1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2014 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "exceptions.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
76 #include "gdb_assert.h"
77 #include <sys/types.h>
79 typedef struct symbol *symbolp;
82 /* When == 1, print basic high level tracing messages.
83 When > 1, be more verbose.
84 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
85 static unsigned int dwarf2_read_debug = 0;
87 /* When non-zero, dump DIEs after they are read in. */
88 static unsigned int dwarf2_die_debug = 0;
90 /* When non-zero, cross-check physname against demangler. */
91 static int check_physname = 0;
93 /* When non-zero, do not reject deprecated .gdb_index sections. */
94 static int use_deprecated_index_sections = 0;
96 static const struct objfile_data *dwarf2_objfile_data_key;
98 /* The "aclass" indices for various kinds of computed DWARF symbols. */
100 static int dwarf2_locexpr_index;
101 static int dwarf2_loclist_index;
102 static int dwarf2_locexpr_block_index;
103 static int dwarf2_loclist_block_index;
105 /* A descriptor for dwarf sections.
107 S.ASECTION, SIZE are typically initialized when the objfile is first
108 scanned. BUFFER, READIN are filled in later when the section is read.
109 If the section contained compressed data then SIZE is updated to record
110 the uncompressed size of the section.
112 DWP file format V2 introduces a wrinkle that is easiest to handle by
113 creating the concept of virtual sections contained within a real section.
114 In DWP V2 the sections of the input DWO files are concatenated together
115 into one section, but section offsets are kept relative to the original
117 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
118 the real section this "virtual" section is contained in, and BUFFER,SIZE
119 describe the virtual section. */
121 struct dwarf2_section_info
125 /* If this is a real section, the bfd section. */
127 /* If this is a virtual section, pointer to the containing ("real")
129 struct dwarf2_section_info *containing_section;
131 /* Pointer to section data, only valid if readin. */
132 const gdb_byte *buffer;
133 /* The size of the section, real or virtual. */
135 /* If this is a virtual section, the offset in the real section.
136 Only valid if is_virtual. */
137 bfd_size_type virtual_offset;
138 /* True if we have tried to read this section. */
140 /* True if this is a virtual section, False otherwise.
141 This specifies which of s.asection and s.containing_section to use. */
145 typedef struct dwarf2_section_info dwarf2_section_info_def;
146 DEF_VEC_O (dwarf2_section_info_def);
148 /* All offsets in the index are of this type. It must be
149 architecture-independent. */
150 typedef uint32_t offset_type;
152 DEF_VEC_I (offset_type);
154 /* Ensure only legit values are used. */
155 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
157 gdb_assert ((unsigned int) (value) <= 1); \
158 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
161 /* Ensure only legit values are used. */
162 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
164 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
165 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
166 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
169 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
170 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
172 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
173 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
176 /* A description of the mapped index. The file format is described in
177 a comment by the code that writes the index. */
180 /* Index data format version. */
183 /* The total length of the buffer. */
186 /* A pointer to the address table data. */
187 const gdb_byte *address_table;
189 /* Size of the address table data in bytes. */
190 offset_type address_table_size;
192 /* The symbol table, implemented as a hash table. */
193 const offset_type *symbol_table;
195 /* Size in slots, each slot is 2 offset_types. */
196 offset_type symbol_table_slots;
198 /* A pointer to the constant pool. */
199 const char *constant_pool;
202 typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr;
203 DEF_VEC_P (dwarf2_per_cu_ptr);
205 /* Collection of data recorded per objfile.
206 This hangs off of dwarf2_objfile_data_key. */
208 struct dwarf2_per_objfile
210 struct dwarf2_section_info info;
211 struct dwarf2_section_info abbrev;
212 struct dwarf2_section_info line;
213 struct dwarf2_section_info loc;
214 struct dwarf2_section_info macinfo;
215 struct dwarf2_section_info macro;
216 struct dwarf2_section_info str;
217 struct dwarf2_section_info ranges;
218 struct dwarf2_section_info addr;
219 struct dwarf2_section_info frame;
220 struct dwarf2_section_info eh_frame;
221 struct dwarf2_section_info gdb_index;
223 VEC (dwarf2_section_info_def) *types;
226 struct objfile *objfile;
228 /* Table of all the compilation units. This is used to locate
229 the target compilation unit of a particular reference. */
230 struct dwarf2_per_cu_data **all_comp_units;
232 /* The number of compilation units in ALL_COMP_UNITS. */
235 /* The number of .debug_types-related CUs. */
238 /* The number of elements allocated in all_type_units.
239 If there are skeleton-less TUs, we add them to all_type_units lazily. */
240 int n_allocated_type_units;
242 /* The .debug_types-related CUs (TUs).
243 This is stored in malloc space because we may realloc it. */
244 struct signatured_type **all_type_units;
246 /* Table of struct type_unit_group objects.
247 The hash key is the DW_AT_stmt_list value. */
248 htab_t type_unit_groups;
250 /* A table mapping .debug_types signatures to its signatured_type entry.
251 This is NULL if the .debug_types section hasn't been read in yet. */
252 htab_t signatured_types;
254 /* Type unit statistics, to see how well the scaling improvements
258 int nr_uniq_abbrev_tables;
260 int nr_symtab_sharers;
261 int nr_stmt_less_type_units;
262 int nr_all_type_units_reallocs;
265 /* A chain of compilation units that are currently read in, so that
266 they can be freed later. */
267 struct dwarf2_per_cu_data *read_in_chain;
269 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
270 This is NULL if the table hasn't been allocated yet. */
273 /* Non-zero if we've check for whether there is a DWP file. */
276 /* The DWP file if there is one, or NULL. */
277 struct dwp_file *dwp_file;
279 /* The shared '.dwz' file, if one exists. This is used when the
280 original data was compressed using 'dwz -m'. */
281 struct dwz_file *dwz_file;
283 /* A flag indicating wether this objfile has a section loaded at a
285 int has_section_at_zero;
287 /* True if we are using the mapped index,
288 or we are faking it for OBJF_READNOW's sake. */
289 unsigned char using_index;
291 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
292 struct mapped_index *index_table;
294 /* When using index_table, this keeps track of all quick_file_names entries.
295 TUs typically share line table entries with a CU, so we maintain a
296 separate table of all line table entries to support the sharing.
297 Note that while there can be way more TUs than CUs, we've already
298 sorted all the TUs into "type unit groups", grouped by their
299 DW_AT_stmt_list value. Therefore the only sharing done here is with a
300 CU and its associated TU group if there is one. */
301 htab_t quick_file_names_table;
303 /* Set during partial symbol reading, to prevent queueing of full
305 int reading_partial_symbols;
307 /* Table mapping type DIEs to their struct type *.
308 This is NULL if not allocated yet.
309 The mapping is done via (CU/TU + DIE offset) -> type. */
310 htab_t die_type_hash;
312 /* The CUs we recently read. */
313 VEC (dwarf2_per_cu_ptr) *just_read_cus;
316 static struct dwarf2_per_objfile *dwarf2_per_objfile;
318 /* Default names of the debugging sections. */
320 /* Note that if the debugging section has been compressed, it might
321 have a name like .zdebug_info. */
323 static const struct dwarf2_debug_sections dwarf2_elf_names =
325 { ".debug_info", ".zdebug_info" },
326 { ".debug_abbrev", ".zdebug_abbrev" },
327 { ".debug_line", ".zdebug_line" },
328 { ".debug_loc", ".zdebug_loc" },
329 { ".debug_macinfo", ".zdebug_macinfo" },
330 { ".debug_macro", ".zdebug_macro" },
331 { ".debug_str", ".zdebug_str" },
332 { ".debug_ranges", ".zdebug_ranges" },
333 { ".debug_types", ".zdebug_types" },
334 { ".debug_addr", ".zdebug_addr" },
335 { ".debug_frame", ".zdebug_frame" },
336 { ".eh_frame", NULL },
337 { ".gdb_index", ".zgdb_index" },
341 /* List of DWO/DWP sections. */
343 static const struct dwop_section_names
345 struct dwarf2_section_names abbrev_dwo;
346 struct dwarf2_section_names info_dwo;
347 struct dwarf2_section_names line_dwo;
348 struct dwarf2_section_names loc_dwo;
349 struct dwarf2_section_names macinfo_dwo;
350 struct dwarf2_section_names macro_dwo;
351 struct dwarf2_section_names str_dwo;
352 struct dwarf2_section_names str_offsets_dwo;
353 struct dwarf2_section_names types_dwo;
354 struct dwarf2_section_names cu_index;
355 struct dwarf2_section_names tu_index;
359 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
360 { ".debug_info.dwo", ".zdebug_info.dwo" },
361 { ".debug_line.dwo", ".zdebug_line.dwo" },
362 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
363 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
364 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
365 { ".debug_str.dwo", ".zdebug_str.dwo" },
366 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
367 { ".debug_types.dwo", ".zdebug_types.dwo" },
368 { ".debug_cu_index", ".zdebug_cu_index" },
369 { ".debug_tu_index", ".zdebug_tu_index" },
372 /* local data types */
374 /* The data in a compilation unit header, after target2host
375 translation, looks like this. */
376 struct comp_unit_head
380 unsigned char addr_size;
381 unsigned char signed_addr_p;
382 sect_offset abbrev_offset;
384 /* Size of file offsets; either 4 or 8. */
385 unsigned int offset_size;
387 /* Size of the length field; either 4 or 12. */
388 unsigned int initial_length_size;
390 /* Offset to the first byte of this compilation unit header in the
391 .debug_info section, for resolving relative reference dies. */
394 /* Offset to first die in this cu from the start of the cu.
395 This will be the first byte following the compilation unit header. */
396 cu_offset first_die_offset;
399 /* Type used for delaying computation of method physnames.
400 See comments for compute_delayed_physnames. */
401 struct delayed_method_info
403 /* The type to which the method is attached, i.e., its parent class. */
406 /* The index of the method in the type's function fieldlists. */
409 /* The index of the method in the fieldlist. */
412 /* The name of the DIE. */
415 /* The DIE associated with this method. */
416 struct die_info *die;
419 typedef struct delayed_method_info delayed_method_info;
420 DEF_VEC_O (delayed_method_info);
422 /* Internal state when decoding a particular compilation unit. */
425 /* The objfile containing this compilation unit. */
426 struct objfile *objfile;
428 /* The header of the compilation unit. */
429 struct comp_unit_head header;
431 /* Base address of this compilation unit. */
432 CORE_ADDR base_address;
434 /* Non-zero if base_address has been set. */
437 /* The language we are debugging. */
438 enum language language;
439 const struct language_defn *language_defn;
441 const char *producer;
443 /* The generic symbol table building routines have separate lists for
444 file scope symbols and all all other scopes (local scopes). So
445 we need to select the right one to pass to add_symbol_to_list().
446 We do it by keeping a pointer to the correct list in list_in_scope.
448 FIXME: The original dwarf code just treated the file scope as the
449 first local scope, and all other local scopes as nested local
450 scopes, and worked fine. Check to see if we really need to
451 distinguish these in buildsym.c. */
452 struct pending **list_in_scope;
454 /* The abbrev table for this CU.
455 Normally this points to the abbrev table in the objfile.
456 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
457 struct abbrev_table *abbrev_table;
459 /* Hash table holding all the loaded partial DIEs
460 with partial_die->offset.SECT_OFF as hash. */
463 /* Storage for things with the same lifetime as this read-in compilation
464 unit, including partial DIEs. */
465 struct obstack comp_unit_obstack;
467 /* When multiple dwarf2_cu structures are living in memory, this field
468 chains them all together, so that they can be released efficiently.
469 We will probably also want a generation counter so that most-recently-used
470 compilation units are cached... */
471 struct dwarf2_per_cu_data *read_in_chain;
473 /* Backlink to our per_cu entry. */
474 struct dwarf2_per_cu_data *per_cu;
476 /* How many compilation units ago was this CU last referenced? */
479 /* A hash table of DIE cu_offset for following references with
480 die_info->offset.sect_off as hash. */
483 /* Full DIEs if read in. */
484 struct die_info *dies;
486 /* A set of pointers to dwarf2_per_cu_data objects for compilation
487 units referenced by this one. Only set during full symbol processing;
488 partial symbol tables do not have dependencies. */
491 /* Header data from the line table, during full symbol processing. */
492 struct line_header *line_header;
494 /* A list of methods which need to have physnames computed
495 after all type information has been read. */
496 VEC (delayed_method_info) *method_list;
498 /* To be copied to symtab->call_site_htab. */
499 htab_t call_site_htab;
501 /* Non-NULL if this CU came from a DWO file.
502 There is an invariant here that is important to remember:
503 Except for attributes copied from the top level DIE in the "main"
504 (or "stub") file in preparation for reading the DWO file
505 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
506 Either there isn't a DWO file (in which case this is NULL and the point
507 is moot), or there is and either we're not going to read it (in which
508 case this is NULL) or there is and we are reading it (in which case this
510 struct dwo_unit *dwo_unit;
512 /* The DW_AT_addr_base attribute if present, zero otherwise
513 (zero is a valid value though).
514 Note this value comes from the Fission stub CU/TU's DIE. */
517 /* The DW_AT_ranges_base attribute if present, zero otherwise
518 (zero is a valid value though).
519 Note this value comes from the Fission stub CU/TU's DIE.
520 Also note that the value is zero in the non-DWO case so this value can
521 be used without needing to know whether DWO files are in use or not.
522 N.B. This does not apply to DW_AT_ranges appearing in
523 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
524 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
525 DW_AT_ranges_base *would* have to be applied, and we'd have to care
526 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
527 ULONGEST ranges_base;
529 /* Mark used when releasing cached dies. */
530 unsigned int mark : 1;
532 /* This CU references .debug_loc. See the symtab->locations_valid field.
533 This test is imperfect as there may exist optimized debug code not using
534 any location list and still facing inlining issues if handled as
535 unoptimized code. For a future better test see GCC PR other/32998. */
536 unsigned int has_loclist : 1;
538 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
539 if all the producer_is_* fields are valid. This information is cached
540 because profiling CU expansion showed excessive time spent in
541 producer_is_gxx_lt_4_6. */
542 unsigned int checked_producer : 1;
543 unsigned int producer_is_gxx_lt_4_6 : 1;
544 unsigned int producer_is_gcc_lt_4_3 : 1;
545 unsigned int producer_is_icc : 1;
547 /* When set, the file that we're processing is known to have
548 debugging info for C++ namespaces. GCC 3.3.x did not produce
549 this information, but later versions do. */
551 unsigned int processing_has_namespace_info : 1;
554 /* Persistent data held for a compilation unit, even when not
555 processing it. We put a pointer to this structure in the
556 read_symtab_private field of the psymtab. */
558 struct dwarf2_per_cu_data
560 /* The start offset and length of this compilation unit.
561 NOTE: Unlike comp_unit_head.length, this length includes
563 If the DIE refers to a DWO file, this is always of the original die,
568 /* Flag indicating this compilation unit will be read in before
569 any of the current compilation units are processed. */
570 unsigned int queued : 1;
572 /* This flag will be set when reading partial DIEs if we need to load
573 absolutely all DIEs for this compilation unit, instead of just the ones
574 we think are interesting. It gets set if we look for a DIE in the
575 hash table and don't find it. */
576 unsigned int load_all_dies : 1;
578 /* Non-zero if this CU is from .debug_types.
579 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
581 unsigned int is_debug_types : 1;
583 /* Non-zero if this CU is from the .dwz file. */
584 unsigned int is_dwz : 1;
586 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
587 This flag is only valid if is_debug_types is true.
588 We can't read a CU directly from a DWO file: There are required
589 attributes in the stub. */
590 unsigned int reading_dwo_directly : 1;
592 /* Non-zero if the TU has been read.
593 This is used to assist the "Stay in DWO Optimization" for Fission:
594 When reading a DWO, it's faster to read TUs from the DWO instead of
595 fetching them from random other DWOs (due to comdat folding).
596 If the TU has already been read, the optimization is unnecessary
597 (and unwise - we don't want to change where gdb thinks the TU lives
599 This flag is only valid if is_debug_types is true. */
600 unsigned int tu_read : 1;
602 /* The section this CU/TU lives in.
603 If the DIE refers to a DWO file, this is always the original die,
605 struct dwarf2_section_info *section;
607 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
608 of the CU cache it gets reset to NULL again. */
609 struct dwarf2_cu *cu;
611 /* The corresponding objfile.
612 Normally we can get the objfile from dwarf2_per_objfile.
613 However we can enter this file with just a "per_cu" handle. */
614 struct objfile *objfile;
616 /* When using partial symbol tables, the 'psymtab' field is active.
617 Otherwise the 'quick' field is active. */
620 /* The partial symbol table associated with this compilation unit,
621 or NULL for unread partial units. */
622 struct partial_symtab *psymtab;
624 /* Data needed by the "quick" functions. */
625 struct dwarf2_per_cu_quick_data *quick;
628 /* The CUs we import using DW_TAG_imported_unit. This is filled in
629 while reading psymtabs, used to compute the psymtab dependencies,
630 and then cleared. Then it is filled in again while reading full
631 symbols, and only deleted when the objfile is destroyed.
633 This is also used to work around a difference between the way gold
634 generates .gdb_index version <=7 and the way gdb does. Arguably this
635 is a gold bug. For symbols coming from TUs, gold records in the index
636 the CU that includes the TU instead of the TU itself. This breaks
637 dw2_lookup_symbol: It assumes that if the index says symbol X lives
638 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
639 will find X. Alas TUs live in their own symtab, so after expanding CU Y
640 we need to look in TU Z to find X. Fortunately, this is akin to
641 DW_TAG_imported_unit, so we just use the same mechanism: For
642 .gdb_index version <=7 this also records the TUs that the CU referred
643 to. Concurrently with this change gdb was modified to emit version 8
644 indices so we only pay a price for gold generated indices.
645 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
646 VEC (dwarf2_per_cu_ptr) *imported_symtabs;
649 /* Entry in the signatured_types hash table. */
651 struct signatured_type
653 /* The "per_cu" object of this type.
654 This struct is used iff per_cu.is_debug_types.
655 N.B.: This is the first member so that it's easy to convert pointers
657 struct dwarf2_per_cu_data per_cu;
659 /* The type's signature. */
662 /* Offset in the TU of the type's DIE, as read from the TU header.
663 If this TU is a DWO stub and the definition lives in a DWO file
664 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
665 cu_offset type_offset_in_tu;
667 /* Offset in the section of the type's DIE.
668 If the definition lives in a DWO file, this is the offset in the
669 .debug_types.dwo section.
670 The value is zero until the actual value is known.
671 Zero is otherwise not a valid section offset. */
672 sect_offset type_offset_in_section;
674 /* Type units are grouped by their DW_AT_stmt_list entry so that they
675 can share them. This points to the containing symtab. */
676 struct type_unit_group *type_unit_group;
679 The first time we encounter this type we fully read it in and install it
680 in the symbol tables. Subsequent times we only need the type. */
683 /* Containing DWO unit.
684 This field is valid iff per_cu.reading_dwo_directly. */
685 struct dwo_unit *dwo_unit;
688 typedef struct signatured_type *sig_type_ptr;
689 DEF_VEC_P (sig_type_ptr);
691 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
692 This includes type_unit_group and quick_file_names. */
694 struct stmt_list_hash
696 /* The DWO unit this table is from or NULL if there is none. */
697 struct dwo_unit *dwo_unit;
699 /* Offset in .debug_line or .debug_line.dwo. */
700 sect_offset line_offset;
703 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
704 an object of this type. */
706 struct type_unit_group
708 /* dwarf2read.c's main "handle" on a TU symtab.
709 To simplify things we create an artificial CU that "includes" all the
710 type units using this stmt_list so that the rest of the code still has
711 a "per_cu" handle on the symtab.
712 This PER_CU is recognized by having no section. */
713 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
714 struct dwarf2_per_cu_data per_cu;
716 /* The TUs that share this DW_AT_stmt_list entry.
717 This is added to while parsing type units to build partial symtabs,
718 and is deleted afterwards and not used again. */
719 VEC (sig_type_ptr) *tus;
721 /* The primary symtab.
722 Type units in a group needn't all be defined in the same source file,
723 so we create an essentially anonymous symtab as the primary symtab. */
724 struct symtab *primary_symtab;
726 /* The data used to construct the hash key. */
727 struct stmt_list_hash hash;
729 /* The number of symtabs from the line header.
730 The value here must match line_header.num_file_names. */
731 unsigned int num_symtabs;
733 /* The symbol tables for this TU (obtained from the files listed in
735 WARNING: The order of entries here must match the order of entries
736 in the line header. After the first TU using this type_unit_group, the
737 line header for the subsequent TUs is recreated from this. This is done
738 because we need to use the same symtabs for each TU using the same
739 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
740 there's no guarantee the line header doesn't have duplicate entries. */
741 struct symtab **symtabs;
744 /* These sections are what may appear in a (real or virtual) DWO file. */
748 struct dwarf2_section_info abbrev;
749 struct dwarf2_section_info line;
750 struct dwarf2_section_info loc;
751 struct dwarf2_section_info macinfo;
752 struct dwarf2_section_info macro;
753 struct dwarf2_section_info str;
754 struct dwarf2_section_info str_offsets;
755 /* In the case of a virtual DWO file, these two are unused. */
756 struct dwarf2_section_info info;
757 VEC (dwarf2_section_info_def) *types;
760 /* CUs/TUs in DWP/DWO files. */
764 /* Backlink to the containing struct dwo_file. */
765 struct dwo_file *dwo_file;
767 /* The "id" that distinguishes this CU/TU.
768 .debug_info calls this "dwo_id", .debug_types calls this "signature".
769 Since signatures came first, we stick with it for consistency. */
772 /* The section this CU/TU lives in, in the DWO file. */
773 struct dwarf2_section_info *section;
775 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
779 /* For types, offset in the type's DIE of the type defined by this TU. */
780 cu_offset type_offset_in_tu;
783 /* include/dwarf2.h defines the DWP section codes.
784 It defines a max value but it doesn't define a min value, which we
785 use for error checking, so provide one. */
787 enum dwp_v2_section_ids
792 /* Data for one DWO file.
794 This includes virtual DWO files (a virtual DWO file is a DWO file as it
795 appears in a DWP file). DWP files don't really have DWO files per se -
796 comdat folding of types "loses" the DWO file they came from, and from
797 a high level view DWP files appear to contain a mass of random types.
798 However, to maintain consistency with the non-DWP case we pretend DWP
799 files contain virtual DWO files, and we assign each TU with one virtual
800 DWO file (generally based on the line and abbrev section offsets -
801 a heuristic that seems to work in practice). */
805 /* The DW_AT_GNU_dwo_name attribute.
806 For virtual DWO files the name is constructed from the section offsets
807 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
808 from related CU+TUs. */
809 const char *dwo_name;
811 /* The DW_AT_comp_dir attribute. */
812 const char *comp_dir;
814 /* The bfd, when the file is open. Otherwise this is NULL.
815 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
818 /* The sections that make up this DWO file.
819 Remember that for virtual DWO files in DWP V2, these are virtual
820 sections (for lack of a better name). */
821 struct dwo_sections sections;
823 /* The CU in the file.
824 We only support one because having more than one requires hacking the
825 dwo_name of each to match, which is highly unlikely to happen.
826 Doing this means all TUs can share comp_dir: We also assume that
827 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
830 /* Table of TUs in the file.
831 Each element is a struct dwo_unit. */
835 /* These sections are what may appear in a DWP file. */
839 /* These are used by both DWP version 1 and 2. */
840 struct dwarf2_section_info str;
841 struct dwarf2_section_info cu_index;
842 struct dwarf2_section_info tu_index;
844 /* These are only used by DWP version 2 files.
845 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
846 sections are referenced by section number, and are not recorded here.
847 In DWP version 2 there is at most one copy of all these sections, each
848 section being (effectively) comprised of the concatenation of all of the
849 individual sections that exist in the version 1 format.
850 To keep the code simple we treat each of these concatenated pieces as a
851 section itself (a virtual section?). */
852 struct dwarf2_section_info abbrev;
853 struct dwarf2_section_info info;
854 struct dwarf2_section_info line;
855 struct dwarf2_section_info loc;
856 struct dwarf2_section_info macinfo;
857 struct dwarf2_section_info macro;
858 struct dwarf2_section_info str_offsets;
859 struct dwarf2_section_info types;
862 /* These sections are what may appear in a virtual DWO file in DWP version 1.
863 A virtual DWO file is a DWO file as it appears in a DWP file. */
865 struct virtual_v1_dwo_sections
867 struct dwarf2_section_info abbrev;
868 struct dwarf2_section_info line;
869 struct dwarf2_section_info loc;
870 struct dwarf2_section_info macinfo;
871 struct dwarf2_section_info macro;
872 struct dwarf2_section_info str_offsets;
873 /* Each DWP hash table entry records one CU or one TU.
874 That is recorded here, and copied to dwo_unit.section. */
875 struct dwarf2_section_info info_or_types;
878 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
879 In version 2, the sections of the DWO files are concatenated together
880 and stored in one section of that name. Thus each ELF section contains
881 several "virtual" sections. */
883 struct virtual_v2_dwo_sections
885 bfd_size_type abbrev_offset;
886 bfd_size_type abbrev_size;
888 bfd_size_type line_offset;
889 bfd_size_type line_size;
891 bfd_size_type loc_offset;
892 bfd_size_type loc_size;
894 bfd_size_type macinfo_offset;
895 bfd_size_type macinfo_size;
897 bfd_size_type macro_offset;
898 bfd_size_type macro_size;
900 bfd_size_type str_offsets_offset;
901 bfd_size_type str_offsets_size;
903 /* Each DWP hash table entry records one CU or one TU.
904 That is recorded here, and copied to dwo_unit.section. */
905 bfd_size_type info_or_types_offset;
906 bfd_size_type info_or_types_size;
909 /* Contents of DWP hash tables. */
911 struct dwp_hash_table
913 uint32_t version, nr_columns;
914 uint32_t nr_units, nr_slots;
915 const gdb_byte *hash_table, *unit_table;
920 const gdb_byte *indices;
924 /* This is indexed by column number and gives the id of the section
926 #define MAX_NR_V2_DWO_SECTIONS \
927 (1 /* .debug_info or .debug_types */ \
928 + 1 /* .debug_abbrev */ \
929 + 1 /* .debug_line */ \
930 + 1 /* .debug_loc */ \
931 + 1 /* .debug_str_offsets */ \
932 + 1 /* .debug_macro or .debug_macinfo */)
933 int section_ids[MAX_NR_V2_DWO_SECTIONS];
934 const gdb_byte *offsets;
935 const gdb_byte *sizes;
940 /* Data for one DWP file. */
944 /* Name of the file. */
947 /* File format version. */
953 /* Section info for this file. */
954 struct dwp_sections sections;
956 /* Table of CUs in the file. */
957 const struct dwp_hash_table *cus;
959 /* Table of TUs in the file. */
960 const struct dwp_hash_table *tus;
962 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
966 /* Table to map ELF section numbers to their sections.
967 This is only needed for the DWP V1 file format. */
968 unsigned int num_sections;
969 asection **elf_sections;
972 /* This represents a '.dwz' file. */
976 /* A dwz file can only contain a few sections. */
977 struct dwarf2_section_info abbrev;
978 struct dwarf2_section_info info;
979 struct dwarf2_section_info str;
980 struct dwarf2_section_info line;
981 struct dwarf2_section_info macro;
982 struct dwarf2_section_info gdb_index;
988 /* Struct used to pass misc. parameters to read_die_and_children, et
989 al. which are used for both .debug_info and .debug_types dies.
990 All parameters here are unchanging for the life of the call. This
991 struct exists to abstract away the constant parameters of die reading. */
993 struct die_reader_specs
995 /* The bfd of die_section. */
998 /* The CU of the DIE we are parsing. */
999 struct dwarf2_cu *cu;
1001 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1002 struct dwo_file *dwo_file;
1004 /* The section the die comes from.
1005 This is either .debug_info or .debug_types, or the .dwo variants. */
1006 struct dwarf2_section_info *die_section;
1008 /* die_section->buffer. */
1009 const gdb_byte *buffer;
1011 /* The end of the buffer. */
1012 const gdb_byte *buffer_end;
1014 /* The value of the DW_AT_comp_dir attribute. */
1015 const char *comp_dir;
1018 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1019 typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader,
1020 const gdb_byte *info_ptr,
1021 struct die_info *comp_unit_die,
1025 /* The line number information for a compilation unit (found in the
1026 .debug_line section) begins with a "statement program header",
1027 which contains the following information. */
1030 unsigned int total_length;
1031 unsigned short version;
1032 unsigned int header_length;
1033 unsigned char minimum_instruction_length;
1034 unsigned char maximum_ops_per_instruction;
1035 unsigned char default_is_stmt;
1037 unsigned char line_range;
1038 unsigned char opcode_base;
1040 /* standard_opcode_lengths[i] is the number of operands for the
1041 standard opcode whose value is i. This means that
1042 standard_opcode_lengths[0] is unused, and the last meaningful
1043 element is standard_opcode_lengths[opcode_base - 1]. */
1044 unsigned char *standard_opcode_lengths;
1046 /* The include_directories table. NOTE! These strings are not
1047 allocated with xmalloc; instead, they are pointers into
1048 debug_line_buffer. If you try to free them, `free' will get
1050 unsigned int num_include_dirs, include_dirs_size;
1051 const char **include_dirs;
1053 /* The file_names table. NOTE! These strings are not allocated
1054 with xmalloc; instead, they are pointers into debug_line_buffer.
1055 Don't try to free them directly. */
1056 unsigned int num_file_names, file_names_size;
1060 unsigned int dir_index;
1061 unsigned int mod_time;
1062 unsigned int length;
1063 int included_p; /* Non-zero if referenced by the Line Number Program. */
1064 struct symtab *symtab; /* The associated symbol table, if any. */
1067 /* The start and end of the statement program following this
1068 header. These point into dwarf2_per_objfile->line_buffer. */
1069 const gdb_byte *statement_program_start, *statement_program_end;
1072 /* When we construct a partial symbol table entry we only
1073 need this much information. */
1074 struct partial_die_info
1076 /* Offset of this DIE. */
1079 /* DWARF-2 tag for this DIE. */
1080 ENUM_BITFIELD(dwarf_tag) tag : 16;
1082 /* Assorted flags describing the data found in this DIE. */
1083 unsigned int has_children : 1;
1084 unsigned int is_external : 1;
1085 unsigned int is_declaration : 1;
1086 unsigned int has_type : 1;
1087 unsigned int has_specification : 1;
1088 unsigned int has_pc_info : 1;
1089 unsigned int may_be_inlined : 1;
1091 /* Flag set if the SCOPE field of this structure has been
1093 unsigned int scope_set : 1;
1095 /* Flag set if the DIE has a byte_size attribute. */
1096 unsigned int has_byte_size : 1;
1098 /* Flag set if any of the DIE's children are template arguments. */
1099 unsigned int has_template_arguments : 1;
1101 /* Flag set if fixup_partial_die has been called on this die. */
1102 unsigned int fixup_called : 1;
1104 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1105 unsigned int is_dwz : 1;
1107 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1108 unsigned int spec_is_dwz : 1;
1110 /* The name of this DIE. Normally the value of DW_AT_name, but
1111 sometimes a default name for unnamed DIEs. */
1114 /* The linkage name, if present. */
1115 const char *linkage_name;
1117 /* The scope to prepend to our children. This is generally
1118 allocated on the comp_unit_obstack, so will disappear
1119 when this compilation unit leaves the cache. */
1122 /* Some data associated with the partial DIE. The tag determines
1123 which field is live. */
1126 /* The location description associated with this DIE, if any. */
1127 struct dwarf_block *locdesc;
1128 /* The offset of an import, for DW_TAG_imported_unit. */
1132 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1136 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1137 DW_AT_sibling, if any. */
1138 /* NOTE: This member isn't strictly necessary, read_partial_die could
1139 return DW_AT_sibling values to its caller load_partial_dies. */
1140 const gdb_byte *sibling;
1142 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1143 DW_AT_specification (or DW_AT_abstract_origin or
1144 DW_AT_extension). */
1145 sect_offset spec_offset;
1147 /* Pointers to this DIE's parent, first child, and next sibling,
1149 struct partial_die_info *die_parent, *die_child, *die_sibling;
1152 /* This data structure holds the information of an abbrev. */
1155 unsigned int number; /* number identifying abbrev */
1156 enum dwarf_tag tag; /* dwarf tag */
1157 unsigned short has_children; /* boolean */
1158 unsigned short num_attrs; /* number of attributes */
1159 struct attr_abbrev *attrs; /* an array of attribute descriptions */
1160 struct abbrev_info *next; /* next in chain */
1165 ENUM_BITFIELD(dwarf_attribute) name : 16;
1166 ENUM_BITFIELD(dwarf_form) form : 16;
1169 /* Size of abbrev_table.abbrev_hash_table. */
1170 #define ABBREV_HASH_SIZE 121
1172 /* Top level data structure to contain an abbreviation table. */
1176 /* Where the abbrev table came from.
1177 This is used as a sanity check when the table is used. */
1180 /* Storage for the abbrev table. */
1181 struct obstack abbrev_obstack;
1183 /* Hash table of abbrevs.
1184 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1185 It could be statically allocated, but the previous code didn't so we
1187 struct abbrev_info **abbrevs;
1190 /* Attributes have a name and a value. */
1193 ENUM_BITFIELD(dwarf_attribute) name : 16;
1194 ENUM_BITFIELD(dwarf_form) form : 15;
1196 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1197 field should be in u.str (existing only for DW_STRING) but it is kept
1198 here for better struct attribute alignment. */
1199 unsigned int string_is_canonical : 1;
1204 struct dwarf_block *blk;
1213 /* This data structure holds a complete die structure. */
1216 /* DWARF-2 tag for this DIE. */
1217 ENUM_BITFIELD(dwarf_tag) tag : 16;
1219 /* Number of attributes */
1220 unsigned char num_attrs;
1222 /* True if we're presently building the full type name for the
1223 type derived from this DIE. */
1224 unsigned char building_fullname : 1;
1226 /* True if this die is in process. PR 16581. */
1227 unsigned char in_process : 1;
1230 unsigned int abbrev;
1232 /* Offset in .debug_info or .debug_types section. */
1235 /* The dies in a compilation unit form an n-ary tree. PARENT
1236 points to this die's parent; CHILD points to the first child of
1237 this node; and all the children of a given node are chained
1238 together via their SIBLING fields. */
1239 struct die_info *child; /* Its first child, if any. */
1240 struct die_info *sibling; /* Its next sibling, if any. */
1241 struct die_info *parent; /* Its parent, if any. */
1243 /* An array of attributes, with NUM_ATTRS elements. There may be
1244 zero, but it's not common and zero-sized arrays are not
1245 sufficiently portable C. */
1246 struct attribute attrs[1];
1249 /* Get at parts of an attribute structure. */
1251 #define DW_STRING(attr) ((attr)->u.str)
1252 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1253 #define DW_UNSND(attr) ((attr)->u.unsnd)
1254 #define DW_BLOCK(attr) ((attr)->u.blk)
1255 #define DW_SND(attr) ((attr)->u.snd)
1256 #define DW_ADDR(attr) ((attr)->u.addr)
1257 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1259 /* Blocks are a bunch of untyped bytes. */
1264 /* Valid only if SIZE is not zero. */
1265 const gdb_byte *data;
1268 #ifndef ATTR_ALLOC_CHUNK
1269 #define ATTR_ALLOC_CHUNK 4
1272 /* Allocate fields for structs, unions and enums in this size. */
1273 #ifndef DW_FIELD_ALLOC_CHUNK
1274 #define DW_FIELD_ALLOC_CHUNK 4
1277 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1278 but this would require a corresponding change in unpack_field_as_long
1280 static int bits_per_byte = 8;
1282 /* The routines that read and process dies for a C struct or C++ class
1283 pass lists of data member fields and lists of member function fields
1284 in an instance of a field_info structure, as defined below. */
1287 /* List of data member and baseclasses fields. */
1290 struct nextfield *next;
1295 *fields, *baseclasses;
1297 /* Number of fields (including baseclasses). */
1300 /* Number of baseclasses. */
1303 /* Set if the accesibility of one of the fields is not public. */
1304 int non_public_fields;
1306 /* Member function fields array, entries are allocated in the order they
1307 are encountered in the object file. */
1310 struct nextfnfield *next;
1311 struct fn_field fnfield;
1315 /* Member function fieldlist array, contains name of possibly overloaded
1316 member function, number of overloaded member functions and a pointer
1317 to the head of the member function field chain. */
1322 struct nextfnfield *head;
1326 /* Number of entries in the fnfieldlists array. */
1329 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1330 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1331 struct typedef_field_list
1333 struct typedef_field field;
1334 struct typedef_field_list *next;
1336 *typedef_field_list;
1337 unsigned typedef_field_list_count;
1340 /* One item on the queue of compilation units to read in full symbols
1342 struct dwarf2_queue_item
1344 struct dwarf2_per_cu_data *per_cu;
1345 enum language pretend_language;
1346 struct dwarf2_queue_item *next;
1349 /* The current queue. */
1350 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
1352 /* Loaded secondary compilation units are kept in memory until they
1353 have not been referenced for the processing of this many
1354 compilation units. Set this to zero to disable caching. Cache
1355 sizes of up to at least twenty will improve startup time for
1356 typical inter-CU-reference binaries, at an obvious memory cost. */
1357 static int dwarf2_max_cache_age = 5;
1359 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
1360 struct cmd_list_element *c, const char *value)
1362 fprintf_filtered (file, _("The upper bound on the age of cached "
1363 "dwarf2 compilation units is %s.\n"),
1367 /* local function prototypes */
1369 static const char *get_section_name (const struct dwarf2_section_info *);
1371 static const char *get_section_file_name (const struct dwarf2_section_info *);
1373 static void dwarf2_locate_sections (bfd *, asection *, void *);
1375 static void dwarf2_find_base_address (struct die_info *die,
1376 struct dwarf2_cu *cu);
1378 static struct partial_symtab *create_partial_symtab
1379 (struct dwarf2_per_cu_data *per_cu, const char *name);
1381 static void dwarf2_build_psymtabs_hard (struct objfile *);
1383 static void scan_partial_symbols (struct partial_die_info *,
1384 CORE_ADDR *, CORE_ADDR *,
1385 int, struct dwarf2_cu *);
1387 static void add_partial_symbol (struct partial_die_info *,
1388 struct dwarf2_cu *);
1390 static void add_partial_namespace (struct partial_die_info *pdi,
1391 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1392 int need_pc, struct dwarf2_cu *cu);
1394 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
1395 CORE_ADDR *highpc, int need_pc,
1396 struct dwarf2_cu *cu);
1398 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
1399 struct dwarf2_cu *cu);
1401 static void add_partial_subprogram (struct partial_die_info *pdi,
1402 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1403 int need_pc, struct dwarf2_cu *cu);
1405 static void dwarf2_read_symtab (struct partial_symtab *,
1408 static void psymtab_to_symtab_1 (struct partial_symtab *);
1410 static struct abbrev_info *abbrev_table_lookup_abbrev
1411 (const struct abbrev_table *, unsigned int);
1413 static struct abbrev_table *abbrev_table_read_table
1414 (struct dwarf2_section_info *, sect_offset);
1416 static void abbrev_table_free (struct abbrev_table *);
1418 static void abbrev_table_free_cleanup (void *);
1420 static void dwarf2_read_abbrevs (struct dwarf2_cu *,
1421 struct dwarf2_section_info *);
1423 static void dwarf2_free_abbrev_table (void *);
1425 static unsigned int peek_abbrev_code (bfd *, const gdb_byte *);
1427 static struct partial_die_info *load_partial_dies
1428 (const struct die_reader_specs *, const gdb_byte *, int);
1430 static const gdb_byte *read_partial_die (const struct die_reader_specs *,
1431 struct partial_die_info *,
1432 struct abbrev_info *,
1436 static struct partial_die_info *find_partial_die (sect_offset, int,
1437 struct dwarf2_cu *);
1439 static void fixup_partial_die (struct partial_die_info *,
1440 struct dwarf2_cu *);
1442 static const gdb_byte *read_attribute (const struct die_reader_specs *,
1443 struct attribute *, struct attr_abbrev *,
1446 static unsigned int read_1_byte (bfd *, const gdb_byte *);
1448 static int read_1_signed_byte (bfd *, const gdb_byte *);
1450 static unsigned int read_2_bytes (bfd *, const gdb_byte *);
1452 static unsigned int read_4_bytes (bfd *, const gdb_byte *);
1454 static ULONGEST read_8_bytes (bfd *, const gdb_byte *);
1456 static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *,
1459 static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *);
1461 static LONGEST read_checked_initial_length_and_offset
1462 (bfd *, const gdb_byte *, const struct comp_unit_head *,
1463 unsigned int *, unsigned int *);
1465 static LONGEST read_offset (bfd *, const gdb_byte *,
1466 const struct comp_unit_head *,
1469 static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int);
1471 static sect_offset read_abbrev_offset (struct dwarf2_section_info *,
1474 static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int);
1476 static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *);
1478 static const char *read_indirect_string (bfd *, const gdb_byte *,
1479 const struct comp_unit_head *,
1482 static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST);
1484 static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *);
1486 static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *);
1488 static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *,
1492 static const char *read_str_index (const struct die_reader_specs *reader,
1493 ULONGEST str_index);
1495 static void set_cu_language (unsigned int, struct dwarf2_cu *);
1497 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
1498 struct dwarf2_cu *);
1500 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
1503 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
1504 struct dwarf2_cu *cu);
1506 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
1508 static struct die_info *die_specification (struct die_info *die,
1509 struct dwarf2_cu **);
1511 static void free_line_header (struct line_header *lh);
1513 static struct line_header *dwarf_decode_line_header (unsigned int offset,
1514 struct dwarf2_cu *cu);
1516 static void dwarf_decode_lines (struct line_header *, const char *,
1517 struct dwarf2_cu *, struct partial_symtab *,
1520 static void dwarf2_start_subfile (const char *, const char *, const char *);
1522 static void dwarf2_start_symtab (struct dwarf2_cu *,
1523 const char *, const char *, CORE_ADDR);
1525 static struct symbol *new_symbol (struct die_info *, struct type *,
1526 struct dwarf2_cu *);
1528 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1529 struct dwarf2_cu *, struct symbol *);
1531 static void dwarf2_const_value (const struct attribute *, struct symbol *,
1532 struct dwarf2_cu *);
1534 static void dwarf2_const_value_attr (const struct attribute *attr,
1537 struct obstack *obstack,
1538 struct dwarf2_cu *cu, LONGEST *value,
1539 const gdb_byte **bytes,
1540 struct dwarf2_locexpr_baton **baton);
1542 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1544 static int need_gnat_info (struct dwarf2_cu *);
1546 static struct type *die_descriptive_type (struct die_info *,
1547 struct dwarf2_cu *);
1549 static void set_descriptive_type (struct type *, struct die_info *,
1550 struct dwarf2_cu *);
1552 static struct type *die_containing_type (struct die_info *,
1553 struct dwarf2_cu *);
1555 static struct type *lookup_die_type (struct die_info *, const struct attribute *,
1556 struct dwarf2_cu *);
1558 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1560 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1562 static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1564 static char *typename_concat (struct obstack *obs, const char *prefix,
1565 const char *suffix, int physname,
1566 struct dwarf2_cu *cu);
1568 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1570 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1572 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1574 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1576 static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu);
1578 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1579 struct dwarf2_cu *, struct partial_symtab *);
1581 static int dwarf2_get_pc_bounds (struct die_info *,
1582 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1583 struct partial_symtab *);
1585 static void get_scope_pc_bounds (struct die_info *,
1586 CORE_ADDR *, CORE_ADDR *,
1587 struct dwarf2_cu *);
1589 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1590 CORE_ADDR, struct dwarf2_cu *);
1592 static void dwarf2_add_field (struct field_info *, struct die_info *,
1593 struct dwarf2_cu *);
1595 static void dwarf2_attach_fields_to_type (struct field_info *,
1596 struct type *, struct dwarf2_cu *);
1598 static void dwarf2_add_member_fn (struct field_info *,
1599 struct die_info *, struct type *,
1600 struct dwarf2_cu *);
1602 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1604 struct dwarf2_cu *);
1606 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1608 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1610 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1612 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1614 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1616 static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu);
1618 static struct type *read_module_type (struct die_info *die,
1619 struct dwarf2_cu *cu);
1621 static const char *namespace_name (struct die_info *die,
1622 int *is_anonymous, struct dwarf2_cu *);
1624 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1626 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1628 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1629 struct dwarf2_cu *);
1631 static struct die_info *read_die_and_siblings_1
1632 (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **,
1635 static struct die_info *read_die_and_siblings (const struct die_reader_specs *,
1636 const gdb_byte *info_ptr,
1637 const gdb_byte **new_info_ptr,
1638 struct die_info *parent);
1640 static const gdb_byte *read_full_die_1 (const struct die_reader_specs *,
1641 struct die_info **, const gdb_byte *,
1644 static const gdb_byte *read_full_die (const struct die_reader_specs *,
1645 struct die_info **, const gdb_byte *,
1648 static void process_die (struct die_info *, struct dwarf2_cu *);
1650 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *,
1653 static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1655 static const char *dwarf2_full_name (const char *name,
1656 struct die_info *die,
1657 struct dwarf2_cu *cu);
1659 static const char *dwarf2_physname (const char *name, struct die_info *die,
1660 struct dwarf2_cu *cu);
1662 static struct die_info *dwarf2_extension (struct die_info *die,
1663 struct dwarf2_cu **);
1665 static const char *dwarf_tag_name (unsigned int);
1667 static const char *dwarf_attr_name (unsigned int);
1669 static const char *dwarf_form_name (unsigned int);
1671 static char *dwarf_bool_name (unsigned int);
1673 static const char *dwarf_type_encoding_name (unsigned int);
1675 static struct die_info *sibling_die (struct die_info *);
1677 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1679 static void dump_die_for_error (struct die_info *);
1681 static void dump_die_1 (struct ui_file *, int level, int max_level,
1684 /*static*/ void dump_die (struct die_info *, int max_level);
1686 static void store_in_ref_table (struct die_info *,
1687 struct dwarf2_cu *);
1689 static sect_offset dwarf2_get_ref_die_offset (const struct attribute *);
1691 static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int);
1693 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1694 const struct attribute *,
1695 struct dwarf2_cu **);
1697 static struct die_info *follow_die_ref (struct die_info *,
1698 const struct attribute *,
1699 struct dwarf2_cu **);
1701 static struct die_info *follow_die_sig (struct die_info *,
1702 const struct attribute *,
1703 struct dwarf2_cu **);
1705 static struct type *get_signatured_type (struct die_info *, ULONGEST,
1706 struct dwarf2_cu *);
1708 static struct type *get_DW_AT_signature_type (struct die_info *,
1709 const struct attribute *,
1710 struct dwarf2_cu *);
1712 static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu);
1714 static void read_signatured_type (struct signatured_type *);
1716 /* memory allocation interface */
1718 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1720 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1722 static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int,
1725 static int attr_form_is_block (const struct attribute *);
1727 static int attr_form_is_section_offset (const struct attribute *);
1729 static int attr_form_is_constant (const struct attribute *);
1731 static int attr_form_is_ref (const struct attribute *);
1733 static void fill_in_loclist_baton (struct dwarf2_cu *cu,
1734 struct dwarf2_loclist_baton *baton,
1735 const struct attribute *attr);
1737 static void dwarf2_symbol_mark_computed (const struct attribute *attr,
1739 struct dwarf2_cu *cu,
1742 static const gdb_byte *skip_one_die (const struct die_reader_specs *reader,
1743 const gdb_byte *info_ptr,
1744 struct abbrev_info *abbrev);
1746 static void free_stack_comp_unit (void *);
1748 static hashval_t partial_die_hash (const void *item);
1750 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1752 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1753 (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile);
1755 static void init_one_comp_unit (struct dwarf2_cu *cu,
1756 struct dwarf2_per_cu_data *per_cu);
1758 static void prepare_one_comp_unit (struct dwarf2_cu *cu,
1759 struct die_info *comp_unit_die,
1760 enum language pretend_language);
1762 static void free_heap_comp_unit (void *);
1764 static void free_cached_comp_units (void *);
1766 static void age_cached_comp_units (void);
1768 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *);
1770 static struct type *set_die_type (struct die_info *, struct type *,
1771 struct dwarf2_cu *);
1773 static void create_all_comp_units (struct objfile *);
1775 static int create_all_type_units (struct objfile *);
1777 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1780 static void process_full_comp_unit (struct dwarf2_per_cu_data *,
1783 static void process_full_type_unit (struct dwarf2_per_cu_data *,
1786 static void dwarf2_add_dependence (struct dwarf2_cu *,
1787 struct dwarf2_per_cu_data *);
1789 static void dwarf2_mark (struct dwarf2_cu *);
1791 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1793 static struct type *get_die_type_at_offset (sect_offset,
1794 struct dwarf2_per_cu_data *);
1796 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1798 static void dwarf2_release_queue (void *dummy);
1800 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1801 enum language pretend_language);
1803 static void process_queue (void);
1805 static void find_file_and_directory (struct die_info *die,
1806 struct dwarf2_cu *cu,
1807 const char **name, const char **comp_dir);
1809 static char *file_full_name (int file, struct line_header *lh,
1810 const char *comp_dir);
1812 static const gdb_byte *read_and_check_comp_unit_head
1813 (struct comp_unit_head *header,
1814 struct dwarf2_section_info *section,
1815 struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr,
1816 int is_debug_types_section);
1818 static void init_cutu_and_read_dies
1819 (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table,
1820 int use_existing_cu, int keep,
1821 die_reader_func_ftype *die_reader_func, void *data);
1823 static void init_cutu_and_read_dies_simple
1824 (struct dwarf2_per_cu_data *this_cu,
1825 die_reader_func_ftype *die_reader_func, void *data);
1827 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1829 static htab_t allocate_dwo_unit_table (struct objfile *objfile);
1831 static struct dwo_unit *lookup_dwo_unit_in_dwp
1832 (struct dwp_file *dwp_file, const char *comp_dir,
1833 ULONGEST signature, int is_debug_types);
1835 static struct dwp_file *get_dwp_file (void);
1837 static struct dwo_unit *lookup_dwo_comp_unit
1838 (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST);
1840 static struct dwo_unit *lookup_dwo_type_unit
1841 (struct signatured_type *, const char *, const char *);
1843 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *);
1845 static void free_dwo_file_cleanup (void *);
1847 static void process_cu_includes (void);
1849 static void check_producer (struct dwarf2_cu *cu);
1851 /* Various complaints about symbol reading that don't abort the process. */
1854 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1856 complaint (&symfile_complaints,
1857 _("statement list doesn't fit in .debug_line section"));
1861 dwarf2_debug_line_missing_file_complaint (void)
1863 complaint (&symfile_complaints,
1864 _(".debug_line section has line data without a file"));
1868 dwarf2_debug_line_missing_end_sequence_complaint (void)
1870 complaint (&symfile_complaints,
1871 _(".debug_line section has line "
1872 "program sequence without an end"));
1876 dwarf2_complex_location_expr_complaint (void)
1878 complaint (&symfile_complaints, _("location expression too complex"));
1882 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
1885 complaint (&symfile_complaints,
1886 _("const value length mismatch for '%s', got %d, expected %d"),
1891 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
1893 complaint (&symfile_complaints,
1894 _("debug info runs off end of %s section"
1896 get_section_name (section),
1897 get_section_file_name (section));
1901 dwarf2_macro_malformed_definition_complaint (const char *arg1)
1903 complaint (&symfile_complaints,
1904 _("macro debug info contains a "
1905 "malformed macro definition:\n`%s'"),
1910 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
1912 complaint (&symfile_complaints,
1913 _("invalid attribute class or form for '%s' in '%s'"),
1919 /* Convert VALUE between big- and little-endian. */
1921 byte_swap (offset_type value)
1925 result = (value & 0xff) << 24;
1926 result |= (value & 0xff00) << 8;
1927 result |= (value & 0xff0000) >> 8;
1928 result |= (value & 0xff000000) >> 24;
1932 #define MAYBE_SWAP(V) byte_swap (V)
1935 #define MAYBE_SWAP(V) (V)
1936 #endif /* WORDS_BIGENDIAN */
1938 /* Read the given attribute value as an address, taking the attribute's
1939 form into account. */
1942 attr_value_as_address (struct attribute *attr)
1946 if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index)
1948 /* Aside from a few clearly defined exceptions, attributes that
1949 contain an address must always be in DW_FORM_addr form.
1950 Unfortunately, some compilers happen to be violating this
1951 requirement by encoding addresses using other forms, such
1952 as DW_FORM_data4 for example. For those broken compilers,
1953 we try to do our best, without any guarantee of success,
1954 to interpret the address correctly. It would also be nice
1955 to generate a complaint, but that would require us to maintain
1956 a list of legitimate cases where a non-address form is allowed,
1957 as well as update callers to pass in at least the CU's DWARF
1958 version. This is more overhead than what we're willing to
1959 expand for a pretty rare case. */
1960 addr = DW_UNSND (attr);
1963 addr = DW_ADDR (attr);
1968 /* The suffix for an index file. */
1969 #define INDEX_SUFFIX ".gdb-index"
1971 /* Try to locate the sections we need for DWARF 2 debugging
1972 information and return true if we have enough to do something.
1973 NAMES points to the dwarf2 section names, or is NULL if the standard
1974 ELF names are used. */
1977 dwarf2_has_info (struct objfile *objfile,
1978 const struct dwarf2_debug_sections *names)
1980 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1981 if (!dwarf2_per_objfile)
1983 /* Initialize per-objfile state. */
1984 struct dwarf2_per_objfile *data
1985 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1987 memset (data, 0, sizeof (*data));
1988 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1989 dwarf2_per_objfile = data;
1991 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections,
1993 dwarf2_per_objfile->objfile = objfile;
1995 return (!dwarf2_per_objfile->info.is_virtual
1996 && dwarf2_per_objfile->info.s.asection != NULL
1997 && !dwarf2_per_objfile->abbrev.is_virtual
1998 && dwarf2_per_objfile->abbrev.s.asection != NULL);
2001 /* Return the containing section of virtual section SECTION. */
2003 static struct dwarf2_section_info *
2004 get_containing_section (const struct dwarf2_section_info *section)
2006 gdb_assert (section->is_virtual);
2007 return section->s.containing_section;
2010 /* Return the bfd owner of SECTION. */
2013 get_section_bfd_owner (const struct dwarf2_section_info *section)
2015 if (section->is_virtual)
2017 section = get_containing_section (section);
2018 gdb_assert (!section->is_virtual);
2020 return section->s.asection->owner;
2023 /* Return the bfd section of SECTION.
2024 Returns NULL if the section is not present. */
2027 get_section_bfd_section (const struct dwarf2_section_info *section)
2029 if (section->is_virtual)
2031 section = get_containing_section (section);
2032 gdb_assert (!section->is_virtual);
2034 return section->s.asection;
2037 /* Return the name of SECTION. */
2040 get_section_name (const struct dwarf2_section_info *section)
2042 asection *sectp = get_section_bfd_section (section);
2044 gdb_assert (sectp != NULL);
2045 return bfd_section_name (get_section_bfd_owner (section), sectp);
2048 /* Return the name of the file SECTION is in. */
2051 get_section_file_name (const struct dwarf2_section_info *section)
2053 bfd *abfd = get_section_bfd_owner (section);
2055 return bfd_get_filename (abfd);
2058 /* Return the id of SECTION.
2059 Returns 0 if SECTION doesn't exist. */
2062 get_section_id (const struct dwarf2_section_info *section)
2064 asection *sectp = get_section_bfd_section (section);
2071 /* Return the flags of SECTION.
2072 SECTION (or containing section if this is a virtual section) must exist. */
2075 get_section_flags (const struct dwarf2_section_info *section)
2077 asection *sectp = get_section_bfd_section (section);
2079 gdb_assert (sectp != NULL);
2080 return bfd_get_section_flags (sectp->owner, sectp);
2083 /* When loading sections, we look either for uncompressed section or for
2084 compressed section names. */
2087 section_is_p (const char *section_name,
2088 const struct dwarf2_section_names *names)
2090 if (names->normal != NULL
2091 && strcmp (section_name, names->normal) == 0)
2093 if (names->compressed != NULL
2094 && strcmp (section_name, names->compressed) == 0)
2099 /* This function is mapped across the sections and remembers the
2100 offset and size of each of the debugging sections we are interested
2104 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames)
2106 const struct dwarf2_debug_sections *names;
2107 flagword aflag = bfd_get_section_flags (abfd, sectp);
2110 names = &dwarf2_elf_names;
2112 names = (const struct dwarf2_debug_sections *) vnames;
2114 if ((aflag & SEC_HAS_CONTENTS) == 0)
2117 else if (section_is_p (sectp->name, &names->info))
2119 dwarf2_per_objfile->info.s.asection = sectp;
2120 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
2122 else if (section_is_p (sectp->name, &names->abbrev))
2124 dwarf2_per_objfile->abbrev.s.asection = sectp;
2125 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
2127 else if (section_is_p (sectp->name, &names->line))
2129 dwarf2_per_objfile->line.s.asection = sectp;
2130 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
2132 else if (section_is_p (sectp->name, &names->loc))
2134 dwarf2_per_objfile->loc.s.asection = sectp;
2135 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
2137 else if (section_is_p (sectp->name, &names->macinfo))
2139 dwarf2_per_objfile->macinfo.s.asection = sectp;
2140 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
2142 else if (section_is_p (sectp->name, &names->macro))
2144 dwarf2_per_objfile->macro.s.asection = sectp;
2145 dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp);
2147 else if (section_is_p (sectp->name, &names->str))
2149 dwarf2_per_objfile->str.s.asection = sectp;
2150 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
2152 else if (section_is_p (sectp->name, &names->addr))
2154 dwarf2_per_objfile->addr.s.asection = sectp;
2155 dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp);
2157 else if (section_is_p (sectp->name, &names->frame))
2159 dwarf2_per_objfile->frame.s.asection = sectp;
2160 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
2162 else if (section_is_p (sectp->name, &names->eh_frame))
2164 dwarf2_per_objfile->eh_frame.s.asection = sectp;
2165 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
2167 else if (section_is_p (sectp->name, &names->ranges))
2169 dwarf2_per_objfile->ranges.s.asection = sectp;
2170 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
2172 else if (section_is_p (sectp->name, &names->types))
2174 struct dwarf2_section_info type_section;
2176 memset (&type_section, 0, sizeof (type_section));
2177 type_section.s.asection = sectp;
2178 type_section.size = bfd_get_section_size (sectp);
2180 VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types,
2183 else if (section_is_p (sectp->name, &names->gdb_index))
2185 dwarf2_per_objfile->gdb_index.s.asection = sectp;
2186 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
2189 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
2190 && bfd_section_vma (abfd, sectp) == 0)
2191 dwarf2_per_objfile->has_section_at_zero = 1;
2194 /* A helper function that decides whether a section is empty,
2198 dwarf2_section_empty_p (const struct dwarf2_section_info *section)
2200 if (section->is_virtual)
2201 return section->size == 0;
2202 return section->s.asection == NULL || section->size == 0;
2205 /* Read the contents of the section INFO.
2206 OBJFILE is the main object file, but not necessarily the file where
2207 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2209 If the section is compressed, uncompress it before returning. */
2212 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
2216 gdb_byte *buf, *retbuf;
2220 info->buffer = NULL;
2223 if (dwarf2_section_empty_p (info))
2226 sectp = get_section_bfd_section (info);
2228 /* If this is a virtual section we need to read in the real one first. */
2229 if (info->is_virtual)
2231 struct dwarf2_section_info *containing_section =
2232 get_containing_section (info);
2234 gdb_assert (sectp != NULL);
2235 if ((sectp->flags & SEC_RELOC) != 0)
2237 error (_("Dwarf Error: DWP format V2 with relocations is not"
2238 " supported in section %s [in module %s]"),
2239 get_section_name (info), get_section_file_name (info));
2241 dwarf2_read_section (objfile, containing_section);
2242 /* Other code should have already caught virtual sections that don't
2244 gdb_assert (info->virtual_offset + info->size
2245 <= containing_section->size);
2246 /* If the real section is empty or there was a problem reading the
2247 section we shouldn't get here. */
2248 gdb_assert (containing_section->buffer != NULL);
2249 info->buffer = containing_section->buffer + info->virtual_offset;
2253 /* If the section has relocations, we must read it ourselves.
2254 Otherwise we attach it to the BFD. */
2255 if ((sectp->flags & SEC_RELOC) == 0)
2257 info->buffer = gdb_bfd_map_section (sectp, &info->size);
2261 buf = obstack_alloc (&objfile->objfile_obstack, info->size);
2264 /* When debugging .o files, we may need to apply relocations; see
2265 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2266 We never compress sections in .o files, so we only need to
2267 try this when the section is not compressed. */
2268 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
2271 info->buffer = retbuf;
2275 abfd = get_section_bfd_owner (info);
2276 gdb_assert (abfd != NULL);
2278 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
2279 || bfd_bread (buf, info->size, abfd) != info->size)
2281 error (_("Dwarf Error: Can't read DWARF data"
2282 " in section %s [in module %s]"),
2283 bfd_section_name (abfd, sectp), bfd_get_filename (abfd));
2287 /* A helper function that returns the size of a section in a safe way.
2288 If you are positive that the section has been read before using the
2289 size, then it is safe to refer to the dwarf2_section_info object's
2290 "size" field directly. In other cases, you must call this
2291 function, because for compressed sections the size field is not set
2292 correctly until the section has been read. */
2294 static bfd_size_type
2295 dwarf2_section_size (struct objfile *objfile,
2296 struct dwarf2_section_info *info)
2299 dwarf2_read_section (objfile, info);
2303 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2307 dwarf2_get_section_info (struct objfile *objfile,
2308 enum dwarf2_section_enum sect,
2309 asection **sectp, const gdb_byte **bufp,
2310 bfd_size_type *sizep)
2312 struct dwarf2_per_objfile *data
2313 = objfile_data (objfile, dwarf2_objfile_data_key);
2314 struct dwarf2_section_info *info;
2316 /* We may see an objfile without any DWARF, in which case we just
2327 case DWARF2_DEBUG_FRAME:
2328 info = &data->frame;
2330 case DWARF2_EH_FRAME:
2331 info = &data->eh_frame;
2334 gdb_assert_not_reached ("unexpected section");
2337 dwarf2_read_section (objfile, info);
2339 *sectp = get_section_bfd_section (info);
2340 *bufp = info->buffer;
2341 *sizep = info->size;
2344 /* A helper function to find the sections for a .dwz file. */
2347 locate_dwz_sections (bfd *abfd, asection *sectp, void *arg)
2349 struct dwz_file *dwz_file = arg;
2351 /* Note that we only support the standard ELF names, because .dwz
2352 is ELF-only (at the time of writing). */
2353 if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev))
2355 dwz_file->abbrev.s.asection = sectp;
2356 dwz_file->abbrev.size = bfd_get_section_size (sectp);
2358 else if (section_is_p (sectp->name, &dwarf2_elf_names.info))
2360 dwz_file->info.s.asection = sectp;
2361 dwz_file->info.size = bfd_get_section_size (sectp);
2363 else if (section_is_p (sectp->name, &dwarf2_elf_names.str))
2365 dwz_file->str.s.asection = sectp;
2366 dwz_file->str.size = bfd_get_section_size (sectp);
2368 else if (section_is_p (sectp->name, &dwarf2_elf_names.line))
2370 dwz_file->line.s.asection = sectp;
2371 dwz_file->line.size = bfd_get_section_size (sectp);
2373 else if (section_is_p (sectp->name, &dwarf2_elf_names.macro))
2375 dwz_file->macro.s.asection = sectp;
2376 dwz_file->macro.size = bfd_get_section_size (sectp);
2378 else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index))
2380 dwz_file->gdb_index.s.asection = sectp;
2381 dwz_file->gdb_index.size = bfd_get_section_size (sectp);
2385 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2386 there is no .gnu_debugaltlink section in the file. Error if there
2387 is such a section but the file cannot be found. */
2389 static struct dwz_file *
2390 dwarf2_get_dwz_file (void)
2394 struct cleanup *cleanup;
2395 const char *filename;
2396 struct dwz_file *result;
2397 bfd_size_type buildid_len_arg;
2401 if (dwarf2_per_objfile->dwz_file != NULL)
2402 return dwarf2_per_objfile->dwz_file;
2404 bfd_set_error (bfd_error_no_error);
2405 data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd,
2406 &buildid_len_arg, &buildid);
2409 if (bfd_get_error () == bfd_error_no_error)
2411 error (_("could not read '.gnu_debugaltlink' section: %s"),
2412 bfd_errmsg (bfd_get_error ()));
2414 cleanup = make_cleanup (xfree, data);
2415 make_cleanup (xfree, buildid);
2417 buildid_len = (size_t) buildid_len_arg;
2419 filename = (const char *) data;
2420 if (!IS_ABSOLUTE_PATH (filename))
2422 char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile));
2425 make_cleanup (xfree, abs);
2426 abs = ldirname (abs);
2427 make_cleanup (xfree, abs);
2429 rel = concat (abs, SLASH_STRING, filename, (char *) NULL);
2430 make_cleanup (xfree, rel);
2434 /* First try the file name given in the section. If that doesn't
2435 work, try to use the build-id instead. */
2436 dwz_bfd = gdb_bfd_open (filename, gnutarget, -1);
2437 if (dwz_bfd != NULL)
2439 if (!build_id_verify (dwz_bfd, buildid_len, buildid))
2441 gdb_bfd_unref (dwz_bfd);
2446 if (dwz_bfd == NULL)
2447 dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid);
2449 if (dwz_bfd == NULL)
2450 error (_("could not find '.gnu_debugaltlink' file for %s"),
2451 objfile_name (dwarf2_per_objfile->objfile));
2453 result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack,
2455 result->dwz_bfd = dwz_bfd;
2457 bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result);
2459 do_cleanups (cleanup);
2461 gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd);
2462 dwarf2_per_objfile->dwz_file = result;
2466 /* DWARF quick_symbols_functions support. */
2468 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2469 unique line tables, so we maintain a separate table of all .debug_line
2470 derived entries to support the sharing.
2471 All the quick functions need is the list of file names. We discard the
2472 line_header when we're done and don't need to record it here. */
2473 struct quick_file_names
2475 /* The data used to construct the hash key. */
2476 struct stmt_list_hash hash;
2478 /* The number of entries in file_names, real_names. */
2479 unsigned int num_file_names;
2481 /* The file names from the line table, after being run through
2483 const char **file_names;
2485 /* The file names from the line table after being run through
2486 gdb_realpath. These are computed lazily. */
2487 const char **real_names;
2490 /* When using the index (and thus not using psymtabs), each CU has an
2491 object of this type. This is used to hold information needed by
2492 the various "quick" methods. */
2493 struct dwarf2_per_cu_quick_data
2495 /* The file table. This can be NULL if there was no file table
2496 or it's currently not read in.
2497 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2498 struct quick_file_names *file_names;
2500 /* The corresponding symbol table. This is NULL if symbols for this
2501 CU have not yet been read. */
2502 struct symtab *symtab;
2504 /* A temporary mark bit used when iterating over all CUs in
2505 expand_symtabs_matching. */
2506 unsigned int mark : 1;
2508 /* True if we've tried to read the file table and found there isn't one.
2509 There will be no point in trying to read it again next time. */
2510 unsigned int no_file_data : 1;
2513 /* Utility hash function for a stmt_list_hash. */
2516 hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash)
2520 if (stmt_list_hash->dwo_unit != NULL)
2521 v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file;
2522 v += stmt_list_hash->line_offset.sect_off;
2526 /* Utility equality function for a stmt_list_hash. */
2529 eq_stmt_list_entry (const struct stmt_list_hash *lhs,
2530 const struct stmt_list_hash *rhs)
2532 if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL))
2534 if (lhs->dwo_unit != NULL
2535 && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file)
2538 return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
2541 /* Hash function for a quick_file_names. */
2544 hash_file_name_entry (const void *e)
2546 const struct quick_file_names *file_data = e;
2548 return hash_stmt_list_entry (&file_data->hash);
2551 /* Equality function for a quick_file_names. */
2554 eq_file_name_entry (const void *a, const void *b)
2556 const struct quick_file_names *ea = a;
2557 const struct quick_file_names *eb = b;
2559 return eq_stmt_list_entry (&ea->hash, &eb->hash);
2562 /* Delete function for a quick_file_names. */
2565 delete_file_name_entry (void *e)
2567 struct quick_file_names *file_data = e;
2570 for (i = 0; i < file_data->num_file_names; ++i)
2572 xfree ((void*) file_data->file_names[i]);
2573 if (file_data->real_names)
2574 xfree ((void*) file_data->real_names[i]);
2577 /* The space for the struct itself lives on objfile_obstack,
2578 so we don't free it here. */
2581 /* Create a quick_file_names hash table. */
2584 create_quick_file_names_table (unsigned int nr_initial_entries)
2586 return htab_create_alloc (nr_initial_entries,
2587 hash_file_name_entry, eq_file_name_entry,
2588 delete_file_name_entry, xcalloc, xfree);
2591 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2592 have to be created afterwards. You should call age_cached_comp_units after
2593 processing PER_CU->CU. dw2_setup must have been already called. */
2596 load_cu (struct dwarf2_per_cu_data *per_cu)
2598 if (per_cu->is_debug_types)
2599 load_full_type_unit (per_cu);
2601 load_full_comp_unit (per_cu, language_minimal);
2603 gdb_assert (per_cu->cu != NULL);
2605 dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu);
2608 /* Read in the symbols for PER_CU. */
2611 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2613 struct cleanup *back_to;
2615 /* Skip type_unit_groups, reading the type units they contain
2616 is handled elsewhere. */
2617 if (IS_TYPE_UNIT_GROUP (per_cu))
2620 back_to = make_cleanup (dwarf2_release_queue, NULL);
2622 if (dwarf2_per_objfile->using_index
2623 ? per_cu->v.quick->symtab == NULL
2624 : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin))
2626 queue_comp_unit (per_cu, language_minimal);
2629 /* If we just loaded a CU from a DWO, and we're working with an index
2630 that may badly handle TUs, load all the TUs in that DWO as well.
2631 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2632 if (!per_cu->is_debug_types
2633 && per_cu->cu->dwo_unit != NULL
2634 && dwarf2_per_objfile->index_table != NULL
2635 && dwarf2_per_objfile->index_table->version <= 7
2636 /* DWP files aren't supported yet. */
2637 && get_dwp_file () == NULL)
2638 queue_and_load_all_dwo_tus (per_cu);
2643 /* Age the cache, releasing compilation units that have not
2644 been used recently. */
2645 age_cached_comp_units ();
2647 do_cleanups (back_to);
2650 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2651 the objfile from which this CU came. Returns the resulting symbol
2654 static struct symtab *
2655 dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2657 gdb_assert (dwarf2_per_objfile->using_index);
2658 if (!per_cu->v.quick->symtab)
2660 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
2661 increment_reading_symtab ();
2662 dw2_do_instantiate_symtab (per_cu);
2663 process_cu_includes ();
2664 do_cleanups (back_to);
2666 return per_cu->v.quick->symtab;
2669 /* Return the CU/TU given its index.
2671 This is intended for loops like:
2673 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2674 + dwarf2_per_objfile->n_type_units); ++i)
2676 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2682 static struct dwarf2_per_cu_data *
2683 dw2_get_cutu (int index)
2685 if (index >= dwarf2_per_objfile->n_comp_units)
2687 index -= dwarf2_per_objfile->n_comp_units;
2688 gdb_assert (index < dwarf2_per_objfile->n_type_units);
2689 return &dwarf2_per_objfile->all_type_units[index]->per_cu;
2692 return dwarf2_per_objfile->all_comp_units[index];
2695 /* Return the CU given its index.
2696 This differs from dw2_get_cutu in that it's for when you know INDEX
2699 static struct dwarf2_per_cu_data *
2700 dw2_get_cu (int index)
2702 gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units);
2704 return dwarf2_per_objfile->all_comp_units[index];
2707 /* A helper for create_cus_from_index that handles a given list of
2711 create_cus_from_index_list (struct objfile *objfile,
2712 const gdb_byte *cu_list, offset_type n_elements,
2713 struct dwarf2_section_info *section,
2719 for (i = 0; i < n_elements; i += 2)
2721 struct dwarf2_per_cu_data *the_cu;
2722 ULONGEST offset, length;
2724 gdb_static_assert (sizeof (ULONGEST) >= 8);
2725 offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE);
2726 length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE);
2729 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2730 struct dwarf2_per_cu_data);
2731 the_cu->offset.sect_off = offset;
2732 the_cu->length = length;
2733 the_cu->objfile = objfile;
2734 the_cu->section = section;
2735 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2736 struct dwarf2_per_cu_quick_data);
2737 the_cu->is_dwz = is_dwz;
2738 dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu;
2742 /* Read the CU list from the mapped index, and use it to create all
2743 the CU objects for this objfile. */
2746 create_cus_from_index (struct objfile *objfile,
2747 const gdb_byte *cu_list, offset_type cu_list_elements,
2748 const gdb_byte *dwz_list, offset_type dwz_elements)
2750 struct dwz_file *dwz;
2752 dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2;
2753 dwarf2_per_objfile->all_comp_units
2754 = obstack_alloc (&objfile->objfile_obstack,
2755 dwarf2_per_objfile->n_comp_units
2756 * sizeof (struct dwarf2_per_cu_data *));
2758 create_cus_from_index_list (objfile, cu_list, cu_list_elements,
2759 &dwarf2_per_objfile->info, 0, 0);
2761 if (dwz_elements == 0)
2764 dwz = dwarf2_get_dwz_file ();
2765 create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1,
2766 cu_list_elements / 2);
2769 /* Create the signatured type hash table from the index. */
2772 create_signatured_type_table_from_index (struct objfile *objfile,
2773 struct dwarf2_section_info *section,
2774 const gdb_byte *bytes,
2775 offset_type elements)
2778 htab_t sig_types_hash;
2780 dwarf2_per_objfile->n_type_units
2781 = dwarf2_per_objfile->n_allocated_type_units
2783 dwarf2_per_objfile->all_type_units
2784 = xmalloc (dwarf2_per_objfile->n_type_units
2785 * sizeof (struct signatured_type *));
2787 sig_types_hash = allocate_signatured_type_table (objfile);
2789 for (i = 0; i < elements; i += 3)
2791 struct signatured_type *sig_type;
2792 ULONGEST offset, type_offset_in_tu, signature;
2795 gdb_static_assert (sizeof (ULONGEST) >= 8);
2796 offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
2797 type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8,
2799 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
2802 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2803 struct signatured_type);
2804 sig_type->signature = signature;
2805 sig_type->type_offset_in_tu.cu_off = type_offset_in_tu;
2806 sig_type->per_cu.is_debug_types = 1;
2807 sig_type->per_cu.section = section;
2808 sig_type->per_cu.offset.sect_off = offset;
2809 sig_type->per_cu.objfile = objfile;
2810 sig_type->per_cu.v.quick
2811 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2812 struct dwarf2_per_cu_quick_data);
2814 slot = htab_find_slot (sig_types_hash, sig_type, INSERT);
2817 dwarf2_per_objfile->all_type_units[i / 3] = sig_type;
2820 dwarf2_per_objfile->signatured_types = sig_types_hash;
2823 /* Read the address map data from the mapped index, and use it to
2824 populate the objfile's psymtabs_addrmap. */
2827 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
2829 const gdb_byte *iter, *end;
2830 struct obstack temp_obstack;
2831 struct addrmap *mutable_map;
2832 struct cleanup *cleanup;
2835 obstack_init (&temp_obstack);
2836 cleanup = make_cleanup_obstack_free (&temp_obstack);
2837 mutable_map = addrmap_create_mutable (&temp_obstack);
2839 iter = index->address_table;
2840 end = iter + index->address_table_size;
2842 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2846 ULONGEST hi, lo, cu_index;
2847 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2849 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2851 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
2856 complaint (&symfile_complaints,
2857 _(".gdb_index address table has invalid range (%s - %s)"),
2858 hex_string (lo), hex_string (hi));
2862 if (cu_index >= dwarf2_per_objfile->n_comp_units)
2864 complaint (&symfile_complaints,
2865 _(".gdb_index address table has invalid CU number %u"),
2866 (unsigned) cu_index);
2870 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
2871 dw2_get_cutu (cu_index));
2874 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
2875 &objfile->objfile_obstack);
2876 do_cleanups (cleanup);
2879 /* The hash function for strings in the mapped index. This is the same as
2880 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2881 implementation. This is necessary because the hash function is tied to the
2882 format of the mapped index file. The hash values do not have to match with
2885 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2888 mapped_index_string_hash (int index_version, const void *p)
2890 const unsigned char *str = (const unsigned char *) p;
2894 while ((c = *str++) != 0)
2896 if (index_version >= 5)
2898 r = r * 67 + c - 113;
2904 /* Find a slot in the mapped index INDEX for the object named NAME.
