1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2012 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. */
39 #include "gdb-demangle.h"
40 #include "expression.h"
41 #include "filenames.h" /* for DOSish file names */
44 #include "complaints.h"
46 #include "dwarf2expr.h"
47 #include "dwarf2loc.h"
48 #include "cp-support.h"
54 #include "typeprint.h"
57 #include "exceptions.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
69 #include "gdb_string.h"
70 #include "gdb_assert.h"
71 #include <sys/types.h>
78 #define MAP_FAILED ((void *) -1)
82 typedef struct symbol *symbolp;
85 /* When non-zero, print basic high level tracing messages.
86 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
87 static int dwarf2_read_debug = 0;
89 /* When non-zero, dump DIEs after they are read in. */
90 static int dwarf2_die_debug = 0;
92 /* When non-zero, cross-check physname against demangler. */
93 static int check_physname = 0;
95 /* When non-zero, do not reject deprecated .gdb_index sections. */
96 int use_deprecated_index_sections = 0;
100 /* When set, the file that we're processing is known to have debugging
101 info for C++ namespaces. GCC 3.3.x did not produce this information,
102 but later versions do. */
104 static int processing_has_namespace_info;
106 static const struct objfile_data *dwarf2_objfile_data_key;
108 struct dwarf2_section_info
113 /* Not NULL if the section was actually mmapped. */
115 /* Page aligned size of mmapped area. */
116 bfd_size_type map_len;
117 /* True if we have tried to read this section. */
121 typedef struct dwarf2_section_info dwarf2_section_info_def;
122 DEF_VEC_O (dwarf2_section_info_def);
124 /* All offsets in the index are of this type. It must be
125 architecture-independent. */
126 typedef uint32_t offset_type;
128 DEF_VEC_I (offset_type);
130 /* Ensure only legit values are used. */
131 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
133 gdb_assert ((unsigned int) (value) <= 1); \
134 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
137 /* Ensure only legit values are used. */
138 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
140 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
141 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
142 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
145 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
146 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
148 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
149 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
152 /* A description of the mapped index. The file format is described in
153 a comment by the code that writes the index. */
156 /* Index data format version. */
159 /* The total length of the buffer. */
162 /* A pointer to the address table data. */
163 const gdb_byte *address_table;
165 /* Size of the address table data in bytes. */
166 offset_type address_table_size;
168 /* The symbol table, implemented as a hash table. */
169 const offset_type *symbol_table;
171 /* Size in slots, each slot is 2 offset_types. */
172 offset_type symbol_table_slots;
174 /* A pointer to the constant pool. */
175 const char *constant_pool;
178 typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr;
179 DEF_VEC_P (dwarf2_per_cu_ptr);
181 /* Collection of data recorded per objfile.
182 This hangs off of dwarf2_objfile_data_key. */
184 struct dwarf2_per_objfile
186 struct dwarf2_section_info info;
187 struct dwarf2_section_info abbrev;
188 struct dwarf2_section_info line;
189 struct dwarf2_section_info loc;
190 struct dwarf2_section_info macinfo;
191 struct dwarf2_section_info macro;
192 struct dwarf2_section_info str;
193 struct dwarf2_section_info ranges;
194 struct dwarf2_section_info addr;
195 struct dwarf2_section_info frame;
196 struct dwarf2_section_info eh_frame;
197 struct dwarf2_section_info gdb_index;
199 VEC (dwarf2_section_info_def) *types;
202 struct objfile *objfile;
204 /* Table of all the compilation units. This is used to locate
205 the target compilation unit of a particular reference. */
206 struct dwarf2_per_cu_data **all_comp_units;
208 /* The number of compilation units in ALL_COMP_UNITS. */
211 /* The number of .debug_types-related CUs. */
214 /* The .debug_types-related CUs (TUs). */
215 struct signatured_type **all_type_units;
217 /* The number of entries in all_type_unit_groups. */
218 int n_type_unit_groups;
220 /* Table of type unit groups.
221 This exists to make it easy to iterate over all CUs and TU groups. */
222 struct type_unit_group **all_type_unit_groups;
224 /* Table of struct type_unit_group objects.
225 The hash key is the DW_AT_stmt_list value. */
226 htab_t type_unit_groups;
228 /* A table mapping .debug_types signatures to its signatured_type entry.
229 This is NULL if the .debug_types section hasn't been read in yet. */
230 htab_t signatured_types;
232 /* Type unit statistics, to see how well the scaling improvements
236 int nr_uniq_abbrev_tables;
238 int nr_symtab_sharers;
239 int nr_stmt_less_type_units;
242 /* A chain of compilation units that are currently read in, so that
243 they can be freed later. */
244 struct dwarf2_per_cu_data *read_in_chain;
246 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
247 This is NULL if the table hasn't been allocated yet. */
250 /* A flag indicating wether this objfile has a section loaded at a
252 int has_section_at_zero;
254 /* True if we are using the mapped index,
255 or we are faking it for OBJF_READNOW's sake. */
256 unsigned char using_index;
258 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
259 struct mapped_index *index_table;
261 /* When using index_table, this keeps track of all quick_file_names entries.
262 TUs can share line table entries with CUs or other TUs, and there can be
263 a lot more TUs than unique line tables, so we maintain a separate table
264 of all line table entries to support the sharing. */
265 htab_t quick_file_names_table;
267 /* Set during partial symbol reading, to prevent queueing of full
269 int reading_partial_symbols;
271 /* Table mapping type DIEs to their struct type *.
272 This is NULL if not allocated yet.
273 The mapping is done via (CU/TU signature + DIE offset) -> type. */
274 htab_t die_type_hash;
276 /* The CUs we recently read. */
277 VEC (dwarf2_per_cu_ptr) *just_read_cus;
280 static struct dwarf2_per_objfile *dwarf2_per_objfile;
282 /* Default names of the debugging sections. */
284 /* Note that if the debugging section has been compressed, it might
285 have a name like .zdebug_info. */
287 static const struct dwarf2_debug_sections dwarf2_elf_names =
289 { ".debug_info", ".zdebug_info" },
290 { ".debug_abbrev", ".zdebug_abbrev" },
291 { ".debug_line", ".zdebug_line" },
292 { ".debug_loc", ".zdebug_loc" },
293 { ".debug_macinfo", ".zdebug_macinfo" },
294 { ".debug_macro", ".zdebug_macro" },
295 { ".debug_str", ".zdebug_str" },
296 { ".debug_ranges", ".zdebug_ranges" },
297 { ".debug_types", ".zdebug_types" },
298 { ".debug_addr", ".zdebug_addr" },
299 { ".debug_frame", ".zdebug_frame" },
300 { ".eh_frame", NULL },
301 { ".gdb_index", ".zgdb_index" },
305 /* List of DWO sections. */
307 static const struct dwo_section_names
309 struct dwarf2_section_names abbrev_dwo;
310 struct dwarf2_section_names info_dwo;
311 struct dwarf2_section_names line_dwo;
312 struct dwarf2_section_names loc_dwo;
313 struct dwarf2_section_names macinfo_dwo;
314 struct dwarf2_section_names macro_dwo;
315 struct dwarf2_section_names str_dwo;
316 struct dwarf2_section_names str_offsets_dwo;
317 struct dwarf2_section_names types_dwo;
321 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
322 { ".debug_info.dwo", ".zdebug_info.dwo" },
323 { ".debug_line.dwo", ".zdebug_line.dwo" },
324 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
325 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
326 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
327 { ".debug_str.dwo", ".zdebug_str.dwo" },
328 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
329 { ".debug_types.dwo", ".zdebug_types.dwo" },
332 /* local data types */
334 /* The data in a compilation unit header, after target2host
335 translation, looks like this. */
336 struct comp_unit_head
340 unsigned char addr_size;
341 unsigned char signed_addr_p;
342 sect_offset abbrev_offset;
344 /* Size of file offsets; either 4 or 8. */
345 unsigned int offset_size;
347 /* Size of the length field; either 4 or 12. */
348 unsigned int initial_length_size;
350 /* Offset to the first byte of this compilation unit header in the
351 .debug_info section, for resolving relative reference dies. */
354 /* Offset to first die in this cu from the start of the cu.
355 This will be the first byte following the compilation unit header. */
356 cu_offset first_die_offset;
359 /* Type used for delaying computation of method physnames.
360 See comments for compute_delayed_physnames. */
361 struct delayed_method_info
363 /* The type to which the method is attached, i.e., its parent class. */
366 /* The index of the method in the type's function fieldlists. */
369 /* The index of the method in the fieldlist. */
372 /* The name of the DIE. */
375 /* The DIE associated with this method. */
376 struct die_info *die;
379 typedef struct delayed_method_info delayed_method_info;
380 DEF_VEC_O (delayed_method_info);
382 /* Internal state when decoding a particular compilation unit. */
385 /* The objfile containing this compilation unit. */
386 struct objfile *objfile;
388 /* The header of the compilation unit. */
389 struct comp_unit_head header;
391 /* Base address of this compilation unit. */
392 CORE_ADDR base_address;
394 /* Non-zero if base_address has been set. */
397 /* The language we are debugging. */
398 enum language language;
399 const struct language_defn *language_defn;
401 const char *producer;
403 /* The generic symbol table building routines have separate lists for
404 file scope symbols and all all other scopes (local scopes). So
405 we need to select the right one to pass to add_symbol_to_list().
406 We do it by keeping a pointer to the correct list in list_in_scope.
408 FIXME: The original dwarf code just treated the file scope as the
409 first local scope, and all other local scopes as nested local
410 scopes, and worked fine. Check to see if we really need to
411 distinguish these in buildsym.c. */
412 struct pending **list_in_scope;
414 /* The abbrev table for this CU.
415 Normally this points to the abbrev table in the objfile.
416 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
417 struct abbrev_table *abbrev_table;
419 /* Hash table holding all the loaded partial DIEs
420 with partial_die->offset.SECT_OFF as hash. */
423 /* Storage for things with the same lifetime as this read-in compilation
424 unit, including partial DIEs. */
425 struct obstack comp_unit_obstack;
427 /* When multiple dwarf2_cu structures are living in memory, this field
428 chains them all together, so that they can be released efficiently.
429 We will probably also want a generation counter so that most-recently-used
430 compilation units are cached... */
431 struct dwarf2_per_cu_data *read_in_chain;
433 /* Backchain to our per_cu entry if the tree has been built. */
434 struct dwarf2_per_cu_data *per_cu;
436 /* How many compilation units ago was this CU last referenced? */
439 /* A hash table of DIE cu_offset for following references with
440 die_info->offset.sect_off as hash. */
443 /* Full DIEs if read in. */
444 struct die_info *dies;
446 /* A set of pointers to dwarf2_per_cu_data objects for compilation
447 units referenced by this one. Only set during full symbol processing;
448 partial symbol tables do not have dependencies. */
451 /* Header data from the line table, during full symbol processing. */
452 struct line_header *line_header;
454 /* A list of methods which need to have physnames computed
455 after all type information has been read. */
456 VEC (delayed_method_info) *method_list;
458 /* To be copied to symtab->call_site_htab. */
459 htab_t call_site_htab;
461 /* Non-NULL if this CU came from a DWO file.
462 There is an invariant here that is important to remember:
463 Except for attributes copied from the top level DIE in the "main"
464 (or "stub") file in preparation for reading the DWO file
465 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
466 Either there isn't a DWO file (in which case this is NULL and the point
467 is moot), or there is and either we're not going to read it (in which
468 case this is NULL) or there is and we are reading it (in which case this
470 struct dwo_unit *dwo_unit;
472 /* The DW_AT_addr_base attribute if present, zero otherwise
473 (zero is a valid value though).
474 Note this value comes from the stub CU/TU's DIE. */
477 /* The DW_AT_ranges_base attribute if present, zero otherwise
478 (zero is a valid value though).
479 Note this value comes from the stub CU/TU's DIE.
480 Also note that the value is zero in the non-DWO case so this value can
481 be used without needing to know whether DWO files are in use or not. */
482 ULONGEST ranges_base;
484 /* Mark used when releasing cached dies. */
485 unsigned int mark : 1;
487 /* This CU references .debug_loc. See the symtab->locations_valid field.
488 This test is imperfect as there may exist optimized debug code not using
489 any location list and still facing inlining issues if handled as
490 unoptimized code. For a future better test see GCC PR other/32998. */
491 unsigned int has_loclist : 1;
493 /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
494 CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
495 are valid. This information is cached because profiling CU expansion
496 showed excessive time spent in producer_is_gxx_lt_4_6. */
497 unsigned int checked_producer : 1;
498 unsigned int producer_is_gxx_lt_4_6 : 1;
499 unsigned int producer_is_icc : 1;
502 /* Persistent data held for a compilation unit, even when not
503 processing it. We put a pointer to this structure in the
504 read_symtab_private field of the psymtab. */
506 struct dwarf2_per_cu_data
508 /* The start offset and length of this compilation unit. 2**29-1
509 bytes should suffice to store the length of any compilation unit
510 - if it doesn't, GDB will fall over anyway.
511 NOTE: Unlike comp_unit_head.length, this length includes
513 If the DIE refers to a DWO file, this is always of the original die,
516 unsigned int length : 29;
518 /* Flag indicating this compilation unit will be read in before
519 any of the current compilation units are processed. */
520 unsigned int queued : 1;
522 /* This flag will be set when reading partial DIEs if we need to load
523 absolutely all DIEs for this compilation unit, instead of just the ones
524 we think are interesting. It gets set if we look for a DIE in the
525 hash table and don't find it. */
526 unsigned int load_all_dies : 1;
528 /* Non-zero if this CU is from .debug_types. */
529 unsigned int is_debug_types : 1;
531 /* The section this CU/TU lives in.
532 If the DIE refers to a DWO file, this is always the original die,
534 struct dwarf2_section_info *info_or_types_section;
536 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
537 of the CU cache it gets reset to NULL again. */
538 struct dwarf2_cu *cu;
540 /* The corresponding objfile.
541 Normally we can get the objfile from dwarf2_per_objfile.
542 However we can enter this file with just a "per_cu" handle. */
543 struct objfile *objfile;
545 /* When using partial symbol tables, the 'psymtab' field is active.
546 Otherwise the 'quick' field is active. */
549 /* The partial symbol table associated with this compilation unit,
550 or NULL for unread partial units. */
551 struct partial_symtab *psymtab;
553 /* Data needed by the "quick" functions. */
554 struct dwarf2_per_cu_quick_data *quick;
559 /* The CUs we import using DW_TAG_imported_unit. This is filled in
560 while reading psymtabs, used to compute the psymtab dependencies,
561 and then cleared. Then it is filled in again while reading full
562 symbols, and only deleted when the objfile is destroyed. */
563 VEC (dwarf2_per_cu_ptr) *imported_symtabs;
565 /* Type units are grouped by their DW_AT_stmt_list entry so that they
566 can share them. If this is a TU, this points to the containing
568 struct type_unit_group *type_unit_group;
572 /* Entry in the signatured_types hash table. */
574 struct signatured_type
576 /* The "per_cu" object of this type.
577 N.B.: This is the first member so that it's easy to convert pointers
579 struct dwarf2_per_cu_data per_cu;
581 /* The type's signature. */
584 /* Offset in the TU of the type's DIE, as read from the TU header.
585 If the definition lives in a DWO file, this value is unusable. */
586 cu_offset type_offset_in_tu;
588 /* Offset in the section of the type's DIE.
589 If the definition lives in a DWO file, this is the offset in the
590 .debug_types.dwo section.
591 The value is zero until the actual value is known.
592 Zero is otherwise not a valid section offset. */
593 sect_offset type_offset_in_section;
596 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
597 an object of this type. */
599 struct type_unit_group
601 /* dwarf2read.c's main "handle" on the symtab.
602 To simplify things we create an artificial CU that "includes" all the
603 type units using this stmt_list so that the rest of the code still has
604 a "per_cu" handle on the symtab.
605 This PER_CU is recognized by having no section. */
606 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
607 struct dwarf2_per_cu_data *per_cu;
609 /* The TUs that share this DW_AT_stmt_list entry.
610 This is added to while parsing type units to build partial symtabs,
611 and is deleted afterwards and not used again. */
612 VEC (dwarf2_per_cu_ptr) *tus;
614 /* The primary symtab.
615 Type units don't have DW_AT_name so we create an essentially
616 anonymous symtab as the primary symtab. */
617 struct symtab *primary_symtab;
619 /* Offset in .debug_line. This is the hash key. */
620 sect_offset line_offset;
622 /* The number of symtabs from the line header.
623 The value here must match line_header.num_file_names. */
624 unsigned int num_symtabs;
626 /* The symbol tables for this TU (obtained from the files listed in
628 WARNING: The order of entries here must match the order of entries
629 in the line header. After the first TU using this type_unit_group, the
630 line header for the subsequent TUs is recreated from this. This is done
631 because we need to use the same symtabs for each TU using the same
632 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
633 there's no guarantee the line header doesn't have duplicate entries. */
634 struct symtab **symtabs;
637 /* These sections are what may appear in a "dwo" file. */
641 struct dwarf2_section_info abbrev;
642 struct dwarf2_section_info info;
643 struct dwarf2_section_info line;
644 struct dwarf2_section_info loc;
645 struct dwarf2_section_info macinfo;
646 struct dwarf2_section_info macro;
647 struct dwarf2_section_info str;
648 struct dwarf2_section_info str_offsets;
649 VEC (dwarf2_section_info_def) *types;
652 /* Common bits of DWO CUs/TUs. */
656 /* Backlink to the containing struct dwo_file. */
657 struct dwo_file *dwo_file;
659 /* The "id" that distinguishes this CU/TU.
660 .debug_info calls this "dwo_id", .debug_types calls this "signature".
661 Since signatures came first, we stick with it for consistency. */
664 /* The section this CU/TU lives in, in the DWO file. */
665 struct dwarf2_section_info *info_or_types_section;
667 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
671 /* For types, offset in the type's DIE of the type defined by this TU. */
672 cu_offset type_offset_in_tu;
675 /* Data for one DWO file. */
679 /* The DW_AT_GNU_dwo_name attribute.
680 We don't manage space for this, it's an attribute. */
681 const char *dwo_name;
683 /* The bfd, when the file is open. Otherwise this is NULL. */
686 /* Section info for this file. */
687 struct dwo_sections sections;
689 /* Table of CUs in the file.
690 Each element is a struct dwo_unit. */
693 /* Table of TUs in the file.
694 Each element is a struct dwo_unit. */
698 /* Struct used to pass misc. parameters to read_die_and_children, et
699 al. which are used for both .debug_info and .debug_types dies.
700 All parameters here are unchanging for the life of the call. This
701 struct exists to abstract away the constant parameters of die reading. */
703 struct die_reader_specs
705 /* die_section->asection->owner. */
708 /* The CU of the DIE we are parsing. */
709 struct dwarf2_cu *cu;
711 /* Non-NULL if reading a DWO file. */
712 struct dwo_file *dwo_file;
714 /* The section the die comes from.
715 This is either .debug_info or .debug_types, or the .dwo variants. */
716 struct dwarf2_section_info *die_section;
718 /* die_section->buffer. */
721 /* The end of the buffer. */
722 const gdb_byte *buffer_end;
725 /* Type of function passed to init_cutu_and_read_dies, et.al. */
726 typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader,
728 struct die_info *comp_unit_die,
732 /* The line number information for a compilation unit (found in the
733 .debug_line section) begins with a "statement program header",
734 which contains the following information. */
737 unsigned int total_length;
738 unsigned short version;
739 unsigned int header_length;
740 unsigned char minimum_instruction_length;
741 unsigned char maximum_ops_per_instruction;
742 unsigned char default_is_stmt;
744 unsigned char line_range;
745 unsigned char opcode_base;
747 /* standard_opcode_lengths[i] is the number of operands for the
748 standard opcode whose value is i. This means that
749 standard_opcode_lengths[0] is unused, and the last meaningful
750 element is standard_opcode_lengths[opcode_base - 1]. */
751 unsigned char *standard_opcode_lengths;
753 /* The include_directories table. NOTE! These strings are not
754 allocated with xmalloc; instead, they are pointers into
755 debug_line_buffer. If you try to free them, `free' will get
757 unsigned int num_include_dirs, include_dirs_size;
760 /* The file_names table. NOTE! These strings are not allocated
761 with xmalloc; instead, they are pointers into debug_line_buffer.
762 Don't try to free them directly. */
763 unsigned int num_file_names, file_names_size;
767 unsigned int dir_index;
768 unsigned int mod_time;
770 int included_p; /* Non-zero if referenced by the Line Number Program. */
771 struct symtab *symtab; /* The associated symbol table, if any. */
774 /* The start and end of the statement program following this
775 header. These point into dwarf2_per_objfile->line_buffer. */
776 gdb_byte *statement_program_start, *statement_program_end;
779 /* When we construct a partial symbol table entry we only
780 need this much information. */
781 struct partial_die_info
783 /* Offset of this DIE. */
786 /* DWARF-2 tag for this DIE. */
787 ENUM_BITFIELD(dwarf_tag) tag : 16;
789 /* Assorted flags describing the data found in this DIE. */
790 unsigned int has_children : 1;
791 unsigned int is_external : 1;
792 unsigned int is_declaration : 1;
793 unsigned int has_type : 1;
794 unsigned int has_specification : 1;
795 unsigned int has_pc_info : 1;
796 unsigned int may_be_inlined : 1;
798 /* Flag set if the SCOPE field of this structure has been
800 unsigned int scope_set : 1;
802 /* Flag set if the DIE has a byte_size attribute. */
803 unsigned int has_byte_size : 1;
805 /* Flag set if any of the DIE's children are template arguments. */
806 unsigned int has_template_arguments : 1;
808 /* Flag set if fixup_partial_die has been called on this die. */
809 unsigned int fixup_called : 1;
811 /* The name of this DIE. Normally the value of DW_AT_name, but
812 sometimes a default name for unnamed DIEs. */
815 /* The linkage name, if present. */
816 const char *linkage_name;
818 /* The scope to prepend to our children. This is generally
819 allocated on the comp_unit_obstack, so will disappear
820 when this compilation unit leaves the cache. */
823 /* Some data associated with the partial DIE. The tag determines
824 which field is live. */
827 /* The location description associated with this DIE, if any. */
828 struct dwarf_block *locdesc;
829 /* The offset of an import, for DW_TAG_imported_unit. */
833 /* If HAS_PC_INFO, the PC range associated with this DIE. */
837 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
838 DW_AT_sibling, if any. */
839 /* NOTE: This member isn't strictly necessary, read_partial_die could
840 return DW_AT_sibling values to its caller load_partial_dies. */
843 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
844 DW_AT_specification (or DW_AT_abstract_origin or
846 sect_offset spec_offset;
848 /* Pointers to this DIE's parent, first child, and next sibling,
850 struct partial_die_info *die_parent, *die_child, *die_sibling;
853 /* This data structure holds the information of an abbrev. */
856 unsigned int number; /* number identifying abbrev */
857 enum dwarf_tag tag; /* dwarf tag */
858 unsigned short has_children; /* boolean */
859 unsigned short num_attrs; /* number of attributes */
860 struct attr_abbrev *attrs; /* an array of attribute descriptions */
861 struct abbrev_info *next; /* next in chain */
866 ENUM_BITFIELD(dwarf_attribute) name : 16;
867 ENUM_BITFIELD(dwarf_form) form : 16;
870 /* Size of abbrev_table.abbrev_hash_table. */
871 #define ABBREV_HASH_SIZE 121
873 /* Top level data structure to contain an abbreviation table. */
877 /* Where the abbrev table came from.
878 This is used as a sanity check when the table is used. */
881 /* Storage for the abbrev table. */
882 struct obstack abbrev_obstack;
884 /* Hash table of abbrevs.
885 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
886 It could be statically allocated, but the previous code didn't so we
888 struct abbrev_info **abbrevs;
891 /* Attributes have a name and a value. */
894 ENUM_BITFIELD(dwarf_attribute) name : 16;
895 ENUM_BITFIELD(dwarf_form) form : 15;
897 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
898 field should be in u.str (existing only for DW_STRING) but it is kept
899 here for better struct attribute alignment. */
900 unsigned int string_is_canonical : 1;
905 struct dwarf_block *blk;
909 struct signatured_type *signatured_type;
914 /* This data structure holds a complete die structure. */
917 /* DWARF-2 tag for this DIE. */
918 ENUM_BITFIELD(dwarf_tag) tag : 16;
920 /* Number of attributes */
921 unsigned char num_attrs;
923 /* True if we're presently building the full type name for the
924 type derived from this DIE. */
925 unsigned char building_fullname : 1;
930 /* Offset in .debug_info or .debug_types section. */
933 /* The dies in a compilation unit form an n-ary tree. PARENT
934 points to this die's parent; CHILD points to the first child of
935 this node; and all the children of a given node are chained
936 together via their SIBLING fields. */
937 struct die_info *child; /* Its first child, if any. */
938 struct die_info *sibling; /* Its next sibling, if any. */
939 struct die_info *parent; /* Its parent, if any. */
941 /* An array of attributes, with NUM_ATTRS elements. There may be
942 zero, but it's not common and zero-sized arrays are not
943 sufficiently portable C. */
944 struct attribute attrs[1];
947 /* Get at parts of an attribute structure. */
949 #define DW_STRING(attr) ((attr)->u.str)
950 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
951 #define DW_UNSND(attr) ((attr)->u.unsnd)
952 #define DW_BLOCK(attr) ((attr)->u.blk)
953 #define DW_SND(attr) ((attr)->u.snd)
954 #define DW_ADDR(attr) ((attr)->u.addr)
955 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
957 /* Blocks are a bunch of untyped bytes. */
962 /* Valid only if SIZE is not zero. */
966 #ifndef ATTR_ALLOC_CHUNK
967 #define ATTR_ALLOC_CHUNK 4
970 /* Allocate fields for structs, unions and enums in this size. */
971 #ifndef DW_FIELD_ALLOC_CHUNK
972 #define DW_FIELD_ALLOC_CHUNK 4
975 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
976 but this would require a corresponding change in unpack_field_as_long
978 static int bits_per_byte = 8;
980 /* The routines that read and process dies for a C struct or C++ class
981 pass lists of data member fields and lists of member function fields
982 in an instance of a field_info structure, as defined below. */
985 /* List of data member and baseclasses fields. */
988 struct nextfield *next;
993 *fields, *baseclasses;
995 /* Number of fields (including baseclasses). */
998 /* Number of baseclasses. */
1001 /* Set if the accesibility of one of the fields is not public. */
1002 int non_public_fields;
1004 /* Member function fields array, entries are allocated in the order they
1005 are encountered in the object file. */
1008 struct nextfnfield *next;
1009 struct fn_field fnfield;
1013 /* Member function fieldlist array, contains name of possibly overloaded
1014 member function, number of overloaded member functions and a pointer
1015 to the head of the member function field chain. */
1020 struct nextfnfield *head;
1024 /* Number of entries in the fnfieldlists array. */
1027 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1028 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1029 struct typedef_field_list
1031 struct typedef_field field;
1032 struct typedef_field_list *next;
1034 *typedef_field_list;
1035 unsigned typedef_field_list_count;
1038 /* One item on the queue of compilation units to read in full symbols
1040 struct dwarf2_queue_item
1042 struct dwarf2_per_cu_data *per_cu;
1043 enum language pretend_language;
1044 struct dwarf2_queue_item *next;
1047 /* The current queue. */
1048 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
1050 /* Loaded secondary compilation units are kept in memory until they
1051 have not been referenced for the processing of this many
1052 compilation units. Set this to zero to disable caching. Cache
1053 sizes of up to at least twenty will improve startup time for
1054 typical inter-CU-reference binaries, at an obvious memory cost. */
1055 static int dwarf2_max_cache_age = 5;
1057 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
1058 struct cmd_list_element *c, const char *value)
1060 fprintf_filtered (file, _("The upper bound on the age of cached "
1061 "dwarf2 compilation units is %s.\n"),
1066 /* Various complaints about symbol reading that don't abort the process. */
1069 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1071 complaint (&symfile_complaints,
1072 _("statement list doesn't fit in .debug_line section"));
1076 dwarf2_debug_line_missing_file_complaint (void)
1078 complaint (&symfile_complaints,
1079 _(".debug_line section has line data without a file"));
1083 dwarf2_debug_line_missing_end_sequence_complaint (void)
1085 complaint (&symfile_complaints,
1086 _(".debug_line section has line "
1087 "program sequence without an end"));
1091 dwarf2_complex_location_expr_complaint (void)
1093 complaint (&symfile_complaints, _("location expression too complex"));
1097 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
1100 complaint (&symfile_complaints,
1101 _("const value length mismatch for '%s', got %d, expected %d"),
1106 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section)
1108 complaint (&symfile_complaints,
1109 _("debug info runs off end of %s section"
1111 section->asection->name,
1112 bfd_get_filename (section->asection->owner));
1116 dwarf2_macro_malformed_definition_complaint (const char *arg1)
1118 complaint (&symfile_complaints,
1119 _("macro debug info contains a "
1120 "malformed macro definition:\n`%s'"),
1125 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
1127 complaint (&symfile_complaints,
1128 _("invalid attribute class or form for '%s' in '%s'"),
1132 /* local function prototypes */
1134 static void dwarf2_locate_sections (bfd *, asection *, void *);
1136 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
1139 static void dwarf2_find_base_address (struct die_info *die,
1140 struct dwarf2_cu *cu);
1142 static void dwarf2_build_psymtabs_hard (struct objfile *);
1144 static void scan_partial_symbols (struct partial_die_info *,
1145 CORE_ADDR *, CORE_ADDR *,
1146 int, struct dwarf2_cu *);
1148 static void add_partial_symbol (struct partial_die_info *,
1149 struct dwarf2_cu *);
1151 static void add_partial_namespace (struct partial_die_info *pdi,
1152 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1153 int need_pc, struct dwarf2_cu *cu);
1155 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
1156 CORE_ADDR *highpc, int need_pc,
1157 struct dwarf2_cu *cu);
1159 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
1160 struct dwarf2_cu *cu);
1162 static void add_partial_subprogram (struct partial_die_info *pdi,
1163 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1164 int need_pc, struct dwarf2_cu *cu);
1166 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
1168 static void psymtab_to_symtab_1 (struct partial_symtab *);
1170 static struct abbrev_info *abbrev_table_lookup_abbrev
1171 (const struct abbrev_table *, unsigned int);
1173 static struct abbrev_table *abbrev_table_read_table
1174 (struct dwarf2_section_info *, sect_offset);
1176 static void abbrev_table_free (struct abbrev_table *);
1178 static void abbrev_table_free_cleanup (void *);
1180 static void dwarf2_read_abbrevs (struct dwarf2_cu *,
1181 struct dwarf2_section_info *);
1183 static void dwarf2_free_abbrev_table (void *);
1185 static unsigned int peek_abbrev_code (bfd *, gdb_byte *);
1187 static struct partial_die_info *load_partial_dies
1188 (const struct die_reader_specs *, gdb_byte *, int);
1190 static gdb_byte *read_partial_die (const struct die_reader_specs *,
1191 struct partial_die_info *,
1192 struct abbrev_info *,
1196 static struct partial_die_info *find_partial_die (sect_offset,
1197 struct dwarf2_cu *);
1199 static void fixup_partial_die (struct partial_die_info *,
1200 struct dwarf2_cu *);
1202 static gdb_byte *read_attribute (const struct die_reader_specs *,
1203 struct attribute *, struct attr_abbrev *,
1206 static unsigned int read_1_byte (bfd *, gdb_byte *);
1208 static int read_1_signed_byte (bfd *, gdb_byte *);
1210 static unsigned int read_2_bytes (bfd *, gdb_byte *);
1212 static unsigned int read_4_bytes (bfd *, gdb_byte *);
1214 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
1216 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
1219 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
1221 static LONGEST read_checked_initial_length_and_offset
1222 (bfd *, gdb_byte *, const struct comp_unit_head *,
1223 unsigned int *, unsigned int *);
1225 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
1228 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
1230 static sect_offset read_abbrev_offset (struct dwarf2_section_info *,
1233 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
1235 static char *read_direct_string (bfd *, gdb_byte *, unsigned int *);
1237 static char *read_indirect_string (bfd *, gdb_byte *,
1238 const struct comp_unit_head *,
1241 static ULONGEST read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
1243 static LONGEST read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
1245 static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, gdb_byte *,
1248 static char *read_str_index (const struct die_reader_specs *reader,
1249 struct dwarf2_cu *cu, ULONGEST str_index);
1251 static void set_cu_language (unsigned int, struct dwarf2_cu *);
1253 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
1254 struct dwarf2_cu *);
1256 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
1259 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
1260 struct dwarf2_cu *cu);
1262 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
1264 static struct die_info *die_specification (struct die_info *die,
1265 struct dwarf2_cu **);
1267 static void free_line_header (struct line_header *lh);
1269 static void add_file_name (struct line_header *, char *, unsigned int,
1270 unsigned int, unsigned int);
1272 static struct line_header *dwarf_decode_line_header (unsigned int offset,
1273 struct dwarf2_cu *cu);
1275 static void dwarf_decode_lines (struct line_header *, const char *,
1276 struct dwarf2_cu *, struct partial_symtab *,
1279 static void dwarf2_start_subfile (char *, const char *, const char *);
1281 static void dwarf2_start_symtab (struct dwarf2_cu *,
1282 char *, char *, CORE_ADDR);
1284 static struct symbol *new_symbol (struct die_info *, struct type *,
1285 struct dwarf2_cu *);
1287 static struct symbol *new_symbol_full (struct die_info *, struct type *,
1288 struct dwarf2_cu *, struct symbol *);
1290 static void dwarf2_const_value (struct attribute *, struct symbol *,
1291 struct dwarf2_cu *);
1293 static void dwarf2_const_value_attr (struct attribute *attr,
1296 struct obstack *obstack,
1297 struct dwarf2_cu *cu, LONGEST *value,
1299 struct dwarf2_locexpr_baton **baton);
1301 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
1303 static int need_gnat_info (struct dwarf2_cu *);
1305 static struct type *die_descriptive_type (struct die_info *,
1306 struct dwarf2_cu *);
1308 static void set_descriptive_type (struct type *, struct die_info *,
1309 struct dwarf2_cu *);
1311 static struct type *die_containing_type (struct die_info *,
1312 struct dwarf2_cu *);
1314 static struct type *lookup_die_type (struct die_info *, struct attribute *,
1315 struct dwarf2_cu *);
1317 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
1319 static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
1321 static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
1323 static char *typename_concat (struct obstack *obs, const char *prefix,
1324 const char *suffix, int physname,
1325 struct dwarf2_cu *cu);
1327 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
1329 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
1331 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
1333 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
1335 static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu);
1337 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
1338 struct dwarf2_cu *, struct partial_symtab *);
1340 static int dwarf2_get_pc_bounds (struct die_info *,
1341 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
1342 struct partial_symtab *);
1344 static void get_scope_pc_bounds (struct die_info *,
1345 CORE_ADDR *, CORE_ADDR *,
1346 struct dwarf2_cu *);
1348 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
1349 CORE_ADDR, struct dwarf2_cu *);
1351 static void dwarf2_add_field (struct field_info *, struct die_info *,
1352 struct dwarf2_cu *);
1354 static void dwarf2_attach_fields_to_type (struct field_info *,
1355 struct type *, struct dwarf2_cu *);
1357 static void dwarf2_add_member_fn (struct field_info *,
1358 struct die_info *, struct type *,
1359 struct dwarf2_cu *);
1361 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
1363 struct dwarf2_cu *);
1365 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
1367 static void read_common_block (struct die_info *, struct dwarf2_cu *);
1369 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1371 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1373 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1375 static struct type *read_module_type (struct die_info *die,
1376 struct dwarf2_cu *cu);
1378 static const char *namespace_name (struct die_info *die,
1379 int *is_anonymous, struct dwarf2_cu *);
1381 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1383 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1385 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1386 struct dwarf2_cu *);
1388 static struct die_info *read_die_and_children (const struct die_reader_specs *,
1390 gdb_byte **new_info_ptr,
1391 struct die_info *parent);
1393 static struct die_info *read_die_and_siblings (const struct die_reader_specs *,
1395 gdb_byte **new_info_ptr,
1396 struct die_info *parent);
1398 static gdb_byte *read_full_die_1 (const struct die_reader_specs *,
1399 struct die_info **, gdb_byte *, int *, int);
1401 static gdb_byte *read_full_die (const struct die_reader_specs *,
1402 struct die_info **, gdb_byte *, int *);
1404 static void process_die (struct die_info *, struct dwarf2_cu *);
1406 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1409 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1411 static const char *dwarf2_full_name (char *name,
1412 struct die_info *die,
1413 struct dwarf2_cu *cu);
1415 static struct die_info *dwarf2_extension (struct die_info *die,
1416 struct dwarf2_cu **);
1418 static const char *dwarf_tag_name (unsigned int);
1420 static const char *dwarf_attr_name (unsigned int);
1422 static const char *dwarf_form_name (unsigned int);
1424 static char *dwarf_bool_name (unsigned int);
1426 static const char *dwarf_type_encoding_name (unsigned int);
1428 static struct die_info *sibling_die (struct die_info *);
1430 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1432 static void dump_die_for_error (struct die_info *);
1434 static void dump_die_1 (struct ui_file *, int level, int max_level,
1437 /*static*/ void dump_die (struct die_info *, int max_level);
1439 static void store_in_ref_table (struct die_info *,
1440 struct dwarf2_cu *);
1442 static int is_ref_attr (struct attribute *);
1444 static sect_offset dwarf2_get_ref_die_offset (struct attribute *);
1446 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1448 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1450 struct dwarf2_cu **);
1452 static struct die_info *follow_die_ref (struct die_info *,
1454 struct dwarf2_cu **);
1456 static struct die_info *follow_die_sig (struct die_info *,
1458 struct dwarf2_cu **);
1460 static struct signatured_type *lookup_signatured_type_at_offset
1461 (struct objfile *objfile,
1462 struct dwarf2_section_info *section, sect_offset offset);
1464 static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu);
1466 static void read_signatured_type (struct signatured_type *);
1468 static struct type_unit_group *get_type_unit_group
1469 (struct dwarf2_per_cu_data *, struct attribute *);
1471 static void build_type_unit_groups (die_reader_func_ftype *, void *);
1473 /* memory allocation interface */
1475 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1477 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1479 static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int,
1482 static int attr_form_is_block (struct attribute *);
1484 static int attr_form_is_section_offset (struct attribute *);
1486 static int attr_form_is_constant (struct attribute *);
1488 static void fill_in_loclist_baton (struct dwarf2_cu *cu,
1489 struct dwarf2_loclist_baton *baton,
1490 struct attribute *attr);
1492 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1494 struct dwarf2_cu *cu);
1496 static gdb_byte *skip_one_die (const struct die_reader_specs *reader,
1498 struct abbrev_info *abbrev);
1500 static void free_stack_comp_unit (void *);
1502 static hashval_t partial_die_hash (const void *item);
1504 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1506 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1507 (sect_offset offset, struct objfile *objfile);
1509 static void init_one_comp_unit (struct dwarf2_cu *cu,
1510 struct dwarf2_per_cu_data *per_cu);
1512 static void prepare_one_comp_unit (struct dwarf2_cu *cu,
1513 struct die_info *comp_unit_die,
1514 enum language pretend_language);
1516 static void free_heap_comp_unit (void *);
1518 static void free_cached_comp_units (void *);
1520 static void age_cached_comp_units (void);
1522 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *);
1524 static struct type *set_die_type (struct die_info *, struct type *,
1525 struct dwarf2_cu *);
1527 static void create_all_comp_units (struct objfile *);
1529 static int create_all_type_units (struct objfile *);
1531 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1534 static void process_full_comp_unit (struct dwarf2_per_cu_data *,
1537 static void process_full_type_unit (struct dwarf2_per_cu_data *,
1540 static void dwarf2_add_dependence (struct dwarf2_cu *,
1541 struct dwarf2_per_cu_data *);
1543 static void dwarf2_mark (struct dwarf2_cu *);
1545 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1547 static struct type *get_die_type_at_offset (sect_offset,
1548 struct dwarf2_per_cu_data *per_cu);
1550 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1552 static void dwarf2_release_queue (void *dummy);
1554 static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
1555 enum language pretend_language);
1557 static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
1558 struct dwarf2_per_cu_data *per_cu,
1559 enum language pretend_language);
1561 static void process_queue (void);
1563 static void find_file_and_directory (struct die_info *die,
1564 struct dwarf2_cu *cu,
1565 char **name, char **comp_dir);
1567 static char *file_full_name (int file, struct line_header *lh,
1568 const char *comp_dir);
1570 static void init_cutu_and_read_dies
1571 (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table,
1572 int use_existing_cu, int keep,
1573 die_reader_func_ftype *die_reader_func, void *data);
1575 static void init_cutu_and_read_dies_simple
1576 (struct dwarf2_per_cu_data *this_cu,
1577 die_reader_func_ftype *die_reader_func, void *data);
1579 static htab_t allocate_signatured_type_table (struct objfile *objfile);
1581 static htab_t allocate_dwo_unit_table (struct objfile *objfile);
1583 static struct dwo_unit *lookup_dwo_comp_unit
1584 (struct dwarf2_per_cu_data *, char *, const char *, ULONGEST);
1586 static struct dwo_unit *lookup_dwo_type_unit
1587 (struct signatured_type *, char *, const char *);
1589 static void free_dwo_file_cleanup (void *);
1591 static void munmap_section_buffer (struct dwarf2_section_info *);
1593 static void process_cu_includes (void);
1597 /* Convert VALUE between big- and little-endian. */
1599 byte_swap (offset_type value)
1603 result = (value & 0xff) << 24;
1604 result |= (value & 0xff00) << 8;
1605 result |= (value & 0xff0000) >> 8;
1606 result |= (value & 0xff000000) >> 24;
1610 #define MAYBE_SWAP(V) byte_swap (V)
1613 #define MAYBE_SWAP(V) (V)
1614 #endif /* WORDS_BIGENDIAN */
1616 /* The suffix for an index file. */
1617 #define INDEX_SUFFIX ".gdb-index"
1619 static const char *dwarf2_physname (char *name, struct die_info *die,
1620 struct dwarf2_cu *cu);
1622 /* Try to locate the sections we need for DWARF 2 debugging
1623 information and return true if we have enough to do something.
1624 NAMES points to the dwarf2 section names, or is NULL if the standard
1625 ELF names are used. */
1628 dwarf2_has_info (struct objfile *objfile,
1629 const struct dwarf2_debug_sections *names)
1631 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
1632 if (!dwarf2_per_objfile)
1634 /* Initialize per-objfile state. */
1635 struct dwarf2_per_objfile *data
1636 = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1638 memset (data, 0, sizeof (*data));
1639 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1640 dwarf2_per_objfile = data;
1642 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections,
1644 dwarf2_per_objfile->objfile = objfile;
1646 return (dwarf2_per_objfile->info.asection != NULL
1647 && dwarf2_per_objfile->abbrev.asection != NULL);
1650 /* When loading sections, we look either for uncompressed section or for
1651 compressed section names. */
1654 section_is_p (const char *section_name,
1655 const struct dwarf2_section_names *names)
1657 if (names->normal != NULL
1658 && strcmp (section_name, names->normal) == 0)
1660 if (names->compressed != NULL
1661 && strcmp (section_name, names->compressed) == 0)
1666 /* This function is mapped across the sections and remembers the
1667 offset and size of each of the debugging sections we are interested
1671 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames)
1673 const struct dwarf2_debug_sections *names;
1676 names = &dwarf2_elf_names;
1678 names = (const struct dwarf2_debug_sections *) vnames;
1680 if (section_is_p (sectp->name, &names->info))
1682 dwarf2_per_objfile->info.asection = sectp;
1683 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1685 else if (section_is_p (sectp->name, &names->abbrev))
1687 dwarf2_per_objfile->abbrev.asection = sectp;
1688 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1690 else if (section_is_p (sectp->name, &names->line))
1692 dwarf2_per_objfile->line.asection = sectp;
1693 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1695 else if (section_is_p (sectp->name, &names->loc))
1697 dwarf2_per_objfile->loc.asection = sectp;
1698 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1700 else if (section_is_p (sectp->name, &names->macinfo))
1702 dwarf2_per_objfile->macinfo.asection = sectp;
1703 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1705 else if (section_is_p (sectp->name, &names->macro))
1707 dwarf2_per_objfile->macro.asection = sectp;
1708 dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp);
1710 else if (section_is_p (sectp->name, &names->str))
1712 dwarf2_per_objfile->str.asection = sectp;
1713 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1715 else if (section_is_p (sectp->name, &names->addr))
1717 dwarf2_per_objfile->addr.asection = sectp;
1718 dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp);
1720 else if (section_is_p (sectp->name, &names->frame))
1722 dwarf2_per_objfile->frame.asection = sectp;
1723 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1725 else if (section_is_p (sectp->name, &names->eh_frame))
1727 flagword aflag = bfd_get_section_flags (abfd, sectp);
1729 if (aflag & SEC_HAS_CONTENTS)
1731 dwarf2_per_objfile->eh_frame.asection = sectp;
1732 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1735 else if (section_is_p (sectp->name, &names->ranges))
1737 dwarf2_per_objfile->ranges.asection = sectp;
1738 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1740 else if (section_is_p (sectp->name, &names->types))
1742 struct dwarf2_section_info type_section;
1744 memset (&type_section, 0, sizeof (type_section));
1745 type_section.asection = sectp;
1746 type_section.size = bfd_get_section_size (sectp);
1748 VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types,
1751 else if (section_is_p (sectp->name, &names->gdb_index))
1753 dwarf2_per_objfile->gdb_index.asection = sectp;
1754 dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp);
1757 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1758 && bfd_section_vma (abfd, sectp) == 0)
1759 dwarf2_per_objfile->has_section_at_zero = 1;
1762 /* Decompress a section that was compressed using zlib. Store the
1763 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1766 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1767 gdb_byte **outbuf, bfd_size_type *outsize)
1769 bfd *abfd = sectp->owner;
1771 error (_("Support for zlib-compressed DWARF data (from '%s') "
1772 "is disabled in this copy of GDB"),
1773 bfd_get_filename (abfd));
1775 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1776 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1777 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1778 bfd_size_type uncompressed_size;
1779 gdb_byte *uncompressed_buffer;
1782 int header_size = 12;
1784 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1785 || bfd_bread (compressed_buffer,
1786 compressed_size, abfd) != compressed_size)
1787 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1788 bfd_get_filename (abfd));
1790 /* Read the zlib header. In this case, it should be "ZLIB" followed
1791 by the uncompressed section size, 8 bytes in big-endian order. */
1792 if (compressed_size < header_size
1793 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1794 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1795 bfd_get_filename (abfd));
1796 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1797 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1798 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1799 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1800 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1801 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1802 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1803 uncompressed_size += compressed_buffer[11];
1805 /* It is possible the section consists of several compressed
1806 buffers concatenated together, so we uncompress in a loop. */
1810 strm.avail_in = compressed_size - header_size;
1811 strm.next_in = (Bytef*) compressed_buffer + header_size;
1812 strm.avail_out = uncompressed_size;
1813 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1815 rc = inflateInit (&strm);
1816 while (strm.avail_in > 0)
1819 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1820 bfd_get_filename (abfd), rc);
1821 strm.next_out = ((Bytef*) uncompressed_buffer
1822 + (uncompressed_size - strm.avail_out));
1823 rc = inflate (&strm, Z_FINISH);
1824 if (rc != Z_STREAM_END)
1825 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1826 bfd_get_filename (abfd), rc);
1827 rc = inflateReset (&strm);
1829 rc = inflateEnd (&strm);
1831 || strm.avail_out != 0)
1832 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1833 bfd_get_filename (abfd), rc);
1835 do_cleanups (cleanup);
1836 *outbuf = uncompressed_buffer;
1837 *outsize = uncompressed_size;
1841 /* A helper function that decides whether a section is empty,
1845 dwarf2_section_empty_p (struct dwarf2_section_info *info)
1847 return info->asection == NULL || info->size == 0;
1850 /* Read the contents of the section INFO.
1851 OBJFILE is the main object file, but not necessarily the file where
1852 the section comes from. E.g., for DWO files INFO->asection->owner
1853 is the bfd of the DWO file.
1854 If the section is compressed, uncompress it before returning. */
1857 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1859 asection *sectp = info->asection;
1861 gdb_byte *buf, *retbuf;
1862 unsigned char header[4];
1866 info->buffer = NULL;
1867 info->map_addr = NULL;
1870 if (dwarf2_section_empty_p (info))
1873 /* Note that ABFD may not be from OBJFILE, e.g. a DWO section. */
1874 abfd = sectp->owner;
1876 /* Check if the file has a 4-byte header indicating compression. */
1877 if (info->size > sizeof (header)
1878 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1879 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1881 /* Upon decompression, update the buffer and its size. */
1882 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1884 zlib_decompress_section (objfile, sectp, &info->buffer,
1892 pagesize = getpagesize ();
1894 /* Only try to mmap sections which are large enough: we don't want to
1895 waste space due to fragmentation. Also, only try mmap for sections
1896 without relocations. */
1898 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1900 info->buffer = bfd_mmap (abfd, 0, info->size, PROT_READ,
1901 MAP_PRIVATE, sectp->filepos,
1902 &info->map_addr, &info->map_len);
1904 if ((caddr_t)info->buffer != MAP_FAILED)
1906 #if HAVE_POSIX_MADVISE
1907 posix_madvise (info->map_addr, info->map_len, POSIX_MADV_WILLNEED);
1914 /* If we get here, we are a normal, not-compressed section. */
1916 = obstack_alloc (&objfile->objfile_obstack, info->size);
1918 /* When debugging .o files, we may need to apply relocations; see
1919 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1920 We never compress sections in .o files, so we only need to
1921 try this when the section is not compressed. */
1922 retbuf = symfile_relocate_debug_section (objfile, sectp, buf);
1925 info->buffer = retbuf;
1929 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1930 || bfd_bread (buf, info->size, abfd) != info->size)
1931 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1932 bfd_get_filename (abfd));
1935 /* A helper function that returns the size of a section in a safe way.
1936 If you are positive that the section has been read before using the
1937 size, then it is safe to refer to the dwarf2_section_info object's
1938 "size" field directly. In other cases, you must call this
1939 function, because for compressed sections the size field is not set
1940 correctly until the section has been read. */
1942 static bfd_size_type
1943 dwarf2_section_size (struct objfile *objfile,
1944 struct dwarf2_section_info *info)
1947 dwarf2_read_section (objfile, info);
1951 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1955 dwarf2_get_section_info (struct objfile *objfile,
1956 enum dwarf2_section_enum sect,
1957 asection **sectp, gdb_byte **bufp,
1958 bfd_size_type *sizep)
1960 struct dwarf2_per_objfile *data
1961 = objfile_data (objfile, dwarf2_objfile_data_key);
1962 struct dwarf2_section_info *info;
1964 /* We may see an objfile without any DWARF, in which case we just
1975 case DWARF2_DEBUG_FRAME:
1976 info = &data->frame;
1978 case DWARF2_EH_FRAME:
1979 info = &data->eh_frame;
1982 gdb_assert_not_reached ("unexpected section");
1985 dwarf2_read_section (objfile, info);
1987 *sectp = info->asection;
1988 *bufp = info->buffer;
1989 *sizep = info->size;
1993 /* DWARF quick_symbols_functions support. */
1995 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1996 unique line tables, so we maintain a separate table of all .debug_line
1997 derived entries to support the sharing.
1998 All the quick functions need is the list of file names. We discard the
1999 line_header when we're done and don't need to record it here. */
2000 struct quick_file_names
2002 /* The offset in .debug_line of the line table. We hash on this. */
2003 unsigned int offset;
2005 /* The number of entries in file_names, real_names. */
2006 unsigned int num_file_names;
2008 /* The file names from the line table, after being run through
2010 const char **file_names;
2012 /* The file names from the line table after being run through
2013 gdb_realpath. These are computed lazily. */
2014 const char **real_names;
2017 /* When using the index (and thus not using psymtabs), each CU has an
2018 object of this type. This is used to hold information needed by
2019 the various "quick" methods. */
2020 struct dwarf2_per_cu_quick_data
2022 /* The file table. This can be NULL if there was no file table
2023 or it's currently not read in.
2024 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2025 struct quick_file_names *file_names;
2027 /* The corresponding symbol table. This is NULL if symbols for this
2028 CU have not yet been read. */
2029 struct symtab *symtab;
2031 /* A temporary mark bit used when iterating over all CUs in
2032 expand_symtabs_matching. */
2033 unsigned int mark : 1;
2035 /* True if we've tried to read the file table and found there isn't one.
2036 There will be no point in trying to read it again next time. */
2037 unsigned int no_file_data : 1;
2040 /* Hash function for a quick_file_names. */
2043 hash_file_name_entry (const void *e)
2045 const struct quick_file_names *file_data = e;
2047 return file_data->offset;
2050 /* Equality function for a quick_file_names. */
2053 eq_file_name_entry (const void *a, const void *b)
2055 const struct quick_file_names *ea = a;
2056 const struct quick_file_names *eb = b;
2058 return ea->offset == eb->offset;
2061 /* Delete function for a quick_file_names. */
2064 delete_file_name_entry (void *e)
2066 struct quick_file_names *file_data = e;
2069 for (i = 0; i < file_data->num_file_names; ++i)
2071 xfree ((void*) file_data->file_names[i]);
2072 if (file_data->real_names)
2073 xfree ((void*) file_data->real_names[i]);
2076 /* The space for the struct itself lives on objfile_obstack,
2077 so we don't free it here. */
2080 /* Create a quick_file_names hash table. */
2083 create_quick_file_names_table (unsigned int nr_initial_entries)
2085 return htab_create_alloc (nr_initial_entries,
2086 hash_file_name_entry, eq_file_name_entry,
2087 delete_file_name_entry, xcalloc, xfree);
2090 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2091 have to be created afterwards. You should call age_cached_comp_units after
2092 processing PER_CU->CU. dw2_setup must have been already called. */
2095 load_cu (struct dwarf2_per_cu_data *per_cu)
2097 if (per_cu->is_debug_types)
2098 load_full_type_unit (per_cu);
2100 load_full_comp_unit (per_cu, language_minimal);
2102 gdb_assert (per_cu->cu != NULL);
2104 dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu);
2107 /* Read in the symbols for PER_CU. */
2110 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2112 struct cleanup *back_to;
2114 /* Skip type_unit_groups, reading the type units they contain
2115 is handled elsewhere. */
2116 if (IS_TYPE_UNIT_GROUP (per_cu))
2119 back_to = make_cleanup (dwarf2_release_queue, NULL);
2121 if (dwarf2_per_objfile->using_index
2122 ? per_cu->v.quick->symtab == NULL
2123 : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin))
2125 queue_comp_unit (per_cu, language_minimal);
2131 /* Age the cache, releasing compilation units that have not
2132 been used recently. */
2133 age_cached_comp_units ();
2135 do_cleanups (back_to);
2138 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2139 the objfile from which this CU came. Returns the resulting symbol
2142 static struct symtab *
2143 dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu)
2145 gdb_assert (dwarf2_per_objfile->using_index);
2146 if (!per_cu->v.quick->symtab)
2148 struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL);
2149 increment_reading_symtab ();
2150 dw2_do_instantiate_symtab (per_cu);
2151 process_cu_includes ();
2152 do_cleanups (back_to);
2154 return per_cu->v.quick->symtab;
2157 /* Return the CU given its index.
2159 This is intended for loops like:
2161 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2162 + dwarf2_per_objfile->n_type_units); ++i)
2164 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2170 static struct dwarf2_per_cu_data *
2171 dw2_get_cu (int index)
2173 if (index >= dwarf2_per_objfile->n_comp_units)
2175 struct dwarf2_per_cu_data *per_cu;
2177 index -= dwarf2_per_objfile->n_comp_units;
2178 per_cu = &dwarf2_per_objfile->all_type_units[index]->per_cu;
2179 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
2183 return dwarf2_per_objfile->all_comp_units[index];
2186 /* Return the primary CU given its index.
2187 The difference between this function and dw2_get_cu is in the handling
2188 of type units (TUs). Here we return the type_unit_group object.
2190 This is intended for loops like:
2192 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2193 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2195 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2201 static struct dwarf2_per_cu_data *
2202 dw2_get_primary_cu (int index)
2204 if (index >= dwarf2_per_objfile->n_comp_units)
2206 struct dwarf2_per_cu_data *per_cu;
2208 index -= dwarf2_per_objfile->n_comp_units;
2209 per_cu = dwarf2_per_objfile->all_type_unit_groups[index]->per_cu;
2210 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu));
2214 return dwarf2_per_objfile->all_comp_units[index];
2217 /* A helper function that knows how to read a 64-bit value in a way
2218 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
2222 extract_cu_value (const char *bytes, ULONGEST *result)
2224 if (sizeof (ULONGEST) < 8)
2228 /* Ignore the upper 4 bytes if they are all zero. */
2229 for (i = 0; i < 4; ++i)
2230 if (bytes[i + 4] != 0)
2233 *result = extract_unsigned_integer (bytes, 4, BFD_ENDIAN_LITTLE);
2236 *result = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE);
2240 /* Read the CU list from the mapped index, and use it to create all
2241 the CU objects for this objfile. Return 0 if something went wrong,
2242 1 if everything went ok. */
2245 create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
2246 offset_type cu_list_elements)
2250 dwarf2_per_objfile->n_comp_units = cu_list_elements / 2;
2251 dwarf2_per_objfile->all_comp_units
2252 = obstack_alloc (&objfile->objfile_obstack,
2253 dwarf2_per_objfile->n_comp_units
2254 * sizeof (struct dwarf2_per_cu_data *));
2256 for (i = 0; i < cu_list_elements; i += 2)
2258 struct dwarf2_per_cu_data *the_cu;
2259 ULONGEST offset, length;
2261 if (!extract_cu_value (cu_list, &offset)
2262 || !extract_cu_value (cu_list + 8, &length))
2266 the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2267 struct dwarf2_per_cu_data);
2268 the_cu->offset.sect_off = offset;
2269 the_cu->length = length;
2270 the_cu->objfile = objfile;
2271 the_cu->info_or_types_section = &dwarf2_per_objfile->info;
2272 the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2273 struct dwarf2_per_cu_quick_data);
2274 dwarf2_per_objfile->all_comp_units[i / 2] = the_cu;
2280 /* Create the signatured type hash table from the index. */
2283 create_signatured_type_table_from_index (struct objfile *objfile,
2284 struct dwarf2_section_info *section,
2285 const gdb_byte *bytes,
2286 offset_type elements)
2289 htab_t sig_types_hash;
2291 dwarf2_per_objfile->n_type_units = elements / 3;
2292 dwarf2_per_objfile->all_type_units
2293 = obstack_alloc (&objfile->objfile_obstack,
2294 dwarf2_per_objfile->n_type_units
2295 * sizeof (struct signatured_type *));
2297 sig_types_hash = allocate_signatured_type_table (objfile);
2299 for (i = 0; i < elements; i += 3)
2301 struct signatured_type *sig_type;
2302 ULONGEST offset, type_offset_in_tu, signature;
2305 if (!extract_cu_value (bytes, &offset)
2306 || !extract_cu_value (bytes + 8, &type_offset_in_tu))
2308 signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE);
2311 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2312 struct signatured_type);
2313 sig_type->signature = signature;
2314 sig_type->type_offset_in_tu.cu_off = type_offset_in_tu;
2315 sig_type->per_cu.is_debug_types = 1;
2316 sig_type->per_cu.info_or_types_section = section;
2317 sig_type->per_cu.offset.sect_off = offset;
2318 sig_type->per_cu.objfile = objfile;
2319 sig_type->per_cu.v.quick
2320 = OBSTACK_ZALLOC (&objfile->objfile_obstack,
2321 struct dwarf2_per_cu_quick_data);
2323 slot = htab_find_slot (sig_types_hash, sig_type, INSERT);
2326 dwarf2_per_objfile->all_type_units[i / 3] = sig_type;
2329 dwarf2_per_objfile->signatured_types = sig_types_hash;
2334 /* Read the address map data from the mapped index, and use it to
2335 populate the objfile's psymtabs_addrmap. */
2338 create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index)
2340 const gdb_byte *iter, *end;
2341 struct obstack temp_obstack;
2342 struct addrmap *mutable_map;
2343 struct cleanup *cleanup;
2346 obstack_init (&temp_obstack);
2347 cleanup = make_cleanup_obstack_free (&temp_obstack);
2348 mutable_map = addrmap_create_mutable (&temp_obstack);
2350 iter = index->address_table;
2351 end = iter + index->address_table_size;
2353 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2357 ULONGEST hi, lo, cu_index;
2358 lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2360 hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE);
2362 cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE);
2365 addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1,
2366 dw2_get_cu (cu_index));
2369 objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map,
2370 &objfile->objfile_obstack);
2371 do_cleanups (cleanup);
2374 /* The hash function for strings in the mapped index. This is the same as
2375 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2376 implementation. This is necessary because the hash function is tied to the
2377 format of the mapped index file. The hash values do not have to match with
2380 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2383 mapped_index_string_hash (int index_version, const void *p)
2385 const unsigned char *str = (const unsigned char *) p;
2389 while ((c = *str++) != 0)
2391 if (index_version >= 5)
2393 r = r * 67 + c - 113;
2399 /* Find a slot in the mapped index INDEX for the object named NAME.
