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"
72 #include "gdb_string.h"
73 #include "gdb_assert.h"
74 #include <sys/types.h>
76 typedef struct symbol *symbolp;
79 /* When non-zero, print basic high level tracing messages.
80 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
81 static int dwarf2_read_debug = 0;
83 /* When non-zero, dump DIEs after they are read in. */
84 static unsigned int dwarf2_die_debug = 0;
86 /* When non-zero, cross-check physname against demangler. */
87 static int check_physname = 0;
89 /* When non-zero, do not reject deprecated .gdb_index sections. */
90 static int use_deprecated_index_sections = 0;
92 static const struct objfile_data *dwarf2_objfile_data_key;
94 struct dwarf2_section_info
99 /* True if we have tried to read this section. */
103 typedef struct dwarf2_section_info dwarf2_section_info_def;
104 DEF_VEC_O (dwarf2_section_info_def);
106 /* All offsets in the index are of this type. It must be
107 architecture-independent. */
108 typedef uint32_t offset_type;
110 DEF_VEC_I (offset_type);
112 /* Ensure only legit values are used. */
113 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
115 gdb_assert ((unsigned int) (value) <= 1); \
116 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
119 /* Ensure only legit values are used. */
120 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
122 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
123 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
124 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
127 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
128 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
130 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
131 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
134 /* A description of the mapped index. The file format is described in
135 a comment by the code that writes the index. */
138 /* Index data format version. */
141 /* The total length of the buffer. */
144 /* A pointer to the address table data. */
145 const gdb_byte *address_table;
147 /* Size of the address table data in bytes. */
148 offset_type address_table_size;
150 /* The symbol table, implemented as a hash table. */
151 const offset_type *symbol_table;
153 /* Size in slots, each slot is 2 offset_types. */
154 offset_type symbol_table_slots;
156 /* A pointer to the constant pool. */
157 const char *constant_pool;
160 typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr;
161 DEF_VEC_P (dwarf2_per_cu_ptr);
163 /* Collection of data recorded per objfile.
164 This hangs off of dwarf2_objfile_data_key. */
166 struct dwarf2_per_objfile
168 struct dwarf2_section_info info;
169 struct dwarf2_section_info abbrev;
170 struct dwarf2_section_info line;
171 struct dwarf2_section_info loc;
172 struct dwarf2_section_info macinfo;
173 struct dwarf2_section_info macro;
174 struct dwarf2_section_info str;
175 struct dwarf2_section_info ranges;
176 struct dwarf2_section_info addr;
177 struct dwarf2_section_info frame;
178 struct dwarf2_section_info eh_frame;
179 struct dwarf2_section_info gdb_index;
181 VEC (dwarf2_section_info_def) *types;
184 struct objfile *objfile;
186 /* Table of all the compilation units. This is used to locate
187 the target compilation unit of a particular reference. */
188 struct dwarf2_per_cu_data **all_comp_units;
190 /* The number of compilation units in ALL_COMP_UNITS. */
193 /* The number of .debug_types-related CUs. */
196 /* The .debug_types-related CUs (TUs). */
197 struct signatured_type **all_type_units;
199 /* The number of entries in all_type_unit_groups. */
200 int n_type_unit_groups;
202 /* Table of type unit groups.
203 This exists to make it easy to iterate over all CUs and TU groups. */
204 struct type_unit_group **all_type_unit_groups;
206 /* Table of struct type_unit_group objects.
207 The hash key is the DW_AT_stmt_list value. */
208 htab_t type_unit_groups;
210 /* A table mapping .debug_types signatures to its signatured_type entry.
211 This is NULL if the .debug_types section hasn't been read in yet. */
212 htab_t signatured_types;
214 /* Type unit statistics, to see how well the scaling improvements
218 int nr_uniq_abbrev_tables;
220 int nr_symtab_sharers;
221 int nr_stmt_less_type_units;
224 /* A chain of compilation units that are currently read in, so that
225 they can be freed later. */
226 struct dwarf2_per_cu_data *read_in_chain;
228 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
229 This is NULL if the table hasn't been allocated yet. */
232 /* Non-zero if we've check for whether there is a DWP file. */
235 /* The DWP file if there is one, or NULL. */
236 struct dwp_file *dwp_file;
238 /* The shared '.dwz' file, if one exists. This is used when the
239 original data was compressed using 'dwz -m'. */
240 struct dwz_file *dwz_file;
242 /* A flag indicating wether this objfile has a section loaded at a
244 int has_section_at_zero;
246 /* True if we are using the mapped index,
247 or we are faking it for OBJF_READNOW's sake. */
248 unsigned char using_index;
250 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
251 struct mapped_index *index_table;
253 /* When using index_table, this keeps track of all quick_file_names entries.
254 TUs typically share line table entries with a CU, so we maintain a
255 separate table of all line table entries to support the sharing.
256 Note that while there can be way more TUs than CUs, we've already
257 sorted all the TUs into "type unit groups", grouped by their
258 DW_AT_stmt_list value. Therefore the only sharing done here is with a
259 CU and its associated TU group if there is one. */
260 htab_t quick_file_names_table;
262 /* Set during partial symbol reading, to prevent queueing of full
264 int reading_partial_symbols;
266 /* Table mapping type DIEs to their struct type *.
267 This is NULL if not allocated yet.
268 The mapping is done via (CU/TU signature + DIE offset) -> type. */
269 htab_t die_type_hash;
271 /* The CUs we recently read. */
272 VEC (dwarf2_per_cu_ptr) *just_read_cus;
275 static struct dwarf2_per_objfile *dwarf2_per_objfile;
277 /* Default names of the debugging sections. */
279 /* Note that if the debugging section has been compressed, it might
280 have a name like .zdebug_info. */
282 static const struct dwarf2_debug_sections dwarf2_elf_names =
284 { ".debug_info", ".zdebug_info" },
285 { ".debug_abbrev", ".zdebug_abbrev" },
286 { ".debug_line", ".zdebug_line" },
287 { ".debug_loc", ".zdebug_loc" },
288 { ".debug_macinfo", ".zdebug_macinfo" },
289 { ".debug_macro", ".zdebug_macro" },
290 { ".debug_str", ".zdebug_str" },
291 { ".debug_ranges", ".zdebug_ranges" },
292 { ".debug_types", ".zdebug_types" },
293 { ".debug_addr", ".zdebug_addr" },
294 { ".debug_frame", ".zdebug_frame" },
295 { ".eh_frame", NULL },
296 { ".gdb_index", ".zgdb_index" },
300 /* List of DWO/DWP sections. */
302 static const struct dwop_section_names
304 struct dwarf2_section_names abbrev_dwo;
305 struct dwarf2_section_names info_dwo;
306 struct dwarf2_section_names line_dwo;
307 struct dwarf2_section_names loc_dwo;
308 struct dwarf2_section_names macinfo_dwo;
309 struct dwarf2_section_names macro_dwo;
310 struct dwarf2_section_names str_dwo;
311 struct dwarf2_section_names str_offsets_dwo;
312 struct dwarf2_section_names types_dwo;
313 struct dwarf2_section_names cu_index;
314 struct dwarf2_section_names tu_index;
318 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
319 { ".debug_info.dwo", ".zdebug_info.dwo" },
320 { ".debug_line.dwo", ".zdebug_line.dwo" },
321 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
322 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
323 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
324 { ".debug_str.dwo", ".zdebug_str.dwo" },
325 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
326 { ".debug_types.dwo", ".zdebug_types.dwo" },
327 { ".debug_cu_index", ".zdebug_cu_index" },
328 { ".debug_tu_index", ".zdebug_tu_index" },
331 /* local data types */
333 /* The data in a compilation unit header, after target2host
334 translation, looks like this. */
335 struct comp_unit_head
339 unsigned char addr_size;
340 unsigned char signed_addr_p;
341 sect_offset abbrev_offset;
343 /* Size of file offsets; either 4 or 8. */
344 unsigned int offset_size;
346 /* Size of the length field; either 4 or 12. */
347 unsigned int initial_length_size;
349 /* Offset to the first byte of this compilation unit header in the
350 .debug_info section, for resolving relative reference dies. */
353 /* Offset to first die in this cu from the start of the cu.
354 This will be the first byte following the compilation unit header. */
355 cu_offset first_die_offset;
358 /* Type used for delaying computation of method physnames.
359 See comments for compute_delayed_physnames. */
360 struct delayed_method_info
362 /* The type to which the method is attached, i.e., its parent class. */
365 /* The index of the method in the type's function fieldlists. */
368 /* The index of the method in the fieldlist. */
371 /* The name of the DIE. */
374 /* The DIE associated with this method. */
375 struct die_info *die;
378 typedef struct delayed_method_info delayed_method_info;
379 DEF_VEC_O (delayed_method_info);
381 /* Internal state when decoding a particular compilation unit. */
384 /* The objfile containing this compilation unit. */
385 struct objfile *objfile;
387 /* The header of the compilation unit. */
388 struct comp_unit_head header;
390 /* Base address of this compilation unit. */
391 CORE_ADDR base_address;
393 /* Non-zero if base_address has been set. */
396 /* The language we are debugging. */
397 enum language language;
398 const struct language_defn *language_defn;
400 const char *producer;
402 /* The generic symbol table building routines have separate lists for
403 file scope symbols and all all other scopes (local scopes). So
404 we need to select the right one to pass to add_symbol_to_list().
405 We do it by keeping a pointer to the correct list in list_in_scope.
407 FIXME: The original dwarf code just treated the file scope as the
408 first local scope, and all other local scopes as nested local
409 scopes, and worked fine. Check to see if we really need to
410 distinguish these in buildsym.c. */
411 struct pending **list_in_scope;
413 /* The abbrev table for this CU.
414 Normally this points to the abbrev table in the objfile.
415 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
416 struct abbrev_table *abbrev_table;
418 /* Hash table holding all the loaded partial DIEs
419 with partial_die->offset.SECT_OFF as hash. */
422 /* Storage for things with the same lifetime as this read-in compilation
423 unit, including partial DIEs. */
424 struct obstack comp_unit_obstack;
426 /* When multiple dwarf2_cu structures are living in memory, this field
427 chains them all together, so that they can be released efficiently.
428 We will probably also want a generation counter so that most-recently-used
429 compilation units are cached... */
430 struct dwarf2_per_cu_data *read_in_chain;
432 /* Backchain to our per_cu entry if the tree has been built. */
433 struct dwarf2_per_cu_data *per_cu;
435 /* How many compilation units ago was this CU last referenced? */
438 /* A hash table of DIE cu_offset for following references with
439 die_info->offset.sect_off as hash. */
442 /* Full DIEs if read in. */
443 struct die_info *dies;
445 /* A set of pointers to dwarf2_per_cu_data objects for compilation
446 units referenced by this one. Only set during full symbol processing;
447 partial symbol tables do not have dependencies. */
450 /* Header data from the line table, during full symbol processing. */
451 struct line_header *line_header;
453 /* A list of methods which need to have physnames computed
454 after all type information has been read. */
455 VEC (delayed_method_info) *method_list;
457 /* To be copied to symtab->call_site_htab. */
458 htab_t call_site_htab;
460 /* Non-NULL if this CU came from a DWO file.
461 There is an invariant here that is important to remember:
462 Except for attributes copied from the top level DIE in the "main"
463 (or "stub") file in preparation for reading the DWO file
464 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
465 Either there isn't a DWO file (in which case this is NULL and the point
466 is moot), or there is and either we're not going to read it (in which
467 case this is NULL) or there is and we are reading it (in which case this
469 struct dwo_unit *dwo_unit;
471 /* The DW_AT_addr_base attribute if present, zero otherwise
472 (zero is a valid value though).
473 Note this value comes from the stub CU/TU's DIE. */
476 /* The DW_AT_ranges_base attribute if present, zero otherwise
477 (zero is a valid value though).
478 Note this value comes from the stub CU/TU's DIE.
479 Also note that the value is zero in the non-DWO case so this value can
480 be used without needing to know whether DWO files are in use or not.
481 N.B. This does not apply to DW_AT_ranges appearing in
482 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
483 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
484 DW_AT_ranges_base *would* have to be applied, and we'd have to care
485 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
486 ULONGEST ranges_base;
488 /* Mark used when releasing cached dies. */
489 unsigned int mark : 1;
491 /* This CU references .debug_loc. See the symtab->locations_valid field.
492 This test is imperfect as there may exist optimized debug code not using
493 any location list and still facing inlining issues if handled as
494 unoptimized code. For a future better test see GCC PR other/32998. */
495 unsigned int has_loclist : 1;
497 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
498 if all the producer_is_* fields are valid. This information is cached
499 because profiling CU expansion showed excessive time spent in
500 producer_is_gxx_lt_4_6. */
501 unsigned int checked_producer : 1;
502 unsigned int producer_is_gxx_lt_4_6 : 1;
503 unsigned int producer_is_gcc_lt_4_3 : 1;
504 unsigned int producer_is_icc : 1;
506 /* When set, the file that we're processing is known to have
507 debugging info for C++ namespaces. GCC 3.3.x did not produce
508 this information, but later versions do. */
510 unsigned int processing_has_namespace_info : 1;
513 /* Persistent data held for a compilation unit, even when not
514 processing it. We put a pointer to this structure in the
515 read_symtab_private field of the psymtab. */
517 struct dwarf2_per_cu_data
519 /* The start offset and length of this compilation unit.
520 NOTE: Unlike comp_unit_head.length, this length includes
522 If the DIE refers to a DWO file, this is always of the original die,
527 /* Flag indicating this compilation unit will be read in before
528 any of the current compilation units are processed. */
529 unsigned int queued : 1;
531 /* This flag will be set when reading partial DIEs if we need to load
532 absolutely all DIEs for this compilation unit, instead of just the ones
533 we think are interesting. It gets set if we look for a DIE in the
534 hash table and don't find it. */
535 unsigned int load_all_dies : 1;
537 /* Non-zero if this CU is from .debug_types. */
538 unsigned int is_debug_types : 1;
540 /* Non-zero if this CU is from the .dwz file. */
541 unsigned int is_dwz : 1;
543 /* The section this CU/TU lives in.
544 If the DIE refers to a DWO file, this is always the original die,
546 struct dwarf2_section_info *info_or_types_section;
548 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
549 of the CU cache it gets reset to NULL again. */
550 struct dwarf2_cu *cu;
552 /* The corresponding objfile.
553 Normally we can get the objfile from dwarf2_per_objfile.
554 However we can enter this file with just a "per_cu" handle. */
555 struct objfile *objfile;
557 /* When using partial symbol tables, the 'psymtab' field is active.
558 Otherwise the 'quick' field is active. */
561 /* The partial symbol table associated with this compilation unit,
562 or NULL for unread partial units. */
563 struct partial_symtab *psymtab;
565 /* Data needed by the "quick" functions. */
566 struct dwarf2_per_cu_quick_data *quick;
569 /* The CUs we import using DW_TAG_imported_unit. This is filled in
570 while reading psymtabs, used to compute the psymtab dependencies,
571 and then cleared. Then it is filled in again while reading full
572 symbols, and only deleted when the objfile is destroyed.
574 This is also used to work around a difference between the way gold
575 generates .gdb_index version <=7 and the way gdb does. Arguably this
576 is a gold bug. For symbols coming from TUs, gold records in the index
577 the CU that includes the TU instead of the TU itself. This breaks
578 dw2_lookup_symbol: It assumes that if the index says symbol X lives
579 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
580 will find X. Alas TUs live in their own symtab, so after expanding CU Y
581 we need to look in TU Z to find X. Fortunately, this is akin to
582 DW_TAG_imported_unit, so we just use the same mechanism: For
583 .gdb_index version <=7 this also records the TUs that the CU referred
584 to. Concurrently with this change gdb was modified to emit version 8
585 indices so we only pay a price for gold generated indices. */
586 VEC (dwarf2_per_cu_ptr) *imported_symtabs;
588 /* Type units are grouped by their DW_AT_stmt_list entry so that they
589 can share them. If this is a TU, this points to the containing
591 struct type_unit_group *type_unit_group;
594 /* Entry in the signatured_types hash table. */
596 struct signatured_type
598 /* The "per_cu" object of this type.
599 N.B.: This is the first member so that it's easy to convert pointers
601 struct dwarf2_per_cu_data per_cu;
603 /* The type's signature. */
606 /* Offset in the TU of the type's DIE, as read from the TU header.
607 If the definition lives in a DWO file, this value is unusable. */
608 cu_offset type_offset_in_tu;
610 /* Offset in the section of the type's DIE.
611 If the definition lives in a DWO file, this is the offset in the
612 .debug_types.dwo section.
613 The value is zero until the actual value is known.
614 Zero is otherwise not a valid section offset. */
615 sect_offset type_offset_in_section;
618 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
619 This includes type_unit_group and quick_file_names. */
621 struct stmt_list_hash
623 /* The DWO unit this table is from or NULL if there is none. */
624 struct dwo_unit *dwo_unit;
626 /* Offset in .debug_line or .debug_line.dwo. */
627 sect_offset line_offset;
630 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
631 an object of this type. */
633 struct type_unit_group
635 /* dwarf2read.c's main "handle" on the symtab.
636 To simplify things we create an artificial CU that "includes" all the
637 type units using this stmt_list so that the rest of the code still has
638 a "per_cu" handle on the symtab.
639 This PER_CU is recognized by having no section. */
640 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
641 struct dwarf2_per_cu_data per_cu;
645 /* The TUs that share this DW_AT_stmt_list entry.
646 This is added to while parsing type units to build partial symtabs,
647 and is deleted afterwards and not used again. */
648 VEC (dwarf2_per_cu_ptr) *tus;
650 /* When reading the line table in "quick" functions, we need a real TU.
651 Any will do, we know they all share the same DW_AT_stmt_list entry.
652 For simplicity's sake, we pick the first one. */
653 struct dwarf2_per_cu_data *first_tu;
656 /* The primary symtab.
657 Type units in a group needn't all be defined in the same source file,
658 so we create an essentially anonymous symtab as the primary symtab. */
659 struct symtab *primary_symtab;
661 /* The data used to construct the hash key. */
662 struct stmt_list_hash hash;
664 /* The number of symtabs from the line header.
665 The value here must match line_header.num_file_names. */
666 unsigned int num_symtabs;
668 /* The symbol tables for this TU (obtained from the files listed in
670 WARNING: The order of entries here must match the order of entries
671 in the line header. After the first TU using this type_unit_group, the
672 line header for the subsequent TUs is recreated from this. This is done
673 because we need to use the same symtabs for each TU using the same
674 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
675 there's no guarantee the line header doesn't have duplicate entries. */
676 struct symtab **symtabs;
679 /* These sections are what may appear in a DWO file. */
683 struct dwarf2_section_info abbrev;
684 struct dwarf2_section_info line;
685 struct dwarf2_section_info loc;
686 struct dwarf2_section_info macinfo;
687 struct dwarf2_section_info macro;
688 struct dwarf2_section_info str;
689 struct dwarf2_section_info str_offsets;
690 /* In the case of a virtual DWO file, these two are unused. */
691 struct dwarf2_section_info info;
692 VEC (dwarf2_section_info_def) *types;
695 /* Common bits of DWO CUs/TUs. */
699 /* Backlink to the containing struct dwo_file. */
700 struct dwo_file *dwo_file;
702 /* The "id" that distinguishes this CU/TU.
703 .debug_info calls this "dwo_id", .debug_types calls this "signature".
704 Since signatures came first, we stick with it for consistency. */
707 /* The section this CU/TU lives in, in the DWO file. */
708 struct dwarf2_section_info *info_or_types_section;
710 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
714 /* For types, offset in the type's DIE of the type defined by this TU. */
715 cu_offset type_offset_in_tu;
718 /* Data for one DWO file.
719 This includes virtual DWO files that have been packaged into a
724 /* The DW_AT_GNU_dwo_name attribute. This is the hash key.
725 For virtual DWO files the name is constructed from the section offsets
726 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
727 from related CU+TUs. */
730 /* The bfd, when the file is open. Otherwise this is NULL.
731 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
734 /* Section info for this file. */
735 struct dwo_sections sections;
737 /* Table of CUs in the file.
738 Each element is a struct dwo_unit. */
741 /* Table of TUs in the file.
742 Each element is a struct dwo_unit. */
746 /* These sections are what may appear in a DWP file. */
750 struct dwarf2_section_info str;
751 struct dwarf2_section_info cu_index;
752 struct dwarf2_section_info tu_index;
753 /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
754 by section number. We don't need to record them here. */
757 /* These sections are what may appear in a virtual DWO file. */
759 struct virtual_dwo_sections
761 struct dwarf2_section_info abbrev;
762 struct dwarf2_section_info line;
763 struct dwarf2_section_info loc;
764 struct dwarf2_section_info macinfo;
765 struct dwarf2_section_info macro;
766 struct dwarf2_section_info str_offsets;
767 /* Each DWP hash table entry records one CU or one TU.
768 That is recorded here, and copied to dwo_unit.info_or_types_section. */
769 struct dwarf2_section_info info_or_types;
772 /* Contents of DWP hash tables. */
774 struct dwp_hash_table
776 uint32_t nr_units, nr_slots;
777 const gdb_byte *hash_table, *unit_table, *section_pool;
780 /* Data for one DWP file. */
784 /* Name of the file. */
787 /* The bfd, when the file is open. Otherwise this is NULL. */
790 /* Section info for this file. */
791 struct dwp_sections sections;
793 /* Table of CUs in the file. */
794 const struct dwp_hash_table *cus;
796 /* Table of TUs in the file. */
797 const struct dwp_hash_table *tus;
799 /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
802 /* Table to map ELF section numbers to their sections. */
803 unsigned int num_sections;
804 asection **elf_sections;
807 /* This represents a '.dwz' file. */
811 /* A dwz file can only contain a few sections. */
812 struct dwarf2_section_info abbrev;
813 struct dwarf2_section_info info;
814 struct dwarf2_section_info str;
815 struct dwarf2_section_info line;
816 struct dwarf2_section_info macro;
817 struct dwarf2_section_info gdb_index;
823 /* Struct used to pass misc. parameters to read_die_and_children, et
824 al. which are used for both .debug_info and .debug_types dies.
825 All parameters here are unchanging for the life of the call. This
826 struct exists to abstract away the constant parameters of die reading. */
828 struct die_reader_specs
830 /* die_section->asection->owner. */
833 /* The CU of the DIE we are parsing. */
834 struct dwarf2_cu *cu;
836 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
837 struct dwo_file *dwo_file;
839 /* The section the die comes from.
840 This is either .debug_info or .debug_types, or the .dwo variants. */
841 struct dwarf2_section_info *die_section;
843 /* die_section->buffer. */
846 /* The end of the buffer. */
847 const gdb_byte *buffer_end;
850 /* Type of function passed to init_cutu_and_read_dies, et.al. */
851 typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader,
853 struct die_info *comp_unit_die,
857 /* The line number information for a compilation unit (found in the
858 .debug_line section) begins with a "statement program header",
859 which contains the following information. */
862 unsigned int total_length;
863 unsigned short version;
864 unsigned int header_length;
865 unsigned char minimum_instruction_length;
866 unsigned char maximum_ops_per_instruction;
867 unsigned char default_is_stmt;
869 unsigned char line_range;
870 unsigned char opcode_base;
872 /* standard_opcode_lengths[i] is the number of operands for the
873 standard opcode whose value is i. This means that
874 standard_opcode_lengths[0] is unused, and the last meaningful
875 element is standard_opcode_lengths[opcode_base - 1]. */
876 unsigned char *standard_opcode_lengths;
878 /* The include_directories table. NOTE! These strings are not
879 allocated with xmalloc; instead, they are pointers into
880 debug_line_buffer. If you try to free them, `free' will get
882 unsigned int num_include_dirs, include_dirs_size;
885 /* The file_names table. NOTE! These strings are not allocated
886 with xmalloc; instead, they are pointers into debug_line_buffer.
887 Don't try to free them directly. */
888 unsigned int num_file_names, file_names_size;
892 unsigned int dir_index;
893 unsigned int mod_time;
895 int included_p; /* Non-zero if referenced by the Line Number Program. */
896 struct symtab *symtab; /* The associated symbol table, if any. */
899 /* The start and end of the statement program following this
900 header. These point into dwarf2_per_objfile->line_buffer. */
901 gdb_byte *statement_program_start, *statement_program_end;
904 /* When we construct a partial symbol table entry we only
905 need this much information. */
906 struct partial_die_info
908 /* Offset of this DIE. */
911 /* DWARF-2 tag for this DIE. */
912 ENUM_BITFIELD(dwarf_tag) tag : 16;
914 /* Assorted flags describing the data found in this DIE. */
915 unsigned int has_children : 1;
916 unsigned int is_external : 1;
917 unsigned int is_declaration : 1;
918 unsigned int has_type : 1;
919 unsigned int has_specification : 1;
920 unsigned int has_pc_info : 1;
921 unsigned int may_be_inlined : 1;
923 /* Flag set if the SCOPE field of this structure has been
925 unsigned int scope_set : 1;
927 /* Flag set if the DIE has a byte_size attribute. */
928 unsigned int has_byte_size : 1;
930 /* Flag set if any of the DIE's children are template arguments. */
931 unsigned int has_template_arguments : 1;
933 /* Flag set if fixup_partial_die has been called on this die. */
934 unsigned int fixup_called : 1;
936 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
937 unsigned int is_dwz : 1;
939 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
940 unsigned int spec_is_dwz : 1;
942 /* The name of this DIE. Normally the value of DW_AT_name, but
943 sometimes a default name for unnamed DIEs. */
946 /* The linkage name, if present. */
947 const char *linkage_name;
949 /* The scope to prepend to our children. This is generally
950 allocated on the comp_unit_obstack, so will disappear
951 when this compilation unit leaves the cache. */
954 /* Some data associated with the partial DIE. The tag determines
955 which field is live. */
958 /* The location description associated with this DIE, if any. */
959 struct dwarf_block *locdesc;
960 /* The offset of an import, for DW_TAG_imported_unit. */
964 /* If HAS_PC_INFO, the PC range associated with this DIE. */
968 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
969 DW_AT_sibling, if any. */
970 /* NOTE: This member isn't strictly necessary, read_partial_die could
971 return DW_AT_sibling values to its caller load_partial_dies. */
974 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
975 DW_AT_specification (or DW_AT_abstract_origin or
977 sect_offset spec_offset;
979 /* Pointers to this DIE's parent, first child, and next sibling,
981 struct partial_die_info *die_parent, *die_child, *die_sibling;
984 /* This data structure holds the information of an abbrev. */
987 unsigned int number; /* number identifying abbrev */
988 enum dwarf_tag tag; /* dwarf tag */
989 unsigned short has_children; /* boolean */
990 unsigned short num_attrs; /* number of attributes */
991 struct attr_abbrev *attrs; /* an array of attribute descriptions */
992 struct abbrev_info *next; /* next in chain */
997 ENUM_BITFIELD(dwarf_attribute) name : 16;
998 ENUM_BITFIELD(dwarf_form) form : 16;
1001 /* Size of abbrev_table.abbrev_hash_table. */
1002 #define ABBREV_HASH_SIZE 121
1004 /* Top level data structure to contain an abbreviation table. */
1008 /* Where the abbrev table came from.
1009 This is used as a sanity check when the table is used. */
1012 /* Storage for the abbrev table. */
1013 struct obstack abbrev_obstack;
1015 /* Hash table of abbrevs.
1016 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1017 It could be statically allocated, but the previous code didn't so we
1019 struct abbrev_info **abbrevs;
1022 /* Attributes have a name and a value. */
1025 ENUM_BITFIELD(dwarf_attribute) name : 16;
1026 ENUM_BITFIELD(dwarf_form) form : 15;
1028 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1029 field should be in u.str (existing only for DW_STRING) but it is kept
1030 here for better struct attribute alignment. */
1031 unsigned int string_is_canonical : 1;
1036 struct dwarf_block *blk;
1040 struct signatured_type *signatured_type;
1045 /* This data structure holds a complete die structure. */
1048 /* DWARF-2 tag for this DIE. */
1049 ENUM_BITFIELD(dwarf_tag) tag : 16;
1051 /* Number of attributes */
1052 unsigned char num_attrs;
1054 /* True if we're presently building the full type name for the
1055 type derived from this DIE. */
1056 unsigned char building_fullname : 1;
1059 unsigned int abbrev;
1061 /* Offset in .debug_info or .debug_types section. */
1064 /* The dies in a compilation unit form an n-ary tree. PARENT
1065 points to this die's parent; CHILD points to the first child of
1066 this node; and all the children of a given node are chained
1067 together via their SIBLING fields. */
1068 struct die_info *child; /* Its first child, if any. */
1069 struct die_info *sibling; /* Its next sibling, if any. */
1070 struct die_info *parent; /* Its parent, if any. */
1072 /* An array of attributes, with NUM_ATTRS elements. There may be
1073 zero, but it's not common and zero-sized arrays are not
1074 sufficiently portable C. */
1075 struct attribute attrs[1];
1078 /* Get at parts of an attribute structure. */
1080 #define DW_STRING(attr) ((attr)->u.str)
1081 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1082 #define DW_UNSND(attr) ((attr)->u.unsnd)
1083 #define DW_BLOCK(attr) ((attr)->u.blk)
1084 #define DW_SND(attr) ((attr)->u.snd)
1085 #define DW_ADDR(attr) ((attr)->u.addr)
1086 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
1088 /* Blocks are a bunch of untyped bytes. */
1093 /* Valid only if SIZE is not zero. */
1097 #ifndef ATTR_ALLOC_CHUNK
1098 #define ATTR_ALLOC_CHUNK 4
1101 /* Allocate fields for structs, unions and enums in this size. */
1102 #ifndef DW_FIELD_ALLOC_CHUNK
1103 #define DW_FIELD_ALLOC_CHUNK 4
1106 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1107 but this would require a corresponding change in unpack_field_as_long
1109 static int bits_per_byte = 8;
1111 /* The routines that read and process dies for a C struct or C++ class
1112 pass lists of data member fields and lists of member function fields
1113 in an instance of a field_info structure, as defined below. */
1116 /* List of data member and baseclasses fields. */
1119 struct nextfield *next;
1124 *fields, *baseclasses;
1126 /* Number of fields (including baseclasses). */
1129 /* Number of baseclasses. */
1132 /* Set if the accesibility of one of the fields is not public. */
1133 int non_public_fields;
1135 /* Member function fields array, entries are allocated in the order they
1136 are encountered in the object file. */
1139 struct nextfnfield *next;
1140 struct fn_field fnfield;
1144 /* Member function fieldlist array, contains name of possibly overloaded
1145 member function, number of overloaded member functions and a pointer
1146 to the head of the member function field chain. */
1151 struct nextfnfield *head;
1155 /* Number of entries in the fnfieldlists array. */
1158 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1159 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1160 struct typedef_field_list
1162 struct typedef_field field;
1163 struct typedef_field_list *next;
1165 *typedef_field_list;
1166 unsigned typedef_field_list_count;
1169 /* One item on the queue of compilation units to read in full symbols
1171 struct dwarf2_queue_item
1173 struct dwarf2_per_cu_data *per_cu;
1174 enum language pretend_language;
1175 struct dwarf2_queue_item *next;
1178 /* The current queue. */
1179 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
1181 /* Loaded secondary compilation units are kept in memory until they
1182 have not been referenced for the processing of this many
1183 compilation units. Set this to zero to disable caching. Cache
1184 sizes of up to at least twenty will improve startup time for
1185 typical inter-CU-reference binaries, at an obvious memory cost. */
1186 static int dwarf2_max_cache_age = 5;
1188 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
1189 struct cmd_list_element *c, const char *value)
1191 fprintf_filtered (file, _("The upper bound on the age of cached "
1192 "dwarf2 compilation units is %s.\n"),
1197 /* Various complaints about symbol reading that don't abort the process. */
1200 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1202 complaint (&symfile_complaints,
1203 _("statement list doesn't fit in .debug_line section"));
1207 dwarf2_debug_line_missing_file_complaint (void)
1209 complaint (&symfile_complaints,
1210 _(".debug_line section has line data without a file"));
1214 dwarf2_debug_line_missing_end_sequence_complaint (void)
1216 complaint (&symfile_complaints,
1217 _(".debug_line section has line "
1218 "program sequence without an end"));
1222 dwarf2_complex_location_expr_complaint (void)
1224 complaint (&symfile_complaints, _("location expression too complex"));
1228 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
1231 complaint (&symfile_complaints,
1232 _("const value length mismatch for '%s', got %d, expected %d"),
1237 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
1239 complaint (&symfile_complaints,
1240 _("debug info runs off end of %s section"
1242 section->asection->name,
1243 bfd_get_filename (section->asection->owner));
1247 dwarf2_macro_malformed_definition_complaint (const char *arg1)
1249 complaint (&symfile_complaints,
1250 _("macro debug info contains a "
1251 "malformed macro definition:\n`%s'"),
1256 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
1258 complaint (&symfile_complaints,
1259 _("invalid attribute class or form for '%s' in '%s'"),
1263 /* local function prototypes */
1265 static void dwarf2_locate_sections (bfd *, asection *, void *);
1267 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
1270 static void dwarf2_find_base_address (struct die_info *die,
1271 struct dwarf2_cu *cu);
1273 static void dwarf2_build_psymtabs_hard (struct objfile *);
1275 static void scan_partial_symbols (struct partial_die_info *,
1276 CORE_ADDR *, CORE_ADDR *,
1277 int, struct dwarf2_cu *);
1279 static void add_partial_symbol (struct partial_die_info *,
1280 struct dwarf2_cu *);
1282 static void add_partial_namespace (struct partial_die_info *pdi,
1283 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1284 int need_pc, struct dwarf2_cu *cu);
1286 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
1287 CORE_ADDR *highpc, int need_pc,
1288 struct dwarf2_cu *cu);
1290 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
1291 struct dwarf2_cu *cu);
1293 static void add_partial_subprogram (struct partial_die_info *pdi,
1294 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1295 int need_pc, struct dwarf2_cu *cu);
1297 static void dwarf2_read_symtab (struct partial_symtab *,
1300 static void psymtab_to_symtab_1 (struct partial_symtab *);
1302 static struct abbrev_info *abbrev_table_lookup_abbrev
1303 (const struct abbrev_table *, unsigned int);
1305 static struct abbrev_table *abbrev_table_read_table
1306 (struct dwarf2_section_info *, sect_offset);
1308 static void abbrev_table_free (struct abbrev_table *);
1310 static void abbrev_table_free_cleanup (void *);
1312 static void dwarf2_read_abbrevs (struct dwarf2_cu *,
1313 struct dwarf2_section_info *);
1315 static void dwarf2_free_abbrev_table (void *);
1317 static unsigned int peek_abbrev_code (bfd *, gdb_byte *);
1319 static struct partial_die_info *load_partial_dies
1320 (const struct die_reader_specs *, gdb_byte *, int);
1322 static gdb_byte *read_partial_die (const struct die_reader_specs *,
1323 struct partial_die_info *,
1324 struct abbrev_info *,
1328 static struct partial_die_info *find_partial_die (sect_offset, int,
1329 struct dwarf2_cu *);
1331 static void fixup_partial_die (struct partial_die_info *,
1332 struct dwarf2_cu *);
1334 static gdb_byte *read_attribute (const struct die_reader_specs *,
1335 struct attribute *, struct attr_abbrev *,
1338 static unsigned int read_1_byte (bfd *, const gdb_byte *);
1340 static int read_1_signed_byte (bfd *, const gdb_byte *);
1342 static unsigned int read_2_bytes (bfd *, const gdb_byte *);
1344 static unsigned int read_4_bytes (bfd *, const gdb_byte *);
1346 static ULONGEST read_8_bytes (bfd *, const gdb_byte *);
1348 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
1351 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
1353 static LONGEST read_checked_initial_length_and_offset
1354 (bfd *, gdb_byte *, const struct comp_unit_head *,
1355 unsigned int *, unsigned int *);
1357 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
1360 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
1362 static sect_offset read_abbrev_offset (struct dwarf2_section_info *,
1365 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
1367 static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
1369 static char *read_indirect_string (bfd *, gdb_byte *,
1370 const struct comp_unit_head *,
1373 static char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST);
1375 static ULONGEST read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
1377 static LONGEST read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
1379 static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, gdb_byte *,
1382 static char *read_str_index (const struct die_reader_specs *reader,
1383 struct dwarf2_cu *cu, ULONGEST str_index);
1385 static void set_cu_language (unsigned int, struct dwarf2_cu *);
1387 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
1388 struct dwarf2_cu *);
1390 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
1393 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
1394 struct dwarf2_cu *cu);
1396 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
1398 static struct die_info *die_specification (struct die_info *die,
1399 struct dwarf2_cu **);
1401 static void free_line_header (struct line_header *lh);
1403 static void add_file_name (struct line_header *, char *, unsigned int,
1404 unsigned int, unsigned int);
1406 static struct line_header *dwarf_decode_line_header (unsigned int offset,
1407 struct dwarf2_cu *cu);
1409 static void dwarf_decode_lines (struct line_header *, const char *,
1410 struct dwarf2_cu *, struct partial_symtab *,
1413 static void dwarf2_start_subfile (char *, const char *, const char *);
1415 static void dwarf2_start_symtab (struct dwarf2_cu *,
1416 const char *, const char *, CORE_ADDR);
1418 static struct symbol *new_symbol (struct die_info *, struct type *,
1419 struct dwarf2_cu *);
1421 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1422 struct dwarf2_cu *, struct symbol *);
1424 static void dwarf2_const_value (struct attribute *, struct symbol *,
1425 struct dwarf2_cu *);
1427 static void dwarf2_const_value_attr (struct attribute *attr,
1430 struct obstack *obstack,
1431 struct dwarf2_cu *cu, LONGEST *value,
1433 struct dwarf2_locexpr_baton **baton);
1435 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1437 static int need_gnat_info (struct dwarf2_cu *);
1439 static struct type *die_descriptive_type (struct die_info *,
1440 struct dwarf2_cu *);
1442 static void set_descriptive_type (struct type *, struct die_info *,
1443 struct dwarf2_cu *);
1445 static struct type *die_containing_type (struct die_info *,
1446 struct dwarf2_cu *);
1448 static struct type *lookup_die_type (struct die_info *, struct attribute *,
1449 struct dwarf2_cu *);
1451 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1453 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1455 static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1457 static char *typename_concat (struct obstack *obs, const char *prefix,
1458 const char *suffix, int physname,
1459 struct dwarf2_cu *cu);
1461 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1463 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1465 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1467 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1469 static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu);
1471 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1472 struct dwarf2_cu *, struct partial_symtab *);
1474 static int dwarf2_get_pc_bounds (struct die_info *,
1475 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1476 struct partial_symtab *);
1478 static void get_scope_pc_bounds (struct die_info *,
1479 CORE_ADDR *, CORE_ADDR *,
1480 struct dwarf2_cu *);
1482 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1483 CORE_ADDR, struct dwarf2_cu *);
1485 static void dwarf2_add_field (struct field_info *, struct die_info *,
1486 struct dwarf2_cu *);
1488 static void dwarf2_attach_fields_to_type (struct field_info *,
1489 struct type *, struct dwarf2_cu *);
1491 static void dwarf2_add_member_fn (struct field_info *,
1492 struct die_info *, struct type *,
1493 struct dwarf2_cu *);
1495 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1497 struct dwarf2_cu *);
1499 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1501 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1503 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1505 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1507 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1509 static struct type *read_module_type (struct die_info *die,
1510 struct dwarf2_cu *cu);
1512 static const char *namespace_name (struct die_info *die,
1513 int *is_anonymous, struct dwarf2_cu *);
1515 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1517 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1519 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1520 struct dwarf2_cu *);
1522 static struct die_info *read_die_and_children (const struct die_reader_specs *,
1524 gdb_byte **new_info_ptr,
1525 struct die_info *parent);
1527 static struct die_info *read_die_and_siblings (const struct die_reader_specs *,
1529 gdb_byte **new_info_ptr,
1530 struct die_info *parent);
1532 static gdb_byte *read_full_die_1 (const struct die_reader_specs *,
1533 struct die_info **, gdb_byte *, int *, int);
1535 static gdb_byte *read_full_die (const struct die_reader_specs *,
1536 struct die_info **, gdb_byte *, int *);
1538 static void process_die (struct die_info *, struct dwarf2_cu *);
1540 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *,
1543 static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1545 static const char *dwarf2_full_name (const char *name,
1546 struct die_info *die,
1547 struct dwarf2_cu *cu);
1549 static struct die_info *dwarf2_extension (struct die_info *die,
1550 struct dwarf2_cu **);
1552 static const char *dwarf_tag_name (unsigned int);
1554 static const char *dwarf_attr_name (unsigned int);
1556 static const char *dwarf_form_name (unsigned int);
1558 static char *dwarf_bool_name (unsigned int);
1560 static const char *dwarf_type_encoding_name (unsigned int);
1562 static struct die_info *sibling_die (struct die_info *);
1564 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1566 static void dump_die_for_error (struct die_info *);
1568 static void dump_die_1 (struct ui_file *, int level, int max_level,
1571 /*static*/ void dump_die (struct die_info *, int max_level);
1573 static void store_in_ref_table (struct die_info *,
1574 struct dwarf2_cu *);
1576 static int is_ref_attr (struct attribute *);
1578 static sect_offset dwarf2_get_ref_die_offset (struct attribute *);
1580 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1582 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1584 struct dwarf2_cu **);
1586 static struct die_info *follow_die_ref (struct die_info *,
1588 struct dwarf2_cu **);
1590 static struct die_info *follow_die_sig (struct die_info *,
1592 struct dwarf2_cu **);
1594 static struct signatured_type *lookup_signatured_type_at_offset
1595 (struct objfile *objfile,
1596 struct dwarf2_section_info *section, sect_offset offset);
1598 static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu);
1600 static void read_signatured_type (struct signatured_type *);
1602 static struct type_unit_group *get_type_unit_group
1603 (struct dwarf2_cu *, struct attribute *);
1605 static void build_type_unit_groups (die_reader_func_ftype *, void *);
1607 /* memory allocation interface */
1609 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1611 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1613 static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int,
1616 static int attr_form_is_block (struct attribute *);
1618 static int attr_form_is_section_offset (struct attribute *);
1620 static int attr_form_is_constant (struct attribute *);
1622 static void fill_in_loclist_baton (struct dwarf2_cu *cu,
1623 struct dwarf2_loclist_baton *baton,
1624 struct attribute *attr);
1626 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1628 struct dwarf2_cu *cu);
1630 static gdb_byte *skip_one_die (const struct die_reader_specs *reader,
1632 struct abbrev_info *abbrev);
1634 static void free_stack_comp_unit (void *);
1636 static hashval_t partial_die_hash (const void *item);
1638 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1640 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1641 (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile);
1643 static void init_one_comp_unit (struct dwarf2_cu *cu,
1644 struct dwarf2_per_cu_data *per_cu);
1646 static void prepare_one_comp_unit (struct dwarf2_cu *cu,
1647 struct die_info *comp_unit_die,
1648 enum language pretend_language);
1650 static void free_heap_comp_unit (void *);
1652 static void free_cached_comp_units (void *);
1654 static void age_cached_comp_units (void);
1656 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *);
1658 static struct type *set_die_type (struct die_info *, struct type *,
1659 struct dwarf2_cu *);
1661 static void create_all_comp_units (struct objfile *);
1663 static int create_all_type_units (struct objfile *);
1665 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1668 static void process_full_comp_unit (struct dwarf2_per_cu_data *,
1671 static void process_full_type_unit (struct dwarf2_per_cu_data *,
1674 static void dwarf2_add_dependence (struct dwarf2_cu *,
1675 struct dwarf2_per_cu_data *);
1677 static void dwarf2_mark (struct dwarf2_cu *);
1679 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1681 static struct type *get_die_type_at_offset (sect_offset,
1682 struct dwarf2_per_cu_data *per_cu);
1684 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1686 static void dwarf2_release_queue (void *dummy);
1688 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1689 enum language pretend_language);
1691 static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
1692 struct dwarf2_per_cu_data *per_cu,
1693 enum language pretend_language);
1695 static void process_queue (void);
1697 static void find_file_and_directory (struct die_info *die,
1698 struct dwarf2_cu *cu,
1699 const char **name, const char **comp_dir);
1701 static char *file_full_name (int file, struct line_header *lh,
1702 const char *comp_dir);
1704 static gdb_byte *read_and_check_comp_unit_head
1705 (struct comp_unit_head *header,
1706 struct dwarf2_section_info *section,
1707 struct dwarf2_section_info *abbrev_section, gdb_byte *info_ptr,
1708 int is_debug_types_section);
1710 static void init_cutu_and_read_dies
1711 (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table,
1712 int use_existing_cu, int keep,
1713 die_reader_func_ftype *die_reader_func, void *data);
1715 static void init_cutu_and_read_dies_simple
1716 (struct dwarf2_per_cu_data *this_cu,
1717 die_reader_func_ftype *die_reader_func, void *data);
1719 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1721 static htab_t allocate_dwo_unit_table (struct objfile *objfile);
1723 static struct dwo_unit *lookup_dwo_comp_unit
1724 (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST);
1726 static struct dwo_unit *lookup_dwo_type_unit
1727 (struct signatured_type *, const char *, const char *);
1729 static void free_dwo_file_cleanup (void *);
1731 static void process_cu_includes (void);
1733 static void check_producer (struct dwarf2_cu *cu);
1737 /* Convert VALUE between big- and little-endian. */
1739 byte_swap (offset_type value)
1743 result = (value & 0xff) << 24;
1744 result |= (value & 0xff00) << 8;
1745 result |= (value & 0xff0000) >> 8;
1746 result |= (value & 0xff000000) >> 24;
1750 #define MAYBE_SWAP(V) byte_swap (V)
1753 #define MAYBE_SWAP(V) (V)
1754 #endif /* WORDS_BIGENDIAN */
1756 /* The suffix for an index file. */
1757 #define INDEX_SUFFIX ".gdb-index"
1759 static const char *dwarf2_physname (const char *name, struct die_info *die,
1760 struct dwarf2_cu *cu);
1762 /* Try to locate the sections we need for DWARF 2 debugging
1763 information and return true if we have enough to do something.
1764 NAMES points to the dwarf2 section names, or is NULL if the standard
1765 ELF names are used. */
1768 dwarf2_has_info (struct objfile *objfile,
1769 const struct dwarf2_debug_sections *names)
1771 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1772 if (!dwarf2_per_objfile)
1774 /* Initialize per-objfile state. */
1775 struct dwarf2_per_objfile *data
1776 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1778 memset (data, 0, sizeof (*data));
1779 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1780 dwarf2_per_objfile = data;
1782 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections,
1784 dwarf2_per_objfile->objfile = objfile;
1786 return (dwarf2_per_objfile->info.asection != NULL
1787 && dwarf2_per_objfile->abbrev.asection != NULL);
1790 /* When loading sections, we look either for uncompressed section or for
1791 compressed section names. */
1794 section_is_p (const char *section_name,
1795 const struct dwarf2_section_names *names)
1797 if (names->normal != NULL
1798 && strcmp (section_name, names->normal) == 0)
1800 if (names->compressed != NULL
1801 && strcmp (section_name, names->compressed) == 0)
1806 /* This function is mapped across the sections and remembers the
1807 offset and size of each of the debugging sections we are interested
1811 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames)
1813 const struct dwarf2_debug_sections *names;
1814 flagword aflag = bfd_get_section_flags (abfd, sectp);
1817 names = &dwarf2_elf_names;
1819 names = (const struct dwarf2_debug_sections *) vnames;
1821 if ((aflag & SEC_HAS_CONTENTS) == 0)
1824 else if (section_is_p (sectp->name, &names->info))
1826 dwarf2_per_objfile->info.asection = sectp;
1827 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1829 else if (section_is_p (sectp->name, &names->abbrev))
1831 dwarf2_per_objfile->abbrev.asection = sectp;
1832 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1834 else if (section_is_p (sectp->name, &names->line))
1836 dwarf2_per_objfile->line.asection = sectp;
1837 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1839 else if (section_is_p (sectp->name, &names->loc))
1841 dwarf2_per_objfile->loc.asection = sectp;
1842 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1844 else if (section_is_p (sectp->name, &names->macinfo))
1846 dwarf2_per_objfile->macinfo.asection = sectp;
1847 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1849 else if (section_is_p (sectp->name, &names->macro))
1851 dwarf2_per_objfile->macro.asection = sectp;
1852 dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp);
1854 else if (section_is_p (sectp->name, &names->str))
1856 dwarf2_per_objfile->str.asection = sectp;
1857 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1859 else if (section_is_p (sectp->name, &names->addr))
1861 dwarf2_per_objfile->addr.asection = sectp;
1862 dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp);
1864 else if (section_is_p (sectp->name, &names->frame))
1866 dwarf2_per_objfile->frame.asection = sectp;
1867 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1869 else if (section_is_p (sectp->name, &names->eh_frame))
1871 dwarf2_per_objfile->eh_frame.asection = sectp;
1872 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1874 else if (section_is_p (sectp->name, &names->ranges))
1876 dwarf2_per_objfile->ranges.asection = sectp;
1877 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1879 else if (section_is_p (sectp->name, &names->types))
1881 struct dwarf2_section_info type_section;
1883 memset (&type_section, 0, sizeof (type_section));
1884 type_section.asection = sectp;
1885 type_section.size = bfd_get_section_size (sectp);
1887 VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types,
1890 else if (section_is_p (sectp->name, &names->gdb_index))
1892 dwarf2_per_objfile->gdb_index.asection = sectp;
1893 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1896 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1897 && bfd_section_vma (abfd, sectp) == 0)
1898 dwarf2_per_objfile->has_section_at_zero = 1;
1901 /* A helper function that decides whether a section is empty,
1905 dwarf2_section_empty_p (struct dwarf2_section_info *info)
1907 return info->asection == NULL || info->size == 0;
1910 /* Read the contents of the section INFO.
1911 OBJFILE is the main object file, but not necessarily the file where
1912 the section comes from. E.g., for DWO files INFO->asection->owner
1913 is the bfd of the DWO file.
1914 If the section is compressed, uncompress it before returning. */
1917 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1919 asection *sectp = info->asection;
1921 gdb_byte *buf, *retbuf;
1922 unsigned char header[4];
1926 info->buffer = NULL;
1929 if (dwarf2_section_empty_p (info))
1932 abfd = sectp->owner;
1934 /* If the section has relocations, we must read it ourselves.
1935 Otherwise we attach it to the BFD. */
1936 if ((sectp->flags & SEC_RELOC) == 0)
1938 const gdb_byte *bytes = gdb_bfd_map_section (sectp, &info->size);
1940 /* We have to cast away const here for historical reasons.
1941 Fixing dwarf2read to be const-correct would be quite nice. */
1942 info->buffer = (gdb_byte *) bytes;
1946 buf = obstack_alloc (&objfile->objfile_obstack, info->size);
1949 /* When debugging .o files, we may need to apply relocations; see
1950 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1951 We never compress sections in .o files, so we only need to
1952 try this when the section is not compressed. */
1953 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1956 info->buffer = retbuf;
1960 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1961 || bfd_bread (buf, info->size, abfd) != info->size)
1962 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1963 bfd_get_filename (abfd));
1966 /* A helper function that returns the size of a section in a safe way.
1967 If you are positive that the section has been read before using the
1968 size, then it is safe to refer to the dwarf2_section_info object's
1969 "size" field directly. In other cases, you must call this
1970 function, because for compressed sections the size field is not set
1971 correctly until the section has been read. */
1973 static bfd_size_type
1974 dwarf2_section_size (struct objfile *objfile,
1975 struct dwarf2_section_info *info)
1978 dwarf2_read_section (objfile, info);
1982 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1986 dwarf2_get_section_info (struct objfile *objfile,
1987 enum dwarf2_section_enum sect,
1988 asection **sectp, gdb_byte **bufp,
1989 bfd_size_type *sizep)
1991 struct dwarf2_per_objfile *data
1992 = objfile_data (objfile, dwarf2_objfile_data_key);
1993 struct dwarf2_section_info *info;
1995 /* We may see an objfile without any DWARF, in which case we just
2006 case DWARF2_DEBUG_FRAME:
2007 info = &data->frame;
2009 case DWARF2_EH_FRAME:
2010 info = &data->eh_frame;
2013 gdb_assert_not_reached ("unexpected section");
2016 dwarf2_read_section (objfile, info);
2018 *sectp = info->asection;
2019 *bufp = info->buffer;
2020 *sizep = info->size;
2023 /* A helper function to find the sections for a .dwz file. */
2026 locate_dwz_sections (bfd *abfd, asection *sectp, void *arg)
2028 struct dwz_file *dwz_file = arg;
2030 /* Note that we only support the standard ELF names, because .dwz
2031 is ELF-only (at the time of writing). */
2032 if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev))
2034 dwz_file->abbrev.asection = sectp;
2035 dwz_file->abbrev.size = bfd_get_section_size (sectp);
2037 else if (section_is_p (sectp->name, &dwarf2_elf_names.info))
2039 dwz_file->info.asection = sectp;
2040 dwz_file->info.size = bfd_get_section_size (sectp);
2042 else if (section_is_p (sectp->name, &dwarf2_elf_names.str))
2044 dwz_file->str.asection = sectp;
2045 dwz_file->str.size = bfd_get_section_size (sectp);
2047 else if (section_is_p (sectp->name, &dwarf2_elf_names.line))
2049 dwz_file->line.asection = sectp;
2050 dwz_file->line.size = bfd_get_section_size (sectp);
2052 else if (section_is_p (sectp->name, &dwarf2_elf_names.macro))
2054 dwz_file->macro.asection = sectp;
2055 dwz_file->macro.size = bfd_get_section_size (sectp);
2057 else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index))
2059 dwz_file->gdb_index.asection = sectp;
2060 dwz_file->gdb_index.size = bfd_get_section_size (sectp);
2064 /* Open the separate '.dwz' debug file, if needed. Error if the file
2067 static struct dwz_file *
2068 dwarf2_get_dwz_file (void)
2070 bfd *abfd, *dwz_bfd;
2073 struct cleanup *cleanup;
2074 const char *filename;
2075 struct dwz_file *result;
2077 if (dwarf2_per_objfile->dwz_file != NULL)
2078 return dwarf2_per_objfile->dwz_file;
2080 abfd = dwarf2_per_objfile->objfile->obfd;
2081 section = bfd_get_section_by_name (abfd, ".gnu_debugaltlink");
2082 if (section == NULL)
2083 error (_("could not find '.gnu_debugaltlink' section"));
2084 if (!bfd_malloc_and_get_section (abfd, section, &data))
2085 error (_("could not read '.gnu_debugaltlink' section: %s"),
2086 bfd_errmsg (bfd_get_error ()));
2087 cleanup = make_cleanup (xfree, data);
2090 if (!IS_ABSOLUTE_PATH (filename))
2092 char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name);
2095 make_cleanup (xfree, abs);
2096 abs = ldirname (abs);
2097 make_cleanup (xfree, abs);
2099 rel = concat (abs, SLASH_STRING, filename, (char *) NULL);
2100 make_cleanup (xfree, rel);
2104 /* The format is just a NUL-terminated file name, followed by the
2105 build-id. For now, though, we ignore the build-id. */
2106 dwz_bfd = gdb_bfd_open (filename, gnutarget, -1);
2107 if (dwz_bfd == NULL)
2108 error (_("could not read '%s': %s"), filename,
2109 bfd_errmsg (bfd_get_error ()));
2111 if (!bfd_check_format (dwz_bfd, bfd_object))
2113 gdb_bfd_unref (dwz_bfd);
2114 error (_("file '%s' was not usable: %s"), filename,
2115 bfd_errmsg (bfd_get_error ()));
2118 result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack,
2120 result->dwz_bfd = dwz_bfd;
2122 bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result);
2124 do_cleanups (cleanup);
2126 dwarf2_per_objfile->dwz_file = result;
2130 /* DWARF quick_symbols_functions support. */
2132 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2133 unique line tables, so we maintain a separate table of all .debug_line
2134 derived entries to support the sharing.
2135 All the quick functions need is the list of file names. We discard the
2136 line_header when we're done and don't need to record it here. */
2137 struct quick_file_names
2139 /* The data used to construct the hash key. */
2140 struct stmt_list_hash hash;
2142 /* The number of entries in file_names, real_names. */
2143 unsigned int num_file_names;
2145 /* The file names from the line table, after being run through
2147 const char **file_names;
2149 /* The file names from the line table after being run through
2150 gdb_realpath. These are computed lazily. */
2151 const char **real_names;
2154 /* When using the index (and thus not using psymtabs), each CU has an
2155 object of this type. This is used to hold information needed by
2156 the various "quick" methods. */
2157 struct dwarf2_per_cu_quick_data
2159 /* The file table. This can be NULL if there was no file table
2160 or it's currently not read in.
2161 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2162 struct quick_file_names *file_names;
2164 /* The corresponding symbol table. This is NULL if symbols for this
2165 CU have not yet been read. */
2166 struct symtab *symtab;
2168 /* A temporary mark bit used when iterating over all CUs in
2169 expand_symtabs_matching. */
2170 unsigned int mark : 1;
2172 /* True if we've tried to read the file table and found there isn't one.
2173 There will be no point in trying to read it again next time. */
2174 unsigned int no_file_data : 1;
2177 /* Utility hash function for a stmt_list_hash. */
2180 hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash)
2184 if (stmt_list_hash->dwo_unit != NULL)
2185 v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file;
2186 v += stmt_list_hash->line_offset.sect_off;
2190 /* Utility equality function for a stmt_list_hash. */
2193 eq_stmt_list_entry (const struct stmt_list_hash *lhs,
2194 const struct stmt_list_hash *rhs)
2196 if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL))
2198 if (lhs->dwo_unit != NULL
2199 && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file)
2202 return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
2205 /* Hash function for a quick_file_names. */
2208 hash_file_name_entry (const void *e)
2210 const struct quick_file_names *file_data = e;
2212 return hash_stmt_list_entry (&file_data->hash);
2215 /* Equality function for a quick_file_names. */
2218 eq_file_name_entry (const void *a, const void *b)
2220 const struct quick_file_names *ea = a;
2221 const struct quick_file_names *eb = b;
2223 return eq_stmt_list_entry (&ea->hash, &eb->hash);
2226 /* Delete function for a quick_file_names. */
2229 delete_file_name_entry (void *e)
2231 struct quick_file_names *file_data = e;
2234 for (i = 0; i < file_data->num_file_names; ++i)
2236 xfree ((void*) file_data->file_names[i]);
2237 if (file_data->real_names)
2238 xfree ((void*) file_data->real_names[i]);
2241 /* The space for the struct itself lives on objfile_obstack,
2242 so we don't free it here. */
2245 /* Create a quick_file_names hash table. */
2248 create_quick_file_names_table (unsigned int nr_initial_entries)
2250 return htab_create_alloc (nr_initial_entries,
2251 hash_file_name_entry, eq_file_name_entry,
2252 delete_file_name_entry, xcalloc, xfree);
2255 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2256 have to be created afterwards. You should call age_cached_comp_units after
2257 processing PER_CU->CU. dw2_setup must have been already called. */
2260 load_cu (struct dwarf2_per_cu_data *per_cu)
2262 if (per_cu->is_debug_types)
2263 load_full_type_unit (per_cu);
2265 load_full_comp_unit (per_cu, language_minimal);
2267 gdb_assert (per_cu->cu != NULL);
2269 dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu);
2272 /* Read in the symbols for PER_CU. */
2275 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2277 struct cleanup *back_to;
2279 /* Skip type_unit_groups, reading the type units they contain
2280 is handled elsewhere. */
2281 if (IS_TYPE_UNIT_GROUP (per_cu))
2284 back_to = make_cleanup (dwarf2_release_queue, NULL);
2286 if (dwarf2_per_objfile->using_index
2287 ? per_cu->v.quick->symtab == NULL
2288 : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin))
2290 queue_comp_unit (per_cu, language_minimal);
2296 /* Age the cache, releasing compilation units that have not
2297 been used recently. */
2298 age_cached_comp_units ();
2300 do_cleanups (back_to);
2303 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2304 the objfile from which this CU came. Returns the resulting symbol
2307 static struct symtab *
2308 dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2310 gdb_assert (dwarf2_per_objfile->using_index);
2311 if (!per_cu->v.quick->symtab)
2313 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
2314 increment_reading_symtab ();
2315 dw2_do_instantiate_symtab (per_cu);
2316 process_cu_includes ();
2317 do_cleanups (back_to);
2319 return per_cu->v.quick->symtab;
2322 /* Return the CU given its index.
2324 This is intended for loops like:
2326 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2327 + dwarf2_per_objfile->n_type_units); ++i)
2329 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2335 static struct dwarf2_per_cu_data *
2336 dw2_get_cu (int index)
2338 if (index >= dwarf2_per_objfile->n_comp_units)
2340 index -= dwarf2_per_objfile->n_comp_units;
2341 gdb_assert (index < dwarf2_per_objfile->n_type_units);
2342 return &dwarf2_per_objfile->all_type_units[index]->per_cu;
2345 return dwarf2_per_objfile->all_comp_units[index];
2348 /* Return the primary CU given its index.
2349 The difference between this function and dw2_get_cu is in the handling
2350 of type units (TUs). Here we return the type_unit_group object.
2352 This is intended for loops like:
2354 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2355 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2357 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2363 static struct dwarf2_per_cu_data *
2364 dw2_get_primary_cu (int index)
2366 if (index >= dwarf2_per_objfile->n_comp_units)
2368 index -= dwarf2_per_objfile->n_comp_units;
2369 gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups);
2370 return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu;
2373 return dwarf2_per_objfile->all_comp_units[index];
2376 /* A helper for create_cus_from_index that handles a given list of
2380 create_cus_from_index_list (struct objfile *objfile,
2381 const gdb_byte *cu_list, offset_type n_elements,
2382 struct dwarf2_section_info *section,
2388 for (i = 0; i < n_elements; i += 2)
2390 struct dwarf2_per_cu_data *the_cu;
2391 ULONGEST offset, length;
2393 gdb_static_assert (sizeof (ULONGEST) >= 8);
2394 offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE);
2395 length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE);
2398 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2399 struct dwarf2_per_cu_data);
2400 the_cu->offset.sect_off = offset;
2401 the_cu->length = length;
2402 the_cu->objfile = objfile;
2403 the_cu->info_or_types_section = section;
2404 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2405 struct dwarf2_per_cu_quick_data);
2406 the_cu->is_dwz = is_dwz;
2407 dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu;
2411 /* Read the CU list from the mapped index, and use it to create all
2412 the CU objects for this objfile. */
2415 create_cus_from_index (struct objfile *objfile,
2416 const gdb_byte *cu_list, offset_type cu_list_elements,
2417 const gdb_byte *dwz_list, offset_type dwz_elements)
2419 struct dwz_file *dwz;
2421 dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2;
2422 dwarf2_per_objfile->all_comp_units
2423 = obstack_alloc (&objfile->objfile_obstack,
2424 dwarf2_per_objfile->n_comp_units
2425 * sizeof (struct dwarf2_per_cu_data *));
2427 create_cus_from_index_list (objfile, cu_list, cu_list_elements,
2428 &dwarf2_per_objfile->info, 0, 0);
2430 if (dwz_elements == 0)
2433 dwz = dwarf2_get_dwz_file ();
2434 create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1,
2435 cu_list_elements / 2);
2438 /* Create the signatured type hash table from the index. */
2441 create_signatured_type_table_from_index (struct objfile *objfile,
2442 struct dwarf2_section_info *section,
2443 const gdb_byte *bytes,
2444 offset_type elements)
2447 htab_t sig_types_hash;
2449 dwarf2_per_objfile->n_type_units = elements / 3;
2450 dwarf2_per_objfile->all_type_units
2451 = obstack_alloc (&objfile->objfile_obstack,
2452 dwarf2_per_objfile->n_type_units
2453 * sizeof (struct signatured_type *));
2455 sig_types_hash = allocate_signatured_type_table (objfile);
2457 for (i = 0; i < elements; i += 3)
2459 struct signatured_type *sig_type;
2460 ULONGEST offset, type_offset_in_tu, signature;
2463 gdb_static_assert (sizeof (ULONGEST) >= 8);
2464 offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
2465 type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8,
2467 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
2470 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2471 struct signatured_type);
2472 sig_type->signature = signature;
2473 sig_type->type_offset_in_tu.cu_off = type_offset_in_tu;
2474 sig_type->per_cu.is_debug_types = 1;
2475 sig_type->per_cu.info_or_types_section = section;
2476 sig_type->per_cu.offset.sect_off = offset;
2477 sig_type->per_cu.objfile = objfile;
2478 sig_type->per_cu.v.quick
2479 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2480 struct dwarf2_per_cu_quick_data);
2482 slot = htab_find_slot (sig_types_hash, sig_type, INSERT);
2485 dwarf2_per_objfile->all_type_units[i / 3] = sig_type;
2488 dwarf2_per_objfile->signatured_types = sig_types_hash;
2491 /* Read the address map data from the mapped index, and use it to
2492 populate the objfile's psymtabs_addrmap. */
2495 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
2497 const gdb_byte *iter, *end;
2498 struct obstack temp_obstack;
2499 struct addrmap *mutable_map;
2500 struct cleanup *cleanup;
2503 obstack_init (&temp_obstack);
2504 cleanup = make_cleanup_obstack_free (&temp_obstack);
2505 mutable_map = addrmap_create_mutable (&temp_obstack);
2507 iter = index->address_table;
2508 end = iter + index->address_table_size;
2510 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2514 ULONGEST hi, lo, cu_index;
2515 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2517 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2519 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
2522 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
2523 dw2_get_cu (cu_index));
2526 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
2527 &objfile->objfile_obstack);
2528 do_cleanups (cleanup);
2531 /* The hash function for strings in the mapped index. This is the same as
2532 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2533 implementation. This is necessary because the hash function is tied to the
2534 format of the mapped index file. The hash values do not have to match with
2537 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2540 mapped_index_string_hash (int index_version, const void *p)
2542 const unsigned char *str = (const unsigned char *) p;
2546 while ((c = *str++) != 0)
2548 if (index_version >= 5)
2550 r = r * 67 + c - 113;
2556 /* Find a slot in the mapped index INDEX for the object named NAME.