2905 If NAME is found, set *VEC_OUT to point to the CU vector in the
2906 constant pool and return 1. If NAME cannot be found, return 0. */
2909 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
2910 offset_type **vec_out)
2912 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2914 offset_type slot, step;
2915 int (*cmp) (const char *, const char *);
2917 if (current_language->la_language == language_cplus
2918 || current_language->la_language == language_java
2919 || current_language->la_language == language_fortran)
2921 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2923 const char *paren = strchr (name, '(');
2929 dup = xmalloc (paren - name + 1);
2930 memcpy (dup, name, paren - name);
2931 dup[paren - name] = 0;
2933 make_cleanup (xfree, dup);
2938 /* Index version 4 did not support case insensitive searches. But the
2939 indices for case insensitive languages are built in lowercase, therefore
2940 simulate our NAME being searched is also lowercased. */
2941 hash = mapped_index_string_hash ((index->version == 4
2942 && case_sensitivity == case_sensitive_off
2943 ? 5 : index->version),
2946 slot = hash & (index->symbol_table_slots - 1);
2947 step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1;
2948 cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp);
2952 /* Convert a slot number to an offset into the table. */
2953 offset_type i = 2 * slot;
2955 if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0)
2957 do_cleanups (back_to);
2961 str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]);
2962 if (!cmp (name, str))
2964 *vec_out = (offset_type *) (index->constant_pool
2965 + MAYBE_SWAP (index->symbol_table[i + 1]));
2966 do_cleanups (back_to);
2970 slot = (slot + step) & (index->symbol_table_slots - 1);
2974 /* A helper function that reads the .gdb_index from SECTION and fills
2975 in MAP. FILENAME is the name of the file containing the section;
2976 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2977 ok to use deprecated sections.
2979 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2980 out parameters that are filled in with information about the CU and
2981 TU lists in the section.
2983 Returns 1 if all went well, 0 otherwise. */
2986 read_index_from_section (struct objfile *objfile,
2987 const char *filename,
2989 struct dwarf2_section_info *section,
2990 struct mapped_index *map,
2991 const gdb_byte **cu_list,
2992 offset_type *cu_list_elements,
2993 const gdb_byte **types_list,
2994 offset_type *types_list_elements)
2996 const gdb_byte *addr;
2997 offset_type version;
2998 offset_type *metadata;
3001 if (dwarf2_section_empty_p (section))
3004 /* Older elfutils strip versions could keep the section in the main
3005 executable while splitting it for the separate debug info file. */
3006 if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0)
3009 dwarf2_read_section (objfile, section);
3011 addr = section->buffer;
3012 /* Version check. */
3013 version = MAYBE_SWAP (*(offset_type *) addr);
3014 /* Versions earlier than 3 emitted every copy of a psymbol. This
3015 causes the index to behave very poorly for certain requests. Version 3
3016 contained incomplete addrmap. So, it seems better to just ignore such
3020 static int warning_printed = 0;
3021 if (!warning_printed)
3023 warning (_("Skipping obsolete .gdb_index section in %s."),
3025 warning_printed = 1;
3029 /* Index version 4 uses a different hash function than index version
3032 Versions earlier than 6 did not emit psymbols for inlined
3033 functions. Using these files will cause GDB not to be able to
3034 set breakpoints on inlined functions by name, so we ignore these
3035 indices unless the user has done
3036 "set use-deprecated-index-sections on". */
3037 if (version < 6 && !deprecated_ok)
3039 static int warning_printed = 0;
3040 if (!warning_printed)
3043 Skipping deprecated .gdb_index section in %s.\n\
3044 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3045 to use the section anyway."),
3047 warning_printed = 1;
3051 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3052 of the TU (for symbols coming from TUs),
3053 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3054 Plus gold-generated indices can have duplicate entries for global symbols,
3055 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3056 These are just performance bugs, and we can't distinguish gdb-generated
3057 indices from gold-generated ones, so issue no warning here. */
3059 /* Indexes with higher version than the one supported by GDB may be no
3060 longer backward compatible. */
3064 map->version = version;
3065 map->total_size = section->size;
3067 metadata = (offset_type *) (addr + sizeof (offset_type));
3070 *cu_list = addr + MAYBE_SWAP (metadata[i]);
3071 *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
3075 *types_list = addr + MAYBE_SWAP (metadata[i]);
3076 *types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
3077 - MAYBE_SWAP (metadata[i]))
3081 map->address_table = addr + MAYBE_SWAP (metadata[i]);
3082 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
3083 - MAYBE_SWAP (metadata[i]));
3086 map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
3087 map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1])
3088 - MAYBE_SWAP (metadata[i]))
3089 / (2 * sizeof (offset_type)));
3092 map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i]));
3098 /* Read the index file. If everything went ok, initialize the "quick"
3099 elements of all the CUs and return 1. Otherwise, return 0. */
3102 dwarf2_read_index (struct objfile *objfile)
3104 struct mapped_index local_map, *map;
3105 const gdb_byte *cu_list, *types_list, *dwz_list = NULL;
3106 offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0;
3107 struct dwz_file *dwz;
3109 if (!read_index_from_section (objfile, objfile_name (objfile),
3110 use_deprecated_index_sections,
3111 &dwarf2_per_objfile->gdb_index, &local_map,
3112 &cu_list, &cu_list_elements,
3113 &types_list, &types_list_elements))
3116 /* Don't use the index if it's empty. */
3117 if (local_map.symbol_table_slots == 0)
3120 /* If there is a .dwz file, read it so we can get its CU list as
3122 dwz = dwarf2_get_dwz_file ();
3125 struct mapped_index dwz_map;
3126 const gdb_byte *dwz_types_ignore;
3127 offset_type dwz_types_elements_ignore;
3129 if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd),
3131 &dwz->gdb_index, &dwz_map,
3132 &dwz_list, &dwz_list_elements,
3134 &dwz_types_elements_ignore))
3136 warning (_("could not read '.gdb_index' section from %s; skipping"),
3137 bfd_get_filename (dwz->dwz_bfd));
3142 create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list,
3145 if (types_list_elements)
3147 struct dwarf2_section_info *section;
3149 /* We can only handle a single .debug_types when we have an
3151 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1)
3154 section = VEC_index (dwarf2_section_info_def,
3155 dwarf2_per_objfile->types, 0);
3157 create_signatured_type_table_from_index (objfile, section, types_list,
3158 types_list_elements);
3161 create_addrmap_from_index (objfile, &local_map);
3163 map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index));
3166 dwarf2_per_objfile->index_table = map;
3167 dwarf2_per_objfile->using_index = 1;
3168 dwarf2_per_objfile->quick_file_names_table =
3169 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
3174 /* A helper for the "quick" functions which sets the global
3175 dwarf2_per_objfile according to OBJFILE. */
3178 dw2_setup (struct objfile *objfile)
3180 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
3181 gdb_assert (dwarf2_per_objfile);
3184 /* die_reader_func for dw2_get_file_names. */
3187 dw2_get_file_names_reader (const struct die_reader_specs *reader,
3188 const gdb_byte *info_ptr,
3189 struct die_info *comp_unit_die,
3193 struct dwarf2_cu *cu = reader->cu;
3194 struct dwarf2_per_cu_data *this_cu = cu->per_cu;
3195 struct objfile *objfile = dwarf2_per_objfile->objfile;
3196 struct dwarf2_per_cu_data *lh_cu;
3197 struct line_header *lh;
3198 struct attribute *attr;
3200 const char *name, *comp_dir;
3202 struct quick_file_names *qfn;
3203 unsigned int line_offset;
3205 gdb_assert (! this_cu->is_debug_types);
3207 /* Our callers never want to match partial units -- instead they
3208 will match the enclosing full CU. */
3209 if (comp_unit_die->tag == DW_TAG_partial_unit)
3211 this_cu->v.quick->no_file_data = 1;
3220 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
3223 struct quick_file_names find_entry;
3225 line_offset = DW_UNSND (attr);
3227 /* We may have already read in this line header (TU line header sharing).
3228 If we have we're done. */
3229 find_entry.hash.dwo_unit = cu->dwo_unit;
3230 find_entry.hash.line_offset.sect_off = line_offset;
3231 slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
3232 &find_entry, INSERT);
3235 lh_cu->v.quick->file_names = *slot;
3239 lh = dwarf_decode_line_header (line_offset, cu);
3243 lh_cu->v.quick->no_file_data = 1;
3247 qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
3248 qfn->hash.dwo_unit = cu->dwo_unit;
3249 qfn->hash.line_offset.sect_off = line_offset;
3250 gdb_assert (slot != NULL);
3253 find_file_and_directory (comp_unit_die, cu, &name, &comp_dir);
3255 qfn->num_file_names = lh->num_file_names;
3256 qfn->file_names = obstack_alloc (&objfile->objfile_obstack,
3257 lh->num_file_names * sizeof (char *));
3258 for (i = 0; i < lh->num_file_names; ++i)
3259 qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir);
3260 qfn->real_names = NULL;
3262 free_line_header (lh);
3264 lh_cu->v.quick->file_names = qfn;
3267 /* A helper for the "quick" functions which attempts to read the line
3268 table for THIS_CU. */
3270 static struct quick_file_names *
3271 dw2_get_file_names (struct dwarf2_per_cu_data *this_cu)
3273 /* This should never be called for TUs. */
3274 gdb_assert (! this_cu->is_debug_types);
3275 /* Nor type unit groups. */
3276 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu));
3278 if (this_cu->v.quick->file_names != NULL)
3279 return this_cu->v.quick->file_names;
3280 /* If we know there is no line data, no point in looking again. */
3281 if (this_cu->v.quick->no_file_data)
3284 init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
3286 if (this_cu->v.quick->no_file_data)
3288 return this_cu->v.quick->file_names;
3291 /* A helper for the "quick" functions which computes and caches the
3292 real path for a given file name from the line table. */
3295 dw2_get_real_path (struct objfile *objfile,
3296 struct quick_file_names *qfn, int index)
3298 if (qfn->real_names == NULL)
3299 qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
3300 qfn->num_file_names, char *);
3302 if (qfn->real_names[index] == NULL)
3303 qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
3305 return qfn->real_names[index];
3308 static struct symtab *
3309 dw2_find_last_source_symtab (struct objfile *objfile)
3313 dw2_setup (objfile);
3314 index = dwarf2_per_objfile->n_comp_units - 1;
3315 return dw2_instantiate_symtab (dw2_get_cutu (index));
3318 /* Traversal function for dw2_forget_cached_source_info. */
3321 dw2_free_cached_file_names (void **slot, void *info)
3323 struct quick_file_names *file_data = (struct quick_file_names *) *slot;
3325 if (file_data->real_names)
3329 for (i = 0; i < file_data->num_file_names; ++i)
3331 xfree ((void*) file_data->real_names[i]);
3332 file_data->real_names[i] = NULL;
3340 dw2_forget_cached_source_info (struct objfile *objfile)
3342 dw2_setup (objfile);
3344 htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table,
3345 dw2_free_cached_file_names, NULL);
3348 /* Helper function for dw2_map_symtabs_matching_filename that expands
3349 the symtabs and calls the iterator. */
3352 dw2_map_expand_apply (struct objfile *objfile,
3353 struct dwarf2_per_cu_data *per_cu,
3354 const char *name, const char *real_path,
3355 int (*callback) (struct symtab *, void *),
3358 struct symtab *last_made = objfile->symtabs;
3360 /* Don't visit already-expanded CUs. */
3361 if (per_cu->v.quick->symtab)
3364 /* This may expand more than one symtab, and we want to iterate over
3366 dw2_instantiate_symtab (per_cu);
3368 return iterate_over_some_symtabs (name, real_path, callback, data,
3369 objfile->symtabs, last_made);
3372 /* Implementation of the map_symtabs_matching_filename method. */
3375 dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name,
3376 const char *real_path,
3377 int (*callback) (struct symtab *, void *),
3381 const char *name_basename = lbasename (name);
3383 dw2_setup (objfile);
3385 /* The rule is CUs specify all the files, including those used by
3386 any TU, so there's no need to scan TUs here. */
3388 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3391 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3392 struct quick_file_names *file_data;
3394 /* We only need to look at symtabs not already expanded. */
3395 if (per_cu->v.quick->symtab)
3398 file_data = dw2_get_file_names (per_cu);
3399 if (file_data == NULL)
3402 for (j = 0; j < file_data->num_file_names; ++j)
3404 const char *this_name = file_data->file_names[j];
3405 const char *this_real_name;
3407 if (compare_filenames_for_search (this_name, name))
3409 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3415 /* Before we invoke realpath, which can get expensive when many
3416 files are involved, do a quick comparison of the basenames. */
3417 if (! basenames_may_differ
3418 && FILENAME_CMP (lbasename (this_name), name_basename) != 0)
3421 this_real_name = dw2_get_real_path (objfile, file_data, j);
3422 if (compare_filenames_for_search (this_real_name, name))
3424 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3430 if (real_path != NULL)
3432 gdb_assert (IS_ABSOLUTE_PATH (real_path));
3433 gdb_assert (IS_ABSOLUTE_PATH (name));
3434 if (this_real_name != NULL
3435 && FILENAME_CMP (real_path, this_real_name) == 0)
3437 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3449 /* Struct used to manage iterating over all CUs looking for a symbol. */
3451 struct dw2_symtab_iterator
3453 /* The internalized form of .gdb_index. */
3454 struct mapped_index *index;
3455 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3456 int want_specific_block;
3457 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3458 Unused if !WANT_SPECIFIC_BLOCK. */
3460 /* The kind of symbol we're looking for. */
3462 /* The list of CUs from the index entry of the symbol,
3463 or NULL if not found. */
3465 /* The next element in VEC to look at. */
3467 /* The number of elements in VEC, or zero if there is no match. */
3469 /* Have we seen a global version of the symbol?
3470 If so we can ignore all further global instances.
3471 This is to work around gold/15646, inefficient gold-generated
3476 /* Initialize the index symtab iterator ITER.
3477 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3478 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3481 dw2_symtab_iter_init (struct dw2_symtab_iterator *iter,
3482 struct mapped_index *index,
3483 int want_specific_block,
3488 iter->index = index;
3489 iter->want_specific_block = want_specific_block;
3490 iter->block_index = block_index;
3491 iter->domain = domain;
3493 iter->global_seen = 0;
3495 if (find_slot_in_mapped_hash (index, name, &iter->vec))
3496 iter->length = MAYBE_SWAP (*iter->vec);
3504 /* Return the next matching CU or NULL if there are no more. */
3506 static struct dwarf2_per_cu_data *
3507 dw2_symtab_iter_next (struct dw2_symtab_iterator *iter)
3509 for ( ; iter->next < iter->length; ++iter->next)
3511 offset_type cu_index_and_attrs =
3512 MAYBE_SWAP (iter->vec[iter->next + 1]);
3513 offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3514 struct dwarf2_per_cu_data *per_cu;
3515 int want_static = iter->block_index != GLOBAL_BLOCK;
3516 /* This value is only valid for index versions >= 7. */
3517 int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
3518 gdb_index_symbol_kind symbol_kind =
3519 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3520 /* Only check the symbol attributes if they're present.
3521 Indices prior to version 7 don't record them,
3522 and indices >= 7 may elide them for certain symbols
3523 (gold does this). */
3525 (iter->index->version >= 7
3526 && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
3528 /* Don't crash on bad data. */
3529 if (cu_index >= (dwarf2_per_objfile->n_comp_units
3530 + dwarf2_per_objfile->n_type_units))
3532 complaint (&symfile_complaints,
3533 _(".gdb_index entry has bad CU index"
3535 objfile_name (dwarf2_per_objfile->objfile));
3539 per_cu = dw2_get_cutu (cu_index);
3541 /* Skip if already read in. */
3542 if (per_cu->v.quick->symtab)
3545 /* Check static vs global. */
3548 if (iter->want_specific_block
3549 && want_static != is_static)
3551 /* Work around gold/15646. */
3552 if (!is_static && iter->global_seen)
3555 iter->global_seen = 1;
3558 /* Only check the symbol's kind if it has one. */
3561 switch (iter->domain)
3564 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE
3565 && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION
3566 /* Some types are also in VAR_DOMAIN. */
3567 && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3571 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3575 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER)
3590 static struct symtab *
3591 dw2_lookup_symbol (struct objfile *objfile, int block_index,
3592 const char *name, domain_enum domain)
3594 struct symtab *stab_best = NULL;
3595 struct mapped_index *index;
3597 dw2_setup (objfile);
3599 index = dwarf2_per_objfile->index_table;
3601 /* index is NULL if OBJF_READNOW. */
3604 struct dw2_symtab_iterator iter;
3605 struct dwarf2_per_cu_data *per_cu;
3607 dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name);
3609 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3611 struct symbol *sym = NULL;
3612 struct symtab *stab = dw2_instantiate_symtab (per_cu);
3614 /* Some caution must be observed with overloaded functions
3615 and methods, since the index will not contain any overload
3616 information (but NAME might contain it). */
3619 struct blockvector *bv = BLOCKVECTOR (stab);
3620 struct block *block = BLOCKVECTOR_BLOCK (bv, block_index);
3622 sym = lookup_block_symbol (block, name, domain);
3625 if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0)
3627 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
3633 /* Keep looking through other CUs. */
3641 dw2_print_stats (struct objfile *objfile)
3643 int i, total, count;
3645 dw2_setup (objfile);
3646 total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units;
3648 for (i = 0; i < total; ++i)
3650 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
3652 if (!per_cu->v.quick->symtab)
3655 printf_filtered (_(" Number of read CUs: %d\n"), total - count);
3656 printf_filtered (_(" Number of unread CUs: %d\n"), count);
3659 /* This dumps minimal information about the index.
3660 It is called via "mt print objfiles".
3661 One use is to verify .gdb_index has been loaded by the
3662 gdb.dwarf2/gdb-index.exp testcase. */
3665 dw2_dump (struct objfile *objfile)
3667 dw2_setup (objfile);
3668 gdb_assert (dwarf2_per_objfile->using_index);
3669 printf_filtered (".gdb_index:");
3670 if (dwarf2_per_objfile->index_table != NULL)
3672 printf_filtered (" version %d\n",
3673 dwarf2_per_objfile->index_table->version);
3676 printf_filtered (" faked for \"readnow\"\n");
3677 printf_filtered ("\n");
3681 dw2_relocate (struct objfile *objfile,
3682 const struct section_offsets *new_offsets,
3683 const struct section_offsets *delta)
3685 /* There's nothing to relocate here. */
3689 dw2_expand_symtabs_for_function (struct objfile *objfile,
3690 const char *func_name)
3692 struct mapped_index *index;
3694 dw2_setup (objfile);
3696 index = dwarf2_per_objfile->index_table;
3698 /* index is NULL if OBJF_READNOW. */
3701 struct dw2_symtab_iterator iter;
3702 struct dwarf2_per_cu_data *per_cu;
3704 /* Note: It doesn't matter what we pass for block_index here. */
3705 dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN,
3708 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3709 dw2_instantiate_symtab (per_cu);
3714 dw2_expand_all_symtabs (struct objfile *objfile)
3718 dw2_setup (objfile);
3720 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3721 + dwarf2_per_objfile->n_type_units); ++i)
3723 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
3725 dw2_instantiate_symtab (per_cu);
3730 dw2_expand_symtabs_with_fullname (struct objfile *objfile,
3731 const char *fullname)
3735 dw2_setup (objfile);
3737 /* We don't need to consider type units here.
3738 This is only called for examining code, e.g. expand_line_sal.
3739 There can be an order of magnitude (or more) more type units
3740 than comp units, and we avoid them if we can. */
3742 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3745 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
3746 struct quick_file_names *file_data;
3748 /* We only need to look at symtabs not already expanded. */
3749 if (per_cu->v.quick->symtab)
3752 file_data = dw2_get_file_names (per_cu);
3753 if (file_data == NULL)
3756 for (j = 0; j < file_data->num_file_names; ++j)
3758 const char *this_fullname = file_data->file_names[j];
3760 if (filename_cmp (this_fullname, fullname) == 0)
3762 dw2_instantiate_symtab (per_cu);
3770 dw2_map_matching_symbols (struct objfile *objfile,
3771 const char * name, domain_enum namespace,
3773 int (*callback) (struct block *,
3774 struct symbol *, void *),
3775 void *data, symbol_compare_ftype *match,
3776 symbol_compare_ftype *ordered_compare)
3778 /* Currently unimplemented; used for Ada. The function can be called if the
3779 current language is Ada for a non-Ada objfile using GNU index. As Ada
3780 does not look for non-Ada symbols this function should just return. */
3784 dw2_expand_symtabs_matching
3785 (struct objfile *objfile,
3786 expand_symtabs_file_matcher_ftype *file_matcher,
3787 expand_symtabs_symbol_matcher_ftype *symbol_matcher,
3788 enum search_domain kind,
3793 struct mapped_index *index;
3795 dw2_setup (objfile);
3797 /* index_table is NULL if OBJF_READNOW. */
3798 if (!dwarf2_per_objfile->index_table)
3800 index = dwarf2_per_objfile->index_table;
3802 if (file_matcher != NULL)
3804 struct cleanup *cleanup;
3805 htab_t visited_found, visited_not_found;
3807 visited_found = htab_create_alloc (10,
3808 htab_hash_pointer, htab_eq_pointer,
3809 NULL, xcalloc, xfree);
3810 cleanup = make_cleanup_htab_delete (visited_found);
3811 visited_not_found = htab_create_alloc (10,
3812 htab_hash_pointer, htab_eq_pointer,
3813 NULL, xcalloc, xfree);
3814 make_cleanup_htab_delete (visited_not_found);
3816 /* The rule is CUs specify all the files, including those used by
3817 any TU, so there's no need to scan TUs here. */
3819 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3822 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3823 struct quick_file_names *file_data;
3826 per_cu->v.quick->mark = 0;
3828 /* We only need to look at symtabs not already expanded. */
3829 if (per_cu->v.quick->symtab)
3832 file_data = dw2_get_file_names (per_cu);
3833 if (file_data == NULL)
3836 if (htab_find (visited_not_found, file_data) != NULL)
3838 else if (htab_find (visited_found, file_data) != NULL)
3840 per_cu->v.quick->mark = 1;
3844 for (j = 0; j < file_data->num_file_names; ++j)
3846 const char *this_real_name;
3848 if (file_matcher (file_data->file_names[j], data, 0))
3850 per_cu->v.quick->mark = 1;
3854 /* Before we invoke realpath, which can get expensive when many
3855 files are involved, do a quick comparison of the basenames. */
3856 if (!basenames_may_differ
3857 && !file_matcher (lbasename (file_data->file_names[j]),
3861 this_real_name = dw2_get_real_path (objfile, file_data, j);
3862 if (file_matcher (this_real_name, data, 0))
3864 per_cu->v.quick->mark = 1;
3869 slot = htab_find_slot (per_cu->v.quick->mark
3871 : visited_not_found,
3876 do_cleanups (cleanup);
3879 for (iter = 0; iter < index->symbol_table_slots; ++iter)
3881 offset_type idx = 2 * iter;
3883 offset_type *vec, vec_len, vec_idx;
3884 int global_seen = 0;
3886 if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
3889 name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
3891 if (! (*symbol_matcher) (name, data))
3894 /* The name was matched, now expand corresponding CUs that were
3896 vec = (offset_type *) (index->constant_pool
3897 + MAYBE_SWAP (index->symbol_table[idx + 1]));
3898 vec_len = MAYBE_SWAP (vec[0]);
3899 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
3901 struct dwarf2_per_cu_data *per_cu;
3902 offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]);
3903 /* This value is only valid for index versions >= 7. */
3904 int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
3905 gdb_index_symbol_kind symbol_kind =
3906 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3907 int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3908 /* Only check the symbol attributes if they're present.
3909 Indices prior to version 7 don't record them,
3910 and indices >= 7 may elide them for certain symbols
3911 (gold does this). */
3913 (index->version >= 7
3914 && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
3916 /* Work around gold/15646. */
3919 if (!is_static && global_seen)
3925 /* Only check the symbol's kind if it has one. */
3930 case VARIABLES_DOMAIN:
3931 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE)
3934 case FUNCTIONS_DOMAIN:
3935 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION)
3939 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3947 /* Don't crash on bad data. */
3948 if (cu_index >= (dwarf2_per_objfile->n_comp_units
3949 + dwarf2_per_objfile->n_type_units))
3951 complaint (&symfile_complaints,
3952 _(".gdb_index entry has bad CU index"
3953 " [in module %s]"), objfile_name (objfile));
3957 per_cu = dw2_get_cutu (cu_index);
3958 if (file_matcher == NULL || per_cu->v.quick->mark)
3959 dw2_instantiate_symtab (per_cu);
3964 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3967 static struct symtab *
3968 recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc)
3972 if (BLOCKVECTOR (symtab) != NULL
3973 && blockvector_contains_pc (BLOCKVECTOR (symtab), pc))
3976 if (symtab->includes == NULL)
3979 for (i = 0; symtab->includes[i]; ++i)
3981 struct symtab *s = symtab->includes[i];
3983 s = recursively_find_pc_sect_symtab (s, pc);
3991 static struct symtab *
3992 dw2_find_pc_sect_symtab (struct objfile *objfile,
3993 struct bound_minimal_symbol msymbol,
3995 struct obj_section *section,
3998 struct dwarf2_per_cu_data *data;
3999 struct symtab *result;
4001 dw2_setup (objfile);
4003 if (!objfile->psymtabs_addrmap)
4006 data = addrmap_find (objfile->psymtabs_addrmap, pc);
4010 if (warn_if_readin && data->v.quick->symtab)
4011 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4012 paddress (get_objfile_arch (objfile), pc));
4014 result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc);
4015 gdb_assert (result != NULL);
4020 dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun,
4021 void *data, int need_fullname)
4024 struct cleanup *cleanup;
4025 htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer,
4026 NULL, xcalloc, xfree);
4028 cleanup = make_cleanup_htab_delete (visited);
4029 dw2_setup (objfile);
4031 /* The rule is CUs specify all the files, including those used by
4032 any TU, so there's no need to scan TUs here.
4033 We can ignore file names coming from already-expanded CUs. */
4035 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
4037 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
4039 if (per_cu->v.quick->symtab)
4041 void **slot = htab_find_slot (visited, per_cu->v.quick->file_names,
4044 *slot = per_cu->v.quick->file_names;
4048 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
4051 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
4052 struct quick_file_names *file_data;
4055 /* We only need to look at symtabs not already expanded. */
4056 if (per_cu->v.quick->symtab)
4059 file_data = dw2_get_file_names (per_cu);
4060 if (file_data == NULL)
4063 slot = htab_find_slot (visited, file_data, INSERT);
4066 /* Already visited. */
4071 for (j = 0; j < file_data->num_file_names; ++j)
4073 const char *this_real_name;
4076 this_real_name = dw2_get_real_path (objfile, file_data, j);
4078 this_real_name = NULL;
4079 (*fun) (file_data->file_names[j], this_real_name, data);
4083 do_cleanups (cleanup);
4087 dw2_has_symbols (struct objfile *objfile)
4092 const struct quick_symbol_functions dwarf2_gdb_index_functions =
4095 dw2_find_last_source_symtab,
4096 dw2_forget_cached_source_info,
4097 dw2_map_symtabs_matching_filename,
4102 dw2_expand_symtabs_for_function,
4103 dw2_expand_all_symtabs,
4104 dw2_expand_symtabs_with_fullname,
4105 dw2_map_matching_symbols,
4106 dw2_expand_symtabs_matching,
4107 dw2_find_pc_sect_symtab,
4108 dw2_map_symbol_filenames
4111 /* Initialize for reading DWARF for this objfile. Return 0 if this
4112 file will use psymtabs, or 1 if using the GNU index. */
4115 dwarf2_initialize_objfile (struct objfile *objfile)
4117 /* If we're about to read full symbols, don't bother with the
4118 indices. In this case we also don't care if some other debug
4119 format is making psymtabs, because they are all about to be
4121 if ((objfile->flags & OBJF_READNOW))
4125 dwarf2_per_objfile->using_index = 1;
4126 create_all_comp_units (objfile);
4127 create_all_type_units (objfile);
4128 dwarf2_per_objfile->quick_file_names_table =
4129 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
4131 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
4132 + dwarf2_per_objfile->n_type_units); ++i)
4134 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
4136 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4137 struct dwarf2_per_cu_quick_data);
4140 /* Return 1 so that gdb sees the "quick" functions. However,
4141 these functions will be no-ops because we will have expanded
4146 if (dwarf2_read_index (objfile))
4154 /* Build a partial symbol table. */
4157 dwarf2_build_psymtabs (struct objfile *objfile)
4159 volatile struct gdb_exception except;
4161 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
4163 init_psymbol_list (objfile, 1024);
4166 TRY_CATCH (except, RETURN_MASK_ERROR)
4168 /* This isn't really ideal: all the data we allocate on the
4169 objfile's obstack is still uselessly kept around. However,
4170 freeing it seems unsafe. */
4171 struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile);
4173 dwarf2_build_psymtabs_hard (objfile);
4174 discard_cleanups (cleanups);
4176 if (except.reason < 0)
4177 exception_print (gdb_stderr, except);
4180 /* Return the total length of the CU described by HEADER. */
4183 get_cu_length (const struct comp_unit_head *header)
4185 return header->initial_length_size + header->length;
4188 /* Return TRUE if OFFSET is within CU_HEADER. */
4191 offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset)
4193 sect_offset bottom = { cu_header->offset.sect_off };
4194 sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) };
4196 return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off);
4199 /* Find the base address of the compilation unit for range lists and
4200 location lists. It will normally be specified by DW_AT_low_pc.
4201 In DWARF-3 draft 4, the base address could be overridden by
4202 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4203 compilation units with discontinuous ranges. */
4206 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
4208 struct attribute *attr;
4211 cu->base_address = 0;
4213 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
4216 cu->base_address = attr_value_as_address (attr);
4221 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4224 cu->base_address = attr_value_as_address (attr);
4230 /* Read in the comp unit header information from the debug_info at info_ptr.
4231 NOTE: This leaves members offset, first_die_offset to be filled in
4234 static const gdb_byte *
4235 read_comp_unit_head (struct comp_unit_head *cu_header,
4236 const gdb_byte *info_ptr, bfd *abfd)
4239 unsigned int bytes_read;
4241 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
4242 cu_header->initial_length_size = bytes_read;
4243 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
4244 info_ptr += bytes_read;
4245 cu_header->version = read_2_bytes (abfd, info_ptr);
4247 cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header,
4249 info_ptr += bytes_read;
4250 cu_header->addr_size = read_1_byte (abfd, info_ptr);
4252 signed_addr = bfd_get_sign_extend_vma (abfd);
4253 if (signed_addr < 0)
4254 internal_error (__FILE__, __LINE__,
4255 _("read_comp_unit_head: dwarf from non elf file"));
4256 cu_header->signed_addr_p = signed_addr;
4261 /* Helper function that returns the proper abbrev section for
4264 static struct dwarf2_section_info *
4265 get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu)
4267 struct dwarf2_section_info *abbrev;
4269 if (this_cu->is_dwz)
4270 abbrev = &dwarf2_get_dwz_file ()->abbrev;
4272 abbrev = &dwarf2_per_objfile->abbrev;
4277 /* Subroutine of read_and_check_comp_unit_head and
4278 read_and_check_type_unit_head to simplify them.
4279 Perform various error checking on the header. */
4282 error_check_comp_unit_head (struct comp_unit_head *header,
4283 struct dwarf2_section_info *section,
4284 struct dwarf2_section_info *abbrev_section)
4286 bfd *abfd = get_section_bfd_owner (section);
4287 const char *filename = get_section_file_name (section);
4289 if (header->version != 2 && header->version != 3 && header->version != 4)
4290 error (_("Dwarf Error: wrong version in compilation unit header "
4291 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
4294 if (header->abbrev_offset.sect_off
4295 >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section))
4296 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4297 "(offset 0x%lx + 6) [in module %s]"),
4298 (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off,
4301 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4302 avoid potential 32-bit overflow. */
4303 if (((unsigned long) header->offset.sect_off + get_cu_length (header))
4305 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4306 "(offset 0x%lx + 0) [in module %s]"),
4307 (long) header->length, (long) header->offset.sect_off,
4311 /* Read in a CU/TU header and perform some basic error checking.
4312 The contents of the header are stored in HEADER.
4313 The result is a pointer to the start of the first DIE. */
4315 static const gdb_byte *
4316 read_and_check_comp_unit_head (struct comp_unit_head *header,
4317 struct dwarf2_section_info *section,
4318 struct dwarf2_section_info *abbrev_section,
4319 const gdb_byte *info_ptr,
4320 int is_debug_types_section)
4322 const gdb_byte *beg_of_comp_unit = info_ptr;
4323 bfd *abfd = get_section_bfd_owner (section);
4325 header->offset.sect_off = beg_of_comp_unit - section->buffer;
4327 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
4329 /* If we're reading a type unit, skip over the signature and
4330 type_offset fields. */
4331 if (is_debug_types_section)
4332 info_ptr += 8 /*signature*/ + header->offset_size;
4334 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4336 error_check_comp_unit_head (header, section, abbrev_section);
4341 /* Read in the types comp unit header information from .debug_types entry at
4342 types_ptr. The result is a pointer to one past the end of the header. */
4344 static const gdb_byte *
4345 read_and_check_type_unit_head (struct comp_unit_head *header,
4346 struct dwarf2_section_info *section,
4347 struct dwarf2_section_info *abbrev_section,
4348 const gdb_byte *info_ptr,
4349 ULONGEST *signature,
4350 cu_offset *type_offset_in_tu)
4352 const gdb_byte *beg_of_comp_unit = info_ptr;
4353 bfd *abfd = get_section_bfd_owner (section);
4355 header->offset.sect_off = beg_of_comp_unit - section->buffer;
4357 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
4359 /* If we're reading a type unit, skip over the signature and
4360 type_offset fields. */
4361 if (signature != NULL)
4362 *signature = read_8_bytes (abfd, info_ptr);
4364 if (type_offset_in_tu != NULL)
4365 type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr,
4366 header->offset_size);
4367 info_ptr += header->offset_size;
4369 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4371 error_check_comp_unit_head (header, section, abbrev_section);
4376 /* Fetch the abbreviation table offset from a comp or type unit header. */
4379 read_abbrev_offset (struct dwarf2_section_info *section,
4382 bfd *abfd = get_section_bfd_owner (section);
4383 const gdb_byte *info_ptr;
4384 unsigned int length, initial_length_size, offset_size;
4385 sect_offset abbrev_offset;
4387 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
4388 info_ptr = section->buffer + offset.sect_off;
4389 length = read_initial_length (abfd, info_ptr, &initial_length_size);
4390 offset_size = initial_length_size == 4 ? 4 : 8;
4391 info_ptr += initial_length_size + 2 /*version*/;
4392 abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size);
4393 return abbrev_offset;
4396 /* Allocate a new partial symtab for file named NAME and mark this new
4397 partial symtab as being an include of PST. */
4400 dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst,
4401 struct objfile *objfile)
4403 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
4405 if (!IS_ABSOLUTE_PATH (subpst->filename))
4407 /* It shares objfile->objfile_obstack. */
4408 subpst->dirname = pst->dirname;
4411 subpst->section_offsets = pst->section_offsets;
4412 subpst->textlow = 0;
4413 subpst->texthigh = 0;
4415 subpst->dependencies = (struct partial_symtab **)
4416 obstack_alloc (&objfile->objfile_obstack,
4417 sizeof (struct partial_symtab *));
4418 subpst->dependencies[0] = pst;
4419 subpst->number_of_dependencies = 1;
4421 subpst->globals_offset = 0;
4422 subpst->n_global_syms = 0;
4423 subpst->statics_offset = 0;
4424 subpst->n_static_syms = 0;
4425 subpst->symtab = NULL;
4426 subpst->read_symtab = pst->read_symtab;
4429 /* No private part is necessary for include psymtabs. This property
4430 can be used to differentiate between such include psymtabs and
4431 the regular ones. */
4432 subpst->read_symtab_private = NULL;
4435 /* Read the Line Number Program data and extract the list of files
4436 included by the source file represented by PST. Build an include
4437 partial symtab for each of these included files. */
4440 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
4441 struct die_info *die,
4442 struct partial_symtab *pst)
4444 struct line_header *lh = NULL;
4445 struct attribute *attr;
4447 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
4449 lh = dwarf_decode_line_header (DW_UNSND (attr), cu);
4451 return; /* No linetable, so no includes. */
4453 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4454 dwarf_decode_lines (lh, pst->dirname, cu, pst, 1);
4456 free_line_header (lh);
4460 hash_signatured_type (const void *item)
4462 const struct signatured_type *sig_type = item;
4464 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4465 return sig_type->signature;
4469 eq_signatured_type (const void *item_lhs, const void *item_rhs)
4471 const struct signatured_type *lhs = item_lhs;
4472 const struct signatured_type *rhs = item_rhs;
4474 return lhs->signature == rhs->signature;
4477 /* Allocate a hash table for signatured types. */
4480 allocate_signatured_type_table (struct objfile *objfile)
4482 return htab_create_alloc_ex (41,
4483 hash_signatured_type,
4486 &objfile->objfile_obstack,
4487 hashtab_obstack_allocate,
4488 dummy_obstack_deallocate);
4491 /* A helper function to add a signatured type CU to a table. */
4494 add_signatured_type_cu_to_table (void **slot, void *datum)
4496 struct signatured_type *sigt = *slot;
4497 struct signatured_type ***datap = datum;
4505 /* Create the hash table of all entries in the .debug_types
4506 (or .debug_types.dwo) section(s).
4507 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4508 otherwise it is NULL.
4510 The result is a pointer to the hash table or NULL if there are no types.
4512 Note: This function processes DWO files only, not DWP files. */
4515 create_debug_types_hash_table (struct dwo_file *dwo_file,
4516 VEC (dwarf2_section_info_def) *types)
4518 struct objfile *objfile = dwarf2_per_objfile->objfile;
4519 htab_t types_htab = NULL;
4521 struct dwarf2_section_info *section;
4522 struct dwarf2_section_info *abbrev_section;
4524 if (VEC_empty (dwarf2_section_info_def, types))
4527 abbrev_section = (dwo_file != NULL
4528 ? &dwo_file->sections.abbrev
4529 : &dwarf2_per_objfile->abbrev);
4531 if (dwarf2_read_debug)
4532 fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n",
4533 dwo_file ? ".dwo" : "",
4534 get_section_file_name (abbrev_section));
4537 VEC_iterate (dwarf2_section_info_def, types, ix, section);
4541 const gdb_byte *info_ptr, *end_ptr;
4543 dwarf2_read_section (objfile, section);
4544 info_ptr = section->buffer;
4546 if (info_ptr == NULL)
4549 /* We can't set abfd until now because the section may be empty or
4550 not present, in which case the bfd is unknown. */
4551 abfd = get_section_bfd_owner (section);
4553 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4554 because we don't need to read any dies: the signature is in the
4557 end_ptr = info_ptr + section->size;
4558 while (info_ptr < end_ptr)
4561 cu_offset type_offset_in_tu;
4563 struct signatured_type *sig_type;
4564 struct dwo_unit *dwo_tu;
4566 const gdb_byte *ptr = info_ptr;
4567 struct comp_unit_head header;
4568 unsigned int length;
4570 offset.sect_off = ptr - section->buffer;
4572 /* We need to read the type's signature in order to build the hash
4573 table, but we don't need anything else just yet. */
4575 ptr = read_and_check_type_unit_head (&header, section,
4576 abbrev_section, ptr,
4577 &signature, &type_offset_in_tu);
4579 length = get_cu_length (&header);
4581 /* Skip dummy type units. */
4582 if (ptr >= info_ptr + length
4583 || peek_abbrev_code (abfd, ptr) == 0)
4589 if (types_htab == NULL)
4592 types_htab = allocate_dwo_unit_table (objfile);
4594 types_htab = allocate_signatured_type_table (objfile);
4600 dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4602 dwo_tu->dwo_file = dwo_file;
4603 dwo_tu->signature = signature;
4604 dwo_tu->type_offset_in_tu = type_offset_in_tu;
4605 dwo_tu->section = section;
4606 dwo_tu->offset = offset;
4607 dwo_tu->length = length;
4611 /* N.B.: type_offset is not usable if this type uses a DWO file.
4612 The real type_offset is in the DWO file. */
4614 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4615 struct signatured_type);
4616 sig_type->signature = signature;
4617 sig_type->type_offset_in_tu = type_offset_in_tu;
4618 sig_type->per_cu.objfile = objfile;
4619 sig_type->per_cu.is_debug_types = 1;
4620 sig_type->per_cu.section = section;
4621 sig_type->per_cu.offset = offset;
4622 sig_type->per_cu.length = length;
4625 slot = htab_find_slot (types_htab,
4626 dwo_file ? (void*) dwo_tu : (void *) sig_type,
4628 gdb_assert (slot != NULL);
4631 sect_offset dup_offset;
4635 const struct dwo_unit *dup_tu = *slot;
4637 dup_offset = dup_tu->offset;
4641 const struct signatured_type *dup_tu = *slot;
4643 dup_offset = dup_tu->per_cu.offset;
4646 complaint (&symfile_complaints,
4647 _("debug type entry at offset 0x%x is duplicate to"
4648 " the entry at offset 0x%x, signature %s"),
4649 offset.sect_off, dup_offset.sect_off,
4650 hex_string (signature));
4652 *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type;
4654 if (dwarf2_read_debug > 1)
4655 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n",
4657 hex_string (signature));
4666 /* Create the hash table of all entries in the .debug_types section,
4667 and initialize all_type_units.
4668 The result is zero if there is an error (e.g. missing .debug_types section),
4669 otherwise non-zero. */
4672 create_all_type_units (struct objfile *objfile)
4675 struct signatured_type **iter;
4677 types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types);
4678 if (types_htab == NULL)
4680 dwarf2_per_objfile->signatured_types = NULL;
4684 dwarf2_per_objfile->signatured_types = types_htab;
4686 dwarf2_per_objfile->n_type_units
4687 = dwarf2_per_objfile->n_allocated_type_units
4688 = htab_elements (types_htab);
4689 dwarf2_per_objfile->all_type_units
4690 = xmalloc (dwarf2_per_objfile->n_type_units
4691 * sizeof (struct signatured_type *));
4692 iter = &dwarf2_per_objfile->all_type_units[0];
4693 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter);
4694 gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0]
4695 == dwarf2_per_objfile->n_type_units);
4700 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4701 If SLOT is non-NULL, it is the entry to use in the hash table.
4702 Otherwise we find one. */
4704 static struct signatured_type *
4705 add_type_unit (ULONGEST sig, void **slot)
4707 struct objfile *objfile = dwarf2_per_objfile->objfile;
4708 int n_type_units = dwarf2_per_objfile->n_type_units;
4709 struct signatured_type *sig_type;
4711 gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units);
4713 if (n_type_units > dwarf2_per_objfile->n_allocated_type_units)
4715 if (dwarf2_per_objfile->n_allocated_type_units == 0)
4716 dwarf2_per_objfile->n_allocated_type_units = 1;
4717 dwarf2_per_objfile->n_allocated_type_units *= 2;
4718 dwarf2_per_objfile->all_type_units
4719 = xrealloc (dwarf2_per_objfile->all_type_units,
4720 dwarf2_per_objfile->n_allocated_type_units
4721 * sizeof (struct signatured_type *));
4722 ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs;
4724 dwarf2_per_objfile->n_type_units = n_type_units;
4726 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4727 struct signatured_type);
4728 dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type;
4729 sig_type->signature = sig;
4730 sig_type->per_cu.is_debug_types = 1;
4731 if (dwarf2_per_objfile->using_index)
4733 sig_type->per_cu.v.quick =
4734 OBSTACK_ZALLOC (&objfile->objfile_obstack,
4735 struct dwarf2_per_cu_quick_data);
4740 slot = htab_find_slot (dwarf2_per_objfile->signatured_types,
4743 gdb_assert (*slot == NULL);
4745 /* The rest of sig_type must be filled in by the caller. */
4749 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4750 Fill in SIG_ENTRY with DWO_ENTRY. */
4753 fill_in_sig_entry_from_dwo_entry (struct objfile *objfile,
4754 struct signatured_type *sig_entry,
4755 struct dwo_unit *dwo_entry)
4757 /* Make sure we're not clobbering something we don't expect to. */
4758 gdb_assert (! sig_entry->per_cu.queued);
4759 gdb_assert (sig_entry->per_cu.cu == NULL);
4760 if (dwarf2_per_objfile->using_index)
4762 gdb_assert (sig_entry->per_cu.v.quick != NULL);
4763 gdb_assert (sig_entry->per_cu.v.quick->symtab == NULL);
4766 gdb_assert (sig_entry->per_cu.v.psymtab == NULL);
4767 gdb_assert (sig_entry->signature == dwo_entry->signature);
4768 gdb_assert (sig_entry->type_offset_in_section.sect_off == 0);
4769 gdb_assert (sig_entry->type_unit_group == NULL);
4770 gdb_assert (sig_entry->dwo_unit == NULL);
4772 sig_entry->per_cu.section = dwo_entry->section;
4773 sig_entry->per_cu.offset = dwo_entry->offset;
4774 sig_entry->per_cu.length = dwo_entry->length;
4775 sig_entry->per_cu.reading_dwo_directly = 1;
4776 sig_entry->per_cu.objfile = objfile;
4777 sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu;
4778 sig_entry->dwo_unit = dwo_entry;
4781 /* Subroutine of lookup_signatured_type.
4782 If we haven't read the TU yet, create the signatured_type data structure
4783 for a TU to be read in directly from a DWO file, bypassing the stub.
4784 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4785 using .gdb_index, then when reading a CU we want to stay in the DWO file
4786 containing that CU. Otherwise we could end up reading several other DWO
4787 files (due to comdat folding) to process the transitive closure of all the
4788 mentioned TUs, and that can be slow. The current DWO file will have every
4789 type signature that it needs.
4790 We only do this for .gdb_index because in the psymtab case we already have
4791 to read all the DWOs to build the type unit groups. */
4793 static struct signatured_type *
4794 lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
4796 struct objfile *objfile = dwarf2_per_objfile->objfile;
4797 struct dwo_file *dwo_file;
4798 struct dwo_unit find_dwo_entry, *dwo_entry;
4799 struct signatured_type find_sig_entry, *sig_entry;
4802 gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index);
4804 /* If TU skeletons have been removed then we may not have read in any
4806 if (dwarf2_per_objfile->signatured_types == NULL)
4808 dwarf2_per_objfile->signatured_types
4809 = allocate_signatured_type_table (objfile);
4812 /* We only ever need to read in one copy of a signatured type.
4813 Use the global signatured_types array to do our own comdat-folding
4814 of types. If this is the first time we're reading this TU, and
4815 the TU has an entry in .gdb_index, replace the recorded data from
4816 .gdb_index with this TU. */
4818 find_sig_entry.signature = sig;
4819 slot = htab_find_slot (dwarf2_per_objfile->signatured_types,
4820 &find_sig_entry, INSERT);
4823 /* We can get here with the TU already read, *or* in the process of being
4824 read. Don't reassign the global entry to point to this DWO if that's
4825 the case. Also note that if the TU is already being read, it may not
4826 have come from a DWO, the program may be a mix of Fission-compiled
4827 code and non-Fission-compiled code. */
4829 /* Have we already tried to read this TU?
4830 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4831 needn't exist in the global table yet). */
4832 if (sig_entry != NULL && sig_entry->per_cu.tu_read)
4835 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4836 dwo_unit of the TU itself. */
4837 dwo_file = cu->dwo_unit->dwo_file;
4839 /* Ok, this is the first time we're reading this TU. */
4840 if (dwo_file->tus == NULL)
4842 find_dwo_entry.signature = sig;
4843 dwo_entry = htab_find (dwo_file->tus, &find_dwo_entry);
4844 if (dwo_entry == NULL)
4847 /* If the global table doesn't have an entry for this TU, add one. */
4848 if (sig_entry == NULL)
4849 sig_entry = add_type_unit (sig, slot);
4851 fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry);
4852 sig_entry->per_cu.tu_read = 1;
4856 /* Subroutine of lookup_signatured_type.
4857 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4858 then try the DWP file. If the TU stub (skeleton) has been removed then
4859 it won't be in .gdb_index. */
4861 static struct signatured_type *
4862 lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
4864 struct objfile *objfile = dwarf2_per_objfile->objfile;
4865 struct dwp_file *dwp_file = get_dwp_file ();
4866 struct dwo_unit *dwo_entry;
4867 struct signatured_type find_sig_entry, *sig_entry;
4870 gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index);
4871 gdb_assert (dwp_file != NULL);
4873 /* If TU skeletons have been removed then we may not have read in any
4875 if (dwarf2_per_objfile->signatured_types == NULL)
4877 dwarf2_per_objfile->signatured_types
4878 = allocate_signatured_type_table (objfile);
4881 find_sig_entry.signature = sig;
4882 slot = htab_find_slot (dwarf2_per_objfile->signatured_types,
4883 &find_sig_entry, INSERT);
4886 /* Have we already tried to read this TU?
4887 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4888 needn't exist in the global table yet). */
4889 if (sig_entry != NULL)
4892 if (dwp_file->tus == NULL)
4894 dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL,
4895 sig, 1 /* is_debug_types */);
4896 if (dwo_entry == NULL)
4899 sig_entry = add_type_unit (sig, slot);
4900 fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry);
4905 /* Lookup a signature based type for DW_FORM_ref_sig8.
4906 Returns NULL if signature SIG is not present in the table.
4907 It is up to the caller to complain about this. */
4909 static struct signatured_type *
4910 lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
4913 && dwarf2_per_objfile->using_index)
4915 /* We're in a DWO/DWP file, and we're using .gdb_index.
4916 These cases require special processing. */
4917 if (get_dwp_file () == NULL)
4918 return lookup_dwo_signatured_type (cu, sig);
4920 return lookup_dwp_signatured_type (cu, sig);
4924 struct signatured_type find_entry, *entry;
4926 if (dwarf2_per_objfile->signatured_types == NULL)
4928 find_entry.signature = sig;
4929 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
4934 /* Low level DIE reading support. */
4936 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4939 init_cu_die_reader (struct die_reader_specs *reader,
4940 struct dwarf2_cu *cu,
4941 struct dwarf2_section_info *section,
4942 struct dwo_file *dwo_file)
4944 gdb_assert (section->readin && section->buffer != NULL);
4945 reader->abfd = get_section_bfd_owner (section);
4947 reader->dwo_file = dwo_file;
4948 reader->die_section = section;
4949 reader->buffer = section->buffer;
4950 reader->buffer_end = section->buffer + section->size;
4951 reader->comp_dir = NULL;
4954 /* Subroutine of init_cutu_and_read_dies to simplify it.
4955 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
4956 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
4959 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
4960 from it to the DIE in the DWO. If NULL we are skipping the stub.
4961 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
4962 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
4963 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
4964 STUB_COMP_DIR may be non-NULL.
4965 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
4966 are filled in with the info of the DIE from the DWO file.
4967 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
4968 provided an abbrev table to use.
4969 The result is non-zero if a valid (non-dummy) DIE was found. */
4972 read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu,
4973 struct dwo_unit *dwo_unit,
4974 int abbrev_table_provided,
4975 struct die_info *stub_comp_unit_die,
4976 const char *stub_comp_dir,
4977 struct die_reader_specs *result_reader,
4978 const gdb_byte **result_info_ptr,
4979 struct die_info **result_comp_unit_die,
4980 int *result_has_children)
4982 struct objfile *objfile = dwarf2_per_objfile->objfile;
4983 struct dwarf2_cu *cu = this_cu->cu;
4984 struct dwarf2_section_info *section;
4986 const gdb_byte *begin_info_ptr, *info_ptr;
4987 ULONGEST signature; /* Or dwo_id. */
4988 struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
4989 int i,num_extra_attrs;
4990 struct dwarf2_section_info *dwo_abbrev_section;
4991 struct attribute *attr;
4992 struct die_info *comp_unit_die;
4994 /* At most one of these may be provided. */
4995 gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1);
4997 /* These attributes aren't processed until later:
4998 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4999 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5000 referenced later. However, these attributes are found in the stub
5001 which we won't have later. In order to not impose this complication
5002 on the rest of the code, we read them here and copy them to the
5011 if (stub_comp_unit_die != NULL)
5013 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5015 if (! this_cu->is_debug_types)
5016 stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu);
5017 low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu);
5018 high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu);
5019 ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu);
5020 comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu);
5022 /* There should be a DW_AT_addr_base attribute here (if needed).
5023 We need the value before we can process DW_FORM_GNU_addr_index. */
5025 attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu);
5027 cu->addr_base = DW_UNSND (attr);
5029 /* There should be a DW_AT_ranges_base attribute here (if needed).
5030 We need the value before we can process DW_AT_ranges. */
5031 cu->ranges_base = 0;
5032 attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu);
5034 cu->ranges_base = DW_UNSND (attr);
5036 else if (stub_comp_dir != NULL)
5038 /* Reconstruct the comp_dir attribute to simplify the code below. */
5039 comp_dir = (struct attribute *)
5040 obstack_alloc (&cu->comp_unit_obstack, sizeof (*comp_dir));
5041 comp_dir->name = DW_AT_comp_dir;
5042 comp_dir->form = DW_FORM_string;
5043 DW_STRING_IS_CANONICAL (comp_dir) = 0;
5044 DW_STRING (comp_dir) = stub_comp_dir;
5047 /* Set up for reading the DWO CU/TU. */
5048 cu->dwo_unit = dwo_unit;
5049 section = dwo_unit->section;
5050 dwarf2_read_section (objfile, section);
5051 abfd = get_section_bfd_owner (section);
5052 begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
5053 dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
5054 init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file);
5056 if (this_cu->is_debug_types)
5058 ULONGEST header_signature;
5059 cu_offset type_offset_in_tu;
5060 struct signatured_type *sig_type = (struct signatured_type *) this_cu;
5062 info_ptr = read_and_check_type_unit_head (&cu->header, section,
5066 &type_offset_in_tu);
5067 /* This is not an assert because it can be caused by bad debug info. */
5068 if (sig_type->signature != header_signature)
5070 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5071 " TU at offset 0x%x [in module %s]"),
5072 hex_string (sig_type->signature),
5073 hex_string (header_signature),
5074 dwo_unit->offset.sect_off,
5075 bfd_get_filename (abfd));
5077 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
5078 /* For DWOs coming from DWP files, we don't know the CU length
5079 nor the type's offset in the TU until now. */
5080 dwo_unit->length = get_cu_length (&cu->header);
5081 dwo_unit->type_offset_in_tu = type_offset_in_tu;
5083 /* Establish the type offset that can be used to lookup the type.
5084 For DWO files, we don't know it until now. */
5085 sig_type->type_offset_in_section.sect_off =
5086 dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
5090 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
5093 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
5094 /* For DWOs coming from DWP files, we don't know the CU length
5096 dwo_unit->length = get_cu_length (&cu->header);
5099 /* Replace the CU's original abbrev table with the DWO's.
5100 Reminder: We can't read the abbrev table until we've read the header. */
5101 if (abbrev_table_provided)
5103 /* Don't free the provided abbrev table, the caller of
5104 init_cutu_and_read_dies owns it. */
5105 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
5106 /* Ensure the DWO abbrev table gets freed. */
5107 make_cleanup (dwarf2_free_abbrev_table, cu);
5111 dwarf2_free_abbrev_table (cu);
5112 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
5113 /* Leave any existing abbrev table cleanup as is. */
5116 /* Read in the die, but leave space to copy over the attributes
5117 from the stub. This has the benefit of simplifying the rest of
5118 the code - all the work to maintain the illusion of a single
5119 DW_TAG_{compile,type}_unit DIE is done here. */
5120 num_extra_attrs = ((stmt_list != NULL)
5124 + (comp_dir != NULL));
5125 info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr,
5126 result_has_children, num_extra_attrs);
5128 /* Copy over the attributes from the stub to the DIE we just read in. */
5129 comp_unit_die = *result_comp_unit_die;
5130 i = comp_unit_die->num_attrs;
5131 if (stmt_list != NULL)
5132 comp_unit_die->attrs[i++] = *stmt_list;
5134 comp_unit_die->attrs[i++] = *low_pc;
5135 if (high_pc != NULL)
5136 comp_unit_die->attrs[i++] = *high_pc;
5138 comp_unit_die->attrs[i++] = *ranges;
5139 if (comp_dir != NULL)
5140 comp_unit_die->attrs[i++] = *comp_dir;
5141 comp_unit_die->num_attrs += num_extra_attrs;
5143 if (dwarf2_die_debug)
5145 fprintf_unfiltered (gdb_stdlog,
5146 "Read die from %s@0x%x of %s:\n",
5147 get_section_name (section),
5148 (unsigned) (begin_info_ptr - section->buffer),
5149 bfd_get_filename (abfd));
5150 dump_die (comp_unit_die, dwarf2_die_debug);
5153 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5154 TUs by skipping the stub and going directly to the entry in the DWO file.
5155 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5156 to get it via circuitous means. Blech. */
5157 if (comp_dir != NULL)
5158 result_reader->comp_dir = DW_STRING (comp_dir);
5160 /* Skip dummy compilation units. */
5161 if (info_ptr >= begin_info_ptr + dwo_unit->length
5162 || peek_abbrev_code (abfd, info_ptr) == 0)
5165 *result_info_ptr = info_ptr;
5169 /* Subroutine of init_cutu_and_read_dies to simplify it.
5170 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5171 Returns NULL if the specified DWO unit cannot be found. */
5173 static struct dwo_unit *
5174 lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu,
5175 struct die_info *comp_unit_die)
5177 struct dwarf2_cu *cu = this_cu->cu;
5178 struct attribute *attr;
5180 struct dwo_unit *dwo_unit;
5181 const char *comp_dir, *dwo_name;
5183 gdb_assert (cu != NULL);
5185 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5186 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
5187 gdb_assert (attr != NULL);
5188 dwo_name = DW_STRING (attr);
5190 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
5192 comp_dir = DW_STRING (attr);
5194 if (this_cu->is_debug_types)
5196 struct signatured_type *sig_type;
5198 /* Since this_cu is the first member of struct signatured_type,
5199 we can go from a pointer to one to a pointer to the other. */
5200 sig_type = (struct signatured_type *) this_cu;
5201 signature = sig_type->signature;
5202 dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir);
5206 struct attribute *attr;
5208 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
5210 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5212 dwo_name, objfile_name (this_cu->objfile));
5213 signature = DW_UNSND (attr);
5214 dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir,
5221 /* Subroutine of init_cutu_and_read_dies to simplify it.
5222 See it for a description of the parameters.
5223 Read a TU directly from a DWO file, bypassing the stub.
5225 Note: This function could be a little bit simpler if we shared cleanups
5226 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5227 to do, so we keep this function self-contained. Or we could move this
5228 into our caller, but it's complex enough already. */
5231 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu,
5232 int use_existing_cu, int keep,
5233 die_reader_func_ftype *die_reader_func,
5236 struct dwarf2_cu *cu;
5237 struct signatured_type *sig_type;
5238 struct cleanup *cleanups, *free_cu_cleanup = NULL;
5239 struct die_reader_specs reader;
5240 const gdb_byte *info_ptr;
5241 struct die_info *comp_unit_die;
5244 /* Verify we can do the following downcast, and that we have the
5246 gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly);
5247 sig_type = (struct signatured_type *) this_cu;
5248 gdb_assert (sig_type->dwo_unit != NULL);
5250 cleanups = make_cleanup (null_cleanup, NULL);
5252 if (use_existing_cu && this_cu->cu != NULL)
5254 gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit);
5256 /* There's no need to do the rereading_dwo_cu handling that
5257 init_cutu_and_read_dies does since we don't read the stub. */
5261 /* If !use_existing_cu, this_cu->cu must be NULL. */
5262 gdb_assert (this_cu->cu == NULL);
5263 cu = xmalloc (sizeof (*cu));
5264 init_one_comp_unit (cu, this_cu);
5265 /* If an error occurs while loading, release our storage. */
5266 free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
5269 /* A future optimization, if needed, would be to use an existing
5270 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5271 could share abbrev tables. */
5273 if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit,
5274 0 /* abbrev_table_provided */,
5275 NULL /* stub_comp_unit_die */,
5276 sig_type->dwo_unit->dwo_file->comp_dir,
5278 &comp_unit_die, &has_children) == 0)
5281 do_cleanups (cleanups);
5285 /* All the "real" work is done here. */
5286 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
5288 /* This duplicates the code in init_cutu_and_read_dies,
5289 but the alternative is making the latter more complex.
5290 This function is only for the special case of using DWO files directly:
5291 no point in overly complicating the general case just to handle this. */
5292 if (free_cu_cleanup != NULL)
5296 /* We've successfully allocated this compilation unit. Let our
5297 caller clean it up when finished with it. */
5298 discard_cleanups (free_cu_cleanup);
5300 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5301 So we have to manually free the abbrev table. */
5302 dwarf2_free_abbrev_table (cu);
5304 /* Link this CU into read_in_chain. */
5305 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
5306 dwarf2_per_objfile->read_in_chain = this_cu;
5309 do_cleanups (free_cu_cleanup);
5312 do_cleanups (cleanups);
5315 /* Initialize a CU (or TU) and read its DIEs.
5316 If the CU defers to a DWO file, read the DWO file as well.
5318 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5319 Otherwise the table specified in the comp unit header is read in and used.
5320 This is an optimization for when we already have the abbrev table.
5322 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5323 Otherwise, a new CU is allocated with xmalloc.
5325 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5326 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5328 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5329 linker) then DIE_READER_FUNC will not get called. */
5332 init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
5333 struct abbrev_table *abbrev_table,
5334 int use_existing_cu, int keep,
5335 die_reader_func_ftype *die_reader_func,
5338 struct objfile *objfile = dwarf2_per_objfile->objfile;
5339 struct dwarf2_section_info *section = this_cu->section;
5340 bfd *abfd = get_section_bfd_owner (section);
5341 struct dwarf2_cu *cu;
5342 const gdb_byte *begin_info_ptr, *info_ptr;
5343 struct die_reader_specs reader;
5344 struct die_info *comp_unit_die;
5346 struct attribute *attr;
5347 struct cleanup *cleanups, *free_cu_cleanup = NULL;
5348 struct signatured_type *sig_type = NULL;
5349 struct dwarf2_section_info *abbrev_section;
5350 /* Non-zero if CU currently points to a DWO file and we need to
5351 reread it. When this happens we need to reread the skeleton die
5352 before we can reread the DWO file (this only applies to CUs, not TUs). */
5353 int rereading_dwo_cu = 0;
5355 if (dwarf2_die_debug)
5356 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
5357 this_cu->is_debug_types ? "type" : "comp",
5358 this_cu->offset.sect_off);
5360 if (use_existing_cu)
5363 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5364 file (instead of going through the stub), short-circuit all of this. */
5365 if (this_cu->reading_dwo_directly)
5367 /* Narrow down the scope of possibilities to have to understand. */
5368 gdb_assert (this_cu->is_debug_types);
5369 gdb_assert (abbrev_table == NULL);
5370 init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep,
5371 die_reader_func, data);
5375 cleanups = make_cleanup (null_cleanup, NULL);
5377 /* This is cheap if the section is already read in. */
5378 dwarf2_read_section (objfile, section);
5380 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
5382 abbrev_section = get_abbrev_section_for_cu (this_cu);
5384 if (use_existing_cu && this_cu->cu != NULL)
5387 /* If this CU is from a DWO file we need to start over, we need to
5388 refetch the attributes from the skeleton CU.
5389 This could be optimized by retrieving those attributes from when we
5390 were here the first time: the previous comp_unit_die was stored in
5391 comp_unit_obstack. But there's no data yet that we need this
5393 if (cu->dwo_unit != NULL)
5394 rereading_dwo_cu = 1;
5398 /* If !use_existing_cu, this_cu->cu must be NULL. */
5399 gdb_assert (this_cu->cu == NULL);
5400 cu = xmalloc (sizeof (*cu));
5401 init_one_comp_unit (cu, this_cu);
5402 /* If an error occurs while loading, release our storage. */
5403 free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
5406 /* Get the header. */
5407 if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu)
5409 /* We already have the header, there's no need to read it in again. */
5410 info_ptr += cu->header.first_die_offset.cu_off;
5414 if (this_cu->is_debug_types)
5417 cu_offset type_offset_in_tu;
5419 info_ptr = read_and_check_type_unit_head (&cu->header, section,
5420 abbrev_section, info_ptr,
5422 &type_offset_in_tu);
5424 /* Since per_cu is the first member of struct signatured_type,
5425 we can go from a pointer to one to a pointer to the other. */
5426 sig_type = (struct signatured_type *) this_cu;
5427 gdb_assert (sig_type->signature == signature);
5428 gdb_assert (sig_type->type_offset_in_tu.cu_off
5429 == type_offset_in_tu.cu_off);
5430 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
5432 /* LENGTH has not been set yet for type units if we're
5433 using .gdb_index. */
5434 this_cu->length = get_cu_length (&cu->header);
5436 /* Establish the type offset that can be used to lookup the type. */
5437 sig_type->type_offset_in_section.sect_off =
5438 this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off;
5442 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
5446 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
5447 gdb_assert (this_cu->length == get_cu_length (&cu->header));
5451 /* Skip dummy compilation units. */
5452 if (info_ptr >= begin_info_ptr + this_cu->length
5453 || peek_abbrev_code (abfd, info_ptr) == 0)
5455 do_cleanups (cleanups);
5459 /* If we don't have them yet, read the abbrevs for this compilation unit.
5460 And if we need to read them now, make sure they're freed when we're
5461 done. Note that it's important that if the CU had an abbrev table
5462 on entry we don't free it when we're done: Somewhere up the call stack
5463 it may be in use. */
5464 if (abbrev_table != NULL)
5466 gdb_assert (cu->abbrev_table == NULL);
5467 gdb_assert (cu->header.abbrev_offset.sect_off
5468 == abbrev_table->offset.sect_off);
5469 cu->abbrev_table = abbrev_table;
5471 else if (cu->abbrev_table == NULL)
5473 dwarf2_read_abbrevs (cu, abbrev_section);
5474 make_cleanup (dwarf2_free_abbrev_table, cu);
5476 else if (rereading_dwo_cu)
5478 dwarf2_free_abbrev_table (cu);
5479 dwarf2_read_abbrevs (cu, abbrev_section);
5482 /* Read the top level CU/TU die. */
5483 init_cu_die_reader (&reader, cu, section, NULL);
5484 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
5486 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5488 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5489 DWO CU, that this test will fail (the attribute will not be present). */
5490 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
5493 struct dwo_unit *dwo_unit;
5494 struct die_info *dwo_comp_unit_die;
5498 complaint (&symfile_complaints,
5499 _("compilation unit with DW_AT_GNU_dwo_name"
5500 " has children (offset 0x%x) [in module %s]"),
5501 this_cu->offset.sect_off, bfd_get_filename (abfd));
5503 dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die);
5504 if (dwo_unit != NULL)
5506 if (read_cutu_die_from_dwo (this_cu, dwo_unit,
5507 abbrev_table != NULL,
5508 comp_unit_die, NULL,
5510 &dwo_comp_unit_die, &has_children) == 0)
5513 do_cleanups (cleanups);
5516 comp_unit_die = dwo_comp_unit_die;
5520 /* Yikes, we couldn't find the rest of the DIE, we only have
5521 the stub. A complaint has already been logged. There's
5522 not much more we can do except pass on the stub DIE to
5523 die_reader_func. We don't want to throw an error on bad
5528 /* All of the above is setup for this call. Yikes. */
5529 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
5531 /* Done, clean up. */
5532 if (free_cu_cleanup != NULL)
5536 /* We've successfully allocated this compilation unit. Let our
5537 caller clean it up when finished with it. */
5538 discard_cleanups (free_cu_cleanup);
5540 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5541 So we have to manually free the abbrev table. */
5542 dwarf2_free_abbrev_table (cu);
5544 /* Link this CU into read_in_chain. */
5545 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
5546 dwarf2_per_objfile->read_in_chain = this_cu;
5549 do_cleanups (free_cu_cleanup);
5552 do_cleanups (cleanups);
5555 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5556 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5557 to have already done the lookup to find the DWO file).
5559 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5560 THIS_CU->is_debug_types, but nothing else.
5562 We fill in THIS_CU->length.
5564 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5565 linker) then DIE_READER_FUNC will not get called.
5567 THIS_CU->cu is always freed when done.
5568 This is done in order to not leave THIS_CU->cu in a state where we have
5569 to care whether it refers to the "main" CU or the DWO CU. */
5572 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu,
5573 struct dwo_file *dwo_file,
5574 die_reader_func_ftype *die_reader_func,
5577 struct objfile *objfile = dwarf2_per_objfile->objfile;
5578 struct dwarf2_section_info *section = this_cu->section;
5579 bfd *abfd = get_section_bfd_owner (section);
5580 struct dwarf2_section_info *abbrev_section;
5581 struct dwarf2_cu cu;
5582 const gdb_byte *begin_info_ptr, *info_ptr;
5583 struct die_reader_specs reader;
5584 struct cleanup *cleanups;
5585 struct die_info *comp_unit_die;
5588 if (dwarf2_die_debug)
5589 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
5590 this_cu->is_debug_types ? "type" : "comp",
5591 this_cu->offset.sect_off);
5593 gdb_assert (this_cu->cu == NULL);
5595 abbrev_section = (dwo_file != NULL
5596 ? &dwo_file->sections.abbrev
5597 : get_abbrev_section_for_cu (this_cu));
5599 /* This is cheap if the section is already read in. */
5600 dwarf2_read_section (objfile, section);
5602 init_one_comp_unit (&cu, this_cu);
5604 cleanups = make_cleanup (free_stack_comp_unit, &cu);
5606 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
5607 info_ptr = read_and_check_comp_unit_head (&cu.header, section,
5608 abbrev_section, info_ptr,
5609 this_cu->is_debug_types);
5611 this_cu->length = get_cu_length (&cu.header);
5613 /* Skip dummy compilation units. */
5614 if (info_ptr >= begin_info_ptr + this_cu->length
5615 || peek_abbrev_code (abfd, info_ptr) == 0)
5617 do_cleanups (cleanups);
5621 dwarf2_read_abbrevs (&cu, abbrev_section);
5622 make_cleanup (dwarf2_free_abbrev_table, &cu);
5624 init_cu_die_reader (&reader, &cu, section, dwo_file);
5625 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
5627 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
5629 do_cleanups (cleanups);
5632 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5633 does not lookup the specified DWO file.
5634 This cannot be used to read DWO files.
5636 THIS_CU->cu is always freed when done.
5637 This is done in order to not leave THIS_CU->cu in a state where we have
5638 to care whether it refers to the "main" CU or the DWO CU.
5639 We can revisit this if the data shows there's a performance issue. */
5642 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu,
5643 die_reader_func_ftype *die_reader_func,
5646 init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data);
5649 /* Type Unit Groups.
5651 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5652 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5653 so that all types coming from the same compilation (.o file) are grouped
5654 together. A future step could be to put the types in the same symtab as
5655 the CU the types ultimately came from. */
5658 hash_type_unit_group (const void *item)
5660 const struct type_unit_group *tu_group = item;
5662 return hash_stmt_list_entry (&tu_group->hash);
5666 eq_type_unit_group (const void *item_lhs, const void *item_rhs)
5668 const struct type_unit_group *lhs = item_lhs;
5669 const struct type_unit_group *rhs = item_rhs;
5671 return eq_stmt_list_entry (&lhs->hash, &rhs->hash);
5674 /* Allocate a hash table for type unit groups. */
5677 allocate_type_unit_groups_table (void)
5679 return htab_create_alloc_ex (3,
5680 hash_type_unit_group,
5683 &dwarf2_per_objfile->objfile->objfile_obstack,
5684 hashtab_obstack_allocate,
5685 dummy_obstack_deallocate);
5688 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5689 partial symtabs. We combine several TUs per psymtab to not let the size
5690 of any one psymtab grow too big. */
5691 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5692 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5694 /* Helper routine for get_type_unit_group.
