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 .debug_types-related CUs (TUs).
239 This is stored in malloc space because we may realloc it. */
240 struct signatured_type **all_type_units;
242 /* The number of entries in all_type_unit_groups. */
243 int n_type_unit_groups;
245 /* Table of type unit groups.
246 This exists to make it easy to iterate over all CUs and TU groups. */
247 struct type_unit_group **all_type_unit_groups;
249 /* Table of struct type_unit_group objects.
250 The hash key is the DW_AT_stmt_list value. */
251 htab_t type_unit_groups;
253 /* A table mapping .debug_types signatures to its signatured_type entry.
254 This is NULL if the .debug_types section hasn't been read in yet. */
255 htab_t signatured_types;
257 /* Type unit statistics, to see how well the scaling improvements
261 int nr_uniq_abbrev_tables;
263 int nr_symtab_sharers;
264 int nr_stmt_less_type_units;
267 /* A chain of compilation units that are currently read in, so that
268 they can be freed later. */
269 struct dwarf2_per_cu_data *read_in_chain;
271 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
272 This is NULL if the table hasn't been allocated yet. */
275 /* Non-zero if we've check for whether there is a DWP file. */
278 /* The DWP file if there is one, or NULL. */
279 struct dwp_file *dwp_file;
281 /* The shared '.dwz' file, if one exists. This is used when the
282 original data was compressed using 'dwz -m'. */
283 struct dwz_file *dwz_file;
285 /* A flag indicating wether this objfile has a section loaded at a
287 int has_section_at_zero;
289 /* True if we are using the mapped index,
290 or we are faking it for OBJF_READNOW's sake. */
291 unsigned char using_index;
293 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
294 struct mapped_index *index_table;
296 /* When using index_table, this keeps track of all quick_file_names entries.
297 TUs typically share line table entries with a CU, so we maintain a
298 separate table of all line table entries to support the sharing.
299 Note that while there can be way more TUs than CUs, we've already
300 sorted all the TUs into "type unit groups", grouped by their
301 DW_AT_stmt_list value. Therefore the only sharing done here is with a
302 CU and its associated TU group if there is one. */
303 htab_t quick_file_names_table;
305 /* Set during partial symbol reading, to prevent queueing of full
307 int reading_partial_symbols;
309 /* Table mapping type DIEs to their struct type *.
310 This is NULL if not allocated yet.
311 The mapping is done via (CU/TU + DIE offset) -> type. */
312 htab_t die_type_hash;
314 /* The CUs we recently read. */
315 VEC (dwarf2_per_cu_ptr) *just_read_cus;
318 static struct dwarf2_per_objfile *dwarf2_per_objfile;
320 /* Default names of the debugging sections. */
322 /* Note that if the debugging section has been compressed, it might
323 have a name like .zdebug_info. */
325 static const struct dwarf2_debug_sections dwarf2_elf_names =
327 { ".debug_info", ".zdebug_info" },
328 { ".debug_abbrev", ".zdebug_abbrev" },
329 { ".debug_line", ".zdebug_line" },
330 { ".debug_loc", ".zdebug_loc" },
331 { ".debug_macinfo", ".zdebug_macinfo" },
332 { ".debug_macro", ".zdebug_macro" },
333 { ".debug_str", ".zdebug_str" },
334 { ".debug_ranges", ".zdebug_ranges" },
335 { ".debug_types", ".zdebug_types" },
336 { ".debug_addr", ".zdebug_addr" },
337 { ".debug_frame", ".zdebug_frame" },
338 { ".eh_frame", NULL },
339 { ".gdb_index", ".zgdb_index" },
343 /* List of DWO/DWP sections. */
345 static const struct dwop_section_names
347 struct dwarf2_section_names abbrev_dwo;
348 struct dwarf2_section_names info_dwo;
349 struct dwarf2_section_names line_dwo;
350 struct dwarf2_section_names loc_dwo;
351 struct dwarf2_section_names macinfo_dwo;
352 struct dwarf2_section_names macro_dwo;
353 struct dwarf2_section_names str_dwo;
354 struct dwarf2_section_names str_offsets_dwo;
355 struct dwarf2_section_names types_dwo;
356 struct dwarf2_section_names cu_index;
357 struct dwarf2_section_names tu_index;
361 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
362 { ".debug_info.dwo", ".zdebug_info.dwo" },
363 { ".debug_line.dwo", ".zdebug_line.dwo" },
364 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
365 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
366 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
367 { ".debug_str.dwo", ".zdebug_str.dwo" },
368 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
369 { ".debug_types.dwo", ".zdebug_types.dwo" },
370 { ".debug_cu_index", ".zdebug_cu_index" },
371 { ".debug_tu_index", ".zdebug_tu_index" },
374 /* local data types */
376 /* The data in a compilation unit header, after target2host
377 translation, looks like this. */
378 struct comp_unit_head
382 unsigned char addr_size;
383 unsigned char signed_addr_p;
384 sect_offset abbrev_offset;
386 /* Size of file offsets; either 4 or 8. */
387 unsigned int offset_size;
389 /* Size of the length field; either 4 or 12. */
390 unsigned int initial_length_size;
392 /* Offset to the first byte of this compilation unit header in the
393 .debug_info section, for resolving relative reference dies. */
396 /* Offset to first die in this cu from the start of the cu.
397 This will be the first byte following the compilation unit header. */
398 cu_offset first_die_offset;
401 /* Type used for delaying computation of method physnames.
402 See comments for compute_delayed_physnames. */
403 struct delayed_method_info
405 /* The type to which the method is attached, i.e., its parent class. */
408 /* The index of the method in the type's function fieldlists. */
411 /* The index of the method in the fieldlist. */
414 /* The name of the DIE. */
417 /* The DIE associated with this method. */
418 struct die_info *die;
421 typedef struct delayed_method_info delayed_method_info;
422 DEF_VEC_O (delayed_method_info);
424 /* Internal state when decoding a particular compilation unit. */
427 /* The objfile containing this compilation unit. */
428 struct objfile *objfile;
430 /* The header of the compilation unit. */
431 struct comp_unit_head header;
433 /* Base address of this compilation unit. */
434 CORE_ADDR base_address;
436 /* Non-zero if base_address has been set. */
439 /* The language we are debugging. */
440 enum language language;
441 const struct language_defn *language_defn;
443 const char *producer;
445 /* The generic symbol table building routines have separate lists for
446 file scope symbols and all all other scopes (local scopes). So
447 we need to select the right one to pass to add_symbol_to_list().
448 We do it by keeping a pointer to the correct list in list_in_scope.
450 FIXME: The original dwarf code just treated the file scope as the
451 first local scope, and all other local scopes as nested local
452 scopes, and worked fine. Check to see if we really need to
453 distinguish these in buildsym.c. */
454 struct pending **list_in_scope;
456 /* The abbrev table for this CU.
457 Normally this points to the abbrev table in the objfile.
458 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
459 struct abbrev_table *abbrev_table;
461 /* Hash table holding all the loaded partial DIEs
462 with partial_die->offset.SECT_OFF as hash. */
465 /* Storage for things with the same lifetime as this read-in compilation
466 unit, including partial DIEs. */
467 struct obstack comp_unit_obstack;
469 /* When multiple dwarf2_cu structures are living in memory, this field
470 chains them all together, so that they can be released efficiently.
471 We will probably also want a generation counter so that most-recently-used
472 compilation units are cached... */
473 struct dwarf2_per_cu_data *read_in_chain;
475 /* Backlink to our per_cu entry. */
476 struct dwarf2_per_cu_data *per_cu;
478 /* How many compilation units ago was this CU last referenced? */
481 /* A hash table of DIE cu_offset for following references with
482 die_info->offset.sect_off as hash. */
485 /* Full DIEs if read in. */
486 struct die_info *dies;
488 /* A set of pointers to dwarf2_per_cu_data objects for compilation
489 units referenced by this one. Only set during full symbol processing;
490 partial symbol tables do not have dependencies. */
493 /* Header data from the line table, during full symbol processing. */
494 struct line_header *line_header;
496 /* A list of methods which need to have physnames computed
497 after all type information has been read. */
498 VEC (delayed_method_info) *method_list;
500 /* To be copied to symtab->call_site_htab. */
501 htab_t call_site_htab;
503 /* Non-NULL if this CU came from a DWO file.
504 There is an invariant here that is important to remember:
505 Except for attributes copied from the top level DIE in the "main"
506 (or "stub") file in preparation for reading the DWO file
507 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
508 Either there isn't a DWO file (in which case this is NULL and the point
509 is moot), or there is and either we're not going to read it (in which
510 case this is NULL) or there is and we are reading it (in which case this
512 struct dwo_unit *dwo_unit;
514 /* The DW_AT_addr_base attribute if present, zero otherwise
515 (zero is a valid value though).
516 Note this value comes from the stub CU/TU's DIE. */
519 /* The DW_AT_ranges_base attribute if present, zero otherwise
520 (zero is a valid value though).
521 Note this value comes from the stub CU/TU's DIE.
522 Also note that the value is zero in the non-DWO case so this value can
523 be used without needing to know whether DWO files are in use or not.
524 N.B. This does not apply to DW_AT_ranges appearing in
525 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
526 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
527 DW_AT_ranges_base *would* have to be applied, and we'd have to care
528 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
529 ULONGEST ranges_base;
531 /* Mark used when releasing cached dies. */
532 unsigned int mark : 1;
534 /* This CU references .debug_loc. See the symtab->locations_valid field.
535 This test is imperfect as there may exist optimized debug code not using
536 any location list and still facing inlining issues if handled as
537 unoptimized code. For a future better test see GCC PR other/32998. */
538 unsigned int has_loclist : 1;
540 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
541 if all the producer_is_* fields are valid. This information is cached
542 because profiling CU expansion showed excessive time spent in
543 producer_is_gxx_lt_4_6. */
544 unsigned int checked_producer : 1;
545 unsigned int producer_is_gxx_lt_4_6 : 1;
546 unsigned int producer_is_gcc_lt_4_3 : 1;
547 unsigned int producer_is_icc : 1;
549 /* When set, the file that we're processing is known to have
550 debugging info for C++ namespaces. GCC 3.3.x did not produce
551 this information, but later versions do. */
553 unsigned int processing_has_namespace_info : 1;
556 /* Persistent data held for a compilation unit, even when not
557 processing it. We put a pointer to this structure in the
558 read_symtab_private field of the psymtab. */
560 struct dwarf2_per_cu_data
562 /* The start offset and length of this compilation unit.
563 NOTE: Unlike comp_unit_head.length, this length includes
565 If the DIE refers to a DWO file, this is always of the original die,
570 /* Flag indicating this compilation unit will be read in before
571 any of the current compilation units are processed. */
572 unsigned int queued : 1;
574 /* This flag will be set when reading partial DIEs if we need to load
575 absolutely all DIEs for this compilation unit, instead of just the ones
576 we think are interesting. It gets set if we look for a DIE in the
577 hash table and don't find it. */
578 unsigned int load_all_dies : 1;
580 /* Non-zero if this CU is from .debug_types.
581 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
583 unsigned int is_debug_types : 1;
585 /* Non-zero if this CU is from the .dwz file. */
586 unsigned int is_dwz : 1;
588 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
589 This flag is only valid if is_debug_types is true.
590 We can't read a CU directly from a DWO file: There are required
591 attributes in the stub. */
592 unsigned int reading_dwo_directly : 1;
594 /* Non-zero if the TU has been read.
595 This is used to assist the "Stay in DWO Optimization" for Fission:
596 When reading a DWO, it's faster to read TUs from the DWO instead of
597 fetching them from random other DWOs (due to comdat folding).
598 If the TU has already been read, the optimization is unnecessary
599 (and unwise - we don't want to change where gdb thinks the TU lives
601 This flag is only valid if is_debug_types is true. */
602 unsigned int tu_read : 1;
604 /* The section this CU/TU lives in.
605 If the DIE refers to a DWO file, this is always the original die,
607 struct dwarf2_section_info *section;
609 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
610 of the CU cache it gets reset to NULL again. */
611 struct dwarf2_cu *cu;
613 /* The corresponding objfile.
614 Normally we can get the objfile from dwarf2_per_objfile.
615 However we can enter this file with just a "per_cu" handle. */
616 struct objfile *objfile;
618 /* When using partial symbol tables, the 'psymtab' field is active.
619 Otherwise the 'quick' field is active. */
622 /* The partial symbol table associated with this compilation unit,
623 or NULL for unread partial units. */
624 struct partial_symtab *psymtab;
626 /* Data needed by the "quick" functions. */
627 struct dwarf2_per_cu_quick_data *quick;
630 /* The CUs we import using DW_TAG_imported_unit. This is filled in
631 while reading psymtabs, used to compute the psymtab dependencies,
632 and then cleared. Then it is filled in again while reading full
633 symbols, and only deleted when the objfile is destroyed.
635 This is also used to work around a difference between the way gold
636 generates .gdb_index version <=7 and the way gdb does. Arguably this
637 is a gold bug. For symbols coming from TUs, gold records in the index
638 the CU that includes the TU instead of the TU itself. This breaks
639 dw2_lookup_symbol: It assumes that if the index says symbol X lives
640 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
641 will find X. Alas TUs live in their own symtab, so after expanding CU Y
642 we need to look in TU Z to find X. Fortunately, this is akin to
643 DW_TAG_imported_unit, so we just use the same mechanism: For
644 .gdb_index version <=7 this also records the TUs that the CU referred
645 to. Concurrently with this change gdb was modified to emit version 8
646 indices so we only pay a price for gold generated indices.
647 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
648 VEC (dwarf2_per_cu_ptr) *imported_symtabs;
651 /* Entry in the signatured_types hash table. */
653 struct signatured_type
655 /* The "per_cu" object of this type.
656 This struct is used iff per_cu.is_debug_types.
657 N.B.: This is the first member so that it's easy to convert pointers
659 struct dwarf2_per_cu_data per_cu;
661 /* The type's signature. */
664 /* Offset in the TU of the type's DIE, as read from the TU header.
665 If this TU is a DWO stub and the definition lives in a DWO file
666 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
667 cu_offset type_offset_in_tu;
669 /* Offset in the section of the type's DIE.
670 If the definition lives in a DWO file, this is the offset in the
671 .debug_types.dwo section.
672 The value is zero until the actual value is known.
673 Zero is otherwise not a valid section offset. */
674 sect_offset type_offset_in_section;
676 /* Type units are grouped by their DW_AT_stmt_list entry so that they
677 can share them. This points to the containing symtab. */
678 struct type_unit_group *type_unit_group;
681 The first time we encounter this type we fully read it in and install it
682 in the symbol tables. Subsequent times we only need the type. */
685 /* Containing DWO unit.
686 This field is valid iff per_cu.reading_dwo_directly. */
687 struct dwo_unit *dwo_unit;
690 typedef struct signatured_type *sig_type_ptr;
691 DEF_VEC_P (sig_type_ptr);
693 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
694 This includes type_unit_group and quick_file_names. */
696 struct stmt_list_hash
698 /* The DWO unit this table is from or NULL if there is none. */
699 struct dwo_unit *dwo_unit;
701 /* Offset in .debug_line or .debug_line.dwo. */
702 sect_offset line_offset;
705 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
706 an object of this type. */
708 struct type_unit_group
710 /* dwarf2read.c's main "handle" on a TU symtab.
711 To simplify things we create an artificial CU that "includes" all the
712 type units using this stmt_list so that the rest of the code still has
713 a "per_cu" handle on the symtab.
714 This PER_CU is recognized by having no section. */
715 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
716 struct dwarf2_per_cu_data per_cu;
718 /* The TUs that share this DW_AT_stmt_list entry.
719 This is added to while parsing type units to build partial symtabs,
720 and is deleted afterwards and not used again. */
721 VEC (sig_type_ptr) *tus;
723 /* The primary symtab.
724 Type units in a group needn't all be defined in the same source file,
725 so we create an essentially anonymous symtab as the primary symtab. */
726 struct symtab *primary_symtab;
728 /* The data used to construct the hash key. */
729 struct stmt_list_hash hash;
731 /* The number of symtabs from the line header.
732 The value here must match line_header.num_file_names. */
733 unsigned int num_symtabs;
735 /* The symbol tables for this TU (obtained from the files listed in
737 WARNING: The order of entries here must match the order of entries
738 in the line header. After the first TU using this type_unit_group, the
739 line header for the subsequent TUs is recreated from this. This is done
740 because we need to use the same symtabs for each TU using the same
741 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
742 there's no guarantee the line header doesn't have duplicate entries. */
743 struct symtab **symtabs;
746 /* These sections are what may appear in a (real or virtual) DWO file. */
750 struct dwarf2_section_info abbrev;
751 struct dwarf2_section_info line;
752 struct dwarf2_section_info loc;
753 struct dwarf2_section_info macinfo;
754 struct dwarf2_section_info macro;
755 struct dwarf2_section_info str;
756 struct dwarf2_section_info str_offsets;
757 /* In the case of a virtual DWO file, these two are unused. */
758 struct dwarf2_section_info info;
759 VEC (dwarf2_section_info_def) *types;
762 /* CUs/TUs in DWP/DWO files. */
766 /* Backlink to the containing struct dwo_file. */
767 struct dwo_file *dwo_file;
769 /* The "id" that distinguishes this CU/TU.
770 .debug_info calls this "dwo_id", .debug_types calls this "signature".
771 Since signatures came first, we stick with it for consistency. */
774 /* The section this CU/TU lives in, in the DWO file. */
775 struct dwarf2_section_info *section;
777 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
781 /* For types, offset in the type's DIE of the type defined by this TU. */
782 cu_offset type_offset_in_tu;
785 /* include/dwarf2.h defines the DWP section codes.
786 It defines a max value but it doesn't define a min value, which we
787 use for error checking, so provide one. */
789 enum dwp_v2_section_ids
794 /* Data for one DWO file.
796 This includes virtual DWO files (a virtual DWO file is a DWO file as it
797 appears in a DWP file). DWP files don't really have DWO files per se -
798 comdat folding of types "loses" the DWO file they came from, and from
799 a high level view DWP files appear to contain a mass of random types.
800 However, to maintain consistency with the non-DWP case we pretend DWP
801 files contain virtual DWO files, and we assign each TU with one virtual
802 DWO file (generally based on the line and abbrev section offsets -
803 a heuristic that seems to work in practice). */
807 /* The DW_AT_GNU_dwo_name attribute.
808 For virtual DWO files the name is constructed from the section offsets
809 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
810 from related CU+TUs. */
811 const char *dwo_name;
813 /* The DW_AT_comp_dir attribute. */
814 const char *comp_dir;
816 /* The bfd, when the file is open. Otherwise this is NULL.
817 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
820 /* The sections that make up this DWO file.
821 Remember that for virtual DWO files in DWP V2, these are virtual
822 sections (for lack of a better name). */
823 struct dwo_sections sections;
825 /* The CU in the file.
826 We only support one because having more than one requires hacking the
827 dwo_name of each to match, which is highly unlikely to happen.
828 Doing this means all TUs can share comp_dir: We also assume that
829 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
832 /* Table of TUs in the file.
833 Each element is a struct dwo_unit. */
837 /* These sections are what may appear in a DWP file. */
841 /* These are used by both DWP version 1 and 2. */
842 struct dwarf2_section_info str;
843 struct dwarf2_section_info cu_index;
844 struct dwarf2_section_info tu_index;
846 /* These are only used by DWP version 2 files.
847 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
848 sections are referenced by section number, and are not recorded here.
849 In DWP version 2 there is at most one copy of all these sections, each
850 section being (effectively) comprised of the concatenation of all of the
851 individual sections that exist in the version 1 format.
852 To keep the code simple we treat each of these concatenated pieces as a
853 section itself (a virtual section?). */
854 struct dwarf2_section_info abbrev;
855 struct dwarf2_section_info info;
856 struct dwarf2_section_info line;
857 struct dwarf2_section_info loc;
858 struct dwarf2_section_info macinfo;
859 struct dwarf2_section_info macro;
860 struct dwarf2_section_info str_offsets;
861 struct dwarf2_section_info types;
864 /* These sections are what may appear in a virtual DWO file in DWP version 1.
865 A virtual DWO file is a DWO file as it appears in a DWP file. */
867 struct virtual_v1_dwo_sections
869 struct dwarf2_section_info abbrev;
870 struct dwarf2_section_info line;
871 struct dwarf2_section_info loc;
872 struct dwarf2_section_info macinfo;
873 struct dwarf2_section_info macro;
874 struct dwarf2_section_info str_offsets;
875 /* Each DWP hash table entry records one CU or one TU.
876 That is recorded here, and copied to dwo_unit.section. */
877 struct dwarf2_section_info info_or_types;
880 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
881 In version 2, the sections of the DWO files are concatenated together
882 and stored in one section of that name. Thus each ELF section contains
883 several "virtual" sections. */
885 struct virtual_v2_dwo_sections
887 bfd_size_type abbrev_offset;
888 bfd_size_type abbrev_size;
890 bfd_size_type line_offset;
891 bfd_size_type line_size;
893 bfd_size_type loc_offset;
894 bfd_size_type loc_size;
896 bfd_size_type macinfo_offset;
897 bfd_size_type macinfo_size;
899 bfd_size_type macro_offset;
900 bfd_size_type macro_size;
902 bfd_size_type str_offsets_offset;
903 bfd_size_type str_offsets_size;
905 /* Each DWP hash table entry records one CU or one TU.
906 That is recorded here, and copied to dwo_unit.section. */
907 bfd_size_type info_or_types_offset;
908 bfd_size_type info_or_types_size;
911 /* Contents of DWP hash tables. */
913 struct dwp_hash_table
915 uint32_t version, nr_columns;
916 uint32_t nr_units, nr_slots;
917 const gdb_byte *hash_table, *unit_table;
922 const gdb_byte *indices;
926 /* This is indexed by column number and gives the id of the section
928 #define MAX_NR_V2_DWO_SECTIONS \
929 (1 /* .debug_info or .debug_types */ \
930 + 1 /* .debug_abbrev */ \
931 + 1 /* .debug_line */ \
932 + 1 /* .debug_loc */ \
933 + 1 /* .debug_str_offsets */ \
934 + 1 /* .debug_macro or .debug_macinfo */)
935 int section_ids[MAX_NR_V2_DWO_SECTIONS];
936 const gdb_byte *offsets;
937 const gdb_byte *sizes;
942 /* Data for one DWP file. */
946 /* Name of the file. */
949 /* File format version. */
955 /* Section info for this file. */
956 struct dwp_sections sections;
958 /* Table of CUs in the file. */
959 const struct dwp_hash_table *cus;
961 /* Table of TUs in the file. */
962 const struct dwp_hash_table *tus;
964 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
968 /* Table to map ELF section numbers to their sections.
969 This is only needed for the DWP V1 file format. */
970 unsigned int num_sections;
971 asection **elf_sections;
974 /* This represents a '.dwz' file. */
978 /* A dwz file can only contain a few sections. */
979 struct dwarf2_section_info abbrev;
980 struct dwarf2_section_info info;
981 struct dwarf2_section_info str;
982 struct dwarf2_section_info line;
983 struct dwarf2_section_info macro;
984 struct dwarf2_section_info gdb_index;
990 /* Struct used to pass misc. parameters to read_die_and_children, et
991 al. which are used for both .debug_info and .debug_types dies.
992 All parameters here are unchanging for the life of the call. This
993 struct exists to abstract away the constant parameters of die reading. */
995 struct die_reader_specs
997 /* The bfd of die_section. */
1000 /* The CU of the DIE we are parsing. */
1001 struct dwarf2_cu *cu;
1003 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1004 struct dwo_file *dwo_file;
1006 /* The section the die comes from.
1007 This is either .debug_info or .debug_types, or the .dwo variants. */
1008 struct dwarf2_section_info *die_section;
1010 /* die_section->buffer. */
1011 const gdb_byte *buffer;
1013 /* The end of the buffer. */
1014 const gdb_byte *buffer_end;
1016 /* The value of the DW_AT_comp_dir attribute. */
1017 const char *comp_dir;
1020 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1021 typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader,
1022 const gdb_byte *info_ptr,
1023 struct die_info *comp_unit_die,
1027 /* The line number information for a compilation unit (found in the
1028 .debug_line section) begins with a "statement program header",
1029 which contains the following information. */
1032 unsigned int total_length;
1033 unsigned short version;
1034 unsigned int header_length;
1035 unsigned char minimum_instruction_length;
1036 unsigned char maximum_ops_per_instruction;
1037 unsigned char default_is_stmt;
1039 unsigned char line_range;
1040 unsigned char opcode_base;
1042 /* standard_opcode_lengths[i] is the number of operands for the
1043 standard opcode whose value is i. This means that
1044 standard_opcode_lengths[0] is unused, and the last meaningful
1045 element is standard_opcode_lengths[opcode_base - 1]. */
1046 unsigned char *standard_opcode_lengths;
1048 /* The include_directories table. NOTE! These strings are not
1049 allocated with xmalloc; instead, they are pointers into
1050 debug_line_buffer. If you try to free them, `free' will get
1052 unsigned int num_include_dirs, include_dirs_size;
1053 const char **include_dirs;
1055 /* The file_names table. NOTE! These strings are not allocated
1056 with xmalloc; instead, they are pointers into debug_line_buffer.
1057 Don't try to free them directly. */
1058 unsigned int num_file_names, file_names_size;
1062 unsigned int dir_index;
1063 unsigned int mod_time;
1064 unsigned int length;
1065 int included_p; /* Non-zero if referenced by the Line Number Program. */
1066 struct symtab *symtab; /* The associated symbol table, if any. */
1069 /* The start and end of the statement program following this
1070 header. These point into dwarf2_per_objfile->line_buffer. */
1071 const gdb_byte *statement_program_start, *statement_program_end;
1074 /* When we construct a partial symbol table entry we only
1075 need this much information. */
1076 struct partial_die_info
1078 /* Offset of this DIE. */
1081 /* DWARF-2 tag for this DIE. */
1082 ENUM_BITFIELD(dwarf_tag) tag : 16;
1084 /* Assorted flags describing the data found in this DIE. */
1085 unsigned int has_children : 1;
1086 unsigned int is_external : 1;
1087 unsigned int is_declaration : 1;
1088 unsigned int has_type : 1;
1089 unsigned int has_specification : 1;
1090 unsigned int has_pc_info : 1;
1091 unsigned int may_be_inlined : 1;
1093 /* Flag set if the SCOPE field of this structure has been
1095 unsigned int scope_set : 1;
1097 /* Flag set if the DIE has a byte_size attribute. */
1098 unsigned int has_byte_size : 1;
1100 /* Flag set if any of the DIE's children are template arguments. */
1101 unsigned int has_template_arguments : 1;
1103 /* Flag set if fixup_partial_die has been called on this die. */
1104 unsigned int fixup_called : 1;
1106 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1107 unsigned int is_dwz : 1;
1109 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1110 unsigned int spec_is_dwz : 1;
1112 /* The name of this DIE. Normally the value of DW_AT_name, but
1113 sometimes a default name for unnamed DIEs. */
1116 /* The linkage name, if present. */
1117 const char *linkage_name;
1119 /* The scope to prepend to our children. This is generally
1120 allocated on the comp_unit_obstack, so will disappear
1121 when this compilation unit leaves the cache. */
1124 /* Some data associated with the partial DIE. The tag determines
1125 which field is live. */
1128 /* The location description associated with this DIE, if any. */
1129 struct dwarf_block *locdesc;
1130 /* The offset of an import, for DW_TAG_imported_unit. */
1134 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1138 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1139 DW_AT_sibling, if any. */
1140 /* NOTE: This member isn't strictly necessary, read_partial_die could
1141 return DW_AT_sibling values to its caller load_partial_dies. */
1142 const gdb_byte *sibling;
1144 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1145 DW_AT_specification (or DW_AT_abstract_origin or
1146 DW_AT_extension). */
1147 sect_offset spec_offset;
1149 /* Pointers to this DIE's parent, first child, and next sibling,
1151 struct partial_die_info *die_parent, *die_child, *die_sibling;
1154 /* This data structure holds the information of an abbrev. */
1157 unsigned int number; /* number identifying abbrev */
1158 enum dwarf_tag tag; /* dwarf tag */
1159 unsigned short has_children; /* boolean */
1160 unsigned short num_attrs; /* number of attributes */
1161 struct attr_abbrev *attrs; /* an array of attribute descriptions */
1162 struct abbrev_info *next; /* next in chain */
1167 ENUM_BITFIELD(dwarf_attribute) name : 16;
1168 ENUM_BITFIELD(dwarf_form) form : 16;
1171 /* Size of abbrev_table.abbrev_hash_table. */
1172 #define ABBREV_HASH_SIZE 121
1174 /* Top level data structure to contain an abbreviation table. */
1178 /* Where the abbrev table came from.
1179 This is used as a sanity check when the table is used. */
1182 /* Storage for the abbrev table. */
1183 struct obstack abbrev_obstack;
1185 /* Hash table of abbrevs.
1186 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1187 It could be statically allocated, but the previous code didn't so we
1189 struct abbrev_info **abbrevs;
1192 /* Attributes have a name and a value. */
1195 ENUM_BITFIELD(dwarf_attribute) name : 16;
1196 ENUM_BITFIELD(dwarf_form) form : 15;
1198 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1199 field should be in u.str (existing only for DW_STRING) but it is kept
1200 here for better struct attribute alignment. */
1201 unsigned int string_is_canonical : 1;
1206 struct dwarf_block *blk;
1215 /* This data structure holds a complete die structure. */
1218 /* DWARF-2 tag for this DIE. */
1219 ENUM_BITFIELD(dwarf_tag) tag : 16;
1221 /* Number of attributes */
1222 unsigned char num_attrs;
1224 /* True if we're presently building the full type name for the
1225 type derived from this DIE. */
1226 unsigned char building_fullname : 1;
1228 /* True if this die is in process. PR 16581. */
1229 unsigned char in_process : 1;
1232 unsigned int abbrev;
1234 /* Offset in .debug_info or .debug_types section. */
1237 /* The dies in a compilation unit form an n-ary tree. PARENT
1238 points to this die's parent; CHILD points to the first child of
1239 this node; and all the children of a given node are chained
1240 together via their SIBLING fields. */
1241 struct die_info *child; /* Its first child, if any. */
1242 struct die_info *sibling; /* Its next sibling, if any. */
1243 struct die_info *parent; /* Its parent, if any. */
1245 /* An array of attributes, with NUM_ATTRS elements. There may be
1246 zero, but it's not common and zero-sized arrays are not
1247 sufficiently portable C. */
1248 struct attribute attrs[1];
1251 /* Get at parts of an attribute structure. */
1253 #define DW_STRING(attr) ((attr)->u.str)
1254 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1255 #define DW_UNSND(attr) ((attr)->u.unsnd)
1256 #define DW_BLOCK(attr) ((attr)->u.blk)
1257 #define DW_SND(attr) ((attr)->u.snd)
1258 #define DW_ADDR(attr) ((attr)->u.addr)
1259 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1261 /* Blocks are a bunch of untyped bytes. */
1266 /* Valid only if SIZE is not zero. */
1267 const gdb_byte *data;
1270 #ifndef ATTR_ALLOC_CHUNK
1271 #define ATTR_ALLOC_CHUNK 4
1274 /* Allocate fields for structs, unions and enums in this size. */
1275 #ifndef DW_FIELD_ALLOC_CHUNK
1276 #define DW_FIELD_ALLOC_CHUNK 4
1279 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1280 but this would require a corresponding change in unpack_field_as_long
1282 static int bits_per_byte = 8;
1284 /* The routines that read and process dies for a C struct or C++ class
1285 pass lists of data member fields and lists of member function fields
1286 in an instance of a field_info structure, as defined below. */
1289 /* List of data member and baseclasses fields. */
1292 struct nextfield *next;
1297 *fields, *baseclasses;
1299 /* Number of fields (including baseclasses). */
1302 /* Number of baseclasses. */
1305 /* Set if the accesibility of one of the fields is not public. */
1306 int non_public_fields;
1308 /* Member function fields array, entries are allocated in the order they
1309 are encountered in the object file. */
1312 struct nextfnfield *next;
1313 struct fn_field fnfield;
1317 /* Member function fieldlist array, contains name of possibly overloaded
1318 member function, number of overloaded member functions and a pointer
1319 to the head of the member function field chain. */
1324 struct nextfnfield *head;
1328 /* Number of entries in the fnfieldlists array. */
1331 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1332 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1333 struct typedef_field_list
1335 struct typedef_field field;
1336 struct typedef_field_list *next;
1338 *typedef_field_list;
1339 unsigned typedef_field_list_count;
1342 /* One item on the queue of compilation units to read in full symbols
1344 struct dwarf2_queue_item
1346 struct dwarf2_per_cu_data *per_cu;
1347 enum language pretend_language;
1348 struct dwarf2_queue_item *next;
1351 /* The current queue. */
1352 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
1354 /* Loaded secondary compilation units are kept in memory until they
1355 have not been referenced for the processing of this many
1356 compilation units. Set this to zero to disable caching. Cache
1357 sizes of up to at least twenty will improve startup time for
1358 typical inter-CU-reference binaries, at an obvious memory cost. */
1359 static int dwarf2_max_cache_age = 5;
1361 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
1362 struct cmd_list_element *c, const char *value)
1364 fprintf_filtered (file, _("The upper bound on the age of cached "
1365 "dwarf2 compilation units is %s.\n"),
1369 /* local function prototypes */
1371 static const char *get_section_name (const struct dwarf2_section_info *);
1373 static const char *get_section_file_name (const struct dwarf2_section_info *);
1375 static void dwarf2_locate_sections (bfd *, asection *, void *);
1377 static void dwarf2_find_base_address (struct die_info *die,
1378 struct dwarf2_cu *cu);
1380 static struct partial_symtab *create_partial_symtab
1381 (struct dwarf2_per_cu_data *per_cu, const char *name);
1383 static void dwarf2_build_psymtabs_hard (struct objfile *);
1385 static void scan_partial_symbols (struct partial_die_info *,
1386 CORE_ADDR *, CORE_ADDR *,
1387 int, struct dwarf2_cu *);
1389 static void add_partial_symbol (struct partial_die_info *,
1390 struct dwarf2_cu *);
1392 static void add_partial_namespace (struct partial_die_info *pdi,
1393 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1394 int need_pc, struct dwarf2_cu *cu);
1396 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
1397 CORE_ADDR *highpc, int need_pc,
1398 struct dwarf2_cu *cu);
1400 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
1401 struct dwarf2_cu *cu);
1403 static void add_partial_subprogram (struct partial_die_info *pdi,
1404 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1405 int need_pc, struct dwarf2_cu *cu);
1407 static void dwarf2_read_symtab (struct partial_symtab *,
1410 static void psymtab_to_symtab_1 (struct partial_symtab *);
1412 static struct abbrev_info *abbrev_table_lookup_abbrev
1413 (const struct abbrev_table *, unsigned int);
1415 static struct abbrev_table *abbrev_table_read_table
1416 (struct dwarf2_section_info *, sect_offset);
1418 static void abbrev_table_free (struct abbrev_table *);
1420 static void abbrev_table_free_cleanup (void *);
1422 static void dwarf2_read_abbrevs (struct dwarf2_cu *,
1423 struct dwarf2_section_info *);
1425 static void dwarf2_free_abbrev_table (void *);
1427 static unsigned int peek_abbrev_code (bfd *, const gdb_byte *);
1429 static struct partial_die_info *load_partial_dies
1430 (const struct die_reader_specs *, const gdb_byte *, int);
1432 static const gdb_byte *read_partial_die (const struct die_reader_specs *,
1433 struct partial_die_info *,
1434 struct abbrev_info *,
1438 static struct partial_die_info *find_partial_die (sect_offset, int,
1439 struct dwarf2_cu *);
1441 static void fixup_partial_die (struct partial_die_info *,
1442 struct dwarf2_cu *);
1444 static const gdb_byte *read_attribute (const struct die_reader_specs *,
1445 struct attribute *, struct attr_abbrev *,
1448 static unsigned int read_1_byte (bfd *, const gdb_byte *);
1450 static int read_1_signed_byte (bfd *, const gdb_byte *);
1452 static unsigned int read_2_bytes (bfd *, const gdb_byte *);
1454 static unsigned int read_4_bytes (bfd *, const gdb_byte *);
1456 static ULONGEST read_8_bytes (bfd *, const gdb_byte *);
1458 static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *,
1461 static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *);
1463 static LONGEST read_checked_initial_length_and_offset
1464 (bfd *, const gdb_byte *, const struct comp_unit_head *,
1465 unsigned int *, unsigned int *);
1467 static LONGEST read_offset (bfd *, const gdb_byte *,
1468 const struct comp_unit_head *,
1471 static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int);
1473 static sect_offset read_abbrev_offset (struct dwarf2_section_info *,
1476 static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int);
1478 static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *);
1480 static const char *read_indirect_string (bfd *, const gdb_byte *,
1481 const struct comp_unit_head *,
1484 static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST);
1486 static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *);
1488 static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *);
1490 static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *,
1494 static const char *read_str_index (const struct die_reader_specs *reader,
1495 struct dwarf2_cu *cu, ULONGEST str_index);
1497 static void set_cu_language (unsigned int, struct dwarf2_cu *);
1499 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
1500 struct dwarf2_cu *);
1502 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
1505 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
1506 struct dwarf2_cu *cu);
1508 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
1510 static struct die_info *die_specification (struct die_info *die,
1511 struct dwarf2_cu **);
1513 static void free_line_header (struct line_header *lh);
1515 static struct line_header *dwarf_decode_line_header (unsigned int offset,
1516 struct dwarf2_cu *cu);
1518 static void dwarf_decode_lines (struct line_header *, const char *,
1519 struct dwarf2_cu *, struct partial_symtab *,
1522 static void dwarf2_start_subfile (const char *, const char *, const char *);
1524 static void dwarf2_start_symtab (struct dwarf2_cu *,
1525 const char *, const char *, CORE_ADDR);
1527 static struct symbol *new_symbol (struct die_info *, struct type *,
1528 struct dwarf2_cu *);
1530 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1531 struct dwarf2_cu *, struct symbol *);
1533 static void dwarf2_const_value (const struct attribute *, struct symbol *,
1534 struct dwarf2_cu *);
1536 static void dwarf2_const_value_attr (const struct attribute *attr,
1539 struct obstack *obstack,
1540 struct dwarf2_cu *cu, LONGEST *value,
1541 const gdb_byte **bytes,
1542 struct dwarf2_locexpr_baton **baton);
1544 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1546 static int need_gnat_info (struct dwarf2_cu *);
1548 static struct type *die_descriptive_type (struct die_info *,
1549 struct dwarf2_cu *);
1551 static void set_descriptive_type (struct type *, struct die_info *,
1552 struct dwarf2_cu *);
1554 static struct type *die_containing_type (struct die_info *,
1555 struct dwarf2_cu *);
1557 static struct type *lookup_die_type (struct die_info *, const struct attribute *,
1558 struct dwarf2_cu *);
1560 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1562 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1564 static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1566 static char *typename_concat (struct obstack *obs, const char *prefix,
1567 const char *suffix, int physname,
1568 struct dwarf2_cu *cu);
1570 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1572 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1574 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1576 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1578 static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu);
1580 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1581 struct dwarf2_cu *, struct partial_symtab *);
1583 static int dwarf2_get_pc_bounds (struct die_info *,
1584 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1585 struct partial_symtab *);
1587 static void get_scope_pc_bounds (struct die_info *,
1588 CORE_ADDR *, CORE_ADDR *,
1589 struct dwarf2_cu *);
1591 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1592 CORE_ADDR, struct dwarf2_cu *);
1594 static void dwarf2_add_field (struct field_info *, struct die_info *,
1595 struct dwarf2_cu *);
1597 static void dwarf2_attach_fields_to_type (struct field_info *,
1598 struct type *, struct dwarf2_cu *);
1600 static void dwarf2_add_member_fn (struct field_info *,
1601 struct die_info *, struct type *,
1602 struct dwarf2_cu *);
1604 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1606 struct dwarf2_cu *);
1608 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1610 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1612 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1614 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1616 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1618 static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu);
1620 static struct type *read_module_type (struct die_info *die,
1621 struct dwarf2_cu *cu);
1623 static const char *namespace_name (struct die_info *die,
1624 int *is_anonymous, struct dwarf2_cu *);
1626 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1628 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1630 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1631 struct dwarf2_cu *);
1633 static struct die_info *read_die_and_siblings_1
1634 (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **,
1637 static struct die_info *read_die_and_siblings (const struct die_reader_specs *,
1638 const gdb_byte *info_ptr,
1639 const gdb_byte **new_info_ptr,
1640 struct die_info *parent);
1642 static const gdb_byte *read_full_die_1 (const struct die_reader_specs *,
1643 struct die_info **, const gdb_byte *,
1646 static const gdb_byte *read_full_die (const struct die_reader_specs *,
1647 struct die_info **, const gdb_byte *,
1650 static void process_die (struct die_info *, struct dwarf2_cu *);
1652 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *,
1655 static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1657 static const char *dwarf2_full_name (const char *name,
1658 struct die_info *die,
1659 struct dwarf2_cu *cu);
1661 static const char *dwarf2_physname (const char *name, struct die_info *die,
1662 struct dwarf2_cu *cu);
1664 static struct die_info *dwarf2_extension (struct die_info *die,
1665 struct dwarf2_cu **);
1667 static const char *dwarf_tag_name (unsigned int);
1669 static const char *dwarf_attr_name (unsigned int);
1671 static const char *dwarf_form_name (unsigned int);
1673 static char *dwarf_bool_name (unsigned int);
1675 static const char *dwarf_type_encoding_name (unsigned int);
1677 static struct die_info *sibling_die (struct die_info *);
1679 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1681 static void dump_die_for_error (struct die_info *);
1683 static void dump_die_1 (struct ui_file *, int level, int max_level,
1686 /*static*/ void dump_die (struct die_info *, int max_level);
1688 static void store_in_ref_table (struct die_info *,
1689 struct dwarf2_cu *);
1691 static sect_offset dwarf2_get_ref_die_offset (const struct attribute *);
1693 static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int);
1695 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1696 const struct attribute *,
1697 struct dwarf2_cu **);
1699 static struct die_info *follow_die_ref (struct die_info *,
1700 const struct attribute *,
1701 struct dwarf2_cu **);
1703 static struct die_info *follow_die_sig (struct die_info *,
1704 const struct attribute *,
1705 struct dwarf2_cu **);
1707 static struct type *get_signatured_type (struct die_info *, ULONGEST,
1708 struct dwarf2_cu *);
1710 static struct type *get_DW_AT_signature_type (struct die_info *,
1711 const struct attribute *,
1712 struct dwarf2_cu *);
1714 static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu);
1716 static void read_signatured_type (struct signatured_type *);
1718 static struct type_unit_group *get_type_unit_group
1719 (struct dwarf2_cu *, const struct attribute *);
1721 static void build_type_unit_groups (die_reader_func_ftype *, void *);
1723 /* memory allocation interface */
1725 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1727 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1729 static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int,
1732 static int attr_form_is_block (const struct attribute *);
1734 static int attr_form_is_section_offset (const struct attribute *);
1736 static int attr_form_is_constant (const struct attribute *);
1738 static int attr_form_is_ref (const struct attribute *);
1740 static void fill_in_loclist_baton (struct dwarf2_cu *cu,
1741 struct dwarf2_loclist_baton *baton,
1742 const struct attribute *attr);
1744 static void dwarf2_symbol_mark_computed (const struct attribute *attr,
1746 struct dwarf2_cu *cu,
1749 static const gdb_byte *skip_one_die (const struct die_reader_specs *reader,
1750 const gdb_byte *info_ptr,
1751 struct abbrev_info *abbrev);
1753 static void free_stack_comp_unit (void *);
1755 static hashval_t partial_die_hash (const void *item);
1757 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1759 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1760 (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile);
1762 static void init_one_comp_unit (struct dwarf2_cu *cu,
1763 struct dwarf2_per_cu_data *per_cu);
1765 static void prepare_one_comp_unit (struct dwarf2_cu *cu,
1766 struct die_info *comp_unit_die,
1767 enum language pretend_language);
1769 static void free_heap_comp_unit (void *);
1771 static void free_cached_comp_units (void *);
1773 static void age_cached_comp_units (void);
1775 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *);
1777 static struct type *set_die_type (struct die_info *, struct type *,
1778 struct dwarf2_cu *);
1780 static void create_all_comp_units (struct objfile *);
1782 static int create_all_type_units (struct objfile *);
1784 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1787 static void process_full_comp_unit (struct dwarf2_per_cu_data *,
1790 static void process_full_type_unit (struct dwarf2_per_cu_data *,
1793 static void dwarf2_add_dependence (struct dwarf2_cu *,
1794 struct dwarf2_per_cu_data *);
1796 static void dwarf2_mark (struct dwarf2_cu *);
1798 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1800 static struct type *get_die_type_at_offset (sect_offset,
1801 struct dwarf2_per_cu_data *);
1803 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1805 static void dwarf2_release_queue (void *dummy);
1807 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1808 enum language pretend_language);
1810 static void process_queue (void);
1812 static void find_file_and_directory (struct die_info *die,
1813 struct dwarf2_cu *cu,
1814 const char **name, const char **comp_dir);
1816 static char *file_full_name (int file, struct line_header *lh,
1817 const char *comp_dir);
1819 static const gdb_byte *read_and_check_comp_unit_head
1820 (struct comp_unit_head *header,
1821 struct dwarf2_section_info *section,
1822 struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr,
1823 int is_debug_types_section);
1825 static void init_cutu_and_read_dies
1826 (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table,
1827 int use_existing_cu, int keep,
1828 die_reader_func_ftype *die_reader_func, void *data);
1830 static void init_cutu_and_read_dies_simple
1831 (struct dwarf2_per_cu_data *this_cu,
1832 die_reader_func_ftype *die_reader_func, void *data);
1834 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1836 static htab_t allocate_dwo_unit_table (struct objfile *objfile);
1838 static struct dwo_unit *lookup_dwo_unit_in_dwp
1839 (struct dwp_file *dwp_file, const char *comp_dir,
1840 ULONGEST signature, int is_debug_types);
1842 static struct dwp_file *get_dwp_file (void);
1844 static struct dwo_unit *lookup_dwo_comp_unit
1845 (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST);
1847 static struct dwo_unit *lookup_dwo_type_unit
1848 (struct signatured_type *, const char *, const char *);
1850 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *);
1852 static void free_dwo_file_cleanup (void *);
1854 static void process_cu_includes (void);
1856 static void check_producer (struct dwarf2_cu *cu);
1858 /* Various complaints about symbol reading that don't abort the process. */
1861 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1863 complaint (&symfile_complaints,
1864 _("statement list doesn't fit in .debug_line section"));
1868 dwarf2_debug_line_missing_file_complaint (void)
1870 complaint (&symfile_complaints,
1871 _(".debug_line section has line data without a file"));
1875 dwarf2_debug_line_missing_end_sequence_complaint (void)
1877 complaint (&symfile_complaints,
1878 _(".debug_line section has line "
1879 "program sequence without an end"));
1883 dwarf2_complex_location_expr_complaint (void)
1885 complaint (&symfile_complaints, _("location expression too complex"));
1889 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
1892 complaint (&symfile_complaints,
1893 _("const value length mismatch for '%s', got %d, expected %d"),
1898 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
1900 complaint (&symfile_complaints,
1901 _("debug info runs off end of %s section"
1903 get_section_name (section),
1904 get_section_file_name (section));
1908 dwarf2_macro_malformed_definition_complaint (const char *arg1)
1910 complaint (&symfile_complaints,
1911 _("macro debug info contains a "
1912 "malformed macro definition:\n`%s'"),
1917 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
1919 complaint (&symfile_complaints,
1920 _("invalid attribute class or form for '%s' in '%s'"),
1926 /* Convert VALUE between big- and little-endian. */
1928 byte_swap (offset_type value)
1932 result = (value & 0xff) << 24;
1933 result |= (value & 0xff00) << 8;
1934 result |= (value & 0xff0000) >> 8;
1935 result |= (value & 0xff000000) >> 24;
1939 #define MAYBE_SWAP(V) byte_swap (V)
1942 #define MAYBE_SWAP(V) (V)
1943 #endif /* WORDS_BIGENDIAN */
1945 /* The suffix for an index file. */
1946 #define INDEX_SUFFIX ".gdb-index"
1948 /* Try to locate the sections we need for DWARF 2 debugging
1949 information and return true if we have enough to do something.
1950 NAMES points to the dwarf2 section names, or is NULL if the standard
1951 ELF names are used. */
1954 dwarf2_has_info (struct objfile *objfile,
1955 const struct dwarf2_debug_sections *names)
1957 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1958 if (!dwarf2_per_objfile)
1960 /* Initialize per-objfile state. */
1961 struct dwarf2_per_objfile *data
1962 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1964 memset (data, 0, sizeof (*data));
1965 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1966 dwarf2_per_objfile = data;
1968 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections,
1970 dwarf2_per_objfile->objfile = objfile;
1972 return (!dwarf2_per_objfile->info.is_virtual
1973 && dwarf2_per_objfile->info.s.asection != NULL
1974 && !dwarf2_per_objfile->abbrev.is_virtual
1975 && dwarf2_per_objfile->abbrev.s.asection != NULL);
1978 /* Return the containing section of virtual section SECTION. */
1980 static struct dwarf2_section_info *
1981 get_containing_section (const struct dwarf2_section_info *section)
1983 gdb_assert (section->is_virtual);
1984 return section->s.containing_section;
1987 /* Return the bfd owner of SECTION. */
1990 get_section_bfd_owner (const struct dwarf2_section_info *section)
1992 if (section->is_virtual)
1994 section = get_containing_section (section);
1995 gdb_assert (!section->is_virtual);
1997 return section->s.asection->owner;
2000 /* Return the bfd section of SECTION.
2001 Returns NULL if the section is not present. */
2004 get_section_bfd_section (const struct dwarf2_section_info *section)
2006 if (section->is_virtual)
2008 section = get_containing_section (section);
2009 gdb_assert (!section->is_virtual);
2011 return section->s.asection;
2014 /* Return the name of SECTION. */
2017 get_section_name (const struct dwarf2_section_info *section)
2019 asection *sectp = get_section_bfd_section (section);
2021 gdb_assert (sectp != NULL);
2022 return bfd_section_name (get_section_bfd_owner (section), sectp);
2025 /* Return the name of the file SECTION is in. */
2028 get_section_file_name (const struct dwarf2_section_info *section)
2030 bfd *abfd = get_section_bfd_owner (section);
2032 return bfd_get_filename (abfd);
2035 /* Return the id of SECTION.
2036 Returns 0 if SECTION doesn't exist. */
2039 get_section_id (const struct dwarf2_section_info *section)
2041 asection *sectp = get_section_bfd_section (section);
2048 /* Return the flags of SECTION.
2049 SECTION (or containing section if this is a virtual section) must exist. */
2052 get_section_flags (const struct dwarf2_section_info *section)
2054 asection *sectp = get_section_bfd_section (section);
2056 gdb_assert (sectp != NULL);
2057 return bfd_get_section_flags (sectp->owner, sectp);
2060 /* When loading sections, we look either for uncompressed section or for
2061 compressed section names. */
2064 section_is_p (const char *section_name,
2065 const struct dwarf2_section_names *names)
2067 if (names->normal != NULL
2068 && strcmp (section_name, names->normal) == 0)
2070 if (names->compressed != NULL
2071 && strcmp (section_name, names->compressed) == 0)
2076 /* This function is mapped across the sections and remembers the
2077 offset and size of each of the debugging sections we are interested
2081 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames)
2083 const struct dwarf2_debug_sections *names;
2084 flagword aflag = bfd_get_section_flags (abfd, sectp);
2087 names = &dwarf2_elf_names;
2089 names = (const struct dwarf2_debug_sections *) vnames;
2091 if ((aflag & SEC_HAS_CONTENTS) == 0)
2094 else if (section_is_p (sectp->name, &names->info))
2096 dwarf2_per_objfile->info.s.asection = sectp;
2097 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
2099 else if (section_is_p (sectp->name, &names->abbrev))
2101 dwarf2_per_objfile->abbrev.s.asection = sectp;
2102 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
2104 else if (section_is_p (sectp->name, &names->line))
2106 dwarf2_per_objfile->line.s.asection = sectp;
2107 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
2109 else if (section_is_p (sectp->name, &names->loc))
2111 dwarf2_per_objfile->loc.s.asection = sectp;
2112 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
2114 else if (section_is_p (sectp->name, &names->macinfo))
2116 dwarf2_per_objfile->macinfo.s.asection = sectp;
2117 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
2119 else if (section_is_p (sectp->name, &names->macro))
2121 dwarf2_per_objfile->macro.s.asection = sectp;
2122 dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp);
2124 else if (section_is_p (sectp->name, &names->str))
2126 dwarf2_per_objfile->str.s.asection = sectp;
2127 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
2129 else if (section_is_p (sectp->name, &names->addr))
2131 dwarf2_per_objfile->addr.s.asection = sectp;
2132 dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp);
2134 else if (section_is_p (sectp->name, &names->frame))
2136 dwarf2_per_objfile->frame.s.asection = sectp;
2137 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
2139 else if (section_is_p (sectp->name, &names->eh_frame))
2141 dwarf2_per_objfile->eh_frame.s.asection = sectp;
2142 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
2144 else if (section_is_p (sectp->name, &names->ranges))
2146 dwarf2_per_objfile->ranges.s.asection = sectp;
2147 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
2149 else if (section_is_p (sectp->name, &names->types))
2151 struct dwarf2_section_info type_section;
2153 memset (&type_section, 0, sizeof (type_section));
2154 type_section.s.asection = sectp;
2155 type_section.size = bfd_get_section_size (sectp);
2157 VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types,
2160 else if (section_is_p (sectp->name, &names->gdb_index))
2162 dwarf2_per_objfile->gdb_index.s.asection = sectp;
2163 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
2166 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
2167 && bfd_section_vma (abfd, sectp) == 0)
2168 dwarf2_per_objfile->has_section_at_zero = 1;
2171 /* A helper function that decides whether a section is empty,
2175 dwarf2_section_empty_p (const struct dwarf2_section_info *section)
2177 if (section->is_virtual)
2178 return section->size == 0;
2179 return section->s.asection == NULL || section->size == 0;
2182 /* Read the contents of the section INFO.
2183 OBJFILE is the main object file, but not necessarily the file where
2184 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2186 If the section is compressed, uncompress it before returning. */
2189 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
2193 gdb_byte *buf, *retbuf;
2197 info->buffer = NULL;
2200 if (dwarf2_section_empty_p (info))
2203 sectp = get_section_bfd_section (info);
2205 /* If this is a virtual section we need to read in the real one first. */
2206 if (info->is_virtual)
2208 struct dwarf2_section_info *containing_section =
2209 get_containing_section (info);
2211 gdb_assert (sectp != NULL);
2212 if ((sectp->flags & SEC_RELOC) != 0)
2214 error (_("Dwarf Error: DWP format V2 with relocations is not"
2215 " supported in section %s [in module %s]"),
2216 get_section_name (info), get_section_file_name (info));
2218 dwarf2_read_section (objfile, containing_section);
2219 /* Other code should have already caught virtual sections that don't
2221 gdb_assert (info->virtual_offset + info->size
2222 <= containing_section->size);
2223 /* If the real section is empty or there was a problem reading the
2224 section we shouldn't get here. */
2225 gdb_assert (containing_section->buffer != NULL);
2226 info->buffer = containing_section->buffer + info->virtual_offset;
2230 /* If the section has relocations, we must read it ourselves.
2231 Otherwise we attach it to the BFD. */
2232 if ((sectp->flags & SEC_RELOC) == 0)
2234 info->buffer = gdb_bfd_map_section (sectp, &info->size);
2238 buf = obstack_alloc (&objfile->objfile_obstack, info->size);
2241 /* When debugging .o files, we may need to apply relocations; see
2242 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2243 We never compress sections in .o files, so we only need to
2244 try this when the section is not compressed. */
2245 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
2248 info->buffer = retbuf;
2252 abfd = get_section_bfd_owner (info);
2253 gdb_assert (abfd != NULL);
2255 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
2256 || bfd_bread (buf, info->size, abfd) != info->size)
2258 error (_("Dwarf Error: Can't read DWARF data"
2259 " in section %s [in module %s]"),
2260 bfd_section_name (abfd, sectp), bfd_get_filename (abfd));
2264 /* A helper function that returns the size of a section in a safe way.
2265 If you are positive that the section has been read before using the
2266 size, then it is safe to refer to the dwarf2_section_info object's
2267 "size" field directly. In other cases, you must call this
2268 function, because for compressed sections the size field is not set
2269 correctly until the section has been read. */
2271 static bfd_size_type
2272 dwarf2_section_size (struct objfile *objfile,
2273 struct dwarf2_section_info *info)
2276 dwarf2_read_section (objfile, info);
2280 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2284 dwarf2_get_section_info (struct objfile *objfile,
2285 enum dwarf2_section_enum sect,
2286 asection **sectp, const gdb_byte **bufp,
2287 bfd_size_type *sizep)
2289 struct dwarf2_per_objfile *data
2290 = objfile_data (objfile, dwarf2_objfile_data_key);
2291 struct dwarf2_section_info *info;
2293 /* We may see an objfile without any DWARF, in which case we just
2304 case DWARF2_DEBUG_FRAME:
2305 info = &data->frame;
2307 case DWARF2_EH_FRAME:
2308 info = &data->eh_frame;
2311 gdb_assert_not_reached ("unexpected section");
2314 dwarf2_read_section (objfile, info);
2316 *sectp = get_section_bfd_section (info);
2317 *bufp = info->buffer;
2318 *sizep = info->size;
2321 /* A helper function to find the sections for a .dwz file. */
2324 locate_dwz_sections (bfd *abfd, asection *sectp, void *arg)
2326 struct dwz_file *dwz_file = arg;
2328 /* Note that we only support the standard ELF names, because .dwz
2329 is ELF-only (at the time of writing). */
2330 if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev))
2332 dwz_file->abbrev.s.asection = sectp;
2333 dwz_file->abbrev.size = bfd_get_section_size (sectp);
2335 else if (section_is_p (sectp->name, &dwarf2_elf_names.info))
2337 dwz_file->info.s.asection = sectp;
2338 dwz_file->info.size = bfd_get_section_size (sectp);
2340 else if (section_is_p (sectp->name, &dwarf2_elf_names.str))
2342 dwz_file->str.s.asection = sectp;
2343 dwz_file->str.size = bfd_get_section_size (sectp);
2345 else if (section_is_p (sectp->name, &dwarf2_elf_names.line))
2347 dwz_file->line.s.asection = sectp;
2348 dwz_file->line.size = bfd_get_section_size (sectp);
2350 else if (section_is_p (sectp->name, &dwarf2_elf_names.macro))
2352 dwz_file->macro.s.asection = sectp;
2353 dwz_file->macro.size = bfd_get_section_size (sectp);
2355 else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index))
2357 dwz_file->gdb_index.s.asection = sectp;
2358 dwz_file->gdb_index.size = bfd_get_section_size (sectp);
2362 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2363 there is no .gnu_debugaltlink section in the file. Error if there
2364 is such a section but the file cannot be found. */
2366 static struct dwz_file *
2367 dwarf2_get_dwz_file (void)
2371 struct cleanup *cleanup;
2372 const char *filename;
2373 struct dwz_file *result;
2374 bfd_size_type buildid_len_arg;
2378 if (dwarf2_per_objfile->dwz_file != NULL)
2379 return dwarf2_per_objfile->dwz_file;
2381 bfd_set_error (bfd_error_no_error);
2382 data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd,
2383 &buildid_len_arg, &buildid);
2386 if (bfd_get_error () == bfd_error_no_error)
2388 error (_("could not read '.gnu_debugaltlink' section: %s"),
2389 bfd_errmsg (bfd_get_error ()));
2391 cleanup = make_cleanup (xfree, data);
2392 make_cleanup (xfree, buildid);
2394 buildid_len = (size_t) buildid_len_arg;
2396 filename = (const char *) data;
2397 if (!IS_ABSOLUTE_PATH (filename))
2399 char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile));
2402 make_cleanup (xfree, abs);
2403 abs = ldirname (abs);
2404 make_cleanup (xfree, abs);
2406 rel = concat (abs, SLASH_STRING, filename, (char *) NULL);
2407 make_cleanup (xfree, rel);
2411 /* First try the file name given in the section. If that doesn't
2412 work, try to use the build-id instead. */
2413 dwz_bfd = gdb_bfd_open (filename, gnutarget, -1);
2414 if (dwz_bfd != NULL)
2416 if (!build_id_verify (dwz_bfd, buildid_len, buildid))
2418 gdb_bfd_unref (dwz_bfd);
2423 if (dwz_bfd == NULL)
2424 dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid);
2426 if (dwz_bfd == NULL)
2427 error (_("could not find '.gnu_debugaltlink' file for %s"),
2428 objfile_name (dwarf2_per_objfile->objfile));
2430 result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack,
2432 result->dwz_bfd = dwz_bfd;
2434 bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result);
2436 do_cleanups (cleanup);
2438 gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, dwz_bfd);
2439 dwarf2_per_objfile->dwz_file = result;
2443 /* DWARF quick_symbols_functions support. */
2445 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2446 unique line tables, so we maintain a separate table of all .debug_line
2447 derived entries to support the sharing.
2448 All the quick functions need is the list of file names. We discard the
2449 line_header when we're done and don't need to record it here. */
2450 struct quick_file_names
2452 /* The data used to construct the hash key. */
2453 struct stmt_list_hash hash;
2455 /* The number of entries in file_names, real_names. */
2456 unsigned int num_file_names;
2458 /* The file names from the line table, after being run through
2460 const char **file_names;
2462 /* The file names from the line table after being run through
2463 gdb_realpath. These are computed lazily. */
2464 const char **real_names;
2467 /* When using the index (and thus not using psymtabs), each CU has an
2468 object of this type. This is used to hold information needed by
2469 the various "quick" methods. */
2470 struct dwarf2_per_cu_quick_data
2472 /* The file table. This can be NULL if there was no file table
2473 or it's currently not read in.
2474 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2475 struct quick_file_names *file_names;
2477 /* The corresponding symbol table. This is NULL if symbols for this
2478 CU have not yet been read. */
2479 struct symtab *symtab;
2481 /* A temporary mark bit used when iterating over all CUs in
2482 expand_symtabs_matching. */
2483 unsigned int mark : 1;
2485 /* True if we've tried to read the file table and found there isn't one.
2486 There will be no point in trying to read it again next time. */
2487 unsigned int no_file_data : 1;
2490 /* Utility hash function for a stmt_list_hash. */
2493 hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash)
2497 if (stmt_list_hash->dwo_unit != NULL)
2498 v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file;
2499 v += stmt_list_hash->line_offset.sect_off;
2503 /* Utility equality function for a stmt_list_hash. */
2506 eq_stmt_list_entry (const struct stmt_list_hash *lhs,
2507 const struct stmt_list_hash *rhs)
2509 if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL))
2511 if (lhs->dwo_unit != NULL
2512 && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file)
2515 return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
2518 /* Hash function for a quick_file_names. */
2521 hash_file_name_entry (const void *e)
2523 const struct quick_file_names *file_data = e;
2525 return hash_stmt_list_entry (&file_data->hash);
2528 /* Equality function for a quick_file_names. */
2531 eq_file_name_entry (const void *a, const void *b)
2533 const struct quick_file_names *ea = a;
2534 const struct quick_file_names *eb = b;
2536 return eq_stmt_list_entry (&ea->hash, &eb->hash);
2539 /* Delete function for a quick_file_names. */
2542 delete_file_name_entry (void *e)
2544 struct quick_file_names *file_data = e;
2547 for (i = 0; i < file_data->num_file_names; ++i)
2549 xfree ((void*) file_data->file_names[i]);
2550 if (file_data->real_names)
2551 xfree ((void*) file_data->real_names[i]);
2554 /* The space for the struct itself lives on objfile_obstack,
2555 so we don't free it here. */
2558 /* Create a quick_file_names hash table. */
2561 create_quick_file_names_table (unsigned int nr_initial_entries)
2563 return htab_create_alloc (nr_initial_entries,
2564 hash_file_name_entry, eq_file_name_entry,
2565 delete_file_name_entry, xcalloc, xfree);
2568 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2569 have to be created afterwards. You should call age_cached_comp_units after
2570 processing PER_CU->CU. dw2_setup must have been already called. */
2573 load_cu (struct dwarf2_per_cu_data *per_cu)
2575 if (per_cu->is_debug_types)
2576 load_full_type_unit (per_cu);
2578 load_full_comp_unit (per_cu, language_minimal);
2580 gdb_assert (per_cu->cu != NULL);
2582 dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu);
2585 /* Read in the symbols for PER_CU. */
2588 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2590 struct cleanup *back_to;
2592 /* Skip type_unit_groups, reading the type units they contain
2593 is handled elsewhere. */
2594 if (IS_TYPE_UNIT_GROUP (per_cu))
2597 back_to = make_cleanup (dwarf2_release_queue, NULL);
2599 if (dwarf2_per_objfile->using_index
2600 ? per_cu->v.quick->symtab == NULL
2601 : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin))
2603 queue_comp_unit (per_cu, language_minimal);
2606 /* If we just loaded a CU from a DWO, and we're working with an index
2607 that may badly handle TUs, load all the TUs in that DWO as well.
2608 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2609 if (!per_cu->is_debug_types
2610 && per_cu->cu->dwo_unit != NULL
2611 && dwarf2_per_objfile->index_table != NULL
2612 && dwarf2_per_objfile->index_table->version <= 7
2613 /* DWP files aren't supported yet. */
2614 && get_dwp_file () == NULL)
2615 queue_and_load_all_dwo_tus (per_cu);
2620 /* Age the cache, releasing compilation units that have not
2621 been used recently. */
2622 age_cached_comp_units ();
2624 do_cleanups (back_to);
2627 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2628 the objfile from which this CU came. Returns the resulting symbol
2631 static struct symtab *
2632 dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2634 gdb_assert (dwarf2_per_objfile->using_index);
2635 if (!per_cu->v.quick->symtab)
2637 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
2638 increment_reading_symtab ();
2639 dw2_do_instantiate_symtab (per_cu);
2640 process_cu_includes ();
2641 do_cleanups (back_to);
2643 return per_cu->v.quick->symtab;
2646 /* Return the CU given its index.
2648 This is intended for loops like:
2650 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2651 + dwarf2_per_objfile->n_type_units); ++i)
2653 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2659 static struct dwarf2_per_cu_data *
2660 dw2_get_cu (int index)
2662 if (index >= dwarf2_per_objfile->n_comp_units)
2664 index -= dwarf2_per_objfile->n_comp_units;
2665 gdb_assert (index < dwarf2_per_objfile->n_type_units);
2666 return &dwarf2_per_objfile->all_type_units[index]->per_cu;
2669 return dwarf2_per_objfile->all_comp_units[index];
2672 /* Return the primary CU given its index.
2673 The difference between this function and dw2_get_cu is in the handling
2674 of type units (TUs). Here we return the type_unit_group object.
2676 This is intended for loops like:
2678 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2679 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2681 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2687 static struct dwarf2_per_cu_data *
2688 dw2_get_primary_cu (int index)
2690 if (index >= dwarf2_per_objfile->n_comp_units)
2692 index -= dwarf2_per_objfile->n_comp_units;
2693 gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups);
2694 return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu;
2697 return dwarf2_per_objfile->all_comp_units[index];
2700 /* A helper for create_cus_from_index that handles a given list of
2704 create_cus_from_index_list (struct objfile *objfile,
2705 const gdb_byte *cu_list, offset_type n_elements,
2706 struct dwarf2_section_info *section,
2712 for (i = 0; i < n_elements; i += 2)
2714 struct dwarf2_per_cu_data *the_cu;
2715 ULONGEST offset, length;
2717 gdb_static_assert (sizeof (ULONGEST) >= 8);
2718 offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE);
2719 length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE);
2722 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2723 struct dwarf2_per_cu_data);
2724 the_cu->offset.sect_off = offset;
2725 the_cu->length = length;
2726 the_cu->objfile = objfile;
2727 the_cu->section = section;
2728 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2729 struct dwarf2_per_cu_quick_data);
2730 the_cu->is_dwz = is_dwz;
2731 dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu;
2735 /* Read the CU list from the mapped index, and use it to create all
2736 the CU objects for this objfile. */
2739 create_cus_from_index (struct objfile *objfile,
2740 const gdb_byte *cu_list, offset_type cu_list_elements,
2741 const gdb_byte *dwz_list, offset_type dwz_elements)
2743 struct dwz_file *dwz;
2745 dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2;
2746 dwarf2_per_objfile->all_comp_units
2747 = obstack_alloc (&objfile->objfile_obstack,
2748 dwarf2_per_objfile->n_comp_units
2749 * sizeof (struct dwarf2_per_cu_data *));
2751 create_cus_from_index_list (objfile, cu_list, cu_list_elements,
2752 &dwarf2_per_objfile->info, 0, 0);
2754 if (dwz_elements == 0)
2757 dwz = dwarf2_get_dwz_file ();
2758 create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1,
2759 cu_list_elements / 2);
2762 /* Create the signatured type hash table from the index. */
2765 create_signatured_type_table_from_index (struct objfile *objfile,
2766 struct dwarf2_section_info *section,
2767 const gdb_byte *bytes,
2768 offset_type elements)
2771 htab_t sig_types_hash;
2773 dwarf2_per_objfile->n_type_units = elements / 3;
2774 dwarf2_per_objfile->all_type_units
2775 = xmalloc (dwarf2_per_objfile->n_type_units
2776 * sizeof (struct signatured_type *));
2778 sig_types_hash = allocate_signatured_type_table (objfile);
2780 for (i = 0; i < elements; i += 3)
2782 struct signatured_type *sig_type;
2783 ULONGEST offset, type_offset_in_tu, signature;
2786 gdb_static_assert (sizeof (ULONGEST) >= 8);
2787 offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
2788 type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8,
2790 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
2793 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2794 struct signatured_type);
2795 sig_type->signature = signature;
2796 sig_type->type_offset_in_tu.cu_off = type_offset_in_tu;
2797 sig_type->per_cu.is_debug_types = 1;
2798 sig_type->per_cu.section = section;
2799 sig_type->per_cu.offset.sect_off = offset;
2800 sig_type->per_cu.objfile = objfile;
2801 sig_type->per_cu.v.quick
2802 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2803 struct dwarf2_per_cu_quick_data);
2805 slot = htab_find_slot (sig_types_hash, sig_type, INSERT);
2808 dwarf2_per_objfile->all_type_units[i / 3] = sig_type;
2811 dwarf2_per_objfile->signatured_types = sig_types_hash;
2814 /* Read the address map data from the mapped index, and use it to
2815 populate the objfile's psymtabs_addrmap. */
2818 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
2820 const gdb_byte *iter, *end;
2821 struct obstack temp_obstack;
2822 struct addrmap *mutable_map;
2823 struct cleanup *cleanup;
2826 obstack_init (&temp_obstack);
2827 cleanup = make_cleanup_obstack_free (&temp_obstack);
2828 mutable_map = addrmap_create_mutable (&temp_obstack);
2830 iter = index->address_table;
2831 end = iter + index->address_table_size;
2833 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2837 ULONGEST hi, lo, cu_index;
2838 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2840 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2842 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
2847 complaint (&symfile_complaints,
2848 _(".gdb_index address table has invalid range (%s - %s)"),
2849 hex_string (lo), hex_string (hi));
2853 if (cu_index >= dwarf2_per_objfile->n_comp_units)
2855 complaint (&symfile_complaints,
2856 _(".gdb_index address table has invalid CU number %u"),
2857 (unsigned) cu_index);
2861 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
2862 dw2_get_cu (cu_index));
2865 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
2866 &objfile->objfile_obstack);
2867 do_cleanups (cleanup);
2870 /* The hash function for strings in the mapped index. This is the same as
2871 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2872 implementation. This is necessary because the hash function is tied to the
2873 format of the mapped index file. The hash values do not have to match with
2876 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2879 mapped_index_string_hash (int index_version, const void *p)
2881 const unsigned char *str = (const unsigned char *) p;
2885 while ((c = *str++) != 0)
2887 if (index_version >= 5)
2889 r = r * 67 + c - 113;
2895 /* Find a slot in the mapped index INDEX for the object named NAME.
2896 If NAME is found, set *VEC_OUT to point to the CU vector in the
2897 constant pool and return 1. If NAME cannot be found, return 0. */
2900 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
2901 offset_type **vec_out)
2903 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2905 offset_type slot, step;
2906 int (*cmp) (const char *, const char *);
2908 if (current_language->la_language == language_cplus
2909 || current_language->la_language == language_java
2910 || current_language->la_language == language_fortran)
2912 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2914 const char *paren = strchr (name, '(');
2920 dup = xmalloc (paren - name + 1);
2921 memcpy (dup, name, paren - name);
2922 dup[paren - name] = 0;
2924 make_cleanup (xfree, dup);
2929 /* Index version 4 did not support case insensitive searches. But the
2930 indices for case insensitive languages are built in lowercase, therefore
2931 simulate our NAME being searched is also lowercased. */
2932 hash = mapped_index_string_hash ((index->version == 4
2933 && case_sensitivity == case_sensitive_off
2934 ? 5 : index->version),
2937 slot = hash & (index->symbol_table_slots - 1);
2938 step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1;
2939 cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp);
2943 /* Convert a slot number to an offset into the table. */
2944 offset_type i = 2 * slot;
2946 if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0)
2948 do_cleanups (back_to);
2952 str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]);
2953 if (!cmp (name, str))
2955 *vec_out = (offset_type *) (index->constant_pool
2956 + MAYBE_SWAP (index->symbol_table[i + 1]));
2957 do_cleanups (back_to);
2961 slot = (slot + step) & (index->symbol_table_slots - 1);
2965 /* A helper function that reads the .gdb_index from SECTION and fills
2966 in MAP. FILENAME is the name of the file containing the section;
2967 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2968 ok to use deprecated sections.
