1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2013 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"
73 #include "gdb_string.h"
74 #include "gdb_assert.h"
75 #include <sys/types.h>
77 typedef struct symbol *symbolp;
80 /* When non-zero, print basic high level tracing messages.
81 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
82 static int dwarf2_read_debug = 0;
84 /* When non-zero, dump DIEs after they are read in. */
85 static unsigned int dwarf2_die_debug = 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname = 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 static int use_deprecated_index_sections = 0;
93 static const struct objfile_data *dwarf2_objfile_data_key;
95 /* The "aclass" indices for various kinds of computed DWARF symbols. */
97 static int dwarf2_locexpr_index;
98 static int dwarf2_loclist_index;
99 static int dwarf2_locexpr_block_index;
100 static int dwarf2_loclist_block_index;
102 struct dwarf2_section_info
107 /* True if we have tried to read this section. */
111 typedef struct dwarf2_section_info dwarf2_section_info_def;
112 DEF_VEC_O (dwarf2_section_info_def);
114 /* All offsets in the index are of this type. It must be
115 architecture-independent. */
116 typedef uint32_t offset_type;
118 DEF_VEC_I (offset_type);
120 /* Ensure only legit values are used. */
121 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
123 gdb_assert ((unsigned int) (value) <= 1); \
124 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
127 /* Ensure only legit values are used. */
128 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
130 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
131 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
132 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
135 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
136 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
138 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
139 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
142 /* A description of the mapped index. The file format is described in
143 a comment by the code that writes the index. */
146 /* Index data format version. */
149 /* The total length of the buffer. */
152 /* A pointer to the address table data. */
153 const gdb_byte *address_table;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size;
158 /* The symbol table, implemented as a hash table. */
159 const offset_type *symbol_table;
161 /* Size in slots, each slot is 2 offset_types. */
162 offset_type symbol_table_slots;
164 /* A pointer to the constant pool. */
165 const char *constant_pool;
168 typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr;
169 DEF_VEC_P (dwarf2_per_cu_ptr);
171 /* Collection of data recorded per objfile.
172 This hangs off of dwarf2_objfile_data_key. */
174 struct dwarf2_per_objfile
176 struct dwarf2_section_info info;
177 struct dwarf2_section_info abbrev;
178 struct dwarf2_section_info line;
179 struct dwarf2_section_info loc;
180 struct dwarf2_section_info macinfo;
181 struct dwarf2_section_info macro;
182 struct dwarf2_section_info str;
183 struct dwarf2_section_info ranges;
184 struct dwarf2_section_info addr;
185 struct dwarf2_section_info frame;
186 struct dwarf2_section_info eh_frame;
187 struct dwarf2_section_info gdb_index;
189 VEC (dwarf2_section_info_def) *types;
192 struct objfile *objfile;
194 /* Table of all the compilation units. This is used to locate
195 the target compilation unit of a particular reference. */
196 struct dwarf2_per_cu_data **all_comp_units;
198 /* The number of compilation units in ALL_COMP_UNITS. */
201 /* The number of .debug_types-related CUs. */
204 /* The .debug_types-related CUs (TUs). */
205 struct signatured_type **all_type_units;
207 /* The number of entries in all_type_unit_groups. */
208 int n_type_unit_groups;
210 /* Table of type unit groups.
211 This exists to make it easy to iterate over all CUs and TU groups. */
212 struct type_unit_group **all_type_unit_groups;
214 /* Table of struct type_unit_group objects.
215 The hash key is the DW_AT_stmt_list value. */
216 htab_t type_unit_groups;
218 /* A table mapping .debug_types signatures to its signatured_type entry.
219 This is NULL if the .debug_types section hasn't been read in yet. */
220 htab_t signatured_types;
222 /* Type unit statistics, to see how well the scaling improvements
226 int nr_uniq_abbrev_tables;
228 int nr_symtab_sharers;
229 int nr_stmt_less_type_units;
232 /* A chain of compilation units that are currently read in, so that
233 they can be freed later. */
234 struct dwarf2_per_cu_data *read_in_chain;
236 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
237 This is NULL if the table hasn't been allocated yet. */
240 /* Non-zero if we've check for whether there is a DWP file. */
243 /* The DWP file if there is one, or NULL. */
244 struct dwp_file *dwp_file;
246 /* The shared '.dwz' file, if one exists. This is used when the
247 original data was compressed using 'dwz -m'. */
248 struct dwz_file *dwz_file;
250 /* A flag indicating wether this objfile has a section loaded at a
252 int has_section_at_zero;
254 /* True if we are using the mapped index,
255 or we are faking it for OBJF_READNOW's sake. */
256 unsigned char using_index;
258 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
259 struct mapped_index *index_table;
261 /* When using index_table, this keeps track of all quick_file_names entries.
262 TUs typically share line table entries with a CU, so we maintain a
263 separate table of all line table entries to support the sharing.
264 Note that while there can be way more TUs than CUs, we've already
265 sorted all the TUs into "type unit groups", grouped by their
266 DW_AT_stmt_list value. Therefore the only sharing done here is with a
267 CU and its associated TU group if there is one. */
268 htab_t quick_file_names_table;
270 /* Set during partial symbol reading, to prevent queueing of full
272 int reading_partial_symbols;
274 /* Table mapping type DIEs to their struct type *.
275 This is NULL if not allocated yet.
276 The mapping is done via (CU/TU signature + DIE offset) -> type. */
277 htab_t die_type_hash;
279 /* The CUs we recently read. */
280 VEC (dwarf2_per_cu_ptr) *just_read_cus;
283 static struct dwarf2_per_objfile *dwarf2_per_objfile;
285 /* Default names of the debugging sections. */
287 /* Note that if the debugging section has been compressed, it might
288 have a name like .zdebug_info. */
290 static const struct dwarf2_debug_sections dwarf2_elf_names =
292 { ".debug_info", ".zdebug_info" },
293 { ".debug_abbrev", ".zdebug_abbrev" },
294 { ".debug_line", ".zdebug_line" },
295 { ".debug_loc", ".zdebug_loc" },
296 { ".debug_macinfo", ".zdebug_macinfo" },
297 { ".debug_macro", ".zdebug_macro" },
298 { ".debug_str", ".zdebug_str" },
299 { ".debug_ranges", ".zdebug_ranges" },
300 { ".debug_types", ".zdebug_types" },
301 { ".debug_addr", ".zdebug_addr" },
302 { ".debug_frame", ".zdebug_frame" },
303 { ".eh_frame", NULL },
304 { ".gdb_index", ".zgdb_index" },
308 /* List of DWO/DWP sections. */
310 static const struct dwop_section_names
312 struct dwarf2_section_names abbrev_dwo;
313 struct dwarf2_section_names info_dwo;
314 struct dwarf2_section_names line_dwo;
315 struct dwarf2_section_names loc_dwo;
316 struct dwarf2_section_names macinfo_dwo;
317 struct dwarf2_section_names macro_dwo;
318 struct dwarf2_section_names str_dwo;
319 struct dwarf2_section_names str_offsets_dwo;
320 struct dwarf2_section_names types_dwo;
321 struct dwarf2_section_names cu_index;
322 struct dwarf2_section_names tu_index;
326 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
327 { ".debug_info.dwo", ".zdebug_info.dwo" },
328 { ".debug_line.dwo", ".zdebug_line.dwo" },
329 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
330 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
331 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
332 { ".debug_str.dwo", ".zdebug_str.dwo" },
333 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
334 { ".debug_types.dwo", ".zdebug_types.dwo" },
335 { ".debug_cu_index", ".zdebug_cu_index" },
336 { ".debug_tu_index", ".zdebug_tu_index" },
339 /* local data types */
341 /* The data in a compilation unit header, after target2host
342 translation, looks like this. */
343 struct comp_unit_head
347 unsigned char addr_size;
348 unsigned char signed_addr_p;
349 sect_offset abbrev_offset;
351 /* Size of file offsets; either 4 or 8. */
352 unsigned int offset_size;
354 /* Size of the length field; either 4 or 12. */
355 unsigned int initial_length_size;
357 /* Offset to the first byte of this compilation unit header in the
358 .debug_info section, for resolving relative reference dies. */
361 /* Offset to first die in this cu from the start of the cu.
362 This will be the first byte following the compilation unit header. */
363 cu_offset first_die_offset;
366 /* Type used for delaying computation of method physnames.
367 See comments for compute_delayed_physnames. */
368 struct delayed_method_info
370 /* The type to which the method is attached, i.e., its parent class. */
373 /* The index of the method in the type's function fieldlists. */
376 /* The index of the method in the fieldlist. */
379 /* The name of the DIE. */
382 /* The DIE associated with this method. */
383 struct die_info *die;
386 typedef struct delayed_method_info delayed_method_info;
387 DEF_VEC_O (delayed_method_info);
389 /* Internal state when decoding a particular compilation unit. */
392 /* The objfile containing this compilation unit. */
393 struct objfile *objfile;
395 /* The header of the compilation unit. */
396 struct comp_unit_head header;
398 /* Base address of this compilation unit. */
399 CORE_ADDR base_address;
401 /* Non-zero if base_address has been set. */
404 /* The language we are debugging. */
405 enum language language;
406 const struct language_defn *language_defn;
408 const char *producer;
410 /* The generic symbol table building routines have separate lists for
411 file scope symbols and all all other scopes (local scopes). So
412 we need to select the right one to pass to add_symbol_to_list().
413 We do it by keeping a pointer to the correct list in list_in_scope.
415 FIXME: The original dwarf code just treated the file scope as the
416 first local scope, and all other local scopes as nested local
417 scopes, and worked fine. Check to see if we really need to
418 distinguish these in buildsym.c. */
419 struct pending **list_in_scope;
421 /* The abbrev table for this CU.
422 Normally this points to the abbrev table in the objfile.
423 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
424 struct abbrev_table *abbrev_table;
426 /* Hash table holding all the loaded partial DIEs
427 with partial_die->offset.SECT_OFF as hash. */
430 /* Storage for things with the same lifetime as this read-in compilation
431 unit, including partial DIEs. */
432 struct obstack comp_unit_obstack;
434 /* When multiple dwarf2_cu structures are living in memory, this field
435 chains them all together, so that they can be released efficiently.
436 We will probably also want a generation counter so that most-recently-used
437 compilation units are cached... */
438 struct dwarf2_per_cu_data *read_in_chain;
440 /* Backchain to our per_cu entry if the tree has been built. */
441 struct dwarf2_per_cu_data *per_cu;
443 /* How many compilation units ago was this CU last referenced? */
446 /* A hash table of DIE cu_offset for following references with
447 die_info->offset.sect_off as hash. */
450 /* Full DIEs if read in. */
451 struct die_info *dies;
453 /* A set of pointers to dwarf2_per_cu_data objects for compilation
454 units referenced by this one. Only set during full symbol processing;
455 partial symbol tables do not have dependencies. */
458 /* Header data from the line table, during full symbol processing. */
459 struct line_header *line_header;
461 /* A list of methods which need to have physnames computed
462 after all type information has been read. */
463 VEC (delayed_method_info) *method_list;
465 /* To be copied to symtab->call_site_htab. */
466 htab_t call_site_htab;
468 /* Non-NULL if this CU came from a DWO file.
469 There is an invariant here that is important to remember:
470 Except for attributes copied from the top level DIE in the "main"
471 (or "stub") file in preparation for reading the DWO file
472 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
473 Either there isn't a DWO file (in which case this is NULL and the point
474 is moot), or there is and either we're not going to read it (in which
475 case this is NULL) or there is and we are reading it (in which case this
477 struct dwo_unit *dwo_unit;
479 /* The DW_AT_addr_base attribute if present, zero otherwise
480 (zero is a valid value though).
481 Note this value comes from the stub CU/TU's DIE. */
484 /* The DW_AT_ranges_base attribute if present, zero otherwise
485 (zero is a valid value though).
486 Note this value comes from the stub CU/TU's DIE.
487 Also note that the value is zero in the non-DWO case so this value can
488 be used without needing to know whether DWO files are in use or not.
489 N.B. This does not apply to DW_AT_ranges appearing in
490 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
491 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
492 DW_AT_ranges_base *would* have to be applied, and we'd have to care
493 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
494 ULONGEST ranges_base;
496 /* Mark used when releasing cached dies. */
497 unsigned int mark : 1;
499 /* This CU references .debug_loc. See the symtab->locations_valid field.
500 This test is imperfect as there may exist optimized debug code not using
501 any location list and still facing inlining issues if handled as
502 unoptimized code. For a future better test see GCC PR other/32998. */
503 unsigned int has_loclist : 1;
505 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
506 if all the producer_is_* fields are valid. This information is cached
507 because profiling CU expansion showed excessive time spent in
508 producer_is_gxx_lt_4_6. */
509 unsigned int checked_producer : 1;
510 unsigned int producer_is_gxx_lt_4_6 : 1;
511 unsigned int producer_is_gcc_lt_4_3 : 1;
512 unsigned int producer_is_icc : 1;
514 /* When set, the file that we're processing is known to have
515 debugging info for C++ namespaces. GCC 3.3.x did not produce
516 this information, but later versions do. */
518 unsigned int processing_has_namespace_info : 1;
521 /* Persistent data held for a compilation unit, even when not
522 processing it. We put a pointer to this structure in the
523 read_symtab_private field of the psymtab. */
525 struct dwarf2_per_cu_data
527 /* The start offset and length of this compilation unit.
528 NOTE: Unlike comp_unit_head.length, this length includes
530 If the DIE refers to a DWO file, this is always of the original die,
535 /* Flag indicating this compilation unit will be read in before
536 any of the current compilation units are processed. */
537 unsigned int queued : 1;
539 /* This flag will be set when reading partial DIEs if we need to load
540 absolutely all DIEs for this compilation unit, instead of just the ones
541 we think are interesting. It gets set if we look for a DIE in the
542 hash table and don't find it. */
543 unsigned int load_all_dies : 1;
545 /* Non-zero if this CU is from .debug_types. */
546 unsigned int is_debug_types : 1;
548 /* Non-zero if this CU is from the .dwz file. */
549 unsigned int is_dwz : 1;
551 /* The section this CU/TU lives in.
552 If the DIE refers to a DWO file, this is always the original die,
554 struct dwarf2_section_info *section;
556 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
557 of the CU cache it gets reset to NULL again. */
558 struct dwarf2_cu *cu;
560 /* The corresponding objfile.
561 Normally we can get the objfile from dwarf2_per_objfile.
562 However we can enter this file with just a "per_cu" handle. */
563 struct objfile *objfile;
565 /* When using partial symbol tables, the 'psymtab' field is active.
566 Otherwise the 'quick' field is active. */
569 /* The partial symbol table associated with this compilation unit,
570 or NULL for unread partial units. */
571 struct partial_symtab *psymtab;
573 /* Data needed by the "quick" functions. */
574 struct dwarf2_per_cu_quick_data *quick;
577 /* The CUs we import using DW_TAG_imported_unit. This is filled in
578 while reading psymtabs, used to compute the psymtab dependencies,
579 and then cleared. Then it is filled in again while reading full
580 symbols, and only deleted when the objfile is destroyed.
582 This is also used to work around a difference between the way gold
583 generates .gdb_index version <=7 and the way gdb does. Arguably this
584 is a gold bug. For symbols coming from TUs, gold records in the index
585 the CU that includes the TU instead of the TU itself. This breaks
586 dw2_lookup_symbol: It assumes that if the index says symbol X lives
587 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
588 will find X. Alas TUs live in their own symtab, so after expanding CU Y
589 we need to look in TU Z to find X. Fortunately, this is akin to
590 DW_TAG_imported_unit, so we just use the same mechanism: For
591 .gdb_index version <=7 this also records the TUs that the CU referred
592 to. Concurrently with this change gdb was modified to emit version 8
593 indices so we only pay a price for gold generated indices. */
594 VEC (dwarf2_per_cu_ptr) *imported_symtabs;
596 /* Type units are grouped by their DW_AT_stmt_list entry so that they
597 can share them. If this is a TU, this points to the containing
599 struct type_unit_group *type_unit_group;
602 /* Entry in the signatured_types hash table. */
604 struct signatured_type
606 /* The "per_cu" object of this type.
607 N.B.: This is the first member so that it's easy to convert pointers
609 struct dwarf2_per_cu_data per_cu;
611 /* The type's signature. */
614 /* Offset in the TU of the type's DIE, as read from the TU header.
615 If the definition lives in a DWO file, this value is unusable. */
616 cu_offset type_offset_in_tu;
618 /* Offset in the section of the type's DIE.
619 If the definition lives in a DWO file, this is the offset in the
620 .debug_types.dwo section.
621 The value is zero until the actual value is known.
622 Zero is otherwise not a valid section offset. */
623 sect_offset type_offset_in_section;
626 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
627 This includes type_unit_group and quick_file_names. */
629 struct stmt_list_hash
631 /* The DWO unit this table is from or NULL if there is none. */
632 struct dwo_unit *dwo_unit;
634 /* Offset in .debug_line or .debug_line.dwo. */
635 sect_offset line_offset;
638 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
639 an object of this type. */
641 struct type_unit_group
643 /* dwarf2read.c's main "handle" on the symtab.
644 To simplify things we create an artificial CU that "includes" all the
645 type units using this stmt_list so that the rest of the code still has
646 a "per_cu" handle on the symtab.
647 This PER_CU is recognized by having no section. */
648 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
649 struct dwarf2_per_cu_data per_cu;
653 /* The TUs that share this DW_AT_stmt_list entry.
654 This is added to while parsing type units to build partial symtabs,
655 and is deleted afterwards and not used again. */
656 VEC (dwarf2_per_cu_ptr) *tus;
658 /* When reading the line table in "quick" functions, we need a real TU.
659 Any will do, we know they all share the same DW_AT_stmt_list entry.
660 For simplicity's sake, we pick the first one. */
661 struct dwarf2_per_cu_data *first_tu;
664 /* The primary symtab.
665 Type units in a group needn't all be defined in the same source file,
666 so we create an essentially anonymous symtab as the primary symtab. */
667 struct symtab *primary_symtab;
669 /* The data used to construct the hash key. */
670 struct stmt_list_hash hash;
672 /* The number of symtabs from the line header.
673 The value here must match line_header.num_file_names. */
674 unsigned int num_symtabs;
676 /* The symbol tables for this TU (obtained from the files listed in
678 WARNING: The order of entries here must match the order of entries
679 in the line header. After the first TU using this type_unit_group, the
680 line header for the subsequent TUs is recreated from this. This is done
681 because we need to use the same symtabs for each TU using the same
682 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
683 there's no guarantee the line header doesn't have duplicate entries. */
684 struct symtab **symtabs;
687 /* These sections are what may appear in a DWO file. */
691 struct dwarf2_section_info abbrev;
692 struct dwarf2_section_info line;
693 struct dwarf2_section_info loc;
694 struct dwarf2_section_info macinfo;
695 struct dwarf2_section_info macro;
696 struct dwarf2_section_info str;
697 struct dwarf2_section_info str_offsets;
698 /* In the case of a virtual DWO file, these two are unused. */
699 struct dwarf2_section_info info;
700 VEC (dwarf2_section_info_def) *types;
703 /* Common bits of DWO CUs/TUs. */
707 /* Backlink to the containing struct dwo_file. */
708 struct dwo_file *dwo_file;
710 /* The "id" that distinguishes this CU/TU.
711 .debug_info calls this "dwo_id", .debug_types calls this "signature".
712 Since signatures came first, we stick with it for consistency. */
715 /* The section this CU/TU lives in, in the DWO file. */
716 struct dwarf2_section_info *section;
718 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
722 /* For types, offset in the type's DIE of the type defined by this TU. */
723 cu_offset type_offset_in_tu;
726 /* Data for one DWO file.
727 This includes virtual DWO files that have been packaged into a
732 /* The DW_AT_GNU_dwo_name attribute. This is the hash key.
733 For virtual DWO files the name is constructed from the section offsets
734 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
735 from related CU+TUs. */
738 /* The bfd, when the file is open. Otherwise this is NULL.
739 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
742 /* Section info for this file. */
743 struct dwo_sections sections;
745 /* Table of CUs in the file.
746 Each element is a struct dwo_unit. */
749 /* Table of TUs in the file.
750 Each element is a struct dwo_unit. */
754 /* These sections are what may appear in a DWP file. */
758 struct dwarf2_section_info str;
759 struct dwarf2_section_info cu_index;
760 struct dwarf2_section_info tu_index;
761 /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
762 by section number. We don't need to record them here. */
765 /* These sections are what may appear in a virtual DWO file. */
767 struct virtual_dwo_sections
769 struct dwarf2_section_info abbrev;
770 struct dwarf2_section_info line;
771 struct dwarf2_section_info loc;
772 struct dwarf2_section_info macinfo;
773 struct dwarf2_section_info macro;
774 struct dwarf2_section_info str_offsets;
775 /* Each DWP hash table entry records one CU or one TU.
776 That is recorded here, and copied to dwo_unit.section. */
777 struct dwarf2_section_info info_or_types;
780 /* Contents of DWP hash tables. */
782 struct dwp_hash_table
784 uint32_t nr_units, nr_slots;
785 const gdb_byte *hash_table, *unit_table, *section_pool;
788 /* Data for one DWP file. */
792 /* Name of the file. */
795 /* The bfd, when the file is open. Otherwise this is NULL. */
798 /* Section info for this file. */
799 struct dwp_sections sections;
801 /* Table of CUs in the file. */
802 const struct dwp_hash_table *cus;
804 /* Table of TUs in the file. */
805 const struct dwp_hash_table *tus;
807 /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
810 /* Table to map ELF section numbers to their sections. */
811 unsigned int num_sections;
812 asection **elf_sections;
815 /* This represents a '.dwz' file. */
819 /* A dwz file can only contain a few sections. */
820 struct dwarf2_section_info abbrev;
821 struct dwarf2_section_info info;
822 struct dwarf2_section_info str;
823 struct dwarf2_section_info line;
824 struct dwarf2_section_info macro;
825 struct dwarf2_section_info gdb_index;
831 /* Struct used to pass misc. parameters to read_die_and_children, et
832 al. which are used for both .debug_info and .debug_types dies.
833 All parameters here are unchanging for the life of the call. This
834 struct exists to abstract away the constant parameters of die reading. */
836 struct die_reader_specs
838 /* die_section->asection->owner. */
841 /* The CU of the DIE we are parsing. */
842 struct dwarf2_cu *cu;
844 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
845 struct dwo_file *dwo_file;
847 /* The section the die comes from.
848 This is either .debug_info or .debug_types, or the .dwo variants. */
849 struct dwarf2_section_info *die_section;
851 /* die_section->buffer. */
854 /* The end of the buffer. */
855 const gdb_byte *buffer_end;
858 /* Type of function passed to init_cutu_and_read_dies, et.al. */
859 typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader,
861 struct die_info *comp_unit_die,
865 /* The line number information for a compilation unit (found in the
866 .debug_line section) begins with a "statement program header",
867 which contains the following information. */
870 unsigned int total_length;
871 unsigned short version;
872 unsigned int header_length;
873 unsigned char minimum_instruction_length;
874 unsigned char maximum_ops_per_instruction;
875 unsigned char default_is_stmt;
877 unsigned char line_range;
878 unsigned char opcode_base;
880 /* standard_opcode_lengths[i] is the number of operands for the
881 standard opcode whose value is i. This means that
882 standard_opcode_lengths[0] is unused, and the last meaningful
883 element is standard_opcode_lengths[opcode_base - 1]. */
884 unsigned char *standard_opcode_lengths;
886 /* The include_directories table. NOTE! These strings are not
887 allocated with xmalloc; instead, they are pointers into
888 debug_line_buffer. If you try to free them, `free' will get
890 unsigned int num_include_dirs, include_dirs_size;
893 /* The file_names table. NOTE! These strings are not allocated
894 with xmalloc; instead, they are pointers into debug_line_buffer.
895 Don't try to free them directly. */
896 unsigned int num_file_names, file_names_size;
900 unsigned int dir_index;
901 unsigned int mod_time;
903 int included_p; /* Non-zero if referenced by the Line Number Program. */
904 struct symtab *symtab; /* The associated symbol table, if any. */
907 /* The start and end of the statement program following this
908 header. These point into dwarf2_per_objfile->line_buffer. */
909 gdb_byte *statement_program_start, *statement_program_end;
912 /* When we construct a partial symbol table entry we only
913 need this much information. */
914 struct partial_die_info
916 /* Offset of this DIE. */
919 /* DWARF-2 tag for this DIE. */
920 ENUM_BITFIELD(dwarf_tag) tag : 16;
922 /* Assorted flags describing the data found in this DIE. */
923 unsigned int has_children : 1;
924 unsigned int is_external : 1;
925 unsigned int is_declaration : 1;
926 unsigned int has_type : 1;
927 unsigned int has_specification : 1;
928 unsigned int has_pc_info : 1;
929 unsigned int may_be_inlined : 1;
931 /* Flag set if the SCOPE field of this structure has been
933 unsigned int scope_set : 1;
935 /* Flag set if the DIE has a byte_size attribute. */
936 unsigned int has_byte_size : 1;
938 /* Flag set if any of the DIE's children are template arguments. */
939 unsigned int has_template_arguments : 1;
941 /* Flag set if fixup_partial_die has been called on this die. */
942 unsigned int fixup_called : 1;
944 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
945 unsigned int is_dwz : 1;
947 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
948 unsigned int spec_is_dwz : 1;
950 /* The name of this DIE. Normally the value of DW_AT_name, but
951 sometimes a default name for unnamed DIEs. */
954 /* The linkage name, if present. */
955 const char *linkage_name;
957 /* The scope to prepend to our children. This is generally
958 allocated on the comp_unit_obstack, so will disappear
959 when this compilation unit leaves the cache. */
962 /* Some data associated with the partial DIE. The tag determines
963 which field is live. */
966 /* The location description associated with this DIE, if any. */
967 struct dwarf_block *locdesc;
968 /* The offset of an import, for DW_TAG_imported_unit. */
972 /* If HAS_PC_INFO, the PC range associated with this DIE. */
976 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
977 DW_AT_sibling, if any. */
978 /* NOTE: This member isn't strictly necessary, read_partial_die could
979 return DW_AT_sibling values to its caller load_partial_dies. */
982 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
983 DW_AT_specification (or DW_AT_abstract_origin or
985 sect_offset spec_offset;
987 /* Pointers to this DIE's parent, first child, and next sibling,
989 struct partial_die_info *die_parent, *die_child, *die_sibling;
992 /* This data structure holds the information of an abbrev. */
995 unsigned int number; /* number identifying abbrev */
996 enum dwarf_tag tag; /* dwarf tag */
997 unsigned short has_children; /* boolean */
998 unsigned short num_attrs; /* number of attributes */
999 struct attr_abbrev *attrs; /* an array of attribute descriptions */
1000 struct abbrev_info *next; /* next in chain */
1005 ENUM_BITFIELD(dwarf_attribute) name : 16;
1006 ENUM_BITFIELD(dwarf_form) form : 16;
1009 /* Size of abbrev_table.abbrev_hash_table. */
1010 #define ABBREV_HASH_SIZE 121
1012 /* Top level data structure to contain an abbreviation table. */
1016 /* Where the abbrev table came from.
1017 This is used as a sanity check when the table is used. */
1020 /* Storage for the abbrev table. */
1021 struct obstack abbrev_obstack;
1023 /* Hash table of abbrevs.
1024 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1025 It could be statically allocated, but the previous code didn't so we
1027 struct abbrev_info **abbrevs;
1030 /* Attributes have a name and a value. */
1033 ENUM_BITFIELD(dwarf_attribute) name : 16;
1034 ENUM_BITFIELD(dwarf_form) form : 15;
1036 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1037 field should be in u.str (existing only for DW_STRING) but it is kept
1038 here for better struct attribute alignment. */
1039 unsigned int string_is_canonical : 1;
1044 struct dwarf_block *blk;
1048 struct signatured_type *signatured_type;
1053 /* This data structure holds a complete die structure. */
1056 /* DWARF-2 tag for this DIE. */
1057 ENUM_BITFIELD(dwarf_tag) tag : 16;
1059 /* Number of attributes */
1060 unsigned char num_attrs;
1062 /* True if we're presently building the full type name for the
1063 type derived from this DIE. */
1064 unsigned char building_fullname : 1;
1067 unsigned int abbrev;
1069 /* Offset in .debug_info or .debug_types section. */
1072 /* The dies in a compilation unit form an n-ary tree. PARENT
1073 points to this die's parent; CHILD points to the first child of
1074 this node; and all the children of a given node are chained
1075 together via their SIBLING fields. */
1076 struct die_info *child; /* Its first child, if any. */
1077 struct die_info *sibling; /* Its next sibling, if any. */
1078 struct die_info *parent; /* Its parent, if any. */
1080 /* An array of attributes, with NUM_ATTRS elements. There may be
1081 zero, but it's not common and zero-sized arrays are not
1082 sufficiently portable C. */
1083 struct attribute attrs[1];
1086 /* Get at parts of an attribute structure. */
1088 #define DW_STRING(attr) ((attr)->u.str)
1089 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1090 #define DW_UNSND(attr) ((attr)->u.unsnd)
1091 #define DW_BLOCK(attr) ((attr)->u.blk)
1092 #define DW_SND(attr) ((attr)->u.snd)
1093 #define DW_ADDR(attr) ((attr)->u.addr)
1094 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
1096 /* Blocks are a bunch of untyped bytes. */
1101 /* Valid only if SIZE is not zero. */
1105 #ifndef ATTR_ALLOC_CHUNK
1106 #define ATTR_ALLOC_CHUNK 4
1109 /* Allocate fields for structs, unions and enums in this size. */
1110 #ifndef DW_FIELD_ALLOC_CHUNK
1111 #define DW_FIELD_ALLOC_CHUNK 4
1114 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1115 but this would require a corresponding change in unpack_field_as_long
1117 static int bits_per_byte = 8;
1119 /* The routines that read and process dies for a C struct or C++ class
1120 pass lists of data member fields and lists of member function fields
1121 in an instance of a field_info structure, as defined below. */
1124 /* List of data member and baseclasses fields. */
1127 struct nextfield *next;
1132 *fields, *baseclasses;
1134 /* Number of fields (including baseclasses). */
1137 /* Number of baseclasses. */
1140 /* Set if the accesibility of one of the fields is not public. */
1141 int non_public_fields;
1143 /* Member function fields array, entries are allocated in the order they
1144 are encountered in the object file. */
1147 struct nextfnfield *next;
1148 struct fn_field fnfield;
1152 /* Member function fieldlist array, contains name of possibly overloaded
1153 member function, number of overloaded member functions and a pointer
1154 to the head of the member function field chain. */
1159 struct nextfnfield *head;
1163 /* Number of entries in the fnfieldlists array. */
1166 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1167 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1168 struct typedef_field_list
1170 struct typedef_field field;
1171 struct typedef_field_list *next;
1173 *typedef_field_list;
1174 unsigned typedef_field_list_count;
1177 /* One item on the queue of compilation units to read in full symbols
1179 struct dwarf2_queue_item
1181 struct dwarf2_per_cu_data *per_cu;
1182 enum language pretend_language;
1183 struct dwarf2_queue_item *next;
1186 /* The current queue. */
1187 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
1189 /* Loaded secondary compilation units are kept in memory until they
1190 have not been referenced for the processing of this many
1191 compilation units. Set this to zero to disable caching. Cache
1192 sizes of up to at least twenty will improve startup time for
1193 typical inter-CU-reference binaries, at an obvious memory cost. */
1194 static int dwarf2_max_cache_age = 5;
1196 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
1197 struct cmd_list_element *c, const char *value)
1199 fprintf_filtered (file, _("The upper bound on the age of cached "
1200 "dwarf2 compilation units is %s.\n"),
1205 /* Various complaints about symbol reading that don't abort the process. */
1208 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1210 complaint (&symfile_complaints,
1211 _("statement list doesn't fit in .debug_line section"));
1215 dwarf2_debug_line_missing_file_complaint (void)
1217 complaint (&symfile_complaints,
1218 _(".debug_line section has line data without a file"));
1222 dwarf2_debug_line_missing_end_sequence_complaint (void)
1224 complaint (&symfile_complaints,
1225 _(".debug_line section has line "
1226 "program sequence without an end"));
1230 dwarf2_complex_location_expr_complaint (void)
1232 complaint (&symfile_complaints, _("location expression too complex"));
1236 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
1239 complaint (&symfile_complaints,
1240 _("const value length mismatch for '%s', got %d, expected %d"),
1245 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
1247 complaint (&symfile_complaints,
1248 _("debug info runs off end of %s section"
1250 section->asection->name,
1251 bfd_get_filename (section->asection->owner));
1255 dwarf2_macro_malformed_definition_complaint (const char *arg1)
1257 complaint (&symfile_complaints,
1258 _("macro debug info contains a "
1259 "malformed macro definition:\n`%s'"),
1264 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
1266 complaint (&symfile_complaints,
1267 _("invalid attribute class or form for '%s' in '%s'"),
1271 /* local function prototypes */
1273 static void dwarf2_locate_sections (bfd *, asection *, void *);
1275 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
1278 static void dwarf2_find_base_address (struct die_info *die,
1279 struct dwarf2_cu *cu);
1281 static struct partial_symtab *create_partial_symtab
1282 (struct dwarf2_per_cu_data *per_cu, const char *name);
1284 static void dwarf2_build_psymtabs_hard (struct objfile *);
1286 static void scan_partial_symbols (struct partial_die_info *,
1287 CORE_ADDR *, CORE_ADDR *,
1288 int, struct dwarf2_cu *);
1290 static void add_partial_symbol (struct partial_die_info *,
1291 struct dwarf2_cu *);
1293 static void add_partial_namespace (struct partial_die_info *pdi,
1294 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1295 int need_pc, struct dwarf2_cu *cu);
1297 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
1298 CORE_ADDR *highpc, int need_pc,
1299 struct dwarf2_cu *cu);
1301 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
1302 struct dwarf2_cu *cu);
1304 static void add_partial_subprogram (struct partial_die_info *pdi,
1305 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1306 int need_pc, struct dwarf2_cu *cu);
1308 static void dwarf2_read_symtab (struct partial_symtab *,
1311 static void psymtab_to_symtab_1 (struct partial_symtab *);
1313 static struct abbrev_info *abbrev_table_lookup_abbrev
1314 (const struct abbrev_table *, unsigned int);
1316 static struct abbrev_table *abbrev_table_read_table
1317 (struct dwarf2_section_info *, sect_offset);
1319 static void abbrev_table_free (struct abbrev_table *);
1321 static void abbrev_table_free_cleanup (void *);
1323 static void dwarf2_read_abbrevs (struct dwarf2_cu *,
1324 struct dwarf2_section_info *);
1326 static void dwarf2_free_abbrev_table (void *);
1328 static unsigned int peek_abbrev_code (bfd *, gdb_byte *);
1330 static struct partial_die_info *load_partial_dies
1331 (const struct die_reader_specs *, gdb_byte *, int);
1333 static gdb_byte *read_partial_die (const struct die_reader_specs *,
1334 struct partial_die_info *,
1335 struct abbrev_info *,
1339 static struct partial_die_info *find_partial_die (sect_offset, int,
1340 struct dwarf2_cu *);
1342 static void fixup_partial_die (struct partial_die_info *,
1343 struct dwarf2_cu *);
1345 static gdb_byte *read_attribute (const struct die_reader_specs *,
1346 struct attribute *, struct attr_abbrev *,
1349 static unsigned int read_1_byte (bfd *, const gdb_byte *);
1351 static int read_1_signed_byte (bfd *, const gdb_byte *);
1353 static unsigned int read_2_bytes (bfd *, const gdb_byte *);
1355 static unsigned int read_4_bytes (bfd *, const gdb_byte *);
1357 static ULONGEST read_8_bytes (bfd *, const gdb_byte *);
1359 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
1362 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
1364 static LONGEST read_checked_initial_length_and_offset
1365 (bfd *, gdb_byte *, const struct comp_unit_head *,
1366 unsigned int *, unsigned int *);
1368 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
1371 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
1373 static sect_offset read_abbrev_offset (struct dwarf2_section_info *,
1376 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
1378 static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
1380 static char *read_indirect_string (bfd *, gdb_byte *,
1381 const struct comp_unit_head *,
1384 static char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST);
1386 static ULONGEST read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
1388 static LONGEST read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
1390 static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, gdb_byte *,
1393 static char *read_str_index (const struct die_reader_specs *reader,
1394 struct dwarf2_cu *cu, ULONGEST str_index);
1396 static void set_cu_language (unsigned int, struct dwarf2_cu *);
1398 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
1399 struct dwarf2_cu *);
1401 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
1404 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
1405 struct dwarf2_cu *cu);
1407 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
1409 static struct die_info *die_specification (struct die_info *die,
1410 struct dwarf2_cu **);
1412 static void free_line_header (struct line_header *lh);
1414 static void add_file_name (struct line_header *, char *, unsigned int,
1415 unsigned int, unsigned int);
1417 static struct line_header *dwarf_decode_line_header (unsigned int offset,
1418 struct dwarf2_cu *cu);
1420 static void dwarf_decode_lines (struct line_header *, const char *,
1421 struct dwarf2_cu *, struct partial_symtab *,
1424 static void dwarf2_start_subfile (char *, const char *, const char *);
1426 static void dwarf2_start_symtab (struct dwarf2_cu *,
1427 const char *, const char *, CORE_ADDR);
1429 static struct symbol *new_symbol (struct die_info *, struct type *,
1430 struct dwarf2_cu *);
1432 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1433 struct dwarf2_cu *, struct symbol *);
1435 static void dwarf2_const_value (struct attribute *, struct symbol *,
1436 struct dwarf2_cu *);
1438 static void dwarf2_const_value_attr (struct attribute *attr,
1441 struct obstack *obstack,
1442 struct dwarf2_cu *cu, LONGEST *value,
1444 struct dwarf2_locexpr_baton **baton);
1446 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1448 static int need_gnat_info (struct dwarf2_cu *);
1450 static struct type *die_descriptive_type (struct die_info *,
1451 struct dwarf2_cu *);
1453 static void set_descriptive_type (struct type *, struct die_info *,
1454 struct dwarf2_cu *);
1456 static struct type *die_containing_type (struct die_info *,
1457 struct dwarf2_cu *);
1459 static struct type *lookup_die_type (struct die_info *, struct attribute *,
1460 struct dwarf2_cu *);
1462 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1464 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1466 static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1468 static char *typename_concat (struct obstack *obs, const char *prefix,
1469 const char *suffix, int physname,
1470 struct dwarf2_cu *cu);
1472 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1474 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1476 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1478 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1480 static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu);
1482 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1483 struct dwarf2_cu *, struct partial_symtab *);
1485 static int dwarf2_get_pc_bounds (struct die_info *,
1486 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1487 struct partial_symtab *);
1489 static void get_scope_pc_bounds (struct die_info *,
1490 CORE_ADDR *, CORE_ADDR *,
1491 struct dwarf2_cu *);
1493 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1494 CORE_ADDR, struct dwarf2_cu *);
1496 static void dwarf2_add_field (struct field_info *, struct die_info *,
1497 struct dwarf2_cu *);
1499 static void dwarf2_attach_fields_to_type (struct field_info *,
1500 struct type *, struct dwarf2_cu *);
1502 static void dwarf2_add_member_fn (struct field_info *,
1503 struct die_info *, struct type *,
1504 struct dwarf2_cu *);
1506 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1508 struct dwarf2_cu *);
1510 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1512 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1514 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1516 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1518 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1520 static struct type *read_module_type (struct die_info *die,
1521 struct dwarf2_cu *cu);
1523 static const char *namespace_name (struct die_info *die,
1524 int *is_anonymous, struct dwarf2_cu *);
1526 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1528 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1530 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1531 struct dwarf2_cu *);
1533 static struct die_info *read_die_and_children (const struct die_reader_specs *,
1535 gdb_byte **new_info_ptr,
1536 struct die_info *parent);
1538 static struct die_info *read_die_and_siblings (const struct die_reader_specs *,
1540 gdb_byte **new_info_ptr,
1541 struct die_info *parent);
1543 static gdb_byte *read_full_die_1 (const struct die_reader_specs *,
1544 struct die_info **, gdb_byte *, int *, int);
1546 static gdb_byte *read_full_die (const struct die_reader_specs *,
1547 struct die_info **, gdb_byte *, int *);
1549 static void process_die (struct die_info *, struct dwarf2_cu *);
1551 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *,
1554 static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1556 static const char *dwarf2_full_name (const char *name,
1557 struct die_info *die,
1558 struct dwarf2_cu *cu);
1560 static const char *dwarf2_physname (const char *name, struct die_info *die,
1561 struct dwarf2_cu *cu);
1563 static struct die_info *dwarf2_extension (struct die_info *die,
1564 struct dwarf2_cu **);
1566 static const char *dwarf_tag_name (unsigned int);
1568 static const char *dwarf_attr_name (unsigned int);
1570 static const char *dwarf_form_name (unsigned int);
1572 static char *dwarf_bool_name (unsigned int);
1574 static const char *dwarf_type_encoding_name (unsigned int);
1576 static struct die_info *sibling_die (struct die_info *);
1578 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1580 static void dump_die_for_error (struct die_info *);
1582 static void dump_die_1 (struct ui_file *, int level, int max_level,
1585 /*static*/ void dump_die (struct die_info *, int max_level);
1587 static void store_in_ref_table (struct die_info *,
1588 struct dwarf2_cu *);
1590 static int is_ref_attr (struct attribute *);
1592 static sect_offset dwarf2_get_ref_die_offset (struct attribute *);
1594 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1596 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1598 struct dwarf2_cu **);
1600 static struct die_info *follow_die_ref (struct die_info *,
1602 struct dwarf2_cu **);
1604 static struct die_info *follow_die_sig (struct die_info *,
1606 struct dwarf2_cu **);
1608 static struct signatured_type *lookup_signatured_type_at_offset
1609 (struct objfile *objfile,
1610 struct dwarf2_section_info *section, sect_offset offset);
1612 static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu);
1614 static void read_signatured_type (struct signatured_type *);
1616 static struct type_unit_group *get_type_unit_group
1617 (struct dwarf2_cu *, struct attribute *);
1619 static void build_type_unit_groups (die_reader_func_ftype *, void *);
1621 /* memory allocation interface */
1623 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1625 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1627 static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int,
1630 static int attr_form_is_block (struct attribute *);
1632 static int attr_form_is_section_offset (struct attribute *);
1634 static int attr_form_is_constant (struct attribute *);
1636 static void fill_in_loclist_baton (struct dwarf2_cu *cu,
1637 struct dwarf2_loclist_baton *baton,
1638 struct attribute *attr);
1640 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1642 struct dwarf2_cu *cu,
1645 static gdb_byte *skip_one_die (const struct die_reader_specs *reader,
1647 struct abbrev_info *abbrev);
1649 static void free_stack_comp_unit (void *);
1651 static hashval_t partial_die_hash (const void *item);
1653 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1655 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1656 (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile);
1658 static void init_one_comp_unit (struct dwarf2_cu *cu,
1659 struct dwarf2_per_cu_data *per_cu);
1661 static void prepare_one_comp_unit (struct dwarf2_cu *cu,
1662 struct die_info *comp_unit_die,
1663 enum language pretend_language);
1665 static void free_heap_comp_unit (void *);
1667 static void free_cached_comp_units (void *);
1669 static void age_cached_comp_units (void);
1671 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *);
1673 static struct type *set_die_type (struct die_info *, struct type *,
1674 struct dwarf2_cu *);
1676 static void create_all_comp_units (struct objfile *);
1678 static int create_all_type_units (struct objfile *);
1680 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1683 static void process_full_comp_unit (struct dwarf2_per_cu_data *,
1686 static void process_full_type_unit (struct dwarf2_per_cu_data *,
1689 static void dwarf2_add_dependence (struct dwarf2_cu *,
1690 struct dwarf2_per_cu_data *);
1692 static void dwarf2_mark (struct dwarf2_cu *);
1694 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1696 static struct type *get_die_type_at_offset (sect_offset,
1697 struct dwarf2_per_cu_data *per_cu);
1699 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1701 static void dwarf2_release_queue (void *dummy);
1703 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1704 enum language pretend_language);
1706 static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
1707 struct dwarf2_per_cu_data *per_cu,
1708 enum language pretend_language);
1710 static void process_queue (void);
1712 static void find_file_and_directory (struct die_info *die,
1713 struct dwarf2_cu *cu,
1714 const char **name, const char **comp_dir);
1716 static char *file_full_name (int file, struct line_header *lh,
1717 const char *comp_dir);
1719 static gdb_byte *read_and_check_comp_unit_head
1720 (struct comp_unit_head *header,
1721 struct dwarf2_section_info *section,
1722 struct dwarf2_section_info *abbrev_section, gdb_byte *info_ptr,
1723 int is_debug_types_section);
1725 static void init_cutu_and_read_dies
1726 (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table,
1727 int use_existing_cu, int keep,
1728 die_reader_func_ftype *die_reader_func, void *data);
1730 static void init_cutu_and_read_dies_simple
1731 (struct dwarf2_per_cu_data *this_cu,
1732 die_reader_func_ftype *die_reader_func, void *data);
1734 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1736 static htab_t allocate_dwo_unit_table (struct objfile *objfile);
1738 static struct dwo_unit *lookup_dwo_comp_unit
1739 (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST);
1741 static struct dwo_unit *lookup_dwo_type_unit
1742 (struct signatured_type *, const char *, const char *);
1744 static void free_dwo_file_cleanup (void *);
1746 static void process_cu_includes (void);
1748 static void check_producer (struct dwarf2_cu *cu);
1752 /* Convert VALUE between big- and little-endian. */
1754 byte_swap (offset_type value)
1758 result = (value & 0xff) << 24;
1759 result |= (value & 0xff00) << 8;
1760 result |= (value & 0xff0000) >> 8;
1761 result |= (value & 0xff000000) >> 24;
1765 #define MAYBE_SWAP(V) byte_swap (V)
1768 #define MAYBE_SWAP(V) (V)
1769 #endif /* WORDS_BIGENDIAN */
1771 /* The suffix for an index file. */
1772 #define INDEX_SUFFIX ".gdb-index"
1774 /* Try to locate the sections we need for DWARF 2 debugging
1775 information and return true if we have enough to do something.
1776 NAMES points to the dwarf2 section names, or is NULL if the standard
1777 ELF names are used. */
1780 dwarf2_has_info (struct objfile *objfile,
1781 const struct dwarf2_debug_sections *names)
1783 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1784 if (!dwarf2_per_objfile)
1786 /* Initialize per-objfile state. */
1787 struct dwarf2_per_objfile *data
1788 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1790 memset (data, 0, sizeof (*data));
1791 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1792 dwarf2_per_objfile = data;
1794 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections,
1796 dwarf2_per_objfile->objfile = objfile;
1798 return (dwarf2_per_objfile->info.asection != NULL
1799 && dwarf2_per_objfile->abbrev.asection != NULL);
1802 /* When loading sections, we look either for uncompressed section or for
1803 compressed section names. */
1806 section_is_p (const char *section_name,
1807 const struct dwarf2_section_names *names)
1809 if (names->normal != NULL
1810 && strcmp (section_name, names->normal) == 0)
1812 if (names->compressed != NULL
1813 && strcmp (section_name, names->compressed) == 0)
1818 /* This function is mapped across the sections and remembers the
1819 offset and size of each of the debugging sections we are interested
1823 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames)
1825 const struct dwarf2_debug_sections *names;
1826 flagword aflag = bfd_get_section_flags (abfd, sectp);
1829 names = &dwarf2_elf_names;
1831 names = (const struct dwarf2_debug_sections *) vnames;
1833 if ((aflag & SEC_HAS_CONTENTS) == 0)
1836 else if (section_is_p (sectp->name, &names->info))
1838 dwarf2_per_objfile->info.asection = sectp;
1839 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1841 else if (section_is_p (sectp->name, &names->abbrev))
1843 dwarf2_per_objfile->abbrev.asection = sectp;
1844 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1846 else if (section_is_p (sectp->name, &names->line))
1848 dwarf2_per_objfile->line.asection = sectp;
1849 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1851 else if (section_is_p (sectp->name, &names->loc))
1853 dwarf2_per_objfile->loc.asection = sectp;
1854 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1856 else if (section_is_p (sectp->name, &names->macinfo))
1858 dwarf2_per_objfile->macinfo.asection = sectp;
1859 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1861 else if (section_is_p (sectp->name, &names->macro))
1863 dwarf2_per_objfile->macro.asection = sectp;
1864 dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp);
1866 else if (section_is_p (sectp->name, &names->str))
1868 dwarf2_per_objfile->str.asection = sectp;
1869 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1871 else if (section_is_p (sectp->name, &names->addr))
1873 dwarf2_per_objfile->addr.asection = sectp;
1874 dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp);
1876 else if (section_is_p (sectp->name, &names->frame))
1878 dwarf2_per_objfile->frame.asection = sectp;
1879 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1881 else if (section_is_p (sectp->name, &names->eh_frame))
1883 dwarf2_per_objfile->eh_frame.asection = sectp;
1884 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1886 else if (section_is_p (sectp->name, &names->ranges))
1888 dwarf2_per_objfile->ranges.asection = sectp;
1889 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1891 else if (section_is_p (sectp->name, &names->types))
1893 struct dwarf2_section_info type_section;
1895 memset (&type_section, 0, sizeof (type_section));
1896 type_section.asection = sectp;
1897 type_section.size = bfd_get_section_size (sectp);
1899 VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types,
1902 else if (section_is_p (sectp->name, &names->gdb_index))
1904 dwarf2_per_objfile->gdb_index.asection = sectp;
1905 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1908 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1909 && bfd_section_vma (abfd, sectp) == 0)
1910 dwarf2_per_objfile->has_section_at_zero = 1;
1913 /* A helper function that decides whether a section is empty,
1917 dwarf2_section_empty_p (struct dwarf2_section_info *info)
1919 return info->asection == NULL || info->size == 0;
1922 /* Read the contents of the section INFO.
1923 OBJFILE is the main object file, but not necessarily the file where
1924 the section comes from. E.g., for DWO files INFO->asection->owner
1925 is the bfd of the DWO file.
1926 If the section is compressed, uncompress it before returning. */
1929 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1931 asection *sectp = info->asection;
1933 gdb_byte *buf, *retbuf;
1934 unsigned char header[4];
1938 info->buffer = NULL;
1941 if (dwarf2_section_empty_p (info))
1944 abfd = sectp->owner;
1946 /* If the section has relocations, we must read it ourselves.
1947 Otherwise we attach it to the BFD. */
1948 if ((sectp->flags & SEC_RELOC) == 0)
1950 const gdb_byte *bytes = gdb_bfd_map_section (sectp, &info->size);
1952 /* We have to cast away const here for historical reasons.
1953 Fixing dwarf2read to be const-correct would be quite nice. */
1954 info->buffer = (gdb_byte *) bytes;
1958 buf = obstack_alloc (&objfile->objfile_obstack, info->size);
1961 /* When debugging .o files, we may need to apply relocations; see
1962 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1963 We never compress sections in .o files, so we only need to
1964 try this when the section is not compressed. */
1965 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1968 info->buffer = retbuf;
1972 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1973 || bfd_bread (buf, info->size, abfd) != info->size)
1974 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1975 bfd_get_filename (abfd));
1978 /* A helper function that returns the size of a section in a safe way.
1979 If you are positive that the section has been read before using the
1980 size, then it is safe to refer to the dwarf2_section_info object's
1981 "size" field directly. In other cases, you must call this
1982 function, because for compressed sections the size field is not set
1983 correctly until the section has been read. */
1985 static bfd_size_type
1986 dwarf2_section_size (struct objfile *objfile,
1987 struct dwarf2_section_info *info)
1990 dwarf2_read_section (objfile, info);
1994 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1998 dwarf2_get_section_info (struct objfile *objfile,
1999 enum dwarf2_section_enum sect,
2000 asection **sectp, gdb_byte **bufp,
2001 bfd_size_type *sizep)
2003 struct dwarf2_per_objfile *data
2004 = objfile_data (objfile, dwarf2_objfile_data_key);
2005 struct dwarf2_section_info *info;
2007 /* We may see an objfile without any DWARF, in which case we just
2018 case DWARF2_DEBUG_FRAME:
2019 info = &data->frame;
2021 case DWARF2_EH_FRAME:
2022 info = &data->eh_frame;
2025 gdb_assert_not_reached ("unexpected section");
2028 dwarf2_read_section (objfile, info);
2030 *sectp = info->asection;
2031 *bufp = info->buffer;
2032 *sizep = info->size;
2035 /* A helper function to find the sections for a .dwz file. */
2038 locate_dwz_sections (bfd *abfd, asection *sectp, void *arg)
2040 struct dwz_file *dwz_file = arg;
2042 /* Note that we only support the standard ELF names, because .dwz
2043 is ELF-only (at the time of writing). */
2044 if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev))
2046 dwz_file->abbrev.asection = sectp;
2047 dwz_file->abbrev.size = bfd_get_section_size (sectp);
2049 else if (section_is_p (sectp->name, &dwarf2_elf_names.info))
2051 dwz_file->info.asection = sectp;
2052 dwz_file->info.size = bfd_get_section_size (sectp);
2054 else if (section_is_p (sectp->name, &dwarf2_elf_names.str))
2056 dwz_file->str.asection = sectp;
2057 dwz_file->str.size = bfd_get_section_size (sectp);
2059 else if (section_is_p (sectp->name, &dwarf2_elf_names.line))
2061 dwz_file->line.asection = sectp;
2062 dwz_file->line.size = bfd_get_section_size (sectp);
2064 else if (section_is_p (sectp->name, &dwarf2_elf_names.macro))
2066 dwz_file->macro.asection = sectp;
2067 dwz_file->macro.size = bfd_get_section_size (sectp);
2069 else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index))
2071 dwz_file->gdb_index.asection = sectp;
2072 dwz_file->gdb_index.size = bfd_get_section_size (sectp);
2076 /* Open the separate '.dwz' debug file, if needed. Error if the file
2079 static struct dwz_file *
2080 dwarf2_get_dwz_file (void)
2082 bfd *abfd, *dwz_bfd;
2085 struct cleanup *cleanup;
2086 const char *filename;
2087 struct dwz_file *result;
2089 if (dwarf2_per_objfile->dwz_file != NULL)
2090 return dwarf2_per_objfile->dwz_file;
2092 abfd = dwarf2_per_objfile->objfile->obfd;
2093 section = bfd_get_section_by_name (abfd, ".gnu_debugaltlink");
2094 if (section == NULL)
2095 error (_("could not find '.gnu_debugaltlink' section"));
2096 if (!bfd_malloc_and_get_section (abfd, section, &data))
2097 error (_("could not read '.gnu_debugaltlink' section: %s"),
2098 bfd_errmsg (bfd_get_error ()));
2099 cleanup = make_cleanup (xfree, data);
2102 if (!IS_ABSOLUTE_PATH (filename))
2104 char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name);
2107 make_cleanup (xfree, abs);
2108 abs = ldirname (abs);
2109 make_cleanup (xfree, abs);
2111 rel = concat (abs, SLASH_STRING, filename, (char *) NULL);
2112 make_cleanup (xfree, rel);
2116 /* The format is just a NUL-terminated file name, followed by the
2117 build-id. For now, though, we ignore the build-id. */
2118 dwz_bfd = gdb_bfd_open (filename, gnutarget, -1);
2119 if (dwz_bfd == NULL)
2120 error (_("could not read '%s': %s"), filename,
2121 bfd_errmsg (bfd_get_error ()));
2123 if (!bfd_check_format (dwz_bfd, bfd_object))
2125 gdb_bfd_unref (dwz_bfd);
2126 error (_("file '%s' was not usable: %s"), filename,
2127 bfd_errmsg (bfd_get_error ()));
2130 result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack,
2132 result->dwz_bfd = dwz_bfd;
2134 bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result);
2136 do_cleanups (cleanup);
2138 dwarf2_per_objfile->dwz_file = result;
2142 /* DWARF quick_symbols_functions support. */
2144 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2145 unique line tables, so we maintain a separate table of all .debug_line
2146 derived entries to support the sharing.
2147 All the quick functions need is the list of file names. We discard the
2148 line_header when we're done and don't need to record it here. */
2149 struct quick_file_names
2151 /* The data used to construct the hash key. */
2152 struct stmt_list_hash hash;
2154 /* The number of entries in file_names, real_names. */
2155 unsigned int num_file_names;
2157 /* The file names from the line table, after being run through
2159 const char **file_names;
2161 /* The file names from the line table after being run through
2162 gdb_realpath. These are computed lazily. */
2163 const char **real_names;
2166 /* When using the index (and thus not using psymtabs), each CU has an
2167 object of this type. This is used to hold information needed by
2168 the various "quick" methods. */
2169 struct dwarf2_per_cu_quick_data
2171 /* The file table. This can be NULL if there was no file table
2172 or it's currently not read in.
2173 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2174 struct quick_file_names *file_names;
2176 /* The corresponding symbol table. This is NULL if symbols for this
2177 CU have not yet been read. */
2178 struct symtab *symtab;
2180 /* A temporary mark bit used when iterating over all CUs in
2181 expand_symtabs_matching. */
2182 unsigned int mark : 1;
2184 /* True if we've tried to read the file table and found there isn't one.
2185 There will be no point in trying to read it again next time. */
2186 unsigned int no_file_data : 1;
2189 /* Utility hash function for a stmt_list_hash. */
2192 hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash)
2196 if (stmt_list_hash->dwo_unit != NULL)
2197 v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file;
2198 v += stmt_list_hash->line_offset.sect_off;
2202 /* Utility equality function for a stmt_list_hash. */
2205 eq_stmt_list_entry (const struct stmt_list_hash *lhs,
2206 const struct stmt_list_hash *rhs)
2208 if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL))
2210 if (lhs->dwo_unit != NULL
2211 && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file)
2214 return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
2217 /* Hash function for a quick_file_names. */
2220 hash_file_name_entry (const void *e)
2222 const struct quick_file_names *file_data = e;
2224 return hash_stmt_list_entry (&file_data->hash);
2227 /* Equality function for a quick_file_names. */
2230 eq_file_name_entry (const void *a, const void *b)
2232 const struct quick_file_names *ea = a;
2233 const struct quick_file_names *eb = b;
2235 return eq_stmt_list_entry (&ea->hash, &eb->hash);
2238 /* Delete function for a quick_file_names. */
2241 delete_file_name_entry (void *e)
2243 struct quick_file_names *file_data = e;
2246 for (i = 0; i < file_data->num_file_names; ++i)
2248 xfree ((void*) file_data->file_names[i]);
2249 if (file_data->real_names)
2250 xfree ((void*) file_data->real_names[i]);
2253 /* The space for the struct itself lives on objfile_obstack,
2254 so we don't free it here. */
2257 /* Create a quick_file_names hash table. */
2260 create_quick_file_names_table (unsigned int nr_initial_entries)
2262 return htab_create_alloc (nr_initial_entries,
2263 hash_file_name_entry, eq_file_name_entry,
2264 delete_file_name_entry, xcalloc, xfree);
2267 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2268 have to be created afterwards. You should call age_cached_comp_units after
2269 processing PER_CU->CU. dw2_setup must have been already called. */
2272 load_cu (struct dwarf2_per_cu_data *per_cu)
2274 if (per_cu->is_debug_types)
2275 load_full_type_unit (per_cu);
2277 load_full_comp_unit (per_cu, language_minimal);
2279 gdb_assert (per_cu->cu != NULL);
2281 dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu);
2284 /* Read in the symbols for PER_CU. */
2287 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2289 struct cleanup *back_to;
2291 /* Skip type_unit_groups, reading the type units they contain
2292 is handled elsewhere. */
2293 if (IS_TYPE_UNIT_GROUP (per_cu))
2296 back_to = make_cleanup (dwarf2_release_queue, NULL);
2298 if (dwarf2_per_objfile->using_index
2299 ? per_cu->v.quick->symtab == NULL
2300 : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin))
2302 queue_comp_unit (per_cu, language_minimal);
2308 /* Age the cache, releasing compilation units that have not
2309 been used recently. */
2310 age_cached_comp_units ();
2312 do_cleanups (back_to);
2315 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2316 the objfile from which this CU came. Returns the resulting symbol
2319 static struct symtab *
2320 dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2322 gdb_assert (dwarf2_per_objfile->using_index);
2323 if (!per_cu->v.quick->symtab)
2325 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
2326 increment_reading_symtab ();
2327 dw2_do_instantiate_symtab (per_cu);
2328 process_cu_includes ();
2329 do_cleanups (back_to);
2331 return per_cu->v.quick->symtab;
2334 /* Return the CU given its index.
2336 This is intended for loops like:
2338 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2339 + dwarf2_per_objfile->n_type_units); ++i)
2341 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2347 static struct dwarf2_per_cu_data *
2348 dw2_get_cu (int index)
2350 if (index >= dwarf2_per_objfile->n_comp_units)
2352 index -= dwarf2_per_objfile->n_comp_units;
2353 gdb_assert (index < dwarf2_per_objfile->n_type_units);
2354 return &dwarf2_per_objfile->all_type_units[index]->per_cu;
2357 return dwarf2_per_objfile->all_comp_units[index];
2360 /* Return the primary CU given its index.
2361 The difference between this function and dw2_get_cu is in the handling
2362 of type units (TUs). Here we return the type_unit_group object.
2364 This is intended for loops like:
2366 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2367 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2369 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2375 static struct dwarf2_per_cu_data *
2376 dw2_get_primary_cu (int index)
2378 if (index >= dwarf2_per_objfile->n_comp_units)
2380 index -= dwarf2_per_objfile->n_comp_units;
2381 gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups);
2382 return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu;
2385 return dwarf2_per_objfile->all_comp_units[index];
2388 /* A helper for create_cus_from_index that handles a given list of
2392 create_cus_from_index_list (struct objfile *objfile,
2393 const gdb_byte *cu_list, offset_type n_elements,
2394 struct dwarf2_section_info *section,
2400 for (i = 0; i < n_elements; i += 2)
2402 struct dwarf2_per_cu_data *the_cu;
2403 ULONGEST offset, length;
2405 gdb_static_assert (sizeof (ULONGEST) >= 8);
2406 offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE);
2407 length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE);
2410 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2411 struct dwarf2_per_cu_data);
2412 the_cu->offset.sect_off = offset;
2413 the_cu->length = length;
2414 the_cu->objfile = objfile;
2415 the_cu->section = section;
2416 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2417 struct dwarf2_per_cu_quick_data);
2418 the_cu->is_dwz = is_dwz;
2419 dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu;
2423 /* Read the CU list from the mapped index, and use it to create all
2424 the CU objects for this objfile. */
2427 create_cus_from_index (struct objfile *objfile,
2428 const gdb_byte *cu_list, offset_type cu_list_elements,
2429 const gdb_byte *dwz_list, offset_type dwz_elements)
2431 struct dwz_file *dwz;
2433 dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2;
2434 dwarf2_per_objfile->all_comp_units
2435 = obstack_alloc (&objfile->objfile_obstack,
2436 dwarf2_per_objfile->n_comp_units
2437 * sizeof (struct dwarf2_per_cu_data *));
2439 create_cus_from_index_list (objfile, cu_list, cu_list_elements,
2440 &dwarf2_per_objfile->info, 0, 0);
2442 if (dwz_elements == 0)
2445 dwz = dwarf2_get_dwz_file ();
2446 create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1,
2447 cu_list_elements / 2);
2450 /* Create the signatured type hash table from the index. */
2453 create_signatured_type_table_from_index (struct objfile *objfile,
2454 struct dwarf2_section_info *section,
2455 const gdb_byte *bytes,
2456 offset_type elements)
2459 htab_t sig_types_hash;
2461 dwarf2_per_objfile->n_type_units = elements / 3;
2462 dwarf2_per_objfile->all_type_units
2463 = obstack_alloc (&objfile->objfile_obstack,
2464 dwarf2_per_objfile->n_type_units
2465 * sizeof (struct signatured_type *));
2467 sig_types_hash = allocate_signatured_type_table (objfile);
2469 for (i = 0; i < elements; i += 3)
2471 struct signatured_type *sig_type;
2472 ULONGEST offset, type_offset_in_tu, signature;
2475 gdb_static_assert (sizeof (ULONGEST) >= 8);
2476 offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
2477 type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8,
2479 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
2482 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2483 struct signatured_type);
2484 sig_type->signature = signature;
2485 sig_type->type_offset_in_tu.cu_off = type_offset_in_tu;
2486 sig_type->per_cu.is_debug_types = 1;
2487 sig_type->per_cu.section = section;
2488 sig_type->per_cu.offset.sect_off = offset;
2489 sig_type->per_cu.objfile = objfile;
2490 sig_type->per_cu.v.quick
2491 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2492 struct dwarf2_per_cu_quick_data);
2494 slot = htab_find_slot (sig_types_hash, sig_type, INSERT);
2497 dwarf2_per_objfile->all_type_units[i / 3] = sig_type;
2500 dwarf2_per_objfile->signatured_types = sig_types_hash;
2503 /* Read the address map data from the mapped index, and use it to
2504 populate the objfile's psymtabs_addrmap. */
2507 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
2509 const gdb_byte *iter, *end;
2510 struct obstack temp_obstack;
2511 struct addrmap *mutable_map;
2512 struct cleanup *cleanup;
2515 obstack_init (&temp_obstack);
2516 cleanup = make_cleanup_obstack_free (&temp_obstack);
2517 mutable_map = addrmap_create_mutable (&temp_obstack);
2519 iter = index->address_table;
2520 end = iter + index->address_table_size;
2522 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2526 ULONGEST hi, lo, cu_index;
2527 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2529 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2531 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
2534 if (cu_index < dwarf2_per_objfile->n_comp_units)
2536 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
2537 dw2_get_cu (cu_index));
2541 complaint (&symfile_complaints,
2542 _(".gdb_index address table has invalid CU number %u"),
2543 (unsigned) cu_index);
2547 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
2548 &objfile->objfile_obstack);
2549 do_cleanups (cleanup);
2552 /* The hash function for strings in the mapped index. This is the same as
2553 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2554 implementation. This is necessary because the hash function is tied to the
2555 format of the mapped index file. The hash values do not have to match with
2558 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2561 mapped_index_string_hash (int index_version, const void *p)
2563 const unsigned char *str = (const unsigned char *) p;
2567 while ((c = *str++) != 0)
2569 if (index_version >= 5)
2571 r = r * 67 + c - 113;
2577 /* Find a slot in the mapped index INDEX for the object named NAME.