5695 Create the type_unit_group object used to hold one or more TUs. */
5697 static struct type_unit_group *
5698 create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct)
5700 struct objfile *objfile = dwarf2_per_objfile->objfile;
5701 struct dwarf2_per_cu_data *per_cu;
5702 struct type_unit_group *tu_group;
5704 tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5705 struct type_unit_group);
5706 per_cu = &tu_group->per_cu;
5707 per_cu->objfile = objfile;
5709 if (dwarf2_per_objfile->using_index)
5711 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5712 struct dwarf2_per_cu_quick_data);
5716 unsigned int line_offset = line_offset_struct.sect_off;
5717 struct partial_symtab *pst;
5720 /* Give the symtab a useful name for debug purposes. */
5721 if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
5722 name = xstrprintf ("<type_units_%d>",
5723 (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
5725 name = xstrprintf ("<type_units_at_0x%x>", line_offset);
5727 pst = create_partial_symtab (per_cu, name);
5733 tu_group->hash.dwo_unit = cu->dwo_unit;
5734 tu_group->hash.line_offset = line_offset_struct;
5739 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5740 STMT_LIST is a DW_AT_stmt_list attribute. */
5742 static struct type_unit_group *
5743 get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list)
5745 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
5746 struct type_unit_group *tu_group;
5748 unsigned int line_offset;
5749 struct type_unit_group type_unit_group_for_lookup;
5751 if (dwarf2_per_objfile->type_unit_groups == NULL)
5753 dwarf2_per_objfile->type_unit_groups =
5754 allocate_type_unit_groups_table ();
5757 /* Do we need to create a new group, or can we use an existing one? */
5761 line_offset = DW_UNSND (stmt_list);
5762 ++tu_stats->nr_symtab_sharers;
5766 /* Ugh, no stmt_list. Rare, but we have to handle it.
5767 We can do various things here like create one group per TU or
5768 spread them over multiple groups to split up the expansion work.
5769 To avoid worst case scenarios (too many groups or too large groups)
5770 we, umm, group them in bunches. */
5771 line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5772 | (tu_stats->nr_stmt_less_type_units
5773 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE));
5774 ++tu_stats->nr_stmt_less_type_units;
5777 type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit;
5778 type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset;
5779 slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups,
5780 &type_unit_group_for_lookup, INSERT);
5784 gdb_assert (tu_group != NULL);
5788 sect_offset line_offset_struct;
5790 line_offset_struct.sect_off = line_offset;
5791 tu_group = create_type_unit_group (cu, line_offset_struct);
5793 ++tu_stats->nr_symtabs;
5799 /* Partial symbol tables. */
5801 /* Create a psymtab named NAME and assign it to PER_CU.
5803 The caller must fill in the following details:
5804 dirname, textlow, texthigh. */
5806 static struct partial_symtab *
5807 create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
5809 struct objfile *objfile = per_cu->objfile;
5810 struct partial_symtab *pst;
5812 pst = start_psymtab_common (objfile, objfile->section_offsets,
5814 objfile->global_psymbols.next,
5815 objfile->static_psymbols.next);
5817 pst->psymtabs_addrmap_supported = 1;
5819 /* This is the glue that links PST into GDB's symbol API. */
5820 pst->read_symtab_private = per_cu;
5821 pst->read_symtab = dwarf2_read_symtab;
5822 per_cu->v.psymtab = pst;
5827 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5830 struct process_psymtab_comp_unit_data
5832 /* True if we are reading a DW_TAG_partial_unit. */
5834 int want_partial_unit;
5836 /* The "pretend" language that is used if the CU doesn't declare a
5839 enum language pretend_language;
5842 /* die_reader_func for process_psymtab_comp_unit. */
5845 process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
5846 const gdb_byte *info_ptr,
5847 struct die_info *comp_unit_die,
5851 struct dwarf2_cu *cu = reader->cu;
5852 struct objfile *objfile = cu->objfile;
5853 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
5854 struct attribute *attr;
5856 CORE_ADDR best_lowpc = 0, best_highpc = 0;
5857 struct partial_symtab *pst;
5859 const char *filename;
5860 struct process_psymtab_comp_unit_data *info = data;
5862 if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit)
5865 gdb_assert (! per_cu->is_debug_types);
5867 prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language);
5869 cu->list_in_scope = &file_symbols;
5871 /* Allocate a new partial symbol table structure. */
5872 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
5873 if (attr == NULL || !DW_STRING (attr))
5876 filename = DW_STRING (attr);
5878 pst = create_partial_symtab (per_cu, filename);
5880 /* This must be done before calling dwarf2_build_include_psymtabs. */
5881 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
5883 pst->dirname = DW_STRING (attr);
5885 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5887 dwarf2_find_base_address (comp_unit_die, cu);
5889 /* Possibly set the default values of LOWPC and HIGHPC from
5891 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
5892 &best_highpc, cu, pst);
5893 if (has_pc_info == 1 && best_lowpc < best_highpc)
5894 /* Store the contiguous range if it is not empty; it can be empty for
5895 CUs with no code. */
5896 addrmap_set_empty (objfile->psymtabs_addrmap,
5897 best_lowpc + baseaddr,
5898 best_highpc + baseaddr - 1, pst);
5900 /* Check if comp unit has_children.
5901 If so, read the rest of the partial symbols from this comp unit.
5902 If not, there's no more debug_info for this comp unit. */
5905 struct partial_die_info *first_die;
5906 CORE_ADDR lowpc, highpc;
5908 lowpc = ((CORE_ADDR) -1);
5909 highpc = ((CORE_ADDR) 0);
5911 first_die = load_partial_dies (reader, info_ptr, 1);
5913 scan_partial_symbols (first_die, &lowpc, &highpc,
5916 /* If we didn't find a lowpc, set it to highpc to avoid
5917 complaints from `maint check'. */
5918 if (lowpc == ((CORE_ADDR) -1))
5921 /* If the compilation unit didn't have an explicit address range,
5922 then use the information extracted from its child dies. */
5926 best_highpc = highpc;
5929 pst->textlow = best_lowpc + baseaddr;
5930 pst->texthigh = best_highpc + baseaddr;
5932 pst->n_global_syms = objfile->global_psymbols.next -
5933 (objfile->global_psymbols.list + pst->globals_offset);
5934 pst->n_static_syms = objfile->static_psymbols.next -
5935 (objfile->static_psymbols.list + pst->statics_offset);
5936 sort_pst_symbols (objfile, pst);
5938 if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs))
5941 int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
5942 struct dwarf2_per_cu_data *iter;
5944 /* Fill in 'dependencies' here; we fill in 'users' in a
5946 pst->number_of_dependencies = len;
5947 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
5948 len * sizeof (struct symtab *));
5950 VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
5953 pst->dependencies[i] = iter->v.psymtab;
5955 VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
5958 /* Get the list of files included in the current compilation unit,
5959 and build a psymtab for each of them. */
5960 dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
5962 if (dwarf2_read_debug)
5964 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5966 fprintf_unfiltered (gdb_stdlog,
5967 "Psymtab for %s unit @0x%x: %s - %s"
5968 ", %d global, %d static syms\n",
5969 per_cu->is_debug_types ? "type" : "comp",
5970 per_cu->offset.sect_off,
5971 paddress (gdbarch, pst->textlow),
5972 paddress (gdbarch, pst->texthigh),
5973 pst->n_global_syms, pst->n_static_syms);
5977 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5978 Process compilation unit THIS_CU for a psymtab. */
5981 process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
5982 int want_partial_unit,
5983 enum language pretend_language)
5985 struct process_psymtab_comp_unit_data info;
5987 /* If this compilation unit was already read in, free the
5988 cached copy in order to read it in again. This is
5989 necessary because we skipped some symbols when we first
5990 read in the compilation unit (see load_partial_dies).
5991 This problem could be avoided, but the benefit is unclear. */
5992 if (this_cu->cu != NULL)
5993 free_one_cached_comp_unit (this_cu);
5995 gdb_assert (! this_cu->is_debug_types);
5996 info.want_partial_unit = want_partial_unit;
5997 info.pretend_language = pretend_language;
5998 init_cutu_and_read_dies (this_cu, NULL, 0, 0,
5999 process_psymtab_comp_unit_reader,
6002 /* Age out any secondary CUs. */
6003 age_cached_comp_units ();
6006 /* Reader function for build_type_psymtabs. */
6009 build_type_psymtabs_reader (const struct die_reader_specs *reader,
6010 const gdb_byte *info_ptr,
6011 struct die_info *type_unit_die,
6015 struct objfile *objfile = dwarf2_per_objfile->objfile;
6016 struct dwarf2_cu *cu = reader->cu;
6017 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
6018 struct signatured_type *sig_type;
6019 struct type_unit_group *tu_group;
6020 struct attribute *attr;
6021 struct partial_die_info *first_die;
6022 CORE_ADDR lowpc, highpc;
6023 struct partial_symtab *pst;
6025 gdb_assert (data == NULL);
6026 gdb_assert (per_cu->is_debug_types);
6027 sig_type = (struct signatured_type *) per_cu;
6032 attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
6033 tu_group = get_type_unit_group (cu, attr);
6035 VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type);
6037 prepare_one_comp_unit (cu, type_unit_die, language_minimal);
6038 cu->list_in_scope = &file_symbols;
6039 pst = create_partial_symtab (per_cu, "");
6042 first_die = load_partial_dies (reader, info_ptr, 1);
6044 lowpc = (CORE_ADDR) -1;
6045 highpc = (CORE_ADDR) 0;
6046 scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu);
6048 pst->n_global_syms = objfile->global_psymbols.next -
6049 (objfile->global_psymbols.list + pst->globals_offset);
6050 pst->n_static_syms = objfile->static_psymbols.next -
6051 (objfile->static_psymbols.list + pst->statics_offset);
6052 sort_pst_symbols (objfile, pst);
6055 /* Struct used to sort TUs by their abbreviation table offset. */
6057 struct tu_abbrev_offset
6059 struct signatured_type *sig_type;
6060 sect_offset abbrev_offset;
6063 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6066 sort_tu_by_abbrev_offset (const void *ap, const void *bp)
6068 const struct tu_abbrev_offset * const *a = ap;
6069 const struct tu_abbrev_offset * const *b = bp;
6070 unsigned int aoff = (*a)->abbrev_offset.sect_off;
6071 unsigned int boff = (*b)->abbrev_offset.sect_off;
6073 return (aoff > boff) - (aoff < boff);
6076 /* Efficiently read all the type units.
6077 This does the bulk of the work for build_type_psymtabs.
6079 The efficiency is because we sort TUs by the abbrev table they use and
6080 only read each abbrev table once. In one program there are 200K TUs
6081 sharing 8K abbrev tables.
6083 The main purpose of this function is to support building the
6084 dwarf2_per_objfile->type_unit_groups table.
6085 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6086 can collapse the search space by grouping them by stmt_list.
6087 The savings can be significant, in the same program from above the 200K TUs
6088 share 8K stmt_list tables.
6090 FUNC is expected to call get_type_unit_group, which will create the
6091 struct type_unit_group if necessary and add it to
6092 dwarf2_per_objfile->type_unit_groups. */
6095 build_type_psymtabs_1 (void)
6097 struct objfile *objfile = dwarf2_per_objfile->objfile;
6098 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
6099 struct cleanup *cleanups;
6100 struct abbrev_table *abbrev_table;
6101 sect_offset abbrev_offset;
6102 struct tu_abbrev_offset *sorted_by_abbrev;
6103 struct type_unit_group **iter;
6106 /* It's up to the caller to not call us multiple times. */
6107 gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL);
6109 if (dwarf2_per_objfile->n_type_units == 0)
6112 /* TUs typically share abbrev tables, and there can be way more TUs than
6113 abbrev tables. Sort by abbrev table to reduce the number of times we
6114 read each abbrev table in.
6115 Alternatives are to punt or to maintain a cache of abbrev tables.
6116 This is simpler and efficient enough for now.
6118 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6119 symtab to use). Typically TUs with the same abbrev offset have the same
6120 stmt_list value too so in practice this should work well.
6122 The basic algorithm here is:
6124 sort TUs by abbrev table
6125 for each TU with same abbrev table:
6126 read abbrev table if first user
6127 read TU top level DIE
6128 [IWBN if DWO skeletons had DW_AT_stmt_list]
6131 if (dwarf2_read_debug)
6132 fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n");
6134 /* Sort in a separate table to maintain the order of all_type_units
6135 for .gdb_index: TU indices directly index all_type_units. */
6136 sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset,
6137 dwarf2_per_objfile->n_type_units);
6138 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
6140 struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i];
6142 sorted_by_abbrev[i].sig_type = sig_type;
6143 sorted_by_abbrev[i].abbrev_offset =
6144 read_abbrev_offset (sig_type->per_cu.section,
6145 sig_type->per_cu.offset);
6147 cleanups = make_cleanup (xfree, sorted_by_abbrev);
6148 qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units,
6149 sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset);
6151 abbrev_offset.sect_off = ~(unsigned) 0;
6152 abbrev_table = NULL;
6153 make_cleanup (abbrev_table_free_cleanup, &abbrev_table);
6155 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
6157 const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i];
6159 /* Switch to the next abbrev table if necessary. */
6160 if (abbrev_table == NULL
6161 || tu->abbrev_offset.sect_off != abbrev_offset.sect_off)
6163 if (abbrev_table != NULL)
6165 abbrev_table_free (abbrev_table);
6166 /* Reset to NULL in case abbrev_table_read_table throws
6167 an error: abbrev_table_free_cleanup will get called. */
6168 abbrev_table = NULL;
6170 abbrev_offset = tu->abbrev_offset;
6172 abbrev_table_read_table (&dwarf2_per_objfile->abbrev,
6174 ++tu_stats->nr_uniq_abbrev_tables;
6177 init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0,
6178 build_type_psymtabs_reader, NULL);
6181 do_cleanups (cleanups);
6184 /* Print collected type unit statistics. */
6187 print_tu_stats (void)
6189 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
6191 fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n");
6192 fprintf_unfiltered (gdb_stdlog, " %d TUs\n",
6193 dwarf2_per_objfile->n_type_units);
6194 fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n",
6195 tu_stats->nr_uniq_abbrev_tables);
6196 fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n",
6197 tu_stats->nr_symtabs);
6198 fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n",
6199 tu_stats->nr_symtab_sharers);
6200 fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n",
6201 tu_stats->nr_stmt_less_type_units);
6202 fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n",
6203 tu_stats->nr_all_type_units_reallocs);
6206 /* Traversal function for build_type_psymtabs. */
6209 build_type_psymtab_dependencies (void **slot, void *info)
6211 struct objfile *objfile = dwarf2_per_objfile->objfile;
6212 struct type_unit_group *tu_group = (struct type_unit_group *) *slot;
6213 struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu;
6214 struct partial_symtab *pst = per_cu->v.psymtab;
6215 int len = VEC_length (sig_type_ptr, tu_group->tus);
6216 struct signatured_type *iter;
6219 gdb_assert (len > 0);
6220 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu));
6222 pst->number_of_dependencies = len;
6223 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
6224 len * sizeof (struct psymtab *));
6226 VEC_iterate (sig_type_ptr, tu_group->tus, i, iter);
6229 gdb_assert (iter->per_cu.is_debug_types);
6230 pst->dependencies[i] = iter->per_cu.v.psymtab;
6231 iter->type_unit_group = tu_group;
6234 VEC_free (sig_type_ptr, tu_group->tus);
6239 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6240 Build partial symbol tables for the .debug_types comp-units. */
6243 build_type_psymtabs (struct objfile *objfile)
6245 if (! create_all_type_units (objfile))
6248 build_type_psymtabs_1 ();
6251 /* Traversal function for process_skeletonless_type_unit.
6252 Read a TU in a DWO file and build partial symbols for it. */
6255 process_skeletonless_type_unit (void **slot, void *info)
6257 struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot;
6258 struct objfile *objfile = info;
6259 struct signatured_type find_entry, *entry;
6261 /* If this TU doesn't exist in the global table, add it and read it in. */
6263 if (dwarf2_per_objfile->signatured_types == NULL)
6265 dwarf2_per_objfile->signatured_types
6266 = allocate_signatured_type_table (objfile);
6269 find_entry.signature = dwo_unit->signature;
6270 slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry,
6272 /* If we've already seen this type there's nothing to do. What's happening
6273 is we're doing our own version of comdat-folding here. */
6277 /* This does the job that create_all_type_units would have done for
6279 entry = add_type_unit (dwo_unit->signature, slot);
6280 fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit);
6283 /* This does the job that build_type_psymtabs_1 would have done. */
6284 init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0,
6285 build_type_psymtabs_reader, NULL);
6290 /* Traversal function for process_skeletonless_type_units. */
6293 process_dwo_file_for_skeletonless_type_units (void **slot, void *info)
6295 struct dwo_file *dwo_file = (struct dwo_file *) *slot;
6297 if (dwo_file->tus != NULL)
6299 htab_traverse_noresize (dwo_file->tus,
6300 process_skeletonless_type_unit, info);
6306 /* Scan all TUs of DWO files, verifying we've processed them.
6307 This is needed in case a TU was emitted without its skeleton.
6308 Note: This can't be done until we know what all the DWO files are. */
6311 process_skeletonless_type_units (struct objfile *objfile)
6313 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6314 if (get_dwp_file () == NULL
6315 && dwarf2_per_objfile->dwo_files != NULL)
6317 htab_traverse_noresize (dwarf2_per_objfile->dwo_files,
6318 process_dwo_file_for_skeletonless_type_units,
6323 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6326 psymtabs_addrmap_cleanup (void *o)
6328 struct objfile *objfile = o;
6330 objfile->psymtabs_addrmap = NULL;
6333 /* Compute the 'user' field for each psymtab in OBJFILE. */
6336 set_partial_user (struct objfile *objfile)
6340 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
6342 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
6343 struct partial_symtab *pst = per_cu->v.psymtab;
6349 for (j = 0; j < pst->number_of_dependencies; ++j)
6351 /* Set the 'user' field only if it is not already set. */
6352 if (pst->dependencies[j]->user == NULL)
6353 pst->dependencies[j]->user = pst;
6358 /* Build the partial symbol table by doing a quick pass through the
6359 .debug_info and .debug_abbrev sections. */
6362 dwarf2_build_psymtabs_hard (struct objfile *objfile)
6364 struct cleanup *back_to, *addrmap_cleanup;
6365 struct obstack temp_obstack;
6368 if (dwarf2_read_debug)
6370 fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n",
6371 objfile_name (objfile));
6374 dwarf2_per_objfile->reading_partial_symbols = 1;
6376 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
6378 /* Any cached compilation units will be linked by the per-objfile
6379 read_in_chain. Make sure to free them when we're done. */
6380 back_to = make_cleanup (free_cached_comp_units, NULL);
6382 build_type_psymtabs (objfile);
6384 create_all_comp_units (objfile);
6386 /* Create a temporary address map on a temporary obstack. We later
6387 copy this to the final obstack. */
6388 obstack_init (&temp_obstack);
6389 make_cleanup_obstack_free (&temp_obstack);
6390 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
6391 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
6393 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
6395 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
6397 process_psymtab_comp_unit (per_cu, 0, language_minimal);
6400 /* This has to wait until we read the CUs, we need the list of DWOs. */
6401 process_skeletonless_type_units (objfile);
6403 /* Now that all TUs have been processed we can fill in the dependencies. */
6404 if (dwarf2_per_objfile->type_unit_groups != NULL)
6406 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
6407 build_type_psymtab_dependencies, NULL);
6410 if (dwarf2_read_debug)
6413 set_partial_user (objfile);
6415 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
6416 &objfile->objfile_obstack);
6417 discard_cleanups (addrmap_cleanup);
6419 do_cleanups (back_to);
6421 if (dwarf2_read_debug)
6422 fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n",
6423 objfile_name (objfile));
6426 /* die_reader_func for load_partial_comp_unit. */
6429 load_partial_comp_unit_reader (const struct die_reader_specs *reader,
6430 const gdb_byte *info_ptr,
6431 struct die_info *comp_unit_die,
6435 struct dwarf2_cu *cu = reader->cu;
6437 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
6439 /* Check if comp unit has_children.
6440 If so, read the rest of the partial symbols from this comp unit.
6441 If not, there's no more debug_info for this comp unit. */
6443 load_partial_dies (reader, info_ptr, 0);
6446 /* Load the partial DIEs for a secondary CU into memory.
6447 This is also used when rereading a primary CU with load_all_dies. */
6450 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
6452 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
6453 load_partial_comp_unit_reader, NULL);
6457 read_comp_units_from_section (struct objfile *objfile,
6458 struct dwarf2_section_info *section,
6459 unsigned int is_dwz,
6462 struct dwarf2_per_cu_data ***all_comp_units)
6464 const gdb_byte *info_ptr;
6465 bfd *abfd = get_section_bfd_owner (section);
6467 if (dwarf2_read_debug)
6468 fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n",
6469 get_section_name (section),
6470 get_section_file_name (section));
6472 dwarf2_read_section (objfile, section);
6474 info_ptr = section->buffer;
6476 while (info_ptr < section->buffer + section->size)
6478 unsigned int length, initial_length_size;
6479 struct dwarf2_per_cu_data *this_cu;
6482 offset.sect_off = info_ptr - section->buffer;
6484 /* Read just enough information to find out where the next
6485 compilation unit is. */
6486 length = read_initial_length (abfd, info_ptr, &initial_length_size);
6488 /* Save the compilation unit for later lookup. */
6489 this_cu = obstack_alloc (&objfile->objfile_obstack,
6490 sizeof (struct dwarf2_per_cu_data));
6491 memset (this_cu, 0, sizeof (*this_cu));
6492 this_cu->offset = offset;
6493 this_cu->length = length + initial_length_size;
6494 this_cu->is_dwz = is_dwz;
6495 this_cu->objfile = objfile;
6496 this_cu->section = section;
6498 if (*n_comp_units == *n_allocated)
6501 *all_comp_units = xrealloc (*all_comp_units,
6503 * sizeof (struct dwarf2_per_cu_data *));
6505 (*all_comp_units)[*n_comp_units] = this_cu;
6508 info_ptr = info_ptr + this_cu->length;
6512 /* Create a list of all compilation units in OBJFILE.
6513 This is only done for -readnow and building partial symtabs. */
6516 create_all_comp_units (struct objfile *objfile)
6520 struct dwarf2_per_cu_data **all_comp_units;
6521 struct dwz_file *dwz;
6525 all_comp_units = xmalloc (n_allocated
6526 * sizeof (struct dwarf2_per_cu_data *));
6528 read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0,
6529 &n_allocated, &n_comp_units, &all_comp_units);
6531 dwz = dwarf2_get_dwz_file ();
6533 read_comp_units_from_section (objfile, &dwz->info, 1,
6534 &n_allocated, &n_comp_units,
6537 dwarf2_per_objfile->all_comp_units
6538 = obstack_alloc (&objfile->objfile_obstack,
6539 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
6540 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
6541 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
6542 xfree (all_comp_units);
6543 dwarf2_per_objfile->n_comp_units = n_comp_units;
6546 /* Process all loaded DIEs for compilation unit CU, starting at
6547 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
6548 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6549 DW_AT_ranges). If NEED_PC is set, then this function will set
6550 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
6551 and record the covered ranges in the addrmap. */
6554 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
6555 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
6557 struct partial_die_info *pdi;
6559 /* Now, march along the PDI's, descending into ones which have
6560 interesting children but skipping the children of the other ones,
6561 until we reach the end of the compilation unit. */
6567 fixup_partial_die (pdi, cu);
6569 /* Anonymous namespaces or modules have no name but have interesting
6570 children, so we need to look at them. Ditto for anonymous
6573 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
6574 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type
6575 || pdi->tag == DW_TAG_imported_unit)
6579 case DW_TAG_subprogram:
6580 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
6582 case DW_TAG_constant:
6583 case DW_TAG_variable:
6584 case DW_TAG_typedef:
6585 case DW_TAG_union_type:
6586 if (!pdi->is_declaration)
6588 add_partial_symbol (pdi, cu);
6591 case DW_TAG_class_type:
6592 case DW_TAG_interface_type:
6593 case DW_TAG_structure_type:
6594 if (!pdi->is_declaration)
6596 add_partial_symbol (pdi, cu);
6599 case DW_TAG_enumeration_type:
6600 if (!pdi->is_declaration)
6601 add_partial_enumeration (pdi, cu);
6603 case DW_TAG_base_type:
6604 case DW_TAG_subrange_type:
6605 /* File scope base type definitions are added to the partial
6607 add_partial_symbol (pdi, cu);
6609 case DW_TAG_namespace:
6610 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
6613 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
6615 case DW_TAG_imported_unit:
6617 struct dwarf2_per_cu_data *per_cu;
6619 /* For now we don't handle imported units in type units. */
6620 if (cu->per_cu->is_debug_types)
6622 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6623 " supported in type units [in module %s]"),
6624 objfile_name (cu->objfile));
6627 per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset,
6631 /* Go read the partial unit, if needed. */
6632 if (per_cu->v.psymtab == NULL)
6633 process_psymtab_comp_unit (per_cu, 1, cu->language);
6635 VEC_safe_push (dwarf2_per_cu_ptr,
6636 cu->per_cu->imported_symtabs, per_cu);
6639 case DW_TAG_imported_declaration:
6640 add_partial_symbol (pdi, cu);
6647 /* If the die has a sibling, skip to the sibling. */
6649 pdi = pdi->die_sibling;
6653 /* Functions used to compute the fully scoped name of a partial DIE.
6655 Normally, this is simple. For C++, the parent DIE's fully scoped
6656 name is concatenated with "::" and the partial DIE's name. For
6657 Java, the same thing occurs except that "." is used instead of "::".
6658 Enumerators are an exception; they use the scope of their parent
6659 enumeration type, i.e. the name of the enumeration type is not
6660 prepended to the enumerator.
6662 There are two complexities. One is DW_AT_specification; in this
6663 case "parent" means the parent of the target of the specification,
6664 instead of the direct parent of the DIE. The other is compilers
6665 which do not emit DW_TAG_namespace; in this case we try to guess
6666 the fully qualified name of structure types from their members'
6667 linkage names. This must be done using the DIE's children rather
6668 than the children of any DW_AT_specification target. We only need
6669 to do this for structures at the top level, i.e. if the target of
6670 any DW_AT_specification (if any; otherwise the DIE itself) does not
6673 /* Compute the scope prefix associated with PDI's parent, in
6674 compilation unit CU. The result will be allocated on CU's
6675 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6676 field. NULL is returned if no prefix is necessary. */
6678 partial_die_parent_scope (struct partial_die_info *pdi,
6679 struct dwarf2_cu *cu)
6681 const char *grandparent_scope;
6682 struct partial_die_info *parent, *real_pdi;
6684 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6685 then this means the parent of the specification DIE. */
6688 while (real_pdi->has_specification)
6689 real_pdi = find_partial_die (real_pdi->spec_offset,
6690 real_pdi->spec_is_dwz, cu);
6692 parent = real_pdi->die_parent;
6696 if (parent->scope_set)
6697 return parent->scope;
6699 fixup_partial_die (parent, cu);
6701 grandparent_scope = partial_die_parent_scope (parent, cu);
6703 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6704 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6705 Work around this problem here. */
6706 if (cu->language == language_cplus
6707 && parent->tag == DW_TAG_namespace
6708 && strcmp (parent->name, "::") == 0
6709 && grandparent_scope == NULL)
6711 parent->scope = NULL;
6712 parent->scope_set = 1;
6716 if (pdi->tag == DW_TAG_enumerator)
6717 /* Enumerators should not get the name of the enumeration as a prefix. */
6718 parent->scope = grandparent_scope;
6719 else if (parent->tag == DW_TAG_namespace
6720 || parent->tag == DW_TAG_module
6721 || parent->tag == DW_TAG_structure_type
6722 || parent->tag == DW_TAG_class_type
6723 || parent->tag == DW_TAG_interface_type
6724 || parent->tag == DW_TAG_union_type
6725 || parent->tag == DW_TAG_enumeration_type)
6727 if (grandparent_scope == NULL)
6728 parent->scope = parent->name;
6730 parent->scope = typename_concat (&cu->comp_unit_obstack,
6732 parent->name, 0, cu);
6736 /* FIXME drow/2004-04-01: What should we be doing with
6737 function-local names? For partial symbols, we should probably be
6739 complaint (&symfile_complaints,
6740 _("unhandled containing DIE tag %d for DIE at %d"),
6741 parent->tag, pdi->offset.sect_off);
6742 parent->scope = grandparent_scope;
6745 parent->scope_set = 1;
6746 return parent->scope;
6749 /* Return the fully scoped name associated with PDI, from compilation unit
6750 CU. The result will be allocated with malloc. */
6753 partial_die_full_name (struct partial_die_info *pdi,
6754 struct dwarf2_cu *cu)
6756 const char *parent_scope;
6758 /* If this is a template instantiation, we can not work out the
6759 template arguments from partial DIEs. So, unfortunately, we have
6760 to go through the full DIEs. At least any work we do building
6761 types here will be reused if full symbols are loaded later. */
6762 if (pdi->has_template_arguments)
6764 fixup_partial_die (pdi, cu);
6766 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
6768 struct die_info *die;
6769 struct attribute attr;
6770 struct dwarf2_cu *ref_cu = cu;
6772 /* DW_FORM_ref_addr is using section offset. */
6774 attr.form = DW_FORM_ref_addr;
6775 attr.u.unsnd = pdi->offset.sect_off;
6776 die = follow_die_ref (NULL, &attr, &ref_cu);
6778 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
6782 parent_scope = partial_die_parent_scope (pdi, cu);
6783 if (parent_scope == NULL)
6786 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
6790 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
6792 struct objfile *objfile = cu->objfile;
6794 const char *actual_name = NULL;
6796 char *built_actual_name;
6798 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6800 built_actual_name = partial_die_full_name (pdi, cu);
6801 if (built_actual_name != NULL)
6802 actual_name = built_actual_name;
6804 if (actual_name == NULL)
6805 actual_name = pdi->name;
6809 case DW_TAG_subprogram:
6810 if (pdi->is_external || cu->language == language_ada)
6812 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6813 of the global scope. But in Ada, we want to be able to access
6814 nested procedures globally. So all Ada subprograms are stored
6815 in the global scope. */
6816 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6817 mst_text, objfile); */
6818 add_psymbol_to_list (actual_name, strlen (actual_name),
6819 built_actual_name != NULL,
6820 VAR_DOMAIN, LOC_BLOCK,
6821 &objfile->global_psymbols,
6822 0, pdi->lowpc + baseaddr,
6823 cu->language, objfile);
6827 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6828 mst_file_text, objfile); */
6829 add_psymbol_to_list (actual_name, strlen (actual_name),
6830 built_actual_name != NULL,
6831 VAR_DOMAIN, LOC_BLOCK,
6832 &objfile->static_psymbols,
6833 0, pdi->lowpc + baseaddr,
6834 cu->language, objfile);
6837 case DW_TAG_constant:
6839 struct psymbol_allocation_list *list;
6841 if (pdi->is_external)
6842 list = &objfile->global_psymbols;
6844 list = &objfile->static_psymbols;
6845 add_psymbol_to_list (actual_name, strlen (actual_name),
6846 built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC,
6847 list, 0, 0, cu->language, objfile);
6850 case DW_TAG_variable:
6852 addr = decode_locdesc (pdi->d.locdesc, cu);
6856 && !dwarf2_per_objfile->has_section_at_zero)
6858 /* A global or static variable may also have been stripped
6859 out by the linker if unused, in which case its address
6860 will be nullified; do not add such variables into partial
6861 symbol table then. */
6863 else if (pdi->is_external)
6866 Don't enter into the minimal symbol tables as there is
6867 a minimal symbol table entry from the ELF symbols already.
6868 Enter into partial symbol table if it has a location
6869 descriptor or a type.
6870 If the location descriptor is missing, new_symbol will create
6871 a LOC_UNRESOLVED symbol, the address of the variable will then
6872 be determined from the minimal symbol table whenever the variable
6874 The address for the partial symbol table entry is not
6875 used by GDB, but it comes in handy for debugging partial symbol
6878 if (pdi->d.locdesc || pdi->has_type)
6879 add_psymbol_to_list (actual_name, strlen (actual_name),
6880 built_actual_name != NULL,
6881 VAR_DOMAIN, LOC_STATIC,
6882 &objfile->global_psymbols,
6884 cu->language, objfile);
6888 /* Static Variable. Skip symbols without location descriptors. */
6889 if (pdi->d.locdesc == NULL)
6891 xfree (built_actual_name);
6894 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6895 mst_file_data, objfile); */
6896 add_psymbol_to_list (actual_name, strlen (actual_name),
6897 built_actual_name != NULL,
6898 VAR_DOMAIN, LOC_STATIC,
6899 &objfile->static_psymbols,
6901 cu->language, objfile);
6904 case DW_TAG_typedef:
6905 case DW_TAG_base_type:
6906 case DW_TAG_subrange_type:
6907 add_psymbol_to_list (actual_name, strlen (actual_name),
6908 built_actual_name != NULL,
6909 VAR_DOMAIN, LOC_TYPEDEF,
6910 &objfile->static_psymbols,
6911 0, (CORE_ADDR) 0, cu->language, objfile);
6913 case DW_TAG_imported_declaration:
6914 case DW_TAG_namespace:
6915 add_psymbol_to_list (actual_name, strlen (actual_name),
6916 built_actual_name != NULL,
6917 VAR_DOMAIN, LOC_TYPEDEF,
6918 &objfile->global_psymbols,
6919 0, (CORE_ADDR) 0, cu->language, objfile);
6922 add_psymbol_to_list (actual_name, strlen (actual_name),
6923 built_actual_name != NULL,
6924 MODULE_DOMAIN, LOC_TYPEDEF,
6925 &objfile->global_psymbols,
6926 0, (CORE_ADDR) 0, cu->language, objfile);
6928 case DW_TAG_class_type:
6929 case DW_TAG_interface_type:
6930 case DW_TAG_structure_type:
6931 case DW_TAG_union_type:
6932 case DW_TAG_enumeration_type:
6933 /* Skip external references. The DWARF standard says in the section
6934 about "Structure, Union, and Class Type Entries": "An incomplete
6935 structure, union or class type is represented by a structure,
6936 union or class entry that does not have a byte size attribute
6937 and that has a DW_AT_declaration attribute." */
6938 if (!pdi->has_byte_size && pdi->is_declaration)
6940 xfree (built_actual_name);
6944 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6945 static vs. global. */
6946 add_psymbol_to_list (actual_name, strlen (actual_name),
6947 built_actual_name != NULL,
6948 STRUCT_DOMAIN, LOC_TYPEDEF,
6949 (cu->language == language_cplus
6950 || cu->language == language_java)
6951 ? &objfile->global_psymbols
6952 : &objfile->static_psymbols,
6953 0, (CORE_ADDR) 0, cu->language, objfile);
6956 case DW_TAG_enumerator:
6957 add_psymbol_to_list (actual_name, strlen (actual_name),
6958 built_actual_name != NULL,
6959 VAR_DOMAIN, LOC_CONST,
6960 (cu->language == language_cplus
6961 || cu->language == language_java)
6962 ? &objfile->global_psymbols
6963 : &objfile->static_psymbols,
6964 0, (CORE_ADDR) 0, cu->language, objfile);
6970 xfree (built_actual_name);
6973 /* Read a partial die corresponding to a namespace; also, add a symbol
6974 corresponding to that namespace to the symbol table. NAMESPACE is
6975 the name of the enclosing namespace. */
6978 add_partial_namespace (struct partial_die_info *pdi,
6979 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6980 int need_pc, struct dwarf2_cu *cu)
6982 /* Add a symbol for the namespace. */
6984 add_partial_symbol (pdi, cu);
6986 /* Now scan partial symbols in that namespace. */
6988 if (pdi->has_children)
6989 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
6992 /* Read a partial die corresponding to a Fortran module. */
6995 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
6996 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
6998 /* Add a symbol for the namespace. */
7000 add_partial_symbol (pdi, cu);
7002 /* Now scan partial symbols in that module. */
7004 if (pdi->has_children)
7005 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
7008 /* Read a partial die corresponding to a subprogram and create a partial
7009 symbol for that subprogram. When the CU language allows it, this
7010 routine also defines a partial symbol for each nested subprogram
7011 that this subprogram contains.
7013 DIE my also be a lexical block, in which case we simply search
7014 recursively for suprograms defined inside that lexical block.
7015 Again, this is only performed when the CU language allows this
7016 type of definitions. */
7019 add_partial_subprogram (struct partial_die_info *pdi,
7020 CORE_ADDR *lowpc, CORE_ADDR *highpc,
7021 int need_pc, struct dwarf2_cu *cu)
7023 if (pdi->tag == DW_TAG_subprogram)
7025 if (pdi->has_pc_info)
7027 if (pdi->lowpc < *lowpc)
7028 *lowpc = pdi->lowpc;
7029 if (pdi->highpc > *highpc)
7030 *highpc = pdi->highpc;
7034 struct objfile *objfile = cu->objfile;
7036 baseaddr = ANOFFSET (objfile->section_offsets,
7037 SECT_OFF_TEXT (objfile));
7038 addrmap_set_empty (objfile->psymtabs_addrmap,
7039 pdi->lowpc + baseaddr,
7040 pdi->highpc - 1 + baseaddr,
7041 cu->per_cu->v.psymtab);
7045 if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined))
7047 if (!pdi->is_declaration)
7048 /* Ignore subprogram DIEs that do not have a name, they are
7049 illegal. Do not emit a complaint at this point, we will
7050 do so when we convert this psymtab into a symtab. */
7052 add_partial_symbol (pdi, cu);
7056 if (! pdi->has_children)
7059 if (cu->language == language_ada)
7061 pdi = pdi->die_child;
7064 fixup_partial_die (pdi, cu);
7065 if (pdi->tag == DW_TAG_subprogram
7066 || pdi->tag == DW_TAG_lexical_block)
7067 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
7068 pdi = pdi->die_sibling;
7073 /* Read a partial die corresponding to an enumeration type. */
7076 add_partial_enumeration (struct partial_die_info *enum_pdi,
7077 struct dwarf2_cu *cu)
7079 struct partial_die_info *pdi;
7081 if (enum_pdi->name != NULL)
7082 add_partial_symbol (enum_pdi, cu);
7084 pdi = enum_pdi->die_child;
7087 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
7088 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
7090 add_partial_symbol (pdi, cu);
7091 pdi = pdi->die_sibling;
7095 /* Return the initial uleb128 in the die at INFO_PTR. */
7098 peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr)
7100 unsigned int bytes_read;
7102 return read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7105 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7106 Return the corresponding abbrev, or NULL if the number is zero (indicating
7107 an empty DIE). In either case *BYTES_READ will be set to the length of
7108 the initial number. */
7110 static struct abbrev_info *
7111 peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read,
7112 struct dwarf2_cu *cu)
7114 bfd *abfd = cu->objfile->obfd;
7115 unsigned int abbrev_number;
7116 struct abbrev_info *abbrev;
7118 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
7120 if (abbrev_number == 0)
7123 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
7126 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
7127 abbrev_number, bfd_get_filename (abfd));
7133 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7134 Returns a pointer to the end of a series of DIEs, terminated by an empty
7135 DIE. Any children of the skipped DIEs will also be skipped. */
7137 static const gdb_byte *
7138 skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr)
7140 struct dwarf2_cu *cu = reader->cu;
7141 struct abbrev_info *abbrev;
7142 unsigned int bytes_read;
7146 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
7148 return info_ptr + bytes_read;
7150 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
7154 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7155 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7156 abbrev corresponding to that skipped uleb128 should be passed in
7157 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7160 static const gdb_byte *
7161 skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr,
7162 struct abbrev_info *abbrev)
7164 unsigned int bytes_read;
7165 struct attribute attr;
7166 bfd *abfd = reader->abfd;
7167 struct dwarf2_cu *cu = reader->cu;
7168 const gdb_byte *buffer = reader->buffer;
7169 const gdb_byte *buffer_end = reader->buffer_end;
7170 const gdb_byte *start_info_ptr = info_ptr;
7171 unsigned int form, i;
7173 for (i = 0; i < abbrev->num_attrs; i++)
7175 /* The only abbrev we care about is DW_AT_sibling. */
7176 if (abbrev->attrs[i].name == DW_AT_sibling)
7178 read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
7179 if (attr.form == DW_FORM_ref_addr)
7180 complaint (&symfile_complaints,
7181 _("ignoring absolute DW_AT_sibling"));
7184 unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off;
7185 const gdb_byte *sibling_ptr = buffer + off;
7187 if (sibling_ptr < info_ptr)
7188 complaint (&symfile_complaints,
7189 _("DW_AT_sibling points backwards"));
7190 else if (sibling_ptr > reader->buffer_end)
7191 dwarf2_section_buffer_overflow_complaint (reader->die_section);
7197 /* If it isn't DW_AT_sibling, skip this attribute. */
7198 form = abbrev->attrs[i].form;
7202 case DW_FORM_ref_addr:
7203 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7204 and later it is offset sized. */
7205 if (cu->header.version == 2)
7206 info_ptr += cu->header.addr_size;
7208 info_ptr += cu->header.offset_size;
7210 case DW_FORM_GNU_ref_alt:
7211 info_ptr += cu->header.offset_size;
7214 info_ptr += cu->header.addr_size;
7221 case DW_FORM_flag_present:
7233 case DW_FORM_ref_sig8:
7236 case DW_FORM_string:
7237 read_direct_string (abfd, info_ptr, &bytes_read);
7238 info_ptr += bytes_read;
7240 case DW_FORM_sec_offset:
7242 case DW_FORM_GNU_strp_alt:
7243 info_ptr += cu->header.offset_size;
7245 case DW_FORM_exprloc:
7247 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7248 info_ptr += bytes_read;
7250 case DW_FORM_block1:
7251 info_ptr += 1 + read_1_byte (abfd, info_ptr);
7253 case DW_FORM_block2:
7254 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
7256 case DW_FORM_block4:
7257 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
7261 case DW_FORM_ref_udata:
7262 case DW_FORM_GNU_addr_index:
7263 case DW_FORM_GNU_str_index:
7264 info_ptr = safe_skip_leb128 (info_ptr, buffer_end);
7266 case DW_FORM_indirect:
7267 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7268 info_ptr += bytes_read;
7269 /* We need to continue parsing from here, so just go back to
7271 goto skip_attribute;
7274 error (_("Dwarf Error: Cannot handle %s "
7275 "in DWARF reader [in module %s]"),
7276 dwarf_form_name (form),
7277 bfd_get_filename (abfd));
7281 if (abbrev->has_children)
7282 return skip_children (reader, info_ptr);
7287 /* Locate ORIG_PDI's sibling.
7288 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7290 static const gdb_byte *
7291 locate_pdi_sibling (const struct die_reader_specs *reader,
7292 struct partial_die_info *orig_pdi,
7293 const gdb_byte *info_ptr)
7295 /* Do we know the sibling already? */
7297 if (orig_pdi->sibling)
7298 return orig_pdi->sibling;
7300 /* Are there any children to deal with? */
7302 if (!orig_pdi->has_children)
7305 /* Skip the children the long way. */
7307 return skip_children (reader, info_ptr);
7310 /* Expand this partial symbol table into a full symbol table. SELF is
7314 dwarf2_read_symtab (struct partial_symtab *self,
7315 struct objfile *objfile)
7319 warning (_("bug: psymtab for %s is already read in."),
7326 printf_filtered (_("Reading in symbols for %s..."),
7328 gdb_flush (gdb_stdout);
7331 /* Restore our global data. */
7332 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
7334 /* If this psymtab is constructed from a debug-only objfile, the
7335 has_section_at_zero flag will not necessarily be correct. We
7336 can get the correct value for this flag by looking at the data
7337 associated with the (presumably stripped) associated objfile. */
7338 if (objfile->separate_debug_objfile_backlink)
7340 struct dwarf2_per_objfile *dpo_backlink
7341 = objfile_data (objfile->separate_debug_objfile_backlink,
7342 dwarf2_objfile_data_key);
7344 dwarf2_per_objfile->has_section_at_zero
7345 = dpo_backlink->has_section_at_zero;
7348 dwarf2_per_objfile->reading_partial_symbols = 0;
7350 psymtab_to_symtab_1 (self);
7352 /* Finish up the debug error message. */
7354 printf_filtered (_("done.\n"));
7357 process_cu_includes ();
7360 /* Reading in full CUs. */
7362 /* Add PER_CU to the queue. */
7365 queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
7366 enum language pretend_language)
7368 struct dwarf2_queue_item *item;
7371 item = xmalloc (sizeof (*item));
7372 item->per_cu = per_cu;
7373 item->pretend_language = pretend_language;
7376 if (dwarf2_queue == NULL)
7377 dwarf2_queue = item;
7379 dwarf2_queue_tail->next = item;
7381 dwarf2_queue_tail = item;
7384 /* If PER_CU is not yet queued, add it to the queue.
7385 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7387 The result is non-zero if PER_CU was queued, otherwise the result is zero
7388 meaning either PER_CU is already queued or it is already loaded.
7390 N.B. There is an invariant here that if a CU is queued then it is loaded.
7391 The caller is required to load PER_CU if we return non-zero. */
7394 maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu,
7395 struct dwarf2_per_cu_data *per_cu,
7396 enum language pretend_language)
7398 /* We may arrive here during partial symbol reading, if we need full
7399 DIEs to process an unusual case (e.g. template arguments). Do
7400 not queue PER_CU, just tell our caller to load its DIEs. */
7401 if (dwarf2_per_objfile->reading_partial_symbols)
7403 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
7408 /* Mark the dependence relation so that we don't flush PER_CU
7410 if (dependent_cu != NULL)
7411 dwarf2_add_dependence (dependent_cu, per_cu);
7413 /* If it's already on the queue, we have nothing to do. */
7417 /* If the compilation unit is already loaded, just mark it as
7419 if (per_cu->cu != NULL)
7421 per_cu->cu->last_used = 0;
7425 /* Add it to the queue. */
7426 queue_comp_unit (per_cu, pretend_language);
7431 /* Process the queue. */
7434 process_queue (void)
7436 struct dwarf2_queue_item *item, *next_item;
7438 if (dwarf2_read_debug)
7440 fprintf_unfiltered (gdb_stdlog,
7441 "Expanding one or more symtabs of objfile %s ...\n",
7442 objfile_name (dwarf2_per_objfile->objfile));
7445 /* The queue starts out with one item, but following a DIE reference
7446 may load a new CU, adding it to the end of the queue. */
7447 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
7449 if (dwarf2_per_objfile->using_index
7450 ? !item->per_cu->v.quick->symtab
7451 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
7453 struct dwarf2_per_cu_data *per_cu = item->per_cu;
7454 unsigned int debug_print_threshold;
7457 if (per_cu->is_debug_types)
7459 struct signatured_type *sig_type =
7460 (struct signatured_type *) per_cu;
7462 sprintf (buf, "TU %s at offset 0x%x",
7463 hex_string (sig_type->signature),
7464 per_cu->offset.sect_off);
7465 /* There can be 100s of TUs.
7466 Only print them in verbose mode. */
7467 debug_print_threshold = 2;
7471 sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off);
7472 debug_print_threshold = 1;
7475 if (dwarf2_read_debug >= debug_print_threshold)
7476 fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf);
7478 if (per_cu->is_debug_types)
7479 process_full_type_unit (per_cu, item->pretend_language);
7481 process_full_comp_unit (per_cu, item->pretend_language);
7483 if (dwarf2_read_debug >= debug_print_threshold)
7484 fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf);
7487 item->per_cu->queued = 0;
7488 next_item = item->next;
7492 dwarf2_queue_tail = NULL;
7494 if (dwarf2_read_debug)
7496 fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n",
7497 objfile_name (dwarf2_per_objfile->objfile));
7501 /* Free all allocated queue entries. This function only releases anything if
7502 an error was thrown; if the queue was processed then it would have been
7503 freed as we went along. */
7506 dwarf2_release_queue (void *dummy)
7508 struct dwarf2_queue_item *item, *last;
7510 item = dwarf2_queue;
7513 /* Anything still marked queued is likely to be in an
7514 inconsistent state, so discard it. */
7515 if (item->per_cu->queued)
7517 if (item->per_cu->cu != NULL)
7518 free_one_cached_comp_unit (item->per_cu);
7519 item->per_cu->queued = 0;
7527 dwarf2_queue = dwarf2_queue_tail = NULL;
7530 /* Read in full symbols for PST, and anything it depends on. */
7533 psymtab_to_symtab_1 (struct partial_symtab *pst)
7535 struct dwarf2_per_cu_data *per_cu;
7541 for (i = 0; i < pst->number_of_dependencies; i++)
7542 if (!pst->dependencies[i]->readin
7543 && pst->dependencies[i]->user == NULL)
7545 /* Inform about additional files that need to be read in. */
7548 /* FIXME: i18n: Need to make this a single string. */
7549 fputs_filtered (" ", gdb_stdout);
7551 fputs_filtered ("and ", gdb_stdout);
7553 printf_filtered ("%s...", pst->dependencies[i]->filename);
7554 wrap_here (""); /* Flush output. */
7555 gdb_flush (gdb_stdout);
7557 psymtab_to_symtab_1 (pst->dependencies[i]);
7560 per_cu = pst->read_symtab_private;
7564 /* It's an include file, no symbols to read for it.
7565 Everything is in the parent symtab. */
7570 dw2_do_instantiate_symtab (per_cu);
7573 /* Trivial hash function for die_info: the hash value of a DIE
7574 is its offset in .debug_info for this objfile. */
7577 die_hash (const void *item)
7579 const struct die_info *die = item;
7581 return die->offset.sect_off;
7584 /* Trivial comparison function for die_info structures: two DIEs
7585 are equal if they have the same offset. */
7588 die_eq (const void *item_lhs, const void *item_rhs)
7590 const struct die_info *die_lhs = item_lhs;
7591 const struct die_info *die_rhs = item_rhs;
7593 return die_lhs->offset.sect_off == die_rhs->offset.sect_off;
7596 /* die_reader_func for load_full_comp_unit.
7597 This is identical to read_signatured_type_reader,
7598 but is kept separate for now. */
7601 load_full_comp_unit_reader (const struct die_reader_specs *reader,
7602 const gdb_byte *info_ptr,
7603 struct die_info *comp_unit_die,
7607 struct dwarf2_cu *cu = reader->cu;
7608 enum language *language_ptr = data;
7610 gdb_assert (cu->die_hash == NULL);
7612 htab_create_alloc_ex (cu->header.length / 12,
7616 &cu->comp_unit_obstack,
7617 hashtab_obstack_allocate,
7618 dummy_obstack_deallocate);
7621 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
7622 &info_ptr, comp_unit_die);
7623 cu->dies = comp_unit_die;
7624 /* comp_unit_die is not stored in die_hash, no need. */
7626 /* We try not to read any attributes in this function, because not
7627 all CUs needed for references have been loaded yet, and symbol
7628 table processing isn't initialized. But we have to set the CU language,
7629 or we won't be able to build types correctly.
7630 Similarly, if we do not read the producer, we can not apply
7631 producer-specific interpretation. */
7632 prepare_one_comp_unit (cu, cu->dies, *language_ptr);
7635 /* Load the DIEs associated with PER_CU into memory. */
7638 load_full_comp_unit (struct dwarf2_per_cu_data *this_cu,
7639 enum language pretend_language)
7641 gdb_assert (! this_cu->is_debug_types);
7643 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
7644 load_full_comp_unit_reader, &pretend_language);
7647 /* Add a DIE to the delayed physname list. */
7650 add_to_method_list (struct type *type, int fnfield_index, int index,
7651 const char *name, struct die_info *die,
7652 struct dwarf2_cu *cu)
7654 struct delayed_method_info mi;
7656 mi.fnfield_index = fnfield_index;
7660 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
7663 /* A cleanup for freeing the delayed method list. */
7666 free_delayed_list (void *ptr)
7668 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
7669 if (cu->method_list != NULL)
7671 VEC_free (delayed_method_info, cu->method_list);
7672 cu->method_list = NULL;
7676 /* Compute the physnames of any methods on the CU's method list.
7678 The computation of method physnames is delayed in order to avoid the
7679 (bad) condition that one of the method's formal parameters is of an as yet
7683 compute_delayed_physnames (struct dwarf2_cu *cu)
7686 struct delayed_method_info *mi;
7687 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
7689 const char *physname;
7690 struct fn_fieldlist *fn_flp
7691 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
7692 physname = dwarf2_physname (mi->name, mi->die, cu);
7693 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
7697 /* Go objects should be embedded in a DW_TAG_module DIE,
7698 and it's not clear if/how imported objects will appear.
7699 To keep Go support simple until that's worked out,
7700 go back through what we've read and create something usable.
7701 We could do this while processing each DIE, and feels kinda cleaner,
7702 but that way is more invasive.
7703 This is to, for example, allow the user to type "p var" or "b main"
7704 without having to specify the package name, and allow lookups
7705 of module.object to work in contexts that use the expression
7709 fixup_go_packaging (struct dwarf2_cu *cu)
7711 char *package_name = NULL;
7712 struct pending *list;
7715 for (list = global_symbols; list != NULL; list = list->next)
7717 for (i = 0; i < list->nsyms; ++i)
7719 struct symbol *sym = list->symbol[i];
7721 if (SYMBOL_LANGUAGE (sym) == language_go
7722 && SYMBOL_CLASS (sym) == LOC_BLOCK)
7724 char *this_package_name = go_symbol_package_name (sym);
7726 if (this_package_name == NULL)
7728 if (package_name == NULL)
7729 package_name = this_package_name;
7732 if (strcmp (package_name, this_package_name) != 0)
7733 complaint (&symfile_complaints,
7734 _("Symtab %s has objects from two different Go packages: %s and %s"),
7735 (SYMBOL_SYMTAB (sym)
7736 ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym))
7737 : objfile_name (cu->objfile)),
7738 this_package_name, package_name);
7739 xfree (this_package_name);
7745 if (package_name != NULL)
7747 struct objfile *objfile = cu->objfile;
7748 const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack,
7750 strlen (package_name));
7751 struct type *type = init_type (TYPE_CODE_MODULE, 0, 0,
7752 saved_package_name, objfile);
7755 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7757 sym = allocate_symbol (objfile);
7758 SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack);
7759 SYMBOL_SET_NAMES (sym, saved_package_name,
7760 strlen (saved_package_name), 0, objfile);
7761 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7762 e.g., "main" finds the "main" module and not C's main(). */
7763 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
7764 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
7765 SYMBOL_TYPE (sym) = type;
7767 add_symbol_to_list (sym, &global_symbols);
7769 xfree (package_name);
7773 /* Return the symtab for PER_CU. This works properly regardless of
7774 whether we're using the index or psymtabs. */
7776 static struct symtab *
7777 get_symtab (struct dwarf2_per_cu_data *per_cu)
7779 return (dwarf2_per_objfile->using_index
7780 ? per_cu->v.quick->symtab
7781 : per_cu->v.psymtab->symtab);
7784 /* A helper function for computing the list of all symbol tables
7785 included by PER_CU. */
7788 recursively_compute_inclusions (VEC (symtab_ptr) **result,
7789 htab_t all_children, htab_t all_type_symtabs,
7790 struct dwarf2_per_cu_data *per_cu,
7791 struct symtab *immediate_parent)
7795 struct symtab *symtab;
7796 struct dwarf2_per_cu_data *iter;
7798 slot = htab_find_slot (all_children, per_cu, INSERT);
7801 /* This inclusion and its children have been processed. */
7806 /* Only add a CU if it has a symbol table. */
7807 symtab = get_symtab (per_cu);
7810 /* If this is a type unit only add its symbol table if we haven't
7811 seen it yet (type unit per_cu's can share symtabs). */
7812 if (per_cu->is_debug_types)
7814 slot = htab_find_slot (all_type_symtabs, symtab, INSERT);
7818 VEC_safe_push (symtab_ptr, *result, symtab);
7819 if (symtab->user == NULL)
7820 symtab->user = immediate_parent;
7825 VEC_safe_push (symtab_ptr, *result, symtab);
7826 if (symtab->user == NULL)
7827 symtab->user = immediate_parent;
7832 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter);
7835 recursively_compute_inclusions (result, all_children,
7836 all_type_symtabs, iter, symtab);
7840 /* Compute the symtab 'includes' fields for the symtab related to
7844 compute_symtab_includes (struct dwarf2_per_cu_data *per_cu)
7846 gdb_assert (! per_cu->is_debug_types);
7848 if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs))
7851 struct dwarf2_per_cu_data *per_cu_iter;
7852 struct symtab *symtab_iter;
7853 VEC (symtab_ptr) *result_symtabs = NULL;
7854 htab_t all_children, all_type_symtabs;
7855 struct symtab *symtab = get_symtab (per_cu);
7857 /* If we don't have a symtab, we can just skip this case. */
7861 all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
7862 NULL, xcalloc, xfree);
7863 all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
7864 NULL, xcalloc, xfree);
7867 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs,
7871 recursively_compute_inclusions (&result_symtabs, all_children,
7872 all_type_symtabs, per_cu_iter,
7876 /* Now we have a transitive closure of all the included symtabs. */
7877 len = VEC_length (symtab_ptr, result_symtabs);
7879 = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack,
7880 (len + 1) * sizeof (struct symtab *));
7882 VEC_iterate (symtab_ptr, result_symtabs, ix, symtab_iter);
7884 symtab->includes[ix] = symtab_iter;
7885 symtab->includes[len] = NULL;
7887 VEC_free (symtab_ptr, result_symtabs);
7888 htab_delete (all_children);
7889 htab_delete (all_type_symtabs);
7893 /* Compute the 'includes' field for the symtabs of all the CUs we just
7897 process_cu_includes (void)
7900 struct dwarf2_per_cu_data *iter;
7903 VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus,
7907 if (! iter->is_debug_types)
7908 compute_symtab_includes (iter);
7911 VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus);
7914 /* Generate full symbol information for PER_CU, whose DIEs have
7915 already been loaded into memory. */
7918 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
7919 enum language pretend_language)
7921 struct dwarf2_cu *cu = per_cu->cu;
7922 struct objfile *objfile = per_cu->objfile;
7923 CORE_ADDR lowpc, highpc;
7924 struct symtab *symtab;
7925 struct cleanup *back_to, *delayed_list_cleanup;
7927 struct block *static_block;
7929 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7932 back_to = make_cleanup (really_free_pendings, NULL);
7933 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
7935 cu->list_in_scope = &file_symbols;
7937 cu->language = pretend_language;
7938 cu->language_defn = language_def (cu->language);
7940 /* Do line number decoding in read_file_scope () */
7941 process_die (cu->dies, cu);
7943 /* For now fudge the Go package. */
7944 if (cu->language == language_go)
7945 fixup_go_packaging (cu);
7947 /* Now that we have processed all the DIEs in the CU, all the types
7948 should be complete, and it should now be safe to compute all of the
7950 compute_delayed_physnames (cu);
7951 do_cleanups (delayed_list_cleanup);
7953 /* Some compilers don't define a DW_AT_high_pc attribute for the
7954 compilation unit. If the DW_AT_high_pc is missing, synthesize
7955 it, by scanning the DIE's below the compilation unit. */
7956 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
7959 = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1);
7961 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7962 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7963 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7964 addrmap to help ensure it has an accurate map of pc values belonging to
7966 dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu);
7968 symtab = end_symtab_from_static_block (static_block, objfile,
7969 SECT_OFF_TEXT (objfile), 0);
7973 int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer);
7975 /* Set symtab language to language from DW_AT_language. If the
7976 compilation is from a C file generated by language preprocessors, do
7977 not set the language if it was already deduced by start_subfile. */
7978 if (!(cu->language == language_c && symtab->language != language_c))
7979 symtab->language = cu->language;
7981 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7982 produce DW_AT_location with location lists but it can be possibly
7983 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7984 there were bugs in prologue debug info, fixed later in GCC-4.5
7985 by "unwind info for epilogues" patch (which is not directly related).
7987 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7988 needed, it would be wrong due to missing DW_AT_producer there.
7990 Still one can confuse GDB by using non-standard GCC compilation
7991 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7993 if (cu->has_loclist && gcc_4_minor >= 5)
7994 symtab->locations_valid = 1;
7996 if (gcc_4_minor >= 5)
7997 symtab->epilogue_unwind_valid = 1;
7999 symtab->call_site_htab = cu->call_site_htab;
8002 if (dwarf2_per_objfile->using_index)
8003 per_cu->v.quick->symtab = symtab;
8006 struct partial_symtab *pst = per_cu->v.psymtab;
8007 pst->symtab = symtab;
8011 /* Push it for inclusion processing later. */
8012 VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu);
8014 do_cleanups (back_to);
8017 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8018 already been loaded into memory. */
8021 process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
8022 enum language pretend_language)
8024 struct dwarf2_cu *cu = per_cu->cu;
8025 struct objfile *objfile = per_cu->objfile;
8026 struct symtab *symtab;
8027 struct cleanup *back_to, *delayed_list_cleanup;
8028 struct signatured_type *sig_type;
8030 gdb_assert (per_cu->is_debug_types);
8031 sig_type = (struct signatured_type *) per_cu;
8034 back_to = make_cleanup (really_free_pendings, NULL);
8035 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
8037 cu->list_in_scope = &file_symbols;
8039 cu->language = pretend_language;
8040 cu->language_defn = language_def (cu->language);
8042 /* The symbol tables are set up in read_type_unit_scope. */
8043 process_die (cu->dies, cu);
8045 /* For now fudge the Go package. */
8046 if (cu->language == language_go)
8047 fixup_go_packaging (cu);
8049 /* Now that we have processed all the DIEs in the CU, all the types
8050 should be complete, and it should now be safe to compute all of the
8052 compute_delayed_physnames (cu);
8053 do_cleanups (delayed_list_cleanup);
8055 /* TUs share symbol tables.
8056 If this is the first TU to use this symtab, complete the construction
8057 of it with end_expandable_symtab. Otherwise, complete the addition of
8058 this TU's symbols to the existing symtab. */
8059 if (sig_type->type_unit_group->primary_symtab == NULL)
8061 symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
8062 sig_type->type_unit_group->primary_symtab = symtab;
8066 /* Set symtab language to language from DW_AT_language. If the
8067 compilation is from a C file generated by language preprocessors,
8068 do not set the language if it was already deduced by
8070 if (!(cu->language == language_c && symtab->language != language_c))
8071 symtab->language = cu->language;
8076 augment_type_symtab (objfile,
8077 sig_type->type_unit_group->primary_symtab);
8078 symtab = sig_type->type_unit_group->primary_symtab;
8081 if (dwarf2_per_objfile->using_index)
8082 per_cu->v.quick->symtab = symtab;
8085 struct partial_symtab *pst = per_cu->v.psymtab;
8086 pst->symtab = symtab;
8090 do_cleanups (back_to);
8093 /* Process an imported unit DIE. */
8096 process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
8098 struct attribute *attr;
8100 /* For now we don't handle imported units in type units. */
8101 if (cu->per_cu->is_debug_types)
8103 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8104 " supported in type units [in module %s]"),
8105 objfile_name (cu->objfile));
8108 attr = dwarf2_attr (die, DW_AT_import, cu);
8111 struct dwarf2_per_cu_data *per_cu;
8112 struct symtab *imported_symtab;
8116 offset = dwarf2_get_ref_die_offset (attr);
8117 is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz);
8118 per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile);
8120 /* If necessary, add it to the queue and load its DIEs. */
8121 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
8122 load_full_comp_unit (per_cu, cu->language);
8124 VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
8129 /* Reset the in_process bit of a die. */
8132 reset_die_in_process (void *arg)
8134 struct die_info *die = arg;
8136 die->in_process = 0;
8139 /* Process a die and its children. */
8142 process_die (struct die_info *die, struct dwarf2_cu *cu)
8144 struct cleanup *in_process;
8146 /* We should only be processing those not already in process. */
8147 gdb_assert (!die->in_process);
8149 die->in_process = 1;
8150 in_process = make_cleanup (reset_die_in_process,die);
8154 case DW_TAG_padding:
8156 case DW_TAG_compile_unit:
8157 case DW_TAG_partial_unit:
8158 read_file_scope (die, cu);
8160 case DW_TAG_type_unit:
8161 read_type_unit_scope (die, cu);
8163 case DW_TAG_subprogram:
8164 case DW_TAG_inlined_subroutine:
8165 read_func_scope (die, cu);
8167 case DW_TAG_lexical_block:
8168 case DW_TAG_try_block:
8169 case DW_TAG_catch_block:
8170 read_lexical_block_scope (die, cu);
8172 case DW_TAG_GNU_call_site:
8173 read_call_site_scope (die, cu);
8175 case DW_TAG_class_type:
8176 case DW_TAG_interface_type:
8177 case DW_TAG_structure_type:
8178 case DW_TAG_union_type:
8179 process_structure_scope (die, cu);
8181 case DW_TAG_enumeration_type:
8182 process_enumeration_scope (die, cu);
8185 /* These dies have a type, but processing them does not create
8186 a symbol or recurse to process the children. Therefore we can
8187 read them on-demand through read_type_die. */
8188 case DW_TAG_subroutine_type:
8189 case DW_TAG_set_type:
8190 case DW_TAG_array_type:
8191 case DW_TAG_pointer_type:
8192 case DW_TAG_ptr_to_member_type:
8193 case DW_TAG_reference_type:
8194 case DW_TAG_string_type:
8197 case DW_TAG_base_type:
8198 case DW_TAG_subrange_type:
8199 case DW_TAG_typedef:
8200 /* Add a typedef symbol for the type definition, if it has a
8202 new_symbol (die, read_type_die (die, cu), cu);
8204 case DW_TAG_common_block:
8205 read_common_block (die, cu);
8207 case DW_TAG_common_inclusion:
8209 case DW_TAG_namespace:
8210 cu->processing_has_namespace_info = 1;
8211 read_namespace (die, cu);
8214 cu->processing_has_namespace_info = 1;
8215 read_module (die, cu);
8217 case DW_TAG_imported_declaration:
8218 cu->processing_has_namespace_info = 1;
8219 if (read_namespace_alias (die, cu))
8221 /* The declaration is not a global namespace alias: fall through. */
8222 case DW_TAG_imported_module:
8223 cu->processing_has_namespace_info = 1;
8224 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
8225 || cu->language != language_fortran))
8226 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
8227 dwarf_tag_name (die->tag));
8228 read_import_statement (die, cu);
8231 case DW_TAG_imported_unit:
8232 process_imported_unit_die (die, cu);
8236 new_symbol (die, NULL, cu);
8240 do_cleanups (in_process);
8243 /* DWARF name computation. */
8245 /* A helper function for dwarf2_compute_name which determines whether DIE
8246 needs to have the name of the scope prepended to the name listed in the
8250 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
8252 struct attribute *attr;
8256 case DW_TAG_namespace:
8257 case DW_TAG_typedef:
8258 case DW_TAG_class_type:
8259 case DW_TAG_interface_type:
8260 case DW_TAG_structure_type:
8261 case DW_TAG_union_type:
8262 case DW_TAG_enumeration_type:
8263 case DW_TAG_enumerator:
8264 case DW_TAG_subprogram:
8266 case DW_TAG_imported_declaration:
8269 case DW_TAG_variable:
8270 case DW_TAG_constant:
8271 /* We only need to prefix "globally" visible variables. These include
8272 any variable marked with DW_AT_external or any variable that
8273 lives in a namespace. [Variables in anonymous namespaces
8274 require prefixing, but they are not DW_AT_external.] */
8276 if (dwarf2_attr (die, DW_AT_specification, cu))
8278 struct dwarf2_cu *spec_cu = cu;
8280 return die_needs_namespace (die_specification (die, &spec_cu),
8284 attr = dwarf2_attr (die, DW_AT_external, cu);
8285 if (attr == NULL && die->parent->tag != DW_TAG_namespace
8286 && die->parent->tag != DW_TAG_module)
8288 /* A variable in a lexical block of some kind does not need a
8289 namespace, even though in C++ such variables may be external
8290 and have a mangled name. */
8291 if (die->parent->tag == DW_TAG_lexical_block
8292 || die->parent->tag == DW_TAG_try_block
8293 || die->parent->tag == DW_TAG_catch_block
8294 || die->parent->tag == DW_TAG_subprogram)
8303 /* Retrieve the last character from a mem_file. */
8306 do_ui_file_peek_last (void *object, const char *buffer, long length)
8308 char *last_char_p = (char *) object;
8311 *last_char_p = buffer[length - 1];
8314 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8315 compute the physname for the object, which include a method's:
8316 - formal parameters (C++/Java),
8317 - receiver type (Go),
8318 - return type (Java).
8320 The term "physname" is a bit confusing.
8321 For C++, for example, it is the demangled name.
8322 For Go, for example, it's the mangled name.
8324 For Ada, return the DIE's linkage name rather than the fully qualified
8325 name. PHYSNAME is ignored..
8327 The result is allocated on the objfile_obstack and canonicalized. */
8330 dwarf2_compute_name (const char *name,
8331 struct die_info *die, struct dwarf2_cu *cu,
8334 struct objfile *objfile = cu->objfile;
8337 name = dwarf2_name (die, cu);
8339 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8340 compute it by typename_concat inside GDB. */
8341 if (cu->language == language_ada
8342 || (cu->language == language_fortran && physname))
8344 /* For Ada unit, we prefer the linkage name over the name, as
8345 the former contains the exported name, which the user expects
8346 to be able to reference. Ideally, we want the user to be able
8347 to reference this entity using either natural or linkage name,
8348 but we haven't started looking at this enhancement yet. */
8349 struct attribute *attr;
8351 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
8353 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
8354 if (attr && DW_STRING (attr))
8355 return DW_STRING (attr);
8358 /* These are the only languages we know how to qualify names in. */
8360 && (cu->language == language_cplus || cu->language == language_java
8361 || cu->language == language_fortran))
8363 if (die_needs_namespace (die, cu))
8367 struct ui_file *buf;
8369 prefix = determine_prefix (die, cu);
8370 buf = mem_fileopen ();
8371 if (*prefix != '\0')
8373 char *prefixed_name = typename_concat (NULL, prefix, name,
8376 fputs_unfiltered (prefixed_name, buf);
8377 xfree (prefixed_name);
8380 fputs_unfiltered (name, buf);
8382 /* Template parameters may be specified in the DIE's DW_AT_name, or
8383 as children with DW_TAG_template_type_param or
8384 DW_TAG_value_type_param. If the latter, add them to the name
8385 here. If the name already has template parameters, then
8386 skip this step; some versions of GCC emit both, and
8387 it is more efficient to use the pre-computed name.
8389 Something to keep in mind about this process: it is very
8390 unlikely, or in some cases downright impossible, to produce
8391 something that will match the mangled name of a function.
8392 If the definition of the function has the same debug info,
8393 we should be able to match up with it anyway. But fallbacks
8394 using the minimal symbol, for instance to find a method
8395 implemented in a stripped copy of libstdc++, will not work.
8396 If we do not have debug info for the definition, we will have to
8397 match them up some other way.
8399 When we do name matching there is a related problem with function
8400 templates; two instantiated function templates are allowed to
8401 differ only by their return types, which we do not add here. */
8403 if (cu->language == language_cplus && strchr (name, '<') == NULL)
8405 struct attribute *attr;
8406 struct die_info *child;
8409 die->building_fullname = 1;
8411 for (child = die->child; child != NULL; child = child->sibling)
8415 const gdb_byte *bytes;
8416 struct dwarf2_locexpr_baton *baton;
8419 if (child->tag != DW_TAG_template_type_param
8420 && child->tag != DW_TAG_template_value_param)
8425 fputs_unfiltered ("<", buf);
8429 fputs_unfiltered (", ", buf);
8431 attr = dwarf2_attr (child, DW_AT_type, cu);
8434 complaint (&symfile_complaints,
8435 _("template parameter missing DW_AT_type"));
8436 fputs_unfiltered ("UNKNOWN_TYPE", buf);
8439 type = die_type (child, cu);
8441 if (child->tag == DW_TAG_template_type_param)
8443 c_print_type (type, "", buf, -1, 0, &type_print_raw_options);
8447 attr = dwarf2_attr (child, DW_AT_const_value, cu);
8450 complaint (&symfile_complaints,
8451 _("template parameter missing "
8452 "DW_AT_const_value"));
8453 fputs_unfiltered ("UNKNOWN_VALUE", buf);
8457 dwarf2_const_value_attr (attr, type, name,
8458 &cu->comp_unit_obstack, cu,
8459 &value, &bytes, &baton);
8461 if (TYPE_NOSIGN (type))
8462 /* GDB prints characters as NUMBER 'CHAR'. If that's
8463 changed, this can use value_print instead. */
8464 c_printchar (value, type, buf);
8467 struct value_print_options opts;
8470 v = dwarf2_evaluate_loc_desc (type, NULL,
8474 else if (bytes != NULL)
8476 v = allocate_value (type);
8477 memcpy (value_contents_writeable (v), bytes,
8478 TYPE_LENGTH (type));
8481 v = value_from_longest (type, value);
8483 /* Specify decimal so that we do not depend on
8485 get_formatted_print_options (&opts, 'd');
8487 value_print (v, buf, &opts);
8493 die->building_fullname = 0;
8497 /* Close the argument list, with a space if necessary
8498 (nested templates). */
8499 char last_char = '\0';
8500 ui_file_put (buf, do_ui_file_peek_last, &last_char);
8501 if (last_char == '>')
8502 fputs_unfiltered (" >", buf);
8504 fputs_unfiltered (">", buf);
8508 /* For Java and C++ methods, append formal parameter type
8509 information, if PHYSNAME. */
8511 if (physname && die->tag == DW_TAG_subprogram
8512 && (cu->language == language_cplus
8513 || cu->language == language_java))
8515 struct type *type = read_type_die (die, cu);
8517 c_type_print_args (type, buf, 1, cu->language,
8518 &type_print_raw_options);
8520 if (cu->language == language_java)
8522 /* For java, we must append the return type to method
8524 if (die->tag == DW_TAG_subprogram)
8525 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
8526 0, 0, &type_print_raw_options);
8528 else if (cu->language == language_cplus)
8530 /* Assume that an artificial first parameter is
8531 "this", but do not crash if it is not. RealView
8532 marks unnamed (and thus unused) parameters as
8533 artificial; there is no way to differentiate
8535 if (TYPE_NFIELDS (type) > 0
8536 && TYPE_FIELD_ARTIFICIAL (type, 0)
8537 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
8538 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type,
8540 fputs_unfiltered (" const", buf);
8544 name = ui_file_obsavestring (buf, &objfile->objfile_obstack,
8546 ui_file_delete (buf);
8548 if (cu->language == language_cplus)
8551 = dwarf2_canonicalize_name (name, cu,
8552 &objfile->objfile_obstack);
8563 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8564 If scope qualifiers are appropriate they will be added. The result
8565 will be allocated on the objfile_obstack, or NULL if the DIE does
8566 not have a name. NAME may either be from a previous call to
8567 dwarf2_name or NULL.
8569 The output string will be canonicalized (if C++/Java). */
8572 dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu)
8574 return dwarf2_compute_name (name, die, cu, 0);
8577 /* Construct a physname for the given DIE in CU. NAME may either be
8578 from a previous call to dwarf2_name or NULL. The result will be
8579 allocated on the objfile_objstack or NULL if the DIE does not have a
8582 The output string will be canonicalized (if C++/Java). */
8585 dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu)
8587 struct objfile *objfile = cu->objfile;
8588 struct attribute *attr;
8589 const char *retval, *mangled = NULL, *canon = NULL;
8590 struct cleanup *back_to;
8593 /* In this case dwarf2_compute_name is just a shortcut not building anything
8595 if (!die_needs_namespace (die, cu))
8596 return dwarf2_compute_name (name, die, cu, 1);
8598 back_to = make_cleanup (null_cleanup, NULL);
8600 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
8602 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
8604 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8606 if (attr && DW_STRING (attr))
8610 mangled = DW_STRING (attr);
8612 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8613 type. It is easier for GDB users to search for such functions as
8614 `name(params)' than `long name(params)'. In such case the minimal
8615 symbol names do not match the full symbol names but for template
8616 functions there is never a need to look up their definition from their
8617 declaration so the only disadvantage remains the minimal symbol
8618 variant `long name(params)' does not have the proper inferior type.