2970 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2971 out parameters that are filled in with information about the CU and
2972 TU lists in the section.
2974 Returns 1 if all went well, 0 otherwise. */
2977 read_index_from_section (struct objfile *objfile,
2978 const char *filename,
2980 struct dwarf2_section_info *section,
2981 struct mapped_index *map,
2982 const gdb_byte **cu_list,
2983 offset_type *cu_list_elements,
2984 const gdb_byte **types_list,
2985 offset_type *types_list_elements)
2987 const gdb_byte *addr;
2988 offset_type version;
2989 offset_type *metadata;
2992 if (dwarf2_section_empty_p (section))
2995 /* Older elfutils strip versions could keep the section in the main
2996 executable while splitting it for the separate debug info file. */
2997 if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0)
3000 dwarf2_read_section (objfile, section);
3002 addr = section->buffer;
3003 /* Version check. */
3004 version = MAYBE_SWAP (*(offset_type *) addr);
3005 /* Versions earlier than 3 emitted every copy of a psymbol. This
3006 causes the index to behave very poorly for certain requests. Version 3
3007 contained incomplete addrmap. So, it seems better to just ignore such
3011 static int warning_printed = 0;
3012 if (!warning_printed)
3014 warning (_("Skipping obsolete .gdb_index section in %s."),
3016 warning_printed = 1;
3020 /* Index version 4 uses a different hash function than index version
3023 Versions earlier than 6 did not emit psymbols for inlined
3024 functions. Using these files will cause GDB not to be able to
3025 set breakpoints on inlined functions by name, so we ignore these
3026 indices unless the user has done
3027 "set use-deprecated-index-sections on". */
3028 if (version < 6 && !deprecated_ok)
3030 static int warning_printed = 0;
3031 if (!warning_printed)
3034 Skipping deprecated .gdb_index section in %s.\n\
3035 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3036 to use the section anyway."),
3038 warning_printed = 1;
3042 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3043 of the TU (for symbols coming from TUs),
3044 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3045 Plus gold-generated indices can have duplicate entries for global symbols,
3046 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3047 These are just performance bugs, and we can't distinguish gdb-generated
3048 indices from gold-generated ones, so issue no warning here. */
3050 /* Indexes with higher version than the one supported by GDB may be no
3051 longer backward compatible. */
3055 map->version = version;
3056 map->total_size = section->size;
3058 metadata = (offset_type *) (addr + sizeof (offset_type));
3061 *cu_list = addr + MAYBE_SWAP (metadata[i]);
3062 *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
3066 *types_list = addr + MAYBE_SWAP (metadata[i]);
3067 *types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
3068 - MAYBE_SWAP (metadata[i]))
3072 map->address_table = addr + MAYBE_SWAP (metadata[i]);
3073 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
3074 - MAYBE_SWAP (metadata[i]));
3077 map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
3078 map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1])
3079 - MAYBE_SWAP (metadata[i]))
3080 / (2 * sizeof (offset_type)));
3083 map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i]));
3089 /* Read the index file. If everything went ok, initialize the "quick"
3090 elements of all the CUs and return 1. Otherwise, return 0. */
3093 dwarf2_read_index (struct objfile *objfile)
3095 struct mapped_index local_map, *map;
3096 const gdb_byte *cu_list, *types_list, *dwz_list = NULL;
3097 offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0;
3098 struct dwz_file *dwz;
3100 if (!read_index_from_section (objfile, objfile_name (objfile),
3101 use_deprecated_index_sections,
3102 &dwarf2_per_objfile->gdb_index, &local_map,
3103 &cu_list, &cu_list_elements,
3104 &types_list, &types_list_elements))
3107 /* Don't use the index if it's empty. */
3108 if (local_map.symbol_table_slots == 0)
3111 /* If there is a .dwz file, read it so we can get its CU list as
3113 dwz = dwarf2_get_dwz_file ();
3116 struct mapped_index dwz_map;
3117 const gdb_byte *dwz_types_ignore;
3118 offset_type dwz_types_elements_ignore;
3120 if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd),
3122 &dwz->gdb_index, &dwz_map,
3123 &dwz_list, &dwz_list_elements,
3125 &dwz_types_elements_ignore))
3127 warning (_("could not read '.gdb_index' section from %s; skipping"),
3128 bfd_get_filename (dwz->dwz_bfd));
3133 create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list,
3136 if (types_list_elements)
3138 struct dwarf2_section_info *section;
3140 /* We can only handle a single .debug_types when we have an
3142 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1)
3145 section = VEC_index (dwarf2_section_info_def,
3146 dwarf2_per_objfile->types, 0);
3148 create_signatured_type_table_from_index (objfile, section, types_list,
3149 types_list_elements);
3152 create_addrmap_from_index (objfile, &local_map);
3154 map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index));
3157 dwarf2_per_objfile->index_table = map;
3158 dwarf2_per_objfile->using_index = 1;
3159 dwarf2_per_objfile->quick_file_names_table =
3160 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
3165 /* A helper for the "quick" functions which sets the global
3166 dwarf2_per_objfile according to OBJFILE. */
3169 dw2_setup (struct objfile *objfile)
3171 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
3172 gdb_assert (dwarf2_per_objfile);
3175 /* die_reader_func for dw2_get_file_names. */
3178 dw2_get_file_names_reader (const struct die_reader_specs *reader,
3179 const gdb_byte *info_ptr,
3180 struct die_info *comp_unit_die,
3184 struct dwarf2_cu *cu = reader->cu;
3185 struct dwarf2_per_cu_data *this_cu = cu->per_cu;
3186 struct objfile *objfile = dwarf2_per_objfile->objfile;
3187 struct dwarf2_per_cu_data *lh_cu;
3188 struct line_header *lh;
3189 struct attribute *attr;
3191 const char *name, *comp_dir;
3193 struct quick_file_names *qfn;
3194 unsigned int line_offset;
3196 gdb_assert (! this_cu->is_debug_types);
3198 /* Our callers never want to match partial units -- instead they
3199 will match the enclosing full CU. */
3200 if (comp_unit_die->tag == DW_TAG_partial_unit)
3202 this_cu->v.quick->no_file_data = 1;
3211 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
3214 struct quick_file_names find_entry;
3216 line_offset = DW_UNSND (attr);
3218 /* We may have already read in this line header (TU line header sharing).
3219 If we have we're done. */
3220 find_entry.hash.dwo_unit = cu->dwo_unit;
3221 find_entry.hash.line_offset.sect_off = line_offset;
3222 slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
3223 &find_entry, INSERT);
3226 lh_cu->v.quick->file_names = *slot;
3230 lh = dwarf_decode_line_header (line_offset, cu);
3234 lh_cu->v.quick->no_file_data = 1;
3238 qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
3239 qfn->hash.dwo_unit = cu->dwo_unit;
3240 qfn->hash.line_offset.sect_off = line_offset;
3241 gdb_assert (slot != NULL);
3244 find_file_and_directory (comp_unit_die, cu, &name, &comp_dir);
3246 qfn->num_file_names = lh->num_file_names;
3247 qfn->file_names = obstack_alloc (&objfile->objfile_obstack,
3248 lh->num_file_names * sizeof (char *));
3249 for (i = 0; i < lh->num_file_names; ++i)
3250 qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir);
3251 qfn->real_names = NULL;
3253 free_line_header (lh);
3255 lh_cu->v.quick->file_names = qfn;
3258 /* A helper for the "quick" functions which attempts to read the line
3259 table for THIS_CU. */
3261 static struct quick_file_names *
3262 dw2_get_file_names (struct dwarf2_per_cu_data *this_cu)
3264 /* This should never be called for TUs. */
3265 gdb_assert (! this_cu->is_debug_types);
3266 /* Nor type unit groups. */
3267 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu));
3269 if (this_cu->v.quick->file_names != NULL)
3270 return this_cu->v.quick->file_names;
3271 /* If we know there is no line data, no point in looking again. */
3272 if (this_cu->v.quick->no_file_data)
3275 init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
3277 if (this_cu->v.quick->no_file_data)
3279 return this_cu->v.quick->file_names;
3282 /* A helper for the "quick" functions which computes and caches the
3283 real path for a given file name from the line table. */
3286 dw2_get_real_path (struct objfile *objfile,
3287 struct quick_file_names *qfn, int index)
3289 if (qfn->real_names == NULL)
3290 qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
3291 qfn->num_file_names, char *);
3293 if (qfn->real_names[index] == NULL)
3294 qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
3296 return qfn->real_names[index];
3299 static struct symtab *
3300 dw2_find_last_source_symtab (struct objfile *objfile)
3304 dw2_setup (objfile);
3305 index = dwarf2_per_objfile->n_comp_units - 1;
3306 return dw2_instantiate_symtab (dw2_get_cu (index));
3309 /* Traversal function for dw2_forget_cached_source_info. */
3312 dw2_free_cached_file_names (void **slot, void *info)
3314 struct quick_file_names *file_data = (struct quick_file_names *) *slot;
3316 if (file_data->real_names)
3320 for (i = 0; i < file_data->num_file_names; ++i)
3322 xfree ((void*) file_data->real_names[i]);
3323 file_data->real_names[i] = NULL;
3331 dw2_forget_cached_source_info (struct objfile *objfile)
3333 dw2_setup (objfile);
3335 htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table,
3336 dw2_free_cached_file_names, NULL);
3339 /* Helper function for dw2_map_symtabs_matching_filename that expands
3340 the symtabs and calls the iterator. */
3343 dw2_map_expand_apply (struct objfile *objfile,
3344 struct dwarf2_per_cu_data *per_cu,
3345 const char *name, const char *real_path,
3346 int (*callback) (struct symtab *, void *),
3349 struct symtab *last_made = objfile->symtabs;
3351 /* Don't visit already-expanded CUs. */
3352 if (per_cu->v.quick->symtab)
3355 /* This may expand more than one symtab, and we want to iterate over
3357 dw2_instantiate_symtab (per_cu);
3359 return iterate_over_some_symtabs (name, real_path, callback, data,
3360 objfile->symtabs, last_made);
3363 /* Implementation of the map_symtabs_matching_filename method. */
3366 dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name,
3367 const char *real_path,
3368 int (*callback) (struct symtab *, void *),
3372 const char *name_basename = lbasename (name);
3374 dw2_setup (objfile);
3376 /* The rule is CUs specify all the files, including those used by
3377 any TU, so there's no need to scan TUs here. */
3379 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3382 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3383 struct quick_file_names *file_data;
3385 /* We only need to look at symtabs not already expanded. */
3386 if (per_cu->v.quick->symtab)
3389 file_data = dw2_get_file_names (per_cu);
3390 if (file_data == NULL)
3393 for (j = 0; j < file_data->num_file_names; ++j)
3395 const char *this_name = file_data->file_names[j];
3396 const char *this_real_name;
3398 if (compare_filenames_for_search (this_name, name))
3400 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3406 /* Before we invoke realpath, which can get expensive when many
3407 files are involved, do a quick comparison of the basenames. */
3408 if (! basenames_may_differ
3409 && FILENAME_CMP (lbasename (this_name), name_basename) != 0)
3412 this_real_name = dw2_get_real_path (objfile, file_data, j);
3413 if (compare_filenames_for_search (this_real_name, name))
3415 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3421 if (real_path != NULL)
3423 gdb_assert (IS_ABSOLUTE_PATH (real_path));
3424 gdb_assert (IS_ABSOLUTE_PATH (name));
3425 if (this_real_name != NULL
3426 && FILENAME_CMP (real_path, this_real_name) == 0)
3428 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3440 /* Struct used to manage iterating over all CUs looking for a symbol. */
3442 struct dw2_symtab_iterator
3444 /* The internalized form of .gdb_index. */
3445 struct mapped_index *index;
3446 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3447 int want_specific_block;
3448 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3449 Unused if !WANT_SPECIFIC_BLOCK. */
3451 /* The kind of symbol we're looking for. */
3453 /* The list of CUs from the index entry of the symbol,
3454 or NULL if not found. */
3456 /* The next element in VEC to look at. */
3458 /* The number of elements in VEC, or zero if there is no match. */
3460 /* Have we seen a global version of the symbol?
3461 If so we can ignore all further global instances.
3462 This is to work around gold/15646, inefficient gold-generated
3467 /* Initialize the index symtab iterator ITER.
3468 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3469 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3472 dw2_symtab_iter_init (struct dw2_symtab_iterator *iter,
3473 struct mapped_index *index,
3474 int want_specific_block,
3479 iter->index = index;
3480 iter->want_specific_block = want_specific_block;
3481 iter->block_index = block_index;
3482 iter->domain = domain;
3484 iter->global_seen = 0;
3486 if (find_slot_in_mapped_hash (index, name, &iter->vec))
3487 iter->length = MAYBE_SWAP (*iter->vec);
3495 /* Return the next matching CU or NULL if there are no more. */
3497 static struct dwarf2_per_cu_data *
3498 dw2_symtab_iter_next (struct dw2_symtab_iterator *iter)
3500 for ( ; iter->next < iter->length; ++iter->next)
3502 offset_type cu_index_and_attrs =
3503 MAYBE_SWAP (iter->vec[iter->next + 1]);
3504 offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3505 struct dwarf2_per_cu_data *per_cu;
3506 int want_static = iter->block_index != GLOBAL_BLOCK;
3507 /* This value is only valid for index versions >= 7. */
3508 int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
3509 gdb_index_symbol_kind symbol_kind =
3510 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3511 /* Only check the symbol attributes if they're present.
3512 Indices prior to version 7 don't record them,
3513 and indices >= 7 may elide them for certain symbols
3514 (gold does this). */
3516 (iter->index->version >= 7
3517 && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
3519 /* Don't crash on bad data. */
3520 if (cu_index >= (dwarf2_per_objfile->n_comp_units
3521 + dwarf2_per_objfile->n_type_units))
3523 complaint (&symfile_complaints,
3524 _(".gdb_index entry has bad CU index"
3526 objfile_name (dwarf2_per_objfile->objfile));
3530 per_cu = dw2_get_cu (cu_index);
3532 /* Skip if already read in. */
3533 if (per_cu->v.quick->symtab)
3536 /* Check static vs global. */
3539 if (iter->want_specific_block
3540 && want_static != is_static)
3542 /* Work around gold/15646. */
3543 if (!is_static && iter->global_seen)
3546 iter->global_seen = 1;
3549 /* Only check the symbol's kind if it has one. */
3552 switch (iter->domain)
3555 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE
3556 && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION
3557 /* Some types are also in VAR_DOMAIN. */
3558 && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3562 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3566 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER)
3581 static struct symtab *
3582 dw2_lookup_symbol (struct objfile *objfile, int block_index,
3583 const char *name, domain_enum domain)
3585 struct symtab *stab_best = NULL;
3586 struct mapped_index *index;
3588 dw2_setup (objfile);
3590 index = dwarf2_per_objfile->index_table;
3592 /* index is NULL if OBJF_READNOW. */
3595 struct dw2_symtab_iterator iter;
3596 struct dwarf2_per_cu_data *per_cu;
3598 dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name);
3600 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3602 struct symbol *sym = NULL;
3603 struct symtab *stab = dw2_instantiate_symtab (per_cu);
3605 /* Some caution must be observed with overloaded functions
3606 and methods, since the index will not contain any overload
3607 information (but NAME might contain it). */
3610 struct blockvector *bv = BLOCKVECTOR (stab);
3611 struct block *block = BLOCKVECTOR_BLOCK (bv, block_index);
3613 sym = lookup_block_symbol (block, name, domain);
3616 if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0)
3618 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
3624 /* Keep looking through other CUs. */
3632 dw2_print_stats (struct objfile *objfile)
3634 int i, total, count;
3636 dw2_setup (objfile);
3637 total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units;
3639 for (i = 0; i < total; ++i)
3641 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3643 if (!per_cu->v.quick->symtab)
3646 printf_filtered (_(" Number of read CUs: %d\n"), total - count);
3647 printf_filtered (_(" Number of unread CUs: %d\n"), count);
3650 /* This dumps minimal information about the index.
3651 It is called via "mt print objfiles".
3652 One use is to verify .gdb_index has been loaded by the
3653 gdb.dwarf2/gdb-index.exp testcase. */
3656 dw2_dump (struct objfile *objfile)
3658 dw2_setup (objfile);
3659 gdb_assert (dwarf2_per_objfile->using_index);
3660 printf_filtered (".gdb_index:");
3661 if (dwarf2_per_objfile->index_table != NULL)
3663 printf_filtered (" version %d\n",
3664 dwarf2_per_objfile->index_table->version);
3667 printf_filtered (" faked for \"readnow\"\n");
3668 printf_filtered ("\n");
3672 dw2_relocate (struct objfile *objfile,
3673 const struct section_offsets *new_offsets,
3674 const struct section_offsets *delta)
3676 /* There's nothing to relocate here. */
3680 dw2_expand_symtabs_for_function (struct objfile *objfile,
3681 const char *func_name)
3683 struct mapped_index *index;
3685 dw2_setup (objfile);
3687 index = dwarf2_per_objfile->index_table;
3689 /* index is NULL if OBJF_READNOW. */
3692 struct dw2_symtab_iterator iter;
3693 struct dwarf2_per_cu_data *per_cu;
3695 /* Note: It doesn't matter what we pass for block_index here. */
3696 dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN,
3699 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3700 dw2_instantiate_symtab (per_cu);
3705 dw2_expand_all_symtabs (struct objfile *objfile)
3709 dw2_setup (objfile);
3711 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3712 + dwarf2_per_objfile->n_type_units); ++i)
3714 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3716 dw2_instantiate_symtab (per_cu);
3721 dw2_expand_symtabs_with_fullname (struct objfile *objfile,
3722 const char *fullname)
3726 dw2_setup (objfile);
3728 /* We don't need to consider type units here.
3729 This is only called for examining code, e.g. expand_line_sal.
3730 There can be an order of magnitude (or more) more type units
3731 than comp units, and we avoid them if we can. */
3733 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3736 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3737 struct quick_file_names *file_data;
3739 /* We only need to look at symtabs not already expanded. */
3740 if (per_cu->v.quick->symtab)
3743 file_data = dw2_get_file_names (per_cu);
3744 if (file_data == NULL)
3747 for (j = 0; j < file_data->num_file_names; ++j)
3749 const char *this_fullname = file_data->file_names[j];
3751 if (filename_cmp (this_fullname, fullname) == 0)
3753 dw2_instantiate_symtab (per_cu);
3761 dw2_map_matching_symbols (struct objfile *objfile,
3762 const char * name, domain_enum namespace,
3764 int (*callback) (struct block *,
3765 struct symbol *, void *),
3766 void *data, symbol_compare_ftype *match,
3767 symbol_compare_ftype *ordered_compare)
3769 /* Currently unimplemented; used for Ada. The function can be called if the
3770 current language is Ada for a non-Ada objfile using GNU index. As Ada
3771 does not look for non-Ada symbols this function should just return. */
3775 dw2_expand_symtabs_matching
3776 (struct objfile *objfile,
3777 expand_symtabs_file_matcher_ftype *file_matcher,
3778 expand_symtabs_symbol_matcher_ftype *symbol_matcher,
3779 enum search_domain kind,
3784 struct mapped_index *index;
3786 dw2_setup (objfile);
3788 /* index_table is NULL if OBJF_READNOW. */
3789 if (!dwarf2_per_objfile->index_table)
3791 index = dwarf2_per_objfile->index_table;
3793 if (file_matcher != NULL)
3795 struct cleanup *cleanup;
3796 htab_t visited_found, visited_not_found;
3798 visited_found = htab_create_alloc (10,
3799 htab_hash_pointer, htab_eq_pointer,
3800 NULL, xcalloc, xfree);
3801 cleanup = make_cleanup_htab_delete (visited_found);
3802 visited_not_found = htab_create_alloc (10,
3803 htab_hash_pointer, htab_eq_pointer,
3804 NULL, xcalloc, xfree);
3805 make_cleanup_htab_delete (visited_not_found);
3807 /* The rule is CUs specify all the files, including those used by
3808 any TU, so there's no need to scan TUs here. */
3810 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3813 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3814 struct quick_file_names *file_data;
3817 per_cu->v.quick->mark = 0;
3819 /* We only need to look at symtabs not already expanded. */
3820 if (per_cu->v.quick->symtab)
3823 file_data = dw2_get_file_names (per_cu);
3824 if (file_data == NULL)
3827 if (htab_find (visited_not_found, file_data) != NULL)
3829 else if (htab_find (visited_found, file_data) != NULL)
3831 per_cu->v.quick->mark = 1;
3835 for (j = 0; j < file_data->num_file_names; ++j)
3837 const char *this_real_name;
3839 if (file_matcher (file_data->file_names[j], data, 0))
3841 per_cu->v.quick->mark = 1;
3845 /* Before we invoke realpath, which can get expensive when many
3846 files are involved, do a quick comparison of the basenames. */
3847 if (!basenames_may_differ
3848 && !file_matcher (lbasename (file_data->file_names[j]),
3852 this_real_name = dw2_get_real_path (objfile, file_data, j);
3853 if (file_matcher (this_real_name, data, 0))
3855 per_cu->v.quick->mark = 1;
3860 slot = htab_find_slot (per_cu->v.quick->mark
3862 : visited_not_found,
3867 do_cleanups (cleanup);
3870 for (iter = 0; iter < index->symbol_table_slots; ++iter)
3872 offset_type idx = 2 * iter;
3874 offset_type *vec, vec_len, vec_idx;
3875 int global_seen = 0;
3877 if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
3880 name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
3882 if (! (*symbol_matcher) (name, data))
3885 /* The name was matched, now expand corresponding CUs that were
3887 vec = (offset_type *) (index->constant_pool
3888 + MAYBE_SWAP (index->symbol_table[idx + 1]));
3889 vec_len = MAYBE_SWAP (vec[0]);
3890 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
3892 struct dwarf2_per_cu_data *per_cu;
3893 offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]);
3894 /* This value is only valid for index versions >= 7. */
3895 int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
3896 gdb_index_symbol_kind symbol_kind =
3897 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3898 int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3899 /* Only check the symbol attributes if they're present.
3900 Indices prior to version 7 don't record them,
3901 and indices >= 7 may elide them for certain symbols
3902 (gold does this). */
3904 (index->version >= 7
3905 && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
3907 /* Work around gold/15646. */
3910 if (!is_static && global_seen)
3916 /* Only check the symbol's kind if it has one. */
3921 case VARIABLES_DOMAIN:
3922 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE)
3925 case FUNCTIONS_DOMAIN:
3926 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION)
3930 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3938 /* Don't crash on bad data. */
3939 if (cu_index >= (dwarf2_per_objfile->n_comp_units
3940 + dwarf2_per_objfile->n_type_units))
3942 complaint (&symfile_complaints,
3943 _(".gdb_index entry has bad CU index"
3944 " [in module %s]"), objfile_name (objfile));
3948 per_cu = dw2_get_cu (cu_index);
3949 if (file_matcher == NULL || per_cu->v.quick->mark)
3950 dw2_instantiate_symtab (per_cu);
3955 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3958 static struct symtab *
3959 recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc)
3963 if (BLOCKVECTOR (symtab) != NULL
3964 && blockvector_contains_pc (BLOCKVECTOR (symtab), pc))
3967 if (symtab->includes == NULL)
3970 for (i = 0; symtab->includes[i]; ++i)
3972 struct symtab *s = symtab->includes[i];
3974 s = recursively_find_pc_sect_symtab (s, pc);
3982 static struct symtab *
3983 dw2_find_pc_sect_symtab (struct objfile *objfile,
3984 struct minimal_symbol *msymbol,
3986 struct obj_section *section,
3989 struct dwarf2_per_cu_data *data;
3990 struct symtab *result;
3992 dw2_setup (objfile);
3994 if (!objfile->psymtabs_addrmap)
3997 data = addrmap_find (objfile->psymtabs_addrmap, pc);
4001 if (warn_if_readin && data->v.quick->symtab)
4002 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4003 paddress (get_objfile_arch (objfile), pc));
4005 result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc);
4006 gdb_assert (result != NULL);
4011 dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun,
4012 void *data, int need_fullname)
4015 struct cleanup *cleanup;
4016 htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer,
4017 NULL, xcalloc, xfree);
4019 cleanup = make_cleanup_htab_delete (visited);
4020 dw2_setup (objfile);
4022 /* The rule is CUs specify all the files, including those used by
4023 any TU, so there's no need to scan TUs here.
4024 We can ignore file names coming from already-expanded CUs. */
4026 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
4028 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
4030 if (per_cu->v.quick->symtab)
4032 void **slot = htab_find_slot (visited, per_cu->v.quick->file_names,
4035 *slot = per_cu->v.quick->file_names;
4039 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
4042 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
4043 struct quick_file_names *file_data;
4046 /* We only need to look at symtabs not already expanded. */
4047 if (per_cu->v.quick->symtab)
4050 file_data = dw2_get_file_names (per_cu);
4051 if (file_data == NULL)
4054 slot = htab_find_slot (visited, file_data, INSERT);
4057 /* Already visited. */
4062 for (j = 0; j < file_data->num_file_names; ++j)
4064 const char *this_real_name;
4067 this_real_name = dw2_get_real_path (objfile, file_data, j);
4069 this_real_name = NULL;
4070 (*fun) (file_data->file_names[j], this_real_name, data);
4074 do_cleanups (cleanup);
4078 dw2_has_symbols (struct objfile *objfile)
4083 const struct quick_symbol_functions dwarf2_gdb_index_functions =
4086 dw2_find_last_source_symtab,
4087 dw2_forget_cached_source_info,
4088 dw2_map_symtabs_matching_filename,
4093 dw2_expand_symtabs_for_function,
4094 dw2_expand_all_symtabs,
4095 dw2_expand_symtabs_with_fullname,
4096 dw2_map_matching_symbols,
4097 dw2_expand_symtabs_matching,
4098 dw2_find_pc_sect_symtab,
4099 dw2_map_symbol_filenames
4102 /* Initialize for reading DWARF for this objfile. Return 0 if this
4103 file will use psymtabs, or 1 if using the GNU index. */
4106 dwarf2_initialize_objfile (struct objfile *objfile)
4108 /* If we're about to read full symbols, don't bother with the
4109 indices. In this case we also don't care if some other debug
4110 format is making psymtabs, because they are all about to be
4112 if ((objfile->flags & OBJF_READNOW))
4116 dwarf2_per_objfile->using_index = 1;
4117 create_all_comp_units (objfile);
4118 create_all_type_units (objfile);
4119 dwarf2_per_objfile->quick_file_names_table =
4120 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
4122 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
4123 + dwarf2_per_objfile->n_type_units); ++i)
4125 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
4127 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4128 struct dwarf2_per_cu_quick_data);
4131 /* Return 1 so that gdb sees the "quick" functions. However,
4132 these functions will be no-ops because we will have expanded
4137 if (dwarf2_read_index (objfile))
4145 /* Build a partial symbol table. */
4148 dwarf2_build_psymtabs (struct objfile *objfile)
4150 volatile struct gdb_exception except;
4152 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
4154 init_psymbol_list (objfile, 1024);
4157 TRY_CATCH (except, RETURN_MASK_ERROR)
4159 /* This isn't really ideal: all the data we allocate on the
4160 objfile's obstack is still uselessly kept around. However,
4161 freeing it seems unsafe. */
4162 struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile);
4164 dwarf2_build_psymtabs_hard (objfile);
4165 discard_cleanups (cleanups);
4167 if (except.reason < 0)
4168 exception_print (gdb_stderr, except);
4171 /* Return the total length of the CU described by HEADER. */
4174 get_cu_length (const struct comp_unit_head *header)
4176 return header->initial_length_size + header->length;
4179 /* Return TRUE if OFFSET is within CU_HEADER. */
4182 offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset)
4184 sect_offset bottom = { cu_header->offset.sect_off };
4185 sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) };
4187 return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off);
4190 /* Find the base address of the compilation unit for range lists and
4191 location lists. It will normally be specified by DW_AT_low_pc.
4192 In DWARF-3 draft 4, the base address could be overridden by
4193 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4194 compilation units with discontinuous ranges. */
4197 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
4199 struct attribute *attr;
4202 cu->base_address = 0;
4204 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
4207 cu->base_address = DW_ADDR (attr);
4212 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4215 cu->base_address = DW_ADDR (attr);
4221 /* Read in the comp unit header information from the debug_info at info_ptr.
4222 NOTE: This leaves members offset, first_die_offset to be filled in
4225 static const gdb_byte *
4226 read_comp_unit_head (struct comp_unit_head *cu_header,
4227 const gdb_byte *info_ptr, bfd *abfd)
4230 unsigned int bytes_read;
4232 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
4233 cu_header->initial_length_size = bytes_read;
4234 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
4235 info_ptr += bytes_read;
4236 cu_header->version = read_2_bytes (abfd, info_ptr);
4238 cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header,
4240 info_ptr += bytes_read;
4241 cu_header->addr_size = read_1_byte (abfd, info_ptr);
4243 signed_addr = bfd_get_sign_extend_vma (abfd);
4244 if (signed_addr < 0)
4245 internal_error (__FILE__, __LINE__,
4246 _("read_comp_unit_head: dwarf from non elf file"));
4247 cu_header->signed_addr_p = signed_addr;
4252 /* Helper function that returns the proper abbrev section for
4255 static struct dwarf2_section_info *
4256 get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu)
4258 struct dwarf2_section_info *abbrev;
4260 if (this_cu->is_dwz)
4261 abbrev = &dwarf2_get_dwz_file ()->abbrev;
4263 abbrev = &dwarf2_per_objfile->abbrev;
4268 /* Subroutine of read_and_check_comp_unit_head and
4269 read_and_check_type_unit_head to simplify them.
4270 Perform various error checking on the header. */
4273 error_check_comp_unit_head (struct comp_unit_head *header,
4274 struct dwarf2_section_info *section,
4275 struct dwarf2_section_info *abbrev_section)
4277 bfd *abfd = get_section_bfd_owner (section);
4278 const char *filename = get_section_file_name (section);
4280 if (header->version != 2 && header->version != 3 && header->version != 4)
4281 error (_("Dwarf Error: wrong version in compilation unit header "
4282 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
4285 if (header->abbrev_offset.sect_off
4286 >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section))
4287 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4288 "(offset 0x%lx + 6) [in module %s]"),
4289 (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off,
4292 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4293 avoid potential 32-bit overflow. */
4294 if (((unsigned long) header->offset.sect_off + get_cu_length (header))
4296 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4297 "(offset 0x%lx + 0) [in module %s]"),
4298 (long) header->length, (long) header->offset.sect_off,
4302 /* Read in a CU/TU header and perform some basic error checking.
4303 The contents of the header are stored in HEADER.
4304 The result is a pointer to the start of the first DIE. */
4306 static const gdb_byte *
4307 read_and_check_comp_unit_head (struct comp_unit_head *header,
4308 struct dwarf2_section_info *section,
4309 struct dwarf2_section_info *abbrev_section,
4310 const gdb_byte *info_ptr,
4311 int is_debug_types_section)
4313 const gdb_byte *beg_of_comp_unit = info_ptr;
4314 bfd *abfd = get_section_bfd_owner (section);
4316 header->offset.sect_off = beg_of_comp_unit - section->buffer;
4318 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
4320 /* If we're reading a type unit, skip over the signature and
4321 type_offset fields. */
4322 if (is_debug_types_section)
4323 info_ptr += 8 /*signature*/ + header->offset_size;
4325 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4327 error_check_comp_unit_head (header, section, abbrev_section);
4332 /* Read in the types comp unit header information from .debug_types entry at
4333 types_ptr. The result is a pointer to one past the end of the header. */
4335 static const gdb_byte *
4336 read_and_check_type_unit_head (struct comp_unit_head *header,
4337 struct dwarf2_section_info *section,
4338 struct dwarf2_section_info *abbrev_section,
4339 const gdb_byte *info_ptr,
4340 ULONGEST *signature,
4341 cu_offset *type_offset_in_tu)
4343 const gdb_byte *beg_of_comp_unit = info_ptr;
4344 bfd *abfd = get_section_bfd_owner (section);
4346 header->offset.sect_off = beg_of_comp_unit - section->buffer;
4348 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
4350 /* If we're reading a type unit, skip over the signature and
4351 type_offset fields. */
4352 if (signature != NULL)
4353 *signature = read_8_bytes (abfd, info_ptr);
4355 if (type_offset_in_tu != NULL)
4356 type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr,
4357 header->offset_size);
4358 info_ptr += header->offset_size;
4360 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4362 error_check_comp_unit_head (header, section, abbrev_section);
4367 /* Fetch the abbreviation table offset from a comp or type unit header. */
4370 read_abbrev_offset (struct dwarf2_section_info *section,
4373 bfd *abfd = get_section_bfd_owner (section);
4374 const gdb_byte *info_ptr;
4375 unsigned int length, initial_length_size, offset_size;
4376 sect_offset abbrev_offset;
4378 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
4379 info_ptr = section->buffer + offset.sect_off;
4380 length = read_initial_length (abfd, info_ptr, &initial_length_size);
4381 offset_size = initial_length_size == 4 ? 4 : 8;
4382 info_ptr += initial_length_size + 2 /*version*/;
4383 abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size);
4384 return abbrev_offset;
4387 /* Allocate a new partial symtab for file named NAME and mark this new
4388 partial symtab as being an include of PST. */
4391 dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst,
4392 struct objfile *objfile)
4394 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
4396 if (!IS_ABSOLUTE_PATH (subpst->filename))
4398 /* It shares objfile->objfile_obstack. */
4399 subpst->dirname = pst->dirname;
4402 subpst->section_offsets = pst->section_offsets;
4403 subpst->textlow = 0;
4404 subpst->texthigh = 0;
4406 subpst->dependencies = (struct partial_symtab **)
4407 obstack_alloc (&objfile->objfile_obstack,
4408 sizeof (struct partial_symtab *));
4409 subpst->dependencies[0] = pst;
4410 subpst->number_of_dependencies = 1;
4412 subpst->globals_offset = 0;
4413 subpst->n_global_syms = 0;
4414 subpst->statics_offset = 0;
4415 subpst->n_static_syms = 0;
4416 subpst->symtab = NULL;
4417 subpst->read_symtab = pst->read_symtab;
4420 /* No private part is necessary for include psymtabs. This property
4421 can be used to differentiate between such include psymtabs and
4422 the regular ones. */
4423 subpst->read_symtab_private = NULL;
4426 /* Read the Line Number Program data and extract the list of files
4427 included by the source file represented by PST. Build an include
4428 partial symtab for each of these included files. */
4431 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
4432 struct die_info *die,
4433 struct partial_symtab *pst)
4435 struct line_header *lh = NULL;
4436 struct attribute *attr;
4438 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
4440 lh = dwarf_decode_line_header (DW_UNSND (attr), cu);
4442 return; /* No linetable, so no includes. */
4444 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4445 dwarf_decode_lines (lh, pst->dirname, cu, pst, 1);
4447 free_line_header (lh);
4451 hash_signatured_type (const void *item)
4453 const struct signatured_type *sig_type = item;
4455 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4456 return sig_type->signature;
4460 eq_signatured_type (const void *item_lhs, const void *item_rhs)
4462 const struct signatured_type *lhs = item_lhs;
4463 const struct signatured_type *rhs = item_rhs;
4465 return lhs->signature == rhs->signature;
4468 /* Allocate a hash table for signatured types. */
4471 allocate_signatured_type_table (struct objfile *objfile)
4473 return htab_create_alloc_ex (41,
4474 hash_signatured_type,
4477 &objfile->objfile_obstack,
4478 hashtab_obstack_allocate,
4479 dummy_obstack_deallocate);
4482 /* A helper function to add a signatured type CU to a table. */
4485 add_signatured_type_cu_to_table (void **slot, void *datum)
4487 struct signatured_type *sigt = *slot;
4488 struct signatured_type ***datap = datum;
4496 /* Create the hash table of all entries in the .debug_types
4497 (or .debug_types.dwo) section(s).
4498 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4499 otherwise it is NULL.
4501 The result is a pointer to the hash table or NULL if there are no types.
4503 Note: This function processes DWO files only, not DWP files. */
4506 create_debug_types_hash_table (struct dwo_file *dwo_file,
4507 VEC (dwarf2_section_info_def) *types)
4509 struct objfile *objfile = dwarf2_per_objfile->objfile;
4510 htab_t types_htab = NULL;
4512 struct dwarf2_section_info *section;
4513 struct dwarf2_section_info *abbrev_section;
4515 if (VEC_empty (dwarf2_section_info_def, types))
4518 abbrev_section = (dwo_file != NULL
4519 ? &dwo_file->sections.abbrev
4520 : &dwarf2_per_objfile->abbrev);
4522 if (dwarf2_read_debug)
4523 fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n",
4524 dwo_file ? ".dwo" : "",
4525 get_section_file_name (abbrev_section));
4528 VEC_iterate (dwarf2_section_info_def, types, ix, section);
4532 const gdb_byte *info_ptr, *end_ptr;
4534 dwarf2_read_section (objfile, section);
4535 info_ptr = section->buffer;
4537 if (info_ptr == NULL)
4540 /* We can't set abfd until now because the section may be empty or
4541 not present, in which case the bfd is unknown. */
4542 abfd = get_section_bfd_owner (section);
4544 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4545 because we don't need to read any dies: the signature is in the
4548 end_ptr = info_ptr + section->size;
4549 while (info_ptr < end_ptr)
4552 cu_offset type_offset_in_tu;
4554 struct signatured_type *sig_type;
4555 struct dwo_unit *dwo_tu;
4557 const gdb_byte *ptr = info_ptr;
4558 struct comp_unit_head header;
4559 unsigned int length;
4561 offset.sect_off = ptr - section->buffer;
4563 /* We need to read the type's signature in order to build the hash
4564 table, but we don't need anything else just yet. */
4566 ptr = read_and_check_type_unit_head (&header, section,
4567 abbrev_section, ptr,
4568 &signature, &type_offset_in_tu);
4570 length = get_cu_length (&header);
4572 /* Skip dummy type units. */
4573 if (ptr >= info_ptr + length
4574 || peek_abbrev_code (abfd, ptr) == 0)
4580 if (types_htab == NULL)
4583 types_htab = allocate_dwo_unit_table (objfile);
4585 types_htab = allocate_signatured_type_table (objfile);
4591 dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4593 dwo_tu->dwo_file = dwo_file;
4594 dwo_tu->signature = signature;
4595 dwo_tu->type_offset_in_tu = type_offset_in_tu;
4596 dwo_tu->section = section;
4597 dwo_tu->offset = offset;
4598 dwo_tu->length = length;
4602 /* N.B.: type_offset is not usable if this type uses a DWO file.
4603 The real type_offset is in the DWO file. */
4605 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4606 struct signatured_type);
4607 sig_type->signature = signature;
4608 sig_type->type_offset_in_tu = type_offset_in_tu;
4609 sig_type->per_cu.objfile = objfile;
4610 sig_type->per_cu.is_debug_types = 1;
4611 sig_type->per_cu.section = section;
4612 sig_type->per_cu.offset = offset;
4613 sig_type->per_cu.length = length;
4616 slot = htab_find_slot (types_htab,
4617 dwo_file ? (void*) dwo_tu : (void *) sig_type,
4619 gdb_assert (slot != NULL);
4622 sect_offset dup_offset;
4626 const struct dwo_unit *dup_tu = *slot;
4628 dup_offset = dup_tu->offset;
4632 const struct signatured_type *dup_tu = *slot;
4634 dup_offset = dup_tu->per_cu.offset;
4637 complaint (&symfile_complaints,
4638 _("debug type entry at offset 0x%x is duplicate to"
4639 " the entry at offset 0x%x, signature %s"),
4640 offset.sect_off, dup_offset.sect_off,
4641 hex_string (signature));
4643 *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type;
4645 if (dwarf2_read_debug > 1)
4646 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n",
4648 hex_string (signature));
4657 /* Create the hash table of all entries in the .debug_types section,
4658 and initialize all_type_units.
4659 The result is zero if there is an error (e.g. missing .debug_types section),
4660 otherwise non-zero. */
4663 create_all_type_units (struct objfile *objfile)
4666 struct signatured_type **iter;
4668 types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types);
4669 if (types_htab == NULL)
4671 dwarf2_per_objfile->signatured_types = NULL;
4675 dwarf2_per_objfile->signatured_types = types_htab;
4677 dwarf2_per_objfile->n_type_units = htab_elements (types_htab);
4678 dwarf2_per_objfile->all_type_units
4679 = xmalloc (dwarf2_per_objfile->n_type_units
4680 * sizeof (struct signatured_type *));
4681 iter = &dwarf2_per_objfile->all_type_units[0];
4682 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter);
4683 gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0]
4684 == dwarf2_per_objfile->n_type_units);
4689 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4690 Fill in SIG_ENTRY with DWO_ENTRY. */
4693 fill_in_sig_entry_from_dwo_entry (struct objfile *objfile,
4694 struct signatured_type *sig_entry,
4695 struct dwo_unit *dwo_entry)
4697 /* Make sure we're not clobbering something we don't expect to. */
4698 gdb_assert (! sig_entry->per_cu.queued);
4699 gdb_assert (sig_entry->per_cu.cu == NULL);
4700 gdb_assert (sig_entry->per_cu.v.quick != NULL);
4701 gdb_assert (sig_entry->per_cu.v.quick->symtab == NULL);
4702 gdb_assert (sig_entry->signature == dwo_entry->signature);
4703 gdb_assert (sig_entry->type_offset_in_section.sect_off == 0);
4704 gdb_assert (sig_entry->type_unit_group == NULL);
4705 gdb_assert (sig_entry->dwo_unit == NULL);
4707 sig_entry->per_cu.section = dwo_entry->section;
4708 sig_entry->per_cu.offset = dwo_entry->offset;
4709 sig_entry->per_cu.length = dwo_entry->length;
4710 sig_entry->per_cu.reading_dwo_directly = 1;
4711 sig_entry->per_cu.objfile = objfile;
4712 sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu;
4713 sig_entry->dwo_unit = dwo_entry;
4716 /* Subroutine of lookup_signatured_type.
4717 If we haven't read the TU yet, create the signatured_type data structure
4718 for a TU to be read in directly from a DWO file, bypassing the stub.
4719 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4720 using .gdb_index, then when reading a CU we want to stay in the DWO file
4721 containing that CU. Otherwise we could end up reading several other DWO
4722 files (due to comdat folding) to process the transitive closure of all the
4723 mentioned TUs, and that can be slow. The current DWO file will have every
4724 type signature that it needs.
4725 We only do this for .gdb_index because in the psymtab case we already have
4726 to read all the DWOs to build the type unit groups. */
4728 static struct signatured_type *
4729 lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
4731 struct objfile *objfile = dwarf2_per_objfile->objfile;
4732 struct dwo_file *dwo_file;
4733 struct dwo_unit find_dwo_entry, *dwo_entry;
4734 struct signatured_type find_sig_entry, *sig_entry;
4736 gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index);
4738 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4739 dwo_unit of the TU itself. */
4740 dwo_file = cu->dwo_unit->dwo_file;
4742 /* We only ever need to read in one copy of a signatured type.
4743 Just use the global signatured_types array. If this is the first time
4744 we're reading this type, replace the recorded data from .gdb_index with
4747 if (dwarf2_per_objfile->signatured_types == NULL)
4749 find_sig_entry.signature = sig;
4750 sig_entry = htab_find (dwarf2_per_objfile->signatured_types, &find_sig_entry);
4751 if (sig_entry == NULL)
4754 /* We can get here with the TU already read, *or* in the process of being
4755 read. Don't reassign it if that's the case. Also note that if the TU is
4756 already being read, it may not have come from a DWO, the program may be
4757 a mix of Fission-compiled code and non-Fission-compiled code. */
4758 /* Have we already tried to read this TU? */
4759 if (sig_entry->per_cu.tu_read)
4762 /* Ok, this is the first time we're reading this TU. */
4763 if (dwo_file->tus == NULL)
4765 find_dwo_entry.signature = sig;
4766 dwo_entry = htab_find (dwo_file->tus, &find_dwo_entry);
4767 if (dwo_entry == NULL)
4770 fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry);
4771 sig_entry->per_cu.tu_read = 1;
4775 /* Subroutine of lookup_dwp_signatured_type.
4776 Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. */
4778 static struct signatured_type *
4779 add_type_unit (ULONGEST sig)
4781 struct objfile *objfile = dwarf2_per_objfile->objfile;
4782 int n_type_units = dwarf2_per_objfile->n_type_units;
4783 struct signatured_type *sig_type;
4787 dwarf2_per_objfile->all_type_units =
4788 xrealloc (dwarf2_per_objfile->all_type_units,
4789 n_type_units * sizeof (struct signatured_type *));
4790 dwarf2_per_objfile->n_type_units = n_type_units;
4791 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4792 struct signatured_type);
4793 dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type;
4794 sig_type->signature = sig;
4795 sig_type->per_cu.is_debug_types = 1;
4796 sig_type->per_cu.v.quick =
4797 OBSTACK_ZALLOC (&objfile->objfile_obstack,
4798 struct dwarf2_per_cu_quick_data);
4799 slot = htab_find_slot (dwarf2_per_objfile->signatured_types,
4801 gdb_assert (*slot == NULL);
4803 /* The rest of sig_type must be filled in by the caller. */
4807 /* Subroutine of lookup_signatured_type.
4808 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4809 then try the DWP file.
4810 Normally this "can't happen", but if there's a bug in signature
4811 generation and/or the DWP file is built incorrectly, it can happen.
4812 Using the type directly from the DWP file means we don't have the stub
4813 which has some useful attributes (e.g., DW_AT_comp_dir), but they're
4814 not critical. [Eventually the stub may go away for type units anyway.] */
4816 static struct signatured_type *
4817 lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
4819 struct objfile *objfile = dwarf2_per_objfile->objfile;
4820 struct dwp_file *dwp_file = get_dwp_file ();
4821 struct dwo_unit *dwo_entry;
4822 struct signatured_type find_sig_entry, *sig_entry;
4824 gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index);
4825 gdb_assert (dwp_file != NULL);
4827 if (dwarf2_per_objfile->signatured_types != NULL)
4829 find_sig_entry.signature = sig;
4830 sig_entry = htab_find (dwarf2_per_objfile->signatured_types,
4832 if (sig_entry != NULL)
4836 /* This is the "shouldn't happen" case.
4837 Try the DWP file and hope for the best. */
4838 if (dwp_file->tus == NULL)
4840 dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL,
4841 sig, 1 /* is_debug_types */);
4842 if (dwo_entry == NULL)
4845 sig_entry = add_type_unit (sig);
4846 fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry);
4848 /* The caller will signal a complaint if we return NULL.
4849 Here we don't return NULL but we still want to complain. */
4850 complaint (&symfile_complaints,
4851 _("Bad type signature %s referenced by %s at 0x%x,"
4852 " coping by using copy in DWP [in module %s]"),
4854 cu->per_cu->is_debug_types ? "TU" : "CU",
4855 cu->per_cu->offset.sect_off,
4856 objfile_name (objfile));
4861 /* Lookup a signature based type for DW_FORM_ref_sig8.
4862 Returns NULL if signature SIG is not present in the table.
4863 It is up to the caller to complain about this. */
4865 static struct signatured_type *
4866 lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig)
4869 && dwarf2_per_objfile->using_index)
4871 /* We're in a DWO/DWP file, and we're using .gdb_index.
4872 These cases require special processing. */
4873 if (get_dwp_file () == NULL)
4874 return lookup_dwo_signatured_type (cu, sig);
4876 return lookup_dwp_signatured_type (cu, sig);
4880 struct signatured_type find_entry, *entry;
4882 if (dwarf2_per_objfile->signatured_types == NULL)
4884 find_entry.signature = sig;
4885 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
4890 /* Low level DIE reading support. */
4892 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4895 init_cu_die_reader (struct die_reader_specs *reader,
4896 struct dwarf2_cu *cu,
4897 struct dwarf2_section_info *section,
4898 struct dwo_file *dwo_file)
4900 gdb_assert (section->readin && section->buffer != NULL);
4901 reader->abfd = get_section_bfd_owner (section);
4903 reader->dwo_file = dwo_file;
4904 reader->die_section = section;
4905 reader->buffer = section->buffer;
4906 reader->buffer_end = section->buffer + section->size;
4907 reader->comp_dir = NULL;
4910 /* Subroutine of init_cutu_and_read_dies to simplify it.
4911 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
4912 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
4915 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
4916 from it to the DIE in the DWO. If NULL we are skipping the stub.
4917 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
4918 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
4919 attribute of the referencing CU. Exactly one of STUB_COMP_UNIT_DIE and
4920 COMP_DIR must be non-NULL.
4921 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
4922 are filled in with the info of the DIE from the DWO file.
4923 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
4924 provided an abbrev table to use.
4925 The result is non-zero if a valid (non-dummy) DIE was found. */
4928 read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu,
4929 struct dwo_unit *dwo_unit,
4930 int abbrev_table_provided,
4931 struct die_info *stub_comp_unit_die,
4932 const char *stub_comp_dir,
4933 struct die_reader_specs *result_reader,
4934 const gdb_byte **result_info_ptr,
4935 struct die_info **result_comp_unit_die,
4936 int *result_has_children)
4938 struct objfile *objfile = dwarf2_per_objfile->objfile;
4939 struct dwarf2_cu *cu = this_cu->cu;
4940 struct dwarf2_section_info *section;
4942 const gdb_byte *begin_info_ptr, *info_ptr;
4943 const char *comp_dir_string;
4944 ULONGEST signature; /* Or dwo_id. */
4945 struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
4946 int i,num_extra_attrs;
4947 struct dwarf2_section_info *dwo_abbrev_section;
4948 struct attribute *attr;
4949 struct attribute comp_dir_attr;
4950 struct die_info *comp_unit_die;
4952 /* Both can't be provided. */
4953 gdb_assert (! (stub_comp_unit_die && stub_comp_dir));
4955 /* These attributes aren't processed until later:
4956 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4957 However, the attribute is found in the stub which we won't have later.
4958 In order to not impose this complication on the rest of the code,
4959 we read them here and copy them to the DWO CU/TU die. */
4967 if (stub_comp_unit_die != NULL)
4969 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4971 if (! this_cu->is_debug_types)
4972 stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu);
4973 low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu);
4974 high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu);
4975 ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu);
4976 comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu);
4978 /* There should be a DW_AT_addr_base attribute here (if needed).
4979 We need the value before we can process DW_FORM_GNU_addr_index. */
4981 attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu);
4983 cu->addr_base = DW_UNSND (attr);
4985 /* There should be a DW_AT_ranges_base attribute here (if needed).
4986 We need the value before we can process DW_AT_ranges. */
4987 cu->ranges_base = 0;
4988 attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu);
4990 cu->ranges_base = DW_UNSND (attr);
4992 else if (stub_comp_dir != NULL)
4994 /* Reconstruct the comp_dir attribute to simplify the code below. */
4995 comp_dir = (struct attribute *)
4996 obstack_alloc (&cu->comp_unit_obstack, sizeof (*comp_dir));
4997 comp_dir->name = DW_AT_comp_dir;
4998 comp_dir->form = DW_FORM_string;
4999 DW_STRING_IS_CANONICAL (comp_dir) = 0;
5000 DW_STRING (comp_dir) = stub_comp_dir;
5003 /* Set up for reading the DWO CU/TU. */
5004 cu->dwo_unit = dwo_unit;
5005 section = dwo_unit->section;
5006 dwarf2_read_section (objfile, section);
5007 abfd = get_section_bfd_owner (section);
5008 begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
5009 dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
5010 init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file);
5012 if (this_cu->is_debug_types)
5014 ULONGEST header_signature;
5015 cu_offset type_offset_in_tu;
5016 struct signatured_type *sig_type = (struct signatured_type *) this_cu;
5018 info_ptr = read_and_check_type_unit_head (&cu->header, section,
5022 &type_offset_in_tu);
5023 /* This is not an assert because it can be caused by bad debug info. */
5024 if (sig_type->signature != header_signature)
5026 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5027 " TU at offset 0x%x [in module %s]"),
5028 hex_string (sig_type->signature),
5029 hex_string (header_signature),
5030 dwo_unit->offset.sect_off,
5031 bfd_get_filename (abfd));
5033 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
5034 /* For DWOs coming from DWP files, we don't know the CU length
5035 nor the type's offset in the TU until now. */
5036 dwo_unit->length = get_cu_length (&cu->header);
5037 dwo_unit->type_offset_in_tu = type_offset_in_tu;
5039 /* Establish the type offset that can be used to lookup the type.
5040 For DWO files, we don't know it until now. */
5041 sig_type->type_offset_in_section.sect_off =
5042 dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
5046 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
5049 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
5050 /* For DWOs coming from DWP files, we don't know the CU length
5052 dwo_unit->length = get_cu_length (&cu->header);
5055 /* Replace the CU's original abbrev table with the DWO's.
5056 Reminder: We can't read the abbrev table until we've read the header. */
5057 if (abbrev_table_provided)
5059 /* Don't free the provided abbrev table, the caller of
5060 init_cutu_and_read_dies owns it. */
5061 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
5062 /* Ensure the DWO abbrev table gets freed. */
5063 make_cleanup (dwarf2_free_abbrev_table, cu);
5067 dwarf2_free_abbrev_table (cu);
5068 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
5069 /* Leave any existing abbrev table cleanup as is. */
5072 /* Read in the die, but leave space to copy over the attributes
5073 from the stub. This has the benefit of simplifying the rest of
5074 the code - all the work to maintain the illusion of a single
5075 DW_TAG_{compile,type}_unit DIE is done here. */
5076 num_extra_attrs = ((stmt_list != NULL)
5080 + (comp_dir != NULL));
5081 info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr,
5082 result_has_children, num_extra_attrs);
5084 /* Copy over the attributes from the stub to the DIE we just read in. */
5085 comp_unit_die = *result_comp_unit_die;
5086 i = comp_unit_die->num_attrs;
5087 if (stmt_list != NULL)
5088 comp_unit_die->attrs[i++] = *stmt_list;
5090 comp_unit_die->attrs[i++] = *low_pc;
5091 if (high_pc != NULL)
5092 comp_unit_die->attrs[i++] = *high_pc;
5094 comp_unit_die->attrs[i++] = *ranges;
5095 if (comp_dir != NULL)
5096 comp_unit_die->attrs[i++] = *comp_dir;
5097 comp_unit_die->num_attrs += num_extra_attrs;
5099 if (dwarf2_die_debug)
5101 fprintf_unfiltered (gdb_stdlog,
5102 "Read die from %s@0x%x of %s:\n",
5103 get_section_name (section),
5104 (unsigned) (begin_info_ptr - section->buffer),
5105 bfd_get_filename (abfd));
5106 dump_die (comp_unit_die, dwarf2_die_debug);
5109 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5110 TUs by skipping the stub and going directly to the entry in the DWO file.
5111 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5112 to get it via circuitous means. Blech. */
5113 if (comp_dir != NULL)
5114 result_reader->comp_dir = DW_STRING (comp_dir);
5116 /* Skip dummy compilation units. */
5117 if (info_ptr >= begin_info_ptr + dwo_unit->length
5118 || peek_abbrev_code (abfd, info_ptr) == 0)
5121 *result_info_ptr = info_ptr;
5125 /* Subroutine of init_cutu_and_read_dies to simplify it.
5126 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5127 Returns NULL if the specified DWO unit cannot be found. */
5129 static struct dwo_unit *
5130 lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu,
5131 struct die_info *comp_unit_die)
5133 struct dwarf2_cu *cu = this_cu->cu;
5134 struct attribute *attr;
5136 struct dwo_unit *dwo_unit;
5137 const char *comp_dir, *dwo_name;
5139 gdb_assert (cu != NULL);
5141 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5142 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
5143 gdb_assert (attr != NULL);
5144 dwo_name = DW_STRING (attr);
5146 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
5148 comp_dir = DW_STRING (attr);
5150 if (this_cu->is_debug_types)
5152 struct signatured_type *sig_type;
5154 /* Since this_cu is the first member of struct signatured_type,
5155 we can go from a pointer to one to a pointer to the other. */
5156 sig_type = (struct signatured_type *) this_cu;
5157 signature = sig_type->signature;
5158 dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir);
5162 struct attribute *attr;
5164 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
5166 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5168 dwo_name, objfile_name (this_cu->objfile));
5169 signature = DW_UNSND (attr);
5170 dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir,
5177 /* Subroutine of init_cutu_and_read_dies to simplify it.
5178 Read a TU directly from a DWO file, bypassing the stub. */
5181 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, int keep,
5182 die_reader_func_ftype *die_reader_func,
5185 struct dwarf2_cu *cu;
5186 struct signatured_type *sig_type;
5187 struct cleanup *cleanups, *free_cu_cleanup;
5188 struct die_reader_specs reader;
5189 const gdb_byte *info_ptr;
5190 struct die_info *comp_unit_die;
5193 /* Verify we can do the following downcast, and that we have the
5195 gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly);
5196 sig_type = (struct signatured_type *) this_cu;
5197 gdb_assert (sig_type->dwo_unit != NULL);
5199 cleanups = make_cleanup (null_cleanup, NULL);
5201 gdb_assert (this_cu->cu == NULL);
5202 cu = xmalloc (sizeof (*cu));
5203 init_one_comp_unit (cu, this_cu);
5204 /* If an error occurs while loading, release our storage. */
5205 free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
5207 if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit,
5208 0 /* abbrev_table_provided */,
5209 NULL /* stub_comp_unit_die */,
5210 sig_type->dwo_unit->dwo_file->comp_dir,
5212 &comp_unit_die, &has_children) == 0)
5215 do_cleanups (cleanups);
5219 /* All the "real" work is done here. */
5220 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
5222 /* This duplicates some code in init_cutu_and_read_dies,
5223 but the alternative is making the latter more complex.
5224 This function is only for the special case of using DWO files directly:
5225 no point in overly complicating the general case just to handle this. */
5228 /* We've successfully allocated this compilation unit. Let our
5229 caller clean it up when finished with it. */
5230 discard_cleanups (free_cu_cleanup);
5232 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5233 So we have to manually free the abbrev table. */
5234 dwarf2_free_abbrev_table (cu);
5236 /* Link this CU into read_in_chain. */
5237 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
5238 dwarf2_per_objfile->read_in_chain = this_cu;
5241 do_cleanups (free_cu_cleanup);
5243 do_cleanups (cleanups);
5246 /* Initialize a CU (or TU) and read its DIEs.
5247 If the CU defers to a DWO file, read the DWO file as well.
5249 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5250 Otherwise the table specified in the comp unit header is read in and used.
5251 This is an optimization for when we already have the abbrev table.
5253 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5254 Otherwise, a new CU is allocated with xmalloc.
5256 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5257 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5259 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5260 linker) then DIE_READER_FUNC will not get called. */
5263 init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
5264 struct abbrev_table *abbrev_table,
5265 int use_existing_cu, int keep,
5266 die_reader_func_ftype *die_reader_func,
5269 struct objfile *objfile = dwarf2_per_objfile->objfile;
5270 struct dwarf2_section_info *section = this_cu->section;
5271 bfd *abfd = get_section_bfd_owner (section);
5272 struct dwarf2_cu *cu;
5273 const gdb_byte *begin_info_ptr, *info_ptr;
5274 struct die_reader_specs reader;
5275 struct die_info *comp_unit_die;
5277 struct attribute *attr;
5278 struct cleanup *cleanups, *free_cu_cleanup = NULL;
5279 struct signatured_type *sig_type = NULL;
5280 struct dwarf2_section_info *abbrev_section;
5281 /* Non-zero if CU currently points to a DWO file and we need to
5282 reread it. When this happens we need to reread the skeleton die
5283 before we can reread the DWO file (this only applies to CUs, not TUs). */
5284 int rereading_dwo_cu = 0;
5286 if (dwarf2_die_debug)
5287 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
5288 this_cu->is_debug_types ? "type" : "comp",
5289 this_cu->offset.sect_off);
5291 if (use_existing_cu)
5294 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5295 file (instead of going through the stub), short-circuit all of this. */
5296 if (this_cu->reading_dwo_directly)
5298 /* Narrow down the scope of possibilities to have to understand. */
5299 gdb_assert (this_cu->is_debug_types);
5300 gdb_assert (abbrev_table == NULL);
5301 gdb_assert (!use_existing_cu);
5302 init_tu_and_read_dwo_dies (this_cu, keep, die_reader_func, data);
5306 cleanups = make_cleanup (null_cleanup, NULL);
5308 /* This is cheap if the section is already read in. */
5309 dwarf2_read_section (objfile, section);
5311 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
5313 abbrev_section = get_abbrev_section_for_cu (this_cu);
5315 if (use_existing_cu && this_cu->cu != NULL)
5319 /* If this CU is from a DWO file we need to start over, we need to
5320 refetch the attributes from the skeleton CU.
5321 This could be optimized by retrieving those attributes from when we
5322 were here the first time: the previous comp_unit_die was stored in
5323 comp_unit_obstack. But there's no data yet that we need this
5325 if (cu->dwo_unit != NULL)
5326 rereading_dwo_cu = 1;
5330 /* If !use_existing_cu, this_cu->cu must be NULL. */
5331 gdb_assert (this_cu->cu == NULL);
5333 cu = xmalloc (sizeof (*cu));
5334 init_one_comp_unit (cu, this_cu);
5336 /* If an error occurs while loading, release our storage. */
5337 free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
5340 /* Get the header. */
5341 if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu)
5343 /* We already have the header, there's no need to read it in again. */
5344 info_ptr += cu->header.first_die_offset.cu_off;
5348 if (this_cu->is_debug_types)
5351 cu_offset type_offset_in_tu;
5353 info_ptr = read_and_check_type_unit_head (&cu->header, section,
5354 abbrev_section, info_ptr,
5356 &type_offset_in_tu);
5358 /* Since per_cu is the first member of struct signatured_type,
5359 we can go from a pointer to one to a pointer to the other. */
5360 sig_type = (struct signatured_type *) this_cu;
5361 gdb_assert (sig_type->signature == signature);
5362 gdb_assert (sig_type->type_offset_in_tu.cu_off
5363 == type_offset_in_tu.cu_off);
5364 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
5366 /* LENGTH has not been set yet for type units if we're
5367 using .gdb_index. */
5368 this_cu->length = get_cu_length (&cu->header);
5370 /* Establish the type offset that can be used to lookup the type. */
5371 sig_type->type_offset_in_section.sect_off =
5372 this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off;
5376 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
5380 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
5381 gdb_assert (this_cu->length == get_cu_length (&cu->header));
5385 /* Skip dummy compilation units. */
5386 if (info_ptr >= begin_info_ptr + this_cu->length
5387 || peek_abbrev_code (abfd, info_ptr) == 0)
5389 do_cleanups (cleanups);
5393 /* If we don't have them yet, read the abbrevs for this compilation unit.
5394 And if we need to read them now, make sure they're freed when we're
5395 done. Note that it's important that if the CU had an abbrev table
5396 on entry we don't free it when we're done: Somewhere up the call stack
5397 it may be in use. */
5398 if (abbrev_table != NULL)
5400 gdb_assert (cu->abbrev_table == NULL);
5401 gdb_assert (cu->header.abbrev_offset.sect_off
5402 == abbrev_table->offset.sect_off);
5403 cu->abbrev_table = abbrev_table;
5405 else if (cu->abbrev_table == NULL)
5407 dwarf2_read_abbrevs (cu, abbrev_section);
5408 make_cleanup (dwarf2_free_abbrev_table, cu);
5410 else if (rereading_dwo_cu)
5412 dwarf2_free_abbrev_table (cu);
5413 dwarf2_read_abbrevs (cu, abbrev_section);
5416 /* Read the top level CU/TU die. */
5417 init_cu_die_reader (&reader, cu, section, NULL);
5418 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
5420 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5422 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5423 DWO CU, that this test will fail (the attribute will not be present). */
5424 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
5427 struct dwo_unit *dwo_unit;
5428 struct die_info *dwo_comp_unit_die;
5432 complaint (&symfile_complaints,
5433 _("compilation unit with DW_AT_GNU_dwo_name"
5434 " has children (offset 0x%x) [in module %s]"),
5435 this_cu->offset.sect_off, bfd_get_filename (abfd));
5437 dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die);
5438 if (dwo_unit != NULL)
5440 if (read_cutu_die_from_dwo (this_cu, dwo_unit,
5441 abbrev_table != NULL,
5442 comp_unit_die, NULL,
5444 &dwo_comp_unit_die, &has_children) == 0)
5447 do_cleanups (cleanups);
5450 comp_unit_die = dwo_comp_unit_die;
5454 /* Yikes, we couldn't find the rest of the DIE, we only have
5455 the stub. A complaint has already been logged. There's
5456 not much more we can do except pass on the stub DIE to
5457 die_reader_func. We don't want to throw an error on bad
5462 /* All of the above is setup for this call. Yikes. */
5463 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
5465 /* Done, clean up. */
5466 if (free_cu_cleanup != NULL)
5470 /* We've successfully allocated this compilation unit. Let our
5471 caller clean it up when finished with it. */
5472 discard_cleanups (free_cu_cleanup);
5474 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5475 So we have to manually free the abbrev table. */
5476 dwarf2_free_abbrev_table (cu);
5478 /* Link this CU into read_in_chain. */
5479 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
5480 dwarf2_per_objfile->read_in_chain = this_cu;
5483 do_cleanups (free_cu_cleanup);
5486 do_cleanups (cleanups);
5489 /* Read CU/TU THIS_CU in section SECTION,
5490 but do not follow DW_AT_GNU_dwo_name if present.
5491 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
5492 to have already done the lookup to find the DWO/DWP file).
5494 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5495 THIS_CU->is_debug_types, but nothing else.
5497 We fill in THIS_CU->length.
5499 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5500 linker) then DIE_READER_FUNC will not get called.
5502 THIS_CU->cu is always freed when done.
5503 This is done in order to not leave THIS_CU->cu in a state where we have
5504 to care whether it refers to the "main" CU or the DWO CU. */
5507 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu,
5508 struct dwarf2_section_info *abbrev_section,
5509 struct dwo_file *dwo_file,
5510 die_reader_func_ftype *die_reader_func,
5513 struct objfile *objfile = dwarf2_per_objfile->objfile;
5514 struct dwarf2_section_info *section = this_cu->section;
5515 bfd *abfd = get_section_bfd_owner (section);
5516 struct dwarf2_cu cu;
5517 const gdb_byte *begin_info_ptr, *info_ptr;
5518 struct die_reader_specs reader;
5519 struct cleanup *cleanups;
5520 struct die_info *comp_unit_die;
5523 if (dwarf2_die_debug)
5524 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
5525 this_cu->is_debug_types ? "type" : "comp",
5526 this_cu->offset.sect_off);
5528 gdb_assert (this_cu->cu == NULL);
5530 /* This is cheap if the section is already read in. */
5531 dwarf2_read_section (objfile, section);
5533 init_one_comp_unit (&cu, this_cu);
5535 cleanups = make_cleanup (free_stack_comp_unit, &cu);
5537 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
5538 info_ptr = read_and_check_comp_unit_head (&cu.header, section,
5539 abbrev_section, info_ptr,
5540 this_cu->is_debug_types);
5542 this_cu->length = get_cu_length (&cu.header);
5544 /* Skip dummy compilation units. */
5545 if (info_ptr >= begin_info_ptr + this_cu->length
5546 || peek_abbrev_code (abfd, info_ptr) == 0)
5548 do_cleanups (cleanups);
5552 dwarf2_read_abbrevs (&cu, abbrev_section);
5553 make_cleanup (dwarf2_free_abbrev_table, &cu);
5555 init_cu_die_reader (&reader, &cu, section, dwo_file);
5556 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
5558 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
5560 do_cleanups (cleanups);
5563 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5564 does not lookup the specified DWO file.
5565 This cannot be used to read DWO files.
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.
5570 We can revisit this if the data shows there's a performance issue. */
5573 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu,
5574 die_reader_func_ftype *die_reader_func,
5577 init_cutu_and_read_dies_no_follow (this_cu,
5578 get_abbrev_section_for_cu (this_cu),
5580 die_reader_func, data);
5583 /* Type Unit Groups.
5585 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5586 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5587 so that all types coming from the same compilation (.o file) are grouped
5588 together. A future step could be to put the types in the same symtab as
5589 the CU the types ultimately came from. */
5592 hash_type_unit_group (const void *item)
5594 const struct type_unit_group *tu_group = item;
5596 return hash_stmt_list_entry (&tu_group->hash);
5600 eq_type_unit_group (const void *item_lhs, const void *item_rhs)
5602 const struct type_unit_group *lhs = item_lhs;
5603 const struct type_unit_group *rhs = item_rhs;
5605 return eq_stmt_list_entry (&lhs->hash, &rhs->hash);
5608 /* Allocate a hash table for type unit groups. */
5611 allocate_type_unit_groups_table (void)
5613 return htab_create_alloc_ex (3,
5614 hash_type_unit_group,
5617 &dwarf2_per_objfile->objfile->objfile_obstack,
5618 hashtab_obstack_allocate,
5619 dummy_obstack_deallocate);
5622 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5623 partial symtabs. We combine several TUs per psymtab to not let the size
5624 of any one psymtab grow too big. */
5625 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5626 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5628 /* Helper routine for get_type_unit_group.
5629 Create the type_unit_group object used to hold one or more TUs. */
5631 static struct type_unit_group *
5632 create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct)
5634 struct objfile *objfile = dwarf2_per_objfile->objfile;
5635 struct dwarf2_per_cu_data *per_cu;
5636 struct type_unit_group *tu_group;
5638 tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5639 struct type_unit_group);
5640 per_cu = &tu_group->per_cu;
5641 per_cu->objfile = objfile;
5643 if (dwarf2_per_objfile->using_index)
5645 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5646 struct dwarf2_per_cu_quick_data);
5650 unsigned int line_offset = line_offset_struct.sect_off;
5651 struct partial_symtab *pst;
5654 /* Give the symtab a useful name for debug purposes. */
5655 if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
5656 name = xstrprintf ("<type_units_%d>",
5657 (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
5659 name = xstrprintf ("<type_units_at_0x%x>", line_offset);
5661 pst = create_partial_symtab (per_cu, name);
5667 tu_group->hash.dwo_unit = cu->dwo_unit;
5668 tu_group->hash.line_offset = line_offset_struct;
5673 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5674 STMT_LIST is a DW_AT_stmt_list attribute. */
5676 static struct type_unit_group *
5677 get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list)
5679 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
5680 struct type_unit_group *tu_group;
5682 unsigned int line_offset;
5683 struct type_unit_group type_unit_group_for_lookup;
5685 if (dwarf2_per_objfile->type_unit_groups == NULL)
5687 dwarf2_per_objfile->type_unit_groups =
5688 allocate_type_unit_groups_table ();
5691 /* Do we need to create a new group, or can we use an existing one? */
5695 line_offset = DW_UNSND (stmt_list);
5696 ++tu_stats->nr_symtab_sharers;
5700 /* Ugh, no stmt_list. Rare, but we have to handle it.
5701 We can do various things here like create one group per TU or
5702 spread them over multiple groups to split up the expansion work.
5703 To avoid worst case scenarios (too many groups or too large groups)
5704 we, umm, group them in bunches. */
5705 line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5706 | (tu_stats->nr_stmt_less_type_units
5707 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE));
5708 ++tu_stats->nr_stmt_less_type_units;
5711 type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit;
5712 type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset;
5713 slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups,
5714 &type_unit_group_for_lookup, INSERT);
5718 gdb_assert (tu_group != NULL);
5722 sect_offset line_offset_struct;
5724 line_offset_struct.sect_off = line_offset;
5725 tu_group = create_type_unit_group (cu, line_offset_struct);
5727 ++tu_stats->nr_symtabs;
5733 /* Struct used to sort TUs by their abbreviation table offset. */
5735 struct tu_abbrev_offset
5737 struct signatured_type *sig_type;
5738 sect_offset abbrev_offset;
5741 /* Helper routine for build_type_unit_groups, passed to qsort. */
5744 sort_tu_by_abbrev_offset (const void *ap, const void *bp)
5746 const struct tu_abbrev_offset * const *a = ap;
5747 const struct tu_abbrev_offset * const *b = bp;
5748 unsigned int aoff = (*a)->abbrev_offset.sect_off;
5749 unsigned int boff = (*b)->abbrev_offset.sect_off;
5751 return (aoff > boff) - (aoff < boff);
5754 /* A helper function to add a type_unit_group to a table. */
5757 add_type_unit_group_to_table (void **slot, void *datum)
5759 struct type_unit_group *tu_group = *slot;
5760 struct type_unit_group ***datap = datum;
5768 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5769 each one passing FUNC,DATA.
5771 The efficiency is because we sort TUs by the abbrev table they use and
5772 only read each abbrev table once. In one program there are 200K TUs
5773 sharing 8K abbrev tables.
5775 The main purpose of this function is to support building the
5776 dwarf2_per_objfile->type_unit_groups table.
5777 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5778 can collapse the search space by grouping them by stmt_list.
5779 The savings can be significant, in the same program from above the 200K TUs
5780 share 8K stmt_list tables.