2400 If NAME is found, set *VEC_OUT to point to the CU vector in the
2401 constant pool and return 1. If NAME cannot be found, return 0. */
2404 find_slot_in_mapped_hash (struct mapped_index *index, const char *name,
2405 offset_type **vec_out)
2407 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2409 offset_type slot, step;
2410 int (*cmp) (const char *, const char *);
2412 if (current_language->la_language == language_cplus
2413 || current_language->la_language == language_java
2414 || current_language->la_language == language_fortran)
2416 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2418 const char *paren = strchr (name, '(');
2424 dup = xmalloc (paren - name + 1);
2425 memcpy (dup, name, paren - name);
2426 dup[paren - name] = 0;
2428 make_cleanup (xfree, dup);
2433 /* Index version 4 did not support case insensitive searches. But the
2434 indices for case insensitive languages are built in lowercase, therefore
2435 simulate our NAME being searched is also lowercased. */
2436 hash = mapped_index_string_hash ((index->version == 4
2437 && case_sensitivity == case_sensitive_off
2438 ? 5 : index->version),
2441 slot = hash & (index->symbol_table_slots - 1);
2442 step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1;
2443 cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp);
2447 /* Convert a slot number to an offset into the table. */
2448 offset_type i = 2 * slot;
2450 if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0)
2452 do_cleanups (back_to);
2456 str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]);
2457 if (!cmp (name, str))
2459 *vec_out = (offset_type *) (index->constant_pool
2460 + MAYBE_SWAP (index->symbol_table[i + 1]));
2461 do_cleanups (back_to);
2465 slot = (slot + step) & (index->symbol_table_slots - 1);
2469 /* Read the index file. If everything went ok, initialize the "quick"
2470 elements of all the CUs and return 1. Otherwise, return 0. */
2473 dwarf2_read_index (struct objfile *objfile)
2476 struct mapped_index *map;
2477 offset_type *metadata;
2478 const gdb_byte *cu_list;
2479 const gdb_byte *types_list = NULL;
2480 offset_type version, cu_list_elements;
2481 offset_type types_list_elements = 0;
2484 if (dwarf2_section_empty_p (&dwarf2_per_objfile->gdb_index))
2487 /* Older elfutils strip versions could keep the section in the main
2488 executable while splitting it for the separate debug info file. */
2489 if ((bfd_get_file_flags (dwarf2_per_objfile->gdb_index.asection)
2490 & SEC_HAS_CONTENTS) == 0)
2493 dwarf2_read_section (objfile, &dwarf2_per_objfile->gdb_index);
2495 addr = dwarf2_per_objfile->gdb_index.buffer;
2496 /* Version check. */
2497 version = MAYBE_SWAP (*(offset_type *) addr);
2498 /* Versions earlier than 3 emitted every copy of a psymbol. This
2499 causes the index to behave very poorly for certain requests. Version 3
2500 contained incomplete addrmap. So, it seems better to just ignore such
2504 static int warning_printed = 0;
2505 if (!warning_printed)
2507 warning (_("Skipping obsolete .gdb_index section in %s."),
2509 warning_printed = 1;
2513 /* Index version 4 uses a different hash function than index version
2516 Versions earlier than 6 did not emit psymbols for inlined
2517 functions. Using these files will cause GDB not to be able to
2518 set breakpoints on inlined functions by name, so we ignore these
2519 indices unless the --use-deprecated-index-sections command line
2520 option was supplied. */
2521 if (version < 6 && !use_deprecated_index_sections)
2523 static int warning_printed = 0;
2524 if (!warning_printed)
2526 warning (_("Skipping deprecated .gdb_index section in %s, pass "
2527 "--use-deprecated-index-sections to use them anyway"),
2529 warning_printed = 1;
2533 /* Indexes with higher version than the one supported by GDB may be no
2534 longer backward compatible. */
2538 map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
2539 map->version = version;
2540 map->total_size = dwarf2_per_objfile->gdb_index.size;
2542 metadata = (offset_type *) (addr + sizeof (offset_type));
2545 cu_list = addr + MAYBE_SWAP (metadata[i]);
2546 cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i]))
2550 types_list = addr + MAYBE_SWAP (metadata[i]);
2551 types_list_elements = ((MAYBE_SWAP (metadata[i + 1])
2552 - MAYBE_SWAP (metadata[i]))
2556 map->address_table = addr + MAYBE_SWAP (metadata[i]);
2557 map->address_table_size = (MAYBE_SWAP (metadata[i + 1])
2558 - MAYBE_SWAP (metadata[i]));
2561 map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i]));
2562 map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1])
2563 - MAYBE_SWAP (metadata[i]))
2564 / (2 * sizeof (offset_type)));
2567 map->constant_pool = addr + MAYBE_SWAP (metadata[i]);
2569 /* Don't use the index if it's empty. */
2570 if (map->symbol_table_slots == 0)
2573 if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
2576 if (types_list_elements)
2578 struct dwarf2_section_info *section;
2580 /* We can only handle a single .debug_types when we have an
2582 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1)
2585 section = VEC_index (dwarf2_section_info_def,
2586 dwarf2_per_objfile->types, 0);
2588 if (!create_signatured_type_table_from_index (objfile, section,
2590 types_list_elements))
2594 create_addrmap_from_index (objfile, map);
2596 dwarf2_per_objfile->index_table = map;
2597 dwarf2_per_objfile->using_index = 1;
2598 dwarf2_per_objfile->quick_file_names_table =
2599 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
2604 /* A helper for the "quick" functions which sets the global
2605 dwarf2_per_objfile according to OBJFILE. */
2608 dw2_setup (struct objfile *objfile)
2610 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
2611 gdb_assert (dwarf2_per_objfile);
2614 /* Reader function for dw2_build_type_unit_groups. */
2617 dw2_build_type_unit_groups_reader (const struct die_reader_specs *reader,
2619 struct die_info *type_unit_die,
2623 struct dwarf2_cu *cu = reader->cu;
2624 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
2625 struct attribute *attr;
2626 struct type_unit_group *tu_group;
2628 gdb_assert (data == NULL);
2633 attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
2634 /* Call this for its side-effect of creating the associated
2635 struct type_unit_group if it doesn't already exist. */
2636 tu_group = get_type_unit_group (per_cu, attr);
2639 /* Build dwarf2_per_objfile->type_unit_groups.
2640 This function may be called multiple times. */
2643 dw2_build_type_unit_groups (void)
2645 if (dwarf2_per_objfile->type_unit_groups == NULL)
2646 build_type_unit_groups (dw2_build_type_unit_groups_reader, NULL);
2649 /* die_reader_func for dw2_get_file_names. */
2652 dw2_get_file_names_reader (const struct die_reader_specs *reader,
2654 struct die_info *comp_unit_die,
2658 struct dwarf2_cu *cu = reader->cu;
2659 struct dwarf2_per_cu_data *this_cu = cu->per_cu;
2660 struct objfile *objfile = dwarf2_per_objfile->objfile;
2661 struct line_header *lh;
2662 struct attribute *attr;
2664 char *name, *comp_dir;
2666 struct quick_file_names *qfn;
2667 unsigned int line_offset;
2669 /* Our callers never want to match partial units -- instead they
2670 will match the enclosing full CU. */
2671 if (comp_unit_die->tag == DW_TAG_partial_unit)
2673 this_cu->v.quick->no_file_data = 1;
2681 attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
2684 struct quick_file_names find_entry;
2686 line_offset = DW_UNSND (attr);
2688 /* We may have already read in this line header (TU line header sharing).
2689 If we have we're done. */
2690 find_entry.offset = line_offset;
2691 slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
2692 &find_entry, INSERT);
2695 this_cu->v.quick->file_names = *slot;
2699 lh = dwarf_decode_line_header (line_offset, cu);
2703 this_cu->v.quick->no_file_data = 1;
2707 qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
2708 qfn->offset = line_offset;
2709 gdb_assert (slot != NULL);
2712 find_file_and_directory (comp_unit_die, cu, &name, &comp_dir);
2714 qfn->num_file_names = lh->num_file_names;
2715 qfn->file_names = obstack_alloc (&objfile->objfile_obstack,
2716 lh->num_file_names * sizeof (char *));
2717 for (i = 0; i < lh->num_file_names; ++i)
2718 qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir);
2719 qfn->real_names = NULL;
2721 free_line_header (lh);
2723 this_cu->v.quick->file_names = qfn;
2726 /* A helper for the "quick" functions which attempts to read the line
2727 table for THIS_CU. */
2729 static struct quick_file_names *
2730 dw2_get_file_names (struct objfile *objfile,
2731 struct dwarf2_per_cu_data *this_cu)
2733 /* For TUs this should only be called on the parent group. */
2734 if (this_cu->is_debug_types)
2735 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu));
2737 if (this_cu->v.quick->file_names != NULL)
2738 return this_cu->v.quick->file_names;
2739 /* If we know there is no line data, no point in looking again. */
2740 if (this_cu->v.quick->no_file_data)
2743 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2744 in the stub for CUs, there's is no need to lookup the DWO file.
2745 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2747 if (this_cu->is_debug_types)
2748 init_cutu_and_read_dies (this_cu, NULL, 0, 0,
2749 dw2_get_file_names_reader, NULL);
2751 init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
2753 if (this_cu->v.quick->no_file_data)
2755 return this_cu->v.quick->file_names;
2758 /* A helper for the "quick" functions which computes and caches the
2759 real path for a given file name from the line table. */
2762 dw2_get_real_path (struct objfile *objfile,
2763 struct quick_file_names *qfn, int index)
2765 if (qfn->real_names == NULL)
2766 qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack,
2767 qfn->num_file_names, sizeof (char *));
2769 if (qfn->real_names[index] == NULL)
2770 qfn->real_names[index] = gdb_realpath (qfn->file_names[index]);
2772 return qfn->real_names[index];
2775 static struct symtab *
2776 dw2_find_last_source_symtab (struct objfile *objfile)
2780 dw2_setup (objfile);
2781 index = dwarf2_per_objfile->n_comp_units - 1;
2782 return dw2_instantiate_symtab (dw2_get_cu (index));
2785 /* Traversal function for dw2_forget_cached_source_info. */
2788 dw2_free_cached_file_names (void **slot, void *info)
2790 struct quick_file_names *file_data = (struct quick_file_names *) *slot;
2792 if (file_data->real_names)
2796 for (i = 0; i < file_data->num_file_names; ++i)
2798 xfree ((void*) file_data->real_names[i]);
2799 file_data->real_names[i] = NULL;
2807 dw2_forget_cached_source_info (struct objfile *objfile)
2809 dw2_setup (objfile);
2811 htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table,
2812 dw2_free_cached_file_names, NULL);
2815 /* Helper function for dw2_map_symtabs_matching_filename that expands
2816 the symtabs and calls the iterator. */
2819 dw2_map_expand_apply (struct objfile *objfile,
2820 struct dwarf2_per_cu_data *per_cu,
2822 const char *full_path, const char *real_path,
2823 int (*callback) (struct symtab *, void *),
2826 struct symtab *last_made = objfile->symtabs;
2828 /* Don't visit already-expanded CUs. */
2829 if (per_cu->v.quick->symtab)
2832 /* This may expand more than one symtab, and we want to iterate over
2834 dw2_instantiate_symtab (per_cu);
2836 return iterate_over_some_symtabs (name, full_path, real_path, callback, data,
2837 objfile->symtabs, last_made);
2840 /* Implementation of the map_symtabs_matching_filename method. */
2843 dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name,
2844 const char *full_path, const char *real_path,
2845 int (*callback) (struct symtab *, void *),
2849 const char *name_basename = lbasename (name);
2850 int name_len = strlen (name);
2851 int is_abs = IS_ABSOLUTE_PATH (name);
2853 dw2_setup (objfile);
2855 dw2_build_type_unit_groups ();
2857 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2858 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2861 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2862 struct quick_file_names *file_data;
2864 /* We only need to look at symtabs not already expanded. */
2865 if (per_cu->v.quick->symtab)
2868 file_data = dw2_get_file_names (objfile, per_cu);
2869 if (file_data == NULL)
2872 for (j = 0; j < file_data->num_file_names; ++j)
2874 const char *this_name = file_data->file_names[j];
2876 if (FILENAME_CMP (name, this_name) == 0
2877 || (!is_abs && compare_filenames_for_search (this_name,
2880 if (dw2_map_expand_apply (objfile, per_cu,
2881 name, full_path, real_path,
2886 /* Before we invoke realpath, which can get expensive when many
2887 files are involved, do a quick comparison of the basenames. */
2888 if (! basenames_may_differ
2889 && FILENAME_CMP (lbasename (this_name), name_basename) != 0)
2892 if (full_path != NULL)
2894 const char *this_real_name = dw2_get_real_path (objfile,
2897 if (this_real_name != NULL
2898 && (FILENAME_CMP (full_path, this_real_name) == 0
2900 && compare_filenames_for_search (this_real_name,
2903 if (dw2_map_expand_apply (objfile, per_cu,
2904 name, full_path, real_path,
2910 if (real_path != NULL)
2912 const char *this_real_name = dw2_get_real_path (objfile,
2915 if (this_real_name != NULL
2916 && (FILENAME_CMP (real_path, this_real_name) == 0
2918 && compare_filenames_for_search (this_real_name,
2921 if (dw2_map_expand_apply (objfile, per_cu,
2922 name, full_path, real_path,
2933 static struct symtab *
2934 dw2_lookup_symbol (struct objfile *objfile, int block_index,
2935 const char *name, domain_enum domain)
2937 /* We do all the work in the pre_expand_symtabs_matching hook
2942 /* A helper function that expands all symtabs that hold an object
2943 named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
2944 symbols in block BLOCK_KIND. */
2947 dw2_do_expand_symtabs_matching (struct objfile *objfile,
2948 int want_specific_block,
2949 enum block_enum block_kind,
2950 const char *name, domain_enum domain)
2952 struct mapped_index *index;
2954 dw2_setup (objfile);
2956 index = dwarf2_per_objfile->index_table;
2958 /* index_table is NULL if OBJF_READNOW. */
2963 if (find_slot_in_mapped_hash (index, name, &vec))
2965 offset_type i, len = MAYBE_SWAP (*vec);
2966 for (i = 0; i < len; ++i)
2968 offset_type cu_index_and_attrs = MAYBE_SWAP (vec[i + 1]);
2969 offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
2970 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index);
2971 int want_static = block_kind != GLOBAL_BLOCK;
2972 /* This value is only valid for index versions >= 7. */
2973 int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs);
2974 gdb_index_symbol_kind symbol_kind =
2975 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
2977 if (want_specific_block
2978 && index->version >= 7
2979 && want_static != is_static)
2982 /* Only check the symbol's kind if it has one.
2983 Indices prior to version 7 don't record it. */
2984 if (index->version >= 7)
2989 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE
2990 && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION
2991 /* Some types are also in VAR_DOMAIN. */
2992 && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
2996 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3000 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER)
3008 dw2_instantiate_symtab (per_cu);
3015 dw2_pre_expand_symtabs_matching (struct objfile *objfile,
3016 enum block_enum block_kind, const char *name,
3019 dw2_do_expand_symtabs_matching (objfile, 1, block_kind, name, domain);
3023 dw2_print_stats (struct objfile *objfile)
3027 dw2_setup (objfile);
3029 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3030 + dwarf2_per_objfile->n_type_units); ++i)
3032 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3034 if (!per_cu->v.quick->symtab)
3037 printf_filtered (_(" Number of unread CUs: %d\n"), count);
3041 dw2_dump (struct objfile *objfile)
3043 /* Nothing worth printing. */
3047 dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets,
3048 struct section_offsets *delta)
3050 /* There's nothing to relocate here. */
3054 dw2_expand_symtabs_for_function (struct objfile *objfile,
3055 const char *func_name)
3057 /* Note: It doesn't matter what we pass for block_kind here. */
3058 dw2_do_expand_symtabs_matching (objfile, 0, GLOBAL_BLOCK, func_name,
3063 dw2_expand_all_symtabs (struct objfile *objfile)
3067 dw2_setup (objfile);
3069 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3070 + dwarf2_per_objfile->n_type_units); ++i)
3072 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3074 dw2_instantiate_symtab (per_cu);
3079 dw2_expand_symtabs_with_filename (struct objfile *objfile,
3080 const char *filename)
3084 dw2_setup (objfile);
3086 /* We don't need to consider type units here.
3087 This is only called for examining code, e.g. expand_line_sal.
3088 There can be an order of magnitude (or more) more type units
3089 than comp units, and we avoid them if we can. */
3091 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
3094 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3095 struct quick_file_names *file_data;
3097 /* We only need to look at symtabs not already expanded. */
3098 if (per_cu->v.quick->symtab)
3101 file_data = dw2_get_file_names (objfile, per_cu);
3102 if (file_data == NULL)
3105 for (j = 0; j < file_data->num_file_names; ++j)
3107 const char *this_name = file_data->file_names[j];
3108 if (FILENAME_CMP (this_name, filename) == 0)
3110 dw2_instantiate_symtab (per_cu);
3117 /* A helper function for dw2_find_symbol_file that finds the primary
3118 file name for a given CU. This is a die_reader_func. */
3121 dw2_get_primary_filename_reader (const struct die_reader_specs *reader,
3123 struct die_info *comp_unit_die,
3127 const char **result_ptr = data;
3128 struct dwarf2_cu *cu = reader->cu;
3129 struct attribute *attr;
3131 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
3135 *result_ptr = DW_STRING (attr);
3139 dw2_find_symbol_file (struct objfile *objfile, const char *name)
3141 struct dwarf2_per_cu_data *per_cu;
3143 struct quick_file_names *file_data;
3144 const char *filename;
3146 dw2_setup (objfile);
3148 /* index_table is NULL if OBJF_READNOW. */
3149 if (!dwarf2_per_objfile->index_table)
3153 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
3155 struct blockvector *bv = BLOCKVECTOR (s);
3156 const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
3157 struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN);
3160 return sym->symtab->filename;
3165 if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table,
3169 /* Note that this just looks at the very first one named NAME -- but
3170 actually we are looking for a function. find_main_filename
3171 should be rewritten so that it doesn't require a custom hook. It
3172 could just use the ordinary symbol tables. */
3173 /* vec[0] is the length, which must always be >0. */
3174 per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1])));
3176 if (per_cu->v.quick->symtab != NULL)
3177 return per_cu->v.quick->symtab->filename;
3179 init_cutu_and_read_dies (per_cu, NULL, 0, 0,
3180 dw2_get_primary_filename_reader, &filename);
3186 dw2_map_matching_symbols (const char * name, domain_enum namespace,
3187 struct objfile *objfile, int global,
3188 int (*callback) (struct block *,
3189 struct symbol *, void *),
3190 void *data, symbol_compare_ftype *match,
3191 symbol_compare_ftype *ordered_compare)
3193 /* Currently unimplemented; used for Ada. The function can be called if the
3194 current language is Ada for a non-Ada objfile using GNU index. As Ada
3195 does not look for non-Ada symbols this function should just return. */
3199 dw2_expand_symtabs_matching
3200 (struct objfile *objfile,
3201 int (*file_matcher) (const char *, void *),
3202 int (*name_matcher) (const char *, void *),
3203 enum search_domain kind,
3208 struct mapped_index *index;
3210 dw2_setup (objfile);
3212 /* index_table is NULL if OBJF_READNOW. */
3213 if (!dwarf2_per_objfile->index_table)
3215 index = dwarf2_per_objfile->index_table;
3217 if (file_matcher != NULL)
3219 struct cleanup *cleanup;
3220 htab_t visited_found, visited_not_found;
3222 dw2_build_type_unit_groups ();
3224 visited_found = htab_create_alloc (10,
3225 htab_hash_pointer, htab_eq_pointer,
3226 NULL, xcalloc, xfree);
3227 cleanup = make_cleanup_htab_delete (visited_found);
3228 visited_not_found = htab_create_alloc (10,
3229 htab_hash_pointer, htab_eq_pointer,
3230 NULL, xcalloc, xfree);
3231 make_cleanup_htab_delete (visited_not_found);
3233 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3234 + dwarf2_per_objfile->n_type_unit_groups); ++i)
3237 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3238 struct quick_file_names *file_data;
3241 per_cu->v.quick->mark = 0;
3243 /* We only need to look at symtabs not already expanded. */
3244 if (per_cu->v.quick->symtab)
3247 file_data = dw2_get_file_names (objfile, per_cu);
3248 if (file_data == NULL)
3251 if (htab_find (visited_not_found, file_data) != NULL)
3253 else if (htab_find (visited_found, file_data) != NULL)
3255 per_cu->v.quick->mark = 1;
3259 for (j = 0; j < file_data->num_file_names; ++j)
3261 if (file_matcher (file_data->file_names[j], data))
3263 per_cu->v.quick->mark = 1;
3268 slot = htab_find_slot (per_cu->v.quick->mark
3270 : visited_not_found,
3275 do_cleanups (cleanup);
3278 for (iter = 0; iter < index->symbol_table_slots; ++iter)
3280 offset_type idx = 2 * iter;
3282 offset_type *vec, vec_len, vec_idx;
3284 if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0)
3287 name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]);
3289 if (! (*name_matcher) (name, data))
3292 /* The name was matched, now expand corresponding CUs that were
3294 vec = (offset_type *) (index->constant_pool
3295 + MAYBE_SWAP (index->symbol_table[idx + 1]));
3296 vec_len = MAYBE_SWAP (vec[0]);
3297 for (vec_idx = 0; vec_idx < vec_len; ++vec_idx)
3299 struct dwarf2_per_cu_data *per_cu;
3300 offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]);
3301 gdb_index_symbol_kind symbol_kind =
3302 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs);
3303 int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs);
3305 /* Don't crash on bad data. */
3306 if (cu_index >= (dwarf2_per_objfile->n_comp_units
3307 + dwarf2_per_objfile->n_type_units))
3310 /* Only check the symbol's kind if it has one.
3311 Indices prior to version 7 don't record it. */
3312 if (index->version >= 7)
3316 case VARIABLES_DOMAIN:
3317 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE)
3320 case FUNCTIONS_DOMAIN:
3321 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION)
3325 if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE)
3333 per_cu = dw2_get_cu (cu_index);
3334 if (file_matcher == NULL || per_cu->v.quick->mark)
3335 dw2_instantiate_symtab (per_cu);
3340 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3343 static struct symtab *
3344 recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc)
3348 if (BLOCKVECTOR (symtab) != NULL
3349 && blockvector_contains_pc (BLOCKVECTOR (symtab), pc))
3352 if (symtab->includes == NULL)
3355 for (i = 0; symtab->includes[i]; ++i)
3357 struct symtab *s = symtab->includes[i];
3359 s = recursively_find_pc_sect_symtab (s, pc);
3367 static struct symtab *
3368 dw2_find_pc_sect_symtab (struct objfile *objfile,
3369 struct minimal_symbol *msymbol,
3371 struct obj_section *section,
3374 struct dwarf2_per_cu_data *data;
3375 struct symtab *result;
3377 dw2_setup (objfile);
3379 if (!objfile->psymtabs_addrmap)
3382 data = addrmap_find (objfile->psymtabs_addrmap, pc);
3386 if (warn_if_readin && data->v.quick->symtab)
3387 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3388 paddress (get_objfile_arch (objfile), pc));
3390 result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc);
3391 gdb_assert (result != NULL);
3396 dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun,
3397 void *data, int need_fullname)
3400 struct cleanup *cleanup;
3401 htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer,
3402 NULL, xcalloc, xfree);
3404 cleanup = make_cleanup_htab_delete (visited);
3405 dw2_setup (objfile);
3407 dw2_build_type_unit_groups ();
3409 /* We can ignore file names coming from already-expanded CUs. */
3410 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3411 + dwarf2_per_objfile->n_type_units); ++i)
3413 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3415 if (per_cu->v.quick->symtab)
3417 void **slot = htab_find_slot (visited, per_cu->v.quick->file_names,
3420 *slot = per_cu->v.quick->file_names;
3424 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3425 + dwarf2_per_objfile->n_type_unit_groups); ++i)
3428 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
3429 struct quick_file_names *file_data;
3432 /* We only need to look at symtabs not already expanded. */
3433 if (per_cu->v.quick->symtab)
3436 file_data = dw2_get_file_names (objfile, per_cu);
3437 if (file_data == NULL)
3440 slot = htab_find_slot (visited, file_data, INSERT);
3443 /* Already visited. */
3448 for (j = 0; j < file_data->num_file_names; ++j)
3450 const char *this_real_name;
3453 this_real_name = dw2_get_real_path (objfile, file_data, j);
3455 this_real_name = NULL;
3456 (*fun) (file_data->file_names[j], this_real_name, data);
3460 do_cleanups (cleanup);
3464 dw2_has_symbols (struct objfile *objfile)
3469 const struct quick_symbol_functions dwarf2_gdb_index_functions =
3472 dw2_find_last_source_symtab,
3473 dw2_forget_cached_source_info,
3474 dw2_map_symtabs_matching_filename,
3476 dw2_pre_expand_symtabs_matching,
3480 dw2_expand_symtabs_for_function,
3481 dw2_expand_all_symtabs,
3482 dw2_expand_symtabs_with_filename,
3483 dw2_find_symbol_file,
3484 dw2_map_matching_symbols,
3485 dw2_expand_symtabs_matching,
3486 dw2_find_pc_sect_symtab,
3487 dw2_map_symbol_filenames
3490 /* Initialize for reading DWARF for this objfile. Return 0 if this
3491 file will use psymtabs, or 1 if using the GNU index. */
3494 dwarf2_initialize_objfile (struct objfile *objfile)
3496 /* If we're about to read full symbols, don't bother with the
3497 indices. In this case we also don't care if some other debug
3498 format is making psymtabs, because they are all about to be
3500 if ((objfile->flags & OBJF_READNOW))
3504 dwarf2_per_objfile->using_index = 1;
3505 create_all_comp_units (objfile);
3506 create_all_type_units (objfile);
3507 dwarf2_per_objfile->quick_file_names_table =
3508 create_quick_file_names_table (dwarf2_per_objfile->n_comp_units);
3510 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3511 + dwarf2_per_objfile->n_type_units); ++i)
3513 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
3515 per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
3516 struct dwarf2_per_cu_quick_data);
3519 /* Return 1 so that gdb sees the "quick" functions. However,
3520 these functions will be no-ops because we will have expanded
3525 if (dwarf2_read_index (objfile))
3533 /* Build a partial symbol table. */
3536 dwarf2_build_psymtabs (struct objfile *objfile)
3538 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
3540 init_psymbol_list (objfile, 1024);
3543 dwarf2_build_psymtabs_hard (objfile);
3546 /* Return the total length of the CU described by HEADER. */
3549 get_cu_length (const struct comp_unit_head *header)
3551 return header->initial_length_size + header->length;
3554 /* Return TRUE if OFFSET is within CU_HEADER. */
3557 offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset)
3559 sect_offset bottom = { cu_header->offset.sect_off };
3560 sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) };
3562 return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off);
3565 /* Find the base address of the compilation unit for range lists and
3566 location lists. It will normally be specified by DW_AT_low_pc.
3567 In DWARF-3 draft 4, the base address could be overridden by
3568 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3569 compilation units with discontinuous ranges. */
3572 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
3574 struct attribute *attr;
3577 cu->base_address = 0;
3579 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
3582 cu->base_address = DW_ADDR (attr);
3587 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3590 cu->base_address = DW_ADDR (attr);
3596 /* Read in the comp unit header information from the debug_info at info_ptr.
3597 NOTE: This leaves members offset, first_die_offset to be filled in
3601 read_comp_unit_head (struct comp_unit_head *cu_header,
3602 gdb_byte *info_ptr, bfd *abfd)
3605 unsigned int bytes_read;
3607 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
3608 cu_header->initial_length_size = bytes_read;
3609 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
3610 info_ptr += bytes_read;
3611 cu_header->version = read_2_bytes (abfd, info_ptr);
3613 cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header,
3615 info_ptr += bytes_read;
3616 cu_header->addr_size = read_1_byte (abfd, info_ptr);
3618 signed_addr = bfd_get_sign_extend_vma (abfd);
3619 if (signed_addr < 0)
3620 internal_error (__FILE__, __LINE__,
3621 _("read_comp_unit_head: dwarf from non elf file"));
3622 cu_header->signed_addr_p = signed_addr;
3627 /* Subroutine of read_and_check_comp_unit_head and
3628 read_and_check_type_unit_head to simplify them.
3629 Perform various error checking on the header. */
3632 error_check_comp_unit_head (struct comp_unit_head *header,
3633 struct dwarf2_section_info *section,
3634 struct dwarf2_section_info *abbrev_section)
3636 bfd *abfd = section->asection->owner;
3637 const char *filename = bfd_get_filename (abfd);
3639 if (header->version != 2 && header->version != 3 && header->version != 4)
3640 error (_("Dwarf Error: wrong version in compilation unit header "
3641 "(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
3644 if (header->abbrev_offset.sect_off
3645 >= dwarf2_section_size (dwarf2_per_objfile->objfile,
3646 &dwarf2_per_objfile->abbrev))
3647 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3648 "(offset 0x%lx + 6) [in module %s]"),
3649 (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off,
3652 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3653 avoid potential 32-bit overflow. */
3654 if (((unsigned long) header->offset.sect_off + get_cu_length (header))
3656 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3657 "(offset 0x%lx + 0) [in module %s]"),
3658 (long) header->length, (long) header->offset.sect_off,
3662 /* Read in a CU/TU header and perform some basic error checking.
3663 The contents of the header are stored in HEADER.
3664 The result is a pointer to the start of the first DIE. */
3667 read_and_check_comp_unit_head (struct comp_unit_head *header,
3668 struct dwarf2_section_info *section,
3669 struct dwarf2_section_info *abbrev_section,
3671 int is_debug_types_section)
3673 gdb_byte *beg_of_comp_unit = info_ptr;
3674 bfd *abfd = section->asection->owner;
3676 header->offset.sect_off = beg_of_comp_unit - section->buffer;
3678 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
3680 /* If we're reading a type unit, skip over the signature and
3681 type_offset fields. */
3682 if (is_debug_types_section)
3683 info_ptr += 8 /*signature*/ + header->offset_size;
3685 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
3687 error_check_comp_unit_head (header, section, abbrev_section);
3692 /* Read in the types comp unit header information from .debug_types entry at
3693 types_ptr. The result is a pointer to one past the end of the header. */
3696 read_and_check_type_unit_head (struct comp_unit_head *header,
3697 struct dwarf2_section_info *section,
3698 struct dwarf2_section_info *abbrev_section,
3700 ULONGEST *signature,
3701 cu_offset *type_offset_in_tu)
3703 gdb_byte *beg_of_comp_unit = info_ptr;
3704 bfd *abfd = section->asection->owner;
3706 header->offset.sect_off = beg_of_comp_unit - section->buffer;
3708 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
3710 /* If we're reading a type unit, skip over the signature and
3711 type_offset fields. */
3712 if (signature != NULL)
3713 *signature = read_8_bytes (abfd, info_ptr);
3715 if (type_offset_in_tu != NULL)
3716 type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr,
3717 header->offset_size);
3718 info_ptr += header->offset_size;
3720 header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit;
3722 error_check_comp_unit_head (header, section, abbrev_section);
3727 /* Fetch the abbreviation table offset from a comp or type unit header. */
3730 read_abbrev_offset (struct dwarf2_section_info *section,
3733 bfd *abfd = section->asection->owner;
3735 unsigned int length, initial_length_size, offset_size;
3736 sect_offset abbrev_offset;
3738 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
3739 info_ptr = section->buffer + offset.sect_off;
3740 length = read_initial_length (abfd, info_ptr, &initial_length_size);
3741 offset_size = initial_length_size == 4 ? 4 : 8;
3742 info_ptr += initial_length_size + 2 /*version*/;
3743 abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size);
3744 return abbrev_offset;
3747 /* Allocate a new partial symtab for file named NAME and mark this new
3748 partial symtab as being an include of PST. */
3751 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
3752 struct objfile *objfile)
3754 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
3756 subpst->section_offsets = pst->section_offsets;
3757 subpst->textlow = 0;
3758 subpst->texthigh = 0;
3760 subpst->dependencies = (struct partial_symtab **)
3761 obstack_alloc (&objfile->objfile_obstack,
3762 sizeof (struct partial_symtab *));
3763 subpst->dependencies[0] = pst;
3764 subpst->number_of_dependencies = 1;
3766 subpst->globals_offset = 0;
3767 subpst->n_global_syms = 0;
3768 subpst->statics_offset = 0;
3769 subpst->n_static_syms = 0;
3770 subpst->symtab = NULL;
3771 subpst->read_symtab = pst->read_symtab;
3774 /* No private part is necessary for include psymtabs. This property
3775 can be used to differentiate between such include psymtabs and
3776 the regular ones. */
3777 subpst->read_symtab_private = NULL;
3780 /* Read the Line Number Program data and extract the list of files
3781 included by the source file represented by PST. Build an include
3782 partial symtab for each of these included files. */
3785 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
3786 struct die_info *die,
3787 struct partial_symtab *pst)
3789 struct line_header *lh = NULL;
3790 struct attribute *attr;
3792 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
3794 lh = dwarf_decode_line_header (DW_UNSND (attr), cu);
3796 return; /* No linetable, so no includes. */
3798 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3799 dwarf_decode_lines (lh, pst->dirname, cu, pst, 1);
3801 free_line_header (lh);
3805 hash_signatured_type (const void *item)
3807 const struct signatured_type *sig_type = item;
3809 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3810 return sig_type->signature;
3814 eq_signatured_type (const void *item_lhs, const void *item_rhs)
3816 const struct signatured_type *lhs = item_lhs;
3817 const struct signatured_type *rhs = item_rhs;
3819 return lhs->signature == rhs->signature;
3822 /* Allocate a hash table for signatured types. */
3825 allocate_signatured_type_table (struct objfile *objfile)
3827 return htab_create_alloc_ex (41,
3828 hash_signatured_type,
3831 &objfile->objfile_obstack,
3832 hashtab_obstack_allocate,
3833 dummy_obstack_deallocate);
3836 /* A helper function to add a signatured type CU to a table. */
3839 add_signatured_type_cu_to_table (void **slot, void *datum)
3841 struct signatured_type *sigt = *slot;
3842 struct signatured_type ***datap = datum;
3850 /* Create the hash table of all entries in the .debug_types section.
3851 DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
3852 The result is a pointer to the hash table or NULL if there are
3856 create_debug_types_hash_table (struct dwo_file *dwo_file,
3857 VEC (dwarf2_section_info_def) *types)
3859 struct objfile *objfile = dwarf2_per_objfile->objfile;
3860 htab_t types_htab = NULL;
3862 struct dwarf2_section_info *section;
3863 struct dwarf2_section_info *abbrev_section;
3865 if (VEC_empty (dwarf2_section_info_def, types))
3868 abbrev_section = (dwo_file != NULL
3869 ? &dwo_file->sections.abbrev
3870 : &dwarf2_per_objfile->abbrev);
3872 if (dwarf2_read_debug)
3873 fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n",
3874 dwo_file ? ".dwo" : "",
3875 bfd_get_filename (abbrev_section->asection->owner));
3878 VEC_iterate (dwarf2_section_info_def, types, ix, section);
3882 gdb_byte *info_ptr, *end_ptr;
3884 dwarf2_read_section (objfile, section);
3885 info_ptr = section->buffer;
3887 if (info_ptr == NULL)
3890 /* We can't set abfd until now because the section may be empty or
3891 not present, in which case section->asection will be NULL. */
3892 abfd = section->asection->owner;
3894 if (types_htab == NULL)
3897 types_htab = allocate_dwo_unit_table (objfile);
3899 types_htab = allocate_signatured_type_table (objfile);
3902 /* We don't use init_cutu_and_read_dies_simple, or some such, here
3903 because we don't need to read any dies: the signature is in the
3906 end_ptr = info_ptr + section->size;
3907 while (info_ptr < end_ptr)
3910 cu_offset type_offset_in_tu;
3912 struct signatured_type *sig_type;
3913 struct dwo_unit *dwo_tu;
3915 gdb_byte *ptr = info_ptr;
3916 struct comp_unit_head header;
3917 unsigned int length;
3919 offset.sect_off = ptr - section->buffer;
3921 /* We need to read the type's signature in order to build the hash
3922 table, but we don't need anything else just yet. */
3924 ptr = read_and_check_type_unit_head (&header, section,
3925 abbrev_section, ptr,
3926 &signature, &type_offset_in_tu);
3928 length = get_cu_length (&header);
3930 /* Skip dummy type units. */
3931 if (ptr >= info_ptr + length
3932 || peek_abbrev_code (abfd, ptr) == 0)
3941 dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
3943 dwo_tu->dwo_file = dwo_file;
3944 dwo_tu->signature = signature;
3945 dwo_tu->type_offset_in_tu = type_offset_in_tu;
3946 dwo_tu->info_or_types_section = section;
3947 dwo_tu->offset = offset;
3948 dwo_tu->length = length;
3952 /* N.B.: type_offset is not usable if this type uses a DWO file.
3953 The real type_offset is in the DWO file. */
3955 sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack,
3956 struct signatured_type);
3957 sig_type->signature = signature;
3958 sig_type->type_offset_in_tu = type_offset_in_tu;
3959 sig_type->per_cu.objfile = objfile;
3960 sig_type->per_cu.is_debug_types = 1;
3961 sig_type->per_cu.info_or_types_section = section;
3962 sig_type->per_cu.offset = offset;
3963 sig_type->per_cu.length = length;
3966 slot = htab_find_slot (types_htab,
3967 dwo_file ? (void*) dwo_tu : (void *) sig_type,
3969 gdb_assert (slot != NULL);
3972 sect_offset dup_offset;
3976 const struct dwo_unit *dup_tu = *slot;
3978 dup_offset = dup_tu->offset;
3982 const struct signatured_type *dup_tu = *slot;
3984 dup_offset = dup_tu->per_cu.offset;
3987 complaint (&symfile_complaints,
3988 _("debug type entry at offset 0x%x is duplicate to the "
3989 "entry at offset 0x%x, signature 0x%s"),
3990 offset.sect_off, dup_offset.sect_off,
3991 phex (signature, sizeof (signature)));
3993 *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type;
3995 if (dwarf2_read_debug)
3996 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
3998 phex (signature, sizeof (signature)));
4007 /* Create the hash table of all entries in the .debug_types section,
4008 and initialize all_type_units.
4009 The result is zero if there is an error (e.g. missing .debug_types section),
4010 otherwise non-zero. */
4013 create_all_type_units (struct objfile *objfile)
4016 struct signatured_type **iter;
4018 types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types);
4019 if (types_htab == NULL)
4021 dwarf2_per_objfile->signatured_types = NULL;
4025 dwarf2_per_objfile->signatured_types = types_htab;
4027 dwarf2_per_objfile->n_type_units = htab_elements (types_htab);
4028 dwarf2_per_objfile->all_type_units
4029 = obstack_alloc (&objfile->objfile_obstack,
4030 dwarf2_per_objfile->n_type_units
4031 * sizeof (struct signatured_type *));
4032 iter = &dwarf2_per_objfile->all_type_units[0];
4033 htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter);
4034 gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0]
4035 == dwarf2_per_objfile->n_type_units);
4040 /* Lookup a signature based type for DW_FORM_ref_sig8.
4041 Returns NULL if signature SIG is not present in the table. */
4043 static struct signatured_type *
4044 lookup_signatured_type (ULONGEST sig)
4046 struct signatured_type find_entry, *entry;
4048 if (dwarf2_per_objfile->signatured_types == NULL)
4050 complaint (&symfile_complaints,
4051 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4055 find_entry.signature = sig;
4056 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
4060 /* Low level DIE reading support. */
4062 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4065 init_cu_die_reader (struct die_reader_specs *reader,
4066 struct dwarf2_cu *cu,
4067 struct dwarf2_section_info *section,
4068 struct dwo_file *dwo_file)
4070 gdb_assert (section->readin && section->buffer != NULL);
4071 reader->abfd = section->asection->owner;
4073 reader->dwo_file = dwo_file;
4074 reader->die_section = section;
4075 reader->buffer = section->buffer;
4076 reader->buffer_end = section->buffer + section->size;
4079 /* Initialize a CU (or TU) and read its DIEs.
4080 If the CU defers to a DWO file, read the DWO file as well.
4082 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4083 Otherwise the table specified in the comp unit header is read in and used.
4084 This is an optimization for when we already have the abbrev table.
4086 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4087 Otherwise, a new CU is allocated with xmalloc.
4089 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4090 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4092 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4093 linker) then DIE_READER_FUNC will not get called. */
4096 init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu,
4097 struct abbrev_table *abbrev_table,
4098 int use_existing_cu, int keep,
4099 die_reader_func_ftype *die_reader_func,
4102 struct objfile *objfile = dwarf2_per_objfile->objfile;
4103 struct dwarf2_section_info *section = this_cu->info_or_types_section;
4104 bfd *abfd = section->asection->owner;
4105 struct dwarf2_cu *cu;
4106 gdb_byte *begin_info_ptr, *info_ptr;
4107 struct die_reader_specs reader;
4108 struct die_info *comp_unit_die;
4110 struct attribute *attr;
4111 struct cleanup *cleanups, *free_cu_cleanup = NULL;
4112 struct signatured_type *sig_type = NULL;
4113 struct dwarf2_section_info *abbrev_section;
4114 /* Non-zero if CU currently points to a DWO file and we need to
4115 reread it. When this happens we need to reread the skeleton die
4116 before we can reread the DWO file. */
4117 int rereading_dwo_cu = 0;
4119 if (dwarf2_die_debug)
4120 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
4121 this_cu->is_debug_types ? "type" : "comp",
4122 this_cu->offset.sect_off);
4124 if (use_existing_cu)
4127 cleanups = make_cleanup (null_cleanup, NULL);
4129 /* This is cheap if the section is already read in. */
4130 dwarf2_read_section (objfile, section);
4132 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
4133 abbrev_section = &dwarf2_per_objfile->abbrev;
4135 if (use_existing_cu && this_cu->cu != NULL)
4139 /* If this CU is from a DWO file we need to start over, we need to
4140 refetch the attributes from the skeleton CU.
4141 This could be optimized by retrieving those attributes from when we
4142 were here the first time: the previous comp_unit_die was stored in
4143 comp_unit_obstack. But there's no data yet that we need this
4145 if (cu->dwo_unit != NULL)
4146 rereading_dwo_cu = 1;
4150 /* If !use_existing_cu, this_cu->cu must be NULL. */
4151 gdb_assert (this_cu->cu == NULL);
4153 cu = xmalloc (sizeof (*cu));
4154 init_one_comp_unit (cu, this_cu);
4156 /* If an error occurs while loading, release our storage. */
4157 free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
4160 if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu)
4162 /* We already have the header, there's no need to read it in again. */
4163 info_ptr += cu->header.first_die_offset.cu_off;
4167 if (this_cu->is_debug_types)
4170 cu_offset type_offset_in_tu;
4172 info_ptr = read_and_check_type_unit_head (&cu->header, section,
4173 abbrev_section, info_ptr,
4175 &type_offset_in_tu);
4177 /* Since per_cu is the first member of struct signatured_type,
4178 we can go from a pointer to one to a pointer to the other. */
4179 sig_type = (struct signatured_type *) this_cu;
4180 gdb_assert (sig_type->signature == signature);
4181 gdb_assert (sig_type->type_offset_in_tu.cu_off
4182 == type_offset_in_tu.cu_off);
4183 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
4185 /* LENGTH has not been set yet for type units if we're
4186 using .gdb_index. */
4187 this_cu->length = get_cu_length (&cu->header);
4189 /* Establish the type offset that can be used to lookup the type. */
4190 sig_type->type_offset_in_section.sect_off =
4191 this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off;
4195 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
4199 gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off);
4200 gdb_assert (this_cu->length == get_cu_length (&cu->header));
4204 /* Skip dummy compilation units. */
4205 if (info_ptr >= begin_info_ptr + this_cu->length
4206 || peek_abbrev_code (abfd, info_ptr) == 0)
4208 do_cleanups (cleanups);
4212 /* If we don't have them yet, read the abbrevs for this compilation unit.
4213 And if we need to read them now, make sure they're freed when we're
4214 done. Note that it's important that if the CU had an abbrev table
4215 on entry we don't free it when we're done: Somewhere up the call stack
4216 it may be in use. */
4217 if (abbrev_table != NULL)
4219 gdb_assert (cu->abbrev_table == NULL);
4220 gdb_assert (cu->header.abbrev_offset.sect_off
4221 == abbrev_table->offset.sect_off);
4222 cu->abbrev_table = abbrev_table;
4224 else if (cu->abbrev_table == NULL)
4226 dwarf2_read_abbrevs (cu, abbrev_section);
4227 make_cleanup (dwarf2_free_abbrev_table, cu);
4229 else if (rereading_dwo_cu)
4231 dwarf2_free_abbrev_table (cu);
4232 dwarf2_read_abbrevs (cu, abbrev_section);
4235 /* Read the top level CU/TU die. */
4236 init_cu_die_reader (&reader, cu, section, NULL);
4237 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
4239 /* If we have a DWO stub, process it and then read in the DWO file.
4240 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4241 a DWO CU, that this test will fail. */
4242 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
4245 char *dwo_name = DW_STRING (attr);
4246 const char *comp_dir_string;
4247 struct dwo_unit *dwo_unit;
4248 ULONGEST signature; /* Or dwo_id. */
4249 struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
4250 int i,num_extra_attrs;
4251 struct dwarf2_section_info *dwo_abbrev_section;
4254 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4255 " has children (offset 0x%x) [in module %s]"),
4256 this_cu->offset.sect_off, bfd_get_filename (abfd));
4258 /* These attributes aren't processed until later:
4259 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4260 However, the attribute is found in the stub which we won't have later.
4261 In order to not impose this complication on the rest of the code,
4262 we read them here and copy them to the DWO CU/TU die. */
4264 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4267 if (! this_cu->is_debug_types)
4268 stmt_list = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
4269 low_pc = dwarf2_attr (comp_unit_die, DW_AT_low_pc, cu);
4270 high_pc = dwarf2_attr (comp_unit_die, DW_AT_high_pc, cu);
4271 ranges = dwarf2_attr (comp_unit_die, DW_AT_ranges, cu);
4272 comp_dir = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
4274 /* There should be a DW_AT_addr_base attribute here (if needed).
4275 We need the value before we can process DW_FORM_GNU_addr_index. */
4277 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu);
4279 cu->addr_base = DW_UNSND (attr);
4281 /* There should be a DW_AT_ranges_base attribute here (if needed).
4282 We need the value before we can process DW_AT_ranges. */
4283 cu->ranges_base = 0;
4284 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu);
4286 cu->ranges_base = DW_UNSND (attr);
4288 if (this_cu->is_debug_types)
4290 gdb_assert (sig_type != NULL);
4291 signature = sig_type->signature;
4295 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
4297 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4299 signature = DW_UNSND (attr);
4302 /* We may need the comp_dir in order to find the DWO file. */
4303 comp_dir_string = NULL;
4305 comp_dir_string = DW_STRING (comp_dir);
4307 if (this_cu->is_debug_types)
4308 dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir_string);
4310 dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir_string,
4313 if (dwo_unit == NULL)
4315 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4316 " with ID %s [in module %s]"),
4317 this_cu->offset.sect_off,
4318 phex (signature, sizeof (signature)),
4322 /* Set up for reading the DWO CU/TU. */
4323 cu->dwo_unit = dwo_unit;
4324 section = dwo_unit->info_or_types_section;
4325 begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
4326 dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
4327 init_cu_die_reader (&reader, cu, section, dwo_unit->dwo_file);
4329 if (this_cu->is_debug_types)
4333 info_ptr = read_and_check_type_unit_head (&cu->header, section,
4337 gdb_assert (sig_type->signature == signature);
4338 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
4339 gdb_assert (dwo_unit->length == get_cu_length (&cu->header));
4341 /* Establish the type offset that can be used to lookup the type.
4342 For DWO files, we don't know it until now. */
4343 sig_type->type_offset_in_section.sect_off =
4344 dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
4348 info_ptr = read_and_check_comp_unit_head (&cu->header, section,
4351 gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
4352 gdb_assert (dwo_unit->length == get_cu_length (&cu->header));
4355 /* Discard the original CU's abbrev table, and read the DWO's. */
4356 if (abbrev_table == NULL)
4358 dwarf2_free_abbrev_table (cu);
4359 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
4363 dwarf2_read_abbrevs (cu, dwo_abbrev_section);
4364 make_cleanup (dwarf2_free_abbrev_table, cu);
4367 /* Read in the die, but leave space to copy over the attributes
4368 from the stub. This has the benefit of simplifying the rest of
4369 the code - all the real work is done here. */
4370 num_extra_attrs = ((stmt_list != NULL)
4374 + (comp_dir != NULL));
4375 info_ptr = read_full_die_1 (&reader, &comp_unit_die, info_ptr,
4376 &has_children, num_extra_attrs);
4378 /* Copy over the attributes from the stub to the DWO die. */
4379 i = comp_unit_die->num_attrs;
4380 if (stmt_list != NULL)
4381 comp_unit_die->attrs[i++] = *stmt_list;
4383 comp_unit_die->attrs[i++] = *low_pc;
4384 if (high_pc != NULL)
4385 comp_unit_die->attrs[i++] = *high_pc;
4387 comp_unit_die->attrs[i++] = *ranges;
4388 if (comp_dir != NULL)
4389 comp_unit_die->attrs[i++] = *comp_dir;
4390 comp_unit_die->num_attrs += num_extra_attrs;
4392 /* Skip dummy compilation units. */
4393 if (info_ptr >= begin_info_ptr + dwo_unit->length
4394 || peek_abbrev_code (abfd, info_ptr) == 0)
4396 do_cleanups (cleanups);
4401 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
4403 if (free_cu_cleanup != NULL)
4407 /* We've successfully allocated this compilation unit. Let our
4408 caller clean it up when finished with it. */
4409 discard_cleanups (free_cu_cleanup);
4411 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4412 So we have to manually free the abbrev table. */
4413 dwarf2_free_abbrev_table (cu);
4415 /* Link this CU into read_in_chain. */
4416 this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
4417 dwarf2_per_objfile->read_in_chain = this_cu;
4420 do_cleanups (free_cu_cleanup);
4423 do_cleanups (cleanups);
4426 /* Read CU/TU THIS_CU in section SECTION,
4427 but do not follow DW_AT_GNU_dwo_name if present.
4428 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
4429 have already done the lookup to find the DWO file).
4431 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4432 THIS_CU->is_debug_types, but nothing else.
4434 We fill in THIS_CU->length.
4436 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4437 linker) then DIE_READER_FUNC will not get called.
4439 THIS_CU->cu is always freed when done.
4440 This is done in order to not leave THIS_CU->cu in a state where we have
4441 to care whether it refers to the "main" CU or the DWO CU. */
4444 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu,
4445 struct dwarf2_section_info *abbrev_section,
4446 struct dwo_file *dwo_file,
4447 die_reader_func_ftype *die_reader_func,
4450 struct objfile *objfile = dwarf2_per_objfile->objfile;
4451 struct dwarf2_section_info *section = this_cu->info_or_types_section;
4452 bfd *abfd = section->asection->owner;
4453 struct dwarf2_cu cu;
4454 gdb_byte *begin_info_ptr, *info_ptr;
4455 struct die_reader_specs reader;
4456 struct cleanup *cleanups;
4457 struct die_info *comp_unit_die;
4460 if (dwarf2_die_debug)
4461 fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n",
4462 this_cu->is_debug_types ? "type" : "comp",
4463 this_cu->offset.sect_off);
4465 gdb_assert (this_cu->cu == NULL);
4467 /* This is cheap if the section is already read in. */
4468 dwarf2_read_section (objfile, section);
4470 init_one_comp_unit (&cu, this_cu);
4472 cleanups = make_cleanup (free_stack_comp_unit, &cu);
4474 begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off;
4475 info_ptr = read_and_check_comp_unit_head (&cu.header, section,
4476 abbrev_section, info_ptr,
4477 this_cu->is_debug_types);
4479 this_cu->length = get_cu_length (&cu.header);
4481 /* Skip dummy compilation units. */
4482 if (info_ptr >= begin_info_ptr + this_cu->length
4483 || peek_abbrev_code (abfd, info_ptr) == 0)
4485 do_cleanups (cleanups);
4489 dwarf2_read_abbrevs (&cu, abbrev_section);
4490 make_cleanup (dwarf2_free_abbrev_table, &cu);
4492 init_cu_die_reader (&reader, &cu, section, dwo_file);
4493 info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
4495 die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
4497 do_cleanups (cleanups);
4500 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4501 does not lookup the specified DWO file.
4502 This cannot be used to read DWO files.
4504 THIS_CU->cu is always freed when done.
4505 This is done in order to not leave THIS_CU->cu in a state where we have
4506 to care whether it refers to the "main" CU or the DWO CU.
4507 We can revisit this if the data shows there's a performance issue. */
4510 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu,
4511 die_reader_func_ftype *die_reader_func,
4514 init_cutu_and_read_dies_no_follow (this_cu,
4515 &dwarf2_per_objfile->abbrev,
4517 die_reader_func, data);
4520 /* Create a psymtab named NAME and assign it to PER_CU.
4522 The caller must fill in the following details:
4523 dirname, textlow, texthigh. */
4525 static struct partial_symtab *
4526 create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
4528 struct objfile *objfile = per_cu->objfile;
4529 struct partial_symtab *pst;
4531 pst = start_psymtab_common (objfile, objfile->section_offsets,
4533 objfile->global_psymbols.next,
4534 objfile->static_psymbols.next);
4536 pst->psymtabs_addrmap_supported = 1;
4538 /* This is the glue that links PST into GDB's symbol API. */
4539 pst->read_symtab_private = per_cu;
4540 pst->read_symtab = dwarf2_psymtab_to_symtab;
4541 per_cu->v.psymtab = pst;
4546 /* die_reader_func for process_psymtab_comp_unit. */
4549 process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
4551 struct die_info *comp_unit_die,
4555 struct dwarf2_cu *cu = reader->cu;
4556 struct objfile *objfile = cu->objfile;
4557 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
4558 struct attribute *attr;
4560 CORE_ADDR best_lowpc = 0, best_highpc = 0;
4561 struct partial_symtab *pst;
4563 const char *filename;
4564 int *want_partial_unit_ptr = data;
4566 if (comp_unit_die->tag == DW_TAG_partial_unit
4567 && (want_partial_unit_ptr == NULL
4568 || !*want_partial_unit_ptr))
4571 gdb_assert (! per_cu->is_debug_types);
4573 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
4575 cu->list_in_scope = &file_symbols;
4577 /* Allocate a new partial symbol table structure. */
4578 attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
4579 if (attr == NULL || !DW_STRING (attr))
4582 filename = DW_STRING (attr);
4584 pst = create_partial_symtab (per_cu, filename);
4586 /* This must be done before calling dwarf2_build_include_psymtabs. */
4587 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
4589 pst->dirname = DW_STRING (attr);
4591 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4593 dwarf2_find_base_address (comp_unit_die, cu);
4595 /* Possibly set the default values of LOWPC and HIGHPC from
4597 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
4598 &best_highpc, cu, pst);
4599 if (has_pc_info == 1 && best_lowpc < best_highpc)
4600 /* Store the contiguous range if it is not empty; it can be empty for
4601 CUs with no code. */
4602 addrmap_set_empty (objfile->psymtabs_addrmap,
4603 best_lowpc + baseaddr,
4604 best_highpc + baseaddr - 1, pst);
4606 /* Check if comp unit has_children.
4607 If so, read the rest of the partial symbols from this comp unit.
4608 If not, there's no more debug_info for this comp unit. */
4611 struct partial_die_info *first_die;
4612 CORE_ADDR lowpc, highpc;
4614 lowpc = ((CORE_ADDR) -1);
4615 highpc = ((CORE_ADDR) 0);
4617 first_die = load_partial_dies (reader, info_ptr, 1);
4619 scan_partial_symbols (first_die, &lowpc, &highpc,
4622 /* If we didn't find a lowpc, set it to highpc to avoid
4623 complaints from `maint check'. */
4624 if (lowpc == ((CORE_ADDR) -1))
4627 /* If the compilation unit didn't have an explicit address range,
4628 then use the information extracted from its child dies. */
4632 best_highpc = highpc;
4635 pst->textlow = best_lowpc + baseaddr;
4636 pst->texthigh = best_highpc + baseaddr;
4638 pst->n_global_syms = objfile->global_psymbols.next -
4639 (objfile->global_psymbols.list + pst->globals_offset);
4640 pst->n_static_syms = objfile->static_psymbols.next -
4641 (objfile->static_psymbols.list + pst->statics_offset);
4642 sort_pst_symbols (pst);
4644 if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs))
4647 int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs);
4648 struct dwarf2_per_cu_data *iter;
4650 /* Fill in 'dependencies' here; we fill in 'users' in a
4652 pst->number_of_dependencies = len;
4653 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
4654 len * sizeof (struct symtab *));
4656 VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs,
4659 pst->dependencies[i] = iter->v.psymtab;
4661 VEC_free (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs);
4664 /* Get the list of files included in the current compilation unit,
4665 and build a psymtab for each of them. */
4666 dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
4668 if (dwarf2_read_debug)
4670 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4672 fprintf_unfiltered (gdb_stdlog,
4673 "Psymtab for %s unit @0x%x: 0x%s - 0x%s"
4674 ", %d global, %d static syms\n",
4675 per_cu->is_debug_types ? "type" : "comp",
4676 per_cu->offset.sect_off,
4677 paddress (gdbarch, pst->textlow),
4678 paddress (gdbarch, pst->texthigh),
4679 pst->n_global_syms, pst->n_static_syms);
4683 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4684 Process compilation unit THIS_CU for a psymtab. */
4687 process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
4688 int want_partial_unit)
4690 /* If this compilation unit was already read in, free the
4691 cached copy in order to read it in again. This is
4692 necessary because we skipped some symbols when we first
4693 read in the compilation unit (see load_partial_dies).
4694 This problem could be avoided, but the benefit is unclear. */
4695 if (this_cu->cu != NULL)
4696 free_one_cached_comp_unit (this_cu);
4698 gdb_assert (! this_cu->is_debug_types);
4699 init_cutu_and_read_dies (this_cu, NULL, 0, 0,
4700 process_psymtab_comp_unit_reader,
4701 &want_partial_unit);
4703 /* Age out any secondary CUs. */
4704 age_cached_comp_units ();
4708 hash_type_unit_group (const void *item)
4710 const struct type_unit_group *symtab = item;
4712 return symtab->line_offset.sect_off;
4716 eq_type_unit_group (const void *item_lhs, const void *item_rhs)
4718 const struct type_unit_group *lhs = item_lhs;
4719 const struct type_unit_group *rhs = item_rhs;
4721 return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
4724 /* Allocate a hash table for type unit groups. */
4727 allocate_type_unit_groups_table (void)
4729 return htab_create_alloc_ex (3,
4730 hash_type_unit_group,
4733 &dwarf2_per_objfile->objfile->objfile_obstack,
4734 hashtab_obstack_allocate,
4735 dummy_obstack_deallocate);
4738 /* Type units that don't have DW_AT_stmt_list are grouped into their own
4739 partial symtabs. We combine several TUs per psymtab to not let the size
4740 of any one psymtab grow too big. */
4741 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
4742 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
4744 /* Helper routine for build_type_psymtabs_reader.
4745 Create the type_unit_group object used to hold one or more TUs. */
4747 static struct type_unit_group *
4748 create_type_unit_group (struct dwarf2_per_cu_data *per_cu,
4749 sect_offset line_offset_struct)
4751 struct objfile *objfile = dwarf2_per_objfile->objfile;
4752 struct type_unit_group *tu_group;
4753 struct partial_symtab *pst;
4754 unsigned int line_offset;
4757 line_offset = line_offset_struct.sect_off;
4759 /* Give the symtab a useful name for debug purposes. */
4760 if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
4761 name = xstrprintf ("<type_units_%d>",
4762 (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
4764 name = xstrprintf ("<type_units_at_0x%x>", line_offset);
4766 tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4767 struct type_unit_group);
4769 per_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
4770 struct dwarf2_per_cu_data);
4771 per_cu->objfile = objfile;
4772 per_cu->is_debug_types = 1;
4773 per_cu->s.type_unit_group = tu_group;
4775 pst = create_partial_symtab (per_cu, name);
4780 tu_group->per_cu = per_cu;
4781 tu_group->line_offset.sect_off = line_offset;
4786 /* Look up the type_unit_group for PER_CU, and create it if necessary.
4787 STMT_LIST is an DW_AT_stmt_list attribute. */
4789 static struct type_unit_group *
4790 get_type_unit_group (struct dwarf2_per_cu_data *per_cu,
4791 struct attribute *stmt_list)
4793 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
4794 struct type_unit_group *tu_group;
4796 unsigned int line_offset;
4797 struct type_unit_group type_unit_group_for_lookup;
4799 if (dwarf2_per_objfile->type_unit_groups == NULL)
4801 dwarf2_per_objfile->type_unit_groups =
4802 allocate_type_unit_groups_table ();
4805 /* Do we need to create a new group, or can we use an existing one? */
4809 line_offset = DW_UNSND (stmt_list);
4810 ++tu_stats->nr_symtab_sharers;
4814 /* Ugh, no stmt_list. Rare, but we have to handle it.
4815 We can do various things here like create one group per TU or
4816 spread them over multiple groups to split up the expansion work.
4817 To avoid worst case scenarios (too many groups or too large groups)
4818 we, umm, group them in bunches. */
4819 line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
4820 | (tu_stats->nr_stmt_less_type_units
4821 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE));
4822 ++tu_stats->nr_stmt_less_type_units;
4825 type_unit_group_for_lookup.line_offset.sect_off = line_offset;
4826 slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups,
4827 &type_unit_group_for_lookup, INSERT);
4831 gdb_assert (tu_group != NULL);
4835 sect_offset line_offset_struct;
4837 line_offset_struct.sect_off = line_offset;
4838 tu_group = create_type_unit_group (per_cu, line_offset_struct);
4840 ++tu_stats->nr_symtabs;
4846 /* Struct used to sort TUs by their abbreviation table offset. */
4848 struct tu_abbrev_offset
4850 struct signatured_type *sig_type;
4851 sect_offset abbrev_offset;
4854 /* Helper routine for build_type_unit_groups, passed to qsort. */
4857 sort_tu_by_abbrev_offset (const void *ap, const void *bp)
4859 const struct tu_abbrev_offset * const *a = ap;
4860 const struct tu_abbrev_offset * const *b = bp;
4861 unsigned int aoff = (*a)->abbrev_offset.sect_off;
4862 unsigned int boff = (*b)->abbrev_offset.sect_off;
4864 return (aoff > boff) - (aoff < boff);
4867 /* A helper function to add a type_unit_group to a table. */
4870 add_type_unit_group_to_table (void **slot, void *datum)
4872 struct type_unit_group *tu_group = *slot;
4873 struct type_unit_group ***datap = datum;
4881 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
4882 each one passing FUNC,DATA.
4884 The efficiency is because we sort TUs by the abbrev table they use and
4885 only read each abbrev table once. In one program there are 200K TUs
4886 sharing 8K abbrev tables.
4888 The main purpose of this function is to support building the
4889 dwarf2_per_objfile->type_unit_groups table.
4890 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
4891 can collapse the search space by grouping them by stmt_list.
4892 The savings can be significant, in the same program from above the 200K TUs
4893 share 8K stmt_list tables.
