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"
70 #include "gdb_string.h"
71 #include "gdb_assert.h"
72 #include <sys/types.h>
74 typedef struct symbol
*symbolp
;
77 /* When non-zero, print basic high level tracing messages.
78 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
79 static int dwarf2_read_debug
= 0;
81 /* When non-zero, dump DIEs after they are read in. */
82 static int dwarf2_die_debug
= 0;
84 /* When non-zero, cross-check physname against demangler. */
85 static int check_physname
= 0;
87 /* When non-zero, do not reject deprecated .gdb_index sections. */
88 int use_deprecated_index_sections
= 0;
90 /* When set, the file that we're processing is known to have debugging
91 info for C++ namespaces. GCC 3.3.x did not produce this information,
92 but later versions do. */
94 static int processing_has_namespace_info
;
96 static const struct objfile_data
*dwarf2_objfile_data_key
;
98 struct dwarf2_section_info
103 /* True if we have tried to read this section. */
107 typedef struct dwarf2_section_info dwarf2_section_info_def
;
108 DEF_VEC_O (dwarf2_section_info_def
);
110 /* All offsets in the index are of this type. It must be
111 architecture-independent. */
112 typedef uint32_t offset_type
;
114 DEF_VEC_I (offset_type
);
116 /* Ensure only legit values are used. */
117 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
119 gdb_assert ((unsigned int) (value) <= 1); \
120 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
123 /* Ensure only legit values are used. */
124 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
126 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
127 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
128 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
131 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
132 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
134 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
135 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
138 /* A description of the mapped index. The file format is described in
139 a comment by the code that writes the index. */
142 /* Index data format version. */
145 /* The total length of the buffer. */
148 /* A pointer to the address table data. */
149 const gdb_byte
*address_table
;
151 /* Size of the address table data in bytes. */
152 offset_type address_table_size
;
154 /* The symbol table, implemented as a hash table. */
155 const offset_type
*symbol_table
;
157 /* Size in slots, each slot is 2 offset_types. */
158 offset_type symbol_table_slots
;
160 /* A pointer to the constant pool. */
161 const char *constant_pool
;
164 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
165 DEF_VEC_P (dwarf2_per_cu_ptr
);
167 /* Collection of data recorded per objfile.
168 This hangs off of dwarf2_objfile_data_key. */
170 struct dwarf2_per_objfile
172 struct dwarf2_section_info info
;
173 struct dwarf2_section_info abbrev
;
174 struct dwarf2_section_info line
;
175 struct dwarf2_section_info loc
;
176 struct dwarf2_section_info macinfo
;
177 struct dwarf2_section_info macro
;
178 struct dwarf2_section_info str
;
179 struct dwarf2_section_info ranges
;
180 struct dwarf2_section_info addr
;
181 struct dwarf2_section_info frame
;
182 struct dwarf2_section_info eh_frame
;
183 struct dwarf2_section_info gdb_index
;
185 VEC (dwarf2_section_info_def
) *types
;
188 struct objfile
*objfile
;
190 /* Table of all the compilation units. This is used to locate
191 the target compilation unit of a particular reference. */
192 struct dwarf2_per_cu_data
**all_comp_units
;
194 /* The number of compilation units in ALL_COMP_UNITS. */
197 /* The number of .debug_types-related CUs. */
200 /* The .debug_types-related CUs (TUs). */
201 struct signatured_type
**all_type_units
;
203 /* The number of entries in all_type_unit_groups. */
204 int n_type_unit_groups
;
206 /* Table of type unit groups.
207 This exists to make it easy to iterate over all CUs and TU groups. */
208 struct type_unit_group
**all_type_unit_groups
;
210 /* Table of struct type_unit_group objects.
211 The hash key is the DW_AT_stmt_list value. */
212 htab_t type_unit_groups
;
214 /* A table mapping .debug_types signatures to its signatured_type entry.
215 This is NULL if the .debug_types section hasn't been read in yet. */
216 htab_t signatured_types
;
218 /* Type unit statistics, to see how well the scaling improvements
222 int nr_uniq_abbrev_tables
;
224 int nr_symtab_sharers
;
225 int nr_stmt_less_type_units
;
228 /* A chain of compilation units that are currently read in, so that
229 they can be freed later. */
230 struct dwarf2_per_cu_data
*read_in_chain
;
232 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
233 This is NULL if the table hasn't been allocated yet. */
236 /* The shared '.dwz' file, if one exists. This is used when the
237 original data was compressed using 'dwz -m'. */
238 struct dwz_file
*dwz_file
;
240 /* A flag indicating wether this objfile has a section loaded at a
242 int has_section_at_zero
;
244 /* True if we are using the mapped index,
245 or we are faking it for OBJF_READNOW's sake. */
246 unsigned char using_index
;
248 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
249 struct mapped_index
*index_table
;
251 /* When using index_table, this keeps track of all quick_file_names entries.
252 TUs can share line table entries with CUs or other TUs, and there can be
253 a lot more TUs than unique line tables, so we maintain a separate table
254 of all line table entries to support the sharing. */
255 htab_t quick_file_names_table
;
257 /* Set during partial symbol reading, to prevent queueing of full
259 int reading_partial_symbols
;
261 /* Table mapping type DIEs to their struct type *.
262 This is NULL if not allocated yet.
263 The mapping is done via (CU/TU signature + DIE offset) -> type. */
264 htab_t die_type_hash
;
266 /* The CUs we recently read. */
267 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
270 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
272 /* Default names of the debugging sections. */
274 /* Note that if the debugging section has been compressed, it might
275 have a name like .zdebug_info. */
277 static const struct dwarf2_debug_sections dwarf2_elf_names
=
279 { ".debug_info", ".zdebug_info" },
280 { ".debug_abbrev", ".zdebug_abbrev" },
281 { ".debug_line", ".zdebug_line" },
282 { ".debug_loc", ".zdebug_loc" },
283 { ".debug_macinfo", ".zdebug_macinfo" },
284 { ".debug_macro", ".zdebug_macro" },
285 { ".debug_str", ".zdebug_str" },
286 { ".debug_ranges", ".zdebug_ranges" },
287 { ".debug_types", ".zdebug_types" },
288 { ".debug_addr", ".zdebug_addr" },
289 { ".debug_frame", ".zdebug_frame" },
290 { ".eh_frame", NULL
},
291 { ".gdb_index", ".zgdb_index" },
295 /* List of DWO sections. */
297 static const struct dwo_section_names
299 struct dwarf2_section_names abbrev_dwo
;
300 struct dwarf2_section_names info_dwo
;
301 struct dwarf2_section_names line_dwo
;
302 struct dwarf2_section_names loc_dwo
;
303 struct dwarf2_section_names macinfo_dwo
;
304 struct dwarf2_section_names macro_dwo
;
305 struct dwarf2_section_names str_dwo
;
306 struct dwarf2_section_names str_offsets_dwo
;
307 struct dwarf2_section_names types_dwo
;
311 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
312 { ".debug_info.dwo", ".zdebug_info.dwo" },
313 { ".debug_line.dwo", ".zdebug_line.dwo" },
314 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
315 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
316 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
317 { ".debug_str.dwo", ".zdebug_str.dwo" },
318 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
319 { ".debug_types.dwo", ".zdebug_types.dwo" },
322 /* local data types */
324 /* The data in a compilation unit header, after target2host
325 translation, looks like this. */
326 struct comp_unit_head
330 unsigned char addr_size
;
331 unsigned char signed_addr_p
;
332 sect_offset abbrev_offset
;
334 /* Size of file offsets; either 4 or 8. */
335 unsigned int offset_size
;
337 /* Size of the length field; either 4 or 12. */
338 unsigned int initial_length_size
;
340 /* Offset to the first byte of this compilation unit header in the
341 .debug_info section, for resolving relative reference dies. */
344 /* Offset to first die in this cu from the start of the cu.
345 This will be the first byte following the compilation unit header. */
346 cu_offset first_die_offset
;
349 /* Type used for delaying computation of method physnames.
350 See comments for compute_delayed_physnames. */
351 struct delayed_method_info
353 /* The type to which the method is attached, i.e., its parent class. */
356 /* The index of the method in the type's function fieldlists. */
359 /* The index of the method in the fieldlist. */
362 /* The name of the DIE. */
365 /* The DIE associated with this method. */
366 struct die_info
*die
;
369 typedef struct delayed_method_info delayed_method_info
;
370 DEF_VEC_O (delayed_method_info
);
372 /* Internal state when decoding a particular compilation unit. */
375 /* The objfile containing this compilation unit. */
376 struct objfile
*objfile
;
378 /* The header of the compilation unit. */
379 struct comp_unit_head header
;
381 /* Base address of this compilation unit. */
382 CORE_ADDR base_address
;
384 /* Non-zero if base_address has been set. */
387 /* The language we are debugging. */
388 enum language language
;
389 const struct language_defn
*language_defn
;
391 const char *producer
;
393 /* The generic symbol table building routines have separate lists for
394 file scope symbols and all all other scopes (local scopes). So
395 we need to select the right one to pass to add_symbol_to_list().
396 We do it by keeping a pointer to the correct list in list_in_scope.
398 FIXME: The original dwarf code just treated the file scope as the
399 first local scope, and all other local scopes as nested local
400 scopes, and worked fine. Check to see if we really need to
401 distinguish these in buildsym.c. */
402 struct pending
**list_in_scope
;
404 /* The abbrev table for this CU.
405 Normally this points to the abbrev table in the objfile.
406 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
407 struct abbrev_table
*abbrev_table
;
409 /* Hash table holding all the loaded partial DIEs
410 with partial_die->offset.SECT_OFF as hash. */
413 /* Storage for things with the same lifetime as this read-in compilation
414 unit, including partial DIEs. */
415 struct obstack comp_unit_obstack
;
417 /* When multiple dwarf2_cu structures are living in memory, this field
418 chains them all together, so that they can be released efficiently.
419 We will probably also want a generation counter so that most-recently-used
420 compilation units are cached... */
421 struct dwarf2_per_cu_data
*read_in_chain
;
423 /* Backchain to our per_cu entry if the tree has been built. */
424 struct dwarf2_per_cu_data
*per_cu
;
426 /* How many compilation units ago was this CU last referenced? */
429 /* A hash table of DIE cu_offset for following references with
430 die_info->offset.sect_off as hash. */
433 /* Full DIEs if read in. */
434 struct die_info
*dies
;
436 /* A set of pointers to dwarf2_per_cu_data objects for compilation
437 units referenced by this one. Only set during full symbol processing;
438 partial symbol tables do not have dependencies. */
441 /* Header data from the line table, during full symbol processing. */
442 struct line_header
*line_header
;
444 /* A list of methods which need to have physnames computed
445 after all type information has been read. */
446 VEC (delayed_method_info
) *method_list
;
448 /* To be copied to symtab->call_site_htab. */
449 htab_t call_site_htab
;
451 /* Non-NULL if this CU came from a DWO file.
452 There is an invariant here that is important to remember:
453 Except for attributes copied from the top level DIE in the "main"
454 (or "stub") file in preparation for reading the DWO file
455 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
456 Either there isn't a DWO file (in which case this is NULL and the point
457 is moot), or there is and either we're not going to read it (in which
458 case this is NULL) or there is and we are reading it (in which case this
460 struct dwo_unit
*dwo_unit
;
462 /* The DW_AT_addr_base attribute if present, zero otherwise
463 (zero is a valid value though).
464 Note this value comes from the stub CU/TU's DIE. */
467 /* The DW_AT_ranges_base attribute if present, zero otherwise
468 (zero is a valid value though).
469 Note this value comes from the stub CU/TU's DIE.
470 Also note that the value is zero in the non-DWO case so this value can
471 be used without needing to know whether DWO files are in use or not. */
472 ULONGEST ranges_base
;
474 /* Mark used when releasing cached dies. */
475 unsigned int mark
: 1;
477 /* This CU references .debug_loc. See the symtab->locations_valid field.
478 This test is imperfect as there may exist optimized debug code not using
479 any location list and still facing inlining issues if handled as
480 unoptimized code. For a future better test see GCC PR other/32998. */
481 unsigned int has_loclist
: 1;
483 /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
484 CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
485 are valid. This information is cached because profiling CU expansion
486 showed excessive time spent in producer_is_gxx_lt_4_6. */
487 unsigned int checked_producer
: 1;
488 unsigned int producer_is_gxx_lt_4_6
: 1;
489 unsigned int producer_is_icc
: 1;
492 /* Persistent data held for a compilation unit, even when not
493 processing it. We put a pointer to this structure in the
494 read_symtab_private field of the psymtab. */
496 struct dwarf2_per_cu_data
498 /* The start offset and length of this compilation unit.
499 NOTE: Unlike comp_unit_head.length, this length includes
501 If the DIE refers to a DWO file, this is always of the original die,
506 /* Flag indicating this compilation unit will be read in before
507 any of the current compilation units are processed. */
508 unsigned int queued
: 1;
510 /* This flag will be set when reading partial DIEs if we need to load
511 absolutely all DIEs for this compilation unit, instead of just the ones
512 we think are interesting. It gets set if we look for a DIE in the
513 hash table and don't find it. */
514 unsigned int load_all_dies
: 1;
516 /* Non-zero if this CU is from .debug_types. */
517 unsigned int is_debug_types
: 1;
519 /* Non-zero if this CU is from the .dwz file. */
520 unsigned int is_dwz
: 1;
522 /* The section this CU/TU lives in.
523 If the DIE refers to a DWO file, this is always the original die,
525 struct dwarf2_section_info
*info_or_types_section
;
527 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
528 of the CU cache it gets reset to NULL again. */
529 struct dwarf2_cu
*cu
;
531 /* The corresponding objfile.
532 Normally we can get the objfile from dwarf2_per_objfile.
533 However we can enter this file with just a "per_cu" handle. */
534 struct objfile
*objfile
;
536 /* When using partial symbol tables, the 'psymtab' field is active.
537 Otherwise the 'quick' field is active. */
540 /* The partial symbol table associated with this compilation unit,
541 or NULL for unread partial units. */
542 struct partial_symtab
*psymtab
;
544 /* Data needed by the "quick" functions. */
545 struct dwarf2_per_cu_quick_data
*quick
;
550 /* The CUs we import using DW_TAG_imported_unit. This is filled in
551 while reading psymtabs, used to compute the psymtab dependencies,
552 and then cleared. Then it is filled in again while reading full
553 symbols, and only deleted when the objfile is destroyed. */
554 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
556 /* Type units are grouped by their DW_AT_stmt_list entry so that they
557 can share them. If this is a TU, this points to the containing
559 struct type_unit_group
*type_unit_group
;
563 /* Entry in the signatured_types hash table. */
565 struct signatured_type
567 /* The "per_cu" object of this type.
568 N.B.: This is the first member so that it's easy to convert pointers
570 struct dwarf2_per_cu_data per_cu
;
572 /* The type's signature. */
575 /* Offset in the TU of the type's DIE, as read from the TU header.
576 If the definition lives in a DWO file, this value is unusable. */
577 cu_offset type_offset_in_tu
;
579 /* Offset in the section of the type's DIE.
580 If the definition lives in a DWO file, this is the offset in the
581 .debug_types.dwo section.
582 The value is zero until the actual value is known.
583 Zero is otherwise not a valid section offset. */
584 sect_offset type_offset_in_section
;
587 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
588 This includes type_unit_group and quick_file_names. */
590 struct stmt_list_hash
592 /* The DWO unit this table is from or NULL if there is none. */
593 struct dwo_unit
*dwo_unit
;
595 /* Offset in .debug_line or .debug_line.dwo. */
596 sect_offset line_offset
;
599 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
600 an object of this type. */
602 struct type_unit_group
604 /* dwarf2read.c's main "handle" on the symtab.
605 To simplify things we create an artificial CU that "includes" all the
606 type units using this stmt_list so that the rest of the code still has
607 a "per_cu" handle on the symtab.
608 This PER_CU is recognized by having no section. */
609 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
610 struct dwarf2_per_cu_data per_cu
;
614 /* The TUs that share this DW_AT_stmt_list entry.
615 This is added to while parsing type units to build partial symtabs,
616 and is deleted afterwards and not used again. */
617 VEC (dwarf2_per_cu_ptr
) *tus
;
619 /* When reading the line table in "quick" functions, we need a real TU.
620 Any will do, we know they all share the same DW_AT_stmt_list entry.
621 For simplicity's sake, we pick the first one. */
622 struct dwarf2_per_cu_data
*first_tu
;
625 /* The primary symtab.
626 Type units in a group needn't all be defined in the same source file,
627 so we create an essentially anonymous symtab as the primary symtab. */
628 struct symtab
*primary_symtab
;
630 /* The data used to construct the hash key. */
631 struct stmt_list_hash hash
;
633 /* The number of symtabs from the line header.
634 The value here must match line_header.num_file_names. */
635 unsigned int num_symtabs
;
637 /* The symbol tables for this TU (obtained from the files listed in
639 WARNING: The order of entries here must match the order of entries
640 in the line header. After the first TU using this type_unit_group, the
641 line header for the subsequent TUs is recreated from this. This is done
642 because we need to use the same symtabs for each TU using the same
643 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
644 there's no guarantee the line header doesn't have duplicate entries. */
645 struct symtab
**symtabs
;
648 /* These sections are what may appear in a "dwo" file. */
652 struct dwarf2_section_info abbrev
;
653 struct dwarf2_section_info info
;
654 struct dwarf2_section_info line
;
655 struct dwarf2_section_info loc
;
656 struct dwarf2_section_info macinfo
;
657 struct dwarf2_section_info macro
;
658 struct dwarf2_section_info str
;
659 struct dwarf2_section_info str_offsets
;
660 VEC (dwarf2_section_info_def
) *types
;
663 /* Common bits of DWO CUs/TUs. */
667 /* Backlink to the containing struct dwo_file. */
668 struct dwo_file
*dwo_file
;
670 /* The "id" that distinguishes this CU/TU.
671 .debug_info calls this "dwo_id", .debug_types calls this "signature".
672 Since signatures came first, we stick with it for consistency. */
675 /* The section this CU/TU lives in, in the DWO file. */
676 struct dwarf2_section_info
*info_or_types_section
;
678 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
682 /* For types, offset in the type's DIE of the type defined by this TU. */
683 cu_offset type_offset_in_tu
;
686 /* Data for one DWO file. */
690 /* The DW_AT_GNU_dwo_name attribute.
691 We don't manage space for this, it's an attribute. */
692 const char *dwo_name
;
694 /* The bfd, when the file is open. Otherwise this is NULL. */
697 /* Section info for this file. */
698 struct dwo_sections sections
;
700 /* Table of CUs in the file.
701 Each element is a struct dwo_unit. */
704 /* Table of TUs in the file.
705 Each element is a struct dwo_unit. */
709 /* This represents a '.dwz' file. */
713 /* A dwz file can only contain a few sections. */
714 struct dwarf2_section_info abbrev
;
715 struct dwarf2_section_info info
;
716 struct dwarf2_section_info str
;
717 struct dwarf2_section_info line
;
718 struct dwarf2_section_info macro
;
719 struct dwarf2_section_info gdb_index
;
725 /* Struct used to pass misc. parameters to read_die_and_children, et
726 al. which are used for both .debug_info and .debug_types dies.
727 All parameters here are unchanging for the life of the call. This
728 struct exists to abstract away the constant parameters of die reading. */
730 struct die_reader_specs
732 /* die_section->asection->owner. */
735 /* The CU of the DIE we are parsing. */
736 struct dwarf2_cu
*cu
;
738 /* Non-NULL if reading a DWO file. */
739 struct dwo_file
*dwo_file
;
741 /* The section the die comes from.
742 This is either .debug_info or .debug_types, or the .dwo variants. */
743 struct dwarf2_section_info
*die_section
;
745 /* die_section->buffer. */
748 /* The end of the buffer. */
749 const gdb_byte
*buffer_end
;
752 /* Type of function passed to init_cutu_and_read_dies, et.al. */
753 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
755 struct die_info
*comp_unit_die
,
759 /* The line number information for a compilation unit (found in the
760 .debug_line section) begins with a "statement program header",
761 which contains the following information. */
764 unsigned int total_length
;
765 unsigned short version
;
766 unsigned int header_length
;
767 unsigned char minimum_instruction_length
;
768 unsigned char maximum_ops_per_instruction
;
769 unsigned char default_is_stmt
;
771 unsigned char line_range
;
772 unsigned char opcode_base
;
774 /* standard_opcode_lengths[i] is the number of operands for the
775 standard opcode whose value is i. This means that
776 standard_opcode_lengths[0] is unused, and the last meaningful
777 element is standard_opcode_lengths[opcode_base - 1]. */
778 unsigned char *standard_opcode_lengths
;
780 /* The include_directories table. NOTE! These strings are not
781 allocated with xmalloc; instead, they are pointers into
782 debug_line_buffer. If you try to free them, `free' will get
784 unsigned int num_include_dirs
, include_dirs_size
;
787 /* The file_names table. NOTE! These strings are not allocated
788 with xmalloc; instead, they are pointers into debug_line_buffer.
789 Don't try to free them directly. */
790 unsigned int num_file_names
, file_names_size
;
794 unsigned int dir_index
;
795 unsigned int mod_time
;
797 int included_p
; /* Non-zero if referenced by the Line Number Program. */
798 struct symtab
*symtab
; /* The associated symbol table, if any. */
801 /* The start and end of the statement program following this
802 header. These point into dwarf2_per_objfile->line_buffer. */
803 gdb_byte
*statement_program_start
, *statement_program_end
;
806 /* When we construct a partial symbol table entry we only
807 need this much information. */
808 struct partial_die_info
810 /* Offset of this DIE. */
813 /* DWARF-2 tag for this DIE. */
814 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
816 /* Assorted flags describing the data found in this DIE. */
817 unsigned int has_children
: 1;
818 unsigned int is_external
: 1;
819 unsigned int is_declaration
: 1;
820 unsigned int has_type
: 1;
821 unsigned int has_specification
: 1;
822 unsigned int has_pc_info
: 1;
823 unsigned int may_be_inlined
: 1;
825 /* Flag set if the SCOPE field of this structure has been
827 unsigned int scope_set
: 1;
829 /* Flag set if the DIE has a byte_size attribute. */
830 unsigned int has_byte_size
: 1;
832 /* Flag set if any of the DIE's children are template arguments. */
833 unsigned int has_template_arguments
: 1;
835 /* Flag set if fixup_partial_die has been called on this die. */
836 unsigned int fixup_called
: 1;
838 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
839 unsigned int is_dwz
: 1;
841 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
842 unsigned int spec_is_dwz
: 1;
844 /* The name of this DIE. Normally the value of DW_AT_name, but
845 sometimes a default name for unnamed DIEs. */
848 /* The linkage name, if present. */
849 const char *linkage_name
;
851 /* The scope to prepend to our children. This is generally
852 allocated on the comp_unit_obstack, so will disappear
853 when this compilation unit leaves the cache. */
856 /* Some data associated with the partial DIE. The tag determines
857 which field is live. */
860 /* The location description associated with this DIE, if any. */
861 struct dwarf_block
*locdesc
;
862 /* The offset of an import, for DW_TAG_imported_unit. */
866 /* If HAS_PC_INFO, the PC range associated with this DIE. */
870 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
871 DW_AT_sibling, if any. */
872 /* NOTE: This member isn't strictly necessary, read_partial_die could
873 return DW_AT_sibling values to its caller load_partial_dies. */
876 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
877 DW_AT_specification (or DW_AT_abstract_origin or
879 sect_offset spec_offset
;
881 /* Pointers to this DIE's parent, first child, and next sibling,
883 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
886 /* This data structure holds the information of an abbrev. */
889 unsigned int number
; /* number identifying abbrev */
890 enum dwarf_tag tag
; /* dwarf tag */
891 unsigned short has_children
; /* boolean */
892 unsigned short num_attrs
; /* number of attributes */
893 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
894 struct abbrev_info
*next
; /* next in chain */
899 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
900 ENUM_BITFIELD(dwarf_form
) form
: 16;
903 /* Size of abbrev_table.abbrev_hash_table. */
904 #define ABBREV_HASH_SIZE 121
906 /* Top level data structure to contain an abbreviation table. */
910 /* Where the abbrev table came from.
911 This is used as a sanity check when the table is used. */
914 /* Storage for the abbrev table. */
915 struct obstack abbrev_obstack
;
917 /* Hash table of abbrevs.
918 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
919 It could be statically allocated, but the previous code didn't so we
921 struct abbrev_info
**abbrevs
;
924 /* Attributes have a name and a value. */
927 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
928 ENUM_BITFIELD(dwarf_form
) form
: 15;
930 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
931 field should be in u.str (existing only for DW_STRING) but it is kept
932 here for better struct attribute alignment. */
933 unsigned int string_is_canonical
: 1;
938 struct dwarf_block
*blk
;
942 struct signatured_type
*signatured_type
;
947 /* This data structure holds a complete die structure. */
950 /* DWARF-2 tag for this DIE. */
951 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
953 /* Number of attributes */
954 unsigned char num_attrs
;
956 /* True if we're presently building the full type name for the
957 type derived from this DIE. */
958 unsigned char building_fullname
: 1;
963 /* Offset in .debug_info or .debug_types section. */
966 /* The dies in a compilation unit form an n-ary tree. PARENT
967 points to this die's parent; CHILD points to the first child of
968 this node; and all the children of a given node are chained
969 together via their SIBLING fields. */
970 struct die_info
*child
; /* Its first child, if any. */
971 struct die_info
*sibling
; /* Its next sibling, if any. */
972 struct die_info
*parent
; /* Its parent, if any. */
974 /* An array of attributes, with NUM_ATTRS elements. There may be
975 zero, but it's not common and zero-sized arrays are not
976 sufficiently portable C. */
977 struct attribute attrs
[1];
980 /* Get at parts of an attribute structure. */
982 #define DW_STRING(attr) ((attr)->u.str)
983 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
984 #define DW_UNSND(attr) ((attr)->u.unsnd)
985 #define DW_BLOCK(attr) ((attr)->u.blk)
986 #define DW_SND(attr) ((attr)->u.snd)
987 #define DW_ADDR(attr) ((attr)->u.addr)
988 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
990 /* Blocks are a bunch of untyped bytes. */
995 /* Valid only if SIZE is not zero. */
999 #ifndef ATTR_ALLOC_CHUNK
1000 #define ATTR_ALLOC_CHUNK 4
1003 /* Allocate fields for structs, unions and enums in this size. */
1004 #ifndef DW_FIELD_ALLOC_CHUNK
1005 #define DW_FIELD_ALLOC_CHUNK 4
1008 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1009 but this would require a corresponding change in unpack_field_as_long
1011 static int bits_per_byte
= 8;
1013 /* The routines that read and process dies for a C struct or C++ class
1014 pass lists of data member fields and lists of member function fields
1015 in an instance of a field_info structure, as defined below. */
1018 /* List of data member and baseclasses fields. */
1021 struct nextfield
*next
;
1026 *fields
, *baseclasses
;
1028 /* Number of fields (including baseclasses). */
1031 /* Number of baseclasses. */
1034 /* Set if the accesibility of one of the fields is not public. */
1035 int non_public_fields
;
1037 /* Member function fields array, entries are allocated in the order they
1038 are encountered in the object file. */
1041 struct nextfnfield
*next
;
1042 struct fn_field fnfield
;
1046 /* Member function fieldlist array, contains name of possibly overloaded
1047 member function, number of overloaded member functions and a pointer
1048 to the head of the member function field chain. */
1053 struct nextfnfield
*head
;
1057 /* Number of entries in the fnfieldlists array. */
1060 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1061 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1062 struct typedef_field_list
1064 struct typedef_field field
;
1065 struct typedef_field_list
*next
;
1067 *typedef_field_list
;
1068 unsigned typedef_field_list_count
;
1071 /* One item on the queue of compilation units to read in full symbols
1073 struct dwarf2_queue_item
1075 struct dwarf2_per_cu_data
*per_cu
;
1076 enum language pretend_language
;
1077 struct dwarf2_queue_item
*next
;
1080 /* The current queue. */
1081 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1083 /* Loaded secondary compilation units are kept in memory until they
1084 have not been referenced for the processing of this many
1085 compilation units. Set this to zero to disable caching. Cache
1086 sizes of up to at least twenty will improve startup time for
1087 typical inter-CU-reference binaries, at an obvious memory cost. */
1088 static int dwarf2_max_cache_age
= 5;
1090 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1091 struct cmd_list_element
*c
, const char *value
)
1093 fprintf_filtered (file
, _("The upper bound on the age of cached "
1094 "dwarf2 compilation units is %s.\n"),
1099 /* Various complaints about symbol reading that don't abort the process. */
1102 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1104 complaint (&symfile_complaints
,
1105 _("statement list doesn't fit in .debug_line section"));
1109 dwarf2_debug_line_missing_file_complaint (void)
1111 complaint (&symfile_complaints
,
1112 _(".debug_line section has line data without a file"));
1116 dwarf2_debug_line_missing_end_sequence_complaint (void)
1118 complaint (&symfile_complaints
,
1119 _(".debug_line section has line "
1120 "program sequence without an end"));
1124 dwarf2_complex_location_expr_complaint (void)
1126 complaint (&symfile_complaints
, _("location expression too complex"));
1130 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1133 complaint (&symfile_complaints
,
1134 _("const value length mismatch for '%s', got %d, expected %d"),
1139 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1141 complaint (&symfile_complaints
,
1142 _("debug info runs off end of %s section"
1144 section
->asection
->name
,
1145 bfd_get_filename (section
->asection
->owner
));
1149 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1151 complaint (&symfile_complaints
,
1152 _("macro debug info contains a "
1153 "malformed macro definition:\n`%s'"),
1158 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1160 complaint (&symfile_complaints
,
1161 _("invalid attribute class or form for '%s' in '%s'"),
1165 /* local function prototypes */
1167 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1169 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1172 static void dwarf2_find_base_address (struct die_info
*die
,
1173 struct dwarf2_cu
*cu
);
1175 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1177 static void scan_partial_symbols (struct partial_die_info
*,
1178 CORE_ADDR
*, CORE_ADDR
*,
1179 int, struct dwarf2_cu
*);
1181 static void add_partial_symbol (struct partial_die_info
*,
1182 struct dwarf2_cu
*);
1184 static void add_partial_namespace (struct partial_die_info
*pdi
,
1185 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1186 int need_pc
, struct dwarf2_cu
*cu
);
1188 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1189 CORE_ADDR
*highpc
, int need_pc
,
1190 struct dwarf2_cu
*cu
);
1192 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1193 struct dwarf2_cu
*cu
);
1195 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1196 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1197 int need_pc
, struct dwarf2_cu
*cu
);
1199 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
1201 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1203 static struct abbrev_info
*abbrev_table_lookup_abbrev
1204 (const struct abbrev_table
*, unsigned int);
1206 static struct abbrev_table
*abbrev_table_read_table
1207 (struct dwarf2_section_info
*, sect_offset
);
1209 static void abbrev_table_free (struct abbrev_table
*);
1211 static void abbrev_table_free_cleanup (void *);
1213 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1214 struct dwarf2_section_info
*);
1216 static void dwarf2_free_abbrev_table (void *);
1218 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1220 static struct partial_die_info
*load_partial_dies
1221 (const struct die_reader_specs
*, gdb_byte
*, int);
1223 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1224 struct partial_die_info
*,
1225 struct abbrev_info
*,
1229 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1230 struct dwarf2_cu
*);
1232 static void fixup_partial_die (struct partial_die_info
*,
1233 struct dwarf2_cu
*);
1235 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1236 struct attribute
*, struct attr_abbrev
*,
1239 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
1241 static int read_1_signed_byte (bfd
*, gdb_byte
*);
1243 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
1245 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
1247 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
1249 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1252 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1254 static LONGEST read_checked_initial_length_and_offset
1255 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1256 unsigned int *, unsigned int *);
1258 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1261 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1263 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1266 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1268 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1270 static char *read_indirect_string (bfd
*, gdb_byte
*,
1271 const struct comp_unit_head
*,
1274 static char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1276 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1278 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1280 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1283 static char *read_str_index (const struct die_reader_specs
*reader
,
1284 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1286 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1288 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1289 struct dwarf2_cu
*);
1291 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1294 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1295 struct dwarf2_cu
*cu
);
1297 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1299 static struct die_info
*die_specification (struct die_info
*die
,
1300 struct dwarf2_cu
**);
1302 static void free_line_header (struct line_header
*lh
);
1304 static void add_file_name (struct line_header
*, char *, unsigned int,
1305 unsigned int, unsigned int);
1307 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1308 struct dwarf2_cu
*cu
);
1310 static void dwarf_decode_lines (struct line_header
*, const char *,
1311 struct dwarf2_cu
*, struct partial_symtab
*,
1314 static void dwarf2_start_subfile (char *, const char *, const char *);
1316 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1317 char *, char *, CORE_ADDR
);
1319 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1320 struct dwarf2_cu
*);
1322 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1323 struct dwarf2_cu
*, struct symbol
*);
1325 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1326 struct dwarf2_cu
*);
1328 static void dwarf2_const_value_attr (struct attribute
*attr
,
1331 struct obstack
*obstack
,
1332 struct dwarf2_cu
*cu
, LONGEST
*value
,
1334 struct dwarf2_locexpr_baton
**baton
);
1336 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1338 static int need_gnat_info (struct dwarf2_cu
*);
1340 static struct type
*die_descriptive_type (struct die_info
*,
1341 struct dwarf2_cu
*);
1343 static void set_descriptive_type (struct type
*, struct die_info
*,
1344 struct dwarf2_cu
*);
1346 static struct type
*die_containing_type (struct die_info
*,
1347 struct dwarf2_cu
*);
1349 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1350 struct dwarf2_cu
*);
1352 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1354 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1356 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1358 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1359 const char *suffix
, int physname
,
1360 struct dwarf2_cu
*cu
);
1362 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1364 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1366 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1368 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1370 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1372 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1373 struct dwarf2_cu
*, struct partial_symtab
*);
1375 static int dwarf2_get_pc_bounds (struct die_info
*,
1376 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1377 struct partial_symtab
*);
1379 static void get_scope_pc_bounds (struct die_info
*,
1380 CORE_ADDR
*, CORE_ADDR
*,
1381 struct dwarf2_cu
*);
1383 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1384 CORE_ADDR
, struct dwarf2_cu
*);
1386 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1387 struct dwarf2_cu
*);
1389 static void dwarf2_attach_fields_to_type (struct field_info
*,
1390 struct type
*, struct dwarf2_cu
*);
1392 static void dwarf2_add_member_fn (struct field_info
*,
1393 struct die_info
*, struct type
*,
1394 struct dwarf2_cu
*);
1396 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1398 struct dwarf2_cu
*);
1400 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1402 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1404 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1406 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1408 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1410 static struct type
*read_module_type (struct die_info
*die
,
1411 struct dwarf2_cu
*cu
);
1413 static const char *namespace_name (struct die_info
*die
,
1414 int *is_anonymous
, struct dwarf2_cu
*);
1416 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1418 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1420 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1421 struct dwarf2_cu
*);
1423 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1425 gdb_byte
**new_info_ptr
,
1426 struct die_info
*parent
);
1428 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1430 gdb_byte
**new_info_ptr
,
1431 struct die_info
*parent
);
1433 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1434 struct die_info
**, gdb_byte
*, int *, int);
1436 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1437 struct die_info
**, gdb_byte
*, int *);
1439 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1441 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1444 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1446 static const char *dwarf2_full_name (char *name
,
1447 struct die_info
*die
,
1448 struct dwarf2_cu
*cu
);
1450 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1451 struct dwarf2_cu
**);
1453 static const char *dwarf_tag_name (unsigned int);
1455 static const char *dwarf_attr_name (unsigned int);
1457 static const char *dwarf_form_name (unsigned int);
1459 static char *dwarf_bool_name (unsigned int);
1461 static const char *dwarf_type_encoding_name (unsigned int);
1463 static struct die_info
*sibling_die (struct die_info
*);
1465 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1467 static void dump_die_for_error (struct die_info
*);
1469 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1472 /*static*/ void dump_die (struct die_info
*, int max_level
);
1474 static void store_in_ref_table (struct die_info
*,
1475 struct dwarf2_cu
*);
1477 static int is_ref_attr (struct attribute
*);
1479 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1481 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1483 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1485 struct dwarf2_cu
**);
1487 static struct die_info
*follow_die_ref (struct die_info
*,
1489 struct dwarf2_cu
**);
1491 static struct die_info
*follow_die_sig (struct die_info
*,
1493 struct dwarf2_cu
**);
1495 static struct signatured_type
*lookup_signatured_type_at_offset
1496 (struct objfile
*objfile
,
1497 struct dwarf2_section_info
*section
, sect_offset offset
);
1499 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1501 static void read_signatured_type (struct signatured_type
*);
1503 static struct type_unit_group
*get_type_unit_group
1504 (struct dwarf2_cu
*, struct attribute
*);
1506 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1508 /* memory allocation interface */
1510 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1512 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1514 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1517 static int attr_form_is_block (struct attribute
*);
1519 static int attr_form_is_section_offset (struct attribute
*);
1521 static int attr_form_is_constant (struct attribute
*);
1523 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1524 struct dwarf2_loclist_baton
*baton
,
1525 struct attribute
*attr
);
1527 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1529 struct dwarf2_cu
*cu
);
1531 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1533 struct abbrev_info
*abbrev
);
1535 static void free_stack_comp_unit (void *);
1537 static hashval_t
partial_die_hash (const void *item
);
1539 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1541 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1542 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1544 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1545 struct dwarf2_per_cu_data
*per_cu
);
1547 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1548 struct die_info
*comp_unit_die
,
1549 enum language pretend_language
);
1551 static void free_heap_comp_unit (void *);
1553 static void free_cached_comp_units (void *);
1555 static void age_cached_comp_units (void);
1557 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1559 static struct type
*set_die_type (struct die_info
*, struct type
*,
1560 struct dwarf2_cu
*);
1562 static void create_all_comp_units (struct objfile
*);
1564 static int create_all_type_units (struct objfile
*);
1566 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1569 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1572 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1575 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1576 struct dwarf2_per_cu_data
*);
1578 static void dwarf2_mark (struct dwarf2_cu
*);
1580 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1582 static struct type
*get_die_type_at_offset (sect_offset
,
1583 struct dwarf2_per_cu_data
*per_cu
);
1585 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1587 static void dwarf2_release_queue (void *dummy
);
1589 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1590 enum language pretend_language
);
1592 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1593 struct dwarf2_per_cu_data
*per_cu
,
1594 enum language pretend_language
);
1596 static void process_queue (void);
1598 static void find_file_and_directory (struct die_info
*die
,
1599 struct dwarf2_cu
*cu
,
1600 char **name
, char **comp_dir
);
1602 static char *file_full_name (int file
, struct line_header
*lh
,
1603 const char *comp_dir
);
1605 static gdb_byte
*read_and_check_comp_unit_head
1606 (struct comp_unit_head
*header
,
1607 struct dwarf2_section_info
*section
,
1608 struct dwarf2_section_info
*abbrev_section
, gdb_byte
*info_ptr
,
1609 int is_debug_types_section
);
1611 static void init_cutu_and_read_dies
1612 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1613 int use_existing_cu
, int keep
,
1614 die_reader_func_ftype
*die_reader_func
, void *data
);
1616 static void init_cutu_and_read_dies_simple
1617 (struct dwarf2_per_cu_data
*this_cu
,
1618 die_reader_func_ftype
*die_reader_func
, void *data
);
1620 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1622 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1624 static struct dwo_unit
*lookup_dwo_comp_unit
1625 (struct dwarf2_per_cu_data
*, char *, const char *, ULONGEST
);
1627 static struct dwo_unit
*lookup_dwo_type_unit
1628 (struct signatured_type
*, char *, const char *);
1630 static void free_dwo_file_cleanup (void *);
1632 static void process_cu_includes (void);
1636 /* Convert VALUE between big- and little-endian. */
1638 byte_swap (offset_type value
)
1642 result
= (value
& 0xff) << 24;
1643 result
|= (value
& 0xff00) << 8;
1644 result
|= (value
& 0xff0000) >> 8;
1645 result
|= (value
& 0xff000000) >> 24;
1649 #define MAYBE_SWAP(V) byte_swap (V)
1652 #define MAYBE_SWAP(V) (V)
1653 #endif /* WORDS_BIGENDIAN */
1655 /* The suffix for an index file. */
1656 #define INDEX_SUFFIX ".gdb-index"
1658 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1659 struct dwarf2_cu
*cu
);
1661 /* Try to locate the sections we need for DWARF 2 debugging
1662 information and return true if we have enough to do something.
1663 NAMES points to the dwarf2 section names, or is NULL if the standard
1664 ELF names are used. */
1667 dwarf2_has_info (struct objfile
*objfile
,
1668 const struct dwarf2_debug_sections
*names
)
1670 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1671 if (!dwarf2_per_objfile
)
1673 /* Initialize per-objfile state. */
1674 struct dwarf2_per_objfile
*data
1675 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1677 memset (data
, 0, sizeof (*data
));
1678 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1679 dwarf2_per_objfile
= data
;
1681 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1683 dwarf2_per_objfile
->objfile
= objfile
;
1685 return (dwarf2_per_objfile
->info
.asection
!= NULL
1686 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1689 /* When loading sections, we look either for uncompressed section or for
1690 compressed section names. */
1693 section_is_p (const char *section_name
,
1694 const struct dwarf2_section_names
*names
)
1696 if (names
->normal
!= NULL
1697 && strcmp (section_name
, names
->normal
) == 0)
1699 if (names
->compressed
!= NULL
1700 && strcmp (section_name
, names
->compressed
) == 0)
1705 /* This function is mapped across the sections and remembers the
1706 offset and size of each of the debugging sections we are interested
1710 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1712 const struct dwarf2_debug_sections
*names
;
1715 names
= &dwarf2_elf_names
;
1717 names
= (const struct dwarf2_debug_sections
*) vnames
;
1719 if (section_is_p (sectp
->name
, &names
->info
))
1721 dwarf2_per_objfile
->info
.asection
= sectp
;
1722 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1724 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1726 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1727 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1729 else if (section_is_p (sectp
->name
, &names
->line
))
1731 dwarf2_per_objfile
->line
.asection
= sectp
;
1732 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1734 else if (section_is_p (sectp
->name
, &names
->loc
))
1736 dwarf2_per_objfile
->loc
.asection
= sectp
;
1737 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1739 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1741 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1742 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1744 else if (section_is_p (sectp
->name
, &names
->macro
))
1746 dwarf2_per_objfile
->macro
.asection
= sectp
;
1747 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1749 else if (section_is_p (sectp
->name
, &names
->str
))
1751 dwarf2_per_objfile
->str
.asection
= sectp
;
1752 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1754 else if (section_is_p (sectp
->name
, &names
->addr
))
1756 dwarf2_per_objfile
->addr
.asection
= sectp
;
1757 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1759 else if (section_is_p (sectp
->name
, &names
->frame
))
1761 dwarf2_per_objfile
->frame
.asection
= sectp
;
1762 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1764 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1766 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1768 if (aflag
& SEC_HAS_CONTENTS
)
1770 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1771 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1774 else if (section_is_p (sectp
->name
, &names
->ranges
))
1776 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1777 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1779 else if (section_is_p (sectp
->name
, &names
->types
))
1781 struct dwarf2_section_info type_section
;
1783 memset (&type_section
, 0, sizeof (type_section
));
1784 type_section
.asection
= sectp
;
1785 type_section
.size
= bfd_get_section_size (sectp
);
1787 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1790 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1792 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1793 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1796 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1797 && bfd_section_vma (abfd
, sectp
) == 0)
1798 dwarf2_per_objfile
->has_section_at_zero
= 1;
1801 /* A helper function that decides whether a section is empty,
1805 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1807 return info
->asection
== NULL
|| info
->size
== 0;
1810 /* Read the contents of the section INFO.
1811 OBJFILE is the main object file, but not necessarily the file where
1812 the section comes from. E.g., for DWO files INFO->asection->owner
1813 is the bfd of the DWO file.
1814 If the section is compressed, uncompress it before returning. */
1817 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1819 asection
*sectp
= info
->asection
;
1821 gdb_byte
*buf
, *retbuf
;
1822 unsigned char header
[4];
1826 info
->buffer
= NULL
;
1829 if (dwarf2_section_empty_p (info
))
1832 abfd
= sectp
->owner
;
1834 /* If the section has relocations, we must read it ourselves.
1835 Otherwise we attach it to the BFD. */
1836 if ((sectp
->flags
& SEC_RELOC
) == 0)
1838 const gdb_byte
*bytes
= gdb_bfd_map_section (sectp
, &info
->size
);
1840 /* We have to cast away const here for historical reasons.
1841 Fixing dwarf2read to be const-correct would be quite nice. */
1842 info
->buffer
= (gdb_byte
*) bytes
;
1846 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1849 /* When debugging .o files, we may need to apply relocations; see
1850 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1851 We never compress sections in .o files, so we only need to
1852 try this when the section is not compressed. */
1853 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1856 info
->buffer
= retbuf
;
1860 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1861 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1862 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1863 bfd_get_filename (abfd
));
1866 /* A helper function that returns the size of a section in a safe way.
1867 If you are positive that the section has been read before using the
1868 size, then it is safe to refer to the dwarf2_section_info object's
1869 "size" field directly. In other cases, you must call this
1870 function, because for compressed sections the size field is not set
1871 correctly until the section has been read. */
1873 static bfd_size_type
1874 dwarf2_section_size (struct objfile
*objfile
,
1875 struct dwarf2_section_info
*info
)
1878 dwarf2_read_section (objfile
, info
);
1882 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1886 dwarf2_get_section_info (struct objfile
*objfile
,
1887 enum dwarf2_section_enum sect
,
1888 asection
**sectp
, gdb_byte
**bufp
,
1889 bfd_size_type
*sizep
)
1891 struct dwarf2_per_objfile
*data
1892 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1893 struct dwarf2_section_info
*info
;
1895 /* We may see an objfile without any DWARF, in which case we just
1906 case DWARF2_DEBUG_FRAME
:
1907 info
= &data
->frame
;
1909 case DWARF2_EH_FRAME
:
1910 info
= &data
->eh_frame
;
1913 gdb_assert_not_reached ("unexpected section");
1916 dwarf2_read_section (objfile
, info
);
1918 *sectp
= info
->asection
;
1919 *bufp
= info
->buffer
;
1920 *sizep
= info
->size
;
1923 /* A helper function to find the sections for a .dwz file. */
1926 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
1928 struct dwz_file
*dwz_file
= arg
;
1930 /* Note that we only support the standard ELF names, because .dwz
1931 is ELF-only (at the time of writing). */
1932 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
1934 dwz_file
->abbrev
.asection
= sectp
;
1935 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
1937 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
1939 dwz_file
->info
.asection
= sectp
;
1940 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
1942 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
1944 dwz_file
->str
.asection
= sectp
;
1945 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
1947 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
1949 dwz_file
->line
.asection
= sectp
;
1950 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
1952 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
1954 dwz_file
->macro
.asection
= sectp
;
1955 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
1957 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
1959 dwz_file
->gdb_index
.asection
= sectp
;
1960 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
1964 /* Open the separate '.dwz' debug file, if needed. Error if the file
1967 static struct dwz_file
*
1968 dwarf2_get_dwz_file (void)
1970 bfd
*abfd
, *dwz_bfd
;
1973 struct cleanup
*cleanup
;
1974 const char *filename
;
1975 struct dwz_file
*result
;
1977 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
1978 return dwarf2_per_objfile
->dwz_file
;
1980 abfd
= dwarf2_per_objfile
->objfile
->obfd
;
1981 section
= bfd_get_section_by_name (abfd
, ".gnu_debugaltlink");
1982 if (section
== NULL
)
1983 error (_("could not find '.gnu_debugaltlink' section"));
1984 if (!bfd_malloc_and_get_section (abfd
, section
, &data
))
1985 error (_("could not read '.gnu_debugaltlink' section: %s"),
1986 bfd_errmsg (bfd_get_error ()));
1987 cleanup
= make_cleanup (xfree
, data
);
1990 if (!IS_ABSOLUTE_PATH (filename
))
1992 char *abs
= gdb_realpath (dwarf2_per_objfile
->objfile
->name
);
1995 make_cleanup (xfree
, abs
);
1996 abs
= ldirname (abs
);
1997 make_cleanup (xfree
, abs
);
1999 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2000 make_cleanup (xfree
, rel
);
2004 /* The format is just a NUL-terminated file name, followed by the
2005 build-id. For now, though, we ignore the build-id. */
2006 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2007 if (dwz_bfd
== NULL
)
2008 error (_("could not read '%s': %s"), filename
,
2009 bfd_errmsg (bfd_get_error ()));
2011 if (!bfd_check_format (dwz_bfd
, bfd_object
))
2013 gdb_bfd_unref (dwz_bfd
);
2014 error (_("file '%s' was not usable: %s"), filename
,
2015 bfd_errmsg (bfd_get_error ()));
2018 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2020 result
->dwz_bfd
= dwz_bfd
;
2022 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2024 do_cleanups (cleanup
);
2029 /* DWARF quick_symbols_functions support. */
2031 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2032 unique line tables, so we maintain a separate table of all .debug_line
2033 derived entries to support the sharing.
2034 All the quick functions need is the list of file names. We discard the
2035 line_header when we're done and don't need to record it here. */
2036 struct quick_file_names
2038 /* The data used to construct the hash key. */
2039 struct stmt_list_hash hash
;
2041 /* The number of entries in file_names, real_names. */
2042 unsigned int num_file_names
;
2044 /* The file names from the line table, after being run through
2046 const char **file_names
;
2048 /* The file names from the line table after being run through
2049 gdb_realpath. These are computed lazily. */
2050 const char **real_names
;
2053 /* When using the index (and thus not using psymtabs), each CU has an
2054 object of this type. This is used to hold information needed by
2055 the various "quick" methods. */
2056 struct dwarf2_per_cu_quick_data
2058 /* The file table. This can be NULL if there was no file table
2059 or it's currently not read in.
2060 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2061 struct quick_file_names
*file_names
;
2063 /* The corresponding symbol table. This is NULL if symbols for this
2064 CU have not yet been read. */
2065 struct symtab
*symtab
;
2067 /* A temporary mark bit used when iterating over all CUs in
2068 expand_symtabs_matching. */
2069 unsigned int mark
: 1;
2071 /* True if we've tried to read the file table and found there isn't one.
2072 There will be no point in trying to read it again next time. */
2073 unsigned int no_file_data
: 1;
2076 /* Utility hash function for a stmt_list_hash. */
2079 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2083 if (stmt_list_hash
->dwo_unit
!= NULL
)
2084 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2085 v
+= stmt_list_hash
->line_offset
.sect_off
;
2089 /* Utility equality function for a stmt_list_hash. */
2092 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2093 const struct stmt_list_hash
*rhs
)
2095 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2097 if (lhs
->dwo_unit
!= NULL
2098 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2101 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2104 /* Hash function for a quick_file_names. */
2107 hash_file_name_entry (const void *e
)
2109 const struct quick_file_names
*file_data
= e
;
2111 return hash_stmt_list_entry (&file_data
->hash
);
2114 /* Equality function for a quick_file_names. */
2117 eq_file_name_entry (const void *a
, const void *b
)
2119 const struct quick_file_names
*ea
= a
;
2120 const struct quick_file_names
*eb
= b
;
2122 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2125 /* Delete function for a quick_file_names. */
2128 delete_file_name_entry (void *e
)
2130 struct quick_file_names
*file_data
= e
;
2133 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2135 xfree ((void*) file_data
->file_names
[i
]);
2136 if (file_data
->real_names
)
2137 xfree ((void*) file_data
->real_names
[i
]);
2140 /* The space for the struct itself lives on objfile_obstack,
2141 so we don't free it here. */
2144 /* Create a quick_file_names hash table. */
2147 create_quick_file_names_table (unsigned int nr_initial_entries
)
2149 return htab_create_alloc (nr_initial_entries
,
2150 hash_file_name_entry
, eq_file_name_entry
,
2151 delete_file_name_entry
, xcalloc
, xfree
);
2154 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2155 have to be created afterwards. You should call age_cached_comp_units after
2156 processing PER_CU->CU. dw2_setup must have been already called. */
2159 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2161 if (per_cu
->is_debug_types
)
2162 load_full_type_unit (per_cu
);
2164 load_full_comp_unit (per_cu
, language_minimal
);
2166 gdb_assert (per_cu
->cu
!= NULL
);
2168 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2171 /* Read in the symbols for PER_CU. */
2174 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2176 struct cleanup
*back_to
;
2178 /* Skip type_unit_groups, reading the type units they contain
2179 is handled elsewhere. */
2180 if (IS_TYPE_UNIT_GROUP (per_cu
))
2183 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2185 if (dwarf2_per_objfile
->using_index
2186 ? per_cu
->v
.quick
->symtab
== NULL
2187 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2189 queue_comp_unit (per_cu
, language_minimal
);
2195 /* Age the cache, releasing compilation units that have not
2196 been used recently. */
2197 age_cached_comp_units ();
2199 do_cleanups (back_to
);
2202 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2203 the objfile from which this CU came. Returns the resulting symbol
2206 static struct symtab
*
2207 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2209 gdb_assert (dwarf2_per_objfile
->using_index
);
2210 if (!per_cu
->v
.quick
->symtab
)
2212 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2213 increment_reading_symtab ();
2214 dw2_do_instantiate_symtab (per_cu
);
2215 process_cu_includes ();
2216 do_cleanups (back_to
);
2218 return per_cu
->v
.quick
->symtab
;
2221 /* Return the CU given its index.
2223 This is intended for loops like:
2225 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2226 + dwarf2_per_objfile->n_type_units); ++i)
2228 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2234 static struct dwarf2_per_cu_data
*
2235 dw2_get_cu (int index
)
2237 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2239 index
-= dwarf2_per_objfile
->n_comp_units
;
2240 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2241 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2244 return dwarf2_per_objfile
->all_comp_units
[index
];
2247 /* Return the primary CU given its index.
2248 The difference between this function and dw2_get_cu is in the handling
2249 of type units (TUs). Here we return the type_unit_group object.
2251 This is intended for loops like:
2253 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2254 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2256 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2262 static struct dwarf2_per_cu_data
*
2263 dw2_get_primary_cu (int index
)
2265 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2267 index
-= dwarf2_per_objfile
->n_comp_units
;
2268 gdb_assert (index
< dwarf2_per_objfile
->n_type_unit_groups
);
2269 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2272 return dwarf2_per_objfile
->all_comp_units
[index
];
2275 /* A helper function that knows how to read a 64-bit value in a way
2276 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
2280 extract_cu_value (const char *bytes
, ULONGEST
*result
)
2282 if (sizeof (ULONGEST
) < 8)
2286 /* Ignore the upper 4 bytes if they are all zero. */
2287 for (i
= 0; i
< 4; ++i
)
2288 if (bytes
[i
+ 4] != 0)
2291 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
2294 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2298 /* A helper for create_cus_from_index that handles a given list of
2302 create_cus_from_index_list (struct objfile
*objfile
,
2303 const gdb_byte
*cu_list
, offset_type n_elements
,
2304 struct dwarf2_section_info
*section
,
2310 for (i
= 0; i
< n_elements
; i
+= 2)
2312 struct dwarf2_per_cu_data
*the_cu
;
2313 ULONGEST offset
, length
;
2315 if (!extract_cu_value (cu_list
, &offset
)
2316 || !extract_cu_value (cu_list
+ 8, &length
))
2320 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2321 struct dwarf2_per_cu_data
);
2322 the_cu
->offset
.sect_off
= offset
;
2323 the_cu
->length
= length
;
2324 the_cu
->objfile
= objfile
;
2325 the_cu
->info_or_types_section
= section
;
2326 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2327 struct dwarf2_per_cu_quick_data
);
2328 the_cu
->is_dwz
= is_dwz
;
2329 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2335 /* Read the CU list from the mapped index, and use it to create all
2336 the CU objects for this objfile. Return 0 if something went wrong,
2337 1 if everything went ok. */
2340 create_cus_from_index (struct objfile
*objfile
,
2341 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2342 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2344 struct dwz_file
*dwz
;
2346 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2347 dwarf2_per_objfile
->all_comp_units
2348 = obstack_alloc (&objfile
->objfile_obstack
,
2349 dwarf2_per_objfile
->n_comp_units
2350 * sizeof (struct dwarf2_per_cu_data
*));
2352 if (!create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2353 &dwarf2_per_objfile
->info
, 0, 0))
2356 if (dwz_elements
== 0)
2359 dwz
= dwarf2_get_dwz_file ();
2360 return create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
,
2361 &dwz
->info
, 1, cu_list_elements
/ 2);
2364 /* Create the signatured type hash table from the index. */
2367 create_signatured_type_table_from_index (struct objfile
*objfile
,
2368 struct dwarf2_section_info
*section
,
2369 const gdb_byte
*bytes
,
2370 offset_type elements
)
2373 htab_t sig_types_hash
;
2375 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2376 dwarf2_per_objfile
->all_type_units
2377 = obstack_alloc (&objfile
->objfile_obstack
,
2378 dwarf2_per_objfile
->n_type_units
2379 * sizeof (struct signatured_type
*));
2381 sig_types_hash
= allocate_signatured_type_table (objfile
);
2383 for (i
= 0; i
< elements
; i
+= 3)
2385 struct signatured_type
*sig_type
;
2386 ULONGEST offset
, type_offset_in_tu
, signature
;
2389 if (!extract_cu_value (bytes
, &offset
)
2390 || !extract_cu_value (bytes
+ 8, &type_offset_in_tu
))
2392 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2395 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2396 struct signatured_type
);
2397 sig_type
->signature
= signature
;
2398 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2399 sig_type
->per_cu
.is_debug_types
= 1;
2400 sig_type
->per_cu
.info_or_types_section
= section
;
2401 sig_type
->per_cu
.offset
.sect_off
= offset
;
2402 sig_type
->per_cu
.objfile
= objfile
;
2403 sig_type
->per_cu
.v
.quick
2404 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2405 struct dwarf2_per_cu_quick_data
);
2407 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2410 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2413 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2418 /* Read the address map data from the mapped index, and use it to
2419 populate the objfile's psymtabs_addrmap. */
2422 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2424 const gdb_byte
*iter
, *end
;
2425 struct obstack temp_obstack
;
2426 struct addrmap
*mutable_map
;
2427 struct cleanup
*cleanup
;
2430 obstack_init (&temp_obstack
);
2431 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2432 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2434 iter
= index
->address_table
;
2435 end
= iter
+ index
->address_table_size
;
2437 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2441 ULONGEST hi
, lo
, cu_index
;
2442 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2444 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2446 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2449 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2450 dw2_get_cu (cu_index
));
2453 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2454 &objfile
->objfile_obstack
);
2455 do_cleanups (cleanup
);
2458 /* The hash function for strings in the mapped index. This is the same as
2459 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2460 implementation. This is necessary because the hash function is tied to the
2461 format of the mapped index file. The hash values do not have to match with
2464 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2467 mapped_index_string_hash (int index_version
, const void *p
)
2469 const unsigned char *str
= (const unsigned char *) p
;
2473 while ((c
= *str
++) != 0)
2475 if (index_version
>= 5)
2477 r
= r
* 67 + c
- 113;
2483 /* Find a slot in the mapped index INDEX for the object named NAME.
