1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2013 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "exceptions.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
74 #include "gdb_string.h"
75 #include "gdb_assert.h"
76 #include <sys/types.h>
78 typedef struct symbol
*symbolp
;
81 /* When non-zero, print basic high level tracing messages.
82 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
83 static int dwarf2_read_debug
= 0;
85 /* When non-zero, dump DIEs after they are read in. */
86 static unsigned int dwarf2_die_debug
= 0;
88 /* When non-zero, cross-check physname against demangler. */
89 static int check_physname
= 0;
91 /* When non-zero, do not reject deprecated .gdb_index sections. */
92 static int use_deprecated_index_sections
= 0;
94 static const struct objfile_data
*dwarf2_objfile_data_key
;
96 /* The "aclass" indices for various kinds of computed DWARF symbols. */
98 static int dwarf2_locexpr_index
;
99 static int dwarf2_loclist_index
;
100 static int dwarf2_locexpr_block_index
;
101 static int dwarf2_loclist_block_index
;
103 struct dwarf2_section_info
106 const gdb_byte
*buffer
;
108 /* True if we have tried to read this section. */
112 typedef struct dwarf2_section_info dwarf2_section_info_def
;
113 DEF_VEC_O (dwarf2_section_info_def
);
115 /* All offsets in the index are of this type. It must be
116 architecture-independent. */
117 typedef uint32_t offset_type
;
119 DEF_VEC_I (offset_type
);
121 /* Ensure only legit values are used. */
122 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
124 gdb_assert ((unsigned int) (value) <= 1); \
125 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
128 /* Ensure only legit values are used. */
129 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
131 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
132 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
133 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
136 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
137 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
139 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
140 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
143 /* A description of the mapped index. The file format is described in
144 a comment by the code that writes the index. */
147 /* Index data format version. */
150 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte
*address_table
;
156 /* Size of the address table data in bytes. */
157 offset_type address_table_size
;
159 /* The symbol table, implemented as a hash table. */
160 const offset_type
*symbol_table
;
162 /* Size in slots, each slot is 2 offset_types. */
163 offset_type symbol_table_slots
;
165 /* A pointer to the constant pool. */
166 const char *constant_pool
;
169 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
170 DEF_VEC_P (dwarf2_per_cu_ptr
);
172 /* Collection of data recorded per objfile.
173 This hangs off of dwarf2_objfile_data_key. */
175 struct dwarf2_per_objfile
177 struct dwarf2_section_info info
;
178 struct dwarf2_section_info abbrev
;
179 struct dwarf2_section_info line
;
180 struct dwarf2_section_info loc
;
181 struct dwarf2_section_info macinfo
;
182 struct dwarf2_section_info macro
;
183 struct dwarf2_section_info str
;
184 struct dwarf2_section_info ranges
;
185 struct dwarf2_section_info addr
;
186 struct dwarf2_section_info frame
;
187 struct dwarf2_section_info eh_frame
;
188 struct dwarf2_section_info gdb_index
;
190 VEC (dwarf2_section_info_def
) *types
;
193 struct objfile
*objfile
;
195 /* Table of all the compilation units. This is used to locate
196 the target compilation unit of a particular reference. */
197 struct dwarf2_per_cu_data
**all_comp_units
;
199 /* The number of compilation units in ALL_COMP_UNITS. */
202 /* The number of .debug_types-related CUs. */
205 /* The .debug_types-related CUs (TUs). */
206 struct signatured_type
**all_type_units
;
208 /* The number of entries in all_type_unit_groups. */
209 int n_type_unit_groups
;
211 /* Table of type unit groups.
212 This exists to make it easy to iterate over all CUs and TU groups. */
213 struct type_unit_group
**all_type_unit_groups
;
215 /* Table of struct type_unit_group objects.
216 The hash key is the DW_AT_stmt_list value. */
217 htab_t type_unit_groups
;
219 /* A table mapping .debug_types signatures to its signatured_type entry.
220 This is NULL if the .debug_types section hasn't been read in yet. */
221 htab_t signatured_types
;
223 /* Type unit statistics, to see how well the scaling improvements
227 int nr_uniq_abbrev_tables
;
229 int nr_symtab_sharers
;
230 int nr_stmt_less_type_units
;
233 /* A chain of compilation units that are currently read in, so that
234 they can be freed later. */
235 struct dwarf2_per_cu_data
*read_in_chain
;
237 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
238 This is NULL if the table hasn't been allocated yet. */
241 /* Non-zero if we've check for whether there is a DWP file. */
244 /* The DWP file if there is one, or NULL. */
245 struct dwp_file
*dwp_file
;
247 /* The shared '.dwz' file, if one exists. This is used when the
248 original data was compressed using 'dwz -m'. */
249 struct dwz_file
*dwz_file
;
251 /* A flag indicating wether this objfile has a section loaded at a
253 int has_section_at_zero
;
255 /* True if we are using the mapped index,
256 or we are faking it for OBJF_READNOW's sake. */
257 unsigned char using_index
;
259 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
260 struct mapped_index
*index_table
;
262 /* When using index_table, this keeps track of all quick_file_names entries.
263 TUs typically share line table entries with a CU, so we maintain a
264 separate table of all line table entries to support the sharing.
265 Note that while there can be way more TUs than CUs, we've already
266 sorted all the TUs into "type unit groups", grouped by their
267 DW_AT_stmt_list value. Therefore the only sharing done here is with a
268 CU and its associated TU group if there is one. */
269 htab_t quick_file_names_table
;
271 /* Set during partial symbol reading, to prevent queueing of full
273 int reading_partial_symbols
;
275 /* Table mapping type DIEs to their struct type *.
276 This is NULL if not allocated yet.
277 The mapping is done via (CU/TU + DIE offset) -> type. */
278 htab_t die_type_hash
;
280 /* The CUs we recently read. */
281 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
284 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
286 /* Default names of the debugging sections. */
288 /* Note that if the debugging section has been compressed, it might
289 have a name like .zdebug_info. */
291 static const struct dwarf2_debug_sections dwarf2_elf_names
=
293 { ".debug_info", ".zdebug_info" },
294 { ".debug_abbrev", ".zdebug_abbrev" },
295 { ".debug_line", ".zdebug_line" },
296 { ".debug_loc", ".zdebug_loc" },
297 { ".debug_macinfo", ".zdebug_macinfo" },
298 { ".debug_macro", ".zdebug_macro" },
299 { ".debug_str", ".zdebug_str" },
300 { ".debug_ranges", ".zdebug_ranges" },
301 { ".debug_types", ".zdebug_types" },
302 { ".debug_addr", ".zdebug_addr" },
303 { ".debug_frame", ".zdebug_frame" },
304 { ".eh_frame", NULL
},
305 { ".gdb_index", ".zgdb_index" },
309 /* List of DWO/DWP sections. */
311 static const struct dwop_section_names
313 struct dwarf2_section_names abbrev_dwo
;
314 struct dwarf2_section_names info_dwo
;
315 struct dwarf2_section_names line_dwo
;
316 struct dwarf2_section_names loc_dwo
;
317 struct dwarf2_section_names macinfo_dwo
;
318 struct dwarf2_section_names macro_dwo
;
319 struct dwarf2_section_names str_dwo
;
320 struct dwarf2_section_names str_offsets_dwo
;
321 struct dwarf2_section_names types_dwo
;
322 struct dwarf2_section_names cu_index
;
323 struct dwarf2_section_names tu_index
;
327 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
328 { ".debug_info.dwo", ".zdebug_info.dwo" },
329 { ".debug_line.dwo", ".zdebug_line.dwo" },
330 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
331 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
332 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
333 { ".debug_str.dwo", ".zdebug_str.dwo" },
334 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
335 { ".debug_types.dwo", ".zdebug_types.dwo" },
336 { ".debug_cu_index", ".zdebug_cu_index" },
337 { ".debug_tu_index", ".zdebug_tu_index" },
340 /* local data types */
342 /* The data in a compilation unit header, after target2host
343 translation, looks like this. */
344 struct comp_unit_head
348 unsigned char addr_size
;
349 unsigned char signed_addr_p
;
350 sect_offset abbrev_offset
;
352 /* Size of file offsets; either 4 or 8. */
353 unsigned int offset_size
;
355 /* Size of the length field; either 4 or 12. */
356 unsigned int initial_length_size
;
358 /* Offset to the first byte of this compilation unit header in the
359 .debug_info section, for resolving relative reference dies. */
362 /* Offset to first die in this cu from the start of the cu.
363 This will be the first byte following the compilation unit header. */
364 cu_offset first_die_offset
;
367 /* Type used for delaying computation of method physnames.
368 See comments for compute_delayed_physnames. */
369 struct delayed_method_info
371 /* The type to which the method is attached, i.e., its parent class. */
374 /* The index of the method in the type's function fieldlists. */
377 /* The index of the method in the fieldlist. */
380 /* The name of the DIE. */
383 /* The DIE associated with this method. */
384 struct die_info
*die
;
387 typedef struct delayed_method_info delayed_method_info
;
388 DEF_VEC_O (delayed_method_info
);
390 /* Internal state when decoding a particular compilation unit. */
393 /* The objfile containing this compilation unit. */
394 struct objfile
*objfile
;
396 /* The header of the compilation unit. */
397 struct comp_unit_head header
;
399 /* Base address of this compilation unit. */
400 CORE_ADDR base_address
;
402 /* Non-zero if base_address has been set. */
405 /* The language we are debugging. */
406 enum language language
;
407 const struct language_defn
*language_defn
;
409 const char *producer
;
411 /* The generic symbol table building routines have separate lists for
412 file scope symbols and all all other scopes (local scopes). So
413 we need to select the right one to pass to add_symbol_to_list().
414 We do it by keeping a pointer to the correct list in list_in_scope.
416 FIXME: The original dwarf code just treated the file scope as the
417 first local scope, and all other local scopes as nested local
418 scopes, and worked fine. Check to see if we really need to
419 distinguish these in buildsym.c. */
420 struct pending
**list_in_scope
;
422 /* The abbrev table for this CU.
423 Normally this points to the abbrev table in the objfile.
424 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
425 struct abbrev_table
*abbrev_table
;
427 /* Hash table holding all the loaded partial DIEs
428 with partial_die->offset.SECT_OFF as hash. */
431 /* Storage for things with the same lifetime as this read-in compilation
432 unit, including partial DIEs. */
433 struct obstack comp_unit_obstack
;
435 /* When multiple dwarf2_cu structures are living in memory, this field
436 chains them all together, so that they can be released efficiently.
437 We will probably also want a generation counter so that most-recently-used
438 compilation units are cached... */
439 struct dwarf2_per_cu_data
*read_in_chain
;
441 /* Backchain to our per_cu entry if the tree has been built. */
442 struct dwarf2_per_cu_data
*per_cu
;
444 /* How many compilation units ago was this CU last referenced? */
447 /* A hash table of DIE cu_offset for following references with
448 die_info->offset.sect_off as hash. */
451 /* Full DIEs if read in. */
452 struct die_info
*dies
;
454 /* A set of pointers to dwarf2_per_cu_data objects for compilation
455 units referenced by this one. Only set during full symbol processing;
456 partial symbol tables do not have dependencies. */
459 /* Header data from the line table, during full symbol processing. */
460 struct line_header
*line_header
;
462 /* A list of methods which need to have physnames computed
463 after all type information has been read. */
464 VEC (delayed_method_info
) *method_list
;
466 /* To be copied to symtab->call_site_htab. */
467 htab_t call_site_htab
;
469 /* Non-NULL if this CU came from a DWO file.
470 There is an invariant here that is important to remember:
471 Except for attributes copied from the top level DIE in the "main"
472 (or "stub") file in preparation for reading the DWO file
473 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
474 Either there isn't a DWO file (in which case this is NULL and the point
475 is moot), or there is and either we're not going to read it (in which
476 case this is NULL) or there is and we are reading it (in which case this
478 struct dwo_unit
*dwo_unit
;
480 /* The DW_AT_addr_base attribute if present, zero otherwise
481 (zero is a valid value though).
482 Note this value comes from the stub CU/TU's DIE. */
485 /* The DW_AT_ranges_base attribute if present, zero otherwise
486 (zero is a valid value though).
487 Note this value comes from the stub CU/TU's DIE.
488 Also note that the value is zero in the non-DWO case so this value can
489 be used without needing to know whether DWO files are in use or not.
490 N.B. This does not apply to DW_AT_ranges appearing in
491 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
492 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
493 DW_AT_ranges_base *would* have to be applied, and we'd have to care
494 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
495 ULONGEST ranges_base
;
497 /* Mark used when releasing cached dies. */
498 unsigned int mark
: 1;
500 /* This CU references .debug_loc. See the symtab->locations_valid field.
501 This test is imperfect as there may exist optimized debug code not using
502 any location list and still facing inlining issues if handled as
503 unoptimized code. For a future better test see GCC PR other/32998. */
504 unsigned int has_loclist
: 1;
506 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
507 if all the producer_is_* fields are valid. This information is cached
508 because profiling CU expansion showed excessive time spent in
509 producer_is_gxx_lt_4_6. */
510 unsigned int checked_producer
: 1;
511 unsigned int producer_is_gxx_lt_4_6
: 1;
512 unsigned int producer_is_gcc_lt_4_3
: 1;
513 unsigned int producer_is_icc
: 1;
515 /* When set, the file that we're processing is known to have
516 debugging info for C++ namespaces. GCC 3.3.x did not produce
517 this information, but later versions do. */
519 unsigned int processing_has_namespace_info
: 1;
522 /* Persistent data held for a compilation unit, even when not
523 processing it. We put a pointer to this structure in the
524 read_symtab_private field of the psymtab. */
526 struct dwarf2_per_cu_data
528 /* The start offset and length of this compilation unit.
529 NOTE: Unlike comp_unit_head.length, this length includes
531 If the DIE refers to a DWO file, this is always of the original die,
536 /* Flag indicating this compilation unit will be read in before
537 any of the current compilation units are processed. */
538 unsigned int queued
: 1;
540 /* This flag will be set when reading partial DIEs if we need to load
541 absolutely all DIEs for this compilation unit, instead of just the ones
542 we think are interesting. It gets set if we look for a DIE in the
543 hash table and don't find it. */
544 unsigned int load_all_dies
: 1;
546 /* Non-zero if this CU is from .debug_types.
547 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
549 unsigned int is_debug_types
: 1;
551 /* Non-zero if this CU is from the .dwz file. */
552 unsigned int is_dwz
: 1;
554 /* The section this CU/TU lives in.
555 If the DIE refers to a DWO file, this is always the original die,
557 struct dwarf2_section_info
*section
;
559 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
560 of the CU cache it gets reset to NULL again. */
561 struct dwarf2_cu
*cu
;
563 /* The corresponding objfile.
564 Normally we can get the objfile from dwarf2_per_objfile.
565 However we can enter this file with just a "per_cu" handle. */
566 struct objfile
*objfile
;
568 /* When using partial symbol tables, the 'psymtab' field is active.
569 Otherwise the 'quick' field is active. */
572 /* The partial symbol table associated with this compilation unit,
573 or NULL for unread partial units. */
574 struct partial_symtab
*psymtab
;
576 /* Data needed by the "quick" functions. */
577 struct dwarf2_per_cu_quick_data
*quick
;
580 /* The CUs we import using DW_TAG_imported_unit. This is filled in
581 while reading psymtabs, used to compute the psymtab dependencies,
582 and then cleared. Then it is filled in again while reading full
583 symbols, and only deleted when the objfile is destroyed.
585 This is also used to work around a difference between the way gold
586 generates .gdb_index version <=7 and the way gdb does. Arguably this
587 is a gold bug. For symbols coming from TUs, gold records in the index
588 the CU that includes the TU instead of the TU itself. This breaks
589 dw2_lookup_symbol: It assumes that if the index says symbol X lives
590 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
591 will find X. Alas TUs live in their own symtab, so after expanding CU Y
592 we need to look in TU Z to find X. Fortunately, this is akin to
593 DW_TAG_imported_unit, so we just use the same mechanism: For
594 .gdb_index version <=7 this also records the TUs that the CU referred
595 to. Concurrently with this change gdb was modified to emit version 8
596 indices so we only pay a price for gold generated indices. */
597 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
600 /* Entry in the signatured_types hash table. */
602 struct signatured_type
604 /* The "per_cu" object of this type.
605 This struct is used iff per_cu.is_debug_types.
606 N.B.: This is the first member so that it's easy to convert pointers
608 struct dwarf2_per_cu_data per_cu
;
610 /* The type's signature. */
613 /* Offset in the TU of the type's DIE, as read from the TU header.
614 If this TU is a DWO stub and the definition lives in a DWO file
615 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
616 cu_offset type_offset_in_tu
;
618 /* Offset in the section of the type's DIE.
619 If the definition lives in a DWO file, this is the offset in the
620 .debug_types.dwo section.
621 The value is zero until the actual value is known.
622 Zero is otherwise not a valid section offset. */
623 sect_offset type_offset_in_section
;
625 /* Type units are grouped by their DW_AT_stmt_list entry so that they
626 can share them. This points to the containing symtab. */
627 struct type_unit_group
*type_unit_group
;
630 The first time we encounter this type we fully read it in and install it
631 in the symbol tables. Subsequent times we only need the type. */
635 typedef struct signatured_type
*sig_type_ptr
;
636 DEF_VEC_P (sig_type_ptr
);
638 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
639 This includes type_unit_group and quick_file_names. */
641 struct stmt_list_hash
643 /* The DWO unit this table is from or NULL if there is none. */
644 struct dwo_unit
*dwo_unit
;
646 /* Offset in .debug_line or .debug_line.dwo. */
647 sect_offset line_offset
;
650 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
651 an object of this type. */
653 struct type_unit_group
655 /* dwarf2read.c's main "handle" on a TU symtab.
656 To simplify things we create an artificial CU that "includes" all the
657 type units using this stmt_list so that the rest of the code still has
658 a "per_cu" handle on the symtab.
659 This PER_CU is recognized by having no section. */
660 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
661 struct dwarf2_per_cu_data per_cu
;
663 /* The TUs that share this DW_AT_stmt_list entry.
664 This is added to while parsing type units to build partial symtabs,
665 and is deleted afterwards and not used again. */
666 VEC (sig_type_ptr
) *tus
;
668 /* The primary symtab.
669 Type units in a group needn't all be defined in the same source file,
670 so we create an essentially anonymous symtab as the primary symtab. */
671 struct symtab
*primary_symtab
;
673 /* The data used to construct the hash key. */
674 struct stmt_list_hash hash
;
676 /* The number of symtabs from the line header.
677 The value here must match line_header.num_file_names. */
678 unsigned int num_symtabs
;
680 /* The symbol tables for this TU (obtained from the files listed in
682 WARNING: The order of entries here must match the order of entries
683 in the line header. After the first TU using this type_unit_group, the
684 line header for the subsequent TUs is recreated from this. This is done
685 because we need to use the same symtabs for each TU using the same
686 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
687 there's no guarantee the line header doesn't have duplicate entries. */
688 struct symtab
**symtabs
;
691 /* These sections are what may appear in a DWO file. */
695 struct dwarf2_section_info abbrev
;
696 struct dwarf2_section_info line
;
697 struct dwarf2_section_info loc
;
698 struct dwarf2_section_info macinfo
;
699 struct dwarf2_section_info macro
;
700 struct dwarf2_section_info str
;
701 struct dwarf2_section_info str_offsets
;
702 /* In the case of a virtual DWO file, these two are unused. */
703 struct dwarf2_section_info info
;
704 VEC (dwarf2_section_info_def
) *types
;
707 /* CUs/TUs in DWP/DWO files. */
711 /* Backlink to the containing struct dwo_file. */
712 struct dwo_file
*dwo_file
;
714 /* The "id" that distinguishes this CU/TU.
715 .debug_info calls this "dwo_id", .debug_types calls this "signature".
716 Since signatures came first, we stick with it for consistency. */
719 /* The section this CU/TU lives in, in the DWO file. */
720 struct dwarf2_section_info
*section
;
722 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
726 /* For types, offset in the type's DIE of the type defined by this TU. */
727 cu_offset type_offset_in_tu
;
730 /* Data for one DWO file.
731 This includes virtual DWO files that have been packaged into a
736 /* The DW_AT_GNU_dwo_name attribute.
737 For virtual DWO files the name is constructed from the section offsets
738 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
739 from related CU+TUs. */
740 const char *dwo_name
;
742 /* The DW_AT_comp_dir attribute. */
743 const char *comp_dir
;
745 /* The bfd, when the file is open. Otherwise this is NULL.
746 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
749 /* Section info for this file. */
750 struct dwo_sections sections
;
752 /* The CU in the file.
753 We only support one because having more than one requires hacking the
754 dwo_name of each to match, which is highly unlikely to happen.
755 Doing this means all TUs can share comp_dir: We also assume that
756 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
759 /* Table of TUs in the file.
760 Each element is a struct dwo_unit. */
764 /* These sections are what may appear in a DWP file. */
768 struct dwarf2_section_info str
;
769 struct dwarf2_section_info cu_index
;
770 struct dwarf2_section_info tu_index
;
771 /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
772 by section number. We don't need to record them here. */
775 /* These sections are what may appear in a virtual DWO file. */
777 struct virtual_dwo_sections
779 struct dwarf2_section_info abbrev
;
780 struct dwarf2_section_info line
;
781 struct dwarf2_section_info loc
;
782 struct dwarf2_section_info macinfo
;
783 struct dwarf2_section_info macro
;
784 struct dwarf2_section_info str_offsets
;
785 /* Each DWP hash table entry records one CU or one TU.
786 That is recorded here, and copied to dwo_unit.section. */
787 struct dwarf2_section_info info_or_types
;
790 /* Contents of DWP hash tables. */
792 struct dwp_hash_table
794 uint32_t nr_units
, nr_slots
;
795 const gdb_byte
*hash_table
, *unit_table
, *section_pool
;
798 /* Data for one DWP file. */
802 /* Name of the file. */
805 /* The bfd, when the file is open. Otherwise this is NULL. */
808 /* Section info for this file. */
809 struct dwp_sections sections
;
811 /* Table of CUs in the file. */
812 const struct dwp_hash_table
*cus
;
814 /* Table of TUs in the file. */
815 const struct dwp_hash_table
*tus
;
817 /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
820 /* Table to map ELF section numbers to their sections. */
821 unsigned int num_sections
;
822 asection
**elf_sections
;
825 /* This represents a '.dwz' file. */
829 /* A dwz file can only contain a few sections. */
830 struct dwarf2_section_info abbrev
;
831 struct dwarf2_section_info info
;
832 struct dwarf2_section_info str
;
833 struct dwarf2_section_info line
;
834 struct dwarf2_section_info macro
;
835 struct dwarf2_section_info gdb_index
;
841 /* Struct used to pass misc. parameters to read_die_and_children, et
842 al. which are used for both .debug_info and .debug_types dies.
843 All parameters here are unchanging for the life of the call. This
844 struct exists to abstract away the constant parameters of die reading. */
846 struct die_reader_specs
848 /* die_section->asection->owner. */
851 /* The CU of the DIE we are parsing. */
852 struct dwarf2_cu
*cu
;
854 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
855 struct dwo_file
*dwo_file
;
857 /* The section the die comes from.
858 This is either .debug_info or .debug_types, or the .dwo variants. */
859 struct dwarf2_section_info
*die_section
;
861 /* die_section->buffer. */
862 const gdb_byte
*buffer
;
864 /* The end of the buffer. */
865 const gdb_byte
*buffer_end
;
868 /* Type of function passed to init_cutu_and_read_dies, et.al. */
869 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
870 const gdb_byte
*info_ptr
,
871 struct die_info
*comp_unit_die
,
875 /* The line number information for a compilation unit (found in the
876 .debug_line section) begins with a "statement program header",
877 which contains the following information. */
880 unsigned int total_length
;
881 unsigned short version
;
882 unsigned int header_length
;
883 unsigned char minimum_instruction_length
;
884 unsigned char maximum_ops_per_instruction
;
885 unsigned char default_is_stmt
;
887 unsigned char line_range
;
888 unsigned char opcode_base
;
890 /* standard_opcode_lengths[i] is the number of operands for the
891 standard opcode whose value is i. This means that
892 standard_opcode_lengths[0] is unused, and the last meaningful
893 element is standard_opcode_lengths[opcode_base - 1]. */
894 unsigned char *standard_opcode_lengths
;
896 /* The include_directories table. NOTE! These strings are not
897 allocated with xmalloc; instead, they are pointers into
898 debug_line_buffer. If you try to free them, `free' will get
900 unsigned int num_include_dirs
, include_dirs_size
;
901 const char **include_dirs
;
903 /* The file_names table. NOTE! These strings are not allocated
904 with xmalloc; instead, they are pointers into debug_line_buffer.
905 Don't try to free them directly. */
906 unsigned int num_file_names
, file_names_size
;
910 unsigned int dir_index
;
911 unsigned int mod_time
;
913 int included_p
; /* Non-zero if referenced by the Line Number Program. */
914 struct symtab
*symtab
; /* The associated symbol table, if any. */
917 /* The start and end of the statement program following this
918 header. These point into dwarf2_per_objfile->line_buffer. */
919 const gdb_byte
*statement_program_start
, *statement_program_end
;
922 /* When we construct a partial symbol table entry we only
923 need this much information. */
924 struct partial_die_info
926 /* Offset of this DIE. */
929 /* DWARF-2 tag for this DIE. */
930 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
932 /* Assorted flags describing the data found in this DIE. */
933 unsigned int has_children
: 1;
934 unsigned int is_external
: 1;
935 unsigned int is_declaration
: 1;
936 unsigned int has_type
: 1;
937 unsigned int has_specification
: 1;
938 unsigned int has_pc_info
: 1;
939 unsigned int may_be_inlined
: 1;
941 /* Flag set if the SCOPE field of this structure has been
943 unsigned int scope_set
: 1;
945 /* Flag set if the DIE has a byte_size attribute. */
946 unsigned int has_byte_size
: 1;
948 /* Flag set if any of the DIE's children are template arguments. */
949 unsigned int has_template_arguments
: 1;
951 /* Flag set if fixup_partial_die has been called on this die. */
952 unsigned int fixup_called
: 1;
954 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
955 unsigned int is_dwz
: 1;
957 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
958 unsigned int spec_is_dwz
: 1;
960 /* The name of this DIE. Normally the value of DW_AT_name, but
961 sometimes a default name for unnamed DIEs. */
964 /* The linkage name, if present. */
965 const char *linkage_name
;
967 /* The scope to prepend to our children. This is generally
968 allocated on the comp_unit_obstack, so will disappear
969 when this compilation unit leaves the cache. */
972 /* Some data associated with the partial DIE. The tag determines
973 which field is live. */
976 /* The location description associated with this DIE, if any. */
977 struct dwarf_block
*locdesc
;
978 /* The offset of an import, for DW_TAG_imported_unit. */
982 /* If HAS_PC_INFO, the PC range associated with this DIE. */
986 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
987 DW_AT_sibling, if any. */
988 /* NOTE: This member isn't strictly necessary, read_partial_die could
989 return DW_AT_sibling values to its caller load_partial_dies. */
990 const gdb_byte
*sibling
;
992 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
993 DW_AT_specification (or DW_AT_abstract_origin or
995 sect_offset spec_offset
;
997 /* Pointers to this DIE's parent, first child, and next sibling,
999 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1002 /* This data structure holds the information of an abbrev. */
1005 unsigned int number
; /* number identifying abbrev */
1006 enum dwarf_tag tag
; /* dwarf tag */
1007 unsigned short has_children
; /* boolean */
1008 unsigned short num_attrs
; /* number of attributes */
1009 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1010 struct abbrev_info
*next
; /* next in chain */
1015 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1016 ENUM_BITFIELD(dwarf_form
) form
: 16;
1019 /* Size of abbrev_table.abbrev_hash_table. */
1020 #define ABBREV_HASH_SIZE 121
1022 /* Top level data structure to contain an abbreviation table. */
1026 /* Where the abbrev table came from.
1027 This is used as a sanity check when the table is used. */
1030 /* Storage for the abbrev table. */
1031 struct obstack abbrev_obstack
;
1033 /* Hash table of abbrevs.
1034 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1035 It could be statically allocated, but the previous code didn't so we
1037 struct abbrev_info
**abbrevs
;
1040 /* Attributes have a name and a value. */
1043 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1044 ENUM_BITFIELD(dwarf_form
) form
: 15;
1046 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1047 field should be in u.str (existing only for DW_STRING) but it is kept
1048 here for better struct attribute alignment. */
1049 unsigned int string_is_canonical
: 1;
1054 struct dwarf_block
*blk
;
1063 /* This data structure holds a complete die structure. */
1066 /* DWARF-2 tag for this DIE. */
1067 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1069 /* Number of attributes */
1070 unsigned char num_attrs
;
1072 /* True if we're presently building the full type name for the
1073 type derived from this DIE. */
1074 unsigned char building_fullname
: 1;
1077 unsigned int abbrev
;
1079 /* Offset in .debug_info or .debug_types section. */
1082 /* The dies in a compilation unit form an n-ary tree. PARENT
1083 points to this die's parent; CHILD points to the first child of
1084 this node; and all the children of a given node are chained
1085 together via their SIBLING fields. */
1086 struct die_info
*child
; /* Its first child, if any. */
1087 struct die_info
*sibling
; /* Its next sibling, if any. */
1088 struct die_info
*parent
; /* Its parent, if any. */
1090 /* An array of attributes, with NUM_ATTRS elements. There may be
1091 zero, but it's not common and zero-sized arrays are not
1092 sufficiently portable C. */
1093 struct attribute attrs
[1];
1096 /* Get at parts of an attribute structure. */
1098 #define DW_STRING(attr) ((attr)->u.str)
1099 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1100 #define DW_UNSND(attr) ((attr)->u.unsnd)
1101 #define DW_BLOCK(attr) ((attr)->u.blk)
1102 #define DW_SND(attr) ((attr)->u.snd)
1103 #define DW_ADDR(attr) ((attr)->u.addr)
1104 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1106 /* Blocks are a bunch of untyped bytes. */
1111 /* Valid only if SIZE is not zero. */
1112 const gdb_byte
*data
;
1115 #ifndef ATTR_ALLOC_CHUNK
1116 #define ATTR_ALLOC_CHUNK 4
1119 /* Allocate fields for structs, unions and enums in this size. */
1120 #ifndef DW_FIELD_ALLOC_CHUNK
1121 #define DW_FIELD_ALLOC_CHUNK 4
1124 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1125 but this would require a corresponding change in unpack_field_as_long
1127 static int bits_per_byte
= 8;
1129 /* The routines that read and process dies for a C struct or C++ class
1130 pass lists of data member fields and lists of member function fields
1131 in an instance of a field_info structure, as defined below. */
1134 /* List of data member and baseclasses fields. */
1137 struct nextfield
*next
;
1142 *fields
, *baseclasses
;
1144 /* Number of fields (including baseclasses). */
1147 /* Number of baseclasses. */
1150 /* Set if the accesibility of one of the fields is not public. */
1151 int non_public_fields
;
1153 /* Member function fields array, entries are allocated in the order they
1154 are encountered in the object file. */
1157 struct nextfnfield
*next
;
1158 struct fn_field fnfield
;
1162 /* Member function fieldlist array, contains name of possibly overloaded
1163 member function, number of overloaded member functions and a pointer
1164 to the head of the member function field chain. */
1169 struct nextfnfield
*head
;
1173 /* Number of entries in the fnfieldlists array. */
1176 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1177 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1178 struct typedef_field_list
1180 struct typedef_field field
;
1181 struct typedef_field_list
*next
;
1183 *typedef_field_list
;
1184 unsigned typedef_field_list_count
;
1187 /* One item on the queue of compilation units to read in full symbols
1189 struct dwarf2_queue_item
1191 struct dwarf2_per_cu_data
*per_cu
;
1192 enum language pretend_language
;
1193 struct dwarf2_queue_item
*next
;
1196 /* The current queue. */
1197 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1199 /* Loaded secondary compilation units are kept in memory until they
1200 have not been referenced for the processing of this many
1201 compilation units. Set this to zero to disable caching. Cache
1202 sizes of up to at least twenty will improve startup time for
1203 typical inter-CU-reference binaries, at an obvious memory cost. */
1204 static int dwarf2_max_cache_age
= 5;
1206 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1207 struct cmd_list_element
*c
, const char *value
)
1209 fprintf_filtered (file
, _("The upper bound on the age of cached "
1210 "dwarf2 compilation units is %s.\n"),
1215 /* Various complaints about symbol reading that don't abort the process. */
1218 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1220 complaint (&symfile_complaints
,
1221 _("statement list doesn't fit in .debug_line section"));
1225 dwarf2_debug_line_missing_file_complaint (void)
1227 complaint (&symfile_complaints
,
1228 _(".debug_line section has line data without a file"));
1232 dwarf2_debug_line_missing_end_sequence_complaint (void)
1234 complaint (&symfile_complaints
,
1235 _(".debug_line section has line "
1236 "program sequence without an end"));
1240 dwarf2_complex_location_expr_complaint (void)
1242 complaint (&symfile_complaints
, _("location expression too complex"));
1246 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1249 complaint (&symfile_complaints
,
1250 _("const value length mismatch for '%s', got %d, expected %d"),
1255 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1257 complaint (&symfile_complaints
,
1258 _("debug info runs off end of %s section"
1260 section
->asection
->name
,
1261 bfd_get_filename (section
->asection
->owner
));
1265 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1267 complaint (&symfile_complaints
,
1268 _("macro debug info contains a "
1269 "malformed macro definition:\n`%s'"),
1274 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1276 complaint (&symfile_complaints
,
1277 _("invalid attribute class or form for '%s' in '%s'"),
1281 /* local function prototypes */
1283 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1285 static void dwarf2_find_base_address (struct die_info
*die
,
1286 struct dwarf2_cu
*cu
);
1288 static struct partial_symtab
*create_partial_symtab
1289 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1291 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1293 static void scan_partial_symbols (struct partial_die_info
*,
1294 CORE_ADDR
*, CORE_ADDR
*,
1295 int, struct dwarf2_cu
*);
1297 static void add_partial_symbol (struct partial_die_info
*,
1298 struct dwarf2_cu
*);
1300 static void add_partial_namespace (struct partial_die_info
*pdi
,
1301 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1302 int need_pc
, struct dwarf2_cu
*cu
);
1304 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1305 CORE_ADDR
*highpc
, int need_pc
,
1306 struct dwarf2_cu
*cu
);
1308 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1309 struct dwarf2_cu
*cu
);
1311 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1312 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1313 int need_pc
, struct dwarf2_cu
*cu
);
1315 static void dwarf2_read_symtab (struct partial_symtab
*,
1318 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1320 static struct abbrev_info
*abbrev_table_lookup_abbrev
1321 (const struct abbrev_table
*, unsigned int);
1323 static struct abbrev_table
*abbrev_table_read_table
1324 (struct dwarf2_section_info
*, sect_offset
);
1326 static void abbrev_table_free (struct abbrev_table
*);
1328 static void abbrev_table_free_cleanup (void *);
1330 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1331 struct dwarf2_section_info
*);
1333 static void dwarf2_free_abbrev_table (void *);
1335 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1337 static struct partial_die_info
*load_partial_dies
1338 (const struct die_reader_specs
*, const gdb_byte
*, int);
1340 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1341 struct partial_die_info
*,
1342 struct abbrev_info
*,
1346 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1347 struct dwarf2_cu
*);
1349 static void fixup_partial_die (struct partial_die_info
*,
1350 struct dwarf2_cu
*);
1352 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1353 struct attribute
*, struct attr_abbrev
*,
1356 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1358 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1360 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1362 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1364 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1366 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1369 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1371 static LONGEST read_checked_initial_length_and_offset
1372 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1373 unsigned int *, unsigned int *);
1375 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1376 const struct comp_unit_head
*,
1379 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1381 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1384 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1386 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1388 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1389 const struct comp_unit_head
*,
1392 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1394 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1396 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1398 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1402 static const char *read_str_index (const struct die_reader_specs
*reader
,
1403 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1405 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1407 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1408 struct dwarf2_cu
*);
1410 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1413 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1414 struct dwarf2_cu
*cu
);
1416 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1418 static struct die_info
*die_specification (struct die_info
*die
,
1419 struct dwarf2_cu
**);
1421 static void free_line_header (struct line_header
*lh
);
1423 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1424 struct dwarf2_cu
*cu
);
1426 static void dwarf_decode_lines (struct line_header
*, const char *,
1427 struct dwarf2_cu
*, struct partial_symtab
*,
1430 static void dwarf2_start_subfile (const char *, const char *, const char *);
1432 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1433 const char *, const char *, CORE_ADDR
);
1435 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1436 struct dwarf2_cu
*);
1438 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1439 struct dwarf2_cu
*, struct symbol
*);
1441 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1442 struct dwarf2_cu
*);
1444 static void dwarf2_const_value_attr (struct attribute
*attr
,
1447 struct obstack
*obstack
,
1448 struct dwarf2_cu
*cu
, LONGEST
*value
,
1449 const gdb_byte
**bytes
,
1450 struct dwarf2_locexpr_baton
**baton
);
1452 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1454 static int need_gnat_info (struct dwarf2_cu
*);
1456 static struct type
*die_descriptive_type (struct die_info
*,
1457 struct dwarf2_cu
*);
1459 static void set_descriptive_type (struct type
*, struct die_info
*,
1460 struct dwarf2_cu
*);
1462 static struct type
*die_containing_type (struct die_info
*,
1463 struct dwarf2_cu
*);
1465 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1466 struct dwarf2_cu
*);
1468 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1470 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1472 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1474 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1475 const char *suffix
, int physname
,
1476 struct dwarf2_cu
*cu
);
1478 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1480 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1482 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1484 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1486 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1488 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1489 struct dwarf2_cu
*, struct partial_symtab
*);
1491 static int dwarf2_get_pc_bounds (struct die_info
*,
1492 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1493 struct partial_symtab
*);
1495 static void get_scope_pc_bounds (struct die_info
*,
1496 CORE_ADDR
*, CORE_ADDR
*,
1497 struct dwarf2_cu
*);
1499 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1500 CORE_ADDR
, struct dwarf2_cu
*);
1502 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1503 struct dwarf2_cu
*);
1505 static void dwarf2_attach_fields_to_type (struct field_info
*,
1506 struct type
*, struct dwarf2_cu
*);
1508 static void dwarf2_add_member_fn (struct field_info
*,
1509 struct die_info
*, struct type
*,
1510 struct dwarf2_cu
*);
1512 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1514 struct dwarf2_cu
*);
1516 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1518 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1520 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1522 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1524 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1526 static struct type
*read_module_type (struct die_info
*die
,
1527 struct dwarf2_cu
*cu
);
1529 static const char *namespace_name (struct die_info
*die
,
1530 int *is_anonymous
, struct dwarf2_cu
*);
1532 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1534 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1536 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1537 struct dwarf2_cu
*);
1539 static struct die_info
*read_die_and_siblings_1
1540 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1543 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1544 const gdb_byte
*info_ptr
,
1545 const gdb_byte
**new_info_ptr
,
1546 struct die_info
*parent
);
1548 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1549 struct die_info
**, const gdb_byte
*,
1552 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1553 struct die_info
**, const gdb_byte
*,
1556 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1558 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1561 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1563 static const char *dwarf2_full_name (const char *name
,
1564 struct die_info
*die
,
1565 struct dwarf2_cu
*cu
);
1567 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1568 struct dwarf2_cu
*cu
);
1570 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1571 struct dwarf2_cu
**);
1573 static const char *dwarf_tag_name (unsigned int);
1575 static const char *dwarf_attr_name (unsigned int);
1577 static const char *dwarf_form_name (unsigned int);
1579 static char *dwarf_bool_name (unsigned int);
1581 static const char *dwarf_type_encoding_name (unsigned int);
1583 static struct die_info
*sibling_die (struct die_info
*);
1585 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1587 static void dump_die_for_error (struct die_info
*);
1589 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1592 /*static*/ void dump_die (struct die_info
*, int max_level
);
1594 static void store_in_ref_table (struct die_info
*,
1595 struct dwarf2_cu
*);
1597 static int is_ref_attr (struct attribute
*);
1599 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1601 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1603 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1605 struct dwarf2_cu
**);
1607 static struct die_info
*follow_die_ref (struct die_info
*,
1609 struct dwarf2_cu
**);
1611 static struct die_info
*follow_die_sig (struct die_info
*,
1613 struct dwarf2_cu
**);
1615 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1616 struct dwarf2_cu
*);
1618 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1620 struct dwarf2_cu
*);
1622 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1624 static void read_signatured_type (struct signatured_type
*);
1626 static struct type_unit_group
*get_type_unit_group
1627 (struct dwarf2_cu
*, struct attribute
*);
1629 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1631 /* memory allocation interface */
1633 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1635 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1637 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1640 static int attr_form_is_block (struct attribute
*);
1642 static int attr_form_is_section_offset (struct attribute
*);
1644 static int attr_form_is_constant (struct attribute
*);
1646 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1647 struct dwarf2_loclist_baton
*baton
,
1648 struct attribute
*attr
);
1650 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1652 struct dwarf2_cu
*cu
,
1655 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1656 const gdb_byte
*info_ptr
,
1657 struct abbrev_info
*abbrev
);
1659 static void free_stack_comp_unit (void *);
1661 static hashval_t
partial_die_hash (const void *item
);
1663 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1665 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1666 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1668 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1669 struct dwarf2_per_cu_data
*per_cu
);
1671 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1672 struct die_info
*comp_unit_die
,
1673 enum language pretend_language
);
1675 static void free_heap_comp_unit (void *);
1677 static void free_cached_comp_units (void *);
1679 static void age_cached_comp_units (void);
1681 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1683 static struct type
*set_die_type (struct die_info
*, struct type
*,
1684 struct dwarf2_cu
*);
1686 static void create_all_comp_units (struct objfile
*);
1688 static int create_all_type_units (struct objfile
*);
1690 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1693 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1696 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1699 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1700 struct dwarf2_per_cu_data
*);
1702 static void dwarf2_mark (struct dwarf2_cu
*);
1704 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1706 static struct type
*get_die_type_at_offset (sect_offset
,
1707 struct dwarf2_per_cu_data
*);
1709 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1711 static void dwarf2_release_queue (void *dummy
);
1713 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1714 enum language pretend_language
);
1716 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1717 struct dwarf2_per_cu_data
*per_cu
,
1718 enum language pretend_language
);
1720 static void process_queue (void);
1722 static void find_file_and_directory (struct die_info
*die
,
1723 struct dwarf2_cu
*cu
,
1724 const char **name
, const char **comp_dir
);
1726 static char *file_full_name (int file
, struct line_header
*lh
,
1727 const char *comp_dir
);
1729 static const gdb_byte
*read_and_check_comp_unit_head
1730 (struct comp_unit_head
*header
,
1731 struct dwarf2_section_info
*section
,
1732 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1733 int is_debug_types_section
);
1735 static void init_cutu_and_read_dies
1736 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1737 int use_existing_cu
, int keep
,
1738 die_reader_func_ftype
*die_reader_func
, void *data
);
1740 static void init_cutu_and_read_dies_simple
1741 (struct dwarf2_per_cu_data
*this_cu
,
1742 die_reader_func_ftype
*die_reader_func
, void *data
);
1744 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1746 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1748 static struct dwo_unit
*lookup_dwo_comp_unit
1749 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1751 static struct dwo_unit
*lookup_dwo_type_unit
1752 (struct signatured_type
*, const char *, const char *);
1754 static void free_dwo_file_cleanup (void *);
1756 static void process_cu_includes (void);
1758 static void check_producer (struct dwarf2_cu
*cu
);
1762 /* Convert VALUE between big- and little-endian. */
1764 byte_swap (offset_type value
)
1768 result
= (value
& 0xff) << 24;
1769 result
|= (value
& 0xff00) << 8;
1770 result
|= (value
& 0xff0000) >> 8;
1771 result
|= (value
& 0xff000000) >> 24;
1775 #define MAYBE_SWAP(V) byte_swap (V)
1778 #define MAYBE_SWAP(V) (V)
1779 #endif /* WORDS_BIGENDIAN */
1781 /* The suffix for an index file. */
1782 #define INDEX_SUFFIX ".gdb-index"
1784 /* Try to locate the sections we need for DWARF 2 debugging
1785 information and return true if we have enough to do something.
1786 NAMES points to the dwarf2 section names, or is NULL if the standard
1787 ELF names are used. */
1790 dwarf2_has_info (struct objfile
*objfile
,
1791 const struct dwarf2_debug_sections
*names
)
1793 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1794 if (!dwarf2_per_objfile
)
1796 /* Initialize per-objfile state. */
1797 struct dwarf2_per_objfile
*data
1798 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1800 memset (data
, 0, sizeof (*data
));
1801 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1802 dwarf2_per_objfile
= data
;
1804 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1806 dwarf2_per_objfile
->objfile
= objfile
;
1808 return (dwarf2_per_objfile
->info
.asection
!= NULL
1809 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1812 /* When loading sections, we look either for uncompressed section or for
1813 compressed section names. */
1816 section_is_p (const char *section_name
,
1817 const struct dwarf2_section_names
*names
)
1819 if (names
->normal
!= NULL
1820 && strcmp (section_name
, names
->normal
) == 0)
1822 if (names
->compressed
!= NULL
1823 && strcmp (section_name
, names
->compressed
) == 0)
1828 /* This function is mapped across the sections and remembers the
1829 offset and size of each of the debugging sections we are interested
1833 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1835 const struct dwarf2_debug_sections
*names
;
1836 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1839 names
= &dwarf2_elf_names
;
1841 names
= (const struct dwarf2_debug_sections
*) vnames
;
1843 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1846 else if (section_is_p (sectp
->name
, &names
->info
))
1848 dwarf2_per_objfile
->info
.asection
= sectp
;
1849 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1851 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1853 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1854 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1856 else if (section_is_p (sectp
->name
, &names
->line
))
1858 dwarf2_per_objfile
->line
.asection
= sectp
;
1859 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1861 else if (section_is_p (sectp
->name
, &names
->loc
))
1863 dwarf2_per_objfile
->loc
.asection
= sectp
;
1864 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1866 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1868 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1869 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1871 else if (section_is_p (sectp
->name
, &names
->macro
))
1873 dwarf2_per_objfile
->macro
.asection
= sectp
;
1874 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1876 else if (section_is_p (sectp
->name
, &names
->str
))
1878 dwarf2_per_objfile
->str
.asection
= sectp
;
1879 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1881 else if (section_is_p (sectp
->name
, &names
->addr
))
1883 dwarf2_per_objfile
->addr
.asection
= sectp
;
1884 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1886 else if (section_is_p (sectp
->name
, &names
->frame
))
1888 dwarf2_per_objfile
->frame
.asection
= sectp
;
1889 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1891 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1893 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1894 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1896 else if (section_is_p (sectp
->name
, &names
->ranges
))
1898 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1899 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1901 else if (section_is_p (sectp
->name
, &names
->types
))
1903 struct dwarf2_section_info type_section
;
1905 memset (&type_section
, 0, sizeof (type_section
));
1906 type_section
.asection
= sectp
;
1907 type_section
.size
= bfd_get_section_size (sectp
);
1909 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1912 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1914 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1915 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1918 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1919 && bfd_section_vma (abfd
, sectp
) == 0)
1920 dwarf2_per_objfile
->has_section_at_zero
= 1;
1923 /* A helper function that decides whether a section is empty,
1927 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1929 return info
->asection
== NULL
|| info
->size
== 0;
1932 /* Read the contents of the section INFO.
1933 OBJFILE is the main object file, but not necessarily the file where
1934 the section comes from. E.g., for DWO files INFO->asection->owner
1935 is the bfd of the DWO file.
1936 If the section is compressed, uncompress it before returning. */
1939 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1941 asection
*sectp
= info
->asection
;
1943 gdb_byte
*buf
, *retbuf
;
1944 unsigned char header
[4];
1948 info
->buffer
= NULL
;
1951 if (dwarf2_section_empty_p (info
))
1954 abfd
= sectp
->owner
;
1956 /* If the section has relocations, we must read it ourselves.
1957 Otherwise we attach it to the BFD. */
1958 if ((sectp
->flags
& SEC_RELOC
) == 0)
1960 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
1964 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1967 /* When debugging .o files, we may need to apply relocations; see
1968 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1969 We never compress sections in .o files, so we only need to
1970 try this when the section is not compressed. */
1971 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1974 info
->buffer
= retbuf
;
1978 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1979 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1980 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1981 bfd_get_filename (abfd
));
1984 /* A helper function that returns the size of a section in a safe way.
1985 If you are positive that the section has been read before using the
1986 size, then it is safe to refer to the dwarf2_section_info object's
1987 "size" field directly. In other cases, you must call this
1988 function, because for compressed sections the size field is not set
1989 correctly until the section has been read. */
1991 static bfd_size_type
1992 dwarf2_section_size (struct objfile
*objfile
,
1993 struct dwarf2_section_info
*info
)
1996 dwarf2_read_section (objfile
, info
);
2000 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2004 dwarf2_get_section_info (struct objfile
*objfile
,
2005 enum dwarf2_section_enum sect
,
2006 asection
**sectp
, const gdb_byte
**bufp
,
2007 bfd_size_type
*sizep
)
2009 struct dwarf2_per_objfile
*data
2010 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2011 struct dwarf2_section_info
*info
;
2013 /* We may see an objfile without any DWARF, in which case we just
2024 case DWARF2_DEBUG_FRAME
:
2025 info
= &data
->frame
;
2027 case DWARF2_EH_FRAME
:
2028 info
= &data
->eh_frame
;
2031 gdb_assert_not_reached ("unexpected section");
2034 dwarf2_read_section (objfile
, info
);
2036 *sectp
= info
->asection
;
2037 *bufp
= info
->buffer
;
2038 *sizep
= info
->size
;
2041 /* A helper function to find the sections for a .dwz file. */
2044 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2046 struct dwz_file
*dwz_file
= arg
;
2048 /* Note that we only support the standard ELF names, because .dwz
2049 is ELF-only (at the time of writing). */
2050 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2052 dwz_file
->abbrev
.asection
= sectp
;
2053 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2055 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2057 dwz_file
->info
.asection
= sectp
;
2058 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2060 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2062 dwz_file
->str
.asection
= sectp
;
2063 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2065 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2067 dwz_file
->line
.asection
= sectp
;
2068 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2070 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2072 dwz_file
->macro
.asection
= sectp
;
2073 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2075 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2077 dwz_file
->gdb_index
.asection
= sectp
;
2078 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2082 /* Open the separate '.dwz' debug file, if needed. Error if the file
2085 static struct dwz_file
*
2086 dwarf2_get_dwz_file (void)
2088 bfd
*abfd
, *dwz_bfd
;
2091 struct cleanup
*cleanup
;
2092 const char *filename
;
2093 struct dwz_file
*result
;
2095 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2096 return dwarf2_per_objfile
->dwz_file
;
2098 abfd
= dwarf2_per_objfile
->objfile
->obfd
;
2099 section
= bfd_get_section_by_name (abfd
, ".gnu_debugaltlink");
2100 if (section
== NULL
)
2101 error (_("could not find '.gnu_debugaltlink' section"));
2102 if (!bfd_malloc_and_get_section (abfd
, section
, &data
))
2103 error (_("could not read '.gnu_debugaltlink' section: %s"),
2104 bfd_errmsg (bfd_get_error ()));
2105 cleanup
= make_cleanup (xfree
, data
);
2107 filename
= (const char *) data
;
2108 if (!IS_ABSOLUTE_PATH (filename
))
2110 char *abs
= gdb_realpath (dwarf2_per_objfile
->objfile
->name
);
2113 make_cleanup (xfree
, abs
);
2114 abs
= ldirname (abs
);
2115 make_cleanup (xfree
, abs
);
2117 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2118 make_cleanup (xfree
, rel
);
2122 /* The format is just a NUL-terminated file name, followed by the
2123 build-id. For now, though, we ignore the build-id. */
2124 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2125 if (dwz_bfd
== NULL
)
2126 error (_("could not read '%s': %s"), filename
,
2127 bfd_errmsg (bfd_get_error ()));
2129 if (!bfd_check_format (dwz_bfd
, bfd_object
))
2131 gdb_bfd_unref (dwz_bfd
);
2132 error (_("file '%s' was not usable: %s"), filename
,
2133 bfd_errmsg (bfd_get_error ()));
2136 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2138 result
->dwz_bfd
= dwz_bfd
;
2140 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2142 do_cleanups (cleanup
);
2144 dwarf2_per_objfile
->dwz_file
= result
;
2148 /* DWARF quick_symbols_functions support. */
2150 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2151 unique line tables, so we maintain a separate table of all .debug_line
2152 derived entries to support the sharing.
2153 All the quick functions need is the list of file names. We discard the
2154 line_header when we're done and don't need to record it here. */
2155 struct quick_file_names
2157 /* The data used to construct the hash key. */
2158 struct stmt_list_hash hash
;
2160 /* The number of entries in file_names, real_names. */
2161 unsigned int num_file_names
;
2163 /* The file names from the line table, after being run through
2165 const char **file_names
;
2167 /* The file names from the line table after being run through
2168 gdb_realpath. These are computed lazily. */
2169 const char **real_names
;
2172 /* When using the index (and thus not using psymtabs), each CU has an
2173 object of this type. This is used to hold information needed by
2174 the various "quick" methods. */
2175 struct dwarf2_per_cu_quick_data
2177 /* The file table. This can be NULL if there was no file table
2178 or it's currently not read in.
2179 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2180 struct quick_file_names
*file_names
;
2182 /* The corresponding symbol table. This is NULL if symbols for this
2183 CU have not yet been read. */
2184 struct symtab
*symtab
;
2186 /* A temporary mark bit used when iterating over all CUs in
2187 expand_symtabs_matching. */
2188 unsigned int mark
: 1;
2190 /* True if we've tried to read the file table and found there isn't one.