2557 If NAME is found, set *VEC_OUT to point to the CU vector in the
2558 constant pool and return 1. If NAME cannot be found, return 0. */
2561 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
2562 offset_type **vec_out)
2564 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2566 offset_type slot, step;
2567 int (*cmp) (const char *, const char *);
2569 if (current_language->la_language == language_cplus
2570 || current_language->la_language == language_java
2571 || current_language->la_language == language_fortran)
2573 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2575 const char *paren = strchr (name, '(');
2581 dup = xmalloc (paren - name + 1);
2582 memcpy (dup, name, paren - name);
2583 dup[paren - name] = 0;
2585 make_cleanup (xfree, dup);
2590 /* Index version 4 did not support case insensitive searches. But the
2591 indices for case insensitive languages are built in lowercase, therefore
2592 simulate our NAME being searched is also lowercased. */
2593 hash = mapped_index_string_hash ((index->version == 4
2594 && case_sensitivity == case_sensitive_off
2595 ? 5 : index->version),
2598 slot = hash & (index->symbol_table_slots - 1);
2599 step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1;
2600 cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp);
2604 /* Convert a slot number to an offset into the table. */
2605 offset_type i = 2 * slot;
2607 if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0)
2609 do_cleanups (back_to);
2613 str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]);
2614 if (!cmp (name, str))
2616 *vec_out = (offset_type *) (index->constant_pool
2617 + MAYBE_SWAP (index->symbol_table[i + 1]));
2618 do_cleanups (back_to);
2622 slot = (slot + step) & (index->symbol_table_slots - 1);
2626 /* A helper function that reads the .gdb_index from SECTION and fills
2627 in MAP. FILENAME is the name of the file containing the section;
2628 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2629 ok to use deprecated sections.
2631 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2632 out parameters that are filled in with information about the CU and
2633 TU lists in the section.
2635 Returns 1 if all went well, 0 otherwise. */
2638 read_index_from_section (struct objfile *objfile,
2639 const char *filename,
2641 struct dwarf2_section_info *section,
2642 struct mapped_index *map,
2643 const gdb_byte **cu_list,
2644 offset_type *cu_list_elements,
2645 const gdb_byte **types_list,
2646 offset_type *types_list_elements)
2649 offset_type version;
2650 offset_type *metadata;
2653 if (dwarf2_section_empty_p (section))
2656 /* Older elfutils strip versions could keep the section in the main
2657 executable while splitting it for the separate debug info file. */
2658 if ((bfd_get_file_flags (section->asection) & SEC_HAS_CONTENTS) == 0)
2661 dwarf2_read_section (objfile, section);
2663 addr = section->buffer;
2664 /* Version check. */
2665 version = MAYBE_SWAP (*(offset_type *) addr);
2666 /* Versions earlier than 3 emitted every copy of a psymbol. This
2667 causes the index to behave very poorly for certain requests. Version 3
2668 contained incomplete addrmap. So, it seems better to just ignore such
2672 static int warning_printed = 0;
2673 if (!warning_printed)
2675 warning (_("Skipping obsolete .gdb_index section in %s."),
2677 warning_printed = 1;
2681 /* Index version 4 uses a different hash function than index version
2684 Versions earlier than 6 did not emit psymbols for inlined
2685 functions. Using these files will cause GDB not to be able to
2686 set breakpoints on inlined functions by name, so we ignore these
2687 indices unless the user has done
2688 "set use-deprecated-index-sections on". */
2689 if (version < 6 && !deprecated_ok)
2691 static int warning_printed = 0;
2692 if (!warning_printed)
2695 Skipping deprecated .gdb_index section in %s.\n\
2696 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2697 to use the section anyway."),
2699 warning_printed = 1;
2703 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2704 of the TU (for symbols coming from TUs). It's just a performance bug, and
2705 we can't distinguish gdb-generated indices from gold-generated ones, so
2706 nothing to do here. */
2708 /* Indexes with higher version than the one supported by GDB may be no
2709 longer backward compatible. */
2713 map->version = version;
2714 map->total_size = section->size;
2716 metadata = (offset_type *) (addr + sizeof (offset_type));
2719 *cu_list = addr + MAYBE_SWAP (metadata[i]);
2720 *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
2724 *types_list = addr + MAYBE_SWAP (metadata[i]);
2725 *types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
2726 - MAYBE_SWAP (metadata[i]))
2730 map->address_table = addr + MAYBE_SWAP (metadata[i]);
2731 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
2732 - MAYBE_SWAP (metadata[i]));
2735 map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
2736 map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1])
2737 - MAYBE_SWAP (metadata[i]))
2738 / (2 * sizeof (offset_type)));
2741 map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
2747 /* Read the index file. If everything went ok, initialize the "quick"
2748 elements of all the CUs and return 1. Otherwise, return 0. */
2751 dwarf2_read_index (struct objfile *objfile)
2753 struct mapped_index local_map, *map;
2754 const gdb_byte *cu_list, *types_list, *dwz_list = NULL;
2755 offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0;
2757 if (!read_index_from_section (objfile, objfile->name,
2758 use_deprecated_index_sections,
2759 &dwarf2_per_objfile->gdb_index, &local_map,
2760 &cu_list, &cu_list_elements,
2761 &types_list, &types_list_elements))
2764 /* Don't use the index if it's empty. */
2765 if (local_map.symbol_table_slots == 0)
2768 /* If there is a .dwz file, read it so we can get its CU list as
2770 if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL)
2772 struct dwz_file *dwz = dwarf2_get_dwz_file ();
2773 struct mapped_index dwz_map;
2774 const gdb_byte *dwz_types_ignore;
2775 offset_type dwz_types_elements_ignore;
2777 if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd),
2779 &dwz->gdb_index, &dwz_map,
2780 &dwz_list, &dwz_list_elements,
2782 &dwz_types_elements_ignore))
2784 warning (_("could not read '.gdb_index' section from %s; skipping"),
2785 bfd_get_filename (dwz->dwz_bfd));
2790 create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list,
2793 if (types_list_elements)
2795 struct dwarf2_section_info *section;
2797 /* We can only handle a single .debug_types when we have an
2799 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1)
2802 section = VEC_index (dwarf2_section_info_def,
2803 dwarf2_per_objfile->types, 0);
2805 create_signatured_type_table_from_index (objfile, section, types_list,
2806 types_list_elements);
2809 create_addrmap_from_index (objfile, &local_map);
2811 map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index));
2814 dwarf2_per_objfile->index_table = map;
2815 dwarf2_per_objfile->using_index = 1;
2816 dwarf2_per_objfile->quick_file_names_table =
2817 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
2822 /* A helper for the "quick" functions which sets the global
2823 dwarf2_per_objfile according to OBJFILE. */
2826 dw2_setup (struct objfile *objfile)
2828 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
2829 gdb_assert (dwarf2_per_objfile);
2832 /* die_reader_func for dw2_get_file_names. */
2835 dw2_get_file_names_reader (const struct die_reader_specs *reader,
2837 struct die_info *comp_unit_die,
2841 struct dwarf2_cu *cu = reader->cu;
2842 struct dwarf2_per_cu_data *this_cu = cu->per_cu;
2843 struct objfile *objfile = dwarf2_per_objfile->objfile;
2844 struct dwarf2_per_cu_data *lh_cu;
2845 struct line_header *lh;
2846 struct attribute *attr;
2848 const char *name, *comp_dir;
2850 struct quick_file_names *qfn;
2851 unsigned int line_offset;
2853 /* Our callers never want to match partial units -- instead they
2854 will match the enclosing full CU. */
2855 if (comp_unit_die->tag == DW_TAG_partial_unit)
2857 this_cu->v.quick->no_file_data = 1;
2861 /* If we're reading the line header for TUs, store it in the "per_cu"
2863 if (this_cu->is_debug_types)
2865 struct type_unit_group *tu_group = data;
2867 gdb_assert (tu_group != NULL);
2868 lh_cu = &tu_group->per_cu;
2877 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
2880 struct quick_file_names find_entry;
2882 line_offset = DW_UNSND (attr);
2884 /* We may have already read in this line header (TU line header sharing).
2885 If we have we're done. */
2886 find_entry.hash.dwo_unit = cu->dwo_unit;
2887 find_entry.hash.line_offset.sect_off = line_offset;
2888 slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
2889 &find_entry, INSERT);
2892 lh_cu->v.quick->file_names = *slot;
2896 lh = dwarf_decode_line_header (line_offset, cu);
2900 lh_cu->v.quick->no_file_data = 1;
2904 qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
2905 qfn->hash.dwo_unit = cu->dwo_unit;
2906 qfn->hash.line_offset.sect_off = line_offset;
2907 gdb_assert (slot != NULL);
2910 find_file_and_directory (comp_unit_die, cu, &name, &comp_dir);
2912 qfn->num_file_names = lh->num_file_names;
2913 qfn->file_names = obstack_alloc (&objfile->objfile_obstack,
2914 lh->num_file_names * sizeof (char *));
2915 for (i = 0; i < lh->num_file_names; ++i)
2916 qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir);
2917 qfn->real_names = NULL;
2919 free_line_header (lh);
2921 lh_cu->v.quick->file_names = qfn;
2924 /* A helper for the "quick" functions which attempts to read the line
2925 table for THIS_CU. */
2927 static struct quick_file_names *
2928 dw2_get_file_names (struct objfile *objfile,
2929 struct dwarf2_per_cu_data *this_cu)
2931 /* For TUs this should only be called on the parent group. */
2932 if (this_cu->is_debug_types)
2933 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu));
2935 if (this_cu->v.quick->file_names != NULL)
2936 return this_cu->v.quick->file_names;
2937 /* If we know there is no line data, no point in looking again. */
2938 if (this_cu->v.quick->no_file_data)
2941 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2942 in the stub for CUs, there's is no need to lookup the DWO file.
2943 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2945 if (this_cu->is_debug_types)
2947 struct type_unit_group *tu_group = this_cu->type_unit_group;
2949 init_cutu_and_read_dies (tu_group->t.first_tu, NULL, 0, 0,
2950 dw2_get_file_names_reader, tu_group);
2953 init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
2955 if (this_cu->v.quick->no_file_data)
2957 return this_cu->v.quick->file_names;
2960 /* A helper for the "quick" functions which computes and caches the
2961 real path for a given file name from the line table. */
2964 dw2_get_real_path (struct objfile *objfile,
2965 struct quick_file_names *qfn, int index)
2967 if (qfn->real_names == NULL)
2968 qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
2969 qfn->num_file_names, sizeof (char *));
2971 if (qfn->real_names[index] == NULL)
2972 qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
2974 return qfn->real_names[index];
2977 static struct symtab *
2978 dw2_find_last_source_symtab (struct objfile *objfile)
2982 dw2_setup (objfile);
2983 index = dwarf2_per_objfile->n_comp_units - 1;
2984 return dw2_instantiate_symtab (dw2_get_cu (index));
2987 /* Traversal function for dw2_forget_cached_source_info. */
2990 dw2_free_cached_file_names (void **slot, void *info)
2992 struct quick_file_names *file_data = (struct quick_file_names *) *slot;
2994 if (file_data->real_names)
2998 for (i = 0; i < file_data->num_file_names; ++i)
3000 xfree ((void*) file_data->real_names[i]);
3001 file_data->real_names[i] = NULL;
3009 dw2_forget_cached_source_info (struct objfile *objfile)
3011 dw2_setup (objfile);
3013 htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table,
3014 dw2_free_cached_file_names, NULL);
3017 /* Helper function for dw2_map_symtabs_matching_filename that expands
3018 the symtabs and calls the iterator. */
3021 dw2_map_expand_apply (struct objfile *objfile,
3022 struct dwarf2_per_cu_data *per_cu,
3024 const char *full_path, const char *real_path,
3025 int (*callback) (struct symtab *, void *),
3028 struct symtab *last_made = objfile->symtabs;
3030 /* Don't visit already-expanded CUs. */
3031 if (per_cu->v.quick->symtab)
3034 /* This may expand more than one symtab, and we want to iterate over
3036 dw2_instantiate_symtab (per_cu);
3038 return iterate_over_some_symtabs (name, full_path, real_path, callback, data,
3039 objfile->symtabs, last_made);
3042 /* Implementation of the map_symtabs_matching_filename method. */
3045 dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name,
3046 const char *full_path, const char *real_path,
3047 int (*callback) (struct symtab *, void *),
3051 const char *name_basename = lbasename (name);
3052 int is_abs = IS_ABSOLUTE_PATH (name);
3054 dw2_setup (objfile);
3056 /* The rule is CUs specify all the files, including those used by
3057 any TU, so there's no need to scan TUs here. */
3059 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3062 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3063 struct quick_file_names *file_data;
3065 /* We only need to look at symtabs not already expanded. */
3066 if (per_cu->v.quick->symtab)
3069 file_data = dw2_get_file_names (objfile, per_cu);
3070 if (file_data == NULL)
3073 for (j = 0; j < file_data->num_file_names; ++j)
3075 const char *this_name = file_data->file_names[j];
3077 if (FILENAME_CMP (name, this_name) == 0
3078 || (!is_abs && compare_filenames_for_search (this_name, name)))
3080 if (dw2_map_expand_apply (objfile, per_cu,
3081 name, full_path, real_path,
3086 /* Before we invoke realpath, which can get expensive when many
3087 files are involved, do a quick comparison of the basenames. */
3088 if (! basenames_may_differ
3089 && FILENAME_CMP (lbasename (this_name), name_basename) != 0)
3092 if (full_path != NULL)
3094 const char *this_real_name = dw2_get_real_path (objfile,
3097 if (this_real_name != NULL
3098 && (FILENAME_CMP (full_path, this_real_name) == 0
3100 && compare_filenames_for_search (this_real_name,
3103 if (dw2_map_expand_apply (objfile, per_cu,
3104 name, full_path, real_path,
3110 if (real_path != NULL)
3112 const char *this_real_name = dw2_get_real_path (objfile,
3115 if (this_real_name != NULL
3116 && (FILENAME_CMP (real_path, this_real_name) == 0
3118 && compare_filenames_for_search (this_real_name,
3121 if (dw2_map_expand_apply (objfile, per_cu,
3122 name, full_path, real_path,
3133 /* Struct used to manage iterating over all CUs looking for a symbol. */
3135 struct dw2_symtab_iterator
3137 /* The internalized form of .gdb_index. */
3138 struct mapped_index *index;
3139 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3140 int want_specific_block;
3141 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3142 Unused if !WANT_SPECIFIC_BLOCK. */
3144 /* The kind of symbol we're looking for. */
3146 /* The list of CUs from the index entry of the symbol,
3147 or NULL if not found. */
3149 /* The next element in VEC to look at. */
3151 /* The number of elements in VEC, or zero if there is no match. */
3155 /* Initialize the index symtab iterator ITER.
3156 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3157 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3160 dw2_symtab_iter_init (struct dw2_symtab_iterator *iter,
3161 struct mapped_index *index,
3162 int want_specific_block,
3167 iter->index = index;
3168 iter->want_specific_block = want_specific_block;
3169 iter->block_index = block_index;
3170 iter->domain = domain;
3173 if (find_slot_in_mapped_hash (index, name, &iter->vec))
3174 iter->length = MAYBE_SWAP (*iter->vec);
3182 /* Return the next matching CU or NULL if there are no more. */
3184 static struct dwarf2_per_cu_data *
3185 dw2_symtab_iter_next (struct dw2_symtab_iterator *iter)
3187 for ( ; iter->next < iter->length; ++iter->next)
3189 offset_type cu_index_and_attrs =
3190 MAYBE_SWAP (iter->vec[iter->next + 1]);
3191 offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3192 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
3193 int want_static = iter->block_index != GLOBAL_BLOCK;
3194 /* This value is only valid for index versions >= 7. */
3195 int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
3196 gdb_index_symbol_kind symbol_kind =
3197 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3198 /* Only check the symbol attributes if they're present.
3199 Indices prior to version 7 don't record them,
3200 and indices >= 7 may elide them for certain symbols
3201 (gold does this). */
3203 (iter->index->version >= 7
3204 && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE);
3206 /* Skip if already read in. */
3207 if (per_cu->v.quick->symtab)
3211 && iter->want_specific_block
3212 && want_static != is_static)
3215 /* Only check the symbol's kind if it has one. */
3218 switch (iter->domain)
3221 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE
3222 && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION
3223 /* Some types are also in VAR_DOMAIN. */
3224 && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3228 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3232 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER)
3247 static struct symtab *
3248 dw2_lookup_symbol (struct objfile *objfile, int block_index,
3249 const char *name, domain_enum domain)
3251 struct symtab *stab_best = NULL;
3252 struct mapped_index *index;
3254 dw2_setup (objfile);
3256 index = dwarf2_per_objfile->index_table;
3258 /* index is NULL if OBJF_READNOW. */
3261 struct dw2_symtab_iterator iter;
3262 struct dwarf2_per_cu_data *per_cu;
3264 dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name);
3266 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3268 struct symbol *sym = NULL;
3269 struct symtab *stab = dw2_instantiate_symtab (per_cu);
3271 /* Some caution must be observed with overloaded functions
3272 and methods, since the index will not contain any overload
3273 information (but NAME might contain it). */
3276 struct blockvector *bv = BLOCKVECTOR (stab);
3277 struct block *block = BLOCKVECTOR_BLOCK (bv, block_index);
3279 sym = lookup_block_symbol (block, name, domain);
3282 if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0)
3284 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
3290 /* Keep looking through other CUs. */
3298 dw2_print_stats (struct objfile *objfile)
3302 dw2_setup (objfile);
3304 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3305 + dwarf2_per_objfile->n_type_units); ++i)
3307 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3309 if (!per_cu->v.quick->symtab)
3312 printf_filtered (_(" Number of unread CUs: %d\n"), count);
3316 dw2_dump (struct objfile *objfile)
3318 /* Nothing worth printing. */
3322 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
3323 struct section_offsets *delta)
3325 /* There's nothing to relocate here. */
3329 dw2_expand_symtabs_for_function (struct objfile *objfile,
3330 const char *func_name)
3332 struct mapped_index *index;
3334 dw2_setup (objfile);
3336 index = dwarf2_per_objfile->index_table;
3338 /* index is NULL if OBJF_READNOW. */
3341 struct dw2_symtab_iterator iter;
3342 struct dwarf2_per_cu_data *per_cu;
3344 /* Note: It doesn't matter what we pass for block_index here. */
3345 dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN,
3348 while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL)
3349 dw2_instantiate_symtab (per_cu);
3354 dw2_expand_all_symtabs (struct objfile *objfile)
3358 dw2_setup (objfile);
3360 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3361 + dwarf2_per_objfile->n_type_units); ++i)
3363 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3365 dw2_instantiate_symtab (per_cu);
3370 dw2_expand_symtabs_with_filename (struct objfile *objfile,
3371 const char *filename)
3375 dw2_setup (objfile);
3377 /* We don't need to consider type units here.
3378 This is only called for examining code, e.g. expand_line_sal.
3379 There can be an order of magnitude (or more) more type units
3380 than comp units, and we avoid them if we can. */
3382 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3385 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3386 struct quick_file_names *file_data;
3388 /* We only need to look at symtabs not already expanded. */
3389 if (per_cu->v.quick->symtab)
3392 file_data = dw2_get_file_names (objfile, per_cu);
3393 if (file_data == NULL)
3396 for (j = 0; j < file_data->num_file_names; ++j)
3398 const char *this_name = file_data->file_names[j];
3399 if (FILENAME_CMP (this_name, filename) == 0)
3401 dw2_instantiate_symtab (per_cu);
3408 /* A helper function for dw2_find_symbol_file that finds the primary
3409 file name for a given CU. This is a die_reader_func. */
3412 dw2_get_primary_filename_reader (const struct die_reader_specs *reader,
3414 struct die_info *comp_unit_die,
3418 const char **result_ptr = data;
3419 struct dwarf2_cu *cu = reader->cu;
3420 struct attribute *attr;
3422 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
3426 *result_ptr = DW_STRING (attr);
3430 dw2_find_symbol_file (struct objfile *objfile, const char *name)
3432 struct dwarf2_per_cu_data *per_cu;
3434 const char *filename;
3436 dw2_setup (objfile);
3438 /* index_table is NULL if OBJF_READNOW. */
3439 if (!dwarf2_per_objfile->index_table)
3443 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
3445 struct blockvector *bv = BLOCKVECTOR (s);
3446 const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
3447 struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN);
3450 return SYMBOL_SYMTAB (sym)->filename;
3455 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
3459 /* Note that this just looks at the very first one named NAME -- but
3460 actually we are looking for a function. find_main_filename
3461 should be rewritten so that it doesn't require a custom hook. It
3462 could just use the ordinary symbol tables. */
3463 /* vec[0] is the length, which must always be >0. */
3464 per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1])));
3466 if (per_cu->v.quick->symtab != NULL)
3467 return per_cu->v.quick->symtab->filename;
3469 init_cutu_and_read_dies (per_cu, NULL, 0, 0,
3470 dw2_get_primary_filename_reader, &filename);
3476 dw2_map_matching_symbols (const char * name, domain_enum namespace,
3477 struct objfile *objfile, int global,
3478 int (*callback) (struct block *,
3479 struct symbol *, void *),
3480 void *data, symbol_compare_ftype *match,
3481 symbol_compare_ftype *ordered_compare)
3483 /* Currently unimplemented; used for Ada. The function can be called if the
3484 current language is Ada for a non-Ada objfile using GNU index. As Ada
3485 does not look for non-Ada symbols this function should just return. */
3489 dw2_expand_symtabs_matching
3490 (struct objfile *objfile,
3491 int (*file_matcher) (const char *, void *),
3492 int (*name_matcher) (const char *, void *),
3493 enum search_domain kind,
3498 struct mapped_index *index;
3500 dw2_setup (objfile);
3502 /* index_table is NULL if OBJF_READNOW. */
3503 if (!dwarf2_per_objfile->index_table)
3505 index = dwarf2_per_objfile->index_table;
3507 if (file_matcher != NULL)
3509 struct cleanup *cleanup;
3510 htab_t visited_found, visited_not_found;
3512 visited_found = htab_create_alloc (10,
3513 htab_hash_pointer, htab_eq_pointer,
3514 NULL, xcalloc, xfree);
3515 cleanup = make_cleanup_htab_delete (visited_found);
3516 visited_not_found = htab_create_alloc (10,
3517 htab_hash_pointer, htab_eq_pointer,
3518 NULL, xcalloc, xfree);
3519 make_cleanup_htab_delete (visited_not_found);
3521 /* The rule is CUs specify all the files, including those used by
3522 any TU, so there's no need to scan TUs here. */
3524 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3527 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3528 struct quick_file_names *file_data;
3531 per_cu->v.quick->mark = 0;
3533 /* We only need to look at symtabs not already expanded. */
3534 if (per_cu->v.quick->symtab)
3537 file_data = dw2_get_file_names (objfile, per_cu);
3538 if (file_data == NULL)
3541 if (htab_find (visited_not_found, file_data) != NULL)
3543 else if (htab_find (visited_found, file_data) != NULL)
3545 per_cu->v.quick->mark = 1;
3549 for (j = 0; j < file_data->num_file_names; ++j)
3551 if (file_matcher (file_data->file_names[j], data))
3553 per_cu->v.quick->mark = 1;
3558 slot = htab_find_slot (per_cu->v.quick->mark
3560 : visited_not_found,
3565 do_cleanups (cleanup);
3568 for (iter = 0; iter < index->symbol_table_slots; ++iter)
3570 offset_type idx = 2 * iter;
3572 offset_type *vec, vec_len, vec_idx;
3574 if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
3577 name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
3579 if (! (*name_matcher) (name, data))
3582 /* The name was matched, now expand corresponding CUs that were
3584 vec = (offset_type *) (index->constant_pool
3585 + MAYBE_SWAP (index->symbol_table[idx + 1]));
3586 vec_len = MAYBE_SWAP (vec[0]);
3587 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
3589 struct dwarf2_per_cu_data *per_cu;
3590 offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]);
3591 gdb_index_symbol_kind symbol_kind =
3592 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3593 int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3595 /* Don't crash on bad data. */
3596 if (cu_index >= (dwarf2_per_objfile->n_comp_units
3597 + dwarf2_per_objfile->n_type_units))
3600 /* Only check the symbol's kind if it has one.
3601 Indices prior to version 7 don't record it. */
3602 if (index->version >= 7)
3606 case VARIABLES_DOMAIN:
3607 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE)
3610 case FUNCTIONS_DOMAIN:
3611 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION)
3615 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3623 per_cu = dw2_get_cu (cu_index);
3624 if (file_matcher == NULL || per_cu->v.quick->mark)
3625 dw2_instantiate_symtab (per_cu);
3630 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3633 static struct symtab *
3634 recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc)
3638 if (BLOCKVECTOR (symtab) != NULL
3639 && blockvector_contains_pc (BLOCKVECTOR (symtab), pc))
3642 if (symtab->includes == NULL)
3645 for (i = 0; symtab->includes[i]; ++i)
3647 struct symtab *s = symtab->includes[i];
3649 s = recursively_find_pc_sect_symtab (s, pc);
3657 static struct symtab *
3658 dw2_find_pc_sect_symtab (struct objfile *objfile,
3659 struct minimal_symbol *msymbol,
3661 struct obj_section *section,
3664 struct dwarf2_per_cu_data *data;
3665 struct symtab *result;
3667 dw2_setup (objfile);
3669 if (!objfile->psymtabs_addrmap)
3672 data = addrmap_find (objfile->psymtabs_addrmap, pc);
3676 if (warn_if_readin && data->v.quick->symtab)
3677 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3678 paddress (get_objfile_arch (objfile), pc));
3680 result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc);
3681 gdb_assert (result != NULL);
3686 dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun,
3687 void *data, int need_fullname)
3690 struct cleanup *cleanup;
3691 htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer,
3692 NULL, xcalloc, xfree);
3694 cleanup = make_cleanup_htab_delete (visited);
3695 dw2_setup (objfile);
3697 /* The rule is CUs specify all the files, including those used by
3698 any TU, so there's no need to scan TUs here.
3699 We can ignore file names coming from already-expanded CUs. */
3701 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3703 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3705 if (per_cu->v.quick->symtab)
3707 void **slot = htab_find_slot (visited, per_cu->v.quick->file_names,
3710 *slot = per_cu->v.quick->file_names;
3714 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3717 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3718 struct quick_file_names *file_data;
3721 /* We only need to look at symtabs not already expanded. */
3722 if (per_cu->v.quick->symtab)
3725 file_data = dw2_get_file_names (objfile, per_cu);
3726 if (file_data == NULL)
3729 slot = htab_find_slot (visited, file_data, INSERT);
3732 /* Already visited. */
3737 for (j = 0; j < file_data->num_file_names; ++j)
3739 const char *this_real_name;
3742 this_real_name = dw2_get_real_path (objfile, file_data, j);
3744 this_real_name = NULL;
3745 (*fun) (file_data->file_names[j], this_real_name, data);
3749 do_cleanups (cleanup);
3753 dw2_has_symbols (struct objfile *objfile)
3758 const struct quick_symbol_functions dwarf2_gdb_index_functions =
3761 dw2_find_last_source_symtab,
3762 dw2_forget_cached_source_info,
3763 dw2_map_symtabs_matching_filename,
3768 dw2_expand_symtabs_for_function,
3769 dw2_expand_all_symtabs,
3770 dw2_expand_symtabs_with_filename,
3771 dw2_find_symbol_file,
3772 dw2_map_matching_symbols,
3773 dw2_expand_symtabs_matching,
3774 dw2_find_pc_sect_symtab,
3775 dw2_map_symbol_filenames
3778 /* Initialize for reading DWARF for this objfile. Return 0 if this
3779 file will use psymtabs, or 1 if using the GNU index. */
3782 dwarf2_initialize_objfile (struct objfile *objfile)
3784 /* If we're about to read full symbols, don't bother with the
3785 indices. In this case we also don't care if some other debug
3786 format is making psymtabs, because they are all about to be
3788 if ((objfile->flags & OBJF_READNOW))
3792 dwarf2_per_objfile->using_index = 1;
3793 create_all_comp_units (objfile);
3794 create_all_type_units (objfile);
3795 dwarf2_per_objfile->quick_file_names_table =
3796 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
3798 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3799 + dwarf2_per_objfile->n_type_units); ++i)
3801 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3803 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
3804 struct dwarf2_per_cu_quick_data);
3807 /* Return 1 so that gdb sees the "quick" functions. However,
3808 these functions will be no-ops because we will have expanded
3813 if (dwarf2_read_index (objfile))
3821 /* Build a partial symbol table. */
3824 dwarf2_build_psymtabs (struct objfile *objfile)
3826 volatile struct gdb_exception except;
3828 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3830 init_psymbol_list (objfile, 1024);
3833 TRY_CATCH (except, RETURN_MASK_ERROR)
3835 /* This isn't really ideal: all the data we allocate on the
3836 objfile's obstack is still uselessly kept around. However,
3837 freeing it seems unsafe. */
3838 struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile);
3840 dwarf2_build_psymtabs_hard (objfile);
3841 discard_cleanups (cleanups);
3843 if (except.reason < 0)
3844 exception_print (gdb_stderr, except);
3847 /* Return the total length of the CU described by HEADER. */
3850 get_cu_length (const struct comp_unit_head *header)
3852 return header->initial_length_size + header->length;
3855 /* Return TRUE if OFFSET is within CU_HEADER. */
3858 offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset)
3860 sect_offset bottom = { cu_header->offset.sect_off };
3861 sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) };
3863 return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off);
3866 /* Find the base address of the compilation unit for range lists and
3867 location lists. It will normally be specified by DW_AT_low_pc.
3868 In DWARF-3 draft 4, the base address could be overridden by
3869 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3870 compilation units with discontinuous ranges. */
3873 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
3875 struct attribute *attr;
3878 cu->base_address = 0;
3880 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
3883 cu->base_address = DW_ADDR (attr);
3888 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3891 cu->base_address = DW_ADDR (attr);
3897 /* Read in the comp unit header information from the debug_info at info_ptr.
3898 NOTE: This leaves members offset, first_die_offset to be filled in
3902 read_comp_unit_head (struct comp_unit_head *cu_header,
3903 gdb_byte *info_ptr, bfd *abfd)
3906 unsigned int bytes_read;
3908 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
3909 cu_header->initial_length_size = bytes_read;
3910 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
3911 info_ptr += bytes_read;
3912 cu_header->version = read_2_bytes (abfd, info_ptr);
3914 cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header,
3916 info_ptr += bytes_read;
3917 cu_header->addr_size = read_1_byte (abfd, info_ptr);
3919 signed_addr = bfd_get_sign_extend_vma (abfd);
3920 if (signed_addr < 0)
3921 internal_error (__FILE__, __LINE__,
3922 _("read_comp_unit_head: dwarf from non elf file"));
3923 cu_header->signed_addr_p = signed_addr;
3928 /* Helper function that returns the proper abbrev section for
3931 static struct dwarf2_section_info *
3932 get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu)
3934 struct dwarf2_section_info *abbrev;
3936 if (this_cu->is_dwz)
3937 abbrev = &dwarf2_get_dwz_file ()->abbrev;
3939 abbrev = &dwarf2_per_objfile->abbrev;
3944 /* Subroutine of read_and_check_comp_unit_head and
3945 read_and_check_type_unit_head to simplify them.
3946 Perform various error checking on the header. */
3949 error_check_comp_unit_head (struct comp_unit_head *header,
3950 struct dwarf2_section_info *section,
3951 struct dwarf2_section_info *abbrev_section)
3953 bfd *abfd = section->asection->owner;
3954 const char *filename = bfd_get_filename (abfd);
3956 if (header->version != 2 && header->version != 3 && header->version != 4)
3957 error (_("Dwarf Error: wrong version in compilation unit header "
3958 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
3961 if (header->abbrev_offset.sect_off
3962 >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section))
3963 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3964 "(offset 0x%lx + 6) [in module %s]"),
3965 (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off,
3968 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3969 avoid potential 32-bit overflow. */
3970 if (((unsigned long) header->offset.sect_off + get_cu_length (header))
3972 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3973 "(offset 0x%lx + 0) [in module %s]"),
3974 (long) header->length, (long) header->offset.sect_off,
3978 /* Read in a CU/TU header and perform some basic error checking.
3979 The contents of the header are stored in HEADER.
3980 The result is a pointer to the start of the first DIE. */
3983 read_and_check_comp_unit_head (struct comp_unit_head *header,
3984 struct dwarf2_section_info *section,
3985 struct dwarf2_section_info *abbrev_section,
3987 int is_debug_types_section)
3989 gdb_byte *beg_of_comp_unit = info_ptr;
3990 bfd *abfd = section->asection->owner;
3992 header->offset.sect_off = beg_of_comp_unit - section->buffer;
3994 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
3996 /* If we're reading a type unit, skip over the signature and
3997 type_offset fields. */
3998 if (is_debug_types_section)
3999 info_ptr += 8 /*signature*/ + header->offset_size;
4001 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4003 error_check_comp_unit_head (header, section, abbrev_section);
4008 /* Read in the types comp unit header information from .debug_types entry at
4009 types_ptr. The result is a pointer to one past the end of the header. */
4012 read_and_check_type_unit_head (struct comp_unit_head *header,
4013 struct dwarf2_section_info *section,
4014 struct dwarf2_section_info *abbrev_section,
4016 ULONGEST *signature,
4017 cu_offset *type_offset_in_tu)
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 (signature != NULL)
4029 *signature = read_8_bytes (abfd, info_ptr);
4031 if (type_offset_in_tu != NULL)
4032 type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr,
4033 header->offset_size);
4034 info_ptr += header->offset_size;
4036 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
4038 error_check_comp_unit_head (header, section, abbrev_section);
4043 /* Fetch the abbreviation table offset from a comp or type unit header. */
4046 read_abbrev_offset (struct dwarf2_section_info *section,
4049 bfd *abfd = section->asection->owner;
4051 unsigned int length, initial_length_size, offset_size;
4052 sect_offset abbrev_offset;
4054 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
4055 info_ptr = section->buffer + offset.sect_off;
4056 length = read_initial_length (abfd, info_ptr, &initial_length_size);
4057 offset_size = initial_length_size == 4 ? 4 : 8;
4058 info_ptr += initial_length_size + 2 /*version*/;
4059 abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size);
4060 return abbrev_offset;
4063 /* Allocate a new partial symtab for file named NAME and mark this new
4064 partial symtab as being an include of PST. */
4067 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
4068 struct objfile *objfile)
4070 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
4072 subpst->section_offsets = pst->section_offsets;
4073 subpst->textlow = 0;
4074 subpst->texthigh = 0;
4076 subpst->dependencies = (struct partial_symtab **)
4077 obstack_alloc (&objfile->objfile_obstack,
4078 sizeof (struct partial_symtab *));
4079 subpst->dependencies[0] = pst;
4080 subpst->number_of_dependencies = 1;
4082 subpst->globals_offset = 0;
4083 subpst->n_global_syms = 0;
4084 subpst->statics_offset = 0;
4085 subpst->n_static_syms = 0;
4086 subpst->symtab = NULL;
4087 subpst->read_symtab = pst->read_symtab;
4090 /* No private part is necessary for include psymtabs. This property
4091 can be used to differentiate between such include psymtabs and
4092 the regular ones. */
4093 subpst->read_symtab_private = NULL;
4096 /* Read the Line Number Program data and extract the list of files
4097 included by the source file represented by PST. Build an include
4098 partial symtab for each of these included files. */
4101 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
4102 struct die_info *die,
4103 struct partial_symtab *pst)
4105 struct line_header *lh = NULL;
4106 struct attribute *attr;
4108 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
4110 lh = dwarf_decode_line_header (DW_UNSND (attr), cu);
4112 return; /* No linetable, so no includes. */
4114 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4115 dwarf_decode_lines (lh, pst->dirname, cu, pst, 1);
4117 free_line_header (lh);
4121 hash_signatured_type (const void *item)
4123 const struct signatured_type *sig_type = item;
4125 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4126 return sig_type->signature;
4130 eq_signatured_type (const void *item_lhs, const void *item_rhs)
4132 const struct signatured_type *lhs = item_lhs;
4133 const struct signatured_type *rhs = item_rhs;
4135 return lhs->signature == rhs->signature;
4138 /* Allocate a hash table for signatured types. */
4141 allocate_signatured_type_table (struct objfile *objfile)
4143 return htab_create_alloc_ex (41,
4144 hash_signatured_type,
4147 &objfile->objfile_obstack,
4148 hashtab_obstack_allocate,
4149 dummy_obstack_deallocate);
4152 /* A helper function to add a signatured type CU to a table. */
4155 add_signatured_type_cu_to_table (void **slot, void *datum)
4157 struct signatured_type *sigt = *slot;
4158 struct signatured_type ***datap = datum;
4166 /* Create the hash table of all entries in the .debug_types section.
4167 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4169 Note: This function processes DWO files only, not DWP files.
4170 The result is a pointer to the hash table or NULL if there are
4174 create_debug_types_hash_table (struct dwo_file *dwo_file,
4175 VEC (dwarf2_section_info_def) *types)
4177 struct objfile *objfile = dwarf2_per_objfile->objfile;
4178 htab_t types_htab = NULL;
4180 struct dwarf2_section_info *section;
4181 struct dwarf2_section_info *abbrev_section;
4183 if (VEC_empty (dwarf2_section_info_def, types))
4186 abbrev_section = (dwo_file != NULL
4187 ? &dwo_file->sections.abbrev
4188 : &dwarf2_per_objfile->abbrev);
4190 if (dwarf2_read_debug)
4191 fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n",
4192 dwo_file ? ".dwo" : "",
4193 bfd_get_filename (abbrev_section->asection->owner));
4196 VEC_iterate (dwarf2_section_info_def, types, ix, section);
4200 gdb_byte *info_ptr, *end_ptr;
4201 struct dwarf2_section_info *abbrev_section;
4203 dwarf2_read_section (objfile, section);
4204 info_ptr = section->buffer;
4206 if (info_ptr == NULL)
4209 /* We can't set abfd until now because the section may be empty or
4210 not present, in which case section->asection will be NULL. */
4211 abfd = section->asection->owner;
4214 abbrev_section = &dwo_file->sections.abbrev;
4216 abbrev_section = &dwarf2_per_objfile->abbrev;
4218 if (types_htab == NULL)
4221 types_htab = allocate_dwo_unit_table (objfile);
4223 types_htab = allocate_signatured_type_table (objfile);
4226 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4227 because we don't need to read any dies: the signature is in the
4230 end_ptr = info_ptr + section->size;
4231 while (info_ptr < end_ptr)
4234 cu_offset type_offset_in_tu;
4236 struct signatured_type *sig_type;
4237 struct dwo_unit *dwo_tu;
4239 gdb_byte *ptr = info_ptr;
4240 struct comp_unit_head header;
4241 unsigned int length;
4243 offset.sect_off = ptr - section->buffer;
4245 /* We need to read the type's signature in order to build the hash
4246 table, but we don't need anything else just yet. */
4248 ptr = read_and_check_type_unit_head (&header, section,
4249 abbrev_section, ptr,
4250 &signature, &type_offset_in_tu);
4252 length = get_cu_length (&header);
4254 /* Skip dummy type units. */
4255 if (ptr >= info_ptr + length
4256 || peek_abbrev_code (abfd, ptr) == 0)
4265 dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4267 dwo_tu->dwo_file = dwo_file;
4268 dwo_tu->signature = signature;
4269 dwo_tu->type_offset_in_tu = type_offset_in_tu;
4270 dwo_tu->info_or_types_section = section;
4271 dwo_tu->offset = offset;
4272 dwo_tu->length = length;
4276 /* N.B.: type_offset is not usable if this type uses a DWO file.
4277 The real type_offset is in the DWO file. */
4279 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4280 struct signatured_type);
4281 sig_type->signature = signature;
4282 sig_type->type_offset_in_tu = type_offset_in_tu;
4283 sig_type->per_cu.objfile = objfile;
4284 sig_type->per_cu.is_debug_types = 1;
4285 sig_type->per_cu.info_or_types_section = section;
4286 sig_type->per_cu.offset = offset;
4287 sig_type->per_cu.length = length;
4290 slot = htab_find_slot (types_htab,
4291 dwo_file ? (void*) dwo_tu : (void *) sig_type,
4293 gdb_assert (slot != NULL);
4296 sect_offset dup_offset;
4300 const struct dwo_unit *dup_tu = *slot;
4302 dup_offset = dup_tu->offset;
4306 const struct signatured_type *dup_tu = *slot;
4308 dup_offset = dup_tu->per_cu.offset;
4311 complaint (&symfile_complaints,
4312 _("debug type entry at offset 0x%x is duplicate to the "
4313 "entry at offset 0x%x, signature 0x%s"),
4314 offset.sect_off, dup_offset.sect_off,
4315 phex (signature, sizeof (signature)));
4317 *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type;
4319 if (dwarf2_read_debug)
4320 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
4322 phex (signature, sizeof (signature)));
4331 /* Create the hash table of all entries in the .debug_types section,
4332 and initialize all_type_units.
4333 The result is zero if there is an error (e.g. missing .debug_types section),
4334 otherwise non-zero. */
4337 create_all_type_units (struct objfile *objfile)
4340 struct signatured_type **iter;
4342 types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types);
4343 if (types_htab == NULL)
4345 dwarf2_per_objfile->signatured_types = NULL;
4349 dwarf2_per_objfile->signatured_types = types_htab;
4351 dwarf2_per_objfile->n_type_units = htab_elements (types_htab);
4352 dwarf2_per_objfile->all_type_units
4353 = obstack_alloc (&objfile->objfile_obstack,
4354 dwarf2_per_objfile->n_type_units
4355 * sizeof (struct signatured_type *));
4356 iter = &dwarf2_per_objfile->all_type_units[0];
4357 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter);
4358 gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0]
4359 == dwarf2_per_objfile->n_type_units);
4364 /* Lookup a signature based type for DW_FORM_ref_sig8.
4365 Returns NULL if signature SIG is not present in the table. */
4367 static struct signatured_type *
4368 lookup_signatured_type (ULONGEST sig)
4370 struct signatured_type find_entry, *entry;
4372 if (dwarf2_per_objfile->signatured_types == NULL)
4374 complaint (&symfile_complaints,
4375 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4379 find_entry.signature = sig;
4380 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
4384 /* Low level DIE reading support. */
4386 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4389 init_cu_die_reader (struct die_reader_specs *reader,
4390 struct dwarf2_cu *cu,
4391 struct dwarf2_section_info *section,
4392 struct dwo_file *dwo_file)
4394 gdb_assert (section->readin && section->buffer != NULL);
4395 reader->abfd = section->asection->owner;
4397 reader->dwo_file = dwo_file;
4398 reader->die_section = section;
4399 reader->buffer = section->buffer;
4400 reader->buffer_end = section->buffer + section->size;
4403 /* Initialize a CU (or TU) and read its DIEs.
4404 If the CU defers to a DWO file, read the DWO file as well.
4406 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4407 Otherwise the table specified in the comp unit header is read in and used.
4408 This is an optimization for when we already have the abbrev table.
4410 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4411 Otherwise, a new CU is allocated with xmalloc.
4413 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4414 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4416 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4417 linker) then DIE_READER_FUNC will not get called. */
4420 init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
4421 struct abbrev_table *abbrev_table,
4422 int use_existing_cu, int keep,
4423 die_reader_func_ftype *die_reader_func,
4426 struct objfile *objfile = dwarf2_per_objfile->objfile;
4427 struct dwarf2_section_info *section = this_cu->info_or_types_section;
4428 bfd *abfd = section->asection->owner;
4429 struct dwarf2_cu *cu;
4430 gdb_byte *begin_info_ptr, *info_ptr;
4431 struct die_reader_specs reader;
4432 struct die_info *comp_unit_die;
4434 struct attribute *attr;
4435 struct cleanup *cleanups, *free_cu_cleanup = NULL;
4436 struct signatured_type *sig_type = NULL;
4437 struct dwarf2_section_info *abbrev_section;
4438 /* Non-zero if CU currently points to a DWO file and we need to
4439 reread it. When this happens we need to reread the skeleton die
4440 before we can reread the DWO file. */
4441 int rereading_dwo_cu = 0;
4443 if (dwarf2_die_debug)
4444 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
4445 this_cu->is_debug_types ? "type" : "comp",
4446 this_cu->offset.sect_off);
4448 if (use_existing_cu)
4451 cleanups = make_cleanup (null_cleanup, NULL);
4453 /* This is cheap if the section is already read in. */
4454 dwarf2_read_section (objfile, section);
4456 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
4458 abbrev_section = get_abbrev_section_for_cu (this_cu);
4460 if (use_existing_cu && this_cu->cu != NULL)
4464 /* If this CU is from a DWO file we need to start over, we need to
4465 refetch the attributes from the skeleton CU.
4466 This could be optimized by retrieving those attributes from when we
4467 were here the first time: the previous comp_unit_die was stored in
4468 comp_unit_obstack. But there's no data yet that we need this
4470 if (cu->dwo_unit != NULL)
4471 rereading_dwo_cu = 1;
4475 /* If !use_existing_cu, this_cu->cu must be NULL. */
4476 gdb_assert (this_cu->cu == NULL);
4478 cu = xmalloc (sizeof (*cu));
4479 init_one_comp_unit (cu, this_cu);
4481 /* If an error occurs while loading, release our storage. */
4482 free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
4485 if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu)
4487 /* We already have the header, there's no need to read it in again. */
4488 info_ptr += cu->header.first_die_offset.cu_off;
4492 if (this_cu->is_debug_types)
4495 cu_offset type_offset_in_tu;
4497 info_ptr = read_and_check_type_unit_head (&cu->header, section,
4498 abbrev_section, info_ptr,
4500 &type_offset_in_tu);
4502 /* Since per_cu is the first member of struct signatured_type,
4503 we can go from a pointer to one to a pointer to the other. */
4504 sig_type = (struct signatured_type *) this_cu;
4505 gdb_assert (sig_type->signature == signature);
4506 gdb_assert (sig_type->type_offset_in_tu.cu_off
4507 == type_offset_in_tu.cu_off);
4508 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
4510 /* LENGTH has not been set yet for type units if we're
4511 using .gdb_index. */
4512 this_cu->length = get_cu_length (&cu->header);
4514 /* Establish the type offset that can be used to lookup the type. */
4515 sig_type->type_offset_in_section.sect_off =
4516 this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off;
4520 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
4524 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
4525 gdb_assert (this_cu->length == get_cu_length (&cu->header));
4529 /* Skip dummy compilation units. */
4530 if (info_ptr >= begin_info_ptr + this_cu->length
4531 || peek_abbrev_code (abfd, info_ptr) == 0)
4533 do_cleanups (cleanups);
4537 /* If we don't have them yet, read the abbrevs for this compilation unit.
4538 And if we need to read them now, make sure they're freed when we're
4539 done. Note that it's important that if the CU had an abbrev table
4540 on entry we don't free it when we're done: Somewhere up the call stack
4541 it may be in use. */
4542 if (abbrev_table != NULL)
4544 gdb_assert (cu->abbrev_table == NULL);
4545 gdb_assert (cu->header.abbrev_offset.sect_off
4546 == abbrev_table->offset.sect_off);
4547 cu->abbrev_table = abbrev_table;
4549 else if (cu->abbrev_table == NULL)
4551 dwarf2_read_abbrevs (cu, abbrev_section);
4552 make_cleanup (dwarf2_free_abbrev_table, cu);
4554 else if (rereading_dwo_cu)
4556 dwarf2_free_abbrev_table (cu);
4557 dwarf2_read_abbrevs (cu, abbrev_section);
4560 /* Read the top level CU/TU die. */
4561 init_cu_die_reader (&reader, cu, section, NULL);
4562 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
4564 /* If we have a DWO stub, process it and then read in the DWO file.
4565 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4566 a DWO CU, that this test will fail. */
4567 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
4570 const char *dwo_name = DW_STRING (attr);
4571 const char *comp_dir_string;
4572 struct dwo_unit *dwo_unit;
4573 ULONGEST signature; /* Or dwo_id. */
4574 struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
4575 int i,num_extra_attrs;
4576 struct dwarf2_section_info *dwo_abbrev_section;
4579 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4580 " has children (offset 0x%x) [in module %s]"),
4581 this_cu->offset.sect_off, bfd_get_filename (abfd));
4583 /* These attributes aren't processed until later:
4584 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4585 However, the attribute is found in the stub which we won't have later.
4586 In order to not impose this complication on the rest of the code,
4587 we read them here and copy them to the DWO CU/TU die. */
4589 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4592 if (! this_cu->is_debug_types)
4593 stmt_list = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
4594 low_pc = dwarf2_attr (comp_unit_die, DW_AT_low_pc, cu);
4595 high_pc = dwarf2_attr (comp_unit_die, DW_AT_high_pc, cu);
4596 ranges = dwarf2_attr (comp_unit_die, DW_AT_ranges, cu);
4597 comp_dir = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
4599 /* There should be a DW_AT_addr_base attribute here (if needed).
4600 We need the value before we can process DW_FORM_GNU_addr_index. */
4602 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu);
4604 cu->addr_base = DW_UNSND (attr);
4606 /* There should be a DW_AT_ranges_base attribute here (if needed).
4607 We need the value before we can process DW_AT_ranges. */
4608 cu->ranges_base = 0;
4609 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu);
4611 cu->ranges_base = DW_UNSND (attr);
4613 if (this_cu->is_debug_types)
4615 gdb_assert (sig_type != NULL);
4616 signature = sig_type->signature;
4620 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
4622 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4624 signature = DW_UNSND (attr);
4627 /* We may need the comp_dir in order to find the DWO file. */
4628 comp_dir_string = NULL;
4630 comp_dir_string = DW_STRING (comp_dir);
4632 if (this_cu->is_debug_types)
4633 dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir_string);
4635 dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir_string,
4638 if (dwo_unit == NULL)
4640 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4641 " with ID %s [in module %s]"),
4642 this_cu->offset.sect_off,
4643 phex (signature, sizeof (signature)),
4647 /* Set up for reading the DWO CU/TU. */
4648 cu->dwo_unit = dwo_unit;
4649 section = dwo_unit->info_or_types_section;
4650 dwarf2_read_section (objfile, section);
4651 begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
4652 dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
4653 init_cu_die_reader (&reader, cu, section, dwo_unit->dwo_file);
4655 if (this_cu->is_debug_types)
4658 cu_offset type_offset_in_tu;
4660 info_ptr = read_and_check_type_unit_head (&cu->header, section,
4664 &type_offset_in_tu);
4665 gdb_assert (sig_type->signature == signature);
4666 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
4667 /* For DWOs coming from DWP files, we don't know the CU length
4668 nor the type's offset in the TU until now. */
4669 dwo_unit->length = get_cu_length (&cu->header);
4670 dwo_unit->type_offset_in_tu = type_offset_in_tu;
4672 /* Establish the type offset that can be used to lookup the type.
4673 For DWO files, we don't know it until now. */
4674 sig_type->type_offset_in_section.sect_off =
4675 dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
4679 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
4682 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
4683 /* For DWOs coming from DWP files, we don't know the CU length
4685 dwo_unit->length = get_cu_length (&cu->header);
4688 /* Discard the original CU's abbrev table, and read the DWO's. */
4689 if (abbrev_table == NULL)
4691 dwarf2_free_abbrev_table (cu);
4692 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
4696 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
4697 make_cleanup (dwarf2_free_abbrev_table, cu);
4700 /* Read in the die, but leave space to copy over the attributes
4701 from the stub. This has the benefit of simplifying the rest of
4702 the code - all the real work is done here. */
4703 num_extra_attrs = ((stmt_list != NULL)
4707 + (comp_dir != NULL));
4708 info_ptr = read_full_die_1 (&reader, &comp_unit_die, info_ptr,
4709 &has_children, num_extra_attrs);
4711 /* Copy over the attributes from the stub to the DWO die. */
4712 i = comp_unit_die->num_attrs;
4713 if (stmt_list != NULL)
4714 comp_unit_die->attrs[i++] = *stmt_list;
4716 comp_unit_die->attrs[i++] = *low_pc;
4717 if (high_pc != NULL)
4718 comp_unit_die->attrs[i++] = *high_pc;
4720 comp_unit_die->attrs[i++] = *ranges;
4721 if (comp_dir != NULL)
4722 comp_unit_die->attrs[i++] = *comp_dir;
4723 comp_unit_die->num_attrs += num_extra_attrs;
4725 /* Skip dummy compilation units. */
4726 if (info_ptr >= begin_info_ptr + dwo_unit->length
4727 || peek_abbrev_code (abfd, info_ptr) == 0)
4729 do_cleanups (cleanups);
4734 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
4736 if (free_cu_cleanup != NULL)
4740 /* We've successfully allocated this compilation unit. Let our
4741 caller clean it up when finished with it. */
4742 discard_cleanups (free_cu_cleanup);
4744 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4745 So we have to manually free the abbrev table. */
4746 dwarf2_free_abbrev_table (cu);
4748 /* Link this CU into read_in_chain. */
4749 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4750 dwarf2_per_objfile->read_in_chain = this_cu;
4753 do_cleanups (free_cu_cleanup);
4756 do_cleanups (cleanups);
4759 /* Read CU/TU THIS_CU in section SECTION,
4760 but do not follow DW_AT_GNU_dwo_name if present.
4761 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4762 to have already done the lookup to find the DWO/DWP file).
4764 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4765 THIS_CU->is_debug_types, but nothing else.
4767 We fill in THIS_CU->length.
4769 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4770 linker) then DIE_READER_FUNC will not get called.
4772 THIS_CU->cu is always freed when done.
4773 This is done in order to not leave THIS_CU->cu in a state where we have
4774 to care whether it refers to the "main" CU or the DWO CU. */
4777 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu,
4778 struct dwarf2_section_info *abbrev_section,
4779 struct dwo_file *dwo_file,
4780 die_reader_func_ftype *die_reader_func,
4783 struct objfile *objfile = dwarf2_per_objfile->objfile;
4784 struct dwarf2_section_info *section = this_cu->info_or_types_section;
4785 bfd *abfd = section->asection->owner;
4786 struct dwarf2_cu cu;
4787 gdb_byte *begin_info_ptr, *info_ptr;
4788 struct die_reader_specs reader;
4789 struct cleanup *cleanups;
4790 struct die_info *comp_unit_die;
4793 if (dwarf2_die_debug)
4794 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
4795 this_cu->is_debug_types ? "type" : "comp",
4796 this_cu->offset.sect_off);
4798 gdb_assert (this_cu->cu == NULL);
4800 /* This is cheap if the section is already read in. */
4801 dwarf2_read_section (objfile, section);
4803 init_one_comp_unit (&cu, this_cu);
4805 cleanups = make_cleanup (free_stack_comp_unit, &cu);
4807 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
4808 info_ptr = read_and_check_comp_unit_head (&cu.header, section,
4809 abbrev_section, info_ptr,
4810 this_cu->is_debug_types);
4812 this_cu->length = get_cu_length (&cu.header);
4814 /* Skip dummy compilation units. */
4815 if (info_ptr >= begin_info_ptr + this_cu->length
4816 || peek_abbrev_code (abfd, info_ptr) == 0)
4818 do_cleanups (cleanups);
4822 dwarf2_read_abbrevs (&cu, abbrev_section);
4823 make_cleanup (dwarf2_free_abbrev_table, &cu);
4825 init_cu_die_reader (&reader, &cu, section, dwo_file);
4826 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
4828 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
4830 do_cleanups (cleanups);
4833 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4834 does not lookup the specified DWO file.
4835 This cannot be used to read DWO files.
4837 THIS_CU->cu is always freed when done.
4838 This is done in order to not leave THIS_CU->cu in a state where we have
4839 to care whether it refers to the "main" CU or the DWO CU.
4840 We can revisit this if the data shows there's a performance issue. */
4843 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu,
4844 die_reader_func_ftype *die_reader_func,
4847 init_cutu_and_read_dies_no_follow (this_cu,
4848 get_abbrev_section_for_cu (this_cu),
4850 die_reader_func, data);
4853 /* Create a psymtab named NAME and assign it to PER_CU.
4855 The caller must fill in the following details:
4856 dirname, textlow, texthigh. */
4858 static struct partial_symtab *
4859 create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
4861 struct objfile *objfile = per_cu->objfile;
4862 struct partial_symtab *pst;
4864 pst = start_psymtab_common (objfile, objfile->section_offsets,
4866 objfile->global_psymbols.next,
4867 objfile->static_psymbols.next);
4869 pst->psymtabs_addrmap_supported = 1;
4871 /* This is the glue that links PST into GDB's symbol API. */
4872 pst->read_symtab_private = per_cu;
4873 pst->read_symtab = dwarf2_read_symtab;
4874 per_cu->v.psymtab = pst;
4879 /* die_reader_func for process_psymtab_comp_unit. */
4882 process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
4884 struct die_info *comp_unit_die,
4888 struct dwarf2_cu *cu = reader->cu;
4889 struct objfile *objfile = cu->objfile;
4890 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
4891 struct attribute *attr;
4893 CORE_ADDR best_lowpc = 0, best_highpc = 0;
4894 struct partial_symtab *pst;
4896 const char *filename;
4897 int *want_partial_unit_ptr = data;
4899 if (comp_unit_die->tag == DW_TAG_partial_unit
4900 && (want_partial_unit_ptr == NULL
4901 || !*want_partial_unit_ptr))
4904 gdb_assert (! per_cu->is_debug_types);
4906 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
4908 cu->list_in_scope = &file_symbols;
4910 /* Allocate a new partial symbol table structure. */
4911 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
4912 if (attr == NULL || !DW_STRING (attr))
4915 filename = DW_STRING (attr);
4917 pst = create_partial_symtab (per_cu, filename);
4919 /* This must be done before calling dwarf2_build_include_psymtabs. */
4920 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
4922 pst->dirname = DW_STRING (attr);
4924 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4926 dwarf2_find_base_address (comp_unit_die, cu);
4928 /* Possibly set the default values of LOWPC and HIGHPC from
4930 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
4931 &best_highpc, cu, pst);
4932 if (has_pc_info == 1 && best_lowpc < best_highpc)
4933 /* Store the contiguous range if it is not empty; it can be empty for
4934 CUs with no code. */
4935 addrmap_set_empty (objfile->psymtabs_addrmap,
4936 best_lowpc + baseaddr,
4937 best_highpc + baseaddr - 1, pst);
4939 /* Check if comp unit has_children.
4940 If so, read the rest of the partial symbols from this comp unit.
4941 If not, there's no more debug_info for this comp unit. */
4944 struct partial_die_info *first_die;
4945 CORE_ADDR lowpc, highpc;
4947 lowpc = ((CORE_ADDR) -1);
4948 highpc = ((CORE_ADDR) 0);
4950 first_die = load_partial_dies (reader, info_ptr, 1);
4952 scan_partial_symbols (first_die, &lowpc, &highpc,
4955 /* If we didn't find a lowpc, set it to highpc to avoid
4956 complaints from `maint check'. */
4957 if (lowpc == ((CORE_ADDR) -1))
4960 /* If the compilation unit didn't have an explicit address range,
4961 then use the information extracted from its child dies. */
4965 best_highpc = highpc;
4968 pst->textlow = best_lowpc + baseaddr;
4969 pst->texthigh = best_highpc + baseaddr;
4971 pst->n_global_syms = objfile->global_psymbols.next -
4972 (objfile->global_psymbols.list + pst->globals_offset);
4973 pst->n_static_syms = objfile->static_psymbols.next -
4974 (objfile->static_psymbols.list + pst->statics_offset);
4975 sort_pst_symbols (objfile, pst);
4977 if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs))
4980 int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
4981 struct dwarf2_per_cu_data *iter;
4983 /* Fill in 'dependencies' here; we fill in 'users' in a
4985 pst->number_of_dependencies = len;
4986 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
4987 len * sizeof (struct symtab *));
4989 VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
4992 pst->dependencies[i] = iter->v.psymtab;
4994 VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
4997 /* Get the list of files included in the current compilation unit,
4998 and build a psymtab for each of them. */
4999 dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
5001 if (dwarf2_read_debug)
5003 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5005 fprintf_unfiltered (gdb_stdlog,
5006 "Psymtab for %s unit @0x%x: %s - %s"
5007 ", %d global, %d static syms\n",
5008 per_cu->is_debug_types ? "type" : "comp",
5009 per_cu->offset.sect_off,
5010 paddress (gdbarch, pst->textlow),
5011 paddress (gdbarch, pst->texthigh),
5012 pst->n_global_syms, pst->n_static_syms);
5016 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5017 Process compilation unit THIS_CU for a psymtab. */
5020 process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
5021 int want_partial_unit)
5023 /* If this compilation unit was already read in, free the
5024 cached copy in order to read it in again. This is
5025 necessary because we skipped some symbols when we first
5026 read in the compilation unit (see load_partial_dies).
5027 This problem could be avoided, but the benefit is unclear. */
5028 if (this_cu->cu != NULL)
5029 free_one_cached_comp_unit (this_cu);
5031 gdb_assert (! this_cu->is_debug_types);
5032 init_cutu_and_read_dies (this_cu, NULL, 0, 0,
5033 process_psymtab_comp_unit_reader,
5034 &want_partial_unit);
5036 /* Age out any secondary CUs. */
5037 age_cached_comp_units ();
5041 hash_type_unit_group (const void *item)
5043 const struct type_unit_group *tu_group = item;
5045 return hash_stmt_list_entry (&tu_group->hash);
5049 eq_type_unit_group (const void *item_lhs, const void *item_rhs)
5051 const struct type_unit_group *lhs = item_lhs;
5052 const struct type_unit_group *rhs = item_rhs;
5054 return eq_stmt_list_entry (&lhs->hash, &rhs->hash);
5057 /* Allocate a hash table for type unit groups. */
5060 allocate_type_unit_groups_table (void)
5062 return htab_create_alloc_ex (3,
5063 hash_type_unit_group,
5066 &dwarf2_per_objfile->objfile->objfile_obstack,
5067 hashtab_obstack_allocate,
5068 dummy_obstack_deallocate);
5071 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5072 partial symtabs. We combine several TUs per psymtab to not let the size
5073 of any one psymtab grow too big. */
5074 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5075 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5077 /* Helper routine for get_type_unit_group.
5078 Create the type_unit_group object used to hold one or more TUs. */
5080 static struct type_unit_group *
5081 create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct)
5083 struct objfile *objfile = dwarf2_per_objfile->objfile;
5084 struct dwarf2_per_cu_data *per_cu;
5085 struct type_unit_group *tu_group;
5087 tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5088 struct type_unit_group);
5089 per_cu = &tu_group->per_cu;
5090 per_cu->objfile = objfile;
5091 per_cu->is_debug_types = 1;
5092 per_cu->type_unit_group = tu_group;
5094 if (dwarf2_per_objfile->using_index)
5096 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
5097 struct dwarf2_per_cu_quick_data);
5098 tu_group->t.first_tu = cu->per_cu;
5102 unsigned int line_offset = line_offset_struct.sect_off;
5103 struct partial_symtab *pst;
5106 /* Give the symtab a useful name for debug purposes. */
5107 if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
5108 name = xstrprintf ("<type_units_%d>",
5109 (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
5111 name = xstrprintf ("<type_units_at_0x%x>", line_offset);
5113 pst = create_partial_symtab (per_cu, name);
5119 tu_group->hash.dwo_unit = cu->dwo_unit;
5120 tu_group->hash.line_offset = line_offset_struct;
5125 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5126 STMT_LIST is a DW_AT_stmt_list attribute. */
5128 static struct type_unit_group *
5129 get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list)
5131 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
5132 struct type_unit_group *tu_group;
5134 unsigned int line_offset;
5135 struct type_unit_group type_unit_group_for_lookup;
5137 if (dwarf2_per_objfile->type_unit_groups == NULL)
5139 dwarf2_per_objfile->type_unit_groups =
5140 allocate_type_unit_groups_table ();
5143 /* Do we need to create a new group, or can we use an existing one? */
5147 line_offset = DW_UNSND (stmt_list);
5148 ++tu_stats->nr_symtab_sharers;
5152 /* Ugh, no stmt_list. Rare, but we have to handle it.
5153 We can do various things here like create one group per TU or
5154 spread them over multiple groups to split up the expansion work.
5155 To avoid worst case scenarios (too many groups or too large groups)
5156 we, umm, group them in bunches. */
5157 line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5158 | (tu_stats->nr_stmt_less_type_units
5159 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE));
5160 ++tu_stats->nr_stmt_less_type_units;
5163 type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit;
5164 type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset;
5165 slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups,
5166 &type_unit_group_for_lookup, INSERT);
5170 gdb_assert (tu_group != NULL);
5174 sect_offset line_offset_struct;
5176 line_offset_struct.sect_off = line_offset;
5177 tu_group = create_type_unit_group (cu, line_offset_struct);
5179 ++tu_stats->nr_symtabs;
5185 /* Struct used to sort TUs by their abbreviation table offset. */
5187 struct tu_abbrev_offset
5189 struct signatured_type *sig_type;
5190 sect_offset abbrev_offset;
5193 /* Helper routine for build_type_unit_groups, passed to qsort. */
5196 sort_tu_by_abbrev_offset (const void *ap, const void *bp)
5198 const struct tu_abbrev_offset * const *a = ap;
5199 const struct tu_abbrev_offset * const *b = bp;
5200 unsigned int aoff = (*a)->abbrev_offset.sect_off;
5201 unsigned int boff = (*b)->abbrev_offset.sect_off;
5203 return (aoff > boff) - (aoff < boff);
5206 /* A helper function to add a type_unit_group to a table. */
5209 add_type_unit_group_to_table (void **slot, void *datum)
5211 struct type_unit_group *tu_group = *slot;
5212 struct type_unit_group ***datap = datum;
5220 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5221 each one passing FUNC,DATA.
5223 The efficiency is because we sort TUs by the abbrev table they use and
5224 only read each abbrev table once. In one program there are 200K TUs
5225 sharing 8K abbrev tables.
5227 The main purpose of this function is to support building the
5228 dwarf2_per_objfile->type_unit_groups table.
5229 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5230 can collapse the search space by grouping them by stmt_list.
5231 The savings can be significant, in the same program from above the 200K TUs
5232 share 8K stmt_list tables.
5234 FUNC is expected to call get_type_unit_group, which will create the
5235 struct type_unit_group if necessary and add it to
5236 dwarf2_per_objfile->type_unit_groups. */
5239 build_type_unit_groups (die_reader_func_ftype *func, void *data)
5241 struct objfile *objfile = dwarf2_per_objfile->objfile;
5242 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
5243 struct cleanup *cleanups;
5244 struct abbrev_table *abbrev_table;
5245 sect_offset abbrev_offset;
5246 struct tu_abbrev_offset *sorted_by_abbrev;
5247 struct type_unit_group **iter;
5250 /* It's up to the caller to not call us multiple times. */
5251 gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL);
5253 if (dwarf2_per_objfile->n_type_units == 0)
5256 /* TUs typically share abbrev tables, and there can be way more TUs than
5257 abbrev tables. Sort by abbrev table to reduce the number of times we
5258 read each abbrev table in.