8621 if (cu->language == language_go)
8623 /* This is a lie, but we already lie to the caller new_symbol_full.
8624 new_symbol_full assumes we return the mangled name.
8625 This just undoes that lie until things are cleaned up. */
8630 demangled = gdb_demangle (mangled,
8631 (DMGL_PARAMS | DMGL_ANSI
8632 | (cu->language == language_java
8633 ? DMGL_JAVA | DMGL_RET_POSTFIX
8638 make_cleanup (xfree, demangled);
8648 if (canon == NULL || check_physname)
8650 const char *physname = dwarf2_compute_name (name, die, cu, 1);
8652 if (canon != NULL && strcmp (physname, canon) != 0)
8654 /* It may not mean a bug in GDB. The compiler could also
8655 compute DW_AT_linkage_name incorrectly. But in such case
8656 GDB would need to be bug-to-bug compatible. */
8658 complaint (&symfile_complaints,
8659 _("Computed physname <%s> does not match demangled <%s> "
8660 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8661 physname, canon, mangled, die->offset.sect_off,
8662 objfile_name (objfile));
8664 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8665 is available here - over computed PHYSNAME. It is safer
8666 against both buggy GDB and buggy compilers. */
8680 retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval));
8682 do_cleanups (back_to);
8686 /* Inspect DIE in CU for a namespace alias. If one exists, record
8687 a new symbol for it.
8689 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8692 read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu)
8694 struct attribute *attr;
8696 /* If the die does not have a name, this is not a namespace
8698 attr = dwarf2_attr (die, DW_AT_name, cu);
8702 struct die_info *d = die;
8703 struct dwarf2_cu *imported_cu = cu;
8705 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8706 keep inspecting DIEs until we hit the underlying import. */
8707 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8708 for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num)
8710 attr = dwarf2_attr (d, DW_AT_import, cu);
8714 d = follow_die_ref (d, attr, &imported_cu);
8715 if (d->tag != DW_TAG_imported_declaration)
8719 if (num == MAX_NESTED_IMPORTED_DECLARATIONS)
8721 complaint (&symfile_complaints,
8722 _("DIE at 0x%x has too many recursively imported "
8723 "declarations"), d->offset.sect_off);
8730 sect_offset offset = dwarf2_get_ref_die_offset (attr);
8732 type = get_die_type_at_offset (offset, cu->per_cu);
8733 if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
8735 /* This declaration is a global namespace alias. Add
8736 a symbol for it whose type is the aliased namespace. */
8737 new_symbol (die, type, cu);
8746 /* Read the import statement specified by the given die and record it. */
8749 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
8751 struct objfile *objfile = cu->objfile;
8752 struct attribute *import_attr;
8753 struct die_info *imported_die, *child_die;
8754 struct dwarf2_cu *imported_cu;
8755 const char *imported_name;
8756 const char *imported_name_prefix;
8757 const char *canonical_name;
8758 const char *import_alias;
8759 const char *imported_declaration = NULL;
8760 const char *import_prefix;
8761 VEC (const_char_ptr) *excludes = NULL;
8762 struct cleanup *cleanups;
8764 import_attr = dwarf2_attr (die, DW_AT_import, cu);
8765 if (import_attr == NULL)
8767 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
8768 dwarf_tag_name (die->tag));
8773 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
8774 imported_name = dwarf2_name (imported_die, imported_cu);
8775 if (imported_name == NULL)
8777 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8779 The import in the following code:
8793 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8794 <52> DW_AT_decl_file : 1
8795 <53> DW_AT_decl_line : 6
8796 <54> DW_AT_import : <0x75>
8797 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8799 <5b> DW_AT_decl_file : 1
8800 <5c> DW_AT_decl_line : 2
8801 <5d> DW_AT_type : <0x6e>
8803 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8804 <76> DW_AT_byte_size : 4
8805 <77> DW_AT_encoding : 5 (signed)
8807 imports the wrong die ( 0x75 instead of 0x58 ).
8808 This case will be ignored until the gcc bug is fixed. */
8812 /* Figure out the local name after import. */
8813 import_alias = dwarf2_name (die, cu);
8815 /* Figure out where the statement is being imported to. */
8816 import_prefix = determine_prefix (die, cu);
8818 /* Figure out what the scope of the imported die is and prepend it
8819 to the name of the imported die. */
8820 imported_name_prefix = determine_prefix (imported_die, imported_cu);
8822 if (imported_die->tag != DW_TAG_namespace
8823 && imported_die->tag != DW_TAG_module)
8825 imported_declaration = imported_name;
8826 canonical_name = imported_name_prefix;
8828 else if (strlen (imported_name_prefix) > 0)
8829 canonical_name = obconcat (&objfile->objfile_obstack,
8830 imported_name_prefix, "::", imported_name,
8833 canonical_name = imported_name;
8835 cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes);
8837 if (die->tag == DW_TAG_imported_module && cu->language == language_fortran)
8838 for (child_die = die->child; child_die && child_die->tag;
8839 child_die = sibling_die (child_die))
8841 /* DWARF-4: A Fortran use statement with a “rename list” may be
8842 represented by an imported module entry with an import attribute
8843 referring to the module and owned entries corresponding to those
8844 entities that are renamed as part of being imported. */
8846 if (child_die->tag != DW_TAG_imported_declaration)
8848 complaint (&symfile_complaints,
8849 _("child DW_TAG_imported_declaration expected "
8850 "- DIE at 0x%x [in module %s]"),
8851 child_die->offset.sect_off, objfile_name (objfile));
8855 import_attr = dwarf2_attr (child_die, DW_AT_import, cu);
8856 if (import_attr == NULL)
8858 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
8859 dwarf_tag_name (child_die->tag));
8864 imported_die = follow_die_ref_or_sig (child_die, import_attr,
8866 imported_name = dwarf2_name (imported_die, imported_cu);
8867 if (imported_name == NULL)
8869 complaint (&symfile_complaints,
8870 _("child DW_TAG_imported_declaration has unknown "
8871 "imported name - DIE at 0x%x [in module %s]"),
8872 child_die->offset.sect_off, objfile_name (objfile));
8876 VEC_safe_push (const_char_ptr, excludes, imported_name);
8878 process_die (child_die, cu);
8881 cp_add_using_directive (import_prefix,
8884 imported_declaration,
8887 &objfile->objfile_obstack);
8889 do_cleanups (cleanups);
8892 /* Cleanup function for handle_DW_AT_stmt_list. */
8895 free_cu_line_header (void *arg)
8897 struct dwarf2_cu *cu = arg;
8899 free_line_header (cu->line_header);
8900 cu->line_header = NULL;
8903 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8904 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8905 this, it was first present in GCC release 4.3.0. */
8908 producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu)
8910 if (!cu->checked_producer)
8911 check_producer (cu);
8913 return cu->producer_is_gcc_lt_4_3;
8917 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
8918 const char **name, const char **comp_dir)
8920 struct attribute *attr;
8925 /* Find the filename. Do not use dwarf2_name here, since the filename
8926 is not a source language identifier. */
8927 attr = dwarf2_attr (die, DW_AT_name, cu);
8930 *name = DW_STRING (attr);
8933 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
8935 *comp_dir = DW_STRING (attr);
8936 else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL
8937 && IS_ABSOLUTE_PATH (*name))
8939 char *d = ldirname (*name);
8943 make_cleanup (xfree, d);
8945 if (*comp_dir != NULL)
8947 /* Irix 6.2 native cc prepends <machine>.: to the compilation
8948 directory, get rid of it. */
8949 char *cp = strchr (*comp_dir, ':');
8951 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
8956 *name = "<unknown>";
8959 /* Handle DW_AT_stmt_list for a compilation unit.
8960 DIE is the DW_TAG_compile_unit die for CU.
8961 COMP_DIR is the compilation directory.
8962 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
8965 handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu,
8966 const char *comp_dir) /* ARI: editCase function */
8968 struct attribute *attr;
8970 gdb_assert (! cu->per_cu->is_debug_types);
8972 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
8975 unsigned int line_offset = DW_UNSND (attr);
8976 struct line_header *line_header
8977 = dwarf_decode_line_header (line_offset, cu);
8981 cu->line_header = line_header;
8982 make_cleanup (free_cu_line_header, cu);
8983 dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1);
8988 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
8991 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
8993 struct objfile *objfile = dwarf2_per_objfile->objfile;
8994 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
8995 CORE_ADDR lowpc = ((CORE_ADDR) -1);
8996 CORE_ADDR highpc = ((CORE_ADDR) 0);
8997 struct attribute *attr;
8998 const char *name = NULL;
8999 const char *comp_dir = NULL;
9000 struct die_info *child_die;
9001 bfd *abfd = objfile->obfd;
9004 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9006 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
9008 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9009 from finish_block. */
9010 if (lowpc == ((CORE_ADDR) -1))
9015 find_file_and_directory (die, cu, &name, &comp_dir);
9017 prepare_one_comp_unit (cu, die, cu->language);
9019 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9020 standardised yet. As a workaround for the language detection we fall
9021 back to the DW_AT_producer string. */
9022 if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
9023 cu->language = language_opencl;
9025 /* Similar hack for Go. */
9026 if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL)
9027 set_cu_language (DW_LANG_Go, cu);
9029 dwarf2_start_symtab (cu, name, comp_dir, lowpc);
9031 /* Decode line number information if present. We do this before
9032 processing child DIEs, so that the line header table is available
9033 for DW_AT_decl_file. */
9034 handle_DW_AT_stmt_list (die, cu, comp_dir);
9036 /* Process all dies in compilation unit. */
9037 if (die->child != NULL)
9039 child_die = die->child;
9040 while (child_die && child_die->tag)
9042 process_die (child_die, cu);
9043 child_die = sibling_die (child_die);
9047 /* Decode macro information, if present. Dwarf 2 macro information
9048 refers to information in the line number info statement program
9049 header, so we can only read it if we've read the header
9051 attr = dwarf2_attr (die, DW_AT_GNU_macros, cu);
9052 if (attr && cu->line_header)
9054 if (dwarf2_attr (die, DW_AT_macro_info, cu))
9055 complaint (&symfile_complaints,
9056 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9058 dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1);
9062 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
9063 if (attr && cu->line_header)
9065 unsigned int macro_offset = DW_UNSND (attr);
9067 dwarf_decode_macros (cu, macro_offset, comp_dir, 0);
9071 do_cleanups (back_to);
9074 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9075 Create the set of symtabs used by this TU, or if this TU is sharing
9076 symtabs with another TU and the symtabs have already been created
9077 then restore those symtabs in the line header.
9078 We don't need the pc/line-number mapping for type units. */
9081 setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
9083 struct objfile *objfile = dwarf2_per_objfile->objfile;
9084 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
9085 struct type_unit_group *tu_group;
9087 struct line_header *lh;
9088 struct attribute *attr;
9089 unsigned int i, line_offset;
9090 struct signatured_type *sig_type;
9092 gdb_assert (per_cu->is_debug_types);
9093 sig_type = (struct signatured_type *) per_cu;
9095 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
9097 /* If we're using .gdb_index (includes -readnow) then
9098 per_cu->type_unit_group may not have been set up yet. */
9099 if (sig_type->type_unit_group == NULL)
9100 sig_type->type_unit_group = get_type_unit_group (cu, attr);
9101 tu_group = sig_type->type_unit_group;
9103 /* If we've already processed this stmt_list there's no real need to
9104 do it again, we could fake it and just recreate the part we need
9105 (file name,index -> symtab mapping). If data shows this optimization
9106 is useful we can do it then. */
9107 first_time = tu_group->primary_symtab == NULL;
9109 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9114 line_offset = DW_UNSND (attr);
9115 lh = dwarf_decode_line_header (line_offset, cu);
9120 dwarf2_start_symtab (cu, "", NULL, 0);
9123 gdb_assert (tu_group->symtabs == NULL);
9126 /* Note: The primary symtab will get allocated at the end. */
9130 cu->line_header = lh;
9131 make_cleanup (free_cu_line_header, cu);
9135 dwarf2_start_symtab (cu, "", NULL, 0);
9137 tu_group->num_symtabs = lh->num_file_names;
9138 tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names);
9140 for (i = 0; i < lh->num_file_names; ++i)
9142 const char *dir = NULL;
9143 struct file_entry *fe = &lh->file_names[i];
9146 dir = lh->include_dirs[fe->dir_index - 1];
9147 dwarf2_start_subfile (fe->name, dir, NULL);
9149 /* Note: We don't have to watch for the main subfile here, type units
9150 don't have DW_AT_name. */
9152 if (current_subfile->symtab == NULL)
9154 /* NOTE: start_subfile will recognize when it's been passed
9155 a file it has already seen. So we can't assume there's a
9156 simple mapping from lh->file_names to subfiles,
9157 lh->file_names may contain dups. */
9158 current_subfile->symtab = allocate_symtab (current_subfile->name,
9162 fe->symtab = current_subfile->symtab;
9163 tu_group->symtabs[i] = fe->symtab;
9170 for (i = 0; i < lh->num_file_names; ++i)
9172 struct file_entry *fe = &lh->file_names[i];
9174 fe->symtab = tu_group->symtabs[i];
9178 /* The main symtab is allocated last. Type units don't have DW_AT_name
9179 so they don't have a "real" (so to speak) symtab anyway.
9180 There is later code that will assign the main symtab to all symbols
9181 that don't have one. We need to handle the case of a symbol with a
9182 missing symtab (DW_AT_decl_file) anyway. */
9185 /* Process DW_TAG_type_unit.
9186 For TUs we want to skip the first top level sibling if it's not the
9187 actual type being defined by this TU. In this case the first top
9188 level sibling is there to provide context only. */
9191 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
9193 struct die_info *child_die;
9195 prepare_one_comp_unit (cu, die, language_minimal);
9197 /* Initialize (or reinitialize) the machinery for building symtabs.
9198 We do this before processing child DIEs, so that the line header table
9199 is available for DW_AT_decl_file. */
9200 setup_type_unit_groups (die, cu);
9202 if (die->child != NULL)
9204 child_die = die->child;
9205 while (child_die && child_die->tag)
9207 process_die (child_die, cu);
9208 child_die = sibling_die (child_die);
9215 http://gcc.gnu.org/wiki/DebugFission
9216 http://gcc.gnu.org/wiki/DebugFissionDWP
9218 To simplify handling of both DWO files ("object" files with the DWARF info)
9219 and DWP files (a file with the DWOs packaged up into one file), we treat
9220 DWP files as having a collection of virtual DWO files. */
9223 hash_dwo_file (const void *item)
9225 const struct dwo_file *dwo_file = item;
9228 hash = htab_hash_string (dwo_file->dwo_name);
9229 if (dwo_file->comp_dir != NULL)
9230 hash += htab_hash_string (dwo_file->comp_dir);
9235 eq_dwo_file (const void *item_lhs, const void *item_rhs)
9237 const struct dwo_file *lhs = item_lhs;
9238 const struct dwo_file *rhs = item_rhs;
9240 if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0)
9242 if (lhs->comp_dir == NULL || rhs->comp_dir == NULL)
9243 return lhs->comp_dir == rhs->comp_dir;
9244 return strcmp (lhs->comp_dir, rhs->comp_dir) == 0;
9247 /* Allocate a hash table for DWO files. */
9250 allocate_dwo_file_hash_table (void)
9252 struct objfile *objfile = dwarf2_per_objfile->objfile;
9254 return htab_create_alloc_ex (41,
9258 &objfile->objfile_obstack,
9259 hashtab_obstack_allocate,
9260 dummy_obstack_deallocate);
9263 /* Lookup DWO file DWO_NAME. */
9266 lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir)
9268 struct dwo_file find_entry;
9271 if (dwarf2_per_objfile->dwo_files == NULL)
9272 dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table ();
9274 memset (&find_entry, 0, sizeof (find_entry));
9275 find_entry.dwo_name = dwo_name;
9276 find_entry.comp_dir = comp_dir;
9277 slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT);
9283 hash_dwo_unit (const void *item)
9285 const struct dwo_unit *dwo_unit = item;
9287 /* This drops the top 32 bits of the id, but is ok for a hash. */
9288 return dwo_unit->signature;
9292 eq_dwo_unit (const void *item_lhs, const void *item_rhs)
9294 const struct dwo_unit *lhs = item_lhs;
9295 const struct dwo_unit *rhs = item_rhs;
9297 /* The signature is assumed to be unique within the DWO file.
9298 So while object file CU dwo_id's always have the value zero,
9299 that's OK, assuming each object file DWO file has only one CU,
9300 and that's the rule for now. */
9301 return lhs->signature == rhs->signature;
9304 /* Allocate a hash table for DWO CUs,TUs.
9305 There is one of these tables for each of CUs,TUs for each DWO file. */
9308 allocate_dwo_unit_table (struct objfile *objfile)
9310 /* Start out with a pretty small number.
9311 Generally DWO files contain only one CU and maybe some TUs. */
9312 return htab_create_alloc_ex (3,
9316 &objfile->objfile_obstack,
9317 hashtab_obstack_allocate,
9318 dummy_obstack_deallocate);
9321 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9323 struct create_dwo_cu_data
9325 struct dwo_file *dwo_file;
9326 struct dwo_unit dwo_unit;
9329 /* die_reader_func for create_dwo_cu. */
9332 create_dwo_cu_reader (const struct die_reader_specs *reader,
9333 const gdb_byte *info_ptr,
9334 struct die_info *comp_unit_die,
9338 struct dwarf2_cu *cu = reader->cu;
9339 struct objfile *objfile = dwarf2_per_objfile->objfile;
9340 sect_offset offset = cu->per_cu->offset;
9341 struct dwarf2_section_info *section = cu->per_cu->section;
9342 struct create_dwo_cu_data *data = datap;
9343 struct dwo_file *dwo_file = data->dwo_file;
9344 struct dwo_unit *dwo_unit = &data->dwo_unit;
9345 struct attribute *attr;
9347 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
9350 complaint (&symfile_complaints,
9351 _("Dwarf Error: debug entry at offset 0x%x is missing"
9352 " its dwo_id [in module %s]"),
9353 offset.sect_off, dwo_file->dwo_name);
9357 dwo_unit->dwo_file = dwo_file;
9358 dwo_unit->signature = DW_UNSND (attr);
9359 dwo_unit->section = section;
9360 dwo_unit->offset = offset;
9361 dwo_unit->length = cu->per_cu->length;
9363 if (dwarf2_read_debug)
9364 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n",
9365 offset.sect_off, hex_string (dwo_unit->signature));
9368 /* Create the dwo_unit for the lone CU in DWO_FILE.
9369 Note: This function processes DWO files only, not DWP files. */
9371 static struct dwo_unit *
9372 create_dwo_cu (struct dwo_file *dwo_file)
9374 struct objfile *objfile = dwarf2_per_objfile->objfile;
9375 struct dwarf2_section_info *section = &dwo_file->sections.info;
9378 const gdb_byte *info_ptr, *end_ptr;
9379 struct create_dwo_cu_data create_dwo_cu_data;
9380 struct dwo_unit *dwo_unit;
9382 dwarf2_read_section (objfile, section);
9383 info_ptr = section->buffer;
9385 if (info_ptr == NULL)
9388 /* We can't set abfd until now because the section may be empty or
9389 not present, in which case section->asection will be NULL. */
9390 abfd = get_section_bfd_owner (section);
9392 if (dwarf2_read_debug)
9394 fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n",
9395 get_section_name (section),
9396 get_section_file_name (section));
9399 create_dwo_cu_data.dwo_file = dwo_file;
9402 end_ptr = info_ptr + section->size;
9403 while (info_ptr < end_ptr)
9405 struct dwarf2_per_cu_data per_cu;
9407 memset (&create_dwo_cu_data.dwo_unit, 0,
9408 sizeof (create_dwo_cu_data.dwo_unit));
9409 memset (&per_cu, 0, sizeof (per_cu));
9410 per_cu.objfile = objfile;
9411 per_cu.is_debug_types = 0;
9412 per_cu.offset.sect_off = info_ptr - section->buffer;
9413 per_cu.section = section;
9415 init_cutu_and_read_dies_no_follow (&per_cu, dwo_file,
9416 create_dwo_cu_reader,
9417 &create_dwo_cu_data);
9419 if (create_dwo_cu_data.dwo_unit.dwo_file != NULL)
9421 /* If we've already found one, complain. We only support one
9422 because having more than one requires hacking the dwo_name of
9423 each to match, which is highly unlikely to happen. */
9424 if (dwo_unit != NULL)
9426 complaint (&symfile_complaints,
9427 _("Multiple CUs in DWO file %s [in module %s]"),
9428 dwo_file->dwo_name, objfile_name (objfile));
9432 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
9433 *dwo_unit = create_dwo_cu_data.dwo_unit;
9436 info_ptr += per_cu.length;
9442 /* DWP file .debug_{cu,tu}_index section format:
9443 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9447 Both index sections have the same format, and serve to map a 64-bit
9448 signature to a set of section numbers. Each section begins with a header,
9449 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9450 indexes, and a pool of 32-bit section numbers. The index sections will be
9451 aligned at 8-byte boundaries in the file.
9453 The index section header consists of:
9455 V, 32 bit version number
9457 N, 32 bit number of compilation units or type units in the index
9458 M, 32 bit number of slots in the hash table
9460 Numbers are recorded using the byte order of the application binary.
9462 The hash table begins at offset 16 in the section, and consists of an array
9463 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9464 order of the application binary). Unused slots in the hash table are 0.
9465 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9467 The parallel table begins immediately after the hash table
9468 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9469 array of 32-bit indexes (using the byte order of the application binary),
9470 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9471 table contains a 32-bit index into the pool of section numbers. For unused
9472 hash table slots, the corresponding entry in the parallel table will be 0.
9474 The pool of section numbers begins immediately following the hash table
9475 (at offset 16 + 12 * M from the beginning of the section). The pool of
9476 section numbers consists of an array of 32-bit words (using the byte order
9477 of the application binary). Each item in the array is indexed starting
9478 from 0. The hash table entry provides the index of the first section
9479 number in the set. Additional section numbers in the set follow, and the
9480 set is terminated by a 0 entry (section number 0 is not used in ELF).
9482 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9483 section must be the first entry in the set, and the .debug_abbrev.dwo must
9484 be the second entry. Other members of the set may follow in any order.
9490 DWP Version 2 combines all the .debug_info, etc. sections into one,
9491 and the entries in the index tables are now offsets into these sections.
9492 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9495 Index Section Contents:
9497 Hash Table of Signatures dwp_hash_table.hash_table
9498 Parallel Table of Indices dwp_hash_table.unit_table
9499 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9500 Table of Section Sizes dwp_hash_table.v2.sizes
9502 The index section header consists of:
9504 V, 32 bit version number
9505 L, 32 bit number of columns in the table of section offsets
9506 N, 32 bit number of compilation units or type units in the index
9507 M, 32 bit number of slots in the hash table
9509 Numbers are recorded using the byte order of the application binary.
9511 The hash table has the same format as version 1.
9512 The parallel table of indices has the same format as version 1,
9513 except that the entries are origin-1 indices into the table of sections
9514 offsets and the table of section sizes.
9516 The table of offsets begins immediately following the parallel table
9517 (at offset 16 + 12 * M from the beginning of the section). The table is
9518 a two-dimensional array of 32-bit words (using the byte order of the
9519 application binary), with L columns and N+1 rows, in row-major order.
9520 Each row in the array is indexed starting from 0. The first row provides
9521 a key to the remaining rows: each column in this row provides an identifier
9522 for a debug section, and the offsets in the same column of subsequent rows
9523 refer to that section. The section identifiers are:
9525 DW_SECT_INFO 1 .debug_info.dwo
9526 DW_SECT_TYPES 2 .debug_types.dwo
9527 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9528 DW_SECT_LINE 4 .debug_line.dwo
9529 DW_SECT_LOC 5 .debug_loc.dwo
9530 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9531 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9532 DW_SECT_MACRO 8 .debug_macro.dwo
9534 The offsets provided by the CU and TU index sections are the base offsets
9535 for the contributions made by each CU or TU to the corresponding section
9536 in the package file. Each CU and TU header contains an abbrev_offset
9537 field, used to find the abbreviations table for that CU or TU within the
9538 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9539 be interpreted as relative to the base offset given in the index section.
9540 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9541 should be interpreted as relative to the base offset for .debug_line.dwo,
9542 and offsets into other debug sections obtained from DWARF attributes should
9543 also be interpreted as relative to the corresponding base offset.
9545 The table of sizes begins immediately following the table of offsets.
9546 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9547 with L columns and N rows, in row-major order. Each row in the array is
9548 indexed starting from 1 (row 0 is shared by the two tables).
9552 Hash table lookup is handled the same in version 1 and 2:
9554 We assume that N and M will not exceed 2^32 - 1.
9555 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9557 Given a 64-bit compilation unit signature or a type signature S, an entry
9558 in the hash table is located as follows:
9560 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9561 the low-order k bits all set to 1.
9563 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9565 3) If the hash table entry at index H matches the signature, use that
9566 entry. If the hash table entry at index H is unused (all zeroes),
9567 terminate the search: the signature is not present in the table.
9569 4) Let H = (H + H') modulo M. Repeat at Step 3.
9571 Because M > N and H' and M are relatively prime, the search is guaranteed
9572 to stop at an unused slot or find the match. */
9574 /* Create a hash table to map DWO IDs to their CU/TU entry in
9575 .debug_{info,types}.dwo in DWP_FILE.
9576 Returns NULL if there isn't one.
9577 Note: This function processes DWP files only, not DWO files. */
9579 static struct dwp_hash_table *
9580 create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types)
9582 struct objfile *objfile = dwarf2_per_objfile->objfile;
9583 bfd *dbfd = dwp_file->dbfd;
9584 const gdb_byte *index_ptr, *index_end;
9585 struct dwarf2_section_info *index;
9586 uint32_t version, nr_columns, nr_units, nr_slots;
9587 struct dwp_hash_table *htab;
9590 index = &dwp_file->sections.tu_index;
9592 index = &dwp_file->sections.cu_index;
9594 if (dwarf2_section_empty_p (index))
9596 dwarf2_read_section (objfile, index);
9598 index_ptr = index->buffer;
9599 index_end = index_ptr + index->size;
9601 version = read_4_bytes (dbfd, index_ptr);
9604 nr_columns = read_4_bytes (dbfd, index_ptr);
9608 nr_units = read_4_bytes (dbfd, index_ptr);
9610 nr_slots = read_4_bytes (dbfd, index_ptr);
9613 if (version != 1 && version != 2)
9615 error (_("Dwarf Error: unsupported DWP file version (%s)"
9617 pulongest (version), dwp_file->name);
9619 if (nr_slots != (nr_slots & -nr_slots))
9621 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9622 " is not power of 2 [in module %s]"),
9623 pulongest (nr_slots), dwp_file->name);
9626 htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table);
9627 htab->version = version;
9628 htab->nr_columns = nr_columns;
9629 htab->nr_units = nr_units;
9630 htab->nr_slots = nr_slots;
9631 htab->hash_table = index_ptr;
9632 htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots;
9634 /* Exit early if the table is empty. */
9635 if (nr_slots == 0 || nr_units == 0
9636 || (version == 2 && nr_columns == 0))
9638 /* All must be zero. */
9639 if (nr_slots != 0 || nr_units != 0
9640 || (version == 2 && nr_columns != 0))
9642 complaint (&symfile_complaints,
9643 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9644 " all zero [in modules %s]"),
9652 htab->section_pool.v1.indices =
9653 htab->unit_table + sizeof (uint32_t) * nr_slots;
9654 /* It's harder to decide whether the section is too small in v1.
9655 V1 is deprecated anyway so we punt. */
9659 const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots;
9660 int *ids = htab->section_pool.v2.section_ids;
9661 /* Reverse map for error checking. */
9662 int ids_seen[DW_SECT_MAX + 1];
9667 error (_("Dwarf Error: bad DWP hash table, too few columns"
9668 " in section table [in module %s]"),
9671 if (nr_columns > MAX_NR_V2_DWO_SECTIONS)
9673 error (_("Dwarf Error: bad DWP hash table, too many columns"
9674 " in section table [in module %s]"),
9677 memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t));
9678 memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t));
9679 for (i = 0; i < nr_columns; ++i)
9681 int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t));
9683 if (id < DW_SECT_MIN || id > DW_SECT_MAX)
9685 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9686 " in section table [in module %s]"),
9687 id, dwp_file->name);
9689 if (ids_seen[id] != -1)
9691 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9692 " id %d in section table [in module %s]"),
9693 id, dwp_file->name);
9698 /* Must have exactly one info or types section. */
9699 if (((ids_seen[DW_SECT_INFO] != -1)
9700 + (ids_seen[DW_SECT_TYPES] != -1))
9703 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9704 " DWO info/types section [in module %s]"),
9707 /* Must have an abbrev section. */
9708 if (ids_seen[DW_SECT_ABBREV] == -1)
9710 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9711 " section [in module %s]"),
9714 htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns;
9715 htab->section_pool.v2.sizes =
9716 htab->section_pool.v2.offsets + (sizeof (uint32_t)
9717 * nr_units * nr_columns);
9718 if ((htab->section_pool.v2.sizes + (sizeof (uint32_t)
9719 * nr_units * nr_columns))
9722 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9731 /* Update SECTIONS with the data from SECTP.
9733 This function is like the other "locate" section routines that are
9734 passed to bfd_map_over_sections, but in this context the sections to
9735 read comes from the DWP V1 hash table, not the full ELF section table.
9737 The result is non-zero for success, or zero if an error was found. */
9740 locate_v1_virtual_dwo_sections (asection *sectp,
9741 struct virtual_v1_dwo_sections *sections)
9743 const struct dwop_section_names *names = &dwop_section_names;
9745 if (section_is_p (sectp->name, &names->abbrev_dwo))
9747 /* There can be only one. */
9748 if (sections->abbrev.s.asection != NULL)
9750 sections->abbrev.s.asection = sectp;
9751 sections->abbrev.size = bfd_get_section_size (sectp);
9753 else if (section_is_p (sectp->name, &names->info_dwo)
9754 || section_is_p (sectp->name, &names->types_dwo))
9756 /* There can be only one. */
9757 if (sections->info_or_types.s.asection != NULL)
9759 sections->info_or_types.s.asection = sectp;
9760 sections->info_or_types.size = bfd_get_section_size (sectp);
9762 else if (section_is_p (sectp->name, &names->line_dwo))
9764 /* There can be only one. */
9765 if (sections->line.s.asection != NULL)
9767 sections->line.s.asection = sectp;
9768 sections->line.size = bfd_get_section_size (sectp);
9770 else if (section_is_p (sectp->name, &names->loc_dwo))
9772 /* There can be only one. */
9773 if (sections->loc.s.asection != NULL)
9775 sections->loc.s.asection = sectp;
9776 sections->loc.size = bfd_get_section_size (sectp);
9778 else if (section_is_p (sectp->name, &names->macinfo_dwo))
9780 /* There can be only one. */
9781 if (sections->macinfo.s.asection != NULL)
9783 sections->macinfo.s.asection = sectp;
9784 sections->macinfo.size = bfd_get_section_size (sectp);
9786 else if (section_is_p (sectp->name, &names->macro_dwo))
9788 /* There can be only one. */
9789 if (sections->macro.s.asection != NULL)
9791 sections->macro.s.asection = sectp;
9792 sections->macro.size = bfd_get_section_size (sectp);
9794 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
9796 /* There can be only one. */
9797 if (sections->str_offsets.s.asection != NULL)
9799 sections->str_offsets.s.asection = sectp;
9800 sections->str_offsets.size = bfd_get_section_size (sectp);
9804 /* No other kind of section is valid. */
9811 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9812 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9813 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9814 This is for DWP version 1 files. */
9816 static struct dwo_unit *
9817 create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file,
9818 uint32_t unit_index,
9819 const char *comp_dir,
9820 ULONGEST signature, int is_debug_types)
9822 struct objfile *objfile = dwarf2_per_objfile->objfile;
9823 const struct dwp_hash_table *dwp_htab =
9824 is_debug_types ? dwp_file->tus : dwp_file->cus;
9825 bfd *dbfd = dwp_file->dbfd;
9826 const char *kind = is_debug_types ? "TU" : "CU";
9827 struct dwo_file *dwo_file;
9828 struct dwo_unit *dwo_unit;
9829 struct virtual_v1_dwo_sections sections;
9830 void **dwo_file_slot;
9831 char *virtual_dwo_name;
9832 struct dwarf2_section_info *cutu;
9833 struct cleanup *cleanups;
9836 gdb_assert (dwp_file->version == 1);
9838 if (dwarf2_read_debug)
9840 fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n",
9842 pulongest (unit_index), hex_string (signature),
9846 /* Fetch the sections of this DWO unit.
9847 Put a limit on the number of sections we look for so that bad data
9848 doesn't cause us to loop forever. */
9850 #define MAX_NR_V1_DWO_SECTIONS \
9851 (1 /* .debug_info or .debug_types */ \
9852 + 1 /* .debug_abbrev */ \
9853 + 1 /* .debug_line */ \
9854 + 1 /* .debug_loc */ \
9855 + 1 /* .debug_str_offsets */ \
9856 + 1 /* .debug_macro or .debug_macinfo */ \
9857 + 1 /* trailing zero */)
9859 memset (§ions, 0, sizeof (sections));
9860 cleanups = make_cleanup (null_cleanup, 0);
9862 for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i)
9865 uint32_t section_nr =
9867 dwp_htab->section_pool.v1.indices
9868 + (unit_index + i) * sizeof (uint32_t));
9870 if (section_nr == 0)
9872 if (section_nr >= dwp_file->num_sections)
9874 error (_("Dwarf Error: bad DWP hash table, section number too large"
9879 sectp = dwp_file->elf_sections[section_nr];
9880 if (! locate_v1_virtual_dwo_sections (sectp, §ions))
9882 error (_("Dwarf Error: bad DWP hash table, invalid section found"
9889 || dwarf2_section_empty_p (§ions.info_or_types)
9890 || dwarf2_section_empty_p (§ions.abbrev))
9892 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
9896 if (i == MAX_NR_V1_DWO_SECTIONS)
9898 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
9903 /* It's easier for the rest of the code if we fake a struct dwo_file and
9904 have dwo_unit "live" in that. At least for now.
9906 The DWP file can be made up of a random collection of CUs and TUs.
9907 However, for each CU + set of TUs that came from the same original DWO
9908 file, we can combine them back into a virtual DWO file to save space
9909 (fewer struct dwo_file objects to allocate). Remember that for really
9910 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
9913 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
9914 get_section_id (§ions.abbrev),
9915 get_section_id (§ions.line),
9916 get_section_id (§ions.loc),
9917 get_section_id (§ions.str_offsets));
9918 make_cleanup (xfree, virtual_dwo_name);
9919 /* Can we use an existing virtual DWO file? */
9920 dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir);
9921 /* Create one if necessary. */
9922 if (*dwo_file_slot == NULL)
9924 if (dwarf2_read_debug)
9926 fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n",
9929 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
9930 dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack,
9932 strlen (virtual_dwo_name));
9933 dwo_file->comp_dir = comp_dir;
9934 dwo_file->sections.abbrev = sections.abbrev;
9935 dwo_file->sections.line = sections.line;
9936 dwo_file->sections.loc = sections.loc;
9937 dwo_file->sections.macinfo = sections.macinfo;
9938 dwo_file->sections.macro = sections.macro;
9939 dwo_file->sections.str_offsets = sections.str_offsets;
9940 /* The "str" section is global to the entire DWP file. */
9941 dwo_file->sections.str = dwp_file->sections.str;
9942 /* The info or types section is assigned below to dwo_unit,
9943 there's no need to record it in dwo_file.
9944 Also, we can't simply record type sections in dwo_file because
9945 we record a pointer into the vector in dwo_unit. As we collect more
9946 types we'll grow the vector and eventually have to reallocate space
9947 for it, invalidating all copies of pointers into the previous
9949 *dwo_file_slot = dwo_file;
9953 if (dwarf2_read_debug)
9955 fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n",
9958 dwo_file = *dwo_file_slot;
9960 do_cleanups (cleanups);
9962 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
9963 dwo_unit->dwo_file = dwo_file;
9964 dwo_unit->signature = signature;
9965 dwo_unit->section = obstack_alloc (&objfile->objfile_obstack,
9966 sizeof (struct dwarf2_section_info));
9967 *dwo_unit->section = sections.info_or_types;
9968 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
9973 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
9974 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
9975 piece within that section used by a TU/CU, return a virtual section
9976 of just that piece. */
9978 static struct dwarf2_section_info
9979 create_dwp_v2_section (struct dwarf2_section_info *section,
9980 bfd_size_type offset, bfd_size_type size)
9982 struct dwarf2_section_info result;
9985 gdb_assert (section != NULL);
9986 gdb_assert (!section->is_virtual);
9988 memset (&result, 0, sizeof (result));
9989 result.s.containing_section = section;
9990 result.is_virtual = 1;
9995 sectp = get_section_bfd_section (section);
9997 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
9998 bounds of the real section. This is a pretty-rare event, so just
9999 flag an error (easier) instead of a warning and trying to cope. */
10001 || offset + size > bfd_get_section_size (sectp))
10003 bfd *abfd = sectp->owner;
10005 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10006 " in section %s [in module %s]"),
10007 sectp ? bfd_section_name (abfd, sectp) : "<unknown>",
10008 objfile_name (dwarf2_per_objfile->objfile));
10011 result.virtual_offset = offset;
10012 result.size = size;
10016 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10017 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10018 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10019 This is for DWP version 2 files. */
10021 static struct dwo_unit *
10022 create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file,
10023 uint32_t unit_index,
10024 const char *comp_dir,
10025 ULONGEST signature, int is_debug_types)
10027 struct objfile *objfile = dwarf2_per_objfile->objfile;
10028 const struct dwp_hash_table *dwp_htab =
10029 is_debug_types ? dwp_file->tus : dwp_file->cus;
10030 bfd *dbfd = dwp_file->dbfd;
10031 const char *kind = is_debug_types ? "TU" : "CU";
10032 struct dwo_file *dwo_file;
10033 struct dwo_unit *dwo_unit;
10034 struct virtual_v2_dwo_sections sections;
10035 void **dwo_file_slot;
10036 char *virtual_dwo_name;
10037 struct dwarf2_section_info *cutu;
10038 struct cleanup *cleanups;
10041 gdb_assert (dwp_file->version == 2);
10043 if (dwarf2_read_debug)
10045 fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n",
10047 pulongest (unit_index), hex_string (signature),
10051 /* Fetch the section offsets of this DWO unit. */
10053 memset (§ions, 0, sizeof (sections));
10054 cleanups = make_cleanup (null_cleanup, 0);
10056 for (i = 0; i < dwp_htab->nr_columns; ++i)
10058 uint32_t offset = read_4_bytes (dbfd,
10059 dwp_htab->section_pool.v2.offsets
10060 + (((unit_index - 1) * dwp_htab->nr_columns
10062 * sizeof (uint32_t)));
10063 uint32_t size = read_4_bytes (dbfd,
10064 dwp_htab->section_pool.v2.sizes
10065 + (((unit_index - 1) * dwp_htab->nr_columns
10067 * sizeof (uint32_t)));
10069 switch (dwp_htab->section_pool.v2.section_ids[i])
10072 case DW_SECT_TYPES:
10073 sections.info_or_types_offset = offset;
10074 sections.info_or_types_size = size;
10076 case DW_SECT_ABBREV:
10077 sections.abbrev_offset = offset;
10078 sections.abbrev_size = size;
10081 sections.line_offset = offset;
10082 sections.line_size = size;
10085 sections.loc_offset = offset;
10086 sections.loc_size = size;
10088 case DW_SECT_STR_OFFSETS:
10089 sections.str_offsets_offset = offset;
10090 sections.str_offsets_size = size;
10092 case DW_SECT_MACINFO:
10093 sections.macinfo_offset = offset;
10094 sections.macinfo_size = size;
10096 case DW_SECT_MACRO:
10097 sections.macro_offset = offset;
10098 sections.macro_size = size;
10103 /* It's easier for the rest of the code if we fake a struct dwo_file and
10104 have dwo_unit "live" in that. At least for now.
10106 The DWP file can be made up of a random collection of CUs and TUs.
10107 However, for each CU + set of TUs that came from the same original DWO
10108 file, we can combine them back into a virtual DWO file to save space
10109 (fewer struct dwo_file objects to allocate). Remember that for really
10110 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10113 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10114 (long) (sections.abbrev_size ? sections.abbrev_offset : 0),
10115 (long) (sections.line_size ? sections.line_offset : 0),
10116 (long) (sections.loc_size ? sections.loc_offset : 0),
10117 (long) (sections.str_offsets_size
10118 ? sections.str_offsets_offset : 0));
10119 make_cleanup (xfree, virtual_dwo_name);
10120 /* Can we use an existing virtual DWO file? */
10121 dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir);
10122 /* Create one if necessary. */
10123 if (*dwo_file_slot == NULL)
10125 if (dwarf2_read_debug)
10127 fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n",
10130 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
10131 dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack,
10133 strlen (virtual_dwo_name));
10134 dwo_file->comp_dir = comp_dir;
10135 dwo_file->sections.abbrev =
10136 create_dwp_v2_section (&dwp_file->sections.abbrev,
10137 sections.abbrev_offset, sections.abbrev_size);
10138 dwo_file->sections.line =
10139 create_dwp_v2_section (&dwp_file->sections.line,
10140 sections.line_offset, sections.line_size);
10141 dwo_file->sections.loc =
10142 create_dwp_v2_section (&dwp_file->sections.loc,
10143 sections.loc_offset, sections.loc_size);
10144 dwo_file->sections.macinfo =
10145 create_dwp_v2_section (&dwp_file->sections.macinfo,
10146 sections.macinfo_offset, sections.macinfo_size);
10147 dwo_file->sections.macro =
10148 create_dwp_v2_section (&dwp_file->sections.macro,
10149 sections.macro_offset, sections.macro_size);
10150 dwo_file->sections.str_offsets =
10151 create_dwp_v2_section (&dwp_file->sections.str_offsets,
10152 sections.str_offsets_offset,
10153 sections.str_offsets_size);
10154 /* The "str" section is global to the entire DWP file. */
10155 dwo_file->sections.str = dwp_file->sections.str;
10156 /* The info or types section is assigned below to dwo_unit,
10157 there's no need to record it in dwo_file.
10158 Also, we can't simply record type sections in dwo_file because
10159 we record a pointer into the vector in dwo_unit. As we collect more
10160 types we'll grow the vector and eventually have to reallocate space
10161 for it, invalidating all copies of pointers into the previous
10163 *dwo_file_slot = dwo_file;
10167 if (dwarf2_read_debug)
10169 fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n",
10172 dwo_file = *dwo_file_slot;
10174 do_cleanups (cleanups);
10176 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
10177 dwo_unit->dwo_file = dwo_file;
10178 dwo_unit->signature = signature;
10179 dwo_unit->section = obstack_alloc (&objfile->objfile_obstack,
10180 sizeof (struct dwarf2_section_info));
10181 *dwo_unit->section = create_dwp_v2_section (is_debug_types
10182 ? &dwp_file->sections.types
10183 : &dwp_file->sections.info,
10184 sections.info_or_types_offset,
10185 sections.info_or_types_size);
10186 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10191 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10192 Returns NULL if the signature isn't found. */
10194 static struct dwo_unit *
10195 lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir,
10196 ULONGEST signature, int is_debug_types)
10198 const struct dwp_hash_table *dwp_htab =
10199 is_debug_types ? dwp_file->tus : dwp_file->cus;
10200 bfd *dbfd = dwp_file->dbfd;
10201 uint32_t mask = dwp_htab->nr_slots - 1;
10202 uint32_t hash = signature & mask;
10203 uint32_t hash2 = ((signature >> 32) & mask) | 1;
10206 struct dwo_unit find_dwo_cu, *dwo_cu;
10208 memset (&find_dwo_cu, 0, sizeof (find_dwo_cu));
10209 find_dwo_cu.signature = signature;
10210 slot = htab_find_slot (is_debug_types
10211 ? dwp_file->loaded_tus
10212 : dwp_file->loaded_cus,
10213 &find_dwo_cu, INSERT);
10218 /* Use a for loop so that we don't loop forever on bad debug info. */
10219 for (i = 0; i < dwp_htab->nr_slots; ++i)
10221 ULONGEST signature_in_table;
10223 signature_in_table =
10224 read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t));
10225 if (signature_in_table == signature)
10227 uint32_t unit_index =
10228 read_4_bytes (dbfd,
10229 dwp_htab->unit_table + hash * sizeof (uint32_t));
10231 if (dwp_file->version == 1)
10233 *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index,
10234 comp_dir, signature,
10239 *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index,
10240 comp_dir, signature,
10245 if (signature_in_table == 0)
10247 hash = (hash + hash2) & mask;
10250 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10251 " [in module %s]"),
10255 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10256 Open the file specified by FILE_NAME and hand it off to BFD for
10257 preliminary analysis. Return a newly initialized bfd *, which
10258 includes a canonicalized copy of FILE_NAME.
10259 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10260 SEARCH_CWD is true if the current directory is to be searched.
10261 It will be searched before debug-file-directory.
10262 If successful, the file is added to the bfd include table of the
10263 objfile's bfd (see gdb_bfd_record_inclusion).
10264 If unable to find/open the file, return NULL.
10265 NOTE: This function is derived from symfile_bfd_open. */
10268 try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd)
10272 char *absolute_name;
10273 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10274 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10275 to debug_file_directory. */
10277 static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' };
10281 if (*debug_file_directory != '\0')
10282 search_path = concat (".", dirname_separator_string,
10283 debug_file_directory, NULL);
10285 search_path = xstrdup (".");
10288 search_path = xstrdup (debug_file_directory);
10290 flags = OPF_RETURN_REALPATH;
10292 flags |= OPF_SEARCH_IN_PATH;
10293 desc = openp (search_path, flags, file_name,
10294 O_RDONLY | O_BINARY, &absolute_name);
10295 xfree (search_path);
10299 sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc);
10300 xfree (absolute_name);
10301 if (sym_bfd == NULL)
10303 bfd_set_cacheable (sym_bfd, 1);
10305 if (!bfd_check_format (sym_bfd, bfd_object))
10307 gdb_bfd_unref (sym_bfd); /* This also closes desc. */
10311 /* Success. Record the bfd as having been included by the objfile's bfd.
10312 This is important because things like demangled_names_hash lives in the
10313 objfile's per_bfd space and may have references to things like symbol
10314 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10315 gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd);
10320 /* Try to open DWO file FILE_NAME.
10321 COMP_DIR is the DW_AT_comp_dir attribute.
10322 The result is the bfd handle of the file.
10323 If there is a problem finding or opening the file, return NULL.
10324 Upon success, the canonicalized path of the file is stored in the bfd,
10325 same as symfile_bfd_open. */
10328 open_dwo_file (const char *file_name, const char *comp_dir)
10332 if (IS_ABSOLUTE_PATH (file_name))
10333 return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/);
10335 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10337 if (comp_dir != NULL)
10339 char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL);
10341 /* NOTE: If comp_dir is a relative path, this will also try the
10342 search path, which seems useful. */
10343 abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/);
10344 xfree (path_to_try);
10349 /* That didn't work, try debug-file-directory, which, despite its name,
10350 is a list of paths. */
10352 if (*debug_file_directory == '\0')
10355 return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/);
10358 /* This function is mapped across the sections and remembers the offset and
10359 size of each of the DWO debugging sections we are interested in. */
10362 dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr)
10364 struct dwo_sections *dwo_sections = dwo_sections_ptr;
10365 const struct dwop_section_names *names = &dwop_section_names;
10367 if (section_is_p (sectp->name, &names->abbrev_dwo))
10369 dwo_sections->abbrev.s.asection = sectp;
10370 dwo_sections->abbrev.size = bfd_get_section_size (sectp);
10372 else if (section_is_p (sectp->name, &names->info_dwo))
10374 dwo_sections->info.s.asection = sectp;
10375 dwo_sections->info.size = bfd_get_section_size (sectp);
10377 else if (section_is_p (sectp->name, &names->line_dwo))
10379 dwo_sections->line.s.asection = sectp;
10380 dwo_sections->line.size = bfd_get_section_size (sectp);
10382 else if (section_is_p (sectp->name, &names->loc_dwo))
10384 dwo_sections->loc.s.asection = sectp;
10385 dwo_sections->loc.size = bfd_get_section_size (sectp);
10387 else if (section_is_p (sectp->name, &names->macinfo_dwo))
10389 dwo_sections->macinfo.s.asection = sectp;
10390 dwo_sections->macinfo.size = bfd_get_section_size (sectp);
10392 else if (section_is_p (sectp->name, &names->macro_dwo))
10394 dwo_sections->macro.s.asection = sectp;
10395 dwo_sections->macro.size = bfd_get_section_size (sectp);
10397 else if (section_is_p (sectp->name, &names->str_dwo))
10399 dwo_sections->str.s.asection = sectp;
10400 dwo_sections->str.size = bfd_get_section_size (sectp);
10402 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
10404 dwo_sections->str_offsets.s.asection = sectp;
10405 dwo_sections->str_offsets.size = bfd_get_section_size (sectp);
10407 else if (section_is_p (sectp->name, &names->types_dwo))
10409 struct dwarf2_section_info type_section;
10411 memset (&type_section, 0, sizeof (type_section));
10412 type_section.s.asection = sectp;
10413 type_section.size = bfd_get_section_size (sectp);
10414 VEC_safe_push (dwarf2_section_info_def, dwo_sections->types,
10419 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10420 by PER_CU. This is for the non-DWP case.
10421 The result is NULL if DWO_NAME can't be found. */
10423 static struct dwo_file *
10424 open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu,
10425 const char *dwo_name, const char *comp_dir)
10427 struct objfile *objfile = dwarf2_per_objfile->objfile;
10428 struct dwo_file *dwo_file;
10430 struct cleanup *cleanups;
10432 dbfd = open_dwo_file (dwo_name, comp_dir);
10435 if (dwarf2_read_debug)
10436 fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name);
10439 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
10440 dwo_file->dwo_name = dwo_name;
10441 dwo_file->comp_dir = comp_dir;
10442 dwo_file->dbfd = dbfd;
10444 cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file);
10446 bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections);
10448 dwo_file->cu = create_dwo_cu (dwo_file);
10450 dwo_file->tus = create_debug_types_hash_table (dwo_file,
10451 dwo_file->sections.types);
10453 discard_cleanups (cleanups);
10455 if (dwarf2_read_debug)
10456 fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name);
10461 /* This function is mapped across the sections and remembers the offset and
10462 size of each of the DWP debugging sections common to version 1 and 2 that
10463 we are interested in. */
10466 dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp,
10467 void *dwp_file_ptr)
10469 struct dwp_file *dwp_file = dwp_file_ptr;
10470 const struct dwop_section_names *names = &dwop_section_names;
10471 unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
10473 /* Record the ELF section number for later lookup: this is what the
10474 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10475 gdb_assert (elf_section_nr < dwp_file->num_sections);
10476 dwp_file->elf_sections[elf_section_nr] = sectp;
10478 /* Look for specific sections that we need. */
10479 if (section_is_p (sectp->name, &names->str_dwo))
10481 dwp_file->sections.str.s.asection = sectp;
10482 dwp_file->sections.str.size = bfd_get_section_size (sectp);
10484 else if (section_is_p (sectp->name, &names->cu_index))
10486 dwp_file->sections.cu_index.s.asection = sectp;
10487 dwp_file->sections.cu_index.size = bfd_get_section_size (sectp);
10489 else if (section_is_p (sectp->name, &names->tu_index))
10491 dwp_file->sections.tu_index.s.asection = sectp;
10492 dwp_file->sections.tu_index.size = bfd_get_section_size (sectp);
10496 /* This function is mapped across the sections and remembers the offset and
10497 size of each of the DWP version 2 debugging sections that we are interested
10498 in. This is split into a separate function because we don't know if we
10499 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10502 dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr)
10504 struct dwp_file *dwp_file = dwp_file_ptr;
10505 const struct dwop_section_names *names = &dwop_section_names;
10506 unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
10508 /* Record the ELF section number for later lookup: this is what the
10509 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10510 gdb_assert (elf_section_nr < dwp_file->num_sections);
10511 dwp_file->elf_sections[elf_section_nr] = sectp;
10513 /* Look for specific sections that we need. */
10514 if (section_is_p (sectp->name, &names->abbrev_dwo))
10516 dwp_file->sections.abbrev.s.asection = sectp;
10517 dwp_file->sections.abbrev.size = bfd_get_section_size (sectp);
10519 else if (section_is_p (sectp->name, &names->info_dwo))
10521 dwp_file->sections.info.s.asection = sectp;
10522 dwp_file->sections.info.size = bfd_get_section_size (sectp);
10524 else if (section_is_p (sectp->name, &names->line_dwo))
10526 dwp_file->sections.line.s.asection = sectp;
10527 dwp_file->sections.line.size = bfd_get_section_size (sectp);
10529 else if (section_is_p (sectp->name, &names->loc_dwo))
10531 dwp_file->sections.loc.s.asection = sectp;
10532 dwp_file->sections.loc.size = bfd_get_section_size (sectp);
10534 else if (section_is_p (sectp->name, &names->macinfo_dwo))
10536 dwp_file->sections.macinfo.s.asection = sectp;
10537 dwp_file->sections.macinfo.size = bfd_get_section_size (sectp);
10539 else if (section_is_p (sectp->name, &names->macro_dwo))
10541 dwp_file->sections.macro.s.asection = sectp;
10542 dwp_file->sections.macro.size = bfd_get_section_size (sectp);
10544 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
10546 dwp_file->sections.str_offsets.s.asection = sectp;
10547 dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp);
10549 else if (section_is_p (sectp->name, &names->types_dwo))
10551 dwp_file->sections.types.s.asection = sectp;
10552 dwp_file->sections.types.size = bfd_get_section_size (sectp);
10556 /* Hash function for dwp_file loaded CUs/TUs. */
10559 hash_dwp_loaded_cutus (const void *item)
10561 const struct dwo_unit *dwo_unit = item;
10563 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10564 return dwo_unit->signature;
10567 /* Equality function for dwp_file loaded CUs/TUs. */
10570 eq_dwp_loaded_cutus (const void *a, const void *b)
10572 const struct dwo_unit *dua = a;
10573 const struct dwo_unit *dub = b;
10575 return dua->signature == dub->signature;
10578 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10581 allocate_dwp_loaded_cutus_table (struct objfile *objfile)
10583 return htab_create_alloc_ex (3,
10584 hash_dwp_loaded_cutus,
10585 eq_dwp_loaded_cutus,
10587 &objfile->objfile_obstack,
10588 hashtab_obstack_allocate,
10589 dummy_obstack_deallocate);
10592 /* Try to open DWP file FILE_NAME.
10593 The result is the bfd handle of the file.
10594 If there is a problem finding or opening the file, return NULL.
10595 Upon success, the canonicalized path of the file is stored in the bfd,
10596 same as symfile_bfd_open. */
10599 open_dwp_file (const char *file_name)
10603 abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/);
10607 /* Work around upstream bug 15652.
10608 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10609 [Whether that's a "bug" is debatable, but it is getting in our way.]
10610 We have no real idea where the dwp file is, because gdb's realpath-ing
10611 of the executable's path may have discarded the needed info.
10612 [IWBN if the dwp file name was recorded in the executable, akin to
10613 .gnu_debuglink, but that doesn't exist yet.]
10614 Strip the directory from FILE_NAME and search again. */
10615 if (*debug_file_directory != '\0')
10617 /* Don't implicitly search the current directory here.
10618 If the user wants to search "." to handle this case,
10619 it must be added to debug-file-directory. */
10620 return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/,
10627 /* Initialize the use of the DWP file for the current objfile.
10628 By convention the name of the DWP file is ${objfile}.dwp.
10629 The result is NULL if it can't be found. */
10631 static struct dwp_file *
10632 open_and_init_dwp_file (void)
10634 struct objfile *objfile = dwarf2_per_objfile->objfile;
10635 struct dwp_file *dwp_file;
10638 struct cleanup *cleanups;
10640 /* Try to find first .dwp for the binary file before any symbolic links
10642 dwp_name = xstrprintf ("%s.dwp", objfile->original_name);
10643 cleanups = make_cleanup (xfree, dwp_name);
10645 dbfd = open_dwp_file (dwp_name);
10647 && strcmp (objfile->original_name, objfile_name (objfile)) != 0)
10649 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10650 dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile));
10651 make_cleanup (xfree, dwp_name);
10652 dbfd = open_dwp_file (dwp_name);
10657 if (dwarf2_read_debug)
10658 fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name);
10659 do_cleanups (cleanups);
10662 dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file);
10663 dwp_file->name = bfd_get_filename (dbfd);
10664 dwp_file->dbfd = dbfd;
10665 do_cleanups (cleanups);
10667 /* +1: section 0 is unused */
10668 dwp_file->num_sections = bfd_count_sections (dbfd) + 1;
10669 dwp_file->elf_sections =
10670 OBSTACK_CALLOC (&objfile->objfile_obstack,
10671 dwp_file->num_sections, asection *);
10673 bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file);
10675 dwp_file->cus = create_dwp_hash_table (dwp_file, 0);
10677 dwp_file->tus = create_dwp_hash_table (dwp_file, 1);
10679 /* The DWP file version is stored in the hash table. Oh well. */
10680 if (dwp_file->cus->version != dwp_file->tus->version)
10682 /* Technically speaking, we should try to limp along, but this is
10683 pretty bizarre. We use pulongest here because that's the established
10684 portability solution (e.g, we cannot use %u for uint32_t). */
10685 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10686 " TU version %s [in DWP file %s]"),
10687 pulongest (dwp_file->cus->version),
10688 pulongest (dwp_file->tus->version), dwp_name);
10690 dwp_file->version = dwp_file->cus->version;
10692 if (dwp_file->version == 2)
10693 bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file);
10695 dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile);
10696 dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile);
10698 if (dwarf2_read_debug)
10700 fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name);
10701 fprintf_unfiltered (gdb_stdlog,
10702 " %s CUs, %s TUs\n",
10703 pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0),
10704 pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0));
10710 /* Wrapper around open_and_init_dwp_file, only open it once. */
10712 static struct dwp_file *
10713 get_dwp_file (void)
10715 if (! dwarf2_per_objfile->dwp_checked)
10717 dwarf2_per_objfile->dwp_file = open_and_init_dwp_file ();
10718 dwarf2_per_objfile->dwp_checked = 1;
10720 return dwarf2_per_objfile->dwp_file;
10723 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10724 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10725 or in the DWP file for the objfile, referenced by THIS_UNIT.
10726 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10727 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10729 This is called, for example, when wanting to read a variable with a
10730 complex location. Therefore we don't want to do file i/o for every call.
10731 Therefore we don't want to look for a DWO file on every call.
10732 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10733 then we check if we've already seen DWO_NAME, and only THEN do we check
10736 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10737 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10739 static struct dwo_unit *
10740 lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit,
10741 const char *dwo_name, const char *comp_dir,
10742 ULONGEST signature, int is_debug_types)
10744 struct objfile *objfile = dwarf2_per_objfile->objfile;
10745 const char *kind = is_debug_types ? "TU" : "CU";
10746 void **dwo_file_slot;
10747 struct dwo_file *dwo_file;
10748 struct dwp_file *dwp_file;
10750 /* First see if there's a DWP file.
10751 If we have a DWP file but didn't find the DWO inside it, don't
10752 look for the original DWO file. It makes gdb behave differently
10753 depending on whether one is debugging in the build tree. */
10755 dwp_file = get_dwp_file ();
10756 if (dwp_file != NULL)
10758 const struct dwp_hash_table *dwp_htab =
10759 is_debug_types ? dwp_file->tus : dwp_file->cus;
10761 if (dwp_htab != NULL)
10763 struct dwo_unit *dwo_cutu =
10764 lookup_dwo_unit_in_dwp (dwp_file, comp_dir,
10765 signature, is_debug_types);
10767 if (dwo_cutu != NULL)
10769 if (dwarf2_read_debug)
10771 fprintf_unfiltered (gdb_stdlog,
10772 "Virtual DWO %s %s found: @%s\n",
10773 kind, hex_string (signature),
10774 host_address_to_string (dwo_cutu));
10782 /* No DWP file, look for the DWO file. */
10784 dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir);
10785 if (*dwo_file_slot == NULL)
10787 /* Read in the file and build a table of the CUs/TUs it contains. */
10788 *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir);
10790 /* NOTE: This will be NULL if unable to open the file. */
10791 dwo_file = *dwo_file_slot;
10793 if (dwo_file != NULL)
10795 struct dwo_unit *dwo_cutu = NULL;
10797 if (is_debug_types && dwo_file->tus)
10799 struct dwo_unit find_dwo_cutu;
10801 memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu));
10802 find_dwo_cutu.signature = signature;
10803 dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu);
10805 else if (!is_debug_types && dwo_file->cu)
10807 if (signature == dwo_file->cu->signature)
10808 dwo_cutu = dwo_file->cu;
10811 if (dwo_cutu != NULL)
10813 if (dwarf2_read_debug)
10815 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n",
10816 kind, dwo_name, hex_string (signature),
10817 host_address_to_string (dwo_cutu));
10824 /* We didn't find it. This could mean a dwo_id mismatch, or
10825 someone deleted the DWO/DWP file, or the search path isn't set up
10826 correctly to find the file. */
10828 if (dwarf2_read_debug)
10830 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n",
10831 kind, dwo_name, hex_string (signature));
10834 /* This is a warning and not a complaint because it can be caused by
10835 pilot error (e.g., user accidentally deleting the DWO). */
10837 /* Print the name of the DWP file if we looked there, helps the user
10838 better diagnose the problem. */
10839 char *dwp_text = NULL;
10840 struct cleanup *cleanups;
10842 if (dwp_file != NULL)
10843 dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name));
10844 cleanups = make_cleanup (xfree, dwp_text);
10846 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
10847 " [in module %s]"),
10848 kind, dwo_name, hex_string (signature),
10849 dwp_text != NULL ? dwp_text : "",
10850 this_unit->is_debug_types ? "TU" : "CU",
10851 this_unit->offset.sect_off, objfile_name (objfile));
10853 do_cleanups (cleanups);
10858 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
10859 See lookup_dwo_cutu_unit for details. */
10861 static struct dwo_unit *
10862 lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu,
10863 const char *dwo_name, const char *comp_dir,
10864 ULONGEST signature)
10866 return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0);
10869 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
10870 See lookup_dwo_cutu_unit for details. */
10872 static struct dwo_unit *
10873 lookup_dwo_type_unit (struct signatured_type *this_tu,
10874 const char *dwo_name, const char *comp_dir)
10876 return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1);
10879 /* Traversal function for queue_and_load_all_dwo_tus. */
10882 queue_and_load_dwo_tu (void **slot, void *info)
10884 struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot;
10885 struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info;
10886 ULONGEST signature = dwo_unit->signature;
10887 struct signatured_type *sig_type =
10888 lookup_dwo_signatured_type (per_cu->cu, signature);
10890 if (sig_type != NULL)
10892 struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu;
10894 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
10895 a real dependency of PER_CU on SIG_TYPE. That is detected later
10896 while processing PER_CU. */
10897 if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language))
10898 load_full_type_unit (sig_cu);
10899 VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu);
10905 /* Queue all TUs contained in the DWO of PER_CU to be read in.
10906 The DWO may have the only definition of the type, though it may not be
10907 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
10908 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
10911 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu)
10913 struct dwo_unit *dwo_unit;
10914 struct dwo_file *dwo_file;
10916 gdb_assert (!per_cu->is_debug_types);
10917 gdb_assert (get_dwp_file () == NULL);
10918 gdb_assert (per_cu->cu != NULL);
10920 dwo_unit = per_cu->cu->dwo_unit;
10921 gdb_assert (dwo_unit != NULL);
10923 dwo_file = dwo_unit->dwo_file;
10924 if (dwo_file->tus != NULL)
10925 htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu);
10928 /* Free all resources associated with DWO_FILE.
10929 Close the DWO file and munmap the sections.
10930 All memory should be on the objfile obstack. */
10933 free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile)
10936 struct dwarf2_section_info *section;
10938 /* Note: dbfd is NULL for virtual DWO files. */
10939 gdb_bfd_unref (dwo_file->dbfd);
10941 VEC_free (dwarf2_section_info_def, dwo_file->sections.types);
10944 /* Wrapper for free_dwo_file for use in cleanups. */
10947 free_dwo_file_cleanup (void *arg)
10949 struct dwo_file *dwo_file = (struct dwo_file *) arg;
10950 struct objfile *objfile = dwarf2_per_objfile->objfile;
10952 free_dwo_file (dwo_file, objfile);
10955 /* Traversal function for free_dwo_files. */
10958 free_dwo_file_from_slot (void **slot, void *info)
10960 struct dwo_file *dwo_file = (struct dwo_file *) *slot;
10961 struct objfile *objfile = (struct objfile *) info;
10963 free_dwo_file (dwo_file, objfile);
10968 /* Free all resources associated with DWO_FILES. */
10971 free_dwo_files (htab_t dwo_files, struct objfile *objfile)
10973 htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile);
10976 /* Read in various DIEs. */
10978 /* qsort helper for inherit_abstract_dies. */
10981 unsigned_int_compar (const void *ap, const void *bp)
10983 unsigned int a = *(unsigned int *) ap;
10984 unsigned int b = *(unsigned int *) bp;
10986 return (a > b) - (b > a);
10989 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
10990 Inherit only the children of the DW_AT_abstract_origin DIE not being
10991 already referenced by DW_AT_abstract_origin from the children of the
10995 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
10997 struct die_info *child_die;
10998 unsigned die_children_count;
10999 /* CU offsets which were referenced by children of the current DIE. */
11000 sect_offset *offsets;
11001 sect_offset *offsets_end, *offsetp;
11002 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11003 struct die_info *origin_die;
11004 /* Iterator of the ORIGIN_DIE children. */
11005 struct die_info *origin_child_die;
11006 struct cleanup *cleanups;
11007 struct attribute *attr;
11008 struct dwarf2_cu *origin_cu;
11009 struct pending **origin_previous_list_in_scope;
11011 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
11015 /* Note that following die references may follow to a die in a
11019 origin_die = follow_die_ref (die, attr, &origin_cu);
11021 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11023 origin_previous_list_in_scope = origin_cu->list_in_scope;
11024 origin_cu->list_in_scope = cu->list_in_scope;
11026 if (die->tag != origin_die->tag
11027 && !(die->tag == DW_TAG_inlined_subroutine
11028 && origin_die->tag == DW_TAG_subprogram))
11029 complaint (&symfile_complaints,
11030 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11031 die->offset.sect_off, origin_die->offset.sect_off);
11033 child_die = die->child;
11034 die_children_count = 0;
11035 while (child_die && child_die->tag)
11037 child_die = sibling_die (child_die);
11038 die_children_count++;
11040 offsets = xmalloc (sizeof (*offsets) * die_children_count);
11041 cleanups = make_cleanup (xfree, offsets);
11043 offsets_end = offsets;
11044 child_die = die->child;
11045 while (child_die && child_die->tag)
11047 /* For each CHILD_DIE, find the corresponding child of
11048 ORIGIN_DIE. If there is more than one layer of
11049 DW_AT_abstract_origin, follow them all; there shouldn't be,
11050 but GCC versions at least through 4.4 generate this (GCC PR
11052 struct die_info *child_origin_die = child_die;
11053 struct dwarf2_cu *child_origin_cu = cu;
11057 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
11061 child_origin_die = follow_die_ref (child_origin_die, attr,
11065 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11066 counterpart may exist. */
11067 if (child_origin_die != child_die)
11069 if (child_die->tag != child_origin_die->tag
11070 && !(child_die->tag == DW_TAG_inlined_subroutine
11071 && child_origin_die->tag == DW_TAG_subprogram))
11072 complaint (&symfile_complaints,
11073 _("Child DIE 0x%x and its abstract origin 0x%x have "
11074 "different tags"), child_die->offset.sect_off,
11075 child_origin_die->offset.sect_off);
11076 if (child_origin_die->parent != origin_die)
11077 complaint (&symfile_complaints,
11078 _("Child DIE 0x%x and its abstract origin 0x%x have "
11079 "different parents"), child_die->offset.sect_off,
11080 child_origin_die->offset.sect_off);
11082 *offsets_end++ = child_origin_die->offset;
11084 child_die = sibling_die (child_die);
11086 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
11087 unsigned_int_compar);
11088 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
11089 if (offsetp[-1].sect_off == offsetp->sect_off)
11090 complaint (&symfile_complaints,
11091 _("Multiple children of DIE 0x%x refer "
11092 "to DIE 0x%x as their abstract origin"),
11093 die->offset.sect_off, offsetp->sect_off);
11096 origin_child_die = origin_die->child;
11097 while (origin_child_die && origin_child_die->tag)
11099 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11100 while (offsetp < offsets_end
11101 && offsetp->sect_off < origin_child_die->offset.sect_off)
11103 if (offsetp >= offsets_end
11104 || offsetp->sect_off > origin_child_die->offset.sect_off)
11106 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11107 Check whether we're already processing ORIGIN_CHILD_DIE.
11108 This can happen with mutually referenced abstract_origins.
11110 if (!origin_child_die->in_process)
11111 process_die (origin_child_die, origin_cu);
11113 origin_child_die = sibling_die (origin_child_die);
11115 origin_cu->list_in_scope = origin_previous_list_in_scope;
11117 do_cleanups (cleanups);
11121 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
11123 struct objfile *objfile = cu->objfile;
11124 struct context_stack *new;
11127 struct die_info *child_die;
11128 struct attribute *attr, *call_line, *call_file;
11130 CORE_ADDR baseaddr;
11131 struct block *block;
11132 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
11133 VEC (symbolp) *template_args = NULL;
11134 struct template_symbol *templ_func = NULL;
11138 /* If we do not have call site information, we can't show the
11139 caller of this inlined function. That's too confusing, so
11140 only use the scope for local variables. */
11141 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
11142 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
11143 if (call_line == NULL || call_file == NULL)
11145 read_lexical_block_scope (die, cu);
11150 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11152 name = dwarf2_name (die, cu);
11154 /* Ignore functions with missing or empty names. These are actually
11155 illegal according to the DWARF standard. */
11158 complaint (&symfile_complaints,
11159 _("missing name for subprogram DIE at %d"),
11160 die->offset.sect_off);
11164 /* Ignore functions with missing or invalid low and high pc attributes. */
11165 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
11167 attr = dwarf2_attr (die, DW_AT_external, cu);
11168 if (!attr || !DW_UNSND (attr))
11169 complaint (&symfile_complaints,
11170 _("cannot get low and high bounds "
11171 "for subprogram DIE at %d"),
11172 die->offset.sect_off);
11177 highpc += baseaddr;
11179 /* If we have any template arguments, then we must allocate a
11180 different sort of symbol. */
11181 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
11183 if (child_die->tag == DW_TAG_template_type_param
11184 || child_die->tag == DW_TAG_template_value_param)
11186 templ_func = allocate_template_symbol (objfile);
11187 templ_func->base.is_cplus_template_function = 1;
11192 new = push_context (0, lowpc);
11193 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
11194 (struct symbol *) templ_func);
11196 /* If there is a location expression for DW_AT_frame_base, record
11198 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
11200 dwarf2_symbol_mark_computed (attr, new->name, cu, 1);
11202 cu->list_in_scope = &local_symbols;
11204 if (die->child != NULL)
11206 child_die = die->child;
11207 while (child_die && child_die->tag)
11209 if (child_die->tag == DW_TAG_template_type_param
11210 || child_die->tag == DW_TAG_template_value_param)
11212 struct symbol *arg = new_symbol (child_die, NULL, cu);
11215 VEC_safe_push (symbolp, template_args, arg);
11218 process_die (child_die, cu);
11219 child_die = sibling_die (child_die);
11223 inherit_abstract_dies (die, cu);
11225 /* If we have a DW_AT_specification, we might need to import using
11226 directives from the context of the specification DIE. See the
11227 comment in determine_prefix. */
11228 if (cu->language == language_cplus
11229 && dwarf2_attr (die, DW_AT_specification, cu))
11231 struct dwarf2_cu *spec_cu = cu;
11232 struct die_info *spec_die = die_specification (die, &spec_cu);
11236 child_die = spec_die->child;
11237 while (child_die && child_die->tag)
11239 if (child_die->tag == DW_TAG_imported_module)
11240 process_die (child_die, spec_cu);
11241 child_die = sibling_die (child_die);
11244 /* In some cases, GCC generates specification DIEs that
11245 themselves contain DW_AT_specification attributes. */
11246 spec_die = die_specification (spec_die, &spec_cu);
11250 new = pop_context ();
11251 /* Make a block for the local symbols within. */
11252 block = finish_block (new->name, &local_symbols, new->old_blocks,
11253 lowpc, highpc, objfile);
11255 /* For C++, set the block's scope. */
11256 if ((cu->language == language_cplus || cu->language == language_fortran)
11257 && cu->processing_has_namespace_info)
11258 block_set_scope (block, determine_prefix (die, cu),
11259 &objfile->objfile_obstack);
11261 /* If we have address ranges, record them. */
11262 dwarf2_record_block_ranges (die, block, baseaddr, cu);
11264 /* Attach template arguments to function. */
11265 if (! VEC_empty (symbolp, template_args))
11267 gdb_assert (templ_func != NULL);
11269 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
11270 templ_func->template_arguments
11271 = obstack_alloc (&objfile->objfile_obstack,
11272 (templ_func->n_template_arguments
11273 * sizeof (struct symbol *)));
11274 memcpy (templ_func->template_arguments,
11275 VEC_address (symbolp, template_args),
11276 (templ_func->n_template_arguments * sizeof (struct symbol *)));
11277 VEC_free (symbolp, template_args);
11280 /* In C++, we can have functions nested inside functions (e.g., when
11281 a function declares a class that has methods). This means that
11282 when we finish processing a function scope, we may need to go
11283 back to building a containing block's symbol lists. */
11284 local_symbols = new->locals;
11285 using_directives = new->using_directives;
11287 /* If we've finished processing a top-level function, subsequent
11288 symbols go in the file symbol list. */
11289 if (outermost_context_p ())
11290 cu->list_in_scope = &file_symbols;
11293 /* Process all the DIES contained within a lexical block scope. Start
11294 a new scope, process the dies, and then close the scope. */
11297 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
11299 struct objfile *objfile = cu->objfile;
11300 struct context_stack *new;
11301 CORE_ADDR lowpc, highpc;
11302 struct die_info *child_die;
11303 CORE_ADDR baseaddr;
11305 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11307 /* Ignore blocks with missing or invalid low and high pc attributes. */
11308 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11309 as multiple lexical blocks? Handling children in a sane way would
11310 be nasty. Might be easier to properly extend generic blocks to
11311 describe ranges. */
11312 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
11315 highpc += baseaddr;
11317 push_context (0, lowpc);
11318 if (die->child != NULL)
11320 child_die = die->child;
11321 while (child_die && child_die->tag)
11323 process_die (child_die, cu);
11324 child_die = sibling_die (child_die);
11327 new = pop_context ();
11329 if (local_symbols != NULL || using_directives != NULL)
11331 struct block *block
11332 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
11335 /* Note that recording ranges after traversing children, as we
11336 do here, means that recording a parent's ranges entails
11337 walking across all its children's ranges as they appear in
11338 the address map, which is quadratic behavior.