2191 There will be no point in trying to read it again next time. */
2192 unsigned int no_file_data
: 1;
2195 /* Utility hash function for a stmt_list_hash. */
2198 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2202 if (stmt_list_hash
->dwo_unit
!= NULL
)
2203 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2204 v
+= stmt_list_hash
->line_offset
.sect_off
;
2208 /* Utility equality function for a stmt_list_hash. */
2211 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2212 const struct stmt_list_hash
*rhs
)
2214 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2216 if (lhs
->dwo_unit
!= NULL
2217 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2220 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2223 /* Hash function for a quick_file_names. */
2226 hash_file_name_entry (const void *e
)
2228 const struct quick_file_names
*file_data
= e
;
2230 return hash_stmt_list_entry (&file_data
->hash
);
2233 /* Equality function for a quick_file_names. */
2236 eq_file_name_entry (const void *a
, const void *b
)
2238 const struct quick_file_names
*ea
= a
;
2239 const struct quick_file_names
*eb
= b
;
2241 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2244 /* Delete function for a quick_file_names. */
2247 delete_file_name_entry (void *e
)
2249 struct quick_file_names
*file_data
= e
;
2252 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2254 xfree ((void*) file_data
->file_names
[i
]);
2255 if (file_data
->real_names
)
2256 xfree ((void*) file_data
->real_names
[i
]);
2259 /* The space for the struct itself lives on objfile_obstack,
2260 so we don't free it here. */
2263 /* Create a quick_file_names hash table. */
2266 create_quick_file_names_table (unsigned int nr_initial_entries
)
2268 return htab_create_alloc (nr_initial_entries
,
2269 hash_file_name_entry
, eq_file_name_entry
,
2270 delete_file_name_entry
, xcalloc
, xfree
);
2273 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2274 have to be created afterwards. You should call age_cached_comp_units after
2275 processing PER_CU->CU. dw2_setup must have been already called. */
2278 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2280 if (per_cu
->is_debug_types
)
2281 load_full_type_unit (per_cu
);
2283 load_full_comp_unit (per_cu
, language_minimal
);
2285 gdb_assert (per_cu
->cu
!= NULL
);
2287 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2290 /* Read in the symbols for PER_CU. */
2293 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2295 struct cleanup
*back_to
;
2297 /* Skip type_unit_groups, reading the type units they contain
2298 is handled elsewhere. */
2299 if (IS_TYPE_UNIT_GROUP (per_cu
))
2302 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2304 if (dwarf2_per_objfile
->using_index
2305 ? per_cu
->v
.quick
->symtab
== NULL
2306 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2308 queue_comp_unit (per_cu
, language_minimal
);
2314 /* Age the cache, releasing compilation units that have not
2315 been used recently. */
2316 age_cached_comp_units ();
2318 do_cleanups (back_to
);
2321 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2322 the objfile from which this CU came. Returns the resulting symbol
2325 static struct symtab
*
2326 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2328 gdb_assert (dwarf2_per_objfile
->using_index
);
2329 if (!per_cu
->v
.quick
->symtab
)
2331 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2332 increment_reading_symtab ();
2333 dw2_do_instantiate_symtab (per_cu
);
2334 process_cu_includes ();
2335 do_cleanups (back_to
);
2337 return per_cu
->v
.quick
->symtab
;
2340 /* Return the CU given its index.
2342 This is intended for loops like:
2344 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2345 + dwarf2_per_objfile->n_type_units); ++i)
2347 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2353 static struct dwarf2_per_cu_data
*
2354 dw2_get_cu (int index
)
2356 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2358 index
-= dwarf2_per_objfile
->n_comp_units
;
2359 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2360 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2363 return dwarf2_per_objfile
->all_comp_units
[index
];
2366 /* Return the primary CU given its index.
2367 The difference between this function and dw2_get_cu is in the handling
2368 of type units (TUs). Here we return the type_unit_group object.
2370 This is intended for loops like:
2372 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2373 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2375 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2381 static struct dwarf2_per_cu_data
*
2382 dw2_get_primary_cu (int index
)
2384 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2386 index
-= dwarf2_per_objfile
->n_comp_units
;
2387 gdb_assert (index
< dwarf2_per_objfile
->n_type_unit_groups
);
2388 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2391 return dwarf2_per_objfile
->all_comp_units
[index
];
2394 /* A helper for create_cus_from_index that handles a given list of
2398 create_cus_from_index_list (struct objfile
*objfile
,
2399 const gdb_byte
*cu_list
, offset_type n_elements
,
2400 struct dwarf2_section_info
*section
,
2406 for (i
= 0; i
< n_elements
; i
+= 2)
2408 struct dwarf2_per_cu_data
*the_cu
;
2409 ULONGEST offset
, length
;
2411 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2412 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2413 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2416 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2417 struct dwarf2_per_cu_data
);
2418 the_cu
->offset
.sect_off
= offset
;
2419 the_cu
->length
= length
;
2420 the_cu
->objfile
= objfile
;
2421 the_cu
->section
= section
;
2422 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2423 struct dwarf2_per_cu_quick_data
);
2424 the_cu
->is_dwz
= is_dwz
;
2425 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2429 /* Read the CU list from the mapped index, and use it to create all
2430 the CU objects for this objfile. */
2433 create_cus_from_index (struct objfile
*objfile
,
2434 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2435 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2437 struct dwz_file
*dwz
;
2439 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2440 dwarf2_per_objfile
->all_comp_units
2441 = obstack_alloc (&objfile
->objfile_obstack
,
2442 dwarf2_per_objfile
->n_comp_units
2443 * sizeof (struct dwarf2_per_cu_data
*));
2445 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2446 &dwarf2_per_objfile
->info
, 0, 0);
2448 if (dwz_elements
== 0)
2451 dwz
= dwarf2_get_dwz_file ();
2452 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2453 cu_list_elements
/ 2);
2456 /* Create the signatured type hash table from the index. */
2459 create_signatured_type_table_from_index (struct objfile
*objfile
,
2460 struct dwarf2_section_info
*section
,
2461 const gdb_byte
*bytes
,
2462 offset_type elements
)
2465 htab_t sig_types_hash
;
2467 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2468 dwarf2_per_objfile
->all_type_units
2469 = obstack_alloc (&objfile
->objfile_obstack
,
2470 dwarf2_per_objfile
->n_type_units
2471 * sizeof (struct signatured_type
*));
2473 sig_types_hash
= allocate_signatured_type_table (objfile
);
2475 for (i
= 0; i
< elements
; i
+= 3)
2477 struct signatured_type
*sig_type
;
2478 ULONGEST offset
, type_offset_in_tu
, signature
;
2481 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2482 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2483 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2485 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2488 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2489 struct signatured_type
);
2490 sig_type
->signature
= signature
;
2491 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2492 sig_type
->per_cu
.is_debug_types
= 1;
2493 sig_type
->per_cu
.section
= section
;
2494 sig_type
->per_cu
.offset
.sect_off
= offset
;
2495 sig_type
->per_cu
.objfile
= objfile
;
2496 sig_type
->per_cu
.v
.quick
2497 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2498 struct dwarf2_per_cu_quick_data
);
2500 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2503 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2506 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2509 /* Read the address map data from the mapped index, and use it to
2510 populate the objfile's psymtabs_addrmap. */
2513 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2515 const gdb_byte
*iter
, *end
;
2516 struct obstack temp_obstack
;
2517 struct addrmap
*mutable_map
;
2518 struct cleanup
*cleanup
;
2521 obstack_init (&temp_obstack
);
2522 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2523 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2525 iter
= index
->address_table
;
2526 end
= iter
+ index
->address_table_size
;
2528 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2532 ULONGEST hi
, lo
, cu_index
;
2533 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2535 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2537 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2540 if (cu_index
< dwarf2_per_objfile
->n_comp_units
)
2542 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2543 dw2_get_cu (cu_index
));
2547 complaint (&symfile_complaints
,
2548 _(".gdb_index address table has invalid CU number %u"),
2549 (unsigned) cu_index
);
2553 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2554 &objfile
->objfile_obstack
);
2555 do_cleanups (cleanup
);
2558 /* The hash function for strings in the mapped index. This is the same as
2559 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2560 implementation. This is necessary because the hash function is tied to the
2561 format of the mapped index file. The hash values do not have to match with
2564 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2567 mapped_index_string_hash (int index_version
, const void *p
)
2569 const unsigned char *str
= (const unsigned char *) p
;
2573 while ((c
= *str
++) != 0)
2575 if (index_version
>= 5)
2577 r
= r
* 67 + c
- 113;
2583 /* Find a slot in the mapped index INDEX for the object named NAME.
2584 If NAME is found, set *VEC_OUT to point to the CU vector in the
2585 constant pool and return 1. If NAME cannot be found, return 0. */
2588 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2589 offset_type
**vec_out
)
2591 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2593 offset_type slot
, step
;
2594 int (*cmp
) (const char *, const char *);
2596 if (current_language
->la_language
== language_cplus
2597 || current_language
->la_language
== language_java
2598 || current_language
->la_language
== language_fortran
)
2600 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2602 const char *paren
= strchr (name
, '(');
2608 dup
= xmalloc (paren
- name
+ 1);
2609 memcpy (dup
, name
, paren
- name
);
2610 dup
[paren
- name
] = 0;
2612 make_cleanup (xfree
, dup
);
2617 /* Index version 4 did not support case insensitive searches. But the
2618 indices for case insensitive languages are built in lowercase, therefore
2619 simulate our NAME being searched is also lowercased. */
2620 hash
= mapped_index_string_hash ((index
->version
== 4
2621 && case_sensitivity
== case_sensitive_off
2622 ? 5 : index
->version
),
2625 slot
= hash
& (index
->symbol_table_slots
- 1);
2626 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2627 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2631 /* Convert a slot number to an offset into the table. */
2632 offset_type i
= 2 * slot
;
2634 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2636 do_cleanups (back_to
);
2640 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2641 if (!cmp (name
, str
))
2643 *vec_out
= (offset_type
*) (index
->constant_pool
2644 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2645 do_cleanups (back_to
);
2649 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2653 /* A helper function that reads the .gdb_index from SECTION and fills
2654 in MAP. FILENAME is the name of the file containing the section;
2655 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2656 ok to use deprecated sections.
2658 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2659 out parameters that are filled in with information about the CU and
2660 TU lists in the section.
2662 Returns 1 if all went well, 0 otherwise. */
2665 read_index_from_section (struct objfile
*objfile
,
2666 const char *filename
,
2668 struct dwarf2_section_info
*section
,
2669 struct mapped_index
*map
,
2670 const gdb_byte
**cu_list
,
2671 offset_type
*cu_list_elements
,
2672 const gdb_byte
**types_list
,
2673 offset_type
*types_list_elements
)
2675 const gdb_byte
*addr
;
2676 offset_type version
;
2677 offset_type
*metadata
;
2680 if (dwarf2_section_empty_p (section
))
2683 /* Older elfutils strip versions could keep the section in the main
2684 executable while splitting it for the separate debug info file. */
2685 if ((bfd_get_file_flags (section
->asection
) & SEC_HAS_CONTENTS
) == 0)
2688 dwarf2_read_section (objfile
, section
);
2690 addr
= section
->buffer
;
2691 /* Version check. */
2692 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2693 /* Versions earlier than 3 emitted every copy of a psymbol. This
2694 causes the index to behave very poorly for certain requests. Version 3
2695 contained incomplete addrmap. So, it seems better to just ignore such
2699 static int warning_printed
= 0;
2700 if (!warning_printed
)
2702 warning (_("Skipping obsolete .gdb_index section in %s."),
2704 warning_printed
= 1;
2708 /* Index version 4 uses a different hash function than index version
2711 Versions earlier than 6 did not emit psymbols for inlined
2712 functions. Using these files will cause GDB not to be able to
2713 set breakpoints on inlined functions by name, so we ignore these
2714 indices unless the user has done
2715 "set use-deprecated-index-sections on". */
2716 if (version
< 6 && !deprecated_ok
)
2718 static int warning_printed
= 0;
2719 if (!warning_printed
)
2722 Skipping deprecated .gdb_index section in %s.\n\
2723 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2724 to use the section anyway."),
2726 warning_printed
= 1;
2730 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2731 of the TU (for symbols coming from TUs). It's just a performance bug, and
2732 we can't distinguish gdb-generated indices from gold-generated ones, so
2733 nothing to do here. */
2735 /* Indexes with higher version than the one supported by GDB may be no
2736 longer backward compatible. */
2740 map
->version
= version
;
2741 map
->total_size
= section
->size
;
2743 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2746 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2747 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2751 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2752 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2753 - MAYBE_SWAP (metadata
[i
]))
2757 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2758 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2759 - MAYBE_SWAP (metadata
[i
]));
2762 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2763 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2764 - MAYBE_SWAP (metadata
[i
]))
2765 / (2 * sizeof (offset_type
)));
2768 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2774 /* Read the index file. If everything went ok, initialize the "quick"
2775 elements of all the CUs and return 1. Otherwise, return 0. */
2778 dwarf2_read_index (struct objfile
*objfile
)
2780 struct mapped_index local_map
, *map
;
2781 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2782 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2784 if (!read_index_from_section (objfile
, objfile
->name
,
2785 use_deprecated_index_sections
,
2786 &dwarf2_per_objfile
->gdb_index
, &local_map
,
2787 &cu_list
, &cu_list_elements
,
2788 &types_list
, &types_list_elements
))
2791 /* Don't use the index if it's empty. */
2792 if (local_map
.symbol_table_slots
== 0)
2795 /* If there is a .dwz file, read it so we can get its CU list as
2797 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
2799 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
2800 struct mapped_index dwz_map
;
2801 const gdb_byte
*dwz_types_ignore
;
2802 offset_type dwz_types_elements_ignore
;
2804 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
2806 &dwz
->gdb_index
, &dwz_map
,
2807 &dwz_list
, &dwz_list_elements
,
2809 &dwz_types_elements_ignore
))
2811 warning (_("could not read '.gdb_index' section from %s; skipping"),
2812 bfd_get_filename (dwz
->dwz_bfd
));
2817 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
2820 if (types_list_elements
)
2822 struct dwarf2_section_info
*section
;
2824 /* We can only handle a single .debug_types when we have an
2826 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2829 section
= VEC_index (dwarf2_section_info_def
,
2830 dwarf2_per_objfile
->types
, 0);
2832 create_signatured_type_table_from_index (objfile
, section
, types_list
,
2833 types_list_elements
);
2836 create_addrmap_from_index (objfile
, &local_map
);
2838 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
2841 dwarf2_per_objfile
->index_table
= map
;
2842 dwarf2_per_objfile
->using_index
= 1;
2843 dwarf2_per_objfile
->quick_file_names_table
=
2844 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2849 /* A helper for the "quick" functions which sets the global
2850 dwarf2_per_objfile according to OBJFILE. */
2853 dw2_setup (struct objfile
*objfile
)
2855 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2856 gdb_assert (dwarf2_per_objfile
);
2859 /* die_reader_func for dw2_get_file_names. */
2862 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2863 const gdb_byte
*info_ptr
,
2864 struct die_info
*comp_unit_die
,
2868 struct dwarf2_cu
*cu
= reader
->cu
;
2869 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2870 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2871 struct dwarf2_per_cu_data
*lh_cu
;
2872 struct line_header
*lh
;
2873 struct attribute
*attr
;
2875 const char *name
, *comp_dir
;
2877 struct quick_file_names
*qfn
;
2878 unsigned int line_offset
;
2880 gdb_assert (! this_cu
->is_debug_types
);
2882 /* Our callers never want to match partial units -- instead they
2883 will match the enclosing full CU. */
2884 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2886 this_cu
->v
.quick
->no_file_data
= 1;
2895 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2898 struct quick_file_names find_entry
;
2900 line_offset
= DW_UNSND (attr
);
2902 /* We may have already read in this line header (TU line header sharing).
2903 If we have we're done. */
2904 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2905 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2906 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2907 &find_entry
, INSERT
);
2910 lh_cu
->v
.quick
->file_names
= *slot
;
2914 lh
= dwarf_decode_line_header (line_offset
, cu
);
2918 lh_cu
->v
.quick
->no_file_data
= 1;
2922 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2923 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2924 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2925 gdb_assert (slot
!= NULL
);
2928 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2930 qfn
->num_file_names
= lh
->num_file_names
;
2931 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2932 lh
->num_file_names
* sizeof (char *));
2933 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2934 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2935 qfn
->real_names
= NULL
;
2937 free_line_header (lh
);
2939 lh_cu
->v
.quick
->file_names
= qfn
;
2942 /* A helper for the "quick" functions which attempts to read the line
2943 table for THIS_CU. */
2945 static struct quick_file_names
*
2946 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
2948 /* This should never be called for TUs. */
2949 gdb_assert (! this_cu
->is_debug_types
);
2950 /* Nor type unit groups. */
2951 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
2953 if (this_cu
->v
.quick
->file_names
!= NULL
)
2954 return this_cu
->v
.quick
->file_names
;
2955 /* If we know there is no line data, no point in looking again. */
2956 if (this_cu
->v
.quick
->no_file_data
)
2959 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2961 if (this_cu
->v
.quick
->no_file_data
)
2963 return this_cu
->v
.quick
->file_names
;
2966 /* A helper for the "quick" functions which computes and caches the
2967 real path for a given file name from the line table. */
2970 dw2_get_real_path (struct objfile
*objfile
,
2971 struct quick_file_names
*qfn
, int index
)
2973 if (qfn
->real_names
== NULL
)
2974 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2975 qfn
->num_file_names
, sizeof (char *));
2977 if (qfn
->real_names
[index
] == NULL
)
2978 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2980 return qfn
->real_names
[index
];
2983 static struct symtab
*
2984 dw2_find_last_source_symtab (struct objfile
*objfile
)
2988 dw2_setup (objfile
);
2989 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2990 return dw2_instantiate_symtab (dw2_get_cu (index
));
2993 /* Traversal function for dw2_forget_cached_source_info. */
2996 dw2_free_cached_file_names (void **slot
, void *info
)
2998 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3000 if (file_data
->real_names
)
3004 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3006 xfree ((void*) file_data
->real_names
[i
]);
3007 file_data
->real_names
[i
] = NULL
;
3015 dw2_forget_cached_source_info (struct objfile
*objfile
)
3017 dw2_setup (objfile
);
3019 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3020 dw2_free_cached_file_names
, NULL
);
3023 /* Helper function for dw2_map_symtabs_matching_filename that expands
3024 the symtabs and calls the iterator. */
3027 dw2_map_expand_apply (struct objfile
*objfile
,
3028 struct dwarf2_per_cu_data
*per_cu
,
3029 const char *name
, const char *real_path
,
3030 int (*callback
) (struct symtab
*, void *),
3033 struct symtab
*last_made
= objfile
->symtabs
;
3035 /* Don't visit already-expanded CUs. */
3036 if (per_cu
->v
.quick
->symtab
)
3039 /* This may expand more than one symtab, and we want to iterate over
3041 dw2_instantiate_symtab (per_cu
);
3043 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3044 objfile
->symtabs
, last_made
);
3047 /* Implementation of the map_symtabs_matching_filename method. */
3050 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3051 const char *real_path
,
3052 int (*callback
) (struct symtab
*, void *),
3056 const char *name_basename
= lbasename (name
);
3058 dw2_setup (objfile
);
3060 /* The rule is CUs specify all the files, including those used by
3061 any TU, so there's no need to scan TUs here. */
3063 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3066 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3067 struct quick_file_names
*file_data
;
3069 /* We only need to look at symtabs not already expanded. */
3070 if (per_cu
->v
.quick
->symtab
)
3073 file_data
= dw2_get_file_names (per_cu
);
3074 if (file_data
== NULL
)
3077 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3079 const char *this_name
= file_data
->file_names
[j
];
3080 const char *this_real_name
;
3082 if (compare_filenames_for_search (this_name
, name
))
3084 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3090 /* Before we invoke realpath, which can get expensive when many
3091 files are involved, do a quick comparison of the basenames. */
3092 if (! basenames_may_differ
3093 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3096 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3097 if (compare_filenames_for_search (this_real_name
, name
))
3099 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3105 if (real_path
!= NULL
)
3107 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3108 gdb_assert (IS_ABSOLUTE_PATH (name
));
3109 if (this_real_name
!= NULL
3110 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3112 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3124 /* Struct used to manage iterating over all CUs looking for a symbol. */
3126 struct dw2_symtab_iterator
3128 /* The internalized form of .gdb_index. */
3129 struct mapped_index
*index
;
3130 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3131 int want_specific_block
;
3132 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3133 Unused if !WANT_SPECIFIC_BLOCK. */
3135 /* The kind of symbol we're looking for. */
3137 /* The list of CUs from the index entry of the symbol,
3138 or NULL if not found. */
3140 /* The next element in VEC to look at. */
3142 /* The number of elements in VEC, or zero if there is no match. */
3146 /* Initialize the index symtab iterator ITER.
3147 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3148 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3151 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3152 struct mapped_index
*index
,
3153 int want_specific_block
,
3158 iter
->index
= index
;
3159 iter
->want_specific_block
= want_specific_block
;
3160 iter
->block_index
= block_index
;
3161 iter
->domain
= domain
;
3164 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3165 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3173 /* Return the next matching CU or NULL if there are no more. */
3175 static struct dwarf2_per_cu_data
*
3176 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3178 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3180 offset_type cu_index_and_attrs
=
3181 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3182 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3183 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3184 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3185 /* This value is only valid for index versions >= 7. */
3186 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3187 gdb_index_symbol_kind symbol_kind
=
3188 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3189 /* Only check the symbol attributes if they're present.
3190 Indices prior to version 7 don't record them,
3191 and indices >= 7 may elide them for certain symbols
3192 (gold does this). */
3194 (iter
->index
->version
>= 7
3195 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3197 /* Skip if already read in. */
3198 if (per_cu
->v
.quick
->symtab
)
3202 && iter
->want_specific_block
3203 && want_static
!= is_static
)
3206 /* Only check the symbol's kind if it has one. */
3209 switch (iter
->domain
)
3212 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3213 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3214 /* Some types are also in VAR_DOMAIN. */
3215 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3219 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3223 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3238 static struct symtab
*
3239 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3240 const char *name
, domain_enum domain
)
3242 struct symtab
*stab_best
= NULL
;
3243 struct mapped_index
*index
;
3245 dw2_setup (objfile
);
3247 index
= dwarf2_per_objfile
->index_table
;
3249 /* index is NULL if OBJF_READNOW. */
3252 struct dw2_symtab_iterator iter
;
3253 struct dwarf2_per_cu_data
*per_cu
;
3255 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3257 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3259 struct symbol
*sym
= NULL
;
3260 struct symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3262 /* Some caution must be observed with overloaded functions
3263 and methods, since the index will not contain any overload
3264 information (but NAME might contain it). */
3267 struct blockvector
*bv
= BLOCKVECTOR (stab
);
3268 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3270 sym
= lookup_block_symbol (block
, name
, domain
);
3273 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3275 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3281 /* Keep looking through other CUs. */
3289 dw2_print_stats (struct objfile
*objfile
)
3291 int i
, total
, count
;
3293 dw2_setup (objfile
);
3294 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3296 for (i
= 0; i
< total
; ++i
)
3298 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3300 if (!per_cu
->v
.quick
->symtab
)
3303 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3304 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3308 dw2_dump (struct objfile
*objfile
)
3310 /* Nothing worth printing. */
3314 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3315 struct section_offsets
*delta
)
3317 /* There's nothing to relocate here. */
3321 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3322 const char *func_name
)
3324 struct mapped_index
*index
;
3326 dw2_setup (objfile
);
3328 index
= dwarf2_per_objfile
->index_table
;
3330 /* index is NULL if OBJF_READNOW. */
3333 struct dw2_symtab_iterator iter
;
3334 struct dwarf2_per_cu_data
*per_cu
;
3336 /* Note: It doesn't matter what we pass for block_index here. */
3337 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3340 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3341 dw2_instantiate_symtab (per_cu
);
3346 dw2_expand_all_symtabs (struct objfile
*objfile
)
3350 dw2_setup (objfile
);
3352 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3353 + dwarf2_per_objfile
->n_type_units
); ++i
)
3355 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3357 dw2_instantiate_symtab (per_cu
);
3362 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3363 const char *fullname
)
3367 dw2_setup (objfile
);
3369 /* We don't need to consider type units here.
3370 This is only called for examining code, e.g. expand_line_sal.
3371 There can be an order of magnitude (or more) more type units
3372 than comp units, and we avoid them if we can. */
3374 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3377 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3378 struct quick_file_names
*file_data
;
3380 /* We only need to look at symtabs not already expanded. */
3381 if (per_cu
->v
.quick
->symtab
)
3384 file_data
= dw2_get_file_names (per_cu
);
3385 if (file_data
== NULL
)
3388 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3390 const char *this_fullname
= file_data
->file_names
[j
];
3392 if (filename_cmp (this_fullname
, fullname
) == 0)
3394 dw2_instantiate_symtab (per_cu
);
3401 /* A helper function for dw2_find_symbol_file that finds the primary
3402 file name for a given CU. This is a die_reader_func. */
3405 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3406 const gdb_byte
*info_ptr
,
3407 struct die_info
*comp_unit_die
,
3411 const char **result_ptr
= data
;
3412 struct dwarf2_cu
*cu
= reader
->cu
;
3413 struct attribute
*attr
;
3415 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3419 *result_ptr
= DW_STRING (attr
);
3423 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3425 struct dwarf2_per_cu_data
*per_cu
;
3427 const char *filename
;
3429 dw2_setup (objfile
);
3431 /* index_table is NULL if OBJF_READNOW. */
3432 if (!dwarf2_per_objfile
->index_table
)
3436 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3438 struct blockvector
*bv
= BLOCKVECTOR (s
);
3439 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3440 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3444 /* Only file extension of returned filename is recognized. */
3445 return SYMBOL_SYMTAB (sym
)->filename
;
3451 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3455 /* Note that this just looks at the very first one named NAME -- but
3456 actually we are looking for a function. find_main_filename
3457 should be rewritten so that it doesn't require a custom hook. It
3458 could just use the ordinary symbol tables. */
3459 /* vec[0] is the length, which must always be >0. */
3460 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3462 if (per_cu
->v
.quick
->symtab
!= NULL
)
3464 /* Only file extension of returned filename is recognized. */
3465 return per_cu
->v
.quick
->symtab
->filename
;
3468 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3469 dw2_get_primary_filename_reader
, &filename
);
3471 /* Only file extension of returned filename is recognized. */
3476 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3477 struct objfile
*objfile
, int global
,
3478 int (*callback
) (struct block
*,
3479 struct symbol
*, void *),
3480 void *data
, symbol_compare_ftype
*match
,
3481 symbol_compare_ftype
*ordered_compare
)
3483 /* Currently unimplemented; used for Ada. The function can be called if the
3484 current language is Ada for a non-Ada objfile using GNU index. As Ada
3485 does not look for non-Ada symbols this function should just return. */
3489 dw2_expand_symtabs_matching
3490 (struct objfile
*objfile
,
3491 int (*file_matcher
) (const char *, void *, int basenames
),
3492 int (*name_matcher
) (const char *, void *),
3493 enum search_domain kind
,
3498 struct mapped_index
*index
;
3500 dw2_setup (objfile
);
3502 /* index_table is NULL if OBJF_READNOW. */
3503 if (!dwarf2_per_objfile
->index_table
)
3505 index
= dwarf2_per_objfile
->index_table
;
3507 if (file_matcher
!= NULL
)
3509 struct cleanup
*cleanup
;
3510 htab_t visited_found
, visited_not_found
;
3512 visited_found
= htab_create_alloc (10,
3513 htab_hash_pointer
, htab_eq_pointer
,
3514 NULL
, xcalloc
, xfree
);
3515 cleanup
= make_cleanup_htab_delete (visited_found
);
3516 visited_not_found
= htab_create_alloc (10,
3517 htab_hash_pointer
, htab_eq_pointer
,
3518 NULL
, xcalloc
, xfree
);
3519 make_cleanup_htab_delete (visited_not_found
);
3521 /* The rule is CUs specify all the files, including those used by
3522 any TU, so there's no need to scan TUs here. */
3524 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3527 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3528 struct quick_file_names
*file_data
;
3531 per_cu
->v
.quick
->mark
= 0;
3533 /* We only need to look at symtabs not already expanded. */
3534 if (per_cu
->v
.quick
->symtab
)
3537 file_data
= dw2_get_file_names (per_cu
);
3538 if (file_data
== NULL
)
3541 if (htab_find (visited_not_found
, file_data
) != NULL
)
3543 else if (htab_find (visited_found
, file_data
) != NULL
)
3545 per_cu
->v
.quick
->mark
= 1;
3549 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3551 const char *this_real_name
;
3553 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3555 per_cu
->v
.quick
->mark
= 1;
3559 /* Before we invoke realpath, which can get expensive when many
3560 files are involved, do a quick comparison of the basenames. */
3561 if (!basenames_may_differ
3562 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3566 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3567 if (file_matcher (this_real_name
, data
, 0))
3569 per_cu
->v
.quick
->mark
= 1;
3574 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3576 : visited_not_found
,
3581 do_cleanups (cleanup
);
3584 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3586 offset_type idx
= 2 * iter
;
3588 offset_type
*vec
, vec_len
, vec_idx
;
3590 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3593 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3595 if (! (*name_matcher
) (name
, data
))
3598 /* The name was matched, now expand corresponding CUs that were
3600 vec
= (offset_type
*) (index
->constant_pool
3601 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3602 vec_len
= MAYBE_SWAP (vec
[0]);
3603 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3605 struct dwarf2_per_cu_data
*per_cu
;
3606 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3607 gdb_index_symbol_kind symbol_kind
=
3608 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3609 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3611 /* Don't crash on bad data. */
3612 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3613 + dwarf2_per_objfile
->n_type_units
))
3616 /* Only check the symbol's kind if it has one.
3617 Indices prior to version 7 don't record it. */
3618 if (index
->version
>= 7)
3622 case VARIABLES_DOMAIN
:
3623 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3626 case FUNCTIONS_DOMAIN
:
3627 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3631 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3639 per_cu
= dw2_get_cu (cu_index
);
3640 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3641 dw2_instantiate_symtab (per_cu
);
3646 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3649 static struct symtab
*
3650 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3654 if (BLOCKVECTOR (symtab
) != NULL
3655 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3658 if (symtab
->includes
== NULL
)
3661 for (i
= 0; symtab
->includes
[i
]; ++i
)
3663 struct symtab
*s
= symtab
->includes
[i
];
3665 s
= recursively_find_pc_sect_symtab (s
, pc
);
3673 static struct symtab
*
3674 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3675 struct minimal_symbol
*msymbol
,
3677 struct obj_section
*section
,
3680 struct dwarf2_per_cu_data
*data
;
3681 struct symtab
*result
;
3683 dw2_setup (objfile
);
3685 if (!objfile
->psymtabs_addrmap
)
3688 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3692 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3693 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3694 paddress (get_objfile_arch (objfile
), pc
));
3696 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3697 gdb_assert (result
!= NULL
);
3702 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3703 void *data
, int need_fullname
)
3706 struct cleanup
*cleanup
;
3707 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3708 NULL
, xcalloc
, xfree
);
3710 cleanup
= make_cleanup_htab_delete (visited
);
3711 dw2_setup (objfile
);
3713 /* The rule is CUs specify all the files, including those used by
3714 any TU, so there's no need to scan TUs here.
3715 We can ignore file names coming from already-expanded CUs. */
3717 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3719 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3721 if (per_cu
->v
.quick
->symtab
)
3723 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3726 *slot
= per_cu
->v
.quick
->file_names
;
3730 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3733 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3734 struct quick_file_names
*file_data
;
3737 /* We only need to look at symtabs not already expanded. */
3738 if (per_cu
->v
.quick
->symtab
)
3741 file_data
= dw2_get_file_names (per_cu
);
3742 if (file_data
== NULL
)
3745 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3748 /* Already visited. */
3753 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3755 const char *this_real_name
;
3758 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3760 this_real_name
= NULL
;
3761 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3765 do_cleanups (cleanup
);
3769 dw2_has_symbols (struct objfile
*objfile
)
3774 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3777 dw2_find_last_source_symtab
,
3778 dw2_forget_cached_source_info
,
3779 dw2_map_symtabs_matching_filename
,
3784 dw2_expand_symtabs_for_function
,
3785 dw2_expand_all_symtabs
,
3786 dw2_expand_symtabs_with_fullname
,
3787 dw2_find_symbol_file
,
3788 dw2_map_matching_symbols
,
3789 dw2_expand_symtabs_matching
,
3790 dw2_find_pc_sect_symtab
,
3791 dw2_map_symbol_filenames
3794 /* Initialize for reading DWARF for this objfile. Return 0 if this
3795 file will use psymtabs, or 1 if using the GNU index. */
3798 dwarf2_initialize_objfile (struct objfile
*objfile
)
3800 /* If we're about to read full symbols, don't bother with the
3801 indices. In this case we also don't care if some other debug
3802 format is making psymtabs, because they are all about to be
3804 if ((objfile
->flags
& OBJF_READNOW
))
3808 dwarf2_per_objfile
->using_index
= 1;
3809 create_all_comp_units (objfile
);
3810 create_all_type_units (objfile
);
3811 dwarf2_per_objfile
->quick_file_names_table
=
3812 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3814 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3815 + dwarf2_per_objfile
->n_type_units
); ++i
)
3817 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3819 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3820 struct dwarf2_per_cu_quick_data
);
3823 /* Return 1 so that gdb sees the "quick" functions. However,
3824 these functions will be no-ops because we will have expanded
3829 if (dwarf2_read_index (objfile
))
3837 /* Build a partial symbol table. */
3840 dwarf2_build_psymtabs (struct objfile
*objfile
)
3842 volatile struct gdb_exception except
;
3844 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3846 init_psymbol_list (objfile
, 1024);
3849 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3851 /* This isn't really ideal: all the data we allocate on the
3852 objfile's obstack is still uselessly kept around. However,
3853 freeing it seems unsafe. */
3854 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
3856 dwarf2_build_psymtabs_hard (objfile
);
3857 discard_cleanups (cleanups
);
3859 if (except
.reason
< 0)
3860 exception_print (gdb_stderr
, except
);
3863 /* Return the total length of the CU described by HEADER. */
3866 get_cu_length (const struct comp_unit_head
*header
)
3868 return header
->initial_length_size
+ header
->length
;
3871 /* Return TRUE if OFFSET is within CU_HEADER. */
3874 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3876 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3877 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3879 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3882 /* Find the base address of the compilation unit for range lists and
3883 location lists. It will normally be specified by DW_AT_low_pc.
3884 In DWARF-3 draft 4, the base address could be overridden by
3885 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3886 compilation units with discontinuous ranges. */
3889 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3891 struct attribute
*attr
;
3894 cu
->base_address
= 0;
3896 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3899 cu
->base_address
= DW_ADDR (attr
);
3904 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3907 cu
->base_address
= DW_ADDR (attr
);
3913 /* Read in the comp unit header information from the debug_info at info_ptr.
3914 NOTE: This leaves members offset, first_die_offset to be filled in
3917 static const gdb_byte
*
3918 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3919 const gdb_byte
*info_ptr
, bfd
*abfd
)
3922 unsigned int bytes_read
;
3924 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3925 cu_header
->initial_length_size
= bytes_read
;
3926 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3927 info_ptr
+= bytes_read
;
3928 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3930 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3932 info_ptr
+= bytes_read
;
3933 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3935 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3936 if (signed_addr
< 0)
3937 internal_error (__FILE__
, __LINE__
,
3938 _("read_comp_unit_head: dwarf from non elf file"));
3939 cu_header
->signed_addr_p
= signed_addr
;
3944 /* Helper function that returns the proper abbrev section for
3947 static struct dwarf2_section_info
*
3948 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3950 struct dwarf2_section_info
*abbrev
;
3952 if (this_cu
->is_dwz
)
3953 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3955 abbrev
= &dwarf2_per_objfile
->abbrev
;
3960 /* Subroutine of read_and_check_comp_unit_head and
3961 read_and_check_type_unit_head to simplify them.
3962 Perform various error checking on the header. */
3965 error_check_comp_unit_head (struct comp_unit_head
*header
,
3966 struct dwarf2_section_info
*section
,
3967 struct dwarf2_section_info
*abbrev_section
)
3969 bfd
*abfd
= section
->asection
->owner
;
3970 const char *filename
= bfd_get_filename (abfd
);
3972 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3973 error (_("Dwarf Error: wrong version in compilation unit header "
3974 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3977 if (header
->abbrev_offset
.sect_off
3978 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3979 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3980 "(offset 0x%lx + 6) [in module %s]"),
3981 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3984 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3985 avoid potential 32-bit overflow. */
3986 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3988 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3989 "(offset 0x%lx + 0) [in module %s]"),
3990 (long) header
->length
, (long) header
->offset
.sect_off
,
3994 /* Read in a CU/TU header and perform some basic error checking.
3995 The contents of the header are stored in HEADER.
3996 The result is a pointer to the start of the first DIE. */
3998 static const gdb_byte
*
3999 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4000 struct dwarf2_section_info
*section
,
4001 struct dwarf2_section_info
*abbrev_section
,
4002 const gdb_byte
*info_ptr
,
4003 int is_debug_types_section
)
4005 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4006 bfd
*abfd
= section
->asection
->owner
;
4008 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4010 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4012 /* If we're reading a type unit, skip over the signature and
4013 type_offset fields. */
4014 if (is_debug_types_section
)
4015 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4017 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4019 error_check_comp_unit_head (header
, section
, abbrev_section
);
4024 /* Read in the types comp unit header information from .debug_types entry at
4025 types_ptr. The result is a pointer to one past the end of the header. */
4027 static const gdb_byte
*
4028 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4029 struct dwarf2_section_info
*section
,
4030 struct dwarf2_section_info
*abbrev_section
,
4031 const gdb_byte
*info_ptr
,
4032 ULONGEST
*signature
,
4033 cu_offset
*type_offset_in_tu
)
4035 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4036 bfd
*abfd
= section
->asection
->owner
;
4038 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4040 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4042 /* If we're reading a type unit, skip over the signature and
4043 type_offset fields. */
4044 if (signature
!= NULL
)
4045 *signature
= read_8_bytes (abfd
, info_ptr
);
4047 if (type_offset_in_tu
!= NULL
)
4048 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4049 header
->offset_size
);
4050 info_ptr
+= header
->offset_size
;
4052 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4054 error_check_comp_unit_head (header
, section
, abbrev_section
);
4059 /* Fetch the abbreviation table offset from a comp or type unit header. */
4062 read_abbrev_offset (struct dwarf2_section_info
*section
,
4065 bfd
*abfd
= section
->asection
->owner
;
4066 const gdb_byte
*info_ptr
;
4067 unsigned int length
, initial_length_size
, offset_size
;
4068 sect_offset abbrev_offset
;
4070 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4071 info_ptr
= section
->buffer
+ offset
.sect_off
;
4072 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4073 offset_size
= initial_length_size
== 4 ? 4 : 8;
4074 info_ptr
+= initial_length_size
+ 2 /*version*/;
4075 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4076 return abbrev_offset
;
4079 /* Allocate a new partial symtab for file named NAME and mark this new
4080 partial symtab as being an include of PST. */
4083 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4084 struct objfile
*objfile
)
4086 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4088 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4090 /* It shares objfile->objfile_obstack. */
4091 subpst
->dirname
= pst
->dirname
;
4094 subpst
->section_offsets
= pst
->section_offsets
;
4095 subpst
->textlow
= 0;
4096 subpst
->texthigh
= 0;
4098 subpst
->dependencies
= (struct partial_symtab
**)
4099 obstack_alloc (&objfile
->objfile_obstack
,
4100 sizeof (struct partial_symtab
*));
4101 subpst
->dependencies
[0] = pst
;
4102 subpst
->number_of_dependencies
= 1;
4104 subpst
->globals_offset
= 0;
4105 subpst
->n_global_syms
= 0;
4106 subpst
->statics_offset
= 0;
4107 subpst
->n_static_syms
= 0;
4108 subpst
->symtab
= NULL
;
4109 subpst
->read_symtab
= pst
->read_symtab
;
4112 /* No private part is necessary for include psymtabs. This property
4113 can be used to differentiate between such include psymtabs and
4114 the regular ones. */
4115 subpst
->read_symtab_private
= NULL
;
4118 /* Read the Line Number Program data and extract the list of files
4119 included by the source file represented by PST. Build an include
4120 partial symtab for each of these included files. */
4123 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4124 struct die_info
*die
,
4125 struct partial_symtab
*pst
)
4127 struct line_header
*lh
= NULL
;
4128 struct attribute
*attr
;
4130 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4132 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4134 return; /* No linetable, so no includes. */
4136 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4137 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4139 free_line_header (lh
);
4143 hash_signatured_type (const void *item
)
4145 const struct signatured_type
*sig_type
= item
;
4147 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4148 return sig_type
->signature
;
4152 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4154 const struct signatured_type
*lhs
= item_lhs
;
4155 const struct signatured_type
*rhs
= item_rhs
;
4157 return lhs
->signature
== rhs
->signature
;
4160 /* Allocate a hash table for signatured types. */
4163 allocate_signatured_type_table (struct objfile
*objfile
)
4165 return htab_create_alloc_ex (41,
4166 hash_signatured_type
,
4169 &objfile
->objfile_obstack
,
4170 hashtab_obstack_allocate
,
4171 dummy_obstack_deallocate
);
4174 /* A helper function to add a signatured type CU to a table. */
4177 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4179 struct signatured_type
*sigt
= *slot
;
4180 struct signatured_type
***datap
= datum
;
4188 /* Create the hash table of all entries in the .debug_types
4189 (or .debug_types.dwo) section(s).
4190 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4191 otherwise it is NULL.
4193 The result is a pointer to the hash table or NULL if there are no types.
4195 Note: This function processes DWO files only, not DWP files. */
4198 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4199 VEC (dwarf2_section_info_def
) *types
)
4201 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4202 htab_t types_htab
= NULL
;
4204 struct dwarf2_section_info
*section
;
4205 struct dwarf2_section_info
*abbrev_section
;
4207 if (VEC_empty (dwarf2_section_info_def
, types
))
4210 abbrev_section
= (dwo_file
!= NULL
4211 ? &dwo_file
->sections
.abbrev
4212 : &dwarf2_per_objfile
->abbrev
);
4214 if (dwarf2_read_debug
)
4215 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4216 dwo_file
? ".dwo" : "",
4217 bfd_get_filename (abbrev_section
->asection
->owner
));
4220 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4224 const gdb_byte
*info_ptr
, *end_ptr
;
4225 struct dwarf2_section_info
*abbrev_section
;
4227 dwarf2_read_section (objfile
, section
);
4228 info_ptr
= section
->buffer
;
4230 if (info_ptr
== NULL
)
4233 /* We can't set abfd until now because the section may be empty or
4234 not present, in which case section->asection will be NULL. */
4235 abfd
= section
->asection
->owner
;
4238 abbrev_section
= &dwo_file
->sections
.abbrev
;
4240 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4242 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4243 because we don't need to read any dies: the signature is in the
4246 end_ptr
= info_ptr
+ section
->size
;
4247 while (info_ptr
< end_ptr
)
4250 cu_offset type_offset_in_tu
;
4252 struct signatured_type
*sig_type
;
4253 struct dwo_unit
*dwo_tu
;
4255 const gdb_byte
*ptr
= info_ptr
;
4256 struct comp_unit_head header
;
4257 unsigned int length
;
4259 offset
.sect_off
= ptr
- section
->buffer
;
4261 /* We need to read the type's signature in order to build the hash
4262 table, but we don't need anything else just yet. */
4264 ptr
= read_and_check_type_unit_head (&header
, section
,
4265 abbrev_section
, ptr
,
4266 &signature
, &type_offset_in_tu
);
4268 length
= get_cu_length (&header
);
4270 /* Skip dummy type units. */
4271 if (ptr
>= info_ptr
+ length
4272 || peek_abbrev_code (abfd
, ptr
) == 0)
4278 if (types_htab
== NULL
)
4281 types_htab
= allocate_dwo_unit_table (objfile
);
4283 types_htab
= allocate_signatured_type_table (objfile
);
4289 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4291 dwo_tu
->dwo_file
= dwo_file
;
4292 dwo_tu
->signature
= signature
;
4293 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4294 dwo_tu
->section
= section
;
4295 dwo_tu
->offset
= offset
;
4296 dwo_tu
->length
= length
;
4300 /* N.B.: type_offset is not usable if this type uses a DWO file.
4301 The real type_offset is in the DWO file. */
4303 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4304 struct signatured_type
);
4305 sig_type
->signature
= signature
;
4306 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4307 sig_type
->per_cu
.objfile
= objfile
;
4308 sig_type
->per_cu
.is_debug_types
= 1;
4309 sig_type
->per_cu
.section
= section
;
4310 sig_type
->per_cu
.offset
= offset
;
4311 sig_type
->per_cu
.length
= length
;
4314 slot
= htab_find_slot (types_htab
,
4315 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4317 gdb_assert (slot
!= NULL
);
4320 sect_offset dup_offset
;
4324 const struct dwo_unit
*dup_tu
= *slot
;
4326 dup_offset
= dup_tu
->offset
;
4330 const struct signatured_type
*dup_tu
= *slot
;
4332 dup_offset
= dup_tu
->per_cu
.offset
;
4335 complaint (&symfile_complaints
,
4336 _("debug type entry at offset 0x%x is duplicate to"
4337 " the entry at offset 0x%x, signature %s"),
4338 offset
.sect_off
, dup_offset
.sect_off
,
4339 hex_string (signature
));
4341 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4343 if (dwarf2_read_debug
)
4344 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4346 hex_string (signature
));
4355 /* Create the hash table of all entries in the .debug_types section,
4356 and initialize all_type_units.
4357 The result is zero if there is an error (e.g. missing .debug_types section),
4358 otherwise non-zero. */
4361 create_all_type_units (struct objfile
*objfile
)
4364 struct signatured_type
**iter
;
4366 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4367 if (types_htab
== NULL
)
4369 dwarf2_per_objfile
->signatured_types
= NULL
;
4373 dwarf2_per_objfile
->signatured_types
= types_htab
;
4375 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4376 dwarf2_per_objfile
->all_type_units
4377 = obstack_alloc (&objfile
->objfile_obstack
,
4378 dwarf2_per_objfile
->n_type_units
4379 * sizeof (struct signatured_type
*));
4380 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4381 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4382 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4383 == dwarf2_per_objfile
->n_type_units
);
4388 /* Lookup a signature based type for DW_FORM_ref_sig8.
4389 Returns NULL if signature SIG is not present in the table.
4390 It is up to the caller to complain about this. */
4392 static struct signatured_type
*
4393 lookup_signatured_type (ULONGEST sig
)
4395 struct signatured_type find_entry
, *entry
;
4397 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4399 find_entry
.signature
= sig
;
4400 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4404 /* Low level DIE reading support. */
4406 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4409 init_cu_die_reader (struct die_reader_specs
*reader
,
4410 struct dwarf2_cu
*cu
,
4411 struct dwarf2_section_info
*section
,
4412 struct dwo_file
*dwo_file
)
4414 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4415 reader
->abfd
= section
->asection
->owner
;
4417 reader
->dwo_file
= dwo_file
;
4418 reader
->die_section
= section
;
4419 reader
->buffer
= section
->buffer
;
4420 reader
->buffer_end
= section
->buffer
+ section
->size
;
4423 /* Subroutine of init_cutu_and_read_dies to simplify it.
4424 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
4425 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
4428 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
4429 from it to the DIE in the DWO. If NULL we are skipping the stub.
4430 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
4431 are filled in with the info of the DIE from the DWO file.
4432 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
4433 provided an abbrev table to use.
4434 The result is non-zero if a valid (non-dummy) DIE was found. */
4437 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
4438 struct dwo_unit
*dwo_unit
,
4439 int abbrev_table_provided
,
4440 struct die_info
*stub_comp_unit_die
,
4441 struct die_reader_specs
*result_reader
,
4442 const gdb_byte
**result_info_ptr
,
4443 struct die_info
**result_comp_unit_die
,
4444 int *result_has_children
)
4446 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4447 struct dwarf2_cu
*cu
= this_cu
->cu
;
4448 struct dwarf2_section_info
*section
;
4450 const gdb_byte
*begin_info_ptr
, *info_ptr
;
4451 const char *comp_dir_string
;
4452 ULONGEST signature
; /* Or dwo_id. */
4453 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4454 int i
,num_extra_attrs
;
4455 struct dwarf2_section_info
*dwo_abbrev_section
;
4456 struct attribute
*attr
;
4457 struct die_info
*comp_unit_die
;
4459 /* These attributes aren't processed until later:
4460 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4461 However, the attribute is found in the stub which we won't have later.
4462 In order to not impose this complication on the rest of the code,
4463 we read them here and copy them to the DWO CU/TU die. */
4471 if (stub_comp_unit_die
!= NULL
)
4473 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4475 if (! this_cu
->is_debug_types
)
4476 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
4477 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
4478 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
4479 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
4480 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
4482 /* There should be a DW_AT_addr_base attribute here (if needed).
4483 We need the value before we can process DW_FORM_GNU_addr_index. */
4485 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4487 cu
->addr_base
= DW_UNSND (attr
);
4489 /* There should be a DW_AT_ranges_base attribute here (if needed).
4490 We need the value before we can process DW_AT_ranges. */
4491 cu
->ranges_base
= 0;
4492 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4494 cu
->ranges_base
= DW_UNSND (attr
);
4497 /* Set up for reading the DWO CU/TU. */
4498 cu
->dwo_unit
= dwo_unit
;
4499 section
= dwo_unit
->section
;
4500 dwarf2_read_section (objfile
, section
);
4501 abfd
= section
->asection
->owner
;
4502 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4503 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4504 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
4506 if (this_cu
->is_debug_types
)
4508 ULONGEST header_signature
;
4509 cu_offset type_offset_in_tu
;
4510 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
4512 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4516 &type_offset_in_tu
);
4517 gdb_assert (sig_type
->signature
== header_signature
);
4518 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4519 /* For DWOs coming from DWP files, we don't know the CU length
4520 nor the type's offset in the TU until now. */
4521 dwo_unit
->length
= get_cu_length (&cu
->header
);
4522 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
4524 /* Establish the type offset that can be used to lookup the type.
4525 For DWO files, we don't know it until now. */
4526 sig_type
->type_offset_in_section
.sect_off
=
4527 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4531 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4534 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4535 /* For DWOs coming from DWP files, we don't know the CU length
4537 dwo_unit
->length
= get_cu_length (&cu
->header
);
4540 /* Replace the CU's original abbrev table with the DWO's.
4541 Reminder: We can't read the abbrev table until we've read the header. */
4542 if (abbrev_table_provided
)
4544 /* Don't free the provided abbrev table, the caller of
4545 init_cutu_and_read_dies owns it. */
4546 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4547 /* Ensure the DWO abbrev table gets freed. */
4548 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4552 dwarf2_free_abbrev_table (cu
);
4553 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4554 /* Leave any existing abbrev table cleanup as is. */
4557 /* Read in the die, but leave space to copy over the attributes
4558 from the stub. This has the benefit of simplifying the rest of
4559 the code - all the work to maintain the illusion of a single
4560 DW_TAG_{compile,type}_unit DIE is done here. */
4561 num_extra_attrs
= ((stmt_list
!= NULL
)
4565 + (comp_dir
!= NULL
));
4566 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
4567 result_has_children
, num_extra_attrs
);
4569 /* Copy over the attributes from the stub to the DIE we just read in. */
4570 comp_unit_die
= *result_comp_unit_die
;
4571 i
= comp_unit_die
->num_attrs
;
4572 if (stmt_list
!= NULL
)
4573 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4575 comp_unit_die
->attrs
[i
++] = *low_pc
;
4576 if (high_pc
!= NULL
)
4577 comp_unit_die
->attrs
[i
++] = *high_pc
;
4579 comp_unit_die
->attrs
[i
++] = *ranges
;
4580 if (comp_dir
!= NULL
)
4581 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4582 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4584 if (dwarf2_die_debug
)
4586 fprintf_unfiltered (gdb_stdlog
,
4587 "Read die from %s@0x%x of %s:\n",
4588 bfd_section_name (abfd
, section
->asection
),
4589 (unsigned) (begin_info_ptr
- section
->buffer
),
4590 bfd_get_filename (abfd
));
4591 dump_die (comp_unit_die
, dwarf2_die_debug
);
4594 /* Skip dummy compilation units. */
4595 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4596 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4599 *result_info_ptr
= info_ptr
;
4603 /* Subroutine of init_cutu_and_read_dies to simplify it.
4604 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
4605 If the specified DWO unit cannot be found an error is thrown. */
4607 static struct dwo_unit
*
4608 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
4609 struct die_info
*comp_unit_die
)
4611 struct dwarf2_cu
*cu
= this_cu
->cu
;
4612 struct attribute
*attr
;
4614 struct dwo_unit
*dwo_unit
;
4615 const char *comp_dir
, *dwo_name
;
4617 /* Yeah, we look dwo_name up again, but it simplifies the code. */
4618 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4619 gdb_assert (attr
!= NULL
);
4620 dwo_name
= DW_STRING (attr
);
4622 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4624 comp_dir
= DW_STRING (attr
);
4626 if (this_cu
->is_debug_types
)
4628 struct signatured_type
*sig_type
;
4630 /* Since this_cu is the first member of struct signatured_type,
4631 we can go from a pointer to one to a pointer to the other. */
4632 sig_type
= (struct signatured_type
*) this_cu
;
4633 signature
= sig_type
->signature
;
4634 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
4638 struct attribute
*attr
;
4640 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4642 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
4644 dwo_name
, this_cu
->objfile
->name
);
4645 signature
= DW_UNSND (attr
);
4646 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
4650 if (dwo_unit
== NULL
)
4652 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4653 " with ID %s [in module %s]"),
4654 this_cu
->offset
.sect_off
, hex_string (signature
),
4655 this_cu
->objfile
->name
);
4661 /* Initialize a CU (or TU) and read its DIEs.