5259 Alternatives are to punt or to maintain a cache of abbrev tables.
5260 This is simpler and efficient enough for now.
5262 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5263 symtab to use). Typically TUs with the same abbrev offset have the same
5264 stmt_list value too so in practice this should work well.
5266 The basic algorithm here is:
5268 sort TUs by abbrev table
5269 for each TU with same abbrev table:
5270 read abbrev table if first user
5271 read TU top level DIE
5272 [IWBN if DWO skeletons had DW_AT_stmt_list]
5275 if (dwarf2_read_debug)
5276 fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n");
5278 /* Sort in a separate table to maintain the order of all_type_units
5279 for .gdb_index: TU indices directly index all_type_units. */
5280 sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset,
5281 dwarf2_per_objfile->n_type_units);
5282 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
5284 struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i];
5286 sorted_by_abbrev[i].sig_type = sig_type;
5287 sorted_by_abbrev[i].abbrev_offset =
5288 read_abbrev_offset (sig_type->per_cu.info_or_types_section,
5289 sig_type->per_cu.offset);
5291 cleanups = make_cleanup (xfree, sorted_by_abbrev);
5292 qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units,
5293 sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset);
5295 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5296 called any number of times, so we don't reset tu_stats here. */
5298 abbrev_offset.sect_off = ~(unsigned) 0;
5299 abbrev_table = NULL;
5300 make_cleanup (abbrev_table_free_cleanup, &abbrev_table);
5302 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
5304 const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i];
5306 /* Switch to the next abbrev table if necessary. */
5307 if (abbrev_table == NULL
5308 || tu->abbrev_offset.sect_off != abbrev_offset.sect_off)
5310 if (abbrev_table != NULL)
5312 abbrev_table_free (abbrev_table);
5313 /* Reset to NULL in case abbrev_table_read_table throws
5314 an error: abbrev_table_free_cleanup will get called. */
5315 abbrev_table = NULL;
5317 abbrev_offset = tu->abbrev_offset;
5319 abbrev_table_read_table (&dwarf2_per_objfile->abbrev,
5321 ++tu_stats->nr_uniq_abbrev_tables;
5324 init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0,
5328 /* Create a vector of pointers to primary type units to make it easy to
5329 iterate over them and CUs. See dw2_get_primary_cu. */
5330 dwarf2_per_objfile->n_type_unit_groups =
5331 htab_elements (dwarf2_per_objfile->type_unit_groups);
5332 dwarf2_per_objfile->all_type_unit_groups =
5333 obstack_alloc (&objfile->objfile_obstack,
5334 dwarf2_per_objfile->n_type_unit_groups
5335 * sizeof (struct type_unit_group *));
5336 iter = &dwarf2_per_objfile->all_type_unit_groups[0];
5337 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
5338 add_type_unit_group_to_table, &iter);
5339 gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0]
5340 == dwarf2_per_objfile->n_type_unit_groups);
5342 do_cleanups (cleanups);
5344 if (dwarf2_read_debug)
5346 fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n");
5347 fprintf_unfiltered (gdb_stdlog, " %d TUs\n",
5348 dwarf2_per_objfile->n_type_units);
5349 fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n",
5350 tu_stats->nr_uniq_abbrev_tables);
5351 fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n",
5352 tu_stats->nr_symtabs);
5353 fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n",
5354 tu_stats->nr_symtab_sharers);
5355 fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n",
5356 tu_stats->nr_stmt_less_type_units);
5360 /* Reader function for build_type_psymtabs. */
5363 build_type_psymtabs_reader (const struct die_reader_specs *reader,
5365 struct die_info *type_unit_die,
5369 struct objfile *objfile = dwarf2_per_objfile->objfile;
5370 struct dwarf2_cu *cu = reader->cu;
5371 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
5372 struct type_unit_group *tu_group;
5373 struct attribute *attr;
5374 struct partial_die_info *first_die;
5375 CORE_ADDR lowpc, highpc;
5376 struct partial_symtab *pst;
5378 gdb_assert (data == NULL);
5383 attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
5384 tu_group = get_type_unit_group (cu, attr);
5386 VEC_safe_push (dwarf2_per_cu_ptr, tu_group->t.tus, per_cu);
5388 prepare_one_comp_unit (cu, type_unit_die, language_minimal);
5389 cu->list_in_scope = &file_symbols;
5390 pst = create_partial_symtab (per_cu, "");
5393 first_die = load_partial_dies (reader, info_ptr, 1);
5395 lowpc = (CORE_ADDR) -1;
5396 highpc = (CORE_ADDR) 0;
5397 scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu);
5399 pst->n_global_syms = objfile->global_psymbols.next -
5400 (objfile->global_psymbols.list + pst->globals_offset);
5401 pst->n_static_syms = objfile->static_psymbols.next -
5402 (objfile->static_psymbols.list + pst->statics_offset);
5403 sort_pst_symbols (objfile, pst);
5406 /* Traversal function for build_type_psymtabs. */
5409 build_type_psymtab_dependencies (void **slot, void *info)
5411 struct objfile *objfile = dwarf2_per_objfile->objfile;
5412 struct type_unit_group *tu_group = (struct type_unit_group *) *slot;
5413 struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu;
5414 struct partial_symtab *pst = per_cu->v.psymtab;
5415 int len = VEC_length (dwarf2_per_cu_ptr, tu_group->t.tus);
5416 struct dwarf2_per_cu_data *iter;
5419 gdb_assert (len > 0);
5421 pst->number_of_dependencies = len;
5422 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
5423 len * sizeof (struct psymtab *));
5425 VEC_iterate (dwarf2_per_cu_ptr, tu_group->t.tus, i, iter);
5428 pst->dependencies[i] = iter->v.psymtab;
5429 iter->type_unit_group = tu_group;
5432 VEC_free (dwarf2_per_cu_ptr, tu_group->t.tus);
5437 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5438 Build partial symbol tables for the .debug_types comp-units. */
5441 build_type_psymtabs (struct objfile *objfile)
5443 if (! create_all_type_units (objfile))
5446 build_type_unit_groups (build_type_psymtabs_reader, NULL);
5448 /* Now that all TUs have been processed we can fill in the dependencies. */
5449 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
5450 build_type_psymtab_dependencies, NULL);
5453 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5456 psymtabs_addrmap_cleanup (void *o)
5458 struct objfile *objfile = o;
5460 objfile->psymtabs_addrmap = NULL;
5463 /* Compute the 'user' field for each psymtab in OBJFILE. */
5466 set_partial_user (struct objfile *objfile)
5470 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
5472 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
5473 struct partial_symtab *pst = per_cu->v.psymtab;
5479 for (j = 0; j < pst->number_of_dependencies; ++j)
5481 /* Set the 'user' field only if it is not already set. */
5482 if (pst->dependencies[j]->user == NULL)
5483 pst->dependencies[j]->user = pst;
5488 /* Build the partial symbol table by doing a quick pass through the
5489 .debug_info and .debug_abbrev sections. */
5492 dwarf2_build_psymtabs_hard (struct objfile *objfile)
5494 struct cleanup *back_to, *addrmap_cleanup;
5495 struct obstack temp_obstack;
5498 if (dwarf2_read_debug)
5500 fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n",
5504 dwarf2_per_objfile->reading_partial_symbols = 1;
5506 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
5508 /* Any cached compilation units will be linked by the per-objfile
5509 read_in_chain. Make sure to free them when we're done. */
5510 back_to = make_cleanup (free_cached_comp_units, NULL);
5512 build_type_psymtabs (objfile);
5514 create_all_comp_units (objfile);
5516 /* Create a temporary address map on a temporary obstack. We later
5517 copy this to the final obstack. */
5518 obstack_init (&temp_obstack);
5519 make_cleanup_obstack_free (&temp_obstack);
5520 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
5521 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
5523 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
5525 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
5527 process_psymtab_comp_unit (per_cu, 0);
5530 set_partial_user (objfile);
5532 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
5533 &objfile->objfile_obstack);
5534 discard_cleanups (addrmap_cleanup);
5536 do_cleanups (back_to);
5538 if (dwarf2_read_debug)
5539 fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n",
5543 /* die_reader_func for load_partial_comp_unit. */
5546 load_partial_comp_unit_reader (const struct die_reader_specs *reader,
5548 struct die_info *comp_unit_die,
5552 struct dwarf2_cu *cu = reader->cu;
5554 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
5556 /* Check if comp unit has_children.
5557 If so, read the rest of the partial symbols from this comp unit.
5558 If not, there's no more debug_info for this comp unit. */
5560 load_partial_dies (reader, info_ptr, 0);
5563 /* Load the partial DIEs for a secondary CU into memory.
5564 This is also used when rereading a primary CU with load_all_dies. */
5567 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
5569 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
5570 load_partial_comp_unit_reader, NULL);
5574 read_comp_units_from_section (struct objfile *objfile,
5575 struct dwarf2_section_info *section,
5576 unsigned int is_dwz,
5579 struct dwarf2_per_cu_data ***all_comp_units)
5582 bfd *abfd = section->asection->owner;
5584 dwarf2_read_section (objfile, section);
5586 info_ptr = section->buffer;
5588 while (info_ptr < section->buffer + section->size)
5590 unsigned int length, initial_length_size;
5591 struct dwarf2_per_cu_data *this_cu;
5594 offset.sect_off = info_ptr - section->buffer;
5596 /* Read just enough information to find out where the next
5597 compilation unit is. */
5598 length = read_initial_length (abfd, info_ptr, &initial_length_size);
5600 /* Save the compilation unit for later lookup. */
5601 this_cu = obstack_alloc (&objfile->objfile_obstack,
5602 sizeof (struct dwarf2_per_cu_data));
5603 memset (this_cu, 0, sizeof (*this_cu));
5604 this_cu->offset = offset;
5605 this_cu->length = length + initial_length_size;
5606 this_cu->is_dwz = is_dwz;
5607 this_cu->objfile = objfile;
5608 this_cu->info_or_types_section = section;
5610 if (*n_comp_units == *n_allocated)
5613 *all_comp_units = xrealloc (*all_comp_units,
5615 * sizeof (struct dwarf2_per_cu_data *));
5617 (*all_comp_units)[*n_comp_units] = this_cu;
5620 info_ptr = info_ptr + this_cu->length;
5624 /* Create a list of all compilation units in OBJFILE.
5625 This is only done for -readnow and building partial symtabs. */
5628 create_all_comp_units (struct objfile *objfile)
5632 struct dwarf2_per_cu_data **all_comp_units;
5636 all_comp_units = xmalloc (n_allocated
5637 * sizeof (struct dwarf2_per_cu_data *));
5639 read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0,
5640 &n_allocated, &n_comp_units, &all_comp_units);
5642 if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL)
5644 struct dwz_file *dwz = dwarf2_get_dwz_file ();
5646 read_comp_units_from_section (objfile, &dwz->info, 1,
5647 &n_allocated, &n_comp_units,
5651 dwarf2_per_objfile->all_comp_units
5652 = obstack_alloc (&objfile->objfile_obstack,
5653 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
5654 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
5655 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
5656 xfree (all_comp_units);
5657 dwarf2_per_objfile->n_comp_units = n_comp_units;
5660 /* Process all loaded DIEs for compilation unit CU, starting at
5661 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5662 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5663 DW_AT_ranges). If NEED_PC is set, then this function will set
5664 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5665 and record the covered ranges in the addrmap. */
5668 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
5669 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
5671 struct partial_die_info *pdi;
5673 /* Now, march along the PDI's, descending into ones which have
5674 interesting children but skipping the children of the other ones,
5675 until we reach the end of the compilation unit. */
5681 fixup_partial_die (pdi, cu);
5683 /* Anonymous namespaces or modules have no name but have interesting
5684 children, so we need to look at them. Ditto for anonymous
5687 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
5688 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type
5689 || pdi->tag == DW_TAG_imported_unit)
5693 case DW_TAG_subprogram:
5694 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
5696 case DW_TAG_constant:
5697 case DW_TAG_variable:
5698 case DW_TAG_typedef:
5699 case DW_TAG_union_type:
5700 if (!pdi->is_declaration)
5702 add_partial_symbol (pdi, cu);
5705 case DW_TAG_class_type:
5706 case DW_TAG_interface_type:
5707 case DW_TAG_structure_type:
5708 if (!pdi->is_declaration)
5710 add_partial_symbol (pdi, cu);
5713 case DW_TAG_enumeration_type:
5714 if (!pdi->is_declaration)
5715 add_partial_enumeration (pdi, cu);
5717 case DW_TAG_base_type:
5718 case DW_TAG_subrange_type:
5719 /* File scope base type definitions are added to the partial
5721 add_partial_symbol (pdi, cu);
5723 case DW_TAG_namespace:
5724 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
5727 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
5729 case DW_TAG_imported_unit:
5731 struct dwarf2_per_cu_data *per_cu;
5733 /* For now we don't handle imported units in type units. */
5734 if (cu->per_cu->is_debug_types)
5736 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5737 " supported in type units [in module %s]"),
5741 per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset,
5745 /* Go read the partial unit, if needed. */
5746 if (per_cu->v.psymtab == NULL)
5747 process_psymtab_comp_unit (per_cu, 1);
5749 VEC_safe_push (dwarf2_per_cu_ptr,
5750 cu->per_cu->imported_symtabs, per_cu);
5758 /* If the die has a sibling, skip to the sibling. */
5760 pdi = pdi->die_sibling;
5764 /* Functions used to compute the fully scoped name of a partial DIE.
5766 Normally, this is simple. For C++, the parent DIE's fully scoped
5767 name is concatenated with "::" and the partial DIE's name. For
5768 Java, the same thing occurs except that "." is used instead of "::".
5769 Enumerators are an exception; they use the scope of their parent
5770 enumeration type, i.e. the name of the enumeration type is not
5771 prepended to the enumerator.
5773 There are two complexities. One is DW_AT_specification; in this
5774 case "parent" means the parent of the target of the specification,
5775 instead of the direct parent of the DIE. The other is compilers
5776 which do not emit DW_TAG_namespace; in this case we try to guess
5777 the fully qualified name of structure types from their members'
5778 linkage names. This must be done using the DIE's children rather
5779 than the children of any DW_AT_specification target. We only need
5780 to do this for structures at the top level, i.e. if the target of
5781 any DW_AT_specification (if any; otherwise the DIE itself) does not
5784 /* Compute the scope prefix associated with PDI's parent, in
5785 compilation unit CU. The result will be allocated on CU's
5786 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5787 field. NULL is returned if no prefix is necessary. */
5789 partial_die_parent_scope (struct partial_die_info *pdi,
5790 struct dwarf2_cu *cu)
5792 const char *grandparent_scope;
5793 struct partial_die_info *parent, *real_pdi;
5795 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5796 then this means the parent of the specification DIE. */
5799 while (real_pdi->has_specification)
5800 real_pdi = find_partial_die (real_pdi->spec_offset,
5801 real_pdi->spec_is_dwz, cu);
5803 parent = real_pdi->die_parent;
5807 if (parent->scope_set)
5808 return parent->scope;
5810 fixup_partial_die (parent, cu);
5812 grandparent_scope = partial_die_parent_scope (parent, cu);
5814 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5815 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5816 Work around this problem here. */
5817 if (cu->language == language_cplus
5818 && parent->tag == DW_TAG_namespace
5819 && strcmp (parent->name, "::") == 0
5820 && grandparent_scope == NULL)
5822 parent->scope = NULL;
5823 parent->scope_set = 1;
5827 if (pdi->tag == DW_TAG_enumerator)
5828 /* Enumerators should not get the name of the enumeration as a prefix. */
5829 parent->scope = grandparent_scope;
5830 else if (parent->tag == DW_TAG_namespace
5831 || parent->tag == DW_TAG_module
5832 || parent->tag == DW_TAG_structure_type
5833 || parent->tag == DW_TAG_class_type
5834 || parent->tag == DW_TAG_interface_type
5835 || parent->tag == DW_TAG_union_type
5836 || parent->tag == DW_TAG_enumeration_type)
5838 if (grandparent_scope == NULL)
5839 parent->scope = parent->name;
5841 parent->scope = typename_concat (&cu->comp_unit_obstack,
5843 parent->name, 0, cu);
5847 /* FIXME drow/2004-04-01: What should we be doing with
5848 function-local names? For partial symbols, we should probably be
5850 complaint (&symfile_complaints,
5851 _("unhandled containing DIE tag %d for DIE at %d"),
5852 parent->tag, pdi->offset.sect_off);
5853 parent->scope = grandparent_scope;
5856 parent->scope_set = 1;
5857 return parent->scope;
5860 /* Return the fully scoped name associated with PDI, from compilation unit
5861 CU. The result will be allocated with malloc. */
5864 partial_die_full_name (struct partial_die_info *pdi,
5865 struct dwarf2_cu *cu)
5867 const char *parent_scope;
5869 /* If this is a template instantiation, we can not work out the
5870 template arguments from partial DIEs. So, unfortunately, we have
5871 to go through the full DIEs. At least any work we do building
5872 types here will be reused if full symbols are loaded later. */
5873 if (pdi->has_template_arguments)
5875 fixup_partial_die (pdi, cu);
5877 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
5879 struct die_info *die;
5880 struct attribute attr;
5881 struct dwarf2_cu *ref_cu = cu;
5883 /* DW_FORM_ref_addr is using section offset. */
5885 attr.form = DW_FORM_ref_addr;
5886 attr.u.unsnd = pdi->offset.sect_off;
5887 die = follow_die_ref (NULL, &attr, &ref_cu);
5889 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
5893 parent_scope = partial_die_parent_scope (pdi, cu);
5894 if (parent_scope == NULL)
5897 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
5901 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
5903 struct objfile *objfile = cu->objfile;
5905 const char *actual_name = NULL;
5907 char *built_actual_name;
5909 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5911 built_actual_name = partial_die_full_name (pdi, cu);
5912 if (built_actual_name != NULL)
5913 actual_name = built_actual_name;
5915 if (actual_name == NULL)
5916 actual_name = pdi->name;
5920 case DW_TAG_subprogram:
5921 if (pdi->is_external || cu->language == language_ada)
5923 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5924 of the global scope. But in Ada, we want to be able to access
5925 nested procedures globally. So all Ada subprograms are stored
5926 in the global scope. */
5927 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5928 mst_text, objfile); */
5929 add_psymbol_to_list (actual_name, strlen (actual_name),
5930 built_actual_name != NULL,
5931 VAR_DOMAIN, LOC_BLOCK,
5932 &objfile->global_psymbols,
5933 0, pdi->lowpc + baseaddr,
5934 cu->language, objfile);
5938 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5939 mst_file_text, objfile); */
5940 add_psymbol_to_list (actual_name, strlen (actual_name),
5941 built_actual_name != NULL,
5942 VAR_DOMAIN, LOC_BLOCK,
5943 &objfile->static_psymbols,
5944 0, pdi->lowpc + baseaddr,
5945 cu->language, objfile);
5948 case DW_TAG_constant:
5950 struct psymbol_allocation_list *list;
5952 if (pdi->is_external)
5953 list = &objfile->global_psymbols;
5955 list = &objfile->static_psymbols;
5956 add_psymbol_to_list (actual_name, strlen (actual_name),
5957 built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC,
5958 list, 0, 0, cu->language, objfile);
5961 case DW_TAG_variable:
5963 addr = decode_locdesc (pdi->d.locdesc, cu);
5967 && !dwarf2_per_objfile->has_section_at_zero)
5969 /* A global or static variable may also have been stripped
5970 out by the linker if unused, in which case its address
5971 will be nullified; do not add such variables into partial
5972 symbol table then. */
5974 else if (pdi->is_external)
5977 Don't enter into the minimal symbol tables as there is
5978 a minimal symbol table entry from the ELF symbols already.
5979 Enter into partial symbol table if it has a location
5980 descriptor or a type.
5981 If the location descriptor is missing, new_symbol will create
5982 a LOC_UNRESOLVED symbol, the address of the variable will then
5983 be determined from the minimal symbol table whenever the variable
5985 The address for the partial symbol table entry is not
5986 used by GDB, but it comes in handy for debugging partial symbol
5989 if (pdi->d.locdesc || pdi->has_type)
5990 add_psymbol_to_list (actual_name, strlen (actual_name),
5991 built_actual_name != NULL,
5992 VAR_DOMAIN, LOC_STATIC,
5993 &objfile->global_psymbols,
5995 cu->language, objfile);
5999 /* Static Variable. Skip symbols without location descriptors. */
6000 if (pdi->d.locdesc == NULL)
6002 xfree (built_actual_name);
6005 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6006 mst_file_data, objfile); */
6007 add_psymbol_to_list (actual_name, strlen (actual_name),
6008 built_actual_name != NULL,
6009 VAR_DOMAIN, LOC_STATIC,
6010 &objfile->static_psymbols,
6012 cu->language, objfile);
6015 case DW_TAG_typedef:
6016 case DW_TAG_base_type:
6017 case DW_TAG_subrange_type:
6018 add_psymbol_to_list (actual_name, strlen (actual_name),
6019 built_actual_name != NULL,
6020 VAR_DOMAIN, LOC_TYPEDEF,
6021 &objfile->static_psymbols,
6022 0, (CORE_ADDR) 0, cu->language, objfile);
6024 case DW_TAG_namespace:
6025 add_psymbol_to_list (actual_name, strlen (actual_name),
6026 built_actual_name != NULL,
6027 VAR_DOMAIN, LOC_TYPEDEF,
6028 &objfile->global_psymbols,
6029 0, (CORE_ADDR) 0, cu->language, objfile);
6031 case DW_TAG_class_type:
6032 case DW_TAG_interface_type:
6033 case DW_TAG_structure_type:
6034 case DW_TAG_union_type:
6035 case DW_TAG_enumeration_type:
6036 /* Skip external references. The DWARF standard says in the section
6037 about "Structure, Union, and Class Type Entries": "An incomplete
6038 structure, union or class type is represented by a structure,
6039 union or class entry that does not have a byte size attribute
6040 and that has a DW_AT_declaration attribute." */
6041 if (!pdi->has_byte_size && pdi->is_declaration)
6043 xfree (built_actual_name);
6047 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6048 static vs. global. */
6049 add_psymbol_to_list (actual_name, strlen (actual_name),
6050 built_actual_name != NULL,
6051 STRUCT_DOMAIN, LOC_TYPEDEF,
6052 (cu->language == language_cplus
6053 || cu->language == language_java)
6054 ? &objfile->global_psymbols
6055 : &objfile->static_psymbols,
6056 0, (CORE_ADDR) 0, cu->language, objfile);
6059 case DW_TAG_enumerator:
6060 add_psymbol_to_list (actual_name, strlen (actual_name),
6061 built_actual_name != NULL,
6062 VAR_DOMAIN, LOC_CONST,
6063 (cu->language == language_cplus
6064 || cu->language == language_java)
6065 ? &objfile->global_psymbols
6066 : &objfile->static_psymbols,
6067 0, (CORE_ADDR) 0, cu->language, objfile);
6073 xfree (built_actual_name);
6076 /* Read a partial die corresponding to a namespace; also, add a symbol
6077 corresponding to that namespace to the symbol table. NAMESPACE is
6078 the name of the enclosing namespace. */
6081 add_partial_namespace (struct partial_die_info *pdi,
6082 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6083 int need_pc, struct dwarf2_cu *cu)
6085 /* Add a symbol for the namespace. */
6087 add_partial_symbol (pdi, cu);
6089 /* Now scan partial symbols in that namespace. */
6091 if (pdi->has_children)
6092 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
6095 /* Read a partial die corresponding to a Fortran module. */
6098 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
6099 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
6101 /* Now scan partial symbols in that module. */
6103 if (pdi->has_children)
6104 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
6107 /* Read a partial die corresponding to a subprogram and create a partial
6108 symbol for that subprogram. When the CU language allows it, this
6109 routine also defines a partial symbol for each nested subprogram
6110 that this subprogram contains.
6112 DIE my also be a lexical block, in which case we simply search
6113 recursively for suprograms defined inside that lexical block.
6114 Again, this is only performed when the CU language allows this
6115 type of definitions. */
6118 add_partial_subprogram (struct partial_die_info *pdi,
6119 CORE_ADDR *lowpc, CORE_ADDR *highpc,
6120 int need_pc, struct dwarf2_cu *cu)
6122 if (pdi->tag == DW_TAG_subprogram)
6124 if (pdi->has_pc_info)
6126 if (pdi->lowpc < *lowpc)
6127 *lowpc = pdi->lowpc;
6128 if (pdi->highpc > *highpc)
6129 *highpc = pdi->highpc;
6133 struct objfile *objfile = cu->objfile;
6135 baseaddr = ANOFFSET (objfile->section_offsets,
6136 SECT_OFF_TEXT (objfile));
6137 addrmap_set_empty (objfile->psymtabs_addrmap,
6138 pdi->lowpc + baseaddr,
6139 pdi->highpc - 1 + baseaddr,
6140 cu->per_cu->v.psymtab);
6144 if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined))
6146 if (!pdi->is_declaration)
6147 /* Ignore subprogram DIEs that do not have a name, they are
6148 illegal. Do not emit a complaint at this point, we will
6149 do so when we convert this psymtab into a symtab. */
6151 add_partial_symbol (pdi, cu);
6155 if (! pdi->has_children)
6158 if (cu->language == language_ada)
6160 pdi = pdi->die_child;
6163 fixup_partial_die (pdi, cu);
6164 if (pdi->tag == DW_TAG_subprogram
6165 || pdi->tag == DW_TAG_lexical_block)
6166 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
6167 pdi = pdi->die_sibling;
6172 /* Read a partial die corresponding to an enumeration type. */
6175 add_partial_enumeration (struct partial_die_info *enum_pdi,
6176 struct dwarf2_cu *cu)
6178 struct partial_die_info *pdi;
6180 if (enum_pdi->name != NULL)
6181 add_partial_symbol (enum_pdi, cu);
6183 pdi = enum_pdi->die_child;
6186 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
6187 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6189 add_partial_symbol (pdi, cu);
6190 pdi = pdi->die_sibling;
6194 /* Return the initial uleb128 in the die at INFO_PTR. */
6197 peek_abbrev_code (bfd *abfd, gdb_byte *info_ptr)
6199 unsigned int bytes_read;
6201 return read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6204 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6205 Return the corresponding abbrev, or NULL if the number is zero (indicating
6206 an empty DIE). In either case *BYTES_READ will be set to the length of
6207 the initial number. */
6209 static struct abbrev_info *
6210 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
6211 struct dwarf2_cu *cu)
6213 bfd *abfd = cu->objfile->obfd;
6214 unsigned int abbrev_number;
6215 struct abbrev_info *abbrev;
6217 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
6219 if (abbrev_number == 0)
6222 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
6225 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6226 abbrev_number, bfd_get_filename (abfd));
6232 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6233 Returns a pointer to the end of a series of DIEs, terminated by an empty
6234 DIE. Any children of the skipped DIEs will also be skipped. */
6237 skip_children (const struct die_reader_specs *reader, gdb_byte *info_ptr)
6239 struct dwarf2_cu *cu = reader->cu;
6240 struct abbrev_info *abbrev;
6241 unsigned int bytes_read;
6245 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6247 return info_ptr + bytes_read;
6249 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
6253 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6254 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6255 abbrev corresponding to that skipped uleb128 should be passed in
6256 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6260 skip_one_die (const struct die_reader_specs *reader, gdb_byte *info_ptr,
6261 struct abbrev_info *abbrev)
6263 unsigned int bytes_read;
6264 struct attribute attr;
6265 bfd *abfd = reader->abfd;
6266 struct dwarf2_cu *cu = reader->cu;
6267 gdb_byte *buffer = reader->buffer;
6268 const gdb_byte *buffer_end = reader->buffer_end;
6269 gdb_byte *start_info_ptr = info_ptr;
6270 unsigned int form, i;
6272 for (i = 0; i < abbrev->num_attrs; i++)
6274 /* The only abbrev we care about is DW_AT_sibling. */
6275 if (abbrev->attrs[i].name == DW_AT_sibling)
6277 read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
6278 if (attr.form == DW_FORM_ref_addr)
6279 complaint (&symfile_complaints,
6280 _("ignoring absolute DW_AT_sibling"));
6282 return buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
6285 /* If it isn't DW_AT_sibling, skip this attribute. */
6286 form = abbrev->attrs[i].form;
6290 case DW_FORM_ref_addr:
6291 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6292 and later it is offset sized. */
6293 if (cu->header.version == 2)
6294 info_ptr += cu->header.addr_size;
6296 info_ptr += cu->header.offset_size;
6298 case DW_FORM_GNU_ref_alt:
6299 info_ptr += cu->header.offset_size;
6302 info_ptr += cu->header.addr_size;
6309 case DW_FORM_flag_present:
6321 case DW_FORM_ref_sig8:
6324 case DW_FORM_string:
6325 read_direct_string (abfd, info_ptr, &bytes_read);
6326 info_ptr += bytes_read;
6328 case DW_FORM_sec_offset:
6330 case DW_FORM_GNU_strp_alt:
6331 info_ptr += cu->header.offset_size;
6333 case DW_FORM_exprloc:
6335 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6336 info_ptr += bytes_read;
6338 case DW_FORM_block1:
6339 info_ptr += 1 + read_1_byte (abfd, info_ptr);
6341 case DW_FORM_block2:
6342 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
6344 case DW_FORM_block4:
6345 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
6349 case DW_FORM_ref_udata:
6350 case DW_FORM_GNU_addr_index:
6351 case DW_FORM_GNU_str_index:
6352 info_ptr = (gdb_byte *) safe_skip_leb128 (info_ptr, buffer_end);
6354 case DW_FORM_indirect:
6355 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6356 info_ptr += bytes_read;
6357 /* We need to continue parsing from here, so just go back to
6359 goto skip_attribute;
6362 error (_("Dwarf Error: Cannot handle %s "
6363 "in DWARF reader [in module %s]"),
6364 dwarf_form_name (form),
6365 bfd_get_filename (abfd));
6369 if (abbrev->has_children)
6370 return skip_children (reader, info_ptr);
6375 /* Locate ORIG_PDI's sibling.
6376 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6379 locate_pdi_sibling (const struct die_reader_specs *reader,
6380 struct partial_die_info *orig_pdi,
6383 /* Do we know the sibling already? */
6385 if (orig_pdi->sibling)
6386 return orig_pdi->sibling;
6388 /* Are there any children to deal with? */
6390 if (!orig_pdi->has_children)
6393 /* Skip the children the long way. */
6395 return skip_children (reader, info_ptr);
6398 /* Expand this partial symbol table into a full symbol table. SELF is
6402 dwarf2_read_symtab (struct partial_symtab *self,
6403 struct objfile *objfile)
6407 warning (_("bug: psymtab for %s is already read in."),
6414 printf_filtered (_("Reading in symbols for %s..."),
6416 gdb_flush (gdb_stdout);
6419 /* Restore our global data. */
6420 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
6422 /* If this psymtab is constructed from a debug-only objfile, the
6423 has_section_at_zero flag will not necessarily be correct. We
6424 can get the correct value for this flag by looking at the data
6425 associated with the (presumably stripped) associated objfile. */
6426 if (objfile->separate_debug_objfile_backlink)
6428 struct dwarf2_per_objfile *dpo_backlink
6429 = objfile_data (objfile->separate_debug_objfile_backlink,
6430 dwarf2_objfile_data_key);
6432 dwarf2_per_objfile->has_section_at_zero
6433 = dpo_backlink->has_section_at_zero;
6436 dwarf2_per_objfile->reading_partial_symbols = 0;
6438 psymtab_to_symtab_1 (self);
6440 /* Finish up the debug error message. */
6442 printf_filtered (_("done.\n"));
6445 process_cu_includes ();
6448 /* Reading in full CUs. */
6450 /* Add PER_CU to the queue. */
6453 queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
6454 enum language pretend_language)
6456 struct dwarf2_queue_item *item;
6459 item = xmalloc (sizeof (*item));
6460 item->per_cu = per_cu;
6461 item->pretend_language = pretend_language;
6464 if (dwarf2_queue == NULL)
6465 dwarf2_queue = item;
6467 dwarf2_queue_tail->next = item;
6469 dwarf2_queue_tail = item;
6472 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6473 unit and add it to our queue.
6474 The result is non-zero if PER_CU was queued, otherwise the result is zero
6475 meaning either PER_CU is already queued or it is already loaded. */
6478 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
6479 struct dwarf2_per_cu_data *per_cu,
6480 enum language pretend_language)
6482 /* We may arrive here during partial symbol reading, if we need full
6483 DIEs to process an unusual case (e.g. template arguments). Do
6484 not queue PER_CU, just tell our caller to load its DIEs. */
6485 if (dwarf2_per_objfile->reading_partial_symbols)
6487 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
6492 /* Mark the dependence relation so that we don't flush PER_CU
6494 dwarf2_add_dependence (this_cu, per_cu);
6496 /* If it's already on the queue, we have nothing to do. */
6500 /* If the compilation unit is already loaded, just mark it as
6502 if (per_cu->cu != NULL)
6504 per_cu->cu->last_used = 0;
6508 /* Add it to the queue. */
6509 queue_comp_unit (per_cu, pretend_language);
6514 /* Process the queue. */
6517 process_queue (void)
6519 struct dwarf2_queue_item *item, *next_item;
6521 if (dwarf2_read_debug)
6523 fprintf_unfiltered (gdb_stdlog,
6524 "Expanding one or more symtabs of objfile %s ...\n",
6525 dwarf2_per_objfile->objfile->name);
6528 /* The queue starts out with one item, but following a DIE reference
6529 may load a new CU, adding it to the end of the queue. */
6530 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
6532 if (dwarf2_per_objfile->using_index
6533 ? !item->per_cu->v.quick->symtab
6534 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
6536 struct dwarf2_per_cu_data *per_cu = item->per_cu;
6538 if (dwarf2_read_debug)
6540 fprintf_unfiltered (gdb_stdlog,
6541 "Expanding symtab of %s at offset 0x%x\n",
6542 per_cu->is_debug_types ? "TU" : "CU",
6543 per_cu->offset.sect_off);
6546 if (per_cu->is_debug_types)
6547 process_full_type_unit (per_cu, item->pretend_language);
6549 process_full_comp_unit (per_cu, item->pretend_language);
6551 if (dwarf2_read_debug)
6553 fprintf_unfiltered (gdb_stdlog,
6554 "Done expanding %s at offset 0x%x\n",
6555 per_cu->is_debug_types ? "TU" : "CU",
6556 per_cu->offset.sect_off);
6560 item->per_cu->queued = 0;
6561 next_item = item->next;
6565 dwarf2_queue_tail = NULL;
6567 if (dwarf2_read_debug)
6569 fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n",
6570 dwarf2_per_objfile->objfile->name);
6574 /* Free all allocated queue entries. This function only releases anything if
6575 an error was thrown; if the queue was processed then it would have been
6576 freed as we went along. */
6579 dwarf2_release_queue (void *dummy)
6581 struct dwarf2_queue_item *item, *last;
6583 item = dwarf2_queue;
6586 /* Anything still marked queued is likely to be in an
6587 inconsistent state, so discard it. */
6588 if (item->per_cu->queued)
6590 if (item->per_cu->cu != NULL)
6591 free_one_cached_comp_unit (item->per_cu);
6592 item->per_cu->queued = 0;
6600 dwarf2_queue = dwarf2_queue_tail = NULL;
6603 /* Read in full symbols for PST, and anything it depends on. */
6606 psymtab_to_symtab_1 (struct partial_symtab *pst)
6608 struct dwarf2_per_cu_data *per_cu;
6614 for (i = 0; i < pst->number_of_dependencies; i++)
6615 if (!pst->dependencies[i]->readin
6616 && pst->dependencies[i]->user == NULL)
6618 /* Inform about additional files that need to be read in. */
6621 /* FIXME: i18n: Need to make this a single string. */
6622 fputs_filtered (" ", gdb_stdout);
6624 fputs_filtered ("and ", gdb_stdout);
6626 printf_filtered ("%s...", pst->dependencies[i]->filename);
6627 wrap_here (""); /* Flush output. */
6628 gdb_flush (gdb_stdout);
6630 psymtab_to_symtab_1 (pst->dependencies[i]);
6633 per_cu = pst->read_symtab_private;
6637 /* It's an include file, no symbols to read for it.
6638 Everything is in the parent symtab. */
6643 dw2_do_instantiate_symtab (per_cu);
6646 /* Trivial hash function for die_info: the hash value of a DIE
6647 is its offset in .debug_info for this objfile. */
6650 die_hash (const void *item)
6652 const struct die_info *die = item;
6654 return die->offset.sect_off;
6657 /* Trivial comparison function for die_info structures: two DIEs
6658 are equal if they have the same offset. */
6661 die_eq (const void *item_lhs, const void *item_rhs)
6663 const struct die_info *die_lhs = item_lhs;
6664 const struct die_info *die_rhs = item_rhs;
6666 return die_lhs->offset.sect_off == die_rhs->offset.sect_off;
6669 /* die_reader_func for load_full_comp_unit.
6670 This is identical to read_signatured_type_reader,
6671 but is kept separate for now. */
6674 load_full_comp_unit_reader (const struct die_reader_specs *reader,
6676 struct die_info *comp_unit_die,
6680 struct dwarf2_cu *cu = reader->cu;
6681 enum language *language_ptr = data;
6683 gdb_assert (cu->die_hash == NULL);
6685 htab_create_alloc_ex (cu->header.length / 12,
6689 &cu->comp_unit_obstack,
6690 hashtab_obstack_allocate,
6691 dummy_obstack_deallocate);
6694 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
6695 &info_ptr, comp_unit_die);
6696 cu->dies = comp_unit_die;
6697 /* comp_unit_die is not stored in die_hash, no need. */
6699 /* We try not to read any attributes in this function, because not
6700 all CUs needed for references have been loaded yet, and symbol
6701 table processing isn't initialized. But we have to set the CU language,
6702 or we won't be able to build types correctly.
6703 Similarly, if we do not read the producer, we can not apply
6704 producer-specific interpretation. */
6705 prepare_one_comp_unit (cu, cu->dies, *language_ptr);
6708 /* Load the DIEs associated with PER_CU into memory. */
6711 load_full_comp_unit (struct dwarf2_per_cu_data *this_cu,
6712 enum language pretend_language)
6714 gdb_assert (! this_cu->is_debug_types);
6716 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
6717 load_full_comp_unit_reader, &pretend_language);
6720 /* Add a DIE to the delayed physname list. */
6723 add_to_method_list (struct type *type, int fnfield_index, int index,
6724 const char *name, struct die_info *die,
6725 struct dwarf2_cu *cu)
6727 struct delayed_method_info mi;
6729 mi.fnfield_index = fnfield_index;
6733 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
6736 /* A cleanup for freeing the delayed method list. */
6739 free_delayed_list (void *ptr)
6741 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
6742 if (cu->method_list != NULL)
6744 VEC_free (delayed_method_info, cu->method_list);
6745 cu->method_list = NULL;
6749 /* Compute the physnames of any methods on the CU's method list.
6751 The computation of method physnames is delayed in order to avoid the
6752 (bad) condition that one of the method's formal parameters is of an as yet
6756 compute_delayed_physnames (struct dwarf2_cu *cu)
6759 struct delayed_method_info *mi;
6760 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
6762 const char *physname;
6763 struct fn_fieldlist *fn_flp
6764 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
6765 physname = dwarf2_physname (mi->name, mi->die, cu);
6766 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
6770 /* Go objects should be embedded in a DW_TAG_module DIE,
6771 and it's not clear if/how imported objects will appear.
6772 To keep Go support simple until that's worked out,
6773 go back through what we've read and create something usable.
6774 We could do this while processing each DIE, and feels kinda cleaner,
6775 but that way is more invasive.
6776 This is to, for example, allow the user to type "p var" or "b main"
6777 without having to specify the package name, and allow lookups
6778 of module.object to work in contexts that use the expression
6782 fixup_go_packaging (struct dwarf2_cu *cu)
6784 char *package_name = NULL;
6785 struct pending *list;
6788 for (list = global_symbols; list != NULL; list = list->next)
6790 for (i = 0; i < list->nsyms; ++i)
6792 struct symbol *sym = list->symbol[i];
6794 if (SYMBOL_LANGUAGE (sym) == language_go
6795 && SYMBOL_CLASS (sym) == LOC_BLOCK)
6797 char *this_package_name = go_symbol_package_name (sym);
6799 if (this_package_name == NULL)
6801 if (package_name == NULL)
6802 package_name = this_package_name;
6805 if (strcmp (package_name, this_package_name) != 0)
6806 complaint (&symfile_complaints,
6807 _("Symtab %s has objects from two different Go packages: %s and %s"),
6808 (SYMBOL_SYMTAB (sym)
6809 ? SYMBOL_SYMTAB (sym)->filename
6810 : cu->objfile->name),
6811 this_package_name, package_name);
6812 xfree (this_package_name);
6818 if (package_name != NULL)
6820 struct objfile *objfile = cu->objfile;
6821 const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack,
6823 strlen (package_name));
6824 struct type *type = init_type (TYPE_CODE_MODULE, 0, 0,
6825 saved_package_name, objfile);
6828 TYPE_TAG_NAME (type) = TYPE_NAME (type);
6830 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
6831 SYMBOL_SET_LANGUAGE (sym, language_go);
6832 SYMBOL_SET_NAMES (sym, saved_package_name,
6833 strlen (saved_package_name), 0, objfile);
6834 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6835 e.g., "main" finds the "main" module and not C's main(). */
6836 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
6837 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
6838 SYMBOL_TYPE (sym) = type;
6840 add_symbol_to_list (sym, &global_symbols);
6842 xfree (package_name);
6846 static void compute_symtab_includes (struct dwarf2_per_cu_data *per_cu);
6848 /* Return the symtab for PER_CU. This works properly regardless of
6849 whether we're using the index or psymtabs. */
6851 static struct symtab *
6852 get_symtab (struct dwarf2_per_cu_data *per_cu)
6854 return (dwarf2_per_objfile->using_index
6855 ? per_cu->v.quick->symtab
6856 : per_cu->v.psymtab->symtab);
6859 /* A helper function for computing the list of all symbol tables
6860 included by PER_CU. */
6863 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result,
6864 htab_t all_children,
6865 struct dwarf2_per_cu_data *per_cu)
6869 struct dwarf2_per_cu_data *iter;
6871 slot = htab_find_slot (all_children, per_cu, INSERT);
6874 /* This inclusion and its children have been processed. */
6879 /* Only add a CU if it has a symbol table. */
6880 if (get_symtab (per_cu) != NULL)
6881 VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu);
6884 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter);
6886 recursively_compute_inclusions (result, all_children, iter);
6889 /* Compute the symtab 'includes' fields for the symtab related to
6893 compute_symtab_includes (struct dwarf2_per_cu_data *per_cu)
6895 gdb_assert (! per_cu->is_debug_types);
6897 if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs))
6900 struct dwarf2_per_cu_data *iter;
6901 VEC (dwarf2_per_cu_ptr) *result_children = NULL;
6902 htab_t all_children;
6903 struct symtab *symtab = get_symtab (per_cu);
6905 /* If we don't have a symtab, we can just skip this case. */
6909 all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
6910 NULL, xcalloc, xfree);
6913 VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs,
6916 recursively_compute_inclusions (&result_children, all_children, iter);
6918 /* Now we have a transitive closure of all the included CUs, and
6919 for .gdb_index version 7 the included TUs, so we can convert it
6920 to a list of symtabs. */
6921 len = VEC_length (dwarf2_per_cu_ptr, result_children);
6923 = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack,
6924 (len + 1) * sizeof (struct symtab *));
6926 VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter);
6928 symtab->includes[ix] = get_symtab (iter);
6929 symtab->includes[len] = NULL;
6931 VEC_free (dwarf2_per_cu_ptr, result_children);
6932 htab_delete (all_children);
6936 /* Compute the 'includes' field for the symtabs of all the CUs we just
6940 process_cu_includes (void)
6943 struct dwarf2_per_cu_data *iter;
6946 VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus,
6950 if (! iter->is_debug_types)
6951 compute_symtab_includes (iter);
6954 VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus);
6957 /* Generate full symbol information for PER_CU, whose DIEs have
6958 already been loaded into memory. */
6961 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
6962 enum language pretend_language)
6964 struct dwarf2_cu *cu = per_cu->cu;
6965 struct objfile *objfile = per_cu->objfile;
6966 CORE_ADDR lowpc, highpc;
6967 struct symtab *symtab;
6968 struct cleanup *back_to, *delayed_list_cleanup;
6970 struct block *static_block;
6972 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6975 back_to = make_cleanup (really_free_pendings, NULL);
6976 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
6978 cu->list_in_scope = &file_symbols;
6980 cu->language = pretend_language;
6981 cu->language_defn = language_def (cu->language);
6983 /* Do line number decoding in read_file_scope () */
6984 process_die (cu->dies, cu);
6986 /* For now fudge the Go package. */
6987 if (cu->language == language_go)
6988 fixup_go_packaging (cu);
6990 /* Now that we have processed all the DIEs in the CU, all the types
6991 should be complete, and it should now be safe to compute all of the
6993 compute_delayed_physnames (cu);
6994 do_cleanups (delayed_list_cleanup);
6996 /* Some compilers don't define a DW_AT_high_pc attribute for the
6997 compilation unit. If the DW_AT_high_pc is missing, synthesize
6998 it, by scanning the DIE's below the compilation unit. */
6999 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
7002 = end_symtab_get_static_block (highpc + baseaddr, objfile, 0,
7003 per_cu->imported_symtabs != NULL);
7005 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7006 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7007 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7008 addrmap to help ensure it has an accurate map of pc values belonging to
7010 dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu);
7012 symtab = end_symtab_from_static_block (static_block, objfile,
7013 SECT_OFF_TEXT (objfile), 0);
7017 int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer);
7019 /* Set symtab language to language from DW_AT_language. If the
7020 compilation is from a C file generated by language preprocessors, do
7021 not set the language if it was already deduced by start_subfile. */
7022 if (!(cu->language == language_c && symtab->language != language_c))
7023 symtab->language = cu->language;
7025 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7026 produce DW_AT_location with location lists but it can be possibly
7027 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7028 there were bugs in prologue debug info, fixed later in GCC-4.5
7029 by "unwind info for epilogues" patch (which is not directly related).
7031 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7032 needed, it would be wrong due to missing DW_AT_producer there.
7034 Still one can confuse GDB by using non-standard GCC compilation
7035 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7037 if (cu->has_loclist && gcc_4_minor >= 5)
7038 symtab->locations_valid = 1;
7040 if (gcc_4_minor >= 5)
7041 symtab->epilogue_unwind_valid = 1;
7043 symtab->call_site_htab = cu->call_site_htab;
7046 if (dwarf2_per_objfile->using_index)
7047 per_cu->v.quick->symtab = symtab;
7050 struct partial_symtab *pst = per_cu->v.psymtab;
7051 pst->symtab = symtab;
7055 /* Push it for inclusion processing later. */
7056 VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu);
7058 do_cleanups (back_to);
7061 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7062 already been loaded into memory. */
7065 process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
7066 enum language pretend_language)
7068 struct dwarf2_cu *cu = per_cu->cu;
7069 struct objfile *objfile = per_cu->objfile;
7070 struct symtab *symtab;
7071 struct cleanup *back_to, *delayed_list_cleanup;
7074 back_to = make_cleanup (really_free_pendings, NULL);
7075 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
7077 cu->list_in_scope = &file_symbols;
7079 cu->language = pretend_language;
7080 cu->language_defn = language_def (cu->language);
7082 /* The symbol tables are set up in read_type_unit_scope. */
7083 process_die (cu->dies, cu);
7085 /* For now fudge the Go package. */
7086 if (cu->language == language_go)
7087 fixup_go_packaging (cu);
7089 /* Now that we have processed all the DIEs in the CU, all the types
7090 should be complete, and it should now be safe to compute all of the
7092 compute_delayed_physnames (cu);
7093 do_cleanups (delayed_list_cleanup);
7095 /* TUs share symbol tables.
7096 If this is the first TU to use this symtab, complete the construction
7097 of it with end_expandable_symtab. Otherwise, complete the addition of
7098 this TU's symbols to the existing symtab. */
7099 if (per_cu->type_unit_group->primary_symtab == NULL)
7101 symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
7102 per_cu->type_unit_group->primary_symtab = symtab;
7106 /* Set symtab language to language from DW_AT_language. If the
7107 compilation is from a C file generated by language preprocessors,
7108 do not set the language if it was already deduced by
7110 if (!(cu->language == language_c && symtab->language != language_c))
7111 symtab->language = cu->language;
7116 augment_type_symtab (objfile,
7117 per_cu->type_unit_group->primary_symtab);
7118 symtab = per_cu->type_unit_group->primary_symtab;
7121 if (dwarf2_per_objfile->using_index)
7122 per_cu->v.quick->symtab = symtab;
7125 struct partial_symtab *pst = per_cu->v.psymtab;
7126 pst->symtab = symtab;
7130 do_cleanups (back_to);
7133 /* Process an imported unit DIE. */
7136 process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
7138 struct attribute *attr;
7140 /* For now we don't handle imported units in type units. */
7141 if (cu->per_cu->is_debug_types)
7143 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7144 " supported in type units [in module %s]"),
7148 attr = dwarf2_attr (die, DW_AT_import, cu);
7151 struct dwarf2_per_cu_data *per_cu;
7152 struct symtab *imported_symtab;
7156 offset = dwarf2_get_ref_die_offset (attr);
7157 is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz);
7158 per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile);
7160 /* Queue the unit, if needed. */
7161 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
7162 load_full_comp_unit (per_cu, cu->language);
7164 VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
7169 /* Process a die and its children. */
7172 process_die (struct die_info *die, struct dwarf2_cu *cu)
7176 case DW_TAG_padding:
7178 case DW_TAG_compile_unit:
7179 case DW_TAG_partial_unit:
7180 read_file_scope (die, cu);
7182 case DW_TAG_type_unit:
7183 read_type_unit_scope (die, cu);
7185 case DW_TAG_subprogram:
7186 case DW_TAG_inlined_subroutine:
7187 read_func_scope (die, cu);
7189 case DW_TAG_lexical_block:
7190 case DW_TAG_try_block:
7191 case DW_TAG_catch_block:
7192 read_lexical_block_scope (die, cu);
7194 case DW_TAG_GNU_call_site:
7195 read_call_site_scope (die, cu);
7197 case DW_TAG_class_type:
7198 case DW_TAG_interface_type:
7199 case DW_TAG_structure_type:
7200 case DW_TAG_union_type:
7201 process_structure_scope (die, cu);
7203 case DW_TAG_enumeration_type:
7204 process_enumeration_scope (die, cu);
7207 /* These dies have a type, but processing them does not create
7208 a symbol or recurse to process the children. Therefore we can
7209 read them on-demand through read_type_die. */
7210 case DW_TAG_subroutine_type:
7211 case DW_TAG_set_type:
7212 case DW_TAG_array_type:
7213 case DW_TAG_pointer_type:
7214 case DW_TAG_ptr_to_member_type:
7215 case DW_TAG_reference_type:
7216 case DW_TAG_string_type:
7219 case DW_TAG_base_type:
7220 case DW_TAG_subrange_type:
7221 case DW_TAG_typedef:
7222 /* Add a typedef symbol for the type definition, if it has a
7224 new_symbol (die, read_type_die (die, cu), cu);
7226 case DW_TAG_common_block:
7227 read_common_block (die, cu);
7229 case DW_TAG_common_inclusion:
7231 case DW_TAG_namespace:
7232 cu->processing_has_namespace_info = 1;
7233 read_namespace (die, cu);
7236 cu->processing_has_namespace_info = 1;
7237 read_module (die, cu);
7239 case DW_TAG_imported_declaration:
7240 case DW_TAG_imported_module:
7241 cu->processing_has_namespace_info = 1;
7242 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
7243 || cu->language != language_fortran))
7244 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
7245 dwarf_tag_name (die->tag));
7246 read_import_statement (die, cu);
7249 case DW_TAG_imported_unit:
7250 process_imported_unit_die (die, cu);
7254 new_symbol (die, NULL, cu);
7259 /* A helper function for dwarf2_compute_name which determines whether DIE
7260 needs to have the name of the scope prepended to the name listed in the
7264 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
7266 struct attribute *attr;
7270 case DW_TAG_namespace:
7271 case DW_TAG_typedef:
7272 case DW_TAG_class_type:
7273 case DW_TAG_interface_type:
7274 case DW_TAG_structure_type:
7275 case DW_TAG_union_type:
7276 case DW_TAG_enumeration_type:
7277 case DW_TAG_enumerator:
7278 case DW_TAG_subprogram:
7282 case DW_TAG_variable:
7283 case DW_TAG_constant:
7284 /* We only need to prefix "globally" visible variables. These include
7285 any variable marked with DW_AT_external or any variable that
7286 lives in a namespace. [Variables in anonymous namespaces
7287 require prefixing, but they are not DW_AT_external.] */
7289 if (dwarf2_attr (die, DW_AT_specification, cu))
7291 struct dwarf2_cu *spec_cu = cu;
7293 return die_needs_namespace (die_specification (die, &spec_cu),
7297 attr = dwarf2_attr (die, DW_AT_external, cu);
7298 if (attr == NULL && die->parent->tag != DW_TAG_namespace
7299 && die->parent->tag != DW_TAG_module)
7301 /* A variable in a lexical block of some kind does not need a
7302 namespace, even though in C++ such variables may be external
7303 and have a mangled name. */
7304 if (die->parent->tag == DW_TAG_lexical_block
7305 || die->parent->tag == DW_TAG_try_block
7306 || die->parent->tag == DW_TAG_catch_block
7307 || die->parent->tag == DW_TAG_subprogram)
7316 /* Retrieve the last character from a mem_file. */
7319 do_ui_file_peek_last (void *object, const char *buffer, long length)
7321 char *last_char_p = (char *) object;
7324 *last_char_p = buffer[length - 1];
7327 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7328 compute the physname for the object, which include a method's:
7329 - formal parameters (C++/Java),
7330 - receiver type (Go),
7331 - return type (Java).
7333 The term "physname" is a bit confusing.
7334 For C++, for example, it is the demangled name.
7335 For Go, for example, it's the mangled name.
7337 For Ada, return the DIE's linkage name rather than the fully qualified
7338 name. PHYSNAME is ignored..
7340 The result is allocated on the objfile_obstack and canonicalized. */
7343 dwarf2_compute_name (const char *name,
7344 struct die_info *die, struct dwarf2_cu *cu,
7347 struct objfile *objfile = cu->objfile;
7350 name = dwarf2_name (die, cu);
7352 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7353 compute it by typename_concat inside GDB. */
7354 if (cu->language == language_ada
7355 || (cu->language == language_fortran && physname))
7357 /* For Ada unit, we prefer the linkage name over the name, as
7358 the former contains the exported name, which the user expects
7359 to be able to reference. Ideally, we want the user to be able
7360 to reference this entity using either natural or linkage name,
7361 but we haven't started looking at this enhancement yet. */
7362 struct attribute *attr;
7364 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
7366 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7367 if (attr && DW_STRING (attr))
7368 return DW_STRING (attr);
7371 /* These are the only languages we know how to qualify names in. */
7373 && (cu->language == language_cplus || cu->language == language_java
7374 || cu->language == language_fortran))
7376 if (die_needs_namespace (die, cu))
7380 struct ui_file *buf;
7382 prefix = determine_prefix (die, cu);
7383 buf = mem_fileopen ();
7384 if (*prefix != '\0')
7386 char *prefixed_name = typename_concat (NULL, prefix, name,
7389 fputs_unfiltered (prefixed_name, buf);
7390 xfree (prefixed_name);
7393 fputs_unfiltered (name, buf);
7395 /* Template parameters may be specified in the DIE's DW_AT_name, or
7396 as children with DW_TAG_template_type_param or
7397 DW_TAG_value_type_param. If the latter, add them to the name
7398 here. If the name already has template parameters, then
7399 skip this step; some versions of GCC emit both, and
7400 it is more efficient to use the pre-computed name.
7402 Something to keep in mind about this process: it is very
7403 unlikely, or in some cases downright impossible, to produce
7404 something that will match the mangled name of a function.
7405 If the definition of the function has the same debug info,
7406 we should be able to match up with it anyway. But fallbacks
7407 using the minimal symbol, for instance to find a method
7408 implemented in a stripped copy of libstdc++, will not work.
7409 If we do not have debug info for the definition, we will have to
7410 match them up some other way.
7412 When we do name matching there is a related problem with function
7413 templates; two instantiated function templates are allowed to
7414 differ only by their return types, which we do not add here. */
7416 if (cu->language == language_cplus && strchr (name, '<') == NULL)
7418 struct attribute *attr;
7419 struct die_info *child;
7422 die->building_fullname = 1;
7424 for (child = die->child; child != NULL; child = child->sibling)
7429 struct dwarf2_locexpr_baton *baton;
7432 if (child->tag != DW_TAG_template_type_param
7433 && child->tag != DW_TAG_template_value_param)
7438 fputs_unfiltered ("<", buf);
7442 fputs_unfiltered (", ", buf);
7444 attr = dwarf2_attr (child, DW_AT_type, cu);
7447 complaint (&symfile_complaints,
7448 _("template parameter missing DW_AT_type"));
7449 fputs_unfiltered ("UNKNOWN_TYPE", buf);
7452 type = die_type (child, cu);
7454 if (child->tag == DW_TAG_template_type_param)
7456 c_print_type (type, "", buf, -1, 0, &type_print_raw_options);
7460 attr = dwarf2_attr (child, DW_AT_const_value, cu);
7463 complaint (&symfile_complaints,
7464 _("template parameter missing "
7465 "DW_AT_const_value"));
7466 fputs_unfiltered ("UNKNOWN_VALUE", buf);
7470 dwarf2_const_value_attr (attr, type, name,
7471 &cu->comp_unit_obstack, cu,
7472 &value, &bytes, &baton);
7474 if (TYPE_NOSIGN (type))
7475 /* GDB prints characters as NUMBER 'CHAR'. If that's
7476 changed, this can use value_print instead. */
7477 c_printchar (value, type, buf);
7480 struct value_print_options opts;
7483 v = dwarf2_evaluate_loc_desc (type, NULL,
7487 else if (bytes != NULL)
7489 v = allocate_value (type);
7490 memcpy (value_contents_writeable (v), bytes,
7491 TYPE_LENGTH (type));
7494 v = value_from_longest (type, value);
7496 /* Specify decimal so that we do not depend on
7498 get_formatted_print_options (&opts, 'd');
7500 value_print (v, buf, &opts);
7506 die->building_fullname = 0;
7510 /* Close the argument list, with a space if necessary
7511 (nested templates). */
7512 char last_char = '\0';
7513 ui_file_put (buf, do_ui_file_peek_last, &last_char);
7514 if (last_char == '>')
7515 fputs_unfiltered (" >", buf);
7517 fputs_unfiltered (">", buf);
7521 /* For Java and C++ methods, append formal parameter type
7522 information, if PHYSNAME. */
7524 if (physname && die->tag == DW_TAG_subprogram
7525 && (cu->language == language_cplus
7526 || cu->language == language_java))
7528 struct type *type = read_type_die (die, cu);
7530 c_type_print_args (type, buf, 1, cu->language,
7531 &type_print_raw_options);
7533 if (cu->language == language_java)
7535 /* For java, we must append the return type to method
7537 if (die->tag == DW_TAG_subprogram)
7538 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
7539 0, 0, &type_print_raw_options);
7541 else if (cu->language == language_cplus)
7543 /* Assume that an artificial first parameter is
7544 "this", but do not crash if it is not. RealView
7545 marks unnamed (and thus unused) parameters as
7546 artificial; there is no way to differentiate
7548 if (TYPE_NFIELDS (type) > 0
7549 && TYPE_FIELD_ARTIFICIAL (type, 0)
7550 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
7551 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type,
7553 fputs_unfiltered (" const", buf);
7557 name = ui_file_obsavestring (buf, &objfile->objfile_obstack,
7559 ui_file_delete (buf);
7561 if (cu->language == language_cplus)
7564 = dwarf2_canonicalize_name (name, cu,
7565 &objfile->objfile_obstack);
7576 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7577 If scope qualifiers are appropriate they will be added. The result
7578 will be allocated on the objfile_obstack, or NULL if the DIE does
7579 not have a name. NAME may either be from a previous call to
7580 dwarf2_name or NULL.
7582 The output string will be canonicalized (if C++/Java). */
7585 dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu)
7587 return dwarf2_compute_name (name, die, cu, 0);
7590 /* Construct a physname for the given DIE in CU. NAME may either be
7591 from a previous call to dwarf2_name or NULL. The result will be
7592 allocated on the objfile_objstack or NULL if the DIE does not have a
7595 The output string will be canonicalized (if C++/Java). */
7598 dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu)
7600 struct objfile *objfile = cu->objfile;
7601 struct attribute *attr;
7602 const char *retval, *mangled = NULL, *canon = NULL;
7603 struct cleanup *back_to;
7606 /* In this case dwarf2_compute_name is just a shortcut not building anything
7608 if (!die_needs_namespace (die, cu))
7609 return dwarf2_compute_name (name, die, cu, 1);
7611 back_to = make_cleanup (null_cleanup, NULL);
7613 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
7615 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7617 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7619 if (attr && DW_STRING (attr))
7623 mangled = DW_STRING (attr);
7625 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7626 type. It is easier for GDB users to search for such functions as
7627 `name(params)' than `long name(params)'. In such case the minimal
7628 symbol names do not match the full symbol names but for template
7629 functions there is never a need to look up their definition from their
7630 declaration so the only disadvantage remains the minimal symbol
7631 variant `long name(params)' does not have the proper inferior type.
7634 if (cu->language == language_go)
7636 /* This is a lie, but we already lie to the caller new_symbol_full.
7637 new_symbol_full assumes we return the mangled name.
7638 This just undoes that lie until things are cleaned up. */
7643 demangled = cplus_demangle (mangled,
7644 (DMGL_PARAMS | DMGL_ANSI
7645 | (cu->language == language_java
7646 ? DMGL_JAVA | DMGL_RET_POSTFIX
7651 make_cleanup (xfree, demangled);
7661 if (canon == NULL || check_physname)
7663 const char *physname = dwarf2_compute_name (name, die, cu, 1);
7665 if (canon != NULL && strcmp (physname, canon) != 0)
7667 /* It may not mean a bug in GDB. The compiler could also
7668 compute DW_AT_linkage_name incorrectly. But in such case
7669 GDB would need to be bug-to-bug compatible. */
7671 complaint (&symfile_complaints,
7672 _("Computed physname <%s> does not match demangled <%s> "
7673 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7674 physname, canon, mangled, die->offset.sect_off, objfile->name);
7676 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7677 is available here - over computed PHYSNAME. It is safer
7678 against both buggy GDB and buggy compilers. */
7692 retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval));
7694 do_cleanups (back_to);
7698 /* Read the import statement specified by the given die and record it. */
7701 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
7703 struct objfile *objfile = cu->objfile;
7704 struct attribute *import_attr;
7705 struct die_info *imported_die, *child_die;
7706 struct dwarf2_cu *imported_cu;
7707 const char *imported_name;
7708 const char *imported_name_prefix;
7709 const char *canonical_name;
7710 const char *import_alias;
7711 const char *imported_declaration = NULL;
7712 const char *import_prefix;
7713 VEC (const_char_ptr) *excludes = NULL;
7714 struct cleanup *cleanups;
7716 import_attr = dwarf2_attr (die, DW_AT_import, cu);
7717 if (import_attr == NULL)
7719 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
7720 dwarf_tag_name (die->tag));
7725 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
7726 imported_name = dwarf2_name (imported_die, imported_cu);
7727 if (imported_name == NULL)
7729 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7731 The import in the following code:
7745 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7746 <52> DW_AT_decl_file : 1
7747 <53> DW_AT_decl_line : 6
7748 <54> DW_AT_import : <0x75>
7749 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7751 <5b> DW_AT_decl_file : 1
7752 <5c> DW_AT_decl_line : 2
7753 <5d> DW_AT_type : <0x6e>
7755 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7756 <76> DW_AT_byte_size : 4
7757 <77> DW_AT_encoding : 5 (signed)
7759 imports the wrong die ( 0x75 instead of 0x58 ).