11340 It would be nicer to record the parent's ranges before
11341 traversing its children, simply overriding whatever you find
11342 there. But since we don't even decide whether to create a
11343 block until after we've traversed its children, that's hard
11345 dwarf2_record_block_ranges (die, block, baseaddr, cu);
11347 local_symbols = new->locals;
11348 using_directives = new->using_directives;
11351 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11354 read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu)
11356 struct objfile *objfile = cu->objfile;
11357 struct gdbarch *gdbarch = get_objfile_arch (objfile);
11358 CORE_ADDR pc, baseaddr;
11359 struct attribute *attr;
11360 struct call_site *call_site, call_site_local;
11363 struct die_info *child_die;
11365 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11367 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
11370 complaint (&symfile_complaints,
11371 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11372 "DIE 0x%x [in module %s]"),
11373 die->offset.sect_off, objfile_name (objfile));
11376 pc = attr_value_as_address (attr) + baseaddr;
11378 if (cu->call_site_htab == NULL)
11379 cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq,
11380 NULL, &objfile->objfile_obstack,
11381 hashtab_obstack_allocate, NULL);
11382 call_site_local.pc = pc;
11383 slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT);
11386 complaint (&symfile_complaints,
11387 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11388 "DIE 0x%x [in module %s]"),
11389 paddress (gdbarch, pc), die->offset.sect_off,
11390 objfile_name (objfile));
11394 /* Count parameters at the caller. */
11397 for (child_die = die->child; child_die && child_die->tag;
11398 child_die = sibling_die (child_die))
11400 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
11402 complaint (&symfile_complaints,
11403 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11404 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11405 child_die->tag, child_die->offset.sect_off,
11406 objfile_name (objfile));
11413 call_site = obstack_alloc (&objfile->objfile_obstack,
11414 (sizeof (*call_site)
11415 + (sizeof (*call_site->parameter)
11416 * (nparams - 1))));
11418 memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter));
11419 call_site->pc = pc;
11421 if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu))
11423 struct die_info *func_die;
11425 /* Skip also over DW_TAG_inlined_subroutine. */
11426 for (func_die = die->parent;
11427 func_die && func_die->tag != DW_TAG_subprogram
11428 && func_die->tag != DW_TAG_subroutine_type;
11429 func_die = func_die->parent);
11431 /* DW_AT_GNU_all_call_sites is a superset
11432 of DW_AT_GNU_all_tail_call_sites. */
11434 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu)
11435 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu))
11437 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11438 not complete. But keep CALL_SITE for look ups via call_site_htab,
11439 both the initial caller containing the real return address PC and
11440 the final callee containing the current PC of a chain of tail
11441 calls do not need to have the tail call list complete. But any
11442 function candidate for a virtual tail call frame searched via
11443 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11444 determined unambiguously. */
11448 struct type *func_type = NULL;
11451 func_type = get_die_type (func_die, cu);
11452 if (func_type != NULL)
11454 gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC);
11456 /* Enlist this call site to the function. */
11457 call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type);
11458 TYPE_TAIL_CALL_LIST (func_type) = call_site;
11461 complaint (&symfile_complaints,
11462 _("Cannot find function owning DW_TAG_GNU_call_site "
11463 "DIE 0x%x [in module %s]"),
11464 die->offset.sect_off, objfile_name (objfile));
11468 attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu);
11470 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
11471 SET_FIELD_DWARF_BLOCK (call_site->target, NULL);
11472 if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0))
11473 /* Keep NULL DWARF_BLOCK. */;
11474 else if (attr_form_is_block (attr))
11476 struct dwarf2_locexpr_baton *dlbaton;
11478 dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton));
11479 dlbaton->data = DW_BLOCK (attr)->data;
11480 dlbaton->size = DW_BLOCK (attr)->size;
11481 dlbaton->per_cu = cu->per_cu;
11483 SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton);
11485 else if (attr_form_is_ref (attr))
11487 struct dwarf2_cu *target_cu = cu;
11488 struct die_info *target_die;
11490 target_die = follow_die_ref (die, attr, &target_cu);
11491 gdb_assert (target_cu->objfile == objfile);
11492 if (die_is_declaration (target_die, target_cu))
11494 const char *target_physname = NULL;
11495 struct attribute *target_attr;
11497 /* Prefer the mangled name; otherwise compute the demangled one. */
11498 target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu);
11499 if (target_attr == NULL)
11500 target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name,
11502 if (target_attr != NULL && DW_STRING (target_attr) != NULL)
11503 target_physname = DW_STRING (target_attr);
11505 target_physname = dwarf2_physname (NULL, target_die, target_cu);
11506 if (target_physname == NULL)
11507 complaint (&symfile_complaints,
11508 _("DW_AT_GNU_call_site_target target DIE has invalid "
11509 "physname, for referencing DIE 0x%x [in module %s]"),
11510 die->offset.sect_off, objfile_name (objfile));
11512 SET_FIELD_PHYSNAME (call_site->target, target_physname);
11518 /* DW_AT_entry_pc should be preferred. */
11519 if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL))
11520 complaint (&symfile_complaints,
11521 _("DW_AT_GNU_call_site_target target DIE has invalid "
11522 "low pc, for referencing DIE 0x%x [in module %s]"),
11523 die->offset.sect_off, objfile_name (objfile));
11525 SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr);
11529 complaint (&symfile_complaints,
11530 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11531 "block nor reference, for DIE 0x%x [in module %s]"),
11532 die->offset.sect_off, objfile_name (objfile));
11534 call_site->per_cu = cu->per_cu;
11536 for (child_die = die->child;
11537 child_die && child_die->tag;
11538 child_die = sibling_die (child_die))
11540 struct call_site_parameter *parameter;
11541 struct attribute *loc, *origin;
11543 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
11545 /* Already printed the complaint above. */
11549 gdb_assert (call_site->parameter_count < nparams);
11550 parameter = &call_site->parameter[call_site->parameter_count];
11552 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11553 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11554 register is contained in DW_AT_GNU_call_site_value. */
11556 loc = dwarf2_attr (child_die, DW_AT_location, cu);
11557 origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
11558 if (loc == NULL && origin != NULL && attr_form_is_ref (origin))
11560 sect_offset offset;
11562 parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET;
11563 offset = dwarf2_get_ref_die_offset (origin);
11564 if (!offset_in_cu_p (&cu->header, offset))
11566 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11567 binding can be done only inside one CU. Such referenced DIE
11568 therefore cannot be even moved to DW_TAG_partial_unit. */
11569 complaint (&symfile_complaints,
11570 _("DW_AT_abstract_origin offset is not in CU for "
11571 "DW_TAG_GNU_call_site child DIE 0x%x "
11573 child_die->offset.sect_off, objfile_name (objfile));
11576 parameter->u.param_offset.cu_off = (offset.sect_off
11577 - cu->header.offset.sect_off);
11579 else if (loc == NULL || origin != NULL || !attr_form_is_block (loc))
11581 complaint (&symfile_complaints,
11582 _("No DW_FORM_block* DW_AT_location for "
11583 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11584 child_die->offset.sect_off, objfile_name (objfile));
11589 parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg
11590 (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]);
11591 if (parameter->u.dwarf_reg != -1)
11592 parameter->kind = CALL_SITE_PARAMETER_DWARF_REG;
11593 else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data,
11594 &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size],
11595 ¶meter->u.fb_offset))
11596 parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET;
11599 complaint (&symfile_complaints,
11600 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11601 "for DW_FORM_block* DW_AT_location is supported for "
11602 "DW_TAG_GNU_call_site child DIE 0x%x "
11604 child_die->offset.sect_off, objfile_name (objfile));
11609 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu);
11610 if (!attr_form_is_block (attr))
11612 complaint (&symfile_complaints,
11613 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11614 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11615 child_die->offset.sect_off, objfile_name (objfile));
11618 parameter->value = DW_BLOCK (attr)->data;
11619 parameter->value_size = DW_BLOCK (attr)->size;
11621 /* Parameters are not pre-cleared by memset above. */
11622 parameter->data_value = NULL;
11623 parameter->data_value_size = 0;
11624 call_site->parameter_count++;
11626 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu);
11629 if (!attr_form_is_block (attr))
11630 complaint (&symfile_complaints,
11631 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11632 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11633 child_die->offset.sect_off, objfile_name (objfile));
11636 parameter->data_value = DW_BLOCK (attr)->data;
11637 parameter->data_value_size = DW_BLOCK (attr)->size;
11643 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11644 Return 1 if the attributes are present and valid, otherwise, return 0.
11645 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11648 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
11649 CORE_ADDR *high_return, struct dwarf2_cu *cu,
11650 struct partial_symtab *ranges_pst)
11652 struct objfile *objfile = cu->objfile;
11653 struct comp_unit_head *cu_header = &cu->header;
11654 bfd *obfd = objfile->obfd;
11655 unsigned int addr_size = cu_header->addr_size;
11656 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
11657 /* Base address selection entry. */
11660 unsigned int dummy;
11661 const gdb_byte *buffer;
11665 CORE_ADDR high = 0;
11666 CORE_ADDR baseaddr;
11668 found_base = cu->base_known;
11669 base = cu->base_address;
11671 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
11672 if (offset >= dwarf2_per_objfile->ranges.size)
11674 complaint (&symfile_complaints,
11675 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11679 buffer = dwarf2_per_objfile->ranges.buffer + offset;
11681 /* Read in the largest possible address. */
11682 marker = read_address (obfd, buffer, cu, &dummy);
11683 if ((marker & mask) == mask)
11685 /* If we found the largest possible address, then
11686 read the base address. */
11687 base = read_address (obfd, buffer + addr_size, cu, &dummy);
11688 buffer += 2 * addr_size;
11689 offset += 2 * addr_size;
11695 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11699 CORE_ADDR range_beginning, range_end;
11701 range_beginning = read_address (obfd, buffer, cu, &dummy);
11702 buffer += addr_size;
11703 range_end = read_address (obfd, buffer, cu, &dummy);
11704 buffer += addr_size;
11705 offset += 2 * addr_size;
11707 /* An end of list marker is a pair of zero addresses. */
11708 if (range_beginning == 0 && range_end == 0)
11709 /* Found the end of list entry. */
11712 /* Each base address selection entry is a pair of 2 values.
11713 The first is the largest possible address, the second is
11714 the base address. Check for a base address here. */
11715 if ((range_beginning & mask) == mask)
11717 /* If we found the largest possible address, then
11718 read the base address. */
11719 base = read_address (obfd, buffer + addr_size, cu, &dummy);
11726 /* We have no valid base address for the ranges
11728 complaint (&symfile_complaints,
11729 _("Invalid .debug_ranges data (no base address)"));
11733 if (range_beginning > range_end)
11735 /* Inverted range entries are invalid. */
11736 complaint (&symfile_complaints,
11737 _("Invalid .debug_ranges data (inverted range)"));
11741 /* Empty range entries have no effect. */
11742 if (range_beginning == range_end)
11745 range_beginning += base;
11748 /* A not-uncommon case of bad debug info.
11749 Don't pollute the addrmap with bad data. */
11750 if (range_beginning + baseaddr == 0
11751 && !dwarf2_per_objfile->has_section_at_zero)
11753 complaint (&symfile_complaints,
11754 _(".debug_ranges entry has start address of zero"
11755 " [in module %s]"), objfile_name (objfile));
11759 if (ranges_pst != NULL)
11760 addrmap_set_empty (objfile->psymtabs_addrmap,
11761 range_beginning + baseaddr,
11762 range_end - 1 + baseaddr,
11765 /* FIXME: This is recording everything as a low-high
11766 segment of consecutive addresses. We should have a
11767 data structure for discontiguous block ranges
11771 low = range_beginning;
11777 if (range_beginning < low)
11778 low = range_beginning;
11779 if (range_end > high)
11785 /* If the first entry is an end-of-list marker, the range
11786 describes an empty scope, i.e. no instructions. */
11792 *high_return = high;
11796 /* Get low and high pc attributes from a die. Return 1 if the attributes
11797 are present and valid, otherwise, return 0. Return -1 if the range is
11798 discontinuous, i.e. derived from DW_AT_ranges information. */
11801 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
11802 CORE_ADDR *highpc, struct dwarf2_cu *cu,
11803 struct partial_symtab *pst)
11805 struct attribute *attr;
11806 struct attribute *attr_high;
11808 CORE_ADDR high = 0;
11811 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
11814 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
11817 low = attr_value_as_address (attr);
11818 high = attr_value_as_address (attr_high);
11819 if (cu->header.version >= 4 && attr_form_is_constant (attr_high))
11823 /* Found high w/o low attribute. */
11826 /* Found consecutive range of addresses. */
11831 attr = dwarf2_attr (die, DW_AT_ranges, cu);
11834 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11835 We take advantage of the fact that DW_AT_ranges does not appear
11836 in DW_TAG_compile_unit of DWO files. */
11837 int need_ranges_base = die->tag != DW_TAG_compile_unit;
11838 unsigned int ranges_offset = (DW_UNSND (attr)
11839 + (need_ranges_base
11843 /* Value of the DW_AT_ranges attribute is the offset in the
11844 .debug_ranges section. */
11845 if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst))
11847 /* Found discontinuous range of addresses. */
11852 /* read_partial_die has also the strict LOW < HIGH requirement. */
11856 /* When using the GNU linker, .gnu.linkonce. sections are used to
11857 eliminate duplicate copies of functions and vtables and such.
11858 The linker will arbitrarily choose one and discard the others.
11859 The AT_*_pc values for such functions refer to local labels in
11860 these sections. If the section from that file was discarded, the
11861 labels are not in the output, so the relocs get a value of 0.
11862 If this is a discarded function, mark the pc bounds as invalid,
11863 so that GDB will ignore it. */
11864 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
11873 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
11874 its low and high PC addresses. Do nothing if these addresses could not
11875 be determined. Otherwise, set LOWPC to the low address if it is smaller,
11876 and HIGHPC to the high address if greater than HIGHPC. */
11879 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
11880 CORE_ADDR *lowpc, CORE_ADDR *highpc,
11881 struct dwarf2_cu *cu)
11883 CORE_ADDR low, high;
11884 struct die_info *child = die->child;
11886 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
11888 *lowpc = min (*lowpc, low);
11889 *highpc = max (*highpc, high);
11892 /* If the language does not allow nested subprograms (either inside
11893 subprograms or lexical blocks), we're done. */
11894 if (cu->language != language_ada)
11897 /* Check all the children of the given DIE. If it contains nested
11898 subprograms, then check their pc bounds. Likewise, we need to
11899 check lexical blocks as well, as they may also contain subprogram
11901 while (child && child->tag)
11903 if (child->tag == DW_TAG_subprogram
11904 || child->tag == DW_TAG_lexical_block)
11905 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
11906 child = sibling_die (child);
11910 /* Get the low and high pc's represented by the scope DIE, and store
11911 them in *LOWPC and *HIGHPC. If the correct values can't be
11912 determined, set *LOWPC to -1 and *HIGHPC to 0. */
11915 get_scope_pc_bounds (struct die_info *die,
11916 CORE_ADDR *lowpc, CORE_ADDR *highpc,
11917 struct dwarf2_cu *cu)
11919 CORE_ADDR best_low = (CORE_ADDR) -1;
11920 CORE_ADDR best_high = (CORE_ADDR) 0;
11921 CORE_ADDR current_low, current_high;
11923 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
11925 best_low = current_low;
11926 best_high = current_high;
11930 struct die_info *child = die->child;
11932 while (child && child->tag)
11934 switch (child->tag) {
11935 case DW_TAG_subprogram:
11936 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
11938 case DW_TAG_namespace:
11939 case DW_TAG_module:
11940 /* FIXME: carlton/2004-01-16: Should we do this for
11941 DW_TAG_class_type/DW_TAG_structure_type, too? I think
11942 that current GCC's always emit the DIEs corresponding
11943 to definitions of methods of classes as children of a
11944 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
11945 the DIEs giving the declarations, which could be
11946 anywhere). But I don't see any reason why the
11947 standards says that they have to be there. */
11948 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
11950 if (current_low != ((CORE_ADDR) -1))
11952 best_low = min (best_low, current_low);
11953 best_high = max (best_high, current_high);
11961 child = sibling_die (child);
11966 *highpc = best_high;
11969 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
11973 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
11974 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
11976 struct objfile *objfile = cu->objfile;
11977 struct attribute *attr;
11978 struct attribute *attr_high;
11980 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
11983 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
11986 CORE_ADDR low = attr_value_as_address (attr);
11987 CORE_ADDR high = attr_value_as_address (attr_high);
11989 if (cu->header.version >= 4 && attr_form_is_constant (attr_high))
11992 record_block_range (block, baseaddr + low, baseaddr + high - 1);
11996 attr = dwarf2_attr (die, DW_AT_ranges, cu);
11999 bfd *obfd = objfile->obfd;
12000 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12001 We take advantage of the fact that DW_AT_ranges does not appear
12002 in DW_TAG_compile_unit of DWO files. */
12003 int need_ranges_base = die->tag != DW_TAG_compile_unit;
12005 /* The value of the DW_AT_ranges attribute is the offset of the
12006 address range list in the .debug_ranges section. */
12007 unsigned long offset = (DW_UNSND (attr)
12008 + (need_ranges_base ? cu->ranges_base : 0));
12009 const gdb_byte *buffer;
12011 /* For some target architectures, but not others, the
12012 read_address function sign-extends the addresses it returns.
12013 To recognize base address selection entries, we need a
12015 unsigned int addr_size = cu->header.addr_size;
12016 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
12018 /* The base address, to which the next pair is relative. Note
12019 that this 'base' is a DWARF concept: most entries in a range
12020 list are relative, to reduce the number of relocs against the
12021 debugging information. This is separate from this function's
12022 'baseaddr' argument, which GDB uses to relocate debugging
12023 information from a shared library based on the address at
12024 which the library was loaded. */
12025 CORE_ADDR base = cu->base_address;
12026 int base_known = cu->base_known;
12028 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
12029 if (offset >= dwarf2_per_objfile->ranges.size)
12031 complaint (&symfile_complaints,
12032 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12036 buffer = dwarf2_per_objfile->ranges.buffer + offset;
12040 unsigned int bytes_read;
12041 CORE_ADDR start, end;
12043 start = read_address (obfd, buffer, cu, &bytes_read);
12044 buffer += bytes_read;
12045 end = read_address (obfd, buffer, cu, &bytes_read);
12046 buffer += bytes_read;
12048 /* Did we find the end of the range list? */
12049 if (start == 0 && end == 0)
12052 /* Did we find a base address selection entry? */
12053 else if ((start & base_select_mask) == base_select_mask)
12059 /* We found an ordinary address range. */
12064 complaint (&symfile_complaints,
12065 _("Invalid .debug_ranges data "
12066 "(no base address)"));
12072 /* Inverted range entries are invalid. */
12073 complaint (&symfile_complaints,
12074 _("Invalid .debug_ranges data "
12075 "(inverted range)"));
12079 /* Empty range entries have no effect. */
12083 start += base + baseaddr;
12084 end += base + baseaddr;
12086 /* A not-uncommon case of bad debug info.
12087 Don't pollute the addrmap with bad data. */
12088 if (start == 0 && !dwarf2_per_objfile->has_section_at_zero)
12090 complaint (&symfile_complaints,
12091 _(".debug_ranges entry has start address of zero"
12092 " [in module %s]"), objfile_name (objfile));
12096 record_block_range (block, start, end - 1);
12102 /* Check whether the producer field indicates either of GCC < 4.6, or the
12103 Intel C/C++ compiler, and cache the result in CU. */
12106 check_producer (struct dwarf2_cu *cu)
12109 int major, minor, release;
12111 if (cu->producer == NULL)
12113 /* For unknown compilers expect their behavior is DWARF version
12116 GCC started to support .debug_types sections by -gdwarf-4 since
12117 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12118 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12119 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12120 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12122 else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0)
12124 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
12126 cs = &cu->producer[strlen ("GNU ")];
12127 while (*cs && !isdigit (*cs))
12129 if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3)
12131 /* Not recognized as GCC. */
12135 cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6);
12136 cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3);
12139 else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0)
12140 cu->producer_is_icc = 1;
12143 /* For other non-GCC compilers, expect their behavior is DWARF version
12147 cu->checked_producer = 1;
12150 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12151 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12152 during 4.6.0 experimental. */
12155 producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu)
12157 if (!cu->checked_producer)
12158 check_producer (cu);
12160 return cu->producer_is_gxx_lt_4_6;
12163 /* Return the default accessibility type if it is not overriden by
12164 DW_AT_accessibility. */
12166 static enum dwarf_access_attribute
12167 dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu)
12169 if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu))
12171 /* The default DWARF 2 accessibility for members is public, the default
12172 accessibility for inheritance is private. */
12174 if (die->tag != DW_TAG_inheritance)
12175 return DW_ACCESS_public;
12177 return DW_ACCESS_private;
12181 /* DWARF 3+ defines the default accessibility a different way. The same
12182 rules apply now for DW_TAG_inheritance as for the members and it only
12183 depends on the container kind. */
12185 if (die->parent->tag == DW_TAG_class_type)
12186 return DW_ACCESS_private;
12188 return DW_ACCESS_public;
12192 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12193 offset. If the attribute was not found return 0, otherwise return
12194 1. If it was found but could not properly be handled, set *OFFSET
12198 handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu,
12201 struct attribute *attr;
12203 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
12208 /* Note that we do not check for a section offset first here.
12209 This is because DW_AT_data_member_location is new in DWARF 4,
12210 so if we see it, we can assume that a constant form is really
12211 a constant and not a section offset. */
12212 if (attr_form_is_constant (attr))
12213 *offset = dwarf2_get_attr_constant_value (attr, 0);
12214 else if (attr_form_is_section_offset (attr))
12215 dwarf2_complex_location_expr_complaint ();
12216 else if (attr_form_is_block (attr))
12217 *offset = decode_locdesc (DW_BLOCK (attr), cu);
12219 dwarf2_complex_location_expr_complaint ();
12227 /* Add an aggregate field to the field list. */
12230 dwarf2_add_field (struct field_info *fip, struct die_info *die,
12231 struct dwarf2_cu *cu)
12233 struct objfile *objfile = cu->objfile;
12234 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12235 struct nextfield *new_field;
12236 struct attribute *attr;
12238 const char *fieldname = "";
12240 /* Allocate a new field list entry and link it in. */
12241 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
12242 make_cleanup (xfree, new_field);
12243 memset (new_field, 0, sizeof (struct nextfield));
12245 if (die->tag == DW_TAG_inheritance)
12247 new_field->next = fip->baseclasses;
12248 fip->baseclasses = new_field;
12252 new_field->next = fip->fields;
12253 fip->fields = new_field;
12257 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
12259 new_field->accessibility = DW_UNSND (attr);
12261 new_field->accessibility = dwarf2_default_access_attribute (die, cu);
12262 if (new_field->accessibility != DW_ACCESS_public)
12263 fip->non_public_fields = 1;
12265 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
12267 new_field->virtuality = DW_UNSND (attr);
12269 new_field->virtuality = DW_VIRTUALITY_none;
12271 fp = &new_field->field;
12273 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
12277 /* Data member other than a C++ static data member. */
12279 /* Get type of field. */
12280 fp->type = die_type (die, cu);
12282 SET_FIELD_BITPOS (*fp, 0);
12284 /* Get bit size of field (zero if none). */
12285 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
12288 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
12292 FIELD_BITSIZE (*fp) = 0;
12295 /* Get bit offset of field. */
12296 if (handle_data_member_location (die, cu, &offset))
12297 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
12298 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
12301 if (gdbarch_bits_big_endian (gdbarch))
12303 /* For big endian bits, the DW_AT_bit_offset gives the
12304 additional bit offset from the MSB of the containing
12305 anonymous object to the MSB of the field. We don't
12306 have to do anything special since we don't need to
12307 know the size of the anonymous object. */
12308 SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr));
12312 /* For little endian bits, compute the bit offset to the
12313 MSB of the anonymous object, subtract off the number of
12314 bits from the MSB of the field to the MSB of the
12315 object, and then subtract off the number of bits of
12316 the field itself. The result is the bit offset of
12317 the LSB of the field. */
12318 int anonymous_size;
12319 int bit_offset = DW_UNSND (attr);
12321 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12324 /* The size of the anonymous object containing
12325 the bit field is explicit, so use the
12326 indicated size (in bytes). */
12327 anonymous_size = DW_UNSND (attr);
12331 /* The size of the anonymous object containing
12332 the bit field must be inferred from the type
12333 attribute of the data member containing the
12335 anonymous_size = TYPE_LENGTH (fp->type);
12337 SET_FIELD_BITPOS (*fp,
12338 (FIELD_BITPOS (*fp)
12339 + anonymous_size * bits_per_byte
12340 - bit_offset - FIELD_BITSIZE (*fp)));
12344 /* Get name of field. */
12345 fieldname = dwarf2_name (die, cu);
12346 if (fieldname == NULL)
12349 /* The name is already allocated along with this objfile, so we don't
12350 need to duplicate it for the type. */
12351 fp->name = fieldname;
12353 /* Change accessibility for artificial fields (e.g. virtual table
12354 pointer or virtual base class pointer) to private. */
12355 if (dwarf2_attr (die, DW_AT_artificial, cu))
12357 FIELD_ARTIFICIAL (*fp) = 1;
12358 new_field->accessibility = DW_ACCESS_private;
12359 fip->non_public_fields = 1;
12362 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
12364 /* C++ static member. */
12366 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12367 is a declaration, but all versions of G++ as of this writing
12368 (so through at least 3.2.1) incorrectly generate
12369 DW_TAG_variable tags. */
12371 const char *physname;
12373 /* Get name of field. */
12374 fieldname = dwarf2_name (die, cu);
12375 if (fieldname == NULL)
12378 attr = dwarf2_attr (die, DW_AT_const_value, cu);
12380 /* Only create a symbol if this is an external value.
12381 new_symbol checks this and puts the value in the global symbol
12382 table, which we want. If it is not external, new_symbol
12383 will try to put the value in cu->list_in_scope which is wrong. */
12384 && dwarf2_flag_true_p (die, DW_AT_external, cu))
12386 /* A static const member, not much different than an enum as far as
12387 we're concerned, except that we can support more types. */
12388 new_symbol (die, NULL, cu);
12391 /* Get physical name. */
12392 physname = dwarf2_physname (fieldname, die, cu);
12394 /* The name is already allocated along with this objfile, so we don't
12395 need to duplicate it for the type. */
12396 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
12397 FIELD_TYPE (*fp) = die_type (die, cu);
12398 FIELD_NAME (*fp) = fieldname;
12400 else if (die->tag == DW_TAG_inheritance)
12404 /* C++ base class field. */
12405 if (handle_data_member_location (die, cu, &offset))
12406 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
12407 FIELD_BITSIZE (*fp) = 0;
12408 FIELD_TYPE (*fp) = die_type (die, cu);
12409 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
12410 fip->nbaseclasses++;
12414 /* Add a typedef defined in the scope of the FIP's class. */
12417 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
12418 struct dwarf2_cu *cu)
12420 struct objfile *objfile = cu->objfile;
12421 struct typedef_field_list *new_field;
12422 struct attribute *attr;
12423 struct typedef_field *fp;
12424 char *fieldname = "";
12426 /* Allocate a new field list entry and link it in. */
12427 new_field = xzalloc (sizeof (*new_field));
12428 make_cleanup (xfree, new_field);
12430 gdb_assert (die->tag == DW_TAG_typedef);
12432 fp = &new_field->field;
12434 /* Get name of field. */
12435 fp->name = dwarf2_name (die, cu);
12436 if (fp->name == NULL)
12439 fp->type = read_type_die (die, cu);
12441 new_field->next = fip->typedef_field_list;
12442 fip->typedef_field_list = new_field;
12443 fip->typedef_field_list_count++;
12446 /* Create the vector of fields, and attach it to the type. */
12449 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
12450 struct dwarf2_cu *cu)
12452 int nfields = fip->nfields;
12454 /* Record the field count, allocate space for the array of fields,
12455 and create blank accessibility bitfields if necessary. */
12456 TYPE_NFIELDS (type) = nfields;
12457 TYPE_FIELDS (type) = (struct field *)
12458 TYPE_ALLOC (type, sizeof (struct field) * nfields);
12459 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
12461 if (fip->non_public_fields && cu->language != language_ada)
12463 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12465 TYPE_FIELD_PRIVATE_BITS (type) =
12466 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
12467 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
12469 TYPE_FIELD_PROTECTED_BITS (type) =
12470 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
12471 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
12473 TYPE_FIELD_IGNORE_BITS (type) =
12474 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
12475 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
12478 /* If the type has baseclasses, allocate and clear a bit vector for
12479 TYPE_FIELD_VIRTUAL_BITS. */
12480 if (fip->nbaseclasses && cu->language != language_ada)
12482 int num_bytes = B_BYTES (fip->nbaseclasses);
12483 unsigned char *pointer;
12485 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12486 pointer = TYPE_ALLOC (type, num_bytes);
12487 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
12488 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
12489 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
12492 /* Copy the saved-up fields into the field vector. Start from the head of
12493 the list, adding to the tail of the field array, so that they end up in
12494 the same order in the array in which they were added to the list. */
12495 while (nfields-- > 0)
12497 struct nextfield *fieldp;
12501 fieldp = fip->fields;
12502 fip->fields = fieldp->next;
12506 fieldp = fip->baseclasses;
12507 fip->baseclasses = fieldp->next;
12510 TYPE_FIELD (type, nfields) = fieldp->field;
12511 switch (fieldp->accessibility)
12513 case DW_ACCESS_private:
12514 if (cu->language != language_ada)
12515 SET_TYPE_FIELD_PRIVATE (type, nfields);
12518 case DW_ACCESS_protected:
12519 if (cu->language != language_ada)
12520 SET_TYPE_FIELD_PROTECTED (type, nfields);
12523 case DW_ACCESS_public:
12527 /* Unknown accessibility. Complain and treat it as public. */
12529 complaint (&symfile_complaints, _("unsupported accessibility %d"),
12530 fieldp->accessibility);
12534 if (nfields < fip->nbaseclasses)
12536 switch (fieldp->virtuality)
12538 case DW_VIRTUALITY_virtual:
12539 case DW_VIRTUALITY_pure_virtual:
12540 if (cu->language == language_ada)
12541 error (_("unexpected virtuality in component of Ada type"));
12542 SET_TYPE_FIELD_VIRTUAL (type, nfields);
12549 /* Return true if this member function is a constructor, false
12553 dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu)
12555 const char *fieldname;
12556 const char *typename;
12559 if (die->parent == NULL)
12562 if (die->parent->tag != DW_TAG_structure_type
12563 && die->parent->tag != DW_TAG_union_type
12564 && die->parent->tag != DW_TAG_class_type)
12567 fieldname = dwarf2_name (die, cu);
12568 typename = dwarf2_name (die->parent, cu);
12569 if (fieldname == NULL || typename == NULL)
12572 len = strlen (fieldname);
12573 return (strncmp (fieldname, typename, len) == 0
12574 && (typename[len] == '\0' || typename[len] == '<'));
12577 /* Add a member function to the proper fieldlist. */
12580 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
12581 struct type *type, struct dwarf2_cu *cu)
12583 struct objfile *objfile = cu->objfile;
12584 struct attribute *attr;
12585 struct fnfieldlist *flp;
12587 struct fn_field *fnp;
12588 const char *fieldname;
12589 struct nextfnfield *new_fnfield;
12590 struct type *this_type;
12591 enum dwarf_access_attribute accessibility;
12593 if (cu->language == language_ada)
12594 error (_("unexpected member function in Ada type"));
12596 /* Get name of member function. */
12597 fieldname = dwarf2_name (die, cu);
12598 if (fieldname == NULL)
12601 /* Look up member function name in fieldlist. */
12602 for (i = 0; i < fip->nfnfields; i++)
12604 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
12608 /* Create new list element if necessary. */
12609 if (i < fip->nfnfields)
12610 flp = &fip->fnfieldlists[i];
12613 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
12615 fip->fnfieldlists = (struct fnfieldlist *)
12616 xrealloc (fip->fnfieldlists,
12617 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
12618 * sizeof (struct fnfieldlist));
12619 if (fip->nfnfields == 0)
12620 make_cleanup (free_current_contents, &fip->fnfieldlists);
12622 flp = &fip->fnfieldlists[fip->nfnfields];
12623 flp->name = fieldname;
12626 i = fip->nfnfields++;
12629 /* Create a new member function field and chain it to the field list
12631 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
12632 make_cleanup (xfree, new_fnfield);
12633 memset (new_fnfield, 0, sizeof (struct nextfnfield));
12634 new_fnfield->next = flp->head;
12635 flp->head = new_fnfield;
12638 /* Fill in the member function field info. */
12639 fnp = &new_fnfield->fnfield;
12641 /* Delay processing of the physname until later. */
12642 if (cu->language == language_cplus || cu->language == language_java)
12644 add_to_method_list (type, i, flp->length - 1, fieldname,
12649 const char *physname = dwarf2_physname (fieldname, die, cu);
12650 fnp->physname = physname ? physname : "";
12653 fnp->type = alloc_type (objfile);
12654 this_type = read_type_die (die, cu);
12655 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
12657 int nparams = TYPE_NFIELDS (this_type);
12659 /* TYPE is the domain of this method, and THIS_TYPE is the type
12660 of the method itself (TYPE_CODE_METHOD). */
12661 smash_to_method_type (fnp->type, type,
12662 TYPE_TARGET_TYPE (this_type),
12663 TYPE_FIELDS (this_type),
12664 TYPE_NFIELDS (this_type),
12665 TYPE_VARARGS (this_type));
12667 /* Handle static member functions.
12668 Dwarf2 has no clean way to discern C++ static and non-static
12669 member functions. G++ helps GDB by marking the first
12670 parameter for non-static member functions (which is the this
12671 pointer) as artificial. We obtain this information from
12672 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12673 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
12674 fnp->voffset = VOFFSET_STATIC;
12677 complaint (&symfile_complaints, _("member function type missing for '%s'"),
12678 dwarf2_full_name (fieldname, die, cu));
12680 /* Get fcontext from DW_AT_containing_type if present. */
12681 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
12682 fnp->fcontext = die_containing_type (die, cu);
12684 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12685 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12687 /* Get accessibility. */
12688 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
12690 accessibility = DW_UNSND (attr);
12692 accessibility = dwarf2_default_access_attribute (die, cu);
12693 switch (accessibility)
12695 case DW_ACCESS_private:
12696 fnp->is_private = 1;
12698 case DW_ACCESS_protected:
12699 fnp->is_protected = 1;
12703 /* Check for artificial methods. */
12704 attr = dwarf2_attr (die, DW_AT_artificial, cu);
12705 if (attr && DW_UNSND (attr) != 0)
12706 fnp->is_artificial = 1;
12708 fnp->is_constructor = dwarf2_is_constructor (die, cu);
12710 /* Get index in virtual function table if it is a virtual member
12711 function. For older versions of GCC, this is an offset in the
12712 appropriate virtual table, as specified by DW_AT_containing_type.
12713 For everyone else, it is an expression to be evaluated relative
12714 to the object address. */
12716 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
12719 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
12721 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
12723 /* Old-style GCC. */
12724 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
12726 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
12727 || (DW_BLOCK (attr)->size > 1
12728 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
12729 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
12731 struct dwarf_block blk;
12734 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
12736 blk.size = DW_BLOCK (attr)->size - offset;
12737 blk.data = DW_BLOCK (attr)->data + offset;
12738 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
12739 if ((fnp->voffset % cu->header.addr_size) != 0)
12740 dwarf2_complex_location_expr_complaint ();
12742 fnp->voffset /= cu->header.addr_size;
12746 dwarf2_complex_location_expr_complaint ();
12748 if (!fnp->fcontext)
12749 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
12751 else if (attr_form_is_section_offset (attr))
12753 dwarf2_complex_location_expr_complaint ();
12757 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12763 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
12764 if (attr && DW_UNSND (attr))
12766 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12767 complaint (&symfile_complaints,
12768 _("Member function \"%s\" (offset %d) is virtual "
12769 "but the vtable offset is not specified"),
12770 fieldname, die->offset.sect_off);
12771 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12772 TYPE_CPLUS_DYNAMIC (type) = 1;
12777 /* Create the vector of member function fields, and attach it to the type. */
12780 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
12781 struct dwarf2_cu *cu)
12783 struct fnfieldlist *flp;
12786 if (cu->language == language_ada)
12787 error (_("unexpected member functions in Ada type"));
12789 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12790 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
12791 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
12793 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
12795 struct nextfnfield *nfp = flp->head;
12796 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
12799 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
12800 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
12801 fn_flp->fn_fields = (struct fn_field *)
12802 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
12803 for (k = flp->length; (k--, nfp); nfp = nfp->next)
12804 fn_flp->fn_fields[k] = nfp->fnfield;
12807 TYPE_NFN_FIELDS (type) = fip->nfnfields;
12810 /* Returns non-zero if NAME is the name of a vtable member in CU's
12811 language, zero otherwise. */
12813 is_vtable_name (const char *name, struct dwarf2_cu *cu)
12815 static const char vptr[] = "_vptr";
12816 static const char vtable[] = "vtable";
12818 /* Look for the C++ and Java forms of the vtable. */
12819 if ((cu->language == language_java
12820 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
12821 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
12822 && is_cplus_marker (name[sizeof (vptr) - 1])))
12828 /* GCC outputs unnamed structures that are really pointers to member
12829 functions, with the ABI-specified layout. If TYPE describes
12830 such a structure, smash it into a member function type.
12832 GCC shouldn't do this; it should just output pointer to member DIEs.
12833 This is GCC PR debug/28767. */
12836 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
12838 struct type *pfn_type, *domain_type, *new_type;
12840 /* Check for a structure with no name and two children. */
12841 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
12844 /* Check for __pfn and __delta members. */
12845 if (TYPE_FIELD_NAME (type, 0) == NULL
12846 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
12847 || TYPE_FIELD_NAME (type, 1) == NULL
12848 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
12851 /* Find the type of the method. */
12852 pfn_type = TYPE_FIELD_TYPE (type, 0);
12853 if (pfn_type == NULL
12854 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
12855 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
12858 /* Look for the "this" argument. */
12859 pfn_type = TYPE_TARGET_TYPE (pfn_type);
12860 if (TYPE_NFIELDS (pfn_type) == 0
12861 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
12862 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
12865 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
12866 new_type = alloc_type (objfile);
12867 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
12868 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
12869 TYPE_VARARGS (pfn_type));
12870 smash_to_methodptr_type (type, new_type);
12873 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
12877 producer_is_icc (struct dwarf2_cu *cu)
12879 if (!cu->checked_producer)
12880 check_producer (cu);
12882 return cu->producer_is_icc;
12885 /* Called when we find the DIE that starts a structure or union scope
12886 (definition) to create a type for the structure or union. Fill in
12887 the type's name and general properties; the members will not be
12888 processed until process_structure_scope. A symbol table entry for
12889 the type will also not be done until process_structure_scope (assuming
12890 the type has a name).
12892 NOTE: we need to call these functions regardless of whether or not the
12893 DIE has a DW_AT_name attribute, since it might be an anonymous
12894 structure or union. This gets the type entered into our set of
12895 user defined types. */
12897 static struct type *
12898 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
12900 struct objfile *objfile = cu->objfile;
12902 struct attribute *attr;
12905 /* If the definition of this type lives in .debug_types, read that type.
12906 Don't follow DW_AT_specification though, that will take us back up
12907 the chain and we want to go down. */
12908 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
12911 type = get_DW_AT_signature_type (die, attr, cu);
12913 /* The type's CU may not be the same as CU.
12914 Ensure TYPE is recorded with CU in die_type_hash. */
12915 return set_die_type (die, type, cu);
12918 type = alloc_type (objfile);
12919 INIT_CPLUS_SPECIFIC (type);
12921 name = dwarf2_name (die, cu);
12924 if (cu->language == language_cplus
12925 || cu->language == language_java)
12927 const char *full_name = dwarf2_full_name (name, die, cu);
12929 /* dwarf2_full_name might have already finished building the DIE's
12930 type. If so, there is no need to continue. */
12931 if (get_die_type (die, cu) != NULL)
12932 return get_die_type (die, cu);
12934 TYPE_TAG_NAME (type) = full_name;
12935 if (die->tag == DW_TAG_structure_type
12936 || die->tag == DW_TAG_class_type)
12937 TYPE_NAME (type) = TYPE_TAG_NAME (type);
12941 /* The name is already allocated along with this objfile, so
12942 we don't need to duplicate it for the type. */
12943 TYPE_TAG_NAME (type) = name;
12944 if (die->tag == DW_TAG_class_type)
12945 TYPE_NAME (type) = TYPE_TAG_NAME (type);
12949 if (die->tag == DW_TAG_structure_type)
12951 TYPE_CODE (type) = TYPE_CODE_STRUCT;
12953 else if (die->tag == DW_TAG_union_type)
12955 TYPE_CODE (type) = TYPE_CODE_UNION;
12959 TYPE_CODE (type) = TYPE_CODE_CLASS;
12962 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
12963 TYPE_DECLARED_CLASS (type) = 1;
12965 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12968 TYPE_LENGTH (type) = DW_UNSND (attr);
12972 TYPE_LENGTH (type) = 0;
12975 if (producer_is_icc (cu))
12977 /* ICC does not output the required DW_AT_declaration
12978 on incomplete types, but gives them a size of zero. */
12981 TYPE_STUB_SUPPORTED (type) = 1;
12983 if (die_is_declaration (die, cu))
12984 TYPE_STUB (type) = 1;
12985 else if (attr == NULL && die->child == NULL
12986 && producer_is_realview (cu->producer))
12987 /* RealView does not output the required DW_AT_declaration
12988 on incomplete types. */
12989 TYPE_STUB (type) = 1;
12991 /* We need to add the type field to the die immediately so we don't
12992 infinitely recurse when dealing with pointers to the structure
12993 type within the structure itself. */
12994 set_die_type (die, type, cu);
12996 /* set_die_type should be already done. */
12997 set_descriptive_type (type, die, cu);
13002 /* Finish creating a structure or union type, including filling in
13003 its members and creating a symbol for it. */
13006 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
13008 struct objfile *objfile = cu->objfile;
13009 struct die_info *child_die = die->child;
13012 type = get_die_type (die, cu);
13014 type = read_structure_type (die, cu);
13016 if (die->child != NULL && ! die_is_declaration (die, cu))
13018 struct field_info fi;
13019 struct die_info *child_die;
13020 VEC (symbolp) *template_args = NULL;
13021 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
13023 memset (&fi, 0, sizeof (struct field_info));
13025 child_die = die->child;
13027 while (child_die && child_die->tag)
13029 if (child_die->tag == DW_TAG_member
13030 || child_die->tag == DW_TAG_variable)
13032 /* NOTE: carlton/2002-11-05: A C++ static data member
13033 should be a DW_TAG_member that is a declaration, but
13034 all versions of G++ as of this writing (so through at
13035 least 3.2.1) incorrectly generate DW_TAG_variable
13036 tags for them instead. */
13037 dwarf2_add_field (&fi, child_die, cu);
13039 else if (child_die->tag == DW_TAG_subprogram)
13041 /* C++ member function. */
13042 dwarf2_add_member_fn (&fi, child_die, type, cu);
13044 else if (child_die->tag == DW_TAG_inheritance)
13046 /* C++ base class field. */
13047 dwarf2_add_field (&fi, child_die, cu);
13049 else if (child_die->tag == DW_TAG_typedef)
13050 dwarf2_add_typedef (&fi, child_die, cu);
13051 else if (child_die->tag == DW_TAG_template_type_param
13052 || child_die->tag == DW_TAG_template_value_param)
13054 struct symbol *arg = new_symbol (child_die, NULL, cu);
13057 VEC_safe_push (symbolp, template_args, arg);
13060 child_die = sibling_die (child_die);
13063 /* Attach template arguments to type. */
13064 if (! VEC_empty (symbolp, template_args))
13066 ALLOCATE_CPLUS_STRUCT_TYPE (type);
13067 TYPE_N_TEMPLATE_ARGUMENTS (type)
13068 = VEC_length (symbolp, template_args);
13069 TYPE_TEMPLATE_ARGUMENTS (type)
13070 = obstack_alloc (&objfile->objfile_obstack,
13071 (TYPE_N_TEMPLATE_ARGUMENTS (type)
13072 * sizeof (struct symbol *)));
13073 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
13074 VEC_address (symbolp, template_args),
13075 (TYPE_N_TEMPLATE_ARGUMENTS (type)
13076 * sizeof (struct symbol *)));
13077 VEC_free (symbolp, template_args);
13080 /* Attach fields and member functions to the type. */
13082 dwarf2_attach_fields_to_type (&fi, type, cu);
13085 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
13087 /* Get the type which refers to the base class (possibly this
13088 class itself) which contains the vtable pointer for the current
13089 class from the DW_AT_containing_type attribute. This use of
13090 DW_AT_containing_type is a GNU extension. */
13092 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
13094 struct type *t = die_containing_type (die, cu);
13096 TYPE_VPTR_BASETYPE (type) = t;
13101 /* Our own class provides vtbl ptr. */
13102 for (i = TYPE_NFIELDS (t) - 1;
13103 i >= TYPE_N_BASECLASSES (t);
13106 const char *fieldname = TYPE_FIELD_NAME (t, i);
13108 if (is_vtable_name (fieldname, cu))
13110 TYPE_VPTR_FIELDNO (type) = i;
13115 /* Complain if virtual function table field not found. */
13116 if (i < TYPE_N_BASECLASSES (t))
13117 complaint (&symfile_complaints,
13118 _("virtual function table pointer "
13119 "not found when defining class '%s'"),
13120 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
13125 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
13128 else if (cu->producer
13129 && strncmp (cu->producer,
13130 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
13132 /* The IBM XLC compiler does not provide direct indication
13133 of the containing type, but the vtable pointer is
13134 always named __vfp. */
13138 for (i = TYPE_NFIELDS (type) - 1;
13139 i >= TYPE_N_BASECLASSES (type);
13142 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
13144 TYPE_VPTR_FIELDNO (type) = i;
13145 TYPE_VPTR_BASETYPE (type) = type;
13152 /* Copy fi.typedef_field_list linked list elements content into the
13153 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13154 if (fi.typedef_field_list)
13156 int i = fi.typedef_field_list_count;
13158 ALLOCATE_CPLUS_STRUCT_TYPE (type);
13159 TYPE_TYPEDEF_FIELD_ARRAY (type)
13160 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
13161 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
13163 /* Reverse the list order to keep the debug info elements order. */
13166 struct typedef_field *dest, *src;
13168 dest = &TYPE_TYPEDEF_FIELD (type, i);
13169 src = &fi.typedef_field_list->field;
13170 fi.typedef_field_list = fi.typedef_field_list->next;
13175 do_cleanups (back_to);
13177 if (HAVE_CPLUS_STRUCT (type))
13178 TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java;
13181 quirk_gcc_member_function_pointer (type, objfile);
13183 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13184 snapshots) has been known to create a die giving a declaration
13185 for a class that has, as a child, a die giving a definition for a
13186 nested class. So we have to process our children even if the
13187 current die is a declaration. Normally, of course, a declaration
13188 won't have any children at all. */
13190 while (child_die != NULL && child_die->tag)
13192 if (child_die->tag == DW_TAG_member
13193 || child_die->tag == DW_TAG_variable
13194 || child_die->tag == DW_TAG_inheritance
13195 || child_die->tag == DW_TAG_template_value_param
13196 || child_die->tag == DW_TAG_template_type_param)
13201 process_die (child_die, cu);
13203 child_die = sibling_die (child_die);
13206 /* Do not consider external references. According to the DWARF standard,
13207 these DIEs are identified by the fact that they have no byte_size
13208 attribute, and a declaration attribute. */
13209 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
13210 || !die_is_declaration (die, cu))
13211 new_symbol (die, type, cu);
13214 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13215 update TYPE using some information only available in DIE's children. */
13218 update_enumeration_type_from_children (struct die_info *die,
13220 struct dwarf2_cu *cu)
13222 struct obstack obstack;
13223 struct die_info *child_die = die->child;
13224 int unsigned_enum = 1;
13227 struct cleanup *old_chain;
13229 obstack_init (&obstack);
13230 old_chain = make_cleanup_obstack_free (&obstack);
13232 while (child_die != NULL && child_die->tag)
13234 struct attribute *attr;
13236 const gdb_byte *bytes;
13237 struct dwarf2_locexpr_baton *baton;
13239 if (child_die->tag != DW_TAG_enumerator)
13242 attr = dwarf2_attr (child_die, DW_AT_const_value, cu);
13246 name = dwarf2_name (child_die, cu);
13248 name = "<anonymous enumerator>";
13250 dwarf2_const_value_attr (attr, type, name, &obstack, cu,
13251 &value, &bytes, &baton);
13257 else if ((mask & value) != 0)
13262 /* If we already know that the enum type is neither unsigned, nor
13263 a flag type, no need to look at the rest of the enumerates. */
13264 if (!unsigned_enum && !flag_enum)
13266 child_die = sibling_die (child_die);
13270 TYPE_UNSIGNED (type) = 1;
13272 TYPE_FLAG_ENUM (type) = 1;
13274 do_cleanups (old_chain);
13277 /* Given a DW_AT_enumeration_type die, set its type. We do not
13278 complete the type's fields yet, or create any symbols. */
13280 static struct type *
13281 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
13283 struct objfile *objfile = cu->objfile;
13285 struct attribute *attr;
13288 /* If the definition of this type lives in .debug_types, read that type.
13289 Don't follow DW_AT_specification though, that will take us back up
13290 the chain and we want to go down. */
13291 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
13294 type = get_DW_AT_signature_type (die, attr, cu);
13296 /* The type's CU may not be the same as CU.
13297 Ensure TYPE is recorded with CU in die_type_hash. */
13298 return set_die_type (die, type, cu);
13301 type = alloc_type (objfile);
13303 TYPE_CODE (type) = TYPE_CODE_ENUM;
13304 name = dwarf2_full_name (NULL, die, cu);
13306 TYPE_TAG_NAME (type) = name;
13308 attr = dwarf2_attr (die, DW_AT_type, cu);
13311 struct type *underlying_type = die_type (die, cu);
13313 TYPE_TARGET_TYPE (type) = underlying_type;
13316 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13319 TYPE_LENGTH (type) = DW_UNSND (attr);
13323 TYPE_LENGTH (type) = 0;
13326 /* The enumeration DIE can be incomplete. In Ada, any type can be
13327 declared as private in the package spec, and then defined only
13328 inside the package body. Such types are known as Taft Amendment
13329 Types. When another package uses such a type, an incomplete DIE
13330 may be generated by the compiler. */
13331 if (die_is_declaration (die, cu))
13332 TYPE_STUB (type) = 1;
13334 /* Finish the creation of this type by using the enum's children.
13335 We must call this even when the underlying type has been provided
13336 so that we can determine if we're looking at a "flag" enum. */
13337 update_enumeration_type_from_children (die, type, cu);
13339 /* If this type has an underlying type that is not a stub, then we
13340 may use its attributes. We always use the "unsigned" attribute
13341 in this situation, because ordinarily we guess whether the type
13342 is unsigned -- but the guess can be wrong and the underlying type
13343 can tell us the reality. However, we defer to a local size
13344 attribute if one exists, because this lets the compiler override
13345 the underlying type if needed. */
13346 if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type)))
13348 TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type));
13349 if (TYPE_LENGTH (type) == 0)
13350 TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type));
13353 TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu);
13355 return set_die_type (die, type, cu);
13358 /* Given a pointer to a die which begins an enumeration, process all
13359 the dies that define the members of the enumeration, and create the
13360 symbol for the enumeration type.
13362 NOTE: We reverse the order of the element list. */
13365 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
13367 struct type *this_type;
13369 this_type = get_die_type (die, cu);
13370 if (this_type == NULL)
13371 this_type = read_enumeration_type (die, cu);
13373 if (die->child != NULL)
13375 struct die_info *child_die;
13376 struct symbol *sym;
13377 struct field *fields = NULL;
13378 int num_fields = 0;
13381 child_die = die->child;
13382 while (child_die && child_die->tag)
13384 if (child_die->tag != DW_TAG_enumerator)
13386 process_die (child_die, cu);
13390 name = dwarf2_name (child_die, cu);
13393 sym = new_symbol (child_die, this_type, cu);
13395 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
13397 fields = (struct field *)
13399 (num_fields + DW_FIELD_ALLOC_CHUNK)
13400 * sizeof (struct field));
13403 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
13404 FIELD_TYPE (fields[num_fields]) = NULL;
13405 SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym));
13406 FIELD_BITSIZE (fields[num_fields]) = 0;
13412 child_die = sibling_die (child_die);
13417 TYPE_NFIELDS (this_type) = num_fields;
13418 TYPE_FIELDS (this_type) = (struct field *)
13419 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
13420 memcpy (TYPE_FIELDS (this_type), fields,
13421 sizeof (struct field) * num_fields);
13426 /* If we are reading an enum from a .debug_types unit, and the enum
13427 is a declaration, and the enum is not the signatured type in the
13428 unit, then we do not want to add a symbol for it. Adding a
13429 symbol would in some cases obscure the true definition of the
13430 enum, giving users an incomplete type when the definition is
13431 actually available. Note that we do not want to do this for all
13432 enums which are just declarations, because C++0x allows forward
13433 enum declarations. */
13434 if (cu->per_cu->is_debug_types
13435 && die_is_declaration (die, cu))
13437 struct signatured_type *sig_type;
13439 sig_type = (struct signatured_type *) cu->per_cu;
13440 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
13441 if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off)
13445 new_symbol (die, this_type, cu);
13448 /* Extract all information from a DW_TAG_array_type DIE and put it in
13449 the DIE's type field. For now, this only handles one dimensional
13452 static struct type *
13453 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
13455 struct objfile *objfile = cu->objfile;
13456 struct die_info *child_die;
13458 struct type *element_type, *range_type, *index_type;
13459 struct type **range_types = NULL;
13460 struct attribute *attr;
13462 struct cleanup *back_to;
13464 unsigned int bit_stride = 0;
13466 element_type = die_type (die, cu);
13468 /* The die_type call above may have already set the type for this DIE. */
13469 type = get_die_type (die, cu);
13473 attr = dwarf2_attr (die, DW_AT_byte_stride, cu);
13475 bit_stride = DW_UNSND (attr) * 8;
13477 attr = dwarf2_attr (die, DW_AT_bit_stride, cu);
13479 bit_stride = DW_UNSND (attr);
13481 /* Irix 6.2 native cc creates array types without children for
13482 arrays with unspecified length. */
13483 if (die->child == NULL)
13485 index_type = objfile_type (objfile)->builtin_int;
13486 range_type = create_static_range_type (NULL, index_type, 0, -1);
13487 type = create_array_type_with_stride (NULL, element_type, range_type,
13489 return set_die_type (die, type, cu);
13492 back_to = make_cleanup (null_cleanup, NULL);
13493 child_die = die->child;
13494 while (child_die && child_die->tag)
13496 if (child_die->tag == DW_TAG_subrange_type)
13498 struct type *child_type = read_type_die (child_die, cu);
13500 if (child_type != NULL)
13502 /* The range type was succesfully read. Save it for the
13503 array type creation. */
13504 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
13506 range_types = (struct type **)
13507 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
13508 * sizeof (struct type *));
13510 make_cleanup (free_current_contents, &range_types);
13512 range_types[ndim++] = child_type;
13515 child_die = sibling_die (child_die);
13518 /* Dwarf2 dimensions are output from left to right, create the
13519 necessary array types in backwards order. */
13521 type = element_type;
13523 if (read_array_order (die, cu) == DW_ORD_col_major)
13528 type = create_array_type_with_stride (NULL, type, range_types[i++],
13534 type = create_array_type_with_stride (NULL, type, range_types[ndim],
13538 /* Understand Dwarf2 support for vector types (like they occur on
13539 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13540 array type. This is not part of the Dwarf2/3 standard yet, but a
13541 custom vendor extension. The main difference between a regular
13542 array and the vector variant is that vectors are passed by value
13544 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
13546 make_vector_type (type);
13548 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13549 implementation may choose to implement triple vectors using this
13551 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13554 if (DW_UNSND (attr) >= TYPE_LENGTH (type))
13555 TYPE_LENGTH (type) = DW_UNSND (attr);
13557 complaint (&symfile_complaints,
13558 _("DW_AT_byte_size for array type smaller "
13559 "than the total size of elements"));
13562 name = dwarf2_name (die, cu);
13564 TYPE_NAME (type) = name;
13566 /* Install the type in the die. */
13567 set_die_type (die, type, cu);
13569 /* set_die_type should be already done. */
13570 set_descriptive_type (type, die, cu);
13572 do_cleanups (back_to);
13577 static enum dwarf_array_dim_ordering
13578 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
13580 struct attribute *attr;
13582 attr = dwarf2_attr (die, DW_AT_ordering, cu);
13584 if (attr) return DW_SND (attr);
13586 /* GNU F77 is a special case, as at 08/2004 array type info is the
13587 opposite order to the dwarf2 specification, but data is still
13588 laid out as per normal fortran.
13590 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13591 version checking. */
13593 if (cu->language == language_fortran
13594 && cu->producer && strstr (cu->producer, "GNU F77"))
13596 return DW_ORD_row_major;
13599 switch (cu->language_defn->la_array_ordering)
13601 case array_column_major:
13602 return DW_ORD_col_major;
13603 case array_row_major:
13605 return DW_ORD_row_major;
13609 /* Extract all information from a DW_TAG_set_type DIE and put it in
13610 the DIE's type field. */
13612 static struct type *
13613 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
13615 struct type *domain_type, *set_type;
13616 struct attribute *attr;
13618 domain_type = die_type (die, cu);
13620 /* The die_type call above may have already set the type for this DIE. */
13621 set_type = get_die_type (die, cu);
13625 set_type = create_set_type (NULL, domain_type);
13627 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13629 TYPE_LENGTH (set_type) = DW_UNSND (attr);
13631 return set_die_type (die, set_type, cu);
13634 /* A helper for read_common_block that creates a locexpr baton.
13635 SYM is the symbol which we are marking as computed.
13636 COMMON_DIE is the DIE for the common block.
13637 COMMON_LOC is the location expression attribute for the common
13639 MEMBER_LOC is the location expression attribute for the particular
13640 member of the common block that we are processing.
13641 CU is the CU from which the above come. */
13644 mark_common_block_symbol_computed (struct symbol *sym,
13645 struct die_info *common_die,
13646 struct attribute *common_loc,
13647 struct attribute *member_loc,
13648 struct dwarf2_cu *cu)
13650 struct objfile *objfile = dwarf2_per_objfile->objfile;
13651 struct dwarf2_locexpr_baton *baton;
13653 unsigned int cu_off;
13654 enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile));
13655 LONGEST offset = 0;
13657 gdb_assert (common_loc && member_loc);
13658 gdb_assert (attr_form_is_block (common_loc));
13659 gdb_assert (attr_form_is_block (member_loc)
13660 || attr_form_is_constant (member_loc));
13662 baton = obstack_alloc (&objfile->objfile_obstack,
13663 sizeof (struct dwarf2_locexpr_baton));
13664 baton->per_cu = cu->per_cu;
13665 gdb_assert (baton->per_cu);
13667 baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13669 if (attr_form_is_constant (member_loc))
13671 offset = dwarf2_get_attr_constant_value (member_loc, 0);
13672 baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size;
13675 baton->size += DW_BLOCK (member_loc)->size;
13677 ptr = obstack_alloc (&objfile->objfile_obstack, baton->size);
13680 *ptr++ = DW_OP_call4;
13681 cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off;
13682 store_unsigned_integer (ptr, 4, byte_order, cu_off);
13685 if (attr_form_is_constant (member_loc))
13687 *ptr++ = DW_OP_addr;
13688 store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset);
13689 ptr += cu->header.addr_size;
13693 /* We have to copy the data here, because DW_OP_call4 will only
13694 use a DW_AT_location attribute. */
13695 memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size);
13696 ptr += DW_BLOCK (member_loc)->size;
13699 *ptr++ = DW_OP_plus;
13700 gdb_assert (ptr - baton->data == baton->size);
13702 SYMBOL_LOCATION_BATON (sym) = baton;
13703 SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index;
13706 /* Create appropriate locally-scoped variables for all the
13707 DW_TAG_common_block entries. Also create a struct common_block
13708 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13709 is used to sepate the common blocks name namespace from regular
13713 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
13715 struct attribute *attr;
13717 attr = dwarf2_attr (die, DW_AT_location, cu);
13720 /* Support the .debug_loc offsets. */
13721 if (attr_form_is_block (attr))
13725 else if (attr_form_is_section_offset (attr))
13727 dwarf2_complex_location_expr_complaint ();
13732 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13733 "common block member");
13738 if (die->child != NULL)
13740 struct objfile *objfile = cu->objfile;
13741 struct die_info *child_die;
13742 size_t n_entries = 0, size;
13743 struct common_block *common_block;
13744 struct symbol *sym;
13746 for (child_die = die->child;
13747 child_die && child_die->tag;
13748 child_die = sibling_die (child_die))
13751 size = (sizeof (struct common_block)
13752 + (n_entries - 1) * sizeof (struct symbol *));
13753 common_block = obstack_alloc (&objfile->objfile_obstack, size);
13754 memset (common_block->contents, 0, n_entries * sizeof (struct symbol *));
13755 common_block->n_entries = 0;
13757 for (child_die = die->child;
13758 child_die && child_die->tag;
13759 child_die = sibling_die (child_die))
13761 /* Create the symbol in the DW_TAG_common_block block in the current
13763 sym = new_symbol (child_die, NULL, cu);
13766 struct attribute *member_loc;
13768 common_block->contents[common_block->n_entries++] = sym;
13770 member_loc = dwarf2_attr (child_die, DW_AT_data_member_location,
13774 /* GDB has handled this for a long time, but it is
13775 not specified by DWARF. It seems to have been
13776 emitted by gfortran at least as recently as:
13777 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13778 complaint (&symfile_complaints,
13779 _("Variable in common block has "
13780 "DW_AT_data_member_location "
13781 "- DIE at 0x%x [in module %s]"),
13782 child_die->offset.sect_off,
13783 objfile_name (cu->objfile));
13785 if (attr_form_is_section_offset (member_loc))
13786 dwarf2_complex_location_expr_complaint ();
13787 else if (attr_form_is_constant (member_loc)
13788 || attr_form_is_block (member_loc))
13791 mark_common_block_symbol_computed (sym, die, attr,
13795 dwarf2_complex_location_expr_complaint ();
13800 sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu);
13801 SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block;
13805 /* Create a type for a C++ namespace. */
13807 static struct type *
13808 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
13810 struct objfile *objfile = cu->objfile;
13811 const char *previous_prefix, *name;
13815 /* For extensions, reuse the type of the original namespace. */
13816 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
13818 struct die_info *ext_die;
13819 struct dwarf2_cu *ext_cu = cu;
13821 ext_die = dwarf2_extension (die, &ext_cu);
13822 type = read_type_die (ext_die, ext_cu);
13824 /* EXT_CU may not be the same as CU.
13825 Ensure TYPE is recorded with CU in die_type_hash. */
13826 return set_die_type (die, type, cu);
13829 name = namespace_name (die, &is_anonymous, cu);
13831 /* Now build the name of the current namespace. */
13833 previous_prefix = determine_prefix (die, cu);
13834 if (previous_prefix[0] != '\0')
13835 name = typename_concat (&objfile->objfile_obstack,
13836 previous_prefix, name, 0, cu);
13838 /* Create the type. */
13839 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
13841 TYPE_NAME (type) = name;
13842 TYPE_TAG_NAME (type) = TYPE_NAME (type);
13844 return set_die_type (die, type, cu);
13847 /* Read a C++ namespace. */
13850 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
13852 struct objfile *objfile = cu->objfile;
13855 /* Add a symbol associated to this if we haven't seen the namespace
13856 before. Also, add a using directive if it's an anonymous
13859 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
13863 type = read_type_die (die, cu);
13864 new_symbol (die, type, cu);
13866 namespace_name (die, &is_anonymous, cu);
13869 const char *previous_prefix = determine_prefix (die, cu);
13871 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
13872 NULL, NULL, 0, &objfile->objfile_obstack);
13876 if (die->child != NULL)
13878 struct die_info *child_die = die->child;
13880 while (child_die && child_die->tag)
13882 process_die (child_die, cu);
13883 child_die = sibling_die (child_die);
13888 /* Read a Fortran module as type. This DIE can be only a declaration used for
13889 imported module. Still we need that type as local Fortran "use ... only"
13890 declaration imports depend on the created type in determine_prefix. */
13892 static struct type *
13893 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
13895 struct objfile *objfile = cu->objfile;
13896 const char *module_name;
13899 module_name = dwarf2_name (die, cu);
13901 complaint (&symfile_complaints,
13902 _("DW_TAG_module has no name, offset 0x%x"),
13903 die->offset.sect_off);
13904 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
13906 /* determine_prefix uses TYPE_TAG_NAME. */
13907 TYPE_TAG_NAME (type) = TYPE_NAME (type);
13909 return set_die_type (die, type, cu);
13912 /* Read a Fortran module. */
13915 read_module (struct die_info *die, struct dwarf2_cu *cu)
13917 struct die_info *child_die = die->child;
13920 type = read_type_die (die, cu);
13921 new_symbol (die, type, cu);
13923 while (child_die && child_die->tag)
13925 process_die (child_die, cu);
13926 child_die = sibling_die (child_die);
13930 /* Return the name of the namespace represented by DIE. Set
13931 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
13934 static const char *
13935 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
13937 struct die_info *current_die;
13938 const char *name = NULL;
13940 /* Loop through the extensions until we find a name. */
13942 for (current_die = die;
13943 current_die != NULL;
13944 current_die = dwarf2_extension (die, &cu))
13946 name = dwarf2_name (current_die, cu);
13951 /* Is it an anonymous namespace? */
13953 *is_anonymous = (name == NULL);
13955 name = CP_ANONYMOUS_NAMESPACE_STR;
13960 /* Extract all information from a DW_TAG_pointer_type DIE and add to
13961 the user defined type vector. */
13963 static struct type *
13964 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
13966 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
13967 struct comp_unit_head *cu_header = &cu->header;
13969 struct attribute *attr_byte_size;
13970 struct attribute *attr_address_class;
13971 int byte_size, addr_class;
13972 struct type *target_type;
13974 target_type = die_type (die, cu);
13976 /* The die_type call above may have already set the type for this DIE. */
13977 type = get_die_type (die, cu);
13981 type = lookup_pointer_type (target_type);
13983 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
13984 if (attr_byte_size)
13985 byte_size = DW_UNSND (attr_byte_size);
13987 byte_size = cu_header->addr_size;
13989 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
13990 if (attr_address_class)
13991 addr_class = DW_UNSND (attr_address_class);
13993 addr_class = DW_ADDR_none;
13995 /* If the pointer size or address class is different than the
13996 default, create a type variant marked as such and set the
13997 length accordingly. */
13998 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
14000 if (gdbarch_address_class_type_flags_p (gdbarch))
14004 type_flags = gdbarch_address_class_type_flags
14005 (gdbarch, byte_size, addr_class);
14006 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
14008 type = make_type_with_address_space (type, type_flags);
14010 else if (TYPE_LENGTH (type) != byte_size)
14012 complaint (&symfile_complaints,
14013 _("invalid pointer size %d"), byte_size);
14017 /* Should we also complain about unhandled address classes? */
14021 TYPE_LENGTH (type) = byte_size;
14022 return set_die_type (die, type, cu);
14025 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14026 the user defined type vector. */
14028 static struct type *
14029 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
14032 struct type *to_type;
14033 struct type *domain;
14035 to_type = die_type (die, cu);
14036 domain = die_containing_type (die, cu);
14038 /* The calls above may have already set the type for this DIE. */
14039 type = get_die_type (die, cu);
14043 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
14044 type = lookup_methodptr_type (to_type);
14045 else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC)
14047 struct type *new_type = alloc_type (cu->objfile);
14049 smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type),
14050 TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type),
14051 TYPE_VARARGS (to_type));
14052 type = lookup_methodptr_type (new_type);
14055 type = lookup_memberptr_type (to_type, domain);
14057 return set_die_type (die, type, cu);
14060 /* Extract all information from a DW_TAG_reference_type DIE and add to
14061 the user defined type vector. */
14063 static struct type *
14064 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
14066 struct comp_unit_head *cu_header = &cu->header;
14067 struct type *type, *target_type;
14068 struct attribute *attr;
14070 target_type = die_type (die, cu);
14072 /* The die_type call above may have already set the type for this DIE. */
14073 type = get_die_type (die, cu);
14077 type = lookup_reference_type (target_type);
14078 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
14081 TYPE_LENGTH (type) = DW_UNSND (attr);
14085 TYPE_LENGTH (type) = cu_header->addr_size;
14087 return set_die_type (die, type, cu);
14090 static struct type *
14091 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
14093 struct type *base_type, *cv_type;
14095 base_type = die_type (die, cu);
14097 /* The die_type call above may have already set the type for this DIE. */
14098 cv_type = get_die_type (die, cu);
14102 /* In case the const qualifier is applied to an array type, the element type
14103 is so qualified, not the array type (section 6.7.3 of C99). */
14104 if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY)
14106 struct type *el_type, *inner_array;
14108 base_type = copy_type (base_type);
14109 inner_array = base_type;
14111 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
14113 TYPE_TARGET_TYPE (inner_array) =
14114 copy_type (TYPE_TARGET_TYPE (inner_array));
14115 inner_array = TYPE_TARGET_TYPE (inner_array);
14118 el_type = TYPE_TARGET_TYPE (inner_array);
14119 TYPE_TARGET_TYPE (inner_array) =
14120 make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL);
14122 return set_die_type (die, base_type, cu);
14125 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
14126 return set_die_type (die, cv_type, cu);
14129 static struct type *
14130 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
14132 struct type *base_type, *cv_type;
14134 base_type = die_type (die, cu);
14136 /* The die_type call above may have already set the type for this DIE. */
14137 cv_type = get_die_type (die, cu);
14141 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
14142 return set_die_type (die, cv_type, cu);
14145 /* Handle DW_TAG_restrict_type. */
14147 static struct type *
14148 read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu)
14150 struct type *base_type, *cv_type;
14152 base_type = die_type (die, cu);
14154 /* The die_type call above may have already set the type for this DIE. */
14155 cv_type = get_die_type (die, cu);
14159 cv_type = make_restrict_type (base_type);
14160 return set_die_type (die, cv_type, cu);
14163 /* Extract all information from a DW_TAG_string_type DIE and add to
14164 the user defined type vector. It isn't really a user defined type,
14165 but it behaves like one, with other DIE's using an AT_user_def_type
14166 attribute to reference it. */
14168 static struct type *
14169 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
14171 struct objfile *objfile = cu->objfile;
14172 struct gdbarch *gdbarch = get_objfile_arch (objfile);
14173 struct type *type, *range_type, *index_type, *char_type;
14174 struct attribute *attr;
14175 unsigned int length;
14177 attr = dwarf2_attr (die, DW_AT_string_length, cu);
14180 length = DW_UNSND (attr);
14184 /* Check for the DW_AT_byte_size attribute. */
14185 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
14188 length = DW_UNSND (attr);
14196 index_type = objfile_type (objfile)->builtin_int;
14197 range_type = create_static_range_type (NULL, index_type, 1, length);
14198 char_type = language_string_char_type (cu->language_defn, gdbarch);
14199 type = create_string_type (NULL, char_type, range_type);
14201 return set_die_type (die, type, cu);
14204 /* Assuming that DIE corresponds to a function, returns nonzero
14205 if the function is prototyped. */
14208 prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu)
14210 struct attribute *attr;
14212 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
14213 if (attr && (DW_UNSND (attr) != 0))
14216 /* The DWARF standard implies that the DW_AT_prototyped attribute
14217 is only meaninful for C, but the concept also extends to other
14218 languages that allow unprototyped functions (Eg: Objective C).
14219 For all other languages, assume that functions are always
14221 if (cu->language != language_c
14222 && cu->language != language_objc
14223 && cu->language != language_opencl)
14226 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14227 prototyped and unprototyped functions; default to prototyped,
14228 since that is more common in modern code (and RealView warns
14229 about unprototyped functions). */
14230 if (producer_is_realview (cu->producer))
14236 /* Handle DIES due to C code like:
14240 int (*funcp)(int a, long l);
14244 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14246 static struct type *
14247 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
14249 struct objfile *objfile = cu->objfile;
14250 struct type *type; /* Type that this function returns. */
14251 struct type *ftype; /* Function that returns above type. */
14252 struct attribute *attr;
14254 type = die_type (die, cu);
14256 /* The die_type call above may have already set the type for this DIE. */
14257 ftype = get_die_type (die, cu);
14261 ftype = lookup_function_type (type);
14263 if (prototyped_function_p (die, cu))
14264 TYPE_PROTOTYPED (ftype) = 1;
14266 /* Store the calling convention in the type if it's available in
14267 the subroutine die. Otherwise set the calling convention to
14268 the default value DW_CC_normal. */
14269 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
14271 TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr);
14272 else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL"))
14273 TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL;
14275 TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal;
14277 /* We need to add the subroutine type to the die immediately so
14278 we don't infinitely recurse when dealing with parameters
14279 declared as the same subroutine type. */
14280 set_die_type (die, ftype, cu);
14282 if (die->child != NULL)
14284 struct type *void_type = objfile_type (objfile)->builtin_void;
14285 struct die_info *child_die;
14286 int nparams, iparams;
14288 /* Count the number of parameters.