4662 If the CU defers to a DWO file, read the DWO file as well.
4664 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4665 Otherwise the table specified in the comp unit header is read in and used.
4666 This is an optimization for when we already have the abbrev table.
4668 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4669 Otherwise, a new CU is allocated with xmalloc.
4671 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4672 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4674 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4675 linker) then DIE_READER_FUNC will not get called. */
4678 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4679 struct abbrev_table
*abbrev_table
,
4680 int use_existing_cu
, int keep
,
4681 die_reader_func_ftype
*die_reader_func
,
4684 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4685 struct dwarf2_section_info
*section
= this_cu
->section
;
4686 bfd
*abfd
= section
->asection
->owner
;
4687 struct dwarf2_cu
*cu
;
4688 const gdb_byte
*begin_info_ptr
, *info_ptr
;
4689 struct die_reader_specs reader
;
4690 struct die_info
*comp_unit_die
;
4692 struct attribute
*attr
;
4693 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4694 struct signatured_type
*sig_type
= NULL
;
4695 struct dwarf2_section_info
*abbrev_section
;
4696 /* Non-zero if CU currently points to a DWO file and we need to
4697 reread it. When this happens we need to reread the skeleton die
4698 before we can reread the DWO file. */
4699 int rereading_dwo_cu
= 0;
4701 if (dwarf2_die_debug
)
4702 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4703 this_cu
->is_debug_types
? "type" : "comp",
4704 this_cu
->offset
.sect_off
);
4706 if (use_existing_cu
)
4709 cleanups
= make_cleanup (null_cleanup
, NULL
);
4711 /* This is cheap if the section is already read in. */
4712 dwarf2_read_section (objfile
, section
);
4714 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4716 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4718 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4722 /* If this CU is from a DWO file we need to start over, we need to
4723 refetch the attributes from the skeleton CU.
4724 This could be optimized by retrieving those attributes from when we
4725 were here the first time: the previous comp_unit_die was stored in
4726 comp_unit_obstack. But there's no data yet that we need this
4728 if (cu
->dwo_unit
!= NULL
)
4729 rereading_dwo_cu
= 1;
4733 /* If !use_existing_cu, this_cu->cu must be NULL. */
4734 gdb_assert (this_cu
->cu
== NULL
);
4736 cu
= xmalloc (sizeof (*cu
));
4737 init_one_comp_unit (cu
, this_cu
);
4739 /* If an error occurs while loading, release our storage. */
4740 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4743 /* Get the header. */
4744 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4746 /* We already have the header, there's no need to read it in again. */
4747 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4751 if (this_cu
->is_debug_types
)
4754 cu_offset type_offset_in_tu
;
4756 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4757 abbrev_section
, info_ptr
,
4759 &type_offset_in_tu
);
4761 /* Since per_cu is the first member of struct signatured_type,
4762 we can go from a pointer to one to a pointer to the other. */
4763 sig_type
= (struct signatured_type
*) this_cu
;
4764 gdb_assert (sig_type
->signature
== signature
);
4765 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4766 == type_offset_in_tu
.cu_off
);
4767 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4769 /* LENGTH has not been set yet for type units if we're
4770 using .gdb_index. */
4771 this_cu
->length
= get_cu_length (&cu
->header
);
4773 /* Establish the type offset that can be used to lookup the type. */
4774 sig_type
->type_offset_in_section
.sect_off
=
4775 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4779 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4783 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4784 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4788 /* Skip dummy compilation units. */
4789 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4790 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4792 do_cleanups (cleanups
);
4796 /* If we don't have them yet, read the abbrevs for this compilation unit.
4797 And if we need to read them now, make sure they're freed when we're
4798 done. Note that it's important that if the CU had an abbrev table
4799 on entry we don't free it when we're done: Somewhere up the call stack
4800 it may be in use. */
4801 if (abbrev_table
!= NULL
)
4803 gdb_assert (cu
->abbrev_table
== NULL
);
4804 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4805 == abbrev_table
->offset
.sect_off
);
4806 cu
->abbrev_table
= abbrev_table
;
4808 else if (cu
->abbrev_table
== NULL
)
4810 dwarf2_read_abbrevs (cu
, abbrev_section
);
4811 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4813 else if (rereading_dwo_cu
)
4815 dwarf2_free_abbrev_table (cu
);
4816 dwarf2_read_abbrevs (cu
, abbrev_section
);
4819 /* Read the top level CU/TU die. */
4820 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4821 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4823 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
4825 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
4826 DWO CU, that this test will fail (the attribute will not be present). */
4827 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4830 struct dwo_unit
*dwo_unit
;
4831 struct die_info
*dwo_comp_unit_die
;
4834 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4835 " has children (offset 0x%x) [in module %s]"),
4836 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4837 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
4838 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
4839 abbrev_table
!= NULL
,
4842 &dwo_comp_unit_die
, &has_children
) == 0)
4845 do_cleanups (cleanups
);
4848 comp_unit_die
= dwo_comp_unit_die
;
4851 /* All of the above is setup for this call. Yikes. */
4852 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4854 /* Done, clean up. */
4855 if (free_cu_cleanup
!= NULL
)
4859 /* We've successfully allocated this compilation unit. Let our
4860 caller clean it up when finished with it. */
4861 discard_cleanups (free_cu_cleanup
);
4863 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4864 So we have to manually free the abbrev table. */
4865 dwarf2_free_abbrev_table (cu
);
4867 /* Link this CU into read_in_chain. */
4868 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4869 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4872 do_cleanups (free_cu_cleanup
);
4875 do_cleanups (cleanups
);
4878 /* Read CU/TU THIS_CU in section SECTION,
4879 but do not follow DW_AT_GNU_dwo_name if present.
4880 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4881 to have already done the lookup to find the DWO/DWP file).
4883 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4884 THIS_CU->is_debug_types, but nothing else.
4886 We fill in THIS_CU->length.
4888 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4889 linker) then DIE_READER_FUNC will not get called.
4891 THIS_CU->cu is always freed when done.
4892 This is done in order to not leave THIS_CU->cu in a state where we have
4893 to care whether it refers to the "main" CU or the DWO CU. */
4896 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4897 struct dwarf2_section_info
*abbrev_section
,
4898 struct dwo_file
*dwo_file
,
4899 die_reader_func_ftype
*die_reader_func
,
4902 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4903 struct dwarf2_section_info
*section
= this_cu
->section
;
4904 bfd
*abfd
= section
->asection
->owner
;
4905 struct dwarf2_cu cu
;
4906 const gdb_byte
*begin_info_ptr
, *info_ptr
;
4907 struct die_reader_specs reader
;
4908 struct cleanup
*cleanups
;
4909 struct die_info
*comp_unit_die
;
4912 if (dwarf2_die_debug
)
4913 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4914 this_cu
->is_debug_types
? "type" : "comp",
4915 this_cu
->offset
.sect_off
);
4917 gdb_assert (this_cu
->cu
== NULL
);
4919 /* This is cheap if the section is already read in. */
4920 dwarf2_read_section (objfile
, section
);
4922 init_one_comp_unit (&cu
, this_cu
);
4924 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4926 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4927 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4928 abbrev_section
, info_ptr
,
4929 this_cu
->is_debug_types
);
4931 this_cu
->length
= get_cu_length (&cu
.header
);
4933 /* Skip dummy compilation units. */
4934 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4935 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4937 do_cleanups (cleanups
);
4941 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4942 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4944 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4945 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4947 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4949 do_cleanups (cleanups
);
4952 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4953 does not lookup the specified DWO file.
4954 This cannot be used to read DWO files.
4956 THIS_CU->cu is always freed when done.
4957 This is done in order to not leave THIS_CU->cu in a state where we have
4958 to care whether it refers to the "main" CU or the DWO CU.
4959 We can revisit this if the data shows there's a performance issue. */
4962 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4963 die_reader_func_ftype
*die_reader_func
,
4966 init_cutu_and_read_dies_no_follow (this_cu
,
4967 get_abbrev_section_for_cu (this_cu
),
4969 die_reader_func
, data
);
4972 /* Type Unit Groups.
4974 Type Unit Groups are a way to collapse the set of all TUs (type units) into
4975 a more manageable set. The grouping is done by DW_AT_stmt_list entry
4976 so that all types coming from the same compilation (.o file) are grouped
4977 together. A future step could be to put the types in the same symtab as
4978 the CU the types ultimately came from. */
4981 hash_type_unit_group (const void *item
)
4983 const struct type_unit_group
*tu_group
= item
;
4985 return hash_stmt_list_entry (&tu_group
->hash
);
4989 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
4991 const struct type_unit_group
*lhs
= item_lhs
;
4992 const struct type_unit_group
*rhs
= item_rhs
;
4994 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
4997 /* Allocate a hash table for type unit groups. */
5000 allocate_type_unit_groups_table (void)
5002 return htab_create_alloc_ex (3,
5003 hash_type_unit_group
,
5006 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5007 hashtab_obstack_allocate
,
5008 dummy_obstack_deallocate
);
5011 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5012 partial symtabs. We combine several TUs per psymtab to not let the size
5013 of any one psymtab grow too big. */
5014 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5015 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5017 /* Helper routine for get_type_unit_group.
5018 Create the type_unit_group object used to hold one or more TUs. */
5020 static struct type_unit_group
*
5021 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5023 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5024 struct dwarf2_per_cu_data
*per_cu
;
5025 struct type_unit_group
*tu_group
;
5027 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5028 struct type_unit_group
);
5029 per_cu
= &tu_group
->per_cu
;
5030 per_cu
->objfile
= objfile
;
5032 if (dwarf2_per_objfile
->using_index
)
5034 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5035 struct dwarf2_per_cu_quick_data
);
5039 unsigned int line_offset
= line_offset_struct
.sect_off
;
5040 struct partial_symtab
*pst
;
5043 /* Give the symtab a useful name for debug purposes. */
5044 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5045 name
= xstrprintf ("<type_units_%d>",
5046 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5048 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5050 pst
= create_partial_symtab (per_cu
, name
);
5056 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5057 tu_group
->hash
.line_offset
= line_offset_struct
;
5062 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5063 STMT_LIST is a DW_AT_stmt_list attribute. */
5065 static struct type_unit_group
*
5066 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
5068 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5069 struct type_unit_group
*tu_group
;
5071 unsigned int line_offset
;
5072 struct type_unit_group type_unit_group_for_lookup
;
5074 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5076 dwarf2_per_objfile
->type_unit_groups
=
5077 allocate_type_unit_groups_table ();
5080 /* Do we need to create a new group, or can we use an existing one? */
5084 line_offset
= DW_UNSND (stmt_list
);
5085 ++tu_stats
->nr_symtab_sharers
;
5089 /* Ugh, no stmt_list. Rare, but we have to handle it.
5090 We can do various things here like create one group per TU or
5091 spread them over multiple groups to split up the expansion work.
5092 To avoid worst case scenarios (too many groups or too large groups)
5093 we, umm, group them in bunches. */
5094 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5095 | (tu_stats
->nr_stmt_less_type_units
5096 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5097 ++tu_stats
->nr_stmt_less_type_units
;
5100 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5101 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5102 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5103 &type_unit_group_for_lookup
, INSERT
);
5107 gdb_assert (tu_group
!= NULL
);
5111 sect_offset line_offset_struct
;
5113 line_offset_struct
.sect_off
= line_offset
;
5114 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5116 ++tu_stats
->nr_symtabs
;
5122 /* Struct used to sort TUs by their abbreviation table offset. */
5124 struct tu_abbrev_offset
5126 struct signatured_type
*sig_type
;
5127 sect_offset abbrev_offset
;
5130 /* Helper routine for build_type_unit_groups, passed to qsort. */
5133 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5135 const struct tu_abbrev_offset
* const *a
= ap
;
5136 const struct tu_abbrev_offset
* const *b
= bp
;
5137 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5138 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5140 return (aoff
> boff
) - (aoff
< boff
);
5143 /* A helper function to add a type_unit_group to a table. */
5146 add_type_unit_group_to_table (void **slot
, void *datum
)
5148 struct type_unit_group
*tu_group
= *slot
;
5149 struct type_unit_group
***datap
= datum
;
5157 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5158 each one passing FUNC,DATA.
5160 The efficiency is because we sort TUs by the abbrev table they use and
5161 only read each abbrev table once. In one program there are 200K TUs
5162 sharing 8K abbrev tables.
5164 The main purpose of this function is to support building the
5165 dwarf2_per_objfile->type_unit_groups table.
5166 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5167 can collapse the search space by grouping them by stmt_list.
5168 The savings can be significant, in the same program from above the 200K TUs
5169 share 8K stmt_list tables.
5171 FUNC is expected to call get_type_unit_group, which will create the
5172 struct type_unit_group if necessary and add it to
5173 dwarf2_per_objfile->type_unit_groups. */
5176 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5178 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5179 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5180 struct cleanup
*cleanups
;
5181 struct abbrev_table
*abbrev_table
;
5182 sect_offset abbrev_offset
;
5183 struct tu_abbrev_offset
*sorted_by_abbrev
;
5184 struct type_unit_group
**iter
;
5187 /* It's up to the caller to not call us multiple times. */
5188 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5190 if (dwarf2_per_objfile
->n_type_units
== 0)
5193 /* TUs typically share abbrev tables, and there can be way more TUs than
5194 abbrev tables. Sort by abbrev table to reduce the number of times we
5195 read each abbrev table in.
5196 Alternatives are to punt or to maintain a cache of abbrev tables.
5197 This is simpler and efficient enough for now.
5199 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5200 symtab to use). Typically TUs with the same abbrev offset have the same
5201 stmt_list value too so in practice this should work well.
5203 The basic algorithm here is:
5205 sort TUs by abbrev table
5206 for each TU with same abbrev table:
5207 read abbrev table if first user
5208 read TU top level DIE
5209 [IWBN if DWO skeletons had DW_AT_stmt_list]
5212 if (dwarf2_read_debug
)
5213 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5215 /* Sort in a separate table to maintain the order of all_type_units
5216 for .gdb_index: TU indices directly index all_type_units. */
5217 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5218 dwarf2_per_objfile
->n_type_units
);
5219 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5221 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5223 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5224 sorted_by_abbrev
[i
].abbrev_offset
=
5225 read_abbrev_offset (sig_type
->per_cu
.section
,
5226 sig_type
->per_cu
.offset
);
5228 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5229 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5230 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5232 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5233 called any number of times, so we don't reset tu_stats here. */
5235 abbrev_offset
.sect_off
= ~(unsigned) 0;
5236 abbrev_table
= NULL
;
5237 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5239 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5241 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5243 /* Switch to the next abbrev table if necessary. */
5244 if (abbrev_table
== NULL
5245 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5247 if (abbrev_table
!= NULL
)
5249 abbrev_table_free (abbrev_table
);
5250 /* Reset to NULL in case abbrev_table_read_table throws
5251 an error: abbrev_table_free_cleanup will get called. */
5252 abbrev_table
= NULL
;
5254 abbrev_offset
= tu
->abbrev_offset
;
5256 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5258 ++tu_stats
->nr_uniq_abbrev_tables
;
5261 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5265 /* Create a vector of pointers to primary type units to make it easy to
5266 iterate over them and CUs. See dw2_get_primary_cu. */
5267 dwarf2_per_objfile
->n_type_unit_groups
=
5268 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5269 dwarf2_per_objfile
->all_type_unit_groups
=
5270 obstack_alloc (&objfile
->objfile_obstack
,
5271 dwarf2_per_objfile
->n_type_unit_groups
5272 * sizeof (struct type_unit_group
*));
5273 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5274 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5275 add_type_unit_group_to_table
, &iter
);
5276 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5277 == dwarf2_per_objfile
->n_type_unit_groups
);
5279 do_cleanups (cleanups
);
5281 if (dwarf2_read_debug
)
5283 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5284 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5285 dwarf2_per_objfile
->n_type_units
);
5286 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5287 tu_stats
->nr_uniq_abbrev_tables
);
5288 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5289 tu_stats
->nr_symtabs
);
5290 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5291 tu_stats
->nr_symtab_sharers
);
5292 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5293 tu_stats
->nr_stmt_less_type_units
);
5297 /* Partial symbol tables. */
5299 /* Create a psymtab named NAME and assign it to PER_CU.
5301 The caller must fill in the following details:
5302 dirname, textlow, texthigh. */
5304 static struct partial_symtab
*
5305 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5307 struct objfile
*objfile
= per_cu
->objfile
;
5308 struct partial_symtab
*pst
;
5310 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5312 objfile
->global_psymbols
.next
,
5313 objfile
->static_psymbols
.next
);
5315 pst
->psymtabs_addrmap_supported
= 1;
5317 /* This is the glue that links PST into GDB's symbol API. */
5318 pst
->read_symtab_private
= per_cu
;
5319 pst
->read_symtab
= dwarf2_read_symtab
;
5320 per_cu
->v
.psymtab
= pst
;
5325 /* die_reader_func for process_psymtab_comp_unit. */
5328 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5329 const gdb_byte
*info_ptr
,
5330 struct die_info
*comp_unit_die
,
5334 struct dwarf2_cu
*cu
= reader
->cu
;
5335 struct objfile
*objfile
= cu
->objfile
;
5336 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5337 struct attribute
*attr
;
5339 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5340 struct partial_symtab
*pst
;
5342 const char *filename
;
5343 int *want_partial_unit_ptr
= data
;
5345 if (comp_unit_die
->tag
== DW_TAG_partial_unit
5346 && (want_partial_unit_ptr
== NULL
5347 || !*want_partial_unit_ptr
))
5350 gdb_assert (! per_cu
->is_debug_types
);
5352 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5354 cu
->list_in_scope
= &file_symbols
;
5356 /* Allocate a new partial symbol table structure. */
5357 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5358 if (attr
== NULL
|| !DW_STRING (attr
))
5361 filename
= DW_STRING (attr
);
5363 pst
= create_partial_symtab (per_cu
, filename
);
5365 /* This must be done before calling dwarf2_build_include_psymtabs. */
5366 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5368 pst
->dirname
= DW_STRING (attr
);
5370 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5372 dwarf2_find_base_address (comp_unit_die
, cu
);
5374 /* Possibly set the default values of LOWPC and HIGHPC from
5376 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5377 &best_highpc
, cu
, pst
);
5378 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5379 /* Store the contiguous range if it is not empty; it can be empty for
5380 CUs with no code. */
5381 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5382 best_lowpc
+ baseaddr
,
5383 best_highpc
+ baseaddr
- 1, pst
);
5385 /* Check if comp unit has_children.
5386 If so, read the rest of the partial symbols from this comp unit.
5387 If not, there's no more debug_info for this comp unit. */
5390 struct partial_die_info
*first_die
;
5391 CORE_ADDR lowpc
, highpc
;
5393 lowpc
= ((CORE_ADDR
) -1);
5394 highpc
= ((CORE_ADDR
) 0);
5396 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5398 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5401 /* If we didn't find a lowpc, set it to highpc to avoid
5402 complaints from `maint check'. */
5403 if (lowpc
== ((CORE_ADDR
) -1))
5406 /* If the compilation unit didn't have an explicit address range,
5407 then use the information extracted from its child dies. */
5411 best_highpc
= highpc
;
5414 pst
->textlow
= best_lowpc
+ baseaddr
;
5415 pst
->texthigh
= best_highpc
+ baseaddr
;
5417 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5418 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5419 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5420 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5421 sort_pst_symbols (objfile
, pst
);
5423 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
5426 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5427 struct dwarf2_per_cu_data
*iter
;
5429 /* Fill in 'dependencies' here; we fill in 'users' in a
5431 pst
->number_of_dependencies
= len
;
5432 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5433 len
* sizeof (struct symtab
*));
5435 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
5438 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5440 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5443 /* Get the list of files included in the current compilation unit,
5444 and build a psymtab for each of them. */
5445 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
5447 if (dwarf2_read_debug
)
5449 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5451 fprintf_unfiltered (gdb_stdlog
,
5452 "Psymtab for %s unit @0x%x: %s - %s"
5453 ", %d global, %d static syms\n",
5454 per_cu
->is_debug_types
? "type" : "comp",
5455 per_cu
->offset
.sect_off
,
5456 paddress (gdbarch
, pst
->textlow
),
5457 paddress (gdbarch
, pst
->texthigh
),
5458 pst
->n_global_syms
, pst
->n_static_syms
);
5462 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5463 Process compilation unit THIS_CU for a psymtab. */
5466 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5467 int want_partial_unit
)
5469 /* If this compilation unit was already read in, free the
5470 cached copy in order to read it in again. This is
5471 necessary because we skipped some symbols when we first
5472 read in the compilation unit (see load_partial_dies).
5473 This problem could be avoided, but the benefit is unclear. */
5474 if (this_cu
->cu
!= NULL
)
5475 free_one_cached_comp_unit (this_cu
);
5477 gdb_assert (! this_cu
->is_debug_types
);
5478 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
5479 process_psymtab_comp_unit_reader
,
5480 &want_partial_unit
);
5482 /* Age out any secondary CUs. */
5483 age_cached_comp_units ();
5486 /* Reader function for build_type_psymtabs. */
5489 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5490 const gdb_byte
*info_ptr
,
5491 struct die_info
*type_unit_die
,
5495 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5496 struct dwarf2_cu
*cu
= reader
->cu
;
5497 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5498 struct signatured_type
*sig_type
;
5499 struct type_unit_group
*tu_group
;
5500 struct attribute
*attr
;
5501 struct partial_die_info
*first_die
;
5502 CORE_ADDR lowpc
, highpc
;
5503 struct partial_symtab
*pst
;
5505 gdb_assert (data
== NULL
);
5506 gdb_assert (per_cu
->is_debug_types
);
5507 sig_type
= (struct signatured_type
*) per_cu
;
5512 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5513 tu_group
= get_type_unit_group (cu
, attr
);
5515 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
5517 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5518 cu
->list_in_scope
= &file_symbols
;
5519 pst
= create_partial_symtab (per_cu
, "");
5522 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5524 lowpc
= (CORE_ADDR
) -1;
5525 highpc
= (CORE_ADDR
) 0;
5526 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5528 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5529 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5530 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5531 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5532 sort_pst_symbols (objfile
, pst
);
5535 /* Traversal function for build_type_psymtabs. */
5538 build_type_psymtab_dependencies (void **slot
, void *info
)
5540 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5541 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5542 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5543 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5544 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
5545 struct signatured_type
*iter
;
5548 gdb_assert (len
> 0);
5549 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
5551 pst
->number_of_dependencies
= len
;
5552 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5553 len
* sizeof (struct psymtab
*));
5555 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
5558 gdb_assert (iter
->per_cu
.is_debug_types
);
5559 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
5560 iter
->type_unit_group
= tu_group
;
5563 VEC_free (sig_type_ptr
, tu_group
->tus
);
5568 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5569 Build partial symbol tables for the .debug_types comp-units. */
5572 build_type_psymtabs (struct objfile
*objfile
)
5574 if (! create_all_type_units (objfile
))
5577 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5579 /* Now that all TUs have been processed we can fill in the dependencies. */
5580 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5581 build_type_psymtab_dependencies
, NULL
);
5584 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5587 psymtabs_addrmap_cleanup (void *o
)
5589 struct objfile
*objfile
= o
;
5591 objfile
->psymtabs_addrmap
= NULL
;
5594 /* Compute the 'user' field for each psymtab in OBJFILE. */
5597 set_partial_user (struct objfile
*objfile
)
5601 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5603 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5604 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5610 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5612 /* Set the 'user' field only if it is not already set. */
5613 if (pst
->dependencies
[j
]->user
== NULL
)
5614 pst
->dependencies
[j
]->user
= pst
;
5619 /* Build the partial symbol table by doing a quick pass through the
5620 .debug_info and .debug_abbrev sections. */
5623 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5625 struct cleanup
*back_to
, *addrmap_cleanup
;
5626 struct obstack temp_obstack
;
5629 if (dwarf2_read_debug
)
5631 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5635 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5637 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5639 /* Any cached compilation units will be linked by the per-objfile
5640 read_in_chain. Make sure to free them when we're done. */
5641 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5643 build_type_psymtabs (objfile
);
5645 create_all_comp_units (objfile
);
5647 /* Create a temporary address map on a temporary obstack. We later
5648 copy this to the final obstack. */
5649 obstack_init (&temp_obstack
);
5650 make_cleanup_obstack_free (&temp_obstack
);
5651 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5652 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5654 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5656 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5658 process_psymtab_comp_unit (per_cu
, 0);
5661 set_partial_user (objfile
);
5663 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5664 &objfile
->objfile_obstack
);
5665 discard_cleanups (addrmap_cleanup
);
5667 do_cleanups (back_to
);
5669 if (dwarf2_read_debug
)
5670 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5674 /* die_reader_func for load_partial_comp_unit. */
5677 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5678 const gdb_byte
*info_ptr
,
5679 struct die_info
*comp_unit_die
,
5683 struct dwarf2_cu
*cu
= reader
->cu
;
5685 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5687 /* Check if comp unit has_children.
5688 If so, read the rest of the partial symbols from this comp unit.
5689 If not, there's no more debug_info for this comp unit. */
5691 load_partial_dies (reader
, info_ptr
, 0);
5694 /* Load the partial DIEs for a secondary CU into memory.
5695 This is also used when rereading a primary CU with load_all_dies. */
5698 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5700 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5701 load_partial_comp_unit_reader
, NULL
);
5705 read_comp_units_from_section (struct objfile
*objfile
,
5706 struct dwarf2_section_info
*section
,
5707 unsigned int is_dwz
,
5710 struct dwarf2_per_cu_data
***all_comp_units
)
5712 const gdb_byte
*info_ptr
;
5713 bfd
*abfd
= section
->asection
->owner
;
5715 if (dwarf2_read_debug
)
5716 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
5717 section
->asection
->name
, bfd_get_filename (abfd
));
5719 dwarf2_read_section (objfile
, section
);
5721 info_ptr
= section
->buffer
;
5723 while (info_ptr
< section
->buffer
+ section
->size
)
5725 unsigned int length
, initial_length_size
;
5726 struct dwarf2_per_cu_data
*this_cu
;
5729 offset
.sect_off
= info_ptr
- section
->buffer
;
5731 /* Read just enough information to find out where the next
5732 compilation unit is. */
5733 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5735 /* Save the compilation unit for later lookup. */
5736 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5737 sizeof (struct dwarf2_per_cu_data
));
5738 memset (this_cu
, 0, sizeof (*this_cu
));
5739 this_cu
->offset
= offset
;
5740 this_cu
->length
= length
+ initial_length_size
;
5741 this_cu
->is_dwz
= is_dwz
;
5742 this_cu
->objfile
= objfile
;
5743 this_cu
->section
= section
;
5745 if (*n_comp_units
== *n_allocated
)
5748 *all_comp_units
= xrealloc (*all_comp_units
,
5750 * sizeof (struct dwarf2_per_cu_data
*));
5752 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5755 info_ptr
= info_ptr
+ this_cu
->length
;
5759 /* Create a list of all compilation units in OBJFILE.
5760 This is only done for -readnow and building partial symtabs. */
5763 create_all_comp_units (struct objfile
*objfile
)
5767 struct dwarf2_per_cu_data
**all_comp_units
;
5771 all_comp_units
= xmalloc (n_allocated
5772 * sizeof (struct dwarf2_per_cu_data
*));
5774 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5775 &n_allocated
, &n_comp_units
, &all_comp_units
);
5777 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5779 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5781 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5782 &n_allocated
, &n_comp_units
,
5786 dwarf2_per_objfile
->all_comp_units
5787 = obstack_alloc (&objfile
->objfile_obstack
,
5788 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5789 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5790 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5791 xfree (all_comp_units
);
5792 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5795 /* Process all loaded DIEs for compilation unit CU, starting at
5796 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5797 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5798 DW_AT_ranges). If NEED_PC is set, then this function will set
5799 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5800 and record the covered ranges in the addrmap. */
5803 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5804 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5806 struct partial_die_info
*pdi
;
5808 /* Now, march along the PDI's, descending into ones which have
5809 interesting children but skipping the children of the other ones,
5810 until we reach the end of the compilation unit. */
5816 fixup_partial_die (pdi
, cu
);
5818 /* Anonymous namespaces or modules have no name but have interesting
5819 children, so we need to look at them. Ditto for anonymous
5822 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5823 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5824 || pdi
->tag
== DW_TAG_imported_unit
)
5828 case DW_TAG_subprogram
:
5829 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5831 case DW_TAG_constant
:
5832 case DW_TAG_variable
:
5833 case DW_TAG_typedef
:
5834 case DW_TAG_union_type
:
5835 if (!pdi
->is_declaration
)
5837 add_partial_symbol (pdi
, cu
);
5840 case DW_TAG_class_type
:
5841 case DW_TAG_interface_type
:
5842 case DW_TAG_structure_type
:
5843 if (!pdi
->is_declaration
)
5845 add_partial_symbol (pdi
, cu
);
5848 case DW_TAG_enumeration_type
:
5849 if (!pdi
->is_declaration
)
5850 add_partial_enumeration (pdi
, cu
);
5852 case DW_TAG_base_type
:
5853 case DW_TAG_subrange_type
:
5854 /* File scope base type definitions are added to the partial
5856 add_partial_symbol (pdi
, cu
);
5858 case DW_TAG_namespace
:
5859 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5862 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5864 case DW_TAG_imported_unit
:
5866 struct dwarf2_per_cu_data
*per_cu
;
5868 /* For now we don't handle imported units in type units. */
5869 if (cu
->per_cu
->is_debug_types
)
5871 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5872 " supported in type units [in module %s]"),
5876 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5880 /* Go read the partial unit, if needed. */
5881 if (per_cu
->v
.psymtab
== NULL
)
5882 process_psymtab_comp_unit (per_cu
, 1);
5884 VEC_safe_push (dwarf2_per_cu_ptr
,
5885 cu
->per_cu
->imported_symtabs
, per_cu
);
5893 /* If the die has a sibling, skip to the sibling. */
5895 pdi
= pdi
->die_sibling
;
5899 /* Functions used to compute the fully scoped name of a partial DIE.
5901 Normally, this is simple. For C++, the parent DIE's fully scoped
5902 name is concatenated with "::" and the partial DIE's name. For
5903 Java, the same thing occurs except that "." is used instead of "::".
5904 Enumerators are an exception; they use the scope of their parent
5905 enumeration type, i.e. the name of the enumeration type is not
5906 prepended to the enumerator.
5908 There are two complexities. One is DW_AT_specification; in this
5909 case "parent" means the parent of the target of the specification,
5910 instead of the direct parent of the DIE. The other is compilers
5911 which do not emit DW_TAG_namespace; in this case we try to guess
5912 the fully qualified name of structure types from their members'
5913 linkage names. This must be done using the DIE's children rather
5914 than the children of any DW_AT_specification target. We only need
5915 to do this for structures at the top level, i.e. if the target of
5916 any DW_AT_specification (if any; otherwise the DIE itself) does not
5919 /* Compute the scope prefix associated with PDI's parent, in
5920 compilation unit CU. The result will be allocated on CU's
5921 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5922 field. NULL is returned if no prefix is necessary. */
5924 partial_die_parent_scope (struct partial_die_info
*pdi
,
5925 struct dwarf2_cu
*cu
)
5927 const char *grandparent_scope
;
5928 struct partial_die_info
*parent
, *real_pdi
;
5930 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5931 then this means the parent of the specification DIE. */
5934 while (real_pdi
->has_specification
)
5935 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5936 real_pdi
->spec_is_dwz
, cu
);
5938 parent
= real_pdi
->die_parent
;
5942 if (parent
->scope_set
)
5943 return parent
->scope
;
5945 fixup_partial_die (parent
, cu
);
5947 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5949 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5950 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5951 Work around this problem here. */
5952 if (cu
->language
== language_cplus
5953 && parent
->tag
== DW_TAG_namespace
5954 && strcmp (parent
->name
, "::") == 0
5955 && grandparent_scope
== NULL
)
5957 parent
->scope
= NULL
;
5958 parent
->scope_set
= 1;
5962 if (pdi
->tag
== DW_TAG_enumerator
)
5963 /* Enumerators should not get the name of the enumeration as a prefix. */
5964 parent
->scope
= grandparent_scope
;
5965 else if (parent
->tag
== DW_TAG_namespace
5966 || parent
->tag
== DW_TAG_module
5967 || parent
->tag
== DW_TAG_structure_type
5968 || parent
->tag
== DW_TAG_class_type
5969 || parent
->tag
== DW_TAG_interface_type
5970 || parent
->tag
== DW_TAG_union_type
5971 || parent
->tag
== DW_TAG_enumeration_type
)
5973 if (grandparent_scope
== NULL
)
5974 parent
->scope
= parent
->name
;
5976 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5978 parent
->name
, 0, cu
);
5982 /* FIXME drow/2004-04-01: What should we be doing with
5983 function-local names? For partial symbols, we should probably be
5985 complaint (&symfile_complaints
,
5986 _("unhandled containing DIE tag %d for DIE at %d"),
5987 parent
->tag
, pdi
->offset
.sect_off
);
5988 parent
->scope
= grandparent_scope
;
5991 parent
->scope_set
= 1;
5992 return parent
->scope
;
5995 /* Return the fully scoped name associated with PDI, from compilation unit
5996 CU. The result will be allocated with malloc. */
5999 partial_die_full_name (struct partial_die_info
*pdi
,
6000 struct dwarf2_cu
*cu
)
6002 const char *parent_scope
;
6004 /* If this is a template instantiation, we can not work out the
6005 template arguments from partial DIEs. So, unfortunately, we have
6006 to go through the full DIEs. At least any work we do building
6007 types here will be reused if full symbols are loaded later. */
6008 if (pdi
->has_template_arguments
)
6010 fixup_partial_die (pdi
, cu
);
6012 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6014 struct die_info
*die
;
6015 struct attribute attr
;
6016 struct dwarf2_cu
*ref_cu
= cu
;
6018 /* DW_FORM_ref_addr is using section offset. */
6020 attr
.form
= DW_FORM_ref_addr
;
6021 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6022 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6024 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6028 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6029 if (parent_scope
== NULL
)
6032 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6036 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6038 struct objfile
*objfile
= cu
->objfile
;
6040 const char *actual_name
= NULL
;
6042 char *built_actual_name
;
6044 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6046 built_actual_name
= partial_die_full_name (pdi
, cu
);
6047 if (built_actual_name
!= NULL
)
6048 actual_name
= built_actual_name
;
6050 if (actual_name
== NULL
)
6051 actual_name
= pdi
->name
;
6055 case DW_TAG_subprogram
:
6056 if (pdi
->is_external
|| cu
->language
== language_ada
)
6058 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6059 of the global scope. But in Ada, we want to be able to access
6060 nested procedures globally. So all Ada subprograms are stored
6061 in the global scope. */
6062 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6063 mst_text, objfile); */
6064 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6065 built_actual_name
!= NULL
,
6066 VAR_DOMAIN
, LOC_BLOCK
,
6067 &objfile
->global_psymbols
,
6068 0, pdi
->lowpc
+ baseaddr
,
6069 cu
->language
, objfile
);
6073 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
6074 mst_file_text, objfile); */
6075 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6076 built_actual_name
!= NULL
,
6077 VAR_DOMAIN
, LOC_BLOCK
,
6078 &objfile
->static_psymbols
,
6079 0, pdi
->lowpc
+ baseaddr
,
6080 cu
->language
, objfile
);
6083 case DW_TAG_constant
:
6085 struct psymbol_allocation_list
*list
;
6087 if (pdi
->is_external
)
6088 list
= &objfile
->global_psymbols
;
6090 list
= &objfile
->static_psymbols
;
6091 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6092 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6093 list
, 0, 0, cu
->language
, objfile
);
6096 case DW_TAG_variable
:
6098 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6102 && !dwarf2_per_objfile
->has_section_at_zero
)
6104 /* A global or static variable may also have been stripped
6105 out by the linker if unused, in which case its address
6106 will be nullified; do not add such variables into partial
6107 symbol table then. */
6109 else if (pdi
->is_external
)
6112 Don't enter into the minimal symbol tables as there is
6113 a minimal symbol table entry from the ELF symbols already.
6114 Enter into partial symbol table if it has a location
6115 descriptor or a type.
6116 If the location descriptor is missing, new_symbol will create
6117 a LOC_UNRESOLVED symbol, the address of the variable will then
6118 be determined from the minimal symbol table whenever the variable
6120 The address for the partial symbol table entry is not
6121 used by GDB, but it comes in handy for debugging partial symbol
6124 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6125 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6126 built_actual_name
!= NULL
,
6127 VAR_DOMAIN
, LOC_STATIC
,
6128 &objfile
->global_psymbols
,
6130 cu
->language
, objfile
);
6134 /* Static Variable. Skip symbols without location descriptors. */
6135 if (pdi
->d
.locdesc
== NULL
)
6137 xfree (built_actual_name
);
6140 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6141 mst_file_data, objfile); */
6142 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6143 built_actual_name
!= NULL
,
6144 VAR_DOMAIN
, LOC_STATIC
,
6145 &objfile
->static_psymbols
,
6147 cu
->language
, objfile
);
6150 case DW_TAG_typedef
:
6151 case DW_TAG_base_type
:
6152 case DW_TAG_subrange_type
:
6153 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6154 built_actual_name
!= NULL
,
6155 VAR_DOMAIN
, LOC_TYPEDEF
,
6156 &objfile
->static_psymbols
,
6157 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6159 case DW_TAG_namespace
:
6160 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6161 built_actual_name
!= NULL
,
6162 VAR_DOMAIN
, LOC_TYPEDEF
,
6163 &objfile
->global_psymbols
,
6164 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6166 case DW_TAG_class_type
:
6167 case DW_TAG_interface_type
:
6168 case DW_TAG_structure_type
:
6169 case DW_TAG_union_type
:
6170 case DW_TAG_enumeration_type
:
6171 /* Skip external references. The DWARF standard says in the section
6172 about "Structure, Union, and Class Type Entries": "An incomplete
6173 structure, union or class type is represented by a structure,
6174 union or class entry that does not have a byte size attribute
6175 and that has a DW_AT_declaration attribute." */
6176 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6178 xfree (built_actual_name
);
6182 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6183 static vs. global. */
6184 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6185 built_actual_name
!= NULL
,
6186 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6187 (cu
->language
== language_cplus
6188 || cu
->language
== language_java
)
6189 ? &objfile
->global_psymbols
6190 : &objfile
->static_psymbols
,
6191 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6194 case DW_TAG_enumerator
:
6195 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6196 built_actual_name
!= NULL
,
6197 VAR_DOMAIN
, LOC_CONST
,
6198 (cu
->language
== language_cplus
6199 || cu
->language
== language_java
)
6200 ? &objfile
->global_psymbols
6201 : &objfile
->static_psymbols
,
6202 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6208 xfree (built_actual_name
);
6211 /* Read a partial die corresponding to a namespace; also, add a symbol
6212 corresponding to that namespace to the symbol table. NAMESPACE is
6213 the name of the enclosing namespace. */
6216 add_partial_namespace (struct partial_die_info
*pdi
,
6217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6218 int need_pc
, struct dwarf2_cu
*cu
)
6220 /* Add a symbol for the namespace. */
6222 add_partial_symbol (pdi
, cu
);
6224 /* Now scan partial symbols in that namespace. */
6226 if (pdi
->has_children
)
6227 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6230 /* Read a partial die corresponding to a Fortran module. */
6233 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6234 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6236 /* Now scan partial symbols in that module. */
6238 if (pdi
->has_children
)
6239 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6242 /* Read a partial die corresponding to a subprogram and create a partial
6243 symbol for that subprogram. When the CU language allows it, this
6244 routine also defines a partial symbol for each nested subprogram
6245 that this subprogram contains.
6247 DIE my also be a lexical block, in which case we simply search
6248 recursively for suprograms defined inside that lexical block.
6249 Again, this is only performed when the CU language allows this
6250 type of definitions. */
6253 add_partial_subprogram (struct partial_die_info
*pdi
,
6254 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6255 int need_pc
, struct dwarf2_cu
*cu
)
6257 if (pdi
->tag
== DW_TAG_subprogram
)
6259 if (pdi
->has_pc_info
)
6261 if (pdi
->lowpc
< *lowpc
)
6262 *lowpc
= pdi
->lowpc
;
6263 if (pdi
->highpc
> *highpc
)
6264 *highpc
= pdi
->highpc
;
6268 struct objfile
*objfile
= cu
->objfile
;
6270 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6271 SECT_OFF_TEXT (objfile
));
6272 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6273 pdi
->lowpc
+ baseaddr
,
6274 pdi
->highpc
- 1 + baseaddr
,
6275 cu
->per_cu
->v
.psymtab
);
6279 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6281 if (!pdi
->is_declaration
)
6282 /* Ignore subprogram DIEs that do not have a name, they are
6283 illegal. Do not emit a complaint at this point, we will
6284 do so when we convert this psymtab into a symtab. */
6286 add_partial_symbol (pdi
, cu
);
6290 if (! pdi
->has_children
)
6293 if (cu
->language
== language_ada
)
6295 pdi
= pdi
->die_child
;
6298 fixup_partial_die (pdi
, cu
);
6299 if (pdi
->tag
== DW_TAG_subprogram
6300 || pdi
->tag
== DW_TAG_lexical_block
)
6301 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6302 pdi
= pdi
->die_sibling
;
6307 /* Read a partial die corresponding to an enumeration type. */
6310 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6311 struct dwarf2_cu
*cu
)
6313 struct partial_die_info
*pdi
;
6315 if (enum_pdi
->name
!= NULL
)
6316 add_partial_symbol (enum_pdi
, cu
);
6318 pdi
= enum_pdi
->die_child
;
6321 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6322 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6324 add_partial_symbol (pdi
, cu
);
6325 pdi
= pdi
->die_sibling
;
6329 /* Return the initial uleb128 in the die at INFO_PTR. */
6332 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
6334 unsigned int bytes_read
;
6336 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6339 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6340 Return the corresponding abbrev, or NULL if the number is zero (indicating
6341 an empty DIE). In either case *BYTES_READ will be set to the length of
6342 the initial number. */
6344 static struct abbrev_info
*
6345 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6346 struct dwarf2_cu
*cu
)
6348 bfd
*abfd
= cu
->objfile
->obfd
;
6349 unsigned int abbrev_number
;
6350 struct abbrev_info
*abbrev
;
6352 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6354 if (abbrev_number
== 0)
6357 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6360 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6361 abbrev_number
, bfd_get_filename (abfd
));
6367 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6368 Returns a pointer to the end of a series of DIEs, terminated by an empty
6369 DIE. Any children of the skipped DIEs will also be skipped. */
6371 static const gdb_byte
*
6372 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
6374 struct dwarf2_cu
*cu
= reader
->cu
;
6375 struct abbrev_info
*abbrev
;
6376 unsigned int bytes_read
;
6380 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6382 return info_ptr
+ bytes_read
;
6384 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6388 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6389 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6390 abbrev corresponding to that skipped uleb128 should be passed in
6391 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6394 static const gdb_byte
*
6395 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
6396 struct abbrev_info
*abbrev
)
6398 unsigned int bytes_read
;
6399 struct attribute attr
;
6400 bfd
*abfd
= reader
->abfd
;
6401 struct dwarf2_cu
*cu
= reader
->cu
;
6402 const gdb_byte
*buffer
= reader
->buffer
;
6403 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6404 const gdb_byte
*start_info_ptr
= info_ptr
;
6405 unsigned int form
, i
;
6407 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6409 /* The only abbrev we care about is DW_AT_sibling. */
6410 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6412 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6413 if (attr
.form
== DW_FORM_ref_addr
)
6414 complaint (&symfile_complaints
,
6415 _("ignoring absolute DW_AT_sibling"));
6417 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6420 /* If it isn't DW_AT_sibling, skip this attribute. */
6421 form
= abbrev
->attrs
[i
].form
;
6425 case DW_FORM_ref_addr
:
6426 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6427 and later it is offset sized. */
6428 if (cu
->header
.version
== 2)
6429 info_ptr
+= cu
->header
.addr_size
;
6431 info_ptr
+= cu
->header
.offset_size
;
6433 case DW_FORM_GNU_ref_alt
:
6434 info_ptr
+= cu
->header
.offset_size
;
6437 info_ptr
+= cu
->header
.addr_size
;
6444 case DW_FORM_flag_present
:
6456 case DW_FORM_ref_sig8
:
6459 case DW_FORM_string
:
6460 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6461 info_ptr
+= bytes_read
;
6463 case DW_FORM_sec_offset
:
6465 case DW_FORM_GNU_strp_alt
:
6466 info_ptr
+= cu
->header
.offset_size
;
6468 case DW_FORM_exprloc
:
6470 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6471 info_ptr
+= bytes_read
;
6473 case DW_FORM_block1
:
6474 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6476 case DW_FORM_block2
:
6477 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6479 case DW_FORM_block4
:
6480 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6484 case DW_FORM_ref_udata
:
6485 case DW_FORM_GNU_addr_index
:
6486 case DW_FORM_GNU_str_index
:
6487 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
6489 case DW_FORM_indirect
:
6490 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6491 info_ptr
+= bytes_read
;
6492 /* We need to continue parsing from here, so just go back to
6494 goto skip_attribute
;
6497 error (_("Dwarf Error: Cannot handle %s "
6498 "in DWARF reader [in module %s]"),
6499 dwarf_form_name (form
),
6500 bfd_get_filename (abfd
));
6504 if (abbrev
->has_children
)
6505 return skip_children (reader
, info_ptr
);
6510 /* Locate ORIG_PDI's sibling.
6511 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6513 static const gdb_byte
*
6514 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6515 struct partial_die_info
*orig_pdi
,
6516 const gdb_byte
*info_ptr
)
6518 /* Do we know the sibling already? */
6520 if (orig_pdi
->sibling
)
6521 return orig_pdi
->sibling
;
6523 /* Are there any children to deal with? */
6525 if (!orig_pdi
->has_children
)
6528 /* Skip the children the long way. */
6530 return skip_children (reader
, info_ptr
);
6533 /* Expand this partial symbol table into a full symbol table. SELF is
6537 dwarf2_read_symtab (struct partial_symtab
*self
,
6538 struct objfile
*objfile
)
6542 warning (_("bug: psymtab for %s is already read in."),
6549 printf_filtered (_("Reading in symbols for %s..."),
6551 gdb_flush (gdb_stdout
);
6554 /* Restore our global data. */
6555 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
6557 /* If this psymtab is constructed from a debug-only objfile, the
6558 has_section_at_zero flag will not necessarily be correct. We
6559 can get the correct value for this flag by looking at the data
6560 associated with the (presumably stripped) associated objfile. */
6561 if (objfile
->separate_debug_objfile_backlink
)
6563 struct dwarf2_per_objfile
*dpo_backlink
6564 = objfile_data (objfile
->separate_debug_objfile_backlink
,
6565 dwarf2_objfile_data_key
);
6567 dwarf2_per_objfile
->has_section_at_zero
6568 = dpo_backlink
->has_section_at_zero
;
6571 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6573 psymtab_to_symtab_1 (self
);
6575 /* Finish up the debug error message. */
6577 printf_filtered (_("done.\n"));
6580 process_cu_includes ();
6583 /* Reading in full CUs. */
6585 /* Add PER_CU to the queue. */
6588 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6589 enum language pretend_language
)
6591 struct dwarf2_queue_item
*item
;
6594 item
= xmalloc (sizeof (*item
));
6595 item
->per_cu
= per_cu
;
6596 item
->pretend_language
= pretend_language
;
6599 if (dwarf2_queue
== NULL
)
6600 dwarf2_queue
= item
;
6602 dwarf2_queue_tail
->next
= item
;
6604 dwarf2_queue_tail
= item
;
6607 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6608 unit and add it to our queue.
6609 The result is non-zero if PER_CU was queued, otherwise the result is zero
6610 meaning either PER_CU is already queued or it is already loaded. */
6613 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6614 struct dwarf2_per_cu_data
*per_cu
,
6615 enum language pretend_language
)
6617 /* We may arrive here during partial symbol reading, if we need full
6618 DIEs to process an unusual case (e.g. template arguments). Do
6619 not queue PER_CU, just tell our caller to load its DIEs. */
6620 if (dwarf2_per_objfile
->reading_partial_symbols
)
6622 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6627 /* Mark the dependence relation so that we don't flush PER_CU
6629 dwarf2_add_dependence (this_cu
, per_cu
);
6631 /* If it's already on the queue, we have nothing to do. */
6635 /* If the compilation unit is already loaded, just mark it as
6637 if (per_cu
->cu
!= NULL
)
6639 per_cu
->cu
->last_used
= 0;
6643 /* Add it to the queue. */
6644 queue_comp_unit (per_cu
, pretend_language
);
6649 /* Process the queue. */
6652 process_queue (void)
6654 struct dwarf2_queue_item
*item
, *next_item
;
6656 if (dwarf2_read_debug
)
6658 fprintf_unfiltered (gdb_stdlog
,
6659 "Expanding one or more symtabs of objfile %s ...\n",
6660 dwarf2_per_objfile
->objfile
->name
);
6663 /* The queue starts out with one item, but following a DIE reference
6664 may load a new CU, adding it to the end of the queue. */
6665 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6667 if (dwarf2_per_objfile
->using_index
6668 ? !item
->per_cu
->v
.quick
->symtab
6669 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6671 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6673 if (dwarf2_read_debug
)
6675 fprintf_unfiltered (gdb_stdlog
,
6676 "Expanding symtab of %s at offset 0x%x\n",
6677 per_cu
->is_debug_types
? "TU" : "CU",
6678 per_cu
->offset
.sect_off
);
6681 if (per_cu
->is_debug_types
)
6682 process_full_type_unit (per_cu
, item
->pretend_language
);
6684 process_full_comp_unit (per_cu
, item
->pretend_language
);
6686 if (dwarf2_read_debug
)
6688 fprintf_unfiltered (gdb_stdlog
,
6689 "Done expanding %s at offset 0x%x\n",
6690 per_cu
->is_debug_types
? "TU" : "CU",
6691 per_cu
->offset
.sect_off
);
6695 item
->per_cu
->queued
= 0;
6696 next_item
= item
->next
;
6700 dwarf2_queue_tail
= NULL
;
6702 if (dwarf2_read_debug
)
6704 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6705 dwarf2_per_objfile
->objfile
->name
);
6709 /* Free all allocated queue entries. This function only releases anything if
6710 an error was thrown; if the queue was processed then it would have been
6711 freed as we went along. */
6714 dwarf2_release_queue (void *dummy
)
6716 struct dwarf2_queue_item
*item
, *last
;
6718 item
= dwarf2_queue
;
6721 /* Anything still marked queued is likely to be in an
6722 inconsistent state, so discard it. */
6723 if (item
->per_cu
->queued
)
6725 if (item
->per_cu
->cu
!= NULL
)
6726 free_one_cached_comp_unit (item
->per_cu
);
6727 item
->per_cu
->queued
= 0;
6735 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6738 /* Read in full symbols for PST, and anything it depends on. */
6741 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6743 struct dwarf2_per_cu_data
*per_cu
;
6749 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6750 if (!pst
->dependencies
[i
]->readin
6751 && pst
->dependencies
[i
]->user
== NULL
)
6753 /* Inform about additional files that need to be read in. */
6756 /* FIXME: i18n: Need to make this a single string. */
6757 fputs_filtered (" ", gdb_stdout
);
6759 fputs_filtered ("and ", gdb_stdout
);
6761 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6762 wrap_here (""); /* Flush output. */
6763 gdb_flush (gdb_stdout
);
6765 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6768 per_cu
= pst
->read_symtab_private
;
6772 /* It's an include file, no symbols to read for it.
6773 Everything is in the parent symtab. */
6778 dw2_do_instantiate_symtab (per_cu
);
6781 /* Trivial hash function for die_info: the hash value of a DIE
6782 is its offset in .debug_info for this objfile. */
6785 die_hash (const void *item
)
6787 const struct die_info
*die
= item
;
6789 return die
->offset
.sect_off
;
6792 /* Trivial comparison function for die_info structures: two DIEs
6793 are equal if they have the same offset. */
6796 die_eq (const void *item_lhs
, const void *item_rhs
)
6798 const struct die_info
*die_lhs
= item_lhs
;
6799 const struct die_info
*die_rhs
= item_rhs
;
6801 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6804 /* die_reader_func for load_full_comp_unit.
6805 This is identical to read_signatured_type_reader,
6806 but is kept separate for now. */
6809 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6810 const gdb_byte
*info_ptr
,
6811 struct die_info
*comp_unit_die
,
6815 struct dwarf2_cu
*cu
= reader
->cu
;
6816 enum language
*language_ptr
= data
;
6818 gdb_assert (cu
->die_hash
== NULL
);
6820 htab_create_alloc_ex (cu
->header
.length
/ 12,
6824 &cu
->comp_unit_obstack
,
6825 hashtab_obstack_allocate
,
6826 dummy_obstack_deallocate
);
6829 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6830 &info_ptr
, comp_unit_die
);
6831 cu
->dies
= comp_unit_die
;
6832 /* comp_unit_die is not stored in die_hash, no need. */
6834 /* We try not to read any attributes in this function, because not
6835 all CUs needed for references have been loaded yet, and symbol
6836 table processing isn't initialized. But we have to set the CU language,
6837 or we won't be able to build types correctly.