2578 If NAME is found, set *VEC_OUT to point to the CU vector in the
2579 constant pool and return 1. If NAME cannot be found, return 0. */
2582 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
2583 offset_type **vec_out)
2585 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2587 offset_type slot, step;
2588 int (*cmp) (const char *, const char *);
2590 if (current_language->la_language == language_cplus
2591 || current_language->la_language == language_java
2592 || current_language->la_language == language_fortran)
2594 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2596 const char *paren = strchr (name, '(');
2602 dup = xmalloc (paren - name + 1);
2603 memcpy (dup, name, paren - name);
2604 dup[paren - name] = 0;
2606 make_cleanup (xfree, dup);
2611 /* Index version 4 did not support case insensitive searches. But the
2612 indices for case insensitive languages are built in lowercase, therefore
2613 simulate our NAME being searched is also lowercased. */
2614 hash = mapped_index_string_hash ((index->version == 4
2615 && case_sensitivity == case_sensitive_off
2616 ? 5 : index->version),
2619 slot = hash & (index->symbol_table_slots - 1);
2620 step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1;
2621 cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp);
2625 /* Convert a slot number to an offset into the table. */
2626 offset_type i = 2 * slot;
2628 if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0)
2630 do_cleanups (back_to);
2634 str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]);
2635 if (!cmp (name, str))
2637 *vec_out = (offset_type *) (index->constant_pool
2638 + MAYBE_SWAP (index->symbol_table[i + 1]));
2639 do_cleanups (back_to);
2643 slot = (slot + step) & (index->symbol_table_slots - 1);
2647 /* A helper function that reads the .gdb_index from SECTION and fills
2648 in MAP. FILENAME is the name of the file containing the section;
2649 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2650 ok to use deprecated sections.
2652 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2653 out parameters that are filled in with information about the CU and
2654 TU lists in the section.
2656 Returns 1 if all went well, 0 otherwise. */
2659 read_index_from_section (struct objfile *objfile,
2660 const char *filename,
2662 struct dwarf2_section_info *section,
2663 struct mapped_index *map,
2664 const gdb_byte **cu_list,
2665 offset_type *cu_list_elements,
2666 const gdb_byte **types_list,
2667 offset_type *types_list_elements)
2670 offset_type version;
2671 offset_type *metadata;
2674 if (dwarf2_section_empty_p (section))
2677 /* Older elfutils strip versions could keep the section in the main
2678 executable while splitting it for the separate debug info file. */
2679 if ((bfd_get_file_flags (section->asection) & SEC_HAS_CONTENTS) == 0)
2682 dwarf2_read_section (objfile, section);
2684 addr = section->buffer;
2685 /* Version check. */
2686 version = MAYBE_SWAP (*(offset_type *) addr);
2687 /* Versions earlier than 3 emitted every copy of a psymbol. This
2688 causes the index to behave very poorly for certain requests. Version 3
2689 contained incomplete addrmap. So, it seems better to just ignore such
2693 static int warning_printed = 0;
2694 if (!warning_printed)
2696 warning (_("Skipping obsolete .gdb_index section in %s."),
2698 warning_printed = 1;
2702 /* Index version 4 uses a different hash function than index version
2705 Versions earlier than 6 did not emit psymbols for inlined
2706 functions. Using these files will cause GDB not to be able to
2707 set breakpoints on inlined functions by name, so we ignore these
2708 indices unless the user has done
2709 "set use-deprecated-index-sections on". */
2710 if (version < 6 && !deprecated_ok)
2712 static int warning_printed = 0;
2713 if (!warning_printed)
2716 Skipping deprecated .gdb_index section in %s.\n\
2717 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2718 to use the section anyway."),
2720 warning_printed = 1;
2724 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2725 of the TU (for symbols coming from TUs). It's just a performance bug, and
2726 we can't distinguish gdb-generated indices from gold-generated ones, so
2727 nothing to do here. */
2729 /* Indexes with higher version than the one supported by GDB may be no
2730 longer backward compatible. */
2734 map->version = version;
2735 map->total_size = section->size;
2737 metadata = (offset_type *) (addr + sizeof (offset_type));
2740 *cu_list = addr + MAYBE_SWAP (metadata[i]);
2741 *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
2745 *types_list = addr + MAYBE_SWAP (metadata[i]);
2746 *types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
2747 - MAYBE_SWAP (metadata[i]))
2751 map->address_table = addr + MAYBE_SWAP (metadata[i]);
2752 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
2753 - MAYBE_SWAP (metadata[i]));
2756 map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
2757 map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1])
2758 - MAYBE_SWAP (metadata[i]))
2759 / (2 * sizeof (offset_type)));
2762 map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
2768 /* Read the index file. If everything went ok, initialize the "quick"
2769 elements of all the CUs and return 1. Otherwise, return 0. */
2772 dwarf2_read_index (struct objfile *objfile)
2774 struct mapped_index local_map, *map;
2775 const gdb_byte *cu_list, *types_list, *dwz_list = NULL;
2776 offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0;
2778 if (!read_index_from_section (objfile, objfile->name,
2779 use_deprecated_index_sections,
2780 &dwarf2_per_objfile->gdb_index, &local_map,
2781 &cu_list, &cu_list_elements,
2782 &types_list, &types_list_elements))
2785 /* Don't use the index if it's empty. */
2786 if (local_map.symbol_table_slots == 0)
2789 /* If there is a .dwz file, read it so we can get its CU list as
2791 if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL)
2793 struct dwz_file *dwz = dwarf2_get_dwz_file ();
2794 struct mapped_index dwz_map;
2795 const gdb_byte *dwz_types_ignore;
2796 offset_type dwz_types_elements_ignore;
2798 if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd),
2800 &dwz->gdb_index, &dwz_map,
2801 &dwz_list, &dwz_list_elements,
2803 &dwz_types_elements_ignore))
2805 warning (_("could not read '.gdb_index' section from %s; skipping"),
2806 bfd_get_filename (dwz->dwz_bfd));
2811 create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list,
2814 if (types_list_elements)
2816 struct dwarf2_section_info *section;
2818 /* We can only handle a single .debug_types when we have an
2820 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1)
2823 section = VEC_index (dwarf2_section_info_def,
2824 dwarf2_per_objfile->types, 0);
2826 create_signatured_type_table_from_index (objfile, section, types_list,
2827 types_list_elements);
2830 create_addrmap_from_index (objfile, &local_map);
2832 map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index));
2835 dwarf2_per_objfile->index_table = map;
2836 dwarf2_per_objfile->using_index = 1;
2837 dwarf2_per_objfile->quick_file_names_table =
2838 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
2843 /* A helper for the "quick" functions which sets the global
2844 dwarf2_per_objfile according to OBJFILE. */
2847 dw2_setup (struct objfile *objfile)
2849 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
2850 gdb_assert (dwarf2_per_objfile);
2853 /* die_reader_func for dw2_get_file_names. */
2856 dw2_get_file_names_reader (const struct die_reader_specs *reader,
2858 struct die_info *comp_unit_die,
2862 struct dwarf2_cu *cu = reader->cu;
2863 struct dwarf2_per_cu_data *this_cu = cu->per_cu;
2864 struct objfile *objfile = dwarf2_per_objfile->objfile;
2865 struct dwarf2_per_cu_data *lh_cu;
2866 struct line_header *lh;
2867 struct attribute *attr;
2869 const char *name, *comp_dir;
2871 struct quick_file_names *qfn;
2872 unsigned int line_offset;
2874 /* Our callers never want to match partial units -- instead they
2875 will match the enclosing full CU. */
2876 if (comp_unit_die->tag == DW_TAG_partial_unit)
2878 this_cu->v.quick->no_file_data = 1;
2882 /* If we're reading the line header for TUs, store it in the "per_cu"
2884 if (this_cu->is_debug_types)
2886 struct type_unit_group *tu_group = data;
2888 gdb_assert (tu_group != NULL);
2889 lh_cu = &tu_group->per_cu;
2898 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
2901 struct quick_file_names find_entry;
2903 line_offset = DW_UNSND (attr);
2905 /* We may have already read in this line header (TU line header sharing).
2906 If we have we're done. */
2907 find_entry.hash.dwo_unit = cu->dwo_unit;
2908 find_entry.hash.line_offset.sect_off = line_offset;
2909 slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
2910 &find_entry, INSERT);
2913 lh_cu->v.quick->file_names = *slot;
2917 lh = dwarf_decode_line_header (line_offset, cu);
2921 lh_cu->v.quick->no_file_data = 1;
2925 qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
2926 qfn->hash.dwo_unit = cu->dwo_unit;
2927 qfn->hash.line_offset.sect_off = line_offset;
2928 gdb_assert (slot != NULL);
2931 find_file_and_directory (comp_unit_die, cu, &name, &comp_dir);
2933 qfn->num_file_names = lh->num_file_names;
2934 qfn->file_names = obstack_alloc (&objfile->objfile_obstack,
2935 lh->num_file_names * sizeof (char *));
2936 for (i = 0; i < lh->num_file_names; ++i)
2937 qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir);
2938 qfn->real_names = NULL;
2940 free_line_header (lh);
2942 lh_cu->v.quick->file_names = qfn;
2945 /* A helper for the "quick" functions which attempts to read the line
2946 table for THIS_CU. */
2948 static struct quick_file_names *
2949 dw2_get_file_names (struct dwarf2_per_cu_data *this_cu)
2951 /* For TUs this should only be called on the parent group. */
2952 if (this_cu->is_debug_types)
2953 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu));
2955 if (this_cu->v.quick->file_names != NULL)
2956 return this_cu->v.quick->file_names;
2957 /* If we know there is no line data, no point in looking again. */
2958 if (this_cu->v.quick->no_file_data)
2961 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2962 in the stub for CUs, there's is no need to lookup the DWO file.
2963 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2965 if (this_cu->is_debug_types)
2967 struct type_unit_group *tu_group = this_cu->type_unit_group;
2969 init_cutu_and_read_dies (tu_group->t.first_tu, NULL, 0, 0,
2970 dw2_get_file_names_reader, tu_group);
2973 init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
2975 if (this_cu->v.quick->no_file_data)
2977 return this_cu->v.quick->file_names;
2980 /* A helper for the "quick" functions which computes and caches the
2981 real path for a given file name from the line table. */
2984 dw2_get_real_path (struct objfile *objfile,
2985 struct quick_file_names *qfn, int index)
2987 if (qfn->real_names == NULL)
2988 qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
2989 qfn->num_file_names, sizeof (char *));
2991 if (qfn->real_names[index] == NULL)
2992 qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
2994 return qfn->real_names[index];
2997 static struct symtab *
2998 dw2_find_last_source_symtab (struct objfile *objfile)
3002 dw2_setup (objfile);
3003 index = dwarf2_per_objfile->n_comp_units - 1;
3004 return dw2_instantiate_symtab (dw2_get_cu (index));
3007 /* Traversal function for dw2_forget_cached_source_info. */
3010 dw2_free_cached_file_names (void **slot, void *info)
3012 struct quick_file_names *file_data = (struct quick_file_names *) *slot;
3014 if (file_data->real_names)
3018 for (i = 0; i < file_data->num_file_names; ++i)
3020 xfree ((void*) file_data->real_names[i]);
3021 file_data->real_names[i] = NULL;
3029 dw2_forget_cached_source_info (struct objfile *objfile)
3031 dw2_setup (objfile);
3033 htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table,
3034 dw2_free_cached_file_names, NULL);
3037 /* Helper function for dw2_map_symtabs_matching_filename that expands
3038 the symtabs and calls the iterator. */
3041 dw2_map_expand_apply (struct objfile *objfile,
3042 struct dwarf2_per_cu_data *per_cu,
3043 const char *name, const char *real_path,
3044 int (*callback) (struct symtab *, void *),
3047 struct symtab *last_made = objfile->symtabs;
3049 /* Don't visit already-expanded CUs. */
3050 if (per_cu->v.quick->symtab)
3053 /* This may expand more than one symtab, and we want to iterate over
3055 dw2_instantiate_symtab (per_cu);
3057 return iterate_over_some_symtabs (name, real_path, callback, data,
3058 objfile->symtabs, last_made);
3061 /* Implementation of the map_symtabs_matching_filename method. */
3064 dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name,
3065 const char *real_path,
3066 int (*callback) (struct symtab *, void *),
3070 const char *name_basename = lbasename (name);
3072 dw2_setup (objfile);
3074 /* The rule is CUs specify all the files, including those used by
3075 any TU, so there's no need to scan TUs here. */
3077 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3080 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3081 struct quick_file_names *file_data;
3083 /* We only need to look at symtabs not already expanded. */
3084 if (per_cu->v.quick->symtab)
3087 file_data = dw2_get_file_names (per_cu);
3088 if (file_data == NULL)
3091 for (j = 0; j < file_data->num_file_names; ++j)
3093 const char *this_name = file_data->file_names[j];
3094 const char *this_real_name;
3096 if (compare_filenames_for_search (this_name, name))
3098 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3104 /* Before we invoke realpath, which can get expensive when many
3105 files are involved, do a quick comparison of the basenames. */
3106 if (! basenames_may_differ
3107 && FILENAME_CMP (lbasename (this_name), name_basename) != 0)
3110 this_real_name = dw2_get_real_path (objfile, file_data, j);
3111 if (compare_filenames_for_search (this_real_name, name))
3113 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3119 if (real_path != NULL)
3121 gdb_assert (IS_ABSOLUTE_PATH (real_path));
3122 gdb_assert (IS_ABSOLUTE_PATH (name));
3123 if (this_real_name != NULL
3124 && FILENAME_CMP (real_path, this_real_name) == 0)
3126 if (dw2_map_expand_apply (objfile, per_cu, name, real_path,
3138 /* Struct used to manage iterating over all CUs looking for a symbol. */
3140 struct dw2_symtab_iterator
3142 /* The internalized form of .gdb_index. */
3143 struct mapped_index *index;
3144 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3145 int want_specific_block;
3146 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3147 Unused if !WANT_SPECIFIC_BLOCK. */
3149 /* The kind of symbol we're looking for. */
3151 /* The list of CUs from the index entry of the symbol,
3152 or NULL if not found. */
3154 /* The next element in VEC to look at. */
3156 /* The number of elements in VEC, or zero if there is no match. */
3160 /* Initialize the index symtab iterator ITER.
3161 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3162 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3165 dw2_symtab_iter_init (struct dw2_symtab_iterator *iter,
3166 struct mapped_index *index,
3167 int want_specific_block,
3172 iter->index = index;
3173 iter->want_specific_block = want_specific_block;
3174 iter->block_index = block_index;
3175 iter->domain = domain;
3178 if (find_slot_in_mapped_hash (index, name, &iter->vec))
3179 iter->length = MAYBE_SWAP (*iter->vec);
3187 /* Return the next matching CU or NULL if there are no more. */
3189 static struct dwarf2_per_cu_data *
3190 dw2_symtab_iter_next (struct dw2_symtab_iterator *iter)
3192 for ( ; iter->next < iter->length; ++iter->next)
3194 offset_type cu_index_and_attrs =
3195 MAYBE_SWAP (iter->vec[iter->next + 1]);
3196 offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3197 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
3198 int want_static = iter->block_index != GLOBAL_BLOCK;
3199 /* This value is only valid for index versions >= 7. */
3200 int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
3201 gdb_index_symbol_kind symbol_kind =
3202 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3203 /* Only check the symbol attributes if they're present.
3204 Indices prior to version 7 don't record them,
3205 and indices >= 7 may elide them for certain symbols
3206 (gold does this). */
3208 (iter->index->version >= 7
3209 && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
3211 /* Skip if already read in. */
3212 if (per_cu->v.quick->symtab)
3216 && iter->want_specific_block
3217 && want_static != is_static)
3220 /* Only check the symbol's kind if it has one. */
3223 switch (iter->domain)
3226 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE
3227 && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION
3228 /* Some types are also in VAR_DOMAIN. */
3229 && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3233 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3237 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER)
3252 static struct symtab *
3253 dw2_lookup_symbol (struct objfile *objfile, int block_index,
3254 const char *name, domain_enum domain)
3256 struct symtab *stab_best = NULL;
3257 struct mapped_index *index;
3259 dw2_setup (objfile);
3261 index = dwarf2_per_objfile->index_table;
3263 /* index is NULL if OBJF_READNOW. */
3266 struct dw2_symtab_iterator iter;
3267 struct dwarf2_per_cu_data *per_cu;
3269 dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name);
3271 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3273 struct symbol *sym = NULL;
3274 struct symtab *stab = dw2_instantiate_symtab (per_cu);
3276 /* Some caution must be observed with overloaded functions
3277 and methods, since the index will not contain any overload
3278 information (but NAME might contain it). */
3281 struct blockvector *bv = BLOCKVECTOR (stab);
3282 struct block *block = BLOCKVECTOR_BLOCK (bv, block_index);
3284 sym = lookup_block_symbol (block, name, domain);
3287 if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0)
3289 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
3295 /* Keep looking through other CUs. */
3303 dw2_print_stats (struct objfile *objfile)
3305 int i, total, count;
3307 dw2_setup (objfile);
3308 total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units;
3310 for (i = 0; i < total; ++i)
3312 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3314 if (!per_cu->v.quick->symtab)
3317 printf_filtered (_(" Number of read CUs: %d\n"), total - count);
3318 printf_filtered (_(" Number of unread CUs: %d\n"), count);
3322 dw2_dump (struct objfile *objfile)
3324 /* Nothing worth printing. */
3328 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
3329 struct section_offsets *delta)
3331 /* There's nothing to relocate here. */
3335 dw2_expand_symtabs_for_function (struct objfile *objfile,
3336 const char *func_name)
3338 struct mapped_index *index;
3340 dw2_setup (objfile);
3342 index = dwarf2_per_objfile->index_table;
3344 /* index is NULL if OBJF_READNOW. */
3347 struct dw2_symtab_iterator iter;
3348 struct dwarf2_per_cu_data *per_cu;
3350 /* Note: It doesn't matter what we pass for block_index here. */
3351 dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN,
3354 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3355 dw2_instantiate_symtab (per_cu);
3360 dw2_expand_all_symtabs (struct objfile *objfile)
3364 dw2_setup (objfile);
3366 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3367 + dwarf2_per_objfile->n_type_units); ++i)
3369 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3371 dw2_instantiate_symtab (per_cu);
3376 dw2_expand_symtabs_with_fullname (struct objfile *objfile,
3377 const char *fullname)
3381 dw2_setup (objfile);
3383 /* We don't need to consider type units here.
3384 This is only called for examining code, e.g. expand_line_sal.
3385 There can be an order of magnitude (or more) more type units
3386 than comp units, and we avoid them if we can. */
3388 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3391 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3392 struct quick_file_names *file_data;
3394 /* We only need to look at symtabs not already expanded. */
3395 if (per_cu->v.quick->symtab)
3398 file_data = dw2_get_file_names (per_cu);
3399 if (file_data == NULL)
3402 for (j = 0; j < file_data->num_file_names; ++j)
3404 const char *this_fullname = file_data->file_names[j];
3406 if (filename_cmp (this_fullname, fullname) == 0)
3408 dw2_instantiate_symtab (per_cu);
3415 /* A helper function for dw2_find_symbol_file that finds the primary
3416 file name for a given CU. This is a die_reader_func. */
3419 dw2_get_primary_filename_reader (const struct die_reader_specs *reader,
3421 struct die_info *comp_unit_die,
3425 const char **result_ptr = data;
3426 struct dwarf2_cu *cu = reader->cu;
3427 struct attribute *attr;
3429 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
3433 *result_ptr = DW_STRING (attr);
3437 dw2_find_symbol_file (struct objfile *objfile, const char *name)
3439 struct dwarf2_per_cu_data *per_cu;
3441 const char *filename;
3443 dw2_setup (objfile);
3445 /* index_table is NULL if OBJF_READNOW. */
3446 if (!dwarf2_per_objfile->index_table)
3450 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
3452 struct blockvector *bv = BLOCKVECTOR (s);
3453 const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
3454 struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN);
3458 /* Only file extension of returned filename is recognized. */
3459 return SYMBOL_SYMTAB (sym)->filename;
3465 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
3469 /* Note that this just looks at the very first one named NAME -- but
3470 actually we are looking for a function. find_main_filename
3471 should be rewritten so that it doesn't require a custom hook. It
3472 could just use the ordinary symbol tables. */
3473 /* vec[0] is the length, which must always be >0. */
3474 per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1])));
3476 if (per_cu->v.quick->symtab != NULL)
3478 /* Only file extension of returned filename is recognized. */
3479 return per_cu->v.quick->symtab->filename;
3482 init_cutu_and_read_dies (per_cu, NULL, 0, 0,
3483 dw2_get_primary_filename_reader, &filename);
3485 /* Only file extension of returned filename is recognized. */
3490 dw2_map_matching_symbols (const char * name, domain_enum namespace,
3491 struct objfile *objfile, int global,
3492 int (*callback) (struct block *,
3493 struct symbol *, void *),
3494 void *data, symbol_compare_ftype *match,
3495 symbol_compare_ftype *ordered_compare)
3497 /* Currently unimplemented; used for Ada. The function can be called if the
3498 current language is Ada for a non-Ada objfile using GNU index. As Ada
3499 does not look for non-Ada symbols this function should just return. */
3503 dw2_expand_symtabs_matching
3504 (struct objfile *objfile,
3505 int (*file_matcher) (const char *, void *, int basenames),
3506 int (*name_matcher) (const char *, void *),
3507 enum search_domain kind,
3512 struct mapped_index *index;
3514 dw2_setup (objfile);
3516 /* index_table is NULL if OBJF_READNOW. */
3517 if (!dwarf2_per_objfile->index_table)
3519 index = dwarf2_per_objfile->index_table;
3521 if (file_matcher != NULL)
3523 struct cleanup *cleanup;
3524 htab_t visited_found, visited_not_found;
3526 visited_found = htab_create_alloc (10,
3527 htab_hash_pointer, htab_eq_pointer,
3528 NULL, xcalloc, xfree);
3529 cleanup = make_cleanup_htab_delete (visited_found);
3530 visited_not_found = htab_create_alloc (10,
3531 htab_hash_pointer, htab_eq_pointer,
3532 NULL, xcalloc, xfree);
3533 make_cleanup_htab_delete (visited_not_found);
3535 /* The rule is CUs specify all the files, including those used by
3536 any TU, so there's no need to scan TUs here. */
3538 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3541 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3542 struct quick_file_names *file_data;
3545 per_cu->v.quick->mark = 0;
3547 /* We only need to look at symtabs not already expanded. */
3548 if (per_cu->v.quick->symtab)
3551 file_data = dw2_get_file_names (per_cu);
3552 if (file_data == NULL)
3555 if (htab_find (visited_not_found, file_data) != NULL)
3557 else if (htab_find (visited_found, file_data) != NULL)
3559 per_cu->v.quick->mark = 1;
3563 for (j = 0; j < file_data->num_file_names; ++j)
3565 const char *this_real_name;
3567 if (file_matcher (file_data->file_names[j], data, 0))
3569 per_cu->v.quick->mark = 1;
3573 /* Before we invoke realpath, which can get expensive when many
3574 files are involved, do a quick comparison of the basenames. */
3575 if (!basenames_may_differ
3576 && !file_matcher (lbasename (file_data->file_names[j]),
3580 this_real_name = dw2_get_real_path (objfile, file_data, j);
3581 if (file_matcher (this_real_name, data, 0))
3583 per_cu->v.quick->mark = 1;
3588 slot = htab_find_slot (per_cu->v.quick->mark
3590 : visited_not_found,
3595 do_cleanups (cleanup);
3598 for (iter = 0; iter < index->symbol_table_slots; ++iter)
3600 offset_type idx = 2 * iter;
3602 offset_type *vec, vec_len, vec_idx;
3604 if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
3607 name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
3609 if (! (*name_matcher) (name, data))
3612 /* The name was matched, now expand corresponding CUs that were
3614 vec = (offset_type *) (index->constant_pool
3615 + MAYBE_SWAP (index->symbol_table[idx + 1]));
3616 vec_len = MAYBE_SWAP (vec[0]);
3617 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
3619 struct dwarf2_per_cu_data *per_cu;
3620 offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]);
3621 gdb_index_symbol_kind symbol_kind =
3622 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3623 int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3625 /* Don't crash on bad data. */
3626 if (cu_index >= (dwarf2_per_objfile->n_comp_units
3627 + dwarf2_per_objfile->n_type_units))
3630 /* Only check the symbol's kind if it has one.
3631 Indices prior to version 7 don't record it. */
3632 if (index->version >= 7)
3636 case VARIABLES_DOMAIN:
3637 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE)
3640 case FUNCTIONS_DOMAIN:
3641 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION)
3645 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3653 per_cu = dw2_get_cu (cu_index);
3654 if (file_matcher == NULL || per_cu->v.quick->mark)
3655 dw2_instantiate_symtab (per_cu);
3660 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3663 static struct symtab *
3664 recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc)
3668 if (BLOCKVECTOR (symtab) != NULL
3669 && blockvector_contains_pc (BLOCKVECTOR (symtab), pc))
3672 if (symtab->includes == NULL)
3675 for (i = 0; symtab->includes[i]; ++i)
3677 struct symtab *s = symtab->includes[i];
3679 s = recursively_find_pc_sect_symtab (s, pc);
3687 static struct symtab *
3688 dw2_find_pc_sect_symtab (struct objfile *objfile,
3689 struct minimal_symbol *msymbol,
3691 struct obj_section *section,
3694 struct dwarf2_per_cu_data *data;
3695 struct symtab *result;
3697 dw2_setup (objfile);
3699 if (!objfile->psymtabs_addrmap)
3702 data = addrmap_find (objfile->psymtabs_addrmap, pc);
3706 if (warn_if_readin && data->v.quick->symtab)
3707 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3708 paddress (get_objfile_arch (objfile), pc));
3710 result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc);
3711 gdb_assert (result != NULL);
3716 dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun,
3717 void *data, int need_fullname)
3720 struct cleanup *cleanup;
3721 htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer,
3722 NULL, xcalloc, xfree);
3724 cleanup = make_cleanup_htab_delete (visited);
3725 dw2_setup (objfile);
3727 /* The rule is CUs specify all the files, including those used by
3728 any TU, so there's no need to scan TUs here.
3729 We can ignore file names coming from already-expanded CUs. */
3731 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3733 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3735 if (per_cu->v.quick->symtab)
3737 void **slot = htab_find_slot (visited, per_cu->v.quick->file_names,
3740 *slot = per_cu->v.quick->file_names;
3744 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3747 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3748 struct quick_file_names *file_data;
3751 /* We only need to look at symtabs not already expanded. */
3752 if (per_cu->v.quick->symtab)
3755 file_data = dw2_get_file_names (per_cu);
3756 if (file_data == NULL)
3759 slot = htab_find_slot (visited, file_data, INSERT);
3762 /* Already visited. */
3767 for (j = 0; j < file_data->num_file_names; ++j)
3769 const char *this_real_name;
3772 this_real_name = dw2_get_real_path (objfile, file_data, j);
3774 this_real_name = NULL;
3775 (*fun) (file_data->file_names[j], this_real_name, data);
3779 do_cleanups (cleanup);
3783 dw2_has_symbols (struct objfile *objfile)
3788 const struct quick_symbol_functions dwarf2_gdb_index_functions =
3791 dw2_find_last_source_symtab,
3792 dw2_forget_cached_source_info,
3793 dw2_map_symtabs_matching_filename,
3798 dw2_expand_symtabs_for_function,
3799 dw2_expand_all_symtabs,
3800 dw2_expand_symtabs_with_fullname,
3801 dw2_find_symbol_file,
3802 dw2_map_matching_symbols,
3803 dw2_expand_symtabs_matching,
3804 dw2_find_pc_sect_symtab,
3805 dw2_map_symbol_filenames
3808 /* Initialize for reading DWARF for this objfile. Return 0 if this
3809 file will use psymtabs, or 1 if using the GNU index. */
3812 dwarf2_initialize_objfile (struct objfile *objfile)
3814 /* If we're about to read full symbols, don't bother with the
3815 indices. In this case we also don't care if some other debug
3816 format is making psymtabs, because they are all about to be
3818 if ((objfile->flags & OBJF_READNOW))
3822 dwarf2_per_objfile->using_index = 1;
3823 create_all_comp_units (objfile);
3824 create_all_type_units (objfile);
3825 dwarf2_per_objfile->quick_file_names_table =
3826 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
3828 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3829 + dwarf2_per_objfile->n_type_units); ++i)
3831 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3833 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
3834 struct dwarf2_per_cu_quick_data);
3837 /* Return 1 so that gdb sees the "quick" functions. However,
3838 these functions will be no-ops because we will have expanded
3843 if (dwarf2_read_index (objfile))
3851 /* Build a partial symbol table. */
3854 dwarf2_build_psymtabs (struct objfile *objfile)
3856 volatile struct gdb_exception except;
3858 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3860 init_psymbol_list (objfile, 1024);
3863 TRY_CATCH (except, RETURN_MASK_ERROR)
3865 /* This isn't really ideal: all the data we allocate on the
3866 objfile's obstack is still uselessly kept around. However,
3867 freeing it seems unsafe. */
3868 struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile);
3870 dwarf2_build_psymtabs_hard (objfile);
3871 discard_cleanups (cleanups);
3873 if (except.reason < 0)
3874 exception_print (gdb_stderr, except);
3877 /* Return the total length of the CU described by HEADER. */
3880 get_cu_length (const struct comp_unit_head *header)
3882 return header->initial_length_size + header->length;
3885 /* Return TRUE if OFFSET is within CU_HEADER. */
3888 offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset)
3890 sect_offset bottom = { cu_header->offset.sect_off };
3891 sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) };
3893 return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off);
3896 /* Find the base address of the compilation unit for range lists and
3897 location lists. It will normally be specified by DW_AT_low_pc.
3898 In DWARF-3 draft 4, the base address could be overridden by
3899 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3900 compilation units with discontinuous ranges. */
3903 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
3905 struct attribute *attr;
3908 cu->base_address = 0;
3910 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
3913 cu->base_address = DW_ADDR (attr);
3918 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3921 cu->base_address = DW_ADDR (attr);
3927 /* Read in the comp unit header information from the debug_info at info_ptr.
3928 NOTE: This leaves members offset, first_die_offset to be filled in
3932 read_comp_unit_head (struct comp_unit_head *cu_header,
3933 gdb_byte *info_ptr, bfd *abfd)
3936 unsigned int bytes_read;
3938 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
3939 cu_header->initial_length_size = bytes_read;
3940 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
3941 info_ptr += bytes_read;
3942 cu_header->version = read_2_bytes (abfd, info_ptr);
3944 cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header,
3946 info_ptr += bytes_read;
3947 cu_header->addr_size = read_1_byte (abfd, info_ptr);
3949 signed_addr = bfd_get_sign_extend_vma (abfd);
3950 if (signed_addr < 0)
3951 internal_error (__FILE__, __LINE__,
3952 _("read_comp_unit_head: dwarf from non elf file"));
3953 cu_header->signed_addr_p = signed_addr;
3958 /* Helper function that returns the proper abbrev section for
3961 static struct dwarf2_section_info *
3962 get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu)
3964 struct dwarf2_section_info *abbrev;
3966 if (this_cu->is_dwz)
3967 abbrev = &dwarf2_get_dwz_file ()->abbrev;
3969 abbrev = &dwarf2_per_objfile->abbrev;
3974 /* Subroutine of read_and_check_comp_unit_head and
3975 read_and_check_type_unit_head to simplify them.
3976 Perform various error checking on the header. */
3979 error_check_comp_unit_head (struct comp_unit_head *header,
3980 struct dwarf2_section_info *section,
3981 struct dwarf2_section_info *abbrev_section)
3983 bfd *abfd = section->asection->owner;
3984 const char *filename = bfd_get_filename (abfd);
3986 if (header->version != 2 && header->version != 3 && header->version != 4)
3987 error (_("Dwarf Error: wrong version in compilation unit header "
3988 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
3991 if (header->abbrev_offset.sect_off
3992 >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section))
3993 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3994 "(offset 0x%lx + 6) [in module %s]"),
3995 (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off,
3998 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3999 avoid potential 32-bit overflow. */
4000 if (((unsigned long) header->offset.sect_off + get_cu_length (header))
4002 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4003 "(offset 0x%lx + 0) [in module %s]"),
4004 (long) header->length, (long) header->offset.sect_off,
4008 /* Read in a CU/TU header and perform some basic error checking.
4009 The contents of the header are stored in HEADER.
4010 The result is a pointer to the start of the first DIE. */
4013 read_and_check_comp_unit_head (struct comp_unit_head *header,
4014 struct dwarf2_section_info *section,
4015 struct dwarf2_section_info *abbrev_section,
4017 int is_debug_types_section)
4019 gdb_byte *beg_of_comp_unit = info_ptr;
4020 bfd *abfd = section->asection->owner;
4022 header->offset.sect_off = beg_of_comp_unit - section->buffer;
4024 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
4026 /* If we're reading a type unit, skip over the signature and
4027 type_offset fields. */
4028 if (is_debug_types_section)
4029 info_ptr += 8 /*signature*/ + header->offset_size;
4031 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4033 error_check_comp_unit_head (header, section, abbrev_section);
4038 /* Read in the types comp unit header information from .debug_types entry at
4039 types_ptr. The result is a pointer to one past the end of the header. */
4042 read_and_check_type_unit_head (struct comp_unit_head *header,
4043 struct dwarf2_section_info *section,
4044 struct dwarf2_section_info *abbrev_section,
4046 ULONGEST *signature,
4047 cu_offset *type_offset_in_tu)
4049 gdb_byte *beg_of_comp_unit = info_ptr;
4050 bfd *abfd = section->asection->owner;
4052 header->offset.sect_off = beg_of_comp_unit - section->buffer;
4054 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
4056 /* If we're reading a type unit, skip over the signature and
4057 type_offset fields. */
4058 if (signature != NULL)
4059 *signature = read_8_bytes (abfd, info_ptr);
4061 if (type_offset_in_tu != NULL)
4062 type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr,
4063 header->offset_size);
4064 info_ptr += header->offset_size;
4066 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4068 error_check_comp_unit_head (header, section, abbrev_section);
4073 /* Fetch the abbreviation table offset from a comp or type unit header. */
4076 read_abbrev_offset (struct dwarf2_section_info *section,
4079 bfd *abfd = section->asection->owner;
4081 unsigned int length, initial_length_size, offset_size;
4082 sect_offset abbrev_offset;
4084 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
4085 info_ptr = section->buffer + offset.sect_off;
4086 length = read_initial_length (abfd, info_ptr, &initial_length_size);
4087 offset_size = initial_length_size == 4 ? 4 : 8;
4088 info_ptr += initial_length_size + 2 /*version*/;
4089 abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size);
4090 return abbrev_offset;
4093 /* Allocate a new partial symtab for file named NAME and mark this new
4094 partial symtab as being an include of PST. */
4097 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
4098 struct objfile *objfile)
4100 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
4102 if (!IS_ABSOLUTE_PATH (subpst->filename))
4104 /* It shares objfile->objfile_obstack. */
4105 subpst->dirname = pst->dirname;
4108 subpst->section_offsets = pst->section_offsets;
4109 subpst->textlow = 0;
4110 subpst->texthigh = 0;
4112 subpst->dependencies = (struct partial_symtab **)
4113 obstack_alloc (&objfile->objfile_obstack,
4114 sizeof (struct partial_symtab *));
4115 subpst->dependencies[0] = pst;
4116 subpst->number_of_dependencies = 1;
4118 subpst->globals_offset = 0;
4119 subpst->n_global_syms = 0;
4120 subpst->statics_offset = 0;
4121 subpst->n_static_syms = 0;
4122 subpst->symtab = NULL;
4123 subpst->read_symtab = pst->read_symtab;
4126 /* No private part is necessary for include psymtabs. This property
4127 can be used to differentiate between such include psymtabs and
4128 the regular ones. */
4129 subpst->read_symtab_private = NULL;
4132 /* Read the Line Number Program data and extract the list of files
4133 included by the source file represented by PST. Build an include
4134 partial symtab for each of these included files. */
4137 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
4138 struct die_info *die,
4139 struct partial_symtab *pst)
4141 struct line_header *lh = NULL;
4142 struct attribute *attr;
4144 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
4146 lh = dwarf_decode_line_header (DW_UNSND (attr), cu);
4148 return; /* No linetable, so no includes. */
4150 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4151 dwarf_decode_lines (lh, pst->dirname, cu, pst, 1);
4153 free_line_header (lh);
4157 hash_signatured_type (const void *item)
4159 const struct signatured_type *sig_type = item;
4161 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4162 return sig_type->signature;
4166 eq_signatured_type (const void *item_lhs, const void *item_rhs)
4168 const struct signatured_type *lhs = item_lhs;
4169 const struct signatured_type *rhs = item_rhs;
4171 return lhs->signature == rhs->signature;
4174 /* Allocate a hash table for signatured types. */
4177 allocate_signatured_type_table (struct objfile *objfile)
4179 return htab_create_alloc_ex (41,
4180 hash_signatured_type,
4183 &objfile->objfile_obstack,
4184 hashtab_obstack_allocate,
4185 dummy_obstack_deallocate);
4188 /* A helper function to add a signatured type CU to a table. */
4191 add_signatured_type_cu_to_table (void **slot, void *datum)
4193 struct signatured_type *sigt = *slot;
4194 struct signatured_type ***datap = datum;
4202 /* Create the hash table of all entries in the .debug_types section.
4203 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4205 Note: This function processes DWO files only, not DWP files.
4206 The result is a pointer to the hash table or NULL if there are
4210 create_debug_types_hash_table (struct dwo_file *dwo_file,
4211 VEC (dwarf2_section_info_def) *types)
4213 struct objfile *objfile = dwarf2_per_objfile->objfile;
4214 htab_t types_htab = NULL;
4216 struct dwarf2_section_info *section;
4217 struct dwarf2_section_info *abbrev_section;
4219 if (VEC_empty (dwarf2_section_info_def, types))
4222 abbrev_section = (dwo_file != NULL
4223 ? &dwo_file->sections.abbrev
4224 : &dwarf2_per_objfile->abbrev);
4226 if (dwarf2_read_debug)
4227 fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n",
4228 dwo_file ? ".dwo" : "",
4229 bfd_get_filename (abbrev_section->asection->owner));
4232 VEC_iterate (dwarf2_section_info_def, types, ix, section);
4236 gdb_byte *info_ptr, *end_ptr;
4237 struct dwarf2_section_info *abbrev_section;
4239 dwarf2_read_section (objfile, section);
4240 info_ptr = section->buffer;
4242 if (info_ptr == NULL)
4245 /* We can't set abfd until now because the section may be empty or
4246 not present, in which case section->asection will be NULL. */
4247 abfd = section->asection->owner;
4250 abbrev_section = &dwo_file->sections.abbrev;
4252 abbrev_section = &dwarf2_per_objfile->abbrev;
4254 if (types_htab == NULL)
4257 types_htab = allocate_dwo_unit_table (objfile);
4259 types_htab = allocate_signatured_type_table (objfile);
4262 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4263 because we don't need to read any dies: the signature is in the
4266 end_ptr = info_ptr + section->size;
4267 while (info_ptr < end_ptr)
4270 cu_offset type_offset_in_tu;
4272 struct signatured_type *sig_type;
4273 struct dwo_unit *dwo_tu;
4275 gdb_byte *ptr = info_ptr;
4276 struct comp_unit_head header;
4277 unsigned int length;
4279 offset.sect_off = ptr - section->buffer;
4281 /* We need to read the type's signature in order to build the hash
4282 table, but we don't need anything else just yet. */
4284 ptr = read_and_check_type_unit_head (&header, section,
4285 abbrev_section, ptr,
4286 &signature, &type_offset_in_tu);
4288 length = get_cu_length (&header);
4290 /* Skip dummy type units. */
4291 if (ptr >= info_ptr + length
4292 || peek_abbrev_code (abfd, ptr) == 0)
4301 dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4303 dwo_tu->dwo_file = dwo_file;
4304 dwo_tu->signature = signature;
4305 dwo_tu->type_offset_in_tu = type_offset_in_tu;
4306 dwo_tu->section = section;
4307 dwo_tu->offset = offset;
4308 dwo_tu->length = length;
4312 /* N.B.: type_offset is not usable if this type uses a DWO file.
4313 The real type_offset is in the DWO file. */
4315 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4316 struct signatured_type);
4317 sig_type->signature = signature;
4318 sig_type->type_offset_in_tu = type_offset_in_tu;
4319 sig_type->per_cu.objfile = objfile;
4320 sig_type->per_cu.is_debug_types = 1;
4321 sig_type->per_cu.section = section;
4322 sig_type->per_cu.offset = offset;
4323 sig_type->per_cu.length = length;
4326 slot = htab_find_slot (types_htab,
4327 dwo_file ? (void*) dwo_tu : (void *) sig_type,
4329 gdb_assert (slot != NULL);
4332 sect_offset dup_offset;
4336 const struct dwo_unit *dup_tu = *slot;
4338 dup_offset = dup_tu->offset;
4342 const struct signatured_type *dup_tu = *slot;
4344 dup_offset = dup_tu->per_cu.offset;
4347 complaint (&symfile_complaints,
4348 _("debug type entry at offset 0x%x is duplicate to the "
4349 "entry at offset 0x%x, signature 0x%s"),
4350 offset.sect_off, dup_offset.sect_off,
4351 phex (signature, sizeof (signature)));
4353 *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type;
4355 if (dwarf2_read_debug)
4356 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
4358 phex (signature, sizeof (signature)));
4367 /* Create the hash table of all entries in the .debug_types section,
4368 and initialize all_type_units.
4369 The result is zero if there is an error (e.g. missing .debug_types section),
4370 otherwise non-zero. */
4373 create_all_type_units (struct objfile *objfile)
4376 struct signatured_type **iter;
4378 types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types);
4379 if (types_htab == NULL)
4381 dwarf2_per_objfile->signatured_types = NULL;
4385 dwarf2_per_objfile->signatured_types = types_htab;
4387 dwarf2_per_objfile->n_type_units = htab_elements (types_htab);
4388 dwarf2_per_objfile->all_type_units
4389 = obstack_alloc (&objfile->objfile_obstack,
4390 dwarf2_per_objfile->n_type_units
4391 * sizeof (struct signatured_type *));
4392 iter = &dwarf2_per_objfile->all_type_units[0];
4393 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter);
4394 gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0]
4395 == dwarf2_per_objfile->n_type_units);
4400 /* Lookup a signature based type for DW_FORM_ref_sig8.
4401 Returns NULL if signature SIG is not present in the table. */
4403 static struct signatured_type *
4404 lookup_signatured_type (ULONGEST sig)
4406 struct signatured_type find_entry, *entry;
4408 if (dwarf2_per_objfile->signatured_types == NULL)
4410 complaint (&symfile_complaints,
4411 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4415 find_entry.signature = sig;
4416 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
4420 /* Low level DIE reading support. */
4422 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4425 init_cu_die_reader (struct die_reader_specs *reader,
4426 struct dwarf2_cu *cu,
4427 struct dwarf2_section_info *section,
4428 struct dwo_file *dwo_file)
4430 gdb_assert (section->readin && section->buffer != NULL);
4431 reader->abfd = section->asection->owner;
4433 reader->dwo_file = dwo_file;
4434 reader->die_section = section;
4435 reader->buffer = section->buffer;
4436 reader->buffer_end = section->buffer + section->size;
4439 /* Initialize a CU (or TU) and read its DIEs.
4440 If the CU defers to a DWO file, read the DWO file as well.
4442 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4443 Otherwise the table specified in the comp unit header is read in and used.
4444 This is an optimization for when we already have the abbrev table.
4446 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4447 Otherwise, a new CU is allocated with xmalloc.
4449 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4450 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4452 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4453 linker) then DIE_READER_FUNC will not get called. */
4456 init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
4457 struct abbrev_table *abbrev_table,
4458 int use_existing_cu, int keep,
4459 die_reader_func_ftype *die_reader_func,
4462 struct objfile *objfile = dwarf2_per_objfile->objfile;
4463 struct dwarf2_section_info *section = this_cu->section;
4464 bfd *abfd = section->asection->owner;
4465 struct dwarf2_cu *cu;
4466 gdb_byte *begin_info_ptr, *info_ptr;
4467 struct die_reader_specs reader;
4468 struct die_info *comp_unit_die;
4470 struct attribute *attr;
4471 struct cleanup *cleanups, *free_cu_cleanup = NULL;
4472 struct signatured_type *sig_type = NULL;
4473 struct dwarf2_section_info *abbrev_section;
4474 /* Non-zero if CU currently points to a DWO file and we need to
4475 reread it. When this happens we need to reread the skeleton die
4476 before we can reread the DWO file. */
4477 int rereading_dwo_cu = 0;
4479 if (dwarf2_die_debug)
4480 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
4481 this_cu->is_debug_types ? "type" : "comp",
4482 this_cu->offset.sect_off);
4484 if (use_existing_cu)
4487 cleanups = make_cleanup (null_cleanup, NULL);
4489 /* This is cheap if the section is already read in. */
4490 dwarf2_read_section (objfile, section);
4492 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
4494 abbrev_section = get_abbrev_section_for_cu (this_cu);
4496 if (use_existing_cu && this_cu->cu != NULL)
4500 /* If this CU is from a DWO file we need to start over, we need to
4501 refetch the attributes from the skeleton CU.
4502 This could be optimized by retrieving those attributes from when we
4503 were here the first time: the previous comp_unit_die was stored in
4504 comp_unit_obstack. But there's no data yet that we need this
4506 if (cu->dwo_unit != NULL)
4507 rereading_dwo_cu = 1;
4511 /* If !use_existing_cu, this_cu->cu must be NULL. */
4512 gdb_assert (this_cu->cu == NULL);
4514 cu = xmalloc (sizeof (*cu));
4515 init_one_comp_unit (cu, this_cu);
4517 /* If an error occurs while loading, release our storage. */
4518 free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
4521 if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu)
4523 /* We already have the header, there's no need to read it in again. */
4524 info_ptr += cu->header.first_die_offset.cu_off;
4528 if (this_cu->is_debug_types)
4531 cu_offset type_offset_in_tu;
4533 info_ptr = read_and_check_type_unit_head (&cu->header, section,
4534 abbrev_section, info_ptr,
4536 &type_offset_in_tu);
4538 /* Since per_cu is the first member of struct signatured_type,
4539 we can go from a pointer to one to a pointer to the other. */
4540 sig_type = (struct signatured_type *) this_cu;
4541 gdb_assert (sig_type->signature == signature);
4542 gdb_assert (sig_type->type_offset_in_tu.cu_off
4543 == type_offset_in_tu.cu_off);
4544 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
4546 /* LENGTH has not been set yet for type units if we're
4547 using .gdb_index. */
4548 this_cu->length = get_cu_length (&cu->header);
4550 /* Establish the type offset that can be used to lookup the type. */
4551 sig_type->type_offset_in_section.sect_off =
4552 this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off;
4556 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
4560 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
4561 gdb_assert (this_cu->length == get_cu_length (&cu->header));
4565 /* Skip dummy compilation units. */
4566 if (info_ptr >= begin_info_ptr + this_cu->length
4567 || peek_abbrev_code (abfd, info_ptr) == 0)
4569 do_cleanups (cleanups);
4573 /* If we don't have them yet, read the abbrevs for this compilation unit.
4574 And if we need to read them now, make sure they're freed when we're
4575 done. Note that it's important that if the CU had an abbrev table
4576 on entry we don't free it when we're done: Somewhere up the call stack
4577 it may be in use. */
4578 if (abbrev_table != NULL)
4580 gdb_assert (cu->abbrev_table == NULL);
4581 gdb_assert (cu->header.abbrev_offset.sect_off
4582 == abbrev_table->offset.sect_off);
4583 cu->abbrev_table = abbrev_table;
4585 else if (cu->abbrev_table == NULL)
4587 dwarf2_read_abbrevs (cu, abbrev_section);
4588 make_cleanup (dwarf2_free_abbrev_table, cu);
4590 else if (rereading_dwo_cu)
4592 dwarf2_free_abbrev_table (cu);
4593 dwarf2_read_abbrevs (cu, abbrev_section);
4596 /* Read the top level CU/TU die. */
4597 init_cu_die_reader (&reader, cu, section, NULL);
4598 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
4600 /* If we have a DWO stub, process it and then read in the DWO file.
4601 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4602 a DWO CU, that this test will fail. */
4603 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
4606 const char *dwo_name = DW_STRING (attr);
4607 const char *comp_dir_string;
4608 struct dwo_unit *dwo_unit;
4609 ULONGEST signature; /* Or dwo_id. */
4610 struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
4611 int i,num_extra_attrs;
4612 struct dwarf2_section_info *dwo_abbrev_section;
4615 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4616 " has children (offset 0x%x) [in module %s]"),
4617 this_cu->offset.sect_off, bfd_get_filename (abfd));
4619 /* These attributes aren't processed until later:
4620 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4621 However, the attribute is found in the stub which we won't have later.
4622 In order to not impose this complication on the rest of the code,
4623 we read them here and copy them to the DWO CU/TU die. */
4625 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4628 if (! this_cu->is_debug_types)
4629 stmt_list = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
4630 low_pc = dwarf2_attr (comp_unit_die, DW_AT_low_pc, cu);
4631 high_pc = dwarf2_attr (comp_unit_die, DW_AT_high_pc, cu);
4632 ranges = dwarf2_attr (comp_unit_die, DW_AT_ranges, cu);
4633 comp_dir = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
4635 /* There should be a DW_AT_addr_base attribute here (if needed).
4636 We need the value before we can process DW_FORM_GNU_addr_index. */
4638 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu);
4640 cu->addr_base = DW_UNSND (attr);
4642 /* There should be a DW_AT_ranges_base attribute here (if needed).
4643 We need the value before we can process DW_AT_ranges. */
4644 cu->ranges_base = 0;
4645 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu);
4647 cu->ranges_base = DW_UNSND (attr);
4649 if (this_cu->is_debug_types)
4651 gdb_assert (sig_type != NULL);
4652 signature = sig_type->signature;
4656 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
4658 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4660 signature = DW_UNSND (attr);
4663 /* We may need the comp_dir in order to find the DWO file. */
4664 comp_dir_string = NULL;
4666 comp_dir_string = DW_STRING (comp_dir);
4668 if (this_cu->is_debug_types)
4669 dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir_string);
4671 dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir_string,
4674 if (dwo_unit == NULL)
4676 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4677 " with ID %s [in module %s]"),
4678 this_cu->offset.sect_off,
4679 phex (signature, sizeof (signature)),
4683 /* Set up for reading the DWO CU/TU. */
4684 cu->dwo_unit = dwo_unit;
4685 section = dwo_unit->section;
4686 dwarf2_read_section (objfile, section);
4687 begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
4688 dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
4689 init_cu_die_reader (&reader, cu, section, dwo_unit->dwo_file);
4691 if (this_cu->is_debug_types)
4694 cu_offset type_offset_in_tu;
4696 info_ptr = read_and_check_type_unit_head (&cu->header, section,
4700 &type_offset_in_tu);
4701 gdb_assert (sig_type->signature == signature);
4702 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
4703 /* For DWOs coming from DWP files, we don't know the CU length
4704 nor the type's offset in the TU until now. */
4705 dwo_unit->length = get_cu_length (&cu->header);
4706 dwo_unit->type_offset_in_tu = type_offset_in_tu;
4708 /* Establish the type offset that can be used to lookup the type.
4709 For DWO files, we don't know it until now. */
4710 sig_type->type_offset_in_section.sect_off =
4711 dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
4715 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
4718 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
4719 /* For DWOs coming from DWP files, we don't know the CU length
4721 dwo_unit->length = get_cu_length (&cu->header);
4724 /* Discard the original CU's abbrev table, and read the DWO's. */
4725 if (abbrev_table == NULL)
4727 dwarf2_free_abbrev_table (cu);
4728 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
4732 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
4733 make_cleanup (dwarf2_free_abbrev_table, cu);
4736 /* Read in the die, but leave space to copy over the attributes
4737 from the stub. This has the benefit of simplifying the rest of
4738 the code - all the real work is done here. */
4739 num_extra_attrs = ((stmt_list != NULL)
4743 + (comp_dir != NULL));
4744 info_ptr = read_full_die_1 (&reader, &comp_unit_die, info_ptr,
4745 &has_children, num_extra_attrs);
4747 /* Copy over the attributes from the stub to the DWO die. */
4748 i = comp_unit_die->num_attrs;
4749 if (stmt_list != NULL)
4750 comp_unit_die->attrs[i++] = *stmt_list;
4752 comp_unit_die->attrs[i++] = *low_pc;
4753 if (high_pc != NULL)
4754 comp_unit_die->attrs[i++] = *high_pc;
4756 comp_unit_die->attrs[i++] = *ranges;
4757 if (comp_dir != NULL)
4758 comp_unit_die->attrs[i++] = *comp_dir;
4759 comp_unit_die->num_attrs += num_extra_attrs;
4761 /* Skip dummy compilation units. */
4762 if (info_ptr >= begin_info_ptr + dwo_unit->length
4763 || peek_abbrev_code (abfd, info_ptr) == 0)
4765 do_cleanups (cleanups);
4770 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
4772 if (free_cu_cleanup != NULL)
4776 /* We've successfully allocated this compilation unit. Let our
4777 caller clean it up when finished with it. */
4778 discard_cleanups (free_cu_cleanup);
4780 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4781 So we have to manually free the abbrev table. */
4782 dwarf2_free_abbrev_table (cu);
4784 /* Link this CU into read_in_chain. */
4785 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4786 dwarf2_per_objfile->read_in_chain = this_cu;
4789 do_cleanups (free_cu_cleanup);
4792 do_cleanups (cleanups);
4795 /* Read CU/TU THIS_CU in section SECTION,
4796 but do not follow DW_AT_GNU_dwo_name if present.
4797 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4798 to have already done the lookup to find the DWO/DWP file).
4800 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4801 THIS_CU->is_debug_types, but nothing else.
4803 We fill in THIS_CU->length.
4805 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4806 linker) then DIE_READER_FUNC will not get called.
4808 THIS_CU->cu is always freed when done.
4809 This is done in order to not leave THIS_CU->cu in a state where we have
4810 to care whether it refers to the "main" CU or the DWO CU. */
4813 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu,
4814 struct dwarf2_section_info *abbrev_section,
4815 struct dwo_file *dwo_file,
4816 die_reader_func_ftype *die_reader_func,
4819 struct objfile *objfile = dwarf2_per_objfile->objfile;
4820 struct dwarf2_section_info *section = this_cu->section;
4821 bfd *abfd = section->asection->owner;
4822 struct dwarf2_cu cu;
4823 gdb_byte *begin_info_ptr, *info_ptr;
4824 struct die_reader_specs reader;
4825 struct cleanup *cleanups;
4826 struct die_info *comp_unit_die;
4829 if (dwarf2_die_debug)
4830 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
4831 this_cu->is_debug_types ? "type" : "comp",
4832 this_cu->offset.sect_off);
4834 gdb_assert (this_cu->cu == NULL);
4836 /* This is cheap if the section is already read in. */
4837 dwarf2_read_section (objfile, section);
4839 init_one_comp_unit (&cu, this_cu);
4841 cleanups = make_cleanup (free_stack_comp_unit, &cu);
4843 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
4844 info_ptr = read_and_check_comp_unit_head (&cu.header, section,
4845 abbrev_section, info_ptr,
4846 this_cu->is_debug_types);
4848 this_cu->length = get_cu_length (&cu.header);
4850 /* Skip dummy compilation units. */
4851 if (info_ptr >= begin_info_ptr + this_cu->length
4852 || peek_abbrev_code (abfd, info_ptr) == 0)
4854 do_cleanups (cleanups);
4858 dwarf2_read_abbrevs (&cu, abbrev_section);
4859 make_cleanup (dwarf2_free_abbrev_table, &cu);
4861 init_cu_die_reader (&reader, &cu, section, dwo_file);
4862 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
4864 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
4866 do_cleanups (cleanups);
4869 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4870 does not lookup the specified DWO file.
4871 This cannot be used to read DWO files.
4873 THIS_CU->cu is always freed when done.
4874 This is done in order to not leave THIS_CU->cu in a state where we have
4875 to care whether it refers to the "main" CU or the DWO CU.
4876 We can revisit this if the data shows there's a performance issue. */
4879 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu,
4880 die_reader_func_ftype *die_reader_func,
4883 init_cutu_and_read_dies_no_follow (this_cu,
4884 get_abbrev_section_for_cu (this_cu),
4886 die_reader_func, data);
4889 /* Type Unit Groups.
4891 Type Unit Groups are a way to collapse the set of all TUs (type units) into
4892 a more manageable set. The grouping is done by DW_AT_stmt_list entry
4893 so that all types coming from the same compilation (.o file) are grouped
4894 together. A future step could be to put the types in the same symtab as
4895 the CU the types ultimately came from. */
4898 hash_type_unit_group (const void *item)
4900 const struct type_unit_group *tu_group = item;
4902 return hash_stmt_list_entry (&tu_group->hash);
4906 eq_type_unit_group (const void *item_lhs, const void *item_rhs)
4908 const struct type_unit_group *lhs = item_lhs;
4909 const struct type_unit_group *rhs = item_rhs;
4911 return eq_stmt_list_entry (&lhs->hash, &rhs->hash);
4914 /* Allocate a hash table for type unit groups. */
4917 allocate_type_unit_groups_table (void)
4919 return htab_create_alloc_ex (3,
4920 hash_type_unit_group,
4923 &dwarf2_per_objfile->objfile->objfile_obstack,
4924 hashtab_obstack_allocate,
4925 dummy_obstack_deallocate);
4928 /* Type units that don't have DW_AT_stmt_list are grouped into their own
4929 partial symtabs. We combine several TUs per psymtab to not let the size
4930 of any one psymtab grow too big. */
4931 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
4932 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
4934 /* Helper routine for get_type_unit_group.
4935 Create the type_unit_group object used to hold one or more TUs. */
4937 static struct type_unit_group *
4938 create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct)
4940 struct objfile *objfile = dwarf2_per_objfile->objfile;
4941 struct dwarf2_per_cu_data *per_cu;
4942 struct type_unit_group *tu_group;
4944 tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4945 struct type_unit_group);
4946 per_cu = &tu_group->per_cu;
4947 per_cu->objfile = objfile;
4948 per_cu->is_debug_types = 1;
4949 per_cu->type_unit_group = tu_group;
4951 if (dwarf2_per_objfile->using_index)
4953 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4954 struct dwarf2_per_cu_quick_data);
4955 tu_group->t.first_tu = cu->per_cu;
4959 unsigned int line_offset = line_offset_struct.sect_off;
4960 struct partial_symtab *pst;
4963 /* Give the symtab a useful name for debug purposes. */
4964 if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
4965 name = xstrprintf ("<type_units_%d>",
4966 (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
4968 name = xstrprintf ("<type_units_at_0x%x>", line_offset);
4970 pst = create_partial_symtab (per_cu, name);
4976 tu_group->hash.dwo_unit = cu->dwo_unit;
4977 tu_group->hash.line_offset = line_offset_struct;
4982 /* Look up the type_unit_group for type unit CU, and create it if necessary.
4983 STMT_LIST is a DW_AT_stmt_list attribute. */
4985 static struct type_unit_group *
4986 get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list)
4988 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
4989 struct type_unit_group *tu_group;
4991 unsigned int line_offset;
4992 struct type_unit_group type_unit_group_for_lookup;
4994 if (dwarf2_per_objfile->type_unit_groups == NULL)
4996 dwarf2_per_objfile->type_unit_groups =
4997 allocate_type_unit_groups_table ();
5000 /* Do we need to create a new group, or can we use an existing one? */
5004 line_offset = DW_UNSND (stmt_list);
5005 ++tu_stats->nr_symtab_sharers;
5009 /* Ugh, no stmt_list. Rare, but we have to handle it.
5010 We can do various things here like create one group per TU or
5011 spread them over multiple groups to split up the expansion work.
5012 To avoid worst case scenarios (too many groups or too large groups)
5013 we, umm, group them in bunches. */
5014 line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5015 | (tu_stats->nr_stmt_less_type_units
5016 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE));
5017 ++tu_stats->nr_stmt_less_type_units;
5020 type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit;
5021 type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset;
5022 slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups,
5023 &type_unit_group_for_lookup, INSERT);
5027 gdb_assert (tu_group != NULL);
5031 sect_offset line_offset_struct;
5033 line_offset_struct.sect_off = line_offset;
5034 tu_group = create_type_unit_group (cu, line_offset_struct);
5036 ++tu_stats->nr_symtabs;
5042 /* Struct used to sort TUs by their abbreviation table offset. */
5044 struct tu_abbrev_offset
5046 struct signatured_type *sig_type;
5047 sect_offset abbrev_offset;
5050 /* Helper routine for build_type_unit_groups, passed to qsort. */
5053 sort_tu_by_abbrev_offset (const void *ap, const void *bp)
5055 const struct tu_abbrev_offset * const *a = ap;
5056 const struct tu_abbrev_offset * const *b = bp;
5057 unsigned int aoff = (*a)->abbrev_offset.sect_off;
5058 unsigned int boff = (*b)->abbrev_offset.sect_off;
5060 return (aoff > boff) - (aoff < boff);
5063 /* A helper function to add a type_unit_group to a table. */
5066 add_type_unit_group_to_table (void **slot, void *datum)
5068 struct type_unit_group *tu_group = *slot;
5069 struct type_unit_group ***datap = datum;
5077 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5078 each one passing FUNC,DATA.
5080 The efficiency is because we sort TUs by the abbrev table they use and
5081 only read each abbrev table once. In one program there are 200K TUs
5082 sharing 8K abbrev tables.
5084 The main purpose of this function is to support building the
5085 dwarf2_per_objfile->type_unit_groups table.
5086 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5087 can collapse the search space by grouping them by stmt_list.
5088 The savings can be significant, in the same program from above the 200K TUs
5089 share 8K stmt_list tables.
5091 FUNC is expected to call get_type_unit_group, which will create the
5092 struct type_unit_group if necessary and add it to
5093 dwarf2_per_objfile->type_unit_groups. */
5096 build_type_unit_groups (die_reader_func_ftype *func, void *data)
5098 struct objfile *objfile = dwarf2_per_objfile->objfile;
5099 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
5100 struct cleanup *cleanups;
5101 struct abbrev_table *abbrev_table;
5102 sect_offset abbrev_offset;
5103 struct tu_abbrev_offset *sorted_by_abbrev;
5104 struct type_unit_group **iter;
5107 /* It's up to the caller to not call us multiple times. */
5108 gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL);
5110 if (dwarf2_per_objfile->n_type_units == 0)
5113 /* TUs typically share abbrev tables, and there can be way more TUs than
5114 abbrev tables. Sort by abbrev table to reduce the number of times we
5115 read each abbrev table in.
5116 Alternatives are to punt or to maintain a cache of abbrev tables.
5117 This is simpler and efficient enough for now.
5119 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5120 symtab to use). Typically TUs with the same abbrev offset have the same
5121 stmt_list value too so in practice this should work well.
5123 The basic algorithm here is:
5125 sort TUs by abbrev table
5126 for each TU with same abbrev table:
5127 read abbrev table if first user
5128 read TU top level DIE
5129 [IWBN if DWO skeletons had DW_AT_stmt_list]
5132 if (dwarf2_read_debug)
5133 fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n");
5135 /* Sort in a separate table to maintain the order of all_type_units
5136 for .gdb_index: TU indices directly index all_type_units. */
5137 sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset,
5138 dwarf2_per_objfile->n_type_units);
5139 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
5141 struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i];
5143 sorted_by_abbrev[i].sig_type = sig_type;
5144 sorted_by_abbrev[i].abbrev_offset =
5145 read_abbrev_offset (sig_type->per_cu.section,
5146 sig_type->per_cu.offset);
5148 cleanups = make_cleanup (xfree, sorted_by_abbrev);
5149 qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units,
5150 sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset);
5152 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5153 called any number of times, so we don't reset tu_stats here. */
5155 abbrev_offset.sect_off = ~(unsigned) 0;
5156 abbrev_table = NULL;
5157 make_cleanup (abbrev_table_free_cleanup, &abbrev_table);
5159 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
5161 const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i];
5163 /* Switch to the next abbrev table if necessary. */
5164 if (abbrev_table == NULL
5165 || tu->abbrev_offset.sect_off != abbrev_offset.sect_off)
5167 if (abbrev_table != NULL)
5169 abbrev_table_free (abbrev_table);
5170 /* Reset to NULL in case abbrev_table_read_table throws
5171 an error: abbrev_table_free_cleanup will get called. */
5172 abbrev_table = NULL;
5174 abbrev_offset = tu->abbrev_offset;
5176 abbrev_table_read_table (&dwarf2_per_objfile->abbrev,
5178 ++tu_stats->nr_uniq_abbrev_tables;
5181 init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0,
5185 /* Create a vector of pointers to primary type units to make it easy to
5186 iterate over them and CUs. See dw2_get_primary_cu. */
5187 dwarf2_per_objfile->n_type_unit_groups =
5188 htab_elements (dwarf2_per_objfile->type_unit_groups);
5189 dwarf2_per_objfile->all_type_unit_groups =
5190 obstack_alloc (&objfile->objfile_obstack,
5191 dwarf2_per_objfile->n_type_unit_groups
5192 * sizeof (struct type_unit_group *));
5193 iter = &dwarf2_per_objfile->all_type_unit_groups[0];
5194 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
5195 add_type_unit_group_to_table, &iter);
5196 gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0]
5197 == dwarf2_per_objfile->n_type_unit_groups);
5199 do_cleanups (cleanups);
5201 if (dwarf2_read_debug)
5203 fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n");
5204 fprintf_unfiltered (gdb_stdlog, " %d TUs\n",
5205 dwarf2_per_objfile->n_type_units);
5206 fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n",
5207 tu_stats->nr_uniq_abbrev_tables);
5208 fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n",
5209 tu_stats->nr_symtabs);
5210 fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n",
5211 tu_stats->nr_symtab_sharers);
5212 fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n",
5213 tu_stats->nr_stmt_less_type_units);
5217 /* Partial symbol tables. */
5219 /* Create a psymtab named NAME and assign it to PER_CU.