14289 FIXME: GDB currently ignores vararg functions, but knows about
14290 vararg member functions. */
14292 child_die = die->child;
14293 while (child_die && child_die->tag)
14295 if (child_die->tag == DW_TAG_formal_parameter)
14297 else if (child_die->tag == DW_TAG_unspecified_parameters)
14298 TYPE_VARARGS (ftype) = 1;
14299 child_die = sibling_die (child_die);
14302 /* Allocate storage for parameters and fill them in. */
14303 TYPE_NFIELDS (ftype) = nparams;
14304 TYPE_FIELDS (ftype) = (struct field *)
14305 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
14307 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14308 even if we error out during the parameters reading below. */
14309 for (iparams = 0; iparams < nparams; iparams++)
14310 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
14313 child_die = die->child;
14314 while (child_die && child_die->tag)
14316 if (child_die->tag == DW_TAG_formal_parameter)
14318 struct type *arg_type;
14320 /* DWARF version 2 has no clean way to discern C++
14321 static and non-static member functions. G++ helps
14322 GDB by marking the first parameter for non-static
14323 member functions (which is the this pointer) as
14324 artificial. We pass this information to
14325 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14327 DWARF version 3 added DW_AT_object_pointer, which GCC
14328 4.5 does not yet generate. */
14329 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
14331 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
14334 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
14336 /* GCC/43521: In java, the formal parameter
14337 "this" is sometimes not marked with DW_AT_artificial. */
14338 if (cu->language == language_java)
14340 const char *name = dwarf2_name (child_die, cu);
14342 if (name && !strcmp (name, "this"))
14343 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
14346 arg_type = die_type (child_die, cu);
14348 /* RealView does not mark THIS as const, which the testsuite
14349 expects. GCC marks THIS as const in method definitions,
14350 but not in the class specifications (GCC PR 43053). */
14351 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
14352 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
14355 struct dwarf2_cu *arg_cu = cu;
14356 const char *name = dwarf2_name (child_die, cu);
14358 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
14361 /* If the compiler emits this, use it. */
14362 if (follow_die_ref (die, attr, &arg_cu) == child_die)
14365 else if (name && strcmp (name, "this") == 0)
14366 /* Function definitions will have the argument names. */
14368 else if (name == NULL && iparams == 0)
14369 /* Declarations may not have the names, so like
14370 elsewhere in GDB, assume an artificial first
14371 argument is "this". */
14375 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
14379 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
14382 child_die = sibling_die (child_die);
14389 static struct type *
14390 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
14392 struct objfile *objfile = cu->objfile;
14393 const char *name = NULL;
14394 struct type *this_type, *target_type;
14396 name = dwarf2_full_name (NULL, die, cu);
14397 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
14398 TYPE_FLAG_TARGET_STUB, NULL, objfile);
14399 TYPE_NAME (this_type) = name;
14400 set_die_type (die, this_type, cu);
14401 target_type = die_type (die, cu);
14402 if (target_type != this_type)
14403 TYPE_TARGET_TYPE (this_type) = target_type;
14406 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14407 spec and cause infinite loops in GDB. */
14408 complaint (&symfile_complaints,
14409 _("Self-referential DW_TAG_typedef "
14410 "- DIE at 0x%x [in module %s]"),
14411 die->offset.sect_off, objfile_name (objfile));
14412 TYPE_TARGET_TYPE (this_type) = NULL;
14417 /* Find a representation of a given base type and install
14418 it in the TYPE field of the die. */
14420 static struct type *
14421 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
14423 struct objfile *objfile = cu->objfile;
14425 struct attribute *attr;
14426 int encoding = 0, size = 0;
14428 enum type_code code = TYPE_CODE_INT;
14429 int type_flags = 0;
14430 struct type *target_type = NULL;
14432 attr = dwarf2_attr (die, DW_AT_encoding, cu);
14435 encoding = DW_UNSND (attr);
14437 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
14440 size = DW_UNSND (attr);
14442 name = dwarf2_name (die, cu);
14445 complaint (&symfile_complaints,
14446 _("DW_AT_name missing from DW_TAG_base_type"));
14451 case DW_ATE_address:
14452 /* Turn DW_ATE_address into a void * pointer. */
14453 code = TYPE_CODE_PTR;
14454 type_flags |= TYPE_FLAG_UNSIGNED;
14455 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
14457 case DW_ATE_boolean:
14458 code = TYPE_CODE_BOOL;
14459 type_flags |= TYPE_FLAG_UNSIGNED;
14461 case DW_ATE_complex_float:
14462 code = TYPE_CODE_COMPLEX;
14463 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
14465 case DW_ATE_decimal_float:
14466 code = TYPE_CODE_DECFLOAT;
14469 code = TYPE_CODE_FLT;
14471 case DW_ATE_signed:
14473 case DW_ATE_unsigned:
14474 type_flags |= TYPE_FLAG_UNSIGNED;
14475 if (cu->language == language_fortran
14477 && strncmp (name, "character(", sizeof ("character(") - 1) == 0)
14478 code = TYPE_CODE_CHAR;
14480 case DW_ATE_signed_char:
14481 if (cu->language == language_ada || cu->language == language_m2
14482 || cu->language == language_pascal
14483 || cu->language == language_fortran)
14484 code = TYPE_CODE_CHAR;
14486 case DW_ATE_unsigned_char:
14487 if (cu->language == language_ada || cu->language == language_m2
14488 || cu->language == language_pascal
14489 || cu->language == language_fortran)
14490 code = TYPE_CODE_CHAR;
14491 type_flags |= TYPE_FLAG_UNSIGNED;
14494 /* We just treat this as an integer and then recognize the
14495 type by name elsewhere. */
14499 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
14500 dwarf_type_encoding_name (encoding));
14504 type = init_type (code, size, type_flags, NULL, objfile);
14505 TYPE_NAME (type) = name;
14506 TYPE_TARGET_TYPE (type) = target_type;
14508 if (name && strcmp (name, "char") == 0)
14509 TYPE_NOSIGN (type) = 1;
14511 return set_die_type (die, type, cu);
14514 /* Parse dwarf attribute if it's a block, reference or constant and put the
14515 resulting value of the attribute into struct bound_prop.
14516 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14519 attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die,
14520 struct dwarf2_cu *cu, struct dynamic_prop *prop)
14522 struct dwarf2_property_baton *baton;
14523 struct obstack *obstack = &cu->objfile->objfile_obstack;
14525 if (attr == NULL || prop == NULL)
14528 if (attr_form_is_block (attr))
14530 baton = obstack_alloc (obstack, sizeof (*baton));
14531 baton->referenced_type = NULL;
14532 baton->locexpr.per_cu = cu->per_cu;
14533 baton->locexpr.size = DW_BLOCK (attr)->size;
14534 baton->locexpr.data = DW_BLOCK (attr)->data;
14535 prop->data.baton = baton;
14536 prop->kind = PROP_LOCEXPR;
14537 gdb_assert (prop->data.baton != NULL);
14539 else if (attr_form_is_ref (attr))
14541 struct dwarf2_cu *target_cu = cu;
14542 struct die_info *target_die;
14543 struct attribute *target_attr;
14545 target_die = follow_die_ref (die, attr, &target_cu);
14546 target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu);
14547 if (target_attr == NULL)
14550 if (attr_form_is_section_offset (target_attr))
14552 baton = obstack_alloc (obstack, sizeof (*baton));
14553 baton->referenced_type = die_type (target_die, target_cu);
14554 fill_in_loclist_baton (cu, &baton->loclist, target_attr);
14555 prop->data.baton = baton;
14556 prop->kind = PROP_LOCLIST;
14557 gdb_assert (prop->data.baton != NULL);
14559 else if (attr_form_is_block (target_attr))
14561 baton = obstack_alloc (obstack, sizeof (*baton));
14562 baton->referenced_type = die_type (target_die, target_cu);
14563 baton->locexpr.per_cu = cu->per_cu;
14564 baton->locexpr.size = DW_BLOCK (target_attr)->size;
14565 baton->locexpr.data = DW_BLOCK (target_attr)->data;
14566 prop->data.baton = baton;
14567 prop->kind = PROP_LOCEXPR;
14568 gdb_assert (prop->data.baton != NULL);
14572 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14573 "dynamic property");
14577 else if (attr_form_is_constant (attr))
14579 prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0);
14580 prop->kind = PROP_CONST;
14584 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form),
14585 dwarf2_name (die, cu));
14592 /* Read the given DW_AT_subrange DIE. */
14594 static struct type *
14595 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
14597 struct type *base_type, *orig_base_type;
14598 struct type *range_type;
14599 struct attribute *attr;
14600 struct dynamic_prop low, high;
14601 int low_default_is_valid;
14602 int high_bound_is_count = 0;
14604 LONGEST negative_mask;
14606 orig_base_type = die_type (die, cu);
14607 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14608 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14609 creating the range type, but we use the result of check_typedef
14610 when examining properties of the type. */
14611 base_type = check_typedef (orig_base_type);
14613 /* The die_type call above may have already set the type for this DIE. */
14614 range_type = get_die_type (die, cu);
14618 low.kind = PROP_CONST;
14619 high.kind = PROP_CONST;
14620 high.data.const_val = 0;
14622 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14623 omitting DW_AT_lower_bound. */
14624 switch (cu->language)
14627 case language_cplus:
14628 low.data.const_val = 0;
14629 low_default_is_valid = 1;
14631 case language_fortran:
14632 low.data.const_val = 1;
14633 low_default_is_valid = 1;
14636 case language_java:
14637 case language_objc:
14638 low.data.const_val = 0;
14639 low_default_is_valid = (cu->header.version >= 4);
14643 case language_pascal:
14644 low.data.const_val = 1;
14645 low_default_is_valid = (cu->header.version >= 4);
14648 low.data.const_val = 0;
14649 low_default_is_valid = 0;
14653 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
14655 attr_to_dynamic_prop (attr, die, cu, &low);
14656 else if (!low_default_is_valid)
14657 complaint (&symfile_complaints, _("Missing DW_AT_lower_bound "
14658 "- DIE at 0x%x [in module %s]"),
14659 die->offset.sect_off, objfile_name (cu->objfile));
14661 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
14662 if (!attr_to_dynamic_prop (attr, die, cu, &high))
14664 attr = dwarf2_attr (die, DW_AT_count, cu);
14665 if (attr_to_dynamic_prop (attr, die, cu, &high))
14667 /* If bounds are constant do the final calculation here. */
14668 if (low.kind == PROP_CONST && high.kind == PROP_CONST)
14669 high.data.const_val = low.data.const_val + high.data.const_val - 1;
14671 high_bound_is_count = 1;
14675 /* Dwarf-2 specifications explicitly allows to create subrange types
14676 without specifying a base type.
14677 In that case, the base type must be set to the type of
14678 the lower bound, upper bound or count, in that order, if any of these
14679 three attributes references an object that has a type.
14680 If no base type is found, the Dwarf-2 specifications say that
14681 a signed integer type of size equal to the size of an address should
14683 For the following C code: `extern char gdb_int [];'
14684 GCC produces an empty range DIE.
14685 FIXME: muller/2010-05-28: Possible references to object for low bound,
14686 high bound or count are not yet handled by this code. */
14687 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
14689 struct objfile *objfile = cu->objfile;
14690 struct gdbarch *gdbarch = get_objfile_arch (objfile);
14691 int addr_size = gdbarch_addr_bit (gdbarch) /8;
14692 struct type *int_type = objfile_type (objfile)->builtin_int;
14694 /* Test "int", "long int", and "long long int" objfile types,
14695 and select the first one having a size above or equal to the
14696 architecture address size. */
14697 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
14698 base_type = int_type;
14701 int_type = objfile_type (objfile)->builtin_long;
14702 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
14703 base_type = int_type;
14706 int_type = objfile_type (objfile)->builtin_long_long;
14707 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
14708 base_type = int_type;
14713 /* Normally, the DWARF producers are expected to use a signed
14714 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14715 But this is unfortunately not always the case, as witnessed
14716 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14717 is used instead. To work around that ambiguity, we treat
14718 the bounds as signed, and thus sign-extend their values, when
14719 the base type is signed. */
14721 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
14722 if (low.kind == PROP_CONST
14723 && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask))
14724 low.data.const_val |= negative_mask;
14725 if (high.kind == PROP_CONST
14726 && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask))
14727 high.data.const_val |= negative_mask;
14729 range_type = create_range_type (NULL, orig_base_type, &low, &high);
14731 if (high_bound_is_count)
14732 TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1;
14734 /* Ada expects an empty array on no boundary attributes. */
14735 if (attr == NULL && cu->language != language_ada)
14736 TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED;
14738 name = dwarf2_name (die, cu);
14740 TYPE_NAME (range_type) = name;
14742 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
14744 TYPE_LENGTH (range_type) = DW_UNSND (attr);
14746 set_die_type (die, range_type, cu);
14748 /* set_die_type should be already done. */
14749 set_descriptive_type (range_type, die, cu);
14754 static struct type *
14755 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
14759 /* For now, we only support the C meaning of an unspecified type: void. */
14761 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
14762 TYPE_NAME (type) = dwarf2_name (die, cu);
14764 return set_die_type (die, type, cu);
14767 /* Read a single die and all its descendents. Set the die's sibling
14768 field to NULL; set other fields in the die correctly, and set all
14769 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
14770 location of the info_ptr after reading all of those dies. PARENT
14771 is the parent of the die in question. */
14773 static struct die_info *
14774 read_die_and_children (const struct die_reader_specs *reader,
14775 const gdb_byte *info_ptr,
14776 const gdb_byte **new_info_ptr,
14777 struct die_info *parent)
14779 struct die_info *die;
14780 const gdb_byte *cur_ptr;
14783 cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0);
14786 *new_info_ptr = cur_ptr;
14789 store_in_ref_table (die, reader->cu);
14792 die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die);
14796 *new_info_ptr = cur_ptr;
14799 die->sibling = NULL;
14800 die->parent = parent;
14804 /* Read a die, all of its descendents, and all of its siblings; set
14805 all of the fields of all of the dies correctly. Arguments are as
14806 in read_die_and_children. */
14808 static struct die_info *
14809 read_die_and_siblings_1 (const struct die_reader_specs *reader,
14810 const gdb_byte *info_ptr,
14811 const gdb_byte **new_info_ptr,
14812 struct die_info *parent)
14814 struct die_info *first_die, *last_sibling;
14815 const gdb_byte *cur_ptr;
14817 cur_ptr = info_ptr;
14818 first_die = last_sibling = NULL;
14822 struct die_info *die
14823 = read_die_and_children (reader, cur_ptr, &cur_ptr, parent);
14827 *new_info_ptr = cur_ptr;
14834 last_sibling->sibling = die;
14836 last_sibling = die;
14840 /* Read a die, all of its descendents, and all of its siblings; set
14841 all of the fields of all of the dies correctly. Arguments are as
14842 in read_die_and_children.
14843 This the main entry point for reading a DIE and all its children. */
14845 static struct die_info *
14846 read_die_and_siblings (const struct die_reader_specs *reader,
14847 const gdb_byte *info_ptr,
14848 const gdb_byte **new_info_ptr,
14849 struct die_info *parent)
14851 struct die_info *die = read_die_and_siblings_1 (reader, info_ptr,
14852 new_info_ptr, parent);
14854 if (dwarf2_die_debug)
14856 fprintf_unfiltered (gdb_stdlog,
14857 "Read die from %s@0x%x of %s:\n",
14858 get_section_name (reader->die_section),
14859 (unsigned) (info_ptr - reader->die_section->buffer),
14860 bfd_get_filename (reader->abfd));
14861 dump_die (die, dwarf2_die_debug);
14867 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
14869 The caller is responsible for filling in the extra attributes
14870 and updating (*DIEP)->num_attrs.
14871 Set DIEP to point to a newly allocated die with its information,
14872 except for its child, sibling, and parent fields.
14873 Set HAS_CHILDREN to tell whether the die has children or not. */
14875 static const gdb_byte *
14876 read_full_die_1 (const struct die_reader_specs *reader,
14877 struct die_info **diep, const gdb_byte *info_ptr,
14878 int *has_children, int num_extra_attrs)
14880 unsigned int abbrev_number, bytes_read, i;
14881 sect_offset offset;
14882 struct abbrev_info *abbrev;
14883 struct die_info *die;
14884 struct dwarf2_cu *cu = reader->cu;
14885 bfd *abfd = reader->abfd;
14887 offset.sect_off = info_ptr - reader->buffer;
14888 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14889 info_ptr += bytes_read;
14890 if (!abbrev_number)
14897 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
14899 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
14901 bfd_get_filename (abfd));
14903 die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs);
14904 die->offset = offset;
14905 die->tag = abbrev->tag;
14906 die->abbrev = abbrev_number;
14908 /* Make the result usable.
14909 The caller needs to update num_attrs after adding the extra
14911 die->num_attrs = abbrev->num_attrs;
14913 for (i = 0; i < abbrev->num_attrs; ++i)
14914 info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i],
14918 *has_children = abbrev->has_children;
14922 /* Read a die and all its attributes.
14923 Set DIEP to point to a newly allocated die with its information,
14924 except for its child, sibling, and parent fields.
14925 Set HAS_CHILDREN to tell whether the die has children or not. */
14927 static const gdb_byte *
14928 read_full_die (const struct die_reader_specs *reader,
14929 struct die_info **diep, const gdb_byte *info_ptr,
14932 const gdb_byte *result;
14934 result = read_full_die_1 (reader, diep, info_ptr, has_children, 0);
14936 if (dwarf2_die_debug)
14938 fprintf_unfiltered (gdb_stdlog,
14939 "Read die from %s@0x%x of %s:\n",
14940 get_section_name (reader->die_section),
14941 (unsigned) (info_ptr - reader->die_section->buffer),
14942 bfd_get_filename (reader->abfd));
14943 dump_die (*diep, dwarf2_die_debug);
14949 /* Abbreviation tables.
14951 In DWARF version 2, the description of the debugging information is
14952 stored in a separate .debug_abbrev section. Before we read any
14953 dies from a section we read in all abbreviations and install them
14954 in a hash table. */
14956 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
14958 static struct abbrev_info *
14959 abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table)
14961 struct abbrev_info *abbrev;
14963 abbrev = (struct abbrev_info *)
14964 obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info));
14965 memset (abbrev, 0, sizeof (struct abbrev_info));
14969 /* Add an abbreviation to the table. */
14972 abbrev_table_add_abbrev (struct abbrev_table *abbrev_table,
14973 unsigned int abbrev_number,
14974 struct abbrev_info *abbrev)
14976 unsigned int hash_number;
14978 hash_number = abbrev_number % ABBREV_HASH_SIZE;
14979 abbrev->next = abbrev_table->abbrevs[hash_number];
14980 abbrev_table->abbrevs[hash_number] = abbrev;
14983 /* Look up an abbrev in the table.
14984 Returns NULL if the abbrev is not found. */
14986 static struct abbrev_info *
14987 abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table,
14988 unsigned int abbrev_number)
14990 unsigned int hash_number;
14991 struct abbrev_info *abbrev;
14993 hash_number = abbrev_number % ABBREV_HASH_SIZE;
14994 abbrev = abbrev_table->abbrevs[hash_number];
14998 if (abbrev->number == abbrev_number)
15000 abbrev = abbrev->next;
15005 /* Read in an abbrev table. */
15007 static struct abbrev_table *
15008 abbrev_table_read_table (struct dwarf2_section_info *section,
15009 sect_offset offset)
15011 struct objfile *objfile = dwarf2_per_objfile->objfile;
15012 bfd *abfd = get_section_bfd_owner (section);
15013 struct abbrev_table *abbrev_table;
15014 const gdb_byte *abbrev_ptr;
15015 struct abbrev_info *cur_abbrev;
15016 unsigned int abbrev_number, bytes_read, abbrev_name;
15017 unsigned int abbrev_form;
15018 struct attr_abbrev *cur_attrs;
15019 unsigned int allocated_attrs;
15021 abbrev_table = XNEW (struct abbrev_table);
15022 abbrev_table->offset = offset;
15023 obstack_init (&abbrev_table->abbrev_obstack);
15024 abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack,
15026 * sizeof (struct abbrev_info *)));
15027 memset (abbrev_table->abbrevs, 0,
15028 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
15030 dwarf2_read_section (objfile, section);
15031 abbrev_ptr = section->buffer + offset.sect_off;
15032 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
15033 abbrev_ptr += bytes_read;
15035 allocated_attrs = ATTR_ALLOC_CHUNK;
15036 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
15038 /* Loop until we reach an abbrev number of 0. */
15039 while (abbrev_number)
15041 cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table);
15043 /* read in abbrev header */
15044 cur_abbrev->number = abbrev_number;
15045 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
15046 abbrev_ptr += bytes_read;
15047 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
15050 /* now read in declarations */
15051 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
15052 abbrev_ptr += bytes_read;
15053 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
15054 abbrev_ptr += bytes_read;
15055 while (abbrev_name)
15057 if (cur_abbrev->num_attrs == allocated_attrs)
15059 allocated_attrs += ATTR_ALLOC_CHUNK;
15061 = xrealloc (cur_attrs, (allocated_attrs
15062 * sizeof (struct attr_abbrev)));
15065 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
15066 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
15067 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
15068 abbrev_ptr += bytes_read;
15069 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
15070 abbrev_ptr += bytes_read;
15073 cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack,
15074 (cur_abbrev->num_attrs
15075 * sizeof (struct attr_abbrev)));
15076 memcpy (cur_abbrev->attrs, cur_attrs,
15077 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
15079 abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev);
15081 /* Get next abbreviation.
15082 Under Irix6 the abbreviations for a compilation unit are not
15083 always properly terminated with an abbrev number of 0.
15084 Exit loop if we encounter an abbreviation which we have
15085 already read (which means we are about to read the abbreviations
15086 for the next compile unit) or if the end of the abbreviation
15087 table is reached. */
15088 if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size)
15090 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
15091 abbrev_ptr += bytes_read;
15092 if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL)
15097 return abbrev_table;
15100 /* Free the resources held by ABBREV_TABLE. */
15103 abbrev_table_free (struct abbrev_table *abbrev_table)
15105 obstack_free (&abbrev_table->abbrev_obstack, NULL);
15106 xfree (abbrev_table);
15109 /* Same as abbrev_table_free but as a cleanup.
15110 We pass in a pointer to the pointer to the table so that we can
15111 set the pointer to NULL when we're done. It also simplifies
15112 build_type_psymtabs_1. */
15115 abbrev_table_free_cleanup (void *table_ptr)
15117 struct abbrev_table **abbrev_table_ptr = table_ptr;
15119 if (*abbrev_table_ptr != NULL)
15120 abbrev_table_free (*abbrev_table_ptr);
15121 *abbrev_table_ptr = NULL;
15124 /* Read the abbrev table for CU from ABBREV_SECTION. */
15127 dwarf2_read_abbrevs (struct dwarf2_cu *cu,
15128 struct dwarf2_section_info *abbrev_section)
15131 abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset);
15134 /* Release the memory used by the abbrev table for a compilation unit. */
15137 dwarf2_free_abbrev_table (void *ptr_to_cu)
15139 struct dwarf2_cu *cu = ptr_to_cu;
15141 if (cu->abbrev_table != NULL)
15142 abbrev_table_free (cu->abbrev_table);
15143 /* Set this to NULL so that we SEGV if we try to read it later,
15144 and also because free_comp_unit verifies this is NULL. */
15145 cu->abbrev_table = NULL;
15148 /* Returns nonzero if TAG represents a type that we might generate a partial
15152 is_type_tag_for_partial (int tag)
15157 /* Some types that would be reasonable to generate partial symbols for,
15158 that we don't at present. */
15159 case DW_TAG_array_type:
15160 case DW_TAG_file_type:
15161 case DW_TAG_ptr_to_member_type:
15162 case DW_TAG_set_type:
15163 case DW_TAG_string_type:
15164 case DW_TAG_subroutine_type:
15166 case DW_TAG_base_type:
15167 case DW_TAG_class_type:
15168 case DW_TAG_interface_type:
15169 case DW_TAG_enumeration_type:
15170 case DW_TAG_structure_type:
15171 case DW_TAG_subrange_type:
15172 case DW_TAG_typedef:
15173 case DW_TAG_union_type:
15180 /* Load all DIEs that are interesting for partial symbols into memory. */
15182 static struct partial_die_info *
15183 load_partial_dies (const struct die_reader_specs *reader,
15184 const gdb_byte *info_ptr, int building_psymtab)
15186 struct dwarf2_cu *cu = reader->cu;
15187 struct objfile *objfile = cu->objfile;
15188 struct partial_die_info *part_die;
15189 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
15190 struct abbrev_info *abbrev;
15191 unsigned int bytes_read;
15192 unsigned int load_all = 0;
15193 int nesting_level = 1;
15198 gdb_assert (cu->per_cu != NULL);
15199 if (cu->per_cu->load_all_dies)
15203 = htab_create_alloc_ex (cu->header.length / 12,
15207 &cu->comp_unit_obstack,
15208 hashtab_obstack_allocate,
15209 dummy_obstack_deallocate);
15211 part_die = obstack_alloc (&cu->comp_unit_obstack,
15212 sizeof (struct partial_die_info));
15216 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
15218 /* A NULL abbrev means the end of a series of children. */
15219 if (abbrev == NULL)
15221 if (--nesting_level == 0)
15223 /* PART_DIE was probably the last thing allocated on the
15224 comp_unit_obstack, so we could call obstack_free
15225 here. We don't do that because the waste is small,
15226 and will be cleaned up when we're done with this
15227 compilation unit. This way, we're also more robust
15228 against other users of the comp_unit_obstack. */
15231 info_ptr += bytes_read;
15232 last_die = parent_die;
15233 parent_die = parent_die->die_parent;
15237 /* Check for template arguments. We never save these; if
15238 they're seen, we just mark the parent, and go on our way. */
15239 if (parent_die != NULL
15240 && cu->language == language_cplus
15241 && (abbrev->tag == DW_TAG_template_type_param
15242 || abbrev->tag == DW_TAG_template_value_param))
15244 parent_die->has_template_arguments = 1;
15248 /* We don't need a partial DIE for the template argument. */
15249 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
15254 /* We only recurse into c++ subprograms looking for template arguments.
15255 Skip their other children. */
15257 && cu->language == language_cplus
15258 && parent_die != NULL
15259 && parent_die->tag == DW_TAG_subprogram)
15261 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
15265 /* Check whether this DIE is interesting enough to save. Normally
15266 we would not be interested in members here, but there may be
15267 later variables referencing them via DW_AT_specification (for
15268 static members). */
15270 && !is_type_tag_for_partial (abbrev->tag)
15271 && abbrev->tag != DW_TAG_constant
15272 && abbrev->tag != DW_TAG_enumerator
15273 && abbrev->tag != DW_TAG_subprogram
15274 && abbrev->tag != DW_TAG_lexical_block
15275 && abbrev->tag != DW_TAG_variable
15276 && abbrev->tag != DW_TAG_namespace
15277 && abbrev->tag != DW_TAG_module
15278 && abbrev->tag != DW_TAG_member
15279 && abbrev->tag != DW_TAG_imported_unit
15280 && abbrev->tag != DW_TAG_imported_declaration)
15282 /* Otherwise we skip to the next sibling, if any. */
15283 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
15287 info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read,
15290 /* This two-pass algorithm for processing partial symbols has a
15291 high cost in cache pressure. Thus, handle some simple cases
15292 here which cover the majority of C partial symbols. DIEs
15293 which neither have specification tags in them, nor could have
15294 specification tags elsewhere pointing at them, can simply be
15295 processed and discarded.
15297 This segment is also optional; scan_partial_symbols and
15298 add_partial_symbol will handle these DIEs if we chain
15299 them in normally. When compilers which do not emit large
15300 quantities of duplicate debug information are more common,
15301 this code can probably be removed. */
15303 /* Any complete simple types at the top level (pretty much all
15304 of them, for a language without namespaces), can be processed
15306 if (parent_die == NULL
15307 && part_die->has_specification == 0
15308 && part_die->is_declaration == 0
15309 && ((part_die->tag == DW_TAG_typedef && !part_die->has_children)
15310 || part_die->tag == DW_TAG_base_type
15311 || part_die->tag == DW_TAG_subrange_type))
15313 if (building_psymtab && part_die->name != NULL)
15314 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
15315 VAR_DOMAIN, LOC_TYPEDEF,
15316 &objfile->static_psymbols,
15317 0, (CORE_ADDR) 0, cu->language, objfile);
15318 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
15322 /* The exception for DW_TAG_typedef with has_children above is
15323 a workaround of GCC PR debug/47510. In the case of this complaint
15324 type_name_no_tag_or_error will error on such types later.
15326 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15327 it could not find the child DIEs referenced later, this is checked
15328 above. In correct DWARF DW_TAG_typedef should have no children. */
15330 if (part_die->tag == DW_TAG_typedef && part_die->has_children)
15331 complaint (&symfile_complaints,
15332 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15333 "- DIE at 0x%x [in module %s]"),
15334 part_die->offset.sect_off, objfile_name (objfile));
15336 /* If we're at the second level, and we're an enumerator, and
15337 our parent has no specification (meaning possibly lives in a
15338 namespace elsewhere), then we can add the partial symbol now
15339 instead of queueing it. */
15340 if (part_die->tag == DW_TAG_enumerator
15341 && parent_die != NULL
15342 && parent_die->die_parent == NULL
15343 && parent_die->tag == DW_TAG_enumeration_type
15344 && parent_die->has_specification == 0)
15346 if (part_die->name == NULL)
15347 complaint (&symfile_complaints,
15348 _("malformed enumerator DIE ignored"));
15349 else if (building_psymtab)
15350 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
15351 VAR_DOMAIN, LOC_CONST,
15352 (cu->language == language_cplus
15353 || cu->language == language_java)
15354 ? &objfile->global_psymbols
15355 : &objfile->static_psymbols,
15356 0, (CORE_ADDR) 0, cu->language, objfile);
15358 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
15362 /* We'll save this DIE so link it in. */
15363 part_die->die_parent = parent_die;
15364 part_die->die_sibling = NULL;
15365 part_die->die_child = NULL;
15367 if (last_die && last_die == parent_die)
15368 last_die->die_child = part_die;
15370 last_die->die_sibling = part_die;
15372 last_die = part_die;
15374 if (first_die == NULL)
15375 first_die = part_die;
15377 /* Maybe add the DIE to the hash table. Not all DIEs that we
15378 find interesting need to be in the hash table, because we
15379 also have the parent/sibling/child chains; only those that we
15380 might refer to by offset later during partial symbol reading.
15382 For now this means things that might have be the target of a
15383 DW_AT_specification, DW_AT_abstract_origin, or
15384 DW_AT_extension. DW_AT_extension will refer only to
15385 namespaces; DW_AT_abstract_origin refers to functions (and
15386 many things under the function DIE, but we do not recurse
15387 into function DIEs during partial symbol reading) and
15388 possibly variables as well; DW_AT_specification refers to
15389 declarations. Declarations ought to have the DW_AT_declaration
15390 flag. It happens that GCC forgets to put it in sometimes, but
15391 only for functions, not for types.
15393 Adding more things than necessary to the hash table is harmless
15394 except for the performance cost. Adding too few will result in
15395 wasted time in find_partial_die, when we reread the compilation
15396 unit with load_all_dies set. */
15399 || abbrev->tag == DW_TAG_constant
15400 || abbrev->tag == DW_TAG_subprogram
15401 || abbrev->tag == DW_TAG_variable
15402 || abbrev->tag == DW_TAG_namespace
15403 || part_die->is_declaration)
15407 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
15408 part_die->offset.sect_off, INSERT);
15412 part_die = obstack_alloc (&cu->comp_unit_obstack,
15413 sizeof (struct partial_die_info));
15415 /* For some DIEs we want to follow their children (if any). For C
15416 we have no reason to follow the children of structures; for other
15417 languages we have to, so that we can get at method physnames
15418 to infer fully qualified class names, for DW_AT_specification,
15419 and for C++ template arguments. For C++, we also look one level
15420 inside functions to find template arguments (if the name of the
15421 function does not already contain the template arguments).
15423 For Ada, we need to scan the children of subprograms and lexical
15424 blocks as well because Ada allows the definition of nested
15425 entities that could be interesting for the debugger, such as
15426 nested subprograms for instance. */
15427 if (last_die->has_children
15429 || last_die->tag == DW_TAG_namespace
15430 || last_die->tag == DW_TAG_module
15431 || last_die->tag == DW_TAG_enumeration_type
15432 || (cu->language == language_cplus
15433 && last_die->tag == DW_TAG_subprogram
15434 && (last_die->name == NULL
15435 || strchr (last_die->name, '<') == NULL))
15436 || (cu->language != language_c
15437 && (last_die->tag == DW_TAG_class_type
15438 || last_die->tag == DW_TAG_interface_type
15439 || last_die->tag == DW_TAG_structure_type
15440 || last_die->tag == DW_TAG_union_type))
15441 || (cu->language == language_ada
15442 && (last_die->tag == DW_TAG_subprogram
15443 || last_die->tag == DW_TAG_lexical_block))))
15446 parent_die = last_die;
15450 /* Otherwise we skip to the next sibling, if any. */
15451 info_ptr = locate_pdi_sibling (reader, last_die, info_ptr);
15453 /* Back to the top, do it again. */
15457 /* Read a minimal amount of information into the minimal die structure. */
15459 static const gdb_byte *
15460 read_partial_die (const struct die_reader_specs *reader,
15461 struct partial_die_info *part_die,
15462 struct abbrev_info *abbrev, unsigned int abbrev_len,
15463 const gdb_byte *info_ptr)
15465 struct dwarf2_cu *cu = reader->cu;
15466 struct objfile *objfile = cu->objfile;
15467 const gdb_byte *buffer = reader->buffer;
15469 struct attribute attr;
15470 int has_low_pc_attr = 0;
15471 int has_high_pc_attr = 0;
15472 int high_pc_relative = 0;
15474 memset (part_die, 0, sizeof (struct partial_die_info));
15476 part_die->offset.sect_off = info_ptr - buffer;
15478 info_ptr += abbrev_len;
15480 if (abbrev == NULL)
15483 part_die->tag = abbrev->tag;
15484 part_die->has_children = abbrev->has_children;
15486 for (i = 0; i < abbrev->num_attrs; ++i)
15488 info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
15490 /* Store the data if it is of an attribute we want to keep in a
15491 partial symbol table. */
15495 switch (part_die->tag)
15497 case DW_TAG_compile_unit:
15498 case DW_TAG_partial_unit:
15499 case DW_TAG_type_unit:
15500 /* Compilation units have a DW_AT_name that is a filename, not
15501 a source language identifier. */
15502 case DW_TAG_enumeration_type:
15503 case DW_TAG_enumerator:
15504 /* These tags always have simple identifiers already; no need
15505 to canonicalize them. */
15506 part_die->name = DW_STRING (&attr);
15510 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
15511 &objfile->objfile_obstack);
15515 case DW_AT_linkage_name:
15516 case DW_AT_MIPS_linkage_name:
15517 /* Note that both forms of linkage name might appear. We
15518 assume they will be the same, and we only store the last
15520 if (cu->language == language_ada)
15521 part_die->name = DW_STRING (&attr);
15522 part_die->linkage_name = DW_STRING (&attr);
15525 has_low_pc_attr = 1;
15526 part_die->lowpc = attr_value_as_address (&attr);
15528 case DW_AT_high_pc:
15529 has_high_pc_attr = 1;
15530 part_die->highpc = attr_value_as_address (&attr);
15531 if (cu->header.version >= 4 && attr_form_is_constant (&attr))
15532 high_pc_relative = 1;
15534 case DW_AT_location:
15535 /* Support the .debug_loc offsets. */
15536 if (attr_form_is_block (&attr))
15538 part_die->d.locdesc = DW_BLOCK (&attr);
15540 else if (attr_form_is_section_offset (&attr))
15542 dwarf2_complex_location_expr_complaint ();
15546 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15547 "partial symbol information");
15550 case DW_AT_external:
15551 part_die->is_external = DW_UNSND (&attr);
15553 case DW_AT_declaration:
15554 part_die->is_declaration = DW_UNSND (&attr);
15557 part_die->has_type = 1;
15559 case DW_AT_abstract_origin:
15560 case DW_AT_specification:
15561 case DW_AT_extension:
15562 part_die->has_specification = 1;
15563 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
15564 part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt
15565 || cu->per_cu->is_dwz);
15567 case DW_AT_sibling:
15568 /* Ignore absolute siblings, they might point outside of
15569 the current compile unit. */
15570 if (attr.form == DW_FORM_ref_addr)
15571 complaint (&symfile_complaints,
15572 _("ignoring absolute DW_AT_sibling"));
15575 unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off;
15576 const gdb_byte *sibling_ptr = buffer + off;
15578 if (sibling_ptr < info_ptr)
15579 complaint (&symfile_complaints,
15580 _("DW_AT_sibling points backwards"));
15581 else if (sibling_ptr > reader->buffer_end)
15582 dwarf2_section_buffer_overflow_complaint (reader->die_section);
15584 part_die->sibling = sibling_ptr;
15587 case DW_AT_byte_size:
15588 part_die->has_byte_size = 1;
15590 case DW_AT_calling_convention:
15591 /* DWARF doesn't provide a way to identify a program's source-level
15592 entry point. DW_AT_calling_convention attributes are only meant
15593 to describe functions' calling conventions.
15595 However, because it's a necessary piece of information in
15596 Fortran, and because DW_CC_program is the only piece of debugging
15597 information whose definition refers to a 'main program' at all,
15598 several compilers have begun marking Fortran main programs with
15599 DW_CC_program --- even when those functions use the standard
15600 calling conventions.
15602 So until DWARF specifies a way to provide this information and
15603 compilers pick up the new representation, we'll support this
15605 if (DW_UNSND (&attr) == DW_CC_program
15606 && cu->language == language_fortran)
15607 set_objfile_main_name (objfile, part_die->name, language_fortran);
15610 if (DW_UNSND (&attr) == DW_INL_inlined
15611 || DW_UNSND (&attr) == DW_INL_declared_inlined)
15612 part_die->may_be_inlined = 1;
15616 if (part_die->tag == DW_TAG_imported_unit)
15618 part_die->d.offset = dwarf2_get_ref_die_offset (&attr);
15619 part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt
15620 || cu->per_cu->is_dwz);
15629 if (high_pc_relative)
15630 part_die->highpc += part_die->lowpc;
15632 if (has_low_pc_attr && has_high_pc_attr)
15634 /* When using the GNU linker, .gnu.linkonce. sections are used to
15635 eliminate duplicate copies of functions and vtables and such.
15636 The linker will arbitrarily choose one and discard the others.
15637 The AT_*_pc values for such functions refer to local labels in
15638 these sections. If the section from that file was discarded, the
15639 labels are not in the output, so the relocs get a value of 0.
15640 If this is a discarded function, mark the pc bounds as invalid,
15641 so that GDB will ignore it. */
15642 if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero)
15644 struct gdbarch *gdbarch = get_objfile_arch (objfile);
15646 complaint (&symfile_complaints,
15647 _("DW_AT_low_pc %s is zero "
15648 "for DIE at 0x%x [in module %s]"),
15649 paddress (gdbarch, part_die->lowpc),
15650 part_die->offset.sect_off, objfile_name (objfile));
15652 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15653 else if (part_die->lowpc >= part_die->highpc)
15655 struct gdbarch *gdbarch = get_objfile_arch (objfile);
15657 complaint (&symfile_complaints,
15658 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15659 "for DIE at 0x%x [in module %s]"),
15660 paddress (gdbarch, part_die->lowpc),
15661 paddress (gdbarch, part_die->highpc),
15662 part_die->offset.sect_off, objfile_name (objfile));
15665 part_die->has_pc_info = 1;
15671 /* Find a cached partial DIE at OFFSET in CU. */
15673 static struct partial_die_info *
15674 find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu)
15676 struct partial_die_info *lookup_die = NULL;
15677 struct partial_die_info part_die;
15679 part_die.offset = offset;
15680 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die,
15686 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15687 except in the case of .debug_types DIEs which do not reference
15688 outside their CU (they do however referencing other types via
15689 DW_FORM_ref_sig8). */
15691 static struct partial_die_info *
15692 find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu)
15694 struct objfile *objfile = cu->objfile;
15695 struct dwarf2_per_cu_data *per_cu = NULL;
15696 struct partial_die_info *pd = NULL;
15698 if (offset_in_dwz == cu->per_cu->is_dwz
15699 && offset_in_cu_p (&cu->header, offset))
15701 pd = find_partial_die_in_comp_unit (offset, cu);
15704 /* We missed recording what we needed.
15705 Load all dies and try again. */
15706 per_cu = cu->per_cu;
15710 /* TUs don't reference other CUs/TUs (except via type signatures). */
15711 if (cu->per_cu->is_debug_types)
15713 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15714 " external reference to offset 0x%lx [in module %s].\n"),
15715 (long) cu->header.offset.sect_off, (long) offset.sect_off,
15716 bfd_get_filename (objfile->obfd));
15718 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
15721 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
15722 load_partial_comp_unit (per_cu);
15724 per_cu->cu->last_used = 0;
15725 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
15728 /* If we didn't find it, and not all dies have been loaded,
15729 load them all and try again. */
15731 if (pd == NULL && per_cu->load_all_dies == 0)
15733 per_cu->load_all_dies = 1;
15735 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15736 THIS_CU->cu may already be in use. So we can't just free it and
15737 replace its DIEs with the ones we read in. Instead, we leave those
15738 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15739 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15741 load_partial_comp_unit (per_cu);
15743 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
15747 internal_error (__FILE__, __LINE__,
15748 _("could not find partial DIE 0x%x "
15749 "in cache [from module %s]\n"),
15750 offset.sect_off, bfd_get_filename (objfile->obfd));
15754 /* See if we can figure out if the class lives in a namespace. We do
15755 this by looking for a member function; its demangled name will
15756 contain namespace info, if there is any. */
15759 guess_partial_die_structure_name (struct partial_die_info *struct_pdi,
15760 struct dwarf2_cu *cu)
15762 /* NOTE: carlton/2003-10-07: Getting the info this way changes
15763 what template types look like, because the demangler
15764 frequently doesn't give the same name as the debug info. We
15765 could fix this by only using the demangled name to get the
15766 prefix (but see comment in read_structure_type). */
15768 struct partial_die_info *real_pdi;
15769 struct partial_die_info *child_pdi;
15771 /* If this DIE (this DIE's specification, if any) has a parent, then
15772 we should not do this. We'll prepend the parent's fully qualified
15773 name when we create the partial symbol. */
15775 real_pdi = struct_pdi;
15776 while (real_pdi->has_specification)
15777 real_pdi = find_partial_die (real_pdi->spec_offset,
15778 real_pdi->spec_is_dwz, cu);
15780 if (real_pdi->die_parent != NULL)
15783 for (child_pdi = struct_pdi->die_child;
15785 child_pdi = child_pdi->die_sibling)
15787 if (child_pdi->tag == DW_TAG_subprogram
15788 && child_pdi->linkage_name != NULL)
15790 char *actual_class_name
15791 = language_class_name_from_physname (cu->language_defn,
15792 child_pdi->linkage_name);
15793 if (actual_class_name != NULL)
15796 = obstack_copy0 (&cu->objfile->objfile_obstack,
15798 strlen (actual_class_name));
15799 xfree (actual_class_name);
15806 /* Adjust PART_DIE before generating a symbol for it. This function
15807 may set the is_external flag or change the DIE's name. */
15810 fixup_partial_die (struct partial_die_info *part_die,
15811 struct dwarf2_cu *cu)
15813 /* Once we've fixed up a die, there's no point in doing so again.
15814 This also avoids a memory leak if we were to call
15815 guess_partial_die_structure_name multiple times. */
15816 if (part_die->fixup_called)
15819 /* If we found a reference attribute and the DIE has no name, try
15820 to find a name in the referred to DIE. */
15822 if (part_die->name == NULL && part_die->has_specification)
15824 struct partial_die_info *spec_die;
15826 spec_die = find_partial_die (part_die->spec_offset,
15827 part_die->spec_is_dwz, cu);
15829 fixup_partial_die (spec_die, cu);
15831 if (spec_die->name)
15833 part_die->name = spec_die->name;
15835 /* Copy DW_AT_external attribute if it is set. */
15836 if (spec_die->is_external)
15837 part_die->is_external = spec_die->is_external;
15841 /* Set default names for some unnamed DIEs. */
15843 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
15844 part_die->name = CP_ANONYMOUS_NAMESPACE_STR;
15846 /* If there is no parent die to provide a namespace, and there are
15847 children, see if we can determine the namespace from their linkage
15849 if (cu->language == language_cplus
15850 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
15851 && part_die->die_parent == NULL
15852 && part_die->has_children
15853 && (part_die->tag == DW_TAG_class_type
15854 || part_die->tag == DW_TAG_structure_type
15855 || part_die->tag == DW_TAG_union_type))
15856 guess_partial_die_structure_name (part_die, cu);
15858 /* GCC might emit a nameless struct or union that has a linkage
15859 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15860 if (part_die->name == NULL
15861 && (part_die->tag == DW_TAG_class_type
15862 || part_die->tag == DW_TAG_interface_type
15863 || part_die->tag == DW_TAG_structure_type
15864 || part_die->tag == DW_TAG_union_type)
15865 && part_die->linkage_name != NULL)
15869 demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES);
15874 /* Strip any leading namespaces/classes, keep only the base name.
15875 DW_AT_name for named DIEs does not contain the prefixes. */
15876 base = strrchr (demangled, ':');
15877 if (base && base > demangled && base[-1] == ':')
15882 part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack,
15883 base, strlen (base));
15888 part_die->fixup_called = 1;
15891 /* Read an attribute value described by an attribute form. */
15893 static const gdb_byte *
15894 read_attribute_value (const struct die_reader_specs *reader,
15895 struct attribute *attr, unsigned form,
15896 const gdb_byte *info_ptr)
15898 struct dwarf2_cu *cu = reader->cu;
15899 bfd *abfd = reader->abfd;
15900 struct comp_unit_head *cu_header = &cu->header;
15901 unsigned int bytes_read;
15902 struct dwarf_block *blk;
15907 case DW_FORM_ref_addr:
15908 if (cu->header.version == 2)
15909 DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
15911 DW_UNSND (attr) = read_offset (abfd, info_ptr,
15912 &cu->header, &bytes_read);
15913 info_ptr += bytes_read;
15915 case DW_FORM_GNU_ref_alt:
15916 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
15917 info_ptr += bytes_read;
15920 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
15921 info_ptr += bytes_read;
15923 case DW_FORM_block2:
15924 blk = dwarf_alloc_block (cu);
15925 blk->size = read_2_bytes (abfd, info_ptr);
15927 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15928 info_ptr += blk->size;
15929 DW_BLOCK (attr) = blk;
15931 case DW_FORM_block4:
15932 blk = dwarf_alloc_block (cu);
15933 blk->size = read_4_bytes (abfd, info_ptr);
15935 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15936 info_ptr += blk->size;
15937 DW_BLOCK (attr) = blk;
15939 case DW_FORM_data2:
15940 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
15943 case DW_FORM_data4:
15944 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
15947 case DW_FORM_data8:
15948 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
15951 case DW_FORM_sec_offset:
15952 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
15953 info_ptr += bytes_read;
15955 case DW_FORM_string:
15956 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
15957 DW_STRING_IS_CANONICAL (attr) = 0;
15958 info_ptr += bytes_read;
15961 if (!cu->per_cu->is_dwz)
15963 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
15965 DW_STRING_IS_CANONICAL (attr) = 0;
15966 info_ptr += bytes_read;
15970 case DW_FORM_GNU_strp_alt:
15972 struct dwz_file *dwz = dwarf2_get_dwz_file ();
15973 LONGEST str_offset = read_offset (abfd, info_ptr, cu_header,
15976 DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset);
15977 DW_STRING_IS_CANONICAL (attr) = 0;
15978 info_ptr += bytes_read;
15981 case DW_FORM_exprloc:
15982 case DW_FORM_block:
15983 blk = dwarf_alloc_block (cu);
15984 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
15985 info_ptr += bytes_read;
15986 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15987 info_ptr += blk->size;
15988 DW_BLOCK (attr) = blk;
15990 case DW_FORM_block1:
15991 blk = dwarf_alloc_block (cu);
15992 blk->size = read_1_byte (abfd, info_ptr);
15994 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15995 info_ptr += blk->size;
15996 DW_BLOCK (attr) = blk;
15998 case DW_FORM_data1:
15999 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
16003 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
16006 case DW_FORM_flag_present:
16007 DW_UNSND (attr) = 1;
16009 case DW_FORM_sdata:
16010 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
16011 info_ptr += bytes_read;
16013 case DW_FORM_udata:
16014 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
16015 info_ptr += bytes_read;
16018 DW_UNSND (attr) = (cu->header.offset.sect_off
16019 + read_1_byte (abfd, info_ptr));
16023 DW_UNSND (attr) = (cu->header.offset.sect_off
16024 + read_2_bytes (abfd, info_ptr));
16028 DW_UNSND (attr) = (cu->header.offset.sect_off
16029 + read_4_bytes (abfd, info_ptr));
16033 DW_UNSND (attr) = (cu->header.offset.sect_off
16034 + read_8_bytes (abfd, info_ptr));
16037 case DW_FORM_ref_sig8:
16038 DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr);
16041 case DW_FORM_ref_udata:
16042 DW_UNSND (attr) = (cu->header.offset.sect_off
16043 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
16044 info_ptr += bytes_read;
16046 case DW_FORM_indirect:
16047 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
16048 info_ptr += bytes_read;
16049 info_ptr = read_attribute_value (reader, attr, form, info_ptr);
16051 case DW_FORM_GNU_addr_index:
16052 if (reader->dwo_file == NULL)
16054 /* For now flag a hard error.
16055 Later we can turn this into a complaint. */
16056 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16057 dwarf_form_name (form),
16058 bfd_get_filename (abfd));
16060 DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read);
16061 info_ptr += bytes_read;
16063 case DW_FORM_GNU_str_index:
16064 if (reader->dwo_file == NULL)
16066 /* For now flag a hard error.
16067 Later we can turn this into a complaint if warranted. */
16068 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16069 dwarf_form_name (form),
16070 bfd_get_filename (abfd));
16073 ULONGEST str_index =
16074 read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
16076 DW_STRING (attr) = read_str_index (reader, str_index);
16077 DW_STRING_IS_CANONICAL (attr) = 0;
16078 info_ptr += bytes_read;
16082 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16083 dwarf_form_name (form),
16084 bfd_get_filename (abfd));
16088 if (cu->per_cu->is_dwz && attr_form_is_ref (attr))
16089 attr->form = DW_FORM_GNU_ref_alt;
16091 /* We have seen instances where the compiler tried to emit a byte
16092 size attribute of -1 which ended up being encoded as an unsigned
16093 0xffffffff. Although 0xffffffff is technically a valid size value,
16094 an object of this size seems pretty unlikely so we can relatively
16095 safely treat these cases as if the size attribute was invalid and
16096 treat them as zero by default. */
16097 if (attr->name == DW_AT_byte_size
16098 && form == DW_FORM_data4
16099 && DW_UNSND (attr) >= 0xffffffff)
16102 (&symfile_complaints,
16103 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16104 hex_string (DW_UNSND (attr)));
16105 DW_UNSND (attr) = 0;
16111 /* Read an attribute described by an abbreviated attribute. */
16113 static const gdb_byte *
16114 read_attribute (const struct die_reader_specs *reader,
16115 struct attribute *attr, struct attr_abbrev *abbrev,
16116 const gdb_byte *info_ptr)
16118 attr->name = abbrev->name;
16119 return read_attribute_value (reader, attr, abbrev->form, info_ptr);
16122 /* Read dwarf information from a buffer. */
16124 static unsigned int
16125 read_1_byte (bfd *abfd, const gdb_byte *buf)
16127 return bfd_get_8 (abfd, buf);
16131 read_1_signed_byte (bfd *abfd, const gdb_byte *buf)
16133 return bfd_get_signed_8 (abfd, buf);
16136 static unsigned int
16137 read_2_bytes (bfd *abfd, const gdb_byte *buf)
16139 return bfd_get_16 (abfd, buf);
16143 read_2_signed_bytes (bfd *abfd, const gdb_byte *buf)
16145 return bfd_get_signed_16 (abfd, buf);
16148 static unsigned int
16149 read_4_bytes (bfd *abfd, const gdb_byte *buf)
16151 return bfd_get_32 (abfd, buf);
16155 read_4_signed_bytes (bfd *abfd, const gdb_byte *buf)
16157 return bfd_get_signed_32 (abfd, buf);
16161 read_8_bytes (bfd *abfd, const gdb_byte *buf)
16163 return bfd_get_64 (abfd, buf);
16167 read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu,
16168 unsigned int *bytes_read)
16170 struct comp_unit_head *cu_header = &cu->header;
16171 CORE_ADDR retval = 0;
16173 if (cu_header->signed_addr_p)
16175 switch (cu_header->addr_size)
16178 retval = bfd_get_signed_16 (abfd, buf);
16181 retval = bfd_get_signed_32 (abfd, buf);
16184 retval = bfd_get_signed_64 (abfd, buf);
16187 internal_error (__FILE__, __LINE__,
16188 _("read_address: bad switch, signed [in module %s]"),
16189 bfd_get_filename (abfd));
16194 switch (cu_header->addr_size)
16197 retval = bfd_get_16 (abfd, buf);
16200 retval = bfd_get_32 (abfd, buf);
16203 retval = bfd_get_64 (abfd, buf);
16206 internal_error (__FILE__, __LINE__,
16207 _("read_address: bad switch, "
16208 "unsigned [in module %s]"),
16209 bfd_get_filename (abfd));
16213 *bytes_read = cu_header->addr_size;
16217 /* Read the initial length from a section. The (draft) DWARF 3
16218 specification allows the initial length to take up either 4 bytes
16219 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16220 bytes describe the length and all offsets will be 8 bytes in length
16223 An older, non-standard 64-bit format is also handled by this
16224 function. The older format in question stores the initial length
16225 as an 8-byte quantity without an escape value. Lengths greater
16226 than 2^32 aren't very common which means that the initial 4 bytes
16227 is almost always zero. Since a length value of zero doesn't make
16228 sense for the 32-bit format, this initial zero can be considered to
16229 be an escape value which indicates the presence of the older 64-bit
16230 format. As written, the code can't detect (old format) lengths
16231 greater than 4GB. If it becomes necessary to handle lengths
16232 somewhat larger than 4GB, we could allow other small values (such
16233 as the non-sensical values of 1, 2, and 3) to also be used as
16234 escape values indicating the presence of the old format.
16236 The value returned via bytes_read should be used to increment the
16237 relevant pointer after calling read_initial_length().
16239 [ Note: read_initial_length() and read_offset() are based on the
16240 document entitled "DWARF Debugging Information Format", revision
16241 3, draft 8, dated November 19, 2001. This document was obtained
16244 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16246 This document is only a draft and is subject to change. (So beware.)
16248 Details regarding the older, non-standard 64-bit format were
16249 determined empirically by examining 64-bit ELF files produced by
16250 the SGI toolchain on an IRIX 6.5 machine.
16252 - Kevin, July 16, 2002
16256 read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read)
16258 LONGEST length = bfd_get_32 (abfd, buf);
16260 if (length == 0xffffffff)
16262 length = bfd_get_64 (abfd, buf + 4);
16265 else if (length == 0)
16267 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16268 length = bfd_get_64 (abfd, buf);
16279 /* Cover function for read_initial_length.
16280 Returns the length of the object at BUF, and stores the size of the
16281 initial length in *BYTES_READ and stores the size that offsets will be in
16283 If the initial length size is not equivalent to that specified in
16284 CU_HEADER then issue a complaint.
16285 This is useful when reading non-comp-unit headers. */
16288 read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf,
16289 const struct comp_unit_head *cu_header,
16290 unsigned int *bytes_read,
16291 unsigned int *offset_size)
16293 LONGEST length = read_initial_length (abfd, buf, bytes_read);
16295 gdb_assert (cu_header->initial_length_size == 4
16296 || cu_header->initial_length_size == 8
16297 || cu_header->initial_length_size == 12);
16299 if (cu_header->initial_length_size != *bytes_read)
16300 complaint (&symfile_complaints,
16301 _("intermixed 32-bit and 64-bit DWARF sections"));
16303 *offset_size = (*bytes_read == 4) ? 4 : 8;
16307 /* Read an offset from the data stream. The size of the offset is
16308 given by cu_header->offset_size. */
16311 read_offset (bfd *abfd, const gdb_byte *buf,
16312 const struct comp_unit_head *cu_header,
16313 unsigned int *bytes_read)
16315 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
16317 *bytes_read = cu_header->offset_size;
16321 /* Read an offset from the data stream. */
16324 read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size)
16326 LONGEST retval = 0;
16328 switch (offset_size)
16331 retval = bfd_get_32 (abfd, buf);
16334 retval = bfd_get_64 (abfd, buf);
16337 internal_error (__FILE__, __LINE__,
16338 _("read_offset_1: bad switch [in module %s]"),
16339 bfd_get_filename (abfd));
16345 static const gdb_byte *
16346 read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size)
16348 /* If the size of a host char is 8 bits, we can return a pointer
16349 to the buffer, otherwise we have to copy the data to a buffer
16350 allocated on the temporary obstack. */
16351 gdb_assert (HOST_CHAR_BIT == 8);
16355 static const char *
16356 read_direct_string (bfd *abfd, const gdb_byte *buf,
16357 unsigned int *bytes_read_ptr)
16359 /* If the size of a host char is 8 bits, we can return a pointer
16360 to the string, otherwise we have to copy the string to a buffer
16361 allocated on the temporary obstack. */
16362 gdb_assert (HOST_CHAR_BIT == 8);
16365 *bytes_read_ptr = 1;
16368 *bytes_read_ptr = strlen ((const char *) buf) + 1;
16369 return (const char *) buf;
16372 static const char *
16373 read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset)
16375 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
16376 if (dwarf2_per_objfile->str.buffer == NULL)
16377 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16378 bfd_get_filename (abfd));
16379 if (str_offset >= dwarf2_per_objfile->str.size)
16380 error (_("DW_FORM_strp pointing outside of "
16381 ".debug_str section [in module %s]"),
16382 bfd_get_filename (abfd));
16383 gdb_assert (HOST_CHAR_BIT == 8);
16384 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
16386 return (const char *) (dwarf2_per_objfile->str.buffer + str_offset);
16389 /* Read a string at offset STR_OFFSET in the .debug_str section from
16390 the .dwz file DWZ. Throw an error if the offset is too large. If
16391 the string consists of a single NUL byte, return NULL; otherwise
16392 return a pointer to the string. */
16394 static const char *
16395 read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset)
16397 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str);
16399 if (dwz->str.buffer == NULL)
16400 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16401 "section [in module %s]"),
16402 bfd_get_filename (dwz->dwz_bfd));
16403 if (str_offset >= dwz->str.size)
16404 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16405 ".debug_str section [in module %s]"),
16406 bfd_get_filename (dwz->dwz_bfd));
16407 gdb_assert (HOST_CHAR_BIT == 8);
16408 if (dwz->str.buffer[str_offset] == '\0')
16410 return (const char *) (dwz->str.buffer + str_offset);
16413 static const char *
16414 read_indirect_string (bfd *abfd, const gdb_byte *buf,
16415 const struct comp_unit_head *cu_header,
16416 unsigned int *bytes_read_ptr)
16418 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
16420 return read_indirect_string_at_offset (abfd, str_offset);
16424 read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf,
16425 unsigned int *bytes_read_ptr)
16428 unsigned int num_read;
16430 unsigned char byte;
16438 byte = bfd_get_8 (abfd, buf);
16441 result |= ((ULONGEST) (byte & 127) << shift);
16442 if ((byte & 128) == 0)
16448 *bytes_read_ptr = num_read;
16453 read_signed_leb128 (bfd *abfd, const gdb_byte *buf,
16454 unsigned int *bytes_read_ptr)
16457 int i, shift, num_read;
16458 unsigned char byte;
16466 byte = bfd_get_8 (abfd, buf);
16469 result |= ((LONGEST) (byte & 127) << shift);
16471 if ((byte & 128) == 0)
16476 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
16477 result |= -(((LONGEST) 1) << shift);
16478 *bytes_read_ptr = num_read;
16482 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16483 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16484 ADDR_SIZE is the size of addresses from the CU header. */
16487 read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size)
16489 struct objfile *objfile = dwarf2_per_objfile->objfile;
16490 bfd *abfd = objfile->obfd;
16491 const gdb_byte *info_ptr;
16493 dwarf2_read_section (objfile, &dwarf2_per_objfile->addr);
16494 if (dwarf2_per_objfile->addr.buffer == NULL)
16495 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16496 objfile_name (objfile));
16497 if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size)
16498 error (_("DW_FORM_addr_index pointing outside of "
16499 ".debug_addr section [in module %s]"),
16500 objfile_name (objfile));
16501 info_ptr = (dwarf2_per_objfile->addr.buffer
16502 + addr_base + addr_index * addr_size);
16503 if (addr_size == 4)
16504 return bfd_get_32 (abfd, info_ptr);
16506 return bfd_get_64 (abfd, info_ptr);
16509 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16512 read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index)
16514 return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size);
16517 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16520 read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr,
16521 unsigned int *bytes_read)
16523 bfd *abfd = cu->objfile->obfd;
16524 unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
16526 return read_addr_index (cu, addr_index);
16529 /* Data structure to pass results from dwarf2_read_addr_index_reader
16530 back to dwarf2_read_addr_index. */
16532 struct dwarf2_read_addr_index_data
16534 ULONGEST addr_base;
16538 /* die_reader_func for dwarf2_read_addr_index. */
16541 dwarf2_read_addr_index_reader (const struct die_reader_specs *reader,
16542 const gdb_byte *info_ptr,
16543 struct die_info *comp_unit_die,
16547 struct dwarf2_cu *cu = reader->cu;
16548 struct dwarf2_read_addr_index_data *aidata =
16549 (struct dwarf2_read_addr_index_data *) data;
16551 aidata->addr_base = cu->addr_base;
16552 aidata->addr_size = cu->header.addr_size;
16555 /* Given an index in .debug_addr, fetch the value.
16556 NOTE: This can be called during dwarf expression evaluation,
16557 long after the debug information has been read, and thus per_cu->cu
16558 may no longer exist. */
16561 dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
16562 unsigned int addr_index)
16564 struct objfile *objfile = per_cu->objfile;
16565 struct dwarf2_cu *cu = per_cu->cu;
16566 ULONGEST addr_base;
16569 /* This is intended to be called from outside this file. */
16570 dw2_setup (objfile);
16572 /* We need addr_base and addr_size.
16573 If we don't have PER_CU->cu, we have to get it.
16574 Nasty, but the alternative is storing the needed info in PER_CU,
16575 which at this point doesn't seem justified: it's not clear how frequently
16576 it would get used and it would increase the size of every PER_CU.
16577 Entry points like dwarf2_per_cu_addr_size do a similar thing
16578 so we're not in uncharted territory here.
16579 Alas we need to be a bit more complicated as addr_base is contained
16582 We don't need to read the entire CU(/TU).
16583 We just need the header and top level die.
16585 IWBN to use the aging mechanism to let us lazily later discard the CU.
16586 For now we skip this optimization. */
16590 addr_base = cu->addr_base;
16591 addr_size = cu->header.addr_size;
16595 struct dwarf2_read_addr_index_data aidata;
16597 /* Note: We can't use init_cutu_and_read_dies_simple here,
16598 we need addr_base. */
16599 init_cutu_and_read_dies (per_cu, NULL, 0, 0,
16600 dwarf2_read_addr_index_reader, &aidata);
16601 addr_base = aidata.addr_base;
16602 addr_size = aidata.addr_size;
16605 return read_addr_index_1 (addr_index, addr_base, addr_size);
16608 /* Given a DW_FORM_GNU_str_index, fetch the string.
16609 This is only used by the Fission support. */
16611 static const char *
16612 read_str_index (const struct die_reader_specs *reader, ULONGEST str_index)
16614 struct objfile *objfile = dwarf2_per_objfile->objfile;
16615 const char *objf_name = objfile_name (objfile);
16616 bfd *abfd = objfile->obfd;
16617 struct dwarf2_cu *cu = reader->cu;
16618 struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str;
16619 struct dwarf2_section_info *str_offsets_section =
16620 &reader->dwo_file->sections.str_offsets;
16621 const gdb_byte *info_ptr;
16622 ULONGEST str_offset;
16623 static const char form_name[] = "DW_FORM_GNU_str_index";
16625 dwarf2_read_section (objfile, str_section);
16626 dwarf2_read_section (objfile, str_offsets_section);
16627 if (str_section->buffer == NULL)
16628 error (_("%s used without .debug_str.dwo section"
16629 " in CU at offset 0x%lx [in module %s]"),
16630 form_name, (long) cu->header.offset.sect_off, objf_name);
16631 if (str_offsets_section->buffer == NULL)
16632 error (_("%s used without .debug_str_offsets.dwo section"
16633 " in CU at offset 0x%lx [in module %s]"),
16634 form_name, (long) cu->header.offset.sect_off, objf_name);
16635 if (str_index * cu->header.offset_size >= str_offsets_section->size)
16636 error (_("%s pointing outside of .debug_str_offsets.dwo"
16637 " section in CU at offset 0x%lx [in module %s]"),
16638 form_name, (long) cu->header.offset.sect_off, objf_name);
16639 info_ptr = (str_offsets_section->buffer
16640 + str_index * cu->header.offset_size);
16641 if (cu->header.offset_size == 4)
16642 str_offset = bfd_get_32 (abfd, info_ptr);
16644 str_offset = bfd_get_64 (abfd, info_ptr);
16645 if (str_offset >= str_section->size)
16646 error (_("Offset from %s pointing outside of"
16647 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16648 form_name, (long) cu->header.offset.sect_off, objf_name);
16649 return (const char *) (str_section->buffer + str_offset);
16652 /* Return the length of an LEB128 number in BUF. */
16655 leb128_size (const gdb_byte *buf)
16657 const gdb_byte *begin = buf;
16663 if ((byte & 128) == 0)
16664 return buf - begin;
16669 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
16677 cu->language = language_c;
16679 case DW_LANG_C_plus_plus:
16680 cu->language = language_cplus;
16683 cu->language = language_d;
16685 case DW_LANG_Fortran77:
16686 case DW_LANG_Fortran90:
16687 case DW_LANG_Fortran95:
16688 cu->language = language_fortran;
16691 cu->language = language_go;
16693 case DW_LANG_Mips_Assembler:
16694 cu->language = language_asm;
16697 cu->language = language_java;
16699 case DW_LANG_Ada83:
16700 case DW_LANG_Ada95:
16701 cu->language = language_ada;
16703 case DW_LANG_Modula2:
16704 cu->language = language_m2;
16706 case DW_LANG_Pascal83:
16707 cu->language = language_pascal;
16710 cu->language = language_objc;
16712 case DW_LANG_Cobol74:
16713 case DW_LANG_Cobol85:
16715 cu->language = language_minimal;
16718 cu->language_defn = language_def (cu->language);
16721 /* Return the named attribute or NULL if not there. */
16723 static struct attribute *
16724 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
16729 struct attribute *spec = NULL;
16731 for (i = 0; i < die->num_attrs; ++i)
16733 if (die->attrs[i].name == name)
16734 return &die->attrs[i];
16735 if (die->attrs[i].name == DW_AT_specification
16736 || die->attrs[i].name == DW_AT_abstract_origin)
16737 spec = &die->attrs[i];
16743 die = follow_die_ref (die, spec, &cu);
16749 /* Return the named attribute or NULL if not there,
16750 but do not follow DW_AT_specification, etc.
16751 This is for use in contexts where we're reading .debug_types dies.
16752 Following DW_AT_specification, DW_AT_abstract_origin will take us
16753 back up the chain, and we want to go down. */
16755 static struct attribute *
16756 dwarf2_attr_no_follow (struct die_info *die, unsigned int name)
16760 for (i = 0; i < die->num_attrs; ++i)
16761 if (die->attrs[i].name == name)
16762 return &die->attrs[i];
16767 /* Return non-zero iff the attribute NAME is defined for the given DIE,
16768 and holds a non-zero value. This function should only be used for
16769 DW_FORM_flag or DW_FORM_flag_present attributes. */
16772 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
16774 struct attribute *attr = dwarf2_attr (die, name, cu);
16776 return (attr && DW_UNSND (attr));
16780 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
16782 /* A DIE is a declaration if it has a DW_AT_declaration attribute
16783 which value is non-zero. However, we have to be careful with
16784 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
16785 (via dwarf2_flag_true_p) follows this attribute. So we may
16786 end up accidently finding a declaration attribute that belongs
16787 to a different DIE referenced by the specification attribute,
16788 even though the given DIE does not have a declaration attribute. */
16789 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
16790 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
16793 /* Return the die giving the specification for DIE, if there is
16794 one. *SPEC_CU is the CU containing DIE on input, and the CU
16795 containing the return value on output. If there is no
16796 specification, but there is an abstract origin, that is
16799 static struct die_info *
16800 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
16802 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
16805 if (spec_attr == NULL)
16806 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
16808 if (spec_attr == NULL)
16811 return follow_die_ref (die, spec_attr, spec_cu);
16814 /* Free the line_header structure *LH, and any arrays and strings it
16816 NOTE: This is also used as a "cleanup" function. */
16819 free_line_header (struct line_header *lh)
16821 if (lh->standard_opcode_lengths)
16822 xfree (lh->standard_opcode_lengths);
16824 /* Remember that all the lh->file_names[i].name pointers are
16825 pointers into debug_line_buffer, and don't need to be freed. */
16826 if (lh->file_names)
16827 xfree (lh->file_names);
16829 /* Similarly for the include directory names. */
16830 if (lh->include_dirs)
16831 xfree (lh->include_dirs);
16836 /* Add an entry to LH's include directory table. */
16839 add_include_dir (struct line_header *lh, const char *include_dir)
16841 /* Grow the array if necessary. */
16842 if (lh->include_dirs_size == 0)
16844 lh->include_dirs_size = 1; /* for testing */
16845 lh->include_dirs = xmalloc (lh->include_dirs_size
16846 * sizeof (*lh->include_dirs));
16848 else if (lh->num_include_dirs >= lh->include_dirs_size)
16850 lh->include_dirs_size *= 2;
16851 lh->include_dirs = xrealloc (lh->include_dirs,
16852 (lh->include_dirs_size
16853 * sizeof (*lh->include_dirs)));
16856 lh->include_dirs[lh->num_include_dirs++] = include_dir;
16859 /* Add an entry to LH's file name table. */
16862 add_file_name (struct line_header *lh,
16864 unsigned int dir_index,
16865 unsigned int mod_time,
16866 unsigned int length)
16868 struct file_entry *fe;
16870 /* Grow the array if necessary. */
16871 if (lh->file_names_size == 0)
16873 lh->file_names_size = 1; /* for testing */
16874 lh->file_names = xmalloc (lh->file_names_size
16875 * sizeof (*lh->file_names));
16877 else if (lh->num_file_names >= lh->file_names_size)
16879 lh->file_names_size *= 2;
16880 lh->file_names = xrealloc (lh->file_names,
16881 (lh->file_names_size
16882 * sizeof (*lh->file_names)));
16885 fe = &lh->file_names[lh->num_file_names++];
16887 fe->dir_index = dir_index;
16888 fe->mod_time = mod_time;
16889 fe->length = length;
16890 fe->included_p = 0;
16894 /* A convenience function to find the proper .debug_line section for a
16897 static struct dwarf2_section_info *
16898 get_debug_line_section (struct dwarf2_cu *cu)
16900 struct dwarf2_section_info *section;
16902 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
16904 if (cu->dwo_unit && cu->per_cu->is_debug_types)
16905 section = &cu->dwo_unit->dwo_file->sections.line;
16906 else if (cu->per_cu->is_dwz)
16908 struct dwz_file *dwz = dwarf2_get_dwz_file ();
16910 section = &dwz->line;
16913 section = &dwarf2_per_objfile->line;
16918 /* Read the statement program header starting at OFFSET in
16919 .debug_line, or .debug_line.dwo. Return a pointer
16920 to a struct line_header, allocated using xmalloc.
16922 NOTE: the strings in the include directory and file name tables of
16923 the returned object point into the dwarf line section buffer,
16924 and must not be freed. */
16926 static struct line_header *
16927 dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu)
16929 struct cleanup *back_to;
16930 struct line_header *lh;
16931 const gdb_byte *line_ptr;
16932 unsigned int bytes_read, offset_size;
16934 const char *cur_dir, *cur_file;
16935 struct dwarf2_section_info *section;
16938 section = get_debug_line_section (cu);
16939 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
16940 if (section->buffer == NULL)
16942 if (cu->dwo_unit && cu->per_cu->is_debug_types)
16943 complaint (&symfile_complaints, _("missing .debug_line.dwo section"));
16945 complaint (&symfile_complaints, _("missing .debug_line section"));
16949 /* We can't do this until we know the section is non-empty.
16950 Only then do we know we have such a section. */
16951 abfd = get_section_bfd_owner (section);
16953 /* Make sure that at least there's room for the total_length field.
16954 That could be 12 bytes long, but we're just going to fudge that. */
16955 if (offset + 4 >= section->size)
16957 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16961 lh = xmalloc (sizeof (*lh));
16962 memset (lh, 0, sizeof (*lh));
16963 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
16966 line_ptr = section->buffer + offset;
16968 /* Read in the header. */
16970 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
16971 &bytes_read, &offset_size);
16972 line_ptr += bytes_read;
16973 if (line_ptr + lh->total_length > (section->buffer + section->size))
16975 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16976 do_cleanups (back_to);
16979 lh->statement_program_end = line_ptr + lh->total_length;
16980 lh->version = read_2_bytes (abfd, line_ptr);
16982 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
16983 line_ptr += offset_size;
16984 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
16986 if (lh->version >= 4)
16988 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
16992 lh->maximum_ops_per_instruction = 1;
16994 if (lh->maximum_ops_per_instruction == 0)
16996 lh->maximum_ops_per_instruction = 1;
16997 complaint (&symfile_complaints,
16998 _("invalid maximum_ops_per_instruction "
16999 "in `.debug_line' section"));
17002 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
17004 lh->line_base = read_1_signed_byte (abfd, line_ptr);
17006 lh->line_range = read_1_byte (abfd, line_ptr);
17008 lh->opcode_base = read_1_byte (abfd, line_ptr);
17010 lh->standard_opcode_lengths
17011 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
17013 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
17014 for (i = 1; i < lh->opcode_base; ++i)
17016 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
17020 /* Read directory table. */
17021 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
17023 line_ptr += bytes_read;
17024 add_include_dir (lh, cur_dir);
17026 line_ptr += bytes_read;
17028 /* Read file name table. */
17029 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
17031 unsigned int dir_index, mod_time, length;
17033 line_ptr += bytes_read;
17034 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17035 line_ptr += bytes_read;
17036 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17037 line_ptr += bytes_read;
17038 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17039 line_ptr += bytes_read;
17041 add_file_name (lh, cur_file, dir_index, mod_time, length);
17043 line_ptr += bytes_read;
17044 lh->statement_program_start = line_ptr;
17046 if (line_ptr > (section->buffer + section->size))
17047 complaint (&symfile_complaints,
17048 _("line number info header doesn't "
17049 "fit in `.debug_line' section"));
17051 discard_cleanups (back_to);
17055 /* Subroutine of dwarf_decode_lines to simplify it.