4895 FUNC is expected to call get_type_unit_group, which will create the
4896 struct type_unit_group if necessary and add it to
4897 dwarf2_per_objfile->type_unit_groups. */
4900 build_type_unit_groups (die_reader_func_ftype *func, void *data)
4902 struct objfile *objfile = dwarf2_per_objfile->objfile;
4903 struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
4904 struct cleanup *cleanups;
4905 struct abbrev_table *abbrev_table;
4906 sect_offset abbrev_offset;
4907 struct tu_abbrev_offset *sorted_by_abbrev;
4908 struct type_unit_group **iter;
4911 /* It's up to the caller to not call us multiple times. */
4912 gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL);
4914 if (dwarf2_per_objfile->n_type_units == 0)
4917 /* TUs typically share abbrev tables, and there can be way more TUs than
4918 abbrev tables. Sort by abbrev table to reduce the number of times we
4919 read each abbrev table in.
4920 Alternatives are to punt or to maintain a cache of abbrev tables.
4921 This is simpler and efficient enough for now.
4923 Later we group TUs by their DW_AT_stmt_list value (as this defines the
4924 symtab to use). Typically TUs with the same abbrev offset have the same
4925 stmt_list value too so in practice this should work well.
4927 The basic algorithm here is:
4929 sort TUs by abbrev table
4930 for each TU with same abbrev table:
4931 read abbrev table if first user
4932 read TU top level DIE
4933 [IWBN if DWO skeletons had DW_AT_stmt_list]
4936 if (dwarf2_read_debug)
4937 fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n");
4939 /* Sort in a separate table to maintain the order of all_type_units
4940 for .gdb_index: TU indices directly index all_type_units. */
4941 sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset,
4942 dwarf2_per_objfile->n_type_units);
4943 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
4945 struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i];
4947 sorted_by_abbrev[i].sig_type = sig_type;
4948 sorted_by_abbrev[i].abbrev_offset =
4949 read_abbrev_offset (sig_type->per_cu.info_or_types_section,
4950 sig_type->per_cu.offset);
4952 cleanups = make_cleanup (xfree, sorted_by_abbrev);
4953 qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units,
4954 sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset);
4956 memset (tu_stats, 0, sizeof (*tu_stats));
4957 abbrev_offset.sect_off = ~(unsigned) 0;
4958 abbrev_table = NULL;
4959 make_cleanup (abbrev_table_free_cleanup, &abbrev_table);
4961 for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i)
4963 const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i];
4965 /* Switch to the next abbrev table if necessary. */
4966 if (abbrev_table == NULL
4967 || tu->abbrev_offset.sect_off != abbrev_offset.sect_off)
4969 if (abbrev_table != NULL)
4971 abbrev_table_free (abbrev_table);
4972 /* Reset to NULL in case abbrev_table_read_table throws
4973 an error: abbrev_table_free_cleanup will get called. */
4974 abbrev_table = NULL;
4976 abbrev_offset = tu->abbrev_offset;
4978 abbrev_table_read_table (&dwarf2_per_objfile->abbrev,
4980 ++tu_stats->nr_uniq_abbrev_tables;
4983 init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0,
4987 /* Create a vector of pointers to primary type units to make it easy to
4988 iterate over them and CUs. See dw2_get_primary_cu. */
4989 dwarf2_per_objfile->n_type_unit_groups =
4990 htab_elements (dwarf2_per_objfile->type_unit_groups);
4991 dwarf2_per_objfile->all_type_unit_groups =
4992 obstack_alloc (&objfile->objfile_obstack,
4993 dwarf2_per_objfile->n_type_unit_groups
4994 * sizeof (struct type_unit_group *));
4995 iter = &dwarf2_per_objfile->all_type_unit_groups[0];
4996 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
4997 add_type_unit_group_to_table, &iter);
4998 gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0]
4999 == dwarf2_per_objfile->n_type_unit_groups);
5001 do_cleanups (cleanups);
5003 if (dwarf2_read_debug)
5005 fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n");
5006 fprintf_unfiltered (gdb_stdlog, " %d TUs\n",
5007 dwarf2_per_objfile->n_type_units);
5008 fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n",
5009 tu_stats->nr_uniq_abbrev_tables);
5010 fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n",
5011 tu_stats->nr_symtabs);
5012 fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n",
5013 tu_stats->nr_symtab_sharers);
5014 fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n",
5015 tu_stats->nr_stmt_less_type_units);
5019 /* Reader function for build_type_psymtabs. */
5022 build_type_psymtabs_reader (const struct die_reader_specs *reader,
5024 struct die_info *type_unit_die,
5028 struct objfile *objfile = dwarf2_per_objfile->objfile;
5029 struct dwarf2_cu *cu = reader->cu;
5030 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
5031 struct type_unit_group *tu_group;
5032 struct attribute *attr;
5033 struct partial_die_info *first_die;
5034 CORE_ADDR lowpc, highpc;
5035 struct partial_symtab *pst;
5037 gdb_assert (data == NULL);
5042 attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
5043 tu_group = get_type_unit_group (per_cu, attr);
5045 VEC_safe_push (dwarf2_per_cu_ptr, tu_group->tus, per_cu);
5047 prepare_one_comp_unit (cu, type_unit_die, language_minimal);
5048 cu->list_in_scope = &file_symbols;
5049 pst = create_partial_symtab (per_cu, "");
5052 first_die = load_partial_dies (reader, info_ptr, 1);
5054 lowpc = (CORE_ADDR) -1;
5055 highpc = (CORE_ADDR) 0;
5056 scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu);
5058 pst->n_global_syms = objfile->global_psymbols.next -
5059 (objfile->global_psymbols.list + pst->globals_offset);
5060 pst->n_static_syms = objfile->static_psymbols.next -
5061 (objfile->static_psymbols.list + pst->statics_offset);
5062 sort_pst_symbols (pst);
5065 /* Traversal function for build_type_psymtabs. */
5068 build_type_psymtab_dependencies (void **slot, void *info)
5070 struct objfile *objfile = dwarf2_per_objfile->objfile;
5071 struct type_unit_group *tu_group = (struct type_unit_group *) *slot;
5072 struct dwarf2_per_cu_data *per_cu = tu_group->per_cu;
5073 struct partial_symtab *pst = per_cu->v.psymtab;
5074 int len = VEC_length (dwarf2_per_cu_ptr, tu_group->tus);
5075 struct dwarf2_per_cu_data *iter;
5078 gdb_assert (len > 0);
5080 pst->number_of_dependencies = len;
5081 pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
5082 len * sizeof (struct psymtab *));
5084 VEC_iterate (dwarf2_per_cu_ptr, tu_group->tus, i, iter);
5087 pst->dependencies[i] = iter->v.psymtab;
5088 iter->s.type_unit_group = tu_group;
5091 VEC_free (dwarf2_per_cu_ptr, tu_group->tus);
5096 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5097 Build partial symbol tables for the .debug_types comp-units. */
5100 build_type_psymtabs (struct objfile *objfile)
5102 if (! create_all_type_units (objfile))
5105 build_type_unit_groups (build_type_psymtabs_reader, NULL);
5107 /* Now that all TUs have been processed we can fill in the dependencies. */
5108 htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups,
5109 build_type_psymtab_dependencies, NULL);
5112 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5115 psymtabs_addrmap_cleanup (void *o)
5117 struct objfile *objfile = o;
5119 objfile->psymtabs_addrmap = NULL;
5122 /* Compute the 'user' field for each psymtab in OBJFILE. */
5125 set_partial_user (struct objfile *objfile)
5129 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
5131 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
5132 struct partial_symtab *pst = per_cu->v.psymtab;
5135 for (j = 0; j < pst->number_of_dependencies; ++j)
5137 /* Set the 'user' field only if it is not already set. */
5138 if (pst->dependencies[j]->user == NULL)
5139 pst->dependencies[j]->user = pst;
5144 /* Build the partial symbol table by doing a quick pass through the
5145 .debug_info and .debug_abbrev sections. */
5148 dwarf2_build_psymtabs_hard (struct objfile *objfile)
5150 struct cleanup *back_to, *addrmap_cleanup;
5151 struct obstack temp_obstack;
5154 if (dwarf2_read_debug)
5156 fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n",
5160 dwarf2_per_objfile->reading_partial_symbols = 1;
5162 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
5164 /* Any cached compilation units will be linked by the per-objfile
5165 read_in_chain. Make sure to free them when we're done. */
5166 back_to = make_cleanup (free_cached_comp_units, NULL);
5168 build_type_psymtabs (objfile);
5170 create_all_comp_units (objfile);
5172 /* Create a temporary address map on a temporary obstack. We later
5173 copy this to the final obstack. */
5174 obstack_init (&temp_obstack);
5175 make_cleanup_obstack_free (&temp_obstack);
5176 objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack);
5177 addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile);
5179 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
5181 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
5183 process_psymtab_comp_unit (per_cu, 0);
5186 set_partial_user (objfile);
5188 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
5189 &objfile->objfile_obstack);
5190 discard_cleanups (addrmap_cleanup);
5192 do_cleanups (back_to);
5194 if (dwarf2_read_debug)
5195 fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n",
5199 /* die_reader_func for load_partial_comp_unit. */
5202 load_partial_comp_unit_reader (const struct die_reader_specs *reader,
5204 struct die_info *comp_unit_die,
5208 struct dwarf2_cu *cu = reader->cu;
5210 prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
5212 /* Check if comp unit has_children.
5213 If so, read the rest of the partial symbols from this comp unit.
5214 If not, there's no more debug_info for this comp unit. */
5216 load_partial_dies (reader, info_ptr, 0);
5219 /* Load the partial DIEs for a secondary CU into memory.
5220 This is also used when rereading a primary CU with load_all_dies. */
5223 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
5225 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
5226 load_partial_comp_unit_reader, NULL);
5229 /* Create a list of all compilation units in OBJFILE.
5230 This is only done for -readnow and building partial symtabs. */
5233 create_all_comp_units (struct objfile *objfile)
5237 struct dwarf2_per_cu_data **all_comp_units;
5240 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
5241 info_ptr = dwarf2_per_objfile->info.buffer;
5245 all_comp_units = xmalloc (n_allocated
5246 * sizeof (struct dwarf2_per_cu_data *));
5248 while (info_ptr < dwarf2_per_objfile->info.buffer
5249 + dwarf2_per_objfile->info.size)
5251 unsigned int length, initial_length_size;
5252 struct dwarf2_per_cu_data *this_cu;
5255 offset.sect_off = info_ptr - dwarf2_per_objfile->info.buffer;
5257 /* Read just enough information to find out where the next
5258 compilation unit is. */
5259 length = read_initial_length (objfile->obfd, info_ptr,
5260 &initial_length_size);
5262 /* Save the compilation unit for later lookup. */
5263 this_cu = obstack_alloc (&objfile->objfile_obstack,
5264 sizeof (struct dwarf2_per_cu_data));
5265 memset (this_cu, 0, sizeof (*this_cu));
5266 this_cu->offset = offset;
5267 this_cu->length = length + initial_length_size;
5268 this_cu->objfile = objfile;
5269 this_cu->info_or_types_section = &dwarf2_per_objfile->info;
5271 if (n_comp_units == n_allocated)
5274 all_comp_units = xrealloc (all_comp_units,
5276 * sizeof (struct dwarf2_per_cu_data *));
5278 all_comp_units[n_comp_units++] = this_cu;
5280 info_ptr = info_ptr + this_cu->length;
5283 dwarf2_per_objfile->all_comp_units
5284 = obstack_alloc (&objfile->objfile_obstack,
5285 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
5286 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
5287 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
5288 xfree (all_comp_units);
5289 dwarf2_per_objfile->n_comp_units = n_comp_units;
5292 /* Process all loaded DIEs for compilation unit CU, starting at
5293 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5294 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5295 DW_AT_ranges). If NEED_PC is set, then this function will set
5296 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5297 and record the covered ranges in the addrmap. */
5300 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
5301 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
5303 struct partial_die_info *pdi;
5305 /* Now, march along the PDI's, descending into ones which have
5306 interesting children but skipping the children of the other ones,
5307 until we reach the end of the compilation unit. */
5313 fixup_partial_die (pdi, cu);
5315 /* Anonymous namespaces or modules have no name but have interesting
5316 children, so we need to look at them. Ditto for anonymous
5319 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
5320 || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type
5321 || pdi->tag == DW_TAG_imported_unit)
5325 case DW_TAG_subprogram:
5326 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
5328 case DW_TAG_constant:
5329 case DW_TAG_variable:
5330 case DW_TAG_typedef:
5331 case DW_TAG_union_type:
5332 if (!pdi->is_declaration)
5334 add_partial_symbol (pdi, cu);
5337 case DW_TAG_class_type:
5338 case DW_TAG_interface_type:
5339 case DW_TAG_structure_type:
5340 if (!pdi->is_declaration)
5342 add_partial_symbol (pdi, cu);
5345 case DW_TAG_enumeration_type:
5346 if (!pdi->is_declaration)
5347 add_partial_enumeration (pdi, cu);
5349 case DW_TAG_base_type:
5350 case DW_TAG_subrange_type:
5351 /* File scope base type definitions are added to the partial
5353 add_partial_symbol (pdi, cu);
5355 case DW_TAG_namespace:
5356 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
5359 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
5361 case DW_TAG_imported_unit:
5363 struct dwarf2_per_cu_data *per_cu;
5365 /* For now we don't handle imported units in type units. */
5366 if (cu->per_cu->is_debug_types)
5368 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5369 " supported in type units [in module %s]"),
5373 per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset,
5376 /* Go read the partial unit, if needed. */
5377 if (per_cu->v.psymtab == NULL)
5378 process_psymtab_comp_unit (per_cu, 1);
5380 VEC_safe_push (dwarf2_per_cu_ptr,
5381 cu->per_cu->s.imported_symtabs, per_cu);
5389 /* If the die has a sibling, skip to the sibling. */
5391 pdi = pdi->die_sibling;
5395 /* Functions used to compute the fully scoped name of a partial DIE.
5397 Normally, this is simple. For C++, the parent DIE's fully scoped
5398 name is concatenated with "::" and the partial DIE's name. For
5399 Java, the same thing occurs except that "." is used instead of "::".
5400 Enumerators are an exception; they use the scope of their parent
5401 enumeration type, i.e. the name of the enumeration type is not
5402 prepended to the enumerator.
5404 There are two complexities. One is DW_AT_specification; in this
5405 case "parent" means the parent of the target of the specification,
5406 instead of the direct parent of the DIE. The other is compilers
5407 which do not emit DW_TAG_namespace; in this case we try to guess
5408 the fully qualified name of structure types from their members'
5409 linkage names. This must be done using the DIE's children rather
5410 than the children of any DW_AT_specification target. We only need
5411 to do this for structures at the top level, i.e. if the target of
5412 any DW_AT_specification (if any; otherwise the DIE itself) does not
5415 /* Compute the scope prefix associated with PDI's parent, in
5416 compilation unit CU. The result will be allocated on CU's
5417 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5418 field. NULL is returned if no prefix is necessary. */
5420 partial_die_parent_scope (struct partial_die_info *pdi,
5421 struct dwarf2_cu *cu)
5423 char *grandparent_scope;
5424 struct partial_die_info *parent, *real_pdi;
5426 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5427 then this means the parent of the specification DIE. */
5430 while (real_pdi->has_specification)
5431 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
5433 parent = real_pdi->die_parent;
5437 if (parent->scope_set)
5438 return parent->scope;
5440 fixup_partial_die (parent, cu);
5442 grandparent_scope = partial_die_parent_scope (parent, cu);
5444 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5445 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5446 Work around this problem here. */
5447 if (cu->language == language_cplus
5448 && parent->tag == DW_TAG_namespace
5449 && strcmp (parent->name, "::") == 0
5450 && grandparent_scope == NULL)
5452 parent->scope = NULL;
5453 parent->scope_set = 1;
5457 if (pdi->tag == DW_TAG_enumerator)
5458 /* Enumerators should not get the name of the enumeration as a prefix. */
5459 parent->scope = grandparent_scope;
5460 else if (parent->tag == DW_TAG_namespace
5461 || parent->tag == DW_TAG_module
5462 || parent->tag == DW_TAG_structure_type
5463 || parent->tag == DW_TAG_class_type
5464 || parent->tag == DW_TAG_interface_type
5465 || parent->tag == DW_TAG_union_type
5466 || parent->tag == DW_TAG_enumeration_type)
5468 if (grandparent_scope == NULL)
5469 parent->scope = parent->name;
5471 parent->scope = typename_concat (&cu->comp_unit_obstack,
5473 parent->name, 0, cu);
5477 /* FIXME drow/2004-04-01: What should we be doing with
5478 function-local names? For partial symbols, we should probably be
5480 complaint (&symfile_complaints,
5481 _("unhandled containing DIE tag %d for DIE at %d"),
5482 parent->tag, pdi->offset.sect_off);
5483 parent->scope = grandparent_scope;
5486 parent->scope_set = 1;
5487 return parent->scope;
5490 /* Return the fully scoped name associated with PDI, from compilation unit
5491 CU. The result will be allocated with malloc. */
5494 partial_die_full_name (struct partial_die_info *pdi,
5495 struct dwarf2_cu *cu)
5499 /* If this is a template instantiation, we can not work out the
5500 template arguments from partial DIEs. So, unfortunately, we have
5501 to go through the full DIEs. At least any work we do building
5502 types here will be reused if full symbols are loaded later. */
5503 if (pdi->has_template_arguments)
5505 fixup_partial_die (pdi, cu);
5507 if (pdi->name != NULL && strchr (pdi->name, '<') == NULL)
5509 struct die_info *die;
5510 struct attribute attr;
5511 struct dwarf2_cu *ref_cu = cu;
5513 /* DW_FORM_ref_addr is using section offset. */
5515 attr.form = DW_FORM_ref_addr;
5516 attr.u.unsnd = pdi->offset.sect_off;
5517 die = follow_die_ref (NULL, &attr, &ref_cu);
5519 return xstrdup (dwarf2_full_name (NULL, die, ref_cu));
5523 parent_scope = partial_die_parent_scope (pdi, cu);
5524 if (parent_scope == NULL)
5527 return typename_concat (NULL, parent_scope, pdi->name, 0, cu);
5531 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
5533 struct objfile *objfile = cu->objfile;
5535 char *actual_name = NULL;
5537 int built_actual_name = 0;
5539 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
5541 actual_name = partial_die_full_name (pdi, cu);
5543 built_actual_name = 1;
5545 if (actual_name == NULL)
5546 actual_name = pdi->name;
5550 case DW_TAG_subprogram:
5551 if (pdi->is_external || cu->language == language_ada)
5553 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5554 of the global scope. But in Ada, we want to be able to access
5555 nested procedures globally. So all Ada subprograms are stored
5556 in the global scope. */
5557 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5558 mst_text, objfile); */
5559 add_psymbol_to_list (actual_name, strlen (actual_name),
5561 VAR_DOMAIN, LOC_BLOCK,
5562 &objfile->global_psymbols,
5563 0, pdi->lowpc + baseaddr,
5564 cu->language, objfile);
5568 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5569 mst_file_text, objfile); */
5570 add_psymbol_to_list (actual_name, strlen (actual_name),
5572 VAR_DOMAIN, LOC_BLOCK,
5573 &objfile->static_psymbols,
5574 0, pdi->lowpc + baseaddr,
5575 cu->language, objfile);
5578 case DW_TAG_constant:
5580 struct psymbol_allocation_list *list;
5582 if (pdi->is_external)
5583 list = &objfile->global_psymbols;
5585 list = &objfile->static_psymbols;
5586 add_psymbol_to_list (actual_name, strlen (actual_name),
5587 built_actual_name, VAR_DOMAIN, LOC_STATIC,
5588 list, 0, 0, cu->language, objfile);
5591 case DW_TAG_variable:
5593 addr = decode_locdesc (pdi->d.locdesc, cu);
5597 && !dwarf2_per_objfile->has_section_at_zero)
5599 /* A global or static variable may also have been stripped
5600 out by the linker if unused, in which case its address
5601 will be nullified; do not add such variables into partial
5602 symbol table then. */
5604 else if (pdi->is_external)
5607 Don't enter into the minimal symbol tables as there is
5608 a minimal symbol table entry from the ELF symbols already.
5609 Enter into partial symbol table if it has a location
5610 descriptor or a type.
5611 If the location descriptor is missing, new_symbol will create
5612 a LOC_UNRESOLVED symbol, the address of the variable will then
5613 be determined from the minimal symbol table whenever the variable
5615 The address for the partial symbol table entry is not
5616 used by GDB, but it comes in handy for debugging partial symbol
5619 if (pdi->d.locdesc || pdi->has_type)
5620 add_psymbol_to_list (actual_name, strlen (actual_name),
5622 VAR_DOMAIN, LOC_STATIC,
5623 &objfile->global_psymbols,
5625 cu->language, objfile);
5629 /* Static Variable. Skip symbols without location descriptors. */
5630 if (pdi->d.locdesc == NULL)
5632 if (built_actual_name)
5633 xfree (actual_name);
5636 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5637 mst_file_data, objfile); */
5638 add_psymbol_to_list (actual_name, strlen (actual_name),
5640 VAR_DOMAIN, LOC_STATIC,
5641 &objfile->static_psymbols,
5643 cu->language, objfile);
5646 case DW_TAG_typedef:
5647 case DW_TAG_base_type:
5648 case DW_TAG_subrange_type:
5649 add_psymbol_to_list (actual_name, strlen (actual_name),
5651 VAR_DOMAIN, LOC_TYPEDEF,
5652 &objfile->static_psymbols,
5653 0, (CORE_ADDR) 0, cu->language, objfile);
5655 case DW_TAG_namespace:
5656 add_psymbol_to_list (actual_name, strlen (actual_name),
5658 VAR_DOMAIN, LOC_TYPEDEF,
5659 &objfile->global_psymbols,
5660 0, (CORE_ADDR) 0, cu->language, objfile);
5662 case DW_TAG_class_type:
5663 case DW_TAG_interface_type:
5664 case DW_TAG_structure_type:
5665 case DW_TAG_union_type:
5666 case DW_TAG_enumeration_type:
5667 /* Skip external references. The DWARF standard says in the section
5668 about "Structure, Union, and Class Type Entries": "An incomplete
5669 structure, union or class type is represented by a structure,
5670 union or class entry that does not have a byte size attribute
5671 and that has a DW_AT_declaration attribute." */
5672 if (!pdi->has_byte_size && pdi->is_declaration)
5674 if (built_actual_name)
5675 xfree (actual_name);
5679 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
5680 static vs. global. */
5681 add_psymbol_to_list (actual_name, strlen (actual_name),
5683 STRUCT_DOMAIN, LOC_TYPEDEF,
5684 (cu->language == language_cplus
5685 || cu->language == language_java)
5686 ? &objfile->global_psymbols
5687 : &objfile->static_psymbols,
5688 0, (CORE_ADDR) 0, cu->language, objfile);
5691 case DW_TAG_enumerator:
5692 add_psymbol_to_list (actual_name, strlen (actual_name),
5694 VAR_DOMAIN, LOC_CONST,
5695 (cu->language == language_cplus
5696 || cu->language == language_java)
5697 ? &objfile->global_psymbols
5698 : &objfile->static_psymbols,
5699 0, (CORE_ADDR) 0, cu->language, objfile);
5705 if (built_actual_name)
5706 xfree (actual_name);
5709 /* Read a partial die corresponding to a namespace; also, add a symbol
5710 corresponding to that namespace to the symbol table. NAMESPACE is
5711 the name of the enclosing namespace. */
5714 add_partial_namespace (struct partial_die_info *pdi,
5715 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5716 int need_pc, struct dwarf2_cu *cu)
5718 /* Add a symbol for the namespace. */
5720 add_partial_symbol (pdi, cu);
5722 /* Now scan partial symbols in that namespace. */
5724 if (pdi->has_children)
5725 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
5728 /* Read a partial die corresponding to a Fortran module. */
5731 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
5732 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
5734 /* Now scan partial symbols in that module. */
5736 if (pdi->has_children)
5737 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
5740 /* Read a partial die corresponding to a subprogram and create a partial
5741 symbol for that subprogram. When the CU language allows it, this
5742 routine also defines a partial symbol for each nested subprogram
5743 that this subprogram contains.
5745 DIE my also be a lexical block, in which case we simply search
5746 recursively for suprograms defined inside that lexical block.
5747 Again, this is only performed when the CU language allows this
5748 type of definitions. */
5751 add_partial_subprogram (struct partial_die_info *pdi,
5752 CORE_ADDR *lowpc, CORE_ADDR *highpc,
5753 int need_pc, struct dwarf2_cu *cu)
5755 if (pdi->tag == DW_TAG_subprogram)
5757 if (pdi->has_pc_info)
5759 if (pdi->lowpc < *lowpc)
5760 *lowpc = pdi->lowpc;
5761 if (pdi->highpc > *highpc)
5762 *highpc = pdi->highpc;
5766 struct objfile *objfile = cu->objfile;
5768 baseaddr = ANOFFSET (objfile->section_offsets,
5769 SECT_OFF_TEXT (objfile));
5770 addrmap_set_empty (objfile->psymtabs_addrmap,
5771 pdi->lowpc + baseaddr,
5772 pdi->highpc - 1 + baseaddr,
5773 cu->per_cu->v.psymtab);
5777 if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined))
5779 if (!pdi->is_declaration)
5780 /* Ignore subprogram DIEs that do not have a name, they are
5781 illegal. Do not emit a complaint at this point, we will
5782 do so when we convert this psymtab into a symtab. */
5784 add_partial_symbol (pdi, cu);
5788 if (! pdi->has_children)
5791 if (cu->language == language_ada)
5793 pdi = pdi->die_child;
5796 fixup_partial_die (pdi, cu);
5797 if (pdi->tag == DW_TAG_subprogram
5798 || pdi->tag == DW_TAG_lexical_block)
5799 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
5800 pdi = pdi->die_sibling;
5805 /* Read a partial die corresponding to an enumeration type. */
5808 add_partial_enumeration (struct partial_die_info *enum_pdi,
5809 struct dwarf2_cu *cu)
5811 struct partial_die_info *pdi;
5813 if (enum_pdi->name != NULL)
5814 add_partial_symbol (enum_pdi, cu);
5816 pdi = enum_pdi->die_child;
5819 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
5820 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
5822 add_partial_symbol (pdi, cu);
5823 pdi = pdi->die_sibling;
5827 /* Return the initial uleb128 in the die at INFO_PTR. */
5830 peek_abbrev_code (bfd *abfd, gdb_byte *info_ptr)
5832 unsigned int bytes_read;
5834 return read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5837 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
5838 Return the corresponding abbrev, or NULL if the number is zero (indicating
5839 an empty DIE). In either case *BYTES_READ will be set to the length of
5840 the initial number. */
5842 static struct abbrev_info *
5843 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
5844 struct dwarf2_cu *cu)
5846 bfd *abfd = cu->objfile->obfd;
5847 unsigned int abbrev_number;
5848 struct abbrev_info *abbrev;
5850 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
5852 if (abbrev_number == 0)
5855 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
5858 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
5859 abbrev_number, bfd_get_filename (abfd));
5865 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5866 Returns a pointer to the end of a series of DIEs, terminated by an empty
5867 DIE. Any children of the skipped DIEs will also be skipped. */
5870 skip_children (const struct die_reader_specs *reader, gdb_byte *info_ptr)
5872 struct dwarf2_cu *cu = reader->cu;
5873 struct abbrev_info *abbrev;
5874 unsigned int bytes_read;
5878 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
5880 return info_ptr + bytes_read;
5882 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
5886 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5887 INFO_PTR should point just after the initial uleb128 of a DIE, and the
5888 abbrev corresponding to that skipped uleb128 should be passed in
5889 ABBREV. Returns a pointer to this DIE's sibling, skipping any
5893 skip_one_die (const struct die_reader_specs *reader, gdb_byte *info_ptr,
5894 struct abbrev_info *abbrev)
5896 unsigned int bytes_read;
5897 struct attribute attr;
5898 bfd *abfd = reader->abfd;
5899 struct dwarf2_cu *cu = reader->cu;
5900 gdb_byte *buffer = reader->buffer;
5901 const gdb_byte *buffer_end = reader->buffer_end;
5902 gdb_byte *start_info_ptr = info_ptr;
5903 unsigned int form, i;
5905 for (i = 0; i < abbrev->num_attrs; i++)
5907 /* The only abbrev we care about is DW_AT_sibling. */
5908 if (abbrev->attrs[i].name == DW_AT_sibling)
5910 read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
5911 if (attr.form == DW_FORM_ref_addr)
5912 complaint (&symfile_complaints,
5913 _("ignoring absolute DW_AT_sibling"));
5915 return buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
5918 /* If it isn't DW_AT_sibling, skip this attribute. */
5919 form = abbrev->attrs[i].form;
5923 case DW_FORM_ref_addr:
5924 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
5925 and later it is offset sized. */
5926 if (cu->header.version == 2)
5927 info_ptr += cu->header.addr_size;
5929 info_ptr += cu->header.offset_size;
5932 info_ptr += cu->header.addr_size;
5939 case DW_FORM_flag_present:
5951 case DW_FORM_ref_sig8:
5954 case DW_FORM_string:
5955 read_direct_string (abfd, info_ptr, &bytes_read);
5956 info_ptr += bytes_read;
5958 case DW_FORM_sec_offset:
5960 info_ptr += cu->header.offset_size;
5962 case DW_FORM_exprloc:
5964 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5965 info_ptr += bytes_read;
5967 case DW_FORM_block1:
5968 info_ptr += 1 + read_1_byte (abfd, info_ptr);
5970 case DW_FORM_block2:
5971 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
5973 case DW_FORM_block4:
5974 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
5978 case DW_FORM_ref_udata:
5979 case DW_FORM_GNU_addr_index:
5980 case DW_FORM_GNU_str_index:
5981 info_ptr = (gdb_byte *) safe_skip_leb128 (info_ptr, buffer_end);
5983 case DW_FORM_indirect:
5984 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5985 info_ptr += bytes_read;
5986 /* We need to continue parsing from here, so just go back to
5988 goto skip_attribute;
5991 error (_("Dwarf Error: Cannot handle %s "
5992 "in DWARF reader [in module %s]"),
5993 dwarf_form_name (form),
5994 bfd_get_filename (abfd));
5998 if (abbrev->has_children)
5999 return skip_children (reader, info_ptr);
6004 /* Locate ORIG_PDI's sibling.
6005 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6008 locate_pdi_sibling (const struct die_reader_specs *reader,
6009 struct partial_die_info *orig_pdi,
6012 /* Do we know the sibling already? */
6014 if (orig_pdi->sibling)
6015 return orig_pdi->sibling;
6017 /* Are there any children to deal with? */
6019 if (!orig_pdi->has_children)
6022 /* Skip the children the long way. */
6024 return skip_children (reader, info_ptr);
6027 /* Expand this partial symbol table into a full symbol table. */
6030 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
6036 warning (_("bug: psymtab for %s is already read in."),
6043 printf_filtered (_("Reading in symbols for %s..."),
6045 gdb_flush (gdb_stdout);
6048 /* Restore our global data. */
6049 dwarf2_per_objfile = objfile_data (pst->objfile,
6050 dwarf2_objfile_data_key);
6052 /* If this psymtab is constructed from a debug-only objfile, the
6053 has_section_at_zero flag will not necessarily be correct. We
6054 can get the correct value for this flag by looking at the data
6055 associated with the (presumably stripped) associated objfile. */
6056 if (pst->objfile->separate_debug_objfile_backlink)
6058 struct dwarf2_per_objfile *dpo_backlink
6059 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
6060 dwarf2_objfile_data_key);
6062 dwarf2_per_objfile->has_section_at_zero
6063 = dpo_backlink->has_section_at_zero;
6066 dwarf2_per_objfile->reading_partial_symbols = 0;
6068 psymtab_to_symtab_1 (pst);
6070 /* Finish up the debug error message. */
6072 printf_filtered (_("done.\n"));
6076 process_cu_includes ();
6079 /* Reading in full CUs. */
6081 /* Add PER_CU to the queue. */
6084 queue_comp_unit (struct dwarf2_per_cu_data *per_cu,
6085 enum language pretend_language)
6087 struct dwarf2_queue_item *item;
6090 item = xmalloc (sizeof (*item));
6091 item->per_cu = per_cu;
6092 item->pretend_language = pretend_language;
6095 if (dwarf2_queue == NULL)
6096 dwarf2_queue = item;
6098 dwarf2_queue_tail->next = item;
6100 dwarf2_queue_tail = item;
6103 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6104 unit and add it to our queue.
6105 The result is non-zero if PER_CU was queued, otherwise the result is zero
6106 meaning either PER_CU is already queued or it is already loaded. */
6109 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
6110 struct dwarf2_per_cu_data *per_cu,
6111 enum language pretend_language)
6113 /* We may arrive here during partial symbol reading, if we need full
6114 DIEs to process an unusual case (e.g. template arguments). Do
6115 not queue PER_CU, just tell our caller to load its DIEs. */
6116 if (dwarf2_per_objfile->reading_partial_symbols)
6118 if (per_cu->cu == NULL || per_cu->cu->dies == NULL)
6123 /* Mark the dependence relation so that we don't flush PER_CU
6125 dwarf2_add_dependence (this_cu, per_cu);
6127 /* If it's already on the queue, we have nothing to do. */
6131 /* If the compilation unit is already loaded, just mark it as
6133 if (per_cu->cu != NULL)
6135 per_cu->cu->last_used = 0;
6139 /* Add it to the queue. */
6140 queue_comp_unit (per_cu, pretend_language);
6145 /* Process the queue. */
6148 process_queue (void)
6150 struct dwarf2_queue_item *item, *next_item;
6152 if (dwarf2_read_debug)
6154 fprintf_unfiltered (gdb_stdlog,
6155 "Expanding one or more symtabs of objfile %s ...\n",
6156 dwarf2_per_objfile->objfile->name);
6159 /* The queue starts out with one item, but following a DIE reference
6160 may load a new CU, adding it to the end of the queue. */
6161 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
6163 if (dwarf2_per_objfile->using_index
6164 ? !item->per_cu->v.quick->symtab
6165 : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin))
6167 struct dwarf2_per_cu_data *per_cu = item->per_cu;
6169 if (dwarf2_read_debug)
6171 fprintf_unfiltered (gdb_stdlog,
6172 "Expanding symtab of %s at offset 0x%x\n",
6173 per_cu->is_debug_types ? "TU" : "CU",
6174 per_cu->offset.sect_off);
6177 if (per_cu->is_debug_types)
6178 process_full_type_unit (per_cu, item->pretend_language);
6180 process_full_comp_unit (per_cu, item->pretend_language);
6182 if (dwarf2_read_debug)
6184 fprintf_unfiltered (gdb_stdlog,
6185 "Done expanding %s at offset 0x%x\n",
6186 per_cu->is_debug_types ? "TU" : "CU",
6187 per_cu->offset.sect_off);
6191 item->per_cu->queued = 0;
6192 next_item = item->next;
6196 dwarf2_queue_tail = NULL;
6198 if (dwarf2_read_debug)
6200 fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n",
6201 dwarf2_per_objfile->objfile->name);
6205 /* Free all allocated queue entries. This function only releases anything if
6206 an error was thrown; if the queue was processed then it would have been
6207 freed as we went along. */
6210 dwarf2_release_queue (void *dummy)
6212 struct dwarf2_queue_item *item, *last;
6214 item = dwarf2_queue;
6217 /* Anything still marked queued is likely to be in an
6218 inconsistent state, so discard it. */
6219 if (item->per_cu->queued)
6221 if (item->per_cu->cu != NULL)
6222 free_one_cached_comp_unit (item->per_cu);
6223 item->per_cu->queued = 0;
6231 dwarf2_queue = dwarf2_queue_tail = NULL;
6234 /* Read in full symbols for PST, and anything it depends on. */
6237 psymtab_to_symtab_1 (struct partial_symtab *pst)
6239 struct dwarf2_per_cu_data *per_cu;
6245 for (i = 0; i < pst->number_of_dependencies; i++)
6246 if (!pst->dependencies[i]->readin
6247 && pst->dependencies[i]->user == NULL)
6249 /* Inform about additional files that need to be read in. */
6252 /* FIXME: i18n: Need to make this a single string. */
6253 fputs_filtered (" ", gdb_stdout);
6255 fputs_filtered ("and ", gdb_stdout);
6257 printf_filtered ("%s...", pst->dependencies[i]->filename);
6258 wrap_here (""); /* Flush output. */
6259 gdb_flush (gdb_stdout);
6261 psymtab_to_symtab_1 (pst->dependencies[i]);
6264 per_cu = pst->read_symtab_private;
6268 /* It's an include file, no symbols to read for it.
6269 Everything is in the parent symtab. */
6274 dw2_do_instantiate_symtab (per_cu);
6277 /* Trivial hash function for die_info: the hash value of a DIE
6278 is its offset in .debug_info for this objfile. */
6281 die_hash (const void *item)
6283 const struct die_info *die = item;
6285 return die->offset.sect_off;
6288 /* Trivial comparison function for die_info structures: two DIEs
6289 are equal if they have the same offset. */
6292 die_eq (const void *item_lhs, const void *item_rhs)
6294 const struct die_info *die_lhs = item_lhs;
6295 const struct die_info *die_rhs = item_rhs;
6297 return die_lhs->offset.sect_off == die_rhs->offset.sect_off;
6300 /* die_reader_func for load_full_comp_unit.
6301 This is identical to read_signatured_type_reader,
6302 but is kept separate for now. */
6305 load_full_comp_unit_reader (const struct die_reader_specs *reader,
6307 struct die_info *comp_unit_die,
6311 struct dwarf2_cu *cu = reader->cu;
6312 enum language *language_ptr = data;
6314 gdb_assert (cu->die_hash == NULL);
6316 htab_create_alloc_ex (cu->header.length / 12,
6320 &cu->comp_unit_obstack,
6321 hashtab_obstack_allocate,
6322 dummy_obstack_deallocate);
6325 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
6326 &info_ptr, comp_unit_die);
6327 cu->dies = comp_unit_die;
6328 /* comp_unit_die is not stored in die_hash, no need. */
6330 /* We try not to read any attributes in this function, because not
6331 all CUs needed for references have been loaded yet, and symbol
6332 table processing isn't initialized. But we have to set the CU language,
6333 or we won't be able to build types correctly.
6334 Similarly, if we do not read the producer, we can not apply
6335 producer-specific interpretation. */
6336 prepare_one_comp_unit (cu, cu->dies, *language_ptr);
6339 /* Load the DIEs associated with PER_CU into memory. */
6342 load_full_comp_unit (struct dwarf2_per_cu_data *this_cu,
6343 enum language pretend_language)
6345 gdb_assert (! this_cu->is_debug_types);
6347 init_cutu_and_read_dies (this_cu, NULL, 1, 1,
6348 load_full_comp_unit_reader, &pretend_language);
6351 /* Add a DIE to the delayed physname list. */
6354 add_to_method_list (struct type *type, int fnfield_index, int index,
6355 const char *name, struct die_info *die,
6356 struct dwarf2_cu *cu)
6358 struct delayed_method_info mi;
6360 mi.fnfield_index = fnfield_index;
6364 VEC_safe_push (delayed_method_info, cu->method_list, &mi);
6367 /* A cleanup for freeing the delayed method list. */
6370 free_delayed_list (void *ptr)
6372 struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr;
6373 if (cu->method_list != NULL)
6375 VEC_free (delayed_method_info, cu->method_list);
6376 cu->method_list = NULL;
6380 /* Compute the physnames of any methods on the CU's method list.
6382 The computation of method physnames is delayed in order to avoid the
6383 (bad) condition that one of the method's formal parameters is of an as yet
6387 compute_delayed_physnames (struct dwarf2_cu *cu)
6390 struct delayed_method_info *mi;
6391 for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i)
6393 const char *physname;
6394 struct fn_fieldlist *fn_flp
6395 = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index);
6396 physname = dwarf2_physname ((char *) mi->name, mi->die, cu);
6397 fn_flp->fn_fields[mi->index].physname = physname ? physname : "";
6401 /* Go objects should be embedded in a DW_TAG_module DIE,
6402 and it's not clear if/how imported objects will appear.
6403 To keep Go support simple until that's worked out,
6404 go back through what we've read and create something usable.
6405 We could do this while processing each DIE, and feels kinda cleaner,
6406 but that way is more invasive.
6407 This is to, for example, allow the user to type "p var" or "b main"
6408 without having to specify the package name, and allow lookups
6409 of module.object to work in contexts that use the expression
6413 fixup_go_packaging (struct dwarf2_cu *cu)
6415 char *package_name = NULL;
6416 struct pending *list;
6419 for (list = global_symbols; list != NULL; list = list->next)
6421 for (i = 0; i < list->nsyms; ++i)
6423 struct symbol *sym = list->symbol[i];
6425 if (SYMBOL_LANGUAGE (sym) == language_go
6426 && SYMBOL_CLASS (sym) == LOC_BLOCK)
6428 char *this_package_name = go_symbol_package_name (sym);
6430 if (this_package_name == NULL)
6432 if (package_name == NULL)
6433 package_name = this_package_name;
6436 if (strcmp (package_name, this_package_name) != 0)
6437 complaint (&symfile_complaints,
6438 _("Symtab %s has objects from two different Go packages: %s and %s"),
6439 (sym->symtab && sym->symtab->filename
6440 ? sym->symtab->filename
6441 : cu->objfile->name),
6442 this_package_name, package_name);
6443 xfree (this_package_name);
6449 if (package_name != NULL)
6451 struct objfile *objfile = cu->objfile;
6452 struct type *type = init_type (TYPE_CODE_MODULE, 0, 0,
6453 package_name, objfile);
6456 TYPE_TAG_NAME (type) = TYPE_NAME (type);
6458 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
6459 SYMBOL_SET_LANGUAGE (sym, language_go);
6460 SYMBOL_SET_NAMES (sym, package_name, strlen (package_name), 1, objfile);
6461 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6462 e.g., "main" finds the "main" module and not C's main(). */
6463 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
6464 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
6465 SYMBOL_TYPE (sym) = type;
6467 add_symbol_to_list (sym, &global_symbols);
6469 xfree (package_name);
6473 static void compute_symtab_includes (struct dwarf2_per_cu_data *per_cu);
6475 /* Return the symtab for PER_CU. This works properly regardless of
6476 whether we're using the index or psymtabs. */
6478 static struct symtab *
6479 get_symtab (struct dwarf2_per_cu_data *per_cu)
6481 return (dwarf2_per_objfile->using_index
6482 ? per_cu->v.quick->symtab
6483 : per_cu->v.psymtab->symtab);
6486 /* A helper function for computing the list of all symbol tables
6487 included by PER_CU. */
6490 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result,
6491 htab_t all_children,
6492 struct dwarf2_per_cu_data *per_cu)
6496 struct dwarf2_per_cu_data *iter;
6498 slot = htab_find_slot (all_children, per_cu, INSERT);
6501 /* This inclusion and its children have been processed. */
6506 /* Only add a CU if it has a symbol table. */
6507 if (get_symtab (per_cu) != NULL)
6508 VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu);
6511 VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs, ix, iter);
6513 recursively_compute_inclusions (result, all_children, iter);
6516 /* Compute the symtab 'includes' fields for the symtab related to
6520 compute_symtab_includes (struct dwarf2_per_cu_data *per_cu)
6522 gdb_assert (! per_cu->is_debug_types);
6524 if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs))
6527 struct dwarf2_per_cu_data *iter;
6528 VEC (dwarf2_per_cu_ptr) *result_children = NULL;
6529 htab_t all_children;
6530 struct symtab *symtab = get_symtab (per_cu);
6532 /* If we don't have a symtab, we can just skip this case. */
6536 all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
6537 NULL, xcalloc, xfree);
6540 VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs,
6543 recursively_compute_inclusions (&result_children, all_children, iter);
6545 /* Now we have a transitive closure of all the included CUs, so
6546 we can convert it to a list of symtabs. */
6547 len = VEC_length (dwarf2_per_cu_ptr, result_children);
6549 = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack,
6550 (len + 1) * sizeof (struct symtab *));
6552 VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter);
6554 symtab->includes[ix] = get_symtab (iter);
6555 symtab->includes[len] = NULL;
6557 VEC_free (dwarf2_per_cu_ptr, result_children);
6558 htab_delete (all_children);
6562 /* Compute the 'includes' field for the symtabs of all the CUs we just
6566 process_cu_includes (void)
6569 struct dwarf2_per_cu_data *iter;
6572 VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus,
6576 if (! iter->is_debug_types)
6577 compute_symtab_includes (iter);
6580 VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus);
6583 /* Generate full symbol information for PER_CU, whose DIEs have
6584 already been loaded into memory. */
6587 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
6588 enum language pretend_language)
6590 struct dwarf2_cu *cu = per_cu->cu;
6591 struct objfile *objfile = per_cu->objfile;
6592 CORE_ADDR lowpc, highpc;
6593 struct symtab *symtab;
6594 struct cleanup *back_to, *delayed_list_cleanup;
6597 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6600 back_to = make_cleanup (really_free_pendings, NULL);
6601 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
6603 cu->list_in_scope = &file_symbols;
6605 cu->language = pretend_language;
6606 cu->language_defn = language_def (cu->language);
6608 /* Do line number decoding in read_file_scope () */
6609 process_die (cu->dies, cu);
6611 /* For now fudge the Go package. */
6612 if (cu->language == language_go)
6613 fixup_go_packaging (cu);
6615 /* Now that we have processed all the DIEs in the CU, all the types
6616 should be complete, and it should now be safe to compute all of the
6618 compute_delayed_physnames (cu);
6619 do_cleanups (delayed_list_cleanup);
6621 /* Some compilers don't define a DW_AT_high_pc attribute for the
6622 compilation unit. If the DW_AT_high_pc is missing, synthesize
6623 it, by scanning the DIE's below the compilation unit. */
6624 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
6626 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
6630 int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer);
6632 /* Set symtab language to language from DW_AT_language. If the
6633 compilation is from a C file generated by language preprocessors, do
6634 not set the language if it was already deduced by start_subfile. */
6635 if (!(cu->language == language_c && symtab->language != language_c))
6636 symtab->language = cu->language;
6638 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6639 produce DW_AT_location with location lists but it can be possibly
6640 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6641 there were bugs in prologue debug info, fixed later in GCC-4.5
6642 by "unwind info for epilogues" patch (which is not directly related).
6644 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6645 needed, it would be wrong due to missing DW_AT_producer there.
6647 Still one can confuse GDB by using non-standard GCC compilation
6648 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6650 if (cu->has_loclist && gcc_4_minor >= 5)
6651 symtab->locations_valid = 1;
6653 if (gcc_4_minor >= 5)
6654 symtab->epilogue_unwind_valid = 1;
6656 symtab->call_site_htab = cu->call_site_htab;
6659 if (dwarf2_per_objfile->using_index)
6660 per_cu->v.quick->symtab = symtab;
6663 struct partial_symtab *pst = per_cu->v.psymtab;
6664 pst->symtab = symtab;
6668 /* Push it for inclusion processing later. */
6669 VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu);
6671 do_cleanups (back_to);
6674 /* Generate full symbol information for type unit PER_CU, whose DIEs have
6675 already been loaded into memory. */
6678 process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
6679 enum language pretend_language)
6681 struct dwarf2_cu *cu = per_cu->cu;
6682 struct objfile *objfile = per_cu->objfile;
6683 struct symtab *symtab;
6684 struct cleanup *back_to, *delayed_list_cleanup;
6687 back_to = make_cleanup (really_free_pendings, NULL);
6688 delayed_list_cleanup = make_cleanup (free_delayed_list, cu);
6690 cu->list_in_scope = &file_symbols;
6692 cu->language = pretend_language;
6693 cu->language_defn = language_def (cu->language);
6695 /* The symbol tables are set up in read_type_unit_scope. */
6696 process_die (cu->dies, cu);
6698 /* For now fudge the Go package. */
6699 if (cu->language == language_go)
6700 fixup_go_packaging (cu);
6702 /* Now that we have processed all the DIEs in the CU, all the types
6703 should be complete, and it should now be safe to compute all of the
6705 compute_delayed_physnames (cu);
6706 do_cleanups (delayed_list_cleanup);
6708 /* TUs share symbol tables.
6709 If this is the first TU to use this symtab, complete the construction
6710 of it with end_symtab. Otherwise, complete the addition of this TU's
6711 symbols to the existing symtab. */
6712 if (per_cu->s.type_unit_group->primary_symtab == NULL)
6714 symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
6715 per_cu->s.type_unit_group->primary_symtab = symtab;
6719 /* Set symtab language to language from DW_AT_language. If the
6720 compilation is from a C file generated by language preprocessors,
6721 do not set the language if it was already deduced by
6723 if (!(cu->language == language_c && symtab->language != language_c))
6724 symtab->language = cu->language;
6729 augment_type_symtab (objfile,
6730 per_cu->s.type_unit_group->primary_symtab);
6731 symtab = per_cu->s.type_unit_group->primary_symtab;
6734 if (dwarf2_per_objfile->using_index)
6735 per_cu->v.quick->symtab = symtab;
6738 struct partial_symtab *pst = per_cu->v.psymtab;
6739 pst->symtab = symtab;
6743 do_cleanups (back_to);
6746 /* Process an imported unit DIE. */
6749 process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
6751 struct attribute *attr;
6753 /* For now we don't handle imported units in type units. */
6754 if (cu->per_cu->is_debug_types)
6756 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6757 " supported in type units [in module %s]"),
6761 attr = dwarf2_attr (die, DW_AT_import, cu);
6764 struct dwarf2_per_cu_data *per_cu;
6765 struct symtab *imported_symtab;
6768 offset = dwarf2_get_ref_die_offset (attr);
6769 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
6771 /* Queue the unit, if needed. */
6772 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
6773 load_full_comp_unit (per_cu, cu->language);
6775 VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs,
6780 /* Process a die and its children. */
6783 process_die (struct die_info *die, struct dwarf2_cu *cu)
6787 case DW_TAG_padding:
6789 case DW_TAG_compile_unit:
6790 case DW_TAG_partial_unit:
6791 read_file_scope (die, cu);
6793 case DW_TAG_type_unit:
6794 read_type_unit_scope (die, cu);
6796 case DW_TAG_subprogram:
6797 case DW_TAG_inlined_subroutine:
6798 read_func_scope (die, cu);
6800 case DW_TAG_lexical_block:
6801 case DW_TAG_try_block:
6802 case DW_TAG_catch_block:
6803 read_lexical_block_scope (die, cu);
6805 case DW_TAG_GNU_call_site:
6806 read_call_site_scope (die, cu);
6808 case DW_TAG_class_type:
6809 case DW_TAG_interface_type:
6810 case DW_TAG_structure_type:
6811 case DW_TAG_union_type:
6812 process_structure_scope (die, cu);
6814 case DW_TAG_enumeration_type:
6815 process_enumeration_scope (die, cu);
6818 /* These dies have a type, but processing them does not create
6819 a symbol or recurse to process the children. Therefore we can
6820 read them on-demand through read_type_die. */
6821 case DW_TAG_subroutine_type:
6822 case DW_TAG_set_type:
6823 case DW_TAG_array_type:
6824 case DW_TAG_pointer_type:
6825 case DW_TAG_ptr_to_member_type:
6826 case DW_TAG_reference_type:
6827 case DW_TAG_string_type:
6830 case DW_TAG_base_type:
6831 case DW_TAG_subrange_type:
6832 case DW_TAG_typedef:
6833 /* Add a typedef symbol for the type definition, if it has a
6835 new_symbol (die, read_type_die (die, cu), cu);
6837 case DW_TAG_common_block:
6838 read_common_block (die, cu);
6840 case DW_TAG_common_inclusion:
6842 case DW_TAG_namespace:
6843 processing_has_namespace_info = 1;
6844 read_namespace (die, cu);
6847 processing_has_namespace_info = 1;
6848 read_module (die, cu);
6850 case DW_TAG_imported_declaration:
6851 case DW_TAG_imported_module:
6852 processing_has_namespace_info = 1;
6853 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
6854 || cu->language != language_fortran))
6855 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
6856 dwarf_tag_name (die->tag));
6857 read_import_statement (die, cu);
6860 case DW_TAG_imported_unit:
6861 process_imported_unit_die (die, cu);
6865 new_symbol (die, NULL, cu);
6870 /* A helper function for dwarf2_compute_name which determines whether DIE
6871 needs to have the name of the scope prepended to the name listed in the
6875 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
6877 struct attribute *attr;
6881 case DW_TAG_namespace:
6882 case DW_TAG_typedef:
6883 case DW_TAG_class_type:
6884 case DW_TAG_interface_type:
6885 case DW_TAG_structure_type:
6886 case DW_TAG_union_type:
6887 case DW_TAG_enumeration_type:
6888 case DW_TAG_enumerator:
6889 case DW_TAG_subprogram:
6893 case DW_TAG_variable:
6894 case DW_TAG_constant:
6895 /* We only need to prefix "globally" visible variables. These include
6896 any variable marked with DW_AT_external or any variable that
6897 lives in a namespace. [Variables in anonymous namespaces
6898 require prefixing, but they are not DW_AT_external.] */
6900 if (dwarf2_attr (die, DW_AT_specification, cu))
6902 struct dwarf2_cu *spec_cu = cu;
6904 return die_needs_namespace (die_specification (die, &spec_cu),
6908 attr = dwarf2_attr (die, DW_AT_external, cu);
6909 if (attr == NULL && die->parent->tag != DW_TAG_namespace
6910 && die->parent->tag != DW_TAG_module)
6912 /* A variable in a lexical block of some kind does not need a
6913 namespace, even though in C++ such variables may be external
6914 and have a mangled name. */
6915 if (die->parent->tag == DW_TAG_lexical_block
6916 || die->parent->tag == DW_TAG_try_block
6917 || die->parent->tag == DW_TAG_catch_block
6918 || die->parent->tag == DW_TAG_subprogram)
6927 /* Retrieve the last character from a mem_file. */
6930 do_ui_file_peek_last (void *object, const char *buffer, long length)
6932 char *last_char_p = (char *) object;
6935 *last_char_p = buffer[length - 1];
6938 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
6939 compute the physname for the object, which include a method's:
6940 - formal parameters (C++/Java),
6941 - receiver type (Go),
6942 - return type (Java).
6944 The term "physname" is a bit confusing.
6945 For C++, for example, it is the demangled name.
6946 For Go, for example, it's the mangled name.
6948 For Ada, return the DIE's linkage name rather than the fully qualified
6949 name. PHYSNAME is ignored..
6951 The result is allocated on the objfile_obstack and canonicalized. */
6954 dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu,
6957 struct objfile *objfile = cu->objfile;
6960 name = dwarf2_name (die, cu);
6962 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
6963 compute it by typename_concat inside GDB. */
6964 if (cu->language == language_ada
6965 || (cu->language == language_fortran && physname))
6967 /* For Ada unit, we prefer the linkage name over the name, as
6968 the former contains the exported name, which the user expects
6969 to be able to reference. Ideally, we want the user to be able
6970 to reference this entity using either natural or linkage name,
6971 but we haven't started looking at this enhancement yet. */
6972 struct attribute *attr;
6974 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
6976 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
6977 if (attr && DW_STRING (attr))
6978 return DW_STRING (attr);
6981 /* These are the only languages we know how to qualify names in. */
6983 && (cu->language == language_cplus || cu->language == language_java
6984 || cu->language == language_fortran))
6986 if (die_needs_namespace (die, cu))
6990 struct ui_file *buf;
6992 prefix = determine_prefix (die, cu);
6993 buf = mem_fileopen ();
6994 if (*prefix != '\0')
6996 char *prefixed_name = typename_concat (NULL, prefix, name,
6999 fputs_unfiltered (prefixed_name, buf);
7000 xfree (prefixed_name);
7003 fputs_unfiltered (name, buf);
7005 /* Template parameters may be specified in the DIE's DW_AT_name, or
7006 as children with DW_TAG_template_type_param or
7007 DW_TAG_value_type_param. If the latter, add them to the name
7008 here. If the name already has template parameters, then
7009 skip this step; some versions of GCC emit both, and
7010 it is more efficient to use the pre-computed name.
7012 Something to keep in mind about this process: it is very
7013 unlikely, or in some cases downright impossible, to produce
7014 something that will match the mangled name of a function.
7015 If the definition of the function has the same debug info,
7016 we should be able to match up with it anyway. But fallbacks
7017 using the minimal symbol, for instance to find a method
7018 implemented in a stripped copy of libstdc++, will not work.
7019 If we do not have debug info for the definition, we will have to
7020 match them up some other way.
7022 When we do name matching there is a related problem with function
7023 templates; two instantiated function templates are allowed to
7024 differ only by their return types, which we do not add here. */
7026 if (cu->language == language_cplus && strchr (name, '<') == NULL)
7028 struct attribute *attr;
7029 struct die_info *child;
7032 die->building_fullname = 1;
7034 for (child = die->child; child != NULL; child = child->sibling)
7039 struct dwarf2_locexpr_baton *baton;
7042 if (child->tag != DW_TAG_template_type_param
7043 && child->tag != DW_TAG_template_value_param)
7048 fputs_unfiltered ("<", buf);
7052 fputs_unfiltered (", ", buf);
7054 attr = dwarf2_attr (child, DW_AT_type, cu);
7057 complaint (&symfile_complaints,
7058 _("template parameter missing DW_AT_type"));
7059 fputs_unfiltered ("UNKNOWN_TYPE", buf);
7062 type = die_type (child, cu);
7064 if (child->tag == DW_TAG_template_type_param)
7066 c_print_type (type, "", buf, -1, 0);
7070 attr = dwarf2_attr (child, DW_AT_const_value, cu);
7073 complaint (&symfile_complaints,
7074 _("template parameter missing "
7075 "DW_AT_const_value"));
7076 fputs_unfiltered ("UNKNOWN_VALUE", buf);
7080 dwarf2_const_value_attr (attr, type, name,
7081 &cu->comp_unit_obstack, cu,
7082 &value, &bytes, &baton);
7084 if (TYPE_NOSIGN (type))
7085 /* GDB prints characters as NUMBER 'CHAR'. If that's
7086 changed, this can use value_print instead. */
7087 c_printchar (value, type, buf);
7090 struct value_print_options opts;
7093 v = dwarf2_evaluate_loc_desc (type, NULL,
7097 else if (bytes != NULL)
7099 v = allocate_value (type);
7100 memcpy (value_contents_writeable (v), bytes,
7101 TYPE_LENGTH (type));
7104 v = value_from_longest (type, value);
7106 /* Specify decimal so that we do not depend on
7108 get_formatted_print_options (&opts, 'd');
7110 value_print (v, buf, &opts);
7116 die->building_fullname = 0;
7120 /* Close the argument list, with a space if necessary
7121 (nested templates). */
7122 char last_char = '\0';
7123 ui_file_put (buf, do_ui_file_peek_last, &last_char);
7124 if (last_char == '>')
7125 fputs_unfiltered (" >", buf);
7127 fputs_unfiltered (">", buf);
7131 /* For Java and C++ methods, append formal parameter type
7132 information, if PHYSNAME. */
7134 if (physname && die->tag == DW_TAG_subprogram
7135 && (cu->language == language_cplus
7136 || cu->language == language_java))
7138 struct type *type = read_type_die (die, cu);
7140 c_type_print_args (type, buf, 1, cu->language);
7142 if (cu->language == language_java)
7144 /* For java, we must append the return type to method
7146 if (die->tag == DW_TAG_subprogram)
7147 java_print_type (TYPE_TARGET_TYPE (type), "", buf,
7150 else if (cu->language == language_cplus)
7152 /* Assume that an artificial first parameter is
7153 "this", but do not crash if it is not. RealView
7154 marks unnamed (and thus unused) parameters as
7155 artificial; there is no way to differentiate
7157 if (TYPE_NFIELDS (type) > 0
7158 && TYPE_FIELD_ARTIFICIAL (type, 0)
7159 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR
7160 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type,
7162 fputs_unfiltered (" const", buf);
7166 name = ui_file_obsavestring (buf, &objfile->objfile_obstack,
7168 ui_file_delete (buf);
7170 if (cu->language == language_cplus)
7173 = dwarf2_canonicalize_name (name, cu,
7174 &objfile->objfile_obstack);
7185 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7186 If scope qualifiers are appropriate they will be added. The result
7187 will be allocated on the objfile_obstack, or NULL if the DIE does
7188 not have a name. NAME may either be from a previous call to
7189 dwarf2_name or NULL.
7191 The output string will be canonicalized (if C++/Java). */
7194 dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu)
7196 return dwarf2_compute_name (name, die, cu, 0);
7199 /* Construct a physname for the given DIE in CU. NAME may either be
7200 from a previous call to dwarf2_name or NULL. The result will be
7201 allocated on the objfile_objstack or NULL if the DIE does not have a
7204 The output string will be canonicalized (if C++/Java). */
7207 dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu)
7209 struct objfile *objfile = cu->objfile;
7210 struct attribute *attr;
7211 const char *retval, *mangled = NULL, *canon = NULL;
7212 struct cleanup *back_to;
7215 /* In this case dwarf2_compute_name is just a shortcut not building anything
7217 if (!die_needs_namespace (die, cu))
7218 return dwarf2_compute_name (name, die, cu, 1);
7220 back_to = make_cleanup (null_cleanup, NULL);
7222 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
7224 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7226 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7228 if (attr && DW_STRING (attr))
7232 mangled = DW_STRING (attr);
7234 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7235 type. It is easier for GDB users to search for such functions as
7236 `name(params)' than `long name(params)'. In such case the minimal
7237 symbol names do not match the full symbol names but for template
7238 functions there is never a need to look up their definition from their
7239 declaration so the only disadvantage remains the minimal symbol
7240 variant `long name(params)' does not have the proper inferior type.
7243 if (cu->language == language_go)
7245 /* This is a lie, but we already lie to the caller new_symbol_full.
7246 new_symbol_full assumes we return the mangled name.