6838 Similarly, if we do not read the producer, we can not apply
6839 producer-specific interpretation. */
6840 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6843 /* Load the DIEs associated with PER_CU into memory. */
6846 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6847 enum language pretend_language
)
6849 gdb_assert (! this_cu
->is_debug_types
);
6851 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6852 load_full_comp_unit_reader
, &pretend_language
);
6855 /* Add a DIE to the delayed physname list. */
6858 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6859 const char *name
, struct die_info
*die
,
6860 struct dwarf2_cu
*cu
)
6862 struct delayed_method_info mi
;
6864 mi
.fnfield_index
= fnfield_index
;
6868 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6871 /* A cleanup for freeing the delayed method list. */
6874 free_delayed_list (void *ptr
)
6876 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6877 if (cu
->method_list
!= NULL
)
6879 VEC_free (delayed_method_info
, cu
->method_list
);
6880 cu
->method_list
= NULL
;
6884 /* Compute the physnames of any methods on the CU's method list.
6886 The computation of method physnames is delayed in order to avoid the
6887 (bad) condition that one of the method's formal parameters is of an as yet
6891 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6894 struct delayed_method_info
*mi
;
6895 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6897 const char *physname
;
6898 struct fn_fieldlist
*fn_flp
6899 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6900 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
6901 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6905 /* Go objects should be embedded in a DW_TAG_module DIE,
6906 and it's not clear if/how imported objects will appear.
6907 To keep Go support simple until that's worked out,
6908 go back through what we've read and create something usable.
6909 We could do this while processing each DIE, and feels kinda cleaner,
6910 but that way is more invasive.
6911 This is to, for example, allow the user to type "p var" or "b main"
6912 without having to specify the package name, and allow lookups
6913 of module.object to work in contexts that use the expression
6917 fixup_go_packaging (struct dwarf2_cu
*cu
)
6919 char *package_name
= NULL
;
6920 struct pending
*list
;
6923 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6925 for (i
= 0; i
< list
->nsyms
; ++i
)
6927 struct symbol
*sym
= list
->symbol
[i
];
6929 if (SYMBOL_LANGUAGE (sym
) == language_go
6930 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6932 char *this_package_name
= go_symbol_package_name (sym
);
6934 if (this_package_name
== NULL
)
6936 if (package_name
== NULL
)
6937 package_name
= this_package_name
;
6940 if (strcmp (package_name
, this_package_name
) != 0)
6941 complaint (&symfile_complaints
,
6942 _("Symtab %s has objects from two different Go packages: %s and %s"),
6943 (SYMBOL_SYMTAB (sym
)
6944 ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym
))
6945 : cu
->objfile
->name
),
6946 this_package_name
, package_name
);
6947 xfree (this_package_name
);
6953 if (package_name
!= NULL
)
6955 struct objfile
*objfile
= cu
->objfile
;
6956 const char *saved_package_name
= obstack_copy0 (&objfile
->objfile_obstack
,
6958 strlen (package_name
));
6959 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6960 saved_package_name
, objfile
);
6963 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6965 sym
= allocate_symbol (objfile
);
6966 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
6967 SYMBOL_SET_NAMES (sym
, saved_package_name
,
6968 strlen (saved_package_name
), 0, objfile
);
6969 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6970 e.g., "main" finds the "main" module and not C's main(). */
6971 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6972 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
6973 SYMBOL_TYPE (sym
) = type
;
6975 add_symbol_to_list (sym
, &global_symbols
);
6977 xfree (package_name
);
6981 /* Return the symtab for PER_CU. This works properly regardless of
6982 whether we're using the index or psymtabs. */
6984 static struct symtab
*
6985 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6987 return (dwarf2_per_objfile
->using_index
6988 ? per_cu
->v
.quick
->symtab
6989 : per_cu
->v
.psymtab
->symtab
);
6992 /* A helper function for computing the list of all symbol tables
6993 included by PER_CU. */
6996 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6997 htab_t all_children
,
6998 struct dwarf2_per_cu_data
*per_cu
)
7002 struct dwarf2_per_cu_data
*iter
;
7004 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7007 /* This inclusion and its children have been processed. */
7012 /* Only add a CU if it has a symbol table. */
7013 if (get_symtab (per_cu
) != NULL
)
7014 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
7017 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7019 recursively_compute_inclusions (result
, all_children
, iter
);
7022 /* Compute the symtab 'includes' fields for the symtab related to
7026 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7028 gdb_assert (! per_cu
->is_debug_types
);
7030 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7033 struct dwarf2_per_cu_data
*iter
;
7034 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
7035 htab_t all_children
;
7036 struct symtab
*symtab
= get_symtab (per_cu
);
7038 /* If we don't have a symtab, we can just skip this case. */
7042 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7043 NULL
, xcalloc
, xfree
);
7046 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7049 recursively_compute_inclusions (&result_children
, all_children
, iter
);
7051 /* Now we have a transitive closure of all the included CUs, and
7052 for .gdb_index version 7 the included TUs, so we can convert it
7053 to a list of symtabs. */
7054 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
7056 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7057 (len
+ 1) * sizeof (struct symtab
*));
7059 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
7061 symtab
->includes
[ix
] = get_symtab (iter
);
7062 symtab
->includes
[len
] = NULL
;
7064 VEC_free (dwarf2_per_cu_ptr
, result_children
);
7065 htab_delete (all_children
);
7069 /* Compute the 'includes' field for the symtabs of all the CUs we just
7073 process_cu_includes (void)
7076 struct dwarf2_per_cu_data
*iter
;
7079 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7083 if (! iter
->is_debug_types
)
7084 compute_symtab_includes (iter
);
7087 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7090 /* Generate full symbol information for PER_CU, whose DIEs have
7091 already been loaded into memory. */
7094 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7095 enum language pretend_language
)
7097 struct dwarf2_cu
*cu
= per_cu
->cu
;
7098 struct objfile
*objfile
= per_cu
->objfile
;
7099 CORE_ADDR lowpc
, highpc
;
7100 struct symtab
*symtab
;
7101 struct cleanup
*back_to
, *delayed_list_cleanup
;
7103 struct block
*static_block
;
7105 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7108 back_to
= make_cleanup (really_free_pendings
, NULL
);
7109 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7111 cu
->list_in_scope
= &file_symbols
;
7113 cu
->language
= pretend_language
;
7114 cu
->language_defn
= language_def (cu
->language
);
7116 /* Do line number decoding in read_file_scope () */
7117 process_die (cu
->dies
, cu
);
7119 /* For now fudge the Go package. */
7120 if (cu
->language
== language_go
)
7121 fixup_go_packaging (cu
);
7123 /* Now that we have processed all the DIEs in the CU, all the types
7124 should be complete, and it should now be safe to compute all of the
7126 compute_delayed_physnames (cu
);
7127 do_cleanups (delayed_list_cleanup
);
7129 /* Some compilers don't define a DW_AT_high_pc attribute for the
7130 compilation unit. If the DW_AT_high_pc is missing, synthesize
7131 it, by scanning the DIE's below the compilation unit. */
7132 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
7135 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
7136 per_cu
->imported_symtabs
!= NULL
);
7138 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7139 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7140 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7141 addrmap to help ensure it has an accurate map of pc values belonging to
7143 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
7145 symtab
= end_symtab_from_static_block (static_block
, objfile
,
7146 SECT_OFF_TEXT (objfile
), 0);
7150 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7152 /* Set symtab language to language from DW_AT_language. If the
7153 compilation is from a C file generated by language preprocessors, do
7154 not set the language if it was already deduced by start_subfile. */
7155 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7156 symtab
->language
= cu
->language
;
7158 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7159 produce DW_AT_location with location lists but it can be possibly
7160 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7161 there were bugs in prologue debug info, fixed later in GCC-4.5
7162 by "unwind info for epilogues" patch (which is not directly related).
7164 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7165 needed, it would be wrong due to missing DW_AT_producer there.
7167 Still one can confuse GDB by using non-standard GCC compilation
7168 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7170 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
7171 symtab
->locations_valid
= 1;
7173 if (gcc_4_minor
>= 5)
7174 symtab
->epilogue_unwind_valid
= 1;
7176 symtab
->call_site_htab
= cu
->call_site_htab
;
7179 if (dwarf2_per_objfile
->using_index
)
7180 per_cu
->v
.quick
->symtab
= symtab
;
7183 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7184 pst
->symtab
= symtab
;
7188 /* Push it for inclusion processing later. */
7189 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
7191 do_cleanups (back_to
);
7194 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7195 already been loaded into memory. */
7198 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
7199 enum language pretend_language
)
7201 struct dwarf2_cu
*cu
= per_cu
->cu
;
7202 struct objfile
*objfile
= per_cu
->objfile
;
7203 struct symtab
*symtab
;
7204 struct cleanup
*back_to
, *delayed_list_cleanup
;
7205 struct signatured_type
*sig_type
;
7207 gdb_assert (per_cu
->is_debug_types
);
7208 sig_type
= (struct signatured_type
*) per_cu
;
7211 back_to
= make_cleanup (really_free_pendings
, NULL
);
7212 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7214 cu
->list_in_scope
= &file_symbols
;
7216 cu
->language
= pretend_language
;
7217 cu
->language_defn
= language_def (cu
->language
);
7219 /* The symbol tables are set up in read_type_unit_scope. */
7220 process_die (cu
->dies
, cu
);
7222 /* For now fudge the Go package. */
7223 if (cu
->language
== language_go
)
7224 fixup_go_packaging (cu
);
7226 /* Now that we have processed all the DIEs in the CU, all the types
7227 should be complete, and it should now be safe to compute all of the
7229 compute_delayed_physnames (cu
);
7230 do_cleanups (delayed_list_cleanup
);
7232 /* TUs share symbol tables.
7233 If this is the first TU to use this symtab, complete the construction
7234 of it with end_expandable_symtab. Otherwise, complete the addition of
7235 this TU's symbols to the existing symtab. */
7236 if (sig_type
->type_unit_group
->primary_symtab
== NULL
)
7238 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7239 sig_type
->type_unit_group
->primary_symtab
= symtab
;
7243 /* Set symtab language to language from DW_AT_language. If the
7244 compilation is from a C file generated by language preprocessors,
7245 do not set the language if it was already deduced by
7247 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7248 symtab
->language
= cu
->language
;
7253 augment_type_symtab (objfile
,
7254 sig_type
->type_unit_group
->primary_symtab
);
7255 symtab
= sig_type
->type_unit_group
->primary_symtab
;
7258 if (dwarf2_per_objfile
->using_index
)
7259 per_cu
->v
.quick
->symtab
= symtab
;
7262 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7263 pst
->symtab
= symtab
;
7267 do_cleanups (back_to
);
7270 /* Process an imported unit DIE. */
7273 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7275 struct attribute
*attr
;
7277 /* For now we don't handle imported units in type units. */
7278 if (cu
->per_cu
->is_debug_types
)
7280 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7281 " supported in type units [in module %s]"),
7285 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7288 struct dwarf2_per_cu_data
*per_cu
;
7289 struct symtab
*imported_symtab
;
7293 offset
= dwarf2_get_ref_die_offset (attr
);
7294 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7295 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7297 /* Queue the unit, if needed. */
7298 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7299 load_full_comp_unit (per_cu
, cu
->language
);
7301 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7306 /* Process a die and its children. */
7309 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7313 case DW_TAG_padding
:
7315 case DW_TAG_compile_unit
:
7316 case DW_TAG_partial_unit
:
7317 read_file_scope (die
, cu
);
7319 case DW_TAG_type_unit
:
7320 read_type_unit_scope (die
, cu
);
7322 case DW_TAG_subprogram
:
7323 case DW_TAG_inlined_subroutine
:
7324 read_func_scope (die
, cu
);
7326 case DW_TAG_lexical_block
:
7327 case DW_TAG_try_block
:
7328 case DW_TAG_catch_block
:
7329 read_lexical_block_scope (die
, cu
);
7331 case DW_TAG_GNU_call_site
:
7332 read_call_site_scope (die
, cu
);
7334 case DW_TAG_class_type
:
7335 case DW_TAG_interface_type
:
7336 case DW_TAG_structure_type
:
7337 case DW_TAG_union_type
:
7338 process_structure_scope (die
, cu
);
7340 case DW_TAG_enumeration_type
:
7341 process_enumeration_scope (die
, cu
);
7344 /* These dies have a type, but processing them does not create
7345 a symbol or recurse to process the children. Therefore we can
7346 read them on-demand through read_type_die. */
7347 case DW_TAG_subroutine_type
:
7348 case DW_TAG_set_type
:
7349 case DW_TAG_array_type
:
7350 case DW_TAG_pointer_type
:
7351 case DW_TAG_ptr_to_member_type
:
7352 case DW_TAG_reference_type
:
7353 case DW_TAG_string_type
:
7356 case DW_TAG_base_type
:
7357 case DW_TAG_subrange_type
:
7358 case DW_TAG_typedef
:
7359 /* Add a typedef symbol for the type definition, if it has a
7361 new_symbol (die
, read_type_die (die
, cu
), cu
);
7363 case DW_TAG_common_block
:
7364 read_common_block (die
, cu
);
7366 case DW_TAG_common_inclusion
:
7368 case DW_TAG_namespace
:
7369 cu
->processing_has_namespace_info
= 1;
7370 read_namespace (die
, cu
);
7373 cu
->processing_has_namespace_info
= 1;
7374 read_module (die
, cu
);
7376 case DW_TAG_imported_declaration
:
7377 case DW_TAG_imported_module
:
7378 cu
->processing_has_namespace_info
= 1;
7379 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7380 || cu
->language
!= language_fortran
))
7381 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7382 dwarf_tag_name (die
->tag
));
7383 read_import_statement (die
, cu
);
7386 case DW_TAG_imported_unit
:
7387 process_imported_unit_die (die
, cu
);
7391 new_symbol (die
, NULL
, cu
);
7396 /* DWARF name computation. */
7398 /* A helper function for dwarf2_compute_name which determines whether DIE
7399 needs to have the name of the scope prepended to the name listed in the
7403 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7405 struct attribute
*attr
;
7409 case DW_TAG_namespace
:
7410 case DW_TAG_typedef
:
7411 case DW_TAG_class_type
:
7412 case DW_TAG_interface_type
:
7413 case DW_TAG_structure_type
:
7414 case DW_TAG_union_type
:
7415 case DW_TAG_enumeration_type
:
7416 case DW_TAG_enumerator
:
7417 case DW_TAG_subprogram
:
7421 case DW_TAG_variable
:
7422 case DW_TAG_constant
:
7423 /* We only need to prefix "globally" visible variables. These include
7424 any variable marked with DW_AT_external or any variable that
7425 lives in a namespace. [Variables in anonymous namespaces
7426 require prefixing, but they are not DW_AT_external.] */
7428 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7430 struct dwarf2_cu
*spec_cu
= cu
;
7432 return die_needs_namespace (die_specification (die
, &spec_cu
),
7436 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7437 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7438 && die
->parent
->tag
!= DW_TAG_module
)
7440 /* A variable in a lexical block of some kind does not need a
7441 namespace, even though in C++ such variables may be external
7442 and have a mangled name. */
7443 if (die
->parent
->tag
== DW_TAG_lexical_block
7444 || die
->parent
->tag
== DW_TAG_try_block
7445 || die
->parent
->tag
== DW_TAG_catch_block
7446 || die
->parent
->tag
== DW_TAG_subprogram
)
7455 /* Retrieve the last character from a mem_file. */
7458 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7460 char *last_char_p
= (char *) object
;
7463 *last_char_p
= buffer
[length
- 1];
7466 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7467 compute the physname for the object, which include a method's:
7468 - formal parameters (C++/Java),
7469 - receiver type (Go),
7470 - return type (Java).
7472 The term "physname" is a bit confusing.
7473 For C++, for example, it is the demangled name.
7474 For Go, for example, it's the mangled name.
7476 For Ada, return the DIE's linkage name rather than the fully qualified
7477 name. PHYSNAME is ignored..
7479 The result is allocated on the objfile_obstack and canonicalized. */
7482 dwarf2_compute_name (const char *name
,
7483 struct die_info
*die
, struct dwarf2_cu
*cu
,
7486 struct objfile
*objfile
= cu
->objfile
;
7489 name
= dwarf2_name (die
, cu
);
7491 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7492 compute it by typename_concat inside GDB. */
7493 if (cu
->language
== language_ada
7494 || (cu
->language
== language_fortran
&& physname
))
7496 /* For Ada unit, we prefer the linkage name over the name, as
7497 the former contains the exported name, which the user expects
7498 to be able to reference. Ideally, we want the user to be able
7499 to reference this entity using either natural or linkage name,
7500 but we haven't started looking at this enhancement yet. */
7501 struct attribute
*attr
;
7503 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7505 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7506 if (attr
&& DW_STRING (attr
))
7507 return DW_STRING (attr
);
7510 /* These are the only languages we know how to qualify names in. */
7512 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7513 || cu
->language
== language_fortran
))
7515 if (die_needs_namespace (die
, cu
))
7519 struct ui_file
*buf
;
7521 prefix
= determine_prefix (die
, cu
);
7522 buf
= mem_fileopen ();
7523 if (*prefix
!= '\0')
7525 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7528 fputs_unfiltered (prefixed_name
, buf
);
7529 xfree (prefixed_name
);
7532 fputs_unfiltered (name
, buf
);
7534 /* Template parameters may be specified in the DIE's DW_AT_name, or
7535 as children with DW_TAG_template_type_param or
7536 DW_TAG_value_type_param. If the latter, add them to the name
7537 here. If the name already has template parameters, then
7538 skip this step; some versions of GCC emit both, and
7539 it is more efficient to use the pre-computed name.
7541 Something to keep in mind about this process: it is very
7542 unlikely, or in some cases downright impossible, to produce
7543 something that will match the mangled name of a function.
7544 If the definition of the function has the same debug info,
7545 we should be able to match up with it anyway. But fallbacks
7546 using the minimal symbol, for instance to find a method
7547 implemented in a stripped copy of libstdc++, will not work.
7548 If we do not have debug info for the definition, we will have to
7549 match them up some other way.
7551 When we do name matching there is a related problem with function
7552 templates; two instantiated function templates are allowed to
7553 differ only by their return types, which we do not add here. */
7555 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7557 struct attribute
*attr
;
7558 struct die_info
*child
;
7561 die
->building_fullname
= 1;
7563 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7567 const gdb_byte
*bytes
;
7568 struct dwarf2_locexpr_baton
*baton
;
7571 if (child
->tag
!= DW_TAG_template_type_param
7572 && child
->tag
!= DW_TAG_template_value_param
)
7577 fputs_unfiltered ("<", buf
);
7581 fputs_unfiltered (", ", buf
);
7583 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7586 complaint (&symfile_complaints
,
7587 _("template parameter missing DW_AT_type"));
7588 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7591 type
= die_type (child
, cu
);
7593 if (child
->tag
== DW_TAG_template_type_param
)
7595 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7599 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7602 complaint (&symfile_complaints
,
7603 _("template parameter missing "
7604 "DW_AT_const_value"));
7605 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7609 dwarf2_const_value_attr (attr
, type
, name
,
7610 &cu
->comp_unit_obstack
, cu
,
7611 &value
, &bytes
, &baton
);
7613 if (TYPE_NOSIGN (type
))
7614 /* GDB prints characters as NUMBER 'CHAR'. If that's
7615 changed, this can use value_print instead. */
7616 c_printchar (value
, type
, buf
);
7619 struct value_print_options opts
;
7622 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7626 else if (bytes
!= NULL
)
7628 v
= allocate_value (type
);
7629 memcpy (value_contents_writeable (v
), bytes
,
7630 TYPE_LENGTH (type
));
7633 v
= value_from_longest (type
, value
);
7635 /* Specify decimal so that we do not depend on
7637 get_formatted_print_options (&opts
, 'd');
7639 value_print (v
, buf
, &opts
);
7645 die
->building_fullname
= 0;
7649 /* Close the argument list, with a space if necessary
7650 (nested templates). */
7651 char last_char
= '\0';
7652 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7653 if (last_char
== '>')
7654 fputs_unfiltered (" >", buf
);
7656 fputs_unfiltered (">", buf
);
7660 /* For Java and C++ methods, append formal parameter type
7661 information, if PHYSNAME. */
7663 if (physname
&& die
->tag
== DW_TAG_subprogram
7664 && (cu
->language
== language_cplus
7665 || cu
->language
== language_java
))
7667 struct type
*type
= read_type_die (die
, cu
);
7669 c_type_print_args (type
, buf
, 1, cu
->language
,
7670 &type_print_raw_options
);
7672 if (cu
->language
== language_java
)
7674 /* For java, we must append the return type to method
7676 if (die
->tag
== DW_TAG_subprogram
)
7677 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7678 0, 0, &type_print_raw_options
);
7680 else if (cu
->language
== language_cplus
)
7682 /* Assume that an artificial first parameter is
7683 "this", but do not crash if it is not. RealView
7684 marks unnamed (and thus unused) parameters as
7685 artificial; there is no way to differentiate
7687 if (TYPE_NFIELDS (type
) > 0
7688 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7689 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7690 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7692 fputs_unfiltered (" const", buf
);
7696 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7698 ui_file_delete (buf
);
7700 if (cu
->language
== language_cplus
)
7703 = dwarf2_canonicalize_name (name
, cu
,
7704 &objfile
->objfile_obstack
);
7715 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7716 If scope qualifiers are appropriate they will be added. The result
7717 will be allocated on the objfile_obstack, or NULL if the DIE does
7718 not have a name. NAME may either be from a previous call to
7719 dwarf2_name or NULL.
7721 The output string will be canonicalized (if C++/Java). */
7724 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7726 return dwarf2_compute_name (name
, die
, cu
, 0);
7729 /* Construct a physname for the given DIE in CU. NAME may either be
7730 from a previous call to dwarf2_name or NULL. The result will be
7731 allocated on the objfile_objstack or NULL if the DIE does not have a
7734 The output string will be canonicalized (if C++/Java). */
7737 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7739 struct objfile
*objfile
= cu
->objfile
;
7740 struct attribute
*attr
;
7741 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7742 struct cleanup
*back_to
;
7745 /* In this case dwarf2_compute_name is just a shortcut not building anything
7747 if (!die_needs_namespace (die
, cu
))
7748 return dwarf2_compute_name (name
, die
, cu
, 1);
7750 back_to
= make_cleanup (null_cleanup
, NULL
);
7752 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7754 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7756 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7758 if (attr
&& DW_STRING (attr
))
7762 mangled
= DW_STRING (attr
);
7764 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7765 type. It is easier for GDB users to search for such functions as
7766 `name(params)' than `long name(params)'. In such case the minimal
7767 symbol names do not match the full symbol names but for template
7768 functions there is never a need to look up their definition from their
7769 declaration so the only disadvantage remains the minimal symbol
7770 variant `long name(params)' does not have the proper inferior type.
7773 if (cu
->language
== language_go
)
7775 /* This is a lie, but we already lie to the caller new_symbol_full.
7776 new_symbol_full assumes we return the mangled name.
7777 This just undoes that lie until things are cleaned up. */
7782 demangled
= gdb_demangle (mangled
,
7783 (DMGL_PARAMS
| DMGL_ANSI
7784 | (cu
->language
== language_java
7785 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7790 make_cleanup (xfree
, demangled
);
7800 if (canon
== NULL
|| check_physname
)
7802 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7804 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7806 /* It may not mean a bug in GDB. The compiler could also
7807 compute DW_AT_linkage_name incorrectly. But in such case
7808 GDB would need to be bug-to-bug compatible. */
7810 complaint (&symfile_complaints
,
7811 _("Computed physname <%s> does not match demangled <%s> "
7812 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7813 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7815 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7816 is available here - over computed PHYSNAME. It is safer
7817 against both buggy GDB and buggy compilers. */
7831 retval
= obstack_copy0 (&objfile
->objfile_obstack
, retval
, strlen (retval
));
7833 do_cleanups (back_to
);
7837 /* Read the import statement specified by the given die and record it. */
7840 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7842 struct objfile
*objfile
= cu
->objfile
;
7843 struct attribute
*import_attr
;
7844 struct die_info
*imported_die
, *child_die
;
7845 struct dwarf2_cu
*imported_cu
;
7846 const char *imported_name
;
7847 const char *imported_name_prefix
;
7848 const char *canonical_name
;
7849 const char *import_alias
;
7850 const char *imported_declaration
= NULL
;
7851 const char *import_prefix
;
7852 VEC (const_char_ptr
) *excludes
= NULL
;
7853 struct cleanup
*cleanups
;
7855 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7856 if (import_attr
== NULL
)
7858 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7859 dwarf_tag_name (die
->tag
));
7864 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7865 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7866 if (imported_name
== NULL
)
7868 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7870 The import in the following code:
7884 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7885 <52> DW_AT_decl_file : 1
7886 <53> DW_AT_decl_line : 6
7887 <54> DW_AT_import : <0x75>
7888 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7890 <5b> DW_AT_decl_file : 1
7891 <5c> DW_AT_decl_line : 2
7892 <5d> DW_AT_type : <0x6e>
7894 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7895 <76> DW_AT_byte_size : 4
7896 <77> DW_AT_encoding : 5 (signed)
7898 imports the wrong die ( 0x75 instead of 0x58 ).
7899 This case will be ignored until the gcc bug is fixed. */
7903 /* Figure out the local name after import. */
7904 import_alias
= dwarf2_name (die
, cu
);
7906 /* Figure out where the statement is being imported to. */
7907 import_prefix
= determine_prefix (die
, cu
);
7909 /* Figure out what the scope of the imported die is and prepend it
7910 to the name of the imported die. */
7911 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7913 if (imported_die
->tag
!= DW_TAG_namespace
7914 && imported_die
->tag
!= DW_TAG_module
)
7916 imported_declaration
= imported_name
;
7917 canonical_name
= imported_name_prefix
;
7919 else if (strlen (imported_name_prefix
) > 0)
7920 canonical_name
= obconcat (&objfile
->objfile_obstack
,
7921 imported_name_prefix
, "::", imported_name
,
7924 canonical_name
= imported_name
;
7926 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7928 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7929 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7930 child_die
= sibling_die (child_die
))
7932 /* DWARF-4: A Fortran use statement with a “rename list” may be
7933 represented by an imported module entry with an import attribute
7934 referring to the module and owned entries corresponding to those
7935 entities that are renamed as part of being imported. */
7937 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7939 complaint (&symfile_complaints
,
7940 _("child DW_TAG_imported_declaration expected "
7941 "- DIE at 0x%x [in module %s]"),
7942 child_die
->offset
.sect_off
, objfile
->name
);
7946 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7947 if (import_attr
== NULL
)
7949 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7950 dwarf_tag_name (child_die
->tag
));
7955 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7957 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7958 if (imported_name
== NULL
)
7960 complaint (&symfile_complaints
,
7961 _("child DW_TAG_imported_declaration has unknown "
7962 "imported name - DIE at 0x%x [in module %s]"),
7963 child_die
->offset
.sect_off
, objfile
->name
);
7967 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7969 process_die (child_die
, cu
);
7972 cp_add_using_directive (import_prefix
,
7975 imported_declaration
,
7978 &objfile
->objfile_obstack
);
7980 do_cleanups (cleanups
);
7983 /* Cleanup function for handle_DW_AT_stmt_list. */
7986 free_cu_line_header (void *arg
)
7988 struct dwarf2_cu
*cu
= arg
;
7990 free_line_header (cu
->line_header
);
7991 cu
->line_header
= NULL
;
7994 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7995 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7996 this, it was first present in GCC release 4.3.0. */
7999 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
8001 if (!cu
->checked_producer
)
8002 check_producer (cu
);
8004 return cu
->producer_is_gcc_lt_4_3
;
8008 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
8009 const char **name
, const char **comp_dir
)
8011 struct attribute
*attr
;
8016 /* Find the filename. Do not use dwarf2_name here, since the filename
8017 is not a source language identifier. */
8018 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8021 *name
= DW_STRING (attr
);
8024 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
8026 *comp_dir
= DW_STRING (attr
);
8027 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
8028 && IS_ABSOLUTE_PATH (*name
))
8030 char *d
= ldirname (*name
);
8034 make_cleanup (xfree
, d
);
8036 if (*comp_dir
!= NULL
)
8038 /* Irix 6.2 native cc prepends <machine>.: to the compilation
8039 directory, get rid of it. */
8040 char *cp
= strchr (*comp_dir
, ':');
8042 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
8047 *name
= "<unknown>";
8050 /* Handle DW_AT_stmt_list for a compilation unit.
8051 DIE is the DW_TAG_compile_unit die for CU.
8052 COMP_DIR is the compilation directory.
8053 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
8056 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
8057 const char *comp_dir
)
8059 struct attribute
*attr
;
8061 gdb_assert (! cu
->per_cu
->is_debug_types
);
8063 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8066 unsigned int line_offset
= DW_UNSND (attr
);
8067 struct line_header
*line_header
8068 = dwarf_decode_line_header (line_offset
, cu
);
8072 cu
->line_header
= line_header
;
8073 make_cleanup (free_cu_line_header
, cu
);
8074 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
8079 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
8082 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8084 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8085 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
8086 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
8087 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
8088 struct attribute
*attr
;
8089 const char *name
= NULL
;
8090 const char *comp_dir
= NULL
;
8091 struct die_info
*child_die
;
8092 bfd
*abfd
= objfile
->obfd
;
8095 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8097 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
8099 /* If we didn't find a lowpc, set it to highpc to avoid complaints
8100 from finish_block. */
8101 if (lowpc
== ((CORE_ADDR
) -1))
8106 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
8108 prepare_one_comp_unit (cu
, die
, cu
->language
);
8110 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
8111 standardised yet. As a workaround for the language detection we fall
8112 back to the DW_AT_producer string. */
8113 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
8114 cu
->language
= language_opencl
;
8116 /* Similar hack for Go. */
8117 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
8118 set_cu_language (DW_LANG_Go
, cu
);
8120 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
8122 /* Decode line number information if present. We do this before
8123 processing child DIEs, so that the line header table is available
8124 for DW_AT_decl_file. */
8125 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
8127 /* Process all dies in compilation unit. */
8128 if (die
->child
!= NULL
)
8130 child_die
= die
->child
;
8131 while (child_die
&& child_die
->tag
)
8133 process_die (child_die
, cu
);
8134 child_die
= sibling_die (child_die
);
8138 /* Decode macro information, if present. Dwarf 2 macro information
8139 refers to information in the line number info statement program
8140 header, so we can only read it if we've read the header
8142 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
8143 if (attr
&& cu
->line_header
)
8145 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
8146 complaint (&symfile_complaints
,
8147 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
8149 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
8153 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
8154 if (attr
&& cu
->line_header
)
8156 unsigned int macro_offset
= DW_UNSND (attr
);
8158 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
8162 do_cleanups (back_to
);
8165 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8166 Create the set of symtabs used by this TU, or if this TU is sharing
8167 symtabs with another TU and the symtabs have already been created
8168 then restore those symtabs in the line header.
8169 We don't need the pc/line-number mapping for type units. */
8172 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
8174 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8175 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8176 struct type_unit_group
*tu_group
;
8178 struct line_header
*lh
;
8179 struct attribute
*attr
;
8180 unsigned int i
, line_offset
;
8181 struct signatured_type
*sig_type
;
8183 gdb_assert (per_cu
->is_debug_types
);
8184 sig_type
= (struct signatured_type
*) per_cu
;
8186 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8188 /* If we're using .gdb_index (includes -readnow) then
8189 per_cu->s.type_unit_group may not have been set up yet. */
8190 if (sig_type
->type_unit_group
== NULL
)
8191 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
8192 tu_group
= sig_type
->type_unit_group
;
8194 /* If we've already processed this stmt_list there's no real need to
8195 do it again, we could fake it and just recreate the part we need
8196 (file name,index -> symtab mapping). If data shows this optimization
8197 is useful we can do it then. */
8198 first_time
= tu_group
->primary_symtab
== NULL
;
8200 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8205 line_offset
= DW_UNSND (attr
);
8206 lh
= dwarf_decode_line_header (line_offset
, cu
);
8211 dwarf2_start_symtab (cu
, "", NULL
, 0);
8214 gdb_assert (tu_group
->symtabs
== NULL
);
8217 /* Note: The primary symtab will get allocated at the end. */
8221 cu
->line_header
= lh
;
8222 make_cleanup (free_cu_line_header
, cu
);
8226 dwarf2_start_symtab (cu
, "", NULL
, 0);
8228 tu_group
->num_symtabs
= lh
->num_file_names
;
8229 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8231 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8233 const char *dir
= NULL
;
8234 struct file_entry
*fe
= &lh
->file_names
[i
];
8237 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8238 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8240 /* Note: We don't have to watch for the main subfile here, type units
8241 don't have DW_AT_name. */
8243 if (current_subfile
->symtab
== NULL
)
8245 /* NOTE: start_subfile will recognize when it's been passed
8246 a file it has already seen. So we can't assume there's a
8247 simple mapping from lh->file_names to subfiles,
8248 lh->file_names may contain dups. */
8249 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8253 fe
->symtab
= current_subfile
->symtab
;
8254 tu_group
->symtabs
[i
] = fe
->symtab
;
8261 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8263 struct file_entry
*fe
= &lh
->file_names
[i
];
8265 fe
->symtab
= tu_group
->symtabs
[i
];
8269 /* The main symtab is allocated last. Type units don't have DW_AT_name
8270 so they don't have a "real" (so to speak) symtab anyway.
8271 There is later code that will assign the main symtab to all symbols
8272 that don't have one. We need to handle the case of a symbol with a
8273 missing symtab (DW_AT_decl_file) anyway. */
8276 /* Process DW_TAG_type_unit.
8277 For TUs we want to skip the first top level sibling if it's not the
8278 actual type being defined by this TU. In this case the first top
8279 level sibling is there to provide context only. */
8282 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8284 struct die_info
*child_die
;
8286 prepare_one_comp_unit (cu
, die
, language_minimal
);
8288 /* Initialize (or reinitialize) the machinery for building symtabs.
8289 We do this before processing child DIEs, so that the line header table
8290 is available for DW_AT_decl_file. */
8291 setup_type_unit_groups (die
, cu
);
8293 if (die
->child
!= NULL
)
8295 child_die
= die
->child
;
8296 while (child_die
&& child_die
->tag
)
8298 process_die (child_die
, cu
);
8299 child_die
= sibling_die (child_die
);
8306 http://gcc.gnu.org/wiki/DebugFission
8307 http://gcc.gnu.org/wiki/DebugFissionDWP
8309 To simplify handling of both DWO files ("object" files with the DWARF info)
8310 and DWP files (a file with the DWOs packaged up into one file), we treat
8311 DWP files as having a collection of virtual DWO files. */
8314 hash_dwo_file (const void *item
)
8316 const struct dwo_file
*dwo_file
= item
;
8318 return (htab_hash_string (dwo_file
->dwo_name
)
8319 + htab_hash_string (dwo_file
->comp_dir
));
8323 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8325 const struct dwo_file
*lhs
= item_lhs
;
8326 const struct dwo_file
*rhs
= item_rhs
;
8328 return (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) == 0
8329 && strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0);
8332 /* Allocate a hash table for DWO files. */
8335 allocate_dwo_file_hash_table (void)
8337 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8339 return htab_create_alloc_ex (41,
8343 &objfile
->objfile_obstack
,
8344 hashtab_obstack_allocate
,
8345 dummy_obstack_deallocate
);
8348 /* Lookup DWO file DWO_NAME. */
8351 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
8353 struct dwo_file find_entry
;
8356 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8357 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8359 memset (&find_entry
, 0, sizeof (find_entry
));
8360 find_entry
.dwo_name
= dwo_name
;
8361 find_entry
.comp_dir
= comp_dir
;
8362 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8368 hash_dwo_unit (const void *item
)
8370 const struct dwo_unit
*dwo_unit
= item
;
8372 /* This drops the top 32 bits of the id, but is ok for a hash. */
8373 return dwo_unit
->signature
;
8377 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8379 const struct dwo_unit
*lhs
= item_lhs
;
8380 const struct dwo_unit
*rhs
= item_rhs
;
8382 /* The signature is assumed to be unique within the DWO file.
8383 So while object file CU dwo_id's always have the value zero,
8384 that's OK, assuming each object file DWO file has only one CU,
8385 and that's the rule for now. */
8386 return lhs
->signature
== rhs
->signature
;
8389 /* Allocate a hash table for DWO CUs,TUs.
8390 There is one of these tables for each of CUs,TUs for each DWO file. */
8393 allocate_dwo_unit_table (struct objfile
*objfile
)
8395 /* Start out with a pretty small number.
8396 Generally DWO files contain only one CU and maybe some TUs. */
8397 return htab_create_alloc_ex (3,
8401 &objfile
->objfile_obstack
,
8402 hashtab_obstack_allocate
,
8403 dummy_obstack_deallocate
);
8406 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8408 struct create_dwo_cu_data
8410 struct dwo_file
*dwo_file
;
8411 struct dwo_unit dwo_unit
;
8414 /* die_reader_func for create_dwo_cu. */
8417 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
8418 const gdb_byte
*info_ptr
,
8419 struct die_info
*comp_unit_die
,
8423 struct dwarf2_cu
*cu
= reader
->cu
;
8424 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8425 sect_offset offset
= cu
->per_cu
->offset
;
8426 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
8427 struct create_dwo_cu_data
*data
= datap
;
8428 struct dwo_file
*dwo_file
= data
->dwo_file
;
8429 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
8430 struct attribute
*attr
;
8432 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8435 complaint (&symfile_complaints
,
8436 _("Dwarf Error: debug entry at offset 0x%x is missing"
8437 " its dwo_id [in module %s]"),
8438 offset
.sect_off
, dwo_file
->dwo_name
);
8442 dwo_unit
->dwo_file
= dwo_file
;
8443 dwo_unit
->signature
= DW_UNSND (attr
);
8444 dwo_unit
->section
= section
;
8445 dwo_unit
->offset
= offset
;
8446 dwo_unit
->length
= cu
->per_cu
->length
;
8448 if (dwarf2_read_debug
)
8449 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
8450 offset
.sect_off
, hex_string (dwo_unit
->signature
));
8453 /* Create the dwo_unit for the lone CU in DWO_FILE.
8454 Note: This function processes DWO files only, not DWP files. */
8456 static struct dwo_unit
*
8457 create_dwo_cu (struct dwo_file
*dwo_file
)
8459 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8460 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8463 const gdb_byte
*info_ptr
, *end_ptr
;
8464 struct create_dwo_cu_data create_dwo_cu_data
;
8465 struct dwo_unit
*dwo_unit
;
8467 dwarf2_read_section (objfile
, section
);
8468 info_ptr
= section
->buffer
;
8470 if (info_ptr
== NULL
)
8473 /* We can't set abfd until now because the section may be empty or
8474 not present, in which case section->asection will be NULL. */
8475 abfd
= section
->asection
->owner
;
8477 if (dwarf2_read_debug
)
8479 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
8480 bfd_section_name (abfd
, section
->asection
),
8481 bfd_get_filename (abfd
));
8484 create_dwo_cu_data
.dwo_file
= dwo_file
;
8487 end_ptr
= info_ptr
+ section
->size
;
8488 while (info_ptr
< end_ptr
)
8490 struct dwarf2_per_cu_data per_cu
;
8492 memset (&create_dwo_cu_data
.dwo_unit
, 0,
8493 sizeof (create_dwo_cu_data
.dwo_unit
));
8494 memset (&per_cu
, 0, sizeof (per_cu
));
8495 per_cu
.objfile
= objfile
;
8496 per_cu
.is_debug_types
= 0;
8497 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8498 per_cu
.section
= section
;
8500 init_cutu_and_read_dies_no_follow (&per_cu
,
8501 &dwo_file
->sections
.abbrev
,
8503 create_dwo_cu_reader
,
8504 &create_dwo_cu_data
);
8506 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
8508 /* If we've already found one, complain. We only support one
8509 because having more than one requires hacking the dwo_name of
8510 each to match, which is highly unlikely to happen. */
8511 if (dwo_unit
!= NULL
)
8513 complaint (&symfile_complaints
,
8514 _("Multiple CUs in DWO file %s [in module %s]"),
8515 dwo_file
->dwo_name
, objfile
->name
);
8519 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8520 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
8523 info_ptr
+= per_cu
.length
;
8529 /* DWP file .debug_{cu,tu}_index section format:
8530 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8532 Both index sections have the same format, and serve to map a 64-bit
8533 signature to a set of section numbers. Each section begins with a header,
8534 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8535 indexes, and a pool of 32-bit section numbers. The index sections will be
8536 aligned at 8-byte boundaries in the file.
8538 The index section header contains two unsigned 32-bit values (using the
8539 byte order of the application binary):
8541 N, the number of compilation units or type units in the index
8542 M, the number of slots in the hash table
8544 (We assume that N and M will not exceed 2^32 - 1.)
8546 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8548 The hash table begins at offset 8 in the section, and consists of an array
8549 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8550 order of the application binary). Unused slots in the hash table are 0.
8551 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8553 The parallel table begins immediately after the hash table
8554 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8555 array of 32-bit indexes (using the byte order of the application binary),
8556 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8557 table contains a 32-bit index into the pool of section numbers. For unused
8558 hash table slots, the corresponding entry in the parallel table will be 0.
8560 Given a 64-bit compilation unit signature or a type signature S, an entry
8561 in the hash table is located as follows:
8563 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8564 the low-order k bits all set to 1.
8566 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8568 3) If the hash table entry at index H matches the signature, use that
8569 entry. If the hash table entry at index H is unused (all zeroes),
8570 terminate the search: the signature is not present in the table.
8572 4) Let H = (H + H') modulo M. Repeat at Step 3.
8574 Because M > N and H' and M are relatively prime, the search is guaranteed
8575 to stop at an unused slot or find the match.
8577 The pool of section numbers begins immediately following the hash table
8578 (at offset 8 + 12 * M from the beginning of the section). The pool of
8579 section numbers consists of an array of 32-bit words (using the byte order
8580 of the application binary). Each item in the array is indexed starting
8581 from 0. The hash table entry provides the index of the first section
8582 number in the set. Additional section numbers in the set follow, and the
8583 set is terminated by a 0 entry (section number 0 is not used in ELF).
8585 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8586 section must be the first entry in the set, and the .debug_abbrev.dwo must
8587 be the second entry. Other members of the set may follow in any order. */
8589 /* Create a hash table to map DWO IDs to their CU/TU entry in
8590 .debug_{info,types}.dwo in DWP_FILE.
8591 Returns NULL if there isn't one.
8592 Note: This function processes DWP files only, not DWO files. */
8594 static struct dwp_hash_table
*
8595 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8597 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8598 bfd
*dbfd
= dwp_file
->dbfd
;
8599 const gdb_byte
*index_ptr
, *index_end
;
8600 struct dwarf2_section_info
*index
;
8601 uint32_t version
, nr_units
, nr_slots
;
8602 struct dwp_hash_table
*htab
;
8605 index
= &dwp_file
->sections
.tu_index
;
8607 index
= &dwp_file
->sections
.cu_index
;
8609 if (dwarf2_section_empty_p (index
))
8611 dwarf2_read_section (objfile
, index
);
8613 index_ptr
= index
->buffer
;
8614 index_end
= index_ptr
+ index
->size
;
8616 version
= read_4_bytes (dbfd
, index_ptr
);
8617 index_ptr
+= 8; /* Skip the unused word. */
8618 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8620 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8625 error (_("Dwarf Error: unsupported DWP file version (%u)"
8627 version
, dwp_file
->name
);
8629 if (nr_slots
!= (nr_slots
& -nr_slots
))
8631 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8632 " is not power of 2 [in module %s]"),
8633 nr_slots
, dwp_file
->name
);
8636 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8637 htab
->nr_units
= nr_units
;
8638 htab
->nr_slots
= nr_slots
;
8639 htab
->hash_table
= index_ptr
;
8640 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8641 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8646 /* Update SECTIONS with the data from SECTP.
8648 This function is like the other "locate" section routines that are
8649 passed to bfd_map_over_sections, but in this context the sections to
8650 read comes from the DWP hash table, not the full ELF section table.
8652 The result is non-zero for success, or zero if an error was found. */
8655 locate_virtual_dwo_sections (asection
*sectp
,
8656 struct virtual_dwo_sections
*sections
)
8658 const struct dwop_section_names
*names
= &dwop_section_names
;
8660 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8662 /* There can be only one. */
8663 if (sections
->abbrev
.asection
!= NULL
)
8665 sections
->abbrev
.asection
= sectp
;
8666 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8668 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8669 || section_is_p (sectp
->name
, &names
->types_dwo
))
8671 /* There can be only one. */
8672 if (sections
->info_or_types
.asection
!= NULL
)
8674 sections
->info_or_types
.asection
= sectp
;
8675 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8677 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8679 /* There can be only one. */
8680 if (sections
->line
.asection
!= NULL
)
8682 sections
->line
.asection
= sectp
;
8683 sections
->line
.size
= bfd_get_section_size (sectp
);
8685 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8687 /* There can be only one. */
8688 if (sections
->loc
.asection
!= NULL
)
8690 sections
->loc
.asection
= sectp
;
8691 sections
->loc
.size
= bfd_get_section_size (sectp
);
8693 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8695 /* There can be only one. */
8696 if (sections
->macinfo
.asection
!= NULL
)
8698 sections
->macinfo
.asection
= sectp
;
8699 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8701 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8703 /* There can be only one. */
8704 if (sections
->macro
.asection
!= NULL
)
8706 sections
->macro
.asection
= sectp
;
8707 sections
->macro
.size
= bfd_get_section_size (sectp
);
8709 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8711 /* There can be only one. */
8712 if (sections
->str_offsets
.asection
!= NULL
)
8714 sections
->str_offsets
.asection
= sectp
;
8715 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8719 /* No other kind of section is valid. */
8726 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8727 HTAB is the hash table from the DWP file.
8728 SECTION_INDEX is the index of the DWO in HTAB.
8729 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. */
8731 static struct dwo_unit
*
8732 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8733 const struct dwp_hash_table
*htab
,
8734 uint32_t section_index
,
8735 const char *comp_dir
,
8736 ULONGEST signature
, int is_debug_types
)
8738 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8739 bfd
*dbfd
= dwp_file
->dbfd
;
8740 const char *kind
= is_debug_types
? "TU" : "CU";
8741 struct dwo_file
*dwo_file
;
8742 struct dwo_unit
*dwo_unit
;
8743 struct virtual_dwo_sections sections
;
8744 void **dwo_file_slot
;
8745 char *virtual_dwo_name
;
8746 struct dwarf2_section_info
*cutu
;
8747 struct cleanup
*cleanups
;
8750 if (dwarf2_read_debug
)
8752 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/%s in DWP file: %s\n",
8754 section_index
, hex_string (signature
),
8758 /* Fetch the sections of this DWO.
8759 Put a limit on the number of sections we look for so that bad data
8760 doesn't cause us to loop forever. */
8762 #define MAX_NR_DWO_SECTIONS \
8763 (1 /* .debug_info or .debug_types */ \
8764 + 1 /* .debug_abbrev */ \
8765 + 1 /* .debug_line */ \
8766 + 1 /* .debug_loc */ \
8767 + 1 /* .debug_str_offsets */ \
8768 + 1 /* .debug_macro */ \
8769 + 1 /* .debug_macinfo */ \
8770 + 1 /* trailing zero */)
8772 memset (§ions
, 0, sizeof (sections
));
8773 cleanups
= make_cleanup (null_cleanup
, 0);
8775 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8778 uint32_t section_nr
=
8781 + (section_index
+ i
) * sizeof (uint32_t));
8783 if (section_nr
== 0)
8785 if (section_nr
>= dwp_file
->num_sections
)
8787 error (_("Dwarf Error: bad DWP hash table, section number too large"
8792 sectp
= dwp_file
->elf_sections
[section_nr
];
8793 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8795 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8802 || sections
.info_or_types
.asection
== NULL
8803 || sections
.abbrev
.asection
== NULL
)
8805 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8809 if (i
== MAX_NR_DWO_SECTIONS
)
8811 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8816 /* It's easier for the rest of the code if we fake a struct dwo_file and
8817 have dwo_unit "live" in that. At least for now.
8819 The DWP file can be made up of a random collection of CUs and TUs.
8820 However, for each CU + set of TUs that came from the same original DWO
8821 file, we want to combine them back into a virtual DWO file to save space
8822 (fewer struct dwo_file objects to allocated). Remember that for really
8823 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8826 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8827 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8828 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8829 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8830 (sections
.str_offsets
.asection
8831 ? sections
.str_offsets
.asection
->id
8833 make_cleanup (xfree
, virtual_dwo_name
);
8834 /* Can we use an existing virtual DWO file? */
8835 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
8836 /* Create one if necessary. */
8837 if (*dwo_file_slot
== NULL
)
8839 if (dwarf2_read_debug
)
8841 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8844 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8845 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
8847 strlen (virtual_dwo_name
));
8848 dwo_file
->comp_dir
= comp_dir
;
8849 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8850 dwo_file
->sections
.line
= sections
.line
;
8851 dwo_file
->sections
.loc
= sections
.loc
;
8852 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8853 dwo_file
->sections
.macro
= sections
.macro
;
8854 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8855 /* The "str" section is global to the entire DWP file. */
8856 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8857 /* The info or types section is assigned later to dwo_unit,
8858 there's no need to record it in dwo_file.
8859 Also, we can't simply record type sections in dwo_file because
8860 we record a pointer into the vector in dwo_unit. As we collect more
8861 types we'll grow the vector and eventually have to reallocate space
8862 for it, invalidating all the pointers into the current copy. */
8863 *dwo_file_slot
= dwo_file
;
8867 if (dwarf2_read_debug
)
8869 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8872 dwo_file
= *dwo_file_slot
;
8874 do_cleanups (cleanups
);
8876 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8877 dwo_unit
->dwo_file
= dwo_file
;
8878 dwo_unit
->signature
= signature
;
8879 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
8880 sizeof (struct dwarf2_section_info
));
8881 *dwo_unit
->section
= sections
.info_or_types
;
8882 /* offset, length, type_offset_in_tu are set later. */
8887 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8889 static struct dwo_unit
*
8890 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8891 const struct dwp_hash_table
*htab
,
8892 const char *comp_dir
,
8893 ULONGEST signature
, int is_debug_types
)
8895 bfd
*dbfd
= dwp_file
->dbfd
;
8896 uint32_t mask
= htab
->nr_slots
- 1;
8897 uint32_t hash
= signature
& mask
;
8898 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8901 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8903 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8904 find_dwo_cu
.signature
= signature
;
8905 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8910 /* Use a for loop so that we don't loop forever on bad debug info. */
8911 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8913 ULONGEST signature_in_table
;
8915 signature_in_table
=
8916 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8917 if (signature_in_table
== signature
)
8919 uint32_t section_index
=
8920 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8922 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8923 comp_dir
, signature
, is_debug_types
);
8926 if (signature_in_table
== 0)
8928 hash
= (hash
+ hash2
) & mask
;
8931 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8936 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
8937 Open the file specified by FILE_NAME and hand it off to BFD for
8938 preliminary analysis. Return a newly initialized bfd *, which
8939 includes a canonicalized copy of FILE_NAME.
8940 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8941 In case of trouble, return NULL.
8942 NOTE: This function is derived from symfile_bfd_open. */
8945 try_open_dwop_file (const char *file_name
, int is_dwp
)
8949 char *absolute_name
;
8951 flags
= OPF_TRY_CWD_FIRST
;
8953 flags
|= OPF_SEARCH_IN_PATH
;
8954 desc
= openp (debug_file_directory
, flags
, file_name
,
8955 O_RDONLY
| O_BINARY
, &absolute_name
);
8959 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8962 xfree (absolute_name
);
8965 xfree (absolute_name
);
8966 bfd_set_cacheable (sym_bfd
, 1);
8968 if (!bfd_check_format (sym_bfd
, bfd_object
))
8970 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8977 /* Try to open DWO file FILE_NAME.
8978 COMP_DIR is the DW_AT_comp_dir attribute.
8979 The result is the bfd handle of the file.
8980 If there is a problem finding or opening the file, return NULL.
8981 Upon success, the canonicalized path of the file is stored in the bfd,
8982 same as symfile_bfd_open. */
8985 open_dwo_file (const char *file_name
, const char *comp_dir
)
8989 if (IS_ABSOLUTE_PATH (file_name
))
8990 return try_open_dwop_file (file_name
, 0 /*is_dwp*/);
8992 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8994 if (comp_dir
!= NULL
)
8996 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8998 /* NOTE: If comp_dir is a relative path, this will also try the
8999 search path, which seems useful. */
9000 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/);
9001 xfree (path_to_try
);
9006 /* That didn't work, try debug-file-directory, which, despite its name,
9007 is a list of paths. */
9009 if (*debug_file_directory
== '\0')
9012 return try_open_dwop_file (file_name
, 0 /*is_dwp*/);
9015 /* This function is mapped across the sections and remembers the offset and
9016 size of each of the DWO debugging sections we are interested in. */
9019 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
9021 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
9022 const struct dwop_section_names
*names
= &dwop_section_names
;
9024 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9026 dwo_sections
->abbrev
.asection
= sectp
;
9027 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9029 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
9031 dwo_sections
->info
.asection
= sectp
;
9032 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
9034 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9036 dwo_sections
->line
.asection
= sectp
;
9037 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
9039 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9041 dwo_sections
->loc
.asection
= sectp
;
9042 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
9044 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9046 dwo_sections
->macinfo
.asection
= sectp
;
9047 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9049 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9051 dwo_sections
->macro
.asection
= sectp
;
9052 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
9054 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
9056 dwo_sections
->str
.asection
= sectp
;
9057 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
9059 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9061 dwo_sections
->str_offsets
.asection
= sectp
;
9062 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9064 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
9066 struct dwarf2_section_info type_section
;
9068 memset (&type_section
, 0, sizeof (type_section
));
9069 type_section
.asection
= sectp
;
9070 type_section
.size
= bfd_get_section_size (sectp
);
9071 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
9076 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
9077 by PER_CU. This is for the non-DWP case.