5221 The caller must fill in the following details:
5222 dirname, textlow, texthigh. */
5224 static struct partial_symtab *
5225 create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
5227 struct objfile *objfile = per_cu->objfile;
5228 struct partial_symtab *pst;
5230 pst = start_psymtab_common (objfile, objfile->section_offsets,
5232 objfile->global_psymbols.next,
5233 objfile->static_psymbols.next);
5235 pst->psymtabs_addrmap_supported = 1;
5237 /* This is the glue that links PST into GDB's symbol API. */
5238 pst->read_symtab_private = per_cu;
5239 pst->read_symtab = dwarf2_read_symtab;
5240 per_cu->v.psymtab = pst;
5245 /* die_reader_func for process_psymtab_comp_unit. */
5248 process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
5250 struct die_info *comp_unit_die,
5254 struct dwarf2_cu *cu = reader->cu;
5255 struct objfile *objfile = cu->objfile;
5256 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
5257 struct attribute *attr;
5259 CORE_ADDR best_lowpc = 0, best_highpc = 0;
5260 struct partial_symtab *pst;
5262 const char *filename;
5263 int *want_partial_unit_ptr = data;
5265 if (comp_unit_die->tag == DW_TAG_partial_unit
5266 && (want_partial_unit_ptr == NULL
5267 || !*want_partial_unit_ptr))
5270 gdb_assert (! per_cu->is_debug_types);
5272 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
5274 cu->list_in_scope = &file_symbols;
5276 /* Allocate a new partial symbol table structure. */
5277 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
5278 if (attr == NULL || !DW_STRING (attr))
5281 filename = DW_STRING (attr);
5283 pst = create_partial_symtab (per_cu, filename);
5285 /* This must be done before calling dwarf2_build_include_psymtabs. */
5286 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
5288 pst->dirname = DW_STRING (attr);
5290 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5292 dwarf2_find_base_address (comp_unit_die, cu);
5294 /* Possibly set the default values of LOWPC and HIGHPC from
5296 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
5297 &best_highpc, cu, pst);
5298 if (has_pc_info == 1 && best_lowpc < best_highpc)
5299 /* Store the contiguous range if it is not empty; it can be empty for
5300 CUs with no code. */
5301 addrmap_set_empty (objfile->psymtabs_addrmap,
5302 best_lowpc + baseaddr,
5303 best_highpc + baseaddr - 1, pst);
5305 /* Check if comp unit has_children.
5306 If so, read the rest of the partial symbols from this comp unit.
5307 If not, there's no more debug_info for this comp unit. */
5310 struct partial_die_info *first_die;
5311 CORE_ADDR lowpc, highpc;
5313 lowpc = ((CORE_ADDR) -1);
5314 highpc = ((CORE_ADDR) 0);
5316 first_die = load_partial_dies (reader, info_ptr, 1);
5318 scan_partial_symbols (first_die, &lowpc, &highpc,
5321 /* If we didn't find a lowpc, set it to highpc to avoid
5322 complaints from `maint check'. */
5323 if (lowpc == ((CORE_ADDR) -1))
5326 /* If the compilation unit didn't have an explicit address range,
5327 then use the information extracted from its child dies. */
5331 best_highpc = highpc;
5334 pst->textlow = best_lowpc + baseaddr;
5335 pst->texthigh = best_highpc + baseaddr;
5337 pst->n_global_syms = objfile->global_psymbols.next -
5338 (objfile->global_psymbols.list + pst->globals_offset);
5339 pst->n_static_syms = objfile->static_psymbols.next -
5340 (objfile->static_psymbols.list + pst->statics_offset);
5341 sort_pst_symbols (objfile, pst);
5343 if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs))
5346 int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
5347 struct dwarf2_per_cu_data *iter;
5349 /* Fill in 'dependencies' here; we fill in 'users' in a
5351 pst->number_of_dependencies = len;
5352 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
5353 len * sizeof (struct symtab *));
5355 VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
5358 pst->dependencies[i] = iter->v.psymtab;
5360 VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
5363 /* Get the list of files included in the current compilation unit,
5364 and build a psymtab for each of them. */
5365 dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
5367 if (dwarf2_read_debug)
5369 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5371 fprintf_unfiltered (gdb_stdlog,
5372 "Psymtab for %s unit @0x%x: %s - %s"
5373 ", %d global, %d static syms\n",
5374 per_cu->is_debug_types ? "type" : "comp",
5375 per_cu->offset.sect_off,
5376 paddress (gdbarch, pst->textlow),
5377 paddress (gdbarch, pst->texthigh),
5378 pst->n_global_syms, pst->n_static_syms);
5382 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5383 Process compilation unit THIS_CU for a psymtab. */
5386 process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
5387 int want_partial_unit)
5389 /* If this compilation unit was already read in, free the
5390 cached copy in order to read it in again. This is
5391 necessary because we skipped some symbols when we first
5392 read in the compilation unit (see load_partial_dies).
5393 This problem could be avoided, but the benefit is unclear. */
5394 if (this_cu->cu != NULL)
5395 free_one_cached_comp_unit (this_cu);
5397 gdb_assert (! this_cu->is_debug_types);
5398 init_cutu_and_read_dies (this_cu, NULL, 0, 0,
5399 process_psymtab_comp_unit_reader,
5400 &want_partial_unit);
5402 /* Age out any secondary CUs. */
5403 age_cached_comp_units ();
5406 /* Reader function for build_type_psymtabs. */
5409 build_type_psymtabs_reader (const struct die_reader_specs *reader,
5411 struct die_info *type_unit_die,
5415 struct objfile *objfile = dwarf2_per_objfile->objfile;
5416 struct dwarf2_cu *cu = reader->cu;
5417 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
5418 struct type_unit_group *tu_group;
5419 struct attribute *attr;
5420 struct partial_die_info *first_die;
5421 CORE_ADDR lowpc, highpc;
5422 struct partial_symtab *pst;
5424 gdb_assert (data == NULL);
5429 attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
5430 tu_group = get_type_unit_group (cu, attr);
5432 VEC_safe_push (dwarf2_per_cu_ptr, tu_group->t.tus, per_cu);
5434 prepare_one_comp_unit (cu, type_unit_die, language_minimal);
5435 cu->list_in_scope = &file_symbols;
5436 pst = create_partial_symtab (per_cu, "");
5439 first_die = load_partial_dies (reader, info_ptr, 1);
5441 lowpc = (CORE_ADDR) -1;
5442 highpc = (CORE_ADDR) 0;
5443 scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu);
5445 pst->n_global_syms = objfile->global_psymbols.next -
5446 (objfile->global_psymbols.list + pst->globals_offset);
5447 pst->n_static_syms = objfile->static_psymbols.next -
5448 (objfile->static_psymbols.list + pst->statics_offset);
5449 sort_pst_symbols (objfile, pst);
5452 /* Traversal function for build_type_psymtabs. */
5455 build_type_psymtab_dependencies (void **slot, void *info)
5457 struct objfile *objfile = dwarf2_per_objfile->objfile;
5458 struct type_unit_group *tu_group = (struct type_unit_group *) *slot;
5459 struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu;
5460 struct partial_symtab *pst = per_cu->v.psymtab;
5461 int len = VEC_length (dwarf2_per_cu_ptr, tu_group->t.tus);
5462 struct dwarf2_per_cu_data *iter;
5465 gdb_assert (len > 0);
5467 pst->number_of_dependencies = len;
5468 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
5469 len * sizeof (struct psymtab *));
5471 VEC_iterate (dwarf2_per_cu_ptr, tu_group->t.tus, i, iter);
5474 pst->dependencies[i] = iter->v.psymtab;
5475 iter->type_unit_group = tu_group;
5478 VEC_free (dwarf2_per_cu_ptr, tu_group->t.tus);
5483 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5484 Build partial symbol tables for the .debug_types comp-units. */
5487 build_type_psymtabs (struct objfile *objfile)
5489 if (! create_all_type_units (objfile))
5492 build_type_unit_groups (build_type_psymtabs_reader, NULL);
5494 /* Now that all TUs have been processed we can fill in the dependencies. */
5495 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
5496 build_type_psymtab_dependencies, NULL);
5499 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5502 psymtabs_addrmap_cleanup (void *o)
5504 struct objfile *objfile = o;
5506 objfile->psymtabs_addrmap = NULL;
5509 /* Compute the 'user' field for each psymtab in OBJFILE. */
5512 set_partial_user (struct objfile *objfile)
5516 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
5518 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
5519 struct partial_symtab *pst = per_cu->v.psymtab;
5525 for (j = 0; j < pst->number_of_dependencies; ++j)
5527 /* Set the 'user' field only if it is not already set. */
5528 if (pst->dependencies[j]->user == NULL)
5529 pst->dependencies[j]->user = pst;
5534 /* Build the partial symbol table by doing a quick pass through the
5535 .debug_info and .debug_abbrev sections. */
5538 dwarf2_build_psymtabs_hard (struct objfile *objfile)
5540 struct cleanup *back_to, *addrmap_cleanup;
5541 struct obstack temp_obstack;
5544 if (dwarf2_read_debug)
5546 fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n",
5550 dwarf2_per_objfile->reading_partial_symbols = 1;
5552 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
5554 /* Any cached compilation units will be linked by the per-objfile
5555 read_in_chain. Make sure to free them when we're done. */
5556 back_to = make_cleanup (free_cached_comp_units, NULL);
5558 build_type_psymtabs (objfile);
5560 create_all_comp_units (objfile);
5562 /* Create a temporary address map on a temporary obstack. We later
5563 copy this to the final obstack. */
5564 obstack_init (&temp_obstack);
5565 make_cleanup_obstack_free (&temp_obstack);
5566 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
5567 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
5569 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
5571 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
5573 process_psymtab_comp_unit (per_cu, 0);
5576 set_partial_user (objfile);
5578 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
5579 &objfile->objfile_obstack);
5580 discard_cleanups (addrmap_cleanup);
5582 do_cleanups (back_to);
5584 if (dwarf2_read_debug)
5585 fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n",
5589 /* die_reader_func for load_partial_comp_unit. */
5592 load_partial_comp_unit_reader (const struct die_reader_specs *reader,
5594 struct die_info *comp_unit_die,
5598 struct dwarf2_cu *cu = reader->cu;
5600 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
5602 /* Check if comp unit has_children.
5603 If so, read the rest of the partial symbols from this comp unit.
5604 If not, there's no more debug_info for this comp unit. */
5606 load_partial_dies (reader, info_ptr, 0);
5609 /* Load the partial DIEs for a secondary CU into memory.
5610 This is also used when rereading a primary CU with load_all_dies. */
5613 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
5615 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
5616 load_partial_comp_unit_reader, NULL);
5620 read_comp_units_from_section (struct objfile *objfile,
5621 struct dwarf2_section_info *section,
5622 unsigned int is_dwz,
5625 struct dwarf2_per_cu_data ***all_comp_units)
5628 bfd *abfd = section->asection->owner;
5630 dwarf2_read_section (objfile, section);
5632 info_ptr = section->buffer;
5634 while (info_ptr < section->buffer + section->size)
5636 unsigned int length, initial_length_size;
5637 struct dwarf2_per_cu_data *this_cu;
5640 offset.sect_off = info_ptr - section->buffer;
5642 /* Read just enough information to find out where the next
5643 compilation unit is. */
5644 length = read_initial_length (abfd, info_ptr, &initial_length_size);
5646 /* Save the compilation unit for later lookup. */
5647 this_cu = obstack_alloc (&objfile->objfile_obstack,
5648 sizeof (struct dwarf2_per_cu_data));
5649 memset (this_cu, 0, sizeof (*this_cu));
5650 this_cu->offset = offset;
5651 this_cu->length = length + initial_length_size;
5652 this_cu->is_dwz = is_dwz;
5653 this_cu->objfile = objfile;
5654 this_cu->section = section;
5656 if (*n_comp_units == *n_allocated)
5659 *all_comp_units = xrealloc (*all_comp_units,
5661 * sizeof (struct dwarf2_per_cu_data *));
5663 (*all_comp_units)[*n_comp_units] = this_cu;
5666 info_ptr = info_ptr + this_cu->length;
5670 /* Create a list of all compilation units in OBJFILE.
5671 This is only done for -readnow and building partial symtabs. */
5674 create_all_comp_units (struct objfile *objfile)
5678 struct dwarf2_per_cu_data **all_comp_units;
5682 all_comp_units = xmalloc (n_allocated
5683 * sizeof (struct dwarf2_per_cu_data *));
5685 read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0,
5686 &n_allocated, &n_comp_units, &all_comp_units);
5688 if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL)
5690 struct dwz_file *dwz = dwarf2_get_dwz_file ();
5692 read_comp_units_from_section (objfile, &dwz->info, 1,
5693 &n_allocated, &n_comp_units,
5697 dwarf2_per_objfile->all_comp_units
5698 = obstack_alloc (&objfile->objfile_obstack,
5699 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
5700 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
5701 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
5702 xfree (all_comp_units);
5703 dwarf2_per_objfile->n_comp_units = n_comp_units;
5706 /* Process all loaded DIEs for compilation unit CU, starting at
5707 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5708 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5709 DW_AT_ranges). If NEED_PC is set, then this function will set
5710 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5711 and record the covered ranges in the addrmap. */
5714 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
5715 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
5717 struct partial_die_info *pdi;
5719 /* Now, march along the PDI's, descending into ones which have
5720 interesting children but skipping the children of the other ones,
5721 until we reach the end of the compilation unit. */
5727 fixup_partial_die (pdi, cu);
5729 /* Anonymous namespaces or modules have no name but have interesting
5730 children, so we need to look at them. Ditto for anonymous
5733 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
5734 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type
5735 || pdi->tag == DW_TAG_imported_unit)
5739 case DW_TAG_subprogram:
5740 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
5742 case DW_TAG_constant:
5743 case DW_TAG_variable:
5744 case DW_TAG_typedef:
5745 case DW_TAG_union_type:
5746 if (!pdi->is_declaration)
5748 add_partial_symbol (pdi, cu);
5751 case DW_TAG_class_type:
5752 case DW_TAG_interface_type:
5753 case DW_TAG_structure_type:
5754 if (!pdi->is_declaration)
5756 add_partial_symbol (pdi, cu);
5759 case DW_TAG_enumeration_type:
5760 if (!pdi->is_declaration)
5761 add_partial_enumeration (pdi, cu);
5763 case DW_TAG_base_type:
5764 case DW_TAG_subrange_type:
5765 /* File scope base type definitions are added to the partial
5767 add_partial_symbol (pdi, cu);
5769 case DW_TAG_namespace:
5770 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
5773 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
5775 case DW_TAG_imported_unit:
5777 struct dwarf2_per_cu_data *per_cu;
5779 /* For now we don't handle imported units in type units. */
5780 if (cu->per_cu->is_debug_types)
5782 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5783 " supported in type units [in module %s]"),
5787 per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset,
5791 /* Go read the partial unit, if needed. */
5792 if (per_cu->v.psymtab == NULL)
5793 process_psymtab_comp_unit (per_cu, 1);
5795 VEC_safe_push (dwarf2_per_cu_ptr,
5796 cu->per_cu->imported_symtabs, per_cu);
5804 /* If the die has a sibling, skip to the sibling. */
5806 pdi = pdi->die_sibling;
5810 /* Functions used to compute the fully scoped name of a partial DIE.
5812 Normally, this is simple. For C++, the parent DIE's fully scoped
5813 name is concatenated with "::" and the partial DIE's name. For
5814 Java, the same thing occurs except that "." is used instead of "::".
5815 Enumerators are an exception; they use the scope of their parent
5816 enumeration type, i.e. the name of the enumeration type is not
5817 prepended to the enumerator.
5819 There are two complexities. One is DW_AT_specification; in this
5820 case "parent" means the parent of the target of the specification,
5821 instead of the direct parent of the DIE. The other is compilers
5822 which do not emit DW_TAG_namespace; in this case we try to guess
5823 the fully qualified name of structure types from their members'
5824 linkage names. This must be done using the DIE's children rather
5825 than the children of any DW_AT_specification target. We only need
5826 to do this for structures at the top level, i.e. if the target of
5827 any DW_AT_specification (if any; otherwise the DIE itself) does not
5830 /* Compute the scope prefix associated with PDI's parent, in
5831 compilation unit CU. The result will be allocated on CU's
5832 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5833 field. NULL is returned if no prefix is necessary. */
5835 partial_die_parent_scope (struct partial_die_info *pdi,
5836 struct dwarf2_cu *cu)
5838 const char *grandparent_scope;
5839 struct partial_die_info *parent, *real_pdi;
5841 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5842 then this means the parent of the specification DIE. */
5845 while (real_pdi->has_specification)
5846 real_pdi = find_partial_die (real_pdi->spec_offset,
5847 real_pdi->spec_is_dwz, cu);
5849 parent = real_pdi->die_parent;
5853 if (parent->scope_set)
5854 return parent->scope;
5856 fixup_partial_die (parent, cu);
5858 grandparent_scope = partial_die_parent_scope (parent, cu);
5860 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5861 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5862 Work around this problem here. */
5863 if (cu->language == language_cplus
5864 && parent->tag == DW_TAG_namespace
5865 && strcmp (parent->name, "::") == 0
5866 && grandparent_scope == NULL)
5868 parent->scope = NULL;
5869 parent->scope_set = 1;
5873 if (pdi->tag == DW_TAG_enumerator)
5874 /* Enumerators should not get the name of the enumeration as a prefix. */
5875 parent->scope = grandparent_scope;
5876 else if (parent->tag == DW_TAG_namespace
5877 || parent->tag == DW_TAG_module
5878 || parent->tag == DW_TAG_structure_type
5879 || parent->tag == DW_TAG_class_type
5880 || parent->tag == DW_TAG_interface_type
5881 || parent->tag == DW_TAG_union_type
5882 || parent->tag == DW_TAG_enumeration_type)
5884 if (grandparent_scope == NULL)
5885 parent->scope = parent->name;
5887 parent->scope = typename_concat (&cu->comp_unit_obstack,
5889 parent->name, 0, cu);
5893 /* FIXME drow/2004-04-01: What should we be doing with
5894 function-local names? For partial symbols, we should probably be
5896 complaint (&symfile_complaints,
5897 _("unhandled containing DIE tag %d for DIE at %d"),
5898 parent->tag, pdi->offset.sect_off);
5899 parent->scope = grandparent_scope;
5902 parent->scope_set = 1;
5903 return parent->scope;
5906 /* Return the fully scoped name associated with PDI, from compilation unit
5907 CU. The result will be allocated with malloc. */
5910 partial_die_full_name (struct partial_die_info *pdi,
5911 struct dwarf2_cu *cu)
5913 const char *parent_scope;
5915 /* If this is a template instantiation, we can not work out the
5916 template arguments from partial DIEs. So, unfortunately, we have
5917 to go through the full DIEs. At least any work we do building
5918 types here will be reused if full symbols are loaded later. */
5919 if (pdi->has_template_arguments)
5921 fixup_partial_die (pdi, cu);
5923 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
5925 struct die_info *die;
5926 struct attribute attr;
5927 struct dwarf2_cu *ref_cu = cu;
5929 /* DW_FORM_ref_addr is using section offset. */
5931 attr.form = DW_FORM_ref_addr;
5932 attr.u.unsnd = pdi->offset.sect_off;
5933 die = follow_die_ref (NULL, &attr, &ref_cu);
5935 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
5939 parent_scope = partial_die_parent_scope (pdi, cu);
5940 if (parent_scope == NULL)
5943 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
5947 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
5949 struct objfile *objfile = cu->objfile;
5951 const char *actual_name = NULL;
5953 char *built_actual_name;
5955 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5957 built_actual_name = partial_die_full_name (pdi, cu);
5958 if (built_actual_name != NULL)
5959 actual_name = built_actual_name;
5961 if (actual_name == NULL)
5962 actual_name = pdi->name;
5966 case DW_TAG_subprogram:
5967 if (pdi->is_external || cu->language == language_ada)
5969 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5970 of the global scope. But in Ada, we want to be able to access
5971 nested procedures globally. So all Ada subprograms are stored
5972 in the global scope. */
5973 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5974 mst_text, objfile); */
5975 add_psymbol_to_list (actual_name, strlen (actual_name),
5976 built_actual_name != NULL,
5977 VAR_DOMAIN, LOC_BLOCK,
5978 &objfile->global_psymbols,
5979 0, pdi->lowpc + baseaddr,
5980 cu->language, objfile);
5984 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5985 mst_file_text, objfile); */
5986 add_psymbol_to_list (actual_name, strlen (actual_name),
5987 built_actual_name != NULL,
5988 VAR_DOMAIN, LOC_BLOCK,
5989 &objfile->static_psymbols,
5990 0, pdi->lowpc + baseaddr,
5991 cu->language, objfile);
5994 case DW_TAG_constant:
5996 struct psymbol_allocation_list *list;
5998 if (pdi->is_external)
5999 list = &objfile->global_psymbols;
6001 list = &objfile->static_psymbols;
6002 add_psymbol_to_list (actual_name, strlen (actual_name),
6003 built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC,
6004 list, 0, 0, cu->language, objfile);
6007 case DW_TAG_variable:
6009 addr = decode_locdesc (pdi->d.locdesc, cu);
6013 && !dwarf2_per_objfile->has_section_at_zero)
6015 /* A global or static variable may also have been stripped
6016 out by the linker if unused, in which case its address
6017 will be nullified; do not add such variables into partial
6018 symbol table then. */
6020 else if (pdi->is_external)
6023 Don't enter into the minimal symbol tables as there is
6024 a minimal symbol table entry from the ELF symbols already.
6025 Enter into partial symbol table if it has a location
6026 descriptor or a type.
6027 If the location descriptor is missing, new_symbol will create
6028 a LOC_UNRESOLVED symbol, the address of the variable will then
6029 be determined from the minimal symbol table whenever the variable
6031 The address for the partial symbol table entry is not
6032 used by GDB, but it comes in handy for debugging partial symbol
6035 if (pdi->d.locdesc || pdi->has_type)
6036 add_psymbol_to_list (actual_name, strlen (actual_name),
6037 built_actual_name != NULL,
6038 VAR_DOMAIN, LOC_STATIC,
6039 &objfile->global_psymbols,
6041 cu->language, objfile);
6045 /* Static Variable. Skip symbols without location descriptors. */
6046 if (pdi->d.locdesc == NULL)
6048 xfree (built_actual_name);
6051 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6052 mst_file_data, objfile); */
6053 add_psymbol_to_list (actual_name, strlen (actual_name),
6054 built_actual_name != NULL,
6055 VAR_DOMAIN, LOC_STATIC,
6056 &objfile->static_psymbols,
6058 cu->language, objfile);
6061 case DW_TAG_typedef:
6062 case DW_TAG_base_type:
6063 case DW_TAG_subrange_type:
6064 add_psymbol_to_list (actual_name, strlen (actual_name),
6065 built_actual_name != NULL,
6066 VAR_DOMAIN, LOC_TYPEDEF,
6067 &objfile->static_psymbols,
6068 0, (CORE_ADDR) 0, cu->language, objfile);
6070 case DW_TAG_namespace:
6071 add_psymbol_to_list (actual_name, strlen (actual_name),
6072 built_actual_name != NULL,
6073 VAR_DOMAIN, LOC_TYPEDEF,
6074 &objfile->global_psymbols,
6075 0, (CORE_ADDR) 0, cu->language, objfile);
6077 case DW_TAG_class_type:
6078 case DW_TAG_interface_type:
6079 case DW_TAG_structure_type:
6080 case DW_TAG_union_type:
6081 case DW_TAG_enumeration_type:
6082 /* Skip external references. The DWARF standard says in the section
6083 about "Structure, Union, and Class Type Entries": "An incomplete
6084 structure, union or class type is represented by a structure,
6085 union or class entry that does not have a byte size attribute
6086 and that has a DW_AT_declaration attribute." */
6087 if (!pdi->has_byte_size && pdi->is_declaration)
6089 xfree (built_actual_name);
6093 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6094 static vs. global. */
6095 add_psymbol_to_list (actual_name, strlen (actual_name),
6096 built_actual_name != NULL,
6097 STRUCT_DOMAIN, LOC_TYPEDEF,
6098 (cu->language == language_cplus
6099 || cu->language == language_java)
6100 ? &objfile->global_psymbols
6101 : &objfile->static_psymbols,
6102 0, (CORE_ADDR) 0, cu->language, objfile);
6105 case DW_TAG_enumerator:
6106 add_psymbol_to_list (actual_name, strlen (actual_name),
6107 built_actual_name != NULL,
6108 VAR_DOMAIN, LOC_CONST,
6109 (cu->language == language_cplus
6110 || cu->language == language_java)
6111 ? &objfile->global_psymbols
6112 : &objfile->static_psymbols,
6113 0, (CORE_ADDR) 0, cu->language, objfile);
6119 xfree (built_actual_name);
6122 /* Read a partial die corresponding to a namespace; also, add a symbol
6123 corresponding to that namespace to the symbol table. NAMESPACE is
6124 the name of the enclosing namespace. */
6127 add_partial_namespace (struct partial_die_info *pdi,
6128 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6129 int need_pc, struct dwarf2_cu *cu)
6131 /* Add a symbol for the namespace. */
6133 add_partial_symbol (pdi, cu);
6135 /* Now scan partial symbols in that namespace. */
6137 if (pdi->has_children)
6138 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
6141 /* Read a partial die corresponding to a Fortran module. */
6144 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
6145 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
6147 /* Now scan partial symbols in that module. */
6149 if (pdi->has_children)
6150 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
6153 /* Read a partial die corresponding to a subprogram and create a partial
6154 symbol for that subprogram. When the CU language allows it, this
6155 routine also defines a partial symbol for each nested subprogram
6156 that this subprogram contains.
6158 DIE my also be a lexical block, in which case we simply search
6159 recursively for suprograms defined inside that lexical block.
6160 Again, this is only performed when the CU language allows this
6161 type of definitions. */
6164 add_partial_subprogram (struct partial_die_info *pdi,
6165 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6166 int need_pc, struct dwarf2_cu *cu)
6168 if (pdi->tag == DW_TAG_subprogram)
6170 if (pdi->has_pc_info)
6172 if (pdi->lowpc < *lowpc)
6173 *lowpc = pdi->lowpc;
6174 if (pdi->highpc > *highpc)
6175 *highpc = pdi->highpc;
6179 struct objfile *objfile = cu->objfile;
6181 baseaddr = ANOFFSET (objfile->section_offsets,
6182 SECT_OFF_TEXT (objfile));
6183 addrmap_set_empty (objfile->psymtabs_addrmap,
6184 pdi->lowpc + baseaddr,
6185 pdi->highpc - 1 + baseaddr,
6186 cu->per_cu->v.psymtab);
6190 if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined))
6192 if (!pdi->is_declaration)
6193 /* Ignore subprogram DIEs that do not have a name, they are
6194 illegal. Do not emit a complaint at this point, we will
6195 do so when we convert this psymtab into a symtab. */
6197 add_partial_symbol (pdi, cu);
6201 if (! pdi->has_children)
6204 if (cu->language == language_ada)
6206 pdi = pdi->die_child;
6209 fixup_partial_die (pdi, cu);
6210 if (pdi->tag == DW_TAG_subprogram
6211 || pdi->tag == DW_TAG_lexical_block)
6212 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
6213 pdi = pdi->die_sibling;
6218 /* Read a partial die corresponding to an enumeration type. */
6221 add_partial_enumeration (struct partial_die_info *enum_pdi,
6222 struct dwarf2_cu *cu)
6224 struct partial_die_info *pdi;
6226 if (enum_pdi->name != NULL)
6227 add_partial_symbol (enum_pdi, cu);
6229 pdi = enum_pdi->die_child;
6232 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
6233 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6235 add_partial_symbol (pdi, cu);
6236 pdi = pdi->die_sibling;
6240 /* Return the initial uleb128 in the die at INFO_PTR. */
6243 peek_abbrev_code (bfd *abfd, gdb_byte *info_ptr)
6245 unsigned int bytes_read;
6247 return read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6250 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6251 Return the corresponding abbrev, or NULL if the number is zero (indicating
6252 an empty DIE). In either case *BYTES_READ will be set to the length of
6253 the initial number. */
6255 static struct abbrev_info *
6256 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
6257 struct dwarf2_cu *cu)
6259 bfd *abfd = cu->objfile->obfd;
6260 unsigned int abbrev_number;
6261 struct abbrev_info *abbrev;
6263 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
6265 if (abbrev_number == 0)
6268 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
6271 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6272 abbrev_number, bfd_get_filename (abfd));
6278 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6279 Returns a pointer to the end of a series of DIEs, terminated by an empty
6280 DIE. Any children of the skipped DIEs will also be skipped. */
6283 skip_children (const struct die_reader_specs *reader, gdb_byte *info_ptr)
6285 struct dwarf2_cu *cu = reader->cu;
6286 struct abbrev_info *abbrev;
6287 unsigned int bytes_read;
6291 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6293 return info_ptr + bytes_read;
6295 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
6299 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6300 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6301 abbrev corresponding to that skipped uleb128 should be passed in
6302 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6306 skip_one_die (const struct die_reader_specs *reader, gdb_byte *info_ptr,
6307 struct abbrev_info *abbrev)
6309 unsigned int bytes_read;
6310 struct attribute attr;
6311 bfd *abfd = reader->abfd;
6312 struct dwarf2_cu *cu = reader->cu;
6313 gdb_byte *buffer = reader->buffer;
6314 const gdb_byte *buffer_end = reader->buffer_end;
6315 gdb_byte *start_info_ptr = info_ptr;
6316 unsigned int form, i;
6318 for (i = 0; i < abbrev->num_attrs; i++)
6320 /* The only abbrev we care about is DW_AT_sibling. */
6321 if (abbrev->attrs[i].name == DW_AT_sibling)
6323 read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
6324 if (attr.form == DW_FORM_ref_addr)
6325 complaint (&symfile_complaints,
6326 _("ignoring absolute DW_AT_sibling"));
6328 return buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
6331 /* If it isn't DW_AT_sibling, skip this attribute. */
6332 form = abbrev->attrs[i].form;
6336 case DW_FORM_ref_addr:
6337 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6338 and later it is offset sized. */
6339 if (cu->header.version == 2)
6340 info_ptr += cu->header.addr_size;
6342 info_ptr += cu->header.offset_size;
6344 case DW_FORM_GNU_ref_alt:
6345 info_ptr += cu->header.offset_size;
6348 info_ptr += cu->header.addr_size;
6355 case DW_FORM_flag_present:
6367 case DW_FORM_ref_sig8:
6370 case DW_FORM_string:
6371 read_direct_string (abfd, info_ptr, &bytes_read);
6372 info_ptr += bytes_read;
6374 case DW_FORM_sec_offset:
6376 case DW_FORM_GNU_strp_alt:
6377 info_ptr += cu->header.offset_size;
6379 case DW_FORM_exprloc:
6381 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6382 info_ptr += bytes_read;
6384 case DW_FORM_block1:
6385 info_ptr += 1 + read_1_byte (abfd, info_ptr);
6387 case DW_FORM_block2:
6388 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
6390 case DW_FORM_block4:
6391 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
6395 case DW_FORM_ref_udata:
6396 case DW_FORM_GNU_addr_index:
6397 case DW_FORM_GNU_str_index:
6398 info_ptr = (gdb_byte *) safe_skip_leb128 (info_ptr, buffer_end);
6400 case DW_FORM_indirect:
6401 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6402 info_ptr += bytes_read;
6403 /* We need to continue parsing from here, so just go back to
6405 goto skip_attribute;
6408 error (_("Dwarf Error: Cannot handle %s "
6409 "in DWARF reader [in module %s]"),
6410 dwarf_form_name (form),
6411 bfd_get_filename (abfd));
6415 if (abbrev->has_children)
6416 return skip_children (reader, info_ptr);
6421 /* Locate ORIG_PDI's sibling.
6422 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6425 locate_pdi_sibling (const struct die_reader_specs *reader,
6426 struct partial_die_info *orig_pdi,
6429 /* Do we know the sibling already? */
6431 if (orig_pdi->sibling)
6432 return orig_pdi->sibling;
6434 /* Are there any children to deal with? */
6436 if (!orig_pdi->has_children)
6439 /* Skip the children the long way. */
6441 return skip_children (reader, info_ptr);
6444 /* Expand this partial symbol table into a full symbol table. SELF is
6448 dwarf2_read_symtab (struct partial_symtab *self,
6449 struct objfile *objfile)
6453 warning (_("bug: psymtab for %s is already read in."),
6460 printf_filtered (_("Reading in symbols for %s..."),
6462 gdb_flush (gdb_stdout);
6465 /* Restore our global data. */
6466 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
6468 /* If this psymtab is constructed from a debug-only objfile, the
6469 has_section_at_zero flag will not necessarily be correct. We
6470 can get the correct value for this flag by looking at the data
6471 associated with the (presumably stripped) associated objfile. */
6472 if (objfile->separate_debug_objfile_backlink)
6474 struct dwarf2_per_objfile *dpo_backlink
6475 = objfile_data (objfile->separate_debug_objfile_backlink,
6476 dwarf2_objfile_data_key);
6478 dwarf2_per_objfile->has_section_at_zero
6479 = dpo_backlink->has_section_at_zero;
6482 dwarf2_per_objfile->reading_partial_symbols = 0;
6484 psymtab_to_symtab_1 (self);
6486 /* Finish up the debug error message. */
6488 printf_filtered (_("done.\n"));
6491 process_cu_includes ();
6494 /* Reading in full CUs. */
6496 /* Add PER_CU to the queue. */
6499 queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
6500 enum language pretend_language)
6502 struct dwarf2_queue_item *item;
6505 item = xmalloc (sizeof (*item));
6506 item->per_cu = per_cu;
6507 item->pretend_language = pretend_language;
6510 if (dwarf2_queue == NULL)
6511 dwarf2_queue = item;
6513 dwarf2_queue_tail->next = item;
6515 dwarf2_queue_tail = item;
6518 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6519 unit and add it to our queue.
6520 The result is non-zero if PER_CU was queued, otherwise the result is zero
6521 meaning either PER_CU is already queued or it is already loaded. */
6524 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
6525 struct dwarf2_per_cu_data *per_cu,
6526 enum language pretend_language)
6528 /* We may arrive here during partial symbol reading, if we need full
6529 DIEs to process an unusual case (e.g. template arguments). Do
6530 not queue PER_CU, just tell our caller to load its DIEs. */
6531 if (dwarf2_per_objfile->reading_partial_symbols)
6533 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
6538 /* Mark the dependence relation so that we don't flush PER_CU
6540 dwarf2_add_dependence (this_cu, per_cu);
6542 /* If it's already on the queue, we have nothing to do. */
6546 /* If the compilation unit is already loaded, just mark it as
6548 if (per_cu->cu != NULL)
6550 per_cu->cu->last_used = 0;
6554 /* Add it to the queue. */
6555 queue_comp_unit (per_cu, pretend_language);
6560 /* Process the queue. */
6563 process_queue (void)
6565 struct dwarf2_queue_item *item, *next_item;
6567 if (dwarf2_read_debug)
6569 fprintf_unfiltered (gdb_stdlog,
6570 "Expanding one or more symtabs of objfile %s ...\n",
6571 dwarf2_per_objfile->objfile->name);
6574 /* The queue starts out with one item, but following a DIE reference
6575 may load a new CU, adding it to the end of the queue. */
6576 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
6578 if (dwarf2_per_objfile->using_index
6579 ? !item->per_cu->v.quick->symtab
6580 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
6582 struct dwarf2_per_cu_data *per_cu = item->per_cu;
6584 if (dwarf2_read_debug)
6586 fprintf_unfiltered (gdb_stdlog,
6587 "Expanding symtab of %s at offset 0x%x\n",
6588 per_cu->is_debug_types ? "TU" : "CU",
6589 per_cu->offset.sect_off);
6592 if (per_cu->is_debug_types)
6593 process_full_type_unit (per_cu, item->pretend_language);
6595 process_full_comp_unit (per_cu, item->pretend_language);
6597 if (dwarf2_read_debug)
6599 fprintf_unfiltered (gdb_stdlog,
6600 "Done expanding %s at offset 0x%x\n",
6601 per_cu->is_debug_types ? "TU" : "CU",
6602 per_cu->offset.sect_off);
6606 item->per_cu->queued = 0;
6607 next_item = item->next;
6611 dwarf2_queue_tail = NULL;
6613 if (dwarf2_read_debug)
6615 fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n",
6616 dwarf2_per_objfile->objfile->name);
6620 /* Free all allocated queue entries. This function only releases anything if
6621 an error was thrown; if the queue was processed then it would have been
6622 freed as we went along. */
6625 dwarf2_release_queue (void *dummy)
6627 struct dwarf2_queue_item *item, *last;
6629 item = dwarf2_queue;
6632 /* Anything still marked queued is likely to be in an
6633 inconsistent state, so discard it. */
6634 if (item->per_cu->queued)
6636 if (item->per_cu->cu != NULL)
6637 free_one_cached_comp_unit (item->per_cu);
6638 item->per_cu->queued = 0;
6646 dwarf2_queue = dwarf2_queue_tail = NULL;
6649 /* Read in full symbols for PST, and anything it depends on. */
6652 psymtab_to_symtab_1 (struct partial_symtab *pst)
6654 struct dwarf2_per_cu_data *per_cu;
6660 for (i = 0; i < pst->number_of_dependencies; i++)
6661 if (!pst->dependencies[i]->readin
6662 && pst->dependencies[i]->user == NULL)
6664 /* Inform about additional files that need to be read in. */
6667 /* FIXME: i18n: Need to make this a single string. */
6668 fputs_filtered (" ", gdb_stdout);
6670 fputs_filtered ("and ", gdb_stdout);
6672 printf_filtered ("%s...", pst->dependencies[i]->filename);
6673 wrap_here (""); /* Flush output. */
6674 gdb_flush (gdb_stdout);
6676 psymtab_to_symtab_1 (pst->dependencies[i]);
6679 per_cu = pst->read_symtab_private;
6683 /* It's an include file, no symbols to read for it.
6684 Everything is in the parent symtab. */
6689 dw2_do_instantiate_symtab (per_cu);
6692 /* Trivial hash function for die_info: the hash value of a DIE
6693 is its offset in .debug_info for this objfile. */
6696 die_hash (const void *item)
6698 const struct die_info *die = item;
6700 return die->offset.sect_off;
6703 /* Trivial comparison function for die_info structures: two DIEs
6704 are equal if they have the same offset. */
6707 die_eq (const void *item_lhs, const void *item_rhs)
6709 const struct die_info *die_lhs = item_lhs;
6710 const struct die_info *die_rhs = item_rhs;
6712 return die_lhs->offset.sect_off == die_rhs->offset.sect_off;
6715 /* die_reader_func for load_full_comp_unit.
6716 This is identical to read_signatured_type_reader,
6717 but is kept separate for now. */
6720 load_full_comp_unit_reader (const struct die_reader_specs *reader,
6722 struct die_info *comp_unit_die,
6726 struct dwarf2_cu *cu = reader->cu;
6727 enum language *language_ptr = data;
6729 gdb_assert (cu->die_hash == NULL);
6731 htab_create_alloc_ex (cu->header.length / 12,
6735 &cu->comp_unit_obstack,
6736 hashtab_obstack_allocate,
6737 dummy_obstack_deallocate);
6740 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
6741 &info_ptr, comp_unit_die);
6742 cu->dies = comp_unit_die;
6743 /* comp_unit_die is not stored in die_hash, no need. */
6745 /* We try not to read any attributes in this function, because not
6746 all CUs needed for references have been loaded yet, and symbol
6747 table processing isn't initialized. But we have to set the CU language,
6748 or we won't be able to build types correctly.
6749 Similarly, if we do not read the producer, we can not apply
6750 producer-specific interpretation. */
6751 prepare_one_comp_unit (cu, cu->dies, *language_ptr);
6754 /* Load the DIEs associated with PER_CU into memory. */
6757 load_full_comp_unit (struct dwarf2_per_cu_data *this_cu,
6758 enum language pretend_language)
6760 gdb_assert (! this_cu->is_debug_types);
6762 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
6763 load_full_comp_unit_reader, &pretend_language);
6766 /* Add a DIE to the delayed physname list. */
6769 add_to_method_list (struct type *type, int fnfield_index, int index,
6770 const char *name, struct die_info *die,
6771 struct dwarf2_cu *cu)
6773 struct delayed_method_info mi;
6775 mi.fnfield_index = fnfield_index;
6779 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
6782 /* A cleanup for freeing the delayed method list. */
6785 free_delayed_list (void *ptr)
6787 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
6788 if (cu->method_list != NULL)
6790 VEC_free (delayed_method_info, cu->method_list);
6791 cu->method_list = NULL;
6795 /* Compute the physnames of any methods on the CU's method list.
6797 The computation of method physnames is delayed in order to avoid the
6798 (bad) condition that one of the method's formal parameters is of an as yet
6802 compute_delayed_physnames (struct dwarf2_cu *cu)
6805 struct delayed_method_info *mi;
6806 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
6808 const char *physname;
6809 struct fn_fieldlist *fn_flp
6810 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
6811 physname = dwarf2_physname (mi->name, mi->die, cu);
6812 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
6816 /* Go objects should be embedded in a DW_TAG_module DIE,
6817 and it's not clear if/how imported objects will appear.
6818 To keep Go support simple until that's worked out,
6819 go back through what we've read and create something usable.
6820 We could do this while processing each DIE, and feels kinda cleaner,
6821 but that way is more invasive.
6822 This is to, for example, allow the user to type "p var" or "b main"
6823 without having to specify the package name, and allow lookups
6824 of module.object to work in contexts that use the expression
6828 fixup_go_packaging (struct dwarf2_cu *cu)
6830 char *package_name = NULL;
6831 struct pending *list;
6834 for (list = global_symbols; list != NULL; list = list->next)
6836 for (i = 0; i < list->nsyms; ++i)
6838 struct symbol *sym = list->symbol[i];
6840 if (SYMBOL_LANGUAGE (sym) == language_go
6841 && SYMBOL_CLASS (sym) == LOC_BLOCK)
6843 char *this_package_name = go_symbol_package_name (sym);
6845 if (this_package_name == NULL)
6847 if (package_name == NULL)
6848 package_name = this_package_name;
6851 if (strcmp (package_name, this_package_name) != 0)
6852 complaint (&symfile_complaints,
6853 _("Symtab %s has objects from two different Go packages: %s and %s"),
6854 (SYMBOL_SYMTAB (sym)
6855 ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym))
6856 : cu->objfile->name),
6857 this_package_name, package_name);
6858 xfree (this_package_name);
6864 if (package_name != NULL)
6866 struct objfile *objfile = cu->objfile;
6867 const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack,
6869 strlen (package_name));
6870 struct type *type = init_type (TYPE_CODE_MODULE, 0, 0,
6871 saved_package_name, objfile);
6874 TYPE_TAG_NAME (type) = TYPE_NAME (type);
6876 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
6877 SYMBOL_SET_LANGUAGE (sym, language_go);
6878 SYMBOL_SET_NAMES (sym, saved_package_name,
6879 strlen (saved_package_name), 0, objfile);
6880 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6881 e.g., "main" finds the "main" module and not C's main(). */
6882 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
6883 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
6884 SYMBOL_TYPE (sym) = type;
6886 add_symbol_to_list (sym, &global_symbols);
6888 xfree (package_name);
6892 /* Return the symtab for PER_CU. This works properly regardless of
6893 whether we're using the index or psymtabs. */
6895 static struct symtab *
6896 get_symtab (struct dwarf2_per_cu_data *per_cu)
6898 return (dwarf2_per_objfile->using_index
6899 ? per_cu->v.quick->symtab
6900 : per_cu->v.psymtab->symtab);
6903 /* A helper function for computing the list of all symbol tables
6904 included by PER_CU. */
6907 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result,
6908 htab_t all_children,
6909 struct dwarf2_per_cu_data *per_cu)
6913 struct dwarf2_per_cu_data *iter;
6915 slot = htab_find_slot (all_children, per_cu, INSERT);
6918 /* This inclusion and its children have been processed. */
6923 /* Only add a CU if it has a symbol table. */
6924 if (get_symtab (per_cu) != NULL)
6925 VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu);
6928 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter);
6930 recursively_compute_inclusions (result, all_children, iter);
6933 /* Compute the symtab 'includes' fields for the symtab related to
6937 compute_symtab_includes (struct dwarf2_per_cu_data *per_cu)
6939 gdb_assert (! per_cu->is_debug_types);
6941 if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs))
6944 struct dwarf2_per_cu_data *iter;
6945 VEC (dwarf2_per_cu_ptr) *result_children = NULL;
6946 htab_t all_children;
6947 struct symtab *symtab = get_symtab (per_cu);
6949 /* If we don't have a symtab, we can just skip this case. */
6953 all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
6954 NULL, xcalloc, xfree);
6957 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs,
6960 recursively_compute_inclusions (&result_children, all_children, iter);
6962 /* Now we have a transitive closure of all the included CUs, and
6963 for .gdb_index version 7 the included TUs, so we can convert it
6964 to a list of symtabs. */
6965 len = VEC_length (dwarf2_per_cu_ptr, result_children);
6967 = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack,
6968 (len + 1) * sizeof (struct symtab *));
6970 VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter);
6972 symtab->includes[ix] = get_symtab (iter);
6973 symtab->includes[len] = NULL;
6975 VEC_free (dwarf2_per_cu_ptr, result_children);
6976 htab_delete (all_children);
6980 /* Compute the 'includes' field for the symtabs of all the CUs we just
6984 process_cu_includes (void)
6987 struct dwarf2_per_cu_data *iter;
6990 VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus,
6994 if (! iter->is_debug_types)
6995 compute_symtab_includes (iter);
6998 VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus);
7001 /* Generate full symbol information for PER_CU, whose DIEs have
7002 already been loaded into memory. */
7005 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
7006 enum language pretend_language)
7008 struct dwarf2_cu *cu = per_cu->cu;
7009 struct objfile *objfile = per_cu->objfile;
7010 CORE_ADDR lowpc, highpc;
7011 struct symtab *symtab;
7012 struct cleanup *back_to, *delayed_list_cleanup;
7014 struct block *static_block;
7016 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7019 back_to = make_cleanup (really_free_pendings, NULL);
7020 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
7022 cu->list_in_scope = &file_symbols;
7024 cu->language = pretend_language;
7025 cu->language_defn = language_def (cu->language);
7027 /* Do line number decoding in read_file_scope () */
7028 process_die (cu->dies, cu);
7030 /* For now fudge the Go package. */
7031 if (cu->language == language_go)
7032 fixup_go_packaging (cu);
7034 /* Now that we have processed all the DIEs in the CU, all the types
7035 should be complete, and it should now be safe to compute all of the
7037 compute_delayed_physnames (cu);
7038 do_cleanups (delayed_list_cleanup);
7040 /* Some compilers don't define a DW_AT_high_pc attribute for the
7041 compilation unit. If the DW_AT_high_pc is missing, synthesize
7042 it, by scanning the DIE's below the compilation unit. */
7043 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
7046 = end_symtab_get_static_block (highpc + baseaddr, objfile, 0,
7047 per_cu->imported_symtabs != NULL);
7049 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7050 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7051 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7052 addrmap to help ensure it has an accurate map of pc values belonging to
7054 dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu);
7056 symtab = end_symtab_from_static_block (static_block, objfile,
7057 SECT_OFF_TEXT (objfile), 0);
7061 int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer);
7063 /* Set symtab language to language from DW_AT_language. If the
7064 compilation is from a C file generated by language preprocessors, do
7065 not set the language if it was already deduced by start_subfile. */
7066 if (!(cu->language == language_c && symtab->language != language_c))
7067 symtab->language = cu->language;
7069 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7070 produce DW_AT_location with location lists but it can be possibly
7071 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7072 there were bugs in prologue debug info, fixed later in GCC-4.5
7073 by "unwind info for epilogues" patch (which is not directly related).
7075 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7076 needed, it would be wrong due to missing DW_AT_producer there.
7078 Still one can confuse GDB by using non-standard GCC compilation
7079 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7081 if (cu->has_loclist && gcc_4_minor >= 5)
7082 symtab->locations_valid = 1;
7084 if (gcc_4_minor >= 5)
7085 symtab->epilogue_unwind_valid = 1;
7087 symtab->call_site_htab = cu->call_site_htab;
7090 if (dwarf2_per_objfile->using_index)
7091 per_cu->v.quick->symtab = symtab;
7094 struct partial_symtab *pst = per_cu->v.psymtab;
7095 pst->symtab = symtab;
7099 /* Push it for inclusion processing later. */
7100 VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu);
7102 do_cleanups (back_to);
7105 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7106 already been loaded into memory. */
7109 process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
7110 enum language pretend_language)
7112 struct dwarf2_cu *cu = per_cu->cu;
7113 struct objfile *objfile = per_cu->objfile;
7114 struct symtab *symtab;
7115 struct cleanup *back_to, *delayed_list_cleanup;
7118 back_to = make_cleanup (really_free_pendings, NULL);
7119 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
7121 cu->list_in_scope = &file_symbols;
7123 cu->language = pretend_language;
7124 cu->language_defn = language_def (cu->language);
7126 /* The symbol tables are set up in read_type_unit_scope. */
7127 process_die (cu->dies, cu);
7129 /* For now fudge the Go package. */
7130 if (cu->language == language_go)
7131 fixup_go_packaging (cu);
7133 /* Now that we have processed all the DIEs in the CU, all the types
7134 should be complete, and it should now be safe to compute all of the
7136 compute_delayed_physnames (cu);
7137 do_cleanups (delayed_list_cleanup);
7139 /* TUs share symbol tables.
7140 If this is the first TU to use this symtab, complete the construction
7141 of it with end_expandable_symtab. Otherwise, complete the addition of
7142 this TU's symbols to the existing symtab. */
7143 if (per_cu->type_unit_group->primary_symtab == NULL)
7145 symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
7146 per_cu->type_unit_group->primary_symtab = symtab;
7150 /* Set symtab language to language from DW_AT_language. If the
7151 compilation is from a C file generated by language preprocessors,
7152 do not set the language if it was already deduced by
7154 if (!(cu->language == language_c && symtab->language != language_c))
7155 symtab->language = cu->language;
7160 augment_type_symtab (objfile,
7161 per_cu->type_unit_group->primary_symtab);
7162 symtab = per_cu->type_unit_group->primary_symtab;
7165 if (dwarf2_per_objfile->using_index)
7166 per_cu->v.quick->symtab = symtab;
7169 struct partial_symtab *pst = per_cu->v.psymtab;
7170 pst->symtab = symtab;
7174 do_cleanups (back_to);
7177 /* Process an imported unit DIE. */
7180 process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
7182 struct attribute *attr;
7184 /* For now we don't handle imported units in type units. */
7185 if (cu->per_cu->is_debug_types)
7187 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7188 " supported in type units [in module %s]"),
7192 attr = dwarf2_attr (die, DW_AT_import, cu);
7195 struct dwarf2_per_cu_data *per_cu;
7196 struct symtab *imported_symtab;
7200 offset = dwarf2_get_ref_die_offset (attr);
7201 is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz);
7202 per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile);
7204 /* Queue the unit, if needed. */
7205 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
7206 load_full_comp_unit (per_cu, cu->language);
7208 VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
7213 /* Process a die and its children. */
7216 process_die (struct die_info *die, struct dwarf2_cu *cu)
7220 case DW_TAG_padding:
7222 case DW_TAG_compile_unit:
7223 case DW_TAG_partial_unit:
7224 read_file_scope (die, cu);
7226 case DW_TAG_type_unit:
7227 read_type_unit_scope (die, cu);
7229 case DW_TAG_subprogram:
7230 case DW_TAG_inlined_subroutine:
7231 read_func_scope (die, cu);
7233 case DW_TAG_lexical_block:
7234 case DW_TAG_try_block:
7235 case DW_TAG_catch_block:
7236 read_lexical_block_scope (die, cu);
7238 case DW_TAG_GNU_call_site:
7239 read_call_site_scope (die, cu);
7241 case DW_TAG_class_type:
7242 case DW_TAG_interface_type:
7243 case DW_TAG_structure_type:
7244 case DW_TAG_union_type:
7245 process_structure_scope (die, cu);
7247 case DW_TAG_enumeration_type:
7248 process_enumeration_scope (die, cu);
7251 /* These dies have a type, but processing them does not create
7252 a symbol or recurse to process the children. Therefore we can
7253 read them on-demand through read_type_die. */
7254 case DW_TAG_subroutine_type:
7255 case DW_TAG_set_type:
7256 case DW_TAG_array_type:
7257 case DW_TAG_pointer_type:
7258 case DW_TAG_ptr_to_member_type:
7259 case DW_TAG_reference_type:
7260 case DW_TAG_string_type:
7263 case DW_TAG_base_type:
7264 case DW_TAG_subrange_type:
7265 case DW_TAG_typedef:
7266 /* Add a typedef symbol for the type definition, if it has a
7268 new_symbol (die, read_type_die (die, cu), cu);
7270 case DW_TAG_common_block:
7271 read_common_block (die, cu);
7273 case DW_TAG_common_inclusion:
7275 case DW_TAG_namespace:
7276 cu->processing_has_namespace_info = 1;
7277 read_namespace (die, cu);
7280 cu->processing_has_namespace_info = 1;
7281 read_module (die, cu);
7283 case DW_TAG_imported_declaration:
7284 case DW_TAG_imported_module:
7285 cu->processing_has_namespace_info = 1;
7286 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
7287 || cu->language != language_fortran))
7288 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
7289 dwarf_tag_name (die->tag));
7290 read_import_statement (die, cu);
7293 case DW_TAG_imported_unit:
7294 process_imported_unit_die (die, cu);
7298 new_symbol (die, NULL, cu);
7303 /* DWARF name computation. */
7305 /* A helper function for dwarf2_compute_name which determines whether DIE
7306 needs to have the name of the scope prepended to the name listed in the
7310 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
7312 struct attribute *attr;
7316 case DW_TAG_namespace:
7317 case DW_TAG_typedef:
7318 case DW_TAG_class_type:
7319 case DW_TAG_interface_type:
7320 case DW_TAG_structure_type:
7321 case DW_TAG_union_type:
7322 case DW_TAG_enumeration_type:
7323 case DW_TAG_enumerator:
7324 case DW_TAG_subprogram:
7328 case DW_TAG_variable:
7329 case DW_TAG_constant:
7330 /* We only need to prefix "globally" visible variables. These include
7331 any variable marked with DW_AT_external or any variable that
7332 lives in a namespace. [Variables in anonymous namespaces
7333 require prefixing, but they are not DW_AT_external.] */
7335 if (dwarf2_attr (die, DW_AT_specification, cu))
7337 struct dwarf2_cu *spec_cu = cu;
7339 return die_needs_namespace (die_specification (die, &spec_cu),
7343 attr = dwarf2_attr (die, DW_AT_external, cu);
7344 if (attr == NULL && die->parent->tag != DW_TAG_namespace
7345 && die->parent->tag != DW_TAG_module)
7347 /* A variable in a lexical block of some kind does not need a
7348 namespace, even though in C++ such variables may be external
7349 and have a mangled name. */
7350 if (die->parent->tag == DW_TAG_lexical_block
7351 || die->parent->tag == DW_TAG_try_block
7352 || die->parent->tag == DW_TAG_catch_block
7353 || die->parent->tag == DW_TAG_subprogram)
7362 /* Retrieve the last character from a mem_file. */
7365 do_ui_file_peek_last (void *object, const char *buffer, long length)
7367 char *last_char_p = (char *) object;
7370 *last_char_p = buffer[length - 1];
7373 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7374 compute the physname for the object, which include a method's:
7375 - formal parameters (C++/Java),
7376 - receiver type (Go),
7377 - return type (Java).
7379 The term "physname" is a bit confusing.
7380 For C++, for example, it is the demangled name.
7381 For Go, for example, it's the mangled name.
7383 For Ada, return the DIE's linkage name rather than the fully qualified
7384 name. PHYSNAME is ignored..
7386 The result is allocated on the objfile_obstack and canonicalized. */
7389 dwarf2_compute_name (const char *name,
7390 struct die_info *die, struct dwarf2_cu *cu,
7393 struct objfile *objfile = cu->objfile;
7396 name = dwarf2_name (die, cu);
7398 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7399 compute it by typename_concat inside GDB. */
7400 if (cu->language == language_ada
7401 || (cu->language == language_fortran && physname))
7403 /* For Ada unit, we prefer the linkage name over the name, as
7404 the former contains the exported name, which the user expects
7405 to be able to reference. Ideally, we want the user to be able
7406 to reference this entity using either natural or linkage name,
7407 but we haven't started looking at this enhancement yet. */
7408 struct attribute *attr;
7410 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
7412 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7413 if (attr && DW_STRING (attr))
7414 return DW_STRING (attr);
7417 /* These are the only languages we know how to qualify names in. */
7419 && (cu->language == language_cplus || cu->language == language_java
7420 || cu->language == language_fortran))
7422 if (die_needs_namespace (die, cu))
7426 struct ui_file *buf;
7428 prefix = determine_prefix (die, cu);
7429 buf = mem_fileopen ();
7430 if (*prefix != '\0')
7432 char *prefixed_name = typename_concat (NULL, prefix, name,
7435 fputs_unfiltered (prefixed_name, buf);
7436 xfree (prefixed_name);
7439 fputs_unfiltered (name, buf);
7441 /* Template parameters may be specified in the DIE's DW_AT_name, or
7442 as children with DW_TAG_template_type_param or
7443 DW_TAG_value_type_param. If the latter, add them to the name
7444 here. If the name already has template parameters, then
7445 skip this step; some versions of GCC emit both, and
7446 it is more efficient to use the pre-computed name.
7448 Something to keep in mind about this process: it is very
7449 unlikely, or in some cases downright impossible, to produce
7450 something that will match the mangled name of a function.
7451 If the definition of the function has the same debug info,
7452 we should be able to match up with it anyway. But fallbacks
7453 using the minimal symbol, for instance to find a method
7454 implemented in a stripped copy of libstdc++, will not work.
7455 If we do not have debug info for the definition, we will have to
7456 match them up some other way.
7458 When we do name matching there is a related problem with function
7459 templates; two instantiated function templates are allowed to
7460 differ only by their return types, which we do not add here. */
7462 if (cu->language == language_cplus && strchr (name, '<') == NULL)
7464 struct attribute *attr;
7465 struct die_info *child;
7468 die->building_fullname = 1;
7470 for (child = die->child; child != NULL; child = child->sibling)
7475 struct dwarf2_locexpr_baton *baton;
7478 if (child->tag != DW_TAG_template_type_param
7479 && child->tag != DW_TAG_template_value_param)
7484 fputs_unfiltered ("<", buf);
7488 fputs_unfiltered (", ", buf);
7490 attr = dwarf2_attr (child, DW_AT_type, cu);
7493 complaint (&symfile_complaints,
7494 _("template parameter missing DW_AT_type"));
7495 fputs_unfiltered ("UNKNOWN_TYPE", buf);
7498 type = die_type (child, cu);
7500 if (child->tag == DW_TAG_template_type_param)
7502 c_print_type (type, "", buf, -1, 0, &type_print_raw_options);
7506 attr = dwarf2_attr (child, DW_AT_const_value, cu);
7509 complaint (&symfile_complaints,
7510 _("template parameter missing "
7511 "DW_AT_const_value"));
7512 fputs_unfiltered ("UNKNOWN_VALUE", buf);
7516 dwarf2_const_value_attr (attr, type, name,
7517 &cu->comp_unit_obstack, cu,
7518 &value, &bytes, &baton);
7520 if (TYPE_NOSIGN (type))
7521 /* GDB prints characters as NUMBER 'CHAR'. If that's
7522 changed, this can use value_print instead. */
7523 c_printchar (value, type, buf);
7526 struct value_print_options opts;
7529 v = dwarf2_evaluate_loc_desc (type, NULL,
7533 else if (bytes != NULL)
7535 v = allocate_value (type);
7536 memcpy (value_contents_writeable (v), bytes,
7537 TYPE_LENGTH (type));
7540 v = value_from_longest (type, value);
7542 /* Specify decimal so that we do not depend on
7544 get_formatted_print_options (&opts, 'd');
7546 value_print (v, buf, &opts);
7552 die->building_fullname = 0;
7556 /* Close the argument list, with a space if necessary
7557 (nested templates). */
7558 char last_char = '\0';
7559 ui_file_put (buf, do_ui_file_peek_last, &last_char);
7560 if (last_char == '>')
7561 fputs_unfiltered (" >", buf);
7563 fputs_unfiltered (">", buf);
7567 /* For Java and C++ methods, append formal parameter type
7568 information, if PHYSNAME. */
7570 if (physname && die->tag == DW_TAG_subprogram
7571 && (cu->language == language_cplus
7572 || cu->language == language_java))
7574 struct type *type = read_type_die (die, cu);
7576 c_type_print_args (type, buf, 1, cu->language,
7577 &type_print_raw_options);
7579 if (cu->language == language_java)
7581 /* For java, we must append the return type to method
7583 if (die->tag == DW_TAG_subprogram)
7584 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
7585 0, 0, &type_print_raw_options);
7587 else if (cu->language == language_cplus)
7589 /* Assume that an artificial first parameter is
7590 "this", but do not crash if it is not. RealView
7591 marks unnamed (and thus unused) parameters as
7592 artificial; there is no way to differentiate
7594 if (TYPE_NFIELDS (type) > 0
7595 && TYPE_FIELD_ARTIFICIAL (type, 0)
7596 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
7597 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type,
7599 fputs_unfiltered (" const", buf);
7603 name = ui_file_obsavestring (buf, &objfile->objfile_obstack,
7605 ui_file_delete (buf);
7607 if (cu->language == language_cplus)
7610 = dwarf2_canonicalize_name (name, cu,
7611 &objfile->objfile_obstack);
7622 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7623 If scope qualifiers are appropriate they will be added. The result
7624 will be allocated on the objfile_obstack, or NULL if the DIE does
7625 not have a name. NAME may either be from a previous call to
7626 dwarf2_name or NULL.
7628 The output string will be canonicalized (if C++/Java). */
7631 dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu)
7633 return dwarf2_compute_name (name, die, cu, 0);
7636 /* Construct a physname for the given DIE in CU. NAME may either be
7637 from a previous call to dwarf2_name or NULL. The result will be
7638 allocated on the objfile_objstack or NULL if the DIE does not have a
7641 The output string will be canonicalized (if C++/Java). */
7644 dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu)
7646 struct objfile *objfile = cu->objfile;
7647 struct attribute *attr;
7648 const char *retval, *mangled = NULL, *canon = NULL;
7649 struct cleanup *back_to;
7652 /* In this case dwarf2_compute_name is just a shortcut not building anything
7654 if (!die_needs_namespace (die, cu))
7655 return dwarf2_compute_name (name, die, cu, 1);
7657 back_to = make_cleanup (null_cleanup, NULL);
7659 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
7661 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7663 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7665 if (attr && DW_STRING (attr))
7669 mangled = DW_STRING (attr);
7671 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7672 type. It is easier for GDB users to search for such functions as
7673 `name(params)' than `long name(params)'. In such case the minimal
7674 symbol names do not match the full symbol names but for template
7675 functions there is never a need to look up their definition from their
7676 declaration so the only disadvantage remains the minimal symbol
7677 variant `long name(params)' does not have the proper inferior type.
7680 if (cu->language == language_go)
7682 /* This is a lie, but we already lie to the caller new_symbol_full.
7683 new_symbol_full assumes we return the mangled name.
7684 This just undoes that lie until things are cleaned up. */
7689 demangled = cplus_demangle (mangled,
7690 (DMGL_PARAMS | DMGL_ANSI
7691 | (cu->language == language_java
7692 ? DMGL_JAVA | DMGL_RET_POSTFIX
7697 make_cleanup (xfree, demangled);
7707 if (canon == NULL || check_physname)
7709 const char *physname = dwarf2_compute_name (name, die, cu, 1);
7711 if (canon != NULL && strcmp (physname, canon) != 0)
7713 /* It may not mean a bug in GDB. The compiler could also
7714 compute DW_AT_linkage_name incorrectly. But in such case
7715 GDB would need to be bug-to-bug compatible. */
7717 complaint (&symfile_complaints,
7718 _("Computed physname <%s> does not match demangled <%s> "
7719 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7720 physname, canon, mangled, die->offset.sect_off, objfile->name);
7722 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7723 is available here - over computed PHYSNAME. It is safer
7724 against both buggy GDB and buggy compilers. */
7738 retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval));
7740 do_cleanups (back_to);
7744 /* Read the import statement specified by the given die and record it. */
7747 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
7749 struct objfile *objfile = cu->objfile;
7750 struct attribute *import_attr;
7751 struct die_info *imported_die, *child_die;
7752 struct dwarf2_cu *imported_cu;
7753 const char *imported_name;
7754 const char *imported_name_prefix;
7755 const char *canonical_name;
7756 const char *import_alias;
7757 const char *imported_declaration = NULL;
7758 const char *import_prefix;
7759 VEC (const_char_ptr) *excludes = NULL;
7760 struct cleanup *cleanups;
7762 import_attr = dwarf2_attr (die, DW_AT_import, cu);
7763 if (import_attr == NULL)
7765 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
7766 dwarf_tag_name (die->tag));
7771 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
7772 imported_name = dwarf2_name (imported_die, imported_cu);
7773 if (imported_name == NULL)
7775 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7777 The import in the following code:
7791 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7792 <52> DW_AT_decl_file : 1
7793 <53> DW_AT_decl_line : 6
7794 <54> DW_AT_import : <0x75>
7795 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7797 <5b> DW_AT_decl_file : 1
7798 <5c> DW_AT_decl_line : 2
7799 <5d> DW_AT_type : <0x6e>
7801 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7802 <76> DW_AT_byte_size : 4
7803 <77> DW_AT_encoding : 5 (signed)
7805 imports the wrong die ( 0x75 instead of 0x58 ).