2484 If NAME is found, set *VEC_OUT to point to the CU vector in the
2485 constant pool and return 1. If NAME cannot be found, return 0. */
2488 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2489 offset_type
**vec_out
)
2491 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2493 offset_type slot
, step
;
2494 int (*cmp
) (const char *, const char *);
2496 if (current_language
->la_language
== language_cplus
2497 || current_language
->la_language
== language_java
2498 || current_language
->la_language
== language_fortran
)
2500 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2502 const char *paren
= strchr (name
, '(');
2508 dup
= xmalloc (paren
- name
+ 1);
2509 memcpy (dup
, name
, paren
- name
);
2510 dup
[paren
- name
] = 0;
2512 make_cleanup (xfree
, dup
);
2517 /* Index version 4 did not support case insensitive searches. But the
2518 indices for case insensitive languages are built in lowercase, therefore
2519 simulate our NAME being searched is also lowercased. */
2520 hash
= mapped_index_string_hash ((index
->version
== 4
2521 && case_sensitivity
== case_sensitive_off
2522 ? 5 : index
->version
),
2525 slot
= hash
& (index
->symbol_table_slots
- 1);
2526 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2527 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2531 /* Convert a slot number to an offset into the table. */
2532 offset_type i
= 2 * slot
;
2534 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2536 do_cleanups (back_to
);
2540 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2541 if (!cmp (name
, str
))
2543 *vec_out
= (offset_type
*) (index
->constant_pool
2544 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2545 do_cleanups (back_to
);
2549 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2553 /* A helper function that reads the .gdb_index from SECTION and fills
2554 in MAP. FILENAME is the name of the file containing the section;
2555 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2556 ok to use deprecated sections.
2558 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2559 out parameters that are filled in with information about the CU and
2560 TU lists in the section.
2562 Returns 1 if all went well, 0 otherwise. */
2565 read_index_from_section (struct objfile
*objfile
,
2566 const char *filename
,
2568 struct dwarf2_section_info
*section
,
2569 struct mapped_index
*map
,
2570 const gdb_byte
**cu_list
,
2571 offset_type
*cu_list_elements
,
2572 const gdb_byte
**types_list
,
2573 offset_type
*types_list_elements
)
2576 offset_type version
;
2577 offset_type
*metadata
;
2580 if (dwarf2_section_empty_p (section
))
2583 /* Older elfutils strip versions could keep the section in the main
2584 executable while splitting it for the separate debug info file. */
2585 if ((bfd_get_file_flags (section
->asection
) & SEC_HAS_CONTENTS
) == 0)
2588 dwarf2_read_section (objfile
, section
);
2590 addr
= section
->buffer
;
2591 /* Version check. */
2592 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2593 /* Versions earlier than 3 emitted every copy of a psymbol. This
2594 causes the index to behave very poorly for certain requests. Version 3
2595 contained incomplete addrmap. So, it seems better to just ignore such
2599 static int warning_printed
= 0;
2600 if (!warning_printed
)
2602 warning (_("Skipping obsolete .gdb_index section in %s."),
2604 warning_printed
= 1;
2608 /* Index version 4 uses a different hash function than index version
2611 Versions earlier than 6 did not emit psymbols for inlined
2612 functions. Using these files will cause GDB not to be able to
2613 set breakpoints on inlined functions by name, so we ignore these
2614 indices unless the --use-deprecated-index-sections command line
2615 option was supplied. */
2616 if (version
< 6 && !deprecated_ok
)
2618 static int warning_printed
= 0;
2619 if (!warning_printed
)
2621 warning (_("Skipping deprecated .gdb_index section in %s, pass "
2622 "--use-deprecated-index-sections to use them anyway"),
2624 warning_printed
= 1;
2628 /* Indexes with higher version than the one supported by GDB may be no
2629 longer backward compatible. */
2633 map
->version
= version
;
2634 map
->total_size
= section
->size
;
2636 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2639 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2640 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2644 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2645 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2646 - MAYBE_SWAP (metadata
[i
]))
2650 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2651 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2652 - MAYBE_SWAP (metadata
[i
]));
2655 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2656 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2657 - MAYBE_SWAP (metadata
[i
]))
2658 / (2 * sizeof (offset_type
)));
2661 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2667 /* Read the index file. If everything went ok, initialize the "quick"
2668 elements of all the CUs and return 1. Otherwise, return 0. */
2671 dwarf2_read_index (struct objfile
*objfile
)
2673 struct mapped_index local_map
, *map
;
2674 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2675 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2677 if (!read_index_from_section (objfile
, objfile
->name
,
2678 use_deprecated_index_sections
,
2679 &dwarf2_per_objfile
->gdb_index
, &local_map
,
2680 &cu_list
, &cu_list_elements
,
2681 &types_list
, &types_list_elements
))
2684 /* Don't use the index if it's empty. */
2685 if (local_map
.symbol_table_slots
== 0)
2688 /* If there is a .dwz file, read it so we can get its CU list as
2690 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
2692 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
2693 struct mapped_index dwz_map
;
2694 const gdb_byte
*dwz_types_ignore
;
2695 offset_type dwz_types_elements_ignore
;
2697 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
2699 &dwz
->gdb_index
, &dwz_map
,
2700 &dwz_list
, &dwz_list_elements
,
2702 &dwz_types_elements_ignore
))
2704 warning (_("could not read '.gdb_index' section from %s; skipping"),
2705 bfd_get_filename (dwz
->dwz_bfd
));
2710 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
,
2711 dwz_list
, dwz_list_elements
))
2714 if (types_list_elements
)
2716 struct dwarf2_section_info
*section
;
2718 /* We can only handle a single .debug_types when we have an
2720 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2723 section
= VEC_index (dwarf2_section_info_def
,
2724 dwarf2_per_objfile
->types
, 0);
2726 if (!create_signatured_type_table_from_index (objfile
, section
,
2728 types_list_elements
))
2732 create_addrmap_from_index (objfile
, &local_map
);
2734 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
2737 dwarf2_per_objfile
->index_table
= map
;
2738 dwarf2_per_objfile
->using_index
= 1;
2739 dwarf2_per_objfile
->quick_file_names_table
=
2740 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2745 /* A helper for the "quick" functions which sets the global
2746 dwarf2_per_objfile according to OBJFILE. */
2749 dw2_setup (struct objfile
*objfile
)
2751 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2752 gdb_assert (dwarf2_per_objfile
);
2755 /* Reader function for dw2_build_type_unit_groups. */
2758 dw2_build_type_unit_groups_reader (const struct die_reader_specs
*reader
,
2760 struct die_info
*type_unit_die
,
2764 struct dwarf2_cu
*cu
= reader
->cu
;
2765 struct attribute
*attr
;
2766 struct type_unit_group
*tu_group
;
2768 gdb_assert (data
== NULL
);
2773 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
2774 /* Call this for its side-effect of creating the associated
2775 struct type_unit_group if it doesn't already exist. */
2776 tu_group
= get_type_unit_group (cu
, attr
);
2779 /* Build dwarf2_per_objfile->type_unit_groups.
2780 This function may be called multiple times. */
2783 dw2_build_type_unit_groups (void)
2785 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
2786 build_type_unit_groups (dw2_build_type_unit_groups_reader
, NULL
);
2789 /* die_reader_func for dw2_get_file_names. */
2792 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2794 struct die_info
*comp_unit_die
,
2798 struct dwarf2_cu
*cu
= reader
->cu
;
2799 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2800 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2801 struct dwarf2_per_cu_data
*lh_cu
;
2802 struct line_header
*lh
;
2803 struct attribute
*attr
;
2805 char *name
, *comp_dir
;
2807 struct quick_file_names
*qfn
;
2808 unsigned int line_offset
;
2810 /* Our callers never want to match partial units -- instead they
2811 will match the enclosing full CU. */
2812 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2814 this_cu
->v
.quick
->no_file_data
= 1;
2818 /* If we're reading the line header for TUs, store it in the "per_cu"
2820 if (this_cu
->is_debug_types
)
2822 struct type_unit_group
*tu_group
= data
;
2824 gdb_assert (tu_group
!= NULL
);
2825 lh_cu
= &tu_group
->per_cu
;
2834 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2837 struct quick_file_names find_entry
;
2839 line_offset
= DW_UNSND (attr
);
2841 /* We may have already read in this line header (TU line header sharing).
2842 If we have we're done. */
2843 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2844 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2845 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2846 &find_entry
, INSERT
);
2849 lh_cu
->v
.quick
->file_names
= *slot
;
2853 lh
= dwarf_decode_line_header (line_offset
, cu
);
2857 lh_cu
->v
.quick
->no_file_data
= 1;
2861 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2862 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2863 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2864 gdb_assert (slot
!= NULL
);
2867 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2869 qfn
->num_file_names
= lh
->num_file_names
;
2870 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2871 lh
->num_file_names
* sizeof (char *));
2872 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2873 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2874 qfn
->real_names
= NULL
;
2876 free_line_header (lh
);
2878 lh_cu
->v
.quick
->file_names
= qfn
;
2881 /* A helper for the "quick" functions which attempts to read the line
2882 table for THIS_CU. */
2884 static struct quick_file_names
*
2885 dw2_get_file_names (struct objfile
*objfile
,
2886 struct dwarf2_per_cu_data
*this_cu
)
2888 /* For TUs this should only be called on the parent group. */
2889 if (this_cu
->is_debug_types
)
2890 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2892 if (this_cu
->v
.quick
->file_names
!= NULL
)
2893 return this_cu
->v
.quick
->file_names
;
2894 /* If we know there is no line data, no point in looking again. */
2895 if (this_cu
->v
.quick
->no_file_data
)
2898 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2899 in the stub for CUs, there's is no need to lookup the DWO file.
2900 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2902 if (this_cu
->is_debug_types
)
2904 struct type_unit_group
*tu_group
= this_cu
->s
.type_unit_group
;
2906 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2907 dw2_get_file_names_reader
, tu_group
);
2910 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2912 if (this_cu
->v
.quick
->no_file_data
)
2914 return this_cu
->v
.quick
->file_names
;
2917 /* A helper for the "quick" functions which computes and caches the
2918 real path for a given file name from the line table. */
2921 dw2_get_real_path (struct objfile
*objfile
,
2922 struct quick_file_names
*qfn
, int index
)
2924 if (qfn
->real_names
== NULL
)
2925 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2926 qfn
->num_file_names
, sizeof (char *));
2928 if (qfn
->real_names
[index
] == NULL
)
2929 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2931 return qfn
->real_names
[index
];
2934 static struct symtab
*
2935 dw2_find_last_source_symtab (struct objfile
*objfile
)
2939 dw2_setup (objfile
);
2940 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2941 return dw2_instantiate_symtab (dw2_get_cu (index
));
2944 /* Traversal function for dw2_forget_cached_source_info. */
2947 dw2_free_cached_file_names (void **slot
, void *info
)
2949 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2951 if (file_data
->real_names
)
2955 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2957 xfree ((void*) file_data
->real_names
[i
]);
2958 file_data
->real_names
[i
] = NULL
;
2966 dw2_forget_cached_source_info (struct objfile
*objfile
)
2968 dw2_setup (objfile
);
2970 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2971 dw2_free_cached_file_names
, NULL
);
2974 /* Helper function for dw2_map_symtabs_matching_filename that expands
2975 the symtabs and calls the iterator. */
2978 dw2_map_expand_apply (struct objfile
*objfile
,
2979 struct dwarf2_per_cu_data
*per_cu
,
2981 const char *full_path
, const char *real_path
,
2982 int (*callback
) (struct symtab
*, void *),
2985 struct symtab
*last_made
= objfile
->symtabs
;
2987 /* Don't visit already-expanded CUs. */
2988 if (per_cu
->v
.quick
->symtab
)
2991 /* This may expand more than one symtab, and we want to iterate over
2993 dw2_instantiate_symtab (per_cu
);
2995 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2996 objfile
->symtabs
, last_made
);
2999 /* Implementation of the map_symtabs_matching_filename method. */
3002 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3003 const char *full_path
, const char *real_path
,
3004 int (*callback
) (struct symtab
*, void *),
3008 const char *name_basename
= lbasename (name
);
3009 int name_len
= strlen (name
);
3010 int is_abs
= IS_ABSOLUTE_PATH (name
);
3012 dw2_setup (objfile
);
3014 dw2_build_type_unit_groups ();
3016 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3017 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3020 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3021 struct quick_file_names
*file_data
;
3023 /* We only need to look at symtabs not already expanded. */
3024 if (per_cu
->v
.quick
->symtab
)
3027 file_data
= dw2_get_file_names (objfile
, per_cu
);
3028 if (file_data
== NULL
)
3031 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3033 const char *this_name
= file_data
->file_names
[j
];
3035 if (FILENAME_CMP (name
, this_name
) == 0
3036 || (!is_abs
&& compare_filenames_for_search (this_name
,
3039 if (dw2_map_expand_apply (objfile
, per_cu
,
3040 name
, full_path
, real_path
,
3045 /* Before we invoke realpath, which can get expensive when many
3046 files are involved, do a quick comparison of the basenames. */
3047 if (! basenames_may_differ
3048 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3051 if (full_path
!= NULL
)
3053 const char *this_real_name
= dw2_get_real_path (objfile
,
3056 if (this_real_name
!= NULL
3057 && (FILENAME_CMP (full_path
, this_real_name
) == 0
3059 && compare_filenames_for_search (this_real_name
,
3062 if (dw2_map_expand_apply (objfile
, per_cu
,
3063 name
, full_path
, real_path
,
3069 if (real_path
!= NULL
)
3071 const char *this_real_name
= dw2_get_real_path (objfile
,
3074 if (this_real_name
!= NULL
3075 && (FILENAME_CMP (real_path
, this_real_name
) == 0
3077 && compare_filenames_for_search (this_real_name
,
3080 if (dw2_map_expand_apply (objfile
, per_cu
,
3081 name
, full_path
, real_path
,
3092 static struct symtab
*
3093 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3094 const char *name
, domain_enum domain
)
3096 /* We do all the work in the pre_expand_symtabs_matching hook
3101 /* A helper function that expands all symtabs that hold an object
3102 named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
3103 symbols in block BLOCK_KIND. */
3106 dw2_do_expand_symtabs_matching (struct objfile
*objfile
,
3107 int want_specific_block
,
3108 enum block_enum block_kind
,
3109 const char *name
, domain_enum domain
)
3111 struct mapped_index
*index
;
3113 dw2_setup (objfile
);
3115 index
= dwarf2_per_objfile
->index_table
;
3117 /* index_table is NULL if OBJF_READNOW. */
3122 if (find_slot_in_mapped_hash (index
, name
, &vec
))
3124 offset_type i
, len
= MAYBE_SWAP (*vec
);
3125 for (i
= 0; i
< len
; ++i
)
3127 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[i
+ 1]);
3128 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3129 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3130 int want_static
= block_kind
!= GLOBAL_BLOCK
;
3131 /* This value is only valid for index versions >= 7. */
3132 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3133 gdb_index_symbol_kind symbol_kind
=
3134 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3136 if (want_specific_block
3137 && index
->version
>= 7
3138 && want_static
!= is_static
)
3141 /* Only check the symbol's kind if it has one.
3142 Indices prior to version 7 don't record it. */
3143 if (index
->version
>= 7)
3148 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3149 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3150 /* Some types are also in VAR_DOMAIN. */
3151 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3155 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3159 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3167 dw2_instantiate_symtab (per_cu
);
3174 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
3175 enum block_enum block_kind
, const char *name
,
3178 dw2_do_expand_symtabs_matching (objfile
, 1, block_kind
, name
, domain
);
3182 dw2_print_stats (struct objfile
*objfile
)
3186 dw2_setup (objfile
);
3188 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3189 + dwarf2_per_objfile
->n_type_units
); ++i
)
3191 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3193 if (!per_cu
->v
.quick
->symtab
)
3196 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3200 dw2_dump (struct objfile
*objfile
)
3202 /* Nothing worth printing. */
3206 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3207 struct section_offsets
*delta
)
3209 /* There's nothing to relocate here. */
3213 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3214 const char *func_name
)
3216 /* Note: It doesn't matter what we pass for block_kind here. */
3217 dw2_do_expand_symtabs_matching (objfile
, 0, GLOBAL_BLOCK
, func_name
,
3222 dw2_expand_all_symtabs (struct objfile
*objfile
)
3226 dw2_setup (objfile
);
3228 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3229 + dwarf2_per_objfile
->n_type_units
); ++i
)
3231 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3233 dw2_instantiate_symtab (per_cu
);
3238 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3239 const char *filename
)
3243 dw2_setup (objfile
);
3245 /* We don't need to consider type units here.
3246 This is only called for examining code, e.g. expand_line_sal.
3247 There can be an order of magnitude (or more) more type units
3248 than comp units, and we avoid them if we can. */
3250 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3253 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3254 struct quick_file_names
*file_data
;
3256 /* We only need to look at symtabs not already expanded. */
3257 if (per_cu
->v
.quick
->symtab
)
3260 file_data
= dw2_get_file_names (objfile
, per_cu
);
3261 if (file_data
== NULL
)
3264 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3266 const char *this_name
= file_data
->file_names
[j
];
3267 if (FILENAME_CMP (this_name
, filename
) == 0)
3269 dw2_instantiate_symtab (per_cu
);
3276 /* A helper function for dw2_find_symbol_file that finds the primary
3277 file name for a given CU. This is a die_reader_func. */
3280 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3282 struct die_info
*comp_unit_die
,
3286 const char **result_ptr
= data
;
3287 struct dwarf2_cu
*cu
= reader
->cu
;
3288 struct attribute
*attr
;
3290 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3294 *result_ptr
= DW_STRING (attr
);
3298 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3300 struct dwarf2_per_cu_data
*per_cu
;
3302 struct quick_file_names
*file_data
;
3303 const char *filename
;
3305 dw2_setup (objfile
);
3307 /* index_table is NULL if OBJF_READNOW. */
3308 if (!dwarf2_per_objfile
->index_table
)
3312 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3314 struct blockvector
*bv
= BLOCKVECTOR (s
);
3315 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3316 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3319 return sym
->symtab
->filename
;
3324 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3328 /* Note that this just looks at the very first one named NAME -- but
3329 actually we are looking for a function. find_main_filename
3330 should be rewritten so that it doesn't require a custom hook. It
3331 could just use the ordinary symbol tables. */
3332 /* vec[0] is the length, which must always be >0. */
3333 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3335 if (per_cu
->v
.quick
->symtab
!= NULL
)
3336 return per_cu
->v
.quick
->symtab
->filename
;
3338 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3339 dw2_get_primary_filename_reader
, &filename
);
3345 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3346 struct objfile
*objfile
, int global
,
3347 int (*callback
) (struct block
*,
3348 struct symbol
*, void *),
3349 void *data
, symbol_compare_ftype
*match
,
3350 symbol_compare_ftype
*ordered_compare
)
3352 /* Currently unimplemented; used for Ada. The function can be called if the
3353 current language is Ada for a non-Ada objfile using GNU index. As Ada
3354 does not look for non-Ada symbols this function should just return. */
3358 dw2_expand_symtabs_matching
3359 (struct objfile
*objfile
,
3360 int (*file_matcher
) (const char *, void *),
3361 int (*name_matcher
) (const char *, void *),
3362 enum search_domain kind
,
3367 struct mapped_index
*index
;
3369 dw2_setup (objfile
);
3371 /* index_table is NULL if OBJF_READNOW. */
3372 if (!dwarf2_per_objfile
->index_table
)
3374 index
= dwarf2_per_objfile
->index_table
;
3376 if (file_matcher
!= NULL
)
3378 struct cleanup
*cleanup
;
3379 htab_t visited_found
, visited_not_found
;
3381 dw2_build_type_unit_groups ();
3383 visited_found
= htab_create_alloc (10,
3384 htab_hash_pointer
, htab_eq_pointer
,
3385 NULL
, xcalloc
, xfree
);
3386 cleanup
= make_cleanup_htab_delete (visited_found
);
3387 visited_not_found
= htab_create_alloc (10,
3388 htab_hash_pointer
, htab_eq_pointer
,
3389 NULL
, xcalloc
, xfree
);
3390 make_cleanup_htab_delete (visited_not_found
);
3392 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3393 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3396 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3397 struct quick_file_names
*file_data
;
3400 per_cu
->v
.quick
->mark
= 0;
3402 /* We only need to look at symtabs not already expanded. */
3403 if (per_cu
->v
.quick
->symtab
)
3406 file_data
= dw2_get_file_names (objfile
, per_cu
);
3407 if (file_data
== NULL
)
3410 if (htab_find (visited_not_found
, file_data
) != NULL
)
3412 else if (htab_find (visited_found
, file_data
) != NULL
)
3414 per_cu
->v
.quick
->mark
= 1;
3418 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3420 if (file_matcher (file_data
->file_names
[j
], data
))
3422 per_cu
->v
.quick
->mark
= 1;
3427 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3429 : visited_not_found
,
3434 do_cleanups (cleanup
);
3437 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3439 offset_type idx
= 2 * iter
;
3441 offset_type
*vec
, vec_len
, vec_idx
;
3443 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3446 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3448 if (! (*name_matcher
) (name
, data
))
3451 /* The name was matched, now expand corresponding CUs that were
3453 vec
= (offset_type
*) (index
->constant_pool
3454 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3455 vec_len
= MAYBE_SWAP (vec
[0]);
3456 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3458 struct dwarf2_per_cu_data
*per_cu
;
3459 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3460 gdb_index_symbol_kind symbol_kind
=
3461 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3462 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3464 /* Don't crash on bad data. */
3465 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3466 + dwarf2_per_objfile
->n_type_units
))
3469 /* Only check the symbol's kind if it has one.
3470 Indices prior to version 7 don't record it. */
3471 if (index
->version
>= 7)
3475 case VARIABLES_DOMAIN
:
3476 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3479 case FUNCTIONS_DOMAIN
:
3480 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3484 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3492 per_cu
= dw2_get_cu (cu_index
);
3493 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3494 dw2_instantiate_symtab (per_cu
);
3499 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3502 static struct symtab
*
3503 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3507 if (BLOCKVECTOR (symtab
) != NULL
3508 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3511 if (symtab
->includes
== NULL
)
3514 for (i
= 0; symtab
->includes
[i
]; ++i
)
3516 struct symtab
*s
= symtab
->includes
[i
];
3518 s
= recursively_find_pc_sect_symtab (s
, pc
);
3526 static struct symtab
*
3527 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3528 struct minimal_symbol
*msymbol
,
3530 struct obj_section
*section
,
3533 struct dwarf2_per_cu_data
*data
;
3534 struct symtab
*result
;
3536 dw2_setup (objfile
);
3538 if (!objfile
->psymtabs_addrmap
)
3541 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3545 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3546 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3547 paddress (get_objfile_arch (objfile
), pc
));
3549 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3550 gdb_assert (result
!= NULL
);
3555 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3556 void *data
, int need_fullname
)
3559 struct cleanup
*cleanup
;
3560 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3561 NULL
, xcalloc
, xfree
);
3563 cleanup
= make_cleanup_htab_delete (visited
);
3564 dw2_setup (objfile
);
3566 dw2_build_type_unit_groups ();
3568 /* We can ignore file names coming from already-expanded CUs. */
3569 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3570 + dwarf2_per_objfile
->n_type_units
); ++i
)
3572 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3574 if (per_cu
->v
.quick
->symtab
)
3576 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3579 *slot
= per_cu
->v
.quick
->file_names
;
3583 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3584 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3587 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3588 struct quick_file_names
*file_data
;
3591 /* We only need to look at symtabs not already expanded. */
3592 if (per_cu
->v
.quick
->symtab
)
3595 file_data
= dw2_get_file_names (objfile
, per_cu
);
3596 if (file_data
== NULL
)
3599 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3602 /* Already visited. */
3607 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3609 const char *this_real_name
;
3612 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3614 this_real_name
= NULL
;
3615 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3619 do_cleanups (cleanup
);
3623 dw2_has_symbols (struct objfile
*objfile
)
3628 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3631 dw2_find_last_source_symtab
,
3632 dw2_forget_cached_source_info
,
3633 dw2_map_symtabs_matching_filename
,
3635 dw2_pre_expand_symtabs_matching
,
3639 dw2_expand_symtabs_for_function
,
3640 dw2_expand_all_symtabs
,
3641 dw2_expand_symtabs_with_filename
,
3642 dw2_find_symbol_file
,
3643 dw2_map_matching_symbols
,
3644 dw2_expand_symtabs_matching
,
3645 dw2_find_pc_sect_symtab
,
3646 dw2_map_symbol_filenames
3649 /* Initialize for reading DWARF for this objfile. Return 0 if this
3650 file will use psymtabs, or 1 if using the GNU index. */
3653 dwarf2_initialize_objfile (struct objfile
*objfile
)
3655 /* If we're about to read full symbols, don't bother with the
3656 indices. In this case we also don't care if some other debug
3657 format is making psymtabs, because they are all about to be
3659 if ((objfile
->flags
& OBJF_READNOW
))
3663 dwarf2_per_objfile
->using_index
= 1;
3664 create_all_comp_units (objfile
);
3665 create_all_type_units (objfile
);
3666 dwarf2_per_objfile
->quick_file_names_table
=
3667 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3669 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3670 + dwarf2_per_objfile
->n_type_units
); ++i
)
3672 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3674 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3675 struct dwarf2_per_cu_quick_data
);
3678 /* Return 1 so that gdb sees the "quick" functions. However,
3679 these functions will be no-ops because we will have expanded
3684 if (dwarf2_read_index (objfile
))
3692 /* Build a partial symbol table. */
3695 dwarf2_build_psymtabs (struct objfile
*objfile
)
3697 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3699 init_psymbol_list (objfile
, 1024);
3702 dwarf2_build_psymtabs_hard (objfile
);
3705 /* Return the total length of the CU described by HEADER. */
3708 get_cu_length (const struct comp_unit_head
*header
)
3710 return header
->initial_length_size
+ header
->length
;
3713 /* Return TRUE if OFFSET is within CU_HEADER. */
3716 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3718 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3719 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3721 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3724 /* Find the base address of the compilation unit for range lists and
3725 location lists. It will normally be specified by DW_AT_low_pc.
3726 In DWARF-3 draft 4, the base address could be overridden by
3727 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3728 compilation units with discontinuous ranges. */
3731 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3733 struct attribute
*attr
;
3736 cu
->base_address
= 0;
3738 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3741 cu
->base_address
= DW_ADDR (attr
);
3746 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3749 cu
->base_address
= DW_ADDR (attr
);
3755 /* Read in the comp unit header information from the debug_info at info_ptr.
3756 NOTE: This leaves members offset, first_die_offset to be filled in
3760 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3761 gdb_byte
*info_ptr
, bfd
*abfd
)
3764 unsigned int bytes_read
;
3766 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3767 cu_header
->initial_length_size
= bytes_read
;
3768 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3769 info_ptr
+= bytes_read
;
3770 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3772 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3774 info_ptr
+= bytes_read
;
3775 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3777 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3778 if (signed_addr
< 0)
3779 internal_error (__FILE__
, __LINE__
,
3780 _("read_comp_unit_head: dwarf from non elf file"));
3781 cu_header
->signed_addr_p
= signed_addr
;
3786 /* Helper function that returns the proper abbrev section for
3789 static struct dwarf2_section_info
*
3790 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3792 struct dwarf2_section_info
*abbrev
;
3794 if (this_cu
->is_dwz
)
3795 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3797 abbrev
= &dwarf2_per_objfile
->abbrev
;
3802 /* Subroutine of read_and_check_comp_unit_head and
3803 read_and_check_type_unit_head to simplify them.
3804 Perform various error checking on the header. */
3807 error_check_comp_unit_head (struct comp_unit_head
*header
,
3808 struct dwarf2_section_info
*section
,
3809 struct dwarf2_section_info
*abbrev_section
)
3811 bfd
*abfd
= section
->asection
->owner
;
3812 const char *filename
= bfd_get_filename (abfd
);
3814 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3815 error (_("Dwarf Error: wrong version in compilation unit header "
3816 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3819 if (header
->abbrev_offset
.sect_off
3820 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3821 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3822 "(offset 0x%lx + 6) [in module %s]"),
3823 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3826 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3827 avoid potential 32-bit overflow. */
3828 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3830 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3831 "(offset 0x%lx + 0) [in module %s]"),
3832 (long) header
->length
, (long) header
->offset
.sect_off
,
3836 /* Read in a CU/TU header and perform some basic error checking.
3837 The contents of the header are stored in HEADER.
3838 The result is a pointer to the start of the first DIE. */
3841 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3842 struct dwarf2_section_info
*section
,
3843 struct dwarf2_section_info
*abbrev_section
,
3845 int is_debug_types_section
)
3847 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3848 bfd
*abfd
= section
->asection
->owner
;
3850 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3852 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3854 /* If we're reading a type unit, skip over the signature and
3855 type_offset fields. */
3856 if (is_debug_types_section
)
3857 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3859 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3861 error_check_comp_unit_head (header
, section
, abbrev_section
);
3866 /* Read in the types comp unit header information from .debug_types entry at
3867 types_ptr. The result is a pointer to one past the end of the header. */
3870 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3871 struct dwarf2_section_info
*section
,
3872 struct dwarf2_section_info
*abbrev_section
,
3874 ULONGEST
*signature
,
3875 cu_offset
*type_offset_in_tu
)
3877 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3878 bfd
*abfd
= section
->asection
->owner
;
3880 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3882 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3884 /* If we're reading a type unit, skip over the signature and
3885 type_offset fields. */
3886 if (signature
!= NULL
)
3887 *signature
= read_8_bytes (abfd
, info_ptr
);
3889 if (type_offset_in_tu
!= NULL
)
3890 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3891 header
->offset_size
);
3892 info_ptr
+= header
->offset_size
;
3894 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3896 error_check_comp_unit_head (header
, section
, abbrev_section
);
3901 /* Fetch the abbreviation table offset from a comp or type unit header. */
3904 read_abbrev_offset (struct dwarf2_section_info
*section
,
3907 bfd
*abfd
= section
->asection
->owner
;
3909 unsigned int length
, initial_length_size
, offset_size
;
3910 sect_offset abbrev_offset
;
3912 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
3913 info_ptr
= section
->buffer
+ offset
.sect_off
;
3914 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
3915 offset_size
= initial_length_size
== 4 ? 4 : 8;
3916 info_ptr
+= initial_length_size
+ 2 /*version*/;
3917 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
3918 return abbrev_offset
;
3921 /* Allocate a new partial symtab for file named NAME and mark this new
3922 partial symtab as being an include of PST. */
3925 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3926 struct objfile
*objfile
)
3928 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3930 subpst
->section_offsets
= pst
->section_offsets
;
3931 subpst
->textlow
= 0;
3932 subpst
->texthigh
= 0;
3934 subpst
->dependencies
= (struct partial_symtab
**)
3935 obstack_alloc (&objfile
->objfile_obstack
,
3936 sizeof (struct partial_symtab
*));
3937 subpst
->dependencies
[0] = pst
;
3938 subpst
->number_of_dependencies
= 1;
3940 subpst
->globals_offset
= 0;
3941 subpst
->n_global_syms
= 0;
3942 subpst
->statics_offset
= 0;
3943 subpst
->n_static_syms
= 0;
3944 subpst
->symtab
= NULL
;
3945 subpst
->read_symtab
= pst
->read_symtab
;
3948 /* No private part is necessary for include psymtabs. This property
3949 can be used to differentiate between such include psymtabs and
3950 the regular ones. */
3951 subpst
->read_symtab_private
= NULL
;
3954 /* Read the Line Number Program data and extract the list of files
3955 included by the source file represented by PST. Build an include
3956 partial symtab for each of these included files. */
3959 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3960 struct die_info
*die
,
3961 struct partial_symtab
*pst
)
3963 struct line_header
*lh
= NULL
;
3964 struct attribute
*attr
;
3966 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3968 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
3970 return; /* No linetable, so no includes. */
3972 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3973 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3975 free_line_header (lh
);
3979 hash_signatured_type (const void *item
)
3981 const struct signatured_type
*sig_type
= item
;
3983 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3984 return sig_type
->signature
;
3988 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
3990 const struct signatured_type
*lhs
= item_lhs
;
3991 const struct signatured_type
*rhs
= item_rhs
;
3993 return lhs
->signature
== rhs
->signature
;
3996 /* Allocate a hash table for signatured types. */
3999 allocate_signatured_type_table (struct objfile
*objfile
)
4001 return htab_create_alloc_ex (41,
4002 hash_signatured_type
,
4005 &objfile
->objfile_obstack
,
4006 hashtab_obstack_allocate
,
4007 dummy_obstack_deallocate
);
4010 /* A helper function to add a signatured type CU to a table. */
4013 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4015 struct signatured_type
*sigt
= *slot
;
4016 struct signatured_type
***datap
= datum
;
4024 /* Create the hash table of all entries in the .debug_types section.
4025 DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
4026 The result is a pointer to the hash table or NULL if there are
4030 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4031 VEC (dwarf2_section_info_def
) *types
)
4033 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4034 htab_t types_htab
= NULL
;
4036 struct dwarf2_section_info
*section
;
4037 struct dwarf2_section_info
*abbrev_section
;
4039 if (VEC_empty (dwarf2_section_info_def
, types
))
4042 abbrev_section
= (dwo_file
!= NULL
4043 ? &dwo_file
->sections
.abbrev
4044 : &dwarf2_per_objfile
->abbrev
);
4046 if (dwarf2_read_debug
)
4047 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4048 dwo_file
? ".dwo" : "",
4049 bfd_get_filename (abbrev_section
->asection
->owner
));
4052 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4056 gdb_byte
*info_ptr
, *end_ptr
;
4057 struct dwarf2_section_info
*abbrev_section
;
4059 dwarf2_read_section (objfile
, section
);
4060 info_ptr
= section
->buffer
;
4062 if (info_ptr
== NULL
)
4065 /* We can't set abfd until now because the section may be empty or
4066 not present, in which case section->asection will be NULL. */
4067 abfd
= section
->asection
->owner
;
4070 abbrev_section
= &dwo_file
->sections
.abbrev
;
4072 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4074 if (types_htab
== NULL
)
4077 types_htab
= allocate_dwo_unit_table (objfile
);
4079 types_htab
= allocate_signatured_type_table (objfile
);
4082 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4083 because we don't need to read any dies: the signature is in the
4086 end_ptr
= info_ptr
+ section
->size
;
4087 while (info_ptr
< end_ptr
)
4090 cu_offset type_offset_in_tu
;
4092 struct signatured_type
*sig_type
;
4093 struct dwo_unit
*dwo_tu
;
4095 gdb_byte
*ptr
= info_ptr
;
4096 struct comp_unit_head header
;
4097 unsigned int length
;
4099 offset
.sect_off
= ptr
- section
->buffer
;
4101 /* We need to read the type's signature in order to build the hash
4102 table, but we don't need anything else just yet. */
4104 ptr
= read_and_check_type_unit_head (&header
, section
,
4105 abbrev_section
, ptr
,
4106 &signature
, &type_offset_in_tu
);
4108 length
= get_cu_length (&header
);
4110 /* Skip dummy type units. */
4111 if (ptr
>= info_ptr
+ length
4112 || peek_abbrev_code (abfd
, ptr
) == 0)
4121 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4123 dwo_tu
->dwo_file
= dwo_file
;
4124 dwo_tu
->signature
= signature
;
4125 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4126 dwo_tu
->info_or_types_section
= section
;
4127 dwo_tu
->offset
= offset
;
4128 dwo_tu
->length
= length
;
4132 /* N.B.: type_offset is not usable if this type uses a DWO file.
4133 The real type_offset is in the DWO file. */
4135 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4136 struct signatured_type
);
4137 sig_type
->signature
= signature
;
4138 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4139 sig_type
->per_cu
.objfile
= objfile
;
4140 sig_type
->per_cu
.is_debug_types
= 1;
4141 sig_type
->per_cu
.info_or_types_section
= section
;
4142 sig_type
->per_cu
.offset
= offset
;
4143 sig_type
->per_cu
.length
= length
;
4146 slot
= htab_find_slot (types_htab
,
4147 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4149 gdb_assert (slot
!= NULL
);
4152 sect_offset dup_offset
;
4156 const struct dwo_unit
*dup_tu
= *slot
;
4158 dup_offset
= dup_tu
->offset
;
4162 const struct signatured_type
*dup_tu
= *slot
;
4164 dup_offset
= dup_tu
->per_cu
.offset
;
4167 complaint (&symfile_complaints
,
4168 _("debug type entry at offset 0x%x is duplicate to the "
4169 "entry at offset 0x%x, signature 0x%s"),
4170 offset
.sect_off
, dup_offset
.sect_off
,
4171 phex (signature
, sizeof (signature
)));
4173 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4175 if (dwarf2_read_debug
)
4176 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4178 phex (signature
, sizeof (signature
)));
4187 /* Create the hash table of all entries in the .debug_types section,
4188 and initialize all_type_units.
4189 The result is zero if there is an error (e.g. missing .debug_types section),
4190 otherwise non-zero. */
4193 create_all_type_units (struct objfile
*objfile
)
4196 struct signatured_type
**iter
;
4198 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4199 if (types_htab
== NULL
)
4201 dwarf2_per_objfile
->signatured_types
= NULL
;
4205 dwarf2_per_objfile
->signatured_types
= types_htab
;
4207 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4208 dwarf2_per_objfile
->all_type_units
4209 = obstack_alloc (&objfile
->objfile_obstack
,
4210 dwarf2_per_objfile
->n_type_units
4211 * sizeof (struct signatured_type
*));
4212 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4213 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4214 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4215 == dwarf2_per_objfile
->n_type_units
);
4220 /* Lookup a signature based type for DW_FORM_ref_sig8.
4221 Returns NULL if signature SIG is not present in the table. */
4223 static struct signatured_type
*
4224 lookup_signatured_type (ULONGEST sig
)
4226 struct signatured_type find_entry
, *entry
;
4228 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4230 complaint (&symfile_complaints
,
4231 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4235 find_entry
.signature
= sig
;
4236 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4240 /* Low level DIE reading support. */
4242 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4245 init_cu_die_reader (struct die_reader_specs
*reader
,
4246 struct dwarf2_cu
*cu
,
4247 struct dwarf2_section_info
*section
,
4248 struct dwo_file
*dwo_file
)
4250 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4251 reader
->abfd
= section
->asection
->owner
;
4253 reader
->dwo_file
= dwo_file
;
4254 reader
->die_section
= section
;
4255 reader
->buffer
= section
->buffer
;
4256 reader
->buffer_end
= section
->buffer
+ section
->size
;
4259 /* Initialize a CU (or TU) and read its DIEs.
4260 If the CU defers to a DWO file, read the DWO file as well.
4262 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4263 Otherwise the table specified in the comp unit header is read in and used.
4264 This is an optimization for when we already have the abbrev table.
4266 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4267 Otherwise, a new CU is allocated with xmalloc.
4269 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4270 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4272 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4273 linker) then DIE_READER_FUNC will not get called. */
4276 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4277 struct abbrev_table
*abbrev_table
,
4278 int use_existing_cu
, int keep
,
4279 die_reader_func_ftype
*die_reader_func
,
4282 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4283 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4284 bfd
*abfd
= section
->asection
->owner
;
4285 struct dwarf2_cu
*cu
;
4286 gdb_byte
*begin_info_ptr
, *info_ptr
;
4287 struct die_reader_specs reader
;
4288 struct die_info
*comp_unit_die
;
4290 struct attribute
*attr
;
4291 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4292 struct signatured_type
*sig_type
= NULL
;
4293 struct dwarf2_section_info
*abbrev_section
;
4294 /* Non-zero if CU currently points to a DWO file and we need to
4295 reread it. When this happens we need to reread the skeleton die
4296 before we can reread the DWO file. */
4297 int rereading_dwo_cu
= 0;
4299 if (dwarf2_die_debug
)
4300 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4301 this_cu
->is_debug_types
? "type" : "comp",
4302 this_cu
->offset
.sect_off
);
4304 if (use_existing_cu
)
4307 cleanups
= make_cleanup (null_cleanup
, NULL
);
4309 /* This is cheap if the section is already read in. */
4310 dwarf2_read_section (objfile
, section
);
4312 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4314 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4316 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4320 /* If this CU is from a DWO file we need to start over, we need to
4321 refetch the attributes from the skeleton CU.
4322 This could be optimized by retrieving those attributes from when we
4323 were here the first time: the previous comp_unit_die was stored in
4324 comp_unit_obstack. But there's no data yet that we need this
4326 if (cu
->dwo_unit
!= NULL
)
4327 rereading_dwo_cu
= 1;
4331 /* If !use_existing_cu, this_cu->cu must be NULL. */
4332 gdb_assert (this_cu
->cu
== NULL
);
4334 cu
= xmalloc (sizeof (*cu
));
4335 init_one_comp_unit (cu
, this_cu
);
4337 /* If an error occurs while loading, release our storage. */
4338 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4341 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4343 /* We already have the header, there's no need to read it in again. */
4344 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4348 if (this_cu
->is_debug_types
)
4351 cu_offset type_offset_in_tu
;
4353 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4354 abbrev_section
, info_ptr
,
4356 &type_offset_in_tu
);
4358 /* Since per_cu is the first member of struct signatured_type,
4359 we can go from a pointer to one to a pointer to the other. */
4360 sig_type
= (struct signatured_type
*) this_cu
;
4361 gdb_assert (sig_type
->signature
== signature
);
4362 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4363 == type_offset_in_tu
.cu_off
);
4364 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4366 /* LENGTH has not been set yet for type units if we're
4367 using .gdb_index. */
4368 this_cu
->length
= get_cu_length (&cu
->header
);
4370 /* Establish the type offset that can be used to lookup the type. */
4371 sig_type
->type_offset_in_section
.sect_off
=
4372 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4376 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4380 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4381 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4385 /* Skip dummy compilation units. */
4386 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4387 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4389 do_cleanups (cleanups
);
4393 /* If we don't have them yet, read the abbrevs for this compilation unit.
4394 And if we need to read them now, make sure they're freed when we're
4395 done. Note that it's important that if the CU had an abbrev table
4396 on entry we don't free it when we're done: Somewhere up the call stack
4397 it may be in use. */
4398 if (abbrev_table
!= NULL
)
4400 gdb_assert (cu
->abbrev_table
== NULL
);
4401 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4402 == abbrev_table
->offset
.sect_off
);
4403 cu
->abbrev_table
= abbrev_table
;
4405 else if (cu
->abbrev_table
== NULL
)
4407 dwarf2_read_abbrevs (cu
, abbrev_section
);
4408 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4410 else if (rereading_dwo_cu
)
4412 dwarf2_free_abbrev_table (cu
);
4413 dwarf2_read_abbrevs (cu
, abbrev_section
);
4416 /* Read the top level CU/TU die. */
4417 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4418 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4420 /* If we have a DWO stub, process it and then read in the DWO file.
4421 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4422 a DWO CU, that this test will fail. */
4423 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4426 char *dwo_name
= DW_STRING (attr
);
4427 const char *comp_dir_string
;
4428 struct dwo_unit
*dwo_unit
;
4429 ULONGEST signature
; /* Or dwo_id. */
4430 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4431 int i
,num_extra_attrs
;
4432 struct dwarf2_section_info
*dwo_abbrev_section
;
4435 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4436 " has children (offset 0x%x) [in module %s]"),
4437 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4439 /* These attributes aren't processed until later:
4440 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4441 However, the attribute is found in the stub which we won't have later.
4442 In order to not impose this complication on the rest of the code,
4443 we read them here and copy them to the DWO CU/TU die. */
4445 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4448 if (! this_cu
->is_debug_types
)
4449 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4450 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4451 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4452 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4453 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4455 /* There should be a DW_AT_addr_base attribute here (if needed).
4456 We need the value before we can process DW_FORM_GNU_addr_index. */
4458 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4460 cu
->addr_base
= DW_UNSND (attr
);
4462 /* There should be a DW_AT_ranges_base attribute here (if needed).
4463 We need the value before we can process DW_AT_ranges. */
4464 cu
->ranges_base
= 0;
4465 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4467 cu
->ranges_base
= DW_UNSND (attr
);
4469 if (this_cu
->is_debug_types
)
4471 gdb_assert (sig_type
!= NULL
);
4472 signature
= sig_type
->signature
;
4476 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4478 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4480 signature
= DW_UNSND (attr
);
4483 /* We may need the comp_dir in order to find the DWO file. */
4484 comp_dir_string
= NULL
;
4486 comp_dir_string
= DW_STRING (comp_dir
);
4488 if (this_cu
->is_debug_types
)
4489 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4491 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4494 if (dwo_unit
== NULL
)
4496 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4497 " with ID %s [in module %s]"),
4498 this_cu
->offset
.sect_off
,
4499 phex (signature
, sizeof (signature
)),
4503 /* Set up for reading the DWO CU/TU. */
4504 cu
->dwo_unit
= dwo_unit
;
4505 section
= dwo_unit
->info_or_types_section
;
4506 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4507 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4508 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4510 if (this_cu
->is_debug_types
)
4514 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4518 gdb_assert (sig_type
->signature
== signature
);
4519 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4520 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4522 /* Establish the type offset that can be used to lookup the type.
4523 For DWO files, we don't know it until now. */
4524 sig_type
->type_offset_in_section
.sect_off
=
4525 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4529 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4532 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4533 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4536 /* Discard the original CU's abbrev table, and read the DWO's. */
4537 if (abbrev_table
== NULL
)
4539 dwarf2_free_abbrev_table (cu
);
4540 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4544 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4545 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4548 /* Read in the die, but leave space to copy over the attributes
4549 from the stub. This has the benefit of simplifying the rest of
4550 the code - all the real work is done here. */
4551 num_extra_attrs
= ((stmt_list
!= NULL
)
4555 + (comp_dir
!= NULL
));
4556 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4557 &has_children
, num_extra_attrs
);
4559 /* Copy over the attributes from the stub to the DWO die. */
4560 i
= comp_unit_die
->num_attrs
;
4561 if (stmt_list
!= NULL
)
4562 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4564 comp_unit_die
->attrs
[i
++] = *low_pc
;
4565 if (high_pc
!= NULL
)
4566 comp_unit_die
->attrs
[i
++] = *high_pc
;
4568 comp_unit_die
->attrs
[i
++] = *ranges
;
4569 if (comp_dir
!= NULL
)
4570 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4571 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4573 /* Skip dummy compilation units. */
4574 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4575 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4577 do_cleanups (cleanups
);
4582 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4584 if (free_cu_cleanup
!= NULL
)
4588 /* We've successfully allocated this compilation unit. Let our
4589 caller clean it up when finished with it. */
4590 discard_cleanups (free_cu_cleanup
);
4592 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4593 So we have to manually free the abbrev table. */
4594 dwarf2_free_abbrev_table (cu
);
4596 /* Link this CU into read_in_chain. */
4597 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4598 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4601 do_cleanups (free_cu_cleanup
);
4604 do_cleanups (cleanups
);
4607 /* Read CU/TU THIS_CU in section SECTION,
4608 but do not follow DW_AT_GNU_dwo_name if present.
4609 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
4610 have already done the lookup to find the DWO file).
4612 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4613 THIS_CU->is_debug_types, but nothing else.
4615 We fill in THIS_CU->length.
4617 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4618 linker) then DIE_READER_FUNC will not get called.
4620 THIS_CU->cu is always freed when done.
4621 This is done in order to not leave THIS_CU->cu in a state where we have
4622 to care whether it refers to the "main" CU or the DWO CU. */
4625 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4626 struct dwarf2_section_info
*abbrev_section
,
4627 struct dwo_file
*dwo_file
,
4628 die_reader_func_ftype
*die_reader_func
,
4631 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4632 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4633 bfd
*abfd
= section
->asection
->owner
;
4634 struct dwarf2_cu cu
;
4635 gdb_byte
*begin_info_ptr
, *info_ptr
;
4636 struct die_reader_specs reader
;
4637 struct cleanup
*cleanups
;
4638 struct die_info
*comp_unit_die
;
4641 if (dwarf2_die_debug
)
4642 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4643 this_cu
->is_debug_types
? "type" : "comp",
4644 this_cu
->offset
.sect_off
);
4646 gdb_assert (this_cu
->cu
== NULL
);
4648 /* This is cheap if the section is already read in. */
4649 dwarf2_read_section (objfile
, section
);
4651 init_one_comp_unit (&cu
, this_cu
);
4653 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4655 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4656 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4657 abbrev_section
, info_ptr
,
4658 this_cu
->is_debug_types
);
4660 this_cu
->length
= get_cu_length (&cu
.header
);
4662 /* Skip dummy compilation units. */
4663 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4664 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4666 do_cleanups (cleanups
);
4670 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4671 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4673 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4674 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4676 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4678 do_cleanups (cleanups
);
4681 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4682 does not lookup the specified DWO file.
4683 This cannot be used to read DWO files.
4685 THIS_CU->cu is always freed when done.
4686 This is done in order to not leave THIS_CU->cu in a state where we have
4687 to care whether it refers to the "main" CU or the DWO CU.
4688 We can revisit this if the data shows there's a performance issue. */
4691 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4692 die_reader_func_ftype
*die_reader_func
,
4695 init_cutu_and_read_dies_no_follow (this_cu
,
4696 get_abbrev_section_for_cu (this_cu
),
4698 die_reader_func
, data
);
4701 /* Create a psymtab named NAME and assign it to PER_CU.
4703 The caller must fill in the following details:
4704 dirname, textlow, texthigh. */
4706 static struct partial_symtab
*
4707 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4709 struct objfile
*objfile
= per_cu
->objfile
;
4710 struct partial_symtab
*pst
;
4712 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4714 objfile
->global_psymbols
.next
,
4715 objfile
->static_psymbols
.next
);
4717 pst
->psymtabs_addrmap_supported
= 1;
4719 /* This is the glue that links PST into GDB's symbol API. */
4720 pst
->read_symtab_private
= per_cu
;
4721 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4722 per_cu
->v
.psymtab
= pst
;
4727 /* die_reader_func for process_psymtab_comp_unit. */
4730 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4732 struct die_info
*comp_unit_die
,
4736 struct dwarf2_cu
*cu
= reader
->cu
;
4737 struct objfile
*objfile
= cu
->objfile
;
4738 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4739 struct attribute
*attr
;
4741 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4742 struct partial_symtab
*pst
;
4744 const char *filename
;
4745 int *want_partial_unit_ptr
= data
;
4747 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4748 && (want_partial_unit_ptr
== NULL
4749 || !*want_partial_unit_ptr
))
4752 gdb_assert (! per_cu
->is_debug_types
);
4754 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4756 cu
->list_in_scope
= &file_symbols
;
4758 /* Allocate a new partial symbol table structure. */
4759 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4760 if (attr
== NULL
|| !DW_STRING (attr
))
4763 filename
= DW_STRING (attr
);
4765 pst
= create_partial_symtab (per_cu
, filename
);
4767 /* This must be done before calling dwarf2_build_include_psymtabs. */
4768 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4770 pst
->dirname
= DW_STRING (attr
);
4772 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4774 dwarf2_find_base_address (comp_unit_die
, cu
);
4776 /* Possibly set the default values of LOWPC and HIGHPC from
4778 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4779 &best_highpc
, cu
, pst
);
4780 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4781 /* Store the contiguous range if it is not empty; it can be empty for
4782 CUs with no code. */
4783 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4784 best_lowpc
+ baseaddr
,
4785 best_highpc
+ baseaddr
- 1, pst
);
4787 /* Check if comp unit has_children.
4788 If so, read the rest of the partial symbols from this comp unit.
4789 If not, there's no more debug_info for this comp unit. */
4792 struct partial_die_info
*first_die
;
4793 CORE_ADDR lowpc
, highpc
;
4795 lowpc
= ((CORE_ADDR
) -1);
4796 highpc
= ((CORE_ADDR
) 0);
4798 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4800 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4803 /* If we didn't find a lowpc, set it to highpc to avoid
4804 complaints from `maint check'. */
4805 if (lowpc
== ((CORE_ADDR
) -1))
4808 /* If the compilation unit didn't have an explicit address range,
4809 then use the information extracted from its child dies. */
4813 best_highpc
= highpc
;
4816 pst
->textlow
= best_lowpc
+ baseaddr
;
4817 pst
->texthigh
= best_highpc
+ baseaddr
;
4819 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4820 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4821 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4822 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4823 sort_pst_symbols (pst
);
4825 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
))
4828 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4829 struct dwarf2_per_cu_data
*iter
;
4831 /* Fill in 'dependencies' here; we fill in 'users' in a
4833 pst
->number_of_dependencies
= len
;
4834 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4835 len
* sizeof (struct symtab
*));
4837 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
4840 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4842 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4845 /* Get the list of files included in the current compilation unit,
4846 and build a psymtab for each of them. */
4847 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4849 if (dwarf2_read_debug
)
4851 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4853 fprintf_unfiltered (gdb_stdlog
,
4854 "Psymtab for %s unit @0x%x: 0x%s - 0x%s"
4855 ", %d global, %d static syms\n",
4856 per_cu
->is_debug_types
? "type" : "comp",
4857 per_cu
->offset
.sect_off
,
4858 paddress (gdbarch
, pst
->textlow
),
4859 paddress (gdbarch
, pst
->texthigh
),
4860 pst
->n_global_syms
, pst
->n_static_syms
);
4864 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4865 Process compilation unit THIS_CU for a psymtab. */
4868 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4869 int want_partial_unit
)
4871 /* If this compilation unit was already read in, free the
4872 cached copy in order to read it in again. This is
4873 necessary because we skipped some symbols when we first
4874 read in the compilation unit (see load_partial_dies).
4875 This problem could be avoided, but the benefit is unclear. */
4876 if (this_cu
->cu
!= NULL
)
4877 free_one_cached_comp_unit (this_cu
);
4879 gdb_assert (! this_cu
->is_debug_types
);
4880 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
4881 process_psymtab_comp_unit_reader
,
4882 &want_partial_unit
);
4884 /* Age out any secondary CUs. */
4885 age_cached_comp_units ();
4889 hash_type_unit_group (const void *item
)
4891 const struct type_unit_group
*tu_group
= item
;
4893 return hash_stmt_list_entry (&tu_group
->hash
);
4897 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
4899 const struct type_unit_group
*lhs
= item_lhs
;
4900 const struct type_unit_group
*rhs
= item_rhs
;
4902 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
4905 /* Allocate a hash table for type unit groups. */
4908 allocate_type_unit_groups_table (void)
4910 return htab_create_alloc_ex (3,
4911 hash_type_unit_group
,
4914 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
4915 hashtab_obstack_allocate
,
4916 dummy_obstack_deallocate
);
4919 /* Type units that don't have DW_AT_stmt_list are grouped into their own
4920 partial symtabs. We combine several TUs per psymtab to not let the size
4921 of any one psymtab grow too big. */
4922 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
4923 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
4925 /* Helper routine for get_type_unit_group.
4926 Create the type_unit_group object used to hold one or more TUs. */
4928 static struct type_unit_group
*
4929 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
4931 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4932 struct dwarf2_per_cu_data
*per_cu
;
4933 struct type_unit_group
*tu_group
;
4935 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4936 struct type_unit_group
);
4937 per_cu
= &tu_group
->per_cu
;
4938 per_cu
->objfile
= objfile
;
4939 per_cu
->is_debug_types
= 1;
4940 per_cu
->s
.type_unit_group
= tu_group
;
4942 if (dwarf2_per_objfile
->using_index
)
4944 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4945 struct dwarf2_per_cu_quick_data
);
4946 tu_group
->t
.first_tu
= cu
->per_cu
;
4950 unsigned int line_offset
= line_offset_struct
.sect_off
;
4951 struct partial_symtab
*pst
;
4954 /* Give the symtab a useful name for debug purposes. */
4955 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
4956 name
= xstrprintf ("<type_units_%d>",
4957 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
4959 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
4961 pst
= create_partial_symtab (per_cu
, name
);
4967 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
4968 tu_group
->hash
.line_offset
= line_offset_struct
;
4973 /* Look up the type_unit_group for type unit CU, and create it if necessary.
4974 STMT_LIST is a DW_AT_stmt_list attribute. */
4976 static struct type_unit_group
*
4977 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
4979 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
4980 struct type_unit_group
*tu_group
;
4982 unsigned int line_offset
;
4983 struct type_unit_group type_unit_group_for_lookup
;
4985 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
4987 dwarf2_per_objfile
->type_unit_groups
=
4988 allocate_type_unit_groups_table ();
4991 /* Do we need to create a new group, or can we use an existing one? */
4995 line_offset
= DW_UNSND (stmt_list
);
4996 ++tu_stats
->nr_symtab_sharers
;
5000 /* Ugh, no stmt_list. Rare, but we have to handle it.
5001 We can do various things here like create one group per TU or
5002 spread them over multiple groups to split up the expansion work.
5003 To avoid worst case scenarios (too many groups or too large groups)
5004 we, umm, group them in bunches. */
5005 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5006 | (tu_stats
->nr_stmt_less_type_units
5007 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5008 ++tu_stats
->nr_stmt_less_type_units
;
5011 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5012 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5013 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5014 &type_unit_group_for_lookup
, INSERT
);
5018 gdb_assert (tu_group
!= NULL
);
5022 sect_offset line_offset_struct
;
5024 line_offset_struct
.sect_off
= line_offset
;
5025 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5027 ++tu_stats
->nr_symtabs
;
5033 /* Struct used to sort TUs by their abbreviation table offset. */
5035 struct tu_abbrev_offset
5037 struct signatured_type
*sig_type
;
5038 sect_offset abbrev_offset
;
5041 /* Helper routine for build_type_unit_groups, passed to qsort. */
5044 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5046 const struct tu_abbrev_offset
* const *a
= ap
;
5047 const struct tu_abbrev_offset
* const *b
= bp
;
5048 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5049 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5051 return (aoff
> boff
) - (aoff
< boff
);
5054 /* A helper function to add a type_unit_group to a table. */
5057 add_type_unit_group_to_table (void **slot
, void *datum
)
5059 struct type_unit_group
*tu_group
= *slot
;
5060 struct type_unit_group
***datap
= datum
;
5068 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5069 each one passing FUNC,DATA.
5071 The efficiency is because we sort TUs by the abbrev table they use and
5072 only read each abbrev table once. In one program there are 200K TUs
5073 sharing 8K abbrev tables.