9078 The result is NULL if DWO_NAME can't be found. */
9080 static struct dwo_file
*
9081 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
9082 const char *dwo_name
, const char *comp_dir
)
9084 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9085 struct dwo_file
*dwo_file
;
9087 struct cleanup
*cleanups
;
9089 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
9092 if (dwarf2_read_debug
)
9093 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
9096 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
9097 dwo_file
->dwo_name
= dwo_name
;
9098 dwo_file
->comp_dir
= comp_dir
;
9099 dwo_file
->dbfd
= dbfd
;
9101 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
9103 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
9105 dwo_file
->cu
= create_dwo_cu (dwo_file
);
9107 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
9108 dwo_file
->sections
.types
);
9110 discard_cleanups (cleanups
);
9112 if (dwarf2_read_debug
)
9113 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
9118 /* This function is mapped across the sections and remembers the offset and
9119 size of each of the DWP debugging sections we are interested in. */
9122 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
9124 struct dwp_file
*dwp_file
= dwp_file_ptr
;
9125 const struct dwop_section_names
*names
= &dwop_section_names
;
9126 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
9128 /* Record the ELF section number for later lookup: this is what the
9129 .debug_cu_index,.debug_tu_index tables use. */
9130 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
9131 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
9133 /* Look for specific sections that we need. */
9134 if (section_is_p (sectp
->name
, &names
->str_dwo
))
9136 dwp_file
->sections
.str
.asection
= sectp
;
9137 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
9139 else if (section_is_p (sectp
->name
, &names
->cu_index
))
9141 dwp_file
->sections
.cu_index
.asection
= sectp
;
9142 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
9144 else if (section_is_p (sectp
->name
, &names
->tu_index
))
9146 dwp_file
->sections
.tu_index
.asection
= sectp
;
9147 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
9151 /* Hash function for dwp_file loaded CUs/TUs. */
9154 hash_dwp_loaded_cutus (const void *item
)
9156 const struct dwo_unit
*dwo_unit
= item
;
9158 /* This drops the top 32 bits of the signature, but is ok for a hash. */
9159 return dwo_unit
->signature
;
9162 /* Equality function for dwp_file loaded CUs/TUs. */
9165 eq_dwp_loaded_cutus (const void *a
, const void *b
)
9167 const struct dwo_unit
*dua
= a
;
9168 const struct dwo_unit
*dub
= b
;
9170 return dua
->signature
== dub
->signature
;
9173 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
9176 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
9178 return htab_create_alloc_ex (3,
9179 hash_dwp_loaded_cutus
,
9180 eq_dwp_loaded_cutus
,
9182 &objfile
->objfile_obstack
,
9183 hashtab_obstack_allocate
,
9184 dummy_obstack_deallocate
);
9187 /* Try to open DWP file FILE_NAME.
9188 The result is the bfd handle of the file.
9189 If there is a problem finding or opening the file, return NULL.
9190 Upon success, the canonicalized path of the file is stored in the bfd,
9191 same as symfile_bfd_open. */
9194 open_dwp_file (const char *file_name
)
9196 return try_open_dwop_file (file_name
, 1 /*is_dwp*/);
9199 /* Initialize the use of the DWP file for the current objfile.
9200 By convention the name of the DWP file is ${objfile}.dwp.
9201 The result is NULL if it can't be found. */
9203 static struct dwp_file
*
9204 open_and_init_dwp_file (void)
9206 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9207 struct dwp_file
*dwp_file
;
9210 struct cleanup
*cleanups
;
9212 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
9213 cleanups
= make_cleanup (xfree
, dwp_name
);
9215 dbfd
= open_dwp_file (dwp_name
);
9218 if (dwarf2_read_debug
)
9219 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
9220 do_cleanups (cleanups
);
9223 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
9224 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
9225 dwp_name
, strlen (dwp_name
));
9226 dwp_file
->dbfd
= dbfd
;
9227 do_cleanups (cleanups
);
9229 /* +1: section 0 is unused */
9230 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
9231 dwp_file
->elf_sections
=
9232 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9233 dwp_file
->num_sections
, asection
*);
9235 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9237 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9239 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9241 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9243 if (dwarf2_read_debug
)
9245 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9246 fprintf_unfiltered (gdb_stdlog
,
9247 " %u CUs, %u TUs\n",
9248 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9249 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9255 /* Wrapper around open_and_init_dwp_file, only open it once. */
9257 static struct dwp_file
*
9260 if (! dwarf2_per_objfile
->dwp_checked
)
9262 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
9263 dwarf2_per_objfile
->dwp_checked
= 1;
9265 return dwarf2_per_objfile
->dwp_file
;
9268 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9269 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9270 or in the DWP file for the objfile, referenced by THIS_UNIT.
9271 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9272 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9274 This is called, for example, when wanting to read a variable with a
9275 complex location. Therefore we don't want to do file i/o for every call.
9276 Therefore we don't want to look for a DWO file on every call.
9277 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9278 then we check if we've already seen DWO_NAME, and only THEN do we check
9281 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9282 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9284 static struct dwo_unit
*
9285 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9286 const char *dwo_name
, const char *comp_dir
,
9287 ULONGEST signature
, int is_debug_types
)
9289 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9290 const char *kind
= is_debug_types
? "TU" : "CU";
9291 void **dwo_file_slot
;
9292 struct dwo_file
*dwo_file
;
9293 struct dwp_file
*dwp_file
;
9295 /* Have we already read SIGNATURE from a DWP file? */
9297 dwp_file
= get_dwp_file ();
9298 if (dwp_file
!= NULL
)
9300 const struct dwp_hash_table
*dwp_htab
=
9301 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9303 if (dwp_htab
!= NULL
)
9305 struct dwo_unit
*dwo_cutu
=
9306 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, comp_dir
,
9307 signature
, is_debug_types
);
9309 if (dwo_cutu
!= NULL
)
9311 if (dwarf2_read_debug
)
9313 fprintf_unfiltered (gdb_stdlog
,
9314 "Virtual DWO %s %s found: @%s\n",
9315 kind
, hex_string (signature
),
9316 host_address_to_string (dwo_cutu
));
9323 /* Have we already seen DWO_NAME? */
9325 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
9326 if (*dwo_file_slot
== NULL
)
9328 /* Read in the file and build a table of the DWOs it contains. */
9329 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
9331 /* NOTE: This will be NULL if unable to open the file. */
9332 dwo_file
= *dwo_file_slot
;
9334 if (dwo_file
!= NULL
)
9336 struct dwo_unit
*dwo_cutu
= NULL
;
9338 if (is_debug_types
&& dwo_file
->tus
)
9340 struct dwo_unit find_dwo_cutu
;
9342 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9343 find_dwo_cutu
.signature
= signature
;
9344 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
9346 else if (!is_debug_types
&& dwo_file
->cu
)
9348 if (signature
== dwo_file
->cu
->signature
)
9349 dwo_cutu
= dwo_file
->cu
;
9352 if (dwo_cutu
!= NULL
)
9354 if (dwarf2_read_debug
)
9356 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9357 kind
, dwo_name
, hex_string (signature
),
9358 host_address_to_string (dwo_cutu
));
9364 /* We didn't find it. This could mean a dwo_id mismatch, or
9365 someone deleted the DWO/DWP file, or the search path isn't set up
9366 correctly to find the file. */
9368 if (dwarf2_read_debug
)
9370 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9371 kind
, dwo_name
, hex_string (signature
));
9374 complaint (&symfile_complaints
,
9375 _("Could not find DWO %s referenced by CU at offset 0x%x"
9377 kind
, this_unit
->offset
.sect_off
, objfile
->name
);
9381 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9382 See lookup_dwo_cutu_unit for details. */
9384 static struct dwo_unit
*
9385 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9386 const char *dwo_name
, const char *comp_dir
,
9389 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9392 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9393 See lookup_dwo_cutu_unit for details. */
9395 static struct dwo_unit
*
9396 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9397 const char *dwo_name
, const char *comp_dir
)
9399 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9402 /* Free all resources associated with DWO_FILE.
9403 Close the DWO file and munmap the sections.
9404 All memory should be on the objfile obstack. */
9407 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9410 struct dwarf2_section_info
*section
;
9412 /* Note: dbfd is NULL for virtual DWO files. */
9413 gdb_bfd_unref (dwo_file
->dbfd
);
9415 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9418 /* Wrapper for free_dwo_file for use in cleanups. */
9421 free_dwo_file_cleanup (void *arg
)
9423 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9424 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9426 free_dwo_file (dwo_file
, objfile
);
9429 /* Traversal function for free_dwo_files. */
9432 free_dwo_file_from_slot (void **slot
, void *info
)
9434 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9435 struct objfile
*objfile
= (struct objfile
*) info
;
9437 free_dwo_file (dwo_file
, objfile
);
9442 /* Free all resources associated with DWO_FILES. */
9445 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9447 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9450 /* Read in various DIEs. */
9452 /* qsort helper for inherit_abstract_dies. */
9455 unsigned_int_compar (const void *ap
, const void *bp
)
9457 unsigned int a
= *(unsigned int *) ap
;
9458 unsigned int b
= *(unsigned int *) bp
;
9460 return (a
> b
) - (b
> a
);
9463 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9464 Inherit only the children of the DW_AT_abstract_origin DIE not being
9465 already referenced by DW_AT_abstract_origin from the children of the
9469 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9471 struct die_info
*child_die
;
9472 unsigned die_children_count
;
9473 /* CU offsets which were referenced by children of the current DIE. */
9474 sect_offset
*offsets
;
9475 sect_offset
*offsets_end
, *offsetp
;
9476 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9477 struct die_info
*origin_die
;
9478 /* Iterator of the ORIGIN_DIE children. */
9479 struct die_info
*origin_child_die
;
9480 struct cleanup
*cleanups
;
9481 struct attribute
*attr
;
9482 struct dwarf2_cu
*origin_cu
;
9483 struct pending
**origin_previous_list_in_scope
;
9485 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9489 /* Note that following die references may follow to a die in a
9493 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9495 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9497 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9498 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9500 if (die
->tag
!= origin_die
->tag
9501 && !(die
->tag
== DW_TAG_inlined_subroutine
9502 && origin_die
->tag
== DW_TAG_subprogram
))
9503 complaint (&symfile_complaints
,
9504 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9505 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9507 child_die
= die
->child
;
9508 die_children_count
= 0;
9509 while (child_die
&& child_die
->tag
)
9511 child_die
= sibling_die (child_die
);
9512 die_children_count
++;
9514 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9515 cleanups
= make_cleanup (xfree
, offsets
);
9517 offsets_end
= offsets
;
9518 child_die
= die
->child
;
9519 while (child_die
&& child_die
->tag
)
9521 /* For each CHILD_DIE, find the corresponding child of
9522 ORIGIN_DIE. If there is more than one layer of
9523 DW_AT_abstract_origin, follow them all; there shouldn't be,
9524 but GCC versions at least through 4.4 generate this (GCC PR
9526 struct die_info
*child_origin_die
= child_die
;
9527 struct dwarf2_cu
*child_origin_cu
= cu
;
9531 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9535 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9539 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9540 counterpart may exist. */
9541 if (child_origin_die
!= child_die
)
9543 if (child_die
->tag
!= child_origin_die
->tag
9544 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9545 && child_origin_die
->tag
== DW_TAG_subprogram
))
9546 complaint (&symfile_complaints
,
9547 _("Child DIE 0x%x and its abstract origin 0x%x have "
9548 "different tags"), child_die
->offset
.sect_off
,
9549 child_origin_die
->offset
.sect_off
);
9550 if (child_origin_die
->parent
!= origin_die
)
9551 complaint (&symfile_complaints
,
9552 _("Child DIE 0x%x and its abstract origin 0x%x have "
9553 "different parents"), child_die
->offset
.sect_off
,
9554 child_origin_die
->offset
.sect_off
);
9556 *offsets_end
++ = child_origin_die
->offset
;
9558 child_die
= sibling_die (child_die
);
9560 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9561 unsigned_int_compar
);
9562 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9563 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9564 complaint (&symfile_complaints
,
9565 _("Multiple children of DIE 0x%x refer "
9566 "to DIE 0x%x as their abstract origin"),
9567 die
->offset
.sect_off
, offsetp
->sect_off
);
9570 origin_child_die
= origin_die
->child
;
9571 while (origin_child_die
&& origin_child_die
->tag
)
9573 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9574 while (offsetp
< offsets_end
9575 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9577 if (offsetp
>= offsets_end
9578 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9580 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9581 process_die (origin_child_die
, origin_cu
);
9583 origin_child_die
= sibling_die (origin_child_die
);
9585 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9587 do_cleanups (cleanups
);
9591 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9593 struct objfile
*objfile
= cu
->objfile
;
9594 struct context_stack
*new;
9597 struct die_info
*child_die
;
9598 struct attribute
*attr
, *call_line
, *call_file
;
9601 struct block
*block
;
9602 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9603 VEC (symbolp
) *template_args
= NULL
;
9604 struct template_symbol
*templ_func
= NULL
;
9608 /* If we do not have call site information, we can't show the
9609 caller of this inlined function. That's too confusing, so
9610 only use the scope for local variables. */
9611 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9612 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9613 if (call_line
== NULL
|| call_file
== NULL
)
9615 read_lexical_block_scope (die
, cu
);
9620 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9622 name
= dwarf2_name (die
, cu
);
9624 /* Ignore functions with missing or empty names. These are actually
9625 illegal according to the DWARF standard. */
9628 complaint (&symfile_complaints
,
9629 _("missing name for subprogram DIE at %d"),
9630 die
->offset
.sect_off
);
9634 /* Ignore functions with missing or invalid low and high pc attributes. */
9635 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9637 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9638 if (!attr
|| !DW_UNSND (attr
))
9639 complaint (&symfile_complaints
,
9640 _("cannot get low and high bounds "
9641 "for subprogram DIE at %d"),
9642 die
->offset
.sect_off
);
9649 /* If we have any template arguments, then we must allocate a
9650 different sort of symbol. */
9651 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9653 if (child_die
->tag
== DW_TAG_template_type_param
9654 || child_die
->tag
== DW_TAG_template_value_param
)
9656 templ_func
= allocate_template_symbol (objfile
);
9657 templ_func
->base
.is_cplus_template_function
= 1;
9662 new = push_context (0, lowpc
);
9663 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9664 (struct symbol
*) templ_func
);
9666 /* If there is a location expression for DW_AT_frame_base, record
9668 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9670 dwarf2_symbol_mark_computed (attr
, new->name
, cu
, 1);
9672 cu
->list_in_scope
= &local_symbols
;
9674 if (die
->child
!= NULL
)
9676 child_die
= die
->child
;
9677 while (child_die
&& child_die
->tag
)
9679 if (child_die
->tag
== DW_TAG_template_type_param
9680 || child_die
->tag
== DW_TAG_template_value_param
)
9682 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9685 VEC_safe_push (symbolp
, template_args
, arg
);
9688 process_die (child_die
, cu
);
9689 child_die
= sibling_die (child_die
);
9693 inherit_abstract_dies (die
, cu
);
9695 /* If we have a DW_AT_specification, we might need to import using
9696 directives from the context of the specification DIE. See the
9697 comment in determine_prefix. */
9698 if (cu
->language
== language_cplus
9699 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9701 struct dwarf2_cu
*spec_cu
= cu
;
9702 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9706 child_die
= spec_die
->child
;
9707 while (child_die
&& child_die
->tag
)
9709 if (child_die
->tag
== DW_TAG_imported_module
)
9710 process_die (child_die
, spec_cu
);
9711 child_die
= sibling_die (child_die
);
9714 /* In some cases, GCC generates specification DIEs that
9715 themselves contain DW_AT_specification attributes. */
9716 spec_die
= die_specification (spec_die
, &spec_cu
);
9720 new = pop_context ();
9721 /* Make a block for the local symbols within. */
9722 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9723 lowpc
, highpc
, objfile
);
9725 /* For C++, set the block's scope. */
9726 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9727 && cu
->processing_has_namespace_info
)
9728 block_set_scope (block
, determine_prefix (die
, cu
),
9729 &objfile
->objfile_obstack
);
9731 /* If we have address ranges, record them. */
9732 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9734 /* Attach template arguments to function. */
9735 if (! VEC_empty (symbolp
, template_args
))
9737 gdb_assert (templ_func
!= NULL
);
9739 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9740 templ_func
->template_arguments
9741 = obstack_alloc (&objfile
->objfile_obstack
,
9742 (templ_func
->n_template_arguments
9743 * sizeof (struct symbol
*)));
9744 memcpy (templ_func
->template_arguments
,
9745 VEC_address (symbolp
, template_args
),
9746 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9747 VEC_free (symbolp
, template_args
);
9750 /* In C++, we can have functions nested inside functions (e.g., when
9751 a function declares a class that has methods). This means that
9752 when we finish processing a function scope, we may need to go
9753 back to building a containing block's symbol lists. */
9754 local_symbols
= new->locals
;
9755 using_directives
= new->using_directives
;
9757 /* If we've finished processing a top-level function, subsequent
9758 symbols go in the file symbol list. */
9759 if (outermost_context_p ())
9760 cu
->list_in_scope
= &file_symbols
;
9763 /* Process all the DIES contained within a lexical block scope. Start
9764 a new scope, process the dies, and then close the scope. */
9767 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9769 struct objfile
*objfile
= cu
->objfile
;
9770 struct context_stack
*new;
9771 CORE_ADDR lowpc
, highpc
;
9772 struct die_info
*child_die
;
9775 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9777 /* Ignore blocks with missing or invalid low and high pc attributes. */
9778 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9779 as multiple lexical blocks? Handling children in a sane way would
9780 be nasty. Might be easier to properly extend generic blocks to
9782 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9787 push_context (0, lowpc
);
9788 if (die
->child
!= NULL
)
9790 child_die
= die
->child
;
9791 while (child_die
&& child_die
->tag
)
9793 process_die (child_die
, cu
);
9794 child_die
= sibling_die (child_die
);
9797 new = pop_context ();
9799 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9802 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9805 /* Note that recording ranges after traversing children, as we
9806 do here, means that recording a parent's ranges entails
9807 walking across all its children's ranges as they appear in
9808 the address map, which is quadratic behavior.
9810 It would be nicer to record the parent's ranges before
9811 traversing its children, simply overriding whatever you find
9812 there. But since we don't even decide whether to create a
9813 block until after we've traversed its children, that's hard
9815 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9817 local_symbols
= new->locals
;
9818 using_directives
= new->using_directives
;
9821 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9824 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9826 struct objfile
*objfile
= cu
->objfile
;
9827 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9828 CORE_ADDR pc
, baseaddr
;
9829 struct attribute
*attr
;
9830 struct call_site
*call_site
, call_site_local
;
9833 struct die_info
*child_die
;
9835 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9837 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9840 complaint (&symfile_complaints
,
9841 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9842 "DIE 0x%x [in module %s]"),
9843 die
->offset
.sect_off
, objfile
->name
);
9846 pc
= DW_ADDR (attr
) + baseaddr
;
9848 if (cu
->call_site_htab
== NULL
)
9849 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9850 NULL
, &objfile
->objfile_obstack
,
9851 hashtab_obstack_allocate
, NULL
);
9852 call_site_local
.pc
= pc
;
9853 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9856 complaint (&symfile_complaints
,
9857 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9858 "DIE 0x%x [in module %s]"),
9859 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9863 /* Count parameters at the caller. */
9866 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9867 child_die
= sibling_die (child_die
))
9869 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9871 complaint (&symfile_complaints
,
9872 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9873 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9874 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9881 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9882 (sizeof (*call_site
)
9883 + (sizeof (*call_site
->parameter
)
9886 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9889 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9891 struct die_info
*func_die
;
9893 /* Skip also over DW_TAG_inlined_subroutine. */
9894 for (func_die
= die
->parent
;
9895 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9896 && func_die
->tag
!= DW_TAG_subroutine_type
;
9897 func_die
= func_die
->parent
);
9899 /* DW_AT_GNU_all_call_sites is a superset
9900 of DW_AT_GNU_all_tail_call_sites. */
9902 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9903 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9905 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9906 not complete. But keep CALL_SITE for look ups via call_site_htab,
9907 both the initial caller containing the real return address PC and
9908 the final callee containing the current PC of a chain of tail
9909 calls do not need to have the tail call list complete. But any
9910 function candidate for a virtual tail call frame searched via
9911 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9912 determined unambiguously. */
9916 struct type
*func_type
= NULL
;
9919 func_type
= get_die_type (func_die
, cu
);
9920 if (func_type
!= NULL
)
9922 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9924 /* Enlist this call site to the function. */
9925 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9926 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9929 complaint (&symfile_complaints
,
9930 _("Cannot find function owning DW_TAG_GNU_call_site "
9931 "DIE 0x%x [in module %s]"),
9932 die
->offset
.sect_off
, objfile
->name
);
9936 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9938 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9939 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9940 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9941 /* Keep NULL DWARF_BLOCK. */;
9942 else if (attr_form_is_block (attr
))
9944 struct dwarf2_locexpr_baton
*dlbaton
;
9946 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9947 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9948 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9949 dlbaton
->per_cu
= cu
->per_cu
;
9951 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9953 else if (is_ref_attr (attr
))
9955 struct dwarf2_cu
*target_cu
= cu
;
9956 struct die_info
*target_die
;
9958 target_die
= follow_die_ref (die
, attr
, &target_cu
);
9959 gdb_assert (target_cu
->objfile
== objfile
);
9960 if (die_is_declaration (target_die
, target_cu
))
9962 const char *target_physname
= NULL
;
9963 struct attribute
*target_attr
;
9965 /* Prefer the mangled name; otherwise compute the demangled one. */
9966 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
9967 if (target_attr
== NULL
)
9968 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
9970 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
9971 target_physname
= DW_STRING (target_attr
);
9973 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9974 if (target_physname
== NULL
)
9975 complaint (&symfile_complaints
,
9976 _("DW_AT_GNU_call_site_target target DIE has invalid "
9977 "physname, for referencing DIE 0x%x [in module %s]"),
9978 die
->offset
.sect_off
, objfile
->name
);
9980 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
9986 /* DW_AT_entry_pc should be preferred. */
9987 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9988 complaint (&symfile_complaints
,
9989 _("DW_AT_GNU_call_site_target target DIE has invalid "
9990 "low pc, for referencing DIE 0x%x [in module %s]"),
9991 die
->offset
.sect_off
, objfile
->name
);
9993 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9997 complaint (&symfile_complaints
,
9998 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9999 "block nor reference, for DIE 0x%x [in module %s]"),
10000 die
->offset
.sect_off
, objfile
->name
);
10002 call_site
->per_cu
= cu
->per_cu
;
10004 for (child_die
= die
->child
;
10005 child_die
&& child_die
->tag
;
10006 child_die
= sibling_die (child_die
))
10008 struct call_site_parameter
*parameter
;
10009 struct attribute
*loc
, *origin
;
10011 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
10013 /* Already printed the complaint above. */
10017 gdb_assert (call_site
->parameter_count
< nparams
);
10018 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
10020 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
10021 specifies DW_TAG_formal_parameter. Value of the data assumed for the
10022 register is contained in DW_AT_GNU_call_site_value. */
10024 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
10025 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
10026 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
10028 sect_offset offset
;
10030 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
10031 offset
= dwarf2_get_ref_die_offset (origin
);
10032 if (!offset_in_cu_p (&cu
->header
, offset
))
10034 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
10035 binding can be done only inside one CU. Such referenced DIE
10036 therefore cannot be even moved to DW_TAG_partial_unit. */
10037 complaint (&symfile_complaints
,
10038 _("DW_AT_abstract_origin offset is not in CU for "
10039 "DW_TAG_GNU_call_site child DIE 0x%x "
10041 child_die
->offset
.sect_off
, objfile
->name
);
10044 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
10045 - cu
->header
.offset
.sect_off
);
10047 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
10049 complaint (&symfile_complaints
,
10050 _("No DW_FORM_block* DW_AT_location for "
10051 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
10052 child_die
->offset
.sect_off
, objfile
->name
);
10057 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
10058 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
10059 if (parameter
->u
.dwarf_reg
!= -1)
10060 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
10061 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
10062 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
10063 ¶meter
->u
.fb_offset
))
10064 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
10067 complaint (&symfile_complaints
,
10068 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
10069 "for DW_FORM_block* DW_AT_location is supported for "
10070 "DW_TAG_GNU_call_site child DIE 0x%x "
10072 child_die
->offset
.sect_off
, objfile
->name
);
10077 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
10078 if (!attr_form_is_block (attr
))
10080 complaint (&symfile_complaints
,
10081 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
10082 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
10083 child_die
->offset
.sect_off
, objfile
->name
);
10086 parameter
->value
= DW_BLOCK (attr
)->data
;
10087 parameter
->value_size
= DW_BLOCK (attr
)->size
;
10089 /* Parameters are not pre-cleared by memset above. */
10090 parameter
->data_value
= NULL
;
10091 parameter
->data_value_size
= 0;
10092 call_site
->parameter_count
++;
10094 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
10097 if (!attr_form_is_block (attr
))
10098 complaint (&symfile_complaints
,
10099 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
10100 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
10101 child_die
->offset
.sect_off
, objfile
->name
);
10104 parameter
->data_value
= DW_BLOCK (attr
)->data
;
10105 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
10111 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
10112 Return 1 if the attributes are present and valid, otherwise, return 0.
10113 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
10116 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
10117 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
10118 struct partial_symtab
*ranges_pst
)
10120 struct objfile
*objfile
= cu
->objfile
;
10121 struct comp_unit_head
*cu_header
= &cu
->header
;
10122 bfd
*obfd
= objfile
->obfd
;
10123 unsigned int addr_size
= cu_header
->addr_size
;
10124 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10125 /* Base address selection entry. */
10128 unsigned int dummy
;
10129 const gdb_byte
*buffer
;
10133 CORE_ADDR high
= 0;
10134 CORE_ADDR baseaddr
;
10136 found_base
= cu
->base_known
;
10137 base
= cu
->base_address
;
10139 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
10140 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10142 complaint (&symfile_complaints
,
10143 _("Offset %d out of bounds for DW_AT_ranges attribute"),
10147 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10149 /* Read in the largest possible address. */
10150 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
10151 if ((marker
& mask
) == mask
)
10153 /* If we found the largest possible address, then
10154 read the base address. */
10155 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
10156 buffer
+= 2 * addr_size
;
10157 offset
+= 2 * addr_size
;
10163 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10167 CORE_ADDR range_beginning
, range_end
;
10169 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
10170 buffer
+= addr_size
;
10171 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
10172 buffer
+= addr_size
;
10173 offset
+= 2 * addr_size
;
10175 /* An end of list marker is a pair of zero addresses. */
10176 if (range_beginning
== 0 && range_end
== 0)
10177 /* Found the end of list entry. */
10180 /* Each base address selection entry is a pair of 2 values.
10181 The first is the largest possible address, the second is
10182 the base address. Check for a base address here. */
10183 if ((range_beginning
& mask
) == mask
)
10185 /* If we found the largest possible address, then
10186 read the base address. */
10187 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
10194 /* We have no valid base address for the ranges
10196 complaint (&symfile_complaints
,
10197 _("Invalid .debug_ranges data (no base address)"));
10201 if (range_beginning
> range_end
)
10203 /* Inverted range entries are invalid. */
10204 complaint (&symfile_complaints
,
10205 _("Invalid .debug_ranges data (inverted range)"));
10209 /* Empty range entries have no effect. */
10210 if (range_beginning
== range_end
)
10213 range_beginning
+= base
;
10216 /* A not-uncommon case of bad debug info.
10217 Don't pollute the addrmap with bad data. */
10218 if (range_beginning
+ baseaddr
== 0
10219 && !dwarf2_per_objfile
->has_section_at_zero
)
10221 complaint (&symfile_complaints
,
10222 _(".debug_ranges entry has start address of zero"
10223 " [in module %s]"), objfile
->name
);
10227 if (ranges_pst
!= NULL
)
10228 addrmap_set_empty (objfile
->psymtabs_addrmap
,
10229 range_beginning
+ baseaddr
,
10230 range_end
- 1 + baseaddr
,
10233 /* FIXME: This is recording everything as a low-high
10234 segment of consecutive addresses. We should have a
10235 data structure for discontiguous block ranges
10239 low
= range_beginning
;
10245 if (range_beginning
< low
)
10246 low
= range_beginning
;
10247 if (range_end
> high
)
10253 /* If the first entry is an end-of-list marker, the range
10254 describes an empty scope, i.e. no instructions. */
10260 *high_return
= high
;
10264 /* Get low and high pc attributes from a die. Return 1 if the attributes
10265 are present and valid, otherwise, return 0. Return -1 if the range is
10266 discontinuous, i.e. derived from DW_AT_ranges information. */
10269 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10270 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10271 struct partial_symtab
*pst
)
10273 struct attribute
*attr
;
10274 struct attribute
*attr_high
;
10276 CORE_ADDR high
= 0;
10279 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10282 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10285 low
= DW_ADDR (attr
);
10286 if (attr_high
->form
== DW_FORM_addr
10287 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10288 high
= DW_ADDR (attr_high
);
10290 high
= low
+ DW_UNSND (attr_high
);
10293 /* Found high w/o low attribute. */
10296 /* Found consecutive range of addresses. */
10301 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10304 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10305 We take advantage of the fact that DW_AT_ranges does not appear
10306 in DW_TAG_compile_unit of DWO files. */
10307 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10308 unsigned int ranges_offset
= (DW_UNSND (attr
)
10309 + (need_ranges_base
10313 /* Value of the DW_AT_ranges attribute is the offset in the
10314 .debug_ranges section. */
10315 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10317 /* Found discontinuous range of addresses. */
10322 /* read_partial_die has also the strict LOW < HIGH requirement. */
10326 /* When using the GNU linker, .gnu.linkonce. sections are used to
10327 eliminate duplicate copies of functions and vtables and such.
10328 The linker will arbitrarily choose one and discard the others.
10329 The AT_*_pc values for such functions refer to local labels in
10330 these sections. If the section from that file was discarded, the
10331 labels are not in the output, so the relocs get a value of 0.
10332 If this is a discarded function, mark the pc bounds as invalid,
10333 so that GDB will ignore it. */
10334 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10343 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10344 its low and high PC addresses. Do nothing if these addresses could not
10345 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10346 and HIGHPC to the high address if greater than HIGHPC. */
10349 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10350 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10351 struct dwarf2_cu
*cu
)
10353 CORE_ADDR low
, high
;
10354 struct die_info
*child
= die
->child
;
10356 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10358 *lowpc
= min (*lowpc
, low
);
10359 *highpc
= max (*highpc
, high
);
10362 /* If the language does not allow nested subprograms (either inside
10363 subprograms or lexical blocks), we're done. */
10364 if (cu
->language
!= language_ada
)
10367 /* Check all the children of the given DIE. If it contains nested
10368 subprograms, then check their pc bounds. Likewise, we need to
10369 check lexical blocks as well, as they may also contain subprogram
10371 while (child
&& child
->tag
)
10373 if (child
->tag
== DW_TAG_subprogram
10374 || child
->tag
== DW_TAG_lexical_block
)
10375 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10376 child
= sibling_die (child
);
10380 /* Get the low and high pc's represented by the scope DIE, and store
10381 them in *LOWPC and *HIGHPC. If the correct values can't be
10382 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10385 get_scope_pc_bounds (struct die_info
*die
,
10386 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10387 struct dwarf2_cu
*cu
)
10389 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10390 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10391 CORE_ADDR current_low
, current_high
;
10393 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10395 best_low
= current_low
;
10396 best_high
= current_high
;
10400 struct die_info
*child
= die
->child
;
10402 while (child
&& child
->tag
)
10404 switch (child
->tag
) {
10405 case DW_TAG_subprogram
:
10406 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10408 case DW_TAG_namespace
:
10409 case DW_TAG_module
:
10410 /* FIXME: carlton/2004-01-16: Should we do this for
10411 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10412 that current GCC's always emit the DIEs corresponding
10413 to definitions of methods of classes as children of a
10414 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10415 the DIEs giving the declarations, which could be
10416 anywhere). But I don't see any reason why the
10417 standards says that they have to be there. */
10418 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10420 if (current_low
!= ((CORE_ADDR
) -1))
10422 best_low
= min (best_low
, current_low
);
10423 best_high
= max (best_high
, current_high
);
10431 child
= sibling_die (child
);
10436 *highpc
= best_high
;
10439 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10443 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10444 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10446 struct objfile
*objfile
= cu
->objfile
;
10447 struct attribute
*attr
;
10448 struct attribute
*attr_high
;
10450 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10453 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10456 CORE_ADDR low
= DW_ADDR (attr
);
10458 if (attr_high
->form
== DW_FORM_addr
10459 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10460 high
= DW_ADDR (attr_high
);
10462 high
= low
+ DW_UNSND (attr_high
);
10464 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10468 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10471 bfd
*obfd
= objfile
->obfd
;
10472 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10473 We take advantage of the fact that DW_AT_ranges does not appear
10474 in DW_TAG_compile_unit of DWO files. */
10475 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10477 /* The value of the DW_AT_ranges attribute is the offset of the
10478 address range list in the .debug_ranges section. */
10479 unsigned long offset
= (DW_UNSND (attr
)
10480 + (need_ranges_base
? cu
->ranges_base
: 0));
10481 const gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10483 /* For some target architectures, but not others, the
10484 read_address function sign-extends the addresses it returns.
10485 To recognize base address selection entries, we need a
10487 unsigned int addr_size
= cu
->header
.addr_size
;
10488 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10490 /* The base address, to which the next pair is relative. Note
10491 that this 'base' is a DWARF concept: most entries in a range
10492 list are relative, to reduce the number of relocs against the
10493 debugging information. This is separate from this function's
10494 'baseaddr' argument, which GDB uses to relocate debugging
10495 information from a shared library based on the address at
10496 which the library was loaded. */
10497 CORE_ADDR base
= cu
->base_address
;
10498 int base_known
= cu
->base_known
;
10500 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10501 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10503 complaint (&symfile_complaints
,
10504 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10511 unsigned int bytes_read
;
10512 CORE_ADDR start
, end
;
10514 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10515 buffer
+= bytes_read
;
10516 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10517 buffer
+= bytes_read
;
10519 /* Did we find the end of the range list? */
10520 if (start
== 0 && end
== 0)
10523 /* Did we find a base address selection entry? */
10524 else if ((start
& base_select_mask
) == base_select_mask
)
10530 /* We found an ordinary address range. */
10535 complaint (&symfile_complaints
,
10536 _("Invalid .debug_ranges data "
10537 "(no base address)"));
10543 /* Inverted range entries are invalid. */
10544 complaint (&symfile_complaints
,
10545 _("Invalid .debug_ranges data "
10546 "(inverted range)"));
10550 /* Empty range entries have no effect. */
10554 start
+= base
+ baseaddr
;
10555 end
+= base
+ baseaddr
;
10557 /* A not-uncommon case of bad debug info.
10558 Don't pollute the addrmap with bad data. */
10559 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10561 complaint (&symfile_complaints
,
10562 _(".debug_ranges entry has start address of zero"
10563 " [in module %s]"), objfile
->name
);
10567 record_block_range (block
, start
, end
- 1);
10573 /* Check whether the producer field indicates either of GCC < 4.6, or the
10574 Intel C/C++ compiler, and cache the result in CU. */
10577 check_producer (struct dwarf2_cu
*cu
)
10580 int major
, minor
, release
;
10582 if (cu
->producer
== NULL
)
10584 /* For unknown compilers expect their behavior is DWARF version
10587 GCC started to support .debug_types sections by -gdwarf-4 since
10588 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10589 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10590 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10591 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10593 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10595 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10597 cs
= &cu
->producer
[strlen ("GNU ")];
10598 while (*cs
&& !isdigit (*cs
))
10600 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10602 /* Not recognized as GCC. */
10606 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10607 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10610 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10611 cu
->producer_is_icc
= 1;
10614 /* For other non-GCC compilers, expect their behavior is DWARF version
10618 cu
->checked_producer
= 1;
10621 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10622 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10623 during 4.6.0 experimental. */
10626 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10628 if (!cu
->checked_producer
)
10629 check_producer (cu
);
10631 return cu
->producer_is_gxx_lt_4_6
;
10634 /* Return the default accessibility type if it is not overriden by
10635 DW_AT_accessibility. */
10637 static enum dwarf_access_attribute
10638 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10640 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10642 /* The default DWARF 2 accessibility for members is public, the default
10643 accessibility for inheritance is private. */
10645 if (die
->tag
!= DW_TAG_inheritance
)
10646 return DW_ACCESS_public
;
10648 return DW_ACCESS_private
;
10652 /* DWARF 3+ defines the default accessibility a different way. The same
10653 rules apply now for DW_TAG_inheritance as for the members and it only
10654 depends on the container kind. */
10656 if (die
->parent
->tag
== DW_TAG_class_type
)
10657 return DW_ACCESS_private
;
10659 return DW_ACCESS_public
;
10663 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10664 offset. If the attribute was not found return 0, otherwise return
10665 1. If it was found but could not properly be handled, set *OFFSET
10669 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10672 struct attribute
*attr
;
10674 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10679 /* Note that we do not check for a section offset first here.
10680 This is because DW_AT_data_member_location is new in DWARF 4,
10681 so if we see it, we can assume that a constant form is really
10682 a constant and not a section offset. */
10683 if (attr_form_is_constant (attr
))
10684 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10685 else if (attr_form_is_section_offset (attr
))
10686 dwarf2_complex_location_expr_complaint ();
10687 else if (attr_form_is_block (attr
))
10688 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10690 dwarf2_complex_location_expr_complaint ();
10698 /* Add an aggregate field to the field list. */
10701 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10702 struct dwarf2_cu
*cu
)
10704 struct objfile
*objfile
= cu
->objfile
;
10705 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10706 struct nextfield
*new_field
;
10707 struct attribute
*attr
;
10709 const char *fieldname
= "";
10711 /* Allocate a new field list entry and link it in. */
10712 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10713 make_cleanup (xfree
, new_field
);
10714 memset (new_field
, 0, sizeof (struct nextfield
));
10716 if (die
->tag
== DW_TAG_inheritance
)
10718 new_field
->next
= fip
->baseclasses
;
10719 fip
->baseclasses
= new_field
;
10723 new_field
->next
= fip
->fields
;
10724 fip
->fields
= new_field
;
10728 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10730 new_field
->accessibility
= DW_UNSND (attr
);
10732 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10733 if (new_field
->accessibility
!= DW_ACCESS_public
)
10734 fip
->non_public_fields
= 1;
10736 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10738 new_field
->virtuality
= DW_UNSND (attr
);
10740 new_field
->virtuality
= DW_VIRTUALITY_none
;
10742 fp
= &new_field
->field
;
10744 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10748 /* Data member other than a C++ static data member. */
10750 /* Get type of field. */
10751 fp
->type
= die_type (die
, cu
);
10753 SET_FIELD_BITPOS (*fp
, 0);
10755 /* Get bit size of field (zero if none). */
10756 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10759 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10763 FIELD_BITSIZE (*fp
) = 0;
10766 /* Get bit offset of field. */
10767 if (handle_data_member_location (die
, cu
, &offset
))
10768 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10769 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10772 if (gdbarch_bits_big_endian (gdbarch
))
10774 /* For big endian bits, the DW_AT_bit_offset gives the
10775 additional bit offset from the MSB of the containing
10776 anonymous object to the MSB of the field. We don't
10777 have to do anything special since we don't need to
10778 know the size of the anonymous object. */
10779 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10783 /* For little endian bits, compute the bit offset to the
10784 MSB of the anonymous object, subtract off the number of
10785 bits from the MSB of the field to the MSB of the
10786 object, and then subtract off the number of bits of
10787 the field itself. The result is the bit offset of
10788 the LSB of the field. */
10789 int anonymous_size
;
10790 int bit_offset
= DW_UNSND (attr
);
10792 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10795 /* The size of the anonymous object containing
10796 the bit field is explicit, so use the
10797 indicated size (in bytes). */
10798 anonymous_size
= DW_UNSND (attr
);
10802 /* The size of the anonymous object containing
10803 the bit field must be inferred from the type
10804 attribute of the data member containing the
10806 anonymous_size
= TYPE_LENGTH (fp
->type
);
10808 SET_FIELD_BITPOS (*fp
,
10809 (FIELD_BITPOS (*fp
)
10810 + anonymous_size
* bits_per_byte
10811 - bit_offset
- FIELD_BITSIZE (*fp
)));
10815 /* Get name of field. */
10816 fieldname
= dwarf2_name (die
, cu
);
10817 if (fieldname
== NULL
)
10820 /* The name is already allocated along with this objfile, so we don't
10821 need to duplicate it for the type. */
10822 fp
->name
= fieldname
;
10824 /* Change accessibility for artificial fields (e.g. virtual table
10825 pointer or virtual base class pointer) to private. */
10826 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10828 FIELD_ARTIFICIAL (*fp
) = 1;
10829 new_field
->accessibility
= DW_ACCESS_private
;
10830 fip
->non_public_fields
= 1;
10833 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10835 /* C++ static member. */
10837 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10838 is a declaration, but all versions of G++ as of this writing
10839 (so through at least 3.2.1) incorrectly generate
10840 DW_TAG_variable tags. */
10842 const char *physname
;
10844 /* Get name of field. */
10845 fieldname
= dwarf2_name (die
, cu
);
10846 if (fieldname
== NULL
)
10849 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10851 /* Only create a symbol if this is an external value.
10852 new_symbol checks this and puts the value in the global symbol
10853 table, which we want. If it is not external, new_symbol
10854 will try to put the value in cu->list_in_scope which is wrong. */
10855 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10857 /* A static const member, not much different than an enum as far as
10858 we're concerned, except that we can support more types. */
10859 new_symbol (die
, NULL
, cu
);
10862 /* Get physical name. */
10863 physname
= dwarf2_physname (fieldname
, die
, cu
);
10865 /* The name is already allocated along with this objfile, so we don't
10866 need to duplicate it for the type. */
10867 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10868 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10869 FIELD_NAME (*fp
) = fieldname
;
10871 else if (die
->tag
== DW_TAG_inheritance
)
10875 /* C++ base class field. */
10876 if (handle_data_member_location (die
, cu
, &offset
))
10877 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10878 FIELD_BITSIZE (*fp
) = 0;
10879 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10880 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10881 fip
->nbaseclasses
++;
10885 /* Add a typedef defined in the scope of the FIP's class. */
10888 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10889 struct dwarf2_cu
*cu
)
10891 struct objfile
*objfile
= cu
->objfile
;
10892 struct typedef_field_list
*new_field
;
10893 struct attribute
*attr
;
10894 struct typedef_field
*fp
;
10895 char *fieldname
= "";
10897 /* Allocate a new field list entry and link it in. */
10898 new_field
= xzalloc (sizeof (*new_field
));
10899 make_cleanup (xfree
, new_field
);
10901 gdb_assert (die
->tag
== DW_TAG_typedef
);
10903 fp
= &new_field
->field
;
10905 /* Get name of field. */
10906 fp
->name
= dwarf2_name (die
, cu
);
10907 if (fp
->name
== NULL
)
10910 fp
->type
= read_type_die (die
, cu
);
10912 new_field
->next
= fip
->typedef_field_list
;
10913 fip
->typedef_field_list
= new_field
;
10914 fip
->typedef_field_list_count
++;
10917 /* Create the vector of fields, and attach it to the type. */
10920 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10921 struct dwarf2_cu
*cu
)
10923 int nfields
= fip
->nfields
;
10925 /* Record the field count, allocate space for the array of fields,
10926 and create blank accessibility bitfields if necessary. */
10927 TYPE_NFIELDS (type
) = nfields
;
10928 TYPE_FIELDS (type
) = (struct field
*)
10929 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10930 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10932 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10934 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10936 TYPE_FIELD_PRIVATE_BITS (type
) =
10937 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10938 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10940 TYPE_FIELD_PROTECTED_BITS (type
) =
10941 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10942 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10944 TYPE_FIELD_IGNORE_BITS (type
) =
10945 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10946 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10949 /* If the type has baseclasses, allocate and clear a bit vector for
10950 TYPE_FIELD_VIRTUAL_BITS. */
10951 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10953 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10954 unsigned char *pointer
;
10956 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10957 pointer
= TYPE_ALLOC (type
, num_bytes
);
10958 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10959 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10960 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10963 /* Copy the saved-up fields into the field vector. Start from the head of
10964 the list, adding to the tail of the field array, so that they end up in
10965 the same order in the array in which they were added to the list. */
10966 while (nfields
-- > 0)
10968 struct nextfield
*fieldp
;
10972 fieldp
= fip
->fields
;
10973 fip
->fields
= fieldp
->next
;
10977 fieldp
= fip
->baseclasses
;
10978 fip
->baseclasses
= fieldp
->next
;
10981 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10982 switch (fieldp
->accessibility
)
10984 case DW_ACCESS_private
:
10985 if (cu
->language
!= language_ada
)
10986 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10989 case DW_ACCESS_protected
:
10990 if (cu
->language
!= language_ada
)
10991 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10994 case DW_ACCESS_public
:
10998 /* Unknown accessibility. Complain and treat it as public. */
11000 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
11001 fieldp
->accessibility
);
11005 if (nfields
< fip
->nbaseclasses
)
11007 switch (fieldp
->virtuality
)
11009 case DW_VIRTUALITY_virtual
:
11010 case DW_VIRTUALITY_pure_virtual
:
11011 if (cu
->language
== language_ada
)
11012 error (_("unexpected virtuality in component of Ada type"));
11013 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
11020 /* Return true if this member function is a constructor, false
11024 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
11026 const char *fieldname
;
11027 const char *typename
;
11030 if (die
->parent
== NULL
)
11033 if (die
->parent
->tag
!= DW_TAG_structure_type
11034 && die
->parent
->tag
!= DW_TAG_union_type
11035 && die
->parent
->tag
!= DW_TAG_class_type
)
11038 fieldname
= dwarf2_name (die
, cu
);
11039 typename
= dwarf2_name (die
->parent
, cu
);
11040 if (fieldname
== NULL
|| typename
== NULL
)
11043 len
= strlen (fieldname
);
11044 return (strncmp (fieldname
, typename
, len
) == 0
11045 && (typename
[len
] == '\0' || typename
[len
] == '<'));
11048 /* Add a member function to the proper fieldlist. */
11051 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
11052 struct type
*type
, struct dwarf2_cu
*cu
)
11054 struct objfile
*objfile
= cu
->objfile
;
11055 struct attribute
*attr
;
11056 struct fnfieldlist
*flp
;
11058 struct fn_field
*fnp
;
11059 const char *fieldname
;
11060 struct nextfnfield
*new_fnfield
;
11061 struct type
*this_type
;
11062 enum dwarf_access_attribute accessibility
;
11064 if (cu
->language
== language_ada
)
11065 error (_("unexpected member function in Ada type"));
11067 /* Get name of member function. */
11068 fieldname
= dwarf2_name (die
, cu
);
11069 if (fieldname
== NULL
)
11072 /* Look up member function name in fieldlist. */
11073 for (i
= 0; i
< fip
->nfnfields
; i
++)
11075 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
11079 /* Create new list element if necessary. */
11080 if (i
< fip
->nfnfields
)
11081 flp
= &fip
->fnfieldlists
[i
];
11084 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11086 fip
->fnfieldlists
= (struct fnfieldlist
*)
11087 xrealloc (fip
->fnfieldlists
,
11088 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
11089 * sizeof (struct fnfieldlist
));
11090 if (fip
->nfnfields
== 0)
11091 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
11093 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
11094 flp
->name
= fieldname
;
11097 i
= fip
->nfnfields
++;
11100 /* Create a new member function field and chain it to the field list
11102 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
11103 make_cleanup (xfree
, new_fnfield
);
11104 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
11105 new_fnfield
->next
= flp
->head
;
11106 flp
->head
= new_fnfield
;
11109 /* Fill in the member function field info. */
11110 fnp
= &new_fnfield
->fnfield
;
11112 /* Delay processing of the physname until later. */
11113 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
11115 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
11120 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
11121 fnp
->physname
= physname
? physname
: "";
11124 fnp
->type
= alloc_type (objfile
);
11125 this_type
= read_type_die (die
, cu
);
11126 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
11128 int nparams
= TYPE_NFIELDS (this_type
);
11130 /* TYPE is the domain of this method, and THIS_TYPE is the type
11131 of the method itself (TYPE_CODE_METHOD). */
11132 smash_to_method_type (fnp
->type
, type
,
11133 TYPE_TARGET_TYPE (this_type
),
11134 TYPE_FIELDS (this_type
),
11135 TYPE_NFIELDS (this_type
),
11136 TYPE_VARARGS (this_type
));
11138 /* Handle static member functions.
11139 Dwarf2 has no clean way to discern C++ static and non-static
11140 member functions. G++ helps GDB by marking the first
11141 parameter for non-static member functions (which is the this
11142 pointer) as artificial. We obtain this information from
11143 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
11144 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
11145 fnp
->voffset
= VOFFSET_STATIC
;
11148 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
11149 dwarf2_full_name (fieldname
, die
, cu
));
11151 /* Get fcontext from DW_AT_containing_type if present. */
11152 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11153 fnp
->fcontext
= die_containing_type (die
, cu
);
11155 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
11156 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
11158 /* Get accessibility. */
11159 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
11161 accessibility
= DW_UNSND (attr
);
11163 accessibility
= dwarf2_default_access_attribute (die
, cu
);
11164 switch (accessibility
)
11166 case DW_ACCESS_private
:
11167 fnp
->is_private
= 1;
11169 case DW_ACCESS_protected
:
11170 fnp
->is_protected
= 1;
11174 /* Check for artificial methods. */
11175 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
11176 if (attr
&& DW_UNSND (attr
) != 0)
11177 fnp
->is_artificial
= 1;
11179 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
11181 /* Get index in virtual function table if it is a virtual member
11182 function. For older versions of GCC, this is an offset in the
11183 appropriate virtual table, as specified by DW_AT_containing_type.
11184 For everyone else, it is an expression to be evaluated relative
11185 to the object address. */
11187 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
11190 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
11192 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
11194 /* Old-style GCC. */
11195 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
11197 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11198 || (DW_BLOCK (attr
)->size
> 1
11199 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
11200 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
11202 struct dwarf_block blk
;
11205 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11207 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
11208 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
11209 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
11210 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
11211 dwarf2_complex_location_expr_complaint ();
11213 fnp
->voffset
/= cu
->header
.addr_size
;
11217 dwarf2_complex_location_expr_complaint ();
11219 if (!fnp
->fcontext
)
11220 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
11222 else if (attr_form_is_section_offset (attr
))
11224 dwarf2_complex_location_expr_complaint ();
11228 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
11234 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
11235 if (attr
&& DW_UNSND (attr
))
11237 /* GCC does this, as of 2008-08-25; PR debug/37237. */
11238 complaint (&symfile_complaints
,
11239 _("Member function \"%s\" (offset %d) is virtual "
11240 "but the vtable offset is not specified"),
11241 fieldname
, die
->offset
.sect_off
);
11242 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11243 TYPE_CPLUS_DYNAMIC (type
) = 1;
11248 /* Create the vector of member function fields, and attach it to the type. */
11251 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11252 struct dwarf2_cu
*cu
)
11254 struct fnfieldlist
*flp
;
11257 if (cu
->language
== language_ada
)
11258 error (_("unexpected member functions in Ada type"));
11260 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11261 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11262 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11264 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11266 struct nextfnfield
*nfp
= flp
->head
;
11267 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11270 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11271 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11272 fn_flp
->fn_fields
= (struct fn_field
*)
11273 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11274 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11275 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11278 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11281 /* Returns non-zero if NAME is the name of a vtable member in CU's
11282 language, zero otherwise. */
11284 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11286 static const char vptr
[] = "_vptr";
11287 static const char vtable
[] = "vtable";
11289 /* Look for the C++ and Java forms of the vtable. */
11290 if ((cu
->language
== language_java
11291 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11292 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11293 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11299 /* GCC outputs unnamed structures that are really pointers to member
11300 functions, with the ABI-specified layout. If TYPE describes
11301 such a structure, smash it into a member function type.
11303 GCC shouldn't do this; it should just output pointer to member DIEs.
11304 This is GCC PR debug/28767. */
11307 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11309 struct type
*pfn_type
, *domain_type
, *new_type
;
11311 /* Check for a structure with no name and two children. */
11312 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11315 /* Check for __pfn and __delta members. */
11316 if (TYPE_FIELD_NAME (type
, 0) == NULL
11317 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11318 || TYPE_FIELD_NAME (type
, 1) == NULL
11319 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11322 /* Find the type of the method. */
11323 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11324 if (pfn_type
== NULL
11325 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11326 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11329 /* Look for the "this" argument. */
11330 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11331 if (TYPE_NFIELDS (pfn_type
) == 0
11332 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11333 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11336 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11337 new_type
= alloc_type (objfile
);
11338 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11339 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11340 TYPE_VARARGS (pfn_type
));
11341 smash_to_methodptr_type (type
, new_type
);
11344 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11348 producer_is_icc (struct dwarf2_cu
*cu
)
11350 if (!cu
->checked_producer
)
11351 check_producer (cu
);
11353 return cu
->producer_is_icc
;
11356 /* Called when we find the DIE that starts a structure or union scope
11357 (definition) to create a type for the structure or union. Fill in
11358 the type's name and general properties; the members will not be
11359 processed until process_structure_scope.