5782 FUNC is expected to call get_type_unit_group, which will create the
5783 struct type_unit_group if necessary and add it to
5784 dwarf2_per_objfile->type_unit_groups. */
5787 build_type_unit_groups (die_reader_func_ftype *func, void *data)
5789 struct objfile *objfile = dwarf2_per_objfile->objfile;
5790 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
5791 struct cleanup *cleanups;
5792 struct abbrev_table *abbrev_table;
5793 sect_offset abbrev_offset;
5794 struct tu_abbrev_offset *sorted_by_abbrev;
5795 struct type_unit_group **iter;
5798 /* It's up to the caller to not call us multiple times. */
5799 gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL);
5801 if (dwarf2_per_objfile->n_type_units == 0)
5804 /* TUs typically share abbrev tables, and there can be way more TUs than
5805 abbrev tables. Sort by abbrev table to reduce the number of times we
5806 read each abbrev table in.
5807 Alternatives are to punt or to maintain a cache of abbrev tables.
5808 This is simpler and efficient enough for now.
5810 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5811 symtab to use). Typically TUs with the same abbrev offset have the same
5812 stmt_list value too so in practice this should work well.
5814 The basic algorithm here is:
5816 sort TUs by abbrev table
5817 for each TU with same abbrev table:
5818 read abbrev table if first user
5819 read TU top level DIE
5820 [IWBN if DWO skeletons had DW_AT_stmt_list]
5823 if (dwarf2_read_debug)
5824 fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n");
5826 /* Sort in a separate table to maintain the order of all_type_units
5827 for .gdb_index: TU indices directly index all_type_units. */
5828 sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset,
5829 dwarf2_per_objfile->n_type_units);
5830 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
5832 struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i];
5834 sorted_by_abbrev[i].sig_type = sig_type;
5835 sorted_by_abbrev[i].abbrev_offset =
5836 read_abbrev_offset (sig_type->per_cu.section,
5837 sig_type->per_cu.offset);
5839 cleanups = make_cleanup (xfree, sorted_by_abbrev);
5840 qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units,
5841 sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset);
5843 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5844 called any number of times, so we don't reset tu_stats here. */
5846 abbrev_offset.sect_off = ~(unsigned) 0;
5847 abbrev_table = NULL;
5848 make_cleanup (abbrev_table_free_cleanup, &abbrev_table);
5850 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
5852 const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i];
5854 /* Switch to the next abbrev table if necessary. */
5855 if (abbrev_table == NULL
5856 || tu->abbrev_offset.sect_off != abbrev_offset.sect_off)
5858 if (abbrev_table != NULL)
5860 abbrev_table_free (abbrev_table);
5861 /* Reset to NULL in case abbrev_table_read_table throws
5862 an error: abbrev_table_free_cleanup will get called. */
5863 abbrev_table = NULL;
5865 abbrev_offset = tu->abbrev_offset;
5867 abbrev_table_read_table (&dwarf2_per_objfile->abbrev,
5869 ++tu_stats->nr_uniq_abbrev_tables;
5872 init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0,
5876 /* type_unit_groups can be NULL if there is an error in the debug info.
5877 Just create an empty table so the rest of gdb doesn't have to watch
5878 for this error case. */
5879 if (dwarf2_per_objfile->type_unit_groups == NULL)
5881 dwarf2_per_objfile->type_unit_groups =
5882 allocate_type_unit_groups_table ();
5883 dwarf2_per_objfile->n_type_unit_groups = 0;
5886 /* Create a vector of pointers to primary type units to make it easy to
5887 iterate over them and CUs. See dw2_get_primary_cu. */
5888 dwarf2_per_objfile->n_type_unit_groups =
5889 htab_elements (dwarf2_per_objfile->type_unit_groups);
5890 dwarf2_per_objfile->all_type_unit_groups =
5891 obstack_alloc (&objfile->objfile_obstack,
5892 dwarf2_per_objfile->n_type_unit_groups
5893 * sizeof (struct type_unit_group *));
5894 iter = &dwarf2_per_objfile->all_type_unit_groups[0];
5895 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
5896 add_type_unit_group_to_table, &iter);
5897 gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0]
5898 == dwarf2_per_objfile->n_type_unit_groups);
5900 do_cleanups (cleanups);
5902 if (dwarf2_read_debug)
5904 fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n");
5905 fprintf_unfiltered (gdb_stdlog, " %d TUs\n",
5906 dwarf2_per_objfile->n_type_units);
5907 fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n",
5908 tu_stats->nr_uniq_abbrev_tables);
5909 fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n",
5910 tu_stats->nr_symtabs);
5911 fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n",
5912 tu_stats->nr_symtab_sharers);
5913 fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n",
5914 tu_stats->nr_stmt_less_type_units);
5918 /* Partial symbol tables. */
5920 /* Create a psymtab named NAME and assign it to PER_CU.
5922 The caller must fill in the following details:
5923 dirname, textlow, texthigh. */
5925 static struct partial_symtab *
5926 create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
5928 struct objfile *objfile = per_cu->objfile;
5929 struct partial_symtab *pst;
5931 pst = start_psymtab_common (objfile, objfile->section_offsets,
5933 objfile->global_psymbols.next,
5934 objfile->static_psymbols.next);
5936 pst->psymtabs_addrmap_supported = 1;
5938 /* This is the glue that links PST into GDB's symbol API. */
5939 pst->read_symtab_private = per_cu;
5940 pst->read_symtab = dwarf2_read_symtab;
5941 per_cu->v.psymtab = pst;
5946 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5949 struct process_psymtab_comp_unit_data
5951 /* True if we are reading a DW_TAG_partial_unit. */
5953 int want_partial_unit;
5955 /* The "pretend" language that is used if the CU doesn't declare a
5958 enum language pretend_language;
5961 /* die_reader_func for process_psymtab_comp_unit. */
5964 process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
5965 const gdb_byte *info_ptr,
5966 struct die_info *comp_unit_die,
5970 struct dwarf2_cu *cu = reader->cu;
5971 struct objfile *objfile = cu->objfile;
5972 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
5973 struct attribute *attr;
5975 CORE_ADDR best_lowpc = 0, best_highpc = 0;
5976 struct partial_symtab *pst;
5978 const char *filename;
5979 struct process_psymtab_comp_unit_data *info = data;
5981 if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit)
5984 gdb_assert (! per_cu->is_debug_types);
5986 prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language);
5988 cu->list_in_scope = &file_symbols;
5990 /* Allocate a new partial symbol table structure. */
5991 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
5992 if (attr == NULL || !DW_STRING (attr))
5995 filename = DW_STRING (attr);
5997 pst = create_partial_symtab (per_cu, filename);
5999 /* This must be done before calling dwarf2_build_include_psymtabs. */
6000 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
6002 pst->dirname = DW_STRING (attr);
6004 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6006 dwarf2_find_base_address (comp_unit_die, cu);
6008 /* Possibly set the default values of LOWPC and HIGHPC from
6010 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
6011 &best_highpc, cu, pst);
6012 if (has_pc_info == 1 && best_lowpc < best_highpc)
6013 /* Store the contiguous range if it is not empty; it can be empty for
6014 CUs with no code. */
6015 addrmap_set_empty (objfile->psymtabs_addrmap,
6016 best_lowpc + baseaddr,
6017 best_highpc + baseaddr - 1, pst);
6019 /* Check if comp unit has_children.
6020 If so, read the rest of the partial symbols from this comp unit.
6021 If not, there's no more debug_info for this comp unit. */
6024 struct partial_die_info *first_die;
6025 CORE_ADDR lowpc, highpc;
6027 lowpc = ((CORE_ADDR) -1);
6028 highpc = ((CORE_ADDR) 0);
6030 first_die = load_partial_dies (reader, info_ptr, 1);
6032 scan_partial_symbols (first_die, &lowpc, &highpc,
6035 /* If we didn't find a lowpc, set it to highpc to avoid
6036 complaints from `maint check'. */
6037 if (lowpc == ((CORE_ADDR) -1))
6040 /* If the compilation unit didn't have an explicit address range,
6041 then use the information extracted from its child dies. */
6045 best_highpc = highpc;
6048 pst->textlow = best_lowpc + baseaddr;
6049 pst->texthigh = best_highpc + baseaddr;
6051 pst->n_global_syms = objfile->global_psymbols.next -
6052 (objfile->global_psymbols.list + pst->globals_offset);
6053 pst->n_static_syms = objfile->static_psymbols.next -
6054 (objfile->static_psymbols.list + pst->statics_offset);
6055 sort_pst_symbols (objfile, pst);
6057 if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs))
6060 int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
6061 struct dwarf2_per_cu_data *iter;
6063 /* Fill in 'dependencies' here; we fill in 'users' in a
6065 pst->number_of_dependencies = len;
6066 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
6067 len * sizeof (struct symtab *));
6069 VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
6072 pst->dependencies[i] = iter->v.psymtab;
6074 VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
6077 /* Get the list of files included in the current compilation unit,
6078 and build a psymtab for each of them. */
6079 dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
6081 if (dwarf2_read_debug)
6083 struct gdbarch *gdbarch = get_objfile_arch (objfile);
6085 fprintf_unfiltered (gdb_stdlog,
6086 "Psymtab for %s unit @0x%x: %s - %s"
6087 ", %d global, %d static syms\n",
6088 per_cu->is_debug_types ? "type" : "comp",
6089 per_cu->offset.sect_off,
6090 paddress (gdbarch, pst->textlow),
6091 paddress (gdbarch, pst->texthigh),
6092 pst->n_global_syms, pst->n_static_syms);
6096 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6097 Process compilation unit THIS_CU for a psymtab. */
6100 process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
6101 int want_partial_unit,
6102 enum language pretend_language)
6104 struct process_psymtab_comp_unit_data info;
6106 /* If this compilation unit was already read in, free the
6107 cached copy in order to read it in again. This is
6108 necessary because we skipped some symbols when we first
6109 read in the compilation unit (see load_partial_dies).
6110 This problem could be avoided, but the benefit is unclear. */
6111 if (this_cu->cu != NULL)
6112 free_one_cached_comp_unit (this_cu);
6114 gdb_assert (! this_cu->is_debug_types);
6115 info.want_partial_unit = want_partial_unit;
6116 info.pretend_language = pretend_language;
6117 init_cutu_and_read_dies (this_cu, NULL, 0, 0,
6118 process_psymtab_comp_unit_reader,
6121 /* Age out any secondary CUs. */
6122 age_cached_comp_units ();
6125 /* Reader function for build_type_psymtabs. */
6128 build_type_psymtabs_reader (const struct die_reader_specs *reader,
6129 const gdb_byte *info_ptr,
6130 struct die_info *type_unit_die,
6134 struct objfile *objfile = dwarf2_per_objfile->objfile;
6135 struct dwarf2_cu *cu = reader->cu;
6136 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
6137 struct signatured_type *sig_type;
6138 struct type_unit_group *tu_group;
6139 struct attribute *attr;
6140 struct partial_die_info *first_die;
6141 CORE_ADDR lowpc, highpc;
6142 struct partial_symtab *pst;
6144 gdb_assert (data == NULL);
6145 gdb_assert (per_cu->is_debug_types);
6146 sig_type = (struct signatured_type *) per_cu;
6151 attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
6152 tu_group = get_type_unit_group (cu, attr);
6154 VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type);
6156 prepare_one_comp_unit (cu, type_unit_die, language_minimal);
6157 cu->list_in_scope = &file_symbols;
6158 pst = create_partial_symtab (per_cu, "");
6161 first_die = load_partial_dies (reader, info_ptr, 1);
6163 lowpc = (CORE_ADDR) -1;
6164 highpc = (CORE_ADDR) 0;
6165 scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu);
6167 pst->n_global_syms = objfile->global_psymbols.next -
6168 (objfile->global_psymbols.list + pst->globals_offset);
6169 pst->n_static_syms = objfile->static_psymbols.next -
6170 (objfile->static_psymbols.list + pst->statics_offset);
6171 sort_pst_symbols (objfile, pst);
6174 /* Traversal function for build_type_psymtabs. */
6177 build_type_psymtab_dependencies (void **slot, void *info)
6179 struct objfile *objfile = dwarf2_per_objfile->objfile;
6180 struct type_unit_group *tu_group = (struct type_unit_group *) *slot;
6181 struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu;
6182 struct partial_symtab *pst = per_cu->v.psymtab;
6183 int len = VEC_length (sig_type_ptr, tu_group->tus);
6184 struct signatured_type *iter;
6187 gdb_assert (len > 0);
6188 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu));
6190 pst->number_of_dependencies = len;
6191 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
6192 len * sizeof (struct psymtab *));
6194 VEC_iterate (sig_type_ptr, tu_group->tus, i, iter);
6197 gdb_assert (iter->per_cu.is_debug_types);
6198 pst->dependencies[i] = iter->per_cu.v.psymtab;
6199 iter->type_unit_group = tu_group;
6202 VEC_free (sig_type_ptr, tu_group->tus);
6207 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6208 Build partial symbol tables for the .debug_types comp-units. */
6211 build_type_psymtabs (struct objfile *objfile)
6213 if (! create_all_type_units (objfile))
6216 build_type_unit_groups (build_type_psymtabs_reader, NULL);
6218 /* Now that all TUs have been processed we can fill in the dependencies. */
6219 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
6220 build_type_psymtab_dependencies, NULL);
6223 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6226 psymtabs_addrmap_cleanup (void *o)
6228 struct objfile *objfile = o;
6230 objfile->psymtabs_addrmap = NULL;
6233 /* Compute the 'user' field for each psymtab in OBJFILE. */
6236 set_partial_user (struct objfile *objfile)
6240 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
6242 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
6243 struct partial_symtab *pst = per_cu->v.psymtab;
6249 for (j = 0; j < pst->number_of_dependencies; ++j)
6251 /* Set the 'user' field only if it is not already set. */
6252 if (pst->dependencies[j]->user == NULL)
6253 pst->dependencies[j]->user = pst;
6258 /* Build the partial symbol table by doing a quick pass through the
6259 .debug_info and .debug_abbrev sections. */
6262 dwarf2_build_psymtabs_hard (struct objfile *objfile)
6264 struct cleanup *back_to, *addrmap_cleanup;
6265 struct obstack temp_obstack;
6268 if (dwarf2_read_debug)
6270 fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n",
6271 objfile_name (objfile));
6274 dwarf2_per_objfile->reading_partial_symbols = 1;
6276 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
6278 /* Any cached compilation units will be linked by the per-objfile
6279 read_in_chain. Make sure to free them when we're done. */
6280 back_to = make_cleanup (free_cached_comp_units, NULL);
6282 build_type_psymtabs (objfile);
6284 create_all_comp_units (objfile);
6286 /* Create a temporary address map on a temporary obstack. We later
6287 copy this to the final obstack. */
6288 obstack_init (&temp_obstack);
6289 make_cleanup_obstack_free (&temp_obstack);
6290 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
6291 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
6293 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
6295 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
6297 process_psymtab_comp_unit (per_cu, 0, language_minimal);
6300 set_partial_user (objfile);
6302 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
6303 &objfile->objfile_obstack);
6304 discard_cleanups (addrmap_cleanup);
6306 do_cleanups (back_to);
6308 if (dwarf2_read_debug)
6309 fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n",
6310 objfile_name (objfile));
6313 /* die_reader_func for load_partial_comp_unit. */
6316 load_partial_comp_unit_reader (const struct die_reader_specs *reader,
6317 const gdb_byte *info_ptr,
6318 struct die_info *comp_unit_die,
6322 struct dwarf2_cu *cu = reader->cu;
6324 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
6326 /* Check if comp unit has_children.
6327 If so, read the rest of the partial symbols from this comp unit.
6328 If not, there's no more debug_info for this comp unit. */
6330 load_partial_dies (reader, info_ptr, 0);
6333 /* Load the partial DIEs for a secondary CU into memory.
6334 This is also used when rereading a primary CU with load_all_dies. */
6337 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
6339 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
6340 load_partial_comp_unit_reader, NULL);
6344 read_comp_units_from_section (struct objfile *objfile,
6345 struct dwarf2_section_info *section,
6346 unsigned int is_dwz,
6349 struct dwarf2_per_cu_data ***all_comp_units)
6351 const gdb_byte *info_ptr;
6352 bfd *abfd = get_section_bfd_owner (section);
6354 if (dwarf2_read_debug)
6355 fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n",
6356 get_section_name (section),
6357 get_section_file_name (section));
6359 dwarf2_read_section (objfile, section);
6361 info_ptr = section->buffer;
6363 while (info_ptr < section->buffer + section->size)
6365 unsigned int length, initial_length_size;
6366 struct dwarf2_per_cu_data *this_cu;
6369 offset.sect_off = info_ptr - section->buffer;
6371 /* Read just enough information to find out where the next
6372 compilation unit is. */
6373 length = read_initial_length (abfd, info_ptr, &initial_length_size);
6375 /* Save the compilation unit for later lookup. */
6376 this_cu = obstack_alloc (&objfile->objfile_obstack,
6377 sizeof (struct dwarf2_per_cu_data));
6378 memset (this_cu, 0, sizeof (*this_cu));
6379 this_cu->offset = offset;
6380 this_cu->length = length + initial_length_size;
6381 this_cu->is_dwz = is_dwz;
6382 this_cu->objfile = objfile;
6383 this_cu->section = section;
6385 if (*n_comp_units == *n_allocated)
6388 *all_comp_units = xrealloc (*all_comp_units,
6390 * sizeof (struct dwarf2_per_cu_data *));
6392 (*all_comp_units)[*n_comp_units] = this_cu;
6395 info_ptr = info_ptr + this_cu->length;
6399 /* Create a list of all compilation units in OBJFILE.
6400 This is only done for -readnow and building partial symtabs. */
6403 create_all_comp_units (struct objfile *objfile)
6407 struct dwarf2_per_cu_data **all_comp_units;
6408 struct dwz_file *dwz;
6412 all_comp_units = xmalloc (n_allocated
6413 * sizeof (struct dwarf2_per_cu_data *));
6415 read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0,
6416 &n_allocated, &n_comp_units, &all_comp_units);
6418 dwz = dwarf2_get_dwz_file ();
6420 read_comp_units_from_section (objfile, &dwz->info, 1,
6421 &n_allocated, &n_comp_units,
6424 dwarf2_per_objfile->all_comp_units
6425 = obstack_alloc (&objfile->objfile_obstack,
6426 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
6427 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
6428 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
6429 xfree (all_comp_units);
6430 dwarf2_per_objfile->n_comp_units = n_comp_units;
6433 /* Process all loaded DIEs for compilation unit CU, starting at
6434 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
6435 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6436 DW_AT_ranges). If NEED_PC is set, then this function will set
6437 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
6438 and record the covered ranges in the addrmap. */
6441 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
6442 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
6444 struct partial_die_info *pdi;
6446 /* Now, march along the PDI's, descending into ones which have
6447 interesting children but skipping the children of the other ones,
6448 until we reach the end of the compilation unit. */
6454 fixup_partial_die (pdi, cu);
6456 /* Anonymous namespaces or modules have no name but have interesting
6457 children, so we need to look at them. Ditto for anonymous
6460 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
6461 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type
6462 || pdi->tag == DW_TAG_imported_unit)
6466 case DW_TAG_subprogram:
6467 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
6469 case DW_TAG_constant:
6470 case DW_TAG_variable:
6471 case DW_TAG_typedef:
6472 case DW_TAG_union_type:
6473 if (!pdi->is_declaration)
6475 add_partial_symbol (pdi, cu);
6478 case DW_TAG_class_type:
6479 case DW_TAG_interface_type:
6480 case DW_TAG_structure_type:
6481 if (!pdi->is_declaration)
6483 add_partial_symbol (pdi, cu);
6486 case DW_TAG_enumeration_type:
6487 if (!pdi->is_declaration)
6488 add_partial_enumeration (pdi, cu);
6490 case DW_TAG_base_type:
6491 case DW_TAG_subrange_type:
6492 /* File scope base type definitions are added to the partial
6494 add_partial_symbol (pdi, cu);
6496 case DW_TAG_namespace:
6497 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
6500 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
6502 case DW_TAG_imported_unit:
6504 struct dwarf2_per_cu_data *per_cu;
6506 /* For now we don't handle imported units in type units. */
6507 if (cu->per_cu->is_debug_types)
6509 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6510 " supported in type units [in module %s]"),
6511 objfile_name (cu->objfile));
6514 per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset,
6518 /* Go read the partial unit, if needed. */
6519 if (per_cu->v.psymtab == NULL)
6520 process_psymtab_comp_unit (per_cu, 1, cu->language);
6522 VEC_safe_push (dwarf2_per_cu_ptr,
6523 cu->per_cu->imported_symtabs, per_cu);
6526 case DW_TAG_imported_declaration:
6527 add_partial_symbol (pdi, cu);
6534 /* If the die has a sibling, skip to the sibling. */
6536 pdi = pdi->die_sibling;
6540 /* Functions used to compute the fully scoped name of a partial DIE.
6542 Normally, this is simple. For C++, the parent DIE's fully scoped
6543 name is concatenated with "::" and the partial DIE's name. For
6544 Java, the same thing occurs except that "." is used instead of "::".
6545 Enumerators are an exception; they use the scope of their parent
6546 enumeration type, i.e. the name of the enumeration type is not
6547 prepended to the enumerator.
6549 There are two complexities. One is DW_AT_specification; in this
6550 case "parent" means the parent of the target of the specification,
6551 instead of the direct parent of the DIE. The other is compilers
6552 which do not emit DW_TAG_namespace; in this case we try to guess
6553 the fully qualified name of structure types from their members'
6554 linkage names. This must be done using the DIE's children rather
6555 than the children of any DW_AT_specification target. We only need
6556 to do this for structures at the top level, i.e. if the target of
6557 any DW_AT_specification (if any; otherwise the DIE itself) does not
6560 /* Compute the scope prefix associated with PDI's parent, in
6561 compilation unit CU. The result will be allocated on CU's
6562 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6563 field. NULL is returned if no prefix is necessary. */
6565 partial_die_parent_scope (struct partial_die_info *pdi,
6566 struct dwarf2_cu *cu)
6568 const char *grandparent_scope;
6569 struct partial_die_info *parent, *real_pdi;
6571 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6572 then this means the parent of the specification DIE. */
6575 while (real_pdi->has_specification)
6576 real_pdi = find_partial_die (real_pdi->spec_offset,
6577 real_pdi->spec_is_dwz, cu);
6579 parent = real_pdi->die_parent;
6583 if (parent->scope_set)
6584 return parent->scope;
6586 fixup_partial_die (parent, cu);
6588 grandparent_scope = partial_die_parent_scope (parent, cu);
6590 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6591 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6592 Work around this problem here. */
6593 if (cu->language == language_cplus
6594 && parent->tag == DW_TAG_namespace
6595 && strcmp (parent->name, "::") == 0
6596 && grandparent_scope == NULL)
6598 parent->scope = NULL;
6599 parent->scope_set = 1;
6603 if (pdi->tag == DW_TAG_enumerator)
6604 /* Enumerators should not get the name of the enumeration as a prefix. */
6605 parent->scope = grandparent_scope;
6606 else if (parent->tag == DW_TAG_namespace
6607 || parent->tag == DW_TAG_module
6608 || parent->tag == DW_TAG_structure_type
6609 || parent->tag == DW_TAG_class_type
6610 || parent->tag == DW_TAG_interface_type
6611 || parent->tag == DW_TAG_union_type
6612 || parent->tag == DW_TAG_enumeration_type)
6614 if (grandparent_scope == NULL)
6615 parent->scope = parent->name;
6617 parent->scope = typename_concat (&cu->comp_unit_obstack,
6619 parent->name, 0, cu);
6623 /* FIXME drow/2004-04-01: What should we be doing with
6624 function-local names? For partial symbols, we should probably be
6626 complaint (&symfile_complaints,
6627 _("unhandled containing DIE tag %d for DIE at %d"),
6628 parent->tag, pdi->offset.sect_off);
6629 parent->scope = grandparent_scope;
6632 parent->scope_set = 1;
6633 return parent->scope;
6636 /* Return the fully scoped name associated with PDI, from compilation unit
6637 CU. The result will be allocated with malloc. */
6640 partial_die_full_name (struct partial_die_info *pdi,
6641 struct dwarf2_cu *cu)
6643 const char *parent_scope;
6645 /* If this is a template instantiation, we can not work out the
6646 template arguments from partial DIEs. So, unfortunately, we have
6647 to go through the full DIEs. At least any work we do building
6648 types here will be reused if full symbols are loaded later. */
6649 if (pdi->has_template_arguments)
6651 fixup_partial_die (pdi, cu);
6653 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
6655 struct die_info *die;
6656 struct attribute attr;
6657 struct dwarf2_cu *ref_cu = cu;
6659 /* DW_FORM_ref_addr is using section offset. */
6661 attr.form = DW_FORM_ref_addr;
6662 attr.u.unsnd = pdi->offset.sect_off;
6663 die = follow_die_ref (NULL, &attr, &ref_cu);
6665 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
6669 parent_scope = partial_die_parent_scope (pdi, cu);
6670 if (parent_scope == NULL)
6673 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
6677 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
6679 struct objfile *objfile = cu->objfile;
6681 const char *actual_name = NULL;
6683 char *built_actual_name;
6685 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6687 built_actual_name = partial_die_full_name (pdi, cu);
6688 if (built_actual_name != NULL)
6689 actual_name = built_actual_name;
6691 if (actual_name == NULL)
6692 actual_name = pdi->name;
6696 case DW_TAG_subprogram:
6697 if (pdi->is_external || cu->language == language_ada)
6699 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6700 of the global scope. But in Ada, we want to be able to access
6701 nested procedures globally. So all Ada subprograms are stored
6702 in the global scope. */
6703 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6704 mst_text, objfile); */
6705 add_psymbol_to_list (actual_name, strlen (actual_name),
6706 built_actual_name != NULL,
6707 VAR_DOMAIN, LOC_BLOCK,
6708 &objfile->global_psymbols,
6709 0, pdi->lowpc + baseaddr,
6710 cu->language, objfile);
6714 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6715 mst_file_text, objfile); */
6716 add_psymbol_to_list (actual_name, strlen (actual_name),
6717 built_actual_name != NULL,
6718 VAR_DOMAIN, LOC_BLOCK,
6719 &objfile->static_psymbols,
6720 0, pdi->lowpc + baseaddr,
6721 cu->language, objfile);
6724 case DW_TAG_constant:
6726 struct psymbol_allocation_list *list;
6728 if (pdi->is_external)
6729 list = &objfile->global_psymbols;
6731 list = &objfile->static_psymbols;
6732 add_psymbol_to_list (actual_name, strlen (actual_name),
6733 built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC,
6734 list, 0, 0, cu->language, objfile);
6737 case DW_TAG_variable:
6739 addr = decode_locdesc (pdi->d.locdesc, cu);
6743 && !dwarf2_per_objfile->has_section_at_zero)
6745 /* A global or static variable may also have been stripped
6746 out by the linker if unused, in which case its address
6747 will be nullified; do not add such variables into partial
6748 symbol table then. */
6750 else if (pdi->is_external)
6753 Don't enter into the minimal symbol tables as there is
6754 a minimal symbol table entry from the ELF symbols already.
6755 Enter into partial symbol table if it has a location
6756 descriptor or a type.
6757 If the location descriptor is missing, new_symbol will create
6758 a LOC_UNRESOLVED symbol, the address of the variable will then
6759 be determined from the minimal symbol table whenever the variable
6761 The address for the partial symbol table entry is not
6762 used by GDB, but it comes in handy for debugging partial symbol
6765 if (pdi->d.locdesc || pdi->has_type)
6766 add_psymbol_to_list (actual_name, strlen (actual_name),
6767 built_actual_name != NULL,
6768 VAR_DOMAIN, LOC_STATIC,
6769 &objfile->global_psymbols,
6771 cu->language, objfile);
6775 /* Static Variable. Skip symbols without location descriptors. */
6776 if (pdi->d.locdesc == NULL)
6778 xfree (built_actual_name);
6781 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6782 mst_file_data, objfile); */
6783 add_psymbol_to_list (actual_name, strlen (actual_name),
6784 built_actual_name != NULL,
6785 VAR_DOMAIN, LOC_STATIC,
6786 &objfile->static_psymbols,
6788 cu->language, objfile);
6791 case DW_TAG_typedef:
6792 case DW_TAG_base_type:
6793 case DW_TAG_subrange_type:
6794 add_psymbol_to_list (actual_name, strlen (actual_name),
6795 built_actual_name != NULL,
6796 VAR_DOMAIN, LOC_TYPEDEF,
6797 &objfile->static_psymbols,
6798 0, (CORE_ADDR) 0, cu->language, objfile);
6800 case DW_TAG_imported_declaration:
6801 case DW_TAG_namespace:
6802 add_psymbol_to_list (actual_name, strlen (actual_name),
6803 built_actual_name != NULL,
6804 VAR_DOMAIN, LOC_TYPEDEF,
6805 &objfile->global_psymbols,
6806 0, (CORE_ADDR) 0, cu->language, objfile);
6809 add_psymbol_to_list (actual_name, strlen (actual_name),
6810 built_actual_name != NULL,
6811 MODULE_DOMAIN, LOC_TYPEDEF,
6812 &objfile->global_psymbols,
6813 0, (CORE_ADDR) 0, cu->language, objfile);
6815 case DW_TAG_class_type:
6816 case DW_TAG_interface_type:
6817 case DW_TAG_structure_type:
6818 case DW_TAG_union_type:
6819 case DW_TAG_enumeration_type:
6820 /* Skip external references. The DWARF standard says in the section
6821 about "Structure, Union, and Class Type Entries": "An incomplete
6822 structure, union or class type is represented by a structure,
6823 union or class entry that does not have a byte size attribute
6824 and that has a DW_AT_declaration attribute." */
6825 if (!pdi->has_byte_size && pdi->is_declaration)
6827 xfree (built_actual_name);
6831 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6832 static vs. global. */
6833 add_psymbol_to_list (actual_name, strlen (actual_name),
6834 built_actual_name != NULL,
6835 STRUCT_DOMAIN, LOC_TYPEDEF,
6836 (cu->language == language_cplus
6837 || cu->language == language_java)
6838 ? &objfile->global_psymbols
6839 : &objfile->static_psymbols,
6840 0, (CORE_ADDR) 0, cu->language, objfile);
6843 case DW_TAG_enumerator:
6844 add_psymbol_to_list (actual_name, strlen (actual_name),
6845 built_actual_name != NULL,
6846 VAR_DOMAIN, LOC_CONST,
6847 (cu->language == language_cplus
6848 || cu->language == language_java)
6849 ? &objfile->global_psymbols
6850 : &objfile->static_psymbols,
6851 0, (CORE_ADDR) 0, cu->language, objfile);
6857 xfree (built_actual_name);
6860 /* Read a partial die corresponding to a namespace; also, add a symbol
6861 corresponding to that namespace to the symbol table. NAMESPACE is
6862 the name of the enclosing namespace. */
6865 add_partial_namespace (struct partial_die_info *pdi,
6866 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6867 int need_pc, struct dwarf2_cu *cu)
6869 /* Add a symbol for the namespace. */
6871 add_partial_symbol (pdi, cu);
6873 /* Now scan partial symbols in that namespace. */
6875 if (pdi->has_children)
6876 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
6879 /* Read a partial die corresponding to a Fortran module. */
6882 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
6883 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
6885 /* Add a symbol for the namespace. */
6887 add_partial_symbol (pdi, cu);
6889 /* Now scan partial symbols in that module. */
6891 if (pdi->has_children)
6892 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
6895 /* Read a partial die corresponding to a subprogram and create a partial
6896 symbol for that subprogram. When the CU language allows it, this
6897 routine also defines a partial symbol for each nested subprogram
6898 that this subprogram contains.
6900 DIE my also be a lexical block, in which case we simply search
6901 recursively for suprograms defined inside that lexical block.
6902 Again, this is only performed when the CU language allows this
6903 type of definitions. */
6906 add_partial_subprogram (struct partial_die_info *pdi,
6907 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6908 int need_pc, struct dwarf2_cu *cu)
6910 if (pdi->tag == DW_TAG_subprogram)
6912 if (pdi->has_pc_info)
6914 if (pdi->lowpc < *lowpc)
6915 *lowpc = pdi->lowpc;
6916 if (pdi->highpc > *highpc)
6917 *highpc = pdi->highpc;
6921 struct objfile *objfile = cu->objfile;
6923 baseaddr = ANOFFSET (objfile->section_offsets,
6924 SECT_OFF_TEXT (objfile));
6925 addrmap_set_empty (objfile->psymtabs_addrmap,
6926 pdi->lowpc + baseaddr,
6927 pdi->highpc - 1 + baseaddr,
6928 cu->per_cu->v.psymtab);
6932 if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined))
6934 if (!pdi->is_declaration)
6935 /* Ignore subprogram DIEs that do not have a name, they are
6936 illegal. Do not emit a complaint at this point, we will
6937 do so when we convert this psymtab into a symtab. */
6939 add_partial_symbol (pdi, cu);
6943 if (! pdi->has_children)
6946 if (cu->language == language_ada)
6948 pdi = pdi->die_child;
6951 fixup_partial_die (pdi, cu);
6952 if (pdi->tag == DW_TAG_subprogram
6953 || pdi->tag == DW_TAG_lexical_block)
6954 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
6955 pdi = pdi->die_sibling;
6960 /* Read a partial die corresponding to an enumeration type. */
6963 add_partial_enumeration (struct partial_die_info *enum_pdi,
6964 struct dwarf2_cu *cu)
6966 struct partial_die_info *pdi;
6968 if (enum_pdi->name != NULL)
6969 add_partial_symbol (enum_pdi, cu);
6971 pdi = enum_pdi->die_child;
6974 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
6975 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6977 add_partial_symbol (pdi, cu);
6978 pdi = pdi->die_sibling;
6982 /* Return the initial uleb128 in the die at INFO_PTR. */
6985 peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr)
6987 unsigned int bytes_read;
6989 return read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6992 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6993 Return the corresponding abbrev, or NULL if the number is zero (indicating
6994 an empty DIE). In either case *BYTES_READ will be set to the length of
6995 the initial number. */
6997 static struct abbrev_info *
6998 peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read,
6999 struct dwarf2_cu *cu)
7001 bfd *abfd = cu->objfile->obfd;
7002 unsigned int abbrev_number;
7003 struct abbrev_info *abbrev;
7005 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
7007 if (abbrev_number == 0)
7010 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
7013 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
7014 abbrev_number, bfd_get_filename (abfd));
7020 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7021 Returns a pointer to the end of a series of DIEs, terminated by an empty
7022 DIE. Any children of the skipped DIEs will also be skipped. */
7024 static const gdb_byte *
7025 skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr)
7027 struct dwarf2_cu *cu = reader->cu;
7028 struct abbrev_info *abbrev;
7029 unsigned int bytes_read;
7033 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
7035 return info_ptr + bytes_read;
7037 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
7041 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7042 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7043 abbrev corresponding to that skipped uleb128 should be passed in
7044 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7047 static const gdb_byte *
7048 skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr,
7049 struct abbrev_info *abbrev)
7051 unsigned int bytes_read;
7052 struct attribute attr;
7053 bfd *abfd = reader->abfd;
7054 struct dwarf2_cu *cu = reader->cu;
7055 const gdb_byte *buffer = reader->buffer;
7056 const gdb_byte *buffer_end = reader->buffer_end;
7057 const gdb_byte *start_info_ptr = info_ptr;
7058 unsigned int form, i;
7060 for (i = 0; i < abbrev->num_attrs; i++)
7062 /* The only abbrev we care about is DW_AT_sibling. */
7063 if (abbrev->attrs[i].name == DW_AT_sibling)
7065 read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
7066 if (attr.form == DW_FORM_ref_addr)
7067 complaint (&symfile_complaints,
7068 _("ignoring absolute DW_AT_sibling"));
7071 unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off;
7072 const gdb_byte *sibling_ptr = buffer + off;
7074 if (sibling_ptr < info_ptr)
7075 complaint (&symfile_complaints,
7076 _("DW_AT_sibling points backwards"));
7082 /* If it isn't DW_AT_sibling, skip this attribute. */
7083 form = abbrev->attrs[i].form;
7087 case DW_FORM_ref_addr:
7088 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7089 and later it is offset sized. */
7090 if (cu->header.version == 2)
7091 info_ptr += cu->header.addr_size;
7093 info_ptr += cu->header.offset_size;
7095 case DW_FORM_GNU_ref_alt:
7096 info_ptr += cu->header.offset_size;
7099 info_ptr += cu->header.addr_size;
7106 case DW_FORM_flag_present:
7118 case DW_FORM_ref_sig8:
7121 case DW_FORM_string:
7122 read_direct_string (abfd, info_ptr, &bytes_read);
7123 info_ptr += bytes_read;
7125 case DW_FORM_sec_offset:
7127 case DW_FORM_GNU_strp_alt:
7128 info_ptr += cu->header.offset_size;
7130 case DW_FORM_exprloc:
7132 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7133 info_ptr += bytes_read;
7135 case DW_FORM_block1:
7136 info_ptr += 1 + read_1_byte (abfd, info_ptr);
7138 case DW_FORM_block2:
7139 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
7141 case DW_FORM_block4:
7142 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
7146 case DW_FORM_ref_udata:
7147 case DW_FORM_GNU_addr_index:
7148 case DW_FORM_GNU_str_index:
7149 info_ptr = safe_skip_leb128 (info_ptr, buffer_end);
7151 case DW_FORM_indirect:
7152 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7153 info_ptr += bytes_read;
7154 /* We need to continue parsing from here, so just go back to
7156 goto skip_attribute;
7159 error (_("Dwarf Error: Cannot handle %s "
7160 "in DWARF reader [in module %s]"),
7161 dwarf_form_name (form),
7162 bfd_get_filename (abfd));
7166 if (abbrev->has_children)
7167 return skip_children (reader, info_ptr);
7172 /* Locate ORIG_PDI's sibling.
7173 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7175 static const gdb_byte *
7176 locate_pdi_sibling (const struct die_reader_specs *reader,
7177 struct partial_die_info *orig_pdi,
7178 const gdb_byte *info_ptr)
7180 /* Do we know the sibling already? */
7182 if (orig_pdi->sibling)
7183 return orig_pdi->sibling;
7185 /* Are there any children to deal with? */
7187 if (!orig_pdi->has_children)
7190 /* Skip the children the long way. */
7192 return skip_children (reader, info_ptr);
7195 /* Expand this partial symbol table into a full symbol table. SELF is
7199 dwarf2_read_symtab (struct partial_symtab *self,
7200 struct objfile *objfile)
7204 warning (_("bug: psymtab for %s is already read in."),
7211 printf_filtered (_("Reading in symbols for %s..."),
7213 gdb_flush (gdb_stdout);
7216 /* Restore our global data. */
7217 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
7219 /* If this psymtab is constructed from a debug-only objfile, the
7220 has_section_at_zero flag will not necessarily be correct. We
7221 can get the correct value for this flag by looking at the data
7222 associated with the (presumably stripped) associated objfile. */
7223 if (objfile->separate_debug_objfile_backlink)
7225 struct dwarf2_per_objfile *dpo_backlink
7226 = objfile_data (objfile->separate_debug_objfile_backlink,
7227 dwarf2_objfile_data_key);
7229 dwarf2_per_objfile->has_section_at_zero
7230 = dpo_backlink->has_section_at_zero;
7233 dwarf2_per_objfile->reading_partial_symbols = 0;
7235 psymtab_to_symtab_1 (self);
7237 /* Finish up the debug error message. */
7239 printf_filtered (_("done.\n"));
7242 process_cu_includes ();
7245 /* Reading in full CUs. */
7247 /* Add PER_CU to the queue. */
7250 queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
7251 enum language pretend_language)
7253 struct dwarf2_queue_item *item;
7256 item = xmalloc (sizeof (*item));
7257 item->per_cu = per_cu;
7258 item->pretend_language = pretend_language;
7261 if (dwarf2_queue == NULL)
7262 dwarf2_queue = item;
7264 dwarf2_queue_tail->next = item;
7266 dwarf2_queue_tail = item;
7269 /* If PER_CU is not yet queued, add it to the queue.
7270 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7272 The result is non-zero if PER_CU was queued, otherwise the result is zero
7273 meaning either PER_CU is already queued or it is already loaded.
7275 N.B. There is an invariant here that if a CU is queued then it is loaded.
7276 The caller is required to load PER_CU if we return non-zero. */
7279 maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu,
7280 struct dwarf2_per_cu_data *per_cu,
7281 enum language pretend_language)
7283 /* We may arrive here during partial symbol reading, if we need full
7284 DIEs to process an unusual case (e.g. template arguments). Do
7285 not queue PER_CU, just tell our caller to load its DIEs. */
7286 if (dwarf2_per_objfile->reading_partial_symbols)
7288 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
7293 /* Mark the dependence relation so that we don't flush PER_CU
7295 if (dependent_cu != NULL)
7296 dwarf2_add_dependence (dependent_cu, per_cu);
7298 /* If it's already on the queue, we have nothing to do. */
7302 /* If the compilation unit is already loaded, just mark it as
7304 if (per_cu->cu != NULL)
7306 per_cu->cu->last_used = 0;
7310 /* Add it to the queue. */
7311 queue_comp_unit (per_cu, pretend_language);
7316 /* Process the queue. */
7319 process_queue (void)
7321 struct dwarf2_queue_item *item, *next_item;
7323 if (dwarf2_read_debug)
7325 fprintf_unfiltered (gdb_stdlog,
7326 "Expanding one or more symtabs of objfile %s ...\n",
7327 objfile_name (dwarf2_per_objfile->objfile));
7330 /* The queue starts out with one item, but following a DIE reference
7331 may load a new CU, adding it to the end of the queue. */
7332 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
7334 if (dwarf2_per_objfile->using_index
7335 ? !item->per_cu->v.quick->symtab
7336 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
7338 struct dwarf2_per_cu_data *per_cu = item->per_cu;
7339 unsigned int debug_print_threshold;
7342 if (per_cu->is_debug_types)
7344 struct signatured_type *sig_type =
7345 (struct signatured_type *) per_cu;
7347 sprintf (buf, "TU %s at offset 0x%x",
7348 hex_string (sig_type->signature),
7349 per_cu->offset.sect_off);
7350 /* There can be 100s of TUs.
7351 Only print them in verbose mode. */
7352 debug_print_threshold = 2;
7356 sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off);
7357 debug_print_threshold = 1;
7360 if (dwarf2_read_debug >= debug_print_threshold)
7361 fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf);
7363 if (per_cu->is_debug_types)
7364 process_full_type_unit (per_cu, item->pretend_language);
7366 process_full_comp_unit (per_cu, item->pretend_language);
7368 if (dwarf2_read_debug >= debug_print_threshold)
7369 fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf);
7372 item->per_cu->queued = 0;
7373 next_item = item->next;
7377 dwarf2_queue_tail = NULL;
7379 if (dwarf2_read_debug)
7381 fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n",
7382 objfile_name (dwarf2_per_objfile->objfile));
7386 /* Free all allocated queue entries. This function only releases anything if
7387 an error was thrown; if the queue was processed then it would have been
7388 freed as we went along. */
7391 dwarf2_release_queue (void *dummy)
7393 struct dwarf2_queue_item *item, *last;
7395 item = dwarf2_queue;
7398 /* Anything still marked queued is likely to be in an
7399 inconsistent state, so discard it. */
7400 if (item->per_cu->queued)
7402 if (item->per_cu->cu != NULL)
7403 free_one_cached_comp_unit (item->per_cu);
7404 item->per_cu->queued = 0;
7412 dwarf2_queue = dwarf2_queue_tail = NULL;
7415 /* Read in full symbols for PST, and anything it depends on. */
7418 psymtab_to_symtab_1 (struct partial_symtab *pst)
7420 struct dwarf2_per_cu_data *per_cu;
7426 for (i = 0; i < pst->number_of_dependencies; i++)
7427 if (!pst->dependencies[i]->readin
7428 && pst->dependencies[i]->user == NULL)
7430 /* Inform about additional files that need to be read in. */
7433 /* FIXME: i18n: Need to make this a single string. */
7434 fputs_filtered (" ", gdb_stdout);
7436 fputs_filtered ("and ", gdb_stdout);
7438 printf_filtered ("%s...", pst->dependencies[i]->filename);
7439 wrap_here (""); /* Flush output. */
7440 gdb_flush (gdb_stdout);
7442 psymtab_to_symtab_1 (pst->dependencies[i]);
7445 per_cu = pst->read_symtab_private;
7449 /* It's an include file, no symbols to read for it.
7450 Everything is in the parent symtab. */
7455 dw2_do_instantiate_symtab (per_cu);
7458 /* Trivial hash function for die_info: the hash value of a DIE
7459 is its offset in .debug_info for this objfile. */
7462 die_hash (const void *item)
7464 const struct die_info *die = item;
7466 return die->offset.sect_off;
7469 /* Trivial comparison function for die_info structures: two DIEs
7470 are equal if they have the same offset. */
7473 die_eq (const void *item_lhs, const void *item_rhs)
7475 const struct die_info *die_lhs = item_lhs;
7476 const struct die_info *die_rhs = item_rhs;
7478 return die_lhs->offset.sect_off == die_rhs->offset.sect_off;
7481 /* die_reader_func for load_full_comp_unit.
7482 This is identical to read_signatured_type_reader,
7483 but is kept separate for now. */
7486 load_full_comp_unit_reader (const struct die_reader_specs *reader,
7487 const gdb_byte *info_ptr,
7488 struct die_info *comp_unit_die,
7492 struct dwarf2_cu *cu = reader->cu;
7493 enum language *language_ptr = data;
7495 gdb_assert (cu->die_hash == NULL);
7497 htab_create_alloc_ex (cu->header.length / 12,
7501 &cu->comp_unit_obstack,
7502 hashtab_obstack_allocate,
7503 dummy_obstack_deallocate);
7506 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
7507 &info_ptr, comp_unit_die);
7508 cu->dies = comp_unit_die;
7509 /* comp_unit_die is not stored in die_hash, no need. */
7511 /* We try not to read any attributes in this function, because not
7512 all CUs needed for references have been loaded yet, and symbol
7513 table processing isn't initialized. But we have to set the CU language,
7514 or we won't be able to build types correctly.
7515 Similarly, if we do not read the producer, we can not apply
7516 producer-specific interpretation. */
7517 prepare_one_comp_unit (cu, cu->dies, *language_ptr);
7520 /* Load the DIEs associated with PER_CU into memory. */
7523 load_full_comp_unit (struct dwarf2_per_cu_data *this_cu,
7524 enum language pretend_language)
7526 gdb_assert (! this_cu->is_debug_types);
7528 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
7529 load_full_comp_unit_reader, &pretend_language);
7532 /* Add a DIE to the delayed physname list. */
7535 add_to_method_list (struct type *type, int fnfield_index, int index,
7536 const char *name, struct die_info *die,
7537 struct dwarf2_cu *cu)
7539 struct delayed_method_info mi;
7541 mi.fnfield_index = fnfield_index;
7545 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
7548 /* A cleanup for freeing the delayed method list. */
7551 free_delayed_list (void *ptr)
7553 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
7554 if (cu->method_list != NULL)
7556 VEC_free (delayed_method_info, cu->method_list);
7557 cu->method_list = NULL;
7561 /* Compute the physnames of any methods on the CU's method list.
7563 The computation of method physnames is delayed in order to avoid the
7564 (bad) condition that one of the method's formal parameters is of an as yet
7568 compute_delayed_physnames (struct dwarf2_cu *cu)
7571 struct delayed_method_info *mi;
7572 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
7574 const char *physname;
7575 struct fn_fieldlist *fn_flp
7576 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
7577 physname = dwarf2_physname (mi->name, mi->die, cu);
7578 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
7582 /* Go objects should be embedded in a DW_TAG_module DIE,
7583 and it's not clear if/how imported objects will appear.
7584 To keep Go support simple until that's worked out,
7585 go back through what we've read and create something usable.
7586 We could do this while processing each DIE, and feels kinda cleaner,
7587 but that way is more invasive.
7588 This is to, for example, allow the user to type "p var" or "b main"
7589 without having to specify the package name, and allow lookups
7590 of module.object to work in contexts that use the expression
7594 fixup_go_packaging (struct dwarf2_cu *cu)
7596 char *package_name = NULL;
7597 struct pending *list;
7600 for (list = global_symbols; list != NULL; list = list->next)
7602 for (i = 0; i < list->nsyms; ++i)
7604 struct symbol *sym = list->symbol[i];
7606 if (SYMBOL_LANGUAGE (sym) == language_go
7607 && SYMBOL_CLASS (sym) == LOC_BLOCK)
7609 char *this_package_name = go_symbol_package_name (sym);
7611 if (this_package_name == NULL)
7613 if (package_name == NULL)
7614 package_name = this_package_name;
7617 if (strcmp (package_name, this_package_name) != 0)
7618 complaint (&symfile_complaints,
7619 _("Symtab %s has objects from two different Go packages: %s and %s"),
7620 (SYMBOL_SYMTAB (sym)
7621 ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym))
7622 : objfile_name (cu->objfile)),
7623 this_package_name, package_name);
7624 xfree (this_package_name);
7630 if (package_name != NULL)
7632 struct objfile *objfile = cu->objfile;
7633 const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack,
7635 strlen (package_name));
7636 struct type *type = init_type (TYPE_CODE_MODULE, 0, 0,
7637 saved_package_name, objfile);
7640 TYPE_TAG_NAME (type) = TYPE_NAME (type);
7642 sym = allocate_symbol (objfile);
7643 SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack);
7644 SYMBOL_SET_NAMES (sym, saved_package_name,
7645 strlen (saved_package_name), 0, objfile);
7646 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7647 e.g., "main" finds the "main" module and not C's main(). */
7648 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
7649 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
7650 SYMBOL_TYPE (sym) = type;
7652 add_symbol_to_list (sym, &global_symbols);
7654 xfree (package_name);
7658 /* Return the symtab for PER_CU. This works properly regardless of
7659 whether we're using the index or psymtabs. */
7661 static struct symtab *
7662 get_symtab (struct dwarf2_per_cu_data *per_cu)
7664 return (dwarf2_per_objfile->using_index
7665 ? per_cu->v.quick->symtab
7666 : per_cu->v.psymtab->symtab);
7669 /* A helper function for computing the list of all symbol tables
7670 included by PER_CU. */
7673 recursively_compute_inclusions (VEC (symtab_ptr) **result,
7674 htab_t all_children, htab_t all_type_symtabs,
7675 struct dwarf2_per_cu_data *per_cu,
7676 struct symtab *immediate_parent)
7680 struct symtab *symtab;
7681 struct dwarf2_per_cu_data *iter;
7683 slot = htab_find_slot (all_children, per_cu, INSERT);
7686 /* This inclusion and its children have been processed. */
7691 /* Only add a CU if it has a symbol table. */
7692 symtab = get_symtab (per_cu);
7695 /* If this is a type unit only add its symbol table if we haven't
7696 seen it yet (type unit per_cu's can share symtabs). */
7697 if (per_cu->is_debug_types)
7699 slot = htab_find_slot (all_type_symtabs, symtab, INSERT);
7703 VEC_safe_push (symtab_ptr, *result, symtab);
7704 if (symtab->user == NULL)
7705 symtab->user = immediate_parent;
7710 VEC_safe_push (symtab_ptr, *result, symtab);
7711 if (symtab->user == NULL)
7712 symtab->user = immediate_parent;
7717 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter);
7720 recursively_compute_inclusions (result, all_children,
7721 all_type_symtabs, iter, symtab);
7725 /* Compute the symtab 'includes' fields for the symtab related to
7729 compute_symtab_includes (struct dwarf2_per_cu_data *per_cu)
7731 gdb_assert (! per_cu->is_debug_types);
7733 if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs))
7736 struct dwarf2_per_cu_data *per_cu_iter;
7737 struct symtab *symtab_iter;
7738 VEC (symtab_ptr) *result_symtabs = NULL;
7739 htab_t all_children, all_type_symtabs;
7740 struct symtab *symtab = get_symtab (per_cu);
7742 /* If we don't have a symtab, we can just skip this case. */
7746 all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
7747 NULL, xcalloc, xfree);
7748 all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
7749 NULL, xcalloc, xfree);
7752 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs,
7756 recursively_compute_inclusions (&result_symtabs, all_children,
7757 all_type_symtabs, per_cu_iter,
7761 /* Now we have a transitive closure of all the included symtabs. */
7762 len = VEC_length (symtab_ptr, result_symtabs);
7764 = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack,
7765 (len + 1) * sizeof (struct symtab *));
7767 VEC_iterate (symtab_ptr, result_symtabs, ix, symtab_iter);
7769 symtab->includes[ix] = symtab_iter;
7770 symtab->includes[len] = NULL;
7772 VEC_free (symtab_ptr, result_symtabs);
7773 htab_delete (all_children);
7774 htab_delete (all_type_symtabs);
7778 /* Compute the 'includes' field for the symtabs of all the CUs we just
7782 process_cu_includes (void)
7785 struct dwarf2_per_cu_data *iter;
7788 VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus,
7792 if (! iter->is_debug_types)
7793 compute_symtab_includes (iter);
7796 VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus);
7799 /* Generate full symbol information for PER_CU, whose DIEs have
7800 already been loaded into memory. */
7803 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
7804 enum language pretend_language)
7806 struct dwarf2_cu *cu = per_cu->cu;
7807 struct objfile *objfile = per_cu->objfile;
7808 CORE_ADDR lowpc, highpc;
7809 struct symtab *symtab;
7810 struct cleanup *back_to, *delayed_list_cleanup;
7812 struct block *static_block;
7814 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7817 back_to = make_cleanup (really_free_pendings, NULL);
7818 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
7820 cu->list_in_scope = &file_symbols;
7822 cu->language = pretend_language;
7823 cu->language_defn = language_def (cu->language);
7825 /* Do line number decoding in read_file_scope () */
7826 process_die (cu->dies, cu);
7828 /* For now fudge the Go package. */
7829 if (cu->language == language_go)
7830 fixup_go_packaging (cu);
7832 /* Now that we have processed all the DIEs in the CU, all the types
7833 should be complete, and it should now be safe to compute all of the
7835 compute_delayed_physnames (cu);
7836 do_cleanups (delayed_list_cleanup);
7838 /* Some compilers don't define a DW_AT_high_pc attribute for the
7839 compilation unit. If the DW_AT_high_pc is missing, synthesize
7840 it, by scanning the DIE's below the compilation unit. */
7841 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
7844 = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1);
7846 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7847 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7848 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7849 addrmap to help ensure it has an accurate map of pc values belonging to
7851 dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu);
7853 symtab = end_symtab_from_static_block (static_block, objfile,
7854 SECT_OFF_TEXT (objfile), 0);
7858 int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer);
7860 /* Set symtab language to language from DW_AT_language. If the
7861 compilation is from a C file generated by language preprocessors, do
7862 not set the language if it was already deduced by start_subfile. */
7863 if (!(cu->language == language_c && symtab->language != language_c))
7864 symtab->language = cu->language;
7866 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7867 produce DW_AT_location with location lists but it can be possibly
7868 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7869 there were bugs in prologue debug info, fixed later in GCC-4.5
7870 by "unwind info for epilogues" patch (which is not directly related).
7872 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7873 needed, it would be wrong due to missing DW_AT_producer there.
7875 Still one can confuse GDB by using non-standard GCC compilation
7876 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7878 if (cu->has_loclist && gcc_4_minor >= 5)
7879 symtab->locations_valid = 1;
7881 if (gcc_4_minor >= 5)
7882 symtab->epilogue_unwind_valid = 1;
7884 symtab->call_site_htab = cu->call_site_htab;
7887 if (dwarf2_per_objfile->using_index)
7888 per_cu->v.quick->symtab = symtab;
7891 struct partial_symtab *pst = per_cu->v.psymtab;
7892 pst->symtab = symtab;
7896 /* Push it for inclusion processing later. */
7897 VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu);
7899 do_cleanups (back_to);
7902 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7903 already been loaded into memory. */
7906 process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
7907 enum language pretend_language)
7909 struct dwarf2_cu *cu = per_cu->cu;
7910 struct objfile *objfile = per_cu->objfile;
7911 struct symtab *symtab;
7912 struct cleanup *back_to, *delayed_list_cleanup;
7913 struct signatured_type *sig_type;
7915 gdb_assert (per_cu->is_debug_types);
7916 sig_type = (struct signatured_type *) per_cu;
7919 back_to = make_cleanup (really_free_pendings, NULL);
7920 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
7922 cu->list_in_scope = &file_symbols;
7924 cu->language = pretend_language;
7925 cu->language_defn = language_def (cu->language);
7927 /* The symbol tables are set up in read_type_unit_scope. */
7928 process_die (cu->dies, cu);
7930 /* For now fudge the Go package. */
7931 if (cu->language == language_go)
7932 fixup_go_packaging (cu);
7934 /* Now that we have processed all the DIEs in the CU, all the types
7935 should be complete, and it should now be safe to compute all of the
7937 compute_delayed_physnames (cu);
7938 do_cleanups (delayed_list_cleanup);
7940 /* TUs share symbol tables.
7941 If this is the first TU to use this symtab, complete the construction
7942 of it with end_expandable_symtab. Otherwise, complete the addition of
7943 this TU's symbols to the existing symtab. */
7944 if (sig_type->type_unit_group->primary_symtab == NULL)
7946 symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
7947 sig_type->type_unit_group->primary_symtab = symtab;
7951 /* Set symtab language to language from DW_AT_language. If the
7952 compilation is from a C file generated by language preprocessors,
7953 do not set the language if it was already deduced by
7955 if (!(cu->language == language_c && symtab->language != language_c))
7956 symtab->language = cu->language;
7961 augment_type_symtab (objfile,
7962 sig_type->type_unit_group->primary_symtab);
7963 symtab = sig_type->type_unit_group->primary_symtab;
7966 if (dwarf2_per_objfile->using_index)
7967 per_cu->v.quick->symtab = symtab;
7970 struct partial_symtab *pst = per_cu->v.psymtab;
7971 pst->symtab = symtab;
7975 do_cleanups (back_to);
7978 /* Process an imported unit DIE. */
7981 process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
7983 struct attribute *attr;
7985 /* For now we don't handle imported units in type units. */
7986 if (cu->per_cu->is_debug_types)
7988 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7989 " supported in type units [in module %s]"),
7990 objfile_name (cu->objfile));
7993 attr = dwarf2_attr (die, DW_AT_import, cu);
7996 struct dwarf2_per_cu_data *per_cu;
7997 struct symtab *imported_symtab;
8001 offset = dwarf2_get_ref_die_offset (attr);
8002 is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz);
8003 per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile);
8005 /* If necessary, add it to the queue and load its DIEs. */
8006 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
8007 load_full_comp_unit (per_cu, cu->language);
8009 VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
8014 /* Reset the in_process bit of a die. */
8017 reset_die_in_process (void *arg)
8019 struct die_info *die = arg;
8021 die->in_process = 0;
8024 /* Process a die and its children. */
8027 process_die (struct die_info *die, struct dwarf2_cu *cu)
8029 struct cleanup *in_process;
8031 /* We should only be processing those not already in process. */
8032 gdb_assert (!die->in_process);
8034 die->in_process = 1;
8035 in_process = make_cleanup (reset_die_in_process,die);
8039 case DW_TAG_padding:
8041 case DW_TAG_compile_unit:
8042 case DW_TAG_partial_unit:
8043 read_file_scope (die, cu);
8045 case DW_TAG_type_unit:
8046 read_type_unit_scope (die, cu);
8048 case DW_TAG_subprogram:
8049 case DW_TAG_inlined_subroutine:
8050 read_func_scope (die, cu);
8052 case DW_TAG_lexical_block:
8053 case DW_TAG_try_block:
8054 case DW_TAG_catch_block:
8055 read_lexical_block_scope (die, cu);
8057 case DW_TAG_GNU_call_site:
8058 read_call_site_scope (die, cu);
8060 case DW_TAG_class_type:
8061 case DW_TAG_interface_type:
8062 case DW_TAG_structure_type:
8063 case DW_TAG_union_type:
8064 process_structure_scope (die, cu);
8066 case DW_TAG_enumeration_type:
8067 process_enumeration_scope (die, cu);
8070 /* These dies have a type, but processing them does not create
8071 a symbol or recurse to process the children. Therefore we can
8072 read them on-demand through read_type_die. */
8073 case DW_TAG_subroutine_type:
8074 case DW_TAG_set_type:
8075 case DW_TAG_array_type:
8076 case DW_TAG_pointer_type:
8077 case DW_TAG_ptr_to_member_type:
8078 case DW_TAG_reference_type:
8079 case DW_TAG_string_type:
8082 case DW_TAG_base_type:
8083 case DW_TAG_subrange_type:
8084 case DW_TAG_typedef:
8085 /* Add a typedef symbol for the type definition, if it has a
8087 new_symbol (die, read_type_die (die, cu), cu);
8089 case DW_TAG_common_block:
8090 read_common_block (die, cu);
8092 case DW_TAG_common_inclusion:
8094 case DW_TAG_namespace:
8095 cu->processing_has_namespace_info = 1;
8096 read_namespace (die, cu);
8099 cu->processing_has_namespace_info = 1;
8100 read_module (die, cu);
8102 case DW_TAG_imported_declaration:
8103 cu->processing_has_namespace_info = 1;
8104 if (read_namespace_alias (die, cu))
8106 /* The declaration is not a global namespace alias: fall through. */
8107 case DW_TAG_imported_module:
8108 cu->processing_has_namespace_info = 1;
8109 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
8110 || cu->language != language_fortran))
8111 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
8112 dwarf_tag_name (die->tag));
8113 read_import_statement (die, cu);
8116 case DW_TAG_imported_unit:
8117 process_imported_unit_die (die, cu);
8121 new_symbol (die, NULL, cu);
8125 do_cleanups (in_process);
8128 /* DWARF name computation. */
8130 /* A helper function for dwarf2_compute_name which determines whether DIE
8131 needs to have the name of the scope prepended to the name listed in the
8135 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
8137 struct attribute *attr;
8141 case DW_TAG_namespace:
8142 case DW_TAG_typedef:
8143 case DW_TAG_class_type:
8144 case DW_TAG_interface_type:
8145 case DW_TAG_structure_type:
8146 case DW_TAG_union_type:
8147 case DW_TAG_enumeration_type:
8148 case DW_TAG_enumerator:
8149 case DW_TAG_subprogram:
8151 case DW_TAG_imported_declaration:
8154 case DW_TAG_variable:
8155 case DW_TAG_constant:
8156 /* We only need to prefix "globally" visible variables. These include
8157 any variable marked with DW_AT_external or any variable that
8158 lives in a namespace. [Variables in anonymous namespaces
8159 require prefixing, but they are not DW_AT_external.] */
8161 if (dwarf2_attr (die, DW_AT_specification, cu))
8163 struct dwarf2_cu *spec_cu = cu;
8165 return die_needs_namespace (die_specification (die, &spec_cu),
8169 attr = dwarf2_attr (die, DW_AT_external, cu);
8170 if (attr == NULL && die->parent->tag != DW_TAG_namespace
8171 && die->parent->tag != DW_TAG_module)
8173 /* A variable in a lexical block of some kind does not need a
8174 namespace, even though in C++ such variables may be external
8175 and have a mangled name. */
8176 if (die->parent->tag == DW_TAG_lexical_block
8177 || die->parent->tag == DW_TAG_try_block
8178 || die->parent->tag == DW_TAG_catch_block
8179 || die->parent->tag == DW_TAG_subprogram)
8188 /* Retrieve the last character from a mem_file. */
8191 do_ui_file_peek_last (void *object, const char *buffer, long length)
8193 char *last_char_p = (char *) object;
8196 *last_char_p = buffer[length - 1];
8199 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8200 compute the physname for the object, which include a method's:
8201 - formal parameters (C++/Java),
8202 - receiver type (Go),
8203 - return type (Java).
8205 The term "physname" is a bit confusing.
8206 For C++, for example, it is the demangled name.
8207 For Go, for example, it's the mangled name.
8209 For Ada, return the DIE's linkage name rather than the fully qualified
8210 name. PHYSNAME is ignored..
8212 The result is allocated on the objfile_obstack and canonicalized. */
8215 dwarf2_compute_name (const char *name,
8216 struct die_info *die, struct dwarf2_cu *cu,
8219 struct objfile *objfile = cu->objfile;
8222 name = dwarf2_name (die, cu);
8224 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8225 compute it by typename_concat inside GDB. */
8226 if (cu->language == language_ada
8227 || (cu->language == language_fortran && physname))
8229 /* For Ada unit, we prefer the linkage name over the name, as
8230 the former contains the exported name, which the user expects
8231 to be able to reference. Ideally, we want the user to be able
8232 to reference this entity using either natural or linkage name,
8233 but we haven't started looking at this enhancement yet. */
8234 struct attribute *attr;
8236 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
8238 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
8239 if (attr && DW_STRING (attr))
8240 return DW_STRING (attr);
8243 /* These are the only languages we know how to qualify names in. */
8245 && (cu->language == language_cplus || cu->language == language_java
8246 || cu->language == language_fortran))
8248 if (die_needs_namespace (die, cu))
8252 struct ui_file *buf;
8254 prefix = determine_prefix (die, cu);
8255 buf = mem_fileopen ();
8256 if (*prefix != '\0')
8258 char *prefixed_name = typename_concat (NULL, prefix, name,
8261 fputs_unfiltered (prefixed_name, buf);
8262 xfree (prefixed_name);
8265 fputs_unfiltered (name, buf);
8267 /* Template parameters may be specified in the DIE's DW_AT_name, or
8268 as children with DW_TAG_template_type_param or
8269 DW_TAG_value_type_param. If the latter, add them to the name
8270 here. If the name already has template parameters, then
8271 skip this step; some versions of GCC emit both, and
8272 it is more efficient to use the pre-computed name.
8274 Something to keep in mind about this process: it is very
8275 unlikely, or in some cases downright impossible, to produce
8276 something that will match the mangled name of a function.
8277 If the definition of the function has the same debug info,
8278 we should be able to match up with it anyway. But fallbacks
8279 using the minimal symbol, for instance to find a method
8280 implemented in a stripped copy of libstdc++, will not work.
8281 If we do not have debug info for the definition, we will have to
8282 match them up some other way.
8284 When we do name matching there is a related problem with function
8285 templates; two instantiated function templates are allowed to
8286 differ only by their return types, which we do not add here. */
8288 if (cu->language == language_cplus && strchr (name, '<') == NULL)
8290 struct attribute *attr;
8291 struct die_info *child;
8294 die->building_fullname = 1;
8296 for (child = die->child; child != NULL; child = child->sibling)
8300 const gdb_byte *bytes;
8301 struct dwarf2_locexpr_baton *baton;
8304 if (child->tag != DW_TAG_template_type_param
8305 && child->tag != DW_TAG_template_value_param)
8310 fputs_unfiltered ("<", buf);
8314 fputs_unfiltered (", ", buf);
8316 attr = dwarf2_attr (child, DW_AT_type, cu);
8319 complaint (&symfile_complaints,
8320 _("template parameter missing DW_AT_type"));
8321 fputs_unfiltered ("UNKNOWN_TYPE", buf);
8324 type = die_type (child, cu);
8326 if (child->tag == DW_TAG_template_type_param)
8328 c_print_type (type, "", buf, -1, 0, &type_print_raw_options);
8332 attr = dwarf2_attr (child, DW_AT_const_value, cu);
8335 complaint (&symfile_complaints,
8336 _("template parameter missing "
8337 "DW_AT_const_value"));
8338 fputs_unfiltered ("UNKNOWN_VALUE", buf);
8342 dwarf2_const_value_attr (attr, type, name,
8343 &cu->comp_unit_obstack, cu,
8344 &value, &bytes, &baton);
8346 if (TYPE_NOSIGN (type))
8347 /* GDB prints characters as NUMBER 'CHAR'. If that's
8348 changed, this can use value_print instead. */
8349 c_printchar (value, type, buf);
8352 struct value_print_options opts;
8355 v = dwarf2_evaluate_loc_desc (type, NULL,
8359 else if (bytes != NULL)
8361 v = allocate_value (type);
8362 memcpy (value_contents_writeable (v), bytes,
8363 TYPE_LENGTH (type));
8366 v = value_from_longest (type, value);
8368 /* Specify decimal so that we do not depend on
8370 get_formatted_print_options (&opts, 'd');
8372 value_print (v, buf, &opts);
8378 die->building_fullname = 0;
8382 /* Close the argument list, with a space if necessary
8383 (nested templates). */
8384 char last_char = '\0';
8385 ui_file_put (buf, do_ui_file_peek_last, &last_char);
8386 if (last_char == '>')
8387 fputs_unfiltered (" >", buf);
8389 fputs_unfiltered (">", buf);
8393 /* For Java and C++ methods, append formal parameter type
8394 information, if PHYSNAME. */
8396 if (physname && die->tag == DW_TAG_subprogram
8397 && (cu->language == language_cplus
8398 || cu->language == language_java))
8400 struct type *type = read_type_die (die, cu);
8402 c_type_print_args (type, buf, 1, cu->language,
8403 &type_print_raw_options);
8405 if (cu->language == language_java)
8407 /* For java, we must append the return type to method
8409 if (die->tag == DW_TAG_subprogram)
8410 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
8411 0, 0, &type_print_raw_options);
8413 else if (cu->language == language_cplus)
8415 /* Assume that an artificial first parameter is
8416 "this", but do not crash if it is not. RealView
8417 marks unnamed (and thus unused) parameters as
8418 artificial; there is no way to differentiate
8420 if (TYPE_NFIELDS (type) > 0
8421 && TYPE_FIELD_ARTIFICIAL (type, 0)
8422 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
8423 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type,
8425 fputs_unfiltered (" const", buf);
8429 name = ui_file_obsavestring (buf, &objfile->objfile_obstack,
8431 ui_file_delete (buf);
8433 if (cu->language == language_cplus)
8436 = dwarf2_canonicalize_name (name, cu,
8437 &objfile->objfile_obstack);
8448 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8449 If scope qualifiers are appropriate they will be added. The result
8450 will be allocated on the objfile_obstack, or NULL if the DIE does
8451 not have a name. NAME may either be from a previous call to
8452 dwarf2_name or NULL.
8454 The output string will be canonicalized (if C++/Java). */
8457 dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu)
8459 return dwarf2_compute_name (name, die, cu, 0);
8462 /* Construct a physname for the given DIE in CU. NAME may either be
8463 from a previous call to dwarf2_name or NULL. The result will be
8464 allocated on the objfile_objstack or NULL if the DIE does not have a
8467 The output string will be canonicalized (if C++/Java). */
8470 dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu)
8472 struct objfile *objfile = cu->objfile;
8473 struct attribute *attr;
8474 const char *retval, *mangled = NULL, *canon = NULL;
8475 struct cleanup *back_to;
8478 /* In this case dwarf2_compute_name is just a shortcut not building anything
8480 if (!die_needs_namespace (die, cu))
8481 return dwarf2_compute_name (name, die, cu, 1);
8483 back_to = make_cleanup (null_cleanup, NULL);
8485 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
8487 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
8489 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8491 if (attr && DW_STRING (attr))
8495 mangled = DW_STRING (attr);
8497 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8498 type. It is easier for GDB users to search for such functions as
8499 `name(params)' than `long name(params)'. In such case the minimal
8500 symbol names do not match the full symbol names but for template
8501 functions there is never a need to look up their definition from their
8502 declaration so the only disadvantage remains the minimal symbol
8503 variant `long name(params)' does not have the proper inferior type.
8506 if (cu->language == language_go)
8508 /* This is a lie, but we already lie to the caller new_symbol_full.
8509 new_symbol_full assumes we return the mangled name.
8510 This just undoes that lie until things are cleaned up. */
8515 demangled = gdb_demangle (mangled,
8516 (DMGL_PARAMS | DMGL_ANSI
8517 | (cu->language == language_java
8518 ? DMGL_JAVA | DMGL_RET_POSTFIX
8523 make_cleanup (xfree, demangled);
8533 if (canon == NULL || check_physname)
8535 const char *physname = dwarf2_compute_name (name, die, cu, 1);
8537 if (canon != NULL && strcmp (physname, canon) != 0)
8539 /* It may not mean a bug in GDB. The compiler could also
8540 compute DW_AT_linkage_name incorrectly. But in such case
8541 GDB would need to be bug-to-bug compatible. */
8543 complaint (&symfile_complaints,
8544 _("Computed physname <%s> does not match demangled <%s> "
8545 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8546 physname, canon, mangled, die->offset.sect_off,
8547 objfile_name (objfile));
8549 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8550 is available here - over computed PHYSNAME. It is safer
8551 against both buggy GDB and buggy compilers. */
8565 retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval));
8567 do_cleanups (back_to);
8571 /* Inspect DIE in CU for a namespace alias. If one exists, record
8572 a new symbol for it.