5075 The main purpose of this function is to support building the
5076 dwarf2_per_objfile->type_unit_groups table.
5077 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5078 can collapse the search space by grouping them by stmt_list.
5079 The savings can be significant, in the same program from above the 200K TUs
5080 share 8K stmt_list tables.
5082 FUNC is expected to call get_type_unit_group, which will create the
5083 struct type_unit_group if necessary and add it to
5084 dwarf2_per_objfile->type_unit_groups. */
5087 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5089 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5090 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5091 struct cleanup
*cleanups
;
5092 struct abbrev_table
*abbrev_table
;
5093 sect_offset abbrev_offset
;
5094 struct tu_abbrev_offset
*sorted_by_abbrev
;
5095 struct type_unit_group
**iter
;
5098 /* It's up to the caller to not call us multiple times. */
5099 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5101 if (dwarf2_per_objfile
->n_type_units
== 0)
5104 /* TUs typically share abbrev tables, and there can be way more TUs than
5105 abbrev tables. Sort by abbrev table to reduce the number of times we
5106 read each abbrev table in.
5107 Alternatives are to punt or to maintain a cache of abbrev tables.
5108 This is simpler and efficient enough for now.
5110 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5111 symtab to use). Typically TUs with the same abbrev offset have the same
5112 stmt_list value too so in practice this should work well.
5114 The basic algorithm here is:
5116 sort TUs by abbrev table
5117 for each TU with same abbrev table:
5118 read abbrev table if first user
5119 read TU top level DIE
5120 [IWBN if DWO skeletons had DW_AT_stmt_list]
5123 if (dwarf2_read_debug
)
5124 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5126 /* Sort in a separate table to maintain the order of all_type_units
5127 for .gdb_index: TU indices directly index all_type_units. */
5128 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5129 dwarf2_per_objfile
->n_type_units
);
5130 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5132 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5134 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5135 sorted_by_abbrev
[i
].abbrev_offset
=
5136 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5137 sig_type
->per_cu
.offset
);
5139 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5140 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5141 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5143 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5144 called any number of times, so we don't reset tu_stats here. */
5146 abbrev_offset
.sect_off
= ~(unsigned) 0;
5147 abbrev_table
= NULL
;
5148 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5150 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5152 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5154 /* Switch to the next abbrev table if necessary. */
5155 if (abbrev_table
== NULL
5156 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5158 if (abbrev_table
!= NULL
)
5160 abbrev_table_free (abbrev_table
);
5161 /* Reset to NULL in case abbrev_table_read_table throws
5162 an error: abbrev_table_free_cleanup will get called. */
5163 abbrev_table
= NULL
;
5165 abbrev_offset
= tu
->abbrev_offset
;
5167 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5169 ++tu_stats
->nr_uniq_abbrev_tables
;
5172 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5176 /* Create a vector of pointers to primary type units to make it easy to
5177 iterate over them and CUs. See dw2_get_primary_cu. */
5178 dwarf2_per_objfile
->n_type_unit_groups
=
5179 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5180 dwarf2_per_objfile
->all_type_unit_groups
=
5181 obstack_alloc (&objfile
->objfile_obstack
,
5182 dwarf2_per_objfile
->n_type_unit_groups
5183 * sizeof (struct type_unit_group
*));
5184 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5185 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5186 add_type_unit_group_to_table
, &iter
);
5187 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5188 == dwarf2_per_objfile
->n_type_unit_groups
);
5190 do_cleanups (cleanups
);
5192 if (dwarf2_read_debug
)
5194 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5195 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5196 dwarf2_per_objfile
->n_type_units
);
5197 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5198 tu_stats
->nr_uniq_abbrev_tables
);
5199 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5200 tu_stats
->nr_symtabs
);
5201 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5202 tu_stats
->nr_symtab_sharers
);
5203 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5204 tu_stats
->nr_stmt_less_type_units
);
5208 /* Reader function for build_type_psymtabs. */
5211 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5213 struct die_info
*type_unit_die
,
5217 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5218 struct dwarf2_cu
*cu
= reader
->cu
;
5219 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5220 struct type_unit_group
*tu_group
;
5221 struct attribute
*attr
;
5222 struct partial_die_info
*first_die
;
5223 CORE_ADDR lowpc
, highpc
;
5224 struct partial_symtab
*pst
;
5226 gdb_assert (data
== NULL
);
5231 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5232 tu_group
= get_type_unit_group (cu
, attr
);
5234 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5236 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5237 cu
->list_in_scope
= &file_symbols
;
5238 pst
= create_partial_symtab (per_cu
, "");
5241 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5243 lowpc
= (CORE_ADDR
) -1;
5244 highpc
= (CORE_ADDR
) 0;
5245 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5247 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5248 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5249 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5250 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5251 sort_pst_symbols (pst
);
5254 /* Traversal function for build_type_psymtabs. */
5257 build_type_psymtab_dependencies (void **slot
, void *info
)
5259 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5260 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5261 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5262 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5263 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5264 struct dwarf2_per_cu_data
*iter
;
5267 gdb_assert (len
> 0);
5269 pst
->number_of_dependencies
= len
;
5270 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5271 len
* sizeof (struct psymtab
*));
5273 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5276 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5277 iter
->s
.type_unit_group
= tu_group
;
5280 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5285 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5286 Build partial symbol tables for the .debug_types comp-units. */
5289 build_type_psymtabs (struct objfile
*objfile
)
5291 if (! create_all_type_units (objfile
))
5294 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5296 /* Now that all TUs have been processed we can fill in the dependencies. */
5297 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5298 build_type_psymtab_dependencies
, NULL
);
5301 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5304 psymtabs_addrmap_cleanup (void *o
)
5306 struct objfile
*objfile
= o
;
5308 objfile
->psymtabs_addrmap
= NULL
;
5311 /* Compute the 'user' field for each psymtab in OBJFILE. */
5314 set_partial_user (struct objfile
*objfile
)
5318 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5320 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5321 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5327 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5329 /* Set the 'user' field only if it is not already set. */
5330 if (pst
->dependencies
[j
]->user
== NULL
)
5331 pst
->dependencies
[j
]->user
= pst
;
5336 /* Build the partial symbol table by doing a quick pass through the
5337 .debug_info and .debug_abbrev sections. */
5340 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5342 struct cleanup
*back_to
, *addrmap_cleanup
;
5343 struct obstack temp_obstack
;
5346 if (dwarf2_read_debug
)
5348 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5352 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5354 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5356 /* Any cached compilation units will be linked by the per-objfile
5357 read_in_chain. Make sure to free them when we're done. */
5358 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5360 build_type_psymtabs (objfile
);
5362 create_all_comp_units (objfile
);
5364 /* Create a temporary address map on a temporary obstack. We later
5365 copy this to the final obstack. */
5366 obstack_init (&temp_obstack
);
5367 make_cleanup_obstack_free (&temp_obstack
);
5368 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5369 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5371 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5373 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5375 process_psymtab_comp_unit (per_cu
, 0);
5378 set_partial_user (objfile
);
5380 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5381 &objfile
->objfile_obstack
);
5382 discard_cleanups (addrmap_cleanup
);
5384 do_cleanups (back_to
);
5386 if (dwarf2_read_debug
)
5387 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5391 /* die_reader_func for load_partial_comp_unit. */
5394 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5396 struct die_info
*comp_unit_die
,
5400 struct dwarf2_cu
*cu
= reader
->cu
;
5402 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5404 /* Check if comp unit has_children.
5405 If so, read the rest of the partial symbols from this comp unit.
5406 If not, there's no more debug_info for this comp unit. */
5408 load_partial_dies (reader
, info_ptr
, 0);
5411 /* Load the partial DIEs for a secondary CU into memory.
5412 This is also used when rereading a primary CU with load_all_dies. */
5415 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5417 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5418 load_partial_comp_unit_reader
, NULL
);
5422 read_comp_units_from_section (struct objfile
*objfile
,
5423 struct dwarf2_section_info
*section
,
5424 unsigned int is_dwz
,
5427 struct dwarf2_per_cu_data
***all_comp_units
)
5430 bfd
*abfd
= section
->asection
->owner
;
5432 dwarf2_read_section (objfile
, section
);
5434 info_ptr
= section
->buffer
;
5436 while (info_ptr
< section
->buffer
+ section
->size
)
5438 unsigned int length
, initial_length_size
;
5439 struct dwarf2_per_cu_data
*this_cu
;
5442 offset
.sect_off
= info_ptr
- section
->buffer
;
5444 /* Read just enough information to find out where the next
5445 compilation unit is. */
5446 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5448 /* Save the compilation unit for later lookup. */
5449 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5450 sizeof (struct dwarf2_per_cu_data
));
5451 memset (this_cu
, 0, sizeof (*this_cu
));
5452 this_cu
->offset
= offset
;
5453 this_cu
->length
= length
+ initial_length_size
;
5454 this_cu
->is_dwz
= is_dwz
;
5455 this_cu
->objfile
= objfile
;
5456 this_cu
->info_or_types_section
= section
;
5458 if (*n_comp_units
== *n_allocated
)
5461 *all_comp_units
= xrealloc (*all_comp_units
,
5463 * sizeof (struct dwarf2_per_cu_data
*));
5465 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5468 info_ptr
= info_ptr
+ this_cu
->length
;
5472 /* Create a list of all compilation units in OBJFILE.
5473 This is only done for -readnow and building partial symtabs. */
5476 create_all_comp_units (struct objfile
*objfile
)
5480 struct dwarf2_per_cu_data
**all_comp_units
;
5484 all_comp_units
= xmalloc (n_allocated
5485 * sizeof (struct dwarf2_per_cu_data
*));
5487 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5488 &n_allocated
, &n_comp_units
, &all_comp_units
);
5490 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5492 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5494 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5495 &n_allocated
, &n_comp_units
,
5499 dwarf2_per_objfile
->all_comp_units
5500 = obstack_alloc (&objfile
->objfile_obstack
,
5501 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5502 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5503 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5504 xfree (all_comp_units
);
5505 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5508 /* Process all loaded DIEs for compilation unit CU, starting at
5509 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5510 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5511 DW_AT_ranges). If NEED_PC is set, then this function will set
5512 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5513 and record the covered ranges in the addrmap. */
5516 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5517 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5519 struct partial_die_info
*pdi
;
5521 /* Now, march along the PDI's, descending into ones which have
5522 interesting children but skipping the children of the other ones,
5523 until we reach the end of the compilation unit. */
5529 fixup_partial_die (pdi
, cu
);
5531 /* Anonymous namespaces or modules have no name but have interesting
5532 children, so we need to look at them. Ditto for anonymous
5535 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5536 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5537 || pdi
->tag
== DW_TAG_imported_unit
)
5541 case DW_TAG_subprogram
:
5542 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5544 case DW_TAG_constant
:
5545 case DW_TAG_variable
:
5546 case DW_TAG_typedef
:
5547 case DW_TAG_union_type
:
5548 if (!pdi
->is_declaration
)
5550 add_partial_symbol (pdi
, cu
);
5553 case DW_TAG_class_type
:
5554 case DW_TAG_interface_type
:
5555 case DW_TAG_structure_type
:
5556 if (!pdi
->is_declaration
)
5558 add_partial_symbol (pdi
, cu
);
5561 case DW_TAG_enumeration_type
:
5562 if (!pdi
->is_declaration
)
5563 add_partial_enumeration (pdi
, cu
);
5565 case DW_TAG_base_type
:
5566 case DW_TAG_subrange_type
:
5567 /* File scope base type definitions are added to the partial
5569 add_partial_symbol (pdi
, cu
);
5571 case DW_TAG_namespace
:
5572 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5575 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5577 case DW_TAG_imported_unit
:
5579 struct dwarf2_per_cu_data
*per_cu
;
5581 /* For now we don't handle imported units in type units. */
5582 if (cu
->per_cu
->is_debug_types
)
5584 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5585 " supported in type units [in module %s]"),
5589 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5593 /* Go read the partial unit, if needed. */
5594 if (per_cu
->v
.psymtab
== NULL
)
5595 process_psymtab_comp_unit (per_cu
, 1);
5597 VEC_safe_push (dwarf2_per_cu_ptr
,
5598 cu
->per_cu
->s
.imported_symtabs
, per_cu
);
5606 /* If the die has a sibling, skip to the sibling. */
5608 pdi
= pdi
->die_sibling
;
5612 /* Functions used to compute the fully scoped name of a partial DIE.
5614 Normally, this is simple. For C++, the parent DIE's fully scoped
5615 name is concatenated with "::" and the partial DIE's name. For
5616 Java, the same thing occurs except that "." is used instead of "::".
5617 Enumerators are an exception; they use the scope of their parent
5618 enumeration type, i.e. the name of the enumeration type is not
5619 prepended to the enumerator.
5621 There are two complexities. One is DW_AT_specification; in this
5622 case "parent" means the parent of the target of the specification,
5623 instead of the direct parent of the DIE. The other is compilers
5624 which do not emit DW_TAG_namespace; in this case we try to guess
5625 the fully qualified name of structure types from their members'
5626 linkage names. This must be done using the DIE's children rather
5627 than the children of any DW_AT_specification target. We only need
5628 to do this for structures at the top level, i.e. if the target of
5629 any DW_AT_specification (if any; otherwise the DIE itself) does not
5632 /* Compute the scope prefix associated with PDI's parent, in
5633 compilation unit CU. The result will be allocated on CU's
5634 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5635 field. NULL is returned if no prefix is necessary. */
5637 partial_die_parent_scope (struct partial_die_info
*pdi
,
5638 struct dwarf2_cu
*cu
)
5640 char *grandparent_scope
;
5641 struct partial_die_info
*parent
, *real_pdi
;
5643 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5644 then this means the parent of the specification DIE. */
5647 while (real_pdi
->has_specification
)
5648 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5649 real_pdi
->spec_is_dwz
, cu
);
5651 parent
= real_pdi
->die_parent
;
5655 if (parent
->scope_set
)
5656 return parent
->scope
;
5658 fixup_partial_die (parent
, cu
);
5660 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5662 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5663 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5664 Work around this problem here. */
5665 if (cu
->language
== language_cplus
5666 && parent
->tag
== DW_TAG_namespace
5667 && strcmp (parent
->name
, "::") == 0
5668 && grandparent_scope
== NULL
)
5670 parent
->scope
= NULL
;
5671 parent
->scope_set
= 1;
5675 if (pdi
->tag
== DW_TAG_enumerator
)
5676 /* Enumerators should not get the name of the enumeration as a prefix. */
5677 parent
->scope
= grandparent_scope
;
5678 else if (parent
->tag
== DW_TAG_namespace
5679 || parent
->tag
== DW_TAG_module
5680 || parent
->tag
== DW_TAG_structure_type
5681 || parent
->tag
== DW_TAG_class_type
5682 || parent
->tag
== DW_TAG_interface_type
5683 || parent
->tag
== DW_TAG_union_type
5684 || parent
->tag
== DW_TAG_enumeration_type
)
5686 if (grandparent_scope
== NULL
)
5687 parent
->scope
= parent
->name
;
5689 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5691 parent
->name
, 0, cu
);
5695 /* FIXME drow/2004-04-01: What should we be doing with
5696 function-local names? For partial symbols, we should probably be
5698 complaint (&symfile_complaints
,
5699 _("unhandled containing DIE tag %d for DIE at %d"),
5700 parent
->tag
, pdi
->offset
.sect_off
);
5701 parent
->scope
= grandparent_scope
;
5704 parent
->scope_set
= 1;
5705 return parent
->scope
;
5708 /* Return the fully scoped name associated with PDI, from compilation unit
5709 CU. The result will be allocated with malloc. */
5712 partial_die_full_name (struct partial_die_info
*pdi
,
5713 struct dwarf2_cu
*cu
)
5717 /* If this is a template instantiation, we can not work out the
5718 template arguments from partial DIEs. So, unfortunately, we have
5719 to go through the full DIEs. At least any work we do building
5720 types here will be reused if full symbols are loaded later. */
5721 if (pdi
->has_template_arguments
)
5723 fixup_partial_die (pdi
, cu
);
5725 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5727 struct die_info
*die
;
5728 struct attribute attr
;
5729 struct dwarf2_cu
*ref_cu
= cu
;
5731 /* DW_FORM_ref_addr is using section offset. */
5733 attr
.form
= DW_FORM_ref_addr
;
5734 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5735 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5737 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5741 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5742 if (parent_scope
== NULL
)
5745 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5749 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5751 struct objfile
*objfile
= cu
->objfile
;
5753 char *actual_name
= NULL
;
5755 int built_actual_name
= 0;
5757 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5759 actual_name
= partial_die_full_name (pdi
, cu
);
5761 built_actual_name
= 1;
5763 if (actual_name
== NULL
)
5764 actual_name
= pdi
->name
;
5768 case DW_TAG_subprogram
:
5769 if (pdi
->is_external
|| cu
->language
== language_ada
)
5771 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5772 of the global scope. But in Ada, we want to be able to access
5773 nested procedures globally. So all Ada subprograms are stored
5774 in the global scope. */
5775 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5776 mst_text, objfile); */
5777 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5779 VAR_DOMAIN
, LOC_BLOCK
,
5780 &objfile
->global_psymbols
,
5781 0, pdi
->lowpc
+ baseaddr
,
5782 cu
->language
, objfile
);
5786 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5787 mst_file_text, objfile); */
5788 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5790 VAR_DOMAIN
, LOC_BLOCK
,
5791 &objfile
->static_psymbols
,
5792 0, pdi
->lowpc
+ baseaddr
,
5793 cu
->language
, objfile
);
5796 case DW_TAG_constant
:
5798 struct psymbol_allocation_list
*list
;
5800 if (pdi
->is_external
)
5801 list
= &objfile
->global_psymbols
;
5803 list
= &objfile
->static_psymbols
;
5804 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5805 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
5806 list
, 0, 0, cu
->language
, objfile
);
5809 case DW_TAG_variable
:
5811 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5815 && !dwarf2_per_objfile
->has_section_at_zero
)
5817 /* A global or static variable may also have been stripped
5818 out by the linker if unused, in which case its address
5819 will be nullified; do not add such variables into partial
5820 symbol table then. */
5822 else if (pdi
->is_external
)
5825 Don't enter into the minimal symbol tables as there is
5826 a minimal symbol table entry from the ELF symbols already.
5827 Enter into partial symbol table if it has a location
5828 descriptor or a type.
5829 If the location descriptor is missing, new_symbol will create
5830 a LOC_UNRESOLVED symbol, the address of the variable will then
5831 be determined from the minimal symbol table whenever the variable
5833 The address for the partial symbol table entry is not
5834 used by GDB, but it comes in handy for debugging partial symbol
5837 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5838 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5840 VAR_DOMAIN
, LOC_STATIC
,
5841 &objfile
->global_psymbols
,
5843 cu
->language
, objfile
);
5847 /* Static Variable. Skip symbols without location descriptors. */
5848 if (pdi
->d
.locdesc
== NULL
)
5850 if (built_actual_name
)
5851 xfree (actual_name
);
5854 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5855 mst_file_data, objfile); */
5856 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5858 VAR_DOMAIN
, LOC_STATIC
,
5859 &objfile
->static_psymbols
,
5861 cu
->language
, objfile
);
5864 case DW_TAG_typedef
:
5865 case DW_TAG_base_type
:
5866 case DW_TAG_subrange_type
:
5867 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5869 VAR_DOMAIN
, LOC_TYPEDEF
,
5870 &objfile
->static_psymbols
,
5871 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5873 case DW_TAG_namespace
:
5874 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5876 VAR_DOMAIN
, LOC_TYPEDEF
,
5877 &objfile
->global_psymbols
,
5878 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5880 case DW_TAG_class_type
:
5881 case DW_TAG_interface_type
:
5882 case DW_TAG_structure_type
:
5883 case DW_TAG_union_type
:
5884 case DW_TAG_enumeration_type
:
5885 /* Skip external references. The DWARF standard says in the section
5886 about "Structure, Union, and Class Type Entries": "An incomplete
5887 structure, union or class type is represented by a structure,
5888 union or class entry that does not have a byte size attribute
5889 and that has a DW_AT_declaration attribute." */
5890 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
5892 if (built_actual_name
)
5893 xfree (actual_name
);
5897 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
5898 static vs. global. */
5899 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5901 STRUCT_DOMAIN
, LOC_TYPEDEF
,
5902 (cu
->language
== language_cplus
5903 || cu
->language
== language_java
)
5904 ? &objfile
->global_psymbols
5905 : &objfile
->static_psymbols
,
5906 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5909 case DW_TAG_enumerator
:
5910 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5912 VAR_DOMAIN
, LOC_CONST
,
5913 (cu
->language
== language_cplus
5914 || cu
->language
== language_java
)
5915 ? &objfile
->global_psymbols
5916 : &objfile
->static_psymbols
,
5917 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5923 if (built_actual_name
)
5924 xfree (actual_name
);
5927 /* Read a partial die corresponding to a namespace; also, add a symbol
5928 corresponding to that namespace to the symbol table. NAMESPACE is
5929 the name of the enclosing namespace. */
5932 add_partial_namespace (struct partial_die_info
*pdi
,
5933 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5934 int need_pc
, struct dwarf2_cu
*cu
)
5936 /* Add a symbol for the namespace. */
5938 add_partial_symbol (pdi
, cu
);
5940 /* Now scan partial symbols in that namespace. */
5942 if (pdi
->has_children
)
5943 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5946 /* Read a partial die corresponding to a Fortran module. */
5949 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
5950 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5952 /* Now scan partial symbols in that module. */
5954 if (pdi
->has_children
)
5955 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5958 /* Read a partial die corresponding to a subprogram and create a partial
5959 symbol for that subprogram. When the CU language allows it, this
5960 routine also defines a partial symbol for each nested subprogram
5961 that this subprogram contains.
5963 DIE my also be a lexical block, in which case we simply search
5964 recursively for suprograms defined inside that lexical block.
5965 Again, this is only performed when the CU language allows this
5966 type of definitions. */
5969 add_partial_subprogram (struct partial_die_info
*pdi
,
5970 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5971 int need_pc
, struct dwarf2_cu
*cu
)
5973 if (pdi
->tag
== DW_TAG_subprogram
)
5975 if (pdi
->has_pc_info
)
5977 if (pdi
->lowpc
< *lowpc
)
5978 *lowpc
= pdi
->lowpc
;
5979 if (pdi
->highpc
> *highpc
)
5980 *highpc
= pdi
->highpc
;
5984 struct objfile
*objfile
= cu
->objfile
;
5986 baseaddr
= ANOFFSET (objfile
->section_offsets
,
5987 SECT_OFF_TEXT (objfile
));
5988 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5989 pdi
->lowpc
+ baseaddr
,
5990 pdi
->highpc
- 1 + baseaddr
,
5991 cu
->per_cu
->v
.psymtab
);
5995 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
5997 if (!pdi
->is_declaration
)
5998 /* Ignore subprogram DIEs that do not have a name, they are
5999 illegal. Do not emit a complaint at this point, we will
6000 do so when we convert this psymtab into a symtab. */
6002 add_partial_symbol (pdi
, cu
);
6006 if (! pdi
->has_children
)
6009 if (cu
->language
== language_ada
)
6011 pdi
= pdi
->die_child
;
6014 fixup_partial_die (pdi
, cu
);
6015 if (pdi
->tag
== DW_TAG_subprogram
6016 || pdi
->tag
== DW_TAG_lexical_block
)
6017 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6018 pdi
= pdi
->die_sibling
;
6023 /* Read a partial die corresponding to an enumeration type. */
6026 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6027 struct dwarf2_cu
*cu
)
6029 struct partial_die_info
*pdi
;
6031 if (enum_pdi
->name
!= NULL
)
6032 add_partial_symbol (enum_pdi
, cu
);
6034 pdi
= enum_pdi
->die_child
;
6037 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6038 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6040 add_partial_symbol (pdi
, cu
);
6041 pdi
= pdi
->die_sibling
;
6045 /* Return the initial uleb128 in the die at INFO_PTR. */
6048 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6050 unsigned int bytes_read
;
6052 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6055 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6056 Return the corresponding abbrev, or NULL if the number is zero (indicating
6057 an empty DIE). In either case *BYTES_READ will be set to the length of
6058 the initial number. */
6060 static struct abbrev_info
*
6061 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6062 struct dwarf2_cu
*cu
)
6064 bfd
*abfd
= cu
->objfile
->obfd
;
6065 unsigned int abbrev_number
;
6066 struct abbrev_info
*abbrev
;
6068 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6070 if (abbrev_number
== 0)
6073 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6076 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6077 abbrev_number
, bfd_get_filename (abfd
));
6083 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6084 Returns a pointer to the end of a series of DIEs, terminated by an empty
6085 DIE. Any children of the skipped DIEs will also be skipped. */
6088 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6090 struct dwarf2_cu
*cu
= reader
->cu
;
6091 struct abbrev_info
*abbrev
;
6092 unsigned int bytes_read
;
6096 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6098 return info_ptr
+ bytes_read
;
6100 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6104 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6105 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6106 abbrev corresponding to that skipped uleb128 should be passed in
6107 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6111 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6112 struct abbrev_info
*abbrev
)
6114 unsigned int bytes_read
;
6115 struct attribute attr
;
6116 bfd
*abfd
= reader
->abfd
;
6117 struct dwarf2_cu
*cu
= reader
->cu
;
6118 gdb_byte
*buffer
= reader
->buffer
;
6119 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6120 gdb_byte
*start_info_ptr
= info_ptr
;
6121 unsigned int form
, i
;
6123 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6125 /* The only abbrev we care about is DW_AT_sibling. */
6126 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6128 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6129 if (attr
.form
== DW_FORM_ref_addr
)
6130 complaint (&symfile_complaints
,
6131 _("ignoring absolute DW_AT_sibling"));
6133 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6136 /* If it isn't DW_AT_sibling, skip this attribute. */
6137 form
= abbrev
->attrs
[i
].form
;
6141 case DW_FORM_ref_addr
:
6142 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6143 and later it is offset sized. */
6144 if (cu
->header
.version
== 2)
6145 info_ptr
+= cu
->header
.addr_size
;
6147 info_ptr
+= cu
->header
.offset_size
;
6149 case DW_FORM_GNU_ref_alt
:
6150 info_ptr
+= cu
->header
.offset_size
;
6153 info_ptr
+= cu
->header
.addr_size
;
6160 case DW_FORM_flag_present
:
6172 case DW_FORM_ref_sig8
:
6175 case DW_FORM_string
:
6176 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6177 info_ptr
+= bytes_read
;
6179 case DW_FORM_sec_offset
:
6181 case DW_FORM_GNU_strp_alt
:
6182 info_ptr
+= cu
->header
.offset_size
;
6184 case DW_FORM_exprloc
:
6186 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6187 info_ptr
+= bytes_read
;
6189 case DW_FORM_block1
:
6190 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6192 case DW_FORM_block2
:
6193 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6195 case DW_FORM_block4
:
6196 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6200 case DW_FORM_ref_udata
:
6201 case DW_FORM_GNU_addr_index
:
6202 case DW_FORM_GNU_str_index
:
6203 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6205 case DW_FORM_indirect
:
6206 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6207 info_ptr
+= bytes_read
;
6208 /* We need to continue parsing from here, so just go back to
6210 goto skip_attribute
;
6213 error (_("Dwarf Error: Cannot handle %s "
6214 "in DWARF reader [in module %s]"),
6215 dwarf_form_name (form
),
6216 bfd_get_filename (abfd
));
6220 if (abbrev
->has_children
)
6221 return skip_children (reader
, info_ptr
);
6226 /* Locate ORIG_PDI's sibling.
6227 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6230 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6231 struct partial_die_info
*orig_pdi
,
6234 /* Do we know the sibling already? */
6236 if (orig_pdi
->sibling
)
6237 return orig_pdi
->sibling
;
6239 /* Are there any children to deal with? */
6241 if (!orig_pdi
->has_children
)
6244 /* Skip the children the long way. */
6246 return skip_children (reader
, info_ptr
);
6249 /* Expand this partial symbol table into a full symbol table. */
6252 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
6258 warning (_("bug: psymtab for %s is already read in."),
6265 printf_filtered (_("Reading in symbols for %s..."),
6267 gdb_flush (gdb_stdout
);
6270 /* Restore our global data. */
6271 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
6272 dwarf2_objfile_data_key
);
6274 /* If this psymtab is constructed from a debug-only objfile, the
6275 has_section_at_zero flag will not necessarily be correct. We
6276 can get the correct value for this flag by looking at the data
6277 associated with the (presumably stripped) associated objfile. */
6278 if (pst
->objfile
->separate_debug_objfile_backlink
)
6280 struct dwarf2_per_objfile
*dpo_backlink
6281 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
6282 dwarf2_objfile_data_key
);
6284 dwarf2_per_objfile
->has_section_at_zero
6285 = dpo_backlink
->has_section_at_zero
;
6288 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6290 psymtab_to_symtab_1 (pst
);
6292 /* Finish up the debug error message. */
6294 printf_filtered (_("done.\n"));
6298 process_cu_includes ();
6301 /* Reading in full CUs. */
6303 /* Add PER_CU to the queue. */
6306 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6307 enum language pretend_language
)
6309 struct dwarf2_queue_item
*item
;
6312 item
= xmalloc (sizeof (*item
));
6313 item
->per_cu
= per_cu
;
6314 item
->pretend_language
= pretend_language
;
6317 if (dwarf2_queue
== NULL
)
6318 dwarf2_queue
= item
;
6320 dwarf2_queue_tail
->next
= item
;
6322 dwarf2_queue_tail
= item
;
6325 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6326 unit and add it to our queue.
6327 The result is non-zero if PER_CU was queued, otherwise the result is zero
6328 meaning either PER_CU is already queued or it is already loaded. */
6331 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6332 struct dwarf2_per_cu_data
*per_cu
,
6333 enum language pretend_language
)
6335 /* We may arrive here during partial symbol reading, if we need full
6336 DIEs to process an unusual case (e.g. template arguments). Do
6337 not queue PER_CU, just tell our caller to load its DIEs. */
6338 if (dwarf2_per_objfile
->reading_partial_symbols
)
6340 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6345 /* Mark the dependence relation so that we don't flush PER_CU
6347 dwarf2_add_dependence (this_cu
, per_cu
);
6349 /* If it's already on the queue, we have nothing to do. */
6353 /* If the compilation unit is already loaded, just mark it as
6355 if (per_cu
->cu
!= NULL
)
6357 per_cu
->cu
->last_used
= 0;
6361 /* Add it to the queue. */
6362 queue_comp_unit (per_cu
, pretend_language
);
6367 /* Process the queue. */
6370 process_queue (void)
6372 struct dwarf2_queue_item
*item
, *next_item
;
6374 if (dwarf2_read_debug
)
6376 fprintf_unfiltered (gdb_stdlog
,
6377 "Expanding one or more symtabs of objfile %s ...\n",
6378 dwarf2_per_objfile
->objfile
->name
);
6381 /* The queue starts out with one item, but following a DIE reference
6382 may load a new CU, adding it to the end of the queue. */
6383 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6385 if (dwarf2_per_objfile
->using_index
6386 ? !item
->per_cu
->v
.quick
->symtab
6387 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6389 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6391 if (dwarf2_read_debug
)
6393 fprintf_unfiltered (gdb_stdlog
,
6394 "Expanding symtab of %s at offset 0x%x\n",
6395 per_cu
->is_debug_types
? "TU" : "CU",
6396 per_cu
->offset
.sect_off
);
6399 if (per_cu
->is_debug_types
)
6400 process_full_type_unit (per_cu
, item
->pretend_language
);
6402 process_full_comp_unit (per_cu
, item
->pretend_language
);
6404 if (dwarf2_read_debug
)
6406 fprintf_unfiltered (gdb_stdlog
,
6407 "Done expanding %s at offset 0x%x\n",
6408 per_cu
->is_debug_types
? "TU" : "CU",
6409 per_cu
->offset
.sect_off
);
6413 item
->per_cu
->queued
= 0;
6414 next_item
= item
->next
;
6418 dwarf2_queue_tail
= NULL
;
6420 if (dwarf2_read_debug
)
6422 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6423 dwarf2_per_objfile
->objfile
->name
);
6427 /* Free all allocated queue entries. This function only releases anything if
6428 an error was thrown; if the queue was processed then it would have been
6429 freed as we went along. */
6432 dwarf2_release_queue (void *dummy
)
6434 struct dwarf2_queue_item
*item
, *last
;
6436 item
= dwarf2_queue
;
6439 /* Anything still marked queued is likely to be in an
6440 inconsistent state, so discard it. */
6441 if (item
->per_cu
->queued
)
6443 if (item
->per_cu
->cu
!= NULL
)
6444 free_one_cached_comp_unit (item
->per_cu
);
6445 item
->per_cu
->queued
= 0;
6453 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6456 /* Read in full symbols for PST, and anything it depends on. */
6459 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6461 struct dwarf2_per_cu_data
*per_cu
;
6467 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6468 if (!pst
->dependencies
[i
]->readin
6469 && pst
->dependencies
[i
]->user
== NULL
)
6471 /* Inform about additional files that need to be read in. */
6474 /* FIXME: i18n: Need to make this a single string. */
6475 fputs_filtered (" ", gdb_stdout
);
6477 fputs_filtered ("and ", gdb_stdout
);
6479 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6480 wrap_here (""); /* Flush output. */
6481 gdb_flush (gdb_stdout
);
6483 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6486 per_cu
= pst
->read_symtab_private
;
6490 /* It's an include file, no symbols to read for it.
6491 Everything is in the parent symtab. */
6496 dw2_do_instantiate_symtab (per_cu
);
6499 /* Trivial hash function for die_info: the hash value of a DIE
6500 is its offset in .debug_info for this objfile. */
6503 die_hash (const void *item
)
6505 const struct die_info
*die
= item
;
6507 return die
->offset
.sect_off
;
6510 /* Trivial comparison function for die_info structures: two DIEs
6511 are equal if they have the same offset. */
6514 die_eq (const void *item_lhs
, const void *item_rhs
)
6516 const struct die_info
*die_lhs
= item_lhs
;
6517 const struct die_info
*die_rhs
= item_rhs
;
6519 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6522 /* die_reader_func for load_full_comp_unit.
6523 This is identical to read_signatured_type_reader,
6524 but is kept separate for now. */
6527 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6529 struct die_info
*comp_unit_die
,
6533 struct dwarf2_cu
*cu
= reader
->cu
;
6534 enum language
*language_ptr
= data
;
6536 gdb_assert (cu
->die_hash
== NULL
);
6538 htab_create_alloc_ex (cu
->header
.length
/ 12,
6542 &cu
->comp_unit_obstack
,
6543 hashtab_obstack_allocate
,
6544 dummy_obstack_deallocate
);
6547 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6548 &info_ptr
, comp_unit_die
);
6549 cu
->dies
= comp_unit_die
;
6550 /* comp_unit_die is not stored in die_hash, no need. */
6552 /* We try not to read any attributes in this function, because not
6553 all CUs needed for references have been loaded yet, and symbol
6554 table processing isn't initialized. But we have to set the CU language,
6555 or we won't be able to build types correctly.
6556 Similarly, if we do not read the producer, we can not apply
6557 producer-specific interpretation. */
6558 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6561 /* Load the DIEs associated with PER_CU into memory. */
6564 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6565 enum language pretend_language
)
6567 gdb_assert (! this_cu
->is_debug_types
);
6569 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6570 load_full_comp_unit_reader
, &pretend_language
);
6573 /* Add a DIE to the delayed physname list. */
6576 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6577 const char *name
, struct die_info
*die
,
6578 struct dwarf2_cu
*cu
)
6580 struct delayed_method_info mi
;
6582 mi
.fnfield_index
= fnfield_index
;
6586 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6589 /* A cleanup for freeing the delayed method list. */
6592 free_delayed_list (void *ptr
)
6594 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6595 if (cu
->method_list
!= NULL
)
6597 VEC_free (delayed_method_info
, cu
->method_list
);
6598 cu
->method_list
= NULL
;
6602 /* Compute the physnames of any methods on the CU's method list.
6604 The computation of method physnames is delayed in order to avoid the
6605 (bad) condition that one of the method's formal parameters is of an as yet
6609 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6612 struct delayed_method_info
*mi
;
6613 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6615 const char *physname
;
6616 struct fn_fieldlist
*fn_flp
6617 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6618 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
6619 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6623 /* Go objects should be embedded in a DW_TAG_module DIE,
6624 and it's not clear if/how imported objects will appear.
6625 To keep Go support simple until that's worked out,
6626 go back through what we've read and create something usable.
6627 We could do this while processing each DIE, and feels kinda cleaner,
6628 but that way is more invasive.
6629 This is to, for example, allow the user to type "p var" or "b main"
6630 without having to specify the package name, and allow lookups
6631 of module.object to work in contexts that use the expression
6635 fixup_go_packaging (struct dwarf2_cu
*cu
)
6637 char *package_name
= NULL
;
6638 struct pending
*list
;
6641 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6643 for (i
= 0; i
< list
->nsyms
; ++i
)
6645 struct symbol
*sym
= list
->symbol
[i
];
6647 if (SYMBOL_LANGUAGE (sym
) == language_go
6648 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6650 char *this_package_name
= go_symbol_package_name (sym
);
6652 if (this_package_name
== NULL
)
6654 if (package_name
== NULL
)
6655 package_name
= this_package_name
;
6658 if (strcmp (package_name
, this_package_name
) != 0)
6659 complaint (&symfile_complaints
,
6660 _("Symtab %s has objects from two different Go packages: %s and %s"),
6661 (sym
->symtab
&& sym
->symtab
->filename
6662 ? sym
->symtab
->filename
6663 : cu
->objfile
->name
),
6664 this_package_name
, package_name
);
6665 xfree (this_package_name
);
6671 if (package_name
!= NULL
)
6673 struct objfile
*objfile
= cu
->objfile
;
6674 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6675 package_name
, objfile
);
6678 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6680 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6681 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6682 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
6683 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6684 e.g., "main" finds the "main" module and not C's main(). */
6685 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6686 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6687 SYMBOL_TYPE (sym
) = type
;
6689 add_symbol_to_list (sym
, &global_symbols
);
6691 xfree (package_name
);
6695 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6697 /* Return the symtab for PER_CU. This works properly regardless of
6698 whether we're using the index or psymtabs. */
6700 static struct symtab
*
6701 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6703 return (dwarf2_per_objfile
->using_index
6704 ? per_cu
->v
.quick
->symtab
6705 : per_cu
->v
.psymtab
->symtab
);
6708 /* A helper function for computing the list of all symbol tables
6709 included by PER_CU. */
6712 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6713 htab_t all_children
,
6714 struct dwarf2_per_cu_data
*per_cu
)
6718 struct dwarf2_per_cu_data
*iter
;
6720 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6723 /* This inclusion and its children have been processed. */
6728 /* Only add a CU if it has a symbol table. */
6729 if (get_symtab (per_cu
) != NULL
)
6730 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6733 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6735 recursively_compute_inclusions (result
, all_children
, iter
);
6738 /* Compute the symtab 'includes' fields for the symtab related to
6742 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6744 gdb_assert (! per_cu
->is_debug_types
);
6746 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6749 struct dwarf2_per_cu_data
*iter
;
6750 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6751 htab_t all_children
;
6752 struct symtab
*symtab
= get_symtab (per_cu
);
6754 /* If we don't have a symtab, we can just skip this case. */
6758 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6759 NULL
, xcalloc
, xfree
);
6762 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6765 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6767 /* Now we have a transitive closure of all the included CUs, so
6768 we can convert it to a list of symtabs. */
6769 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6771 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6772 (len
+ 1) * sizeof (struct symtab
*));
6774 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6776 symtab
->includes
[ix
] = get_symtab (iter
);
6777 symtab
->includes
[len
] = NULL
;
6779 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6780 htab_delete (all_children
);
6784 /* Compute the 'includes' field for the symtabs of all the CUs we just
6788 process_cu_includes (void)
6791 struct dwarf2_per_cu_data
*iter
;
6794 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6798 if (! iter
->is_debug_types
)
6799 compute_symtab_includes (iter
);
6802 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6805 /* Generate full symbol information for PER_CU, whose DIEs have
6806 already been loaded into memory. */
6809 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6810 enum language pretend_language
)
6812 struct dwarf2_cu
*cu
= per_cu
->cu
;
6813 struct objfile
*objfile
= per_cu
->objfile
;
6814 CORE_ADDR lowpc
, highpc
;
6815 struct symtab
*symtab
;
6816 struct cleanup
*back_to
, *delayed_list_cleanup
;
6818 struct block
*static_block
;
6820 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6823 back_to
= make_cleanup (really_free_pendings
, NULL
);
6824 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6826 cu
->list_in_scope
= &file_symbols
;
6828 cu
->language
= pretend_language
;
6829 cu
->language_defn
= language_def (cu
->language
);
6831 /* Do line number decoding in read_file_scope () */
6832 process_die (cu
->dies
, cu
);
6834 /* For now fudge the Go package. */
6835 if (cu
->language
== language_go
)
6836 fixup_go_packaging (cu
);
6838 /* Now that we have processed all the DIEs in the CU, all the types
6839 should be complete, and it should now be safe to compute all of the
6841 compute_delayed_physnames (cu
);
6842 do_cleanups (delayed_list_cleanup
);
6844 /* Some compilers don't define a DW_AT_high_pc attribute for the
6845 compilation unit. If the DW_AT_high_pc is missing, synthesize
6846 it, by scanning the DIE's below the compilation unit. */
6847 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6850 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
6851 per_cu
->s
.imported_symtabs
!= NULL
);
6853 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
6854 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
6855 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
6856 addrmap to help ensure it has an accurate map of pc values belonging to
6858 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
6860 symtab
= end_symtab_from_static_block (static_block
, objfile
,
6861 SECT_OFF_TEXT (objfile
), 0);
6865 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
6867 /* Set symtab language to language from DW_AT_language. If the
6868 compilation is from a C file generated by language preprocessors, do
6869 not set the language if it was already deduced by start_subfile. */
6870 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6871 symtab
->language
= cu
->language
;
6873 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6874 produce DW_AT_location with location lists but it can be possibly
6875 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6876 there were bugs in prologue debug info, fixed later in GCC-4.5
6877 by "unwind info for epilogues" patch (which is not directly related).
6879 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6880 needed, it would be wrong due to missing DW_AT_producer there.
6882 Still one can confuse GDB by using non-standard GCC compilation
6883 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6885 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
6886 symtab
->locations_valid
= 1;
6888 if (gcc_4_minor
>= 5)
6889 symtab
->epilogue_unwind_valid
= 1;
6891 symtab
->call_site_htab
= cu
->call_site_htab
;
6894 if (dwarf2_per_objfile
->using_index
)
6895 per_cu
->v
.quick
->symtab
= symtab
;
6898 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6899 pst
->symtab
= symtab
;
6903 /* Push it for inclusion processing later. */
6904 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
6906 do_cleanups (back_to
);
6909 /* Generate full symbol information for type unit PER_CU, whose DIEs have
6910 already been loaded into memory. */
6913 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
6914 enum language pretend_language
)
6916 struct dwarf2_cu
*cu
= per_cu
->cu
;
6917 struct objfile
*objfile
= per_cu
->objfile
;
6918 struct symtab
*symtab
;
6919 struct cleanup
*back_to
, *delayed_list_cleanup
;
6922 back_to
= make_cleanup (really_free_pendings
, NULL
);
6923 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6925 cu
->list_in_scope
= &file_symbols
;
6927 cu
->language
= pretend_language
;
6928 cu
->language_defn
= language_def (cu
->language
);
6930 /* The symbol tables are set up in read_type_unit_scope. */
6931 process_die (cu
->dies
, cu
);
6933 /* For now fudge the Go package. */
6934 if (cu
->language
== language_go
)
6935 fixup_go_packaging (cu
);
6937 /* Now that we have processed all the DIEs in the CU, all the types
6938 should be complete, and it should now be safe to compute all of the
6940 compute_delayed_physnames (cu
);
6941 do_cleanups (delayed_list_cleanup
);
6943 /* TUs share symbol tables.
6944 If this is the first TU to use this symtab, complete the construction
6945 of it with end_expandable_symtab. Otherwise, complete the addition of
6946 this TU's symbols to the existing symtab. */
6947 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
6949 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
6950 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
6954 /* Set symtab language to language from DW_AT_language. If the
6955 compilation is from a C file generated by language preprocessors,
6956 do not set the language if it was already deduced by
6958 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6959 symtab
->language
= cu
->language
;
6964 augment_type_symtab (objfile
,
6965 per_cu
->s
.type_unit_group
->primary_symtab
);
6966 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
6969 if (dwarf2_per_objfile
->using_index
)
6970 per_cu
->v
.quick
->symtab
= symtab
;
6973 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6974 pst
->symtab
= symtab
;
6978 do_cleanups (back_to
);
6981 /* Process an imported unit DIE. */
6984 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
6986 struct attribute
*attr
;
6988 /* For now we don't handle imported units in type units. */
6989 if (cu
->per_cu
->is_debug_types
)
6991 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6992 " supported in type units [in module %s]"),
6996 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
6999 struct dwarf2_per_cu_data
*per_cu
;
7000 struct symtab
*imported_symtab
;
7004 offset
= dwarf2_get_ref_die_offset (attr
);
7005 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7006 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7008 /* Queue the unit, if needed. */
7009 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7010 load_full_comp_unit (per_cu
, cu
->language
);
7012 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
7017 /* Process a die and its children. */
7020 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7024 case DW_TAG_padding
:
7026 case DW_TAG_compile_unit
:
7027 case DW_TAG_partial_unit
:
7028 read_file_scope (die
, cu
);
7030 case DW_TAG_type_unit
:
7031 read_type_unit_scope (die
, cu
);
7033 case DW_TAG_subprogram
:
7034 case DW_TAG_inlined_subroutine
:
7035 read_func_scope (die
, cu
);
7037 case DW_TAG_lexical_block
:
7038 case DW_TAG_try_block
:
7039 case DW_TAG_catch_block
:
7040 read_lexical_block_scope (die
, cu
);
7042 case DW_TAG_GNU_call_site
:
7043 read_call_site_scope (die
, cu
);
7045 case DW_TAG_class_type
:
7046 case DW_TAG_interface_type
:
7047 case DW_TAG_structure_type
:
7048 case DW_TAG_union_type
:
7049 process_structure_scope (die
, cu
);
7051 case DW_TAG_enumeration_type
:
7052 process_enumeration_scope (die
, cu
);
7055 /* These dies have a type, but processing them does not create
7056 a symbol or recurse to process the children. Therefore we can
7057 read them on-demand through read_type_die. */
7058 case DW_TAG_subroutine_type
:
7059 case DW_TAG_set_type
:
7060 case DW_TAG_array_type
:
7061 case DW_TAG_pointer_type
:
7062 case DW_TAG_ptr_to_member_type
:
7063 case DW_TAG_reference_type
:
7064 case DW_TAG_string_type
:
7067 case DW_TAG_base_type
:
7068 case DW_TAG_subrange_type
:
7069 case DW_TAG_typedef
:
7070 /* Add a typedef symbol for the type definition, if it has a
7072 new_symbol (die
, read_type_die (die
, cu
), cu
);
7074 case DW_TAG_common_block
:
7075 read_common_block (die
, cu
);
7077 case DW_TAG_common_inclusion
:
7079 case DW_TAG_namespace
:
7080 processing_has_namespace_info
= 1;
7081 read_namespace (die
, cu
);
7084 processing_has_namespace_info
= 1;
7085 read_module (die
, cu
);
7087 case DW_TAG_imported_declaration
:
7088 case DW_TAG_imported_module
:
7089 processing_has_namespace_info
= 1;
7090 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7091 || cu
->language
!= language_fortran
))
7092 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7093 dwarf_tag_name (die
->tag
));
7094 read_import_statement (die
, cu
);
7097 case DW_TAG_imported_unit
:
7098 process_imported_unit_die (die
, cu
);
7102 new_symbol (die
, NULL
, cu
);
7107 /* A helper function for dwarf2_compute_name which determines whether DIE
7108 needs to have the name of the scope prepended to the name listed in the
7112 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7114 struct attribute
*attr
;
7118 case DW_TAG_namespace
:
7119 case DW_TAG_typedef
:
7120 case DW_TAG_class_type
:
7121 case DW_TAG_interface_type
:
7122 case DW_TAG_structure_type
:
7123 case DW_TAG_union_type
:
7124 case DW_TAG_enumeration_type
:
7125 case DW_TAG_enumerator
:
7126 case DW_TAG_subprogram
:
7130 case DW_TAG_variable
:
7131 case DW_TAG_constant
:
7132 /* We only need to prefix "globally" visible variables. These include
7133 any variable marked with DW_AT_external or any variable that
7134 lives in a namespace. [Variables in anonymous namespaces
7135 require prefixing, but they are not DW_AT_external.] */
7137 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7139 struct dwarf2_cu
*spec_cu
= cu
;
7141 return die_needs_namespace (die_specification (die
, &spec_cu
),
7145 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7146 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7147 && die
->parent
->tag
!= DW_TAG_module
)
7149 /* A variable in a lexical block of some kind does not need a
7150 namespace, even though in C++ such variables may be external
7151 and have a mangled name. */
7152 if (die
->parent
->tag
== DW_TAG_lexical_block
7153 || die
->parent
->tag
== DW_TAG_try_block
7154 || die
->parent
->tag
== DW_TAG_catch_block
7155 || die
->parent
->tag
== DW_TAG_subprogram
)
7164 /* Retrieve the last character from a mem_file. */
7167 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7169 char *last_char_p
= (char *) object
;
7172 *last_char_p
= buffer
[length
- 1];
7175 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7176 compute the physname for the object, which include a method's:
7177 - formal parameters (C++/Java),
7178 - receiver type (Go),
7179 - return type (Java).
7181 The term "physname" is a bit confusing.
7182 For C++, for example, it is the demangled name.
7183 For Go, for example, it's the mangled name.
7185 For Ada, return the DIE's linkage name rather than the fully qualified
7186 name. PHYSNAME is ignored..
7188 The result is allocated on the objfile_obstack and canonicalized. */
7191 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
7194 struct objfile
*objfile
= cu
->objfile
;
7197 name
= dwarf2_name (die
, cu
);
7199 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7200 compute it by typename_concat inside GDB. */
7201 if (cu
->language
== language_ada
7202 || (cu
->language
== language_fortran
&& physname
))
7204 /* For Ada unit, we prefer the linkage name over the name, as
7205 the former contains the exported name, which the user expects
7206 to be able to reference. Ideally, we want the user to be able
7207 to reference this entity using either natural or linkage name,
7208 but we haven't started looking at this enhancement yet. */
7209 struct attribute
*attr
;
7211 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7213 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7214 if (attr
&& DW_STRING (attr
))
7215 return DW_STRING (attr
);
7218 /* These are the only languages we know how to qualify names in. */
7220 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7221 || cu
->language
== language_fortran
))
7223 if (die_needs_namespace (die
, cu
))
7227 struct ui_file
*buf
;
7229 prefix
= determine_prefix (die
, cu
);
7230 buf
= mem_fileopen ();
7231 if (*prefix
!= '\0')
7233 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7236 fputs_unfiltered (prefixed_name
, buf
);
7237 xfree (prefixed_name
);
7240 fputs_unfiltered (name
, buf
);
7242 /* Template parameters may be specified in the DIE's DW_AT_name, or
7243 as children with DW_TAG_template_type_param or
7244 DW_TAG_value_type_param. If the latter, add them to the name
7245 here. If the name already has template parameters, then
7246 skip this step; some versions of GCC emit both, and
7247 it is more efficient to use the pre-computed name.
7249 Something to keep in mind about this process: it is very
7250 unlikely, or in some cases downright impossible, to produce
7251 something that will match the mangled name of a function.
7252 If the definition of the function has the same debug info,
7253 we should be able to match up with it anyway. But fallbacks
7254 using the minimal symbol, for instance to find a method
7255 implemented in a stripped copy of libstdc++, will not work.
7256 If we do not have debug info for the definition, we will have to
7257 match them up some other way.
7259 When we do name matching there is a related problem with function
7260 templates; two instantiated function templates are allowed to
7261 differ only by their return types, which we do not add here. */
7263 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7265 struct attribute
*attr
;
7266 struct die_info
*child
;
7269 die
->building_fullname
= 1;
7271 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7276 struct dwarf2_locexpr_baton
*baton
;
7279 if (child
->tag
!= DW_TAG_template_type_param
7280 && child
->tag
!= DW_TAG_template_value_param
)
7285 fputs_unfiltered ("<", buf
);
7289 fputs_unfiltered (", ", buf
);
7291 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7294 complaint (&symfile_complaints
,
7295 _("template parameter missing DW_AT_type"));
7296 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7299 type
= die_type (child
, cu
);
7301 if (child
->tag
== DW_TAG_template_type_param
)
7303 c_print_type (type
, "", buf
, -1, 0);
7307 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7310 complaint (&symfile_complaints
,
7311 _("template parameter missing "
7312 "DW_AT_const_value"));
7313 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7317 dwarf2_const_value_attr (attr
, type
, name
,
7318 &cu
->comp_unit_obstack
, cu
,
7319 &value
, &bytes
, &baton
);
7321 if (TYPE_NOSIGN (type
))
7322 /* GDB prints characters as NUMBER 'CHAR'. If that's
7323 changed, this can use value_print instead. */
7324 c_printchar (value
, type
, buf
);
7327 struct value_print_options opts
;
7330 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7334 else if (bytes
!= NULL
)
7336 v
= allocate_value (type
);
7337 memcpy (value_contents_writeable (v
), bytes
,
7338 TYPE_LENGTH (type
));
7341 v
= value_from_longest (type
, value
);
7343 /* Specify decimal so that we do not depend on
7345 get_formatted_print_options (&opts
, 'd');
7347 value_print (v
, buf
, &opts
);
7353 die
->building_fullname
= 0;
7357 /* Close the argument list, with a space if necessary
7358 (nested templates). */
7359 char last_char
= '\0';
7360 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7361 if (last_char
== '>')
7362 fputs_unfiltered (" >", buf
);
7364 fputs_unfiltered (">", buf
);
7368 /* For Java and C++ methods, append formal parameter type
7369 information, if PHYSNAME. */
7371 if (physname
&& die
->tag
== DW_TAG_subprogram
7372 && (cu
->language
== language_cplus
7373 || cu
->language
== language_java
))
7375 struct type
*type
= read_type_die (die
, cu
);
7377 c_type_print_args (type
, buf
, 1, cu
->language
);
7379 if (cu
->language
== language_java
)
7381 /* For java, we must append the return type to method
7383 if (die
->tag
== DW_TAG_subprogram
)
7384 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7387 else if (cu
->language
== language_cplus
)
7389 /* Assume that an artificial first parameter is
7390 "this", but do not crash if it is not. RealView
7391 marks unnamed (and thus unused) parameters as
7392 artificial; there is no way to differentiate
7394 if (TYPE_NFIELDS (type
) > 0
7395 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7396 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7397 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7399 fputs_unfiltered (" const", buf
);
7403 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7405 ui_file_delete (buf
);
7407 if (cu
->language
== language_cplus
)
7410 = dwarf2_canonicalize_name (name
, cu
,
7411 &objfile
->objfile_obstack
);
7422 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7423 If scope qualifiers are appropriate they will be added. The result
7424 will be allocated on the objfile_obstack, or NULL if the DIE does
7425 not have a name. NAME may either be from a previous call to
7426 dwarf2_name or NULL.
7428 The output string will be canonicalized (if C++/Java). */
7431 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7433 return dwarf2_compute_name (name
, die
, cu
, 0);
7436 /* Construct a physname for the given DIE in CU. NAME may either be
7437 from a previous call to dwarf2_name or NULL. The result will be
7438 allocated on the objfile_objstack or NULL if the DIE does not have a
7441 The output string will be canonicalized (if C++/Java). */
7444 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7446 struct objfile
*objfile
= cu
->objfile
;
7447 struct attribute
*attr
;
7448 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7449 struct cleanup
*back_to
;
7452 /* In this case dwarf2_compute_name is just a shortcut not building anything
7454 if (!die_needs_namespace (die
, cu
))
7455 return dwarf2_compute_name (name
, die
, cu
, 1);
7457 back_to
= make_cleanup (null_cleanup
, NULL
);
7459 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7461 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7463 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7465 if (attr
&& DW_STRING (attr
))
7469 mangled
= DW_STRING (attr
);
7471 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7472 type. It is easier for GDB users to search for such functions as
7473 `name(params)' than `long name(params)'. In such case the minimal
7474 symbol names do not match the full symbol names but for template
7475 functions there is never a need to look up their definition from their
7476 declaration so the only disadvantage remains the minimal symbol
7477 variant `long name(params)' does not have the proper inferior type.
7480 if (cu
->language
== language_go
)
7482 /* This is a lie, but we already lie to the caller new_symbol_full.
7483 new_symbol_full assumes we return the mangled name.
7484 This just undoes that lie until things are cleaned up. */
7489 demangled
= cplus_demangle (mangled
,
7490 (DMGL_PARAMS
| DMGL_ANSI
7491 | (cu
->language
== language_java
7492 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7497 make_cleanup (xfree
, demangled
);
7507 if (canon
== NULL
|| check_physname
)
7509 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7511 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7513 /* It may not mean a bug in GDB. The compiler could also
7514 compute DW_AT_linkage_name incorrectly. But in such case
7515 GDB would need to be bug-to-bug compatible. */
7517 complaint (&symfile_complaints
,
7518 _("Computed physname <%s> does not match demangled <%s> "
7519 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7520 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7522 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7523 is available here - over computed PHYSNAME. It is safer
7524 against both buggy GDB and buggy compilers. */
7538 retval
= obsavestring (retval
, strlen (retval
),
7539 &objfile
->objfile_obstack
);
7541 do_cleanups (back_to
);
7545 /* Read the import statement specified by the given die and record it. */
7548 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7550 struct objfile
*objfile
= cu
->objfile
;
7551 struct attribute
*import_attr
;
7552 struct die_info
*imported_die
, *child_die
;
7553 struct dwarf2_cu
*imported_cu
;
7554 const char *imported_name
;
7555 const char *imported_name_prefix
;
7556 const char *canonical_name
;
7557 const char *import_alias
;
7558 const char *imported_declaration
= NULL
;
7559 const char *import_prefix
;
7560 VEC (const_char_ptr
) *excludes
= NULL
;
7561 struct cleanup
*cleanups
;
7565 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7566 if (import_attr
== NULL
)
7568 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7569 dwarf_tag_name (die
->tag
));
7574 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7575 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7576 if (imported_name
== NULL
)
7578 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7580 The import in the following code:
7594 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7595 <52> DW_AT_decl_file : 1
7596 <53> DW_AT_decl_line : 6
7597 <54> DW_AT_import : <0x75>
7598 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7600 <5b> DW_AT_decl_file : 1
7601 <5c> DW_AT_decl_line : 2
7602 <5d> DW_AT_type : <0x6e>
7604 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7605 <76> DW_AT_byte_size : 4
7606 <77> DW_AT_encoding : 5 (signed)
7608 imports the wrong die ( 0x75 instead of 0x58 ).