11361 NOTE: we need to call these functions regardless of whether or not the
11362 DIE has a DW_AT_name attribute, since it might be an anonymous
11363 structure or union. This gets the type entered into our set of
11364 user defined types.
11366 However, if the structure is incomplete (an opaque struct/union)
11367 then suppress creating a symbol table entry for it since gdb only
11368 wants to find the one with the complete definition. Note that if
11369 it is complete, we just call new_symbol, which does it's own
11370 checking about whether the struct/union is anonymous or not (and
11371 suppresses creating a symbol table entry itself). */
11373 static struct type
*
11374 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11376 struct objfile
*objfile
= cu
->objfile
;
11378 struct attribute
*attr
;
11381 /* If the definition of this type lives in .debug_types, read that type.
11382 Don't follow DW_AT_specification though, that will take us back up
11383 the chain and we want to go down. */
11384 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11387 type
= get_DW_AT_signature_type (die
, attr
, cu
);
11389 /* The type's CU may not be the same as CU.
11390 Ensure TYPE is recorded with CU in die_type_hash. */
11391 return set_die_type (die
, type
, cu
);
11394 type
= alloc_type (objfile
);
11395 INIT_CPLUS_SPECIFIC (type
);
11397 name
= dwarf2_name (die
, cu
);
11400 if (cu
->language
== language_cplus
11401 || cu
->language
== language_java
)
11403 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
11405 /* dwarf2_full_name might have already finished building the DIE's
11406 type. If so, there is no need to continue. */
11407 if (get_die_type (die
, cu
) != NULL
)
11408 return get_die_type (die
, cu
);
11410 TYPE_TAG_NAME (type
) = full_name
;
11411 if (die
->tag
== DW_TAG_structure_type
11412 || die
->tag
== DW_TAG_class_type
)
11413 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11417 /* The name is already allocated along with this objfile, so
11418 we don't need to duplicate it for the type. */
11419 TYPE_TAG_NAME (type
) = name
;
11420 if (die
->tag
== DW_TAG_class_type
)
11421 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11425 if (die
->tag
== DW_TAG_structure_type
)
11427 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11429 else if (die
->tag
== DW_TAG_union_type
)
11431 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11435 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11438 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11439 TYPE_DECLARED_CLASS (type
) = 1;
11441 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11444 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11448 TYPE_LENGTH (type
) = 0;
11451 if (producer_is_icc (cu
))
11453 /* ICC does not output the required DW_AT_declaration
11454 on incomplete types, but gives them a size of zero. */
11457 TYPE_STUB_SUPPORTED (type
) = 1;
11459 if (die_is_declaration (die
, cu
))
11460 TYPE_STUB (type
) = 1;
11461 else if (attr
== NULL
&& die
->child
== NULL
11462 && producer_is_realview (cu
->producer
))
11463 /* RealView does not output the required DW_AT_declaration
11464 on incomplete types. */
11465 TYPE_STUB (type
) = 1;
11467 /* We need to add the type field to the die immediately so we don't
11468 infinitely recurse when dealing with pointers to the structure
11469 type within the structure itself. */
11470 set_die_type (die
, type
, cu
);
11472 /* set_die_type should be already done. */
11473 set_descriptive_type (type
, die
, cu
);
11478 /* Finish creating a structure or union type, including filling in
11479 its members and creating a symbol for it. */
11482 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11484 struct objfile
*objfile
= cu
->objfile
;
11485 struct die_info
*child_die
= die
->child
;
11488 type
= get_die_type (die
, cu
);
11490 type
= read_structure_type (die
, cu
);
11492 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11494 struct field_info fi
;
11495 struct die_info
*child_die
;
11496 VEC (symbolp
) *template_args
= NULL
;
11497 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11499 memset (&fi
, 0, sizeof (struct field_info
));
11501 child_die
= die
->child
;
11503 while (child_die
&& child_die
->tag
)
11505 if (child_die
->tag
== DW_TAG_member
11506 || child_die
->tag
== DW_TAG_variable
)
11508 /* NOTE: carlton/2002-11-05: A C++ static data member
11509 should be a DW_TAG_member that is a declaration, but
11510 all versions of G++ as of this writing (so through at
11511 least 3.2.1) incorrectly generate DW_TAG_variable
11512 tags for them instead. */
11513 dwarf2_add_field (&fi
, child_die
, cu
);
11515 else if (child_die
->tag
== DW_TAG_subprogram
)
11517 /* C++ member function. */
11518 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11520 else if (child_die
->tag
== DW_TAG_inheritance
)
11522 /* C++ base class field. */
11523 dwarf2_add_field (&fi
, child_die
, cu
);
11525 else if (child_die
->tag
== DW_TAG_typedef
)
11526 dwarf2_add_typedef (&fi
, child_die
, cu
);
11527 else if (child_die
->tag
== DW_TAG_template_type_param
11528 || child_die
->tag
== DW_TAG_template_value_param
)
11530 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11533 VEC_safe_push (symbolp
, template_args
, arg
);
11536 child_die
= sibling_die (child_die
);
11539 /* Attach template arguments to type. */
11540 if (! VEC_empty (symbolp
, template_args
))
11542 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11543 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11544 = VEC_length (symbolp
, template_args
);
11545 TYPE_TEMPLATE_ARGUMENTS (type
)
11546 = obstack_alloc (&objfile
->objfile_obstack
,
11547 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11548 * sizeof (struct symbol
*)));
11549 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11550 VEC_address (symbolp
, template_args
),
11551 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11552 * sizeof (struct symbol
*)));
11553 VEC_free (symbolp
, template_args
);
11556 /* Attach fields and member functions to the type. */
11558 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11561 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11563 /* Get the type which refers to the base class (possibly this
11564 class itself) which contains the vtable pointer for the current
11565 class from the DW_AT_containing_type attribute. This use of
11566 DW_AT_containing_type is a GNU extension. */
11568 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11570 struct type
*t
= die_containing_type (die
, cu
);
11572 TYPE_VPTR_BASETYPE (type
) = t
;
11577 /* Our own class provides vtbl ptr. */
11578 for (i
= TYPE_NFIELDS (t
) - 1;
11579 i
>= TYPE_N_BASECLASSES (t
);
11582 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11584 if (is_vtable_name (fieldname
, cu
))
11586 TYPE_VPTR_FIELDNO (type
) = i
;
11591 /* Complain if virtual function table field not found. */
11592 if (i
< TYPE_N_BASECLASSES (t
))
11593 complaint (&symfile_complaints
,
11594 _("virtual function table pointer "
11595 "not found when defining class '%s'"),
11596 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11601 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11604 else if (cu
->producer
11605 && strncmp (cu
->producer
,
11606 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11608 /* The IBM XLC compiler does not provide direct indication
11609 of the containing type, but the vtable pointer is
11610 always named __vfp. */
11614 for (i
= TYPE_NFIELDS (type
) - 1;
11615 i
>= TYPE_N_BASECLASSES (type
);
11618 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11620 TYPE_VPTR_FIELDNO (type
) = i
;
11621 TYPE_VPTR_BASETYPE (type
) = type
;
11628 /* Copy fi.typedef_field_list linked list elements content into the
11629 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11630 if (fi
.typedef_field_list
)
11632 int i
= fi
.typedef_field_list_count
;
11634 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11635 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11636 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11637 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11639 /* Reverse the list order to keep the debug info elements order. */
11642 struct typedef_field
*dest
, *src
;
11644 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11645 src
= &fi
.typedef_field_list
->field
;
11646 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11651 do_cleanups (back_to
);
11653 if (HAVE_CPLUS_STRUCT (type
))
11654 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11657 quirk_gcc_member_function_pointer (type
, objfile
);
11659 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11660 snapshots) has been known to create a die giving a declaration
11661 for a class that has, as a child, a die giving a definition for a
11662 nested class. So we have to process our children even if the
11663 current die is a declaration. Normally, of course, a declaration
11664 won't have any children at all. */
11666 while (child_die
!= NULL
&& child_die
->tag
)
11668 if (child_die
->tag
== DW_TAG_member
11669 || child_die
->tag
== DW_TAG_variable
11670 || child_die
->tag
== DW_TAG_inheritance
11671 || child_die
->tag
== DW_TAG_template_value_param
11672 || child_die
->tag
== DW_TAG_template_type_param
)
11677 process_die (child_die
, cu
);
11679 child_die
= sibling_die (child_die
);
11682 /* Do not consider external references. According to the DWARF standard,
11683 these DIEs are identified by the fact that they have no byte_size
11684 attribute, and a declaration attribute. */
11685 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11686 || !die_is_declaration (die
, cu
))
11687 new_symbol (die
, type
, cu
);
11690 /* Given a DW_AT_enumeration_type die, set its type. We do not
11691 complete the type's fields yet, or create any symbols. */
11693 static struct type
*
11694 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11696 struct objfile
*objfile
= cu
->objfile
;
11698 struct attribute
*attr
;
11701 /* If the definition of this type lives in .debug_types, read that type.
11702 Don't follow DW_AT_specification though, that will take us back up
11703 the chain and we want to go down. */
11704 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11707 type
= get_DW_AT_signature_type (die
, attr
, cu
);
11709 /* The type's CU may not be the same as CU.
11710 Ensure TYPE is recorded with CU in die_type_hash. */
11711 return set_die_type (die
, type
, cu
);
11714 type
= alloc_type (objfile
);
11716 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11717 name
= dwarf2_full_name (NULL
, die
, cu
);
11719 TYPE_TAG_NAME (type
) = name
;
11721 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11724 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11728 TYPE_LENGTH (type
) = 0;
11731 /* The enumeration DIE can be incomplete. In Ada, any type can be
11732 declared as private in the package spec, and then defined only
11733 inside the package body. Such types are known as Taft Amendment
11734 Types. When another package uses such a type, an incomplete DIE
11735 may be generated by the compiler. */
11736 if (die_is_declaration (die
, cu
))
11737 TYPE_STUB (type
) = 1;
11739 return set_die_type (die
, type
, cu
);
11742 /* Given a pointer to a die which begins an enumeration, process all
11743 the dies that define the members of the enumeration, and create the
11744 symbol for the enumeration type.
11746 NOTE: We reverse the order of the element list. */
11749 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11751 struct type
*this_type
;
11753 this_type
= get_die_type (die
, cu
);
11754 if (this_type
== NULL
)
11755 this_type
= read_enumeration_type (die
, cu
);
11757 if (die
->child
!= NULL
)
11759 struct die_info
*child_die
;
11760 struct symbol
*sym
;
11761 struct field
*fields
= NULL
;
11762 int num_fields
= 0;
11763 int unsigned_enum
= 1;
11768 child_die
= die
->child
;
11769 while (child_die
&& child_die
->tag
)
11771 if (child_die
->tag
!= DW_TAG_enumerator
)
11773 process_die (child_die
, cu
);
11777 name
= dwarf2_name (child_die
, cu
);
11780 sym
= new_symbol (child_die
, this_type
, cu
);
11781 if (SYMBOL_VALUE (sym
) < 0)
11786 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11789 mask
|= SYMBOL_VALUE (sym
);
11791 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11793 fields
= (struct field
*)
11795 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11796 * sizeof (struct field
));
11799 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11800 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11801 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11802 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11808 child_die
= sibling_die (child_die
);
11813 TYPE_NFIELDS (this_type
) = num_fields
;
11814 TYPE_FIELDS (this_type
) = (struct field
*)
11815 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11816 memcpy (TYPE_FIELDS (this_type
), fields
,
11817 sizeof (struct field
) * num_fields
);
11821 TYPE_UNSIGNED (this_type
) = 1;
11823 TYPE_FLAG_ENUM (this_type
) = 1;
11826 /* If we are reading an enum from a .debug_types unit, and the enum
11827 is a declaration, and the enum is not the signatured type in the
11828 unit, then we do not want to add a symbol for it. Adding a
11829 symbol would in some cases obscure the true definition of the
11830 enum, giving users an incomplete type when the definition is
11831 actually available. Note that we do not want to do this for all
11832 enums which are just declarations, because C++0x allows forward
11833 enum declarations. */
11834 if (cu
->per_cu
->is_debug_types
11835 && die_is_declaration (die
, cu
))
11837 struct signatured_type
*sig_type
;
11839 sig_type
= (struct signatured_type
*) cu
->per_cu
;
11840 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11841 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11845 new_symbol (die
, this_type
, cu
);
11848 /* Extract all information from a DW_TAG_array_type DIE and put it in
11849 the DIE's type field. For now, this only handles one dimensional
11852 static struct type
*
11853 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11855 struct objfile
*objfile
= cu
->objfile
;
11856 struct die_info
*child_die
;
11858 struct type
*element_type
, *range_type
, *index_type
;
11859 struct type
**range_types
= NULL
;
11860 struct attribute
*attr
;
11862 struct cleanup
*back_to
;
11865 element_type
= die_type (die
, cu
);
11867 /* The die_type call above may have already set the type for this DIE. */
11868 type
= get_die_type (die
, cu
);
11872 /* Irix 6.2 native cc creates array types without children for
11873 arrays with unspecified length. */
11874 if (die
->child
== NULL
)
11876 index_type
= objfile_type (objfile
)->builtin_int
;
11877 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11878 type
= create_array_type (NULL
, element_type
, range_type
);
11879 return set_die_type (die
, type
, cu
);
11882 back_to
= make_cleanup (null_cleanup
, NULL
);
11883 child_die
= die
->child
;
11884 while (child_die
&& child_die
->tag
)
11886 if (child_die
->tag
== DW_TAG_subrange_type
)
11888 struct type
*child_type
= read_type_die (child_die
, cu
);
11890 if (child_type
!= NULL
)
11892 /* The range type was succesfully read. Save it for the
11893 array type creation. */
11894 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11896 range_types
= (struct type
**)
11897 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11898 * sizeof (struct type
*));
11900 make_cleanup (free_current_contents
, &range_types
);
11902 range_types
[ndim
++] = child_type
;
11905 child_die
= sibling_die (child_die
);
11908 /* Dwarf2 dimensions are output from left to right, create the
11909 necessary array types in backwards order. */
11911 type
= element_type
;
11913 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11918 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11923 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11926 /* Understand Dwarf2 support for vector types (like they occur on
11927 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11928 array type. This is not part of the Dwarf2/3 standard yet, but a
11929 custom vendor extension. The main difference between a regular
11930 array and the vector variant is that vectors are passed by value
11932 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11934 make_vector_type (type
);
11936 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11937 implementation may choose to implement triple vectors using this
11939 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11942 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11943 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11945 complaint (&symfile_complaints
,
11946 _("DW_AT_byte_size for array type smaller "
11947 "than the total size of elements"));
11950 name
= dwarf2_name (die
, cu
);
11952 TYPE_NAME (type
) = name
;
11954 /* Install the type in the die. */
11955 set_die_type (die
, type
, cu
);
11957 /* set_die_type should be already done. */
11958 set_descriptive_type (type
, die
, cu
);
11960 do_cleanups (back_to
);
11965 static enum dwarf_array_dim_ordering
11966 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11968 struct attribute
*attr
;
11970 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11972 if (attr
) return DW_SND (attr
);
11974 /* GNU F77 is a special case, as at 08/2004 array type info is the
11975 opposite order to the dwarf2 specification, but data is still
11976 laid out as per normal fortran.
11978 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11979 version checking. */
11981 if (cu
->language
== language_fortran
11982 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11984 return DW_ORD_row_major
;
11987 switch (cu
->language_defn
->la_array_ordering
)
11989 case array_column_major
:
11990 return DW_ORD_col_major
;
11991 case array_row_major
:
11993 return DW_ORD_row_major
;
11997 /* Extract all information from a DW_TAG_set_type DIE and put it in
11998 the DIE's type field. */
12000 static struct type
*
12001 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12003 struct type
*domain_type
, *set_type
;
12004 struct attribute
*attr
;
12006 domain_type
= die_type (die
, cu
);
12008 /* The die_type call above may have already set the type for this DIE. */
12009 set_type
= get_die_type (die
, cu
);
12013 set_type
= create_set_type (NULL
, domain_type
);
12015 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12017 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
12019 return set_die_type (die
, set_type
, cu
);
12022 /* A helper for read_common_block that creates a locexpr baton.
12023 SYM is the symbol which we are marking as computed.
12024 COMMON_DIE is the DIE for the common block.
12025 COMMON_LOC is the location expression attribute for the common
12027 MEMBER_LOC is the location expression attribute for the particular
12028 member of the common block that we are processing.
12029 CU is the CU from which the above come. */
12032 mark_common_block_symbol_computed (struct symbol
*sym
,
12033 struct die_info
*common_die
,
12034 struct attribute
*common_loc
,
12035 struct attribute
*member_loc
,
12036 struct dwarf2_cu
*cu
)
12038 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12039 struct dwarf2_locexpr_baton
*baton
;
12041 unsigned int cu_off
;
12042 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
12043 LONGEST offset
= 0;
12045 gdb_assert (common_loc
&& member_loc
);
12046 gdb_assert (attr_form_is_block (common_loc
));
12047 gdb_assert (attr_form_is_block (member_loc
)
12048 || attr_form_is_constant (member_loc
));
12050 baton
= obstack_alloc (&objfile
->objfile_obstack
,
12051 sizeof (struct dwarf2_locexpr_baton
));
12052 baton
->per_cu
= cu
->per_cu
;
12053 gdb_assert (baton
->per_cu
);
12055 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
12057 if (attr_form_is_constant (member_loc
))
12059 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
12060 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
12063 baton
->size
+= DW_BLOCK (member_loc
)->size
;
12065 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
12068 *ptr
++ = DW_OP_call4
;
12069 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
12070 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
12073 if (attr_form_is_constant (member_loc
))
12075 *ptr
++ = DW_OP_addr
;
12076 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
12077 ptr
+= cu
->header
.addr_size
;
12081 /* We have to copy the data here, because DW_OP_call4 will only
12082 use a DW_AT_location attribute. */
12083 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
12084 ptr
+= DW_BLOCK (member_loc
)->size
;
12087 *ptr
++ = DW_OP_plus
;
12088 gdb_assert (ptr
- baton
->data
== baton
->size
);
12090 SYMBOL_LOCATION_BATON (sym
) = baton
;
12091 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
12094 /* Create appropriate locally-scoped variables for all the
12095 DW_TAG_common_block entries. Also create a struct common_block
12096 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
12097 is used to sepate the common blocks name namespace from regular
12101 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
12103 struct attribute
*attr
;
12105 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
12108 /* Support the .debug_loc offsets. */
12109 if (attr_form_is_block (attr
))
12113 else if (attr_form_is_section_offset (attr
))
12115 dwarf2_complex_location_expr_complaint ();
12120 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
12121 "common block member");
12126 if (die
->child
!= NULL
)
12128 struct objfile
*objfile
= cu
->objfile
;
12129 struct die_info
*child_die
;
12130 size_t n_entries
= 0, size
;
12131 struct common_block
*common_block
;
12132 struct symbol
*sym
;
12134 for (child_die
= die
->child
;
12135 child_die
&& child_die
->tag
;
12136 child_die
= sibling_die (child_die
))
12139 size
= (sizeof (struct common_block
)
12140 + (n_entries
- 1) * sizeof (struct symbol
*));
12141 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
12142 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
12143 common_block
->n_entries
= 0;
12145 for (child_die
= die
->child
;
12146 child_die
&& child_die
->tag
;
12147 child_die
= sibling_die (child_die
))
12149 /* Create the symbol in the DW_TAG_common_block block in the current
12151 sym
= new_symbol (child_die
, NULL
, cu
);
12154 struct attribute
*member_loc
;
12156 common_block
->contents
[common_block
->n_entries
++] = sym
;
12158 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
12162 /* GDB has handled this for a long time, but it is
12163 not specified by DWARF. It seems to have been
12164 emitted by gfortran at least as recently as:
12165 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
12166 complaint (&symfile_complaints
,
12167 _("Variable in common block has "
12168 "DW_AT_data_member_location "
12169 "- DIE at 0x%x [in module %s]"),
12170 child_die
->offset
.sect_off
, cu
->objfile
->name
);
12172 if (attr_form_is_section_offset (member_loc
))
12173 dwarf2_complex_location_expr_complaint ();
12174 else if (attr_form_is_constant (member_loc
)
12175 || attr_form_is_block (member_loc
))
12178 mark_common_block_symbol_computed (sym
, die
, attr
,
12182 dwarf2_complex_location_expr_complaint ();
12187 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
12188 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
12192 /* Create a type for a C++ namespace. */
12194 static struct type
*
12195 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12197 struct objfile
*objfile
= cu
->objfile
;
12198 const char *previous_prefix
, *name
;
12202 /* For extensions, reuse the type of the original namespace. */
12203 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
12205 struct die_info
*ext_die
;
12206 struct dwarf2_cu
*ext_cu
= cu
;
12208 ext_die
= dwarf2_extension (die
, &ext_cu
);
12209 type
= read_type_die (ext_die
, ext_cu
);
12211 /* EXT_CU may not be the same as CU.
12212 Ensure TYPE is recorded with CU in die_type_hash. */
12213 return set_die_type (die
, type
, cu
);
12216 name
= namespace_name (die
, &is_anonymous
, cu
);
12218 /* Now build the name of the current namespace. */
12220 previous_prefix
= determine_prefix (die
, cu
);
12221 if (previous_prefix
[0] != '\0')
12222 name
= typename_concat (&objfile
->objfile_obstack
,
12223 previous_prefix
, name
, 0, cu
);
12225 /* Create the type. */
12226 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12228 TYPE_NAME (type
) = name
;
12229 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12231 return set_die_type (die
, type
, cu
);
12234 /* Read a C++ namespace. */
12237 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12239 struct objfile
*objfile
= cu
->objfile
;
12242 /* Add a symbol associated to this if we haven't seen the namespace
12243 before. Also, add a using directive if it's an anonymous
12246 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12250 type
= read_type_die (die
, cu
);
12251 new_symbol (die
, type
, cu
);
12253 namespace_name (die
, &is_anonymous
, cu
);
12256 const char *previous_prefix
= determine_prefix (die
, cu
);
12258 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12259 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
12263 if (die
->child
!= NULL
)
12265 struct die_info
*child_die
= die
->child
;
12267 while (child_die
&& child_die
->tag
)
12269 process_die (child_die
, cu
);
12270 child_die
= sibling_die (child_die
);
12275 /* Read a Fortran module as type. This DIE can be only a declaration used for
12276 imported module. Still we need that type as local Fortran "use ... only"
12277 declaration imports depend on the created type in determine_prefix. */
12279 static struct type
*
12280 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12282 struct objfile
*objfile
= cu
->objfile
;
12283 const char *module_name
;
12286 module_name
= dwarf2_name (die
, cu
);
12288 complaint (&symfile_complaints
,
12289 _("DW_TAG_module has no name, offset 0x%x"),
12290 die
->offset
.sect_off
);
12291 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12293 /* determine_prefix uses TYPE_TAG_NAME. */
12294 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12296 return set_die_type (die
, type
, cu
);
12299 /* Read a Fortran module. */
12302 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12304 struct die_info
*child_die
= die
->child
;
12306 while (child_die
&& child_die
->tag
)
12308 process_die (child_die
, cu
);
12309 child_die
= sibling_die (child_die
);
12313 /* Return the name of the namespace represented by DIE. Set
12314 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12317 static const char *
12318 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12320 struct die_info
*current_die
;
12321 const char *name
= NULL
;
12323 /* Loop through the extensions until we find a name. */
12325 for (current_die
= die
;
12326 current_die
!= NULL
;
12327 current_die
= dwarf2_extension (die
, &cu
))
12329 name
= dwarf2_name (current_die
, cu
);
12334 /* Is it an anonymous namespace? */
12336 *is_anonymous
= (name
== NULL
);
12338 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12343 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12344 the user defined type vector. */
12346 static struct type
*
12347 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12349 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12350 struct comp_unit_head
*cu_header
= &cu
->header
;
12352 struct attribute
*attr_byte_size
;
12353 struct attribute
*attr_address_class
;
12354 int byte_size
, addr_class
;
12355 struct type
*target_type
;
12357 target_type
= die_type (die
, cu
);
12359 /* The die_type call above may have already set the type for this DIE. */
12360 type
= get_die_type (die
, cu
);
12364 type
= lookup_pointer_type (target_type
);
12366 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12367 if (attr_byte_size
)
12368 byte_size
= DW_UNSND (attr_byte_size
);
12370 byte_size
= cu_header
->addr_size
;
12372 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12373 if (attr_address_class
)
12374 addr_class
= DW_UNSND (attr_address_class
);
12376 addr_class
= DW_ADDR_none
;
12378 /* If the pointer size or address class is different than the
12379 default, create a type variant marked as such and set the
12380 length accordingly. */
12381 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12383 if (gdbarch_address_class_type_flags_p (gdbarch
))
12387 type_flags
= gdbarch_address_class_type_flags
12388 (gdbarch
, byte_size
, addr_class
);
12389 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12391 type
= make_type_with_address_space (type
, type_flags
);
12393 else if (TYPE_LENGTH (type
) != byte_size
)
12395 complaint (&symfile_complaints
,
12396 _("invalid pointer size %d"), byte_size
);
12400 /* Should we also complain about unhandled address classes? */
12404 TYPE_LENGTH (type
) = byte_size
;
12405 return set_die_type (die
, type
, cu
);
12408 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12409 the user defined type vector. */
12411 static struct type
*
12412 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12415 struct type
*to_type
;
12416 struct type
*domain
;
12418 to_type
= die_type (die
, cu
);
12419 domain
= die_containing_type (die
, cu
);
12421 /* The calls above may have already set the type for this DIE. */
12422 type
= get_die_type (die
, cu
);
12426 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12427 type
= lookup_methodptr_type (to_type
);
12428 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
12430 struct type
*new_type
= alloc_type (cu
->objfile
);
12432 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
12433 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
12434 TYPE_VARARGS (to_type
));
12435 type
= lookup_methodptr_type (new_type
);
12438 type
= lookup_memberptr_type (to_type
, domain
);
12440 return set_die_type (die
, type
, cu
);
12443 /* Extract all information from a DW_TAG_reference_type DIE and add to
12444 the user defined type vector. */
12446 static struct type
*
12447 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12449 struct comp_unit_head
*cu_header
= &cu
->header
;
12450 struct type
*type
, *target_type
;
12451 struct attribute
*attr
;
12453 target_type
= die_type (die
, cu
);
12455 /* The die_type call above may have already set the type for this DIE. */
12456 type
= get_die_type (die
, cu
);
12460 type
= lookup_reference_type (target_type
);
12461 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12464 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12468 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12470 return set_die_type (die
, type
, cu
);
12473 static struct type
*
12474 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12476 struct type
*base_type
, *cv_type
;
12478 base_type
= die_type (die
, cu
);
12480 /* The die_type call above may have already set the type for this DIE. */
12481 cv_type
= get_die_type (die
, cu
);
12485 /* In case the const qualifier is applied to an array type, the element type
12486 is so qualified, not the array type (section 6.7.3 of C99). */
12487 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12489 struct type
*el_type
, *inner_array
;
12491 base_type
= copy_type (base_type
);
12492 inner_array
= base_type
;
12494 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12496 TYPE_TARGET_TYPE (inner_array
) =
12497 copy_type (TYPE_TARGET_TYPE (inner_array
));
12498 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12501 el_type
= TYPE_TARGET_TYPE (inner_array
);
12502 TYPE_TARGET_TYPE (inner_array
) =
12503 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12505 return set_die_type (die
, base_type
, cu
);
12508 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12509 return set_die_type (die
, cv_type
, cu
);
12512 static struct type
*
12513 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12515 struct type
*base_type
, *cv_type
;
12517 base_type
= die_type (die
, cu
);
12519 /* The die_type call above may have already set the type for this DIE. */
12520 cv_type
= get_die_type (die
, cu
);
12524 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12525 return set_die_type (die
, cv_type
, cu
);
12528 /* Handle DW_TAG_restrict_type. */
12530 static struct type
*
12531 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12533 struct type
*base_type
, *cv_type
;
12535 base_type
= die_type (die
, cu
);
12537 /* The die_type call above may have already set the type for this DIE. */
12538 cv_type
= get_die_type (die
, cu
);
12542 cv_type
= make_restrict_type (base_type
);
12543 return set_die_type (die
, cv_type
, cu
);
12546 /* Extract all information from a DW_TAG_string_type DIE and add to
12547 the user defined type vector. It isn't really a user defined type,
12548 but it behaves like one, with other DIE's using an AT_user_def_type
12549 attribute to reference it. */
12551 static struct type
*
12552 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12554 struct objfile
*objfile
= cu
->objfile
;
12555 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12556 struct type
*type
, *range_type
, *index_type
, *char_type
;
12557 struct attribute
*attr
;
12558 unsigned int length
;
12560 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12563 length
= DW_UNSND (attr
);
12567 /* Check for the DW_AT_byte_size attribute. */
12568 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12571 length
= DW_UNSND (attr
);
12579 index_type
= objfile_type (objfile
)->builtin_int
;
12580 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12581 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12582 type
= create_string_type (NULL
, char_type
, range_type
);
12584 return set_die_type (die
, type
, cu
);
12587 /* Handle DIES due to C code like:
12591 int (*funcp)(int a, long l);
12595 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12597 static struct type
*
12598 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12600 struct objfile
*objfile
= cu
->objfile
;
12601 struct type
*type
; /* Type that this function returns. */
12602 struct type
*ftype
; /* Function that returns above type. */
12603 struct attribute
*attr
;
12605 type
= die_type (die
, cu
);
12607 /* The die_type call above may have already set the type for this DIE. */
12608 ftype
= get_die_type (die
, cu
);
12612 ftype
= lookup_function_type (type
);
12614 /* All functions in C++, Pascal and Java have prototypes. */
12615 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12616 if ((attr
&& (DW_UNSND (attr
) != 0))
12617 || cu
->language
== language_cplus
12618 || cu
->language
== language_java
12619 || cu
->language
== language_pascal
)
12620 TYPE_PROTOTYPED (ftype
) = 1;
12621 else if (producer_is_realview (cu
->producer
))
12622 /* RealView does not emit DW_AT_prototyped. We can not
12623 distinguish prototyped and unprototyped functions; default to
12624 prototyped, since that is more common in modern code (and
12625 RealView warns about unprototyped functions). */
12626 TYPE_PROTOTYPED (ftype
) = 1;
12628 /* Store the calling convention in the type if it's available in
12629 the subroutine die. Otherwise set the calling convention to
12630 the default value DW_CC_normal. */
12631 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12633 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12634 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12635 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12637 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12639 /* We need to add the subroutine type to the die immediately so
12640 we don't infinitely recurse when dealing with parameters
12641 declared as the same subroutine type. */
12642 set_die_type (die
, ftype
, cu
);
12644 if (die
->child
!= NULL
)
12646 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12647 struct die_info
*child_die
;
12648 int nparams
, iparams
;
12650 /* Count the number of parameters.
12651 FIXME: GDB currently ignores vararg functions, but knows about
12652 vararg member functions. */
12654 child_die
= die
->child
;
12655 while (child_die
&& child_die
->tag
)
12657 if (child_die
->tag
== DW_TAG_formal_parameter
)
12659 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12660 TYPE_VARARGS (ftype
) = 1;
12661 child_die
= sibling_die (child_die
);
12664 /* Allocate storage for parameters and fill them in. */
12665 TYPE_NFIELDS (ftype
) = nparams
;
12666 TYPE_FIELDS (ftype
) = (struct field
*)
12667 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12669 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12670 even if we error out during the parameters reading below. */
12671 for (iparams
= 0; iparams
< nparams
; iparams
++)
12672 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12675 child_die
= die
->child
;
12676 while (child_die
&& child_die
->tag
)
12678 if (child_die
->tag
== DW_TAG_formal_parameter
)
12680 struct type
*arg_type
;
12682 /* DWARF version 2 has no clean way to discern C++
12683 static and non-static member functions. G++ helps
12684 GDB by marking the first parameter for non-static
12685 member functions (which is the this pointer) as
12686 artificial. We pass this information to
12687 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12689 DWARF version 3 added DW_AT_object_pointer, which GCC
12690 4.5 does not yet generate. */
12691 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12693 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12696 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12698 /* GCC/43521: In java, the formal parameter
12699 "this" is sometimes not marked with DW_AT_artificial. */
12700 if (cu
->language
== language_java
)
12702 const char *name
= dwarf2_name (child_die
, cu
);
12704 if (name
&& !strcmp (name
, "this"))
12705 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12708 arg_type
= die_type (child_die
, cu
);
12710 /* RealView does not mark THIS as const, which the testsuite
12711 expects. GCC marks THIS as const in method definitions,
12712 but not in the class specifications (GCC PR 43053). */
12713 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12714 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12717 struct dwarf2_cu
*arg_cu
= cu
;
12718 const char *name
= dwarf2_name (child_die
, cu
);
12720 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12723 /* If the compiler emits this, use it. */
12724 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12727 else if (name
&& strcmp (name
, "this") == 0)
12728 /* Function definitions will have the argument names. */
12730 else if (name
== NULL
&& iparams
== 0)
12731 /* Declarations may not have the names, so like
12732 elsewhere in GDB, assume an artificial first
12733 argument is "this". */
12737 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12741 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12744 child_die
= sibling_die (child_die
);
12751 static struct type
*
12752 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12754 struct objfile
*objfile
= cu
->objfile
;
12755 const char *name
= NULL
;
12756 struct type
*this_type
, *target_type
;
12758 name
= dwarf2_full_name (NULL
, die
, cu
);
12759 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12760 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12761 TYPE_NAME (this_type
) = name
;
12762 set_die_type (die
, this_type
, cu
);
12763 target_type
= die_type (die
, cu
);
12764 if (target_type
!= this_type
)
12765 TYPE_TARGET_TYPE (this_type
) = target_type
;
12768 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12769 spec and cause infinite loops in GDB. */
12770 complaint (&symfile_complaints
,
12771 _("Self-referential DW_TAG_typedef "
12772 "- DIE at 0x%x [in module %s]"),
12773 die
->offset
.sect_off
, objfile
->name
);
12774 TYPE_TARGET_TYPE (this_type
) = NULL
;
12779 /* Find a representation of a given base type and install
12780 it in the TYPE field of the die. */
12782 static struct type
*
12783 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12785 struct objfile
*objfile
= cu
->objfile
;
12787 struct attribute
*attr
;
12788 int encoding
= 0, size
= 0;
12790 enum type_code code
= TYPE_CODE_INT
;
12791 int type_flags
= 0;
12792 struct type
*target_type
= NULL
;
12794 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12797 encoding
= DW_UNSND (attr
);
12799 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12802 size
= DW_UNSND (attr
);
12804 name
= dwarf2_name (die
, cu
);
12807 complaint (&symfile_complaints
,
12808 _("DW_AT_name missing from DW_TAG_base_type"));
12813 case DW_ATE_address
:
12814 /* Turn DW_ATE_address into a void * pointer. */
12815 code
= TYPE_CODE_PTR
;
12816 type_flags
|= TYPE_FLAG_UNSIGNED
;
12817 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12819 case DW_ATE_boolean
:
12820 code
= TYPE_CODE_BOOL
;
12821 type_flags
|= TYPE_FLAG_UNSIGNED
;
12823 case DW_ATE_complex_float
:
12824 code
= TYPE_CODE_COMPLEX
;
12825 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12827 case DW_ATE_decimal_float
:
12828 code
= TYPE_CODE_DECFLOAT
;
12831 code
= TYPE_CODE_FLT
;
12833 case DW_ATE_signed
:
12835 case DW_ATE_unsigned
:
12836 type_flags
|= TYPE_FLAG_UNSIGNED
;
12837 if (cu
->language
== language_fortran
12839 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12840 code
= TYPE_CODE_CHAR
;
12842 case DW_ATE_signed_char
:
12843 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12844 || cu
->language
== language_pascal
12845 || cu
->language
== language_fortran
)
12846 code
= TYPE_CODE_CHAR
;
12848 case DW_ATE_unsigned_char
:
12849 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12850 || cu
->language
== language_pascal
12851 || cu
->language
== language_fortran
)
12852 code
= TYPE_CODE_CHAR
;
12853 type_flags
|= TYPE_FLAG_UNSIGNED
;
12856 /* We just treat this as an integer and then recognize the
12857 type by name elsewhere. */
12861 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12862 dwarf_type_encoding_name (encoding
));
12866 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12867 TYPE_NAME (type
) = name
;
12868 TYPE_TARGET_TYPE (type
) = target_type
;
12870 if (name
&& strcmp (name
, "char") == 0)
12871 TYPE_NOSIGN (type
) = 1;
12873 return set_die_type (die
, type
, cu
);
12876 /* Read the given DW_AT_subrange DIE. */
12878 static struct type
*
12879 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12881 struct type
*base_type
, *orig_base_type
;
12882 struct type
*range_type
;
12883 struct attribute
*attr
;
12885 int low_default_is_valid
;
12887 LONGEST negative_mask
;
12889 orig_base_type
= die_type (die
, cu
);
12890 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
12891 whereas the real type might be. So, we use ORIG_BASE_TYPE when
12892 creating the range type, but we use the result of check_typedef
12893 when examining properties of the type. */
12894 base_type
= check_typedef (orig_base_type
);
12896 /* The die_type call above may have already set the type for this DIE. */
12897 range_type
= get_die_type (die
, cu
);
12901 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12902 omitting DW_AT_lower_bound. */
12903 switch (cu
->language
)
12906 case language_cplus
:
12908 low_default_is_valid
= 1;
12910 case language_fortran
:
12912 low_default_is_valid
= 1;
12915 case language_java
:
12916 case language_objc
:
12918 low_default_is_valid
= (cu
->header
.version
>= 4);
12922 case language_pascal
:
12924 low_default_is_valid
= (cu
->header
.version
>= 4);
12928 low_default_is_valid
= 0;
12932 /* FIXME: For variable sized arrays either of these could be
12933 a variable rather than a constant value. We'll allow it,
12934 but we don't know how to handle it. */
12935 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12937 low
= dwarf2_get_attr_constant_value (attr
, low
);
12938 else if (!low_default_is_valid
)
12939 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12940 "- DIE at 0x%x [in module %s]"),
12941 die
->offset
.sect_off
, cu
->objfile
->name
);
12943 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12946 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12948 /* GCC encodes arrays with unspecified or dynamic length
12949 with a DW_FORM_block1 attribute or a reference attribute.
12950 FIXME: GDB does not yet know how to handle dynamic
12951 arrays properly, treat them as arrays with unspecified
12954 FIXME: jimb/2003-09-22: GDB does not really know
12955 how to handle arrays of unspecified length
12956 either; we just represent them as zero-length
12957 arrays. Choose an appropriate upper bound given
12958 the lower bound we've computed above. */
12962 high
= dwarf2_get_attr_constant_value (attr
, 1);
12966 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12969 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12970 high
= low
+ count
- 1;
12974 /* Unspecified array length. */
12979 /* Dwarf-2 specifications explicitly allows to create subrange types
12980 without specifying a base type.
12981 In that case, the base type must be set to the type of
12982 the lower bound, upper bound or count, in that order, if any of these
12983 three attributes references an object that has a type.
12984 If no base type is found, the Dwarf-2 specifications say that
12985 a signed integer type of size equal to the size of an address should
12987 For the following C code: `extern char gdb_int [];'
12988 GCC produces an empty range DIE.
12989 FIXME: muller/2010-05-28: Possible references to object for low bound,
12990 high bound or count are not yet handled by this code. */
12991 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12993 struct objfile
*objfile
= cu
->objfile
;
12994 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12995 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12996 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12998 /* Test "int", "long int", and "long long int" objfile types,
12999 and select the first one having a size above or equal to the
13000 architecture address size. */
13001 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
13002 base_type
= int_type
;
13005 int_type
= objfile_type (objfile
)->builtin_long
;
13006 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
13007 base_type
= int_type
;
13010 int_type
= objfile_type (objfile
)->builtin_long_long
;
13011 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
13012 base_type
= int_type
;
13018 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
13019 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
13020 low
|= negative_mask
;
13021 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
13022 high
|= negative_mask
;
13024 range_type
= create_range_type (NULL
, orig_base_type
, low
, high
);
13026 /* Mark arrays with dynamic length at least as an array of unspecified
13027 length. GDB could check the boundary but before it gets implemented at
13028 least allow accessing the array elements. */
13029 if (attr
&& attr_form_is_block (attr
))
13030 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
13032 /* Ada expects an empty array on no boundary attributes. */
13033 if (attr
== NULL
&& cu
->language
!= language_ada
)
13034 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
13036 name
= dwarf2_name (die
, cu
);
13038 TYPE_NAME (range_type
) = name
;
13040 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13042 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
13044 set_die_type (die
, range_type
, cu
);
13046 /* set_die_type should be already done. */
13047 set_descriptive_type (range_type
, die
, cu
);
13052 static struct type
*
13053 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13057 /* For now, we only support the C meaning of an unspecified type: void. */
13059 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
13060 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
13062 return set_die_type (die
, type
, cu
);
13065 /* Read a single die and all its descendents. Set the die's sibling
13066 field to NULL; set other fields in the die correctly, and set all
13067 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
13068 location of the info_ptr after reading all of those dies. PARENT
13069 is the parent of the die in question. */
13071 static struct die_info
*
13072 read_die_and_children (const struct die_reader_specs
*reader
,
13073 const gdb_byte
*info_ptr
,
13074 const gdb_byte
**new_info_ptr
,
13075 struct die_info
*parent
)
13077 struct die_info
*die
;
13078 const gdb_byte
*cur_ptr
;
13081 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
13084 *new_info_ptr
= cur_ptr
;
13087 store_in_ref_table (die
, reader
->cu
);
13090 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
13094 *new_info_ptr
= cur_ptr
;
13097 die
->sibling
= NULL
;
13098 die
->parent
= parent
;
13102 /* Read a die, all of its descendents, and all of its siblings; set
13103 all of the fields of all of the dies correctly. Arguments are as
13104 in read_die_and_children. */
13106 static struct die_info
*
13107 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
13108 const gdb_byte
*info_ptr
,
13109 const gdb_byte
**new_info_ptr
,
13110 struct die_info
*parent
)
13112 struct die_info
*first_die
, *last_sibling
;
13113 const gdb_byte
*cur_ptr
;
13115 cur_ptr
= info_ptr
;
13116 first_die
= last_sibling
= NULL
;
13120 struct die_info
*die
13121 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
13125 *new_info_ptr
= cur_ptr
;
13132 last_sibling
->sibling
= die
;
13134 last_sibling
= die
;
13138 /* Read a die, all of its descendents, and all of its siblings; set
13139 all of the fields of all of the dies correctly. Arguments are as
13140 in read_die_and_children.
13141 This the main entry point for reading a DIE and all its children. */
13143 static struct die_info
*
13144 read_die_and_siblings (const struct die_reader_specs
*reader
,
13145 const gdb_byte
*info_ptr
,
13146 const gdb_byte
**new_info_ptr
,
13147 struct die_info
*parent
)
13149 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
13150 new_info_ptr
, parent
);
13152 if (dwarf2_die_debug
)
13154 fprintf_unfiltered (gdb_stdlog
,
13155 "Read die from %s@0x%x of %s:\n",
13156 bfd_section_name (reader
->abfd
,
13157 reader
->die_section
->asection
),
13158 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
13159 bfd_get_filename (reader
->abfd
));
13160 dump_die (die
, dwarf2_die_debug
);
13166 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
13168 The caller is responsible for filling in the extra attributes
13169 and updating (*DIEP)->num_attrs.
13170 Set DIEP to point to a newly allocated die with its information,
13171 except for its child, sibling, and parent fields.
13172 Set HAS_CHILDREN to tell whether the die has children or not. */
13174 static const gdb_byte
*
13175 read_full_die_1 (const struct die_reader_specs
*reader
,
13176 struct die_info
**diep
, const gdb_byte
*info_ptr
,
13177 int *has_children
, int num_extra_attrs
)
13179 unsigned int abbrev_number
, bytes_read
, i
;
13180 sect_offset offset
;
13181 struct abbrev_info
*abbrev
;
13182 struct die_info
*die
;
13183 struct dwarf2_cu
*cu
= reader
->cu
;
13184 bfd
*abfd
= reader
->abfd
;
13186 offset
.sect_off
= info_ptr
- reader
->buffer
;
13187 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13188 info_ptr
+= bytes_read
;
13189 if (!abbrev_number
)
13196 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
13198 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
13200 bfd_get_filename (abfd
));
13202 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
13203 die
->offset
= offset
;
13204 die
->tag
= abbrev
->tag
;
13205 die
->abbrev
= abbrev_number
;
13207 /* Make the result usable.
13208 The caller needs to update num_attrs after adding the extra
13210 die
->num_attrs
= abbrev
->num_attrs
;
13212 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13213 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
13217 *has_children
= abbrev
->has_children
;
13221 /* Read a die and all its attributes.
13222 Set DIEP to point to a newly allocated die with its information,
13223 except for its child, sibling, and parent fields.
13224 Set HAS_CHILDREN to tell whether the die has children or not. */
13226 static const gdb_byte
*
13227 read_full_die (const struct die_reader_specs
*reader
,
13228 struct die_info
**diep
, const gdb_byte
*info_ptr
,
13231 const gdb_byte
*result
;
13233 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
13235 if (dwarf2_die_debug
)
13237 fprintf_unfiltered (gdb_stdlog
,
13238 "Read die from %s@0x%x of %s:\n",
13239 bfd_section_name (reader
->abfd
,
13240 reader
->die_section
->asection
),
13241 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
13242 bfd_get_filename (reader
->abfd
));
13243 dump_die (*diep
, dwarf2_die_debug
);
13249 /* Abbreviation tables.
13251 In DWARF version 2, the description of the debugging information is
13252 stored in a separate .debug_abbrev section. Before we read any
13253 dies from a section we read in all abbreviations and install them
13254 in a hash table. */
13256 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
13258 static struct abbrev_info
*
13259 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
13261 struct abbrev_info
*abbrev
;
13263 abbrev
= (struct abbrev_info
*)
13264 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
13265 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13269 /* Add an abbreviation to the table. */
13272 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
13273 unsigned int abbrev_number
,
13274 struct abbrev_info
*abbrev
)
13276 unsigned int hash_number
;
13278 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13279 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
13280 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
13283 /* Look up an abbrev in the table.
13284 Returns NULL if the abbrev is not found. */
13286 static struct abbrev_info
*
13287 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
13288 unsigned int abbrev_number
)
13290 unsigned int hash_number
;
13291 struct abbrev_info
*abbrev
;
13293 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13294 abbrev
= abbrev_table
->abbrevs
[hash_number
];
13298 if (abbrev
->number
== abbrev_number
)
13300 abbrev
= abbrev
->next
;
13305 /* Read in an abbrev table. */
13307 static struct abbrev_table
*
13308 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13309 sect_offset offset
)
13311 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13312 bfd
*abfd
= section
->asection
->owner
;
13313 struct abbrev_table
*abbrev_table
;
13314 const gdb_byte
*abbrev_ptr
;
13315 struct abbrev_info
*cur_abbrev
;
13316 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13317 unsigned int abbrev_form
;
13318 struct attr_abbrev
*cur_attrs
;
13319 unsigned int allocated_attrs
;
13321 abbrev_table
= XMALLOC (struct abbrev_table
);
13322 abbrev_table
->offset
= offset
;
13323 obstack_init (&abbrev_table
->abbrev_obstack
);
13324 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13326 * sizeof (struct abbrev_info
*)));
13327 memset (abbrev_table
->abbrevs
, 0,
13328 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13330 dwarf2_read_section (objfile
, section
);
13331 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13332 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13333 abbrev_ptr
+= bytes_read
;
13335 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13336 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13338 /* Loop until we reach an abbrev number of 0. */
13339 while (abbrev_number
)
13341 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13343 /* read in abbrev header */
13344 cur_abbrev
->number
= abbrev_number
;
13345 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13346 abbrev_ptr
+= bytes_read
;
13347 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13350 /* now read in declarations */
13351 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13352 abbrev_ptr
+= bytes_read
;
13353 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13354 abbrev_ptr
+= bytes_read
;
13355 while (abbrev_name
)
13357 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13359 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13361 = xrealloc (cur_attrs
, (allocated_attrs
13362 * sizeof (struct attr_abbrev
)));
13365 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13366 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13367 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13368 abbrev_ptr
+= bytes_read
;
13369 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13370 abbrev_ptr
+= bytes_read
;
13373 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13374 (cur_abbrev
->num_attrs
13375 * sizeof (struct attr_abbrev
)));
13376 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13377 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13379 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13381 /* Get next abbreviation.
13382 Under Irix6 the abbreviations for a compilation unit are not
13383 always properly terminated with an abbrev number of 0.
13384 Exit loop if we encounter an abbreviation which we have
13385 already read (which means we are about to read the abbreviations
13386 for the next compile unit) or if the end of the abbreviation
13387 table is reached. */
13388 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13390 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13391 abbrev_ptr
+= bytes_read
;
13392 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13397 return abbrev_table
;
13400 /* Free the resources held by ABBREV_TABLE. */
13403 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13405 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13406 xfree (abbrev_table
);
13409 /* Same as abbrev_table_free but as a cleanup.
13410 We pass in a pointer to the pointer to the table so that we can
13411 set the pointer to NULL when we're done. It also simplifies
13412 build_type_unit_groups. */
13415 abbrev_table_free_cleanup (void *table_ptr
)
13417 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13419 if (*abbrev_table_ptr
!= NULL
)
13420 abbrev_table_free (*abbrev_table_ptr
);
13421 *abbrev_table_ptr
= NULL
;
13424 /* Read the abbrev table for CU from ABBREV_SECTION. */
13427 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13428 struct dwarf2_section_info
*abbrev_section
)
13431 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13434 /* Release the memory used by the abbrev table for a compilation unit. */
13437 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13439 struct dwarf2_cu
*cu
= ptr_to_cu
;
13441 abbrev_table_free (cu
->abbrev_table
);
13442 /* Set this to NULL so that we SEGV if we try to read it later,
13443 and also because free_comp_unit verifies this is NULL. */
13444 cu
->abbrev_table
= NULL
;
13447 /* Returns nonzero if TAG represents a type that we might generate a partial
13451 is_type_tag_for_partial (int tag
)
13456 /* Some types that would be reasonable to generate partial symbols for,
13457 that we don't at present. */
13458 case DW_TAG_array_type
:
13459 case DW_TAG_file_type
:
13460 case DW_TAG_ptr_to_member_type
:
13461 case DW_TAG_set_type
:
13462 case DW_TAG_string_type
:
13463 case DW_TAG_subroutine_type
:
13465 case DW_TAG_base_type
:
13466 case DW_TAG_class_type
:
13467 case DW_TAG_interface_type
:
13468 case DW_TAG_enumeration_type
:
13469 case DW_TAG_structure_type
:
13470 case DW_TAG_subrange_type
:
13471 case DW_TAG_typedef
:
13472 case DW_TAG_union_type
:
13479 /* Load all DIEs that are interesting for partial symbols into memory. */
13481 static struct partial_die_info
*
13482 load_partial_dies (const struct die_reader_specs
*reader
,
13483 const gdb_byte
*info_ptr
, int building_psymtab
)
13485 struct dwarf2_cu
*cu
= reader
->cu
;
13486 struct objfile
*objfile
= cu
->objfile
;
13487 struct partial_die_info
*part_die
;
13488 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13489 struct abbrev_info
*abbrev
;
13490 unsigned int bytes_read
;
13491 unsigned int load_all
= 0;
13492 int nesting_level
= 1;
13497 gdb_assert (cu
->per_cu
!= NULL
);
13498 if (cu
->per_cu
->load_all_dies
)
13502 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13506 &cu
->comp_unit_obstack
,
13507 hashtab_obstack_allocate
,
13508 dummy_obstack_deallocate
);
13510 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13511 sizeof (struct partial_die_info
));
13515 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13517 /* A NULL abbrev means the end of a series of children. */
13518 if (abbrev
== NULL
)
13520 if (--nesting_level
== 0)
13522 /* PART_DIE was probably the last thing allocated on the
13523 comp_unit_obstack, so we could call obstack_free
13524 here. We don't do that because the waste is small,
13525 and will be cleaned up when we're done with this
13526 compilation unit. This way, we're also more robust
13527 against other users of the comp_unit_obstack. */
13530 info_ptr
+= bytes_read
;
13531 last_die
= parent_die
;
13532 parent_die
= parent_die
->die_parent
;
13536 /* Check for template arguments. We never save these; if
13537 they're seen, we just mark the parent, and go on our way. */
13538 if (parent_die
!= NULL
13539 && cu
->language
== language_cplus
13540 && (abbrev
->tag
== DW_TAG_template_type_param
13541 || abbrev
->tag
== DW_TAG_template_value_param
))
13543 parent_die
->has_template_arguments
= 1;
13547 /* We don't need a partial DIE for the template argument. */
13548 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13553 /* We only recurse into c++ subprograms looking for template arguments.
13554 Skip their other children. */
13556 && cu
->language
== language_cplus
13557 && parent_die
!= NULL
13558 && parent_die
->tag
== DW_TAG_subprogram
)
13560 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13564 /* Check whether this DIE is interesting enough to save. Normally
13565 we would not be interested in members here, but there may be
13566 later variables referencing them via DW_AT_specification (for
13567 static members). */
13569 && !is_type_tag_for_partial (abbrev
->tag
)
13570 && abbrev
->tag
!= DW_TAG_constant
13571 && abbrev
->tag
!= DW_TAG_enumerator
13572 && abbrev
->tag
!= DW_TAG_subprogram
13573 && abbrev
->tag
!= DW_TAG_lexical_block
13574 && abbrev
->tag
!= DW_TAG_variable
13575 && abbrev
->tag
!= DW_TAG_namespace
13576 && abbrev
->tag
!= DW_TAG_module
13577 && abbrev
->tag
!= DW_TAG_member
13578 && abbrev
->tag
!= DW_TAG_imported_unit
)
13580 /* Otherwise we skip to the next sibling, if any. */
13581 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13585 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13588 /* This two-pass algorithm for processing partial symbols has a
13589 high cost in cache pressure. Thus, handle some simple cases
13590 here which cover the majority of C partial symbols. DIEs
13591 which neither have specification tags in them, nor could have
13592 specification tags elsewhere pointing at them, can simply be
13593 processed and discarded.