8574 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8577 read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu)
8579 struct attribute *attr;
8581 /* If the die does not have a name, this is not a namespace
8583 attr = dwarf2_attr (die, DW_AT_name, cu);
8587 struct die_info *d = die;
8588 struct dwarf2_cu *imported_cu = cu;
8590 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8591 keep inspecting DIEs until we hit the underlying import. */
8592 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8593 for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num)
8595 attr = dwarf2_attr (d, DW_AT_import, cu);
8599 d = follow_die_ref (d, attr, &imported_cu);
8600 if (d->tag != DW_TAG_imported_declaration)
8604 if (num == MAX_NESTED_IMPORTED_DECLARATIONS)
8606 complaint (&symfile_complaints,
8607 _("DIE at 0x%x has too many recursively imported "
8608 "declarations"), d->offset.sect_off);
8615 sect_offset offset = dwarf2_get_ref_die_offset (attr);
8617 type = get_die_type_at_offset (offset, cu->per_cu);
8618 if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
8620 /* This declaration is a global namespace alias. Add
8621 a symbol for it whose type is the aliased namespace. */
8622 new_symbol (die, type, cu);
8631 /* Read the import statement specified by the given die and record it. */
8634 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
8636 struct objfile *objfile = cu->objfile;
8637 struct attribute *import_attr;
8638 struct die_info *imported_die, *child_die;
8639 struct dwarf2_cu *imported_cu;
8640 const char *imported_name;
8641 const char *imported_name_prefix;
8642 const char *canonical_name;
8643 const char *import_alias;
8644 const char *imported_declaration = NULL;
8645 const char *import_prefix;
8646 VEC (const_char_ptr) *excludes = NULL;
8647 struct cleanup *cleanups;
8649 import_attr = dwarf2_attr (die, DW_AT_import, cu);
8650 if (import_attr == NULL)
8652 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
8653 dwarf_tag_name (die->tag));
8658 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
8659 imported_name = dwarf2_name (imported_die, imported_cu);
8660 if (imported_name == NULL)
8662 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8664 The import in the following code:
8678 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8679 <52> DW_AT_decl_file : 1
8680 <53> DW_AT_decl_line : 6
8681 <54> DW_AT_import : <0x75>
8682 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8684 <5b> DW_AT_decl_file : 1
8685 <5c> DW_AT_decl_line : 2
8686 <5d> DW_AT_type : <0x6e>
8688 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8689 <76> DW_AT_byte_size : 4
8690 <77> DW_AT_encoding : 5 (signed)
8692 imports the wrong die ( 0x75 instead of 0x58 ).
8693 This case will be ignored until the gcc bug is fixed. */
8697 /* Figure out the local name after import. */
8698 import_alias = dwarf2_name (die, cu);
8700 /* Figure out where the statement is being imported to. */
8701 import_prefix = determine_prefix (die, cu);
8703 /* Figure out what the scope of the imported die is and prepend it
8704 to the name of the imported die. */
8705 imported_name_prefix = determine_prefix (imported_die, imported_cu);
8707 if (imported_die->tag != DW_TAG_namespace
8708 && imported_die->tag != DW_TAG_module)
8710 imported_declaration = imported_name;
8711 canonical_name = imported_name_prefix;
8713 else if (strlen (imported_name_prefix) > 0)
8714 canonical_name = obconcat (&objfile->objfile_obstack,
8715 imported_name_prefix, "::", imported_name,
8718 canonical_name = imported_name;
8720 cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes);
8722 if (die->tag == DW_TAG_imported_module && cu->language == language_fortran)
8723 for (child_die = die->child; child_die && child_die->tag;
8724 child_die = sibling_die (child_die))
8726 /* DWARF-4: A Fortran use statement with a “rename list” may be
8727 represented by an imported module entry with an import attribute
8728 referring to the module and owned entries corresponding to those
8729 entities that are renamed as part of being imported. */
8731 if (child_die->tag != DW_TAG_imported_declaration)
8733 complaint (&symfile_complaints,
8734 _("child DW_TAG_imported_declaration expected "
8735 "- DIE at 0x%x [in module %s]"),
8736 child_die->offset.sect_off, objfile_name (objfile));
8740 import_attr = dwarf2_attr (child_die, DW_AT_import, cu);
8741 if (import_attr == NULL)
8743 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
8744 dwarf_tag_name (child_die->tag));
8749 imported_die = follow_die_ref_or_sig (child_die, import_attr,
8751 imported_name = dwarf2_name (imported_die, imported_cu);
8752 if (imported_name == NULL)
8754 complaint (&symfile_complaints,
8755 _("child DW_TAG_imported_declaration has unknown "
8756 "imported name - DIE at 0x%x [in module %s]"),
8757 child_die->offset.sect_off, objfile_name (objfile));
8761 VEC_safe_push (const_char_ptr, excludes, imported_name);
8763 process_die (child_die, cu);
8766 cp_add_using_directive (import_prefix,
8769 imported_declaration,
8772 &objfile->objfile_obstack);
8774 do_cleanups (cleanups);
8777 /* Cleanup function for handle_DW_AT_stmt_list. */
8780 free_cu_line_header (void *arg)
8782 struct dwarf2_cu *cu = arg;
8784 free_line_header (cu->line_header);
8785 cu->line_header = NULL;
8788 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8789 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8790 this, it was first present in GCC release 4.3.0. */
8793 producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu)
8795 if (!cu->checked_producer)
8796 check_producer (cu);
8798 return cu->producer_is_gcc_lt_4_3;
8802 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
8803 const char **name, const char **comp_dir)
8805 struct attribute *attr;
8810 /* Find the filename. Do not use dwarf2_name here, since the filename
8811 is not a source language identifier. */
8812 attr = dwarf2_attr (die, DW_AT_name, cu);
8815 *name = DW_STRING (attr);
8818 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
8820 *comp_dir = DW_STRING (attr);
8821 else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL
8822 && IS_ABSOLUTE_PATH (*name))
8824 char *d = ldirname (*name);
8828 make_cleanup (xfree, d);
8830 if (*comp_dir != NULL)
8832 /* Irix 6.2 native cc prepends <machine>.: to the compilation
8833 directory, get rid of it. */
8834 char *cp = strchr (*comp_dir, ':');
8836 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
8841 *name = "<unknown>";
8844 /* Handle DW_AT_stmt_list for a compilation unit.
8845 DIE is the DW_TAG_compile_unit die for CU.
8846 COMP_DIR is the compilation directory.
8847 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
8850 handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu,
8851 const char *comp_dir) /* ARI: editCase function */
8853 struct attribute *attr;
8855 gdb_assert (! cu->per_cu->is_debug_types);
8857 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
8860 unsigned int line_offset = DW_UNSND (attr);
8861 struct line_header *line_header
8862 = dwarf_decode_line_header (line_offset, cu);
8866 cu->line_header = line_header;
8867 make_cleanup (free_cu_line_header, cu);
8868 dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1);
8873 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
8876 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
8878 struct objfile *objfile = dwarf2_per_objfile->objfile;
8879 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
8880 CORE_ADDR lowpc = ((CORE_ADDR) -1);
8881 CORE_ADDR highpc = ((CORE_ADDR) 0);
8882 struct attribute *attr;
8883 const char *name = NULL;
8884 const char *comp_dir = NULL;
8885 struct die_info *child_die;
8886 bfd *abfd = objfile->obfd;
8889 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8891 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
8893 /* If we didn't find a lowpc, set it to highpc to avoid complaints
8894 from finish_block. */
8895 if (lowpc == ((CORE_ADDR) -1))
8900 find_file_and_directory (die, cu, &name, &comp_dir);
8902 prepare_one_comp_unit (cu, die, cu->language);
8904 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
8905 standardised yet. As a workaround for the language detection we fall
8906 back to the DW_AT_producer string. */
8907 if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
8908 cu->language = language_opencl;
8910 /* Similar hack for Go. */
8911 if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL)
8912 set_cu_language (DW_LANG_Go, cu);
8914 dwarf2_start_symtab (cu, name, comp_dir, lowpc);
8916 /* Decode line number information if present. We do this before
8917 processing child DIEs, so that the line header table is available
8918 for DW_AT_decl_file. */
8919 handle_DW_AT_stmt_list (die, cu, comp_dir);
8921 /* Process all dies in compilation unit. */
8922 if (die->child != NULL)
8924 child_die = die->child;
8925 while (child_die && child_die->tag)
8927 process_die (child_die, cu);
8928 child_die = sibling_die (child_die);
8932 /* Decode macro information, if present. Dwarf 2 macro information
8933 refers to information in the line number info statement program
8934 header, so we can only read it if we've read the header
8936 attr = dwarf2_attr (die, DW_AT_GNU_macros, cu);
8937 if (attr && cu->line_header)
8939 if (dwarf2_attr (die, DW_AT_macro_info, cu))
8940 complaint (&symfile_complaints,
8941 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8943 dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1);
8947 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
8948 if (attr && cu->line_header)
8950 unsigned int macro_offset = DW_UNSND (attr);
8952 dwarf_decode_macros (cu, macro_offset, comp_dir, 0);
8956 do_cleanups (back_to);
8959 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8960 Create the set of symtabs used by this TU, or if this TU is sharing
8961 symtabs with another TU and the symtabs have already been created
8962 then restore those symtabs in the line header.
8963 We don't need the pc/line-number mapping for type units. */
8966 setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
8968 struct objfile *objfile = dwarf2_per_objfile->objfile;
8969 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
8970 struct type_unit_group *tu_group;
8972 struct line_header *lh;
8973 struct attribute *attr;
8974 unsigned int i, line_offset;
8975 struct signatured_type *sig_type;
8977 gdb_assert (per_cu->is_debug_types);
8978 sig_type = (struct signatured_type *) per_cu;
8980 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
8982 /* If we're using .gdb_index (includes -readnow) then
8983 per_cu->type_unit_group may not have been set up yet. */
8984 if (sig_type->type_unit_group == NULL)
8985 sig_type->type_unit_group = get_type_unit_group (cu, attr);
8986 tu_group = sig_type->type_unit_group;
8988 /* If we've already processed this stmt_list there's no real need to
8989 do it again, we could fake it and just recreate the part we need
8990 (file name,index -> symtab mapping). If data shows this optimization
8991 is useful we can do it then. */
8992 first_time = tu_group->primary_symtab == NULL;
8994 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8999 line_offset = DW_UNSND (attr);
9000 lh = dwarf_decode_line_header (line_offset, cu);
9005 dwarf2_start_symtab (cu, "", NULL, 0);
9008 gdb_assert (tu_group->symtabs == NULL);
9011 /* Note: The primary symtab will get allocated at the end. */
9015 cu->line_header = lh;
9016 make_cleanup (free_cu_line_header, cu);
9020 dwarf2_start_symtab (cu, "", NULL, 0);
9022 tu_group->num_symtabs = lh->num_file_names;
9023 tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names);
9025 for (i = 0; i < lh->num_file_names; ++i)
9027 const char *dir = NULL;
9028 struct file_entry *fe = &lh->file_names[i];
9031 dir = lh->include_dirs[fe->dir_index - 1];
9032 dwarf2_start_subfile (fe->name, dir, NULL);
9034 /* Note: We don't have to watch for the main subfile here, type units
9035 don't have DW_AT_name. */
9037 if (current_subfile->symtab == NULL)
9039 /* NOTE: start_subfile will recognize when it's been passed
9040 a file it has already seen. So we can't assume there's a
9041 simple mapping from lh->file_names to subfiles,
9042 lh->file_names may contain dups. */
9043 current_subfile->symtab = allocate_symtab (current_subfile->name,
9047 fe->symtab = current_subfile->symtab;
9048 tu_group->symtabs[i] = fe->symtab;
9055 for (i = 0; i < lh->num_file_names; ++i)
9057 struct file_entry *fe = &lh->file_names[i];
9059 fe->symtab = tu_group->symtabs[i];
9063 /* The main symtab is allocated last. Type units don't have DW_AT_name
9064 so they don't have a "real" (so to speak) symtab anyway.
9065 There is later code that will assign the main symtab to all symbols
9066 that don't have one. We need to handle the case of a symbol with a
9067 missing symtab (DW_AT_decl_file) anyway. */
9070 /* Process DW_TAG_type_unit.
9071 For TUs we want to skip the first top level sibling if it's not the
9072 actual type being defined by this TU. In this case the first top
9073 level sibling is there to provide context only. */
9076 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
9078 struct die_info *child_die;
9080 prepare_one_comp_unit (cu, die, language_minimal);
9082 /* Initialize (or reinitialize) the machinery for building symtabs.
9083 We do this before processing child DIEs, so that the line header table
9084 is available for DW_AT_decl_file. */
9085 setup_type_unit_groups (die, cu);
9087 if (die->child != NULL)
9089 child_die = die->child;
9090 while (child_die && child_die->tag)
9092 process_die (child_die, cu);
9093 child_die = sibling_die (child_die);
9100 http://gcc.gnu.org/wiki/DebugFission
9101 http://gcc.gnu.org/wiki/DebugFissionDWP
9103 To simplify handling of both DWO files ("object" files with the DWARF info)
9104 and DWP files (a file with the DWOs packaged up into one file), we treat
9105 DWP files as having a collection of virtual DWO files. */
9108 hash_dwo_file (const void *item)
9110 const struct dwo_file *dwo_file = item;
9113 hash = htab_hash_string (dwo_file->dwo_name);
9114 if (dwo_file->comp_dir != NULL)
9115 hash += htab_hash_string (dwo_file->comp_dir);
9120 eq_dwo_file (const void *item_lhs, const void *item_rhs)
9122 const struct dwo_file *lhs = item_lhs;
9123 const struct dwo_file *rhs = item_rhs;
9125 if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0)
9127 if (lhs->comp_dir == NULL || rhs->comp_dir == NULL)
9128 return lhs->comp_dir == rhs->comp_dir;
9129 return strcmp (lhs->comp_dir, rhs->comp_dir) == 0;
9132 /* Allocate a hash table for DWO files. */
9135 allocate_dwo_file_hash_table (void)
9137 struct objfile *objfile = dwarf2_per_objfile->objfile;
9139 return htab_create_alloc_ex (41,
9143 &objfile->objfile_obstack,
9144 hashtab_obstack_allocate,
9145 dummy_obstack_deallocate);
9148 /* Lookup DWO file DWO_NAME. */
9151 lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir)
9153 struct dwo_file find_entry;
9156 if (dwarf2_per_objfile->dwo_files == NULL)
9157 dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table ();
9159 memset (&find_entry, 0, sizeof (find_entry));
9160 find_entry.dwo_name = dwo_name;
9161 find_entry.comp_dir = comp_dir;
9162 slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT);
9168 hash_dwo_unit (const void *item)
9170 const struct dwo_unit *dwo_unit = item;
9172 /* This drops the top 32 bits of the id, but is ok for a hash. */
9173 return dwo_unit->signature;
9177 eq_dwo_unit (const void *item_lhs, const void *item_rhs)
9179 const struct dwo_unit *lhs = item_lhs;
9180 const struct dwo_unit *rhs = item_rhs;
9182 /* The signature is assumed to be unique within the DWO file.
9183 So while object file CU dwo_id's always have the value zero,
9184 that's OK, assuming each object file DWO file has only one CU,
9185 and that's the rule for now. */
9186 return lhs->signature == rhs->signature;
9189 /* Allocate a hash table for DWO CUs,TUs.
9190 There is one of these tables for each of CUs,TUs for each DWO file. */
9193 allocate_dwo_unit_table (struct objfile *objfile)
9195 /* Start out with a pretty small number.
9196 Generally DWO files contain only one CU and maybe some TUs. */
9197 return htab_create_alloc_ex (3,
9201 &objfile->objfile_obstack,
9202 hashtab_obstack_allocate,
9203 dummy_obstack_deallocate);
9206 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9208 struct create_dwo_cu_data
9210 struct dwo_file *dwo_file;
9211 struct dwo_unit dwo_unit;
9214 /* die_reader_func for create_dwo_cu. */
9217 create_dwo_cu_reader (const struct die_reader_specs *reader,
9218 const gdb_byte *info_ptr,
9219 struct die_info *comp_unit_die,
9223 struct dwarf2_cu *cu = reader->cu;
9224 struct objfile *objfile = dwarf2_per_objfile->objfile;
9225 sect_offset offset = cu->per_cu->offset;
9226 struct dwarf2_section_info *section = cu->per_cu->section;
9227 struct create_dwo_cu_data *data = datap;
9228 struct dwo_file *dwo_file = data->dwo_file;
9229 struct dwo_unit *dwo_unit = &data->dwo_unit;
9230 struct attribute *attr;
9232 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
9235 complaint (&symfile_complaints,
9236 _("Dwarf Error: debug entry at offset 0x%x is missing"
9237 " its dwo_id [in module %s]"),
9238 offset.sect_off, dwo_file->dwo_name);
9242 dwo_unit->dwo_file = dwo_file;
9243 dwo_unit->signature = DW_UNSND (attr);
9244 dwo_unit->section = section;
9245 dwo_unit->offset = offset;
9246 dwo_unit->length = cu->per_cu->length;
9248 if (dwarf2_read_debug)
9249 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n",
9250 offset.sect_off, hex_string (dwo_unit->signature));
9253 /* Create the dwo_unit for the lone CU in DWO_FILE.
9254 Note: This function processes DWO files only, not DWP files. */
9256 static struct dwo_unit *
9257 create_dwo_cu (struct dwo_file *dwo_file)
9259 struct objfile *objfile = dwarf2_per_objfile->objfile;
9260 struct dwarf2_section_info *section = &dwo_file->sections.info;
9263 const gdb_byte *info_ptr, *end_ptr;
9264 struct create_dwo_cu_data create_dwo_cu_data;
9265 struct dwo_unit *dwo_unit;
9267 dwarf2_read_section (objfile, section);
9268 info_ptr = section->buffer;
9270 if (info_ptr == NULL)
9273 /* We can't set abfd until now because the section may be empty or
9274 not present, in which case section->asection will be NULL. */
9275 abfd = get_section_bfd_owner (section);
9277 if (dwarf2_read_debug)
9279 fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n",
9280 get_section_name (section),
9281 get_section_file_name (section));
9284 create_dwo_cu_data.dwo_file = dwo_file;
9287 end_ptr = info_ptr + section->size;
9288 while (info_ptr < end_ptr)
9290 struct dwarf2_per_cu_data per_cu;
9292 memset (&create_dwo_cu_data.dwo_unit, 0,
9293 sizeof (create_dwo_cu_data.dwo_unit));
9294 memset (&per_cu, 0, sizeof (per_cu));
9295 per_cu.objfile = objfile;
9296 per_cu.is_debug_types = 0;
9297 per_cu.offset.sect_off = info_ptr - section->buffer;
9298 per_cu.section = section;
9300 init_cutu_and_read_dies_no_follow (&per_cu,
9301 &dwo_file->sections.abbrev,
9303 create_dwo_cu_reader,
9304 &create_dwo_cu_data);
9306 if (create_dwo_cu_data.dwo_unit.dwo_file != NULL)
9308 /* If we've already found one, complain. We only support one
9309 because having more than one requires hacking the dwo_name of
9310 each to match, which is highly unlikely to happen. */
9311 if (dwo_unit != NULL)
9313 complaint (&symfile_complaints,
9314 _("Multiple CUs in DWO file %s [in module %s]"),
9315 dwo_file->dwo_name, objfile_name (objfile));
9319 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
9320 *dwo_unit = create_dwo_cu_data.dwo_unit;
9323 info_ptr += per_cu.length;
9329 /* DWP file .debug_{cu,tu}_index section format:
9330 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9334 Both index sections have the same format, and serve to map a 64-bit
9335 signature to a set of section numbers. Each section begins with a header,
9336 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9337 indexes, and a pool of 32-bit section numbers. The index sections will be
9338 aligned at 8-byte boundaries in the file.
9340 The index section header consists of:
9342 V, 32 bit version number
9344 N, 32 bit number of compilation units or type units in the index
9345 M, 32 bit number of slots in the hash table
9347 Numbers are recorded using the byte order of the application binary.
9349 The hash table begins at offset 16 in the section, and consists of an array
9350 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9351 order of the application binary). Unused slots in the hash table are 0.
9352 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9354 The parallel table begins immediately after the hash table
9355 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9356 array of 32-bit indexes (using the byte order of the application binary),
9357 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9358 table contains a 32-bit index into the pool of section numbers. For unused
9359 hash table slots, the corresponding entry in the parallel table will be 0.
9361 The pool of section numbers begins immediately following the hash table
9362 (at offset 16 + 12 * M from the beginning of the section). The pool of
9363 section numbers consists of an array of 32-bit words (using the byte order
9364 of the application binary). Each item in the array is indexed starting
9365 from 0. The hash table entry provides the index of the first section
9366 number in the set. Additional section numbers in the set follow, and the
9367 set is terminated by a 0 entry (section number 0 is not used in ELF).
9369 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9370 section must be the first entry in the set, and the .debug_abbrev.dwo must
9371 be the second entry. Other members of the set may follow in any order.
9377 DWP Version 2 combines all the .debug_info, etc. sections into one,
9378 and the entries in the index tables are now offsets into these sections.
9379 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9382 Index Section Contents:
9384 Hash Table of Signatures dwp_hash_table.hash_table
9385 Parallel Table of Indices dwp_hash_table.unit_table
9386 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9387 Table of Section Sizes dwp_hash_table.v2.sizes
9389 The index section header consists of:
9391 V, 32 bit version number
9392 L, 32 bit number of columns in the table of section offsets
9393 N, 32 bit number of compilation units or type units in the index
9394 M, 32 bit number of slots in the hash table
9396 Numbers are recorded using the byte order of the application binary.
9398 The hash table has the same format as version 1.
9399 The parallel table of indices has the same format as version 1,
9400 except that the entries are origin-1 indices into the table of sections
9401 offsets and the table of section sizes.
9403 The table of offsets begins immediately following the parallel table
9404 (at offset 16 + 12 * M from the beginning of the section). The table is
9405 a two-dimensional array of 32-bit words (using the byte order of the
9406 application binary), with L columns and N+1 rows, in row-major order.
9407 Each row in the array is indexed starting from 0. The first row provides
9408 a key to the remaining rows: each column in this row provides an identifier
9409 for a debug section, and the offsets in the same column of subsequent rows
9410 refer to that section. The section identifiers are:
9412 DW_SECT_INFO 1 .debug_info.dwo
9413 DW_SECT_TYPES 2 .debug_types.dwo
9414 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9415 DW_SECT_LINE 4 .debug_line.dwo
9416 DW_SECT_LOC 5 .debug_loc.dwo
9417 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9418 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9419 DW_SECT_MACRO 8 .debug_macro.dwo
9421 The offsets provided by the CU and TU index sections are the base offsets
9422 for the contributions made by each CU or TU to the corresponding section
9423 in the package file. Each CU and TU header contains an abbrev_offset
9424 field, used to find the abbreviations table for that CU or TU within the
9425 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9426 be interpreted as relative to the base offset given in the index section.
9427 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9428 should be interpreted as relative to the base offset for .debug_line.dwo,
9429 and offsets into other debug sections obtained from DWARF attributes should
9430 also be interpreted as relative to the corresponding base offset.
9432 The table of sizes begins immediately following the table of offsets.
9433 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9434 with L columns and N rows, in row-major order. Each row in the array is
9435 indexed starting from 1 (row 0 is shared by the two tables).
9439 Hash table lookup is handled the same in version 1 and 2:
9441 We assume that N and M will not exceed 2^32 - 1.
9442 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9444 Given a 64-bit compilation unit signature or a type signature S, an entry
9445 in the hash table is located as follows:
9447 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9448 the low-order k bits all set to 1.
9450 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9452 3) If the hash table entry at index H matches the signature, use that
9453 entry. If the hash table entry at index H is unused (all zeroes),
9454 terminate the search: the signature is not present in the table.
9456 4) Let H = (H + H') modulo M. Repeat at Step 3.
9458 Because M > N and H' and M are relatively prime, the search is guaranteed
9459 to stop at an unused slot or find the match. */
9461 /* Create a hash table to map DWO IDs to their CU/TU entry in
9462 .debug_{info,types}.dwo in DWP_FILE.
9463 Returns NULL if there isn't one.
9464 Note: This function processes DWP files only, not DWO files. */
9466 static struct dwp_hash_table *
9467 create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types)
9469 struct objfile *objfile = dwarf2_per_objfile->objfile;
9470 bfd *dbfd = dwp_file->dbfd;
9471 const gdb_byte *index_ptr, *index_end;
9472 struct dwarf2_section_info *index;
9473 uint32_t version, nr_columns, nr_units, nr_slots;
9474 struct dwp_hash_table *htab;
9477 index = &dwp_file->sections.tu_index;
9479 index = &dwp_file->sections.cu_index;
9481 if (dwarf2_section_empty_p (index))
9483 dwarf2_read_section (objfile, index);
9485 index_ptr = index->buffer;
9486 index_end = index_ptr + index->size;
9488 version = read_4_bytes (dbfd, index_ptr);
9491 nr_columns = read_4_bytes (dbfd, index_ptr);
9495 nr_units = read_4_bytes (dbfd, index_ptr);
9497 nr_slots = read_4_bytes (dbfd, index_ptr);
9500 if (version != 1 && version != 2)
9502 error (_("Dwarf Error: unsupported DWP file version (%s)"
9504 pulongest (version), dwp_file->name);
9506 if (nr_slots != (nr_slots & -nr_slots))
9508 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9509 " is not power of 2 [in module %s]"),
9510 pulongest (nr_slots), dwp_file->name);
9513 htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table);
9514 htab->version = version;
9515 htab->nr_columns = nr_columns;
9516 htab->nr_units = nr_units;
9517 htab->nr_slots = nr_slots;
9518 htab->hash_table = index_ptr;
9519 htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots;
9521 /* Exit early if the table is empty. */
9522 if (nr_slots == 0 || nr_units == 0
9523 || (version == 2 && nr_columns == 0))
9525 /* All must be zero. */
9526 if (nr_slots != 0 || nr_units != 0
9527 || (version == 2 && nr_columns != 0))
9529 complaint (&symfile_complaints,
9530 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9531 " all zero [in modules %s]"),
9539 htab->section_pool.v1.indices =
9540 htab->unit_table + sizeof (uint32_t) * nr_slots;
9541 /* It's harder to decide whether the section is too small in v1.
9542 V1 is deprecated anyway so we punt. */
9546 const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots;
9547 int *ids = htab->section_pool.v2.section_ids;
9548 /* Reverse map for error checking. */
9549 int ids_seen[DW_SECT_MAX + 1];
9554 error (_("Dwarf Error: bad DWP hash table, too few columns"
9555 " in section table [in module %s]"),
9558 if (nr_columns > MAX_NR_V2_DWO_SECTIONS)
9560 error (_("Dwarf Error: bad DWP hash table, too many columns"
9561 " in section table [in module %s]"),
9564 memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t));
9565 memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t));
9566 for (i = 0; i < nr_columns; ++i)
9568 int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t));
9570 if (id < DW_SECT_MIN || id > DW_SECT_MAX)
9572 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9573 " in section table [in module %s]"),
9574 id, dwp_file->name);
9576 if (ids_seen[id] != -1)
9578 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9579 " id %d in section table [in module %s]"),
9580 id, dwp_file->name);
9585 /* Must have exactly one info or types section. */
9586 if (((ids_seen[DW_SECT_INFO] != -1)
9587 + (ids_seen[DW_SECT_TYPES] != -1))
9590 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9591 " DWO info/types section [in module %s]"),
9594 /* Must have an abbrev section. */
9595 if (ids_seen[DW_SECT_ABBREV] == -1)
9597 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9598 " section [in module %s]"),
9601 htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns;
9602 htab->section_pool.v2.sizes =
9603 htab->section_pool.v2.offsets + (sizeof (uint32_t)
9604 * nr_units * nr_columns);
9605 if ((htab->section_pool.v2.sizes + (sizeof (uint32_t)
9606 * nr_units * nr_columns))
9609 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9618 /* Update SECTIONS with the data from SECTP.
9620 This function is like the other "locate" section routines that are
9621 passed to bfd_map_over_sections, but in this context the sections to
9622 read comes from the DWP V1 hash table, not the full ELF section table.
9624 The result is non-zero for success, or zero if an error was found. */
9627 locate_v1_virtual_dwo_sections (asection *sectp,
9628 struct virtual_v1_dwo_sections *sections)
9630 const struct dwop_section_names *names = &dwop_section_names;
9632 if (section_is_p (sectp->name, &names->abbrev_dwo))
9634 /* There can be only one. */
9635 if (sections->abbrev.s.asection != NULL)
9637 sections->abbrev.s.asection = sectp;
9638 sections->abbrev.size = bfd_get_section_size (sectp);
9640 else if (section_is_p (sectp->name, &names->info_dwo)
9641 || section_is_p (sectp->name, &names->types_dwo))
9643 /* There can be only one. */
9644 if (sections->info_or_types.s.asection != NULL)
9646 sections->info_or_types.s.asection = sectp;
9647 sections->info_or_types.size = bfd_get_section_size (sectp);
9649 else if (section_is_p (sectp->name, &names->line_dwo))
9651 /* There can be only one. */
9652 if (sections->line.s.asection != NULL)
9654 sections->line.s.asection = sectp;
9655 sections->line.size = bfd_get_section_size (sectp);
9657 else if (section_is_p (sectp->name, &names->loc_dwo))
9659 /* There can be only one. */
9660 if (sections->loc.s.asection != NULL)
9662 sections->loc.s.asection = sectp;
9663 sections->loc.size = bfd_get_section_size (sectp);
9665 else if (section_is_p (sectp->name, &names->macinfo_dwo))
9667 /* There can be only one. */
9668 if (sections->macinfo.s.asection != NULL)
9670 sections->macinfo.s.asection = sectp;
9671 sections->macinfo.size = bfd_get_section_size (sectp);
9673 else if (section_is_p (sectp->name, &names->macro_dwo))
9675 /* There can be only one. */
9676 if (sections->macro.s.asection != NULL)
9678 sections->macro.s.asection = sectp;
9679 sections->macro.size = bfd_get_section_size (sectp);
9681 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
9683 /* There can be only one. */
9684 if (sections->str_offsets.s.asection != NULL)
9686 sections->str_offsets.s.asection = sectp;
9687 sections->str_offsets.size = bfd_get_section_size (sectp);
9691 /* No other kind of section is valid. */
9698 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9699 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9700 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9701 This is for DWP version 1 files. */
9703 static struct dwo_unit *
9704 create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file,
9705 uint32_t unit_index,
9706 const char *comp_dir,
9707 ULONGEST signature, int is_debug_types)
9709 struct objfile *objfile = dwarf2_per_objfile->objfile;
9710 const struct dwp_hash_table *dwp_htab =
9711 is_debug_types ? dwp_file->tus : dwp_file->cus;
9712 bfd *dbfd = dwp_file->dbfd;
9713 const char *kind = is_debug_types ? "TU" : "CU";
9714 struct dwo_file *dwo_file;
9715 struct dwo_unit *dwo_unit;
9716 struct virtual_v1_dwo_sections sections;
9717 void **dwo_file_slot;
9718 char *virtual_dwo_name;
9719 struct dwarf2_section_info *cutu;
9720 struct cleanup *cleanups;
9723 gdb_assert (dwp_file->version == 1);
9725 if (dwarf2_read_debug)
9727 fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n",
9729 pulongest (unit_index), hex_string (signature),
9733 /* Fetch the sections of this DWO unit.
9734 Put a limit on the number of sections we look for so that bad data
9735 doesn't cause us to loop forever. */
9737 #define MAX_NR_V1_DWO_SECTIONS \
9738 (1 /* .debug_info or .debug_types */ \
9739 + 1 /* .debug_abbrev */ \
9740 + 1 /* .debug_line */ \
9741 + 1 /* .debug_loc */ \
9742 + 1 /* .debug_str_offsets */ \
9743 + 1 /* .debug_macro or .debug_macinfo */ \
9744 + 1 /* trailing zero */)
9746 memset (§ions, 0, sizeof (sections));
9747 cleanups = make_cleanup (null_cleanup, 0);
9749 for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i)
9752 uint32_t section_nr =
9754 dwp_htab->section_pool.v1.indices
9755 + (unit_index + i) * sizeof (uint32_t));
9757 if (section_nr == 0)
9759 if (section_nr >= dwp_file->num_sections)
9761 error (_("Dwarf Error: bad DWP hash table, section number too large"
9766 sectp = dwp_file->elf_sections[section_nr];
9767 if (! locate_v1_virtual_dwo_sections (sectp, §ions))
9769 error (_("Dwarf Error: bad DWP hash table, invalid section found"
9776 || dwarf2_section_empty_p (§ions.info_or_types)
9777 || dwarf2_section_empty_p (§ions.abbrev))
9779 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
9783 if (i == MAX_NR_V1_DWO_SECTIONS)
9785 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
9790 /* It's easier for the rest of the code if we fake a struct dwo_file and
9791 have dwo_unit "live" in that. At least for now.
9793 The DWP file can be made up of a random collection of CUs and TUs.
9794 However, for each CU + set of TUs that came from the same original DWO
9795 file, we can combine them back into a virtual DWO file to save space
9796 (fewer struct dwo_file objects to allocate). Remember that for really
9797 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
9800 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
9801 get_section_id (§ions.abbrev),
9802 get_section_id (§ions.line),
9803 get_section_id (§ions.loc),
9804 get_section_id (§ions.str_offsets));
9805 make_cleanup (xfree, virtual_dwo_name);
9806 /* Can we use an existing virtual DWO file? */
9807 dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir);
9808 /* Create one if necessary. */
9809 if (*dwo_file_slot == NULL)
9811 if (dwarf2_read_debug)
9813 fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n",
9816 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
9817 dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack,
9819 strlen (virtual_dwo_name));
9820 dwo_file->comp_dir = comp_dir;
9821 dwo_file->sections.abbrev = sections.abbrev;
9822 dwo_file->sections.line = sections.line;
9823 dwo_file->sections.loc = sections.loc;
9824 dwo_file->sections.macinfo = sections.macinfo;
9825 dwo_file->sections.macro = sections.macro;
9826 dwo_file->sections.str_offsets = sections.str_offsets;
9827 /* The "str" section is global to the entire DWP file. */
9828 dwo_file->sections.str = dwp_file->sections.str;
9829 /* The info or types section is assigned below to dwo_unit,
9830 there's no need to record it in dwo_file.
9831 Also, we can't simply record type sections in dwo_file because
9832 we record a pointer into the vector in dwo_unit. As we collect more
9833 types we'll grow the vector and eventually have to reallocate space
9834 for it, invalidating all copies of pointers into the previous
9836 *dwo_file_slot = dwo_file;
9840 if (dwarf2_read_debug)
9842 fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n",
9845 dwo_file = *dwo_file_slot;
9847 do_cleanups (cleanups);
9849 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
9850 dwo_unit->dwo_file = dwo_file;
9851 dwo_unit->signature = signature;
9852 dwo_unit->section = obstack_alloc (&objfile->objfile_obstack,
9853 sizeof (struct dwarf2_section_info));
9854 *dwo_unit->section = sections.info_or_types;
9855 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
9860 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
9861 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
9862 piece within that section used by a TU/CU, return a virtual section
9863 of just that piece. */
9865 static struct dwarf2_section_info
9866 create_dwp_v2_section (struct dwarf2_section_info *section,
9867 bfd_size_type offset, bfd_size_type size)
9869 struct dwarf2_section_info result;
9872 gdb_assert (section != NULL);
9873 gdb_assert (!section->is_virtual);
9875 memset (&result, 0, sizeof (result));
9876 result.s.containing_section = section;
9877 result.is_virtual = 1;
9882 sectp = get_section_bfd_section (section);
9884 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
9885 bounds of the real section. This is a pretty-rare event, so just
9886 flag an error (easier) instead of a warning and trying to cope. */
9888 || offset + size > bfd_get_section_size (sectp))
9890 bfd *abfd = sectp->owner;
9892 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
9893 " in section %s [in module %s]"),
9894 sectp ? bfd_section_name (abfd, sectp) : "<unknown>",
9895 objfile_name (dwarf2_per_objfile->objfile));
9898 result.virtual_offset = offset;
9903 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9904 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9905 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9906 This is for DWP version 2 files. */
9908 static struct dwo_unit *
9909 create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file,
9910 uint32_t unit_index,
9911 const char *comp_dir,
9912 ULONGEST signature, int is_debug_types)
9914 struct objfile *objfile = dwarf2_per_objfile->objfile;
9915 const struct dwp_hash_table *dwp_htab =
9916 is_debug_types ? dwp_file->tus : dwp_file->cus;
9917 bfd *dbfd = dwp_file->dbfd;
9918 const char *kind = is_debug_types ? "TU" : "CU";
9919 struct dwo_file *dwo_file;
9920 struct dwo_unit *dwo_unit;
9921 struct virtual_v2_dwo_sections sections;
9922 void **dwo_file_slot;
9923 char *virtual_dwo_name;
9924 struct dwarf2_section_info *cutu;
9925 struct cleanup *cleanups;
9928 gdb_assert (dwp_file->version == 2);
9930 if (dwarf2_read_debug)
9932 fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n",
9934 pulongest (unit_index), hex_string (signature),
9938 /* Fetch the section offsets of this DWO unit. */
9940 memset (§ions, 0, sizeof (sections));
9941 cleanups = make_cleanup (null_cleanup, 0);
9943 for (i = 0; i < dwp_htab->nr_columns; ++i)
9945 uint32_t offset = read_4_bytes (dbfd,
9946 dwp_htab->section_pool.v2.offsets
9947 + (((unit_index - 1) * dwp_htab->nr_columns
9949 * sizeof (uint32_t)));
9950 uint32_t size = read_4_bytes (dbfd,
9951 dwp_htab->section_pool.v2.sizes
9952 + (((unit_index - 1) * dwp_htab->nr_columns
9954 * sizeof (uint32_t)));
9956 switch (dwp_htab->section_pool.v2.section_ids[i])
9960 sections.info_or_types_offset = offset;
9961 sections.info_or_types_size = size;
9963 case DW_SECT_ABBREV:
9964 sections.abbrev_offset = offset;
9965 sections.abbrev_size = size;
9968 sections.line_offset = offset;
9969 sections.line_size = size;
9972 sections.loc_offset = offset;
9973 sections.loc_size = size;
9975 case DW_SECT_STR_OFFSETS:
9976 sections.str_offsets_offset = offset;
9977 sections.str_offsets_size = size;
9979 case DW_SECT_MACINFO:
9980 sections.macinfo_offset = offset;
9981 sections.macinfo_size = size;
9984 sections.macro_offset = offset;
9985 sections.macro_size = size;
9990 /* It's easier for the rest of the code if we fake a struct dwo_file and
9991 have dwo_unit "live" in that. At least for now.
9993 The DWP file can be made up of a random collection of CUs and TUs.
9994 However, for each CU + set of TUs that came from the same original DWO
9995 file, we can combine them back into a virtual DWO file to save space
9996 (fewer struct dwo_file objects to allocate). Remember that for really
9997 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10000 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10001 (long) (sections.abbrev_size ? sections.abbrev_offset : 0),
10002 (long) (sections.line_size ? sections.line_offset : 0),
10003 (long) (sections.loc_size ? sections.loc_offset : 0),
10004 (long) (sections.str_offsets_size
10005 ? sections.str_offsets_offset : 0));
10006 make_cleanup (xfree, virtual_dwo_name);
10007 /* Can we use an existing virtual DWO file? */
10008 dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir);
10009 /* Create one if necessary. */
10010 if (*dwo_file_slot == NULL)
10012 if (dwarf2_read_debug)
10014 fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n",
10017 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
10018 dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack,
10020 strlen (virtual_dwo_name));
10021 dwo_file->comp_dir = comp_dir;
10022 dwo_file->sections.abbrev =
10023 create_dwp_v2_section (&dwp_file->sections.abbrev,
10024 sections.abbrev_offset, sections.abbrev_size);
10025 dwo_file->sections.line =
10026 create_dwp_v2_section (&dwp_file->sections.line,
10027 sections.line_offset, sections.line_size);
10028 dwo_file->sections.loc =
10029 create_dwp_v2_section (&dwp_file->sections.loc,
10030 sections.loc_offset, sections.loc_size);
10031 dwo_file->sections.macinfo =
10032 create_dwp_v2_section (&dwp_file->sections.macinfo,
10033 sections.macinfo_offset, sections.macinfo_size);
10034 dwo_file->sections.macro =
10035 create_dwp_v2_section (&dwp_file->sections.macro,
10036 sections.macro_offset, sections.macro_size);
10037 dwo_file->sections.str_offsets =
10038 create_dwp_v2_section (&dwp_file->sections.str_offsets,
10039 sections.str_offsets_offset,
10040 sections.str_offsets_size);
10041 /* The "str" section is global to the entire DWP file. */
10042 dwo_file->sections.str = dwp_file->sections.str;
10043 /* The info or types section is assigned below to dwo_unit,
10044 there's no need to record it in dwo_file.
10045 Also, we can't simply record type sections in dwo_file because
10046 we record a pointer into the vector in dwo_unit. As we collect more
10047 types we'll grow the vector and eventually have to reallocate space
10048 for it, invalidating all copies of pointers into the previous
10050 *dwo_file_slot = dwo_file;
10054 if (dwarf2_read_debug)
10056 fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n",
10059 dwo_file = *dwo_file_slot;
10061 do_cleanups (cleanups);
10063 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
10064 dwo_unit->dwo_file = dwo_file;
10065 dwo_unit->signature = signature;
10066 dwo_unit->section = obstack_alloc (&objfile->objfile_obstack,
10067 sizeof (struct dwarf2_section_info));
10068 *dwo_unit->section = create_dwp_v2_section (is_debug_types
10069 ? &dwp_file->sections.types
10070 : &dwp_file->sections.info,
10071 sections.info_or_types_offset,
10072 sections.info_or_types_size);
10073 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10078 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10079 Returns NULL if the signature isn't found. */
10081 static struct dwo_unit *
10082 lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir,
10083 ULONGEST signature, int is_debug_types)
10085 const struct dwp_hash_table *dwp_htab =
10086 is_debug_types ? dwp_file->tus : dwp_file->cus;
10087 bfd *dbfd = dwp_file->dbfd;
10088 uint32_t mask = dwp_htab->nr_slots - 1;
10089 uint32_t hash = signature & mask;
10090 uint32_t hash2 = ((signature >> 32) & mask) | 1;
10093 struct dwo_unit find_dwo_cu, *dwo_cu;
10095 memset (&find_dwo_cu, 0, sizeof (find_dwo_cu));
10096 find_dwo_cu.signature = signature;
10097 slot = htab_find_slot (is_debug_types
10098 ? dwp_file->loaded_tus
10099 : dwp_file->loaded_cus,
10100 &find_dwo_cu, INSERT);
10105 /* Use a for loop so that we don't loop forever on bad debug info. */
10106 for (i = 0; i < dwp_htab->nr_slots; ++i)
10108 ULONGEST signature_in_table;
10110 signature_in_table =
10111 read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t));
10112 if (signature_in_table == signature)
10114 uint32_t unit_index =
10115 read_4_bytes (dbfd,
10116 dwp_htab->unit_table + hash * sizeof (uint32_t));
10118 if (dwp_file->version == 1)
10120 *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index,
10121 comp_dir, signature,
10126 *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index,
10127 comp_dir, signature,
10132 if (signature_in_table == 0)
10134 hash = (hash + hash2) & mask;
10137 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10138 " [in module %s]"),
10142 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10143 Open the file specified by FILE_NAME and hand it off to BFD for
10144 preliminary analysis. Return a newly initialized bfd *, which
10145 includes a canonicalized copy of FILE_NAME.
10146 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10147 SEARCH_CWD is true if the current directory is to be searched.
10148 It will be searched before debug-file-directory.
10149 If successful, the file is added to the bfd include table of the
10150 objfile's bfd (see gdb_bfd_record_inclusion).
10151 If unable to find/open the file, return NULL.
10152 NOTE: This function is derived from symfile_bfd_open. */
10155 try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd)
10159 char *absolute_name;
10160 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10161 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10162 to debug_file_directory. */
10164 static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' };
10168 if (*debug_file_directory != '\0')
10169 search_path = concat (".", dirname_separator_string,
10170 debug_file_directory, NULL);
10172 search_path = xstrdup (".");
10175 search_path = xstrdup (debug_file_directory);
10177 flags = OPF_RETURN_REALPATH;
10179 flags |= OPF_SEARCH_IN_PATH;
10180 desc = openp (search_path, flags, file_name,
10181 O_RDONLY | O_BINARY, &absolute_name);
10182 xfree (search_path);
10186 sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc);
10187 xfree (absolute_name);
10188 if (sym_bfd == NULL)
10190 bfd_set_cacheable (sym_bfd, 1);
10192 if (!bfd_check_format (sym_bfd, bfd_object))
10194 gdb_bfd_unref (sym_bfd); /* This also closes desc. */
10198 /* Success. Record the bfd as having been included by the objfile's bfd.
10199 This is important because things like demangled_names_hash lives in the
10200 objfile's per_bfd space and may have references to things like symbol
10201 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10202 gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd);
10207 /* Try to open DWO file FILE_NAME.
10208 COMP_DIR is the DW_AT_comp_dir attribute.
10209 The result is the bfd handle of the file.
10210 If there is a problem finding or opening the file, return NULL.
10211 Upon success, the canonicalized path of the file is stored in the bfd,
10212 same as symfile_bfd_open. */
10215 open_dwo_file (const char *file_name, const char *comp_dir)
10219 if (IS_ABSOLUTE_PATH (file_name))
10220 return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/);
10222 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10224 if (comp_dir != NULL)
10226 char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL);
10228 /* NOTE: If comp_dir is a relative path, this will also try the
10229 search path, which seems useful. */
10230 abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/);
10231 xfree (path_to_try);
10236 /* That didn't work, try debug-file-directory, which, despite its name,
10237 is a list of paths. */
10239 if (*debug_file_directory == '\0')
10242 return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/);
10245 /* This function is mapped across the sections and remembers the offset and
10246 size of each of the DWO debugging sections we are interested in. */
10249 dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr)
10251 struct dwo_sections *dwo_sections = dwo_sections_ptr;
10252 const struct dwop_section_names *names = &dwop_section_names;
10254 if (section_is_p (sectp->name, &names->abbrev_dwo))
10256 dwo_sections->abbrev.s.asection = sectp;
10257 dwo_sections->abbrev.size = bfd_get_section_size (sectp);
10259 else if (section_is_p (sectp->name, &names->info_dwo))
10261 dwo_sections->info.s.asection = sectp;
10262 dwo_sections->info.size = bfd_get_section_size (sectp);
10264 else if (section_is_p (sectp->name, &names->line_dwo))
10266 dwo_sections->line.s.asection = sectp;
10267 dwo_sections->line.size = bfd_get_section_size (sectp);
10269 else if (section_is_p (sectp->name, &names->loc_dwo))
10271 dwo_sections->loc.s.asection = sectp;
10272 dwo_sections->loc.size = bfd_get_section_size (sectp);
10274 else if (section_is_p (sectp->name, &names->macinfo_dwo))
10276 dwo_sections->macinfo.s.asection = sectp;
10277 dwo_sections->macinfo.size = bfd_get_section_size (sectp);
10279 else if (section_is_p (sectp->name, &names->macro_dwo))
10281 dwo_sections->macro.s.asection = sectp;
10282 dwo_sections->macro.size = bfd_get_section_size (sectp);
10284 else if (section_is_p (sectp->name, &names->str_dwo))
10286 dwo_sections->str.s.asection = sectp;
10287 dwo_sections->str.size = bfd_get_section_size (sectp);
10289 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
10291 dwo_sections->str_offsets.s.asection = sectp;
10292 dwo_sections->str_offsets.size = bfd_get_section_size (sectp);
10294 else if (section_is_p (sectp->name, &names->types_dwo))
10296 struct dwarf2_section_info type_section;
10298 memset (&type_section, 0, sizeof (type_section));
10299 type_section.s.asection = sectp;
10300 type_section.size = bfd_get_section_size (sectp);
10301 VEC_safe_push (dwarf2_section_info_def, dwo_sections->types,
10306 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10307 by PER_CU. This is for the non-DWP case.
10308 The result is NULL if DWO_NAME can't be found. */
10310 static struct dwo_file *
10311 open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu,
10312 const char *dwo_name, const char *comp_dir)
10314 struct objfile *objfile = dwarf2_per_objfile->objfile;
10315 struct dwo_file *dwo_file;
10317 struct cleanup *cleanups;
10319 dbfd = open_dwo_file (dwo_name, comp_dir);
10322 if (dwarf2_read_debug)
10323 fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name);
10326 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
10327 dwo_file->dwo_name = dwo_name;
10328 dwo_file->comp_dir = comp_dir;
10329 dwo_file->dbfd = dbfd;
10331 cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file);
10333 bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections);
10335 dwo_file->cu = create_dwo_cu (dwo_file);
10337 dwo_file->tus = create_debug_types_hash_table (dwo_file,
10338 dwo_file->sections.types);
10340 discard_cleanups (cleanups);
10342 if (dwarf2_read_debug)
10343 fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name);
10348 /* This function is mapped across the sections and remembers the offset and
10349 size of each of the DWP debugging sections common to version 1 and 2 that
10350 we are interested in. */
10353 dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp,
10354 void *dwp_file_ptr)
10356 struct dwp_file *dwp_file = dwp_file_ptr;
10357 const struct dwop_section_names *names = &dwop_section_names;
10358 unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
10360 /* Record the ELF section number for later lookup: this is what the
10361 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10362 gdb_assert (elf_section_nr < dwp_file->num_sections);
10363 dwp_file->elf_sections[elf_section_nr] = sectp;
10365 /* Look for specific sections that we need. */
10366 if (section_is_p (sectp->name, &names->str_dwo))
10368 dwp_file->sections.str.s.asection = sectp;
10369 dwp_file->sections.str.size = bfd_get_section_size (sectp);
10371 else if (section_is_p (sectp->name, &names->cu_index))
10373 dwp_file->sections.cu_index.s.asection = sectp;
10374 dwp_file->sections.cu_index.size = bfd_get_section_size (sectp);
10376 else if (section_is_p (sectp->name, &names->tu_index))
10378 dwp_file->sections.tu_index.s.asection = sectp;
10379 dwp_file->sections.tu_index.size = bfd_get_section_size (sectp);
10383 /* This function is mapped across the sections and remembers the offset and
10384 size of each of the DWP version 2 debugging sections that we are interested
10385 in. This is split into a separate function because we don't know if we
10386 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10389 dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr)
10391 struct dwp_file *dwp_file = dwp_file_ptr;
10392 const struct dwop_section_names *names = &dwop_section_names;
10393 unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
10395 /* Record the ELF section number for later lookup: this is what the
10396 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10397 gdb_assert (elf_section_nr < dwp_file->num_sections);
10398 dwp_file->elf_sections[elf_section_nr] = sectp;
10400 /* Look for specific sections that we need. */
10401 if (section_is_p (sectp->name, &names->abbrev_dwo))
10403 dwp_file->sections.abbrev.s.asection = sectp;
10404 dwp_file->sections.abbrev.size = bfd_get_section_size (sectp);
10406 else if (section_is_p (sectp->name, &names->info_dwo))
10408 dwp_file->sections.info.s.asection = sectp;
10409 dwp_file->sections.info.size = bfd_get_section_size (sectp);
10411 else if (section_is_p (sectp->name, &names->line_dwo))
10413 dwp_file->sections.line.s.asection = sectp;
10414 dwp_file->sections.line.size = bfd_get_section_size (sectp);
10416 else if (section_is_p (sectp->name, &names->loc_dwo))
10418 dwp_file->sections.loc.s.asection = sectp;
10419 dwp_file->sections.loc.size = bfd_get_section_size (sectp);
10421 else if (section_is_p (sectp->name, &names->macinfo_dwo))
10423 dwp_file->sections.macinfo.s.asection = sectp;
10424 dwp_file->sections.macinfo.size = bfd_get_section_size (sectp);
10426 else if (section_is_p (sectp->name, &names->macro_dwo))
10428 dwp_file->sections.macro.s.asection = sectp;
10429 dwp_file->sections.macro.size = bfd_get_section_size (sectp);
10431 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
10433 dwp_file->sections.str_offsets.s.asection = sectp;
10434 dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp);
10436 else if (section_is_p (sectp->name, &names->types_dwo))
10438 dwp_file->sections.types.s.asection = sectp;
10439 dwp_file->sections.types.size = bfd_get_section_size (sectp);
10443 /* Hash function for dwp_file loaded CUs/TUs. */
10446 hash_dwp_loaded_cutus (const void *item)
10448 const struct dwo_unit *dwo_unit = item;
10450 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10451 return dwo_unit->signature;
10454 /* Equality function for dwp_file loaded CUs/TUs. */
10457 eq_dwp_loaded_cutus (const void *a, const void *b)
10459 const struct dwo_unit *dua = a;
10460 const struct dwo_unit *dub = b;
10462 return dua->signature == dub->signature;
10465 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10468 allocate_dwp_loaded_cutus_table (struct objfile *objfile)
10470 return htab_create_alloc_ex (3,
10471 hash_dwp_loaded_cutus,
10472 eq_dwp_loaded_cutus,
10474 &objfile->objfile_obstack,
10475 hashtab_obstack_allocate,
10476 dummy_obstack_deallocate);
10479 /* Try to open DWP file FILE_NAME.
10480 The result is the bfd handle of the file.
10481 If there is a problem finding or opening the file, return NULL.
10482 Upon success, the canonicalized path of the file is stored in the bfd,
10483 same as symfile_bfd_open. */
10486 open_dwp_file (const char *file_name)
10490 abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/);
10494 /* Work around upstream bug 15652.
10495 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10496 [Whether that's a "bug" is debatable, but it is getting in our way.]
10497 We have no real idea where the dwp file is, because gdb's realpath-ing
10498 of the executable's path may have discarded the needed info.
10499 [IWBN if the dwp file name was recorded in the executable, akin to
10500 .gnu_debuglink, but that doesn't exist yet.]
10501 Strip the directory from FILE_NAME and search again. */
10502 if (*debug_file_directory != '\0')
10504 /* Don't implicitly search the current directory here.
10505 If the user wants to search "." to handle this case,
10506 it must be added to debug-file-directory. */
10507 return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/,
10514 /* Initialize the use of the DWP file for the current objfile.
10515 By convention the name of the DWP file is ${objfile}.dwp.
10516 The result is NULL if it can't be found. */
10518 static struct dwp_file *
10519 open_and_init_dwp_file (void)
10521 struct objfile *objfile = dwarf2_per_objfile->objfile;
10522 struct dwp_file *dwp_file;
10525 struct cleanup *cleanups;
10527 /* Try to find first .dwp for the binary file before any symbolic links
10529 dwp_name = xstrprintf ("%s.dwp", objfile->original_name);
10530 cleanups = make_cleanup (xfree, dwp_name);
10532 dbfd = open_dwp_file (dwp_name);
10534 && strcmp (objfile->original_name, objfile_name (objfile)) != 0)
10536 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10537 dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile));
10538 make_cleanup (xfree, dwp_name);
10539 dbfd = open_dwp_file (dwp_name);
10544 if (dwarf2_read_debug)
10545 fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name);
10546 do_cleanups (cleanups);
10549 dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file);
10550 dwp_file->name = bfd_get_filename (dbfd);
10551 dwp_file->dbfd = dbfd;
10552 do_cleanups (cleanups);
10554 /* +1: section 0 is unused */
10555 dwp_file->num_sections = bfd_count_sections (dbfd) + 1;
10556 dwp_file->elf_sections =
10557 OBSTACK_CALLOC (&objfile->objfile_obstack,
10558 dwp_file->num_sections, asection *);
10560 bfd_map_over_sections (dbfd, dwarf2_locate_common_dwp_sections, dwp_file);
10562 dwp_file->cus = create_dwp_hash_table (dwp_file, 0);
10564 dwp_file->tus = create_dwp_hash_table (dwp_file, 1);
10566 /* The DWP file version is stored in the hash table. Oh well. */
10567 if (dwp_file->cus->version != dwp_file->tus->version)
10569 /* Technically speaking, we should try to limp along, but this is
10570 pretty bizarre. We use pulongest here because that's the established
10571 portability solution (e.g, we cannot use %u for uint32_t). */
10572 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10573 " TU version %s [in DWP file %s]"),
10574 pulongest (dwp_file->cus->version),
10575 pulongest (dwp_file->tus->version), dwp_name);
10577 dwp_file->version = dwp_file->cus->version;
10579 if (dwp_file->version == 2)
10580 bfd_map_over_sections (dbfd, dwarf2_locate_v2_dwp_sections, dwp_file);
10582 dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile);
10583 dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile);
10585 if (dwarf2_read_debug)
10587 fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name);
10588 fprintf_unfiltered (gdb_stdlog,
10589 " %s CUs, %s TUs\n",
10590 pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0),
10591 pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0));
10597 /* Wrapper around open_and_init_dwp_file, only open it once. */
10599 static struct dwp_file *
10600 get_dwp_file (void)
10602 if (! dwarf2_per_objfile->dwp_checked)
10604 dwarf2_per_objfile->dwp_file = open_and_init_dwp_file ();
10605 dwarf2_per_objfile->dwp_checked = 1;
10607 return dwarf2_per_objfile->dwp_file;
10610 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10611 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10612 or in the DWP file for the objfile, referenced by THIS_UNIT.
10613 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10614 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10616 This is called, for example, when wanting to read a variable with a
10617 complex location. Therefore we don't want to do file i/o for every call.
10618 Therefore we don't want to look for a DWO file on every call.
10619 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10620 then we check if we've already seen DWO_NAME, and only THEN do we check
10623 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10624 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10626 static struct dwo_unit *
10627 lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit,
10628 const char *dwo_name, const char *comp_dir,
10629 ULONGEST signature, int is_debug_types)
10631 struct objfile *objfile = dwarf2_per_objfile->objfile;
10632 const char *kind = is_debug_types ? "TU" : "CU";
10633 void **dwo_file_slot;
10634 struct dwo_file *dwo_file;
10635 struct dwp_file *dwp_file;
10637 /* First see if there's a DWP file.
10638 If we have a DWP file but didn't find the DWO inside it, don't
10639 look for the original DWO file. It makes gdb behave differently
10640 depending on whether one is debugging in the build tree. */
10642 dwp_file = get_dwp_file ();
10643 if (dwp_file != NULL)
10645 const struct dwp_hash_table *dwp_htab =
10646 is_debug_types ? dwp_file->tus : dwp_file->cus;
10648 if (dwp_htab != NULL)
10650 struct dwo_unit *dwo_cutu =
10651 lookup_dwo_unit_in_dwp (dwp_file, comp_dir,
10652 signature, is_debug_types);
10654 if (dwo_cutu != NULL)
10656 if (dwarf2_read_debug)
10658 fprintf_unfiltered (gdb_stdlog,
10659 "Virtual DWO %s %s found: @%s\n",
10660 kind, hex_string (signature),
10661 host_address_to_string (dwo_cutu));
10669 /* No DWP file, look for the DWO file. */
10671 dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir);
10672 if (*dwo_file_slot == NULL)
10674 /* Read in the file and build a table of the CUs/TUs it contains. */
10675 *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir);
10677 /* NOTE: This will be NULL if unable to open the file. */
10678 dwo_file = *dwo_file_slot;
10680 if (dwo_file != NULL)
10682 struct dwo_unit *dwo_cutu = NULL;
10684 if (is_debug_types && dwo_file->tus)
10686 struct dwo_unit find_dwo_cutu;
10688 memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu));
10689 find_dwo_cutu.signature = signature;
10690 dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu);
10692 else if (!is_debug_types && dwo_file->cu)
10694 if (signature == dwo_file->cu->signature)
10695 dwo_cutu = dwo_file->cu;
10698 if (dwo_cutu != NULL)
10700 if (dwarf2_read_debug)
10702 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n",
10703 kind, dwo_name, hex_string (signature),
10704 host_address_to_string (dwo_cutu));
10711 /* We didn't find it. This could mean a dwo_id mismatch, or
10712 someone deleted the DWO/DWP file, or the search path isn't set up
10713 correctly to find the file. */
10715 if (dwarf2_read_debug)
10717 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n",
10718 kind, dwo_name, hex_string (signature));
10721 /* This is a warning and not a complaint because it can be caused by
10722 pilot error (e.g., user accidentally deleting the DWO). */
10724 /* Print the name of the DWP file if we looked there, helps the user
10725 better diagnose the problem. */
10726 char *dwp_text = NULL;
10727 struct cleanup *cleanups;
10729 if (dwp_file != NULL)
10730 dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name));
10731 cleanups = make_cleanup (xfree, dwp_text);
10733 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
10734 " [in module %s]"),
10735 kind, dwo_name, hex_string (signature),
10736 dwp_text != NULL ? dwp_text : "",
10737 this_unit->is_debug_types ? "TU" : "CU",
10738 this_unit->offset.sect_off, objfile_name (objfile));
10740 do_cleanups (cleanups);
10745 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
10746 See lookup_dwo_cutu_unit for details. */
10748 static struct dwo_unit *
10749 lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu,
10750 const char *dwo_name, const char *comp_dir,
10751 ULONGEST signature)
10753 return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0);
10756 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
10757 See lookup_dwo_cutu_unit for details. */
10759 static struct dwo_unit *
10760 lookup_dwo_type_unit (struct signatured_type *this_tu,
10761 const char *dwo_name, const char *comp_dir)
10763 return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1);
10766 /* Traversal function for queue_and_load_all_dwo_tus. */
10769 queue_and_load_dwo_tu (void **slot, void *info)
10771 struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot;
10772 struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info;
10773 ULONGEST signature = dwo_unit->signature;
10774 struct signatured_type *sig_type =
10775 lookup_dwo_signatured_type (per_cu->cu, signature);
10777 if (sig_type != NULL)
10779 struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu;
10781 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
10782 a real dependency of PER_CU on SIG_TYPE. That is detected later
10783 while processing PER_CU. */
10784 if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language))
10785 load_full_type_unit (sig_cu);
10786 VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu);
10792 /* Queue all TUs contained in the DWO of PER_CU to be read in.
10793 The DWO may have the only definition of the type, though it may not be
10794 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
10795 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
10798 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu)
10800 struct dwo_unit *dwo_unit;
10801 struct dwo_file *dwo_file;
10803 gdb_assert (!per_cu->is_debug_types);
10804 gdb_assert (get_dwp_file () == NULL);
10805 gdb_assert (per_cu->cu != NULL);
10807 dwo_unit = per_cu->cu->dwo_unit;
10808 gdb_assert (dwo_unit != NULL);
10810 dwo_file = dwo_unit->dwo_file;
10811 if (dwo_file->tus != NULL)
10812 htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu);
10815 /* Free all resources associated with DWO_FILE.
10816 Close the DWO file and munmap the sections.
10817 All memory should be on the objfile obstack. */
10820 free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile)
10823 struct dwarf2_section_info *section;
10825 /* Note: dbfd is NULL for virtual DWO files. */
10826 gdb_bfd_unref (dwo_file->dbfd);
10828 VEC_free (dwarf2_section_info_def, dwo_file->sections.types);
10831 /* Wrapper for free_dwo_file for use in cleanups. */
10834 free_dwo_file_cleanup (void *arg)
10836 struct dwo_file *dwo_file = (struct dwo_file *) arg;
10837 struct objfile *objfile = dwarf2_per_objfile->objfile;
10839 free_dwo_file (dwo_file, objfile);
10842 /* Traversal function for free_dwo_files. */
10845 free_dwo_file_from_slot (void **slot, void *info)
10847 struct dwo_file *dwo_file = (struct dwo_file *) *slot;
10848 struct objfile *objfile = (struct objfile *) info;
10850 free_dwo_file (dwo_file, objfile);
10855 /* Free all resources associated with DWO_FILES. */
10858 free_dwo_files (htab_t dwo_files, struct objfile *objfile)
10860 htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile);
10863 /* Read in various DIEs. */
10865 /* qsort helper for inherit_abstract_dies. */
10868 unsigned_int_compar (const void *ap, const void *bp)
10870 unsigned int a = *(unsigned int *) ap;
10871 unsigned int b = *(unsigned int *) bp;
10873 return (a > b) - (b > a);
10876 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
10877 Inherit only the children of the DW_AT_abstract_origin DIE not being
10878 already referenced by DW_AT_abstract_origin from the children of the
10882 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
10884 struct die_info *child_die;
10885 unsigned die_children_count;
10886 /* CU offsets which were referenced by children of the current DIE. */
10887 sect_offset *offsets;
10888 sect_offset *offsets_end, *offsetp;
10889 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
10890 struct die_info *origin_die;
10891 /* Iterator of the ORIGIN_DIE children. */
10892 struct die_info *origin_child_die;
10893 struct cleanup *cleanups;
10894 struct attribute *attr;
10895 struct dwarf2_cu *origin_cu;
10896 struct pending **origin_previous_list_in_scope;
10898 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
10902 /* Note that following die references may follow to a die in a
10906 origin_die = follow_die_ref (die, attr, &origin_cu);
10908 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
10910 origin_previous_list_in_scope = origin_cu->list_in_scope;
10911 origin_cu->list_in_scope = cu->list_in_scope;
10913 if (die->tag != origin_die->tag
10914 && !(die->tag == DW_TAG_inlined_subroutine
10915 && origin_die->tag == DW_TAG_subprogram))
10916 complaint (&symfile_complaints,
10917 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
10918 die->offset.sect_off, origin_die->offset.sect_off);
10920 child_die = die->child;
10921 die_children_count = 0;
10922 while (child_die && child_die->tag)
10924 child_die = sibling_die (child_die);
10925 die_children_count++;
10927 offsets = xmalloc (sizeof (*offsets) * die_children_count);
10928 cleanups = make_cleanup (xfree, offsets);
10930 offsets_end = offsets;
10931 child_die = die->child;
10932 while (child_die && child_die->tag)
10934 /* For each CHILD_DIE, find the corresponding child of
10935 ORIGIN_DIE. If there is more than one layer of
10936 DW_AT_abstract_origin, follow them all; there shouldn't be,
10937 but GCC versions at least through 4.4 generate this (GCC PR
10939 struct die_info *child_origin_die = child_die;
10940 struct dwarf2_cu *child_origin_cu = cu;
10944 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
10948 child_origin_die = follow_die_ref (child_origin_die, attr,
10952 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
10953 counterpart may exist. */
10954 if (child_origin_die != child_die)
10956 if (child_die->tag != child_origin_die->tag
10957 && !(child_die->tag == DW_TAG_inlined_subroutine
10958 && child_origin_die->tag == DW_TAG_subprogram))
10959 complaint (&symfile_complaints,
10960 _("Child DIE 0x%x and its abstract origin 0x%x have "
10961 "different tags"), child_die->offset.sect_off,
10962 child_origin_die->offset.sect_off);
10963 if (child_origin_die->parent != origin_die)
10964 complaint (&symfile_complaints,
10965 _("Child DIE 0x%x and its abstract origin 0x%x have "
10966 "different parents"), child_die->offset.sect_off,
10967 child_origin_die->offset.sect_off);
10969 *offsets_end++ = child_origin_die->offset;
10971 child_die = sibling_die (child_die);
10973 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
10974 unsigned_int_compar);
10975 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
10976 if (offsetp[-1].sect_off == offsetp->sect_off)
10977 complaint (&symfile_complaints,
10978 _("Multiple children of DIE 0x%x refer "
10979 "to DIE 0x%x as their abstract origin"),
10980 die->offset.sect_off, offsetp->sect_off);
10983 origin_child_die = origin_die->child;
10984 while (origin_child_die && origin_child_die->tag)
10986 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
10987 while (offsetp < offsets_end
10988 && offsetp->sect_off < origin_child_die->offset.sect_off)
10990 if (offsetp >= offsets_end
10991 || offsetp->sect_off > origin_child_die->offset.sect_off)
10993 /* Found that ORIGIN_CHILD_DIE is really not referenced.
10994 Check whether we're already processing ORIGIN_CHILD_DIE.
10995 This can happen with mutually referenced abstract_origins.
10997 if (!origin_child_die->in_process)
10998 process_die (origin_child_die, origin_cu);
11000 origin_child_die = sibling_die (origin_child_die);
11002 origin_cu->list_in_scope = origin_previous_list_in_scope;
11004 do_cleanups (cleanups);
11008 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
11010 struct objfile *objfile = cu->objfile;
11011 struct context_stack *new;
11014 struct die_info *child_die;
11015 struct attribute *attr, *call_line, *call_file;
11017 CORE_ADDR baseaddr;
11018 struct block *block;
11019 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
11020 VEC (symbolp) *template_args = NULL;
11021 struct template_symbol *templ_func = NULL;
11025 /* If we do not have call site information, we can't show the
11026 caller of this inlined function. That's too confusing, so
11027 only use the scope for local variables. */
11028 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
11029 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
11030 if (call_line == NULL || call_file == NULL)
11032 read_lexical_block_scope (die, cu);
11037 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11039 name = dwarf2_name (die, cu);
11041 /* Ignore functions with missing or empty names. These are actually
11042 illegal according to the DWARF standard. */
11045 complaint (&symfile_complaints,
11046 _("missing name for subprogram DIE at %d"),
11047 die->offset.sect_off);
11051 /* Ignore functions with missing or invalid low and high pc attributes. */
11052 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
11054 attr = dwarf2_attr (die, DW_AT_external, cu);
11055 if (!attr || !DW_UNSND (attr))
11056 complaint (&symfile_complaints,
11057 _("cannot get low and high bounds "
11058 "for subprogram DIE at %d"),
11059 die->offset.sect_off);
11064 highpc += baseaddr;
11066 /* If we have any template arguments, then we must allocate a
11067 different sort of symbol. */
11068 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
11070 if (child_die->tag == DW_TAG_template_type_param
11071 || child_die->tag == DW_TAG_template_value_param)
11073 templ_func = allocate_template_symbol (objfile);
11074 templ_func->base.is_cplus_template_function = 1;
11079 new = push_context (0, lowpc);
11080 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
11081 (struct symbol *) templ_func);
11083 /* If there is a location expression for DW_AT_frame_base, record
11085 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
11087 dwarf2_symbol_mark_computed (attr, new->name, cu, 1);
11089 cu->list_in_scope = &local_symbols;
11091 if (die->child != NULL)
11093 child_die = die->child;
11094 while (child_die && child_die->tag)
11096 if (child_die->tag == DW_TAG_template_type_param
11097 || child_die->tag == DW_TAG_template_value_param)
11099 struct symbol *arg = new_symbol (child_die, NULL, cu);
11102 VEC_safe_push (symbolp, template_args, arg);
11105 process_die (child_die, cu);
11106 child_die = sibling_die (child_die);
11110 inherit_abstract_dies (die, cu);
11112 /* If we have a DW_AT_specification, we might need to import using
11113 directives from the context of the specification DIE. See the
11114 comment in determine_prefix. */
11115 if (cu->language == language_cplus
11116 && dwarf2_attr (die, DW_AT_specification, cu))
11118 struct dwarf2_cu *spec_cu = cu;
11119 struct die_info *spec_die = die_specification (die, &spec_cu);
11123 child_die = spec_die->child;
11124 while (child_die && child_die->tag)
11126 if (child_die->tag == DW_TAG_imported_module)
11127 process_die (child_die, spec_cu);
11128 child_die = sibling_die (child_die);
11131 /* In some cases, GCC generates specification DIEs that
11132 themselves contain DW_AT_specification attributes. */
11133 spec_die = die_specification (spec_die, &spec_cu);
11137 new = pop_context ();
11138 /* Make a block for the local symbols within. */
11139 block = finish_block (new->name, &local_symbols, new->old_blocks,
11140 lowpc, highpc, objfile);
11142 /* For C++, set the block's scope. */
11143 if ((cu->language == language_cplus || cu->language == language_fortran)
11144 && cu->processing_has_namespace_info)
11145 block_set_scope (block, determine_prefix (die, cu),
11146 &objfile->objfile_obstack);
11148 /* If we have address ranges, record them. */
11149 dwarf2_record_block_ranges (die, block, baseaddr, cu);
11151 /* Attach template arguments to function. */
11152 if (! VEC_empty (symbolp, template_args))
11154 gdb_assert (templ_func != NULL);
11156 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
11157 templ_func->template_arguments
11158 = obstack_alloc (&objfile->objfile_obstack,
11159 (templ_func->n_template_arguments
11160 * sizeof (struct symbol *)));
11161 memcpy (templ_func->template_arguments,
11162 VEC_address (symbolp, template_args),
11163 (templ_func->n_template_arguments * sizeof (struct symbol *)));
11164 VEC_free (symbolp, template_args);
11167 /* In C++, we can have functions nested inside functions (e.g., when
11168 a function declares a class that has methods). This means that
11169 when we finish processing a function scope, we may need to go
11170 back to building a containing block's symbol lists. */
11171 local_symbols = new->locals;
11172 using_directives = new->using_directives;
11174 /* If we've finished processing a top-level function, subsequent
11175 symbols go in the file symbol list. */
11176 if (outermost_context_p ())
11177 cu->list_in_scope = &file_symbols;
11180 /* Process all the DIES contained within a lexical block scope. Start
11181 a new scope, process the dies, and then close the scope. */
11184 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
11186 struct objfile *objfile = cu->objfile;
11187 struct context_stack *new;
11188 CORE_ADDR lowpc, highpc;
11189 struct die_info *child_die;
11190 CORE_ADDR baseaddr;
11192 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11194 /* Ignore blocks with missing or invalid low and high pc attributes. */
11195 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11196 as multiple lexical blocks? Handling children in a sane way would
11197 be nasty. Might be easier to properly extend generic blocks to
11198 describe ranges. */
11199 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
11202 highpc += baseaddr;
11204 push_context (0, lowpc);
11205 if (die->child != NULL)
11207 child_die = die->child;
11208 while (child_die && child_die->tag)
11210 process_die (child_die, cu);
11211 child_die = sibling_die (child_die);
11214 new = pop_context ();
11216 if (local_symbols != NULL || using_directives != NULL)
11218 struct block *block
11219 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
11222 /* Note that recording ranges after traversing children, as we
11223 do here, means that recording a parent's ranges entails
11224 walking across all its children's ranges as they appear in
11225 the address map, which is quadratic behavior.