7247 This just undoes that lie until things are cleaned up. */
7252 demangled = cplus_demangle (mangled,
7253 (DMGL_PARAMS | DMGL_ANSI
7254 | (cu->language == language_java
7255 ? DMGL_JAVA | DMGL_RET_POSTFIX
7260 make_cleanup (xfree, demangled);
7270 if (canon == NULL || check_physname)
7272 const char *physname = dwarf2_compute_name (name, die, cu, 1);
7274 if (canon != NULL && strcmp (physname, canon) != 0)
7276 /* It may not mean a bug in GDB. The compiler could also
7277 compute DW_AT_linkage_name incorrectly. But in such case
7278 GDB would need to be bug-to-bug compatible. */
7280 complaint (&symfile_complaints,
7281 _("Computed physname <%s> does not match demangled <%s> "
7282 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7283 physname, canon, mangled, die->offset.sect_off, objfile->name);
7285 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7286 is available here - over computed PHYSNAME. It is safer
7287 against both buggy GDB and buggy compilers. */
7301 retval = obsavestring (retval, strlen (retval),
7302 &objfile->objfile_obstack);
7304 do_cleanups (back_to);
7308 /* Read the import statement specified by the given die and record it. */
7311 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
7313 struct objfile *objfile = cu->objfile;
7314 struct attribute *import_attr;
7315 struct die_info *imported_die, *child_die;
7316 struct dwarf2_cu *imported_cu;
7317 const char *imported_name;
7318 const char *imported_name_prefix;
7319 const char *canonical_name;
7320 const char *import_alias;
7321 const char *imported_declaration = NULL;
7322 const char *import_prefix;
7323 VEC (const_char_ptr) *excludes = NULL;
7324 struct cleanup *cleanups;
7328 import_attr = dwarf2_attr (die, DW_AT_import, cu);
7329 if (import_attr == NULL)
7331 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
7332 dwarf_tag_name (die->tag));
7337 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
7338 imported_name = dwarf2_name (imported_die, imported_cu);
7339 if (imported_name == NULL)
7341 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7343 The import in the following code:
7357 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7358 <52> DW_AT_decl_file : 1
7359 <53> DW_AT_decl_line : 6
7360 <54> DW_AT_import : <0x75>
7361 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7363 <5b> DW_AT_decl_file : 1
7364 <5c> DW_AT_decl_line : 2
7365 <5d> DW_AT_type : <0x6e>
7367 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7368 <76> DW_AT_byte_size : 4
7369 <77> DW_AT_encoding : 5 (signed)
7371 imports the wrong die ( 0x75 instead of 0x58 ).
7372 This case will be ignored until the gcc bug is fixed. */
7376 /* Figure out the local name after import. */
7377 import_alias = dwarf2_name (die, cu);
7379 /* Figure out where the statement is being imported to. */
7380 import_prefix = determine_prefix (die, cu);
7382 /* Figure out what the scope of the imported die is and prepend it
7383 to the name of the imported die. */
7384 imported_name_prefix = determine_prefix (imported_die, imported_cu);
7386 if (imported_die->tag != DW_TAG_namespace
7387 && imported_die->tag != DW_TAG_module)
7389 imported_declaration = imported_name;
7390 canonical_name = imported_name_prefix;
7392 else if (strlen (imported_name_prefix) > 0)
7394 temp = alloca (strlen (imported_name_prefix)
7395 + 2 + strlen (imported_name) + 1);
7396 strcpy (temp, imported_name_prefix);
7397 strcat (temp, "::");
7398 strcat (temp, imported_name);
7399 canonical_name = temp;
7402 canonical_name = imported_name;
7404 cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes);
7406 if (die->tag == DW_TAG_imported_module && cu->language == language_fortran)
7407 for (child_die = die->child; child_die && child_die->tag;
7408 child_die = sibling_die (child_die))
7410 /* DWARF-4: A Fortran use statement with a “rename list” may be
7411 represented by an imported module entry with an import attribute
7412 referring to the module and owned entries corresponding to those
7413 entities that are renamed as part of being imported. */
7415 if (child_die->tag != DW_TAG_imported_declaration)
7417 complaint (&symfile_complaints,
7418 _("child DW_TAG_imported_declaration expected "
7419 "- DIE at 0x%x [in module %s]"),
7420 child_die->offset.sect_off, objfile->name);
7424 import_attr = dwarf2_attr (child_die, DW_AT_import, cu);
7425 if (import_attr == NULL)
7427 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
7428 dwarf_tag_name (child_die->tag));
7433 imported_die = follow_die_ref_or_sig (child_die, import_attr,
7435 imported_name = dwarf2_name (imported_die, imported_cu);
7436 if (imported_name == NULL)
7438 complaint (&symfile_complaints,
7439 _("child DW_TAG_imported_declaration has unknown "
7440 "imported name - DIE at 0x%x [in module %s]"),
7441 child_die->offset.sect_off, objfile->name);
7445 VEC_safe_push (const_char_ptr, excludes, imported_name);
7447 process_die (child_die, cu);
7450 cp_add_using_directive (import_prefix,
7453 imported_declaration,
7455 &objfile->objfile_obstack);
7457 do_cleanups (cleanups);
7460 /* Cleanup function for handle_DW_AT_stmt_list. */
7463 free_cu_line_header (void *arg)
7465 struct dwarf2_cu *cu = arg;
7467 free_line_header (cu->line_header);
7468 cu->line_header = NULL;
7472 find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu,
7473 char **name, char **comp_dir)
7475 struct attribute *attr;
7480 /* Find the filename. Do not use dwarf2_name here, since the filename
7481 is not a source language identifier. */
7482 attr = dwarf2_attr (die, DW_AT_name, cu);
7485 *name = DW_STRING (attr);
7488 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
7490 *comp_dir = DW_STRING (attr);
7491 else if (*name != NULL && IS_ABSOLUTE_PATH (*name))
7493 *comp_dir = ldirname (*name);
7494 if (*comp_dir != NULL)
7495 make_cleanup (xfree, *comp_dir);
7497 if (*comp_dir != NULL)
7499 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7500 directory, get rid of it. */
7501 char *cp = strchr (*comp_dir, ':');
7503 if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/')
7508 *name = "<unknown>";
7511 /* Handle DW_AT_stmt_list for a compilation unit.
7512 DIE is the DW_TAG_compile_unit die for CU.
7513 COMP_DIR is the compilation directory.
7514 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7517 handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu,
7518 const char *comp_dir)
7520 struct attribute *attr;
7522 gdb_assert (! cu->per_cu->is_debug_types);
7524 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
7527 unsigned int line_offset = DW_UNSND (attr);
7528 struct line_header *line_header
7529 = dwarf_decode_line_header (line_offset, cu);
7533 cu->line_header = line_header;
7534 make_cleanup (free_cu_line_header, cu);
7535 dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1);
7540 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7543 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
7545 struct objfile *objfile = dwarf2_per_objfile->objfile;
7546 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
7547 CORE_ADDR lowpc = ((CORE_ADDR) -1);
7548 CORE_ADDR highpc = ((CORE_ADDR) 0);
7549 struct attribute *attr;
7551 char *comp_dir = NULL;
7552 struct die_info *child_die;
7553 bfd *abfd = objfile->obfd;
7556 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7558 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
7560 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7561 from finish_block. */
7562 if (lowpc == ((CORE_ADDR) -1))
7567 find_file_and_directory (die, cu, &name, &comp_dir);
7569 prepare_one_comp_unit (cu, die, cu->language);
7571 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7572 standardised yet. As a workaround for the language detection we fall
7573 back to the DW_AT_producer string. */
7574 if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL)
7575 cu->language = language_opencl;
7577 /* Similar hack for Go. */
7578 if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL)
7579 set_cu_language (DW_LANG_Go, cu);
7581 dwarf2_start_symtab (cu, name, comp_dir, lowpc);
7583 /* Decode line number information if present. We do this before
7584 processing child DIEs, so that the line header table is available
7585 for DW_AT_decl_file. */
7586 handle_DW_AT_stmt_list (die, cu, comp_dir);
7588 /* Process all dies in compilation unit. */
7589 if (die->child != NULL)
7591 child_die = die->child;
7592 while (child_die && child_die->tag)
7594 process_die (child_die, cu);
7595 child_die = sibling_die (child_die);
7599 /* Decode macro information, if present. Dwarf 2 macro information
7600 refers to information in the line number info statement program
7601 header, so we can only read it if we've read the header
7603 attr = dwarf2_attr (die, DW_AT_GNU_macros, cu);
7604 if (attr && cu->line_header)
7606 if (dwarf2_attr (die, DW_AT_macro_info, cu))
7607 complaint (&symfile_complaints,
7608 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7610 dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1);
7614 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
7615 if (attr && cu->line_header)
7617 unsigned int macro_offset = DW_UNSND (attr);
7619 dwarf_decode_macros (cu, macro_offset, comp_dir, 0);
7623 do_cleanups (back_to);
7626 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
7627 Create the set of symtabs used by this TU, or if this TU is sharing
7628 symtabs with another TU and the symtabs have already been created
7629 then restore those symtabs in the line header.
7630 We don't need the pc/line-number mapping for type units. */
7633 setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
7635 struct objfile *objfile = dwarf2_per_objfile->objfile;
7636 struct dwarf2_per_cu_data *per_cu = cu->per_cu;
7637 struct type_unit_group *tu_group;
7639 struct line_header *lh;
7640 struct attribute *attr;
7641 unsigned int i, line_offset;
7643 gdb_assert (per_cu->is_debug_types);
7645 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
7647 /* If we're using .gdb_index (includes -readnow) then
7648 per_cu->s.type_unit_group may not have been set up yet. */
7649 if (per_cu->s.type_unit_group == NULL)
7650 per_cu->s.type_unit_group = get_type_unit_group (per_cu, attr);
7651 tu_group = per_cu->s.type_unit_group;
7653 /* If we've already processed this stmt_list there's no real need to
7654 do it again, we could fake it and just recreate the part we need
7655 (file name,index -> symtab mapping). If data shows this optimization
7656 is useful we can do it then. */
7657 first_time = tu_group->primary_symtab == NULL;
7659 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
7664 line_offset = DW_UNSND (attr);
7665 lh = dwarf_decode_line_header (line_offset, cu);
7670 dwarf2_start_symtab (cu, "", NULL, 0);
7673 gdb_assert (tu_group->symtabs == NULL);
7676 /* Note: The primary symtab will get allocated at the end. */
7680 cu->line_header = lh;
7681 make_cleanup (free_cu_line_header, cu);
7685 dwarf2_start_symtab (cu, "", NULL, 0);
7687 tu_group->num_symtabs = lh->num_file_names;
7688 tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names);
7690 for (i = 0; i < lh->num_file_names; ++i)
7693 struct file_entry *fe = &lh->file_names[i];
7696 dir = lh->include_dirs[fe->dir_index - 1];
7697 dwarf2_start_subfile (fe->name, dir, NULL);
7699 /* Note: We don't have to watch for the main subfile here, type units
7700 don't have DW_AT_name. */
7702 if (current_subfile->symtab == NULL)
7704 /* NOTE: start_subfile will recognize when it's been passed
7705 a file it has already seen. So we can't assume there's a
7706 simple mapping from lh->file_names to subfiles,
7707 lh->file_names may contain dups. */
7708 current_subfile->symtab = allocate_symtab (current_subfile->name,
7712 fe->symtab = current_subfile->symtab;
7713 tu_group->symtabs[i] = fe->symtab;
7720 for (i = 0; i < lh->num_file_names; ++i)
7722 struct file_entry *fe = &lh->file_names[i];
7724 fe->symtab = tu_group->symtabs[i];
7728 /* The main symtab is allocated last. Type units don't have DW_AT_name
7729 so they don't have a "real" (so to speak) symtab anyway.
7730 There is later code that will assign the main symtab to all symbols
7731 that don't have one. We need to handle the case of a symbol with a
7732 missing symtab (DW_AT_decl_file) anyway. */
7735 /* Process DW_TAG_type_unit.
7736 For TUs we want to skip the first top level sibling if it's not the
7737 actual type being defined by this TU. In this case the first top
7738 level sibling is there to provide context only. */
7741 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
7743 struct die_info *child_die;
7745 prepare_one_comp_unit (cu, die, language_minimal);
7747 /* Initialize (or reinitialize) the machinery for building symtabs.
7748 We do this before processing child DIEs, so that the line header table
7749 is available for DW_AT_decl_file. */
7750 setup_type_unit_groups (die, cu);
7752 if (die->child != NULL)
7754 child_die = die->child;
7755 while (child_die && child_die->tag)
7757 process_die (child_die, cu);
7758 child_die = sibling_die (child_die);
7766 hash_dwo_file (const void *item)
7768 const struct dwo_file *dwo_file = item;
7770 return htab_hash_string (dwo_file->dwo_name);
7774 eq_dwo_file (const void *item_lhs, const void *item_rhs)
7776 const struct dwo_file *lhs = item_lhs;
7777 const struct dwo_file *rhs = item_rhs;
7779 return strcmp (lhs->dwo_name, rhs->dwo_name) == 0;
7782 /* Allocate a hash table for DWO files. */
7785 allocate_dwo_file_hash_table (void)
7787 struct objfile *objfile = dwarf2_per_objfile->objfile;
7789 return htab_create_alloc_ex (41,
7793 &objfile->objfile_obstack,
7794 hashtab_obstack_allocate,
7795 dummy_obstack_deallocate);
7799 hash_dwo_unit (const void *item)
7801 const struct dwo_unit *dwo_unit = item;
7803 /* This drops the top 32 bits of the id, but is ok for a hash. */
7804 return dwo_unit->signature;
7808 eq_dwo_unit (const void *item_lhs, const void *item_rhs)
7810 const struct dwo_unit *lhs = item_lhs;
7811 const struct dwo_unit *rhs = item_rhs;
7813 /* The signature is assumed to be unique within the DWO file.
7814 So while object file CU dwo_id's always have the value zero,
7815 that's OK, assuming each object file DWO file has only one CU,
7816 and that's the rule for now. */
7817 return lhs->signature == rhs->signature;
7820 /* Allocate a hash table for DWO CUs,TUs.
7821 There is one of these tables for each of CUs,TUs for each DWO file. */
7824 allocate_dwo_unit_table (struct objfile *objfile)
7826 /* Start out with a pretty small number.
7827 Generally DWO files contain only one CU and maybe some TUs. */
7828 return htab_create_alloc_ex (3,
7832 &objfile->objfile_obstack,
7833 hashtab_obstack_allocate,
7834 dummy_obstack_deallocate);
7837 /* This function is mapped across the sections and remembers the offset and
7838 size of each of the DWO debugging sections we are interested in. */
7841 dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_file_ptr)
7843 struct dwo_file *dwo_file = dwo_file_ptr;
7844 const struct dwo_section_names *names = &dwo_section_names;
7846 if (section_is_p (sectp->name, &names->abbrev_dwo))
7848 dwo_file->sections.abbrev.asection = sectp;
7849 dwo_file->sections.abbrev.size = bfd_get_section_size (sectp);
7851 else if (section_is_p (sectp->name, &names->info_dwo))
7853 dwo_file->sections.info.asection = sectp;
7854 dwo_file->sections.info.size = bfd_get_section_size (sectp);
7856 else if (section_is_p (sectp->name, &names->line_dwo))
7858 dwo_file->sections.line.asection = sectp;
7859 dwo_file->sections.line.size = bfd_get_section_size (sectp);
7861 else if (section_is_p (sectp->name, &names->loc_dwo))
7863 dwo_file->sections.loc.asection = sectp;
7864 dwo_file->sections.loc.size = bfd_get_section_size (sectp);
7866 else if (section_is_p (sectp->name, &names->macinfo_dwo))
7868 dwo_file->sections.macinfo.asection = sectp;
7869 dwo_file->sections.macinfo.size = bfd_get_section_size (sectp);
7871 else if (section_is_p (sectp->name, &names->macro_dwo))
7873 dwo_file->sections.macro.asection = sectp;
7874 dwo_file->sections.macro.size = bfd_get_section_size (sectp);
7876 else if (section_is_p (sectp->name, &names->str_dwo))
7878 dwo_file->sections.str.asection = sectp;
7879 dwo_file->sections.str.size = bfd_get_section_size (sectp);
7881 else if (section_is_p (sectp->name, &names->str_offsets_dwo))
7883 dwo_file->sections.str_offsets.asection = sectp;
7884 dwo_file->sections.str_offsets.size = bfd_get_section_size (sectp);
7886 else if (section_is_p (sectp->name, &names->types_dwo))
7888 struct dwarf2_section_info type_section;
7890 memset (&type_section, 0, sizeof (type_section));
7891 type_section.asection = sectp;
7892 type_section.size = bfd_get_section_size (sectp);
7893 VEC_safe_push (dwarf2_section_info_def, dwo_file->sections.types,
7898 /* Structure used to pass data to create_debug_info_hash_table_reader. */
7900 struct create_dwo_info_table_data
7902 struct dwo_file *dwo_file;
7906 /* die_reader_func for create_debug_info_hash_table. */
7909 create_debug_info_hash_table_reader (const struct die_reader_specs *reader,
7911 struct die_info *comp_unit_die,
7915 struct dwarf2_cu *cu = reader->cu;
7916 struct objfile *objfile = dwarf2_per_objfile->objfile;
7917 sect_offset offset = cu->per_cu->offset;
7918 struct dwarf2_section_info *section = cu->per_cu->info_or_types_section;
7919 struct create_dwo_info_table_data *data = datap;
7920 struct dwo_file *dwo_file = data->dwo_file;
7921 htab_t cu_htab = data->cu_htab;
7923 struct attribute *attr;
7924 struct dwo_unit *dwo_unit;
7926 attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
7929 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
7930 " its dwo_id [in module %s]"),
7931 offset.sect_off, dwo_file->dwo_name);
7935 dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
7936 dwo_unit->dwo_file = dwo_file;
7937 dwo_unit->signature = DW_UNSND (attr);
7938 dwo_unit->info_or_types_section = section;
7939 dwo_unit->offset = offset;
7940 dwo_unit->length = cu->per_cu->length;
7942 slot = htab_find_slot (cu_htab, dwo_unit, INSERT);
7943 gdb_assert (slot != NULL);
7946 const struct dwo_unit *dup_dwo_unit = *slot;
7948 complaint (&symfile_complaints,
7949 _("debug entry at offset 0x%x is duplicate to the entry at"
7950 " offset 0x%x, dwo_id 0x%s [in module %s]"),
7951 offset.sect_off, dup_dwo_unit->offset.sect_off,
7952 phex (dwo_unit->signature, sizeof (dwo_unit->signature)),
7953 dwo_file->dwo_name);
7958 if (dwarf2_read_debug)
7959 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id 0x%s\n",
7961 phex (dwo_unit->signature,
7962 sizeof (dwo_unit->signature)));
7965 /* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
7968 create_debug_info_hash_table (struct dwo_file *dwo_file)
7970 struct objfile *objfile = dwarf2_per_objfile->objfile;
7971 struct dwarf2_section_info *section = &dwo_file->sections.info;
7974 gdb_byte *info_ptr, *end_ptr;
7975 struct create_dwo_info_table_data create_dwo_info_table_data;
7977 dwarf2_read_section (objfile, section);
7978 info_ptr = section->buffer;
7980 if (info_ptr == NULL)
7983 /* We can't set abfd until now because the section may be empty or
7984 not present, in which case section->asection will be NULL. */
7985 abfd = section->asection->owner;
7987 if (dwarf2_read_debug)
7988 fprintf_unfiltered (gdb_stdlog, "Reading .debug_info.dwo for %s:\n",
7989 bfd_get_filename (abfd));
7991 cu_htab = allocate_dwo_unit_table (objfile);
7993 create_dwo_info_table_data.dwo_file = dwo_file;
7994 create_dwo_info_table_data.cu_htab = cu_htab;
7996 end_ptr = info_ptr + section->size;
7997 while (info_ptr < end_ptr)
7999 struct dwarf2_per_cu_data per_cu;
8001 memset (&per_cu, 0, sizeof (per_cu));
8002 per_cu.objfile = objfile;
8003 per_cu.is_debug_types = 0;
8004 per_cu.offset.sect_off = info_ptr - section->buffer;
8005 per_cu.info_or_types_section = section;
8007 init_cutu_and_read_dies_no_follow (&per_cu,
8008 &dwo_file->sections.abbrev,
8010 create_debug_info_hash_table_reader,
8011 &create_dwo_info_table_data);
8013 info_ptr += per_cu.length;
8019 /* Subroutine of open_dwo_file to simplify it.
8020 Open the file specified by FILE_NAME and hand it off to BFD for
8021 preliminary analysis. Return a newly initialized bfd *, which
8022 includes a canonicalized copy of FILE_NAME.
8023 In case of trouble, return NULL.
8024 NOTE: This function is derived from symfile_bfd_open. */
8027 try_open_dwo_file (const char *file_name)
8031 char *absolute_name;
8033 desc = openp (debug_file_directory, OPF_TRY_CWD_FIRST, file_name,
8034 O_RDONLY | O_BINARY, &absolute_name);
8038 sym_bfd = bfd_fopen (absolute_name, gnutarget, FOPEN_RB, desc);
8041 xfree (absolute_name);
8044 bfd_set_cacheable (sym_bfd, 1);
8046 if (!bfd_check_format (sym_bfd, bfd_object))
8048 bfd_close (sym_bfd); /* This also closes desc. */
8049 xfree (absolute_name);
8053 /* bfd_usrdata exists for applications and libbfd must not touch it. */
8054 gdb_assert (bfd_usrdata (sym_bfd) == NULL);
8059 /* Try to open DWO file DWO_NAME.
8060 COMP_DIR is the DW_AT_comp_dir attribute.
8061 The result is the bfd handle of the file.
8062 If there is a problem finding or opening the file, return NULL.
8063 Upon success, the canonicalized path of the file is stored in the bfd,
8064 same as symfile_bfd_open. */
8067 open_dwo_file (const char *dwo_name, const char *comp_dir)
8071 if (IS_ABSOLUTE_PATH (dwo_name))
8072 return try_open_dwo_file (dwo_name);
8074 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8076 if (comp_dir != NULL)
8078 char *path_to_try = concat (comp_dir, SLASH_STRING, dwo_name, NULL);
8080 /* NOTE: If comp_dir is a relative path, this will also try the
8081 search path, which seems useful. */
8082 abfd = try_open_dwo_file (path_to_try);
8083 xfree (path_to_try);
8088 /* That didn't work, try debug-file-directory, which, despite its name,
8089 is a list of paths. */
8091 if (*debug_file_directory == '\0')
8094 return try_open_dwo_file (dwo_name);
8097 /* Initialize the use of the DWO file specified by DWO_NAME. */
8099 static struct dwo_file *
8100 init_dwo_file (const char *dwo_name, const char *comp_dir)
8102 struct objfile *objfile = dwarf2_per_objfile->objfile;
8103 struct dwo_file *dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack,
8106 struct cleanup *cleanups;
8108 if (dwarf2_read_debug)
8109 fprintf_unfiltered (gdb_stdlog, "Reading DWO file %s:\n", dwo_name);
8111 abfd = open_dwo_file (dwo_name, comp_dir);
8114 dwo_file->dwo_name = dwo_name;
8115 dwo_file->dwo_bfd = abfd;
8117 cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file);
8119 bfd_map_over_sections (abfd, dwarf2_locate_dwo_sections, dwo_file);
8121 dwo_file->cus = create_debug_info_hash_table (dwo_file);
8123 dwo_file->tus = create_debug_types_hash_table (dwo_file,
8124 dwo_file->sections.types);
8126 discard_cleanups (cleanups);
8131 /* Lookup DWO file DWO_NAME. */
8133 static struct dwo_file *
8134 lookup_dwo_file (char *dwo_name, const char *comp_dir)
8136 struct dwo_file *dwo_file;
8137 struct dwo_file find_entry;
8140 if (dwarf2_per_objfile->dwo_files == NULL)
8141 dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table ();
8143 /* Have we already seen this DWO file? */
8144 find_entry.dwo_name = dwo_name;
8145 slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT);
8147 /* If not, read it in and build a table of the DWOs it contains. */
8149 *slot = init_dwo_file (dwo_name, comp_dir);
8151 /* NOTE: This will be NULL if unable to open the file. */
8157 /* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
8158 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8159 SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
8160 nomenclature as TUs).
8161 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8162 (dwo_id mismatch or couldn't find the DWO file). */
8164 static struct dwo_unit *
8165 lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu,
8166 char *dwo_name, const char *comp_dir,
8169 struct objfile *objfile = dwarf2_per_objfile->objfile;
8170 struct dwo_file *dwo_file;
8172 dwo_file = lookup_dwo_file (dwo_name, comp_dir);
8173 if (dwo_file == NULL)
8176 /* Look up the DWO using its signature(dwo_id). */
8178 if (dwo_file->cus != NULL)
8180 struct dwo_unit find_dwo_cu, *dwo_cu;
8182 find_dwo_cu.signature = signature;
8183 dwo_cu = htab_find (dwo_file->cus, &find_dwo_cu);
8189 /* We didn't find it. This must mean a dwo_id mismatch. */
8191 complaint (&symfile_complaints,
8192 _("Could not find DWO CU referenced by CU at offset 0x%x"
8194 this_cu->offset.sect_off, objfile->name);
8198 /* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
8199 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8200 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8201 (dwo_id mismatch or couldn't find the DWO file). */
8203 static struct dwo_unit *
8204 lookup_dwo_type_unit (struct signatured_type *this_tu,
8205 char *dwo_name, const char *comp_dir)
8207 struct objfile *objfile = dwarf2_per_objfile->objfile;
8208 struct dwo_file *dwo_file;
8210 dwo_file = lookup_dwo_file (dwo_name, comp_dir);
8211 if (dwo_file == NULL)
8214 /* Look up the DWO using its signature(dwo_id). */
8216 if (dwo_file->tus != NULL)
8218 struct dwo_unit find_dwo_tu, *dwo_tu;
8220 find_dwo_tu.signature = this_tu->signature;
8221 dwo_tu = htab_find (dwo_file->tus, &find_dwo_tu);
8227 /* We didn't find it. This must mean a dwo_id mismatch. */
8229 complaint (&symfile_complaints,
8230 _("Could not find DWO TU referenced by TU at offset 0x%x"
8232 this_tu->per_cu.offset.sect_off, objfile->name);
8236 /* Free all resources associated with DWO_FILE.
8237 Close the DWO file and munmap the sections.
8238 All memory should be on the objfile obstack. */
8241 free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile)
8244 struct dwarf2_section_info *section;
8246 gdb_assert (dwo_file->dwo_bfd != objfile->obfd);
8247 bfd_close (dwo_file->dwo_bfd);
8249 munmap_section_buffer (&dwo_file->sections.abbrev);
8250 munmap_section_buffer (&dwo_file->sections.info);
8251 munmap_section_buffer (&dwo_file->sections.line);
8252 munmap_section_buffer (&dwo_file->sections.loc);
8253 munmap_section_buffer (&dwo_file->sections.str);
8254 munmap_section_buffer (&dwo_file->sections.str_offsets);
8257 VEC_iterate (dwarf2_section_info_def, dwo_file->sections.types,
8260 munmap_section_buffer (section);
8262 VEC_free (dwarf2_section_info_def, dwo_file->sections.types);
8265 /* Wrapper for free_dwo_file for use in cleanups. */
8268 free_dwo_file_cleanup (void *arg)
8270 struct dwo_file *dwo_file = (struct dwo_file *) arg;
8271 struct objfile *objfile = dwarf2_per_objfile->objfile;
8273 free_dwo_file (dwo_file, objfile);
8276 /* Traversal function for free_dwo_files. */
8279 free_dwo_file_from_slot (void **slot, void *info)
8281 struct dwo_file *dwo_file = (struct dwo_file *) *slot;
8282 struct objfile *objfile = (struct objfile *) info;
8284 free_dwo_file (dwo_file, objfile);
8289 /* Free all resources associated with DWO_FILES. */
8292 free_dwo_files (htab_t dwo_files, struct objfile *objfile)
8294 htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile);
8297 /* Read in various DIEs. */
8299 /* qsort helper for inherit_abstract_dies. */
8302 unsigned_int_compar (const void *ap, const void *bp)
8304 unsigned int a = *(unsigned int *) ap;
8305 unsigned int b = *(unsigned int *) bp;
8307 return (a > b) - (b > a);
8310 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
8311 Inherit only the children of the DW_AT_abstract_origin DIE not being
8312 already referenced by DW_AT_abstract_origin from the children of the
8316 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
8318 struct die_info *child_die;
8319 unsigned die_children_count;
8320 /* CU offsets which were referenced by children of the current DIE. */
8321 sect_offset *offsets;
8322 sect_offset *offsets_end, *offsetp;
8323 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
8324 struct die_info *origin_die;
8325 /* Iterator of the ORIGIN_DIE children. */
8326 struct die_info *origin_child_die;
8327 struct cleanup *cleanups;
8328 struct attribute *attr;
8329 struct dwarf2_cu *origin_cu;
8330 struct pending **origin_previous_list_in_scope;
8332 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
8336 /* Note that following die references may follow to a die in a
8340 origin_die = follow_die_ref (die, attr, &origin_cu);
8342 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
8344 origin_previous_list_in_scope = origin_cu->list_in_scope;
8345 origin_cu->list_in_scope = cu->list_in_scope;
8347 if (die->tag != origin_die->tag
8348 && !(die->tag == DW_TAG_inlined_subroutine
8349 && origin_die->tag == DW_TAG_subprogram))
8350 complaint (&symfile_complaints,
8351 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
8352 die->offset.sect_off, origin_die->offset.sect_off);
8354 child_die = die->child;
8355 die_children_count = 0;
8356 while (child_die && child_die->tag)
8358 child_die = sibling_die (child_die);
8359 die_children_count++;
8361 offsets = xmalloc (sizeof (*offsets) * die_children_count);
8362 cleanups = make_cleanup (xfree, offsets);
8364 offsets_end = offsets;
8365 child_die = die->child;
8366 while (child_die && child_die->tag)
8368 /* For each CHILD_DIE, find the corresponding child of
8369 ORIGIN_DIE. If there is more than one layer of
8370 DW_AT_abstract_origin, follow them all; there shouldn't be,
8371 but GCC versions at least through 4.4 generate this (GCC PR
8373 struct die_info *child_origin_die = child_die;
8374 struct dwarf2_cu *child_origin_cu = cu;
8378 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin,
8382 child_origin_die = follow_die_ref (child_origin_die, attr,
8386 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
8387 counterpart may exist. */
8388 if (child_origin_die != child_die)
8390 if (child_die->tag != child_origin_die->tag
8391 && !(child_die->tag == DW_TAG_inlined_subroutine
8392 && child_origin_die->tag == DW_TAG_subprogram))
8393 complaint (&symfile_complaints,
8394 _("Child DIE 0x%x and its abstract origin 0x%x have "
8395 "different tags"), child_die->offset.sect_off,
8396 child_origin_die->offset.sect_off);
8397 if (child_origin_die->parent != origin_die)
8398 complaint (&symfile_complaints,
8399 _("Child DIE 0x%x and its abstract origin 0x%x have "
8400 "different parents"), child_die->offset.sect_off,
8401 child_origin_die->offset.sect_off);
8403 *offsets_end++ = child_origin_die->offset;
8405 child_die = sibling_die (child_die);
8407 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
8408 unsigned_int_compar);
8409 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
8410 if (offsetp[-1].sect_off == offsetp->sect_off)
8411 complaint (&symfile_complaints,
8412 _("Multiple children of DIE 0x%x refer "
8413 "to DIE 0x%x as their abstract origin"),
8414 die->offset.sect_off, offsetp->sect_off);
8417 origin_child_die = origin_die->child;
8418 while (origin_child_die && origin_child_die->tag)
8420 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
8421 while (offsetp < offsets_end
8422 && offsetp->sect_off < origin_child_die->offset.sect_off)
8424 if (offsetp >= offsets_end
8425 || offsetp->sect_off > origin_child_die->offset.sect_off)
8427 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
8428 process_die (origin_child_die, origin_cu);
8430 origin_child_die = sibling_die (origin_child_die);
8432 origin_cu->list_in_scope = origin_previous_list_in_scope;
8434 do_cleanups (cleanups);
8438 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
8440 struct objfile *objfile = cu->objfile;
8441 struct context_stack *new;
8444 struct die_info *child_die;
8445 struct attribute *attr, *call_line, *call_file;
8448 struct block *block;
8449 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
8450 VEC (symbolp) *template_args = NULL;
8451 struct template_symbol *templ_func = NULL;
8455 /* If we do not have call site information, we can't show the
8456 caller of this inlined function. That's too confusing, so
8457 only use the scope for local variables. */
8458 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
8459 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
8460 if (call_line == NULL || call_file == NULL)
8462 read_lexical_block_scope (die, cu);
8467 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8469 name = dwarf2_name (die, cu);
8471 /* Ignore functions with missing or empty names. These are actually
8472 illegal according to the DWARF standard. */
8475 complaint (&symfile_complaints,
8476 _("missing name for subprogram DIE at %d"),
8477 die->offset.sect_off);
8481 /* Ignore functions with missing or invalid low and high pc attributes. */
8482 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
8484 attr = dwarf2_attr (die, DW_AT_external, cu);
8485 if (!attr || !DW_UNSND (attr))
8486 complaint (&symfile_complaints,
8487 _("cannot get low and high bounds "
8488 "for subprogram DIE at %d"),
8489 die->offset.sect_off);
8496 /* If we have any template arguments, then we must allocate a
8497 different sort of symbol. */
8498 for (child_die = die->child; child_die; child_die = sibling_die (child_die))
8500 if (child_die->tag == DW_TAG_template_type_param
8501 || child_die->tag == DW_TAG_template_value_param)
8503 templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack,
8504 struct template_symbol);
8505 templ_func->base.is_cplus_template_function = 1;
8510 new = push_context (0, lowpc);
8511 new->name = new_symbol_full (die, read_type_die (die, cu), cu,
8512 (struct symbol *) templ_func);
8514 /* If there is a location expression for DW_AT_frame_base, record
8516 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
8518 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
8519 expression is being recorded directly in the function's symbol
8520 and not in a separate frame-base object. I guess this hack is
8521 to avoid adding some sort of frame-base adjunct/annex to the
8522 function's symbol :-(. The problem with doing this is that it
8523 results in a function symbol with a location expression that
8524 has nothing to do with the location of the function, ouch! The
8525 relationship should be: a function's symbol has-a frame base; a
8526 frame-base has-a location expression. */
8527 dwarf2_symbol_mark_computed (attr, new->name, cu);
8529 cu->list_in_scope = &local_symbols;
8531 if (die->child != NULL)
8533 child_die = die->child;
8534 while (child_die && child_die->tag)
8536 if (child_die->tag == DW_TAG_template_type_param
8537 || child_die->tag == DW_TAG_template_value_param)
8539 struct symbol *arg = new_symbol (child_die, NULL, cu);
8542 VEC_safe_push (symbolp, template_args, arg);
8545 process_die (child_die, cu);
8546 child_die = sibling_die (child_die);
8550 inherit_abstract_dies (die, cu);
8552 /* If we have a DW_AT_specification, we might need to import using
8553 directives from the context of the specification DIE. See the
8554 comment in determine_prefix. */
8555 if (cu->language == language_cplus
8556 && dwarf2_attr (die, DW_AT_specification, cu))
8558 struct dwarf2_cu *spec_cu = cu;
8559 struct die_info *spec_die = die_specification (die, &spec_cu);
8563 child_die = spec_die->child;
8564 while (child_die && child_die->tag)
8566 if (child_die->tag == DW_TAG_imported_module)
8567 process_die (child_die, spec_cu);
8568 child_die = sibling_die (child_die);
8571 /* In some cases, GCC generates specification DIEs that
8572 themselves contain DW_AT_specification attributes. */
8573 spec_die = die_specification (spec_die, &spec_cu);
8577 new = pop_context ();
8578 /* Make a block for the local symbols within. */
8579 block = finish_block (new->name, &local_symbols, new->old_blocks,
8580 lowpc, highpc, objfile);
8582 /* For C++, set the block's scope. */
8583 if (cu->language == language_cplus || cu->language == language_fortran)
8584 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
8585 determine_prefix (die, cu),
8586 processing_has_namespace_info);
8588 /* If we have address ranges, record them. */
8589 dwarf2_record_block_ranges (die, block, baseaddr, cu);
8591 /* Attach template arguments to function. */
8592 if (! VEC_empty (symbolp, template_args))
8594 gdb_assert (templ_func != NULL);
8596 templ_func->n_template_arguments = VEC_length (symbolp, template_args);
8597 templ_func->template_arguments
8598 = obstack_alloc (&objfile->objfile_obstack,
8599 (templ_func->n_template_arguments
8600 * sizeof (struct symbol *)));
8601 memcpy (templ_func->template_arguments,
8602 VEC_address (symbolp, template_args),
8603 (templ_func->n_template_arguments * sizeof (struct symbol *)));
8604 VEC_free (symbolp, template_args);
8607 /* In C++, we can have functions nested inside functions (e.g., when
8608 a function declares a class that has methods). This means that
8609 when we finish processing a function scope, we may need to go
8610 back to building a containing block's symbol lists. */
8611 local_symbols = new->locals;
8612 param_symbols = new->params;
8613 using_directives = new->using_directives;
8615 /* If we've finished processing a top-level function, subsequent
8616 symbols go in the file symbol list. */
8617 if (outermost_context_p ())
8618 cu->list_in_scope = &file_symbols;
8621 /* Process all the DIES contained within a lexical block scope. Start
8622 a new scope, process the dies, and then close the scope. */
8625 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
8627 struct objfile *objfile = cu->objfile;
8628 struct context_stack *new;
8629 CORE_ADDR lowpc, highpc;
8630 struct die_info *child_die;
8633 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8635 /* Ignore blocks with missing or invalid low and high pc attributes. */
8636 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
8637 as multiple lexical blocks? Handling children in a sane way would
8638 be nasty. Might be easier to properly extend generic blocks to
8640 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
8645 push_context (0, lowpc);
8646 if (die->child != NULL)
8648 child_die = die->child;
8649 while (child_die && child_die->tag)
8651 process_die (child_die, cu);
8652 child_die = sibling_die (child_die);
8655 new = pop_context ();
8657 if (local_symbols != NULL || using_directives != NULL)
8660 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
8663 /* Note that recording ranges after traversing children, as we
8664 do here, means that recording a parent's ranges entails
8665 walking across all its children's ranges as they appear in
8666 the address map, which is quadratic behavior.
8668 It would be nicer to record the parent's ranges before
8669 traversing its children, simply overriding whatever you find
8670 there. But since we don't even decide whether to create a
8671 block until after we've traversed its children, that's hard
8673 dwarf2_record_block_ranges (die, block, baseaddr, cu);
8675 local_symbols = new->locals;
8676 using_directives = new->using_directives;
8679 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
8682 read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu)
8684 struct objfile *objfile = cu->objfile;
8685 struct gdbarch *gdbarch = get_objfile_arch (objfile);
8686 CORE_ADDR pc, baseaddr;
8687 struct attribute *attr;
8688 struct call_site *call_site, call_site_local;
8691 struct die_info *child_die;
8693 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8695 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
8698 complaint (&symfile_complaints,
8699 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
8700 "DIE 0x%x [in module %s]"),
8701 die->offset.sect_off, objfile->name);
8704 pc = DW_ADDR (attr) + baseaddr;
8706 if (cu->call_site_htab == NULL)
8707 cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq,
8708 NULL, &objfile->objfile_obstack,
8709 hashtab_obstack_allocate, NULL);
8710 call_site_local.pc = pc;
8711 slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT);
8714 complaint (&symfile_complaints,
8715 _("Duplicate PC %s for DW_TAG_GNU_call_site "
8716 "DIE 0x%x [in module %s]"),
8717 paddress (gdbarch, pc), die->offset.sect_off, objfile->name);
8721 /* Count parameters at the caller. */
8724 for (child_die = die->child; child_die && child_die->tag;
8725 child_die = sibling_die (child_die))
8727 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
8729 complaint (&symfile_complaints,
8730 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
8731 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8732 child_die->tag, child_die->offset.sect_off, objfile->name);
8739 call_site = obstack_alloc (&objfile->objfile_obstack,
8740 (sizeof (*call_site)
8741 + (sizeof (*call_site->parameter)
8744 memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter));
8747 if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu))
8749 struct die_info *func_die;
8751 /* Skip also over DW_TAG_inlined_subroutine. */
8752 for (func_die = die->parent;
8753 func_die && func_die->tag != DW_TAG_subprogram
8754 && func_die->tag != DW_TAG_subroutine_type;
8755 func_die = func_die->parent);
8757 /* DW_AT_GNU_all_call_sites is a superset
8758 of DW_AT_GNU_all_tail_call_sites. */
8760 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu)
8761 && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu))
8763 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
8764 not complete. But keep CALL_SITE for look ups via call_site_htab,
8765 both the initial caller containing the real return address PC and
8766 the final callee containing the current PC of a chain of tail
8767 calls do not need to have the tail call list complete. But any
8768 function candidate for a virtual tail call frame searched via
8769 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
8770 determined unambiguously. */
8774 struct type *func_type = NULL;
8777 func_type = get_die_type (func_die, cu);
8778 if (func_type != NULL)
8780 gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC);
8782 /* Enlist this call site to the function. */
8783 call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type);
8784 TYPE_TAIL_CALL_LIST (func_type) = call_site;
8787 complaint (&symfile_complaints,
8788 _("Cannot find function owning DW_TAG_GNU_call_site "
8789 "DIE 0x%x [in module %s]"),
8790 die->offset.sect_off, objfile->name);
8794 attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu);
8796 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
8797 SET_FIELD_DWARF_BLOCK (call_site->target, NULL);
8798 if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0))
8799 /* Keep NULL DWARF_BLOCK. */;
8800 else if (attr_form_is_block (attr))
8802 struct dwarf2_locexpr_baton *dlbaton;
8804 dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton));
8805 dlbaton->data = DW_BLOCK (attr)->data;
8806 dlbaton->size = DW_BLOCK (attr)->size;
8807 dlbaton->per_cu = cu->per_cu;
8809 SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton);
8811 else if (is_ref_attr (attr))
8813 struct dwarf2_cu *target_cu = cu;
8814 struct die_info *target_die;
8816 target_die = follow_die_ref_or_sig (die, attr, &target_cu);
8817 gdb_assert (target_cu->objfile == objfile);
8818 if (die_is_declaration (target_die, target_cu))
8820 const char *target_physname;
8822 target_physname = dwarf2_physname (NULL, target_die, target_cu);
8823 if (target_physname == NULL)
8824 complaint (&symfile_complaints,
8825 _("DW_AT_GNU_call_site_target target DIE has invalid "
8826 "physname, for referencing DIE 0x%x [in module %s]"),
8827 die->offset.sect_off, objfile->name);
8829 SET_FIELD_PHYSNAME (call_site->target, (char *) target_physname);
8835 /* DW_AT_entry_pc should be preferred. */
8836 if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL))
8837 complaint (&symfile_complaints,
8838 _("DW_AT_GNU_call_site_target target DIE has invalid "
8839 "low pc, for referencing DIE 0x%x [in module %s]"),
8840 die->offset.sect_off, objfile->name);
8842 SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr);
8846 complaint (&symfile_complaints,
8847 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
8848 "block nor reference, for DIE 0x%x [in module %s]"),
8849 die->offset.sect_off, objfile->name);
8851 call_site->per_cu = cu->per_cu;
8853 for (child_die = die->child;
8854 child_die && child_die->tag;
8855 child_die = sibling_die (child_die))
8857 struct call_site_parameter *parameter;
8858 struct attribute *loc, *origin;
8860 if (child_die->tag != DW_TAG_GNU_call_site_parameter)
8862 /* Already printed the complaint above. */
8866 gdb_assert (call_site->parameter_count < nparams);
8867 parameter = &call_site->parameter[call_site->parameter_count];
8869 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
8870 specifies DW_TAG_formal_parameter. Value of the data assumed for the
8871 register is contained in DW_AT_GNU_call_site_value. */
8873 loc = dwarf2_attr (child_die, DW_AT_location, cu);
8874 origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
8875 if (loc == NULL && origin != NULL && is_ref_attr (origin))
8879 parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET;
8880 offset = dwarf2_get_ref_die_offset (origin);
8881 if (!offset_in_cu_p (&cu->header, offset))
8883 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
8884 binding can be done only inside one CU. Such referenced DIE
8885 therefore cannot be even moved to DW_TAG_partial_unit. */
8886 complaint (&symfile_complaints,
8887 _("DW_AT_abstract_origin offset is not in CU for "
8888 "DW_TAG_GNU_call_site child DIE 0x%x "
8890 child_die->offset.sect_off, objfile->name);
8893 parameter->u.param_offset.cu_off = (offset.sect_off
8894 - cu->header.offset.sect_off);
8896 else if (loc == NULL || origin != NULL || !attr_form_is_block (loc))
8898 complaint (&symfile_complaints,
8899 _("No DW_FORM_block* DW_AT_location for "
8900 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8901 child_die->offset.sect_off, objfile->name);
8906 parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg
8907 (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]);
8908 if (parameter->u.dwarf_reg != -1)
8909 parameter->kind = CALL_SITE_PARAMETER_DWARF_REG;
8910 else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data,
8911 &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size],
8912 ¶meter->u.fb_offset))
8913 parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET;
8916 complaint (&symfile_complaints,
8917 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
8918 "for DW_FORM_block* DW_AT_location is supported for "
8919 "DW_TAG_GNU_call_site child DIE 0x%x "
8921 child_die->offset.sect_off, objfile->name);
8926 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu);
8927 if (!attr_form_is_block (attr))
8929 complaint (&symfile_complaints,
8930 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
8931 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8932 child_die->offset.sect_off, objfile->name);
8935 parameter->value = DW_BLOCK (attr)->data;
8936 parameter->value_size = DW_BLOCK (attr)->size;
8938 /* Parameters are not pre-cleared by memset above. */
8939 parameter->data_value = NULL;
8940 parameter->data_value_size = 0;
8941 call_site->parameter_count++;
8943 attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu);
8946 if (!attr_form_is_block (attr))
8947 complaint (&symfile_complaints,
8948 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
8949 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8950 child_die->offset.sect_off, objfile->name);
8953 parameter->data_value = DW_BLOCK (attr)->data;
8954 parameter->data_value_size = DW_BLOCK (attr)->size;
8960 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
8961 Return 1 if the attributes are present and valid, otherwise, return 0.
8962 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
8965 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
8966 CORE_ADDR *high_return, struct dwarf2_cu *cu,
8967 struct partial_symtab *ranges_pst)
8969 struct objfile *objfile = cu->objfile;
8970 struct comp_unit_head *cu_header = &cu->header;
8971 bfd *obfd = objfile->obfd;
8972 unsigned int addr_size = cu_header->addr_size;
8973 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
8974 /* Base address selection entry. */
8985 found_base = cu->base_known;
8986 base = cu->base_address;
8988 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
8989 if (offset >= dwarf2_per_objfile->ranges.size)
8991 complaint (&symfile_complaints,
8992 _("Offset %d out of bounds for DW_AT_ranges attribute"),
8996 buffer = dwarf2_per_objfile->ranges.buffer + offset;
8998 /* Read in the largest possible address. */
8999 marker = read_address (obfd, buffer, cu, &dummy);
9000 if ((marker & mask) == mask)
9002 /* If we found the largest possible address, then
9003 read the base address. */
9004 base = read_address (obfd, buffer + addr_size, cu, &dummy);
9005 buffer += 2 * addr_size;
9006 offset += 2 * addr_size;
9012 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
9016 CORE_ADDR range_beginning, range_end;
9018 range_beginning = read_address (obfd, buffer, cu, &dummy);
9019 buffer += addr_size;
9020 range_end = read_address (obfd, buffer, cu, &dummy);
9021 buffer += addr_size;
9022 offset += 2 * addr_size;
9024 /* An end of list marker is a pair of zero addresses. */
9025 if (range_beginning == 0 && range_end == 0)
9026 /* Found the end of list entry. */
9029 /* Each base address selection entry is a pair of 2 values.
9030 The first is the largest possible address, the second is
9031 the base address. Check for a base address here. */
9032 if ((range_beginning & mask) == mask)
9034 /* If we found the largest possible address, then
9035 read the base address. */
9036 base = read_address (obfd, buffer + addr_size, cu, &dummy);
9043 /* We have no valid base address for the ranges
9045 complaint (&symfile_complaints,
9046 _("Invalid .debug_ranges data (no base address)"));
9050 if (range_beginning > range_end)
9052 /* Inverted range entries are invalid. */
9053 complaint (&symfile_complaints,
9054 _("Invalid .debug_ranges data (inverted range)"));
9058 /* Empty range entries have no effect. */
9059 if (range_beginning == range_end)
9062 range_beginning += base;
9065 if (ranges_pst != NULL)
9066 addrmap_set_empty (objfile->psymtabs_addrmap,
9067 range_beginning + baseaddr,
9068 range_end - 1 + baseaddr,
9071 /* FIXME: This is recording everything as a low-high
9072 segment of consecutive addresses. We should have a
9073 data structure for discontiguous block ranges
9077 low = range_beginning;
9083 if (range_beginning < low)
9084 low = range_beginning;
9085 if (range_end > high)
9091 /* If the first entry is an end-of-list marker, the range
9092 describes an empty scope, i.e. no instructions. */
9098 *high_return = high;
9102 /* Get low and high pc attributes from a die. Return 1 if the attributes
9103 are present and valid, otherwise, return 0. Return -1 if the range is
9104 discontinuous, i.e. derived from DW_AT_ranges information. */
9107 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
9108 CORE_ADDR *highpc, struct dwarf2_cu *cu,
9109 struct partial_symtab *pst)
9111 struct attribute *attr;
9112 struct attribute *attr_high;
9117 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
9120 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
9123 low = DW_ADDR (attr);
9124 if (attr_high->form == DW_FORM_addr
9125 || attr_high->form == DW_FORM_GNU_addr_index)
9126 high = DW_ADDR (attr_high);
9128 high = low + DW_UNSND (attr_high);
9131 /* Found high w/o low attribute. */
9134 /* Found consecutive range of addresses. */
9139 attr = dwarf2_attr (die, DW_AT_ranges, cu);
9142 unsigned int ranges_offset = DW_UNSND (attr) + cu->ranges_base;
9144 /* Value of the DW_AT_ranges attribute is the offset in the
9145 .debug_ranges section. */
9146 if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst))
9148 /* Found discontinuous range of addresses. */
9153 /* read_partial_die has also the strict LOW < HIGH requirement. */
9157 /* When using the GNU linker, .gnu.linkonce. sections are used to
9158 eliminate duplicate copies of functions and vtables and such.
9159 The linker will arbitrarily choose one and discard the others.
9160 The AT_*_pc values for such functions refer to local labels in
9161 these sections. If the section from that file was discarded, the
9162 labels are not in the output, so the relocs get a value of 0.
9163 If this is a discarded function, mark the pc bounds as invalid,
9164 so that GDB will ignore it. */
9165 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
9174 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
9175 its low and high PC addresses. Do nothing if these addresses could not
9176 be determined. Otherwise, set LOWPC to the low address if it is smaller,
9177 and HIGHPC to the high address if greater than HIGHPC. */
9180 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
9181 CORE_ADDR *lowpc, CORE_ADDR *highpc,
9182 struct dwarf2_cu *cu)
9184 CORE_ADDR low, high;
9185 struct die_info *child = die->child;
9187 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
9189 *lowpc = min (*lowpc, low);
9190 *highpc = max (*highpc, high);
9193 /* If the language does not allow nested subprograms (either inside
9194 subprograms or lexical blocks), we're done. */
9195 if (cu->language != language_ada)
9198 /* Check all the children of the given DIE. If it contains nested
9199 subprograms, then check their pc bounds. Likewise, we need to
9200 check lexical blocks as well, as they may also contain subprogram
9202 while (child && child->tag)
9204 if (child->tag == DW_TAG_subprogram
9205 || child->tag == DW_TAG_lexical_block)
9206 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
9207 child = sibling_die (child);
9211 /* Get the low and high pc's represented by the scope DIE, and store
9212 them in *LOWPC and *HIGHPC. If the correct values can't be
9213 determined, set *LOWPC to -1 and *HIGHPC to 0. */
9216 get_scope_pc_bounds (struct die_info *die,
9217 CORE_ADDR *lowpc, CORE_ADDR *highpc,
9218 struct dwarf2_cu *cu)
9220 CORE_ADDR best_low = (CORE_ADDR) -1;
9221 CORE_ADDR best_high = (CORE_ADDR) 0;
9222 CORE_ADDR current_low, current_high;
9224 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
9226 best_low = current_low;
9227 best_high = current_high;
9231 struct die_info *child = die->child;
9233 while (child && child->tag)
9235 switch (child->tag) {
9236 case DW_TAG_subprogram:
9237 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
9239 case DW_TAG_namespace:
9241 /* FIXME: carlton/2004-01-16: Should we do this for
9242 DW_TAG_class_type/DW_TAG_structure_type, too? I think
9243 that current GCC's always emit the DIEs corresponding
9244 to definitions of methods of classes as children of a
9245 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
9246 the DIEs giving the declarations, which could be
9247 anywhere). But I don't see any reason why the
9248 standards says that they have to be there. */
9249 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
9251 if (current_low != ((CORE_ADDR) -1))
9253 best_low = min (best_low, current_low);
9254 best_high = max (best_high, current_high);
9262 child = sibling_die (child);
9267 *highpc = best_high;
9270 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
9274 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
9275 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
9277 struct objfile *objfile = cu->objfile;
9278 struct attribute *attr;
9279 struct attribute *attr_high;
9281 attr_high = dwarf2_attr (die, DW_AT_high_pc, cu);
9284 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
9287 CORE_ADDR low = DW_ADDR (attr);
9289 if (attr_high->form == DW_FORM_addr
9290 || attr_high->form == DW_FORM_GNU_addr_index)
9291 high = DW_ADDR (attr_high);
9293 high = low + DW_UNSND (attr_high);
9295 record_block_range (block, baseaddr + low, baseaddr + high - 1);
9299 attr = dwarf2_attr (die, DW_AT_ranges, cu);
9302 bfd *obfd = objfile->obfd;
9304 /* The value of the DW_AT_ranges attribute is the offset of the
9305 address range list in the .debug_ranges section. */
9306 unsigned long offset = DW_UNSND (attr) + cu->ranges_base;
9307 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
9309 /* For some target architectures, but not others, the
9310 read_address function sign-extends the addresses it returns.
9311 To recognize base address selection entries, we need a
9313 unsigned int addr_size = cu->header.addr_size;
9314 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
9316 /* The base address, to which the next pair is relative. Note
9317 that this 'base' is a DWARF concept: most entries in a range
9318 list are relative, to reduce the number of relocs against the
9319 debugging information. This is separate from this function's
9320 'baseaddr' argument, which GDB uses to relocate debugging
9321 information from a shared library based on the address at
9322 which the library was loaded. */
9323 CORE_ADDR base = cu->base_address;
9324 int base_known = cu->base_known;
9326 gdb_assert (dwarf2_per_objfile->ranges.readin);
9327 if (offset >= dwarf2_per_objfile->ranges.size)
9329 complaint (&symfile_complaints,
9330 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
9337 unsigned int bytes_read;
9338 CORE_ADDR start, end;
9340 start = read_address (obfd, buffer, cu, &bytes_read);
9341 buffer += bytes_read;
9342 end = read_address (obfd, buffer, cu, &bytes_read);
9343 buffer += bytes_read;
9345 /* Did we find the end of the range list? */
9346 if (start == 0 && end == 0)
9349 /* Did we find a base address selection entry? */
9350 else if ((start & base_select_mask) == base_select_mask)
9356 /* We found an ordinary address range. */
9361 complaint (&symfile_complaints,
9362 _("Invalid .debug_ranges data "
9363 "(no base address)"));
9369 /* Inverted range entries are invalid. */
9370 complaint (&symfile_complaints,
9371 _("Invalid .debug_ranges data "
9372 "(inverted range)"));
9376 /* Empty range entries have no effect. */
9380 record_block_range (block,
9381 baseaddr + base + start,
9382 baseaddr + base + end - 1);
9388 /* Check whether the producer field indicates either of GCC < 4.6, or the
9389 Intel C/C++ compiler, and cache the result in CU. */
9392 check_producer (struct dwarf2_cu *cu)
9395 int major, minor, release;
9397 if (cu->producer == NULL)
9399 /* For unknown compilers expect their behavior is DWARF version
9402 GCC started to support .debug_types sections by -gdwarf-4 since
9403 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
9404 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
9405 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
9406 interpreted incorrectly by GDB now - GCC PR debug/48229. */
9408 else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0)
9410 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
9412 cs = &cu->producer[strlen ("GNU ")];
9413 while (*cs && !isdigit (*cs))
9415 if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3)
9417 /* Not recognized as GCC. */
9420 cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6);
9422 else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0)
9423 cu->producer_is_icc = 1;
9426 /* For other non-GCC compilers, expect their behavior is DWARF version
9430 cu->checked_producer = 1;
9433 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
9434 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
9435 during 4.6.0 experimental. */
9438 producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu)
9440 if (!cu->checked_producer)
9441 check_producer (cu);
9443 return cu->producer_is_gxx_lt_4_6;
9446 /* Return the default accessibility type if it is not overriden by
9447 DW_AT_accessibility. */
9449 static enum dwarf_access_attribute
9450 dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu)
9452 if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu))
9454 /* The default DWARF 2 accessibility for members is public, the default
9455 accessibility for inheritance is private. */
9457 if (die->tag != DW_TAG_inheritance)
9458 return DW_ACCESS_public;
9460 return DW_ACCESS_private;
9464 /* DWARF 3+ defines the default accessibility a different way. The same
9465 rules apply now for DW_TAG_inheritance as for the members and it only
9466 depends on the container kind. */
9468 if (die->parent->tag == DW_TAG_class_type)
9469 return DW_ACCESS_private;
9471 return DW_ACCESS_public;
9475 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
9476 offset. If the attribute was not found return 0, otherwise return
9477 1. If it was found but could not properly be handled, set *OFFSET
9481 handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu,
9484 struct attribute *attr;
9486 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
9491 /* Note that we do not check for a section offset first here.
9492 This is because DW_AT_data_member_location is new in DWARF 4,
9493 so if we see it, we can assume that a constant form is really
9494 a constant and not a section offset. */
9495 if (attr_form_is_constant (attr))
9496 *offset = dwarf2_get_attr_constant_value (attr, 0);
9497 else if (attr_form_is_section_offset (attr))
9498 dwarf2_complex_location_expr_complaint ();
9499 else if (attr_form_is_block (attr))
9500 *offset = decode_locdesc (DW_BLOCK (attr), cu);
9502 dwarf2_complex_location_expr_complaint ();
9510 /* Add an aggregate field to the field list. */
9513 dwarf2_add_field (struct field_info *fip, struct die_info *die,
9514 struct dwarf2_cu *cu)
9516 struct objfile *objfile = cu->objfile;
9517 struct gdbarch *gdbarch = get_objfile_arch (objfile);
9518 struct nextfield *new_field;
9519 struct attribute *attr;
9521 char *fieldname = "";
9523 /* Allocate a new field list entry and link it in. */
9524 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
9525 make_cleanup (xfree, new_field);
9526 memset (new_field, 0, sizeof (struct nextfield));
9528 if (die->tag == DW_TAG_inheritance)
9530 new_field->next = fip->baseclasses;
9531 fip->baseclasses = new_field;
9535 new_field->next = fip->fields;
9536 fip->fields = new_field;
9540 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
9542 new_field->accessibility = DW_UNSND (attr);
9544 new_field->accessibility = dwarf2_default_access_attribute (die, cu);
9545 if (new_field->accessibility != DW_ACCESS_public)
9546 fip->non_public_fields = 1;
9548 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
9550 new_field->virtuality = DW_UNSND (attr);
9552 new_field->virtuality = DW_VIRTUALITY_none;
9554 fp = &new_field->field;
9556 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
9560 /* Data member other than a C++ static data member. */
9562 /* Get type of field. */
9563 fp->type = die_type (die, cu);
9565 SET_FIELD_BITPOS (*fp, 0);
9567 /* Get bit size of field (zero if none). */
9568 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
9571 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
9575 FIELD_BITSIZE (*fp) = 0;
9578 /* Get bit offset of field. */
9579 if (handle_data_member_location (die, cu, &offset))
9580 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
9581 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
9584 if (gdbarch_bits_big_endian (gdbarch))
9586 /* For big endian bits, the DW_AT_bit_offset gives the
9587 additional bit offset from the MSB of the containing
9588 anonymous object to the MSB of the field. We don't
9589 have to do anything special since we don't need to
9590 know the size of the anonymous object. */
9591 SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr));
9595 /* For little endian bits, compute the bit offset to the
9596 MSB of the anonymous object, subtract off the number of
9597 bits from the MSB of the field to the MSB of the
9598 object, and then subtract off the number of bits of
9599 the field itself. The result is the bit offset of
9600 the LSB of the field. */
9602 int bit_offset = DW_UNSND (attr);
9604 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
9607 /* The size of the anonymous object containing
9608 the bit field is explicit, so use the
9609 indicated size (in bytes). */
9610 anonymous_size = DW_UNSND (attr);
9614 /* The size of the anonymous object containing
9615 the bit field must be inferred from the type
9616 attribute of the data member containing the
9618 anonymous_size = TYPE_LENGTH (fp->type);
9620 SET_FIELD_BITPOS (*fp,
9622 + anonymous_size * bits_per_byte
9623 - bit_offset - FIELD_BITSIZE (*fp)));
9627 /* Get name of field. */
9628 fieldname = dwarf2_name (die, cu);
9629 if (fieldname == NULL)
9632 /* The name is already allocated along with this objfile, so we don't
9633 need to duplicate it for the type. */
9634 fp->name = fieldname;
9636 /* Change accessibility for artificial fields (e.g. virtual table
9637 pointer or virtual base class pointer) to private. */
9638 if (dwarf2_attr (die, DW_AT_artificial, cu))
9640 FIELD_ARTIFICIAL (*fp) = 1;
9641 new_field->accessibility = DW_ACCESS_private;
9642 fip->non_public_fields = 1;
9645 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
9647 /* C++ static member. */
9649 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
9650 is a declaration, but all versions of G++ as of this writing
9651 (so through at least 3.2.1) incorrectly generate
9652 DW_TAG_variable tags. */
9654 const char *physname;
9656 /* Get name of field. */
9657 fieldname = dwarf2_name (die, cu);
9658 if (fieldname == NULL)
9661 attr = dwarf2_attr (die, DW_AT_const_value, cu);
9663 /* Only create a symbol if this is an external value.