13595 This segment is also optional; scan_partial_symbols and
13596 add_partial_symbol will handle these DIEs if we chain
13597 them in normally. When compilers which do not emit large
13598 quantities of duplicate debug information are more common,
13599 this code can probably be removed. */
13601 /* Any complete simple types at the top level (pretty much all
13602 of them, for a language without namespaces), can be processed
13604 if (parent_die
== NULL
13605 && part_die
->has_specification
== 0
13606 && part_die
->is_declaration
== 0
13607 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13608 || part_die
->tag
== DW_TAG_base_type
13609 || part_die
->tag
== DW_TAG_subrange_type
))
13611 if (building_psymtab
&& part_die
->name
!= NULL
)
13612 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13613 VAR_DOMAIN
, LOC_TYPEDEF
,
13614 &objfile
->static_psymbols
,
13615 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13616 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13620 /* The exception for DW_TAG_typedef with has_children above is
13621 a workaround of GCC PR debug/47510. In the case of this complaint
13622 type_name_no_tag_or_error will error on such types later.
13624 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13625 it could not find the child DIEs referenced later, this is checked
13626 above. In correct DWARF DW_TAG_typedef should have no children. */
13628 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13629 complaint (&symfile_complaints
,
13630 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13631 "- DIE at 0x%x [in module %s]"),
13632 part_die
->offset
.sect_off
, objfile
->name
);
13634 /* If we're at the second level, and we're an enumerator, and
13635 our parent has no specification (meaning possibly lives in a
13636 namespace elsewhere), then we can add the partial symbol now
13637 instead of queueing it. */
13638 if (part_die
->tag
== DW_TAG_enumerator
13639 && parent_die
!= NULL
13640 && parent_die
->die_parent
== NULL
13641 && parent_die
->tag
== DW_TAG_enumeration_type
13642 && parent_die
->has_specification
== 0)
13644 if (part_die
->name
== NULL
)
13645 complaint (&symfile_complaints
,
13646 _("malformed enumerator DIE ignored"));
13647 else if (building_psymtab
)
13648 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13649 VAR_DOMAIN
, LOC_CONST
,
13650 (cu
->language
== language_cplus
13651 || cu
->language
== language_java
)
13652 ? &objfile
->global_psymbols
13653 : &objfile
->static_psymbols
,
13654 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13656 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13660 /* We'll save this DIE so link it in. */
13661 part_die
->die_parent
= parent_die
;
13662 part_die
->die_sibling
= NULL
;
13663 part_die
->die_child
= NULL
;
13665 if (last_die
&& last_die
== parent_die
)
13666 last_die
->die_child
= part_die
;
13668 last_die
->die_sibling
= part_die
;
13670 last_die
= part_die
;
13672 if (first_die
== NULL
)
13673 first_die
= part_die
;
13675 /* Maybe add the DIE to the hash table. Not all DIEs that we
13676 find interesting need to be in the hash table, because we
13677 also have the parent/sibling/child chains; only those that we
13678 might refer to by offset later during partial symbol reading.
13680 For now this means things that might have be the target of a
13681 DW_AT_specification, DW_AT_abstract_origin, or
13682 DW_AT_extension. DW_AT_extension will refer only to
13683 namespaces; DW_AT_abstract_origin refers to functions (and
13684 many things under the function DIE, but we do not recurse
13685 into function DIEs during partial symbol reading) and
13686 possibly variables as well; DW_AT_specification refers to
13687 declarations. Declarations ought to have the DW_AT_declaration
13688 flag. It happens that GCC forgets to put it in sometimes, but
13689 only for functions, not for types.
13691 Adding more things than necessary to the hash table is harmless
13692 except for the performance cost. Adding too few will result in
13693 wasted time in find_partial_die, when we reread the compilation
13694 unit with load_all_dies set. */
13697 || abbrev
->tag
== DW_TAG_constant
13698 || abbrev
->tag
== DW_TAG_subprogram
13699 || abbrev
->tag
== DW_TAG_variable
13700 || abbrev
->tag
== DW_TAG_namespace
13701 || part_die
->is_declaration
)
13705 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13706 part_die
->offset
.sect_off
, INSERT
);
13710 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13711 sizeof (struct partial_die_info
));
13713 /* For some DIEs we want to follow their children (if any). For C
13714 we have no reason to follow the children of structures; for other
13715 languages we have to, so that we can get at method physnames
13716 to infer fully qualified class names, for DW_AT_specification,
13717 and for C++ template arguments. For C++, we also look one level
13718 inside functions to find template arguments (if the name of the
13719 function does not already contain the template arguments).
13721 For Ada, we need to scan the children of subprograms and lexical
13722 blocks as well because Ada allows the definition of nested
13723 entities that could be interesting for the debugger, such as
13724 nested subprograms for instance. */
13725 if (last_die
->has_children
13727 || last_die
->tag
== DW_TAG_namespace
13728 || last_die
->tag
== DW_TAG_module
13729 || last_die
->tag
== DW_TAG_enumeration_type
13730 || (cu
->language
== language_cplus
13731 && last_die
->tag
== DW_TAG_subprogram
13732 && (last_die
->name
== NULL
13733 || strchr (last_die
->name
, '<') == NULL
))
13734 || (cu
->language
!= language_c
13735 && (last_die
->tag
== DW_TAG_class_type
13736 || last_die
->tag
== DW_TAG_interface_type
13737 || last_die
->tag
== DW_TAG_structure_type
13738 || last_die
->tag
== DW_TAG_union_type
))
13739 || (cu
->language
== language_ada
13740 && (last_die
->tag
== DW_TAG_subprogram
13741 || last_die
->tag
== DW_TAG_lexical_block
))))
13744 parent_die
= last_die
;
13748 /* Otherwise we skip to the next sibling, if any. */
13749 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13751 /* Back to the top, do it again. */
13755 /* Read a minimal amount of information into the minimal die structure. */
13757 static const gdb_byte
*
13758 read_partial_die (const struct die_reader_specs
*reader
,
13759 struct partial_die_info
*part_die
,
13760 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13761 const gdb_byte
*info_ptr
)
13763 struct dwarf2_cu
*cu
= reader
->cu
;
13764 struct objfile
*objfile
= cu
->objfile
;
13765 const gdb_byte
*buffer
= reader
->buffer
;
13767 struct attribute attr
;
13768 int has_low_pc_attr
= 0;
13769 int has_high_pc_attr
= 0;
13770 int high_pc_relative
= 0;
13772 memset (part_die
, 0, sizeof (struct partial_die_info
));
13774 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13776 info_ptr
+= abbrev_len
;
13778 if (abbrev
== NULL
)
13781 part_die
->tag
= abbrev
->tag
;
13782 part_die
->has_children
= abbrev
->has_children
;
13784 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13786 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13788 /* Store the data if it is of an attribute we want to keep in a
13789 partial symbol table. */
13793 switch (part_die
->tag
)
13795 case DW_TAG_compile_unit
:
13796 case DW_TAG_partial_unit
:
13797 case DW_TAG_type_unit
:
13798 /* Compilation units have a DW_AT_name that is a filename, not
13799 a source language identifier. */
13800 case DW_TAG_enumeration_type
:
13801 case DW_TAG_enumerator
:
13802 /* These tags always have simple identifiers already; no need
13803 to canonicalize them. */
13804 part_die
->name
= DW_STRING (&attr
);
13808 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13809 &objfile
->objfile_obstack
);
13813 case DW_AT_linkage_name
:
13814 case DW_AT_MIPS_linkage_name
:
13815 /* Note that both forms of linkage name might appear. We
13816 assume they will be the same, and we only store the last
13818 if (cu
->language
== language_ada
)
13819 part_die
->name
= DW_STRING (&attr
);
13820 part_die
->linkage_name
= DW_STRING (&attr
);
13823 has_low_pc_attr
= 1;
13824 part_die
->lowpc
= DW_ADDR (&attr
);
13826 case DW_AT_high_pc
:
13827 has_high_pc_attr
= 1;
13828 if (attr
.form
== DW_FORM_addr
13829 || attr
.form
== DW_FORM_GNU_addr_index
)
13830 part_die
->highpc
= DW_ADDR (&attr
);
13833 high_pc_relative
= 1;
13834 part_die
->highpc
= DW_UNSND (&attr
);
13837 case DW_AT_location
:
13838 /* Support the .debug_loc offsets. */
13839 if (attr_form_is_block (&attr
))
13841 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13843 else if (attr_form_is_section_offset (&attr
))
13845 dwarf2_complex_location_expr_complaint ();
13849 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13850 "partial symbol information");
13853 case DW_AT_external
:
13854 part_die
->is_external
= DW_UNSND (&attr
);
13856 case DW_AT_declaration
:
13857 part_die
->is_declaration
= DW_UNSND (&attr
);
13860 part_die
->has_type
= 1;
13862 case DW_AT_abstract_origin
:
13863 case DW_AT_specification
:
13864 case DW_AT_extension
:
13865 part_die
->has_specification
= 1;
13866 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13867 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13868 || cu
->per_cu
->is_dwz
);
13870 case DW_AT_sibling
:
13871 /* Ignore absolute siblings, they might point outside of
13872 the current compile unit. */
13873 if (attr
.form
== DW_FORM_ref_addr
)
13874 complaint (&symfile_complaints
,
13875 _("ignoring absolute DW_AT_sibling"));
13877 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13879 case DW_AT_byte_size
:
13880 part_die
->has_byte_size
= 1;
13882 case DW_AT_calling_convention
:
13883 /* DWARF doesn't provide a way to identify a program's source-level
13884 entry point. DW_AT_calling_convention attributes are only meant
13885 to describe functions' calling conventions.
13887 However, because it's a necessary piece of information in
13888 Fortran, and because DW_CC_program is the only piece of debugging
13889 information whose definition refers to a 'main program' at all,
13890 several compilers have begun marking Fortran main programs with
13891 DW_CC_program --- even when those functions use the standard
13892 calling conventions.
13894 So until DWARF specifies a way to provide this information and
13895 compilers pick up the new representation, we'll support this
13897 if (DW_UNSND (&attr
) == DW_CC_program
13898 && cu
->language
== language_fortran
)
13900 set_main_name (part_die
->name
);
13902 /* As this DIE has a static linkage the name would be difficult
13903 to look up later. */
13904 language_of_main
= language_fortran
;
13908 if (DW_UNSND (&attr
) == DW_INL_inlined
13909 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13910 part_die
->may_be_inlined
= 1;
13914 if (part_die
->tag
== DW_TAG_imported_unit
)
13916 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13917 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13918 || cu
->per_cu
->is_dwz
);
13927 if (high_pc_relative
)
13928 part_die
->highpc
+= part_die
->lowpc
;
13930 if (has_low_pc_attr
&& has_high_pc_attr
)
13932 /* When using the GNU linker, .gnu.linkonce. sections are used to
13933 eliminate duplicate copies of functions and vtables and such.
13934 The linker will arbitrarily choose one and discard the others.
13935 The AT_*_pc values for such functions refer to local labels in
13936 these sections. If the section from that file was discarded, the
13937 labels are not in the output, so the relocs get a value of 0.
13938 If this is a discarded function, mark the pc bounds as invalid,
13939 so that GDB will ignore it. */
13940 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13942 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13944 complaint (&symfile_complaints
,
13945 _("DW_AT_low_pc %s is zero "
13946 "for DIE at 0x%x [in module %s]"),
13947 paddress (gdbarch
, part_die
->lowpc
),
13948 part_die
->offset
.sect_off
, objfile
->name
);
13950 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13951 else if (part_die
->lowpc
>= part_die
->highpc
)
13953 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13955 complaint (&symfile_complaints
,
13956 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13957 "for DIE at 0x%x [in module %s]"),
13958 paddress (gdbarch
, part_die
->lowpc
),
13959 paddress (gdbarch
, part_die
->highpc
),
13960 part_die
->offset
.sect_off
, objfile
->name
);
13963 part_die
->has_pc_info
= 1;
13969 /* Find a cached partial DIE at OFFSET in CU. */
13971 static struct partial_die_info
*
13972 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13974 struct partial_die_info
*lookup_die
= NULL
;
13975 struct partial_die_info part_die
;
13977 part_die
.offset
= offset
;
13978 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13984 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13985 except in the case of .debug_types DIEs which do not reference
13986 outside their CU (they do however referencing other types via
13987 DW_FORM_ref_sig8). */
13989 static struct partial_die_info
*
13990 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13992 struct objfile
*objfile
= cu
->objfile
;
13993 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13994 struct partial_die_info
*pd
= NULL
;
13996 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13997 && offset_in_cu_p (&cu
->header
, offset
))
13999 pd
= find_partial_die_in_comp_unit (offset
, cu
);
14002 /* We missed recording what we needed.
14003 Load all dies and try again. */
14004 per_cu
= cu
->per_cu
;
14008 /* TUs don't reference other CUs/TUs (except via type signatures). */
14009 if (cu
->per_cu
->is_debug_types
)
14011 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
14012 " external reference to offset 0x%lx [in module %s].\n"),
14013 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
14014 bfd_get_filename (objfile
->obfd
));
14016 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
14019 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
14020 load_partial_comp_unit (per_cu
);
14022 per_cu
->cu
->last_used
= 0;
14023 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
14026 /* If we didn't find it, and not all dies have been loaded,
14027 load them all and try again. */
14029 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
14031 per_cu
->load_all_dies
= 1;
14033 /* This is nasty. When we reread the DIEs, somewhere up the call chain
14034 THIS_CU->cu may already be in use. So we can't just free it and
14035 replace its DIEs with the ones we read in. Instead, we leave those
14036 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
14037 and clobber THIS_CU->cu->partial_dies with the hash table for the new
14039 load_partial_comp_unit (per_cu
);
14041 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
14045 internal_error (__FILE__
, __LINE__
,
14046 _("could not find partial DIE 0x%x "
14047 "in cache [from module %s]\n"),
14048 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
14052 /* See if we can figure out if the class lives in a namespace. We do
14053 this by looking for a member function; its demangled name will
14054 contain namespace info, if there is any. */
14057 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
14058 struct dwarf2_cu
*cu
)
14060 /* NOTE: carlton/2003-10-07: Getting the info this way changes
14061 what template types look like, because the demangler
14062 frequently doesn't give the same name as the debug info. We
14063 could fix this by only using the demangled name to get the
14064 prefix (but see comment in read_structure_type). */
14066 struct partial_die_info
*real_pdi
;
14067 struct partial_die_info
*child_pdi
;
14069 /* If this DIE (this DIE's specification, if any) has a parent, then
14070 we should not do this. We'll prepend the parent's fully qualified
14071 name when we create the partial symbol. */
14073 real_pdi
= struct_pdi
;
14074 while (real_pdi
->has_specification
)
14075 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
14076 real_pdi
->spec_is_dwz
, cu
);
14078 if (real_pdi
->die_parent
!= NULL
)
14081 for (child_pdi
= struct_pdi
->die_child
;
14083 child_pdi
= child_pdi
->die_sibling
)
14085 if (child_pdi
->tag
== DW_TAG_subprogram
14086 && child_pdi
->linkage_name
!= NULL
)
14088 char *actual_class_name
14089 = language_class_name_from_physname (cu
->language_defn
,
14090 child_pdi
->linkage_name
);
14091 if (actual_class_name
!= NULL
)
14094 = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
14096 strlen (actual_class_name
));
14097 xfree (actual_class_name
);
14104 /* Adjust PART_DIE before generating a symbol for it. This function
14105 may set the is_external flag or change the DIE's name. */
14108 fixup_partial_die (struct partial_die_info
*part_die
,
14109 struct dwarf2_cu
*cu
)
14111 /* Once we've fixed up a die, there's no point in doing so again.
14112 This also avoids a memory leak if we were to call
14113 guess_partial_die_structure_name multiple times. */
14114 if (part_die
->fixup_called
)
14117 /* If we found a reference attribute and the DIE has no name, try
14118 to find a name in the referred to DIE. */
14120 if (part_die
->name
== NULL
&& part_die
->has_specification
)
14122 struct partial_die_info
*spec_die
;
14124 spec_die
= find_partial_die (part_die
->spec_offset
,
14125 part_die
->spec_is_dwz
, cu
);
14127 fixup_partial_die (spec_die
, cu
);
14129 if (spec_die
->name
)
14131 part_die
->name
= spec_die
->name
;
14133 /* Copy DW_AT_external attribute if it is set. */
14134 if (spec_die
->is_external
)
14135 part_die
->is_external
= spec_die
->is_external
;
14139 /* Set default names for some unnamed DIEs. */
14141 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
14142 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
14144 /* If there is no parent die to provide a namespace, and there are
14145 children, see if we can determine the namespace from their linkage
14147 if (cu
->language
== language_cplus
14148 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
14149 && part_die
->die_parent
== NULL
14150 && part_die
->has_children
14151 && (part_die
->tag
== DW_TAG_class_type
14152 || part_die
->tag
== DW_TAG_structure_type
14153 || part_die
->tag
== DW_TAG_union_type
))
14154 guess_partial_die_structure_name (part_die
, cu
);
14156 /* GCC might emit a nameless struct or union that has a linkage
14157 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14158 if (part_die
->name
== NULL
14159 && (part_die
->tag
== DW_TAG_class_type
14160 || part_die
->tag
== DW_TAG_interface_type
14161 || part_die
->tag
== DW_TAG_structure_type
14162 || part_die
->tag
== DW_TAG_union_type
)
14163 && part_die
->linkage_name
!= NULL
)
14167 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
14172 /* Strip any leading namespaces/classes, keep only the base name.
14173 DW_AT_name for named DIEs does not contain the prefixes. */
14174 base
= strrchr (demangled
, ':');
14175 if (base
&& base
> demangled
&& base
[-1] == ':')
14180 part_die
->name
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
14181 base
, strlen (base
));
14186 part_die
->fixup_called
= 1;
14189 /* Read an attribute value described by an attribute form. */
14191 static const gdb_byte
*
14192 read_attribute_value (const struct die_reader_specs
*reader
,
14193 struct attribute
*attr
, unsigned form
,
14194 const gdb_byte
*info_ptr
)
14196 struct dwarf2_cu
*cu
= reader
->cu
;
14197 bfd
*abfd
= reader
->abfd
;
14198 struct comp_unit_head
*cu_header
= &cu
->header
;
14199 unsigned int bytes_read
;
14200 struct dwarf_block
*blk
;
14205 case DW_FORM_ref_addr
:
14206 if (cu
->header
.version
== 2)
14207 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
14209 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
14210 &cu
->header
, &bytes_read
);
14211 info_ptr
+= bytes_read
;
14213 case DW_FORM_GNU_ref_alt
:
14214 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14215 info_ptr
+= bytes_read
;
14218 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
14219 info_ptr
+= bytes_read
;
14221 case DW_FORM_block2
:
14222 blk
= dwarf_alloc_block (cu
);
14223 blk
->size
= read_2_bytes (abfd
, info_ptr
);
14225 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14226 info_ptr
+= blk
->size
;
14227 DW_BLOCK (attr
) = blk
;
14229 case DW_FORM_block4
:
14230 blk
= dwarf_alloc_block (cu
);
14231 blk
->size
= read_4_bytes (abfd
, info_ptr
);
14233 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14234 info_ptr
+= blk
->size
;
14235 DW_BLOCK (attr
) = blk
;
14237 case DW_FORM_data2
:
14238 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
14241 case DW_FORM_data4
:
14242 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
14245 case DW_FORM_data8
:
14246 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
14249 case DW_FORM_sec_offset
:
14250 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14251 info_ptr
+= bytes_read
;
14253 case DW_FORM_string
:
14254 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
14255 DW_STRING_IS_CANONICAL (attr
) = 0;
14256 info_ptr
+= bytes_read
;
14259 if (!cu
->per_cu
->is_dwz
)
14261 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
14263 DW_STRING_IS_CANONICAL (attr
) = 0;
14264 info_ptr
+= bytes_read
;
14268 case DW_FORM_GNU_strp_alt
:
14270 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14271 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
14274 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
14275 DW_STRING_IS_CANONICAL (attr
) = 0;
14276 info_ptr
+= bytes_read
;
14279 case DW_FORM_exprloc
:
14280 case DW_FORM_block
:
14281 blk
= dwarf_alloc_block (cu
);
14282 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14283 info_ptr
+= bytes_read
;
14284 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14285 info_ptr
+= blk
->size
;
14286 DW_BLOCK (attr
) = blk
;
14288 case DW_FORM_block1
:
14289 blk
= dwarf_alloc_block (cu
);
14290 blk
->size
= read_1_byte (abfd
, info_ptr
);
14292 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14293 info_ptr
+= blk
->size
;
14294 DW_BLOCK (attr
) = blk
;
14296 case DW_FORM_data1
:
14297 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14301 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14304 case DW_FORM_flag_present
:
14305 DW_UNSND (attr
) = 1;
14307 case DW_FORM_sdata
:
14308 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14309 info_ptr
+= bytes_read
;
14311 case DW_FORM_udata
:
14312 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14313 info_ptr
+= bytes_read
;
14316 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14317 + read_1_byte (abfd
, info_ptr
));
14321 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14322 + read_2_bytes (abfd
, info_ptr
));
14326 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14327 + read_4_bytes (abfd
, info_ptr
));
14331 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14332 + read_8_bytes (abfd
, info_ptr
));
14335 case DW_FORM_ref_sig8
:
14336 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
14339 case DW_FORM_ref_udata
:
14340 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14341 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14342 info_ptr
+= bytes_read
;
14344 case DW_FORM_indirect
:
14345 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14346 info_ptr
+= bytes_read
;
14347 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14349 case DW_FORM_GNU_addr_index
:
14350 if (reader
->dwo_file
== NULL
)
14352 /* For now flag a hard error.
14353 Later we can turn this into a complaint. */
14354 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14355 dwarf_form_name (form
),
14356 bfd_get_filename (abfd
));
14358 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14359 info_ptr
+= bytes_read
;
14361 case DW_FORM_GNU_str_index
:
14362 if (reader
->dwo_file
== NULL
)
14364 /* For now flag a hard error.
14365 Later we can turn this into a complaint if warranted. */
14366 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14367 dwarf_form_name (form
),
14368 bfd_get_filename (abfd
));
14371 ULONGEST str_index
=
14372 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14374 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14375 DW_STRING_IS_CANONICAL (attr
) = 0;
14376 info_ptr
+= bytes_read
;
14380 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14381 dwarf_form_name (form
),
14382 bfd_get_filename (abfd
));
14386 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14387 attr
->form
= DW_FORM_GNU_ref_alt
;
14389 /* We have seen instances where the compiler tried to emit a byte
14390 size attribute of -1 which ended up being encoded as an unsigned
14391 0xffffffff. Although 0xffffffff is technically a valid size value,
14392 an object of this size seems pretty unlikely so we can relatively
14393 safely treat these cases as if the size attribute was invalid and
14394 treat them as zero by default. */
14395 if (attr
->name
== DW_AT_byte_size
14396 && form
== DW_FORM_data4
14397 && DW_UNSND (attr
) >= 0xffffffff)
14400 (&symfile_complaints
,
14401 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14402 hex_string (DW_UNSND (attr
)));
14403 DW_UNSND (attr
) = 0;
14409 /* Read an attribute described by an abbreviated attribute. */
14411 static const gdb_byte
*
14412 read_attribute (const struct die_reader_specs
*reader
,
14413 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14414 const gdb_byte
*info_ptr
)
14416 attr
->name
= abbrev
->name
;
14417 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14420 /* Read dwarf information from a buffer. */
14422 static unsigned int
14423 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14425 return bfd_get_8 (abfd
, buf
);
14429 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14431 return bfd_get_signed_8 (abfd
, buf
);
14434 static unsigned int
14435 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14437 return bfd_get_16 (abfd
, buf
);
14441 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14443 return bfd_get_signed_16 (abfd
, buf
);
14446 static unsigned int
14447 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14449 return bfd_get_32 (abfd
, buf
);
14453 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14455 return bfd_get_signed_32 (abfd
, buf
);
14459 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14461 return bfd_get_64 (abfd
, buf
);
14465 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14466 unsigned int *bytes_read
)
14468 struct comp_unit_head
*cu_header
= &cu
->header
;
14469 CORE_ADDR retval
= 0;
14471 if (cu_header
->signed_addr_p
)
14473 switch (cu_header
->addr_size
)
14476 retval
= bfd_get_signed_16 (abfd
, buf
);
14479 retval
= bfd_get_signed_32 (abfd
, buf
);
14482 retval
= bfd_get_signed_64 (abfd
, buf
);
14485 internal_error (__FILE__
, __LINE__
,
14486 _("read_address: bad switch, signed [in module %s]"),
14487 bfd_get_filename (abfd
));
14492 switch (cu_header
->addr_size
)
14495 retval
= bfd_get_16 (abfd
, buf
);
14498 retval
= bfd_get_32 (abfd
, buf
);
14501 retval
= bfd_get_64 (abfd
, buf
);
14504 internal_error (__FILE__
, __LINE__
,
14505 _("read_address: bad switch, "
14506 "unsigned [in module %s]"),
14507 bfd_get_filename (abfd
));
14511 *bytes_read
= cu_header
->addr_size
;
14515 /* Read the initial length from a section. The (draft) DWARF 3
14516 specification allows the initial length to take up either 4 bytes
14517 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14518 bytes describe the length and all offsets will be 8 bytes in length
14521 An older, non-standard 64-bit format is also handled by this
14522 function. The older format in question stores the initial length
14523 as an 8-byte quantity without an escape value. Lengths greater
14524 than 2^32 aren't very common which means that the initial 4 bytes
14525 is almost always zero. Since a length value of zero doesn't make
14526 sense for the 32-bit format, this initial zero can be considered to
14527 be an escape value which indicates the presence of the older 64-bit
14528 format. As written, the code can't detect (old format) lengths
14529 greater than 4GB. If it becomes necessary to handle lengths
14530 somewhat larger than 4GB, we could allow other small values (such
14531 as the non-sensical values of 1, 2, and 3) to also be used as
14532 escape values indicating the presence of the old format.
14534 The value returned via bytes_read should be used to increment the
14535 relevant pointer after calling read_initial_length().
14537 [ Note: read_initial_length() and read_offset() are based on the
14538 document entitled "DWARF Debugging Information Format", revision
14539 3, draft 8, dated November 19, 2001. This document was obtained
14542 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14544 This document is only a draft and is subject to change. (So beware.)
14546 Details regarding the older, non-standard 64-bit format were
14547 determined empirically by examining 64-bit ELF files produced by
14548 the SGI toolchain on an IRIX 6.5 machine.
14550 - Kevin, July 16, 2002
14554 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
14556 LONGEST length
= bfd_get_32 (abfd
, buf
);
14558 if (length
== 0xffffffff)
14560 length
= bfd_get_64 (abfd
, buf
+ 4);
14563 else if (length
== 0)
14565 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14566 length
= bfd_get_64 (abfd
, buf
);
14577 /* Cover function for read_initial_length.
14578 Returns the length of the object at BUF, and stores the size of the
14579 initial length in *BYTES_READ and stores the size that offsets will be in
14581 If the initial length size is not equivalent to that specified in
14582 CU_HEADER then issue a complaint.
14583 This is useful when reading non-comp-unit headers. */
14586 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
14587 const struct comp_unit_head
*cu_header
,
14588 unsigned int *bytes_read
,
14589 unsigned int *offset_size
)
14591 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14593 gdb_assert (cu_header
->initial_length_size
== 4
14594 || cu_header
->initial_length_size
== 8
14595 || cu_header
->initial_length_size
== 12);
14597 if (cu_header
->initial_length_size
!= *bytes_read
)
14598 complaint (&symfile_complaints
,
14599 _("intermixed 32-bit and 64-bit DWARF sections"));
14601 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14605 /* Read an offset from the data stream. The size of the offset is
14606 given by cu_header->offset_size. */
14609 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
14610 const struct comp_unit_head
*cu_header
,
14611 unsigned int *bytes_read
)
14613 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14615 *bytes_read
= cu_header
->offset_size
;
14619 /* Read an offset from the data stream. */
14622 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
14624 LONGEST retval
= 0;
14626 switch (offset_size
)
14629 retval
= bfd_get_32 (abfd
, buf
);
14632 retval
= bfd_get_64 (abfd
, buf
);
14635 internal_error (__FILE__
, __LINE__
,
14636 _("read_offset_1: bad switch [in module %s]"),
14637 bfd_get_filename (abfd
));
14643 static const gdb_byte
*
14644 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
14646 /* If the size of a host char is 8 bits, we can return a pointer
14647 to the buffer, otherwise we have to copy the data to a buffer
14648 allocated on the temporary obstack. */
14649 gdb_assert (HOST_CHAR_BIT
== 8);
14653 static const char *
14654 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
14655 unsigned int *bytes_read_ptr
)
14657 /* If the size of a host char is 8 bits, we can return a pointer
14658 to the string, otherwise we have to copy the string to a buffer
14659 allocated on the temporary obstack. */
14660 gdb_assert (HOST_CHAR_BIT
== 8);
14663 *bytes_read_ptr
= 1;
14666 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
14667 return (const char *) buf
;
14670 static const char *
14671 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14673 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14674 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14675 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14676 bfd_get_filename (abfd
));
14677 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14678 error (_("DW_FORM_strp pointing outside of "
14679 ".debug_str section [in module %s]"),
14680 bfd_get_filename (abfd
));
14681 gdb_assert (HOST_CHAR_BIT
== 8);
14682 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14684 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14687 /* Read a string at offset STR_OFFSET in the .debug_str section from
14688 the .dwz file DWZ. Throw an error if the offset is too large. If
14689 the string consists of a single NUL byte, return NULL; otherwise
14690 return a pointer to the string. */
14692 static const char *
14693 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14695 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14697 if (dwz
->str
.buffer
== NULL
)
14698 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14699 "section [in module %s]"),
14700 bfd_get_filename (dwz
->dwz_bfd
));
14701 if (str_offset
>= dwz
->str
.size
)
14702 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14703 ".debug_str section [in module %s]"),
14704 bfd_get_filename (dwz
->dwz_bfd
));
14705 gdb_assert (HOST_CHAR_BIT
== 8);
14706 if (dwz
->str
.buffer
[str_offset
] == '\0')
14708 return (const char *) (dwz
->str
.buffer
+ str_offset
);
14711 static const char *
14712 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
14713 const struct comp_unit_head
*cu_header
,
14714 unsigned int *bytes_read_ptr
)
14716 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14718 return read_indirect_string_at_offset (abfd
, str_offset
);
14722 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
14723 unsigned int *bytes_read_ptr
)
14726 unsigned int num_read
;
14728 unsigned char byte
;
14736 byte
= bfd_get_8 (abfd
, buf
);
14739 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14740 if ((byte
& 128) == 0)
14746 *bytes_read_ptr
= num_read
;
14751 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
14752 unsigned int *bytes_read_ptr
)
14755 int i
, shift
, num_read
;
14756 unsigned char byte
;
14764 byte
= bfd_get_8 (abfd
, buf
);
14767 result
|= ((LONGEST
) (byte
& 127) << shift
);
14769 if ((byte
& 128) == 0)
14774 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14775 result
|= -(((LONGEST
) 1) << shift
);
14776 *bytes_read_ptr
= num_read
;
14780 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14781 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14782 ADDR_SIZE is the size of addresses from the CU header. */
14785 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14787 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14788 bfd
*abfd
= objfile
->obfd
;
14789 const gdb_byte
*info_ptr
;
14791 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14792 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14793 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14795 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14796 error (_("DW_FORM_addr_index pointing outside of "
14797 ".debug_addr section [in module %s]"),
14799 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14800 + addr_base
+ addr_index
* addr_size
);
14801 if (addr_size
== 4)
14802 return bfd_get_32 (abfd
, info_ptr
);
14804 return bfd_get_64 (abfd
, info_ptr
);
14807 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14810 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14812 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14815 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14818 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
14819 unsigned int *bytes_read
)
14821 bfd
*abfd
= cu
->objfile
->obfd
;
14822 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14824 return read_addr_index (cu
, addr_index
);
14827 /* Data structure to pass results from dwarf2_read_addr_index_reader
14828 back to dwarf2_read_addr_index. */
14830 struct dwarf2_read_addr_index_data
14832 ULONGEST addr_base
;
14836 /* die_reader_func for dwarf2_read_addr_index. */
14839 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14840 const gdb_byte
*info_ptr
,
14841 struct die_info
*comp_unit_die
,
14845 struct dwarf2_cu
*cu
= reader
->cu
;
14846 struct dwarf2_read_addr_index_data
*aidata
=
14847 (struct dwarf2_read_addr_index_data
*) data
;
14849 aidata
->addr_base
= cu
->addr_base
;
14850 aidata
->addr_size
= cu
->header
.addr_size
;
14853 /* Given an index in .debug_addr, fetch the value.
14854 NOTE: This can be called during dwarf expression evaluation,
14855 long after the debug information has been read, and thus per_cu->cu
14856 may no longer exist. */
14859 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14860 unsigned int addr_index
)
14862 struct objfile
*objfile
= per_cu
->objfile
;
14863 struct dwarf2_cu
*cu
= per_cu
->cu
;
14864 ULONGEST addr_base
;
14867 /* This is intended to be called from outside this file. */
14868 dw2_setup (objfile
);
14870 /* We need addr_base and addr_size.
14871 If we don't have PER_CU->cu, we have to get it.
14872 Nasty, but the alternative is storing the needed info in PER_CU,
14873 which at this point doesn't seem justified: it's not clear how frequently
14874 it would get used and it would increase the size of every PER_CU.
14875 Entry points like dwarf2_per_cu_addr_size do a similar thing
14876 so we're not in uncharted territory here.
14877 Alas we need to be a bit more complicated as addr_base is contained
14880 We don't need to read the entire CU(/TU).
14881 We just need the header and top level die.
14883 IWBN to use the aging mechanism to let us lazily later discard the CU.
14884 For now we skip this optimization. */
14888 addr_base
= cu
->addr_base
;
14889 addr_size
= cu
->header
.addr_size
;
14893 struct dwarf2_read_addr_index_data aidata
;
14895 /* Note: We can't use init_cutu_and_read_dies_simple here,
14896 we need addr_base. */
14897 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14898 dwarf2_read_addr_index_reader
, &aidata
);
14899 addr_base
= aidata
.addr_base
;
14900 addr_size
= aidata
.addr_size
;
14903 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14906 /* Given a DW_AT_str_index, fetch the string. */
14908 static const char *
14909 read_str_index (const struct die_reader_specs
*reader
,
14910 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14912 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14913 const char *dwo_name
= objfile
->name
;
14914 bfd
*abfd
= objfile
->obfd
;
14915 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14916 const gdb_byte
*info_ptr
;
14917 ULONGEST str_offset
;
14919 dwarf2_read_section (objfile
, §ions
->str
);
14920 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14921 if (sections
->str
.buffer
== NULL
)
14922 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14923 " in CU at offset 0x%lx [in module %s]"),
14924 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14925 if (sections
->str_offsets
.buffer
== NULL
)
14926 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14927 " in CU at offset 0x%lx [in module %s]"),
14928 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14929 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14930 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14931 " section in CU at offset 0x%lx [in module %s]"),
14932 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14933 info_ptr
= (sections
->str_offsets
.buffer
14934 + str_index
* cu
->header
.offset_size
);
14935 if (cu
->header
.offset_size
== 4)
14936 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14938 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14939 if (str_offset
>= sections
->str
.size
)
14940 error (_("Offset from DW_FORM_str_index pointing outside of"
14941 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14942 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14943 return (const char *) (sections
->str
.buffer
+ str_offset
);
14946 /* Return the length of an LEB128 number in BUF. */
14949 leb128_size (const gdb_byte
*buf
)
14951 const gdb_byte
*begin
= buf
;
14957 if ((byte
& 128) == 0)
14958 return buf
- begin
;
14963 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14970 cu
->language
= language_c
;
14972 case DW_LANG_C_plus_plus
:
14973 cu
->language
= language_cplus
;
14976 cu
->language
= language_d
;
14978 case DW_LANG_Fortran77
:
14979 case DW_LANG_Fortran90
:
14980 case DW_LANG_Fortran95
:
14981 cu
->language
= language_fortran
;
14984 cu
->language
= language_go
;
14986 case DW_LANG_Mips_Assembler
:
14987 cu
->language
= language_asm
;
14990 cu
->language
= language_java
;
14992 case DW_LANG_Ada83
:
14993 case DW_LANG_Ada95
:
14994 cu
->language
= language_ada
;
14996 case DW_LANG_Modula2
:
14997 cu
->language
= language_m2
;
14999 case DW_LANG_Pascal83
:
15000 cu
->language
= language_pascal
;
15003 cu
->language
= language_objc
;
15005 case DW_LANG_Cobol74
:
15006 case DW_LANG_Cobol85
:
15008 cu
->language
= language_minimal
;
15011 cu
->language_defn
= language_def (cu
->language
);
15014 /* Return the named attribute or NULL if not there. */
15016 static struct attribute
*
15017 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
15022 struct attribute
*spec
= NULL
;
15024 for (i
= 0; i
< die
->num_attrs
; ++i
)
15026 if (die
->attrs
[i
].name
== name
)
15027 return &die
->attrs
[i
];
15028 if (die
->attrs
[i
].name
== DW_AT_specification
15029 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
15030 spec
= &die
->attrs
[i
];
15036 die
= follow_die_ref (die
, spec
, &cu
);
15042 /* Return the named attribute or NULL if not there,
15043 but do not follow DW_AT_specification, etc.
15044 This is for use in contexts where we're reading .debug_types dies.
15045 Following DW_AT_specification, DW_AT_abstract_origin will take us
15046 back up the chain, and we want to go down. */
15048 static struct attribute
*
15049 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
15053 for (i
= 0; i
< die
->num_attrs
; ++i
)
15054 if (die
->attrs
[i
].name
== name
)
15055 return &die
->attrs
[i
];
15060 /* Return non-zero iff the attribute NAME is defined for the given DIE,
15061 and holds a non-zero value. This function should only be used for
15062 DW_FORM_flag or DW_FORM_flag_present attributes. */
15065 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
15067 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
15069 return (attr
&& DW_UNSND (attr
));
15073 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
15075 /* A DIE is a declaration if it has a DW_AT_declaration attribute
15076 which value is non-zero. However, we have to be careful with
15077 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
15078 (via dwarf2_flag_true_p) follows this attribute. So we may
15079 end up accidently finding a declaration attribute that belongs
15080 to a different DIE referenced by the specification attribute,
15081 even though the given DIE does not have a declaration attribute. */
15082 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
15083 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
15086 /* Return the die giving the specification for DIE, if there is
15087 one. *SPEC_CU is the CU containing DIE on input, and the CU
15088 containing the return value on output. If there is no
15089 specification, but there is an abstract origin, that is
15092 static struct die_info
*
15093 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
15095 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
15098 if (spec_attr
== NULL
)
15099 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
15101 if (spec_attr
== NULL
)
15104 return follow_die_ref (die
, spec_attr
, spec_cu
);
15107 /* Free the line_header structure *LH, and any arrays and strings it
15109 NOTE: This is also used as a "cleanup" function. */
15112 free_line_header (struct line_header
*lh
)
15114 if (lh
->standard_opcode_lengths
)
15115 xfree (lh
->standard_opcode_lengths
);
15117 /* Remember that all the lh->file_names[i].name pointers are
15118 pointers into debug_line_buffer, and don't need to be freed. */
15119 if (lh
->file_names
)
15120 xfree (lh
->file_names
);
15122 /* Similarly for the include directory names. */
15123 if (lh
->include_dirs
)
15124 xfree (lh
->include_dirs
);
15129 /* Add an entry to LH's include directory table. */
15132 add_include_dir (struct line_header
*lh
, const char *include_dir
)
15134 /* Grow the array if necessary. */
15135 if (lh
->include_dirs_size
== 0)
15137 lh
->include_dirs_size
= 1; /* for testing */
15138 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
15139 * sizeof (*lh
->include_dirs
));
15141 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
15143 lh
->include_dirs_size
*= 2;
15144 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
15145 (lh
->include_dirs_size
15146 * sizeof (*lh
->include_dirs
)));
15149 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
15152 /* Add an entry to LH's file name table. */
15155 add_file_name (struct line_header
*lh
,
15157 unsigned int dir_index
,
15158 unsigned int mod_time
,
15159 unsigned int length
)
15161 struct file_entry
*fe
;
15163 /* Grow the array if necessary. */
15164 if (lh
->file_names_size
== 0)
15166 lh
->file_names_size
= 1; /* for testing */
15167 lh
->file_names
= xmalloc (lh
->file_names_size
15168 * sizeof (*lh
->file_names
));
15170 else if (lh
->num_file_names
>= lh
->file_names_size
)
15172 lh
->file_names_size
*= 2;
15173 lh
->file_names
= xrealloc (lh
->file_names
,
15174 (lh
->file_names_size
15175 * sizeof (*lh
->file_names
)));
15178 fe
= &lh
->file_names
[lh
->num_file_names
++];
15180 fe
->dir_index
= dir_index
;
15181 fe
->mod_time
= mod_time
;
15182 fe
->length
= length
;
15183 fe
->included_p
= 0;
15187 /* A convenience function to find the proper .debug_line section for a
15190 static struct dwarf2_section_info
*
15191 get_debug_line_section (struct dwarf2_cu
*cu
)
15193 struct dwarf2_section_info
*section
;
15195 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
15197 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
15198 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
15199 else if (cu
->per_cu
->is_dwz
)
15201 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
15203 section
= &dwz
->line
;
15206 section
= &dwarf2_per_objfile
->line
;
15211 /* Read the statement program header starting at OFFSET in
15212 .debug_line, or .debug_line.dwo. Return a pointer
15213 to a struct line_header, allocated using xmalloc.
15215 NOTE: the strings in the include directory and file name tables of
15216 the returned object point into the dwarf line section buffer,
15217 and must not be freed. */
15219 static struct line_header
*
15220 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
15222 struct cleanup
*back_to
;
15223 struct line_header
*lh
;
15224 const gdb_byte
*line_ptr
;
15225 unsigned int bytes_read
, offset_size
;
15227 const char *cur_dir
, *cur_file
;
15228 struct dwarf2_section_info
*section
;
15231 section
= get_debug_line_section (cu
);
15232 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
15233 if (section
->buffer
== NULL
)
15235 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
15236 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
15238 complaint (&symfile_complaints
, _("missing .debug_line section"));
15242 /* We can't do this until we know the section is non-empty.
15243 Only then do we know we have such a section. */
15244 abfd
= section
->asection
->owner
;
15246 /* Make sure that at least there's room for the total_length field.
15247 That could be 12 bytes long, but we're just going to fudge that. */
15248 if (offset
+ 4 >= section
->size
)
15250 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15254 lh
= xmalloc (sizeof (*lh
));
15255 memset (lh
, 0, sizeof (*lh
));
15256 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
15259 line_ptr
= section
->buffer
+ offset
;
15261 /* Read in the header. */
15263 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
15264 &bytes_read
, &offset_size
);
15265 line_ptr
+= bytes_read
;
15266 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
15268 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15271 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
15272 lh
->version
= read_2_bytes (abfd
, line_ptr
);
15274 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
15275 line_ptr
+= offset_size
;
15276 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
15278 if (lh
->version
>= 4)
15280 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
15284 lh
->maximum_ops_per_instruction
= 1;
15286 if (lh
->maximum_ops_per_instruction
== 0)
15288 lh
->maximum_ops_per_instruction
= 1;
15289 complaint (&symfile_complaints
,
15290 _("invalid maximum_ops_per_instruction "
15291 "in `.debug_line' section"));
15294 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
15296 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
15298 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
15300 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15302 lh
->standard_opcode_lengths
15303 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15305 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15306 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15308 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15312 /* Read directory table. */
15313 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15315 line_ptr
+= bytes_read
;
15316 add_include_dir (lh
, cur_dir
);
15318 line_ptr
+= bytes_read
;
15320 /* Read file name table. */
15321 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15323 unsigned int dir_index
, mod_time
, length
;
15325 line_ptr
+= bytes_read
;
15326 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15327 line_ptr
+= bytes_read
;
15328 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15329 line_ptr
+= bytes_read
;
15330 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15331 line_ptr
+= bytes_read
;
15333 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15335 line_ptr
+= bytes_read
;
15336 lh
->statement_program_start
= line_ptr
;
15338 if (line_ptr
> (section
->buffer
+ section
->size
))
15339 complaint (&symfile_complaints
,
15340 _("line number info header doesn't "
15341 "fit in `.debug_line' section"));
15343 discard_cleanups (back_to
);
15347 /* Subroutine of dwarf_decode_lines to simplify it.
15348 Return the file name of the psymtab for included file FILE_INDEX
15349 in line header LH of PST.
15350 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15351 If space for the result is malloc'd, it will be freed by a cleanup.
15352 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
15354 The function creates dangling cleanup registration. */
15356 static const char *
15357 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15358 const struct partial_symtab
*pst
,
15359 const char *comp_dir
)
15361 const struct file_entry fe
= lh
->file_names
[file_index
];
15362 const char *include_name
= fe
.name
;
15363 const char *include_name_to_compare
= include_name
;
15364 const char *dir_name
= NULL
;
15365 const char *pst_filename
;
15366 char *copied_name
= NULL
;
15370 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15372 if (!IS_ABSOLUTE_PATH (include_name
)
15373 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15375 /* Avoid creating a duplicate psymtab for PST.
15376 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15377 Before we do the comparison, however, we need to account
15378 for DIR_NAME and COMP_DIR.
15379 First prepend dir_name (if non-NULL). If we still don't
15380 have an absolute path prepend comp_dir (if non-NULL).
15381 However, the directory we record in the include-file's
15382 psymtab does not contain COMP_DIR (to match the
15383 corresponding symtab(s)).
15388 bash$ gcc -g ./hello.c
15389 include_name = "hello.c"
15391 DW_AT_comp_dir = comp_dir = "/tmp"
15392 DW_AT_name = "./hello.c" */
15394 if (dir_name
!= NULL
)
15396 char *tem
= concat (dir_name
, SLASH_STRING
,
15397 include_name
, (char *)NULL
);
15399 make_cleanup (xfree
, tem
);
15400 include_name
= tem
;
15401 include_name_to_compare
= include_name
;
15403 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15405 char *tem
= concat (comp_dir
, SLASH_STRING
,
15406 include_name
, (char *)NULL
);
15408 make_cleanup (xfree
, tem
);
15409 include_name_to_compare
= tem
;
15413 pst_filename
= pst
->filename
;
15414 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15416 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15417 pst_filename
, (char *)NULL
);
15418 pst_filename
= copied_name
;
15421 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15423 if (copied_name
!= NULL
)
15424 xfree (copied_name
);
15428 return include_name
;
15431 /* Ignore this record_line request. */
15434 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15439 /* Subroutine of dwarf_decode_lines to simplify it.
15440 Process the line number information in LH. */
15443 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15444 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15446 const gdb_byte
*line_ptr
, *extended_end
;
15447 const gdb_byte
*line_end
;
15448 unsigned int bytes_read
, extended_len
;
15449 unsigned char op_code
, extended_op
, adj_opcode
;
15450 CORE_ADDR baseaddr
;
15451 struct objfile
*objfile
= cu
->objfile
;
15452 bfd
*abfd
= objfile
->obfd
;
15453 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15454 const int decode_for_pst_p
= (pst
!= NULL
);
15455 struct subfile
*last_subfile
= NULL
;
15456 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15459 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15461 line_ptr
= lh
->statement_program_start
;
15462 line_end
= lh
->statement_program_end
;
15464 /* Read the statement sequences until there's nothing left. */
15465 while (line_ptr
< line_end
)
15467 /* state machine registers */
15468 CORE_ADDR address
= 0;
15469 unsigned int file
= 1;
15470 unsigned int line
= 1;
15471 unsigned int column
= 0;
15472 int is_stmt
= lh
->default_is_stmt
;
15473 int basic_block
= 0;
15474 int end_sequence
= 0;
15476 unsigned char op_index
= 0;
15478 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15480 /* Start a subfile for the current file of the state machine. */
15481 /* lh->include_dirs and lh->file_names are 0-based, but the
15482 directory and file name numbers in the statement program
15484 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15485 const char *dir
= NULL
;
15488 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15490 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15493 /* Decode the table. */
15494 while (!end_sequence
)
15496 op_code
= read_1_byte (abfd
, line_ptr
);
15498 if (line_ptr
> line_end
)
15500 dwarf2_debug_line_missing_end_sequence_complaint ();
15504 if (op_code
>= lh
->opcode_base
)
15506 /* Special operand. */
15507 adj_opcode
= op_code
- lh
->opcode_base
;
15508 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15509 / lh
->maximum_ops_per_instruction
)
15510 * lh
->minimum_instruction_length
);
15511 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15512 % lh
->maximum_ops_per_instruction
);
15513 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15514 if (lh
->num_file_names
< file
|| file
== 0)
15515 dwarf2_debug_line_missing_file_complaint ();
15516 /* For now we ignore lines not starting on an
15517 instruction boundary. */
15518 else if (op_index
== 0)
15520 lh
->file_names
[file
- 1].included_p
= 1;
15521 if (!decode_for_pst_p
&& is_stmt
)
15523 if (last_subfile
!= current_subfile
)
15525 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15527 (*p_record_line
) (last_subfile
, 0, addr
);
15528 last_subfile
= current_subfile
;
15530 /* Append row to matrix using current values. */
15531 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15532 (*p_record_line
) (current_subfile
, line
, addr
);
15537 else switch (op_code
)
15539 case DW_LNS_extended_op
:
15540 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15542 line_ptr
+= bytes_read
;
15543 extended_end
= line_ptr
+ extended_len
;
15544 extended_op
= read_1_byte (abfd
, line_ptr
);
15546 switch (extended_op
)
15548 case DW_LNE_end_sequence
:
15549 p_record_line
= record_line
;
15552 case DW_LNE_set_address
:
15553 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15555 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15557 /* This line table is for a function which has been
15558 GCd by the linker. Ignore it. PR gdb/12528 */
15561 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15563 complaint (&symfile_complaints
,
15564 _(".debug_line address at offset 0x%lx is 0 "
15566 line_offset
, objfile
->name
);
15567 p_record_line
= noop_record_line
;
15571 line_ptr
+= bytes_read
;
15572 address
+= baseaddr
;
15574 case DW_LNE_define_file
:
15576 const char *cur_file
;
15577 unsigned int dir_index
, mod_time
, length
;
15579 cur_file
= read_direct_string (abfd
, line_ptr
,
15581 line_ptr
+= bytes_read
;
15583 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15584 line_ptr
+= bytes_read
;
15586 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15587 line_ptr
+= bytes_read
;
15589 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15590 line_ptr
+= bytes_read
;
15591 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15594 case DW_LNE_set_discriminator
:
15595 /* The discriminator is not interesting to the debugger;
15597 line_ptr
= extended_end
;
15600 complaint (&symfile_complaints
,
15601 _("mangled .debug_line section"));
15604 /* Make sure that we parsed the extended op correctly. If e.g.
15605 we expected a different address size than the producer used,
15606 we may have read the wrong number of bytes. */
15607 if (line_ptr
!= extended_end
)
15609 complaint (&symfile_complaints
,
15610 _("mangled .debug_line section"));
15615 if (lh
->num_file_names
< file
|| file
== 0)
15616 dwarf2_debug_line_missing_file_complaint ();
15619 lh
->file_names
[file
- 1].included_p
= 1;
15620 if (!decode_for_pst_p
&& is_stmt
)
15622 if (last_subfile
!= current_subfile
)
15624 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15626 (*p_record_line
) (last_subfile
, 0, addr
);
15627 last_subfile
= current_subfile
;
15629 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15630 (*p_record_line
) (current_subfile
, line
, addr
);
15635 case DW_LNS_advance_pc
:
15638 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15640 address
+= (((op_index
+ adjust
)
15641 / lh
->maximum_ops_per_instruction
)
15642 * lh
->minimum_instruction_length
);
15643 op_index
= ((op_index
+ adjust
)
15644 % lh
->maximum_ops_per_instruction
);
15645 line_ptr
+= bytes_read
;
15648 case DW_LNS_advance_line
:
15649 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15650 line_ptr
+= bytes_read
;
15652 case DW_LNS_set_file
:
15654 /* The arrays lh->include_dirs and lh->file_names are
15655 0-based, but the directory and file name numbers in
15656 the statement program are 1-based. */
15657 struct file_entry
*fe
;
15658 const char *dir
= NULL
;
15660 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15661 line_ptr
+= bytes_read
;
15662 if (lh
->num_file_names
< file
|| file
== 0)
15663 dwarf2_debug_line_missing_file_complaint ();
15666 fe
= &lh
->file_names
[file
- 1];
15668 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15669 if (!decode_for_pst_p
)
15671 last_subfile
= current_subfile
;
15672 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15677 case DW_LNS_set_column
:
15678 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15679 line_ptr
+= bytes_read
;
15681 case DW_LNS_negate_stmt
:
15682 is_stmt
= (!is_stmt
);
15684 case DW_LNS_set_basic_block
:
15687 /* Add to the address register of the state machine the
15688 address increment value corresponding to special opcode
15689 255. I.e., this value is scaled by the minimum
15690 instruction length since special opcode 255 would have
15691 scaled the increment. */
15692 case DW_LNS_const_add_pc
:
15694 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15696 address
+= (((op_index
+ adjust
)
15697 / lh
->maximum_ops_per_instruction
)
15698 * lh
->minimum_instruction_length
);
15699 op_index
= ((op_index
+ adjust
)
15700 % lh
->maximum_ops_per_instruction
);
15703 case DW_LNS_fixed_advance_pc
:
15704 address
+= read_2_bytes (abfd
, line_ptr
);
15710 /* Unknown standard opcode, ignore it. */
15713 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15715 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15716 line_ptr
+= bytes_read
;
15721 if (lh
->num_file_names
< file
|| file
== 0)
15722 dwarf2_debug_line_missing_file_complaint ();
15725 lh
->file_names
[file
- 1].included_p
= 1;
15726 if (!decode_for_pst_p
)
15728 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15729 (*p_record_line
) (current_subfile
, 0, addr
);
15735 /* Decode the Line Number Program (LNP) for the given line_header
15736 structure and CU. The actual information extracted and the type
15737 of structures created from the LNP depends on the value of PST.