11227 It would be nicer to record the parent's ranges before
11228 traversing its children, simply overriding whatever you find
11229 there. But since we don't even decide whether to create a
11230 block until after we've traversed its children, that's hard
11232 dwarf2_record_block_ranges (die, block, baseaddr, cu);
11234 local_symbols = new->locals;
11235 using_directives = new->using_directives;
11238 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11241 read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu)
11243 struct objfile *objfile = cu->objfile;
11244 struct gdbarch *gdbarch = get_objfile_arch (objfile);
11245 CORE_ADDR pc, baseaddr;
11246 struct attribute *attr;
11247 struct call_site *call_site, call_site_local;
11250 struct die_info *child_die;
11252 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11254 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
11257 complaint (&symfile_complaints,
11258 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11259 "DIE 0x%x [in module %s]"),
11260 die->offset.sect_off, objfile_name (objfile));
11263 pc = DW_ADDR (attr) + baseaddr;
11265 if (cu->call_site_htab == NULL)
11266 cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq,
11267 NULL, &objfile->objfile_obstack,
11268 hashtab_obstack_allocate, NULL);
11269 call_site_local.pc = pc;
11270 slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT);
11273 complaint (&symfile_complaints,
11274 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11275 "DIE 0x%x [in module %s]"),
11276 paddress (gdbarch, pc), die->offset.sect_off,
11277 objfile_name (objfile));
11281 /* Count parameters at the caller. */
11284 for (child_die = die->child; child_die && child_die->tag;
11285 child_die = sibling_die (child_die))
11287 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
11289 complaint (&symfile_complaints,
11290 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11291 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11292 child_die->tag, child_die->offset.sect_off,
11293 objfile_name (objfile));
11300 call_site = obstack_alloc (&objfile->objfile_obstack,
11301 (sizeof (*call_site)
11302 + (sizeof (*call_site->parameter)
11303 * (nparams - 1))));
11305 memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter));
11306 call_site->pc = pc;
11308 if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu))
11310 struct die_info *func_die;
11312 /* Skip also over DW_TAG_inlined_subroutine. */
11313 for (func_die = die->parent;
11314 func_die && func_die->tag != DW_TAG_subprogram
11315 && func_die->tag != DW_TAG_subroutine_type;
11316 func_die = func_die->parent);
11318 /* DW_AT_GNU_all_call_sites is a superset
11319 of DW_AT_GNU_all_tail_call_sites. */
11321 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu)
11322 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu))
11324 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11325 not complete. But keep CALL_SITE for look ups via call_site_htab,
11326 both the initial caller containing the real return address PC and
11327 the final callee containing the current PC of a chain of tail
11328 calls do not need to have the tail call list complete. But any
11329 function candidate for a virtual tail call frame searched via
11330 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11331 determined unambiguously. */
11335 struct type *func_type = NULL;
11338 func_type = get_die_type (func_die, cu);
11339 if (func_type != NULL)
11341 gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC);
11343 /* Enlist this call site to the function. */
11344 call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type);
11345 TYPE_TAIL_CALL_LIST (func_type) = call_site;
11348 complaint (&symfile_complaints,
11349 _("Cannot find function owning DW_TAG_GNU_call_site "
11350 "DIE 0x%x [in module %s]"),
11351 die->offset.sect_off, objfile_name (objfile));
11355 attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu);
11357 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
11358 SET_FIELD_DWARF_BLOCK (call_site->target, NULL);
11359 if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0))
11360 /* Keep NULL DWARF_BLOCK. */;
11361 else if (attr_form_is_block (attr))
11363 struct dwarf2_locexpr_baton *dlbaton;
11365 dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton));
11366 dlbaton->data = DW_BLOCK (attr)->data;
11367 dlbaton->size = DW_BLOCK (attr)->size;
11368 dlbaton->per_cu = cu->per_cu;
11370 SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton);
11372 else if (attr_form_is_ref (attr))
11374 struct dwarf2_cu *target_cu = cu;
11375 struct die_info *target_die;
11377 target_die = follow_die_ref (die, attr, &target_cu);
11378 gdb_assert (target_cu->objfile == objfile);
11379 if (die_is_declaration (target_die, target_cu))
11381 const char *target_physname = NULL;
11382 struct attribute *target_attr;
11384 /* Prefer the mangled name; otherwise compute the demangled one. */
11385 target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu);
11386 if (target_attr == NULL)
11387 target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name,
11389 if (target_attr != NULL && DW_STRING (target_attr) != NULL)
11390 target_physname = DW_STRING (target_attr);
11392 target_physname = dwarf2_physname (NULL, target_die, target_cu);
11393 if (target_physname == NULL)
11394 complaint (&symfile_complaints,
11395 _("DW_AT_GNU_call_site_target target DIE has invalid "
11396 "physname, for referencing DIE 0x%x [in module %s]"),
11397 die->offset.sect_off, objfile_name (objfile));
11399 SET_FIELD_PHYSNAME (call_site->target, target_physname);
11405 /* DW_AT_entry_pc should be preferred. */
11406 if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL))
11407 complaint (&symfile_complaints,
11408 _("DW_AT_GNU_call_site_target target DIE has invalid "
11409 "low pc, for referencing DIE 0x%x [in module %s]"),
11410 die->offset.sect_off, objfile_name (objfile));
11412 SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr);
11416 complaint (&symfile_complaints,
11417 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11418 "block nor reference, for DIE 0x%x [in module %s]"),
11419 die->offset.sect_off, objfile_name (objfile));
11421 call_site->per_cu = cu->per_cu;
11423 for (child_die = die->child;
11424 child_die && child_die->tag;
11425 child_die = sibling_die (child_die))
11427 struct call_site_parameter *parameter;
11428 struct attribute *loc, *origin;
11430 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
11432 /* Already printed the complaint above. */
11436 gdb_assert (call_site->parameter_count < nparams);
11437 parameter = &call_site->parameter[call_site->parameter_count];
11439 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11440 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11441 register is contained in DW_AT_GNU_call_site_value. */
11443 loc = dwarf2_attr (child_die, DW_AT_location, cu);
11444 origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
11445 if (loc == NULL && origin != NULL && attr_form_is_ref (origin))
11447 sect_offset offset;
11449 parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET;
11450 offset = dwarf2_get_ref_die_offset (origin);
11451 if (!offset_in_cu_p (&cu->header, offset))
11453 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11454 binding can be done only inside one CU. Such referenced DIE
11455 therefore cannot be even moved to DW_TAG_partial_unit. */
11456 complaint (&symfile_complaints,
11457 _("DW_AT_abstract_origin offset is not in CU for "
11458 "DW_TAG_GNU_call_site child DIE 0x%x "
11460 child_die->offset.sect_off, objfile_name (objfile));
11463 parameter->u.param_offset.cu_off = (offset.sect_off
11464 - cu->header.offset.sect_off);
11466 else if (loc == NULL || origin != NULL || !attr_form_is_block (loc))
11468 complaint (&symfile_complaints,
11469 _("No DW_FORM_block* DW_AT_location for "
11470 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11471 child_die->offset.sect_off, objfile_name (objfile));
11476 parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg
11477 (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]);
11478 if (parameter->u.dwarf_reg != -1)
11479 parameter->kind = CALL_SITE_PARAMETER_DWARF_REG;
11480 else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data,
11481 &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size],
11482 ¶meter->u.fb_offset))
11483 parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET;
11486 complaint (&symfile_complaints,
11487 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11488 "for DW_FORM_block* DW_AT_location is supported for "
11489 "DW_TAG_GNU_call_site child DIE 0x%x "
11491 child_die->offset.sect_off, objfile_name (objfile));
11496 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu);
11497 if (!attr_form_is_block (attr))
11499 complaint (&symfile_complaints,
11500 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11501 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11502 child_die->offset.sect_off, objfile_name (objfile));
11505 parameter->value = DW_BLOCK (attr)->data;
11506 parameter->value_size = DW_BLOCK (attr)->size;
11508 /* Parameters are not pre-cleared by memset above. */
11509 parameter->data_value = NULL;
11510 parameter->data_value_size = 0;
11511 call_site->parameter_count++;
11513 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu);
11516 if (!attr_form_is_block (attr))
11517 complaint (&symfile_complaints,
11518 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11519 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11520 child_die->offset.sect_off, objfile_name (objfile));
11523 parameter->data_value = DW_BLOCK (attr)->data;
11524 parameter->data_value_size = DW_BLOCK (attr)->size;
11530 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11531 Return 1 if the attributes are present and valid, otherwise, return 0.
11532 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11535 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
11536 CORE_ADDR *high_return, struct dwarf2_cu *cu,
11537 struct partial_symtab *ranges_pst)
11539 struct objfile *objfile = cu->objfile;
11540 struct comp_unit_head *cu_header = &cu->header;
11541 bfd *obfd = objfile->obfd;
11542 unsigned int addr_size = cu_header->addr_size;
11543 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
11544 /* Base address selection entry. */
11547 unsigned int dummy;
11548 const gdb_byte *buffer;
11552 CORE_ADDR high = 0;
11553 CORE_ADDR baseaddr;
11555 found_base = cu->base_known;
11556 base = cu->base_address;
11558 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
11559 if (offset >= dwarf2_per_objfile->ranges.size)
11561 complaint (&symfile_complaints,
11562 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11566 buffer = dwarf2_per_objfile->ranges.buffer + offset;
11568 /* Read in the largest possible address. */
11569 marker = read_address (obfd, buffer, cu, &dummy);
11570 if ((marker & mask) == mask)
11572 /* If we found the largest possible address, then
11573 read the base address. */
11574 base = read_address (obfd, buffer + addr_size, cu, &dummy);
11575 buffer += 2 * addr_size;
11576 offset += 2 * addr_size;
11582 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
11586 CORE_ADDR range_beginning, range_end;
11588 range_beginning = read_address (obfd, buffer, cu, &dummy);
11589 buffer += addr_size;
11590 range_end = read_address (obfd, buffer, cu, &dummy);
11591 buffer += addr_size;
11592 offset += 2 * addr_size;
11594 /* An end of list marker is a pair of zero addresses. */
11595 if (range_beginning == 0 && range_end == 0)
11596 /* Found the end of list entry. */
11599 /* Each base address selection entry is a pair of 2 values.
11600 The first is the largest possible address, the second is
11601 the base address. Check for a base address here. */
11602 if ((range_beginning & mask) == mask)
11604 /* If we found the largest possible address, then
11605 read the base address. */
11606 base = read_address (obfd, buffer + addr_size, cu, &dummy);
11613 /* We have no valid base address for the ranges
11615 complaint (&symfile_complaints,
11616 _("Invalid .debug_ranges data (no base address)"));
11620 if (range_beginning > range_end)
11622 /* Inverted range entries are invalid. */
11623 complaint (&symfile_complaints,
11624 _("Invalid .debug_ranges data (inverted range)"));
11628 /* Empty range entries have no effect. */
11629 if (range_beginning == range_end)
11632 range_beginning += base;
11635 /* A not-uncommon case of bad debug info.
11636 Don't pollute the addrmap with bad data. */
11637 if (range_beginning + baseaddr == 0
11638 && !dwarf2_per_objfile->has_section_at_zero)
11640 complaint (&symfile_complaints,
11641 _(".debug_ranges entry has start address of zero"
11642 " [in module %s]"), objfile_name (objfile));
11646 if (ranges_pst != NULL)
11647 addrmap_set_empty (objfile->psymtabs_addrmap,
11648 range_beginning + baseaddr,
11649 range_end - 1 + baseaddr,
11652 /* FIXME: This is recording everything as a low-high
11653 segment of consecutive addresses. We should have a
11654 data structure for discontiguous block ranges
11658 low = range_beginning;
11664 if (range_beginning < low)
11665 low = range_beginning;
11666 if (range_end > high)
11672 /* If the first entry is an end-of-list marker, the range
11673 describes an empty scope, i.e. no instructions. */
11679 *high_return = high;
11683 /* Get low and high pc attributes from a die. Return 1 if the attributes
11684 are present and valid, otherwise, return 0. Return -1 if the range is
11685 discontinuous, i.e. derived from DW_AT_ranges information. */
11688 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
11689 CORE_ADDR *highpc, struct dwarf2_cu *cu,
11690 struct partial_symtab *pst)
11692 struct attribute *attr;
11693 struct attribute *attr_high;
11695 CORE_ADDR high = 0;
11698 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
11701 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
11704 low = DW_ADDR (attr);
11705 if (attr_high->form == DW_FORM_addr
11706 || attr_high->form == DW_FORM_GNU_addr_index)
11707 high = DW_ADDR (attr_high);
11709 high = low + DW_UNSND (attr_high);
11712 /* Found high w/o low attribute. */
11715 /* Found consecutive range of addresses. */
11720 attr = dwarf2_attr (die, DW_AT_ranges, cu);
11723 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11724 We take advantage of the fact that DW_AT_ranges does not appear
11725 in DW_TAG_compile_unit of DWO files. */
11726 int need_ranges_base = die->tag != DW_TAG_compile_unit;
11727 unsigned int ranges_offset = (DW_UNSND (attr)
11728 + (need_ranges_base
11732 /* Value of the DW_AT_ranges attribute is the offset in the
11733 .debug_ranges section. */
11734 if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst))
11736 /* Found discontinuous range of addresses. */
11741 /* read_partial_die has also the strict LOW < HIGH requirement. */
11745 /* When using the GNU linker, .gnu.linkonce. sections are used to
11746 eliminate duplicate copies of functions and vtables and such.
11747 The linker will arbitrarily choose one and discard the others.
11748 The AT_*_pc values for such functions refer to local labels in
11749 these sections. If the section from that file was discarded, the
11750 labels are not in the output, so the relocs get a value of 0.
11751 If this is a discarded function, mark the pc bounds as invalid,
11752 so that GDB will ignore it. */
11753 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
11762 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
11763 its low and high PC addresses. Do nothing if these addresses could not
11764 be determined. Otherwise, set LOWPC to the low address if it is smaller,
11765 and HIGHPC to the high address if greater than HIGHPC. */
11768 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
11769 CORE_ADDR *lowpc, CORE_ADDR *highpc,
11770 struct dwarf2_cu *cu)
11772 CORE_ADDR low, high;
11773 struct die_info *child = die->child;
11775 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
11777 *lowpc = min (*lowpc, low);
11778 *highpc = max (*highpc, high);
11781 /* If the language does not allow nested subprograms (either inside
11782 subprograms or lexical blocks), we're done. */
11783 if (cu->language != language_ada)
11786 /* Check all the children of the given DIE. If it contains nested
11787 subprograms, then check their pc bounds. Likewise, we need to
11788 check lexical blocks as well, as they may also contain subprogram
11790 while (child && child->tag)
11792 if (child->tag == DW_TAG_subprogram
11793 || child->tag == DW_TAG_lexical_block)
11794 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
11795 child = sibling_die (child);
11799 /* Get the low and high pc's represented by the scope DIE, and store
11800 them in *LOWPC and *HIGHPC. If the correct values can't be
11801 determined, set *LOWPC to -1 and *HIGHPC to 0. */
11804 get_scope_pc_bounds (struct die_info *die,
11805 CORE_ADDR *lowpc, CORE_ADDR *highpc,
11806 struct dwarf2_cu *cu)
11808 CORE_ADDR best_low = (CORE_ADDR) -1;
11809 CORE_ADDR best_high = (CORE_ADDR) 0;
11810 CORE_ADDR current_low, current_high;
11812 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
11814 best_low = current_low;
11815 best_high = current_high;
11819 struct die_info *child = die->child;
11821 while (child && child->tag)
11823 switch (child->tag) {
11824 case DW_TAG_subprogram:
11825 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
11827 case DW_TAG_namespace:
11828 case DW_TAG_module:
11829 /* FIXME: carlton/2004-01-16: Should we do this for
11830 DW_TAG_class_type/DW_TAG_structure_type, too? I think
11831 that current GCC's always emit the DIEs corresponding
11832 to definitions of methods of classes as children of a
11833 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
11834 the DIEs giving the declarations, which could be
11835 anywhere). But I don't see any reason why the
11836 standards says that they have to be there. */
11837 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
11839 if (current_low != ((CORE_ADDR) -1))
11841 best_low = min (best_low, current_low);
11842 best_high = max (best_high, current_high);
11850 child = sibling_die (child);
11855 *highpc = best_high;
11858 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
11862 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
11863 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
11865 struct objfile *objfile = cu->objfile;
11866 struct attribute *attr;
11867 struct attribute *attr_high;
11869 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
11872 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
11875 CORE_ADDR low = DW_ADDR (attr);
11877 if (attr_high->form == DW_FORM_addr
11878 || attr_high->form == DW_FORM_GNU_addr_index)
11879 high = DW_ADDR (attr_high);
11881 high = low + DW_UNSND (attr_high);
11883 record_block_range (block, baseaddr + low, baseaddr + high - 1);
11887 attr = dwarf2_attr (die, DW_AT_ranges, cu);
11890 bfd *obfd = objfile->obfd;
11891 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11892 We take advantage of the fact that DW_AT_ranges does not appear
11893 in DW_TAG_compile_unit of DWO files. */
11894 int need_ranges_base = die->tag != DW_TAG_compile_unit;
11896 /* The value of the DW_AT_ranges attribute is the offset of the
11897 address range list in the .debug_ranges section. */
11898 unsigned long offset = (DW_UNSND (attr)
11899 + (need_ranges_base ? cu->ranges_base : 0));
11900 const gdb_byte *buffer;
11902 /* For some target architectures, but not others, the
11903 read_address function sign-extends the addresses it returns.
11904 To recognize base address selection entries, we need a
11906 unsigned int addr_size = cu->header.addr_size;
11907 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
11909 /* The base address, to which the next pair is relative. Note
11910 that this 'base' is a DWARF concept: most entries in a range
11911 list are relative, to reduce the number of relocs against the
11912 debugging information. This is separate from this function's
11913 'baseaddr' argument, which GDB uses to relocate debugging
11914 information from a shared library based on the address at
11915 which the library was loaded. */
11916 CORE_ADDR base = cu->base_address;
11917 int base_known = cu->base_known;
11919 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
11920 if (offset >= dwarf2_per_objfile->ranges.size)
11922 complaint (&symfile_complaints,
11923 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
11927 buffer = dwarf2_per_objfile->ranges.buffer + offset;
11931 unsigned int bytes_read;
11932 CORE_ADDR start, end;
11934 start = read_address (obfd, buffer, cu, &bytes_read);
11935 buffer += bytes_read;
11936 end = read_address (obfd, buffer, cu, &bytes_read);
11937 buffer += bytes_read;
11939 /* Did we find the end of the range list? */
11940 if (start == 0 && end == 0)
11943 /* Did we find a base address selection entry? */
11944 else if ((start & base_select_mask) == base_select_mask)
11950 /* We found an ordinary address range. */
11955 complaint (&symfile_complaints,
11956 _("Invalid .debug_ranges data "
11957 "(no base address)"));
11963 /* Inverted range entries are invalid. */
11964 complaint (&symfile_complaints,
11965 _("Invalid .debug_ranges data "
11966 "(inverted range)"));
11970 /* Empty range entries have no effect. */
11974 start += base + baseaddr;
11975 end += base + baseaddr;
11977 /* A not-uncommon case of bad debug info.
11978 Don't pollute the addrmap with bad data. */
11979 if (start == 0 && !dwarf2_per_objfile->has_section_at_zero)
11981 complaint (&symfile_complaints,
11982 _(".debug_ranges entry has start address of zero"
11983 " [in module %s]"), objfile_name (objfile));
11987 record_block_range (block, start, end - 1);
11993 /* Check whether the producer field indicates either of GCC < 4.6, or the
11994 Intel C/C++ compiler, and cache the result in CU. */
11997 check_producer (struct dwarf2_cu *cu)
12000 int major, minor, release;
12002 if (cu->producer == NULL)
12004 /* For unknown compilers expect their behavior is DWARF version
12007 GCC started to support .debug_types sections by -gdwarf-4 since
12008 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12009 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12010 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12011 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12013 else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0)
12015 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
12017 cs = &cu->producer[strlen ("GNU ")];
12018 while (*cs && !isdigit (*cs))
12020 if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3)
12022 /* Not recognized as GCC. */
12026 cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6);
12027 cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3);
12030 else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0)
12031 cu->producer_is_icc = 1;
12034 /* For other non-GCC compilers, expect their behavior is DWARF version
12038 cu->checked_producer = 1;
12041 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12042 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12043 during 4.6.0 experimental. */
12046 producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu)
12048 if (!cu->checked_producer)
12049 check_producer (cu);
12051 return cu->producer_is_gxx_lt_4_6;
12054 /* Return the default accessibility type if it is not overriden by
12055 DW_AT_accessibility. */
12057 static enum dwarf_access_attribute
12058 dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu)
12060 if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu))
12062 /* The default DWARF 2 accessibility for members is public, the default
12063 accessibility for inheritance is private. */
12065 if (die->tag != DW_TAG_inheritance)
12066 return DW_ACCESS_public;
12068 return DW_ACCESS_private;
12072 /* DWARF 3+ defines the default accessibility a different way. The same
12073 rules apply now for DW_TAG_inheritance as for the members and it only
12074 depends on the container kind. */
12076 if (die->parent->tag == DW_TAG_class_type)
12077 return DW_ACCESS_private;
12079 return DW_ACCESS_public;
12083 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12084 offset. If the attribute was not found return 0, otherwise return
12085 1. If it was found but could not properly be handled, set *OFFSET
12089 handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu,
12092 struct attribute *attr;
12094 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
12099 /* Note that we do not check for a section offset first here.
12100 This is because DW_AT_data_member_location is new in DWARF 4,
12101 so if we see it, we can assume that a constant form is really
12102 a constant and not a section offset. */
12103 if (attr_form_is_constant (attr))
12104 *offset = dwarf2_get_attr_constant_value (attr, 0);
12105 else if (attr_form_is_section_offset (attr))
12106 dwarf2_complex_location_expr_complaint ();
12107 else if (attr_form_is_block (attr))
12108 *offset = decode_locdesc (DW_BLOCK (attr), cu);
12110 dwarf2_complex_location_expr_complaint ();
12118 /* Add an aggregate field to the field list. */
12121 dwarf2_add_field (struct field_info *fip, struct die_info *die,
12122 struct dwarf2_cu *cu)
12124 struct objfile *objfile = cu->objfile;
12125 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12126 struct nextfield *new_field;
12127 struct attribute *attr;
12129 const char *fieldname = "";
12131 /* Allocate a new field list entry and link it in. */
12132 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
12133 make_cleanup (xfree, new_field);
12134 memset (new_field, 0, sizeof (struct nextfield));
12136 if (die->tag == DW_TAG_inheritance)
12138 new_field->next = fip->baseclasses;
12139 fip->baseclasses = new_field;
12143 new_field->next = fip->fields;
12144 fip->fields = new_field;
12148 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
12150 new_field->accessibility = DW_UNSND (attr);
12152 new_field->accessibility = dwarf2_default_access_attribute (die, cu);
12153 if (new_field->accessibility != DW_ACCESS_public)
12154 fip->non_public_fields = 1;
12156 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
12158 new_field->virtuality = DW_UNSND (attr);
12160 new_field->virtuality = DW_VIRTUALITY_none;
12162 fp = &new_field->field;
12164 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
12168 /* Data member other than a C++ static data member. */
12170 /* Get type of field. */
12171 fp->type = die_type (die, cu);
12173 SET_FIELD_BITPOS (*fp, 0);
12175 /* Get bit size of field (zero if none). */
12176 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
12179 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
12183 FIELD_BITSIZE (*fp) = 0;
12186 /* Get bit offset of field. */
12187 if (handle_data_member_location (die, cu, &offset))
12188 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
12189 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
12192 if (gdbarch_bits_big_endian (gdbarch))
12194 /* For big endian bits, the DW_AT_bit_offset gives the
12195 additional bit offset from the MSB of the containing
12196 anonymous object to the MSB of the field. We don't
12197 have to do anything special since we don't need to
12198 know the size of the anonymous object. */
12199 SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr));
12203 /* For little endian bits, compute the bit offset to the
12204 MSB of the anonymous object, subtract off the number of
12205 bits from the MSB of the field to the MSB of the
12206 object, and then subtract off the number of bits of
12207 the field itself. The result is the bit offset of
12208 the LSB of the field. */
12209 int anonymous_size;
12210 int bit_offset = DW_UNSND (attr);
12212 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12215 /* The size of the anonymous object containing
12216 the bit field is explicit, so use the
12217 indicated size (in bytes). */
12218 anonymous_size = DW_UNSND (attr);
12222 /* The size of the anonymous object containing
12223 the bit field must be inferred from the type
12224 attribute of the data member containing the
12226 anonymous_size = TYPE_LENGTH (fp->type);
12228 SET_FIELD_BITPOS (*fp,
12229 (FIELD_BITPOS (*fp)
12230 + anonymous_size * bits_per_byte
12231 - bit_offset - FIELD_BITSIZE (*fp)));
12235 /* Get name of field. */
12236 fieldname = dwarf2_name (die, cu);
12237 if (fieldname == NULL)
12240 /* The name is already allocated along with this objfile, so we don't
12241 need to duplicate it for the type. */
12242 fp->name = fieldname;
12244 /* Change accessibility for artificial fields (e.g. virtual table
12245 pointer or virtual base class pointer) to private. */
12246 if (dwarf2_attr (die, DW_AT_artificial, cu))
12248 FIELD_ARTIFICIAL (*fp) = 1;
12249 new_field->accessibility = DW_ACCESS_private;
12250 fip->non_public_fields = 1;
12253 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
12255 /* C++ static member. */
12257 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12258 is a declaration, but all versions of G++ as of this writing
12259 (so through at least 3.2.1) incorrectly generate
12260 DW_TAG_variable tags. */
12262 const char *physname;
12264 /* Get name of field. */
12265 fieldname = dwarf2_name (die, cu);
12266 if (fieldname == NULL)
12269 attr = dwarf2_attr (die, DW_AT_const_value, cu);
12271 /* Only create a symbol if this is an external value.
12272 new_symbol checks this and puts the value in the global symbol
12273 table, which we want. If it is not external, new_symbol
12274 will try to put the value in cu->list_in_scope which is wrong. */
12275 && dwarf2_flag_true_p (die, DW_AT_external, cu))
12277 /* A static const member, not much different than an enum as far as
12278 we're concerned, except that we can support more types. */
12279 new_symbol (die, NULL, cu);
12282 /* Get physical name. */
12283 physname = dwarf2_physname (fieldname, die, cu);
12285 /* The name is already allocated along with this objfile, so we don't
12286 need to duplicate it for the type. */
12287 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
12288 FIELD_TYPE (*fp) = die_type (die, cu);
12289 FIELD_NAME (*fp) = fieldname;
12291 else if (die->tag == DW_TAG_inheritance)
12295 /* C++ base class field. */
12296 if (handle_data_member_location (die, cu, &offset))
12297 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
12298 FIELD_BITSIZE (*fp) = 0;
12299 FIELD_TYPE (*fp) = die_type (die, cu);
12300 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
12301 fip->nbaseclasses++;
12305 /* Add a typedef defined in the scope of the FIP's class. */
12308 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
12309 struct dwarf2_cu *cu)
12311 struct objfile *objfile = cu->objfile;
12312 struct typedef_field_list *new_field;
12313 struct attribute *attr;
12314 struct typedef_field *fp;
12315 char *fieldname = "";
12317 /* Allocate a new field list entry and link it in. */
12318 new_field = xzalloc (sizeof (*new_field));
12319 make_cleanup (xfree, new_field);
12321 gdb_assert (die->tag == DW_TAG_typedef);
12323 fp = &new_field->field;
12325 /* Get name of field. */
12326 fp->name = dwarf2_name (die, cu);
12327 if (fp->name == NULL)
12330 fp->type = read_type_die (die, cu);
12332 new_field->next = fip->typedef_field_list;
12333 fip->typedef_field_list = new_field;
12334 fip->typedef_field_list_count++;
12337 /* Create the vector of fields, and attach it to the type. */
12340 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
12341 struct dwarf2_cu *cu)
12343 int nfields = fip->nfields;
12345 /* Record the field count, allocate space for the array of fields,
12346 and create blank accessibility bitfields if necessary. */
12347 TYPE_NFIELDS (type) = nfields;
12348 TYPE_FIELDS (type) = (struct field *)
12349 TYPE_ALLOC (type, sizeof (struct field) * nfields);
12350 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
12352 if (fip->non_public_fields && cu->language != language_ada)
12354 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12356 TYPE_FIELD_PRIVATE_BITS (type) =
12357 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
12358 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
12360 TYPE_FIELD_PROTECTED_BITS (type) =
12361 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
12362 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
12364 TYPE_FIELD_IGNORE_BITS (type) =
12365 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
12366 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
12369 /* If the type has baseclasses, allocate and clear a bit vector for
12370 TYPE_FIELD_VIRTUAL_BITS. */
12371 if (fip->nbaseclasses && cu->language != language_ada)
12373 int num_bytes = B_BYTES (fip->nbaseclasses);
12374 unsigned char *pointer;
12376 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12377 pointer = TYPE_ALLOC (type, num_bytes);
12378 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
12379 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
12380 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
12383 /* Copy the saved-up fields into the field vector. Start from the head of
12384 the list, adding to the tail of the field array, so that they end up in
12385 the same order in the array in which they were added to the list. */
12386 while (nfields-- > 0)
12388 struct nextfield *fieldp;
12392 fieldp = fip->fields;
12393 fip->fields = fieldp->next;
12397 fieldp = fip->baseclasses;
12398 fip->baseclasses = fieldp->next;
12401 TYPE_FIELD (type, nfields) = fieldp->field;
12402 switch (fieldp->accessibility)
12404 case DW_ACCESS_private:
12405 if (cu->language != language_ada)
12406 SET_TYPE_FIELD_PRIVATE (type, nfields);
12409 case DW_ACCESS_protected:
12410 if (cu->language != language_ada)
12411 SET_TYPE_FIELD_PROTECTED (type, nfields);
12414 case DW_ACCESS_public:
12418 /* Unknown accessibility. Complain and treat it as public. */
12420 complaint (&symfile_complaints, _("unsupported accessibility %d"),
12421 fieldp->accessibility);
12425 if (nfields < fip->nbaseclasses)
12427 switch (fieldp->virtuality)
12429 case DW_VIRTUALITY_virtual:
12430 case DW_VIRTUALITY_pure_virtual:
12431 if (cu->language == language_ada)
12432 error (_("unexpected virtuality in component of Ada type"));
12433 SET_TYPE_FIELD_VIRTUAL (type, nfields);
12440 /* Return true if this member function is a constructor, false
12444 dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu)
12446 const char *fieldname;
12447 const char *typename;
12450 if (die->parent == NULL)
12453 if (die->parent->tag != DW_TAG_structure_type
12454 && die->parent->tag != DW_TAG_union_type
12455 && die->parent->tag != DW_TAG_class_type)
12458 fieldname = dwarf2_name (die, cu);
12459 typename = dwarf2_name (die->parent, cu);
12460 if (fieldname == NULL || typename == NULL)
12463 len = strlen (fieldname);
12464 return (strncmp (fieldname, typename, len) == 0
12465 && (typename[len] == '\0' || typename[len] == '<'));
12468 /* Add a member function to the proper fieldlist. */
12471 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
12472 struct type *type, struct dwarf2_cu *cu)
12474 struct objfile *objfile = cu->objfile;
12475 struct attribute *attr;
12476 struct fnfieldlist *flp;
12478 struct fn_field *fnp;
12479 const char *fieldname;
12480 struct nextfnfield *new_fnfield;
12481 struct type *this_type;
12482 enum dwarf_access_attribute accessibility;
12484 if (cu->language == language_ada)
12485 error (_("unexpected member function in Ada type"));
12487 /* Get name of member function. */
12488 fieldname = dwarf2_name (die, cu);
12489 if (fieldname == NULL)
12492 /* Look up member function name in fieldlist. */
12493 for (i = 0; i < fip->nfnfields; i++)
12495 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
12499 /* Create new list element if necessary. */
12500 if (i < fip->nfnfields)
12501 flp = &fip->fnfieldlists[i];
12504 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
12506 fip->fnfieldlists = (struct fnfieldlist *)
12507 xrealloc (fip->fnfieldlists,
12508 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
12509 * sizeof (struct fnfieldlist));
12510 if (fip->nfnfields == 0)
12511 make_cleanup (free_current_contents, &fip->fnfieldlists);
12513 flp = &fip->fnfieldlists[fip->nfnfields];
12514 flp->name = fieldname;
12517 i = fip->nfnfields++;
12520 /* Create a new member function field and chain it to the field list
12522 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
12523 make_cleanup (xfree, new_fnfield);
12524 memset (new_fnfield, 0, sizeof (struct nextfnfield));
12525 new_fnfield->next = flp->head;
12526 flp->head = new_fnfield;
12529 /* Fill in the member function field info. */
12530 fnp = &new_fnfield->fnfield;
12532 /* Delay processing of the physname until later. */
12533 if (cu->language == language_cplus || cu->language == language_java)
12535 add_to_method_list (type, i, flp->length - 1, fieldname,
12540 const char *physname = dwarf2_physname (fieldname, die, cu);
12541 fnp->physname = physname ? physname : "";
12544 fnp->type = alloc_type (objfile);
12545 this_type = read_type_die (die, cu);
12546 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
12548 int nparams = TYPE_NFIELDS (this_type);
12550 /* TYPE is the domain of this method, and THIS_TYPE is the type
12551 of the method itself (TYPE_CODE_METHOD). */
12552 smash_to_method_type (fnp->type, type,
12553 TYPE_TARGET_TYPE (this_type),
12554 TYPE_FIELDS (this_type),
12555 TYPE_NFIELDS (this_type),
12556 TYPE_VARARGS (this_type));
12558 /* Handle static member functions.
12559 Dwarf2 has no clean way to discern C++ static and non-static
12560 member functions. G++ helps GDB by marking the first
12561 parameter for non-static member functions (which is the this
12562 pointer) as artificial. We obtain this information from
12563 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12564 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
12565 fnp->voffset = VOFFSET_STATIC;
12568 complaint (&symfile_complaints, _("member function type missing for '%s'"),
12569 dwarf2_full_name (fieldname, die, cu));
12571 /* Get fcontext from DW_AT_containing_type if present. */
12572 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
12573 fnp->fcontext = die_containing_type (die, cu);
12575 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12576 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12578 /* Get accessibility. */
12579 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
12581 accessibility = DW_UNSND (attr);
12583 accessibility = dwarf2_default_access_attribute (die, cu);
12584 switch (accessibility)
12586 case DW_ACCESS_private:
12587 fnp->is_private = 1;
12589 case DW_ACCESS_protected:
12590 fnp->is_protected = 1;
12594 /* Check for artificial methods. */
12595 attr = dwarf2_attr (die, DW_AT_artificial, cu);
12596 if (attr && DW_UNSND (attr) != 0)
12597 fnp->is_artificial = 1;
12599 fnp->is_constructor = dwarf2_is_constructor (die, cu);
12601 /* Get index in virtual function table if it is a virtual member
12602 function. For older versions of GCC, this is an offset in the
12603 appropriate virtual table, as specified by DW_AT_containing_type.
12604 For everyone else, it is an expression to be evaluated relative
12605 to the object address. */
12607 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
12610 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
12612 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
12614 /* Old-style GCC. */
12615 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
12617 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
12618 || (DW_BLOCK (attr)->size > 1
12619 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
12620 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
12622 struct dwarf_block blk;
12625 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
12627 blk.size = DW_BLOCK (attr)->size - offset;
12628 blk.data = DW_BLOCK (attr)->data + offset;
12629 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
12630 if ((fnp->voffset % cu->header.addr_size) != 0)
12631 dwarf2_complex_location_expr_complaint ();
12633 fnp->voffset /= cu->header.addr_size;
12637 dwarf2_complex_location_expr_complaint ();
12639 if (!fnp->fcontext)
12640 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
12642 else if (attr_form_is_section_offset (attr))
12644 dwarf2_complex_location_expr_complaint ();
12648 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12654 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
12655 if (attr && DW_UNSND (attr))
12657 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12658 complaint (&symfile_complaints,
12659 _("Member function \"%s\" (offset %d) is virtual "
12660 "but the vtable offset is not specified"),
12661 fieldname, die->offset.sect_off);
12662 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12663 TYPE_CPLUS_DYNAMIC (type) = 1;
12668 /* Create the vector of member function fields, and attach it to the type. */
12671 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
12672 struct dwarf2_cu *cu)
12674 struct fnfieldlist *flp;
12677 if (cu->language == language_ada)
12678 error (_("unexpected member functions in Ada type"));
12680 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12681 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
12682 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
12684 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
12686 struct nextfnfield *nfp = flp->head;
12687 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
12690 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
12691 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
12692 fn_flp->fn_fields = (struct fn_field *)
12693 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
12694 for (k = flp->length; (k--, nfp); nfp = nfp->next)
12695 fn_flp->fn_fields[k] = nfp->fnfield;
12698 TYPE_NFN_FIELDS (type) = fip->nfnfields;
12701 /* Returns non-zero if NAME is the name of a vtable member in CU's
12702 language, zero otherwise. */
12704 is_vtable_name (const char *name, struct dwarf2_cu *cu)
12706 static const char vptr[] = "_vptr";
12707 static const char vtable[] = "vtable";
12709 /* Look for the C++ and Java forms of the vtable. */
12710 if ((cu->language == language_java
12711 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
12712 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
12713 && is_cplus_marker (name[sizeof (vptr) - 1])))
12719 /* GCC outputs unnamed structures that are really pointers to member
12720 functions, with the ABI-specified layout. If TYPE describes
12721 such a structure, smash it into a member function type.
12723 GCC shouldn't do this; it should just output pointer to member DIEs.
12724 This is GCC PR debug/28767. */
12727 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
12729 struct type *pfn_type, *domain_type, *new_type;
12731 /* Check for a structure with no name and two children. */
12732 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
12735 /* Check for __pfn and __delta members. */
12736 if (TYPE_FIELD_NAME (type, 0) == NULL
12737 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
12738 || TYPE_FIELD_NAME (type, 1) == NULL
12739 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
12742 /* Find the type of the method. */
12743 pfn_type = TYPE_FIELD_TYPE (type, 0);
12744 if (pfn_type == NULL
12745 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
12746 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
12749 /* Look for the "this" argument. */
12750 pfn_type = TYPE_TARGET_TYPE (pfn_type);
12751 if (TYPE_NFIELDS (pfn_type) == 0
12752 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
12753 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
12756 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
12757 new_type = alloc_type (objfile);
12758 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
12759 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
12760 TYPE_VARARGS (pfn_type));
12761 smash_to_methodptr_type (type, new_type);
12764 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
12768 producer_is_icc (struct dwarf2_cu *cu)
12770 if (!cu->checked_producer)
12771 check_producer (cu);
12773 return cu->producer_is_icc;
12776 /* Called when we find the DIE that starts a structure or union scope
12777 (definition) to create a type for the structure or union. Fill in
12778 the type's name and general properties; the members will not be
12779 processed until process_structure_scope.
12781 NOTE: we need to call these functions regardless of whether or not the
12782 DIE has a DW_AT_name attribute, since it might be an anonymous
12783 structure or union. This gets the type entered into our set of
12784 user defined types.
12786 However, if the structure is incomplete (an opaque struct/union)
12787 then suppress creating a symbol table entry for it since gdb only
12788 wants to find the one with the complete definition. Note that if
12789 it is complete, we just call new_symbol, which does it's own
12790 checking about whether the struct/union is anonymous or not (and
12791 suppresses creating a symbol table entry itself). */
12793 static struct type *
12794 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
12796 struct objfile *objfile = cu->objfile;
12798 struct attribute *attr;
12801 /* If the definition of this type lives in .debug_types, read that type.
12802 Don't follow DW_AT_specification though, that will take us back up
12803 the chain and we want to go down. */
12804 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
12807 type = get_DW_AT_signature_type (die, attr, cu);
12809 /* The type's CU may not be the same as CU.
12810 Ensure TYPE is recorded with CU in die_type_hash. */
12811 return set_die_type (die, type, cu);
12814 type = alloc_type (objfile);
12815 INIT_CPLUS_SPECIFIC (type);
12817 name = dwarf2_name (die, cu);
12820 if (cu->language == language_cplus
12821 || cu->language == language_java)
12823 const char *full_name = dwarf2_full_name (name, die, cu);
12825 /* dwarf2_full_name might have already finished building the DIE's
12826 type. If so, there is no need to continue. */
12827 if (get_die_type (die, cu) != NULL)
12828 return get_die_type (die, cu);
12830 TYPE_TAG_NAME (type) = full_name;
12831 if (die->tag == DW_TAG_structure_type
12832 || die->tag == DW_TAG_class_type)
12833 TYPE_NAME (type) = TYPE_TAG_NAME (type);
12837 /* The name is already allocated along with this objfile, so
12838 we don't need to duplicate it for the type. */
12839 TYPE_TAG_NAME (type) = name;
12840 if (die->tag == DW_TAG_class_type)
12841 TYPE_NAME (type) = TYPE_TAG_NAME (type);
12845 if (die->tag == DW_TAG_structure_type)
12847 TYPE_CODE (type) = TYPE_CODE_STRUCT;
12849 else if (die->tag == DW_TAG_union_type)
12851 TYPE_CODE (type) = TYPE_CODE_UNION;
12855 TYPE_CODE (type) = TYPE_CODE_CLASS;
12858 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
12859 TYPE_DECLARED_CLASS (type) = 1;
12861 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12864 TYPE_LENGTH (type) = DW_UNSND (attr);
12868 TYPE_LENGTH (type) = 0;
12871 if (producer_is_icc (cu))
12873 /* ICC does not output the required DW_AT_declaration
12874 on incomplete types, but gives them a size of zero. */
12877 TYPE_STUB_SUPPORTED (type) = 1;
12879 if (die_is_declaration (die, cu))
12880 TYPE_STUB (type) = 1;
12881 else if (attr == NULL && die->child == NULL
12882 && producer_is_realview (cu->producer))
12883 /* RealView does not output the required DW_AT_declaration
12884 on incomplete types. */
12885 TYPE_STUB (type) = 1;
12887 /* We need to add the type field to the die immediately so we don't
12888 infinitely recurse when dealing with pointers to the structure
12889 type within the structure itself. */
12890 set_die_type (die, type, cu);
12892 /* set_die_type should be already done. */
12893 set_descriptive_type (type, die, cu);
12898 /* Finish creating a structure or union type, including filling in
12899 its members and creating a symbol for it. */
12902 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
12904 struct objfile *objfile = cu->objfile;
12905 struct die_info *child_die = die->child;
12908 type = get_die_type (die, cu);
12910 type = read_structure_type (die, cu);
12912 if (die->child != NULL && ! die_is_declaration (die, cu))
12914 struct field_info fi;
12915 struct die_info *child_die;
12916 VEC (symbolp) *template_args = NULL;
12917 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
12919 memset (&fi, 0, sizeof (struct field_info));
12921 child_die = die->child;
12923 while (child_die && child_die->tag)
12925 if (child_die->tag == DW_TAG_member
12926 || child_die->tag == DW_TAG_variable)
12928 /* NOTE: carlton/2002-11-05: A C++ static data member
12929 should be a DW_TAG_member that is a declaration, but
12930 all versions of G++ as of this writing (so through at
12931 least 3.2.1) incorrectly generate DW_TAG_variable
12932 tags for them instead. */
12933 dwarf2_add_field (&fi, child_die, cu);
12935 else if (child_die->tag == DW_TAG_subprogram)
12937 /* C++ member function. */
12938 dwarf2_add_member_fn (&fi, child_die, type, cu);
12940 else if (child_die->tag == DW_TAG_inheritance)
12942 /* C++ base class field. */
12943 dwarf2_add_field (&fi, child_die, cu);
12945 else if (child_die->tag == DW_TAG_typedef)
12946 dwarf2_add_typedef (&fi, child_die, cu);
12947 else if (child_die->tag == DW_TAG_template_type_param
12948 || child_die->tag == DW_TAG_template_value_param)
12950 struct symbol *arg = new_symbol (child_die, NULL, cu);
12953 VEC_safe_push (symbolp, template_args, arg);
12956 child_die = sibling_die (child_die);
12959 /* Attach template arguments to type. */
12960 if (! VEC_empty (symbolp, template_args))
12962 ALLOCATE_CPLUS_STRUCT_TYPE (type);
12963 TYPE_N_TEMPLATE_ARGUMENTS (type)
12964 = VEC_length (symbolp, template_args);
12965 TYPE_TEMPLATE_ARGUMENTS (type)
12966 = obstack_alloc (&objfile->objfile_obstack,
12967 (TYPE_N_TEMPLATE_ARGUMENTS (type)
12968 * sizeof (struct symbol *)));
12969 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
12970 VEC_address (symbolp, template_args),
12971 (TYPE_N_TEMPLATE_ARGUMENTS (type)
12972 * sizeof (struct symbol *)));
12973 VEC_free (symbolp, template_args);
12976 /* Attach fields and member functions to the type. */
12978 dwarf2_attach_fields_to_type (&fi, type, cu);
12981 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
12983 /* Get the type which refers to the base class (possibly this
12984 class itself) which contains the vtable pointer for the current
12985 class from the DW_AT_containing_type attribute. This use of
12986 DW_AT_containing_type is a GNU extension. */
12988 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
12990 struct type *t = die_containing_type (die, cu);
12992 TYPE_VPTR_BASETYPE (type) = t;
12997 /* Our own class provides vtbl ptr. */
12998 for (i = TYPE_NFIELDS (t) - 1;
12999 i >= TYPE_N_BASECLASSES (t);
13002 const char *fieldname = TYPE_FIELD_NAME (t, i);
13004 if (is_vtable_name (fieldname, cu))
13006 TYPE_VPTR_FIELDNO (type) = i;
13011 /* Complain if virtual function table field not found. */
13012 if (i < TYPE_N_BASECLASSES (t))
13013 complaint (&symfile_complaints,
13014 _("virtual function table pointer "
13015 "not found when defining class '%s'"),
13016 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
13021 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
13024 else if (cu->producer
13025 && strncmp (cu->producer,
13026 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
13028 /* The IBM XLC compiler does not provide direct indication
13029 of the containing type, but the vtable pointer is
13030 always named __vfp. */
13034 for (i = TYPE_NFIELDS (type) - 1;
13035 i >= TYPE_N_BASECLASSES (type);
13038 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
13040 TYPE_VPTR_FIELDNO (type) = i;
13041 TYPE_VPTR_BASETYPE (type) = type;
13048 /* Copy fi.typedef_field_list linked list elements content into the
13049 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13050 if (fi.typedef_field_list)
13052 int i = fi.typedef_field_list_count;
13054 ALLOCATE_CPLUS_STRUCT_TYPE (type);
13055 TYPE_TYPEDEF_FIELD_ARRAY (type)
13056 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
13057 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
13059 /* Reverse the list order to keep the debug info elements order. */
13062 struct typedef_field *dest, *src;
13064 dest = &TYPE_TYPEDEF_FIELD (type, i);
13065 src = &fi.typedef_field_list->field;
13066 fi.typedef_field_list = fi.typedef_field_list->next;
13071 do_cleanups (back_to);
13073 if (HAVE_CPLUS_STRUCT (type))
13074 TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java;
13077 quirk_gcc_member_function_pointer (type, objfile);
13079 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13080 snapshots) has been known to create a die giving a declaration
13081 for a class that has, as a child, a die giving a definition for a
13082 nested class. So we have to process our children even if the
13083 current die is a declaration. Normally, of course, a declaration
13084 won't have any children at all. */
13086 while (child_die != NULL && child_die->tag)
13088 if (child_die->tag == DW_TAG_member
13089 || child_die->tag == DW_TAG_variable
13090 || child_die->tag == DW_TAG_inheritance
13091 || child_die->tag == DW_TAG_template_value_param
13092 || child_die->tag == DW_TAG_template_type_param)
13097 process_die (child_die, cu);
13099 child_die = sibling_die (child_die);
13102 /* Do not consider external references. According to the DWARF standard,
13103 these DIEs are identified by the fact that they have no byte_size
13104 attribute, and a declaration attribute. */
13105 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
13106 || !die_is_declaration (die, cu))
13107 new_symbol (die, type, cu);
13110 /* Given a DW_AT_enumeration_type die, set its type. We do not
13111 complete the type's fields yet, or create any symbols. */
13113 static struct type *
13114 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
13116 struct objfile *objfile = cu->objfile;
13118 struct attribute *attr;
13121 /* If the definition of this type lives in .debug_types, read that type.
13122 Don't follow DW_AT_specification though, that will take us back up
13123 the chain and we want to go down. */
13124 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
13127 type = get_DW_AT_signature_type (die, attr, cu);
13129 /* The type's CU may not be the same as CU.
13130 Ensure TYPE is recorded with CU in die_type_hash. */
13131 return set_die_type (die, type, cu);
13134 type = alloc_type (objfile);
13136 TYPE_CODE (type) = TYPE_CODE_ENUM;
13137 name = dwarf2_full_name (NULL, die, cu);
13139 TYPE_TAG_NAME (type) = name;
13141 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13144 TYPE_LENGTH (type) = DW_UNSND (attr);
13148 TYPE_LENGTH (type) = 0;
13151 /* The enumeration DIE can be incomplete. In Ada, any type can be
13152 declared as private in the package spec, and then defined only
13153 inside the package body. Such types are known as Taft Amendment
13154 Types. When another package uses such a type, an incomplete DIE
13155 may be generated by the compiler. */
13156 if (die_is_declaration (die, cu))
13157 TYPE_STUB (type) = 1;
13159 return set_die_type (die, type, cu);
13162 /* Given a pointer to a die which begins an enumeration, process all
13163 the dies that define the members of the enumeration, and create the
13164 symbol for the enumeration type.
13166 NOTE: We reverse the order of the element list. */
13169 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
13171 struct type *this_type;
13173 this_type = get_die_type (die, cu);
13174 if (this_type == NULL)
13175 this_type = read_enumeration_type (die, cu);
13177 if (die->child != NULL)
13179 struct die_info *child_die;
13180 struct symbol *sym;
13181 struct field *fields = NULL;
13182 int num_fields = 0;
13183 int unsigned_enum = 1;
13188 child_die = die->child;
13189 while (child_die && child_die->tag)
13191 if (child_die->tag != DW_TAG_enumerator)
13193 process_die (child_die, cu);
13197 name = dwarf2_name (child_die, cu);
13200 sym = new_symbol (child_die, this_type, cu);
13201 if (SYMBOL_VALUE (sym) < 0)
13206 else if ((mask & SYMBOL_VALUE (sym)) != 0)
13209 mask |= SYMBOL_VALUE (sym);
13211 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
13213 fields = (struct field *)
13215 (num_fields + DW_FIELD_ALLOC_CHUNK)
13216 * sizeof (struct field));
13219 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
13220 FIELD_TYPE (fields[num_fields]) = NULL;
13221 SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym));
13222 FIELD_BITSIZE (fields[num_fields]) = 0;
13228 child_die = sibling_die (child_die);
13233 TYPE_NFIELDS (this_type) = num_fields;
13234 TYPE_FIELDS (this_type) = (struct field *)
13235 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
13236 memcpy (TYPE_FIELDS (this_type), fields,
13237 sizeof (struct field) * num_fields);
13241 TYPE_UNSIGNED (this_type) = 1;
13243 TYPE_FLAG_ENUM (this_type) = 1;
13246 /* If we are reading an enum from a .debug_types unit, and the enum
13247 is a declaration, and the enum is not the signatured type in the
13248 unit, then we do not want to add a symbol for it. Adding a
13249 symbol would in some cases obscure the true definition of the
13250 enum, giving users an incomplete type when the definition is
13251 actually available. Note that we do not want to do this for all
13252 enums which are just declarations, because C++0x allows forward
13253 enum declarations. */
13254 if (cu->per_cu->is_debug_types
13255 && die_is_declaration (die, cu))
13257 struct signatured_type *sig_type;
13259 sig_type = (struct signatured_type *) cu->per_cu;
13260 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
13261 if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off)
13265 new_symbol (die, this_type, cu);
13268 /* Extract all information from a DW_TAG_array_type DIE and put it in
13269 the DIE's type field. For now, this only handles one dimensional
13272 static struct type *
13273 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
13275 struct objfile *objfile = cu->objfile;
13276 struct die_info *child_die;
13278 struct type *element_type, *range_type, *index_type;
13279 struct type **range_types = NULL;
13280 struct attribute *attr;
13282 struct cleanup *back_to;
13285 element_type = die_type (die, cu);
13287 /* The die_type call above may have already set the type for this DIE. */
13288 type = get_die_type (die, cu);
13292 /* Irix 6.2 native cc creates array types without children for
13293 arrays with unspecified length. */
13294 if (die->child == NULL)
13296 index_type = objfile_type (objfile)->builtin_int;
13297 range_type = create_range_type (NULL, index_type, 0, -1);
13298 type = create_array_type (NULL, element_type, range_type);
13299 return set_die_type (die, type, cu);
13302 back_to = make_cleanup (null_cleanup, NULL);
13303 child_die = die->child;
13304 while (child_die && child_die->tag)
13306 if (child_die->tag == DW_TAG_subrange_type)
13308 struct type *child_type = read_type_die (child_die, cu);
13310 if (child_type != NULL)
13312 /* The range type was succesfully read. Save it for the
13313 array type creation. */
13314 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
13316 range_types = (struct type **)
13317 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
13318 * sizeof (struct type *));
13320 make_cleanup (free_current_contents, &range_types);
13322 range_types[ndim++] = child_type;
13325 child_die = sibling_die (child_die);
13328 /* Dwarf2 dimensions are output from left to right, create the
13329 necessary array types in backwards order. */
13331 type = element_type;
13333 if (read_array_order (die, cu) == DW_ORD_col_major)
13338 type = create_array_type (NULL, type, range_types[i++]);
13343 type = create_array_type (NULL, type, range_types[ndim]);
13346 /* Understand Dwarf2 support for vector types (like they occur on
13347 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13348 array type. This is not part of the Dwarf2/3 standard yet, but a
13349 custom vendor extension. The main difference between a regular
13350 array and the vector variant is that vectors are passed by value
13352 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
13354 make_vector_type (type);
13356 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13357 implementation may choose to implement triple vectors using this
13359 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13362 if (DW_UNSND (attr) >= TYPE_LENGTH (type))
13363 TYPE_LENGTH (type) = DW_UNSND (attr);
13365 complaint (&symfile_complaints,
13366 _("DW_AT_byte_size for array type smaller "
13367 "than the total size of elements"));
13370 name = dwarf2_name (die, cu);
13372 TYPE_NAME (type) = name;
13374 /* Install the type in the die. */
13375 set_die_type (die, type, cu);
13377 /* set_die_type should be already done. */
13378 set_descriptive_type (type, die, cu);
13380 do_cleanups (back_to);
13385 static enum dwarf_array_dim_ordering
13386 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
13388 struct attribute *attr;
13390 attr = dwarf2_attr (die, DW_AT_ordering, cu);
13392 if (attr) return DW_SND (attr);
13394 /* GNU F77 is a special case, as at 08/2004 array type info is the
13395 opposite order to the dwarf2 specification, but data is still
13396 laid out as per normal fortran.
13398 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13399 version checking. */
13401 if (cu->language == language_fortran
13402 && cu->producer && strstr (cu->producer, "GNU F77"))
13404 return DW_ORD_row_major;
13407 switch (cu->language_defn->la_array_ordering)
13409 case array_column_major:
13410 return DW_ORD_col_major;
13411 case array_row_major:
13413 return DW_ORD_row_major;
13417 /* Extract all information from a DW_TAG_set_type DIE and put it in
13418 the DIE's type field. */
13420 static struct type *
13421 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
13423 struct type *domain_type, *set_type;
13424 struct attribute *attr;
13426 domain_type = die_type (die, cu);
13428 /* The die_type call above may have already set the type for this DIE. */
13429 set_type = get_die_type (die, cu);
13433 set_type = create_set_type (NULL, domain_type);
13435 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13437 TYPE_LENGTH (set_type) = DW_UNSND (attr);
13439 return set_die_type (die, set_type, cu);
13442 /* A helper for read_common_block that creates a locexpr baton.
13443 SYM is the symbol which we are marking as computed.
13444 COMMON_DIE is the DIE for the common block.
13445 COMMON_LOC is the location expression attribute for the common
13447 MEMBER_LOC is the location expression attribute for the particular
13448 member of the common block that we are processing.
13449 CU is the CU from which the above come. */
13452 mark_common_block_symbol_computed (struct symbol *sym,
13453 struct die_info *common_die,
13454 struct attribute *common_loc,
13455 struct attribute *member_loc,
13456 struct dwarf2_cu *cu)
13458 struct objfile *objfile = dwarf2_per_objfile->objfile;
13459 struct dwarf2_locexpr_baton *baton;
13461 unsigned int cu_off;
13462 enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile));
13463 LONGEST offset = 0;
13465 gdb_assert (common_loc && member_loc);
13466 gdb_assert (attr_form_is_block (common_loc));
13467 gdb_assert (attr_form_is_block (member_loc)
13468 || attr_form_is_constant (member_loc));
13470 baton = obstack_alloc (&objfile->objfile_obstack,
13471 sizeof (struct dwarf2_locexpr_baton));
13472 baton->per_cu = cu->per_cu;
13473 gdb_assert (baton->per_cu);
13475 baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13477 if (attr_form_is_constant (member_loc))
13479 offset = dwarf2_get_attr_constant_value (member_loc, 0);
13480 baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size;
13483 baton->size += DW_BLOCK (member_loc)->size;
13485 ptr = obstack_alloc (&objfile->objfile_obstack, baton->size);
13488 *ptr++ = DW_OP_call4;
13489 cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off;
13490 store_unsigned_integer (ptr, 4, byte_order, cu_off);
13493 if (attr_form_is_constant (member_loc))
13495 *ptr++ = DW_OP_addr;
13496 store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset);
13497 ptr += cu->header.addr_size;
13501 /* We have to copy the data here, because DW_OP_call4 will only
13502 use a DW_AT_location attribute. */
13503 memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size);
13504 ptr += DW_BLOCK (member_loc)->size;
13507 *ptr++ = DW_OP_plus;
13508 gdb_assert (ptr - baton->data == baton->size);
13510 SYMBOL_LOCATION_BATON (sym) = baton;
13511 SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index;
13514 /* Create appropriate locally-scoped variables for all the
13515 DW_TAG_common_block entries. Also create a struct common_block
13516 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13517 is used to sepate the common blocks name namespace from regular
13521 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
13523 struct attribute *attr;
13525 attr = dwarf2_attr (die, DW_AT_location, cu);
13528 /* Support the .debug_loc offsets. */
13529 if (attr_form_is_block (attr))
13533 else if (attr_form_is_section_offset (attr))
13535 dwarf2_complex_location_expr_complaint ();
13540 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13541 "common block member");
13546 if (die->child != NULL)
13548 struct objfile *objfile = cu->objfile;
13549 struct die_info *child_die;
13550 size_t n_entries = 0, size;
13551 struct common_block *common_block;
13552 struct symbol *sym;
13554 for (child_die = die->child;
13555 child_die && child_die->tag;
13556 child_die = sibling_die (child_die))
13559 size = (sizeof (struct common_block)
13560 + (n_entries - 1) * sizeof (struct symbol *));
13561 common_block = obstack_alloc (&objfile->objfile_obstack, size);
13562 memset (common_block->contents, 0, n_entries * sizeof (struct symbol *));
13563 common_block->n_entries = 0;
13565 for (child_die = die->child;
13566 child_die && child_die->tag;
13567 child_die = sibling_die (child_die))
13569 /* Create the symbol in the DW_TAG_common_block block in the current
13571 sym = new_symbol (child_die, NULL, cu);
13574 struct attribute *member_loc;
13576 common_block->contents[common_block->n_entries++] = sym;
13578 member_loc = dwarf2_attr (child_die, DW_AT_data_member_location,
13582 /* GDB has handled this for a long time, but it is
13583 not specified by DWARF. It seems to have been
13584 emitted by gfortran at least as recently as:
13585 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13586 complaint (&symfile_complaints,
13587 _("Variable in common block has "
13588 "DW_AT_data_member_location "
13589 "- DIE at 0x%x [in module %s]"),
13590 child_die->offset.sect_off,
13591 objfile_name (cu->objfile));
13593 if (attr_form_is_section_offset (member_loc))
13594 dwarf2_complex_location_expr_complaint ();
13595 else if (attr_form_is_constant (member_loc)
13596 || attr_form_is_block (member_loc))
13599 mark_common_block_symbol_computed (sym, die, attr,
13603 dwarf2_complex_location_expr_complaint ();
13608 sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu);
13609 SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block;
13613 /* Create a type for a C++ namespace. */
13615 static struct type *
13616 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
13618 struct objfile *objfile = cu->objfile;
13619 const char *previous_prefix, *name;
13623 /* For extensions, reuse the type of the original namespace. */
13624 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
13626 struct die_info *ext_die;
13627 struct dwarf2_cu *ext_cu = cu;
13629 ext_die = dwarf2_extension (die, &ext_cu);
13630 type = read_type_die (ext_die, ext_cu);
13632 /* EXT_CU may not be the same as CU.
13633 Ensure TYPE is recorded with CU in die_type_hash. */
13634 return set_die_type (die, type, cu);
13637 name = namespace_name (die, &is_anonymous, cu);
13639 /* Now build the name of the current namespace. */
13641 previous_prefix = determine_prefix (die, cu);
13642 if (previous_prefix[0] != '\0')
13643 name = typename_concat (&objfile->objfile_obstack,
13644 previous_prefix, name, 0, cu);
13646 /* Create the type. */
13647 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
13649 TYPE_NAME (type) = name;
13650 TYPE_TAG_NAME (type) = TYPE_NAME (type);
13652 return set_die_type (die, type, cu);
13655 /* Read a C++ namespace. */
13658 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
13660 struct objfile *objfile = cu->objfile;
13663 /* Add a symbol associated to this if we haven't seen the namespace
13664 before. Also, add a using directive if it's an anonymous
13667 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
13671 type = read_type_die (die, cu);
13672 new_symbol (die, type, cu);
13674 namespace_name (die, &is_anonymous, cu);
13677 const char *previous_prefix = determine_prefix (die, cu);
13679 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
13680 NULL, NULL, 0, &objfile->objfile_obstack);
13684 if (die->child != NULL)
13686 struct die_info *child_die = die->child;
13688 while (child_die && child_die->tag)
13690 process_die (child_die, cu);
13691 child_die = sibling_die (child_die);
13696 /* Read a Fortran module as type. This DIE can be only a declaration used for
13697 imported module. Still we need that type as local Fortran "use ... only"
13698 declaration imports depend on the created type in determine_prefix. */
13700 static struct type *
13701 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
13703 struct objfile *objfile = cu->objfile;
13704 const char *module_name;
13707 module_name = dwarf2_name (die, cu);
13709 complaint (&symfile_complaints,
13710 _("DW_TAG_module has no name, offset 0x%x"),
13711 die->offset.sect_off);
13712 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
13714 /* determine_prefix uses TYPE_TAG_NAME. */
13715 TYPE_TAG_NAME (type) = TYPE_NAME (type);
13717 return set_die_type (die, type, cu);
13720 /* Read a Fortran module. */
13723 read_module (struct die_info *die, struct dwarf2_cu *cu)
13725 struct die_info *child_die = die->child;
13728 type = read_type_die (die, cu);
13729 new_symbol (die, type, cu);
13731 while (child_die && child_die->tag)
13733 process_die (child_die, cu);
13734 child_die = sibling_die (child_die);
13738 /* Return the name of the namespace represented by DIE. Set
13739 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
13742 static const char *
13743 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
13745 struct die_info *current_die;
13746 const char *name = NULL;
13748 /* Loop through the extensions until we find a name. */
13750 for (current_die = die;
13751 current_die != NULL;
13752 current_die = dwarf2_extension (die, &cu))
13754 name = dwarf2_name (current_die, cu);
13759 /* Is it an anonymous namespace? */
13761 *is_anonymous = (name == NULL);
13763 name = CP_ANONYMOUS_NAMESPACE_STR;
13768 /* Extract all information from a DW_TAG_pointer_type DIE and add to
13769 the user defined type vector. */
13771 static struct type *
13772 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
13774 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
13775 struct comp_unit_head *cu_header = &cu->header;
13777 struct attribute *attr_byte_size;
13778 struct attribute *attr_address_class;
13779 int byte_size, addr_class;
13780 struct type *target_type;
13782 target_type = die_type (die, cu);
13784 /* The die_type call above may have already set the type for this DIE. */
13785 type = get_die_type (die, cu);
13789 type = lookup_pointer_type (target_type);
13791 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
13792 if (attr_byte_size)
13793 byte_size = DW_UNSND (attr_byte_size);
13795 byte_size = cu_header->addr_size;
13797 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
13798 if (attr_address_class)
13799 addr_class = DW_UNSND (attr_address_class);
13801 addr_class = DW_ADDR_none;
13803 /* If the pointer size or address class is different than the
13804 default, create a type variant marked as such and set the
13805 length accordingly. */
13806 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
13808 if (gdbarch_address_class_type_flags_p (gdbarch))
13812 type_flags = gdbarch_address_class_type_flags
13813 (gdbarch, byte_size, addr_class);
13814 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
13816 type = make_type_with_address_space (type, type_flags);
13818 else if (TYPE_LENGTH (type) != byte_size)
13820 complaint (&symfile_complaints,
13821 _("invalid pointer size %d"), byte_size);
13825 /* Should we also complain about unhandled address classes? */
13829 TYPE_LENGTH (type) = byte_size;
13830 return set_die_type (die, type, cu);
13833 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
13834 the user defined type vector. */
13836 static struct type *
13837 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
13840 struct type *to_type;
13841 struct type *domain;
13843 to_type = die_type (die, cu);
13844 domain = die_containing_type (die, cu);
13846 /* The calls above may have already set the type for this DIE. */
13847 type = get_die_type (die, cu);
13851 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
13852 type = lookup_methodptr_type (to_type);
13853 else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC)
13855 struct type *new_type = alloc_type (cu->objfile);
13857 smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type),
13858 TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type),
13859 TYPE_VARARGS (to_type));
13860 type = lookup_methodptr_type (new_type);
13863 type = lookup_memberptr_type (to_type, domain);
13865 return set_die_type (die, type, cu);
13868 /* Extract all information from a DW_TAG_reference_type DIE and add to
13869 the user defined type vector. */
13871 static struct type *
13872 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
13874 struct comp_unit_head *cu_header = &cu->header;
13875 struct type *type, *target_type;
13876 struct attribute *attr;
13878 target_type = die_type (die, cu);
13880 /* The die_type call above may have already set the type for this DIE. */
13881 type = get_die_type (die, cu);
13885 type = lookup_reference_type (target_type);
13886 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13889 TYPE_LENGTH (type) = DW_UNSND (attr);
13893 TYPE_LENGTH (type) = cu_header->addr_size;
13895 return set_die_type (die, type, cu);
13898 static struct type *
13899 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
13901 struct type *base_type, *cv_type;
13903 base_type = die_type (die, cu);
13905 /* The die_type call above may have already set the type for this DIE. */
13906 cv_type = get_die_type (die, cu);
13910 /* In case the const qualifier is applied to an array type, the element type
13911 is so qualified, not the array type (section 6.7.3 of C99). */
13912 if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY)
13914 struct type *el_type, *inner_array;
13916 base_type = copy_type (base_type);
13917 inner_array = base_type;
13919 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
13921 TYPE_TARGET_TYPE (inner_array) =
13922 copy_type (TYPE_TARGET_TYPE (inner_array));
13923 inner_array = TYPE_TARGET_TYPE (inner_array);
13926 el_type = TYPE_TARGET_TYPE (inner_array);
13927 TYPE_TARGET_TYPE (inner_array) =
13928 make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL);
13930 return set_die_type (die, base_type, cu);
13933 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
13934 return set_die_type (die, cv_type, cu);
13937 static struct type *
13938 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
13940 struct type *base_type, *cv_type;
13942 base_type = die_type (die, cu);
13944 /* The die_type call above may have already set the type for this DIE. */
13945 cv_type = get_die_type (die, cu);
13949 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
13950 return set_die_type (die, cv_type, cu);
13953 /* Handle DW_TAG_restrict_type. */
13955 static struct type *
13956 read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu)
13958 struct type *base_type, *cv_type;
13960 base_type = die_type (die, cu);
13962 /* The die_type call above may have already set the type for this DIE. */
13963 cv_type = get_die_type (die, cu);
13967 cv_type = make_restrict_type (base_type);
13968 return set_die_type (die, cv_type, cu);
13971 /* Extract all information from a DW_TAG_string_type DIE and add to
13972 the user defined type vector. It isn't really a user defined type,
13973 but it behaves like one, with other DIE's using an AT_user_def_type
13974 attribute to reference it. */
13976 static struct type *
13977 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
13979 struct objfile *objfile = cu->objfile;
13980 struct gdbarch *gdbarch = get_objfile_arch (objfile);
13981 struct type *type, *range_type, *index_type, *char_type;
13982 struct attribute *attr;
13983 unsigned int length;
13985 attr = dwarf2_attr (die, DW_AT_string_length, cu);
13988 length = DW_UNSND (attr);
13992 /* Check for the DW_AT_byte_size attribute. */
13993 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
13996 length = DW_UNSND (attr);
14004 index_type = objfile_type (objfile)->builtin_int;
14005 range_type = create_range_type (NULL, index_type, 1, length);
14006 char_type = language_string_char_type (cu->language_defn, gdbarch);
14007 type = create_string_type (NULL, char_type, range_type);
14009 return set_die_type (die, type, cu);
14012 /* Assuming that DIE corresponds to a function, returns nonzero
14013 if the function is prototyped. */
14016 prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu)
14018 struct attribute *attr;
14020 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
14021 if (attr && (DW_UNSND (attr) != 0))
14024 /* The DWARF standard implies that the DW_AT_prototyped attribute
14025 is only meaninful for C, but the concept also extends to other
14026 languages that allow unprototyped functions (Eg: Objective C).
14027 For all other languages, assume that functions are always
14029 if (cu->language != language_c
14030 && cu->language != language_objc
14031 && cu->language != language_opencl)
14034 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14035 prototyped and unprototyped functions; default to prototyped,
14036 since that is more common in modern code (and RealView warns
14037 about unprototyped functions). */
14038 if (producer_is_realview (cu->producer))
14044 /* Handle DIES due to C code like:
14048 int (*funcp)(int a, long l);
14052 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14054 static struct type *
14055 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
14057 struct objfile *objfile = cu->objfile;
14058 struct type *type; /* Type that this function returns. */
14059 struct type *ftype; /* Function that returns above type. */
14060 struct attribute *attr;
14062 type = die_type (die, cu);
14064 /* The die_type call above may have already set the type for this DIE. */
14065 ftype = get_die_type (die, cu);
14069 ftype = lookup_function_type (type);
14071 if (prototyped_function_p (die, cu))
14072 TYPE_PROTOTYPED (ftype) = 1;
14074 /* Store the calling convention in the type if it's available in
14075 the subroutine die. Otherwise set the calling convention to
14076 the default value DW_CC_normal. */
14077 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
14079 TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr);
14080 else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL"))
14081 TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL;
14083 TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal;
14085 /* We need to add the subroutine type to the die immediately so
14086 we don't infinitely recurse when dealing with parameters
14087 declared as the same subroutine type. */
14088 set_die_type (die, ftype, cu);
14090 if (die->child != NULL)
14092 struct type *void_type = objfile_type (objfile)->builtin_void;
14093 struct die_info *child_die;
14094 int nparams, iparams;
14096 /* Count the number of parameters.