7609 This case will be ignored until the gcc bug is fixed. */
7613 /* Figure out the local name after import. */
7614 import_alias
= dwarf2_name (die
, cu
);
7616 /* Figure out where the statement is being imported to. */
7617 import_prefix
= determine_prefix (die
, cu
);
7619 /* Figure out what the scope of the imported die is and prepend it
7620 to the name of the imported die. */
7621 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7623 if (imported_die
->tag
!= DW_TAG_namespace
7624 && imported_die
->tag
!= DW_TAG_module
)
7626 imported_declaration
= imported_name
;
7627 canonical_name
= imported_name_prefix
;
7629 else if (strlen (imported_name_prefix
) > 0)
7631 temp
= alloca (strlen (imported_name_prefix
)
7632 + 2 + strlen (imported_name
) + 1);
7633 strcpy (temp
, imported_name_prefix
);
7634 strcat (temp
, "::");
7635 strcat (temp
, imported_name
);
7636 canonical_name
= temp
;
7639 canonical_name
= imported_name
;
7641 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7643 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7644 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7645 child_die
= sibling_die (child_die
))
7647 /* DWARF-4: A Fortran use statement with a “rename list” may be
7648 represented by an imported module entry with an import attribute
7649 referring to the module and owned entries corresponding to those
7650 entities that are renamed as part of being imported. */
7652 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7654 complaint (&symfile_complaints
,
7655 _("child DW_TAG_imported_declaration expected "
7656 "- DIE at 0x%x [in module %s]"),
7657 child_die
->offset
.sect_off
, objfile
->name
);
7661 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7662 if (import_attr
== NULL
)
7664 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7665 dwarf_tag_name (child_die
->tag
));
7670 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7672 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7673 if (imported_name
== NULL
)
7675 complaint (&symfile_complaints
,
7676 _("child DW_TAG_imported_declaration has unknown "
7677 "imported name - DIE at 0x%x [in module %s]"),
7678 child_die
->offset
.sect_off
, objfile
->name
);
7682 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7684 process_die (child_die
, cu
);
7687 cp_add_using_directive (import_prefix
,
7690 imported_declaration
,
7692 &objfile
->objfile_obstack
);
7694 do_cleanups (cleanups
);
7697 /* Cleanup function for handle_DW_AT_stmt_list. */
7700 free_cu_line_header (void *arg
)
7702 struct dwarf2_cu
*cu
= arg
;
7704 free_line_header (cu
->line_header
);
7705 cu
->line_header
= NULL
;
7709 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7710 char **name
, char **comp_dir
)
7712 struct attribute
*attr
;
7717 /* Find the filename. Do not use dwarf2_name here, since the filename
7718 is not a source language identifier. */
7719 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7722 *name
= DW_STRING (attr
);
7725 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7727 *comp_dir
= DW_STRING (attr
);
7728 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
7730 *comp_dir
= ldirname (*name
);
7731 if (*comp_dir
!= NULL
)
7732 make_cleanup (xfree
, *comp_dir
);
7734 if (*comp_dir
!= NULL
)
7736 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7737 directory, get rid of it. */
7738 char *cp
= strchr (*comp_dir
, ':');
7740 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7745 *name
= "<unknown>";
7748 /* Handle DW_AT_stmt_list for a compilation unit.
7749 DIE is the DW_TAG_compile_unit die for CU.
7750 COMP_DIR is the compilation directory.
7751 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7754 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7755 const char *comp_dir
)
7757 struct attribute
*attr
;
7759 gdb_assert (! cu
->per_cu
->is_debug_types
);
7761 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7764 unsigned int line_offset
= DW_UNSND (attr
);
7765 struct line_header
*line_header
7766 = dwarf_decode_line_header (line_offset
, cu
);
7770 cu
->line_header
= line_header
;
7771 make_cleanup (free_cu_line_header
, cu
);
7772 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7777 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7780 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7782 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7783 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7784 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7785 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7786 struct attribute
*attr
;
7788 char *comp_dir
= NULL
;
7789 struct die_info
*child_die
;
7790 bfd
*abfd
= objfile
->obfd
;
7793 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7795 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7797 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7798 from finish_block. */
7799 if (lowpc
== ((CORE_ADDR
) -1))
7804 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7806 prepare_one_comp_unit (cu
, die
, cu
->language
);
7808 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7809 standardised yet. As a workaround for the language detection we fall
7810 back to the DW_AT_producer string. */
7811 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7812 cu
->language
= language_opencl
;
7814 /* Similar hack for Go. */
7815 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7816 set_cu_language (DW_LANG_Go
, cu
);
7818 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7820 /* Decode line number information if present. We do this before
7821 processing child DIEs, so that the line header table is available
7822 for DW_AT_decl_file. */
7823 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7825 /* Process all dies in compilation unit. */
7826 if (die
->child
!= NULL
)
7828 child_die
= die
->child
;
7829 while (child_die
&& child_die
->tag
)
7831 process_die (child_die
, cu
);
7832 child_die
= sibling_die (child_die
);
7836 /* Decode macro information, if present. Dwarf 2 macro information
7837 refers to information in the line number info statement program
7838 header, so we can only read it if we've read the header
7840 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7841 if (attr
&& cu
->line_header
)
7843 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7844 complaint (&symfile_complaints
,
7845 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7847 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
7851 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
7852 if (attr
&& cu
->line_header
)
7854 unsigned int macro_offset
= DW_UNSND (attr
);
7856 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
7860 do_cleanups (back_to
);
7863 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
7864 Create the set of symtabs used by this TU, or if this TU is sharing
7865 symtabs with another TU and the symtabs have already been created
7866 then restore those symtabs in the line header.
7867 We don't need the pc/line-number mapping for type units. */
7870 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
7872 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7873 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7874 struct type_unit_group
*tu_group
;
7876 struct line_header
*lh
;
7877 struct attribute
*attr
;
7878 unsigned int i
, line_offset
;
7880 gdb_assert (per_cu
->is_debug_types
);
7882 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7884 /* If we're using .gdb_index (includes -readnow) then
7885 per_cu->s.type_unit_group may not have been set up yet. */
7886 if (per_cu
->s
.type_unit_group
== NULL
)
7887 per_cu
->s
.type_unit_group
= get_type_unit_group (cu
, attr
);
7888 tu_group
= per_cu
->s
.type_unit_group
;
7890 /* If we've already processed this stmt_list there's no real need to
7891 do it again, we could fake it and just recreate the part we need
7892 (file name,index -> symtab mapping). If data shows this optimization
7893 is useful we can do it then. */
7894 first_time
= tu_group
->primary_symtab
== NULL
;
7896 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
7901 line_offset
= DW_UNSND (attr
);
7902 lh
= dwarf_decode_line_header (line_offset
, cu
);
7907 dwarf2_start_symtab (cu
, "", NULL
, 0);
7910 gdb_assert (tu_group
->symtabs
== NULL
);
7913 /* Note: The primary symtab will get allocated at the end. */
7917 cu
->line_header
= lh
;
7918 make_cleanup (free_cu_line_header
, cu
);
7922 dwarf2_start_symtab (cu
, "", NULL
, 0);
7924 tu_group
->num_symtabs
= lh
->num_file_names
;
7925 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
7927 for (i
= 0; i
< lh
->num_file_names
; ++i
)
7930 struct file_entry
*fe
= &lh
->file_names
[i
];
7933 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7934 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
7936 /* Note: We don't have to watch for the main subfile here, type units
7937 don't have DW_AT_name. */
7939 if (current_subfile
->symtab
== NULL
)
7941 /* NOTE: start_subfile will recognize when it's been passed
7942 a file it has already seen. So we can't assume there's a
7943 simple mapping from lh->file_names to subfiles,
7944 lh->file_names may contain dups. */
7945 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7949 fe
->symtab
= current_subfile
->symtab
;
7950 tu_group
->symtabs
[i
] = fe
->symtab
;
7957 for (i
= 0; i
< lh
->num_file_names
; ++i
)
7959 struct file_entry
*fe
= &lh
->file_names
[i
];
7961 fe
->symtab
= tu_group
->symtabs
[i
];
7965 /* The main symtab is allocated last. Type units don't have DW_AT_name
7966 so they don't have a "real" (so to speak) symtab anyway.
7967 There is later code that will assign the main symtab to all symbols
7968 that don't have one. We need to handle the case of a symbol with a
7969 missing symtab (DW_AT_decl_file) anyway. */
7972 /* Process DW_TAG_type_unit.
7973 For TUs we want to skip the first top level sibling if it's not the
7974 actual type being defined by this TU. In this case the first top
7975 level sibling is there to provide context only. */
7978 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7980 struct die_info
*child_die
;
7982 prepare_one_comp_unit (cu
, die
, language_minimal
);
7984 /* Initialize (or reinitialize) the machinery for building symtabs.
7985 We do this before processing child DIEs, so that the line header table
7986 is available for DW_AT_decl_file. */
7987 setup_type_unit_groups (die
, cu
);
7989 if (die
->child
!= NULL
)
7991 child_die
= die
->child
;
7992 while (child_die
&& child_die
->tag
)
7994 process_die (child_die
, cu
);
7995 child_die
= sibling_die (child_die
);
8003 hash_dwo_file (const void *item
)
8005 const struct dwo_file
*dwo_file
= item
;
8007 return htab_hash_string (dwo_file
->dwo_name
);
8011 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8013 const struct dwo_file
*lhs
= item_lhs
;
8014 const struct dwo_file
*rhs
= item_rhs
;
8016 return strcmp (lhs
->dwo_name
, rhs
->dwo_name
) == 0;
8019 /* Allocate a hash table for DWO files. */
8022 allocate_dwo_file_hash_table (void)
8024 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8026 return htab_create_alloc_ex (41,
8030 &objfile
->objfile_obstack
,
8031 hashtab_obstack_allocate
,
8032 dummy_obstack_deallocate
);
8036 hash_dwo_unit (const void *item
)
8038 const struct dwo_unit
*dwo_unit
= item
;
8040 /* This drops the top 32 bits of the id, but is ok for a hash. */
8041 return dwo_unit
->signature
;
8045 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8047 const struct dwo_unit
*lhs
= item_lhs
;
8048 const struct dwo_unit
*rhs
= item_rhs
;
8050 /* The signature is assumed to be unique within the DWO file.
8051 So while object file CU dwo_id's always have the value zero,
8052 that's OK, assuming each object file DWO file has only one CU,
8053 and that's the rule for now. */
8054 return lhs
->signature
== rhs
->signature
;
8057 /* Allocate a hash table for DWO CUs,TUs.
8058 There is one of these tables for each of CUs,TUs for each DWO file. */
8061 allocate_dwo_unit_table (struct objfile
*objfile
)
8063 /* Start out with a pretty small number.
8064 Generally DWO files contain only one CU and maybe some TUs. */
8065 return htab_create_alloc_ex (3,
8069 &objfile
->objfile_obstack
,
8070 hashtab_obstack_allocate
,
8071 dummy_obstack_deallocate
);
8074 /* This function is mapped across the sections and remembers the offset and
8075 size of each of the DWO debugging sections we are interested in. */
8078 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_file_ptr
)
8080 struct dwo_file
*dwo_file
= dwo_file_ptr
;
8081 const struct dwo_section_names
*names
= &dwo_section_names
;
8083 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8085 dwo_file
->sections
.abbrev
.asection
= sectp
;
8086 dwo_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
8088 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8090 dwo_file
->sections
.info
.asection
= sectp
;
8091 dwo_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
8093 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8095 dwo_file
->sections
.line
.asection
= sectp
;
8096 dwo_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
8098 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8100 dwo_file
->sections
.loc
.asection
= sectp
;
8101 dwo_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
8103 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8105 dwo_file
->sections
.macinfo
.asection
= sectp
;
8106 dwo_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
8108 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8110 dwo_file
->sections
.macro
.asection
= sectp
;
8111 dwo_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
8113 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8115 dwo_file
->sections
.str
.asection
= sectp
;
8116 dwo_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8118 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8120 dwo_file
->sections
.str_offsets
.asection
= sectp
;
8121 dwo_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
8123 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8125 struct dwarf2_section_info type_section
;
8127 memset (&type_section
, 0, sizeof (type_section
));
8128 type_section
.asection
= sectp
;
8129 type_section
.size
= bfd_get_section_size (sectp
);
8130 VEC_safe_push (dwarf2_section_info_def
, dwo_file
->sections
.types
,
8135 /* Structure used to pass data to create_debug_info_hash_table_reader. */
8137 struct create_dwo_info_table_data
8139 struct dwo_file
*dwo_file
;
8143 /* die_reader_func for create_debug_info_hash_table. */
8146 create_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8148 struct die_info
*comp_unit_die
,
8152 struct dwarf2_cu
*cu
= reader
->cu
;
8153 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8154 sect_offset offset
= cu
->per_cu
->offset
;
8155 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8156 struct create_dwo_info_table_data
*data
= datap
;
8157 struct dwo_file
*dwo_file
= data
->dwo_file
;
8158 htab_t cu_htab
= data
->cu_htab
;
8160 struct attribute
*attr
;
8161 struct dwo_unit
*dwo_unit
;
8163 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8166 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8167 " its dwo_id [in module %s]"),
8168 offset
.sect_off
, dwo_file
->dwo_name
);
8172 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8173 dwo_unit
->dwo_file
= dwo_file
;
8174 dwo_unit
->signature
= DW_UNSND (attr
);
8175 dwo_unit
->info_or_types_section
= section
;
8176 dwo_unit
->offset
= offset
;
8177 dwo_unit
->length
= cu
->per_cu
->length
;
8179 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8180 gdb_assert (slot
!= NULL
);
8183 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8185 complaint (&symfile_complaints
,
8186 _("debug entry at offset 0x%x is duplicate to the entry at"
8187 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8188 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8189 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8190 dwo_file
->dwo_name
);
8195 if (dwarf2_read_debug
)
8196 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8198 phex (dwo_unit
->signature
,
8199 sizeof (dwo_unit
->signature
)));
8202 /* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
8205 create_debug_info_hash_table (struct dwo_file
*dwo_file
)
8207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8208 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8211 gdb_byte
*info_ptr
, *end_ptr
;
8212 struct create_dwo_info_table_data create_dwo_info_table_data
;
8214 dwarf2_read_section (objfile
, section
);
8215 info_ptr
= section
->buffer
;
8217 if (info_ptr
== NULL
)
8220 /* We can't set abfd until now because the section may be empty or
8221 not present, in which case section->asection will be NULL. */
8222 abfd
= section
->asection
->owner
;
8224 if (dwarf2_read_debug
)
8225 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8226 bfd_get_filename (abfd
));
8228 cu_htab
= allocate_dwo_unit_table (objfile
);
8230 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8231 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8233 end_ptr
= info_ptr
+ section
->size
;
8234 while (info_ptr
< end_ptr
)
8236 struct dwarf2_per_cu_data per_cu
;
8238 memset (&per_cu
, 0, sizeof (per_cu
));
8239 per_cu
.objfile
= objfile
;
8240 per_cu
.is_debug_types
= 0;
8241 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8242 per_cu
.info_or_types_section
= section
;
8244 init_cutu_and_read_dies_no_follow (&per_cu
,
8245 &dwo_file
->sections
.abbrev
,
8247 create_debug_info_hash_table_reader
,
8248 &create_dwo_info_table_data
);
8250 info_ptr
+= per_cu
.length
;
8256 /* Subroutine of open_dwo_file to simplify it.
8257 Open the file specified by FILE_NAME and hand it off to BFD for
8258 preliminary analysis. Return a newly initialized bfd *, which
8259 includes a canonicalized copy of FILE_NAME.
8260 In case of trouble, return NULL.
8261 NOTE: This function is derived from symfile_bfd_open. */
8264 try_open_dwo_file (const char *file_name
)
8268 char *absolute_name
;
8270 desc
= openp (debug_file_directory
, OPF_TRY_CWD_FIRST
, file_name
,
8271 O_RDONLY
| O_BINARY
, &absolute_name
);
8275 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8278 xfree (absolute_name
);
8281 xfree (absolute_name
);
8282 bfd_set_cacheable (sym_bfd
, 1);
8284 if (!bfd_check_format (sym_bfd
, bfd_object
))
8286 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8293 /* Try to open DWO file DWO_NAME.
8294 COMP_DIR is the DW_AT_comp_dir attribute.
8295 The result is the bfd handle of the file.
8296 If there is a problem finding or opening the file, return NULL.
8297 Upon success, the canonicalized path of the file is stored in the bfd,
8298 same as symfile_bfd_open. */
8301 open_dwo_file (const char *dwo_name
, const char *comp_dir
)
8305 if (IS_ABSOLUTE_PATH (dwo_name
))
8306 return try_open_dwo_file (dwo_name
);
8308 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8310 if (comp_dir
!= NULL
)
8312 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, dwo_name
, NULL
);
8314 /* NOTE: If comp_dir is a relative path, this will also try the
8315 search path, which seems useful. */
8316 abfd
= try_open_dwo_file (path_to_try
);
8317 xfree (path_to_try
);
8322 /* That didn't work, try debug-file-directory, which, despite its name,
8323 is a list of paths. */
8325 if (*debug_file_directory
== '\0')
8328 return try_open_dwo_file (dwo_name
);
8331 /* Initialize the use of the DWO file specified by DWO_NAME. */
8333 static struct dwo_file
*
8334 init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8337 struct dwo_file
*dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8340 struct cleanup
*cleanups
;
8342 if (dwarf2_read_debug
)
8343 fprintf_unfiltered (gdb_stdlog
, "Reading DWO file %s:\n", dwo_name
);
8345 abfd
= open_dwo_file (dwo_name
, comp_dir
);
8348 dwo_file
->dwo_name
= dwo_name
;
8349 dwo_file
->dwo_bfd
= abfd
;
8351 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8353 bfd_map_over_sections (abfd
, dwarf2_locate_dwo_sections
, dwo_file
);
8355 dwo_file
->cus
= create_debug_info_hash_table (dwo_file
);
8357 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8358 dwo_file
->sections
.types
);
8360 discard_cleanups (cleanups
);
8365 /* Lookup DWO file DWO_NAME. */
8367 static struct dwo_file
*
8368 lookup_dwo_file (char *dwo_name
, const char *comp_dir
)
8370 struct dwo_file
*dwo_file
;
8371 struct dwo_file find_entry
;
8374 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8375 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8377 /* Have we already seen this DWO file? */
8378 find_entry
.dwo_name
= dwo_name
;
8379 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8381 /* If not, read it in and build a table of the DWOs it contains. */
8383 *slot
= init_dwo_file (dwo_name
, comp_dir
);
8385 /* NOTE: This will be NULL if unable to open the file. */
8391 /* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
8392 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8393 SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
8394 nomenclature as TUs).
8395 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8396 (dwo_id mismatch or couldn't find the DWO file). */
8398 static struct dwo_unit
*
8399 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8400 char *dwo_name
, const char *comp_dir
,
8403 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8404 struct dwo_file
*dwo_file
;
8406 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
8407 if (dwo_file
== NULL
)
8410 /* Look up the DWO using its signature(dwo_id). */
8412 if (dwo_file
->cus
!= NULL
)
8414 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8416 find_dwo_cu
.signature
= signature
;
8417 dwo_cu
= htab_find (dwo_file
->cus
, &find_dwo_cu
);
8423 /* We didn't find it. This must mean a dwo_id mismatch. */
8425 complaint (&symfile_complaints
,
8426 _("Could not find DWO CU referenced by CU at offset 0x%x"
8428 this_cu
->offset
.sect_off
, objfile
->name
);
8432 /* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
8433 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8434 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8435 (dwo_id mismatch or couldn't find the DWO file). */
8437 static struct dwo_unit
*
8438 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
8439 char *dwo_name
, const char *comp_dir
)
8441 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8442 struct dwo_file
*dwo_file
;
8444 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
8445 if (dwo_file
== NULL
)
8448 /* Look up the DWO using its signature(dwo_id). */
8450 if (dwo_file
->tus
!= NULL
)
8452 struct dwo_unit find_dwo_tu
, *dwo_tu
;
8454 find_dwo_tu
.signature
= this_tu
->signature
;
8455 dwo_tu
= htab_find (dwo_file
->tus
, &find_dwo_tu
);
8461 /* We didn't find it. This must mean a dwo_id mismatch. */
8463 complaint (&symfile_complaints
,
8464 _("Could not find DWO TU referenced by TU at offset 0x%x"
8466 this_tu
->per_cu
.offset
.sect_off
, objfile
->name
);
8470 /* Free all resources associated with DWO_FILE.
8471 Close the DWO file and munmap the sections.
8472 All memory should be on the objfile obstack. */
8475 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
8478 struct dwarf2_section_info
*section
;
8480 gdb_assert (dwo_file
->dwo_bfd
!= objfile
->obfd
);
8481 gdb_bfd_unref (dwo_file
->dwo_bfd
);
8483 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
8486 /* Wrapper for free_dwo_file for use in cleanups. */
8489 free_dwo_file_cleanup (void *arg
)
8491 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
8492 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8494 free_dwo_file (dwo_file
, objfile
);
8497 /* Traversal function for free_dwo_files. */
8500 free_dwo_file_from_slot (void **slot
, void *info
)
8502 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8503 struct objfile
*objfile
= (struct objfile
*) info
;
8505 free_dwo_file (dwo_file
, objfile
);
8510 /* Free all resources associated with DWO_FILES. */
8513 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
8515 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
8518 /* Read in various DIEs. */
8520 /* qsort helper for inherit_abstract_dies. */
8523 unsigned_int_compar (const void *ap
, const void *bp
)
8525 unsigned int a
= *(unsigned int *) ap
;
8526 unsigned int b
= *(unsigned int *) bp
;
8528 return (a
> b
) - (b
> a
);
8531 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
8532 Inherit only the children of the DW_AT_abstract_origin DIE not being
8533 already referenced by DW_AT_abstract_origin from the children of the
8537 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
8539 struct die_info
*child_die
;
8540 unsigned die_children_count
;
8541 /* CU offsets which were referenced by children of the current DIE. */
8542 sect_offset
*offsets
;
8543 sect_offset
*offsets_end
, *offsetp
;
8544 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
8545 struct die_info
*origin_die
;
8546 /* Iterator of the ORIGIN_DIE children. */
8547 struct die_info
*origin_child_die
;
8548 struct cleanup
*cleanups
;
8549 struct attribute
*attr
;
8550 struct dwarf2_cu
*origin_cu
;
8551 struct pending
**origin_previous_list_in_scope
;
8553 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
8557 /* Note that following die references may follow to a die in a
8561 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
8563 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
8565 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
8566 origin_cu
->list_in_scope
= cu
->list_in_scope
;
8568 if (die
->tag
!= origin_die
->tag
8569 && !(die
->tag
== DW_TAG_inlined_subroutine
8570 && origin_die
->tag
== DW_TAG_subprogram
))
8571 complaint (&symfile_complaints
,
8572 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
8573 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
8575 child_die
= die
->child
;
8576 die_children_count
= 0;
8577 while (child_die
&& child_die
->tag
)
8579 child_die
= sibling_die (child_die
);
8580 die_children_count
++;
8582 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
8583 cleanups
= make_cleanup (xfree
, offsets
);
8585 offsets_end
= offsets
;
8586 child_die
= die
->child
;
8587 while (child_die
&& child_die
->tag
)
8589 /* For each CHILD_DIE, find the corresponding child of
8590 ORIGIN_DIE. If there is more than one layer of
8591 DW_AT_abstract_origin, follow them all; there shouldn't be,
8592 but GCC versions at least through 4.4 generate this (GCC PR
8594 struct die_info
*child_origin_die
= child_die
;
8595 struct dwarf2_cu
*child_origin_cu
= cu
;
8599 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
8603 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
8607 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
8608 counterpart may exist. */
8609 if (child_origin_die
!= child_die
)
8611 if (child_die
->tag
!= child_origin_die
->tag
8612 && !(child_die
->tag
== DW_TAG_inlined_subroutine
8613 && child_origin_die
->tag
== DW_TAG_subprogram
))
8614 complaint (&symfile_complaints
,
8615 _("Child DIE 0x%x and its abstract origin 0x%x have "
8616 "different tags"), child_die
->offset
.sect_off
,
8617 child_origin_die
->offset
.sect_off
);
8618 if (child_origin_die
->parent
!= origin_die
)
8619 complaint (&symfile_complaints
,
8620 _("Child DIE 0x%x and its abstract origin 0x%x have "
8621 "different parents"), child_die
->offset
.sect_off
,
8622 child_origin_die
->offset
.sect_off
);
8624 *offsets_end
++ = child_origin_die
->offset
;
8626 child_die
= sibling_die (child_die
);
8628 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
8629 unsigned_int_compar
);
8630 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
8631 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
8632 complaint (&symfile_complaints
,
8633 _("Multiple children of DIE 0x%x refer "
8634 "to DIE 0x%x as their abstract origin"),
8635 die
->offset
.sect_off
, offsetp
->sect_off
);
8638 origin_child_die
= origin_die
->child
;
8639 while (origin_child_die
&& origin_child_die
->tag
)
8641 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
8642 while (offsetp
< offsets_end
8643 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
8645 if (offsetp
>= offsets_end
8646 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
8648 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
8649 process_die (origin_child_die
, origin_cu
);
8651 origin_child_die
= sibling_die (origin_child_die
);
8653 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
8655 do_cleanups (cleanups
);
8659 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8661 struct objfile
*objfile
= cu
->objfile
;
8662 struct context_stack
*new;
8665 struct die_info
*child_die
;
8666 struct attribute
*attr
, *call_line
, *call_file
;
8669 struct block
*block
;
8670 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8671 VEC (symbolp
) *template_args
= NULL
;
8672 struct template_symbol
*templ_func
= NULL
;
8676 /* If we do not have call site information, we can't show the
8677 caller of this inlined function. That's too confusing, so
8678 only use the scope for local variables. */
8679 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
8680 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
8681 if (call_line
== NULL
|| call_file
== NULL
)
8683 read_lexical_block_scope (die
, cu
);
8688 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8690 name
= dwarf2_name (die
, cu
);
8692 /* Ignore functions with missing or empty names. These are actually
8693 illegal according to the DWARF standard. */
8696 complaint (&symfile_complaints
,
8697 _("missing name for subprogram DIE at %d"),
8698 die
->offset
.sect_off
);
8702 /* Ignore functions with missing or invalid low and high pc attributes. */
8703 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
8705 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8706 if (!attr
|| !DW_UNSND (attr
))
8707 complaint (&symfile_complaints
,
8708 _("cannot get low and high bounds "
8709 "for subprogram DIE at %d"),
8710 die
->offset
.sect_off
);
8717 /* If we have any template arguments, then we must allocate a
8718 different sort of symbol. */
8719 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
8721 if (child_die
->tag
== DW_TAG_template_type_param
8722 || child_die
->tag
== DW_TAG_template_value_param
)
8724 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8725 struct template_symbol
);
8726 templ_func
->base
.is_cplus_template_function
= 1;
8731 new = push_context (0, lowpc
);
8732 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
8733 (struct symbol
*) templ_func
);
8735 /* If there is a location expression for DW_AT_frame_base, record
8737 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
8739 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
8740 expression is being recorded directly in the function's symbol
8741 and not in a separate frame-base object. I guess this hack is
8742 to avoid adding some sort of frame-base adjunct/annex to the
8743 function's symbol :-(. The problem with doing this is that it
8744 results in a function symbol with a location expression that
8745 has nothing to do with the location of the function, ouch! The
8746 relationship should be: a function's symbol has-a frame base; a
8747 frame-base has-a location expression. */
8748 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
8750 cu
->list_in_scope
= &local_symbols
;
8752 if (die
->child
!= NULL
)
8754 child_die
= die
->child
;
8755 while (child_die
&& child_die
->tag
)
8757 if (child_die
->tag
== DW_TAG_template_type_param
8758 || child_die
->tag
== DW_TAG_template_value_param
)
8760 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
8763 VEC_safe_push (symbolp
, template_args
, arg
);
8766 process_die (child_die
, cu
);
8767 child_die
= sibling_die (child_die
);
8771 inherit_abstract_dies (die
, cu
);
8773 /* If we have a DW_AT_specification, we might need to import using
8774 directives from the context of the specification DIE. See the
8775 comment in determine_prefix. */
8776 if (cu
->language
== language_cplus
8777 && dwarf2_attr (die
, DW_AT_specification
, cu
))
8779 struct dwarf2_cu
*spec_cu
= cu
;
8780 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
8784 child_die
= spec_die
->child
;
8785 while (child_die
&& child_die
->tag
)
8787 if (child_die
->tag
== DW_TAG_imported_module
)
8788 process_die (child_die
, spec_cu
);
8789 child_die
= sibling_die (child_die
);
8792 /* In some cases, GCC generates specification DIEs that
8793 themselves contain DW_AT_specification attributes. */
8794 spec_die
= die_specification (spec_die
, &spec_cu
);
8798 new = pop_context ();
8799 /* Make a block for the local symbols within. */
8800 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
8801 lowpc
, highpc
, objfile
);
8803 /* For C++, set the block's scope. */
8804 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
8805 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
8806 determine_prefix (die
, cu
),
8807 processing_has_namespace_info
);
8809 /* If we have address ranges, record them. */
8810 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
8812 /* Attach template arguments to function. */
8813 if (! VEC_empty (symbolp
, template_args
))
8815 gdb_assert (templ_func
!= NULL
);
8817 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
8818 templ_func
->template_arguments
8819 = obstack_alloc (&objfile
->objfile_obstack
,
8820 (templ_func
->n_template_arguments
8821 * sizeof (struct symbol
*)));
8822 memcpy (templ_func
->template_arguments
,
8823 VEC_address (symbolp
, template_args
),
8824 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
8825 VEC_free (symbolp
, template_args
);
8828 /* In C++, we can have functions nested inside functions (e.g., when
8829 a function declares a class that has methods). This means that
8830 when we finish processing a function scope, we may need to go
8831 back to building a containing block's symbol lists. */
8832 local_symbols
= new->locals
;
8833 param_symbols
= new->params
;
8834 using_directives
= new->using_directives
;
8836 /* If we've finished processing a top-level function, subsequent
8837 symbols go in the file symbol list. */
8838 if (outermost_context_p ())
8839 cu
->list_in_scope
= &file_symbols
;
8842 /* Process all the DIES contained within a lexical block scope. Start
8843 a new scope, process the dies, and then close the scope. */
8846 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8848 struct objfile
*objfile
= cu
->objfile
;
8849 struct context_stack
*new;
8850 CORE_ADDR lowpc
, highpc
;
8851 struct die_info
*child_die
;
8854 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8856 /* Ignore blocks with missing or invalid low and high pc attributes. */
8857 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
8858 as multiple lexical blocks? Handling children in a sane way would
8859 be nasty. Might be easier to properly extend generic blocks to
8861 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
8866 push_context (0, lowpc
);
8867 if (die
->child
!= NULL
)
8869 child_die
= die
->child
;
8870 while (child_die
&& child_die
->tag
)
8872 process_die (child_die
, cu
);
8873 child_die
= sibling_die (child_die
);
8876 new = pop_context ();
8878 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
8881 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
8884 /* Note that recording ranges after traversing children, as we
8885 do here, means that recording a parent's ranges entails
8886 walking across all its children's ranges as they appear in
8887 the address map, which is quadratic behavior.
8889 It would be nicer to record the parent's ranges before
8890 traversing its children, simply overriding whatever you find
8891 there. But since we don't even decide whether to create a
8892 block until after we've traversed its children, that's hard
8894 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
8896 local_symbols
= new->locals
;
8897 using_directives
= new->using_directives
;
8900 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
8903 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8905 struct objfile
*objfile
= cu
->objfile
;
8906 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8907 CORE_ADDR pc
, baseaddr
;
8908 struct attribute
*attr
;
8909 struct call_site
*call_site
, call_site_local
;
8912 struct die_info
*child_die
;
8914 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8916 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8919 complaint (&symfile_complaints
,
8920 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
8921 "DIE 0x%x [in module %s]"),
8922 die
->offset
.sect_off
, objfile
->name
);
8925 pc
= DW_ADDR (attr
) + baseaddr
;
8927 if (cu
->call_site_htab
== NULL
)
8928 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
8929 NULL
, &objfile
->objfile_obstack
,
8930 hashtab_obstack_allocate
, NULL
);
8931 call_site_local
.pc
= pc
;
8932 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
8935 complaint (&symfile_complaints
,
8936 _("Duplicate PC %s for DW_TAG_GNU_call_site "
8937 "DIE 0x%x [in module %s]"),
8938 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
8942 /* Count parameters at the caller. */
8945 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8946 child_die
= sibling_die (child_die
))
8948 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
8950 complaint (&symfile_complaints
,
8951 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
8952 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8953 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
8960 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
8961 (sizeof (*call_site
)
8962 + (sizeof (*call_site
->parameter
)
8965 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
8968 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
8970 struct die_info
*func_die
;
8972 /* Skip also over DW_TAG_inlined_subroutine. */
8973 for (func_die
= die
->parent
;
8974 func_die
&& func_die
->tag
!= DW_TAG_subprogram
8975 && func_die
->tag
!= DW_TAG_subroutine_type
;
8976 func_die
= func_die
->parent
);
8978 /* DW_AT_GNU_all_call_sites is a superset
8979 of DW_AT_GNU_all_tail_call_sites. */
8981 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
8982 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
8984 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
8985 not complete. But keep CALL_SITE for look ups via call_site_htab,
8986 both the initial caller containing the real return address PC and
8987 the final callee containing the current PC of a chain of tail
8988 calls do not need to have the tail call list complete. But any
8989 function candidate for a virtual tail call frame searched via
8990 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
8991 determined unambiguously. */
8995 struct type
*func_type
= NULL
;
8998 func_type
= get_die_type (func_die
, cu
);
8999 if (func_type
!= NULL
)
9001 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9003 /* Enlist this call site to the function. */
9004 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9005 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9008 complaint (&symfile_complaints
,
9009 _("Cannot find function owning DW_TAG_GNU_call_site "
9010 "DIE 0x%x [in module %s]"),
9011 die
->offset
.sect_off
, objfile
->name
);
9015 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9017 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9018 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9019 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9020 /* Keep NULL DWARF_BLOCK. */;
9021 else if (attr_form_is_block (attr
))
9023 struct dwarf2_locexpr_baton
*dlbaton
;
9025 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9026 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9027 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9028 dlbaton
->per_cu
= cu
->per_cu
;
9030 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9032 else if (is_ref_attr (attr
))
9034 struct dwarf2_cu
*target_cu
= cu
;
9035 struct die_info
*target_die
;
9037 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9038 gdb_assert (target_cu
->objfile
== objfile
);
9039 if (die_is_declaration (target_die
, target_cu
))
9041 const char *target_physname
;
9043 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9044 if (target_physname
== NULL
)
9045 complaint (&symfile_complaints
,
9046 _("DW_AT_GNU_call_site_target target DIE has invalid "
9047 "physname, for referencing DIE 0x%x [in module %s]"),
9048 die
->offset
.sect_off
, objfile
->name
);
9050 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
9056 /* DW_AT_entry_pc should be preferred. */
9057 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9058 complaint (&symfile_complaints
,
9059 _("DW_AT_GNU_call_site_target target DIE has invalid "
9060 "low pc, for referencing DIE 0x%x [in module %s]"),
9061 die
->offset
.sect_off
, objfile
->name
);
9063 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9067 complaint (&symfile_complaints
,
9068 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9069 "block nor reference, for DIE 0x%x [in module %s]"),
9070 die
->offset
.sect_off
, objfile
->name
);
9072 call_site
->per_cu
= cu
->per_cu
;
9074 for (child_die
= die
->child
;
9075 child_die
&& child_die
->tag
;
9076 child_die
= sibling_die (child_die
))
9078 struct call_site_parameter
*parameter
;
9079 struct attribute
*loc
, *origin
;
9081 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9083 /* Already printed the complaint above. */
9087 gdb_assert (call_site
->parameter_count
< nparams
);
9088 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9090 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9091 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9092 register is contained in DW_AT_GNU_call_site_value. */
9094 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9095 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9096 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9100 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9101 offset
= dwarf2_get_ref_die_offset (origin
);
9102 if (!offset_in_cu_p (&cu
->header
, offset
))
9104 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9105 binding can be done only inside one CU. Such referenced DIE
9106 therefore cannot be even moved to DW_TAG_partial_unit. */
9107 complaint (&symfile_complaints
,
9108 _("DW_AT_abstract_origin offset is not in CU for "
9109 "DW_TAG_GNU_call_site child DIE 0x%x "
9111 child_die
->offset
.sect_off
, objfile
->name
);
9114 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9115 - cu
->header
.offset
.sect_off
);
9117 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9119 complaint (&symfile_complaints
,
9120 _("No DW_FORM_block* DW_AT_location for "
9121 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9122 child_die
->offset
.sect_off
, objfile
->name
);
9127 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9128 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9129 if (parameter
->u
.dwarf_reg
!= -1)
9130 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9131 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9132 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9133 ¶meter
->u
.fb_offset
))
9134 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9137 complaint (&symfile_complaints
,
9138 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9139 "for DW_FORM_block* DW_AT_location is supported for "
9140 "DW_TAG_GNU_call_site child DIE 0x%x "
9142 child_die
->offset
.sect_off
, objfile
->name
);
9147 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9148 if (!attr_form_is_block (attr
))
9150 complaint (&symfile_complaints
,
9151 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9152 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9153 child_die
->offset
.sect_off
, objfile
->name
);
9156 parameter
->value
= DW_BLOCK (attr
)->data
;
9157 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9159 /* Parameters are not pre-cleared by memset above. */
9160 parameter
->data_value
= NULL
;
9161 parameter
->data_value_size
= 0;
9162 call_site
->parameter_count
++;
9164 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9167 if (!attr_form_is_block (attr
))
9168 complaint (&symfile_complaints
,
9169 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9170 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9171 child_die
->offset
.sect_off
, objfile
->name
);
9174 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9175 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9181 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9182 Return 1 if the attributes are present and valid, otherwise, return 0.
9183 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9186 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9187 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9188 struct partial_symtab
*ranges_pst
)
9190 struct objfile
*objfile
= cu
->objfile
;
9191 struct comp_unit_head
*cu_header
= &cu
->header
;
9192 bfd
*obfd
= objfile
->obfd
;
9193 unsigned int addr_size
= cu_header
->addr_size
;
9194 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9195 /* Base address selection entry. */
9206 found_base
= cu
->base_known
;
9207 base
= cu
->base_address
;
9209 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9210 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9212 complaint (&symfile_complaints
,
9213 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9217 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9219 /* Read in the largest possible address. */
9220 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9221 if ((marker
& mask
) == mask
)
9223 /* If we found the largest possible address, then
9224 read the base address. */
9225 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9226 buffer
+= 2 * addr_size
;
9227 offset
+= 2 * addr_size
;
9233 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9237 CORE_ADDR range_beginning
, range_end
;
9239 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9240 buffer
+= addr_size
;
9241 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9242 buffer
+= addr_size
;
9243 offset
+= 2 * addr_size
;
9245 /* An end of list marker is a pair of zero addresses. */
9246 if (range_beginning
== 0 && range_end
== 0)
9247 /* Found the end of list entry. */
9250 /* Each base address selection entry is a pair of 2 values.
9251 The first is the largest possible address, the second is
9252 the base address. Check for a base address here. */
9253 if ((range_beginning
& mask
) == mask
)
9255 /* If we found the largest possible address, then
9256 read the base address. */
9257 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9264 /* We have no valid base address for the ranges
9266 complaint (&symfile_complaints
,
9267 _("Invalid .debug_ranges data (no base address)"));
9271 if (range_beginning
> range_end
)
9273 /* Inverted range entries are invalid. */
9274 complaint (&symfile_complaints
,
9275 _("Invalid .debug_ranges data (inverted range)"));
9279 /* Empty range entries have no effect. */
9280 if (range_beginning
== range_end
)
9283 range_beginning
+= base
;
9286 /* A not-uncommon case of bad debug info.
9287 Don't pollute the addrmap with bad data. */
9288 if (range_beginning
+ baseaddr
== 0
9289 && !dwarf2_per_objfile
->has_section_at_zero
)
9291 complaint (&symfile_complaints
,
9292 _(".debug_ranges entry has start address of zero"
9293 " [in module %s]"), objfile
->name
);
9297 if (ranges_pst
!= NULL
)
9298 addrmap_set_empty (objfile
->psymtabs_addrmap
,
9299 range_beginning
+ baseaddr
,
9300 range_end
- 1 + baseaddr
,
9303 /* FIXME: This is recording everything as a low-high
9304 segment of consecutive addresses. We should have a
9305 data structure for discontiguous block ranges
9309 low
= range_beginning
;
9315 if (range_beginning
< low
)
9316 low
= range_beginning
;
9317 if (range_end
> high
)
9323 /* If the first entry is an end-of-list marker, the range
9324 describes an empty scope, i.e. no instructions. */
9330 *high_return
= high
;
9334 /* Get low and high pc attributes from a die. Return 1 if the attributes
9335 are present and valid, otherwise, return 0. Return -1 if the range is
9336 discontinuous, i.e. derived from DW_AT_ranges information. */
9339 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
9340 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
9341 struct partial_symtab
*pst
)
9343 struct attribute
*attr
;
9344 struct attribute
*attr_high
;
9349 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
9352 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9355 low
= DW_ADDR (attr
);
9356 if (attr_high
->form
== DW_FORM_addr
9357 || attr_high
->form
== DW_FORM_GNU_addr_index
)
9358 high
= DW_ADDR (attr_high
);
9360 high
= low
+ DW_UNSND (attr_high
);
9363 /* Found high w/o low attribute. */
9366 /* Found consecutive range of addresses. */
9371 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
9374 unsigned int ranges_offset
= DW_UNSND (attr
) + cu
->ranges_base
;
9376 /* Value of the DW_AT_ranges attribute is the offset in the
9377 .debug_ranges section. */
9378 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
9380 /* Found discontinuous range of addresses. */
9385 /* read_partial_die has also the strict LOW < HIGH requirement. */
9389 /* When using the GNU linker, .gnu.linkonce. sections are used to
9390 eliminate duplicate copies of functions and vtables and such.
9391 The linker will arbitrarily choose one and discard the others.
9392 The AT_*_pc values for such functions refer to local labels in
9393 these sections. If the section from that file was discarded, the
9394 labels are not in the output, so the relocs get a value of 0.
9395 If this is a discarded function, mark the pc bounds as invalid,
9396 so that GDB will ignore it. */
9397 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9406 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
9407 its low and high PC addresses. Do nothing if these addresses could not
9408 be determined. Otherwise, set LOWPC to the low address if it is smaller,
9409 and HIGHPC to the high address if greater than HIGHPC. */
9412 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
9413 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9414 struct dwarf2_cu
*cu
)
9416 CORE_ADDR low
, high
;
9417 struct die_info
*child
= die
->child
;
9419 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
9421 *lowpc
= min (*lowpc
, low
);
9422 *highpc
= max (*highpc
, high
);
9425 /* If the language does not allow nested subprograms (either inside
9426 subprograms or lexical blocks), we're done. */
9427 if (cu
->language
!= language_ada
)
9430 /* Check all the children of the given DIE. If it contains nested
9431 subprograms, then check their pc bounds. Likewise, we need to
9432 check lexical blocks as well, as they may also contain subprogram
9434 while (child
&& child
->tag
)
9436 if (child
->tag
== DW_TAG_subprogram
9437 || child
->tag
== DW_TAG_lexical_block
)
9438 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
9439 child
= sibling_die (child
);
9443 /* Get the low and high pc's represented by the scope DIE, and store
9444 them in *LOWPC and *HIGHPC. If the correct values can't be
9445 determined, set *LOWPC to -1 and *HIGHPC to 0. */
9448 get_scope_pc_bounds (struct die_info
*die
,
9449 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9450 struct dwarf2_cu
*cu
)
9452 CORE_ADDR best_low
= (CORE_ADDR
) -1;
9453 CORE_ADDR best_high
= (CORE_ADDR
) 0;
9454 CORE_ADDR current_low
, current_high
;
9456 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
9458 best_low
= current_low
;
9459 best_high
= current_high
;
9463 struct die_info
*child
= die
->child
;
9465 while (child
&& child
->tag
)
9467 switch (child
->tag
) {
9468 case DW_TAG_subprogram
:
9469 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
9471 case DW_TAG_namespace
:
9473 /* FIXME: carlton/2004-01-16: Should we do this for
9474 DW_TAG_class_type/DW_TAG_structure_type, too? I think
9475 that current GCC's always emit the DIEs corresponding
9476 to definitions of methods of classes as children of a
9477 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
9478 the DIEs giving the declarations, which could be
9479 anywhere). But I don't see any reason why the
9480 standards says that they have to be there. */
9481 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
9483 if (current_low
!= ((CORE_ADDR
) -1))
9485 best_low
= min (best_low
, current_low
);
9486 best_high
= max (best_high
, current_high
);
9494 child
= sibling_die (child
);
9499 *highpc
= best_high
;
9502 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
9506 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
9507 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
9509 struct objfile
*objfile
= cu
->objfile
;
9510 struct attribute
*attr
;
9511 struct attribute
*attr_high
;
9513 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
9516 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9519 CORE_ADDR low
= DW_ADDR (attr
);
9521 if (attr_high
->form
== DW_FORM_addr
9522 || attr_high
->form
== DW_FORM_GNU_addr_index
)
9523 high
= DW_ADDR (attr_high
);
9525 high
= low
+ DW_UNSND (attr_high
);
9527 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
9531 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
9534 bfd
*obfd
= objfile
->obfd
;
9536 /* The value of the DW_AT_ranges attribute is the offset of the
9537 address range list in the .debug_ranges section. */
9538 unsigned long offset
= DW_UNSND (attr
) + cu
->ranges_base
;
9539 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9541 /* For some target architectures, but not others, the
9542 read_address function sign-extends the addresses it returns.
9543 To recognize base address selection entries, we need a
9545 unsigned int addr_size
= cu
->header
.addr_size
;
9546 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9548 /* The base address, to which the next pair is relative. Note
9549 that this 'base' is a DWARF concept: most entries in a range
9550 list are relative, to reduce the number of relocs against the
9551 debugging information. This is separate from this function's
9552 'baseaddr' argument, which GDB uses to relocate debugging
9553 information from a shared library based on the address at
9554 which the library was loaded. */
9555 CORE_ADDR base
= cu
->base_address
;
9556 int base_known
= cu
->base_known
;
9558 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
9559 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9561 complaint (&symfile_complaints
,
9562 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
9569 unsigned int bytes_read
;
9570 CORE_ADDR start
, end
;
9572 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
9573 buffer
+= bytes_read
;
9574 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
9575 buffer
+= bytes_read
;
9577 /* Did we find the end of the range list? */
9578 if (start
== 0 && end
== 0)
9581 /* Did we find a base address selection entry? */
9582 else if ((start
& base_select_mask
) == base_select_mask
)
9588 /* We found an ordinary address range. */
9593 complaint (&symfile_complaints
,
9594 _("Invalid .debug_ranges data "
9595 "(no base address)"));
9601 /* Inverted range entries are invalid. */
9602 complaint (&symfile_complaints
,
9603 _("Invalid .debug_ranges data "
9604 "(inverted range)"));
9608 /* Empty range entries have no effect. */
9612 start
+= base
+ baseaddr
;
9613 end
+= base
+ baseaddr
;
9615 /* A not-uncommon case of bad debug info.
9616 Don't pollute the addrmap with bad data. */
9617 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9619 complaint (&symfile_complaints
,
9620 _(".debug_ranges entry has start address of zero"
9621 " [in module %s]"), objfile
->name
);
9625 record_block_range (block
, start
, end
- 1);
9631 /* Check whether the producer field indicates either of GCC < 4.6, or the
9632 Intel C/C++ compiler, and cache the result in CU. */
9635 check_producer (struct dwarf2_cu
*cu
)
9638 int major
, minor
, release
;
9640 if (cu
->producer
== NULL
)
9642 /* For unknown compilers expect their behavior is DWARF version
9645 GCC started to support .debug_types sections by -gdwarf-4 since
9646 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
9647 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
9648 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
9649 interpreted incorrectly by GDB now - GCC PR debug/48229. */
9651 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
9653 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
9655 cs
= &cu
->producer
[strlen ("GNU ")];
9656 while (*cs
&& !isdigit (*cs
))
9658 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
9660 /* Not recognized as GCC. */
9663 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
9665 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
9666 cu
->producer_is_icc
= 1;
9669 /* For other non-GCC compilers, expect their behavior is DWARF version
9673 cu
->checked_producer
= 1;
9676 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
9677 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
9678 during 4.6.0 experimental. */
9681 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
9683 if (!cu
->checked_producer
)
9684 check_producer (cu
);
9686 return cu
->producer_is_gxx_lt_4_6
;
9689 /* Return the default accessibility type if it is not overriden by
9690 DW_AT_accessibility. */
9692 static enum dwarf_access_attribute
9693 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
9695 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
9697 /* The default DWARF 2 accessibility for members is public, the default
9698 accessibility for inheritance is private. */
9700 if (die
->tag
!= DW_TAG_inheritance
)
9701 return DW_ACCESS_public
;
9703 return DW_ACCESS_private
;
9707 /* DWARF 3+ defines the default accessibility a different way. The same
9708 rules apply now for DW_TAG_inheritance as for the members and it only
9709 depends on the container kind. */
9711 if (die
->parent
->tag
== DW_TAG_class_type
)
9712 return DW_ACCESS_private
;
9714 return DW_ACCESS_public
;
9718 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
9719 offset. If the attribute was not found return 0, otherwise return
9720 1. If it was found but could not properly be handled, set *OFFSET
9724 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
9727 struct attribute
*attr
;
9729 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
9734 /* Note that we do not check for a section offset first here.
9735 This is because DW_AT_data_member_location is new in DWARF 4,
9736 so if we see it, we can assume that a constant form is really
9737 a constant and not a section offset. */
9738 if (attr_form_is_constant (attr
))
9739 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
9740 else if (attr_form_is_section_offset (attr
))
9741 dwarf2_complex_location_expr_complaint ();
9742 else if (attr_form_is_block (attr
))
9743 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
9745 dwarf2_complex_location_expr_complaint ();
9753 /* Add an aggregate field to the field list. */
9756 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
9757 struct dwarf2_cu
*cu
)
9759 struct objfile
*objfile
= cu
->objfile
;
9760 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9761 struct nextfield
*new_field
;
9762 struct attribute
*attr
;
9764 char *fieldname
= "";
9766 /* Allocate a new field list entry and link it in. */
9767 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
9768 make_cleanup (xfree
, new_field
);
9769 memset (new_field
, 0, sizeof (struct nextfield
));
9771 if (die
->tag
== DW_TAG_inheritance
)
9773 new_field
->next
= fip
->baseclasses
;
9774 fip
->baseclasses
= new_field
;
9778 new_field
->next
= fip
->fields
;
9779 fip
->fields
= new_field
;
9783 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
9785 new_field
->accessibility
= DW_UNSND (attr
);
9787 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
9788 if (new_field
->accessibility
!= DW_ACCESS_public
)
9789 fip
->non_public_fields
= 1;
9791 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
9793 new_field
->virtuality
= DW_UNSND (attr
);
9795 new_field
->virtuality
= DW_VIRTUALITY_none
;
9797 fp
= &new_field
->field
;
9799 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
9803 /* Data member other than a C++ static data member. */
9805 /* Get type of field. */
9806 fp
->type
= die_type (die
, cu
);
9808 SET_FIELD_BITPOS (*fp
, 0);
9810 /* Get bit size of field (zero if none). */
9811 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
9814 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
9818 FIELD_BITSIZE (*fp
) = 0;
9821 /* Get bit offset of field. */
9822 if (handle_data_member_location (die
, cu
, &offset
))
9823 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
9824 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
9827 if (gdbarch_bits_big_endian (gdbarch
))
9829 /* For big endian bits, the DW_AT_bit_offset gives the
9830 additional bit offset from the MSB of the containing
9831 anonymous object to the MSB of the field. We don't
9832 have to do anything special since we don't need to
9833 know the size of the anonymous object. */
9834 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
9838 /* For little endian bits, compute the bit offset to the
9839 MSB of the anonymous object, subtract off the number of
9840 bits from the MSB of the field to the MSB of the
9841 object, and then subtract off the number of bits of
9842 the field itself. The result is the bit offset of
9843 the LSB of the field. */
9845 int bit_offset
= DW_UNSND (attr
);
9847 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9850 /* The size of the anonymous object containing
9851 the bit field is explicit, so use the
9852 indicated size (in bytes). */
9853 anonymous_size
= DW_UNSND (attr
);
9857 /* The size of the anonymous object containing
9858 the bit field must be inferred from the type
9859 attribute of the data member containing the
9861 anonymous_size
= TYPE_LENGTH (fp
->type
);
9863 SET_FIELD_BITPOS (*fp
,
9865 + anonymous_size
* bits_per_byte
9866 - bit_offset
- FIELD_BITSIZE (*fp
)));
9870 /* Get name of field. */
9871 fieldname
= dwarf2_name (die
, cu
);
9872 if (fieldname
== NULL
)
9875 /* The name is already allocated along with this objfile, so we don't
9876 need to duplicate it for the type. */
9877 fp
->name
= fieldname
;
9879 /* Change accessibility for artificial fields (e.g. virtual table
9880 pointer or virtual base class pointer) to private. */
9881 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
9883 FIELD_ARTIFICIAL (*fp
) = 1;
9884 new_field
->accessibility
= DW_ACCESS_private
;
9885 fip
->non_public_fields
= 1;
9888 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
9890 /* C++ static member. */
9892 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
9893 is a declaration, but all versions of G++ as of this writing
9894 (so through at least 3.2.1) incorrectly generate
9895 DW_TAG_variable tags. */
9897 const char *physname
;
9899 /* Get name of field. */
9900 fieldname
= dwarf2_name (die
, cu
);
9901 if (fieldname
== NULL
)
9904 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
9906 /* Only create a symbol if this is an external value.
9907 new_symbol checks this and puts the value in the global symbol
9908 table, which we want. If it is not external, new_symbol
9909 will try to put the value in cu->list_in_scope which is wrong. */
9910 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
9912 /* A static const member, not much different than an enum as far as
9913 we're concerned, except that we can support more types. */
9914 new_symbol (die
, NULL
, cu
);
9917 /* Get physical name. */
9918 physname
= dwarf2_physname (fieldname
, die
, cu
);
9920 /* The name is already allocated along with this objfile, so we don't
9921 need to duplicate it for the type. */
9922 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
9923 FIELD_TYPE (*fp
) = die_type (die
, cu
);
9924 FIELD_NAME (*fp
) = fieldname
;
9926 else if (die
->tag
== DW_TAG_inheritance
)
9930 /* C++ base class field. */
9931 if (handle_data_member_location (die
, cu
, &offset
))
9932 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
9933 FIELD_BITSIZE (*fp
) = 0;
9934 FIELD_TYPE (*fp
) = die_type (die
, cu
);
9935 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
9936 fip
->nbaseclasses
++;
9940 /* Add a typedef defined in the scope of the FIP's class. */
9943 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
9944 struct dwarf2_cu
*cu
)
9946 struct objfile
*objfile
= cu
->objfile
;
9947 struct typedef_field_list
*new_field
;
9948 struct attribute
*attr
;
9949 struct typedef_field
*fp
;
9950 char *fieldname
= "";
9952 /* Allocate a new field list entry and link it in. */
9953 new_field
= xzalloc (sizeof (*new_field
));
9954 make_cleanup (xfree
, new_field
);
9956 gdb_assert (die
->tag
== DW_TAG_typedef
);
9958 fp
= &new_field
->field
;
9960 /* Get name of field. */
9961 fp
->name
= dwarf2_name (die
, cu
);
9962 if (fp
->name
== NULL
)
9965 fp
->type
= read_type_die (die
, cu
);
9967 new_field
->next
= fip
->typedef_field_list
;
9968 fip
->typedef_field_list
= new_field
;
9969 fip
->typedef_field_list_count
++;
9972 /* Create the vector of fields, and attach it to the type. */
9975 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
9976 struct dwarf2_cu
*cu
)
9978 int nfields
= fip
->nfields
;
9980 /* Record the field count, allocate space for the array of fields,
9981 and create blank accessibility bitfields if necessary. */
9982 TYPE_NFIELDS (type
) = nfields
;
9983 TYPE_FIELDS (type
) = (struct field
*)
9984 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
9985 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
9987 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
9989 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9991 TYPE_FIELD_PRIVATE_BITS (type
) =
9992 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
9993 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
9995 TYPE_FIELD_PROTECTED_BITS (type
) =
9996 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
9997 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
9999 TYPE_FIELD_IGNORE_BITS (type
) =
10000 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10001 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10004 /* If the type has baseclasses, allocate and clear a bit vector for
10005 TYPE_FIELD_VIRTUAL_BITS. */
10006 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10008 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10009 unsigned char *pointer
;
10011 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10012 pointer
= TYPE_ALLOC (type
, num_bytes
);
10013 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10014 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10015 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10018 /* Copy the saved-up fields into the field vector. Start from the head of
10019 the list, adding to the tail of the field array, so that they end up in
10020 the same order in the array in which they were added to the list. */
10021 while (nfields
-- > 0)
10023 struct nextfield
*fieldp
;
10027 fieldp
= fip
->fields
;
10028 fip
->fields
= fieldp
->next
;
10032 fieldp
= fip
->baseclasses
;
10033 fip
->baseclasses
= fieldp
->next
;
10036 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10037 switch (fieldp
->accessibility
)
10039 case DW_ACCESS_private
:
10040 if (cu
->language
!= language_ada
)
10041 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10044 case DW_ACCESS_protected
:
10045 if (cu
->language
!= language_ada
)
10046 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10049 case DW_ACCESS_public
:
10053 /* Unknown accessibility. Complain and treat it as public. */
10055 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10056 fieldp
->accessibility
);
10060 if (nfields
< fip
->nbaseclasses
)
10062 switch (fieldp
->virtuality
)
10064 case DW_VIRTUALITY_virtual
:
10065 case DW_VIRTUALITY_pure_virtual
:
10066 if (cu
->language
== language_ada
)
10067 error (_("unexpected virtuality in component of Ada type"));
10068 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10075 /* Add a member function to the proper fieldlist. */
10078 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10079 struct type
*type
, struct dwarf2_cu
*cu
)
10081 struct objfile
*objfile
= cu
->objfile
;
10082 struct attribute
*attr
;
10083 struct fnfieldlist
*flp
;
10085 struct fn_field
*fnp
;
10087 struct nextfnfield
*new_fnfield
;
10088 struct type
*this_type
;
10089 enum dwarf_access_attribute accessibility
;
10091 if (cu
->language
== language_ada
)
10092 error (_("unexpected member function in Ada type"));
10094 /* Get name of member function. */
10095 fieldname
= dwarf2_name (die
, cu
);
10096 if (fieldname
== NULL
)
10099 /* Look up member function name in fieldlist. */
10100 for (i
= 0; i
< fip
->nfnfields
; i
++)
10102 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10106 /* Create new list element if necessary. */
10107 if (i
< fip
->nfnfields
)
10108 flp
= &fip
->fnfieldlists
[i
];
10111 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10113 fip
->fnfieldlists
= (struct fnfieldlist
*)
10114 xrealloc (fip
->fnfieldlists
,
10115 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10116 * sizeof (struct fnfieldlist
));
10117 if (fip
->nfnfields
== 0)
10118 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10120 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10121 flp
->name
= fieldname
;
10124 i
= fip
->nfnfields
++;
10127 /* Create a new member function field and chain it to the field list
10129 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10130 make_cleanup (xfree
, new_fnfield
);
10131 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10132 new_fnfield
->next
= flp
->head
;
10133 flp
->head
= new_fnfield
;
10136 /* Fill in the member function field info. */
10137 fnp
= &new_fnfield
->fnfield
;
10139 /* Delay processing of the physname until later. */
10140 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10142 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10147 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10148 fnp
->physname
= physname
? physname
: "";
10151 fnp
->type
= alloc_type (objfile
);
10152 this_type
= read_type_die (die
, cu
);
10153 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10155 int nparams
= TYPE_NFIELDS (this_type
);
10157 /* TYPE is the domain of this method, and THIS_TYPE is the type
10158 of the method itself (TYPE_CODE_METHOD). */
10159 smash_to_method_type (fnp
->type
, type
,
10160 TYPE_TARGET_TYPE (this_type
),
10161 TYPE_FIELDS (this_type
),
10162 TYPE_NFIELDS (this_type
),
10163 TYPE_VARARGS (this_type
));
10165 /* Handle static member functions.