7806 This case will be ignored until the gcc bug is fixed. */
7810 /* Figure out the local name after import. */
7811 import_alias = dwarf2_name (die, cu);
7813 /* Figure out where the statement is being imported to. */
7814 import_prefix = determine_prefix (die, cu);
7816 /* Figure out what the scope of the imported die is and prepend it
7817 to the name of the imported die. */
7818 imported_name_prefix = determine_prefix (imported_die, imported_cu);
7820 if (imported_die->tag != DW_TAG_namespace
7821 && imported_die->tag != DW_TAG_module)
7823 imported_declaration = imported_name;
7824 canonical_name = imported_name_prefix;
7826 else if (strlen (imported_name_prefix) > 0)
7827 canonical_name = obconcat (&objfile->objfile_obstack,
7828 imported_name_prefix, "::", imported_name,
7831 canonical_name = imported_name;
7833 cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes);
7835 if (die->tag == DW_TAG_imported_module && cu->language == language_fortran)
7836 for (child_die = die->child; child_die && child_die->tag;
7837 child_die = sibling_die (child_die))
7839 /* DWARF-4: A Fortran use statement with a “rename list” may be
7840 represented by an imported module entry with an import attribute
7841 referring to the module and owned entries corresponding to those
7842 entities that are renamed as part of being imported. */
7844 if (child_die->tag != DW_TAG_imported_declaration)
7846 complaint (&symfile_complaints,
7847 _("child DW_TAG_imported_declaration expected "
7848 "- DIE at 0x%x [in module %s]"),
7849 child_die->offset.sect_off, objfile->name);
7853 import_attr = dwarf2_attr (child_die, DW_AT_import, cu);
7854 if (import_attr == NULL)
7856 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
7857 dwarf_tag_name (child_die->tag));
7862 imported_die = follow_die_ref_or_sig (child_die, import_attr,
7864 imported_name = dwarf2_name (imported_die, imported_cu);
7865 if (imported_name == NULL)
7867 complaint (&symfile_complaints,
7868 _("child DW_TAG_imported_declaration has unknown "
7869 "imported name - DIE at 0x%x [in module %s]"),
7870 child_die->offset.sect_off, objfile->name);
7874 VEC_safe_push (const_char_ptr, excludes, imported_name);
7876 process_die (child_die, cu);
7879 cp_add_using_directive (import_prefix,
7882 imported_declaration,
7885 &objfile->objfile_obstack);
7887 do_cleanups (cleanups);
7890 /* Cleanup function for handle_DW_AT_stmt_list. */
7893 free_cu_line_header (void *arg)
7895 struct dwarf2_cu *cu = arg;
7897 free_line_header (cu->line_header);
7898 cu->line_header = NULL;
7901 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7902 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7903 this, it was first present in GCC release 4.3.0. */
7906 producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu)
7908 if (!cu->checked_producer)
7909 check_producer (cu);
7911 return cu->producer_is_gcc_lt_4_3;
7915 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
7916 const char **name, const char **comp_dir)
7918 struct attribute *attr;
7923 /* Find the filename. Do not use dwarf2_name here, since the filename
7924 is not a source language identifier. */
7925 attr = dwarf2_attr (die, DW_AT_name, cu);
7928 *name = DW_STRING (attr);
7931 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
7933 *comp_dir = DW_STRING (attr);
7934 else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL
7935 && IS_ABSOLUTE_PATH (*name))
7937 char *d = ldirname (*name);
7941 make_cleanup (xfree, d);
7943 if (*comp_dir != NULL)
7945 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7946 directory, get rid of it. */
7947 char *cp = strchr (*comp_dir, ':');
7949 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
7954 *name = "<unknown>";
7957 /* Handle DW_AT_stmt_list for a compilation unit.
7958 DIE is the DW_TAG_compile_unit die for CU.
7959 COMP_DIR is the compilation directory.
7960 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7963 handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu,
7964 const char *comp_dir)
7966 struct attribute *attr;
7968 gdb_assert (! cu->per_cu->is_debug_types);
7970 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
7973 unsigned int line_offset = DW_UNSND (attr);
7974 struct line_header *line_header
7975 = dwarf_decode_line_header (line_offset, cu);
7979 cu->line_header = line_header;
7980 make_cleanup (free_cu_line_header, cu);
7981 dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1);
7986 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7989 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
7991 struct objfile *objfile = dwarf2_per_objfile->objfile;
7992 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
7993 CORE_ADDR lowpc = ((CORE_ADDR) -1);
7994 CORE_ADDR highpc = ((CORE_ADDR) 0);
7995 struct attribute *attr;
7996 const char *name = NULL;
7997 const char *comp_dir = NULL;
7998 struct die_info *child_die;
7999 bfd *abfd = objfile->obfd;
8002 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8004 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
8006 /* If we didn't find a lowpc, set it to highpc to avoid complaints
8007 from finish_block. */
8008 if (lowpc == ((CORE_ADDR) -1))
8013 find_file_and_directory (die, cu, &name, &comp_dir);
8015 prepare_one_comp_unit (cu, die, cu->language);
8017 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
8018 standardised yet. As a workaround for the language detection we fall
8019 back to the DW_AT_producer string. */
8020 if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
8021 cu->language = language_opencl;
8023 /* Similar hack for Go. */
8024 if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL)
8025 set_cu_language (DW_LANG_Go, cu);
8027 dwarf2_start_symtab (cu, name, comp_dir, lowpc);
8029 /* Decode line number information if present. We do this before
8030 processing child DIEs, so that the line header table is available
8031 for DW_AT_decl_file. */
8032 handle_DW_AT_stmt_list (die, cu, comp_dir);
8034 /* Process all dies in compilation unit. */
8035 if (die->child != NULL)
8037 child_die = die->child;
8038 while (child_die && child_die->tag)
8040 process_die (child_die, cu);
8041 child_die = sibling_die (child_die);
8045 /* Decode macro information, if present. Dwarf 2 macro information
8046 refers to information in the line number info statement program
8047 header, so we can only read it if we've read the header
8049 attr = dwarf2_attr (die, DW_AT_GNU_macros, cu);
8050 if (attr && cu->line_header)
8052 if (dwarf2_attr (die, DW_AT_macro_info, cu))
8053 complaint (&symfile_complaints,
8054 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8056 dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1);
8060 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
8061 if (attr && cu->line_header)
8063 unsigned int macro_offset = DW_UNSND (attr);
8065 dwarf_decode_macros (cu, macro_offset, comp_dir, 0);
8069 do_cleanups (back_to);
8072 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8073 Create the set of symtabs used by this TU, or if this TU is sharing
8074 symtabs with another TU and the symtabs have already been created
8075 then restore those symtabs in the line header.
8076 We don't need the pc/line-number mapping for type units. */
8079 setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
8081 struct objfile *objfile = dwarf2_per_objfile->objfile;
8082 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
8083 struct type_unit_group *tu_group;
8085 struct line_header *lh;
8086 struct attribute *attr;
8087 unsigned int i, line_offset;
8089 gdb_assert (per_cu->is_debug_types);
8091 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
8093 /* If we're using .gdb_index (includes -readnow) then
8094 per_cu->s.type_unit_group may not have been set up yet. */
8095 if (per_cu->type_unit_group == NULL)
8096 per_cu->type_unit_group = get_type_unit_group (cu, attr);
8097 tu_group = per_cu->type_unit_group;
8099 /* If we've already processed this stmt_list there's no real need to
8100 do it again, we could fake it and just recreate the part we need
8101 (file name,index -> symtab mapping). If data shows this optimization
8102 is useful we can do it then. */
8103 first_time = tu_group->primary_symtab == NULL;
8105 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8110 line_offset = DW_UNSND (attr);
8111 lh = dwarf_decode_line_header (line_offset, cu);
8116 dwarf2_start_symtab (cu, "", NULL, 0);
8119 gdb_assert (tu_group->symtabs == NULL);
8122 /* Note: The primary symtab will get allocated at the end. */
8126 cu->line_header = lh;
8127 make_cleanup (free_cu_line_header, cu);
8131 dwarf2_start_symtab (cu, "", NULL, 0);
8133 tu_group->num_symtabs = lh->num_file_names;
8134 tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names);
8136 for (i = 0; i < lh->num_file_names; ++i)
8139 struct file_entry *fe = &lh->file_names[i];
8142 dir = lh->include_dirs[fe->dir_index - 1];
8143 dwarf2_start_subfile (fe->name, dir, NULL);
8145 /* Note: We don't have to watch for the main subfile here, type units
8146 don't have DW_AT_name. */
8148 if (current_subfile->symtab == NULL)
8150 /* NOTE: start_subfile will recognize when it's been passed
8151 a file it has already seen. So we can't assume there's a
8152 simple mapping from lh->file_names to subfiles,
8153 lh->file_names may contain dups. */
8154 current_subfile->symtab = allocate_symtab (current_subfile->name,
8158 fe->symtab = current_subfile->symtab;
8159 tu_group->symtabs[i] = fe->symtab;
8166 for (i = 0; i < lh->num_file_names; ++i)
8168 struct file_entry *fe = &lh->file_names[i];
8170 fe->symtab = tu_group->symtabs[i];
8174 /* The main symtab is allocated last. Type units don't have DW_AT_name
8175 so they don't have a "real" (so to speak) symtab anyway.
8176 There is later code that will assign the main symtab to all symbols
8177 that don't have one. We need to handle the case of a symbol with a
8178 missing symtab (DW_AT_decl_file) anyway. */
8181 /* Process DW_TAG_type_unit.
8182 For TUs we want to skip the first top level sibling if it's not the
8183 actual type being defined by this TU. In this case the first top
8184 level sibling is there to provide context only. */
8187 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
8189 struct die_info *child_die;
8191 prepare_one_comp_unit (cu, die, language_minimal);
8193 /* Initialize (or reinitialize) the machinery for building symtabs.
8194 We do this before processing child DIEs, so that the line header table
8195 is available for DW_AT_decl_file. */
8196 setup_type_unit_groups (die, cu);
8198 if (die->child != NULL)
8200 child_die = die->child;
8201 while (child_die && child_die->tag)
8203 process_die (child_die, cu);
8204 child_die = sibling_die (child_die);
8211 http://gcc.gnu.org/wiki/DebugFission
8212 http://gcc.gnu.org/wiki/DebugFissionDWP
8214 To simplify handling of both DWO files ("object" files with the DWARF info)
8215 and DWP files (a file with the DWOs packaged up into one file), we treat
8216 DWP files as having a collection of virtual DWO files. */
8219 hash_dwo_file (const void *item)
8221 const struct dwo_file *dwo_file = item;
8223 return htab_hash_string (dwo_file->name);
8227 eq_dwo_file (const void *item_lhs, const void *item_rhs)
8229 const struct dwo_file *lhs = item_lhs;
8230 const struct dwo_file *rhs = item_rhs;
8232 return strcmp (lhs->name, rhs->name) == 0;
8235 /* Allocate a hash table for DWO files. */
8238 allocate_dwo_file_hash_table (void)
8240 struct objfile *objfile = dwarf2_per_objfile->objfile;
8242 return htab_create_alloc_ex (41,
8246 &objfile->objfile_obstack,
8247 hashtab_obstack_allocate,
8248 dummy_obstack_deallocate);
8251 /* Lookup DWO file DWO_NAME. */
8254 lookup_dwo_file_slot (const char *dwo_name)
8256 struct dwo_file find_entry;
8259 if (dwarf2_per_objfile->dwo_files == NULL)
8260 dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table ();
8262 memset (&find_entry, 0, sizeof (find_entry));
8263 find_entry.name = dwo_name;
8264 slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT);
8270 hash_dwo_unit (const void *item)
8272 const struct dwo_unit *dwo_unit = item;
8274 /* This drops the top 32 bits of the id, but is ok for a hash. */
8275 return dwo_unit->signature;
8279 eq_dwo_unit (const void *item_lhs, const void *item_rhs)
8281 const struct dwo_unit *lhs = item_lhs;
8282 const struct dwo_unit *rhs = item_rhs;
8284 /* The signature is assumed to be unique within the DWO file.
8285 So while object file CU dwo_id's always have the value zero,
8286 that's OK, assuming each object file DWO file has only one CU,
8287 and that's the rule for now. */
8288 return lhs->signature == rhs->signature;
8291 /* Allocate a hash table for DWO CUs,TUs.
8292 There is one of these tables for each of CUs,TUs for each DWO file. */
8295 allocate_dwo_unit_table (struct objfile *objfile)
8297 /* Start out with a pretty small number.
8298 Generally DWO files contain only one CU and maybe some TUs. */
8299 return htab_create_alloc_ex (3,
8303 &objfile->objfile_obstack,
8304 hashtab_obstack_allocate,
8305 dummy_obstack_deallocate);
8308 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8310 struct create_dwo_info_table_data
8312 struct dwo_file *dwo_file;
8316 /* die_reader_func for create_dwo_debug_info_hash_table. */
8319 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs *reader,
8321 struct die_info *comp_unit_die,
8325 struct dwarf2_cu *cu = reader->cu;
8326 struct objfile *objfile = dwarf2_per_objfile->objfile;
8327 sect_offset offset = cu->per_cu->offset;
8328 struct dwarf2_section_info *section = cu->per_cu->section;
8329 struct create_dwo_info_table_data *data = datap;
8330 struct dwo_file *dwo_file = data->dwo_file;
8331 htab_t cu_htab = data->cu_htab;
8333 struct attribute *attr;
8334 struct dwo_unit *dwo_unit;
8336 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
8339 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8340 " its dwo_id [in module %s]"),
8341 offset.sect_off, dwo_file->name);
8345 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
8346 dwo_unit->dwo_file = dwo_file;
8347 dwo_unit->signature = DW_UNSND (attr);
8348 dwo_unit->section = section;
8349 dwo_unit->offset = offset;
8350 dwo_unit->length = cu->per_cu->length;
8352 slot = htab_find_slot (cu_htab, dwo_unit, INSERT);
8353 gdb_assert (slot != NULL);
8356 const struct dwo_unit *dup_dwo_unit = *slot;
8358 complaint (&symfile_complaints,
8359 _("debug entry at offset 0x%x is duplicate to the entry at"
8360 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8361 offset.sect_off, dup_dwo_unit->offset.sect_off,
8362 phex (dwo_unit->signature, sizeof (dwo_unit->signature)),
8368 if (dwarf2_read_debug)
8369 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id 0x%s\n",
8371 phex (dwo_unit->signature,
8372 sizeof (dwo_unit->signature)));
8375 /* Create a hash table to map DWO IDs to their CU entry in
8376 .debug_info.dwo in DWO_FILE.
8377 Note: This function processes DWO files only, not DWP files. */
8380 create_dwo_debug_info_hash_table (struct dwo_file *dwo_file)
8382 struct objfile *objfile = dwarf2_per_objfile->objfile;
8383 struct dwarf2_section_info *section = &dwo_file->sections.info;
8386 gdb_byte *info_ptr, *end_ptr;
8387 struct create_dwo_info_table_data create_dwo_info_table_data;
8389 dwarf2_read_section (objfile, section);
8390 info_ptr = section->buffer;
8392 if (info_ptr == NULL)
8395 /* We can't set abfd until now because the section may be empty or
8396 not present, in which case section->asection will be NULL. */
8397 abfd = section->asection->owner;
8399 if (dwarf2_read_debug)
8400 fprintf_unfiltered (gdb_stdlog, "Reading .debug_info.dwo for %s:\n",
8401 bfd_get_filename (abfd));
8403 cu_htab = allocate_dwo_unit_table (objfile);
8405 create_dwo_info_table_data.dwo_file = dwo_file;
8406 create_dwo_info_table_data.cu_htab = cu_htab;
8408 end_ptr = info_ptr + section->size;
8409 while (info_ptr < end_ptr)
8411 struct dwarf2_per_cu_data per_cu;
8413 memset (&per_cu, 0, sizeof (per_cu));
8414 per_cu.objfile = objfile;
8415 per_cu.is_debug_types = 0;
8416 per_cu.offset.sect_off = info_ptr - section->buffer;
8417 per_cu.section = section;
8419 init_cutu_and_read_dies_no_follow (&per_cu,
8420 &dwo_file->sections.abbrev,
8422 create_dwo_debug_info_hash_table_reader,
8423 &create_dwo_info_table_data);
8425 info_ptr += per_cu.length;
8431 /* DWP file .debug_{cu,tu}_index section format:
8432 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8434 Both index sections have the same format, and serve to map a 64-bit
8435 signature to a set of section numbers. Each section begins with a header,
8436 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8437 indexes, and a pool of 32-bit section numbers. The index sections will be
8438 aligned at 8-byte boundaries in the file.
8440 The index section header contains two unsigned 32-bit values (using the
8441 byte order of the application binary):
8443 N, the number of compilation units or type units in the index
8444 M, the number of slots in the hash table
8446 (We assume that N and M will not exceed 2^32 - 1.)
8448 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8450 The hash table begins at offset 8 in the section, and consists of an array
8451 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8452 order of the application binary). Unused slots in the hash table are 0.
8453 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8455 The parallel table begins immediately after the hash table
8456 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8457 array of 32-bit indexes (using the byte order of the application binary),
8458 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8459 table contains a 32-bit index into the pool of section numbers. For unused
8460 hash table slots, the corresponding entry in the parallel table will be 0.
8462 Given a 64-bit compilation unit signature or a type signature S, an entry
8463 in the hash table is located as follows:
8465 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8466 the low-order k bits all set to 1.
8468 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8470 3) If the hash table entry at index H matches the signature, use that
8471 entry. If the hash table entry at index H is unused (all zeroes),
8472 terminate the search: the signature is not present in the table.
8474 4) Let H = (H + H') modulo M. Repeat at Step 3.
8476 Because M > N and H' and M are relatively prime, the search is guaranteed
8477 to stop at an unused slot or find the match.
8479 The pool of section numbers begins immediately following the hash table
8480 (at offset 8 + 12 * M from the beginning of the section). The pool of
8481 section numbers consists of an array of 32-bit words (using the byte order
8482 of the application binary). Each item in the array is indexed starting
8483 from 0. The hash table entry provides the index of the first section
8484 number in the set. Additional section numbers in the set follow, and the
8485 set is terminated by a 0 entry (section number 0 is not used in ELF).
8487 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8488 section must be the first entry in the set, and the .debug_abbrev.dwo must
8489 be the second entry. Other members of the set may follow in any order. */
8491 /* Create a hash table to map DWO IDs to their CU/TU entry in
8492 .debug_{info,types}.dwo in DWP_FILE.
8493 Returns NULL if there isn't one.
8494 Note: This function processes DWP files only, not DWO files. */
8496 static struct dwp_hash_table *
8497 create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types)
8499 struct objfile *objfile = dwarf2_per_objfile->objfile;
8500 bfd *dbfd = dwp_file->dbfd;
8501 char *index_ptr, *index_end;
8502 struct dwarf2_section_info *index;
8503 uint32_t version, nr_units, nr_slots;
8504 struct dwp_hash_table *htab;
8507 index = &dwp_file->sections.tu_index;
8509 index = &dwp_file->sections.cu_index;
8511 if (dwarf2_section_empty_p (index))
8513 dwarf2_read_section (objfile, index);
8515 index_ptr = index->buffer;
8516 index_end = index_ptr + index->size;
8518 version = read_4_bytes (dbfd, index_ptr);
8519 index_ptr += 8; /* Skip the unused word. */
8520 nr_units = read_4_bytes (dbfd, index_ptr);
8522 nr_slots = read_4_bytes (dbfd, index_ptr);
8527 error (_("Dwarf Error: unsupported DWP file version (%u)"
8529 version, dwp_file->name);
8531 if (nr_slots != (nr_slots & -nr_slots))
8533 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8534 " is not power of 2 [in module %s]"),
8535 nr_slots, dwp_file->name);
8538 htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table);
8539 htab->nr_units = nr_units;
8540 htab->nr_slots = nr_slots;
8541 htab->hash_table = index_ptr;
8542 htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots;
8543 htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots;
8548 /* Update SECTIONS with the data from SECTP.
8550 This function is like the other "locate" section routines that are
8551 passed to bfd_map_over_sections, but in this context the sections to
8552 read comes from the DWP hash table, not the full ELF section table.
8554 The result is non-zero for success, or zero if an error was found. */
8557 locate_virtual_dwo_sections (asection *sectp,
8558 struct virtual_dwo_sections *sections)
8560 const struct dwop_section_names *names = &dwop_section_names;
8562 if (section_is_p (sectp->name, &names->abbrev_dwo))
8564 /* There can be only one. */
8565 if (sections->abbrev.asection != NULL)
8567 sections->abbrev.asection = sectp;
8568 sections->abbrev.size = bfd_get_section_size (sectp);
8570 else if (section_is_p (sectp->name, &names->info_dwo)
8571 || section_is_p (sectp->name, &names->types_dwo))
8573 /* There can be only one. */
8574 if (sections->info_or_types.asection != NULL)
8576 sections->info_or_types.asection = sectp;
8577 sections->info_or_types.size = bfd_get_section_size (sectp);
8579 else if (section_is_p (sectp->name, &names->line_dwo))
8581 /* There can be only one. */
8582 if (sections->line.asection != NULL)
8584 sections->line.asection = sectp;
8585 sections->line.size = bfd_get_section_size (sectp);
8587 else if (section_is_p (sectp->name, &names->loc_dwo))
8589 /* There can be only one. */
8590 if (sections->loc.asection != NULL)
8592 sections->loc.asection = sectp;
8593 sections->loc.size = bfd_get_section_size (sectp);
8595 else if (section_is_p (sectp->name, &names->macinfo_dwo))
8597 /* There can be only one. */
8598 if (sections->macinfo.asection != NULL)
8600 sections->macinfo.asection = sectp;
8601 sections->macinfo.size = bfd_get_section_size (sectp);
8603 else if (section_is_p (sectp->name, &names->macro_dwo))
8605 /* There can be only one. */
8606 if (sections->macro.asection != NULL)
8608 sections->macro.asection = sectp;
8609 sections->macro.size = bfd_get_section_size (sectp);
8611 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
8613 /* There can be only one. */
8614 if (sections->str_offsets.asection != NULL)
8616 sections->str_offsets.asection = sectp;
8617 sections->str_offsets.size = bfd_get_section_size (sectp);
8621 /* No other kind of section is valid. */
8628 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8629 HTAB is the hash table from the DWP file.
8630 SECTION_INDEX is the index of the DWO in HTAB. */
8632 static struct dwo_unit *
8633 create_dwo_in_dwp (struct dwp_file *dwp_file,
8634 const struct dwp_hash_table *htab,
8635 uint32_t section_index,
8636 ULONGEST signature, int is_debug_types)
8638 struct objfile *objfile = dwarf2_per_objfile->objfile;
8639 bfd *dbfd = dwp_file->dbfd;
8640 const char *kind = is_debug_types ? "TU" : "CU";
8641 struct dwo_file *dwo_file;
8642 struct dwo_unit *dwo_unit;
8643 struct virtual_dwo_sections sections;
8644 void **dwo_file_slot;
8645 char *virtual_dwo_name;
8646 struct dwarf2_section_info *cutu;
8647 struct cleanup *cleanups;
8650 if (dwarf2_read_debug)
8652 fprintf_unfiltered (gdb_stdlog, "Reading %s %u/0x%s in DWP file: %s\n",
8654 section_index, phex (signature, sizeof (signature)),
8658 /* Fetch the sections of this DWO.
8659 Put a limit on the number of sections we look for so that bad data
8660 doesn't cause us to loop forever. */
8662 #define MAX_NR_DWO_SECTIONS \
8663 (1 /* .debug_info or .debug_types */ \
8664 + 1 /* .debug_abbrev */ \
8665 + 1 /* .debug_line */ \
8666 + 1 /* .debug_loc */ \
8667 + 1 /* .debug_str_offsets */ \
8668 + 1 /* .debug_macro */ \
8669 + 1 /* .debug_macinfo */ \
8670 + 1 /* trailing zero */)
8672 memset (§ions, 0, sizeof (sections));
8673 cleanups = make_cleanup (null_cleanup, 0);
8675 for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i)
8678 uint32_t section_nr =
8681 + (section_index + i) * sizeof (uint32_t));
8683 if (section_nr == 0)
8685 if (section_nr >= dwp_file->num_sections)
8687 error (_("Dwarf Error: bad DWP hash table, section number too large"
8692 sectp = dwp_file->elf_sections[section_nr];
8693 if (! locate_virtual_dwo_sections (sectp, §ions))
8695 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8702 || sections.info_or_types.asection == NULL
8703 || sections.abbrev.asection == NULL)
8705 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8709 if (i == MAX_NR_DWO_SECTIONS)
8711 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8716 /* It's easier for the rest of the code if we fake a struct dwo_file and
8717 have dwo_unit "live" in that. At least for now.
8719 The DWP file can be made up of a random collection of CUs and TUs.
8720 However, for each CU + set of TUs that came from the same original DWO
8721 file, we want to combine them back into a virtual DWO file to save space
8722 (fewer struct dwo_file objects to allocated). Remember that for really
8723 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8726 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8727 sections.abbrev.asection ? sections.abbrev.asection->id : 0,
8728 sections.line.asection ? sections.line.asection->id : 0,
8729 sections.loc.asection ? sections.loc.asection->id : 0,
8730 (sections.str_offsets.asection
8731 ? sections.str_offsets.asection->id
8733 make_cleanup (xfree, virtual_dwo_name);
8734 /* Can we use an existing virtual DWO file? */
8735 dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name);
8736 /* Create one if necessary. */
8737 if (*dwo_file_slot == NULL)
8739 if (dwarf2_read_debug)
8741 fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n",
8744 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
8745 dwo_file->name = obstack_copy0 (&objfile->objfile_obstack,
8747 strlen (virtual_dwo_name));
8748 dwo_file->sections.abbrev = sections.abbrev;
8749 dwo_file->sections.line = sections.line;
8750 dwo_file->sections.loc = sections.loc;
8751 dwo_file->sections.macinfo = sections.macinfo;
8752 dwo_file->sections.macro = sections.macro;
8753 dwo_file->sections.str_offsets = sections.str_offsets;
8754 /* The "str" section is global to the entire DWP file. */
8755 dwo_file->sections.str = dwp_file->sections.str;
8756 /* The info or types section is assigned later to dwo_unit,
8757 there's no need to record it in dwo_file.
8758 Also, we can't simply record type sections in dwo_file because
8759 we record a pointer into the vector in dwo_unit. As we collect more
8760 types we'll grow the vector and eventually have to reallocate space
8761 for it, invalidating all the pointers into the current copy. */
8762 *dwo_file_slot = dwo_file;
8766 if (dwarf2_read_debug)
8768 fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n",
8771 dwo_file = *dwo_file_slot;
8773 do_cleanups (cleanups);
8775 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
8776 dwo_unit->dwo_file = dwo_file;
8777 dwo_unit->signature = signature;
8778 dwo_unit->section = obstack_alloc (&objfile->objfile_obstack,
8779 sizeof (struct dwarf2_section_info));
8780 *dwo_unit->section = sections.info_or_types;
8781 /* offset, length, type_offset_in_tu are set later. */
8786 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8788 static struct dwo_unit *
8789 lookup_dwo_in_dwp (struct dwp_file *dwp_file,
8790 const struct dwp_hash_table *htab,
8791 ULONGEST signature, int is_debug_types)
8793 bfd *dbfd = dwp_file->dbfd;
8794 uint32_t mask = htab->nr_slots - 1;
8795 uint32_t hash = signature & mask;
8796 uint32_t hash2 = ((signature >> 32) & mask) | 1;
8799 struct dwo_unit find_dwo_cu, *dwo_cu;
8801 memset (&find_dwo_cu, 0, sizeof (find_dwo_cu));
8802 find_dwo_cu.signature = signature;
8803 slot = htab_find_slot (dwp_file->loaded_cutus, &find_dwo_cu, INSERT);
8808 /* Use a for loop so that we don't loop forever on bad debug info. */
8809 for (i = 0; i < htab->nr_slots; ++i)
8811 ULONGEST signature_in_table;
8813 signature_in_table =
8814 read_8_bytes (dbfd, htab->hash_table + hash * sizeof (uint64_t));
8815 if (signature_in_table == signature)
8817 uint32_t section_index =
8818 read_4_bytes (dbfd, htab->unit_table + hash * sizeof (uint32_t));
8820 *slot = create_dwo_in_dwp (dwp_file, htab, section_index,
8821 signature, is_debug_types);
8824 if (signature_in_table == 0)
8826 hash = (hash + hash2) & mask;
8829 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8834 /* Subroutine of open_dwop_file to simplify it.
8835 Open the file specified by FILE_NAME and hand it off to BFD for
8836 preliminary analysis. Return a newly initialized bfd *, which
8837 includes a canonicalized copy of FILE_NAME.
8838 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8839 In case of trouble, return NULL.
8840 NOTE: This function is derived from symfile_bfd_open. */
8843 try_open_dwop_file (const char *file_name, int is_dwp)
8847 char *absolute_name;
8849 flags = OPF_TRY_CWD_FIRST;
8851 flags |= OPF_SEARCH_IN_PATH;
8852 desc = openp (debug_file_directory, flags, file_name,
8853 O_RDONLY | O_BINARY, &absolute_name);
8857 sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc);
8860 xfree (absolute_name);
8863 xfree (absolute_name);
8864 bfd_set_cacheable (sym_bfd, 1);
8866 if (!bfd_check_format (sym_bfd, bfd_object))
8868 gdb_bfd_unref (sym_bfd); /* This also closes desc. */
8875 /* Try to open DWO/DWP file FILE_NAME.
8876 COMP_DIR is the DW_AT_comp_dir attribute.
8877 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8878 The result is the bfd handle of the file.
8879 If there is a problem finding or opening the file, return NULL.
8880 Upon success, the canonicalized path of the file is stored in the bfd,
8881 same as symfile_bfd_open. */
8884 open_dwop_file (const char *file_name, const char *comp_dir, int is_dwp)
8888 if (IS_ABSOLUTE_PATH (file_name))
8889 return try_open_dwop_file (file_name, is_dwp);
8891 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8893 if (comp_dir != NULL)
8895 char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL);
8897 /* NOTE: If comp_dir is a relative path, this will also try the
8898 search path, which seems useful. */
8899 abfd = try_open_dwop_file (path_to_try, is_dwp);
8900 xfree (path_to_try);
8905 /* That didn't work, try debug-file-directory, which, despite its name,
8906 is a list of paths. */
8908 if (*debug_file_directory == '\0')
8911 return try_open_dwop_file (file_name, is_dwp);
8914 /* This function is mapped across the sections and remembers the offset and
8915 size of each of the DWO debugging sections we are interested in. */
8918 dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr)
8920 struct dwo_sections *dwo_sections = dwo_sections_ptr;
8921 const struct dwop_section_names *names = &dwop_section_names;
8923 if (section_is_p (sectp->name, &names->abbrev_dwo))
8925 dwo_sections->abbrev.asection = sectp;
8926 dwo_sections->abbrev.size = bfd_get_section_size (sectp);
8928 else if (section_is_p (sectp->name, &names->info_dwo))
8930 dwo_sections->info.asection = sectp;
8931 dwo_sections->info.size = bfd_get_section_size (sectp);
8933 else if (section_is_p (sectp->name, &names->line_dwo))
8935 dwo_sections->line.asection = sectp;
8936 dwo_sections->line.size = bfd_get_section_size (sectp);
8938 else if (section_is_p (sectp->name, &names->loc_dwo))
8940 dwo_sections->loc.asection = sectp;
8941 dwo_sections->loc.size = bfd_get_section_size (sectp);
8943 else if (section_is_p (sectp->name, &names->macinfo_dwo))
8945 dwo_sections->macinfo.asection = sectp;
8946 dwo_sections->macinfo.size = bfd_get_section_size (sectp);
8948 else if (section_is_p (sectp->name, &names->macro_dwo))
8950 dwo_sections->macro.asection = sectp;
8951 dwo_sections->macro.size = bfd_get_section_size (sectp);
8953 else if (section_is_p (sectp->name, &names->str_dwo))
8955 dwo_sections->str.asection = sectp;
8956 dwo_sections->str.size = bfd_get_section_size (sectp);
8958 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
8960 dwo_sections->str_offsets.asection = sectp;
8961 dwo_sections->str_offsets.size = bfd_get_section_size (sectp);
8963 else if (section_is_p (sectp->name, &names->types_dwo))
8965 struct dwarf2_section_info type_section;
8967 memset (&type_section, 0, sizeof (type_section));
8968 type_section.asection = sectp;
8969 type_section.size = bfd_get_section_size (sectp);
8970 VEC_safe_push (dwarf2_section_info_def, dwo_sections->types,
8975 /* Initialize the use of the DWO file specified by DWO_NAME.
8976 The result is NULL if DWO_NAME can't be found. */
8978 static struct dwo_file *
8979 open_and_init_dwo_file (const char *dwo_name, const char *comp_dir)
8981 struct objfile *objfile = dwarf2_per_objfile->objfile;
8982 struct dwo_file *dwo_file;
8984 struct cleanup *cleanups;
8986 dbfd = open_dwop_file (dwo_name, comp_dir, 0);
8989 if (dwarf2_read_debug)
8990 fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name);
8993 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
8994 dwo_file->name = obstack_copy0 (&objfile->objfile_obstack,
8995 dwo_name, strlen (dwo_name));
8996 dwo_file->dbfd = dbfd;
8998 cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file);
9000 bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections);
9002 dwo_file->cus = create_dwo_debug_info_hash_table (dwo_file);
9004 dwo_file->tus = create_debug_types_hash_table (dwo_file,
9005 dwo_file->sections.types);
9007 discard_cleanups (cleanups);
9009 if (dwarf2_read_debug)
9010 fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name);
9015 /* This function is mapped across the sections and remembers the offset and
9016 size of each of the DWP debugging sections we are interested in. */
9019 dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr)
9021 struct dwp_file *dwp_file = dwp_file_ptr;
9022 const struct dwop_section_names *names = &dwop_section_names;
9023 unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
9025 /* Record the ELF section number for later lookup: this is what the
9026 .debug_cu_index,.debug_tu_index tables use. */
9027 gdb_assert (elf_section_nr < dwp_file->num_sections);
9028 dwp_file->elf_sections[elf_section_nr] = sectp;
9030 /* Look for specific sections that we need. */
9031 if (section_is_p (sectp->name, &names->str_dwo))
9033 dwp_file->sections.str.asection = sectp;
9034 dwp_file->sections.str.size = bfd_get_section_size (sectp);
9036 else if (section_is_p (sectp->name, &names->cu_index))
9038 dwp_file->sections.cu_index.asection = sectp;
9039 dwp_file->sections.cu_index.size = bfd_get_section_size (sectp);
9041 else if (section_is_p (sectp->name, &names->tu_index))
9043 dwp_file->sections.tu_index.asection = sectp;
9044 dwp_file->sections.tu_index.size = bfd_get_section_size (sectp);
9048 /* Hash function for dwp_file loaded CUs/TUs. */
9051 hash_dwp_loaded_cutus (const void *item)
9053 const struct dwo_unit *dwo_unit = item;
9055 /* This drops the top 32 bits of the signature, but is ok for a hash. */
9056 return dwo_unit->signature;
9059 /* Equality function for dwp_file loaded CUs/TUs. */
9062 eq_dwp_loaded_cutus (const void *a, const void *b)
9064 const struct dwo_unit *dua = a;
9065 const struct dwo_unit *dub = b;
9067 return dua->signature == dub->signature;
9070 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
9073 allocate_dwp_loaded_cutus_table (struct objfile *objfile)
9075 return htab_create_alloc_ex (3,
9076 hash_dwp_loaded_cutus,
9077 eq_dwp_loaded_cutus,
9079 &objfile->objfile_obstack,
9080 hashtab_obstack_allocate,
9081 dummy_obstack_deallocate);
9084 /* Initialize the use of the DWP file for the current objfile.
9085 By convention the name of the DWP file is ${objfile}.dwp.
9086 The result is NULL if it can't be found. */
9088 static struct dwp_file *
9089 open_and_init_dwp_file (const char *comp_dir)
9091 struct objfile *objfile = dwarf2_per_objfile->objfile;
9092 struct dwp_file *dwp_file;
9095 struct cleanup *cleanups;
9097 dwp_name = xstrprintf ("%s.dwp", dwarf2_per_objfile->objfile->name);
9098 cleanups = make_cleanup (xfree, dwp_name);
9100 dbfd = open_dwop_file (dwp_name, comp_dir, 1);
9103 if (dwarf2_read_debug)
9104 fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name);
9105 do_cleanups (cleanups);
9108 dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file);
9109 dwp_file->name = obstack_copy0 (&objfile->objfile_obstack,
9110 dwp_name, strlen (dwp_name));
9111 dwp_file->dbfd = dbfd;
9112 do_cleanups (cleanups);
9114 cleanups = make_cleanup (free_dwo_file_cleanup, dwp_file);
9116 /* +1: section 0 is unused */
9117 dwp_file->num_sections = bfd_count_sections (dbfd) + 1;
9118 dwp_file->elf_sections =
9119 OBSTACK_CALLOC (&objfile->objfile_obstack,
9120 dwp_file->num_sections, asection *);
9122 bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file);
9124 dwp_file->cus = create_dwp_hash_table (dwp_file, 0);
9126 dwp_file->tus = create_dwp_hash_table (dwp_file, 1);
9128 dwp_file->loaded_cutus = allocate_dwp_loaded_cutus_table (objfile);
9130 discard_cleanups (cleanups);
9132 if (dwarf2_read_debug)
9134 fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name);
9135 fprintf_unfiltered (gdb_stdlog,
9136 " %u CUs, %u TUs\n",
9137 dwp_file->cus ? dwp_file->cus->nr_units : 0,
9138 dwp_file->tus ? dwp_file->tus->nr_units : 0);
9144 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9145 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9146 or in the DWP file for the objfile, referenced by THIS_UNIT.
9147 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9148 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9150 This is called, for example, when wanting to read a variable with a
9151 complex location. Therefore we don't want to do file i/o for every call.
9152 Therefore we don't want to look for a DWO file on every call.
9153 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9154 then we check if we've already seen DWO_NAME, and only THEN do we check
9157 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9158 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9160 static struct dwo_unit *
9161 lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit,
9162 const char *dwo_name, const char *comp_dir,
9163 ULONGEST signature, int is_debug_types)
9165 struct objfile *objfile = dwarf2_per_objfile->objfile;
9166 const char *kind = is_debug_types ? "TU" : "CU";
9167 void **dwo_file_slot;
9168 struct dwo_file *dwo_file;
9169 struct dwp_file *dwp_file;
9171 /* Have we already read SIGNATURE from a DWP file? */
9173 if (! dwarf2_per_objfile->dwp_checked)
9175 dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (comp_dir);
9176 dwarf2_per_objfile->dwp_checked = 1;
9178 dwp_file = dwarf2_per_objfile->dwp_file;
9180 if (dwp_file != NULL)
9182 const struct dwp_hash_table *dwp_htab =
9183 is_debug_types ? dwp_file->tus : dwp_file->cus;
9185 if (dwp_htab != NULL)
9187 struct dwo_unit *dwo_cutu =
9188 lookup_dwo_in_dwp (dwp_file, dwp_htab, signature, is_debug_types);
9190 if (dwo_cutu != NULL)
9192 if (dwarf2_read_debug)
9194 fprintf_unfiltered (gdb_stdlog,
9195 "Virtual DWO %s %s found: @%s\n",
9196 kind, hex_string (signature),
9197 host_address_to_string (dwo_cutu));
9204 /* Have we already seen DWO_NAME? */
9206 dwo_file_slot = lookup_dwo_file_slot (dwo_name);
9207 if (*dwo_file_slot == NULL)
9209 /* Read in the file and build a table of the DWOs it contains. */
9210 *dwo_file_slot = open_and_init_dwo_file (dwo_name, comp_dir);
9212 /* NOTE: This will be NULL if unable to open the file. */
9213 dwo_file = *dwo_file_slot;
9215 if (dwo_file != NULL)
9217 htab_t htab = is_debug_types ? dwo_file->tus : dwo_file->cus;
9221 struct dwo_unit find_dwo_cutu, *dwo_cutu;
9223 memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu));
9224 find_dwo_cutu.signature = signature;
9225 dwo_cutu = htab_find (htab, &find_dwo_cutu);
9227 if (dwo_cutu != NULL)
9229 if (dwarf2_read_debug)
9231 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n",
9232 kind, dwo_name, hex_string (signature),
9233 host_address_to_string (dwo_cutu));
9240 /* We didn't find it. This could mean a dwo_id mismatch, or
9241 someone deleted the DWO/DWP file, or the search path isn't set up
9242 correctly to find the file. */
9244 if (dwarf2_read_debug)
9246 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n",
9247 kind, dwo_name, hex_string (signature));
9250 complaint (&symfile_complaints,
9251 _("Could not find DWO CU referenced by CU at offset 0x%x"
9253 this_unit->offset.sect_off, objfile->name);
9257 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9258 See lookup_dwo_cutu_unit for details. */
9260 static struct dwo_unit *
9261 lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu,
9262 const char *dwo_name, const char *comp_dir,
9265 return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0);
9268 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9269 See lookup_dwo_cutu_unit for details. */
9271 static struct dwo_unit *
9272 lookup_dwo_type_unit (struct signatured_type *this_tu,
9273 const char *dwo_name, const char *comp_dir)
9275 return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1);
9278 /* Free all resources associated with DWO_FILE.
9279 Close the DWO file and munmap the sections.
9280 All memory should be on the objfile obstack. */
9283 free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile)
9286 struct dwarf2_section_info *section;
9288 gdb_bfd_unref (dwo_file->dbfd);
9290 VEC_free (dwarf2_section_info_def, dwo_file->sections.types);
9293 /* Wrapper for free_dwo_file for use in cleanups. */
9296 free_dwo_file_cleanup (void *arg)
9298 struct dwo_file *dwo_file = (struct dwo_file *) arg;
9299 struct objfile *objfile = dwarf2_per_objfile->objfile;
9301 free_dwo_file (dwo_file, objfile);
9304 /* Traversal function for free_dwo_files. */
9307 free_dwo_file_from_slot (void **slot, void *info)
9309 struct dwo_file *dwo_file = (struct dwo_file *) *slot;
9310 struct objfile *objfile = (struct objfile *) info;
9312 free_dwo_file (dwo_file, objfile);
9317 /* Free all resources associated with DWO_FILES. */
9320 free_dwo_files (htab_t dwo_files, struct objfile *objfile)
9322 htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile);
9325 /* Read in various DIEs. */
9327 /* qsort helper for inherit_abstract_dies. */
9330 unsigned_int_compar (const void *ap, const void *bp)
9332 unsigned int a = *(unsigned int *) ap;
9333 unsigned int b = *(unsigned int *) bp;
9335 return (a > b) - (b > a);
9338 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9339 Inherit only the children of the DW_AT_abstract_origin DIE not being
9340 already referenced by DW_AT_abstract_origin from the children of the
9344 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
9346 struct die_info *child_die;
9347 unsigned die_children_count;
9348 /* CU offsets which were referenced by children of the current DIE. */
9349 sect_offset *offsets;
9350 sect_offset *offsets_end, *offsetp;
9351 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9352 struct die_info *origin_die;
9353 /* Iterator of the ORIGIN_DIE children. */
9354 struct die_info *origin_child_die;
9355 struct cleanup *cleanups;
9356 struct attribute *attr;
9357 struct dwarf2_cu *origin_cu;
9358 struct pending **origin_previous_list_in_scope;
9360 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
9364 /* Note that following die references may follow to a die in a
9368 origin_die = follow_die_ref (die, attr, &origin_cu);
9370 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9372 origin_previous_list_in_scope = origin_cu->list_in_scope;
9373 origin_cu->list_in_scope = cu->list_in_scope;
9375 if (die->tag != origin_die->tag
9376 && !(die->tag == DW_TAG_inlined_subroutine
9377 && origin_die->tag == DW_TAG_subprogram))
9378 complaint (&symfile_complaints,
9379 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9380 die->offset.sect_off, origin_die->offset.sect_off);
9382 child_die = die->child;
9383 die_children_count = 0;
9384 while (child_die && child_die->tag)
9386 child_die = sibling_die (child_die);
9387 die_children_count++;
9389 offsets = xmalloc (sizeof (*offsets) * die_children_count);
9390 cleanups = make_cleanup (xfree, offsets);
9392 offsets_end = offsets;
9393 child_die = die->child;
9394 while (child_die && child_die->tag)
9396 /* For each CHILD_DIE, find the corresponding child of
9397 ORIGIN_DIE. If there is more than one layer of
9398 DW_AT_abstract_origin, follow them all; there shouldn't be,
9399 but GCC versions at least through 4.4 generate this (GCC PR
9401 struct die_info *child_origin_die = child_die;
9402 struct dwarf2_cu *child_origin_cu = cu;
9406 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
9410 child_origin_die = follow_die_ref (child_origin_die, attr,
9414 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9415 counterpart may exist. */
9416 if (child_origin_die != child_die)
9418 if (child_die->tag != child_origin_die->tag
9419 && !(child_die->tag == DW_TAG_inlined_subroutine
9420 && child_origin_die->tag == DW_TAG_subprogram))
9421 complaint (&symfile_complaints,
9422 _("Child DIE 0x%x and its abstract origin 0x%x have "
9423 "different tags"), child_die->offset.sect_off,
9424 child_origin_die->offset.sect_off);
9425 if (child_origin_die->parent != origin_die)
9426 complaint (&symfile_complaints,
9427 _("Child DIE 0x%x and its abstract origin 0x%x have "
9428 "different parents"), child_die->offset.sect_off,
9429 child_origin_die->offset.sect_off);
9431 *offsets_end++ = child_origin_die->offset;
9433 child_die = sibling_die (child_die);
9435 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
9436 unsigned_int_compar);
9437 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
9438 if (offsetp[-1].sect_off == offsetp->sect_off)
9439 complaint (&symfile_complaints,
9440 _("Multiple children of DIE 0x%x refer "
9441 "to DIE 0x%x as their abstract origin"),
9442 die->offset.sect_off, offsetp->sect_off);
9445 origin_child_die = origin_die->child;
9446 while (origin_child_die && origin_child_die->tag)
9448 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9449 while (offsetp < offsets_end
9450 && offsetp->sect_off < origin_child_die->offset.sect_off)
9452 if (offsetp >= offsets_end
9453 || offsetp->sect_off > origin_child_die->offset.sect_off)
9455 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9456 process_die (origin_child_die, origin_cu);
9458 origin_child_die = sibling_die (origin_child_die);
9460 origin_cu->list_in_scope = origin_previous_list_in_scope;
9462 do_cleanups (cleanups);
9466 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
9468 struct objfile *objfile = cu->objfile;
9469 struct context_stack *new;
9472 struct die_info *child_die;
9473 struct attribute *attr, *call_line, *call_file;
9476 struct block *block;
9477 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
9478 VEC (symbolp) *template_args = NULL;
9479 struct template_symbol *templ_func = NULL;
9483 /* If we do not have call site information, we can't show the
9484 caller of this inlined function. That's too confusing, so
9485 only use the scope for local variables. */
9486 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
9487 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
9488 if (call_line == NULL || call_file == NULL)
9490 read_lexical_block_scope (die, cu);
9495 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9497 name = dwarf2_name (die, cu);
9499 /* Ignore functions with missing or empty names. These are actually
9500 illegal according to the DWARF standard. */
9503 complaint (&symfile_complaints,
9504 _("missing name for subprogram DIE at %d"),
9505 die->offset.sect_off);
9509 /* Ignore functions with missing or invalid low and high pc attributes. */
9510 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
9512 attr = dwarf2_attr (die, DW_AT_external, cu);
9513 if (!attr || !DW_UNSND (attr))
9514 complaint (&symfile_complaints,
9515 _("cannot get low and high bounds "
9516 "for subprogram DIE at %d"),
9517 die->offset.sect_off);
9524 /* If we have any template arguments, then we must allocate a
9525 different sort of symbol. */
9526 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
9528 if (child_die->tag == DW_TAG_template_type_param
9529 || child_die->tag == DW_TAG_template_value_param)
9531 templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
9532 struct template_symbol);
9533 templ_func->base.is_cplus_template_function = 1;
9538 new = push_context (0, lowpc);
9539 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
9540 (struct symbol *) templ_func);
9542 /* If there is a location expression for DW_AT_frame_base, record
9544 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
9546 dwarf2_symbol_mark_computed (attr, new->name, cu, 1);
9548 cu->list_in_scope = &local_symbols;
9550 if (die->child != NULL)
9552 child_die = die->child;
9553 while (child_die && child_die->tag)
9555 if (child_die->tag == DW_TAG_template_type_param
9556 || child_die->tag == DW_TAG_template_value_param)
9558 struct symbol *arg = new_symbol (child_die, NULL, cu);
9561 VEC_safe_push (symbolp, template_args, arg);
9564 process_die (child_die, cu);
9565 child_die = sibling_die (child_die);
9569 inherit_abstract_dies (die, cu);
9571 /* If we have a DW_AT_specification, we might need to import using
9572 directives from the context of the specification DIE. See the
9573 comment in determine_prefix. */
9574 if (cu->language == language_cplus
9575 && dwarf2_attr (die, DW_AT_specification, cu))
9577 struct dwarf2_cu *spec_cu = cu;
9578 struct die_info *spec_die = die_specification (die, &spec_cu);
9582 child_die = spec_die->child;
9583 while (child_die && child_die->tag)
9585 if (child_die->tag == DW_TAG_imported_module)
9586 process_die (child_die, spec_cu);
9587 child_die = sibling_die (child_die);
9590 /* In some cases, GCC generates specification DIEs that
9591 themselves contain DW_AT_specification attributes. */
9592 spec_die = die_specification (spec_die, &spec_cu);
9596 new = pop_context ();
9597 /* Make a block for the local symbols within. */
9598 block = finish_block (new->name, &local_symbols, new->old_blocks,
9599 lowpc, highpc, objfile);
9601 /* For C++, set the block's scope. */
9602 if ((cu->language == language_cplus || cu->language == language_fortran)
9603 && cu->processing_has_namespace_info)
9604 block_set_scope (block, determine_prefix (die, cu),
9605 &objfile->objfile_obstack);
9607 /* If we have address ranges, record them. */
9608 dwarf2_record_block_ranges (die, block, baseaddr, cu);
9610 /* Attach template arguments to function. */
9611 if (! VEC_empty (symbolp, template_args))
9613 gdb_assert (templ_func != NULL);
9615 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
9616 templ_func->template_arguments
9617 = obstack_alloc (&objfile->objfile_obstack,
9618 (templ_func->n_template_arguments
9619 * sizeof (struct symbol *)));
9620 memcpy (templ_func->template_arguments,
9621 VEC_address (symbolp, template_args),
9622 (templ_func->n_template_arguments * sizeof (struct symbol *)));
9623 VEC_free (symbolp, template_args);
9626 /* In C++, we can have functions nested inside functions (e.g., when
9627 a function declares a class that has methods). This means that
9628 when we finish processing a function scope, we may need to go
9629 back to building a containing block's symbol lists. */
9630 local_symbols = new->locals;
9631 using_directives = new->using_directives;
9633 /* If we've finished processing a top-level function, subsequent
9634 symbols go in the file symbol list. */
9635 if (outermost_context_p ())
9636 cu->list_in_scope = &file_symbols;
9639 /* Process all the DIES contained within a lexical block scope. Start
9640 a new scope, process the dies, and then close the scope. */
9643 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
9645 struct objfile *objfile = cu->objfile;
9646 struct context_stack *new;
9647 CORE_ADDR lowpc, highpc;
9648 struct die_info *child_die;
9651 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9653 /* Ignore blocks with missing or invalid low and high pc attributes. */
9654 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9655 as multiple lexical blocks? Handling children in a sane way would
9656 be nasty. Might be easier to properly extend generic blocks to
9658 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
9663 push_context (0, lowpc);
9664 if (die->child != NULL)
9666 child_die = die->child;
9667 while (child_die && child_die->tag)
9669 process_die (child_die, cu);
9670 child_die = sibling_die (child_die);
9673 new = pop_context ();
9675 if (local_symbols != NULL || using_directives != NULL)
9678 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
9681 /* Note that recording ranges after traversing children, as we
9682 do here, means that recording a parent's ranges entails
9683 walking across all its children's ranges as they appear in
9684 the address map, which is quadratic behavior.
9686 It would be nicer to record the parent's ranges before
9687 traversing its children, simply overriding whatever you find
9688 there. But since we don't even decide whether to create a
9689 block until after we've traversed its children, that's hard
9691 dwarf2_record_block_ranges (die, block, baseaddr, cu);
9693 local_symbols = new->locals;
9694 using_directives = new->using_directives;
9697 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9700 read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu)
9702 struct objfile *objfile = cu->objfile;
9703 struct gdbarch *gdbarch = get_objfile_arch (objfile);
9704 CORE_ADDR pc, baseaddr;
9705 struct attribute *attr;
9706 struct call_site *call_site, call_site_local;
9709 struct die_info *child_die;
9711 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9713 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
9716 complaint (&symfile_complaints,
9717 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9718 "DIE 0x%x [in module %s]"),
9719 die->offset.sect_off, objfile->name);
9722 pc = DW_ADDR (attr) + baseaddr;
9724 if (cu->call_site_htab == NULL)
9725 cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq,
9726 NULL, &objfile->objfile_obstack,
9727 hashtab_obstack_allocate, NULL);
9728 call_site_local.pc = pc;
9729 slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT);
9732 complaint (&symfile_complaints,
9733 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9734 "DIE 0x%x [in module %s]"),
9735 paddress (gdbarch, pc), die->offset.sect_off, objfile->name);
9739 /* Count parameters at the caller. */
9742 for (child_die = die->child; child_die && child_die->tag;
9743 child_die = sibling_die (child_die))
9745 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
9747 complaint (&symfile_complaints,
9748 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9749 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9750 child_die->tag, child_die->offset.sect_off, objfile->name);
9757 call_site = obstack_alloc (&objfile->objfile_obstack,
9758 (sizeof (*call_site)
9759 + (sizeof (*call_site->parameter)
9762 memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter));
9765 if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu))
9767 struct die_info *func_die;
9769 /* Skip also over DW_TAG_inlined_subroutine. */
9770 for (func_die = die->parent;
9771 func_die && func_die->tag != DW_TAG_subprogram
9772 && func_die->tag != DW_TAG_subroutine_type;
9773 func_die = func_die->parent);
9775 /* DW_AT_GNU_all_call_sites is a superset
9776 of DW_AT_GNU_all_tail_call_sites. */
9778 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu)
9779 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu))
9781 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9782 not complete. But keep CALL_SITE for look ups via call_site_htab,
9783 both the initial caller containing the real return address PC and
9784 the final callee containing the current PC of a chain of tail
9785 calls do not need to have the tail call list complete. But any
9786 function candidate for a virtual tail call frame searched via
9787 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9788 determined unambiguously. */
9792 struct type *func_type = NULL;
9795 func_type = get_die_type (func_die, cu);
9796 if (func_type != NULL)
9798 gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC);
9800 /* Enlist this call site to the function. */
9801 call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type);
9802 TYPE_TAIL_CALL_LIST (func_type) = call_site;
9805 complaint (&symfile_complaints,
9806 _("Cannot find function owning DW_TAG_GNU_call_site "
9807 "DIE 0x%x [in module %s]"),
9808 die->offset.sect_off, objfile->name);
9812 attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu);
9814 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
9815 SET_FIELD_DWARF_BLOCK (call_site->target, NULL);
9816 if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0))
9817 /* Keep NULL DWARF_BLOCK. */;
9818 else if (attr_form_is_block (attr))
9820 struct dwarf2_locexpr_baton *dlbaton;
9822 dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton));
9823 dlbaton->data = DW_BLOCK (attr)->data;
9824 dlbaton->size = DW_BLOCK (attr)->size;
9825 dlbaton->per_cu = cu->per_cu;
9827 SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton);
9829 else if (is_ref_attr (attr))
9831 struct dwarf2_cu *target_cu = cu;
9832 struct die_info *target_die;
9834 target_die = follow_die_ref_or_sig (die, attr, &target_cu);
9835 gdb_assert (target_cu->objfile == objfile);
9836 if (die_is_declaration (target_die, target_cu))
9838 const char *target_physname = NULL;
9839 struct attribute *target_attr;
9841 /* Prefer the mangled name; otherwise compute the demangled one. */
9842 target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu);
9843 if (target_attr == NULL)
9844 target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name,
9846 if (target_attr != NULL && DW_STRING (target_attr) != NULL)
9847 target_physname = DW_STRING (target_attr);
9849 target_physname = dwarf2_physname (NULL, target_die, target_cu);
9850 if (target_physname == NULL)
9851 complaint (&symfile_complaints,
9852 _("DW_AT_GNU_call_site_target target DIE has invalid "
9853 "physname, for referencing DIE 0x%x [in module %s]"),
9854 die->offset.sect_off, objfile->name);
9856 SET_FIELD_PHYSNAME (call_site->target, target_physname);
9862 /* DW_AT_entry_pc should be preferred. */
9863 if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL))
9864 complaint (&symfile_complaints,
9865 _("DW_AT_GNU_call_site_target target DIE has invalid "
9866 "low pc, for referencing DIE 0x%x [in module %s]"),
9867 die->offset.sect_off, objfile->name);
9869 SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr);
9873 complaint (&symfile_complaints,
9874 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9875 "block nor reference, for DIE 0x%x [in module %s]"),
9876 die->offset.sect_off, objfile->name);
9878 call_site->per_cu = cu->per_cu;
9880 for (child_die = die->child;
9881 child_die && child_die->tag;
9882 child_die = sibling_die (child_die))
9884 struct call_site_parameter *parameter;
9885 struct attribute *loc, *origin;
9887 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
9889 /* Already printed the complaint above. */
9893 gdb_assert (call_site->parameter_count < nparams);
9894 parameter = &call_site->parameter[call_site->parameter_count];
9896 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9897 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9898 register is contained in DW_AT_GNU_call_site_value. */
9900 loc = dwarf2_attr (child_die, DW_AT_location, cu);
9901 origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
9902 if (loc == NULL && origin != NULL && is_ref_attr (origin))
9906 parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET;
9907 offset = dwarf2_get_ref_die_offset (origin);
9908 if (!offset_in_cu_p (&cu->header, offset))
9910 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9911 binding can be done only inside one CU. Such referenced DIE
9912 therefore cannot be even moved to DW_TAG_partial_unit. */
9913 complaint (&symfile_complaints,
9914 _("DW_AT_abstract_origin offset is not in CU for "
9915 "DW_TAG_GNU_call_site child DIE 0x%x "
9917 child_die->offset.sect_off, objfile->name);
9920 parameter->u.param_offset.cu_off = (offset.sect_off
9921 - cu->header.offset.sect_off);
9923 else if (loc == NULL || origin != NULL || !attr_form_is_block (loc))
9925 complaint (&symfile_complaints,
9926 _("No DW_FORM_block* DW_AT_location for "
9927 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9928 child_die->offset.sect_off, objfile->name);
9933 parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg
9934 (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]);
9935 if (parameter->u.dwarf_reg != -1)
9936 parameter->kind = CALL_SITE_PARAMETER_DWARF_REG;
9937 else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data,
9938 &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size],
9939 ¶meter->u.fb_offset))
9940 parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET;
9943 complaint (&symfile_complaints,
9944 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9945 "for DW_FORM_block* DW_AT_location is supported for "
9946 "DW_TAG_GNU_call_site child DIE 0x%x "
9948 child_die->offset.sect_off, objfile->name);
9953 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu);
9954 if (!attr_form_is_block (attr))
9956 complaint (&symfile_complaints,
9957 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9958 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9959 child_die->offset.sect_off, objfile->name);
9962 parameter->value = DW_BLOCK (attr)->data;
9963 parameter->value_size = DW_BLOCK (attr)->size;
9965 /* Parameters are not pre-cleared by memset above. */
9966 parameter->data_value = NULL;
9967 parameter->data_value_size = 0;
9968 call_site->parameter_count++;
9970 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu);
9973 if (!attr_form_is_block (attr))
9974 complaint (&symfile_complaints,
9975 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9976 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9977 child_die->offset.sect_off, objfile->name);
9980 parameter->data_value = DW_BLOCK (attr)->data;
9981 parameter->data_value_size = DW_BLOCK (attr)->size;
9987 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9988 Return 1 if the attributes are present and valid, otherwise, return 0.
9989 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9992 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
9993 CORE_ADDR *high_return, struct dwarf2_cu *cu,
9994 struct partial_symtab *ranges_pst)
9996 struct objfile *objfile = cu->objfile;
9997 struct comp_unit_head *cu_header = &cu->header;
9998 bfd *obfd = objfile->obfd;
9999 unsigned int addr_size = cu_header->addr_size;
10000 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
10001 /* Base address selection entry. */
10004 unsigned int dummy;
10009 CORE_ADDR high = 0;
10010 CORE_ADDR baseaddr;
10012 found_base = cu->base_known;
10013 base = cu->base_address;
10015 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
10016 if (offset >= dwarf2_per_objfile->ranges.size)
10018 complaint (&symfile_complaints,
10019 _("Offset %d out of bounds for DW_AT_ranges attribute"),
10023 buffer = dwarf2_per_objfile->ranges.buffer + offset;
10025 /* Read in the largest possible address. */
10026 marker = read_address (obfd, buffer, cu, &dummy);
10027 if ((marker & mask) == mask)
10029 /* If we found the largest possible address, then
10030 read the base address. */
10031 base = read_address (obfd, buffer + addr_size, cu, &dummy);
10032 buffer += 2 * addr_size;
10033 offset += 2 * addr_size;
10039 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
10043 CORE_ADDR range_beginning, range_end;
10045 range_beginning = read_address (obfd, buffer, cu, &dummy);
10046 buffer += addr_size;
10047 range_end = read_address (obfd, buffer, cu, &dummy);
10048 buffer += addr_size;
10049 offset += 2 * addr_size;
10051 /* An end of list marker is a pair of zero addresses. */
10052 if (range_beginning == 0 && range_end == 0)
10053 /* Found the end of list entry. */
10056 /* Each base address selection entry is a pair of 2 values.
10057 The first is the largest possible address, the second is
10058 the base address. Check for a base address here. */
10059 if ((range_beginning & mask) == mask)
10061 /* If we found the largest possible address, then
10062 read the base address. */
10063 base = read_address (obfd, buffer + addr_size, cu, &dummy);
10070 /* We have no valid base address for the ranges
10072 complaint (&symfile_complaints,
10073 _("Invalid .debug_ranges data (no base address)"));
10077 if (range_beginning > range_end)
10079 /* Inverted range entries are invalid. */
10080 complaint (&symfile_complaints,
10081 _("Invalid .debug_ranges data (inverted range)"));
10085 /* Empty range entries have no effect. */
10086 if (range_beginning == range_end)
10089 range_beginning += base;
10092 /* A not-uncommon case of bad debug info.
10093 Don't pollute the addrmap with bad data. */
10094 if (range_beginning + baseaddr == 0
10095 && !dwarf2_per_objfile->has_section_at_zero)
10097 complaint (&symfile_complaints,
10098 _(".debug_ranges entry has start address of zero"
10099 " [in module %s]"), objfile->name);
10103 if (ranges_pst != NULL)
10104 addrmap_set_empty (objfile->psymtabs_addrmap,
10105 range_beginning + baseaddr,
10106 range_end - 1 + baseaddr,
10109 /* FIXME: This is recording everything as a low-high
10110 segment of consecutive addresses. We should have a
10111 data structure for discontiguous block ranges
10115 low = range_beginning;
10121 if (range_beginning < low)
10122 low = range_beginning;
10123 if (range_end > high)
10129 /* If the first entry is an end-of-list marker, the range
10130 describes an empty scope, i.e. no instructions. */
10136 *high_return = high;
10140 /* Get low and high pc attributes from a die. Return 1 if the attributes
10141 are present and valid, otherwise, return 0. Return -1 if the range is
10142 discontinuous, i.e. derived from DW_AT_ranges information. */
10145 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
10146 CORE_ADDR *highpc, struct dwarf2_cu *cu,
10147 struct partial_symtab *pst)
10149 struct attribute *attr;
10150 struct attribute *attr_high;
10152 CORE_ADDR high = 0;
10155 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
10158 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10161 low = DW_ADDR (attr);
10162 if (attr_high->form == DW_FORM_addr
10163 || attr_high->form == DW_FORM_GNU_addr_index)
10164 high = DW_ADDR (attr_high);
10166 high = low + DW_UNSND (attr_high);
10169 /* Found high w/o low attribute. */
10172 /* Found consecutive range of addresses. */
10177 attr = dwarf2_attr (die, DW_AT_ranges, cu);
10180 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10181 We take advantage of the fact that DW_AT_ranges does not appear
10182 in DW_TAG_compile_unit of DWO files. */
10183 int need_ranges_base = die->tag != DW_TAG_compile_unit;
10184 unsigned int ranges_offset = (DW_UNSND (attr)
10185 + (need_ranges_base
10189 /* Value of the DW_AT_ranges attribute is the offset in the
10190 .debug_ranges section. */
10191 if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst))
10193 /* Found discontinuous range of addresses. */
10198 /* read_partial_die has also the strict LOW < HIGH requirement. */
10202 /* When using the GNU linker, .gnu.linkonce. sections are used to
10203 eliminate duplicate copies of functions and vtables and such.
10204 The linker will arbitrarily choose one and discard the others.
10205 The AT_*_pc values for such functions refer to local labels in
10206 these sections. If the section from that file was discarded, the
10207 labels are not in the output, so the relocs get a value of 0.
10208 If this is a discarded function, mark the pc bounds as invalid,
10209 so that GDB will ignore it. */
10210 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
10219 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10220 its low and high PC addresses. Do nothing if these addresses could not
10221 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10222 and HIGHPC to the high address if greater than HIGHPC. */
10225 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
10226 CORE_ADDR *lowpc, CORE_ADDR *highpc,
10227 struct dwarf2_cu *cu)
10229 CORE_ADDR low, high;
10230 struct die_info *child = die->child;
10232 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
10234 *lowpc = min (*lowpc, low);
10235 *highpc = max (*highpc, high);
10238 /* If the language does not allow nested subprograms (either inside
10239 subprograms or lexical blocks), we're done. */
10240 if (cu->language != language_ada)
10243 /* Check all the children of the given DIE. If it contains nested
10244 subprograms, then check their pc bounds. Likewise, we need to
10245 check lexical blocks as well, as they may also contain subprogram
10247 while (child && child->tag)
10249 if (child->tag == DW_TAG_subprogram
10250 || child->tag == DW_TAG_lexical_block)
10251 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
10252 child = sibling_die (child);
10256 /* Get the low and high pc's represented by the scope DIE, and store
10257 them in *LOWPC and *HIGHPC. If the correct values can't be
10258 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10261 get_scope_pc_bounds (struct die_info *die,
10262 CORE_ADDR *lowpc, CORE_ADDR *highpc,
10263 struct dwarf2_cu *cu)
10265 CORE_ADDR best_low = (CORE_ADDR) -1;
10266 CORE_ADDR best_high = (CORE_ADDR) 0;
10267 CORE_ADDR current_low, current_high;
10269 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
10271 best_low = current_low;
10272 best_high = current_high;
10276 struct die_info *child = die->child;
10278 while (child && child->tag)
10280 switch (child->tag) {
10281 case DW_TAG_subprogram:
10282 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
10284 case DW_TAG_namespace:
10285 case DW_TAG_module:
10286 /* FIXME: carlton/2004-01-16: Should we do this for
10287 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10288 that current GCC's always emit the DIEs corresponding
10289 to definitions of methods of classes as children of a
10290 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10291 the DIEs giving the declarations, which could be
10292 anywhere). But I don't see any reason why the
10293 standards says that they have to be there. */
10294 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
10296 if (current_low != ((CORE_ADDR) -1))
10298 best_low = min (best_low, current_low);
10299 best_high = max (best_high, current_high);
10307 child = sibling_die (child);
10312 *highpc = best_high;
10315 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10319 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
10320 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
10322 struct objfile *objfile = cu->objfile;
10323 struct attribute *attr;
10324 struct attribute *attr_high;
10326 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
10329 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10332 CORE_ADDR low = DW_ADDR (attr);
10334 if (attr_high->form == DW_FORM_addr
10335 || attr_high->form == DW_FORM_GNU_addr_index)
10336 high = DW_ADDR (attr_high);
10338 high = low + DW_UNSND (attr_high);
10340 record_block_range (block, baseaddr + low, baseaddr + high - 1);
10344 attr = dwarf2_attr (die, DW_AT_ranges, cu);
10347 bfd *obfd = objfile->obfd;
10348 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10349 We take advantage of the fact that DW_AT_ranges does not appear
10350 in DW_TAG_compile_unit of DWO files. */
10351 int need_ranges_base = die->tag != DW_TAG_compile_unit;
10353 /* The value of the DW_AT_ranges attribute is the offset of the
10354 address range list in the .debug_ranges section. */
10355 unsigned long offset = (DW_UNSND (attr)
10356 + (need_ranges_base ? cu->ranges_base : 0));
10357 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
10359 /* For some target architectures, but not others, the
10360 read_address function sign-extends the addresses it returns.