14097 FIXME: GDB currently ignores vararg functions, but knows about
14098 vararg member functions. */
14100 child_die = die->child;
14101 while (child_die && child_die->tag)
14103 if (child_die->tag == DW_TAG_formal_parameter)
14105 else if (child_die->tag == DW_TAG_unspecified_parameters)
14106 TYPE_VARARGS (ftype) = 1;
14107 child_die = sibling_die (child_die);
14110 /* Allocate storage for parameters and fill them in. */
14111 TYPE_NFIELDS (ftype) = nparams;
14112 TYPE_FIELDS (ftype) = (struct field *)
14113 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
14115 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14116 even if we error out during the parameters reading below. */
14117 for (iparams = 0; iparams < nparams; iparams++)
14118 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
14121 child_die = die->child;
14122 while (child_die && child_die->tag)
14124 if (child_die->tag == DW_TAG_formal_parameter)
14126 struct type *arg_type;
14128 /* DWARF version 2 has no clean way to discern C++
14129 static and non-static member functions. G++ helps
14130 GDB by marking the first parameter for non-static
14131 member functions (which is the this pointer) as
14132 artificial. We pass this information to
14133 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14135 DWARF version 3 added DW_AT_object_pointer, which GCC
14136 4.5 does not yet generate. */
14137 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
14139 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
14142 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
14144 /* GCC/43521: In java, the formal parameter
14145 "this" is sometimes not marked with DW_AT_artificial. */
14146 if (cu->language == language_java)
14148 const char *name = dwarf2_name (child_die, cu);
14150 if (name && !strcmp (name, "this"))
14151 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
14154 arg_type = die_type (child_die, cu);
14156 /* RealView does not mark THIS as const, which the testsuite
14157 expects. GCC marks THIS as const in method definitions,
14158 but not in the class specifications (GCC PR 43053). */
14159 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
14160 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
14163 struct dwarf2_cu *arg_cu = cu;
14164 const char *name = dwarf2_name (child_die, cu);
14166 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
14169 /* If the compiler emits this, use it. */
14170 if (follow_die_ref (die, attr, &arg_cu) == child_die)
14173 else if (name && strcmp (name, "this") == 0)
14174 /* Function definitions will have the argument names. */
14176 else if (name == NULL && iparams == 0)
14177 /* Declarations may not have the names, so like
14178 elsewhere in GDB, assume an artificial first
14179 argument is "this". */
14183 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
14187 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
14190 child_die = sibling_die (child_die);
14197 static struct type *
14198 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
14200 struct objfile *objfile = cu->objfile;
14201 const char *name = NULL;
14202 struct type *this_type, *target_type;
14204 name = dwarf2_full_name (NULL, die, cu);
14205 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
14206 TYPE_FLAG_TARGET_STUB, NULL, objfile);
14207 TYPE_NAME (this_type) = name;
14208 set_die_type (die, this_type, cu);
14209 target_type = die_type (die, cu);
14210 if (target_type != this_type)
14211 TYPE_TARGET_TYPE (this_type) = target_type;
14214 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14215 spec and cause infinite loops in GDB. */
14216 complaint (&symfile_complaints,
14217 _("Self-referential DW_TAG_typedef "
14218 "- DIE at 0x%x [in module %s]"),
14219 die->offset.sect_off, objfile_name (objfile));
14220 TYPE_TARGET_TYPE (this_type) = NULL;
14225 /* Find a representation of a given base type and install
14226 it in the TYPE field of the die. */
14228 static struct type *
14229 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
14231 struct objfile *objfile = cu->objfile;
14233 struct attribute *attr;
14234 int encoding = 0, size = 0;
14236 enum type_code code = TYPE_CODE_INT;
14237 int type_flags = 0;
14238 struct type *target_type = NULL;
14240 attr = dwarf2_attr (die, DW_AT_encoding, cu);
14243 encoding = DW_UNSND (attr);
14245 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
14248 size = DW_UNSND (attr);
14250 name = dwarf2_name (die, cu);
14253 complaint (&symfile_complaints,
14254 _("DW_AT_name missing from DW_TAG_base_type"));
14259 case DW_ATE_address:
14260 /* Turn DW_ATE_address into a void * pointer. */
14261 code = TYPE_CODE_PTR;
14262 type_flags |= TYPE_FLAG_UNSIGNED;
14263 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
14265 case DW_ATE_boolean:
14266 code = TYPE_CODE_BOOL;
14267 type_flags |= TYPE_FLAG_UNSIGNED;
14269 case DW_ATE_complex_float:
14270 code = TYPE_CODE_COMPLEX;
14271 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
14273 case DW_ATE_decimal_float:
14274 code = TYPE_CODE_DECFLOAT;
14277 code = TYPE_CODE_FLT;
14279 case DW_ATE_signed:
14281 case DW_ATE_unsigned:
14282 type_flags |= TYPE_FLAG_UNSIGNED;
14283 if (cu->language == language_fortran
14285 && strncmp (name, "character(", sizeof ("character(") - 1) == 0)
14286 code = TYPE_CODE_CHAR;
14288 case DW_ATE_signed_char:
14289 if (cu->language == language_ada || cu->language == language_m2
14290 || cu->language == language_pascal
14291 || cu->language == language_fortran)
14292 code = TYPE_CODE_CHAR;
14294 case DW_ATE_unsigned_char:
14295 if (cu->language == language_ada || cu->language == language_m2
14296 || cu->language == language_pascal
14297 || cu->language == language_fortran)
14298 code = TYPE_CODE_CHAR;
14299 type_flags |= TYPE_FLAG_UNSIGNED;
14302 /* We just treat this as an integer and then recognize the
14303 type by name elsewhere. */
14307 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
14308 dwarf_type_encoding_name (encoding));
14312 type = init_type (code, size, type_flags, NULL, objfile);
14313 TYPE_NAME (type) = name;
14314 TYPE_TARGET_TYPE (type) = target_type;
14316 if (name && strcmp (name, "char") == 0)
14317 TYPE_NOSIGN (type) = 1;
14319 return set_die_type (die, type, cu);
14322 /* Read the given DW_AT_subrange DIE. */
14324 static struct type *
14325 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
14327 struct type *base_type, *orig_base_type;
14328 struct type *range_type;
14329 struct attribute *attr;
14331 int low_default_is_valid;
14333 LONGEST negative_mask;
14335 orig_base_type = die_type (die, cu);
14336 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14337 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14338 creating the range type, but we use the result of check_typedef
14339 when examining properties of the type. */
14340 base_type = check_typedef (orig_base_type);
14342 /* The die_type call above may have already set the type for this DIE. */
14343 range_type = get_die_type (die, cu);
14347 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14348 omitting DW_AT_lower_bound. */
14349 switch (cu->language)
14352 case language_cplus:
14354 low_default_is_valid = 1;
14356 case language_fortran:
14358 low_default_is_valid = 1;
14361 case language_java:
14362 case language_objc:
14364 low_default_is_valid = (cu->header.version >= 4);
14368 case language_pascal:
14370 low_default_is_valid = (cu->header.version >= 4);
14374 low_default_is_valid = 0;
14378 /* FIXME: For variable sized arrays either of these could be
14379 a variable rather than a constant value. We'll allow it,
14380 but we don't know how to handle it. */
14381 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
14383 low = dwarf2_get_attr_constant_value (attr, low);
14384 else if (!low_default_is_valid)
14385 complaint (&symfile_complaints, _("Missing DW_AT_lower_bound "
14386 "- DIE at 0x%x [in module %s]"),
14387 die->offset.sect_off, objfile_name (cu->objfile));
14389 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
14392 if (attr_form_is_block (attr) || attr_form_is_ref (attr))
14394 /* GCC encodes arrays with unspecified or dynamic length
14395 with a DW_FORM_block1 attribute or a reference attribute.
14396 FIXME: GDB does not yet know how to handle dynamic
14397 arrays properly, treat them as arrays with unspecified
14400 FIXME: jimb/2003-09-22: GDB does not really know
14401 how to handle arrays of unspecified length
14402 either; we just represent them as zero-length
14403 arrays. Choose an appropriate upper bound given
14404 the lower bound we've computed above. */
14408 high = dwarf2_get_attr_constant_value (attr, 1);
14412 attr = dwarf2_attr (die, DW_AT_count, cu);
14415 int count = dwarf2_get_attr_constant_value (attr, 1);
14416 high = low + count - 1;
14420 /* Unspecified array length. */
14425 /* Dwarf-2 specifications explicitly allows to create subrange types
14426 without specifying a base type.
14427 In that case, the base type must be set to the type of
14428 the lower bound, upper bound or count, in that order, if any of these
14429 three attributes references an object that has a type.
14430 If no base type is found, the Dwarf-2 specifications say that
14431 a signed integer type of size equal to the size of an address should
14433 For the following C code: `extern char gdb_int [];'
14434 GCC produces an empty range DIE.
14435 FIXME: muller/2010-05-28: Possible references to object for low bound,
14436 high bound or count are not yet handled by this code. */
14437 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
14439 struct objfile *objfile = cu->objfile;
14440 struct gdbarch *gdbarch = get_objfile_arch (objfile);
14441 int addr_size = gdbarch_addr_bit (gdbarch) /8;
14442 struct type *int_type = objfile_type (objfile)->builtin_int;
14444 /* Test "int", "long int", and "long long int" objfile types,
14445 and select the first one having a size above or equal to the
14446 architecture address size. */
14447 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
14448 base_type = int_type;
14451 int_type = objfile_type (objfile)->builtin_long;
14452 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
14453 base_type = int_type;
14456 int_type = objfile_type (objfile)->builtin_long_long;
14457 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
14458 base_type = int_type;
14464 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
14465 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
14466 low |= negative_mask;
14467 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
14468 high |= negative_mask;
14470 range_type = create_range_type (NULL, orig_base_type, low, high);
14472 /* Mark arrays with dynamic length at least as an array of unspecified
14473 length. GDB could check the boundary but before it gets implemented at
14474 least allow accessing the array elements. */
14475 if (attr && attr_form_is_block (attr))
14476 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
14478 /* Ada expects an empty array on no boundary attributes. */
14479 if (attr == NULL && cu->language != language_ada)
14480 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
14482 name = dwarf2_name (die, cu);
14484 TYPE_NAME (range_type) = name;
14486 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
14488 TYPE_LENGTH (range_type) = DW_UNSND (attr);
14490 set_die_type (die, range_type, cu);
14492 /* set_die_type should be already done. */
14493 set_descriptive_type (range_type, die, cu);
14498 static struct type *
14499 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
14503 /* For now, we only support the C meaning of an unspecified type: void. */
14505 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
14506 TYPE_NAME (type) = dwarf2_name (die, cu);
14508 return set_die_type (die, type, cu);
14511 /* Read a single die and all its descendents. Set the die's sibling
14512 field to NULL; set other fields in the die correctly, and set all
14513 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
14514 location of the info_ptr after reading all of those dies. PARENT
14515 is the parent of the die in question. */
14517 static struct die_info *
14518 read_die_and_children (const struct die_reader_specs *reader,
14519 const gdb_byte *info_ptr,
14520 const gdb_byte **new_info_ptr,
14521 struct die_info *parent)
14523 struct die_info *die;
14524 const gdb_byte *cur_ptr;
14527 cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0);
14530 *new_info_ptr = cur_ptr;
14533 store_in_ref_table (die, reader->cu);
14536 die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die);
14540 *new_info_ptr = cur_ptr;
14543 die->sibling = NULL;
14544 die->parent = parent;
14548 /* Read a die, all of its descendents, and all of its siblings; set
14549 all of the fields of all of the dies correctly. Arguments are as
14550 in read_die_and_children. */
14552 static struct die_info *
14553 read_die_and_siblings_1 (const struct die_reader_specs *reader,
14554 const gdb_byte *info_ptr,
14555 const gdb_byte **new_info_ptr,
14556 struct die_info *parent)
14558 struct die_info *first_die, *last_sibling;
14559 const gdb_byte *cur_ptr;
14561 cur_ptr = info_ptr;
14562 first_die = last_sibling = NULL;
14566 struct die_info *die
14567 = read_die_and_children (reader, cur_ptr, &cur_ptr, parent);
14571 *new_info_ptr = cur_ptr;
14578 last_sibling->sibling = die;
14580 last_sibling = die;
14584 /* Read a die, all of its descendents, and all of its siblings; set
14585 all of the fields of all of the dies correctly. Arguments are as
14586 in read_die_and_children.
14587 This the main entry point for reading a DIE and all its children. */
14589 static struct die_info *
14590 read_die_and_siblings (const struct die_reader_specs *reader,
14591 const gdb_byte *info_ptr,
14592 const gdb_byte **new_info_ptr,
14593 struct die_info *parent)
14595 struct die_info *die = read_die_and_siblings_1 (reader, info_ptr,
14596 new_info_ptr, parent);
14598 if (dwarf2_die_debug)
14600 fprintf_unfiltered (gdb_stdlog,
14601 "Read die from %s@0x%x of %s:\n",
14602 get_section_name (reader->die_section),
14603 (unsigned) (info_ptr - reader->die_section->buffer),
14604 bfd_get_filename (reader->abfd));
14605 dump_die (die, dwarf2_die_debug);
14611 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
14613 The caller is responsible for filling in the extra attributes
14614 and updating (*DIEP)->num_attrs.
14615 Set DIEP to point to a newly allocated die with its information,
14616 except for its child, sibling, and parent fields.
14617 Set HAS_CHILDREN to tell whether the die has children or not. */
14619 static const gdb_byte *
14620 read_full_die_1 (const struct die_reader_specs *reader,
14621 struct die_info **diep, const gdb_byte *info_ptr,
14622 int *has_children, int num_extra_attrs)
14624 unsigned int abbrev_number, bytes_read, i;
14625 sect_offset offset;
14626 struct abbrev_info *abbrev;
14627 struct die_info *die;
14628 struct dwarf2_cu *cu = reader->cu;
14629 bfd *abfd = reader->abfd;
14631 offset.sect_off = info_ptr - reader->buffer;
14632 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14633 info_ptr += bytes_read;
14634 if (!abbrev_number)
14641 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
14643 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
14645 bfd_get_filename (abfd));
14647 die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs);
14648 die->offset = offset;
14649 die->tag = abbrev->tag;
14650 die->abbrev = abbrev_number;
14652 /* Make the result usable.
14653 The caller needs to update num_attrs after adding the extra
14655 die->num_attrs = abbrev->num_attrs;
14657 for (i = 0; i < abbrev->num_attrs; ++i)
14658 info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i],
14662 *has_children = abbrev->has_children;
14666 /* Read a die and all its attributes.
14667 Set DIEP to point to a newly allocated die with its information,
14668 except for its child, sibling, and parent fields.
14669 Set HAS_CHILDREN to tell whether the die has children or not. */
14671 static const gdb_byte *
14672 read_full_die (const struct die_reader_specs *reader,
14673 struct die_info **diep, const gdb_byte *info_ptr,
14676 const gdb_byte *result;
14678 result = read_full_die_1 (reader, diep, info_ptr, has_children, 0);
14680 if (dwarf2_die_debug)
14682 fprintf_unfiltered (gdb_stdlog,
14683 "Read die from %s@0x%x of %s:\n",
14684 get_section_name (reader->die_section),
14685 (unsigned) (info_ptr - reader->die_section->buffer),
14686 bfd_get_filename (reader->abfd));
14687 dump_die (*diep, dwarf2_die_debug);
14693 /* Abbreviation tables.
14695 In DWARF version 2, the description of the debugging information is
14696 stored in a separate .debug_abbrev section. Before we read any
14697 dies from a section we read in all abbreviations and install them
14698 in a hash table. */
14700 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
14702 static struct abbrev_info *
14703 abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table)
14705 struct abbrev_info *abbrev;
14707 abbrev = (struct abbrev_info *)
14708 obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info));
14709 memset (abbrev, 0, sizeof (struct abbrev_info));
14713 /* Add an abbreviation to the table. */
14716 abbrev_table_add_abbrev (struct abbrev_table *abbrev_table,
14717 unsigned int abbrev_number,
14718 struct abbrev_info *abbrev)
14720 unsigned int hash_number;
14722 hash_number = abbrev_number % ABBREV_HASH_SIZE;
14723 abbrev->next = abbrev_table->abbrevs[hash_number];
14724 abbrev_table->abbrevs[hash_number] = abbrev;
14727 /* Look up an abbrev in the table.
14728 Returns NULL if the abbrev is not found. */
14730 static struct abbrev_info *
14731 abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table,
14732 unsigned int abbrev_number)
14734 unsigned int hash_number;
14735 struct abbrev_info *abbrev;
14737 hash_number = abbrev_number % ABBREV_HASH_SIZE;
14738 abbrev = abbrev_table->abbrevs[hash_number];
14742 if (abbrev->number == abbrev_number)
14744 abbrev = abbrev->next;
14749 /* Read in an abbrev table. */
14751 static struct abbrev_table *
14752 abbrev_table_read_table (struct dwarf2_section_info *section,
14753 sect_offset offset)
14755 struct objfile *objfile = dwarf2_per_objfile->objfile;
14756 bfd *abfd = get_section_bfd_owner (section);
14757 struct abbrev_table *abbrev_table;
14758 const gdb_byte *abbrev_ptr;
14759 struct abbrev_info *cur_abbrev;
14760 unsigned int abbrev_number, bytes_read, abbrev_name;
14761 unsigned int abbrev_form;
14762 struct attr_abbrev *cur_attrs;
14763 unsigned int allocated_attrs;
14765 abbrev_table = XNEW (struct abbrev_table);
14766 abbrev_table->offset = offset;
14767 obstack_init (&abbrev_table->abbrev_obstack);
14768 abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack,
14770 * sizeof (struct abbrev_info *)));
14771 memset (abbrev_table->abbrevs, 0,
14772 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
14774 dwarf2_read_section (objfile, section);
14775 abbrev_ptr = section->buffer + offset.sect_off;
14776 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
14777 abbrev_ptr += bytes_read;
14779 allocated_attrs = ATTR_ALLOC_CHUNK;
14780 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
14782 /* Loop until we reach an abbrev number of 0. */
14783 while (abbrev_number)
14785 cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table);
14787 /* read in abbrev header */
14788 cur_abbrev->number = abbrev_number;
14789 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
14790 abbrev_ptr += bytes_read;
14791 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
14794 /* now read in declarations */
14795 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
14796 abbrev_ptr += bytes_read;
14797 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
14798 abbrev_ptr += bytes_read;
14799 while (abbrev_name)
14801 if (cur_abbrev->num_attrs == allocated_attrs)
14803 allocated_attrs += ATTR_ALLOC_CHUNK;
14805 = xrealloc (cur_attrs, (allocated_attrs
14806 * sizeof (struct attr_abbrev)));
14809 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
14810 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
14811 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
14812 abbrev_ptr += bytes_read;
14813 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
14814 abbrev_ptr += bytes_read;
14817 cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack,
14818 (cur_abbrev->num_attrs
14819 * sizeof (struct attr_abbrev)));
14820 memcpy (cur_abbrev->attrs, cur_attrs,
14821 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
14823 abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev);
14825 /* Get next abbreviation.
14826 Under Irix6 the abbreviations for a compilation unit are not
14827 always properly terminated with an abbrev number of 0.
14828 Exit loop if we encounter an abbreviation which we have
14829 already read (which means we are about to read the abbreviations
14830 for the next compile unit) or if the end of the abbreviation
14831 table is reached. */
14832 if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size)
14834 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
14835 abbrev_ptr += bytes_read;
14836 if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL)
14841 return abbrev_table;
14844 /* Free the resources held by ABBREV_TABLE. */
14847 abbrev_table_free (struct abbrev_table *abbrev_table)
14849 obstack_free (&abbrev_table->abbrev_obstack, NULL);
14850 xfree (abbrev_table);
14853 /* Same as abbrev_table_free but as a cleanup.
14854 We pass in a pointer to the pointer to the table so that we can
14855 set the pointer to NULL when we're done. It also simplifies
14856 build_type_unit_groups. */
14859 abbrev_table_free_cleanup (void *table_ptr)
14861 struct abbrev_table **abbrev_table_ptr = table_ptr;
14863 if (*abbrev_table_ptr != NULL)
14864 abbrev_table_free (*abbrev_table_ptr);
14865 *abbrev_table_ptr = NULL;
14868 /* Read the abbrev table for CU from ABBREV_SECTION. */
14871 dwarf2_read_abbrevs (struct dwarf2_cu *cu,
14872 struct dwarf2_section_info *abbrev_section)
14875 abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset);
14878 /* Release the memory used by the abbrev table for a compilation unit. */
14881 dwarf2_free_abbrev_table (void *ptr_to_cu)
14883 struct dwarf2_cu *cu = ptr_to_cu;
14885 if (cu->abbrev_table != NULL)
14886 abbrev_table_free (cu->abbrev_table);
14887 /* Set this to NULL so that we SEGV if we try to read it later,
14888 and also because free_comp_unit verifies this is NULL. */
14889 cu->abbrev_table = NULL;
14892 /* Returns nonzero if TAG represents a type that we might generate a partial
14896 is_type_tag_for_partial (int tag)
14901 /* Some types that would be reasonable to generate partial symbols for,
14902 that we don't at present. */
14903 case DW_TAG_array_type:
14904 case DW_TAG_file_type:
14905 case DW_TAG_ptr_to_member_type:
14906 case DW_TAG_set_type:
14907 case DW_TAG_string_type:
14908 case DW_TAG_subroutine_type:
14910 case DW_TAG_base_type:
14911 case DW_TAG_class_type:
14912 case DW_TAG_interface_type:
14913 case DW_TAG_enumeration_type:
14914 case DW_TAG_structure_type:
14915 case DW_TAG_subrange_type:
14916 case DW_TAG_typedef:
14917 case DW_TAG_union_type:
14924 /* Load all DIEs that are interesting for partial symbols into memory. */
14926 static struct partial_die_info *
14927 load_partial_dies (const struct die_reader_specs *reader,
14928 const gdb_byte *info_ptr, int building_psymtab)
14930 struct dwarf2_cu *cu = reader->cu;
14931 struct objfile *objfile = cu->objfile;
14932 struct partial_die_info *part_die;
14933 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
14934 struct abbrev_info *abbrev;
14935 unsigned int bytes_read;
14936 unsigned int load_all = 0;
14937 int nesting_level = 1;
14942 gdb_assert (cu->per_cu != NULL);
14943 if (cu->per_cu->load_all_dies)
14947 = htab_create_alloc_ex (cu->header.length / 12,
14951 &cu->comp_unit_obstack,
14952 hashtab_obstack_allocate,
14953 dummy_obstack_deallocate);
14955 part_die = obstack_alloc (&cu->comp_unit_obstack,
14956 sizeof (struct partial_die_info));
14960 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
14962 /* A NULL abbrev means the end of a series of children. */
14963 if (abbrev == NULL)
14965 if (--nesting_level == 0)
14967 /* PART_DIE was probably the last thing allocated on the
14968 comp_unit_obstack, so we could call obstack_free
14969 here. We don't do that because the waste is small,
14970 and will be cleaned up when we're done with this
14971 compilation unit. This way, we're also more robust
14972 against other users of the comp_unit_obstack. */
14975 info_ptr += bytes_read;
14976 last_die = parent_die;
14977 parent_die = parent_die->die_parent;
14981 /* Check for template arguments. We never save these; if
14982 they're seen, we just mark the parent, and go on our way. */
14983 if (parent_die != NULL
14984 && cu->language == language_cplus
14985 && (abbrev->tag == DW_TAG_template_type_param
14986 || abbrev->tag == DW_TAG_template_value_param))
14988 parent_die->has_template_arguments = 1;
14992 /* We don't need a partial DIE for the template argument. */
14993 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
14998 /* We only recurse into c++ subprograms looking for template arguments.
14999 Skip their other children. */
15001 && cu->language == language_cplus
15002 && parent_die != NULL
15003 && parent_die->tag == DW_TAG_subprogram)
15005 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
15009 /* Check whether this DIE is interesting enough to save. Normally
15010 we would not be interested in members here, but there may be
15011 later variables referencing them via DW_AT_specification (for
15012 static members). */
15014 && !is_type_tag_for_partial (abbrev->tag)
15015 && abbrev->tag != DW_TAG_constant
15016 && abbrev->tag != DW_TAG_enumerator
15017 && abbrev->tag != DW_TAG_subprogram
15018 && abbrev->tag != DW_TAG_lexical_block
15019 && abbrev->tag != DW_TAG_variable
15020 && abbrev->tag != DW_TAG_namespace
15021 && abbrev->tag != DW_TAG_module
15022 && abbrev->tag != DW_TAG_member
15023 && abbrev->tag != DW_TAG_imported_unit
15024 && abbrev->tag != DW_TAG_imported_declaration)
15026 /* Otherwise we skip to the next sibling, if any. */
15027 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
15031 info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read,
15034 /* This two-pass algorithm for processing partial symbols has a
15035 high cost in cache pressure. Thus, handle some simple cases
15036 here which cover the majority of C partial symbols. DIEs
15037 which neither have specification tags in them, nor could have
15038 specification tags elsewhere pointing at them, can simply be
15039 processed and discarded.
15041 This segment is also optional; scan_partial_symbols and
15042 add_partial_symbol will handle these DIEs if we chain
15043 them in normally. When compilers which do not emit large
15044 quantities of duplicate debug information are more common,
15045 this code can probably be removed. */
15047 /* Any complete simple types at the top level (pretty much all
15048 of them, for a language without namespaces), can be processed
15050 if (parent_die == NULL
15051 && part_die->has_specification == 0
15052 && part_die->is_declaration == 0
15053 && ((part_die->tag == DW_TAG_typedef && !part_die->has_children)
15054 || part_die->tag == DW_TAG_base_type
15055 || part_die->tag == DW_TAG_subrange_type))
15057 if (building_psymtab && part_die->name != NULL)
15058 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
15059 VAR_DOMAIN, LOC_TYPEDEF,
15060 &objfile->static_psymbols,
15061 0, (CORE_ADDR) 0, cu->language, objfile);
15062 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
15066 /* The exception for DW_TAG_typedef with has_children above is
15067 a workaround of GCC PR debug/47510. In the case of this complaint
15068 type_name_no_tag_or_error will error on such types later.
15070 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15071 it could not find the child DIEs referenced later, this is checked
15072 above. In correct DWARF DW_TAG_typedef should have no children. */
15074 if (part_die->tag == DW_TAG_typedef && part_die->has_children)
15075 complaint (&symfile_complaints,
15076 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15077 "- DIE at 0x%x [in module %s]"),
15078 part_die->offset.sect_off, objfile_name (objfile));
15080 /* If we're at the second level, and we're an enumerator, and
15081 our parent has no specification (meaning possibly lives in a
15082 namespace elsewhere), then we can add the partial symbol now
15083 instead of queueing it. */
15084 if (part_die->tag == DW_TAG_enumerator
15085 && parent_die != NULL
15086 && parent_die->die_parent == NULL
15087 && parent_die->tag == DW_TAG_enumeration_type
15088 && parent_die->has_specification == 0)
15090 if (part_die->name == NULL)
15091 complaint (&symfile_complaints,
15092 _("malformed enumerator DIE ignored"));
15093 else if (building_psymtab)
15094 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
15095 VAR_DOMAIN, LOC_CONST,
15096 (cu->language == language_cplus
15097 || cu->language == language_java)
15098 ? &objfile->global_psymbols
15099 : &objfile->static_psymbols,
15100 0, (CORE_ADDR) 0, cu->language, objfile);
15102 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
15106 /* We'll save this DIE so link it in. */
15107 part_die->die_parent = parent_die;
15108 part_die->die_sibling = NULL;
15109 part_die->die_child = NULL;
15111 if (last_die && last_die == parent_die)
15112 last_die->die_child = part_die;
15114 last_die->die_sibling = part_die;
15116 last_die = part_die;
15118 if (first_die == NULL)
15119 first_die = part_die;
15121 /* Maybe add the DIE to the hash table. Not all DIEs that we
15122 find interesting need to be in the hash table, because we
15123 also have the parent/sibling/child chains; only those that we
15124 might refer to by offset later during partial symbol reading.
15126 For now this means things that might have be the target of a
15127 DW_AT_specification, DW_AT_abstract_origin, or
15128 DW_AT_extension. DW_AT_extension will refer only to
15129 namespaces; DW_AT_abstract_origin refers to functions (and
15130 many things under the function DIE, but we do not recurse
15131 into function DIEs during partial symbol reading) and
15132 possibly variables as well; DW_AT_specification refers to
15133 declarations. Declarations ought to have the DW_AT_declaration
15134 flag. It happens that GCC forgets to put it in sometimes, but
15135 only for functions, not for types.
15137 Adding more things than necessary to the hash table is harmless
15138 except for the performance cost. Adding too few will result in
15139 wasted time in find_partial_die, when we reread the compilation
15140 unit with load_all_dies set. */
15143 || abbrev->tag == DW_TAG_constant
15144 || abbrev->tag == DW_TAG_subprogram
15145 || abbrev->tag == DW_TAG_variable
15146 || abbrev->tag == DW_TAG_namespace
15147 || part_die->is_declaration)
15151 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
15152 part_die->offset.sect_off, INSERT);
15156 part_die = obstack_alloc (&cu->comp_unit_obstack,
15157 sizeof (struct partial_die_info));
15159 /* For some DIEs we want to follow their children (if any). For C
15160 we have no reason to follow the children of structures; for other
15161 languages we have to, so that we can get at method physnames
15162 to infer fully qualified class names, for DW_AT_specification,
15163 and for C++ template arguments. For C++, we also look one level
15164 inside functions to find template arguments (if the name of the
15165 function does not already contain the template arguments).
15167 For Ada, we need to scan the children of subprograms and lexical
15168 blocks as well because Ada allows the definition of nested
15169 entities that could be interesting for the debugger, such as
15170 nested subprograms for instance. */
15171 if (last_die->has_children
15173 || last_die->tag == DW_TAG_namespace
15174 || last_die->tag == DW_TAG_module
15175 || last_die->tag == DW_TAG_enumeration_type
15176 || (cu->language == language_cplus
15177 && last_die->tag == DW_TAG_subprogram
15178 && (last_die->name == NULL
15179 || strchr (last_die->name, '<') == NULL))
15180 || (cu->language != language_c
15181 && (last_die->tag == DW_TAG_class_type
15182 || last_die->tag == DW_TAG_interface_type
15183 || last_die->tag == DW_TAG_structure_type
15184 || last_die->tag == DW_TAG_union_type))
15185 || (cu->language == language_ada
15186 && (last_die->tag == DW_TAG_subprogram
15187 || last_die->tag == DW_TAG_lexical_block))))
15190 parent_die = last_die;
15194 /* Otherwise we skip to the next sibling, if any. */
15195 info_ptr = locate_pdi_sibling (reader, last_die, info_ptr);
15197 /* Back to the top, do it again. */
15201 /* Read a minimal amount of information into the minimal die structure. */
15203 static const gdb_byte *
15204 read_partial_die (const struct die_reader_specs *reader,
15205 struct partial_die_info *part_die,
15206 struct abbrev_info *abbrev, unsigned int abbrev_len,
15207 const gdb_byte *info_ptr)
15209 struct dwarf2_cu *cu = reader->cu;
15210 struct objfile *objfile = cu->objfile;
15211 const gdb_byte *buffer = reader->buffer;
15213 struct attribute attr;
15214 int has_low_pc_attr = 0;
15215 int has_high_pc_attr = 0;
15216 int high_pc_relative = 0;
15218 memset (part_die, 0, sizeof (struct partial_die_info));
15220 part_die->offset.sect_off = info_ptr - buffer;
15222 info_ptr += abbrev_len;
15224 if (abbrev == NULL)
15227 part_die->tag = abbrev->tag;
15228 part_die->has_children = abbrev->has_children;
15230 for (i = 0; i < abbrev->num_attrs; ++i)
15232 info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
15234 /* Store the data if it is of an attribute we want to keep in a
15235 partial symbol table. */
15239 switch (part_die->tag)
15241 case DW_TAG_compile_unit:
15242 case DW_TAG_partial_unit:
15243 case DW_TAG_type_unit:
15244 /* Compilation units have a DW_AT_name that is a filename, not
15245 a source language identifier. */
15246 case DW_TAG_enumeration_type:
15247 case DW_TAG_enumerator:
15248 /* These tags always have simple identifiers already; no need
15249 to canonicalize them. */
15250 part_die->name = DW_STRING (&attr);
15254 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
15255 &objfile->objfile_obstack);
15259 case DW_AT_linkage_name:
15260 case DW_AT_MIPS_linkage_name:
15261 /* Note that both forms of linkage name might appear. We
15262 assume they will be the same, and we only store the last
15264 if (cu->language == language_ada)
15265 part_die->name = DW_STRING (&attr);
15266 part_die->linkage_name = DW_STRING (&attr);
15269 has_low_pc_attr = 1;
15270 part_die->lowpc = DW_ADDR (&attr);
15272 case DW_AT_high_pc:
15273 has_high_pc_attr = 1;
15274 if (attr.form == DW_FORM_addr
15275 || attr.form == DW_FORM_GNU_addr_index)
15276 part_die->highpc = DW_ADDR (&attr);
15279 high_pc_relative = 1;
15280 part_die->highpc = DW_UNSND (&attr);
15283 case DW_AT_location:
15284 /* Support the .debug_loc offsets. */
15285 if (attr_form_is_block (&attr))
15287 part_die->d.locdesc = DW_BLOCK (&attr);
15289 else if (attr_form_is_section_offset (&attr))
15291 dwarf2_complex_location_expr_complaint ();
15295 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15296 "partial symbol information");
15299 case DW_AT_external:
15300 part_die->is_external = DW_UNSND (&attr);
15302 case DW_AT_declaration:
15303 part_die->is_declaration = DW_UNSND (&attr);
15306 part_die->has_type = 1;
15308 case DW_AT_abstract_origin:
15309 case DW_AT_specification:
15310 case DW_AT_extension:
15311 part_die->has_specification = 1;
15312 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
15313 part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt
15314 || cu->per_cu->is_dwz);
15316 case DW_AT_sibling:
15317 /* Ignore absolute siblings, they might point outside of
15318 the current compile unit. */
15319 if (attr.form == DW_FORM_ref_addr)
15320 complaint (&symfile_complaints,
15321 _("ignoring absolute DW_AT_sibling"));
15324 unsigned int off = dwarf2_get_ref_die_offset (&attr).sect_off;
15325 const gdb_byte *sibling_ptr = buffer + off;
15327 if (sibling_ptr < info_ptr)
15328 complaint (&symfile_complaints,
15329 _("DW_AT_sibling points backwards"));
15331 part_die->sibling = sibling_ptr;
15334 case DW_AT_byte_size:
15335 part_die->has_byte_size = 1;
15337 case DW_AT_calling_convention:
15338 /* DWARF doesn't provide a way to identify a program's source-level
15339 entry point. DW_AT_calling_convention attributes are only meant
15340 to describe functions' calling conventions.
15342 However, because it's a necessary piece of information in
15343 Fortran, and because DW_CC_program is the only piece of debugging
15344 information whose definition refers to a 'main program' at all,
15345 several compilers have begun marking Fortran main programs with
15346 DW_CC_program --- even when those functions use the standard
15347 calling conventions.
15349 So until DWARF specifies a way to provide this information and
15350 compilers pick up the new representation, we'll support this
15352 if (DW_UNSND (&attr) == DW_CC_program
15353 && cu->language == language_fortran)
15354 set_objfile_main_name (objfile, part_die->name, language_fortran);
15357 if (DW_UNSND (&attr) == DW_INL_inlined
15358 || DW_UNSND (&attr) == DW_INL_declared_inlined)
15359 part_die->may_be_inlined = 1;
15363 if (part_die->tag == DW_TAG_imported_unit)
15365 part_die->d.offset = dwarf2_get_ref_die_offset (&attr);
15366 part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt
15367 || cu->per_cu->is_dwz);
15376 if (high_pc_relative)
15377 part_die->highpc += part_die->lowpc;
15379 if (has_low_pc_attr && has_high_pc_attr)
15381 /* When using the GNU linker, .gnu.linkonce. sections are used to
15382 eliminate duplicate copies of functions and vtables and such.
15383 The linker will arbitrarily choose one and discard the others.
15384 The AT_*_pc values for such functions refer to local labels in
15385 these sections. If the section from that file was discarded, the
15386 labels are not in the output, so the relocs get a value of 0.
15387 If this is a discarded function, mark the pc bounds as invalid,
15388 so that GDB will ignore it. */
15389 if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero)
15391 struct gdbarch *gdbarch = get_objfile_arch (objfile);
15393 complaint (&symfile_complaints,
15394 _("DW_AT_low_pc %s is zero "
15395 "for DIE at 0x%x [in module %s]"),
15396 paddress (gdbarch, part_die->lowpc),
15397 part_die->offset.sect_off, objfile_name (objfile));
15399 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15400 else if (part_die->lowpc >= part_die->highpc)
15402 struct gdbarch *gdbarch = get_objfile_arch (objfile);
15404 complaint (&symfile_complaints,
15405 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15406 "for DIE at 0x%x [in module %s]"),
15407 paddress (gdbarch, part_die->lowpc),
15408 paddress (gdbarch, part_die->highpc),
15409 part_die->offset.sect_off, objfile_name (objfile));
15412 part_die->has_pc_info = 1;
15418 /* Find a cached partial DIE at OFFSET in CU. */
15420 static struct partial_die_info *
15421 find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu)
15423 struct partial_die_info *lookup_die = NULL;
15424 struct partial_die_info part_die;
15426 part_die.offset = offset;
15427 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die,
15433 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15434 except in the case of .debug_types DIEs which do not reference
15435 outside their CU (they do however referencing other types via
15436 DW_FORM_ref_sig8). */
15438 static struct partial_die_info *
15439 find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu)
15441 struct objfile *objfile = cu->objfile;
15442 struct dwarf2_per_cu_data *per_cu = NULL;
15443 struct partial_die_info *pd = NULL;
15445 if (offset_in_dwz == cu->per_cu->is_dwz
15446 && offset_in_cu_p (&cu->header, offset))
15448 pd = find_partial_die_in_comp_unit (offset, cu);
15451 /* We missed recording what we needed.
15452 Load all dies and try again. */
15453 per_cu = cu->per_cu;
15457 /* TUs don't reference other CUs/TUs (except via type signatures). */
15458 if (cu->per_cu->is_debug_types)
15460 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15461 " external reference to offset 0x%lx [in module %s].\n"),
15462 (long) cu->header.offset.sect_off, (long) offset.sect_off,
15463 bfd_get_filename (objfile->obfd));
15465 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
15468 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
15469 load_partial_comp_unit (per_cu);
15471 per_cu->cu->last_used = 0;
15472 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
15475 /* If we didn't find it, and not all dies have been loaded,
15476 load them all and try again. */
15478 if (pd == NULL && per_cu->load_all_dies == 0)
15480 per_cu->load_all_dies = 1;
15482 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15483 THIS_CU->cu may already be in use. So we can't just free it and
15484 replace its DIEs with the ones we read in. Instead, we leave those
15485 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15486 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15488 load_partial_comp_unit (per_cu);
15490 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
15494 internal_error (__FILE__, __LINE__,
15495 _("could not find partial DIE 0x%x "
15496 "in cache [from module %s]\n"),
15497 offset.sect_off, bfd_get_filename (objfile->obfd));
15501 /* See if we can figure out if the class lives in a namespace. We do
15502 this by looking for a member function; its demangled name will
15503 contain namespace info, if there is any. */
15506 guess_partial_die_structure_name (struct partial_die_info *struct_pdi,
15507 struct dwarf2_cu *cu)
15509 /* NOTE: carlton/2003-10-07: Getting the info this way changes
15510 what template types look like, because the demangler
15511 frequently doesn't give the same name as the debug info. We
15512 could fix this by only using the demangled name to get the
15513 prefix (but see comment in read_structure_type). */
15515 struct partial_die_info *real_pdi;
15516 struct partial_die_info *child_pdi;
15518 /* If this DIE (this DIE's specification, if any) has a parent, then
15519 we should not do this. We'll prepend the parent's fully qualified
15520 name when we create the partial symbol. */
15522 real_pdi = struct_pdi;
15523 while (real_pdi->has_specification)
15524 real_pdi = find_partial_die (real_pdi->spec_offset,
15525 real_pdi->spec_is_dwz, cu);
15527 if (real_pdi->die_parent != NULL)
15530 for (child_pdi = struct_pdi->die_child;
15532 child_pdi = child_pdi->die_sibling)
15534 if (child_pdi->tag == DW_TAG_subprogram
15535 && child_pdi->linkage_name != NULL)
15537 char *actual_class_name
15538 = language_class_name_from_physname (cu->language_defn,
15539 child_pdi->linkage_name);
15540 if (actual_class_name != NULL)
15543 = obstack_copy0 (&cu->objfile->objfile_obstack,
15545 strlen (actual_class_name));
15546 xfree (actual_class_name);
15553 /* Adjust PART_DIE before generating a symbol for it. This function
15554 may set the is_external flag or change the DIE's name. */
15557 fixup_partial_die (struct partial_die_info *part_die,
15558 struct dwarf2_cu *cu)
15560 /* Once we've fixed up a die, there's no point in doing so again.
15561 This also avoids a memory leak if we were to call
15562 guess_partial_die_structure_name multiple times. */
15563 if (part_die->fixup_called)
15566 /* If we found a reference attribute and the DIE has no name, try
15567 to find a name in the referred to DIE. */
15569 if (part_die->name == NULL && part_die->has_specification)
15571 struct partial_die_info *spec_die;
15573 spec_die = find_partial_die (part_die->spec_offset,
15574 part_die->spec_is_dwz, cu);
15576 fixup_partial_die (spec_die, cu);
15578 if (spec_die->name)
15580 part_die->name = spec_die->name;
15582 /* Copy DW_AT_external attribute if it is set. */
15583 if (spec_die->is_external)
15584 part_die->is_external = spec_die->is_external;
15588 /* Set default names for some unnamed DIEs. */
15590 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
15591 part_die->name = CP_ANONYMOUS_NAMESPACE_STR;
15593 /* If there is no parent die to provide a namespace, and there are
15594 children, see if we can determine the namespace from their linkage
15596 if (cu->language == language_cplus
15597 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
15598 && part_die->die_parent == NULL
15599 && part_die->has_children
15600 && (part_die->tag == DW_TAG_class_type
15601 || part_die->tag == DW_TAG_structure_type
15602 || part_die->tag == DW_TAG_union_type))
15603 guess_partial_die_structure_name (part_die, cu);
15605 /* GCC might emit a nameless struct or union that has a linkage
15606 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15607 if (part_die->name == NULL
15608 && (part_die->tag == DW_TAG_class_type
15609 || part_die->tag == DW_TAG_interface_type
15610 || part_die->tag == DW_TAG_structure_type
15611 || part_die->tag == DW_TAG_union_type)
15612 && part_die->linkage_name != NULL)
15616 demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES);
15621 /* Strip any leading namespaces/classes, keep only the base name.
15622 DW_AT_name for named DIEs does not contain the prefixes. */
15623 base = strrchr (demangled, ':');
15624 if (base && base > demangled && base[-1] == ':')
15629 part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack,
15630 base, strlen (base));
15635 part_die->fixup_called = 1;
15638 /* Read an attribute value described by an attribute form. */
15640 static const gdb_byte *
15641 read_attribute_value (const struct die_reader_specs *reader,
15642 struct attribute *attr, unsigned form,
15643 const gdb_byte *info_ptr)
15645 struct dwarf2_cu *cu = reader->cu;
15646 bfd *abfd = reader->abfd;
15647 struct comp_unit_head *cu_header = &cu->header;
15648 unsigned int bytes_read;
15649 struct dwarf_block *blk;
15654 case DW_FORM_ref_addr:
15655 if (cu->header.version == 2)
15656 DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
15658 DW_UNSND (attr) = read_offset (abfd, info_ptr,
15659 &cu->header, &bytes_read);
15660 info_ptr += bytes_read;
15662 case DW_FORM_GNU_ref_alt:
15663 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
15664 info_ptr += bytes_read;
15667 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
15668 info_ptr += bytes_read;
15670 case DW_FORM_block2:
15671 blk = dwarf_alloc_block (cu);
15672 blk->size = read_2_bytes (abfd, info_ptr);
15674 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15675 info_ptr += blk->size;
15676 DW_BLOCK (attr) = blk;
15678 case DW_FORM_block4:
15679 blk = dwarf_alloc_block (cu);
15680 blk->size = read_4_bytes (abfd, info_ptr);
15682 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15683 info_ptr += blk->size;
15684 DW_BLOCK (attr) = blk;
15686 case DW_FORM_data2:
15687 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
15690 case DW_FORM_data4:
15691 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
15694 case DW_FORM_data8:
15695 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
15698 case DW_FORM_sec_offset:
15699 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
15700 info_ptr += bytes_read;
15702 case DW_FORM_string:
15703 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
15704 DW_STRING_IS_CANONICAL (attr) = 0;
15705 info_ptr += bytes_read;
15708 if (!cu->per_cu->is_dwz)
15710 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
15712 DW_STRING_IS_CANONICAL (attr) = 0;
15713 info_ptr += bytes_read;
15717 case DW_FORM_GNU_strp_alt:
15719 struct dwz_file *dwz = dwarf2_get_dwz_file ();
15720 LONGEST str_offset = read_offset (abfd, info_ptr, cu_header,
15723 DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset);
15724 DW_STRING_IS_CANONICAL (attr) = 0;
15725 info_ptr += bytes_read;
15728 case DW_FORM_exprloc:
15729 case DW_FORM_block:
15730 blk = dwarf_alloc_block (cu);
15731 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
15732 info_ptr += bytes_read;
15733 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15734 info_ptr += blk->size;
15735 DW_BLOCK (attr) = blk;
15737 case DW_FORM_block1:
15738 blk = dwarf_alloc_block (cu);
15739 blk->size = read_1_byte (abfd, info_ptr);
15741 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
15742 info_ptr += blk->size;
15743 DW_BLOCK (attr) = blk;
15745 case DW_FORM_data1:
15746 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
15750 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
15753 case DW_FORM_flag_present:
15754 DW_UNSND (attr) = 1;
15756 case DW_FORM_sdata:
15757 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
15758 info_ptr += bytes_read;
15760 case DW_FORM_udata:
15761 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
15762 info_ptr += bytes_read;
15765 DW_UNSND (attr) = (cu->header.offset.sect_off
15766 + read_1_byte (abfd, info_ptr));
15770 DW_UNSND (attr) = (cu->header.offset.sect_off
15771 + read_2_bytes (abfd, info_ptr));
15775 DW_UNSND (attr) = (cu->header.offset.sect_off
15776 + read_4_bytes (abfd, info_ptr));
15780 DW_UNSND (attr) = (cu->header.offset.sect_off
15781 + read_8_bytes (abfd, info_ptr));
15784 case DW_FORM_ref_sig8:
15785 DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr);
15788 case DW_FORM_ref_udata:
15789 DW_UNSND (attr) = (cu->header.offset.sect_off
15790 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
15791 info_ptr += bytes_read;
15793 case DW_FORM_indirect:
15794 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
15795 info_ptr += bytes_read;
15796 info_ptr = read_attribute_value (reader, attr, form, info_ptr);
15798 case DW_FORM_GNU_addr_index:
15799 if (reader->dwo_file == NULL)
15801 /* For now flag a hard error.
15802 Later we can turn this into a complaint. */
15803 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
15804 dwarf_form_name (form),
15805 bfd_get_filename (abfd));
15807 DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read);
15808 info_ptr += bytes_read;
15810 case DW_FORM_GNU_str_index:
15811 if (reader->dwo_file == NULL)
15813 /* For now flag a hard error.
15814 Later we can turn this into a complaint if warranted. */
15815 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
15816 dwarf_form_name (form),
15817 bfd_get_filename (abfd));
15820 ULONGEST str_index =
15821 read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
15823 DW_STRING (attr) = read_str_index (reader, cu, str_index);
15824 DW_STRING_IS_CANONICAL (attr) = 0;
15825 info_ptr += bytes_read;
15829 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
15830 dwarf_form_name (form),
15831 bfd_get_filename (abfd));
15835 if (cu->per_cu->is_dwz && attr_form_is_ref (attr))
15836 attr->form = DW_FORM_GNU_ref_alt;
15838 /* We have seen instances where the compiler tried to emit a byte
15839 size attribute of -1 which ended up being encoded as an unsigned
15840 0xffffffff. Although 0xffffffff is technically a valid size value,
15841 an object of this size seems pretty unlikely so we can relatively
15842 safely treat these cases as if the size attribute was invalid and
15843 treat them as zero by default. */
15844 if (attr->name == DW_AT_byte_size
15845 && form == DW_FORM_data4
15846 && DW_UNSND (attr) >= 0xffffffff)
15849 (&symfile_complaints,
15850 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
15851 hex_string (DW_UNSND (attr)));
15852 DW_UNSND (attr) = 0;
15858 /* Read an attribute described by an abbreviated attribute. */
15860 static const gdb_byte *
15861 read_attribute (const struct die_reader_specs *reader,
15862 struct attribute *attr, struct attr_abbrev *abbrev,
15863 const gdb_byte *info_ptr)
15865 attr->name = abbrev->name;
15866 return read_attribute_value (reader, attr, abbrev->form, info_ptr);
15869 /* Read dwarf information from a buffer. */
15871 static unsigned int
15872 read_1_byte (bfd *abfd, const gdb_byte *buf)
15874 return bfd_get_8 (abfd, buf);
15878 read_1_signed_byte (bfd *abfd, const gdb_byte *buf)
15880 return bfd_get_signed_8 (abfd, buf);
15883 static unsigned int
15884 read_2_bytes (bfd *abfd, const gdb_byte *buf)
15886 return bfd_get_16 (abfd, buf);
15890 read_2_signed_bytes (bfd *abfd, const gdb_byte *buf)
15892 return bfd_get_signed_16 (abfd, buf);
15895 static unsigned int
15896 read_4_bytes (bfd *abfd, const gdb_byte *buf)
15898 return bfd_get_32 (abfd, buf);
15902 read_4_signed_bytes (bfd *abfd, const gdb_byte *buf)
15904 return bfd_get_signed_32 (abfd, buf);
15908 read_8_bytes (bfd *abfd, const gdb_byte *buf)
15910 return bfd_get_64 (abfd, buf);
15914 read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu,
15915 unsigned int *bytes_read)
15917 struct comp_unit_head *cu_header = &cu->header;
15918 CORE_ADDR retval = 0;
15920 if (cu_header->signed_addr_p)
15922 switch (cu_header->addr_size)
15925 retval = bfd_get_signed_16 (abfd, buf);
15928 retval = bfd_get_signed_32 (abfd, buf);
15931 retval = bfd_get_signed_64 (abfd, buf);
15934 internal_error (__FILE__, __LINE__,
15935 _("read_address: bad switch, signed [in module %s]"),
15936 bfd_get_filename (abfd));
15941 switch (cu_header->addr_size)
15944 retval = bfd_get_16 (abfd, buf);
15947 retval = bfd_get_32 (abfd, buf);
15950 retval = bfd_get_64 (abfd, buf);
15953 internal_error (__FILE__, __LINE__,
15954 _("read_address: bad switch, "
15955 "unsigned [in module %s]"),
15956 bfd_get_filename (abfd));
15960 *bytes_read = cu_header->addr_size;
15964 /* Read the initial length from a section. The (draft) DWARF 3
15965 specification allows the initial length to take up either 4 bytes
15966 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
15967 bytes describe the length and all offsets will be 8 bytes in length
15970 An older, non-standard 64-bit format is also handled by this
15971 function. The older format in question stores the initial length
15972 as an 8-byte quantity without an escape value. Lengths greater
15973 than 2^32 aren't very common which means that the initial 4 bytes
15974 is almost always zero. Since a length value of zero doesn't make
15975 sense for the 32-bit format, this initial zero can be considered to
15976 be an escape value which indicates the presence of the older 64-bit
15977 format. As written, the code can't detect (old format) lengths
15978 greater than 4GB. If it becomes necessary to handle lengths
15979 somewhat larger than 4GB, we could allow other small values (such
15980 as the non-sensical values of 1, 2, and 3) to also be used as
15981 escape values indicating the presence of the old format.
15983 The value returned via bytes_read should be used to increment the
15984 relevant pointer after calling read_initial_length().
15986 [ Note: read_initial_length() and read_offset() are based on the
15987 document entitled "DWARF Debugging Information Format", revision
15988 3, draft 8, dated November 19, 2001. This document was obtained
15991 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
15993 This document is only a draft and is subject to change. (So beware.)
15995 Details regarding the older, non-standard 64-bit format were
15996 determined empirically by examining 64-bit ELF files produced by
15997 the SGI toolchain on an IRIX 6.5 machine.
15999 - Kevin, July 16, 2002
16003 read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read)
16005 LONGEST length = bfd_get_32 (abfd, buf);
16007 if (length == 0xffffffff)
16009 length = bfd_get_64 (abfd, buf + 4);
16012 else if (length == 0)
16014 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16015 length = bfd_get_64 (abfd, buf);
16026 /* Cover function for read_initial_length.
16027 Returns the length of the object at BUF, and stores the size of the
16028 initial length in *BYTES_READ and stores the size that offsets will be in
16030 If the initial length size is not equivalent to that specified in
16031 CU_HEADER then issue a complaint.
16032 This is useful when reading non-comp-unit headers. */
16035 read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf,
16036 const struct comp_unit_head *cu_header,
16037 unsigned int *bytes_read,
16038 unsigned int *offset_size)
16040 LONGEST length = read_initial_length (abfd, buf, bytes_read);
16042 gdb_assert (cu_header->initial_length_size == 4
16043 || cu_header->initial_length_size == 8
16044 || cu_header->initial_length_size == 12);
16046 if (cu_header->initial_length_size != *bytes_read)
16047 complaint (&symfile_complaints,
16048 _("intermixed 32-bit and 64-bit DWARF sections"));
16050 *offset_size = (*bytes_read == 4) ? 4 : 8;
16054 /* Read an offset from the data stream. The size of the offset is
16055 given by cu_header->offset_size. */
16058 read_offset (bfd *abfd, const gdb_byte *buf,
16059 const struct comp_unit_head *cu_header,
16060 unsigned int *bytes_read)
16062 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
16064 *bytes_read = cu_header->offset_size;
16068 /* Read an offset from the data stream. */
16071 read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size)
16073 LONGEST retval = 0;
16075 switch (offset_size)
16078 retval = bfd_get_32 (abfd, buf);
16081 retval = bfd_get_64 (abfd, buf);
16084 internal_error (__FILE__, __LINE__,
16085 _("read_offset_1: bad switch [in module %s]"),
16086 bfd_get_filename (abfd));
16092 static const gdb_byte *
16093 read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size)
16095 /* If the size of a host char is 8 bits, we can return a pointer
16096 to the buffer, otherwise we have to copy the data to a buffer
16097 allocated on the temporary obstack. */
16098 gdb_assert (HOST_CHAR_BIT == 8);
16102 static const char *
16103 read_direct_string (bfd *abfd, const gdb_byte *buf,
16104 unsigned int *bytes_read_ptr)
16106 /* If the size of a host char is 8 bits, we can return a pointer
16107 to the string, otherwise we have to copy the string to a buffer
16108 allocated on the temporary obstack. */
16109 gdb_assert (HOST_CHAR_BIT == 8);
16112 *bytes_read_ptr = 1;
16115 *bytes_read_ptr = strlen ((const char *) buf) + 1;
16116 return (const char *) buf;
16119 static const char *
16120 read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset)
16122 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
16123 if (dwarf2_per_objfile->str.buffer == NULL)
16124 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16125 bfd_get_filename (abfd));
16126 if (str_offset >= dwarf2_per_objfile->str.size)
16127 error (_("DW_FORM_strp pointing outside of "
16128 ".debug_str section [in module %s]"),
16129 bfd_get_filename (abfd));
16130 gdb_assert (HOST_CHAR_BIT == 8);
16131 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
16133 return (const char *) (dwarf2_per_objfile->str.buffer + str_offset);
16136 /* Read a string at offset STR_OFFSET in the .debug_str section from
16137 the .dwz file DWZ. Throw an error if the offset is too large. If
16138 the string consists of a single NUL byte, return NULL; otherwise
16139 return a pointer to the string. */
16141 static const char *
16142 read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset)
16144 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str);
16146 if (dwz->str.buffer == NULL)
16147 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16148 "section [in module %s]"),
16149 bfd_get_filename (dwz->dwz_bfd));
16150 if (str_offset >= dwz->str.size)
16151 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16152 ".debug_str section [in module %s]"),
16153 bfd_get_filename (dwz->dwz_bfd));
16154 gdb_assert (HOST_CHAR_BIT == 8);
16155 if (dwz->str.buffer[str_offset] == '\0')
16157 return (const char *) (dwz->str.buffer + str_offset);
16160 static const char *
16161 read_indirect_string (bfd *abfd, const gdb_byte *buf,
16162 const struct comp_unit_head *cu_header,
16163 unsigned int *bytes_read_ptr)
16165 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
16167 return read_indirect_string_at_offset (abfd, str_offset);
16171 read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf,
16172 unsigned int *bytes_read_ptr)
16175 unsigned int num_read;
16177 unsigned char byte;
16185 byte = bfd_get_8 (abfd, buf);
16188 result |= ((ULONGEST) (byte & 127) << shift);
16189 if ((byte & 128) == 0)
16195 *bytes_read_ptr = num_read;
16200 read_signed_leb128 (bfd *abfd, const gdb_byte *buf,
16201 unsigned int *bytes_read_ptr)
16204 int i, shift, num_read;
16205 unsigned char byte;
16213 byte = bfd_get_8 (abfd, buf);
16216 result |= ((LONGEST) (byte & 127) << shift);
16218 if ((byte & 128) == 0)
16223 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
16224 result |= -(((LONGEST) 1) << shift);
16225 *bytes_read_ptr = num_read;
16229 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16230 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16231 ADDR_SIZE is the size of addresses from the CU header. */
16234 read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size)
16236 struct objfile *objfile = dwarf2_per_objfile->objfile;
16237 bfd *abfd = objfile->obfd;
16238 const gdb_byte *info_ptr;
16240 dwarf2_read_section (objfile, &dwarf2_per_objfile->addr);
16241 if (dwarf2_per_objfile->addr.buffer == NULL)
16242 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16243 objfile_name (objfile));
16244 if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size)
16245 error (_("DW_FORM_addr_index pointing outside of "
16246 ".debug_addr section [in module %s]"),
16247 objfile_name (objfile));
16248 info_ptr = (dwarf2_per_objfile->addr.buffer
16249 + addr_base + addr_index * addr_size);
16250 if (addr_size == 4)
16251 return bfd_get_32 (abfd, info_ptr);
16253 return bfd_get_64 (abfd, info_ptr);
16256 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16259 read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index)
16261 return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size);
16264 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16267 read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr,
16268 unsigned int *bytes_read)
16270 bfd *abfd = cu->objfile->obfd;
16271 unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
16273 return read_addr_index (cu, addr_index);
16276 /* Data structure to pass results from dwarf2_read_addr_index_reader
16277 back to dwarf2_read_addr_index. */
16279 struct dwarf2_read_addr_index_data
16281 ULONGEST addr_base;
16285 /* die_reader_func for dwarf2_read_addr_index. */
16288 dwarf2_read_addr_index_reader (const struct die_reader_specs *reader,
16289 const gdb_byte *info_ptr,
16290 struct die_info *comp_unit_die,
16294 struct dwarf2_cu *cu = reader->cu;
16295 struct dwarf2_read_addr_index_data *aidata =
16296 (struct dwarf2_read_addr_index_data *) data;
16298 aidata->addr_base = cu->addr_base;
16299 aidata->addr_size = cu->header.addr_size;
16302 /* Given an index in .debug_addr, fetch the value.
16303 NOTE: This can be called during dwarf expression evaluation,
16304 long after the debug information has been read, and thus per_cu->cu
16305 may no longer exist. */
16308 dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
16309 unsigned int addr_index)
16311 struct objfile *objfile = per_cu->objfile;
16312 struct dwarf2_cu *cu = per_cu->cu;
16313 ULONGEST addr_base;
16316 /* This is intended to be called from outside this file. */
16317 dw2_setup (objfile);
16319 /* We need addr_base and addr_size.
16320 If we don't have PER_CU->cu, we have to get it.
16321 Nasty, but the alternative is storing the needed info in PER_CU,
16322 which at this point doesn't seem justified: it's not clear how frequently
16323 it would get used and it would increase the size of every PER_CU.
16324 Entry points like dwarf2_per_cu_addr_size do a similar thing
16325 so we're not in uncharted territory here.
16326 Alas we need to be a bit more complicated as addr_base is contained
16329 We don't need to read the entire CU(/TU).
16330 We just need the header and top level die.
16332 IWBN to use the aging mechanism to let us lazily later discard the CU.
16333 For now we skip this optimization. */
16337 addr_base = cu->addr_base;
16338 addr_size = cu->header.addr_size;
16342 struct dwarf2_read_addr_index_data aidata;
16344 /* Note: We can't use init_cutu_and_read_dies_simple here,
16345 we need addr_base. */
16346 init_cutu_and_read_dies (per_cu, NULL, 0, 0,
16347 dwarf2_read_addr_index_reader, &aidata);
16348 addr_base = aidata.addr_base;
16349 addr_size = aidata.addr_size;
16352 return read_addr_index_1 (addr_index, addr_base, addr_size);
16355 /* Given a DW_FORM_GNU_str_index, fetch the string.
16356 This is only used by the Fission support. */
16358 static const char *
16359 read_str_index (const struct die_reader_specs *reader,
16360 struct dwarf2_cu *cu, ULONGEST str_index)
16362 struct objfile *objfile = dwarf2_per_objfile->objfile;
16363 const char *dwo_name = objfile_name (objfile);
16364 bfd *abfd = objfile->obfd;
16365 struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str;
16366 struct dwarf2_section_info *str_offsets_section =
16367 &reader->dwo_file->sections.str_offsets;
16368 const gdb_byte *info_ptr;
16369 ULONGEST str_offset;
16370 static const char form_name[] = "DW_FORM_GNU_str_index";
16372 dwarf2_read_section (objfile, str_section);
16373 dwarf2_read_section (objfile, str_offsets_section);
16374 if (str_section->buffer == NULL)
16375 error (_("%s used without .debug_str.dwo section"
16376 " in CU at offset 0x%lx [in module %s]"),
16377 form_name, (long) cu->header.offset.sect_off, dwo_name);
16378 if (str_offsets_section->buffer == NULL)
16379 error (_("%s used without .debug_str_offsets.dwo section"
16380 " in CU at offset 0x%lx [in module %s]"),
16381 form_name, (long) cu->header.offset.sect_off, dwo_name);
16382 if (str_index * cu->header.offset_size >= str_offsets_section->size)
16383 error (_("%s pointing outside of .debug_str_offsets.dwo"
16384 " section in CU at offset 0x%lx [in module %s]"),
16385 form_name, (long) cu->header.offset.sect_off, dwo_name);
16386 info_ptr = (str_offsets_section->buffer
16387 + str_index * cu->header.offset_size);
16388 if (cu->header.offset_size == 4)
16389 str_offset = bfd_get_32 (abfd, info_ptr);
16391 str_offset = bfd_get_64 (abfd, info_ptr);
16392 if (str_offset >= str_section->size)
16393 error (_("Offset from %s pointing outside of"
16394 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16395 form_name, (long) cu->header.offset.sect_off, dwo_name);
16396 return (const char *) (str_section->buffer + str_offset);
16399 /* Return the length of an LEB128 number in BUF. */
16402 leb128_size (const gdb_byte *buf)
16404 const gdb_byte *begin = buf;
16410 if ((byte & 128) == 0)
16411 return buf - begin;
16416 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
16424 cu->language = language_c;
16426 case DW_LANG_C_plus_plus:
16427 cu->language = language_cplus;
16430 cu->language = language_d;
16432 case DW_LANG_Fortran77:
16433 case DW_LANG_Fortran90:
16434 case DW_LANG_Fortran95:
16435 cu->language = language_fortran;
16438 cu->language = language_go;
16440 case DW_LANG_Mips_Assembler:
16441 cu->language = language_asm;
16444 cu->language = language_java;
16446 case DW_LANG_Ada83:
16447 case DW_LANG_Ada95:
16448 cu->language = language_ada;
16450 case DW_LANG_Modula2:
16451 cu->language = language_m2;
16453 case DW_LANG_Pascal83:
16454 cu->language = language_pascal;
16457 cu->language = language_objc;
16459 case DW_LANG_Cobol74:
16460 case DW_LANG_Cobol85:
16462 cu->language = language_minimal;
16465 cu->language_defn = language_def (cu->language);
16468 /* Return the named attribute or NULL if not there. */
16470 static struct attribute *
16471 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
16476 struct attribute *spec = NULL;
16478 for (i = 0; i < die->num_attrs; ++i)
16480 if (die->attrs[i].name == name)
16481 return &die->attrs[i];
16482 if (die->attrs[i].name == DW_AT_specification
16483 || die->attrs[i].name == DW_AT_abstract_origin)
16484 spec = &die->attrs[i];
16490 die = follow_die_ref (die, spec, &cu);
16496 /* Return the named attribute or NULL if not there,
16497 but do not follow DW_AT_specification, etc.
16498 This is for use in contexts where we're reading .debug_types dies.
16499 Following DW_AT_specification, DW_AT_abstract_origin will take us
16500 back up the chain, and we want to go down. */
16502 static struct attribute *
16503 dwarf2_attr_no_follow (struct die_info *die, unsigned int name)
16507 for (i = 0; i < die->num_attrs; ++i)
16508 if (die->attrs[i].name == name)
16509 return &die->attrs[i];
16514 /* Return non-zero iff the attribute NAME is defined for the given DIE,
16515 and holds a non-zero value. This function should only be used for
16516 DW_FORM_flag or DW_FORM_flag_present attributes. */
16519 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
16521 struct attribute *attr = dwarf2_attr (die, name, cu);
16523 return (attr && DW_UNSND (attr));
16527 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
16529 /* A DIE is a declaration if it has a DW_AT_declaration attribute
16530 which value is non-zero. However, we have to be careful with
16531 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
16532 (via dwarf2_flag_true_p) follows this attribute. So we may
16533 end up accidently finding a declaration attribute that belongs
16534 to a different DIE referenced by the specification attribute,
16535 even though the given DIE does not have a declaration attribute. */
16536 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
16537 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
16540 /* Return the die giving the specification for DIE, if there is
16541 one. *SPEC_CU is the CU containing DIE on input, and the CU
16542 containing the return value on output. If there is no
16543 specification, but there is an abstract origin, that is
16546 static struct die_info *
16547 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
16549 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
16552 if (spec_attr == NULL)
16553 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
16555 if (spec_attr == NULL)
16558 return follow_die_ref (die, spec_attr, spec_cu);
16561 /* Free the line_header structure *LH, and any arrays and strings it
16563 NOTE: This is also used as a "cleanup" function. */
16566 free_line_header (struct line_header *lh)
16568 if (lh->standard_opcode_lengths)
16569 xfree (lh->standard_opcode_lengths);
16571 /* Remember that all the lh->file_names[i].name pointers are
16572 pointers into debug_line_buffer, and don't need to be freed. */
16573 if (lh->file_names)
16574 xfree (lh->file_names);
16576 /* Similarly for the include directory names. */
16577 if (lh->include_dirs)
16578 xfree (lh->include_dirs);
16583 /* Add an entry to LH's include directory table. */
16586 add_include_dir (struct line_header *lh, const char *include_dir)
16588 /* Grow the array if necessary. */
16589 if (lh->include_dirs_size == 0)
16591 lh->include_dirs_size = 1; /* for testing */
16592 lh->include_dirs = xmalloc (lh->include_dirs_size
16593 * sizeof (*lh->include_dirs));
16595 else if (lh->num_include_dirs >= lh->include_dirs_size)
16597 lh->include_dirs_size *= 2;
16598 lh->include_dirs = xrealloc (lh->include_dirs,
16599 (lh->include_dirs_size
16600 * sizeof (*lh->include_dirs)));
16603 lh->include_dirs[lh->num_include_dirs++] = include_dir;
16606 /* Add an entry to LH's file name table. */
16609 add_file_name (struct line_header *lh,
16611 unsigned int dir_index,
16612 unsigned int mod_time,
16613 unsigned int length)
16615 struct file_entry *fe;
16617 /* Grow the array if necessary. */
16618 if (lh->file_names_size == 0)
16620 lh->file_names_size = 1; /* for testing */
16621 lh->file_names = xmalloc (lh->file_names_size
16622 * sizeof (*lh->file_names));
16624 else if (lh->num_file_names >= lh->file_names_size)
16626 lh->file_names_size *= 2;
16627 lh->file_names = xrealloc (lh->file_names,
16628 (lh->file_names_size
16629 * sizeof (*lh->file_names)));
16632 fe = &lh->file_names[lh->num_file_names++];
16634 fe->dir_index = dir_index;
16635 fe->mod_time = mod_time;
16636 fe->length = length;
16637 fe->included_p = 0;
16641 /* A convenience function to find the proper .debug_line section for a
16644 static struct dwarf2_section_info *
16645 get_debug_line_section (struct dwarf2_cu *cu)
16647 struct dwarf2_section_info *section;
16649 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
16651 if (cu->dwo_unit && cu->per_cu->is_debug_types)
16652 section = &cu->dwo_unit->dwo_file->sections.line;
16653 else if (cu->per_cu->is_dwz)
16655 struct dwz_file *dwz = dwarf2_get_dwz_file ();
16657 section = &dwz->line;
16660 section = &dwarf2_per_objfile->line;
16665 /* Read the statement program header starting at OFFSET in
16666 .debug_line, or .debug_line.dwo. Return a pointer
16667 to a struct line_header, allocated using xmalloc.
16669 NOTE: the strings in the include directory and file name tables of
16670 the returned object point into the dwarf line section buffer,
16671 and must not be freed. */
16673 static struct line_header *
16674 dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu)
16676 struct cleanup *back_to;
16677 struct line_header *lh;
16678 const gdb_byte *line_ptr;
16679 unsigned int bytes_read, offset_size;
16681 const char *cur_dir, *cur_file;
16682 struct dwarf2_section_info *section;
16685 section = get_debug_line_section (cu);
16686 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
16687 if (section->buffer == NULL)
16689 if (cu->dwo_unit && cu->per_cu->is_debug_types)
16690 complaint (&symfile_complaints, _("missing .debug_line.dwo section"));
16692 complaint (&symfile_complaints, _("missing .debug_line section"));
16696 /* We can't do this until we know the section is non-empty.
16697 Only then do we know we have such a section. */
16698 abfd = get_section_bfd_owner (section);
16700 /* Make sure that at least there's room for the total_length field.
16701 That could be 12 bytes long, but we're just going to fudge that. */
16702 if (offset + 4 >= section->size)
16704 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16708 lh = xmalloc (sizeof (*lh));
16709 memset (lh, 0, sizeof (*lh));
16710 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
16713 line_ptr = section->buffer + offset;
16715 /* Read in the header. */
16717 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
16718 &bytes_read, &offset_size);
16719 line_ptr += bytes_read;
16720 if (line_ptr + lh->total_length > (section->buffer + section->size))
16722 dwarf2_statement_list_fits_in_line_number_section_complaint ();
16723 do_cleanups (back_to);
16726 lh->statement_program_end = line_ptr + lh->total_length;
16727 lh->version = read_2_bytes (abfd, line_ptr);
16729 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
16730 line_ptr += offset_size;
16731 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
16733 if (lh->version >= 4)
16735 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
16739 lh->maximum_ops_per_instruction = 1;
16741 if (lh->maximum_ops_per_instruction == 0)
16743 lh->maximum_ops_per_instruction = 1;
16744 complaint (&symfile_complaints,
16745 _("invalid maximum_ops_per_instruction "
16746 "in `.debug_line' section"));
16749 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
16751 lh->line_base = read_1_signed_byte (abfd, line_ptr);
16753 lh->line_range = read_1_byte (abfd, line_ptr);
16755 lh->opcode_base = read_1_byte (abfd, line_ptr);
16757 lh->standard_opcode_lengths
16758 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
16760 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
16761 for (i = 1; i < lh->opcode_base; ++i)
16763 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
16767 /* Read directory table. */
16768 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
16770 line_ptr += bytes_read;
16771 add_include_dir (lh, cur_dir);
16773 line_ptr += bytes_read;
16775 /* Read file name table. */
16776 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
16778 unsigned int dir_index, mod_time, length;
16780 line_ptr += bytes_read;
16781 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
16782 line_ptr += bytes_read;
16783 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
16784 line_ptr += bytes_read;
16785 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
16786 line_ptr += bytes_read;
16788 add_file_name (lh, cur_file, dir_index, mod_time, length);
16790 line_ptr += bytes_read;
16791 lh->statement_program_start = line_ptr;
16793 if (line_ptr > (section->buffer + section->size))
16794 complaint (&symfile_complaints,
16795 _("line number info header doesn't "
16796 "fit in `.debug_line' section"));
16798 discard_cleanups (back_to);
16802 /* Subroutine of dwarf_decode_lines to simplify it.
16803 Return the file name of the psymtab for included file FILE_INDEX
16804 in line header LH of PST.
16805 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
16806 If space for the result is malloc'd, it will be freed by a cleanup.
16807 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
16809 The function creates dangling cleanup registration. */
16811 static const char *
16812 psymtab_include_file_name (const struct line_header *lh, int file_index,
16813 const struct partial_symtab *pst,
16814 const char *comp_dir)
16816 const struct file_entry fe = lh->file_names [file_index];
16817 const char *include_name = fe.name;
16818 const char *include_name_to_compare = include_name;
16819 const char *dir_name = NULL;
16820 const char *pst_filename;
16821 char *copied_name = NULL;
16825 dir_name = lh->include_dirs[fe.dir_index - 1];
16827 if (!IS_ABSOLUTE_PATH (include_name)
16828 && (dir_name != NULL || comp_dir != NULL))
16830 /* Avoid creating a duplicate psymtab for PST.
16831 We do this by comparing INCLUDE_NAME and PST_FILENAME.
16832 Before we do the comparison, however, we need to account
16833 for DIR_NAME and COMP_DIR.
16834 First prepend dir_name (if non-NULL). If we still don't
16835 have an absolute path prepend comp_dir (if non-NULL).
16836 However, the directory we record in the include-file's
16837 psymtab does not contain COMP_DIR (to match the
16838 corresponding symtab(s)).
16843 bash$ gcc -g ./hello.c
16844 include_name = "hello.c"
16846 DW_AT_comp_dir = comp_dir = "/tmp"
16847 DW_AT_name = "./hello.c" */
16849 if (dir_name != NULL)
16851 char *tem = concat (dir_name, SLASH_STRING,
16852 include_name, (char *)NULL);
16854 make_cleanup (xfree, tem);
16855 include_name = tem;
16856 include_name_to_compare = include_name;
16858 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
16860 char *tem = concat (comp_dir, SLASH_STRING,
16861 include_name, (char *)NULL);
16863 make_cleanup (xfree, tem);
16864 include_name_to_compare = tem;
16868 pst_filename = pst->filename;
16869 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
16871 copied_name = concat (pst->dirname, SLASH_STRING,
16872 pst_filename, (char *)NULL);
16873 pst_filename = copied_name;
16876 file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
16878 if (copied_name != NULL)
16879 xfree (copied_name);
16883 return include_name;
16886 /* Ignore this record_line request. */
16889 noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc)
16894 /* Subroutine of dwarf_decode_lines to simplify it.