10166 Dwarf2 has no clean way to discern C++ static and non-static
10167 member functions. G++ helps GDB by marking the first
10168 parameter for non-static member functions (which is the this
10169 pointer) as artificial. We obtain this information from
10170 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10171 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10172 fnp
->voffset
= VOFFSET_STATIC
;
10175 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10176 dwarf2_full_name (fieldname
, die
, cu
));
10178 /* Get fcontext from DW_AT_containing_type if present. */
10179 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10180 fnp
->fcontext
= die_containing_type (die
, cu
);
10182 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10183 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10185 /* Get accessibility. */
10186 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10188 accessibility
= DW_UNSND (attr
);
10190 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10191 switch (accessibility
)
10193 case DW_ACCESS_private
:
10194 fnp
->is_private
= 1;
10196 case DW_ACCESS_protected
:
10197 fnp
->is_protected
= 1;
10201 /* Check for artificial methods. */
10202 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
10203 if (attr
&& DW_UNSND (attr
) != 0)
10204 fnp
->is_artificial
= 1;
10206 /* Get index in virtual function table if it is a virtual member
10207 function. For older versions of GCC, this is an offset in the
10208 appropriate virtual table, as specified by DW_AT_containing_type.
10209 For everyone else, it is an expression to be evaluated relative
10210 to the object address. */
10212 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
10215 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
10217 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
10219 /* Old-style GCC. */
10220 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
10222 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10223 || (DW_BLOCK (attr
)->size
> 1
10224 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
10225 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
10227 struct dwarf_block blk
;
10230 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10232 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
10233 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
10234 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10235 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
10236 dwarf2_complex_location_expr_complaint ();
10238 fnp
->voffset
/= cu
->header
.addr_size
;
10242 dwarf2_complex_location_expr_complaint ();
10244 if (!fnp
->fcontext
)
10245 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
10247 else if (attr_form_is_section_offset (attr
))
10249 dwarf2_complex_location_expr_complaint ();
10253 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
10259 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10260 if (attr
&& DW_UNSND (attr
))
10262 /* GCC does this, as of 2008-08-25; PR debug/37237. */
10263 complaint (&symfile_complaints
,
10264 _("Member function \"%s\" (offset %d) is virtual "
10265 "but the vtable offset is not specified"),
10266 fieldname
, die
->offset
.sect_off
);
10267 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10268 TYPE_CPLUS_DYNAMIC (type
) = 1;
10273 /* Create the vector of member function fields, and attach it to the type. */
10276 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
10277 struct dwarf2_cu
*cu
)
10279 struct fnfieldlist
*flp
;
10282 if (cu
->language
== language_ada
)
10283 error (_("unexpected member functions in Ada type"));
10285 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10286 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
10287 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
10289 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
10291 struct nextfnfield
*nfp
= flp
->head
;
10292 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
10295 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
10296 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
10297 fn_flp
->fn_fields
= (struct fn_field
*)
10298 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
10299 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
10300 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
10303 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
10306 /* Returns non-zero if NAME is the name of a vtable member in CU's
10307 language, zero otherwise. */
10309 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
10311 static const char vptr
[] = "_vptr";
10312 static const char vtable
[] = "vtable";
10314 /* Look for the C++ and Java forms of the vtable. */
10315 if ((cu
->language
== language_java
10316 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
10317 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
10318 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
10324 /* GCC outputs unnamed structures that are really pointers to member
10325 functions, with the ABI-specified layout. If TYPE describes
10326 such a structure, smash it into a member function type.
10328 GCC shouldn't do this; it should just output pointer to member DIEs.
10329 This is GCC PR debug/28767. */
10332 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
10334 struct type
*pfn_type
, *domain_type
, *new_type
;
10336 /* Check for a structure with no name and two children. */
10337 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
10340 /* Check for __pfn and __delta members. */
10341 if (TYPE_FIELD_NAME (type
, 0) == NULL
10342 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
10343 || TYPE_FIELD_NAME (type
, 1) == NULL
10344 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
10347 /* Find the type of the method. */
10348 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
10349 if (pfn_type
== NULL
10350 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
10351 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
10354 /* Look for the "this" argument. */
10355 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
10356 if (TYPE_NFIELDS (pfn_type
) == 0
10357 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
10358 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
10361 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
10362 new_type
= alloc_type (objfile
);
10363 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
10364 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
10365 TYPE_VARARGS (pfn_type
));
10366 smash_to_methodptr_type (type
, new_type
);
10369 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
10373 producer_is_icc (struct dwarf2_cu
*cu
)
10375 if (!cu
->checked_producer
)
10376 check_producer (cu
);
10378 return cu
->producer_is_icc
;
10381 /* Called when we find the DIE that starts a structure or union scope
10382 (definition) to create a type for the structure or union. Fill in
10383 the type's name and general properties; the members will not be
10384 processed until process_structure_type.
10386 NOTE: we need to call these functions regardless of whether or not the
10387 DIE has a DW_AT_name attribute, since it might be an anonymous
10388 structure or union. This gets the type entered into our set of
10389 user defined types.
10391 However, if the structure is incomplete (an opaque struct/union)
10392 then suppress creating a symbol table entry for it since gdb only
10393 wants to find the one with the complete definition. Note that if
10394 it is complete, we just call new_symbol, which does it's own
10395 checking about whether the struct/union is anonymous or not (and
10396 suppresses creating a symbol table entry itself). */
10398 static struct type
*
10399 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10401 struct objfile
*objfile
= cu
->objfile
;
10403 struct attribute
*attr
;
10406 /* If the definition of this type lives in .debug_types, read that type.
10407 Don't follow DW_AT_specification though, that will take us back up
10408 the chain and we want to go down. */
10409 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
10412 struct dwarf2_cu
*type_cu
= cu
;
10413 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
10415 /* We could just recurse on read_structure_type, but we need to call
10416 get_die_type to ensure only one type for this DIE is created.
10417 This is important, for example, because for c++ classes we need
10418 TYPE_NAME set which is only done by new_symbol. Blech. */
10419 type
= read_type_die (type_die
, type_cu
);
10421 /* TYPE_CU may not be the same as CU.
10422 Ensure TYPE is recorded in CU's type_hash table. */
10423 return set_die_type (die
, type
, cu
);
10426 type
= alloc_type (objfile
);
10427 INIT_CPLUS_SPECIFIC (type
);
10429 name
= dwarf2_name (die
, cu
);
10432 if (cu
->language
== language_cplus
10433 || cu
->language
== language_java
)
10435 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
10437 /* dwarf2_full_name might have already finished building the DIE's
10438 type. If so, there is no need to continue. */
10439 if (get_die_type (die
, cu
) != NULL
)
10440 return get_die_type (die
, cu
);
10442 TYPE_TAG_NAME (type
) = full_name
;
10443 if (die
->tag
== DW_TAG_structure_type
10444 || die
->tag
== DW_TAG_class_type
)
10445 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
10449 /* The name is already allocated along with this objfile, so
10450 we don't need to duplicate it for the type. */
10451 TYPE_TAG_NAME (type
) = (char *) name
;
10452 if (die
->tag
== DW_TAG_class_type
)
10453 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
10457 if (die
->tag
== DW_TAG_structure_type
)
10459 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10461 else if (die
->tag
== DW_TAG_union_type
)
10463 TYPE_CODE (type
) = TYPE_CODE_UNION
;
10467 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
10470 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
10471 TYPE_DECLARED_CLASS (type
) = 1;
10473 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10476 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10480 TYPE_LENGTH (type
) = 0;
10483 if (producer_is_icc (cu
))
10485 /* ICC does not output the required DW_AT_declaration
10486 on incomplete types, but gives them a size of zero. */
10489 TYPE_STUB_SUPPORTED (type
) = 1;
10491 if (die_is_declaration (die
, cu
))
10492 TYPE_STUB (type
) = 1;
10493 else if (attr
== NULL
&& die
->child
== NULL
10494 && producer_is_realview (cu
->producer
))
10495 /* RealView does not output the required DW_AT_declaration
10496 on incomplete types. */
10497 TYPE_STUB (type
) = 1;
10499 /* We need to add the type field to the die immediately so we don't
10500 infinitely recurse when dealing with pointers to the structure
10501 type within the structure itself. */
10502 set_die_type (die
, type
, cu
);
10504 /* set_die_type should be already done. */
10505 set_descriptive_type (type
, die
, cu
);
10510 /* Finish creating a structure or union type, including filling in
10511 its members and creating a symbol for it. */
10514 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10516 struct objfile
*objfile
= cu
->objfile
;
10517 struct die_info
*child_die
= die
->child
;
10520 type
= get_die_type (die
, cu
);
10522 type
= read_structure_type (die
, cu
);
10524 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
10526 struct field_info fi
;
10527 struct die_info
*child_die
;
10528 VEC (symbolp
) *template_args
= NULL
;
10529 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
10531 memset (&fi
, 0, sizeof (struct field_info
));
10533 child_die
= die
->child
;
10535 while (child_die
&& child_die
->tag
)
10537 if (child_die
->tag
== DW_TAG_member
10538 || child_die
->tag
== DW_TAG_variable
)
10540 /* NOTE: carlton/2002-11-05: A C++ static data member
10541 should be a DW_TAG_member that is a declaration, but
10542 all versions of G++ as of this writing (so through at
10543 least 3.2.1) incorrectly generate DW_TAG_variable
10544 tags for them instead. */
10545 dwarf2_add_field (&fi
, child_die
, cu
);
10547 else if (child_die
->tag
== DW_TAG_subprogram
)
10549 /* C++ member function. */
10550 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
10552 else if (child_die
->tag
== DW_TAG_inheritance
)
10554 /* C++ base class field. */
10555 dwarf2_add_field (&fi
, child_die
, cu
);
10557 else if (child_die
->tag
== DW_TAG_typedef
)
10558 dwarf2_add_typedef (&fi
, child_die
, cu
);
10559 else if (child_die
->tag
== DW_TAG_template_type_param
10560 || child_die
->tag
== DW_TAG_template_value_param
)
10562 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
10565 VEC_safe_push (symbolp
, template_args
, arg
);
10568 child_die
= sibling_die (child_die
);
10571 /* Attach template arguments to type. */
10572 if (! VEC_empty (symbolp
, template_args
))
10574 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10575 TYPE_N_TEMPLATE_ARGUMENTS (type
)
10576 = VEC_length (symbolp
, template_args
);
10577 TYPE_TEMPLATE_ARGUMENTS (type
)
10578 = obstack_alloc (&objfile
->objfile_obstack
,
10579 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
10580 * sizeof (struct symbol
*)));
10581 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
10582 VEC_address (symbolp
, template_args
),
10583 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
10584 * sizeof (struct symbol
*)));
10585 VEC_free (symbolp
, template_args
);
10588 /* Attach fields and member functions to the type. */
10590 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
10593 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
10595 /* Get the type which refers to the base class (possibly this
10596 class itself) which contains the vtable pointer for the current
10597 class from the DW_AT_containing_type attribute. This use of
10598 DW_AT_containing_type is a GNU extension. */
10600 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10602 struct type
*t
= die_containing_type (die
, cu
);
10604 TYPE_VPTR_BASETYPE (type
) = t
;
10609 /* Our own class provides vtbl ptr. */
10610 for (i
= TYPE_NFIELDS (t
) - 1;
10611 i
>= TYPE_N_BASECLASSES (t
);
10614 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
10616 if (is_vtable_name (fieldname
, cu
))
10618 TYPE_VPTR_FIELDNO (type
) = i
;
10623 /* Complain if virtual function table field not found. */
10624 if (i
< TYPE_N_BASECLASSES (t
))
10625 complaint (&symfile_complaints
,
10626 _("virtual function table pointer "
10627 "not found when defining class '%s'"),
10628 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
10633 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
10636 else if (cu
->producer
10637 && strncmp (cu
->producer
,
10638 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
10640 /* The IBM XLC compiler does not provide direct indication
10641 of the containing type, but the vtable pointer is
10642 always named __vfp. */
10646 for (i
= TYPE_NFIELDS (type
) - 1;
10647 i
>= TYPE_N_BASECLASSES (type
);
10650 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
10652 TYPE_VPTR_FIELDNO (type
) = i
;
10653 TYPE_VPTR_BASETYPE (type
) = type
;
10660 /* Copy fi.typedef_field_list linked list elements content into the
10661 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
10662 if (fi
.typedef_field_list
)
10664 int i
= fi
.typedef_field_list_count
;
10666 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10667 TYPE_TYPEDEF_FIELD_ARRAY (type
)
10668 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
10669 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
10671 /* Reverse the list order to keep the debug info elements order. */
10674 struct typedef_field
*dest
, *src
;
10676 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
10677 src
= &fi
.typedef_field_list
->field
;
10678 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
10683 do_cleanups (back_to
);
10685 if (HAVE_CPLUS_STRUCT (type
))
10686 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
10689 quirk_gcc_member_function_pointer (type
, objfile
);
10691 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
10692 snapshots) has been known to create a die giving a declaration
10693 for a class that has, as a child, a die giving a definition for a
10694 nested class. So we have to process our children even if the
10695 current die is a declaration. Normally, of course, a declaration
10696 won't have any children at all. */
10698 while (child_die
!= NULL
&& child_die
->tag
)
10700 if (child_die
->tag
== DW_TAG_member
10701 || child_die
->tag
== DW_TAG_variable
10702 || child_die
->tag
== DW_TAG_inheritance
10703 || child_die
->tag
== DW_TAG_template_value_param
10704 || child_die
->tag
== DW_TAG_template_type_param
)
10709 process_die (child_die
, cu
);
10711 child_die
= sibling_die (child_die
);
10714 /* Do not consider external references. According to the DWARF standard,
10715 these DIEs are identified by the fact that they have no byte_size
10716 attribute, and a declaration attribute. */
10717 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
10718 || !die_is_declaration (die
, cu
))
10719 new_symbol (die
, type
, cu
);
10722 /* Given a DW_AT_enumeration_type die, set its type. We do not
10723 complete the type's fields yet, or create any symbols. */
10725 static struct type
*
10726 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10728 struct objfile
*objfile
= cu
->objfile
;
10730 struct attribute
*attr
;
10733 /* If the definition of this type lives in .debug_types, read that type.
10734 Don't follow DW_AT_specification though, that will take us back up
10735 the chain and we want to go down. */
10736 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
10739 struct dwarf2_cu
*type_cu
= cu
;
10740 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
10742 type
= read_type_die (type_die
, type_cu
);
10744 /* TYPE_CU may not be the same as CU.
10745 Ensure TYPE is recorded in CU's type_hash table. */
10746 return set_die_type (die
, type
, cu
);
10749 type
= alloc_type (objfile
);
10751 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
10752 name
= dwarf2_full_name (NULL
, die
, cu
);
10754 TYPE_TAG_NAME (type
) = (char *) name
;
10756 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10759 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10763 TYPE_LENGTH (type
) = 0;
10766 /* The enumeration DIE can be incomplete. In Ada, any type can be
10767 declared as private in the package spec, and then defined only
10768 inside the package body. Such types are known as Taft Amendment
10769 Types. When another package uses such a type, an incomplete DIE
10770 may be generated by the compiler. */
10771 if (die_is_declaration (die
, cu
))
10772 TYPE_STUB (type
) = 1;
10774 return set_die_type (die
, type
, cu
);
10777 /* Given a pointer to a die which begins an enumeration, process all
10778 the dies that define the members of the enumeration, and create the
10779 symbol for the enumeration type.
10781 NOTE: We reverse the order of the element list. */
10784 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10786 struct type
*this_type
;
10788 this_type
= get_die_type (die
, cu
);
10789 if (this_type
== NULL
)
10790 this_type
= read_enumeration_type (die
, cu
);
10792 if (die
->child
!= NULL
)
10794 struct die_info
*child_die
;
10795 struct symbol
*sym
;
10796 struct field
*fields
= NULL
;
10797 int num_fields
= 0;
10798 int unsigned_enum
= 1;
10803 child_die
= die
->child
;
10804 while (child_die
&& child_die
->tag
)
10806 if (child_die
->tag
!= DW_TAG_enumerator
)
10808 process_die (child_die
, cu
);
10812 name
= dwarf2_name (child_die
, cu
);
10815 sym
= new_symbol (child_die
, this_type
, cu
);
10816 if (SYMBOL_VALUE (sym
) < 0)
10821 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
10824 mask
|= SYMBOL_VALUE (sym
);
10826 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10828 fields
= (struct field
*)
10830 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
10831 * sizeof (struct field
));
10834 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
10835 FIELD_TYPE (fields
[num_fields
]) = NULL
;
10836 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
10837 FIELD_BITSIZE (fields
[num_fields
]) = 0;
10843 child_die
= sibling_die (child_die
);
10848 TYPE_NFIELDS (this_type
) = num_fields
;
10849 TYPE_FIELDS (this_type
) = (struct field
*)
10850 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
10851 memcpy (TYPE_FIELDS (this_type
), fields
,
10852 sizeof (struct field
) * num_fields
);
10856 TYPE_UNSIGNED (this_type
) = 1;
10858 TYPE_FLAG_ENUM (this_type
) = 1;
10861 /* If we are reading an enum from a .debug_types unit, and the enum
10862 is a declaration, and the enum is not the signatured type in the
10863 unit, then we do not want to add a symbol for it. Adding a
10864 symbol would in some cases obscure the true definition of the
10865 enum, giving users an incomplete type when the definition is
10866 actually available. Note that we do not want to do this for all
10867 enums which are just declarations, because C++0x allows forward
10868 enum declarations. */
10869 if (cu
->per_cu
->is_debug_types
10870 && die_is_declaration (die
, cu
))
10872 struct signatured_type
*sig_type
;
10875 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
10876 cu
->per_cu
->info_or_types_section
,
10877 cu
->per_cu
->offset
);
10878 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
10879 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
10883 new_symbol (die
, this_type
, cu
);
10886 /* Extract all information from a DW_TAG_array_type DIE and put it in
10887 the DIE's type field. For now, this only handles one dimensional
10890 static struct type
*
10891 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10893 struct objfile
*objfile
= cu
->objfile
;
10894 struct die_info
*child_die
;
10896 struct type
*element_type
, *range_type
, *index_type
;
10897 struct type
**range_types
= NULL
;
10898 struct attribute
*attr
;
10900 struct cleanup
*back_to
;
10903 element_type
= die_type (die
, cu
);
10905 /* The die_type call above may have already set the type for this DIE. */
10906 type
= get_die_type (die
, cu
);
10910 /* Irix 6.2 native cc creates array types without children for
10911 arrays with unspecified length. */
10912 if (die
->child
== NULL
)
10914 index_type
= objfile_type (objfile
)->builtin_int
;
10915 range_type
= create_range_type (NULL
, index_type
, 0, -1);
10916 type
= create_array_type (NULL
, element_type
, range_type
);
10917 return set_die_type (die
, type
, cu
);
10920 back_to
= make_cleanup (null_cleanup
, NULL
);
10921 child_die
= die
->child
;
10922 while (child_die
&& child_die
->tag
)
10924 if (child_die
->tag
== DW_TAG_subrange_type
)
10926 struct type
*child_type
= read_type_die (child_die
, cu
);
10928 if (child_type
!= NULL
)
10930 /* The range type was succesfully read. Save it for the
10931 array type creation. */
10932 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
10934 range_types
= (struct type
**)
10935 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
10936 * sizeof (struct type
*));
10938 make_cleanup (free_current_contents
, &range_types
);
10940 range_types
[ndim
++] = child_type
;
10943 child_die
= sibling_die (child_die
);
10946 /* Dwarf2 dimensions are output from left to right, create the
10947 necessary array types in backwards order. */
10949 type
= element_type
;
10951 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
10956 type
= create_array_type (NULL
, type
, range_types
[i
++]);
10961 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
10964 /* Understand Dwarf2 support for vector types (like they occur on
10965 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
10966 array type. This is not part of the Dwarf2/3 standard yet, but a
10967 custom vendor extension. The main difference between a regular
10968 array and the vector variant is that vectors are passed by value
10970 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
10972 make_vector_type (type
);
10974 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
10975 implementation may choose to implement triple vectors using this
10977 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10980 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
10981 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10983 complaint (&symfile_complaints
,
10984 _("DW_AT_byte_size for array type smaller "
10985 "than the total size of elements"));
10988 name
= dwarf2_name (die
, cu
);
10990 TYPE_NAME (type
) = name
;
10992 /* Install the type in the die. */
10993 set_die_type (die
, type
, cu
);
10995 /* set_die_type should be already done. */
10996 set_descriptive_type (type
, die
, cu
);
10998 do_cleanups (back_to
);
11003 static enum dwarf_array_dim_ordering
11004 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11006 struct attribute
*attr
;
11008 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11010 if (attr
) return DW_SND (attr
);
11012 /* GNU F77 is a special case, as at 08/2004 array type info is the
11013 opposite order to the dwarf2 specification, but data is still
11014 laid out as per normal fortran.
11016 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11017 version checking. */
11019 if (cu
->language
== language_fortran
11020 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11022 return DW_ORD_row_major
;
11025 switch (cu
->language_defn
->la_array_ordering
)
11027 case array_column_major
:
11028 return DW_ORD_col_major
;
11029 case array_row_major
:
11031 return DW_ORD_row_major
;
11035 /* Extract all information from a DW_TAG_set_type DIE and put it in
11036 the DIE's type field. */
11038 static struct type
*
11039 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11041 struct type
*domain_type
, *set_type
;
11042 struct attribute
*attr
;
11044 domain_type
= die_type (die
, cu
);
11046 /* The die_type call above may have already set the type for this DIE. */
11047 set_type
= get_die_type (die
, cu
);
11051 set_type
= create_set_type (NULL
, domain_type
);
11053 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11055 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11057 return set_die_type (die
, set_type
, cu
);
11060 /* First cut: install each common block member as a global variable. */
11063 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11065 struct die_info
*child_die
;
11066 struct attribute
*attr
;
11067 struct symbol
*sym
;
11068 CORE_ADDR base
= (CORE_ADDR
) 0;
11070 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11073 /* Support the .debug_loc offsets. */
11074 if (attr_form_is_block (attr
))
11076 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
11078 else if (attr_form_is_section_offset (attr
))
11080 dwarf2_complex_location_expr_complaint ();
11084 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11085 "common block member");
11088 if (die
->child
!= NULL
)
11090 child_die
= die
->child
;
11091 while (child_die
&& child_die
->tag
)
11095 sym
= new_symbol (child_die
, NULL
, cu
);
11097 && handle_data_member_location (child_die
, cu
, &offset
))
11099 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
11100 add_symbol_to_list (sym
, &global_symbols
);
11102 child_die
= sibling_die (child_die
);
11107 /* Create a type for a C++ namespace. */
11109 static struct type
*
11110 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11112 struct objfile
*objfile
= cu
->objfile
;
11113 const char *previous_prefix
, *name
;
11117 /* For extensions, reuse the type of the original namespace. */
11118 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
11120 struct die_info
*ext_die
;
11121 struct dwarf2_cu
*ext_cu
= cu
;
11123 ext_die
= dwarf2_extension (die
, &ext_cu
);
11124 type
= read_type_die (ext_die
, ext_cu
);
11126 /* EXT_CU may not be the same as CU.
11127 Ensure TYPE is recorded in CU's type_hash table. */
11128 return set_die_type (die
, type
, cu
);
11131 name
= namespace_name (die
, &is_anonymous
, cu
);
11133 /* Now build the name of the current namespace. */
11135 previous_prefix
= determine_prefix (die
, cu
);
11136 if (previous_prefix
[0] != '\0')
11137 name
= typename_concat (&objfile
->objfile_obstack
,
11138 previous_prefix
, name
, 0, cu
);
11140 /* Create the type. */
11141 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
11143 TYPE_NAME (type
) = (char *) name
;
11144 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
11146 return set_die_type (die
, type
, cu
);
11149 /* Read a C++ namespace. */
11152 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
11154 struct objfile
*objfile
= cu
->objfile
;
11157 /* Add a symbol associated to this if we haven't seen the namespace
11158 before. Also, add a using directive if it's an anonymous
11161 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
11165 type
= read_type_die (die
, cu
);
11166 new_symbol (die
, type
, cu
);
11168 namespace_name (die
, &is_anonymous
, cu
);
11171 const char *previous_prefix
= determine_prefix (die
, cu
);
11173 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
11174 NULL
, NULL
, &objfile
->objfile_obstack
);
11178 if (die
->child
!= NULL
)
11180 struct die_info
*child_die
= die
->child
;
11182 while (child_die
&& child_die
->tag
)
11184 process_die (child_die
, cu
);
11185 child_die
= sibling_die (child_die
);
11190 /* Read a Fortran module as type. This DIE can be only a declaration used for
11191 imported module. Still we need that type as local Fortran "use ... only"
11192 declaration imports depend on the created type in determine_prefix. */
11194 static struct type
*
11195 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11197 struct objfile
*objfile
= cu
->objfile
;
11201 module_name
= dwarf2_name (die
, cu
);
11203 complaint (&symfile_complaints
,
11204 _("DW_TAG_module has no name, offset 0x%x"),
11205 die
->offset
.sect_off
);
11206 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
11208 /* determine_prefix uses TYPE_TAG_NAME. */
11209 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
11211 return set_die_type (die
, type
, cu
);
11214 /* Read a Fortran module. */
11217 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
11219 struct die_info
*child_die
= die
->child
;
11221 while (child_die
&& child_die
->tag
)
11223 process_die (child_die
, cu
);
11224 child_die
= sibling_die (child_die
);
11228 /* Return the name of the namespace represented by DIE. Set
11229 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
11232 static const char *
11233 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
11235 struct die_info
*current_die
;
11236 const char *name
= NULL
;
11238 /* Loop through the extensions until we find a name. */
11240 for (current_die
= die
;
11241 current_die
!= NULL
;
11242 current_die
= dwarf2_extension (die
, &cu
))
11244 name
= dwarf2_name (current_die
, cu
);
11249 /* Is it an anonymous namespace? */
11251 *is_anonymous
= (name
== NULL
);
11253 name
= CP_ANONYMOUS_NAMESPACE_STR
;
11258 /* Extract all information from a DW_TAG_pointer_type DIE and add to
11259 the user defined type vector. */
11261 static struct type
*
11262 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11264 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
11265 struct comp_unit_head
*cu_header
= &cu
->header
;
11267 struct attribute
*attr_byte_size
;
11268 struct attribute
*attr_address_class
;
11269 int byte_size
, addr_class
;
11270 struct type
*target_type
;
11272 target_type
= die_type (die
, cu
);
11274 /* The die_type call above may have already set the type for this DIE. */
11275 type
= get_die_type (die
, cu
);
11279 type
= lookup_pointer_type (target_type
);
11281 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11282 if (attr_byte_size
)
11283 byte_size
= DW_UNSND (attr_byte_size
);
11285 byte_size
= cu_header
->addr_size
;
11287 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
11288 if (attr_address_class
)
11289 addr_class
= DW_UNSND (attr_address_class
);
11291 addr_class
= DW_ADDR_none
;
11293 /* If the pointer size or address class is different than the
11294 default, create a type variant marked as such and set the
11295 length accordingly. */
11296 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
11298 if (gdbarch_address_class_type_flags_p (gdbarch
))
11302 type_flags
= gdbarch_address_class_type_flags
11303 (gdbarch
, byte_size
, addr_class
);
11304 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
11306 type
= make_type_with_address_space (type
, type_flags
);
11308 else if (TYPE_LENGTH (type
) != byte_size
)
11310 complaint (&symfile_complaints
,
11311 _("invalid pointer size %d"), byte_size
);
11315 /* Should we also complain about unhandled address classes? */
11319 TYPE_LENGTH (type
) = byte_size
;
11320 return set_die_type (die
, type
, cu
);
11323 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
11324 the user defined type vector. */
11326 static struct type
*
11327 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11330 struct type
*to_type
;
11331 struct type
*domain
;
11333 to_type
= die_type (die
, cu
);
11334 domain
= die_containing_type (die
, cu
);
11336 /* The calls above may have already set the type for this DIE. */
11337 type
= get_die_type (die
, cu
);
11341 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
11342 type
= lookup_methodptr_type (to_type
);
11344 type
= lookup_memberptr_type (to_type
, domain
);
11346 return set_die_type (die
, type
, cu
);
11349 /* Extract all information from a DW_TAG_reference_type DIE and add to
11350 the user defined type vector. */
11352 static struct type
*
11353 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11355 struct comp_unit_head
*cu_header
= &cu
->header
;
11356 struct type
*type
, *target_type
;
11357 struct attribute
*attr
;
11359 target_type
= die_type (die
, cu
);
11361 /* The die_type call above may have already set the type for this DIE. */
11362 type
= get_die_type (die
, cu
);
11366 type
= lookup_reference_type (target_type
);
11367 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11370 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11374 TYPE_LENGTH (type
) = cu_header
->addr_size
;
11376 return set_die_type (die
, type
, cu
);
11379 static struct type
*
11380 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11382 struct type
*base_type
, *cv_type
;
11384 base_type
= die_type (die
, cu
);
11386 /* The die_type call above may have already set the type for this DIE. */
11387 cv_type
= get_die_type (die
, cu
);
11391 /* In case the const qualifier is applied to an array type, the element type
11392 is so qualified, not the array type (section 6.7.3 of C99). */
11393 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
11395 struct type
*el_type
, *inner_array
;
11397 base_type
= copy_type (base_type
);
11398 inner_array
= base_type
;
11400 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
11402 TYPE_TARGET_TYPE (inner_array
) =
11403 copy_type (TYPE_TARGET_TYPE (inner_array
));
11404 inner_array
= TYPE_TARGET_TYPE (inner_array
);
11407 el_type
= TYPE_TARGET_TYPE (inner_array
);
11408 TYPE_TARGET_TYPE (inner_array
) =
11409 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
11411 return set_die_type (die
, base_type
, cu
);
11414 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
11415 return set_die_type (die
, cv_type
, cu
);
11418 static struct type
*
11419 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11421 struct type
*base_type
, *cv_type
;
11423 base_type
= die_type (die
, cu
);
11425 /* The die_type call above may have already set the type for this DIE. */
11426 cv_type
= get_die_type (die
, cu
);
11430 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
11431 return set_die_type (die
, cv_type
, cu
);
11434 /* Extract all information from a DW_TAG_string_type DIE and add to
11435 the user defined type vector. It isn't really a user defined type,
11436 but it behaves like one, with other DIE's using an AT_user_def_type
11437 attribute to reference it. */
11439 static struct type
*
11440 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11442 struct objfile
*objfile
= cu
->objfile
;
11443 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11444 struct type
*type
, *range_type
, *index_type
, *char_type
;
11445 struct attribute
*attr
;
11446 unsigned int length
;
11448 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
11451 length
= DW_UNSND (attr
);
11455 /* Check for the DW_AT_byte_size attribute. */
11456 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11459 length
= DW_UNSND (attr
);
11467 index_type
= objfile_type (objfile
)->builtin_int
;
11468 range_type
= create_range_type (NULL
, index_type
, 1, length
);
11469 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
11470 type
= create_string_type (NULL
, char_type
, range_type
);
11472 return set_die_type (die
, type
, cu
);
11475 /* Handle DIES due to C code like:
11479 int (*funcp)(int a, long l);
11483 ('funcp' generates a DW_TAG_subroutine_type DIE). */
11485 static struct type
*
11486 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11488 struct objfile
*objfile
= cu
->objfile
;
11489 struct type
*type
; /* Type that this function returns. */
11490 struct type
*ftype
; /* Function that returns above type. */
11491 struct attribute
*attr
;
11493 type
= die_type (die
, cu
);
11495 /* The die_type call above may have already set the type for this DIE. */
11496 ftype
= get_die_type (die
, cu
);
11500 ftype
= lookup_function_type (type
);
11502 /* All functions in C++, Pascal and Java have prototypes. */
11503 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
11504 if ((attr
&& (DW_UNSND (attr
) != 0))
11505 || cu
->language
== language_cplus
11506 || cu
->language
== language_java
11507 || cu
->language
== language_pascal
)
11508 TYPE_PROTOTYPED (ftype
) = 1;
11509 else if (producer_is_realview (cu
->producer
))
11510 /* RealView does not emit DW_AT_prototyped. We can not
11511 distinguish prototyped and unprototyped functions; default to
11512 prototyped, since that is more common in modern code (and
11513 RealView warns about unprototyped functions). */
11514 TYPE_PROTOTYPED (ftype
) = 1;
11516 /* Store the calling convention in the type if it's available in
11517 the subroutine die. Otherwise set the calling convention to
11518 the default value DW_CC_normal. */
11519 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
11521 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
11522 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
11523 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
11525 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
11527 /* We need to add the subroutine type to the die immediately so
11528 we don't infinitely recurse when dealing with parameters
11529 declared as the same subroutine type. */
11530 set_die_type (die
, ftype
, cu
);
11532 if (die
->child
!= NULL
)
11534 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
11535 struct die_info
*child_die
;
11536 int nparams
, iparams
;
11538 /* Count the number of parameters.
11539 FIXME: GDB currently ignores vararg functions, but knows about
11540 vararg member functions. */
11542 child_die
= die
->child
;
11543 while (child_die
&& child_die
->tag
)
11545 if (child_die
->tag
== DW_TAG_formal_parameter
)
11547 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
11548 TYPE_VARARGS (ftype
) = 1;
11549 child_die
= sibling_die (child_die
);
11552 /* Allocate storage for parameters and fill them in. */
11553 TYPE_NFIELDS (ftype
) = nparams
;
11554 TYPE_FIELDS (ftype
) = (struct field
*)
11555 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
11557 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
11558 even if we error out during the parameters reading below. */
11559 for (iparams
= 0; iparams
< nparams
; iparams
++)
11560 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
11563 child_die
= die
->child
;
11564 while (child_die
&& child_die
->tag
)
11566 if (child_die
->tag
== DW_TAG_formal_parameter
)
11568 struct type
*arg_type
;
11570 /* DWARF version 2 has no clean way to discern C++
11571 static and non-static member functions. G++ helps
11572 GDB by marking the first parameter for non-static
11573 member functions (which is the this pointer) as
11574 artificial. We pass this information to
11575 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
11577 DWARF version 3 added DW_AT_object_pointer, which GCC
11578 4.5 does not yet generate. */
11579 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
11581 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
11584 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
11586 /* GCC/43521: In java, the formal parameter
11587 "this" is sometimes not marked with DW_AT_artificial. */
11588 if (cu
->language
== language_java
)
11590 const char *name
= dwarf2_name (child_die
, cu
);
11592 if (name
&& !strcmp (name
, "this"))
11593 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
11596 arg_type
= die_type (child_die
, cu
);
11598 /* RealView does not mark THIS as const, which the testsuite
11599 expects. GCC marks THIS as const in method definitions,
11600 but not in the class specifications (GCC PR 43053). */
11601 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
11602 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
11605 struct dwarf2_cu
*arg_cu
= cu
;
11606 const char *name
= dwarf2_name (child_die
, cu
);
11608 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
11611 /* If the compiler emits this, use it. */
11612 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
11615 else if (name
&& strcmp (name
, "this") == 0)
11616 /* Function definitions will have the argument names. */
11618 else if (name
== NULL
&& iparams
== 0)
11619 /* Declarations may not have the names, so like
11620 elsewhere in GDB, assume an artificial first
11621 argument is "this". */
11625 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
11629 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
11632 child_die
= sibling_die (child_die
);
11639 static struct type
*
11640 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
11642 struct objfile
*objfile
= cu
->objfile
;
11643 const char *name
= NULL
;
11644 struct type
*this_type
, *target_type
;
11646 name
= dwarf2_full_name (NULL
, die
, cu
);
11647 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
11648 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
11649 TYPE_NAME (this_type
) = (char *) name
;
11650 set_die_type (die
, this_type
, cu
);
11651 target_type
= die_type (die
, cu
);
11652 if (target_type
!= this_type
)
11653 TYPE_TARGET_TYPE (this_type
) = target_type
;
11656 /* Self-referential typedefs are, it seems, not allowed by the DWARF
11657 spec and cause infinite loops in GDB. */
11658 complaint (&symfile_complaints
,
11659 _("Self-referential DW_TAG_typedef "
11660 "- DIE at 0x%x [in module %s]"),
11661 die
->offset
.sect_off
, objfile
->name
);
11662 TYPE_TARGET_TYPE (this_type
) = NULL
;
11667 /* Find a representation of a given base type and install
11668 it in the TYPE field of the die. */
11670 static struct type
*
11671 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11673 struct objfile
*objfile
= cu
->objfile
;
11675 struct attribute
*attr
;
11676 int encoding
= 0, size
= 0;
11678 enum type_code code
= TYPE_CODE_INT
;
11679 int type_flags
= 0;
11680 struct type
*target_type
= NULL
;
11682 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
11685 encoding
= DW_UNSND (attr
);
11687 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11690 size
= DW_UNSND (attr
);
11692 name
= dwarf2_name (die
, cu
);
11695 complaint (&symfile_complaints
,
11696 _("DW_AT_name missing from DW_TAG_base_type"));
11701 case DW_ATE_address
:
11702 /* Turn DW_ATE_address into a void * pointer. */
11703 code
= TYPE_CODE_PTR
;
11704 type_flags
|= TYPE_FLAG_UNSIGNED
;
11705 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
11707 case DW_ATE_boolean
:
11708 code
= TYPE_CODE_BOOL
;
11709 type_flags
|= TYPE_FLAG_UNSIGNED
;
11711 case DW_ATE_complex_float
:
11712 code
= TYPE_CODE_COMPLEX
;
11713 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
11715 case DW_ATE_decimal_float
:
11716 code
= TYPE_CODE_DECFLOAT
;
11719 code
= TYPE_CODE_FLT
;
11721 case DW_ATE_signed
:
11723 case DW_ATE_unsigned
:
11724 type_flags
|= TYPE_FLAG_UNSIGNED
;
11725 if (cu
->language
== language_fortran
11727 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
11728 code
= TYPE_CODE_CHAR
;
11730 case DW_ATE_signed_char
:
11731 if (cu
->language
== language_ada
|| cu
->language
== language_m2
11732 || cu
->language
== language_pascal
11733 || cu
->language
== language_fortran
)
11734 code
= TYPE_CODE_CHAR
;
11736 case DW_ATE_unsigned_char
:
11737 if (cu
->language
== language_ada
|| cu
->language
== language_m2
11738 || cu
->language
== language_pascal
11739 || cu
->language
== language_fortran
)
11740 code
= TYPE_CODE_CHAR
;
11741 type_flags
|= TYPE_FLAG_UNSIGNED
;
11744 /* We just treat this as an integer and then recognize the
11745 type by name elsewhere. */
11749 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
11750 dwarf_type_encoding_name (encoding
));
11754 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
11755 TYPE_NAME (type
) = name
;
11756 TYPE_TARGET_TYPE (type
) = target_type
;
11758 if (name
&& strcmp (name
, "char") == 0)
11759 TYPE_NOSIGN (type
) = 1;
11761 return set_die_type (die
, type
, cu
);
11764 /* Read the given DW_AT_subrange DIE. */
11766 static struct type
*
11767 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11769 struct type
*base_type
;
11770 struct type
*range_type
;
11771 struct attribute
*attr
;
11773 int low_default_is_valid
;
11775 LONGEST negative_mask
;
11777 base_type
= die_type (die
, cu
);
11778 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
11779 check_typedef (base_type
);
11781 /* The die_type call above may have already set the type for this DIE. */
11782 range_type
= get_die_type (die
, cu
);
11786 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
11787 omitting DW_AT_lower_bound. */
11788 switch (cu
->language
)
11791 case language_cplus
:
11793 low_default_is_valid
= 1;
11795 case language_fortran
:
11797 low_default_is_valid
= 1;
11800 case language_java
:
11801 case language_objc
:
11803 low_default_is_valid
= (cu
->header
.version
>= 4);
11807 case language_pascal
:
11809 low_default_is_valid
= (cu
->header
.version
>= 4);
11813 low_default_is_valid
= 0;
11817 /* FIXME: For variable sized arrays either of these could be
11818 a variable rather than a constant value. We'll allow it,
11819 but we don't know how to handle it. */
11820 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
11822 low
= dwarf2_get_attr_constant_value (attr
, low
);
11823 else if (!low_default_is_valid
)
11824 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
11825 "- DIE at 0x%x [in module %s]"),
11826 die
->offset
.sect_off
, cu
->objfile
->name
);
11828 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
11831 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
11833 /* GCC encodes arrays with unspecified or dynamic length
11834 with a DW_FORM_block1 attribute or a reference attribute.
11835 FIXME: GDB does not yet know how to handle dynamic
11836 arrays properly, treat them as arrays with unspecified
11839 FIXME: jimb/2003-09-22: GDB does not really know
11840 how to handle arrays of unspecified length
11841 either; we just represent them as zero-length
11842 arrays. Choose an appropriate upper bound given
11843 the lower bound we've computed above. */
11847 high
= dwarf2_get_attr_constant_value (attr
, 1);
11851 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
11854 int count
= dwarf2_get_attr_constant_value (attr
, 1);
11855 high
= low
+ count
- 1;
11859 /* Unspecified array length. */
11864 /* Dwarf-2 specifications explicitly allows to create subrange types
11865 without specifying a base type.
11866 In that case, the base type must be set to the type of
11867 the lower bound, upper bound or count, in that order, if any of these
11868 three attributes references an object that has a type.
11869 If no base type is found, the Dwarf-2 specifications say that
11870 a signed integer type of size equal to the size of an address should
11872 For the following C code: `extern char gdb_int [];'
11873 GCC produces an empty range DIE.
11874 FIXME: muller/2010-05-28: Possible references to object for low bound,
11875 high bound or count are not yet handled by this code. */
11876 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
11878 struct objfile
*objfile
= cu
->objfile
;
11879 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11880 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
11881 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
11883 /* Test "int", "long int", and "long long int" objfile types,
11884 and select the first one having a size above or equal to the
11885 architecture address size. */
11886 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11887 base_type
= int_type
;
11890 int_type
= objfile_type (objfile
)->builtin_long
;
11891 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11892 base_type
= int_type
;
11895 int_type
= objfile_type (objfile
)->builtin_long_long
;
11896 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11897 base_type
= int_type
;
11903 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
11904 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
11905 low
|= negative_mask
;
11906 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
11907 high
|= negative_mask
;
11909 range_type
= create_range_type (NULL
, base_type
, low
, high
);
11911 /* Mark arrays with dynamic length at least as an array of unspecified
11912 length. GDB could check the boundary but before it gets implemented at
11913 least allow accessing the array elements. */
11914 if (attr
&& attr_form_is_block (attr
))
11915 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
11917 /* Ada expects an empty array on no boundary attributes. */
11918 if (attr
== NULL
&& cu
->language
!= language_ada
)
11919 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
11921 name
= dwarf2_name (die
, cu
);
11923 TYPE_NAME (range_type
) = name
;
11925 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11927 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
11929 set_die_type (die
, range_type
, cu
);
11931 /* set_die_type should be already done. */
11932 set_descriptive_type (range_type
, die
, cu
);
11937 static struct type
*
11938 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11942 /* For now, we only support the C meaning of an unspecified type: void. */
11944 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
11945 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
11947 return set_die_type (die
, type
, cu
);
11950 /* Read a single die and all its descendents. Set the die's sibling
11951 field to NULL; set other fields in the die correctly, and set all
11952 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
11953 location of the info_ptr after reading all of those dies. PARENT
11954 is the parent of the die in question. */
11956 static struct die_info
*
11957 read_die_and_children (const struct die_reader_specs
*reader
,
11958 gdb_byte
*info_ptr
,
11959 gdb_byte
**new_info_ptr
,
11960 struct die_info
*parent
)
11962 struct die_info
*die
;
11966 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
11969 *new_info_ptr
= cur_ptr
;
11972 store_in_ref_table (die
, reader
->cu
);
11975 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
11979 *new_info_ptr
= cur_ptr
;
11982 die
->sibling
= NULL
;
11983 die
->parent
= parent
;
11987 /* Read a die, all of its descendents, and all of its siblings; set
11988 all of the fields of all of the dies correctly. Arguments are as
11989 in read_die_and_children. */
11991 static struct die_info
*
11992 read_die_and_siblings (const struct die_reader_specs
*reader
,
11993 gdb_byte
*info_ptr
,
11994 gdb_byte
**new_info_ptr
,
11995 struct die_info
*parent
)
11997 struct die_info
*first_die
, *last_sibling
;
12000 cur_ptr
= info_ptr
;
12001 first_die
= last_sibling
= NULL
;
12005 struct die_info
*die
12006 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12010 *new_info_ptr
= cur_ptr
;
12017 last_sibling
->sibling
= die
;
12019 last_sibling
= die
;
12023 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12025 The caller is responsible for filling in the extra attributes
12026 and updating (*DIEP)->num_attrs.
12027 Set DIEP to point to a newly allocated die with its information,
12028 except for its child, sibling, and parent fields.
12029 Set HAS_CHILDREN to tell whether the die has children or not. */
12032 read_full_die_1 (const struct die_reader_specs
*reader
,
12033 struct die_info
**diep
, gdb_byte
*info_ptr
,
12034 int *has_children
, int num_extra_attrs
)
12036 unsigned int abbrev_number
, bytes_read
, i
;
12037 sect_offset offset
;
12038 struct abbrev_info
*abbrev
;
12039 struct die_info
*die
;
12040 struct dwarf2_cu
*cu
= reader
->cu
;
12041 bfd
*abfd
= reader
->abfd
;
12043 offset
.sect_off
= info_ptr
- reader
->buffer
;
12044 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12045 info_ptr
+= bytes_read
;
12046 if (!abbrev_number
)
12053 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
12055 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
12057 bfd_get_filename (abfd
));
12059 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
12060 die
->offset
= offset
;
12061 die
->tag
= abbrev
->tag
;
12062 die
->abbrev
= abbrev_number
;
12064 /* Make the result usable.
12065 The caller needs to update num_attrs after adding the extra
12067 die
->num_attrs
= abbrev
->num_attrs
;
12069 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12070 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
12074 *has_children
= abbrev
->has_children
;
12078 /* Read a die and all its attributes.
12079 Set DIEP to point to a newly allocated die with its information,
12080 except for its child, sibling, and parent fields.
12081 Set HAS_CHILDREN to tell whether the die has children or not. */
12084 read_full_die (const struct die_reader_specs
*reader
,
12085 struct die_info
**diep
, gdb_byte
*info_ptr
,
12088 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
12091 /* Abbreviation tables.
12093 In DWARF version 2, the description of the debugging information is
12094 stored in a separate .debug_abbrev section. Before we read any
12095 dies from a section we read in all abbreviations and install them
12096 in a hash table. */
12098 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
12100 static struct abbrev_info
*
12101 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
12103 struct abbrev_info
*abbrev
;
12105 abbrev
= (struct abbrev_info
*)
12106 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
12107 memset (abbrev
, 0, sizeof (struct abbrev_info
));
12111 /* Add an abbreviation to the table. */
12114 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
12115 unsigned int abbrev_number
,
12116 struct abbrev_info
*abbrev
)
12118 unsigned int hash_number
;
12120 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12121 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
12122 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
12125 /* Look up an abbrev in the table.
12126 Returns NULL if the abbrev is not found. */
12128 static struct abbrev_info
*
12129 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
12130 unsigned int abbrev_number
)
12132 unsigned int hash_number
;
12133 struct abbrev_info
*abbrev
;
12135 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12136 abbrev
= abbrev_table
->abbrevs
[hash_number
];
12140 if (abbrev
->number
== abbrev_number
)
12142 abbrev
= abbrev
->next
;
12147 /* Read in an abbrev table. */
12149 static struct abbrev_table
*
12150 abbrev_table_read_table (struct dwarf2_section_info
*section
,
12151 sect_offset offset
)
12153 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12154 bfd
*abfd
= section
->asection
->owner
;
12155 struct abbrev_table
*abbrev_table
;
12156 gdb_byte
*abbrev_ptr
;
12157 struct abbrev_info
*cur_abbrev
;
12158 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
12159 unsigned int abbrev_form
;
12160 struct attr_abbrev
*cur_attrs
;
12161 unsigned int allocated_attrs
;
12163 abbrev_table
= XMALLOC (struct abbrev_table
);
12164 abbrev_table
->offset
= offset
;
12165 obstack_init (&abbrev_table
->abbrev_obstack
);
12166 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
12168 * sizeof (struct abbrev_info
*)));
12169 memset (abbrev_table
->abbrevs
, 0,
12170 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
12172 dwarf2_read_section (objfile
, section
);
12173 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
12174 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12175 abbrev_ptr
+= bytes_read
;
12177 allocated_attrs
= ATTR_ALLOC_CHUNK
;
12178 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
12180 /* Loop until we reach an abbrev number of 0. */
12181 while (abbrev_number
)
12183 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
12185 /* read in abbrev header */
12186 cur_abbrev
->number
= abbrev_number
;
12187 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12188 abbrev_ptr
+= bytes_read
;
12189 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
12192 /* now read in declarations */
12193 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12194 abbrev_ptr
+= bytes_read
;
12195 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12196 abbrev_ptr
+= bytes_read
;
12197 while (abbrev_name
)
12199 if (cur_abbrev
->num_attrs
== allocated_attrs
)
12201 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
12203 = xrealloc (cur_attrs
, (allocated_attrs
12204 * sizeof (struct attr_abbrev
)));
12207 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
12208 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
12209 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12210 abbrev_ptr
+= bytes_read
;
12211 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12212 abbrev_ptr
+= bytes_read
;
12215 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
12216 (cur_abbrev
->num_attrs
12217 * sizeof (struct attr_abbrev
)));
12218 memcpy (cur_abbrev
->attrs
, cur_attrs
,
12219 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
12221 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
12223 /* Get next abbreviation.
12224 Under Irix6 the abbreviations for a compilation unit are not
12225 always properly terminated with an abbrev number of 0.
12226 Exit loop if we encounter an abbreviation which we have
12227 already read (which means we are about to read the abbreviations
12228 for the next compile unit) or if the end of the abbreviation
12229 table is reached. */
12230 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
12232 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12233 abbrev_ptr
+= bytes_read
;
12234 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
12239 return abbrev_table
;
12242 /* Free the resources held by ABBREV_TABLE. */
12245 abbrev_table_free (struct abbrev_table
*abbrev_table
)
12247 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
12248 xfree (abbrev_table
);
12251 /* Same as abbrev_table_free but as a cleanup.
12252 We pass in a pointer to the pointer to the table so that we can
12253 set the pointer to NULL when we're done. It also simplifies
12254 build_type_unit_groups. */
12257 abbrev_table_free_cleanup (void *table_ptr
)
12259 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
12261 if (*abbrev_table_ptr
!= NULL
)
12262 abbrev_table_free (*abbrev_table_ptr
);
12263 *abbrev_table_ptr
= NULL
;
12266 /* Read the abbrev table for CU from ABBREV_SECTION. */
12269 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
12270 struct dwarf2_section_info
*abbrev_section
)
12273 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
12276 /* Release the memory used by the abbrev table for a compilation unit. */
12279 dwarf2_free_abbrev_table (void *ptr_to_cu
)
12281 struct dwarf2_cu
*cu
= ptr_to_cu
;
12283 abbrev_table_free (cu
->abbrev_table
);
12284 /* Set this to NULL so that we SEGV if we try to read it later,
12285 and also because free_comp_unit verifies this is NULL. */
12286 cu
->abbrev_table
= NULL
;
12289 /* Returns nonzero if TAG represents a type that we might generate a partial
12293 is_type_tag_for_partial (int tag
)
12298 /* Some types that would be reasonable to generate partial symbols for,
12299 that we don't at present. */
12300 case DW_TAG_array_type
:
12301 case DW_TAG_file_type
:
12302 case DW_TAG_ptr_to_member_type
:
12303 case DW_TAG_set_type
:
12304 case DW_TAG_string_type
:
12305 case DW_TAG_subroutine_type
:
12307 case DW_TAG_base_type
:
12308 case DW_TAG_class_type
:
12309 case DW_TAG_interface_type
:
12310 case DW_TAG_enumeration_type
:
12311 case DW_TAG_structure_type
:
12312 case DW_TAG_subrange_type
:
12313 case DW_TAG_typedef
:
12314 case DW_TAG_union_type
:
12321 /* Load all DIEs that are interesting for partial symbols into memory. */
12323 static struct partial_die_info
*
12324 load_partial_dies (const struct die_reader_specs
*reader
,
12325 gdb_byte
*info_ptr
, int building_psymtab
)
12327 struct dwarf2_cu
*cu
= reader
->cu
;
12328 struct objfile
*objfile
= cu
->objfile
;
12329 struct partial_die_info
*part_die
;
12330 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
12331 struct abbrev_info
*abbrev
;
12332 unsigned int bytes_read
;
12333 unsigned int load_all
= 0;
12334 int nesting_level
= 1;
12339 gdb_assert (cu
->per_cu
!= NULL
);
12340 if (cu
->per_cu
->load_all_dies
)
12344 = htab_create_alloc_ex (cu
->header
.length
/ 12,
12348 &cu
->comp_unit_obstack
,
12349 hashtab_obstack_allocate
,
12350 dummy_obstack_deallocate
);
12352 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
12353 sizeof (struct partial_die_info
));
12357 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
12359 /* A NULL abbrev means the end of a series of children. */
12360 if (abbrev
== NULL
)
12362 if (--nesting_level
== 0)
12364 /* PART_DIE was probably the last thing allocated on the
12365 comp_unit_obstack, so we could call obstack_free
12366 here. We don't do that because the waste is small,
12367 and will be cleaned up when we're done with this
12368 compilation unit. This way, we're also more robust
12369 against other users of the comp_unit_obstack. */
12372 info_ptr
+= bytes_read
;
12373 last_die
= parent_die
;
12374 parent_die
= parent_die
->die_parent
;
12378 /* Check for template arguments. We never save these; if
12379 they're seen, we just mark the parent, and go on our way. */
12380 if (parent_die
!= NULL
12381 && cu
->language
== language_cplus
12382 && (abbrev
->tag
== DW_TAG_template_type_param
12383 || abbrev
->tag
== DW_TAG_template_value_param
))
12385 parent_die
->has_template_arguments
= 1;
12389 /* We don't need a partial DIE for the template argument. */
12390 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12395 /* We only recurse into c++ subprograms looking for template arguments.
12396 Skip their other children. */
12398 && cu
->language
== language_cplus
12399 && parent_die
!= NULL
12400 && parent_die
->tag
== DW_TAG_subprogram
)
12402 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12406 /* Check whether this DIE is interesting enough to save. Normally
12407 we would not be interested in members here, but there may be
12408 later variables referencing them via DW_AT_specification (for
12409 static members). */
12411 && !is_type_tag_for_partial (abbrev
->tag
)
12412 && abbrev
->tag
!= DW_TAG_constant
12413 && abbrev
->tag
!= DW_TAG_enumerator
12414 && abbrev
->tag
!= DW_TAG_subprogram
12415 && abbrev
->tag
!= DW_TAG_lexical_block
12416 && abbrev
->tag
!= DW_TAG_variable
12417 && abbrev
->tag
!= DW_TAG_namespace
12418 && abbrev
->tag
!= DW_TAG_module
12419 && abbrev
->tag
!= DW_TAG_member
12420 && abbrev
->tag
!= DW_TAG_imported_unit
)
12422 /* Otherwise we skip to the next sibling, if any. */
12423 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12427 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
12430 /* This two-pass algorithm for processing partial symbols has a
12431 high cost in cache pressure. Thus, handle some simple cases
12432 here which cover the majority of C partial symbols. DIEs
12433 which neither have specification tags in them, nor could have
12434 specification tags elsewhere pointing at them, can simply be
12435 processed and discarded.
12437 This segment is also optional; scan_partial_symbols and
12438 add_partial_symbol will handle these DIEs if we chain
12439 them in normally. When compilers which do not emit large
12440 quantities of duplicate debug information are more common,
12441 this code can probably be removed. */
12443 /* Any complete simple types at the top level (pretty much all
12444 of them, for a language without namespaces), can be processed
12446 if (parent_die
== NULL
12447 && part_die
->has_specification
== 0
12448 && part_die
->is_declaration
== 0
12449 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
12450 || part_die
->tag
== DW_TAG_base_type
12451 || part_die
->tag
== DW_TAG_subrange_type
))
12453 if (building_psymtab
&& part_die
->name
!= NULL
)
12454 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
12455 VAR_DOMAIN
, LOC_TYPEDEF
,
12456 &objfile
->static_psymbols
,
12457 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
12458 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
12462 /* The exception for DW_TAG_typedef with has_children above is
12463 a workaround of GCC PR debug/47510. In the case of this complaint
12464 type_name_no_tag_or_error will error on such types later.