10361 To recognize base address selection entries, we need a
10363 unsigned int addr_size = cu->header.addr_size;
10364 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
10366 /* The base address, to which the next pair is relative. Note
10367 that this 'base' is a DWARF concept: most entries in a range
10368 list are relative, to reduce the number of relocs against the
10369 debugging information. This is separate from this function's
10370 'baseaddr' argument, which GDB uses to relocate debugging
10371 information from a shared library based on the address at
10372 which the library was loaded. */
10373 CORE_ADDR base = cu->base_address;
10374 int base_known = cu->base_known;
10376 gdb_assert (dwarf2_per_objfile->ranges.readin);
10377 if (offset >= dwarf2_per_objfile->ranges.size)
10379 complaint (&symfile_complaints,
10380 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10387 unsigned int bytes_read;
10388 CORE_ADDR start, end;
10390 start = read_address (obfd, buffer, cu, &bytes_read);
10391 buffer += bytes_read;
10392 end = read_address (obfd, buffer, cu, &bytes_read);
10393 buffer += bytes_read;
10395 /* Did we find the end of the range list? */
10396 if (start == 0 && end == 0)
10399 /* Did we find a base address selection entry? */
10400 else if ((start & base_select_mask) == base_select_mask)
10406 /* We found an ordinary address range. */
10411 complaint (&symfile_complaints,
10412 _("Invalid .debug_ranges data "
10413 "(no base address)"));
10419 /* Inverted range entries are invalid. */
10420 complaint (&symfile_complaints,
10421 _("Invalid .debug_ranges data "
10422 "(inverted range)"));
10426 /* Empty range entries have no effect. */
10430 start += base + baseaddr;
10431 end += base + baseaddr;
10433 /* A not-uncommon case of bad debug info.
10434 Don't pollute the addrmap with bad data. */
10435 if (start == 0 && !dwarf2_per_objfile->has_section_at_zero)
10437 complaint (&symfile_complaints,
10438 _(".debug_ranges entry has start address of zero"
10439 " [in module %s]"), objfile->name);
10443 record_block_range (block, start, end - 1);
10449 /* Check whether the producer field indicates either of GCC < 4.6, or the
10450 Intel C/C++ compiler, and cache the result in CU. */
10453 check_producer (struct dwarf2_cu *cu)
10456 int major, minor, release;
10458 if (cu->producer == NULL)
10460 /* For unknown compilers expect their behavior is DWARF version
10463 GCC started to support .debug_types sections by -gdwarf-4 since
10464 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10465 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10466 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10467 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10469 else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0)
10471 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10473 cs = &cu->producer[strlen ("GNU ")];
10474 while (*cs && !isdigit (*cs))
10476 if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3)
10478 /* Not recognized as GCC. */
10482 cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6);
10483 cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3);
10486 else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10487 cu->producer_is_icc = 1;
10490 /* For other non-GCC compilers, expect their behavior is DWARF version
10494 cu->checked_producer = 1;
10497 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10498 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10499 during 4.6.0 experimental. */
10502 producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu)
10504 if (!cu->checked_producer)
10505 check_producer (cu);
10507 return cu->producer_is_gxx_lt_4_6;
10510 /* Return the default accessibility type if it is not overriden by
10511 DW_AT_accessibility. */
10513 static enum dwarf_access_attribute
10514 dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu)
10516 if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu))
10518 /* The default DWARF 2 accessibility for members is public, the default
10519 accessibility for inheritance is private. */
10521 if (die->tag != DW_TAG_inheritance)
10522 return DW_ACCESS_public;
10524 return DW_ACCESS_private;
10528 /* DWARF 3+ defines the default accessibility a different way. The same
10529 rules apply now for DW_TAG_inheritance as for the members and it only
10530 depends on the container kind. */
10532 if (die->parent->tag == DW_TAG_class_type)
10533 return DW_ACCESS_private;
10535 return DW_ACCESS_public;
10539 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10540 offset. If the attribute was not found return 0, otherwise return
10541 1. If it was found but could not properly be handled, set *OFFSET
10545 handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu,
10548 struct attribute *attr;
10550 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
10555 /* Note that we do not check for a section offset first here.
10556 This is because DW_AT_data_member_location is new in DWARF 4,
10557 so if we see it, we can assume that a constant form is really
10558 a constant and not a section offset. */
10559 if (attr_form_is_constant (attr))
10560 *offset = dwarf2_get_attr_constant_value (attr, 0);
10561 else if (attr_form_is_section_offset (attr))
10562 dwarf2_complex_location_expr_complaint ();
10563 else if (attr_form_is_block (attr))
10564 *offset = decode_locdesc (DW_BLOCK (attr), cu);
10566 dwarf2_complex_location_expr_complaint ();
10574 /* Add an aggregate field to the field list. */
10577 dwarf2_add_field (struct field_info *fip, struct die_info *die,
10578 struct dwarf2_cu *cu)
10580 struct objfile *objfile = cu->objfile;
10581 struct gdbarch *gdbarch = get_objfile_arch (objfile);
10582 struct nextfield *new_field;
10583 struct attribute *attr;
10585 const char *fieldname = "";
10587 /* Allocate a new field list entry and link it in. */
10588 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
10589 make_cleanup (xfree, new_field);
10590 memset (new_field, 0, sizeof (struct nextfield));
10592 if (die->tag == DW_TAG_inheritance)
10594 new_field->next = fip->baseclasses;
10595 fip->baseclasses = new_field;
10599 new_field->next = fip->fields;
10600 fip->fields = new_field;
10604 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
10606 new_field->accessibility = DW_UNSND (attr);
10608 new_field->accessibility = dwarf2_default_access_attribute (die, cu);
10609 if (new_field->accessibility != DW_ACCESS_public)
10610 fip->non_public_fields = 1;
10612 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
10614 new_field->virtuality = DW_UNSND (attr);
10616 new_field->virtuality = DW_VIRTUALITY_none;
10618 fp = &new_field->field;
10620 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
10624 /* Data member other than a C++ static data member. */
10626 /* Get type of field. */
10627 fp->type = die_type (die, cu);
10629 SET_FIELD_BITPOS (*fp, 0);
10631 /* Get bit size of field (zero if none). */
10632 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
10635 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
10639 FIELD_BITSIZE (*fp) = 0;
10642 /* Get bit offset of field. */
10643 if (handle_data_member_location (die, cu, &offset))
10644 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
10645 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
10648 if (gdbarch_bits_big_endian (gdbarch))
10650 /* For big endian bits, the DW_AT_bit_offset gives the
10651 additional bit offset from the MSB of the containing
10652 anonymous object to the MSB of the field. We don't
10653 have to do anything special since we don't need to
10654 know the size of the anonymous object. */
10655 SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr));
10659 /* For little endian bits, compute the bit offset to the
10660 MSB of the anonymous object, subtract off the number of
10661 bits from the MSB of the field to the MSB of the
10662 object, and then subtract off the number of bits of
10663 the field itself. The result is the bit offset of
10664 the LSB of the field. */
10665 int anonymous_size;
10666 int bit_offset = DW_UNSND (attr);
10668 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
10671 /* The size of the anonymous object containing
10672 the bit field is explicit, so use the
10673 indicated size (in bytes). */
10674 anonymous_size = DW_UNSND (attr);
10678 /* The size of the anonymous object containing
10679 the bit field must be inferred from the type
10680 attribute of the data member containing the
10682 anonymous_size = TYPE_LENGTH (fp->type);
10684 SET_FIELD_BITPOS (*fp,
10685 (FIELD_BITPOS (*fp)
10686 + anonymous_size * bits_per_byte
10687 - bit_offset - FIELD_BITSIZE (*fp)));
10691 /* Get name of field. */
10692 fieldname = dwarf2_name (die, cu);
10693 if (fieldname == NULL)
10696 /* The name is already allocated along with this objfile, so we don't
10697 need to duplicate it for the type. */
10698 fp->name = fieldname;
10700 /* Change accessibility for artificial fields (e.g. virtual table
10701 pointer or virtual base class pointer) to private. */
10702 if (dwarf2_attr (die, DW_AT_artificial, cu))
10704 FIELD_ARTIFICIAL (*fp) = 1;
10705 new_field->accessibility = DW_ACCESS_private;
10706 fip->non_public_fields = 1;
10709 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
10711 /* C++ static member. */
10713 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10714 is a declaration, but all versions of G++ as of this writing
10715 (so through at least 3.2.1) incorrectly generate
10716 DW_TAG_variable tags. */
10718 const char *physname;
10720 /* Get name of field. */
10721 fieldname = dwarf2_name (die, cu);
10722 if (fieldname == NULL)
10725 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10727 /* Only create a symbol if this is an external value.
10728 new_symbol checks this and puts the value in the global symbol
10729 table, which we want. If it is not external, new_symbol
10730 will try to put the value in cu->list_in_scope which is wrong. */
10731 && dwarf2_flag_true_p (die, DW_AT_external, cu))
10733 /* A static const member, not much different than an enum as far as
10734 we're concerned, except that we can support more types. */
10735 new_symbol (die, NULL, cu);
10738 /* Get physical name. */
10739 physname = dwarf2_physname (fieldname, die, cu);
10741 /* The name is already allocated along with this objfile, so we don't
10742 need to duplicate it for the type. */
10743 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
10744 FIELD_TYPE (*fp) = die_type (die, cu);
10745 FIELD_NAME (*fp) = fieldname;
10747 else if (die->tag == DW_TAG_inheritance)
10751 /* C++ base class field. */
10752 if (handle_data_member_location (die, cu, &offset))
10753 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
10754 FIELD_BITSIZE (*fp) = 0;
10755 FIELD_TYPE (*fp) = die_type (die, cu);
10756 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
10757 fip->nbaseclasses++;
10761 /* Add a typedef defined in the scope of the FIP's class. */
10764 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
10765 struct dwarf2_cu *cu)
10767 struct objfile *objfile = cu->objfile;
10768 struct typedef_field_list *new_field;
10769 struct attribute *attr;
10770 struct typedef_field *fp;
10771 char *fieldname = "";
10773 /* Allocate a new field list entry and link it in. */
10774 new_field = xzalloc (sizeof (*new_field));
10775 make_cleanup (xfree, new_field);
10777 gdb_assert (die->tag == DW_TAG_typedef);
10779 fp = &new_field->field;
10781 /* Get name of field. */
10782 fp->name = dwarf2_name (die, cu);
10783 if (fp->name == NULL)
10786 fp->type = read_type_die (die, cu);
10788 new_field->next = fip->typedef_field_list;
10789 fip->typedef_field_list = new_field;
10790 fip->typedef_field_list_count++;
10793 /* Create the vector of fields, and attach it to the type. */
10796 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
10797 struct dwarf2_cu *cu)
10799 int nfields = fip->nfields;
10801 /* Record the field count, allocate space for the array of fields,
10802 and create blank accessibility bitfields if necessary. */
10803 TYPE_NFIELDS (type) = nfields;
10804 TYPE_FIELDS (type) = (struct field *)
10805 TYPE_ALLOC (type, sizeof (struct field) * nfields);
10806 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
10808 if (fip->non_public_fields && cu->language != language_ada)
10810 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10812 TYPE_FIELD_PRIVATE_BITS (type) =
10813 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
10814 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
10816 TYPE_FIELD_PROTECTED_BITS (type) =
10817 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
10818 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
10820 TYPE_FIELD_IGNORE_BITS (type) =
10821 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
10822 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
10825 /* If the type has baseclasses, allocate and clear a bit vector for
10826 TYPE_FIELD_VIRTUAL_BITS. */
10827 if (fip->nbaseclasses && cu->language != language_ada)
10829 int num_bytes = B_BYTES (fip->nbaseclasses);
10830 unsigned char *pointer;
10832 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10833 pointer = TYPE_ALLOC (type, num_bytes);
10834 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
10835 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
10836 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
10839 /* Copy the saved-up fields into the field vector. Start from the head of
10840 the list, adding to the tail of the field array, so that they end up in
10841 the same order in the array in which they were added to the list. */
10842 while (nfields-- > 0)
10844 struct nextfield *fieldp;
10848 fieldp = fip->fields;
10849 fip->fields = fieldp->next;
10853 fieldp = fip->baseclasses;
10854 fip->baseclasses = fieldp->next;
10857 TYPE_FIELD (type, nfields) = fieldp->field;
10858 switch (fieldp->accessibility)
10860 case DW_ACCESS_private:
10861 if (cu->language != language_ada)
10862 SET_TYPE_FIELD_PRIVATE (type, nfields);
10865 case DW_ACCESS_protected:
10866 if (cu->language != language_ada)
10867 SET_TYPE_FIELD_PROTECTED (type, nfields);
10870 case DW_ACCESS_public:
10874 /* Unknown accessibility. Complain and treat it as public. */
10876 complaint (&symfile_complaints, _("unsupported accessibility %d"),
10877 fieldp->accessibility);
10881 if (nfields < fip->nbaseclasses)
10883 switch (fieldp->virtuality)
10885 case DW_VIRTUALITY_virtual:
10886 case DW_VIRTUALITY_pure_virtual:
10887 if (cu->language == language_ada)
10888 error (_("unexpected virtuality in component of Ada type"));
10889 SET_TYPE_FIELD_VIRTUAL (type, nfields);
10896 /* Return true if this member function is a constructor, false
10900 dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu)
10902 const char *fieldname;
10903 const char *typename;
10906 if (die->parent == NULL)
10909 if (die->parent->tag != DW_TAG_structure_type
10910 && die->parent->tag != DW_TAG_union_type
10911 && die->parent->tag != DW_TAG_class_type)
10914 fieldname = dwarf2_name (die, cu);
10915 typename = dwarf2_name (die->parent, cu);
10916 if (fieldname == NULL || typename == NULL)
10919 len = strlen (fieldname);
10920 return (strncmp (fieldname, typename, len) == 0
10921 && (typename[len] == '\0' || typename[len] == '<'));
10924 /* Add a member function to the proper fieldlist. */
10927 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
10928 struct type *type, struct dwarf2_cu *cu)
10930 struct objfile *objfile = cu->objfile;
10931 struct attribute *attr;
10932 struct fnfieldlist *flp;
10934 struct fn_field *fnp;
10935 const char *fieldname;
10936 struct nextfnfield *new_fnfield;
10937 struct type *this_type;
10938 enum dwarf_access_attribute accessibility;
10940 if (cu->language == language_ada)
10941 error (_("unexpected member function in Ada type"));
10943 /* Get name of member function. */
10944 fieldname = dwarf2_name (die, cu);
10945 if (fieldname == NULL)
10948 /* Look up member function name in fieldlist. */
10949 for (i = 0; i < fip->nfnfields; i++)
10951 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
10955 /* Create new list element if necessary. */
10956 if (i < fip->nfnfields)
10957 flp = &fip->fnfieldlists[i];
10960 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
10962 fip->fnfieldlists = (struct fnfieldlist *)
10963 xrealloc (fip->fnfieldlists,
10964 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
10965 * sizeof (struct fnfieldlist));
10966 if (fip->nfnfields == 0)
10967 make_cleanup (free_current_contents, &fip->fnfieldlists);
10969 flp = &fip->fnfieldlists[fip->nfnfields];
10970 flp->name = fieldname;
10973 i = fip->nfnfields++;
10976 /* Create a new member function field and chain it to the field list
10978 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
10979 make_cleanup (xfree, new_fnfield);
10980 memset (new_fnfield, 0, sizeof (struct nextfnfield));
10981 new_fnfield->next = flp->head;
10982 flp->head = new_fnfield;
10985 /* Fill in the member function field info. */
10986 fnp = &new_fnfield->fnfield;
10988 /* Delay processing of the physname until later. */
10989 if (cu->language == language_cplus || cu->language == language_java)
10991 add_to_method_list (type, i, flp->length - 1, fieldname,
10996 const char *physname = dwarf2_physname (fieldname, die, cu);
10997 fnp->physname = physname ? physname : "";
11000 fnp->type = alloc_type (objfile);
11001 this_type = read_type_die (die, cu);
11002 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
11004 int nparams = TYPE_NFIELDS (this_type);
11006 /* TYPE is the domain of this method, and THIS_TYPE is the type
11007 of the method itself (TYPE_CODE_METHOD). */
11008 smash_to_method_type (fnp->type, type,
11009 TYPE_TARGET_TYPE (this_type),
11010 TYPE_FIELDS (this_type),
11011 TYPE_NFIELDS (this_type),
11012 TYPE_VARARGS (this_type));
11014 /* Handle static member functions.
11015 Dwarf2 has no clean way to discern C++ static and non-static
11016 member functions. G++ helps GDB by marking the first
11017 parameter for non-static member functions (which is the this
11018 pointer) as artificial. We obtain this information from
11019 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
11020 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
11021 fnp->voffset = VOFFSET_STATIC;
11024 complaint (&symfile_complaints, _("member function type missing for '%s'"),
11025 dwarf2_full_name (fieldname, die, cu));
11027 /* Get fcontext from DW_AT_containing_type if present. */
11028 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
11029 fnp->fcontext = die_containing_type (die, cu);
11031 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
11032 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
11034 /* Get accessibility. */
11035 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
11037 accessibility = DW_UNSND (attr);
11039 accessibility = dwarf2_default_access_attribute (die, cu);
11040 switch (accessibility)
11042 case DW_ACCESS_private:
11043 fnp->is_private = 1;
11045 case DW_ACCESS_protected:
11046 fnp->is_protected = 1;
11050 /* Check for artificial methods. */
11051 attr = dwarf2_attr (die, DW_AT_artificial, cu);
11052 if (attr && DW_UNSND (attr) != 0)
11053 fnp->is_artificial = 1;
11055 fnp->is_constructor = dwarf2_is_constructor (die, cu);
11057 /* Get index in virtual function table if it is a virtual member
11058 function. For older versions of GCC, this is an offset in the
11059 appropriate virtual table, as specified by DW_AT_containing_type.
11060 For everyone else, it is an expression to be evaluated relative
11061 to the object address. */
11063 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
11066 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
11068 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
11070 /* Old-style GCC. */
11071 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
11073 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
11074 || (DW_BLOCK (attr)->size > 1
11075 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
11076 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
11078 struct dwarf_block blk;
11081 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
11083 blk.size = DW_BLOCK (attr)->size - offset;
11084 blk.data = DW_BLOCK (attr)->data + offset;
11085 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
11086 if ((fnp->voffset % cu->header.addr_size) != 0)
11087 dwarf2_complex_location_expr_complaint ();
11089 fnp->voffset /= cu->header.addr_size;
11093 dwarf2_complex_location_expr_complaint ();
11095 if (!fnp->fcontext)
11096 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
11098 else if (attr_form_is_section_offset (attr))
11100 dwarf2_complex_location_expr_complaint ();
11104 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
11110 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
11111 if (attr && DW_UNSND (attr))
11113 /* GCC does this, as of 2008-08-25; PR debug/37237. */
11114 complaint (&symfile_complaints,
11115 _("Member function \"%s\" (offset %d) is virtual "
11116 "but the vtable offset is not specified"),
11117 fieldname, die->offset.sect_off);
11118 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11119 TYPE_CPLUS_DYNAMIC (type) = 1;
11124 /* Create the vector of member function fields, and attach it to the type. */
11127 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
11128 struct dwarf2_cu *cu)
11130 struct fnfieldlist *flp;
11133 if (cu->language == language_ada)
11134 error (_("unexpected member functions in Ada type"));
11136 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11137 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
11138 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
11140 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
11142 struct nextfnfield *nfp = flp->head;
11143 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
11146 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
11147 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
11148 fn_flp->fn_fields = (struct fn_field *)
11149 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
11150 for (k = flp->length; (k--, nfp); nfp = nfp->next)
11151 fn_flp->fn_fields[k] = nfp->fnfield;
11154 TYPE_NFN_FIELDS (type) = fip->nfnfields;
11157 /* Returns non-zero if NAME is the name of a vtable member in CU's
11158 language, zero otherwise. */
11160 is_vtable_name (const char *name, struct dwarf2_cu *cu)
11162 static const char vptr[] = "_vptr";
11163 static const char vtable[] = "vtable";
11165 /* Look for the C++ and Java forms of the vtable. */
11166 if ((cu->language == language_java
11167 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
11168 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
11169 && is_cplus_marker (name[sizeof (vptr) - 1])))
11175 /* GCC outputs unnamed structures that are really pointers to member
11176 functions, with the ABI-specified layout. If TYPE describes
11177 such a structure, smash it into a member function type.
11179 GCC shouldn't do this; it should just output pointer to member DIEs.
11180 This is GCC PR debug/28767. */
11183 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
11185 struct type *pfn_type, *domain_type, *new_type;
11187 /* Check for a structure with no name and two children. */
11188 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
11191 /* Check for __pfn and __delta members. */
11192 if (TYPE_FIELD_NAME (type, 0) == NULL
11193 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
11194 || TYPE_FIELD_NAME (type, 1) == NULL
11195 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
11198 /* Find the type of the method. */
11199 pfn_type = TYPE_FIELD_TYPE (type, 0);
11200 if (pfn_type == NULL
11201 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
11202 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
11205 /* Look for the "this" argument. */
11206 pfn_type = TYPE_TARGET_TYPE (pfn_type);
11207 if (TYPE_NFIELDS (pfn_type) == 0
11208 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11209 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
11212 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
11213 new_type = alloc_type (objfile);
11214 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
11215 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
11216 TYPE_VARARGS (pfn_type));
11217 smash_to_methodptr_type (type, new_type);
11220 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11224 producer_is_icc (struct dwarf2_cu *cu)
11226 if (!cu->checked_producer)
11227 check_producer (cu);
11229 return cu->producer_is_icc;
11232 /* Called when we find the DIE that starts a structure or union scope
11233 (definition) to create a type for the structure or union. Fill in
11234 the type's name and general properties; the members will not be
11235 processed until process_structure_type.
11237 NOTE: we need to call these functions regardless of whether or not the
11238 DIE has a DW_AT_name attribute, since it might be an anonymous
11239 structure or union. This gets the type entered into our set of
11240 user defined types.
11242 However, if the structure is incomplete (an opaque struct/union)
11243 then suppress creating a symbol table entry for it since gdb only
11244 wants to find the one with the complete definition. Note that if
11245 it is complete, we just call new_symbol, which does it's own
11246 checking about whether the struct/union is anonymous or not (and
11247 suppresses creating a symbol table entry itself). */
11249 static struct type *
11250 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
11252 struct objfile *objfile = cu->objfile;
11254 struct attribute *attr;
11257 /* If the definition of this type lives in .debug_types, read that type.
11258 Don't follow DW_AT_specification though, that will take us back up
11259 the chain and we want to go down. */
11260 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
11263 struct dwarf2_cu *type_cu = cu;
11264 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11266 /* We could just recurse on read_structure_type, but we need to call
11267 get_die_type to ensure only one type for this DIE is created.
11268 This is important, for example, because for c++ classes we need
11269 TYPE_NAME set which is only done by new_symbol. Blech. */
11270 type = read_type_die (type_die, type_cu);
11272 /* TYPE_CU may not be the same as CU.
11273 Ensure TYPE is recorded in CU's type_hash table. */
11274 return set_die_type (die, type, cu);
11277 type = alloc_type (objfile);
11278 INIT_CPLUS_SPECIFIC (type);
11280 name = dwarf2_name (die, cu);
11283 if (cu->language == language_cplus
11284 || cu->language == language_java)
11286 const char *full_name = dwarf2_full_name (name, die, cu);
11288 /* dwarf2_full_name might have already finished building the DIE's
11289 type. If so, there is no need to continue. */
11290 if (get_die_type (die, cu) != NULL)
11291 return get_die_type (die, cu);
11293 TYPE_TAG_NAME (type) = full_name;
11294 if (die->tag == DW_TAG_structure_type
11295 || die->tag == DW_TAG_class_type)
11296 TYPE_NAME (type) = TYPE_TAG_NAME (type);
11300 /* The name is already allocated along with this objfile, so
11301 we don't need to duplicate it for the type. */
11302 TYPE_TAG_NAME (type) = name;
11303 if (die->tag == DW_TAG_class_type)
11304 TYPE_NAME (type) = TYPE_TAG_NAME (type);
11308 if (die->tag == DW_TAG_structure_type)
11310 TYPE_CODE (type) = TYPE_CODE_STRUCT;
11312 else if (die->tag == DW_TAG_union_type)
11314 TYPE_CODE (type) = TYPE_CODE_UNION;
11318 TYPE_CODE (type) = TYPE_CODE_CLASS;
11321 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
11322 TYPE_DECLARED_CLASS (type) = 1;
11324 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11327 TYPE_LENGTH (type) = DW_UNSND (attr);
11331 TYPE_LENGTH (type) = 0;
11334 if (producer_is_icc (cu))
11336 /* ICC does not output the required DW_AT_declaration
11337 on incomplete types, but gives them a size of zero. */
11340 TYPE_STUB_SUPPORTED (type) = 1;
11342 if (die_is_declaration (die, cu))
11343 TYPE_STUB (type) = 1;
11344 else if (attr == NULL && die->child == NULL
11345 && producer_is_realview (cu->producer))
11346 /* RealView does not output the required DW_AT_declaration
11347 on incomplete types. */
11348 TYPE_STUB (type) = 1;
11350 /* We need to add the type field to the die immediately so we don't
11351 infinitely recurse when dealing with pointers to the structure
11352 type within the structure itself. */
11353 set_die_type (die, type, cu);
11355 /* set_die_type should be already done. */
11356 set_descriptive_type (type, die, cu);
11361 /* Finish creating a structure or union type, including filling in
11362 its members and creating a symbol for it. */
11365 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
11367 struct objfile *objfile = cu->objfile;
11368 struct die_info *child_die = die->child;
11371 type = get_die_type (die, cu);
11373 type = read_structure_type (die, cu);
11375 if (die->child != NULL && ! die_is_declaration (die, cu))
11377 struct field_info fi;
11378 struct die_info *child_die;
11379 VEC (symbolp) *template_args = NULL;
11380 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
11382 memset (&fi, 0, sizeof (struct field_info));
11384 child_die = die->child;
11386 while (child_die && child_die->tag)
11388 if (child_die->tag == DW_TAG_member
11389 || child_die->tag == DW_TAG_variable)
11391 /* NOTE: carlton/2002-11-05: A C++ static data member
11392 should be a DW_TAG_member that is a declaration, but
11393 all versions of G++ as of this writing (so through at
11394 least 3.2.1) incorrectly generate DW_TAG_variable
11395 tags for them instead. */
11396 dwarf2_add_field (&fi, child_die, cu);
11398 else if (child_die->tag == DW_TAG_subprogram)
11400 /* C++ member function. */
11401 dwarf2_add_member_fn (&fi, child_die, type, cu);
11403 else if (child_die->tag == DW_TAG_inheritance)
11405 /* C++ base class field. */
11406 dwarf2_add_field (&fi, child_die, cu);
11408 else if (child_die->tag == DW_TAG_typedef)
11409 dwarf2_add_typedef (&fi, child_die, cu);
11410 else if (child_die->tag == DW_TAG_template_type_param
11411 || child_die->tag == DW_TAG_template_value_param)
11413 struct symbol *arg = new_symbol (child_die, NULL, cu);
11416 VEC_safe_push (symbolp, template_args, arg);
11419 child_die = sibling_die (child_die);
11422 /* Attach template arguments to type. */
11423 if (! VEC_empty (symbolp, template_args))
11425 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11426 TYPE_N_TEMPLATE_ARGUMENTS (type)
11427 = VEC_length (symbolp, template_args);
11428 TYPE_TEMPLATE_ARGUMENTS (type)
11429 = obstack_alloc (&objfile->objfile_obstack,
11430 (TYPE_N_TEMPLATE_ARGUMENTS (type)
11431 * sizeof (struct symbol *)));
11432 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
11433 VEC_address (symbolp, template_args),
11434 (TYPE_N_TEMPLATE_ARGUMENTS (type)
11435 * sizeof (struct symbol *)));
11436 VEC_free (symbolp, template_args);
11439 /* Attach fields and member functions to the type. */
11441 dwarf2_attach_fields_to_type (&fi, type, cu);
11444 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
11446 /* Get the type which refers to the base class (possibly this
11447 class itself) which contains the vtable pointer for the current
11448 class from the DW_AT_containing_type attribute. This use of
11449 DW_AT_containing_type is a GNU extension. */
11451 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
11453 struct type *t = die_containing_type (die, cu);
11455 TYPE_VPTR_BASETYPE (type) = t;
11460 /* Our own class provides vtbl ptr. */
11461 for (i = TYPE_NFIELDS (t) - 1;
11462 i >= TYPE_N_BASECLASSES (t);
11465 const char *fieldname = TYPE_FIELD_NAME (t, i);
11467 if (is_vtable_name (fieldname, cu))
11469 TYPE_VPTR_FIELDNO (type) = i;
11474 /* Complain if virtual function table field not found. */
11475 if (i < TYPE_N_BASECLASSES (t))
11476 complaint (&symfile_complaints,
11477 _("virtual function table pointer "
11478 "not found when defining class '%s'"),
11479 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
11484 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
11487 else if (cu->producer
11488 && strncmp (cu->producer,
11489 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11491 /* The IBM XLC compiler does not provide direct indication
11492 of the containing type, but the vtable pointer is
11493 always named __vfp. */
11497 for (i = TYPE_NFIELDS (type) - 1;
11498 i >= TYPE_N_BASECLASSES (type);
11501 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
11503 TYPE_VPTR_FIELDNO (type) = i;
11504 TYPE_VPTR_BASETYPE (type) = type;
11511 /* Copy fi.typedef_field_list linked list elements content into the
11512 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11513 if (fi.typedef_field_list)
11515 int i = fi.typedef_field_list_count;
11517 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11518 TYPE_TYPEDEF_FIELD_ARRAY (type)
11519 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
11520 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
11522 /* Reverse the list order to keep the debug info elements order. */
11525 struct typedef_field *dest, *src;
11527 dest = &TYPE_TYPEDEF_FIELD (type, i);
11528 src = &fi.typedef_field_list->field;
11529 fi.typedef_field_list = fi.typedef_field_list->next;
11534 do_cleanups (back_to);
11536 if (HAVE_CPLUS_STRUCT (type))
11537 TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java;
11540 quirk_gcc_member_function_pointer (type, objfile);
11542 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11543 snapshots) has been known to create a die giving a declaration
11544 for a class that has, as a child, a die giving a definition for a
11545 nested class. So we have to process our children even if the
11546 current die is a declaration. Normally, of course, a declaration
11547 won't have any children at all. */
11549 while (child_die != NULL && child_die->tag)
11551 if (child_die->tag == DW_TAG_member
11552 || child_die->tag == DW_TAG_variable
11553 || child_die->tag == DW_TAG_inheritance
11554 || child_die->tag == DW_TAG_template_value_param
11555 || child_die->tag == DW_TAG_template_type_param)
11560 process_die (child_die, cu);
11562 child_die = sibling_die (child_die);
11565 /* Do not consider external references. According to the DWARF standard,
11566 these DIEs are identified by the fact that they have no byte_size
11567 attribute, and a declaration attribute. */
11568 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
11569 || !die_is_declaration (die, cu))
11570 new_symbol (die, type, cu);
11573 /* Given a DW_AT_enumeration_type die, set its type. We do not
11574 complete the type's fields yet, or create any symbols. */
11576 static struct type *
11577 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
11579 struct objfile *objfile = cu->objfile;
11581 struct attribute *attr;
11584 /* If the definition of this type lives in .debug_types, read that type.
11585 Don't follow DW_AT_specification though, that will take us back up
11586 the chain and we want to go down. */
11587 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
11590 struct dwarf2_cu *type_cu = cu;
11591 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11593 type = read_type_die (type_die, type_cu);
11595 /* TYPE_CU may not be the same as CU.
11596 Ensure TYPE is recorded in CU's type_hash table. */
11597 return set_die_type (die, type, cu);
11600 type = alloc_type (objfile);
11602 TYPE_CODE (type) = TYPE_CODE_ENUM;
11603 name = dwarf2_full_name (NULL, die, cu);
11605 TYPE_TAG_NAME (type) = name;
11607 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11610 TYPE_LENGTH (type) = DW_UNSND (attr);
11614 TYPE_LENGTH (type) = 0;
11617 /* The enumeration DIE can be incomplete. In Ada, any type can be
11618 declared as private in the package spec, and then defined only
11619 inside the package body. Such types are known as Taft Amendment
11620 Types. When another package uses such a type, an incomplete DIE
11621 may be generated by the compiler. */
11622 if (die_is_declaration (die, cu))
11623 TYPE_STUB (type) = 1;
11625 return set_die_type (die, type, cu);
11628 /* Given a pointer to a die which begins an enumeration, process all
11629 the dies that define the members of the enumeration, and create the
11630 symbol for the enumeration type.
11632 NOTE: We reverse the order of the element list. */
11635 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
11637 struct type *this_type;
11639 this_type = get_die_type (die, cu);
11640 if (this_type == NULL)
11641 this_type = read_enumeration_type (die, cu);
11643 if (die->child != NULL)
11645 struct die_info *child_die;
11646 struct symbol *sym;
11647 struct field *fields = NULL;
11648 int num_fields = 0;
11649 int unsigned_enum = 1;
11654 child_die = die->child;
11655 while (child_die && child_die->tag)
11657 if (child_die->tag != DW_TAG_enumerator)
11659 process_die (child_die, cu);
11663 name = dwarf2_name (child_die, cu);
11666 sym = new_symbol (child_die, this_type, cu);
11667 if (SYMBOL_VALUE (sym) < 0)
11672 else if ((mask & SYMBOL_VALUE (sym)) != 0)
11675 mask |= SYMBOL_VALUE (sym);
11677 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
11679 fields = (struct field *)
11681 (num_fields + DW_FIELD_ALLOC_CHUNK)
11682 * sizeof (struct field));
11685 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
11686 FIELD_TYPE (fields[num_fields]) = NULL;
11687 SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym));
11688 FIELD_BITSIZE (fields[num_fields]) = 0;
11694 child_die = sibling_die (child_die);
11699 TYPE_NFIELDS (this_type) = num_fields;
11700 TYPE_FIELDS (this_type) = (struct field *)
11701 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
11702 memcpy (TYPE_FIELDS (this_type), fields,
11703 sizeof (struct field) * num_fields);
11707 TYPE_UNSIGNED (this_type) = 1;
11709 TYPE_FLAG_ENUM (this_type) = 1;
11712 /* If we are reading an enum from a .debug_types unit, and the enum
11713 is a declaration, and the enum is not the signatured type in the
11714 unit, then we do not want to add a symbol for it. Adding a
11715 symbol would in some cases obscure the true definition of the
11716 enum, giving users an incomplete type when the definition is
11717 actually available. Note that we do not want to do this for all
11718 enums which are just declarations, because C++0x allows forward
11719 enum declarations. */
11720 if (cu->per_cu->is_debug_types
11721 && die_is_declaration (die, cu))
11723 struct signatured_type *sig_type;
11726 = lookup_signatured_type_at_offset (dwarf2_per_objfile->objfile,
11727 cu->per_cu->section,
11728 cu->per_cu->offset);
11729 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
11730 if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off)
11734 new_symbol (die, this_type, cu);
11737 /* Extract all information from a DW_TAG_array_type DIE and put it in
11738 the DIE's type field. For now, this only handles one dimensional
11741 static struct type *
11742 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
11744 struct objfile *objfile = cu->objfile;
11745 struct die_info *child_die;
11747 struct type *element_type, *range_type, *index_type;
11748 struct type **range_types = NULL;
11749 struct attribute *attr;
11751 struct cleanup *back_to;
11754 element_type = die_type (die, cu);
11756 /* The die_type call above may have already set the type for this DIE. */
11757 type = get_die_type (die, cu);
11761 /* Irix 6.2 native cc creates array types without children for
11762 arrays with unspecified length. */
11763 if (die->child == NULL)
11765 index_type = objfile_type (objfile)->builtin_int;
11766 range_type = create_range_type (NULL, index_type, 0, -1);
11767 type = create_array_type (NULL, element_type, range_type);
11768 return set_die_type (die, type, cu);
11771 back_to = make_cleanup (null_cleanup, NULL);
11772 child_die = die->child;
11773 while (child_die && child_die->tag)
11775 if (child_die->tag == DW_TAG_subrange_type)
11777 struct type *child_type = read_type_die (child_die, cu);
11779 if (child_type != NULL)
11781 /* The range type was succesfully read. Save it for the
11782 array type creation. */
11783 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
11785 range_types = (struct type **)
11786 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
11787 * sizeof (struct type *));
11789 make_cleanup (free_current_contents, &range_types);
11791 range_types[ndim++] = child_type;
11794 child_die = sibling_die (child_die);
11797 /* Dwarf2 dimensions are output from left to right, create the
11798 necessary array types in backwards order. */
11800 type = element_type;
11802 if (read_array_order (die, cu) == DW_ORD_col_major)
11807 type = create_array_type (NULL, type, range_types[i++]);
11812 type = create_array_type (NULL, type, range_types[ndim]);
11815 /* Understand Dwarf2 support for vector types (like they occur on
11816 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11817 array type. This is not part of the Dwarf2/3 standard yet, but a
11818 custom vendor extension. The main difference between a regular
11819 array and the vector variant is that vectors are passed by value
11821 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
11823 make_vector_type (type);
11825 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11826 implementation may choose to implement triple vectors using this
11828 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11831 if (DW_UNSND (attr) >= TYPE_LENGTH (type))
11832 TYPE_LENGTH (type) = DW_UNSND (attr);
11834 complaint (&symfile_complaints,
11835 _("DW_AT_byte_size for array type smaller "
11836 "than the total size of elements"));
11839 name = dwarf2_name (die, cu);
11841 TYPE_NAME (type) = name;
11843 /* Install the type in the die. */
11844 set_die_type (die, type, cu);
11846 /* set_die_type should be already done. */
11847 set_descriptive_type (type, die, cu);
11849 do_cleanups (back_to);
11854 static enum dwarf_array_dim_ordering
11855 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
11857 struct attribute *attr;
11859 attr = dwarf2_attr (die, DW_AT_ordering, cu);
11861 if (attr) return DW_SND (attr);
11863 /* GNU F77 is a special case, as at 08/2004 array type info is the
11864 opposite order to the dwarf2 specification, but data is still
11865 laid out as per normal fortran.
11867 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11868 version checking. */
11870 if (cu->language == language_fortran
11871 && cu->producer && strstr (cu->producer, "GNU F77"))
11873 return DW_ORD_row_major;
11876 switch (cu->language_defn->la_array_ordering)
11878 case array_column_major:
11879 return DW_ORD_col_major;
11880 case array_row_major:
11882 return DW_ORD_row_major;
11886 /* Extract all information from a DW_TAG_set_type DIE and put it in
11887 the DIE's type field. */
11889 static struct type *
11890 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
11892 struct type *domain_type, *set_type;
11893 struct attribute *attr;
11895 domain_type = die_type (die, cu);
11897 /* The die_type call above may have already set the type for this DIE. */
11898 set_type = get_die_type (die, cu);
11902 set_type = create_set_type (NULL, domain_type);
11904 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11906 TYPE_LENGTH (set_type) = DW_UNSND (attr);
11908 return set_die_type (die, set_type, cu);
11911 /* A helper for read_common_block that creates a locexpr baton.
11912 SYM is the symbol which we are marking as computed.
11913 COMMON_DIE is the DIE for the common block.
11914 COMMON_LOC is the location expression attribute for the common
11916 MEMBER_LOC is the location expression attribute for the particular
11917 member of the common block that we are processing.
11918 CU is the CU from which the above come. */
11921 mark_common_block_symbol_computed (struct symbol *sym,
11922 struct die_info *common_die,
11923 struct attribute *common_loc,
11924 struct attribute *member_loc,
11925 struct dwarf2_cu *cu)
11927 struct objfile *objfile = dwarf2_per_objfile->objfile;
11928 struct dwarf2_locexpr_baton *baton;
11930 unsigned int cu_off;
11931 enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile));
11932 LONGEST offset = 0;
11934 gdb_assert (common_loc && member_loc);
11935 gdb_assert (attr_form_is_block (common_loc));
11936 gdb_assert (attr_form_is_block (member_loc)
11937 || attr_form_is_constant (member_loc));
11939 baton = obstack_alloc (&objfile->objfile_obstack,
11940 sizeof (struct dwarf2_locexpr_baton));
11941 baton->per_cu = cu->per_cu;
11942 gdb_assert (baton->per_cu);
11944 baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11946 if (attr_form_is_constant (member_loc))
11948 offset = dwarf2_get_attr_constant_value (member_loc, 0);
11949 baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size;
11952 baton->size += DW_BLOCK (member_loc)->size;
11954 ptr = obstack_alloc (&objfile->objfile_obstack, baton->size);
11957 *ptr++ = DW_OP_call4;
11958 cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off;
11959 store_unsigned_integer (ptr, 4, byte_order, cu_off);
11962 if (attr_form_is_constant (member_loc))
11964 *ptr++ = DW_OP_addr;
11965 store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset);
11966 ptr += cu->header.addr_size;
11970 /* We have to copy the data here, because DW_OP_call4 will only
11971 use a DW_AT_location attribute. */
11972 memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size);
11973 ptr += DW_BLOCK (member_loc)->size;
11976 *ptr++ = DW_OP_plus;
11977 gdb_assert (ptr - baton->data == baton->size);
11979 SYMBOL_LOCATION_BATON (sym) = baton;
11980 SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index;
11983 /* Create appropriate locally-scoped variables for all the
11984 DW_TAG_common_block entries. Also create a struct common_block
11985 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11986 is used to sepate the common blocks name namespace from regular
11990 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
11992 struct attribute *attr;
11994 attr = dwarf2_attr (die, DW_AT_location, cu);
11997 /* Support the .debug_loc offsets. */
11998 if (attr_form_is_block (attr))
12002 else if (attr_form_is_section_offset (attr))
12004 dwarf2_complex_location_expr_complaint ();
12009 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
12010 "common block member");
12015 if (die->child != NULL)
12017 struct objfile *objfile = cu->objfile;
12018 struct die_info *child_die;
12019 size_t n_entries = 0, size;
12020 struct common_block *common_block;
12021 struct symbol *sym;
12023 for (child_die = die->child;
12024 child_die && child_die->tag;
12025 child_die = sibling_die (child_die))
12028 size = (sizeof (struct common_block)
12029 + (n_entries - 1) * sizeof (struct symbol *));
12030 common_block = obstack_alloc (&objfile->objfile_obstack, size);
12031 memset (common_block->contents, 0, n_entries * sizeof (struct symbol *));
12032 common_block->n_entries = 0;
12034 for (child_die = die->child;
12035 child_die && child_die->tag;
12036 child_die = sibling_die (child_die))
12038 /* Create the symbol in the DW_TAG_common_block block in the current
12040 sym = new_symbol (child_die, NULL, cu);
12043 struct attribute *member_loc;
12045 common_block->contents[common_block->n_entries++] = sym;
12047 member_loc = dwarf2_attr (child_die, DW_AT_data_member_location,
12051 /* GDB has handled this for a long time, but it is
12052 not specified by DWARF. It seems to have been
12053 emitted by gfortran at least as recently as:
12054 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
12055 complaint (&symfile_complaints,
12056 _("Variable in common block has "
12057 "DW_AT_data_member_location "
12058 "- DIE at 0x%x [in module %s]"),
12059 child_die->offset.sect_off, cu->objfile->name);
12061 if (attr_form_is_section_offset (member_loc))
12062 dwarf2_complex_location_expr_complaint ();
12063 else if (attr_form_is_constant (member_loc)
12064 || attr_form_is_block (member_loc))
12067 mark_common_block_symbol_computed (sym, die, attr,
12071 dwarf2_complex_location_expr_complaint ();
12076 sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu);
12077 SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block;
12081 /* Create a type for a C++ namespace. */
12083 static struct type *
12084 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
12086 struct objfile *objfile = cu->objfile;
12087 const char *previous_prefix, *name;
12091 /* For extensions, reuse the type of the original namespace. */
12092 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
12094 struct die_info *ext_die;
12095 struct dwarf2_cu *ext_cu = cu;
12097 ext_die = dwarf2_extension (die, &ext_cu);
12098 type = read_type_die (ext_die, ext_cu);
12100 /* EXT_CU may not be the same as CU.
12101 Ensure TYPE is recorded in CU's type_hash table. */
12102 return set_die_type (die, type, cu);
12105 name = namespace_name (die, &is_anonymous, cu);
12107 /* Now build the name of the current namespace. */
12109 previous_prefix = determine_prefix (die, cu);
12110 if (previous_prefix[0] != '\0')
12111 name = typename_concat (&objfile->objfile_obstack,
12112 previous_prefix, name, 0, cu);
12114 /* Create the type. */
12115 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
12117 TYPE_NAME (type) = name;
12118 TYPE_TAG_NAME (type) = TYPE_NAME (type);
12120 return set_die_type (die, type, cu);
12123 /* Read a C++ namespace. */
12126 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
12128 struct objfile *objfile = cu->objfile;
12131 /* Add a symbol associated to this if we haven't seen the namespace
12132 before. Also, add a using directive if it's an anonymous
12135 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
12139 type = read_type_die (die, cu);
12140 new_symbol (die, type, cu);
12142 namespace_name (die, &is_anonymous, cu);
12145 const char *previous_prefix = determine_prefix (die, cu);
12147 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
12148 NULL, NULL, 0, &objfile->objfile_obstack);
12152 if (die->child != NULL)
12154 struct die_info *child_die = die->child;
12156 while (child_die && child_die->tag)
12158 process_die (child_die, cu);
12159 child_die = sibling_die (child_die);
12164 /* Read a Fortran module as type. This DIE can be only a declaration used for
12165 imported module. Still we need that type as local Fortran "use ... only"
12166 declaration imports depend on the created type in determine_prefix. */
12168 static struct type *
12169 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
12171 struct objfile *objfile = cu->objfile;
12172 const char *module_name;
12175 module_name = dwarf2_name (die, cu);
12177 complaint (&symfile_complaints,
12178 _("DW_TAG_module has no name, offset 0x%x"),
12179 die->offset.sect_off);
12180 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
12182 /* determine_prefix uses TYPE_TAG_NAME. */
12183 TYPE_TAG_NAME (type) = TYPE_NAME (type);
12185 return set_die_type (die, type, cu);
12188 /* Read a Fortran module. */
12191 read_module (struct die_info *die, struct dwarf2_cu *cu)
12193 struct die_info *child_die = die->child;
12195 while (child_die && child_die->tag)
12197 process_die (child_die, cu);
12198 child_die = sibling_die (child_die);
12202 /* Return the name of the namespace represented by DIE. Set
12203 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12206 static const char *
12207 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
12209 struct die_info *current_die;
12210 const char *name = NULL;
12212 /* Loop through the extensions until we find a name. */
12214 for (current_die = die;
12215 current_die != NULL;
12216 current_die = dwarf2_extension (die, &cu))
12218 name = dwarf2_name (current_die, cu);
12223 /* Is it an anonymous namespace? */
12225 *is_anonymous = (name == NULL);
12227 name = CP_ANONYMOUS_NAMESPACE_STR;
12232 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12233 the user defined type vector. */
12235 static struct type *
12236 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
12238 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
12239 struct comp_unit_head *cu_header = &cu->header;
12241 struct attribute *attr_byte_size;
12242 struct attribute *attr_address_class;
12243 int byte_size, addr_class;
12244 struct type *target_type;
12246 target_type = die_type (die, cu);
12248 /* The die_type call above may have already set the type for this DIE. */
12249 type = get_die_type (die, cu);
12253 type = lookup_pointer_type (target_type);
12255 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
12256 if (attr_byte_size)
12257 byte_size = DW_UNSND (attr_byte_size);
12259 byte_size = cu_header->addr_size;
12261 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
12262 if (attr_address_class)
12263 addr_class = DW_UNSND (attr_address_class);
12265 addr_class = DW_ADDR_none;
12267 /* If the pointer size or address class is different than the
12268 default, create a type variant marked as such and set the
12269 length accordingly. */
12270 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
12272 if (gdbarch_address_class_type_flags_p (gdbarch))
12276 type_flags = gdbarch_address_class_type_flags
12277 (gdbarch, byte_size, addr_class);
12278 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
12280 type = make_type_with_address_space (type, type_flags);
12282 else if (TYPE_LENGTH (type) != byte_size)
12284 complaint (&symfile_complaints,
12285 _("invalid pointer size %d"), byte_size);
12289 /* Should we also complain about unhandled address classes? */
12293 TYPE_LENGTH (type) = byte_size;
12294 return set_die_type (die, type, cu);
12297 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12298 the user defined type vector. */
12300 static struct type *
12301 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
12304 struct type *to_type;
12305 struct type *domain;
12307 to_type = die_type (die, cu);
12308 domain = die_containing_type (die, cu);
12310 /* The calls above may have already set the type for this DIE. */
12311 type = get_die_type (die, cu);
12315 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
12316 type = lookup_methodptr_type (to_type);
12317 else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC)
12319 struct type *new_type = alloc_type (cu->objfile);
12321 smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type),
12322 TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type),
12323 TYPE_VARARGS (to_type));
12324 type = lookup_methodptr_type (new_type);
12327 type = lookup_memberptr_type (to_type, domain);
12329 return set_die_type (die, type, cu);
12332 /* Extract all information from a DW_TAG_reference_type DIE and add to
12333 the user defined type vector. */
12335 static struct type *
12336 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
12338 struct comp_unit_head *cu_header = &cu->header;
12339 struct type *type, *target_type;
12340 struct attribute *attr;
12342 target_type = die_type (die, cu);
12344 /* The die_type call above may have already set the type for this DIE. */
12345 type = get_die_type (die, cu);
12349 type = lookup_reference_type (target_type);
12350 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12353 TYPE_LENGTH (type) = DW_UNSND (attr);
12357 TYPE_LENGTH (type) = cu_header->addr_size;
12359 return set_die_type (die, type, cu);
12362 static struct type *
12363 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
12365 struct type *base_type, *cv_type;
12367 base_type = die_type (die, cu);
12369 /* The die_type call above may have already set the type for this DIE. */
12370 cv_type = get_die_type (die, cu);
12374 /* In case the const qualifier is applied to an array type, the element type
12375 is so qualified, not the array type (section 6.7.3 of C99). */
12376 if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY)
12378 struct type *el_type, *inner_array;
12380 base_type = copy_type (base_type);
12381 inner_array = base_type;
12383 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
12385 TYPE_TARGET_TYPE (inner_array) =
12386 copy_type (TYPE_TARGET_TYPE (inner_array));
12387 inner_array = TYPE_TARGET_TYPE (inner_array);
12390 el_type = TYPE_TARGET_TYPE (inner_array);
12391 TYPE_TARGET_TYPE (inner_array) =
12392 make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL);
12394 return set_die_type (die, base_type, cu);
12397 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
12398 return set_die_type (die, cv_type, cu);
12401 static struct type *
12402 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
12404 struct type *base_type, *cv_type;
12406 base_type = die_type (die, cu);
12408 /* The die_type call above may have already set the type for this DIE. */
12409 cv_type = get_die_type (die, cu);
12413 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
12414 return set_die_type (die, cv_type, cu);
12417 /* Handle DW_TAG_restrict_type. */
12419 static struct type *
12420 read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu)
12422 struct type *base_type, *cv_type;
12424 base_type = die_type (die, cu);
12426 /* The die_type call above may have already set the type for this DIE. */
12427 cv_type = get_die_type (die, cu);
12431 cv_type = make_restrict_type (base_type);
12432 return set_die_type (die, cv_type, cu);
12435 /* Extract all information from a DW_TAG_string_type DIE and add to
12436 the user defined type vector. It isn't really a user defined type,
12437 but it behaves like one, with other DIE's using an AT_user_def_type
12438 attribute to reference it. */
12440 static struct type *
12441 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
12443 struct objfile *objfile = cu->objfile;
12444 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12445 struct type *type, *range_type, *index_type, *char_type;
12446 struct attribute *attr;
12447 unsigned int length;
12449 attr = dwarf2_attr (die, DW_AT_string_length, cu);
12452 length = DW_UNSND (attr);
12456 /* Check for the DW_AT_byte_size attribute. */
12457 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12460 length = DW_UNSND (attr);
12468 index_type = objfile_type (objfile)->builtin_int;
12469 range_type = create_range_type (NULL, index_type, 1, length);
12470 char_type = language_string_char_type (cu->language_defn, gdbarch);
12471 type = create_string_type (NULL, char_type, range_type);
12473 return set_die_type (die, type, cu);
12476 /* Handle DIES due to C code like:
12480 int (*funcp)(int a, long l);
12484 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12486 static struct type *
12487 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
12489 struct objfile *objfile = cu->objfile;
12490 struct type *type; /* Type that this function returns. */
12491 struct type *ftype; /* Function that returns above type. */
12492 struct attribute *attr;
12494 type = die_type (die, cu);
12496 /* The die_type call above may have already set the type for this DIE. */
12497 ftype = get_die_type (die, cu);
12501 ftype = lookup_function_type (type);
12503 /* All functions in C++, Pascal and Java have prototypes. */
12504 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
12505 if ((attr && (DW_UNSND (attr) != 0))
12506 || cu->language == language_cplus
12507 || cu->language == language_java
12508 || cu->language == language_pascal)
12509 TYPE_PROTOTYPED (ftype) = 1;
12510 else if (producer_is_realview (cu->producer))
12511 /* RealView does not emit DW_AT_prototyped. We can not
12512 distinguish prototyped and unprototyped functions; default to
12513 prototyped, since that is more common in modern code (and
12514 RealView warns about unprototyped functions). */
12515 TYPE_PROTOTYPED (ftype) = 1;
12517 /* Store the calling convention in the type if it's available in
12518 the subroutine die. Otherwise set the calling convention to
12519 the default value DW_CC_normal. */
12520 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
12522 TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr);
12523 else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL"))
12524 TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL;
12526 TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal;
12528 /* We need to add the subroutine type to the die immediately so
12529 we don't infinitely recurse when dealing with parameters
12530 declared as the same subroutine type. */
12531 set_die_type (die, ftype, cu);
12533 if (die->child != NULL)
12535 struct type *void_type = objfile_type (objfile)->builtin_void;
12536 struct die_info *child_die;
12537 int nparams, iparams;
12539 /* Count the number of parameters.
12540 FIXME: GDB currently ignores vararg functions, but knows about
12541 vararg member functions. */
12543 child_die = die->child;
12544 while (child_die && child_die->tag)
12546 if (child_die->tag == DW_TAG_formal_parameter)
12548 else if (child_die->tag == DW_TAG_unspecified_parameters)
12549 TYPE_VARARGS (ftype) = 1;
12550 child_die = sibling_die (child_die);
12553 /* Allocate storage for parameters and fill them in. */
12554 TYPE_NFIELDS (ftype) = nparams;
12555 TYPE_FIELDS (ftype) = (struct field *)
12556 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
12558 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12559 even if we error out during the parameters reading below. */
12560 for (iparams = 0; iparams < nparams; iparams++)
12561 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
12564 child_die = die->child;
12565 while (child_die && child_die->tag)
12567 if (child_die->tag == DW_TAG_formal_parameter)
12569 struct type *arg_type;
12571 /* DWARF version 2 has no clean way to discern C++
12572 static and non-static member functions. G++ helps
12573 GDB by marking the first parameter for non-static
12574 member functions (which is the this pointer) as
12575 artificial. We pass this information to
12576 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12578 DWARF version 3 added DW_AT_object_pointer, which GCC
12579 4.5 does not yet generate. */
12580 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
12582 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
12585 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
12587 /* GCC/43521: In java, the formal parameter
12588 "this" is sometimes not marked with DW_AT_artificial. */
12589 if (cu->language == language_java)
12591 const char *name = dwarf2_name (child_die, cu);
12593 if (name && !strcmp (name, "this"))
12594 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
12597 arg_type = die_type (child_die, cu);
12599 /* RealView does not mark THIS as const, which the testsuite
12600 expects. GCC marks THIS as const in method definitions,
12601 but not in the class specifications (GCC PR 43053). */
12602 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
12603 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
12606 struct dwarf2_cu *arg_cu = cu;
12607 const char *name = dwarf2_name (child_die, cu);
12609 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
12612 /* If the compiler emits this, use it. */
12613 if (follow_die_ref (die, attr, &arg_cu) == child_die)
12616 else if (name && strcmp (name, "this") == 0)
12617 /* Function definitions will have the argument names. */
12619 else if (name == NULL && iparams == 0)
12620 /* Declarations may not have the names, so like
12621 elsewhere in GDB, assume an artificial first
12622 argument is "this". */
12626 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
12630 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
12633 child_die = sibling_die (child_die);
12640 static struct type *
12641 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
12643 struct objfile *objfile = cu->objfile;
12644 const char *name = NULL;
12645 struct type *this_type, *target_type;
12647 name = dwarf2_full_name (NULL, die, cu);
12648 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
12649 TYPE_FLAG_TARGET_STUB, NULL, objfile);
12650 TYPE_NAME (this_type) = name;
12651 set_die_type (die, this_type, cu);
12652 target_type = die_type (die, cu);
12653 if (target_type != this_type)
12654 TYPE_TARGET_TYPE (this_type) = target_type;
12657 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12658 spec and cause infinite loops in GDB. */
12659 complaint (&symfile_complaints,
12660 _("Self-referential DW_TAG_typedef "
12661 "- DIE at 0x%x [in module %s]"),
12662 die->offset.sect_off, objfile->name);
12663 TYPE_TARGET_TYPE (this_type) = NULL;
12668 /* Find a representation of a given base type and install
12669 it in the TYPE field of the die. */
12671 static struct type *
12672 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
12674 struct objfile *objfile = cu->objfile;
12676 struct attribute *attr;
12677 int encoding = 0, size = 0;
12679 enum type_code code = TYPE_CODE_INT;
12680 int type_flags = 0;
12681 struct type *target_type = NULL;
12683 attr = dwarf2_attr (die, DW_AT_encoding, cu);
12686 encoding = DW_UNSND (attr);
12688 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12691 size = DW_UNSND (attr);
12693 name = dwarf2_name (die, cu);
12696 complaint (&symfile_complaints,
12697 _("DW_AT_name missing from DW_TAG_base_type"));
12702 case DW_ATE_address:
12703 /* Turn DW_ATE_address into a void * pointer. */
12704 code = TYPE_CODE_PTR;
12705 type_flags |= TYPE_FLAG_UNSIGNED;
12706 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
12708 case DW_ATE_boolean:
12709 code = TYPE_CODE_BOOL;
12710 type_flags |= TYPE_FLAG_UNSIGNED;
12712 case DW_ATE_complex_float:
12713 code = TYPE_CODE_COMPLEX;
12714 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
12716 case DW_ATE_decimal_float:
12717 code = TYPE_CODE_DECFLOAT;
12720 code = TYPE_CODE_FLT;
12722 case DW_ATE_signed:
12724 case DW_ATE_unsigned:
12725 type_flags |= TYPE_FLAG_UNSIGNED;
12726 if (cu->language == language_fortran
12728 && strncmp (name, "character(", sizeof ("character(") - 1) == 0)
12729 code = TYPE_CODE_CHAR;
12731 case DW_ATE_signed_char:
12732 if (cu->language == language_ada || cu->language == language_m2
12733 || cu->language == language_pascal
12734 || cu->language == language_fortran)
12735 code = TYPE_CODE_CHAR;
12737 case DW_ATE_unsigned_char:
12738 if (cu->language == language_ada || cu->language == language_m2
12739 || cu->language == language_pascal
12740 || cu->language == language_fortran)
12741 code = TYPE_CODE_CHAR;
12742 type_flags |= TYPE_FLAG_UNSIGNED;
12745 /* We just treat this as an integer and then recognize the
12746 type by name elsewhere. */
12750 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
12751 dwarf_type_encoding_name (encoding));
12755 type = init_type (code, size, type_flags, NULL, objfile);
12756 TYPE_NAME (type) = name;
12757 TYPE_TARGET_TYPE (type) = target_type;
12759 if (name && strcmp (name, "char") == 0)
12760 TYPE_NOSIGN (type) = 1;
12762 return set_die_type (die, type, cu);
12765 /* Read the given DW_AT_subrange DIE. */
12767 static struct type *
12768 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
12770 struct type *base_type, *orig_base_type;
12771 struct type *range_type;
12772 struct attribute *attr;
12774 int low_default_is_valid;
12776 LONGEST negative_mask;
12778 orig_base_type = die_type (die, cu);
12779 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
12780 whereas the real type might be. So, we use ORIG_BASE_TYPE when
12781 creating the range type, but we use the result of check_typedef
12782 when examining properties of the type. */
12783 base_type = check_typedef (orig_base_type);
12785 /* The die_type call above may have already set the type for this DIE. */
12786 range_type = get_die_type (die, cu);
12790 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12791 omitting DW_AT_lower_bound. */
12792 switch (cu->language)
12795 case language_cplus:
12797 low_default_is_valid = 1;
12799 case language_fortran:
12801 low_default_is_valid = 1;
12804 case language_java:
12805 case language_objc:
12807 low_default_is_valid = (cu->header.version >= 4);
12811 case language_pascal:
12813 low_default_is_valid = (cu->header.version >= 4);
12817 low_default_is_valid = 0;
12821 /* FIXME: For variable sized arrays either of these could be
12822 a variable rather than a constant value. We'll allow it,
12823 but we don't know how to handle it. */
12824 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
12826 low = dwarf2_get_attr_constant_value (attr, low);
12827 else if (!low_default_is_valid)
12828 complaint (&symfile_complaints, _("Missing DW_AT_lower_bound "
12829 "- DIE at 0x%x [in module %s]"),
12830 die->offset.sect_off, cu->objfile->name);
12832 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
12835 if (attr_form_is_block (attr) || is_ref_attr (attr))
12837 /* GCC encodes arrays with unspecified or dynamic length
12838 with a DW_FORM_block1 attribute or a reference attribute.
12839 FIXME: GDB does not yet know how to handle dynamic
12840 arrays properly, treat them as arrays with unspecified
12843 FIXME: jimb/2003-09-22: GDB does not really know
12844 how to handle arrays of unspecified length
12845 either; we just represent them as zero-length
12846 arrays. Choose an appropriate upper bound given
12847 the lower bound we've computed above. */
12851 high = dwarf2_get_attr_constant_value (attr, 1);
12855 attr = dwarf2_attr (die, DW_AT_count, cu);
12858 int count = dwarf2_get_attr_constant_value (attr, 1);
12859 high = low + count - 1;
12863 /* Unspecified array length. */
12868 /* Dwarf-2 specifications explicitly allows to create subrange types
12869 without specifying a base type.
12870 In that case, the base type must be set to the type of
12871 the lower bound, upper bound or count, in that order, if any of these
12872 three attributes references an object that has a type.
12873 If no base type is found, the Dwarf-2 specifications say that
12874 a signed integer type of size equal to the size of an address should
12876 For the following C code: `extern char gdb_int [];'
12877 GCC produces an empty range DIE.
12878 FIXME: muller/2010-05-28: Possible references to object for low bound,
12879 high bound or count are not yet handled by this code. */
12880 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
12882 struct objfile *objfile = cu->objfile;
12883 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12884 int addr_size = gdbarch_addr_bit (gdbarch) /8;
12885 struct type *int_type = objfile_type (objfile)->builtin_int;
12887 /* Test "int", "long int", and "long long int" objfile types,
12888 and select the first one having a size above or equal to the
12889 architecture address size. */
12890 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
12891 base_type = int_type;
12894 int_type = objfile_type (objfile)->builtin_long;
12895 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
12896 base_type = int_type;
12899 int_type = objfile_type (objfile)->builtin_long_long;
12900 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
12901 base_type = int_type;
12907 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
12908 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
12909 low |= negative_mask;
12910 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
12911 high |= negative_mask;
12913 range_type = create_range_type (NULL, orig_base_type, low, high);
12915 /* Mark arrays with dynamic length at least as an array of unspecified
12916 length. GDB could check the boundary but before it gets implemented at
12917 least allow accessing the array elements. */
12918 if (attr && attr_form_is_block (attr))
12919 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
12921 /* Ada expects an empty array on no boundary attributes. */
12922 if (attr == NULL && cu->language != language_ada)
12923 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
12925 name = dwarf2_name (die, cu);
12927 TYPE_NAME (range_type) = name;
12929 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12931 TYPE_LENGTH (range_type) = DW_UNSND (attr);
12933 set_die_type (die, range_type, cu);
12935 /* set_die_type should be already done. */
12936 set_descriptive_type (range_type, die, cu);
12941 static struct type *
12942 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
12946 /* For now, we only support the C meaning of an unspecified type: void. */
12948 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
12949 TYPE_NAME (type) = dwarf2_name (die, cu);
12951 return set_die_type (die, type, cu);
12954 /* Read a single die and all its descendents. Set the die's sibling
12955 field to NULL; set other fields in the die correctly, and set all
12956 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12957 location of the info_ptr after reading all of those dies. PARENT
12958 is the parent of the die in question. */
12960 static struct die_info *
12961 read_die_and_children (const struct die_reader_specs *reader,
12962 gdb_byte *info_ptr,
12963 gdb_byte **new_info_ptr,
12964 struct die_info *parent)
12966 struct die_info *die;
12970 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
12973 *new_info_ptr = cur_ptr;
12976 store_in_ref_table (die, reader->cu);
12979 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
12983 *new_info_ptr = cur_ptr;
12986 die->sibling = NULL;
12987 die->parent = parent;
12991 /* Read a die, all of its descendents, and all of its siblings; set
12992 all of the fields of all of the dies correctly. Arguments are as
12993 in read_die_and_children. */
12995 static struct die_info *
12996 read_die_and_siblings (const struct die_reader_specs *reader,
12997 gdb_byte *info_ptr,
12998 gdb_byte **new_info_ptr,
12999 struct die_info *parent)
13001 struct die_info *first_die, *last_sibling;
13004 cur_ptr = info_ptr;
13005 first_die = last_sibling = NULL;
13009 struct die_info *die
13010 = read_die_and_children (reader, cur_ptr, &cur_ptr, parent);
13014 *new_info_ptr = cur_ptr;
13021 last_sibling->sibling = die;
13023 last_sibling = die;
13027 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
13029 The caller is responsible for filling in the extra attributes
13030 and updating (*DIEP)->num_attrs.