16895 Process the line number information in LH. */
16898 dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir,
16899 struct dwarf2_cu *cu, struct partial_symtab *pst)
16901 const gdb_byte *line_ptr, *extended_end;
16902 const gdb_byte *line_end;
16903 unsigned int bytes_read, extended_len;
16904 unsigned char op_code, extended_op, adj_opcode;
16905 CORE_ADDR baseaddr;
16906 struct objfile *objfile = cu->objfile;
16907 bfd *abfd = objfile->obfd;
16908 struct gdbarch *gdbarch = get_objfile_arch (objfile);
16909 const int decode_for_pst_p = (pst != NULL);
16910 struct subfile *last_subfile = NULL;
16911 void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc)
16914 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
16916 line_ptr = lh->statement_program_start;
16917 line_end = lh->statement_program_end;
16919 /* Read the statement sequences until there's nothing left. */
16920 while (line_ptr < line_end)
16922 /* state machine registers */
16923 CORE_ADDR address = 0;
16924 unsigned int file = 1;
16925 unsigned int line = 1;
16926 unsigned int column = 0;
16927 int is_stmt = lh->default_is_stmt;
16928 int basic_block = 0;
16929 int end_sequence = 0;
16931 unsigned char op_index = 0;
16933 if (!decode_for_pst_p && lh->num_file_names >= file)
16935 /* Start a subfile for the current file of the state machine. */
16936 /* lh->include_dirs and lh->file_names are 0-based, but the
16937 directory and file name numbers in the statement program
16939 struct file_entry *fe = &lh->file_names[file - 1];
16940 const char *dir = NULL;
16943 dir = lh->include_dirs[fe->dir_index - 1];
16945 dwarf2_start_subfile (fe->name, dir, comp_dir);
16948 /* Decode the table. */
16949 while (!end_sequence)
16951 op_code = read_1_byte (abfd, line_ptr);
16953 if (line_ptr > line_end)
16955 dwarf2_debug_line_missing_end_sequence_complaint ();
16959 if (op_code >= lh->opcode_base)
16961 /* Special operand. */
16962 adj_opcode = op_code - lh->opcode_base;
16963 address += (((op_index + (adj_opcode / lh->line_range))
16964 / lh->maximum_ops_per_instruction)
16965 * lh->minimum_instruction_length);
16966 op_index = ((op_index + (adj_opcode / lh->line_range))
16967 % lh->maximum_ops_per_instruction);
16968 line += lh->line_base + (adj_opcode % lh->line_range);
16969 if (lh->num_file_names < file || file == 0)
16970 dwarf2_debug_line_missing_file_complaint ();
16971 /* For now we ignore lines not starting on an
16972 instruction boundary. */
16973 else if (op_index == 0)
16975 lh->file_names[file - 1].included_p = 1;
16976 if (!decode_for_pst_p && is_stmt)
16978 if (last_subfile != current_subfile)
16980 addr = gdbarch_addr_bits_remove (gdbarch, address);
16982 (*p_record_line) (last_subfile, 0, addr);
16983 last_subfile = current_subfile;
16985 /* Append row to matrix using current values. */
16986 addr = gdbarch_addr_bits_remove (gdbarch, address);
16987 (*p_record_line) (current_subfile, line, addr);
16992 else switch (op_code)
16994 case DW_LNS_extended_op:
16995 extended_len = read_unsigned_leb128 (abfd, line_ptr,
16997 line_ptr += bytes_read;
16998 extended_end = line_ptr + extended_len;
16999 extended_op = read_1_byte (abfd, line_ptr);
17001 switch (extended_op)
17003 case DW_LNE_end_sequence:
17004 p_record_line = record_line;
17007 case DW_LNE_set_address:
17008 address = read_address (abfd, line_ptr, cu, &bytes_read);
17010 if (address == 0 && !dwarf2_per_objfile->has_section_at_zero)
17012 /* This line table is for a function which has been
17013 GCd by the linker. Ignore it. PR gdb/12528 */
17016 = line_ptr - get_debug_line_section (cu)->buffer;
17018 complaint (&symfile_complaints,
17019 _(".debug_line address at offset 0x%lx is 0 "
17021 line_offset, objfile_name (objfile));
17022 p_record_line = noop_record_line;
17026 line_ptr += bytes_read;
17027 address += baseaddr;
17029 case DW_LNE_define_file:
17031 const char *cur_file;
17032 unsigned int dir_index, mod_time, length;
17034 cur_file = read_direct_string (abfd, line_ptr,
17036 line_ptr += bytes_read;
17038 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17039 line_ptr += bytes_read;
17041 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17042 line_ptr += bytes_read;
17044 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17045 line_ptr += bytes_read;
17046 add_file_name (lh, cur_file, dir_index, mod_time, length);
17049 case DW_LNE_set_discriminator:
17050 /* The discriminator is not interesting to the debugger;
17052 line_ptr = extended_end;
17055 complaint (&symfile_complaints,
17056 _("mangled .debug_line section"));
17059 /* Make sure that we parsed the extended op correctly. If e.g.
17060 we expected a different address size than the producer used,
17061 we may have read the wrong number of bytes. */
17062 if (line_ptr != extended_end)
17064 complaint (&symfile_complaints,
17065 _("mangled .debug_line section"));
17070 if (lh->num_file_names < file || file == 0)
17071 dwarf2_debug_line_missing_file_complaint ();
17074 lh->file_names[file - 1].included_p = 1;
17075 if (!decode_for_pst_p && is_stmt)
17077 if (last_subfile != current_subfile)
17079 addr = gdbarch_addr_bits_remove (gdbarch, address);
17081 (*p_record_line) (last_subfile, 0, addr);
17082 last_subfile = current_subfile;
17084 addr = gdbarch_addr_bits_remove (gdbarch, address);
17085 (*p_record_line) (current_subfile, line, addr);
17090 case DW_LNS_advance_pc:
17093 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17095 address += (((op_index + adjust)
17096 / lh->maximum_ops_per_instruction)
17097 * lh->minimum_instruction_length);
17098 op_index = ((op_index + adjust)
17099 % lh->maximum_ops_per_instruction);
17100 line_ptr += bytes_read;
17103 case DW_LNS_advance_line:
17104 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
17105 line_ptr += bytes_read;
17107 case DW_LNS_set_file:
17109 /* The arrays lh->include_dirs and lh->file_names are
17110 0-based, but the directory and file name numbers in
17111 the statement program are 1-based. */
17112 struct file_entry *fe;
17113 const char *dir = NULL;
17115 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17116 line_ptr += bytes_read;
17117 if (lh->num_file_names < file || file == 0)
17118 dwarf2_debug_line_missing_file_complaint ();
17121 fe = &lh->file_names[file - 1];
17123 dir = lh->include_dirs[fe->dir_index - 1];
17124 if (!decode_for_pst_p)
17126 last_subfile = current_subfile;
17127 dwarf2_start_subfile (fe->name, dir, comp_dir);
17132 case DW_LNS_set_column:
17133 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17134 line_ptr += bytes_read;
17136 case DW_LNS_negate_stmt:
17137 is_stmt = (!is_stmt);
17139 case DW_LNS_set_basic_block:
17142 /* Add to the address register of the state machine the
17143 address increment value corresponding to special opcode
17144 255. I.e., this value is scaled by the minimum
17145 instruction length since special opcode 255 would have
17146 scaled the increment. */
17147 case DW_LNS_const_add_pc:
17149 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
17151 address += (((op_index + adjust)
17152 / lh->maximum_ops_per_instruction)
17153 * lh->minimum_instruction_length);
17154 op_index = ((op_index + adjust)
17155 % lh->maximum_ops_per_instruction);
17158 case DW_LNS_fixed_advance_pc:
17159 address += read_2_bytes (abfd, line_ptr);
17165 /* Unknown standard opcode, ignore it. */
17168 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
17170 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
17171 line_ptr += bytes_read;
17176 if (lh->num_file_names < file || file == 0)
17177 dwarf2_debug_line_missing_file_complaint ();
17180 lh->file_names[file - 1].included_p = 1;
17181 if (!decode_for_pst_p)
17183 addr = gdbarch_addr_bits_remove (gdbarch, address);
17184 (*p_record_line) (current_subfile, 0, addr);
17190 /* Decode the Line Number Program (LNP) for the given line_header
17191 structure and CU. The actual information extracted and the type
17192 of structures created from the LNP depends on the value of PST.
17194 1. If PST is NULL, then this procedure uses the data from the program
17195 to create all necessary symbol tables, and their linetables.
17197 2. If PST is not NULL, this procedure reads the program to determine
17198 the list of files included by the unit represented by PST, and
17199 builds all the associated partial symbol tables.
17201 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17202 It is used for relative paths in the line table.
17203 NOTE: When processing partial symtabs (pst != NULL),
17204 comp_dir == pst->dirname.
17206 NOTE: It is important that psymtabs have the same file name (via strcmp)
17207 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17208 symtab we don't use it in the name of the psymtabs we create.
17209 E.g. expand_line_sal requires this when finding psymtabs to expand.
17210 A good testcase for this is mb-inline.exp. */
17213 dwarf_decode_lines (struct line_header *lh, const char *comp_dir,
17214 struct dwarf2_cu *cu, struct partial_symtab *pst,
17215 int want_line_info)
17217 struct objfile *objfile = cu->objfile;
17218 const int decode_for_pst_p = (pst != NULL);
17219 struct subfile *first_subfile = current_subfile;
17221 if (want_line_info)
17222 dwarf_decode_lines_1 (lh, comp_dir, cu, pst);
17224 if (decode_for_pst_p)
17228 /* Now that we're done scanning the Line Header Program, we can
17229 create the psymtab of each included file. */
17230 for (file_index = 0; file_index < lh->num_file_names; file_index++)
17231 if (lh->file_names[file_index].included_p == 1)
17233 const char *include_name =
17234 psymtab_include_file_name (lh, file_index, pst, comp_dir);
17235 if (include_name != NULL)
17236 dwarf2_create_include_psymtab (include_name, pst, objfile);
17241 /* Make sure a symtab is created for every file, even files
17242 which contain only variables (i.e. no code with associated
17246 for (i = 0; i < lh->num_file_names; i++)
17248 const char *dir = NULL;
17249 struct file_entry *fe;
17251 fe = &lh->file_names[i];
17253 dir = lh->include_dirs[fe->dir_index - 1];
17254 dwarf2_start_subfile (fe->name, dir, comp_dir);
17256 /* Skip the main file; we don't need it, and it must be
17257 allocated last, so that it will show up before the
17258 non-primary symtabs in the objfile's symtab list. */
17259 if (current_subfile == first_subfile)
17262 if (current_subfile->symtab == NULL)
17263 current_subfile->symtab = allocate_symtab (current_subfile->name,
17265 fe->symtab = current_subfile->symtab;
17270 /* Start a subfile for DWARF. FILENAME is the name of the file and
17271 DIRNAME the name of the source directory which contains FILENAME
17272 or NULL if not known. COMP_DIR is the compilation directory for the
17273 linetable's compilation unit or NULL if not known.
17274 This routine tries to keep line numbers from identical absolute and
17275 relative file names in a common subfile.
17277 Using the `list' example from the GDB testsuite, which resides in
17278 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17279 of /srcdir/list0.c yields the following debugging information for list0.c:
17281 DW_AT_name: /srcdir/list0.c
17282 DW_AT_comp_dir: /compdir
17283 files.files[0].name: list0.h
17284 files.files[0].dir: /srcdir
17285 files.files[1].name: list0.c
17286 files.files[1].dir: /srcdir
17288 The line number information for list0.c has to end up in a single
17289 subfile, so that `break /srcdir/list0.c:1' works as expected.
17290 start_subfile will ensure that this happens provided that we pass the
17291 concatenation of files.files[1].dir and files.files[1].name as the
17295 dwarf2_start_subfile (const char *filename, const char *dirname,
17296 const char *comp_dir)
17300 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
17301 `start_symtab' will always pass the contents of DW_AT_comp_dir as
17302 second argument to start_subfile. To be consistent, we do the
17303 same here. In order not to lose the line information directory,
17304 we concatenate it to the filename when it makes sense.
17305 Note that the Dwarf3 standard says (speaking of filenames in line
17306 information): ``The directory index is ignored for file names
17307 that represent full path names''. Thus ignoring dirname in the
17308 `else' branch below isn't an issue. */
17310 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
17312 copy = concat (dirname, SLASH_STRING, filename, (char *)NULL);
17316 start_subfile (filename, comp_dir);
17322 /* Start a symtab for DWARF.
17323 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17326 dwarf2_start_symtab (struct dwarf2_cu *cu,
17327 const char *name, const char *comp_dir, CORE_ADDR low_pc)
17329 start_symtab (name, comp_dir, low_pc);
17330 record_debugformat ("DWARF 2");
17331 record_producer (cu->producer);
17333 /* We assume that we're processing GCC output. */
17334 processing_gcc_compilation = 2;
17336 cu->processing_has_namespace_info = 0;
17340 var_decode_location (struct attribute *attr, struct symbol *sym,
17341 struct dwarf2_cu *cu)
17343 struct objfile *objfile = cu->objfile;
17344 struct comp_unit_head *cu_header = &cu->header;
17346 /* NOTE drow/2003-01-30: There used to be a comment and some special
17347 code here to turn a symbol with DW_AT_external and a
17348 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
17349 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
17350 with some versions of binutils) where shared libraries could have
17351 relocations against symbols in their debug information - the
17352 minimal symbol would have the right address, but the debug info
17353 would not. It's no longer necessary, because we will explicitly
17354 apply relocations when we read in the debug information now. */
17356 /* A DW_AT_location attribute with no contents indicates that a
17357 variable has been optimized away. */
17358 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
17360 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
17364 /* Handle one degenerate form of location expression specially, to
17365 preserve GDB's previous behavior when section offsets are
17366 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
17367 then mark this symbol as LOC_STATIC. */
17369 if (attr_form_is_block (attr)
17370 && ((DW_BLOCK (attr)->data[0] == DW_OP_addr
17371 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size)
17372 || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index
17373 && (DW_BLOCK (attr)->size
17374 == 1 + leb128_size (&DW_BLOCK (attr)->data[1])))))
17376 unsigned int dummy;
17378 if (DW_BLOCK (attr)->data[0] == DW_OP_addr)
17379 SYMBOL_VALUE_ADDRESS (sym) =
17380 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
17382 SYMBOL_VALUE_ADDRESS (sym) =
17383 read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy);
17384 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
17385 fixup_symbol_section (sym, objfile);
17386 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
17387 SYMBOL_SECTION (sym));
17391 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
17392 expression evaluator, and use LOC_COMPUTED only when necessary
17393 (i.e. when the value of a register or memory location is
17394 referenced, or a thread-local block, etc.). Then again, it might
17395 not be worthwhile. I'm assuming that it isn't unless performance
17396 or memory numbers show me otherwise. */
17398 dwarf2_symbol_mark_computed (attr, sym, cu, 0);
17400 if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist)
17401 cu->has_loclist = 1;
17404 /* Given a pointer to a DWARF information entry, figure out if we need
17405 to make a symbol table entry for it, and if so, create a new entry
17406 and return a pointer to it.
17407 If TYPE is NULL, determine symbol type from the die, otherwise
17408 used the passed type.
17409 If SPACE is not NULL, use it to hold the new symbol. If it is
17410 NULL, allocate a new symbol on the objfile's obstack. */
17412 static struct symbol *
17413 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
17414 struct symbol *space)
17416 struct objfile *objfile = cu->objfile;
17417 struct symbol *sym = NULL;
17419 struct attribute *attr = NULL;
17420 struct attribute *attr2 = NULL;
17421 CORE_ADDR baseaddr;
17422 struct pending **list_to_add = NULL;
17424 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
17426 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
17428 name = dwarf2_name (die, cu);
17431 const char *linkagename;
17432 int suppress_add = 0;
17437 sym = allocate_symbol (objfile);
17438 OBJSTAT (objfile, n_syms++);
17440 /* Cache this symbol's name and the name's demangled form (if any). */
17441 SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack);
17442 linkagename = dwarf2_physname (name, die, cu);
17443 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
17445 /* Fortran does not have mangling standard and the mangling does differ
17446 between gfortran, iFort etc. */
17447 if (cu->language == language_fortran
17448 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
17449 symbol_set_demangled_name (&(sym->ginfo),
17450 dwarf2_full_name (name, die, cu),
17453 /* Default assumptions.
17454 Use the passed type or decode it from the die. */
17455 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
17456 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
17458 SYMBOL_TYPE (sym) = type;
17460 SYMBOL_TYPE (sym) = die_type (die, cu);
17461 attr = dwarf2_attr (die,
17462 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
17466 SYMBOL_LINE (sym) = DW_UNSND (attr);
17469 attr = dwarf2_attr (die,
17470 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
17474 int file_index = DW_UNSND (attr);
17476 if (cu->line_header == NULL
17477 || file_index > cu->line_header->num_file_names)
17478 complaint (&symfile_complaints,
17479 _("file index out of range"));
17480 else if (file_index > 0)
17482 struct file_entry *fe;
17484 fe = &cu->line_header->file_names[file_index - 1];
17485 SYMBOL_SYMTAB (sym) = fe->symtab;
17492 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
17495 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
17497 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
17498 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
17499 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
17500 add_symbol_to_list (sym, cu->list_in_scope);
17502 case DW_TAG_subprogram:
17503 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17505 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
17506 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17507 if ((attr2 && (DW_UNSND (attr2) != 0))
17508 || cu->language == language_ada)
17510 /* Subprograms marked external are stored as a global symbol.
17511 Ada subprograms, whether marked external or not, are always
17512 stored as a global symbol, because we want to be able to
17513 access them globally. For instance, we want to be able
17514 to break on a nested subprogram without having to
17515 specify the context. */
17516 list_to_add = &global_symbols;
17520 list_to_add = cu->list_in_scope;
17523 case DW_TAG_inlined_subroutine:
17524 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17526 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
17527 SYMBOL_INLINED (sym) = 1;
17528 list_to_add = cu->list_in_scope;
17530 case DW_TAG_template_value_param:
17532 /* Fall through. */
17533 case DW_TAG_constant:
17534 case DW_TAG_variable:
17535 case DW_TAG_member:
17536 /* Compilation with minimal debug info may result in
17537 variables with missing type entries. Change the
17538 misleading `void' type to something sensible. */
17539 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
17541 = objfile_type (objfile)->nodebug_data_symbol;
17543 attr = dwarf2_attr (die, DW_AT_const_value, cu);
17544 /* In the case of DW_TAG_member, we should only be called for
17545 static const members. */
17546 if (die->tag == DW_TAG_member)
17548 /* dwarf2_add_field uses die_is_declaration,
17549 so we do the same. */
17550 gdb_assert (die_is_declaration (die, cu));
17555 dwarf2_const_value (attr, sym, cu);
17556 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17559 if (attr2 && (DW_UNSND (attr2) != 0))
17560 list_to_add = &global_symbols;
17562 list_to_add = cu->list_in_scope;
17566 attr = dwarf2_attr (die, DW_AT_location, cu);
17569 var_decode_location (attr, sym, cu);
17570 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17572 /* Fortran explicitly imports any global symbols to the local
17573 scope by DW_TAG_common_block. */
17574 if (cu->language == language_fortran && die->parent
17575 && die->parent->tag == DW_TAG_common_block)
17578 if (SYMBOL_CLASS (sym) == LOC_STATIC
17579 && SYMBOL_VALUE_ADDRESS (sym) == 0
17580 && !dwarf2_per_objfile->has_section_at_zero)
17582 /* When a static variable is eliminated by the linker,
17583 the corresponding debug information is not stripped
17584 out, but the variable address is set to null;
17585 do not add such variables into symbol table. */
17587 else if (attr2 && (DW_UNSND (attr2) != 0))
17589 /* Workaround gfortran PR debug/40040 - it uses
17590 DW_AT_location for variables in -fPIC libraries which may
17591 get overriden by other libraries/executable and get
17592 a different address. Resolve it by the minimal symbol
17593 which may come from inferior's executable using copy
17594 relocation. Make this workaround only for gfortran as for
17595 other compilers GDB cannot guess the minimal symbol
17596 Fortran mangling kind. */
17597 if (cu->language == language_fortran && die->parent
17598 && die->parent->tag == DW_TAG_module
17600 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
17601 SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED;
17603 /* A variable with DW_AT_external is never static,
17604 but it may be block-scoped. */
17605 list_to_add = (cu->list_in_scope == &file_symbols
17606 ? &global_symbols : cu->list_in_scope);
17609 list_to_add = cu->list_in_scope;
17613 /* We do not know the address of this symbol.
17614 If it is an external symbol and we have type information
17615 for it, enter the symbol as a LOC_UNRESOLVED symbol.
17616 The address of the variable will then be determined from
17617 the minimal symbol table whenever the variable is
17619 attr2 = dwarf2_attr (die, DW_AT_external, cu);
17621 /* Fortran explicitly imports any global symbols to the local
17622 scope by DW_TAG_common_block. */
17623 if (cu->language == language_fortran && die->parent
17624 && die->parent->tag == DW_TAG_common_block)
17626 /* SYMBOL_CLASS doesn't matter here because
17627 read_common_block is going to reset it. */
17629 list_to_add = cu->list_in_scope;
17631 else if (attr2 && (DW_UNSND (attr2) != 0)
17632 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
17634 /* A variable with DW_AT_external is never static, but it
17635 may be block-scoped. */
17636 list_to_add = (cu->list_in_scope == &file_symbols
17637 ? &global_symbols : cu->list_in_scope);
17639 SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED;
17641 else if (!die_is_declaration (die, cu))
17643 /* Use the default LOC_OPTIMIZED_OUT class. */
17644 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
17646 list_to_add = cu->list_in_scope;
17650 case DW_TAG_formal_parameter:
17651 /* If we are inside a function, mark this as an argument. If
17652 not, we might be looking at an argument to an inlined function
17653 when we do not have enough information to show inlined frames;
17654 pretend it's a local variable in that case so that the user can
17656 if (context_stack_depth > 0
17657 && context_stack[context_stack_depth - 1].name != NULL)
17658 SYMBOL_IS_ARGUMENT (sym) = 1;
17659 attr = dwarf2_attr (die, DW_AT_location, cu);
17662 var_decode_location (attr, sym, cu);
17664 attr = dwarf2_attr (die, DW_AT_const_value, cu);
17667 dwarf2_const_value (attr, sym, cu);
17670 list_to_add = cu->list_in_scope;
17672 case DW_TAG_unspecified_parameters:
17673 /* From varargs functions; gdb doesn't seem to have any
17674 interest in this information, so just ignore it for now.
17677 case DW_TAG_template_type_param:
17679 /* Fall through. */
17680 case DW_TAG_class_type:
17681 case DW_TAG_interface_type:
17682 case DW_TAG_structure_type:
17683 case DW_TAG_union_type:
17684 case DW_TAG_set_type:
17685 case DW_TAG_enumeration_type:
17686 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17687 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
17690 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
17691 really ever be static objects: otherwise, if you try
17692 to, say, break of a class's method and you're in a file
17693 which doesn't mention that class, it won't work unless
17694 the check for all static symbols in lookup_symbol_aux
17695 saves you. See the OtherFileClass tests in
17696 gdb.c++/namespace.exp. */
17700 list_to_add = (cu->list_in_scope == &file_symbols
17701 && (cu->language == language_cplus
17702 || cu->language == language_java)
17703 ? &global_symbols : cu->list_in_scope);
17705 /* The semantics of C++ state that "struct foo {
17706 ... }" also defines a typedef for "foo". A Java
17707 class declaration also defines a typedef for the
17709 if (cu->language == language_cplus
17710 || cu->language == language_java
17711 || cu->language == language_ada)
17713 /* The symbol's name is already allocated along
17714 with this objfile, so we don't need to
17715 duplicate it for the type. */
17716 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
17717 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
17722 case DW_TAG_typedef:
17723 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17724 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
17725 list_to_add = cu->list_in_scope;
17727 case DW_TAG_base_type:
17728 case DW_TAG_subrange_type:
17729 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17730 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
17731 list_to_add = cu->list_in_scope;
17733 case DW_TAG_enumerator:
17734 attr = dwarf2_attr (die, DW_AT_const_value, cu);
17737 dwarf2_const_value (attr, sym, cu);
17740 /* NOTE: carlton/2003-11-10: See comment above in the
17741 DW_TAG_class_type, etc. block. */
17743 list_to_add = (cu->list_in_scope == &file_symbols
17744 && (cu->language == language_cplus
17745 || cu->language == language_java)
17746 ? &global_symbols : cu->list_in_scope);
17749 case DW_TAG_imported_declaration:
17750 case DW_TAG_namespace:
17751 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17752 list_to_add = &global_symbols;
17754 case DW_TAG_module:
17755 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
17756 SYMBOL_DOMAIN (sym) = MODULE_DOMAIN;
17757 list_to_add = &global_symbols;
17759 case DW_TAG_common_block:
17760 SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK;
17761 SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN;
17762 add_symbol_to_list (sym, cu->list_in_scope);
17765 /* Not a tag we recognize. Hopefully we aren't processing
17766 trash data, but since we must specifically ignore things
17767 we don't recognize, there is nothing else we should do at
17769 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
17770 dwarf_tag_name (die->tag));
17776 sym->hash_next = objfile->template_symbols;
17777 objfile->template_symbols = sym;
17778 list_to_add = NULL;
17781 if (list_to_add != NULL)
17782 add_symbol_to_list (sym, list_to_add);
17784 /* For the benefit of old versions of GCC, check for anonymous
17785 namespaces based on the demangled name. */
17786 if (!cu->processing_has_namespace_info
17787 && cu->language == language_cplus)
17788 cp_scan_for_anonymous_namespaces (sym, objfile);
17793 /* A wrapper for new_symbol_full that always allocates a new symbol. */
17795 static struct symbol *
17796 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
17798 return new_symbol_full (die, type, cu, NULL);
17801 /* Given an attr with a DW_FORM_dataN value in host byte order,
17802 zero-extend it as appropriate for the symbol's type. The DWARF
17803 standard (v4) is not entirely clear about the meaning of using
17804 DW_FORM_dataN for a constant with a signed type, where the type is
17805 wider than the data. The conclusion of a discussion on the DWARF
17806 list was that this is unspecified. We choose to always zero-extend
17807 because that is the interpretation long in use by GCC. */
17810 dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack,
17811 struct dwarf2_cu *cu, LONGEST *value, int bits)
17813 struct objfile *objfile = cu->objfile;
17814 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
17815 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
17816 LONGEST l = DW_UNSND (attr);
17818 if (bits < sizeof (*value) * 8)
17820 l &= ((LONGEST) 1 << bits) - 1;
17823 else if (bits == sizeof (*value) * 8)
17827 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
17828 store_unsigned_integer (bytes, bits / 8, byte_order, l);
17835 /* Read a constant value from an attribute. Either set *VALUE, or if
17836 the value does not fit in *VALUE, set *BYTES - either already
17837 allocated on the objfile obstack, or newly allocated on OBSTACK,
17838 or, set *BATON, if we translated the constant to a location
17842 dwarf2_const_value_attr (const struct attribute *attr, struct type *type,
17843 const char *name, struct obstack *obstack,
17844 struct dwarf2_cu *cu,
17845 LONGEST *value, const gdb_byte **bytes,
17846 struct dwarf2_locexpr_baton **baton)
17848 struct objfile *objfile = cu->objfile;
17849 struct comp_unit_head *cu_header = &cu->header;
17850 struct dwarf_block *blk;
17851 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
17852 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
17858 switch (attr->form)
17861 case DW_FORM_GNU_addr_index:
17865 if (TYPE_LENGTH (type) != cu_header->addr_size)
17866 dwarf2_const_value_length_mismatch_complaint (name,
17867 cu_header->addr_size,
17868 TYPE_LENGTH (type));
17869 /* Symbols of this form are reasonably rare, so we just
17870 piggyback on the existing location code rather than writing
17871 a new implementation of symbol_computed_ops. */
17872 *baton = obstack_alloc (obstack, sizeof (struct dwarf2_locexpr_baton));
17873 (*baton)->per_cu = cu->per_cu;
17874 gdb_assert ((*baton)->per_cu);
17876 (*baton)->size = 2 + cu_header->addr_size;
17877 data = obstack_alloc (obstack, (*baton)->size);
17878 (*baton)->data = data;
17880 data[0] = DW_OP_addr;
17881 store_unsigned_integer (&data[1], cu_header->addr_size,
17882 byte_order, DW_ADDR (attr));
17883 data[cu_header->addr_size + 1] = DW_OP_stack_value;
17886 case DW_FORM_string:
17888 case DW_FORM_GNU_str_index:
17889 case DW_FORM_GNU_strp_alt:
17890 /* DW_STRING is already allocated on the objfile obstack, point
17892 *bytes = (const gdb_byte *) DW_STRING (attr);
17894 case DW_FORM_block1:
17895 case DW_FORM_block2:
17896 case DW_FORM_block4:
17897 case DW_FORM_block:
17898 case DW_FORM_exprloc:
17899 blk = DW_BLOCK (attr);
17900 if (TYPE_LENGTH (type) != blk->size)
17901 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
17902 TYPE_LENGTH (type));
17903 *bytes = blk->data;
17906 /* The DW_AT_const_value attributes are supposed to carry the
17907 symbol's value "represented as it would be on the target
17908 architecture." By the time we get here, it's already been
17909 converted to host endianness, so we just need to sign- or
17910 zero-extend it as appropriate. */
17911 case DW_FORM_data1:
17912 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8);
17914 case DW_FORM_data2:
17915 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16);
17917 case DW_FORM_data4:
17918 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32);
17920 case DW_FORM_data8:
17921 *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64);
17924 case DW_FORM_sdata:
17925 *value = DW_SND (attr);
17928 case DW_FORM_udata:
17929 *value = DW_UNSND (attr);
17933 complaint (&symfile_complaints,
17934 _("unsupported const value attribute form: '%s'"),
17935 dwarf_form_name (attr->form));
17942 /* Copy constant value from an attribute to a symbol. */
17945 dwarf2_const_value (const struct attribute *attr, struct symbol *sym,
17946 struct dwarf2_cu *cu)
17948 struct objfile *objfile = cu->objfile;
17949 struct comp_unit_head *cu_header = &cu->header;
17951 const gdb_byte *bytes;
17952 struct dwarf2_locexpr_baton *baton;
17954 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
17955 SYMBOL_PRINT_NAME (sym),
17956 &objfile->objfile_obstack, cu,
17957 &value, &bytes, &baton);
17961 SYMBOL_LOCATION_BATON (sym) = baton;
17962 SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index;
17964 else if (bytes != NULL)
17966 SYMBOL_VALUE_BYTES (sym) = bytes;
17967 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
17971 SYMBOL_VALUE (sym) = value;
17972 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
17976 /* Return the type of the die in question using its DW_AT_type attribute. */
17978 static struct type *
17979 die_type (struct die_info *die, struct dwarf2_cu *cu)
17981 struct attribute *type_attr;
17983 type_attr = dwarf2_attr (die, DW_AT_type, cu);
17986 /* A missing DW_AT_type represents a void type. */
17987 return objfile_type (cu->objfile)->builtin_void;
17990 return lookup_die_type (die, type_attr, cu);
17993 /* True iff CU's producer generates GNAT Ada auxiliary information
17994 that allows to find parallel types through that information instead
17995 of having to do expensive parallel lookups by type name. */
17998 need_gnat_info (struct dwarf2_cu *cu)
18000 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18001 of GNAT produces this auxiliary information, without any indication
18002 that it is produced. Part of enhancing the FSF version of GNAT
18003 to produce that information will be to put in place an indicator
18004 that we can use in order to determine whether the descriptive type
18005 info is available or not. One suggestion that has been made is
18006 to use a new attribute, attached to the CU die. For now, assume
18007 that the descriptive type info is not available. */
18011 /* Return the auxiliary type of the die in question using its
18012 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18013 attribute is not present. */
18015 static struct type *
18016 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
18018 struct attribute *type_attr;
18020 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
18024 return lookup_die_type (die, type_attr, cu);
18027 /* If DIE has a descriptive_type attribute, then set the TYPE's
18028 descriptive type accordingly. */
18031 set_descriptive_type (struct type *type, struct die_info *die,
18032 struct dwarf2_cu *cu)
18034 struct type *descriptive_type = die_descriptive_type (die, cu);
18036 if (descriptive_type)
18038 ALLOCATE_GNAT_AUX_TYPE (type);
18039 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
18043 /* Return the containing type of the die in question using its
18044 DW_AT_containing_type attribute. */
18046 static struct type *
18047 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
18049 struct attribute *type_attr;
18051 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
18053 error (_("Dwarf Error: Problem turning containing type into gdb type "
18054 "[in module %s]"), objfile_name (cu->objfile));
18056 return lookup_die_type (die, type_attr, cu);
18059 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18061 static struct type *
18062 build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die)
18064 struct objfile *objfile = dwarf2_per_objfile->objfile;
18065 char *message, *saved;
18067 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18068 objfile_name (objfile),
18069 cu->header.offset.sect_off,
18070 die->offset.sect_off);
18071 saved = obstack_copy0 (&objfile->objfile_obstack,
18072 message, strlen (message));
18075 return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile);
18078 /* Look up the type of DIE in CU using its type attribute ATTR.
18079 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18080 DW_AT_containing_type.
18081 If there is no type substitute an error marker. */
18083 static struct type *
18084 lookup_die_type (struct die_info *die, const struct attribute *attr,
18085 struct dwarf2_cu *cu)
18087 struct objfile *objfile = cu->objfile;
18088 struct type *this_type;
18090 gdb_assert (attr->name == DW_AT_type
18091 || attr->name == DW_AT_GNAT_descriptive_type
18092 || attr->name == DW_AT_containing_type);
18094 /* First see if we have it cached. */
18096 if (attr->form == DW_FORM_GNU_ref_alt)
18098 struct dwarf2_per_cu_data *per_cu;
18099 sect_offset offset = dwarf2_get_ref_die_offset (attr);
18101 per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile);
18102 this_type = get_die_type_at_offset (offset, per_cu);
18104 else if (attr_form_is_ref (attr))
18106 sect_offset offset = dwarf2_get_ref_die_offset (attr);
18108 this_type = get_die_type_at_offset (offset, cu->per_cu);
18110 else if (attr->form == DW_FORM_ref_sig8)
18112 ULONGEST signature = DW_SIGNATURE (attr);
18114 return get_signatured_type (die, signature, cu);
18118 complaint (&symfile_complaints,
18119 _("Dwarf Error: Bad type attribute %s in DIE"
18120 " at 0x%x [in module %s]"),
18121 dwarf_attr_name (attr->name), die->offset.sect_off,
18122 objfile_name (objfile));
18123 return build_error_marker_type (cu, die);
18126 /* If not cached we need to read it in. */
18128 if (this_type == NULL)
18130 struct die_info *type_die = NULL;
18131 struct dwarf2_cu *type_cu = cu;
18133 if (attr_form_is_ref (attr))
18134 type_die = follow_die_ref (die, attr, &type_cu);
18135 if (type_die == NULL)
18136 return build_error_marker_type (cu, die);
18137 /* If we find the type now, it's probably because the type came
18138 from an inter-CU reference and the type's CU got expanded before
18140 this_type = read_type_die (type_die, type_cu);
18143 /* If we still don't have a type use an error marker. */
18145 if (this_type == NULL)
18146 return build_error_marker_type (cu, die);
18151 /* Return the type in DIE, CU.
18152 Returns NULL for invalid types.
18154 This first does a lookup in die_type_hash,
18155 and only reads the die in if necessary.
18157 NOTE: This can be called when reading in partial or full symbols. */
18159 static struct type *
18160 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
18162 struct type *this_type;
18164 this_type = get_die_type (die, cu);
18168 return read_type_die_1 (die, cu);
18171 /* Read the type in DIE, CU.
18172 Returns NULL for invalid types. */
18174 static struct type *
18175 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
18177 struct type *this_type = NULL;
18181 case DW_TAG_class_type:
18182 case DW_TAG_interface_type:
18183 case DW_TAG_structure_type:
18184 case DW_TAG_union_type:
18185 this_type = read_structure_type (die, cu);
18187 case DW_TAG_enumeration_type:
18188 this_type = read_enumeration_type (die, cu);
18190 case DW_TAG_subprogram:
18191 case DW_TAG_subroutine_type:
18192 case DW_TAG_inlined_subroutine:
18193 this_type = read_subroutine_type (die, cu);
18195 case DW_TAG_array_type:
18196 this_type = read_array_type (die, cu);
18198 case DW_TAG_set_type:
18199 this_type = read_set_type (die, cu);
18201 case DW_TAG_pointer_type:
18202 this_type = read_tag_pointer_type (die, cu);
18204 case DW_TAG_ptr_to_member_type:
18205 this_type = read_tag_ptr_to_member_type (die, cu);
18207 case DW_TAG_reference_type:
18208 this_type = read_tag_reference_type (die, cu);
18210 case DW_TAG_const_type:
18211 this_type = read_tag_const_type (die, cu);
18213 case DW_TAG_volatile_type:
18214 this_type = read_tag_volatile_type (die, cu);
18216 case DW_TAG_restrict_type:
18217 this_type = read_tag_restrict_type (die, cu);
18219 case DW_TAG_string_type:
18220 this_type = read_tag_string_type (die, cu);
18222 case DW_TAG_typedef:
18223 this_type = read_typedef (die, cu);
18225 case DW_TAG_subrange_type:
18226 this_type = read_subrange_type (die, cu);
18228 case DW_TAG_base_type:
18229 this_type = read_base_type (die, cu);
18231 case DW_TAG_unspecified_type:
18232 this_type = read_unspecified_type (die, cu);
18234 case DW_TAG_namespace:
18235 this_type = read_namespace_type (die, cu);
18237 case DW_TAG_module:
18238 this_type = read_module_type (die, cu);
18241 complaint (&symfile_complaints,
18242 _("unexpected tag in read_type_die: '%s'"),
18243 dwarf_tag_name (die->tag));
18250 /* See if we can figure out if the class lives in a namespace. We do
18251 this by looking for a member function; its demangled name will
18252 contain namespace info, if there is any.
18253 Return the computed name or NULL.
18254 Space for the result is allocated on the objfile's obstack.
18255 This is the full-die version of guess_partial_die_structure_name.
18256 In this case we know DIE has no useful parent. */
18259 guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu)
18261 struct die_info *spec_die;
18262 struct dwarf2_cu *spec_cu;
18263 struct die_info *child;
18266 spec_die = die_specification (die, &spec_cu);
18267 if (spec_die != NULL)
18273 for (child = die->child;
18275 child = child->sibling)
18277 if (child->tag == DW_TAG_subprogram)
18279 struct attribute *attr;
18281 attr = dwarf2_attr (child, DW_AT_linkage_name, cu);
18283 attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu);
18287 = language_class_name_from_physname (cu->language_defn,
18291 if (actual_name != NULL)
18293 const char *die_name = dwarf2_name (die, cu);
18295 if (die_name != NULL
18296 && strcmp (die_name, actual_name) != 0)
18298 /* Strip off the class name from the full name.
18299 We want the prefix. */
18300 int die_name_len = strlen (die_name);
18301 int actual_name_len = strlen (actual_name);
18303 /* Test for '::' as a sanity check. */
18304 if (actual_name_len > die_name_len + 2
18305 && actual_name[actual_name_len
18306 - die_name_len - 1] == ':')
18308 obstack_copy0 (&cu->objfile->objfile_obstack,
18310 actual_name_len - die_name_len - 2);
18313 xfree (actual_name);
18322 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18323 prefix part in such case. See
18324 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18327 anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu)
18329 struct attribute *attr;
18332 if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type
18333 && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type)
18336 attr = dwarf2_attr (die, DW_AT_name, cu);
18337 if (attr != NULL && DW_STRING (attr) != NULL)
18340 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
18342 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
18343 if (attr == NULL || DW_STRING (attr) == NULL)
18346 /* dwarf2_name had to be already called. */
18347 gdb_assert (DW_STRING_IS_CANONICAL (attr));
18349 /* Strip the base name, keep any leading namespaces/classes. */
18350 base = strrchr (DW_STRING (attr), ':');
18351 if (base == NULL || base == DW_STRING (attr) || base[-1] != ':')
18354 return obstack_copy0 (&cu->objfile->objfile_obstack,
18355 DW_STRING (attr), &base[-1] - DW_STRING (attr));
18358 /* Return the name of the namespace/class that DIE is defined within,
18359 or "" if we can't tell. The caller should not xfree the result.
18361 For example, if we're within the method foo() in the following
18371 then determine_prefix on foo's die will return "N::C". */
18373 static const char *
18374 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
18376 struct die_info *parent, *spec_die;
18377 struct dwarf2_cu *spec_cu;
18378 struct type *parent_type;
18381 if (cu->language != language_cplus && cu->language != language_java
18382 && cu->language != language_fortran)
18385 retval = anonymous_struct_prefix (die, cu);
18389 /* We have to be careful in the presence of DW_AT_specification.
18390 For example, with GCC 3.4, given the code
18394 // Definition of N::foo.
18398 then we'll have a tree of DIEs like this:
18400 1: DW_TAG_compile_unit
18401 2: DW_TAG_namespace // N
18402 3: DW_TAG_subprogram // declaration of N::foo
18403 4: DW_TAG_subprogram // definition of N::foo
18404 DW_AT_specification // refers to die #3
18406 Thus, when processing die #4, we have to pretend that we're in
18407 the context of its DW_AT_specification, namely the contex of die
18410 spec_die = die_specification (die, &spec_cu);
18411 if (spec_die == NULL)
18412 parent = die->parent;
18415 parent = spec_die->parent;
18419 if (parent == NULL)
18421 else if (parent->building_fullname)
18424 const char *parent_name;
18426 /* It has been seen on RealView 2.2 built binaries,
18427 DW_TAG_template_type_param types actually _defined_ as
18428 children of the parent class:
18431 template class <class Enum> Class{};
18432 Class<enum E> class_e;
18434 1: DW_TAG_class_type (Class)
18435 2: DW_TAG_enumeration_type (E)
18436 3: DW_TAG_enumerator (enum1:0)
18437 3: DW_TAG_enumerator (enum2:1)
18439 2: DW_TAG_template_type_param
18440 DW_AT_type DW_FORM_ref_udata (E)
18442 Besides being broken debug info, it can put GDB into an
18443 infinite loop. Consider:
18445 When we're building the full name for Class<E>, we'll start
18446 at Class, and go look over its template type parameters,
18447 finding E. We'll then try to build the full name of E, and
18448 reach here. We're now trying to build the full name of E,
18449 and look over the parent DIE for containing scope. In the
18450 broken case, if we followed the parent DIE of E, we'd again
18451 find Class, and once again go look at its template type
18452 arguments, etc., etc. Simply don't consider such parent die
18453 as source-level parent of this die (it can't be, the language
18454 doesn't allow it), and break the loop here. */
18455 name = dwarf2_name (die, cu);
18456 parent_name = dwarf2_name (parent, cu);
18457 complaint (&symfile_complaints,
18458 _("template param type '%s' defined within parent '%s'"),
18459 name ? name : "<unknown>",
18460 parent_name ? parent_name : "<unknown>");
18464 switch (parent->tag)
18466 case DW_TAG_namespace:
18467 parent_type = read_type_die (parent, cu);
18468 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
18469 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
18470 Work around this problem here. */
18471 if (cu->language == language_cplus
18472 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
18474 /* We give a name to even anonymous namespaces. */
18475 return TYPE_TAG_NAME (parent_type);
18476 case DW_TAG_class_type:
18477 case DW_TAG_interface_type:
18478 case DW_TAG_structure_type:
18479 case DW_TAG_union_type:
18480 case DW_TAG_module:
18481 parent_type = read_type_die (parent, cu);
18482 if (TYPE_TAG_NAME (parent_type) != NULL)
18483 return TYPE_TAG_NAME (parent_type);
18485 /* An anonymous structure is only allowed non-static data
18486 members; no typedefs, no member functions, et cetera.
18487 So it does not need a prefix. */
18489 case DW_TAG_compile_unit:
18490 case DW_TAG_partial_unit:
18491 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
18492 if (cu->language == language_cplus
18493 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
18494 && die->child != NULL
18495 && (die->tag == DW_TAG_class_type
18496 || die->tag == DW_TAG_structure_type
18497 || die->tag == DW_TAG_union_type))
18499 char *name = guess_full_die_structure_name (die, cu);
18505 return determine_prefix (parent, cu);
18509 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
18510 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
18511 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
18512 an obconcat, otherwise allocate storage for the result. The CU argument is
18513 used to determine the language and hence, the appropriate separator. */
18515 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
18518 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
18519 int physname, struct dwarf2_cu *cu)
18521 const char *lead = "";
18524 if (suffix == NULL || suffix[0] == '\0'
18525 || prefix == NULL || prefix[0] == '\0')
18527 else if (cu->language == language_java)
18529 else if (cu->language == language_fortran && physname)
18531 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
18532 DW_AT_MIPS_linkage_name is preferred and used instead. */
18540 if (prefix == NULL)
18542 if (suffix == NULL)
18548 = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
18550 strcpy (retval, lead);
18551 strcat (retval, prefix);
18552 strcat (retval, sep);
18553 strcat (retval, suffix);
18558 /* We have an obstack. */
18559 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
18563 /* Return sibling of die, NULL if no sibling. */
18565 static struct die_info *
18566 sibling_die (struct die_info *die)
18568 return die->sibling;
18571 /* Get name of a die, return NULL if not found. */
18573 static const char *
18574 dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu,
18575 struct obstack *obstack)
18577 if (name && cu->language == language_cplus)
18579 char *canon_name = cp_canonicalize_string (name);
18581 if (canon_name != NULL)
18583 if (strcmp (canon_name, name) != 0)
18584 name = obstack_copy0 (obstack, canon_name, strlen (canon_name));
18585 xfree (canon_name);
18592 /* Get name of a die, return NULL if not found. */
18594 static const char *
18595 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
18597 struct attribute *attr;
18599 attr = dwarf2_attr (die, DW_AT_name, cu);
18600 if ((!attr || !DW_STRING (attr))
18601 && die->tag != DW_TAG_class_type
18602 && die->tag != DW_TAG_interface_type
18603 && die->tag != DW_TAG_structure_type
18604 && die->tag != DW_TAG_union_type)
18609 case DW_TAG_compile_unit:
18610 case DW_TAG_partial_unit:
18611 /* Compilation units have a DW_AT_name that is a filename, not
18612 a source language identifier. */
18613 case DW_TAG_enumeration_type:
18614 case DW_TAG_enumerator:
18615 /* These tags always have simple identifiers already; no need
18616 to canonicalize them. */
18617 return DW_STRING (attr);
18619 case DW_TAG_subprogram:
18620 /* Java constructors will all be named "<init>", so return
18621 the class name when we see this special case. */
18622 if (cu->language == language_java
18623 && DW_STRING (attr) != NULL
18624 && strcmp (DW_STRING (attr), "<init>") == 0)
18626 struct dwarf2_cu *spec_cu = cu;
18627 struct die_info *spec_die;
18629 /* GCJ will output '<init>' for Java constructor names.
18630 For this special case, return the name of the parent class. */
18632 /* GCJ may output suprogram DIEs with AT_specification set.
18633 If so, use the name of the specified DIE. */
18634 spec_die = die_specification (die, &spec_cu);
18635 if (spec_die != NULL)
18636 return dwarf2_name (spec_die, spec_cu);
18641 if (die->tag == DW_TAG_class_type)
18642 return dwarf2_name (die, cu);
18644 while (die->tag != DW_TAG_compile_unit
18645 && die->tag != DW_TAG_partial_unit);
18649 case DW_TAG_class_type:
18650 case DW_TAG_interface_type:
18651 case DW_TAG_structure_type:
18652 case DW_TAG_union_type:
18653 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
18654 structures or unions. These were of the form "._%d" in GCC 4.1,
18655 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
18656 and GCC 4.4. We work around this problem by ignoring these. */
18657 if (attr && DW_STRING (attr)
18658 && (strncmp (DW_STRING (attr), "._", 2) == 0
18659 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0))
18662 /* GCC might emit a nameless typedef that has a linkage name. See
18663 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18664 if (!attr || DW_STRING (attr) == NULL)
18666 char *demangled = NULL;
18668 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
18670 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
18672 if (attr == NULL || DW_STRING (attr) == NULL)
18675 /* Avoid demangling DW_STRING (attr) the second time on a second
18676 call for the same DIE. */
18677 if (!DW_STRING_IS_CANONICAL (attr))
18678 demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES);
18684 /* FIXME: we already did this for the partial symbol... */
18685 DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack,
18686 demangled, strlen (demangled));
18687 DW_STRING_IS_CANONICAL (attr) = 1;
18690 /* Strip any leading namespaces/classes, keep only the base name.
18691 DW_AT_name for named DIEs does not contain the prefixes. */
18692 base = strrchr (DW_STRING (attr), ':');
18693 if (base && base > DW_STRING (attr) && base[-1] == ':')
18696 return DW_STRING (attr);
18705 if (!DW_STRING_IS_CANONICAL (attr))
18708 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
18709 &cu->objfile->objfile_obstack);
18710 DW_STRING_IS_CANONICAL (attr) = 1;
18712 return DW_STRING (attr);
18715 /* Return the die that this die in an extension of, or NULL if there
18716 is none. *EXT_CU is the CU containing DIE on input, and the CU
18717 containing the return value on output. */
18719 static struct die_info *
18720 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
18722 struct attribute *attr;
18724 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
18728 return follow_die_ref (die, attr, ext_cu);
18731 /* Convert a DIE tag into its string name. */
18733 static const char *
18734 dwarf_tag_name (unsigned tag)
18736 const char *name = get_DW_TAG_name (tag);
18739 return "DW_TAG_<unknown>";
18744 /* Convert a DWARF attribute code into its string name. */
18746 static const char *
18747 dwarf_attr_name (unsigned attr)
18751 #ifdef MIPS /* collides with DW_AT_HP_block_index */
18752 if (attr == DW_AT_MIPS_fde)
18753 return "DW_AT_MIPS_fde";
18755 if (attr == DW_AT_HP_block_index)
18756 return "DW_AT_HP_block_index";
18759 name = get_DW_AT_name (attr);
18762 return "DW_AT_<unknown>";
18767 /* Convert a DWARF value form code into its string name. */
18769 static const char *
18770 dwarf_form_name (unsigned form)
18772 const char *name = get_DW_FORM_name (form);
18775 return "DW_FORM_<unknown>";
18781 dwarf_bool_name (unsigned mybool)
18789 /* Convert a DWARF type code into its string name. */
18791 static const char *
18792 dwarf_type_encoding_name (unsigned enc)
18794 const char *name = get_DW_ATE_name (enc);
18797 return "DW_ATE_<unknown>";
18803 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
18807 print_spaces (indent, f);
18808 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
18809 dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off);
18811 if (die->parent != NULL)
18813 print_spaces (indent, f);
18814 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
18815 die->parent->offset.sect_off);
18818 print_spaces (indent, f);
18819 fprintf_unfiltered (f, " has children: %s\n",
18820 dwarf_bool_name (die->child != NULL));
18822 print_spaces (indent, f);
18823 fprintf_unfiltered (f, " attributes:\n");
18825 for (i = 0; i < die->num_attrs; ++i)
18827 print_spaces (indent, f);
18828 fprintf_unfiltered (f, " %s (%s) ",
18829 dwarf_attr_name (die->attrs[i].name),
18830 dwarf_form_name (die->attrs[i].form));
18832 switch (die->attrs[i].form)
18835 case DW_FORM_GNU_addr_index:
18836 fprintf_unfiltered (f, "address: ");
18837 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
18839 case DW_FORM_block2:
18840 case DW_FORM_block4:
18841 case DW_FORM_block:
18842 case DW_FORM_block1:
18843 fprintf_unfiltered (f, "block: size %s",
18844 pulongest (DW_BLOCK (&die->attrs[i])->size));
18846 case DW_FORM_exprloc:
18847 fprintf_unfiltered (f, "expression: size %s",
18848 pulongest (DW_BLOCK (&die->attrs[i])->size));
18850 case DW_FORM_ref_addr:
18851 fprintf_unfiltered (f, "ref address: ");
18852 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
18854 case DW_FORM_GNU_ref_alt:
18855 fprintf_unfiltered (f, "alt ref address: ");
18856 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
18862 case DW_FORM_ref_udata:
18863 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
18864 (long) (DW_UNSND (&die->attrs[i])));
18866 case DW_FORM_data1:
18867 case DW_FORM_data2:
18868 case DW_FORM_data4:
18869 case DW_FORM_data8:
18870 case DW_FORM_udata:
18871 case DW_FORM_sdata:
18872 fprintf_unfiltered (f, "constant: %s",
18873 pulongest (DW_UNSND (&die->attrs[i])));
18875 case DW_FORM_sec_offset:
18876 fprintf_unfiltered (f, "section offset: %s",
18877 pulongest (DW_UNSND (&die->attrs[i])));
18879 case DW_FORM_ref_sig8:
18880 fprintf_unfiltered (f, "signature: %s",
18881 hex_string (DW_SIGNATURE (&die->attrs[i])));
18883 case DW_FORM_string:
18885 case DW_FORM_GNU_str_index:
18886 case DW_FORM_GNU_strp_alt:
18887 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
18888 DW_STRING (&die->attrs[i])
18889 ? DW_STRING (&die->attrs[i]) : "",
18890 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
18893 if (DW_UNSND (&die->attrs[i]))
18894 fprintf_unfiltered (f, "flag: TRUE");
18896 fprintf_unfiltered (f, "flag: FALSE");
18898 case DW_FORM_flag_present:
18899 fprintf_unfiltered (f, "flag: TRUE");
18901 case DW_FORM_indirect:
18902 /* The reader will have reduced the indirect form to
18903 the "base form" so this form should not occur. */
18904 fprintf_unfiltered (f,
18905 "unexpected attribute form: DW_FORM_indirect");
18908 fprintf_unfiltered (f, "unsupported attribute form: %d.",
18909 die->attrs[i].form);
18912 fprintf_unfiltered (f, "\n");
18917 dump_die_for_error (struct die_info *die)
18919 dump_die_shallow (gdb_stderr, 0, die);
18923 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
18925 int indent = level * 4;
18927 gdb_assert (die != NULL);
18929 if (level >= max_level)
18932 dump_die_shallow (f, indent, die);
18934 if (die->child != NULL)
18936 print_spaces (indent, f);
18937 fprintf_unfiltered (f, " Children:");
18938 if (level + 1 < max_level)
18940 fprintf_unfiltered (f, "\n");
18941 dump_die_1 (f, level + 1, max_level, die->child);
18945 fprintf_unfiltered (f,
18946 " [not printed, max nesting level reached]\n");
18950 if (die->sibling != NULL && level > 0)
18952 dump_die_1 (f, level, max_level, die->sibling);
18956 /* This is called from the pdie macro in gdbinit.in.
18957 It's not static so gcc will keep a copy callable from gdb. */
18960 dump_die (struct die_info *die, int max_level)
18962 dump_die_1 (gdb_stdlog, 0, max_level, die);
18966 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
18970 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off,
18976 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
18980 dwarf2_get_ref_die_offset (const struct attribute *attr)
18982 sect_offset retval = { DW_UNSND (attr) };
18984 if (attr_form_is_ref (attr))
18987 retval.sect_off = 0;
18988 complaint (&symfile_complaints,
18989 _("unsupported die ref attribute form: '%s'"),
18990 dwarf_form_name (attr->form));
18994 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
18995 * the value held by the attribute is not constant. */
18998 dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value)
19000 if (attr->form == DW_FORM_sdata)
19001 return DW_SND (attr);
19002 else if (attr->form == DW_FORM_udata
19003 || attr->form == DW_FORM_data1
19004 || attr->form == DW_FORM_data2
19005 || attr->form == DW_FORM_data4
19006 || attr->form == DW_FORM_data8)
19007 return DW_UNSND (attr);
19010 complaint (&symfile_complaints,
19011 _("Attribute value is not a constant (%s)"),
19012 dwarf_form_name (attr->form));
19013 return default_value;
19017 /* Follow reference or signature attribute ATTR of SRC_DIE.
19018 On entry *REF_CU is the CU of SRC_DIE.
19019 On exit *REF_CU is the CU of the result. */
19021 static struct die_info *
19022 follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr,
19023 struct dwarf2_cu **ref_cu)
19025 struct die_info *die;
19027 if (attr_form_is_ref (attr))
19028 die = follow_die_ref (src_die, attr, ref_cu);
19029 else if (attr->form == DW_FORM_ref_sig8)
19030 die = follow_die_sig (src_die, attr, ref_cu);
19033 dump_die_for_error (src_die);
19034 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19035 objfile_name ((*ref_cu)->objfile));
19041 /* Follow reference OFFSET.
19042 On entry *REF_CU is the CU of the source die referencing OFFSET.
19043 On exit *REF_CU is the CU of the result.
19044 Returns NULL if OFFSET is invalid. */
19046 static struct die_info *
19047 follow_die_offset (sect_offset offset, int offset_in_dwz,
19048 struct dwarf2_cu **ref_cu)
19050 struct die_info temp_die;
19051 struct dwarf2_cu *target_cu, *cu = *ref_cu;
19053 gdb_assert (cu->per_cu != NULL);
19057 if (cu->per_cu->is_debug_types)
19059 /* .debug_types CUs cannot reference anything outside their CU.
19060 If they need to, they have to reference a signatured type via
19061 DW_FORM_ref_sig8. */
19062 if (! offset_in_cu_p (&cu->header, offset))
19065 else if (offset_in_dwz != cu->per_cu->is_dwz
19066 || ! offset_in_cu_p (&cu->header, offset))
19068 struct dwarf2_per_cu_data *per_cu;
19070 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
19073 /* If necessary, add it to the queue and load its DIEs. */
19074 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
19075 load_full_comp_unit (per_cu, cu->language);
19077 target_cu = per_cu->cu;
19079 else if (cu->dies == NULL)
19081 /* We're loading full DIEs during partial symbol reading. */
19082 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
19083 load_full_comp_unit (cu->per_cu, language_minimal);
19086 *ref_cu = target_cu;
19087 temp_die.offset = offset;
19088 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off);
19091 /* Follow reference attribute ATTR of SRC_DIE.
19092 On entry *REF_CU is the CU of SRC_DIE.
19093 On exit *REF_CU is the CU of the result. */
19095 static struct die_info *
19096 follow_die_ref (struct die_info *src_die, const struct attribute *attr,
19097 struct dwarf2_cu **ref_cu)
19099 sect_offset offset = dwarf2_get_ref_die_offset (attr);
19100 struct dwarf2_cu *cu = *ref_cu;
19101 struct die_info *die;
19103 die = follow_die_offset (offset,
19104 (attr->form == DW_FORM_GNU_ref_alt
19105 || cu->per_cu->is_dwz),
19108 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19109 "at 0x%x [in module %s]"),
19110 offset.sect_off, src_die->offset.sect_off,
19111 objfile_name (cu->objfile));
19116 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19117 Returned value is intended for DW_OP_call*. Returned
19118 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19120 struct dwarf2_locexpr_baton
19121 dwarf2_fetch_die_loc_sect_off (sect_offset offset,
19122 struct dwarf2_per_cu_data *per_cu,
19123 CORE_ADDR (*get_frame_pc) (void *baton),
19126 struct dwarf2_cu *cu;
19127 struct die_info *die;
19128 struct attribute *attr;
19129 struct dwarf2_locexpr_baton retval;
19131 dw2_setup (per_cu->objfile);
19133 if (per_cu->cu == NULL)
19137 die = follow_die_offset (offset, per_cu->is_dwz, &cu);
19139 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19140 offset.sect_off, objfile_name (per_cu->objfile));
19142 attr = dwarf2_attr (die, DW_AT_location, cu);
19145 /* DWARF: "If there is no such attribute, then there is no effect.".
19146 DATA is ignored if SIZE is 0. */
19148 retval.data = NULL;
19151 else if (attr_form_is_section_offset (attr))
19153 struct dwarf2_loclist_baton loclist_baton;
19154 CORE_ADDR pc = (*get_frame_pc) (baton);
19157 fill_in_loclist_baton (cu, &loclist_baton, attr);
19159 retval.data = dwarf2_find_location_expression (&loclist_baton,
19161 retval.size = size;
19165 if (!attr_form_is_block (attr))
19166 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19167 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19168 offset.sect_off, objfile_name (per_cu->objfile));
19170 retval.data = DW_BLOCK (attr)->data;
19171 retval.size = DW_BLOCK (attr)->size;
19173 retval.per_cu = cu->per_cu;
19175 age_cached_comp_units ();
19180 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19183 struct dwarf2_locexpr_baton
19184 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu,
19185 struct dwarf2_per_cu_data *per_cu,
19186 CORE_ADDR (*get_frame_pc) (void *baton),
19189 sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off };
19191 return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton);
19194 /* Write a constant of a given type as target-ordered bytes into
19197 static const gdb_byte *
19198 write_constant_as_bytes (struct obstack *obstack,
19199 enum bfd_endian byte_order,
19206 *len = TYPE_LENGTH (type);
19207 result = obstack_alloc (obstack, *len);
19208 store_unsigned_integer (result, *len, byte_order, value);
19213 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19214 pointer to the constant bytes and set LEN to the length of the
19215 data. If memory is needed, allocate it on OBSTACK. If the DIE
19216 does not have a DW_AT_const_value, return NULL. */
19219 dwarf2_fetch_constant_bytes (sect_offset offset,
19220 struct dwarf2_per_cu_data *per_cu,
19221 struct obstack *obstack,
19224 struct dwarf2_cu *cu;
19225 struct die_info *die;
19226 struct attribute *attr;
19227 const gdb_byte *result = NULL;
19230 enum bfd_endian byte_order;
19232 dw2_setup (per_cu->objfile);
19234 if (per_cu->cu == NULL)
19238 die = follow_die_offset (offset, per_cu->is_dwz, &cu);
19240 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19241 offset.sect_off, objfile_name (per_cu->objfile));
19244 attr = dwarf2_attr (die, DW_AT_const_value, cu);
19248 byte_order = (bfd_big_endian (per_cu->objfile->obfd)
19249 ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
19251 switch (attr->form)
19254 case DW_FORM_GNU_addr_index:
19258 *len = cu->header.addr_size;
19259 tem = obstack_alloc (obstack, *len);
19260 store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr));
19264 case DW_FORM_string:
19266 case DW_FORM_GNU_str_index:
19267 case DW_FORM_GNU_strp_alt:
19268 /* DW_STRING is already allocated on the objfile obstack, point
19270 result = (const gdb_byte *) DW_STRING (attr);
19271 *len = strlen (DW_STRING (attr));
19273 case DW_FORM_block1:
19274 case DW_FORM_block2:
19275 case DW_FORM_block4:
19276 case DW_FORM_block:
19277 case DW_FORM_exprloc:
19278 result = DW_BLOCK (attr)->data;
19279 *len = DW_BLOCK (attr)->size;
19282 /* The DW_AT_const_value attributes are supposed to carry the
19283 symbol's value "represented as it would be on the target
19284 architecture." By the time we get here, it's already been
19285 converted to host endianness, so we just need to sign- or
19286 zero-extend it as appropriate. */
19287 case DW_FORM_data1:
19288 type = die_type (die, cu);
19289 result = dwarf2_const_value_data (attr, obstack, cu, &value, 8);
19290 if (result == NULL)
19291 result = write_constant_as_bytes (obstack, byte_order,
19294 case DW_FORM_data2:
19295 type = die_type (die, cu);
19296 result = dwarf2_const_value_data (attr, obstack, cu, &value, 16);
19297 if (result == NULL)
19298 result = write_constant_as_bytes (obstack, byte_order,
19301 case DW_FORM_data4:
19302 type = die_type (die, cu);
19303 result = dwarf2_const_value_data (attr, obstack, cu, &value, 32);
19304 if (result == NULL)
19305 result = write_constant_as_bytes (obstack, byte_order,
19308 case DW_FORM_data8:
19309 type = die_type (die, cu);
19310 result = dwarf2_const_value_data (attr, obstack, cu, &value, 64);
19311 if (result == NULL)
19312 result = write_constant_as_bytes (obstack, byte_order,
19316 case DW_FORM_sdata:
19317 type = die_type (die, cu);
19318 result = write_constant_as_bytes (obstack, byte_order,
19319 type, DW_SND (attr), len);
19322 case DW_FORM_udata:
19323 type = die_type (die, cu);
19324 result = write_constant_as_bytes (obstack, byte_order,
19325 type, DW_UNSND (attr), len);
19329 complaint (&symfile_complaints,
19330 _("unsupported const value attribute form: '%s'"),
19331 dwarf_form_name (attr->form));
19338 /* Return the type of the DIE at DIE_OFFSET in the CU named by
19342 dwarf2_get_die_type (cu_offset die_offset,
19343 struct dwarf2_per_cu_data *per_cu)
19345 sect_offset die_offset_sect;
19347 dw2_setup (per_cu->objfile);
19349 die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off;
19350 return get_die_type_at_offset (die_offset_sect, per_cu);
19353 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
19354 On entry *REF_CU is the CU of SRC_DIE.
19355 On exit *REF_CU is the CU of the result.
19356 Returns NULL if the referenced DIE isn't found. */
19358 static struct die_info *
19359 follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type,
19360 struct dwarf2_cu **ref_cu)
19362 struct objfile *objfile = (*ref_cu)->objfile;
19363 struct die_info temp_die;
19364 struct dwarf2_cu *sig_cu;
19365 struct die_info *die;
19367 /* While it might be nice to assert sig_type->type == NULL here,
19368 we can get here for DW_AT_imported_declaration where we need
19369 the DIE not the type. */
19371 /* If necessary, add it to the queue and load its DIEs. */
19373 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal))
19374 read_signatured_type (sig_type);
19376 sig_cu = sig_type->per_cu.cu;
19377 gdb_assert (sig_cu != NULL);
19378 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
19379 temp_die.offset = sig_type->type_offset_in_section;
19380 die = htab_find_with_hash (sig_cu->die_hash, &temp_die,
19381 temp_die.offset.sect_off);
19384 /* For .gdb_index version 7 keep track of included TUs.
19385 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
19386 if (dwarf2_per_objfile->index_table != NULL
19387 && dwarf2_per_objfile->index_table->version <= 7)
19389 VEC_safe_push (dwarf2_per_cu_ptr,
19390 (*ref_cu)->per_cu->imported_symtabs,
19401 /* Follow signatured type referenced by ATTR in SRC_DIE.
19402 On entry *REF_CU is the CU of SRC_DIE.
19403 On exit *REF_CU is the CU of the result.
19404 The result is the DIE of the type.
19405 If the referenced type cannot be found an error is thrown. */
19407 static struct die_info *
19408 follow_die_sig (struct die_info *src_die, const struct attribute *attr,
19409 struct dwarf2_cu **ref_cu)
19411 ULONGEST signature = DW_SIGNATURE (attr);
19412 struct signatured_type *sig_type;
19413 struct die_info *die;
19415 gdb_assert (attr->form == DW_FORM_ref_sig8);
19417 sig_type = lookup_signatured_type (*ref_cu, signature);
19418 /* sig_type will be NULL if the signatured type is missing from
19420 if (sig_type == NULL)
19422 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
19423 " from DIE at 0x%x [in module %s]"),
19424 hex_string (signature), src_die->offset.sect_off,
19425 objfile_name ((*ref_cu)->objfile));
19428 die = follow_die_sig_1 (src_die, sig_type, ref_cu);
19431 dump_die_for_error (src_die);
19432 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
19433 " from DIE at 0x%x [in module %s]"),
19434 hex_string (signature), src_die->offset.sect_off,
19435 objfile_name ((*ref_cu)->objfile));
19441 /* Get the type specified by SIGNATURE referenced in DIE/CU,
19442 reading in and processing the type unit if necessary. */
19444 static struct type *
19445 get_signatured_type (struct die_info *die, ULONGEST signature,
19446 struct dwarf2_cu *cu)
19448 struct signatured_type *sig_type;
19449 struct dwarf2_cu *type_cu;
19450 struct die_info *type_die;
19453 sig_type = lookup_signatured_type (cu, signature);
19454 /* sig_type will be NULL if the signatured type is missing from
19456 if (sig_type == NULL)
19458 complaint (&symfile_complaints,
19459 _("Dwarf Error: Cannot find signatured DIE %s referenced"
19460 " from DIE at 0x%x [in module %s]"),
19461 hex_string (signature), die->offset.sect_off,
19462 objfile_name (dwarf2_per_objfile->objfile));
19463 return build_error_marker_type (cu, die);
19466 /* If we already know the type we're done. */
19467 if (sig_type->type != NULL)
19468 return sig_type->type;
19471 type_die = follow_die_sig_1 (die, sig_type, &type_cu);
19472 if (type_die != NULL)
19474 /* N.B. We need to call get_die_type to ensure only one type for this DIE
19475 is created. This is important, for example, because for c++ classes
19476 we need TYPE_NAME set which is only done by new_symbol. Blech. */
19477 type = read_type_die (type_die, type_cu);
19480 complaint (&symfile_complaints,
19481 _("Dwarf Error: Cannot build signatured type %s"
19482 " referenced from DIE at 0x%x [in module %s]"),
19483 hex_string (signature), die->offset.sect_off,
19484 objfile_name (dwarf2_per_objfile->objfile));
19485 type = build_error_marker_type (cu, die);
19490 complaint (&symfile_complaints,
19491 _("Dwarf Error: Problem reading signatured DIE %s referenced"
19492 " from DIE at 0x%x [in module %s]"),
19493 hex_string (signature), die->offset.sect_off,
19494 objfile_name (dwarf2_per_objfile->objfile));
19495 type = build_error_marker_type (cu, die);
19497 sig_type->type = type;
19502 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
19503 reading in and processing the type unit if necessary. */
19505 static struct type *
19506 get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr,
19507 struct dwarf2_cu *cu) /* ARI: editCase function */
19509 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
19510 if (attr_form_is_ref (attr))
19512 struct dwarf2_cu *type_cu = cu;
19513 struct die_info *type_die = follow_die_ref (die, attr, &type_cu);
19515 return read_type_die (type_die, type_cu);
19517 else if (attr->form == DW_FORM_ref_sig8)
19519 return get_signatured_type (die, DW_SIGNATURE (attr), cu);
19523 complaint (&symfile_complaints,
19524 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
19525 " at 0x%x [in module %s]"),
19526 dwarf_form_name (attr->form), die->offset.sect_off,
19527 objfile_name (dwarf2_per_objfile->objfile));
19528 return build_error_marker_type (cu, die);
19532 /* Load the DIEs associated with type unit PER_CU into memory. */
19535 load_full_type_unit (struct dwarf2_per_cu_data *per_cu)
19537 struct signatured_type *sig_type;
19539 /* Caller is responsible for ensuring type_unit_groups don't get here. */
19540 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
19542 /* We have the per_cu, but we need the signatured_type.
19543 Fortunately this is an easy translation. */
19544 gdb_assert (per_cu->is_debug_types);
19545 sig_type = (struct signatured_type *) per_cu;
19547 gdb_assert (per_cu->cu == NULL);
19549 read_signatured_type (sig_type);
19551 gdb_assert (per_cu->cu != NULL);
19554 /* die_reader_func for read_signatured_type.
19555 This is identical to load_full_comp_unit_reader,
19556 but is kept separate for now. */
19559 read_signatured_type_reader (const struct die_reader_specs *reader,
19560 const gdb_byte *info_ptr,
19561 struct die_info *comp_unit_die,
19565 struct dwarf2_cu *cu = reader->cu;
19567 gdb_assert (cu->die_hash == NULL);
19569 htab_create_alloc_ex (cu->header.length / 12,
19573 &cu->comp_unit_obstack,
19574 hashtab_obstack_allocate,
19575 dummy_obstack_deallocate);
19578 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
19579 &info_ptr, comp_unit_die);
19580 cu->dies = comp_unit_die;
19581 /* comp_unit_die is not stored in die_hash, no need. */
19583 /* We try not to read any attributes in this function, because not
19584 all CUs needed for references have been loaded yet, and symbol
19585 table processing isn't initialized. But we have to set the CU language,
19586 or we won't be able to build types correctly.
19587 Similarly, if we do not read the producer, we can not apply
19588 producer-specific interpretation. */
19589 prepare_one_comp_unit (cu, cu->dies, language_minimal);
19592 /* Read in a signatured type and build its CU and DIEs.
19593 If the type is a stub for the real type in a DWO file,
19594 read in the real type from the DWO file as well. */
19597 read_signatured_type (struct signatured_type *sig_type)
19599 struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu;
19601 gdb_assert (per_cu->is_debug_types);
19602 gdb_assert (per_cu->cu == NULL);
19604 init_cutu_and_read_dies (per_cu, NULL, 0, 1,
19605 read_signatured_type_reader, NULL);
19606 sig_type->per_cu.tu_read = 1;
19609 /* Decode simple location descriptions.
19610 Given a pointer to a dwarf block that defines a location, compute
19611 the location and return the value.
19613 NOTE drow/2003-11-18: This function is called in two situations
19614 now: for the address of static or global variables (partial symbols
19615 only) and for offsets into structures which are expected to be
19616 (more or less) constant. The partial symbol case should go away,
19617 and only the constant case should remain. That will let this
19618 function complain more accurately. A few special modes are allowed
19619 without complaint for global variables (for instance, global
19620 register values and thread-local values).
19622 A location description containing no operations indicates that the
19623 object is optimized out. The return value is 0 for that case.