9664 new_symbol checks this and puts the value in the global symbol
9665 table, which we want. If it is not external, new_symbol
9666 will try to put the value in cu->list_in_scope which is wrong. */
9667 && dwarf2_flag_true_p (die, DW_AT_external, cu))
9669 /* A static const member, not much different than an enum as far as
9670 we're concerned, except that we can support more types. */
9671 new_symbol (die, NULL, cu);
9674 /* Get physical name. */
9675 physname = dwarf2_physname (fieldname, die, cu);
9677 /* The name is already allocated along with this objfile, so we don't
9678 need to duplicate it for the type. */
9679 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
9680 FIELD_TYPE (*fp) = die_type (die, cu);
9681 FIELD_NAME (*fp) = fieldname;
9683 else if (die->tag == DW_TAG_inheritance)
9687 /* C++ base class field. */
9688 if (handle_data_member_location (die, cu, &offset))
9689 SET_FIELD_BITPOS (*fp, offset * bits_per_byte);
9690 FIELD_BITSIZE (*fp) = 0;
9691 FIELD_TYPE (*fp) = die_type (die, cu);
9692 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
9693 fip->nbaseclasses++;
9697 /* Add a typedef defined in the scope of the FIP's class. */
9700 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
9701 struct dwarf2_cu *cu)
9703 struct objfile *objfile = cu->objfile;
9704 struct typedef_field_list *new_field;
9705 struct attribute *attr;
9706 struct typedef_field *fp;
9707 char *fieldname = "";
9709 /* Allocate a new field list entry and link it in. */
9710 new_field = xzalloc (sizeof (*new_field));
9711 make_cleanup (xfree, new_field);
9713 gdb_assert (die->tag == DW_TAG_typedef);
9715 fp = &new_field->field;
9717 /* Get name of field. */
9718 fp->name = dwarf2_name (die, cu);
9719 if (fp->name == NULL)
9722 fp->type = read_type_die (die, cu);
9724 new_field->next = fip->typedef_field_list;
9725 fip->typedef_field_list = new_field;
9726 fip->typedef_field_list_count++;
9729 /* Create the vector of fields, and attach it to the type. */
9732 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
9733 struct dwarf2_cu *cu)
9735 int nfields = fip->nfields;
9737 /* Record the field count, allocate space for the array of fields,
9738 and create blank accessibility bitfields if necessary. */
9739 TYPE_NFIELDS (type) = nfields;
9740 TYPE_FIELDS (type) = (struct field *)
9741 TYPE_ALLOC (type, sizeof (struct field) * nfields);
9742 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
9744 if (fip->non_public_fields && cu->language != language_ada)
9746 ALLOCATE_CPLUS_STRUCT_TYPE (type);
9748 TYPE_FIELD_PRIVATE_BITS (type) =
9749 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
9750 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
9752 TYPE_FIELD_PROTECTED_BITS (type) =
9753 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
9754 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
9756 TYPE_FIELD_IGNORE_BITS (type) =
9757 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
9758 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
9761 /* If the type has baseclasses, allocate and clear a bit vector for
9762 TYPE_FIELD_VIRTUAL_BITS. */
9763 if (fip->nbaseclasses && cu->language != language_ada)
9765 int num_bytes = B_BYTES (fip->nbaseclasses);
9766 unsigned char *pointer;
9768 ALLOCATE_CPLUS_STRUCT_TYPE (type);
9769 pointer = TYPE_ALLOC (type, num_bytes);
9770 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
9771 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
9772 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
9775 /* Copy the saved-up fields into the field vector. Start from the head of
9776 the list, adding to the tail of the field array, so that they end up in
9777 the same order in the array in which they were added to the list. */
9778 while (nfields-- > 0)
9780 struct nextfield *fieldp;
9784 fieldp = fip->fields;
9785 fip->fields = fieldp->next;
9789 fieldp = fip->baseclasses;
9790 fip->baseclasses = fieldp->next;
9793 TYPE_FIELD (type, nfields) = fieldp->field;
9794 switch (fieldp->accessibility)
9796 case DW_ACCESS_private:
9797 if (cu->language != language_ada)
9798 SET_TYPE_FIELD_PRIVATE (type, nfields);
9801 case DW_ACCESS_protected:
9802 if (cu->language != language_ada)
9803 SET_TYPE_FIELD_PROTECTED (type, nfields);
9806 case DW_ACCESS_public:
9810 /* Unknown accessibility. Complain and treat it as public. */
9812 complaint (&symfile_complaints, _("unsupported accessibility %d"),
9813 fieldp->accessibility);
9817 if (nfields < fip->nbaseclasses)
9819 switch (fieldp->virtuality)
9821 case DW_VIRTUALITY_virtual:
9822 case DW_VIRTUALITY_pure_virtual:
9823 if (cu->language == language_ada)
9824 error (_("unexpected virtuality in component of Ada type"));
9825 SET_TYPE_FIELD_VIRTUAL (type, nfields);
9832 /* Add a member function to the proper fieldlist. */
9835 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
9836 struct type *type, struct dwarf2_cu *cu)
9838 struct objfile *objfile = cu->objfile;
9839 struct attribute *attr;
9840 struct fnfieldlist *flp;
9842 struct fn_field *fnp;
9844 struct nextfnfield *new_fnfield;
9845 struct type *this_type;
9846 enum dwarf_access_attribute accessibility;
9848 if (cu->language == language_ada)
9849 error (_("unexpected member function in Ada type"));
9851 /* Get name of member function. */
9852 fieldname = dwarf2_name (die, cu);
9853 if (fieldname == NULL)
9856 /* Look up member function name in fieldlist. */
9857 for (i = 0; i < fip->nfnfields; i++)
9859 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
9863 /* Create new list element if necessary. */
9864 if (i < fip->nfnfields)
9865 flp = &fip->fnfieldlists[i];
9868 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
9870 fip->fnfieldlists = (struct fnfieldlist *)
9871 xrealloc (fip->fnfieldlists,
9872 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
9873 * sizeof (struct fnfieldlist));
9874 if (fip->nfnfields == 0)
9875 make_cleanup (free_current_contents, &fip->fnfieldlists);
9877 flp = &fip->fnfieldlists[fip->nfnfields];
9878 flp->name = fieldname;
9881 i = fip->nfnfields++;
9884 /* Create a new member function field and chain it to the field list
9886 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
9887 make_cleanup (xfree, new_fnfield);
9888 memset (new_fnfield, 0, sizeof (struct nextfnfield));
9889 new_fnfield->next = flp->head;
9890 flp->head = new_fnfield;
9893 /* Fill in the member function field info. */
9894 fnp = &new_fnfield->fnfield;
9896 /* Delay processing of the physname until later. */
9897 if (cu->language == language_cplus || cu->language == language_java)
9899 add_to_method_list (type, i, flp->length - 1, fieldname,
9904 const char *physname = dwarf2_physname (fieldname, die, cu);
9905 fnp->physname = physname ? physname : "";
9908 fnp->type = alloc_type (objfile);
9909 this_type = read_type_die (die, cu);
9910 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
9912 int nparams = TYPE_NFIELDS (this_type);
9914 /* TYPE is the domain of this method, and THIS_TYPE is the type
9915 of the method itself (TYPE_CODE_METHOD). */
9916 smash_to_method_type (fnp->type, type,
9917 TYPE_TARGET_TYPE (this_type),
9918 TYPE_FIELDS (this_type),
9919 TYPE_NFIELDS (this_type),
9920 TYPE_VARARGS (this_type));
9922 /* Handle static member functions.
9923 Dwarf2 has no clean way to discern C++ static and non-static
9924 member functions. G++ helps GDB by marking the first
9925 parameter for non-static member functions (which is the this
9926 pointer) as artificial. We obtain this information from
9927 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
9928 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
9929 fnp->voffset = VOFFSET_STATIC;
9932 complaint (&symfile_complaints, _("member function type missing for '%s'"),
9933 dwarf2_full_name (fieldname, die, cu));
9935 /* Get fcontext from DW_AT_containing_type if present. */
9936 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
9937 fnp->fcontext = die_containing_type (die, cu);
9939 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
9940 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
9942 /* Get accessibility. */
9943 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
9945 accessibility = DW_UNSND (attr);
9947 accessibility = dwarf2_default_access_attribute (die, cu);
9948 switch (accessibility)
9950 case DW_ACCESS_private:
9951 fnp->is_private = 1;
9953 case DW_ACCESS_protected:
9954 fnp->is_protected = 1;
9958 /* Check for artificial methods. */
9959 attr = dwarf2_attr (die, DW_AT_artificial, cu);
9960 if (attr && DW_UNSND (attr) != 0)
9961 fnp->is_artificial = 1;
9963 /* Get index in virtual function table if it is a virtual member
9964 function. For older versions of GCC, this is an offset in the
9965 appropriate virtual table, as specified by DW_AT_containing_type.
9966 For everyone else, it is an expression to be evaluated relative
9967 to the object address. */
9969 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
9972 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0)
9974 if (DW_BLOCK (attr)->data[0] == DW_OP_constu)
9976 /* Old-style GCC. */
9977 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
9979 else if (DW_BLOCK (attr)->data[0] == DW_OP_deref
9980 || (DW_BLOCK (attr)->size > 1
9981 && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
9982 && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
9984 struct dwarf_block blk;
9987 offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
9989 blk.size = DW_BLOCK (attr)->size - offset;
9990 blk.data = DW_BLOCK (attr)->data + offset;
9991 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
9992 if ((fnp->voffset % cu->header.addr_size) != 0)
9993 dwarf2_complex_location_expr_complaint ();
9995 fnp->voffset /= cu->header.addr_size;
9999 dwarf2_complex_location_expr_complaint ();
10001 if (!fnp->fcontext)
10002 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
10004 else if (attr_form_is_section_offset (attr))
10006 dwarf2_complex_location_expr_complaint ();
10010 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
10016 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
10017 if (attr && DW_UNSND (attr))
10019 /* GCC does this, as of 2008-08-25; PR debug/37237. */
10020 complaint (&symfile_complaints,
10021 _("Member function \"%s\" (offset %d) is virtual "
10022 "but the vtable offset is not specified"),
10023 fieldname, die->offset.sect_off);
10024 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10025 TYPE_CPLUS_DYNAMIC (type) = 1;
10030 /* Create the vector of member function fields, and attach it to the type. */
10033 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
10034 struct dwarf2_cu *cu)
10036 struct fnfieldlist *flp;
10039 if (cu->language == language_ada)
10040 error (_("unexpected member functions in Ada type"));
10042 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10043 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
10044 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
10046 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
10048 struct nextfnfield *nfp = flp->head;
10049 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
10052 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
10053 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
10054 fn_flp->fn_fields = (struct fn_field *)
10055 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
10056 for (k = flp->length; (k--, nfp); nfp = nfp->next)
10057 fn_flp->fn_fields[k] = nfp->fnfield;
10060 TYPE_NFN_FIELDS (type) = fip->nfnfields;
10063 /* Returns non-zero if NAME is the name of a vtable member in CU's
10064 language, zero otherwise. */
10066 is_vtable_name (const char *name, struct dwarf2_cu *cu)
10068 static const char vptr[] = "_vptr";
10069 static const char vtable[] = "vtable";
10071 /* Look for the C++ and Java forms of the vtable. */
10072 if ((cu->language == language_java
10073 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
10074 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
10075 && is_cplus_marker (name[sizeof (vptr) - 1])))
10081 /* GCC outputs unnamed structures that are really pointers to member
10082 functions, with the ABI-specified layout. If TYPE describes
10083 such a structure, smash it into a member function type.
10085 GCC shouldn't do this; it should just output pointer to member DIEs.
10086 This is GCC PR debug/28767. */
10089 quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile)
10091 struct type *pfn_type, *domain_type, *new_type;
10093 /* Check for a structure with no name and two children. */
10094 if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2)
10097 /* Check for __pfn and __delta members. */
10098 if (TYPE_FIELD_NAME (type, 0) == NULL
10099 || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0
10100 || TYPE_FIELD_NAME (type, 1) == NULL
10101 || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0)
10104 /* Find the type of the method. */
10105 pfn_type = TYPE_FIELD_TYPE (type, 0);
10106 if (pfn_type == NULL
10107 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
10108 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
10111 /* Look for the "this" argument. */
10112 pfn_type = TYPE_TARGET_TYPE (pfn_type);
10113 if (TYPE_NFIELDS (pfn_type) == 0
10114 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
10115 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
10118 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
10119 new_type = alloc_type (objfile);
10120 smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type),
10121 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
10122 TYPE_VARARGS (pfn_type));
10123 smash_to_methodptr_type (type, new_type);
10126 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
10130 producer_is_icc (struct dwarf2_cu *cu)
10132 if (!cu->checked_producer)
10133 check_producer (cu);
10135 return cu->producer_is_icc;
10138 /* Called when we find the DIE that starts a structure or union scope
10139 (definition) to create a type for the structure or union. Fill in
10140 the type's name and general properties; the members will not be
10141 processed until process_structure_type.
10143 NOTE: we need to call these functions regardless of whether or not the
10144 DIE has a DW_AT_name attribute, since it might be an anonymous
10145 structure or union. This gets the type entered into our set of
10146 user defined types.
10148 However, if the structure is incomplete (an opaque struct/union)
10149 then suppress creating a symbol table entry for it since gdb only
10150 wants to find the one with the complete definition. Note that if
10151 it is complete, we just call new_symbol, which does it's own
10152 checking about whether the struct/union is anonymous or not (and
10153 suppresses creating a symbol table entry itself). */
10155 static struct type *
10156 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
10158 struct objfile *objfile = cu->objfile;
10160 struct attribute *attr;
10163 /* If the definition of this type lives in .debug_types, read that type.
10164 Don't follow DW_AT_specification though, that will take us back up
10165 the chain and we want to go down. */
10166 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
10169 struct dwarf2_cu *type_cu = cu;
10170 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
10172 /* We could just recurse on read_structure_type, but we need to call
10173 get_die_type to ensure only one type for this DIE is created.
10174 This is important, for example, because for c++ classes we need
10175 TYPE_NAME set which is only done by new_symbol. Blech. */
10176 type = read_type_die (type_die, type_cu);
10178 /* TYPE_CU may not be the same as CU.
10179 Ensure TYPE is recorded in CU's type_hash table. */
10180 return set_die_type (die, type, cu);
10183 type = alloc_type (objfile);
10184 INIT_CPLUS_SPECIFIC (type);
10186 name = dwarf2_name (die, cu);
10189 if (cu->language == language_cplus
10190 || cu->language == language_java)
10192 char *full_name = (char *) dwarf2_full_name (name, die, cu);
10194 /* dwarf2_full_name might have already finished building the DIE's
10195 type. If so, there is no need to continue. */
10196 if (get_die_type (die, cu) != NULL)
10197 return get_die_type (die, cu);
10199 TYPE_TAG_NAME (type) = full_name;
10200 if (die->tag == DW_TAG_structure_type
10201 || die->tag == DW_TAG_class_type)
10202 TYPE_NAME (type) = TYPE_TAG_NAME (type);
10206 /* The name is already allocated along with this objfile, so
10207 we don't need to duplicate it for the type. */
10208 TYPE_TAG_NAME (type) = (char *) name;
10209 if (die->tag == DW_TAG_class_type)
10210 TYPE_NAME (type) = TYPE_TAG_NAME (type);
10214 if (die->tag == DW_TAG_structure_type)
10216 TYPE_CODE (type) = TYPE_CODE_STRUCT;
10218 else if (die->tag == DW_TAG_union_type)
10220 TYPE_CODE (type) = TYPE_CODE_UNION;
10224 TYPE_CODE (type) = TYPE_CODE_CLASS;
10227 if (cu->language == language_cplus && die->tag == DW_TAG_class_type)
10228 TYPE_DECLARED_CLASS (type) = 1;
10230 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
10233 TYPE_LENGTH (type) = DW_UNSND (attr);
10237 TYPE_LENGTH (type) = 0;
10240 if (producer_is_icc (cu))
10242 /* ICC does not output the required DW_AT_declaration
10243 on incomplete types, but gives them a size of zero. */
10246 TYPE_STUB_SUPPORTED (type) = 1;
10248 if (die_is_declaration (die, cu))
10249 TYPE_STUB (type) = 1;
10250 else if (attr == NULL && die->child == NULL
10251 && producer_is_realview (cu->producer))
10252 /* RealView does not output the required DW_AT_declaration
10253 on incomplete types. */
10254 TYPE_STUB (type) = 1;
10256 /* We need to add the type field to the die immediately so we don't
10257 infinitely recurse when dealing with pointers to the structure
10258 type within the structure itself. */
10259 set_die_type (die, type, cu);
10261 /* set_die_type should be already done. */
10262 set_descriptive_type (type, die, cu);
10267 /* Finish creating a structure or union type, including filling in
10268 its members and creating a symbol for it. */
10271 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
10273 struct objfile *objfile = cu->objfile;
10274 struct die_info *child_die = die->child;
10277 type = get_die_type (die, cu);
10279 type = read_structure_type (die, cu);
10281 if (die->child != NULL && ! die_is_declaration (die, cu))
10283 struct field_info fi;
10284 struct die_info *child_die;
10285 VEC (symbolp) *template_args = NULL;
10286 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
10288 memset (&fi, 0, sizeof (struct field_info));
10290 child_die = die->child;
10292 while (child_die && child_die->tag)
10294 if (child_die->tag == DW_TAG_member
10295 || child_die->tag == DW_TAG_variable)
10297 /* NOTE: carlton/2002-11-05: A C++ static data member
10298 should be a DW_TAG_member that is a declaration, but
10299 all versions of G++ as of this writing (so through at
10300 least 3.2.1) incorrectly generate DW_TAG_variable
10301 tags for them instead. */
10302 dwarf2_add_field (&fi, child_die, cu);
10304 else if (child_die->tag == DW_TAG_subprogram)
10306 /* C++ member function. */
10307 dwarf2_add_member_fn (&fi, child_die, type, cu);
10309 else if (child_die->tag == DW_TAG_inheritance)
10311 /* C++ base class field. */
10312 dwarf2_add_field (&fi, child_die, cu);
10314 else if (child_die->tag == DW_TAG_typedef)
10315 dwarf2_add_typedef (&fi, child_die, cu);
10316 else if (child_die->tag == DW_TAG_template_type_param
10317 || child_die->tag == DW_TAG_template_value_param)
10319 struct symbol *arg = new_symbol (child_die, NULL, cu);
10322 VEC_safe_push (symbolp, template_args, arg);
10325 child_die = sibling_die (child_die);
10328 /* Attach template arguments to type. */
10329 if (! VEC_empty (symbolp, template_args))
10331 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10332 TYPE_N_TEMPLATE_ARGUMENTS (type)
10333 = VEC_length (symbolp, template_args);
10334 TYPE_TEMPLATE_ARGUMENTS (type)
10335 = obstack_alloc (&objfile->objfile_obstack,
10336 (TYPE_N_TEMPLATE_ARGUMENTS (type)
10337 * sizeof (struct symbol *)));
10338 memcpy (TYPE_TEMPLATE_ARGUMENTS (type),
10339 VEC_address (symbolp, template_args),
10340 (TYPE_N_TEMPLATE_ARGUMENTS (type)
10341 * sizeof (struct symbol *)));
10342 VEC_free (symbolp, template_args);
10345 /* Attach fields and member functions to the type. */
10347 dwarf2_attach_fields_to_type (&fi, type, cu);
10350 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
10352 /* Get the type which refers to the base class (possibly this
10353 class itself) which contains the vtable pointer for the current
10354 class from the DW_AT_containing_type attribute. This use of
10355 DW_AT_containing_type is a GNU extension. */
10357 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
10359 struct type *t = die_containing_type (die, cu);
10361 TYPE_VPTR_BASETYPE (type) = t;
10366 /* Our own class provides vtbl ptr. */
10367 for (i = TYPE_NFIELDS (t) - 1;
10368 i >= TYPE_N_BASECLASSES (t);
10371 const char *fieldname = TYPE_FIELD_NAME (t, i);
10373 if (is_vtable_name (fieldname, cu))
10375 TYPE_VPTR_FIELDNO (type) = i;
10380 /* Complain if virtual function table field not found. */
10381 if (i < TYPE_N_BASECLASSES (t))
10382 complaint (&symfile_complaints,
10383 _("virtual function table pointer "
10384 "not found when defining class '%s'"),
10385 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
10390 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
10393 else if (cu->producer
10394 && strncmp (cu->producer,
10395 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
10397 /* The IBM XLC compiler does not provide direct indication
10398 of the containing type, but the vtable pointer is
10399 always named __vfp. */
10403 for (i = TYPE_NFIELDS (type) - 1;
10404 i >= TYPE_N_BASECLASSES (type);
10407 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
10409 TYPE_VPTR_FIELDNO (type) = i;
10410 TYPE_VPTR_BASETYPE (type) = type;
10417 /* Copy fi.typedef_field_list linked list elements content into the
10418 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
10419 if (fi.typedef_field_list)
10421 int i = fi.typedef_field_list_count;
10423 ALLOCATE_CPLUS_STRUCT_TYPE (type);
10424 TYPE_TYPEDEF_FIELD_ARRAY (type)
10425 = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i);
10426 TYPE_TYPEDEF_FIELD_COUNT (type) = i;
10428 /* Reverse the list order to keep the debug info elements order. */
10431 struct typedef_field *dest, *src;
10433 dest = &TYPE_TYPEDEF_FIELD (type, i);
10434 src = &fi.typedef_field_list->field;
10435 fi.typedef_field_list = fi.typedef_field_list->next;
10440 do_cleanups (back_to);
10442 if (HAVE_CPLUS_STRUCT (type))
10443 TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java;
10446 quirk_gcc_member_function_pointer (type, objfile);
10448 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
10449 snapshots) has been known to create a die giving a declaration
10450 for a class that has, as a child, a die giving a definition for a
10451 nested class. So we have to process our children even if the
10452 current die is a declaration. Normally, of course, a declaration
10453 won't have any children at all. */
10455 while (child_die != NULL && child_die->tag)
10457 if (child_die->tag == DW_TAG_member
10458 || child_die->tag == DW_TAG_variable
10459 || child_die->tag == DW_TAG_inheritance
10460 || child_die->tag == DW_TAG_template_value_param
10461 || child_die->tag == DW_TAG_template_type_param)
10466 process_die (child_die, cu);
10468 child_die = sibling_die (child_die);
10471 /* Do not consider external references. According to the DWARF standard,
10472 these DIEs are identified by the fact that they have no byte_size
10473 attribute, and a declaration attribute. */
10474 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
10475 || !die_is_declaration (die, cu))
10476 new_symbol (die, type, cu);
10479 /* Given a DW_AT_enumeration_type die, set its type. We do not
10480 complete the type's fields yet, or create any symbols. */
10482 static struct type *
10483 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
10485 struct objfile *objfile = cu->objfile;
10487 struct attribute *attr;
10490 /* If the definition of this type lives in .debug_types, read that type.
10491 Don't follow DW_AT_specification though, that will take us back up
10492 the chain and we want to go down. */
10493 attr = dwarf2_attr_no_follow (die, DW_AT_signature);
10496 struct dwarf2_cu *type_cu = cu;
10497 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
10499 type = read_type_die (type_die, type_cu);
10501 /* TYPE_CU may not be the same as CU.
10502 Ensure TYPE is recorded in CU's type_hash table. */
10503 return set_die_type (die, type, cu);
10506 type = alloc_type (objfile);
10508 TYPE_CODE (type) = TYPE_CODE_ENUM;
10509 name = dwarf2_full_name (NULL, die, cu);
10511 TYPE_TAG_NAME (type) = (char *) name;
10513 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
10516 TYPE_LENGTH (type) = DW_UNSND (attr);
10520 TYPE_LENGTH (type) = 0;
10523 /* The enumeration DIE can be incomplete. In Ada, any type can be
10524 declared as private in the package spec, and then defined only
10525 inside the package body. Such types are known as Taft Amendment
10526 Types. When another package uses such a type, an incomplete DIE
10527 may be generated by the compiler. */
10528 if (die_is_declaration (die, cu))
10529 TYPE_STUB (type) = 1;
10531 return set_die_type (die, type, cu);
10534 /* Given a pointer to a die which begins an enumeration, process all
10535 the dies that define the members of the enumeration, and create the
10536 symbol for the enumeration type.
10538 NOTE: We reverse the order of the element list. */
10541 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
10543 struct type *this_type;
10545 this_type = get_die_type (die, cu);
10546 if (this_type == NULL)
10547 this_type = read_enumeration_type (die, cu);
10549 if (die->child != NULL)
10551 struct die_info *child_die;
10552 struct symbol *sym;
10553 struct field *fields = NULL;
10554 int num_fields = 0;
10555 int unsigned_enum = 1;
10560 child_die = die->child;
10561 while (child_die && child_die->tag)
10563 if (child_die->tag != DW_TAG_enumerator)
10565 process_die (child_die, cu);
10569 name = dwarf2_name (child_die, cu);
10572 sym = new_symbol (child_die, this_type, cu);
10573 if (SYMBOL_VALUE (sym) < 0)
10578 else if ((mask & SYMBOL_VALUE (sym)) != 0)
10581 mask |= SYMBOL_VALUE (sym);
10583 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
10585 fields = (struct field *)
10587 (num_fields + DW_FIELD_ALLOC_CHUNK)
10588 * sizeof (struct field));
10591 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
10592 FIELD_TYPE (fields[num_fields]) = NULL;
10593 SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym));
10594 FIELD_BITSIZE (fields[num_fields]) = 0;
10600 child_die = sibling_die (child_die);
10605 TYPE_NFIELDS (this_type) = num_fields;
10606 TYPE_FIELDS (this_type) = (struct field *)
10607 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
10608 memcpy (TYPE_FIELDS (this_type), fields,
10609 sizeof (struct field) * num_fields);
10613 TYPE_UNSIGNED (this_type) = 1;
10615 TYPE_FLAG_ENUM (this_type) = 1;
10618 /* If we are reading an enum from a .debug_types unit, and the enum
10619 is a declaration, and the enum is not the signatured type in the
10620 unit, then we do not want to add a symbol for it. Adding a
10621 symbol would in some cases obscure the true definition of the
10622 enum, giving users an incomplete type when the definition is
10623 actually available. Note that we do not want to do this for all
10624 enums which are just declarations, because C++0x allows forward
10625 enum declarations. */
10626 if (cu->per_cu->is_debug_types
10627 && die_is_declaration (die, cu))
10629 struct signatured_type *sig_type;
10632 = lookup_signatured_type_at_offset (dwarf2_per_objfile->objfile,
10633 cu->per_cu->info_or_types_section,
10634 cu->per_cu->offset);
10635 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
10636 if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off)
10640 new_symbol (die, this_type, cu);
10643 /* Extract all information from a DW_TAG_array_type DIE and put it in
10644 the DIE's type field. For now, this only handles one dimensional
10647 static struct type *
10648 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
10650 struct objfile *objfile = cu->objfile;
10651 struct die_info *child_die;
10653 struct type *element_type, *range_type, *index_type;
10654 struct type **range_types = NULL;
10655 struct attribute *attr;
10657 struct cleanup *back_to;
10660 element_type = die_type (die, cu);
10662 /* The die_type call above may have already set the type for this DIE. */
10663 type = get_die_type (die, cu);
10667 /* Irix 6.2 native cc creates array types without children for
10668 arrays with unspecified length. */
10669 if (die->child == NULL)
10671 index_type = objfile_type (objfile)->builtin_int;
10672 range_type = create_range_type (NULL, index_type, 0, -1);
10673 type = create_array_type (NULL, element_type, range_type);
10674 return set_die_type (die, type, cu);
10677 back_to = make_cleanup (null_cleanup, NULL);
10678 child_die = die->child;
10679 while (child_die && child_die->tag)
10681 if (child_die->tag == DW_TAG_subrange_type)
10683 struct type *child_type = read_type_die (child_die, cu);
10685 if (child_type != NULL)
10687 /* The range type was succesfully read. Save it for the
10688 array type creation. */
10689 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
10691 range_types = (struct type **)
10692 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
10693 * sizeof (struct type *));
10695 make_cleanup (free_current_contents, &range_types);
10697 range_types[ndim++] = child_type;
10700 child_die = sibling_die (child_die);
10703 /* Dwarf2 dimensions are output from left to right, create the
10704 necessary array types in backwards order. */
10706 type = element_type;
10708 if (read_array_order (die, cu) == DW_ORD_col_major)
10713 type = create_array_type (NULL, type, range_types[i++]);
10718 type = create_array_type (NULL, type, range_types[ndim]);
10721 /* Understand Dwarf2 support for vector types (like they occur on
10722 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
10723 array type. This is not part of the Dwarf2/3 standard yet, but a
10724 custom vendor extension. The main difference between a regular
10725 array and the vector variant is that vectors are passed by value
10727 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
10729 make_vector_type (type);
10731 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
10732 implementation may choose to implement triple vectors using this
10734 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
10737 if (DW_UNSND (attr) >= TYPE_LENGTH (type))
10738 TYPE_LENGTH (type) = DW_UNSND (attr);
10740 complaint (&symfile_complaints,
10741 _("DW_AT_byte_size for array type smaller "
10742 "than the total size of elements"));
10745 name = dwarf2_name (die, cu);
10747 TYPE_NAME (type) = name;
10749 /* Install the type in the die. */
10750 set_die_type (die, type, cu);
10752 /* set_die_type should be already done. */
10753 set_descriptive_type (type, die, cu);
10755 do_cleanups (back_to);
10760 static enum dwarf_array_dim_ordering
10761 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
10763 struct attribute *attr;
10765 attr = dwarf2_attr (die, DW_AT_ordering, cu);
10767 if (attr) return DW_SND (attr);
10769 /* GNU F77 is a special case, as at 08/2004 array type info is the
10770 opposite order to the dwarf2 specification, but data is still
10771 laid out as per normal fortran.
10773 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
10774 version checking. */
10776 if (cu->language == language_fortran
10777 && cu->producer && strstr (cu->producer, "GNU F77"))
10779 return DW_ORD_row_major;
10782 switch (cu->language_defn->la_array_ordering)
10784 case array_column_major:
10785 return DW_ORD_col_major;
10786 case array_row_major:
10788 return DW_ORD_row_major;
10792 /* Extract all information from a DW_TAG_set_type DIE and put it in
10793 the DIE's type field. */
10795 static struct type *
10796 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
10798 struct type *domain_type, *set_type;
10799 struct attribute *attr;
10801 domain_type = die_type (die, cu);
10803 /* The die_type call above may have already set the type for this DIE. */
10804 set_type = get_die_type (die, cu);
10808 set_type = create_set_type (NULL, domain_type);
10810 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
10812 TYPE_LENGTH (set_type) = DW_UNSND (attr);
10814 return set_die_type (die, set_type, cu);
10817 /* First cut: install each common block member as a global variable. */
10820 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
10822 struct die_info *child_die;
10823 struct attribute *attr;
10824 struct symbol *sym;
10825 CORE_ADDR base = (CORE_ADDR) 0;
10827 attr = dwarf2_attr (die, DW_AT_location, cu);
10830 /* Support the .debug_loc offsets. */
10831 if (attr_form_is_block (attr))
10833 base = decode_locdesc (DW_BLOCK (attr), cu);
10835 else if (attr_form_is_section_offset (attr))
10837 dwarf2_complex_location_expr_complaint ();
10841 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
10842 "common block member");
10845 if (die->child != NULL)
10847 child_die = die->child;
10848 while (child_die && child_die->tag)
10852 sym = new_symbol (child_die, NULL, cu);
10854 && handle_data_member_location (child_die, cu, &offset))
10856 SYMBOL_VALUE_ADDRESS (sym) = base + offset;
10857 add_symbol_to_list (sym, &global_symbols);
10859 child_die = sibling_die (child_die);
10864 /* Create a type for a C++ namespace. */
10866 static struct type *
10867 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
10869 struct objfile *objfile = cu->objfile;
10870 const char *previous_prefix, *name;
10874 /* For extensions, reuse the type of the original namespace. */
10875 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
10877 struct die_info *ext_die;
10878 struct dwarf2_cu *ext_cu = cu;
10880 ext_die = dwarf2_extension (die, &ext_cu);
10881 type = read_type_die (ext_die, ext_cu);
10883 /* EXT_CU may not be the same as CU.
10884 Ensure TYPE is recorded in CU's type_hash table. */
10885 return set_die_type (die, type, cu);
10888 name = namespace_name (die, &is_anonymous, cu);
10890 /* Now build the name of the current namespace. */
10892 previous_prefix = determine_prefix (die, cu);
10893 if (previous_prefix[0] != '\0')
10894 name = typename_concat (&objfile->objfile_obstack,
10895 previous_prefix, name, 0, cu);
10897 /* Create the type. */
10898 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
10900 TYPE_NAME (type) = (char *) name;
10901 TYPE_TAG_NAME (type) = TYPE_NAME (type);
10903 return set_die_type (die, type, cu);
10906 /* Read a C++ namespace. */
10909 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
10911 struct objfile *objfile = cu->objfile;
10914 /* Add a symbol associated to this if we haven't seen the namespace
10915 before. Also, add a using directive if it's an anonymous
10918 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
10922 type = read_type_die (die, cu);
10923 new_symbol (die, type, cu);
10925 namespace_name (die, &is_anonymous, cu);
10928 const char *previous_prefix = determine_prefix (die, cu);
10930 cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL,
10931 NULL, NULL, &objfile->objfile_obstack);
10935 if (die->child != NULL)
10937 struct die_info *child_die = die->child;
10939 while (child_die && child_die->tag)
10941 process_die (child_die, cu);
10942 child_die = sibling_die (child_die);
10947 /* Read a Fortran module as type. This DIE can be only a declaration used for
10948 imported module. Still we need that type as local Fortran "use ... only"
10949 declaration imports depend on the created type in determine_prefix. */
10951 static struct type *
10952 read_module_type (struct die_info *die, struct dwarf2_cu *cu)
10954 struct objfile *objfile = cu->objfile;
10958 module_name = dwarf2_name (die, cu);
10960 complaint (&symfile_complaints,
10961 _("DW_TAG_module has no name, offset 0x%x"),
10962 die->offset.sect_off);
10963 type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile);
10965 /* determine_prefix uses TYPE_TAG_NAME. */
10966 TYPE_TAG_NAME (type) = TYPE_NAME (type);
10968 return set_die_type (die, type, cu);
10971 /* Read a Fortran module. */
10974 read_module (struct die_info *die, struct dwarf2_cu *cu)
10976 struct die_info *child_die = die->child;
10978 while (child_die && child_die->tag)
10980 process_die (child_die, cu);
10981 child_die = sibling_die (child_die);
10985 /* Return the name of the namespace represented by DIE. Set
10986 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
10989 static const char *
10990 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
10992 struct die_info *current_die;
10993 const char *name = NULL;
10995 /* Loop through the extensions until we find a name. */
10997 for (current_die = die;
10998 current_die != NULL;
10999 current_die = dwarf2_extension (die, &cu))
11001 name = dwarf2_name (current_die, cu);
11006 /* Is it an anonymous namespace? */
11008 *is_anonymous = (name == NULL);
11010 name = CP_ANONYMOUS_NAMESPACE_STR;
11015 /* Extract all information from a DW_TAG_pointer_type DIE and add to
11016 the user defined type vector. */
11018 static struct type *
11019 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
11021 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
11022 struct comp_unit_head *cu_header = &cu->header;
11024 struct attribute *attr_byte_size;
11025 struct attribute *attr_address_class;
11026 int byte_size, addr_class;
11027 struct type *target_type;
11029 target_type = die_type (die, cu);
11031 /* The die_type call above may have already set the type for this DIE. */
11032 type = get_die_type (die, cu);
11036 type = lookup_pointer_type (target_type);
11038 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
11039 if (attr_byte_size)
11040 byte_size = DW_UNSND (attr_byte_size);
11042 byte_size = cu_header->addr_size;
11044 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
11045 if (attr_address_class)
11046 addr_class = DW_UNSND (attr_address_class);
11048 addr_class = DW_ADDR_none;
11050 /* If the pointer size or address class is different than the
11051 default, create a type variant marked as such and set the
11052 length accordingly. */
11053 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
11055 if (gdbarch_address_class_type_flags_p (gdbarch))
11059 type_flags = gdbarch_address_class_type_flags
11060 (gdbarch, byte_size, addr_class);
11061 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
11063 type = make_type_with_address_space (type, type_flags);
11065 else if (TYPE_LENGTH (type) != byte_size)
11067 complaint (&symfile_complaints,
11068 _("invalid pointer size %d"), byte_size);
11072 /* Should we also complain about unhandled address classes? */
11076 TYPE_LENGTH (type) = byte_size;
11077 return set_die_type (die, type, cu);
11080 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
11081 the user defined type vector. */
11083 static struct type *
11084 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
11087 struct type *to_type;
11088 struct type *domain;
11090 to_type = die_type (die, cu);
11091 domain = die_containing_type (die, cu);
11093 /* The calls above may have already set the type for this DIE. */
11094 type = get_die_type (die, cu);
11098 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
11099 type = lookup_methodptr_type (to_type);
11101 type = lookup_memberptr_type (to_type, domain);
11103 return set_die_type (die, type, cu);
11106 /* Extract all information from a DW_TAG_reference_type DIE and add to
11107 the user defined type vector. */
11109 static struct type *
11110 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
11112 struct comp_unit_head *cu_header = &cu->header;
11113 struct type *type, *target_type;
11114 struct attribute *attr;
11116 target_type = die_type (die, cu);
11118 /* The die_type call above may have already set the type for this DIE. */
11119 type = get_die_type (die, cu);
11123 type = lookup_reference_type (target_type);
11124 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11127 TYPE_LENGTH (type) = DW_UNSND (attr);
11131 TYPE_LENGTH (type) = cu_header->addr_size;
11133 return set_die_type (die, type, cu);
11136 static struct type *
11137 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
11139 struct type *base_type, *cv_type;
11141 base_type = die_type (die, cu);
11143 /* The die_type call above may have already set the type for this DIE. */
11144 cv_type = get_die_type (die, cu);
11148 /* In case the const qualifier is applied to an array type, the element type
11149 is so qualified, not the array type (section 6.7.3 of C99). */
11150 if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY)
11152 struct type *el_type, *inner_array;
11154 base_type = copy_type (base_type);
11155 inner_array = base_type;
11157 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
11159 TYPE_TARGET_TYPE (inner_array) =
11160 copy_type (TYPE_TARGET_TYPE (inner_array));
11161 inner_array = TYPE_TARGET_TYPE (inner_array);
11164 el_type = TYPE_TARGET_TYPE (inner_array);
11165 TYPE_TARGET_TYPE (inner_array) =
11166 make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL);
11168 return set_die_type (die, base_type, cu);
11171 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
11172 return set_die_type (die, cv_type, cu);
11175 static struct type *
11176 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
11178 struct type *base_type, *cv_type;
11180 base_type = die_type (die, cu);
11182 /* The die_type call above may have already set the type for this DIE. */
11183 cv_type = get_die_type (die, cu);
11187 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
11188 return set_die_type (die, cv_type, cu);
11191 /* Extract all information from a DW_TAG_string_type DIE and add to
11192 the user defined type vector. It isn't really a user defined type,
11193 but it behaves like one, with other DIE's using an AT_user_def_type
11194 attribute to reference it. */
11196 static struct type *
11197 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
11199 struct objfile *objfile = cu->objfile;
11200 struct gdbarch *gdbarch = get_objfile_arch (objfile);
11201 struct type *type, *range_type, *index_type, *char_type;
11202 struct attribute *attr;
11203 unsigned int length;
11205 attr = dwarf2_attr (die, DW_AT_string_length, cu);
11208 length = DW_UNSND (attr);
11212 /* Check for the DW_AT_byte_size attribute. */
11213 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11216 length = DW_UNSND (attr);
11224 index_type = objfile_type (objfile)->builtin_int;
11225 range_type = create_range_type (NULL, index_type, 1, length);
11226 char_type = language_string_char_type (cu->language_defn, gdbarch);
11227 type = create_string_type (NULL, char_type, range_type);
11229 return set_die_type (die, type, cu);
11232 /* Handle DIES due to C code like:
11236 int (*funcp)(int a, long l);
11240 ('funcp' generates a DW_TAG_subroutine_type DIE). */
11242 static struct type *
11243 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
11245 struct objfile *objfile = cu->objfile;
11246 struct type *type; /* Type that this function returns. */
11247 struct type *ftype; /* Function that returns above type. */
11248 struct attribute *attr;
11250 type = die_type (die, cu);
11252 /* The die_type call above may have already set the type for this DIE. */
11253 ftype = get_die_type (die, cu);
11257 ftype = lookup_function_type (type);
11259 /* All functions in C++, Pascal and Java have prototypes. */
11260 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
11261 if ((attr && (DW_UNSND (attr) != 0))
11262 || cu->language == language_cplus
11263 || cu->language == language_java
11264 || cu->language == language_pascal)
11265 TYPE_PROTOTYPED (ftype) = 1;
11266 else if (producer_is_realview (cu->producer))
11267 /* RealView does not emit DW_AT_prototyped. We can not
11268 distinguish prototyped and unprototyped functions; default to
11269 prototyped, since that is more common in modern code (and
11270 RealView warns about unprototyped functions). */
11271 TYPE_PROTOTYPED (ftype) = 1;
11273 /* Store the calling convention in the type if it's available in
11274 the subroutine die. Otherwise set the calling convention to
11275 the default value DW_CC_normal. */
11276 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
11278 TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr);
11279 else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL"))
11280 TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL;
11282 TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal;
11284 /* We need to add the subroutine type to the die immediately so
11285 we don't infinitely recurse when dealing with parameters
11286 declared as the same subroutine type. */
11287 set_die_type (die, ftype, cu);
11289 if (die->child != NULL)
11291 struct type *void_type = objfile_type (objfile)->builtin_void;
11292 struct die_info *child_die;
11293 int nparams, iparams;
11295 /* Count the number of parameters.
11296 FIXME: GDB currently ignores vararg functions, but knows about
11297 vararg member functions. */
11299 child_die = die->child;
11300 while (child_die && child_die->tag)
11302 if (child_die->tag == DW_TAG_formal_parameter)
11304 else if (child_die->tag == DW_TAG_unspecified_parameters)
11305 TYPE_VARARGS (ftype) = 1;
11306 child_die = sibling_die (child_die);
11309 /* Allocate storage for parameters and fill them in. */
11310 TYPE_NFIELDS (ftype) = nparams;
11311 TYPE_FIELDS (ftype) = (struct field *)
11312 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
11314 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
11315 even if we error out during the parameters reading below. */
11316 for (iparams = 0; iparams < nparams; iparams++)
11317 TYPE_FIELD_TYPE (ftype, iparams) = void_type;
11320 child_die = die->child;
11321 while (child_die && child_die->tag)
11323 if (child_die->tag == DW_TAG_formal_parameter)
11325 struct type *arg_type;
11327 /* DWARF version 2 has no clean way to discern C++
11328 static and non-static member functions. G++ helps
11329 GDB by marking the first parameter for non-static
11330 member functions (which is the this pointer) as
11331 artificial. We pass this information to
11332 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
11334 DWARF version 3 added DW_AT_object_pointer, which GCC
11335 4.5 does not yet generate. */
11336 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
11338 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
11341 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
11343 /* GCC/43521: In java, the formal parameter
11344 "this" is sometimes not marked with DW_AT_artificial. */
11345 if (cu->language == language_java)
11347 const char *name = dwarf2_name (child_die, cu);
11349 if (name && !strcmp (name, "this"))
11350 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1;
11353 arg_type = die_type (child_die, cu);
11355 /* RealView does not mark THIS as const, which the testsuite
11356 expects. GCC marks THIS as const in method definitions,
11357 but not in the class specifications (GCC PR 43053). */
11358 if (cu->language == language_cplus && !TYPE_CONST (arg_type)
11359 && TYPE_FIELD_ARTIFICIAL (ftype, iparams))
11362 struct dwarf2_cu *arg_cu = cu;
11363 const char *name = dwarf2_name (child_die, cu);
11365 attr = dwarf2_attr (die, DW_AT_object_pointer, cu);
11368 /* If the compiler emits this, use it. */
11369 if (follow_die_ref (die, attr, &arg_cu) == child_die)
11372 else if (name && strcmp (name, "this") == 0)
11373 /* Function definitions will have the argument names. */
11375 else if (name == NULL && iparams == 0)
11376 /* Declarations may not have the names, so like
11377 elsewhere in GDB, assume an artificial first
11378 argument is "this". */
11382 arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type),
11386 TYPE_FIELD_TYPE (ftype, iparams) = arg_type;
11389 child_die = sibling_die (child_die);
11396 static struct type *
11397 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
11399 struct objfile *objfile = cu->objfile;
11400 const char *name = NULL;
11401 struct type *this_type, *target_type;
11403 name = dwarf2_full_name (NULL, die, cu);
11404 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
11405 TYPE_FLAG_TARGET_STUB, NULL, objfile);
11406 TYPE_NAME (this_type) = (char *) name;
11407 set_die_type (die, this_type, cu);
11408 target_type = die_type (die, cu);
11409 if (target_type != this_type)
11410 TYPE_TARGET_TYPE (this_type) = target_type;
11413 /* Self-referential typedefs are, it seems, not allowed by the DWARF
11414 spec and cause infinite loops in GDB. */
11415 complaint (&symfile_complaints,
11416 _("Self-referential DW_TAG_typedef "
11417 "- DIE at 0x%x [in module %s]"),
11418 die->offset.sect_off, objfile->name);
11419 TYPE_TARGET_TYPE (this_type) = NULL;
11424 /* Find a representation of a given base type and install
11425 it in the TYPE field of the die. */
11427 static struct type *
11428 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
11430 struct objfile *objfile = cu->objfile;
11432 struct attribute *attr;
11433 int encoding = 0, size = 0;
11435 enum type_code code = TYPE_CODE_INT;
11436 int type_flags = 0;
11437 struct type *target_type = NULL;
11439 attr = dwarf2_attr (die, DW_AT_encoding, cu);
11442 encoding = DW_UNSND (attr);
11444 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11447 size = DW_UNSND (attr);
11449 name = dwarf2_name (die, cu);
11452 complaint (&symfile_complaints,
11453 _("DW_AT_name missing from DW_TAG_base_type"));
11458 case DW_ATE_address:
11459 /* Turn DW_ATE_address into a void * pointer. */
11460 code = TYPE_CODE_PTR;
11461 type_flags |= TYPE_FLAG_UNSIGNED;
11462 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
11464 case DW_ATE_boolean:
11465 code = TYPE_CODE_BOOL;
11466 type_flags |= TYPE_FLAG_UNSIGNED;
11468 case DW_ATE_complex_float:
11469 code = TYPE_CODE_COMPLEX;
11470 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
11472 case DW_ATE_decimal_float:
11473 code = TYPE_CODE_DECFLOAT;
11476 code = TYPE_CODE_FLT;
11478 case DW_ATE_signed:
11480 case DW_ATE_unsigned:
11481 type_flags |= TYPE_FLAG_UNSIGNED;
11482 if (cu->language == language_fortran
11484 && strncmp (name, "character(", sizeof ("character(") - 1) == 0)
11485 code = TYPE_CODE_CHAR;
11487 case DW_ATE_signed_char:
11488 if (cu->language == language_ada || cu->language == language_m2
11489 || cu->language == language_pascal
11490 || cu->language == language_fortran)
11491 code = TYPE_CODE_CHAR;
11493 case DW_ATE_unsigned_char:
11494 if (cu->language == language_ada || cu->language == language_m2
11495 || cu->language == language_pascal
11496 || cu->language == language_fortran)
11497 code = TYPE_CODE_CHAR;
11498 type_flags |= TYPE_FLAG_UNSIGNED;
11501 /* We just treat this as an integer and then recognize the
11502 type by name elsewhere. */
11506 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
11507 dwarf_type_encoding_name (encoding));
11511 type = init_type (code, size, type_flags, NULL, objfile);
11512 TYPE_NAME (type) = name;
11513 TYPE_TARGET_TYPE (type) = target_type;
11515 if (name && strcmp (name, "char") == 0)
11516 TYPE_NOSIGN (type) = 1;
11518 return set_die_type (die, type, cu);
11521 /* Read the given DW_AT_subrange DIE. */
11523 static struct type *
11524 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
11526 struct type *base_type;
11527 struct type *range_type;
11528 struct attribute *attr;
11530 int low_default_is_valid;
11532 LONGEST negative_mask;
11534 base_type = die_type (die, cu);
11535 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
11536 check_typedef (base_type);
11538 /* The die_type call above may have already set the type for this DIE. */
11539 range_type = get_die_type (die, cu);
11543 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
11544 omitting DW_AT_lower_bound. */
11545 switch (cu->language)
11548 case language_cplus:
11550 low_default_is_valid = 1;
11552 case language_fortran:
11554 low_default_is_valid = 1;
11557 case language_java:
11558 case language_objc:
11560 low_default_is_valid = (cu->header.version >= 4);
11564 case language_pascal:
11566 low_default_is_valid = (cu->header.version >= 4);
11570 low_default_is_valid = 0;
11574 /* FIXME: For variable sized arrays either of these could be
11575 a variable rather than a constant value. We'll allow it,
11576 but we don't know how to handle it. */
11577 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
11579 low = dwarf2_get_attr_constant_value (attr, low);
11580 else if (!low_default_is_valid)
11581 complaint (&symfile_complaints, _("Missing DW_AT_lower_bound "
11582 "- DIE at 0x%x [in module %s]"),
11583 die->offset.sect_off, cu->objfile->name);
11585 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
11588 if (attr_form_is_block (attr) || is_ref_attr (attr))
11590 /* GCC encodes arrays with unspecified or dynamic length
11591 with a DW_FORM_block1 attribute or a reference attribute.
11592 FIXME: GDB does not yet know how to handle dynamic
11593 arrays properly, treat them as arrays with unspecified
11596 FIXME: jimb/2003-09-22: GDB does not really know
11597 how to handle arrays of unspecified length
11598 either; we just represent them as zero-length
11599 arrays. Choose an appropriate upper bound given
11600 the lower bound we've computed above. */
11604 high = dwarf2_get_attr_constant_value (attr, 1);
11608 attr = dwarf2_attr (die, DW_AT_count, cu);
11611 int count = dwarf2_get_attr_constant_value (attr, 1);
11612 high = low + count - 1;
11616 /* Unspecified array length. */
11621 /* Dwarf-2 specifications explicitly allows to create subrange types
11622 without specifying a base type.
11623 In that case, the base type must be set to the type of
11624 the lower bound, upper bound or count, in that order, if any of these
11625 three attributes references an object that has a type.
11626 If no base type is found, the Dwarf-2 specifications say that
11627 a signed integer type of size equal to the size of an address should
11629 For the following C code: `extern char gdb_int [];'
11630 GCC produces an empty range DIE.
11631 FIXME: muller/2010-05-28: Possible references to object for low bound,
11632 high bound or count are not yet handled by this code. */
11633 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
11635 struct objfile *objfile = cu->objfile;
11636 struct gdbarch *gdbarch = get_objfile_arch (objfile);
11637 int addr_size = gdbarch_addr_bit (gdbarch) /8;
11638 struct type *int_type = objfile_type (objfile)->builtin_int;
11640 /* Test "int", "long int", and "long long int" objfile types,
11641 and select the first one having a size above or equal to the
11642 architecture address size. */
11643 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
11644 base_type = int_type;
11647 int_type = objfile_type (objfile)->builtin_long;
11648 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
11649 base_type = int_type;
11652 int_type = objfile_type (objfile)->builtin_long_long;
11653 if (int_type && TYPE_LENGTH (int_type) >= addr_size)
11654 base_type = int_type;
11660 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
11661 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
11662 low |= negative_mask;
11663 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
11664 high |= negative_mask;
11666 range_type = create_range_type (NULL, base_type, low, high);
11668 /* Mark arrays with dynamic length at least as an array of unspecified
11669 length. GDB could check the boundary but before it gets implemented at
11670 least allow accessing the array elements. */
11671 if (attr && attr_form_is_block (attr))
11672 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
11674 /* Ada expects an empty array on no boundary attributes. */
11675 if (attr == NULL && cu->language != language_ada)
11676 TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1;
11678 name = dwarf2_name (die, cu);
11680 TYPE_NAME (range_type) = name;
11682 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
11684 TYPE_LENGTH (range_type) = DW_UNSND (attr);
11686 set_die_type (die, range_type, cu);
11688 /* set_die_type should be already done. */
11689 set_descriptive_type (range_type, die, cu);
11694 static struct type *
11695 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
11699 /* For now, we only support the C meaning of an unspecified type: void. */
11701 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
11702 TYPE_NAME (type) = dwarf2_name (die, cu);
11704 return set_die_type (die, type, cu);
11707 /* Read a single die and all its descendents. Set the die's sibling
11708 field to NULL; set other fields in the die correctly, and set all
11709 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
11710 location of the info_ptr after reading all of those dies. PARENT
11711 is the parent of the die in question. */
11713 static struct die_info *
11714 read_die_and_children (const struct die_reader_specs *reader,
11715 gdb_byte *info_ptr,
11716 gdb_byte **new_info_ptr,
11717 struct die_info *parent)
11719 struct die_info *die;
11723 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
11726 *new_info_ptr = cur_ptr;
11729 store_in_ref_table (die, reader->cu);
11732 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
11736 *new_info_ptr = cur_ptr;
11739 die->sibling = NULL;
11740 die->parent = parent;
11744 /* Read a die, all of its descendents, and all of its siblings; set
11745 all of the fields of all of the dies correctly. Arguments are as
11746 in read_die_and_children. */
11748 static struct die_info *
11749 read_die_and_siblings (const struct die_reader_specs *reader,
11750 gdb_byte *info_ptr,
11751 gdb_byte **new_info_ptr,
11752 struct die_info *parent)
11754 struct die_info *first_die, *last_sibling;
11757 cur_ptr = info_ptr;
11758 first_die = last_sibling = NULL;
11762 struct die_info *die
11763 = read_die_and_children (reader, cur_ptr, &cur_ptr, parent);
11767 *new_info_ptr = cur_ptr;
11774 last_sibling->sibling = die;
11776 last_sibling = die;
11780 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
11782 The caller is responsible for filling in the extra attributes
11783 and updating (*DIEP)->num_attrs.
11784 Set DIEP to point to a newly allocated die with its information,
11785 except for its child, sibling, and parent fields.
11786 Set HAS_CHILDREN to tell whether the die has children or not. */
11789 read_full_die_1 (const struct die_reader_specs *reader,
11790 struct die_info **diep, gdb_byte *info_ptr,
11791 int *has_children, int num_extra_attrs)
11793 unsigned int abbrev_number, bytes_read, i;
11794 sect_offset offset;
11795 struct abbrev_info *abbrev;
11796 struct die_info *die;
11797 struct dwarf2_cu *cu = reader->cu;
11798 bfd *abfd = reader->abfd;
11800 offset.sect_off = info_ptr - reader->buffer;
11801 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
11802 info_ptr += bytes_read;
11803 if (!abbrev_number)
11810 abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number);
11812 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
11814 bfd_get_filename (abfd));
11816 die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs);
11817 die->offset = offset;
11818 die->tag = abbrev->tag;
11819 die->abbrev = abbrev_number;
11821 /* Make the result usable.
11822 The caller needs to update num_attrs after adding the extra
11824 die->num_attrs = abbrev->num_attrs;
11826 for (i = 0; i < abbrev->num_attrs; ++i)
11827 info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i],
11831 *has_children = abbrev->has_children;
11835 /* Read a die and all its attributes.
11836 Set DIEP to point to a newly allocated die with its information,
11837 except for its child, sibling, and parent fields.
11838 Set HAS_CHILDREN to tell whether the die has children or not. */
11841 read_full_die (const struct die_reader_specs *reader,
11842 struct die_info **diep, gdb_byte *info_ptr,
11845 return read_full_die_1 (reader, diep, info_ptr, has_children, 0);
11848 /* Abbreviation tables.
11850 In DWARF version 2, the description of the debugging information is
11851 stored in a separate .debug_abbrev section. Before we read any
11852 dies from a section we read in all abbreviations and install them
11853 in a hash table. */
11855 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
11857 static struct abbrev_info *
11858 abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table)
11860 struct abbrev_info *abbrev;
11862 abbrev = (struct abbrev_info *)
11863 obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info));
11864 memset (abbrev, 0, sizeof (struct abbrev_info));
11868 /* Add an abbreviation to the table. */
11871 abbrev_table_add_abbrev (struct abbrev_table *abbrev_table,
11872 unsigned int abbrev_number,
11873 struct abbrev_info *abbrev)
11875 unsigned int hash_number;
11877 hash_number = abbrev_number % ABBREV_HASH_SIZE;
11878 abbrev->next = abbrev_table->abbrevs[hash_number];
11879 abbrev_table->abbrevs[hash_number] = abbrev;
11882 /* Look up an abbrev in the table.
11883 Returns NULL if the abbrev is not found. */
11885 static struct abbrev_info *
11886 abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table,
11887 unsigned int abbrev_number)
11889 unsigned int hash_number;
11890 struct abbrev_info *abbrev;
11892 hash_number = abbrev_number % ABBREV_HASH_SIZE;
11893 abbrev = abbrev_table->abbrevs[hash_number];
11897 if (abbrev->number == abbrev_number)
11899 abbrev = abbrev->next;
11904 /* Read in an abbrev table. */
11906 static struct abbrev_table *
11907 abbrev_table_read_table (struct dwarf2_section_info *section,
11908 sect_offset offset)
11910 struct objfile *objfile = dwarf2_per_objfile->objfile;
11911 bfd *abfd = section->asection->owner;
11912 struct abbrev_table *abbrev_table;
11913 gdb_byte *abbrev_ptr;
11914 struct abbrev_info *cur_abbrev;
11915 unsigned int abbrev_number, bytes_read, abbrev_name;
11916 unsigned int abbrev_form;
11917 struct attr_abbrev *cur_attrs;
11918 unsigned int allocated_attrs;
11920 abbrev_table = XMALLOC (struct abbrev_table);
11921 abbrev_table->offset = offset;
11922 obstack_init (&abbrev_table->abbrev_obstack);
11923 abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack,
11925 * sizeof (struct abbrev_info *)));
11926 memset (abbrev_table->abbrevs, 0,
11927 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
11929 dwarf2_read_section (objfile, section);
11930 abbrev_ptr = section->buffer + offset.sect_off;
11931 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
11932 abbrev_ptr += bytes_read;
11934 allocated_attrs = ATTR_ALLOC_CHUNK;
11935 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
11937 /* Loop until we reach an abbrev number of 0. */
11938 while (abbrev_number)
11940 cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table);
11942 /* read in abbrev header */
11943 cur_abbrev->number = abbrev_number;
11944 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
11945 abbrev_ptr += bytes_read;
11946 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
11949 /* now read in declarations */
11950 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
11951 abbrev_ptr += bytes_read;
11952 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
11953 abbrev_ptr += bytes_read;
11954 while (abbrev_name)
11956 if (cur_abbrev->num_attrs == allocated_attrs)
11958 allocated_attrs += ATTR_ALLOC_CHUNK;
11960 = xrealloc (cur_attrs, (allocated_attrs
11961 * sizeof (struct attr_abbrev)));
11964 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
11965 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
11966 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
11967 abbrev_ptr += bytes_read;
11968 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
11969 abbrev_ptr += bytes_read;
11972 cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack,
11973 (cur_abbrev->num_attrs
11974 * sizeof (struct attr_abbrev)));
11975 memcpy (cur_abbrev->attrs, cur_attrs,
11976 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
11978 abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev);
11980 /* Get next abbreviation.
11981 Under Irix6 the abbreviations for a compilation unit are not
11982 always properly terminated with an abbrev number of 0.
11983 Exit loop if we encounter an abbreviation which we have
11984 already read (which means we are about to read the abbreviations
11985 for the next compile unit) or if the end of the abbreviation
11986 table is reached. */
11987 if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size)
11989 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
11990 abbrev_ptr += bytes_read;
11991 if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL)
11996 return abbrev_table;
11999 /* Free the resources held by ABBREV_TABLE. */
12002 abbrev_table_free (struct abbrev_table *abbrev_table)
12004 obstack_free (&abbrev_table->abbrev_obstack, NULL);
12005 xfree (abbrev_table);
12008 /* Same as abbrev_table_free but as a cleanup.
12009 We pass in a pointer to the pointer to the table so that we can
12010 set the pointer to NULL when we're done. It also simplifies
12011 build_type_unit_groups. */
12014 abbrev_table_free_cleanup (void *table_ptr)
12016 struct abbrev_table **abbrev_table_ptr = table_ptr;
12018 if (*abbrev_table_ptr != NULL)
12019 abbrev_table_free (*abbrev_table_ptr);
12020 *abbrev_table_ptr = NULL;
12023 /* Read the abbrev table for CU from ABBREV_SECTION. */
12026 dwarf2_read_abbrevs (struct dwarf2_cu *cu,
12027 struct dwarf2_section_info *abbrev_section)
12030 abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset);
12033 /* Release the memory used by the abbrev table for a compilation unit. */
12036 dwarf2_free_abbrev_table (void *ptr_to_cu)
12038 struct dwarf2_cu *cu = ptr_to_cu;
12040 abbrev_table_free (cu->abbrev_table);
12041 /* Set this to NULL so that we SEGV if we try to read it later,
12042 and also because free_comp_unit verifies this is NULL. */
12043 cu->abbrev_table = NULL;
12046 /* Returns nonzero if TAG represents a type that we might generate a partial
12050 is_type_tag_for_partial (int tag)
12055 /* Some types that would be reasonable to generate partial symbols for,
12056 that we don't at present. */
12057 case DW_TAG_array_type:
12058 case DW_TAG_file_type:
12059 case DW_TAG_ptr_to_member_type:
12060 case DW_TAG_set_type:
12061 case DW_TAG_string_type:
12062 case DW_TAG_subroutine_type:
12064 case DW_TAG_base_type:
12065 case DW_TAG_class_type:
12066 case DW_TAG_interface_type:
12067 case DW_TAG_enumeration_type:
12068 case DW_TAG_structure_type:
12069 case DW_TAG_subrange_type:
12070 case DW_TAG_typedef:
12071 case DW_TAG_union_type:
12078 /* Load all DIEs that are interesting for partial symbols into memory. */
12080 static struct partial_die_info *
12081 load_partial_dies (const struct die_reader_specs *reader,
12082 gdb_byte *info_ptr, int building_psymtab)
12084 struct dwarf2_cu *cu = reader->cu;
12085 struct objfile *objfile = cu->objfile;
12086 struct partial_die_info *part_die;
12087 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
12088 struct abbrev_info *abbrev;
12089 unsigned int bytes_read;
12090 unsigned int load_all = 0;
12091 int nesting_level = 1;
12096 gdb_assert (cu->per_cu != NULL);
12097 if (cu->per_cu->load_all_dies)
12101 = htab_create_alloc_ex (cu->header.length / 12,
12105 &cu->comp_unit_obstack,
12106 hashtab_obstack_allocate,
12107 dummy_obstack_deallocate);
12109 part_die = obstack_alloc (&cu->comp_unit_obstack,
12110 sizeof (struct partial_die_info));
12114 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
12116 /* A NULL abbrev means the end of a series of children. */
12117 if (abbrev == NULL)
12119 if (--nesting_level == 0)
12121 /* PART_DIE was probably the last thing allocated on the
12122 comp_unit_obstack, so we could call obstack_free
12123 here. We don't do that because the waste is small,
12124 and will be cleaned up when we're done with this
12125 compilation unit. This way, we're also more robust
12126 against other users of the comp_unit_obstack. */
12129 info_ptr += bytes_read;
12130 last_die = parent_die;
12131 parent_die = parent_die->die_parent;
12135 /* Check for template arguments. We never save these; if
12136 they're seen, we just mark the parent, and go on our way. */
12137 if (parent_die != NULL
12138 && cu->language == language_cplus
12139 && (abbrev->tag == DW_TAG_template_type_param
12140 || abbrev->tag == DW_TAG_template_value_param))
12142 parent_die->has_template_arguments = 1;
12146 /* We don't need a partial DIE for the template argument. */
12147 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
12152 /* We only recurse into c++ subprograms looking for template arguments.