13031 Set DIEP to point to a newly allocated die with its information,
13032 except for its child, sibling, and parent fields.
13033 Set HAS_CHILDREN to tell whether the die has children or not. */
13036 read_full_die_1 (const struct die_reader_specs *reader,
13037 struct die_info **diep, gdb_byte *info_ptr,
13038 int *has_children, int num_extra_attrs)
13040 unsigned int abbrev_number, bytes_read, i;
13041 sect_offset offset;
13042 struct abbrev_info *abbrev;
13043 struct die_info *die;
13044 struct dwarf2_cu *cu = reader->cu;
13045 bfd *abfd = reader->abfd;
13047 offset.sect_off = info_ptr - reader->buffer;
13048 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
13049 info_ptr += bytes_read;
13050 if (!abbrev_number)
13057 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
13059 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
13061 bfd_get_filename (abfd));
13063 die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs);
13064 die->offset = offset;
13065 die->tag = abbrev->tag;
13066 die->abbrev = abbrev_number;
13068 /* Make the result usable.
13069 The caller needs to update num_attrs after adding the extra
13071 die->num_attrs = abbrev->num_attrs;
13073 for (i = 0; i < abbrev->num_attrs; ++i)
13074 info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i],
13078 *has_children = abbrev->has_children;
13082 /* Read a die and all its attributes.
13083 Set DIEP to point to a newly allocated die with its information,
13084 except for its child, sibling, and parent fields.
13085 Set HAS_CHILDREN to tell whether the die has children or not. */
13088 read_full_die (const struct die_reader_specs *reader,
13089 struct die_info **diep, gdb_byte *info_ptr,
13092 return read_full_die_1 (reader, diep, info_ptr, has_children, 0);
13095 /* Abbreviation tables.
13097 In DWARF version 2, the description of the debugging information is
13098 stored in a separate .debug_abbrev section. Before we read any
13099 dies from a section we read in all abbreviations and install them
13100 in a hash table. */
13102 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
13104 static struct abbrev_info *
13105 abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table)
13107 struct abbrev_info *abbrev;
13109 abbrev = (struct abbrev_info *)
13110 obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info));
13111 memset (abbrev, 0, sizeof (struct abbrev_info));
13115 /* Add an abbreviation to the table. */
13118 abbrev_table_add_abbrev (struct abbrev_table *abbrev_table,
13119 unsigned int abbrev_number,
13120 struct abbrev_info *abbrev)
13122 unsigned int hash_number;
13124 hash_number = abbrev_number % ABBREV_HASH_SIZE;
13125 abbrev->next = abbrev_table->abbrevs[hash_number];
13126 abbrev_table->abbrevs[hash_number] = abbrev;
13129 /* Look up an abbrev in the table.
13130 Returns NULL if the abbrev is not found. */
13132 static struct abbrev_info *
13133 abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table,
13134 unsigned int abbrev_number)
13136 unsigned int hash_number;
13137 struct abbrev_info *abbrev;
13139 hash_number = abbrev_number % ABBREV_HASH_SIZE;
13140 abbrev = abbrev_table->abbrevs[hash_number];
13144 if (abbrev->number == abbrev_number)
13146 abbrev = abbrev->next;
13151 /* Read in an abbrev table. */
13153 static struct abbrev_table *
13154 abbrev_table_read_table (struct dwarf2_section_info *section,
13155 sect_offset offset)
13157 struct objfile *objfile = dwarf2_per_objfile->objfile;
13158 bfd *abfd = section->asection->owner;
13159 struct abbrev_table *abbrev_table;
13160 gdb_byte *abbrev_ptr;
13161 struct abbrev_info *cur_abbrev;
13162 unsigned int abbrev_number, bytes_read, abbrev_name;
13163 unsigned int abbrev_form;
13164 struct attr_abbrev *cur_attrs;
13165 unsigned int allocated_attrs;
13167 abbrev_table = XMALLOC (struct abbrev_table);
13168 abbrev_table->offset = offset;
13169 obstack_init (&abbrev_table->abbrev_obstack);
13170 abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack,
13172 * sizeof (struct abbrev_info *)));
13173 memset (abbrev_table->abbrevs, 0,
13174 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
13176 dwarf2_read_section (objfile, section);
13177 abbrev_ptr = section->buffer + offset.sect_off;
13178 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13179 abbrev_ptr += bytes_read;
13181 allocated_attrs = ATTR_ALLOC_CHUNK;
13182 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
13184 /* Loop until we reach an abbrev number of 0. */
13185 while (abbrev_number)
13187 cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table);
13189 /* read in abbrev header */
13190 cur_abbrev->number = abbrev_number;
13191 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13192 abbrev_ptr += bytes_read;
13193 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
13196 /* now read in declarations */
13197 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13198 abbrev_ptr += bytes_read;
13199 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13200 abbrev_ptr += bytes_read;
13201 while (abbrev_name)
13203 if (cur_abbrev->num_attrs == allocated_attrs)
13205 allocated_attrs += ATTR_ALLOC_CHUNK;
13207 = xrealloc (cur_attrs, (allocated_attrs
13208 * sizeof (struct attr_abbrev)));
13211 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
13212 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
13213 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13214 abbrev_ptr += bytes_read;
13215 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13216 abbrev_ptr += bytes_read;
13219 cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack,
13220 (cur_abbrev->num_attrs
13221 * sizeof (struct attr_abbrev)));
13222 memcpy (cur_abbrev->attrs, cur_attrs,
13223 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
13225 abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev);
13227 /* Get next abbreviation.
13228 Under Irix6 the abbreviations for a compilation unit are not
13229 always properly terminated with an abbrev number of 0.
13230 Exit loop if we encounter an abbreviation which we have
13231 already read (which means we are about to read the abbreviations
13232 for the next compile unit) or if the end of the abbreviation
13233 table is reached. */
13234 if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size)
13236 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13237 abbrev_ptr += bytes_read;
13238 if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL)
13243 return abbrev_table;
13246 /* Free the resources held by ABBREV_TABLE. */
13249 abbrev_table_free (struct abbrev_table *abbrev_table)
13251 obstack_free (&abbrev_table->abbrev_obstack, NULL);
13252 xfree (abbrev_table);
13255 /* Same as abbrev_table_free but as a cleanup.
13256 We pass in a pointer to the pointer to the table so that we can
13257 set the pointer to NULL when we're done. It also simplifies
13258 build_type_unit_groups. */
13261 abbrev_table_free_cleanup (void *table_ptr)
13263 struct abbrev_table **abbrev_table_ptr = table_ptr;
13265 if (*abbrev_table_ptr != NULL)
13266 abbrev_table_free (*abbrev_table_ptr);
13267 *abbrev_table_ptr = NULL;
13270 /* Read the abbrev table for CU from ABBREV_SECTION. */
13273 dwarf2_read_abbrevs (struct dwarf2_cu *cu,
13274 struct dwarf2_section_info *abbrev_section)
13277 abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset);
13280 /* Release the memory used by the abbrev table for a compilation unit. */
13283 dwarf2_free_abbrev_table (void *ptr_to_cu)
13285 struct dwarf2_cu *cu = ptr_to_cu;
13287 abbrev_table_free (cu->abbrev_table);
13288 /* Set this to NULL so that we SEGV if we try to read it later,
13289 and also because free_comp_unit verifies this is NULL. */
13290 cu->abbrev_table = NULL;
13293 /* Returns nonzero if TAG represents a type that we might generate a partial
13297 is_type_tag_for_partial (int tag)
13302 /* Some types that would be reasonable to generate partial symbols for,
13303 that we don't at present. */
13304 case DW_TAG_array_type:
13305 case DW_TAG_file_type:
13306 case DW_TAG_ptr_to_member_type:
13307 case DW_TAG_set_type:
13308 case DW_TAG_string_type:
13309 case DW_TAG_subroutine_type:
13311 case DW_TAG_base_type:
13312 case DW_TAG_class_type:
13313 case DW_TAG_interface_type:
13314 case DW_TAG_enumeration_type:
13315 case DW_TAG_structure_type:
13316 case DW_TAG_subrange_type:
13317 case DW_TAG_typedef:
13318 case DW_TAG_union_type:
13325 /* Load all DIEs that are interesting for partial symbols into memory. */
13327 static struct partial_die_info *
13328 load_partial_dies (const struct die_reader_specs *reader,
13329 gdb_byte *info_ptr, int building_psymtab)
13331 struct dwarf2_cu *cu = reader->cu;
13332 struct objfile *objfile = cu->objfile;
13333 struct partial_die_info *part_die;
13334 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
13335 struct abbrev_info *abbrev;
13336 unsigned int bytes_read;
13337 unsigned int load_all = 0;
13338 int nesting_level = 1;
13343 gdb_assert (cu->per_cu != NULL);
13344 if (cu->per_cu->load_all_dies)
13348 = htab_create_alloc_ex (cu->header.length / 12,
13352 &cu->comp_unit_obstack,
13353 hashtab_obstack_allocate,
13354 dummy_obstack_deallocate);
13356 part_die = obstack_alloc (&cu->comp_unit_obstack,
13357 sizeof (struct partial_die_info));
13361 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
13363 /* A NULL abbrev means the end of a series of children. */
13364 if (abbrev == NULL)
13366 if (--nesting_level == 0)
13368 /* PART_DIE was probably the last thing allocated on the
13369 comp_unit_obstack, so we could call obstack_free
13370 here. We don't do that because the waste is small,
13371 and will be cleaned up when we're done with this
13372 compilation unit. This way, we're also more robust
13373 against other users of the comp_unit_obstack. */
13376 info_ptr += bytes_read;
13377 last_die = parent_die;
13378 parent_die = parent_die->die_parent;
13382 /* Check for template arguments. We never save these; if
13383 they're seen, we just mark the parent, and go on our way. */
13384 if (parent_die != NULL
13385 && cu->language == language_cplus
13386 && (abbrev->tag == DW_TAG_template_type_param
13387 || abbrev->tag == DW_TAG_template_value_param))
13389 parent_die->has_template_arguments = 1;
13393 /* We don't need a partial DIE for the template argument. */
13394 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
13399 /* We only recurse into c++ subprograms looking for template arguments.
13400 Skip their other children. */
13402 && cu->language == language_cplus
13403 && parent_die != NULL
13404 && parent_die->tag == DW_TAG_subprogram)
13406 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
13410 /* Check whether this DIE is interesting enough to save. Normally
13411 we would not be interested in members here, but there may be
13412 later variables referencing them via DW_AT_specification (for
13413 static members). */
13415 && !is_type_tag_for_partial (abbrev->tag)
13416 && abbrev->tag != DW_TAG_constant
13417 && abbrev->tag != DW_TAG_enumerator
13418 && abbrev->tag != DW_TAG_subprogram
13419 && abbrev->tag != DW_TAG_lexical_block
13420 && abbrev->tag != DW_TAG_variable
13421 && abbrev->tag != DW_TAG_namespace
13422 && abbrev->tag != DW_TAG_module
13423 && abbrev->tag != DW_TAG_member
13424 && abbrev->tag != DW_TAG_imported_unit)
13426 /* Otherwise we skip to the next sibling, if any. */
13427 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
13431 info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read,
13434 /* This two-pass algorithm for processing partial symbols has a
13435 high cost in cache pressure. Thus, handle some simple cases
13436 here which cover the majority of C partial symbols. DIEs
13437 which neither have specification tags in them, nor could have
13438 specification tags elsewhere pointing at them, can simply be
13439 processed and discarded.
13441 This segment is also optional; scan_partial_symbols and
13442 add_partial_symbol will handle these DIEs if we chain
13443 them in normally. When compilers which do not emit large
13444 quantities of duplicate debug information are more common,
13445 this code can probably be removed. */
13447 /* Any complete simple types at the top level (pretty much all
13448 of them, for a language without namespaces), can be processed
13450 if (parent_die == NULL
13451 && part_die->has_specification == 0
13452 && part_die->is_declaration == 0
13453 && ((part_die->tag == DW_TAG_typedef && !part_die->has_children)
13454 || part_die->tag == DW_TAG_base_type
13455 || part_die->tag == DW_TAG_subrange_type))
13457 if (building_psymtab && part_die->name != NULL)
13458 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
13459 VAR_DOMAIN, LOC_TYPEDEF,
13460 &objfile->static_psymbols,
13461 0, (CORE_ADDR) 0, cu->language, objfile);
13462 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
13466 /* The exception for DW_TAG_typedef with has_children above is
13467 a workaround of GCC PR debug/47510. In the case of this complaint
13468 type_name_no_tag_or_error will error on such types later.
13470 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13471 it could not find the child DIEs referenced later, this is checked
13472 above. In correct DWARF DW_TAG_typedef should have no children. */
13474 if (part_die->tag == DW_TAG_typedef && part_die->has_children)
13475 complaint (&symfile_complaints,
13476 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13477 "- DIE at 0x%x [in module %s]"),
13478 part_die->offset.sect_off, objfile->name);
13480 /* If we're at the second level, and we're an enumerator, and
13481 our parent has no specification (meaning possibly lives in a
13482 namespace elsewhere), then we can add the partial symbol now
13483 instead of queueing it. */
13484 if (part_die->tag == DW_TAG_enumerator
13485 && parent_die != NULL
13486 && parent_die->die_parent == NULL
13487 && parent_die->tag == DW_TAG_enumeration_type
13488 && parent_die->has_specification == 0)
13490 if (part_die->name == NULL)
13491 complaint (&symfile_complaints,
13492 _("malformed enumerator DIE ignored"));
13493 else if (building_psymtab)
13494 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
13495 VAR_DOMAIN, LOC_CONST,
13496 (cu->language == language_cplus
13497 || cu->language == language_java)
13498 ? &objfile->global_psymbols
13499 : &objfile->static_psymbols,
13500 0, (CORE_ADDR) 0, cu->language, objfile);
13502 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
13506 /* We'll save this DIE so link it in. */
13507 part_die->die_parent = parent_die;
13508 part_die->die_sibling = NULL;
13509 part_die->die_child = NULL;
13511 if (last_die && last_die == parent_die)
13512 last_die->die_child = part_die;
13514 last_die->die_sibling = part_die;
13516 last_die = part_die;
13518 if (first_die == NULL)
13519 first_die = part_die;
13521 /* Maybe add the DIE to the hash table. Not all DIEs that we
13522 find interesting need to be in the hash table, because we
13523 also have the parent/sibling/child chains; only those that we
13524 might refer to by offset later during partial symbol reading.
13526 For now this means things that might have be the target of a
13527 DW_AT_specification, DW_AT_abstract_origin, or
13528 DW_AT_extension. DW_AT_extension will refer only to
13529 namespaces; DW_AT_abstract_origin refers to functions (and
13530 many things under the function DIE, but we do not recurse
13531 into function DIEs during partial symbol reading) and
13532 possibly variables as well; DW_AT_specification refers to
13533 declarations. Declarations ought to have the DW_AT_declaration
13534 flag. It happens that GCC forgets to put it in sometimes, but
13535 only for functions, not for types.
13537 Adding more things than necessary to the hash table is harmless
13538 except for the performance cost. Adding too few will result in
13539 wasted time in find_partial_die, when we reread the compilation
13540 unit with load_all_dies set. */
13543 || abbrev->tag == DW_TAG_constant
13544 || abbrev->tag == DW_TAG_subprogram
13545 || abbrev->tag == DW_TAG_variable
13546 || abbrev->tag == DW_TAG_namespace
13547 || part_die->is_declaration)
13551 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
13552 part_die->offset.sect_off, INSERT);
13556 part_die = obstack_alloc (&cu->comp_unit_obstack,
13557 sizeof (struct partial_die_info));
13559 /* For some DIEs we want to follow their children (if any). For C
13560 we have no reason to follow the children of structures; for other
13561 languages we have to, so that we can get at method physnames
13562 to infer fully qualified class names, for DW_AT_specification,
13563 and for C++ template arguments. For C++, we also look one level
13564 inside functions to find template arguments (if the name of the
13565 function does not already contain the template arguments).
13567 For Ada, we need to scan the children of subprograms and lexical
13568 blocks as well because Ada allows the definition of nested
13569 entities that could be interesting for the debugger, such as
13570 nested subprograms for instance. */
13571 if (last_die->has_children
13573 || last_die->tag == DW_TAG_namespace
13574 || last_die->tag == DW_TAG_module
13575 || last_die->tag == DW_TAG_enumeration_type
13576 || (cu->language == language_cplus
13577 && last_die->tag == DW_TAG_subprogram
13578 && (last_die->name == NULL
13579 || strchr (last_die->name, '<') == NULL))
13580 || (cu->language != language_c
13581 && (last_die->tag == DW_TAG_class_type
13582 || last_die->tag == DW_TAG_interface_type
13583 || last_die->tag == DW_TAG_structure_type
13584 || last_die->tag == DW_TAG_union_type))
13585 || (cu->language == language_ada
13586 && (last_die->tag == DW_TAG_subprogram
13587 || last_die->tag == DW_TAG_lexical_block))))
13590 parent_die = last_die;
13594 /* Otherwise we skip to the next sibling, if any. */
13595 info_ptr = locate_pdi_sibling (reader, last_die, info_ptr);
13597 /* Back to the top, do it again. */
13601 /* Read a minimal amount of information into the minimal die structure. */
13604 read_partial_die (const struct die_reader_specs *reader,
13605 struct partial_die_info *part_die,
13606 struct abbrev_info *abbrev, unsigned int abbrev_len,
13607 gdb_byte *info_ptr)
13609 struct dwarf2_cu *cu = reader->cu;
13610 struct objfile *objfile = cu->objfile;
13611 gdb_byte *buffer = reader->buffer;
13613 struct attribute attr;
13614 int has_low_pc_attr = 0;
13615 int has_high_pc_attr = 0;
13616 int high_pc_relative = 0;
13618 memset (part_die, 0, sizeof (struct partial_die_info));
13620 part_die->offset.sect_off = info_ptr - buffer;
13622 info_ptr += abbrev_len;
13624 if (abbrev == NULL)
13627 part_die->tag = abbrev->tag;
13628 part_die->has_children = abbrev->has_children;
13630 for (i = 0; i < abbrev->num_attrs; ++i)
13632 info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
13634 /* Store the data if it is of an attribute we want to keep in a
13635 partial symbol table. */
13639 switch (part_die->tag)
13641 case DW_TAG_compile_unit:
13642 case DW_TAG_partial_unit:
13643 case DW_TAG_type_unit:
13644 /* Compilation units have a DW_AT_name that is a filename, not
13645 a source language identifier. */
13646 case DW_TAG_enumeration_type:
13647 case DW_TAG_enumerator:
13648 /* These tags always have simple identifiers already; no need
13649 to canonicalize them. */
13650 part_die->name = DW_STRING (&attr);
13654 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
13655 &objfile->objfile_obstack);
13659 case DW_AT_linkage_name:
13660 case DW_AT_MIPS_linkage_name:
13661 /* Note that both forms of linkage name might appear. We
13662 assume they will be the same, and we only store the last
13664 if (cu->language == language_ada)
13665 part_die->name = DW_STRING (&attr);
13666 part_die->linkage_name = DW_STRING (&attr);
13669 has_low_pc_attr = 1;
13670 part_die->lowpc = DW_ADDR (&attr);
13672 case DW_AT_high_pc:
13673 has_high_pc_attr = 1;
13674 if (attr.form == DW_FORM_addr
13675 || attr.form == DW_FORM_GNU_addr_index)
13676 part_die->highpc = DW_ADDR (&attr);
13679 high_pc_relative = 1;
13680 part_die->highpc = DW_UNSND (&attr);
13683 case DW_AT_location:
13684 /* Support the .debug_loc offsets. */
13685 if (attr_form_is_block (&attr))
13687 part_die->d.locdesc = DW_BLOCK (&attr);
13689 else if (attr_form_is_section_offset (&attr))
13691 dwarf2_complex_location_expr_complaint ();
13695 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13696 "partial symbol information");
13699 case DW_AT_external:
13700 part_die->is_external = DW_UNSND (&attr);
13702 case DW_AT_declaration:
13703 part_die->is_declaration = DW_UNSND (&attr);
13706 part_die->has_type = 1;
13708 case DW_AT_abstract_origin:
13709 case DW_AT_specification:
13710 case DW_AT_extension:
13711 part_die->has_specification = 1;
13712 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
13713 part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt
13714 || cu->per_cu->is_dwz);
13716 case DW_AT_sibling:
13717 /* Ignore absolute siblings, they might point outside of
13718 the current compile unit. */
13719 if (attr.form == DW_FORM_ref_addr)
13720 complaint (&symfile_complaints,
13721 _("ignoring absolute DW_AT_sibling"));
13723 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
13725 case DW_AT_byte_size:
13726 part_die->has_byte_size = 1;
13728 case DW_AT_calling_convention:
13729 /* DWARF doesn't provide a way to identify a program's source-level
13730 entry point. DW_AT_calling_convention attributes are only meant
13731 to describe functions' calling conventions.
13733 However, because it's a necessary piece of information in
13734 Fortran, and because DW_CC_program is the only piece of debugging
13735 information whose definition refers to a 'main program' at all,
13736 several compilers have begun marking Fortran main programs with
13737 DW_CC_program --- even when those functions use the standard
13738 calling conventions.
13740 So until DWARF specifies a way to provide this information and
13741 compilers pick up the new representation, we'll support this
13743 if (DW_UNSND (&attr) == DW_CC_program
13744 && cu->language == language_fortran)
13746 set_main_name (part_die->name);
13748 /* As this DIE has a static linkage the name would be difficult
13749 to look up later. */
13750 language_of_main = language_fortran;
13754 if (DW_UNSND (&attr) == DW_INL_inlined
13755 || DW_UNSND (&attr) == DW_INL_declared_inlined)
13756 part_die->may_be_inlined = 1;
13760 if (part_die->tag == DW_TAG_imported_unit)
13762 part_die->d.offset = dwarf2_get_ref_die_offset (&attr);
13763 part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt
13764 || cu->per_cu->is_dwz);
13773 if (high_pc_relative)
13774 part_die->highpc += part_die->lowpc;
13776 if (has_low_pc_attr && has_high_pc_attr)
13778 /* When using the GNU linker, .gnu.linkonce. sections are used to
13779 eliminate duplicate copies of functions and vtables and such.
13780 The linker will arbitrarily choose one and discard the others.
13781 The AT_*_pc values for such functions refer to local labels in
13782 these sections. If the section from that file was discarded, the
13783 labels are not in the output, so the relocs get a value of 0.
13784 If this is a discarded function, mark the pc bounds as invalid,
13785 so that GDB will ignore it. */
13786 if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero)
13788 struct gdbarch *gdbarch = get_objfile_arch (objfile);
13790 complaint (&symfile_complaints,
13791 _("DW_AT_low_pc %s is zero "
13792 "for DIE at 0x%x [in module %s]"),
13793 paddress (gdbarch, part_die->lowpc),
13794 part_die->offset.sect_off, objfile->name);
13796 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13797 else if (part_die->lowpc >= part_die->highpc)
13799 struct gdbarch *gdbarch = get_objfile_arch (objfile);
13801 complaint (&symfile_complaints,
13802 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13803 "for DIE at 0x%x [in module %s]"),
13804 paddress (gdbarch, part_die->lowpc),
13805 paddress (gdbarch, part_die->highpc),
13806 part_die->offset.sect_off, objfile->name);
13809 part_die->has_pc_info = 1;
13815 /* Find a cached partial DIE at OFFSET in CU. */
13817 static struct partial_die_info *
13818 find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu)
13820 struct partial_die_info *lookup_die = NULL;
13821 struct partial_die_info part_die;
13823 part_die.offset = offset;
13824 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die,
13830 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13831 except in the case of .debug_types DIEs which do not reference
13832 outside their CU (they do however referencing other types via
13833 DW_FORM_ref_sig8). */
13835 static struct partial_die_info *
13836 find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu)
13838 struct objfile *objfile = cu->objfile;
13839 struct dwarf2_per_cu_data *per_cu = NULL;
13840 struct partial_die_info *pd = NULL;
13842 if (offset_in_dwz == cu->per_cu->is_dwz
13843 && offset_in_cu_p (&cu->header, offset))
13845 pd = find_partial_die_in_comp_unit (offset, cu);
13848 /* We missed recording what we needed.
13849 Load all dies and try again. */
13850 per_cu = cu->per_cu;
13854 /* TUs don't reference other CUs/TUs (except via type signatures). */
13855 if (cu->per_cu->is_debug_types)
13857 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13858 " external reference to offset 0x%lx [in module %s].\n"),
13859 (long) cu->header.offset.sect_off, (long) offset.sect_off,
13860 bfd_get_filename (objfile->obfd));
13862 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
13865 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
13866 load_partial_comp_unit (per_cu);
13868 per_cu->cu->last_used = 0;
13869 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
13872 /* If we didn't find it, and not all dies have been loaded,
13873 load them all and try again. */
13875 if (pd == NULL && per_cu->load_all_dies == 0)
13877 per_cu->load_all_dies = 1;
13879 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13880 THIS_CU->cu may already be in use. So we can't just free it and
13881 replace its DIEs with the ones we read in. Instead, we leave those
13882 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13883 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13885 load_partial_comp_unit (per_cu);
13887 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
13891 internal_error (__FILE__, __LINE__,
13892 _("could not find partial DIE 0x%x "
13893 "in cache [from module %s]\n"),
13894 offset.sect_off, bfd_get_filename (objfile->obfd));
13898 /* See if we can figure out if the class lives in a namespace. We do
13899 this by looking for a member function; its demangled name will
13900 contain namespace info, if there is any. */
13903 guess_partial_die_structure_name (struct partial_die_info *struct_pdi,
13904 struct dwarf2_cu *cu)
13906 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13907 what template types look like, because the demangler
13908 frequently doesn't give the same name as the debug info. We
13909 could fix this by only using the demangled name to get the
13910 prefix (but see comment in read_structure_type). */
13912 struct partial_die_info *real_pdi;
13913 struct partial_die_info *child_pdi;
13915 /* If this DIE (this DIE's specification, if any) has a parent, then
13916 we should not do this. We'll prepend the parent's fully qualified
13917 name when we create the partial symbol. */
13919 real_pdi = struct_pdi;
13920 while (real_pdi->has_specification)
13921 real_pdi = find_partial_die (real_pdi->spec_offset,
13922 real_pdi->spec_is_dwz, cu);
13924 if (real_pdi->die_parent != NULL)
13927 for (child_pdi = struct_pdi->die_child;
13929 child_pdi = child_pdi->die_sibling)
13931 if (child_pdi->tag == DW_TAG_subprogram
13932 && child_pdi->linkage_name != NULL)
13934 char *actual_class_name
13935 = language_class_name_from_physname (cu->language_defn,
13936 child_pdi->linkage_name);
13937 if (actual_class_name != NULL)
13940 = obstack_copy0 (&cu->objfile->objfile_obstack,
13942 strlen (actual_class_name));
13943 xfree (actual_class_name);
13950 /* Adjust PART_DIE before generating a symbol for it. This function
13951 may set the is_external flag or change the DIE's name. */
13954 fixup_partial_die (struct partial_die_info *part_die,
13955 struct dwarf2_cu *cu)
13957 /* Once we've fixed up a die, there's no point in doing so again.
13958 This also avoids a memory leak if we were to call
13959 guess_partial_die_structure_name multiple times. */
13960 if (part_die->fixup_called)
13963 /* If we found a reference attribute and the DIE has no name, try
13964 to find a name in the referred to DIE. */
13966 if (part_die->name == NULL && part_die->has_specification)
13968 struct partial_die_info *spec_die;
13970 spec_die = find_partial_die (part_die->spec_offset,
13971 part_die->spec_is_dwz, cu);
13973 fixup_partial_die (spec_die, cu);
13975 if (spec_die->name)
13977 part_die->name = spec_die->name;
13979 /* Copy DW_AT_external attribute if it is set. */
13980 if (spec_die->is_external)
13981 part_die->is_external = spec_die->is_external;
13985 /* Set default names for some unnamed DIEs. */
13987 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
13988 part_die->name = CP_ANONYMOUS_NAMESPACE_STR;
13990 /* If there is no parent die to provide a namespace, and there are
13991 children, see if we can determine the namespace from their linkage
13993 if (cu->language == language_cplus
13994 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
13995 && part_die->die_parent == NULL
13996 && part_die->has_children
13997 && (part_die->tag == DW_TAG_class_type
13998 || part_die->tag == DW_TAG_structure_type
13999 || part_die->tag == DW_TAG_union_type))
14000 guess_partial_die_structure_name (part_die, cu);
14002 /* GCC might emit a nameless struct or union that has a linkage
14003 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14004 if (part_die->name == NULL
14005 && (part_die->tag == DW_TAG_class_type
14006 || part_die->tag == DW_TAG_interface_type
14007 || part_die->tag == DW_TAG_structure_type
14008 || part_die->tag == DW_TAG_union_type)
14009 && part_die->linkage_name != NULL)
14013 demangled = cplus_demangle (part_die->linkage_name, DMGL_TYPES);
14018 /* Strip any leading namespaces/classes, keep only the base name.
14019 DW_AT_name for named DIEs does not contain the prefixes. */
14020 base = strrchr (demangled, ':');
14021 if (base && base > demangled && base[-1] == ':')
14026 part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack,
14027 base, strlen (base));
14032 part_die->fixup_called = 1;
14035 /* Read an attribute value described by an attribute form. */
14038 read_attribute_value (const struct die_reader_specs *reader,
14039 struct attribute *attr, unsigned form,
14040 gdb_byte *info_ptr)
14042 struct dwarf2_cu *cu = reader->cu;
14043 bfd *abfd = reader->abfd;
14044 struct comp_unit_head *cu_header = &cu->header;
14045 unsigned int bytes_read;
14046 struct dwarf_block *blk;
14051 case DW_FORM_ref_addr:
14052 if (cu->header.version == 2)
14053 DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
14055 DW_UNSND (attr) = read_offset (abfd, info_ptr,
14056 &cu->header, &bytes_read);
14057 info_ptr += bytes_read;
14059 case DW_FORM_GNU_ref_alt:
14060 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
14061 info_ptr += bytes_read;
14064 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
14065 info_ptr += bytes_read;
14067 case DW_FORM_block2:
14068 blk = dwarf_alloc_block (cu);
14069 blk->size = read_2_bytes (abfd, info_ptr);
14071 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14072 info_ptr += blk->size;
14073 DW_BLOCK (attr) = blk;
14075 case DW_FORM_block4:
14076 blk = dwarf_alloc_block (cu);
14077 blk->size = read_4_bytes (abfd, info_ptr);
14079 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14080 info_ptr += blk->size;
14081 DW_BLOCK (attr) = blk;
14083 case DW_FORM_data2:
14084 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
14087 case DW_FORM_data4:
14088 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
14091 case DW_FORM_data8:
14092 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
14095 case DW_FORM_sec_offset:
14096 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
14097 info_ptr += bytes_read;
14099 case DW_FORM_string:
14100 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
14101 DW_STRING_IS_CANONICAL (attr) = 0;
14102 info_ptr += bytes_read;
14105 if (!cu->per_cu->is_dwz)
14107 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
14109 DW_STRING_IS_CANONICAL (attr) = 0;
14110 info_ptr += bytes_read;
14114 case DW_FORM_GNU_strp_alt:
14116 struct dwz_file *dwz = dwarf2_get_dwz_file ();
14117 LONGEST str_offset = read_offset (abfd, info_ptr, cu_header,
14120 DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset);
14121 DW_STRING_IS_CANONICAL (attr) = 0;
14122 info_ptr += bytes_read;
14125 case DW_FORM_exprloc:
14126 case DW_FORM_block:
14127 blk = dwarf_alloc_block (cu);
14128 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14129 info_ptr += bytes_read;
14130 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14131 info_ptr += blk->size;
14132 DW_BLOCK (attr) = blk;
14134 case DW_FORM_block1:
14135 blk = dwarf_alloc_block (cu);
14136 blk->size = read_1_byte (abfd, info_ptr);
14138 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14139 info_ptr += blk->size;
14140 DW_BLOCK (attr) = blk;
14142 case DW_FORM_data1:
14143 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
14147 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
14150 case DW_FORM_flag_present:
14151 DW_UNSND (attr) = 1;
14153 case DW_FORM_sdata:
14154 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
14155 info_ptr += bytes_read;
14157 case DW_FORM_udata:
14158 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14159 info_ptr += bytes_read;
14162 DW_UNSND (attr) = (cu->header.offset.sect_off
14163 + read_1_byte (abfd, info_ptr));
14167 DW_UNSND (attr) = (cu->header.offset.sect_off
14168 + read_2_bytes (abfd, info_ptr));
14172 DW_UNSND (attr) = (cu->header.offset.sect_off
14173 + read_4_bytes (abfd, info_ptr));
14177 DW_UNSND (attr) = (cu->header.offset.sect_off
14178 + read_8_bytes (abfd, info_ptr));
14181 case DW_FORM_ref_sig8:
14182 /* Convert the signature to something we can record in DW_UNSND
14184 NOTE: This is NULL if the type wasn't found. */
14185 DW_SIGNATURED_TYPE (attr) =
14186 lookup_signatured_type (read_8_bytes (abfd, info_ptr));
14189 case DW_FORM_ref_udata:
14190 DW_UNSND (attr) = (cu->header.offset.sect_off
14191 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
14192 info_ptr += bytes_read;
14194 case DW_FORM_indirect:
14195 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14196 info_ptr += bytes_read;
14197 info_ptr = read_attribute_value (reader, attr, form, info_ptr);
14199 case DW_FORM_GNU_addr_index:
14200 if (reader->dwo_file == NULL)
14202 /* For now flag a hard error.
14203 Later we can turn this into a complaint. */
14204 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14205 dwarf_form_name (form),
14206 bfd_get_filename (abfd));
14208 DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read);
14209 info_ptr += bytes_read;
14211 case DW_FORM_GNU_str_index:
14212 if (reader->dwo_file == NULL)
14214 /* For now flag a hard error.
14215 Later we can turn this into a complaint if warranted. */
14216 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14217 dwarf_form_name (form),
14218 bfd_get_filename (abfd));
14221 ULONGEST str_index =
14222 read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14224 DW_STRING (attr) = read_str_index (reader, cu, str_index);
14225 DW_STRING_IS_CANONICAL (attr) = 0;
14226 info_ptr += bytes_read;
14230 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14231 dwarf_form_name (form),
14232 bfd_get_filename (abfd));
14236 if (cu->per_cu->is_dwz && is_ref_attr (attr))
14237 attr->form = DW_FORM_GNU_ref_alt;
14239 /* We have seen instances where the compiler tried to emit a byte
14240 size attribute of -1 which ended up being encoded as an unsigned
14241 0xffffffff. Although 0xffffffff is technically a valid size value,
14242 an object of this size seems pretty unlikely so we can relatively
14243 safely treat these cases as if the size attribute was invalid and
14244 treat them as zero by default. */
14245 if (attr->name == DW_AT_byte_size
14246 && form == DW_FORM_data4
14247 && DW_UNSND (attr) >= 0xffffffff)
14250 (&symfile_complaints,
14251 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14252 hex_string (DW_UNSND (attr)));
14253 DW_UNSND (attr) = 0;
14259 /* Read an attribute described by an abbreviated attribute. */
14262 read_attribute (const struct die_reader_specs *reader,
14263 struct attribute *attr, struct attr_abbrev *abbrev,
14264 gdb_byte *info_ptr)
14266 attr->name = abbrev->name;
14267 return read_attribute_value (reader, attr, abbrev->form, info_ptr);
14270 /* Read dwarf information from a buffer. */
14272 static unsigned int
14273 read_1_byte (bfd *abfd, const gdb_byte *buf)
14275 return bfd_get_8 (abfd, buf);
14279 read_1_signed_byte (bfd *abfd, const gdb_byte *buf)
14281 return bfd_get_signed_8 (abfd, buf);
14284 static unsigned int
14285 read_2_bytes (bfd *abfd, const gdb_byte *buf)
14287 return bfd_get_16 (abfd, buf);
14291 read_2_signed_bytes (bfd *abfd, const gdb_byte *buf)
14293 return bfd_get_signed_16 (abfd, buf);
14296 static unsigned int
14297 read_4_bytes (bfd *abfd, const gdb_byte *buf)
14299 return bfd_get_32 (abfd, buf);
14303 read_4_signed_bytes (bfd *abfd, const gdb_byte *buf)
14305 return bfd_get_signed_32 (abfd, buf);
14309 read_8_bytes (bfd *abfd, const gdb_byte *buf)
14311 return bfd_get_64 (abfd, buf);
14315 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
14316 unsigned int *bytes_read)
14318 struct comp_unit_head *cu_header = &cu->header;
14319 CORE_ADDR retval = 0;
14321 if (cu_header->signed_addr_p)
14323 switch (cu_header->addr_size)
14326 retval = bfd_get_signed_16 (abfd, buf);
14329 retval = bfd_get_signed_32 (abfd, buf);
14332 retval = bfd_get_signed_64 (abfd, buf);
14335 internal_error (__FILE__, __LINE__,
14336 _("read_address: bad switch, signed [in module %s]"),
14337 bfd_get_filename (abfd));
14342 switch (cu_header->addr_size)
14345 retval = bfd_get_16 (abfd, buf);
14348 retval = bfd_get_32 (abfd, buf);
14351 retval = bfd_get_64 (abfd, buf);
14354 internal_error (__FILE__, __LINE__,
14355 _("read_address: bad switch, "
14356 "unsigned [in module %s]"),
14357 bfd_get_filename (abfd));
14361 *bytes_read = cu_header->addr_size;
14365 /* Read the initial length from a section. The (draft) DWARF 3
14366 specification allows the initial length to take up either 4 bytes
14367 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14368 bytes describe the length and all offsets will be 8 bytes in length
14371 An older, non-standard 64-bit format is also handled by this
14372 function. The older format in question stores the initial length
14373 as an 8-byte quantity without an escape value. Lengths greater
14374 than 2^32 aren't very common which means that the initial 4 bytes
14375 is almost always zero. Since a length value of zero doesn't make
14376 sense for the 32-bit format, this initial zero can be considered to
14377 be an escape value which indicates the presence of the older 64-bit
14378 format. As written, the code can't detect (old format) lengths
14379 greater than 4GB. If it becomes necessary to handle lengths
14380 somewhat larger than 4GB, we could allow other small values (such
14381 as the non-sensical values of 1, 2, and 3) to also be used as
14382 escape values indicating the presence of the old format.
14384 The value returned via bytes_read should be used to increment the
14385 relevant pointer after calling read_initial_length().
14387 [ Note: read_initial_length() and read_offset() are based on the
14388 document entitled "DWARF Debugging Information Format", revision
14389 3, draft 8, dated November 19, 2001. This document was obtained
14392 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14394 This document is only a draft and is subject to change. (So beware.)
14396 Details regarding the older, non-standard 64-bit format were
14397 determined empirically by examining 64-bit ELF files produced by
14398 the SGI toolchain on an IRIX 6.5 machine.
14400 - Kevin, July 16, 2002
14404 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
14406 LONGEST length = bfd_get_32 (abfd, buf);
14408 if (length == 0xffffffff)
14410 length = bfd_get_64 (abfd, buf + 4);
14413 else if (length == 0)
14415 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14416 length = bfd_get_64 (abfd, buf);
14427 /* Cover function for read_initial_length.
14428 Returns the length of the object at BUF, and stores the size of the
14429 initial length in *BYTES_READ and stores the size that offsets will be in
14431 If the initial length size is not equivalent to that specified in
14432 CU_HEADER then issue a complaint.
14433 This is useful when reading non-comp-unit headers. */
14436 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
14437 const struct comp_unit_head *cu_header,
14438 unsigned int *bytes_read,
14439 unsigned int *offset_size)
14441 LONGEST length = read_initial_length (abfd, buf, bytes_read);
14443 gdb_assert (cu_header->initial_length_size == 4
14444 || cu_header->initial_length_size == 8
14445 || cu_header->initial_length_size == 12);
14447 if (cu_header->initial_length_size != *bytes_read)
14448 complaint (&symfile_complaints,
14449 _("intermixed 32-bit and 64-bit DWARF sections"));
14451 *offset_size = (*bytes_read == 4) ? 4 : 8;
14455 /* Read an offset from the data stream. The size of the offset is
14456 given by cu_header->offset_size. */
14459 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
14460 unsigned int *bytes_read)
14462 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
14464 *bytes_read = cu_header->offset_size;
14468 /* Read an offset from the data stream. */
14471 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
14473 LONGEST retval = 0;
14475 switch (offset_size)
14478 retval = bfd_get_32 (abfd, buf);
14481 retval = bfd_get_64 (abfd, buf);
14484 internal_error (__FILE__, __LINE__,
14485 _("read_offset_1: bad switch [in module %s]"),
14486 bfd_get_filename (abfd));
14493 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
14495 /* If the size of a host char is 8 bits, we can return a pointer
14496 to the buffer, otherwise we have to copy the data to a buffer
14497 allocated on the temporary obstack. */
14498 gdb_assert (HOST_CHAR_BIT == 8);
14503 read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
14505 /* If the size of a host char is 8 bits, we can return a pointer
14506 to the string, otherwise we have to copy the string to a buffer
14507 allocated on the temporary obstack. */
14508 gdb_assert (HOST_CHAR_BIT == 8);
14511 *bytes_read_ptr = 1;
14514 *bytes_read_ptr = strlen ((char *) buf) + 1;
14515 return (char *) buf;
14519 read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset)
14521 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
14522 if (dwarf2_per_objfile->str.buffer == NULL)
14523 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14524 bfd_get_filename (abfd));
14525 if (str_offset >= dwarf2_per_objfile->str.size)
14526 error (_("DW_FORM_strp pointing outside of "
14527 ".debug_str section [in module %s]"),
14528 bfd_get_filename (abfd));
14529 gdb_assert (HOST_CHAR_BIT == 8);
14530 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
14532 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
14535 /* Read a string at offset STR_OFFSET in the .debug_str section from
14536 the .dwz file DWZ. Throw an error if the offset is too large. If
14537 the string consists of a single NUL byte, return NULL; otherwise
14538 return a pointer to the string. */
14541 read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset)
14543 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str);
14545 if (dwz->str.buffer == NULL)
14546 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14547 "section [in module %s]"),
14548 bfd_get_filename (dwz->dwz_bfd));
14549 if (str_offset >= dwz->str.size)
14550 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14551 ".debug_str section [in module %s]"),
14552 bfd_get_filename (dwz->dwz_bfd));
14553 gdb_assert (HOST_CHAR_BIT == 8);
14554 if (dwz->str.buffer[str_offset] == '\0')
14556 return (char *) (dwz->str.buffer + str_offset);
14560 read_indirect_string (bfd *abfd, gdb_byte *buf,
14561 const struct comp_unit_head *cu_header,
14562 unsigned int *bytes_read_ptr)
14564 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
14566 return read_indirect_string_at_offset (abfd, str_offset);
14570 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
14573 unsigned int num_read;
14575 unsigned char byte;
14583 byte = bfd_get_8 (abfd, buf);
14586 result |= ((ULONGEST) (byte & 127) << shift);
14587 if ((byte & 128) == 0)
14593 *bytes_read_ptr = num_read;
14598 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
14601 int i, shift, num_read;
14602 unsigned char byte;
14610 byte = bfd_get_8 (abfd, buf);
14613 result |= ((LONGEST) (byte & 127) << shift);
14615 if ((byte & 128) == 0)
14620 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
14621 result |= -(((LONGEST) 1) << shift);
14622 *bytes_read_ptr = num_read;
14626 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14627 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14628 ADDR_SIZE is the size of addresses from the CU header. */
14631 read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size)
14633 struct objfile *objfile = dwarf2_per_objfile->objfile;
14634 bfd *abfd = objfile->obfd;
14635 const gdb_byte *info_ptr;
14637 dwarf2_read_section (objfile, &dwarf2_per_objfile->addr);
14638 if (dwarf2_per_objfile->addr.buffer == NULL)
14639 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14641 if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size)
14642 error (_("DW_FORM_addr_index pointing outside of "
14643 ".debug_addr section [in module %s]"),
14645 info_ptr = (dwarf2_per_objfile->addr.buffer
14646 + addr_base + addr_index * addr_size);
14647 if (addr_size == 4)
14648 return bfd_get_32 (abfd, info_ptr);
14650 return bfd_get_64 (abfd, info_ptr);
14653 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14656 read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index)
14658 return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size);
14661 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14664 read_addr_index_from_leb128 (struct dwarf2_cu *cu, gdb_byte *info_ptr,
14665 unsigned int *bytes_read)
14667 bfd *abfd = cu->objfile->obfd;
14668 unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
14670 return read_addr_index (cu, addr_index);
14673 /* Data structure to pass results from dwarf2_read_addr_index_reader
14674 back to dwarf2_read_addr_index. */
14676 struct dwarf2_read_addr_index_data
14678 ULONGEST addr_base;
14682 /* die_reader_func for dwarf2_read_addr_index. */
14685 dwarf2_read_addr_index_reader (const struct die_reader_specs *reader,
14686 gdb_byte *info_ptr,
14687 struct die_info *comp_unit_die,
14691 struct dwarf2_cu *cu = reader->cu;
14692 struct dwarf2_read_addr_index_data *aidata =
14693 (struct dwarf2_read_addr_index_data *) data;
14695 aidata->addr_base = cu->addr_base;
14696 aidata->addr_size = cu->header.addr_size;
14699 /* Given an index in .debug_addr, fetch the value.
14700 NOTE: This can be called during dwarf expression evaluation,
14701 long after the debug information has been read, and thus per_cu->cu
14702 may no longer exist. */
14705 dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
14706 unsigned int addr_index)
14708 struct objfile *objfile = per_cu->objfile;
14709 struct dwarf2_cu *cu = per_cu->cu;
14710 ULONGEST addr_base;
14713 /* This is intended to be called from outside this file. */
14714 dw2_setup (objfile);
14716 /* We need addr_base and addr_size.
14717 If we don't have PER_CU->cu, we have to get it.
14718 Nasty, but the alternative is storing the needed info in PER_CU,
14719 which at this point doesn't seem justified: it's not clear how frequently
14720 it would get used and it would increase the size of every PER_CU.
14721 Entry points like dwarf2_per_cu_addr_size do a similar thing
14722 so we're not in uncharted territory here.
14723 Alas we need to be a bit more complicated as addr_base is contained
14726 We don't need to read the entire CU(/TU).
14727 We just need the header and top level die.
14729 IWBN to use the aging mechanism to let us lazily later discard the CU.
14730 For now we skip this optimization. */
14734 addr_base = cu->addr_base;
14735 addr_size = cu->header.addr_size;
14739 struct dwarf2_read_addr_index_data aidata;
14741 /* Note: We can't use init_cutu_and_read_dies_simple here,
14742 we need addr_base. */
14743 init_cutu_and_read_dies (per_cu, NULL, 0, 0,
14744 dwarf2_read_addr_index_reader, &aidata);
14745 addr_base = aidata.addr_base;
14746 addr_size = aidata.addr_size;
14749 return read_addr_index_1 (addr_index, addr_base, addr_size);
14752 /* Given a DW_AT_str_index, fetch the string. */
14755 read_str_index (const struct die_reader_specs *reader,
14756 struct dwarf2_cu *cu, ULONGEST str_index)
14758 struct objfile *objfile = dwarf2_per_objfile->objfile;
14759 const char *dwo_name = objfile->name;
14760 bfd *abfd = objfile->obfd;
14761 struct dwo_sections *sections = &reader->dwo_file->sections;
14762 gdb_byte *info_ptr;
14763 ULONGEST str_offset;
14765 dwarf2_read_section (objfile, §ions->str);
14766 dwarf2_read_section (objfile, §ions->str_offsets);
14767 if (sections->str.buffer == NULL)
14768 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14769 " in CU at offset 0x%lx [in module %s]"),
14770 (long) cu->header.offset.sect_off, dwo_name);
14771 if (sections->str_offsets.buffer == NULL)
14772 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14773 " in CU at offset 0x%lx [in module %s]"),
14774 (long) cu->header.offset.sect_off, dwo_name);
14775 if (str_index * cu->header.offset_size >= sections->str_offsets.size)
14776 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14777 " section in CU at offset 0x%lx [in module %s]"),
14778 (long) cu->header.offset.sect_off, dwo_name);
14779 info_ptr = (sections->str_offsets.buffer
14780 + str_index * cu->header.offset_size);
14781 if (cu->header.offset_size == 4)
14782 str_offset = bfd_get_32 (abfd, info_ptr);
14784 str_offset = bfd_get_64 (abfd, info_ptr);
14785 if (str_offset >= sections->str.size)
14786 error (_("Offset from DW_FORM_str_index pointing outside of"
14787 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14788 (long) cu->header.offset.sect_off, dwo_name);
14789 return (char *) (sections->str.buffer + str_offset);
14792 /* Return the length of an LEB128 number in BUF. */
14795 leb128_size (const gdb_byte *buf)
14797 const gdb_byte *begin = buf;
14803 if ((byte & 128) == 0)
14804 return buf - begin;
14809 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
14816 cu->language = language_c;
14818 case DW_LANG_C_plus_plus:
14819 cu->language = language_cplus;
14822 cu->language = language_d;
14824 case DW_LANG_Fortran77:
14825 case DW_LANG_Fortran90:
14826 case DW_LANG_Fortran95:
14827 cu->language = language_fortran;
14830 cu->language = language_go;
14832 case DW_LANG_Mips_Assembler:
14833 cu->language = language_asm;
14836 cu->language = language_java;
14838 case DW_LANG_Ada83:
14839 case DW_LANG_Ada95:
14840 cu->language = language_ada;
14842 case DW_LANG_Modula2:
14843 cu->language = language_m2;
14845 case DW_LANG_Pascal83:
14846 cu->language = language_pascal;
14849 cu->language = language_objc;
14851 case DW_LANG_Cobol74:
14852 case DW_LANG_Cobol85:
14854 cu->language = language_minimal;
14857 cu->language_defn = language_def (cu->language);
14860 /* Return the named attribute or NULL if not there. */
14862 static struct attribute *
14863 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
14868 struct attribute *spec = NULL;
14870 for (i = 0; i < die->num_attrs; ++i)
14872 if (die->attrs[i].name == name)
14873 return &die->attrs[i];
14874 if (die->attrs[i].name == DW_AT_specification
14875 || die->attrs[i].name == DW_AT_abstract_origin)
14876 spec = &die->attrs[i];
14882 die = follow_die_ref (die, spec, &cu);
14888 /* Return the named attribute or NULL if not there,
14889 but do not follow DW_AT_specification, etc.
14890 This is for use in contexts where we're reading .debug_types dies.
14891 Following DW_AT_specification, DW_AT_abstract_origin will take us
14892 back up the chain, and we want to go down. */
14894 static struct attribute *
14895 dwarf2_attr_no_follow (struct die_info *die, unsigned int name)
14899 for (i = 0; i < die->num_attrs; ++i)
14900 if (die->attrs[i].name == name)
14901 return &die->attrs[i];
14906 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14907 and holds a non-zero value. This function should only be used for
14908 DW_FORM_flag or DW_FORM_flag_present attributes. */
14911 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
14913 struct attribute *attr = dwarf2_attr (die, name, cu);
14915 return (attr && DW_UNSND (attr));
14919 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
14921 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14922 which value is non-zero. However, we have to be careful with
14923 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14924 (via dwarf2_flag_true_p) follows this attribute. So we may
14925 end up accidently finding a declaration attribute that belongs
14926 to a different DIE referenced by the specification attribute,
14927 even though the given DIE does not have a declaration attribute. */
14928 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
14929 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
14932 /* Return the die giving the specification for DIE, if there is
14933 one. *SPEC_CU is the CU containing DIE on input, and the CU
14934 containing the return value on output. If there is no
14935 specification, but there is an abstract origin, that is
14938 static struct die_info *
14939 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
14941 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
14944 if (spec_attr == NULL)
14945 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
14947 if (spec_attr == NULL)
14950 return follow_die_ref (die, spec_attr, spec_cu);
14953 /* Free the line_header structure *LH, and any arrays and strings it
14955 NOTE: This is also used as a "cleanup" function. */
14958 free_line_header (struct line_header *lh)
14960 if (lh->standard_opcode_lengths)
14961 xfree (lh->standard_opcode_lengths);
14963 /* Remember that all the lh->file_names[i].name pointers are
14964 pointers into debug_line_buffer, and don't need to be freed. */
14965 if (lh->file_names)
14966 xfree (lh->file_names);
14968 /* Similarly for the include directory names. */
14969 if (lh->include_dirs)
14970 xfree (lh->include_dirs);
14975 /* Add an entry to LH's include directory table. */
14978 add_include_dir (struct line_header *lh, char *include_dir)
14980 /* Grow the array if necessary. */
14981 if (lh->include_dirs_size == 0)
14983 lh->include_dirs_size = 1; /* for testing */
14984 lh->include_dirs = xmalloc (lh->include_dirs_size
14985 * sizeof (*lh->include_dirs));
14987 else if (lh->num_include_dirs >= lh->include_dirs_size)
14989 lh->include_dirs_size *= 2;
14990 lh->include_dirs = xrealloc (lh->include_dirs,
14991 (lh->include_dirs_size
14992 * sizeof (*lh->include_dirs)));
14995 lh->include_dirs[lh->num_include_dirs++] = include_dir;
14998 /* Add an entry to LH's file name table. */
15001 add_file_name (struct line_header *lh,
15003 unsigned int dir_index,
15004 unsigned int mod_time,
15005 unsigned int length)
15007 struct file_entry *fe;
15009 /* Grow the array if necessary. */
15010 if (lh->file_names_size == 0)
15012 lh->file_names_size = 1; /* for testing */
15013 lh->file_names = xmalloc (lh->file_names_size
15014 * sizeof (*lh->file_names));
15016 else if (lh->num_file_names >= lh->file_names_size)
15018 lh->file_names_size *= 2;
15019 lh->file_names = xrealloc (lh->file_names,
15020 (lh->file_names_size
15021 * sizeof (*lh->file_names)));
15024 fe = &lh->file_names[lh->num_file_names++];
15026 fe->dir_index = dir_index;
15027 fe->mod_time = mod_time;
15028 fe->length = length;
15029 fe->included_p = 0;
15033 /* A convenience function to find the proper .debug_line section for a
15036 static struct dwarf2_section_info *
15037 get_debug_line_section (struct dwarf2_cu *cu)
15039 struct dwarf2_section_info *section;
15041 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
15043 if (cu->dwo_unit && cu->per_cu->is_debug_types)
15044 section = &cu->dwo_unit->dwo_file->sections.line;
15045 else if (cu->per_cu->is_dwz)
15047 struct dwz_file *dwz = dwarf2_get_dwz_file ();
15049 section = &dwz->line;
15052 section = &dwarf2_per_objfile->line;
15057 /* Read the statement program header starting at OFFSET in
15058 .debug_line, or .debug_line.dwo. Return a pointer
15059 to a struct line_header, allocated using xmalloc.
15061 NOTE: the strings in the include directory and file name tables of
15062 the returned object point into the dwarf line section buffer,
15063 and must not be freed. */
15065 static struct line_header *
15066 dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu)
15068 struct cleanup *back_to;
15069 struct line_header *lh;
15070 gdb_byte *line_ptr;
15071 unsigned int bytes_read, offset_size;
15073 char *cur_dir, *cur_file;
15074 struct dwarf2_section_info *section;
15077 section = get_debug_line_section (cu);
15078 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
15079 if (section->buffer == NULL)
15081 if (cu->dwo_unit && cu->per_cu->is_debug_types)
15082 complaint (&symfile_complaints, _("missing .debug_line.dwo section"));
15084 complaint (&symfile_complaints, _("missing .debug_line section"));
15088 /* We can't do this until we know the section is non-empty.
15089 Only then do we know we have such a section. */
15090 abfd = section->asection->owner;
15092 /* Make sure that at least there's room for the total_length field.
15093 That could be 12 bytes long, but we're just going to fudge that. */
15094 if (offset + 4 >= section->size)
15096 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15100 lh = xmalloc (sizeof (*lh));
15101 memset (lh, 0, sizeof (*lh));
15102 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
15105 line_ptr = section->buffer + offset;
15107 /* Read in the header. */
15109 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
15110 &bytes_read, &offset_size);
15111 line_ptr += bytes_read;
15112 if (line_ptr + lh->total_length > (section->buffer + section->size))
15114 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15117 lh->statement_program_end = line_ptr + lh->total_length;
15118 lh->version = read_2_bytes (abfd, line_ptr);
15120 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
15121 line_ptr += offset_size;
15122 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
15124 if (lh->version >= 4)
15126 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
15130 lh->maximum_ops_per_instruction = 1;
15132 if (lh->maximum_ops_per_instruction == 0)
15134 lh->maximum_ops_per_instruction = 1;
15135 complaint (&symfile_complaints,
15136 _("invalid maximum_ops_per_instruction "
15137 "in `.debug_line' section"));
15140 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
15142 lh->line_base = read_1_signed_byte (abfd, line_ptr);
15144 lh->line_range = read_1_byte (abfd, line_ptr);
15146 lh->opcode_base = read_1_byte (abfd, line_ptr);
15148 lh->standard_opcode_lengths
15149 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
15151 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
15152 for (i = 1; i < lh->opcode_base; ++i)
15154 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
15158 /* Read directory table. */
15159 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
15161 line_ptr += bytes_read;
15162 add_include_dir (lh, cur_dir);
15164 line_ptr += bytes_read;
15166 /* Read file name table. */
15167 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
15169 unsigned int dir_index, mod_time, length;
15171 line_ptr += bytes_read;
15172 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15173 line_ptr += bytes_read;
15174 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15175 line_ptr += bytes_read;
15176 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15177 line_ptr += bytes_read;
15179 add_file_name (lh, cur_file, dir_index, mod_time, length);
15181 line_ptr += bytes_read;
15182 lh->statement_program_start = line_ptr;
15184 if (line_ptr > (section->buffer + section->size))
15185 complaint (&symfile_complaints,
15186 _("line number info header doesn't "
15187 "fit in `.debug_line' section"));
15189 discard_cleanups (back_to);
15193 /* Subroutine of dwarf_decode_lines to simplify it.
15194 Return the file name of the psymtab for included file FILE_INDEX
15195 in line header LH of PST.
15196 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15197 If space for the result is malloc'd, it will be freed by a cleanup.
15198 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
15200 The function creates dangling cleanup registration. */
15203 psymtab_include_file_name (const struct line_header *lh, int file_index,
15204 const struct partial_symtab *pst,
15205 const char *comp_dir)
15207 const struct file_entry fe = lh->file_names [file_index];
15208 char *include_name = fe.name;
15209 char *include_name_to_compare = include_name;
15210 char *dir_name = NULL;
15211 const char *pst_filename;
15212 char *copied_name = NULL;
15216 dir_name = lh->include_dirs[fe.dir_index - 1];
15218 if (!IS_ABSOLUTE_PATH (include_name)
15219 && (dir_name != NULL || comp_dir != NULL))
15221 /* Avoid creating a duplicate psymtab for PST.
15222 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15223 Before we do the comparison, however, we need to account
15224 for DIR_NAME and COMP_DIR.
15225 First prepend dir_name (if non-NULL). If we still don't
15226 have an absolute path prepend comp_dir (if non-NULL).
15227 However, the directory we record in the include-file's
15228 psymtab does not contain COMP_DIR (to match the
15229 corresponding symtab(s)).
15234 bash$ gcc -g ./hello.c
15235 include_name = "hello.c"
15237 DW_AT_comp_dir = comp_dir = "/tmp"
15238 DW_AT_name = "./hello.c" */
15240 if (dir_name != NULL)
15242 include_name = concat (dir_name, SLASH_STRING,
15243 include_name, (char *)NULL);
15244 include_name_to_compare = include_name;
15245 make_cleanup (xfree, include_name);
15247 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
15249 include_name_to_compare = concat (comp_dir, SLASH_STRING,
15250 include_name, (char *)NULL);
15254 pst_filename = pst->filename;
15255 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
15257 copied_name = concat (pst->dirname, SLASH_STRING,
15258 pst_filename, (char *)NULL);
15259 pst_filename = copied_name;
15262 file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
15264 if (include_name_to_compare != include_name)
15265 xfree (include_name_to_compare);
15266 if (copied_name != NULL)
15267 xfree (copied_name);
15271 return include_name;
15274 /* Ignore this record_line request. */
15277 noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc)
15282 /* Subroutine of dwarf_decode_lines to simplify it.
15283 Process the line number information in LH. */
15286 dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir,
15287 struct dwarf2_cu *cu, struct partial_symtab *pst)
15289 gdb_byte *line_ptr, *extended_end;
15290 gdb_byte *line_end;
15291 unsigned int bytes_read, extended_len;
15292 unsigned char op_code, extended_op, adj_opcode;
15293 CORE_ADDR baseaddr;
15294 struct objfile *objfile = cu->objfile;
15295 bfd *abfd = objfile->obfd;
15296 struct gdbarch *gdbarch = get_objfile_arch (objfile);
15297 const int decode_for_pst_p = (pst != NULL);
15298 struct subfile *last_subfile = NULL;
15299 void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc)
15302 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
15304 line_ptr = lh->statement_program_start;
15305 line_end = lh->statement_program_end;
15307 /* Read the statement sequences until there's nothing left. */
15308 while (line_ptr < line_end)
15310 /* state machine registers */
15311 CORE_ADDR address = 0;
15312 unsigned int file = 1;
15313 unsigned int line = 1;
15314 unsigned int column = 0;
15315 int is_stmt = lh->default_is_stmt;
15316 int basic_block = 0;
15317 int end_sequence = 0;
15319 unsigned char op_index = 0;
15321 if (!decode_for_pst_p && lh->num_file_names >= file)
15323 /* Start a subfile for the current file of the state machine. */
15324 /* lh->include_dirs and lh->file_names are 0-based, but the
15325 directory and file name numbers in the statement program
15327 struct file_entry *fe = &lh->file_names[file - 1];
15331 dir = lh->include_dirs[fe->dir_index - 1];
15333 dwarf2_start_subfile (fe->name, dir, comp_dir);
15336 /* Decode the table. */
15337 while (!end_sequence)
15339 op_code = read_1_byte (abfd, line_ptr);
15341 if (line_ptr > line_end)
15343 dwarf2_debug_line_missing_end_sequence_complaint ();
15347 if (op_code >= lh->opcode_base)
15349 /* Special operand. */
15350 adj_opcode = op_code - lh->opcode_base;
15351 address += (((op_index + (adj_opcode / lh->line_range))
15352 / lh->maximum_ops_per_instruction)
15353 * lh->minimum_instruction_length);
15354 op_index = ((op_index + (adj_opcode / lh->line_range))
15355 % lh->maximum_ops_per_instruction);
15356 line += lh->line_base + (adj_opcode % lh->line_range);
15357 if (lh->num_file_names < file || file == 0)
15358 dwarf2_debug_line_missing_file_complaint ();
15359 /* For now we ignore lines not starting on an
15360 instruction boundary. */
15361 else if (op_index == 0)
15363 lh->file_names[file - 1].included_p = 1;
15364 if (!decode_for_pst_p && is_stmt)
15366 if (last_subfile != current_subfile)
15368 addr = gdbarch_addr_bits_remove (gdbarch, address);
15370 (*p_record_line) (last_subfile, 0, addr);
15371 last_subfile = current_subfile;
15373 /* Append row to matrix using current values. */
15374 addr = gdbarch_addr_bits_remove (gdbarch, address);
15375 (*p_record_line) (current_subfile, line, addr);
15380 else switch (op_code)
15382 case DW_LNS_extended_op:
15383 extended_len = read_unsigned_leb128 (abfd, line_ptr,
15385 line_ptr += bytes_read;
15386 extended_end = line_ptr + extended_len;
15387 extended_op = read_1_byte (abfd, line_ptr);
15389 switch (extended_op)
15391 case DW_LNE_end_sequence:
15392 p_record_line = record_line;
15395 case DW_LNE_set_address:
15396 address = read_address (abfd, line_ptr, cu, &bytes_read);
15398 if (address == 0 && !dwarf2_per_objfile->has_section_at_zero)
15400 /* This line table is for a function which has been
15401 GCd by the linker. Ignore it. PR gdb/12528 */
15404 = line_ptr - get_debug_line_section (cu)->buffer;
15406 complaint (&symfile_complaints,
15407 _(".debug_line address at offset 0x%lx is 0 "
15409 line_offset, objfile->name);
15410 p_record_line = noop_record_line;
15414 line_ptr += bytes_read;
15415 address += baseaddr;
15417 case DW_LNE_define_file:
15420 unsigned int dir_index, mod_time, length;
15422 cur_file = read_direct_string (abfd, line_ptr,
15424 line_ptr += bytes_read;
15426 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15427 line_ptr += bytes_read;
15429 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15430 line_ptr += bytes_read;
15432 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15433 line_ptr += bytes_read;
15434 add_file_name (lh, cur_file, dir_index, mod_time, length);
15437 case DW_LNE_set_discriminator:
15438 /* The discriminator is not interesting to the debugger;
15440 line_ptr = extended_end;
15443 complaint (&symfile_complaints,
15444 _("mangled .debug_line section"));
15447 /* Make sure that we parsed the extended op correctly. If e.g.