19624 FIXME drow/2003-11-16: No callers check for this case any more; soon all
19625 callers will only want a very basic result and this can become a
19628 Note that stack[0] is unused except as a default error return. */
19631 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
19633 struct objfile *objfile = cu->objfile;
19635 size_t size = blk->size;
19636 const gdb_byte *data = blk->data;
19637 CORE_ADDR stack[64];
19639 unsigned int bytes_read, unsnd;
19645 stack[++stacki] = 0;
19684 stack[++stacki] = op - DW_OP_lit0;
19719 stack[++stacki] = op - DW_OP_reg0;
19721 dwarf2_complex_location_expr_complaint ();
19725 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
19727 stack[++stacki] = unsnd;
19729 dwarf2_complex_location_expr_complaint ();
19733 stack[++stacki] = read_address (objfile->obfd, &data[i],
19738 case DW_OP_const1u:
19739 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
19743 case DW_OP_const1s:
19744 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
19748 case DW_OP_const2u:
19749 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
19753 case DW_OP_const2s:
19754 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
19758 case DW_OP_const4u:
19759 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
19763 case DW_OP_const4s:
19764 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
19768 case DW_OP_const8u:
19769 stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]);
19774 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
19780 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
19785 stack[stacki + 1] = stack[stacki];
19790 stack[stacki - 1] += stack[stacki];
19794 case DW_OP_plus_uconst:
19795 stack[stacki] += read_unsigned_leb128 (NULL, (data + i),
19801 stack[stacki - 1] -= stack[stacki];
19806 /* If we're not the last op, then we definitely can't encode
19807 this using GDB's address_class enum. This is valid for partial
19808 global symbols, although the variable's address will be bogus
19811 dwarf2_complex_location_expr_complaint ();
19814 case DW_OP_GNU_push_tls_address:
19815 /* The top of the stack has the offset from the beginning
19816 of the thread control block at which the variable is located. */
19817 /* Nothing should follow this operator, so the top of stack would
19819 /* This is valid for partial global symbols, but the variable's
19820 address will be bogus in the psymtab. Make it always at least
19821 non-zero to not look as a variable garbage collected by linker
19822 which have DW_OP_addr 0. */
19824 dwarf2_complex_location_expr_complaint ();
19828 case DW_OP_GNU_uninit:
19831 case DW_OP_GNU_addr_index:
19832 case DW_OP_GNU_const_index:
19833 stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i],
19840 const char *name = get_DW_OP_name (op);
19843 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
19846 complaint (&symfile_complaints, _("unsupported stack op: '%02x'"),
19850 return (stack[stacki]);
19853 /* Enforce maximum stack depth of SIZE-1 to avoid writing
19854 outside of the allocated space. Also enforce minimum>0. */
19855 if (stacki >= ARRAY_SIZE (stack) - 1)
19857 complaint (&symfile_complaints,
19858 _("location description stack overflow"));
19864 complaint (&symfile_complaints,
19865 _("location description stack underflow"));
19869 return (stack[stacki]);
19872 /* memory allocation interface */
19874 static struct dwarf_block *
19875 dwarf_alloc_block (struct dwarf2_cu *cu)
19877 struct dwarf_block *blk;
19879 blk = (struct dwarf_block *)
19880 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
19884 static struct die_info *
19885 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
19887 struct die_info *die;
19888 size_t size = sizeof (struct die_info);
19891 size += (num_attrs - 1) * sizeof (struct attribute);
19893 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
19894 memset (die, 0, sizeof (struct die_info));
19899 /* Macro support. */
19901 /* Return file name relative to the compilation directory of file number I in
19902 *LH's file name table. The result is allocated using xmalloc; the caller is
19903 responsible for freeing it. */
19906 file_file_name (int file, struct line_header *lh)
19908 /* Is the file number a valid index into the line header's file name
19909 table? Remember that file numbers start with one, not zero. */
19910 if (1 <= file && file <= lh->num_file_names)
19912 struct file_entry *fe = &lh->file_names[file - 1];
19914 if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0)
19915 return xstrdup (fe->name);
19916 return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING,
19921 /* The compiler produced a bogus file number. We can at least
19922 record the macro definitions made in the file, even if we
19923 won't be able to find the file by name. */
19924 char fake_name[80];
19926 xsnprintf (fake_name, sizeof (fake_name),
19927 "<bad macro file number %d>", file);
19929 complaint (&symfile_complaints,
19930 _("bad file number in macro information (%d)"),
19933 return xstrdup (fake_name);
19937 /* Return the full name of file number I in *LH's file name table.
19938 Use COMP_DIR as the name of the current directory of the
19939 compilation. The result is allocated using xmalloc; the caller is
19940 responsible for freeing it. */
19942 file_full_name (int file, struct line_header *lh, const char *comp_dir)
19944 /* Is the file number a valid index into the line header's file name
19945 table? Remember that file numbers start with one, not zero. */
19946 if (1 <= file && file <= lh->num_file_names)
19948 char *relative = file_file_name (file, lh);
19950 if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL)
19952 return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL);
19955 return file_file_name (file, lh);
19959 static struct macro_source_file *
19960 macro_start_file (int file, int line,
19961 struct macro_source_file *current_file,
19962 const char *comp_dir,
19963 struct line_header *lh, struct objfile *objfile)
19965 /* File name relative to the compilation directory of this source file. */
19966 char *file_name = file_file_name (file, lh);
19968 if (! current_file)
19970 /* Note: We don't create a macro table for this compilation unit
19971 at all until we actually get a filename. */
19972 struct macro_table *macro_table = get_macro_table (objfile, comp_dir);
19974 /* If we have no current file, then this must be the start_file
19975 directive for the compilation unit's main source file. */
19976 current_file = macro_set_main (macro_table, file_name);
19977 macro_define_special (macro_table);
19980 current_file = macro_include (current_file, line, file_name);
19984 return current_file;
19988 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
19989 followed by a null byte. */
19991 copy_string (const char *buf, int len)
19993 char *s = xmalloc (len + 1);
19995 memcpy (s, buf, len);
20001 static const char *
20002 consume_improper_spaces (const char *p, const char *body)
20006 complaint (&symfile_complaints,
20007 _("macro definition contains spaces "
20008 "in formal argument list:\n`%s'"),
20020 parse_macro_definition (struct macro_source_file *file, int line,
20025 /* The body string takes one of two forms. For object-like macro
20026 definitions, it should be:
20028 <macro name> " " <definition>
20030 For function-like macro definitions, it should be:
20032 <macro name> "() " <definition>
20034 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20036 Spaces may appear only where explicitly indicated, and in the
20039 The Dwarf 2 spec says that an object-like macro's name is always
20040 followed by a space, but versions of GCC around March 2002 omit
20041 the space when the macro's definition is the empty string.
20043 The Dwarf 2 spec says that there should be no spaces between the
20044 formal arguments in a function-like macro's formal argument list,
20045 but versions of GCC around March 2002 include spaces after the
20049 /* Find the extent of the macro name. The macro name is terminated
20050 by either a space or null character (for an object-like macro) or
20051 an opening paren (for a function-like macro). */
20052 for (p = body; *p; p++)
20053 if (*p == ' ' || *p == '(')
20056 if (*p == ' ' || *p == '\0')
20058 /* It's an object-like macro. */
20059 int name_len = p - body;
20060 char *name = copy_string (body, name_len);
20061 const char *replacement;
20064 replacement = body + name_len + 1;
20067 dwarf2_macro_malformed_definition_complaint (body);
20068 replacement = body + name_len;
20071 macro_define_object (file, line, name, replacement);
20075 else if (*p == '(')
20077 /* It's a function-like macro. */
20078 char *name = copy_string (body, p - body);
20081 char **argv = xmalloc (argv_size * sizeof (*argv));
20085 p = consume_improper_spaces (p, body);
20087 /* Parse the formal argument list. */
20088 while (*p && *p != ')')
20090 /* Find the extent of the current argument name. */
20091 const char *arg_start = p;
20093 while (*p && *p != ',' && *p != ')' && *p != ' ')
20096 if (! *p || p == arg_start)
20097 dwarf2_macro_malformed_definition_complaint (body);
20100 /* Make sure argv has room for the new argument. */
20101 if (argc >= argv_size)
20104 argv = xrealloc (argv, argv_size * sizeof (*argv));
20107 argv[argc++] = copy_string (arg_start, p - arg_start);
20110 p = consume_improper_spaces (p, body);
20112 /* Consume the comma, if present. */
20117 p = consume_improper_spaces (p, body);
20126 /* Perfectly formed definition, no complaints. */
20127 macro_define_function (file, line, name,
20128 argc, (const char **) argv,
20130 else if (*p == '\0')
20132 /* Complain, but do define it. */
20133 dwarf2_macro_malformed_definition_complaint (body);
20134 macro_define_function (file, line, name,
20135 argc, (const char **) argv,
20139 /* Just complain. */
20140 dwarf2_macro_malformed_definition_complaint (body);
20143 /* Just complain. */
20144 dwarf2_macro_malformed_definition_complaint (body);
20150 for (i = 0; i < argc; i++)
20156 dwarf2_macro_malformed_definition_complaint (body);
20159 /* Skip some bytes from BYTES according to the form given in FORM.
20160 Returns the new pointer. */
20162 static const gdb_byte *
20163 skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end,
20164 enum dwarf_form form,
20165 unsigned int offset_size,
20166 struct dwarf2_section_info *section)
20168 unsigned int bytes_read;
20172 case DW_FORM_data1:
20177 case DW_FORM_data2:
20181 case DW_FORM_data4:
20185 case DW_FORM_data8:
20189 case DW_FORM_string:
20190 read_direct_string (abfd, bytes, &bytes_read);
20191 bytes += bytes_read;
20194 case DW_FORM_sec_offset:
20196 case DW_FORM_GNU_strp_alt:
20197 bytes += offset_size;
20200 case DW_FORM_block:
20201 bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read);
20202 bytes += bytes_read;
20205 case DW_FORM_block1:
20206 bytes += 1 + read_1_byte (abfd, bytes);
20208 case DW_FORM_block2:
20209 bytes += 2 + read_2_bytes (abfd, bytes);
20211 case DW_FORM_block4:
20212 bytes += 4 + read_4_bytes (abfd, bytes);
20215 case DW_FORM_sdata:
20216 case DW_FORM_udata:
20217 case DW_FORM_GNU_addr_index:
20218 case DW_FORM_GNU_str_index:
20219 bytes = gdb_skip_leb128 (bytes, buffer_end);
20222 dwarf2_section_buffer_overflow_complaint (section);
20230 complaint (&symfile_complaints,
20231 _("invalid form 0x%x in `%s'"),
20232 form, get_section_name (section));
20240 /* A helper for dwarf_decode_macros that handles skipping an unknown
20241 opcode. Returns an updated pointer to the macro data buffer; or,
20242 on error, issues a complaint and returns NULL. */
20244 static const gdb_byte *
20245 skip_unknown_opcode (unsigned int opcode,
20246 const gdb_byte **opcode_definitions,
20247 const gdb_byte *mac_ptr, const gdb_byte *mac_end,
20249 unsigned int offset_size,
20250 struct dwarf2_section_info *section)
20252 unsigned int bytes_read, i;
20254 const gdb_byte *defn;
20256 if (opcode_definitions[opcode] == NULL)
20258 complaint (&symfile_complaints,
20259 _("unrecognized DW_MACFINO opcode 0x%x"),
20264 defn = opcode_definitions[opcode];
20265 arg = read_unsigned_leb128 (abfd, defn, &bytes_read);
20266 defn += bytes_read;
20268 for (i = 0; i < arg; ++i)
20270 mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size,
20272 if (mac_ptr == NULL)
20274 /* skip_form_bytes already issued the complaint. */
20282 /* A helper function which parses the header of a macro section.
20283 If the macro section is the extended (for now called "GNU") type,
20284 then this updates *OFFSET_SIZE. Returns a pointer to just after
20285 the header, or issues a complaint and returns NULL on error. */
20287 static const gdb_byte *
20288 dwarf_parse_macro_header (const gdb_byte **opcode_definitions,
20290 const gdb_byte *mac_ptr,
20291 unsigned int *offset_size,
20292 int section_is_gnu)
20294 memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *));
20296 if (section_is_gnu)
20298 unsigned int version, flags;
20300 version = read_2_bytes (abfd, mac_ptr);
20303 complaint (&symfile_complaints,
20304 _("unrecognized version `%d' in .debug_macro section"),
20310 flags = read_1_byte (abfd, mac_ptr);
20312 *offset_size = (flags & 1) ? 8 : 4;
20314 if ((flags & 2) != 0)
20315 /* We don't need the line table offset. */
20316 mac_ptr += *offset_size;
20318 /* Vendor opcode descriptions. */
20319 if ((flags & 4) != 0)
20321 unsigned int i, count;
20323 count = read_1_byte (abfd, mac_ptr);
20325 for (i = 0; i < count; ++i)
20327 unsigned int opcode, bytes_read;
20330 opcode = read_1_byte (abfd, mac_ptr);
20332 opcode_definitions[opcode] = mac_ptr;
20333 arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20334 mac_ptr += bytes_read;
20343 /* A helper for dwarf_decode_macros that handles the GNU extensions,
20344 including DW_MACRO_GNU_transparent_include. */
20347 dwarf_decode_macro_bytes (bfd *abfd,
20348 const gdb_byte *mac_ptr, const gdb_byte *mac_end,
20349 struct macro_source_file *current_file,
20350 struct line_header *lh, const char *comp_dir,
20351 struct dwarf2_section_info *section,
20352 int section_is_gnu, int section_is_dwz,
20353 unsigned int offset_size,
20354 struct objfile *objfile,
20355 htab_t include_hash)
20357 enum dwarf_macro_record_type macinfo_type;
20358 int at_commandline;
20359 const gdb_byte *opcode_definitions[256];
20361 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
20362 &offset_size, section_is_gnu);
20363 if (mac_ptr == NULL)
20365 /* We already issued a complaint. */
20369 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
20370 GDB is still reading the definitions from command line. First
20371 DW_MACINFO_start_file will need to be ignored as it was already executed
20372 to create CURRENT_FILE for the main source holding also the command line
20373 definitions. On first met DW_MACINFO_start_file this flag is reset to
20374 normally execute all the remaining DW_MACINFO_start_file macinfos. */
20376 at_commandline = 1;
20380 /* Do we at least have room for a macinfo type byte? */
20381 if (mac_ptr >= mac_end)
20383 dwarf2_section_buffer_overflow_complaint (section);
20387 macinfo_type = read_1_byte (abfd, mac_ptr);
20390 /* Note that we rely on the fact that the corresponding GNU and
20391 DWARF constants are the same. */
20392 switch (macinfo_type)
20394 /* A zero macinfo type indicates the end of the macro
20399 case DW_MACRO_GNU_define:
20400 case DW_MACRO_GNU_undef:
20401 case DW_MACRO_GNU_define_indirect:
20402 case DW_MACRO_GNU_undef_indirect:
20403 case DW_MACRO_GNU_define_indirect_alt:
20404 case DW_MACRO_GNU_undef_indirect_alt:
20406 unsigned int bytes_read;
20411 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20412 mac_ptr += bytes_read;
20414 if (macinfo_type == DW_MACRO_GNU_define
20415 || macinfo_type == DW_MACRO_GNU_undef)
20417 body = read_direct_string (abfd, mac_ptr, &bytes_read);
20418 mac_ptr += bytes_read;
20422 LONGEST str_offset;
20424 str_offset = read_offset_1 (abfd, mac_ptr, offset_size);
20425 mac_ptr += offset_size;
20427 if (macinfo_type == DW_MACRO_GNU_define_indirect_alt
20428 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt
20431 struct dwz_file *dwz = dwarf2_get_dwz_file ();
20433 body = read_indirect_string_from_dwz (dwz, str_offset);
20436 body = read_indirect_string_at_offset (abfd, str_offset);
20439 is_define = (macinfo_type == DW_MACRO_GNU_define
20440 || macinfo_type == DW_MACRO_GNU_define_indirect
20441 || macinfo_type == DW_MACRO_GNU_define_indirect_alt);
20442 if (! current_file)
20444 /* DWARF violation as no main source is present. */
20445 complaint (&symfile_complaints,
20446 _("debug info with no main source gives macro %s "
20448 is_define ? _("definition") : _("undefinition"),
20452 if ((line == 0 && !at_commandline)
20453 || (line != 0 && at_commandline))
20454 complaint (&symfile_complaints,
20455 _("debug info gives %s macro %s with %s line %d: %s"),
20456 at_commandline ? _("command-line") : _("in-file"),
20457 is_define ? _("definition") : _("undefinition"),
20458 line == 0 ? _("zero") : _("non-zero"), line, body);
20461 parse_macro_definition (current_file, line, body);
20464 gdb_assert (macinfo_type == DW_MACRO_GNU_undef
20465 || macinfo_type == DW_MACRO_GNU_undef_indirect
20466 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt);
20467 macro_undef (current_file, line, body);
20472 case DW_MACRO_GNU_start_file:
20474 unsigned int bytes_read;
20477 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20478 mac_ptr += bytes_read;
20479 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20480 mac_ptr += bytes_read;
20482 if ((line == 0 && !at_commandline)
20483 || (line != 0 && at_commandline))
20484 complaint (&symfile_complaints,
20485 _("debug info gives source %d included "
20486 "from %s at %s line %d"),
20487 file, at_commandline ? _("command-line") : _("file"),
20488 line == 0 ? _("zero") : _("non-zero"), line);
20490 if (at_commandline)
20492 /* This DW_MACRO_GNU_start_file was executed in the
20494 at_commandline = 0;
20497 current_file = macro_start_file (file, line,
20498 current_file, comp_dir,
20503 case DW_MACRO_GNU_end_file:
20504 if (! current_file)
20505 complaint (&symfile_complaints,
20506 _("macro debug info has an unmatched "
20507 "`close_file' directive"));
20510 current_file = current_file->included_by;
20511 if (! current_file)
20513 enum dwarf_macro_record_type next_type;
20515 /* GCC circa March 2002 doesn't produce the zero
20516 type byte marking the end of the compilation
20517 unit. Complain if it's not there, but exit no
20520 /* Do we at least have room for a macinfo type byte? */
20521 if (mac_ptr >= mac_end)
20523 dwarf2_section_buffer_overflow_complaint (section);
20527 /* We don't increment mac_ptr here, so this is just
20529 next_type = read_1_byte (abfd, mac_ptr);
20530 if (next_type != 0)
20531 complaint (&symfile_complaints,
20532 _("no terminating 0-type entry for "
20533 "macros in `.debug_macinfo' section"));
20540 case DW_MACRO_GNU_transparent_include:
20541 case DW_MACRO_GNU_transparent_include_alt:
20545 bfd *include_bfd = abfd;
20546 struct dwarf2_section_info *include_section = section;
20547 struct dwarf2_section_info alt_section;
20548 const gdb_byte *include_mac_end = mac_end;
20549 int is_dwz = section_is_dwz;
20550 const gdb_byte *new_mac_ptr;
20552 offset = read_offset_1 (abfd, mac_ptr, offset_size);
20553 mac_ptr += offset_size;
20555 if (macinfo_type == DW_MACRO_GNU_transparent_include_alt)
20557 struct dwz_file *dwz = dwarf2_get_dwz_file ();
20559 dwarf2_read_section (dwarf2_per_objfile->objfile,
20562 include_section = &dwz->macro;
20563 include_bfd = get_section_bfd_owner (include_section);
20564 include_mac_end = dwz->macro.buffer + dwz->macro.size;
20568 new_mac_ptr = include_section->buffer + offset;
20569 slot = htab_find_slot (include_hash, new_mac_ptr, INSERT);
20573 /* This has actually happened; see
20574 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
20575 complaint (&symfile_complaints,
20576 _("recursive DW_MACRO_GNU_transparent_include in "
20577 ".debug_macro section"));
20581 *slot = (void *) new_mac_ptr;
20583 dwarf_decode_macro_bytes (include_bfd, new_mac_ptr,
20584 include_mac_end, current_file,
20586 section, section_is_gnu, is_dwz,
20587 offset_size, objfile, include_hash);
20589 htab_remove_elt (include_hash, (void *) new_mac_ptr);
20594 case DW_MACINFO_vendor_ext:
20595 if (!section_is_gnu)
20597 unsigned int bytes_read;
20600 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20601 mac_ptr += bytes_read;
20602 read_direct_string (abfd, mac_ptr, &bytes_read);
20603 mac_ptr += bytes_read;
20605 /* We don't recognize any vendor extensions. */
20611 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
20612 mac_ptr, mac_end, abfd, offset_size,
20614 if (mac_ptr == NULL)
20618 } while (macinfo_type != 0);
20622 dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset,
20623 const char *comp_dir, int section_is_gnu)
20625 struct objfile *objfile = dwarf2_per_objfile->objfile;
20626 struct line_header *lh = cu->line_header;
20628 const gdb_byte *mac_ptr, *mac_end;
20629 struct macro_source_file *current_file = 0;
20630 enum dwarf_macro_record_type macinfo_type;
20631 unsigned int offset_size = cu->header.offset_size;
20632 const gdb_byte *opcode_definitions[256];
20633 struct cleanup *cleanup;
20634 htab_t include_hash;
20636 struct dwarf2_section_info *section;
20637 const char *section_name;
20639 if (cu->dwo_unit != NULL)
20641 if (section_is_gnu)
20643 section = &cu->dwo_unit->dwo_file->sections.macro;
20644 section_name = ".debug_macro.dwo";
20648 section = &cu->dwo_unit->dwo_file->sections.macinfo;
20649 section_name = ".debug_macinfo.dwo";
20654 if (section_is_gnu)
20656 section = &dwarf2_per_objfile->macro;
20657 section_name = ".debug_macro";
20661 section = &dwarf2_per_objfile->macinfo;
20662 section_name = ".debug_macinfo";
20666 dwarf2_read_section (objfile, section);
20667 if (section->buffer == NULL)
20669 complaint (&symfile_complaints, _("missing %s section"), section_name);
20672 abfd = get_section_bfd_owner (section);
20674 /* First pass: Find the name of the base filename.
20675 This filename is needed in order to process all macros whose definition
20676 (or undefinition) comes from the command line. These macros are defined
20677 before the first DW_MACINFO_start_file entry, and yet still need to be
20678 associated to the base file.
20680 To determine the base file name, we scan the macro definitions until we
20681 reach the first DW_MACINFO_start_file entry. We then initialize
20682 CURRENT_FILE accordingly so that any macro definition found before the
20683 first DW_MACINFO_start_file can still be associated to the base file. */
20685 mac_ptr = section->buffer + offset;
20686 mac_end = section->buffer + section->size;
20688 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
20689 &offset_size, section_is_gnu);
20690 if (mac_ptr == NULL)
20692 /* We already issued a complaint. */
20698 /* Do we at least have room for a macinfo type byte? */
20699 if (mac_ptr >= mac_end)
20701 /* Complaint is printed during the second pass as GDB will probably
20702 stop the first pass earlier upon finding
20703 DW_MACINFO_start_file. */
20707 macinfo_type = read_1_byte (abfd, mac_ptr);
20710 /* Note that we rely on the fact that the corresponding GNU and
20711 DWARF constants are the same. */
20712 switch (macinfo_type)
20714 /* A zero macinfo type indicates the end of the macro
20719 case DW_MACRO_GNU_define:
20720 case DW_MACRO_GNU_undef:
20721 /* Only skip the data by MAC_PTR. */
20723 unsigned int bytes_read;
20725 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20726 mac_ptr += bytes_read;
20727 read_direct_string (abfd, mac_ptr, &bytes_read);
20728 mac_ptr += bytes_read;
20732 case DW_MACRO_GNU_start_file:
20734 unsigned int bytes_read;
20737 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20738 mac_ptr += bytes_read;
20739 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20740 mac_ptr += bytes_read;
20742 current_file = macro_start_file (file, line, current_file,
20743 comp_dir, lh, objfile);
20747 case DW_MACRO_GNU_end_file:
20748 /* No data to skip by MAC_PTR. */
20751 case DW_MACRO_GNU_define_indirect:
20752 case DW_MACRO_GNU_undef_indirect:
20753 case DW_MACRO_GNU_define_indirect_alt:
20754 case DW_MACRO_GNU_undef_indirect_alt:
20756 unsigned int bytes_read;
20758 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20759 mac_ptr += bytes_read;
20760 mac_ptr += offset_size;
20764 case DW_MACRO_GNU_transparent_include:
20765 case DW_MACRO_GNU_transparent_include_alt:
20766 /* Note that, according to the spec, a transparent include
20767 chain cannot call DW_MACRO_GNU_start_file. So, we can just
20768 skip this opcode. */
20769 mac_ptr += offset_size;
20772 case DW_MACINFO_vendor_ext:
20773 /* Only skip the data by MAC_PTR. */
20774 if (!section_is_gnu)
20776 unsigned int bytes_read;
20778 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
20779 mac_ptr += bytes_read;
20780 read_direct_string (abfd, mac_ptr, &bytes_read);
20781 mac_ptr += bytes_read;
20786 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
20787 mac_ptr, mac_end, abfd, offset_size,
20789 if (mac_ptr == NULL)
20793 } while (macinfo_type != 0 && current_file == NULL);
20795 /* Second pass: Process all entries.
20797 Use the AT_COMMAND_LINE flag to determine whether we are still processing
20798 command-line macro definitions/undefinitions. This flag is unset when we
20799 reach the first DW_MACINFO_start_file entry. */
20801 include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
20802 NULL, xcalloc, xfree);
20803 cleanup = make_cleanup_htab_delete (include_hash);
20804 mac_ptr = section->buffer + offset;
20805 slot = htab_find_slot (include_hash, mac_ptr, INSERT);
20806 *slot = (void *) mac_ptr;
20807 dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end,
20808 current_file, lh, comp_dir, section,
20810 offset_size, objfile, include_hash);
20811 do_cleanups (cleanup);
20814 /* Check if the attribute's form is a DW_FORM_block*
20815 if so return true else false. */
20818 attr_form_is_block (const struct attribute *attr)
20820 return (attr == NULL ? 0 :
20821 attr->form == DW_FORM_block1
20822 || attr->form == DW_FORM_block2
20823 || attr->form == DW_FORM_block4
20824 || attr->form == DW_FORM_block
20825 || attr->form == DW_FORM_exprloc);
20828 /* Return non-zero if ATTR's value is a section offset --- classes
20829 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
20830 You may use DW_UNSND (attr) to retrieve such offsets.
20832 Section 7.5.4, "Attribute Encodings", explains that no attribute
20833 may have a value that belongs to more than one of these classes; it
20834 would be ambiguous if we did, because we use the same forms for all
20838 attr_form_is_section_offset (const struct attribute *attr)
20840 return (attr->form == DW_FORM_data4
20841 || attr->form == DW_FORM_data8
20842 || attr->form == DW_FORM_sec_offset);
20845 /* Return non-zero if ATTR's value falls in the 'constant' class, or
20846 zero otherwise. When this function returns true, you can apply
20847 dwarf2_get_attr_constant_value to it.
20849 However, note that for some attributes you must check
20850 attr_form_is_section_offset before using this test. DW_FORM_data4
20851 and DW_FORM_data8 are members of both the constant class, and of
20852 the classes that contain offsets into other debug sections
20853 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
20854 that, if an attribute's can be either a constant or one of the
20855 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
20856 taken as section offsets, not constants. */
20859 attr_form_is_constant (const struct attribute *attr)
20861 switch (attr->form)
20863 case DW_FORM_sdata:
20864 case DW_FORM_udata:
20865 case DW_FORM_data1:
20866 case DW_FORM_data2:
20867 case DW_FORM_data4:
20868 case DW_FORM_data8:
20876 /* DW_ADDR is always stored already as sect_offset; despite for the forms
20877 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
20880 attr_form_is_ref (const struct attribute *attr)
20882 switch (attr->form)
20884 case DW_FORM_ref_addr:
20889 case DW_FORM_ref_udata:
20890 case DW_FORM_GNU_ref_alt:
20897 /* Return the .debug_loc section to use for CU.
20898 For DWO files use .debug_loc.dwo. */
20900 static struct dwarf2_section_info *
20901 cu_debug_loc_section (struct dwarf2_cu *cu)
20904 return &cu->dwo_unit->dwo_file->sections.loc;
20905 return &dwarf2_per_objfile->loc;
20908 /* A helper function that fills in a dwarf2_loclist_baton. */
20911 fill_in_loclist_baton (struct dwarf2_cu *cu,
20912 struct dwarf2_loclist_baton *baton,
20913 const struct attribute *attr)
20915 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
20917 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
20919 baton->per_cu = cu->per_cu;
20920 gdb_assert (baton->per_cu);
20921 /* We don't know how long the location list is, but make sure we
20922 don't run off the edge of the section. */
20923 baton->size = section->size - DW_UNSND (attr);
20924 baton->data = section->buffer + DW_UNSND (attr);
20925 baton->base_address = cu->base_address;
20926 baton->from_dwo = cu->dwo_unit != NULL;
20930 dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym,
20931 struct dwarf2_cu *cu, int is_block)
20933 struct objfile *objfile = dwarf2_per_objfile->objfile;
20934 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
20936 if (attr_form_is_section_offset (attr)
20937 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
20938 the section. If so, fall through to the complaint in the
20940 && DW_UNSND (attr) < dwarf2_section_size (objfile, section))
20942 struct dwarf2_loclist_baton *baton;
20944 baton = obstack_alloc (&objfile->objfile_obstack,
20945 sizeof (struct dwarf2_loclist_baton));
20947 fill_in_loclist_baton (cu, baton, attr);
20949 if (cu->base_known == 0)
20950 complaint (&symfile_complaints,
20951 _("Location list used without "
20952 "specifying the CU base address."));
20954 SYMBOL_ACLASS_INDEX (sym) = (is_block
20955 ? dwarf2_loclist_block_index
20956 : dwarf2_loclist_index);
20957 SYMBOL_LOCATION_BATON (sym) = baton;
20961 struct dwarf2_locexpr_baton *baton;
20963 baton = obstack_alloc (&objfile->objfile_obstack,
20964 sizeof (struct dwarf2_locexpr_baton));
20965 baton->per_cu = cu->per_cu;
20966 gdb_assert (baton->per_cu);
20968 if (attr_form_is_block (attr))
20970 /* Note that we're just copying the block's data pointer
20971 here, not the actual data. We're still pointing into the
20972 info_buffer for SYM's objfile; right now we never release
20973 that buffer, but when we do clean up properly this may
20975 baton->size = DW_BLOCK (attr)->size;
20976 baton->data = DW_BLOCK (attr)->data;
20980 dwarf2_invalid_attrib_class_complaint ("location description",
20981 SYMBOL_NATURAL_NAME (sym));
20985 SYMBOL_ACLASS_INDEX (sym) = (is_block
20986 ? dwarf2_locexpr_block_index
20987 : dwarf2_locexpr_index);
20988 SYMBOL_LOCATION_BATON (sym) = baton;
20992 /* Return the OBJFILE associated with the compilation unit CU. If CU
20993 came from a separate debuginfo file, then the master objfile is
20997 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
20999 struct objfile *objfile = per_cu->objfile;
21001 /* Return the master objfile, so that we can report and look up the
21002 correct file containing this variable. */
21003 if (objfile->separate_debug_objfile_backlink)
21004 objfile = objfile->separate_debug_objfile_backlink;
21009 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21010 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21011 CU_HEADERP first. */
21013 static const struct comp_unit_head *
21014 per_cu_header_read_in (struct comp_unit_head *cu_headerp,
21015 struct dwarf2_per_cu_data *per_cu)
21017 const gdb_byte *info_ptr;
21020 return &per_cu->cu->header;
21022 info_ptr = per_cu->section->buffer + per_cu->offset.sect_off;
21024 memset (cu_headerp, 0, sizeof (*cu_headerp));
21025 read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd);
21030 /* Return the address size given in the compilation unit header for CU. */
21033 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
21035 struct comp_unit_head cu_header_local;
21036 const struct comp_unit_head *cu_headerp;
21038 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
21040 return cu_headerp->addr_size;
21043 /* Return the offset size given in the compilation unit header for CU. */
21046 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
21048 struct comp_unit_head cu_header_local;
21049 const struct comp_unit_head *cu_headerp;
21051 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
21053 return cu_headerp->offset_size;
21056 /* See its dwarf2loc.h declaration. */
21059 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu)
21061 struct comp_unit_head cu_header_local;
21062 const struct comp_unit_head *cu_headerp;
21064 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
21066 if (cu_headerp->version == 2)
21067 return cu_headerp->addr_size;
21069 return cu_headerp->offset_size;
21072 /* Return the text offset of the CU. The returned offset comes from
21073 this CU's objfile. If this objfile came from a separate debuginfo
21074 file, then the offset may be different from the corresponding
21075 offset in the parent objfile. */
21078 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
21080 struct objfile *objfile = per_cu->objfile;
21082 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
21085 /* Locate the .debug_info compilation unit from CU's objfile which contains
21086 the DIE at OFFSET. Raises an error on failure. */
21088 static struct dwarf2_per_cu_data *
21089 dwarf2_find_containing_comp_unit (sect_offset offset,
21090 unsigned int offset_in_dwz,
21091 struct objfile *objfile)
21093 struct dwarf2_per_cu_data *this_cu;
21095 const sect_offset *cu_off;
21098 high = dwarf2_per_objfile->n_comp_units - 1;
21101 struct dwarf2_per_cu_data *mid_cu;
21102 int mid = low + (high - low) / 2;
21104 mid_cu = dwarf2_per_objfile->all_comp_units[mid];
21105 cu_off = &mid_cu->offset;
21106 if (mid_cu->is_dwz > offset_in_dwz
21107 || (mid_cu->is_dwz == offset_in_dwz
21108 && cu_off->sect_off >= offset.sect_off))
21113 gdb_assert (low == high);
21114 this_cu = dwarf2_per_objfile->all_comp_units[low];
21115 cu_off = &this_cu->offset;
21116 if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off)
21118 if (low == 0 || this_cu->is_dwz != offset_in_dwz)
21119 error (_("Dwarf Error: could not find partial DIE containing "
21120 "offset 0x%lx [in module %s]"),
21121 (long) offset.sect_off, bfd_get_filename (objfile->obfd));
21123 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off
21124 <= offset.sect_off);
21125 return dwarf2_per_objfile->all_comp_units[low-1];
21129 this_cu = dwarf2_per_objfile->all_comp_units[low];
21130 if (low == dwarf2_per_objfile->n_comp_units - 1
21131 && offset.sect_off >= this_cu->offset.sect_off + this_cu->length)
21132 error (_("invalid dwarf2 offset %u"), offset.sect_off);
21133 gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length);
21138 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21141 init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu)
21143 memset (cu, 0, sizeof (*cu));
21145 cu->per_cu = per_cu;
21146 cu->objfile = per_cu->objfile;
21147 obstack_init (&cu->comp_unit_obstack);
21150 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21153 prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die,
21154 enum language pretend_language)
21156 struct attribute *attr;
21158 /* Set the language we're debugging. */
21159 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
21161 set_cu_language (DW_UNSND (attr), cu);
21164 cu->language = pretend_language;
21165 cu->language_defn = language_def (cu->language);
21168 attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu);
21170 cu->producer = DW_STRING (attr);
21173 /* Release one cached compilation unit, CU. We unlink it from the tree
21174 of compilation units, but we don't remove it from the read_in_chain;
21175 the caller is responsible for that.
21176 NOTE: DATA is a void * because this function is also used as a
21177 cleanup routine. */
21180 free_heap_comp_unit (void *data)
21182 struct dwarf2_cu *cu = data;
21184 gdb_assert (cu->per_cu != NULL);
21185 cu->per_cu->cu = NULL;
21188 obstack_free (&cu->comp_unit_obstack, NULL);
21193 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21194 when we're finished with it. We can't free the pointer itself, but be
21195 sure to unlink it from the cache. Also release any associated storage. */
21198 free_stack_comp_unit (void *data)
21200 struct dwarf2_cu *cu = data;
21202 gdb_assert (cu->per_cu != NULL);
21203 cu->per_cu->cu = NULL;
21206 obstack_free (&cu->comp_unit_obstack, NULL);
21207 cu->partial_dies = NULL;
21210 /* Free all cached compilation units. */
21213 free_cached_comp_units (void *data)
21215 struct dwarf2_per_cu_data *per_cu, **last_chain;
21217 per_cu = dwarf2_per_objfile->read_in_chain;
21218 last_chain = &dwarf2_per_objfile->read_in_chain;
21219 while (per_cu != NULL)
21221 struct dwarf2_per_cu_data *next_cu;
21223 next_cu = per_cu->cu->read_in_chain;
21225 free_heap_comp_unit (per_cu->cu);
21226 *last_chain = next_cu;
21232 /* Increase the age counter on each cached compilation unit, and free
21233 any that are too old. */
21236 age_cached_comp_units (void)
21238 struct dwarf2_per_cu_data *per_cu, **last_chain;
21240 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
21241 per_cu = dwarf2_per_objfile->read_in_chain;
21242 while (per_cu != NULL)
21244 per_cu->cu->last_used ++;
21245 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
21246 dwarf2_mark (per_cu->cu);
21247 per_cu = per_cu->cu->read_in_chain;
21250 per_cu = dwarf2_per_objfile->read_in_chain;
21251 last_chain = &dwarf2_per_objfile->read_in_chain;
21252 while (per_cu != NULL)
21254 struct dwarf2_per_cu_data *next_cu;
21256 next_cu = per_cu->cu->read_in_chain;
21258 if (!per_cu->cu->mark)
21260 free_heap_comp_unit (per_cu->cu);
21261 *last_chain = next_cu;
21264 last_chain = &per_cu->cu->read_in_chain;
21270 /* Remove a single compilation unit from the cache. */
21273 free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu)
21275 struct dwarf2_per_cu_data *per_cu, **last_chain;
21277 per_cu = dwarf2_per_objfile->read_in_chain;
21278 last_chain = &dwarf2_per_objfile->read_in_chain;
21279 while (per_cu != NULL)
21281 struct dwarf2_per_cu_data *next_cu;
21283 next_cu = per_cu->cu->read_in_chain;
21285 if (per_cu == target_per_cu)
21287 free_heap_comp_unit (per_cu->cu);
21289 *last_chain = next_cu;
21293 last_chain = &per_cu->cu->read_in_chain;
21299 /* Release all extra memory associated with OBJFILE. */
21302 dwarf2_free_objfile (struct objfile *objfile)
21304 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
21306 if (dwarf2_per_objfile == NULL)
21309 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21310 free_cached_comp_units (NULL);
21312 if (dwarf2_per_objfile->quick_file_names_table)
21313 htab_delete (dwarf2_per_objfile->quick_file_names_table);
21315 /* Everything else should be on the objfile obstack. */
21318 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
21319 We store these in a hash table separate from the DIEs, and preserve them
21320 when the DIEs are flushed out of cache.
21322 The CU "per_cu" pointer is needed because offset alone is not enough to
21323 uniquely identify the type. A file may have multiple .debug_types sections,
21324 or the type may come from a DWO file. Furthermore, while it's more logical
21325 to use per_cu->section+offset, with Fission the section with the data is in
21326 the DWO file but we don't know that section at the point we need it.
21327 We have to use something in dwarf2_per_cu_data (or the pointer to it)
21328 because we can enter the lookup routine, get_die_type_at_offset, from
21329 outside this file, and thus won't necessarily have PER_CU->cu.
21330 Fortunately, PER_CU is stable for the life of the objfile. */
21332 struct dwarf2_per_cu_offset_and_type
21334 const struct dwarf2_per_cu_data *per_cu;
21335 sect_offset offset;
21339 /* Hash function for a dwarf2_per_cu_offset_and_type. */
21342 per_cu_offset_and_type_hash (const void *item)
21344 const struct dwarf2_per_cu_offset_and_type *ofs = item;
21346 return (uintptr_t) ofs->per_cu + ofs->offset.sect_off;
21349 /* Equality function for a dwarf2_per_cu_offset_and_type. */
21352 per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs)
21354 const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs;
21355 const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs;
21357 return (ofs_lhs->per_cu == ofs_rhs->per_cu
21358 && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off);
21361 /* Set the type associated with DIE to TYPE. Save it in CU's hash
21362 table if necessary. For convenience, return TYPE.
21364 The DIEs reading must have careful ordering to:
21365 * Not cause infite loops trying to read in DIEs as a prerequisite for
21366 reading current DIE.
21367 * Not trying to dereference contents of still incompletely read in types
21368 while reading in other DIEs.
21369 * Enable referencing still incompletely read in types just by a pointer to
21370 the type without accessing its fields.
21372 Therefore caller should follow these rules:
21373 * Try to fetch any prerequisite types we may need to build this DIE type
21374 before building the type and calling set_die_type.
21375 * After building type call set_die_type for current DIE as soon as
21376 possible before fetching more types to complete the current type.
21377 * Make the type as complete as possible before fetching more types. */
21379 static struct type *
21380 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
21382 struct dwarf2_per_cu_offset_and_type **slot, ofs;
21383 struct objfile *objfile = cu->objfile;
21385 /* For Ada types, make sure that the gnat-specific data is always
21386 initialized (if not already set). There are a few types where
21387 we should not be doing so, because the type-specific area is
21388 already used to hold some other piece of info (eg: TYPE_CODE_FLT
21389 where the type-specific area is used to store the floatformat).
21390 But this is not a problem, because the gnat-specific information
21391 is actually not needed for these types. */
21392 if (need_gnat_info (cu)
21393 && TYPE_CODE (type) != TYPE_CODE_FUNC
21394 && TYPE_CODE (type) != TYPE_CODE_FLT
21395 && !HAVE_GNAT_AUX_INFO (type))
21396 INIT_GNAT_SPECIFIC (type);
21398 if (dwarf2_per_objfile->die_type_hash == NULL)
21400 dwarf2_per_objfile->die_type_hash =
21401 htab_create_alloc_ex (127,
21402 per_cu_offset_and_type_hash,
21403 per_cu_offset_and_type_eq,
21405 &objfile->objfile_obstack,
21406 hashtab_obstack_allocate,
21407 dummy_obstack_deallocate);
21410 ofs.per_cu = cu->per_cu;
21411 ofs.offset = die->offset;
21413 slot = (struct dwarf2_per_cu_offset_and_type **)
21414 htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT);
21416 complaint (&symfile_complaints,
21417 _("A problem internal to GDB: DIE 0x%x has type already set"),
21418 die->offset.sect_off);
21419 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
21424 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
21425 or return NULL if the die does not have a saved type. */
21427 static struct type *
21428 get_die_type_at_offset (sect_offset offset,
21429 struct dwarf2_per_cu_data *per_cu)
21431 struct dwarf2_per_cu_offset_and_type *slot, ofs;
21433 if (dwarf2_per_objfile->die_type_hash == NULL)
21436 ofs.per_cu = per_cu;
21437 ofs.offset = offset;
21438 slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs);
21445 /* Look up the type for DIE in CU in die_type_hash,
21446 or return NULL if DIE does not have a saved type. */
21448 static struct type *
21449 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
21451 return get_die_type_at_offset (die->offset, cu->per_cu);
21454 /* Add a dependence relationship from CU to REF_PER_CU. */
21457 dwarf2_add_dependence (struct dwarf2_cu *cu,
21458 struct dwarf2_per_cu_data *ref_per_cu)
21462 if (cu->dependencies == NULL)
21464 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
21465 NULL, &cu->comp_unit_obstack,
21466 hashtab_obstack_allocate,
21467 dummy_obstack_deallocate);
21469 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
21471 *slot = ref_per_cu;
21474 /* Subroutine of dwarf2_mark to pass to htab_traverse.
21475 Set the mark field in every compilation unit in the
21476 cache that we must keep because we are keeping CU. */
21479 dwarf2_mark_helper (void **slot, void *data)
21481 struct dwarf2_per_cu_data *per_cu;
21483 per_cu = (struct dwarf2_per_cu_data *) *slot;
21485 /* cu->dependencies references may not yet have been ever read if QUIT aborts
21486 reading of the chain. As such dependencies remain valid it is not much
21487 useful to track and undo them during QUIT cleanups. */
21488 if (per_cu->cu == NULL)
21491 if (per_cu->cu->mark)
21493 per_cu->cu->mark = 1;
21495 if (per_cu->cu->dependencies != NULL)
21496 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
21501 /* Set the mark field in CU and in every other compilation unit in the
21502 cache that we must keep because we are keeping CU. */
21505 dwarf2_mark (struct dwarf2_cu *cu)
21510 if (cu->dependencies != NULL)
21511 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
21515 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
21519 per_cu->cu->mark = 0;
21520 per_cu = per_cu->cu->read_in_chain;
21524 /* Trivial hash function for partial_die_info: the hash value of a DIE
21525 is its offset in .debug_info for this objfile. */
21528 partial_die_hash (const void *item)
21530 const struct partial_die_info *part_die = item;
21532 return part_die->offset.sect_off;
21535 /* Trivial comparison function for partial_die_info structures: two DIEs
21536 are equal if they have the same offset. */
21539 partial_die_eq (const void *item_lhs, const void *item_rhs)
21541 const struct partial_die_info *part_die_lhs = item_lhs;
21542 const struct partial_die_info *part_die_rhs = item_rhs;
21544 return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off;
21547 static struct cmd_list_element *set_dwarf2_cmdlist;
21548 static struct cmd_list_element *show_dwarf2_cmdlist;
21551 set_dwarf2_cmd (char *args, int from_tty)
21553 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
21557 show_dwarf2_cmd (char *args, int from_tty)
21559 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
21562 /* Free data associated with OBJFILE, if necessary. */
21565 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
21567 struct dwarf2_per_objfile *data = d;
21570 /* Make sure we don't accidentally use dwarf2_per_objfile while
21572 dwarf2_per_objfile = NULL;
21574 for (ix = 0; ix < data->n_comp_units; ++ix)
21575 VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs);
21577 for (ix = 0; ix < data->n_type_units; ++ix)
21578 VEC_free (dwarf2_per_cu_ptr,
21579 data->all_type_units[ix]->per_cu.imported_symtabs);
21580 xfree (data->all_type_units);
21582 VEC_free (dwarf2_section_info_def, data->types);
21584 if (data->dwo_files)
21585 free_dwo_files (data->dwo_files, objfile);
21586 if (data->dwp_file)
21587 gdb_bfd_unref (data->dwp_file->dbfd);
21589 if (data->dwz_file && data->dwz_file->dwz_bfd)
21590 gdb_bfd_unref (data->dwz_file->dwz_bfd);
21594 /* The "save gdb-index" command. */
21596 /* The contents of the hash table we create when building the string
21598 struct strtab_entry
21600 offset_type offset;
21604 /* Hash function for a strtab_entry.
21606 Function is used only during write_hash_table so no index format backward
21607 compatibility is needed. */
21610 hash_strtab_entry (const void *e)
21612 const struct strtab_entry *entry = e;
21613 return mapped_index_string_hash (INT_MAX, entry->str);
21616 /* Equality function for a strtab_entry. */
21619 eq_strtab_entry (const void *a, const void *b)
21621 const struct strtab_entry *ea = a;
21622 const struct strtab_entry *eb = b;
21623 return !strcmp (ea->str, eb->str);
21626 /* Create a strtab_entry hash table. */
21629 create_strtab (void)
21631 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
21632 xfree, xcalloc, xfree);
21635 /* Add a string to the constant pool. Return the string's offset in
21639 add_string (htab_t table, struct obstack *cpool, const char *str)
21642 struct strtab_entry entry;
21643 struct strtab_entry *result;
21646 slot = htab_find_slot (table, &entry, INSERT);
21651 result = XNEW (struct strtab_entry);
21652 result->offset = obstack_object_size (cpool);
21654 obstack_grow_str0 (cpool, str);
21657 return result->offset;
21660 /* An entry in the symbol table. */
21661 struct symtab_index_entry
21663 /* The name of the symbol. */
21665 /* The offset of the name in the constant pool. */
21666 offset_type index_offset;
21667 /* A sorted vector of the indices of all the CUs that hold an object
21669 VEC (offset_type) *cu_indices;
21672 /* The symbol table. This is a power-of-2-sized hash table. */
21673 struct mapped_symtab
21675 offset_type n_elements;
21677 struct symtab_index_entry **data;
21680 /* Hash function for a symtab_index_entry. */
21683 hash_symtab_entry (const void *e)
21685 const struct symtab_index_entry *entry = e;
21686 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
21687 sizeof (offset_type) * VEC_length (offset_type,
21688 entry->cu_indices),
21692 /* Equality function for a symtab_index_entry. */
21695 eq_symtab_entry (const void *a, const void *b)
21697 const struct symtab_index_entry *ea = a;
21698 const struct symtab_index_entry *eb = b;
21699 int len = VEC_length (offset_type, ea->cu_indices);
21700 if (len != VEC_length (offset_type, eb->cu_indices))
21702 return !memcmp (VEC_address (offset_type, ea->cu_indices),
21703 VEC_address (offset_type, eb->cu_indices),
21704 sizeof (offset_type) * len);
21707 /* Destroy a symtab_index_entry. */
21710 delete_symtab_entry (void *p)
21712 struct symtab_index_entry *entry = p;
21713 VEC_free (offset_type, entry->cu_indices);
21717 /* Create a hash table holding symtab_index_entry objects. */
21720 create_symbol_hash_table (void)
21722 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
21723 delete_symtab_entry, xcalloc, xfree);
21726 /* Create a new mapped symtab object. */
21728 static struct mapped_symtab *
21729 create_mapped_symtab (void)
21731 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
21732 symtab->n_elements = 0;
21733 symtab->size = 1024;
21734 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
21738 /* Destroy a mapped_symtab. */
21741 cleanup_mapped_symtab (void *p)
21743 struct mapped_symtab *symtab = p;
21744 /* The contents of the array are freed when the other hash table is
21746 xfree (symtab->data);
21750 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
21753 Function is used only during write_hash_table so no index format backward
21754 compatibility is needed. */
21756 static struct symtab_index_entry **
21757 find_slot (struct mapped_symtab *symtab, const char *name)
21759 offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name);
21761 index = hash & (symtab->size - 1);
21762 step = ((hash * 17) & (symtab->size - 1)) | 1;
21766 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
21767 return &symtab->data[index];
21768 index = (index + step) & (symtab->size - 1);
21772 /* Expand SYMTAB's hash table. */
21775 hash_expand (struct mapped_symtab *symtab)
21777 offset_type old_size = symtab->size;
21779 struct symtab_index_entry **old_entries = symtab->data;
21782 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
21784 for (i = 0; i < old_size; ++i)
21786 if (old_entries[i])
21788 struct symtab_index_entry **slot = find_slot (symtab,
21789 old_entries[i]->name);
21790 *slot = old_entries[i];
21794 xfree (old_entries);
21797 /* Add an entry to SYMTAB. NAME is the name of the symbol.
21798 CU_INDEX is the index of the CU in which the symbol appears.
21799 IS_STATIC is one if the symbol is static, otherwise zero (global). */
21802 add_index_entry (struct mapped_symtab *symtab, const char *name,
21803 int is_static, gdb_index_symbol_kind kind,
21804 offset_type cu_index)
21806 struct symtab_index_entry **slot;
21807 offset_type cu_index_and_attrs;
21809 ++symtab->n_elements;
21810 if (4 * symtab->n_elements / 3 >= symtab->size)
21811 hash_expand (symtab);
21813 slot = find_slot (symtab, name);
21816 *slot = XNEW (struct symtab_index_entry);
21817 (*slot)->name = name;
21818 /* index_offset is set later. */
21819 (*slot)->cu_indices = NULL;
21822 cu_index_and_attrs = 0;
21823 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index);
21824 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static);
21825 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind);
21827 /* We don't want to record an index value twice as we want to avoid the
21829 We process all global symbols and then all static symbols
21830 (which would allow us to avoid the duplication by only having to check
21831 the last entry pushed), but a symbol could have multiple kinds in one CU.
21832 To keep things simple we don't worry about the duplication here and
21833 sort and uniqufy the list after we've processed all symbols. */
21834 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs);
21837 /* qsort helper routine for uniquify_cu_indices. */
21840 offset_type_compare (const void *ap, const void *bp)
21842 offset_type a = *(offset_type *) ap;
21843 offset_type b = *(offset_type *) bp;
21845 return (a > b) - (b > a);
21848 /* Sort and remove duplicates of all symbols' cu_indices lists. */
21851 uniquify_cu_indices (struct mapped_symtab *symtab)
21855 for (i = 0; i < symtab->size; ++i)
21857 struct symtab_index_entry *entry = symtab->data[i];
21860 && entry->cu_indices != NULL)
21862 unsigned int next_to_insert, next_to_check;
21863 offset_type last_value;
21865 qsort (VEC_address (offset_type, entry->cu_indices),
21866 VEC_length (offset_type, entry->cu_indices),
21867 sizeof (offset_type), offset_type_compare);
21869 last_value = VEC_index (offset_type, entry->cu_indices, 0);
21870 next_to_insert = 1;
21871 for (next_to_check = 1;
21872 next_to_check < VEC_length (offset_type, entry->cu_indices);
21875 if (VEC_index (offset_type, entry->cu_indices, next_to_check)
21878 last_value = VEC_index (offset_type, entry->cu_indices,
21880 VEC_replace (offset_type, entry->cu_indices, next_to_insert,
21885 VEC_truncate (offset_type, entry->cu_indices, next_to_insert);
21890 /* Add a vector of indices to the constant pool. */
21893 add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool,
21894 struct symtab_index_entry *entry)
21898 slot = htab_find_slot (symbol_hash_table, entry, INSERT);
21901 offset_type len = VEC_length (offset_type, entry->cu_indices);
21902 offset_type val = MAYBE_SWAP (len);
21907 entry->index_offset = obstack_object_size (cpool);
21909 obstack_grow (cpool, &val, sizeof (val));
21911 VEC_iterate (offset_type, entry->cu_indices, i, iter);
21914 val = MAYBE_SWAP (iter);
21915 obstack_grow (cpool, &val, sizeof (val));
21920 struct symtab_index_entry *old_entry = *slot;
21921 entry->index_offset = old_entry->index_offset;
21924 return entry->index_offset;
21927 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
21928 constant pool entries going into the obstack CPOOL. */
21931 write_hash_table (struct mapped_symtab *symtab,
21932 struct obstack *output, struct obstack *cpool)
21935 htab_t symbol_hash_table;
21938 symbol_hash_table = create_symbol_hash_table ();
21939 str_table = create_strtab ();
21941 /* We add all the index vectors to the constant pool first, to
21942 ensure alignment is ok. */
21943 for (i = 0; i < symtab->size; ++i)
21945 if (symtab->data[i])
21946 add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]);
21949 /* Now write out the hash table. */
21950 for (i = 0; i < symtab->size; ++i)
21952 offset_type str_off, vec_off;
21954 if (symtab->data[i])
21956 str_off = add_string (str_table, cpool, symtab->data[i]->name);
21957 vec_off = symtab->data[i]->index_offset;
21961 /* While 0 is a valid constant pool index, it is not valid
21962 to have 0 for both offsets. */
21967 str_off = MAYBE_SWAP (str_off);
21968 vec_off = MAYBE_SWAP (vec_off);
21970 obstack_grow (output, &str_off, sizeof (str_off));
21971 obstack_grow (output, &vec_off, sizeof (vec_off));
21974 htab_delete (str_table);
21975 htab_delete (symbol_hash_table);
21978 /* Struct to map psymtab to CU index in the index file. */
21979 struct psymtab_cu_index_map
21981 struct partial_symtab *psymtab;
21982 unsigned int cu_index;
21986 hash_psymtab_cu_index (const void *item)
21988 const struct psymtab_cu_index_map *map = item;
21990 return htab_hash_pointer (map->psymtab);
21994 eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs)
21996 const struct psymtab_cu_index_map *lhs = item_lhs;
21997 const struct psymtab_cu_index_map *rhs = item_rhs;
21999 return lhs->psymtab == rhs->psymtab;
22002 /* Helper struct for building the address table. */
22003 struct addrmap_index_data
22005 struct objfile *objfile;
22006 struct obstack *addr_obstack;
22007 htab_t cu_index_htab;
22009 /* Non-zero if the previous_* fields are valid.
22010 We can't write an entry until we see the next entry (since it is only then
22011 that we know the end of the entry). */
22012 int previous_valid;
22013 /* Index of the CU in the table of all CUs in the index file. */
22014 unsigned int previous_cu_index;
22015 /* Start address of the CU. */
22016 CORE_ADDR previous_cu_start;
22019 /* Write an address entry to OBSTACK. */
22022 add_address_entry (struct objfile *objfile, struct obstack *obstack,
22023 CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
22025 offset_type cu_index_to_write;
22027 CORE_ADDR baseaddr;
22029 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
22031 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr);
22032 obstack_grow (obstack, addr, 8);
22033 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr);
22034 obstack_grow (obstack, addr, 8);
22035 cu_index_to_write = MAYBE_SWAP (cu_index);
22036 obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type));
22039 /* Worker function for traversing an addrmap to build the address table. */
22042 add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj)
22044 struct addrmap_index_data *data = datap;
22045 struct partial_symtab *pst = obj;
22047 if (data->previous_valid)
22048 add_address_entry (data->objfile, data->addr_obstack,
22049 data->previous_cu_start, start_addr,
22050 data->previous_cu_index);
22052 data->previous_cu_start = start_addr;
22055 struct psymtab_cu_index_map find_map, *map;
22056 find_map.psymtab = pst;
22057 map = htab_find (data->cu_index_htab, &find_map);
22058 gdb_assert (map != NULL);
22059 data->previous_cu_index = map->cu_index;
22060 data->previous_valid = 1;
22063 data->previous_valid = 0;
22068 /* Write OBJFILE's address map to OBSTACK.
22069 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22070 in the index file. */
22073 write_address_map (struct objfile *objfile, struct obstack *obstack,
22074 htab_t cu_index_htab)
22076 struct addrmap_index_data addrmap_index_data;
22078 /* When writing the address table, we have to cope with the fact that
22079 the addrmap iterator only provides the start of a region; we have to
22080 wait until the next invocation to get the start of the next region. */
22082 addrmap_index_data.objfile = objfile;
22083 addrmap_index_data.addr_obstack = obstack;
22084 addrmap_index_data.cu_index_htab = cu_index_htab;
22085 addrmap_index_data.previous_valid = 0;
22087 addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker,
22088 &addrmap_index_data);
22090 /* It's highly unlikely the last entry (end address = 0xff...ff)
22091 is valid, but we should still handle it.
22092 The end address is recorded as the start of the next region, but that
22093 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22095 if (addrmap_index_data.previous_valid)
22096 add_address_entry (objfile, obstack,
22097 addrmap_index_data.previous_cu_start, (CORE_ADDR) -1,
22098 addrmap_index_data.previous_cu_index);
22101 /* Return the symbol kind of PSYM. */
22103 static gdb_index_symbol_kind
22104 symbol_kind (struct partial_symbol *psym)
22106 domain_enum domain = PSYMBOL_DOMAIN (psym);
22107 enum address_class aclass = PSYMBOL_CLASS (psym);
22115 return GDB_INDEX_SYMBOL_KIND_FUNCTION;
22117 return GDB_INDEX_SYMBOL_KIND_TYPE;
22119 case LOC_CONST_BYTES:
22120 case LOC_OPTIMIZED_OUT:
22122 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
22124 /* Note: It's currently impossible to recognize psyms as enum values
22125 short of reading the type info. For now punt. */
22126 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
22128 /* There are other LOC_FOO values that one might want to classify
22129 as variables, but dwarf2read.c doesn't currently use them. */
22130 return GDB_INDEX_SYMBOL_KIND_OTHER;
22132 case STRUCT_DOMAIN:
22133 return GDB_INDEX_SYMBOL_KIND_TYPE;
22135 return GDB_INDEX_SYMBOL_KIND_OTHER;
22139 /* Add a list of partial symbols to SYMTAB. */
22142 write_psymbols (struct mapped_symtab *symtab,
22144 struct partial_symbol **psymp,
22146 offset_type cu_index,
22149 for (; count-- > 0; ++psymp)
22151 struct partial_symbol *psym = *psymp;
22154 if (SYMBOL_LANGUAGE (psym) == language_ada)
22155 error (_("Ada is not currently supported by the index"));
22157 /* Only add a given psymbol once. */
22158 slot = htab_find_slot (psyms_seen, psym, INSERT);
22161 gdb_index_symbol_kind kind = symbol_kind (psym);
22164 add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym),
22165 is_static, kind, cu_index);
22170 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22171 exception if there is an error. */
22174 write_obstack (FILE *file, struct obstack *obstack)
22176 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
22178 != obstack_object_size (obstack))
22179 error (_("couldn't data write to file"));
22182 /* Unlink a file if the argument is not NULL. */
22185 unlink_if_set (void *p)
22187 char **filename = p;
22189 unlink (*filename);
22192 /* A helper struct used when iterating over debug_types. */
22193 struct signatured_type_index_data
22195 struct objfile *objfile;
22196 struct mapped_symtab *symtab;
22197 struct obstack *types_list;
22202 /* A helper function that writes a single signatured_type to an
22206 write_one_signatured_type (void **slot, void *d)
22208 struct signatured_type_index_data *info = d;
22209 struct signatured_type *entry = (struct signatured_type *) *slot;
22210 struct partial_symtab *psymtab = entry->per_cu.v.psymtab;
22213 write_psymbols (info->symtab,
22215 info->objfile->global_psymbols.list
22216 + psymtab->globals_offset,
22217 psymtab->n_global_syms, info->cu_index,
22219 write_psymbols (info->symtab,
22221 info->objfile->static_psymbols.list
22222 + psymtab->statics_offset,
22223 psymtab->n_static_syms, info->cu_index,
22226 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
22227 entry->per_cu.offset.sect_off);
22228 obstack_grow (info->types_list, val, 8);
22229 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
22230 entry->type_offset_in_tu.cu_off);
22231 obstack_grow (info->types_list, val, 8);
22232 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
22233 obstack_grow (info->types_list, val, 8);
22240 /* Recurse into all "included" dependencies and write their symbols as
22241 if they appeared in this psymtab. */
22244 recursively_write_psymbols (struct objfile *objfile,
22245 struct partial_symtab *psymtab,
22246 struct mapped_symtab *symtab,
22248 offset_type cu_index)
22252 for (i = 0; i < psymtab->number_of_dependencies; ++i)
22253 if (psymtab->dependencies[i]->user != NULL)
22254 recursively_write_psymbols (objfile, psymtab->dependencies[i],
22255 symtab, psyms_seen, cu_index);
22257 write_psymbols (symtab,
22259 objfile->global_psymbols.list + psymtab->globals_offset,
22260 psymtab->n_global_syms, cu_index,
22262 write_psymbols (symtab,
22264 objfile->static_psymbols.list + psymtab->statics_offset,
22265 psymtab->n_static_syms, cu_index,
22269 /* Create an index file for OBJFILE in the directory DIR. */
22272 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
22274 struct cleanup *cleanup;
22275 char *filename, *cleanup_filename;
22276 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
22277 struct obstack cu_list, types_cu_list;
22280 struct mapped_symtab *symtab;
22281 offset_type val, size_of_contents, total_len;
22284 htab_t cu_index_htab;
22285 struct psymtab_cu_index_map *psymtab_cu_index_map;
22287 if (dwarf2_per_objfile->using_index)
22288 error (_("Cannot use an index to create the index"));
22290 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1)
22291 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22293 if (!objfile->psymtabs || !objfile->psymtabs_addrmap)
22296 if (stat (objfile_name (objfile), &st) < 0)
22297 perror_with_name (objfile_name (objfile));
22299 filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)),
22300 INDEX_SUFFIX, (char *) NULL);
22301 cleanup = make_cleanup (xfree, filename);
22303 out_file = gdb_fopen_cloexec (filename, "wb");
22305 error (_("Can't open `%s' for writing"), filename);
22307 cleanup_filename = filename;
22308 make_cleanup (unlink_if_set, &cleanup_filename);
22310 symtab = create_mapped_symtab ();
22311 make_cleanup (cleanup_mapped_symtab, symtab);
22313 obstack_init (&addr_obstack);
22314 make_cleanup_obstack_free (&addr_obstack);
22316 obstack_init (&cu_list);
22317 make_cleanup_obstack_free (&cu_list);
22319 obstack_init (&types_cu_list);
22320 make_cleanup_obstack_free (&types_cu_list);
22322 psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer,
22323 NULL, xcalloc, xfree);
22324 make_cleanup_htab_delete (psyms_seen);
22326 /* While we're scanning CU's create a table that maps a psymtab pointer
22327 (which is what addrmap records) to its index (which is what is recorded
22328 in the index file). This will later be needed to write the address
22330 cu_index_htab = htab_create_alloc (100,
22331 hash_psymtab_cu_index,
22332 eq_psymtab_cu_index,
22333 NULL, xcalloc, xfree);
22334 make_cleanup_htab_delete (cu_index_htab);
22335 psymtab_cu_index_map = (struct psymtab_cu_index_map *)
22336 xmalloc (sizeof (struct psymtab_cu_index_map)
22337 * dwarf2_per_objfile->n_comp_units);
22338 make_cleanup (xfree, psymtab_cu_index_map);
22340 /* The CU list is already sorted, so we don't need to do additional
22341 work here. Also, the debug_types entries do not appear in
22342 all_comp_units, but only in their own hash table. */
22343 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
22345 struct dwarf2_per_cu_data *per_cu
22346 = dwarf2_per_objfile->all_comp_units[i];
22347 struct partial_symtab *psymtab = per_cu->v.psymtab;
22349 struct psymtab_cu_index_map *map;
22352 /* CU of a shared file from 'dwz -m' may be unused by this main file.
22353 It may be referenced from a local scope but in such case it does not
22354 need to be present in .gdb_index. */
22355 if (psymtab == NULL)
22358 if (psymtab->user == NULL)
22359 recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i);
22361 map = &psymtab_cu_index_map[i];
22362 map->psymtab = psymtab;
22364 slot = htab_find_slot (cu_index_htab, map, INSERT);
22365 gdb_assert (slot != NULL);
22366 gdb_assert (*slot == NULL);
22369 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
22370 per_cu->offset.sect_off);
22371 obstack_grow (&cu_list, val, 8);
22372 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
22373 obstack_grow (&cu_list, val, 8);
22376 /* Dump the address map. */
22377 write_address_map (objfile, &addr_obstack, cu_index_htab);
22379 /* Write out the .debug_type entries, if any. */
22380 if (dwarf2_per_objfile->signatured_types)
22382 struct signatured_type_index_data sig_data;
22384 sig_data.objfile = objfile;
22385 sig_data.symtab = symtab;
22386 sig_data.types_list = &types_cu_list;
22387 sig_data.psyms_seen = psyms_seen;
22388 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
22389 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
22390 write_one_signatured_type, &sig_data);
22393 /* Now that we've processed all symbols we can shrink their cu_indices
22395 uniquify_cu_indices (symtab);
22397 obstack_init (&constant_pool);
22398 make_cleanup_obstack_free (&constant_pool);
22399 obstack_init (&symtab_obstack);
22400 make_cleanup_obstack_free (&symtab_obstack);
22401 write_hash_table (symtab, &symtab_obstack, &constant_pool);
22403 obstack_init (&contents);
22404 make_cleanup_obstack_free (&contents);
22405 size_of_contents = 6 * sizeof (offset_type);
22406 total_len = size_of_contents;
22408 /* The version number. */
22409 val = MAYBE_SWAP (8);
22410 obstack_grow (&contents, &val, sizeof (val));
22412 /* The offset of the CU list from the start of the file. */
22413 val = MAYBE_SWAP (total_len);
22414 obstack_grow (&contents, &val, sizeof (val));
22415 total_len += obstack_object_size (&cu_list);
22417 /* The offset of the types CU list from the start of the file. */
22418 val = MAYBE_SWAP (total_len);
22419 obstack_grow (&contents, &val, sizeof (val));
22420 total_len += obstack_object_size (&types_cu_list);
22422 /* The offset of the address table from the start of the file. */
22423 val = MAYBE_SWAP (total_len);
22424 obstack_grow (&contents, &val, sizeof (val));
22425 total_len += obstack_object_size (&addr_obstack);
22427 /* The offset of the symbol table from the start of the file. */
22428 val = MAYBE_SWAP (total_len);
22429 obstack_grow (&contents, &val, sizeof (val));
22430 total_len += obstack_object_size (&symtab_obstack);
22432 /* The offset of the constant pool from the start of the file. */
22433 val = MAYBE_SWAP (total_len);
22434 obstack_grow (&contents, &val, sizeof (val));
22435 total_len += obstack_object_size (&constant_pool);
22437 gdb_assert (obstack_object_size (&contents) == size_of_contents);
22439 write_obstack (out_file, &contents);
22440 write_obstack (out_file, &cu_list);
22441 write_obstack (out_file, &types_cu_list);
22442 write_obstack (out_file, &addr_obstack);
22443 write_obstack (out_file, &symtab_obstack);
22444 write_obstack (out_file, &constant_pool);
22448 /* We want to keep the file, so we set cleanup_filename to NULL
22449 here. See unlink_if_set. */
22450 cleanup_filename = NULL;
22452 do_cleanups (cleanup);
22455 /* Implementation of the `save gdb-index' command.
22457 Note that the file format used by this command is documented in the
22458 GDB manual. Any changes here must be documented there. */
22461 save_gdb_index_command (char *arg, int from_tty)
22463 struct objfile *objfile;
22466 error (_("usage: save gdb-index DIRECTORY"));
22468 ALL_OBJFILES (objfile)
22472 /* If the objfile does not correspond to an actual file, skip it. */
22473 if (stat (objfile_name (objfile), &st) < 0)
22476 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
22477 if (dwarf2_per_objfile)
22479 volatile struct gdb_exception except;
22481 TRY_CATCH (except, RETURN_MASK_ERROR)
22483 write_psymtabs_to_index (objfile, arg);
22485 if (except.reason < 0)
22486 exception_fprintf (gdb_stderr, except,
22487 _("Error while writing index for `%s': "),
22488 objfile_name (objfile));
22495 int dwarf2_always_disassemble;
22498 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
22499 struct cmd_list_element *c, const char *value)
22501 fprintf_filtered (file,
22502 _("Whether to always disassemble "
22503 "DWARF expressions is %s.\n"),
22508 show_check_physname (struct ui_file *file, int from_tty,
22509 struct cmd_list_element *c, const char *value)
22511 fprintf_filtered (file,
22512 _("Whether to check \"physname\" is %s.\n"),
22516 void _initialize_dwarf2_read (void);
22519 _initialize_dwarf2_read (void)
22521 struct cmd_list_element *c;
22523 dwarf2_objfile_data_key
22524 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
22526 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
22527 Set DWARF 2 specific variables.\n\
22528 Configure DWARF 2 variables such as the cache size"),
22529 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
22530 0/*allow-unknown*/, &maintenance_set_cmdlist);
22532 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
22533 Show DWARF 2 specific variables\n\
22534 Show DWARF 2 variables such as the cache size"),
22535 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
22536 0/*allow-unknown*/, &maintenance_show_cmdlist);
22538 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
22539 &dwarf2_max_cache_age, _("\
22540 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
22541 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
22542 A higher limit means that cached compilation units will be stored\n\
22543 in memory longer, and more total memory will be used. Zero disables\n\
22544 caching, which can slow down startup."),
22546 show_dwarf2_max_cache_age,
22547 &set_dwarf2_cmdlist,
22548 &show_dwarf2_cmdlist);
22550 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
22551 &dwarf2_always_disassemble, _("\
22552 Set whether `info address' always disassembles DWARF expressions."), _("\
22553 Show whether `info address' always disassembles DWARF expressions."), _("\
22554 When enabled, DWARF expressions are always printed in an assembly-like\n\
22555 syntax. When disabled, expressions will be printed in a more\n\
22556 conversational style, when possible."),
22558 show_dwarf2_always_disassemble,
22559 &set_dwarf2_cmdlist,
22560 &show_dwarf2_cmdlist);
22562 add_setshow_zuinteger_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\
22563 Set debugging of the dwarf2 reader."), _("\
22564 Show debugging of the dwarf2 reader."), _("\
22565 When enabled (non-zero), debugging messages are printed during dwarf2\n\
22566 reading and symtab expansion. A value of 1 (one) provides basic\n\
22567 information. A value greater than 1 provides more verbose information."),
22570 &setdebuglist, &showdebuglist);
22572 add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
22573 Set debugging of the dwarf2 DIE reader."), _("\
22574 Show debugging of the dwarf2 DIE reader."), _("\
22575 When enabled (non-zero), DIEs are dumped after they are read in.\n\
22576 The value is the maximum depth to print."),
22579 &setdebuglist, &showdebuglist);
22581 add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\
22582 Set cross-checking of \"physname\" code against demangler."), _("\
22583 Show cross-checking of \"physname\" code against demangler."), _("\
22584 When enabled, GDB's internal \"physname\" code is checked against\n\
22586 NULL, show_check_physname,
22587 &setdebuglist, &showdebuglist);
22589 add_setshow_boolean_cmd ("use-deprecated-index-sections",
22590 no_class, &use_deprecated_index_sections, _("\
22591 Set whether to use deprecated gdb_index sections."), _("\
22592 Show whether to use deprecated gdb_index sections."), _("\
22593 When enabled, deprecated .gdb_index sections are used anyway.\n\
22594 Normally they are ignored either because of a missing feature or\n\
22595 performance issue.\n\
22596 Warning: This option must be enabled before gdb reads the file."),
22599 &setlist, &showlist);
22601 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
22603 Save a gdb-index file.\n\
22604 Usage: save gdb-index DIRECTORY"),
22606 set_cmd_completer (c, filename_completer);
22608 dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED,
22609 &dwarf2_locexpr_funcs);
22610 dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED,
22611 &dwarf2_loclist_funcs);
22613 dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK,
22614 &dwarf2_block_frame_base_locexpr_funcs);
22615 dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK,
22616 &dwarf2_block_frame_base_loclist_funcs);