7760 This case will be ignored until the gcc bug is fixed. */
7764 /* Figure out the local name after import. */
7765 import_alias = dwarf2_name (die, cu);
7767 /* Figure out where the statement is being imported to. */
7768 import_prefix = determine_prefix (die, cu);
7770 /* Figure out what the scope of the imported die is and prepend it
7771 to the name of the imported die. */
7772 imported_name_prefix = determine_prefix (imported_die, imported_cu);
7774 if (imported_die->tag != DW_TAG_namespace
7775 && imported_die->tag != DW_TAG_module)
7777 imported_declaration = imported_name;
7778 canonical_name = imported_name_prefix;
7780 else if (strlen (imported_name_prefix) > 0)
7781 canonical_name = obconcat (&objfile->objfile_obstack,
7782 imported_name_prefix, "::", imported_name,
7785 canonical_name = imported_name;
7787 cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes);
7789 if (die->tag == DW_TAG_imported_module && cu->language == language_fortran)
7790 for (child_die = die->child; child_die && child_die->tag;
7791 child_die = sibling_die (child_die))
7793 /* DWARF-4: A Fortran use statement with a “rename list” may be
7794 represented by an imported module entry with an import attribute
7795 referring to the module and owned entries corresponding to those
7796 entities that are renamed as part of being imported. */
7798 if (child_die->tag != DW_TAG_imported_declaration)
7800 complaint (&symfile_complaints,
7801 _("child DW_TAG_imported_declaration expected "
7802 "- DIE at 0x%x [in module %s]"),
7803 child_die->offset.sect_off, objfile->name);
7807 import_attr = dwarf2_attr (child_die, DW_AT_import, cu);
7808 if (import_attr == NULL)
7810 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
7811 dwarf_tag_name (child_die->tag));
7816 imported_die = follow_die_ref_or_sig (child_die, import_attr,
7818 imported_name = dwarf2_name (imported_die, imported_cu);
7819 if (imported_name == NULL)
7821 complaint (&symfile_complaints,
7822 _("child DW_TAG_imported_declaration has unknown "
7823 "imported name - DIE at 0x%x [in module %s]"),
7824 child_die->offset.sect_off, objfile->name);
7828 VEC_safe_push (const_char_ptr, excludes, imported_name);
7830 process_die (child_die, cu);
7833 cp_add_using_directive (import_prefix,
7836 imported_declaration,
7839 &objfile->objfile_obstack);
7841 do_cleanups (cleanups);
7844 /* Cleanup function for handle_DW_AT_stmt_list. */
7847 free_cu_line_header (void *arg)
7849 struct dwarf2_cu *cu = arg;
7851 free_line_header (cu->line_header);
7852 cu->line_header = NULL;
7855 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7856 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7857 this, it was first present in GCC release 4.3.0. */
7860 producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu)
7862 if (!cu->checked_producer)
7863 check_producer (cu);
7865 return cu->producer_is_gcc_lt_4_3;
7869 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
7870 const char **name, const char **comp_dir)
7872 struct attribute *attr;
7877 /* Find the filename. Do not use dwarf2_name here, since the filename
7878 is not a source language identifier. */
7879 attr = dwarf2_attr (die, DW_AT_name, cu);
7882 *name = DW_STRING (attr);
7885 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
7887 *comp_dir = DW_STRING (attr);
7888 else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL
7889 && IS_ABSOLUTE_PATH (*name))
7891 char *d = ldirname (*name);
7895 make_cleanup (xfree, d);
7897 if (*comp_dir != NULL)
7899 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7900 directory, get rid of it. */
7901 char *cp = strchr (*comp_dir, ':');
7903 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
7908 *name = "<unknown>";
7911 /* Handle DW_AT_stmt_list for a compilation unit.
7912 DIE is the DW_TAG_compile_unit die for CU.
7913 COMP_DIR is the compilation directory.
7914 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7917 handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu,
7918 const char *comp_dir)
7920 struct attribute *attr;
7922 gdb_assert (! cu->per_cu->is_debug_types);
7924 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
7927 unsigned int line_offset = DW_UNSND (attr);
7928 struct line_header *line_header
7929 = dwarf_decode_line_header (line_offset, cu);
7933 cu->line_header = line_header;
7934 make_cleanup (free_cu_line_header, cu);
7935 dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1);
7940 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7943 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
7945 struct objfile *objfile = dwarf2_per_objfile->objfile;
7946 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
7947 CORE_ADDR lowpc = ((CORE_ADDR) -1);
7948 CORE_ADDR highpc = ((CORE_ADDR) 0);
7949 struct attribute *attr;
7950 const char *name = NULL;
7951 const char *comp_dir = NULL;
7952 struct die_info *child_die;
7953 bfd *abfd = objfile->obfd;
7956 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7958 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
7960 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7961 from finish_block. */
7962 if (lowpc == ((CORE_ADDR) -1))
7967 find_file_and_directory (die, cu, &name, &comp_dir);
7969 prepare_one_comp_unit (cu, die, cu->language);
7971 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7972 standardised yet. As a workaround for the language detection we fall
7973 back to the DW_AT_producer string. */
7974 if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
7975 cu->language = language_opencl;
7977 /* Similar hack for Go. */
7978 if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL)
7979 set_cu_language (DW_LANG_Go, cu);
7981 dwarf2_start_symtab (cu, name, comp_dir, lowpc);
7983 /* Decode line number information if present. We do this before
7984 processing child DIEs, so that the line header table is available
7985 for DW_AT_decl_file. */
7986 handle_DW_AT_stmt_list (die, cu, comp_dir);
7988 /* Process all dies in compilation unit. */
7989 if (die->child != NULL)
7991 child_die = die->child;
7992 while (child_die && child_die->tag)
7994 process_die (child_die, cu);
7995 child_die = sibling_die (child_die);
7999 /* Decode macro information, if present. Dwarf 2 macro information
8000 refers to information in the line number info statement program
8001 header, so we can only read it if we've read the header
8003 attr = dwarf2_attr (die, DW_AT_GNU_macros, cu);
8004 if (attr && cu->line_header)
8006 if (dwarf2_attr (die, DW_AT_macro_info, cu))
8007 complaint (&symfile_complaints,
8008 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8010 dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1);
8014 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
8015 if (attr && cu->line_header)
8017 unsigned int macro_offset = DW_UNSND (attr);
8019 dwarf_decode_macros (cu, macro_offset, comp_dir, 0);
8023 do_cleanups (back_to);
8026 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8027 Create the set of symtabs used by this TU, or if this TU is sharing
8028 symtabs with another TU and the symtabs have already been created
8029 then restore those symtabs in the line header.
8030 We don't need the pc/line-number mapping for type units. */
8033 setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
8035 struct objfile *objfile = dwarf2_per_objfile->objfile;
8036 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
8037 struct type_unit_group *tu_group;
8039 struct line_header *lh;
8040 struct attribute *attr;
8041 unsigned int i, line_offset;
8043 gdb_assert (per_cu->is_debug_types);
8045 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
8047 /* If we're using .gdb_index (includes -readnow) then
8048 per_cu->s.type_unit_group may not have been set up yet. */
8049 if (per_cu->type_unit_group == NULL)
8050 per_cu->type_unit_group = get_type_unit_group (cu, attr);
8051 tu_group = per_cu->type_unit_group;
8053 /* If we've already processed this stmt_list there's no real need to
8054 do it again, we could fake it and just recreate the part we need
8055 (file name,index -> symtab mapping). If data shows this optimization
8056 is useful we can do it then. */
8057 first_time = tu_group->primary_symtab == NULL;
8059 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8064 line_offset = DW_UNSND (attr);
8065 lh = dwarf_decode_line_header (line_offset, cu);
8070 dwarf2_start_symtab (cu, "", NULL, 0);
8073 gdb_assert (tu_group->symtabs == NULL);
8076 /* Note: The primary symtab will get allocated at the end. */
8080 cu->line_header = lh;
8081 make_cleanup (free_cu_line_header, cu);
8085 dwarf2_start_symtab (cu, "", NULL, 0);
8087 tu_group->num_symtabs = lh->num_file_names;
8088 tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names);
8090 for (i = 0; i < lh->num_file_names; ++i)
8093 struct file_entry *fe = &lh->file_names[i];
8096 dir = lh->include_dirs[fe->dir_index - 1];
8097 dwarf2_start_subfile (fe->name, dir, NULL);
8099 /* Note: We don't have to watch for the main subfile here, type units
8100 don't have DW_AT_name. */
8102 if (current_subfile->symtab == NULL)
8104 /* NOTE: start_subfile will recognize when it's been passed
8105 a file it has already seen. So we can't assume there's a
8106 simple mapping from lh->file_names to subfiles,
8107 lh->file_names may contain dups. */
8108 current_subfile->symtab = allocate_symtab (current_subfile->name,
8112 fe->symtab = current_subfile->symtab;
8113 tu_group->symtabs[i] = fe->symtab;
8120 for (i = 0; i < lh->num_file_names; ++i)
8122 struct file_entry *fe = &lh->file_names[i];
8124 fe->symtab = tu_group->symtabs[i];
8128 /* The main symtab is allocated last. Type units don't have DW_AT_name
8129 so they don't have a "real" (so to speak) symtab anyway.
8130 There is later code that will assign the main symtab to all symbols
8131 that don't have one. We need to handle the case of a symbol with a
8132 missing symtab (DW_AT_decl_file) anyway. */
8135 /* Process DW_TAG_type_unit.
8136 For TUs we want to skip the first top level sibling if it's not the
8137 actual type being defined by this TU. In this case the first top
8138 level sibling is there to provide context only. */
8141 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
8143 struct die_info *child_die;
8145 prepare_one_comp_unit (cu, die, language_minimal);
8147 /* Initialize (or reinitialize) the machinery for building symtabs.
8148 We do this before processing child DIEs, so that the line header table
8149 is available for DW_AT_decl_file. */
8150 setup_type_unit_groups (die, cu);
8152 if (die->child != NULL)
8154 child_die = die->child;
8155 while (child_die && child_die->tag)
8157 process_die (child_die, cu);
8158 child_die = sibling_die (child_die);
8165 http://gcc.gnu.org/wiki/DebugFission
8166 http://gcc.gnu.org/wiki/DebugFissionDWP
8168 To simplify handling of both DWO files ("object" files with the DWARF info)
8169 and DWP files (a file with the DWOs packaged up into one file), we treat
8170 DWP files as having a collection of virtual DWO files. */
8173 hash_dwo_file (const void *item)
8175 const struct dwo_file *dwo_file = item;
8177 return htab_hash_string (dwo_file->name);
8181 eq_dwo_file (const void *item_lhs, const void *item_rhs)
8183 const struct dwo_file *lhs = item_lhs;
8184 const struct dwo_file *rhs = item_rhs;
8186 return strcmp (lhs->name, rhs->name) == 0;
8189 /* Allocate a hash table for DWO files. */
8192 allocate_dwo_file_hash_table (void)
8194 struct objfile *objfile = dwarf2_per_objfile->objfile;
8196 return htab_create_alloc_ex (41,
8200 &objfile->objfile_obstack,
8201 hashtab_obstack_allocate,
8202 dummy_obstack_deallocate);
8205 /* Lookup DWO file DWO_NAME. */
8208 lookup_dwo_file_slot (const char *dwo_name)
8210 struct dwo_file find_entry;
8213 if (dwarf2_per_objfile->dwo_files == NULL)
8214 dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table ();
8216 memset (&find_entry, 0, sizeof (find_entry));
8217 find_entry.name = dwo_name;
8218 slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT);
8224 hash_dwo_unit (const void *item)
8226 const struct dwo_unit *dwo_unit = item;
8228 /* This drops the top 32 bits of the id, but is ok for a hash. */
8229 return dwo_unit->signature;
8233 eq_dwo_unit (const void *item_lhs, const void *item_rhs)
8235 const struct dwo_unit *lhs = item_lhs;
8236 const struct dwo_unit *rhs = item_rhs;
8238 /* The signature is assumed to be unique within the DWO file.
8239 So while object file CU dwo_id's always have the value zero,
8240 that's OK, assuming each object file DWO file has only one CU,
8241 and that's the rule for now. */
8242 return lhs->signature == rhs->signature;
8245 /* Allocate a hash table for DWO CUs,TUs.
8246 There is one of these tables for each of CUs,TUs for each DWO file. */
8249 allocate_dwo_unit_table (struct objfile *objfile)
8251 /* Start out with a pretty small number.
8252 Generally DWO files contain only one CU and maybe some TUs. */
8253 return htab_create_alloc_ex (3,
8257 &objfile->objfile_obstack,
8258 hashtab_obstack_allocate,
8259 dummy_obstack_deallocate);
8262 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8264 struct create_dwo_info_table_data
8266 struct dwo_file *dwo_file;
8270 /* die_reader_func for create_dwo_debug_info_hash_table. */
8273 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs *reader,
8275 struct die_info *comp_unit_die,
8279 struct dwarf2_cu *cu = reader->cu;
8280 struct objfile *objfile = dwarf2_per_objfile->objfile;
8281 sect_offset offset = cu->per_cu->offset;
8282 struct dwarf2_section_info *section = cu->per_cu->info_or_types_section;
8283 struct create_dwo_info_table_data *data = datap;
8284 struct dwo_file *dwo_file = data->dwo_file;
8285 htab_t cu_htab = data->cu_htab;
8287 struct attribute *attr;
8288 struct dwo_unit *dwo_unit;
8290 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
8293 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8294 " its dwo_id [in module %s]"),
8295 offset.sect_off, dwo_file->name);
8299 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
8300 dwo_unit->dwo_file = dwo_file;
8301 dwo_unit->signature = DW_UNSND (attr);
8302 dwo_unit->info_or_types_section = section;
8303 dwo_unit->offset = offset;
8304 dwo_unit->length = cu->per_cu->length;
8306 slot = htab_find_slot (cu_htab, dwo_unit, INSERT);
8307 gdb_assert (slot != NULL);
8310 const struct dwo_unit *dup_dwo_unit = *slot;
8312 complaint (&symfile_complaints,
8313 _("debug entry at offset 0x%x is duplicate to the entry at"
8314 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8315 offset.sect_off, dup_dwo_unit->offset.sect_off,
8316 phex (dwo_unit->signature, sizeof (dwo_unit->signature)),
8322 if (dwarf2_read_debug)
8323 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id 0x%s\n",
8325 phex (dwo_unit->signature,
8326 sizeof (dwo_unit->signature)));
8329 /* Create a hash table to map DWO IDs to their CU entry in
8330 .debug_info.dwo in DWO_FILE.
8331 Note: This function processes DWO files only, not DWP files. */
8334 create_dwo_debug_info_hash_table (struct dwo_file *dwo_file)
8336 struct objfile *objfile = dwarf2_per_objfile->objfile;
8337 struct dwarf2_section_info *section = &dwo_file->sections.info;
8340 gdb_byte *info_ptr, *end_ptr;
8341 struct create_dwo_info_table_data create_dwo_info_table_data;
8343 dwarf2_read_section (objfile, section);
8344 info_ptr = section->buffer;
8346 if (info_ptr == NULL)
8349 /* We can't set abfd until now because the section may be empty or
8350 not present, in which case section->asection will be NULL. */
8351 abfd = section->asection->owner;
8353 if (dwarf2_read_debug)
8354 fprintf_unfiltered (gdb_stdlog, "Reading .debug_info.dwo for %s:\n",
8355 bfd_get_filename (abfd));
8357 cu_htab = allocate_dwo_unit_table (objfile);
8359 create_dwo_info_table_data.dwo_file = dwo_file;
8360 create_dwo_info_table_data.cu_htab = cu_htab;
8362 end_ptr = info_ptr + section->size;
8363 while (info_ptr < end_ptr)
8365 struct dwarf2_per_cu_data per_cu;
8367 memset (&per_cu, 0, sizeof (per_cu));
8368 per_cu.objfile = objfile;
8369 per_cu.is_debug_types = 0;
8370 per_cu.offset.sect_off = info_ptr - section->buffer;
8371 per_cu.info_or_types_section = section;
8373 init_cutu_and_read_dies_no_follow (&per_cu,
8374 &dwo_file->sections.abbrev,
8376 create_dwo_debug_info_hash_table_reader,
8377 &create_dwo_info_table_data);
8379 info_ptr += per_cu.length;
8385 /* DWP file .debug_{cu,tu}_index section format:
8386 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8388 Both index sections have the same format, and serve to map a 64-bit
8389 signature to a set of section numbers. Each section begins with a header,
8390 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8391 indexes, and a pool of 32-bit section numbers. The index sections will be
8392 aligned at 8-byte boundaries in the file.
8394 The index section header contains two unsigned 32-bit values (using the
8395 byte order of the application binary):
8397 N, the number of compilation units or type units in the index
8398 M, the number of slots in the hash table
8400 (We assume that N and M will not exceed 2^32 - 1.)
8402 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8404 The hash table begins at offset 8 in the section, and consists of an array
8405 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8406 order of the application binary). Unused slots in the hash table are 0.
8407 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8409 The parallel table begins immediately after the hash table
8410 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8411 array of 32-bit indexes (using the byte order of the application binary),
8412 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8413 table contains a 32-bit index into the pool of section numbers. For unused
8414 hash table slots, the corresponding entry in the parallel table will be 0.
8416 Given a 64-bit compilation unit signature or a type signature S, an entry
8417 in the hash table is located as follows:
8419 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8420 the low-order k bits all set to 1.
8422 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8424 3) If the hash table entry at index H matches the signature, use that
8425 entry. If the hash table entry at index H is unused (all zeroes),
8426 terminate the search: the signature is not present in the table.
8428 4) Let H = (H + H') modulo M. Repeat at Step 3.
8430 Because M > N and H' and M are relatively prime, the search is guaranteed
8431 to stop at an unused slot or find the match.
8433 The pool of section numbers begins immediately following the hash table
8434 (at offset 8 + 12 * M from the beginning of the section). The pool of
8435 section numbers consists of an array of 32-bit words (using the byte order
8436 of the application binary). Each item in the array is indexed starting
8437 from 0. The hash table entry provides the index of the first section
8438 number in the set. Additional section numbers in the set follow, and the
8439 set is terminated by a 0 entry (section number 0 is not used in ELF).
8441 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8442 section must be the first entry in the set, and the .debug_abbrev.dwo must
8443 be the second entry. Other members of the set may follow in any order. */
8445 /* Create a hash table to map DWO IDs to their CU/TU entry in
8446 .debug_{info,types}.dwo in DWP_FILE.
8447 Returns NULL if there isn't one.
8448 Note: This function processes DWP files only, not DWO files. */
8450 static struct dwp_hash_table *
8451 create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types)
8453 struct objfile *objfile = dwarf2_per_objfile->objfile;
8454 bfd *dbfd = dwp_file->dbfd;
8455 char *index_ptr, *index_end;
8456 struct dwarf2_section_info *index;
8457 uint32_t version, nr_units, nr_slots;
8458 struct dwp_hash_table *htab;
8461 index = &dwp_file->sections.tu_index;
8463 index = &dwp_file->sections.cu_index;
8465 if (dwarf2_section_empty_p (index))
8467 dwarf2_read_section (objfile, index);
8469 index_ptr = index->buffer;
8470 index_end = index_ptr + index->size;
8472 version = read_4_bytes (dbfd, index_ptr);
8473 index_ptr += 8; /* Skip the unused word. */
8474 nr_units = read_4_bytes (dbfd, index_ptr);
8476 nr_slots = read_4_bytes (dbfd, index_ptr);
8481 error (_("Dwarf Error: unsupported DWP file version (%u)"
8483 version, dwp_file->name);
8485 if (nr_slots != (nr_slots & -nr_slots))
8487 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8488 " is not power of 2 [in module %s]"),
8489 nr_slots, dwp_file->name);
8492 htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table);
8493 htab->nr_units = nr_units;
8494 htab->nr_slots = nr_slots;
8495 htab->hash_table = index_ptr;
8496 htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots;
8497 htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots;
8502 /* Update SECTIONS with the data from SECTP.
8504 This function is like the other "locate" section routines that are
8505 passed to bfd_map_over_sections, but in this context the sections to
8506 read comes from the DWP hash table, not the full ELF section table.
8508 The result is non-zero for success, or zero if an error was found. */
8511 locate_virtual_dwo_sections (asection *sectp,
8512 struct virtual_dwo_sections *sections)
8514 const struct dwop_section_names *names = &dwop_section_names;
8516 if (section_is_p (sectp->name, &names->abbrev_dwo))
8518 /* There can be only one. */
8519 if (sections->abbrev.asection != NULL)
8521 sections->abbrev.asection = sectp;
8522 sections->abbrev.size = bfd_get_section_size (sectp);
8524 else if (section_is_p (sectp->name, &names->info_dwo)
8525 || section_is_p (sectp->name, &names->types_dwo))
8527 /* There can be only one. */
8528 if (sections->info_or_types.asection != NULL)
8530 sections->info_or_types.asection = sectp;
8531 sections->info_or_types.size = bfd_get_section_size (sectp);
8533 else if (section_is_p (sectp->name, &names->line_dwo))
8535 /* There can be only one. */
8536 if (sections->line.asection != NULL)
8538 sections->line.asection = sectp;
8539 sections->line.size = bfd_get_section_size (sectp);
8541 else if (section_is_p (sectp->name, &names->loc_dwo))
8543 /* There can be only one. */
8544 if (sections->loc.asection != NULL)
8546 sections->loc.asection = sectp;
8547 sections->loc.size = bfd_get_section_size (sectp);
8549 else if (section_is_p (sectp->name, &names->macinfo_dwo))
8551 /* There can be only one. */
8552 if (sections->macinfo.asection != NULL)
8554 sections->macinfo.asection = sectp;
8555 sections->macinfo.size = bfd_get_section_size (sectp);
8557 else if (section_is_p (sectp->name, &names->macro_dwo))
8559 /* There can be only one. */
8560 if (sections->macro.asection != NULL)
8562 sections->macro.asection = sectp;
8563 sections->macro.size = bfd_get_section_size (sectp);
8565 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
8567 /* There can be only one. */
8568 if (sections->str_offsets.asection != NULL)
8570 sections->str_offsets.asection = sectp;
8571 sections->str_offsets.size = bfd_get_section_size (sectp);
8575 /* No other kind of section is valid. */
8582 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8583 HTAB is the hash table from the DWP file.
8584 SECTION_INDEX is the index of the DWO in HTAB. */
8586 static struct dwo_unit *
8587 create_dwo_in_dwp (struct dwp_file *dwp_file,
8588 const struct dwp_hash_table *htab,
8589 uint32_t section_index,
8590 ULONGEST signature, int is_debug_types)
8592 struct objfile *objfile = dwarf2_per_objfile->objfile;
8593 bfd *dbfd = dwp_file->dbfd;
8594 const char *kind = is_debug_types ? "TU" : "CU";
8595 struct dwo_file *dwo_file;
8596 struct dwo_unit *dwo_unit;
8597 struct virtual_dwo_sections sections;
8598 void **dwo_file_slot;
8599 char *virtual_dwo_name;
8600 struct dwarf2_section_info *cutu;
8601 struct cleanup *cleanups;
8604 if (dwarf2_read_debug)
8606 fprintf_unfiltered (gdb_stdlog, "Reading %s %u/0x%s in DWP file: %s\n",
8608 section_index, phex (signature, sizeof (signature)),
8612 /* Fetch the sections of this DWO.
8613 Put a limit on the number of sections we look for so that bad data
8614 doesn't cause us to loop forever. */
8616 #define MAX_NR_DWO_SECTIONS \
8617 (1 /* .debug_info or .debug_types */ \
8618 + 1 /* .debug_abbrev */ \
8619 + 1 /* .debug_line */ \
8620 + 1 /* .debug_loc */ \
8621 + 1 /* .debug_str_offsets */ \
8622 + 1 /* .debug_macro */ \
8623 + 1 /* .debug_macinfo */ \
8624 + 1 /* trailing zero */)
8626 memset (§ions, 0, sizeof (sections));
8627 cleanups = make_cleanup (null_cleanup, 0);
8629 for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i)
8632 uint32_t section_nr =
8635 + (section_index + i) * sizeof (uint32_t));
8637 if (section_nr == 0)
8639 if (section_nr >= dwp_file->num_sections)
8641 error (_("Dwarf Error: bad DWP hash table, section number too large"
8646 sectp = dwp_file->elf_sections[section_nr];
8647 if (! locate_virtual_dwo_sections (sectp, §ions))
8649 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8656 || sections.info_or_types.asection == NULL
8657 || sections.abbrev.asection == NULL)
8659 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8663 if (i == MAX_NR_DWO_SECTIONS)
8665 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8670 /* It's easier for the rest of the code if we fake a struct dwo_file and
8671 have dwo_unit "live" in that. At least for now.
8673 The DWP file can be made up of a random collection of CUs and TUs.
8674 However, for each CU + set of TUs that came from the same original DWO
8675 file, we want to combine them back into a virtual DWO file to save space
8676 (fewer struct dwo_file objects to allocated). Remember that for really
8677 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8680 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8681 sections.abbrev.asection ? sections.abbrev.asection->id : 0,
8682 sections.line.asection ? sections.line.asection->id : 0,
8683 sections.loc.asection ? sections.loc.asection->id : 0,
8684 (sections.str_offsets.asection
8685 ? sections.str_offsets.asection->id
8687 make_cleanup (xfree, virtual_dwo_name);
8688 /* Can we use an existing virtual DWO file? */
8689 dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name);
8690 /* Create one if necessary. */
8691 if (*dwo_file_slot == NULL)
8693 if (dwarf2_read_debug)
8695 fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n",
8698 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
8699 dwo_file->name = obstack_copy0 (&objfile->objfile_obstack,
8701 strlen (virtual_dwo_name));
8702 dwo_file->sections.abbrev = sections.abbrev;
8703 dwo_file->sections.line = sections.line;
8704 dwo_file->sections.loc = sections.loc;
8705 dwo_file->sections.macinfo = sections.macinfo;
8706 dwo_file->sections.macro = sections.macro;
8707 dwo_file->sections.str_offsets = sections.str_offsets;
8708 /* The "str" section is global to the entire DWP file. */
8709 dwo_file->sections.str = dwp_file->sections.str;
8710 /* The info or types section is assigned later to dwo_unit,
8711 there's no need to record it in dwo_file.
8712 Also, we can't simply record type sections in dwo_file because
8713 we record a pointer into the vector in dwo_unit. As we collect more
8714 types we'll grow the vector and eventually have to reallocate space
8715 for it, invalidating all the pointers into the current copy. */
8716 *dwo_file_slot = dwo_file;
8720 if (dwarf2_read_debug)
8722 fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n",
8725 dwo_file = *dwo_file_slot;
8727 do_cleanups (cleanups);
8729 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
8730 dwo_unit->dwo_file = dwo_file;
8731 dwo_unit->signature = signature;
8732 dwo_unit->info_or_types_section =
8733 obstack_alloc (&objfile->objfile_obstack,
8734 sizeof (struct dwarf2_section_info));
8735 *dwo_unit->info_or_types_section = sections.info_or_types;
8736 /* offset, length, type_offset_in_tu are set later. */
8741 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8743 static struct dwo_unit *
8744 lookup_dwo_in_dwp (struct dwp_file *dwp_file,
8745 const struct dwp_hash_table *htab,
8746 ULONGEST signature, int is_debug_types)
8748 bfd *dbfd = dwp_file->dbfd;
8749 uint32_t mask = htab->nr_slots - 1;
8750 uint32_t hash = signature & mask;
8751 uint32_t hash2 = ((signature >> 32) & mask) | 1;
8754 struct dwo_unit find_dwo_cu, *dwo_cu;
8756 memset (&find_dwo_cu, 0, sizeof (find_dwo_cu));
8757 find_dwo_cu.signature = signature;
8758 slot = htab_find_slot (dwp_file->loaded_cutus, &find_dwo_cu, INSERT);
8763 /* Use a for loop so that we don't loop forever on bad debug info. */
8764 for (i = 0; i < htab->nr_slots; ++i)
8766 ULONGEST signature_in_table;
8768 signature_in_table =
8769 read_8_bytes (dbfd, htab->hash_table + hash * sizeof (uint64_t));
8770 if (signature_in_table == signature)
8772 uint32_t section_index =
8773 read_4_bytes (dbfd, htab->unit_table + hash * sizeof (uint32_t));
8775 *slot = create_dwo_in_dwp (dwp_file, htab, section_index,
8776 signature, is_debug_types);
8779 if (signature_in_table == 0)
8781 hash = (hash + hash2) & mask;
8784 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8789 /* Subroutine of open_dwop_file to simplify it.
8790 Open the file specified by FILE_NAME and hand it off to BFD for
8791 preliminary analysis. Return a newly initialized bfd *, which
8792 includes a canonicalized copy of FILE_NAME.
8793 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8794 In case of trouble, return NULL.
8795 NOTE: This function is derived from symfile_bfd_open. */
8798 try_open_dwop_file (const char *file_name, int is_dwp)
8802 char *absolute_name;
8804 flags = OPF_TRY_CWD_FIRST;
8806 flags |= OPF_SEARCH_IN_PATH;
8807 desc = openp (debug_file_directory, flags, file_name,
8808 O_RDONLY | O_BINARY, &absolute_name);
8812 sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc);
8815 xfree (absolute_name);
8818 xfree (absolute_name);
8819 bfd_set_cacheable (sym_bfd, 1);
8821 if (!bfd_check_format (sym_bfd, bfd_object))
8823 gdb_bfd_unref (sym_bfd); /* This also closes desc. */
8830 /* Try to open DWO/DWP file FILE_NAME.
8831 COMP_DIR is the DW_AT_comp_dir attribute.
8832 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8833 The result is the bfd handle of the file.
8834 If there is a problem finding or opening the file, return NULL.
8835 Upon success, the canonicalized path of the file is stored in the bfd,
8836 same as symfile_bfd_open. */
8839 open_dwop_file (const char *file_name, const char *comp_dir, int is_dwp)
8843 if (IS_ABSOLUTE_PATH (file_name))
8844 return try_open_dwop_file (file_name, is_dwp);
8846 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8848 if (comp_dir != NULL)
8850 char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL);
8852 /* NOTE: If comp_dir is a relative path, this will also try the
8853 search path, which seems useful. */
8854 abfd = try_open_dwop_file (path_to_try, is_dwp);
8855 xfree (path_to_try);
8860 /* That didn't work, try debug-file-directory, which, despite its name,
8861 is a list of paths. */
8863 if (*debug_file_directory == '\0')
8866 return try_open_dwop_file (file_name, is_dwp);
8869 /* This function is mapped across the sections and remembers the offset and
8870 size of each of the DWO debugging sections we are interested in. */
8873 dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr)
8875 struct dwo_sections *dwo_sections = dwo_sections_ptr;
8876 const struct dwop_section_names *names = &dwop_section_names;
8878 if (section_is_p (sectp->name, &names->abbrev_dwo))
8880 dwo_sections->abbrev.asection = sectp;
8881 dwo_sections->abbrev.size = bfd_get_section_size (sectp);
8883 else if (section_is_p (sectp->name, &names->info_dwo))
8885 dwo_sections->info.asection = sectp;
8886 dwo_sections->info.size = bfd_get_section_size (sectp);
8888 else if (section_is_p (sectp->name, &names->line_dwo))
8890 dwo_sections->line.asection = sectp;
8891 dwo_sections->line.size = bfd_get_section_size (sectp);
8893 else if (section_is_p (sectp->name, &names->loc_dwo))
8895 dwo_sections->loc.asection = sectp;
8896 dwo_sections->loc.size = bfd_get_section_size (sectp);
8898 else if (section_is_p (sectp->name, &names->macinfo_dwo))
8900 dwo_sections->macinfo.asection = sectp;
8901 dwo_sections->macinfo.size = bfd_get_section_size (sectp);
8903 else if (section_is_p (sectp->name, &names->macro_dwo))
8905 dwo_sections->macro.asection = sectp;
8906 dwo_sections->macro.size = bfd_get_section_size (sectp);
8908 else if (section_is_p (sectp->name, &names->str_dwo))
8910 dwo_sections->str.asection = sectp;
8911 dwo_sections->str.size = bfd_get_section_size (sectp);
8913 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
8915 dwo_sections->str_offsets.asection = sectp;
8916 dwo_sections->str_offsets.size = bfd_get_section_size (sectp);
8918 else if (section_is_p (sectp->name, &names->types_dwo))
8920 struct dwarf2_section_info type_section;
8922 memset (&type_section, 0, sizeof (type_section));
8923 type_section.asection = sectp;
8924 type_section.size = bfd_get_section_size (sectp);
8925 VEC_safe_push (dwarf2_section_info_def, dwo_sections->types,
8930 /* Initialize the use of the DWO file specified by DWO_NAME.
8931 The result is NULL if DWO_NAME can't be found. */
8933 static struct dwo_file *
8934 open_and_init_dwo_file (const char *dwo_name, const char *comp_dir)
8936 struct objfile *objfile = dwarf2_per_objfile->objfile;
8937 struct dwo_file *dwo_file;
8939 struct cleanup *cleanups;
8941 dbfd = open_dwop_file (dwo_name, comp_dir, 0);
8944 if (dwarf2_read_debug)
8945 fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name);
8948 dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file);
8949 dwo_file->name = obstack_copy0 (&objfile->objfile_obstack,
8950 dwo_name, strlen (dwo_name));
8951 dwo_file->dbfd = dbfd;
8953 cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file);
8955 bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections);
8957 dwo_file->cus = create_dwo_debug_info_hash_table (dwo_file);
8959 dwo_file->tus = create_debug_types_hash_table (dwo_file,
8960 dwo_file->sections.types);
8962 discard_cleanups (cleanups);
8964 if (dwarf2_read_debug)
8965 fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name);
8970 /* This function is mapped across the sections and remembers the offset and
8971 size of each of the DWP debugging sections we are interested in. */
8974 dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr)
8976 struct dwp_file *dwp_file = dwp_file_ptr;
8977 const struct dwop_section_names *names = &dwop_section_names;
8978 unsigned int elf_section_nr = elf_section_data (sectp)->this_idx;
8980 /* Record the ELF section number for later lookup: this is what the
8981 .debug_cu_index,.debug_tu_index tables use. */
8982 gdb_assert (elf_section_nr < dwp_file->num_sections);
8983 dwp_file->elf_sections[elf_section_nr] = sectp;
8985 /* Look for specific sections that we need. */
8986 if (section_is_p (sectp->name, &names->str_dwo))
8988 dwp_file->sections.str.asection = sectp;
8989 dwp_file->sections.str.size = bfd_get_section_size (sectp);
8991 else if (section_is_p (sectp->name, &names->cu_index))
8993 dwp_file->sections.cu_index.asection = sectp;
8994 dwp_file->sections.cu_index.size = bfd_get_section_size (sectp);
8996 else if (section_is_p (sectp->name, &names->tu_index))
8998 dwp_file->sections.tu_index.asection = sectp;
8999 dwp_file->sections.tu_index.size = bfd_get_section_size (sectp);
9003 /* Hash function for dwp_file loaded CUs/TUs. */
9006 hash_dwp_loaded_cutus (const void *item)
9008 const struct dwo_unit *dwo_unit = item;
9010 /* This drops the top 32 bits of the signature, but is ok for a hash. */
9011 return dwo_unit->signature;
9014 /* Equality function for dwp_file loaded CUs/TUs. */
9017 eq_dwp_loaded_cutus (const void *a, const void *b)
9019 const struct dwo_unit *dua = a;
9020 const struct dwo_unit *dub = b;
9022 return dua->signature == dub->signature;
9025 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
9028 allocate_dwp_loaded_cutus_table (struct objfile *objfile)
9030 return htab_create_alloc_ex (3,
9031 hash_dwp_loaded_cutus,
9032 eq_dwp_loaded_cutus,
9034 &objfile->objfile_obstack,
9035 hashtab_obstack_allocate,
9036 dummy_obstack_deallocate);
9039 /* Initialize the use of the DWP file for the current objfile.
9040 By convention the name of the DWP file is ${objfile}.dwp.
9041 The result is NULL if it can't be found. */
9043 static struct dwp_file *
9044 open_and_init_dwp_file (const char *comp_dir)
9046 struct objfile *objfile = dwarf2_per_objfile->objfile;
9047 struct dwp_file *dwp_file;
9050 struct cleanup *cleanups;
9052 dwp_name = xstrprintf ("%s.dwp", dwarf2_per_objfile->objfile->name);
9053 cleanups = make_cleanup (xfree, dwp_name);
9055 dbfd = open_dwop_file (dwp_name, comp_dir, 1);
9058 if (dwarf2_read_debug)
9059 fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name);
9060 do_cleanups (cleanups);
9063 dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file);
9064 dwp_file->name = obstack_copy0 (&objfile->objfile_obstack,
9065 dwp_name, strlen (dwp_name));
9066 dwp_file->dbfd = dbfd;
9067 do_cleanups (cleanups);
9069 cleanups = make_cleanup (free_dwo_file_cleanup, dwp_file);
9071 /* +1: section 0 is unused */
9072 dwp_file->num_sections = bfd_count_sections (dbfd) + 1;
9073 dwp_file->elf_sections =
9074 OBSTACK_CALLOC (&objfile->objfile_obstack,
9075 dwp_file->num_sections, asection *);
9077 bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file);
9079 dwp_file->cus = create_dwp_hash_table (dwp_file, 0);
9081 dwp_file->tus = create_dwp_hash_table (dwp_file, 1);
9083 dwp_file->loaded_cutus = allocate_dwp_loaded_cutus_table (objfile);
9085 discard_cleanups (cleanups);
9087 if (dwarf2_read_debug)
9089 fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name);
9090 fprintf_unfiltered (gdb_stdlog,
9091 " %u CUs, %u TUs\n",
9092 dwp_file->cus ? dwp_file->cus->nr_units : 0,
9093 dwp_file->tus ? dwp_file->tus->nr_units : 0);
9099 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9100 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9101 or in the DWP file for the objfile, referenced by THIS_UNIT.
9102 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9103 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9105 This is called, for example, when wanting to read a variable with a
9106 complex location. Therefore we don't want to do file i/o for every call.
9107 Therefore we don't want to look for a DWO file on every call.
9108 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9109 then we check if we've already seen DWO_NAME, and only THEN do we check
9112 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9113 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9115 static struct dwo_unit *
9116 lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit,
9117 const char *dwo_name, const char *comp_dir,
9118 ULONGEST signature, int is_debug_types)
9120 struct objfile *objfile = dwarf2_per_objfile->objfile;
9121 const char *kind = is_debug_types ? "TU" : "CU";
9122 void **dwo_file_slot;
9123 struct dwo_file *dwo_file;
9124 struct dwp_file *dwp_file;
9126 /* Have we already read SIGNATURE from a DWP file? */
9128 if (! dwarf2_per_objfile->dwp_checked)
9130 dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (comp_dir);
9131 dwarf2_per_objfile->dwp_checked = 1;
9133 dwp_file = dwarf2_per_objfile->dwp_file;
9135 if (dwp_file != NULL)
9137 const struct dwp_hash_table *dwp_htab =
9138 is_debug_types ? dwp_file->tus : dwp_file->cus;
9140 if (dwp_htab != NULL)
9142 struct dwo_unit *dwo_cutu =
9143 lookup_dwo_in_dwp (dwp_file, dwp_htab, signature, is_debug_types);
9145 if (dwo_cutu != NULL)
9147 if (dwarf2_read_debug)
9149 fprintf_unfiltered (gdb_stdlog,
9150 "Virtual DWO %s %s found: @%s\n",
9151 kind, hex_string (signature),
9152 host_address_to_string (dwo_cutu));
9159 /* Have we already seen DWO_NAME? */
9161 dwo_file_slot = lookup_dwo_file_slot (dwo_name);
9162 if (*dwo_file_slot == NULL)
9164 /* Read in the file and build a table of the DWOs it contains. */
9165 *dwo_file_slot = open_and_init_dwo_file (dwo_name, comp_dir);
9167 /* NOTE: This will be NULL if unable to open the file. */
9168 dwo_file = *dwo_file_slot;
9170 if (dwo_file != NULL)
9172 htab_t htab = is_debug_types ? dwo_file->tus : dwo_file->cus;
9176 struct dwo_unit find_dwo_cutu, *dwo_cutu;
9178 memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu));
9179 find_dwo_cutu.signature = signature;
9180 dwo_cutu = htab_find (htab, &find_dwo_cutu);
9182 if (dwo_cutu != NULL)
9184 if (dwarf2_read_debug)
9186 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n",
9187 kind, dwo_name, hex_string (signature),
9188 host_address_to_string (dwo_cutu));
9195 /* We didn't find it. This could mean a dwo_id mismatch, or
9196 someone deleted the DWO/DWP file, or the search path isn't set up
9197 correctly to find the file. */
9199 if (dwarf2_read_debug)
9201 fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n",
9202 kind, dwo_name, hex_string (signature));
9205 complaint (&symfile_complaints,
9206 _("Could not find DWO CU referenced by CU at offset 0x%x"
9208 this_unit->offset.sect_off, objfile->name);
9212 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9213 See lookup_dwo_cutu_unit for details. */
9215 static struct dwo_unit *
9216 lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu,
9217 const char *dwo_name, const char *comp_dir,
9220 return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0);
9223 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9224 See lookup_dwo_cutu_unit for details. */
9226 static struct dwo_unit *
9227 lookup_dwo_type_unit (struct signatured_type *this_tu,
9228 const char *dwo_name, const char *comp_dir)
9230 return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1);
9233 /* Free all resources associated with DWO_FILE.
9234 Close the DWO file and munmap the sections.
9235 All memory should be on the objfile obstack. */
9238 free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile)
9241 struct dwarf2_section_info *section;
9243 gdb_bfd_unref (dwo_file->dbfd);
9245 VEC_free (dwarf2_section_info_def, dwo_file->sections.types);
9248 /* Wrapper for free_dwo_file for use in cleanups. */
9251 free_dwo_file_cleanup (void *arg)
9253 struct dwo_file *dwo_file = (struct dwo_file *) arg;
9254 struct objfile *objfile = dwarf2_per_objfile->objfile;
9256 free_dwo_file (dwo_file, objfile);
9259 /* Traversal function for free_dwo_files. */
9262 free_dwo_file_from_slot (void **slot, void *info)
9264 struct dwo_file *dwo_file = (struct dwo_file *) *slot;
9265 struct objfile *objfile = (struct objfile *) info;
9267 free_dwo_file (dwo_file, objfile);
9272 /* Free all resources associated with DWO_FILES. */
9275 free_dwo_files (htab_t dwo_files, struct objfile *objfile)
9277 htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile);
9280 /* Read in various DIEs. */
9282 /* qsort helper for inherit_abstract_dies. */
9285 unsigned_int_compar (const void *ap, const void *bp)
9287 unsigned int a = *(unsigned int *) ap;
9288 unsigned int b = *(unsigned int *) bp;
9290 return (a > b) - (b > a);
9293 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9294 Inherit only the children of the DW_AT_abstract_origin DIE not being
9295 already referenced by DW_AT_abstract_origin from the children of the
9299 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
9301 struct die_info *child_die;
9302 unsigned die_children_count;
9303 /* CU offsets which were referenced by children of the current DIE. */
9304 sect_offset *offsets;
9305 sect_offset *offsets_end, *offsetp;
9306 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9307 struct die_info *origin_die;
9308 /* Iterator of the ORIGIN_DIE children. */
9309 struct die_info *origin_child_die;
9310 struct cleanup *cleanups;
9311 struct attribute *attr;
9312 struct dwarf2_cu *origin_cu;
9313 struct pending **origin_previous_list_in_scope;
9315 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
9319 /* Note that following die references may follow to a die in a
9323 origin_die = follow_die_ref (die, attr, &origin_cu);
9325 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9327 origin_previous_list_in_scope = origin_cu->list_in_scope;
9328 origin_cu->list_in_scope = cu->list_in_scope;
9330 if (die->tag != origin_die->tag
9331 && !(die->tag == DW_TAG_inlined_subroutine
9332 && origin_die->tag == DW_TAG_subprogram))
9333 complaint (&symfile_complaints,
9334 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9335 die->offset.sect_off, origin_die->offset.sect_off);
9337 child_die = die->child;
9338 die_children_count = 0;
9339 while (child_die && child_die->tag)
9341 child_die = sibling_die (child_die);
9342 die_children_count++;
9344 offsets = xmalloc (sizeof (*offsets) * die_children_count);
9345 cleanups = make_cleanup (xfree, offsets);
9347 offsets_end = offsets;
9348 child_die = die->child;
9349 while (child_die && child_die->tag)
9351 /* For each CHILD_DIE, find the corresponding child of
9352 ORIGIN_DIE. If there is more than one layer of
9353 DW_AT_abstract_origin, follow them all; there shouldn't be,
9354 but GCC versions at least through 4.4 generate this (GCC PR
9356 struct die_info *child_origin_die = child_die;
9357 struct dwarf2_cu *child_origin_cu = cu;
9361 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
9365 child_origin_die = follow_die_ref (child_origin_die, attr,
9369 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9370 counterpart may exist. */
9371 if (child_origin_die != child_die)
9373 if (child_die->tag != child_origin_die->tag
9374 && !(child_die->tag == DW_TAG_inlined_subroutine
9375 && child_origin_die->tag == DW_TAG_subprogram))
9376 complaint (&symfile_complaints,
9377 _("Child DIE 0x%x and its abstract origin 0x%x have "
9378 "different tags"), child_die->offset.sect_off,
9379 child_origin_die->offset.sect_off);
9380 if (child_origin_die->parent != origin_die)
9381 complaint (&symfile_complaints,
9382 _("Child DIE 0x%x and its abstract origin 0x%x have "
9383 "different parents"), child_die->offset.sect_off,
9384 child_origin_die->offset.sect_off);
9386 *offsets_end++ = child_origin_die->offset;
9388 child_die = sibling_die (child_die);
9390 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
9391 unsigned_int_compar);
9392 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
9393 if (offsetp[-1].sect_off == offsetp->sect_off)
9394 complaint (&symfile_complaints,
9395 _("Multiple children of DIE 0x%x refer "
9396 "to DIE 0x%x as their abstract origin"),
9397 die->offset.sect_off, offsetp->sect_off);
9400 origin_child_die = origin_die->child;
9401 while (origin_child_die && origin_child_die->tag)
9403 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9404 while (offsetp < offsets_end
9405 && offsetp->sect_off < origin_child_die->offset.sect_off)
9407 if (offsetp >= offsets_end
9408 || offsetp->sect_off > origin_child_die->offset.sect_off)
9410 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9411 process_die (origin_child_die, origin_cu);
9413 origin_child_die = sibling_die (origin_child_die);
9415 origin_cu->list_in_scope = origin_previous_list_in_scope;
9417 do_cleanups (cleanups);
9421 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
9423 struct objfile *objfile = cu->objfile;
9424 struct context_stack *new;
9427 struct die_info *child_die;
9428 struct attribute *attr, *call_line, *call_file;
9431 struct block *block;
9432 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
9433 VEC (symbolp) *template_args = NULL;
9434 struct template_symbol *templ_func = NULL;
9438 /* If we do not have call site information, we can't show the
9439 caller of this inlined function. That's too confusing, so
9440 only use the scope for local variables. */
9441 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
9442 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
9443 if (call_line == NULL || call_file == NULL)
9445 read_lexical_block_scope (die, cu);
9450 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9452 name = dwarf2_name (die, cu);
9454 /* Ignore functions with missing or empty names. These are actually
9455 illegal according to the DWARF standard. */
9458 complaint (&symfile_complaints,
9459 _("missing name for subprogram DIE at %d"),
9460 die->offset.sect_off);
9464 /* Ignore functions with missing or invalid low and high pc attributes. */
9465 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
9467 attr = dwarf2_attr (die, DW_AT_external, cu);
9468 if (!attr || !DW_UNSND (attr))
9469 complaint (&symfile_complaints,
9470 _("cannot get low and high bounds "
9471 "for subprogram DIE at %d"),
9472 die->offset.sect_off);
9479 /* If we have any template arguments, then we must allocate a
9480 different sort of symbol. */
9481 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
9483 if (child_die->tag == DW_TAG_template_type_param
9484 || child_die->tag == DW_TAG_template_value_param)
9486 templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
9487 struct template_symbol);
9488 templ_func->base.is_cplus_template_function = 1;
9493 new = push_context (0, lowpc);
9494 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
9495 (struct symbol *) templ_func);
9497 /* If there is a location expression for DW_AT_frame_base, record
9499 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
9501 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9502 expression is being recorded directly in the function's symbol
9503 and not in a separate frame-base object. I guess this hack is
9504 to avoid adding some sort of frame-base adjunct/annex to the
9505 function's symbol :-(. The problem with doing this is that it
9506 results in a function symbol with a location expression that
9507 has nothing to do with the location of the function, ouch! The
9508 relationship should be: a function's symbol has-a frame base; a
9509 frame-base has-a location expression. */
9510 dwarf2_symbol_mark_computed (attr, new->name, cu);
9512 cu->list_in_scope = &local_symbols;
9514 if (die->child != NULL)
9516 child_die = die->child;
9517 while (child_die && child_die->tag)
9519 if (child_die->tag == DW_TAG_template_type_param
9520 || child_die->tag == DW_TAG_template_value_param)
9522 struct symbol *arg = new_symbol (child_die, NULL, cu);
9525 VEC_safe_push (symbolp, template_args, arg);
9528 process_die (child_die, cu);
9529 child_die = sibling_die (child_die);
9533 inherit_abstract_dies (die, cu);
9535 /* If we have a DW_AT_specification, we might need to import using
9536 directives from the context of the specification DIE. See the
9537 comment in determine_prefix. */
9538 if (cu->language == language_cplus
9539 && dwarf2_attr (die, DW_AT_specification, cu))
9541 struct dwarf2_cu *spec_cu = cu;
9542 struct die_info *spec_die = die_specification (die, &spec_cu);
9546 child_die = spec_die->child;
9547 while (child_die && child_die->tag)
9549 if (child_die->tag == DW_TAG_imported_module)
9550 process_die (child_die, spec_cu);
9551 child_die = sibling_die (child_die);
9554 /* In some cases, GCC generates specification DIEs that
9555 themselves contain DW_AT_specification attributes. */
9556 spec_die = die_specification (spec_die, &spec_cu);
9560 new = pop_context ();
9561 /* Make a block for the local symbols within. */
9562 block = finish_block (new->name, &local_symbols, new->old_blocks,
9563 lowpc, highpc, objfile);
9565 /* For C++, set the block's scope. */
9566 if ((cu->language == language_cplus || cu->language == language_fortran)
9567 && cu->processing_has_namespace_info)
9568 block_set_scope (block, determine_prefix (die, cu),
9569 &objfile->objfile_obstack);
9571 /* If we have address ranges, record them. */
9572 dwarf2_record_block_ranges (die, block, baseaddr, cu);
9574 /* Attach template arguments to function. */
9575 if (! VEC_empty (symbolp, template_args))
9577 gdb_assert (templ_func != NULL);
9579 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
9580 templ_func->template_arguments
9581 = obstack_alloc (&objfile->objfile_obstack,
9582 (templ_func->n_template_arguments
9583 * sizeof (struct symbol *)));
9584 memcpy (templ_func->template_arguments,
9585 VEC_address (symbolp, template_args),
9586 (templ_func->n_template_arguments * sizeof (struct symbol *)));
9587 VEC_free (symbolp, template_args);
9590 /* In C++, we can have functions nested inside functions (e.g., when
9591 a function declares a class that has methods). This means that
9592 when we finish processing a function scope, we may need to go
9593 back to building a containing block's symbol lists. */
9594 local_symbols = new->locals;
9595 using_directives = new->using_directives;
9597 /* If we've finished processing a top-level function, subsequent
9598 symbols go in the file symbol list. */
9599 if (outermost_context_p ())
9600 cu->list_in_scope = &file_symbols;
9603 /* Process all the DIES contained within a lexical block scope. Start
9604 a new scope, process the dies, and then close the scope. */
9607 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
9609 struct objfile *objfile = cu->objfile;
9610 struct context_stack *new;
9611 CORE_ADDR lowpc, highpc;
9612 struct die_info *child_die;
9615 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9617 /* Ignore blocks with missing or invalid low and high pc attributes. */
9618 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9619 as multiple lexical blocks? Handling children in a sane way would
9620 be nasty. Might be easier to properly extend generic blocks to
9622 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
9627 push_context (0, lowpc);
9628 if (die->child != NULL)
9630 child_die = die->child;
9631 while (child_die && child_die->tag)
9633 process_die (child_die, cu);
9634 child_die = sibling_die (child_die);
9637 new = pop_context ();
9639 if (local_symbols != NULL || using_directives != NULL)
9642 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
9645 /* Note that recording ranges after traversing children, as we
9646 do here, means that recording a parent's ranges entails
9647 walking across all its children's ranges as they appear in
9648 the address map, which is quadratic behavior.
9650 It would be nicer to record the parent's ranges before
9651 traversing its children, simply overriding whatever you find
9652 there. But since we don't even decide whether to create a
9653 block until after we've traversed its children, that's hard
9655 dwarf2_record_block_ranges (die, block, baseaddr, cu);
9657 local_symbols = new->locals;
9658 using_directives = new->using_directives;
9661 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9664 read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu)
9666 struct objfile *objfile = cu->objfile;
9667 struct gdbarch *gdbarch = get_objfile_arch (objfile);
9668 CORE_ADDR pc, baseaddr;
9669 struct attribute *attr;
9670 struct call_site *call_site, call_site_local;
9673 struct die_info *child_die;
9675 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9677 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
9680 complaint (&symfile_complaints,
9681 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9682 "DIE 0x%x [in module %s]"),
9683 die->offset.sect_off, objfile->name);
9686 pc = DW_ADDR (attr) + baseaddr;
9688 if (cu->call_site_htab == NULL)
9689 cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq,
9690 NULL, &objfile->objfile_obstack,
9691 hashtab_obstack_allocate, NULL);
9692 call_site_local.pc = pc;
9693 slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT);
9696 complaint (&symfile_complaints,
9697 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9698 "DIE 0x%x [in module %s]"),
9699 paddress (gdbarch, pc), die->offset.sect_off, objfile->name);
9703 /* Count parameters at the caller. */
9706 for (child_die = die->child; child_die && child_die->tag;
9707 child_die = sibling_die (child_die))
9709 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
9711 complaint (&symfile_complaints,
9712 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9713 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9714 child_die->tag, child_die->offset.sect_off, objfile->name);
9721 call_site = obstack_alloc (&objfile->objfile_obstack,
9722 (sizeof (*call_site)
9723 + (sizeof (*call_site->parameter)
9726 memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter));
9729 if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu))
9731 struct die_info *func_die;
9733 /* Skip also over DW_TAG_inlined_subroutine. */
9734 for (func_die = die->parent;
9735 func_die && func_die->tag != DW_TAG_subprogram
9736 && func_die->tag != DW_TAG_subroutine_type;
9737 func_die = func_die->parent);
9739 /* DW_AT_GNU_all_call_sites is a superset
9740 of DW_AT_GNU_all_tail_call_sites. */
9742 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu)
9743 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu))
9745 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9746 not complete. But keep CALL_SITE for look ups via call_site_htab,
9747 both the initial caller containing the real return address PC and
9748 the final callee containing the current PC of a chain of tail
9749 calls do not need to have the tail call list complete. But any
9750 function candidate for a virtual tail call frame searched via
9751 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9752 determined unambiguously. */
9756 struct type *func_type = NULL;
9759 func_type = get_die_type (func_die, cu);
9760 if (func_type != NULL)
9762 gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC);
9764 /* Enlist this call site to the function. */
9765 call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type);
9766 TYPE_TAIL_CALL_LIST (func_type) = call_site;
9769 complaint (&symfile_complaints,
9770 _("Cannot find function owning DW_TAG_GNU_call_site "
9771 "DIE 0x%x [in module %s]"),
9772 die->offset.sect_off, objfile->name);
9776 attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu);
9778 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
9779 SET_FIELD_DWARF_BLOCK (call_site->target, NULL);
9780 if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0))
9781 /* Keep NULL DWARF_BLOCK. */;
9782 else if (attr_form_is_block (attr))
9784 struct dwarf2_locexpr_baton *dlbaton;
9786 dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton));
9787 dlbaton->data = DW_BLOCK (attr)->data;
9788 dlbaton->size = DW_BLOCK (attr)->size;
9789 dlbaton->per_cu = cu->per_cu;
9791 SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton);
9793 else if (is_ref_attr (attr))
9795 struct dwarf2_cu *target_cu = cu;
9796 struct die_info *target_die;
9798 target_die = follow_die_ref_or_sig (die, attr, &target_cu);
9799 gdb_assert (target_cu->objfile == objfile);
9800 if (die_is_declaration (target_die, target_cu))
9802 const char *target_physname;
9804 target_physname = dwarf2_physname (NULL, target_die, target_cu);
9805 if (target_physname == NULL)
9806 complaint (&symfile_complaints,
9807 _("DW_AT_GNU_call_site_target target DIE has invalid "
9808 "physname, for referencing DIE 0x%x [in module %s]"),
9809 die->offset.sect_off, objfile->name);
9811 SET_FIELD_PHYSNAME (call_site->target, target_physname);
9817 /* DW_AT_entry_pc should be preferred. */
9818 if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL))
9819 complaint (&symfile_complaints,
9820 _("DW_AT_GNU_call_site_target target DIE has invalid "
9821 "low pc, for referencing DIE 0x%x [in module %s]"),
9822 die->offset.sect_off, objfile->name);
9824 SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr);
9828 complaint (&symfile_complaints,
9829 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9830 "block nor reference, for DIE 0x%x [in module %s]"),
9831 die->offset.sect_off, objfile->name);
9833 call_site->per_cu = cu->per_cu;
9835 for (child_die = die->child;
9836 child_die && child_die->tag;
9837 child_die = sibling_die (child_die))
9839 struct call_site_parameter *parameter;
9840 struct attribute *loc, *origin;
9842 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
9844 /* Already printed the complaint above. */
9848 gdb_assert (call_site->parameter_count < nparams);
9849 parameter = &call_site->parameter[call_site->parameter_count];
9851 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9852 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9853 register is contained in DW_AT_GNU_call_site_value. */
9855 loc = dwarf2_attr (child_die, DW_AT_location, cu);
9856 origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
9857 if (loc == NULL && origin != NULL && is_ref_attr (origin))
9861 parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET;
9862 offset = dwarf2_get_ref_die_offset (origin);
9863 if (!offset_in_cu_p (&cu->header, offset))
9865 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9866 binding can be done only inside one CU. Such referenced DIE
9867 therefore cannot be even moved to DW_TAG_partial_unit. */
9868 complaint (&symfile_complaints,
9869 _("DW_AT_abstract_origin offset is not in CU for "
9870 "DW_TAG_GNU_call_site child DIE 0x%x "
9872 child_die->offset.sect_off, objfile->name);
9875 parameter->u.param_offset.cu_off = (offset.sect_off
9876 - cu->header.offset.sect_off);
9878 else if (loc == NULL || origin != NULL || !attr_form_is_block (loc))
9880 complaint (&symfile_complaints,
9881 _("No DW_FORM_block* DW_AT_location for "
9882 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9883 child_die->offset.sect_off, objfile->name);
9888 parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg
9889 (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]);
9890 if (parameter->u.dwarf_reg != -1)
9891 parameter->kind = CALL_SITE_PARAMETER_DWARF_REG;
9892 else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data,
9893 &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size],
9894 ¶meter->u.fb_offset))
9895 parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET;
9898 complaint (&symfile_complaints,
9899 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9900 "for DW_FORM_block* DW_AT_location is supported for "
9901 "DW_TAG_GNU_call_site child DIE 0x%x "
9903 child_die->offset.sect_off, objfile->name);
9908 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu);
9909 if (!attr_form_is_block (attr))
9911 complaint (&symfile_complaints,
9912 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9913 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9914 child_die->offset.sect_off, objfile->name);
9917 parameter->value = DW_BLOCK (attr)->data;
9918 parameter->value_size = DW_BLOCK (attr)->size;
9920 /* Parameters are not pre-cleared by memset above. */
9921 parameter->data_value = NULL;
9922 parameter->data_value_size = 0;
9923 call_site->parameter_count++;
9925 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu);
9928 if (!attr_form_is_block (attr))
9929 complaint (&symfile_complaints,
9930 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9931 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9932 child_die->offset.sect_off, objfile->name);
9935 parameter->data_value = DW_BLOCK (attr)->data;
9936 parameter->data_value_size = DW_BLOCK (attr)->size;
9942 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9943 Return 1 if the attributes are present and valid, otherwise, return 0.
9944 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9947 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
9948 CORE_ADDR *high_return, struct dwarf2_cu *cu,
9949 struct partial_symtab *ranges_pst)
9951 struct objfile *objfile = cu->objfile;
9952 struct comp_unit_head *cu_header = &cu->header;
9953 bfd *obfd = objfile->obfd;
9954 unsigned int addr_size = cu_header->addr_size;
9955 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
9956 /* Base address selection entry. */
9967 found_base = cu->base_known;
9968 base = cu->base_address;
9970 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
9971 if (offset >= dwarf2_per_objfile->ranges.size)
9973 complaint (&symfile_complaints,
9974 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9978 buffer = dwarf2_per_objfile->ranges.buffer + offset;
9980 /* Read in the largest possible address. */
9981 marker = read_address (obfd, buffer, cu, &dummy);
9982 if ((marker & mask) == mask)
9984 /* If we found the largest possible address, then
9985 read the base address. */
9986 base = read_address (obfd, buffer + addr_size, cu, &dummy);
9987 buffer += 2 * addr_size;
9988 offset += 2 * addr_size;
9994 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9998 CORE_ADDR range_beginning, range_end;
10000 range_beginning = read_address (obfd, buffer, cu, &dummy);
10001 buffer += addr_size;
10002 range_end = read_address (obfd, buffer, cu, &dummy);
10003 buffer += addr_size;
10004 offset += 2 * addr_size;
10006 /* An end of list marker is a pair of zero addresses. */
10007 if (range_beginning == 0 && range_end == 0)
10008 /* Found the end of list entry. */
10011 /* Each base address selection entry is a pair of 2 values.
10012 The first is the largest possible address, the second is
10013 the base address. Check for a base address here. */
10014 if ((range_beginning & mask) == mask)
10016 /* If we found the largest possible address, then
10017 read the base address. */
10018 base = read_address (obfd, buffer + addr_size, cu, &dummy);
10025 /* We have no valid base address for the ranges
10027 complaint (&symfile_complaints,
10028 _("Invalid .debug_ranges data (no base address)"));
10032 if (range_beginning > range_end)
10034 /* Inverted range entries are invalid. */
10035 complaint (&symfile_complaints,
10036 _("Invalid .debug_ranges data (inverted range)"));
10040 /* Empty range entries have no effect. */
10041 if (range_beginning == range_end)
10044 range_beginning += base;
10047 /* A not-uncommon case of bad debug info.
10048 Don't pollute the addrmap with bad data. */
10049 if (range_beginning + baseaddr == 0
10050 && !dwarf2_per_objfile->has_section_at_zero)
10052 complaint (&symfile_complaints,
10053 _(".debug_ranges entry has start address of zero"
10054 " [in module %s]"), objfile->name);
10058 if (ranges_pst != NULL)
10059 addrmap_set_empty (objfile->psymtabs_addrmap,
10060 range_beginning + baseaddr,
10061 range_end - 1 + baseaddr,
10064 /* FIXME: This is recording everything as a low-high
10065 segment of consecutive addresses. We should have a
10066 data structure for discontiguous block ranges
10070 low = range_beginning;
10076 if (range_beginning < low)
10077 low = range_beginning;
10078 if (range_end > high)
10084 /* If the first entry is an end-of-list marker, the range
10085 describes an empty scope, i.e. no instructions. */
10091 *high_return = high;
10095 /* Get low and high pc attributes from a die. Return 1 if the attributes
10096 are present and valid, otherwise, return 0. Return -1 if the range is
10097 discontinuous, i.e. derived from DW_AT_ranges information. */
10100 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
10101 CORE_ADDR *highpc, struct dwarf2_cu *cu,
10102 struct partial_symtab *pst)
10104 struct attribute *attr;
10105 struct attribute *attr_high;
10107 CORE_ADDR high = 0;
10110 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
10113 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10116 low = DW_ADDR (attr);
10117 if (attr_high->form == DW_FORM_addr
10118 || attr_high->form == DW_FORM_GNU_addr_index)
10119 high = DW_ADDR (attr_high);
10121 high = low + DW_UNSND (attr_high);
10124 /* Found high w/o low attribute. */
10127 /* Found consecutive range of addresses. */
10132 attr = dwarf2_attr (die, DW_AT_ranges, cu);
10135 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10136 We take advantage of the fact that DW_AT_ranges does not appear
10137 in DW_TAG_compile_unit of DWO files. */
10138 int need_ranges_base = die->tag != DW_TAG_compile_unit;
10139 unsigned int ranges_offset = (DW_UNSND (attr)
10140 + (need_ranges_base
10144 /* Value of the DW_AT_ranges attribute is the offset in the
10145 .debug_ranges section. */
10146 if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst))
10148 /* Found discontinuous range of addresses. */
10153 /* read_partial_die has also the strict LOW < HIGH requirement. */
10157 /* When using the GNU linker, .gnu.linkonce. sections are used to
10158 eliminate duplicate copies of functions and vtables and such.
10159 The linker will arbitrarily choose one and discard the others.
10160 The AT_*_pc values for such functions refer to local labels in
10161 these sections. If the section from that file was discarded, the
10162 labels are not in the output, so the relocs get a value of 0.
10163 If this is a discarded function, mark the pc bounds as invalid,
10164 so that GDB will ignore it. */
10165 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
10174 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10175 its low and high PC addresses. Do nothing if these addresses could not
10176 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10177 and HIGHPC to the high address if greater than HIGHPC. */
10180 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
10181 CORE_ADDR *lowpc, CORE_ADDR *highpc,
10182 struct dwarf2_cu *cu)
10184 CORE_ADDR low, high;
10185 struct die_info *child = die->child;
10187 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
10189 *lowpc = min (*lowpc, low);
10190 *highpc = max (*highpc, high);
10193 /* If the language does not allow nested subprograms (either inside
10194 subprograms or lexical blocks), we're done. */
10195 if (cu->language != language_ada)
10198 /* Check all the children of the given DIE. If it contains nested
10199 subprograms, then check their pc bounds. Likewise, we need to
10200 check lexical blocks as well, as they may also contain subprogram
10202 while (child && child->tag)
10204 if (child->tag == DW_TAG_subprogram
10205 || child->tag == DW_TAG_lexical_block)
10206 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
10207 child = sibling_die (child);
10211 /* Get the low and high pc's represented by the scope DIE, and store
10212 them in *LOWPC and *HIGHPC. If the correct values can't be
10213 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10216 get_scope_pc_bounds (struct die_info *die,
10217 CORE_ADDR *lowpc, CORE_ADDR *highpc,
10218 struct dwarf2_cu *cu)
10220 CORE_ADDR best_low = (CORE_ADDR) -1;
10221 CORE_ADDR best_high = (CORE_ADDR) 0;
10222 CORE_ADDR current_low, current_high;
10224 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
10226 best_low = current_low;
10227 best_high = current_high;
10231 struct die_info *child = die->child;
10233 while (child && child->tag)
10235 switch (child->tag) {
10236 case DW_TAG_subprogram:
10237 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
10239 case DW_TAG_namespace:
10240 case DW_TAG_module:
10241 /* FIXME: carlton/2004-01-16: Should we do this for
10242 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10243 that current GCC's always emit the DIEs corresponding
10244 to definitions of methods of classes as children of a
10245 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10246 the DIEs giving the declarations, which could be
10247 anywhere). But I don't see any reason why the
10248 standards says that they have to be there. */
10249 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
10251 if (current_low != ((CORE_ADDR) -1))
10253 best_low = min (best_low, current_low);
10254 best_high = max (best_high, current_high);
10262 child = sibling_die (child);
10267 *highpc = best_high;
10270 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10274 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
10275 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
10277 struct objfile *objfile = cu->objfile;
10278 struct attribute *attr;
10279 struct attribute *attr_high;
10281 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
10284 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
10287 CORE_ADDR low = DW_ADDR (attr);
10289 if (attr_high->form == DW_FORM_addr
10290 || attr_high->form == DW_FORM_GNU_addr_index)
10291 high = DW_ADDR (attr_high);
10293 high = low + DW_UNSND (attr_high);
10295 record_block_range (block, baseaddr + low, baseaddr + high - 1);
10299 attr = dwarf2_attr (die, DW_AT_ranges, cu);
10302 bfd *obfd = objfile->obfd;
10303 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10304 We take advantage of the fact that DW_AT_ranges does not appear
10305 in DW_TAG_compile_unit of DWO files. */
10306 int need_ranges_base = die->tag != DW_TAG_compile_unit;
10308 /* The value of the DW_AT_ranges attribute is the offset of the
10309 address range list in the .debug_ranges section. */
10310 unsigned long offset = (DW_UNSND (attr)
10311 + (need_ranges_base ? cu->ranges_base : 0));
10312 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
10314 /* For some target architectures, but not others, the
10315 read_address function sign-extends the addresses it returns.