15448 we expected a different address size than the producer used,
15449 we may have read the wrong number of bytes. */
15450 if (line_ptr != extended_end)
15452 complaint (&symfile_complaints,
15453 _("mangled .debug_line section"));
15458 if (lh->num_file_names < file || file == 0)
15459 dwarf2_debug_line_missing_file_complaint ();
15462 lh->file_names[file - 1].included_p = 1;
15463 if (!decode_for_pst_p && is_stmt)
15465 if (last_subfile != current_subfile)
15467 addr = gdbarch_addr_bits_remove (gdbarch, address);
15469 (*p_record_line) (last_subfile, 0, addr);
15470 last_subfile = current_subfile;
15472 addr = gdbarch_addr_bits_remove (gdbarch, address);
15473 (*p_record_line) (current_subfile, line, addr);
15478 case DW_LNS_advance_pc:
15481 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15483 address += (((op_index + adjust)
15484 / lh->maximum_ops_per_instruction)
15485 * lh->minimum_instruction_length);
15486 op_index = ((op_index + adjust)
15487 % lh->maximum_ops_per_instruction);
15488 line_ptr += bytes_read;
15491 case DW_LNS_advance_line:
15492 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
15493 line_ptr += bytes_read;
15495 case DW_LNS_set_file:
15497 /* The arrays lh->include_dirs and lh->file_names are
15498 0-based, but the directory and file name numbers in
15499 the statement program are 1-based. */
15500 struct file_entry *fe;
15503 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15504 line_ptr += bytes_read;
15505 if (lh->num_file_names < file || file == 0)
15506 dwarf2_debug_line_missing_file_complaint ();
15509 fe = &lh->file_names[file - 1];
15511 dir = lh->include_dirs[fe->dir_index - 1];
15512 if (!decode_for_pst_p)
15514 last_subfile = current_subfile;
15515 dwarf2_start_subfile (fe->name, dir, comp_dir);
15520 case DW_LNS_set_column:
15521 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15522 line_ptr += bytes_read;
15524 case DW_LNS_negate_stmt:
15525 is_stmt = (!is_stmt);
15527 case DW_LNS_set_basic_block:
15530 /* Add to the address register of the state machine the
15531 address increment value corresponding to special opcode
15532 255. I.e., this value is scaled by the minimum
15533 instruction length since special opcode 255 would have
15534 scaled the increment. */
15535 case DW_LNS_const_add_pc:
15537 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
15539 address += (((op_index + adjust)
15540 / lh->maximum_ops_per_instruction)
15541 * lh->minimum_instruction_length);
15542 op_index = ((op_index + adjust)
15543 % lh->maximum_ops_per_instruction);
15546 case DW_LNS_fixed_advance_pc:
15547 address += read_2_bytes (abfd, line_ptr);
15553 /* Unknown standard opcode, ignore it. */
15556 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
15558 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15559 line_ptr += bytes_read;
15564 if (lh->num_file_names < file || file == 0)
15565 dwarf2_debug_line_missing_file_complaint ();
15568 lh->file_names[file - 1].included_p = 1;
15569 if (!decode_for_pst_p)
15571 addr = gdbarch_addr_bits_remove (gdbarch, address);
15572 (*p_record_line) (current_subfile, 0, addr);
15578 /* Decode the Line Number Program (LNP) for the given line_header
15579 structure and CU. The actual information extracted and the type
15580 of structures created from the LNP depends on the value of PST.
15582 1. If PST is NULL, then this procedure uses the data from the program
15583 to create all necessary symbol tables, and their linetables.
15585 2. If PST is not NULL, this procedure reads the program to determine
15586 the list of files included by the unit represented by PST, and
15587 builds all the associated partial symbol tables.
15589 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15590 It is used for relative paths in the line table.
15591 NOTE: When processing partial symtabs (pst != NULL),
15592 comp_dir == pst->dirname.
15594 NOTE: It is important that psymtabs have the same file name (via strcmp)
15595 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15596 symtab we don't use it in the name of the psymtabs we create.
15597 E.g. expand_line_sal requires this when finding psymtabs to expand.
15598 A good testcase for this is mb-inline.exp. */
15601 dwarf_decode_lines (struct line_header *lh, const char *comp_dir,
15602 struct dwarf2_cu *cu, struct partial_symtab *pst,
15603 int want_line_info)
15605 struct objfile *objfile = cu->objfile;
15606 const int decode_for_pst_p = (pst != NULL);
15607 struct subfile *first_subfile = current_subfile;
15609 if (want_line_info)
15610 dwarf_decode_lines_1 (lh, comp_dir, cu, pst);
15612 if (decode_for_pst_p)
15616 /* Now that we're done scanning the Line Header Program, we can
15617 create the psymtab of each included file. */
15618 for (file_index = 0; file_index < lh->num_file_names; file_index++)
15619 if (lh->file_names[file_index].included_p == 1)
15621 char *include_name =
15622 psymtab_include_file_name (lh, file_index, pst, comp_dir);
15623 if (include_name != NULL)
15624 dwarf2_create_include_psymtab (include_name, pst, objfile);
15629 /* Make sure a symtab is created for every file, even files
15630 which contain only variables (i.e. no code with associated
15634 for (i = 0; i < lh->num_file_names; i++)
15637 struct file_entry *fe;
15639 fe = &lh->file_names[i];
15641 dir = lh->include_dirs[fe->dir_index - 1];
15642 dwarf2_start_subfile (fe->name, dir, comp_dir);
15644 /* Skip the main file; we don't need it, and it must be
15645 allocated last, so that it will show up before the
15646 non-primary symtabs in the objfile's symtab list. */
15647 if (current_subfile == first_subfile)
15650 if (current_subfile->symtab == NULL)
15651 current_subfile->symtab = allocate_symtab (current_subfile->name,
15653 fe->symtab = current_subfile->symtab;
15658 /* Start a subfile for DWARF. FILENAME is the name of the file and
15659 DIRNAME the name of the source directory which contains FILENAME
15660 or NULL if not known. COMP_DIR is the compilation directory for the
15661 linetable's compilation unit or NULL if not known.
15662 This routine tries to keep line numbers from identical absolute and
15663 relative file names in a common subfile.
15665 Using the `list' example from the GDB testsuite, which resides in
15666 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15667 of /srcdir/list0.c yields the following debugging information for list0.c:
15669 DW_AT_name: /srcdir/list0.c
15670 DW_AT_comp_dir: /compdir
15671 files.files[0].name: list0.h
15672 files.files[0].dir: /srcdir
15673 files.files[1].name: list0.c
15674 files.files[1].dir: /srcdir
15676 The line number information for list0.c has to end up in a single
15677 subfile, so that `break /srcdir/list0.c:1' works as expected.
15678 start_subfile will ensure that this happens provided that we pass the
15679 concatenation of files.files[1].dir and files.files[1].name as the
15683 dwarf2_start_subfile (char *filename, const char *dirname,
15684 const char *comp_dir)
15688 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15689 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15690 second argument to start_subfile. To be consistent, we do the
15691 same here. In order not to lose the line information directory,
15692 we concatenate it to the filename when it makes sense.
15693 Note that the Dwarf3 standard says (speaking of filenames in line
15694 information): ``The directory index is ignored for file names
15695 that represent full path names''. Thus ignoring dirname in the
15696 `else' branch below isn't an issue. */
15698 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
15699 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
15701 fullname = filename;
15703 start_subfile (fullname, comp_dir);
15705 if (fullname != filename)
15709 /* Start a symtab for DWARF.
15710 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15713 dwarf2_start_symtab (struct dwarf2_cu *cu,
15714 const char *name, const char *comp_dir, CORE_ADDR low_pc)
15716 start_symtab (name, comp_dir, low_pc);
15717 record_debugformat ("DWARF 2");
15718 record_producer (cu->producer);
15720 /* We assume that we're processing GCC output. */
15721 processing_gcc_compilation = 2;
15723 cu->processing_has_namespace_info = 0;
15727 var_decode_location (struct attribute *attr, struct symbol *sym,
15728 struct dwarf2_cu *cu)
15730 struct objfile *objfile = cu->objfile;
15731 struct comp_unit_head *cu_header = &cu->header;
15733 /* NOTE drow/2003-01-30: There used to be a comment and some special
15734 code here to turn a symbol with DW_AT_external and a
15735 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15736 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15737 with some versions of binutils) where shared libraries could have
15738 relocations against symbols in their debug information - the
15739 minimal symbol would have the right address, but the debug info
15740 would not. It's no longer necessary, because we will explicitly
15741 apply relocations when we read in the debug information now. */
15743 /* A DW_AT_location attribute with no contents indicates that a
15744 variable has been optimized away. */
15745 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
15747 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
15751 /* Handle one degenerate form of location expression specially, to
15752 preserve GDB's previous behavior when section offsets are
15753 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15754 then mark this symbol as LOC_STATIC. */
15756 if (attr_form_is_block (attr)
15757 && ((DW_BLOCK (attr)->data[0] == DW_OP_addr
15758 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size)
15759 || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index
15760 && (DW_BLOCK (attr)->size
15761 == 1 + leb128_size (&DW_BLOCK (attr)->data[1])))))
15763 unsigned int dummy;
15765 if (DW_BLOCK (attr)->data[0] == DW_OP_addr)
15766 SYMBOL_VALUE_ADDRESS (sym) =
15767 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
15769 SYMBOL_VALUE_ADDRESS (sym) =
15770 read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy);
15771 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
15772 fixup_symbol_section (sym, objfile);
15773 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
15774 SYMBOL_SECTION (sym));
15778 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15779 expression evaluator, and use LOC_COMPUTED only when necessary
15780 (i.e. when the value of a register or memory location is
15781 referenced, or a thread-local block, etc.). Then again, it might
15782 not be worthwhile. I'm assuming that it isn't unless performance
15783 or memory numbers show me otherwise. */
15785 dwarf2_symbol_mark_computed (attr, sym, cu, 0);
15787 if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist)
15788 cu->has_loclist = 1;
15791 /* Given a pointer to a DWARF information entry, figure out if we need
15792 to make a symbol table entry for it, and if so, create a new entry
15793 and return a pointer to it.
15794 If TYPE is NULL, determine symbol type from the die, otherwise
15795 used the passed type.
15796 If SPACE is not NULL, use it to hold the new symbol. If it is
15797 NULL, allocate a new symbol on the objfile's obstack. */
15799 static struct symbol *
15800 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
15801 struct symbol *space)
15803 struct objfile *objfile = cu->objfile;
15804 struct symbol *sym = NULL;
15806 struct attribute *attr = NULL;
15807 struct attribute *attr2 = NULL;
15808 CORE_ADDR baseaddr;
15809 struct pending **list_to_add = NULL;
15811 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
15813 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
15815 name = dwarf2_name (die, cu);
15818 const char *linkagename;
15819 int suppress_add = 0;
15824 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
15825 OBJSTAT (objfile, n_syms++);
15827 /* Cache this symbol's name and the name's demangled form (if any). */
15828 SYMBOL_SET_LANGUAGE (sym, cu->language);
15829 linkagename = dwarf2_physname (name, die, cu);
15830 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
15832 /* Fortran does not have mangling standard and the mangling does differ
15833 between gfortran, iFort etc. */
15834 if (cu->language == language_fortran
15835 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
15836 symbol_set_demangled_name (&(sym->ginfo),
15837 dwarf2_full_name (name, die, cu),
15840 /* Default assumptions.
15841 Use the passed type or decode it from the die. */
15842 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
15843 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
15845 SYMBOL_TYPE (sym) = type;
15847 SYMBOL_TYPE (sym) = die_type (die, cu);
15848 attr = dwarf2_attr (die,
15849 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
15853 SYMBOL_LINE (sym) = DW_UNSND (attr);
15856 attr = dwarf2_attr (die,
15857 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
15861 int file_index = DW_UNSND (attr);
15863 if (cu->line_header == NULL
15864 || file_index > cu->line_header->num_file_names)
15865 complaint (&symfile_complaints,
15866 _("file index out of range"));
15867 else if (file_index > 0)
15869 struct file_entry *fe;
15871 fe = &cu->line_header->file_names[file_index - 1];
15872 SYMBOL_SYMTAB (sym) = fe->symtab;
15879 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
15882 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
15884 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
15885 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
15886 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
15887 add_symbol_to_list (sym, cu->list_in_scope);
15889 case DW_TAG_subprogram:
15890 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15892 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
15893 attr2 = dwarf2_attr (die, DW_AT_external, cu);
15894 if ((attr2 && (DW_UNSND (attr2) != 0))
15895 || cu->language == language_ada)
15897 /* Subprograms marked external are stored as a global symbol.
15898 Ada subprograms, whether marked external or not, are always
15899 stored as a global symbol, because we want to be able to
15900 access them globally. For instance, we want to be able
15901 to break on a nested subprogram without having to
15902 specify the context. */
15903 list_to_add = &global_symbols;
15907 list_to_add = cu->list_in_scope;
15910 case DW_TAG_inlined_subroutine:
15911 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15913 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
15914 SYMBOL_INLINED (sym) = 1;
15915 list_to_add = cu->list_in_scope;
15917 case DW_TAG_template_value_param:
15919 /* Fall through. */
15920 case DW_TAG_constant:
15921 case DW_TAG_variable:
15922 case DW_TAG_member:
15923 /* Compilation with minimal debug info may result in
15924 variables with missing type entries. Change the
15925 misleading `void' type to something sensible. */
15926 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
15928 = objfile_type (objfile)->nodebug_data_symbol;
15930 attr = dwarf2_attr (die, DW_AT_const_value, cu);
15931 /* In the case of DW_TAG_member, we should only be called for
15932 static const members. */
15933 if (die->tag == DW_TAG_member)
15935 /* dwarf2_add_field uses die_is_declaration,
15936 so we do the same. */
15937 gdb_assert (die_is_declaration (die, cu));
15942 dwarf2_const_value (attr, sym, cu);
15943 attr2 = dwarf2_attr (die, DW_AT_external, cu);
15946 if (attr2 && (DW_UNSND (attr2) != 0))
15947 list_to_add = &global_symbols;
15949 list_to_add = cu->list_in_scope;
15953 attr = dwarf2_attr (die, DW_AT_location, cu);
15956 var_decode_location (attr, sym, cu);
15957 attr2 = dwarf2_attr (die, DW_AT_external, cu);
15959 /* Fortran explicitly imports any global symbols to the local
15960 scope by DW_TAG_common_block. */
15961 if (cu->language == language_fortran && die->parent
15962 && die->parent->tag == DW_TAG_common_block)
15965 if (SYMBOL_CLASS (sym) == LOC_STATIC
15966 && SYMBOL_VALUE_ADDRESS (sym) == 0
15967 && !dwarf2_per_objfile->has_section_at_zero)
15969 /* When a static variable is eliminated by the linker,
15970 the corresponding debug information is not stripped
15971 out, but the variable address is set to null;
15972 do not add such variables into symbol table. */
15974 else if (attr2 && (DW_UNSND (attr2) != 0))
15976 /* Workaround gfortran PR debug/40040 - it uses
15977 DW_AT_location for variables in -fPIC libraries which may
15978 get overriden by other libraries/executable and get
15979 a different address. Resolve it by the minimal symbol
15980 which may come from inferior's executable using copy
15981 relocation. Make this workaround only for gfortran as for
15982 other compilers GDB cannot guess the minimal symbol
15983 Fortran mangling kind. */
15984 if (cu->language == language_fortran && die->parent
15985 && die->parent->tag == DW_TAG_module
15987 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
15988 SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED;
15990 /* A variable with DW_AT_external is never static,
15991 but it may be block-scoped. */
15992 list_to_add = (cu->list_in_scope == &file_symbols
15993 ? &global_symbols : cu->list_in_scope);
15996 list_to_add = cu->list_in_scope;
16000 /* We do not know the address of this symbol.
16001 If it is an external symbol and we have type information
16002 for it, enter the symbol as a LOC_UNRESOLVED symbol.
16003 The address of the variable will then be determined from
16004 the minimal symbol table whenever the variable is
16006 attr2 = dwarf2_attr (die, DW_AT_external, cu);
16008 /* Fortran explicitly imports any global symbols to the local
16009 scope by DW_TAG_common_block. */
16010 if (cu->language == language_fortran && die->parent
16011 && die->parent->tag == DW_TAG_common_block)
16013 /* SYMBOL_CLASS doesn't matter here because
16014 read_common_block is going to reset it. */
16016 list_to_add = cu->list_in_scope;
16018 else if (attr2 && (DW_UNSND (attr2) != 0)
16019 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
16021 /* A variable with DW_AT_external is never static, but it
16022 may be block-scoped. */
16023 list_to_add = (cu->list_in_scope == &file_symbols
16024 ? &global_symbols : cu->list_in_scope);
16026 SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED;
16028 else if (!die_is_declaration (die, cu))
16030 /* Use the default LOC_OPTIMIZED_OUT class. */
16031 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
16033 list_to_add = cu->list_in_scope;
16037 case DW_TAG_formal_parameter:
16038 /* If we are inside a function, mark this as an argument. If
16039 not, we might be looking at an argument to an inlined function
16040 when we do not have enough information to show inlined frames;
16041 pretend it's a local variable in that case so that the user can
16043 if (context_stack_depth > 0
16044 && context_stack[context_stack_depth - 1].name != NULL)
16045 SYMBOL_IS_ARGUMENT (sym) = 1;
16046 attr = dwarf2_attr (die, DW_AT_location, cu);
16049 var_decode_location (attr, sym, cu);
16051 attr = dwarf2_attr (die, DW_AT_const_value, cu);
16054 dwarf2_const_value (attr, sym, cu);
16057 list_to_add = cu->list_in_scope;
16059 case DW_TAG_unspecified_parameters:
16060 /* From varargs functions; gdb doesn't seem to have any
16061 interest in this information, so just ignore it for now.
16064 case DW_TAG_template_type_param:
16066 /* Fall through. */
16067 case DW_TAG_class_type:
16068 case DW_TAG_interface_type:
16069 case DW_TAG_structure_type:
16070 case DW_TAG_union_type:
16071 case DW_TAG_set_type:
16072 case DW_TAG_enumeration_type:
16073 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
16074 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
16077 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
16078 really ever be static objects: otherwise, if you try
16079 to, say, break of a class's method and you're in a file
16080 which doesn't mention that class, it won't work unless
16081 the check for all static symbols in lookup_symbol_aux
16082 saves you. See the OtherFileClass tests in
16083 gdb.c++/namespace.exp. */
16087 list_to_add = (cu->list_in_scope == &file_symbols
16088 && (cu->language == language_cplus
16089 || cu->language == language_java)
16090 ? &global_symbols : cu->list_in_scope);
16092 /* The semantics of C++ state that "struct foo {
16093 ... }" also defines a typedef for "foo". A Java
16094 class declaration also defines a typedef for the
16096 if (cu->language == language_cplus
16097 || cu->language == language_java
16098 || cu->language == language_ada)
16100 /* The symbol's name is already allocated along
16101 with this objfile, so we don't need to
16102 duplicate it for the type. */
16103 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
16104 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
16109 case DW_TAG_typedef:
16110 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
16111 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
16112 list_to_add = cu->list_in_scope;
16114 case DW_TAG_base_type:
16115 case DW_TAG_subrange_type:
16116 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
16117 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
16118 list_to_add = cu->list_in_scope;
16120 case DW_TAG_enumerator:
16121 attr = dwarf2_attr (die, DW_AT_const_value, cu);
16124 dwarf2_const_value (attr, sym, cu);
16127 /* NOTE: carlton/2003-11-10: See comment above in the
16128 DW_TAG_class_type, etc. block. */
16130 list_to_add = (cu->list_in_scope == &file_symbols
16131 && (cu->language == language_cplus
16132 || cu->language == language_java)
16133 ? &global_symbols : cu->list_in_scope);
16136 case DW_TAG_namespace:
16137 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
16138 list_to_add = &global_symbols;
16140 case DW_TAG_common_block:
16141 SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK;
16142 SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN;
16143 add_symbol_to_list (sym, cu->list_in_scope);
16146 /* Not a tag we recognize. Hopefully we aren't processing
16147 trash data, but since we must specifically ignore things
16148 we don't recognize, there is nothing else we should do at
16150 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
16151 dwarf_tag_name (die->tag));
16157 sym->hash_next = objfile->template_symbols;
16158 objfile->template_symbols = sym;
16159 list_to_add = NULL;
16162 if (list_to_add != NULL)
16163 add_symbol_to_list (sym, list_to_add);
16165 /* For the benefit of old versions of GCC, check for anonymous
16166 namespaces based on the demangled name. */
16167 if (!cu->processing_has_namespace_info
16168 && cu->language == language_cplus)
16169 cp_scan_for_anonymous_namespaces (sym, objfile);
16174 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16176 static struct symbol *
16177 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
16179 return new_symbol_full (die, type, cu, NULL);
16182 /* Given an attr with a DW_FORM_dataN value in host byte order,
16183 zero-extend it as appropriate for the symbol's type. The DWARF
16184 standard (v4) is not entirely clear about the meaning of using
16185 DW_FORM_dataN for a constant with a signed type, where the type is
16186 wider than the data. The conclusion of a discussion on the DWARF
16187 list was that this is unspecified. We choose to always zero-extend
16188 because that is the interpretation long in use by GCC. */
16191 dwarf2_const_value_data (struct attribute *attr, struct type *type,
16192 const char *name, struct obstack *obstack,
16193 struct dwarf2_cu *cu, LONGEST *value, int bits)
16195 struct objfile *objfile = cu->objfile;
16196 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
16197 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
16198 LONGEST l = DW_UNSND (attr);
16200 if (bits < sizeof (*value) * 8)
16202 l &= ((LONGEST) 1 << bits) - 1;
16205 else if (bits == sizeof (*value) * 8)
16209 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
16210 store_unsigned_integer (bytes, bits / 8, byte_order, l);
16217 /* Read a constant value from an attribute. Either set *VALUE, or if
16218 the value does not fit in *VALUE, set *BYTES - either already
16219 allocated on the objfile obstack, or newly allocated on OBSTACK,
16220 or, set *BATON, if we translated the constant to a location
16224 dwarf2_const_value_attr (struct attribute *attr, struct type *type,
16225 const char *name, struct obstack *obstack,
16226 struct dwarf2_cu *cu,
16227 LONGEST *value, gdb_byte **bytes,
16228 struct dwarf2_locexpr_baton **baton)
16230 struct objfile *objfile = cu->objfile;
16231 struct comp_unit_head *cu_header = &cu->header;
16232 struct dwarf_block *blk;
16233 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
16234 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
16240 switch (attr->form)
16243 case DW_FORM_GNU_addr_index:
16247 if (TYPE_LENGTH (type) != cu_header->addr_size)
16248 dwarf2_const_value_length_mismatch_complaint (name,
16249 cu_header->addr_size,
16250 TYPE_LENGTH (type));
16251 /* Symbols of this form are reasonably rare, so we just
16252 piggyback on the existing location code rather than writing
16253 a new implementation of symbol_computed_ops. */
16254 *baton = obstack_alloc (&objfile->objfile_obstack,
16255 sizeof (struct dwarf2_locexpr_baton));
16256 (*baton)->per_cu = cu->per_cu;
16257 gdb_assert ((*baton)->per_cu);
16259 (*baton)->size = 2 + cu_header->addr_size;
16260 data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
16261 (*baton)->data = data;
16263 data[0] = DW_OP_addr;
16264 store_unsigned_integer (&data[1], cu_header->addr_size,
16265 byte_order, DW_ADDR (attr));
16266 data[cu_header->addr_size + 1] = DW_OP_stack_value;
16269 case DW_FORM_string:
16271 case DW_FORM_GNU_str_index:
16272 case DW_FORM_GNU_strp_alt:
16273 /* DW_STRING is already allocated on the objfile obstack, point
16275 *bytes = (gdb_byte *) DW_STRING (attr);
16277 case DW_FORM_block1:
16278 case DW_FORM_block2:
16279 case DW_FORM_block4:
16280 case DW_FORM_block:
16281 case DW_FORM_exprloc:
16282 blk = DW_BLOCK (attr);
16283 if (TYPE_LENGTH (type) != blk->size)
16284 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
16285 TYPE_LENGTH (type));
16286 *bytes = blk->data;
16289 /* The DW_AT_const_value attributes are supposed to carry the
16290 symbol's value "represented as it would be on the target
16291 architecture." By the time we get here, it's already been
16292 converted to host endianness, so we just need to sign- or
16293 zero-extend it as appropriate. */
16294 case DW_FORM_data1:
16295 *bytes = dwarf2_const_value_data (attr, type, name,
16296 obstack, cu, value, 8);
16298 case DW_FORM_data2:
16299 *bytes = dwarf2_const_value_data (attr, type, name,
16300 obstack, cu, value, 16);
16302 case DW_FORM_data4:
16303 *bytes = dwarf2_const_value_data (attr, type, name,
16304 obstack, cu, value, 32);
16306 case DW_FORM_data8:
16307 *bytes = dwarf2_const_value_data (attr, type, name,
16308 obstack, cu, value, 64);
16311 case DW_FORM_sdata:
16312 *value = DW_SND (attr);
16315 case DW_FORM_udata:
16316 *value = DW_UNSND (attr);
16320 complaint (&symfile_complaints,
16321 _("unsupported const value attribute form: '%s'"),
16322 dwarf_form_name (attr->form));
16329 /* Copy constant value from an attribute to a symbol. */
16332 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
16333 struct dwarf2_cu *cu)
16335 struct objfile *objfile = cu->objfile;
16336 struct comp_unit_head *cu_header = &cu->header;
16339 struct dwarf2_locexpr_baton *baton;
16341 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
16342 SYMBOL_PRINT_NAME (sym),
16343 &objfile->objfile_obstack, cu,
16344 &value, &bytes, &baton);
16348 SYMBOL_LOCATION_BATON (sym) = baton;
16349 SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index;
16351 else if (bytes != NULL)
16353 SYMBOL_VALUE_BYTES (sym) = bytes;
16354 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
16358 SYMBOL_VALUE (sym) = value;
16359 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
16363 /* Return the type of the die in question using its DW_AT_type attribute. */
16365 static struct type *
16366 die_type (struct die_info *die, struct dwarf2_cu *cu)
16368 struct attribute *type_attr;
16370 type_attr = dwarf2_attr (die, DW_AT_type, cu);
16373 /* A missing DW_AT_type represents a void type. */
16374 return objfile_type (cu->objfile)->builtin_void;
16377 return lookup_die_type (die, type_attr, cu);
16380 /* True iff CU's producer generates GNAT Ada auxiliary information
16381 that allows to find parallel types through that information instead
16382 of having to do expensive parallel lookups by type name. */
16385 need_gnat_info (struct dwarf2_cu *cu)
16387 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16388 of GNAT produces this auxiliary information, without any indication
16389 that it is produced. Part of enhancing the FSF version of GNAT
16390 to produce that information will be to put in place an indicator
16391 that we can use in order to determine whether the descriptive type
16392 info is available or not. One suggestion that has been made is
16393 to use a new attribute, attached to the CU die. For now, assume
16394 that the descriptive type info is not available. */
16398 /* Return the auxiliary type of the die in question using its
16399 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16400 attribute is not present. */
16402 static struct type *
16403 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
16405 struct attribute *type_attr;
16407 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
16411 return lookup_die_type (die, type_attr, cu);
16414 /* If DIE has a descriptive_type attribute, then set the TYPE's
16415 descriptive type accordingly. */
16418 set_descriptive_type (struct type *type, struct die_info *die,
16419 struct dwarf2_cu *cu)
16421 struct type *descriptive_type = die_descriptive_type (die, cu);
16423 if (descriptive_type)
16425 ALLOCATE_GNAT_AUX_TYPE (type);
16426 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
16430 /* Return the containing type of the die in question using its
16431 DW_AT_containing_type attribute. */
16433 static struct type *
16434 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
16436 struct attribute *type_attr;
16438 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
16440 error (_("Dwarf Error: Problem turning containing type into gdb type "
16441 "[in module %s]"), cu->objfile->name);
16443 return lookup_die_type (die, type_attr, cu);
16446 /* Look up the type of DIE in CU using its type attribute ATTR.
16447 If there is no type substitute an error marker. */
16449 static struct type *
16450 lookup_die_type (struct die_info *die, struct attribute *attr,
16451 struct dwarf2_cu *cu)
16453 struct objfile *objfile = cu->objfile;
16454 struct type *this_type;
16456 /* First see if we have it cached. */
16458 if (attr->form == DW_FORM_GNU_ref_alt)
16460 struct dwarf2_per_cu_data *per_cu;
16461 sect_offset offset = dwarf2_get_ref_die_offset (attr);
16463 per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile);
16464 this_type = get_die_type_at_offset (offset, per_cu);
16466 else if (is_ref_attr (attr))
16468 sect_offset offset = dwarf2_get_ref_die_offset (attr);
16470 this_type = get_die_type_at_offset (offset, cu->per_cu);
16472 else if (attr->form == DW_FORM_ref_sig8)
16474 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
16476 /* sig_type will be NULL if the signatured type is missing from
16478 if (sig_type == NULL)
16479 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16480 "at 0x%x [in module %s]"),
16481 die->offset.sect_off, objfile->name);
16483 gdb_assert (sig_type->per_cu.is_debug_types);
16484 /* If we haven't filled in type_offset_in_section yet, then we
16485 haven't read the type in yet. */
16487 if (sig_type->type_offset_in_section.sect_off != 0)
16490 get_die_type_at_offset (sig_type->type_offset_in_section,
16491 &sig_type->per_cu);
16496 dump_die_for_error (die);
16497 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16498 dwarf_attr_name (attr->name), objfile->name);
16501 /* If not cached we need to read it in. */
16503 if (this_type == NULL)
16505 struct die_info *type_die;
16506 struct dwarf2_cu *type_cu = cu;
16508 type_die = follow_die_ref_or_sig (die, attr, &type_cu);
16509 /* If we found the type now, it's probably because the type came
16510 from an inter-CU reference and the type's CU got expanded before
16512 this_type = get_die_type (type_die, type_cu);
16513 if (this_type == NULL)
16514 this_type = read_type_die_1 (type_die, type_cu);
16517 /* If we still don't have a type use an error marker. */
16519 if (this_type == NULL)
16521 char *message, *saved;
16523 /* read_type_die already issued a complaint. */
16524 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16526 cu->header.offset.sect_off,
16527 die->offset.sect_off);
16528 saved = obstack_copy0 (&objfile->objfile_obstack,
16529 message, strlen (message));
16532 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile);
16538 /* Return the type in DIE, CU.
16539 Returns NULL for invalid types.
16541 This first does a lookup in the appropriate type_hash table,
16542 and only reads the die in if necessary.
16544 NOTE: This can be called when reading in partial or full symbols. */
16546 static struct type *
16547 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
16549 struct type *this_type;
16551 this_type = get_die_type (die, cu);
16555 return read_type_die_1 (die, cu);
16558 /* Read the type in DIE, CU.
16559 Returns NULL for invalid types. */
16561 static struct type *
16562 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
16564 struct type *this_type = NULL;
16568 case DW_TAG_class_type:
16569 case DW_TAG_interface_type:
16570 case DW_TAG_structure_type:
16571 case DW_TAG_union_type:
16572 this_type = read_structure_type (die, cu);
16574 case DW_TAG_enumeration_type:
16575 this_type = read_enumeration_type (die, cu);
16577 case DW_TAG_subprogram:
16578 case DW_TAG_subroutine_type:
16579 case DW_TAG_inlined_subroutine:
16580 this_type = read_subroutine_type (die, cu);
16582 case DW_TAG_array_type:
16583 this_type = read_array_type (die, cu);
16585 case DW_TAG_set_type:
16586 this_type = read_set_type (die, cu);
16588 case DW_TAG_pointer_type:
16589 this_type = read_tag_pointer_type (die, cu);
16591 case DW_TAG_ptr_to_member_type:
16592 this_type = read_tag_ptr_to_member_type (die, cu);
16594 case DW_TAG_reference_type:
16595 this_type = read_tag_reference_type (die, cu);
16597 case DW_TAG_const_type:
16598 this_type = read_tag_const_type (die, cu);
16600 case DW_TAG_volatile_type:
16601 this_type = read_tag_volatile_type (die, cu);
16603 case DW_TAG_restrict_type:
16604 this_type = read_tag_restrict_type (die, cu);
16606 case DW_TAG_string_type:
16607 this_type = read_tag_string_type (die, cu);
16609 case DW_TAG_typedef:
16610 this_type = read_typedef (die, cu);
16612 case DW_TAG_subrange_type:
16613 this_type = read_subrange_type (die, cu);
16615 case DW_TAG_base_type:
16616 this_type = read_base_type (die, cu);
16618 case DW_TAG_unspecified_type:
16619 this_type = read_unspecified_type (die, cu);
16621 case DW_TAG_namespace:
16622 this_type = read_namespace_type (die, cu);
16624 case DW_TAG_module:
16625 this_type = read_module_type (die, cu);
16628 complaint (&symfile_complaints,
16629 _("unexpected tag in read_type_die: '%s'"),
16630 dwarf_tag_name (die->tag));
16637 /* See if we can figure out if the class lives in a namespace. We do
16638 this by looking for a member function; its demangled name will
16639 contain namespace info, if there is any.
16640 Return the computed name or NULL.
16641 Space for the result is allocated on the objfile's obstack.
16642 This is the full-die version of guess_partial_die_structure_name.
16643 In this case we know DIE has no useful parent. */
16646 guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu)
16648 struct die_info *spec_die;
16649 struct dwarf2_cu *spec_cu;
16650 struct die_info *child;
16653 spec_die = die_specification (die, &spec_cu);
16654 if (spec_die != NULL)
16660 for (child = die->child;
16662 child = child->sibling)
16664 if (child->tag == DW_TAG_subprogram)
16666 struct attribute *attr;
16668 attr = dwarf2_attr (child, DW_AT_linkage_name, cu);
16670 attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu);
16674 = language_class_name_from_physname (cu->language_defn,
16678 if (actual_name != NULL)
16680 const char *die_name = dwarf2_name (die, cu);
16682 if (die_name != NULL
16683 && strcmp (die_name, actual_name) != 0)
16685 /* Strip off the class name from the full name.
16686 We want the prefix. */
16687 int die_name_len = strlen (die_name);
16688 int actual_name_len = strlen (actual_name);
16690 /* Test for '::' as a sanity check. */
16691 if (actual_name_len > die_name_len + 2
16692 && actual_name[actual_name_len
16693 - die_name_len - 1] == ':')
16695 obstack_copy0 (&cu->objfile->objfile_obstack,
16697 actual_name_len - die_name_len - 2);
16700 xfree (actual_name);
16709 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16710 prefix part in such case. See
16711 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16714 anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu)
16716 struct attribute *attr;
16719 if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type
16720 && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type)
16723 attr = dwarf2_attr (die, DW_AT_name, cu);
16724 if (attr != NULL && DW_STRING (attr) != NULL)
16727 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
16729 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
16730 if (attr == NULL || DW_STRING (attr) == NULL)
16733 /* dwarf2_name had to be already called. */
16734 gdb_assert (DW_STRING_IS_CANONICAL (attr));
16736 /* Strip the base name, keep any leading namespaces/classes. */
16737 base = strrchr (DW_STRING (attr), ':');
16738 if (base == NULL || base == DW_STRING (attr) || base[-1] != ':')
16741 return obstack_copy0 (&cu->objfile->objfile_obstack,
16742 DW_STRING (attr), &base[-1] - DW_STRING (attr));
16745 /* Return the name of the namespace/class that DIE is defined within,
16746 or "" if we can't tell. The caller should not xfree the result.
16748 For example, if we're within the method foo() in the following
16758 then determine_prefix on foo's die will return "N::C". */
16760 static const char *
16761 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
16763 struct die_info *parent, *spec_die;
16764 struct dwarf2_cu *spec_cu;
16765 struct type *parent_type;
16768 if (cu->language != language_cplus && cu->language != language_java
16769 && cu->language != language_fortran)
16772 retval = anonymous_struct_prefix (die, cu);
16776 /* We have to be careful in the presence of DW_AT_specification.
16777 For example, with GCC 3.4, given the code
16781 // Definition of N::foo.
16785 then we'll have a tree of DIEs like this:
16787 1: DW_TAG_compile_unit
16788 2: DW_TAG_namespace // N
16789 3: DW_TAG_subprogram // declaration of N::foo
16790 4: DW_TAG_subprogram // definition of N::foo
16791 DW_AT_specification // refers to die #3
16793 Thus, when processing die #4, we have to pretend that we're in
16794 the context of its DW_AT_specification, namely the contex of die
16797 spec_die = die_specification (die, &spec_cu);
16798 if (spec_die == NULL)
16799 parent = die->parent;
16802 parent = spec_die->parent;
16806 if (parent == NULL)
16808 else if (parent->building_fullname)
16811 const char *parent_name;
16813 /* It has been seen on RealView 2.2 built binaries,
16814 DW_TAG_template_type_param types actually _defined_ as
16815 children of the parent class:
16818 template class <class Enum> Class{};
16819 Class<enum E> class_e;
16821 1: DW_TAG_class_type (Class)
16822 2: DW_TAG_enumeration_type (E)
16823 3: DW_TAG_enumerator (enum1:0)
16824 3: DW_TAG_enumerator (enum2:1)
16826 2: DW_TAG_template_type_param
16827 DW_AT_type DW_FORM_ref_udata (E)
16829 Besides being broken debug info, it can put GDB into an
16830 infinite loop. Consider:
16832 When we're building the full name for Class<E>, we'll start
16833 at Class, and go look over its template type parameters,
16834 finding E. We'll then try to build the full name of E, and
16835 reach here. We're now trying to build the full name of E,
16836 and look over the parent DIE for containing scope. In the
16837 broken case, if we followed the parent DIE of E, we'd again
16838 find Class, and once again go look at its template type
16839 arguments, etc., etc. Simply don't consider such parent die
16840 as source-level parent of this die (it can't be, the language
16841 doesn't allow it), and break the loop here. */
16842 name = dwarf2_name (die, cu);
16843 parent_name = dwarf2_name (parent, cu);
16844 complaint (&symfile_complaints,
16845 _("template param type '%s' defined within parent '%s'"),
16846 name ? name : "<unknown>",
16847 parent_name ? parent_name : "<unknown>");
16851 switch (parent->tag)
16853 case DW_TAG_namespace:
16854 parent_type = read_type_die (parent, cu);
16855 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16856 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16857 Work around this problem here. */
16858 if (cu->language == language_cplus
16859 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
16861 /* We give a name to even anonymous namespaces. */
16862 return TYPE_TAG_NAME (parent_type);
16863 case DW_TAG_class_type:
16864 case DW_TAG_interface_type:
16865 case DW_TAG_structure_type:
16866 case DW_TAG_union_type:
16867 case DW_TAG_module:
16868 parent_type = read_type_die (parent, cu);
16869 if (TYPE_TAG_NAME (parent_type) != NULL)
16870 return TYPE_TAG_NAME (parent_type);
16872 /* An anonymous structure is only allowed non-static data
16873 members; no typedefs, no member functions, et cetera.
16874 So it does not need a prefix. */
16876 case DW_TAG_compile_unit:
16877 case DW_TAG_partial_unit:
16878 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16879 if (cu->language == language_cplus
16880 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
16881 && die->child != NULL
16882 && (die->tag == DW_TAG_class_type
16883 || die->tag == DW_TAG_structure_type
16884 || die->tag == DW_TAG_union_type))
16886 char *name = guess_full_die_structure_name (die, cu);
16892 return determine_prefix (parent, cu);
16896 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16897 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16898 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16899 an obconcat, otherwise allocate storage for the result. The CU argument is
16900 used to determine the language and hence, the appropriate separator. */
16902 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16905 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
16906 int physname, struct dwarf2_cu *cu)
16908 const char *lead = "";
16911 if (suffix == NULL || suffix[0] == '\0'
16912 || prefix == NULL || prefix[0] == '\0')
16914 else if (cu->language == language_java)
16916 else if (cu->language == language_fortran && physname)
16918 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16919 DW_AT_MIPS_linkage_name is preferred and used instead. */
16927 if (prefix == NULL)
16929 if (suffix == NULL)
16935 = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
16937 strcpy (retval, lead);
16938 strcat (retval, prefix);
16939 strcat (retval, sep);
16940 strcat (retval, suffix);
16945 /* We have an obstack. */
16946 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
16950 /* Return sibling of die, NULL if no sibling. */
16952 static struct die_info *
16953 sibling_die (struct die_info *die)
16955 return die->sibling;
16958 /* Get name of a die, return NULL if not found. */
16960 static const char *
16961 dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu,
16962 struct obstack *obstack)
16964 if (name && cu->language == language_cplus)
16966 char *canon_name = cp_canonicalize_string (name);
16968 if (canon_name != NULL)
16970 if (strcmp (canon_name, name) != 0)
16971 name = obstack_copy0 (obstack, canon_name, strlen (canon_name));
16972 xfree (canon_name);
16979 /* Get name of a die, return NULL if not found. */
16981 static const char *
16982 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
16984 struct attribute *attr;
16986 attr = dwarf2_attr (die, DW_AT_name, cu);
16987 if ((!attr || !DW_STRING (attr))
16988 && die->tag != DW_TAG_class_type
16989 && die->tag != DW_TAG_interface_type
16990 && die->tag != DW_TAG_structure_type
16991 && die->tag != DW_TAG_union_type)
16996 case DW_TAG_compile_unit:
16997 case DW_TAG_partial_unit:
16998 /* Compilation units have a DW_AT_name that is a filename, not
16999 a source language identifier. */
17000 case DW_TAG_enumeration_type:
17001 case DW_TAG_enumerator:
17002 /* These tags always have simple identifiers already; no need
17003 to canonicalize them. */
17004 return DW_STRING (attr);
17006 case DW_TAG_subprogram:
17007 /* Java constructors will all be named "<init>", so return
17008 the class name when we see this special case. */
17009 if (cu->language == language_java
17010 && DW_STRING (attr) != NULL
17011 && strcmp (DW_STRING (attr), "<init>") == 0)
17013 struct dwarf2_cu *spec_cu = cu;
17014 struct die_info *spec_die;
17016 /* GCJ will output '<init>' for Java constructor names.
17017 For this special case, return the name of the parent class. */
17019 /* GCJ may output suprogram DIEs with AT_specification set.
17020 If so, use the name of the specified DIE. */
17021 spec_die = die_specification (die, &spec_cu);
17022 if (spec_die != NULL)
17023 return dwarf2_name (spec_die, spec_cu);
17028 if (die->tag == DW_TAG_class_type)
17029 return dwarf2_name (die, cu);
17031 while (die->tag != DW_TAG_compile_unit
17032 && die->tag != DW_TAG_partial_unit);
17036 case DW_TAG_class_type:
17037 case DW_TAG_interface_type:
17038 case DW_TAG_structure_type:
17039 case DW_TAG_union_type:
17040 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
17041 structures or unions. These were of the form "._%d" in GCC 4.1,
17042 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
17043 and GCC 4.4. We work around this problem by ignoring these. */
17044 if (attr && DW_STRING (attr)
17045 && (strncmp (DW_STRING (attr), "._", 2) == 0
17046 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0))
17049 /* GCC might emit a nameless typedef that has a linkage name. See
17050 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
17051 if (!attr || DW_STRING (attr) == NULL)
17053 char *demangled = NULL;
17055 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
17057 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
17059 if (attr == NULL || DW_STRING (attr) == NULL)
17062 /* Avoid demangling DW_STRING (attr) the second time on a second
17063 call for the same DIE. */
17064 if (!DW_STRING_IS_CANONICAL (attr))
17065 demangled = cplus_demangle (DW_STRING (attr), DMGL_TYPES);
17071 /* FIXME: we already did this for the partial symbol... */
17072 DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack,
17073 demangled, strlen (demangled));
17074 DW_STRING_IS_CANONICAL (attr) = 1;
17077 /* Strip any leading namespaces/classes, keep only the base name.
17078 DW_AT_name for named DIEs does not contain the prefixes. */
17079 base = strrchr (DW_STRING (attr), ':');
17080 if (base && base > DW_STRING (attr) && base[-1] == ':')
17083 return DW_STRING (attr);
17092 if (!DW_STRING_IS_CANONICAL (attr))
17095 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
17096 &cu->objfile->objfile_obstack);
17097 DW_STRING_IS_CANONICAL (attr) = 1;
17099 return DW_STRING (attr);
17102 /* Return the die that this die in an extension of, or NULL if there
17103 is none. *EXT_CU is the CU containing DIE on input, and the CU
17104 containing the return value on output. */
17106 static struct die_info *
17107 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
17109 struct attribute *attr;
17111 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
17115 return follow_die_ref (die, attr, ext_cu);
17118 /* Convert a DIE tag into its string name. */
17120 static const char *
17121 dwarf_tag_name (unsigned tag)
17123 const char *name = get_DW_TAG_name (tag);
17126 return "DW_TAG_<unknown>";
17131 /* Convert a DWARF attribute code into its string name. */
17133 static const char *
17134 dwarf_attr_name (unsigned attr)
17138 #ifdef MIPS /* collides with DW_AT_HP_block_index */
17139 if (attr == DW_AT_MIPS_fde)
17140 return "DW_AT_MIPS_fde";
17142 if (attr == DW_AT_HP_block_index)
17143 return "DW_AT_HP_block_index";
17146 name = get_DW_AT_name (attr);
17149 return "DW_AT_<unknown>";
17154 /* Convert a DWARF value form code into its string name. */
17156 static const char *
17157 dwarf_form_name (unsigned form)
17159 const char *name = get_DW_FORM_name (form);
17162 return "DW_FORM_<unknown>";
17168 dwarf_bool_name (unsigned mybool)
17176 /* Convert a DWARF type code into its string name. */
17178 static const char *
17179 dwarf_type_encoding_name (unsigned enc)
17181 const char *name = get_DW_ATE_name (enc);
17184 return "DW_ATE_<unknown>";
17190 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
17194 print_spaces (indent, f);
17195 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
17196 dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off);
17198 if (die->parent != NULL)
17200 print_spaces (indent, f);
17201 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
17202 die->parent->offset.sect_off);
17205 print_spaces (indent, f);
17206 fprintf_unfiltered (f, " has children: %s\n",
17207 dwarf_bool_name (die->child != NULL));
17209 print_spaces (indent, f);
17210 fprintf_unfiltered (f, " attributes:\n");
17212 for (i = 0; i < die->num_attrs; ++i)
17214 print_spaces (indent, f);
17215 fprintf_unfiltered (f, " %s (%s) ",
17216 dwarf_attr_name (die->attrs[i].name),
17217 dwarf_form_name (die->attrs[i].form));
17219 switch (die->attrs[i].form)
17222 case DW_FORM_GNU_addr_index:
17223 fprintf_unfiltered (f, "address: ");
17224 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
17226 case DW_FORM_block2:
17227 case DW_FORM_block4:
17228 case DW_FORM_block:
17229 case DW_FORM_block1:
17230 fprintf_unfiltered (f, "block: size %s",
17231 pulongest (DW_BLOCK (&die->attrs[i])->size));
17233 case DW_FORM_exprloc:
17234 fprintf_unfiltered (f, "expression: size %s",
17235 pulongest (DW_BLOCK (&die->attrs[i])->size));
17237 case DW_FORM_ref_addr:
17238 fprintf_unfiltered (f, "ref address: ");
17239 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
17241 case DW_FORM_GNU_ref_alt:
17242 fprintf_unfiltered (f, "alt ref address: ");
17243 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
17249 case DW_FORM_ref_udata:
17250 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
17251 (long) (DW_UNSND (&die->attrs[i])));
17253 case DW_FORM_data1:
17254 case DW_FORM_data2:
17255 case DW_FORM_data4:
17256 case DW_FORM_data8:
17257 case DW_FORM_udata:
17258 case DW_FORM_sdata:
17259 fprintf_unfiltered (f, "constant: %s",
17260 pulongest (DW_UNSND (&die->attrs[i])));
17262 case DW_FORM_sec_offset:
17263 fprintf_unfiltered (f, "section offset: %s",
17264 pulongest (DW_UNSND (&die->attrs[i])));
17266 case DW_FORM_ref_sig8:
17267 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
17269 struct signatured_type *sig_type =
17270 DW_SIGNATURED_TYPE (&die->attrs[i]);
17272 fprintf_unfiltered (f, "signatured type: 0x%s, offset 0x%x",
17273 hex_string (sig_type->signature),
17274 sig_type->per_cu.offset.sect_off);
17277 fprintf_unfiltered (f, "signatured type, unknown");
17279 case DW_FORM_string:
17281 case DW_FORM_GNU_str_index:
17282 case DW_FORM_GNU_strp_alt:
17283 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
17284 DW_STRING (&die->attrs[i])
17285 ? DW_STRING (&die->attrs[i]) : "",
17286 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
17289 if (DW_UNSND (&die->attrs[i]))
17290 fprintf_unfiltered (f, "flag: TRUE");
17292 fprintf_unfiltered (f, "flag: FALSE");
17294 case DW_FORM_flag_present:
17295 fprintf_unfiltered (f, "flag: TRUE");
17297 case DW_FORM_indirect:
17298 /* The reader will have reduced the indirect form to
17299 the "base form" so this form should not occur. */
17300 fprintf_unfiltered (f,
17301 "unexpected attribute form: DW_FORM_indirect");
17304 fprintf_unfiltered (f, "unsupported attribute form: %d.",
17305 die->attrs[i].form);
17308 fprintf_unfiltered (f, "\n");
17313 dump_die_for_error (struct die_info *die)
17315 dump_die_shallow (gdb_stderr, 0, die);
17319 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
17321 int indent = level * 4;
17323 gdb_assert (die != NULL);
17325 if (level >= max_level)
17328 dump_die_shallow (f, indent, die);
17330 if (die->child != NULL)
17332 print_spaces (indent, f);
17333 fprintf_unfiltered (f, " Children:");
17334 if (level + 1 < max_level)
17336 fprintf_unfiltered (f, "\n");
17337 dump_die_1 (f, level + 1, max_level, die->child);
17341 fprintf_unfiltered (f,
17342 " [not printed, max nesting level reached]\n");
17346 if (die->sibling != NULL && level > 0)
17348 dump_die_1 (f, level, max_level, die->sibling);
17352 /* This is called from the pdie macro in gdbinit.in.
17353 It's not static so gcc will keep a copy callable from gdb. */
17356 dump_die (struct die_info *die, int max_level)
17358 dump_die_1 (gdb_stdlog, 0, max_level, die);
17362 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
17366 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off,
17372 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17373 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17376 is_ref_attr (struct attribute *attr)
17378 switch (attr->form)
17380 case DW_FORM_ref_addr:
17385 case DW_FORM_ref_udata:
17386 case DW_FORM_GNU_ref_alt:
17393 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17397 dwarf2_get_ref_die_offset (struct attribute *attr)
17399 sect_offset retval = { DW_UNSND (attr) };
17401 if (is_ref_attr (attr))
17404 retval.sect_off = 0;
17405 complaint (&symfile_complaints,
17406 _("unsupported die ref attribute form: '%s'"),
17407 dwarf_form_name (attr->form));
17411 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17412 * the value held by the attribute is not constant. */
17415 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
17417 if (attr->form == DW_FORM_sdata)
17418 return DW_SND (attr);
17419 else if (attr->form == DW_FORM_udata
17420 || attr->form == DW_FORM_data1
17421 || attr->form == DW_FORM_data2
17422 || attr->form == DW_FORM_data4
17423 || attr->form == DW_FORM_data8)
17424 return DW_UNSND (attr);
17427 complaint (&symfile_complaints,
17428 _("Attribute value is not a constant (%s)"),
17429 dwarf_form_name (attr->form));
17430 return default_value;
17434 /* Follow reference or signature attribute ATTR of SRC_DIE.
17435 On entry *REF_CU is the CU of SRC_DIE.
17436 On exit *REF_CU is the CU of the result. */
17438 static struct die_info *
17439 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
17440 struct dwarf2_cu **ref_cu)
17442 struct die_info *die;
17444 if (is_ref_attr (attr))
17445 die = follow_die_ref (src_die, attr, ref_cu);
17446 else if (attr->form == DW_FORM_ref_sig8)
17447 die = follow_die_sig (src_die, attr, ref_cu);
17450 dump_die_for_error (src_die);
17451 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17452 (*ref_cu)->objfile->name);
17458 /* Follow reference OFFSET.
17459 On entry *REF_CU is the CU of the source die referencing OFFSET.
17460 On exit *REF_CU is the CU of the result.
17461 Returns NULL if OFFSET is invalid. */
17463 static struct die_info *
17464 follow_die_offset (sect_offset offset, int offset_in_dwz,
17465 struct dwarf2_cu **ref_cu)
17467 struct die_info temp_die;
17468 struct dwarf2_cu *target_cu, *cu = *ref_cu;
17470 gdb_assert (cu->per_cu != NULL);
17474 if (cu->per_cu->is_debug_types)
17476 /* .debug_types CUs cannot reference anything outside their CU.
17477 If they need to, they have to reference a signatured type via
17478 DW_FORM_ref_sig8. */
17479 if (! offset_in_cu_p (&cu->header, offset))
17482 else if (offset_in_dwz != cu->per_cu->is_dwz
17483 || ! offset_in_cu_p (&cu->header, offset))
17485 struct dwarf2_per_cu_data *per_cu;
17487 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
17490 /* If necessary, add it to the queue and load its DIEs. */
17491 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
17492 load_full_comp_unit (per_cu, cu->language);
17494 target_cu = per_cu->cu;
17496 else if (cu->dies == NULL)
17498 /* We're loading full DIEs during partial symbol reading. */
17499 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
17500 load_full_comp_unit (cu->per_cu, language_minimal);
17503 *ref_cu = target_cu;
17504 temp_die.offset = offset;
17505 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off);
17508 /* Follow reference attribute ATTR of SRC_DIE.
17509 On entry *REF_CU is the CU of SRC_DIE.
17510 On exit *REF_CU is the CU of the result. */
17512 static struct die_info *
17513 follow_die_ref (struct die_info *src_die, struct attribute *attr,
17514 struct dwarf2_cu **ref_cu)
17516 sect_offset offset = dwarf2_get_ref_die_offset (attr);
17517 struct dwarf2_cu *cu = *ref_cu;
17518 struct die_info *die;
17520 die = follow_die_offset (offset,
17521 (attr->form == DW_FORM_GNU_ref_alt
17522 || cu->per_cu->is_dwz),
17525 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17526 "at 0x%x [in module %s]"),
17527 offset.sect_off, src_die->offset.sect_off, cu->objfile->name);
17532 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17533 Returned value is intended for DW_OP_call*. Returned
17534 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17536 struct dwarf2_locexpr_baton
17537 dwarf2_fetch_die_loc_sect_off (sect_offset offset,
17538 struct dwarf2_per_cu_data *per_cu,
17539 CORE_ADDR (*get_frame_pc) (void *baton),
17542 struct dwarf2_cu *cu;
17543 struct die_info *die;
17544 struct attribute *attr;
17545 struct dwarf2_locexpr_baton retval;
17547 dw2_setup (per_cu->objfile);
17549 if (per_cu->cu == NULL)
17553 die = follow_die_offset (offset, per_cu->is_dwz, &cu);
17555 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17556 offset.sect_off, per_cu->objfile->name);
17558 attr = dwarf2_attr (die, DW_AT_location, cu);
17561 /* DWARF: "If there is no such attribute, then there is no effect.".
17562 DATA is ignored if SIZE is 0. */
17564 retval.data = NULL;
17567 else if (attr_form_is_section_offset (attr))
17569 struct dwarf2_loclist_baton loclist_baton;
17570 CORE_ADDR pc = (*get_frame_pc) (baton);
17573 fill_in_loclist_baton (cu, &loclist_baton, attr);
17575 retval.data = dwarf2_find_location_expression (&loclist_baton,
17577 retval.size = size;
17581 if (!attr_form_is_block (attr))
17582 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17583 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17584 offset.sect_off, per_cu->objfile->name);
17586 retval.data = DW_BLOCK (attr)->data;
17587 retval.size = DW_BLOCK (attr)->size;
17589 retval.per_cu = cu->per_cu;
17591 age_cached_comp_units ();
17596 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17599 struct dwarf2_locexpr_baton
17600 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu,
17601 struct dwarf2_per_cu_data *per_cu,
17602 CORE_ADDR (*get_frame_pc) (void *baton),
17605 sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off };
17607 return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton);
17610 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17614 dwarf2_get_die_type (cu_offset die_offset,
17615 struct dwarf2_per_cu_data *per_cu)
17617 sect_offset die_offset_sect;
17619 dw2_setup (per_cu->objfile);
17621 die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off;
17622 return get_die_type_at_offset (die_offset_sect, per_cu);
17625 /* Follow the signature attribute ATTR in SRC_DIE.
17626 On entry *REF_CU is the CU of SRC_DIE.
17627 On exit *REF_CU is the CU of the result. */
17629 static struct die_info *
17630 follow_die_sig (struct die_info *src_die, struct attribute *attr,
17631 struct dwarf2_cu **ref_cu)
17633 struct objfile *objfile = (*ref_cu)->objfile;
17634 struct die_info temp_die;
17635 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
17636 struct dwarf2_cu *sig_cu;
17637 struct die_info *die;
17639 /* sig_type will be NULL if the signatured type is missing from
17641 if (sig_type == NULL)
17642 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17643 "at 0x%x [in module %s]"),
17644 src_die->offset.sect_off, objfile->name);
17646 /* If necessary, add it to the queue and load its DIEs. */
17648 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal))
17649 read_signatured_type (sig_type);
17651 gdb_assert (sig_type->per_cu.cu != NULL);
17653 sig_cu = sig_type->per_cu.cu;
17654 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
17655 temp_die.offset = sig_type->type_offset_in_section;
17656 die = htab_find_with_hash (sig_cu->die_hash, &temp_die,
17657 temp_die.offset.sect_off);
17660 /* For .gdb_index version 7 keep track of included TUs.
17661 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
17662 if (dwarf2_per_objfile->index_table != NULL
17663 && dwarf2_per_objfile->index_table->version <= 7)
17665 VEC_safe_push (dwarf2_per_cu_ptr,
17666 (*ref_cu)->per_cu->imported_symtabs,
17674 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17675 "from DIE at 0x%x [in module %s]"),
17676 temp_die.offset.sect_off, src_die->offset.sect_off, objfile->name);
17679 /* Given an offset of a signatured type, return its signatured_type. */
17681 static struct signatured_type *
17682 lookup_signatured_type_at_offset (struct objfile *objfile,
17683 struct dwarf2_section_info *section,
17684 sect_offset offset)
17686 gdb_byte *info_ptr = section->buffer + offset.sect_off;
17687 unsigned int length, initial_length_size;
17688 unsigned int sig_offset;
17689 struct signatured_type find_entry, *sig_type;
17691 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
17692 sig_offset = (initial_length_size
17694 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
17695 + 1 /*address_size*/);
17696 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
17697 sig_type = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
17699 /* This is only used to lookup previously recorded types.
17700 If we didn't find it, it's our bug. */
17701 gdb_assert (sig_type != NULL);
17702 gdb_assert (offset.sect_off == sig_type->per_cu.offset.sect_off);
17707 /* Load the DIEs associated with type unit PER_CU into memory. */
17710 load_full_type_unit (struct dwarf2_per_cu_data *per_cu)
17712 struct signatured_type *sig_type;
17714 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17715 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
17717 /* We have the per_cu, but we need the signatured_type.
17718 Fortunately this is an easy translation. */
17719 gdb_assert (per_cu->is_debug_types);
17720 sig_type = (struct signatured_type *) per_cu;
17722 gdb_assert (per_cu->cu == NULL);
17724 read_signatured_type (sig_type);
17726 gdb_assert (per_cu->cu != NULL);
17729 /* die_reader_func for read_signatured_type.
17730 This is identical to load_full_comp_unit_reader,
17731 but is kept separate for now. */
17734 read_signatured_type_reader (const struct die_reader_specs *reader,
17735 gdb_byte *info_ptr,
17736 struct die_info *comp_unit_die,
17740 struct dwarf2_cu *cu = reader->cu;
17742 gdb_assert (cu->die_hash == NULL);
17744 htab_create_alloc_ex (cu->header.length / 12,
17748 &cu->comp_unit_obstack,
17749 hashtab_obstack_allocate,
17750 dummy_obstack_deallocate);
17753 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
17754 &info_ptr, comp_unit_die);
17755 cu->dies = comp_unit_die;
17756 /* comp_unit_die is not stored in die_hash, no need. */
17758 /* We try not to read any attributes in this function, because not
17759 all CUs needed for references have been loaded yet, and symbol
17760 table processing isn't initialized. But we have to set the CU language,
17761 or we won't be able to build types correctly.
17762 Similarly, if we do not read the producer, we can not apply
17763 producer-specific interpretation. */
17764 prepare_one_comp_unit (cu, cu->dies, language_minimal);
17767 /* Read in a signatured type and build its CU and DIEs.
17768 If the type is a stub for the real type in a DWO file,
17769 read in the real type from the DWO file as well. */
17772 read_signatured_type (struct signatured_type *sig_type)
17774 struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu;
17776 gdb_assert (per_cu->is_debug_types);
17777 gdb_assert (per_cu->cu == NULL);
17779 init_cutu_and_read_dies (per_cu, NULL, 0, 1,
17780 read_signatured_type_reader, NULL);
17783 /* Decode simple location descriptions.
17784 Given a pointer to a dwarf block that defines a location, compute
17785 the location and return the value.
17787 NOTE drow/2003-11-18: This function is called in two situations
17788 now: for the address of static or global variables (partial symbols
17789 only) and for offsets into structures which are expected to be
17790 (more or less) constant. The partial symbol case should go away,
17791 and only the constant case should remain. That will let this
17792 function complain more accurately. A few special modes are allowed
17793 without complaint for global variables (for instance, global
17794 register values and thread-local values).
17796 A location description containing no operations indicates that the
17797 object is optimized out. The return value is 0 for that case.
17798 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17799 callers will only want a very basic result and this can become a
17802 Note that stack[0] is unused except as a default error return. */
17805 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
17807 struct objfile *objfile = cu->objfile;
17809 size_t size = blk->size;
17810 gdb_byte *data = blk->data;
17811 CORE_ADDR stack[64];
17813 unsigned int bytes_read, unsnd;
17819 stack[++stacki] = 0;
17858 stack[++stacki] = op - DW_OP_lit0;
17893 stack[++stacki] = op - DW_OP_reg0;
17895 dwarf2_complex_location_expr_complaint ();
17899 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
17901 stack[++stacki] = unsnd;
17903 dwarf2_complex_location_expr_complaint ();
17907 stack[++stacki] = read_address (objfile->obfd, &data[i],
17912 case DW_OP_const1u:
17913 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
17917 case DW_OP_const1s:
17918 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
17922 case DW_OP_const2u:
17923 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
17927 case DW_OP_const2s:
17928 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
17932 case DW_OP_const4u:
17933 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
17937 case DW_OP_const4s:
17938 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
17942 case DW_OP_const8u:
17943 stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]);
17948 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
17954 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
17959 stack[stacki + 1] = stack[stacki];
17964 stack[stacki - 1] += stack[stacki];
17968 case DW_OP_plus_uconst:
17969 stack[stacki] += read_unsigned_leb128 (NULL, (data + i),
17975 stack[stacki - 1] -= stack[stacki];
17980 /* If we're not the last op, then we definitely can't encode
17981 this using GDB's address_class enum. This is valid for partial
17982 global symbols, although the variable's address will be bogus
17985 dwarf2_complex_location_expr_complaint ();
17988 case DW_OP_GNU_push_tls_address:
17989 /* The top of the stack has the offset from the beginning
17990 of the thread control block at which the variable is located. */
17991 /* Nothing should follow this operator, so the top of stack would
17993 /* This is valid for partial global symbols, but the variable's
17994 address will be bogus in the psymtab. Make it always at least
17995 non-zero to not look as a variable garbage collected by linker
17996 which have DW_OP_addr 0. */
17998 dwarf2_complex_location_expr_complaint ();
18002 case DW_OP_GNU_uninit:
18005 case DW_OP_GNU_addr_index:
18006 case DW_OP_GNU_const_index:
18007 stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i],
18014 const char *name = get_DW_OP_name (op);
18017 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
18020 complaint (&symfile_complaints, _("unsupported stack op: '%02x'"),
18024 return (stack[stacki]);
18027 /* Enforce maximum stack depth of SIZE-1 to avoid writing
18028 outside of the allocated space. Also enforce minimum>0. */
18029 if (stacki >= ARRAY_SIZE (stack) - 1)
18031 complaint (&symfile_complaints,
18032 _("location description stack overflow"));
18038 complaint (&symfile_complaints,
18039 _("location description stack underflow"));
18043 return (stack[stacki]);
18046 /* memory allocation interface */
18048 static struct dwarf_block *
18049 dwarf_alloc_block (struct dwarf2_cu *cu)
18051 struct dwarf_block *blk;
18053 blk = (struct dwarf_block *)
18054 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
18058 static struct die_info *
18059 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
18061 struct die_info *die;
18062 size_t size = sizeof (struct die_info);
18065 size += (num_attrs - 1) * sizeof (struct attribute);
18067 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
18068 memset (die, 0, sizeof (struct die_info));
18073 /* Macro support. */
18075 /* Return file name relative to the compilation directory of file number I in
18076 *LH's file name table. The result is allocated using xmalloc; the caller is
18077 responsible for freeing it. */
18080 file_file_name (int file, struct line_header *lh)
18082 /* Is the file number a valid index into the line header's file name
18083 table? Remember that file numbers start with one, not zero. */
18084 if (1 <= file && file <= lh->num_file_names)
18086 struct file_entry *fe = &lh->file_names[file - 1];
18088 if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0)
18089 return xstrdup (fe->name);
18090 return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING,
18095 /* The compiler produced a bogus file number. We can at least
18096 record the macro definitions made in the file, even if we
18097 won't be able to find the file by name. */
18098 char fake_name[80];
18100 xsnprintf (fake_name, sizeof (fake_name),
18101 "<bad macro file number %d>", file);
18103 complaint (&symfile_complaints,
18104 _("bad file number in macro information (%d)"),
18107 return xstrdup (fake_name);
18111 /* Return the full name of file number I in *LH's file name table.