12153 Skip their other children. */
12155 && cu->language == language_cplus
12156 && parent_die != NULL
12157 && parent_die->tag == DW_TAG_subprogram)
12159 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
12163 /* Check whether this DIE is interesting enough to save. Normally
12164 we would not be interested in members here, but there may be
12165 later variables referencing them via DW_AT_specification (for
12166 static members). */
12168 && !is_type_tag_for_partial (abbrev->tag)
12169 && abbrev->tag != DW_TAG_constant
12170 && abbrev->tag != DW_TAG_enumerator
12171 && abbrev->tag != DW_TAG_subprogram
12172 && abbrev->tag != DW_TAG_lexical_block
12173 && abbrev->tag != DW_TAG_variable
12174 && abbrev->tag != DW_TAG_namespace
12175 && abbrev->tag != DW_TAG_module
12176 && abbrev->tag != DW_TAG_member
12177 && abbrev->tag != DW_TAG_imported_unit)
12179 /* Otherwise we skip to the next sibling, if any. */
12180 info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev);
12184 info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read,
12187 /* This two-pass algorithm for processing partial symbols has a
12188 high cost in cache pressure. Thus, handle some simple cases
12189 here which cover the majority of C partial symbols. DIEs
12190 which neither have specification tags in them, nor could have
12191 specification tags elsewhere pointing at them, can simply be
12192 processed and discarded.
12194 This segment is also optional; scan_partial_symbols and
12195 add_partial_symbol will handle these DIEs if we chain
12196 them in normally. When compilers which do not emit large
12197 quantities of duplicate debug information are more common,
12198 this code can probably be removed. */
12200 /* Any complete simple types at the top level (pretty much all
12201 of them, for a language without namespaces), can be processed
12203 if (parent_die == NULL
12204 && part_die->has_specification == 0
12205 && part_die->is_declaration == 0
12206 && ((part_die->tag == DW_TAG_typedef && !part_die->has_children)
12207 || part_die->tag == DW_TAG_base_type
12208 || part_die->tag == DW_TAG_subrange_type))
12210 if (building_psymtab && part_die->name != NULL)
12211 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
12212 VAR_DOMAIN, LOC_TYPEDEF,
12213 &objfile->static_psymbols,
12214 0, (CORE_ADDR) 0, cu->language, objfile);
12215 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
12219 /* The exception for DW_TAG_typedef with has_children above is
12220 a workaround of GCC PR debug/47510. In the case of this complaint
12221 type_name_no_tag_or_error will error on such types later.
12223 GDB skipped children of DW_TAG_typedef by the shortcut above and then
12224 it could not find the child DIEs referenced later, this is checked
12225 above. In correct DWARF DW_TAG_typedef should have no children. */
12227 if (part_die->tag == DW_TAG_typedef && part_die->has_children)
12228 complaint (&symfile_complaints,
12229 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
12230 "- DIE at 0x%x [in module %s]"),
12231 part_die->offset.sect_off, objfile->name);
12233 /* If we're at the second level, and we're an enumerator, and
12234 our parent has no specification (meaning possibly lives in a
12235 namespace elsewhere), then we can add the partial symbol now
12236 instead of queueing it. */
12237 if (part_die->tag == DW_TAG_enumerator
12238 && parent_die != NULL
12239 && parent_die->die_parent == NULL
12240 && parent_die->tag == DW_TAG_enumeration_type
12241 && parent_die->has_specification == 0)
12243 if (part_die->name == NULL)
12244 complaint (&symfile_complaints,
12245 _("malformed enumerator DIE ignored"));
12246 else if (building_psymtab)
12247 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
12248 VAR_DOMAIN, LOC_CONST,
12249 (cu->language == language_cplus
12250 || cu->language == language_java)
12251 ? &objfile->global_psymbols
12252 : &objfile->static_psymbols,
12253 0, (CORE_ADDR) 0, cu->language, objfile);
12255 info_ptr = locate_pdi_sibling (reader, part_die, info_ptr);
12259 /* We'll save this DIE so link it in. */
12260 part_die->die_parent = parent_die;
12261 part_die->die_sibling = NULL;
12262 part_die->die_child = NULL;
12264 if (last_die && last_die == parent_die)
12265 last_die->die_child = part_die;
12267 last_die->die_sibling = part_die;
12269 last_die = part_die;
12271 if (first_die == NULL)
12272 first_die = part_die;
12274 /* Maybe add the DIE to the hash table. Not all DIEs that we
12275 find interesting need to be in the hash table, because we
12276 also have the parent/sibling/child chains; only those that we
12277 might refer to by offset later during partial symbol reading.
12279 For now this means things that might have be the target of a
12280 DW_AT_specification, DW_AT_abstract_origin, or
12281 DW_AT_extension. DW_AT_extension will refer only to
12282 namespaces; DW_AT_abstract_origin refers to functions (and
12283 many things under the function DIE, but we do not recurse
12284 into function DIEs during partial symbol reading) and
12285 possibly variables as well; DW_AT_specification refers to
12286 declarations. Declarations ought to have the DW_AT_declaration
12287 flag. It happens that GCC forgets to put it in sometimes, but
12288 only for functions, not for types.
12290 Adding more things than necessary to the hash table is harmless
12291 except for the performance cost. Adding too few will result in
12292 wasted time in find_partial_die, when we reread the compilation
12293 unit with load_all_dies set. */
12296 || abbrev->tag == DW_TAG_constant
12297 || abbrev->tag == DW_TAG_subprogram
12298 || abbrev->tag == DW_TAG_variable
12299 || abbrev->tag == DW_TAG_namespace
12300 || part_die->is_declaration)
12304 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
12305 part_die->offset.sect_off, INSERT);
12309 part_die = obstack_alloc (&cu->comp_unit_obstack,
12310 sizeof (struct partial_die_info));
12312 /* For some DIEs we want to follow their children (if any). For C
12313 we have no reason to follow the children of structures; for other
12314 languages we have to, so that we can get at method physnames
12315 to infer fully qualified class names, for DW_AT_specification,
12316 and for C++ template arguments. For C++, we also look one level
12317 inside functions to find template arguments (if the name of the
12318 function does not already contain the template arguments).
12320 For Ada, we need to scan the children of subprograms and lexical
12321 blocks as well because Ada allows the definition of nested
12322 entities that could be interesting for the debugger, such as
12323 nested subprograms for instance. */
12324 if (last_die->has_children
12326 || last_die->tag == DW_TAG_namespace
12327 || last_die->tag == DW_TAG_module
12328 || last_die->tag == DW_TAG_enumeration_type
12329 || (cu->language == language_cplus
12330 && last_die->tag == DW_TAG_subprogram
12331 && (last_die->name == NULL
12332 || strchr (last_die->name, '<') == NULL))
12333 || (cu->language != language_c
12334 && (last_die->tag == DW_TAG_class_type
12335 || last_die->tag == DW_TAG_interface_type
12336 || last_die->tag == DW_TAG_structure_type
12337 || last_die->tag == DW_TAG_union_type))
12338 || (cu->language == language_ada
12339 && (last_die->tag == DW_TAG_subprogram
12340 || last_die->tag == DW_TAG_lexical_block))))
12343 parent_die = last_die;
12347 /* Otherwise we skip to the next sibling, if any. */
12348 info_ptr = locate_pdi_sibling (reader, last_die, info_ptr);
12350 /* Back to the top, do it again. */
12354 /* Read a minimal amount of information into the minimal die structure. */
12357 read_partial_die (const struct die_reader_specs *reader,
12358 struct partial_die_info *part_die,
12359 struct abbrev_info *abbrev, unsigned int abbrev_len,
12360 gdb_byte *info_ptr)
12362 struct dwarf2_cu *cu = reader->cu;
12363 struct objfile *objfile = cu->objfile;
12364 gdb_byte *buffer = reader->buffer;
12366 struct attribute attr;
12367 int has_low_pc_attr = 0;
12368 int has_high_pc_attr = 0;
12369 int high_pc_relative = 0;
12371 memset (part_die, 0, sizeof (struct partial_die_info));
12373 part_die->offset.sect_off = info_ptr - buffer;
12375 info_ptr += abbrev_len;
12377 if (abbrev == NULL)
12380 part_die->tag = abbrev->tag;
12381 part_die->has_children = abbrev->has_children;
12383 for (i = 0; i < abbrev->num_attrs; ++i)
12385 info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr);
12387 /* Store the data if it is of an attribute we want to keep in a
12388 partial symbol table. */
12392 switch (part_die->tag)
12394 case DW_TAG_compile_unit:
12395 case DW_TAG_partial_unit:
12396 case DW_TAG_type_unit:
12397 /* Compilation units have a DW_AT_name that is a filename, not
12398 a source language identifier. */
12399 case DW_TAG_enumeration_type:
12400 case DW_TAG_enumerator:
12401 /* These tags always have simple identifiers already; no need
12402 to canonicalize them. */
12403 part_die->name = DW_STRING (&attr);
12407 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
12408 &objfile->objfile_obstack);
12412 case DW_AT_linkage_name:
12413 case DW_AT_MIPS_linkage_name:
12414 /* Note that both forms of linkage name might appear. We
12415 assume they will be the same, and we only store the last
12417 if (cu->language == language_ada)
12418 part_die->name = DW_STRING (&attr);
12419 part_die->linkage_name = DW_STRING (&attr);
12422 has_low_pc_attr = 1;
12423 part_die->lowpc = DW_ADDR (&attr);
12425 case DW_AT_high_pc:
12426 has_high_pc_attr = 1;
12427 if (attr.form == DW_FORM_addr
12428 || attr.form == DW_FORM_GNU_addr_index)
12429 part_die->highpc = DW_ADDR (&attr);
12432 high_pc_relative = 1;
12433 part_die->highpc = DW_UNSND (&attr);
12436 case DW_AT_location:
12437 /* Support the .debug_loc offsets. */
12438 if (attr_form_is_block (&attr))
12440 part_die->d.locdesc = DW_BLOCK (&attr);
12442 else if (attr_form_is_section_offset (&attr))
12444 dwarf2_complex_location_expr_complaint ();
12448 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
12449 "partial symbol information");
12452 case DW_AT_external:
12453 part_die->is_external = DW_UNSND (&attr);
12455 case DW_AT_declaration:
12456 part_die->is_declaration = DW_UNSND (&attr);
12459 part_die->has_type = 1;
12461 case DW_AT_abstract_origin:
12462 case DW_AT_specification:
12463 case DW_AT_extension:
12464 part_die->has_specification = 1;
12465 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
12467 case DW_AT_sibling:
12468 /* Ignore absolute siblings, they might point outside of
12469 the current compile unit. */
12470 if (attr.form == DW_FORM_ref_addr)
12471 complaint (&symfile_complaints,
12472 _("ignoring absolute DW_AT_sibling"));
12474 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off;
12476 case DW_AT_byte_size:
12477 part_die->has_byte_size = 1;
12479 case DW_AT_calling_convention:
12480 /* DWARF doesn't provide a way to identify a program's source-level
12481 entry point. DW_AT_calling_convention attributes are only meant
12482 to describe functions' calling conventions.
12484 However, because it's a necessary piece of information in
12485 Fortran, and because DW_CC_program is the only piece of debugging
12486 information whose definition refers to a 'main program' at all,
12487 several compilers have begun marking Fortran main programs with
12488 DW_CC_program --- even when those functions use the standard
12489 calling conventions.
12491 So until DWARF specifies a way to provide this information and
12492 compilers pick up the new representation, we'll support this
12494 if (DW_UNSND (&attr) == DW_CC_program
12495 && cu->language == language_fortran)
12497 set_main_name (part_die->name);
12499 /* As this DIE has a static linkage the name would be difficult
12500 to look up later. */
12501 language_of_main = language_fortran;
12505 if (DW_UNSND (&attr) == DW_INL_inlined
12506 || DW_UNSND (&attr) == DW_INL_declared_inlined)
12507 part_die->may_be_inlined = 1;
12511 if (part_die->tag == DW_TAG_imported_unit)
12512 part_die->d.offset = dwarf2_get_ref_die_offset (&attr);
12520 if (high_pc_relative)
12521 part_die->highpc += part_die->lowpc;
12523 if (has_low_pc_attr && has_high_pc_attr)
12525 /* When using the GNU linker, .gnu.linkonce. sections are used to
12526 eliminate duplicate copies of functions and vtables and such.
12527 The linker will arbitrarily choose one and discard the others.
12528 The AT_*_pc values for such functions refer to local labels in
12529 these sections. If the section from that file was discarded, the
12530 labels are not in the output, so the relocs get a value of 0.
12531 If this is a discarded function, mark the pc bounds as invalid,
12532 so that GDB will ignore it. */
12533 if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero)
12535 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12537 complaint (&symfile_complaints,
12538 _("DW_AT_low_pc %s is zero "
12539 "for DIE at 0x%x [in module %s]"),
12540 paddress (gdbarch, part_die->lowpc),
12541 part_die->offset.sect_off, objfile->name);
12543 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
12544 else if (part_die->lowpc >= part_die->highpc)
12546 struct gdbarch *gdbarch = get_objfile_arch (objfile);
12548 complaint (&symfile_complaints,
12549 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
12550 "for DIE at 0x%x [in module %s]"),
12551 paddress (gdbarch, part_die->lowpc),
12552 paddress (gdbarch, part_die->highpc),
12553 part_die->offset.sect_off, objfile->name);
12556 part_die->has_pc_info = 1;
12562 /* Find a cached partial DIE at OFFSET in CU. */
12564 static struct partial_die_info *
12565 find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu)
12567 struct partial_die_info *lookup_die = NULL;
12568 struct partial_die_info part_die;
12570 part_die.offset = offset;
12571 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die,
12577 /* Find a partial DIE at OFFSET, which may or may not be in CU,
12578 except in the case of .debug_types DIEs which do not reference
12579 outside their CU (they do however referencing other types via
12580 DW_FORM_ref_sig8). */
12582 static struct partial_die_info *
12583 find_partial_die (sect_offset offset, struct dwarf2_cu *cu)
12585 struct objfile *objfile = cu->objfile;
12586 struct dwarf2_per_cu_data *per_cu = NULL;
12587 struct partial_die_info *pd = NULL;
12589 if (offset_in_cu_p (&cu->header, offset))
12591 pd = find_partial_die_in_comp_unit (offset, cu);
12594 /* We missed recording what we needed.
12595 Load all dies and try again. */
12596 per_cu = cu->per_cu;
12600 /* TUs don't reference other CUs/TUs (except via type signatures). */
12601 if (cu->per_cu->is_debug_types)
12603 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
12604 " external reference to offset 0x%lx [in module %s].\n"),
12605 (long) cu->header.offset.sect_off, (long) offset.sect_off,
12606 bfd_get_filename (objfile->obfd));
12608 per_cu = dwarf2_find_containing_comp_unit (offset, objfile);
12610 if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL)
12611 load_partial_comp_unit (per_cu);
12613 per_cu->cu->last_used = 0;
12614 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
12617 /* If we didn't find it, and not all dies have been loaded,
12618 load them all and try again. */
12620 if (pd == NULL && per_cu->load_all_dies == 0)
12622 per_cu->load_all_dies = 1;
12624 /* This is nasty. When we reread the DIEs, somewhere up the call chain
12625 THIS_CU->cu may already be in use. So we can't just free it and
12626 replace its DIEs with the ones we read in. Instead, we leave those
12627 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
12628 and clobber THIS_CU->cu->partial_dies with the hash table for the new
12630 load_partial_comp_unit (per_cu);
12632 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
12636 internal_error (__FILE__, __LINE__,
12637 _("could not find partial DIE 0x%x "
12638 "in cache [from module %s]\n"),
12639 offset.sect_off, bfd_get_filename (objfile->obfd));
12643 /* See if we can figure out if the class lives in a namespace. We do
12644 this by looking for a member function; its demangled name will
12645 contain namespace info, if there is any. */
12648 guess_partial_die_structure_name (struct partial_die_info *struct_pdi,
12649 struct dwarf2_cu *cu)
12651 /* NOTE: carlton/2003-10-07: Getting the info this way changes
12652 what template types look like, because the demangler
12653 frequently doesn't give the same name as the debug info. We
12654 could fix this by only using the demangled name to get the
12655 prefix (but see comment in read_structure_type). */
12657 struct partial_die_info *real_pdi;
12658 struct partial_die_info *child_pdi;
12660 /* If this DIE (this DIE's specification, if any) has a parent, then
12661 we should not do this. We'll prepend the parent's fully qualified
12662 name when we create the partial symbol. */
12664 real_pdi = struct_pdi;
12665 while (real_pdi->has_specification)
12666 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
12668 if (real_pdi->die_parent != NULL)
12671 for (child_pdi = struct_pdi->die_child;
12673 child_pdi = child_pdi->die_sibling)
12675 if (child_pdi->tag == DW_TAG_subprogram
12676 && child_pdi->linkage_name != NULL)
12678 char *actual_class_name
12679 = language_class_name_from_physname (cu->language_defn,
12680 child_pdi->linkage_name);
12681 if (actual_class_name != NULL)
12684 = obsavestring (actual_class_name,
12685 strlen (actual_class_name),
12686 &cu->objfile->objfile_obstack);
12687 xfree (actual_class_name);
12694 /* Adjust PART_DIE before generating a symbol for it. This function
12695 may set the is_external flag or change the DIE's name. */
12698 fixup_partial_die (struct partial_die_info *part_die,
12699 struct dwarf2_cu *cu)
12701 /* Once we've fixed up a die, there's no point in doing so again.
12702 This also avoids a memory leak if we were to call
12703 guess_partial_die_structure_name multiple times. */
12704 if (part_die->fixup_called)
12707 /* If we found a reference attribute and the DIE has no name, try
12708 to find a name in the referred to DIE. */
12710 if (part_die->name == NULL && part_die->has_specification)
12712 struct partial_die_info *spec_die;
12714 spec_die = find_partial_die (part_die->spec_offset, cu);
12716 fixup_partial_die (spec_die, cu);
12718 if (spec_die->name)
12720 part_die->name = spec_die->name;
12722 /* Copy DW_AT_external attribute if it is set. */
12723 if (spec_die->is_external)
12724 part_die->is_external = spec_die->is_external;
12728 /* Set default names for some unnamed DIEs. */
12730 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
12731 part_die->name = CP_ANONYMOUS_NAMESPACE_STR;
12733 /* If there is no parent die to provide a namespace, and there are
12734 children, see if we can determine the namespace from their linkage
12736 if (cu->language == language_cplus
12737 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
12738 && part_die->die_parent == NULL
12739 && part_die->has_children
12740 && (part_die->tag == DW_TAG_class_type
12741 || part_die->tag == DW_TAG_structure_type
12742 || part_die->tag == DW_TAG_union_type))
12743 guess_partial_die_structure_name (part_die, cu);
12745 /* GCC might emit a nameless struct or union that has a linkage
12746 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12747 if (part_die->name == NULL
12748 && (part_die->tag == DW_TAG_class_type
12749 || part_die->tag == DW_TAG_interface_type
12750 || part_die->tag == DW_TAG_structure_type
12751 || part_die->tag == DW_TAG_union_type)
12752 && part_die->linkage_name != NULL)
12756 demangled = cplus_demangle (part_die->linkage_name, DMGL_TYPES);
12761 /* Strip any leading namespaces/classes, keep only the base name.
12762 DW_AT_name for named DIEs does not contain the prefixes. */
12763 base = strrchr (demangled, ':');
12764 if (base && base > demangled && base[-1] == ':')
12769 part_die->name = obsavestring (base, strlen (base),
12770 &cu->objfile->objfile_obstack);
12775 part_die->fixup_called = 1;
12778 /* Read an attribute value described by an attribute form. */
12781 read_attribute_value (const struct die_reader_specs *reader,
12782 struct attribute *attr, unsigned form,
12783 gdb_byte *info_ptr)
12785 struct dwarf2_cu *cu = reader->cu;
12786 bfd *abfd = reader->abfd;
12787 struct comp_unit_head *cu_header = &cu->header;
12788 unsigned int bytes_read;
12789 struct dwarf_block *blk;
12794 case DW_FORM_ref_addr:
12795 if (cu->header.version == 2)
12796 DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
12798 DW_UNSND (attr) = read_offset (abfd, info_ptr,
12799 &cu->header, &bytes_read);
12800 info_ptr += bytes_read;
12803 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
12804 info_ptr += bytes_read;
12806 case DW_FORM_block2:
12807 blk = dwarf_alloc_block (cu);
12808 blk->size = read_2_bytes (abfd, info_ptr);
12810 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
12811 info_ptr += blk->size;
12812 DW_BLOCK (attr) = blk;
12814 case DW_FORM_block4:
12815 blk = dwarf_alloc_block (cu);
12816 blk->size = read_4_bytes (abfd, info_ptr);
12818 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
12819 info_ptr += blk->size;
12820 DW_BLOCK (attr) = blk;
12822 case DW_FORM_data2:
12823 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
12826 case DW_FORM_data4:
12827 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
12830 case DW_FORM_data8:
12831 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
12834 case DW_FORM_sec_offset:
12835 DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read);
12836 info_ptr += bytes_read;
12838 case DW_FORM_string:
12839 DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read);
12840 DW_STRING_IS_CANONICAL (attr) = 0;
12841 info_ptr += bytes_read;
12844 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
12846 DW_STRING_IS_CANONICAL (attr) = 0;
12847 info_ptr += bytes_read;
12849 case DW_FORM_exprloc:
12850 case DW_FORM_block:
12851 blk = dwarf_alloc_block (cu);
12852 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
12853 info_ptr += bytes_read;
12854 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
12855 info_ptr += blk->size;
12856 DW_BLOCK (attr) = blk;
12858 case DW_FORM_block1:
12859 blk = dwarf_alloc_block (cu);
12860 blk->size = read_1_byte (abfd, info_ptr);
12862 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
12863 info_ptr += blk->size;
12864 DW_BLOCK (attr) = blk;
12866 case DW_FORM_data1:
12867 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
12871 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
12874 case DW_FORM_flag_present:
12875 DW_UNSND (attr) = 1;
12877 case DW_FORM_sdata:
12878 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
12879 info_ptr += bytes_read;
12881 case DW_FORM_udata:
12882 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
12883 info_ptr += bytes_read;
12886 DW_UNSND (attr) = (cu->header.offset.sect_off
12887 + read_1_byte (abfd, info_ptr));
12891 DW_UNSND (attr) = (cu->header.offset.sect_off
12892 + read_2_bytes (abfd, info_ptr));
12896 DW_UNSND (attr) = (cu->header.offset.sect_off
12897 + read_4_bytes (abfd, info_ptr));
12901 DW_UNSND (attr) = (cu->header.offset.sect_off
12902 + read_8_bytes (abfd, info_ptr));
12905 case DW_FORM_ref_sig8:
12906 /* Convert the signature to something we can record in DW_UNSND
12908 NOTE: This is NULL if the type wasn't found. */
12909 DW_SIGNATURED_TYPE (attr) =
12910 lookup_signatured_type (read_8_bytes (abfd, info_ptr));
12913 case DW_FORM_ref_udata:
12914 DW_UNSND (attr) = (cu->header.offset.sect_off
12915 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
12916 info_ptr += bytes_read;
12918 case DW_FORM_indirect:
12919 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
12920 info_ptr += bytes_read;
12921 info_ptr = read_attribute_value (reader, attr, form, info_ptr);
12923 case DW_FORM_GNU_addr_index:
12924 if (reader->dwo_file == NULL)
12926 /* For now flag a hard error.
12927 Later we can turn this into a complaint. */
12928 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
12929 dwarf_form_name (form),
12930 bfd_get_filename (abfd));
12932 DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read);
12933 info_ptr += bytes_read;
12935 case DW_FORM_GNU_str_index:
12936 if (reader->dwo_file == NULL)
12938 /* For now flag a hard error.
12939 Later we can turn this into a complaint if warranted. */
12940 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
12941 dwarf_form_name (form),
12942 bfd_get_filename (abfd));
12945 ULONGEST str_index =
12946 read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
12948 DW_STRING (attr) = read_str_index (reader, cu, str_index);
12949 DW_STRING_IS_CANONICAL (attr) = 0;
12950 info_ptr += bytes_read;
12954 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
12955 dwarf_form_name (form),
12956 bfd_get_filename (abfd));
12959 /* We have seen instances where the compiler tried to emit a byte
12960 size attribute of -1 which ended up being encoded as an unsigned
12961 0xffffffff. Although 0xffffffff is technically a valid size value,
12962 an object of this size seems pretty unlikely so we can relatively
12963 safely treat these cases as if the size attribute was invalid and
12964 treat them as zero by default. */
12965 if (attr->name == DW_AT_byte_size
12966 && form == DW_FORM_data4
12967 && DW_UNSND (attr) >= 0xffffffff)
12970 (&symfile_complaints,
12971 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
12972 hex_string (DW_UNSND (attr)));
12973 DW_UNSND (attr) = 0;
12979 /* Read an attribute described by an abbreviated attribute. */
12982 read_attribute (const struct die_reader_specs *reader,
12983 struct attribute *attr, struct attr_abbrev *abbrev,
12984 gdb_byte *info_ptr)
12986 attr->name = abbrev->name;
12987 return read_attribute_value (reader, attr, abbrev->form, info_ptr);
12990 /* Read dwarf information from a buffer. */
12992 static unsigned int
12993 read_1_byte (bfd *abfd, gdb_byte *buf)
12995 return bfd_get_8 (abfd, buf);
12999 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
13001 return bfd_get_signed_8 (abfd, buf);
13004 static unsigned int
13005 read_2_bytes (bfd *abfd, gdb_byte *buf)
13007 return bfd_get_16 (abfd, buf);
13011 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
13013 return bfd_get_signed_16 (abfd, buf);
13016 static unsigned int
13017 read_4_bytes (bfd *abfd, gdb_byte *buf)
13019 return bfd_get_32 (abfd, buf);
13023 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
13025 return bfd_get_signed_32 (abfd, buf);
13029 read_8_bytes (bfd *abfd, gdb_byte *buf)
13031 return bfd_get_64 (abfd, buf);
13035 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
13036 unsigned int *bytes_read)
13038 struct comp_unit_head *cu_header = &cu->header;
13039 CORE_ADDR retval = 0;
13041 if (cu_header->signed_addr_p)
13043 switch (cu_header->addr_size)
13046 retval = bfd_get_signed_16 (abfd, buf);
13049 retval = bfd_get_signed_32 (abfd, buf);
13052 retval = bfd_get_signed_64 (abfd, buf);
13055 internal_error (__FILE__, __LINE__,
13056 _("read_address: bad switch, signed [in module %s]"),
13057 bfd_get_filename (abfd));
13062 switch (cu_header->addr_size)
13065 retval = bfd_get_16 (abfd, buf);
13068 retval = bfd_get_32 (abfd, buf);
13071 retval = bfd_get_64 (abfd, buf);
13074 internal_error (__FILE__, __LINE__,
13075 _("read_address: bad switch, "
13076 "unsigned [in module %s]"),
13077 bfd_get_filename (abfd));
13081 *bytes_read = cu_header->addr_size;
13085 /* Read the initial length from a section. The (draft) DWARF 3
13086 specification allows the initial length to take up either 4 bytes
13087 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
13088 bytes describe the length and all offsets will be 8 bytes in length
13091 An older, non-standard 64-bit format is also handled by this
13092 function. The older format in question stores the initial length
13093 as an 8-byte quantity without an escape value. Lengths greater
13094 than 2^32 aren't very common which means that the initial 4 bytes
13095 is almost always zero. Since a length value of zero doesn't make
13096 sense for the 32-bit format, this initial zero can be considered to
13097 be an escape value which indicates the presence of the older 64-bit
13098 format. As written, the code can't detect (old format) lengths
13099 greater than 4GB. If it becomes necessary to handle lengths
13100 somewhat larger than 4GB, we could allow other small values (such
13101 as the non-sensical values of 1, 2, and 3) to also be used as
13102 escape values indicating the presence of the old format.
13104 The value returned via bytes_read should be used to increment the
13105 relevant pointer after calling read_initial_length().
13107 [ Note: read_initial_length() and read_offset() are based on the
13108 document entitled "DWARF Debugging Information Format", revision
13109 3, draft 8, dated November 19, 2001. This document was obtained
13112 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
13114 This document is only a draft and is subject to change. (So beware.)
13116 Details regarding the older, non-standard 64-bit format were
13117 determined empirically by examining 64-bit ELF files produced by
13118 the SGI toolchain on an IRIX 6.5 machine.
13120 - Kevin, July 16, 2002
13124 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
13126 LONGEST length = bfd_get_32 (abfd, buf);
13128 if (length == 0xffffffff)
13130 length = bfd_get_64 (abfd, buf + 4);
13133 else if (length == 0)
13135 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
13136 length = bfd_get_64 (abfd, buf);
13147 /* Cover function for read_initial_length.
13148 Returns the length of the object at BUF, and stores the size of the
13149 initial length in *BYTES_READ and stores the size that offsets will be in
13151 If the initial length size is not equivalent to that specified in
13152 CU_HEADER then issue a complaint.
13153 This is useful when reading non-comp-unit headers. */
13156 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
13157 const struct comp_unit_head *cu_header,
13158 unsigned int *bytes_read,
13159 unsigned int *offset_size)
13161 LONGEST length = read_initial_length (abfd, buf, bytes_read);
13163 gdb_assert (cu_header->initial_length_size == 4
13164 || cu_header->initial_length_size == 8
13165 || cu_header->initial_length_size == 12);
13167 if (cu_header->initial_length_size != *bytes_read)
13168 complaint (&symfile_complaints,
13169 _("intermixed 32-bit and 64-bit DWARF sections"));
13171 *offset_size = (*bytes_read == 4) ? 4 : 8;
13175 /* Read an offset from the data stream. The size of the offset is
13176 given by cu_header->offset_size. */
13179 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
13180 unsigned int *bytes_read)
13182 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
13184 *bytes_read = cu_header->offset_size;
13188 /* Read an offset from the data stream. */
13191 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
13193 LONGEST retval = 0;
13195 switch (offset_size)
13198 retval = bfd_get_32 (abfd, buf);
13201 retval = bfd_get_64 (abfd, buf);
13204 internal_error (__FILE__, __LINE__,
13205 _("read_offset_1: bad switch [in module %s]"),
13206 bfd_get_filename (abfd));
13213 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
13215 /* If the size of a host char is 8 bits, we can return a pointer
13216 to the buffer, otherwise we have to copy the data to a buffer
13217 allocated on the temporary obstack. */
13218 gdb_assert (HOST_CHAR_BIT == 8);
13223 read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
13225 /* If the size of a host char is 8 bits, we can return a pointer
13226 to the string, otherwise we have to copy the string to a buffer
13227 allocated on the temporary obstack. */
13228 gdb_assert (HOST_CHAR_BIT == 8);
13231 *bytes_read_ptr = 1;
13234 *bytes_read_ptr = strlen ((char *) buf) + 1;
13235 return (char *) buf;
13239 read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset)
13241 dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str);
13242 if (dwarf2_per_objfile->str.buffer == NULL)
13243 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
13244 bfd_get_filename (abfd));
13245 if (str_offset >= dwarf2_per_objfile->str.size)
13246 error (_("DW_FORM_strp pointing outside of "
13247 ".debug_str section [in module %s]"),
13248 bfd_get_filename (abfd));
13249 gdb_assert (HOST_CHAR_BIT == 8);
13250 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
13252 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
13256 read_indirect_string (bfd *abfd, gdb_byte *buf,
13257 const struct comp_unit_head *cu_header,
13258 unsigned int *bytes_read_ptr)
13260 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
13262 return read_indirect_string_at_offset (abfd, str_offset);
13266 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
13269 unsigned int num_read;
13271 unsigned char byte;
13279 byte = bfd_get_8 (abfd, buf);
13282 result |= ((ULONGEST) (byte & 127) << shift);
13283 if ((byte & 128) == 0)
13289 *bytes_read_ptr = num_read;
13294 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
13297 int i, shift, num_read;
13298 unsigned char byte;
13306 byte = bfd_get_8 (abfd, buf);
13309 result |= ((LONGEST) (byte & 127) << shift);
13311 if ((byte & 128) == 0)
13316 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
13317 result |= -(((LONGEST) 1) << shift);
13318 *bytes_read_ptr = num_read;
13322 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
13323 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
13324 ADDR_SIZE is the size of addresses from the CU header. */
13327 read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size)
13329 struct objfile *objfile = dwarf2_per_objfile->objfile;
13330 bfd *abfd = objfile->obfd;
13331 const gdb_byte *info_ptr;
13333 dwarf2_read_section (objfile, &dwarf2_per_objfile->addr);
13334 if (dwarf2_per_objfile->addr.buffer == NULL)
13335 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
13337 if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size)
13338 error (_("DW_FORM_addr_index pointing outside of "
13339 ".debug_addr section [in module %s]"),
13341 info_ptr = (dwarf2_per_objfile->addr.buffer
13342 + addr_base + addr_index * addr_size);
13343 if (addr_size == 4)
13344 return bfd_get_32 (abfd, info_ptr);
13346 return bfd_get_64 (abfd, info_ptr);
13349 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
13352 read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index)
13354 return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size);
13357 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
13360 read_addr_index_from_leb128 (struct dwarf2_cu *cu, gdb_byte *info_ptr,
13361 unsigned int *bytes_read)
13363 bfd *abfd = cu->objfile->obfd;
13364 unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
13366 return read_addr_index (cu, addr_index);
13369 /* Data structure to pass results from dwarf2_read_addr_index_reader
13370 back to dwarf2_read_addr_index. */
13372 struct dwarf2_read_addr_index_data
13374 ULONGEST addr_base;
13378 /* die_reader_func for dwarf2_read_addr_index. */
13381 dwarf2_read_addr_index_reader (const struct die_reader_specs *reader,
13382 gdb_byte *info_ptr,
13383 struct die_info *comp_unit_die,
13387 struct dwarf2_cu *cu = reader->cu;
13388 struct dwarf2_read_addr_index_data *aidata =
13389 (struct dwarf2_read_addr_index_data *) data;
13391 aidata->addr_base = cu->addr_base;
13392 aidata->addr_size = cu->header.addr_size;
13395 /* Given an index in .debug_addr, fetch the value.
13396 NOTE: This can be called during dwarf expression evaluation,
13397 long after the debug information has been read, and thus per_cu->cu
13398 may no longer exist. */
13401 dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu,
13402 unsigned int addr_index)
13404 struct objfile *objfile = per_cu->objfile;
13405 struct dwarf2_cu *cu = per_cu->cu;
13406 ULONGEST addr_base;
13409 /* This is intended to be called from outside this file. */
13410 dw2_setup (objfile);
13412 /* We need addr_base and addr_size.
13413 If we don't have PER_CU->cu, we have to get it.
13414 Nasty, but the alternative is storing the needed info in PER_CU,
13415 which at this point doesn't seem justified: it's not clear how frequently
13416 it would get used and it would increase the size of every PER_CU.
13417 Entry points like dwarf2_per_cu_addr_size do a similar thing
13418 so we're not in uncharted territory here.
13419 Alas we need to be a bit more complicated as addr_base is contained
13422 We don't need to read the entire CU(/TU).
13423 We just need the header and top level die.
13424 IWBN to use the aging mechanism to let us lazily later discard the CU.
13425 See however init_cutu_and_read_dies_simple. */
13429 addr_base = cu->addr_base;
13430 addr_size = cu->header.addr_size;
13434 struct dwarf2_read_addr_index_data aidata;
13436 init_cutu_and_read_dies_simple (per_cu, dwarf2_read_addr_index_reader,
13438 addr_base = aidata.addr_base;
13439 addr_size = aidata.addr_size;
13442 return read_addr_index_1 (addr_index, addr_base, addr_size);
13445 /* Given a DW_AT_str_index, fetch the string. */
13448 read_str_index (const struct die_reader_specs *reader,
13449 struct dwarf2_cu *cu, ULONGEST str_index)
13451 struct objfile *objfile = dwarf2_per_objfile->objfile;
13452 const char *dwo_name = objfile->name;
13453 bfd *abfd = objfile->obfd;
13454 struct dwo_sections *sections = &reader->dwo_file->sections;
13455 gdb_byte *info_ptr;
13456 ULONGEST str_offset;
13458 dwarf2_read_section (objfile, §ions->str);
13459 dwarf2_read_section (objfile, §ions->str_offsets);
13460 if (sections->str.buffer == NULL)
13461 error (_("DW_FORM_str_index used without .debug_str.dwo section"
13462 " in CU at offset 0x%lx [in module %s]"),
13463 (long) cu->header.offset.sect_off, dwo_name);
13464 if (sections->str_offsets.buffer == NULL)
13465 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
13466 " in CU at offset 0x%lx [in module %s]"),
13467 (long) cu->header.offset.sect_off, dwo_name);
13468 if (str_index * cu->header.offset_size >= sections->str_offsets.size)
13469 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
13470 " section in CU at offset 0x%lx [in module %s]"),
13471 (long) cu->header.offset.sect_off, dwo_name);
13472 info_ptr = (sections->str_offsets.buffer
13473 + str_index * cu->header.offset_size);
13474 if (cu->header.offset_size == 4)
13475 str_offset = bfd_get_32 (abfd, info_ptr);
13477 str_offset = bfd_get_64 (abfd, info_ptr);
13478 if (str_offset >= sections->str.size)
13479 error (_("Offset from DW_FORM_str_index pointing outside of"
13480 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
13481 (long) cu->header.offset.sect_off, dwo_name);
13482 return (char *) (sections->str.buffer + str_offset);
13485 /* Return the length of an LEB128 number in BUF. */
13488 leb128_size (const gdb_byte *buf)
13490 const gdb_byte *begin = buf;
13496 if ((byte & 128) == 0)
13497 return buf - begin;
13502 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
13509 cu->language = language_c;
13511 case DW_LANG_C_plus_plus:
13512 cu->language = language_cplus;
13515 cu->language = language_d;
13517 case DW_LANG_Fortran77:
13518 case DW_LANG_Fortran90:
13519 case DW_LANG_Fortran95:
13520 cu->language = language_fortran;
13523 cu->language = language_go;
13525 case DW_LANG_Mips_Assembler:
13526 cu->language = language_asm;
13529 cu->language = language_java;
13531 case DW_LANG_Ada83:
13532 case DW_LANG_Ada95:
13533 cu->language = language_ada;
13535 case DW_LANG_Modula2:
13536 cu->language = language_m2;
13538 case DW_LANG_Pascal83:
13539 cu->language = language_pascal;
13542 cu->language = language_objc;
13544 case DW_LANG_Cobol74:
13545 case DW_LANG_Cobol85:
13547 cu->language = language_minimal;
13550 cu->language_defn = language_def (cu->language);
13553 /* Return the named attribute or NULL if not there. */
13555 static struct attribute *
13556 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
13561 struct attribute *spec = NULL;
13563 for (i = 0; i < die->num_attrs; ++i)
13565 if (die->attrs[i].name == name)
13566 return &die->attrs[i];
13567 if (die->attrs[i].name == DW_AT_specification
13568 || die->attrs[i].name == DW_AT_abstract_origin)
13569 spec = &die->attrs[i];
13575 die = follow_die_ref (die, spec, &cu);
13581 /* Return the named attribute or NULL if not there,
13582 but do not follow DW_AT_specification, etc.
13583 This is for use in contexts where we're reading .debug_types dies.
13584 Following DW_AT_specification, DW_AT_abstract_origin will take us
13585 back up the chain, and we want to go down. */
13587 static struct attribute *
13588 dwarf2_attr_no_follow (struct die_info *die, unsigned int name)
13592 for (i = 0; i < die->num_attrs; ++i)
13593 if (die->attrs[i].name == name)
13594 return &die->attrs[i];
13599 /* Return non-zero iff the attribute NAME is defined for the given DIE,
13600 and holds a non-zero value. This function should only be used for
13601 DW_FORM_flag or DW_FORM_flag_present attributes. */
13604 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
13606 struct attribute *attr = dwarf2_attr (die, name, cu);
13608 return (attr && DW_UNSND (attr));
13612 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
13614 /* A DIE is a declaration if it has a DW_AT_declaration attribute
13615 which value is non-zero. However, we have to be careful with
13616 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
13617 (via dwarf2_flag_true_p) follows this attribute. So we may
13618 end up accidently finding a declaration attribute that belongs
13619 to a different DIE referenced by the specification attribute,
13620 even though the given DIE does not have a declaration attribute. */
13621 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
13622 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
13625 /* Return the die giving the specification for DIE, if there is
13626 one. *SPEC_CU is the CU containing DIE on input, and the CU
13627 containing the return value on output. If there is no
13628 specification, but there is an abstract origin, that is
13631 static struct die_info *
13632 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
13634 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
13637 if (spec_attr == NULL)
13638 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
13640 if (spec_attr == NULL)
13643 return follow_die_ref (die, spec_attr, spec_cu);
13646 /* Free the line_header structure *LH, and any arrays and strings it
13648 NOTE: This is also used as a "cleanup" function. */
13651 free_line_header (struct line_header *lh)
13653 if (lh->standard_opcode_lengths)
13654 xfree (lh->standard_opcode_lengths);
13656 /* Remember that all the lh->file_names[i].name pointers are
13657 pointers into debug_line_buffer, and don't need to be freed. */
13658 if (lh->file_names)
13659 xfree (lh->file_names);
13661 /* Similarly for the include directory names. */
13662 if (lh->include_dirs)
13663 xfree (lh->include_dirs);
13668 /* Add an entry to LH's include directory table. */
13671 add_include_dir (struct line_header *lh, char *include_dir)
13673 /* Grow the array if necessary. */
13674 if (lh->include_dirs_size == 0)
13676 lh->include_dirs_size = 1; /* for testing */
13677 lh->include_dirs = xmalloc (lh->include_dirs_size
13678 * sizeof (*lh->include_dirs));
13680 else if (lh->num_include_dirs >= lh->include_dirs_size)
13682 lh->include_dirs_size *= 2;
13683 lh->include_dirs = xrealloc (lh->include_dirs,
13684 (lh->include_dirs_size
13685 * sizeof (*lh->include_dirs)));
13688 lh->include_dirs[lh->num_include_dirs++] = include_dir;
13691 /* Add an entry to LH's file name table. */
13694 add_file_name (struct line_header *lh,
13696 unsigned int dir_index,
13697 unsigned int mod_time,
13698 unsigned int length)
13700 struct file_entry *fe;
13702 /* Grow the array if necessary. */
13703 if (lh->file_names_size == 0)
13705 lh->file_names_size = 1; /* for testing */
13706 lh->file_names = xmalloc (lh->file_names_size
13707 * sizeof (*lh->file_names));
13709 else if (lh->num_file_names >= lh->file_names_size)
13711 lh->file_names_size *= 2;
13712 lh->file_names = xrealloc (lh->file_names,
13713 (lh->file_names_size
13714 * sizeof (*lh->file_names)));
13717 fe = &lh->file_names[lh->num_file_names++];
13719 fe->dir_index = dir_index;
13720 fe->mod_time = mod_time;
13721 fe->length = length;
13722 fe->included_p = 0;
13726 /* Read the statement program header starting at OFFSET in
13727 .debug_line, or .debug_line.dwo. Return a pointer
13728 to a struct line_header, allocated using xmalloc.
13730 NOTE: the strings in the include directory and file name tables of
13731 the returned object point into the dwarf line section buffer,
13732 and must not be freed. */
13734 static struct line_header *
13735 dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu)
13737 struct cleanup *back_to;
13738 struct line_header *lh;
13739 gdb_byte *line_ptr;
13740 unsigned int bytes_read, offset_size;
13742 char *cur_dir, *cur_file;
13743 struct dwarf2_section_info *section;
13746 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
13748 if (cu->dwo_unit && cu->per_cu->is_debug_types)
13749 section = &cu->dwo_unit->dwo_file->sections.line;
13751 section = &dwarf2_per_objfile->line;
13753 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
13754 if (section->buffer == NULL)
13756 if (cu->dwo_unit && cu->per_cu->is_debug_types)
13757 complaint (&symfile_complaints, _("missing .debug_line.dwo section"));
13759 complaint (&symfile_complaints, _("missing .debug_line section"));
13763 /* We can't do this until we know the section is non-empty.
13764 Only then do we know we have such a section. */
13765 abfd = section->asection->owner;
13767 /* Make sure that at least there's room for the total_length field.
13768 That could be 12 bytes long, but we're just going to fudge that. */
13769 if (offset + 4 >= section->size)
13771 dwarf2_statement_list_fits_in_line_number_section_complaint ();
13775 lh = xmalloc (sizeof (*lh));
13776 memset (lh, 0, sizeof (*lh));
13777 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
13780 line_ptr = section->buffer + offset;
13782 /* Read in the header. */
13784 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
13785 &bytes_read, &offset_size);
13786 line_ptr += bytes_read;
13787 if (line_ptr + lh->total_length > (section->buffer + section->size))
13789 dwarf2_statement_list_fits_in_line_number_section_complaint ();
13792 lh->statement_program_end = line_ptr + lh->total_length;
13793 lh->version = read_2_bytes (abfd, line_ptr);
13795 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
13796 line_ptr += offset_size;
13797 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
13799 if (lh->version >= 4)
13801 lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr);
13805 lh->maximum_ops_per_instruction = 1;
13807 if (lh->maximum_ops_per_instruction == 0)
13809 lh->maximum_ops_per_instruction = 1;
13810 complaint (&symfile_complaints,
13811 _("invalid maximum_ops_per_instruction "
13812 "in `.debug_line' section"));
13815 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
13817 lh->line_base = read_1_signed_byte (abfd, line_ptr);
13819 lh->line_range = read_1_byte (abfd, line_ptr);
13821 lh->opcode_base = read_1_byte (abfd, line_ptr);
13823 lh->standard_opcode_lengths
13824 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
13826 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
13827 for (i = 1; i < lh->opcode_base; ++i)
13829 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
13833 /* Read directory table. */
13834 while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
13836 line_ptr += bytes_read;
13837 add_include_dir (lh, cur_dir);
13839 line_ptr += bytes_read;
13841 /* Read file name table. */
13842 while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL)
13844 unsigned int dir_index, mod_time, length;
13846 line_ptr += bytes_read;
13847 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
13848 line_ptr += bytes_read;
13849 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
13850 line_ptr += bytes_read;
13851 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
13852 line_ptr += bytes_read;
13854 add_file_name (lh, cur_file, dir_index, mod_time, length);
13856 line_ptr += bytes_read;
13857 lh->statement_program_start = line_ptr;
13859 if (line_ptr > (section->buffer + section->size))
13860 complaint (&symfile_complaints,
13861 _("line number info header doesn't "
13862 "fit in `.debug_line' section"));
13864 discard_cleanups (back_to);
13868 /* Subroutine of dwarf_decode_lines to simplify it.
13869 Return the file name of the psymtab for included file FILE_INDEX
13870 in line header LH of PST.
13871 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
13872 If space for the result is malloc'd, it will be freed by a cleanup.
13873 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
13876 psymtab_include_file_name (const struct line_header *lh, int file_index,
13877 const struct partial_symtab *pst,
13878 const char *comp_dir)
13880 const struct file_entry fe = lh->file_names [file_index];
13881 char *include_name = fe.name;
13882 char *include_name_to_compare = include_name;
13883 char *dir_name = NULL;
13884 const char *pst_filename;
13885 char *copied_name = NULL;
13889 dir_name = lh->include_dirs[fe.dir_index - 1];
13891 if (!IS_ABSOLUTE_PATH (include_name)
13892 && (dir_name != NULL || comp_dir != NULL))
13894 /* Avoid creating a duplicate psymtab for PST.
13895 We do this by comparing INCLUDE_NAME and PST_FILENAME.
13896 Before we do the comparison, however, we need to account
13897 for DIR_NAME and COMP_DIR.
13898 First prepend dir_name (if non-NULL). If we still don't
13899 have an absolute path prepend comp_dir (if non-NULL).
13900 However, the directory we record in the include-file's
13901 psymtab does not contain COMP_DIR (to match the
13902 corresponding symtab(s)).
13907 bash$ gcc -g ./hello.c
13908 include_name = "hello.c"
13910 DW_AT_comp_dir = comp_dir = "/tmp"
13911 DW_AT_name = "./hello.c" */
13913 if (dir_name != NULL)
13915 include_name = concat (dir_name, SLASH_STRING,
13916 include_name, (char *)NULL);
13917 include_name_to_compare = include_name;
13918 make_cleanup (xfree, include_name);
13920 if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL)
13922 include_name_to_compare = concat (comp_dir, SLASH_STRING,
13923 include_name, (char *)NULL);
13927 pst_filename = pst->filename;
13928 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
13930 copied_name = concat (pst->dirname, SLASH_STRING,
13931 pst_filename, (char *)NULL);
13932 pst_filename = copied_name;
13935 file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0;
13937 if (include_name_to_compare != include_name)
13938 xfree (include_name_to_compare);
13939 if (copied_name != NULL)
13940 xfree (copied_name);
13944 return include_name;
13947 /* Ignore this record_line request. */
13950 noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc)
13955 /* Subroutine of dwarf_decode_lines to simplify it.
13956 Process the line number information in LH. */
13959 dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir,
13960 struct dwarf2_cu *cu, struct partial_symtab *pst)
13962 gdb_byte *line_ptr, *extended_end;
13963 gdb_byte *line_end;
13964 unsigned int bytes_read, extended_len;
13965 unsigned char op_code, extended_op, adj_opcode;
13966 CORE_ADDR baseaddr;
13967 struct objfile *objfile = cu->objfile;
13968 bfd *abfd = objfile->obfd;
13969 struct gdbarch *gdbarch = get_objfile_arch (objfile);
13970 const int decode_for_pst_p = (pst != NULL);
13971 struct subfile *last_subfile = NULL;
13972 void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc)
13975 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
13977 line_ptr = lh->statement_program_start;
13978 line_end = lh->statement_program_end;
13980 /* Read the statement sequences until there's nothing left. */
13981 while (line_ptr < line_end)
13983 /* state machine registers */
13984 CORE_ADDR address = 0;
13985 unsigned int file = 1;
13986 unsigned int line = 1;
13987 unsigned int column = 0;
13988 int is_stmt = lh->default_is_stmt;
13989 int basic_block = 0;
13990 int end_sequence = 0;
13992 unsigned char op_index = 0;
13994 if (!decode_for_pst_p && lh->num_file_names >= file)
13996 /* Start a subfile for the current file of the state machine. */
13997 /* lh->include_dirs and lh->file_names are 0-based, but the
13998 directory and file name numbers in the statement program
14000 struct file_entry *fe = &lh->file_names[file - 1];
14004 dir = lh->include_dirs[fe->dir_index - 1];
14006 dwarf2_start_subfile (fe->name, dir, comp_dir);
14009 /* Decode the table. */
14010 while (!end_sequence)
14012 op_code = read_1_byte (abfd, line_ptr);
14014 if (line_ptr > line_end)
14016 dwarf2_debug_line_missing_end_sequence_complaint ();
14020 if (op_code >= lh->opcode_base)
14022 /* Special operand. */
14023 adj_opcode = op_code - lh->opcode_base;
14024 address += (((op_index + (adj_opcode / lh->line_range))
14025 / lh->maximum_ops_per_instruction)
14026 * lh->minimum_instruction_length);
14027 op_index = ((op_index + (adj_opcode / lh->line_range))
14028 % lh->maximum_ops_per_instruction);
14029 line += lh->line_base + (adj_opcode % lh->line_range);
14030 if (lh->num_file_names < file || file == 0)
14031 dwarf2_debug_line_missing_file_complaint ();
14032 /* For now we ignore lines not starting on an
14033 instruction boundary. */
14034 else if (op_index == 0)
14036 lh->file_names[file - 1].included_p = 1;
14037 if (!decode_for_pst_p && is_stmt)
14039 if (last_subfile != current_subfile)
14041 addr = gdbarch_addr_bits_remove (gdbarch, address);
14043 (*p_record_line) (last_subfile, 0, addr);
14044 last_subfile = current_subfile;
14046 /* Append row to matrix using current values. */
14047 addr = gdbarch_addr_bits_remove (gdbarch, address);
14048 (*p_record_line) (current_subfile, line, addr);
14053 else switch (op_code)
14055 case DW_LNS_extended_op:
14056 extended_len = read_unsigned_leb128 (abfd, line_ptr,
14058 line_ptr += bytes_read;
14059 extended_end = line_ptr + extended_len;
14060 extended_op = read_1_byte (abfd, line_ptr);
14062 switch (extended_op)
14064 case DW_LNE_end_sequence:
14065 p_record_line = record_line;
14068 case DW_LNE_set_address:
14069 address = read_address (abfd, line_ptr, cu, &bytes_read);
14071 if (address == 0 && !dwarf2_per_objfile->has_section_at_zero)
14073 /* This line table is for a function which has been
14074 GCd by the linker. Ignore it. PR gdb/12528 */
14077 = line_ptr - dwarf2_per_objfile->line.buffer;
14079 complaint (&symfile_complaints,
14080 _(".debug_line address at offset 0x%lx is 0 "
14082 line_offset, objfile->name);
14083 p_record_line = noop_record_line;
14087 line_ptr += bytes_read;
14088 address += baseaddr;
14090 case DW_LNE_define_file:
14093 unsigned int dir_index, mod_time, length;
14095 cur_file = read_direct_string (abfd, line_ptr,
14097 line_ptr += bytes_read;
14099 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
14100 line_ptr += bytes_read;
14102 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
14103 line_ptr += bytes_read;
14105 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
14106 line_ptr += bytes_read;
14107 add_file_name (lh, cur_file, dir_index, mod_time, length);
14110 case DW_LNE_set_discriminator:
14111 /* The discriminator is not interesting to the debugger;
14113 line_ptr = extended_end;
14116 complaint (&symfile_complaints,
14117 _("mangled .debug_line section"));
14120 /* Make sure that we parsed the extended op correctly. If e.g.
14121 we expected a different address size than the producer used,
14122 we may have read the wrong number of bytes. */
14123 if (line_ptr != extended_end)
14125 complaint (&symfile_complaints,
14126 _("mangled .debug_line section"));
14131 if (lh->num_file_names < file || file == 0)
14132 dwarf2_debug_line_missing_file_complaint ();
14135 lh->file_names[file - 1].included_p = 1;
14136 if (!decode_for_pst_p && is_stmt)
14138 if (last_subfile != current_subfile)
14140 addr = gdbarch_addr_bits_remove (gdbarch, address);
14142 (*p_record_line) (last_subfile, 0, addr);
14143 last_subfile = current_subfile;
14145 addr = gdbarch_addr_bits_remove (gdbarch, address);
14146 (*p_record_line) (current_subfile, line, addr);
14151 case DW_LNS_advance_pc:
14154 = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
14156 address += (((op_index + adjust)
14157 / lh->maximum_ops_per_instruction)
14158 * lh->minimum_instruction_length);
14159 op_index = ((op_index + adjust)
14160 % lh->maximum_ops_per_instruction);
14161 line_ptr += bytes_read;
14164 case DW_LNS_advance_line:
14165 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
14166 line_ptr += bytes_read;
14168 case DW_LNS_set_file:
14170 /* The arrays lh->include_dirs and lh->file_names are
14171 0-based, but the directory and file name numbers in
14172 the statement program are 1-based. */
14173 struct file_entry *fe;
14176 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
14177 line_ptr += bytes_read;
14178 if (lh->num_file_names < file || file == 0)
14179 dwarf2_debug_line_missing_file_complaint ();
14182 fe = &lh->file_names[file - 1];
14184 dir = lh->include_dirs[fe->dir_index - 1];
14185 if (!decode_for_pst_p)
14187 last_subfile = current_subfile;
14188 dwarf2_start_subfile (fe->name, dir, comp_dir);
14193 case DW_LNS_set_column:
14194 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
14195 line_ptr += bytes_read;
14197 case DW_LNS_negate_stmt:
14198 is_stmt = (!is_stmt);
14200 case DW_LNS_set_basic_block:
14203 /* Add to the address register of the state machine the
14204 address increment value corresponding to special opcode
14205 255. I.e., this value is scaled by the minimum
14206 instruction length since special opcode 255 would have
14207 scaled the increment. */
14208 case DW_LNS_const_add_pc:
14210 CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range;
14212 address += (((op_index + adjust)
14213 / lh->maximum_ops_per_instruction)
14214 * lh->minimum_instruction_length);
14215 op_index = ((op_index + adjust)
14216 % lh->maximum_ops_per_instruction);
14219 case DW_LNS_fixed_advance_pc:
14220 address += read_2_bytes (abfd, line_ptr);
14226 /* Unknown standard opcode, ignore it. */
14229 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
14231 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
14232 line_ptr += bytes_read;
14237 if (lh->num_file_names < file || file == 0)
14238 dwarf2_debug_line_missing_file_complaint ();
14241 lh->file_names[file - 1].included_p = 1;
14242 if (!decode_for_pst_p)
14244 addr = gdbarch_addr_bits_remove (gdbarch, address);
14245 (*p_record_line) (current_subfile, 0, addr);
14251 /* Decode the Line Number Program (LNP) for the given line_header
14252 structure and CU. The actual information extracted and the type
14253 of structures created from the LNP depends on the value of PST.
14255 1. If PST is NULL, then this procedure uses the data from the program
14256 to create all necessary symbol tables, and their linetables.
14258 2. If PST is not NULL, this procedure reads the program to determine
14259 the list of files included by the unit represented by PST, and
14260 builds all the associated partial symbol tables.
14262 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
14263 It is used for relative paths in the line table.
14264 NOTE: When processing partial symtabs (pst != NULL),
14265 comp_dir == pst->dirname.
14267 NOTE: It is important that psymtabs have the same file name (via strcmp)
14268 as the corresponding symtab. Since COMP_DIR is not used in the name of the
14269 symtab we don't use it in the name of the psymtabs we create.
14270 E.g. expand_line_sal requires this when finding psymtabs to expand.
14271 A good testcase for this is mb-inline.exp. */
14274 dwarf_decode_lines (struct line_header *lh, const char *comp_dir,
14275 struct dwarf2_cu *cu, struct partial_symtab *pst,
14276 int want_line_info)
14278 struct objfile *objfile = cu->objfile;
14279 const int decode_for_pst_p = (pst != NULL);
14280 struct subfile *first_subfile = current_subfile;
14282 if (want_line_info)
14283 dwarf_decode_lines_1 (lh, comp_dir, cu, pst);
14285 if (decode_for_pst_p)
14289 /* Now that we're done scanning the Line Header Program, we can
14290 create the psymtab of each included file. */
14291 for (file_index = 0; file_index < lh->num_file_names; file_index++)
14292 if (lh->file_names[file_index].included_p == 1)
14294 char *include_name =
14295 psymtab_include_file_name (lh, file_index, pst, comp_dir);
14296 if (include_name != NULL)
14297 dwarf2_create_include_psymtab (include_name, pst, objfile);
14302 /* Make sure a symtab is created for every file, even files
14303 which contain only variables (i.e. no code with associated
14307 for (i = 0; i < lh->num_file_names; i++)
14310 struct file_entry *fe;
14312 fe = &lh->file_names[i];
14314 dir = lh->include_dirs[fe->dir_index - 1];
14315 dwarf2_start_subfile (fe->name, dir, comp_dir);
14317 /* Skip the main file; we don't need it, and it must be
14318 allocated last, so that it will show up before the
14319 non-primary symtabs in the objfile's symtab list. */
14320 if (current_subfile == first_subfile)
14323 if (current_subfile->symtab == NULL)
14324 current_subfile->symtab = allocate_symtab (current_subfile->name,
14326 fe->symtab = current_subfile->symtab;
14331 /* Start a subfile for DWARF. FILENAME is the name of the file and
14332 DIRNAME the name of the source directory which contains FILENAME
14333 or NULL if not known. COMP_DIR is the compilation directory for the
14334 linetable's compilation unit or NULL if not known.
14335 This routine tries to keep line numbers from identical absolute and
14336 relative file names in a common subfile.
14338 Using the `list' example from the GDB testsuite, which resides in
14339 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
14340 of /srcdir/list0.c yields the following debugging information for list0.c:
14342 DW_AT_name: /srcdir/list0.c
14343 DW_AT_comp_dir: /compdir
14344 files.files[0].name: list0.h
14345 files.files[0].dir: /srcdir
14346 files.files[1].name: list0.c
14347 files.files[1].dir: /srcdir
14349 The line number information for list0.c has to end up in a single
14350 subfile, so that `break /srcdir/list0.c:1' works as expected.
14351 start_subfile will ensure that this happens provided that we pass the
14352 concatenation of files.files[1].dir and files.files[1].name as the
14356 dwarf2_start_subfile (char *filename, const char *dirname,
14357 const char *comp_dir)
14361 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
14362 `start_symtab' will always pass the contents of DW_AT_comp_dir as
14363 second argument to start_subfile. To be consistent, we do the
14364 same here. In order not to lose the line information directory,
14365 we concatenate it to the filename when it makes sense.
14366 Note that the Dwarf3 standard says (speaking of filenames in line
14367 information): ``The directory index is ignored for file names
14368 that represent full path names''. Thus ignoring dirname in the
14369 `else' branch below isn't an issue. */
14371 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
14372 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
14374 fullname = filename;
14376 start_subfile (fullname, comp_dir);
14378 if (fullname != filename)
14382 /* Start a symtab for DWARF.