17056 Return the file name of the psymtab for included file FILE_INDEX
17057 in line header LH of PST.
17058 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17059 If space for the result is malloc'd, it will be freed by a cleanup.
17060 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17062 The function creates dangling cleanup registration. */
17064 static const char *
17065 psymtab_include_file_name (const struct line_header *lh, int file_index,
17066 const struct partial_symtab *pst,
17067 const char *comp_dir)
17069 const struct file_entry fe = lh->file_names [file_index];
17070 const char *include_name = fe.name;
17071 const char *include_name_to_compare = include_name;
17072 const char *dir_name = NULL;
17073 const char *pst_filename;
17074 char *copied_name = NULL;
17078 dir_name = lh->include_dirs[fe.dir_index - 1];
17080 if (!IS_ABSOLUTE_PATH (include_name)
17081 && (dir_name != NULL || comp_dir != NULL))
17083 /* Avoid creating a duplicate psymtab for PST.
17084 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17085 Before we do the comparison, however, we need to account
17086 for DIR_NAME and COMP_DIR.
17087 First prepend dir_name (if non-NULL). If we still don't
17088 have an absolute path prepend comp_dir (if non-NULL).
17089 However, the directory we record in the include-file's
17090 psymtab does not contain COMP_DIR (to match the
17091 corresponding symtab(s)).
17096 bash$ gcc -g ./hello.c
17097 include_name = "hello.c"
17099 DW_AT_comp_dir = comp_dir = "/tmp"
17100 DW_AT_name = "./hello.c" */
17102 if (dir_name != NULL)
17104 char *tem = concat (dir_name, SLASH_STRING,
17105 include_name, (char *)NULL);
17107 make_cleanup (xfree, tem);
17108 include_name = tem;
17109 include_name_to_compare = include_name;
17111 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
17113 char *tem = concat (comp_dir, SLASH_STRING,
17114 include_name, (char *)NULL);
17116 make_cleanup (xfree, tem);
17117 include_name_to_compare = tem;
17121 pst_filename = pst->filename;
17122 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
17124 copied_name = concat (pst->dirname, SLASH_STRING,
17125 pst_filename, (char *)NULL);
17126 pst_filename = copied_name;
17129 file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
17131 if (copied_name != NULL)
17132 xfree (copied_name);
17136 return include_name;
17139 /* Ignore this record_line request. */
17142 noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc)
17147 /* Subroutine of dwarf_decode_lines to simplify it.
17148 Process the line number information in LH. */
17151 dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir,
17152 struct dwarf2_cu *cu, struct partial_symtab *pst)
17154 const gdb_byte *line_ptr, *extended_end;
17155 const gdb_byte *line_end;
17156 unsigned int bytes_read, extended_len;
17157 unsigned char op_code, extended_op, adj_opcode;
17158 CORE_ADDR baseaddr;
17159 struct objfile *objfile = cu->objfile;
17160 bfd *abfd = objfile->obfd;
17161 struct gdbarch *gdbarch = get_objfile_arch (objfile);
17162 const int decode_for_pst_p = (pst != NULL);
17163 struct subfile *last_subfile = NULL;
17164 void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc)
17167 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
17169 line_ptr = lh->statement_program_start;
17170 line_end = lh->statement_program_end;
17172 /* Read the statement sequences until there's nothing left. */
17173 while (line_ptr < line_end)
17175 /* state machine registers */
17176 CORE_ADDR address = 0;
17177 unsigned int file = 1;
17178 unsigned int line = 1;
17179 unsigned int column = 0;
17180 int is_stmt = lh->default_is_stmt;
17181 int basic_block = 0;
17182 int end_sequence = 0;
17184 unsigned char op_index = 0;
17186 if (!decode_for_pst_p && lh->num_file_names >= file)
17188 /* Start a subfile for the current file of the state machine. */
17189 /* lh->include_dirs and lh->file_names are 0-based, but the
17190 directory and file name numbers in the statement program
17192 struct file_entry *fe = &lh->file_names[file - 1];
17193 const char *dir = NULL;
17196 dir = lh->include_dirs[fe->dir_index - 1];
17198 dwarf2_start_subfile (fe->name, dir, comp_dir);
17201 /* Decode the table. */
17202 while (!end_sequence)
17204 op_code = read_1_byte (abfd, line_ptr);
17206 if (line_ptr > line_end)
17208 dwarf2_debug_line_missing_end_sequence_complaint ();
17212 if (op_code >= lh->opcode_base)
17214 /* Special operand. */
17215 adj_opcode = op_code - lh->opcode_base;
17216 address += (((op_index + (adj_opcode / lh->line_range))
17217 / lh->maximum_ops_per_instruction)
17218 * lh->minimum_instruction_length);
17219 op_index = ((op_index + (adj_opcode / lh->line_range))
17220 % lh->maximum_ops_per_instruction);
17221 line += lh->line_base + (adj_opcode % lh->line_range);
17222 if (lh->num_file_names < file || file == 0)
17223 dwarf2_debug_line_missing_file_complaint ();
17224 /* For now we ignore lines not starting on an
17225 instruction boundary. */
17226 else if (op_index == 0)
17228 lh->file_names[file - 1].included_p = 1;
17229 if (!decode_for_pst_p && is_stmt)
17231 if (last_subfile != current_subfile)
17233 addr = gdbarch_addr_bits_remove (gdbarch, address);
17235 (*p_record_line) (last_subfile, 0, addr);
17236 last_subfile = current_subfile;
17238 /* Append row to matrix using current values. */
17239 addr = gdbarch_addr_bits_remove (gdbarch, address);
17240 (*p_record_line) (current_subfile, line, addr);
17245 else switch (op_code)
17247 case DW_LNS_extended_op:
17248 extended_len = read_unsigned_leb128 (abfd, line_ptr,
17250 line_ptr += bytes_read;
17251 extended_end = line_ptr + extended_len;
17252 extended_op = read_1_byte (abfd, line_ptr);
17254 switch (extended_op)
17256 case DW_LNE_end_sequence:
17257 p_record_line = record_line;
17260 case DW_LNE_set_address:
17261 address = read_address (abfd, line_ptr, cu, &bytes_read);
17263 if (address == 0 && !dwarf2_per_objfile->has_section_at_zero)
17265 /* This line table is for a function which has been
17266 GCd by the linker. Ignore it. PR gdb/12528 */
17269 = line_ptr - get_debug_line_section (cu)->buffer;
17271 complaint (&symfile_complaints,
17272 _(".debug_line address at offset 0x%lx is 0 "
17274 line_offset, objfile_name (objfile));
17275 p_record_line = noop_record_line;
17279 line_ptr += bytes_read;
17280 address += baseaddr;
17282 case DW_LNE_define_file:
17284 const char *cur_file;
17285 unsigned int dir_index, mod_time, length;
17287 cur_file = read_direct_string (abfd, line_ptr,
17289 line_ptr += bytes_read;
17291 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17292 line_ptr += bytes_read;
17294 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17295 line_ptr += bytes_read;
17297 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17298 line_ptr += bytes_read;
17299 add_file_name (lh, cur_file, dir_index, mod_time, length);
17302 case DW_LNE_set_discriminator:
17303 /* The discriminator is not interesting to the debugger;
17305 line_ptr = extended_end;
17308 complaint (&symfile_complaints,
17309 _("mangled .debug_line section"));
17312 /* Make sure that we parsed the extended op correctly. If e.g.
17313 we expected a different address size than the producer used,
17314 we may have read the wrong number of bytes. */
17315 if (line_ptr != extended_end)
17317 complaint (&symfile_complaints,
17318 _("mangled .debug_line section"));
17323 if (lh->num_file_names < file || file == 0)
17324 dwarf2_debug_line_missing_file_complaint ();
17327 lh->file_names[file - 1].included_p = 1;
17328 if (!decode_for_pst_p && is_stmt)
17330 if (last_subfile != current_subfile)
17332 addr = gdbarch_addr_bits_remove (gdbarch, address);
17334 (*p_record_line) (last_subfile, 0, addr);
17335 last_subfile = current_subfile;
17337 addr = gdbarch_addr_bits_remove (gdbarch, address);
17338 (*p_record_line) (current_subfile, line, addr);
17343 case DW_LNS_advance_pc:
17346 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17348 address += (((op_index + adjust)
17349 / lh->maximum_ops_per_instruction)
17350 * lh->minimum_instruction_length);
17351 op_index = ((op_index + adjust)
17352 % lh->maximum_ops_per_instruction);
17353 line_ptr += bytes_read;
17356 case DW_LNS_advance_line:
17357 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
17358 line_ptr += bytes_read;
17360 case DW_LNS_set_file:
17362 /* The arrays lh->include_dirs and lh->file_names are
17363 0-based, but the directory and file name numbers in
17364 the statement program are 1-based. */
17365 struct file_entry *fe;
17366 const char *dir = NULL;
17368 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17369 line_ptr += bytes_read;
17370 if (lh->num_file_names < file || file == 0)
17371 dwarf2_debug_line_missing_file_complaint ();
17374 fe = &lh->file_names[file - 1];
17376 dir = lh->include_dirs[fe->dir_index - 1];
17377 if (!decode_for_pst_p)
17379 last_subfile = current_subfile;
17380 dwarf2_start_subfile (fe->name, dir, comp_dir);
17385 case DW_LNS_set_column:
17386 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17387 line_ptr += bytes_read;
17389 case DW_LNS_negate_stmt:
17390 is_stmt = (!is_stmt);
17392 case DW_LNS_set_basic_block:
17395 /* Add to the address register of the state machine the
17396 address increment value corresponding to special opcode
17397 255. I.e., this value is scaled by the minimum
17398 instruction length since special opcode 255 would have
17399 scaled the increment. */
17400 case DW_LNS_const_add_pc:
17402 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
17404 address += (((op_index + adjust)
17405 / lh->maximum_ops_per_instruction)
17406 * lh->minimum_instruction_length);
17407 op_index = ((op_index + adjust)
17408 % lh->maximum_ops_per_instruction);
17411 case DW_LNS_fixed_advance_pc:
17412 address += read_2_bytes (abfd, line_ptr);
17418 /* Unknown standard opcode, ignore it. */
17421 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
17423 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17424 line_ptr += bytes_read;
17429 if (lh->num_file_names < file || file == 0)
17430 dwarf2_debug_line_missing_file_complaint ();
17433 lh->file_names[file - 1].included_p = 1;
17434 if (!decode_for_pst_p)
17436 addr = gdbarch_addr_bits_remove (gdbarch, address);
17437 (*p_record_line) (current_subfile, 0, addr);
17443 /* Decode the Line Number Program (LNP) for the given line_header
17444 structure and CU. The actual information extracted and the type
17445 of structures created from the LNP depends on the value of PST.
17447 1. If PST is NULL, then this procedure uses the data from the program
17448 to create all necessary symbol tables, and their linetables.
17450 2. If PST is not NULL, this procedure reads the program to determine
17451 the list of files included by the unit represented by PST, and
17452 builds all the associated partial symbol tables.
17454 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17455 It is used for relative paths in the line table.
17456 NOTE: When processing partial symtabs (pst != NULL),
17457 comp_dir == pst->dirname.
17459 NOTE: It is important that psymtabs have the same file name (via strcmp)
17460 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17461 symtab we don't use it in the name of the psymtabs we create.
17462 E.g. expand_line_sal requires this when finding psymtabs to expand.
17463 A good testcase for this is mb-inline.exp. */
17466 dwarf_decode_lines (struct line_header *lh, const char *comp_dir,
17467 struct dwarf2_cu *cu, struct partial_symtab *pst,
17468 int want_line_info)
17470 struct objfile *objfile = cu->objfile;
17471 const int decode_for_pst_p = (pst != NULL);
17472 struct subfile *first_subfile = current_subfile;
17474 if (want_line_info)
17475 dwarf_decode_lines_1 (lh, comp_dir, cu, pst);
17477 if (decode_for_pst_p)
17481 /* Now that we're done scanning the Line Header Program, we can
17482 create the psymtab of each included file. */
17483 for (file_index = 0; file_index < lh->num_file_names; file_index++)
17484 if (lh->file_names[file_index].included_p == 1)
17486 const char *include_name =
17487 psymtab_include_file_name (lh, file_index, pst, comp_dir);
17488 if (include_name != NULL)
17489 dwarf2_create_include_psymtab (include_name, pst, objfile);
17494 /* Make sure a symtab is created for every file, even files
17495 which contain only variables (i.e. no code with associated
17499 for (i = 0; i < lh->num_file_names; i++)
17501 const char *dir = NULL;
17502 struct file_entry *fe;
17504 fe = &lh->file_names[i];
17506 dir = lh->include_dirs[fe->dir_index - 1];
17507 dwarf2_start_subfile (fe->name, dir, comp_dir);
17509 /* Skip the main file; we don't need it, and it must be
17510 allocated last, so that it will show up before the
17511 non-primary symtabs in the objfile's symtab list. */
17512 if (current_subfile == first_subfile)
17515 if (current_subfile->symtab == NULL)
17516 current_subfile->symtab = allocate_symtab (current_subfile->name,
17518 fe->symtab = current_subfile->symtab;
17523 /* Start a subfile for DWARF. FILENAME is the name of the file and
17524 DIRNAME the name of the source directory which contains FILENAME
17525 or NULL if not known. COMP_DIR is the compilation directory for the
17526 linetable's compilation unit or NULL if not known.
17527 This routine tries to keep line numbers from identical absolute and
17528 relative file names in a common subfile.
17530 Using the `list' example from the GDB testsuite, which resides in
17531 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17532 of /srcdir/list0.c yields the following debugging information for list0.c:
17534 DW_AT_name: /srcdir/list0.c
17535 DW_AT_comp_dir: /compdir
17536 files.files[0].name: list0.h
17537 files.files[0].dir: /srcdir
17538 files.files[1].name: list0.c
17539 files.files[1].dir: /srcdir
17541 The line number information for list0.c has to end up in a single
17542 subfile, so that `break /srcdir/list0.c:1' works as expected.
17543 start_subfile will ensure that this happens provided that we pass the
17544 concatenation of files.files[1].dir and files.files[1].name as the
17548 dwarf2_start_subfile (const char *filename, const char *dirname,
17549 const char *comp_dir)
17553 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
17554 `start_symtab' will always pass the contents of DW_AT_comp_dir as
17555 second argument to start_subfile. To be consistent, we do the
17556 same here. In order not to lose the line information directory,
17557 we concatenate it to the filename when it makes sense.
17558 Note that the Dwarf3 standard says (speaking of filenames in line
17559 information): ``The directory index is ignored for file names
17560 that represent full path names''. Thus ignoring dirname in the
17561 `else' branch below isn't an issue. */
17563 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
17565 copy = concat (dirname, SLASH_STRING, filename, (char *)NULL);
17569 start_subfile (filename, comp_dir);
17575 /* Start a symtab for DWARF.
17576 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17579 dwarf2_start_symtab (struct dwarf2_cu *cu,
17580 const char *name, const char *comp_dir, CORE_ADDR low_pc)
17582 start_symtab (name, comp_dir, low_pc);
17583 record_debugformat ("DWARF 2");
17584 record_producer (cu->producer);
17586 /* We assume that we're processing GCC output. */
17587 processing_gcc_compilation = 2;
17589 cu->processing_has_namespace_info = 0;
17593 var_decode_location (struct attribute *attr, struct symbol *sym,
17594 struct dwarf2_cu *cu)
17596 struct objfile *objfile = cu->objfile;
17597 struct comp_unit_head *cu_header = &cu->header;
17599 /* NOTE drow/2003-01-30: There used to be a comment and some special
17600 code here to turn a symbol with DW_AT_external and a
17601 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
17602 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
17603 with some versions of binutils) where shared libraries could have
17604 relocations against symbols in their debug information - the
17605 minimal symbol would have the right address, but the debug info
17606 would not. It's no longer necessary, because we will explicitly
17607 apply relocations when we read in the debug information now. */
17609 /* A DW_AT_location attribute with no contents indicates that a
17610 variable has been optimized away. */
17611 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
17613 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
17617 /* Handle one degenerate form of location expression specially, to
17618 preserve GDB's previous behavior when section offsets are
17619 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
17620 then mark this symbol as LOC_STATIC. */
17622 if (attr_form_is_block (attr)
17623 && ((DW_BLOCK (attr)->data[0] == DW_OP_addr
17624 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size)
17625 || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index
17626 && (DW_BLOCK (attr)->size
17627 == 1 + leb128_size (&DW_BLOCK (attr)->data[1])))))
17629 unsigned int dummy;
17631 if (DW_BLOCK (attr)->data[0] == DW_OP_addr)
17632 SYMBOL_VALUE_ADDRESS (sym) =
17633 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
17635 SYMBOL_VALUE_ADDRESS (sym) =
17636 read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy);
17637 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
17638 fixup_symbol_section (sym, objfile);
17639 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
17640 SYMBOL_SECTION (sym));
17644 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
17645 expression evaluator, and use LOC_COMPUTED only when necessary
17646 (i.e. when the value of a register or memory location is
17647 referenced, or a thread-local block, etc.). Then again, it might
17648 not be worthwhile. I'm assuming that it isn't unless performance
17649 or memory numbers show me otherwise. */
17651 dwarf2_symbol_mark_computed (attr, sym, cu, 0);
17653 if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist)
17654 cu->has_loclist = 1;
17657 /* Given a pointer to a DWARF information entry, figure out if we need
17658 to make a symbol table entry for it, and if so, create a new entry
17659 and return a pointer to it.
17660 If TYPE is NULL, determine symbol type from the die, otherwise
17661 used the passed type.
17662 If SPACE is not NULL, use it to hold the new symbol. If it is
17663 NULL, allocate a new symbol on the objfile's obstack. */
17665 static struct symbol *
17666 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
17667 struct symbol *space)
17669 struct objfile *objfile = cu->objfile;
17670 struct symbol *sym = NULL;
17672 struct attribute *attr = NULL;
17673 struct attribute *attr2 = NULL;
17674 CORE_ADDR baseaddr;
17675 struct pending **list_to_add = NULL;
17677 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
17679 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
17681 name = dwarf2_name (die, cu);
17684 const char *linkagename;
17685 int suppress_add = 0;
17690 sym = allocate_symbol (objfile);
17691 OBJSTAT (objfile, n_syms++);
17693 /* Cache this symbol's name and the name's demangled form (if any). */
17694 SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack);
17695 linkagename = dwarf2_physname (name, die, cu);
17696 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
17698 /* Fortran does not have mangling standard and the mangling does differ
17699 between gfortran, iFort etc. */
17700 if (cu->language == language_fortran
17701 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
17702 symbol_set_demangled_name (&(sym->ginfo),
17703 dwarf2_full_name (name, die, cu),
17706 /* Default assumptions.
17707 Use the passed type or decode it from the die. */
17708 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
17709 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
17711 SYMBOL_TYPE (sym) = type;
17713 SYMBOL_TYPE (sym) = die_type (die, cu);
17714 attr = dwarf2_attr (die,
17715 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
17719 SYMBOL_LINE (sym) = DW_UNSND (attr);
17722 attr = dwarf2_attr (die,
17723 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
17727 int file_index = DW_UNSND (attr);
17729 if (cu->line_header == NULL
17730 || file_index > cu->line_header->num_file_names)
17731 complaint (&symfile_complaints,
17732 _("file index out of range"));
17733 else if (file_index > 0)
17735 struct file_entry *fe;
17737 fe = &cu->line_header->file_names[file_index - 1];
17738 SYMBOL_SYMTAB (sym) = fe->symtab;
17745 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
17747 SYMBOL_VALUE_ADDRESS (sym)
17748 = attr_value_as_address (attr) + baseaddr;
17749 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
17750 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
17751 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
17752 add_symbol_to_list (sym, cu->list_in_scope);
17754 case DW_TAG_subprogram:
17755 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17757 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
17758 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17759 if ((attr2 && (DW_UNSND (attr2) != 0))
17760 || cu->language == language_ada)
17762 /* Subprograms marked external are stored as a global symbol.
17763 Ada subprograms, whether marked external or not, are always
17764 stored as a global symbol, because we want to be able to
17765 access them globally. For instance, we want to be able
17766 to break on a nested subprogram without having to
17767 specify the context. */
17768 list_to_add = &global_symbols;
17772 list_to_add = cu->list_in_scope;
17775 case DW_TAG_inlined_subroutine:
17776 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17778 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
17779 SYMBOL_INLINED (sym) = 1;
17780 list_to_add = cu->list_in_scope;
17782 case DW_TAG_template_value_param:
17784 /* Fall through. */
17785 case DW_TAG_constant:
17786 case DW_TAG_variable:
17787 case DW_TAG_member:
17788 /* Compilation with minimal debug info may result in
17789 variables with missing type entries. Change the
17790 misleading `void' type to something sensible. */
17791 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
17793 = objfile_type (objfile)->nodebug_data_symbol;
17795 attr = dwarf2_attr (die, DW_AT_const_value, cu);
17796 /* In the case of DW_TAG_member, we should only be called for
17797 static const members. */
17798 if (die->tag == DW_TAG_member)
17800 /* dwarf2_add_field uses die_is_declaration,
17801 so we do the same. */
17802 gdb_assert (die_is_declaration (die, cu));
17807 dwarf2_const_value (attr, sym, cu);
17808 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17811 if (attr2 && (DW_UNSND (attr2) != 0))
17812 list_to_add = &global_symbols;
17814 list_to_add = cu->list_in_scope;
17818 attr = dwarf2_attr (die, DW_AT_location, cu);
17821 var_decode_location (attr, sym, cu);
17822 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17824 /* Fortran explicitly imports any global symbols to the local
17825 scope by DW_TAG_common_block. */
17826 if (cu->language == language_fortran && die->parent
17827 && die->parent->tag == DW_TAG_common_block)
17830 if (SYMBOL_CLASS (sym) == LOC_STATIC
17831 && SYMBOL_VALUE_ADDRESS (sym) == 0
17832 && !dwarf2_per_objfile->has_section_at_zero)
17834 /* When a static variable is eliminated by the linker,
17835 the corresponding debug information is not stripped
17836 out, but the variable address is set to null;
17837 do not add such variables into symbol table. */
17839 else if (attr2 && (DW_UNSND (attr2) != 0))
17841 /* Workaround gfortran PR debug/40040 - it uses
17842 DW_AT_location for variables in -fPIC libraries which may
17843 get overriden by other libraries/executable and get
17844 a different address. Resolve it by the minimal symbol
17845 which may come from inferior's executable using copy
17846 relocation. Make this workaround only for gfortran as for
17847 other compilers GDB cannot guess the minimal symbol
17848 Fortran mangling kind. */
17849 if (cu->language == language_fortran && die->parent
17850 && die->parent->tag == DW_TAG_module
17852 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
17853 SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED;
17855 /* A variable with DW_AT_external is never static,
17856 but it may be block-scoped. */
17857 list_to_add = (cu->list_in_scope == &file_symbols
17858 ? &global_symbols : cu->list_in_scope);
17861 list_to_add = cu->list_in_scope;
17865 /* We do not know the address of this symbol.
17866 If it is an external symbol and we have type information
17867 for it, enter the symbol as a LOC_UNRESOLVED symbol.
17868 The address of the variable will then be determined from
17869 the minimal symbol table whenever the variable is
17871 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17873 /* Fortran explicitly imports any global symbols to the local
17874 scope by DW_TAG_common_block. */
17875 if (cu->language == language_fortran && die->parent
17876 && die->parent->tag == DW_TAG_common_block)
17878 /* SYMBOL_CLASS doesn't matter here because
17879 read_common_block is going to reset it. */
17881 list_to_add = cu->list_in_scope;
17883 else if (attr2 && (DW_UNSND (attr2) != 0)
17884 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
17886 /* A variable with DW_AT_external is never static, but it
17887 may be block-scoped. */
17888 list_to_add = (cu->list_in_scope == &file_symbols
17889 ? &global_symbols : cu->list_in_scope);
17891 SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED;
17893 else if (!die_is_declaration (die, cu))
17895 /* Use the default LOC_OPTIMIZED_OUT class. */
17896 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
17898 list_to_add = cu->list_in_scope;
17902 case DW_TAG_formal_parameter:
17903 /* If we are inside a function, mark this as an argument. If
17904 not, we might be looking at an argument to an inlined function
17905 when we do not have enough information to show inlined frames;
17906 pretend it's a local variable in that case so that the user can
17908 if (context_stack_depth > 0
17909 && context_stack[context_stack_depth - 1].name != NULL)
17910 SYMBOL_IS_ARGUMENT (sym) = 1;
17911 attr = dwarf2_attr (die, DW_AT_location, cu);
17914 var_decode_location (attr, sym, cu);
17916 attr = dwarf2_attr (die, DW_AT_const_value, cu);
17919 dwarf2_const_value (attr, sym, cu);
17922 list_to_add = cu->list_in_scope;
17924 case DW_TAG_unspecified_parameters:
17925 /* From varargs functions; gdb doesn't seem to have any
17926 interest in this information, so just ignore it for now.
17929 case DW_TAG_template_type_param:
17931 /* Fall through. */
17932 case DW_TAG_class_type:
17933 case DW_TAG_interface_type:
17934 case DW_TAG_structure_type:
17935 case DW_TAG_union_type:
17936 case DW_TAG_set_type:
17937 case DW_TAG_enumeration_type:
17938 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17939 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
17942 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
17943 really ever be static objects: otherwise, if you try
17944 to, say, break of a class's method and you're in a file
17945 which doesn't mention that class, it won't work unless
17946 the check for all static symbols in lookup_symbol_aux
17947 saves you. See the OtherFileClass tests in
17948 gdb.c++/namespace.exp. */
17952 list_to_add = (cu->list_in_scope == &file_symbols
17953 && (cu->language == language_cplus
17954 || cu->language == language_java)
17955 ? &global_symbols : cu->list_in_scope);
17957 /* The semantics of C++ state that "struct foo {
17958 ... }" also defines a typedef for "foo". A Java
17959 class declaration also defines a typedef for the
17961 if (cu->language == language_cplus
17962 || cu->language == language_java
17963 || cu->language == language_ada)
17965 /* The symbol's name is already allocated along
17966 with this objfile, so we don't need to
17967 duplicate it for the type. */
17968 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
17969 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
17974 case DW_TAG_typedef:
17975 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17976 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
17977 list_to_add = cu->list_in_scope;
17979 case DW_TAG_base_type:
17980 case DW_TAG_subrange_type:
17981 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17982 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
17983 list_to_add = cu->list_in_scope;
17985 case DW_TAG_enumerator:
17986 attr = dwarf2_attr (die, DW_AT_const_value, cu);
17989 dwarf2_const_value (attr, sym, cu);
17992 /* NOTE: carlton/2003-11-10: See comment above in the
17993 DW_TAG_class_type, etc. block. */
17995 list_to_add = (cu->list_in_scope == &file_symbols
17996 && (cu->language == language_cplus
17997 || cu->language == language_java)
17998 ? &global_symbols : cu->list_in_scope);
18001 case DW_TAG_imported_declaration:
18002 case DW_TAG_namespace:
18003 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
18004 list_to_add = &global_symbols;
18006 case DW_TAG_module:
18007 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
18008 SYMBOL_DOMAIN (sym) = MODULE_DOMAIN;
18009 list_to_add = &global_symbols;
18011 case DW_TAG_common_block:
18012 SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK;
18013 SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN;
18014 add_symbol_to_list (sym, cu->list_in_scope);
18017 /* Not a tag we recognize. Hopefully we aren't processing
18018 trash data, but since we must specifically ignore things
18019 we don't recognize, there is nothing else we should do at
18021 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
18022 dwarf_tag_name (die->tag));
18028 sym->hash_next = objfile->template_symbols;
18029 objfile->template_symbols = sym;
18030 list_to_add = NULL;
18033 if (list_to_add != NULL)
18034 add_symbol_to_list (sym, list_to_add);
18036 /* For the benefit of old versions of GCC, check for anonymous
18037 namespaces based on the demangled name. */
18038 if (!cu->processing_has_namespace_info
18039 && cu->language == language_cplus)
18040 cp_scan_for_anonymous_namespaces (sym, objfile);
18045 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18047 static struct symbol *
18048 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
18050 return new_symbol_full (die, type, cu, NULL);
18053 /* Given an attr with a DW_FORM_dataN value in host byte order,
18054 zero-extend it as appropriate for the symbol's type. The DWARF
18055 standard (v4) is not entirely clear about the meaning of using
18056 DW_FORM_dataN for a constant with a signed type, where the type is
18057 wider than the data. The conclusion of a discussion on the DWARF
18058 list was that this is unspecified. We choose to always zero-extend
18059 because that is the interpretation long in use by GCC. */
18062 dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack,
18063 struct dwarf2_cu *cu, LONGEST *value, int bits)
18065 struct objfile *objfile = cu->objfile;
18066 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
18067 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
18068 LONGEST l = DW_UNSND (attr);
18070 if (bits < sizeof (*value) * 8)
18072 l &= ((LONGEST) 1 << bits) - 1;
18075 else if (bits == sizeof (*value) * 8)
18079 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
18080 store_unsigned_integer (bytes, bits / 8, byte_order, l);
18087 /* Read a constant value from an attribute. Either set *VALUE, or if
18088 the value does not fit in *VALUE, set *BYTES - either already
18089 allocated on the objfile obstack, or newly allocated on OBSTACK,
18090 or, set *BATON, if we translated the constant to a location
18094 dwarf2_const_value_attr (const struct attribute *attr, struct type *type,
18095 const char *name, struct obstack *obstack,
18096 struct dwarf2_cu *cu,
18097 LONGEST *value, const gdb_byte **bytes,
18098 struct dwarf2_locexpr_baton **baton)
18100 struct objfile *objfile = cu->objfile;
18101 struct comp_unit_head *cu_header = &cu->header;
18102 struct dwarf_block *blk;
18103 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
18104 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
18110 switch (attr->form)
18113 case DW_FORM_GNU_addr_index:
18117 if (TYPE_LENGTH (type) != cu_header->addr_size)
18118 dwarf2_const_value_length_mismatch_complaint (name,
18119 cu_header->addr_size,
18120 TYPE_LENGTH (type));
18121 /* Symbols of this form are reasonably rare, so we just
18122 piggyback on the existing location code rather than writing
18123 a new implementation of symbol_computed_ops. */
18124 *baton = obstack_alloc (obstack, sizeof (struct dwarf2_locexpr_baton));
18125 (*baton)->per_cu = cu->per_cu;
18126 gdb_assert ((*baton)->per_cu);
18128 (*baton)->size = 2 + cu_header->addr_size;
18129 data = obstack_alloc (obstack, (*baton)->size);
18130 (*baton)->data = data;
18132 data[0] = DW_OP_addr;
18133 store_unsigned_integer (&data[1], cu_header->addr_size,
18134 byte_order, DW_ADDR (attr));
18135 data[cu_header->addr_size + 1] = DW_OP_stack_value;
18138 case DW_FORM_string:
18140 case DW_FORM_GNU_str_index:
18141 case DW_FORM_GNU_strp_alt:
18142 /* DW_STRING is already allocated on the objfile obstack, point
18144 *bytes = (const gdb_byte *) DW_STRING (attr);
18146 case DW_FORM_block1:
18147 case DW_FORM_block2:
18148 case DW_FORM_block4:
18149 case DW_FORM_block:
18150 case DW_FORM_exprloc:
18151 blk = DW_BLOCK (attr);
18152 if (TYPE_LENGTH (type) != blk->size)
18153 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
18154 TYPE_LENGTH (type));
18155 *bytes = blk->data;
18158 /* The DW_AT_const_value attributes are supposed to carry the
18159 symbol's value "represented as it would be on the target
18160 architecture." By the time we get here, it's already been
18161 converted to host endianness, so we just need to sign- or
18162 zero-extend it as appropriate. */
18163 case DW_FORM_data1:
18164 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8);
18166 case DW_FORM_data2:
18167 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16);
18169 case DW_FORM_data4:
18170 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32);
18172 case DW_FORM_data8:
18173 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64);
18176 case DW_FORM_sdata:
18177 *value = DW_SND (attr);
18180 case DW_FORM_udata:
18181 *value = DW_UNSND (attr);
18185 complaint (&symfile_complaints,
18186 _("unsupported const value attribute form: '%s'"),
18187 dwarf_form_name (attr->form));
18194 /* Copy constant value from an attribute to a symbol. */
18197 dwarf2_const_value (const struct attribute *attr, struct symbol *sym,
18198 struct dwarf2_cu *cu)
18200 struct objfile *objfile = cu->objfile;
18201 struct comp_unit_head *cu_header = &cu->header;
18203 const gdb_byte *bytes;
18204 struct dwarf2_locexpr_baton *baton;
18206 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
18207 SYMBOL_PRINT_NAME (sym),
18208 &objfile->objfile_obstack, cu,
18209 &value, &bytes, &baton);
18213 SYMBOL_LOCATION_BATON (sym) = baton;
18214 SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index;
18216 else if (bytes != NULL)
18218 SYMBOL_VALUE_BYTES (sym) = bytes;
18219 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
18223 SYMBOL_VALUE (sym) = value;
18224 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
18228 /* Return the type of the die in question using its DW_AT_type attribute. */
18230 static struct type *
18231 die_type (struct die_info *die, struct dwarf2_cu *cu)
18233 struct attribute *type_attr;
18235 type_attr = dwarf2_attr (die, DW_AT_type, cu);
18238 /* A missing DW_AT_type represents a void type. */
18239 return objfile_type (cu->objfile)->builtin_void;
18242 return lookup_die_type (die, type_attr, cu);
18245 /* True iff CU's producer generates GNAT Ada auxiliary information
18246 that allows to find parallel types through that information instead
18247 of having to do expensive parallel lookups by type name. */
18250 need_gnat_info (struct dwarf2_cu *cu)
18252 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18253 of GNAT produces this auxiliary information, without any indication
18254 that it is produced. Part of enhancing the FSF version of GNAT
18255 to produce that information will be to put in place an indicator
18256 that we can use in order to determine whether the descriptive type
18257 info is available or not. One suggestion that has been made is
18258 to use a new attribute, attached to the CU die. For now, assume
18259 that the descriptive type info is not available. */
18263 /* Return the auxiliary type of the die in question using its
18264 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18265 attribute is not present. */
18267 static struct type *
18268 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
18270 struct attribute *type_attr;
18272 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
18276 return lookup_die_type (die, type_attr, cu);
18279 /* If DIE has a descriptive_type attribute, then set the TYPE's
18280 descriptive type accordingly. */
18283 set_descriptive_type (struct type *type, struct die_info *die,
18284 struct dwarf2_cu *cu)
18286 struct type *descriptive_type = die_descriptive_type (die, cu);
18288 if (descriptive_type)
18290 ALLOCATE_GNAT_AUX_TYPE (type);
18291 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
18295 /* Return the containing type of the die in question using its
18296 DW_AT_containing_type attribute. */
18298 static struct type *
18299 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
18301 struct attribute *type_attr;
18303 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
18305 error (_("Dwarf Error: Problem turning containing type into gdb type "
18306 "[in module %s]"), objfile_name (cu->objfile));
18308 return lookup_die_type (die, type_attr, cu);
18311 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18313 static struct type *
18314 build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die)
18316 struct objfile *objfile = dwarf2_per_objfile->objfile;
18317 char *message, *saved;
18319 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18320 objfile_name (objfile),
18321 cu->header.offset.sect_off,
18322 die->offset.sect_off);
18323 saved = obstack_copy0 (&objfile->objfile_obstack,
18324 message, strlen (message));
18327 return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile);
18330 /* Look up the type of DIE in CU using its type attribute ATTR.
18331 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18332 DW_AT_containing_type.
18333 If there is no type substitute an error marker. */
18335 static struct type *
18336 lookup_die_type (struct die_info *die, const struct attribute *attr,
18337 struct dwarf2_cu *cu)
18339 struct objfile *objfile = cu->objfile;
18340 struct type *this_type;
18342 gdb_assert (attr->name == DW_AT_type
18343 || attr->name == DW_AT_GNAT_descriptive_type
18344 || attr->name == DW_AT_containing_type);
18346 /* First see if we have it cached. */
18348 if (attr->form == DW_FORM_GNU_ref_alt)
18350 struct dwarf2_per_cu_data *per_cu;
18351 sect_offset offset = dwarf2_get_ref_die_offset (attr);
18353 per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile);
18354 this_type = get_die_type_at_offset (offset, per_cu);
18356 else if (attr_form_is_ref (attr))
18358 sect_offset offset = dwarf2_get_ref_die_offset (attr);
18360 this_type = get_die_type_at_offset (offset, cu->per_cu);
18362 else if (attr->form == DW_FORM_ref_sig8)
18364 ULONGEST signature = DW_SIGNATURE (attr);
18366 return get_signatured_type (die, signature, cu);
18370 complaint (&symfile_complaints,
18371 _("Dwarf Error: Bad type attribute %s in DIE"
18372 " at 0x%x [in module %s]"),
18373 dwarf_attr_name (attr->name), die->offset.sect_off,
18374 objfile_name (objfile));
18375 return build_error_marker_type (cu, die);
18378 /* If not cached we need to read it in. */
18380 if (this_type == NULL)
18382 struct die_info *type_die = NULL;
18383 struct dwarf2_cu *type_cu = cu;
18385 if (attr_form_is_ref (attr))
18386 type_die = follow_die_ref (die, attr, &type_cu);
18387 if (type_die == NULL)
18388 return build_error_marker_type (cu, die);
18389 /* If we find the type now, it's probably because the type came
18390 from an inter-CU reference and the type's CU got expanded before
18392 this_type = read_type_die (type_die, type_cu);
18395 /* If we still don't have a type use an error marker. */
18397 if (this_type == NULL)
18398 return build_error_marker_type (cu, die);
18403 /* Return the type in DIE, CU.
18404 Returns NULL for invalid types.
18406 This first does a lookup in die_type_hash,
18407 and only reads the die in if necessary.
18409 NOTE: This can be called when reading in partial or full symbols. */
18411 static struct type *
18412 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
18414 struct type *this_type;
18416 this_type = get_die_type (die, cu);
18420 return read_type_die_1 (die, cu);
18423 /* Read the type in DIE, CU.
18424 Returns NULL for invalid types. */
18426 static struct type *
18427 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
18429 struct type *this_type = NULL;
18433 case DW_TAG_class_type:
18434 case DW_TAG_interface_type:
18435 case DW_TAG_structure_type:
18436 case DW_TAG_union_type:
18437 this_type = read_structure_type (die, cu);
18439 case DW_TAG_enumeration_type:
18440 this_type = read_enumeration_type (die, cu);
18442 case DW_TAG_subprogram:
18443 case DW_TAG_subroutine_type:
18444 case DW_TAG_inlined_subroutine:
18445 this_type = read_subroutine_type (die, cu);
18447 case DW_TAG_array_type:
18448 this_type = read_array_type (die, cu);
18450 case DW_TAG_set_type:
18451 this_type = read_set_type (die, cu);
18453 case DW_TAG_pointer_type:
18454 this_type = read_tag_pointer_type (die, cu);
18456 case DW_TAG_ptr_to_member_type:
18457 this_type = read_tag_ptr_to_member_type (die, cu);
18459 case DW_TAG_reference_type:
18460 this_type = read_tag_reference_type (die, cu);
18462 case DW_TAG_const_type:
18463 this_type = read_tag_const_type (die, cu);
18465 case DW_TAG_volatile_type:
18466 this_type = read_tag_volatile_type (die, cu);
18468 case DW_TAG_restrict_type:
18469 this_type = read_tag_restrict_type (die, cu);
18471 case DW_TAG_string_type:
18472 this_type = read_tag_string_type (die, cu);
18474 case DW_TAG_typedef:
18475 this_type = read_typedef (die, cu);
18477 case DW_TAG_subrange_type:
18478 this_type = read_subrange_type (die, cu);
18480 case DW_TAG_base_type:
18481 this_type = read_base_type (die, cu);
18483 case DW_TAG_unspecified_type:
18484 this_type = read_unspecified_type (die, cu);
18486 case DW_TAG_namespace:
18487 this_type = read_namespace_type (die, cu);
18489 case DW_TAG_module:
18490 this_type = read_module_type (die, cu);
18493 complaint (&symfile_complaints,
18494 _("unexpected tag in read_type_die: '%s'"),
18495 dwarf_tag_name (die->tag));
18502 /* See if we can figure out if the class lives in a namespace. We do
18503 this by looking for a member function; its demangled name will
18504 contain namespace info, if there is any.
18505 Return the computed name or NULL.
18506 Space for the result is allocated on the objfile's obstack.
18507 This is the full-die version of guess_partial_die_structure_name.
18508 In this case we know DIE has no useful parent. */
18511 guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu)
18513 struct die_info *spec_die;
18514 struct dwarf2_cu *spec_cu;
18515 struct die_info *child;
18518 spec_die = die_specification (die, &spec_cu);
18519 if (spec_die != NULL)
18525 for (child = die->child;
18527 child = child->sibling)
18529 if (child->tag == DW_TAG_subprogram)
18531 struct attribute *attr;
18533 attr = dwarf2_attr (child, DW_AT_linkage_name, cu);
18535 attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu);
18539 = language_class_name_from_physname (cu->language_defn,
18543 if (actual_name != NULL)
18545 const char *die_name = dwarf2_name (die, cu);
18547 if (die_name != NULL
18548 && strcmp (die_name, actual_name) != 0)
18550 /* Strip off the class name from the full name.
18551 We want the prefix. */
18552 int die_name_len = strlen (die_name);
18553 int actual_name_len = strlen (actual_name);
18555 /* Test for '::' as a sanity check. */
18556 if (actual_name_len > die_name_len + 2
18557 && actual_name[actual_name_len
18558 - die_name_len - 1] == ':')
18560 obstack_copy0 (&cu->objfile->objfile_obstack,
18562 actual_name_len - die_name_len - 2);
18565 xfree (actual_name);
18574 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18575 prefix part in such case. See
18576 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18579 anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu)
18581 struct attribute *attr;
18584 if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type
18585 && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type)
18588 attr = dwarf2_attr (die, DW_AT_name, cu);
18589 if (attr != NULL && DW_STRING (attr) != NULL)
18592 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
18594 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
18595 if (attr == NULL || DW_STRING (attr) == NULL)
18598 /* dwarf2_name had to be already called. */
18599 gdb_assert (DW_STRING_IS_CANONICAL (attr));
18601 /* Strip the base name, keep any leading namespaces/classes. */
18602 base = strrchr (DW_STRING (attr), ':');
18603 if (base == NULL || base == DW_STRING (attr) || base[-1] != ':')
18606 return obstack_copy0 (&cu->objfile->objfile_obstack,
18607 DW_STRING (attr), &base[-1] - DW_STRING (attr));
18610 /* Return the name of the namespace/class that DIE is defined within,
18611 or "" if we can't tell. The caller should not xfree the result.
18613 For example, if we're within the method foo() in the following
18623 then determine_prefix on foo's die will return "N::C". */
18625 static const char *
18626 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
18628 struct die_info *parent, *spec_die;
18629 struct dwarf2_cu *spec_cu;
18630 struct type *parent_type;
18633 if (cu->language != language_cplus && cu->language != language_java
18634 && cu->language != language_fortran)
18637 retval = anonymous_struct_prefix (die, cu);
18641 /* We have to be careful in the presence of DW_AT_specification.
18642 For example, with GCC 3.4, given the code
18646 // Definition of N::foo.
18650 then we'll have a tree of DIEs like this:
18652 1: DW_TAG_compile_unit
18653 2: DW_TAG_namespace // N
18654 3: DW_TAG_subprogram // declaration of N::foo
18655 4: DW_TAG_subprogram // definition of N::foo
18656 DW_AT_specification // refers to die #3
18658 Thus, when processing die #4, we have to pretend that we're in
18659 the context of its DW_AT_specification, namely the contex of die
18662 spec_die = die_specification (die, &spec_cu);
18663 if (spec_die == NULL)
18664 parent = die->parent;
18667 parent = spec_die->parent;
18671 if (parent == NULL)
18673 else if (parent->building_fullname)
18676 const char *parent_name;
18678 /* It has been seen on RealView 2.2 built binaries,
18679 DW_TAG_template_type_param types actually _defined_ as
18680 children of the parent class:
18683 template class <class Enum> Class{};
18684 Class<enum E> class_e;
18686 1: DW_TAG_class_type (Class)
18687 2: DW_TAG_enumeration_type (E)
18688 3: DW_TAG_enumerator (enum1:0)
18689 3: DW_TAG_enumerator (enum2:1)
18691 2: DW_TAG_template_type_param
18692 DW_AT_type DW_FORM_ref_udata (E)
18694 Besides being broken debug info, it can put GDB into an
18695 infinite loop. Consider:
18697 When we're building the full name for Class<E>, we'll start
18698 at Class, and go look over its template type parameters,
18699 finding E. We'll then try to build the full name of E, and
18700 reach here. We're now trying to build the full name of E,
18701 and look over the parent DIE for containing scope. In the
18702 broken case, if we followed the parent DIE of E, we'd again
18703 find Class, and once again go look at its template type
18704 arguments, etc., etc. Simply don't consider such parent die
18705 as source-level parent of this die (it can't be, the language
18706 doesn't allow it), and break the loop here. */
18707 name = dwarf2_name (die, cu);
18708 parent_name = dwarf2_name (parent, cu);
18709 complaint (&symfile_complaints,
18710 _("template param type '%s' defined within parent '%s'"),
18711 name ? name : "<unknown>",
18712 parent_name ? parent_name : "<unknown>");
18716 switch (parent->tag)
18718 case DW_TAG_namespace:
18719 parent_type = read_type_die (parent, cu);
18720 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
18721 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
18722 Work around this problem here. */
18723 if (cu->language == language_cplus
18724 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
18726 /* We give a name to even anonymous namespaces. */
18727 return TYPE_TAG_NAME (parent_type);
18728 case DW_TAG_class_type:
18729 case DW_TAG_interface_type:
18730 case DW_TAG_structure_type:
18731 case DW_TAG_union_type:
18732 case DW_TAG_module:
18733 parent_type = read_type_die (parent, cu);
18734 if (TYPE_TAG_NAME (parent_type) != NULL)
18735 return TYPE_TAG_NAME (parent_type);
18737 /* An anonymous structure is only allowed non-static data
18738 members; no typedefs, no member functions, et cetera.
18739 So it does not need a prefix. */
18741 case DW_TAG_compile_unit:
18742 case DW_TAG_partial_unit:
18743 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
18744 if (cu->language == language_cplus
18745 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
18746 && die->child != NULL
18747 && (die->tag == DW_TAG_class_type
18748 || die->tag == DW_TAG_structure_type
18749 || die->tag == DW_TAG_union_type))
18751 char *name = guess_full_die_structure_name (die, cu);
18756 case DW_TAG_enumeration_type:
18757 parent_type = read_type_die (parent, cu);
18758 if (TYPE_DECLARED_CLASS (parent_type))
18760 if (TYPE_TAG_NAME (parent_type) != NULL)
18761 return TYPE_TAG_NAME (parent_type);
18764 /* Fall through. */
18766 return determine_prefix (parent, cu);
18770 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
18771 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
18772 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
18773 an obconcat, otherwise allocate storage for the result. The CU argument is
18774 used to determine the language and hence, the appropriate separator. */
18776 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
18779 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
18780 int physname, struct dwarf2_cu *cu)
18782 const char *lead = "";
18785 if (suffix == NULL || suffix[0] == '\0'
18786 || prefix == NULL || prefix[0] == '\0')
18788 else if (cu->language == language_java)
18790 else if (cu->language == language_fortran && physname)
18792 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
18793 DW_AT_MIPS_linkage_name is preferred and used instead. */
18801 if (prefix == NULL)
18803 if (suffix == NULL)
18809 = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
18811 strcpy (retval, lead);
18812 strcat (retval, prefix);
18813 strcat (retval, sep);
18814 strcat (retval, suffix);
18819 /* We have an obstack. */
18820 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
18824 /* Return sibling of die, NULL if no sibling. */
18826 static struct die_info *
18827 sibling_die (struct die_info *die)
18829 return die->sibling;
18832 /* Get name of a die, return NULL if not found. */
18834 static const char *
18835 dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu,
18836 struct obstack *obstack)
18838 if (name && cu->language == language_cplus)
18840 char *canon_name = cp_canonicalize_string (name);
18842 if (canon_name != NULL)
18844 if (strcmp (canon_name, name) != 0)
18845 name = obstack_copy0 (obstack, canon_name, strlen (canon_name));
18846 xfree (canon_name);
18853 /* Get name of a die, return NULL if not found. */
18855 static const char *
18856 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
18858 struct attribute *attr;
18860 attr = dwarf2_attr (die, DW_AT_name, cu);
18861 if ((!attr || !DW_STRING (attr))
18862 && die->tag != DW_TAG_class_type
18863 && die->tag != DW_TAG_interface_type
18864 && die->tag != DW_TAG_structure_type
18865 && die->tag != DW_TAG_union_type)
18870 case DW_TAG_compile_unit:
18871 case DW_TAG_partial_unit:
18872 /* Compilation units have a DW_AT_name that is a filename, not
18873 a source language identifier. */
18874 case DW_TAG_enumeration_type:
18875 case DW_TAG_enumerator:
18876 /* These tags always have simple identifiers already; no need
18877 to canonicalize them. */
18878 return DW_STRING (attr);
18880 case DW_TAG_subprogram:
18881 /* Java constructors will all be named "<init>", so return
18882 the class name when we see this special case. */
18883 if (cu->language == language_java
18884 && DW_STRING (attr) != NULL
18885 && strcmp (DW_STRING (attr), "<init>") == 0)
18887 struct dwarf2_cu *spec_cu = cu;
18888 struct die_info *spec_die;
18890 /* GCJ will output '<init>' for Java constructor names.
18891 For this special case, return the name of the parent class. */
18893 /* GCJ may output suprogram DIEs with AT_specification set.
18894 If so, use the name of the specified DIE. */
18895 spec_die = die_specification (die, &spec_cu);
18896 if (spec_die != NULL)
18897 return dwarf2_name (spec_die, spec_cu);
18902 if (die->tag == DW_TAG_class_type)
18903 return dwarf2_name (die, cu);
18905 while (die->tag != DW_TAG_compile_unit
18906 && die->tag != DW_TAG_partial_unit);
18910 case DW_TAG_class_type:
18911 case DW_TAG_interface_type:
18912 case DW_TAG_structure_type:
18913 case DW_TAG_union_type:
18914 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
18915 structures or unions. These were of the form "._%d" in GCC 4.1,
18916 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
18917 and GCC 4.4. We work around this problem by ignoring these. */
18918 if (attr && DW_STRING (attr)
18919 && (strncmp (DW_STRING (attr), "._", 2) == 0
18920 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0))
18923 /* GCC might emit a nameless typedef that has a linkage name. See
18924 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18925 if (!attr || DW_STRING (attr) == NULL)
18927 char *demangled = NULL;
18929 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
18931 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
18933 if (attr == NULL || DW_STRING (attr) == NULL)
18936 /* Avoid demangling DW_STRING (attr) the second time on a second
18937 call for the same DIE. */
18938 if (!DW_STRING_IS_CANONICAL (attr))
18939 demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES);
18945 /* FIXME: we already did this for the partial symbol... */
18946 DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack,
18947 demangled, strlen (demangled));
18948 DW_STRING_IS_CANONICAL (attr) = 1;
18951 /* Strip any leading namespaces/classes, keep only the base name.
18952 DW_AT_name for named DIEs does not contain the prefixes. */
18953 base = strrchr (DW_STRING (attr), ':');
18954 if (base && base > DW_STRING (attr) && base[-1] == ':')
18957 return DW_STRING (attr);
18966 if (!DW_STRING_IS_CANONICAL (attr))
18969 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
18970 &cu->objfile->objfile_obstack);
18971 DW_STRING_IS_CANONICAL (attr) = 1;
18973 return DW_STRING (attr);
18976 /* Return the die that this die in an extension of, or NULL if there
18977 is none. *EXT_CU is the CU containing DIE on input, and the CU
18978 containing the return value on output. */
18980 static struct die_info *
18981 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
18983 struct attribute *attr;
18985 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
18989 return follow_die_ref (die, attr, ext_cu);
18992 /* Convert a DIE tag into its string name. */
18994 static const char *
18995 dwarf_tag_name (unsigned tag)
18997 const char *name = get_DW_TAG_name (tag);
19000 return "DW_TAG_<unknown>";
19005 /* Convert a DWARF attribute code into its string name. */
19007 static const char *
19008 dwarf_attr_name (unsigned attr)
19012 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19013 if (attr == DW_AT_MIPS_fde)
19014 return "DW_AT_MIPS_fde";
19016 if (attr == DW_AT_HP_block_index)
19017 return "DW_AT_HP_block_index";
19020 name = get_DW_AT_name (attr);
19023 return "DW_AT_<unknown>";
19028 /* Convert a DWARF value form code into its string name. */
19030 static const char *
19031 dwarf_form_name (unsigned form)
19033 const char *name = get_DW_FORM_name (form);
19036 return "DW_FORM_<unknown>";
19042 dwarf_bool_name (unsigned mybool)
19050 /* Convert a DWARF type code into its string name. */
19052 static const char *
19053 dwarf_type_encoding_name (unsigned enc)
19055 const char *name = get_DW_ATE_name (enc);
19058 return "DW_ATE_<unknown>";
19064 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
19068 print_spaces (indent, f);
19069 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
19070 dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off);
19072 if (die->parent != NULL)
19074 print_spaces (indent, f);
19075 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
19076 die->parent->offset.sect_off);
19079 print_spaces (indent, f);
19080 fprintf_unfiltered (f, " has children: %s\n",
19081 dwarf_bool_name (die->child != NULL));
19083 print_spaces (indent, f);
19084 fprintf_unfiltered (f, " attributes:\n");
19086 for (i = 0; i < die->num_attrs; ++i)
19088 print_spaces (indent, f);
19089 fprintf_unfiltered (f, " %s (%s) ",
19090 dwarf_attr_name (die->attrs[i].name),
19091 dwarf_form_name (die->attrs[i].form));
19093 switch (die->attrs[i].form)
19096 case DW_FORM_GNU_addr_index:
19097 fprintf_unfiltered (f, "address: ");
19098 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
19100 case DW_FORM_block2:
19101 case DW_FORM_block4:
19102 case DW_FORM_block:
19103 case DW_FORM_block1:
19104 fprintf_unfiltered (f, "block: size %s",
19105 pulongest (DW_BLOCK (&die->attrs[i])->size));
19107 case DW_FORM_exprloc:
19108 fprintf_unfiltered (f, "expression: size %s",
19109 pulongest (DW_BLOCK (&die->attrs[i])->size));
19111 case DW_FORM_ref_addr:
19112 fprintf_unfiltered (f, "ref address: ");
19113 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
19115 case DW_FORM_GNU_ref_alt:
19116 fprintf_unfiltered (f, "alt ref address: ");
19117 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
19123 case DW_FORM_ref_udata:
19124 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
19125 (long) (DW_UNSND (&die->attrs[i])));
19127 case DW_FORM_data1:
19128 case DW_FORM_data2:
19129 case DW_FORM_data4:
19130 case DW_FORM_data8:
19131 case DW_FORM_udata:
19132 case DW_FORM_sdata:
19133 fprintf_unfiltered (f, "constant: %s",
19134 pulongest (DW_UNSND (&die->attrs[i])));
19136 case DW_FORM_sec_offset:
19137 fprintf_unfiltered (f, "section offset: %s",
19138 pulongest (DW_UNSND (&die->attrs[i])));
19140 case DW_FORM_ref_sig8:
19141 fprintf_unfiltered (f, "signature: %s",
19142 hex_string (DW_SIGNATURE (&die->attrs[i])));
19144 case DW_FORM_string:
19146 case DW_FORM_GNU_str_index:
19147 case DW_FORM_GNU_strp_alt:
19148 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
19149 DW_STRING (&die->attrs[i])
19150 ? DW_STRING (&die->attrs[i]) : "",
19151 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
19154 if (DW_UNSND (&die->attrs[i]))
19155 fprintf_unfiltered (f, "flag: TRUE");
19157 fprintf_unfiltered (f, "flag: FALSE");
19159 case DW_FORM_flag_present:
19160 fprintf_unfiltered (f, "flag: TRUE");
19162 case DW_FORM_indirect:
19163 /* The reader will have reduced the indirect form to
19164 the "base form" so this form should not occur. */
19165 fprintf_unfiltered (f,
19166 "unexpected attribute form: DW_FORM_indirect");
19169 fprintf_unfiltered (f, "unsupported attribute form: %d.",
19170 die->attrs[i].form);
19173 fprintf_unfiltered (f, "\n");
19178 dump_die_for_error (struct die_info *die)
19180 dump_die_shallow (gdb_stderr, 0, die);
19184 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
19186 int indent = level * 4;
19188 gdb_assert (die != NULL);
19190 if (level >= max_level)
19193 dump_die_shallow (f, indent, die);
19195 if (die->child != NULL)
19197 print_spaces (indent, f);
19198 fprintf_unfiltered (f, " Children:");
19199 if (level + 1 < max_level)
19201 fprintf_unfiltered (f, "\n");
19202 dump_die_1 (f, level + 1, max_level, die->child);
19206 fprintf_unfiltered (f,
19207 " [not printed, max nesting level reached]\n");
19211 if (die->sibling != NULL && level > 0)
19213 dump_die_1 (f, level, max_level, die->sibling);
19217 /* This is called from the pdie macro in gdbinit.in.
19218 It's not static so gcc will keep a copy callable from gdb. */
19221 dump_die (struct die_info *die, int max_level)
19223 dump_die_1 (gdb_stdlog, 0, max_level, die);
19227 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
19231 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off,
19237 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19241 dwarf2_get_ref_die_offset (const struct attribute *attr)
19243 sect_offset retval = { DW_UNSND (attr) };
19245 if (attr_form_is_ref (attr))
19248 retval.sect_off = 0;
19249 complaint (&symfile_complaints,
19250 _("unsupported die ref attribute form: '%s'"),
19251 dwarf_form_name (attr->form));
19255 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19256 * the value held by the attribute is not constant. */
19259 dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value)
19261 if (attr->form == DW_FORM_sdata)
19262 return DW_SND (attr);
19263 else if (attr->form == DW_FORM_udata
19264 || attr->form == DW_FORM_data1
19265 || attr->form == DW_FORM_data2
19266 || attr->form == DW_FORM_data4
19267 || attr->form == DW_FORM_data8)
19268 return DW_UNSND (attr);
19271 complaint (&symfile_complaints,
19272 _("Attribute value is not a constant (%s)"),
19273 dwarf_form_name (attr->form));
19274 return default_value;
19278 /* Follow reference or signature attribute ATTR of SRC_DIE.
19279 On entry *REF_CU is the CU of SRC_DIE.
19280 On exit *REF_CU is the CU of the result. */
19282 static struct die_info *
19283 follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr,
19284 struct dwarf2_cu **ref_cu)
19286 struct die_info *die;
19288 if (attr_form_is_ref (attr))
19289 die = follow_die_ref (src_die, attr, ref_cu);
19290 else if (attr->form == DW_FORM_ref_sig8)
19291 die = follow_die_sig (src_die, attr, ref_cu);
19294 dump_die_for_error (src_die);
19295 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19296 objfile_name ((*ref_cu)->objfile));
19302 /* Follow reference OFFSET.
19303 On entry *REF_CU is the CU of the source die referencing OFFSET.
19304 On exit *REF_CU is the CU of the result.
19305 Returns NULL if OFFSET is invalid. */
19307 static struct die_info *
19308 follow_die_offset (sect_offset offset, int offset_in_dwz,
19309 struct dwarf2_cu **ref_cu)
19311 struct die_info temp_die;
19312 struct dwarf2_cu *target_cu, *cu = *ref_cu;
19314 gdb_assert (cu->per_cu != NULL);
19318 if (cu->per_cu->is_debug_types)
19320 /* .debug_types CUs cannot reference anything outside their CU.
19321 If they need to, they have to reference a signatured type via
19322 DW_FORM_ref_sig8. */
19323 if (! offset_in_cu_p (&cu->header, offset))
19326 else if (offset_in_dwz != cu->per_cu->is_dwz
19327 || ! offset_in_cu_p (&cu->header, offset))
19329 struct dwarf2_per_cu_data *per_cu;
19331 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
19334 /* If necessary, add it to the queue and load its DIEs. */
19335 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
19336 load_full_comp_unit (per_cu, cu->language);
19338 target_cu = per_cu->cu;
19340 else if (cu->dies == NULL)
19342 /* We're loading full DIEs during partial symbol reading. */
19343 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
19344 load_full_comp_unit (cu->per_cu, language_minimal);
19347 *ref_cu = target_cu;
19348 temp_die.offset = offset;
19349 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off);
19352 /* Follow reference attribute ATTR of SRC_DIE.
19353 On entry *REF_CU is the CU of SRC_DIE.
19354 On exit *REF_CU is the CU of the result. */
19356 static struct die_info *
19357 follow_die_ref (struct die_info *src_die, const struct attribute *attr,
19358 struct dwarf2_cu **ref_cu)
19360 sect_offset offset = dwarf2_get_ref_die_offset (attr);
19361 struct dwarf2_cu *cu = *ref_cu;
19362 struct die_info *die;
19364 die = follow_die_offset (offset,
19365 (attr->form == DW_FORM_GNU_ref_alt
19366 || cu->per_cu->is_dwz),
19369 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19370 "at 0x%x [in module %s]"),
19371 offset.sect_off, src_die->offset.sect_off,
19372 objfile_name (cu->objfile));
19377 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19378 Returned value is intended for DW_OP_call*. Returned
19379 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19381 struct dwarf2_locexpr_baton
19382 dwarf2_fetch_die_loc_sect_off (sect_offset offset,
19383 struct dwarf2_per_cu_data *per_cu,
19384 CORE_ADDR (*get_frame_pc) (void *baton),
19387 struct dwarf2_cu *cu;
19388 struct die_info *die;
19389 struct attribute *attr;
19390 struct dwarf2_locexpr_baton retval;
19392 dw2_setup (per_cu->objfile);
19394 if (per_cu->cu == NULL)
19398 die = follow_die_offset (offset, per_cu->is_dwz, &cu);
19400 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19401 offset.sect_off, objfile_name (per_cu->objfile));
19403 attr = dwarf2_attr (die, DW_AT_location, cu);
19406 /* DWARF: "If there is no such attribute, then there is no effect.".
19407 DATA is ignored if SIZE is 0. */
19409 retval.data = NULL;
19412 else if (attr_form_is_section_offset (attr))
19414 struct dwarf2_loclist_baton loclist_baton;
19415 CORE_ADDR pc = (*get_frame_pc) (baton);
19418 fill_in_loclist_baton (cu, &loclist_baton, attr);
19420 retval.data = dwarf2_find_location_expression (&loclist_baton,
19422 retval.size = size;
19426 if (!attr_form_is_block (attr))
19427 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19428 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19429 offset.sect_off, objfile_name (per_cu->objfile));
19431 retval.data = DW_BLOCK (attr)->data;
19432 retval.size = DW_BLOCK (attr)->size;
19434 retval.per_cu = cu->per_cu;
19436 age_cached_comp_units ();
19441 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19444 struct dwarf2_locexpr_baton
19445 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu,
19446 struct dwarf2_per_cu_data *per_cu,
19447 CORE_ADDR (*get_frame_pc) (void *baton),
19450 sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off };
19452 return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton);
19455 /* Write a constant of a given type as target-ordered bytes into
19458 static const gdb_byte *
19459 write_constant_as_bytes (struct obstack *obstack,
19460 enum bfd_endian byte_order,
19467 *len = TYPE_LENGTH (type);
19468 result = obstack_alloc (obstack, *len);
19469 store_unsigned_integer (result, *len, byte_order, value);
19474 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19475 pointer to the constant bytes and set LEN to the length of the
19476 data. If memory is needed, allocate it on OBSTACK. If the DIE
19477 does not have a DW_AT_const_value, return NULL. */
19480 dwarf2_fetch_constant_bytes (sect_offset offset,
19481 struct dwarf2_per_cu_data *per_cu,
19482 struct obstack *obstack,
19485 struct dwarf2_cu *cu;
19486 struct die_info *die;
19487 struct attribute *attr;
19488 const gdb_byte *result = NULL;
19491 enum bfd_endian byte_order;
19493 dw2_setup (per_cu->objfile);
19495 if (per_cu->cu == NULL)
19499 die = follow_die_offset (offset, per_cu->is_dwz, &cu);
19501 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19502 offset.sect_off, objfile_name (per_cu->objfile));
19505 attr = dwarf2_attr (die, DW_AT_const_value, cu);
19509 byte_order = (bfd_big_endian (per_cu->objfile->obfd)
19510 ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
19512 switch (attr->form)
19515 case DW_FORM_GNU_addr_index:
19519 *len = cu->header.addr_size;
19520 tem = obstack_alloc (obstack, *len);
19521 store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr));
19525 case DW_FORM_string:
19527 case DW_FORM_GNU_str_index:
19528 case DW_FORM_GNU_strp_alt:
19529 /* DW_STRING is already allocated on the objfile obstack, point
19531 result = (const gdb_byte *) DW_STRING (attr);
19532 *len = strlen (DW_STRING (attr));
19534 case DW_FORM_block1:
19535 case DW_FORM_block2:
19536 case DW_FORM_block4:
19537 case DW_FORM_block:
19538 case DW_FORM_exprloc:
19539 result = DW_BLOCK (attr)->data;
19540 *len = DW_BLOCK (attr)->size;
19543 /* The DW_AT_const_value attributes are supposed to carry the
19544 symbol's value "represented as it would be on the target
19545 architecture." By the time we get here, it's already been
19546 converted to host endianness, so we just need to sign- or
19547 zero-extend it as appropriate. */
19548 case DW_FORM_data1:
19549 type = die_type (die, cu);
19550 result = dwarf2_const_value_data (attr, obstack, cu, &value, 8);
19551 if (result == NULL)
19552 result = write_constant_as_bytes (obstack, byte_order,
19555 case DW_FORM_data2:
19556 type = die_type (die, cu);
19557 result = dwarf2_const_value_data (attr, obstack, cu, &value, 16);
19558 if (result == NULL)
19559 result = write_constant_as_bytes (obstack, byte_order,
19562 case DW_FORM_data4:
19563 type = die_type (die, cu);
19564 result = dwarf2_const_value_data (attr, obstack, cu, &value, 32);
19565 if (result == NULL)
19566 result = write_constant_as_bytes (obstack, byte_order,
19569 case DW_FORM_data8:
19570 type = die_type (die, cu);
19571 result = dwarf2_const_value_data (attr, obstack, cu, &value, 64);
19572 if (result == NULL)
19573 result = write_constant_as_bytes (obstack, byte_order,
19577 case DW_FORM_sdata:
19578 type = die_type (die, cu);
19579 result = write_constant_as_bytes (obstack, byte_order,
19580 type, DW_SND (attr), len);
19583 case DW_FORM_udata:
19584 type = die_type (die, cu);
19585 result = write_constant_as_bytes (obstack, byte_order,
19586 type, DW_UNSND (attr), len);
19590 complaint (&symfile_complaints,
19591 _("unsupported const value attribute form: '%s'"),
19592 dwarf_form_name (attr->form));
19599 /* Return the type of the DIE at DIE_OFFSET in the CU named by
19603 dwarf2_get_die_type (cu_offset die_offset,
19604 struct dwarf2_per_cu_data *per_cu)
19606 sect_offset die_offset_sect;
19608 dw2_setup (per_cu->objfile);
19610 die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off;
19611 return get_die_type_at_offset (die_offset_sect, per_cu);
19614 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
19615 On entry *REF_CU is the CU of SRC_DIE.
19616 On exit *REF_CU is the CU of the result.
19617 Returns NULL if the referenced DIE isn't found. */
19619 static struct die_info *
19620 follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type,
19621 struct dwarf2_cu **ref_cu)
19623 struct objfile *objfile = (*ref_cu)->objfile;
19624 struct die_info temp_die;
19625 struct dwarf2_cu *sig_cu;
19626 struct die_info *die;
19628 /* While it might be nice to assert sig_type->type == NULL here,
19629 we can get here for DW_AT_imported_declaration where we need
19630 the DIE not the type. */
19632 /* If necessary, add it to the queue and load its DIEs. */
19634 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal))
19635 read_signatured_type (sig_type);
19637 sig_cu = sig_type->per_cu.cu;
19638 gdb_assert (sig_cu != NULL);
19639 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
19640 temp_die.offset = sig_type->type_offset_in_section;
19641 die = htab_find_with_hash (sig_cu->die_hash, &temp_die,
19642 temp_die.offset.sect_off);
19645 /* For .gdb_index version 7 keep track of included TUs.
19646 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
19647 if (dwarf2_per_objfile->index_table != NULL
19648 && dwarf2_per_objfile->index_table->version <= 7)
19650 VEC_safe_push (dwarf2_per_cu_ptr,
19651 (*ref_cu)->per_cu->imported_symtabs,
19662 /* Follow signatured type referenced by ATTR in SRC_DIE.
19663 On entry *REF_CU is the CU of SRC_DIE.
19664 On exit *REF_CU is the CU of the result.
19665 The result is the DIE of the type.
19666 If the referenced type cannot be found an error is thrown. */
19668 static struct die_info *
19669 follow_die_sig (struct die_info *src_die, const struct attribute *attr,
19670 struct dwarf2_cu **ref_cu)
19672 ULONGEST signature = DW_SIGNATURE (attr);
19673 struct signatured_type *sig_type;
19674 struct die_info *die;
19676 gdb_assert (attr->form == DW_FORM_ref_sig8);
19678 sig_type = lookup_signatured_type (*ref_cu, signature);
19679 /* sig_type will be NULL if the signatured type is missing from
19681 if (sig_type == NULL)
19683 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
19684 " from DIE at 0x%x [in module %s]"),
19685 hex_string (signature), src_die->offset.sect_off,
19686 objfile_name ((*ref_cu)->objfile));
19689 die = follow_die_sig_1 (src_die, sig_type, ref_cu);
19692 dump_die_for_error (src_die);
19693 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
19694 " from DIE at 0x%x [in module %s]"),
19695 hex_string (signature), src_die->offset.sect_off,
19696 objfile_name ((*ref_cu)->objfile));
19702 /* Get the type specified by SIGNATURE referenced in DIE/CU,
19703 reading in and processing the type unit if necessary. */
19705 static struct type *
19706 get_signatured_type (struct die_info *die, ULONGEST signature,
19707 struct dwarf2_cu *cu)
19709 struct signatured_type *sig_type;
19710 struct dwarf2_cu *type_cu;
19711 struct die_info *type_die;
19714 sig_type = lookup_signatured_type (cu, signature);
19715 /* sig_type will be NULL if the signatured type is missing from
19717 if (sig_type == NULL)
19719 complaint (&symfile_complaints,
19720 _("Dwarf Error: Cannot find signatured DIE %s referenced"
19721 " from DIE at 0x%x [in module %s]"),
19722 hex_string (signature), die->offset.sect_off,
19723 objfile_name (dwarf2_per_objfile->objfile));
19724 return build_error_marker_type (cu, die);
19727 /* If we already know the type we're done. */
19728 if (sig_type->type != NULL)
19729 return sig_type->type;
19732 type_die = follow_die_sig_1 (die, sig_type, &type_cu);
19733 if (type_die != NULL)
19735 /* N.B. We need to call get_die_type to ensure only one type for this DIE
19736 is created. This is important, for example, because for c++ classes
19737 we need TYPE_NAME set which is only done by new_symbol. Blech. */
19738 type = read_type_die (type_die, type_cu);
19741 complaint (&symfile_complaints,
19742 _("Dwarf Error: Cannot build signatured type %s"
19743 " referenced from DIE at 0x%x [in module %s]"),
19744 hex_string (signature), die->offset.sect_off,
19745 objfile_name (dwarf2_per_objfile->objfile));
19746 type = build_error_marker_type (cu, die);
19751 complaint (&symfile_complaints,
19752 _("Dwarf Error: Problem reading signatured DIE %s referenced"
19753 " from DIE at 0x%x [in module %s]"),
19754 hex_string (signature), die->offset.sect_off,
19755 objfile_name (dwarf2_per_objfile->objfile));
19756 type = build_error_marker_type (cu, die);
19758 sig_type->type = type;
19763 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
19764 reading in and processing the type unit if necessary. */
19766 static struct type *
19767 get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr,
19768 struct dwarf2_cu *cu) /* ARI: editCase function */
19770 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
19771 if (attr_form_is_ref (attr))
19773 struct dwarf2_cu *type_cu = cu;
19774 struct die_info *type_die = follow_die_ref (die, attr, &type_cu);
19776 return read_type_die (type_die, type_cu);
19778 else if (attr->form == DW_FORM_ref_sig8)
19780 return get_signatured_type (die, DW_SIGNATURE (attr), cu);
19784 complaint (&symfile_complaints,
19785 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
19786 " at 0x%x [in module %s]"),
19787 dwarf_form_name (attr->form), die->offset.sect_off,
19788 objfile_name (dwarf2_per_objfile->objfile));
19789 return build_error_marker_type (cu, die);
19793 /* Load the DIEs associated with type unit PER_CU into memory. */
19796 load_full_type_unit (struct dwarf2_per_cu_data *per_cu)
19798 struct signatured_type *sig_type;
19800 /* Caller is responsible for ensuring type_unit_groups don't get here. */
19801 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
19803 /* We have the per_cu, but we need the signatured_type.
19804 Fortunately this is an easy translation. */
19805 gdb_assert (per_cu->is_debug_types);
19806 sig_type = (struct signatured_type *) per_cu;
19808 gdb_assert (per_cu->cu == NULL);
19810 read_signatured_type (sig_type);
19812 gdb_assert (per_cu->cu != NULL);
19815 /* die_reader_func for read_signatured_type.
19816 This is identical to load_full_comp_unit_reader,
19817 but is kept separate for now. */
19820 read_signatured_type_reader (const struct die_reader_specs *reader,
19821 const gdb_byte *info_ptr,
19822 struct die_info *comp_unit_die,
19826 struct dwarf2_cu *cu = reader->cu;
19828 gdb_assert (cu->die_hash == NULL);
19830 htab_create_alloc_ex (cu->header.length / 12,
19834 &cu->comp_unit_obstack,
19835 hashtab_obstack_allocate,
19836 dummy_obstack_deallocate);
19839 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
19840 &info_ptr, comp_unit_die);
19841 cu->dies = comp_unit_die;
19842 /* comp_unit_die is not stored in die_hash, no need. */
19844 /* We try not to read any attributes in this function, because not
19845 all CUs needed for references have been loaded yet, and symbol
19846 table processing isn't initialized. But we have to set the CU language,
19847 or we won't be able to build types correctly.