10316 To recognize base address selection entries, we need a
10318 unsigned int addr_size = cu->header.addr_size;
10319 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
10321 /* The base address, to which the next pair is relative. Note
10322 that this 'base' is a DWARF concept: most entries in a range
10323 list are relative, to reduce the number of relocs against the
10324 debugging information. This is separate from this function's
10325 'baseaddr' argument, which GDB uses to relocate debugging
10326 information from a shared library based on the address at
10327 which the library was loaded. */
10328 CORE_ADDR base = cu->base_address;
10329 int base_known = cu->base_known;
10331 gdb_assert (dwarf2_per_objfile->ranges.readin);
10332 if (offset >= dwarf2_per_objfile->ranges.size)
10334 complaint (&symfile_complaints,
10335 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10342 unsigned int bytes_read;
10343 CORE_ADDR start, end;
10345 start = read_address (obfd, buffer, cu, &bytes_read);
10346 buffer += bytes_read;
10347 end = read_address (obfd, buffer, cu, &bytes_read);
10348 buffer += bytes_read;
10350 /* Did we find the end of the range list? */
10351 if (start == 0 && end == 0)
10354 /* Did we find a base address selection entry? */
10355 else if ((start & base_select_mask) == base_select_mask)
10361 /* We found an ordinary address range. */
10366 complaint (&symfile_complaints,
10367 _("Invalid .debug_ranges data "
10368 "(no base address)"));
10374 /* Inverted range entries are invalid. */
10375 complaint (&symfile_complaints,
10376 _("Invalid .debug_ranges data "
10377 "(inverted range)"));
10381 /* Empty range entries have no effect. */
10385 start += base + baseaddr;
10386 end += base + baseaddr;
10388 /* A not-uncommon case of bad debug info.
10389 Don't pollute the addrmap with bad data. */
10390 if (start == 0 && !dwarf2_per_objfile->has_section_at_zero)
10392 complaint (&symfile_complaints,
10393 _(".debug_ranges entry has start address of zero"
10394 " [in module %s]"), objfile->name);
10398 record_block_range (block, start, end - 1);
10404 /* Check whether the producer field indicates either of GCC < 4.6, or the
10405 Intel C/C++ compiler, and cache the result in CU. */
10408 check_producer (struct dwarf2_cu *cu)
10411 int major, minor, release;
10413 if (cu->producer == NULL)
10415 /* For unknown compilers expect their behavior is DWARF version
10418 GCC started to support .debug_types sections by -gdwarf-4 since
10419 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10420 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10421 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10422 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10424 else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0)
10426 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10428 cs = &cu->producer[strlen ("GNU ")];
10429 while (*cs && !isdigit (*cs))
10431 if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3)
10433 /* Not recognized as GCC. */
10437 cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6);
10438 cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3);
10441 else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10442 cu->producer_is_icc = 1;
10445 /* For other non-GCC compilers, expect their behavior is DWARF version
10449 cu->checked_producer = 1;
10452 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10453 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10454 during 4.6.0 experimental. */
10457 producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu)
10459 if (!cu->checked_producer)
10460 check_producer (cu);
10462 return cu->producer_is_gxx_lt_4_6;
10465 /* Return the default accessibility type if it is not overriden by
10466 DW_AT_accessibility. */
10468 static enum dwarf_access_attribute
10469 dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu)
10471 if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu))
10473 /* The default DWARF 2 accessibility for members is public, the default
10474 accessibility for inheritance is private. */
10476 if (die->tag != DW_TAG_inheritance)
10477 return DW_ACCESS_public;
10479 return DW_ACCESS_private;
10483 /* DWARF 3+ defines the default accessibility a different way. The same
10484 rules apply now for DW_TAG_inheritance as for the members and it only
10485 depends on the container kind. */
10487 if (die->parent->tag == DW_TAG_class_type)
10488 return DW_ACCESS_private;
10490 return DW_ACCESS_public;
10494 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10495 offset. If the attribute was not found return 0, otherwise return
10496 1. If it was found but could not properly be handled, set *OFFSET
10500 handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu,
10503 struct attribute *attr;
10505 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
10510 /* Note that we do not check for a section offset first here.
10511 This is because DW_AT_data_member_location is new in DWARF 4,
10512 so if we see it, we can assume that a constant form is really
10513 a constant and not a section offset. */
10514 if (attr_form_is_constant (attr))
10515 *offset = dwarf2_get_attr_constant_value (attr, 0);
10516 else if (attr_form_is_section_offset (attr))
10517 dwarf2_complex_location_expr_complaint ();
10518 else if (attr_form_is_block (attr))
10519 *offset = decode_locdesc (DW_BLOCK (attr), cu);
10521 dwarf2_complex_location_expr_complaint ();
10529 /* Add an aggregate field to the field list. */
10532 dwarf2_add_field (struct field_info *fip, struct die_info *die,
10533 struct dwarf2_cu *cu)
10535 struct objfile *objfile = cu->objfile;
10536 struct gdbarch *gdbarch = get_objfile_arch (objfile);
10537 struct nextfield *new_field;
10538 struct attribute *attr;
10540 const char *fieldname = "";
10542 /* Allocate a new field list entry and link it in. */
10543 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
10544 make_cleanup (xfree, new_field);
10545 memset (new_field, 0, sizeof (struct nextfield));
10547 if (die->tag == DW_TAG_inheritance)
10549 new_field->next = fip->baseclasses;
10550 fip->baseclasses = new_field;
10554 new_field->next = fip->fields;
10555 fip->fields = new_field;
10559 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
10561 new_field->accessibility = DW_UNSND (attr);
10563 new_field->accessibility = dwarf2_default_access_attribute (die, cu);
10564 if (new_field->accessibility != DW_ACCESS_public)
10565 fip->non_public_fields = 1;
10567 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
10569 new_field->virtuality = DW_UNSND (attr);
10571 new_field->virtuality = DW_VIRTUALITY_none;
10573 fp = &new_field->field;
10575 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
10579 /* Data member other than a C++ static data member. */
10581 /* Get type of field. */
10582 fp->type = die_type (die, cu);
10584 SET_FIELD_BITPOS (*fp, 0);
10586 /* Get bit size of field (zero if none). */
10587 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
10590 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
10594 FIELD_BITSIZE (*fp) = 0;
10597 /* Get bit offset of field. */
10598 if (handle_data_member_location (die, cu, &offset))
10599 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
10600 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
10603 if (gdbarch_bits_big_endian (gdbarch))
10605 /* For big endian bits, the DW_AT_bit_offset gives the
10606 additional bit offset from the MSB of the containing
10607 anonymous object to the MSB of the field. We don't
10608 have to do anything special since we don't need to
10609 know the size of the anonymous object. */
10610 SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr));
10614 /* For little endian bits, compute the bit offset to the
10615 MSB of the anonymous object, subtract off the number of
10616 bits from the MSB of the field to the MSB of the
10617 object, and then subtract off the number of bits of
10618 the field itself. The result is the bit offset of
10619 the LSB of the field. */
10620 int anonymous_size;
10621 int bit_offset = DW_UNSND (attr);
10623 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
10626 /* The size of the anonymous object containing
10627 the bit field is explicit, so use the
10628 indicated size (in bytes). */
10629 anonymous_size = DW_UNSND (attr);
10633 /* The size of the anonymous object containing
10634 the bit field must be inferred from the type
10635 attribute of the data member containing the
10637 anonymous_size = TYPE_LENGTH (fp->type);
10639 SET_FIELD_BITPOS (*fp,
10640 (FIELD_BITPOS (*fp)
10641 + anonymous_size * bits_per_byte
10642 - bit_offset - FIELD_BITSIZE (*fp)));
10646 /* Get name of field. */
10647 fieldname = dwarf2_name (die, cu);
10648 if (fieldname == NULL)
10651 /* The name is already allocated along with this objfile, so we don't
10652 need to duplicate it for the type. */
10653 fp->name = fieldname;
10655 /* Change accessibility for artificial fields (e.g. virtual table
10656 pointer or virtual base class pointer) to private. */
10657 if (dwarf2_attr (die, DW_AT_artificial, cu))
10659 FIELD_ARTIFICIAL (*fp) = 1;
10660 new_field->accessibility = DW_ACCESS_private;
10661 fip->non_public_fields = 1;
10664 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
10666 /* C++ static member. */
10668 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10669 is a declaration, but all versions of G++ as of this writing
10670 (so through at least 3.2.1) incorrectly generate
10671 DW_TAG_variable tags. */
10673 const char *physname;
10675 /* Get name of field. */
10676 fieldname = dwarf2_name (die, cu);
10677 if (fieldname == NULL)
10680 attr = dwarf2_attr (die, DW_AT_const_value, cu);
10682 /* Only create a symbol if this is an external value.
10683 new_symbol checks this and puts the value in the global symbol
10684 table, which we want. If it is not external, new_symbol
10685 will try to put the value in cu->list_in_scope which is wrong. */
10686 && dwarf2_flag_true_p (die, DW_AT_external, cu))
10688 /* A static const member, not much different than an enum as far as
10689 we're concerned, except that we can support more types. */
10690 new_symbol (die, NULL, cu);
10693 /* Get physical name. */
10694 physname = dwarf2_physname (fieldname, die, cu);
10696 /* The name is already allocated along with this objfile, so we don't
10697 need to duplicate it for the type. */
10698 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
10699 FIELD_TYPE (*fp) = die_type (die, cu);
10700 FIELD_NAME (*fp) = fieldname;
10702 else if (die->tag == DW_TAG_inheritance)
10706 /* C++ base class field. */
10707 if (handle_data_member_location (die, cu, &offset))
10708 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
10709 FIELD_BITSIZE (*fp) = 0;
10710 FIELD_TYPE (*fp) = die_type (die, cu);
10711 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
10712 fip->nbaseclasses++;
10716 /* Add a typedef defined in the scope of the FIP's class. */
10719 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
10720 struct dwarf2_cu *cu)
10722 struct objfile *objfile = cu->objfile;
10723 struct typedef_field_list *new_field;
10724 struct attribute *attr;
10725 struct typedef_field *fp;
10726 char *fieldname = "";
10728 /* Allocate a new field list entry and link it in. */
10729 new_field = xzalloc (sizeof (*new_field));
10730 make_cleanup (xfree, new_field);
10732 gdb_assert (die->tag == DW_TAG_typedef);
10734 fp = &new_field->field;
10736 /* Get name of field. */
10737 fp->name = dwarf2_name (die, cu);
10738 if (fp->name == NULL)
10741 fp->type = read_type_die (die, cu);
10743 new_field->next = fip->typedef_field_list;
10744 fip->typedef_field_list = new_field;
10745 fip->typedef_field_list_count++;
10748 /* Create the vector of fields, and attach it to the type. */
10751 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
10752 struct dwarf2_cu *cu)
10754 int nfields = fip->nfields;
10756 /* Record the field count, allocate space for the array of fields,
10757 and create blank accessibility bitfields if necessary. */
10758 TYPE_NFIELDS (type) = nfields;
10759 TYPE_FIELDS (type) = (struct field *)
10760 TYPE_ALLOC (type, sizeof (struct field) * nfields);
10761 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
10763 if (fip->non_public_fields && cu->language != language_ada)
10765 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10767 TYPE_FIELD_PRIVATE_BITS (type) =
10768 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
10769 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
10771 TYPE_FIELD_PROTECTED_BITS (type) =
10772 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
10773 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
10775 TYPE_FIELD_IGNORE_BITS (type) =
10776 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
10777 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
10780 /* If the type has baseclasses, allocate and clear a bit vector for
10781 TYPE_FIELD_VIRTUAL_BITS. */
10782 if (fip->nbaseclasses && cu->language != language_ada)
10784 int num_bytes = B_BYTES (fip->nbaseclasses);
10785 unsigned char *pointer;
10787 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10788 pointer = TYPE_ALLOC (type, num_bytes);
10789 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
10790 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
10791 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
10794 /* Copy the saved-up fields into the field vector. Start from the head of
10795 the list, adding to the tail of the field array, so that they end up in
10796 the same order in the array in which they were added to the list. */
10797 while (nfields-- > 0)
10799 struct nextfield *fieldp;
10803 fieldp = fip->fields;
10804 fip->fields = fieldp->next;
10808 fieldp = fip->baseclasses;
10809 fip->baseclasses = fieldp->next;
10812 TYPE_FIELD (type, nfields) = fieldp->field;
10813 switch (fieldp->accessibility)
10815 case DW_ACCESS_private:
10816 if (cu->language != language_ada)
10817 SET_TYPE_FIELD_PRIVATE (type, nfields);
10820 case DW_ACCESS_protected:
10821 if (cu->language != language_ada)
10822 SET_TYPE_FIELD_PROTECTED (type, nfields);
10825 case DW_ACCESS_public:
10829 /* Unknown accessibility. Complain and treat it as public. */
10831 complaint (&symfile_complaints, _("unsupported accessibility %d"),
10832 fieldp->accessibility);
10836 if (nfields < fip->nbaseclasses)
10838 switch (fieldp->virtuality)
10840 case DW_VIRTUALITY_virtual:
10841 case DW_VIRTUALITY_pure_virtual:
10842 if (cu->language == language_ada)
10843 error (_("unexpected virtuality in component of Ada type"));
10844 SET_TYPE_FIELD_VIRTUAL (type, nfields);
10851 /* Return true if this member function is a constructor, false
10855 dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu)
10857 const char *fieldname;
10858 const char *typename;
10861 if (die->parent == NULL)
10864 if (die->parent->tag != DW_TAG_structure_type
10865 && die->parent->tag != DW_TAG_union_type
10866 && die->parent->tag != DW_TAG_class_type)
10869 fieldname = dwarf2_name (die, cu);
10870 typename = dwarf2_name (die->parent, cu);
10871 if (fieldname == NULL || typename == NULL)
10874 len = strlen (fieldname);
10875 return (strncmp (fieldname, typename, len) == 0
10876 && (typename[len] == '\0' || typename[len] == '<'));
10879 /* Add a member function to the proper fieldlist. */
10882 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
10883 struct type *type, struct dwarf2_cu *cu)
10885 struct objfile *objfile = cu->objfile;
10886 struct attribute *attr;
10887 struct fnfieldlist *flp;
10889 struct fn_field *fnp;
10890 const char *fieldname;
10891 struct nextfnfield *new_fnfield;
10892 struct type *this_type;
10893 enum dwarf_access_attribute accessibility;
10895 if (cu->language == language_ada)
10896 error (_("unexpected member function in Ada type"));
10898 /* Get name of member function. */
10899 fieldname = dwarf2_name (die, cu);
10900 if (fieldname == NULL)
10903 /* Look up member function name in fieldlist. */
10904 for (i = 0; i < fip->nfnfields; i++)
10906 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
10910 /* Create new list element if necessary. */
10911 if (i < fip->nfnfields)
10912 flp = &fip->fnfieldlists[i];
10915 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
10917 fip->fnfieldlists = (struct fnfieldlist *)
10918 xrealloc (fip->fnfieldlists,
10919 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
10920 * sizeof (struct fnfieldlist));
10921 if (fip->nfnfields == 0)
10922 make_cleanup (free_current_contents, &fip->fnfieldlists);
10924 flp = &fip->fnfieldlists[fip->nfnfields];
10925 flp->name = fieldname;
10928 i = fip->nfnfields++;
10931 /* Create a new member function field and chain it to the field list
10933 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
10934 make_cleanup (xfree, new_fnfield);
10935 memset (new_fnfield, 0, sizeof (struct nextfnfield));
10936 new_fnfield->next = flp->head;
10937 flp->head = new_fnfield;
10940 /* Fill in the member function field info. */
10941 fnp = &new_fnfield->fnfield;
10943 /* Delay processing of the physname until later. */
10944 if (cu->language == language_cplus || cu->language == language_java)
10946 add_to_method_list (type, i, flp->length - 1, fieldname,
10951 const char *physname = dwarf2_physname (fieldname, die, cu);
10952 fnp->physname = physname ? physname : "";
10955 fnp->type = alloc_type (objfile);
10956 this_type = read_type_die (die, cu);
10957 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
10959 int nparams = TYPE_NFIELDS (this_type);
10961 /* TYPE is the domain of this method, and THIS_TYPE is the type
10962 of the method itself (TYPE_CODE_METHOD). */
10963 smash_to_method_type (fnp->type, type,
10964 TYPE_TARGET_TYPE (this_type),
10965 TYPE_FIELDS (this_type),
10966 TYPE_NFIELDS (this_type),
10967 TYPE_VARARGS (this_type));
10969 /* Handle static member functions.
10970 Dwarf2 has no clean way to discern C++ static and non-static
10971 member functions. G++ helps GDB by marking the first
10972 parameter for non-static member functions (which is the this
10973 pointer) as artificial. We obtain this information from
10974 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10975 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
10976 fnp->voffset = VOFFSET_STATIC;
10979 complaint (&symfile_complaints, _("member function type missing for '%s'"),
10980 dwarf2_full_name (fieldname, die, cu));
10982 /* Get fcontext from DW_AT_containing_type if present. */
10983 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
10984 fnp->fcontext = die_containing_type (die, cu);
10986 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10987 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10989 /* Get accessibility. */
10990 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
10992 accessibility = DW_UNSND (attr);
10994 accessibility = dwarf2_default_access_attribute (die, cu);
10995 switch (accessibility)
10997 case DW_ACCESS_private:
10998 fnp->is_private = 1;
11000 case DW_ACCESS_protected:
11001 fnp->is_protected = 1;
11005 /* Check for artificial methods. */
11006 attr = dwarf2_attr (die, DW_AT_artificial, cu);
11007 if (attr && DW_UNSND (attr) != 0)
11008 fnp->is_artificial = 1;
11010 fnp->is_constructor = dwarf2_is_constructor (die, cu);
11012 /* Get index in virtual function table if it is a virtual member
11013 function. For older versions of GCC, this is an offset in the
11014 appropriate virtual table, as specified by DW_AT_containing_type.
11015 For everyone else, it is an expression to be evaluated relative
11016 to the object address. */
11018 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
11021 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
11023 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
11025 /* Old-style GCC. */
11026 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
11028 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
11029 || (DW_BLOCK (attr)->size > 1
11030 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
11031 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
11033 struct dwarf_block blk;
11036 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
11038 blk.size = DW_BLOCK (attr)->size - offset;
11039 blk.data = DW_BLOCK (attr)->data + offset;
11040 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
11041 if ((fnp->voffset % cu->header.addr_size) != 0)
11042 dwarf2_complex_location_expr_complaint ();
11044 fnp->voffset /= cu->header.addr_size;
11048 dwarf2_complex_location_expr_complaint ();
11050 if (!fnp->fcontext)
11051 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
11053 else if (attr_form_is_section_offset (attr))
11055 dwarf2_complex_location_expr_complaint ();
11059 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
11065 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
11066 if (attr && DW_UNSND (attr))
11068 /* GCC does this, as of 2008-08-25; PR debug/37237. */
11069 complaint (&symfile_complaints,
11070 _("Member function \"%s\" (offset %d) is virtual "
11071 "but the vtable offset is not specified"),
11072 fieldname, die->offset.sect_off);
11073 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11074 TYPE_CPLUS_DYNAMIC (type) = 1;
11079 /* Create the vector of member function fields, and attach it to the type. */
11082 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
11083 struct dwarf2_cu *cu)
11085 struct fnfieldlist *flp;
11088 if (cu->language == language_ada)
11089 error (_("unexpected member functions in Ada type"));
11091 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11092 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
11093 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
11095 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
11097 struct nextfnfield *nfp = flp->head;
11098 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
11101 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
11102 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
11103 fn_flp->fn_fields = (struct fn_field *)
11104 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
11105 for (k = flp->length; (k--, nfp); nfp = nfp->next)
11106 fn_flp->fn_fields[k] = nfp->fnfield;
11109 TYPE_NFN_FIELDS (type) = fip->nfnfields;
11112 /* Returns non-zero if NAME is the name of a vtable member in CU's
11113 language, zero otherwise. */
11115 is_vtable_name (const char *name, struct dwarf2_cu *cu)
11117 static const char vptr[] = "_vptr";
11118 static const char vtable[] = "vtable";
11120 /* Look for the C++ and Java forms of the vtable. */
11121 if ((cu->language == language_java
11122 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
11123 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
11124 && is_cplus_marker (name[sizeof (vptr) - 1])))
11130 /* GCC outputs unnamed structures that are really pointers to member
11131 functions, with the ABI-specified layout. If TYPE describes
11132 such a structure, smash it into a member function type.
11134 GCC shouldn't do this; it should just output pointer to member DIEs.
11135 This is GCC PR debug/28767. */
11138 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
11140 struct type *pfn_type, *domain_type, *new_type;
11142 /* Check for a structure with no name and two children. */
11143 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
11146 /* Check for __pfn and __delta members. */
11147 if (TYPE_FIELD_NAME (type, 0) == NULL
11148 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
11149 || TYPE_FIELD_NAME (type, 1) == NULL
11150 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
11153 /* Find the type of the method. */
11154 pfn_type = TYPE_FIELD_TYPE (type, 0);
11155 if (pfn_type == NULL
11156 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
11157 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
11160 /* Look for the "this" argument. */
11161 pfn_type = TYPE_TARGET_TYPE (pfn_type);
11162 if (TYPE_NFIELDS (pfn_type) == 0
11163 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11164 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
11167 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
11168 new_type = alloc_type (objfile);
11169 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
11170 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
11171 TYPE_VARARGS (pfn_type));
11172 smash_to_methodptr_type (type, new_type);
11175 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11179 producer_is_icc (struct dwarf2_cu *cu)
11181 if (!cu->checked_producer)
11182 check_producer (cu);
11184 return cu->producer_is_icc;
11187 /* Called when we find the DIE that starts a structure or union scope
11188 (definition) to create a type for the structure or union. Fill in
11189 the type's name and general properties; the members will not be
11190 processed until process_structure_type.
11192 NOTE: we need to call these functions regardless of whether or not the
11193 DIE has a DW_AT_name attribute, since it might be an anonymous
11194 structure or union. This gets the type entered into our set of
11195 user defined types.
11197 However, if the structure is incomplete (an opaque struct/union)
11198 then suppress creating a symbol table entry for it since gdb only
11199 wants to find the one with the complete definition. Note that if
11200 it is complete, we just call new_symbol, which does it's own
11201 checking about whether the struct/union is anonymous or not (and
11202 suppresses creating a symbol table entry itself). */
11204 static struct type *
11205 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
11207 struct objfile *objfile = cu->objfile;
11209 struct attribute *attr;
11212 /* If the definition of this type lives in .debug_types, read that type.
11213 Don't follow DW_AT_specification though, that will take us back up
11214 the chain and we want to go down. */
11215 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
11218 struct dwarf2_cu *type_cu = cu;
11219 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11221 /* We could just recurse on read_structure_type, but we need to call
11222 get_die_type to ensure only one type for this DIE is created.
11223 This is important, for example, because for c++ classes we need
11224 TYPE_NAME set which is only done by new_symbol. Blech. */
11225 type = read_type_die (type_die, type_cu);
11227 /* TYPE_CU may not be the same as CU.
11228 Ensure TYPE is recorded in CU's type_hash table. */
11229 return set_die_type (die, type, cu);
11232 type = alloc_type (objfile);
11233 INIT_CPLUS_SPECIFIC (type);
11235 name = dwarf2_name (die, cu);
11238 if (cu->language == language_cplus
11239 || cu->language == language_java)
11241 const char *full_name = dwarf2_full_name (name, die, cu);
11243 /* dwarf2_full_name might have already finished building the DIE's
11244 type. If so, there is no need to continue. */
11245 if (get_die_type (die, cu) != NULL)
11246 return get_die_type (die, cu);
11248 TYPE_TAG_NAME (type) = full_name;
11249 if (die->tag == DW_TAG_structure_type
11250 || die->tag == DW_TAG_class_type)
11251 TYPE_NAME (type) = TYPE_TAG_NAME (type);
11255 /* The name is already allocated along with this objfile, so
11256 we don't need to duplicate it for the type. */
11257 TYPE_TAG_NAME (type) = name;
11258 if (die->tag == DW_TAG_class_type)
11259 TYPE_NAME (type) = TYPE_TAG_NAME (type);
11263 if (die->tag == DW_TAG_structure_type)
11265 TYPE_CODE (type) = TYPE_CODE_STRUCT;
11267 else if (die->tag == DW_TAG_union_type)
11269 TYPE_CODE (type) = TYPE_CODE_UNION;
11273 TYPE_CODE (type) = TYPE_CODE_CLASS;
11276 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
11277 TYPE_DECLARED_CLASS (type) = 1;
11279 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11282 TYPE_LENGTH (type) = DW_UNSND (attr);
11286 TYPE_LENGTH (type) = 0;
11289 if (producer_is_icc (cu))
11291 /* ICC does not output the required DW_AT_declaration
11292 on incomplete types, but gives them a size of zero. */
11295 TYPE_STUB_SUPPORTED (type) = 1;
11297 if (die_is_declaration (die, cu))
11298 TYPE_STUB (type) = 1;
11299 else if (attr == NULL && die->child == NULL
11300 && producer_is_realview (cu->producer))
11301 /* RealView does not output the required DW_AT_declaration
11302 on incomplete types. */
11303 TYPE_STUB (type) = 1;
11305 /* We need to add the type field to the die immediately so we don't
11306 infinitely recurse when dealing with pointers to the structure
11307 type within the structure itself. */
11308 set_die_type (die, type, cu);
11310 /* set_die_type should be already done. */
11311 set_descriptive_type (type, die, cu);
11316 /* Finish creating a structure or union type, including filling in
11317 its members and creating a symbol for it. */
11320 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
11322 struct objfile *objfile = cu->objfile;
11323 struct die_info *child_die = die->child;
11326 type = get_die_type (die, cu);
11328 type = read_structure_type (die, cu);
11330 if (die->child != NULL && ! die_is_declaration (die, cu))
11332 struct field_info fi;
11333 struct die_info *child_die;
11334 VEC (symbolp) *template_args = NULL;
11335 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
11337 memset (&fi, 0, sizeof (struct field_info));
11339 child_die = die->child;
11341 while (child_die && child_die->tag)
11343 if (child_die->tag == DW_TAG_member
11344 || child_die->tag == DW_TAG_variable)
11346 /* NOTE: carlton/2002-11-05: A C++ static data member
11347 should be a DW_TAG_member that is a declaration, but
11348 all versions of G++ as of this writing (so through at
11349 least 3.2.1) incorrectly generate DW_TAG_variable
11350 tags for them instead. */
11351 dwarf2_add_field (&fi, child_die, cu);
11353 else if (child_die->tag == DW_TAG_subprogram)
11355 /* C++ member function. */
11356 dwarf2_add_member_fn (&fi, child_die, type, cu);
11358 else if (child_die->tag == DW_TAG_inheritance)
11360 /* C++ base class field. */
11361 dwarf2_add_field (&fi, child_die, cu);
11363 else if (child_die->tag == DW_TAG_typedef)
11364 dwarf2_add_typedef (&fi, child_die, cu);
11365 else if (child_die->tag == DW_TAG_template_type_param
11366 || child_die->tag == DW_TAG_template_value_param)
11368 struct symbol *arg = new_symbol (child_die, NULL, cu);
11371 VEC_safe_push (symbolp, template_args, arg);
11374 child_die = sibling_die (child_die);
11377 /* Attach template arguments to type. */
11378 if (! VEC_empty (symbolp, template_args))
11380 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11381 TYPE_N_TEMPLATE_ARGUMENTS (type)
11382 = VEC_length (symbolp, template_args);
11383 TYPE_TEMPLATE_ARGUMENTS (type)
11384 = obstack_alloc (&objfile->objfile_obstack,
11385 (TYPE_N_TEMPLATE_ARGUMENTS (type)
11386 * sizeof (struct symbol *)));
11387 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
11388 VEC_address (symbolp, template_args),
11389 (TYPE_N_TEMPLATE_ARGUMENTS (type)
11390 * sizeof (struct symbol *)));
11391 VEC_free (symbolp, template_args);
11394 /* Attach fields and member functions to the type. */
11396 dwarf2_attach_fields_to_type (&fi, type, cu);
11399 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
11401 /* Get the type which refers to the base class (possibly this
11402 class itself) which contains the vtable pointer for the current
11403 class from the DW_AT_containing_type attribute. This use of
11404 DW_AT_containing_type is a GNU extension. */
11406 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
11408 struct type *t = die_containing_type (die, cu);
11410 TYPE_VPTR_BASETYPE (type) = t;
11415 /* Our own class provides vtbl ptr. */
11416 for (i = TYPE_NFIELDS (t) - 1;
11417 i >= TYPE_N_BASECLASSES (t);
11420 const char *fieldname = TYPE_FIELD_NAME (t, i);
11422 if (is_vtable_name (fieldname, cu))
11424 TYPE_VPTR_FIELDNO (type) = i;
11429 /* Complain if virtual function table field not found. */
11430 if (i < TYPE_N_BASECLASSES (t))
11431 complaint (&symfile_complaints,
11432 _("virtual function table pointer "
11433 "not found when defining class '%s'"),
11434 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
11439 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
11442 else if (cu->producer
11443 && strncmp (cu->producer,
11444 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11446 /* The IBM XLC compiler does not provide direct indication
11447 of the containing type, but the vtable pointer is
11448 always named __vfp. */
11452 for (i = TYPE_NFIELDS (type) - 1;
11453 i >= TYPE_N_BASECLASSES (type);
11456 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
11458 TYPE_VPTR_FIELDNO (type) = i;
11459 TYPE_VPTR_BASETYPE (type) = type;
11466 /* Copy fi.typedef_field_list linked list elements content into the
11467 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11468 if (fi.typedef_field_list)
11470 int i = fi.typedef_field_list_count;
11472 ALLOCATE_CPLUS_STRUCT_TYPE (type);
11473 TYPE_TYPEDEF_FIELD_ARRAY (type)
11474 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
11475 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
11477 /* Reverse the list order to keep the debug info elements order. */
11480 struct typedef_field *dest, *src;
11482 dest = &TYPE_TYPEDEF_FIELD (type, i);
11483 src = &fi.typedef_field_list->field;
11484 fi.typedef_field_list = fi.typedef_field_list->next;
11489 do_cleanups (back_to);
11491 if (HAVE_CPLUS_STRUCT (type))
11492 TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java;
11495 quirk_gcc_member_function_pointer (type, objfile);
11497 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11498 snapshots) has been known to create a die giving a declaration
11499 for a class that has, as a child, a die giving a definition for a
11500 nested class. So we have to process our children even if the
11501 current die is a declaration. Normally, of course, a declaration
11502 won't have any children at all. */
11504 while (child_die != NULL && child_die->tag)
11506 if (child_die->tag == DW_TAG_member
11507 || child_die->tag == DW_TAG_variable
11508 || child_die->tag == DW_TAG_inheritance
11509 || child_die->tag == DW_TAG_template_value_param
11510 || child_die->tag == DW_TAG_template_type_param)
11515 process_die (child_die, cu);
11517 child_die = sibling_die (child_die);
11520 /* Do not consider external references. According to the DWARF standard,
11521 these DIEs are identified by the fact that they have no byte_size
11522 attribute, and a declaration attribute. */
11523 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
11524 || !die_is_declaration (die, cu))
11525 new_symbol (die, type, cu);
11528 /* Given a DW_AT_enumeration_type die, set its type. We do not
11529 complete the type's fields yet, or create any symbols. */
11531 static struct type *
11532 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
11534 struct objfile *objfile = cu->objfile;
11536 struct attribute *attr;
11539 /* If the definition of this type lives in .debug_types, read that type.
11540 Don't follow DW_AT_specification though, that will take us back up
11541 the chain and we want to go down. */
11542 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
11545 struct dwarf2_cu *type_cu = cu;
11546 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
11548 type = read_type_die (type_die, type_cu);
11550 /* TYPE_CU may not be the same as CU.
11551 Ensure TYPE is recorded in CU's type_hash table. */
11552 return set_die_type (die, type, cu);
11555 type = alloc_type (objfile);
11557 TYPE_CODE (type) = TYPE_CODE_ENUM;
11558 name = dwarf2_full_name (NULL, die, cu);
11560 TYPE_TAG_NAME (type) = name;
11562 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11565 TYPE_LENGTH (type) = DW_UNSND (attr);
11569 TYPE_LENGTH (type) = 0;
11572 /* The enumeration DIE can be incomplete. In Ada, any type can be
11573 declared as private in the package spec, and then defined only
11574 inside the package body. Such types are known as Taft Amendment
11575 Types. When another package uses such a type, an incomplete DIE
11576 may be generated by the compiler. */
11577 if (die_is_declaration (die, cu))
11578 TYPE_STUB (type) = 1;
11580 return set_die_type (die, type, cu);
11583 /* Given a pointer to a die which begins an enumeration, process all
11584 the dies that define the members of the enumeration, and create the
11585 symbol for the enumeration type.
11587 NOTE: We reverse the order of the element list. */
11590 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
11592 struct type *this_type;
11594 this_type = get_die_type (die, cu);
11595 if (this_type == NULL)
11596 this_type = read_enumeration_type (die, cu);
11598 if (die->child != NULL)
11600 struct die_info *child_die;
11601 struct symbol *sym;
11602 struct field *fields = NULL;
11603 int num_fields = 0;
11604 int unsigned_enum = 1;
11609 child_die = die->child;
11610 while (child_die && child_die->tag)
11612 if (child_die->tag != DW_TAG_enumerator)
11614 process_die (child_die, cu);
11618 name = dwarf2_name (child_die, cu);
11621 sym = new_symbol (child_die, this_type, cu);
11622 if (SYMBOL_VALUE (sym) < 0)
11627 else if ((mask & SYMBOL_VALUE (sym)) != 0)
11630 mask |= SYMBOL_VALUE (sym);
11632 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
11634 fields = (struct field *)
11636 (num_fields + DW_FIELD_ALLOC_CHUNK)
11637 * sizeof (struct field));
11640 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
11641 FIELD_TYPE (fields[num_fields]) = NULL;
11642 SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym));
11643 FIELD_BITSIZE (fields[num_fields]) = 0;
11649 child_die = sibling_die (child_die);
11654 TYPE_NFIELDS (this_type) = num_fields;
11655 TYPE_FIELDS (this_type) = (struct field *)
11656 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
11657 memcpy (TYPE_FIELDS (this_type), fields,
11658 sizeof (struct field) * num_fields);
11662 TYPE_UNSIGNED (this_type) = 1;
11664 TYPE_FLAG_ENUM (this_type) = 1;
11667 /* If we are reading an enum from a .debug_types unit, and the enum
11668 is a declaration, and the enum is not the signatured type in the
11669 unit, then we do not want to add a symbol for it. Adding a
11670 symbol would in some cases obscure the true definition of the
11671 enum, giving users an incomplete type when the definition is
11672 actually available. Note that we do not want to do this for all
11673 enums which are just declarations, because C++0x allows forward
11674 enum declarations. */
11675 if (cu->per_cu->is_debug_types
11676 && die_is_declaration (die, cu))
11678 struct signatured_type *sig_type;
11681 = lookup_signatured_type_at_offset (dwarf2_per_objfile->objfile,
11682 cu->per_cu->info_or_types_section,
11683 cu->per_cu->offset);
11684 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
11685 if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off)
11689 new_symbol (die, this_type, cu);
11692 /* Extract all information from a DW_TAG_array_type DIE and put it in
11693 the DIE's type field. For now, this only handles one dimensional
11696 static struct type *
11697 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
11699 struct objfile *objfile = cu->objfile;
11700 struct die_info *child_die;
11702 struct type *element_type, *range_type, *index_type;
11703 struct type **range_types = NULL;
11704 struct attribute *attr;
11706 struct cleanup *back_to;
11709 element_type = die_type (die, cu);
11711 /* The die_type call above may have already set the type for this DIE. */
11712 type = get_die_type (die, cu);
11716 /* Irix 6.2 native cc creates array types without children for
11717 arrays with unspecified length. */
11718 if (die->child == NULL)
11720 index_type = objfile_type (objfile)->builtin_int;
11721 range_type = create_range_type (NULL, index_type, 0, -1);
11722 type = create_array_type (NULL, element_type, range_type);
11723 return set_die_type (die, type, cu);
11726 back_to = make_cleanup (null_cleanup, NULL);
11727 child_die = die->child;
11728 while (child_die && child_die->tag)
11730 if (child_die->tag == DW_TAG_subrange_type)
11732 struct type *child_type = read_type_die (child_die, cu);
11734 if (child_type != NULL)
11736 /* The range type was succesfully read. Save it for the
11737 array type creation. */
11738 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
11740 range_types = (struct type **)
11741 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
11742 * sizeof (struct type *));
11744 make_cleanup (free_current_contents, &range_types);
11746 range_types[ndim++] = child_type;
11749 child_die = sibling_die (child_die);
11752 /* Dwarf2 dimensions are output from left to right, create the
11753 necessary array types in backwards order. */
11755 type = element_type;
11757 if (read_array_order (die, cu) == DW_ORD_col_major)
11762 type = create_array_type (NULL, type, range_types[i++]);
11767 type = create_array_type (NULL, type, range_types[ndim]);
11770 /* Understand Dwarf2 support for vector types (like they occur on
11771 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11772 array type. This is not part of the Dwarf2/3 standard yet, but a
11773 custom vendor extension. The main difference between a regular
11774 array and the vector variant is that vectors are passed by value
11776 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
11778 make_vector_type (type);
11780 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11781 implementation may choose to implement triple vectors using this
11783 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11786 if (DW_UNSND (attr) >= TYPE_LENGTH (type))
11787 TYPE_LENGTH (type) = DW_UNSND (attr);
11789 complaint (&symfile_complaints,
11790 _("DW_AT_byte_size for array type smaller "
11791 "than the total size of elements"));
11794 name = dwarf2_name (die, cu);
11796 TYPE_NAME (type) = name;
11798 /* Install the type in the die. */
11799 set_die_type (die, type, cu);
11801 /* set_die_type should be already done. */
11802 set_descriptive_type (type, die, cu);
11804 do_cleanups (back_to);
11809 static enum dwarf_array_dim_ordering
11810 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
11812 struct attribute *attr;
11814 attr = dwarf2_attr (die, DW_AT_ordering, cu);
11816 if (attr) return DW_SND (attr);
11818 /* GNU F77 is a special case, as at 08/2004 array type info is the
11819 opposite order to the dwarf2 specification, but data is still
11820 laid out as per normal fortran.
11822 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11823 version checking. */
11825 if (cu->language == language_fortran
11826 && cu->producer && strstr (cu->producer, "GNU F77"))
11828 return DW_ORD_row_major;
11831 switch (cu->language_defn->la_array_ordering)
11833 case array_column_major:
11834 return DW_ORD_col_major;
11835 case array_row_major:
11837 return DW_ORD_row_major;
11841 /* Extract all information from a DW_TAG_set_type DIE and put it in
11842 the DIE's type field. */
11844 static struct type *
11845 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
11847 struct type *domain_type, *set_type;
11848 struct attribute *attr;
11850 domain_type = die_type (die, cu);
11852 /* The die_type call above may have already set the type for this DIE. */
11853 set_type = get_die_type (die, cu);
11857 set_type = create_set_type (NULL, domain_type);
11859 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11861 TYPE_LENGTH (set_type) = DW_UNSND (attr);
11863 return set_die_type (die, set_type, cu);
11866 /* A helper for read_common_block that creates a locexpr baton.
11867 SYM is the symbol which we are marking as computed.
11868 COMMON_DIE is the DIE for the common block.
11869 COMMON_LOC is the location expression attribute for the common
11871 MEMBER_LOC is the location expression attribute for the particular
11872 member of the common block that we are processing.
11873 CU is the CU from which the above come. */
11876 mark_common_block_symbol_computed (struct symbol *sym,
11877 struct die_info *common_die,
11878 struct attribute *common_loc,
11879 struct attribute *member_loc,
11880 struct dwarf2_cu *cu)
11882 struct objfile *objfile = dwarf2_per_objfile->objfile;
11883 struct dwarf2_locexpr_baton *baton;
11885 unsigned int cu_off;
11886 enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile));
11887 LONGEST offset = 0;
11889 gdb_assert (common_loc && member_loc);
11890 gdb_assert (attr_form_is_block (common_loc));
11891 gdb_assert (attr_form_is_block (member_loc)
11892 || attr_form_is_constant (member_loc));
11894 baton = obstack_alloc (&objfile->objfile_obstack,
11895 sizeof (struct dwarf2_locexpr_baton));
11896 baton->per_cu = cu->per_cu;
11897 gdb_assert (baton->per_cu);
11899 baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11901 if (attr_form_is_constant (member_loc))
11903 offset = dwarf2_get_attr_constant_value (member_loc, 0);
11904 baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size;
11907 baton->size += DW_BLOCK (member_loc)->size;
11909 ptr = obstack_alloc (&objfile->objfile_obstack, baton->size);
11912 *ptr++ = DW_OP_call4;
11913 cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off;
11914 store_unsigned_integer (ptr, 4, byte_order, cu_off);
11917 if (attr_form_is_constant (member_loc))
11919 *ptr++ = DW_OP_addr;
11920 store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset);
11921 ptr += cu->header.addr_size;
11925 /* We have to copy the data here, because DW_OP_call4 will only
11926 use a DW_AT_location attribute. */
11927 memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size);
11928 ptr += DW_BLOCK (member_loc)->size;
11931 *ptr++ = DW_OP_plus;
11932 gdb_assert (ptr - baton->data == baton->size);
11934 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
11935 SYMBOL_LOCATION_BATON (sym) = baton;
11936 SYMBOL_CLASS (sym) = LOC_COMPUTED;
11939 /* Create appropriate locally-scoped variables for all the
11940 DW_TAG_common_block entries. Also create a struct common_block
11941 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11942 is used to sepate the common blocks name namespace from regular
11946 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
11948 struct attribute *attr;
11950 attr = dwarf2_attr (die, DW_AT_location, cu);
11953 /* Support the .debug_loc offsets. */
11954 if (attr_form_is_block (attr))
11958 else if (attr_form_is_section_offset (attr))
11960 dwarf2_complex_location_expr_complaint ();
11965 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11966 "common block member");
11971 if (die->child != NULL)
11973 struct objfile *objfile = cu->objfile;
11974 struct die_info *child_die;
11975 size_t n_entries = 0, size;
11976 struct common_block *common_block;
11977 struct symbol *sym;
11979 for (child_die = die->child;
11980 child_die && child_die->tag;
11981 child_die = sibling_die (child_die))
11984 size = (sizeof (struct common_block)
11985 + (n_entries - 1) * sizeof (struct symbol *));
11986 common_block = obstack_alloc (&objfile->objfile_obstack, size);
11987 memset (common_block->contents, 0, n_entries * sizeof (struct symbol *));
11988 common_block->n_entries = 0;
11990 for (child_die = die->child;
11991 child_die && child_die->tag;
11992 child_die = sibling_die (child_die))
11994 /* Create the symbol in the DW_TAG_common_block block in the current
11996 sym = new_symbol (child_die, NULL, cu);
11999 struct attribute *member_loc;
12001 common_block->contents[common_block->n_entries++] = sym;
12003 member_loc = dwarf2_attr (child_die, DW_AT_data_member_location,
12007 /* GDB has handled this for a long time, but it is
12008 not specified by DWARF. It seems to have been
12009 emitted by gfortran at least as recently as:
12010 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
12011 complaint (&symfile_complaints,
12012 _("Variable in common block has "
12013 "DW_AT_data_member_location "
12014 "- DIE at 0x%x [in module %s]"),
12015 child_die->offset.sect_off, cu->objfile->name);
12017 if (attr_form_is_section_offset (member_loc))
12018 dwarf2_complex_location_expr_complaint ();
12019 else if (attr_form_is_constant (member_loc)
12020 || attr_form_is_block (member_loc))
12023 mark_common_block_symbol_computed (sym, die, attr,
12027 dwarf2_complex_location_expr_complaint ();
12032 sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu);
12033 SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block;
12037 /* Create a type for a C++ namespace. */
12039 static struct type *
12040 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
12042 struct objfile *objfile = cu->objfile;
12043 const char *previous_prefix, *name;
12047 /* For extensions, reuse the type of the original namespace. */
12048 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
12050 struct die_info *ext_die;
12051 struct dwarf2_cu *ext_cu = cu;
12053 ext_die = dwarf2_extension (die, &ext_cu);
12054 type = read_type_die (ext_die, ext_cu);
12056 /* EXT_CU may not be the same as CU.
12057 Ensure TYPE is recorded in CU's type_hash table. */
12058 return set_die_type (die, type, cu);
12061 name = namespace_name (die, &is_anonymous, cu);
12063 /* Now build the name of the current namespace. */
12065 previous_prefix = determine_prefix (die, cu);
12066 if (previous_prefix[0] != '\0')
12067 name = typename_concat (&objfile->objfile_obstack,
12068 previous_prefix, name, 0, cu);
12070 /* Create the type. */
12071 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
12073 TYPE_NAME (type) = name;
12074 TYPE_TAG_NAME (type) = TYPE_NAME (type);
12076 return set_die_type (die, type, cu);
12079 /* Read a C++ namespace. */
12082 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
12084 struct objfile *objfile = cu->objfile;
12087 /* Add a symbol associated to this if we haven't seen the namespace
12088 before. Also, add a using directive if it's an anonymous
12091 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
12095 type = read_type_die (die, cu);
12096 new_symbol (die, type, cu);
12098 namespace_name (die, &is_anonymous, cu);
12101 const char *previous_prefix = determine_prefix (die, cu);
12103 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
12104 NULL, NULL, 0, &objfile->objfile_obstack);
12108 if (die->child != NULL)
12110 struct die_info *child_die = die->child;
12112 while (child_die && child_die->tag)
12114 process_die (child_die, cu);
12115 child_die = sibling_die (child_die);
12120 /* Read a Fortran module as type. This DIE can be only a declaration used for
12121 imported module. Still we need that type as local Fortran "use ... only"
12122 declaration imports depend on the created type in determine_prefix. */
12124 static struct type *
12125 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
12127 struct objfile *objfile = cu->objfile;
12128 const char *module_name;
12131 module_name = dwarf2_name (die, cu);
12133 complaint (&symfile_complaints,
12134 _("DW_TAG_module has no name, offset 0x%x"),
12135 die->offset.sect_off);
12136 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
12138 /* determine_prefix uses TYPE_TAG_NAME. */
12139 TYPE_TAG_NAME (type) = TYPE_NAME (type);
12141 return set_die_type (die, type, cu);
12144 /* Read a Fortran module. */
12147 read_module (struct die_info *die, struct dwarf2_cu *cu)
12149 struct die_info *child_die = die->child;
12151 while (child_die && child_die->tag)
12153 process_die (child_die, cu);
12154 child_die = sibling_die (child_die);
12158 /* Return the name of the namespace represented by DIE. Set
12159 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12162 static const char *
12163 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
12165 struct die_info *current_die;
12166 const char *name = NULL;
12168 /* Loop through the extensions until we find a name. */
12170 for (current_die = die;
12171 current_die != NULL;
12172 current_die = dwarf2_extension (die, &cu))
12174 name = dwarf2_name (current_die, cu);
12179 /* Is it an anonymous namespace? */
12181 *is_anonymous = (name == NULL);
12183 name = CP_ANONYMOUS_NAMESPACE_STR;
12188 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12189 the user defined type vector. */
12191 static struct type *
12192 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
12194 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
12195 struct comp_unit_head *cu_header = &cu->header;
12197 struct attribute *attr_byte_size;
12198 struct attribute *attr_address_class;
12199 int byte_size, addr_class;
12200 struct type *target_type;
12202 target_type = die_type (die, cu);
12204 /* The die_type call above may have already set the type for this DIE. */
12205 type = get_die_type (die, cu);
12209 type = lookup_pointer_type (target_type);
12211 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
12212 if (attr_byte_size)
12213 byte_size = DW_UNSND (attr_byte_size);
12215 byte_size = cu_header->addr_size;
12217 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
12218 if (attr_address_class)
12219 addr_class = DW_UNSND (attr_address_class);
12221 addr_class = DW_ADDR_none;
12223 /* If the pointer size or address class is different than the
12224 default, create a type variant marked as such and set the
12225 length accordingly. */
12226 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
12228 if (gdbarch_address_class_type_flags_p (gdbarch))
12232 type_flags = gdbarch_address_class_type_flags
12233 (gdbarch, byte_size, addr_class);
12234 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
12236 type = make_type_with_address_space (type, type_flags);
12238 else if (TYPE_LENGTH (type) != byte_size)
12240 complaint (&symfile_complaints,
12241 _("invalid pointer size %d"), byte_size);
12245 /* Should we also complain about unhandled address classes? */
12249 TYPE_LENGTH (type) = byte_size;
12250 return set_die_type (die, type, cu);
12253 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12254 the user defined type vector. */
12256 static struct type *
12257 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
12260 struct type *to_type;
12261 struct type *domain;
12263 to_type = die_type (die, cu);
12264 domain = die_containing_type (die, cu);
12266 /* The calls above may have already set the type for this DIE. */
12267 type = get_die_type (die, cu);
12271 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
12272 type = lookup_methodptr_type (to_type);
12273 else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC)
12275 struct type *new_type = alloc_type (cu->objfile);
12277 smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type),
12278 TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type),
12279 TYPE_VARARGS (to_type));
12280 type = lookup_methodptr_type (new_type);
12283 type = lookup_memberptr_type (to_type, domain);
12285 return set_die_type (die, type, cu);
12288 /* Extract all information from a DW_TAG_reference_type DIE and add to
12289 the user defined type vector. */
12291 static struct type *
12292 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
12294 struct comp_unit_head *cu_header = &cu->header;
12295 struct type *type, *target_type;
12296 struct attribute *attr;
12298 target_type = die_type (die, cu);
12300 /* The die_type call above may have already set the type for this DIE. */
12301 type = get_die_type (die, cu);
12305 type = lookup_reference_type (target_type);
12306 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12309 TYPE_LENGTH (type) = DW_UNSND (attr);
12313 TYPE_LENGTH (type) = cu_header->addr_size;
12315 return set_die_type (die, type, cu);
12318 static struct type *
12319 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
12321 struct type *base_type, *cv_type;
12323 base_type = die_type (die, cu);
12325 /* The die_type call above may have already set the type for this DIE. */
12326 cv_type = get_die_type (die, cu);
12330 /* In case the const qualifier is applied to an array type, the element type
12331 is so qualified, not the array type (section 6.7.3 of C99). */
12332 if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY)
12334 struct type *el_type, *inner_array;
12336 base_type = copy_type (base_type);
12337 inner_array = base_type;
12339 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
12341 TYPE_TARGET_TYPE (inner_array) =
12342 copy_type (TYPE_TARGET_TYPE (inner_array));
12343 inner_array = TYPE_TARGET_TYPE (inner_array);
12346 el_type = TYPE_TARGET_TYPE (inner_array);
12347 TYPE_TARGET_TYPE (inner_array) =
12348 make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL);
12350 return set_die_type (die, base_type, cu);
12353 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
12354 return set_die_type (die, cv_type, cu);
12357 static struct type *
12358 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
12360 struct type *base_type, *cv_type;
12362 base_type = die_type (die, cu);
12364 /* The die_type call above may have already set the type for this DIE. */
12365 cv_type = get_die_type (die, cu);
12369 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
12370 return set_die_type (die, cv_type, cu);
12373 /* Handle DW_TAG_restrict_type. */
12375 static struct type *
12376 read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu)
12378 struct type *base_type, *cv_type;
12380 base_type = die_type (die, cu);
12382 /* The die_type call above may have already set the type for this DIE. */
12383 cv_type = get_die_type (die, cu);
12387 cv_type = make_restrict_type (base_type);
12388 return set_die_type (die, cv_type, cu);
12391 /* Extract all information from a DW_TAG_string_type DIE and add to
12392 the user defined type vector. It isn't really a user defined type,
12393 but it behaves like one, with other DIE's using an AT_user_def_type
12394 attribute to reference it. */
12396 static struct type *
12397 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
12399 struct objfile *objfile = cu->objfile;
12400 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12401 struct type *type, *range_type, *index_type, *char_type;
12402 struct attribute *attr;
12403 unsigned int length;
12405 attr = dwarf2_attr (die, DW_AT_string_length, cu);
12408 length = DW_UNSND (attr);
12412 /* Check for the DW_AT_byte_size attribute. */
12413 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12416 length = DW_UNSND (attr);
12424 index_type = objfile_type (objfile)->builtin_int;
12425 range_type = create_range_type (NULL, index_type, 1, length);
12426 char_type = language_string_char_type (cu->language_defn, gdbarch);
12427 type = create_string_type (NULL, char_type, range_type);
12429 return set_die_type (die, type, cu);
12432 /* Handle DIES due to C code like:
12436 int (*funcp)(int a, long l);
12440 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12442 static struct type *
12443 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
12445 struct objfile *objfile = cu->objfile;
12446 struct type *type; /* Type that this function returns. */
12447 struct type *ftype; /* Function that returns above type. */
12448 struct attribute *attr;
12450 type = die_type (die, cu);
12452 /* The die_type call above may have already set the type for this DIE. */
12453 ftype = get_die_type (die, cu);
12457 ftype = lookup_function_type (type);
12459 /* All functions in C++, Pascal and Java have prototypes. */
12460 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
12461 if ((attr && (DW_UNSND (attr) != 0))
12462 || cu->language == language_cplus
12463 || cu->language == language_java
12464 || cu->language == language_pascal)
12465 TYPE_PROTOTYPED (ftype) = 1;
12466 else if (producer_is_realview (cu->producer))
12467 /* RealView does not emit DW_AT_prototyped. We can not
12468 distinguish prototyped and unprototyped functions; default to
12469 prototyped, since that is more common in modern code (and
12470 RealView warns about unprototyped functions). */
12471 TYPE_PROTOTYPED (ftype) = 1;
12473 /* Store the calling convention in the type if it's available in
12474 the subroutine die. Otherwise set the calling convention to
12475 the default value DW_CC_normal. */
12476 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
12478 TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr);
12479 else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL"))
12480 TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL;
12482 TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal;
12484 /* We need to add the subroutine type to the die immediately so
12485 we don't infinitely recurse when dealing with parameters
12486 declared as the same subroutine type. */
12487 set_die_type (die, ftype, cu);
12489 if (die->child != NULL)
12491 struct type *void_type = objfile_type (objfile)->builtin_void;
12492 struct die_info *child_die;
12493 int nparams, iparams;
12495 /* Count the number of parameters.
12496 FIXME: GDB currently ignores vararg functions, but knows about
12497 vararg member functions. */
12499 child_die = die->child;
12500 while (child_die && child_die->tag)
12502 if (child_die->tag == DW_TAG_formal_parameter)
12504 else if (child_die->tag == DW_TAG_unspecified_parameters)
12505 TYPE_VARARGS (ftype) = 1;
12506 child_die = sibling_die (child_die);
12509 /* Allocate storage for parameters and fill them in. */
12510 TYPE_NFIELDS (ftype) = nparams;
12511 TYPE_FIELDS (ftype) = (struct field *)
12512 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
12514 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12515 even if we error out during the parameters reading below. */
12516 for (iparams = 0; iparams < nparams; iparams++)
12517 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
12520 child_die = die->child;
12521 while (child_die && child_die->tag)
12523 if (child_die->tag == DW_TAG_formal_parameter)
12525 struct type *arg_type;
12527 /* DWARF version 2 has no clean way to discern C++
12528 static and non-static member functions. G++ helps
12529 GDB by marking the first parameter for non-static
12530 member functions (which is the this pointer) as
12531 artificial. We pass this information to
12532 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12534 DWARF version 3 added DW_AT_object_pointer, which GCC
12535 4.5 does not yet generate. */
12536 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
12538 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
12541 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
12543 /* GCC/43521: In java, the formal parameter
12544 "this" is sometimes not marked with DW_AT_artificial. */
12545 if (cu->language == language_java)
12547 const char *name = dwarf2_name (child_die, cu);
12549 if (name && !strcmp (name, "this"))
12550 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
12553 arg_type = die_type (child_die, cu);
12555 /* RealView does not mark THIS as const, which the testsuite
12556 expects. GCC marks THIS as const in method definitions,
12557 but not in the class specifications (GCC PR 43053). */
12558 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
12559 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
12562 struct dwarf2_cu *arg_cu = cu;
12563 const char *name = dwarf2_name (child_die, cu);
12565 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
12568 /* If the compiler emits this, use it. */
12569 if (follow_die_ref (die, attr, &arg_cu) == child_die)
12572 else if (name && strcmp (name, "this") == 0)
12573 /* Function definitions will have the argument names. */
12575 else if (name == NULL && iparams == 0)
12576 /* Declarations may not have the names, so like
12577 elsewhere in GDB, assume an artificial first
12578 argument is "this". */
12582 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
12586 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
12589 child_die = sibling_die (child_die);
12596 static struct type *
12597 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
12599 struct objfile *objfile = cu->objfile;
12600 const char *name = NULL;
12601 struct type *this_type, *target_type;
12603 name = dwarf2_full_name (NULL, die, cu);
12604 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
12605 TYPE_FLAG_TARGET_STUB, NULL, objfile);
12606 TYPE_NAME (this_type) = name;
12607 set_die_type (die, this_type, cu);
12608 target_type = die_type (die, cu);
12609 if (target_type != this_type)
12610 TYPE_TARGET_TYPE (this_type) = target_type;
12613 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12614 spec and cause infinite loops in GDB. */
12615 complaint (&symfile_complaints,
12616 _("Self-referential DW_TAG_typedef "
12617 "- DIE at 0x%x [in module %s]"),
12618 die->offset.sect_off, objfile->name);
12619 TYPE_TARGET_TYPE (this_type) = NULL;
12624 /* Find a representation of a given base type and install
12625 it in the TYPE field of the die. */
12627 static struct type *
12628 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
12630 struct objfile *objfile = cu->objfile;
12632 struct attribute *attr;
12633 int encoding = 0, size = 0;
12635 enum type_code code = TYPE_CODE_INT;
12636 int type_flags = 0;
12637 struct type *target_type = NULL;
12639 attr = dwarf2_attr (die, DW_AT_encoding, cu);
12642 encoding = DW_UNSND (attr);
12644 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12647 size = DW_UNSND (attr);
12649 name = dwarf2_name (die, cu);
12652 complaint (&symfile_complaints,
12653 _("DW_AT_name missing from DW_TAG_base_type"));
12658 case DW_ATE_address:
12659 /* Turn DW_ATE_address into a void * pointer. */
12660 code = TYPE_CODE_PTR;
12661 type_flags |= TYPE_FLAG_UNSIGNED;
12662 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
12664 case DW_ATE_boolean:
12665 code = TYPE_CODE_BOOL;
12666 type_flags |= TYPE_FLAG_UNSIGNED;
12668 case DW_ATE_complex_float:
12669 code = TYPE_CODE_COMPLEX;
12670 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
12672 case DW_ATE_decimal_float:
12673 code = TYPE_CODE_DECFLOAT;
12676 code = TYPE_CODE_FLT;
12678 case DW_ATE_signed:
12680 case DW_ATE_unsigned:
12681 type_flags |= TYPE_FLAG_UNSIGNED;
12682 if (cu->language == language_fortran
12684 && strncmp (name, "character(", sizeof ("character(") - 1) == 0)
12685 code = TYPE_CODE_CHAR;
12687 case DW_ATE_signed_char:
12688 if (cu->language == language_ada || cu->language == language_m2
12689 || cu->language == language_pascal
12690 || cu->language == language_fortran)
12691 code = TYPE_CODE_CHAR;
12693 case DW_ATE_unsigned_char:
12694 if (cu->language == language_ada || cu->language == language_m2
12695 || cu->language == language_pascal
12696 || cu->language == language_fortran)
12697 code = TYPE_CODE_CHAR;
12698 type_flags |= TYPE_FLAG_UNSIGNED;
12701 /* We just treat this as an integer and then recognize the
12702 type by name elsewhere. */
12706 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
12707 dwarf_type_encoding_name (encoding));
12711 type = init_type (code, size, type_flags, NULL, objfile);
12712 TYPE_NAME (type) = name;
12713 TYPE_TARGET_TYPE (type) = target_type;
12715 if (name && strcmp (name, "char") == 0)
12716 TYPE_NOSIGN (type) = 1;
12718 return set_die_type (die, type, cu);
12721 /* Read the given DW_AT_subrange DIE. */
12723 static struct type *
12724 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
12726 struct type *base_type;
12727 struct type *range_type;
12728 struct attribute *attr;
12730 int low_default_is_valid;
12732 LONGEST negative_mask;
12734 base_type = die_type (die, cu);
12735 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
12736 check_typedef (base_type);
12738 /* The die_type call above may have already set the type for this DIE. */
12739 range_type = get_die_type (die, cu);
12743 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12744 omitting DW_AT_lower_bound. */
12745 switch (cu->language)
12748 case language_cplus:
12750 low_default_is_valid = 1;
12752 case language_fortran:
12754 low_default_is_valid = 1;
12757 case language_java:
12758 case language_objc:
12760 low_default_is_valid = (cu->header.version >= 4);
12764 case language_pascal:
12766 low_default_is_valid = (cu->header.version >= 4);
12770 low_default_is_valid = 0;
12774 /* FIXME: For variable sized arrays either of these could be
12775 a variable rather than a constant value. We'll allow it,
12776 but we don't know how to handle it. */
12777 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
12779 low = dwarf2_get_attr_constant_value (attr, low);
12780 else if (!low_default_is_valid)
12781 complaint (&symfile_complaints, _("Missing DW_AT_lower_bound "
12782 "- DIE at 0x%x [in module %s]"),
12783 die->offset.sect_off, cu->objfile->name);
12785 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
12788 if (attr_form_is_block (attr) || is_ref_attr (attr))
12790 /* GCC encodes arrays with unspecified or dynamic length
12791 with a DW_FORM_block1 attribute or a reference attribute.
12792 FIXME: GDB does not yet know how to handle dynamic
12793 arrays properly, treat them as arrays with unspecified
12796 FIXME: jimb/2003-09-22: GDB does not really know
12797 how to handle arrays of unspecified length
12798 either; we just represent them as zero-length
12799 arrays. Choose an appropriate upper bound given
12800 the lower bound we've computed above. */
12804 high = dwarf2_get_attr_constant_value (attr, 1);
12808 attr = dwarf2_attr (die, DW_AT_count, cu);
12811 int count = dwarf2_get_attr_constant_value (attr, 1);
12812 high = low + count - 1;
12816 /* Unspecified array length. */
12821 /* Dwarf-2 specifications explicitly allows to create subrange types
12822 without specifying a base type.
12823 In that case, the base type must be set to the type of
12824 the lower bound, upper bound or count, in that order, if any of these
12825 three attributes references an object that has a type.
12826 If no base type is found, the Dwarf-2 specifications say that
12827 a signed integer type of size equal to the size of an address should
12829 For the following C code: `extern char gdb_int [];'
12830 GCC produces an empty range DIE.
12831 FIXME: muller/2010-05-28: Possible references to object for low bound,
12832 high bound or count are not yet handled by this code. */
12833 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
12835 struct objfile *objfile = cu->objfile;
12836 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12837 int addr_size = gdbarch_addr_bit (gdbarch) /8;
12838 struct type *int_type = objfile_type (objfile)->builtin_int;
12840 /* Test "int", "long int", and "long long int" objfile types,
12841 and select the first one having a size above or equal to the
12842 architecture address size. */
12843 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
12844 base_type = int_type;
12847 int_type = objfile_type (objfile)->builtin_long;
12848 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
12849 base_type = int_type;
12852 int_type = objfile_type (objfile)->builtin_long_long;
12853 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
12854 base_type = int_type;
12860 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
12861 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
12862 low |= negative_mask;
12863 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
12864 high |= negative_mask;
12866 range_type = create_range_type (NULL, base_type, low, high);
12868 /* Mark arrays with dynamic length at least as an array of unspecified
12869 length. GDB could check the boundary but before it gets implemented at
12870 least allow accessing the array elements. */
12871 if (attr && attr_form_is_block (attr))
12872 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
12874 /* Ada expects an empty array on no boundary attributes. */
12875 if (attr == NULL && cu->language != language_ada)
12876 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
12878 name = dwarf2_name (die, cu);
12880 TYPE_NAME (range_type) = name;
12882 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
12884 TYPE_LENGTH (range_type) = DW_UNSND (attr);
12886 set_die_type (die, range_type, cu);
12888 /* set_die_type should be already done. */
12889 set_descriptive_type (range_type, die, cu);
12894 static struct type *
12895 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
12899 /* For now, we only support the C meaning of an unspecified type: void. */
12901 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
12902 TYPE_NAME (type) = dwarf2_name (die, cu);
12904 return set_die_type (die, type, cu);
12907 /* Read a single die and all its descendents. Set the die's sibling
12908 field to NULL; set other fields in the die correctly, and set all
12909 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12910 location of the info_ptr after reading all of those dies. PARENT
12911 is the parent of the die in question. */
12913 static struct die_info *
12914 read_die_and_children (const struct die_reader_specs *reader,
12915 gdb_byte *info_ptr,
12916 gdb_byte **new_info_ptr,
12917 struct die_info *parent)
12919 struct die_info *die;
12923 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
12926 *new_info_ptr = cur_ptr;
12929 store_in_ref_table (die, reader->cu);
12932 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
12936 *new_info_ptr = cur_ptr;
12939 die->sibling = NULL;
12940 die->parent = parent;
12944 /* Read a die, all of its descendents, and all of its siblings; set
12945 all of the fields of all of the dies correctly. Arguments are as
12946 in read_die_and_children. */
12948 static struct die_info *
12949 read_die_and_siblings (const struct die_reader_specs *reader,
12950 gdb_byte *info_ptr,
12951 gdb_byte **new_info_ptr,
12952 struct die_info *parent)
12954 struct die_info *first_die, *last_sibling;
12957 cur_ptr = info_ptr;
12958 first_die = last_sibling = NULL;
12962 struct die_info *die
12963 = read_die_and_children (reader, cur_ptr, &cur_ptr, parent);
12967 *new_info_ptr = cur_ptr;
12974 last_sibling->sibling = die;
12976 last_sibling = die;
12980 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12982 The caller is responsible for filling in the extra attributes
12983 and updating (*DIEP)->num_attrs.