18112 Use COMP_DIR as the name of the current directory of the
18113 compilation. The result is allocated using xmalloc; the caller is
18114 responsible for freeing it. */
18116 file_full_name (int file, struct line_header *lh, const char *comp_dir)
18118 /* Is the file number a valid index into the line header's file name
18119 table? Remember that file numbers start with one, not zero. */
18120 if (1 <= file && file <= lh->num_file_names)
18122 char *relative = file_file_name (file, lh);
18124 if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL)
18126 return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL);
18129 return file_file_name (file, lh);
18133 static struct macro_source_file *
18134 macro_start_file (int file, int line,
18135 struct macro_source_file *current_file,
18136 const char *comp_dir,
18137 struct line_header *lh, struct objfile *objfile)
18139 /* File name relative to the compilation directory of this source file. */
18140 char *file_name = file_file_name (file, lh);
18142 /* We don't create a macro table for this compilation unit
18143 at all until we actually get a filename. */
18144 if (! pending_macros)
18145 pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack,
18146 objfile->per_bfd->macro_cache,
18149 if (! current_file)
18151 /* If we have no current file, then this must be the start_file
18152 directive for the compilation unit's main source file. */
18153 current_file = macro_set_main (pending_macros, file_name);
18154 macro_define_special (pending_macros);
18157 current_file = macro_include (current_file, line, file_name);
18161 return current_file;
18165 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18166 followed by a null byte. */
18168 copy_string (const char *buf, int len)
18170 char *s = xmalloc (len + 1);
18172 memcpy (s, buf, len);
18178 static const char *
18179 consume_improper_spaces (const char *p, const char *body)
18183 complaint (&symfile_complaints,
18184 _("macro definition contains spaces "
18185 "in formal argument list:\n`%s'"),
18197 parse_macro_definition (struct macro_source_file *file, int line,
18202 /* The body string takes one of two forms. For object-like macro
18203 definitions, it should be:
18205 <macro name> " " <definition>
18207 For function-like macro definitions, it should be:
18209 <macro name> "() " <definition>
18211 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18213 Spaces may appear only where explicitly indicated, and in the
18216 The Dwarf 2 spec says that an object-like macro's name is always
18217 followed by a space, but versions of GCC around March 2002 omit
18218 the space when the macro's definition is the empty string.
18220 The Dwarf 2 spec says that there should be no spaces between the
18221 formal arguments in a function-like macro's formal argument list,
18222 but versions of GCC around March 2002 include spaces after the
18226 /* Find the extent of the macro name. The macro name is terminated
18227 by either a space or null character (for an object-like macro) or
18228 an opening paren (for a function-like macro). */
18229 for (p = body; *p; p++)
18230 if (*p == ' ' || *p == '(')
18233 if (*p == ' ' || *p == '\0')
18235 /* It's an object-like macro. */
18236 int name_len = p - body;
18237 char *name = copy_string (body, name_len);
18238 const char *replacement;
18241 replacement = body + name_len + 1;
18244 dwarf2_macro_malformed_definition_complaint (body);
18245 replacement = body + name_len;
18248 macro_define_object (file, line, name, replacement);
18252 else if (*p == '(')
18254 /* It's a function-like macro. */
18255 char *name = copy_string (body, p - body);
18258 char **argv = xmalloc (argv_size * sizeof (*argv));
18262 p = consume_improper_spaces (p, body);
18264 /* Parse the formal argument list. */
18265 while (*p && *p != ')')
18267 /* Find the extent of the current argument name. */
18268 const char *arg_start = p;
18270 while (*p && *p != ',' && *p != ')' && *p != ' ')
18273 if (! *p || p == arg_start)
18274 dwarf2_macro_malformed_definition_complaint (body);
18277 /* Make sure argv has room for the new argument. */
18278 if (argc >= argv_size)
18281 argv = xrealloc (argv, argv_size * sizeof (*argv));
18284 argv[argc++] = copy_string (arg_start, p - arg_start);
18287 p = consume_improper_spaces (p, body);
18289 /* Consume the comma, if present. */
18294 p = consume_improper_spaces (p, body);
18303 /* Perfectly formed definition, no complaints. */
18304 macro_define_function (file, line, name,
18305 argc, (const char **) argv,
18307 else if (*p == '\0')
18309 /* Complain, but do define it. */
18310 dwarf2_macro_malformed_definition_complaint (body);
18311 macro_define_function (file, line, name,
18312 argc, (const char **) argv,
18316 /* Just complain. */
18317 dwarf2_macro_malformed_definition_complaint (body);
18320 /* Just complain. */
18321 dwarf2_macro_malformed_definition_complaint (body);
18327 for (i = 0; i < argc; i++)
18333 dwarf2_macro_malformed_definition_complaint (body);
18336 /* Skip some bytes from BYTES according to the form given in FORM.
18337 Returns the new pointer. */
18340 skip_form_bytes (bfd *abfd, gdb_byte *bytes, gdb_byte *buffer_end,
18341 enum dwarf_form form,
18342 unsigned int offset_size,
18343 struct dwarf2_section_info *section)
18345 unsigned int bytes_read;
18349 case DW_FORM_data1:
18354 case DW_FORM_data2:
18358 case DW_FORM_data4:
18362 case DW_FORM_data8:
18366 case DW_FORM_string:
18367 read_direct_string (abfd, bytes, &bytes_read);
18368 bytes += bytes_read;
18371 case DW_FORM_sec_offset:
18373 case DW_FORM_GNU_strp_alt:
18374 bytes += offset_size;
18377 case DW_FORM_block:
18378 bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read);
18379 bytes += bytes_read;
18382 case DW_FORM_block1:
18383 bytes += 1 + read_1_byte (abfd, bytes);
18385 case DW_FORM_block2:
18386 bytes += 2 + read_2_bytes (abfd, bytes);
18388 case DW_FORM_block4:
18389 bytes += 4 + read_4_bytes (abfd, bytes);
18392 case DW_FORM_sdata:
18393 case DW_FORM_udata:
18394 case DW_FORM_GNU_addr_index:
18395 case DW_FORM_GNU_str_index:
18396 bytes = (gdb_byte *) gdb_skip_leb128 (bytes, buffer_end);
18399 dwarf2_section_buffer_overflow_complaint (section);
18407 complaint (&symfile_complaints,
18408 _("invalid form 0x%x in `%s'"),
18410 section->asection->name);
18418 /* A helper for dwarf_decode_macros that handles skipping an unknown
18419 opcode. Returns an updated pointer to the macro data buffer; or,
18420 on error, issues a complaint and returns NULL. */
18423 skip_unknown_opcode (unsigned int opcode,
18424 gdb_byte **opcode_definitions,
18425 gdb_byte *mac_ptr, gdb_byte *mac_end,
18427 unsigned int offset_size,
18428 struct dwarf2_section_info *section)
18430 unsigned int bytes_read, i;
18434 if (opcode_definitions[opcode] == NULL)
18436 complaint (&symfile_complaints,
18437 _("unrecognized DW_MACFINO opcode 0x%x"),
18442 defn = opcode_definitions[opcode];
18443 arg = read_unsigned_leb128 (abfd, defn, &bytes_read);
18444 defn += bytes_read;
18446 for (i = 0; i < arg; ++i)
18448 mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size,
18450 if (mac_ptr == NULL)
18452 /* skip_form_bytes already issued the complaint. */
18460 /* A helper function which parses the header of a macro section.
18461 If the macro section is the extended (for now called "GNU") type,
18462 then this updates *OFFSET_SIZE. Returns a pointer to just after
18463 the header, or issues a complaint and returns NULL on error. */
18466 dwarf_parse_macro_header (gdb_byte **opcode_definitions,
18469 unsigned int *offset_size,
18470 int section_is_gnu)
18472 memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *));
18474 if (section_is_gnu)
18476 unsigned int version, flags;
18478 version = read_2_bytes (abfd, mac_ptr);
18481 complaint (&symfile_complaints,
18482 _("unrecognized version `%d' in .debug_macro section"),
18488 flags = read_1_byte (abfd, mac_ptr);
18490 *offset_size = (flags & 1) ? 8 : 4;
18492 if ((flags & 2) != 0)
18493 /* We don't need the line table offset. */
18494 mac_ptr += *offset_size;
18496 /* Vendor opcode descriptions. */
18497 if ((flags & 4) != 0)
18499 unsigned int i, count;
18501 count = read_1_byte (abfd, mac_ptr);
18503 for (i = 0; i < count; ++i)
18505 unsigned int opcode, bytes_read;
18508 opcode = read_1_byte (abfd, mac_ptr);
18510 opcode_definitions[opcode] = mac_ptr;
18511 arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18512 mac_ptr += bytes_read;
18521 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18522 including DW_MACRO_GNU_transparent_include. */
18525 dwarf_decode_macro_bytes (bfd *abfd, gdb_byte *mac_ptr, gdb_byte *mac_end,
18526 struct macro_source_file *current_file,
18527 struct line_header *lh, const char *comp_dir,
18528 struct dwarf2_section_info *section,
18529 int section_is_gnu, int section_is_dwz,
18530 unsigned int offset_size,
18531 struct objfile *objfile,
18532 htab_t include_hash)
18534 enum dwarf_macro_record_type macinfo_type;
18535 int at_commandline;
18536 gdb_byte *opcode_definitions[256];
18538 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
18539 &offset_size, section_is_gnu);
18540 if (mac_ptr == NULL)
18542 /* We already issued a complaint. */
18546 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18547 GDB is still reading the definitions from command line. First
18548 DW_MACINFO_start_file will need to be ignored as it was already executed
18549 to create CURRENT_FILE for the main source holding also the command line
18550 definitions. On first met DW_MACINFO_start_file this flag is reset to
18551 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18553 at_commandline = 1;
18557 /* Do we at least have room for a macinfo type byte? */
18558 if (mac_ptr >= mac_end)
18560 dwarf2_section_buffer_overflow_complaint (section);
18564 macinfo_type = read_1_byte (abfd, mac_ptr);
18567 /* Note that we rely on the fact that the corresponding GNU and
18568 DWARF constants are the same. */
18569 switch (macinfo_type)
18571 /* A zero macinfo type indicates the end of the macro
18576 case DW_MACRO_GNU_define:
18577 case DW_MACRO_GNU_undef:
18578 case DW_MACRO_GNU_define_indirect:
18579 case DW_MACRO_GNU_undef_indirect:
18580 case DW_MACRO_GNU_define_indirect_alt:
18581 case DW_MACRO_GNU_undef_indirect_alt:
18583 unsigned int bytes_read;
18588 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18589 mac_ptr += bytes_read;
18591 if (macinfo_type == DW_MACRO_GNU_define
18592 || macinfo_type == DW_MACRO_GNU_undef)
18594 body = read_direct_string (abfd, mac_ptr, &bytes_read);
18595 mac_ptr += bytes_read;
18599 LONGEST str_offset;
18601 str_offset = read_offset_1 (abfd, mac_ptr, offset_size);
18602 mac_ptr += offset_size;
18604 if (macinfo_type == DW_MACRO_GNU_define_indirect_alt
18605 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt
18608 struct dwz_file *dwz = dwarf2_get_dwz_file ();
18610 body = read_indirect_string_from_dwz (dwz, str_offset);
18613 body = read_indirect_string_at_offset (abfd, str_offset);
18616 is_define = (macinfo_type == DW_MACRO_GNU_define
18617 || macinfo_type == DW_MACRO_GNU_define_indirect
18618 || macinfo_type == DW_MACRO_GNU_define_indirect_alt);
18619 if (! current_file)
18621 /* DWARF violation as no main source is present. */
18622 complaint (&symfile_complaints,
18623 _("debug info with no main source gives macro %s "
18625 is_define ? _("definition") : _("undefinition"),
18629 if ((line == 0 && !at_commandline)
18630 || (line != 0 && at_commandline))
18631 complaint (&symfile_complaints,
18632 _("debug info gives %s macro %s with %s line %d: %s"),
18633 at_commandline ? _("command-line") : _("in-file"),
18634 is_define ? _("definition") : _("undefinition"),
18635 line == 0 ? _("zero") : _("non-zero"), line, body);
18638 parse_macro_definition (current_file, line, body);
18641 gdb_assert (macinfo_type == DW_MACRO_GNU_undef
18642 || macinfo_type == DW_MACRO_GNU_undef_indirect
18643 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt);
18644 macro_undef (current_file, line, body);
18649 case DW_MACRO_GNU_start_file:
18651 unsigned int bytes_read;
18654 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18655 mac_ptr += bytes_read;
18656 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18657 mac_ptr += bytes_read;
18659 if ((line == 0 && !at_commandline)
18660 || (line != 0 && at_commandline))
18661 complaint (&symfile_complaints,
18662 _("debug info gives source %d included "
18663 "from %s at %s line %d"),
18664 file, at_commandline ? _("command-line") : _("file"),
18665 line == 0 ? _("zero") : _("non-zero"), line);
18667 if (at_commandline)
18669 /* This DW_MACRO_GNU_start_file was executed in the
18671 at_commandline = 0;
18674 current_file = macro_start_file (file, line,
18675 current_file, comp_dir,
18680 case DW_MACRO_GNU_end_file:
18681 if (! current_file)
18682 complaint (&symfile_complaints,
18683 _("macro debug info has an unmatched "
18684 "`close_file' directive"));
18687 current_file = current_file->included_by;
18688 if (! current_file)
18690 enum dwarf_macro_record_type next_type;
18692 /* GCC circa March 2002 doesn't produce the zero
18693 type byte marking the end of the compilation
18694 unit. Complain if it's not there, but exit no
18697 /* Do we at least have room for a macinfo type byte? */
18698 if (mac_ptr >= mac_end)
18700 dwarf2_section_buffer_overflow_complaint (section);
18704 /* We don't increment mac_ptr here, so this is just
18706 next_type = read_1_byte (abfd, mac_ptr);
18707 if (next_type != 0)
18708 complaint (&symfile_complaints,
18709 _("no terminating 0-type entry for "
18710 "macros in `.debug_macinfo' section"));
18717 case DW_MACRO_GNU_transparent_include:
18718 case DW_MACRO_GNU_transparent_include_alt:
18722 bfd *include_bfd = abfd;
18723 struct dwarf2_section_info *include_section = section;
18724 struct dwarf2_section_info alt_section;
18725 gdb_byte *include_mac_end = mac_end;
18726 int is_dwz = section_is_dwz;
18727 gdb_byte *new_mac_ptr;
18729 offset = read_offset_1 (abfd, mac_ptr, offset_size);
18730 mac_ptr += offset_size;
18732 if (macinfo_type == DW_MACRO_GNU_transparent_include_alt)
18734 struct dwz_file *dwz = dwarf2_get_dwz_file ();
18736 dwarf2_read_section (dwarf2_per_objfile->objfile,
18739 include_bfd = dwz->macro.asection->owner;
18740 include_section = &dwz->macro;
18741 include_mac_end = dwz->macro.buffer + dwz->macro.size;
18745 new_mac_ptr = include_section->buffer + offset;
18746 slot = htab_find_slot (include_hash, new_mac_ptr, INSERT);
18750 /* This has actually happened; see
18751 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18752 complaint (&symfile_complaints,
18753 _("recursive DW_MACRO_GNU_transparent_include in "
18754 ".debug_macro section"));
18758 *slot = new_mac_ptr;
18760 dwarf_decode_macro_bytes (include_bfd, new_mac_ptr,
18761 include_mac_end, current_file,
18763 section, section_is_gnu, is_dwz,
18764 offset_size, objfile, include_hash);
18766 htab_remove_elt (include_hash, new_mac_ptr);
18771 case DW_MACINFO_vendor_ext:
18772 if (!section_is_gnu)
18774 unsigned int bytes_read;
18777 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18778 mac_ptr += bytes_read;
18779 read_direct_string (abfd, mac_ptr, &bytes_read);
18780 mac_ptr += bytes_read;
18782 /* We don't recognize any vendor extensions. */
18788 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
18789 mac_ptr, mac_end, abfd, offset_size,
18791 if (mac_ptr == NULL)
18795 } while (macinfo_type != 0);
18799 dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset,
18800 const char *comp_dir, int section_is_gnu)
18802 struct objfile *objfile = dwarf2_per_objfile->objfile;
18803 struct line_header *lh = cu->line_header;
18805 gdb_byte *mac_ptr, *mac_end;
18806 struct macro_source_file *current_file = 0;
18807 enum dwarf_macro_record_type macinfo_type;
18808 unsigned int offset_size = cu->header.offset_size;
18809 gdb_byte *opcode_definitions[256];
18810 struct cleanup *cleanup;
18811 htab_t include_hash;
18813 struct dwarf2_section_info *section;
18814 const char *section_name;
18816 if (cu->dwo_unit != NULL)
18818 if (section_is_gnu)
18820 section = &cu->dwo_unit->dwo_file->sections.macro;
18821 section_name = ".debug_macro.dwo";
18825 section = &cu->dwo_unit->dwo_file->sections.macinfo;
18826 section_name = ".debug_macinfo.dwo";
18831 if (section_is_gnu)
18833 section = &dwarf2_per_objfile->macro;
18834 section_name = ".debug_macro";
18838 section = &dwarf2_per_objfile->macinfo;
18839 section_name = ".debug_macinfo";
18843 dwarf2_read_section (objfile, section);
18844 if (section->buffer == NULL)
18846 complaint (&symfile_complaints, _("missing %s section"), section_name);
18849 abfd = section->asection->owner;
18851 /* First pass: Find the name of the base filename.
18852 This filename is needed in order to process all macros whose definition
18853 (or undefinition) comes from the command line. These macros are defined
18854 before the first DW_MACINFO_start_file entry, and yet still need to be
18855 associated to the base file.
18857 To determine the base file name, we scan the macro definitions until we
18858 reach the first DW_MACINFO_start_file entry. We then initialize
18859 CURRENT_FILE accordingly so that any macro definition found before the
18860 first DW_MACINFO_start_file can still be associated to the base file. */
18862 mac_ptr = section->buffer + offset;
18863 mac_end = section->buffer + section->size;
18865 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
18866 &offset_size, section_is_gnu);
18867 if (mac_ptr == NULL)
18869 /* We already issued a complaint. */
18875 /* Do we at least have room for a macinfo type byte? */
18876 if (mac_ptr >= mac_end)
18878 /* Complaint is printed during the second pass as GDB will probably
18879 stop the first pass earlier upon finding
18880 DW_MACINFO_start_file. */
18884 macinfo_type = read_1_byte (abfd, mac_ptr);
18887 /* Note that we rely on the fact that the corresponding GNU and
18888 DWARF constants are the same. */
18889 switch (macinfo_type)
18891 /* A zero macinfo type indicates the end of the macro
18896 case DW_MACRO_GNU_define:
18897 case DW_MACRO_GNU_undef:
18898 /* Only skip the data by MAC_PTR. */
18900 unsigned int bytes_read;
18902 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18903 mac_ptr += bytes_read;
18904 read_direct_string (abfd, mac_ptr, &bytes_read);
18905 mac_ptr += bytes_read;
18909 case DW_MACRO_GNU_start_file:
18911 unsigned int bytes_read;
18914 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18915 mac_ptr += bytes_read;
18916 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18917 mac_ptr += bytes_read;
18919 current_file = macro_start_file (file, line, current_file,
18920 comp_dir, lh, objfile);
18924 case DW_MACRO_GNU_end_file:
18925 /* No data to skip by MAC_PTR. */
18928 case DW_MACRO_GNU_define_indirect:
18929 case DW_MACRO_GNU_undef_indirect:
18930 case DW_MACRO_GNU_define_indirect_alt:
18931 case DW_MACRO_GNU_undef_indirect_alt:
18933 unsigned int bytes_read;
18935 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18936 mac_ptr += bytes_read;
18937 mac_ptr += offset_size;
18941 case DW_MACRO_GNU_transparent_include:
18942 case DW_MACRO_GNU_transparent_include_alt:
18943 /* Note that, according to the spec, a transparent include
18944 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18945 skip this opcode. */
18946 mac_ptr += offset_size;
18949 case DW_MACINFO_vendor_ext:
18950 /* Only skip the data by MAC_PTR. */
18951 if (!section_is_gnu)
18953 unsigned int bytes_read;
18955 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18956 mac_ptr += bytes_read;
18957 read_direct_string (abfd, mac_ptr, &bytes_read);
18958 mac_ptr += bytes_read;
18963 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
18964 mac_ptr, mac_end, abfd, offset_size,
18966 if (mac_ptr == NULL)
18970 } while (macinfo_type != 0 && current_file == NULL);
18972 /* Second pass: Process all entries.
18974 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18975 command-line macro definitions/undefinitions. This flag is unset when we
18976 reach the first DW_MACINFO_start_file entry. */
18978 include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
18979 NULL, xcalloc, xfree);
18980 cleanup = make_cleanup_htab_delete (include_hash);
18981 mac_ptr = section->buffer + offset;
18982 slot = htab_find_slot (include_hash, mac_ptr, INSERT);
18984 dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end,
18985 current_file, lh, comp_dir, section,
18987 offset_size, objfile, include_hash);
18988 do_cleanups (cleanup);
18991 /* Check if the attribute's form is a DW_FORM_block*
18992 if so return true else false. */
18995 attr_form_is_block (struct attribute *attr)
18997 return (attr == NULL ? 0 :
18998 attr->form == DW_FORM_block1
18999 || attr->form == DW_FORM_block2
19000 || attr->form == DW_FORM_block4
19001 || attr->form == DW_FORM_block
19002 || attr->form == DW_FORM_exprloc);
19005 /* Return non-zero if ATTR's value is a section offset --- classes
19006 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
19007 You may use DW_UNSND (attr) to retrieve such offsets.
19009 Section 7.5.4, "Attribute Encodings", explains that no attribute
19010 may have a value that belongs to more than one of these classes; it
19011 would be ambiguous if we did, because we use the same forms for all
19015 attr_form_is_section_offset (struct attribute *attr)
19017 return (attr->form == DW_FORM_data4
19018 || attr->form == DW_FORM_data8
19019 || attr->form == DW_FORM_sec_offset);
19022 /* Return non-zero if ATTR's value falls in the 'constant' class, or
19023 zero otherwise. When this function returns true, you can apply
19024 dwarf2_get_attr_constant_value to it.
19026 However, note that for some attributes you must check
19027 attr_form_is_section_offset before using this test. DW_FORM_data4
19028 and DW_FORM_data8 are members of both the constant class, and of
19029 the classes that contain offsets into other debug sections
19030 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
19031 that, if an attribute's can be either a constant or one of the
19032 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
19033 taken as section offsets, not constants. */
19036 attr_form_is_constant (struct attribute *attr)
19038 switch (attr->form)
19040 case DW_FORM_sdata:
19041 case DW_FORM_udata:
19042 case DW_FORM_data1:
19043 case DW_FORM_data2:
19044 case DW_FORM_data4:
19045 case DW_FORM_data8:
19052 /* Return the .debug_loc section to use for CU.
19053 For DWO files use .debug_loc.dwo. */
19055 static struct dwarf2_section_info *
19056 cu_debug_loc_section (struct dwarf2_cu *cu)
19059 return &cu->dwo_unit->dwo_file->sections.loc;
19060 return &dwarf2_per_objfile->loc;
19063 /* A helper function that fills in a dwarf2_loclist_baton. */
19066 fill_in_loclist_baton (struct dwarf2_cu *cu,
19067 struct dwarf2_loclist_baton *baton,
19068 struct attribute *attr)
19070 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
19072 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
19074 baton->per_cu = cu->per_cu;
19075 gdb_assert (baton->per_cu);
19076 /* We don't know how long the location list is, but make sure we
19077 don't run off the edge of the section. */
19078 baton->size = section->size - DW_UNSND (attr);
19079 baton->data = section->buffer + DW_UNSND (attr);
19080 baton->base_address = cu->base_address;
19081 baton->from_dwo = cu->dwo_unit != NULL;
19085 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
19086 struct dwarf2_cu *cu, int is_block)
19088 struct objfile *objfile = dwarf2_per_objfile->objfile;
19089 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
19091 if (attr_form_is_section_offset (attr)
19092 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
19093 the section. If so, fall through to the complaint in the
19095 && DW_UNSND (attr) < dwarf2_section_size (objfile, section))
19097 struct dwarf2_loclist_baton *baton;
19099 baton = obstack_alloc (&objfile->objfile_obstack,
19100 sizeof (struct dwarf2_loclist_baton));
19102 fill_in_loclist_baton (cu, baton, attr);
19104 if (cu->base_known == 0)
19105 complaint (&symfile_complaints,
19106 _("Location list used without "
19107 "specifying the CU base address."));
19109 SYMBOL_ACLASS_INDEX (sym) = (is_block
19110 ? dwarf2_loclist_block_index
19111 : dwarf2_loclist_index);
19112 SYMBOL_LOCATION_BATON (sym) = baton;
19116 struct dwarf2_locexpr_baton *baton;
19118 baton = obstack_alloc (&objfile->objfile_obstack,
19119 sizeof (struct dwarf2_locexpr_baton));
19120 baton->per_cu = cu->per_cu;
19121 gdb_assert (baton->per_cu);
19123 if (attr_form_is_block (attr))
19125 /* Note that we're just copying the block's data pointer
19126 here, not the actual data. We're still pointing into the
19127 info_buffer for SYM's objfile; right now we never release
19128 that buffer, but when we do clean up properly this may
19130 baton->size = DW_BLOCK (attr)->size;
19131 baton->data = DW_BLOCK (attr)->data;
19135 dwarf2_invalid_attrib_class_complaint ("location description",
19136 SYMBOL_NATURAL_NAME (sym));
19140 SYMBOL_ACLASS_INDEX (sym) = (is_block
19141 ? dwarf2_locexpr_block_index
19142 : dwarf2_locexpr_index);
19143 SYMBOL_LOCATION_BATON (sym) = baton;
19147 /* Return the OBJFILE associated with the compilation unit CU. If CU
19148 came from a separate debuginfo file, then the master objfile is
19152 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
19154 struct objfile *objfile = per_cu->objfile;
19156 /* Return the master objfile, so that we can report and look up the
19157 correct file containing this variable. */
19158 if (objfile->separate_debug_objfile_backlink)
19159 objfile = objfile->separate_debug_objfile_backlink;
19164 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
19165 (CU_HEADERP is unused in such case) or prepare a temporary copy at
19166 CU_HEADERP first. */
19168 static const struct comp_unit_head *
19169 per_cu_header_read_in (struct comp_unit_head *cu_headerp,
19170 struct dwarf2_per_cu_data *per_cu)
19172 gdb_byte *info_ptr;
19175 return &per_cu->cu->header;
19177 info_ptr = per_cu->section->buffer + per_cu->offset.sect_off;
19179 memset (cu_headerp, 0, sizeof (*cu_headerp));
19180 read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd);
19185 /* Return the address size given in the compilation unit header for CU. */
19188 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
19190 struct comp_unit_head cu_header_local;
19191 const struct comp_unit_head *cu_headerp;
19193 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
19195 return cu_headerp->addr_size;
19198 /* Return the offset size given in the compilation unit header for CU. */
19201 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
19203 struct comp_unit_head cu_header_local;
19204 const struct comp_unit_head *cu_headerp;
19206 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
19208 return cu_headerp->offset_size;
19211 /* See its dwarf2loc.h declaration. */
19214 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu)
19216 struct comp_unit_head cu_header_local;
19217 const struct comp_unit_head *cu_headerp;
19219 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
19221 if (cu_headerp->version == 2)
19222 return cu_headerp->addr_size;
19224 return cu_headerp->offset_size;
19227 /* Return the text offset of the CU. The returned offset comes from
19228 this CU's objfile. If this objfile came from a separate debuginfo
19229 file, then the offset may be different from the corresponding
19230 offset in the parent objfile. */
19233 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
19235 struct objfile *objfile = per_cu->objfile;
19237 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
19240 /* Locate the .debug_info compilation unit from CU's objfile which contains
19241 the DIE at OFFSET. Raises an error on failure. */
19243 static struct dwarf2_per_cu_data *
19244 dwarf2_find_containing_comp_unit (sect_offset offset,
19245 unsigned int offset_in_dwz,
19246 struct objfile *objfile)
19248 struct dwarf2_per_cu_data *this_cu;
19250 const sect_offset *cu_off;
19253 high = dwarf2_per_objfile->n_comp_units - 1;
19256 struct dwarf2_per_cu_data *mid_cu;
19257 int mid = low + (high - low) / 2;
19259 mid_cu = dwarf2_per_objfile->all_comp_units[mid];
19260 cu_off = &mid_cu->offset;
19261 if (mid_cu->is_dwz > offset_in_dwz
19262 || (mid_cu->is_dwz == offset_in_dwz
19263 && cu_off->sect_off >= offset.sect_off))
19268 gdb_assert (low == high);
19269 this_cu = dwarf2_per_objfile->all_comp_units[low];
19270 cu_off = &this_cu->offset;
19271 if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off)
19273 if (low == 0 || this_cu->is_dwz != offset_in_dwz)
19274 error (_("Dwarf Error: could not find partial DIE containing "
19275 "offset 0x%lx [in module %s]"),
19276 (long) offset.sect_off, bfd_get_filename (objfile->obfd));
19278 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off
19279 <= offset.sect_off);
19280 return dwarf2_per_objfile->all_comp_units[low-1];
19284 this_cu = dwarf2_per_objfile->all_comp_units[low];
19285 if (low == dwarf2_per_objfile->n_comp_units - 1
19286 && offset.sect_off >= this_cu->offset.sect_off + this_cu->length)
19287 error (_("invalid dwarf2 offset %u"), offset.sect_off);
19288 gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length);
19293 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19296 init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu)
19298 memset (cu, 0, sizeof (*cu));
19300 cu->per_cu = per_cu;
19301 cu->objfile = per_cu->objfile;
19302 obstack_init (&cu->comp_unit_obstack);
19305 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19308 prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die,
19309 enum language pretend_language)
19311 struct attribute *attr;
19313 /* Set the language we're debugging. */
19314 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
19316 set_cu_language (DW_UNSND (attr), cu);
19319 cu->language = pretend_language;
19320 cu->language_defn = language_def (cu->language);
19323 attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu);
19325 cu->producer = DW_STRING (attr);
19328 /* Release one cached compilation unit, CU. We unlink it from the tree
19329 of compilation units, but we don't remove it from the read_in_chain;
19330 the caller is responsible for that.
19331 NOTE: DATA is a void * because this function is also used as a
19332 cleanup routine. */
19335 free_heap_comp_unit (void *data)
19337 struct dwarf2_cu *cu = data;
19339 gdb_assert (cu->per_cu != NULL);
19340 cu->per_cu->cu = NULL;
19343 obstack_free (&cu->comp_unit_obstack, NULL);
19348 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19349 when we're finished with it. We can't free the pointer itself, but be
19350 sure to unlink it from the cache. Also release any associated storage. */
19353 free_stack_comp_unit (void *data)
19355 struct dwarf2_cu *cu = data;
19357 gdb_assert (cu->per_cu != NULL);
19358 cu->per_cu->cu = NULL;
19361 obstack_free (&cu->comp_unit_obstack, NULL);
19362 cu->partial_dies = NULL;
19365 /* Free all cached compilation units. */
19368 free_cached_comp_units (void *data)
19370 struct dwarf2_per_cu_data *per_cu, **last_chain;
19372 per_cu = dwarf2_per_objfile->read_in_chain;
19373 last_chain = &dwarf2_per_objfile->read_in_chain;
19374 while (per_cu != NULL)
19376 struct dwarf2_per_cu_data *next_cu;
19378 next_cu = per_cu->cu->read_in_chain;
19380 free_heap_comp_unit (per_cu->cu);
19381 *last_chain = next_cu;
19387 /* Increase the age counter on each cached compilation unit, and free
19388 any that are too old. */
19391 age_cached_comp_units (void)
19393 struct dwarf2_per_cu_data *per_cu, **last_chain;
19395 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
19396 per_cu = dwarf2_per_objfile->read_in_chain;
19397 while (per_cu != NULL)
19399 per_cu->cu->last_used ++;
19400 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
19401 dwarf2_mark (per_cu->cu);
19402 per_cu = per_cu->cu->read_in_chain;
19405 per_cu = dwarf2_per_objfile->read_in_chain;
19406 last_chain = &dwarf2_per_objfile->read_in_chain;
19407 while (per_cu != NULL)
19409 struct dwarf2_per_cu_data *next_cu;
19411 next_cu = per_cu->cu->read_in_chain;
19413 if (!per_cu->cu->mark)
19415 free_heap_comp_unit (per_cu->cu);
19416 *last_chain = next_cu;
19419 last_chain = &per_cu->cu->read_in_chain;
19425 /* Remove a single compilation unit from the cache. */
19428 free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu)
19430 struct dwarf2_per_cu_data *per_cu, **last_chain;
19432 per_cu = dwarf2_per_objfile->read_in_chain;
19433 last_chain = &dwarf2_per_objfile->read_in_chain;
19434 while (per_cu != NULL)
19436 struct dwarf2_per_cu_data *next_cu;
19438 next_cu = per_cu->cu->read_in_chain;
19440 if (per_cu == target_per_cu)
19442 free_heap_comp_unit (per_cu->cu);
19444 *last_chain = next_cu;
19448 last_chain = &per_cu->cu->read_in_chain;
19454 /* Release all extra memory associated with OBJFILE. */
19457 dwarf2_free_objfile (struct objfile *objfile)
19459 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
19461 if (dwarf2_per_objfile == NULL)
19464 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19465 free_cached_comp_units (NULL);
19467 if (dwarf2_per_objfile->quick_file_names_table)
19468 htab_delete (dwarf2_per_objfile->quick_file_names_table);
19470 /* Everything else should be on the objfile obstack. */
19473 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19474 We store these in a hash table separate from the DIEs, and preserve them
19475 when the DIEs are flushed out of cache.
19477 The CU "per_cu" pointer is needed because offset alone is not enough to
19478 uniquely identify the type. A file may have multiple .debug_types sections,
19479 or the type may come from a DWO file. We have to use something in
19480 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19481 routine, get_die_type_at_offset, from outside this file, and thus won't
19482 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19485 struct dwarf2_per_cu_offset_and_type
19487 const struct dwarf2_per_cu_data *per_cu;
19488 sect_offset offset;
19492 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19495 per_cu_offset_and_type_hash (const void *item)
19497 const struct dwarf2_per_cu_offset_and_type *ofs = item;
19499 return (uintptr_t) ofs->per_cu + ofs->offset.sect_off;
19502 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19505 per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs)
19507 const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs;
19508 const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs;
19510 return (ofs_lhs->per_cu == ofs_rhs->per_cu
19511 && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off);
19514 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19515 table if necessary. For convenience, return TYPE.
19517 The DIEs reading must have careful ordering to:
19518 * Not cause infite loops trying to read in DIEs as a prerequisite for
19519 reading current DIE.
19520 * Not trying to dereference contents of still incompletely read in types
19521 while reading in other DIEs.
19522 * Enable referencing still incompletely read in types just by a pointer to
19523 the type without accessing its fields.
19525 Therefore caller should follow these rules:
19526 * Try to fetch any prerequisite types we may need to build this DIE type
19527 before building the type and calling set_die_type.
19528 * After building type call set_die_type for current DIE as soon as
19529 possible before fetching more types to complete the current type.
19530 * Make the type as complete as possible before fetching more types. */
19532 static struct type *
19533 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
19535 struct dwarf2_per_cu_offset_and_type **slot, ofs;
19536 struct objfile *objfile = cu->objfile;
19538 /* For Ada types, make sure that the gnat-specific data is always
19539 initialized (if not already set). There are a few types where
19540 we should not be doing so, because the type-specific area is
19541 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19542 where the type-specific area is used to store the floatformat).
19543 But this is not a problem, because the gnat-specific information
19544 is actually not needed for these types. */
19545 if (need_gnat_info (cu)
19546 && TYPE_CODE (type) != TYPE_CODE_FUNC
19547 && TYPE_CODE (type) != TYPE_CODE_FLT
19548 && !HAVE_GNAT_AUX_INFO (type))
19549 INIT_GNAT_SPECIFIC (type);
19551 if (dwarf2_per_objfile->die_type_hash == NULL)
19553 dwarf2_per_objfile->die_type_hash =
19554 htab_create_alloc_ex (127,
19555 per_cu_offset_and_type_hash,
19556 per_cu_offset_and_type_eq,
19558 &objfile->objfile_obstack,
19559 hashtab_obstack_allocate,
19560 dummy_obstack_deallocate);
19563 ofs.per_cu = cu->per_cu;
19564 ofs.offset = die->offset;
19566 slot = (struct dwarf2_per_cu_offset_and_type **)
19567 htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT);
19569 complaint (&symfile_complaints,
19570 _("A problem internal to GDB: DIE 0x%x has type already set"),
19571 die->offset.sect_off);
19572 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
19577 /* Look up the type for the die at OFFSET in the appropriate type_hash
19578 table, or return NULL if the die does not have a saved type. */
19580 static struct type *
19581 get_die_type_at_offset (sect_offset offset,
19582 struct dwarf2_per_cu_data *per_cu)
19584 struct dwarf2_per_cu_offset_and_type *slot, ofs;
19586 if (dwarf2_per_objfile->die_type_hash == NULL)
19589 ofs.per_cu = per_cu;
19590 ofs.offset = offset;
19591 slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs);
19598 /* Look up the type for DIE in the appropriate type_hash table,
19599 or return NULL if DIE does not have a saved type. */
19601 static struct type *
19602 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
19604 return get_die_type_at_offset (die->offset, cu->per_cu);
19607 /* Add a dependence relationship from CU to REF_PER_CU. */
19610 dwarf2_add_dependence (struct dwarf2_cu *cu,
19611 struct dwarf2_per_cu_data *ref_per_cu)
19615 if (cu->dependencies == NULL)
19617 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
19618 NULL, &cu->comp_unit_obstack,
19619 hashtab_obstack_allocate,
19620 dummy_obstack_deallocate);
19622 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
19624 *slot = ref_per_cu;
19627 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19628 Set the mark field in every compilation unit in the
19629 cache that we must keep because we are keeping CU. */
19632 dwarf2_mark_helper (void **slot, void *data)
19634 struct dwarf2_per_cu_data *per_cu;
19636 per_cu = (struct dwarf2_per_cu_data *) *slot;
19638 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19639 reading of the chain. As such dependencies remain valid it is not much
19640 useful to track and undo them during QUIT cleanups. */
19641 if (per_cu->cu == NULL)
19644 if (per_cu->cu->mark)
19646 per_cu->cu->mark = 1;
19648 if (per_cu->cu->dependencies != NULL)
19649 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
19654 /* Set the mark field in CU and in every other compilation unit in the
19655 cache that we must keep because we are keeping CU. */
19658 dwarf2_mark (struct dwarf2_cu *cu)
19663 if (cu->dependencies != NULL)
19664 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
19668 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
19672 per_cu->cu->mark = 0;
19673 per_cu = per_cu->cu->read_in_chain;
19677 /* Trivial hash function for partial_die_info: the hash value of a DIE
19678 is its offset in .debug_info for this objfile. */
19681 partial_die_hash (const void *item)
19683 const struct partial_die_info *part_die = item;
19685 return part_die->offset.sect_off;
19688 /* Trivial comparison function for partial_die_info structures: two DIEs
19689 are equal if they have the same offset. */
19692 partial_die_eq (const void *item_lhs, const void *item_rhs)
19694 const struct partial_die_info *part_die_lhs = item_lhs;
19695 const struct partial_die_info *part_die_rhs = item_rhs;
19697 return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off;
19700 static struct cmd_list_element *set_dwarf2_cmdlist;
19701 static struct cmd_list_element *show_dwarf2_cmdlist;
19704 set_dwarf2_cmd (char *args, int from_tty)
19706 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
19710 show_dwarf2_cmd (char *args, int from_tty)
19712 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
19715 /* Free data associated with OBJFILE, if necessary. */
19718 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
19720 struct dwarf2_per_objfile *data = d;
19723 for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix)
19724 VEC_free (dwarf2_per_cu_ptr,
19725 dwarf2_per_objfile->all_comp_units[ix]->imported_symtabs);
19727 for (ix = 0; ix < dwarf2_per_objfile->n_type_units; ++ix)
19728 VEC_free (dwarf2_per_cu_ptr,
19729 dwarf2_per_objfile->all_type_units[ix]->per_cu.imported_symtabs);
19731 VEC_free (dwarf2_section_info_def, data->types);
19733 if (data->dwo_files)
19734 free_dwo_files (data->dwo_files, objfile);
19736 if (data->dwz_file && data->dwz_file->dwz_bfd)
19737 gdb_bfd_unref (data->dwz_file->dwz_bfd);
19741 /* The "save gdb-index" command. */
19743 /* The contents of the hash table we create when building the string
19745 struct strtab_entry
19747 offset_type offset;
19751 /* Hash function for a strtab_entry.
19753 Function is used only during write_hash_table so no index format backward
19754 compatibility is needed. */
19757 hash_strtab_entry (const void *e)
19759 const struct strtab_entry *entry = e;
19760 return mapped_index_string_hash (INT_MAX, entry->str);
19763 /* Equality function for a strtab_entry. */
19766 eq_strtab_entry (const void *a, const void *b)
19768 const struct strtab_entry *ea = a;
19769 const struct strtab_entry *eb = b;
19770 return !strcmp (ea->str, eb->str);
19773 /* Create a strtab_entry hash table. */
19776 create_strtab (void)
19778 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
19779 xfree, xcalloc, xfree);
19782 /* Add a string to the constant pool. Return the string's offset in
19786 add_string (htab_t table, struct obstack *cpool, const char *str)
19789 struct strtab_entry entry;
19790 struct strtab_entry *result;
19793 slot = htab_find_slot (table, &entry, INSERT);
19798 result = XNEW (struct strtab_entry);
19799 result->offset = obstack_object_size (cpool);
19801 obstack_grow_str0 (cpool, str);
19804 return result->offset;
19807 /* An entry in the symbol table. */
19808 struct symtab_index_entry
19810 /* The name of the symbol. */
19812 /* The offset of the name in the constant pool. */
19813 offset_type index_offset;
19814 /* A sorted vector of the indices of all the CUs that hold an object
19816 VEC (offset_type) *cu_indices;
19819 /* The symbol table. This is a power-of-2-sized hash table. */
19820 struct mapped_symtab
19822 offset_type n_elements;
19824 struct symtab_index_entry **data;
19827 /* Hash function for a symtab_index_entry. */
19830 hash_symtab_entry (const void *e)
19832 const struct symtab_index_entry *entry = e;
19833 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
19834 sizeof (offset_type) * VEC_length (offset_type,
19835 entry->cu_indices),
19839 /* Equality function for a symtab_index_entry. */
19842 eq_symtab_entry (const void *a, const void *b)
19844 const struct symtab_index_entry *ea = a;
19845 const struct symtab_index_entry *eb = b;
19846 int len = VEC_length (offset_type, ea->cu_indices);
19847 if (len != VEC_length (offset_type, eb->cu_indices))
19849 return !memcmp (VEC_address (offset_type, ea->cu_indices),
19850 VEC_address (offset_type, eb->cu_indices),
19851 sizeof (offset_type) * len);
19854 /* Destroy a symtab_index_entry. */
19857 delete_symtab_entry (void *p)
19859 struct symtab_index_entry *entry = p;
19860 VEC_free (offset_type, entry->cu_indices);
19864 /* Create a hash table holding symtab_index_entry objects. */
19867 create_symbol_hash_table (void)
19869 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
19870 delete_symtab_entry, xcalloc, xfree);
19873 /* Create a new mapped symtab object. */
19875 static struct mapped_symtab *
19876 create_mapped_symtab (void)
19878 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
19879 symtab->n_elements = 0;
19880 symtab->size = 1024;
19881 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
19885 /* Destroy a mapped_symtab. */
19888 cleanup_mapped_symtab (void *p)
19890 struct mapped_symtab *symtab = p;
19891 /* The contents of the array are freed when the other hash table is
19893 xfree (symtab->data);
19897 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19900 Function is used only during write_hash_table so no index format backward
19901 compatibility is needed. */
19903 static struct symtab_index_entry **
19904 find_slot (struct mapped_symtab *symtab, const char *name)
19906 offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name);
19908 index = hash & (symtab->size - 1);
19909 step = ((hash * 17) & (symtab->size - 1)) | 1;
19913 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
19914 return &symtab->data[index];
19915 index = (index + step) & (symtab->size - 1);
19919 /* Expand SYMTAB's hash table. */
19922 hash_expand (struct mapped_symtab *symtab)
19924 offset_type old_size = symtab->size;
19926 struct symtab_index_entry **old_entries = symtab->data;
19929 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
19931 for (i = 0; i < old_size; ++i)
19933 if (old_entries[i])
19935 struct symtab_index_entry **slot = find_slot (symtab,
19936 old_entries[i]->name);
19937 *slot = old_entries[i];
19941 xfree (old_entries);
19944 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19945 CU_INDEX is the index of the CU in which the symbol appears.
19946 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19949 add_index_entry (struct mapped_symtab *symtab, const char *name,
19950 int is_static, gdb_index_symbol_kind kind,
19951 offset_type cu_index)
19953 struct symtab_index_entry **slot;
19954 offset_type cu_index_and_attrs;
19956 ++symtab->n_elements;
19957 if (4 * symtab->n_elements / 3 >= symtab->size)
19958 hash_expand (symtab);
19960 slot = find_slot (symtab, name);
19963 *slot = XNEW (struct symtab_index_entry);
19964 (*slot)->name = name;
19965 /* index_offset is set later. */
19966 (*slot)->cu_indices = NULL;
19969 cu_index_and_attrs = 0;
19970 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index);
19971 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static);
19972 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind);
19974 /* We don't want to record an index value twice as we want to avoid the
19976 We process all global symbols and then all static symbols
19977 (which would allow us to avoid the duplication by only having to check
19978 the last entry pushed), but a symbol could have multiple kinds in one CU.
19979 To keep things simple we don't worry about the duplication here and
19980 sort and uniqufy the list after we've processed all symbols. */
19981 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs);
19984 /* qsort helper routine for uniquify_cu_indices. */
19987 offset_type_compare (const void *ap, const void *bp)
19989 offset_type a = *(offset_type *) ap;
19990 offset_type b = *(offset_type *) bp;
19992 return (a > b) - (b > a);
19995 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19998 uniquify_cu_indices (struct mapped_symtab *symtab)
20002 for (i = 0; i < symtab->size; ++i)
20004 struct symtab_index_entry *entry = symtab->data[i];
20007 && entry->cu_indices != NULL)
20009 unsigned int next_to_insert, next_to_check;
20010 offset_type last_value;
20012 qsort (VEC_address (offset_type, entry->cu_indices),
20013 VEC_length (offset_type, entry->cu_indices),
20014 sizeof (offset_type), offset_type_compare);
20016 last_value = VEC_index (offset_type, entry->cu_indices, 0);
20017 next_to_insert = 1;
20018 for (next_to_check = 1;
20019 next_to_check < VEC_length (offset_type, entry->cu_indices);
20022 if (VEC_index (offset_type, entry->cu_indices, next_to_check)
20025 last_value = VEC_index (offset_type, entry->cu_indices,
20027 VEC_replace (offset_type, entry->cu_indices, next_to_insert,
20032 VEC_truncate (offset_type, entry->cu_indices, next_to_insert);
20037 /* Add a vector of indices to the constant pool. */
20040 add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool,
20041 struct symtab_index_entry *entry)
20045 slot = htab_find_slot (symbol_hash_table, entry, INSERT);
20048 offset_type len = VEC_length (offset_type, entry->cu_indices);
20049 offset_type val = MAYBE_SWAP (len);
20054 entry->index_offset = obstack_object_size (cpool);
20056 obstack_grow (cpool, &val, sizeof (val));
20058 VEC_iterate (offset_type, entry->cu_indices, i, iter);
20061 val = MAYBE_SWAP (iter);
20062 obstack_grow (cpool, &val, sizeof (val));
20067 struct symtab_index_entry *old_entry = *slot;
20068 entry->index_offset = old_entry->index_offset;
20071 return entry->index_offset;
20074 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
20075 constant pool entries going into the obstack CPOOL. */
20078 write_hash_table (struct mapped_symtab *symtab,
20079 struct obstack *output, struct obstack *cpool)
20082 htab_t symbol_hash_table;
20085 symbol_hash_table = create_symbol_hash_table ();
20086 str_table = create_strtab ();
20088 /* We add all the index vectors to the constant pool first, to
20089 ensure alignment is ok. */
20090 for (i = 0; i < symtab->size; ++i)
20092 if (symtab->data[i])
20093 add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]);
20096 /* Now write out the hash table. */
20097 for (i = 0; i < symtab->size; ++i)
20099 offset_type str_off, vec_off;
20101 if (symtab->data[i])
20103 str_off = add_string (str_table, cpool, symtab->data[i]->name);
20104 vec_off = symtab->data[i]->index_offset;
20108 /* While 0 is a valid constant pool index, it is not valid
20109 to have 0 for both offsets. */
20114 str_off = MAYBE_SWAP (str_off);
20115 vec_off = MAYBE_SWAP (vec_off);
20117 obstack_grow (output, &str_off, sizeof (str_off));
20118 obstack_grow (output, &vec_off, sizeof (vec_off));
20121 htab_delete (str_table);
20122 htab_delete (symbol_hash_table);
20125 /* Struct to map psymtab to CU index in the index file. */
20126 struct psymtab_cu_index_map
20128 struct partial_symtab *psymtab;
20129 unsigned int cu_index;
20133 hash_psymtab_cu_index (const void *item)
20135 const struct psymtab_cu_index_map *map = item;
20137 return htab_hash_pointer (map->psymtab);
20141 eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs)
20143 const struct psymtab_cu_index_map *lhs = item_lhs;
20144 const struct psymtab_cu_index_map *rhs = item_rhs;
20146 return lhs->psymtab == rhs->psymtab;
20149 /* Helper struct for building the address table. */
20150 struct addrmap_index_data
20152 struct objfile *objfile;
20153 struct obstack *addr_obstack;
20154 htab_t cu_index_htab;
20156 /* Non-zero if the previous_* fields are valid.
20157 We can't write an entry until we see the next entry (since it is only then
20158 that we know the end of the entry). */
20159 int previous_valid;
20160 /* Index of the CU in the table of all CUs in the index file. */
20161 unsigned int previous_cu_index;
20162 /* Start address of the CU. */
20163 CORE_ADDR previous_cu_start;
20166 /* Write an address entry to OBSTACK. */
20169 add_address_entry (struct objfile *objfile, struct obstack *obstack,
20170 CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
20172 offset_type cu_index_to_write;
20174 CORE_ADDR baseaddr;
20176 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
20178 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr);
20179 obstack_grow (obstack, addr, 8);
20180 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr);
20181 obstack_grow (obstack, addr, 8);
20182 cu_index_to_write = MAYBE_SWAP (cu_index);
20183 obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type));
20186 /* Worker function for traversing an addrmap to build the address table. */
20189 add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj)
20191 struct addrmap_index_data *data = datap;
20192 struct partial_symtab *pst = obj;
20194 if (data->previous_valid)
20195 add_address_entry (data->objfile, data->addr_obstack,
20196 data->previous_cu_start, start_addr,
20197 data->previous_cu_index);
20199 data->previous_cu_start = start_addr;
20202 struct psymtab_cu_index_map find_map, *map;
20203 find_map.psymtab = pst;
20204 map = htab_find (data->cu_index_htab, &find_map);
20205 gdb_assert (map != NULL);
20206 data->previous_cu_index = map->cu_index;
20207 data->previous_valid = 1;
20210 data->previous_valid = 0;
20215 /* Write OBJFILE's address map to OBSTACK.
20216 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20217 in the index file. */
20220 write_address_map (struct objfile *objfile, struct obstack *obstack,
20221 htab_t cu_index_htab)
20223 struct addrmap_index_data addrmap_index_data;
20225 /* When writing the address table, we have to cope with the fact that
20226 the addrmap iterator only provides the start of a region; we have to
20227 wait until the next invocation to get the start of the next region. */
20229 addrmap_index_data.objfile = objfile;
20230 addrmap_index_data.addr_obstack = obstack;
20231 addrmap_index_data.cu_index_htab = cu_index_htab;
20232 addrmap_index_data.previous_valid = 0;
20234 addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker,
20235 &addrmap_index_data);
20237 /* It's highly unlikely the last entry (end address = 0xff...ff)
20238 is valid, but we should still handle it.
20239 The end address is recorded as the start of the next region, but that
20240 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20242 if (addrmap_index_data.previous_valid)
20243 add_address_entry (objfile, obstack,
20244 addrmap_index_data.previous_cu_start, (CORE_ADDR) -1,
20245 addrmap_index_data.previous_cu_index);
20248 /* Return the symbol kind of PSYM. */
20250 static gdb_index_symbol_kind
20251 symbol_kind (struct partial_symbol *psym)
20253 domain_enum domain = PSYMBOL_DOMAIN (psym);
20254 enum address_class aclass = PSYMBOL_CLASS (psym);
20262 return GDB_INDEX_SYMBOL_KIND_FUNCTION;
20264 return GDB_INDEX_SYMBOL_KIND_TYPE;
20266 case LOC_CONST_BYTES:
20267 case LOC_OPTIMIZED_OUT:
20269 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
20271 /* Note: It's currently impossible to recognize psyms as enum values
20272 short of reading the type info. For now punt. */
20273 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
20275 /* There are other LOC_FOO values that one might want to classify
20276 as variables, but dwarf2read.c doesn't currently use them. */
20277 return GDB_INDEX_SYMBOL_KIND_OTHER;
20279 case STRUCT_DOMAIN:
20280 return GDB_INDEX_SYMBOL_KIND_TYPE;
20282 return GDB_INDEX_SYMBOL_KIND_OTHER;
20286 /* Add a list of partial symbols to SYMTAB. */
20289 write_psymbols (struct mapped_symtab *symtab,
20291 struct partial_symbol **psymp,
20293 offset_type cu_index,
20296 for (; count-- > 0; ++psymp)
20298 struct partial_symbol *psym = *psymp;
20301 if (SYMBOL_LANGUAGE (psym) == language_ada)
20302 error (_("Ada is not currently supported by the index"));
20304 /* Only add a given psymbol once. */
20305 slot = htab_find_slot (psyms_seen, psym, INSERT);
20308 gdb_index_symbol_kind kind = symbol_kind (psym);
20311 add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym),
20312 is_static, kind, cu_index);
20317 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20318 exception if there is an error. */
20321 write_obstack (FILE *file, struct obstack *obstack)
20323 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
20325 != obstack_object_size (obstack))
20326 error (_("couldn't data write to file"));
20329 /* Unlink a file if the argument is not NULL. */
20332 unlink_if_set (void *p)
20334 char **filename = p;
20336 unlink (*filename);
20339 /* A helper struct used when iterating over debug_types. */
20340 struct signatured_type_index_data
20342 struct objfile *objfile;
20343 struct mapped_symtab *symtab;
20344 struct obstack *types_list;
20349 /* A helper function that writes a single signatured_type to an
20353 write_one_signatured_type (void **slot, void *d)
20355 struct signatured_type_index_data *info = d;
20356 struct signatured_type *entry = (struct signatured_type *) *slot;
20357 struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
20358 struct partial_symtab *psymtab = per_cu->v.psymtab;
20361 write_psymbols (info->symtab,
20363 info->objfile->global_psymbols.list
20364 + psymtab->globals_offset,
20365 psymtab->n_global_syms, info->cu_index,
20367 write_psymbols (info->symtab,
20369 info->objfile->static_psymbols.list
20370 + psymtab->statics_offset,
20371 psymtab->n_static_syms, info->cu_index,
20374 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
20375 entry->per_cu.offset.sect_off);
20376 obstack_grow (info->types_list, val, 8);
20377 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
20378 entry->type_offset_in_tu.cu_off);
20379 obstack_grow (info->types_list, val, 8);
20380 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
20381 obstack_grow (info->types_list, val, 8);
20388 /* Recurse into all "included" dependencies and write their symbols as
20389 if they appeared in this psymtab. */
20392 recursively_write_psymbols (struct objfile *objfile,
20393 struct partial_symtab *psymtab,
20394 struct mapped_symtab *symtab,
20396 offset_type cu_index)
20400 for (i = 0; i < psymtab->number_of_dependencies; ++i)
20401 if (psymtab->dependencies[i]->user != NULL)
20402 recursively_write_psymbols (objfile, psymtab->dependencies[i],
20403 symtab, psyms_seen, cu_index);
20405 write_psymbols (symtab,
20407 objfile->global_psymbols.list + psymtab->globals_offset,
20408 psymtab->n_global_syms, cu_index,
20410 write_psymbols (symtab,
20412 objfile->static_psymbols.list + psymtab->statics_offset,
20413 psymtab->n_static_syms, cu_index,
20417 /* Create an index file for OBJFILE in the directory DIR. */
20420 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
20422 struct cleanup *cleanup;
20423 char *filename, *cleanup_filename;
20424 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
20425 struct obstack cu_list, types_cu_list;
20428 struct mapped_symtab *symtab;
20429 offset_type val, size_of_contents, total_len;
20432 htab_t cu_index_htab;
20433 struct psymtab_cu_index_map *psymtab_cu_index_map;
20435 if (!objfile->psymtabs || !objfile->psymtabs_addrmap)
20438 if (dwarf2_per_objfile->using_index)
20439 error (_("Cannot use an index to create the index"));
20441 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1)
20442 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20444 if (stat (objfile->name, &st) < 0)
20445 perror_with_name (objfile->name);
20447 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
20448 INDEX_SUFFIX, (char *) NULL);
20449 cleanup = make_cleanup (xfree, filename);
20451 out_file = fopen (filename, "wb");
20453 error (_("Can't open `%s' for writing"), filename);
20455 cleanup_filename = filename;
20456 make_cleanup (unlink_if_set, &cleanup_filename);
20458 symtab = create_mapped_symtab ();
20459 make_cleanup (cleanup_mapped_symtab, symtab);
20461 obstack_init (&addr_obstack);
20462 make_cleanup_obstack_free (&addr_obstack);
20464 obstack_init (&cu_list);
20465 make_cleanup_obstack_free (&cu_list);
20467 obstack_init (&types_cu_list);
20468 make_cleanup_obstack_free (&types_cu_list);
20470 psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer,
20471 NULL, xcalloc, xfree);
20472 make_cleanup_htab_delete (psyms_seen);
20474 /* While we're scanning CU's create a table that maps a psymtab pointer
20475 (which is what addrmap records) to its index (which is what is recorded
20476 in the index file). This will later be needed to write the address
20478 cu_index_htab = htab_create_alloc (100,
20479 hash_psymtab_cu_index,
20480 eq_psymtab_cu_index,
20481 NULL, xcalloc, xfree);
20482 make_cleanup_htab_delete (cu_index_htab);
20483 psymtab_cu_index_map = (struct psymtab_cu_index_map *)
20484 xmalloc (sizeof (struct psymtab_cu_index_map)
20485 * dwarf2_per_objfile->n_comp_units);
20486 make_cleanup (xfree, psymtab_cu_index_map);
20488 /* The CU list is already sorted, so we don't need to do additional
20489 work here. Also, the debug_types entries do not appear in
20490 all_comp_units, but only in their own hash table. */
20491 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
20493 struct dwarf2_per_cu_data *per_cu
20494 = dwarf2_per_objfile->all_comp_units[i];
20495 struct partial_symtab *psymtab = per_cu->v.psymtab;
20497 struct psymtab_cu_index_map *map;
20500 if (psymtab->user == NULL)
20501 recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i);
20503 map = &psymtab_cu_index_map[i];
20504 map->psymtab = psymtab;
20506 slot = htab_find_slot (cu_index_htab, map, INSERT);
20507 gdb_assert (slot != NULL);
20508 gdb_assert (*slot == NULL);
20511 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
20512 per_cu->offset.sect_off);
20513 obstack_grow (&cu_list, val, 8);
20514 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
20515 obstack_grow (&cu_list, val, 8);
20518 /* Dump the address map. */
20519 write_address_map (objfile, &addr_obstack, cu_index_htab);
20521 /* Write out the .debug_type entries, if any. */
20522 if (dwarf2_per_objfile->signatured_types)
20524 struct signatured_type_index_data sig_data;
20526 sig_data.objfile = objfile;
20527 sig_data.symtab = symtab;
20528 sig_data.types_list = &types_cu_list;
20529 sig_data.psyms_seen = psyms_seen;
20530 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
20531 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
20532 write_one_signatured_type, &sig_data);
20535 /* Now that we've processed all symbols we can shrink their cu_indices
20537 uniquify_cu_indices (symtab);
20539 obstack_init (&constant_pool);
20540 make_cleanup_obstack_free (&constant_pool);
20541 obstack_init (&symtab_obstack);
20542 make_cleanup_obstack_free (&symtab_obstack);
20543 write_hash_table (symtab, &symtab_obstack, &constant_pool);
20545 obstack_init (&contents);
20546 make_cleanup_obstack_free (&contents);
20547 size_of_contents = 6 * sizeof (offset_type);
20548 total_len = size_of_contents;
20550 /* The version number. */
20551 val = MAYBE_SWAP (8);
20552 obstack_grow (&contents, &val, sizeof (val));
20554 /* The offset of the CU list from the start of the file. */
20555 val = MAYBE_SWAP (total_len);
20556 obstack_grow (&contents, &val, sizeof (val));
20557 total_len += obstack_object_size (&cu_list);
20559 /* The offset of the types CU list from the start of the file. */
20560 val = MAYBE_SWAP (total_len);
20561 obstack_grow (&contents, &val, sizeof (val));
20562 total_len += obstack_object_size (&types_cu_list);
20564 /* The offset of the address table from the start of the file. */
20565 val = MAYBE_SWAP (total_len);
20566 obstack_grow (&contents, &val, sizeof (val));
20567 total_len += obstack_object_size (&addr_obstack);
20569 /* The offset of the symbol table from the start of the file. */
20570 val = MAYBE_SWAP (total_len);
20571 obstack_grow (&contents, &val, sizeof (val));
20572 total_len += obstack_object_size (&symtab_obstack);
20574 /* The offset of the constant pool from the start of the file. */
20575 val = MAYBE_SWAP (total_len);
20576 obstack_grow (&contents, &val, sizeof (val));
20577 total_len += obstack_object_size (&constant_pool);
20579 gdb_assert (obstack_object_size (&contents) == size_of_contents);
20581 write_obstack (out_file, &contents);
20582 write_obstack (out_file, &cu_list);
20583 write_obstack (out_file, &types_cu_list);
20584 write_obstack (out_file, &addr_obstack);
20585 write_obstack (out_file, &symtab_obstack);
20586 write_obstack (out_file, &constant_pool);
20590 /* We want to keep the file, so we set cleanup_filename to NULL
20591 here. See unlink_if_set. */
20592 cleanup_filename = NULL;
20594 do_cleanups (cleanup);
20597 /* Implementation of the `save gdb-index' command.
20599 Note that the file format used by this command is documented in the
20600 GDB manual. Any changes here must be documented there. */
20603 save_gdb_index_command (char *arg, int from_tty)
20605 struct objfile *objfile;
20608 error (_("usage: save gdb-index DIRECTORY"));
20610 ALL_OBJFILES (objfile)
20614 /* If the objfile does not correspond to an actual file, skip it. */
20615 if (stat (objfile->name, &st) < 0)
20618 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
20619 if (dwarf2_per_objfile)
20621 volatile struct gdb_exception except;
20623 TRY_CATCH (except, RETURN_MASK_ERROR)
20625 write_psymtabs_to_index (objfile, arg);
20627 if (except.reason < 0)
20628 exception_fprintf (gdb_stderr, except,
20629 _("Error while writing index for `%s': "),
20637 int dwarf2_always_disassemble;
20640 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
20641 struct cmd_list_element *c, const char *value)
20643 fprintf_filtered (file,
20644 _("Whether to always disassemble "
20645 "DWARF expressions is %s.\n"),
20650 show_check_physname (struct ui_file *file, int from_tty,
20651 struct cmd_list_element *c, const char *value)
20653 fprintf_filtered (file,
20654 _("Whether to check \"physname\" is %s.\n"),
20658 void _initialize_dwarf2_read (void);
20661 _initialize_dwarf2_read (void)
20663 struct cmd_list_element *c;
20665 dwarf2_objfile_data_key
20666 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
20668 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
20669 Set DWARF 2 specific variables.\n\
20670 Configure DWARF 2 variables such as the cache size"),
20671 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
20672 0/*allow-unknown*/, &maintenance_set_cmdlist);
20674 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
20675 Show DWARF 2 specific variables\n\
20676 Show DWARF 2 variables such as the cache size"),
20677 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
20678 0/*allow-unknown*/, &maintenance_show_cmdlist);
20680 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
20681 &dwarf2_max_cache_age, _("\
20682 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20683 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20684 A higher limit means that cached compilation units will be stored\n\
20685 in memory longer, and more total memory will be used. Zero disables\n\
20686 caching, which can slow down startup."),
20688 show_dwarf2_max_cache_age,
20689 &set_dwarf2_cmdlist,
20690 &show_dwarf2_cmdlist);
20692 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
20693 &dwarf2_always_disassemble, _("\
20694 Set whether `info address' always disassembles DWARF expressions."), _("\
20695 Show whether `info address' always disassembles DWARF expressions."), _("\
20696 When enabled, DWARF expressions are always printed in an assembly-like\n\
20697 syntax. When disabled, expressions will be printed in a more\n\
20698 conversational style, when possible."),
20700 show_dwarf2_always_disassemble,
20701 &set_dwarf2_cmdlist,
20702 &show_dwarf2_cmdlist);
20704 add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\
20705 Set debugging of the dwarf2 reader."), _("\
20706 Show debugging of the dwarf2 reader."), _("\
20707 When enabled, debugging messages are printed during dwarf2 reading\n\
20708 and symtab expansion."),
20711 &setdebuglist, &showdebuglist);
20713 add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
20714 Set debugging of the dwarf2 DIE reader."), _("\
20715 Show debugging of the dwarf2 DIE reader."), _("\
20716 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20717 The value is the maximum depth to print."),
20720 &setdebuglist, &showdebuglist);
20722 add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\
20723 Set cross-checking of \"physname\" code against demangler."), _("\
20724 Show cross-checking of \"physname\" code against demangler."), _("\
20725 When enabled, GDB's internal \"physname\" code is checked against\n\
20727 NULL, show_check_physname,
20728 &setdebuglist, &showdebuglist);
20730 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20731 no_class, &use_deprecated_index_sections, _("\
20732 Set whether to use deprecated gdb_index sections."), _("\
20733 Show whether to use deprecated gdb_index sections."), _("\
20734 When enabled, deprecated .gdb_index sections are used anyway.\n\
20735 Normally they are ignored either because of a missing feature or\n\
20736 performance issue.\n\
20737 Warning: This option must be enabled before gdb reads the file."),
20740 &setlist, &showlist);
20742 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
20744 Save a gdb-index file.\n\
20745 Usage: save gdb-index DIRECTORY"),
20747 set_cmd_completer (c, filename_completer);
20749 dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED,
20750 &dwarf2_locexpr_funcs);
20751 dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED,
20752 &dwarf2_loclist_funcs);
20754 dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK,
20755 &dwarf2_block_frame_base_locexpr_funcs);
20756 dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK,
20757 &dwarf2_block_frame_base_loclist_funcs);