12466 GDB skipped children of DW_TAG_typedef by the shortcut above and then
12467 it could not find the child DIEs referenced later, this is checked
12468 above. In correct DWARF DW_TAG_typedef should have no children. */
12470 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
12471 complaint (&symfile_complaints
,
12472 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
12473 "- DIE at 0x%x [in module %s]"),
12474 part_die
->offset
.sect_off
, objfile
->name
);
12476 /* If we're at the second level, and we're an enumerator, and
12477 our parent has no specification (meaning possibly lives in a
12478 namespace elsewhere), then we can add the partial symbol now
12479 instead of queueing it. */
12480 if (part_die
->tag
== DW_TAG_enumerator
12481 && parent_die
!= NULL
12482 && parent_die
->die_parent
== NULL
12483 && parent_die
->tag
== DW_TAG_enumeration_type
12484 && parent_die
->has_specification
== 0)
12486 if (part_die
->name
== NULL
)
12487 complaint (&symfile_complaints
,
12488 _("malformed enumerator DIE ignored"));
12489 else if (building_psymtab
)
12490 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
12491 VAR_DOMAIN
, LOC_CONST
,
12492 (cu
->language
== language_cplus
12493 || cu
->language
== language_java
)
12494 ? &objfile
->global_psymbols
12495 : &objfile
->static_psymbols
,
12496 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
12498 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
12502 /* We'll save this DIE so link it in. */
12503 part_die
->die_parent
= parent_die
;
12504 part_die
->die_sibling
= NULL
;
12505 part_die
->die_child
= NULL
;
12507 if (last_die
&& last_die
== parent_die
)
12508 last_die
->die_child
= part_die
;
12510 last_die
->die_sibling
= part_die
;
12512 last_die
= part_die
;
12514 if (first_die
== NULL
)
12515 first_die
= part_die
;
12517 /* Maybe add the DIE to the hash table. Not all DIEs that we
12518 find interesting need to be in the hash table, because we
12519 also have the parent/sibling/child chains; only those that we
12520 might refer to by offset later during partial symbol reading.
12522 For now this means things that might have be the target of a
12523 DW_AT_specification, DW_AT_abstract_origin, or
12524 DW_AT_extension. DW_AT_extension will refer only to
12525 namespaces; DW_AT_abstract_origin refers to functions (and
12526 many things under the function DIE, but we do not recurse
12527 into function DIEs during partial symbol reading) and
12528 possibly variables as well; DW_AT_specification refers to
12529 declarations. Declarations ought to have the DW_AT_declaration
12530 flag. It happens that GCC forgets to put it in sometimes, but
12531 only for functions, not for types.
12533 Adding more things than necessary to the hash table is harmless
12534 except for the performance cost. Adding too few will result in
12535 wasted time in find_partial_die, when we reread the compilation
12536 unit with load_all_dies set. */
12539 || abbrev
->tag
== DW_TAG_constant
12540 || abbrev
->tag
== DW_TAG_subprogram
12541 || abbrev
->tag
== DW_TAG_variable
12542 || abbrev
->tag
== DW_TAG_namespace
12543 || part_die
->is_declaration
)
12547 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
12548 part_die
->offset
.sect_off
, INSERT
);
12552 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
12553 sizeof (struct partial_die_info
));
12555 /* For some DIEs we want to follow their children (if any). For C
12556 we have no reason to follow the children of structures; for other
12557 languages we have to, so that we can get at method physnames
12558 to infer fully qualified class names, for DW_AT_specification,
12559 and for C++ template arguments. For C++, we also look one level
12560 inside functions to find template arguments (if the name of the
12561 function does not already contain the template arguments).
12563 For Ada, we need to scan the children of subprograms and lexical
12564 blocks as well because Ada allows the definition of nested
12565 entities that could be interesting for the debugger, such as
12566 nested subprograms for instance. */
12567 if (last_die
->has_children
12569 || last_die
->tag
== DW_TAG_namespace
12570 || last_die
->tag
== DW_TAG_module
12571 || last_die
->tag
== DW_TAG_enumeration_type
12572 || (cu
->language
== language_cplus
12573 && last_die
->tag
== DW_TAG_subprogram
12574 && (last_die
->name
== NULL
12575 || strchr (last_die
->name
, '<') == NULL
))
12576 || (cu
->language
!= language_c
12577 && (last_die
->tag
== DW_TAG_class_type
12578 || last_die
->tag
== DW_TAG_interface_type
12579 || last_die
->tag
== DW_TAG_structure_type
12580 || last_die
->tag
== DW_TAG_union_type
))
12581 || (cu
->language
== language_ada
12582 && (last_die
->tag
== DW_TAG_subprogram
12583 || last_die
->tag
== DW_TAG_lexical_block
))))
12586 parent_die
= last_die
;
12590 /* Otherwise we skip to the next sibling, if any. */
12591 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
12593 /* Back to the top, do it again. */
12597 /* Read a minimal amount of information into the minimal die structure. */
12600 read_partial_die (const struct die_reader_specs
*reader
,
12601 struct partial_die_info
*part_die
,
12602 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
12603 gdb_byte
*info_ptr
)
12605 struct dwarf2_cu
*cu
= reader
->cu
;
12606 struct objfile
*objfile
= cu
->objfile
;
12607 gdb_byte
*buffer
= reader
->buffer
;
12609 struct attribute attr
;
12610 int has_low_pc_attr
= 0;
12611 int has_high_pc_attr
= 0;
12612 int high_pc_relative
= 0;
12614 memset (part_die
, 0, sizeof (struct partial_die_info
));
12616 part_die
->offset
.sect_off
= info_ptr
- buffer
;
12618 info_ptr
+= abbrev_len
;
12620 if (abbrev
== NULL
)
12623 part_die
->tag
= abbrev
->tag
;
12624 part_die
->has_children
= abbrev
->has_children
;
12626 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12628 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
12630 /* Store the data if it is of an attribute we want to keep in a
12631 partial symbol table. */
12635 switch (part_die
->tag
)
12637 case DW_TAG_compile_unit
:
12638 case DW_TAG_partial_unit
:
12639 case DW_TAG_type_unit
:
12640 /* Compilation units have a DW_AT_name that is a filename, not
12641 a source language identifier. */
12642 case DW_TAG_enumeration_type
:
12643 case DW_TAG_enumerator
:
12644 /* These tags always have simple identifiers already; no need
12645 to canonicalize them. */
12646 part_die
->name
= DW_STRING (&attr
);
12650 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
12651 &objfile
->objfile_obstack
);
12655 case DW_AT_linkage_name
:
12656 case DW_AT_MIPS_linkage_name
:
12657 /* Note that both forms of linkage name might appear. We
12658 assume they will be the same, and we only store the last
12660 if (cu
->language
== language_ada
)
12661 part_die
->name
= DW_STRING (&attr
);
12662 part_die
->linkage_name
= DW_STRING (&attr
);
12665 has_low_pc_attr
= 1;
12666 part_die
->lowpc
= DW_ADDR (&attr
);
12668 case DW_AT_high_pc
:
12669 has_high_pc_attr
= 1;
12670 if (attr
.form
== DW_FORM_addr
12671 || attr
.form
== DW_FORM_GNU_addr_index
)
12672 part_die
->highpc
= DW_ADDR (&attr
);
12675 high_pc_relative
= 1;
12676 part_die
->highpc
= DW_UNSND (&attr
);
12679 case DW_AT_location
:
12680 /* Support the .debug_loc offsets. */
12681 if (attr_form_is_block (&attr
))
12683 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
12685 else if (attr_form_is_section_offset (&attr
))
12687 dwarf2_complex_location_expr_complaint ();
12691 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
12692 "partial symbol information");
12695 case DW_AT_external
:
12696 part_die
->is_external
= DW_UNSND (&attr
);
12698 case DW_AT_declaration
:
12699 part_die
->is_declaration
= DW_UNSND (&attr
);
12702 part_die
->has_type
= 1;
12704 case DW_AT_abstract_origin
:
12705 case DW_AT_specification
:
12706 case DW_AT_extension
:
12707 part_die
->has_specification
= 1;
12708 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
12709 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
12710 || cu
->per_cu
->is_dwz
);
12712 case DW_AT_sibling
:
12713 /* Ignore absolute siblings, they might point outside of
12714 the current compile unit. */
12715 if (attr
.form
== DW_FORM_ref_addr
)
12716 complaint (&symfile_complaints
,
12717 _("ignoring absolute DW_AT_sibling"));
12719 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
12721 case DW_AT_byte_size
:
12722 part_die
->has_byte_size
= 1;
12724 case DW_AT_calling_convention
:
12725 /* DWARF doesn't provide a way to identify a program's source-level
12726 entry point. DW_AT_calling_convention attributes are only meant
12727 to describe functions' calling conventions.
12729 However, because it's a necessary piece of information in
12730 Fortran, and because DW_CC_program is the only piece of debugging
12731 information whose definition refers to a 'main program' at all,
12732 several compilers have begun marking Fortran main programs with
12733 DW_CC_program --- even when those functions use the standard
12734 calling conventions.
12736 So until DWARF specifies a way to provide this information and
12737 compilers pick up the new representation, we'll support this
12739 if (DW_UNSND (&attr
) == DW_CC_program
12740 && cu
->language
== language_fortran
)
12742 set_main_name (part_die
->name
);
12744 /* As this DIE has a static linkage the name would be difficult
12745 to look up later. */
12746 language_of_main
= language_fortran
;
12750 if (DW_UNSND (&attr
) == DW_INL_inlined
12751 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
12752 part_die
->may_be_inlined
= 1;
12756 if (part_die
->tag
== DW_TAG_imported_unit
)
12758 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
12759 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
12760 || cu
->per_cu
->is_dwz
);
12769 if (high_pc_relative
)
12770 part_die
->highpc
+= part_die
->lowpc
;
12772 if (has_low_pc_attr
&& has_high_pc_attr
)
12774 /* When using the GNU linker, .gnu.linkonce. sections are used to
12775 eliminate duplicate copies of functions and vtables and such.
12776 The linker will arbitrarily choose one and discard the others.
12777 The AT_*_pc values for such functions refer to local labels in
12778 these sections. If the section from that file was discarded, the
12779 labels are not in the output, so the relocs get a value of 0.
12780 If this is a discarded function, mark the pc bounds as invalid,
12781 so that GDB will ignore it. */
12782 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12784 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12786 complaint (&symfile_complaints
,
12787 _("DW_AT_low_pc %s is zero "
12788 "for DIE at 0x%x [in module %s]"),
12789 paddress (gdbarch
, part_die
->lowpc
),
12790 part_die
->offset
.sect_off
, objfile
->name
);
12792 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
12793 else if (part_die
->lowpc
>= part_die
->highpc
)
12795 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12797 complaint (&symfile_complaints
,
12798 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
12799 "for DIE at 0x%x [in module %s]"),
12800 paddress (gdbarch
, part_die
->lowpc
),
12801 paddress (gdbarch
, part_die
->highpc
),
12802 part_die
->offset
.sect_off
, objfile
->name
);
12805 part_die
->has_pc_info
= 1;
12811 /* Find a cached partial DIE at OFFSET in CU. */
12813 static struct partial_die_info
*
12814 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
12816 struct partial_die_info
*lookup_die
= NULL
;
12817 struct partial_die_info part_die
;
12819 part_die
.offset
= offset
;
12820 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
12826 /* Find a partial DIE at OFFSET, which may or may not be in CU,
12827 except in the case of .debug_types DIEs which do not reference
12828 outside their CU (they do however referencing other types via
12829 DW_FORM_ref_sig8). */
12831 static struct partial_die_info
*
12832 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
12834 struct objfile
*objfile
= cu
->objfile
;
12835 struct dwarf2_per_cu_data
*per_cu
= NULL
;
12836 struct partial_die_info
*pd
= NULL
;
12838 if (offset_in_dwz
== cu
->per_cu
->is_dwz
12839 && offset_in_cu_p (&cu
->header
, offset
))
12841 pd
= find_partial_die_in_comp_unit (offset
, cu
);
12844 /* We missed recording what we needed.
12845 Load all dies and try again. */
12846 per_cu
= cu
->per_cu
;
12850 /* TUs don't reference other CUs/TUs (except via type signatures). */
12851 if (cu
->per_cu
->is_debug_types
)
12853 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
12854 " external reference to offset 0x%lx [in module %s].\n"),
12855 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
12856 bfd_get_filename (objfile
->obfd
));
12858 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
12861 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
12862 load_partial_comp_unit (per_cu
);
12864 per_cu
->cu
->last_used
= 0;
12865 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
12868 /* If we didn't find it, and not all dies have been loaded,
12869 load them all and try again. */
12871 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
12873 per_cu
->load_all_dies
= 1;
12875 /* This is nasty. When we reread the DIEs, somewhere up the call chain
12876 THIS_CU->cu may already be in use. So we can't just free it and
12877 replace its DIEs with the ones we read in. Instead, we leave those
12878 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
12879 and clobber THIS_CU->cu->partial_dies with the hash table for the new
12881 load_partial_comp_unit (per_cu
);
12883 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
12887 internal_error (__FILE__
, __LINE__
,
12888 _("could not find partial DIE 0x%x "
12889 "in cache [from module %s]\n"),
12890 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
12894 /* See if we can figure out if the class lives in a namespace. We do
12895 this by looking for a member function; its demangled name will
12896 contain namespace info, if there is any. */
12899 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
12900 struct dwarf2_cu
*cu
)
12902 /* NOTE: carlton/2003-10-07: Getting the info this way changes
12903 what template types look like, because the demangler
12904 frequently doesn't give the same name as the debug info. We
12905 could fix this by only using the demangled name to get the
12906 prefix (but see comment in read_structure_type). */
12908 struct partial_die_info
*real_pdi
;
12909 struct partial_die_info
*child_pdi
;
12911 /* If this DIE (this DIE's specification, if any) has a parent, then
12912 we should not do this. We'll prepend the parent's fully qualified
12913 name when we create the partial symbol. */
12915 real_pdi
= struct_pdi
;
12916 while (real_pdi
->has_specification
)
12917 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
12918 real_pdi
->spec_is_dwz
, cu
);
12920 if (real_pdi
->die_parent
!= NULL
)
12923 for (child_pdi
= struct_pdi
->die_child
;
12925 child_pdi
= child_pdi
->die_sibling
)
12927 if (child_pdi
->tag
== DW_TAG_subprogram
12928 && child_pdi
->linkage_name
!= NULL
)
12930 char *actual_class_name
12931 = language_class_name_from_physname (cu
->language_defn
,
12932 child_pdi
->linkage_name
);
12933 if (actual_class_name
!= NULL
)
12936 = obsavestring (actual_class_name
,
12937 strlen (actual_class_name
),
12938 &cu
->objfile
->objfile_obstack
);
12939 xfree (actual_class_name
);
12946 /* Adjust PART_DIE before generating a symbol for it. This function
12947 may set the is_external flag or change the DIE's name. */
12950 fixup_partial_die (struct partial_die_info
*part_die
,
12951 struct dwarf2_cu
*cu
)
12953 /* Once we've fixed up a die, there's no point in doing so again.
12954 This also avoids a memory leak if we were to call
12955 guess_partial_die_structure_name multiple times. */
12956 if (part_die
->fixup_called
)
12959 /* If we found a reference attribute and the DIE has no name, try
12960 to find a name in the referred to DIE. */
12962 if (part_die
->name
== NULL
&& part_die
->has_specification
)
12964 struct partial_die_info
*spec_die
;
12966 spec_die
= find_partial_die (part_die
->spec_offset
,
12967 part_die
->spec_is_dwz
, cu
);
12969 fixup_partial_die (spec_die
, cu
);
12971 if (spec_die
->name
)
12973 part_die
->name
= spec_die
->name
;
12975 /* Copy DW_AT_external attribute if it is set. */
12976 if (spec_die
->is_external
)
12977 part_die
->is_external
= spec_die
->is_external
;
12981 /* Set default names for some unnamed DIEs. */
12983 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
12984 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
12986 /* If there is no parent die to provide a namespace, and there are
12987 children, see if we can determine the namespace from their linkage
12989 if (cu
->language
== language_cplus
12990 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
12991 && part_die
->die_parent
== NULL
12992 && part_die
->has_children
12993 && (part_die
->tag
== DW_TAG_class_type
12994 || part_die
->tag
== DW_TAG_structure_type
12995 || part_die
->tag
== DW_TAG_union_type
))
12996 guess_partial_die_structure_name (part_die
, cu
);
12998 /* GCC might emit a nameless struct or union that has a linkage
12999 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13000 if (part_die
->name
== NULL
13001 && (part_die
->tag
== DW_TAG_class_type
13002 || part_die
->tag
== DW_TAG_interface_type
13003 || part_die
->tag
== DW_TAG_structure_type
13004 || part_die
->tag
== DW_TAG_union_type
)
13005 && part_die
->linkage_name
!= NULL
)
13009 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13014 /* Strip any leading namespaces/classes, keep only the base name.
13015 DW_AT_name for named DIEs does not contain the prefixes. */
13016 base
= strrchr (demangled
, ':');
13017 if (base
&& base
> demangled
&& base
[-1] == ':')
13022 part_die
->name
= obsavestring (base
, strlen (base
),
13023 &cu
->objfile
->objfile_obstack
);
13028 part_die
->fixup_called
= 1;
13031 /* Read an attribute value described by an attribute form. */
13034 read_attribute_value (const struct die_reader_specs
*reader
,
13035 struct attribute
*attr
, unsigned form
,
13036 gdb_byte
*info_ptr
)
13038 struct dwarf2_cu
*cu
= reader
->cu
;
13039 bfd
*abfd
= reader
->abfd
;
13040 struct comp_unit_head
*cu_header
= &cu
->header
;
13041 unsigned int bytes_read
;
13042 struct dwarf_block
*blk
;
13047 case DW_FORM_ref_addr
:
13048 if (cu
->header
.version
== 2)
13049 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13051 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
13052 &cu
->header
, &bytes_read
);
13053 info_ptr
+= bytes_read
;
13055 case DW_FORM_GNU_ref_alt
:
13056 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13057 info_ptr
+= bytes_read
;
13060 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13061 info_ptr
+= bytes_read
;
13063 case DW_FORM_block2
:
13064 blk
= dwarf_alloc_block (cu
);
13065 blk
->size
= read_2_bytes (abfd
, info_ptr
);
13067 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13068 info_ptr
+= blk
->size
;
13069 DW_BLOCK (attr
) = blk
;
13071 case DW_FORM_block4
:
13072 blk
= dwarf_alloc_block (cu
);
13073 blk
->size
= read_4_bytes (abfd
, info_ptr
);
13075 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13076 info_ptr
+= blk
->size
;
13077 DW_BLOCK (attr
) = blk
;
13079 case DW_FORM_data2
:
13080 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
13083 case DW_FORM_data4
:
13084 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
13087 case DW_FORM_data8
:
13088 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
13091 case DW_FORM_sec_offset
:
13092 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13093 info_ptr
+= bytes_read
;
13095 case DW_FORM_string
:
13096 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
13097 DW_STRING_IS_CANONICAL (attr
) = 0;
13098 info_ptr
+= bytes_read
;
13101 if (!cu
->per_cu
->is_dwz
)
13103 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
13105 DW_STRING_IS_CANONICAL (attr
) = 0;
13106 info_ptr
+= bytes_read
;
13110 case DW_FORM_GNU_strp_alt
:
13112 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
13113 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
13116 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
13117 DW_STRING_IS_CANONICAL (attr
) = 0;
13118 info_ptr
+= bytes_read
;
13121 case DW_FORM_exprloc
:
13122 case DW_FORM_block
:
13123 blk
= dwarf_alloc_block (cu
);
13124 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13125 info_ptr
+= bytes_read
;
13126 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13127 info_ptr
+= blk
->size
;
13128 DW_BLOCK (attr
) = blk
;
13130 case DW_FORM_block1
:
13131 blk
= dwarf_alloc_block (cu
);
13132 blk
->size
= read_1_byte (abfd
, info_ptr
);
13134 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13135 info_ptr
+= blk
->size
;
13136 DW_BLOCK (attr
) = blk
;
13138 case DW_FORM_data1
:
13139 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
13143 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
13146 case DW_FORM_flag_present
:
13147 DW_UNSND (attr
) = 1;
13149 case DW_FORM_sdata
:
13150 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
13151 info_ptr
+= bytes_read
;
13153 case DW_FORM_udata
:
13154 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13155 info_ptr
+= bytes_read
;
13158 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13159 + read_1_byte (abfd
, info_ptr
));
13163 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13164 + read_2_bytes (abfd
, info_ptr
));
13168 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13169 + read_4_bytes (abfd
, info_ptr
));
13173 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13174 + read_8_bytes (abfd
, info_ptr
));
13177 case DW_FORM_ref_sig8
:
13178 /* Convert the signature to something we can record in DW_UNSND
13180 NOTE: This is NULL if the type wasn't found. */
13181 DW_SIGNATURED_TYPE (attr
) =
13182 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
13185 case DW_FORM_ref_udata
:
13186 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13187 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
13188 info_ptr
+= bytes_read
;
13190 case DW_FORM_indirect
:
13191 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13192 info_ptr
+= bytes_read
;
13193 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
13195 case DW_FORM_GNU_addr_index
:
13196 if (reader
->dwo_file
== NULL
)
13198 /* For now flag a hard error.
13199 Later we can turn this into a complaint. */
13200 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
13201 dwarf_form_name (form
),
13202 bfd_get_filename (abfd
));
13204 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
13205 info_ptr
+= bytes_read
;
13207 case DW_FORM_GNU_str_index
:
13208 if (reader
->dwo_file
== NULL
)
13210 /* For now flag a hard error.
13211 Later we can turn this into a complaint if warranted. */
13212 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
13213 dwarf_form_name (form
),
13214 bfd_get_filename (abfd
));
13217 ULONGEST str_index
=
13218 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13220 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
13221 DW_STRING_IS_CANONICAL (attr
) = 0;
13222 info_ptr
+= bytes_read
;
13226 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
13227 dwarf_form_name (form
),
13228 bfd_get_filename (abfd
));
13232 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
13233 attr
->form
= DW_FORM_GNU_ref_alt
;
13235 /* We have seen instances where the compiler tried to emit a byte
13236 size attribute of -1 which ended up being encoded as an unsigned
13237 0xffffffff. Although 0xffffffff is technically a valid size value,
13238 an object of this size seems pretty unlikely so we can relatively
13239 safely treat these cases as if the size attribute was invalid and
13240 treat them as zero by default. */
13241 if (attr
->name
== DW_AT_byte_size
13242 && form
== DW_FORM_data4
13243 && DW_UNSND (attr
) >= 0xffffffff)
13246 (&symfile_complaints
,
13247 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
13248 hex_string (DW_UNSND (attr
)));
13249 DW_UNSND (attr
) = 0;
13255 /* Read an attribute described by an abbreviated attribute. */
13258 read_attribute (const struct die_reader_specs
*reader
,
13259 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
13260 gdb_byte
*info_ptr
)
13262 attr
->name
= abbrev
->name
;
13263 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
13266 /* Read dwarf information from a buffer. */
13268 static unsigned int
13269 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
13271 return bfd_get_8 (abfd
, buf
);
13275 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
13277 return bfd_get_signed_8 (abfd
, buf
);
13280 static unsigned int
13281 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
13283 return bfd_get_16 (abfd
, buf
);
13287 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
13289 return bfd_get_signed_16 (abfd
, buf
);
13292 static unsigned int
13293 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
13295 return bfd_get_32 (abfd
, buf
);
13299 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
13301 return bfd_get_signed_32 (abfd
, buf
);
13305 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
13307 return bfd_get_64 (abfd
, buf
);
13311 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
13312 unsigned int *bytes_read
)
13314 struct comp_unit_head
*cu_header
= &cu
->header
;
13315 CORE_ADDR retval
= 0;
13317 if (cu_header
->signed_addr_p
)
13319 switch (cu_header
->addr_size
)
13322 retval
= bfd_get_signed_16 (abfd
, buf
);
13325 retval
= bfd_get_signed_32 (abfd
, buf
);
13328 retval
= bfd_get_signed_64 (abfd
, buf
);
13331 internal_error (__FILE__
, __LINE__
,
13332 _("read_address: bad switch, signed [in module %s]"),
13333 bfd_get_filename (abfd
));
13338 switch (cu_header
->addr_size
)
13341 retval
= bfd_get_16 (abfd
, buf
);
13344 retval
= bfd_get_32 (abfd
, buf
);
13347 retval
= bfd_get_64 (abfd
, buf
);
13350 internal_error (__FILE__
, __LINE__
,
13351 _("read_address: bad switch, "
13352 "unsigned [in module %s]"),
13353 bfd_get_filename (abfd
));
13357 *bytes_read
= cu_header
->addr_size
;
13361 /* Read the initial length from a section. The (draft) DWARF 3
13362 specification allows the initial length to take up either 4 bytes
13363 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
13364 bytes describe the length and all offsets will be 8 bytes in length
13367 An older, non-standard 64-bit format is also handled by this
13368 function. The older format in question stores the initial length
13369 as an 8-byte quantity without an escape value. Lengths greater
13370 than 2^32 aren't very common which means that the initial 4 bytes
13371 is almost always zero. Since a length value of zero doesn't make
13372 sense for the 32-bit format, this initial zero can be considered to
13373 be an escape value which indicates the presence of the older 64-bit
13374 format. As written, the code can't detect (old format) lengths
13375 greater than 4GB. If it becomes necessary to handle lengths
13376 somewhat larger than 4GB, we could allow other small values (such
13377 as the non-sensical values of 1, 2, and 3) to also be used as
13378 escape values indicating the presence of the old format.
13380 The value returned via bytes_read should be used to increment the
13381 relevant pointer after calling read_initial_length().
13383 [ Note: read_initial_length() and read_offset() are based on the
13384 document entitled "DWARF Debugging Information Format", revision
13385 3, draft 8, dated November 19, 2001. This document was obtained
13388 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
13390 This document is only a draft and is subject to change. (So beware.)
13392 Details regarding the older, non-standard 64-bit format were
13393 determined empirically by examining 64-bit ELF files produced by
13394 the SGI toolchain on an IRIX 6.5 machine.
13396 - Kevin, July 16, 2002
13400 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
13402 LONGEST length
= bfd_get_32 (abfd
, buf
);
13404 if (length
== 0xffffffff)
13406 length
= bfd_get_64 (abfd
, buf
+ 4);
13409 else if (length
== 0)
13411 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
13412 length
= bfd_get_64 (abfd
, buf
);
13423 /* Cover function for read_initial_length.
13424 Returns the length of the object at BUF, and stores the size of the
13425 initial length in *BYTES_READ and stores the size that offsets will be in
13427 If the initial length size is not equivalent to that specified in
13428 CU_HEADER then issue a complaint.
13429 This is useful when reading non-comp-unit headers. */
13432 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
13433 const struct comp_unit_head
*cu_header
,
13434 unsigned int *bytes_read
,
13435 unsigned int *offset_size
)
13437 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
13439 gdb_assert (cu_header
->initial_length_size
== 4
13440 || cu_header
->initial_length_size
== 8
13441 || cu_header
->initial_length_size
== 12);
13443 if (cu_header
->initial_length_size
!= *bytes_read
)
13444 complaint (&symfile_complaints
,
13445 _("intermixed 32-bit and 64-bit DWARF sections"));
13447 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
13451 /* Read an offset from the data stream. The size of the offset is
13452 given by cu_header->offset_size. */
13455 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
13456 unsigned int *bytes_read
)
13458 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
13460 *bytes_read
= cu_header
->offset_size
;
13464 /* Read an offset from the data stream. */
13467 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
13469 LONGEST retval
= 0;
13471 switch (offset_size
)
13474 retval
= bfd_get_32 (abfd
, buf
);
13477 retval
= bfd_get_64 (abfd
, buf
);
13480 internal_error (__FILE__
, __LINE__
,
13481 _("read_offset_1: bad switch [in module %s]"),
13482 bfd_get_filename (abfd
));
13489 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
13491 /* If the size of a host char is 8 bits, we can return a pointer
13492 to the buffer, otherwise we have to copy the data to a buffer
13493 allocated on the temporary obstack. */
13494 gdb_assert (HOST_CHAR_BIT
== 8);
13499 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13501 /* If the size of a host char is 8 bits, we can return a pointer
13502 to the string, otherwise we have to copy the string to a buffer
13503 allocated on the temporary obstack. */
13504 gdb_assert (HOST_CHAR_BIT
== 8);
13507 *bytes_read_ptr
= 1;
13510 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
13511 return (char *) buf
;
13515 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
13517 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
13518 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
13519 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
13520 bfd_get_filename (abfd
));
13521 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
13522 error (_("DW_FORM_strp pointing outside of "
13523 ".debug_str section [in module %s]"),
13524 bfd_get_filename (abfd
));
13525 gdb_assert (HOST_CHAR_BIT
== 8);
13526 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
13528 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
13531 /* Read a string at offset STR_OFFSET in the .debug_str section from
13532 the .dwz file DWZ. Throw an error if the offset is too large. If
13533 the string consists of a single NUL byte, return NULL; otherwise
13534 return a pointer to the string. */
13537 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
13539 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
13541 if (dwz
->str
.buffer
== NULL
)
13542 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
13543 "section [in module %s]"),
13544 bfd_get_filename (dwz
->dwz_bfd
));
13545 if (str_offset
>= dwz
->str
.size
)
13546 error (_("DW_FORM_GNU_strp_alt pointing outside of "
13547 ".debug_str section [in module %s]"),
13548 bfd_get_filename (dwz
->dwz_bfd
));
13549 gdb_assert (HOST_CHAR_BIT
== 8);
13550 if (dwz
->str
.buffer
[str_offset
] == '\0')
13552 return (char *) (dwz
->str
.buffer
+ str_offset
);
13556 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
13557 const struct comp_unit_head
*cu_header
,
13558 unsigned int *bytes_read_ptr
)
13560 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
13562 return read_indirect_string_at_offset (abfd
, str_offset
);
13566 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13569 unsigned int num_read
;
13571 unsigned char byte
;
13579 byte
= bfd_get_8 (abfd
, buf
);
13582 result
|= ((ULONGEST
) (byte
& 127) << shift
);
13583 if ((byte
& 128) == 0)
13589 *bytes_read_ptr
= num_read
;
13594 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13597 int i
, shift
, num_read
;
13598 unsigned char byte
;
13606 byte
= bfd_get_8 (abfd
, buf
);
13609 result
|= ((LONGEST
) (byte
& 127) << shift
);
13611 if ((byte
& 128) == 0)
13616 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
13617 result
|= -(((LONGEST
) 1) << shift
);
13618 *bytes_read_ptr
= num_read
;
13622 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
13623 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
13624 ADDR_SIZE is the size of addresses from the CU header. */
13627 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
13629 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13630 bfd
*abfd
= objfile
->obfd
;
13631 const gdb_byte
*info_ptr
;
13633 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
13634 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
13635 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
13637 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
13638 error (_("DW_FORM_addr_index pointing outside of "
13639 ".debug_addr section [in module %s]"),
13641 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
13642 + addr_base
+ addr_index
* addr_size
);
13643 if (addr_size
== 4)
13644 return bfd_get_32 (abfd
, info_ptr
);
13646 return bfd_get_64 (abfd
, info_ptr
);
13649 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
13652 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
13654 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
13657 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
13660 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
13661 unsigned int *bytes_read
)
13663 bfd
*abfd
= cu
->objfile
->obfd
;
13664 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
13666 return read_addr_index (cu
, addr_index
);
13669 /* Data structure to pass results from dwarf2_read_addr_index_reader
13670 back to dwarf2_read_addr_index. */
13672 struct dwarf2_read_addr_index_data
13674 ULONGEST addr_base
;
13678 /* die_reader_func for dwarf2_read_addr_index. */
13681 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
13682 gdb_byte
*info_ptr
,
13683 struct die_info
*comp_unit_die
,
13687 struct dwarf2_cu
*cu
= reader
->cu
;
13688 struct dwarf2_read_addr_index_data
*aidata
=
13689 (struct dwarf2_read_addr_index_data
*) data
;
13691 aidata
->addr_base
= cu
->addr_base
;
13692 aidata
->addr_size
= cu
->header
.addr_size
;
13695 /* Given an index in .debug_addr, fetch the value.
13696 NOTE: This can be called during dwarf expression evaluation,
13697 long after the debug information has been read, and thus per_cu->cu
13698 may no longer exist. */
13701 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
13702 unsigned int addr_index
)
13704 struct objfile
*objfile
= per_cu
->objfile
;
13705 struct dwarf2_cu
*cu
= per_cu
->cu
;
13706 ULONGEST addr_base
;
13709 /* This is intended to be called from outside this file. */
13710 dw2_setup (objfile
);
13712 /* We need addr_base and addr_size.
13713 If we don't have PER_CU->cu, we have to get it.
13714 Nasty, but the alternative is storing the needed info in PER_CU,
13715 which at this point doesn't seem justified: it's not clear how frequently
13716 it would get used and it would increase the size of every PER_CU.
13717 Entry points like dwarf2_per_cu_addr_size do a similar thing
13718 so we're not in uncharted territory here.
13719 Alas we need to be a bit more complicated as addr_base is contained
13722 We don't need to read the entire CU(/TU).
13723 We just need the header and top level die.
13724 IWBN to use the aging mechanism to let us lazily later discard the CU.
13725 See however init_cutu_and_read_dies_simple. */
13729 addr_base
= cu
->addr_base
;
13730 addr_size
= cu
->header
.addr_size
;
13734 struct dwarf2_read_addr_index_data aidata
;
13736 init_cutu_and_read_dies_simple (per_cu
, dwarf2_read_addr_index_reader
,
13738 addr_base
= aidata
.addr_base
;
13739 addr_size
= aidata
.addr_size
;
13742 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
13745 /* Given a DW_AT_str_index, fetch the string. */
13748 read_str_index (const struct die_reader_specs
*reader
,
13749 struct dwarf2_cu
*cu
, ULONGEST str_index
)
13751 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13752 const char *dwo_name
= objfile
->name
;
13753 bfd
*abfd
= objfile
->obfd
;
13754 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
13755 gdb_byte
*info_ptr
;
13756 ULONGEST str_offset
;
13758 dwarf2_read_section (objfile
, §ions
->str
);
13759 dwarf2_read_section (objfile
, §ions
->str_offsets
);
13760 if (sections
->str
.buffer
== NULL
)
13761 error (_("DW_FORM_str_index used without .debug_str.dwo section"
13762 " in CU at offset 0x%lx [in module %s]"),
13763 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13764 if (sections
->str_offsets
.buffer
== NULL
)
13765 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
13766 " in CU at offset 0x%lx [in module %s]"),
13767 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13768 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
13769 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
13770 " section in CU at offset 0x%lx [in module %s]"),
13771 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13772 info_ptr
= (sections
->str_offsets
.buffer
13773 + str_index
* cu
->header
.offset_size
);
13774 if (cu
->header
.offset_size
== 4)
13775 str_offset
= bfd_get_32 (abfd
, info_ptr
);
13777 str_offset
= bfd_get_64 (abfd
, info_ptr
);
13778 if (str_offset
>= sections
->str
.size
)
13779 error (_("Offset from DW_FORM_str_index pointing outside of"
13780 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
13781 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13782 return (char *) (sections
->str
.buffer
+ str_offset
);
13785 /* Return the length of an LEB128 number in BUF. */
13788 leb128_size (const gdb_byte
*buf
)
13790 const gdb_byte
*begin
= buf
;
13796 if ((byte
& 128) == 0)
13797 return buf
- begin
;
13802 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
13809 cu
->language
= language_c
;
13811 case DW_LANG_C_plus_plus
:
13812 cu
->language
= language_cplus
;
13815 cu
->language
= language_d
;
13817 case DW_LANG_Fortran77
:
13818 case DW_LANG_Fortran90
:
13819 case DW_LANG_Fortran95
:
13820 cu
->language
= language_fortran
;
13823 cu
->language
= language_go
;
13825 case DW_LANG_Mips_Assembler
:
13826 cu
->language
= language_asm
;
13829 cu
->language
= language_java
;
13831 case DW_LANG_Ada83
:
13832 case DW_LANG_Ada95
:
13833 cu
->language
= language_ada
;
13835 case DW_LANG_Modula2
:
13836 cu
->language
= language_m2
;
13838 case DW_LANG_Pascal83
:
13839 cu
->language
= language_pascal
;
13842 cu
->language
= language_objc
;
13844 case DW_LANG_Cobol74
:
13845 case DW_LANG_Cobol85
:
13847 cu
->language
= language_minimal
;
13850 cu
->language_defn
= language_def (cu
->language
);
13853 /* Return the named attribute or NULL if not there. */
13855 static struct attribute
*
13856 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
13861 struct attribute
*spec
= NULL
;
13863 for (i
= 0; i
< die
->num_attrs
; ++i
)
13865 if (die
->attrs
[i
].name
== name
)
13866 return &die
->attrs
[i
];
13867 if (die
->attrs
[i
].name
== DW_AT_specification
13868 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
13869 spec
= &die
->attrs
[i
];
13875 die
= follow_die_ref (die
, spec
, &cu
);
13881 /* Return the named attribute or NULL if not there,
13882 but do not follow DW_AT_specification, etc.
13883 This is for use in contexts where we're reading .debug_types dies.
13884 Following DW_AT_specification, DW_AT_abstract_origin will take us
13885 back up the chain, and we want to go down. */
13887 static struct attribute
*
13888 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
13892 for (i
= 0; i
< die
->num_attrs
; ++i
)
13893 if (die
->attrs
[i
].name
== name
)
13894 return &die
->attrs
[i
];
13899 /* Return non-zero iff the attribute NAME is defined for the given DIE,
13900 and holds a non-zero value. This function should only be used for
13901 DW_FORM_flag or DW_FORM_flag_present attributes. */
13904 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
13906 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
13908 return (attr
&& DW_UNSND (attr
));
13912 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
13914 /* A DIE is a declaration if it has a DW_AT_declaration attribute
13915 which value is non-zero. However, we have to be careful with
13916 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
13917 (via dwarf2_flag_true_p) follows this attribute. So we may
13918 end up accidently finding a declaration attribute that belongs
13919 to a different DIE referenced by the specification attribute,
13920 even though the given DIE does not have a declaration attribute. */
13921 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
13922 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
13925 /* Return the die giving the specification for DIE, if there is
13926 one. *SPEC_CU is the CU containing DIE on input, and the CU
13927 containing the return value on output. If there is no
13928 specification, but there is an abstract origin, that is
13931 static struct die_info
*
13932 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
13934 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
13937 if (spec_attr
== NULL
)
13938 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
13940 if (spec_attr
== NULL
)
13943 return follow_die_ref (die
, spec_attr
, spec_cu
);
13946 /* Free the line_header structure *LH, and any arrays and strings it
13948 NOTE: This is also used as a "cleanup" function. */
13951 free_line_header (struct line_header
*lh
)
13953 if (lh
->standard_opcode_lengths
)
13954 xfree (lh
->standard_opcode_lengths
);
13956 /* Remember that all the lh->file_names[i].name pointers are
13957 pointers into debug_line_buffer, and don't need to be freed. */
13958 if (lh
->file_names
)
13959 xfree (lh
->file_names
);
13961 /* Similarly for the include directory names. */
13962 if (lh
->include_dirs
)
13963 xfree (lh
->include_dirs
);
13968 /* Add an entry to LH's include directory table. */
13971 add_include_dir (struct line_header
*lh
, char *include_dir
)
13973 /* Grow the array if necessary. */
13974 if (lh
->include_dirs_size
== 0)
13976 lh
->include_dirs_size
= 1; /* for testing */
13977 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
13978 * sizeof (*lh
->include_dirs
));
13980 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
13982 lh
->include_dirs_size
*= 2;
13983 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
13984 (lh
->include_dirs_size
13985 * sizeof (*lh
->include_dirs
)));
13988 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
13991 /* Add an entry to LH's file name table. */
13994 add_file_name (struct line_header
*lh
,
13996 unsigned int dir_index
,
13997 unsigned int mod_time
,
13998 unsigned int length
)
14000 struct file_entry
*fe
;
14002 /* Grow the array if necessary. */
14003 if (lh
->file_names_size
== 0)
14005 lh
->file_names_size
= 1; /* for testing */
14006 lh
->file_names
= xmalloc (lh
->file_names_size
14007 * sizeof (*lh
->file_names
));
14009 else if (lh
->num_file_names
>= lh
->file_names_size
)
14011 lh
->file_names_size
*= 2;
14012 lh
->file_names
= xrealloc (lh
->file_names
,
14013 (lh
->file_names_size
14014 * sizeof (*lh
->file_names
)));
14017 fe
= &lh
->file_names
[lh
->num_file_names
++];
14019 fe
->dir_index
= dir_index
;
14020 fe
->mod_time
= mod_time
;
14021 fe
->length
= length
;
14022 fe
->included_p
= 0;
14026 /* A convenience function to find the proper .debug_line section for a
14029 static struct dwarf2_section_info
*
14030 get_debug_line_section (struct dwarf2_cu
*cu
)
14032 struct dwarf2_section_info
*section
;
14034 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14036 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14037 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14038 else if (cu
->per_cu
->is_dwz
)
14040 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14042 section
= &dwz
->line
;
14045 section
= &dwarf2_per_objfile
->line
;
14050 /* Read the statement program header starting at OFFSET in
14051 .debug_line, or .debug_line.dwo. Return a pointer
14052 to a struct line_header, allocated using xmalloc.
14054 NOTE: the strings in the include directory and file name tables of
14055 the returned object point into the dwarf line section buffer,
14056 and must not be freed. */
14058 static struct line_header
*
14059 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
14061 struct cleanup
*back_to
;
14062 struct line_header
*lh
;
14063 gdb_byte
*line_ptr
;
14064 unsigned int bytes_read
, offset_size
;
14066 char *cur_dir
, *cur_file
;
14067 struct dwarf2_section_info
*section
;
14070 section
= get_debug_line_section (cu
);
14071 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
14072 if (section
->buffer
== NULL
)
14074 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14075 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
14077 complaint (&symfile_complaints
, _("missing .debug_line section"));
14081 /* We can't do this until we know the section is non-empty.
14082 Only then do we know we have such a section. */
14083 abfd
= section
->asection
->owner
;
14085 /* Make sure that at least there's room for the total_length field.
14086 That could be 12 bytes long, but we're just going to fudge that. */
14087 if (offset
+ 4 >= section
->size
)
14089 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14093 lh
= xmalloc (sizeof (*lh
));
14094 memset (lh
, 0, sizeof (*lh
));
14095 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
14098 line_ptr
= section
->buffer
+ offset
;
14100 /* Read in the header. */
14102 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
14103 &bytes_read
, &offset_size
);
14104 line_ptr
+= bytes_read
;
14105 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
14107 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14110 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
14111 lh
->version
= read_2_bytes (abfd
, line_ptr
);
14113 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
14114 line_ptr
+= offset_size
;
14115 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
14117 if (lh
->version
>= 4)
14119 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
14123 lh
->maximum_ops_per_instruction
= 1;
14125 if (lh
->maximum_ops_per_instruction
== 0)
14127 lh
->maximum_ops_per_instruction
= 1;
14128 complaint (&symfile_complaints
,
14129 _("invalid maximum_ops_per_instruction "
14130 "in `.debug_line' section"));
14133 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
14135 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
14137 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
14139 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
14141 lh
->standard_opcode_lengths
14142 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
14144 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
14145 for (i
= 1; i
< lh
->opcode_base
; ++i
)
14147 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
14151 /* Read directory table. */
14152 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
14154 line_ptr
+= bytes_read
;
14155 add_include_dir (lh
, cur_dir
);
14157 line_ptr
+= bytes_read
;
14159 /* Read file name table. */
14160 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
14162 unsigned int dir_index
, mod_time
, length
;
14164 line_ptr
+= bytes_read
;
14165 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14166 line_ptr
+= bytes_read
;
14167 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14168 line_ptr
+= bytes_read
;
14169 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14170 line_ptr
+= bytes_read
;
14172 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
14174 line_ptr
+= bytes_read
;
14175 lh
->statement_program_start
= line_ptr
;
14177 if (line_ptr
> (section
->buffer
+ section
->size
))
14178 complaint (&symfile_complaints
,
14179 _("line number info header doesn't "
14180 "fit in `.debug_line' section"));
14182 discard_cleanups (back_to
);
14186 /* Subroutine of dwarf_decode_lines to simplify it.
14187 Return the file name of the psymtab for included file FILE_INDEX
14188 in line header LH of PST.
14189 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
14190 If space for the result is malloc'd, it will be freed by a cleanup.
14191 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
14194 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
14195 const struct partial_symtab
*pst
,
14196 const char *comp_dir
)
14198 const struct file_entry fe
= lh
->file_names
[file_index
];
14199 char *include_name
= fe
.name
;
14200 char *include_name_to_compare
= include_name
;
14201 char *dir_name
= NULL
;
14202 const char *pst_filename
;
14203 char *copied_name
= NULL
;
14207 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
14209 if (!IS_ABSOLUTE_PATH (include_name
)
14210 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
14212 /* Avoid creating a duplicate psymtab for PST.
14213 We do this by comparing INCLUDE_NAME and PST_FILENAME.
14214 Before we do the comparison, however, we need to account
14215 for DIR_NAME and COMP_DIR.
14216 First prepend dir_name (if non-NULL). If we still don't
14217 have an absolute path prepend comp_dir (if non-NULL).
14218 However, the directory we record in the include-file's
14219 psymtab does not contain COMP_DIR (to match the
14220 corresponding symtab(s)).
14225 bash$ gcc -g ./hello.c
14226 include_name = "hello.c"
14228 DW_AT_comp_dir = comp_dir = "/tmp"
14229 DW_AT_name = "./hello.c" */
14231 if (dir_name
!= NULL
)
14233 include_name
= concat (dir_name
, SLASH_STRING
,
14234 include_name
, (char *)NULL
);
14235 include_name_to_compare
= include_name
;
14236 make_cleanup (xfree
, include_name
);
14238 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
14240 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
14241 include_name
, (char *)NULL
);
14245 pst_filename
= pst
->filename
;
14246 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
14248 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
14249 pst_filename
, (char *)NULL
);
14250 pst_filename
= copied_name
;
14253 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
14255 if (include_name_to_compare
!= include_name
)
14256 xfree (include_name_to_compare
);
14257 if (copied_name
!= NULL
)
14258 xfree (copied_name
);
14262 return include_name
;
14265 /* Ignore this record_line request. */
14268 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
14273 /* Subroutine of dwarf_decode_lines to simplify it.
14274 Process the line number information in LH. */
14277 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
14278 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
14280 gdb_byte
*line_ptr
, *extended_end
;
14281 gdb_byte
*line_end
;
14282 unsigned int bytes_read
, extended_len
;
14283 unsigned char op_code
, extended_op
, adj_opcode
;
14284 CORE_ADDR baseaddr
;
14285 struct objfile
*objfile
= cu
->objfile
;
14286 bfd
*abfd
= objfile
->obfd
;
14287 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14288 const int decode_for_pst_p
= (pst
!= NULL
);
14289 struct subfile
*last_subfile
= NULL
;
14290 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
14293 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14295 line_ptr
= lh
->statement_program_start
;
14296 line_end
= lh
->statement_program_end
;
14298 /* Read the statement sequences until there's nothing left. */
14299 while (line_ptr
< line_end
)
14301 /* state machine registers */
14302 CORE_ADDR address
= 0;
14303 unsigned int file
= 1;
14304 unsigned int line
= 1;
14305 unsigned int column
= 0;
14306 int is_stmt
= lh
->default_is_stmt
;
14307 int basic_block
= 0;
14308 int end_sequence
= 0;
14310 unsigned char op_index
= 0;
14312 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
14314 /* Start a subfile for the current file of the state machine. */
14315 /* lh->include_dirs and lh->file_names are 0-based, but the
14316 directory and file name numbers in the statement program
14318 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
14322 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14324 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14327 /* Decode the table. */
14328 while (!end_sequence
)
14330 op_code
= read_1_byte (abfd
, line_ptr
);
14332 if (line_ptr
> line_end
)
14334 dwarf2_debug_line_missing_end_sequence_complaint ();
14338 if (op_code
>= lh
->opcode_base
)
14340 /* Special operand. */
14341 adj_opcode
= op_code
- lh
->opcode_base
;
14342 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
14343 / lh
->maximum_ops_per_instruction
)
14344 * lh
->minimum_instruction_length
);
14345 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
14346 % lh
->maximum_ops_per_instruction
);
14347 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
14348 if (lh
->num_file_names
< file
|| file
== 0)
14349 dwarf2_debug_line_missing_file_complaint ();
14350 /* For now we ignore lines not starting on an
14351 instruction boundary. */
14352 else if (op_index
== 0)
14354 lh
->file_names
[file
- 1].included_p
= 1;
14355 if (!decode_for_pst_p
&& is_stmt
)
14357 if (last_subfile
!= current_subfile
)
14359 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14361 (*p_record_line
) (last_subfile
, 0, addr
);
14362 last_subfile
= current_subfile
;
14364 /* Append row to matrix using current values. */
14365 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14366 (*p_record_line
) (current_subfile
, line
, addr
);
14371 else switch (op_code
)
14373 case DW_LNS_extended_op
:
14374 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
14376 line_ptr
+= bytes_read
;
14377 extended_end
= line_ptr
+ extended_len
;
14378 extended_op
= read_1_byte (abfd
, line_ptr
);
14380 switch (extended_op
)
14382 case DW_LNE_end_sequence
:
14383 p_record_line
= record_line
;
14386 case DW_LNE_set_address
:
14387 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
14389 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14391 /* This line table is for a function which has been
14392 GCd by the linker. Ignore it. PR gdb/12528 */
14395 = line_ptr
- get_debug_line_section (cu
)->buffer
;
14397 complaint (&symfile_complaints
,
14398 _(".debug_line address at offset 0x%lx is 0 "
14400 line_offset
, objfile
->name
);
14401 p_record_line
= noop_record_line
;
14405 line_ptr
+= bytes_read
;
14406 address
+= baseaddr
;
14408 case DW_LNE_define_file
:
14411 unsigned int dir_index
, mod_time
, length
;
14413 cur_file
= read_direct_string (abfd
, line_ptr
,
14415 line_ptr
+= bytes_read
;
14417 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14418 line_ptr
+= bytes_read
;
14420 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14421 line_ptr
+= bytes_read
;
14423 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14424 line_ptr
+= bytes_read
;
14425 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
14428 case DW_LNE_set_discriminator
:
14429 /* The discriminator is not interesting to the debugger;
14431 line_ptr
= extended_end
;
14434 complaint (&symfile_complaints
,
14435 _("mangled .debug_line section"));
14438 /* Make sure that we parsed the extended op correctly. If e.g.
14439 we expected a different address size than the producer used,
14440 we may have read the wrong number of bytes. */
14441 if (line_ptr
!= extended_end
)
14443 complaint (&symfile_complaints
,
14444 _("mangled .debug_line section"));
14449 if (lh
->num_file_names
< file
|| file
== 0)
14450 dwarf2_debug_line_missing_file_complaint ();
14453 lh
->file_names
[file
- 1].included_p
= 1;
14454 if (!decode_for_pst_p
&& is_stmt
)
14456 if (last_subfile
!= current_subfile
)
14458 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14460 (*p_record_line
) (last_subfile
, 0, addr
);
14461 last_subfile
= current_subfile
;
14463 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14464 (*p_record_line
) (current_subfile
, line
, addr
);
14469 case DW_LNS_advance_pc
:
14472 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14474 address
+= (((op_index
+ adjust
)
14475 / lh
->maximum_ops_per_instruction
)
14476 * lh
->minimum_instruction_length
);
14477 op_index
= ((op_index
+ adjust
)
14478 % lh
->maximum_ops_per_instruction
);
14479 line_ptr
+= bytes_read
;
14482 case DW_LNS_advance_line
:
14483 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
14484 line_ptr
+= bytes_read
;
14486 case DW_LNS_set_file
:
14488 /* The arrays lh->include_dirs and lh->file_names are
14489 0-based, but the directory and file name numbers in
14490 the statement program are 1-based. */
14491 struct file_entry
*fe
;
14494 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14495 line_ptr
+= bytes_read
;
14496 if (lh
->num_file_names
< file
|| file
== 0)
14497 dwarf2_debug_line_missing_file_complaint ();
14500 fe
= &lh
->file_names
[file
- 1];
14502 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14503 if (!decode_for_pst_p
)
14505 last_subfile
= current_subfile
;
14506 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14511 case DW_LNS_set_column
:
14512 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14513 line_ptr
+= bytes_read
;
14515 case DW_LNS_negate_stmt
:
14516 is_stmt
= (!is_stmt
);
14518 case DW_LNS_set_basic_block
:
14521 /* Add to the address register of the state machine the
14522 address increment value corresponding to special opcode
14523 255. I.e., this value is scaled by the minimum
14524 instruction length since special opcode 255 would have
14525 scaled the increment. */
14526 case DW_LNS_const_add_pc
:
14528 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
14530 address
+= (((op_index
+ adjust
)
14531 / lh
->maximum_ops_per_instruction
)
14532 * lh
->minimum_instruction_length
);
14533 op_index
= ((op_index
+ adjust
)
14534 % lh
->maximum_ops_per_instruction
);
14537 case DW_LNS_fixed_advance_pc
:
14538 address
+= read_2_bytes (abfd
, line_ptr
);
14544 /* Unknown standard opcode, ignore it. */
14547 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
14549 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14550 line_ptr
+= bytes_read
;
14555 if (lh
->num_file_names
< file
|| file
== 0)
14556 dwarf2_debug_line_missing_file_complaint ();
14559 lh
->file_names
[file
- 1].included_p
= 1;
14560 if (!decode_for_pst_p
)
14562 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14563 (*p_record_line
) (current_subfile
, 0, addr
);
14569 /* Decode the Line Number Program (LNP) for the given line_header
14570 structure and CU. The actual information extracted and the type
14571 of structures created from the LNP depends on the value of PST.
14573 1. If PST is NULL, then this procedure uses the data from the program
14574 to create all necessary symbol tables, and their linetables.
14576 2. If PST is not NULL, this procedure reads the program to determine
14577 the list of files included by the unit represented by PST, and
14578 builds all the associated partial symbol tables.
14580 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
14581 It is used for relative paths in the line table.
14582 NOTE: When processing partial symtabs (pst != NULL),
14583 comp_dir == pst->dirname.
14585 NOTE: It is important that psymtabs have the same file name (via strcmp)
14586 as the corresponding symtab. Since COMP_DIR is not used in the name of the
14587 symtab we don't use it in the name of the psymtabs we create.
14588 E.g. expand_line_sal requires this when finding psymtabs to expand.
14589 A good testcase for this is mb-inline.exp. */
14592 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
14593 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
14594 int want_line_info
)
14596 struct objfile
*objfile
= cu
->objfile
;
14597 const int decode_for_pst_p
= (pst
!= NULL
);
14598 struct subfile
*first_subfile
= current_subfile
;
14600 if (want_line_info
)
14601 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
14603 if (decode_for_pst_p
)
14607 /* Now that we're done scanning the Line Header Program, we can
14608 create the psymtab of each included file. */
14609 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
14610 if (lh
->file_names
[file_index
].included_p
== 1)
14612 char *include_name
=
14613 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
14614 if (include_name
!= NULL
)
14615 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
14620 /* Make sure a symtab is created for every file, even files
14621 which contain only variables (i.e. no code with associated
14625 for (i
= 0; i
< lh
->num_file_names
; i
++)
14628 struct file_entry
*fe
;
14630 fe
= &lh
->file_names
[i
];
14632 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14633 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14635 /* Skip the main file; we don't need it, and it must be
14636 allocated last, so that it will show up before the
14637 non-primary symtabs in the objfile's symtab list. */
14638 if (current_subfile
== first_subfile
)
14641 if (current_subfile
->symtab
== NULL
)
14642 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
14644 fe
->symtab
= current_subfile
->symtab
;
14649 /* Start a subfile for DWARF. FILENAME is the name of the file and
14650 DIRNAME the name of the source directory which contains FILENAME
14651 or NULL if not known. COMP_DIR is the compilation directory for the
14652 linetable's compilation unit or NULL if not known.
14653 This routine tries to keep line numbers from identical absolute and
14654 relative file names in a common subfile.
14656 Using the `list' example from the GDB testsuite, which resides in
14657 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
14658 of /srcdir/list0.c yields the following debugging information for list0.c:
14660 DW_AT_name: /srcdir/list0.c
14661 DW_AT_comp_dir: /compdir
14662 files.files[0].name: list0.h
14663 files.files[0].dir: /srcdir
14664 files.files[1].name: list0.c
14665 files.files[1].dir: /srcdir
14667 The line number information for list0.c has to end up in a single
14668 subfile, so that `break /srcdir/list0.c:1' works as expected.
14669 start_subfile will ensure that this happens provided that we pass the
14670 concatenation of files.files[1].dir and files.files[1].name as the
14674 dwarf2_start_subfile (char *filename
, const char *dirname
,
14675 const char *comp_dir
)
14679 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
14680 `start_symtab' will always pass the contents of DW_AT_comp_dir as
14681 second argument to start_subfile. To be consistent, we do the
14682 same here. In order not to lose the line information directory,
14683 we concatenate it to the filename when it makes sense.
14684 Note that the Dwarf3 standard says (speaking of filenames in line
14685 information): ``The directory index is ignored for file names
14686 that represent full path names''. Thus ignoring dirname in the
14687 `else' branch below isn't an issue. */
14689 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
14690 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
14692 fullname
= filename
;
14694 start_subfile (fullname
, comp_dir
);
14696 if (fullname
!= filename
)
14700 /* Start a symtab for DWARF.