12984 Set DIEP to point to a newly allocated die with its information,
12985 except for its child, sibling, and parent fields.
12986 Set HAS_CHILDREN to tell whether the die has children or not. */
12989 read_full_die_1 (const struct die_reader_specs *reader,
12990 struct die_info **diep, gdb_byte *info_ptr,
12991 int *has_children, int num_extra_attrs)
12993 unsigned int abbrev_number, bytes_read, i;
12994 sect_offset offset;
12995 struct abbrev_info *abbrev;
12996 struct die_info *die;
12997 struct dwarf2_cu *cu = reader->cu;
12998 bfd *abfd = reader->abfd;
13000 offset.sect_off = info_ptr - reader->buffer;
13001 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
13002 info_ptr += bytes_read;
13003 if (!abbrev_number)
13010 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
13012 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
13014 bfd_get_filename (abfd));
13016 die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs);
13017 die->offset = offset;
13018 die->tag = abbrev->tag;
13019 die->abbrev = abbrev_number;
13021 /* Make the result usable.
13022 The caller needs to update num_attrs after adding the extra
13024 die->num_attrs = abbrev->num_attrs;
13026 for (i = 0; i < abbrev->num_attrs; ++i)
13027 info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i],
13031 *has_children = abbrev->has_children;
13035 /* Read a die and all its attributes.
13036 Set DIEP to point to a newly allocated die with its information,
13037 except for its child, sibling, and parent fields.
13038 Set HAS_CHILDREN to tell whether the die has children or not. */
13041 read_full_die (const struct die_reader_specs *reader,
13042 struct die_info **diep, gdb_byte *info_ptr,
13045 return read_full_die_1 (reader, diep, info_ptr, has_children, 0);
13048 /* Abbreviation tables.
13050 In DWARF version 2, the description of the debugging information is
13051 stored in a separate .debug_abbrev section. Before we read any
13052 dies from a section we read in all abbreviations and install them
13053 in a hash table. */
13055 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
13057 static struct abbrev_info *
13058 abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table)
13060 struct abbrev_info *abbrev;
13062 abbrev = (struct abbrev_info *)
13063 obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info));
13064 memset (abbrev, 0, sizeof (struct abbrev_info));
13068 /* Add an abbreviation to the table. */
13071 abbrev_table_add_abbrev (struct abbrev_table *abbrev_table,
13072 unsigned int abbrev_number,
13073 struct abbrev_info *abbrev)
13075 unsigned int hash_number;
13077 hash_number = abbrev_number % ABBREV_HASH_SIZE;
13078 abbrev->next = abbrev_table->abbrevs[hash_number];
13079 abbrev_table->abbrevs[hash_number] = abbrev;
13082 /* Look up an abbrev in the table.
13083 Returns NULL if the abbrev is not found. */
13085 static struct abbrev_info *
13086 abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table,
13087 unsigned int abbrev_number)
13089 unsigned int hash_number;
13090 struct abbrev_info *abbrev;
13092 hash_number = abbrev_number % ABBREV_HASH_SIZE;
13093 abbrev = abbrev_table->abbrevs[hash_number];
13097 if (abbrev->number == abbrev_number)
13099 abbrev = abbrev->next;
13104 /* Read in an abbrev table. */
13106 static struct abbrev_table *
13107 abbrev_table_read_table (struct dwarf2_section_info *section,
13108 sect_offset offset)
13110 struct objfile *objfile = dwarf2_per_objfile->objfile;
13111 bfd *abfd = section->asection->owner;
13112 struct abbrev_table *abbrev_table;
13113 gdb_byte *abbrev_ptr;
13114 struct abbrev_info *cur_abbrev;
13115 unsigned int abbrev_number, bytes_read, abbrev_name;
13116 unsigned int abbrev_form;
13117 struct attr_abbrev *cur_attrs;
13118 unsigned int allocated_attrs;
13120 abbrev_table = XMALLOC (struct abbrev_table);
13121 abbrev_table->offset = offset;
13122 obstack_init (&abbrev_table->abbrev_obstack);
13123 abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack,
13125 * sizeof (struct abbrev_info *)));
13126 memset (abbrev_table->abbrevs, 0,
13127 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
13129 dwarf2_read_section (objfile, section);
13130 abbrev_ptr = section->buffer + offset.sect_off;
13131 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13132 abbrev_ptr += bytes_read;
13134 allocated_attrs = ATTR_ALLOC_CHUNK;
13135 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
13137 /* Loop until we reach an abbrev number of 0. */
13138 while (abbrev_number)
13140 cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table);
13142 /* read in abbrev header */
13143 cur_abbrev->number = abbrev_number;
13144 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13145 abbrev_ptr += bytes_read;
13146 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
13149 /* now read in declarations */
13150 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13151 abbrev_ptr += bytes_read;
13152 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13153 abbrev_ptr += bytes_read;
13154 while (abbrev_name)
13156 if (cur_abbrev->num_attrs == allocated_attrs)
13158 allocated_attrs += ATTR_ALLOC_CHUNK;
13160 = xrealloc (cur_attrs, (allocated_attrs
13161 * sizeof (struct attr_abbrev)));
13164 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
13165 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
13166 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13167 abbrev_ptr += bytes_read;
13168 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13169 abbrev_ptr += bytes_read;
13172 cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack,
13173 (cur_abbrev->num_attrs
13174 * sizeof (struct attr_abbrev)));
13175 memcpy (cur_abbrev->attrs, cur_attrs,
13176 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
13178 abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev);
13180 /* Get next abbreviation.
13181 Under Irix6 the abbreviations for a compilation unit are not
13182 always properly terminated with an abbrev number of 0.
13183 Exit loop if we encounter an abbreviation which we have
13184 already read (which means we are about to read the abbreviations
13185 for the next compile unit) or if the end of the abbreviation
13186 table is reached. */
13187 if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size)
13189 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
13190 abbrev_ptr += bytes_read;
13191 if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL)
13196 return abbrev_table;
13199 /* Free the resources held by ABBREV_TABLE. */
13202 abbrev_table_free (struct abbrev_table *abbrev_table)
13204 obstack_free (&abbrev_table->abbrev_obstack, NULL);
13205 xfree (abbrev_table);
13208 /* Same as abbrev_table_free but as a cleanup.
13209 We pass in a pointer to the pointer to the table so that we can
13210 set the pointer to NULL when we're done. It also simplifies
13211 build_type_unit_groups. */
13214 abbrev_table_free_cleanup (void *table_ptr)
13216 struct abbrev_table **abbrev_table_ptr = table_ptr;
13218 if (*abbrev_table_ptr != NULL)
13219 abbrev_table_free (*abbrev_table_ptr);
13220 *abbrev_table_ptr = NULL;
13223 /* Read the abbrev table for CU from ABBREV_SECTION. */
13226 dwarf2_read_abbrevs (struct dwarf2_cu *cu,
13227 struct dwarf2_section_info *abbrev_section)
13230 abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset);
13233 /* Release the memory used by the abbrev table for a compilation unit. */
13236 dwarf2_free_abbrev_table (void *ptr_to_cu)
13238 struct dwarf2_cu *cu = ptr_to_cu;
13240 abbrev_table_free (cu->abbrev_table);
13241 /* Set this to NULL so that we SEGV if we try to read it later,
13242 and also because free_comp_unit verifies this is NULL. */
13243 cu->abbrev_table = NULL;
13246 /* Returns nonzero if TAG represents a type that we might generate a partial
13250 is_type_tag_for_partial (int tag)
13255 /* Some types that would be reasonable to generate partial symbols for,
13256 that we don't at present. */
13257 case DW_TAG_array_type:
13258 case DW_TAG_file_type:
13259 case DW_TAG_ptr_to_member_type:
13260 case DW_TAG_set_type:
13261 case DW_TAG_string_type:
13262 case DW_TAG_subroutine_type:
13264 case DW_TAG_base_type:
13265 case DW_TAG_class_type:
13266 case DW_TAG_interface_type:
13267 case DW_TAG_enumeration_type:
13268 case DW_TAG_structure_type:
13269 case DW_TAG_subrange_type:
13270 case DW_TAG_typedef:
13271 case DW_TAG_union_type:
13278 /* Load all DIEs that are interesting for partial symbols into memory. */
13280 static struct partial_die_info *
13281 load_partial_dies (const struct die_reader_specs *reader,
13282 gdb_byte *info_ptr, int building_psymtab)
13284 struct dwarf2_cu *cu = reader->cu;
13285 struct objfile *objfile = cu->objfile;
13286 struct partial_die_info *part_die;
13287 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
13288 struct abbrev_info *abbrev;
13289 unsigned int bytes_read;
13290 unsigned int load_all = 0;
13291 int nesting_level = 1;
13296 gdb_assert (cu->per_cu != NULL);
13297 if (cu->per_cu->load_all_dies)
13301 = htab_create_alloc_ex (cu->header.length / 12,
13305 &cu->comp_unit_obstack,
13306 hashtab_obstack_allocate,
13307 dummy_obstack_deallocate);
13309 part_die = obstack_alloc (&cu->comp_unit_obstack,
13310 sizeof (struct partial_die_info));
13314 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
13316 /* A NULL abbrev means the end of a series of children. */
13317 if (abbrev == NULL)
13319 if (--nesting_level == 0)
13321 /* PART_DIE was probably the last thing allocated on the
13322 comp_unit_obstack, so we could call obstack_free
13323 here. We don't do that because the waste is small,
13324 and will be cleaned up when we're done with this
13325 compilation unit. This way, we're also more robust
13326 against other users of the comp_unit_obstack. */
13329 info_ptr += bytes_read;
13330 last_die = parent_die;
13331 parent_die = parent_die->die_parent;
13335 /* Check for template arguments. We never save these; if
13336 they're seen, we just mark the parent, and go on our way. */
13337 if (parent_die != NULL
13338 && cu->language == language_cplus
13339 && (abbrev->tag == DW_TAG_template_type_param
13340 || abbrev->tag == DW_TAG_template_value_param))
13342 parent_die->has_template_arguments = 1;
13346 /* We don't need a partial DIE for the template argument. */
13347 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
13352 /* We only recurse into c++ subprograms looking for template arguments.
13353 Skip their other children. */
13355 && cu->language == language_cplus
13356 && parent_die != NULL
13357 && parent_die->tag == DW_TAG_subprogram)
13359 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
13363 /* Check whether this DIE is interesting enough to save. Normally
13364 we would not be interested in members here, but there may be
13365 later variables referencing them via DW_AT_specification (for
13366 static members). */
13368 && !is_type_tag_for_partial (abbrev->tag)
13369 && abbrev->tag != DW_TAG_constant
13370 && abbrev->tag != DW_TAG_enumerator
13371 && abbrev->tag != DW_TAG_subprogram
13372 && abbrev->tag != DW_TAG_lexical_block
13373 && abbrev->tag != DW_TAG_variable
13374 && abbrev->tag != DW_TAG_namespace
13375 && abbrev->tag != DW_TAG_module
13376 && abbrev->tag != DW_TAG_member
13377 && abbrev->tag != DW_TAG_imported_unit)
13379 /* Otherwise we skip to the next sibling, if any. */
13380 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
13384 info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read,
13387 /* This two-pass algorithm for processing partial symbols has a
13388 high cost in cache pressure. Thus, handle some simple cases
13389 here which cover the majority of C partial symbols. DIEs
13390 which neither have specification tags in them, nor could have
13391 specification tags elsewhere pointing at them, can simply be
13392 processed and discarded.
13394 This segment is also optional; scan_partial_symbols and
13395 add_partial_symbol will handle these DIEs if we chain
13396 them in normally. When compilers which do not emit large
13397 quantities of duplicate debug information are more common,
13398 this code can probably be removed. */
13400 /* Any complete simple types at the top level (pretty much all
13401 of them, for a language without namespaces), can be processed
13403 if (parent_die == NULL
13404 && part_die->has_specification == 0
13405 && part_die->is_declaration == 0
13406 && ((part_die->tag == DW_TAG_typedef && !part_die->has_children)
13407 || part_die->tag == DW_TAG_base_type
13408 || part_die->tag == DW_TAG_subrange_type))
13410 if (building_psymtab && part_die->name != NULL)
13411 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
13412 VAR_DOMAIN, LOC_TYPEDEF,
13413 &objfile->static_psymbols,
13414 0, (CORE_ADDR) 0, cu->language, objfile);
13415 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
13419 /* The exception for DW_TAG_typedef with has_children above is
13420 a workaround of GCC PR debug/47510. In the case of this complaint
13421 type_name_no_tag_or_error will error on such types later.
13423 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13424 it could not find the child DIEs referenced later, this is checked
13425 above. In correct DWARF DW_TAG_typedef should have no children. */
13427 if (part_die->tag == DW_TAG_typedef && part_die->has_children)
13428 complaint (&symfile_complaints,
13429 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13430 "- DIE at 0x%x [in module %s]"),
13431 part_die->offset.sect_off, objfile->name);
13433 /* If we're at the second level, and we're an enumerator, and
13434 our parent has no specification (meaning possibly lives in a
13435 namespace elsewhere), then we can add the partial symbol now
13436 instead of queueing it. */
13437 if (part_die->tag == DW_TAG_enumerator
13438 && parent_die != NULL
13439 && parent_die->die_parent == NULL
13440 && parent_die->tag == DW_TAG_enumeration_type
13441 && parent_die->has_specification == 0)
13443 if (part_die->name == NULL)
13444 complaint (&symfile_complaints,
13445 _("malformed enumerator DIE ignored"));
13446 else if (building_psymtab)
13447 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
13448 VAR_DOMAIN, LOC_CONST,
13449 (cu->language == language_cplus
13450 || cu->language == language_java)
13451 ? &objfile->global_psymbols
13452 : &objfile->static_psymbols,
13453 0, (CORE_ADDR) 0, cu->language, objfile);
13455 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
13459 /* We'll save this DIE so link it in. */
13460 part_die->die_parent = parent_die;
13461 part_die->die_sibling = NULL;
13462 part_die->die_child = NULL;
13464 if (last_die && last_die == parent_die)
13465 last_die->die_child = part_die;
13467 last_die->die_sibling = part_die;
13469 last_die = part_die;
13471 if (first_die == NULL)
13472 first_die = part_die;
13474 /* Maybe add the DIE to the hash table. Not all DIEs that we
13475 find interesting need to be in the hash table, because we
13476 also have the parent/sibling/child chains; only those that we
13477 might refer to by offset later during partial symbol reading.
13479 For now this means things that might have be the target of a
13480 DW_AT_specification, DW_AT_abstract_origin, or
13481 DW_AT_extension. DW_AT_extension will refer only to
13482 namespaces; DW_AT_abstract_origin refers to functions (and
13483 many things under the function DIE, but we do not recurse
13484 into function DIEs during partial symbol reading) and
13485 possibly variables as well; DW_AT_specification refers to
13486 declarations. Declarations ought to have the DW_AT_declaration
13487 flag. It happens that GCC forgets to put it in sometimes, but
13488 only for functions, not for types.
13490 Adding more things than necessary to the hash table is harmless
13491 except for the performance cost. Adding too few will result in
13492 wasted time in find_partial_die, when we reread the compilation
13493 unit with load_all_dies set. */
13496 || abbrev->tag == DW_TAG_constant
13497 || abbrev->tag == DW_TAG_subprogram
13498 || abbrev->tag == DW_TAG_variable
13499 || abbrev->tag == DW_TAG_namespace
13500 || part_die->is_declaration)
13504 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
13505 part_die->offset.sect_off, INSERT);
13509 part_die = obstack_alloc (&cu->comp_unit_obstack,
13510 sizeof (struct partial_die_info));
13512 /* For some DIEs we want to follow their children (if any). For C
13513 we have no reason to follow the children of structures; for other
13514 languages we have to, so that we can get at method physnames
13515 to infer fully qualified class names, for DW_AT_specification,
13516 and for C++ template arguments. For C++, we also look one level
13517 inside functions to find template arguments (if the name of the
13518 function does not already contain the template arguments).
13520 For Ada, we need to scan the children of subprograms and lexical
13521 blocks as well because Ada allows the definition of nested
13522 entities that could be interesting for the debugger, such as
13523 nested subprograms for instance. */
13524 if (last_die->has_children
13526 || last_die->tag == DW_TAG_namespace
13527 || last_die->tag == DW_TAG_module
13528 || last_die->tag == DW_TAG_enumeration_type
13529 || (cu->language == language_cplus
13530 && last_die->tag == DW_TAG_subprogram
13531 && (last_die->name == NULL
13532 || strchr (last_die->name, '<') == NULL))
13533 || (cu->language != language_c
13534 && (last_die->tag == DW_TAG_class_type
13535 || last_die->tag == DW_TAG_interface_type
13536 || last_die->tag == DW_TAG_structure_type
13537 || last_die->tag == DW_TAG_union_type))
13538 || (cu->language == language_ada
13539 && (last_die->tag == DW_TAG_subprogram
13540 || last_die->tag == DW_TAG_lexical_block))))
13543 parent_die = last_die;
13547 /* Otherwise we skip to the next sibling, if any. */
13548 info_ptr = locate_pdi_sibling (reader, last_die, info_ptr);
13550 /* Back to the top, do it again. */
13554 /* Read a minimal amount of information into the minimal die structure. */
13557 read_partial_die (const struct die_reader_specs *reader,
13558 struct partial_die_info *part_die,
13559 struct abbrev_info *abbrev, unsigned int abbrev_len,
13560 gdb_byte *info_ptr)
13562 struct dwarf2_cu *cu = reader->cu;
13563 struct objfile *objfile = cu->objfile;
13564 gdb_byte *buffer = reader->buffer;
13566 struct attribute attr;
13567 int has_low_pc_attr = 0;
13568 int has_high_pc_attr = 0;
13569 int high_pc_relative = 0;
13571 memset (part_die, 0, sizeof (struct partial_die_info));
13573 part_die->offset.sect_off = info_ptr - buffer;
13575 info_ptr += abbrev_len;
13577 if (abbrev == NULL)
13580 part_die->tag = abbrev->tag;
13581 part_die->has_children = abbrev->has_children;
13583 for (i = 0; i < abbrev->num_attrs; ++i)
13585 info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
13587 /* Store the data if it is of an attribute we want to keep in a
13588 partial symbol table. */
13592 switch (part_die->tag)
13594 case DW_TAG_compile_unit:
13595 case DW_TAG_partial_unit:
13596 case DW_TAG_type_unit:
13597 /* Compilation units have a DW_AT_name that is a filename, not
13598 a source language identifier. */
13599 case DW_TAG_enumeration_type:
13600 case DW_TAG_enumerator:
13601 /* These tags always have simple identifiers already; no need
13602 to canonicalize them. */
13603 part_die->name = DW_STRING (&attr);
13607 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
13608 &objfile->objfile_obstack);
13612 case DW_AT_linkage_name:
13613 case DW_AT_MIPS_linkage_name:
13614 /* Note that both forms of linkage name might appear. We
13615 assume they will be the same, and we only store the last
13617 if (cu->language == language_ada)
13618 part_die->name = DW_STRING (&attr);
13619 part_die->linkage_name = DW_STRING (&attr);
13622 has_low_pc_attr = 1;
13623 part_die->lowpc = DW_ADDR (&attr);
13625 case DW_AT_high_pc:
13626 has_high_pc_attr = 1;
13627 if (attr.form == DW_FORM_addr
13628 || attr.form == DW_FORM_GNU_addr_index)
13629 part_die->highpc = DW_ADDR (&attr);
13632 high_pc_relative = 1;
13633 part_die->highpc = DW_UNSND (&attr);
13636 case DW_AT_location:
13637 /* Support the .debug_loc offsets. */
13638 if (attr_form_is_block (&attr))
13640 part_die->d.locdesc = DW_BLOCK (&attr);
13642 else if (attr_form_is_section_offset (&attr))
13644 dwarf2_complex_location_expr_complaint ();
13648 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13649 "partial symbol information");
13652 case DW_AT_external:
13653 part_die->is_external = DW_UNSND (&attr);
13655 case DW_AT_declaration:
13656 part_die->is_declaration = DW_UNSND (&attr);
13659 part_die->has_type = 1;
13661 case DW_AT_abstract_origin:
13662 case DW_AT_specification:
13663 case DW_AT_extension:
13664 part_die->has_specification = 1;
13665 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
13666 part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt
13667 || cu->per_cu->is_dwz);
13669 case DW_AT_sibling:
13670 /* Ignore absolute siblings, they might point outside of
13671 the current compile unit. */
13672 if (attr.form == DW_FORM_ref_addr)
13673 complaint (&symfile_complaints,
13674 _("ignoring absolute DW_AT_sibling"));
13676 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
13678 case DW_AT_byte_size:
13679 part_die->has_byte_size = 1;
13681 case DW_AT_calling_convention:
13682 /* DWARF doesn't provide a way to identify a program's source-level
13683 entry point. DW_AT_calling_convention attributes are only meant
13684 to describe functions' calling conventions.
13686 However, because it's a necessary piece of information in
13687 Fortran, and because DW_CC_program is the only piece of debugging
13688 information whose definition refers to a 'main program' at all,
13689 several compilers have begun marking Fortran main programs with
13690 DW_CC_program --- even when those functions use the standard
13691 calling conventions.
13693 So until DWARF specifies a way to provide this information and
13694 compilers pick up the new representation, we'll support this
13696 if (DW_UNSND (&attr) == DW_CC_program
13697 && cu->language == language_fortran)
13699 set_main_name (part_die->name);
13701 /* As this DIE has a static linkage the name would be difficult
13702 to look up later. */
13703 language_of_main = language_fortran;
13707 if (DW_UNSND (&attr) == DW_INL_inlined
13708 || DW_UNSND (&attr) == DW_INL_declared_inlined)
13709 part_die->may_be_inlined = 1;
13713 if (part_die->tag == DW_TAG_imported_unit)
13715 part_die->d.offset = dwarf2_get_ref_die_offset (&attr);
13716 part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt
13717 || cu->per_cu->is_dwz);
13726 if (high_pc_relative)
13727 part_die->highpc += part_die->lowpc;
13729 if (has_low_pc_attr && has_high_pc_attr)
13731 /* When using the GNU linker, .gnu.linkonce. sections are used to
13732 eliminate duplicate copies of functions and vtables and such.
13733 The linker will arbitrarily choose one and discard the others.
13734 The AT_*_pc values for such functions refer to local labels in
13735 these sections. If the section from that file was discarded, the
13736 labels are not in the output, so the relocs get a value of 0.
13737 If this is a discarded function, mark the pc bounds as invalid,
13738 so that GDB will ignore it. */
13739 if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero)
13741 struct gdbarch *gdbarch = get_objfile_arch (objfile);
13743 complaint (&symfile_complaints,
13744 _("DW_AT_low_pc %s is zero "
13745 "for DIE at 0x%x [in module %s]"),
13746 paddress (gdbarch, part_die->lowpc),
13747 part_die->offset.sect_off, objfile->name);
13749 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13750 else if (part_die->lowpc >= part_die->highpc)
13752 struct gdbarch *gdbarch = get_objfile_arch (objfile);
13754 complaint (&symfile_complaints,
13755 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13756 "for DIE at 0x%x [in module %s]"),
13757 paddress (gdbarch, part_die->lowpc),
13758 paddress (gdbarch, part_die->highpc),
13759 part_die->offset.sect_off, objfile->name);
13762 part_die->has_pc_info = 1;
13768 /* Find a cached partial DIE at OFFSET in CU. */
13770 static struct partial_die_info *
13771 find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu)
13773 struct partial_die_info *lookup_die = NULL;
13774 struct partial_die_info part_die;
13776 part_die.offset = offset;
13777 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die,
13783 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13784 except in the case of .debug_types DIEs which do not reference
13785 outside their CU (they do however referencing other types via
13786 DW_FORM_ref_sig8). */
13788 static struct partial_die_info *
13789 find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu)
13791 struct objfile *objfile = cu->objfile;
13792 struct dwarf2_per_cu_data *per_cu = NULL;
13793 struct partial_die_info *pd = NULL;
13795 if (offset_in_dwz == cu->per_cu->is_dwz
13796 && offset_in_cu_p (&cu->header, offset))
13798 pd = find_partial_die_in_comp_unit (offset, cu);
13801 /* We missed recording what we needed.
13802 Load all dies and try again. */
13803 per_cu = cu->per_cu;
13807 /* TUs don't reference other CUs/TUs (except via type signatures). */
13808 if (cu->per_cu->is_debug_types)
13810 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13811 " external reference to offset 0x%lx [in module %s].\n"),
13812 (long) cu->header.offset.sect_off, (long) offset.sect_off,
13813 bfd_get_filename (objfile->obfd));
13815 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
13818 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
13819 load_partial_comp_unit (per_cu);
13821 per_cu->cu->last_used = 0;
13822 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
13825 /* If we didn't find it, and not all dies have been loaded,
13826 load them all and try again. */
13828 if (pd == NULL && per_cu->load_all_dies == 0)
13830 per_cu->load_all_dies = 1;
13832 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13833 THIS_CU->cu may already be in use. So we can't just free it and
13834 replace its DIEs with the ones we read in. Instead, we leave those
13835 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13836 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13838 load_partial_comp_unit (per_cu);
13840 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
13844 internal_error (__FILE__, __LINE__,
13845 _("could not find partial DIE 0x%x "
13846 "in cache [from module %s]\n"),
13847 offset.sect_off, bfd_get_filename (objfile->obfd));
13851 /* See if we can figure out if the class lives in a namespace. We do
13852 this by looking for a member function; its demangled name will
13853 contain namespace info, if there is any. */
13856 guess_partial_die_structure_name (struct partial_die_info *struct_pdi,
13857 struct dwarf2_cu *cu)
13859 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13860 what template types look like, because the demangler
13861 frequently doesn't give the same name as the debug info. We
13862 could fix this by only using the demangled name to get the
13863 prefix (but see comment in read_structure_type). */
13865 struct partial_die_info *real_pdi;
13866 struct partial_die_info *child_pdi;
13868 /* If this DIE (this DIE's specification, if any) has a parent, then
13869 we should not do this. We'll prepend the parent's fully qualified
13870 name when we create the partial symbol. */
13872 real_pdi = struct_pdi;
13873 while (real_pdi->has_specification)
13874 real_pdi = find_partial_die (real_pdi->spec_offset,
13875 real_pdi->spec_is_dwz, cu);
13877 if (real_pdi->die_parent != NULL)
13880 for (child_pdi = struct_pdi->die_child;
13882 child_pdi = child_pdi->die_sibling)
13884 if (child_pdi->tag == DW_TAG_subprogram
13885 && child_pdi->linkage_name != NULL)
13887 char *actual_class_name
13888 = language_class_name_from_physname (cu->language_defn,
13889 child_pdi->linkage_name);
13890 if (actual_class_name != NULL)
13893 = obstack_copy0 (&cu->objfile->objfile_obstack,
13895 strlen (actual_class_name));
13896 xfree (actual_class_name);
13903 /* Adjust PART_DIE before generating a symbol for it. This function
13904 may set the is_external flag or change the DIE's name. */
13907 fixup_partial_die (struct partial_die_info *part_die,
13908 struct dwarf2_cu *cu)
13910 /* Once we've fixed up a die, there's no point in doing so again.
13911 This also avoids a memory leak if we were to call
13912 guess_partial_die_structure_name multiple times. */
13913 if (part_die->fixup_called)
13916 /* If we found a reference attribute and the DIE has no name, try
13917 to find a name in the referred to DIE. */
13919 if (part_die->name == NULL && part_die->has_specification)
13921 struct partial_die_info *spec_die;
13923 spec_die = find_partial_die (part_die->spec_offset,
13924 part_die->spec_is_dwz, cu);
13926 fixup_partial_die (spec_die, cu);
13928 if (spec_die->name)
13930 part_die->name = spec_die->name;
13932 /* Copy DW_AT_external attribute if it is set. */
13933 if (spec_die->is_external)
13934 part_die->is_external = spec_die->is_external;
13938 /* Set default names for some unnamed DIEs. */
13940 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
13941 part_die->name = CP_ANONYMOUS_NAMESPACE_STR;
13943 /* If there is no parent die to provide a namespace, and there are
13944 children, see if we can determine the namespace from their linkage
13946 if (cu->language == language_cplus
13947 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
13948 && part_die->die_parent == NULL
13949 && part_die->has_children
13950 && (part_die->tag == DW_TAG_class_type
13951 || part_die->tag == DW_TAG_structure_type
13952 || part_die->tag == DW_TAG_union_type))
13953 guess_partial_die_structure_name (part_die, cu);
13955 /* GCC might emit a nameless struct or union that has a linkage
13956 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13957 if (part_die->name == NULL
13958 && (part_die->tag == DW_TAG_class_type
13959 || part_die->tag == DW_TAG_interface_type
13960 || part_die->tag == DW_TAG_structure_type
13961 || part_die->tag == DW_TAG_union_type)
13962 && part_die->linkage_name != NULL)
13966 demangled = cplus_demangle (part_die->linkage_name, DMGL_TYPES);
13971 /* Strip any leading namespaces/classes, keep only the base name.
13972 DW_AT_name for named DIEs does not contain the prefixes. */
13973 base = strrchr (demangled, ':');
13974 if (base && base > demangled && base[-1] == ':')
13979 part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack,
13980 base, strlen (base));
13985 part_die->fixup_called = 1;
13988 /* Read an attribute value described by an attribute form. */
13991 read_attribute_value (const struct die_reader_specs *reader,
13992 struct attribute *attr, unsigned form,
13993 gdb_byte *info_ptr)
13995 struct dwarf2_cu *cu = reader->cu;
13996 bfd *abfd = reader->abfd;
13997 struct comp_unit_head *cu_header = &cu->header;
13998 unsigned int bytes_read;
13999 struct dwarf_block *blk;
14004 case DW_FORM_ref_addr:
14005 if (cu->header.version == 2)
14006 DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
14008 DW_UNSND (attr) = read_offset (abfd, info_ptr,
14009 &cu->header, &bytes_read);
14010 info_ptr += bytes_read;
14012 case DW_FORM_GNU_ref_alt:
14013 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
14014 info_ptr += bytes_read;
14017 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
14018 info_ptr += bytes_read;
14020 case DW_FORM_block2:
14021 blk = dwarf_alloc_block (cu);
14022 blk->size = read_2_bytes (abfd, info_ptr);
14024 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14025 info_ptr += blk->size;
14026 DW_BLOCK (attr) = blk;
14028 case DW_FORM_block4:
14029 blk = dwarf_alloc_block (cu);
14030 blk->size = read_4_bytes (abfd, info_ptr);
14032 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14033 info_ptr += blk->size;
14034 DW_BLOCK (attr) = blk;
14036 case DW_FORM_data2:
14037 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
14040 case DW_FORM_data4:
14041 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
14044 case DW_FORM_data8:
14045 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
14048 case DW_FORM_sec_offset:
14049 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
14050 info_ptr += bytes_read;
14052 case DW_FORM_string:
14053 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
14054 DW_STRING_IS_CANONICAL (attr) = 0;
14055 info_ptr += bytes_read;
14058 if (!cu->per_cu->is_dwz)
14060 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
14062 DW_STRING_IS_CANONICAL (attr) = 0;
14063 info_ptr += bytes_read;
14067 case DW_FORM_GNU_strp_alt:
14069 struct dwz_file *dwz = dwarf2_get_dwz_file ();
14070 LONGEST str_offset = read_offset (abfd, info_ptr, cu_header,
14073 DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset);
14074 DW_STRING_IS_CANONICAL (attr) = 0;
14075 info_ptr += bytes_read;
14078 case DW_FORM_exprloc:
14079 case DW_FORM_block:
14080 blk = dwarf_alloc_block (cu);
14081 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14082 info_ptr += bytes_read;
14083 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14084 info_ptr += blk->size;
14085 DW_BLOCK (attr) = blk;
14087 case DW_FORM_block1:
14088 blk = dwarf_alloc_block (cu);
14089 blk->size = read_1_byte (abfd, info_ptr);
14091 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
14092 info_ptr += blk->size;
14093 DW_BLOCK (attr) = blk;
14095 case DW_FORM_data1:
14096 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
14100 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
14103 case DW_FORM_flag_present:
14104 DW_UNSND (attr) = 1;
14106 case DW_FORM_sdata:
14107 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
14108 info_ptr += bytes_read;
14110 case DW_FORM_udata:
14111 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14112 info_ptr += bytes_read;
14115 DW_UNSND (attr) = (cu->header.offset.sect_off
14116 + read_1_byte (abfd, info_ptr));
14120 DW_UNSND (attr) = (cu->header.offset.sect_off
14121 + read_2_bytes (abfd, info_ptr));
14125 DW_UNSND (attr) = (cu->header.offset.sect_off
14126 + read_4_bytes (abfd, info_ptr));
14130 DW_UNSND (attr) = (cu->header.offset.sect_off
14131 + read_8_bytes (abfd, info_ptr));
14134 case DW_FORM_ref_sig8:
14135 /* Convert the signature to something we can record in DW_UNSND
14137 NOTE: This is NULL if the type wasn't found. */
14138 DW_SIGNATURED_TYPE (attr) =
14139 lookup_signatured_type (read_8_bytes (abfd, info_ptr));
14142 case DW_FORM_ref_udata:
14143 DW_UNSND (attr) = (cu->header.offset.sect_off
14144 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
14145 info_ptr += bytes_read;
14147 case DW_FORM_indirect:
14148 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14149 info_ptr += bytes_read;
14150 info_ptr = read_attribute_value (reader, attr, form, info_ptr);
14152 case DW_FORM_GNU_addr_index:
14153 if (reader->dwo_file == NULL)
14155 /* For now flag a hard error.
14156 Later we can turn this into a complaint. */
14157 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14158 dwarf_form_name (form),
14159 bfd_get_filename (abfd));
14161 DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read);
14162 info_ptr += bytes_read;
14164 case DW_FORM_GNU_str_index:
14165 if (reader->dwo_file == NULL)
14167 /* For now flag a hard error.
14168 Later we can turn this into a complaint if warranted. */
14169 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14170 dwarf_form_name (form),
14171 bfd_get_filename (abfd));
14174 ULONGEST str_index =
14175 read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
14177 DW_STRING (attr) = read_str_index (reader, cu, str_index);
14178 DW_STRING_IS_CANONICAL (attr) = 0;
14179 info_ptr += bytes_read;
14183 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14184 dwarf_form_name (form),
14185 bfd_get_filename (abfd));
14189 if (cu->per_cu->is_dwz && is_ref_attr (attr))
14190 attr->form = DW_FORM_GNU_ref_alt;
14192 /* We have seen instances where the compiler tried to emit a byte
14193 size attribute of -1 which ended up being encoded as an unsigned
14194 0xffffffff. Although 0xffffffff is technically a valid size value,
14195 an object of this size seems pretty unlikely so we can relatively
14196 safely treat these cases as if the size attribute was invalid and
14197 treat them as zero by default. */
14198 if (attr->name == DW_AT_byte_size
14199 && form == DW_FORM_data4
14200 && DW_UNSND (attr) >= 0xffffffff)
14203 (&symfile_complaints,
14204 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14205 hex_string (DW_UNSND (attr)));
14206 DW_UNSND (attr) = 0;
14212 /* Read an attribute described by an abbreviated attribute. */
14215 read_attribute (const struct die_reader_specs *reader,
14216 struct attribute *attr, struct attr_abbrev *abbrev,
14217 gdb_byte *info_ptr)
14219 attr->name = abbrev->name;
14220 return read_attribute_value (reader, attr, abbrev->form, info_ptr);
14223 /* Read dwarf information from a buffer. */
14225 static unsigned int
14226 read_1_byte (bfd *abfd, const gdb_byte *buf)
14228 return bfd_get_8 (abfd, buf);
14232 read_1_signed_byte (bfd *abfd, const gdb_byte *buf)
14234 return bfd_get_signed_8 (abfd, buf);
14237 static unsigned int
14238 read_2_bytes (bfd *abfd, const gdb_byte *buf)
14240 return bfd_get_16 (abfd, buf);
14244 read_2_signed_bytes (bfd *abfd, const gdb_byte *buf)
14246 return bfd_get_signed_16 (abfd, buf);
14249 static unsigned int
14250 read_4_bytes (bfd *abfd, const gdb_byte *buf)
14252 return bfd_get_32 (abfd, buf);
14256 read_4_signed_bytes (bfd *abfd, const gdb_byte *buf)
14258 return bfd_get_signed_32 (abfd, buf);
14262 read_8_bytes (bfd *abfd, const gdb_byte *buf)
14264 return bfd_get_64 (abfd, buf);
14268 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
14269 unsigned int *bytes_read)
14271 struct comp_unit_head *cu_header = &cu->header;
14272 CORE_ADDR retval = 0;
14274 if (cu_header->signed_addr_p)
14276 switch (cu_header->addr_size)
14279 retval = bfd_get_signed_16 (abfd, buf);
14282 retval = bfd_get_signed_32 (abfd, buf);
14285 retval = bfd_get_signed_64 (abfd, buf);
14288 internal_error (__FILE__, __LINE__,
14289 _("read_address: bad switch, signed [in module %s]"),
14290 bfd_get_filename (abfd));
14295 switch (cu_header->addr_size)
14298 retval = bfd_get_16 (abfd, buf);
14301 retval = bfd_get_32 (abfd, buf);
14304 retval = bfd_get_64 (abfd, buf);
14307 internal_error (__FILE__, __LINE__,
14308 _("read_address: bad switch, "
14309 "unsigned [in module %s]"),
14310 bfd_get_filename (abfd));
14314 *bytes_read = cu_header->addr_size;
14318 /* Read the initial length from a section. The (draft) DWARF 3
14319 specification allows the initial length to take up either 4 bytes
14320 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14321 bytes describe the length and all offsets will be 8 bytes in length
14324 An older, non-standard 64-bit format is also handled by this
14325 function. The older format in question stores the initial length
14326 as an 8-byte quantity without an escape value. Lengths greater
14327 than 2^32 aren't very common which means that the initial 4 bytes
14328 is almost always zero. Since a length value of zero doesn't make
14329 sense for the 32-bit format, this initial zero can be considered to
14330 be an escape value which indicates the presence of the older 64-bit
14331 format. As written, the code can't detect (old format) lengths
14332 greater than 4GB. If it becomes necessary to handle lengths
14333 somewhat larger than 4GB, we could allow other small values (such
14334 as the non-sensical values of 1, 2, and 3) to also be used as
14335 escape values indicating the presence of the old format.
14337 The value returned via bytes_read should be used to increment the
14338 relevant pointer after calling read_initial_length().
14340 [ Note: read_initial_length() and read_offset() are based on the
14341 document entitled "DWARF Debugging Information Format", revision
14342 3, draft 8, dated November 19, 2001. This document was obtained
14345 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14347 This document is only a draft and is subject to change. (So beware.)
14349 Details regarding the older, non-standard 64-bit format were
14350 determined empirically by examining 64-bit ELF files produced by
14351 the SGI toolchain on an IRIX 6.5 machine.
14353 - Kevin, July 16, 2002
14357 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
14359 LONGEST length = bfd_get_32 (abfd, buf);
14361 if (length == 0xffffffff)
14363 length = bfd_get_64 (abfd, buf + 4);
14366 else if (length == 0)
14368 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14369 length = bfd_get_64 (abfd, buf);
14380 /* Cover function for read_initial_length.
14381 Returns the length of the object at BUF, and stores the size of the
14382 initial length in *BYTES_READ and stores the size that offsets will be in
14384 If the initial length size is not equivalent to that specified in
14385 CU_HEADER then issue a complaint.
14386 This is useful when reading non-comp-unit headers. */
14389 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
14390 const struct comp_unit_head *cu_header,
14391 unsigned int *bytes_read,
14392 unsigned int *offset_size)
14394 LONGEST length = read_initial_length (abfd, buf, bytes_read);
14396 gdb_assert (cu_header->initial_length_size == 4
14397 || cu_header->initial_length_size == 8
14398 || cu_header->initial_length_size == 12);
14400 if (cu_header->initial_length_size != *bytes_read)
14401 complaint (&symfile_complaints,
14402 _("intermixed 32-bit and 64-bit DWARF sections"));
14404 *offset_size = (*bytes_read == 4) ? 4 : 8;
14408 /* Read an offset from the data stream. The size of the offset is
14409 given by cu_header->offset_size. */
14412 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
14413 unsigned int *bytes_read)
14415 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
14417 *bytes_read = cu_header->offset_size;
14421 /* Read an offset from the data stream. */
14424 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
14426 LONGEST retval = 0;
14428 switch (offset_size)
14431 retval = bfd_get_32 (abfd, buf);
14434 retval = bfd_get_64 (abfd, buf);
14437 internal_error (__FILE__, __LINE__,
14438 _("read_offset_1: bad switch [in module %s]"),
14439 bfd_get_filename (abfd));
14446 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
14448 /* If the size of a host char is 8 bits, we can return a pointer
14449 to the buffer, otherwise we have to copy the data to a buffer
14450 allocated on the temporary obstack. */
14451 gdb_assert (HOST_CHAR_BIT == 8);
14456 read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
14458 /* If the size of a host char is 8 bits, we can return a pointer
14459 to the string, otherwise we have to copy the string to a buffer
14460 allocated on the temporary obstack. */
14461 gdb_assert (HOST_CHAR_BIT == 8);
14464 *bytes_read_ptr = 1;
14467 *bytes_read_ptr = strlen ((char *) buf) + 1;
14468 return (char *) buf;
14472 read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset)
14474 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
14475 if (dwarf2_per_objfile->str.buffer == NULL)
14476 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14477 bfd_get_filename (abfd));
14478 if (str_offset >= dwarf2_per_objfile->str.size)
14479 error (_("DW_FORM_strp pointing outside of "
14480 ".debug_str section [in module %s]"),
14481 bfd_get_filename (abfd));
14482 gdb_assert (HOST_CHAR_BIT == 8);
14483 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
14485 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
14488 /* Read a string at offset STR_OFFSET in the .debug_str section from
14489 the .dwz file DWZ. Throw an error if the offset is too large. If
14490 the string consists of a single NUL byte, return NULL; otherwise
14491 return a pointer to the string. */
14494 read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset)
14496 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str);
14498 if (dwz->str.buffer == NULL)
14499 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14500 "section [in module %s]"),
14501 bfd_get_filename (dwz->dwz_bfd));
14502 if (str_offset >= dwz->str.size)
14503 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14504 ".debug_str section [in module %s]"),
14505 bfd_get_filename (dwz->dwz_bfd));
14506 gdb_assert (HOST_CHAR_BIT == 8);
14507 if (dwz->str.buffer[str_offset] == '\0')
14509 return (char *) (dwz->str.buffer + str_offset);
14513 read_indirect_string (bfd *abfd, gdb_byte *buf,
14514 const struct comp_unit_head *cu_header,
14515 unsigned int *bytes_read_ptr)
14517 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
14519 return read_indirect_string_at_offset (abfd, str_offset);
14523 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
14526 unsigned int num_read;
14528 unsigned char byte;
14536 byte = bfd_get_8 (abfd, buf);
14539 result |= ((ULONGEST) (byte & 127) << shift);
14540 if ((byte & 128) == 0)
14546 *bytes_read_ptr = num_read;
14551 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
14554 int i, shift, num_read;
14555 unsigned char byte;
14563 byte = bfd_get_8 (abfd, buf);
14566 result |= ((LONGEST) (byte & 127) << shift);
14568 if ((byte & 128) == 0)
14573 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
14574 result |= -(((LONGEST) 1) << shift);
14575 *bytes_read_ptr = num_read;
14579 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14580 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14581 ADDR_SIZE is the size of addresses from the CU header. */
14584 read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size)
14586 struct objfile *objfile = dwarf2_per_objfile->objfile;
14587 bfd *abfd = objfile->obfd;
14588 const gdb_byte *info_ptr;
14590 dwarf2_read_section (objfile, &dwarf2_per_objfile->addr);
14591 if (dwarf2_per_objfile->addr.buffer == NULL)
14592 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14594 if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size)
14595 error (_("DW_FORM_addr_index pointing outside of "
14596 ".debug_addr section [in module %s]"),
14598 info_ptr = (dwarf2_per_objfile->addr.buffer
14599 + addr_base + addr_index * addr_size);
14600 if (addr_size == 4)
14601 return bfd_get_32 (abfd, info_ptr);
14603 return bfd_get_64 (abfd, info_ptr);
14606 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14609 read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index)
14611 return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size);
14614 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14617 read_addr_index_from_leb128 (struct dwarf2_cu *cu, gdb_byte *info_ptr,
14618 unsigned int *bytes_read)
14620 bfd *abfd = cu->objfile->obfd;
14621 unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
14623 return read_addr_index (cu, addr_index);
14626 /* Data structure to pass results from dwarf2_read_addr_index_reader
14627 back to dwarf2_read_addr_index. */
14629 struct dwarf2_read_addr_index_data
14631 ULONGEST addr_base;
14635 /* die_reader_func for dwarf2_read_addr_index. */
14638 dwarf2_read_addr_index_reader (const struct die_reader_specs *reader,
14639 gdb_byte *info_ptr,
14640 struct die_info *comp_unit_die,
14644 struct dwarf2_cu *cu = reader->cu;
14645 struct dwarf2_read_addr_index_data *aidata =
14646 (struct dwarf2_read_addr_index_data *) data;
14648 aidata->addr_base = cu->addr_base;
14649 aidata->addr_size = cu->header.addr_size;
14652 /* Given an index in .debug_addr, fetch the value.
14653 NOTE: This can be called during dwarf expression evaluation,
14654 long after the debug information has been read, and thus per_cu->cu
14655 may no longer exist. */
14658 dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
14659 unsigned int addr_index)
14661 struct objfile *objfile = per_cu->objfile;
14662 struct dwarf2_cu *cu = per_cu->cu;
14663 ULONGEST addr_base;
14666 /* This is intended to be called from outside this file. */
14667 dw2_setup (objfile);
14669 /* We need addr_base and addr_size.
14670 If we don't have PER_CU->cu, we have to get it.
14671 Nasty, but the alternative is storing the needed info in PER_CU,
14672 which at this point doesn't seem justified: it's not clear how frequently
14673 it would get used and it would increase the size of every PER_CU.
14674 Entry points like dwarf2_per_cu_addr_size do a similar thing
14675 so we're not in uncharted territory here.
14676 Alas we need to be a bit more complicated as addr_base is contained
14679 We don't need to read the entire CU(/TU).
14680 We just need the header and top level die.
14682 IWBN to use the aging mechanism to let us lazily later discard the CU.
14683 For now we skip this optimization. */
14687 addr_base = cu->addr_base;
14688 addr_size = cu->header.addr_size;
14692 struct dwarf2_read_addr_index_data aidata;
14694 /* Note: We can't use init_cutu_and_read_dies_simple here,
14695 we need addr_base. */
14696 init_cutu_and_read_dies (per_cu, NULL, 0, 0,
14697 dwarf2_read_addr_index_reader, &aidata);
14698 addr_base = aidata.addr_base;
14699 addr_size = aidata.addr_size;
14702 return read_addr_index_1 (addr_index, addr_base, addr_size);
14705 /* Given a DW_AT_str_index, fetch the string. */
14708 read_str_index (const struct die_reader_specs *reader,
14709 struct dwarf2_cu *cu, ULONGEST str_index)
14711 struct objfile *objfile = dwarf2_per_objfile->objfile;
14712 const char *dwo_name = objfile->name;
14713 bfd *abfd = objfile->obfd;
14714 struct dwo_sections *sections = &reader->dwo_file->sections;
14715 gdb_byte *info_ptr;
14716 ULONGEST str_offset;
14718 dwarf2_read_section (objfile, §ions->str);
14719 dwarf2_read_section (objfile, §ions->str_offsets);
14720 if (sections->str.buffer == NULL)
14721 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14722 " in CU at offset 0x%lx [in module %s]"),
14723 (long) cu->header.offset.sect_off, dwo_name);
14724 if (sections->str_offsets.buffer == NULL)
14725 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14726 " in CU at offset 0x%lx [in module %s]"),
14727 (long) cu->header.offset.sect_off, dwo_name);
14728 if (str_index * cu->header.offset_size >= sections->str_offsets.size)
14729 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14730 " section in CU at offset 0x%lx [in module %s]"),
14731 (long) cu->header.offset.sect_off, dwo_name);
14732 info_ptr = (sections->str_offsets.buffer
14733 + str_index * cu->header.offset_size);
14734 if (cu->header.offset_size == 4)
14735 str_offset = bfd_get_32 (abfd, info_ptr);
14737 str_offset = bfd_get_64 (abfd, info_ptr);
14738 if (str_offset >= sections->str.size)
14739 error (_("Offset from DW_FORM_str_index pointing outside of"
14740 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14741 (long) cu->header.offset.sect_off, dwo_name);
14742 return (char *) (sections->str.buffer + str_offset);
14745 /* Return the length of an LEB128 number in BUF. */
14748 leb128_size (const gdb_byte *buf)
14750 const gdb_byte *begin = buf;
14756 if ((byte & 128) == 0)
14757 return buf - begin;
14762 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
14769 cu->language = language_c;
14771 case DW_LANG_C_plus_plus:
14772 cu->language = language_cplus;
14775 cu->language = language_d;
14777 case DW_LANG_Fortran77:
14778 case DW_LANG_Fortran90:
14779 case DW_LANG_Fortran95:
14780 cu->language = language_fortran;
14783 cu->language = language_go;
14785 case DW_LANG_Mips_Assembler:
14786 cu->language = language_asm;
14789 cu->language = language_java;
14791 case DW_LANG_Ada83:
14792 case DW_LANG_Ada95:
14793 cu->language = language_ada;
14795 case DW_LANG_Modula2:
14796 cu->language = language_m2;
14798 case DW_LANG_Pascal83:
14799 cu->language = language_pascal;
14802 cu->language = language_objc;
14804 case DW_LANG_Cobol74:
14805 case DW_LANG_Cobol85:
14807 cu->language = language_minimal;
14810 cu->language_defn = language_def (cu->language);
14813 /* Return the named attribute or NULL if not there. */
14815 static struct attribute *
14816 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
14821 struct attribute *spec = NULL;
14823 for (i = 0; i < die->num_attrs; ++i)
14825 if (die->attrs[i].name == name)
14826 return &die->attrs[i];
14827 if (die->attrs[i].name == DW_AT_specification
14828 || die->attrs[i].name == DW_AT_abstract_origin)
14829 spec = &die->attrs[i];
14835 die = follow_die_ref (die, spec, &cu);
14841 /* Return the named attribute or NULL if not there,
14842 but do not follow DW_AT_specification, etc.
14843 This is for use in contexts where we're reading .debug_types dies.
14844 Following DW_AT_specification, DW_AT_abstract_origin will take us
14845 back up the chain, and we want to go down. */
14847 static struct attribute *
14848 dwarf2_attr_no_follow (struct die_info *die, unsigned int name)
14852 for (i = 0; i < die->num_attrs; ++i)
14853 if (die->attrs[i].name == name)
14854 return &die->attrs[i];
14859 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14860 and holds a non-zero value. This function should only be used for
14861 DW_FORM_flag or DW_FORM_flag_present attributes. */
14864 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
14866 struct attribute *attr = dwarf2_attr (die, name, cu);
14868 return (attr && DW_UNSND (attr));
14872 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
14874 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14875 which value is non-zero. However, we have to be careful with
14876 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14877 (via dwarf2_flag_true_p) follows this attribute. So we may
14878 end up accidently finding a declaration attribute that belongs
14879 to a different DIE referenced by the specification attribute,
14880 even though the given DIE does not have a declaration attribute. */
14881 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
14882 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
14885 /* Return the die giving the specification for DIE, if there is
14886 one. *SPEC_CU is the CU containing DIE on input, and the CU
14887 containing the return value on output. If there is no
14888 specification, but there is an abstract origin, that is
14891 static struct die_info *
14892 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
14894 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
14897 if (spec_attr == NULL)
14898 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
14900 if (spec_attr == NULL)
14903 return follow_die_ref (die, spec_attr, spec_cu);
14906 /* Free the line_header structure *LH, and any arrays and strings it
14908 NOTE: This is also used as a "cleanup" function. */
14911 free_line_header (struct line_header *lh)
14913 if (lh->standard_opcode_lengths)
14914 xfree (lh->standard_opcode_lengths);
14916 /* Remember that all the lh->file_names[i].name pointers are
14917 pointers into debug_line_buffer, and don't need to be freed. */
14918 if (lh->file_names)
14919 xfree (lh->file_names);
14921 /* Similarly for the include directory names. */
14922 if (lh->include_dirs)
14923 xfree (lh->include_dirs);
14928 /* Add an entry to LH's include directory table. */
14931 add_include_dir (struct line_header *lh, char *include_dir)
14933 /* Grow the array if necessary. */
14934 if (lh->include_dirs_size == 0)
14936 lh->include_dirs_size = 1; /* for testing */
14937 lh->include_dirs = xmalloc (lh->include_dirs_size
14938 * sizeof (*lh->include_dirs));
14940 else if (lh->num_include_dirs >= lh->include_dirs_size)
14942 lh->include_dirs_size *= 2;
14943 lh->include_dirs = xrealloc (lh->include_dirs,
14944 (lh->include_dirs_size
14945 * sizeof (*lh->include_dirs)));
14948 lh->include_dirs[lh->num_include_dirs++] = include_dir;
14951 /* Add an entry to LH's file name table. */
14954 add_file_name (struct line_header *lh,
14956 unsigned int dir_index,
14957 unsigned int mod_time,
14958 unsigned int length)
14960 struct file_entry *fe;
14962 /* Grow the array if necessary. */
14963 if (lh->file_names_size == 0)
14965 lh->file_names_size = 1; /* for testing */
14966 lh->file_names = xmalloc (lh->file_names_size
14967 * sizeof (*lh->file_names));
14969 else if (lh->num_file_names >= lh->file_names_size)
14971 lh->file_names_size *= 2;
14972 lh->file_names = xrealloc (lh->file_names,
14973 (lh->file_names_size
14974 * sizeof (*lh->file_names)));
14977 fe = &lh->file_names[lh->num_file_names++];
14979 fe->dir_index = dir_index;
14980 fe->mod_time = mod_time;
14981 fe->length = length;
14982 fe->included_p = 0;
14986 /* A convenience function to find the proper .debug_line section for a
14989 static struct dwarf2_section_info *
14990 get_debug_line_section (struct dwarf2_cu *cu)
14992 struct dwarf2_section_info *section;
14994 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14996 if (cu->dwo_unit && cu->per_cu->is_debug_types)
14997 section = &cu->dwo_unit->dwo_file->sections.line;
14998 else if (cu->per_cu->is_dwz)
15000 struct dwz_file *dwz = dwarf2_get_dwz_file ();
15002 section = &dwz->line;
15005 section = &dwarf2_per_objfile->line;
15010 /* Read the statement program header starting at OFFSET in
15011 .debug_line, or .debug_line.dwo. Return a pointer
15012 to a struct line_header, allocated using xmalloc.
15014 NOTE: the strings in the include directory and file name tables of
15015 the returned object point into the dwarf line section buffer,
15016 and must not be freed. */
15018 static struct line_header *
15019 dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu)
15021 struct cleanup *back_to;
15022 struct line_header *lh;
15023 gdb_byte *line_ptr;
15024 unsigned int bytes_read, offset_size;
15026 char *cur_dir, *cur_file;
15027 struct dwarf2_section_info *section;
15030 section = get_debug_line_section (cu);
15031 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
15032 if (section->buffer == NULL)
15034 if (cu->dwo_unit && cu->per_cu->is_debug_types)
15035 complaint (&symfile_complaints, _("missing .debug_line.dwo section"));
15037 complaint (&symfile_complaints, _("missing .debug_line section"));
15041 /* We can't do this until we know the section is non-empty.
15042 Only then do we know we have such a section. */
15043 abfd = section->asection->owner;
15045 /* Make sure that at least there's room for the total_length field.
15046 That could be 12 bytes long, but we're just going to fudge that. */
15047 if (offset + 4 >= section->size)
15049 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15053 lh = xmalloc (sizeof (*lh));
15054 memset (lh, 0, sizeof (*lh));
15055 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
15058 line_ptr = section->buffer + offset;
15060 /* Read in the header. */
15062 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
15063 &bytes_read, &offset_size);
15064 line_ptr += bytes_read;
15065 if (line_ptr + lh->total_length > (section->buffer + section->size))
15067 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15070 lh->statement_program_end = line_ptr + lh->total_length;
15071 lh->version = read_2_bytes (abfd, line_ptr);
15073 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
15074 line_ptr += offset_size;
15075 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
15077 if (lh->version >= 4)
15079 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
15083 lh->maximum_ops_per_instruction = 1;
15085 if (lh->maximum_ops_per_instruction == 0)
15087 lh->maximum_ops_per_instruction = 1;
15088 complaint (&symfile_complaints,
15089 _("invalid maximum_ops_per_instruction "
15090 "in `.debug_line' section"));
15093 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
15095 lh->line_base = read_1_signed_byte (abfd, line_ptr);
15097 lh->line_range = read_1_byte (abfd, line_ptr);
15099 lh->opcode_base = read_1_byte (abfd, line_ptr);
15101 lh->standard_opcode_lengths
15102 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
15104 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
15105 for (i = 1; i < lh->opcode_base; ++i)
15107 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
15111 /* Read directory table. */
15112 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
15114 line_ptr += bytes_read;
15115 add_include_dir (lh, cur_dir);
15117 line_ptr += bytes_read;
15119 /* Read file name table. */
15120 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
15122 unsigned int dir_index, mod_time, length;
15124 line_ptr += bytes_read;
15125 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15126 line_ptr += bytes_read;
15127 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15128 line_ptr += bytes_read;
15129 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15130 line_ptr += bytes_read;
15132 add_file_name (lh, cur_file, dir_index, mod_time, length);
15134 line_ptr += bytes_read;
15135 lh->statement_program_start = line_ptr;
15137 if (line_ptr > (section->buffer + section->size))
15138 complaint (&symfile_complaints,
15139 _("line number info header doesn't "
15140 "fit in `.debug_line' section"));
15142 discard_cleanups (back_to);
15146 /* Subroutine of dwarf_decode_lines to simplify it.
15147 Return the file name of the psymtab for included file FILE_INDEX
15148 in line header LH of PST.
15149 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15150 If space for the result is malloc'd, it will be freed by a cleanup.
15151 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
15153 The function creates dangling cleanup registration. */
15156 psymtab_include_file_name (const struct line_header *lh, int file_index,
15157 const struct partial_symtab *pst,
15158 const char *comp_dir)
15160 const struct file_entry fe = lh->file_names [file_index];
15161 char *include_name = fe.name;
15162 char *include_name_to_compare = include_name;
15163 char *dir_name = NULL;
15164 const char *pst_filename;
15165 char *copied_name = NULL;
15169 dir_name = lh->include_dirs[fe.dir_index - 1];
15171 if (!IS_ABSOLUTE_PATH (include_name)
15172 && (dir_name != NULL || comp_dir != NULL))
15174 /* Avoid creating a duplicate psymtab for PST.
15175 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15176 Before we do the comparison, however, we need to account
15177 for DIR_NAME and COMP_DIR.
15178 First prepend dir_name (if non-NULL). If we still don't
15179 have an absolute path prepend comp_dir (if non-NULL).
15180 However, the directory we record in the include-file's
15181 psymtab does not contain COMP_DIR (to match the
15182 corresponding symtab(s)).
15187 bash$ gcc -g ./hello.c
15188 include_name = "hello.c"
15190 DW_AT_comp_dir = comp_dir = "/tmp"
15191 DW_AT_name = "./hello.c" */
15193 if (dir_name != NULL)
15195 include_name = concat (dir_name, SLASH_STRING,
15196 include_name, (char *)NULL);
15197 include_name_to_compare = include_name;
15198 make_cleanup (xfree, include_name);
15200 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
15202 include_name_to_compare = concat (comp_dir, SLASH_STRING,
15203 include_name, (char *)NULL);
15207 pst_filename = pst->filename;
15208 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
15210 copied_name = concat (pst->dirname, SLASH_STRING,
15211 pst_filename, (char *)NULL);
15212 pst_filename = copied_name;
15215 file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
15217 if (include_name_to_compare != include_name)
15218 xfree (include_name_to_compare);
15219 if (copied_name != NULL)
15220 xfree (copied_name);
15224 return include_name;
15227 /* Ignore this record_line request. */
15230 noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc)
15235 /* Subroutine of dwarf_decode_lines to simplify it.
15236 Process the line number information in LH. */
15239 dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir,
15240 struct dwarf2_cu *cu, struct partial_symtab *pst)
15242 gdb_byte *line_ptr, *extended_end;
15243 gdb_byte *line_end;
15244 unsigned int bytes_read, extended_len;
15245 unsigned char op_code, extended_op, adj_opcode;
15246 CORE_ADDR baseaddr;
15247 struct objfile *objfile = cu->objfile;
15248 bfd *abfd = objfile->obfd;
15249 struct gdbarch *gdbarch = get_objfile_arch (objfile);
15250 const int decode_for_pst_p = (pst != NULL);
15251 struct subfile *last_subfile = NULL;
15252 void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc)
15255 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
15257 line_ptr = lh->statement_program_start;
15258 line_end = lh->statement_program_end;
15260 /* Read the statement sequences until there's nothing left. */
15261 while (line_ptr < line_end)
15263 /* state machine registers */
15264 CORE_ADDR address = 0;
15265 unsigned int file = 1;
15266 unsigned int line = 1;
15267 unsigned int column = 0;
15268 int is_stmt = lh->default_is_stmt;
15269 int basic_block = 0;
15270 int end_sequence = 0;
15272 unsigned char op_index = 0;
15274 if (!decode_for_pst_p && lh->num_file_names >= file)
15276 /* Start a subfile for the current file of the state machine. */
15277 /* lh->include_dirs and lh->file_names are 0-based, but the
15278 directory and file name numbers in the statement program
15280 struct file_entry *fe = &lh->file_names[file - 1];
15284 dir = lh->include_dirs[fe->dir_index - 1];
15286 dwarf2_start_subfile (fe->name, dir, comp_dir);
15289 /* Decode the table. */
15290 while (!end_sequence)
15292 op_code = read_1_byte (abfd, line_ptr);
15294 if (line_ptr > line_end)
15296 dwarf2_debug_line_missing_end_sequence_complaint ();
15300 if (op_code >= lh->opcode_base)
15302 /* Special operand. */
15303 adj_opcode = op_code - lh->opcode_base;
15304 address += (((op_index + (adj_opcode / lh->line_range))
15305 / lh->maximum_ops_per_instruction)
15306 * lh->minimum_instruction_length);
15307 op_index = ((op_index + (adj_opcode / lh->line_range))
15308 % lh->maximum_ops_per_instruction);
15309 line += lh->line_base + (adj_opcode % lh->line_range);
15310 if (lh->num_file_names < file || file == 0)
15311 dwarf2_debug_line_missing_file_complaint ();
15312 /* For now we ignore lines not starting on an
15313 instruction boundary. */
15314 else if (op_index == 0)
15316 lh->file_names[file - 1].included_p = 1;
15317 if (!decode_for_pst_p && is_stmt)
15319 if (last_subfile != current_subfile)
15321 addr = gdbarch_addr_bits_remove (gdbarch, address);
15323 (*p_record_line) (last_subfile, 0, addr);
15324 last_subfile = current_subfile;
15326 /* Append row to matrix using current values. */
15327 addr = gdbarch_addr_bits_remove (gdbarch, address);
15328 (*p_record_line) (current_subfile, line, addr);
15333 else switch (op_code)
15335 case DW_LNS_extended_op:
15336 extended_len = read_unsigned_leb128 (abfd, line_ptr,
15338 line_ptr += bytes_read;
15339 extended_end = line_ptr + extended_len;
15340 extended_op = read_1_byte (abfd, line_ptr);
15342 switch (extended_op)
15344 case DW_LNE_end_sequence:
15345 p_record_line = record_line;
15348 case DW_LNE_set_address:
15349 address = read_address (abfd, line_ptr, cu, &bytes_read);
15351 if (address == 0 && !dwarf2_per_objfile->has_section_at_zero)
15353 /* This line table is for a function which has been
15354 GCd by the linker. Ignore it. PR gdb/12528 */
15357 = line_ptr - get_debug_line_section (cu)->buffer;
15359 complaint (&symfile_complaints,
15360 _(".debug_line address at offset 0x%lx is 0 "
15362 line_offset, objfile->name);
15363 p_record_line = noop_record_line;
15367 line_ptr += bytes_read;
15368 address += baseaddr;
15370 case DW_LNE_define_file:
15373 unsigned int dir_index, mod_time, length;
15375 cur_file = read_direct_string (abfd, line_ptr,
15377 line_ptr += bytes_read;
15379 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15380 line_ptr += bytes_read;
15382 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15383 line_ptr += bytes_read;
15385 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15386 line_ptr += bytes_read;
15387 add_file_name (lh, cur_file, dir_index, mod_time, length);
15390 case DW_LNE_set_discriminator:
15391 /* The discriminator is not interesting to the debugger;
15393 line_ptr = extended_end;
15396 complaint (&symfile_complaints,
15397 _("mangled .debug_line section"));
15400 /* Make sure that we parsed the extended op correctly. If e.g.