14383 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
14386 dwarf2_start_symtab (struct dwarf2_cu *cu,
14387 char *name, char *comp_dir, CORE_ADDR low_pc)
14389 start_symtab (name, comp_dir, low_pc);
14390 record_debugformat ("DWARF 2");
14391 record_producer (cu->producer);
14393 /* We assume that we're processing GCC output. */
14394 processing_gcc_compilation = 2;
14396 processing_has_namespace_info = 0;
14400 var_decode_location (struct attribute *attr, struct symbol *sym,
14401 struct dwarf2_cu *cu)
14403 struct objfile *objfile = cu->objfile;
14404 struct comp_unit_head *cu_header = &cu->header;
14406 /* NOTE drow/2003-01-30: There used to be a comment and some special
14407 code here to turn a symbol with DW_AT_external and a
14408 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
14409 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
14410 with some versions of binutils) where shared libraries could have
14411 relocations against symbols in their debug information - the
14412 minimal symbol would have the right address, but the debug info
14413 would not. It's no longer necessary, because we will explicitly
14414 apply relocations when we read in the debug information now. */
14416 /* A DW_AT_location attribute with no contents indicates that a
14417 variable has been optimized away. */
14418 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
14420 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
14424 /* Handle one degenerate form of location expression specially, to
14425 preserve GDB's previous behavior when section offsets are
14426 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
14427 then mark this symbol as LOC_STATIC. */
14429 if (attr_form_is_block (attr)
14430 && ((DW_BLOCK (attr)->data[0] == DW_OP_addr
14431 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size)
14432 || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index
14433 && (DW_BLOCK (attr)->size
14434 == 1 + leb128_size (&DW_BLOCK (attr)->data[1])))))
14436 unsigned int dummy;
14438 if (DW_BLOCK (attr)->data[0] == DW_OP_addr)
14439 SYMBOL_VALUE_ADDRESS (sym) =
14440 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
14442 SYMBOL_VALUE_ADDRESS (sym) =
14443 read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy);
14444 SYMBOL_CLASS (sym) = LOC_STATIC;
14445 fixup_symbol_section (sym, objfile);
14446 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
14447 SYMBOL_SECTION (sym));
14451 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
14452 expression evaluator, and use LOC_COMPUTED only when necessary
14453 (i.e. when the value of a register or memory location is
14454 referenced, or a thread-local block, etc.). Then again, it might
14455 not be worthwhile. I'm assuming that it isn't unless performance
14456 or memory numbers show me otherwise. */
14458 dwarf2_symbol_mark_computed (attr, sym, cu);
14459 SYMBOL_CLASS (sym) = LOC_COMPUTED;
14461 if (SYMBOL_COMPUTED_OPS (sym) == &dwarf2_loclist_funcs)
14462 cu->has_loclist = 1;
14465 /* Given a pointer to a DWARF information entry, figure out if we need
14466 to make a symbol table entry for it, and if so, create a new entry
14467 and return a pointer to it.
14468 If TYPE is NULL, determine symbol type from the die, otherwise
14469 used the passed type.
14470 If SPACE is not NULL, use it to hold the new symbol. If it is
14471 NULL, allocate a new symbol on the objfile's obstack. */
14473 static struct symbol *
14474 new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
14475 struct symbol *space)
14477 struct objfile *objfile = cu->objfile;
14478 struct symbol *sym = NULL;
14480 struct attribute *attr = NULL;
14481 struct attribute *attr2 = NULL;
14482 CORE_ADDR baseaddr;
14483 struct pending **list_to_add = NULL;
14485 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
14487 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
14489 name = dwarf2_name (die, cu);
14492 const char *linkagename;
14493 int suppress_add = 0;
14498 sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
14499 OBJSTAT (objfile, n_syms++);
14501 /* Cache this symbol's name and the name's demangled form (if any). */
14502 SYMBOL_SET_LANGUAGE (sym, cu->language);
14503 linkagename = dwarf2_physname (name, die, cu);
14504 SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile);
14506 /* Fortran does not have mangling standard and the mangling does differ
14507 between gfortran, iFort etc. */
14508 if (cu->language == language_fortran
14509 && symbol_get_demangled_name (&(sym->ginfo)) == NULL)
14510 symbol_set_demangled_name (&(sym->ginfo),
14511 (char *) dwarf2_full_name (name, die, cu),
14514 /* Default assumptions.
14515 Use the passed type or decode it from the die. */
14516 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
14517 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
14519 SYMBOL_TYPE (sym) = type;
14521 SYMBOL_TYPE (sym) = die_type (die, cu);
14522 attr = dwarf2_attr (die,
14523 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
14527 SYMBOL_LINE (sym) = DW_UNSND (attr);
14530 attr = dwarf2_attr (die,
14531 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
14535 int file_index = DW_UNSND (attr);
14537 if (cu->line_header == NULL
14538 || file_index > cu->line_header->num_file_names)
14539 complaint (&symfile_complaints,
14540 _("file index out of range"));
14541 else if (file_index > 0)
14543 struct file_entry *fe;
14545 fe = &cu->line_header->file_names[file_index - 1];
14546 SYMBOL_SYMTAB (sym) = fe->symtab;
14553 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
14556 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
14558 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr;
14559 SYMBOL_DOMAIN (sym) = LABEL_DOMAIN;
14560 SYMBOL_CLASS (sym) = LOC_LABEL;
14561 add_symbol_to_list (sym, cu->list_in_scope);
14563 case DW_TAG_subprogram:
14564 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14566 SYMBOL_CLASS (sym) = LOC_BLOCK;
14567 attr2 = dwarf2_attr (die, DW_AT_external, cu);
14568 if ((attr2 && (DW_UNSND (attr2) != 0))
14569 || cu->language == language_ada)
14571 /* Subprograms marked external are stored as a global symbol.
14572 Ada subprograms, whether marked external or not, are always
14573 stored as a global symbol, because we want to be able to
14574 access them globally. For instance, we want to be able
14575 to break on a nested subprogram without having to
14576 specify the context. */
14577 list_to_add = &global_symbols;
14581 list_to_add = cu->list_in_scope;
14584 case DW_TAG_inlined_subroutine:
14585 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14587 SYMBOL_CLASS (sym) = LOC_BLOCK;
14588 SYMBOL_INLINED (sym) = 1;
14589 list_to_add = cu->list_in_scope;
14591 case DW_TAG_template_value_param:
14593 /* Fall through. */
14594 case DW_TAG_constant:
14595 case DW_TAG_variable:
14596 case DW_TAG_member:
14597 /* Compilation with minimal debug info may result in
14598 variables with missing type entries. Change the
14599 misleading `void' type to something sensible. */
14600 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
14602 = objfile_type (objfile)->nodebug_data_symbol;
14604 attr = dwarf2_attr (die, DW_AT_const_value, cu);
14605 /* In the case of DW_TAG_member, we should only be called for
14606 static const members. */
14607 if (die->tag == DW_TAG_member)
14609 /* dwarf2_add_field uses die_is_declaration,
14610 so we do the same. */
14611 gdb_assert (die_is_declaration (die, cu));
14616 dwarf2_const_value (attr, sym, cu);
14617 attr2 = dwarf2_attr (die, DW_AT_external, cu);
14620 if (attr2 && (DW_UNSND (attr2) != 0))
14621 list_to_add = &global_symbols;
14623 list_to_add = cu->list_in_scope;
14627 attr = dwarf2_attr (die, DW_AT_location, cu);
14630 var_decode_location (attr, sym, cu);
14631 attr2 = dwarf2_attr (die, DW_AT_external, cu);
14632 if (SYMBOL_CLASS (sym) == LOC_STATIC
14633 && SYMBOL_VALUE_ADDRESS (sym) == 0
14634 && !dwarf2_per_objfile->has_section_at_zero)
14636 /* When a static variable is eliminated by the linker,
14637 the corresponding debug information is not stripped
14638 out, but the variable address is set to null;
14639 do not add such variables into symbol table. */
14641 else if (attr2 && (DW_UNSND (attr2) != 0))
14643 /* Workaround gfortran PR debug/40040 - it uses
14644 DW_AT_location for variables in -fPIC libraries which may
14645 get overriden by other libraries/executable and get
14646 a different address. Resolve it by the minimal symbol
14647 which may come from inferior's executable using copy
14648 relocation. Make this workaround only for gfortran as for
14649 other compilers GDB cannot guess the minimal symbol
14650 Fortran mangling kind. */
14651 if (cu->language == language_fortran && die->parent
14652 && die->parent->tag == DW_TAG_module
14654 && strncmp (cu->producer, "GNU Fortran ", 12) == 0)
14655 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
14657 /* A variable with DW_AT_external is never static,
14658 but it may be block-scoped. */
14659 list_to_add = (cu->list_in_scope == &file_symbols
14660 ? &global_symbols : cu->list_in_scope);
14663 list_to_add = cu->list_in_scope;
14667 /* We do not know the address of this symbol.
14668 If it is an external symbol and we have type information
14669 for it, enter the symbol as a LOC_UNRESOLVED symbol.
14670 The address of the variable will then be determined from
14671 the minimal symbol table whenever the variable is
14673 attr2 = dwarf2_attr (die, DW_AT_external, cu);
14674 if (attr2 && (DW_UNSND (attr2) != 0)
14675 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
14677 /* A variable with DW_AT_external is never static, but it
14678 may be block-scoped. */
14679 list_to_add = (cu->list_in_scope == &file_symbols
14680 ? &global_symbols : cu->list_in_scope);
14682 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
14684 else if (!die_is_declaration (die, cu))
14686 /* Use the default LOC_OPTIMIZED_OUT class. */
14687 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
14689 list_to_add = cu->list_in_scope;
14693 case DW_TAG_formal_parameter:
14694 /* If we are inside a function, mark this as an argument. If
14695 not, we might be looking at an argument to an inlined function
14696 when we do not have enough information to show inlined frames;
14697 pretend it's a local variable in that case so that the user can
14699 if (context_stack_depth > 0
14700 && context_stack[context_stack_depth - 1].name != NULL)
14701 SYMBOL_IS_ARGUMENT (sym) = 1;
14702 attr = dwarf2_attr (die, DW_AT_location, cu);
14705 var_decode_location (attr, sym, cu);
14707 attr = dwarf2_attr (die, DW_AT_const_value, cu);
14710 dwarf2_const_value (attr, sym, cu);
14713 list_to_add = cu->list_in_scope;
14715 case DW_TAG_unspecified_parameters:
14716 /* From varargs functions; gdb doesn't seem to have any
14717 interest in this information, so just ignore it for now.
14720 case DW_TAG_template_type_param:
14722 /* Fall through. */
14723 case DW_TAG_class_type:
14724 case DW_TAG_interface_type:
14725 case DW_TAG_structure_type:
14726 case DW_TAG_union_type:
14727 case DW_TAG_set_type:
14728 case DW_TAG_enumeration_type:
14729 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
14730 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
14733 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
14734 really ever be static objects: otherwise, if you try
14735 to, say, break of a class's method and you're in a file
14736 which doesn't mention that class, it won't work unless
14737 the check for all static symbols in lookup_symbol_aux
14738 saves you. See the OtherFileClass tests in
14739 gdb.c++/namespace.exp. */
14743 list_to_add = (cu->list_in_scope == &file_symbols
14744 && (cu->language == language_cplus
14745 || cu->language == language_java)
14746 ? &global_symbols : cu->list_in_scope);
14748 /* The semantics of C++ state that "struct foo {
14749 ... }" also defines a typedef for "foo". A Java
14750 class declaration also defines a typedef for the
14752 if (cu->language == language_cplus
14753 || cu->language == language_java
14754 || cu->language == language_ada)
14756 /* The symbol's name is already allocated along
14757 with this objfile, so we don't need to
14758 duplicate it for the type. */
14759 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
14760 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
14765 case DW_TAG_typedef:
14766 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
14767 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
14768 list_to_add = cu->list_in_scope;
14770 case DW_TAG_base_type:
14771 case DW_TAG_subrange_type:
14772 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
14773 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
14774 list_to_add = cu->list_in_scope;
14776 case DW_TAG_enumerator:
14777 attr = dwarf2_attr (die, DW_AT_const_value, cu);
14780 dwarf2_const_value (attr, sym, cu);
14783 /* NOTE: carlton/2003-11-10: See comment above in the
14784 DW_TAG_class_type, etc. block. */
14786 list_to_add = (cu->list_in_scope == &file_symbols
14787 && (cu->language == language_cplus
14788 || cu->language == language_java)
14789 ? &global_symbols : cu->list_in_scope);
14792 case DW_TAG_namespace:
14793 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
14794 list_to_add = &global_symbols;
14797 /* Not a tag we recognize. Hopefully we aren't processing
14798 trash data, but since we must specifically ignore things
14799 we don't recognize, there is nothing else we should do at
14801 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
14802 dwarf_tag_name (die->tag));
14808 sym->hash_next = objfile->template_symbols;
14809 objfile->template_symbols = sym;
14810 list_to_add = NULL;
14813 if (list_to_add != NULL)
14814 add_symbol_to_list (sym, list_to_add);
14816 /* For the benefit of old versions of GCC, check for anonymous
14817 namespaces based on the demangled name. */
14818 if (!processing_has_namespace_info
14819 && cu->language == language_cplus)
14820 cp_scan_for_anonymous_namespaces (sym, objfile);
14825 /* A wrapper for new_symbol_full that always allocates a new symbol. */
14827 static struct symbol *
14828 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
14830 return new_symbol_full (die, type, cu, NULL);
14833 /* Given an attr with a DW_FORM_dataN value in host byte order,
14834 zero-extend it as appropriate for the symbol's type. The DWARF
14835 standard (v4) is not entirely clear about the meaning of using
14836 DW_FORM_dataN for a constant with a signed type, where the type is
14837 wider than the data. The conclusion of a discussion on the DWARF
14838 list was that this is unspecified. We choose to always zero-extend
14839 because that is the interpretation long in use by GCC. */
14842 dwarf2_const_value_data (struct attribute *attr, struct type *type,
14843 const char *name, struct obstack *obstack,
14844 struct dwarf2_cu *cu, LONGEST *value, int bits)
14846 struct objfile *objfile = cu->objfile;
14847 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
14848 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
14849 LONGEST l = DW_UNSND (attr);
14851 if (bits < sizeof (*value) * 8)
14853 l &= ((LONGEST) 1 << bits) - 1;
14856 else if (bits == sizeof (*value) * 8)
14860 gdb_byte *bytes = obstack_alloc (obstack, bits / 8);
14861 store_unsigned_integer (bytes, bits / 8, byte_order, l);
14868 /* Read a constant value from an attribute. Either set *VALUE, or if
14869 the value does not fit in *VALUE, set *BYTES - either already
14870 allocated on the objfile obstack, or newly allocated on OBSTACK,
14871 or, set *BATON, if we translated the constant to a location
14875 dwarf2_const_value_attr (struct attribute *attr, struct type *type,
14876 const char *name, struct obstack *obstack,
14877 struct dwarf2_cu *cu,
14878 LONGEST *value, gdb_byte **bytes,
14879 struct dwarf2_locexpr_baton **baton)
14881 struct objfile *objfile = cu->objfile;
14882 struct comp_unit_head *cu_header = &cu->header;
14883 struct dwarf_block *blk;
14884 enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ?
14885 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE);
14891 switch (attr->form)
14894 case DW_FORM_GNU_addr_index:
14898 if (TYPE_LENGTH (type) != cu_header->addr_size)
14899 dwarf2_const_value_length_mismatch_complaint (name,
14900 cu_header->addr_size,
14901 TYPE_LENGTH (type));
14902 /* Symbols of this form are reasonably rare, so we just
14903 piggyback on the existing location code rather than writing
14904 a new implementation of symbol_computed_ops. */
14905 *baton = obstack_alloc (&objfile->objfile_obstack,
14906 sizeof (struct dwarf2_locexpr_baton));
14907 (*baton)->per_cu = cu->per_cu;
14908 gdb_assert ((*baton)->per_cu);
14910 (*baton)->size = 2 + cu_header->addr_size;
14911 data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size);
14912 (*baton)->data = data;
14914 data[0] = DW_OP_addr;
14915 store_unsigned_integer (&data[1], cu_header->addr_size,
14916 byte_order, DW_ADDR (attr));
14917 data[cu_header->addr_size + 1] = DW_OP_stack_value;
14920 case DW_FORM_string:
14922 case DW_FORM_GNU_str_index:
14923 /* DW_STRING is already allocated on the objfile obstack, point
14925 *bytes = (gdb_byte *) DW_STRING (attr);
14927 case DW_FORM_block1:
14928 case DW_FORM_block2:
14929 case DW_FORM_block4:
14930 case DW_FORM_block:
14931 case DW_FORM_exprloc:
14932 blk = DW_BLOCK (attr);
14933 if (TYPE_LENGTH (type) != blk->size)
14934 dwarf2_const_value_length_mismatch_complaint (name, blk->size,
14935 TYPE_LENGTH (type));
14936 *bytes = blk->data;
14939 /* The DW_AT_const_value attributes are supposed to carry the
14940 symbol's value "represented as it would be on the target
14941 architecture." By the time we get here, it's already been
14942 converted to host endianness, so we just need to sign- or
14943 zero-extend it as appropriate. */
14944 case DW_FORM_data1:
14945 *bytes = dwarf2_const_value_data (attr, type, name,
14946 obstack, cu, value, 8);
14948 case DW_FORM_data2:
14949 *bytes = dwarf2_const_value_data (attr, type, name,
14950 obstack, cu, value, 16);
14952 case DW_FORM_data4:
14953 *bytes = dwarf2_const_value_data (attr, type, name,
14954 obstack, cu, value, 32);
14956 case DW_FORM_data8:
14957 *bytes = dwarf2_const_value_data (attr, type, name,
14958 obstack, cu, value, 64);
14961 case DW_FORM_sdata:
14962 *value = DW_SND (attr);
14965 case DW_FORM_udata:
14966 *value = DW_UNSND (attr);
14970 complaint (&symfile_complaints,
14971 _("unsupported const value attribute form: '%s'"),
14972 dwarf_form_name (attr->form));
14979 /* Copy constant value from an attribute to a symbol. */
14982 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
14983 struct dwarf2_cu *cu)
14985 struct objfile *objfile = cu->objfile;
14986 struct comp_unit_head *cu_header = &cu->header;
14989 struct dwarf2_locexpr_baton *baton;
14991 dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym),
14992 SYMBOL_PRINT_NAME (sym),
14993 &objfile->objfile_obstack, cu,
14994 &value, &bytes, &baton);
14998 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
14999 SYMBOL_LOCATION_BATON (sym) = baton;
15000 SYMBOL_CLASS (sym) = LOC_COMPUTED;
15002 else if (bytes != NULL)
15004 SYMBOL_VALUE_BYTES (sym) = bytes;
15005 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
15009 SYMBOL_VALUE (sym) = value;
15010 SYMBOL_CLASS (sym) = LOC_CONST;
15014 /* Return the type of the die in question using its DW_AT_type attribute. */
15016 static struct type *
15017 die_type (struct die_info *die, struct dwarf2_cu *cu)
15019 struct attribute *type_attr;
15021 type_attr = dwarf2_attr (die, DW_AT_type, cu);
15024 /* A missing DW_AT_type represents a void type. */
15025 return objfile_type (cu->objfile)->builtin_void;
15028 return lookup_die_type (die, type_attr, cu);
15031 /* True iff CU's producer generates GNAT Ada auxiliary information
15032 that allows to find parallel types through that information instead
15033 of having to do expensive parallel lookups by type name. */
15036 need_gnat_info (struct dwarf2_cu *cu)
15038 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
15039 of GNAT produces this auxiliary information, without any indication
15040 that it is produced. Part of enhancing the FSF version of GNAT
15041 to produce that information will be to put in place an indicator
15042 that we can use in order to determine whether the descriptive type
15043 info is available or not. One suggestion that has been made is
15044 to use a new attribute, attached to the CU die. For now, assume
15045 that the descriptive type info is not available. */
15049 /* Return the auxiliary type of the die in question using its
15050 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
15051 attribute is not present. */
15053 static struct type *
15054 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
15056 struct attribute *type_attr;
15058 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
15062 return lookup_die_type (die, type_attr, cu);
15065 /* If DIE has a descriptive_type attribute, then set the TYPE's
15066 descriptive type accordingly. */
15069 set_descriptive_type (struct type *type, struct die_info *die,
15070 struct dwarf2_cu *cu)
15072 struct type *descriptive_type = die_descriptive_type (die, cu);
15074 if (descriptive_type)
15076 ALLOCATE_GNAT_AUX_TYPE (type);
15077 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
15081 /* Return the containing type of the die in question using its
15082 DW_AT_containing_type attribute. */
15084 static struct type *
15085 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
15087 struct attribute *type_attr;
15089 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
15091 error (_("Dwarf Error: Problem turning containing type into gdb type "
15092 "[in module %s]"), cu->objfile->name);
15094 return lookup_die_type (die, type_attr, cu);
15097 /* Look up the type of DIE in CU using its type attribute ATTR.
15098 If there is no type substitute an error marker. */
15100 static struct type *
15101 lookup_die_type (struct die_info *die, struct attribute *attr,
15102 struct dwarf2_cu *cu)
15104 struct objfile *objfile = cu->objfile;
15105 struct type *this_type;
15107 /* First see if we have it cached. */
15109 if (is_ref_attr (attr))
15111 sect_offset offset = dwarf2_get_ref_die_offset (attr);
15113 this_type = get_die_type_at_offset (offset, cu->per_cu);
15115 else if (attr->form == DW_FORM_ref_sig8)
15117 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
15119 /* sig_type will be NULL if the signatured type is missing from
15121 if (sig_type == NULL)
15122 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
15123 "at 0x%x [in module %s]"),
15124 die->offset.sect_off, objfile->name);
15126 gdb_assert (sig_type->per_cu.is_debug_types);
15127 /* If we haven't filled in type_offset_in_section yet, then we
15128 haven't read the type in yet. */
15130 if (sig_type->type_offset_in_section.sect_off != 0)
15133 get_die_type_at_offset (sig_type->type_offset_in_section,
15134 &sig_type->per_cu);
15139 dump_die_for_error (die);
15140 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
15141 dwarf_attr_name (attr->name), objfile->name);
15144 /* If not cached we need to read it in. */
15146 if (this_type == NULL)
15148 struct die_info *type_die;
15149 struct dwarf2_cu *type_cu = cu;
15151 type_die = follow_die_ref_or_sig (die, attr, &type_cu);
15152 /* If we found the type now, it's probably because the type came
15153 from an inter-CU reference and the type's CU got expanded before
15155 this_type = get_die_type (type_die, type_cu);
15156 if (this_type == NULL)
15157 this_type = read_type_die_1 (type_die, type_cu);
15160 /* If we still don't have a type use an error marker. */
15162 if (this_type == NULL)
15164 char *message, *saved;
15166 /* read_type_die already issued a complaint. */
15167 message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
15169 cu->header.offset.sect_off,
15170 die->offset.sect_off);
15171 saved = obstack_copy0 (&objfile->objfile_obstack,
15172 message, strlen (message));
15175 this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile);
15181 /* Return the type in DIE, CU.
15182 Returns NULL for invalid types.
15184 This first does a lookup in the appropriate type_hash table,
15185 and only reads the die in if necessary.
15187 NOTE: This can be called when reading in partial or full symbols. */
15189 static struct type *
15190 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
15192 struct type *this_type;
15194 this_type = get_die_type (die, cu);
15198 return read_type_die_1 (die, cu);
15201 /* Read the type in DIE, CU.
15202 Returns NULL for invalid types. */
15204 static struct type *
15205 read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
15207 struct type *this_type = NULL;
15211 case DW_TAG_class_type:
15212 case DW_TAG_interface_type:
15213 case DW_TAG_structure_type:
15214 case DW_TAG_union_type:
15215 this_type = read_structure_type (die, cu);
15217 case DW_TAG_enumeration_type:
15218 this_type = read_enumeration_type (die, cu);
15220 case DW_TAG_subprogram:
15221 case DW_TAG_subroutine_type:
15222 case DW_TAG_inlined_subroutine:
15223 this_type = read_subroutine_type (die, cu);
15225 case DW_TAG_array_type:
15226 this_type = read_array_type (die, cu);
15228 case DW_TAG_set_type:
15229 this_type = read_set_type (die, cu);
15231 case DW_TAG_pointer_type:
15232 this_type = read_tag_pointer_type (die, cu);
15234 case DW_TAG_ptr_to_member_type:
15235 this_type = read_tag_ptr_to_member_type (die, cu);
15237 case DW_TAG_reference_type:
15238 this_type = read_tag_reference_type (die, cu);
15240 case DW_TAG_const_type:
15241 this_type = read_tag_const_type (die, cu);
15243 case DW_TAG_volatile_type:
15244 this_type = read_tag_volatile_type (die, cu);
15246 case DW_TAG_string_type:
15247 this_type = read_tag_string_type (die, cu);
15249 case DW_TAG_typedef:
15250 this_type = read_typedef (die, cu);
15252 case DW_TAG_subrange_type:
15253 this_type = read_subrange_type (die, cu);
15255 case DW_TAG_base_type:
15256 this_type = read_base_type (die, cu);
15258 case DW_TAG_unspecified_type:
15259 this_type = read_unspecified_type (die, cu);
15261 case DW_TAG_namespace:
15262 this_type = read_namespace_type (die, cu);
15264 case DW_TAG_module:
15265 this_type = read_module_type (die, cu);
15268 complaint (&symfile_complaints,
15269 _("unexpected tag in read_type_die: '%s'"),
15270 dwarf_tag_name (die->tag));
15277 /* See if we can figure out if the class lives in a namespace. We do
15278 this by looking for a member function; its demangled name will
15279 contain namespace info, if there is any.
15280 Return the computed name or NULL.
15281 Space for the result is allocated on the objfile's obstack.
15282 This is the full-die version of guess_partial_die_structure_name.
15283 In this case we know DIE has no useful parent. */
15286 guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu)
15288 struct die_info *spec_die;
15289 struct dwarf2_cu *spec_cu;
15290 struct die_info *child;
15293 spec_die = die_specification (die, &spec_cu);
15294 if (spec_die != NULL)
15300 for (child = die->child;
15302 child = child->sibling)
15304 if (child->tag == DW_TAG_subprogram)
15306 struct attribute *attr;
15308 attr = dwarf2_attr (child, DW_AT_linkage_name, cu);
15310 attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu);
15314 = language_class_name_from_physname (cu->language_defn,
15318 if (actual_name != NULL)
15320 char *die_name = dwarf2_name (die, cu);
15322 if (die_name != NULL
15323 && strcmp (die_name, actual_name) != 0)
15325 /* Strip off the class name from the full name.
15326 We want the prefix. */
15327 int die_name_len = strlen (die_name);
15328 int actual_name_len = strlen (actual_name);
15330 /* Test for '::' as a sanity check. */
15331 if (actual_name_len > die_name_len + 2
15332 && actual_name[actual_name_len
15333 - die_name_len - 1] == ':')
15335 obsavestring (actual_name,
15336 actual_name_len - die_name_len - 2,
15337 &cu->objfile->objfile_obstack);
15340 xfree (actual_name);
15349 /* GCC might emit a nameless typedef that has a linkage name. Determine the
15350 prefix part in such case. See
15351 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15354 anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu)
15356 struct attribute *attr;
15359 if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type
15360 && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type)
15363 attr = dwarf2_attr (die, DW_AT_name, cu);
15364 if (attr != NULL && DW_STRING (attr) != NULL)
15367 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
15369 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
15370 if (attr == NULL || DW_STRING (attr) == NULL)
15373 /* dwarf2_name had to be already called. */
15374 gdb_assert (DW_STRING_IS_CANONICAL (attr));
15376 /* Strip the base name, keep any leading namespaces/classes. */
15377 base = strrchr (DW_STRING (attr), ':');
15378 if (base == NULL || base == DW_STRING (attr) || base[-1] != ':')
15381 return obsavestring (DW_STRING (attr), &base[-1] - DW_STRING (attr),
15382 &cu->objfile->objfile_obstack);
15385 /* Return the name of the namespace/class that DIE is defined within,
15386 or "" if we can't tell. The caller should not xfree the result.
15388 For example, if we're within the method foo() in the following
15398 then determine_prefix on foo's die will return "N::C". */
15400 static const char *
15401 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
15403 struct die_info *parent, *spec_die;
15404 struct dwarf2_cu *spec_cu;
15405 struct type *parent_type;
15408 if (cu->language != language_cplus && cu->language != language_java
15409 && cu->language != language_fortran)
15412 retval = anonymous_struct_prefix (die, cu);
15416 /* We have to be careful in the presence of DW_AT_specification.
15417 For example, with GCC 3.4, given the code
15421 // Definition of N::foo.
15425 then we'll have a tree of DIEs like this:
15427 1: DW_TAG_compile_unit
15428 2: DW_TAG_namespace // N
15429 3: DW_TAG_subprogram // declaration of N::foo
15430 4: DW_TAG_subprogram // definition of N::foo
15431 DW_AT_specification // refers to die #3
15433 Thus, when processing die #4, we have to pretend that we're in
15434 the context of its DW_AT_specification, namely the contex of die
15437 spec_die = die_specification (die, &spec_cu);
15438 if (spec_die == NULL)
15439 parent = die->parent;
15442 parent = spec_die->parent;
15446 if (parent == NULL)
15448 else if (parent->building_fullname)
15451 const char *parent_name;
15453 /* It has been seen on RealView 2.2 built binaries,
15454 DW_TAG_template_type_param types actually _defined_ as
15455 children of the parent class:
15458 template class <class Enum> Class{};
15459 Class<enum E> class_e;
15461 1: DW_TAG_class_type (Class)
15462 2: DW_TAG_enumeration_type (E)
15463 3: DW_TAG_enumerator (enum1:0)
15464 3: DW_TAG_enumerator (enum2:1)
15466 2: DW_TAG_template_type_param
15467 DW_AT_type DW_FORM_ref_udata (E)
15469 Besides being broken debug info, it can put GDB into an
15470 infinite loop. Consider:
15472 When we're building the full name for Class<E>, we'll start
15473 at Class, and go look over its template type parameters,
15474 finding E. We'll then try to build the full name of E, and
15475 reach here. We're now trying to build the full name of E,
15476 and look over the parent DIE for containing scope. In the
15477 broken case, if we followed the parent DIE of E, we'd again
15478 find Class, and once again go look at its template type
15479 arguments, etc., etc. Simply don't consider such parent die
15480 as source-level parent of this die (it can't be, the language
15481 doesn't allow it), and break the loop here. */
15482 name = dwarf2_name (die, cu);
15483 parent_name = dwarf2_name (parent, cu);
15484 complaint (&symfile_complaints,
15485 _("template param type '%s' defined within parent '%s'"),
15486 name ? name : "<unknown>",
15487 parent_name ? parent_name : "<unknown>");
15491 switch (parent->tag)
15493 case DW_TAG_namespace:
15494 parent_type = read_type_die (parent, cu);
15495 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
15496 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
15497 Work around this problem here. */
15498 if (cu->language == language_cplus
15499 && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0)
15501 /* We give a name to even anonymous namespaces. */
15502 return TYPE_TAG_NAME (parent_type);
15503 case DW_TAG_class_type:
15504 case DW_TAG_interface_type:
15505 case DW_TAG_structure_type:
15506 case DW_TAG_union_type:
15507 case DW_TAG_module:
15508 parent_type = read_type_die (parent, cu);
15509 if (TYPE_TAG_NAME (parent_type) != NULL)
15510 return TYPE_TAG_NAME (parent_type);
15512 /* An anonymous structure is only allowed non-static data
15513 members; no typedefs, no member functions, et cetera.
15514 So it does not need a prefix. */
15516 case DW_TAG_compile_unit:
15517 case DW_TAG_partial_unit:
15518 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
15519 if (cu->language == language_cplus
15520 && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
15521 && die->child != NULL
15522 && (die->tag == DW_TAG_class_type
15523 || die->tag == DW_TAG_structure_type
15524 || die->tag == DW_TAG_union_type))
15526 char *name = guess_full_die_structure_name (die, cu);
15532 return determine_prefix (parent, cu);
15536 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
15537 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
15538 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
15539 an obconcat, otherwise allocate storage for the result. The CU argument is
15540 used to determine the language and hence, the appropriate separator. */
15542 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
15545 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
15546 int physname, struct dwarf2_cu *cu)
15548 const char *lead = "";
15551 if (suffix == NULL || suffix[0] == '\0'
15552 || prefix == NULL || prefix[0] == '\0')
15554 else if (cu->language == language_java)
15556 else if (cu->language == language_fortran && physname)
15558 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
15559 DW_AT_MIPS_linkage_name is preferred and used instead. */
15567 if (prefix == NULL)
15569 if (suffix == NULL)
15575 = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
15577 strcpy (retval, lead);
15578 strcat (retval, prefix);
15579 strcat (retval, sep);
15580 strcat (retval, suffix);
15585 /* We have an obstack. */
15586 return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL);
15590 /* Return sibling of die, NULL if no sibling. */
15592 static struct die_info *
15593 sibling_die (struct die_info *die)
15595 return die->sibling;
15598 /* Get name of a die, return NULL if not found. */
15601 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
15602 struct obstack *obstack)
15604 if (name && cu->language == language_cplus)
15606 char *canon_name = cp_canonicalize_string (name);
15608 if (canon_name != NULL)
15610 if (strcmp (canon_name, name) != 0)
15611 name = obsavestring (canon_name, strlen (canon_name),
15613 xfree (canon_name);
15620 /* Get name of a die, return NULL if not found. */
15623 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
15625 struct attribute *attr;
15627 attr = dwarf2_attr (die, DW_AT_name, cu);
15628 if ((!attr || !DW_STRING (attr))
15629 && die->tag != DW_TAG_class_type
15630 && die->tag != DW_TAG_interface_type
15631 && die->tag != DW_TAG_structure_type
15632 && die->tag != DW_TAG_union_type)
15637 case DW_TAG_compile_unit:
15638 case DW_TAG_partial_unit:
15639 /* Compilation units have a DW_AT_name that is a filename, not
15640 a source language identifier. */
15641 case DW_TAG_enumeration_type:
15642 case DW_TAG_enumerator:
15643 /* These tags always have simple identifiers already; no need
15644 to canonicalize them. */
15645 return DW_STRING (attr);
15647 case DW_TAG_subprogram:
15648 /* Java constructors will all be named "<init>", so return
15649 the class name when we see this special case. */
15650 if (cu->language == language_java
15651 && DW_STRING (attr) != NULL
15652 && strcmp (DW_STRING (attr), "<init>") == 0)
15654 struct dwarf2_cu *spec_cu = cu;
15655 struct die_info *spec_die;
15657 /* GCJ will output '<init>' for Java constructor names.
15658 For this special case, return the name of the parent class. */
15660 /* GCJ may output suprogram DIEs with AT_specification set.
15661 If so, use the name of the specified DIE. */
15662 spec_die = die_specification (die, &spec_cu);
15663 if (spec_die != NULL)
15664 return dwarf2_name (spec_die, spec_cu);
15669 if (die->tag == DW_TAG_class_type)
15670 return dwarf2_name (die, cu);
15672 while (die->tag != DW_TAG_compile_unit
15673 && die->tag != DW_TAG_partial_unit);
15677 case DW_TAG_class_type:
15678 case DW_TAG_interface_type:
15679 case DW_TAG_structure_type:
15680 case DW_TAG_union_type:
15681 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
15682 structures or unions. These were of the form "._%d" in GCC 4.1,
15683 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
15684 and GCC 4.4. We work around this problem by ignoring these. */
15685 if (attr && DW_STRING (attr)
15686 && (strncmp (DW_STRING (attr), "._", 2) == 0
15687 || strncmp (DW_STRING (attr), "<anonymous", 10) == 0))
15690 /* GCC might emit a nameless typedef that has a linkage name. See
15691 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15692 if (!attr || DW_STRING (attr) == NULL)
15694 char *demangled = NULL;
15696 attr = dwarf2_attr (die, DW_AT_linkage_name, cu);
15698 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
15700 if (attr == NULL || DW_STRING (attr) == NULL)
15703 /* Avoid demangling DW_STRING (attr) the second time on a second
15704 call for the same DIE. */
15705 if (!DW_STRING_IS_CANONICAL (attr))
15706 demangled = cplus_demangle (DW_STRING (attr), DMGL_TYPES);
15712 /* FIXME: we already did this for the partial symbol... */
15713 DW_STRING (attr) = obsavestring (demangled, strlen (demangled),
15714 &cu->objfile->objfile_obstack);
15715 DW_STRING_IS_CANONICAL (attr) = 1;
15718 /* Strip any leading namespaces/classes, keep only the base name.
15719 DW_AT_name for named DIEs does not contain the prefixes. */
15720 base = strrchr (DW_STRING (attr), ':');
15721 if (base && base > DW_STRING (attr) && base[-1] == ':')
15724 return DW_STRING (attr);
15733 if (!DW_STRING_IS_CANONICAL (attr))
15736 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
15737 &cu->objfile->objfile_obstack);
15738 DW_STRING_IS_CANONICAL (attr) = 1;
15740 return DW_STRING (attr);
15743 /* Return the die that this die in an extension of, or NULL if there
15744 is none. *EXT_CU is the CU containing DIE on input, and the CU
15745 containing the return value on output. */
15747 static struct die_info *
15748 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
15750 struct attribute *attr;
15752 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
15756 return follow_die_ref (die, attr, ext_cu);
15759 /* Convert a DIE tag into its string name. */
15761 static const char *
15762 dwarf_tag_name (unsigned tag)
15764 const char *name = get_DW_TAG_name (tag);
15767 return "DW_TAG_<unknown>";
15772 /* Convert a DWARF attribute code into its string name. */
15774 static const char *
15775 dwarf_attr_name (unsigned attr)
15779 #ifdef MIPS /* collides with DW_AT_HP_block_index */
15780 if (attr == DW_AT_MIPS_fde)
15781 return "DW_AT_MIPS_fde";
15783 if (attr == DW_AT_HP_block_index)
15784 return "DW_AT_HP_block_index";
15787 name = get_DW_AT_name (attr);
15790 return "DW_AT_<unknown>";
15795 /* Convert a DWARF value form code into its string name. */
15797 static const char *
15798 dwarf_form_name (unsigned form)
15800 const char *name = get_DW_FORM_name (form);
15803 return "DW_FORM_<unknown>";
15809 dwarf_bool_name (unsigned mybool)
15817 /* Convert a DWARF type code into its string name. */
15819 static const char *
15820 dwarf_type_encoding_name (unsigned enc)
15822 const char *name = get_DW_ATE_name (enc);
15825 return "DW_ATE_<unknown>";
15831 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
15835 print_spaces (indent, f);
15836 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
15837 dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off);
15839 if (die->parent != NULL)
15841 print_spaces (indent, f);
15842 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
15843 die->parent->offset.sect_off);
15846 print_spaces (indent, f);
15847 fprintf_unfiltered (f, " has children: %s\n",
15848 dwarf_bool_name (die->child != NULL));
15850 print_spaces (indent, f);
15851 fprintf_unfiltered (f, " attributes:\n");
15853 for (i = 0; i < die->num_attrs; ++i)
15855 print_spaces (indent, f);
15856 fprintf_unfiltered (f, " %s (%s) ",
15857 dwarf_attr_name (die->attrs[i].name),
15858 dwarf_form_name (die->attrs[i].form));
15860 switch (die->attrs[i].form)
15863 case DW_FORM_GNU_addr_index:
15864 fprintf_unfiltered (f, "address: ");
15865 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
15867 case DW_FORM_block2:
15868 case DW_FORM_block4:
15869 case DW_FORM_block:
15870 case DW_FORM_block1:
15871 fprintf_unfiltered (f, "block: size %d",
15872 DW_BLOCK (&die->attrs[i])->size);
15874 case DW_FORM_exprloc:
15875 fprintf_unfiltered (f, "expression: size %u",
15876 DW_BLOCK (&die->attrs[i])->size);
15878 case DW_FORM_ref_addr:
15879 fprintf_unfiltered (f, "ref address: ");
15880 fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f);
15886 case DW_FORM_ref_udata:
15887 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
15888 (long) (DW_UNSND (&die->attrs[i])));
15890 case DW_FORM_data1:
15891 case DW_FORM_data2:
15892 case DW_FORM_data4:
15893 case DW_FORM_data8:
15894 case DW_FORM_udata:
15895 case DW_FORM_sdata:
15896 fprintf_unfiltered (f, "constant: %s",
15897 pulongest (DW_UNSND (&die->attrs[i])));
15899 case DW_FORM_sec_offset:
15900 fprintf_unfiltered (f, "section offset: %s",
15901 pulongest (DW_UNSND (&die->attrs[i])));
15903 case DW_FORM_ref_sig8:
15904 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
15905 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
15906 DW_SIGNATURED_TYPE (&die->attrs[i])->per_cu.offset.sect_off);
15908 fprintf_unfiltered (f, "signatured type, offset: unknown");
15910 case DW_FORM_string:
15912 case DW_FORM_GNU_str_index:
15913 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
15914 DW_STRING (&die->attrs[i])
15915 ? DW_STRING (&die->attrs[i]) : "",
15916 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
15919 if (DW_UNSND (&die->attrs[i]))
15920 fprintf_unfiltered (f, "flag: TRUE");
15922 fprintf_unfiltered (f, "flag: FALSE");
15924 case DW_FORM_flag_present:
15925 fprintf_unfiltered (f, "flag: TRUE");
15927 case DW_FORM_indirect:
15928 /* The reader will have reduced the indirect form to
15929 the "base form" so this form should not occur. */
15930 fprintf_unfiltered (f,
15931 "unexpected attribute form: DW_FORM_indirect");
15934 fprintf_unfiltered (f, "unsupported attribute form: %d.",
15935 die->attrs[i].form);
15938 fprintf_unfiltered (f, "\n");
15943 dump_die_for_error (struct die_info *die)
15945 dump_die_shallow (gdb_stderr, 0, die);
15949 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
15951 int indent = level * 4;
15953 gdb_assert (die != NULL);
15955 if (level >= max_level)
15958 dump_die_shallow (f, indent, die);
15960 if (die->child != NULL)
15962 print_spaces (indent, f);
15963 fprintf_unfiltered (f, " Children:");
15964 if (level + 1 < max_level)
15966 fprintf_unfiltered (f, "\n");
15967 dump_die_1 (f, level + 1, max_level, die->child);
15971 fprintf_unfiltered (f,
15972 " [not printed, max nesting level reached]\n");
15976 if (die->sibling != NULL && level > 0)
15978 dump_die_1 (f, level, max_level, die->sibling);
15982 /* This is called from the pdie macro in gdbinit.in.
15983 It's not static so gcc will keep a copy callable from gdb. */
15986 dump_die (struct die_info *die, int max_level)
15988 dump_die_1 (gdb_stdlog, 0, max_level, die);
15992 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
15996 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off,
16002 /* DW_ADDR is always stored already as sect_offset; despite for the forms
16003 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
16006 is_ref_attr (struct attribute *attr)
16008 switch (attr->form)
16010 case DW_FORM_ref_addr:
16015 case DW_FORM_ref_udata:
16022 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
16026 dwarf2_get_ref_die_offset (struct attribute *attr)
16028 sect_offset retval = { DW_UNSND (attr) };
16030 if (is_ref_attr (attr))
16033 retval.sect_off = 0;
16034 complaint (&symfile_complaints,
16035 _("unsupported die ref attribute form: '%s'"),
16036 dwarf_form_name (attr->form));
16040 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
16041 * the value held by the attribute is not constant. */
16044 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
16046 if (attr->form == DW_FORM_sdata)
16047 return DW_SND (attr);
16048 else if (attr->form == DW_FORM_udata
16049 || attr->form == DW_FORM_data1
16050 || attr->form == DW_FORM_data2
16051 || attr->form == DW_FORM_data4
16052 || attr->form == DW_FORM_data8)
16053 return DW_UNSND (attr);
16056 complaint (&symfile_complaints,
16057 _("Attribute value is not a constant (%s)"),
16058 dwarf_form_name (attr->form));
16059 return default_value;
16063 /* Follow reference or signature attribute ATTR of SRC_DIE.
16064 On entry *REF_CU is the CU of SRC_DIE.
16065 On exit *REF_CU is the CU of the result. */
16067 static struct die_info *
16068 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
16069 struct dwarf2_cu **ref_cu)
16071 struct die_info *die;
16073 if (is_ref_attr (attr))
16074 die = follow_die_ref (src_die, attr, ref_cu);
16075 else if (attr->form == DW_FORM_ref_sig8)
16076 die = follow_die_sig (src_die, attr, ref_cu);
16079 dump_die_for_error (src_die);
16080 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
16081 (*ref_cu)->objfile->name);
16087 /* Follow reference OFFSET.
16088 On entry *REF_CU is the CU of the source die referencing OFFSET.
16089 On exit *REF_CU is the CU of the result.
16090 Returns NULL if OFFSET is invalid. */
16092 static struct die_info *
16093 follow_die_offset (sect_offset offset, struct dwarf2_cu **ref_cu)
16095 struct die_info temp_die;
16096 struct dwarf2_cu *target_cu, *cu = *ref_cu;
16098 gdb_assert (cu->per_cu != NULL);
16102 if (cu->per_cu->is_debug_types)
16104 /* .debug_types CUs cannot reference anything outside their CU.
16105 If they need to, they have to reference a signatured type via
16106 DW_FORM_ref_sig8. */
16107 if (! offset_in_cu_p (&cu->header, offset))
16110 else if (! offset_in_cu_p (&cu->header, offset))
16112 struct dwarf2_per_cu_data *per_cu;
16114 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
16116 /* If necessary, add it to the queue and load its DIEs. */
16117 if (maybe_queue_comp_unit (cu, per_cu, cu->language))
16118 load_full_comp_unit (per_cu, cu->language);
16120 target_cu = per_cu->cu;
16122 else if (cu->dies == NULL)
16124 /* We're loading full DIEs during partial symbol reading. */
16125 gdb_assert (dwarf2_per_objfile->reading_partial_symbols);
16126 load_full_comp_unit (cu->per_cu, language_minimal);
16129 *ref_cu = target_cu;
16130 temp_die.offset = offset;
16131 return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off);
16134 /* Follow reference attribute ATTR of SRC_DIE.
16135 On entry *REF_CU is the CU of SRC_DIE.
16136 On exit *REF_CU is the CU of the result. */
16138 static struct die_info *
16139 follow_die_ref (struct die_info *src_die, struct attribute *attr,
16140 struct dwarf2_cu **ref_cu)
16142 sect_offset offset = dwarf2_get_ref_die_offset (attr);
16143 struct dwarf2_cu *cu = *ref_cu;
16144 struct die_info *die;
16146 die = follow_die_offset (offset, ref_cu);
16148 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
16149 "at 0x%x [in module %s]"),
16150 offset.sect_off, src_die->offset.sect_off, cu->objfile->name);
16155 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
16156 Returned value is intended for DW_OP_call*. Returned
16157 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
16159 struct dwarf2_locexpr_baton
16160 dwarf2_fetch_die_location_block (cu_offset offset_in_cu,
16161 struct dwarf2_per_cu_data *per_cu,
16162 CORE_ADDR (*get_frame_pc) (void *baton),
16165 sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off };
16166 struct dwarf2_cu *cu;
16167 struct die_info *die;
16168 struct attribute *attr;
16169 struct dwarf2_locexpr_baton retval;
16171 dw2_setup (per_cu->objfile);
16173 if (per_cu->cu == NULL)
16177 die = follow_die_offset (offset, &cu);
16179 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
16180 offset.sect_off, per_cu->objfile->name);
16182 attr = dwarf2_attr (die, DW_AT_location, cu);
16185 /* DWARF: "If there is no such attribute, then there is no effect.".
16186 DATA is ignored if SIZE is 0. */
16188 retval.data = NULL;
16191 else if (attr_form_is_section_offset (attr))
16193 struct dwarf2_loclist_baton loclist_baton;
16194 CORE_ADDR pc = (*get_frame_pc) (baton);
16197 fill_in_loclist_baton (cu, &loclist_baton, attr);
16199 retval.data = dwarf2_find_location_expression (&loclist_baton,
16201 retval.size = size;
16205 if (!attr_form_is_block (attr))
16206 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
16207 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
16208 offset.sect_off, per_cu->objfile->name);
16210 retval.data = DW_BLOCK (attr)->data;
16211 retval.size = DW_BLOCK (attr)->size;
16213 retval.per_cu = cu->per_cu;
16215 age_cached_comp_units ();
16220 /* Return the type of the DIE at DIE_OFFSET in the CU named by
16224 dwarf2_get_die_type (cu_offset die_offset,
16225 struct dwarf2_per_cu_data *per_cu)
16227 sect_offset die_offset_sect;
16229 dw2_setup (per_cu->objfile);
16231 die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off;
16232 return get_die_type_at_offset (die_offset_sect, per_cu);
16235 /* Follow the signature attribute ATTR in SRC_DIE.
16236 On entry *REF_CU is the CU of SRC_DIE.
16237 On exit *REF_CU is the CU of the result. */
16239 static struct die_info *
16240 follow_die_sig (struct die_info *src_die, struct attribute *attr,
16241 struct dwarf2_cu **ref_cu)
16243 struct objfile *objfile = (*ref_cu)->objfile;
16244 struct die_info temp_die;
16245 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
16246 struct dwarf2_cu *sig_cu;
16247 struct die_info *die;
16249 /* sig_type will be NULL if the signatured type is missing from
16251 if (sig_type == NULL)
16252 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16253 "at 0x%x [in module %s]"),
16254 src_die->offset.sect_off, objfile->name);
16256 /* If necessary, add it to the queue and load its DIEs. */
16258 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal))
16259 read_signatured_type (sig_type);
16261 gdb_assert (sig_type->per_cu.cu != NULL);
16263 sig_cu = sig_type->per_cu.cu;
16264 gdb_assert (sig_type->type_offset_in_section.sect_off != 0);
16265 temp_die.offset = sig_type->type_offset_in_section;
16266 die = htab_find_with_hash (sig_cu->die_hash, &temp_die,
16267 temp_die.offset.sect_off);
16274 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
16275 "from DIE at 0x%x [in module %s]"),
16276 temp_die.offset.sect_off, src_die->offset.sect_off, objfile->name);
16279 /* Given an offset of a signatured type, return its signatured_type. */
16281 static struct signatured_type *
16282 lookup_signatured_type_at_offset (struct objfile *objfile,
16283 struct dwarf2_section_info *section,
16284 sect_offset offset)
16286 gdb_byte *info_ptr = section->buffer + offset.sect_off;
16287 unsigned int length, initial_length_size;
16288 unsigned int sig_offset;
16289 struct signatured_type find_entry, *sig_type;
16291 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
16292 sig_offset = (initial_length_size
16294 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
16295 + 1 /*address_size*/);
16296 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
16297 sig_type = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
16299 /* This is only used to lookup previously recorded types.
16300 If we didn't find it, it's our bug. */
16301 gdb_assert (sig_type != NULL);
16302 gdb_assert (offset.sect_off == sig_type->per_cu.offset.sect_off);
16307 /* Load the DIEs associated with type unit PER_CU into memory. */
16310 load_full_type_unit (struct dwarf2_per_cu_data *per_cu)
16312 struct signatured_type *sig_type;
16314 /* Caller is responsible for ensuring type_unit_groups don't get here. */
16315 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
16317 /* We have the per_cu, but we need the signatured_type.
16318 Fortunately this is an easy translation. */
16319 gdb_assert (per_cu->is_debug_types);
16320 sig_type = (struct signatured_type *) per_cu;
16322 gdb_assert (per_cu->cu == NULL);
16324 read_signatured_type (sig_type);
16326 gdb_assert (per_cu->cu != NULL);
16329 /* die_reader_func for read_signatured_type.
16330 This is identical to load_full_comp_unit_reader,
16331 but is kept separate for now. */
16334 read_signatured_type_reader (const struct die_reader_specs *reader,
16335 gdb_byte *info_ptr,
16336 struct die_info *comp_unit_die,
16340 struct dwarf2_cu *cu = reader->cu;
16342 gdb_assert (cu->die_hash == NULL);
16344 htab_create_alloc_ex (cu->header.length / 12,
16348 &cu->comp_unit_obstack,
16349 hashtab_obstack_allocate,
16350 dummy_obstack_deallocate);
16353 comp_unit_die->child = read_die_and_siblings (reader, info_ptr,
16354 &info_ptr, comp_unit_die);
16355 cu->dies = comp_unit_die;
16356 /* comp_unit_die is not stored in die_hash, no need. */
16358 /* We try not to read any attributes in this function, because not
16359 all CUs needed for references have been loaded yet, and symbol
16360 table processing isn't initialized. But we have to set the CU language,
16361 or we won't be able to build types correctly.
16362 Similarly, if we do not read the producer, we can not apply
16363 producer-specific interpretation. */
16364 prepare_one_comp_unit (cu, cu->dies, language_minimal);
16367 /* Read in a signatured type and build its CU and DIEs.
16368 If the type is a stub for the real type in a DWO file,
16369 read in the real type from the DWO file as well. */
16372 read_signatured_type (struct signatured_type *sig_type)
16374 struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu;
16376 gdb_assert (per_cu->is_debug_types);
16377 gdb_assert (per_cu->cu == NULL);
16379 init_cutu_and_read_dies (per_cu, NULL, 0, 1,
16380 read_signatured_type_reader, NULL);
16383 /* Decode simple location descriptions.
16384 Given a pointer to a dwarf block that defines a location, compute
16385 the location and return the value.
16387 NOTE drow/2003-11-18: This function is called in two situations
16388 now: for the address of static or global variables (partial symbols
16389 only) and for offsets into structures which are expected to be
16390 (more or less) constant. The partial symbol case should go away,
16391 and only the constant case should remain. That will let this
16392 function complain more accurately. A few special modes are allowed
16393 without complaint for global variables (for instance, global
16394 register values and thread-local values).
16396 A location description containing no operations indicates that the
16397 object is optimized out. The return value is 0 for that case.
16398 FIXME drow/2003-11-16: No callers check for this case any more; soon all
16399 callers will only want a very basic result and this can become a
16402 Note that stack[0] is unused except as a default error return. */
16405 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
16407 struct objfile *objfile = cu->objfile;
16409 int size = blk->size;
16410 gdb_byte *data = blk->data;
16411 CORE_ADDR stack[64];
16413 unsigned int bytes_read, unsnd;
16419 stack[++stacki] = 0;
16458 stack[++stacki] = op - DW_OP_lit0;
16493 stack[++stacki] = op - DW_OP_reg0;
16495 dwarf2_complex_location_expr_complaint ();
16499 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
16501 stack[++stacki] = unsnd;
16503 dwarf2_complex_location_expr_complaint ();
16507 stack[++stacki] = read_address (objfile->obfd, &data[i],
16512 case DW_OP_const1u:
16513 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
16517 case DW_OP_const1s:
16518 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
16522 case DW_OP_const2u:
16523 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
16527 case DW_OP_const2s:
16528 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
16532 case DW_OP_const4u:
16533 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
16537 case DW_OP_const4s:
16538 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
16542 case DW_OP_const8u:
16543 stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]);
16548 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
16554 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
16559 stack[stacki + 1] = stack[stacki];
16564 stack[stacki - 1] += stack[stacki];
16568 case DW_OP_plus_uconst:
16569 stack[stacki] += read_unsigned_leb128 (NULL, (data + i),
16575 stack[stacki - 1] -= stack[stacki];
16580 /* If we're not the last op, then we definitely can't encode
16581 this using GDB's address_class enum. This is valid for partial
16582 global symbols, although the variable's address will be bogus
16585 dwarf2_complex_location_expr_complaint ();
16588 case DW_OP_GNU_push_tls_address:
16589 /* The top of the stack has the offset from the beginning
16590 of the thread control block at which the variable is located. */
16591 /* Nothing should follow this operator, so the top of stack would
16593 /* This is valid for partial global symbols, but the variable's
16594 address will be bogus in the psymtab. Make it always at least
16595 non-zero to not look as a variable garbage collected by linker
16596 which have DW_OP_addr 0. */
16598 dwarf2_complex_location_expr_complaint ();
16602 case DW_OP_GNU_uninit:
16605 case DW_OP_GNU_addr_index:
16606 case DW_OP_GNU_const_index:
16607 stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i],
16614 const char *name = get_DW_OP_name (op);
16617 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
16620 complaint (&symfile_complaints, _("unsupported stack op: '%02x'"),
16624 return (stack[stacki]);
16627 /* Enforce maximum stack depth of SIZE-1 to avoid writing
16628 outside of the allocated space. Also enforce minimum>0. */
16629 if (stacki >= ARRAY_SIZE (stack) - 1)
16631 complaint (&symfile_complaints,
16632 _("location description stack overflow"));
16638 complaint (&symfile_complaints,
16639 _("location description stack underflow"));
16643 return (stack[stacki]);
16646 /* memory allocation interface */
16648 static struct dwarf_block *
16649 dwarf_alloc_block (struct dwarf2_cu *cu)
16651 struct dwarf_block *blk;
16653 blk = (struct dwarf_block *)
16654 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
16658 static struct die_info *
16659 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
16661 struct die_info *die;
16662 size_t size = sizeof (struct die_info);
16665 size += (num_attrs - 1) * sizeof (struct attribute);
16667 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
16668 memset (die, 0, sizeof (struct die_info));
16673 /* Macro support. */
16675 /* Return the full name of file number I in *LH's file name table.
16676 Use COMP_DIR as the name of the current directory of the
16677 compilation. The result is allocated using xmalloc; the caller is
16678 responsible for freeing it. */
16680 file_full_name (int file, struct line_header *lh, const char *comp_dir)
16682 /* Is the file number a valid index into the line header's file name
16683 table? Remember that file numbers start with one, not zero. */
16684 if (1 <= file && file <= lh->num_file_names)
16686 struct file_entry *fe = &lh->file_names[file - 1];
16688 if (IS_ABSOLUTE_PATH (fe->name))
16689 return xstrdup (fe->name);
16697 dir = lh->include_dirs[fe->dir_index - 1];
16703 dir_len = strlen (dir);
16704 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
16705 strcpy (full_name, dir);
16706 full_name[dir_len] = '/';
16707 strcpy (full_name + dir_len + 1, fe->name);
16711 return xstrdup (fe->name);
16716 /* The compiler produced a bogus file number. We can at least
16717 record the macro definitions made in the file, even if we
16718 won't be able to find the file by name. */
16719 char fake_name[80];
16721 sprintf (fake_name, "<bad macro file number %d>", file);
16723 complaint (&symfile_complaints,
16724 _("bad file number in macro information (%d)"),
16727 return xstrdup (fake_name);
16732 static struct macro_source_file *
16733 macro_start_file (int file, int line,
16734 struct macro_source_file *current_file,
16735 const char *comp_dir,
16736 struct line_header *lh, struct objfile *objfile)
16738 /* The full name of this source file. */
16739 char *full_name = file_full_name (file, lh, comp_dir);
16741 /* We don't create a macro table for this compilation unit
16742 at all until we actually get a filename. */
16743 if (! pending_macros)
16744 pending_macros = new_macro_table (&objfile->objfile_obstack,
16745 objfile->macro_cache);
16747 if (! current_file)
16749 /* If we have no current file, then this must be the start_file
16750 directive for the compilation unit's main source file. */
16751 current_file = macro_set_main (pending_macros, full_name);
16752 macro_define_special (pending_macros);
16755 current_file = macro_include (current_file, line, full_name);
16759 return current_file;
16763 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
16764 followed by a null byte. */
16766 copy_string (const char *buf, int len)
16768 char *s = xmalloc (len + 1);
16770 memcpy (s, buf, len);
16776 static const char *
16777 consume_improper_spaces (const char *p, const char *body)
16781 complaint (&symfile_complaints,
16782 _("macro definition contains spaces "
16783 "in formal argument list:\n`%s'"),
16795 parse_macro_definition (struct macro_source_file *file, int line,
16800 /* The body string takes one of two forms. For object-like macro
16801 definitions, it should be:
16803 <macro name> " " <definition>
16805 For function-like macro definitions, it should be:
16807 <macro name> "() " <definition>
16809 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
16811 Spaces may appear only where explicitly indicated, and in the
16814 The Dwarf 2 spec says that an object-like macro's name is always
16815 followed by a space, but versions of GCC around March 2002 omit
16816 the space when the macro's definition is the empty string.
16818 The Dwarf 2 spec says that there should be no spaces between the
16819 formal arguments in a function-like macro's formal argument list,
16820 but versions of GCC around March 2002 include spaces after the
16824 /* Find the extent of the macro name. The macro name is terminated
16825 by either a space or null character (for an object-like macro) or
16826 an opening paren (for a function-like macro). */
16827 for (p = body; *p; p++)
16828 if (*p == ' ' || *p == '(')
16831 if (*p == ' ' || *p == '\0')
16833 /* It's an object-like macro. */
16834 int name_len = p - body;
16835 char *name = copy_string (body, name_len);
16836 const char *replacement;
16839 replacement = body + name_len + 1;
16842 dwarf2_macro_malformed_definition_complaint (body);
16843 replacement = body + name_len;
16846 macro_define_object (file, line, name, replacement);
16850 else if (*p == '(')
16852 /* It's a function-like macro. */
16853 char *name = copy_string (body, p - body);
16856 char **argv = xmalloc (argv_size * sizeof (*argv));
16860 p = consume_improper_spaces (p, body);
16862 /* Parse the formal argument list. */
16863 while (*p && *p != ')')
16865 /* Find the extent of the current argument name. */
16866 const char *arg_start = p;
16868 while (*p && *p != ',' && *p != ')' && *p != ' ')
16871 if (! *p || p == arg_start)
16872 dwarf2_macro_malformed_definition_complaint (body);
16875 /* Make sure argv has room for the new argument. */
16876 if (argc >= argv_size)
16879 argv = xrealloc (argv, argv_size * sizeof (*argv));
16882 argv[argc++] = copy_string (arg_start, p - arg_start);
16885 p = consume_improper_spaces (p, body);
16887 /* Consume the comma, if present. */
16892 p = consume_improper_spaces (p, body);
16901 /* Perfectly formed definition, no complaints. */
16902 macro_define_function (file, line, name,
16903 argc, (const char **) argv,
16905 else if (*p == '\0')
16907 /* Complain, but do define it. */
16908 dwarf2_macro_malformed_definition_complaint (body);
16909 macro_define_function (file, line, name,
16910 argc, (const char **) argv,
16914 /* Just complain. */
16915 dwarf2_macro_malformed_definition_complaint (body);
16918 /* Just complain. */
16919 dwarf2_macro_malformed_definition_complaint (body);
16925 for (i = 0; i < argc; i++)
16931 dwarf2_macro_malformed_definition_complaint (body);
16934 /* Skip some bytes from BYTES according to the form given in FORM.