14701 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
14704 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
14705 char *name
, char *comp_dir
, CORE_ADDR low_pc
)
14707 start_symtab (name
, comp_dir
, low_pc
);
14708 record_debugformat ("DWARF 2");
14709 record_producer (cu
->producer
);
14711 /* We assume that we're processing GCC output. */
14712 processing_gcc_compilation
= 2;
14714 processing_has_namespace_info
= 0;
14718 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
14719 struct dwarf2_cu
*cu
)
14721 struct objfile
*objfile
= cu
->objfile
;
14722 struct comp_unit_head
*cu_header
= &cu
->header
;
14724 /* NOTE drow/2003-01-30: There used to be a comment and some special
14725 code here to turn a symbol with DW_AT_external and a
14726 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
14727 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
14728 with some versions of binutils) where shared libraries could have
14729 relocations against symbols in their debug information - the
14730 minimal symbol would have the right address, but the debug info
14731 would not. It's no longer necessary, because we will explicitly
14732 apply relocations when we read in the debug information now. */
14734 /* A DW_AT_location attribute with no contents indicates that a
14735 variable has been optimized away. */
14736 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
14738 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
14742 /* Handle one degenerate form of location expression specially, to
14743 preserve GDB's previous behavior when section offsets are
14744 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
14745 then mark this symbol as LOC_STATIC. */
14747 if (attr_form_is_block (attr
)
14748 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
14749 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
14750 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
14751 && (DW_BLOCK (attr
)->size
14752 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
14754 unsigned int dummy
;
14756 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
14757 SYMBOL_VALUE_ADDRESS (sym
) =
14758 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
14760 SYMBOL_VALUE_ADDRESS (sym
) =
14761 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
14762 SYMBOL_CLASS (sym
) = LOC_STATIC
;
14763 fixup_symbol_section (sym
, objfile
);
14764 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
14765 SYMBOL_SECTION (sym
));
14769 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
14770 expression evaluator, and use LOC_COMPUTED only when necessary
14771 (i.e. when the value of a register or memory location is
14772 referenced, or a thread-local block, etc.). Then again, it might
14773 not be worthwhile. I'm assuming that it isn't unless performance
14774 or memory numbers show me otherwise. */
14776 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
14777 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
14779 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
14780 cu
->has_loclist
= 1;
14783 /* Given a pointer to a DWARF information entry, figure out if we need
14784 to make a symbol table entry for it, and if so, create a new entry
14785 and return a pointer to it.
14786 If TYPE is NULL, determine symbol type from the die, otherwise
14787 used the passed type.
14788 If SPACE is not NULL, use it to hold the new symbol. If it is
14789 NULL, allocate a new symbol on the objfile's obstack. */
14791 static struct symbol
*
14792 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
14793 struct symbol
*space
)
14795 struct objfile
*objfile
= cu
->objfile
;
14796 struct symbol
*sym
= NULL
;
14798 struct attribute
*attr
= NULL
;
14799 struct attribute
*attr2
= NULL
;
14800 CORE_ADDR baseaddr
;
14801 struct pending
**list_to_add
= NULL
;
14803 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
14805 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14807 name
= dwarf2_name (die
, cu
);
14810 const char *linkagename
;
14811 int suppress_add
= 0;
14816 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
14817 OBJSTAT (objfile
, n_syms
++);
14819 /* Cache this symbol's name and the name's demangled form (if any). */
14820 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
14821 linkagename
= dwarf2_physname (name
, die
, cu
);
14822 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
14824 /* Fortran does not have mangling standard and the mangling does differ
14825 between gfortran, iFort etc. */
14826 if (cu
->language
== language_fortran
14827 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
14828 symbol_set_demangled_name (&(sym
->ginfo
),
14829 (char *) dwarf2_full_name (name
, die
, cu
),
14832 /* Default assumptions.
14833 Use the passed type or decode it from the die. */
14834 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
14835 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
14837 SYMBOL_TYPE (sym
) = type
;
14839 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
14840 attr
= dwarf2_attr (die
,
14841 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
14845 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
14848 attr
= dwarf2_attr (die
,
14849 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
14853 int file_index
= DW_UNSND (attr
);
14855 if (cu
->line_header
== NULL
14856 || file_index
> cu
->line_header
->num_file_names
)
14857 complaint (&symfile_complaints
,
14858 _("file index out of range"));
14859 else if (file_index
> 0)
14861 struct file_entry
*fe
;
14863 fe
= &cu
->line_header
->file_names
[file_index
- 1];
14864 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
14871 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14874 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
14876 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
14877 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
14878 SYMBOL_CLASS (sym
) = LOC_LABEL
;
14879 add_symbol_to_list (sym
, cu
->list_in_scope
);
14881 case DW_TAG_subprogram
:
14882 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14884 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
14885 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14886 if ((attr2
&& (DW_UNSND (attr2
) != 0))
14887 || cu
->language
== language_ada
)
14889 /* Subprograms marked external are stored as a global symbol.
14890 Ada subprograms, whether marked external or not, are always
14891 stored as a global symbol, because we want to be able to
14892 access them globally. For instance, we want to be able
14893 to break on a nested subprogram without having to
14894 specify the context. */
14895 list_to_add
= &global_symbols
;
14899 list_to_add
= cu
->list_in_scope
;
14902 case DW_TAG_inlined_subroutine
:
14903 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14905 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
14906 SYMBOL_INLINED (sym
) = 1;
14907 list_to_add
= cu
->list_in_scope
;
14909 case DW_TAG_template_value_param
:
14911 /* Fall through. */
14912 case DW_TAG_constant
:
14913 case DW_TAG_variable
:
14914 case DW_TAG_member
:
14915 /* Compilation with minimal debug info may result in
14916 variables with missing type entries. Change the
14917 misleading `void' type to something sensible. */
14918 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
14920 = objfile_type (objfile
)->nodebug_data_symbol
;
14922 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14923 /* In the case of DW_TAG_member, we should only be called for
14924 static const members. */
14925 if (die
->tag
== DW_TAG_member
)
14927 /* dwarf2_add_field uses die_is_declaration,
14928 so we do the same. */
14929 gdb_assert (die_is_declaration (die
, cu
));
14934 dwarf2_const_value (attr
, sym
, cu
);
14935 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14938 if (attr2
&& (DW_UNSND (attr2
) != 0))
14939 list_to_add
= &global_symbols
;
14941 list_to_add
= cu
->list_in_scope
;
14945 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14948 var_decode_location (attr
, sym
, cu
);
14949 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14950 if (SYMBOL_CLASS (sym
) == LOC_STATIC
14951 && SYMBOL_VALUE_ADDRESS (sym
) == 0
14952 && !dwarf2_per_objfile
->has_section_at_zero
)
14954 /* When a static variable is eliminated by the linker,
14955 the corresponding debug information is not stripped
14956 out, but the variable address is set to null;
14957 do not add such variables into symbol table. */
14959 else if (attr2
&& (DW_UNSND (attr2
) != 0))
14961 /* Workaround gfortran PR debug/40040 - it uses
14962 DW_AT_location for variables in -fPIC libraries which may
14963 get overriden by other libraries/executable and get
14964 a different address. Resolve it by the minimal symbol
14965 which may come from inferior's executable using copy
14966 relocation. Make this workaround only for gfortran as for
14967 other compilers GDB cannot guess the minimal symbol
14968 Fortran mangling kind. */
14969 if (cu
->language
== language_fortran
&& die
->parent
14970 && die
->parent
->tag
== DW_TAG_module
14972 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
14973 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
14975 /* A variable with DW_AT_external is never static,
14976 but it may be block-scoped. */
14977 list_to_add
= (cu
->list_in_scope
== &file_symbols
14978 ? &global_symbols
: cu
->list_in_scope
);
14981 list_to_add
= cu
->list_in_scope
;
14985 /* We do not know the address of this symbol.
14986 If it is an external symbol and we have type information
14987 for it, enter the symbol as a LOC_UNRESOLVED symbol.
14988 The address of the variable will then be determined from
14989 the minimal symbol table whenever the variable is
14991 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14992 if (attr2
&& (DW_UNSND (attr2
) != 0)
14993 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
14995 /* A variable with DW_AT_external is never static, but it
14996 may be block-scoped. */
14997 list_to_add
= (cu
->list_in_scope
== &file_symbols
14998 ? &global_symbols
: cu
->list_in_scope
);
15000 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15002 else if (!die_is_declaration (die
, cu
))
15004 /* Use the default LOC_OPTIMIZED_OUT class. */
15005 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15007 list_to_add
= cu
->list_in_scope
;
15011 case DW_TAG_formal_parameter
:
15012 /* If we are inside a function, mark this as an argument. If
15013 not, we might be looking at an argument to an inlined function
15014 when we do not have enough information to show inlined frames;
15015 pretend it's a local variable in that case so that the user can
15017 if (context_stack_depth
> 0
15018 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15019 SYMBOL_IS_ARGUMENT (sym
) = 1;
15020 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15023 var_decode_location (attr
, sym
, cu
);
15025 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15028 dwarf2_const_value (attr
, sym
, cu
);
15031 list_to_add
= cu
->list_in_scope
;
15033 case DW_TAG_unspecified_parameters
:
15034 /* From varargs functions; gdb doesn't seem to have any
15035 interest in this information, so just ignore it for now.
15038 case DW_TAG_template_type_param
:
15040 /* Fall through. */
15041 case DW_TAG_class_type
:
15042 case DW_TAG_interface_type
:
15043 case DW_TAG_structure_type
:
15044 case DW_TAG_union_type
:
15045 case DW_TAG_set_type
:
15046 case DW_TAG_enumeration_type
:
15047 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15048 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
15051 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
15052 really ever be static objects: otherwise, if you try
15053 to, say, break of a class's method and you're in a file
15054 which doesn't mention that class, it won't work unless
15055 the check for all static symbols in lookup_symbol_aux
15056 saves you. See the OtherFileClass tests in
15057 gdb.c++/namespace.exp. */
15061 list_to_add
= (cu
->list_in_scope
== &file_symbols
15062 && (cu
->language
== language_cplus
15063 || cu
->language
== language_java
)
15064 ? &global_symbols
: cu
->list_in_scope
);
15066 /* The semantics of C++ state that "struct foo {
15067 ... }" also defines a typedef for "foo". A Java
15068 class declaration also defines a typedef for the
15070 if (cu
->language
== language_cplus
15071 || cu
->language
== language_java
15072 || cu
->language
== language_ada
)
15074 /* The symbol's name is already allocated along
15075 with this objfile, so we don't need to
15076 duplicate it for the type. */
15077 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
15078 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
15083 case DW_TAG_typedef
:
15084 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15085 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15086 list_to_add
= cu
->list_in_scope
;
15088 case DW_TAG_base_type
:
15089 case DW_TAG_subrange_type
:
15090 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15091 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15092 list_to_add
= cu
->list_in_scope
;
15094 case DW_TAG_enumerator
:
15095 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15098 dwarf2_const_value (attr
, sym
, cu
);
15101 /* NOTE: carlton/2003-11-10: See comment above in the
15102 DW_TAG_class_type, etc. block. */
15104 list_to_add
= (cu
->list_in_scope
== &file_symbols
15105 && (cu
->language
== language_cplus
15106 || cu
->language
== language_java
)
15107 ? &global_symbols
: cu
->list_in_scope
);
15110 case DW_TAG_namespace
:
15111 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15112 list_to_add
= &global_symbols
;
15115 /* Not a tag we recognize. Hopefully we aren't processing
15116 trash data, but since we must specifically ignore things
15117 we don't recognize, there is nothing else we should do at
15119 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
15120 dwarf_tag_name (die
->tag
));
15126 sym
->hash_next
= objfile
->template_symbols
;
15127 objfile
->template_symbols
= sym
;
15128 list_to_add
= NULL
;
15131 if (list_to_add
!= NULL
)
15132 add_symbol_to_list (sym
, list_to_add
);
15134 /* For the benefit of old versions of GCC, check for anonymous
15135 namespaces based on the demangled name. */
15136 if (!processing_has_namespace_info
15137 && cu
->language
== language_cplus
)
15138 cp_scan_for_anonymous_namespaces (sym
, objfile
);
15143 /* A wrapper for new_symbol_full that always allocates a new symbol. */
15145 static struct symbol
*
15146 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
15148 return new_symbol_full (die
, type
, cu
, NULL
);
15151 /* Given an attr with a DW_FORM_dataN value in host byte order,
15152 zero-extend it as appropriate for the symbol's type. The DWARF
15153 standard (v4) is not entirely clear about the meaning of using
15154 DW_FORM_dataN for a constant with a signed type, where the type is
15155 wider than the data. The conclusion of a discussion on the DWARF
15156 list was that this is unspecified. We choose to always zero-extend
15157 because that is the interpretation long in use by GCC. */
15160 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
15161 const char *name
, struct obstack
*obstack
,
15162 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
15164 struct objfile
*objfile
= cu
->objfile
;
15165 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
15166 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
15167 LONGEST l
= DW_UNSND (attr
);
15169 if (bits
< sizeof (*value
) * 8)
15171 l
&= ((LONGEST
) 1 << bits
) - 1;
15174 else if (bits
== sizeof (*value
) * 8)
15178 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
15179 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
15186 /* Read a constant value from an attribute. Either set *VALUE, or if
15187 the value does not fit in *VALUE, set *BYTES - either already
15188 allocated on the objfile obstack, or newly allocated on OBSTACK,
15189 or, set *BATON, if we translated the constant to a location
15193 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
15194 const char *name
, struct obstack
*obstack
,
15195 struct dwarf2_cu
*cu
,
15196 LONGEST
*value
, gdb_byte
**bytes
,
15197 struct dwarf2_locexpr_baton
**baton
)
15199 struct objfile
*objfile
= cu
->objfile
;
15200 struct comp_unit_head
*cu_header
= &cu
->header
;
15201 struct dwarf_block
*blk
;
15202 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
15203 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
15209 switch (attr
->form
)
15212 case DW_FORM_GNU_addr_index
:
15216 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
15217 dwarf2_const_value_length_mismatch_complaint (name
,
15218 cu_header
->addr_size
,
15219 TYPE_LENGTH (type
));
15220 /* Symbols of this form are reasonably rare, so we just
15221 piggyback on the existing location code rather than writing
15222 a new implementation of symbol_computed_ops. */
15223 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
15224 sizeof (struct dwarf2_locexpr_baton
));
15225 (*baton
)->per_cu
= cu
->per_cu
;
15226 gdb_assert ((*baton
)->per_cu
);
15228 (*baton
)->size
= 2 + cu_header
->addr_size
;
15229 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
15230 (*baton
)->data
= data
;
15232 data
[0] = DW_OP_addr
;
15233 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
15234 byte_order
, DW_ADDR (attr
));
15235 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
15238 case DW_FORM_string
:
15240 case DW_FORM_GNU_str_index
:
15241 case DW_FORM_GNU_strp_alt
:
15242 /* DW_STRING is already allocated on the objfile obstack, point
15244 *bytes
= (gdb_byte
*) DW_STRING (attr
);
15246 case DW_FORM_block1
:
15247 case DW_FORM_block2
:
15248 case DW_FORM_block4
:
15249 case DW_FORM_block
:
15250 case DW_FORM_exprloc
:
15251 blk
= DW_BLOCK (attr
);
15252 if (TYPE_LENGTH (type
) != blk
->size
)
15253 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
15254 TYPE_LENGTH (type
));
15255 *bytes
= blk
->data
;
15258 /* The DW_AT_const_value attributes are supposed to carry the
15259 symbol's value "represented as it would be on the target
15260 architecture." By the time we get here, it's already been
15261 converted to host endianness, so we just need to sign- or
15262 zero-extend it as appropriate. */
15263 case DW_FORM_data1
:
15264 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15265 obstack
, cu
, value
, 8);
15267 case DW_FORM_data2
:
15268 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15269 obstack
, cu
, value
, 16);
15271 case DW_FORM_data4
:
15272 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15273 obstack
, cu
, value
, 32);
15275 case DW_FORM_data8
:
15276 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15277 obstack
, cu
, value
, 64);
15280 case DW_FORM_sdata
:
15281 *value
= DW_SND (attr
);
15284 case DW_FORM_udata
:
15285 *value
= DW_UNSND (attr
);
15289 complaint (&symfile_complaints
,
15290 _("unsupported const value attribute form: '%s'"),
15291 dwarf_form_name (attr
->form
));
15298 /* Copy constant value from an attribute to a symbol. */
15301 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
15302 struct dwarf2_cu
*cu
)
15304 struct objfile
*objfile
= cu
->objfile
;
15305 struct comp_unit_head
*cu_header
= &cu
->header
;
15308 struct dwarf2_locexpr_baton
*baton
;
15310 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
15311 SYMBOL_PRINT_NAME (sym
),
15312 &objfile
->objfile_obstack
, cu
,
15313 &value
, &bytes
, &baton
);
15317 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
15318 SYMBOL_LOCATION_BATON (sym
) = baton
;
15319 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15321 else if (bytes
!= NULL
)
15323 SYMBOL_VALUE_BYTES (sym
) = bytes
;
15324 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
15328 SYMBOL_VALUE (sym
) = value
;
15329 SYMBOL_CLASS (sym
) = LOC_CONST
;
15333 /* Return the type of the die in question using its DW_AT_type attribute. */
15335 static struct type
*
15336 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15338 struct attribute
*type_attr
;
15340 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15343 /* A missing DW_AT_type represents a void type. */
15344 return objfile_type (cu
->objfile
)->builtin_void
;
15347 return lookup_die_type (die
, type_attr
, cu
);
15350 /* True iff CU's producer generates GNAT Ada auxiliary information
15351 that allows to find parallel types through that information instead
15352 of having to do expensive parallel lookups by type name. */
15355 need_gnat_info (struct dwarf2_cu
*cu
)
15357 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
15358 of GNAT produces this auxiliary information, without any indication
15359 that it is produced. Part of enhancing the FSF version of GNAT
15360 to produce that information will be to put in place an indicator
15361 that we can use in order to determine whether the descriptive type
15362 info is available or not. One suggestion that has been made is
15363 to use a new attribute, attached to the CU die. For now, assume
15364 that the descriptive type info is not available. */
15368 /* Return the auxiliary type of the die in question using its
15369 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
15370 attribute is not present. */
15372 static struct type
*
15373 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15375 struct attribute
*type_attr
;
15377 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
15381 return lookup_die_type (die
, type_attr
, cu
);
15384 /* If DIE has a descriptive_type attribute, then set the TYPE's
15385 descriptive type accordingly. */
15388 set_descriptive_type (struct type
*type
, struct die_info
*die
,
15389 struct dwarf2_cu
*cu
)
15391 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
15393 if (descriptive_type
)
15395 ALLOCATE_GNAT_AUX_TYPE (type
);
15396 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
15400 /* Return the containing type of the die in question using its
15401 DW_AT_containing_type attribute. */
15403 static struct type
*
15404 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15406 struct attribute
*type_attr
;
15408 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
15410 error (_("Dwarf Error: Problem turning containing type into gdb type "
15411 "[in module %s]"), cu
->objfile
->name
);
15413 return lookup_die_type (die
, type_attr
, cu
);
15416 /* Look up the type of DIE in CU using its type attribute ATTR.
15417 If there is no type substitute an error marker. */
15419 static struct type
*
15420 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
15421 struct dwarf2_cu
*cu
)
15423 struct objfile
*objfile
= cu
->objfile
;
15424 struct type
*this_type
;
15426 /* First see if we have it cached. */
15428 if (attr
->form
== DW_FORM_GNU_ref_alt
)
15430 struct dwarf2_per_cu_data
*per_cu
;
15431 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15433 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
15434 this_type
= get_die_type_at_offset (offset
, per_cu
);
15436 else if (is_ref_attr (attr
))
15438 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15440 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
15442 else if (attr
->form
== DW_FORM_ref_sig8
)
15444 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
15446 /* sig_type will be NULL if the signatured type is missing from
15448 if (sig_type
== NULL
)
15449 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
15450 "at 0x%x [in module %s]"),
15451 die
->offset
.sect_off
, objfile
->name
);
15453 gdb_assert (sig_type
->per_cu
.is_debug_types
);
15454 /* If we haven't filled in type_offset_in_section yet, then we
15455 haven't read the type in yet. */
15457 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
15460 get_die_type_at_offset (sig_type
->type_offset_in_section
,
15461 &sig_type
->per_cu
);
15466 dump_die_for_error (die
);
15467 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
15468 dwarf_attr_name (attr
->name
), objfile
->name
);
15471 /* If not cached we need to read it in. */
15473 if (this_type
== NULL
)
15475 struct die_info
*type_die
;
15476 struct dwarf2_cu
*type_cu
= cu
;
15478 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
15479 /* If we found the type now, it's probably because the type came
15480 from an inter-CU reference and the type's CU got expanded before
15482 this_type
= get_die_type (type_die
, type_cu
);
15483 if (this_type
== NULL
)
15484 this_type
= read_type_die_1 (type_die
, type_cu
);
15487 /* If we still don't have a type use an error marker. */
15489 if (this_type
== NULL
)
15491 char *message
, *saved
;
15493 /* read_type_die already issued a complaint. */
15494 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
15496 cu
->header
.offset
.sect_off
,
15497 die
->offset
.sect_off
);
15498 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
15499 message
, strlen (message
));
15502 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
15508 /* Return the type in DIE, CU.
15509 Returns NULL for invalid types.
15511 This first does a lookup in the appropriate type_hash table,
15512 and only reads the die in if necessary.
15514 NOTE: This can be called when reading in partial or full symbols. */
15516 static struct type
*
15517 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
15519 struct type
*this_type
;
15521 this_type
= get_die_type (die
, cu
);
15525 return read_type_die_1 (die
, cu
);
15528 /* Read the type in DIE, CU.
15529 Returns NULL for invalid types. */
15531 static struct type
*
15532 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
15534 struct type
*this_type
= NULL
;
15538 case DW_TAG_class_type
:
15539 case DW_TAG_interface_type
:
15540 case DW_TAG_structure_type
:
15541 case DW_TAG_union_type
:
15542 this_type
= read_structure_type (die
, cu
);
15544 case DW_TAG_enumeration_type
:
15545 this_type
= read_enumeration_type (die
, cu
);
15547 case DW_TAG_subprogram
:
15548 case DW_TAG_subroutine_type
:
15549 case DW_TAG_inlined_subroutine
:
15550 this_type
= read_subroutine_type (die
, cu
);
15552 case DW_TAG_array_type
:
15553 this_type
= read_array_type (die
, cu
);
15555 case DW_TAG_set_type
:
15556 this_type
= read_set_type (die
, cu
);
15558 case DW_TAG_pointer_type
:
15559 this_type
= read_tag_pointer_type (die
, cu
);
15561 case DW_TAG_ptr_to_member_type
:
15562 this_type
= read_tag_ptr_to_member_type (die
, cu
);
15564 case DW_TAG_reference_type
:
15565 this_type
= read_tag_reference_type (die
, cu
);
15567 case DW_TAG_const_type
:
15568 this_type
= read_tag_const_type (die
, cu
);
15570 case DW_TAG_volatile_type
:
15571 this_type
= read_tag_volatile_type (die
, cu
);
15573 case DW_TAG_string_type
:
15574 this_type
= read_tag_string_type (die
, cu
);
15576 case DW_TAG_typedef
:
15577 this_type
= read_typedef (die
, cu
);
15579 case DW_TAG_subrange_type
:
15580 this_type
= read_subrange_type (die
, cu
);
15582 case DW_TAG_base_type
:
15583 this_type
= read_base_type (die
, cu
);
15585 case DW_TAG_unspecified_type
:
15586 this_type
= read_unspecified_type (die
, cu
);
15588 case DW_TAG_namespace
:
15589 this_type
= read_namespace_type (die
, cu
);
15591 case DW_TAG_module
:
15592 this_type
= read_module_type (die
, cu
);
15595 complaint (&symfile_complaints
,
15596 _("unexpected tag in read_type_die: '%s'"),
15597 dwarf_tag_name (die
->tag
));
15604 /* See if we can figure out if the class lives in a namespace. We do
15605 this by looking for a member function; its demangled name will
15606 contain namespace info, if there is any.
15607 Return the computed name or NULL.
15608 Space for the result is allocated on the objfile's obstack.
15609 This is the full-die version of guess_partial_die_structure_name.
15610 In this case we know DIE has no useful parent. */
15613 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
15615 struct die_info
*spec_die
;
15616 struct dwarf2_cu
*spec_cu
;
15617 struct die_info
*child
;
15620 spec_die
= die_specification (die
, &spec_cu
);
15621 if (spec_die
!= NULL
)
15627 for (child
= die
->child
;
15629 child
= child
->sibling
)
15631 if (child
->tag
== DW_TAG_subprogram
)
15633 struct attribute
*attr
;
15635 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
15637 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
15641 = language_class_name_from_physname (cu
->language_defn
,
15645 if (actual_name
!= NULL
)
15647 char *die_name
= dwarf2_name (die
, cu
);
15649 if (die_name
!= NULL
15650 && strcmp (die_name
, actual_name
) != 0)
15652 /* Strip off the class name from the full name.
15653 We want the prefix. */
15654 int die_name_len
= strlen (die_name
);
15655 int actual_name_len
= strlen (actual_name
);
15657 /* Test for '::' as a sanity check. */
15658 if (actual_name_len
> die_name_len
+ 2
15659 && actual_name
[actual_name_len
15660 - die_name_len
- 1] == ':')
15662 obsavestring (actual_name
,
15663 actual_name_len
- die_name_len
- 2,
15664 &cu
->objfile
->objfile_obstack
);
15667 xfree (actual_name
);
15676 /* GCC might emit a nameless typedef that has a linkage name. Determine the
15677 prefix part in such case. See
15678 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15681 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
15683 struct attribute
*attr
;
15686 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
15687 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
15690 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
15691 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
15694 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
15696 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
15697 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
15700 /* dwarf2_name had to be already called. */
15701 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
15703 /* Strip the base name, keep any leading namespaces/classes. */
15704 base
= strrchr (DW_STRING (attr
), ':');
15705 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
15708 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
15709 &cu
->objfile
->objfile_obstack
);
15712 /* Return the name of the namespace/class that DIE is defined within,
15713 or "" if we can't tell. The caller should not xfree the result.
15715 For example, if we're within the method foo() in the following
15725 then determine_prefix on foo's die will return "N::C". */
15727 static const char *
15728 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
15730 struct die_info
*parent
, *spec_die
;
15731 struct dwarf2_cu
*spec_cu
;
15732 struct type
*parent_type
;
15735 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
15736 && cu
->language
!= language_fortran
)
15739 retval
= anonymous_struct_prefix (die
, cu
);
15743 /* We have to be careful in the presence of DW_AT_specification.
15744 For example, with GCC 3.4, given the code
15748 // Definition of N::foo.
15752 then we'll have a tree of DIEs like this:
15754 1: DW_TAG_compile_unit
15755 2: DW_TAG_namespace // N
15756 3: DW_TAG_subprogram // declaration of N::foo
15757 4: DW_TAG_subprogram // definition of N::foo
15758 DW_AT_specification // refers to die #3
15760 Thus, when processing die #4, we have to pretend that we're in
15761 the context of its DW_AT_specification, namely the contex of die
15764 spec_die
= die_specification (die
, &spec_cu
);
15765 if (spec_die
== NULL
)
15766 parent
= die
->parent
;
15769 parent
= spec_die
->parent
;
15773 if (parent
== NULL
)
15775 else if (parent
->building_fullname
)
15778 const char *parent_name
;
15780 /* It has been seen on RealView 2.2 built binaries,
15781 DW_TAG_template_type_param types actually _defined_ as
15782 children of the parent class:
15785 template class <class Enum> Class{};
15786 Class<enum E> class_e;
15788 1: DW_TAG_class_type (Class)
15789 2: DW_TAG_enumeration_type (E)
15790 3: DW_TAG_enumerator (enum1:0)
15791 3: DW_TAG_enumerator (enum2:1)
15793 2: DW_TAG_template_type_param
15794 DW_AT_type DW_FORM_ref_udata (E)
15796 Besides being broken debug info, it can put GDB into an
15797 infinite loop. Consider:
15799 When we're building the full name for Class<E>, we'll start
15800 at Class, and go look over its template type parameters,
15801 finding E. We'll then try to build the full name of E, and
15802 reach here. We're now trying to build the full name of E,
15803 and look over the parent DIE for containing scope. In the
15804 broken case, if we followed the parent DIE of E, we'd again
15805 find Class, and once again go look at its template type
15806 arguments, etc., etc. Simply don't consider such parent die
15807 as source-level parent of this die (it can't be, the language
15808 doesn't allow it), and break the loop here. */
15809 name
= dwarf2_name (die
, cu
);
15810 parent_name
= dwarf2_name (parent
, cu
);
15811 complaint (&symfile_complaints
,
15812 _("template param type '%s' defined within parent '%s'"),
15813 name
? name
: "<unknown>",
15814 parent_name
? parent_name
: "<unknown>");
15818 switch (parent
->tag
)
15820 case DW_TAG_namespace
:
15821 parent_type
= read_type_die (parent
, cu
);
15822 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
15823 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
15824 Work around this problem here. */
15825 if (cu
->language
== language_cplus
15826 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
15828 /* We give a name to even anonymous namespaces. */
15829 return TYPE_TAG_NAME (parent_type
);
15830 case DW_TAG_class_type
:
15831 case DW_TAG_interface_type
:
15832 case DW_TAG_structure_type
:
15833 case DW_TAG_union_type
:
15834 case DW_TAG_module
:
15835 parent_type
= read_type_die (parent
, cu
);
15836 if (TYPE_TAG_NAME (parent_type
) != NULL
)
15837 return TYPE_TAG_NAME (parent_type
);
15839 /* An anonymous structure is only allowed non-static data
15840 members; no typedefs, no member functions, et cetera.
15841 So it does not need a prefix. */
15843 case DW_TAG_compile_unit
:
15844 case DW_TAG_partial_unit
:
15845 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
15846 if (cu
->language
== language_cplus
15847 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
15848 && die
->child
!= NULL
15849 && (die
->tag
== DW_TAG_class_type
15850 || die
->tag
== DW_TAG_structure_type
15851 || die
->tag
== DW_TAG_union_type
))
15853 char *name
= guess_full_die_structure_name (die
, cu
);
15859 return determine_prefix (parent
, cu
);
15863 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
15864 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
15865 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
15866 an obconcat, otherwise allocate storage for the result. The CU argument is
15867 used to determine the language and hence, the appropriate separator. */
15869 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
15872 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
15873 int physname
, struct dwarf2_cu
*cu
)
15875 const char *lead
= "";
15878 if (suffix
== NULL
|| suffix
[0] == '\0'
15879 || prefix
== NULL
|| prefix
[0] == '\0')
15881 else if (cu
->language
== language_java
)
15883 else if (cu
->language
== language_fortran
&& physname
)
15885 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
15886 DW_AT_MIPS_linkage_name is preferred and used instead. */
15894 if (prefix
== NULL
)
15896 if (suffix
== NULL
)
15902 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
15904 strcpy (retval
, lead
);
15905 strcat (retval
, prefix
);
15906 strcat (retval
, sep
);
15907 strcat (retval
, suffix
);
15912 /* We have an obstack. */
15913 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
15917 /* Return sibling of die, NULL if no sibling. */
15919 static struct die_info
*
15920 sibling_die (struct die_info
*die
)
15922 return die
->sibling
;
15925 /* Get name of a die, return NULL if not found. */
15928 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
15929 struct obstack
*obstack
)
15931 if (name
&& cu
->language
== language_cplus
)
15933 char *canon_name
= cp_canonicalize_string (name
);
15935 if (canon_name
!= NULL
)
15937 if (strcmp (canon_name
, name
) != 0)
15938 name
= obsavestring (canon_name
, strlen (canon_name
),
15940 xfree (canon_name
);
15947 /* Get name of a die, return NULL if not found. */
15950 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
15952 struct attribute
*attr
;
15954 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
15955 if ((!attr
|| !DW_STRING (attr
))
15956 && die
->tag
!= DW_TAG_class_type
15957 && die
->tag
!= DW_TAG_interface_type
15958 && die
->tag
!= DW_TAG_structure_type
15959 && die
->tag
!= DW_TAG_union_type
)
15964 case DW_TAG_compile_unit
:
15965 case DW_TAG_partial_unit
:
15966 /* Compilation units have a DW_AT_name that is a filename, not
15967 a source language identifier. */
15968 case DW_TAG_enumeration_type
:
15969 case DW_TAG_enumerator
:
15970 /* These tags always have simple identifiers already; no need
15971 to canonicalize them. */
15972 return DW_STRING (attr
);
15974 case DW_TAG_subprogram
:
15975 /* Java constructors will all be named "<init>", so return
15976 the class name when we see this special case. */
15977 if (cu
->language
== language_java
15978 && DW_STRING (attr
) != NULL
15979 && strcmp (DW_STRING (attr
), "<init>") == 0)
15981 struct dwarf2_cu
*spec_cu
= cu
;
15982 struct die_info
*spec_die
;
15984 /* GCJ will output '<init>' for Java constructor names.
15985 For this special case, return the name of the parent class. */
15987 /* GCJ may output suprogram DIEs with AT_specification set.
15988 If so, use the name of the specified DIE. */
15989 spec_die
= die_specification (die
, &spec_cu
);
15990 if (spec_die
!= NULL
)
15991 return dwarf2_name (spec_die
, spec_cu
);
15996 if (die
->tag
== DW_TAG_class_type
)
15997 return dwarf2_name (die
, cu
);
15999 while (die
->tag
!= DW_TAG_compile_unit
16000 && die
->tag
!= DW_TAG_partial_unit
);
16004 case DW_TAG_class_type
:
16005 case DW_TAG_interface_type
:
16006 case DW_TAG_structure_type
:
16007 case DW_TAG_union_type
:
16008 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16009 structures or unions. These were of the form "._%d" in GCC 4.1,
16010 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16011 and GCC 4.4. We work around this problem by ignoring these. */
16012 if (attr
&& DW_STRING (attr
)
16013 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16014 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16017 /* GCC might emit a nameless typedef that has a linkage name. See
16018 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16019 if (!attr
|| DW_STRING (attr
) == NULL
)
16021 char *demangled
= NULL
;
16023 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16025 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16027 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16030 /* Avoid demangling DW_STRING (attr) the second time on a second
16031 call for the same DIE. */
16032 if (!DW_STRING_IS_CANONICAL (attr
))
16033 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
16039 /* FIXME: we already did this for the partial symbol... */
16040 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
16041 &cu
->objfile
->objfile_obstack
);
16042 DW_STRING_IS_CANONICAL (attr
) = 1;
16045 /* Strip any leading namespaces/classes, keep only the base name.
16046 DW_AT_name for named DIEs does not contain the prefixes. */
16047 base
= strrchr (DW_STRING (attr
), ':');
16048 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
16051 return DW_STRING (attr
);
16060 if (!DW_STRING_IS_CANONICAL (attr
))
16063 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
16064 &cu
->objfile
->objfile_obstack
);
16065 DW_STRING_IS_CANONICAL (attr
) = 1;
16067 return DW_STRING (attr
);
16070 /* Return the die that this die in an extension of, or NULL if there
16071 is none. *EXT_CU is the CU containing DIE on input, and the CU
16072 containing the return value on output. */
16074 static struct die_info
*
16075 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
16077 struct attribute
*attr
;
16079 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
16083 return follow_die_ref (die
, attr
, ext_cu
);
16086 /* Convert a DIE tag into its string name. */
16088 static const char *
16089 dwarf_tag_name (unsigned tag
)
16091 const char *name
= get_DW_TAG_name (tag
);
16094 return "DW_TAG_<unknown>";
16099 /* Convert a DWARF attribute code into its string name. */
16101 static const char *
16102 dwarf_attr_name (unsigned attr
)
16106 #ifdef MIPS /* collides with DW_AT_HP_block_index */
16107 if (attr
== DW_AT_MIPS_fde
)
16108 return "DW_AT_MIPS_fde";
16110 if (attr
== DW_AT_HP_block_index
)
16111 return "DW_AT_HP_block_index";
16114 name
= get_DW_AT_name (attr
);
16117 return "DW_AT_<unknown>";
16122 /* Convert a DWARF value form code into its string name. */
16124 static const char *
16125 dwarf_form_name (unsigned form
)
16127 const char *name
= get_DW_FORM_name (form
);
16130 return "DW_FORM_<unknown>";
16136 dwarf_bool_name (unsigned mybool
)
16144 /* Convert a DWARF type code into its string name. */
16146 static const char *
16147 dwarf_type_encoding_name (unsigned enc
)
16149 const char *name
= get_DW_ATE_name (enc
);
16152 return "DW_ATE_<unknown>";
16158 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
16162 print_spaces (indent
, f
);
16163 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
16164 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
16166 if (die
->parent
!= NULL
)
16168 print_spaces (indent
, f
);
16169 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
16170 die
->parent
->offset
.sect_off
);
16173 print_spaces (indent
, f
);
16174 fprintf_unfiltered (f
, " has children: %s\n",
16175 dwarf_bool_name (die
->child
!= NULL
));
16177 print_spaces (indent
, f
);
16178 fprintf_unfiltered (f
, " attributes:\n");
16180 for (i
= 0; i
< die
->num_attrs
; ++i
)
16182 print_spaces (indent
, f
);
16183 fprintf_unfiltered (f
, " %s (%s) ",
16184 dwarf_attr_name (die
->attrs
[i
].name
),
16185 dwarf_form_name (die
->attrs
[i
].form
));
16187 switch (die
->attrs
[i
].form
)
16190 case DW_FORM_GNU_addr_index
:
16191 fprintf_unfiltered (f
, "address: ");
16192 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
16194 case DW_FORM_block2
:
16195 case DW_FORM_block4
:
16196 case DW_FORM_block
:
16197 case DW_FORM_block1
:
16198 fprintf_unfiltered (f
, "block: size %d",
16199 DW_BLOCK (&die
->attrs
[i
])->size
);
16201 case DW_FORM_exprloc
:
16202 fprintf_unfiltered (f
, "expression: size %u",
16203 DW_BLOCK (&die
->attrs
[i
])->size
);
16205 case DW_FORM_ref_addr
:
16206 fprintf_unfiltered (f
, "ref address: ");
16207 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
16209 case DW_FORM_GNU_ref_alt
:
16210 fprintf_unfiltered (f
, "alt ref address: ");
16211 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
16217 case DW_FORM_ref_udata
:
16218 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
16219 (long) (DW_UNSND (&die
->attrs
[i
])));
16221 case DW_FORM_data1
:
16222 case DW_FORM_data2
:
16223 case DW_FORM_data4
:
16224 case DW_FORM_data8
:
16225 case DW_FORM_udata
:
16226 case DW_FORM_sdata
:
16227 fprintf_unfiltered (f
, "constant: %s",
16228 pulongest (DW_UNSND (&die
->attrs
[i
])));
16230 case DW_FORM_sec_offset
:
16231 fprintf_unfiltered (f
, "section offset: %s",
16232 pulongest (DW_UNSND (&die
->attrs
[i
])));
16234 case DW_FORM_ref_sig8
:
16235 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
16236 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
16237 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
16239 fprintf_unfiltered (f
, "signatured type, offset: unknown");
16241 case DW_FORM_string
:
16243 case DW_FORM_GNU_str_index
:
16244 case DW_FORM_GNU_strp_alt
:
16245 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
16246 DW_STRING (&die
->attrs
[i
])
16247 ? DW_STRING (&die
->attrs
[i
]) : "",
16248 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
16251 if (DW_UNSND (&die
->attrs
[i
]))
16252 fprintf_unfiltered (f
, "flag: TRUE");
16254 fprintf_unfiltered (f
, "flag: FALSE");
16256 case DW_FORM_flag_present
:
16257 fprintf_unfiltered (f
, "flag: TRUE");
16259 case DW_FORM_indirect
:
16260 /* The reader will have reduced the indirect form to
16261 the "base form" so this form should not occur. */
16262 fprintf_unfiltered (f
,
16263 "unexpected attribute form: DW_FORM_indirect");
16266 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
16267 die
->attrs
[i
].form
);
16270 fprintf_unfiltered (f
, "\n");
16275 dump_die_for_error (struct die_info
*die
)
16277 dump_die_shallow (gdb_stderr
, 0, die
);
16281 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
16283 int indent
= level
* 4;
16285 gdb_assert (die
!= NULL
);
16287 if (level
>= max_level
)
16290 dump_die_shallow (f
, indent
, die
);
16292 if (die
->child
!= NULL
)
16294 print_spaces (indent
, f
);
16295 fprintf_unfiltered (f
, " Children:");
16296 if (level
+ 1 < max_level
)
16298 fprintf_unfiltered (f
, "\n");
16299 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
16303 fprintf_unfiltered (f
,
16304 " [not printed, max nesting level reached]\n");
16308 if (die
->sibling
!= NULL
&& level
> 0)
16310 dump_die_1 (f
, level
, max_level
, die
->sibling
);
16314 /* This is called from the pdie macro in gdbinit.in.
16315 It's not static so gcc will keep a copy callable from gdb. */
16318 dump_die (struct die_info
*die
, int max_level
)
16320 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
16324 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
16328 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
16334 /* DW_ADDR is always stored already as sect_offset; despite for the forms
16335 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
16338 is_ref_attr (struct attribute
*attr
)
16340 switch (attr
->form
)
16342 case DW_FORM_ref_addr
:
16347 case DW_FORM_ref_udata
:
16348 case DW_FORM_GNU_ref_alt
:
16355 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
16359 dwarf2_get_ref_die_offset (struct attribute
*attr
)
16361 sect_offset retval
= { DW_UNSND (attr
) };
16363 if (is_ref_attr (attr
))
16366 retval
.sect_off
= 0;
16367 complaint (&symfile_complaints
,
16368 _("unsupported die ref attribute form: '%s'"),
16369 dwarf_form_name (attr
->form
));
16373 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
16374 * the value held by the attribute is not constant. */
16377 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
16379 if (attr
->form
== DW_FORM_sdata
)
16380 return DW_SND (attr
);
16381 else if (attr
->form
== DW_FORM_udata
16382 || attr
->form
== DW_FORM_data1
16383 || attr
->form
== DW_FORM_data2
16384 || attr
->form
== DW_FORM_data4
16385 || attr
->form
== DW_FORM_data8
)
16386 return DW_UNSND (attr
);
16389 complaint (&symfile_complaints
,
16390 _("Attribute value is not a constant (%s)"),
16391 dwarf_form_name (attr
->form
));
16392 return default_value
;
16396 /* Follow reference or signature attribute ATTR of SRC_DIE.
16397 On entry *REF_CU is the CU of SRC_DIE.
16398 On exit *REF_CU is the CU of the result. */
16400 static struct die_info
*
16401 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
16402 struct dwarf2_cu
**ref_cu
)
16404 struct die_info
*die
;
16406 if (is_ref_attr (attr
))
16407 die
= follow_die_ref (src_die
, attr
, ref_cu
);
16408 else if (attr
->form
== DW_FORM_ref_sig8
)
16409 die
= follow_die_sig (src_die
, attr
, ref_cu
);
16412 dump_die_for_error (src_die
);
16413 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
16414 (*ref_cu
)->objfile
->name
);
16420 /* Follow reference OFFSET.
16421 On entry *REF_CU is the CU of the source die referencing OFFSET.
16422 On exit *REF_CU is the CU of the result.
16423 Returns NULL if OFFSET is invalid. */
16425 static struct die_info
*
16426 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
16427 struct dwarf2_cu
**ref_cu
)
16429 struct die_info temp_die
;
16430 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
16432 gdb_assert (cu
->per_cu
!= NULL
);
16436 if (cu
->per_cu
->is_debug_types
)
16438 /* .debug_types CUs cannot reference anything outside their CU.
16439 If they need to, they have to reference a signatured type via
16440 DW_FORM_ref_sig8. */
16441 if (! offset_in_cu_p (&cu
->header
, offset
))
16444 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
16445 || ! offset_in_cu_p (&cu
->header
, offset
))
16447 struct dwarf2_per_cu_data
*per_cu
;
16449 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16452 /* If necessary, add it to the queue and load its DIEs. */
16453 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
16454 load_full_comp_unit (per_cu
, cu
->language
);
16456 target_cu
= per_cu
->cu
;
16458 else if (cu
->dies
== NULL
)
16460 /* We're loading full DIEs during partial symbol reading. */
16461 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
16462 load_full_comp_unit (cu
->per_cu
, language_minimal
);
16465 *ref_cu
= target_cu
;
16466 temp_die
.offset
= offset
;
16467 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
16470 /* Follow reference attribute ATTR of SRC_DIE.
16471 On entry *REF_CU is the CU of SRC_DIE.
16472 On exit *REF_CU is the CU of the result. */
16474 static struct die_info
*
16475 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
16476 struct dwarf2_cu
**ref_cu
)
16478 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16479 struct dwarf2_cu
*cu
= *ref_cu
;
16480 struct die_info
*die
;
16482 die
= follow_die_offset (offset
,
16483 (attr
->form
== DW_FORM_GNU_ref_alt
16484 || cu
->per_cu
->is_dwz
),
16487 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
16488 "at 0x%x [in module %s]"),
16489 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
16494 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
16495 Returned value is intended for DW_OP_call*. Returned
16496 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
16498 struct dwarf2_locexpr_baton
16499 dwarf2_fetch_die_location_block (cu_offset offset_in_cu
,
16500 struct dwarf2_per_cu_data
*per_cu
,
16501 CORE_ADDR (*get_frame_pc
) (void *baton
),
16504 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
16505 struct dwarf2_cu
*cu
;
16506 struct die_info
*die
;
16507 struct attribute
*attr
;
16508 struct dwarf2_locexpr_baton retval
;
16510 dw2_setup (per_cu
->objfile
);
16512 if (per_cu
->cu
== NULL
)
16516 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
16518 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
16519 offset
.sect_off
, per_cu
->objfile
->name
);
16521 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16524 /* DWARF: "If there is no such attribute, then there is no effect.".
16525 DATA is ignored if SIZE is 0. */
16527 retval
.data
= NULL
;
16530 else if (attr_form_is_section_offset (attr
))
16532 struct dwarf2_loclist_baton loclist_baton
;
16533 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
16536 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
16538 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
16540 retval
.size
= size
;
16544 if (!attr_form_is_block (attr
))
16545 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
16546 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
16547 offset
.sect_off
, per_cu
->objfile
->name
);
16549 retval
.data
= DW_BLOCK (attr
)->data
;
16550 retval
.size
= DW_BLOCK (attr
)->size
;
16552 retval
.per_cu
= cu
->per_cu
;
16554 age_cached_comp_units ();
16559 /* Return the type of the DIE at DIE_OFFSET in the CU named by
16563 dwarf2_get_die_type (cu_offset die_offset
,
16564 struct dwarf2_per_cu_data
*per_cu
)
16566 sect_offset die_offset_sect
;
16568 dw2_setup (per_cu
->objfile
);
16570 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
16571 return get_die_type_at_offset (die_offset_sect
, per_cu
);
16574 /* Follow the signature attribute ATTR in SRC_DIE.
16575 On entry *REF_CU is the CU of SRC_DIE.
16576 On exit *REF_CU is the CU of the result. */
16578 static struct die_info
*
16579 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
16580 struct dwarf2_cu
**ref_cu
)
16582 struct objfile
*objfile
= (*ref_cu
)->objfile
;
16583 struct die_info temp_die
;
16584 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16585 struct dwarf2_cu
*sig_cu
;
16586 struct die_info
*die
;
16588 /* sig_type will be NULL if the signatured type is missing from
16590 if (sig_type
== NULL
)
16591 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16592 "at 0x%x [in module %s]"),
16593 src_die
->offset
.sect_off
, objfile
->name
);
16595 /* If necessary, add it to the queue and load its DIEs. */
16597 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
16598 read_signatured_type (sig_type
);
16600 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
16602 sig_cu
= sig_type
->per_cu
.cu
;
16603 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
16604 temp_die
.offset
= sig_type
->type_offset_in_section
;
16605 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
16606 temp_die
.offset
.sect_off
);
16613 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
16614 "from DIE at 0x%x [in module %s]"),
16615 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
16618 /* Given an offset of a signatured type, return its signatured_type. */
16620 static struct signatured_type
*
16621 lookup_signatured_type_at_offset (struct objfile
*objfile
,
16622 struct dwarf2_section_info
*section
,
16623 sect_offset offset
)
16625 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
16626 unsigned int length
, initial_length_size
;
16627 unsigned int sig_offset
;
16628 struct signatured_type find_entry
, *sig_type
;
16630 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
16631 sig_offset
= (initial_length_size
16633 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
16634 + 1 /*address_size*/);
16635 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
16636 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
16638 /* This is only used to lookup previously recorded types.
16639 If we didn't find it, it's our bug. */
16640 gdb_assert (sig_type
!= NULL
);
16641 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
16646 /* Load the DIEs associated with type unit PER_CU into memory. */
16649 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
16651 struct signatured_type
*sig_type
;
16653 /* Caller is responsible for ensuring type_unit_groups don't get here. */
16654 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
16656 /* We have the per_cu, but we need the signatured_type.
16657 Fortunately this is an easy translation. */
16658 gdb_assert (per_cu
->is_debug_types
);
16659 sig_type
= (struct signatured_type
*) per_cu
;
16661 gdb_assert (per_cu
->cu
== NULL
);
16663 read_signatured_type (sig_type
);
16665 gdb_assert (per_cu
->cu
!= NULL
);
16668 /* die_reader_func for read_signatured_type.
16669 This is identical to load_full_comp_unit_reader,
16670 but is kept separate for now. */
16673 read_signatured_type_reader (const struct die_reader_specs
*reader
,
16674 gdb_byte
*info_ptr
,
16675 struct die_info
*comp_unit_die
,
16679 struct dwarf2_cu
*cu
= reader
->cu
;
16681 gdb_assert (cu
->die_hash
== NULL
);
16683 htab_create_alloc_ex (cu
->header
.length
/ 12,
16687 &cu
->comp_unit_obstack
,
16688 hashtab_obstack_allocate
,
16689 dummy_obstack_deallocate
);
16692 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
16693 &info_ptr
, comp_unit_die
);
16694 cu
->dies
= comp_unit_die
;
16695 /* comp_unit_die is not stored in die_hash, no need. */
16697 /* We try not to read any attributes in this function, because not
16698 all CUs needed for references have been loaded yet, and symbol
16699 table processing isn't initialized. But we have to set the CU language,
16700 or we won't be able to build types correctly.
16701 Similarly, if we do not read the producer, we can not apply
16702 producer-specific interpretation. */
16703 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
16706 /* Read in a signatured type and build its CU and DIEs.
16707 If the type is a stub for the real type in a DWO file,
16708 read in the real type from the DWO file as well. */
16711 read_signatured_type (struct signatured_type
*sig_type
)
16713 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
16715 gdb_assert (per_cu
->is_debug_types
);
16716 gdb_assert (per_cu
->cu
== NULL
);
16718 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
16719 read_signatured_type_reader
, NULL
);
16722 /* Decode simple location descriptions.
16723 Given a pointer to a dwarf block that defines a location, compute
16724 the location and return the value.
16726 NOTE drow/2003-11-18: This function is called in two situations
16727 now: for the address of static or global variables (partial symbols
16728 only) and for offsets into structures which are expected to be
16729 (more or less) constant. The partial symbol case should go away,
16730 and only the constant case should remain. That will let this
16731 function complain more accurately. A few special modes are allowed
16732 without complaint for global variables (for instance, global
16733 register values and thread-local values).
16735 A location description containing no operations indicates that the
16736 object is optimized out. The return value is 0 for that case.
16737 FIXME drow/2003-11-16: No callers check for this case any more; soon all
16738 callers will only want a very basic result and this can become a
16741 Note that stack[0] is unused except as a default error return. */
16744 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
16746 struct objfile
*objfile
= cu
->objfile
;
16748 int size
= blk
->size
;
16749 gdb_byte
*data
= blk
->data
;
16750 CORE_ADDR stack
[64];
16752 unsigned int bytes_read
, unsnd
;
16758 stack
[++stacki
] = 0;
16797 stack
[++stacki
] = op
- DW_OP_lit0
;
16832 stack
[++stacki
] = op
- DW_OP_reg0
;
16834 dwarf2_complex_location_expr_complaint ();
16838 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
16840 stack
[++stacki
] = unsnd
;
16842 dwarf2_complex_location_expr_complaint ();
16846 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
16851 case DW_OP_const1u
:
16852 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
16856 case DW_OP_const1s
:
16857 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
16861 case DW_OP_const2u
:
16862 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
16866 case DW_OP_const2s
:
16867 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
16871 case DW_OP_const4u
:
16872 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
16876 case DW_OP_const4s
:
16877 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
16881 case DW_OP_const8u
:
16882 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
16887 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
16893 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
16898 stack
[stacki
+ 1] = stack
[stacki
];
16903 stack
[stacki
- 1] += stack
[stacki
];
16907 case DW_OP_plus_uconst
:
16908 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
16914 stack
[stacki
- 1] -= stack
[stacki
];
16919 /* If we're not the last op, then we definitely can't encode
16920 this using GDB's address_class enum. This is valid for partial
16921 global symbols, although the variable's address will be bogus
16924 dwarf2_complex_location_expr_complaint ();
16927 case DW_OP_GNU_push_tls_address
:
16928 /* The top of the stack has the offset from the beginning
16929 of the thread control block at which the variable is located. */
16930 /* Nothing should follow this operator, so the top of stack would
16932 /* This is valid for partial global symbols, but the variable's
16933 address will be bogus in the psymtab. Make it always at least
16934 non-zero to not look as a variable garbage collected by linker
16935 which have DW_OP_addr 0. */
16937 dwarf2_complex_location_expr_complaint ();
16941 case DW_OP_GNU_uninit
:
16944 case DW_OP_GNU_addr_index
:
16945 case DW_OP_GNU_const_index
:
16946 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
16953 const char *name
= get_DW_OP_name (op
);
16956 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
16959 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
16963 return (stack
[stacki
]);
16966 /* Enforce maximum stack depth of SIZE-1 to avoid writing
16967 outside of the allocated space. Also enforce minimum>0. */
16968 if (stacki
>= ARRAY_SIZE (stack
) - 1)
16970 complaint (&symfile_complaints
,
16971 _("location description stack overflow"));
16977 complaint (&symfile_complaints
,
16978 _("location description stack underflow"));
16982 return (stack
[stacki
]);
16985 /* memory allocation interface */
16987 static struct dwarf_block
*
16988 dwarf_alloc_block (struct dwarf2_cu
*cu
)
16990 struct dwarf_block
*blk
;
16992 blk
= (struct dwarf_block
*)
16993 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
16997 static struct die_info
*
16998 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
17000 struct die_info
*die
;
17001 size_t size
= sizeof (struct die_info
);
17004 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
17006 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
17007 memset (die
, 0, sizeof (struct die_info
));
17012 /* Macro support. */
17014 /* Return the full name of file number I in *LH's file name table.
17015 Use COMP_DIR as the name of the current directory of the
17016 compilation. The result is allocated using xmalloc; the caller is
17017 responsible for freeing it. */
17019 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
17021 /* Is the file number a valid index into the line header's file name
17022 table? Remember that file numbers start with one, not zero. */
17023 if (1 <= file
&& file
<= lh
->num_file_names
)
17025 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17027 if (IS_ABSOLUTE_PATH (fe
->name
))
17028 return xstrdup (fe
->name
);
17036 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17042 dir_len
= strlen (dir
);
17043 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
17044 strcpy (full_name
, dir
);
17045 full_name
[dir_len
] = '/';
17046 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
17050 return xstrdup (fe
->name
);
17055 /* The compiler produced a bogus file number. We can at least
17056 record the macro definitions made in the file, even if we
17057 won't be able to find the file by name. */
17058 char fake_name
[80];
17060 sprintf (fake_name
, "<bad macro file number %d>", file
);
17062 complaint (&symfile_complaints
,
17063 _("bad file number in macro information (%d)"),
17066 return xstrdup (fake_name
);
17071 static struct macro_source_file
*
17072 macro_start_file (int file
, int line
,
17073 struct macro_source_file
*current_file
,
17074 const char *comp_dir
,
17075 struct line_header
*lh
, struct objfile
*objfile
)
17077 /* The full name of this source file. */
17078 char *full_name
= file_full_name (file
, lh
, comp_dir
);
17080 /* We don't create a macro table for this compilation unit
17081 at all until we actually get a filename. */
17082 if (! pending_macros
)
17083 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
17084 objfile
->macro_cache
);
17086 if (! current_file
)
17088 /* If we have no current file, then this must be the start_file
17089 directive for the compilation unit's main source file. */
17090 current_file
= macro_set_main (pending_macros
, full_name
);
17091 macro_define_special (pending_macros
);
17094 current_file
= macro_include (current_file
, line
, full_name
);
17098 return current_file
;
17102 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
17103 followed by a null byte. */
17105 copy_string (const char *buf
, int len
)
17107 char *s
= xmalloc (len
+ 1);
17109 memcpy (s
, buf
, len
);
17115 static const char *
17116 consume_improper_spaces (const char *p
, const char *body
)
17120 complaint (&symfile_complaints
,
17121 _("macro definition contains spaces "
17122 "in formal argument list:\n`%s'"),
17134 parse_macro_definition (struct macro_source_file
*file
, int line
,
17139 /* The body string takes one of two forms. For object-like macro
17140 definitions, it should be:
17142 <macro name> " " <definition>
17144 For function-like macro definitions, it should be:
17146 <macro name> "() " <definition>
17148 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
17150 Spaces may appear only where explicitly indicated, and in the
17153 The Dwarf 2 spec says that an object-like macro's name is always
17154 followed by a space, but versions of GCC around March 2002 omit
17155 the space when the macro's definition is the empty string.
17157 The Dwarf 2 spec says that there should be no spaces between the
17158 formal arguments in a function-like macro's formal argument list,
17159 but versions of GCC around March 2002 include spaces after the
17163 /* Find the extent of the macro name. The macro name is terminated
17164 by either a space or null character (for an object-like macro) or
17165 an opening paren (for a function-like macro). */
17166 for (p
= body
; *p
; p
++)
17167 if (*p
== ' ' || *p
== '(')
17170 if (*p
== ' ' || *p
== '\0')
17172 /* It's an object-like macro. */
17173 int name_len
= p
- body
;
17174 char *name
= copy_string (body
, name_len
);
17175 const char *replacement
;
17178 replacement
= body
+ name_len
+ 1;
17181 dwarf2_macro_malformed_definition_complaint (body
);
17182 replacement
= body
+ name_len
;
17185 macro_define_object (file
, line
, name
, replacement
);
17189 else if (*p
== '(')
17191 /* It's a function-like macro. */
17192 char *name
= copy_string (body
, p
- body
);
17195 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
17199 p
= consume_improper_spaces (p
, body
);
17201 /* Parse the formal argument list. */
17202 while (*p
&& *p
!= ')')
17204 /* Find the extent of the current argument name. */
17205 const char *arg_start
= p
;
17207 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
17210 if (! *p
|| p
== arg_start
)
17211 dwarf2_macro_malformed_definition_complaint (body
);
17214 /* Make sure argv has room for the new argument. */
17215 if (argc
>= argv_size
)
17218 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
17221 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
17224 p
= consume_improper_spaces (p
, body
);
17226 /* Consume the comma, if present. */
17231 p
= consume_improper_spaces (p
, body
);
17240 /* Perfectly formed definition, no complaints. */
17241 macro_define_function (file
, line
, name
,
17242 argc
, (const char **) argv
,
17244 else if (*p
== '\0')
17246 /* Complain, but do define it. */
17247 dwarf2_macro_malformed_definition_complaint (body
);
17248 macro_define_function (file
, line
, name
,
17249 argc
, (const char **) argv
,
17253 /* Just complain. */
17254 dwarf2_macro_malformed_definition_complaint (body
);
17257 /* Just complain. */
17258 dwarf2_macro_malformed_definition_complaint (body
);
17264 for (i
= 0; i
< argc
; i
++)
17270 dwarf2_macro_malformed_definition_complaint (body
);
17273 /* Skip some bytes from BYTES according to the form given in FORM.