15401 we expected a different address size than the producer used,
15402 we may have read the wrong number of bytes. */
15403 if (line_ptr != extended_end)
15405 complaint (&symfile_complaints,
15406 _("mangled .debug_line section"));
15411 if (lh->num_file_names < file || file == 0)
15412 dwarf2_debug_line_missing_file_complaint ();
15415 lh->file_names[file - 1].included_p = 1;
15416 if (!decode_for_pst_p && is_stmt)
15418 if (last_subfile != current_subfile)
15420 addr = gdbarch_addr_bits_remove (gdbarch, address);
15422 (*p_record_line) (last_subfile, 0, addr);
15423 last_subfile = current_subfile;
15425 addr = gdbarch_addr_bits_remove (gdbarch, address);
15426 (*p_record_line) (current_subfile, line, addr);
15431 case DW_LNS_advance_pc:
15434 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15436 address += (((op_index + adjust)
15437 / lh->maximum_ops_per_instruction)
15438 * lh->minimum_instruction_length);
15439 op_index = ((op_index + adjust)
15440 % lh->maximum_ops_per_instruction);
15441 line_ptr += bytes_read;
15444 case DW_LNS_advance_line:
15445 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
15446 line_ptr += bytes_read;
15448 case DW_LNS_set_file:
15450 /* The arrays lh->include_dirs and lh->file_names are
15451 0-based, but the directory and file name numbers in
15452 the statement program are 1-based. */
15453 struct file_entry *fe;
15456 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15457 line_ptr += bytes_read;
15458 if (lh->num_file_names < file || file == 0)
15459 dwarf2_debug_line_missing_file_complaint ();
15462 fe = &lh->file_names[file - 1];
15464 dir = lh->include_dirs[fe->dir_index - 1];
15465 if (!decode_for_pst_p)
15467 last_subfile = current_subfile;
15468 dwarf2_start_subfile (fe->name, dir, comp_dir);
15473 case DW_LNS_set_column:
15474 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15475 line_ptr += bytes_read;
15477 case DW_LNS_negate_stmt:
15478 is_stmt = (!is_stmt);
15480 case DW_LNS_set_basic_block:
15483 /* Add to the address register of the state machine the
15484 address increment value corresponding to special opcode
15485 255. I.e., this value is scaled by the minimum
15486 instruction length since special opcode 255 would have
15487 scaled the increment. */
15488 case DW_LNS_const_add_pc:
15490 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
15492 address += (((op_index + adjust)
15493 / lh->maximum_ops_per_instruction)
15494 * lh->minimum_instruction_length);
15495 op_index = ((op_index + adjust)
15496 % lh->maximum_ops_per_instruction);
15499 case DW_LNS_fixed_advance_pc:
15500 address += read_2_bytes (abfd, line_ptr);
15506 /* Unknown standard opcode, ignore it. */
15509 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
15511 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
15512 line_ptr += bytes_read;
15517 if (lh->num_file_names < file || file == 0)
15518 dwarf2_debug_line_missing_file_complaint ();
15521 lh->file_names[file - 1].included_p = 1;
15522 if (!decode_for_pst_p)
15524 addr = gdbarch_addr_bits_remove (gdbarch, address);
15525 (*p_record_line) (current_subfile, 0, addr);
15531 /* Decode the Line Number Program (LNP) for the given line_header
15532 structure and CU. The actual information extracted and the type
15533 of structures created from the LNP depends on the value of PST.
15535 1. If PST is NULL, then this procedure uses the data from the program
15536 to create all necessary symbol tables, and their linetables.
15538 2. If PST is not NULL, this procedure reads the program to determine
15539 the list of files included by the unit represented by PST, and
15540 builds all the associated partial symbol tables.
15542 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15543 It is used for relative paths in the line table.
15544 NOTE: When processing partial symtabs (pst != NULL),
15545 comp_dir == pst->dirname.
15547 NOTE: It is important that psymtabs have the same file name (via strcmp)
15548 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15549 symtab we don't use it in the name of the psymtabs we create.
15550 E.g. expand_line_sal requires this when finding psymtabs to expand.
15551 A good testcase for this is mb-inline.exp. */
15554 dwarf_decode_lines (struct line_header *lh, const char *comp_dir,
15555 struct dwarf2_cu *cu, struct partial_symtab *pst,
15556 int want_line_info)
15558 struct objfile *objfile = cu->objfile;
15559 const int decode_for_pst_p = (pst != NULL);
15560 struct subfile *first_subfile = current_subfile;
15562 if (want_line_info)
15563 dwarf_decode_lines_1 (lh, comp_dir, cu, pst);
15565 if (decode_for_pst_p)
15569 /* Now that we're done scanning the Line Header Program, we can
15570 create the psymtab of each included file. */
15571 for (file_index = 0; file_index < lh->num_file_names; file_index++)
15572 if (lh->file_names[file_index].included_p == 1)
15574 char *include_name =
15575 psymtab_include_file_name (lh, file_index, pst, comp_dir);
15576 if (include_name != NULL)
15577 dwarf2_create_include_psymtab (include_name, pst, objfile);
15582 /* Make sure a symtab is created for every file, even files
15583 which contain only variables (i.e. no code with associated
15587 for (i = 0; i < lh->num_file_names; i++)
15590 struct file_entry *fe;
15592 fe = &lh->file_names[i];
15594 dir = lh->include_dirs[fe->dir_index - 1];
15595 dwarf2_start_subfile (fe->name, dir, comp_dir);
15597 /* Skip the main file; we don't need it, and it must be
15598 allocated last, so that it will show up before the
15599 non-primary symtabs in the objfile's symtab list. */
15600 if (current_subfile == first_subfile)
15603 if (current_subfile->symtab == NULL)
15604 current_subfile->symtab = allocate_symtab (current_subfile->name,
15606 fe->symtab = current_subfile->symtab;
15611 /* Start a subfile for DWARF. FILENAME is the name of the file and
15612 DIRNAME the name of the source directory which contains FILENAME
15613 or NULL if not known. COMP_DIR is the compilation directory for the
15614 linetable's compilation unit or NULL if not known.
15615 This routine tries to keep line numbers from identical absolute and
15616 relative file names in a common subfile.
15618 Using the `list' example from the GDB testsuite, which resides in
15619 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15620 of /srcdir/list0.c yields the following debugging information for list0.c:
15622 DW_AT_name: /srcdir/list0.c
15623 DW_AT_comp_dir: /compdir
15624 files.files[0].name: list0.h
15625 files.files[0].dir: /srcdir
15626 files.files[1].name: list0.c
15627 files.files[1].dir: /srcdir
15629 The line number information for list0.c has to end up in a single
15630 subfile, so that `break /srcdir/list0.c:1' works as expected.
15631 start_subfile will ensure that this happens provided that we pass the
15632 concatenation of files.files[1].dir and files.files[1].name as the
15636 dwarf2_start_subfile (char *filename, const char *dirname,
15637 const char *comp_dir)
15641 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15642 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15643 second argument to start_subfile. To be consistent, we do the
15644 same here. In order not to lose the line information directory,
15645 we concatenate it to the filename when it makes sense.
15646 Note that the Dwarf3 standard says (speaking of filenames in line
15647 information): ``The directory index is ignored for file names
15648 that represent full path names''. Thus ignoring dirname in the
15649 `else' branch below isn't an issue. */
15651 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
15652 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
15654 fullname = filename;
15656 start_subfile (fullname, comp_dir);
15658 if (fullname != filename)
15662 /* Start a symtab for DWARF.
15663 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15666 dwarf2_start_symtab (struct dwarf2_cu *cu,
15667 const char *name, const char *comp_dir, CORE_ADDR low_pc)
15669 start_symtab (name, comp_dir, low_pc);
15670 record_debugformat ("DWARF 2");
15671 record_producer (cu->producer);
15673 /* We assume that we're processing GCC output. */
15674 processing_gcc_compilation = 2;
15676 cu->processing_has_namespace_info = 0;
15680 var_decode_location (struct attribute *attr, struct symbol *sym,
15681 struct dwarf2_cu *cu)
15683 struct objfile *objfile = cu->objfile;
15684 struct comp_unit_head *cu_header = &cu->header;
15686 /* NOTE drow/2003-01-30: There used to be a comment and some special
15687 code here to turn a symbol with DW_AT_external and a
15688 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15689 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15690 with some versions of binutils) where shared libraries could have
15691 relocations against symbols in their debug information - the
15692 minimal symbol would have the right address, but the debug info
15693 would not. It's no longer necessary, because we will explicitly
15694 apply relocations when we read in the debug information now. */
15696 /* A DW_AT_location attribute with no contents indicates that a
15697 variable has been optimized away. */
15698 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
15700 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
15704 /* Handle one degenerate form of location expression specially, to
15705 preserve GDB's previous behavior when section offsets are
15706 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15707 then mark this symbol as LOC_STATIC. */
15709 if (attr_form_is_block (attr)
15710 && ((DW_BLOCK (attr)->data[0] == DW_OP_addr
15711 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size)
15712 || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index
15713 && (DW_BLOCK (attr)->size
15714 == 1 + leb128_size (&DW_BLOCK (attr)->data[1])))))
15716 unsigned int dummy;
15718 if (DW_BLOCK (attr)->data[0] == DW_OP_addr)
15719 SYMBOL_VALUE_ADDRESS (sym) =
15720 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
15722 SYMBOL_VALUE_ADDRESS (sym) =
15723 read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy);
15724 SYMBOL_CLASS (sym) = LOC_STATIC;
15725 fixup_symbol_section (sym, objfile);
15726 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
15727 SYMBOL_SECTION (sym));
15731 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15732 expression evaluator, and use LOC_COMPUTED only when necessary
15733 (i.e. when the value of a register or memory location is
15734 referenced, or a thread-local block, etc.). Then again, it might
15735 not be worthwhile. I'm assuming that it isn't unless performance
15736 or memory numbers show me otherwise. */
15738 dwarf2_symbol_mark_computed (attr, sym, cu);
15739 SYMBOL_CLASS (sym) = LOC_COMPUTED;
15741 if (SYMBOL_COMPUTED_OPS (sym) == &dwarf2_loclist_funcs)
15742 cu->has_loclist = 1;
15745 /* Given a pointer to a DWARF information entry, figure out if we need
15746 to make a symbol table entry for it, and if so, create a new entry
15747 and return a pointer to it.
15748 If TYPE is NULL, determine symbol type from the die, otherwise
15749 used the passed type.
15750 If SPACE is not NULL, use it to hold the new symbol. If it is
15751 NULL, allocate a new symbol on the objfile's obstack. */
15753 static struct symbol *
15754 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
15755 struct symbol *space)
15757 struct objfile *objfile = cu->objfile;
15758 struct symbol *sym = NULL;
15760 struct attribute *attr = NULL;
15761 struct attribute *attr2 = NULL;
15762 CORE_ADDR baseaddr;
15763 struct pending **list_to_add = NULL;
15765 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
15767 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
15769 name = dwarf2_name (die, cu);
15772 const char *linkagename;
15773 int suppress_add = 0;
15778 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
15779 OBJSTAT (objfile, n_syms++);
15781 /* Cache this symbol's name and the name's demangled form (if any). */
15782 SYMBOL_SET_LANGUAGE (sym, cu->language);
15783 linkagename = dwarf2_physname (name, die, cu);
15784 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
15786 /* Fortran does not have mangling standard and the mangling does differ
15787 between gfortran, iFort etc. */
15788 if (cu->language == language_fortran
15789 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
15790 symbol_set_demangled_name (&(sym->ginfo),
15791 dwarf2_full_name (name, die, cu),
15794 /* Default assumptions.
15795 Use the passed type or decode it from the die. */
15796 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
15797 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
15799 SYMBOL_TYPE (sym) = type;
15801 SYMBOL_TYPE (sym) = die_type (die, cu);
15802 attr = dwarf2_attr (die,
15803 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
15807 SYMBOL_LINE (sym) = DW_UNSND (attr);
15810 attr = dwarf2_attr (die,
15811 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
15815 int file_index = DW_UNSND (attr);
15817 if (cu->line_header == NULL
15818 || file_index > cu->line_header->num_file_names)
15819 complaint (&symfile_complaints,
15820 _("file index out of range"));
15821 else if (file_index > 0)
15823 struct file_entry *fe;
15825 fe = &cu->line_header->file_names[file_index - 1];
15826 SYMBOL_SYMTAB (sym) = fe->symtab;
15833 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
15836 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
15838 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
15839 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
15840 SYMBOL_CLASS (sym) = LOC_LABEL;
15841 add_symbol_to_list (sym, cu->list_in_scope);
15843 case DW_TAG_subprogram:
15844 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15846 SYMBOL_CLASS (sym) = LOC_BLOCK;
15847 attr2 = dwarf2_attr (die, DW_AT_external, cu);
15848 if ((attr2 && (DW_UNSND (attr2) != 0))
15849 || cu->language == language_ada)
15851 /* Subprograms marked external are stored as a global symbol.
15852 Ada subprograms, whether marked external or not, are always
15853 stored as a global symbol, because we want to be able to
15854 access them globally. For instance, we want to be able
15855 to break on a nested subprogram without having to
15856 specify the context. */
15857 list_to_add = &global_symbols;
15861 list_to_add = cu->list_in_scope;
15864 case DW_TAG_inlined_subroutine:
15865 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15867 SYMBOL_CLASS (sym) = LOC_BLOCK;
15868 SYMBOL_INLINED (sym) = 1;
15869 list_to_add = cu->list_in_scope;
15871 case DW_TAG_template_value_param:
15873 /* Fall through. */
15874 case DW_TAG_constant:
15875 case DW_TAG_variable:
15876 case DW_TAG_member:
15877 /* Compilation with minimal debug info may result in
15878 variables with missing type entries. Change the
15879 misleading `void' type to something sensible. */
15880 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
15882 = objfile_type (objfile)->nodebug_data_symbol;
15884 attr = dwarf2_attr (die, DW_AT_const_value, cu);
15885 /* In the case of DW_TAG_member, we should only be called for
15886 static const members. */
15887 if (die->tag == DW_TAG_member)
15889 /* dwarf2_add_field uses die_is_declaration,
15890 so we do the same. */
15891 gdb_assert (die_is_declaration (die, cu));
15896 dwarf2_const_value (attr, sym, cu);
15897 attr2 = dwarf2_attr (die, DW_AT_external, cu);
15900 if (attr2 && (DW_UNSND (attr2) != 0))
15901 list_to_add = &global_symbols;
15903 list_to_add = cu->list_in_scope;
15907 attr = dwarf2_attr (die, DW_AT_location, cu);
15910 var_decode_location (attr, sym, cu);
15911 attr2 = dwarf2_attr (die, DW_AT_external, cu);
15913 /* Fortran explicitly imports any global symbols to the local
15914 scope by DW_TAG_common_block. */
15915 if (cu->language == language_fortran && die->parent
15916 && die->parent->tag == DW_TAG_common_block)
15919 if (SYMBOL_CLASS (sym) == LOC_STATIC
15920 && SYMBOL_VALUE_ADDRESS (sym) == 0
15921 && !dwarf2_per_objfile->has_section_at_zero)
15923 /* When a static variable is eliminated by the linker,
15924 the corresponding debug information is not stripped
15925 out, but the variable address is set to null;
15926 do not add such variables into symbol table. */
15928 else if (attr2 && (DW_UNSND (attr2) != 0))
15930 /* Workaround gfortran PR debug/40040 - it uses
15931 DW_AT_location for variables in -fPIC libraries which may
15932 get overriden by other libraries/executable and get
15933 a different address. Resolve it by the minimal symbol
15934 which may come from inferior's executable using copy
15935 relocation. Make this workaround only for gfortran as for
15936 other compilers GDB cannot guess the minimal symbol
15937 Fortran mangling kind. */
15938 if (cu->language == language_fortran && die->parent
15939 && die->parent->tag == DW_TAG_module
15941 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
15942 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
15944 /* A variable with DW_AT_external is never static,
15945 but it may be block-scoped. */
15946 list_to_add = (cu->list_in_scope == &file_symbols
15947 ? &global_symbols : cu->list_in_scope);
15950 list_to_add = cu->list_in_scope;
15954 /* We do not know the address of this symbol.
15955 If it is an external symbol and we have type information
15956 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15957 The address of the variable will then be determined from
15958 the minimal symbol table whenever the variable is
15960 attr2 = dwarf2_attr (die, DW_AT_external, cu);
15962 /* Fortran explicitly imports any global symbols to the local
15963 scope by DW_TAG_common_block. */
15964 if (cu->language == language_fortran && die->parent
15965 && die->parent->tag == DW_TAG_common_block)
15967 /* SYMBOL_CLASS doesn't matter here because
15968 read_common_block is going to reset it. */
15970 list_to_add = cu->list_in_scope;
15972 else if (attr2 && (DW_UNSND (attr2) != 0)
15973 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
15975 /* A variable with DW_AT_external is never static, but it
15976 may be block-scoped. */
15977 list_to_add = (cu->list_in_scope == &file_symbols
15978 ? &global_symbols : cu->list_in_scope);
15980 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
15982 else if (!die_is_declaration (die, cu))
15984 /* Use the default LOC_OPTIMIZED_OUT class. */
15985 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
15987 list_to_add = cu->list_in_scope;
15991 case DW_TAG_formal_parameter:
15992 /* If we are inside a function, mark this as an argument. If
15993 not, we might be looking at an argument to an inlined function
15994 when we do not have enough information to show inlined frames;
15995 pretend it's a local variable in that case so that the user can
15997 if (context_stack_depth > 0
15998 && context_stack[context_stack_depth - 1].name != NULL)
15999 SYMBOL_IS_ARGUMENT (sym) = 1;
16000 attr = dwarf2_attr (die, DW_AT_location, cu);
16003 var_decode_location (attr, sym, cu);
16005 attr = dwarf2_attr (die, DW_AT_const_value, cu);
16008 dwarf2_const_value (attr, sym, cu);
16011 list_to_add = cu->list_in_scope;
16013 case DW_TAG_unspecified_parameters:
16014 /* From varargs functions; gdb doesn't seem to have any
16015 interest in this information, so just ignore it for now.
16018 case DW_TAG_template_type_param:
16020 /* Fall through. */
16021 case DW_TAG_class_type:
16022 case DW_TAG_interface_type:
16023 case DW_TAG_structure_type:
16024 case DW_TAG_union_type:
16025 case DW_TAG_set_type:
16026 case DW_TAG_enumeration_type:
16027 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
16028 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
16031 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
16032 really ever be static objects: otherwise, if you try
16033 to, say, break of a class's method and you're in a file
16034 which doesn't mention that class, it won't work unless
16035 the check for all static symbols in lookup_symbol_aux
16036 saves you. See the OtherFileClass tests in
16037 gdb.c++/namespace.exp. */
16041 list_to_add = (cu->list_in_scope == &file_symbols
16042 && (cu->language == language_cplus
16043 || cu->language == language_java)
16044 ? &global_symbols : cu->list_in_scope);
16046 /* The semantics of C++ state that "struct foo {
16047 ... }" also defines a typedef for "foo". A Java
16048 class declaration also defines a typedef for the
16050 if (cu->language == language_cplus
16051 || cu->language == language_java
16052 || cu->language == language_ada)
16054 /* The symbol's name is already allocated along
16055 with this objfile, so we don't need to
16056 duplicate it for the type. */
16057 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
16058 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
16063 case DW_TAG_typedef:
16064 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
16065 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
16066 list_to_add = cu->list_in_scope;
16068 case DW_TAG_base_type:
16069 case DW_TAG_subrange_type:
16070 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
16071 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
16072 list_to_add = cu->list_in_scope;
16074 case DW_TAG_enumerator:
16075 attr = dwarf2_attr (die, DW_AT_const_value, cu);
16078 dwarf2_const_value (attr, sym, cu);
16081 /* NOTE: carlton/2003-11-10: See comment above in the
16082 DW_TAG_class_type, etc. block. */
16084 list_to_add = (cu->list_in_scope == &file_symbols
16085 && (cu->language == language_cplus
16086 || cu->language == language_java)
16087 ? &global_symbols : cu->list_in_scope);
16090 case DW_TAG_namespace:
16091 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
16092 list_to_add = &global_symbols;
16094 case DW_TAG_common_block:
16095 SYMBOL_CLASS (sym) = LOC_COMMON_BLOCK;
16096 SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN;
16097 add_symbol_to_list (sym, cu->list_in_scope);
16100 /* Not a tag we recognize. Hopefully we aren't processing
16101 trash data, but since we must specifically ignore things
16102 we don't recognize, there is nothing else we should do at
16104 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
16105 dwarf_tag_name (die->tag));
16111 sym->hash_next = objfile->template_symbols;
16112 objfile->template_symbols = sym;
16113 list_to_add = NULL;
16116 if (list_to_add != NULL)
16117 add_symbol_to_list (sym, list_to_add);
16119 /* For the benefit of old versions of GCC, check for anonymous
16120 namespaces based on the demangled name. */
16121 if (!cu->processing_has_namespace_info
16122 && cu->language == language_cplus)
16123 cp_scan_for_anonymous_namespaces (sym, objfile);
16128 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16130 static struct symbol *
16131 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
16133 return new_symbol_full (die, type, cu, NULL);
16136 /* Given an attr with a DW_FORM_dataN value in host byte order,
16137 zero-extend it as appropriate for the symbol's type. The DWARF
16138 standard (v4) is not entirely clear about the meaning of using
16139 DW_FORM_dataN for a constant with a signed type, where the type is
16140 wider than the data. The conclusion of a discussion on the DWARF
16141 list was that this is unspecified. We choose to always zero-extend
16142 because that is the interpretation long in use by GCC. */
16145 dwarf2_const_value_data (struct attribute *attr, struct type *type,
16146 const char *name, struct obstack *obstack,
16147 struct dwarf2_cu *cu, LONGEST *value, int bits)
16149 struct objfile *objfile = cu->objfile;
16150 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
16151 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
16152 LONGEST l = DW_UNSND (attr);
16154 if (bits < sizeof (*value) * 8)
16156 l &= ((LONGEST) 1 << bits) - 1;
16159 else if (bits == sizeof (*value) * 8)
16163 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
16164 store_unsigned_integer (bytes, bits / 8, byte_order, l);
16171 /* Read a constant value from an attribute. Either set *VALUE, or if
16172 the value does not fit in *VALUE, set *BYTES - either already
16173 allocated on the objfile obstack, or newly allocated on OBSTACK,
16174 or, set *BATON, if we translated the constant to a location
16178 dwarf2_const_value_attr (struct attribute *attr, struct type *type,
16179 const char *name, struct obstack *obstack,
16180 struct dwarf2_cu *cu,
16181 LONGEST *value, gdb_byte **bytes,
16182 struct dwarf2_locexpr_baton **baton)
16184 struct objfile *objfile = cu->objfile;
16185 struct comp_unit_head *cu_header = &cu->header;
16186 struct dwarf_block *blk;
16187 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
16188 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
16194 switch (attr->form)
16197 case DW_FORM_GNU_addr_index:
16201 if (TYPE_LENGTH (type) != cu_header->addr_size)
16202 dwarf2_const_value_length_mismatch_complaint (name,
16203 cu_header->addr_size,
16204 TYPE_LENGTH (type));
16205 /* Symbols of this form are reasonably rare, so we just
16206 piggyback on the existing location code rather than writing
16207 a new implementation of symbol_computed_ops. */
16208 *baton = obstack_alloc (&objfile->objfile_obstack,
16209 sizeof (struct dwarf2_locexpr_baton));
16210 (*baton)->per_cu = cu->per_cu;
16211 gdb_assert ((*baton)->per_cu);
16213 (*baton)->size = 2 + cu_header->addr_size;
16214 data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
16215 (*baton)->data = data;
16217 data[0] = DW_OP_addr;
16218 store_unsigned_integer (&data[1], cu_header->addr_size,
16219 byte_order, DW_ADDR (attr));
16220 data[cu_header->addr_size + 1] = DW_OP_stack_value;
16223 case DW_FORM_string:
16225 case DW_FORM_GNU_str_index:
16226 case DW_FORM_GNU_strp_alt:
16227 /* DW_STRING is already allocated on the objfile obstack, point
16229 *bytes = (gdb_byte *) DW_STRING (attr);
16231 case DW_FORM_block1:
16232 case DW_FORM_block2:
16233 case DW_FORM_block4:
16234 case DW_FORM_block:
16235 case DW_FORM_exprloc:
16236 blk = DW_BLOCK (attr);
16237 if (TYPE_LENGTH (type) != blk->size)
16238 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
16239 TYPE_LENGTH (type));
16240 *bytes = blk->data;
16243 /* The DW_AT_const_value attributes are supposed to carry the
16244 symbol's value "represented as it would be on the target
16245 architecture." By the time we get here, it's already been
16246 converted to host endianness, so we just need to sign- or
16247 zero-extend it as appropriate. */
16248 case DW_FORM_data1:
16249 *bytes = dwarf2_const_value_data (attr, type, name,
16250 obstack, cu, value, 8);
16252 case DW_FORM_data2:
16253 *bytes = dwarf2_const_value_data (attr, type, name,
16254 obstack, cu, value, 16);
16256 case DW_FORM_data4:
16257 *bytes = dwarf2_const_value_data (attr, type, name,
16258 obstack, cu, value, 32);
16260 case DW_FORM_data8:
16261 *bytes = dwarf2_const_value_data (attr, type, name,
16262 obstack, cu, value, 64);
16265 case DW_FORM_sdata:
16266 *value = DW_SND (attr);
16269 case DW_FORM_udata:
16270 *value = DW_UNSND (attr);
16274 complaint (&symfile_complaints,
16275 _("unsupported const value attribute form: '%s'"),
16276 dwarf_form_name (attr->form));
16283 /* Copy constant value from an attribute to a symbol. */
16286 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
16287 struct dwarf2_cu *cu)
16289 struct objfile *objfile = cu->objfile;
16290 struct comp_unit_head *cu_header = &cu->header;
16293 struct dwarf2_locexpr_baton *baton;
16295 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
16296 SYMBOL_PRINT_NAME (sym),
16297 &objfile->objfile_obstack, cu,
16298 &value, &bytes, &baton);
16302 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
16303 SYMBOL_LOCATION_BATON (sym) = baton;
16304 SYMBOL_CLASS (sym) = LOC_COMPUTED;
16306 else if (bytes != NULL)
16308 SYMBOL_VALUE_BYTES (sym) = bytes;
16309 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
16313 SYMBOL_VALUE (sym) = value;
16314 SYMBOL_CLASS (sym) = LOC_CONST;
16318 /* Return the type of the die in question using its DW_AT_type attribute. */
16320 static struct type *
16321 die_type (struct die_info *die, struct dwarf2_cu *cu)
16323 struct attribute *type_attr;
16325 type_attr = dwarf2_attr (die, DW_AT_type, cu);
16328 /* A missing DW_AT_type represents a void type. */
16329 return objfile_type (cu->objfile)->builtin_void;
16332 return lookup_die_type (die, type_attr, cu);
16335 /* True iff CU's producer generates GNAT Ada auxiliary information
16336 that allows to find parallel types through that information instead
16337 of having to do expensive parallel lookups by type name. */
16340 need_gnat_info (struct dwarf2_cu *cu)
16342 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16343 of GNAT produces this auxiliary information, without any indication
16344 that it is produced. Part of enhancing the FSF version of GNAT
16345 to produce that information will be to put in place an indicator
16346 that we can use in order to determine whether the descriptive type
16347 info is available or not. One suggestion that has been made is
16348 to use a new attribute, attached to the CU die. For now, assume
16349 that the descriptive type info is not available. */
16353 /* Return the auxiliary type of the die in question using its
16354 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16355 attribute is not present. */
16357 static struct type *
16358 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
16360 struct attribute *type_attr;
16362 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
16366 return lookup_die_type (die, type_attr, cu);
16369 /* If DIE has a descriptive_type attribute, then set the TYPE's
16370 descriptive type accordingly. */
16373 set_descriptive_type (struct type *type, struct die_info *die,
16374 struct dwarf2_cu *cu)
16376 struct type *descriptive_type = die_descriptive_type (die, cu);
16378 if (descriptive_type)
16380 ALLOCATE_GNAT_AUX_TYPE (type);
16381 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
16385 /* Return the containing type of the die in question using its
16386 DW_AT_containing_type attribute. */
16388 static struct type *
16389 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
16391 struct attribute *type_attr;
16393 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
16395 error (_("Dwarf Error: Problem turning containing type into gdb type "
16396 "[in module %s]"), cu->objfile->name);
16398 return lookup_die_type (die, type_attr, cu);
16401 /* Look up the type of DIE in CU using its type attribute ATTR.
16402 If there is no type substitute an error marker. */
16404 static struct type *
16405 lookup_die_type (struct die_info *die, struct attribute *attr,
16406 struct dwarf2_cu *cu)
16408 struct objfile *objfile = cu->objfile;
16409 struct type *this_type;
16411 /* First see if we have it cached. */
16413 if (attr->form == DW_FORM_GNU_ref_alt)
16415 struct dwarf2_per_cu_data *per_cu;
16416 sect_offset offset = dwarf2_get_ref_die_offset (attr);
16418 per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile);
16419 this_type = get_die_type_at_offset (offset, per_cu);
16421 else if (is_ref_attr (attr))
16423 sect_offset offset = dwarf2_get_ref_die_offset (attr);
16425 this_type = get_die_type_at_offset (offset, cu->per_cu);
16427 else if (attr->form == DW_FORM_ref_sig8)
16429 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
16431 /* sig_type will be NULL if the signatured type is missing from
16433 if (sig_type == NULL)
16434 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16435 "at 0x%x [in module %s]"),
16436 die->offset.sect_off, objfile->name);
16438 gdb_assert (sig_type->per_cu.is_debug_types);
16439 /* If we haven't filled in type_offset_in_section yet, then we
16440 haven't read the type in yet. */
16442 if (sig_type->type_offset_in_section.sect_off != 0)
16445 get_die_type_at_offset (sig_type->type_offset_in_section,
16446 &sig_type->per_cu);
16451 dump_die_for_error (die);
16452 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16453 dwarf_attr_name (attr->name), objfile->name);
16456 /* If not cached we need to read it in. */
16458 if (this_type == NULL)
16460 struct die_info *type_die;
16461 struct dwarf2_cu *type_cu = cu;
16463 type_die = follow_die_ref_or_sig (die, attr, &type_cu);
16464 /* If we found the type now, it's probably because the type came
16465 from an inter-CU reference and the type's CU got expanded before
16467 this_type = get_die_type (type_die, type_cu);
16468 if (this_type == NULL)
16469 this_type = read_type_die_1 (type_die, type_cu);
16472 /* If we still don't have a type use an error marker. */
16474 if (this_type == NULL)
16476 char *message, *saved;
16478 /* read_type_die already issued a complaint. */
16479 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16481 cu->header.offset.sect_off,
16482 die->offset.sect_off);
16483 saved = obstack_copy0 (&objfile->objfile_obstack,
16484 message, strlen (message));
16487 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile);
16493 /* Return the type in DIE, CU.
16494 Returns NULL for invalid types.
16496 This first does a lookup in the appropriate type_hash table,
16497 and only reads the die in if necessary.
16499 NOTE: This can be called when reading in partial or full symbols. */
16501 static struct type *
16502 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
16504 struct type *this_type;
16506 this_type = get_die_type (die, cu);
16510 return read_type_die_1 (die, cu);
16513 /* Read the type in DIE, CU.
16514 Returns NULL for invalid types. */
16516 static struct type *
16517 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
16519 struct type *this_type = NULL;
16523 case DW_TAG_class_type:
16524 case DW_TAG_interface_type:
16525 case DW_TAG_structure_type:
16526 case DW_TAG_union_type:
16527 this_type = read_structure_type (die, cu);
16529 case DW_TAG_enumeration_type:
16530 this_type = read_enumeration_type (die, cu);
16532 case DW_TAG_subprogram:
16533 case DW_TAG_subroutine_type:
16534 case DW_TAG_inlined_subroutine:
16535 this_type = read_subroutine_type (die, cu);
16537 case DW_TAG_array_type:
16538 this_type = read_array_type (die, cu);
16540 case DW_TAG_set_type:
16541 this_type = read_set_type (die, cu);
16543 case DW_TAG_pointer_type:
16544 this_type = read_tag_pointer_type (die, cu);
16546 case DW_TAG_ptr_to_member_type:
16547 this_type = read_tag_ptr_to_member_type (die, cu);
16549 case DW_TAG_reference_type:
16550 this_type = read_tag_reference_type (die, cu);
16552 case DW_TAG_const_type:
16553 this_type = read_tag_const_type (die, cu);
16555 case DW_TAG_volatile_type:
16556 this_type = read_tag_volatile_type (die, cu);
16558 case DW_TAG_restrict_type:
16559 this_type = read_tag_restrict_type (die, cu);
16561 case DW_TAG_string_type:
16562 this_type = read_tag_string_type (die, cu);
16564 case DW_TAG_typedef:
16565 this_type = read_typedef (die, cu);
16567 case DW_TAG_subrange_type:
16568 this_type = read_subrange_type (die, cu);
16570 case DW_TAG_base_type:
16571 this_type = read_base_type (die, cu);
16573 case DW_TAG_unspecified_type:
16574 this_type = read_unspecified_type (die, cu);
16576 case DW_TAG_namespace:
16577 this_type = read_namespace_type (die, cu);
16579 case DW_TAG_module:
16580 this_type = read_module_type (die, cu);
16583 complaint (&symfile_complaints,
16584 _("unexpected tag in read_type_die: '%s'"),
16585 dwarf_tag_name (die->tag));
16592 /* See if we can figure out if the class lives in a namespace. We do
16593 this by looking for a member function; its demangled name will
16594 contain namespace info, if there is any.
16595 Return the computed name or NULL.
16596 Space for the result is allocated on the objfile's obstack.
16597 This is the full-die version of guess_partial_die_structure_name.
16598 In this case we know DIE has no useful parent. */
16601 guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu)
16603 struct die_info *spec_die;
16604 struct dwarf2_cu *spec_cu;
16605 struct die_info *child;
16608 spec_die = die_specification (die, &spec_cu);
16609 if (spec_die != NULL)
16615 for (child = die->child;
16617 child = child->sibling)
16619 if (child->tag == DW_TAG_subprogram)
16621 struct attribute *attr;
16623 attr = dwarf2_attr (child, DW_AT_linkage_name, cu);
16625 attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu);
16629 = language_class_name_from_physname (cu->language_defn,
16633 if (actual_name != NULL)
16635 const char *die_name = dwarf2_name (die, cu);
16637 if (die_name != NULL
16638 && strcmp (die_name, actual_name) != 0)
16640 /* Strip off the class name from the full name.
16641 We want the prefix. */
16642 int die_name_len = strlen (die_name);
16643 int actual_name_len = strlen (actual_name);
16645 /* Test for '::' as a sanity check. */
16646 if (actual_name_len > die_name_len + 2
16647 && actual_name[actual_name_len
16648 - die_name_len - 1] == ':')
16650 obstack_copy0 (&cu->objfile->objfile_obstack,
16652 actual_name_len - die_name_len - 2);
16655 xfree (actual_name);
16664 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16665 prefix part in such case. See
16666 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16669 anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu)
16671 struct attribute *attr;
16674 if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type
16675 && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type)
16678 attr = dwarf2_attr (die, DW_AT_name, cu);
16679 if (attr != NULL && DW_STRING (attr) != NULL)
16682 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
16684 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
16685 if (attr == NULL || DW_STRING (attr) == NULL)
16688 /* dwarf2_name had to be already called. */
16689 gdb_assert (DW_STRING_IS_CANONICAL (attr));
16691 /* Strip the base name, keep any leading namespaces/classes. */
16692 base = strrchr (DW_STRING (attr), ':');
16693 if (base == NULL || base == DW_STRING (attr) || base[-1] != ':')
16696 return obstack_copy0 (&cu->objfile->objfile_obstack,
16697 DW_STRING (attr), &base[-1] - DW_STRING (attr));
16700 /* Return the name of the namespace/class that DIE is defined within,
16701 or "" if we can't tell. The caller should not xfree the result.
16703 For example, if we're within the method foo() in the following
16713 then determine_prefix on foo's die will return "N::C". */
16715 static const char *
16716 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
16718 struct die_info *parent, *spec_die;
16719 struct dwarf2_cu *spec_cu;
16720 struct type *parent_type;
16723 if (cu->language != language_cplus && cu->language != language_java
16724 && cu->language != language_fortran)
16727 retval = anonymous_struct_prefix (die, cu);
16731 /* We have to be careful in the presence of DW_AT_specification.
16732 For example, with GCC 3.4, given the code
16736 // Definition of N::foo.
16740 then we'll have a tree of DIEs like this:
16742 1: DW_TAG_compile_unit
16743 2: DW_TAG_namespace // N
16744 3: DW_TAG_subprogram // declaration of N::foo
16745 4: DW_TAG_subprogram // definition of N::foo
16746 DW_AT_specification // refers to die #3
16748 Thus, when processing die #4, we have to pretend that we're in
16749 the context of its DW_AT_specification, namely the contex of die
16752 spec_die = die_specification (die, &spec_cu);
16753 if (spec_die == NULL)
16754 parent = die->parent;
16757 parent = spec_die->parent;
16761 if (parent == NULL)
16763 else if (parent->building_fullname)
16766 const char *parent_name;
16768 /* It has been seen on RealView 2.2 built binaries,
16769 DW_TAG_template_type_param types actually _defined_ as
16770 children of the parent class:
16773 template class <class Enum> Class{};
16774 Class<enum E> class_e;
16776 1: DW_TAG_class_type (Class)
16777 2: DW_TAG_enumeration_type (E)
16778 3: DW_TAG_enumerator (enum1:0)
16779 3: DW_TAG_enumerator (enum2:1)
16781 2: DW_TAG_template_type_param
16782 DW_AT_type DW_FORM_ref_udata (E)
16784 Besides being broken debug info, it can put GDB into an
16785 infinite loop. Consider:
16787 When we're building the full name for Class<E>, we'll start
16788 at Class, and go look over its template type parameters,
16789 finding E. We'll then try to build the full name of E, and
16790 reach here. We're now trying to build the full name of E,
16791 and look over the parent DIE for containing scope. In the
16792 broken case, if we followed the parent DIE of E, we'd again
16793 find Class, and once again go look at its template type
16794 arguments, etc., etc. Simply don't consider such parent die
16795 as source-level parent of this die (it can't be, the language
16796 doesn't allow it), and break the loop here. */
16797 name = dwarf2_name (die, cu);
16798 parent_name = dwarf2_name (parent, cu);
16799 complaint (&symfile_complaints,
16800 _("template param type '%s' defined within parent '%s'"),
16801 name ? name : "<unknown>",
16802 parent_name ? parent_name : "<unknown>");
16806 switch (parent->tag)
16808 case DW_TAG_namespace:
16809 parent_type = read_type_die (parent, cu);
16810 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16811 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16812 Work around this problem here. */
16813 if (cu->language == language_cplus
16814 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
16816 /* We give a name to even anonymous namespaces. */
16817 return TYPE_TAG_NAME (parent_type);
16818 case DW_TAG_class_type:
16819 case DW_TAG_interface_type:
16820 case DW_TAG_structure_type:
16821 case DW_TAG_union_type:
16822 case DW_TAG_module:
16823 parent_type = read_type_die (parent, cu);
16824 if (TYPE_TAG_NAME (parent_type) != NULL)
16825 return TYPE_TAG_NAME (parent_type);
16827 /* An anonymous structure is only allowed non-static data
16828 members; no typedefs, no member functions, et cetera.
16829 So it does not need a prefix. */
16831 case DW_TAG_compile_unit:
16832 case DW_TAG_partial_unit:
16833 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16834 if (cu->language == language_cplus
16835 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
16836 && die->child != NULL
16837 && (die->tag == DW_TAG_class_type
16838 || die->tag == DW_TAG_structure_type
16839 || die->tag == DW_TAG_union_type))
16841 char *name = guess_full_die_structure_name (die, cu);
16847 return determine_prefix (parent, cu);
16851 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16852 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16853 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16854 an obconcat, otherwise allocate storage for the result. The CU argument is
16855 used to determine the language and hence, the appropriate separator. */
16857 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16860 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
16861 int physname, struct dwarf2_cu *cu)
16863 const char *lead = "";
16866 if (suffix == NULL || suffix[0] == '\0'
16867 || prefix == NULL || prefix[0] == '\0')
16869 else if (cu->language == language_java)
16871 else if (cu->language == language_fortran && physname)
16873 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16874 DW_AT_MIPS_linkage_name is preferred and used instead. */
16882 if (prefix == NULL)
16884 if (suffix == NULL)
16890 = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
16892 strcpy (retval, lead);
16893 strcat (retval, prefix);
16894 strcat (retval, sep);
16895 strcat (retval, suffix);
16900 /* We have an obstack. */
16901 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
16905 /* Return sibling of die, NULL if no sibling. */
16907 static struct die_info *
16908 sibling_die (struct die_info *die)
16910 return die->sibling;
16913 /* Get name of a die, return NULL if not found. */
16915 static const char *
16916 dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu,
16917 struct obstack *obstack)
16919 if (name && cu->language == language_cplus)
16921 char *canon_name = cp_canonicalize_string (name);
16923 if (canon_name != NULL)
16925 if (strcmp (canon_name, name) != 0)
16926 name = obstack_copy0 (obstack, canon_name, strlen (canon_name));
16927 xfree (canon_name);
16934 /* Get name of a die, return NULL if not found. */
16936 static const char *
16937 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
16939 struct attribute *attr;
16941 attr = dwarf2_attr (die, DW_AT_name, cu);
16942 if ((!attr || !DW_STRING (attr))
16943 && die->tag != DW_TAG_class_type
16944 && die->tag != DW_TAG_interface_type
16945 && die->tag != DW_TAG_structure_type
16946 && die->tag != DW_TAG_union_type)
16951 case DW_TAG_compile_unit:
16952 case DW_TAG_partial_unit:
16953 /* Compilation units have a DW_AT_name that is a filename, not
16954 a source language identifier. */
16955 case DW_TAG_enumeration_type:
16956 case DW_TAG_enumerator:
16957 /* These tags always have simple identifiers already; no need
16958 to canonicalize them. */
16959 return DW_STRING (attr);
16961 case DW_TAG_subprogram:
16962 /* Java constructors will all be named "<init>", so return
16963 the class name when we see this special case. */
16964 if (cu->language == language_java
16965 && DW_STRING (attr) != NULL
16966 && strcmp (DW_STRING (attr), "<init>") == 0)
16968 struct dwarf2_cu *spec_cu = cu;
16969 struct die_info *spec_die;
16971 /* GCJ will output '<init>' for Java constructor names.
16972 For this special case, return the name of the parent class. */
16974 /* GCJ may output suprogram DIEs with AT_specification set.
16975 If so, use the name of the specified DIE. */
16976 spec_die = die_specification (die, &spec_cu);
16977 if (spec_die != NULL)
16978 return dwarf2_name (spec_die, spec_cu);
16983 if (die->tag == DW_TAG_class_type)
16984 return dwarf2_name (die, cu);
16986 while (die->tag != DW_TAG_compile_unit
16987 && die->tag != DW_TAG_partial_unit);
16991 case DW_TAG_class_type:
16992 case DW_TAG_interface_type:
16993 case DW_TAG_structure_type:
16994 case DW_TAG_union_type:
16995 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16996 structures or unions. These were of the form "._%d" in GCC 4.1,
16997 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16998 and GCC 4.4. We work around this problem by ignoring these. */
16999 if (attr && DW_STRING (attr)
17000 && (strncmp (DW_STRING (attr), "._", 2) == 0
17001 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0))
17004 /* GCC might emit a nameless typedef that has a linkage name. See
17005 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
17006 if (!attr || DW_STRING (attr) == NULL)
17008 char *demangled = NULL;
17010 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
17012 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
17014 if (attr == NULL || DW_STRING (attr) == NULL)
17017 /* Avoid demangling DW_STRING (attr) the second time on a second
17018 call for the same DIE. */
17019 if (!DW_STRING_IS_CANONICAL (attr))
17020 demangled = cplus_demangle (DW_STRING (attr), DMGL_TYPES);
17026 /* FIXME: we already did this for the partial symbol... */
17027 DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack,
17028 demangled, strlen (demangled));
17029 DW_STRING_IS_CANONICAL (attr) = 1;
17032 /* Strip any leading namespaces/classes, keep only the base name.
17033 DW_AT_name for named DIEs does not contain the prefixes. */
17034 base = strrchr (DW_STRING (attr), ':');
17035 if (base && base > DW_STRING (attr) && base[-1] == ':')
17038 return DW_STRING (attr);
17047 if (!DW_STRING_IS_CANONICAL (attr))
17050 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
17051 &cu->objfile->objfile_obstack);
17052 DW_STRING_IS_CANONICAL (attr) = 1;
17054 return DW_STRING (attr);
17057 /* Return the die that this die in an extension of, or NULL if there
17058 is none. *EXT_CU is the CU containing DIE on input, and the CU
17059 containing the return value on output. */
17061 static struct die_info *
17062 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
17064 struct attribute *attr;
17066 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
17070 return follow_die_ref (die, attr, ext_cu);
17073 /* Convert a DIE tag into its string name. */
17075 static const char *
17076 dwarf_tag_name (unsigned tag)
17078 const char *name = get_DW_TAG_name (tag);
17081 return "DW_TAG_<unknown>";
17086 /* Convert a DWARF attribute code into its string name. */
17088 static const char *
17089 dwarf_attr_name (unsigned attr)
17093 #ifdef MIPS /* collides with DW_AT_HP_block_index */
17094 if (attr == DW_AT_MIPS_fde)
17095 return "DW_AT_MIPS_fde";
17097 if (attr == DW_AT_HP_block_index)
17098 return "DW_AT_HP_block_index";
17101 name = get_DW_AT_name (attr);
17104 return "DW_AT_<unknown>";
17109 /* Convert a DWARF value form code into its string name. */
17111 static const char *
17112 dwarf_form_name (unsigned form)
17114 const char *name = get_DW_FORM_name (form);
17117 return "DW_FORM_<unknown>";
17123 dwarf_bool_name (unsigned mybool)
17131 /* Convert a DWARF type code into its string name. */
17133 static const char *
17134 dwarf_type_encoding_name (unsigned enc)
17136 const char *name = get_DW_ATE_name (enc);
17139 return "DW_ATE_<unknown>";
17145 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
17149 print_spaces (indent, f);
17150 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
17151 dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off);
17153 if (die->parent != NULL)
17155 print_spaces (indent, f);
17156 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
17157 die->parent->offset.sect_off);
17160 print_spaces (indent, f);
17161 fprintf_unfiltered (f, " has children: %s\n",
17162 dwarf_bool_name (die->child != NULL));
17164 print_spaces (indent, f);
17165 fprintf_unfiltered (f, " attributes:\n");
17167 for (i = 0; i < die->num_attrs; ++i)
17169 print_spaces (indent, f);
17170 fprintf_unfiltered (f, " %s (%s) ",
17171 dwarf_attr_name (die->attrs[i].name),
17172 dwarf_form_name (die->attrs[i].form));
17174 switch (die->attrs[i].form)
17177 case DW_FORM_GNU_addr_index:
17178 fprintf_unfiltered (f, "address: ");
17179 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
17181 case DW_FORM_block2:
17182 case DW_FORM_block4:
17183 case DW_FORM_block:
17184 case DW_FORM_block1:
17185 fprintf_unfiltered (f, "block: size %s",
17186 pulongest (DW_BLOCK (&die->attrs[i])->size));
17188 case DW_FORM_exprloc:
17189 fprintf_unfiltered (f, "expression: size %s",
17190 pulongest (DW_BLOCK (&die->attrs[i])->size));
17192 case DW_FORM_ref_addr:
17193 fprintf_unfiltered (f, "ref address: ");
17194 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
17196 case DW_FORM_GNU_ref_alt:
17197 fprintf_unfiltered (f, "alt ref address: ");
17198 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
17204 case DW_FORM_ref_udata:
17205 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
17206 (long) (DW_UNSND (&die->attrs[i])));
17208 case DW_FORM_data1:
17209 case DW_FORM_data2:
17210 case DW_FORM_data4:
17211 case DW_FORM_data8:
17212 case DW_FORM_udata:
17213 case DW_FORM_sdata:
17214 fprintf_unfiltered (f, "constant: %s",
17215 pulongest (DW_UNSND (&die->attrs[i])));
17217 case DW_FORM_sec_offset:
17218 fprintf_unfiltered (f, "section offset: %s",
17219 pulongest (DW_UNSND (&die->attrs[i])));
17221 case DW_FORM_ref_sig8:
17222 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
17223 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
17224 DW_SIGNATURED_TYPE (&die->attrs[i])->per_cu.offset.sect_off);
17226 fprintf_unfiltered (f, "signatured type, offset: unknown");
17228 case DW_FORM_string:
17230 case DW_FORM_GNU_str_index:
17231 case DW_FORM_GNU_strp_alt:
17232 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
17233 DW_STRING (&die->attrs[i])
17234 ? DW_STRING (&die->attrs[i]) : "",
17235 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
17238 if (DW_UNSND (&die->attrs[i]))
17239 fprintf_unfiltered (f, "flag: TRUE");
17241 fprintf_unfiltered (f, "flag: FALSE");
17243 case DW_FORM_flag_present:
17244 fprintf_unfiltered (f, "flag: TRUE");
17246 case DW_FORM_indirect:
17247 /* The reader will have reduced the indirect form to
17248 the "base form" so this form should not occur. */
17249 fprintf_unfiltered (f,
17250 "unexpected attribute form: DW_FORM_indirect");
17253 fprintf_unfiltered (f, "unsupported attribute form: %d.",
17254 die->attrs[i].form);
17257 fprintf_unfiltered (f, "\n");
17262 dump_die_for_error (struct die_info *die)
17264 dump_die_shallow (gdb_stderr, 0, die);
17268 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
17270 int indent = level * 4;
17272 gdb_assert (die != NULL);
17274 if (level >= max_level)
17277 dump_die_shallow (f, indent, die);
17279 if (die->child != NULL)
17281 print_spaces (indent, f);
17282 fprintf_unfiltered (f, " Children:");
17283 if (level + 1 < max_level)
17285 fprintf_unfiltered (f, "\n");
17286 dump_die_1 (f, level + 1, max_level, die->child);
17290 fprintf_unfiltered (f,
17291 " [not printed, max nesting level reached]\n");
17295 if (die->sibling != NULL && level > 0)
17297 dump_die_1 (f, level, max_level, die->sibling);
17301 /* This is called from the pdie macro in gdbinit.in.
17302 It's not static so gcc will keep a copy callable from gdb. */
17305 dump_die (struct die_info *die, int max_level)
17307 dump_die_1 (gdb_stdlog, 0, max_level, die);
17311 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
17315 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off,
17321 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17322 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17325 is_ref_attr (struct attribute *attr)
17327 switch (attr->form)
17329 case DW_FORM_ref_addr:
17334 case DW_FORM_ref_udata:
17335 case DW_FORM_GNU_ref_alt:
17342 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17346 dwarf2_get_ref_die_offset (struct attribute *attr)
17348 sect_offset retval = { DW_UNSND (attr) };
17350 if (is_ref_attr (attr))
17353 retval.sect_off = 0;
17354 complaint (&symfile_complaints,
17355 _("unsupported die ref attribute form: '%s'"),
17356 dwarf_form_name (attr->form));
17360 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17361 * the value held by the attribute is not constant. */
17364 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
17366 if (attr->form == DW_FORM_sdata)
17367 return DW_SND (attr);
17368 else if (attr->form == DW_FORM_udata
17369 || attr->form == DW_FORM_data1
17370 || attr->form == DW_FORM_data2
17371 || attr->form == DW_FORM_data4
17372 || attr->form == DW_FORM_data8)
17373 return DW_UNSND (attr);
17376 complaint (&symfile_complaints,
17377 _("Attribute value is not a constant (%s)"),
17378 dwarf_form_name (attr->form));
17379 return default_value;
17383 /* Follow reference or signature attribute ATTR of SRC_DIE.
17384 On entry *REF_CU is the CU of SRC_DIE.
17385 On exit *REF_CU is the CU of the result. */
17387 static struct die_info *
17388 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
17389 struct dwarf2_cu **ref_cu)
17391 struct die_info *die;
17393 if (is_ref_attr (attr))
17394 die = follow_die_ref (src_die, attr, ref_cu);
17395 else if (attr->form == DW_FORM_ref_sig8)
17396 die = follow_die_sig (src_die, attr, ref_cu);
17399 dump_die_for_error (src_die);
17400 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17401 (*ref_cu)->objfile->name);
17407 /* Follow reference OFFSET.
17408 On entry *REF_CU is the CU of the source die referencing OFFSET.
17409 On exit *REF_CU is the CU of the result.
17410 Returns NULL if OFFSET is invalid. */
17412 static struct die_info *
17413 follow_die_offset (sect_offset offset, int offset_in_dwz,
17414 struct dwarf2_cu **ref_cu)
17416 struct die_info temp_die;
17417 struct dwarf2_cu *target_cu, *cu = *ref_cu;
17419 gdb_assert (cu->per_cu != NULL);
17423 if (cu->per_cu->is_debug_types)
17425 /* .debug_types CUs cannot reference anything outside their CU.
17426 If they need to, they have to reference a signatured type via
17427 DW_FORM_ref_sig8. */
17428 if (! offset_in_cu_p (&cu->header, offset))
17431 else if (offset_in_dwz != cu->per_cu->is_dwz
17432 || ! offset_in_cu_p (&cu->header, offset))
17434 struct dwarf2_per_cu_data *per_cu;
17436 per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz,
17439 /* If necessary, add it to the queue and load its DIEs. */
17440 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
17441 load_full_comp_unit (per_cu, cu->language);
17443 target_cu = per_cu->cu;
17445 else if (cu->dies == NULL)
17447 /* We're loading full DIEs during partial symbol reading. */
17448 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
17449 load_full_comp_unit (cu->per_cu, language_minimal);
17452 *ref_cu = target_cu;
17453 temp_die.offset = offset;
17454 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off);
17457 /* Follow reference attribute ATTR of SRC_DIE.
17458 On entry *REF_CU is the CU of SRC_DIE.
17459 On exit *REF_CU is the CU of the result. */
17461 static struct die_info *
17462 follow_die_ref (struct die_info *src_die, struct attribute *attr,
17463 struct dwarf2_cu **ref_cu)
17465 sect_offset offset = dwarf2_get_ref_die_offset (attr);
17466 struct dwarf2_cu *cu = *ref_cu;
17467 struct die_info *die;
17469 die = follow_die_offset (offset,
17470 (attr->form == DW_FORM_GNU_ref_alt
17471 || cu->per_cu->is_dwz),
17474 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17475 "at 0x%x [in module %s]"),
17476 offset.sect_off, src_die->offset.sect_off, cu->objfile->name);
17481 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17482 Returned value is intended for DW_OP_call*. Returned
17483 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17485 struct dwarf2_locexpr_baton
17486 dwarf2_fetch_die_loc_sect_off (sect_offset offset,
17487 struct dwarf2_per_cu_data *per_cu,
17488 CORE_ADDR (*get_frame_pc) (void *baton),
17491 struct dwarf2_cu *cu;
17492 struct die_info *die;
17493 struct attribute *attr;
17494 struct dwarf2_locexpr_baton retval;
17496 dw2_setup (per_cu->objfile);
17498 if (per_cu->cu == NULL)
17502 die = follow_die_offset (offset, per_cu->is_dwz, &cu);
17504 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17505 offset.sect_off, per_cu->objfile->name);
17507 attr = dwarf2_attr (die, DW_AT_location, cu);
17510 /* DWARF: "If there is no such attribute, then there is no effect.".
17511 DATA is ignored if SIZE is 0. */
17513 retval.data = NULL;
17516 else if (attr_form_is_section_offset (attr))
17518 struct dwarf2_loclist_baton loclist_baton;
17519 CORE_ADDR pc = (*get_frame_pc) (baton);
17522 fill_in_loclist_baton (cu, &loclist_baton, attr);
17524 retval.data = dwarf2_find_location_expression (&loclist_baton,
17526 retval.size = size;
17530 if (!attr_form_is_block (attr))
17531 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17532 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17533 offset.sect_off, per_cu->objfile->name);
17535 retval.data = DW_BLOCK (attr)->data;
17536 retval.size = DW_BLOCK (attr)->size;
17538 retval.per_cu = cu->per_cu;
17540 age_cached_comp_units ();
17545 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17548 struct dwarf2_locexpr_baton
17549 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu,
17550 struct dwarf2_per_cu_data *per_cu,
17551 CORE_ADDR (*get_frame_pc) (void *baton),
17554 sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off };
17556 return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton);
17559 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17563 dwarf2_get_die_type (cu_offset die_offset,
17564 struct dwarf2_per_cu_data *per_cu)
17566 sect_offset die_offset_sect;
17568 dw2_setup (per_cu->objfile);
17570 die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off;
17571 return get_die_type_at_offset (die_offset_sect, per_cu);
17574 /* Follow the signature attribute ATTR in SRC_DIE.
17575 On entry *REF_CU is the CU of SRC_DIE.
17576 On exit *REF_CU is the CU of the result. */
17578 static struct die_info *
17579 follow_die_sig (struct die_info *src_die, struct attribute *attr,
17580 struct dwarf2_cu **ref_cu)
17582 struct objfile *objfile = (*ref_cu)->objfile;
17583 struct die_info temp_die;
17584 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
17585 struct dwarf2_cu *sig_cu;
17586 struct die_info *die;
17588 /* sig_type will be NULL if the signatured type is missing from
17590 if (sig_type == NULL)
17591 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17592 "at 0x%x [in module %s]"),
17593 src_die->offset.sect_off, objfile->name);
17595 /* If necessary, add it to the queue and load its DIEs. */
17597 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal))
17598 read_signatured_type (sig_type);
17600 gdb_assert (sig_type->per_cu.cu != NULL);
17602 sig_cu = sig_type->per_cu.cu;
17603 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
17604 temp_die.offset = sig_type->type_offset_in_section;
17605 die = htab_find_with_hash (sig_cu->die_hash, &temp_die,
17606 temp_die.offset.sect_off);
17609 /* For .gdb_index version 7 keep track of included TUs.
17610 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
17611 if (dwarf2_per_objfile->index_table != NULL
17612 && dwarf2_per_objfile->index_table->version <= 7)
17614 VEC_safe_push (dwarf2_per_cu_ptr,
17615 (*ref_cu)->per_cu->imported_symtabs,
17623 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17624 "from DIE at 0x%x [in module %s]"),
17625 temp_die.offset.sect_off, src_die->offset.sect_off, objfile->name);
17628 /* Given an offset of a signatured type, return its signatured_type. */
17630 static struct signatured_type *
17631 lookup_signatured_type_at_offset (struct objfile *objfile,
17632 struct dwarf2_section_info *section,
17633 sect_offset offset)
17635 gdb_byte *info_ptr = section->buffer + offset.sect_off;
17636 unsigned int length, initial_length_size;
17637 unsigned int sig_offset;
17638 struct signatured_type find_entry, *sig_type;
17640 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
17641 sig_offset = (initial_length_size
17643 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
17644 + 1 /*address_size*/);
17645 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
17646 sig_type = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
17648 /* This is only used to lookup previously recorded types.
17649 If we didn't find it, it's our bug. */
17650 gdb_assert (sig_type != NULL);
17651 gdb_assert (offset.sect_off == sig_type->per_cu.offset.sect_off);
17656 /* Load the DIEs associated with type unit PER_CU into memory. */
17659 load_full_type_unit (struct dwarf2_per_cu_data *per_cu)
17661 struct signatured_type *sig_type;
17663 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17664 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
17666 /* We have the per_cu, but we need the signatured_type.
17667 Fortunately this is an easy translation. */
17668 gdb_assert (per_cu->is_debug_types);
17669 sig_type = (struct signatured_type *) per_cu;
17671 gdb_assert (per_cu->cu == NULL);
17673 read_signatured_type (sig_type);
17675 gdb_assert (per_cu->cu != NULL);
17678 /* die_reader_func for read_signatured_type.
17679 This is identical to load_full_comp_unit_reader,
17680 but is kept separate for now. */
17683 read_signatured_type_reader (const struct die_reader_specs *reader,
17684 gdb_byte *info_ptr,
17685 struct die_info *comp_unit_die,
17689 struct dwarf2_cu *cu = reader->cu;
17691 gdb_assert (cu->die_hash == NULL);
17693 htab_create_alloc_ex (cu->header.length / 12,
17697 &cu->comp_unit_obstack,
17698 hashtab_obstack_allocate,
17699 dummy_obstack_deallocate);
17702 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
17703 &info_ptr, comp_unit_die);
17704 cu->dies = comp_unit_die;
17705 /* comp_unit_die is not stored in die_hash, no need. */
17707 /* We try not to read any attributes in this function, because not
17708 all CUs needed for references have been loaded yet, and symbol
17709 table processing isn't initialized. But we have to set the CU language,
17710 or we won't be able to build types correctly.
17711 Similarly, if we do not read the producer, we can not apply
17712 producer-specific interpretation. */
17713 prepare_one_comp_unit (cu, cu->dies, language_minimal);
17716 /* Read in a signatured type and build its CU and DIEs.
17717 If the type is a stub for the real type in a DWO file,
17718 read in the real type from the DWO file as well. */
17721 read_signatured_type (struct signatured_type *sig_type)
17723 struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu;
17725 gdb_assert (per_cu->is_debug_types);
17726 gdb_assert (per_cu->cu == NULL);
17728 init_cutu_and_read_dies (per_cu, NULL, 0, 1,
17729 read_signatured_type_reader, NULL);
17732 /* Decode simple location descriptions.
17733 Given a pointer to a dwarf block that defines a location, compute
17734 the location and return the value.
17736 NOTE drow/2003-11-18: This function is called in two situations
17737 now: for the address of static or global variables (partial symbols
17738 only) and for offsets into structures which are expected to be
17739 (more or less) constant. The partial symbol case should go away,
17740 and only the constant case should remain. That will let this
17741 function complain more accurately. A few special modes are allowed
17742 without complaint for global variables (for instance, global
17743 register values and thread-local values).
17745 A location description containing no operations indicates that the
17746 object is optimized out. The return value is 0 for that case.
17747 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17748 callers will only want a very basic result and this can become a
17751 Note that stack[0] is unused except as a default error return. */
17754 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
17756 struct objfile *objfile = cu->objfile;
17758 size_t size = blk->size;
17759 gdb_byte *data = blk->data;
17760 CORE_ADDR stack[64];
17762 unsigned int bytes_read, unsnd;
17768 stack[++stacki] = 0;
17807 stack[++stacki] = op - DW_OP_lit0;
17842 stack[++stacki] = op - DW_OP_reg0;
17844 dwarf2_complex_location_expr_complaint ();
17848 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
17850 stack[++stacki] = unsnd;
17852 dwarf2_complex_location_expr_complaint ();
17856 stack[++stacki] = read_address (objfile->obfd, &data[i],
17861 case DW_OP_const1u:
17862 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
17866 case DW_OP_const1s:
17867 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
17871 case DW_OP_const2u:
17872 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
17876 case DW_OP_const2s:
17877 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
17881 case DW_OP_const4u:
17882 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
17886 case DW_OP_const4s:
17887 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
17891 case DW_OP_const8u:
17892 stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]);
17897 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
17903 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
17908 stack[stacki + 1] = stack[stacki];
17913 stack[stacki - 1] += stack[stacki];
17917 case DW_OP_plus_uconst:
17918 stack[stacki] += read_unsigned_leb128 (NULL, (data + i),
17924 stack[stacki - 1] -= stack[stacki];
17929 /* If we're not the last op, then we definitely can't encode
17930 this using GDB's address_class enum. This is valid for partial
17931 global symbols, although the variable's address will be bogus
17934 dwarf2_complex_location_expr_complaint ();
17937 case DW_OP_GNU_push_tls_address:
17938 /* The top of the stack has the offset from the beginning
17939 of the thread control block at which the variable is located. */
17940 /* Nothing should follow this operator, so the top of stack would
17942 /* This is valid for partial global symbols, but the variable's
17943 address will be bogus in the psymtab. Make it always at least
17944 non-zero to not look as a variable garbage collected by linker
17945 which have DW_OP_addr 0. */
17947 dwarf2_complex_location_expr_complaint ();
17951 case DW_OP_GNU_uninit:
17954 case DW_OP_GNU_addr_index:
17955 case DW_OP_GNU_const_index:
17956 stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i],
17963 const char *name = get_DW_OP_name (op);
17966 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
17969 complaint (&symfile_complaints, _("unsupported stack op: '%02x'"),
17973 return (stack[stacki]);
17976 /* Enforce maximum stack depth of SIZE-1 to avoid writing
17977 outside of the allocated space. Also enforce minimum>0. */
17978 if (stacki >= ARRAY_SIZE (stack) - 1)
17980 complaint (&symfile_complaints,
17981 _("location description stack overflow"));
17987 complaint (&symfile_complaints,
17988 _("location description stack underflow"));
17992 return (stack[stacki]);
17995 /* memory allocation interface */
17997 static struct dwarf_block *
17998 dwarf_alloc_block (struct dwarf2_cu *cu)
18000 struct dwarf_block *blk;
18002 blk = (struct dwarf_block *)
18003 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
18007 static struct die_info *
18008 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
18010 struct die_info *die;
18011 size_t size = sizeof (struct die_info);
18014 size += (num_attrs - 1) * sizeof (struct attribute);
18016 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
18017 memset (die, 0, sizeof (struct die_info));
18022 /* Macro support. */
18024 /* Return the full name of file number I in *LH's file name table.