16935 Returns the new pointer. */
16938 skip_form_bytes (bfd *abfd, gdb_byte *bytes, gdb_byte *buffer_end,
16939 enum dwarf_form form,
16940 unsigned int offset_size,
16941 struct dwarf2_section_info *section)
16943 unsigned int bytes_read;
16947 case DW_FORM_data1:
16952 case DW_FORM_data2:
16956 case DW_FORM_data4:
16960 case DW_FORM_data8:
16964 case DW_FORM_string:
16965 read_direct_string (abfd, bytes, &bytes_read);
16966 bytes += bytes_read;
16969 case DW_FORM_sec_offset:
16971 bytes += offset_size;
16974 case DW_FORM_block:
16975 bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read);
16976 bytes += bytes_read;
16979 case DW_FORM_block1:
16980 bytes += 1 + read_1_byte (abfd, bytes);
16982 case DW_FORM_block2:
16983 bytes += 2 + read_2_bytes (abfd, bytes);
16985 case DW_FORM_block4:
16986 bytes += 4 + read_4_bytes (abfd, bytes);
16989 case DW_FORM_sdata:
16990 case DW_FORM_udata:
16991 case DW_FORM_GNU_addr_index:
16992 case DW_FORM_GNU_str_index:
16993 bytes = (gdb_byte *) gdb_skip_leb128 (bytes, buffer_end);
16996 dwarf2_section_buffer_overflow_complaint (section);
17004 complaint (&symfile_complaints,
17005 _("invalid form 0x%x in `%s'"),
17007 section->asection->name);
17015 /* A helper for dwarf_decode_macros that handles skipping an unknown
17016 opcode. Returns an updated pointer to the macro data buffer; or,
17017 on error, issues a complaint and returns NULL. */
17020 skip_unknown_opcode (unsigned int opcode,
17021 gdb_byte **opcode_definitions,
17022 gdb_byte *mac_ptr, gdb_byte *mac_end,
17024 unsigned int offset_size,
17025 struct dwarf2_section_info *section)
17027 unsigned int bytes_read, i;
17031 if (opcode_definitions[opcode] == NULL)
17033 complaint (&symfile_complaints,
17034 _("unrecognized DW_MACFINO opcode 0x%x"),
17039 defn = opcode_definitions[opcode];
17040 arg = read_unsigned_leb128 (abfd, defn, &bytes_read);
17041 defn += bytes_read;
17043 for (i = 0; i < arg; ++i)
17045 mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size,
17047 if (mac_ptr == NULL)
17049 /* skip_form_bytes already issued the complaint. */
17057 /* A helper function which parses the header of a macro section.
17058 If the macro section is the extended (for now called "GNU") type,
17059 then this updates *OFFSET_SIZE. Returns a pointer to just after
17060 the header, or issues a complaint and returns NULL on error. */
17063 dwarf_parse_macro_header (gdb_byte **opcode_definitions,
17066 unsigned int *offset_size,
17067 int section_is_gnu)
17069 memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *));
17071 if (section_is_gnu)
17073 unsigned int version, flags;
17075 version = read_2_bytes (abfd, mac_ptr);
17078 complaint (&symfile_complaints,
17079 _("unrecognized version `%d' in .debug_macro section"),
17085 flags = read_1_byte (abfd, mac_ptr);
17087 *offset_size = (flags & 1) ? 8 : 4;
17089 if ((flags & 2) != 0)
17090 /* We don't need the line table offset. */
17091 mac_ptr += *offset_size;
17093 /* Vendor opcode descriptions. */
17094 if ((flags & 4) != 0)
17096 unsigned int i, count;
17098 count = read_1_byte (abfd, mac_ptr);
17100 for (i = 0; i < count; ++i)
17102 unsigned int opcode, bytes_read;
17105 opcode = read_1_byte (abfd, mac_ptr);
17107 opcode_definitions[opcode] = mac_ptr;
17108 arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17109 mac_ptr += bytes_read;
17118 /* A helper for dwarf_decode_macros that handles the GNU extensions,
17119 including DW_MACRO_GNU_transparent_include. */
17122 dwarf_decode_macro_bytes (bfd *abfd, gdb_byte *mac_ptr, gdb_byte *mac_end,
17123 struct macro_source_file *current_file,
17124 struct line_header *lh, char *comp_dir,
17125 struct dwarf2_section_info *section,
17126 int section_is_gnu,
17127 unsigned int offset_size,
17128 struct objfile *objfile,
17129 htab_t include_hash)
17131 enum dwarf_macro_record_type macinfo_type;
17132 int at_commandline;
17133 gdb_byte *opcode_definitions[256];
17135 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
17136 &offset_size, section_is_gnu);
17137 if (mac_ptr == NULL)
17139 /* We already issued a complaint. */
17143 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
17144 GDB is still reading the definitions from command line. First
17145 DW_MACINFO_start_file will need to be ignored as it was already executed
17146 to create CURRENT_FILE for the main source holding also the command line
17147 definitions. On first met DW_MACINFO_start_file this flag is reset to
17148 normally execute all the remaining DW_MACINFO_start_file macinfos. */
17150 at_commandline = 1;
17154 /* Do we at least have room for a macinfo type byte? */
17155 if (mac_ptr >= mac_end)
17157 dwarf2_section_buffer_overflow_complaint (section);
17161 macinfo_type = read_1_byte (abfd, mac_ptr);
17164 /* Note that we rely on the fact that the corresponding GNU and
17165 DWARF constants are the same. */
17166 switch (macinfo_type)
17168 /* A zero macinfo type indicates the end of the macro
17173 case DW_MACRO_GNU_define:
17174 case DW_MACRO_GNU_undef:
17175 case DW_MACRO_GNU_define_indirect:
17176 case DW_MACRO_GNU_undef_indirect:
17178 unsigned int bytes_read;
17183 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17184 mac_ptr += bytes_read;
17186 if (macinfo_type == DW_MACRO_GNU_define
17187 || macinfo_type == DW_MACRO_GNU_undef)
17189 body = read_direct_string (abfd, mac_ptr, &bytes_read);
17190 mac_ptr += bytes_read;
17194 LONGEST str_offset;
17196 str_offset = read_offset_1 (abfd, mac_ptr, offset_size);
17197 mac_ptr += offset_size;
17199 body = read_indirect_string_at_offset (abfd, str_offset);
17202 is_define = (macinfo_type == DW_MACRO_GNU_define
17203 || macinfo_type == DW_MACRO_GNU_define_indirect);
17204 if (! current_file)
17206 /* DWARF violation as no main source is present. */
17207 complaint (&symfile_complaints,
17208 _("debug info with no main source gives macro %s "
17210 is_define ? _("definition") : _("undefinition"),
17214 if ((line == 0 && !at_commandline)
17215 || (line != 0 && at_commandline))
17216 complaint (&symfile_complaints,
17217 _("debug info gives %s macro %s with %s line %d: %s"),
17218 at_commandline ? _("command-line") : _("in-file"),
17219 is_define ? _("definition") : _("undefinition"),
17220 line == 0 ? _("zero") : _("non-zero"), line, body);
17223 parse_macro_definition (current_file, line, body);
17226 gdb_assert (macinfo_type == DW_MACRO_GNU_undef
17227 || macinfo_type == DW_MACRO_GNU_undef_indirect);
17228 macro_undef (current_file, line, body);
17233 case DW_MACRO_GNU_start_file:
17235 unsigned int bytes_read;
17238 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17239 mac_ptr += bytes_read;
17240 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17241 mac_ptr += bytes_read;
17243 if ((line == 0 && !at_commandline)
17244 || (line != 0 && at_commandline))
17245 complaint (&symfile_complaints,
17246 _("debug info gives source %d included "
17247 "from %s at %s line %d"),
17248 file, at_commandline ? _("command-line") : _("file"),
17249 line == 0 ? _("zero") : _("non-zero"), line);
17251 if (at_commandline)
17253 /* This DW_MACRO_GNU_start_file was executed in the
17255 at_commandline = 0;
17258 current_file = macro_start_file (file, line,
17259 current_file, comp_dir,
17264 case DW_MACRO_GNU_end_file:
17265 if (! current_file)
17266 complaint (&symfile_complaints,
17267 _("macro debug info has an unmatched "
17268 "`close_file' directive"));
17271 current_file = current_file->included_by;
17272 if (! current_file)
17274 enum dwarf_macro_record_type next_type;
17276 /* GCC circa March 2002 doesn't produce the zero
17277 type byte marking the end of the compilation
17278 unit. Complain if it's not there, but exit no
17281 /* Do we at least have room for a macinfo type byte? */
17282 if (mac_ptr >= mac_end)
17284 dwarf2_section_buffer_overflow_complaint (section);
17288 /* We don't increment mac_ptr here, so this is just
17290 next_type = read_1_byte (abfd, mac_ptr);
17291 if (next_type != 0)
17292 complaint (&symfile_complaints,
17293 _("no terminating 0-type entry for "
17294 "macros in `.debug_macinfo' section"));
17301 case DW_MACRO_GNU_transparent_include:
17306 offset = read_offset_1 (abfd, mac_ptr, offset_size);
17307 mac_ptr += offset_size;
17309 slot = htab_find_slot (include_hash, mac_ptr, INSERT);
17312 /* This has actually happened; see
17313 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
17314 complaint (&symfile_complaints,
17315 _("recursive DW_MACRO_GNU_transparent_include in "
17316 ".debug_macro section"));
17322 dwarf_decode_macro_bytes (abfd,
17323 section->buffer + offset,
17324 mac_end, current_file,
17326 section, section_is_gnu,
17327 offset_size, objfile, include_hash);
17329 htab_remove_elt (include_hash, mac_ptr);
17334 case DW_MACINFO_vendor_ext:
17335 if (!section_is_gnu)
17337 unsigned int bytes_read;
17340 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17341 mac_ptr += bytes_read;
17342 read_direct_string (abfd, mac_ptr, &bytes_read);
17343 mac_ptr += bytes_read;
17345 /* We don't recognize any vendor extensions. */
17351 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
17352 mac_ptr, mac_end, abfd, offset_size,
17354 if (mac_ptr == NULL)
17358 } while (macinfo_type != 0);
17362 dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset,
17363 char *comp_dir, int section_is_gnu)
17365 struct objfile *objfile = dwarf2_per_objfile->objfile;
17366 struct line_header *lh = cu->line_header;
17368 gdb_byte *mac_ptr, *mac_end;
17369 struct macro_source_file *current_file = 0;
17370 enum dwarf_macro_record_type macinfo_type;
17371 unsigned int offset_size = cu->header.offset_size;
17372 gdb_byte *opcode_definitions[256];
17373 struct cleanup *cleanup;
17374 htab_t include_hash;
17376 struct dwarf2_section_info *section;
17377 const char *section_name;
17379 if (cu->dwo_unit != NULL)
17381 if (section_is_gnu)
17383 section = &cu->dwo_unit->dwo_file->sections.macro;
17384 section_name = ".debug_macro.dwo";
17388 section = &cu->dwo_unit->dwo_file->sections.macinfo;
17389 section_name = ".debug_macinfo.dwo";
17394 if (section_is_gnu)
17396 section = &dwarf2_per_objfile->macro;
17397 section_name = ".debug_macro";
17401 section = &dwarf2_per_objfile->macinfo;
17402 section_name = ".debug_macinfo";
17406 dwarf2_read_section (objfile, section);
17407 if (section->buffer == NULL)
17409 complaint (&symfile_complaints, _("missing %s section"), section_name);
17412 abfd = section->asection->owner;
17414 /* First pass: Find the name of the base filename.
17415 This filename is needed in order to process all macros whose definition
17416 (or undefinition) comes from the command line. These macros are defined
17417 before the first DW_MACINFO_start_file entry, and yet still need to be
17418 associated to the base file.
17420 To determine the base file name, we scan the macro definitions until we
17421 reach the first DW_MACINFO_start_file entry. We then initialize
17422 CURRENT_FILE accordingly so that any macro definition found before the
17423 first DW_MACINFO_start_file can still be associated to the base file. */
17425 mac_ptr = section->buffer + offset;
17426 mac_end = section->buffer + section->size;
17428 mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr,
17429 &offset_size, section_is_gnu);
17430 if (mac_ptr == NULL)
17432 /* We already issued a complaint. */
17438 /* Do we at least have room for a macinfo type byte? */
17439 if (mac_ptr >= mac_end)
17441 /* Complaint is printed during the second pass as GDB will probably
17442 stop the first pass earlier upon finding
17443 DW_MACINFO_start_file. */
17447 macinfo_type = read_1_byte (abfd, mac_ptr);
17450 /* Note that we rely on the fact that the corresponding GNU and
17451 DWARF constants are the same. */
17452 switch (macinfo_type)
17454 /* A zero macinfo type indicates the end of the macro
17459 case DW_MACRO_GNU_define:
17460 case DW_MACRO_GNU_undef:
17461 /* Only skip the data by MAC_PTR. */
17463 unsigned int bytes_read;
17465 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17466 mac_ptr += bytes_read;
17467 read_direct_string (abfd, mac_ptr, &bytes_read);
17468 mac_ptr += bytes_read;
17472 case DW_MACRO_GNU_start_file:
17474 unsigned int bytes_read;
17477 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17478 mac_ptr += bytes_read;
17479 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17480 mac_ptr += bytes_read;
17482 current_file = macro_start_file (file, line, current_file,
17483 comp_dir, lh, objfile);
17487 case DW_MACRO_GNU_end_file:
17488 /* No data to skip by MAC_PTR. */
17491 case DW_MACRO_GNU_define_indirect:
17492 case DW_MACRO_GNU_undef_indirect:
17494 unsigned int bytes_read;
17496 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17497 mac_ptr += bytes_read;
17498 mac_ptr += offset_size;
17502 case DW_MACRO_GNU_transparent_include:
17503 /* Note that, according to the spec, a transparent include
17504 chain cannot call DW_MACRO_GNU_start_file. So, we can just
17505 skip this opcode. */
17506 mac_ptr += offset_size;
17509 case DW_MACINFO_vendor_ext:
17510 /* Only skip the data by MAC_PTR. */
17511 if (!section_is_gnu)
17513 unsigned int bytes_read;
17515 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
17516 mac_ptr += bytes_read;
17517 read_direct_string (abfd, mac_ptr, &bytes_read);
17518 mac_ptr += bytes_read;
17523 mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions,
17524 mac_ptr, mac_end, abfd, offset_size,
17526 if (mac_ptr == NULL)
17530 } while (macinfo_type != 0 && current_file == NULL);
17532 /* Second pass: Process all entries.
17534 Use the AT_COMMAND_LINE flag to determine whether we are still processing
17535 command-line macro definitions/undefinitions. This flag is unset when we
17536 reach the first DW_MACINFO_start_file entry. */
17538 include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer,
17539 NULL, xcalloc, xfree);
17540 cleanup = make_cleanup_htab_delete (include_hash);
17541 mac_ptr = section->buffer + offset;
17542 slot = htab_find_slot (include_hash, mac_ptr, INSERT);
17544 dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end,
17545 current_file, lh, comp_dir, section, section_is_gnu,
17546 offset_size, objfile, include_hash);
17547 do_cleanups (cleanup);
17550 /* Check if the attribute's form is a DW_FORM_block*
17551 if so return true else false. */
17554 attr_form_is_block (struct attribute *attr)
17556 return (attr == NULL ? 0 :
17557 attr->form == DW_FORM_block1
17558 || attr->form == DW_FORM_block2
17559 || attr->form == DW_FORM_block4
17560 || attr->form == DW_FORM_block
17561 || attr->form == DW_FORM_exprloc);
17564 /* Return non-zero if ATTR's value is a section offset --- classes
17565 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
17566 You may use DW_UNSND (attr) to retrieve such offsets.
17568 Section 7.5.4, "Attribute Encodings", explains that no attribute
17569 may have a value that belongs to more than one of these classes; it
17570 would be ambiguous if we did, because we use the same forms for all
17574 attr_form_is_section_offset (struct attribute *attr)
17576 return (attr->form == DW_FORM_data4
17577 || attr->form == DW_FORM_data8
17578 || attr->form == DW_FORM_sec_offset);
17581 /* Return non-zero if ATTR's value falls in the 'constant' class, or
17582 zero otherwise. When this function returns true, you can apply
17583 dwarf2_get_attr_constant_value to it.
17585 However, note that for some attributes you must check
17586 attr_form_is_section_offset before using this test. DW_FORM_data4
17587 and DW_FORM_data8 are members of both the constant class, and of
17588 the classes that contain offsets into other debug sections
17589 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
17590 that, if an attribute's can be either a constant or one of the
17591 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
17592 taken as section offsets, not constants. */
17595 attr_form_is_constant (struct attribute *attr)
17597 switch (attr->form)
17599 case DW_FORM_sdata:
17600 case DW_FORM_udata:
17601 case DW_FORM_data1:
17602 case DW_FORM_data2:
17603 case DW_FORM_data4:
17604 case DW_FORM_data8:
17611 /* Return the .debug_loc section to use for CU.
17612 For DWO files use .debug_loc.dwo. */
17614 static struct dwarf2_section_info *
17615 cu_debug_loc_section (struct dwarf2_cu *cu)
17618 return &cu->dwo_unit->dwo_file->sections.loc;
17619 return &dwarf2_per_objfile->loc;
17622 /* A helper function that fills in a dwarf2_loclist_baton. */
17625 fill_in_loclist_baton (struct dwarf2_cu *cu,
17626 struct dwarf2_loclist_baton *baton,
17627 struct attribute *attr)
17629 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
17631 dwarf2_read_section (dwarf2_per_objfile->objfile, section);
17633 baton->per_cu = cu->per_cu;
17634 gdb_assert (baton->per_cu);
17635 /* We don't know how long the location list is, but make sure we
17636 don't run off the edge of the section. */
17637 baton->size = section->size - DW_UNSND (attr);
17638 baton->data = section->buffer + DW_UNSND (attr);
17639 baton->base_address = cu->base_address;
17640 baton->from_dwo = cu->dwo_unit != NULL;
17644 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
17645 struct dwarf2_cu *cu)
17647 struct objfile *objfile = dwarf2_per_objfile->objfile;
17648 struct dwarf2_section_info *section = cu_debug_loc_section (cu);
17650 if (attr_form_is_section_offset (attr)
17651 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
17652 the section. If so, fall through to the complaint in the
17654 && DW_UNSND (attr) < dwarf2_section_size (objfile, section))
17656 struct dwarf2_loclist_baton *baton;
17658 baton = obstack_alloc (&objfile->objfile_obstack,
17659 sizeof (struct dwarf2_loclist_baton));
17661 fill_in_loclist_baton (cu, baton, attr);
17663 if (cu->base_known == 0)
17664 complaint (&symfile_complaints,
17665 _("Location list used without "
17666 "specifying the CU base address."));
17668 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
17669 SYMBOL_LOCATION_BATON (sym) = baton;
17673 struct dwarf2_locexpr_baton *baton;
17675 baton = obstack_alloc (&objfile->objfile_obstack,
17676 sizeof (struct dwarf2_locexpr_baton));
17677 baton->per_cu = cu->per_cu;
17678 gdb_assert (baton->per_cu);
17680 if (attr_form_is_block (attr))
17682 /* Note that we're just copying the block's data pointer
17683 here, not the actual data. We're still pointing into the
17684 info_buffer for SYM's objfile; right now we never release
17685 that buffer, but when we do clean up properly this may
17687 baton->size = DW_BLOCK (attr)->size;
17688 baton->data = DW_BLOCK (attr)->data;
17692 dwarf2_invalid_attrib_class_complaint ("location description",
17693 SYMBOL_NATURAL_NAME (sym));
17697 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
17698 SYMBOL_LOCATION_BATON (sym) = baton;
17702 /* Return the OBJFILE associated with the compilation unit CU. If CU
17703 came from a separate debuginfo file, then the master objfile is
17707 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
17709 struct objfile *objfile = per_cu->objfile;
17711 /* Return the master objfile, so that we can report and look up the
17712 correct file containing this variable. */
17713 if (objfile->separate_debug_objfile_backlink)
17714 objfile = objfile->separate_debug_objfile_backlink;
17719 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
17720 (CU_HEADERP is unused in such case) or prepare a temporary copy at
17721 CU_HEADERP first. */
17723 static const struct comp_unit_head *
17724 per_cu_header_read_in (struct comp_unit_head *cu_headerp,
17725 struct dwarf2_per_cu_data *per_cu)
17727 gdb_byte *info_ptr;
17730 return &per_cu->cu->header;
17732 info_ptr = per_cu->info_or_types_section->buffer + per_cu->offset.sect_off;
17734 memset (cu_headerp, 0, sizeof (*cu_headerp));
17735 read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd);
17740 /* Return the address size given in the compilation unit header for CU. */
17743 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
17745 struct comp_unit_head cu_header_local;
17746 const struct comp_unit_head *cu_headerp;
17748 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
17750 return cu_headerp->addr_size;
17753 /* Return the offset size given in the compilation unit header for CU. */
17756 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu)
17758 struct comp_unit_head cu_header_local;
17759 const struct comp_unit_head *cu_headerp;
17761 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
17763 return cu_headerp->offset_size;
17766 /* See its dwarf2loc.h declaration. */
17769 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu)
17771 struct comp_unit_head cu_header_local;
17772 const struct comp_unit_head *cu_headerp;
17774 cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu);
17776 if (cu_headerp->version == 2)
17777 return cu_headerp->addr_size;
17779 return cu_headerp->offset_size;
17782 /* Return the text offset of the CU. The returned offset comes from
17783 this CU's objfile. If this objfile came from a separate debuginfo
17784 file, then the offset may be different from the corresponding
17785 offset in the parent objfile. */
17788 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu)
17790 struct objfile *objfile = per_cu->objfile;
17792 return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
17795 /* Locate the .debug_info compilation unit from CU's objfile which contains
17796 the DIE at OFFSET. Raises an error on failure. */
17798 static struct dwarf2_per_cu_data *
17799 dwarf2_find_containing_comp_unit (sect_offset offset,
17800 struct objfile *objfile)
17802 struct dwarf2_per_cu_data *this_cu;
17806 high = dwarf2_per_objfile->n_comp_units - 1;
17809 int mid = low + (high - low) / 2;
17811 if (dwarf2_per_objfile->all_comp_units[mid]->offset.sect_off
17812 >= offset.sect_off)
17817 gdb_assert (low == high);
17818 if (dwarf2_per_objfile->all_comp_units[low]->offset.sect_off
17822 error (_("Dwarf Error: could not find partial DIE containing "
17823 "offset 0x%lx [in module %s]"),
17824 (long) offset.sect_off, bfd_get_filename (objfile->obfd));
17826 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off
17827 <= offset.sect_off);
17828 return dwarf2_per_objfile->all_comp_units[low-1];
17832 this_cu = dwarf2_per_objfile->all_comp_units[low];
17833 if (low == dwarf2_per_objfile->n_comp_units - 1
17834 && offset.sect_off >= this_cu->offset.sect_off + this_cu->length)
17835 error (_("invalid dwarf2 offset %u"), offset.sect_off);
17836 gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length);
17841 /* Initialize dwarf2_cu CU, owned by PER_CU. */
17844 init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu)
17846 memset (cu, 0, sizeof (*cu));
17848 cu->per_cu = per_cu;
17849 cu->objfile = per_cu->objfile;
17850 obstack_init (&cu->comp_unit_obstack);
17853 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
17856 prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die,
17857 enum language pretend_language)
17859 struct attribute *attr;
17861 /* Set the language we're debugging. */
17862 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
17864 set_cu_language (DW_UNSND (attr), cu);
17867 cu->language = pretend_language;
17868 cu->language_defn = language_def (cu->language);
17871 attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu);
17873 cu->producer = DW_STRING (attr);
17876 /* Release one cached compilation unit, CU. We unlink it from the tree
17877 of compilation units, but we don't remove it from the read_in_chain;
17878 the caller is responsible for that.
17879 NOTE: DATA is a void * because this function is also used as a
17880 cleanup routine. */
17883 free_heap_comp_unit (void *data)
17885 struct dwarf2_cu *cu = data;
17887 gdb_assert (cu->per_cu != NULL);
17888 cu->per_cu->cu = NULL;
17891 obstack_free (&cu->comp_unit_obstack, NULL);
17896 /* This cleanup function is passed the address of a dwarf2_cu on the stack
17897 when we're finished with it. We can't free the pointer itself, but be
17898 sure to unlink it from the cache. Also release any associated storage. */
17901 free_stack_comp_unit (void *data)
17903 struct dwarf2_cu *cu = data;
17905 gdb_assert (cu->per_cu != NULL);
17906 cu->per_cu->cu = NULL;
17909 obstack_free (&cu->comp_unit_obstack, NULL);
17910 cu->partial_dies = NULL;
17913 /* Free all cached compilation units. */
17916 free_cached_comp_units (void *data)
17918 struct dwarf2_per_cu_data *per_cu, **last_chain;
17920 per_cu = dwarf2_per_objfile->read_in_chain;
17921 last_chain = &dwarf2_per_objfile->read_in_chain;
17922 while (per_cu != NULL)
17924 struct dwarf2_per_cu_data *next_cu;
17926 next_cu = per_cu->cu->read_in_chain;
17928 free_heap_comp_unit (per_cu->cu);
17929 *last_chain = next_cu;
17935 /* Increase the age counter on each cached compilation unit, and free
17936 any that are too old. */
17939 age_cached_comp_units (void)
17941 struct dwarf2_per_cu_data *per_cu, **last_chain;
17943 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
17944 per_cu = dwarf2_per_objfile->read_in_chain;
17945 while (per_cu != NULL)
17947 per_cu->cu->last_used ++;
17948 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
17949 dwarf2_mark (per_cu->cu);
17950 per_cu = per_cu->cu->read_in_chain;
17953 per_cu = dwarf2_per_objfile->read_in_chain;
17954 last_chain = &dwarf2_per_objfile->read_in_chain;
17955 while (per_cu != NULL)
17957 struct dwarf2_per_cu_data *next_cu;
17959 next_cu = per_cu->cu->read_in_chain;
17961 if (!per_cu->cu->mark)
17963 free_heap_comp_unit (per_cu->cu);
17964 *last_chain = next_cu;
17967 last_chain = &per_cu->cu->read_in_chain;
17973 /* Remove a single compilation unit from the cache. */
17976 free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu)
17978 struct dwarf2_per_cu_data *per_cu, **last_chain;
17980 per_cu = dwarf2_per_objfile->read_in_chain;
17981 last_chain = &dwarf2_per_objfile->read_in_chain;
17982 while (per_cu != NULL)
17984 struct dwarf2_per_cu_data *next_cu;
17986 next_cu = per_cu->cu->read_in_chain;
17988 if (per_cu == target_per_cu)
17990 free_heap_comp_unit (per_cu->cu);
17992 *last_chain = next_cu;
17996 last_chain = &per_cu->cu->read_in_chain;
18002 /* Release all extra memory associated with OBJFILE. */
18005 dwarf2_free_objfile (struct objfile *objfile)
18007 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
18009 if (dwarf2_per_objfile == NULL)
18012 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
18013 free_cached_comp_units (NULL);
18015 if (dwarf2_per_objfile->quick_file_names_table)
18016 htab_delete (dwarf2_per_objfile->quick_file_names_table);
18018 /* Everything else should be on the objfile obstack. */
18021 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
18022 We store these in a hash table separate from the DIEs, and preserve them
18023 when the DIEs are flushed out of cache.
18025 The CU "per_cu" pointer is needed because offset alone is not enough to
18026 uniquely identify the type. A file may have multiple .debug_types sections,
18027 or the type may come from a DWO file. We have to use something in
18028 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
18029 routine, get_die_type_at_offset, from outside this file, and thus won't
18030 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
18033 struct dwarf2_per_cu_offset_and_type
18035 const struct dwarf2_per_cu_data *per_cu;
18036 sect_offset offset;
18040 /* Hash function for a dwarf2_per_cu_offset_and_type. */
18043 per_cu_offset_and_type_hash (const void *item)
18045 const struct dwarf2_per_cu_offset_and_type *ofs = item;
18047 return (uintptr_t) ofs->per_cu + ofs->offset.sect_off;
18050 /* Equality function for a dwarf2_per_cu_offset_and_type. */
18053 per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs)
18055 const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs;
18056 const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs;
18058 return (ofs_lhs->per_cu == ofs_rhs->per_cu
18059 && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off);
18062 /* Set the type associated with DIE to TYPE. Save it in CU's hash
18063 table if necessary. For convenience, return TYPE.
18065 The DIEs reading must have careful ordering to:
18066 * Not cause infite loops trying to read in DIEs as a prerequisite for
18067 reading current DIE.
18068 * Not trying to dereference contents of still incompletely read in types
18069 while reading in other DIEs.
18070 * Enable referencing still incompletely read in types just by a pointer to
18071 the type without accessing its fields.
18073 Therefore caller should follow these rules:
18074 * Try to fetch any prerequisite types we may need to build this DIE type
18075 before building the type and calling set_die_type.
18076 * After building type call set_die_type for current DIE as soon as
18077 possible before fetching more types to complete the current type.
18078 * Make the type as complete as possible before fetching more types. */
18080 static struct type *
18081 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
18083 struct dwarf2_per_cu_offset_and_type **slot, ofs;
18084 struct objfile *objfile = cu->objfile;
18086 /* For Ada types, make sure that the gnat-specific data is always
18087 initialized (if not already set). There are a few types where
18088 we should not be doing so, because the type-specific area is
18089 already used to hold some other piece of info (eg: TYPE_CODE_FLT
18090 where the type-specific area is used to store the floatformat).
18091 But this is not a problem, because the gnat-specific information
18092 is actually not needed for these types. */
18093 if (need_gnat_info (cu)
18094 && TYPE_CODE (type) != TYPE_CODE_FUNC
18095 && TYPE_CODE (type) != TYPE_CODE_FLT
18096 && !HAVE_GNAT_AUX_INFO (type))
18097 INIT_GNAT_SPECIFIC (type);
18099 if (dwarf2_per_objfile->die_type_hash == NULL)
18101 dwarf2_per_objfile->die_type_hash =
18102 htab_create_alloc_ex (127,
18103 per_cu_offset_and_type_hash,
18104 per_cu_offset_and_type_eq,
18106 &objfile->objfile_obstack,
18107 hashtab_obstack_allocate,
18108 dummy_obstack_deallocate);
18111 ofs.per_cu = cu->per_cu;
18112 ofs.offset = die->offset;
18114 slot = (struct dwarf2_per_cu_offset_and_type **)
18115 htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT);
18117 complaint (&symfile_complaints,
18118 _("A problem internal to GDB: DIE 0x%x has type already set"),
18119 die->offset.sect_off);
18120 *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
18125 /* Look up the type for the die at OFFSET in the appropriate type_hash
18126 table, or return NULL if the die does not have a saved type. */
18128 static struct type *
18129 get_die_type_at_offset (sect_offset offset,
18130 struct dwarf2_per_cu_data *per_cu)
18132 struct dwarf2_per_cu_offset_and_type *slot, ofs;
18134 if (dwarf2_per_objfile->die_type_hash == NULL)
18137 ofs.per_cu = per_cu;
18138 ofs.offset = offset;
18139 slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs);
18146 /* Look up the type for DIE in the appropriate type_hash table,
18147 or return NULL if DIE does not have a saved type. */
18149 static struct type *
18150 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
18152 return get_die_type_at_offset (die->offset, cu->per_cu);
18155 /* Add a dependence relationship from CU to REF_PER_CU. */
18158 dwarf2_add_dependence (struct dwarf2_cu *cu,
18159 struct dwarf2_per_cu_data *ref_per_cu)
18163 if (cu->dependencies == NULL)
18165 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
18166 NULL, &cu->comp_unit_obstack,
18167 hashtab_obstack_allocate,
18168 dummy_obstack_deallocate);
18170 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
18172 *slot = ref_per_cu;
18175 /* Subroutine of dwarf2_mark to pass to htab_traverse.
18176 Set the mark field in every compilation unit in the
18177 cache that we must keep because we are keeping CU. */
18180 dwarf2_mark_helper (void **slot, void *data)
18182 struct dwarf2_per_cu_data *per_cu;
18184 per_cu = (struct dwarf2_per_cu_data *) *slot;
18186 /* cu->dependencies references may not yet have been ever read if QUIT aborts
18187 reading of the chain. As such dependencies remain valid it is not much
18188 useful to track and undo them during QUIT cleanups. */
18189 if (per_cu->cu == NULL)
18192 if (per_cu->cu->mark)
18194 per_cu->cu->mark = 1;
18196 if (per_cu->cu->dependencies != NULL)
18197 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
18202 /* Set the mark field in CU and in every other compilation unit in the
18203 cache that we must keep because we are keeping CU. */
18206 dwarf2_mark (struct dwarf2_cu *cu)
18211 if (cu->dependencies != NULL)
18212 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
18216 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
18220 per_cu->cu->mark = 0;
18221 per_cu = per_cu->cu->read_in_chain;
18225 /* Trivial hash function for partial_die_info: the hash value of a DIE
18226 is its offset in .debug_info for this objfile. */
18229 partial_die_hash (const void *item)
18231 const struct partial_die_info *part_die = item;
18233 return part_die->offset.sect_off;
18236 /* Trivial comparison function for partial_die_info structures: two DIEs
18237 are equal if they have the same offset. */
18240 partial_die_eq (const void *item_lhs, const void *item_rhs)
18242 const struct partial_die_info *part_die_lhs = item_lhs;
18243 const struct partial_die_info *part_die_rhs = item_rhs;
18245 return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off;
18248 static struct cmd_list_element *set_dwarf2_cmdlist;
18249 static struct cmd_list_element *show_dwarf2_cmdlist;
18252 set_dwarf2_cmd (char *args, int from_tty)
18254 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
18258 show_dwarf2_cmd (char *args, int from_tty)
18260 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
18263 /* If section described by INFO was mmapped, munmap it now. */
18266 munmap_section_buffer (struct dwarf2_section_info *info)
18268 if (info->map_addr != NULL)
18273 res = munmap (info->map_addr, info->map_len);
18274 gdb_assert (res == 0);
18276 /* Without HAVE_MMAP, we should never be here to begin with. */
18277 gdb_assert_not_reached ("no mmap support");
18282 /* munmap debug sections for OBJFILE, if necessary. */
18285 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
18287 struct dwarf2_per_objfile *data = d;
18289 struct dwarf2_section_info *section;
18291 /* This is sorted according to the order they're defined in to make it easier
18292 to keep in sync. */
18293 munmap_section_buffer (&data->info);
18294 munmap_section_buffer (&data->abbrev);
18295 munmap_section_buffer (&data->line);
18296 munmap_section_buffer (&data->loc);
18297 munmap_section_buffer (&data->macinfo);
18298 munmap_section_buffer (&data->macro);
18299 munmap_section_buffer (&data->str);
18300 munmap_section_buffer (&data->ranges);
18301 munmap_section_buffer (&data->addr);
18302 munmap_section_buffer (&data->frame);
18303 munmap_section_buffer (&data->eh_frame);
18304 munmap_section_buffer (&data->gdb_index);
18307 VEC_iterate (dwarf2_section_info_def, data->types, ix, section);
18309 munmap_section_buffer (section);
18311 for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix)
18312 VEC_free (dwarf2_per_cu_ptr,
18313 dwarf2_per_objfile->all_comp_units[ix]->s.imported_symtabs);
18315 VEC_free (dwarf2_section_info_def, data->types);
18317 if (data->dwo_files)
18318 free_dwo_files (data->dwo_files, objfile);
18322 /* The "save gdb-index" command. */
18324 /* The contents of the hash table we create when building the string
18326 struct strtab_entry
18328 offset_type offset;
18332 /* Hash function for a strtab_entry.
18334 Function is used only during write_hash_table so no index format backward
18335 compatibility is needed. */
18338 hash_strtab_entry (const void *e)
18340 const struct strtab_entry *entry = e;
18341 return mapped_index_string_hash (INT_MAX, entry->str);
18344 /* Equality function for a strtab_entry. */
18347 eq_strtab_entry (const void *a, const void *b)
18349 const struct strtab_entry *ea = a;
18350 const struct strtab_entry *eb = b;
18351 return !strcmp (ea->str, eb->str);
18354 /* Create a strtab_entry hash table. */
18357 create_strtab (void)
18359 return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry,
18360 xfree, xcalloc, xfree);
18363 /* Add a string to the constant pool. Return the string's offset in
18367 add_string (htab_t table, struct obstack *cpool, const char *str)
18370 struct strtab_entry entry;
18371 struct strtab_entry *result;
18374 slot = htab_find_slot (table, &entry, INSERT);
18379 result = XNEW (struct strtab_entry);
18380 result->offset = obstack_object_size (cpool);
18382 obstack_grow_str0 (cpool, str);
18385 return result->offset;
18388 /* An entry in the symbol table. */
18389 struct symtab_index_entry
18391 /* The name of the symbol. */
18393 /* The offset of the name in the constant pool. */
18394 offset_type index_offset;
18395 /* A sorted vector of the indices of all the CUs that hold an object
18397 VEC (offset_type) *cu_indices;
18400 /* The symbol table. This is a power-of-2-sized hash table. */
18401 struct mapped_symtab
18403 offset_type n_elements;
18405 struct symtab_index_entry **data;
18408 /* Hash function for a symtab_index_entry. */
18411 hash_symtab_entry (const void *e)
18413 const struct symtab_index_entry *entry = e;
18414 return iterative_hash (VEC_address (offset_type, entry->cu_indices),
18415 sizeof (offset_type) * VEC_length (offset_type,
18416 entry->cu_indices),
18420 /* Equality function for a symtab_index_entry. */
18423 eq_symtab_entry (const void *a, const void *b)
18425 const struct symtab_index_entry *ea = a;
18426 const struct symtab_index_entry *eb = b;
18427 int len = VEC_length (offset_type, ea->cu_indices);
18428 if (len != VEC_length (offset_type, eb->cu_indices))
18430 return !memcmp (VEC_address (offset_type, ea->cu_indices),
18431 VEC_address (offset_type, eb->cu_indices),
18432 sizeof (offset_type) * len);
18435 /* Destroy a symtab_index_entry. */
18438 delete_symtab_entry (void *p)
18440 struct symtab_index_entry *entry = p;
18441 VEC_free (offset_type, entry->cu_indices);
18445 /* Create a hash table holding symtab_index_entry objects. */
18448 create_symbol_hash_table (void)
18450 return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry,
18451 delete_symtab_entry, xcalloc, xfree);
18454 /* Create a new mapped symtab object. */
18456 static struct mapped_symtab *
18457 create_mapped_symtab (void)
18459 struct mapped_symtab *symtab = XNEW (struct mapped_symtab);
18460 symtab->n_elements = 0;
18461 symtab->size = 1024;
18462 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
18466 /* Destroy a mapped_symtab. */
18469 cleanup_mapped_symtab (void *p)
18471 struct mapped_symtab *symtab = p;
18472 /* The contents of the array are freed when the other hash table is
18474 xfree (symtab->data);
18478 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
18481 Function is used only during write_hash_table so no index format backward
18482 compatibility is needed. */
18484 static struct symtab_index_entry **
18485 find_slot (struct mapped_symtab *symtab, const char *name)
18487 offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name);
18489 index = hash & (symtab->size - 1);
18490 step = ((hash * 17) & (symtab->size - 1)) | 1;
18494 if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name))
18495 return &symtab->data[index];
18496 index = (index + step) & (symtab->size - 1);
18500 /* Expand SYMTAB's hash table. */
18503 hash_expand (struct mapped_symtab *symtab)
18505 offset_type old_size = symtab->size;
18507 struct symtab_index_entry **old_entries = symtab->data;
18510 symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size);
18512 for (i = 0; i < old_size; ++i)
18514 if (old_entries[i])
18516 struct symtab_index_entry **slot = find_slot (symtab,
18517 old_entries[i]->name);
18518 *slot = old_entries[i];
18522 xfree (old_entries);
18525 /* Add an entry to SYMTAB. NAME is the name of the symbol.
18526 CU_INDEX is the index of the CU in which the symbol appears.
18527 IS_STATIC is one if the symbol is static, otherwise zero (global). */
18530 add_index_entry (struct mapped_symtab *symtab, const char *name,
18531 int is_static, gdb_index_symbol_kind kind,
18532 offset_type cu_index)
18534 struct symtab_index_entry **slot;
18535 offset_type cu_index_and_attrs;
18537 ++symtab->n_elements;
18538 if (4 * symtab->n_elements / 3 >= symtab->size)
18539 hash_expand (symtab);
18541 slot = find_slot (symtab, name);
18544 *slot = XNEW (struct symtab_index_entry);
18545 (*slot)->name = name;
18546 /* index_offset is set later. */
18547 (*slot)->cu_indices = NULL;
18550 cu_index_and_attrs = 0;
18551 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index);
18552 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static);
18553 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind);
18555 /* We don't want to record an index value twice as we want to avoid the
18557 We process all global symbols and then all static symbols
18558 (which would allow us to avoid the duplication by only having to check
18559 the last entry pushed), but a symbol could have multiple kinds in one CU.
18560 To keep things simple we don't worry about the duplication here and
18561 sort and uniqufy the list after we've processed all symbols. */
18562 VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs);
18565 /* qsort helper routine for uniquify_cu_indices. */
18568 offset_type_compare (const void *ap, const void *bp)
18570 offset_type a = *(offset_type *) ap;
18571 offset_type b = *(offset_type *) bp;
18573 return (a > b) - (b > a);
18576 /* Sort and remove duplicates of all symbols' cu_indices lists. */
18579 uniquify_cu_indices (struct mapped_symtab *symtab)
18583 for (i = 0; i < symtab->size; ++i)
18585 struct symtab_index_entry *entry = symtab->data[i];
18588 && entry->cu_indices != NULL)
18590 unsigned int next_to_insert, next_to_check;
18591 offset_type last_value;
18593 qsort (VEC_address (offset_type, entry->cu_indices),
18594 VEC_length (offset_type, entry->cu_indices),
18595 sizeof (offset_type), offset_type_compare);
18597 last_value = VEC_index (offset_type, entry->cu_indices, 0);
18598 next_to_insert = 1;
18599 for (next_to_check = 1;
18600 next_to_check < VEC_length (offset_type, entry->cu_indices);
18603 if (VEC_index (offset_type, entry->cu_indices, next_to_check)
18606 last_value = VEC_index (offset_type, entry->cu_indices,
18608 VEC_replace (offset_type, entry->cu_indices, next_to_insert,
18613 VEC_truncate (offset_type, entry->cu_indices, next_to_insert);
18618 /* Add a vector of indices to the constant pool. */
18621 add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool,
18622 struct symtab_index_entry *entry)
18626 slot = htab_find_slot (symbol_hash_table, entry, INSERT);
18629 offset_type len = VEC_length (offset_type, entry->cu_indices);
18630 offset_type val = MAYBE_SWAP (len);
18635 entry->index_offset = obstack_object_size (cpool);
18637 obstack_grow (cpool, &val, sizeof (val));
18639 VEC_iterate (offset_type, entry->cu_indices, i, iter);
18642 val = MAYBE_SWAP (iter);
18643 obstack_grow (cpool, &val, sizeof (val));
18648 struct symtab_index_entry *old_entry = *slot;
18649 entry->index_offset = old_entry->index_offset;
18652 return entry->index_offset;
18655 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
18656 constant pool entries going into the obstack CPOOL. */
18659 write_hash_table (struct mapped_symtab *symtab,
18660 struct obstack *output, struct obstack *cpool)
18663 htab_t symbol_hash_table;
18666 symbol_hash_table = create_symbol_hash_table ();
18667 str_table = create_strtab ();
18669 /* We add all the index vectors to the constant pool first, to
18670 ensure alignment is ok. */
18671 for (i = 0; i < symtab->size; ++i)
18673 if (symtab->data[i])
18674 add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]);
18677 /* Now write out the hash table. */
18678 for (i = 0; i < symtab->size; ++i)
18680 offset_type str_off, vec_off;
18682 if (symtab->data[i])
18684 str_off = add_string (str_table, cpool, symtab->data[i]->name);
18685 vec_off = symtab->data[i]->index_offset;
18689 /* While 0 is a valid constant pool index, it is not valid
18690 to have 0 for both offsets. */
18695 str_off = MAYBE_SWAP (str_off);
18696 vec_off = MAYBE_SWAP (vec_off);
18698 obstack_grow (output, &str_off, sizeof (str_off));
18699 obstack_grow (output, &vec_off, sizeof (vec_off));
18702 htab_delete (str_table);
18703 htab_delete (symbol_hash_table);
18706 /* Struct to map psymtab to CU index in the index file. */
18707 struct psymtab_cu_index_map
18709 struct partial_symtab *psymtab;
18710 unsigned int cu_index;
18714 hash_psymtab_cu_index (const void *item)
18716 const struct psymtab_cu_index_map *map = item;
18718 return htab_hash_pointer (map->psymtab);
18722 eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs)
18724 const struct psymtab_cu_index_map *lhs = item_lhs;
18725 const struct psymtab_cu_index_map *rhs = item_rhs;
18727 return lhs->psymtab == rhs->psymtab;
18730 /* Helper struct for building the address table. */
18731 struct addrmap_index_data
18733 struct objfile *objfile;
18734 struct obstack *addr_obstack;
18735 htab_t cu_index_htab;
18737 /* Non-zero if the previous_* fields are valid.
18738 We can't write an entry until we see the next entry (since it is only then
18739 that we know the end of the entry). */
18740 int previous_valid;
18741 /* Index of the CU in the table of all CUs in the index file. */
18742 unsigned int previous_cu_index;
18743 /* Start address of the CU. */
18744 CORE_ADDR previous_cu_start;
18747 /* Write an address entry to OBSTACK. */
18750 add_address_entry (struct objfile *objfile, struct obstack *obstack,
18751 CORE_ADDR start, CORE_ADDR end, unsigned int cu_index)
18753 offset_type cu_index_to_write;
18755 CORE_ADDR baseaddr;
18757 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
18759 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr);
18760 obstack_grow (obstack, addr, 8);
18761 store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr);
18762 obstack_grow (obstack, addr, 8);
18763 cu_index_to_write = MAYBE_SWAP (cu_index);
18764 obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type));
18767 /* Worker function for traversing an addrmap to build the address table. */
18770 add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj)
18772 struct addrmap_index_data *data = datap;
18773 struct partial_symtab *pst = obj;
18775 if (data->previous_valid)
18776 add_address_entry (data->objfile, data->addr_obstack,
18777 data->previous_cu_start, start_addr,
18778 data->previous_cu_index);
18780 data->previous_cu_start = start_addr;
18783 struct psymtab_cu_index_map find_map, *map;
18784 find_map.psymtab = pst;
18785 map = htab_find (data->cu_index_htab, &find_map);
18786 gdb_assert (map != NULL);
18787 data->previous_cu_index = map->cu_index;
18788 data->previous_valid = 1;
18791 data->previous_valid = 0;
18796 /* Write OBJFILE's address map to OBSTACK.
18797 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
18798 in the index file. */
18801 write_address_map (struct objfile *objfile, struct obstack *obstack,
18802 htab_t cu_index_htab)
18804 struct addrmap_index_data addrmap_index_data;
18806 /* When writing the address table, we have to cope with the fact that
18807 the addrmap iterator only provides the start of a region; we have to
18808 wait until the next invocation to get the start of the next region. */
18810 addrmap_index_data.objfile = objfile;
18811 addrmap_index_data.addr_obstack = obstack;
18812 addrmap_index_data.cu_index_htab = cu_index_htab;
18813 addrmap_index_data.previous_valid = 0;
18815 addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker,
18816 &addrmap_index_data);
18818 /* It's highly unlikely the last entry (end address = 0xff...ff)
18819 is valid, but we should still handle it.
18820 The end address is recorded as the start of the next region, but that
18821 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
18823 if (addrmap_index_data.previous_valid)
18824 add_address_entry (objfile, obstack,
18825 addrmap_index_data.previous_cu_start, (CORE_ADDR) -1,
18826 addrmap_index_data.previous_cu_index);
18829 /* Return the symbol kind of PSYM. */
18831 static gdb_index_symbol_kind
18832 symbol_kind (struct partial_symbol *psym)
18834 domain_enum domain = PSYMBOL_DOMAIN (psym);
18835 enum address_class aclass = PSYMBOL_CLASS (psym);
18843 return GDB_INDEX_SYMBOL_KIND_FUNCTION;
18845 return GDB_INDEX_SYMBOL_KIND_TYPE;
18847 case LOC_CONST_BYTES:
18848 case LOC_OPTIMIZED_OUT:
18850 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
18852 /* Note: It's currently impossible to recognize psyms as enum values
18853 short of reading the type info. For now punt. */
18854 return GDB_INDEX_SYMBOL_KIND_VARIABLE;
18856 /* There are other LOC_FOO values that one might want to classify
18857 as variables, but dwarf2read.c doesn't currently use them. */
18858 return GDB_INDEX_SYMBOL_KIND_OTHER;
18860 case STRUCT_DOMAIN:
18861 return GDB_INDEX_SYMBOL_KIND_TYPE;
18863 return GDB_INDEX_SYMBOL_KIND_OTHER;
18867 /* Add a list of partial symbols to SYMTAB. */
18870 write_psymbols (struct mapped_symtab *symtab,
18872 struct partial_symbol **psymp,
18874 offset_type cu_index,
18877 for (; count-- > 0; ++psymp)
18879 struct partial_symbol *psym = *psymp;
18882 if (SYMBOL_LANGUAGE (psym) == language_ada)
18883 error (_("Ada is not currently supported by the index"));
18885 /* Only add a given psymbol once. */
18886 slot = htab_find_slot (psyms_seen, psym, INSERT);
18889 gdb_index_symbol_kind kind = symbol_kind (psym);
18892 add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym),
18893 is_static, kind, cu_index);
18898 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
18899 exception if there is an error. */
18902 write_obstack (FILE *file, struct obstack *obstack)
18904 if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack),
18906 != obstack_object_size (obstack))
18907 error (_("couldn't data write to file"));
18910 /* Unlink a file if the argument is not NULL. */
18913 unlink_if_set (void *p)
18915 char **filename = p;
18917 unlink (*filename);
18920 /* A helper struct used when iterating over debug_types. */
18921 struct signatured_type_index_data
18923 struct objfile *objfile;
18924 struct mapped_symtab *symtab;
18925 struct obstack *types_list;
18930 /* A helper function that writes a single signatured_type to an
18934 write_one_signatured_type (void **slot, void *d)
18936 struct signatured_type_index_data *info = d;
18937 struct signatured_type *entry = (struct signatured_type *) *slot;
18938 struct dwarf2_per_cu_data *per_cu = &entry->per_cu;
18939 struct partial_symtab *psymtab = per_cu->v.psymtab;
18942 write_psymbols (info->symtab,
18944 info->objfile->global_psymbols.list
18945 + psymtab->globals_offset,
18946 psymtab->n_global_syms, info->cu_index,
18948 write_psymbols (info->symtab,
18950 info->objfile->static_psymbols.list
18951 + psymtab->statics_offset,
18952 psymtab->n_static_syms, info->cu_index,
18955 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
18956 entry->per_cu.offset.sect_off);
18957 obstack_grow (info->types_list, val, 8);
18958 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
18959 entry->type_offset_in_tu.cu_off);
18960 obstack_grow (info->types_list, val, 8);
18961 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature);
18962 obstack_grow (info->types_list, val, 8);
18969 /* Recurse into all "included" dependencies and write their symbols as
18970 if they appeared in this psymtab. */
18973 recursively_write_psymbols (struct objfile *objfile,
18974 struct partial_symtab *psymtab,
18975 struct mapped_symtab *symtab,
18977 offset_type cu_index)
18981 for (i = 0; i < psymtab->number_of_dependencies; ++i)
18982 if (psymtab->dependencies[i]->user != NULL)
18983 recursively_write_psymbols (objfile, psymtab->dependencies[i],
18984 symtab, psyms_seen, cu_index);
18986 write_psymbols (symtab,
18988 objfile->global_psymbols.list + psymtab->globals_offset,
18989 psymtab->n_global_syms, cu_index,
18991 write_psymbols (symtab,
18993 objfile->static_psymbols.list + psymtab->statics_offset,
18994 psymtab->n_static_syms, cu_index,
18998 /* Create an index file for OBJFILE in the directory DIR. */
19001 write_psymtabs_to_index (struct objfile *objfile, const char *dir)
19003 struct cleanup *cleanup;
19004 char *filename, *cleanup_filename;
19005 struct obstack contents, addr_obstack, constant_pool, symtab_obstack;
19006 struct obstack cu_list, types_cu_list;
19009 struct mapped_symtab *symtab;
19010 offset_type val, size_of_contents, total_len;
19013 htab_t cu_index_htab;
19014 struct psymtab_cu_index_map *psymtab_cu_index_map;
19016 if (!objfile->psymtabs || !objfile->psymtabs_addrmap)
19019 if (dwarf2_per_objfile->using_index)
19020 error (_("Cannot use an index to create the index"));
19022 if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1)
19023 error (_("Cannot make an index when the file has multiple .debug_types sections"));
19025 if (stat (objfile->name, &st) < 0)
19026 perror_with_name (objfile->name);
19028 filename = concat (dir, SLASH_STRING, lbasename (objfile->name),
19029 INDEX_SUFFIX, (char *) NULL);
19030 cleanup = make_cleanup (xfree, filename);
19032 out_file = fopen (filename, "wb");
19034 error (_("Can't open `%s' for writing"), filename);
19036 cleanup_filename = filename;
19037 make_cleanup (unlink_if_set, &cleanup_filename);
19039 symtab = create_mapped_symtab ();
19040 make_cleanup (cleanup_mapped_symtab, symtab);
19042 obstack_init (&addr_obstack);
19043 make_cleanup_obstack_free (&addr_obstack);
19045 obstack_init (&cu_list);
19046 make_cleanup_obstack_free (&cu_list);
19048 obstack_init (&types_cu_list);
19049 make_cleanup_obstack_free (&types_cu_list);
19051 psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer,
19052 NULL, xcalloc, xfree);
19053 make_cleanup_htab_delete (psyms_seen);
19055 /* While we're scanning CU's create a table that maps a psymtab pointer
19056 (which is what addrmap records) to its index (which is what is recorded
19057 in the index file). This will later be needed to write the address
19059 cu_index_htab = htab_create_alloc (100,
19060 hash_psymtab_cu_index,
19061 eq_psymtab_cu_index,
19062 NULL, xcalloc, xfree);
19063 make_cleanup_htab_delete (cu_index_htab);
19064 psymtab_cu_index_map = (struct psymtab_cu_index_map *)
19065 xmalloc (sizeof (struct psymtab_cu_index_map)
19066 * dwarf2_per_objfile->n_comp_units);
19067 make_cleanup (xfree, psymtab_cu_index_map);
19069 /* The CU list is already sorted, so we don't need to do additional
19070 work here. Also, the debug_types entries do not appear in
19071 all_comp_units, but only in their own hash table. */
19072 for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i)
19074 struct dwarf2_per_cu_data *per_cu
19075 = dwarf2_per_objfile->all_comp_units[i];
19076 struct partial_symtab *psymtab = per_cu->v.psymtab;
19078 struct psymtab_cu_index_map *map;
19081 if (psymtab->user == NULL)
19082 recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i);
19084 map = &psymtab_cu_index_map[i];
19085 map->psymtab = psymtab;
19087 slot = htab_find_slot (cu_index_htab, map, INSERT);
19088 gdb_assert (slot != NULL);
19089 gdb_assert (*slot == NULL);
19092 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE,
19093 per_cu->offset.sect_off);
19094 obstack_grow (&cu_list, val, 8);
19095 store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length);
19096 obstack_grow (&cu_list, val, 8);
19099 /* Dump the address map. */
19100 write_address_map (objfile, &addr_obstack, cu_index_htab);
19102 /* Write out the .debug_type entries, if any. */
19103 if (dwarf2_per_objfile->signatured_types)
19105 struct signatured_type_index_data sig_data;
19107 sig_data.objfile = objfile;
19108 sig_data.symtab = symtab;
19109 sig_data.types_list = &types_cu_list;
19110 sig_data.psyms_seen = psyms_seen;
19111 sig_data.cu_index = dwarf2_per_objfile->n_comp_units;
19112 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
19113 write_one_signatured_type, &sig_data);
19116 /* Now that we've processed all symbols we can shrink their cu_indices
19118 uniquify_cu_indices (symtab);
19120 obstack_init (&constant_pool);
19121 make_cleanup_obstack_free (&constant_pool);
19122 obstack_init (&symtab_obstack);
19123 make_cleanup_obstack_free (&symtab_obstack);
19124 write_hash_table (symtab, &symtab_obstack, &constant_pool);
19126 obstack_init (&contents);
19127 make_cleanup_obstack_free (&contents);
19128 size_of_contents = 6 * sizeof (offset_type);
19129 total_len = size_of_contents;
19131 /* The version number. */
19132 val = MAYBE_SWAP (7);
19133 obstack_grow (&contents, &val, sizeof (val));
19135 /* The offset of the CU list from the start of the file. */
19136 val = MAYBE_SWAP (total_len);
19137 obstack_grow (&contents, &val, sizeof (val));
19138 total_len += obstack_object_size (&cu_list);
19140 /* The offset of the types CU list from the start of the file. */
19141 val = MAYBE_SWAP (total_len);
19142 obstack_grow (&contents, &val, sizeof (val));
19143 total_len += obstack_object_size (&types_cu_list);
19145 /* The offset of the address table from the start of the file. */
19146 val = MAYBE_SWAP (total_len);
19147 obstack_grow (&contents, &val, sizeof (val));
19148 total_len += obstack_object_size (&addr_obstack);
19150 /* The offset of the symbol table from the start of the file. */
19151 val = MAYBE_SWAP (total_len);
19152 obstack_grow (&contents, &val, sizeof (val));
19153 total_len += obstack_object_size (&symtab_obstack);
19155 /* The offset of the constant pool from the start of the file. */
19156 val = MAYBE_SWAP (total_len);
19157 obstack_grow (&contents, &val, sizeof (val));
19158 total_len += obstack_object_size (&constant_pool);
19160 gdb_assert (obstack_object_size (&contents) == size_of_contents);
19162 write_obstack (out_file, &contents);
19163 write_obstack (out_file, &cu_list);
19164 write_obstack (out_file, &types_cu_list);
19165 write_obstack (out_file, &addr_obstack);
19166 write_obstack (out_file, &symtab_obstack);
19167 write_obstack (out_file, &constant_pool);
19171 /* We want to keep the file, so we set cleanup_filename to NULL
19172 here. See unlink_if_set. */
19173 cleanup_filename = NULL;
19175 do_cleanups (cleanup);
19178 /* Implementation of the `save gdb-index' command.
19180 Note that the file format used by this command is documented in the
19181 GDB manual. Any changes here must be documented there. */
19184 save_gdb_index_command (char *arg, int from_tty)
19186 struct objfile *objfile;
19189 error (_("usage: save gdb-index DIRECTORY"));
19191 ALL_OBJFILES (objfile)
19195 /* If the objfile does not correspond to an actual file, skip it. */
19196 if (stat (objfile->name, &st) < 0)
19199 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
19200 if (dwarf2_per_objfile)
19202 volatile struct gdb_exception except;
19204 TRY_CATCH (except, RETURN_MASK_ERROR)
19206 write_psymtabs_to_index (objfile, arg);
19208 if (except.reason < 0)
19209 exception_fprintf (gdb_stderr, except,
19210 _("Error while writing index for `%s': "),
19218 int dwarf2_always_disassemble;
19221 show_dwarf2_always_disassemble (struct ui_file *file, int from_tty,
19222 struct cmd_list_element *c, const char *value)
19224 fprintf_filtered (file,
19225 _("Whether to always disassemble "
19226 "DWARF expressions is %s.\n"),
19231 show_check_physname (struct ui_file *file, int from_tty,
19232 struct cmd_list_element *c, const char *value)
19234 fprintf_filtered (file,
19235 _("Whether to check \"physname\" is %s.\n"),
19239 void _initialize_dwarf2_read (void);
19242 _initialize_dwarf2_read (void)
19244 struct cmd_list_element *c;
19246 dwarf2_objfile_data_key
19247 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
19249 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
19250 Set DWARF 2 specific variables.\n\
19251 Configure DWARF 2 variables such as the cache size"),
19252 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
19253 0/*allow-unknown*/, &maintenance_set_cmdlist);
19255 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
19256 Show DWARF 2 specific variables\n\
19257 Show DWARF 2 variables such as the cache size"),
19258 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
19259 0/*allow-unknown*/, &maintenance_show_cmdlist);
19261 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
19262 &dwarf2_max_cache_age, _("\
19263 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
19264 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
19265 A higher limit means that cached compilation units will be stored\n\
19266 in memory longer, and more total memory will be used. Zero disables\n\
19267 caching, which can slow down startup."),
19269 show_dwarf2_max_cache_age,
19270 &set_dwarf2_cmdlist,
19271 &show_dwarf2_cmdlist);
19273 add_setshow_boolean_cmd ("always-disassemble", class_obscure,
19274 &dwarf2_always_disassemble, _("\
19275 Set whether `info address' always disassembles DWARF expressions."), _("\
19276 Show whether `info address' always disassembles DWARF expressions."), _("\
19277 When enabled, DWARF expressions are always printed in an assembly-like\n\
19278 syntax. When disabled, expressions will be printed in a more\n\
19279 conversational style, when possible."),
19281 show_dwarf2_always_disassemble,
19282 &set_dwarf2_cmdlist,
19283 &show_dwarf2_cmdlist);
19285 add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\
19286 Set debugging of the dwarf2 reader."), _("\
19287 Show debugging of the dwarf2 reader."), _("\
19288 When enabled, debugging messages are printed during dwarf2 reading\n\
19289 and symtab expansion."),
19292 &setdebuglist, &showdebuglist);
19294 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
19295 Set debugging of the dwarf2 DIE reader."), _("\
19296 Show debugging of the dwarf2 DIE reader."), _("\
19297 When enabled (non-zero), DIEs are dumped after they are read in.\n\
19298 The value is the maximum depth to print."),
19301 &setdebuglist, &showdebuglist);
19303 add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\
19304 Set cross-checking of \"physname\" code against demangler."), _("\
19305 Show cross-checking of \"physname\" code against demangler."), _("\
19306 When enabled, GDB's internal \"physname\" code is checked against\n\
19308 NULL, show_check_physname,
19309 &setdebuglist, &showdebuglist);
19311 c = add_cmd ("gdb-index", class_files, save_gdb_index_command,
19313 Save a gdb-index file.\n\
19314 Usage: save gdb-index DIRECTORY"),
19316 set_cmd_completer (c, filename_completer);