17274 Returns the new pointer. */
17277 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
17278 enum dwarf_form form
,
17279 unsigned int offset_size
,
17280 struct dwarf2_section_info
*section
)
17282 unsigned int bytes_read
;
17286 case DW_FORM_data1
:
17291 case DW_FORM_data2
:
17295 case DW_FORM_data4
:
17299 case DW_FORM_data8
:
17303 case DW_FORM_string
:
17304 read_direct_string (abfd
, bytes
, &bytes_read
);
17305 bytes
+= bytes_read
;
17308 case DW_FORM_sec_offset
:
17310 case DW_FORM_GNU_strp_alt
:
17311 bytes
+= offset_size
;
17314 case DW_FORM_block
:
17315 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
17316 bytes
+= bytes_read
;
17319 case DW_FORM_block1
:
17320 bytes
+= 1 + read_1_byte (abfd
, bytes
);
17322 case DW_FORM_block2
:
17323 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
17325 case DW_FORM_block4
:
17326 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
17329 case DW_FORM_sdata
:
17330 case DW_FORM_udata
:
17331 case DW_FORM_GNU_addr_index
:
17332 case DW_FORM_GNU_str_index
:
17333 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
17336 dwarf2_section_buffer_overflow_complaint (section
);
17344 complaint (&symfile_complaints
,
17345 _("invalid form 0x%x in `%s'"),
17347 section
->asection
->name
);
17355 /* A helper for dwarf_decode_macros that handles skipping an unknown
17356 opcode. Returns an updated pointer to the macro data buffer; or,
17357 on error, issues a complaint and returns NULL. */
17360 skip_unknown_opcode (unsigned int opcode
,
17361 gdb_byte
**opcode_definitions
,
17362 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
17364 unsigned int offset_size
,
17365 struct dwarf2_section_info
*section
)
17367 unsigned int bytes_read
, i
;
17371 if (opcode_definitions
[opcode
] == NULL
)
17373 complaint (&symfile_complaints
,
17374 _("unrecognized DW_MACFINO opcode 0x%x"),
17379 defn
= opcode_definitions
[opcode
];
17380 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
17381 defn
+= bytes_read
;
17383 for (i
= 0; i
< arg
; ++i
)
17385 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
17387 if (mac_ptr
== NULL
)
17389 /* skip_form_bytes already issued the complaint. */
17397 /* A helper function which parses the header of a macro section.
17398 If the macro section is the extended (for now called "GNU") type,
17399 then this updates *OFFSET_SIZE. Returns a pointer to just after
17400 the header, or issues a complaint and returns NULL on error. */
17403 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
17406 unsigned int *offset_size
,
17407 int section_is_gnu
)
17409 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
17411 if (section_is_gnu
)
17413 unsigned int version
, flags
;
17415 version
= read_2_bytes (abfd
, mac_ptr
);
17418 complaint (&symfile_complaints
,
17419 _("unrecognized version `%d' in .debug_macro section"),
17425 flags
= read_1_byte (abfd
, mac_ptr
);
17427 *offset_size
= (flags
& 1) ? 8 : 4;
17429 if ((flags
& 2) != 0)
17430 /* We don't need the line table offset. */
17431 mac_ptr
+= *offset_size
;
17433 /* Vendor opcode descriptions. */
17434 if ((flags
& 4) != 0)
17436 unsigned int i
, count
;
17438 count
= read_1_byte (abfd
, mac_ptr
);
17440 for (i
= 0; i
< count
; ++i
)
17442 unsigned int opcode
, bytes_read
;
17445 opcode
= read_1_byte (abfd
, mac_ptr
);
17447 opcode_definitions
[opcode
] = mac_ptr
;
17448 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17449 mac_ptr
+= bytes_read
;
17458 /* A helper for dwarf_decode_macros that handles the GNU extensions,
17459 including DW_MACRO_GNU_transparent_include. */
17462 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
17463 struct macro_source_file
*current_file
,
17464 struct line_header
*lh
, char *comp_dir
,
17465 struct dwarf2_section_info
*section
,
17466 int section_is_gnu
, int section_is_dwz
,
17467 unsigned int offset_size
,
17468 struct objfile
*objfile
,
17469 htab_t include_hash
)
17471 enum dwarf_macro_record_type macinfo_type
;
17472 int at_commandline
;
17473 gdb_byte
*opcode_definitions
[256];
17475 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
17476 &offset_size
, section_is_gnu
);
17477 if (mac_ptr
== NULL
)
17479 /* We already issued a complaint. */
17483 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
17484 GDB is still reading the definitions from command line. First
17485 DW_MACINFO_start_file will need to be ignored as it was already executed
17486 to create CURRENT_FILE for the main source holding also the command line
17487 definitions. On first met DW_MACINFO_start_file this flag is reset to
17488 normally execute all the remaining DW_MACINFO_start_file macinfos. */
17490 at_commandline
= 1;
17494 /* Do we at least have room for a macinfo type byte? */
17495 if (mac_ptr
>= mac_end
)
17497 dwarf2_section_buffer_overflow_complaint (section
);
17501 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
17504 /* Note that we rely on the fact that the corresponding GNU and
17505 DWARF constants are the same. */
17506 switch (macinfo_type
)
17508 /* A zero macinfo type indicates the end of the macro
17513 case DW_MACRO_GNU_define
:
17514 case DW_MACRO_GNU_undef
:
17515 case DW_MACRO_GNU_define_indirect
:
17516 case DW_MACRO_GNU_undef_indirect
:
17517 case DW_MACRO_GNU_define_indirect_alt
:
17518 case DW_MACRO_GNU_undef_indirect_alt
:
17520 unsigned int bytes_read
;
17525 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17526 mac_ptr
+= bytes_read
;
17528 if (macinfo_type
== DW_MACRO_GNU_define
17529 || macinfo_type
== DW_MACRO_GNU_undef
)
17531 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17532 mac_ptr
+= bytes_read
;
17536 LONGEST str_offset
;
17538 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
17539 mac_ptr
+= offset_size
;
17541 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
17542 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
17545 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17547 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
17550 body
= read_indirect_string_at_offset (abfd
, str_offset
);
17553 is_define
= (macinfo_type
== DW_MACRO_GNU_define
17554 || macinfo_type
== DW_MACRO_GNU_define_indirect
17555 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
17556 if (! current_file
)
17558 /* DWARF violation as no main source is present. */
17559 complaint (&symfile_complaints
,
17560 _("debug info with no main source gives macro %s "
17562 is_define
? _("definition") : _("undefinition"),
17566 if ((line
== 0 && !at_commandline
)
17567 || (line
!= 0 && at_commandline
))
17568 complaint (&symfile_complaints
,
17569 _("debug info gives %s macro %s with %s line %d: %s"),
17570 at_commandline
? _("command-line") : _("in-file"),
17571 is_define
? _("definition") : _("undefinition"),
17572 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
17575 parse_macro_definition (current_file
, line
, body
);
17578 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
17579 || macinfo_type
== DW_MACRO_GNU_undef_indirect
17580 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
17581 macro_undef (current_file
, line
, body
);
17586 case DW_MACRO_GNU_start_file
:
17588 unsigned int bytes_read
;
17591 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17592 mac_ptr
+= bytes_read
;
17593 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17594 mac_ptr
+= bytes_read
;
17596 if ((line
== 0 && !at_commandline
)
17597 || (line
!= 0 && at_commandline
))
17598 complaint (&symfile_complaints
,
17599 _("debug info gives source %d included "
17600 "from %s at %s line %d"),
17601 file
, at_commandline
? _("command-line") : _("file"),
17602 line
== 0 ? _("zero") : _("non-zero"), line
);
17604 if (at_commandline
)
17606 /* This DW_MACRO_GNU_start_file was executed in the
17608 at_commandline
= 0;
17611 current_file
= macro_start_file (file
, line
,
17612 current_file
, comp_dir
,
17617 case DW_MACRO_GNU_end_file
:
17618 if (! current_file
)
17619 complaint (&symfile_complaints
,
17620 _("macro debug info has an unmatched "
17621 "`close_file' directive"));
17624 current_file
= current_file
->included_by
;
17625 if (! current_file
)
17627 enum dwarf_macro_record_type next_type
;
17629 /* GCC circa March 2002 doesn't produce the zero
17630 type byte marking the end of the compilation
17631 unit. Complain if it's not there, but exit no
17634 /* Do we at least have room for a macinfo type byte? */
17635 if (mac_ptr
>= mac_end
)
17637 dwarf2_section_buffer_overflow_complaint (section
);
17641 /* We don't increment mac_ptr here, so this is just
17643 next_type
= read_1_byte (abfd
, mac_ptr
);
17644 if (next_type
!= 0)
17645 complaint (&symfile_complaints
,
17646 _("no terminating 0-type entry for "
17647 "macros in `.debug_macinfo' section"));
17654 case DW_MACRO_GNU_transparent_include
:
17655 case DW_MACRO_GNU_transparent_include_alt
:
17660 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
17661 mac_ptr
+= offset_size
;
17663 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
17666 /* This has actually happened; see
17667 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
17668 complaint (&symfile_complaints
,
17669 _("recursive DW_MACRO_GNU_transparent_include in "
17670 ".debug_macro section"));
17674 bfd
*include_bfd
= abfd
;
17675 struct dwarf2_section_info
*include_section
= section
;
17676 struct dwarf2_section_info alt_section
;
17677 gdb_byte
*include_mac_end
= mac_end
;
17678 int is_dwz
= section_is_dwz
;
17682 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
17684 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17686 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
17689 include_bfd
= dwz
->macro
.asection
->owner
;
17690 include_section
= &dwz
->macro
;
17691 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
17695 dwarf_decode_macro_bytes (include_bfd
,
17696 include_section
->buffer
+ offset
,
17697 include_mac_end
, current_file
,
17699 section
, section_is_gnu
, is_dwz
,
17700 offset_size
, objfile
, include_hash
);
17702 htab_remove_elt (include_hash
, mac_ptr
);
17707 case DW_MACINFO_vendor_ext
:
17708 if (!section_is_gnu
)
17710 unsigned int bytes_read
;
17713 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17714 mac_ptr
+= bytes_read
;
17715 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17716 mac_ptr
+= bytes_read
;
17718 /* We don't recognize any vendor extensions. */
17724 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
17725 mac_ptr
, mac_end
, abfd
, offset_size
,
17727 if (mac_ptr
== NULL
)
17731 } while (macinfo_type
!= 0);
17735 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
17736 char *comp_dir
, int section_is_gnu
)
17738 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17739 struct line_header
*lh
= cu
->line_header
;
17741 gdb_byte
*mac_ptr
, *mac_end
;
17742 struct macro_source_file
*current_file
= 0;
17743 enum dwarf_macro_record_type macinfo_type
;
17744 unsigned int offset_size
= cu
->header
.offset_size
;
17745 gdb_byte
*opcode_definitions
[256];
17746 struct cleanup
*cleanup
;
17747 htab_t include_hash
;
17749 struct dwarf2_section_info
*section
;
17750 const char *section_name
;
17752 if (cu
->dwo_unit
!= NULL
)
17754 if (section_is_gnu
)
17756 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
17757 section_name
= ".debug_macro.dwo";
17761 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
17762 section_name
= ".debug_macinfo.dwo";
17767 if (section_is_gnu
)
17769 section
= &dwarf2_per_objfile
->macro
;
17770 section_name
= ".debug_macro";
17774 section
= &dwarf2_per_objfile
->macinfo
;
17775 section_name
= ".debug_macinfo";
17779 dwarf2_read_section (objfile
, section
);
17780 if (section
->buffer
== NULL
)
17782 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
17785 abfd
= section
->asection
->owner
;
17787 /* First pass: Find the name of the base filename.
17788 This filename is needed in order to process all macros whose definition
17789 (or undefinition) comes from the command line. These macros are defined
17790 before the first DW_MACINFO_start_file entry, and yet still need to be
17791 associated to the base file.
17793 To determine the base file name, we scan the macro definitions until we
17794 reach the first DW_MACINFO_start_file entry. We then initialize
17795 CURRENT_FILE accordingly so that any macro definition found before the
17796 first DW_MACINFO_start_file can still be associated to the base file. */
17798 mac_ptr
= section
->buffer
+ offset
;
17799 mac_end
= section
->buffer
+ section
->size
;
17801 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
17802 &offset_size
, section_is_gnu
);
17803 if (mac_ptr
== NULL
)
17805 /* We already issued a complaint. */
17811 /* Do we at least have room for a macinfo type byte? */
17812 if (mac_ptr
>= mac_end
)
17814 /* Complaint is printed during the second pass as GDB will probably
17815 stop the first pass earlier upon finding
17816 DW_MACINFO_start_file. */
17820 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
17823 /* Note that we rely on the fact that the corresponding GNU and
17824 DWARF constants are the same. */
17825 switch (macinfo_type
)
17827 /* A zero macinfo type indicates the end of the macro
17832 case DW_MACRO_GNU_define
:
17833 case DW_MACRO_GNU_undef
:
17834 /* Only skip the data by MAC_PTR. */
17836 unsigned int bytes_read
;
17838 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17839 mac_ptr
+= bytes_read
;
17840 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17841 mac_ptr
+= bytes_read
;
17845 case DW_MACRO_GNU_start_file
:
17847 unsigned int bytes_read
;
17850 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17851 mac_ptr
+= bytes_read
;
17852 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17853 mac_ptr
+= bytes_read
;
17855 current_file
= macro_start_file (file
, line
, current_file
,
17856 comp_dir
, lh
, objfile
);
17860 case DW_MACRO_GNU_end_file
:
17861 /* No data to skip by MAC_PTR. */
17864 case DW_MACRO_GNU_define_indirect
:
17865 case DW_MACRO_GNU_undef_indirect
:
17866 case DW_MACRO_GNU_define_indirect_alt
:
17867 case DW_MACRO_GNU_undef_indirect_alt
:
17869 unsigned int bytes_read
;
17871 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17872 mac_ptr
+= bytes_read
;
17873 mac_ptr
+= offset_size
;
17877 case DW_MACRO_GNU_transparent_include
:
17878 case DW_MACRO_GNU_transparent_include_alt
:
17879 /* Note that, according to the spec, a transparent include
17880 chain cannot call DW_MACRO_GNU_start_file. So, we can just
17881 skip this opcode. */
17882 mac_ptr
+= offset_size
;
17885 case DW_MACINFO_vendor_ext
:
17886 /* Only skip the data by MAC_PTR. */
17887 if (!section_is_gnu
)
17889 unsigned int bytes_read
;
17891 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17892 mac_ptr
+= bytes_read
;
17893 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17894 mac_ptr
+= bytes_read
;
17899 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
17900 mac_ptr
, mac_end
, abfd
, offset_size
,
17902 if (mac_ptr
== NULL
)
17906 } while (macinfo_type
!= 0 && current_file
== NULL
);
17908 /* Second pass: Process all entries.
17910 Use the AT_COMMAND_LINE flag to determine whether we are still processing
17911 command-line macro definitions/undefinitions. This flag is unset when we
17912 reach the first DW_MACINFO_start_file entry. */
17914 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
17915 NULL
, xcalloc
, xfree
);
17916 cleanup
= make_cleanup_htab_delete (include_hash
);
17917 mac_ptr
= section
->buffer
+ offset
;
17918 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
17920 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
17921 current_file
, lh
, comp_dir
, section
,
17923 offset_size
, objfile
, include_hash
);
17924 do_cleanups (cleanup
);
17927 /* Check if the attribute's form is a DW_FORM_block*
17928 if so return true else false. */
17931 attr_form_is_block (struct attribute
*attr
)
17933 return (attr
== NULL
? 0 :
17934 attr
->form
== DW_FORM_block1
17935 || attr
->form
== DW_FORM_block2
17936 || attr
->form
== DW_FORM_block4
17937 || attr
->form
== DW_FORM_block
17938 || attr
->form
== DW_FORM_exprloc
);
17941 /* Return non-zero if ATTR's value is a section offset --- classes
17942 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
17943 You may use DW_UNSND (attr) to retrieve such offsets.
17945 Section 7.5.4, "Attribute Encodings", explains that no attribute
17946 may have a value that belongs to more than one of these classes; it
17947 would be ambiguous if we did, because we use the same forms for all
17951 attr_form_is_section_offset (struct attribute
*attr
)
17953 return (attr
->form
== DW_FORM_data4
17954 || attr
->form
== DW_FORM_data8
17955 || attr
->form
== DW_FORM_sec_offset
);
17958 /* Return non-zero if ATTR's value falls in the 'constant' class, or
17959 zero otherwise. When this function returns true, you can apply
17960 dwarf2_get_attr_constant_value to it.
17962 However, note that for some attributes you must check
17963 attr_form_is_section_offset before using this test. DW_FORM_data4
17964 and DW_FORM_data8 are members of both the constant class, and of
17965 the classes that contain offsets into other debug sections
17966 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
17967 that, if an attribute's can be either a constant or one of the
17968 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
17969 taken as section offsets, not constants. */
17972 attr_form_is_constant (struct attribute
*attr
)
17974 switch (attr
->form
)
17976 case DW_FORM_sdata
:
17977 case DW_FORM_udata
:
17978 case DW_FORM_data1
:
17979 case DW_FORM_data2
:
17980 case DW_FORM_data4
:
17981 case DW_FORM_data8
:
17988 /* Return the .debug_loc section to use for CU.
17989 For DWO files use .debug_loc.dwo. */
17991 static struct dwarf2_section_info
*
17992 cu_debug_loc_section (struct dwarf2_cu
*cu
)
17995 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
17996 return &dwarf2_per_objfile
->loc
;
17999 /* A helper function that fills in a dwarf2_loclist_baton. */
18002 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
18003 struct dwarf2_loclist_baton
*baton
,
18004 struct attribute
*attr
)
18006 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18008 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18010 baton
->per_cu
= cu
->per_cu
;
18011 gdb_assert (baton
->per_cu
);
18012 /* We don't know how long the location list is, but make sure we
18013 don't run off the edge of the section. */
18014 baton
->size
= section
->size
- DW_UNSND (attr
);
18015 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
18016 baton
->base_address
= cu
->base_address
;
18017 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
18021 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
18022 struct dwarf2_cu
*cu
)
18024 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18025 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18027 if (attr_form_is_section_offset (attr
)
18028 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
18029 the section. If so, fall through to the complaint in the
18031 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
18033 struct dwarf2_loclist_baton
*baton
;
18035 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18036 sizeof (struct dwarf2_loclist_baton
));
18038 fill_in_loclist_baton (cu
, baton
, attr
);
18040 if (cu
->base_known
== 0)
18041 complaint (&symfile_complaints
,
18042 _("Location list used without "
18043 "specifying the CU base address."));
18045 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
18046 SYMBOL_LOCATION_BATON (sym
) = baton
;
18050 struct dwarf2_locexpr_baton
*baton
;
18052 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18053 sizeof (struct dwarf2_locexpr_baton
));
18054 baton
->per_cu
= cu
->per_cu
;
18055 gdb_assert (baton
->per_cu
);
18057 if (attr_form_is_block (attr
))
18059 /* Note that we're just copying the block's data pointer
18060 here, not the actual data. We're still pointing into the
18061 info_buffer for SYM's objfile; right now we never release
18062 that buffer, but when we do clean up properly this may
18064 baton
->size
= DW_BLOCK (attr
)->size
;
18065 baton
->data
= DW_BLOCK (attr
)->data
;
18069 dwarf2_invalid_attrib_class_complaint ("location description",
18070 SYMBOL_NATURAL_NAME (sym
));
18074 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
18075 SYMBOL_LOCATION_BATON (sym
) = baton
;
18079 /* Return the OBJFILE associated with the compilation unit CU. If CU
18080 came from a separate debuginfo file, then the master objfile is
18084 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
18086 struct objfile
*objfile
= per_cu
->objfile
;
18088 /* Return the master objfile, so that we can report and look up the
18089 correct file containing this variable. */
18090 if (objfile
->separate_debug_objfile_backlink
)
18091 objfile
= objfile
->separate_debug_objfile_backlink
;
18096 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
18097 (CU_HEADERP is unused in such case) or prepare a temporary copy at
18098 CU_HEADERP first. */
18100 static const struct comp_unit_head
*
18101 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
18102 struct dwarf2_per_cu_data
*per_cu
)
18104 gdb_byte
*info_ptr
;
18107 return &per_cu
->cu
->header
;
18109 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
18111 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
18112 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
18117 /* Return the address size given in the compilation unit header for CU. */
18120 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
18122 struct comp_unit_head cu_header_local
;
18123 const struct comp_unit_head
*cu_headerp
;
18125 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
18127 return cu_headerp
->addr_size
;
18130 /* Return the offset size given in the compilation unit header for CU. */
18133 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
18135 struct comp_unit_head cu_header_local
;
18136 const struct comp_unit_head
*cu_headerp
;
18138 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
18140 return cu_headerp
->offset_size
;
18143 /* See its dwarf2loc.h declaration. */
18146 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
18148 struct comp_unit_head cu_header_local
;
18149 const struct comp_unit_head
*cu_headerp
;
18151 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
18153 if (cu_headerp
->version
== 2)
18154 return cu_headerp
->addr_size
;
18156 return cu_headerp
->offset_size
;
18159 /* Return the text offset of the CU. The returned offset comes from
18160 this CU's objfile. If this objfile came from a separate debuginfo
18161 file, then the offset may be different from the corresponding
18162 offset in the parent objfile. */
18165 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
18167 struct objfile
*objfile
= per_cu
->objfile
;
18169 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18172 /* Locate the .debug_info compilation unit from CU's objfile which contains
18173 the DIE at OFFSET. Raises an error on failure. */
18175 static struct dwarf2_per_cu_data
*
18176 dwarf2_find_containing_comp_unit (sect_offset offset
,
18177 unsigned int offset_in_dwz
,
18178 struct objfile
*objfile
)
18180 struct dwarf2_per_cu_data
*this_cu
;
18182 const sect_offset
*cu_off
;
18185 high
= dwarf2_per_objfile
->n_comp_units
- 1;
18188 struct dwarf2_per_cu_data
*mid_cu
;
18189 int mid
= low
+ (high
- low
) / 2;
18191 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
18192 cu_off
= &mid_cu
->offset
;
18193 if (mid_cu
->is_dwz
> offset_in_dwz
18194 || (mid_cu
->is_dwz
== offset_in_dwz
18195 && cu_off
->sect_off
>= offset
.sect_off
))
18200 gdb_assert (low
== high
);
18201 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
18202 cu_off
= &this_cu
->offset
;
18203 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
18205 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
18206 error (_("Dwarf Error: could not find partial DIE containing "
18207 "offset 0x%lx [in module %s]"),
18208 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
18210 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
18211 <= offset
.sect_off
);
18212 return dwarf2_per_objfile
->all_comp_units
[low
-1];
18216 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
18217 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
18218 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
18219 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
18220 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
18225 /* Initialize dwarf2_cu CU, owned by PER_CU. */
18228 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
18230 memset (cu
, 0, sizeof (*cu
));
18232 cu
->per_cu
= per_cu
;
18233 cu
->objfile
= per_cu
->objfile
;
18234 obstack_init (&cu
->comp_unit_obstack
);
18237 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
18240 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
18241 enum language pretend_language
)
18243 struct attribute
*attr
;
18245 /* Set the language we're debugging. */
18246 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
18248 set_cu_language (DW_UNSND (attr
), cu
);
18251 cu
->language
= pretend_language
;
18252 cu
->language_defn
= language_def (cu
->language
);
18255 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
18257 cu
->producer
= DW_STRING (attr
);
18260 /* Release one cached compilation unit, CU. We unlink it from the tree
18261 of compilation units, but we don't remove it from the read_in_chain;
18262 the caller is responsible for that.
18263 NOTE: DATA is a void * because this function is also used as a
18264 cleanup routine. */
18267 free_heap_comp_unit (void *data
)
18269 struct dwarf2_cu
*cu
= data
;
18271 gdb_assert (cu
->per_cu
!= NULL
);
18272 cu
->per_cu
->cu
= NULL
;
18275 obstack_free (&cu
->comp_unit_obstack
, NULL
);
18280 /* This cleanup function is passed the address of a dwarf2_cu on the stack
18281 when we're finished with it. We can't free the pointer itself, but be
18282 sure to unlink it from the cache. Also release any associated storage. */
18285 free_stack_comp_unit (void *data
)
18287 struct dwarf2_cu
*cu
= data
;
18289 gdb_assert (cu
->per_cu
!= NULL
);
18290 cu
->per_cu
->cu
= NULL
;
18293 obstack_free (&cu
->comp_unit_obstack
, NULL
);
18294 cu
->partial_dies
= NULL
;
18297 /* Free all cached compilation units. */
18300 free_cached_comp_units (void *data
)
18302 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
18304 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18305 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
18306 while (per_cu
!= NULL
)
18308 struct dwarf2_per_cu_data
*next_cu
;
18310 next_cu
= per_cu
->cu
->read_in_chain
;
18312 free_heap_comp_unit (per_cu
->cu
);
18313 *last_chain
= next_cu
;
18319 /* Increase the age counter on each cached compilation unit, and free
18320 any that are too old. */
18323 age_cached_comp_units (void)
18325 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
18327 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
18328 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18329 while (per_cu
!= NULL
)
18331 per_cu
->cu
->last_used
++;
18332 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
18333 dwarf2_mark (per_cu
->cu
);
18334 per_cu
= per_cu
->cu
->read_in_chain
;
18337 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18338 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
18339 while (per_cu
!= NULL
)
18341 struct dwarf2_per_cu_data
*next_cu
;
18343 next_cu
= per_cu
->cu
->read_in_chain
;
18345 if (!per_cu
->cu
->mark
)
18347 free_heap_comp_unit (per_cu
->cu
);
18348 *last_chain
= next_cu
;
18351 last_chain
= &per_cu
->cu
->read_in_chain
;
18357 /* Remove a single compilation unit from the cache. */
18360 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
18362 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
18364 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18365 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
18366 while (per_cu
!= NULL
)
18368 struct dwarf2_per_cu_data
*next_cu
;
18370 next_cu
= per_cu
->cu
->read_in_chain
;
18372 if (per_cu
== target_per_cu
)
18374 free_heap_comp_unit (per_cu
->cu
);
18376 *last_chain
= next_cu
;
18380 last_chain
= &per_cu
->cu
->read_in_chain
;
18386 /* Release all extra memory associated with OBJFILE. */
18389 dwarf2_free_objfile (struct objfile
*objfile
)
18391 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
18393 if (dwarf2_per_objfile
== NULL
)
18396 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
18397 free_cached_comp_units (NULL
);
18399 if (dwarf2_per_objfile
->quick_file_names_table
)
18400 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
18402 /* Everything else should be on the objfile obstack. */
18405 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
18406 We store these in a hash table separate from the DIEs, and preserve them
18407 when the DIEs are flushed out of cache.
18409 The CU "per_cu" pointer is needed because offset alone is not enough to
18410 uniquely identify the type. A file may have multiple .debug_types sections,
18411 or the type may come from a DWO file. We have to use something in
18412 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
18413 routine, get_die_type_at_offset, from outside this file, and thus won't
18414 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
18417 struct dwarf2_per_cu_offset_and_type
18419 const struct dwarf2_per_cu_data
*per_cu
;
18420 sect_offset offset
;
18424 /* Hash function for a dwarf2_per_cu_offset_and_type. */
18427 per_cu_offset_and_type_hash (const void *item
)
18429 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
18431 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
18434 /* Equality function for a dwarf2_per_cu_offset_and_type. */
18437 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
18439 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
18440 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
18442 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
18443 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
18446 /* Set the type associated with DIE to TYPE. Save it in CU's hash
18447 table if necessary. For convenience, return TYPE.
18449 The DIEs reading must have careful ordering to:
18450 * Not cause infite loops trying to read in DIEs as a prerequisite for
18451 reading current DIE.
18452 * Not trying to dereference contents of still incompletely read in types
18453 while reading in other DIEs.
18454 * Enable referencing still incompletely read in types just by a pointer to
18455 the type without accessing its fields.
18457 Therefore caller should follow these rules:
18458 * Try to fetch any prerequisite types we may need to build this DIE type
18459 before building the type and calling set_die_type.
18460 * After building type call set_die_type for current DIE as soon as
18461 possible before fetching more types to complete the current type.
18462 * Make the type as complete as possible before fetching more types. */
18464 static struct type
*
18465 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18467 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
18468 struct objfile
*objfile
= cu
->objfile
;
18470 /* For Ada types, make sure that the gnat-specific data is always
18471 initialized (if not already set). There are a few types where
18472 we should not be doing so, because the type-specific area is
18473 already used to hold some other piece of info (eg: TYPE_CODE_FLT
18474 where the type-specific area is used to store the floatformat).
18475 But this is not a problem, because the gnat-specific information
18476 is actually not needed for these types. */
18477 if (need_gnat_info (cu
)
18478 && TYPE_CODE (type
) != TYPE_CODE_FUNC
18479 && TYPE_CODE (type
) != TYPE_CODE_FLT
18480 && !HAVE_GNAT_AUX_INFO (type
))
18481 INIT_GNAT_SPECIFIC (type
);
18483 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
18485 dwarf2_per_objfile
->die_type_hash
=
18486 htab_create_alloc_ex (127,
18487 per_cu_offset_and_type_hash
,
18488 per_cu_offset_and_type_eq
,
18490 &objfile
->objfile_obstack
,
18491 hashtab_obstack_allocate
,
18492 dummy_obstack_deallocate
);
18495 ofs
.per_cu
= cu
->per_cu
;
18496 ofs
.offset
= die
->offset
;
18498 slot
= (struct dwarf2_per_cu_offset_and_type
**)
18499 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
18501 complaint (&symfile_complaints
,
18502 _("A problem internal to GDB: DIE 0x%x has type already set"),
18503 die
->offset
.sect_off
);
18504 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
18509 /* Look up the type for the die at OFFSET in the appropriate type_hash
18510 table, or return NULL if the die does not have a saved type. */
18512 static struct type
*
18513 get_die_type_at_offset (sect_offset offset
,
18514 struct dwarf2_per_cu_data
*per_cu
)
18516 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
18518 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
18521 ofs
.per_cu
= per_cu
;
18522 ofs
.offset
= offset
;
18523 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
18530 /* Look up the type for DIE in the appropriate type_hash table,
18531 or return NULL if DIE does not have a saved type. */
18533 static struct type
*
18534 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18536 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
18539 /* Add a dependence relationship from CU to REF_PER_CU. */
18542 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
18543 struct dwarf2_per_cu_data
*ref_per_cu
)
18547 if (cu
->dependencies
== NULL
)
18549 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
18550 NULL
, &cu
->comp_unit_obstack
,
18551 hashtab_obstack_allocate
,
18552 dummy_obstack_deallocate
);
18554 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
18556 *slot
= ref_per_cu
;
18559 /* Subroutine of dwarf2_mark to pass to htab_traverse.
18560 Set the mark field in every compilation unit in the
18561 cache that we must keep because we are keeping CU. */
18564 dwarf2_mark_helper (void **slot
, void *data
)
18566 struct dwarf2_per_cu_data
*per_cu
;
18568 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
18570 /* cu->dependencies references may not yet have been ever read if QUIT aborts
18571 reading of the chain. As such dependencies remain valid it is not much
18572 useful to track and undo them during QUIT cleanups. */
18573 if (per_cu
->cu
== NULL
)
18576 if (per_cu
->cu
->mark
)
18578 per_cu
->cu
->mark
= 1;
18580 if (per_cu
->cu
->dependencies
!= NULL
)
18581 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
18586 /* Set the mark field in CU and in every other compilation unit in the
18587 cache that we must keep because we are keeping CU. */
18590 dwarf2_mark (struct dwarf2_cu
*cu
)
18595 if (cu
->dependencies
!= NULL
)
18596 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
18600 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
18604 per_cu
->cu
->mark
= 0;
18605 per_cu
= per_cu
->cu
->read_in_chain
;
18609 /* Trivial hash function for partial_die_info: the hash value of a DIE
18610 is its offset in .debug_info for this objfile. */
18613 partial_die_hash (const void *item
)
18615 const struct partial_die_info
*part_die
= item
;
18617 return part_die
->offset
.sect_off
;
18620 /* Trivial comparison function for partial_die_info structures: two DIEs
18621 are equal if they have the same offset. */
18624 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
18626 const struct partial_die_info
*part_die_lhs
= item_lhs
;
18627 const struct partial_die_info
*part_die_rhs
= item_rhs
;
18629 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
18632 static struct cmd_list_element
*set_dwarf2_cmdlist
;
18633 static struct cmd_list_element
*show_dwarf2_cmdlist
;
18636 set_dwarf2_cmd (char *args
, int from_tty
)
18638 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
18642 show_dwarf2_cmd (char *args
, int from_tty
)
18644 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
18647 /* Free data associated with OBJFILE, if necessary. */
18650 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
18652 struct dwarf2_per_objfile
*data
= d
;
18655 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
18656 VEC_free (dwarf2_per_cu_ptr
,
18657 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
18659 VEC_free (dwarf2_section_info_def
, data
->types
);
18661 if (data
->dwo_files
)
18662 free_dwo_files (data
->dwo_files
, objfile
);
18664 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
18665 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
18669 /* The "save gdb-index" command. */
18671 /* The contents of the hash table we create when building the string
18673 struct strtab_entry
18675 offset_type offset
;
18679 /* Hash function for a strtab_entry.
18681 Function is used only during write_hash_table so no index format backward
18682 compatibility is needed. */
18685 hash_strtab_entry (const void *e
)
18687 const struct strtab_entry
*entry
= e
;
18688 return mapped_index_string_hash (INT_MAX
, entry
->str
);
18691 /* Equality function for a strtab_entry. */
18694 eq_strtab_entry (const void *a
, const void *b
)
18696 const struct strtab_entry
*ea
= a
;
18697 const struct strtab_entry
*eb
= b
;
18698 return !strcmp (ea
->str
, eb
->str
);
18701 /* Create a strtab_entry hash table. */
18704 create_strtab (void)
18706 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
18707 xfree
, xcalloc
, xfree
);
18710 /* Add a string to the constant pool. Return the string's offset in
18714 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
18717 struct strtab_entry entry
;
18718 struct strtab_entry
*result
;
18721 slot
= htab_find_slot (table
, &entry
, INSERT
);
18726 result
= XNEW (struct strtab_entry
);
18727 result
->offset
= obstack_object_size (cpool
);
18729 obstack_grow_str0 (cpool
, str
);
18732 return result
->offset
;
18735 /* An entry in the symbol table. */
18736 struct symtab_index_entry
18738 /* The name of the symbol. */
18740 /* The offset of the name in the constant pool. */
18741 offset_type index_offset
;
18742 /* A sorted vector of the indices of all the CUs that hold an object
18744 VEC (offset_type
) *cu_indices
;
18747 /* The symbol table. This is a power-of-2-sized hash table. */
18748 struct mapped_symtab
18750 offset_type n_elements
;
18752 struct symtab_index_entry
**data
;
18755 /* Hash function for a symtab_index_entry. */
18758 hash_symtab_entry (const void *e
)
18760 const struct symtab_index_entry
*entry
= e
;
18761 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
18762 sizeof (offset_type
) * VEC_length (offset_type
,
18763 entry
->cu_indices
),
18767 /* Equality function for a symtab_index_entry. */
18770 eq_symtab_entry (const void *a
, const void *b
)
18772 const struct symtab_index_entry
*ea
= a
;
18773 const struct symtab_index_entry
*eb
= b
;
18774 int len
= VEC_length (offset_type
, ea
->cu_indices
);
18775 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
18777 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
18778 VEC_address (offset_type
, eb
->cu_indices
),
18779 sizeof (offset_type
) * len
);
18782 /* Destroy a symtab_index_entry. */
18785 delete_symtab_entry (void *p
)
18787 struct symtab_index_entry
*entry
= p
;
18788 VEC_free (offset_type
, entry
->cu_indices
);
18792 /* Create a hash table holding symtab_index_entry objects. */
18795 create_symbol_hash_table (void)
18797 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
18798 delete_symtab_entry
, xcalloc
, xfree
);
18801 /* Create a new mapped symtab object. */
18803 static struct mapped_symtab
*
18804 create_mapped_symtab (void)
18806 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
18807 symtab
->n_elements
= 0;
18808 symtab
->size
= 1024;
18809 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
18813 /* Destroy a mapped_symtab. */
18816 cleanup_mapped_symtab (void *p
)
18818 struct mapped_symtab
*symtab
= p
;
18819 /* The contents of the array are freed when the other hash table is
18821 xfree (symtab
->data
);
18825 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
18828 Function is used only during write_hash_table so no index format backward
18829 compatibility is needed. */
18831 static struct symtab_index_entry
**
18832 find_slot (struct mapped_symtab
*symtab
, const char *name
)
18834 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
18836 index
= hash
& (symtab
->size
- 1);
18837 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
18841 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
18842 return &symtab
->data
[index
];
18843 index
= (index
+ step
) & (symtab
->size
- 1);
18847 /* Expand SYMTAB's hash table. */
18850 hash_expand (struct mapped_symtab
*symtab
)
18852 offset_type old_size
= symtab
->size
;
18854 struct symtab_index_entry
**old_entries
= symtab
->data
;
18857 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
18859 for (i
= 0; i
< old_size
; ++i
)
18861 if (old_entries
[i
])
18863 struct symtab_index_entry
**slot
= find_slot (symtab
,
18864 old_entries
[i
]->name
);
18865 *slot
= old_entries
[i
];
18869 xfree (old_entries
);
18872 /* Add an entry to SYMTAB. NAME is the name of the symbol.
18873 CU_INDEX is the index of the CU in which the symbol appears.
18874 IS_STATIC is one if the symbol is static, otherwise zero (global). */
18877 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
18878 int is_static
, gdb_index_symbol_kind kind
,
18879 offset_type cu_index
)
18881 struct symtab_index_entry
**slot
;
18882 offset_type cu_index_and_attrs
;
18884 ++symtab
->n_elements
;
18885 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
18886 hash_expand (symtab
);
18888 slot
= find_slot (symtab
, name
);
18891 *slot
= XNEW (struct symtab_index_entry
);
18892 (*slot
)->name
= name
;
18893 /* index_offset is set later. */
18894 (*slot
)->cu_indices
= NULL
;
18897 cu_index_and_attrs
= 0;
18898 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
18899 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
18900 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
18902 /* We don't want to record an index value twice as we want to avoid the
18904 We process all global symbols and then all static symbols
18905 (which would allow us to avoid the duplication by only having to check
18906 the last entry pushed), but a symbol could have multiple kinds in one CU.
18907 To keep things simple we don't worry about the duplication here and
18908 sort and uniqufy the list after we've processed all symbols. */
18909 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
18912 /* qsort helper routine for uniquify_cu_indices. */
18915 offset_type_compare (const void *ap
, const void *bp
)
18917 offset_type a
= *(offset_type
*) ap
;
18918 offset_type b
= *(offset_type
*) bp
;
18920 return (a
> b
) - (b
> a
);
18923 /* Sort and remove duplicates of all symbols' cu_indices lists. */
18926 uniquify_cu_indices (struct mapped_symtab
*symtab
)
18930 for (i
= 0; i
< symtab
->size
; ++i
)
18932 struct symtab_index_entry
*entry
= symtab
->data
[i
];
18935 && entry
->cu_indices
!= NULL
)
18937 unsigned int next_to_insert
, next_to_check
;
18938 offset_type last_value
;
18940 qsort (VEC_address (offset_type
, entry
->cu_indices
),
18941 VEC_length (offset_type
, entry
->cu_indices
),
18942 sizeof (offset_type
), offset_type_compare
);
18944 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
18945 next_to_insert
= 1;
18946 for (next_to_check
= 1;
18947 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
18950 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
18953 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
18955 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
18960 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
18965 /* Add a vector of indices to the constant pool. */
18968 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
18969 struct symtab_index_entry
*entry
)
18973 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
18976 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
18977 offset_type val
= MAYBE_SWAP (len
);
18982 entry
->index_offset
= obstack_object_size (cpool
);
18984 obstack_grow (cpool
, &val
, sizeof (val
));
18986 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
18989 val
= MAYBE_SWAP (iter
);
18990 obstack_grow (cpool
, &val
, sizeof (val
));
18995 struct symtab_index_entry
*old_entry
= *slot
;
18996 entry
->index_offset
= old_entry
->index_offset
;
18999 return entry
->index_offset
;
19002 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
19003 constant pool entries going into the obstack CPOOL. */
19006 write_hash_table (struct mapped_symtab
*symtab
,
19007 struct obstack
*output
, struct obstack
*cpool
)
19010 htab_t symbol_hash_table
;
19013 symbol_hash_table
= create_symbol_hash_table ();
19014 str_table
= create_strtab ();
19016 /* We add all the index vectors to the constant pool first, to
19017 ensure alignment is ok. */
19018 for (i
= 0; i
< symtab
->size
; ++i
)
19020 if (symtab
->data
[i
])
19021 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
19024 /* Now write out the hash table. */
19025 for (i
= 0; i
< symtab
->size
; ++i
)
19027 offset_type str_off
, vec_off
;
19029 if (symtab
->data
[i
])
19031 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
19032 vec_off
= symtab
->data
[i
]->index_offset
;
19036 /* While 0 is a valid constant pool index, it is not valid
19037 to have 0 for both offsets. */
19042 str_off
= MAYBE_SWAP (str_off
);
19043 vec_off
= MAYBE_SWAP (vec_off
);
19045 obstack_grow (output
, &str_off
, sizeof (str_off
));
19046 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
19049 htab_delete (str_table
);
19050 htab_delete (symbol_hash_table
);
19053 /* Struct to map psymtab to CU index in the index file. */
19054 struct psymtab_cu_index_map
19056 struct partial_symtab
*psymtab
;
19057 unsigned int cu_index
;
19061 hash_psymtab_cu_index (const void *item
)
19063 const struct psymtab_cu_index_map
*map
= item
;
19065 return htab_hash_pointer (map
->psymtab
);
19069 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
19071 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
19072 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
19074 return lhs
->psymtab
== rhs
->psymtab
;
19077 /* Helper struct for building the address table. */
19078 struct addrmap_index_data
19080 struct objfile
*objfile
;
19081 struct obstack
*addr_obstack
;
19082 htab_t cu_index_htab
;
19084 /* Non-zero if the previous_* fields are valid.
19085 We can't write an entry until we see the next entry (since it is only then
19086 that we know the end of the entry). */
19087 int previous_valid
;
19088 /* Index of the CU in the table of all CUs in the index file. */
19089 unsigned int previous_cu_index
;
19090 /* Start address of the CU. */
19091 CORE_ADDR previous_cu_start
;
19094 /* Write an address entry to OBSTACK. */
19097 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
19098 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
19100 offset_type cu_index_to_write
;
19102 CORE_ADDR baseaddr
;
19104 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19106 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
19107 obstack_grow (obstack
, addr
, 8);
19108 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
19109 obstack_grow (obstack
, addr
, 8);
19110 cu_index_to_write
= MAYBE_SWAP (cu_index
);
19111 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
19114 /* Worker function for traversing an addrmap to build the address table. */
19117 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
19119 struct addrmap_index_data
*data
= datap
;
19120 struct partial_symtab
*pst
= obj
;
19122 if (data
->previous_valid
)
19123 add_address_entry (data
->objfile
, data
->addr_obstack
,
19124 data
->previous_cu_start
, start_addr
,
19125 data
->previous_cu_index
);
19127 data
->previous_cu_start
= start_addr
;
19130 struct psymtab_cu_index_map find_map
, *map
;
19131 find_map
.psymtab
= pst
;
19132 map
= htab_find (data
->cu_index_htab
, &find_map
);
19133 gdb_assert (map
!= NULL
);
19134 data
->previous_cu_index
= map
->cu_index
;
19135 data
->previous_valid
= 1;
19138 data
->previous_valid
= 0;
19143 /* Write OBJFILE's address map to OBSTACK.
19144 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
19145 in the index file. */
19148 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
19149 htab_t cu_index_htab
)
19151 struct addrmap_index_data addrmap_index_data
;
19153 /* When writing the address table, we have to cope with the fact that
19154 the addrmap iterator only provides the start of a region; we have to
19155 wait until the next invocation to get the start of the next region. */
19157 addrmap_index_data
.objfile
= objfile
;
19158 addrmap_index_data
.addr_obstack
= obstack
;
19159 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
19160 addrmap_index_data
.previous_valid
= 0;
19162 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
19163 &addrmap_index_data
);
19165 /* It's highly unlikely the last entry (end address = 0xff...ff)
19166 is valid, but we should still handle it.
19167 The end address is recorded as the start of the next region, but that
19168 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
19170 if (addrmap_index_data
.previous_valid
)
19171 add_address_entry (objfile
, obstack
,
19172 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
19173 addrmap_index_data
.previous_cu_index
);
19176 /* Return the symbol kind of PSYM. */
19178 static gdb_index_symbol_kind
19179 symbol_kind (struct partial_symbol
*psym
)
19181 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
19182 enum address_class aclass
= PSYMBOL_CLASS (psym
);
19190 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
19192 return GDB_INDEX_SYMBOL_KIND_TYPE
;
19194 case LOC_CONST_BYTES
:
19195 case LOC_OPTIMIZED_OUT
:
19197 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
19199 /* Note: It's currently impossible to recognize psyms as enum values
19200 short of reading the type info. For now punt. */
19201 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
19203 /* There are other LOC_FOO values that one might want to classify
19204 as variables, but dwarf2read.c doesn't currently use them. */
19205 return GDB_INDEX_SYMBOL_KIND_OTHER
;
19207 case STRUCT_DOMAIN
:
19208 return GDB_INDEX_SYMBOL_KIND_TYPE
;
19210 return GDB_INDEX_SYMBOL_KIND_OTHER
;
19214 /* Add a list of partial symbols to SYMTAB. */
19217 write_psymbols (struct mapped_symtab
*symtab
,
19219 struct partial_symbol
**psymp
,
19221 offset_type cu_index
,
19224 for (; count
-- > 0; ++psymp
)
19226 struct partial_symbol
*psym
= *psymp
;
19229 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
19230 error (_("Ada is not currently supported by the index"));
19232 /* Only add a given psymbol once. */
19233 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
19236 gdb_index_symbol_kind kind
= symbol_kind (psym
);
19239 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
19240 is_static
, kind
, cu_index
);
19245 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
19246 exception if there is an error. */
19249 write_obstack (FILE *file
, struct obstack
*obstack
)
19251 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
19253 != obstack_object_size (obstack
))
19254 error (_("couldn't data write to file"));
19257 /* Unlink a file if the argument is not NULL. */
19260 unlink_if_set (void *p
)
19262 char **filename
= p
;
19264 unlink (*filename
);
19267 /* A helper struct used when iterating over debug_types. */
19268 struct signatured_type_index_data
19270 struct objfile
*objfile
;
19271 struct mapped_symtab
*symtab
;
19272 struct obstack
*types_list
;
19277 /* A helper function that writes a single signatured_type to an
19281 write_one_signatured_type (void **slot
, void *d
)
19283 struct signatured_type_index_data
*info
= d
;
19284 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
19285 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
19286 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
19289 write_psymbols (info
->symtab
,
19291 info
->objfile
->global_psymbols
.list
19292 + psymtab
->globals_offset
,
19293 psymtab
->n_global_syms
, info
->cu_index
,
19295 write_psymbols (info
->symtab
,
19297 info
->objfile
->static_psymbols
.list
19298 + psymtab
->statics_offset
,
19299 psymtab
->n_static_syms
, info
->cu_index
,
19302 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
19303 entry
->per_cu
.offset
.sect_off
);
19304 obstack_grow (info
->types_list
, val
, 8);
19305 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
19306 entry
->type_offset_in_tu
.cu_off
);
19307 obstack_grow (info
->types_list
, val
, 8);
19308 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
19309 obstack_grow (info
->types_list
, val
, 8);
19316 /* Recurse into all "included" dependencies and write their symbols as
19317 if they appeared in this psymtab. */
19320 recursively_write_psymbols (struct objfile
*objfile
,
19321 struct partial_symtab
*psymtab
,
19322 struct mapped_symtab
*symtab
,
19324 offset_type cu_index
)
19328 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
19329 if (psymtab
->dependencies
[i
]->user
!= NULL
)
19330 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
19331 symtab
, psyms_seen
, cu_index
);
19333 write_psymbols (symtab
,
19335 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
19336 psymtab
->n_global_syms
, cu_index
,
19338 write_psymbols (symtab
,
19340 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
19341 psymtab
->n_static_syms
, cu_index
,
19345 /* Create an index file for OBJFILE in the directory DIR. */
19348 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
19350 struct cleanup
*cleanup
;
19351 char *filename
, *cleanup_filename
;
19352 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
19353 struct obstack cu_list
, types_cu_list
;
19356 struct mapped_symtab
*symtab
;
19357 offset_type val
, size_of_contents
, total_len
;
19360 htab_t cu_index_htab
;
19361 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
19363 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
19366 if (dwarf2_per_objfile
->using_index
)
19367 error (_("Cannot use an index to create the index"));
19369 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
19370 error (_("Cannot make an index when the file has multiple .debug_types sections"));
19372 if (stat (objfile
->name
, &st
) < 0)
19373 perror_with_name (objfile
->name
);
19375 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
19376 INDEX_SUFFIX
, (char *) NULL
);
19377 cleanup
= make_cleanup (xfree
, filename
);
19379 out_file
= fopen (filename
, "wb");
19381 error (_("Can't open `%s' for writing"), filename
);
19383 cleanup_filename
= filename
;
19384 make_cleanup (unlink_if_set
, &cleanup_filename
);
19386 symtab
= create_mapped_symtab ();
19387 make_cleanup (cleanup_mapped_symtab
, symtab
);
19389 obstack_init (&addr_obstack
);
19390 make_cleanup_obstack_free (&addr_obstack
);
19392 obstack_init (&cu_list
);
19393 make_cleanup_obstack_free (&cu_list
);
19395 obstack_init (&types_cu_list
);
19396 make_cleanup_obstack_free (&types_cu_list
);
19398 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
19399 NULL
, xcalloc
, xfree
);
19400 make_cleanup_htab_delete (psyms_seen
);
19402 /* While we're scanning CU's create a table that maps a psymtab pointer
19403 (which is what addrmap records) to its index (which is what is recorded
19404 in the index file). This will later be needed to write the address
19406 cu_index_htab
= htab_create_alloc (100,
19407 hash_psymtab_cu_index
,
19408 eq_psymtab_cu_index
,
19409 NULL
, xcalloc
, xfree
);
19410 make_cleanup_htab_delete (cu_index_htab
);
19411 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
19412 xmalloc (sizeof (struct psymtab_cu_index_map
)
19413 * dwarf2_per_objfile
->n_comp_units
);
19414 make_cleanup (xfree
, psymtab_cu_index_map
);
19416 /* The CU list is already sorted, so we don't need to do additional
19417 work here. Also, the debug_types entries do not appear in
19418 all_comp_units, but only in their own hash table. */
19419 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
19421 struct dwarf2_per_cu_data
*per_cu
19422 = dwarf2_per_objfile
->all_comp_units
[i
];
19423 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
19425 struct psymtab_cu_index_map
*map
;
19428 if (psymtab
->user
== NULL
)
19429 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
19431 map
= &psymtab_cu_index_map
[i
];
19432 map
->psymtab
= psymtab
;
19434 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
19435 gdb_assert (slot
!= NULL
);
19436 gdb_assert (*slot
== NULL
);
19439 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
19440 per_cu
->offset
.sect_off
);
19441 obstack_grow (&cu_list
, val
, 8);
19442 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
19443 obstack_grow (&cu_list
, val
, 8);
19446 /* Dump the address map. */
19447 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
19449 /* Write out the .debug_type entries, if any. */
19450 if (dwarf2_per_objfile
->signatured_types
)
19452 struct signatured_type_index_data sig_data
;
19454 sig_data
.objfile
= objfile
;
19455 sig_data
.symtab
= symtab
;
19456 sig_data
.types_list
= &types_cu_list
;
19457 sig_data
.psyms_seen
= psyms_seen
;
19458 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
19459 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
19460 write_one_signatured_type
, &sig_data
);
19463 /* Now that we've processed all symbols we can shrink their cu_indices
19465 uniquify_cu_indices (symtab
);
19467 obstack_init (&constant_pool
);
19468 make_cleanup_obstack_free (&constant_pool
);
19469 obstack_init (&symtab_obstack
);
19470 make_cleanup_obstack_free (&symtab_obstack
);
19471 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
19473 obstack_init (&contents
);
19474 make_cleanup_obstack_free (&contents
);
19475 size_of_contents
= 6 * sizeof (offset_type
);
19476 total_len
= size_of_contents
;
19478 /* The version number. */
19479 val
= MAYBE_SWAP (7);
19480 obstack_grow (&contents
, &val
, sizeof (val
));
19482 /* The offset of the CU list from the start of the file. */
19483 val
= MAYBE_SWAP (total_len
);
19484 obstack_grow (&contents
, &val
, sizeof (val
));
19485 total_len
+= obstack_object_size (&cu_list
);
19487 /* The offset of the types CU list from the start of the file. */
19488 val
= MAYBE_SWAP (total_len
);
19489 obstack_grow (&contents
, &val
, sizeof (val
));
19490 total_len
+= obstack_object_size (&types_cu_list
);
19492 /* The offset of the address table from the start of the file. */
19493 val
= MAYBE_SWAP (total_len
);
19494 obstack_grow (&contents
, &val
, sizeof (val
));
19495 total_len
+= obstack_object_size (&addr_obstack
);
19497 /* The offset of the symbol table from the start of the file. */
19498 val
= MAYBE_SWAP (total_len
);
19499 obstack_grow (&contents
, &val
, sizeof (val
));
19500 total_len
+= obstack_object_size (&symtab_obstack
);
19502 /* The offset of the constant pool from the start of the file. */
19503 val
= MAYBE_SWAP (total_len
);
19504 obstack_grow (&contents
, &val
, sizeof (val
));
19505 total_len
+= obstack_object_size (&constant_pool
);
19507 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
19509 write_obstack (out_file
, &contents
);
19510 write_obstack (out_file
, &cu_list
);
19511 write_obstack (out_file
, &types_cu_list
);
19512 write_obstack (out_file
, &addr_obstack
);
19513 write_obstack (out_file
, &symtab_obstack
);
19514 write_obstack (out_file
, &constant_pool
);
19518 /* We want to keep the file, so we set cleanup_filename to NULL
19519 here. See unlink_if_set. */
19520 cleanup_filename
= NULL
;
19522 do_cleanups (cleanup
);
19525 /* Implementation of the `save gdb-index' command.
19527 Note that the file format used by this command is documented in the
19528 GDB manual. Any changes here must be documented there. */
19531 save_gdb_index_command (char *arg
, int from_tty
)
19533 struct objfile
*objfile
;
19536 error (_("usage: save gdb-index DIRECTORY"));
19538 ALL_OBJFILES (objfile
)
19542 /* If the objfile does not correspond to an actual file, skip it. */
19543 if (stat (objfile
->name
, &st
) < 0)
19546 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19547 if (dwarf2_per_objfile
)
19549 volatile struct gdb_exception except
;
19551 TRY_CATCH (except
, RETURN_MASK_ERROR
)
19553 write_psymtabs_to_index (objfile
, arg
);
19555 if (except
.reason
< 0)
19556 exception_fprintf (gdb_stderr
, except
,
19557 _("Error while writing index for `%s': "),
19565 int dwarf2_always_disassemble
;
19568 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
19569 struct cmd_list_element
*c
, const char *value
)
19571 fprintf_filtered (file
,
19572 _("Whether to always disassemble "
19573 "DWARF expressions is %s.\n"),
19578 show_check_physname (struct ui_file
*file
, int from_tty
,
19579 struct cmd_list_element
*c
, const char *value
)
19581 fprintf_filtered (file
,
19582 _("Whether to check \"physname\" is %s.\n"),
19586 void _initialize_dwarf2_read (void);
19589 _initialize_dwarf2_read (void)
19591 struct cmd_list_element
*c
;
19593 dwarf2_objfile_data_key
19594 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
19596 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
19597 Set DWARF 2 specific variables.\n\
19598 Configure DWARF 2 variables such as the cache size"),
19599 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
19600 0/*allow-unknown*/, &maintenance_set_cmdlist
);
19602 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
19603 Show DWARF 2 specific variables\n\
19604 Show DWARF 2 variables such as the cache size"),
19605 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
19606 0/*allow-unknown*/, &maintenance_show_cmdlist
);
19608 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
19609 &dwarf2_max_cache_age
, _("\
19610 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
19611 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
19612 A higher limit means that cached compilation units will be stored\n\
19613 in memory longer, and more total memory will be used. Zero disables\n\
19614 caching, which can slow down startup."),
19616 show_dwarf2_max_cache_age
,
19617 &set_dwarf2_cmdlist
,
19618 &show_dwarf2_cmdlist
);
19620 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
19621 &dwarf2_always_disassemble
, _("\
19622 Set whether `info address' always disassembles DWARF expressions."), _("\
19623 Show whether `info address' always disassembles DWARF expressions."), _("\
19624 When enabled, DWARF expressions are always printed in an assembly-like\n\
19625 syntax. When disabled, expressions will be printed in a more\n\
19626 conversational style, when possible."),
19628 show_dwarf2_always_disassemble
,
19629 &set_dwarf2_cmdlist
,
19630 &show_dwarf2_cmdlist
);
19632 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
19633 Set debugging of the dwarf2 reader."), _("\
19634 Show debugging of the dwarf2 reader."), _("\
19635 When enabled, debugging messages are printed during dwarf2 reading\n\
19636 and symtab expansion."),
19639 &setdebuglist
, &showdebuglist
);
19641 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
19642 Set debugging of the dwarf2 DIE reader."), _("\
19643 Show debugging of the dwarf2 DIE reader."), _("\
19644 When enabled (non-zero), DIEs are dumped after they are read in.\n\
19645 The value is the maximum depth to print."),
19648 &setdebuglist
, &showdebuglist
);
19650 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
19651 Set cross-checking of \"physname\" code against demangler."), _("\
19652 Show cross-checking of \"physname\" code against demangler."), _("\
19653 When enabled, GDB's internal \"physname\" code is checked against\n\
19655 NULL
, show_check_physname
,
19656 &setdebuglist
, &showdebuglist
);
19658 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
19660 Save a gdb-index file.\n\
19661 Usage: save gdb-index DIRECTORY"),
19663 set_cmd_completer (c
, filename_completer
);