18025 Use COMP_DIR as the name of the current directory of the
18026 compilation. The result is allocated using xmalloc; the caller is
18027 responsible for freeing it. */
18029 file_full_name (int file, struct line_header *lh, const char *comp_dir)
18031 /* Is the file number a valid index into the line header's file name
18032 table? Remember that file numbers start with one, not zero. */
18033 if (1 <= file && file <= lh->num_file_names)
18035 struct file_entry *fe = &lh->file_names[file - 1];
18037 if (IS_ABSOLUTE_PATH (fe->name))
18038 return xstrdup (fe->name);
18046 dir = lh->include_dirs[fe->dir_index - 1];
18052 dir_len = strlen (dir);
18053 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
18054 strcpy (full_name, dir);
18055 full_name[dir_len] = '/';
18056 strcpy (full_name + dir_len + 1, fe->name);
18060 return xstrdup (fe->name);
18065 /* The compiler produced a bogus file number. We can at least
18066 record the macro definitions made in the file, even if we
18067 won't be able to find the file by name. */
18068 char fake_name[80];
18070 xsnprintf (fake_name, sizeof (fake_name),
18071 "<bad macro file number %d>", file);
18073 complaint (&symfile_complaints,
18074 _("bad file number in macro information (%d)"),
18077 return xstrdup (fake_name);
18082 static struct macro_source_file *
18083 macro_start_file (int file, int line,
18084 struct macro_source_file *current_file,
18085 const char *comp_dir,
18086 struct line_header *lh, struct objfile *objfile)
18088 /* The full name of this source file. */
18089 char *full_name = file_full_name (file, lh, comp_dir);
18091 /* We don't create a macro table for this compilation unit
18092 at all until we actually get a filename. */
18093 if (! pending_macros)
18094 pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack,
18095 objfile->per_bfd->macro_cache);
18097 if (! current_file)
18099 /* If we have no current file, then this must be the start_file
18100 directive for the compilation unit's main source file. */
18101 current_file = macro_set_main (pending_macros, full_name);
18102 macro_define_special (pending_macros);
18105 current_file = macro_include (current_file, line, full_name);
18109 return current_file;
18113 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18114 followed by a null byte. */
18116 copy_string (const char *buf, int len)
18118 char *s = xmalloc (len + 1);
18120 memcpy (s, buf, len);
18126 static const char *
18127 consume_improper_spaces (const char *p, const char *body)
18131 complaint (&symfile_complaints,
18132 _("macro definition contains spaces "
18133 "in formal argument list:\n`%s'"),
18145 parse_macro_definition (struct macro_source_file *file, int line,
18150 /* The body string takes one of two forms. For object-like macro
18151 definitions, it should be:
18153 <macro name> " " <definition>
18155 For function-like macro definitions, it should be:
18157 <macro name> "() " <definition>
18159 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18161 Spaces may appear only where explicitly indicated, and in the
18164 The Dwarf 2 spec says that an object-like macro's name is always
18165 followed by a space, but versions of GCC around March 2002 omit
18166 the space when the macro's definition is the empty string.
18168 The Dwarf 2 spec says that there should be no spaces between the
18169 formal arguments in a function-like macro's formal argument list,
18170 but versions of GCC around March 2002 include spaces after the
18174 /* Find the extent of the macro name. The macro name is terminated
18175 by either a space or null character (for an object-like macro) or
18176 an opening paren (for a function-like macro). */
18177 for (p = body; *p; p++)
18178 if (*p == ' ' || *p == '(')
18181 if (*p == ' ' || *p == '\0')
18183 /* It's an object-like macro. */
18184 int name_len = p - body;
18185 char *name = copy_string (body, name_len);
18186 const char *replacement;
18189 replacement = body + name_len + 1;
18192 dwarf2_macro_malformed_definition_complaint (body);
18193 replacement = body + name_len;
18196 macro_define_object (file, line, name, replacement);
18200 else if (*p == '(')
18202 /* It's a function-like macro. */
18203 char *name = copy_string (body, p - body);
18206 char **argv = xmalloc (argv_size * sizeof (*argv));
18210 p = consume_improper_spaces (p, body);
18212 /* Parse the formal argument list. */
18213 while (*p && *p != ')')
18215 /* Find the extent of the current argument name. */
18216 const char *arg_start = p;
18218 while (*p && *p != ',' && *p != ')' && *p != ' ')
18221 if (! *p || p == arg_start)
18222 dwarf2_macro_malformed_definition_complaint (body);
18225 /* Make sure argv has room for the new argument. */
18226 if (argc >= argv_size)
18229 argv = xrealloc (argv, argv_size * sizeof (*argv));
18232 argv[argc++] = copy_string (arg_start, p - arg_start);
18235 p = consume_improper_spaces (p, body);
18237 /* Consume the comma, if present. */
18242 p = consume_improper_spaces (p, body);
18251 /* Perfectly formed definition, no complaints. */
18252 macro_define_function (file, line, name,
18253 argc, (const char **) argv,
18255 else if (*p == '\0')
18257 /* Complain, but do define it. */
18258 dwarf2_macro_malformed_definition_complaint (body);
18259 macro_define_function (file, line, name,
18260 argc, (const char **) argv,
18264 /* Just complain. */
18265 dwarf2_macro_malformed_definition_complaint (body);
18268 /* Just complain. */
18269 dwarf2_macro_malformed_definition_complaint (body);
18275 for (i = 0; i < argc; i++)
18281 dwarf2_macro_malformed_definition_complaint (body);
18284 /* Skip some bytes from BYTES according to the form given in FORM.
18285 Returns the new pointer. */
18288 skip_form_bytes (bfd *abfd, gdb_byte *bytes, gdb_byte *buffer_end,
18289 enum dwarf_form form,
18290 unsigned int offset_size,
18291 struct dwarf2_section_info *section)
18293 unsigned int bytes_read;
18297 case DW_FORM_data1:
18302 case DW_FORM_data2:
18306 case DW_FORM_data4:
18310 case DW_FORM_data8:
18314 case DW_FORM_string:
18315 read_direct_string (abfd, bytes, &bytes_read);
18316 bytes += bytes_read;
18319 case DW_FORM_sec_offset:
18321 case DW_FORM_GNU_strp_alt:
18322 bytes += offset_size;
18325 case DW_FORM_block:
18326 bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read);
18327 bytes += bytes_read;
18330 case DW_FORM_block1:
18331 bytes += 1 + read_1_byte (abfd, bytes);
18333 case DW_FORM_block2:
18334 bytes += 2 + read_2_bytes (abfd, bytes);
18336 case DW_FORM_block4:
18337 bytes += 4 + read_4_bytes (abfd, bytes);
18340 case DW_FORM_sdata:
18341 case DW_FORM_udata:
18342 case DW_FORM_GNU_addr_index:
18343 case DW_FORM_GNU_str_index:
18344 bytes = (gdb_byte *) gdb_skip_leb128 (bytes, buffer_end);
18347 dwarf2_section_buffer_overflow_complaint (section);
18355 complaint (&symfile_complaints,
18356 _("invalid form 0x%x in `%s'"),
18358 section->asection->name);
18366 /* A helper for dwarf_decode_macros that handles skipping an unknown
18367 opcode. Returns an updated pointer to the macro data buffer; or,
18368 on error, issues a complaint and returns NULL. */
18371 skip_unknown_opcode (unsigned int opcode,
18372 gdb_byte **opcode_definitions,
18373 gdb_byte *mac_ptr, gdb_byte *mac_end,
18375 unsigned int offset_size,
18376 struct dwarf2_section_info *section)
18378 unsigned int bytes_read, i;
18382 if (opcode_definitions[opcode] == NULL)
18384 complaint (&symfile_complaints,
18385 _("unrecognized DW_MACFINO opcode 0x%x"),
18390 defn = opcode_definitions[opcode];
18391 arg = read_unsigned_leb128 (abfd, defn, &bytes_read);
18392 defn += bytes_read;
18394 for (i = 0; i < arg; ++i)
18396 mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size,
18398 if (mac_ptr == NULL)
18400 /* skip_form_bytes already issued the complaint. */
18408 /* A helper function which parses the header of a macro section.
18409 If the macro section is the extended (for now called "GNU") type,
18410 then this updates *OFFSET_SIZE. Returns a pointer to just after
18411 the header, or issues a complaint and returns NULL on error. */
18414 dwarf_parse_macro_header (gdb_byte **opcode_definitions,
18417 unsigned int *offset_size,
18418 int section_is_gnu)
18420 memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *));
18422 if (section_is_gnu)
18424 unsigned int version, flags;
18426 version = read_2_bytes (abfd, mac_ptr);
18429 complaint (&symfile_complaints,
18430 _("unrecognized version `%d' in .debug_macro section"),
18436 flags = read_1_byte (abfd, mac_ptr);
18438 *offset_size = (flags & 1) ? 8 : 4;
18440 if ((flags & 2) != 0)
18441 /* We don't need the line table offset. */
18442 mac_ptr += *offset_size;
18444 /* Vendor opcode descriptions. */
18445 if ((flags & 4) != 0)
18447 unsigned int i, count;
18449 count = read_1_byte (abfd, mac_ptr);
18451 for (i = 0; i < count; ++i)
18453 unsigned int opcode, bytes_read;
18456 opcode = read_1_byte (abfd, mac_ptr);
18458 opcode_definitions[opcode] = mac_ptr;
18459 arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18460 mac_ptr += bytes_read;
18469 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18470 including DW_MACRO_GNU_transparent_include. */
18473 dwarf_decode_macro_bytes (bfd *abfd, gdb_byte *mac_ptr, gdb_byte *mac_end,
18474 struct macro_source_file *current_file,
18475 struct line_header *lh, const char *comp_dir,
18476 struct dwarf2_section_info *section,
18477 int section_is_gnu, int section_is_dwz,
18478 unsigned int offset_size,
18479 struct objfile *objfile,
18480 htab_t include_hash)
18482 enum dwarf_macro_record_type macinfo_type;
18483 int at_commandline;
18484 gdb_byte *opcode_definitions[256];
18486 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
18487 &offset_size, section_is_gnu);
18488 if (mac_ptr == NULL)
18490 /* We already issued a complaint. */
18494 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18495 GDB is still reading the definitions from command line. First
18496 DW_MACINFO_start_file will need to be ignored as it was already executed
18497 to create CURRENT_FILE for the main source holding also the command line
18498 definitions. On first met DW_MACINFO_start_file this flag is reset to
18499 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18501 at_commandline = 1;
18505 /* Do we at least have room for a macinfo type byte? */
18506 if (mac_ptr >= mac_end)
18508 dwarf2_section_buffer_overflow_complaint (section);
18512 macinfo_type = read_1_byte (abfd, mac_ptr);
18515 /* Note that we rely on the fact that the corresponding GNU and
18516 DWARF constants are the same. */
18517 switch (macinfo_type)
18519 /* A zero macinfo type indicates the end of the macro
18524 case DW_MACRO_GNU_define:
18525 case DW_MACRO_GNU_undef:
18526 case DW_MACRO_GNU_define_indirect:
18527 case DW_MACRO_GNU_undef_indirect:
18528 case DW_MACRO_GNU_define_indirect_alt:
18529 case DW_MACRO_GNU_undef_indirect_alt:
18531 unsigned int bytes_read;
18536 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18537 mac_ptr += bytes_read;
18539 if (macinfo_type == DW_MACRO_GNU_define
18540 || macinfo_type == DW_MACRO_GNU_undef)
18542 body = read_direct_string (abfd, mac_ptr, &bytes_read);
18543 mac_ptr += bytes_read;
18547 LONGEST str_offset;
18549 str_offset = read_offset_1 (abfd, mac_ptr, offset_size);
18550 mac_ptr += offset_size;
18552 if (macinfo_type == DW_MACRO_GNU_define_indirect_alt
18553 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt
18556 struct dwz_file *dwz = dwarf2_get_dwz_file ();
18558 body = read_indirect_string_from_dwz (dwz, str_offset);
18561 body = read_indirect_string_at_offset (abfd, str_offset);
18564 is_define = (macinfo_type == DW_MACRO_GNU_define
18565 || macinfo_type == DW_MACRO_GNU_define_indirect
18566 || macinfo_type == DW_MACRO_GNU_define_indirect_alt);
18567 if (! current_file)
18569 /* DWARF violation as no main source is present. */
18570 complaint (&symfile_complaints,
18571 _("debug info with no main source gives macro %s "
18573 is_define ? _("definition") : _("undefinition"),
18577 if ((line == 0 && !at_commandline)
18578 || (line != 0 && at_commandline))
18579 complaint (&symfile_complaints,
18580 _("debug info gives %s macro %s with %s line %d: %s"),
18581 at_commandline ? _("command-line") : _("in-file"),
18582 is_define ? _("definition") : _("undefinition"),
18583 line == 0 ? _("zero") : _("non-zero"), line, body);
18586 parse_macro_definition (current_file, line, body);
18589 gdb_assert (macinfo_type == DW_MACRO_GNU_undef
18590 || macinfo_type == DW_MACRO_GNU_undef_indirect
18591 || macinfo_type == DW_MACRO_GNU_undef_indirect_alt);
18592 macro_undef (current_file, line, body);
18597 case DW_MACRO_GNU_start_file:
18599 unsigned int bytes_read;
18602 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18603 mac_ptr += bytes_read;
18604 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18605 mac_ptr += bytes_read;
18607 if ((line == 0 && !at_commandline)
18608 || (line != 0 && at_commandline))
18609 complaint (&symfile_complaints,
18610 _("debug info gives source %d included "
18611 "from %s at %s line %d"),
18612 file, at_commandline ? _("command-line") : _("file"),
18613 line == 0 ? _("zero") : _("non-zero"), line);
18615 if (at_commandline)
18617 /* This DW_MACRO_GNU_start_file was executed in the
18619 at_commandline = 0;
18622 current_file = macro_start_file (file, line,
18623 current_file, comp_dir,
18628 case DW_MACRO_GNU_end_file:
18629 if (! current_file)
18630 complaint (&symfile_complaints,
18631 _("macro debug info has an unmatched "
18632 "`close_file' directive"));
18635 current_file = current_file->included_by;
18636 if (! current_file)
18638 enum dwarf_macro_record_type next_type;
18640 /* GCC circa March 2002 doesn't produce the zero
18641 type byte marking the end of the compilation
18642 unit. Complain if it's not there, but exit no
18645 /* Do we at least have room for a macinfo type byte? */
18646 if (mac_ptr >= mac_end)
18648 dwarf2_section_buffer_overflow_complaint (section);
18652 /* We don't increment mac_ptr here, so this is just
18654 next_type = read_1_byte (abfd, mac_ptr);
18655 if (next_type != 0)
18656 complaint (&symfile_complaints,
18657 _("no terminating 0-type entry for "
18658 "macros in `.debug_macinfo' section"));
18665 case DW_MACRO_GNU_transparent_include:
18666 case DW_MACRO_GNU_transparent_include_alt:
18670 bfd *include_bfd = abfd;
18671 struct dwarf2_section_info *include_section = section;
18672 struct dwarf2_section_info alt_section;
18673 gdb_byte *include_mac_end = mac_end;
18674 int is_dwz = section_is_dwz;
18675 gdb_byte *new_mac_ptr;
18677 offset = read_offset_1 (abfd, mac_ptr, offset_size);
18678 mac_ptr += offset_size;
18680 if (macinfo_type == DW_MACRO_GNU_transparent_include_alt)
18682 struct dwz_file *dwz = dwarf2_get_dwz_file ();
18684 dwarf2_read_section (dwarf2_per_objfile->objfile,
18687 include_bfd = dwz->macro.asection->owner;
18688 include_section = &dwz->macro;
18689 include_mac_end = dwz->macro.buffer + dwz->macro.size;
18693 new_mac_ptr = include_section->buffer + offset;
18694 slot = htab_find_slot (include_hash, new_mac_ptr, INSERT);
18698 /* This has actually happened; see
18699 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18700 complaint (&symfile_complaints,
18701 _("recursive DW_MACRO_GNU_transparent_include in "
18702 ".debug_macro section"));
18706 *slot = new_mac_ptr;
18708 dwarf_decode_macro_bytes (include_bfd, new_mac_ptr,
18709 include_mac_end, current_file,
18711 section, section_is_gnu, is_dwz,
18712 offset_size, objfile, include_hash);
18714 htab_remove_elt (include_hash, new_mac_ptr);
18719 case DW_MACINFO_vendor_ext:
18720 if (!section_is_gnu)
18722 unsigned int bytes_read;
18725 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18726 mac_ptr += bytes_read;
18727 read_direct_string (abfd, mac_ptr, &bytes_read);
18728 mac_ptr += bytes_read;
18730 /* We don't recognize any vendor extensions. */
18736 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
18737 mac_ptr, mac_end, abfd, offset_size,
18739 if (mac_ptr == NULL)
18743 } while (macinfo_type != 0);
18747 dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset,
18748 const char *comp_dir, int section_is_gnu)
18750 struct objfile *objfile = dwarf2_per_objfile->objfile;
18751 struct line_header *lh = cu->line_header;
18753 gdb_byte *mac_ptr, *mac_end;
18754 struct macro_source_file *current_file = 0;
18755 enum dwarf_macro_record_type macinfo_type;
18756 unsigned int offset_size = cu->header.offset_size;
18757 gdb_byte *opcode_definitions[256];
18758 struct cleanup *cleanup;
18759 htab_t include_hash;
18761 struct dwarf2_section_info *section;
18762 const char *section_name;
18764 if (cu->dwo_unit != NULL)
18766 if (section_is_gnu)
18768 section = &cu->dwo_unit->dwo_file->sections.macro;
18769 section_name = ".debug_macro.dwo";
18773 section = &cu->dwo_unit->dwo_file->sections.macinfo;
18774 section_name = ".debug_macinfo.dwo";
18779 if (section_is_gnu)
18781 section = &dwarf2_per_objfile->macro;
18782 section_name = ".debug_macro";
18786 section = &dwarf2_per_objfile->macinfo;
18787 section_name = ".debug_macinfo";
18791 dwarf2_read_section (objfile, section);
18792 if (section->buffer == NULL)
18794 complaint (&symfile_complaints, _("missing %s section"), section_name);
18797 abfd = section->asection->owner;
18799 /* First pass: Find the name of the base filename.
18800 This filename is needed in order to process all macros whose definition
18801 (or undefinition) comes from the command line. These macros are defined
18802 before the first DW_MACINFO_start_file entry, and yet still need to be
18803 associated to the base file.
18805 To determine the base file name, we scan the macro definitions until we
18806 reach the first DW_MACINFO_start_file entry. We then initialize
18807 CURRENT_FILE accordingly so that any macro definition found before the
18808 first DW_MACINFO_start_file can still be associated to the base file. */
18810 mac_ptr = section->buffer + offset;
18811 mac_end = section->buffer + section->size;
18813 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
18814 &offset_size, section_is_gnu);
18815 if (mac_ptr == NULL)
18817 /* We already issued a complaint. */
18823 /* Do we at least have room for a macinfo type byte? */
18824 if (mac_ptr >= mac_end)
18826 /* Complaint is printed during the second pass as GDB will probably
18827 stop the first pass earlier upon finding
18828 DW_MACINFO_start_file. */
18832 macinfo_type = read_1_byte (abfd, mac_ptr);
18835 /* Note that we rely on the fact that the corresponding GNU and
18836 DWARF constants are the same. */
18837 switch (macinfo_type)
18839 /* A zero macinfo type indicates the end of the macro
18844 case DW_MACRO_GNU_define:
18845 case DW_MACRO_GNU_undef:
18846 /* Only skip the data by MAC_PTR. */
18848 unsigned int bytes_read;
18850 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18851 mac_ptr += bytes_read;
18852 read_direct_string (abfd, mac_ptr, &bytes_read);
18853 mac_ptr += bytes_read;
18857 case DW_MACRO_GNU_start_file:
18859 unsigned int bytes_read;
18862 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18863 mac_ptr += bytes_read;
18864 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18865 mac_ptr += bytes_read;
18867 current_file = macro_start_file (file, line, current_file,
18868 comp_dir, lh, objfile);
18872 case DW_MACRO_GNU_end_file:
18873 /* No data to skip by MAC_PTR. */
18876 case DW_MACRO_GNU_define_indirect:
18877 case DW_MACRO_GNU_undef_indirect:
18878 case DW_MACRO_GNU_define_indirect_alt:
18879 case DW_MACRO_GNU_undef_indirect_alt:
18881 unsigned int bytes_read;
18883 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18884 mac_ptr += bytes_read;
18885 mac_ptr += offset_size;
18889 case DW_MACRO_GNU_transparent_include:
18890 case DW_MACRO_GNU_transparent_include_alt:
18891 /* Note that, according to the spec, a transparent include
18892 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18893 skip this opcode. */
18894 mac_ptr += offset_size;
18897 case DW_MACINFO_vendor_ext:
18898 /* Only skip the data by MAC_PTR. */
18899 if (!section_is_gnu)
18901 unsigned int bytes_read;
18903 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
18904 mac_ptr += bytes_read;
18905 read_direct_string (abfd, mac_ptr, &bytes_read);
18906 mac_ptr += bytes_read;
18911 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
18912 mac_ptr, mac_end, abfd, offset_size,
18914 if (mac_ptr == NULL)
18918 } while (macinfo_type != 0 && current_file == NULL);
18920 /* Second pass: Process all entries.
18922 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18923 command-line macro definitions/undefinitions. This flag is unset when we
18924 reach the first DW_MACINFO_start_file entry. */
18926 include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
18927 NULL, xcalloc, xfree);
18928 cleanup = make_cleanup_htab_delete (include_hash);
18929 mac_ptr = section->buffer + offset;
18930 slot = htab_find_slot (include_hash, mac_ptr, INSERT);
18932 dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end,
18933 current_file, lh, comp_dir, section,
18935 offset_size, objfile, include_hash);
18936 do_cleanups (cleanup);
18939 /* Check if the attribute's form is a DW_FORM_block*
18940 if so return true else false. */
18943 attr_form_is_block (struct attribute *attr)
18945 return (attr == NULL ? 0 :
18946 attr->form == DW_FORM_block1
18947 || attr->form == DW_FORM_block2
18948 || attr->form == DW_FORM_block4
18949 || attr->form == DW_FORM_block
18950 || attr->form == DW_FORM_exprloc);
18953 /* Return non-zero if ATTR's value is a section offset --- classes
18954 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18955 You may use DW_UNSND (attr) to retrieve such offsets.
18957 Section 7.5.4, "Attribute Encodings", explains that no attribute
18958 may have a value that belongs to more than one of these classes; it
18959 would be ambiguous if we did, because we use the same forms for all
18963 attr_form_is_section_offset (struct attribute *attr)
18965 return (attr->form == DW_FORM_data4
18966 || attr->form == DW_FORM_data8
18967 || attr->form == DW_FORM_sec_offset);
18970 /* Return non-zero if ATTR's value falls in the 'constant' class, or
18971 zero otherwise. When this function returns true, you can apply
18972 dwarf2_get_attr_constant_value to it.
18974 However, note that for some attributes you must check
18975 attr_form_is_section_offset before using this test. DW_FORM_data4
18976 and DW_FORM_data8 are members of both the constant class, and of
18977 the classes that contain offsets into other debug sections
18978 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
18979 that, if an attribute's can be either a constant or one of the
18980 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
18981 taken as section offsets, not constants. */
18984 attr_form_is_constant (struct attribute *attr)
18986 switch (attr->form)
18988 case DW_FORM_sdata:
18989 case DW_FORM_udata:
18990 case DW_FORM_data1:
18991 case DW_FORM_data2:
18992 case DW_FORM_data4:
18993 case DW_FORM_data8:
19000 /* Return the .debug_loc section to use for CU.
19001 For DWO files use .debug_loc.dwo. */
19003 static struct dwarf2_section_info *
19004 cu_debug_loc_section (struct dwarf2_cu *cu)
19007 return &cu->dwo_unit->dwo_file->sections.loc;
19008 return &dwarf2_per_objfile->loc;
19011 /* A helper function that fills in a dwarf2_loclist_baton. */
19014 fill_in_loclist_baton (struct dwarf2_cu *cu,
19015 struct dwarf2_loclist_baton *baton,
19016 struct attribute *attr)
19018 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
19020 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
19022 baton->per_cu = cu->per_cu;
19023 gdb_assert (baton->per_cu);
19024 /* We don't know how long the location list is, but make sure we
19025 don't run off the edge of the section. */
19026 baton->size = section->size - DW_UNSND (attr);
19027 baton->data = section->buffer + DW_UNSND (attr);
19028 baton->base_address = cu->base_address;
19029 baton->from_dwo = cu->dwo_unit != NULL;
19033 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
19034 struct dwarf2_cu *cu)
19036 struct objfile *objfile = dwarf2_per_objfile->objfile;
19037 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
19039 if (attr_form_is_section_offset (attr)
19040 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
19041 the section. If so, fall through to the complaint in the
19043 && DW_UNSND (attr) < dwarf2_section_size (objfile, section))
19045 struct dwarf2_loclist_baton *baton;
19047 baton = obstack_alloc (&objfile->objfile_obstack,
19048 sizeof (struct dwarf2_loclist_baton));
19050 fill_in_loclist_baton (cu, baton, attr);
19052 if (cu->base_known == 0)
19053 complaint (&symfile_complaints,
19054 _("Location list used without "
19055 "specifying the CU base address."));
19057 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
19058 SYMBOL_LOCATION_BATON (sym) = baton;
19062 struct dwarf2_locexpr_baton *baton;
19064 baton = obstack_alloc (&objfile->objfile_obstack,
19065 sizeof (struct dwarf2_locexpr_baton));
19066 baton->per_cu = cu->per_cu;
19067 gdb_assert (baton->per_cu);
19069 if (attr_form_is_block (attr))
19071 /* Note that we're just copying the block's data pointer
19072 here, not the actual data. We're still pointing into the
19073 info_buffer for SYM's objfile; right now we never release
19074 that buffer, but when we do clean up properly this may
19076 baton->size = DW_BLOCK (attr)->size;
19077 baton->data = DW_BLOCK (attr)->data;
19081 dwarf2_invalid_attrib_class_complaint ("location description",
19082 SYMBOL_NATURAL_NAME (sym));
19086 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
19087 SYMBOL_LOCATION_BATON (sym) = baton;
19091 /* Return the OBJFILE associated with the compilation unit CU. If CU
19092 came from a separate debuginfo file, then the master objfile is
19096 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
19098 struct objfile *objfile = per_cu->objfile;
19100 /* Return the master objfile, so that we can report and look up the
19101 correct file containing this variable. */
19102 if (objfile->separate_debug_objfile_backlink)
19103 objfile = objfile->separate_debug_objfile_backlink;
19108 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
19109 (CU_HEADERP is unused in such case) or prepare a temporary copy at
19110 CU_HEADERP first. */
19112 static const struct comp_unit_head *
19113 per_cu_header_read_in (struct comp_unit_head *cu_headerp,
19114 struct dwarf2_per_cu_data *per_cu)
19116 gdb_byte *info_ptr;
19119 return &per_cu->cu->header;
19121 info_ptr = per_cu->info_or_types_section->buffer + per_cu->offset.sect_off;
19123 memset (cu_headerp, 0, sizeof (*cu_headerp));
19124 read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd);
19129 /* Return the address size given in the compilation unit header for CU. */
19132 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
19134 struct comp_unit_head cu_header_local;
19135 const struct comp_unit_head *cu_headerp;
19137 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
19139 return cu_headerp->addr_size;
19142 /* Return the offset size given in the compilation unit header for CU. */
19145 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
19147 struct comp_unit_head cu_header_local;
19148 const struct comp_unit_head *cu_headerp;
19150 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
19152 return cu_headerp->offset_size;
19155 /* See its dwarf2loc.h declaration. */
19158 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu)
19160 struct comp_unit_head cu_header_local;
19161 const struct comp_unit_head *cu_headerp;
19163 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
19165 if (cu_headerp->version == 2)
19166 return cu_headerp->addr_size;
19168 return cu_headerp->offset_size;
19171 /* Return the text offset of the CU. The returned offset comes from
19172 this CU's objfile. If this objfile came from a separate debuginfo
19173 file, then the offset may be different from the corresponding
19174 offset in the parent objfile. */
19177 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
19179 struct objfile *objfile = per_cu->objfile;
19181 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
19184 /* Locate the .debug_info compilation unit from CU's objfile which contains
19185 the DIE at OFFSET. Raises an error on failure. */
19187 static struct dwarf2_per_cu_data *
19188 dwarf2_find_containing_comp_unit (sect_offset offset,
19189 unsigned int offset_in_dwz,
19190 struct objfile *objfile)
19192 struct dwarf2_per_cu_data *this_cu;
19194 const sect_offset *cu_off;
19197 high = dwarf2_per_objfile->n_comp_units - 1;
19200 struct dwarf2_per_cu_data *mid_cu;
19201 int mid = low + (high - low) / 2;
19203 mid_cu = dwarf2_per_objfile->all_comp_units[mid];
19204 cu_off = &mid_cu->offset;
19205 if (mid_cu->is_dwz > offset_in_dwz
19206 || (mid_cu->is_dwz == offset_in_dwz
19207 && cu_off->sect_off >= offset.sect_off))
19212 gdb_assert (low == high);
19213 this_cu = dwarf2_per_objfile->all_comp_units[low];
19214 cu_off = &this_cu->offset;
19215 if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off)
19217 if (low == 0 || this_cu->is_dwz != offset_in_dwz)
19218 error (_("Dwarf Error: could not find partial DIE containing "
19219 "offset 0x%lx [in module %s]"),
19220 (long) offset.sect_off, bfd_get_filename (objfile->obfd));
19222 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off
19223 <= offset.sect_off);
19224 return dwarf2_per_objfile->all_comp_units[low-1];
19228 this_cu = dwarf2_per_objfile->all_comp_units[low];
19229 if (low == dwarf2_per_objfile->n_comp_units - 1
19230 && offset.sect_off >= this_cu->offset.sect_off + this_cu->length)
19231 error (_("invalid dwarf2 offset %u"), offset.sect_off);
19232 gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length);
19237 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19240 init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu)
19242 memset (cu, 0, sizeof (*cu));
19244 cu->per_cu = per_cu;
19245 cu->objfile = per_cu->objfile;
19246 obstack_init (&cu->comp_unit_obstack);
19249 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19252 prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die,
19253 enum language pretend_language)
19255 struct attribute *attr;
19257 /* Set the language we're debugging. */
19258 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
19260 set_cu_language (DW_UNSND (attr), cu);
19263 cu->language = pretend_language;
19264 cu->language_defn = language_def (cu->language);
19267 attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu);
19269 cu->producer = DW_STRING (attr);
19272 /* Release one cached compilation unit, CU. We unlink it from the tree
19273 of compilation units, but we don't remove it from the read_in_chain;
19274 the caller is responsible for that.
19275 NOTE: DATA is a void * because this function is also used as a
19276 cleanup routine. */
19279 free_heap_comp_unit (void *data)
19281 struct dwarf2_cu *cu = data;
19283 gdb_assert (cu->per_cu != NULL);
19284 cu->per_cu->cu = NULL;
19287 obstack_free (&cu->comp_unit_obstack, NULL);
19292 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19293 when we're finished with it. We can't free the pointer itself, but be
19294 sure to unlink it from the cache. Also release any associated storage. */
19297 free_stack_comp_unit (void *data)
19299 struct dwarf2_cu *cu = data;
19301 gdb_assert (cu->per_cu != NULL);
19302 cu->per_cu->cu = NULL;
19305 obstack_free (&cu->comp_unit_obstack, NULL);
19306 cu->partial_dies = NULL;
19309 /* Free all cached compilation units. */
19312 free_cached_comp_units (void *data)
19314 struct dwarf2_per_cu_data *per_cu, **last_chain;
19316 per_cu = dwarf2_per_objfile->read_in_chain;
19317 last_chain = &dwarf2_per_objfile->read_in_chain;
19318 while (per_cu != NULL)
19320 struct dwarf2_per_cu_data *next_cu;
19322 next_cu = per_cu->cu->read_in_chain;
19324 free_heap_comp_unit (per_cu->cu);
19325 *last_chain = next_cu;
19331 /* Increase the age counter on each cached compilation unit, and free
19332 any that are too old. */
19335 age_cached_comp_units (void)
19337 struct dwarf2_per_cu_data *per_cu, **last_chain;
19339 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
19340 per_cu = dwarf2_per_objfile->read_in_chain;
19341 while (per_cu != NULL)
19343 per_cu->cu->last_used ++;
19344 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
19345 dwarf2_mark (per_cu->cu);
19346 per_cu = per_cu->cu->read_in_chain;
19349 per_cu = dwarf2_per_objfile->read_in_chain;
19350 last_chain = &dwarf2_per_objfile->read_in_chain;
19351 while (per_cu != NULL)
19353 struct dwarf2_per_cu_data *next_cu;
19355 next_cu = per_cu->cu->read_in_chain;
19357 if (!per_cu->cu->mark)
19359 free_heap_comp_unit (per_cu->cu);
19360 *last_chain = next_cu;
19363 last_chain = &per_cu->cu->read_in_chain;
19369 /* Remove a single compilation unit from the cache. */
19372 free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu)
19374 struct dwarf2_per_cu_data *per_cu, **last_chain;
19376 per_cu = dwarf2_per_objfile->read_in_chain;
19377 last_chain = &dwarf2_per_objfile->read_in_chain;
19378 while (per_cu != NULL)
19380 struct dwarf2_per_cu_data *next_cu;
19382 next_cu = per_cu->cu->read_in_chain;
19384 if (per_cu == target_per_cu)
19386 free_heap_comp_unit (per_cu->cu);
19388 *last_chain = next_cu;
19392 last_chain = &per_cu->cu->read_in_chain;
19398 /* Release all extra memory associated with OBJFILE. */
19401 dwarf2_free_objfile (struct objfile *objfile)
19403 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
19405 if (dwarf2_per_objfile == NULL)
19408 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19409 free_cached_comp_units (NULL);
19411 if (dwarf2_per_objfile->quick_file_names_table)
19412 htab_delete (dwarf2_per_objfile->quick_file_names_table);
19414 /* Everything else should be on the objfile obstack. */
19417 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19418 We store these in a hash table separate from the DIEs, and preserve them
19419 when the DIEs are flushed out of cache.
19421 The CU "per_cu" pointer is needed because offset alone is not enough to
19422 uniquely identify the type. A file may have multiple .debug_types sections,
19423 or the type may come from a DWO file. We have to use something in
19424 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19425 routine, get_die_type_at_offset, from outside this file, and thus won't
19426 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19429 struct dwarf2_per_cu_offset_and_type
19431 const struct dwarf2_per_cu_data *per_cu;
19432 sect_offset offset;
19436 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19439 per_cu_offset_and_type_hash (const void *item)
19441 const struct dwarf2_per_cu_offset_and_type *ofs = item;
19443 return (uintptr_t) ofs->per_cu + ofs->offset.sect_off;
19446 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19449 per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs)
19451 const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs;
19452 const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs;
19454 return (ofs_lhs->per_cu == ofs_rhs->per_cu
19455 && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off);
19458 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19459 table if necessary. For convenience, return TYPE.
19461 The DIEs reading must have careful ordering to:
19462 * Not cause infite loops trying to read in DIEs as a prerequisite for
19463 reading current DIE.
19464 * Not trying to dereference contents of still incompletely read in types
19465 while reading in other DIEs.
19466 * Enable referencing still incompletely read in types just by a pointer to
19467 the type without accessing its fields.
19469 Therefore caller should follow these rules:
19470 * Try to fetch any prerequisite types we may need to build this DIE type
19471 before building the type and calling set_die_type.
19472 * After building type call set_die_type for current DIE as soon as
19473 possible before fetching more types to complete the current type.
19474 * Make the type as complete as possible before fetching more types. */
19476 static struct type *
19477 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
19479 struct dwarf2_per_cu_offset_and_type **slot, ofs;
19480 struct objfile *objfile = cu->objfile;
19482 /* For Ada types, make sure that the gnat-specific data is always
19483 initialized (if not already set). There are a few types where
19484 we should not be doing so, because the type-specific area is
19485 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19486 where the type-specific area is used to store the floatformat).
19487 But this is not a problem, because the gnat-specific information
19488 is actually not needed for these types. */
19489 if (need_gnat_info (cu)
19490 && TYPE_CODE (type) != TYPE_CODE_FUNC
19491 && TYPE_CODE (type) != TYPE_CODE_FLT
19492 && !HAVE_GNAT_AUX_INFO (type))
19493 INIT_GNAT_SPECIFIC (type);
19495 if (dwarf2_per_objfile->die_type_hash == NULL)
19497 dwarf2_per_objfile->die_type_hash =
19498 htab_create_alloc_ex (127,
19499 per_cu_offset_and_type_hash,
19500 per_cu_offset_and_type_eq,
19502 &objfile->objfile_obstack,
19503 hashtab_obstack_allocate,
19504 dummy_obstack_deallocate);
19507 ofs.per_cu = cu->per_cu;
19508 ofs.offset = die->offset;
19510 slot = (struct dwarf2_per_cu_offset_and_type **)
19511 htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT);
19513 complaint (&symfile_complaints,
19514 _("A problem internal to GDB: DIE 0x%x has type already set"),
19515 die->offset.sect_off);
19516 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
19521 /* Look up the type for the die at OFFSET in the appropriate type_hash
19522 table, or return NULL if the die does not have a saved type. */
19524 static struct type *
19525 get_die_type_at_offset (sect_offset offset,
19526 struct dwarf2_per_cu_data *per_cu)
19528 struct dwarf2_per_cu_offset_and_type *slot, ofs;
19530 if (dwarf2_per_objfile->die_type_hash == NULL)
19533 ofs.per_cu = per_cu;
19534 ofs.offset = offset;
19535 slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs);
19542 /* Look up the type for DIE in the appropriate type_hash table,
19543 or return NULL if DIE does not have a saved type. */
19545 static struct type *
19546 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
19548 return get_die_type_at_offset (die->offset, cu->per_cu);
19551 /* Add a dependence relationship from CU to REF_PER_CU. */
19554 dwarf2_add_dependence (struct dwarf2_cu *cu,
19555 struct dwarf2_per_cu_data *ref_per_cu)
19559 if (cu->dependencies == NULL)
19561 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
19562 NULL, &cu->comp_unit_obstack,
19563 hashtab_obstack_allocate,
19564 dummy_obstack_deallocate);
19566 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
19568 *slot = ref_per_cu;
19571 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19572 Set the mark field in every compilation unit in the
19573 cache that we must keep because we are keeping CU. */
19576 dwarf2_mark_helper (void **slot, void *data)
19578 struct dwarf2_per_cu_data *per_cu;
19580 per_cu = (struct dwarf2_per_cu_data *) *slot;
19582 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19583 reading of the chain. As such dependencies remain valid it is not much
19584 useful to track and undo them during QUIT cleanups. */
19585 if (per_cu->cu == NULL)
19588 if (per_cu->cu->mark)
19590 per_cu->cu->mark = 1;
19592 if (per_cu->cu->dependencies != NULL)
19593 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
19598 /* Set the mark field in CU and in every other compilation unit in the
19599 cache that we must keep because we are keeping CU. */
19602 dwarf2_mark (struct dwarf2_cu *cu)
19607 if (cu->dependencies != NULL)
19608 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
19612 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
19616 per_cu->cu->mark = 0;
19617 per_cu = per_cu->cu->read_in_chain;
19621 /* Trivial hash function for partial_die_info: the hash value of a DIE
19622 is its offset in .debug_info for this objfile. */
19625 partial_die_hash (const void *item)
19627 const struct partial_die_info *part_die = item;
19629 return part_die->offset.sect_off;
19632 /* Trivial comparison function for partial_die_info structures: two DIEs
19633 are equal if they have the same offset. */
19636 partial_die_eq (const void *item_lhs, const void *item_rhs)
19638 const struct partial_die_info *part_die_lhs = item_lhs;
19639 const struct partial_die_info *part_die_rhs = item_rhs;
19641 return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off;
19644 static struct cmd_list_element *set_dwarf2_cmdlist;
19645 static struct cmd_list_element *show_dwarf2_cmdlist;
19648 set_dwarf2_cmd (char *args, int from_tty)
19650 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
19654 show_dwarf2_cmd (char *args, int from_tty)
19656 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
19659 /* Free data associated with OBJFILE, if necessary. */
19662 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
19664 struct dwarf2_per_objfile *data = d;
19667 for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix)
19668 VEC_free (dwarf2_per_cu_ptr,
19669 dwarf2_per_objfile->all_comp_units[ix]->imported_symtabs);
19671 for (ix = 0; ix < dwarf2_per_objfile->n_type_units; ++ix)
19672 VEC_free (dwarf2_per_cu_ptr,
19673 dwarf2_per_objfile->all_type_units[ix]->per_cu.imported_symtabs);
19675 VEC_free (dwarf2_section_info_def, data->types);
19677 if (data->dwo_files)
19678 free_dwo_files (data->dwo_files, objfile);
19680 if (data->dwz_file && data->dwz_file->dwz_bfd)
19681 gdb_bfd_unref (data->dwz_file->dwz_bfd);
19685 /* The "save gdb-index" command. */
19687 /* The contents of the hash table we create when building the string
19689 struct strtab_entry
19691 offset_type offset;
19695 /* Hash function for a strtab_entry.
19697 Function is used only during write_hash_table so no index format backward
19698 compatibility is needed. */
19701 hash_strtab_entry (const void *e)
19703 const struct strtab_entry *entry = e;
19704 return mapped_index_string_hash (INT_MAX, entry->str);
19707 /* Equality function for a strtab_entry. */
19710 eq_strtab_entry (const void *a, const void *b)
19712 const struct strtab_entry *ea = a;
19713 const struct strtab_entry *eb = b;
19714 return !strcmp (ea->str, eb->str);
19717 /* Create a strtab_entry hash table. */
19720 create_strtab (void)
19722 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
19723 xfree, xcalloc, xfree);
19726 /* Add a string to the constant pool. Return the string's offset in
19730 add_string (htab_t table, struct obstack *cpool, const char *str)
19733 struct strtab_entry entry;
19734 struct strtab_entry *result;
19737 slot = htab_find_slot (table, &entry, INSERT);
19742 result = XNEW (struct strtab_entry);
19743 result->offset = obstack_object_size (cpool);
19745 obstack_grow_str0 (cpool, str);
19748 return result->offset;
19751 /* An entry in the symbol table. */
19752 struct symtab_index_entry
19754 /* The name of the symbol. */
19756 /* The offset of the name in the constant pool. */
19757 offset_type index_offset;
19758 /* A sorted vector of the indices of all the CUs that hold an object
19760 VEC (offset_type) *cu_indices;
19763 /* The symbol table. This is a power-of-2-sized hash table. */
19764 struct mapped_symtab
19766 offset_type n_elements;
19768 struct symtab_index_entry **data;
19771 /* Hash function for a symtab_index_entry. */
19774 hash_symtab_entry (const void *e)
19776 const struct symtab_index_entry *entry = e;
19777 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
19778 sizeof (offset_type) * VEC_length (offset_type,
19779 entry->cu_indices),
19783 /* Equality function for a symtab_index_entry. */
19786 eq_symtab_entry (const void *a, const void *b)
19788 const struct symtab_index_entry *ea = a;
19789 const struct symtab_index_entry *eb = b;
19790 int len = VEC_length (offset_type, ea->cu_indices);
19791 if (len != VEC_length (offset_type, eb->cu_indices))
19793 return !memcmp (VEC_address (offset_type, ea->cu_indices),
19794 VEC_address (offset_type, eb->cu_indices),
19795 sizeof (offset_type) * len);
19798 /* Destroy a symtab_index_entry. */
19801 delete_symtab_entry (void *p)
19803 struct symtab_index_entry *entry = p;
19804 VEC_free (offset_type, entry->cu_indices);
19808 /* Create a hash table holding symtab_index_entry objects. */
19811 create_symbol_hash_table (void)
19813 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
19814 delete_symtab_entry, xcalloc, xfree);
19817 /* Create a new mapped symtab object. */
19819 static struct mapped_symtab *
19820 create_mapped_symtab (void)
19822 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
19823 symtab->n_elements = 0;
19824 symtab->size = 1024;
19825 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
19829 /* Destroy a mapped_symtab. */
19832 cleanup_mapped_symtab (void *p)
19834 struct mapped_symtab *symtab = p;
19835 /* The contents of the array are freed when the other hash table is
19837 xfree (symtab->data);
19841 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19844 Function is used only during write_hash_table so no index format backward
19845 compatibility is needed. */
19847 static struct symtab_index_entry **
19848 find_slot (struct mapped_symtab *symtab, const char *name)
19850 offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name);
19852 index = hash & (symtab->size - 1);
19853 step = ((hash * 17) & (symtab->size - 1)) | 1;
19857 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
19858 return &symtab->data[index];
19859 index = (index + step) & (symtab->size - 1);
19863 /* Expand SYMTAB's hash table. */
19866 hash_expand (struct mapped_symtab *symtab)
19868 offset_type old_size = symtab->size;
19870 struct symtab_index_entry **old_entries = symtab->data;
19873 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
19875 for (i = 0; i < old_size; ++i)
19877 if (old_entries[i])
19879 struct symtab_index_entry **slot = find_slot (symtab,
19880 old_entries[i]->name);
19881 *slot = old_entries[i];
19885 xfree (old_entries);
19888 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19889 CU_INDEX is the index of the CU in which the symbol appears.
19890 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19893 add_index_entry (struct mapped_symtab *symtab, const char *name,
19894 int is_static, gdb_index_symbol_kind kind,
19895 offset_type cu_index)
19897 struct symtab_index_entry **slot;
19898 offset_type cu_index_and_attrs;
19900 ++symtab->n_elements;
19901 if (4 * symtab->n_elements / 3 >= symtab->size)
19902 hash_expand (symtab);
19904 slot = find_slot (symtab, name);
19907 *slot = XNEW (struct symtab_index_entry);
19908 (*slot)->name = name;
19909 /* index_offset is set later. */
19910 (*slot)->cu_indices = NULL;
19913 cu_index_and_attrs = 0;
19914 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index);
19915 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static);
19916 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind);
19918 /* We don't want to record an index value twice as we want to avoid the
19920 We process all global symbols and then all static symbols
19921 (which would allow us to avoid the duplication by only having to check
19922 the last entry pushed), but a symbol could have multiple kinds in one CU.
19923 To keep things simple we don't worry about the duplication here and
19924 sort and uniqufy the list after we've processed all symbols. */
19925 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs);
19928 /* qsort helper routine for uniquify_cu_indices. */
19931 offset_type_compare (const void *ap, const void *bp)
19933 offset_type a = *(offset_type *) ap;
19934 offset_type b = *(offset_type *) bp;
19936 return (a > b) - (b > a);
19939 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19942 uniquify_cu_indices (struct mapped_symtab *symtab)
19946 for (i = 0; i < symtab->size; ++i)
19948 struct symtab_index_entry *entry = symtab->data[i];
19951 && entry->cu_indices != NULL)
19953 unsigned int next_to_insert, next_to_check;
19954 offset_type last_value;
19956 qsort (VEC_address (offset_type, entry->cu_indices),
19957 VEC_length (offset_type, entry->cu_indices),
19958 sizeof (offset_type), offset_type_compare);
19960 last_value = VEC_index (offset_type, entry->cu_indices, 0);
19961 next_to_insert = 1;
19962 for (next_to_check = 1;
19963 next_to_check < VEC_length (offset_type, entry->cu_indices);
19966 if (VEC_index (offset_type, entry->cu_indices, next_to_check)
19969 last_value = VEC_index (offset_type, entry->cu_indices,
19971 VEC_replace (offset_type, entry->cu_indices, next_to_insert,
19976 VEC_truncate (offset_type, entry->cu_indices, next_to_insert);
19981 /* Add a vector of indices to the constant pool. */
19984 add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool,
19985 struct symtab_index_entry *entry)
19989 slot = htab_find_slot (symbol_hash_table, entry, INSERT);
19992 offset_type len = VEC_length (offset_type, entry->cu_indices);
19993 offset_type val = MAYBE_SWAP (len);
19998 entry->index_offset = obstack_object_size (cpool);
20000 obstack_grow (cpool, &val, sizeof (val));
20002 VEC_iterate (offset_type, entry->cu_indices, i, iter);
20005 val = MAYBE_SWAP (iter);
20006 obstack_grow (cpool, &val, sizeof (val));
20011 struct symtab_index_entry *old_entry = *slot;
20012 entry->index_offset = old_entry->index_offset;
20015 return entry->index_offset;
20018 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
20019 constant pool entries going into the obstack CPOOL. */
20022 write_hash_table (struct mapped_symtab *symtab,
20023 struct obstack *output, struct obstack *cpool)
20026 htab_t symbol_hash_table;
20029 symbol_hash_table = create_symbol_hash_table ();
20030 str_table = create_strtab ();
20032 /* We add all the index vectors to the constant pool first, to
20033 ensure alignment is ok. */
20034 for (i = 0; i < symtab->size; ++i)
20036 if (symtab->data[i])
20037 add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]);
20040 /* Now write out the hash table. */
20041 for (i = 0; i < symtab->size; ++i)
20043 offset_type str_off, vec_off;
20045 if (symtab->data[i])
20047 str_off = add_string (str_table, cpool, symtab->data[i]->name);
20048 vec_off = symtab->data[i]->index_offset;
20052 /* While 0 is a valid constant pool index, it is not valid
20053 to have 0 for both offsets. */
20058 str_off = MAYBE_SWAP (str_off);
20059 vec_off = MAYBE_SWAP (vec_off);
20061 obstack_grow (output, &str_off, sizeof (str_off));
20062 obstack_grow (output, &vec_off, sizeof (vec_off));
20065 htab_delete (str_table);
20066 htab_delete (symbol_hash_table);
20069 /* Struct to map psymtab to CU index in the index file. */
20070 struct psymtab_cu_index_map
20072 struct partial_symtab *psymtab;
20073 unsigned int cu_index;
20077 hash_psymtab_cu_index (const void *item)
20079 const struct psymtab_cu_index_map *map = item;
20081 return htab_hash_pointer (map->psymtab);
20085 eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs)
20087 const struct psymtab_cu_index_map *lhs = item_lhs;
20088 const struct psymtab_cu_index_map *rhs = item_rhs;
20090 return lhs->psymtab == rhs->psymtab;
20093 /* Helper struct for building the address table. */
20094 struct addrmap_index_data
20096 struct objfile *objfile;
20097 struct obstack *addr_obstack;
20098 htab_t cu_index_htab;
20100 /* Non-zero if the previous_* fields are valid.
20101 We can't write an entry until we see the next entry (since it is only then
20102 that we know the end of the entry). */
20103 int previous_valid;
20104 /* Index of the CU in the table of all CUs in the index file. */
20105 unsigned int previous_cu_index;
20106 /* Start address of the CU. */
20107 CORE_ADDR previous_cu_start;
20110 /* Write an address entry to OBSTACK. */
20113 add_address_entry (struct objfile *objfile, struct obstack *obstack,
20114 CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
20116 offset_type cu_index_to_write;
20118 CORE_ADDR baseaddr;
20120 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
20122 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr);
20123 obstack_grow (obstack, addr, 8);
20124 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr);
20125 obstack_grow (obstack, addr, 8);
20126 cu_index_to_write = MAYBE_SWAP (cu_index);
20127 obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type));
20130 /* Worker function for traversing an addrmap to build the address table. */
20133 add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj)
20135 struct addrmap_index_data *data = datap;
20136 struct partial_symtab *pst = obj;
20138 if (data->previous_valid)
20139 add_address_entry (data->objfile, data->addr_obstack,
20140 data->previous_cu_start, start_addr,
20141 data->previous_cu_index);
20143 data->previous_cu_start = start_addr;
20146 struct psymtab_cu_index_map find_map, *map;
20147 find_map.psymtab = pst;
20148 map = htab_find (data->cu_index_htab, &find_map);
20149 gdb_assert (map != NULL);
20150 data->previous_cu_index = map->cu_index;
20151 data->previous_valid = 1;
20154 data->previous_valid = 0;
20159 /* Write OBJFILE's address map to OBSTACK.
20160 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20161 in the index file. */
20164 write_address_map (struct objfile *objfile, struct obstack *obstack,
20165 htab_t cu_index_htab)
20167 struct addrmap_index_data addrmap_index_data;
20169 /* When writing the address table, we have to cope with the fact that
20170 the addrmap iterator only provides the start of a region; we have to
20171 wait until the next invocation to get the start of the next region. */
20173 addrmap_index_data.objfile = objfile;
20174 addrmap_index_data.addr_obstack = obstack;
20175 addrmap_index_data.cu_index_htab = cu_index_htab;
20176 addrmap_index_data.previous_valid = 0;
20178 addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker,
20179 &addrmap_index_data);
20181 /* It's highly unlikely the last entry (end address = 0xff...ff)
20182 is valid, but we should still handle it.
20183 The end address is recorded as the start of the next region, but that
20184 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20186 if (addrmap_index_data.previous_valid)
20187 add_address_entry (objfile, obstack,
20188 addrmap_index_data.previous_cu_start, (CORE_ADDR) -1,
20189 addrmap_index_data.previous_cu_index);
20192 /* Return the symbol kind of PSYM. */
20194 static gdb_index_symbol_kind
20195 symbol_kind (struct partial_symbol *psym)
20197 domain_enum domain = PSYMBOL_DOMAIN (psym);
20198 enum address_class aclass = PSYMBOL_CLASS (psym);
20206 return GDB_INDEX_SYMBOL_KIND_FUNCTION;
20208 return GDB_INDEX_SYMBOL_KIND_TYPE;
20210 case LOC_CONST_BYTES:
20211 case LOC_OPTIMIZED_OUT:
20213 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
20215 /* Note: It's currently impossible to recognize psyms as enum values
20216 short of reading the type info. For now punt. */
20217 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
20219 /* There are other LOC_FOO values that one might want to classify
20220 as variables, but dwarf2read.c doesn't currently use them. */
20221 return GDB_INDEX_SYMBOL_KIND_OTHER;
20223 case STRUCT_DOMAIN:
20224 return GDB_INDEX_SYMBOL_KIND_TYPE;
20226 return GDB_INDEX_SYMBOL_KIND_OTHER;
20230 /* Add a list of partial symbols to SYMTAB. */
20233 write_psymbols (struct mapped_symtab *symtab,
20235 struct partial_symbol **psymp,
20237 offset_type cu_index,
20240 for (; count-- > 0; ++psymp)
20242 struct partial_symbol *psym = *psymp;
20245 if (SYMBOL_LANGUAGE (psym) == language_ada)
20246 error (_("Ada is not currently supported by the index"));
20248 /* Only add a given psymbol once. */
20249 slot = htab_find_slot (psyms_seen, psym, INSERT);
20252 gdb_index_symbol_kind kind = symbol_kind (psym);
20255 add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym),
20256 is_static, kind, cu_index);
20261 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20262 exception if there is an error. */
20265 write_obstack (FILE *file, struct obstack *obstack)
20267 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
20269 != obstack_object_size (obstack))
20270 error (_("couldn't data write to file"));
20273 /* Unlink a file if the argument is not NULL. */
20276 unlink_if_set (void *p)
20278 char **filename = p;
20280 unlink (*filename);
20283 /* A helper struct used when iterating over debug_types. */
20284 struct signatured_type_index_data
20286 struct objfile *objfile;
20287 struct mapped_symtab *symtab;
20288 struct obstack *types_list;
20293 /* A helper function that writes a single signatured_type to an
20297 write_one_signatured_type (void **slot, void *d)
20299 struct signatured_type_index_data *info = d;
20300 struct signatured_type *entry = (struct signatured_type *) *slot;
20301 struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
20302 struct partial_symtab *psymtab = per_cu->v.psymtab;
20305 write_psymbols (info->symtab,
20307 info->objfile->global_psymbols.list
20308 + psymtab->globals_offset,
20309 psymtab->n_global_syms, info->cu_index,
20311 write_psymbols (info->symtab,
20313 info->objfile->static_psymbols.list
20314 + psymtab->statics_offset,
20315 psymtab->n_static_syms, info->cu_index,
20318 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
20319 entry->per_cu.offset.sect_off);
20320 obstack_grow (info->types_list, val, 8);
20321 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
20322 entry->type_offset_in_tu.cu_off);
20323 obstack_grow (info->types_list, val, 8);
20324 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
20325 obstack_grow (info->types_list, val, 8);
20332 /* Recurse into all "included" dependencies and write their symbols as
20333 if they appeared in this psymtab. */
20336 recursively_write_psymbols (struct objfile *objfile,
20337 struct partial_symtab *psymtab,
20338 struct mapped_symtab *symtab,
20340 offset_type cu_index)
20344 for (i = 0; i < psymtab->number_of_dependencies; ++i)
20345 if (psymtab->dependencies[i]->user != NULL)
20346 recursively_write_psymbols (objfile, psymtab->dependencies[i],
20347 symtab, psyms_seen, cu_index);
20349 write_psymbols (symtab,
20351 objfile->global_psymbols.list + psymtab->globals_offset,
20352 psymtab->n_global_syms, cu_index,
20354 write_psymbols (symtab,
20356 objfile->static_psymbols.list + psymtab->statics_offset,
20357 psymtab->n_static_syms, cu_index,
20361 /* Create an index file for OBJFILE in the directory DIR. */
20364 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
20366 struct cleanup *cleanup;
20367 char *filename, *cleanup_filename;
20368 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
20369 struct obstack cu_list, types_cu_list;
20372 struct mapped_symtab *symtab;
20373 offset_type val, size_of_contents, total_len;
20376 htab_t cu_index_htab;
20377 struct psymtab_cu_index_map *psymtab_cu_index_map;
20379 if (!objfile->psymtabs || !objfile->psymtabs_addrmap)
20382 if (dwarf2_per_objfile->using_index)
20383 error (_("Cannot use an index to create the index"));
20385 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1)
20386 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20388 if (stat (objfile->name, &st) < 0)
20389 perror_with_name (objfile->name);
20391 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
20392 INDEX_SUFFIX, (char *) NULL);
20393 cleanup = make_cleanup (xfree, filename);
20395 out_file = fopen (filename, "wb");
20397 error (_("Can't open `%s' for writing"), filename);
20399 cleanup_filename = filename;
20400 make_cleanup (unlink_if_set, &cleanup_filename);
20402 symtab = create_mapped_symtab ();
20403 make_cleanup (cleanup_mapped_symtab, symtab);
20405 obstack_init (&addr_obstack);
20406 make_cleanup_obstack_free (&addr_obstack);
20408 obstack_init (&cu_list);
20409 make_cleanup_obstack_free (&cu_list);
20411 obstack_init (&types_cu_list);
20412 make_cleanup_obstack_free (&types_cu_list);
20414 psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer,
20415 NULL, xcalloc, xfree);
20416 make_cleanup_htab_delete (psyms_seen);
20418 /* While we're scanning CU's create a table that maps a psymtab pointer
20419 (which is what addrmap records) to its index (which is what is recorded
20420 in the index file). This will later be needed to write the address
20422 cu_index_htab = htab_create_alloc (100,
20423 hash_psymtab_cu_index,
20424 eq_psymtab_cu_index,
20425 NULL, xcalloc, xfree);
20426 make_cleanup_htab_delete (cu_index_htab);
20427 psymtab_cu_index_map = (struct psymtab_cu_index_map *)
20428 xmalloc (sizeof (struct psymtab_cu_index_map)
20429 * dwarf2_per_objfile->n_comp_units);
20430 make_cleanup (xfree, psymtab_cu_index_map);
20432 /* The CU list is already sorted, so we don't need to do additional
20433 work here. Also, the debug_types entries do not appear in
20434 all_comp_units, but only in their own hash table. */
20435 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
20437 struct dwarf2_per_cu_data *per_cu
20438 = dwarf2_per_objfile->all_comp_units[i];
20439 struct partial_symtab *psymtab = per_cu->v.psymtab;
20441 struct psymtab_cu_index_map *map;
20444 if (psymtab->user == NULL)
20445 recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i);
20447 map = &psymtab_cu_index_map[i];
20448 map->psymtab = psymtab;
20450 slot = htab_find_slot (cu_index_htab, map, INSERT);
20451 gdb_assert (slot != NULL);
20452 gdb_assert (*slot == NULL);
20455 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
20456 per_cu->offset.sect_off);
20457 obstack_grow (&cu_list, val, 8);
20458 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
20459 obstack_grow (&cu_list, val, 8);
20462 /* Dump the address map. */
20463 write_address_map (objfile, &addr_obstack, cu_index_htab);
20465 /* Write out the .debug_type entries, if any. */
20466 if (dwarf2_per_objfile->signatured_types)
20468 struct signatured_type_index_data sig_data;
20470 sig_data.objfile = objfile;
20471 sig_data.symtab = symtab;
20472 sig_data.types_list = &types_cu_list;
20473 sig_data.psyms_seen = psyms_seen;
20474 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
20475 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
20476 write_one_signatured_type, &sig_data);
20479 /* Now that we've processed all symbols we can shrink their cu_indices
20481 uniquify_cu_indices (symtab);
20483 obstack_init (&constant_pool);
20484 make_cleanup_obstack_free (&constant_pool);
20485 obstack_init (&symtab_obstack);
20486 make_cleanup_obstack_free (&symtab_obstack);
20487 write_hash_table (symtab, &symtab_obstack, &constant_pool);
20489 obstack_init (&contents);
20490 make_cleanup_obstack_free (&contents);
20491 size_of_contents = 6 * sizeof (offset_type);
20492 total_len = size_of_contents;
20494 /* The version number. */
20495 val = MAYBE_SWAP (8);
20496 obstack_grow (&contents, &val, sizeof (val));
20498 /* The offset of the CU list from the start of the file. */
20499 val = MAYBE_SWAP (total_len);
20500 obstack_grow (&contents, &val, sizeof (val));
20501 total_len += obstack_object_size (&cu_list);
20503 /* The offset of the types CU list from the start of the file. */
20504 val = MAYBE_SWAP (total_len);
20505 obstack_grow (&contents, &val, sizeof (val));
20506 total_len += obstack_object_size (&types_cu_list);
20508 /* The offset of the address table from the start of the file. */
20509 val = MAYBE_SWAP (total_len);
20510 obstack_grow (&contents, &val, sizeof (val));
20511 total_len += obstack_object_size (&addr_obstack);
20513 /* The offset of the symbol table from the start of the file. */
20514 val = MAYBE_SWAP (total_len);
20515 obstack_grow (&contents, &val, sizeof (val));
20516 total_len += obstack_object_size (&symtab_obstack);
20518 /* The offset of the constant pool from the start of the file. */
20519 val = MAYBE_SWAP (total_len);
20520 obstack_grow (&contents, &val, sizeof (val));
20521 total_len += obstack_object_size (&constant_pool);
20523 gdb_assert (obstack_object_size (&contents) == size_of_contents);
20525 write_obstack (out_file, &contents);
20526 write_obstack (out_file, &cu_list);
20527 write_obstack (out_file, &types_cu_list);
20528 write_obstack (out_file, &addr_obstack);
20529 write_obstack (out_file, &symtab_obstack);
20530 write_obstack (out_file, &constant_pool);
20534 /* We want to keep the file, so we set cleanup_filename to NULL
20535 here. See unlink_if_set. */
20536 cleanup_filename = NULL;
20538 do_cleanups (cleanup);
20541 /* Implementation of the `save gdb-index' command.
20543 Note that the file format used by this command is documented in the
20544 GDB manual. Any changes here must be documented there. */
20547 save_gdb_index_command (char *arg, int from_tty)
20549 struct objfile *objfile;
20552 error (_("usage: save gdb-index DIRECTORY"));
20554 ALL_OBJFILES (objfile)
20558 /* If the objfile does not correspond to an actual file, skip it. */
20559 if (stat (objfile->name, &st) < 0)
20562 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
20563 if (dwarf2_per_objfile)
20565 volatile struct gdb_exception except;
20567 TRY_CATCH (except, RETURN_MASK_ERROR)
20569 write_psymtabs_to_index (objfile, arg);
20571 if (except.reason < 0)
20572 exception_fprintf (gdb_stderr, except,
20573 _("Error while writing index for `%s': "),
20581 int dwarf2_always_disassemble;
20584 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
20585 struct cmd_list_element *c, const char *value)
20587 fprintf_filtered (file,
20588 _("Whether to always disassemble "
20589 "DWARF expressions is %s.\n"),
20594 show_check_physname (struct ui_file *file, int from_tty,
20595 struct cmd_list_element *c, const char *value)
20597 fprintf_filtered (file,
20598 _("Whether to check \"physname\" is %s.\n"),
20602 void _initialize_dwarf2_read (void);
20605 _initialize_dwarf2_read (void)
20607 struct cmd_list_element *c;
20609 dwarf2_objfile_data_key
20610 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
20612 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
20613 Set DWARF 2 specific variables.\n\
20614 Configure DWARF 2 variables such as the cache size"),
20615 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
20616 0/*allow-unknown*/, &maintenance_set_cmdlist);
20618 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
20619 Show DWARF 2 specific variables\n\
20620 Show DWARF 2 variables such as the cache size"),
20621 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
20622 0/*allow-unknown*/, &maintenance_show_cmdlist);
20624 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
20625 &dwarf2_max_cache_age, _("\
20626 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20627 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20628 A higher limit means that cached compilation units will be stored\n\
20629 in memory longer, and more total memory will be used. Zero disables\n\
20630 caching, which can slow down startup."),
20632 show_dwarf2_max_cache_age,
20633 &set_dwarf2_cmdlist,
20634 &show_dwarf2_cmdlist);
20636 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
20637 &dwarf2_always_disassemble, _("\
20638 Set whether `info address' always disassembles DWARF expressions."), _("\
20639 Show whether `info address' always disassembles DWARF expressions."), _("\
20640 When enabled, DWARF expressions are always printed in an assembly-like\n\
20641 syntax. When disabled, expressions will be printed in a more\n\
20642 conversational style, when possible."),
20644 show_dwarf2_always_disassemble,
20645 &set_dwarf2_cmdlist,
20646 &show_dwarf2_cmdlist);
20648 add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\
20649 Set debugging of the dwarf2 reader."), _("\
20650 Show debugging of the dwarf2 reader."), _("\
20651 When enabled, debugging messages are printed during dwarf2 reading\n\
20652 and symtab expansion."),
20655 &setdebuglist, &showdebuglist);
20657 add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
20658 Set debugging of the dwarf2 DIE reader."), _("\
20659 Show debugging of the dwarf2 DIE reader."), _("\
20660 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20661 The value is the maximum depth to print."),
20664 &setdebuglist, &showdebuglist);
20666 add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\
20667 Set cross-checking of \"physname\" code against demangler."), _("\
20668 Show cross-checking of \"physname\" code against demangler."), _("\
20669 When enabled, GDB's internal \"physname\" code is checked against\n\
20671 NULL, show_check_physname,
20672 &setdebuglist, &showdebuglist);
20674 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20675 no_class, &use_deprecated_index_sections, _("\
20676 Set whether to use deprecated gdb_index sections."), _("\
20677 Show whether to use deprecated gdb_index sections."), _("\
20678 When enabled, deprecated .gdb_index sections are used anyway.\n\
20679 Normally they are ignored either because of a missing feature or\n\
20680 performance issue.\n\
20681 Warning: This option must be enabled before gdb reads the file."),
20684 &setlist, &showlist);
20686 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
20688 Save a gdb-index file.\n\
20689 Usage: save gdb-index DIRECTORY"),
20691 set_cmd_completer (c, filename_completer);