19848 Similarly, if we do not read the producer, we can not apply
19849 producer-specific interpretation. */
19850 prepare_one_comp_unit (cu, cu->dies, language_minimal);
19853 /* Read in a signatured type and build its CU and DIEs.
19854 If the type is a stub for the real type in a DWO file,
19855 read in the real type from the DWO file as well. */
19858 read_signatured_type (struct signatured_type *sig_type)
19860 struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu;
19862 gdb_assert (per_cu->is_debug_types);
19863 gdb_assert (per_cu->cu == NULL);
19865 init_cutu_and_read_dies (per_cu, NULL, 0, 1,
19866 read_signatured_type_reader, NULL);
19867 sig_type->per_cu.tu_read = 1;
19870 /* Decode simple location descriptions.
19871 Given a pointer to a dwarf block that defines a location, compute
19872 the location and return the value.
19874 NOTE drow/2003-11-18: This function is called in two situations
19875 now: for the address of static or global variables (partial symbols
19876 only) and for offsets into structures which are expected to be
19877 (more or less) constant. The partial symbol case should go away,
19878 and only the constant case should remain. That will let this
19879 function complain more accurately. A few special modes are allowed
19880 without complaint for global variables (for instance, global
19881 register values and thread-local values).
19883 A location description containing no operations indicates that the
19884 object is optimized out. The return value is 0 for that case.
19885 FIXME drow/2003-11-16: No callers check for this case any more; soon all
19886 callers will only want a very basic result and this can become a
19889 Note that stack[0] is unused except as a default error return. */
19892 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
19894 struct objfile *objfile = cu->objfile;
19896 size_t size = blk->size;
19897 const gdb_byte *data = blk->data;
19898 CORE_ADDR stack[64];
19900 unsigned int bytes_read, unsnd;
19906 stack[++stacki] = 0;
19945 stack[++stacki] = op - DW_OP_lit0;
19980 stack[++stacki] = op - DW_OP_reg0;
19982 dwarf2_complex_location_expr_complaint ();
19986 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
19988 stack[++stacki] = unsnd;
19990 dwarf2_complex_location_expr_complaint ();
19994 stack[++stacki] = read_address (objfile->obfd, &data[i],
19999 case DW_OP_const1u:
20000 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
20004 case DW_OP_const1s:
20005 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
20009 case DW_OP_const2u:
20010 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
20014 case DW_OP_const2s:
20015 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
20019 case DW_OP_const4u:
20020 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
20024 case DW_OP_const4s:
20025 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
20029 case DW_OP_const8u:
20030 stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]);
20035 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
20041 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
20046 stack[stacki + 1] = stack[stacki];
20051 stack[stacki - 1] += stack[stacki];
20055 case DW_OP_plus_uconst:
20056 stack[stacki] += read_unsigned_leb128 (NULL, (data + i),
20062 stack[stacki - 1] -= stack[stacki];
20067 /* If we're not the last op, then we definitely can't encode
20068 this using GDB's address_class enum. This is valid for partial
20069 global symbols, although the variable's address will be bogus
20072 dwarf2_complex_location_expr_complaint ();
20075 case DW_OP_GNU_push_tls_address:
20076 /* The top of the stack has the offset from the beginning
20077 of the thread control block at which the variable is located. */
20078 /* Nothing should follow this operator, so the top of stack would
20080 /* This is valid for partial global symbols, but the variable's
20081 address will be bogus in the psymtab. Make it always at least
20082 non-zero to not look as a variable garbage collected by linker
20083 which have DW_OP_addr 0. */
20085 dwarf2_complex_location_expr_complaint ();
20089 case DW_OP_GNU_uninit:
20092 case DW_OP_GNU_addr_index:
20093 case DW_OP_GNU_const_index:
20094 stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i],
20101 const char *name = get_DW_OP_name (op);
20104 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
20107 complaint (&symfile_complaints, _("unsupported stack op: '%02x'"),
20111 return (stack[stacki]);
20114 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20115 outside of the allocated space. Also enforce minimum>0. */
20116 if (stacki >= ARRAY_SIZE (stack) - 1)
20118 complaint (&symfile_complaints,
20119 _("location description stack overflow"));
20125 complaint (&symfile_complaints,
20126 _("location description stack underflow"));
20130 return (stack[stacki]);
20133 /* memory allocation interface */
20135 static struct dwarf_block *
20136 dwarf_alloc_block (struct dwarf2_cu *cu)
20138 struct dwarf_block *blk;
20140 blk = (struct dwarf_block *)
20141 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
20145 static struct die_info *
20146 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
20148 struct die_info *die;
20149 size_t size = sizeof (struct die_info);
20152 size += (num_attrs - 1) * sizeof (struct attribute);
20154 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
20155 memset (die, 0, sizeof (struct die_info));
20160 /* Macro support. */
20162 /* Return file name relative to the compilation directory of file number I in
20163 *LH's file name table. The result is allocated using xmalloc; the caller is
20164 responsible for freeing it. */
20167 file_file_name (int file, struct line_header *lh)
20169 /* Is the file number a valid index into the line header's file name
20170 table? Remember that file numbers start with one, not zero. */
20171 if (1 <= file && file <= lh->num_file_names)
20173 struct file_entry *fe = &lh->file_names[file - 1];
20175 if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0)
20176 return xstrdup (fe->name);
20177 return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING,
20182 /* The compiler produced a bogus file number. We can at least
20183 record the macro definitions made in the file, even if we
20184 won't be able to find the file by name. */
20185 char fake_name[80];
20187 xsnprintf (fake_name, sizeof (fake_name),
20188 "<bad macro file number %d>", file);
20190 complaint (&symfile_complaints,
20191 _("bad file number in macro information (%d)"),
20194 return xstrdup (fake_name);
20198 /* Return the full name of file number I in *LH's file name table.
20199 Use COMP_DIR as the name of the current directory of the
20200 compilation. The result is allocated using xmalloc; the caller is
20201 responsible for freeing it. */
20203 file_full_name (int file, struct line_header *lh, const char *comp_dir)
20205 /* Is the file number a valid index into the line header's file name
20206 table? Remember that file numbers start with one, not zero. */
20207 if (1 <= file && file <= lh->num_file_names)
20209 char *relative = file_file_name (file, lh);
20211 if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL)
20213 return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL);
20216 return file_file_name (file, lh);
20220 static struct macro_source_file *
20221 macro_start_file (int file, int line,
20222 struct macro_source_file *current_file,
20223 const char *comp_dir,
20224 struct line_header *lh, struct objfile *objfile)
20226 /* File name relative to the compilation directory of this source file. */
20227 char *file_name = file_file_name (file, lh);
20229 if (! current_file)
20231 /* Note: We don't create a macro table for this compilation unit
20232 at all until we actually get a filename. */
20233 struct macro_table *macro_table = get_macro_table (objfile, comp_dir);
20235 /* If we have no current file, then this must be the start_file
20236 directive for the compilation unit's main source file. */
20237 current_file = macro_set_main (macro_table, file_name);
20238 macro_define_special (macro_table);
20241 current_file = macro_include (current_file, line, file_name);
20245 return current_file;
20249 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20250 followed by a null byte. */
20252 copy_string (const char *buf, int len)
20254 char *s = xmalloc (len + 1);
20256 memcpy (s, buf, len);
20262 static const char *
20263 consume_improper_spaces (const char *p, const char *body)
20267 complaint (&symfile_complaints,
20268 _("macro definition contains spaces "
20269 "in formal argument list:\n`%s'"),
20281 parse_macro_definition (struct macro_source_file *file, int line,
20286 /* The body string takes one of two forms. For object-like macro
20287 definitions, it should be:
20289 <macro name> " " <definition>
20291 For function-like macro definitions, it should be:
20293 <macro name> "() " <definition>
20295 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20297 Spaces may appear only where explicitly indicated, and in the
20300 The Dwarf 2 spec says that an object-like macro's name is always
20301 followed by a space, but versions of GCC around March 2002 omit
20302 the space when the macro's definition is the empty string.
20304 The Dwarf 2 spec says that there should be no spaces between the
20305 formal arguments in a function-like macro's formal argument list,
20306 but versions of GCC around March 2002 include spaces after the
20310 /* Find the extent of the macro name. The macro name is terminated
20311 by either a space or null character (for an object-like macro) or
20312 an opening paren (for a function-like macro). */
20313 for (p = body; *p; p++)
20314 if (*p == ' ' || *p == '(')
20317 if (*p == ' ' || *p == '\0')
20319 /* It's an object-like macro. */
20320 int name_len = p - body;
20321 char *name = copy_string (body, name_len);
20322 const char *replacement;
20325 replacement = body + name_len + 1;
20328 dwarf2_macro_malformed_definition_complaint (body);
20329 replacement = body + name_len;
20332 macro_define_object (file, line, name, replacement);
20336 else if (*p == '(')
20338 /* It's a function-like macro. */
20339 char *name = copy_string (body, p - body);
20342 char **argv = xmalloc (argv_size * sizeof (*argv));
20346 p = consume_improper_spaces (p, body);
20348 /* Parse the formal argument list. */
20349 while (*p && *p != ')')
20351 /* Find the extent of the current argument name. */
20352 const char *arg_start = p;
20354 while (*p && *p != ',' && *p != ')' && *p != ' ')
20357 if (! *p || p == arg_start)
20358 dwarf2_macro_malformed_definition_complaint (body);
20361 /* Make sure argv has room for the new argument. */
20362 if (argc >= argv_size)
20365 argv = xrealloc (argv, argv_size * sizeof (*argv));
20368 argv[argc++] = copy_string (arg_start, p - arg_start);
20371 p = consume_improper_spaces (p, body);
20373 /* Consume the comma, if present. */
20378 p = consume_improper_spaces (p, body);
20387 /* Perfectly formed definition, no complaints. */
20388 macro_define_function (file, line, name,
20389 argc, (const char **) argv,
20391 else if (*p == '\0')
20393 /* Complain, but do define it. */
20394 dwarf2_macro_malformed_definition_complaint (body);
20395 macro_define_function (file, line, name,
20396 argc, (const char **) argv,
20400 /* Just complain. */
20401 dwarf2_macro_malformed_definition_complaint (body);
20404 /* Just complain. */
20405 dwarf2_macro_malformed_definition_complaint (body);
20411 for (i = 0; i < argc; i++)
20417 dwarf2_macro_malformed_definition_complaint (body);
20420 /* Skip some bytes from BYTES according to the form given in FORM.
20421 Returns the new pointer. */
20423 static const gdb_byte *
20424 skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end,
20425 enum dwarf_form form,
20426 unsigned int offset_size,
20427 struct dwarf2_section_info *section)
20429 unsigned int bytes_read;
20433 case DW_FORM_data1:
20438 case DW_FORM_data2:
20442 case DW_FORM_data4:
20446 case DW_FORM_data8:
20450 case DW_FORM_string:
20451 read_direct_string (abfd, bytes, &bytes_read);
20452 bytes += bytes_read;
20455 case DW_FORM_sec_offset:
20457 case DW_FORM_GNU_strp_alt:
20458 bytes += offset_size;
20461 case DW_FORM_block:
20462 bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read);
20463 bytes += bytes_read;
20466 case DW_FORM_block1:
20467 bytes += 1 + read_1_byte (abfd, bytes);
20469 case DW_FORM_block2:
20470 bytes += 2 + read_2_bytes (abfd, bytes);
20472 case DW_FORM_block4:
20473 bytes += 4 + read_4_bytes (abfd, bytes);
20476 case DW_FORM_sdata:
20477 case DW_FORM_udata:
20478 case DW_FORM_GNU_addr_index:
20479 case DW_FORM_GNU_str_index:
20480 bytes = gdb_skip_leb128 (bytes, buffer_end);
20483 dwarf2_section_buffer_overflow_complaint (section);
20491 complaint (&symfile_complaints,
20492 _("invalid form 0x%x in `%s'"),
20493 form, get_section_name (section));
20501 /* A helper for dwarf_decode_macros that handles skipping an unknown
20502 opcode. Returns an updated pointer to the macro data buffer; or,
20503 on error, issues a complaint and returns NULL. */
20505 static const gdb_byte *
20506 skip_unknown_opcode (unsigned int opcode,
20507 const gdb_byte **opcode_definitions,
20508 const gdb_byte *mac_ptr, const gdb_byte *mac_end,
20510 unsigned int offset_size,
20511 struct dwarf2_section_info *section)
20513 unsigned int bytes_read, i;
20515 const gdb_byte *defn;
20517 if (opcode_definitions[opcode] == NULL)
20519 complaint (&symfile_complaints,
20520 _("unrecognized DW_MACFINO opcode 0x%x"),
20525 defn = opcode_definitions[opcode];
20526 arg = read_unsigned_leb128 (abfd, defn, &bytes_read);
20527 defn += bytes_read;
20529 for (i = 0; i < arg; ++i)
20531 mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size,
20533 if (mac_ptr == NULL)
20535 /* skip_form_bytes already issued the complaint. */
20543 /* A helper function which parses the header of a macro section.
20544 If the macro section is the extended (for now called "GNU") type,
20545 then this updates *OFFSET_SIZE. Returns a pointer to just after
20546 the header, or issues a complaint and returns NULL on error. */
20548 static const gdb_byte *
20549 dwarf_parse_macro_header (const gdb_byte **opcode_definitions,
20551 const gdb_byte *mac_ptr,
20552 unsigned int *offset_size,
20553 int section_is_gnu)
20555 memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *));
20557 if (section_is_gnu)
20559 unsigned int version, flags;
20561 version = read_2_bytes (abfd, mac_ptr);
20564 complaint (&symfile_complaints,
20565 _("unrecognized version `%d' in .debug_macro section"),
20571 flags = read_1_byte (abfd, mac_ptr);
20573 *offset_size = (flags & 1) ? 8 : 4;
20575 if ((flags & 2) != 0)
20576 /* We don't need the line table offset. */
20577 mac_ptr += *offset_size;
20579 /* Vendor opcode descriptions. */
20580 if ((flags & 4) != 0)
20582 unsigned int i, count;
20584 count = read_1_byte (abfd, mac_ptr);
20586 for (i = 0; i < count; ++i)
20588 unsigned int opcode, bytes_read;
20591 opcode = read_1_byte (abfd, mac_ptr);
20593 opcode_definitions[opcode] = mac_ptr;
20594 arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20595 mac_ptr += bytes_read;
20604 /* A helper for dwarf_decode_macros that handles the GNU extensions,
20605 including DW_MACRO_GNU_transparent_include. */
20608 dwarf_decode_macro_bytes (bfd *abfd,
20609 const gdb_byte *mac_ptr, const gdb_byte *mac_end,
20610 struct macro_source_file *current_file,
20611 struct line_header *lh, const char *comp_dir,
20612 struct dwarf2_section_info *section,
20613 int section_is_gnu, int section_is_dwz,
20614 unsigned int offset_size,
20615 struct objfile *objfile,
20616 htab_t include_hash)
20618 enum dwarf_macro_record_type macinfo_type;
20619 int at_commandline;
20620 const gdb_byte *opcode_definitions[256];
20622 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
20623 &offset_size, section_is_gnu);
20624 if (mac_ptr == NULL)
20626 /* We already issued a complaint. */
20630 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
20631 GDB is still reading the definitions from command line. First
20632 DW_MACINFO_start_file will need to be ignored as it was already executed
20633 to create CURRENT_FILE for the main source holding also the command line
20634 definitions. On first met DW_MACINFO_start_file this flag is reset to
20635 normally execute all the remaining DW_MACINFO_start_file macinfos. */
20637 at_commandline = 1;
20641 /* Do we at least have room for a macinfo type byte? */
20642 if (mac_ptr >= mac_end)
20644 dwarf2_section_buffer_overflow_complaint (section);
20648 macinfo_type = read_1_byte (abfd, mac_ptr);
20651 /* Note that we rely on the fact that the corresponding GNU and
20652 DWARF constants are the same. */
20653 switch (macinfo_type)
20655 /* A zero macinfo type indicates the end of the macro
20660 case DW_MACRO_GNU_define:
20661 case DW_MACRO_GNU_undef:
20662 case DW_MACRO_GNU_define_indirect:
20663 case DW_MACRO_GNU_undef_indirect:
20664 case DW_MACRO_GNU_define_indirect_alt:
20665 case DW_MACRO_GNU_undef_indirect_alt:
20667 unsigned int bytes_read;
20672 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20673 mac_ptr += bytes_read;
20675 if (macinfo_type == DW_MACRO_GNU_define
20676 || macinfo_type == DW_MACRO_GNU_undef)
20678 body = read_direct_string (abfd, mac_ptr, &bytes_read);
20679 mac_ptr += bytes_read;
20683 LONGEST str_offset;
20685 str_offset = read_offset_1 (abfd, mac_ptr, offset_size);
20686 mac_ptr += offset_size;
20688 if (macinfo_type == DW_MACRO_GNU_define_indirect_alt
20689 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt
20692 struct dwz_file *dwz = dwarf2_get_dwz_file ();
20694 body = read_indirect_string_from_dwz (dwz, str_offset);
20697 body = read_indirect_string_at_offset (abfd, str_offset);
20700 is_define = (macinfo_type == DW_MACRO_GNU_define
20701 || macinfo_type == DW_MACRO_GNU_define_indirect
20702 || macinfo_type == DW_MACRO_GNU_define_indirect_alt);
20703 if (! current_file)
20705 /* DWARF violation as no main source is present. */
20706 complaint (&symfile_complaints,
20707 _("debug info with no main source gives macro %s "
20709 is_define ? _("definition") : _("undefinition"),
20713 if ((line == 0 && !at_commandline)
20714 || (line != 0 && at_commandline))
20715 complaint (&symfile_complaints,
20716 _("debug info gives %s macro %s with %s line %d: %s"),
20717 at_commandline ? _("command-line") : _("in-file"),
20718 is_define ? _("definition") : _("undefinition"),
20719 line == 0 ? _("zero") : _("non-zero"), line, body);
20722 parse_macro_definition (current_file, line, body);
20725 gdb_assert (macinfo_type == DW_MACRO_GNU_undef
20726 || macinfo_type == DW_MACRO_GNU_undef_indirect
20727 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt);
20728 macro_undef (current_file, line, body);
20733 case DW_MACRO_GNU_start_file:
20735 unsigned int bytes_read;
20738 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20739 mac_ptr += bytes_read;
20740 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20741 mac_ptr += bytes_read;
20743 if ((line == 0 && !at_commandline)
20744 || (line != 0 && at_commandline))
20745 complaint (&symfile_complaints,
20746 _("debug info gives source %d included "
20747 "from %s at %s line %d"),
20748 file, at_commandline ? _("command-line") : _("file"),
20749 line == 0 ? _("zero") : _("non-zero"), line);
20751 if (at_commandline)
20753 /* This DW_MACRO_GNU_start_file was executed in the
20755 at_commandline = 0;
20758 current_file = macro_start_file (file, line,
20759 current_file, comp_dir,
20764 case DW_MACRO_GNU_end_file:
20765 if (! current_file)
20766 complaint (&symfile_complaints,
20767 _("macro debug info has an unmatched "
20768 "`close_file' directive"));
20771 current_file = current_file->included_by;
20772 if (! current_file)
20774 enum dwarf_macro_record_type next_type;
20776 /* GCC circa March 2002 doesn't produce the zero
20777 type byte marking the end of the compilation
20778 unit. Complain if it's not there, but exit no
20781 /* Do we at least have room for a macinfo type byte? */
20782 if (mac_ptr >= mac_end)
20784 dwarf2_section_buffer_overflow_complaint (section);
20788 /* We don't increment mac_ptr here, so this is just
20790 next_type = read_1_byte (abfd, mac_ptr);
20791 if (next_type != 0)
20792 complaint (&symfile_complaints,
20793 _("no terminating 0-type entry for "
20794 "macros in `.debug_macinfo' section"));
20801 case DW_MACRO_GNU_transparent_include:
20802 case DW_MACRO_GNU_transparent_include_alt:
20806 bfd *include_bfd = abfd;
20807 struct dwarf2_section_info *include_section = section;
20808 struct dwarf2_section_info alt_section;
20809 const gdb_byte *include_mac_end = mac_end;
20810 int is_dwz = section_is_dwz;
20811 const gdb_byte *new_mac_ptr;
20813 offset = read_offset_1 (abfd, mac_ptr, offset_size);
20814 mac_ptr += offset_size;
20816 if (macinfo_type == DW_MACRO_GNU_transparent_include_alt)
20818 struct dwz_file *dwz = dwarf2_get_dwz_file ();
20820 dwarf2_read_section (dwarf2_per_objfile->objfile,
20823 include_section = &dwz->macro;
20824 include_bfd = get_section_bfd_owner (include_section);
20825 include_mac_end = dwz->macro.buffer + dwz->macro.size;
20829 new_mac_ptr = include_section->buffer + offset;
20830 slot = htab_find_slot (include_hash, new_mac_ptr, INSERT);
20834 /* This has actually happened; see
20835 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
20836 complaint (&symfile_complaints,
20837 _("recursive DW_MACRO_GNU_transparent_include in "
20838 ".debug_macro section"));
20842 *slot = (void *) new_mac_ptr;
20844 dwarf_decode_macro_bytes (include_bfd, new_mac_ptr,
20845 include_mac_end, current_file,
20847 section, section_is_gnu, is_dwz,
20848 offset_size, objfile, include_hash);
20850 htab_remove_elt (include_hash, (void *) new_mac_ptr);
20855 case DW_MACINFO_vendor_ext:
20856 if (!section_is_gnu)
20858 unsigned int bytes_read;
20861 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20862 mac_ptr += bytes_read;
20863 read_direct_string (abfd, mac_ptr, &bytes_read);
20864 mac_ptr += bytes_read;
20866 /* We don't recognize any vendor extensions. */
20872 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
20873 mac_ptr, mac_end, abfd, offset_size,
20875 if (mac_ptr == NULL)
20879 } while (macinfo_type != 0);
20883 dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset,
20884 const char *comp_dir, int section_is_gnu)
20886 struct objfile *objfile = dwarf2_per_objfile->objfile;
20887 struct line_header *lh = cu->line_header;
20889 const gdb_byte *mac_ptr, *mac_end;
20890 struct macro_source_file *current_file = 0;
20891 enum dwarf_macro_record_type macinfo_type;
20892 unsigned int offset_size = cu->header.offset_size;
20893 const gdb_byte *opcode_definitions[256];
20894 struct cleanup *cleanup;
20895 htab_t include_hash;
20897 struct dwarf2_section_info *section;
20898 const char *section_name;
20900 if (cu->dwo_unit != NULL)
20902 if (section_is_gnu)
20904 section = &cu->dwo_unit->dwo_file->sections.macro;
20905 section_name = ".debug_macro.dwo";
20909 section = &cu->dwo_unit->dwo_file->sections.macinfo;
20910 section_name = ".debug_macinfo.dwo";
20915 if (section_is_gnu)
20917 section = &dwarf2_per_objfile->macro;
20918 section_name = ".debug_macro";
20922 section = &dwarf2_per_objfile->macinfo;
20923 section_name = ".debug_macinfo";
20927 dwarf2_read_section (objfile, section);
20928 if (section->buffer == NULL)
20930 complaint (&symfile_complaints, _("missing %s section"), section_name);
20933 abfd = get_section_bfd_owner (section);
20935 /* First pass: Find the name of the base filename.
20936 This filename is needed in order to process all macros whose definition
20937 (or undefinition) comes from the command line. These macros are defined
20938 before the first DW_MACINFO_start_file entry, and yet still need to be
20939 associated to the base file.
20941 To determine the base file name, we scan the macro definitions until we
20942 reach the first DW_MACINFO_start_file entry. We then initialize
20943 CURRENT_FILE accordingly so that any macro definition found before the
20944 first DW_MACINFO_start_file can still be associated to the base file. */
20946 mac_ptr = section->buffer + offset;
20947 mac_end = section->buffer + section->size;
20949 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
20950 &offset_size, section_is_gnu);
20951 if (mac_ptr == NULL)
20953 /* We already issued a complaint. */
20959 /* Do we at least have room for a macinfo type byte? */
20960 if (mac_ptr >= mac_end)
20962 /* Complaint is printed during the second pass as GDB will probably
20963 stop the first pass earlier upon finding
20964 DW_MACINFO_start_file. */
20968 macinfo_type = read_1_byte (abfd, mac_ptr);
20971 /* Note that we rely on the fact that the corresponding GNU and
20972 DWARF constants are the same. */
20973 switch (macinfo_type)
20975 /* A zero macinfo type indicates the end of the macro
20980 case DW_MACRO_GNU_define:
20981 case DW_MACRO_GNU_undef:
20982 /* Only skip the data by MAC_PTR. */
20984 unsigned int bytes_read;
20986 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20987 mac_ptr += bytes_read;
20988 read_direct_string (abfd, mac_ptr, &bytes_read);
20989 mac_ptr += bytes_read;
20993 case DW_MACRO_GNU_start_file:
20995 unsigned int bytes_read;
20998 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20999 mac_ptr += bytes_read;
21000 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
21001 mac_ptr += bytes_read;
21003 current_file = macro_start_file (file, line, current_file,
21004 comp_dir, lh, objfile);
21008 case DW_MACRO_GNU_end_file:
21009 /* No data to skip by MAC_PTR. */
21012 case DW_MACRO_GNU_define_indirect:
21013 case DW_MACRO_GNU_undef_indirect:
21014 case DW_MACRO_GNU_define_indirect_alt:
21015 case DW_MACRO_GNU_undef_indirect_alt:
21017 unsigned int bytes_read;
21019 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
21020 mac_ptr += bytes_read;
21021 mac_ptr += offset_size;
21025 case DW_MACRO_GNU_transparent_include:
21026 case DW_MACRO_GNU_transparent_include_alt:
21027 /* Note that, according to the spec, a transparent include
21028 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21029 skip this opcode. */
21030 mac_ptr += offset_size;
21033 case DW_MACINFO_vendor_ext:
21034 /* Only skip the data by MAC_PTR. */
21035 if (!section_is_gnu)
21037 unsigned int bytes_read;
21039 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
21040 mac_ptr += bytes_read;
21041 read_direct_string (abfd, mac_ptr, &bytes_read);
21042 mac_ptr += bytes_read;
21047 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
21048 mac_ptr, mac_end, abfd, offset_size,
21050 if (mac_ptr == NULL)
21054 } while (macinfo_type != 0 && current_file == NULL);
21056 /* Second pass: Process all entries.
21058 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21059 command-line macro definitions/undefinitions. This flag is unset when we
21060 reach the first DW_MACINFO_start_file entry. */
21062 include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
21063 NULL, xcalloc, xfree);
21064 cleanup = make_cleanup_htab_delete (include_hash);
21065 mac_ptr = section->buffer + offset;
21066 slot = htab_find_slot (include_hash, mac_ptr, INSERT);
21067 *slot = (void *) mac_ptr;
21068 dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end,
21069 current_file, lh, comp_dir, section,
21071 offset_size, objfile, include_hash);
21072 do_cleanups (cleanup);
21075 /* Check if the attribute's form is a DW_FORM_block*
21076 if so return true else false. */
21079 attr_form_is_block (const struct attribute *attr)
21081 return (attr == NULL ? 0 :
21082 attr->form == DW_FORM_block1
21083 || attr->form == DW_FORM_block2
21084 || attr->form == DW_FORM_block4
21085 || attr->form == DW_FORM_block
21086 || attr->form == DW_FORM_exprloc);
21089 /* Return non-zero if ATTR's value is a section offset --- classes
21090 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21091 You may use DW_UNSND (attr) to retrieve such offsets.
21093 Section 7.5.4, "Attribute Encodings", explains that no attribute
21094 may have a value that belongs to more than one of these classes; it
21095 would be ambiguous if we did, because we use the same forms for all
21099 attr_form_is_section_offset (const struct attribute *attr)
21101 return (attr->form == DW_FORM_data4
21102 || attr->form == DW_FORM_data8
21103 || attr->form == DW_FORM_sec_offset);
21106 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21107 zero otherwise. When this function returns true, you can apply
21108 dwarf2_get_attr_constant_value to it.
21110 However, note that for some attributes you must check
21111 attr_form_is_section_offset before using this test. DW_FORM_data4
21112 and DW_FORM_data8 are members of both the constant class, and of
21113 the classes that contain offsets into other debug sections
21114 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21115 that, if an attribute's can be either a constant or one of the
21116 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21117 taken as section offsets, not constants. */
21120 attr_form_is_constant (const struct attribute *attr)
21122 switch (attr->form)
21124 case DW_FORM_sdata:
21125 case DW_FORM_udata:
21126 case DW_FORM_data1:
21127 case DW_FORM_data2:
21128 case DW_FORM_data4:
21129 case DW_FORM_data8:
21137 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21138 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21141 attr_form_is_ref (const struct attribute *attr)
21143 switch (attr->form)
21145 case DW_FORM_ref_addr:
21150 case DW_FORM_ref_udata:
21151 case DW_FORM_GNU_ref_alt:
21158 /* Return the .debug_loc section to use for CU.
21159 For DWO files use .debug_loc.dwo. */
21161 static struct dwarf2_section_info *
21162 cu_debug_loc_section (struct dwarf2_cu *cu)
21165 return &cu->dwo_unit->dwo_file->sections.loc;
21166 return &dwarf2_per_objfile->loc;
21169 /* A helper function that fills in a dwarf2_loclist_baton. */
21172 fill_in_loclist_baton (struct dwarf2_cu *cu,
21173 struct dwarf2_loclist_baton *baton,
21174 const struct attribute *attr)
21176 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
21178 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
21180 baton->per_cu = cu->per_cu;
21181 gdb_assert (baton->per_cu);
21182 /* We don't know how long the location list is, but make sure we
21183 don't run off the edge of the section. */
21184 baton->size = section->size - DW_UNSND (attr);
21185 baton->data = section->buffer + DW_UNSND (attr);
21186 baton->base_address = cu->base_address;
21187 baton->from_dwo = cu->dwo_unit != NULL;
21191 dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym,
21192 struct dwarf2_cu *cu, int is_block)
21194 struct objfile *objfile = dwarf2_per_objfile->objfile;
21195 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
21197 if (attr_form_is_section_offset (attr)
21198 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21199 the section. If so, fall through to the complaint in the
21201 && DW_UNSND (attr) < dwarf2_section_size (objfile, section))
21203 struct dwarf2_loclist_baton *baton;
21205 baton = obstack_alloc (&objfile->objfile_obstack,
21206 sizeof (struct dwarf2_loclist_baton));
21208 fill_in_loclist_baton (cu, baton, attr);
21210 if (cu->base_known == 0)
21211 complaint (&symfile_complaints,
21212 _("Location list used without "
21213 "specifying the CU base address."));
21215 SYMBOL_ACLASS_INDEX (sym) = (is_block
21216 ? dwarf2_loclist_block_index
21217 : dwarf2_loclist_index);
21218 SYMBOL_LOCATION_BATON (sym) = baton;
21222 struct dwarf2_locexpr_baton *baton;
21224 baton = obstack_alloc (&objfile->objfile_obstack,
21225 sizeof (struct dwarf2_locexpr_baton));
21226 baton->per_cu = cu->per_cu;
21227 gdb_assert (baton->per_cu);
21229 if (attr_form_is_block (attr))
21231 /* Note that we're just copying the block's data pointer
21232 here, not the actual data. We're still pointing into the
21233 info_buffer for SYM's objfile; right now we never release
21234 that buffer, but when we do clean up properly this may
21236 baton->size = DW_BLOCK (attr)->size;
21237 baton->data = DW_BLOCK (attr)->data;
21241 dwarf2_invalid_attrib_class_complaint ("location description",
21242 SYMBOL_NATURAL_NAME (sym));
21246 SYMBOL_ACLASS_INDEX (sym) = (is_block
21247 ? dwarf2_locexpr_block_index
21248 : dwarf2_locexpr_index);
21249 SYMBOL_LOCATION_BATON (sym) = baton;
21253 /* Return the OBJFILE associated with the compilation unit CU. If CU
21254 came from a separate debuginfo file, then the master objfile is
21258 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
21260 struct objfile *objfile = per_cu->objfile;
21262 /* Return the master objfile, so that we can report and look up the
21263 correct file containing this variable. */
21264 if (objfile->separate_debug_objfile_backlink)
21265 objfile = objfile->separate_debug_objfile_backlink;
21270 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21271 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21272 CU_HEADERP first. */
21274 static const struct comp_unit_head *
21275 per_cu_header_read_in (struct comp_unit_head *cu_headerp,
21276 struct dwarf2_per_cu_data *per_cu)
21278 const gdb_byte *info_ptr;
21281 return &per_cu->cu->header;
21283 info_ptr = per_cu->section->buffer + per_cu->offset.sect_off;
21285 memset (cu_headerp, 0, sizeof (*cu_headerp));
21286 read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd);
21291 /* Return the address size given in the compilation unit header for CU. */
21294 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
21296 struct comp_unit_head cu_header_local;
21297 const struct comp_unit_head *cu_headerp;
21299 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
21301 return cu_headerp->addr_size;
21304 /* Return the offset size given in the compilation unit header for CU. */
21307 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
21309 struct comp_unit_head cu_header_local;
21310 const struct comp_unit_head *cu_headerp;
21312 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
21314 return cu_headerp->offset_size;
21317 /* See its dwarf2loc.h declaration. */
21320 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu)
21322 struct comp_unit_head cu_header_local;
21323 const struct comp_unit_head *cu_headerp;
21325 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
21327 if (cu_headerp->version == 2)
21328 return cu_headerp->addr_size;
21330 return cu_headerp->offset_size;
21333 /* Return the text offset of the CU. The returned offset comes from
21334 this CU's objfile. If this objfile came from a separate debuginfo
21335 file, then the offset may be different from the corresponding
21336 offset in the parent objfile. */
21339 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
21341 struct objfile *objfile = per_cu->objfile;
21343 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
21346 /* Locate the .debug_info compilation unit from CU's objfile which contains
21347 the DIE at OFFSET. Raises an error on failure. */
21349 static struct dwarf2_per_cu_data *
21350 dwarf2_find_containing_comp_unit (sect_offset offset,
21351 unsigned int offset_in_dwz,
21352 struct objfile *objfile)
21354 struct dwarf2_per_cu_data *this_cu;
21356 const sect_offset *cu_off;
21359 high = dwarf2_per_objfile->n_comp_units - 1;
21362 struct dwarf2_per_cu_data *mid_cu;
21363 int mid = low + (high - low) / 2;
21365 mid_cu = dwarf2_per_objfile->all_comp_units[mid];
21366 cu_off = &mid_cu->offset;
21367 if (mid_cu->is_dwz > offset_in_dwz
21368 || (mid_cu->is_dwz == offset_in_dwz
21369 && cu_off->sect_off >= offset.sect_off))
21374 gdb_assert (low == high);
21375 this_cu = dwarf2_per_objfile->all_comp_units[low];
21376 cu_off = &this_cu->offset;
21377 if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off)
21379 if (low == 0 || this_cu->is_dwz != offset_in_dwz)
21380 error (_("Dwarf Error: could not find partial DIE containing "
21381 "offset 0x%lx [in module %s]"),
21382 (long) offset.sect_off, bfd_get_filename (objfile->obfd));
21384 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off
21385 <= offset.sect_off);
21386 return dwarf2_per_objfile->all_comp_units[low-1];
21390 this_cu = dwarf2_per_objfile->all_comp_units[low];
21391 if (low == dwarf2_per_objfile->n_comp_units - 1
21392 && offset.sect_off >= this_cu->offset.sect_off + this_cu->length)
21393 error (_("invalid dwarf2 offset %u"), offset.sect_off);
21394 gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length);
21399 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21402 init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu)
21404 memset (cu, 0, sizeof (*cu));
21406 cu->per_cu = per_cu;
21407 cu->objfile = per_cu->objfile;
21408 obstack_init (&cu->comp_unit_obstack);
21411 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21414 prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die,
21415 enum language pretend_language)
21417 struct attribute *attr;
21419 /* Set the language we're debugging. */
21420 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
21422 set_cu_language (DW_UNSND (attr), cu);
21425 cu->language = pretend_language;
21426 cu->language_defn = language_def (cu->language);
21429 attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu);
21431 cu->producer = DW_STRING (attr);
21434 /* Release one cached compilation unit, CU. We unlink it from the tree
21435 of compilation units, but we don't remove it from the read_in_chain;
21436 the caller is responsible for that.
21437 NOTE: DATA is a void * because this function is also used as a
21438 cleanup routine. */
21441 free_heap_comp_unit (void *data)
21443 struct dwarf2_cu *cu = data;
21445 gdb_assert (cu->per_cu != NULL);
21446 cu->per_cu->cu = NULL;
21449 obstack_free (&cu->comp_unit_obstack, NULL);
21454 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21455 when we're finished with it. We can't free the pointer itself, but be
21456 sure to unlink it from the cache. Also release any associated storage. */
21459 free_stack_comp_unit (void *data)
21461 struct dwarf2_cu *cu = data;
21463 gdb_assert (cu->per_cu != NULL);
21464 cu->per_cu->cu = NULL;
21467 obstack_free (&cu->comp_unit_obstack, NULL);
21468 cu->partial_dies = NULL;
21471 /* Free all cached compilation units. */
21474 free_cached_comp_units (void *data)
21476 struct dwarf2_per_cu_data *per_cu, **last_chain;
21478 per_cu = dwarf2_per_objfile->read_in_chain;
21479 last_chain = &dwarf2_per_objfile->read_in_chain;
21480 while (per_cu != NULL)
21482 struct dwarf2_per_cu_data *next_cu;
21484 next_cu = per_cu->cu->read_in_chain;
21486 free_heap_comp_unit (per_cu->cu);
21487 *last_chain = next_cu;
21493 /* Increase the age counter on each cached compilation unit, and free
21494 any that are too old. */
21497 age_cached_comp_units (void)
21499 struct dwarf2_per_cu_data *per_cu, **last_chain;
21501 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
21502 per_cu = dwarf2_per_objfile->read_in_chain;
21503 while (per_cu != NULL)
21505 per_cu->cu->last_used ++;
21506 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
21507 dwarf2_mark (per_cu->cu);
21508 per_cu = per_cu->cu->read_in_chain;
21511 per_cu = dwarf2_per_objfile->read_in_chain;
21512 last_chain = &dwarf2_per_objfile->read_in_chain;
21513 while (per_cu != NULL)
21515 struct dwarf2_per_cu_data *next_cu;
21517 next_cu = per_cu->cu->read_in_chain;
21519 if (!per_cu->cu->mark)
21521 free_heap_comp_unit (per_cu->cu);
21522 *last_chain = next_cu;
21525 last_chain = &per_cu->cu->read_in_chain;
21531 /* Remove a single compilation unit from the cache. */
21534 free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu)
21536 struct dwarf2_per_cu_data *per_cu, **last_chain;
21538 per_cu = dwarf2_per_objfile->read_in_chain;
21539 last_chain = &dwarf2_per_objfile->read_in_chain;
21540 while (per_cu != NULL)
21542 struct dwarf2_per_cu_data *next_cu;
21544 next_cu = per_cu->cu->read_in_chain;
21546 if (per_cu == target_per_cu)
21548 free_heap_comp_unit (per_cu->cu);
21550 *last_chain = next_cu;
21554 last_chain = &per_cu->cu->read_in_chain;
21560 /* Release all extra memory associated with OBJFILE. */
21563 dwarf2_free_objfile (struct objfile *objfile)
21565 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
21567 if (dwarf2_per_objfile == NULL)
21570 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21571 free_cached_comp_units (NULL);
21573 if (dwarf2_per_objfile->quick_file_names_table)
21574 htab_delete (dwarf2_per_objfile->quick_file_names_table);
21576 /* Everything else should be on the objfile obstack. */
21579 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
21580 We store these in a hash table separate from the DIEs, and preserve them
21581 when the DIEs are flushed out of cache.
21583 The CU "per_cu" pointer is needed because offset alone is not enough to
21584 uniquely identify the type. A file may have multiple .debug_types sections,
21585 or the type may come from a DWO file. Furthermore, while it's more logical
21586 to use per_cu->section+offset, with Fission the section with the data is in
21587 the DWO file but we don't know that section at the point we need it.
21588 We have to use something in dwarf2_per_cu_data (or the pointer to it)
21589 because we can enter the lookup routine, get_die_type_at_offset, from
21590 outside this file, and thus won't necessarily have PER_CU->cu.
21591 Fortunately, PER_CU is stable for the life of the objfile. */
21593 struct dwarf2_per_cu_offset_and_type
21595 const struct dwarf2_per_cu_data *per_cu;
21596 sect_offset offset;
21600 /* Hash function for a dwarf2_per_cu_offset_and_type. */
21603 per_cu_offset_and_type_hash (const void *item)
21605 const struct dwarf2_per_cu_offset_and_type *ofs = item;
21607 return (uintptr_t) ofs->per_cu + ofs->offset.sect_off;
21610 /* Equality function for a dwarf2_per_cu_offset_and_type. */
21613 per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs)
21615 const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs;
21616 const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs;
21618 return (ofs_lhs->per_cu == ofs_rhs->per_cu
21619 && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off);
21622 /* Set the type associated with DIE to TYPE. Save it in CU's hash
21623 table if necessary. For convenience, return TYPE.
21625 The DIEs reading must have careful ordering to:
21626 * Not cause infite loops trying to read in DIEs as a prerequisite for
21627 reading current DIE.
21628 * Not trying to dereference contents of still incompletely read in types
21629 while reading in other DIEs.
21630 * Enable referencing still incompletely read in types just by a pointer to
21631 the type without accessing its fields.
21633 Therefore caller should follow these rules:
21634 * Try to fetch any prerequisite types we may need to build this DIE type
21635 before building the type and calling set_die_type.
21636 * After building type call set_die_type for current DIE as soon as
21637 possible before fetching more types to complete the current type.
21638 * Make the type as complete as possible before fetching more types. */
21640 static struct type *
21641 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
21643 struct dwarf2_per_cu_offset_and_type **slot, ofs;
21644 struct objfile *objfile = cu->objfile;
21646 /* For Ada types, make sure that the gnat-specific data is always
21647 initialized (if not already set). There are a few types where
21648 we should not be doing so, because the type-specific area is
21649 already used to hold some other piece of info (eg: TYPE_CODE_FLT
21650 where the type-specific area is used to store the floatformat).
21651 But this is not a problem, because the gnat-specific information
21652 is actually not needed for these types. */
21653 if (need_gnat_info (cu)
21654 && TYPE_CODE (type) != TYPE_CODE_FUNC
21655 && TYPE_CODE (type) != TYPE_CODE_FLT
21656 && !HAVE_GNAT_AUX_INFO (type))
21657 INIT_GNAT_SPECIFIC (type);
21659 if (dwarf2_per_objfile->die_type_hash == NULL)
21661 dwarf2_per_objfile->die_type_hash =
21662 htab_create_alloc_ex (127,
21663 per_cu_offset_and_type_hash,
21664 per_cu_offset_and_type_eq,
21666 &objfile->objfile_obstack,
21667 hashtab_obstack_allocate,
21668 dummy_obstack_deallocate);
21671 ofs.per_cu = cu->per_cu;
21672 ofs.offset = die->offset;
21674 slot = (struct dwarf2_per_cu_offset_and_type **)
21675 htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT);
21677 complaint (&symfile_complaints,
21678 _("A problem internal to GDB: DIE 0x%x has type already set"),
21679 die->offset.sect_off);
21680 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
21685 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
21686 or return NULL if the die does not have a saved type. */
21688 static struct type *
21689 get_die_type_at_offset (sect_offset offset,
21690 struct dwarf2_per_cu_data *per_cu)
21692 struct dwarf2_per_cu_offset_and_type *slot, ofs;
21694 if (dwarf2_per_objfile->die_type_hash == NULL)
21697 ofs.per_cu = per_cu;
21698 ofs.offset = offset;
21699 slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs);
21706 /* Look up the type for DIE in CU in die_type_hash,
21707 or return NULL if DIE does not have a saved type. */
21709 static struct type *
21710 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
21712 return get_die_type_at_offset (die->offset, cu->per_cu);
21715 /* Add a dependence relationship from CU to REF_PER_CU. */
21718 dwarf2_add_dependence (struct dwarf2_cu *cu,
21719 struct dwarf2_per_cu_data *ref_per_cu)
21723 if (cu->dependencies == NULL)
21725 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
21726 NULL, &cu->comp_unit_obstack,
21727 hashtab_obstack_allocate,
21728 dummy_obstack_deallocate);
21730 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
21732 *slot = ref_per_cu;
21735 /* Subroutine of dwarf2_mark to pass to htab_traverse.
21736 Set the mark field in every compilation unit in the
21737 cache that we must keep because we are keeping CU. */
21740 dwarf2_mark_helper (void **slot, void *data)
21742 struct dwarf2_per_cu_data *per_cu;
21744 per_cu = (struct dwarf2_per_cu_data *) *slot;
21746 /* cu->dependencies references may not yet have been ever read if QUIT aborts
21747 reading of the chain. As such dependencies remain valid it is not much
21748 useful to track and undo them during QUIT cleanups. */
21749 if (per_cu->cu == NULL)
21752 if (per_cu->cu->mark)
21754 per_cu->cu->mark = 1;
21756 if (per_cu->cu->dependencies != NULL)
21757 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
21762 /* Set the mark field in CU and in every other compilation unit in the
21763 cache that we must keep because we are keeping CU. */
21766 dwarf2_mark (struct dwarf2_cu *cu)
21771 if (cu->dependencies != NULL)
21772 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
21776 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
21780 per_cu->cu->mark = 0;
21781 per_cu = per_cu->cu->read_in_chain;
21785 /* Trivial hash function for partial_die_info: the hash value of a DIE
21786 is its offset in .debug_info for this objfile. */
21789 partial_die_hash (const void *item)
21791 const struct partial_die_info *part_die = item;
21793 return part_die->offset.sect_off;
21796 /* Trivial comparison function for partial_die_info structures: two DIEs
21797 are equal if they have the same offset. */
21800 partial_die_eq (const void *item_lhs, const void *item_rhs)
21802 const struct partial_die_info *part_die_lhs = item_lhs;
21803 const struct partial_die_info *part_die_rhs = item_rhs;
21805 return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off;
21808 static struct cmd_list_element *set_dwarf2_cmdlist;
21809 static struct cmd_list_element *show_dwarf2_cmdlist;
21812 set_dwarf2_cmd (char *args, int from_tty)
21814 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", all_commands,
21819 show_dwarf2_cmd (char *args, int from_tty)
21821 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
21824 /* Free data associated with OBJFILE, if necessary. */
21827 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
21829 struct dwarf2_per_objfile *data = d;
21832 /* Make sure we don't accidentally use dwarf2_per_objfile while
21834 dwarf2_per_objfile = NULL;
21836 for (ix = 0; ix < data->n_comp_units; ++ix)
21837 VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs);
21839 for (ix = 0; ix < data->n_type_units; ++ix)
21840 VEC_free (dwarf2_per_cu_ptr,
21841 data->all_type_units[ix]->per_cu.imported_symtabs);
21842 xfree (data->all_type_units);
21844 VEC_free (dwarf2_section_info_def, data->types);
21846 if (data->dwo_files)
21847 free_dwo_files (data->dwo_files, objfile);
21848 if (data->dwp_file)
21849 gdb_bfd_unref (data->dwp_file->dbfd);
21851 if (data->dwz_file && data->dwz_file->dwz_bfd)
21852 gdb_bfd_unref (data->dwz_file->dwz_bfd);
21856 /* The "save gdb-index" command. */
21858 /* The contents of the hash table we create when building the string
21860 struct strtab_entry
21862 offset_type offset;
21866 /* Hash function for a strtab_entry.
21868 Function is used only during write_hash_table so no index format backward
21869 compatibility is needed. */
21872 hash_strtab_entry (const void *e)
21874 const struct strtab_entry *entry = e;
21875 return mapped_index_string_hash (INT_MAX, entry->str);
21878 /* Equality function for a strtab_entry. */
21881 eq_strtab_entry (const void *a, const void *b)
21883 const struct strtab_entry *ea = a;
21884 const struct strtab_entry *eb = b;
21885 return !strcmp (ea->str, eb->str);
21888 /* Create a strtab_entry hash table. */
21891 create_strtab (void)
21893 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
21894 xfree, xcalloc, xfree);
21897 /* Add a string to the constant pool. Return the string's offset in
21901 add_string (htab_t table, struct obstack *cpool, const char *str)
21904 struct strtab_entry entry;
21905 struct strtab_entry *result;
21908 slot = htab_find_slot (table, &entry, INSERT);
21913 result = XNEW (struct strtab_entry);
21914 result->offset = obstack_object_size (cpool);
21916 obstack_grow_str0 (cpool, str);
21919 return result->offset;
21922 /* An entry in the symbol table. */
21923 struct symtab_index_entry
21925 /* The name of the symbol. */
21927 /* The offset of the name in the constant pool. */
21928 offset_type index_offset;
21929 /* A sorted vector of the indices of all the CUs that hold an object
21931 VEC (offset_type) *cu_indices;
21934 /* The symbol table. This is a power-of-2-sized hash table. */
21935 struct mapped_symtab
21937 offset_type n_elements;
21939 struct symtab_index_entry **data;
21942 /* Hash function for a symtab_index_entry. */
21945 hash_symtab_entry (const void *e)
21947 const struct symtab_index_entry *entry = e;
21948 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
21949 sizeof (offset_type) * VEC_length (offset_type,
21950 entry->cu_indices),
21954 /* Equality function for a symtab_index_entry. */
21957 eq_symtab_entry (const void *a, const void *b)
21959 const struct symtab_index_entry *ea = a;
21960 const struct symtab_index_entry *eb = b;
21961 int len = VEC_length (offset_type, ea->cu_indices);
21962 if (len != VEC_length (offset_type, eb->cu_indices))
21964 return !memcmp (VEC_address (offset_type, ea->cu_indices),
21965 VEC_address (offset_type, eb->cu_indices),
21966 sizeof (offset_type) * len);
21969 /* Destroy a symtab_index_entry. */
21972 delete_symtab_entry (void *p)
21974 struct symtab_index_entry *entry = p;
21975 VEC_free (offset_type, entry->cu_indices);
21979 /* Create a hash table holding symtab_index_entry objects. */
21982 create_symbol_hash_table (void)
21984 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
21985 delete_symtab_entry, xcalloc, xfree);
21988 /* Create a new mapped symtab object. */
21990 static struct mapped_symtab *
21991 create_mapped_symtab (void)
21993 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
21994 symtab->n_elements = 0;
21995 symtab->size = 1024;
21996 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
22000 /* Destroy a mapped_symtab. */
22003 cleanup_mapped_symtab (void *p)
22005 struct mapped_symtab *symtab = p;
22006 /* The contents of the array are freed when the other hash table is
22008 xfree (symtab->data);
22012 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22015 Function is used only during write_hash_table so no index format backward
22016 compatibility is needed. */
22018 static struct symtab_index_entry **
22019 find_slot (struct mapped_symtab *symtab, const char *name)
22021 offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name);
22023 index = hash & (symtab->size - 1);
22024 step = ((hash * 17) & (symtab->size - 1)) | 1;
22028 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
22029 return &symtab->data[index];
22030 index = (index + step) & (symtab->size - 1);
22034 /* Expand SYMTAB's hash table. */
22037 hash_expand (struct mapped_symtab *symtab)
22039 offset_type old_size = symtab->size;
22041 struct symtab_index_entry **old_entries = symtab->data;
22044 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
22046 for (i = 0; i < old_size; ++i)
22048 if (old_entries[i])
22050 struct symtab_index_entry **slot = find_slot (symtab,
22051 old_entries[i]->name);
22052 *slot = old_entries[i];
22056 xfree (old_entries);
22059 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22060 CU_INDEX is the index of the CU in which the symbol appears.
22061 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22064 add_index_entry (struct mapped_symtab *symtab, const char *name,
22065 int is_static, gdb_index_symbol_kind kind,
22066 offset_type cu_index)
22068 struct symtab_index_entry **slot;
22069 offset_type cu_index_and_attrs;
22071 ++symtab->n_elements;
22072 if (4 * symtab->n_elements / 3 >= symtab->size)
22073 hash_expand (symtab);
22075 slot = find_slot (symtab, name);
22078 *slot = XNEW (struct symtab_index_entry);
22079 (*slot)->name = name;
22080 /* index_offset is set later. */
22081 (*slot)->cu_indices = NULL;
22084 cu_index_and_attrs = 0;
22085 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index);
22086 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static);
22087 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind);
22089 /* We don't want to record an index value twice as we want to avoid the
22091 We process all global symbols and then all static symbols
22092 (which would allow us to avoid the duplication by only having to check
22093 the last entry pushed), but a symbol could have multiple kinds in one CU.
22094 To keep things simple we don't worry about the duplication here and
22095 sort and uniqufy the list after we've processed all symbols. */
22096 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs);
22099 /* qsort helper routine for uniquify_cu_indices. */
22102 offset_type_compare (const void *ap, const void *bp)
22104 offset_type a = *(offset_type *) ap;
22105 offset_type b = *(offset_type *) bp;
22107 return (a > b) - (b > a);
22110 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22113 uniquify_cu_indices (struct mapped_symtab *symtab)
22117 for (i = 0; i < symtab->size; ++i)
22119 struct symtab_index_entry *entry = symtab->data[i];
22122 && entry->cu_indices != NULL)
22124 unsigned int next_to_insert, next_to_check;
22125 offset_type last_value;
22127 qsort (VEC_address (offset_type, entry->cu_indices),
22128 VEC_length (offset_type, entry->cu_indices),
22129 sizeof (offset_type), offset_type_compare);
22131 last_value = VEC_index (offset_type, entry->cu_indices, 0);
22132 next_to_insert = 1;
22133 for (next_to_check = 1;
22134 next_to_check < VEC_length (offset_type, entry->cu_indices);
22137 if (VEC_index (offset_type, entry->cu_indices, next_to_check)
22140 last_value = VEC_index (offset_type, entry->cu_indices,
22142 VEC_replace (offset_type, entry->cu_indices, next_to_insert,
22147 VEC_truncate (offset_type, entry->cu_indices, next_to_insert);
22152 /* Add a vector of indices to the constant pool. */
22155 add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool,
22156 struct symtab_index_entry *entry)
22160 slot = htab_find_slot (symbol_hash_table, entry, INSERT);
22163 offset_type len = VEC_length (offset_type, entry->cu_indices);
22164 offset_type val = MAYBE_SWAP (len);
22169 entry->index_offset = obstack_object_size (cpool);
22171 obstack_grow (cpool, &val, sizeof (val));
22173 VEC_iterate (offset_type, entry->cu_indices, i, iter);
22176 val = MAYBE_SWAP (iter);
22177 obstack_grow (cpool, &val, sizeof (val));
22182 struct symtab_index_entry *old_entry = *slot;
22183 entry->index_offset = old_entry->index_offset;
22186 return entry->index_offset;
22189 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22190 constant pool entries going into the obstack CPOOL. */
22193 write_hash_table (struct mapped_symtab *symtab,
22194 struct obstack *output, struct obstack *cpool)
22197 htab_t symbol_hash_table;
22200 symbol_hash_table = create_symbol_hash_table ();
22201 str_table = create_strtab ();
22203 /* We add all the index vectors to the constant pool first, to
22204 ensure alignment is ok. */
22205 for (i = 0; i < symtab->size; ++i)
22207 if (symtab->data[i])
22208 add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]);
22211 /* Now write out the hash table. */
22212 for (i = 0; i < symtab->size; ++i)
22214 offset_type str_off, vec_off;
22216 if (symtab->data[i])
22218 str_off = add_string (str_table, cpool, symtab->data[i]->name);
22219 vec_off = symtab->data[i]->index_offset;
22223 /* While 0 is a valid constant pool index, it is not valid
22224 to have 0 for both offsets. */
22229 str_off = MAYBE_SWAP (str_off);
22230 vec_off = MAYBE_SWAP (vec_off);
22232 obstack_grow (output, &str_off, sizeof (str_off));
22233 obstack_grow (output, &vec_off, sizeof (vec_off));
22236 htab_delete (str_table);
22237 htab_delete (symbol_hash_table);
22240 /* Struct to map psymtab to CU index in the index file. */
22241 struct psymtab_cu_index_map
22243 struct partial_symtab *psymtab;
22244 unsigned int cu_index;
22248 hash_psymtab_cu_index (const void *item)
22250 const struct psymtab_cu_index_map *map = item;
22252 return htab_hash_pointer (map->psymtab);
22256 eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs)
22258 const struct psymtab_cu_index_map *lhs = item_lhs;
22259 const struct psymtab_cu_index_map *rhs = item_rhs;
22261 return lhs->psymtab == rhs->psymtab;
22264 /* Helper struct for building the address table. */
22265 struct addrmap_index_data
22267 struct objfile *objfile;
22268 struct obstack *addr_obstack;
22269 htab_t cu_index_htab;
22271 /* Non-zero if the previous_* fields are valid.
22272 We can't write an entry until we see the next entry (since it is only then
22273 that we know the end of the entry). */
22274 int previous_valid;
22275 /* Index of the CU in the table of all CUs in the index file. */
22276 unsigned int previous_cu_index;
22277 /* Start address of the CU. */
22278 CORE_ADDR previous_cu_start;
22281 /* Write an address entry to OBSTACK. */
22284 add_address_entry (struct objfile *objfile, struct obstack *obstack,
22285 CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
22287 offset_type cu_index_to_write;
22289 CORE_ADDR baseaddr;
22291 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
22293 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr);
22294 obstack_grow (obstack, addr, 8);
22295 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr);
22296 obstack_grow (obstack, addr, 8);
22297 cu_index_to_write = MAYBE_SWAP (cu_index);
22298 obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type));
22301 /* Worker function for traversing an addrmap to build the address table. */
22304 add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj)
22306 struct addrmap_index_data *data = datap;
22307 struct partial_symtab *pst = obj;
22309 if (data->previous_valid)
22310 add_address_entry (data->objfile, data->addr_obstack,
22311 data->previous_cu_start, start_addr,
22312 data->previous_cu_index);
22314 data->previous_cu_start = start_addr;
22317 struct psymtab_cu_index_map find_map, *map;
22318 find_map.psymtab = pst;
22319 map = htab_find (data->cu_index_htab, &find_map);
22320 gdb_assert (map != NULL);
22321 data->previous_cu_index = map->cu_index;
22322 data->previous_valid = 1;
22325 data->previous_valid = 0;
22330 /* Write OBJFILE's address map to OBSTACK.
22331 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22332 in the index file. */
22335 write_address_map (struct objfile *objfile, struct obstack *obstack,
22336 htab_t cu_index_htab)
22338 struct addrmap_index_data addrmap_index_data;
22340 /* When writing the address table, we have to cope with the fact that
22341 the addrmap iterator only provides the start of a region; we have to
22342 wait until the next invocation to get the start of the next region. */
22344 addrmap_index_data.objfile = objfile;
22345 addrmap_index_data.addr_obstack = obstack;
22346 addrmap_index_data.cu_index_htab = cu_index_htab;
22347 addrmap_index_data.previous_valid = 0;
22349 addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker,
22350 &addrmap_index_data);
22352 /* It's highly unlikely the last entry (end address = 0xff...ff)
22353 is valid, but we should still handle it.
22354 The end address is recorded as the start of the next region, but that
22355 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22357 if (addrmap_index_data.previous_valid)
22358 add_address_entry (objfile, obstack,
22359 addrmap_index_data.previous_cu_start, (CORE_ADDR) -1,
22360 addrmap_index_data.previous_cu_index);
22363 /* Return the symbol kind of PSYM. */
22365 static gdb_index_symbol_kind
22366 symbol_kind (struct partial_symbol *psym)
22368 domain_enum domain = PSYMBOL_DOMAIN (psym);
22369 enum address_class aclass = PSYMBOL_CLASS (psym);
22377 return GDB_INDEX_SYMBOL_KIND_FUNCTION;
22379 return GDB_INDEX_SYMBOL_KIND_TYPE;
22381 case LOC_CONST_BYTES:
22382 case LOC_OPTIMIZED_OUT:
22384 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
22386 /* Note: It's currently impossible to recognize psyms as enum values
22387 short of reading the type info. For now punt. */
22388 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
22390 /* There are other LOC_FOO values that one might want to classify
22391 as variables, but dwarf2read.c doesn't currently use them. */
22392 return GDB_INDEX_SYMBOL_KIND_OTHER;
22394 case STRUCT_DOMAIN:
22395 return GDB_INDEX_SYMBOL_KIND_TYPE;
22397 return GDB_INDEX_SYMBOL_KIND_OTHER;
22401 /* Add a list of partial symbols to SYMTAB. */
22404 write_psymbols (struct mapped_symtab *symtab,
22406 struct partial_symbol **psymp,
22408 offset_type cu_index,
22411 for (; count-- > 0; ++psymp)
22413 struct partial_symbol *psym = *psymp;
22416 if (SYMBOL_LANGUAGE (psym) == language_ada)
22417 error (_("Ada is not currently supported by the index"));
22419 /* Only add a given psymbol once. */
22420 slot = htab_find_slot (psyms_seen, psym, INSERT);
22423 gdb_index_symbol_kind kind = symbol_kind (psym);
22426 add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym),
22427 is_static, kind, cu_index);
22432 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22433 exception if there is an error. */
22436 write_obstack (FILE *file, struct obstack *obstack)
22438 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
22440 != obstack_object_size (obstack))
22441 error (_("couldn't data write to file"));
22444 /* Unlink a file if the argument is not NULL. */
22447 unlink_if_set (void *p)
22449 char **filename = p;
22451 unlink (*filename);
22454 /* A helper struct used when iterating over debug_types. */
22455 struct signatured_type_index_data
22457 struct objfile *objfile;
22458 struct mapped_symtab *symtab;
22459 struct obstack *types_list;
22464 /* A helper function that writes a single signatured_type to an
22468 write_one_signatured_type (void **slot, void *d)
22470 struct signatured_type_index_data *info = d;
22471 struct signatured_type *entry = (struct signatured_type *) *slot;
22472 struct partial_symtab *psymtab = entry->per_cu.v.psymtab;
22475 write_psymbols (info->symtab,
22477 info->objfile->global_psymbols.list
22478 + psymtab->globals_offset,
22479 psymtab->n_global_syms, info->cu_index,
22481 write_psymbols (info->symtab,
22483 info->objfile->static_psymbols.list
22484 + psymtab->statics_offset,
22485 psymtab->n_static_syms, info->cu_index,
22488 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
22489 entry->per_cu.offset.sect_off);
22490 obstack_grow (info->types_list, val, 8);
22491 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
22492 entry->type_offset_in_tu.cu_off);
22493 obstack_grow (info->types_list, val, 8);
22494 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
22495 obstack_grow (info->types_list, val, 8);
22502 /* Recurse into all "included" dependencies and write their symbols as
22503 if they appeared in this psymtab. */
22506 recursively_write_psymbols (struct objfile *objfile,
22507 struct partial_symtab *psymtab,
22508 struct mapped_symtab *symtab,
22510 offset_type cu_index)
22514 for (i = 0; i < psymtab->number_of_dependencies; ++i)
22515 if (psymtab->dependencies[i]->user != NULL)
22516 recursively_write_psymbols (objfile, psymtab->dependencies[i],
22517 symtab, psyms_seen, cu_index);
22519 write_psymbols (symtab,
22521 objfile->global_psymbols.list + psymtab->globals_offset,
22522 psymtab->n_global_syms, cu_index,
22524 write_psymbols (symtab,
22526 objfile->static_psymbols.list + psymtab->statics_offset,
22527 psymtab->n_static_syms, cu_index,
22531 /* Create an index file for OBJFILE in the directory DIR. */
22534 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
22536 struct cleanup *cleanup;
22537 char *filename, *cleanup_filename;
22538 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
22539 struct obstack cu_list, types_cu_list;
22542 struct mapped_symtab *symtab;
22543 offset_type val, size_of_contents, total_len;
22546 htab_t cu_index_htab;
22547 struct psymtab_cu_index_map *psymtab_cu_index_map;
22549 if (dwarf2_per_objfile->using_index)
22550 error (_("Cannot use an index to create the index"));
22552 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1)
22553 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22555 if (!objfile->psymtabs || !objfile->psymtabs_addrmap)
22558 if (stat (objfile_name (objfile), &st) < 0)
22559 perror_with_name (objfile_name (objfile));
22561 filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)),
22562 INDEX_SUFFIX, (char *) NULL);
22563 cleanup = make_cleanup (xfree, filename);
22565 out_file = gdb_fopen_cloexec (filename, "wb");
22567 error (_("Can't open `%s' for writing"), filename);
22569 cleanup_filename = filename;
22570 make_cleanup (unlink_if_set, &cleanup_filename);
22572 symtab = create_mapped_symtab ();
22573 make_cleanup (cleanup_mapped_symtab, symtab);
22575 obstack_init (&addr_obstack);
22576 make_cleanup_obstack_free (&addr_obstack);
22578 obstack_init (&cu_list);
22579 make_cleanup_obstack_free (&cu_list);
22581 obstack_init (&types_cu_list);
22582 make_cleanup_obstack_free (&types_cu_list);
22584 psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer,
22585 NULL, xcalloc, xfree);
22586 make_cleanup_htab_delete (psyms_seen);
22588 /* While we're scanning CU's create a table that maps a psymtab pointer
22589 (which is what addrmap records) to its index (which is what is recorded
22590 in the index file). This will later be needed to write the address
22592 cu_index_htab = htab_create_alloc (100,
22593 hash_psymtab_cu_index,
22594 eq_psymtab_cu_index,
22595 NULL, xcalloc, xfree);
22596 make_cleanup_htab_delete (cu_index_htab);
22597 psymtab_cu_index_map = (struct psymtab_cu_index_map *)
22598 xmalloc (sizeof (struct psymtab_cu_index_map)
22599 * dwarf2_per_objfile->n_comp_units);
22600 make_cleanup (xfree, psymtab_cu_index_map);
22602 /* The CU list is already sorted, so we don't need to do additional
22603 work here. Also, the debug_types entries do not appear in
22604 all_comp_units, but only in their own hash table. */
22605 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
22607 struct dwarf2_per_cu_data *per_cu
22608 = dwarf2_per_objfile->all_comp_units[i];
22609 struct partial_symtab *psymtab = per_cu->v.psymtab;
22611 struct psymtab_cu_index_map *map;
22614 /* CU of a shared file from 'dwz -m' may be unused by this main file.
22615 It may be referenced from a local scope but in such case it does not
22616 need to be present in .gdb_index. */
22617 if (psymtab == NULL)
22620 if (psymtab->user == NULL)
22621 recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i);
22623 map = &psymtab_cu_index_map[i];
22624 map->psymtab = psymtab;
22626 slot = htab_find_slot (cu_index_htab, map, INSERT);
22627 gdb_assert (slot != NULL);
22628 gdb_assert (*slot == NULL);
22631 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
22632 per_cu->offset.sect_off);
22633 obstack_grow (&cu_list, val, 8);
22634 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
22635 obstack_grow (&cu_list, val, 8);
22638 /* Dump the address map. */
22639 write_address_map (objfile, &addr_obstack, cu_index_htab);
22641 /* Write out the .debug_type entries, if any. */
22642 if (dwarf2_per_objfile->signatured_types)
22644 struct signatured_type_index_data sig_data;
22646 sig_data.objfile = objfile;
22647 sig_data.symtab = symtab;
22648 sig_data.types_list = &types_cu_list;
22649 sig_data.psyms_seen = psyms_seen;
22650 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
22651 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
22652 write_one_signatured_type, &sig_data);
22655 /* Now that we've processed all symbols we can shrink their cu_indices
22657 uniquify_cu_indices (symtab);
22659 obstack_init (&constant_pool);
22660 make_cleanup_obstack_free (&constant_pool);
22661 obstack_init (&symtab_obstack);
22662 make_cleanup_obstack_free (&symtab_obstack);
22663 write_hash_table (symtab, &symtab_obstack, &constant_pool);
22665 obstack_init (&contents);
22666 make_cleanup_obstack_free (&contents);
22667 size_of_contents = 6 * sizeof (offset_type);
22668 total_len = size_of_contents;
22670 /* The version number. */
22671 val = MAYBE_SWAP (8);
22672 obstack_grow (&contents, &val, sizeof (val));
22674 /* The offset of the CU list from the start of the file. */
22675 val = MAYBE_SWAP (total_len);
22676 obstack_grow (&contents, &val, sizeof (val));
22677 total_len += obstack_object_size (&cu_list);
22679 /* The offset of the types CU list from the start of the file. */
22680 val = MAYBE_SWAP (total_len);
22681 obstack_grow (&contents, &val, sizeof (val));
22682 total_len += obstack_object_size (&types_cu_list);
22684 /* The offset of the address table from the start of the file. */
22685 val = MAYBE_SWAP (total_len);
22686 obstack_grow (&contents, &val, sizeof (val));
22687 total_len += obstack_object_size (&addr_obstack);
22689 /* The offset of the symbol table from the start of the file. */
22690 val = MAYBE_SWAP (total_len);
22691 obstack_grow (&contents, &val, sizeof (val));
22692 total_len += obstack_object_size (&symtab_obstack);
22694 /* The offset of the constant pool from the start of the file. */
22695 val = MAYBE_SWAP (total_len);
22696 obstack_grow (&contents, &val, sizeof (val));
22697 total_len += obstack_object_size (&constant_pool);
22699 gdb_assert (obstack_object_size (&contents) == size_of_contents);
22701 write_obstack (out_file, &contents);
22702 write_obstack (out_file, &cu_list);
22703 write_obstack (out_file, &types_cu_list);
22704 write_obstack (out_file, &addr_obstack);
22705 write_obstack (out_file, &symtab_obstack);
22706 write_obstack (out_file, &constant_pool);
22710 /* We want to keep the file, so we set cleanup_filename to NULL
22711 here. See unlink_if_set. */
22712 cleanup_filename = NULL;
22714 do_cleanups (cleanup);
22717 /* Implementation of the `save gdb-index' command.
22719 Note that the file format used by this command is documented in the
22720 GDB manual. Any changes here must be documented there. */
22723 save_gdb_index_command (char *arg, int from_tty)
22725 struct objfile *objfile;
22728 error (_("usage: save gdb-index DIRECTORY"));
22730 ALL_OBJFILES (objfile)
22734 /* If the objfile does not correspond to an actual file, skip it. */
22735 if (stat (objfile_name (objfile), &st) < 0)
22738 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
22739 if (dwarf2_per_objfile)
22741 volatile struct gdb_exception except;
22743 TRY_CATCH (except, RETURN_MASK_ERROR)
22745 write_psymtabs_to_index (objfile, arg);
22747 if (except.reason < 0)
22748 exception_fprintf (gdb_stderr, except,
22749 _("Error while writing index for `%s': "),
22750 objfile_name (objfile));
22757 int dwarf2_always_disassemble;
22760 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
22761 struct cmd_list_element *c, const char *value)
22763 fprintf_filtered (file,
22764 _("Whether to always disassemble "
22765 "DWARF expressions is %s.\n"),
22770 show_check_physname (struct ui_file *file, int from_tty,
22771 struct cmd_list_element *c, const char *value)
22773 fprintf_filtered (file,
22774 _("Whether to check \"physname\" is %s.\n"),
22778 void _initialize_dwarf2_read (void);
22781 _initialize_dwarf2_read (void)
22783 struct cmd_list_element *c;
22785 dwarf2_objfile_data_key
22786 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
22788 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
22789 Set DWARF 2 specific variables.\n\
22790 Configure DWARF 2 variables such as the cache size"),
22791 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
22792 0/*allow-unknown*/, &maintenance_set_cmdlist);
22794 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
22795 Show DWARF 2 specific variables\n\
22796 Show DWARF 2 variables such as the cache size"),
22797 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
22798 0/*allow-unknown*/, &maintenance_show_cmdlist);
22800 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
22801 &dwarf2_max_cache_age, _("\
22802 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
22803 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
22804 A higher limit means that cached compilation units will be stored\n\
22805 in memory longer, and more total memory will be used. Zero disables\n\
22806 caching, which can slow down startup."),
22808 show_dwarf2_max_cache_age,
22809 &set_dwarf2_cmdlist,
22810 &show_dwarf2_cmdlist);
22812 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
22813 &dwarf2_always_disassemble, _("\
22814 Set whether `info address' always disassembles DWARF expressions."), _("\
22815 Show whether `info address' always disassembles DWARF expressions."), _("\
22816 When enabled, DWARF expressions are always printed in an assembly-like\n\
22817 syntax. When disabled, expressions will be printed in a more\n\
22818 conversational style, when possible."),
22820 show_dwarf2_always_disassemble,
22821 &set_dwarf2_cmdlist,
22822 &show_dwarf2_cmdlist);
22824 add_setshow_zuinteger_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\
22825 Set debugging of the dwarf2 reader."), _("\
22826 Show debugging of the dwarf2 reader."), _("\
22827 When enabled (non-zero), debugging messages are printed during dwarf2\n\
22828 reading and symtab expansion. A value of 1 (one) provides basic\n\
22829 information. A value greater than 1 provides more verbose information."),
22832 &setdebuglist, &showdebuglist);
22834 add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
22835 Set debugging of the dwarf2 DIE reader."), _("\
22836 Show debugging of the dwarf2 DIE reader."), _("\
22837 When enabled (non-zero), DIEs are dumped after they are read in.\n\
22838 The value is the maximum depth to print."),
22841 &setdebuglist, &showdebuglist);
22843 add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\
22844 Set cross-checking of \"physname\" code against demangler."), _("\
22845 Show cross-checking of \"physname\" code against demangler."), _("\
22846 When enabled, GDB's internal \"physname\" code is checked against\n\
22848 NULL, show_check_physname,
22849 &setdebuglist, &showdebuglist);
22851 add_setshow_boolean_cmd ("use-deprecated-index-sections",
22852 no_class, &use_deprecated_index_sections, _("\
22853 Set whether to use deprecated gdb_index sections."), _("\
22854 Show whether to use deprecated gdb_index sections."), _("\
22855 When enabled, deprecated .gdb_index sections are used anyway.\n\
22856 Normally they are ignored either because of a missing feature or\n\
22857 performance issue.\n\
22858 Warning: This option must be enabled before gdb reads the file."),
22861 &setlist, &showlist);
22863 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
22865 Save a gdb-index file.\n\
22866 Usage: save gdb-index DIRECTORY"),
22868 set_cmd_completer (c, filename_completer);
22870 dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED,
22871 &dwarf2_locexpr_funcs);
22872 dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED,
22873 &dwarf2_loclist_funcs);
22875 dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK,
22876 &dwarf2_block_frame_base_locexpr_funcs);
22877 dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK,
22878 &dwarf2_block_frame_base_loclist_funcs);