15739 1. If PST is NULL, then this procedure uses the data from the program
15740 to create all necessary symbol tables, and their linetables.
15742 2. If PST is not NULL, this procedure reads the program to determine
15743 the list of files included by the unit represented by PST, and
15744 builds all the associated partial symbol tables.
15746 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15747 It is used for relative paths in the line table.
15748 NOTE: When processing partial symtabs (pst != NULL),
15749 comp_dir == pst->dirname.
15751 NOTE: It is important that psymtabs have the same file name (via strcmp)
15752 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15753 symtab we don't use it in the name of the psymtabs we create.
15754 E.g. expand_line_sal requires this when finding psymtabs to expand.
15755 A good testcase for this is mb-inline.exp. */
15758 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15759 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15760 int want_line_info
)
15762 struct objfile
*objfile
= cu
->objfile
;
15763 const int decode_for_pst_p
= (pst
!= NULL
);
15764 struct subfile
*first_subfile
= current_subfile
;
15766 if (want_line_info
)
15767 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15769 if (decode_for_pst_p
)
15773 /* Now that we're done scanning the Line Header Program, we can
15774 create the psymtab of each included file. */
15775 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15776 if (lh
->file_names
[file_index
].included_p
== 1)
15778 const char *include_name
=
15779 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15780 if (include_name
!= NULL
)
15781 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15786 /* Make sure a symtab is created for every file, even files
15787 which contain only variables (i.e. no code with associated
15791 for (i
= 0; i
< lh
->num_file_names
; i
++)
15793 const char *dir
= NULL
;
15794 struct file_entry
*fe
;
15796 fe
= &lh
->file_names
[i
];
15798 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15799 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15801 /* Skip the main file; we don't need it, and it must be
15802 allocated last, so that it will show up before the
15803 non-primary symtabs in the objfile's symtab list. */
15804 if (current_subfile
== first_subfile
)
15807 if (current_subfile
->symtab
== NULL
)
15808 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15810 fe
->symtab
= current_subfile
->symtab
;
15815 /* Start a subfile for DWARF. FILENAME is the name of the file and
15816 DIRNAME the name of the source directory which contains FILENAME
15817 or NULL if not known. COMP_DIR is the compilation directory for the
15818 linetable's compilation unit or NULL if not known.
15819 This routine tries to keep line numbers from identical absolute and
15820 relative file names in a common subfile.
15822 Using the `list' example from the GDB testsuite, which resides in
15823 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15824 of /srcdir/list0.c yields the following debugging information for list0.c:
15826 DW_AT_name: /srcdir/list0.c
15827 DW_AT_comp_dir: /compdir
15828 files.files[0].name: list0.h
15829 files.files[0].dir: /srcdir
15830 files.files[1].name: list0.c
15831 files.files[1].dir: /srcdir
15833 The line number information for list0.c has to end up in a single
15834 subfile, so that `break /srcdir/list0.c:1' works as expected.
15835 start_subfile will ensure that this happens provided that we pass the
15836 concatenation of files.files[1].dir and files.files[1].name as the
15840 dwarf2_start_subfile (const char *filename
, const char *dirname
,
15841 const char *comp_dir
)
15845 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15846 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15847 second argument to start_subfile. To be consistent, we do the
15848 same here. In order not to lose the line information directory,
15849 we concatenate it to the filename when it makes sense.
15850 Note that the Dwarf3 standard says (speaking of filenames in line
15851 information): ``The directory index is ignored for file names
15852 that represent full path names''. Thus ignoring dirname in the
15853 `else' branch below isn't an issue. */
15855 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15857 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15861 start_subfile (filename
, comp_dir
);
15867 /* Start a symtab for DWARF.
15868 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15871 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15872 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
15874 start_symtab (name
, comp_dir
, low_pc
);
15875 record_debugformat ("DWARF 2");
15876 record_producer (cu
->producer
);
15878 /* We assume that we're processing GCC output. */
15879 processing_gcc_compilation
= 2;
15881 cu
->processing_has_namespace_info
= 0;
15885 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15886 struct dwarf2_cu
*cu
)
15888 struct objfile
*objfile
= cu
->objfile
;
15889 struct comp_unit_head
*cu_header
= &cu
->header
;
15891 /* NOTE drow/2003-01-30: There used to be a comment and some special
15892 code here to turn a symbol with DW_AT_external and a
15893 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15894 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15895 with some versions of binutils) where shared libraries could have
15896 relocations against symbols in their debug information - the
15897 minimal symbol would have the right address, but the debug info
15898 would not. It's no longer necessary, because we will explicitly
15899 apply relocations when we read in the debug information now. */
15901 /* A DW_AT_location attribute with no contents indicates that a
15902 variable has been optimized away. */
15903 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15905 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
15909 /* Handle one degenerate form of location expression specially, to
15910 preserve GDB's previous behavior when section offsets are
15911 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15912 then mark this symbol as LOC_STATIC. */
15914 if (attr_form_is_block (attr
)
15915 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15916 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15917 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15918 && (DW_BLOCK (attr
)->size
15919 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15921 unsigned int dummy
;
15923 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15924 SYMBOL_VALUE_ADDRESS (sym
) =
15925 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15927 SYMBOL_VALUE_ADDRESS (sym
) =
15928 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15929 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
15930 fixup_symbol_section (sym
, objfile
);
15931 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15932 SYMBOL_SECTION (sym
));
15936 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15937 expression evaluator, and use LOC_COMPUTED only when necessary
15938 (i.e. when the value of a register or memory location is
15939 referenced, or a thread-local block, etc.). Then again, it might
15940 not be worthwhile. I'm assuming that it isn't unless performance
15941 or memory numbers show me otherwise. */
15943 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
15945 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
15946 cu
->has_loclist
= 1;
15949 /* Given a pointer to a DWARF information entry, figure out if we need
15950 to make a symbol table entry for it, and if so, create a new entry
15951 and return a pointer to it.
15952 If TYPE is NULL, determine symbol type from the die, otherwise
15953 used the passed type.
15954 If SPACE is not NULL, use it to hold the new symbol. If it is
15955 NULL, allocate a new symbol on the objfile's obstack. */
15957 static struct symbol
*
15958 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15959 struct symbol
*space
)
15961 struct objfile
*objfile
= cu
->objfile
;
15962 struct symbol
*sym
= NULL
;
15964 struct attribute
*attr
= NULL
;
15965 struct attribute
*attr2
= NULL
;
15966 CORE_ADDR baseaddr
;
15967 struct pending
**list_to_add
= NULL
;
15969 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15971 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15973 name
= dwarf2_name (die
, cu
);
15976 const char *linkagename
;
15977 int suppress_add
= 0;
15982 sym
= allocate_symbol (objfile
);
15983 OBJSTAT (objfile
, n_syms
++);
15985 /* Cache this symbol's name and the name's demangled form (if any). */
15986 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
15987 linkagename
= dwarf2_physname (name
, die
, cu
);
15988 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15990 /* Fortran does not have mangling standard and the mangling does differ
15991 between gfortran, iFort etc. */
15992 if (cu
->language
== language_fortran
15993 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15994 symbol_set_demangled_name (&(sym
->ginfo
),
15995 dwarf2_full_name (name
, die
, cu
),
15998 /* Default assumptions.
15999 Use the passed type or decode it from the die. */
16000 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16001 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
16003 SYMBOL_TYPE (sym
) = type
;
16005 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
16006 attr
= dwarf2_attr (die
,
16007 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
16011 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
16014 attr
= dwarf2_attr (die
,
16015 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
16019 int file_index
= DW_UNSND (attr
);
16021 if (cu
->line_header
== NULL
16022 || file_index
> cu
->line_header
->num_file_names
)
16023 complaint (&symfile_complaints
,
16024 _("file index out of range"));
16025 else if (file_index
> 0)
16027 struct file_entry
*fe
;
16029 fe
= &cu
->line_header
->file_names
[file_index
- 1];
16030 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
16037 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
16040 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
16042 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
16043 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
16044 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
16045 add_symbol_to_list (sym
, cu
->list_in_scope
);
16047 case DW_TAG_subprogram
:
16048 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
16050 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
16051 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
16052 if ((attr2
&& (DW_UNSND (attr2
) != 0))
16053 || cu
->language
== language_ada
)
16055 /* Subprograms marked external are stored as a global symbol.
16056 Ada subprograms, whether marked external or not, are always
16057 stored as a global symbol, because we want to be able to
16058 access them globally. For instance, we want to be able
16059 to break on a nested subprogram without having to
16060 specify the context. */
16061 list_to_add
= &global_symbols
;
16065 list_to_add
= cu
->list_in_scope
;
16068 case DW_TAG_inlined_subroutine
:
16069 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
16071 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
16072 SYMBOL_INLINED (sym
) = 1;
16073 list_to_add
= cu
->list_in_scope
;
16075 case DW_TAG_template_value_param
:
16077 /* Fall through. */
16078 case DW_TAG_constant
:
16079 case DW_TAG_variable
:
16080 case DW_TAG_member
:
16081 /* Compilation with minimal debug info may result in
16082 variables with missing type entries. Change the
16083 misleading `void' type to something sensible. */
16084 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
16086 = objfile_type (objfile
)->nodebug_data_symbol
;
16088 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16089 /* In the case of DW_TAG_member, we should only be called for
16090 static const members. */
16091 if (die
->tag
== DW_TAG_member
)
16093 /* dwarf2_add_field uses die_is_declaration,
16094 so we do the same. */
16095 gdb_assert (die_is_declaration (die
, cu
));
16100 dwarf2_const_value (attr
, sym
, cu
);
16101 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
16104 if (attr2
&& (DW_UNSND (attr2
) != 0))
16105 list_to_add
= &global_symbols
;
16107 list_to_add
= cu
->list_in_scope
;
16111 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16114 var_decode_location (attr
, sym
, cu
);
16115 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
16117 /* Fortran explicitly imports any global symbols to the local
16118 scope by DW_TAG_common_block. */
16119 if (cu
->language
== language_fortran
&& die
->parent
16120 && die
->parent
->tag
== DW_TAG_common_block
)
16123 if (SYMBOL_CLASS (sym
) == LOC_STATIC
16124 && SYMBOL_VALUE_ADDRESS (sym
) == 0
16125 && !dwarf2_per_objfile
->has_section_at_zero
)
16127 /* When a static variable is eliminated by the linker,
16128 the corresponding debug information is not stripped
16129 out, but the variable address is set to null;
16130 do not add such variables into symbol table. */
16132 else if (attr2
&& (DW_UNSND (attr2
) != 0))
16134 /* Workaround gfortran PR debug/40040 - it uses
16135 DW_AT_location for variables in -fPIC libraries which may
16136 get overriden by other libraries/executable and get
16137 a different address. Resolve it by the minimal symbol
16138 which may come from inferior's executable using copy
16139 relocation. Make this workaround only for gfortran as for
16140 other compilers GDB cannot guess the minimal symbol
16141 Fortran mangling kind. */
16142 if (cu
->language
== language_fortran
&& die
->parent
16143 && die
->parent
->tag
== DW_TAG_module
16145 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
16146 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
16148 /* A variable with DW_AT_external is never static,
16149 but it may be block-scoped. */
16150 list_to_add
= (cu
->list_in_scope
== &file_symbols
16151 ? &global_symbols
: cu
->list_in_scope
);
16154 list_to_add
= cu
->list_in_scope
;
16158 /* We do not know the address of this symbol.
16159 If it is an external symbol and we have type information
16160 for it, enter the symbol as a LOC_UNRESOLVED symbol.
16161 The address of the variable will then be determined from
16162 the minimal symbol table whenever the variable is
16164 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
16166 /* Fortran explicitly imports any global symbols to the local
16167 scope by DW_TAG_common_block. */
16168 if (cu
->language
== language_fortran
&& die
->parent
16169 && die
->parent
->tag
== DW_TAG_common_block
)
16171 /* SYMBOL_CLASS doesn't matter here because
16172 read_common_block is going to reset it. */
16174 list_to_add
= cu
->list_in_scope
;
16176 else if (attr2
&& (DW_UNSND (attr2
) != 0)
16177 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
16179 /* A variable with DW_AT_external is never static, but it
16180 may be block-scoped. */
16181 list_to_add
= (cu
->list_in_scope
== &file_symbols
16182 ? &global_symbols
: cu
->list_in_scope
);
16184 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
16186 else if (!die_is_declaration (die
, cu
))
16188 /* Use the default LOC_OPTIMIZED_OUT class. */
16189 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
16191 list_to_add
= cu
->list_in_scope
;
16195 case DW_TAG_formal_parameter
:
16196 /* If we are inside a function, mark this as an argument. If
16197 not, we might be looking at an argument to an inlined function
16198 when we do not have enough information to show inlined frames;
16199 pretend it's a local variable in that case so that the user can
16201 if (context_stack_depth
> 0
16202 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
16203 SYMBOL_IS_ARGUMENT (sym
) = 1;
16204 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16207 var_decode_location (attr
, sym
, cu
);
16209 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16212 dwarf2_const_value (attr
, sym
, cu
);
16215 list_to_add
= cu
->list_in_scope
;
16217 case DW_TAG_unspecified_parameters
:
16218 /* From varargs functions; gdb doesn't seem to have any
16219 interest in this information, so just ignore it for now.
16222 case DW_TAG_template_type_param
:
16224 /* Fall through. */
16225 case DW_TAG_class_type
:
16226 case DW_TAG_interface_type
:
16227 case DW_TAG_structure_type
:
16228 case DW_TAG_union_type
:
16229 case DW_TAG_set_type
:
16230 case DW_TAG_enumeration_type
:
16231 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
16232 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
16235 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
16236 really ever be static objects: otherwise, if you try
16237 to, say, break of a class's method and you're in a file
16238 which doesn't mention that class, it won't work unless
16239 the check for all static symbols in lookup_symbol_aux
16240 saves you. See the OtherFileClass tests in
16241 gdb.c++/namespace.exp. */
16245 list_to_add
= (cu
->list_in_scope
== &file_symbols
16246 && (cu
->language
== language_cplus
16247 || cu
->language
== language_java
)
16248 ? &global_symbols
: cu
->list_in_scope
);
16250 /* The semantics of C++ state that "struct foo {
16251 ... }" also defines a typedef for "foo". A Java
16252 class declaration also defines a typedef for the
16254 if (cu
->language
== language_cplus
16255 || cu
->language
== language_java
16256 || cu
->language
== language_ada
)
16258 /* The symbol's name is already allocated along
16259 with this objfile, so we don't need to
16260 duplicate it for the type. */
16261 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
16262 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
16267 case DW_TAG_typedef
:
16268 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
16269 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16270 list_to_add
= cu
->list_in_scope
;
16272 case DW_TAG_base_type
:
16273 case DW_TAG_subrange_type
:
16274 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
16275 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16276 list_to_add
= cu
->list_in_scope
;
16278 case DW_TAG_enumerator
:
16279 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16282 dwarf2_const_value (attr
, sym
, cu
);
16285 /* NOTE: carlton/2003-11-10: See comment above in the
16286 DW_TAG_class_type, etc. block. */
16288 list_to_add
= (cu
->list_in_scope
== &file_symbols
16289 && (cu
->language
== language_cplus
16290 || cu
->language
== language_java
)
16291 ? &global_symbols
: cu
->list_in_scope
);
16294 case DW_TAG_namespace
:
16295 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
16296 list_to_add
= &global_symbols
;
16298 case DW_TAG_common_block
:
16299 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
16300 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
16301 add_symbol_to_list (sym
, cu
->list_in_scope
);
16304 /* Not a tag we recognize. Hopefully we aren't processing
16305 trash data, but since we must specifically ignore things
16306 we don't recognize, there is nothing else we should do at
16308 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16309 dwarf_tag_name (die
->tag
));
16315 sym
->hash_next
= objfile
->template_symbols
;
16316 objfile
->template_symbols
= sym
;
16317 list_to_add
= NULL
;
16320 if (list_to_add
!= NULL
)
16321 add_symbol_to_list (sym
, list_to_add
);
16323 /* For the benefit of old versions of GCC, check for anonymous
16324 namespaces based on the demangled name. */
16325 if (!cu
->processing_has_namespace_info
16326 && cu
->language
== language_cplus
)
16327 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16332 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16334 static struct symbol
*
16335 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16337 return new_symbol_full (die
, type
, cu
, NULL
);
16340 /* Given an attr with a DW_FORM_dataN value in host byte order,
16341 zero-extend it as appropriate for the symbol's type. The DWARF
16342 standard (v4) is not entirely clear about the meaning of using
16343 DW_FORM_dataN for a constant with a signed type, where the type is
16344 wider than the data. The conclusion of a discussion on the DWARF
16345 list was that this is unspecified. We choose to always zero-extend
16346 because that is the interpretation long in use by GCC. */
16349 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16350 const char *name
, struct obstack
*obstack
,
16351 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16353 struct objfile
*objfile
= cu
->objfile
;
16354 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16355 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16356 LONGEST l
= DW_UNSND (attr
);
16358 if (bits
< sizeof (*value
) * 8)
16360 l
&= ((LONGEST
) 1 << bits
) - 1;
16363 else if (bits
== sizeof (*value
) * 8)
16367 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16368 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16375 /* Read a constant value from an attribute. Either set *VALUE, or if
16376 the value does not fit in *VALUE, set *BYTES - either already
16377 allocated on the objfile obstack, or newly allocated on OBSTACK,
16378 or, set *BATON, if we translated the constant to a location
16382 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16383 const char *name
, struct obstack
*obstack
,
16384 struct dwarf2_cu
*cu
,
16385 LONGEST
*value
, const gdb_byte
**bytes
,
16386 struct dwarf2_locexpr_baton
**baton
)
16388 struct objfile
*objfile
= cu
->objfile
;
16389 struct comp_unit_head
*cu_header
= &cu
->header
;
16390 struct dwarf_block
*blk
;
16391 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16392 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16398 switch (attr
->form
)
16401 case DW_FORM_GNU_addr_index
:
16405 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16406 dwarf2_const_value_length_mismatch_complaint (name
,
16407 cu_header
->addr_size
,
16408 TYPE_LENGTH (type
));
16409 /* Symbols of this form are reasonably rare, so we just
16410 piggyback on the existing location code rather than writing
16411 a new implementation of symbol_computed_ops. */
16412 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16413 sizeof (struct dwarf2_locexpr_baton
));
16414 (*baton
)->per_cu
= cu
->per_cu
;
16415 gdb_assert ((*baton
)->per_cu
);
16417 (*baton
)->size
= 2 + cu_header
->addr_size
;
16418 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16419 (*baton
)->data
= data
;
16421 data
[0] = DW_OP_addr
;
16422 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16423 byte_order
, DW_ADDR (attr
));
16424 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16427 case DW_FORM_string
:
16429 case DW_FORM_GNU_str_index
:
16430 case DW_FORM_GNU_strp_alt
:
16431 /* DW_STRING is already allocated on the objfile obstack, point
16433 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
16435 case DW_FORM_block1
:
16436 case DW_FORM_block2
:
16437 case DW_FORM_block4
:
16438 case DW_FORM_block
:
16439 case DW_FORM_exprloc
:
16440 blk
= DW_BLOCK (attr
);
16441 if (TYPE_LENGTH (type
) != blk
->size
)
16442 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16443 TYPE_LENGTH (type
));
16444 *bytes
= blk
->data
;
16447 /* The DW_AT_const_value attributes are supposed to carry the
16448 symbol's value "represented as it would be on the target
16449 architecture." By the time we get here, it's already been
16450 converted to host endianness, so we just need to sign- or
16451 zero-extend it as appropriate. */
16452 case DW_FORM_data1
:
16453 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16454 obstack
, cu
, value
, 8);
16456 case DW_FORM_data2
:
16457 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16458 obstack
, cu
, value
, 16);
16460 case DW_FORM_data4
:
16461 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16462 obstack
, cu
, value
, 32);
16464 case DW_FORM_data8
:
16465 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16466 obstack
, cu
, value
, 64);
16469 case DW_FORM_sdata
:
16470 *value
= DW_SND (attr
);
16473 case DW_FORM_udata
:
16474 *value
= DW_UNSND (attr
);
16478 complaint (&symfile_complaints
,
16479 _("unsupported const value attribute form: '%s'"),
16480 dwarf_form_name (attr
->form
));
16487 /* Copy constant value from an attribute to a symbol. */
16490 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16491 struct dwarf2_cu
*cu
)
16493 struct objfile
*objfile
= cu
->objfile
;
16494 struct comp_unit_head
*cu_header
= &cu
->header
;
16496 const gdb_byte
*bytes
;
16497 struct dwarf2_locexpr_baton
*baton
;
16499 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16500 SYMBOL_PRINT_NAME (sym
),
16501 &objfile
->objfile_obstack
, cu
,
16502 &value
, &bytes
, &baton
);
16506 SYMBOL_LOCATION_BATON (sym
) = baton
;
16507 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16509 else if (bytes
!= NULL
)
16511 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16512 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
16516 SYMBOL_VALUE (sym
) = value
;
16517 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
16521 /* Return the type of the die in question using its DW_AT_type attribute. */
16523 static struct type
*
16524 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16526 struct attribute
*type_attr
;
16528 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16531 /* A missing DW_AT_type represents a void type. */
16532 return objfile_type (cu
->objfile
)->builtin_void
;
16535 return lookup_die_type (die
, type_attr
, cu
);
16538 /* True iff CU's producer generates GNAT Ada auxiliary information
16539 that allows to find parallel types through that information instead
16540 of having to do expensive parallel lookups by type name. */
16543 need_gnat_info (struct dwarf2_cu
*cu
)
16545 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16546 of GNAT produces this auxiliary information, without any indication
16547 that it is produced. Part of enhancing the FSF version of GNAT
16548 to produce that information will be to put in place an indicator
16549 that we can use in order to determine whether the descriptive type
16550 info is available or not. One suggestion that has been made is
16551 to use a new attribute, attached to the CU die. For now, assume
16552 that the descriptive type info is not available. */
16556 /* Return the auxiliary type of the die in question using its
16557 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16558 attribute is not present. */
16560 static struct type
*
16561 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16563 struct attribute
*type_attr
;
16565 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16569 return lookup_die_type (die
, type_attr
, cu
);
16572 /* If DIE has a descriptive_type attribute, then set the TYPE's
16573 descriptive type accordingly. */
16576 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16577 struct dwarf2_cu
*cu
)
16579 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16581 if (descriptive_type
)
16583 ALLOCATE_GNAT_AUX_TYPE (type
);
16584 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16588 /* Return the containing type of the die in question using its
16589 DW_AT_containing_type attribute. */
16591 static struct type
*
16592 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16594 struct attribute
*type_attr
;
16596 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16598 error (_("Dwarf Error: Problem turning containing type into gdb type "
16599 "[in module %s]"), cu
->objfile
->name
);
16601 return lookup_die_type (die
, type_attr
, cu
);
16604 /* Return an error marker type to use for the ill formed type in DIE/CU. */
16606 static struct type
*
16607 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
16609 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16610 char *message
, *saved
;
16612 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16614 cu
->header
.offset
.sect_off
,
16615 die
->offset
.sect_off
);
16616 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16617 message
, strlen (message
));
16620 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16623 /* Look up the type of DIE in CU using its type attribute ATTR.
16624 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
16625 DW_AT_containing_type.
16626 If there is no type substitute an error marker. */
16628 static struct type
*
16629 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16630 struct dwarf2_cu
*cu
)
16632 struct objfile
*objfile
= cu
->objfile
;
16633 struct type
*this_type
;
16635 gdb_assert (attr
->name
== DW_AT_type
16636 || attr
->name
== DW_AT_GNAT_descriptive_type
16637 || attr
->name
== DW_AT_containing_type
);
16639 /* First see if we have it cached. */
16641 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16643 struct dwarf2_per_cu_data
*per_cu
;
16644 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16646 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16647 this_type
= get_die_type_at_offset (offset
, per_cu
);
16649 else if (is_ref_attr (attr
))
16651 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16653 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16655 else if (attr
->form
== DW_FORM_ref_sig8
)
16657 ULONGEST signature
= DW_SIGNATURE (attr
);
16659 return get_signatured_type (die
, signature
, cu
);
16663 complaint (&symfile_complaints
,
16664 _("Dwarf Error: Bad type attribute %s in DIE"
16665 " at 0x%x [in module %s]"),
16666 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
16668 return build_error_marker_type (cu
, die
);
16671 /* If not cached we need to read it in. */
16673 if (this_type
== NULL
)
16675 struct die_info
*type_die
= NULL
;
16676 struct dwarf2_cu
*type_cu
= cu
;
16678 if (is_ref_attr (attr
))
16679 type_die
= follow_die_ref (die
, attr
, &type_cu
);
16680 if (type_die
== NULL
)
16681 return build_error_marker_type (cu
, die
);
16682 /* If we find the type now, it's probably because the type came
16683 from an inter-CU reference and the type's CU got expanded before
16685 this_type
= read_type_die (type_die
, type_cu
);
16688 /* If we still don't have a type use an error marker. */
16690 if (this_type
== NULL
)
16691 return build_error_marker_type (cu
, die
);
16696 /* Return the type in DIE, CU.
16697 Returns NULL for invalid types.
16699 This first does a lookup in die_type_hash,
16700 and only reads the die in if necessary.
16702 NOTE: This can be called when reading in partial or full symbols. */
16704 static struct type
*
16705 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16707 struct type
*this_type
;
16709 this_type
= get_die_type (die
, cu
);
16713 return read_type_die_1 (die
, cu
);
16716 /* Read the type in DIE, CU.
16717 Returns NULL for invalid types. */
16719 static struct type
*
16720 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16722 struct type
*this_type
= NULL
;
16726 case DW_TAG_class_type
:
16727 case DW_TAG_interface_type
:
16728 case DW_TAG_structure_type
:
16729 case DW_TAG_union_type
:
16730 this_type
= read_structure_type (die
, cu
);
16732 case DW_TAG_enumeration_type
:
16733 this_type
= read_enumeration_type (die
, cu
);
16735 case DW_TAG_subprogram
:
16736 case DW_TAG_subroutine_type
:
16737 case DW_TAG_inlined_subroutine
:
16738 this_type
= read_subroutine_type (die
, cu
);
16740 case DW_TAG_array_type
:
16741 this_type
= read_array_type (die
, cu
);
16743 case DW_TAG_set_type
:
16744 this_type
= read_set_type (die
, cu
);
16746 case DW_TAG_pointer_type
:
16747 this_type
= read_tag_pointer_type (die
, cu
);
16749 case DW_TAG_ptr_to_member_type
:
16750 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16752 case DW_TAG_reference_type
:
16753 this_type
= read_tag_reference_type (die
, cu
);
16755 case DW_TAG_const_type
:
16756 this_type
= read_tag_const_type (die
, cu
);
16758 case DW_TAG_volatile_type
:
16759 this_type
= read_tag_volatile_type (die
, cu
);
16761 case DW_TAG_restrict_type
:
16762 this_type
= read_tag_restrict_type (die
, cu
);
16764 case DW_TAG_string_type
:
16765 this_type
= read_tag_string_type (die
, cu
);
16767 case DW_TAG_typedef
:
16768 this_type
= read_typedef (die
, cu
);
16770 case DW_TAG_subrange_type
:
16771 this_type
= read_subrange_type (die
, cu
);
16773 case DW_TAG_base_type
:
16774 this_type
= read_base_type (die
, cu
);
16776 case DW_TAG_unspecified_type
:
16777 this_type
= read_unspecified_type (die
, cu
);
16779 case DW_TAG_namespace
:
16780 this_type
= read_namespace_type (die
, cu
);
16782 case DW_TAG_module
:
16783 this_type
= read_module_type (die
, cu
);
16786 complaint (&symfile_complaints
,
16787 _("unexpected tag in read_type_die: '%s'"),
16788 dwarf_tag_name (die
->tag
));
16795 /* See if we can figure out if the class lives in a namespace. We do
16796 this by looking for a member function; its demangled name will
16797 contain namespace info, if there is any.
16798 Return the computed name or NULL.
16799 Space for the result is allocated on the objfile's obstack.
16800 This is the full-die version of guess_partial_die_structure_name.
16801 In this case we know DIE has no useful parent. */
16804 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16806 struct die_info
*spec_die
;
16807 struct dwarf2_cu
*spec_cu
;
16808 struct die_info
*child
;
16811 spec_die
= die_specification (die
, &spec_cu
);
16812 if (spec_die
!= NULL
)
16818 for (child
= die
->child
;
16820 child
= child
->sibling
)
16822 if (child
->tag
== DW_TAG_subprogram
)
16824 struct attribute
*attr
;
16826 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16828 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16832 = language_class_name_from_physname (cu
->language_defn
,
16836 if (actual_name
!= NULL
)
16838 const char *die_name
= dwarf2_name (die
, cu
);
16840 if (die_name
!= NULL
16841 && strcmp (die_name
, actual_name
) != 0)
16843 /* Strip off the class name from the full name.
16844 We want the prefix. */
16845 int die_name_len
= strlen (die_name
);
16846 int actual_name_len
= strlen (actual_name
);
16848 /* Test for '::' as a sanity check. */
16849 if (actual_name_len
> die_name_len
+ 2
16850 && actual_name
[actual_name_len
16851 - die_name_len
- 1] == ':')
16853 obstack_copy0 (&cu
->objfile
->objfile_obstack
,
16855 actual_name_len
- die_name_len
- 2);
16858 xfree (actual_name
);
16867 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16868 prefix part in such case. See
16869 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16872 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16874 struct attribute
*attr
;
16877 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16878 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16881 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16882 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16885 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16887 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16888 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16891 /* dwarf2_name had to be already called. */
16892 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16894 /* Strip the base name, keep any leading namespaces/classes. */
16895 base
= strrchr (DW_STRING (attr
), ':');
16896 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16899 return obstack_copy0 (&cu
->objfile
->objfile_obstack
,
16900 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
16903 /* Return the name of the namespace/class that DIE is defined within,
16904 or "" if we can't tell. The caller should not xfree the result.
16906 For example, if we're within the method foo() in the following
16916 then determine_prefix on foo's die will return "N::C". */
16918 static const char *
16919 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16921 struct die_info
*parent
, *spec_die
;
16922 struct dwarf2_cu
*spec_cu
;
16923 struct type
*parent_type
;
16926 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16927 && cu
->language
!= language_fortran
)
16930 retval
= anonymous_struct_prefix (die
, cu
);
16934 /* We have to be careful in the presence of DW_AT_specification.
16935 For example, with GCC 3.4, given the code
16939 // Definition of N::foo.
16943 then we'll have a tree of DIEs like this:
16945 1: DW_TAG_compile_unit
16946 2: DW_TAG_namespace // N
16947 3: DW_TAG_subprogram // declaration of N::foo
16948 4: DW_TAG_subprogram // definition of N::foo
16949 DW_AT_specification // refers to die #3
16951 Thus, when processing die #4, we have to pretend that we're in
16952 the context of its DW_AT_specification, namely the contex of die
16955 spec_die
= die_specification (die
, &spec_cu
);
16956 if (spec_die
== NULL
)
16957 parent
= die
->parent
;
16960 parent
= spec_die
->parent
;
16964 if (parent
== NULL
)
16966 else if (parent
->building_fullname
)
16969 const char *parent_name
;
16971 /* It has been seen on RealView 2.2 built binaries,
16972 DW_TAG_template_type_param types actually _defined_ as
16973 children of the parent class:
16976 template class <class Enum> Class{};
16977 Class<enum E> class_e;
16979 1: DW_TAG_class_type (Class)
16980 2: DW_TAG_enumeration_type (E)
16981 3: DW_TAG_enumerator (enum1:0)
16982 3: DW_TAG_enumerator (enum2:1)
16984 2: DW_TAG_template_type_param
16985 DW_AT_type DW_FORM_ref_udata (E)
16987 Besides being broken debug info, it can put GDB into an
16988 infinite loop. Consider:
16990 When we're building the full name for Class<E>, we'll start
16991 at Class, and go look over its template type parameters,
16992 finding E. We'll then try to build the full name of E, and
16993 reach here. We're now trying to build the full name of E,
16994 and look over the parent DIE for containing scope. In the
16995 broken case, if we followed the parent DIE of E, we'd again
16996 find Class, and once again go look at its template type
16997 arguments, etc., etc. Simply don't consider such parent die
16998 as source-level parent of this die (it can't be, the language
16999 doesn't allow it), and break the loop here. */
17000 name
= dwarf2_name (die
, cu
);
17001 parent_name
= dwarf2_name (parent
, cu
);
17002 complaint (&symfile_complaints
,
17003 _("template param type '%s' defined within parent '%s'"),
17004 name
? name
: "<unknown>",
17005 parent_name
? parent_name
: "<unknown>");
17009 switch (parent
->tag
)
17011 case DW_TAG_namespace
:
17012 parent_type
= read_type_die (parent
, cu
);
17013 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
17014 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
17015 Work around this problem here. */
17016 if (cu
->language
== language_cplus
17017 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
17019 /* We give a name to even anonymous namespaces. */
17020 return TYPE_TAG_NAME (parent_type
);
17021 case DW_TAG_class_type
:
17022 case DW_TAG_interface_type
:
17023 case DW_TAG_structure_type
:
17024 case DW_TAG_union_type
:
17025 case DW_TAG_module
:
17026 parent_type
= read_type_die (parent
, cu
);
17027 if (TYPE_TAG_NAME (parent_type
) != NULL
)
17028 return TYPE_TAG_NAME (parent_type
);
17030 /* An anonymous structure is only allowed non-static data
17031 members; no typedefs, no member functions, et cetera.
17032 So it does not need a prefix. */
17034 case DW_TAG_compile_unit
:
17035 case DW_TAG_partial_unit
:
17036 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
17037 if (cu
->language
== language_cplus
17038 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
17039 && die
->child
!= NULL
17040 && (die
->tag
== DW_TAG_class_type
17041 || die
->tag
== DW_TAG_structure_type
17042 || die
->tag
== DW_TAG_union_type
))
17044 char *name
= guess_full_die_structure_name (die
, cu
);
17050 return determine_prefix (parent
, cu
);
17054 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
17055 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
17056 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
17057 an obconcat, otherwise allocate storage for the result. The CU argument is
17058 used to determine the language and hence, the appropriate separator. */
17060 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
17063 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
17064 int physname
, struct dwarf2_cu
*cu
)
17066 const char *lead
= "";
17069 if (suffix
== NULL
|| suffix
[0] == '\0'
17070 || prefix
== NULL
|| prefix
[0] == '\0')
17072 else if (cu
->language
== language_java
)
17074 else if (cu
->language
== language_fortran
&& physname
)
17076 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
17077 DW_AT_MIPS_linkage_name is preferred and used instead. */
17085 if (prefix
== NULL
)
17087 if (suffix
== NULL
)
17093 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
17095 strcpy (retval
, lead
);
17096 strcat (retval
, prefix
);
17097 strcat (retval
, sep
);
17098 strcat (retval
, suffix
);
17103 /* We have an obstack. */
17104 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
17108 /* Return sibling of die, NULL if no sibling. */
17110 static struct die_info
*
17111 sibling_die (struct die_info
*die
)
17113 return die
->sibling
;
17116 /* Get name of a die, return NULL if not found. */
17118 static const char *
17119 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
17120 struct obstack
*obstack
)
17122 if (name
&& cu
->language
== language_cplus
)
17124 char *canon_name
= cp_canonicalize_string (name
);
17126 if (canon_name
!= NULL
)
17128 if (strcmp (canon_name
, name
) != 0)
17129 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
17130 xfree (canon_name
);
17137 /* Get name of a die, return NULL if not found. */
17139 static const char *
17140 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
17142 struct attribute
*attr
;
17144 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
17145 if ((!attr
|| !DW_STRING (attr
))
17146 && die
->tag
!= DW_TAG_class_type
17147 && die
->tag
!= DW_TAG_interface_type
17148 && die
->tag
!= DW_TAG_structure_type
17149 && die
->tag
!= DW_TAG_union_type
)
17154 case DW_TAG_compile_unit
:
17155 case DW_TAG_partial_unit
:
17156 /* Compilation units have a DW_AT_name that is a filename, not
17157 a source language identifier. */
17158 case DW_TAG_enumeration_type
:
17159 case DW_TAG_enumerator
:
17160 /* These tags always have simple identifiers already; no need
17161 to canonicalize them. */
17162 return DW_STRING (attr
);
17164 case DW_TAG_subprogram
:
17165 /* Java constructors will all be named "<init>", so return
17166 the class name when we see this special case. */
17167 if (cu
->language
== language_java
17168 && DW_STRING (attr
) != NULL
17169 && strcmp (DW_STRING (attr
), "<init>") == 0)
17171 struct dwarf2_cu
*spec_cu
= cu
;
17172 struct die_info
*spec_die
;
17174 /* GCJ will output '<init>' for Java constructor names.
17175 For this special case, return the name of the parent class. */
17177 /* GCJ may output suprogram DIEs with AT_specification set.
17178 If so, use the name of the specified DIE. */
17179 spec_die
= die_specification (die
, &spec_cu
);
17180 if (spec_die
!= NULL
)
17181 return dwarf2_name (spec_die
, spec_cu
);
17186 if (die
->tag
== DW_TAG_class_type
)
17187 return dwarf2_name (die
, cu
);
17189 while (die
->tag
!= DW_TAG_compile_unit
17190 && die
->tag
!= DW_TAG_partial_unit
);
17194 case DW_TAG_class_type
:
17195 case DW_TAG_interface_type
:
17196 case DW_TAG_structure_type
:
17197 case DW_TAG_union_type
:
17198 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
17199 structures or unions. These were of the form "._%d" in GCC 4.1,
17200 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
17201 and GCC 4.4. We work around this problem by ignoring these. */
17202 if (attr
&& DW_STRING (attr
)
17203 && (strncmp (DW_STRING (attr
), "._", 2) == 0
17204 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
17207 /* GCC might emit a nameless typedef that has a linkage name. See
17208 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
17209 if (!attr
|| DW_STRING (attr
) == NULL
)
17211 char *demangled
= NULL
;
17213 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
17215 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
17217 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
17220 /* Avoid demangling DW_STRING (attr) the second time on a second
17221 call for the same DIE. */
17222 if (!DW_STRING_IS_CANONICAL (attr
))
17223 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
17229 /* FIXME: we already did this for the partial symbol... */
17230 DW_STRING (attr
) = obstack_copy0 (&cu
->objfile
->objfile_obstack
,
17231 demangled
, strlen (demangled
));
17232 DW_STRING_IS_CANONICAL (attr
) = 1;
17235 /* Strip any leading namespaces/classes, keep only the base name.
17236 DW_AT_name for named DIEs does not contain the prefixes. */
17237 base
= strrchr (DW_STRING (attr
), ':');
17238 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
17241 return DW_STRING (attr
);
17250 if (!DW_STRING_IS_CANONICAL (attr
))
17253 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
17254 &cu
->objfile
->objfile_obstack
);
17255 DW_STRING_IS_CANONICAL (attr
) = 1;
17257 return DW_STRING (attr
);
17260 /* Return the die that this die in an extension of, or NULL if there
17261 is none. *EXT_CU is the CU containing DIE on input, and the CU
17262 containing the return value on output. */
17264 static struct die_info
*
17265 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
17267 struct attribute
*attr
;
17269 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
17273 return follow_die_ref (die
, attr
, ext_cu
);
17276 /* Convert a DIE tag into its string name. */
17278 static const char *
17279 dwarf_tag_name (unsigned tag
)
17281 const char *name
= get_DW_TAG_name (tag
);
17284 return "DW_TAG_<unknown>";
17289 /* Convert a DWARF attribute code into its string name. */
17291 static const char *
17292 dwarf_attr_name (unsigned attr
)
17296 #ifdef MIPS /* collides with DW_AT_HP_block_index */
17297 if (attr
== DW_AT_MIPS_fde
)
17298 return "DW_AT_MIPS_fde";
17300 if (attr
== DW_AT_HP_block_index
)
17301 return "DW_AT_HP_block_index";
17304 name
= get_DW_AT_name (attr
);
17307 return "DW_AT_<unknown>";
17312 /* Convert a DWARF value form code into its string name. */
17314 static const char *
17315 dwarf_form_name (unsigned form
)
17317 const char *name
= get_DW_FORM_name (form
);
17320 return "DW_FORM_<unknown>";
17326 dwarf_bool_name (unsigned mybool
)
17334 /* Convert a DWARF type code into its string name. */
17336 static const char *
17337 dwarf_type_encoding_name (unsigned enc
)
17339 const char *name
= get_DW_ATE_name (enc
);
17342 return "DW_ATE_<unknown>";
17348 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17352 print_spaces (indent
, f
);
17353 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17354 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17356 if (die
->parent
!= NULL
)
17358 print_spaces (indent
, f
);
17359 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17360 die
->parent
->offset
.sect_off
);
17363 print_spaces (indent
, f
);
17364 fprintf_unfiltered (f
, " has children: %s\n",
17365 dwarf_bool_name (die
->child
!= NULL
));
17367 print_spaces (indent
, f
);
17368 fprintf_unfiltered (f
, " attributes:\n");
17370 for (i
= 0; i
< die
->num_attrs
; ++i
)
17372 print_spaces (indent
, f
);
17373 fprintf_unfiltered (f
, " %s (%s) ",
17374 dwarf_attr_name (die
->attrs
[i
].name
),
17375 dwarf_form_name (die
->attrs
[i
].form
));
17377 switch (die
->attrs
[i
].form
)
17380 case DW_FORM_GNU_addr_index
:
17381 fprintf_unfiltered (f
, "address: ");
17382 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17384 case DW_FORM_block2
:
17385 case DW_FORM_block4
:
17386 case DW_FORM_block
:
17387 case DW_FORM_block1
:
17388 fprintf_unfiltered (f
, "block: size %s",
17389 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17391 case DW_FORM_exprloc
:
17392 fprintf_unfiltered (f
, "expression: size %s",
17393 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17395 case DW_FORM_ref_addr
:
17396 fprintf_unfiltered (f
, "ref address: ");
17397 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17399 case DW_FORM_GNU_ref_alt
:
17400 fprintf_unfiltered (f
, "alt ref address: ");
17401 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17407 case DW_FORM_ref_udata
:
17408 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17409 (long) (DW_UNSND (&die
->attrs
[i
])));
17411 case DW_FORM_data1
:
17412 case DW_FORM_data2
:
17413 case DW_FORM_data4
:
17414 case DW_FORM_data8
:
17415 case DW_FORM_udata
:
17416 case DW_FORM_sdata
:
17417 fprintf_unfiltered (f
, "constant: %s",
17418 pulongest (DW_UNSND (&die
->attrs
[i
])));
17420 case DW_FORM_sec_offset
:
17421 fprintf_unfiltered (f
, "section offset: %s",
17422 pulongest (DW_UNSND (&die
->attrs
[i
])));
17424 case DW_FORM_ref_sig8
:
17425 fprintf_unfiltered (f
, "signature: %s",
17426 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
17428 case DW_FORM_string
:
17430 case DW_FORM_GNU_str_index
:
17431 case DW_FORM_GNU_strp_alt
:
17432 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17433 DW_STRING (&die
->attrs
[i
])
17434 ? DW_STRING (&die
->attrs
[i
]) : "",
17435 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17438 if (DW_UNSND (&die
->attrs
[i
]))
17439 fprintf_unfiltered (f
, "flag: TRUE");
17441 fprintf_unfiltered (f
, "flag: FALSE");
17443 case DW_FORM_flag_present
:
17444 fprintf_unfiltered (f
, "flag: TRUE");
17446 case DW_FORM_indirect
:
17447 /* The reader will have reduced the indirect form to
17448 the "base form" so this form should not occur. */
17449 fprintf_unfiltered (f
,
17450 "unexpected attribute form: DW_FORM_indirect");
17453 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17454 die
->attrs
[i
].form
);
17457 fprintf_unfiltered (f
, "\n");
17462 dump_die_for_error (struct die_info
*die
)
17464 dump_die_shallow (gdb_stderr
, 0, die
);
17468 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17470 int indent
= level
* 4;
17472 gdb_assert (die
!= NULL
);
17474 if (level
>= max_level
)
17477 dump_die_shallow (f
, indent
, die
);
17479 if (die
->child
!= NULL
)
17481 print_spaces (indent
, f
);
17482 fprintf_unfiltered (f
, " Children:");
17483 if (level
+ 1 < max_level
)
17485 fprintf_unfiltered (f
, "\n");
17486 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17490 fprintf_unfiltered (f
,
17491 " [not printed, max nesting level reached]\n");
17495 if (die
->sibling
!= NULL
&& level
> 0)
17497 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17501 /* This is called from the pdie macro in gdbinit.in.
17502 It's not static so gcc will keep a copy callable from gdb. */
17505 dump_die (struct die_info
*die
, int max_level
)
17507 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17511 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17515 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17521 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17522 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17525 is_ref_attr (struct attribute
*attr
)
17527 switch (attr
->form
)
17529 case DW_FORM_ref_addr
:
17534 case DW_FORM_ref_udata
:
17535 case DW_FORM_GNU_ref_alt
:
17542 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17546 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17548 sect_offset retval
= { DW_UNSND (attr
) };
17550 if (is_ref_attr (attr
))
17553 retval
.sect_off
= 0;
17554 complaint (&symfile_complaints
,
17555 _("unsupported die ref attribute form: '%s'"),
17556 dwarf_form_name (attr
->form
));
17560 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17561 * the value held by the attribute is not constant. */
17564 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17566 if (attr
->form
== DW_FORM_sdata
)
17567 return DW_SND (attr
);
17568 else if (attr
->form
== DW_FORM_udata
17569 || attr
->form
== DW_FORM_data1
17570 || attr
->form
== DW_FORM_data2
17571 || attr
->form
== DW_FORM_data4
17572 || attr
->form
== DW_FORM_data8
)
17573 return DW_UNSND (attr
);
17576 complaint (&symfile_complaints
,
17577 _("Attribute value is not a constant (%s)"),
17578 dwarf_form_name (attr
->form
));
17579 return default_value
;
17583 /* Follow reference or signature attribute ATTR of SRC_DIE.
17584 On entry *REF_CU is the CU of SRC_DIE.
17585 On exit *REF_CU is the CU of the result. */
17587 static struct die_info
*
17588 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17589 struct dwarf2_cu
**ref_cu
)
17591 struct die_info
*die
;
17593 if (is_ref_attr (attr
))
17594 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17595 else if (attr
->form
== DW_FORM_ref_sig8
)
17596 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17599 dump_die_for_error (src_die
);
17600 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17601 (*ref_cu
)->objfile
->name
);
17607 /* Follow reference OFFSET.
17608 On entry *REF_CU is the CU of the source die referencing OFFSET.
17609 On exit *REF_CU is the CU of the result.
17610 Returns NULL if OFFSET is invalid. */
17612 static struct die_info
*
17613 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17614 struct dwarf2_cu
**ref_cu
)
17616 struct die_info temp_die
;
17617 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17619 gdb_assert (cu
->per_cu
!= NULL
);
17623 if (cu
->per_cu
->is_debug_types
)
17625 /* .debug_types CUs cannot reference anything outside their CU.
17626 If they need to, they have to reference a signatured type via
17627 DW_FORM_ref_sig8. */
17628 if (! offset_in_cu_p (&cu
->header
, offset
))
17631 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17632 || ! offset_in_cu_p (&cu
->header
, offset
))
17634 struct dwarf2_per_cu_data
*per_cu
;
17636 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17639 /* If necessary, add it to the queue and load its DIEs. */
17640 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17641 load_full_comp_unit (per_cu
, cu
->language
);
17643 target_cu
= per_cu
->cu
;
17645 else if (cu
->dies
== NULL
)
17647 /* We're loading full DIEs during partial symbol reading. */
17648 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17649 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17652 *ref_cu
= target_cu
;
17653 temp_die
.offset
= offset
;
17654 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17657 /* Follow reference attribute ATTR of SRC_DIE.
17658 On entry *REF_CU is the CU of SRC_DIE.
17659 On exit *REF_CU is the CU of the result. */
17661 static struct die_info
*
17662 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17663 struct dwarf2_cu
**ref_cu
)
17665 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17666 struct dwarf2_cu
*cu
= *ref_cu
;
17667 struct die_info
*die
;
17669 die
= follow_die_offset (offset
,
17670 (attr
->form
== DW_FORM_GNU_ref_alt
17671 || cu
->per_cu
->is_dwz
),
17674 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17675 "at 0x%x [in module %s]"),
17676 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17681 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17682 Returned value is intended for DW_OP_call*. Returned
17683 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17685 struct dwarf2_locexpr_baton
17686 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17687 struct dwarf2_per_cu_data
*per_cu
,
17688 CORE_ADDR (*get_frame_pc
) (void *baton
),
17691 struct dwarf2_cu
*cu
;
17692 struct die_info
*die
;
17693 struct attribute
*attr
;
17694 struct dwarf2_locexpr_baton retval
;
17696 dw2_setup (per_cu
->objfile
);
17698 if (per_cu
->cu
== NULL
)
17702 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17704 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17705 offset
.sect_off
, per_cu
->objfile
->name
);
17707 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17710 /* DWARF: "If there is no such attribute, then there is no effect.".
17711 DATA is ignored if SIZE is 0. */
17713 retval
.data
= NULL
;
17716 else if (attr_form_is_section_offset (attr
))
17718 struct dwarf2_loclist_baton loclist_baton
;
17719 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17722 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17724 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17726 retval
.size
= size
;
17730 if (!attr_form_is_block (attr
))
17731 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17732 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17733 offset
.sect_off
, per_cu
->objfile
->name
);
17735 retval
.data
= DW_BLOCK (attr
)->data
;
17736 retval
.size
= DW_BLOCK (attr
)->size
;
17738 retval
.per_cu
= cu
->per_cu
;
17740 age_cached_comp_units ();
17745 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17748 struct dwarf2_locexpr_baton
17749 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17750 struct dwarf2_per_cu_data
*per_cu
,
17751 CORE_ADDR (*get_frame_pc
) (void *baton
),
17754 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17756 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17759 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17763 dwarf2_get_die_type (cu_offset die_offset
,
17764 struct dwarf2_per_cu_data
*per_cu
)
17766 sect_offset die_offset_sect
;
17768 dw2_setup (per_cu
->objfile
);
17770 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17771 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17774 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
17775 On entry *REF_CU is the CU of SRC_DIE.
17776 On exit *REF_CU is the CU of the result.
17777 Returns NULL if the referenced DIE isn't found. */
17779 static struct die_info
*
17780 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
17781 struct dwarf2_cu
**ref_cu
)
17783 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17784 struct die_info temp_die
;
17785 struct dwarf2_cu
*sig_cu
;
17786 struct die_info
*die
;
17788 /* While it might be nice to assert sig_type->type == NULL here,
17789 we can get here for DW_AT_imported_declaration where we need
17790 the DIE not the type. */
17792 /* If necessary, add it to the queue and load its DIEs. */
17794 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17795 read_signatured_type (sig_type
);
17797 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17799 sig_cu
= sig_type
->per_cu
.cu
;
17800 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17801 temp_die
.offset
= sig_type
->type_offset_in_section
;
17802 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17803 temp_die
.offset
.sect_off
);
17806 /* For .gdb_index version 7 keep track of included TUs.
17807 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
17808 if (dwarf2_per_objfile
->index_table
!= NULL
17809 && dwarf2_per_objfile
->index_table
->version
<= 7)
17811 VEC_safe_push (dwarf2_per_cu_ptr
,
17812 (*ref_cu
)->per_cu
->imported_symtabs
,
17823 /* Follow signatured type referenced by ATTR in SRC_DIE.
17824 On entry *REF_CU is the CU of SRC_DIE.
17825 On exit *REF_CU is the CU of the result.
17826 The result is the DIE of the type.
17827 If the referenced type cannot be found an error is thrown. */
17829 static struct die_info
*
17830 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17831 struct dwarf2_cu
**ref_cu
)
17833 ULONGEST signature
= DW_SIGNATURE (attr
);
17834 struct signatured_type
*sig_type
;
17835 struct die_info
*die
;
17837 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
17839 sig_type
= lookup_signatured_type (signature
);
17840 /* sig_type will be NULL if the signatured type is missing from
17842 if (sig_type
== NULL
)
17844 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
17845 " from DIE at 0x%x [in module %s]"),
17846 hex_string (signature
), src_die
->offset
.sect_off
,
17847 (*ref_cu
)->objfile
->name
);
17850 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
17853 dump_die_for_error (src_die
);
17854 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
17855 " from DIE at 0x%x [in module %s]"),
17856 hex_string (signature
), src_die
->offset
.sect_off
,
17857 (*ref_cu
)->objfile
->name
);
17863 /* Get the type specified by SIGNATURE referenced in DIE/CU,
17864 reading in and processing the type unit if necessary. */
17866 static struct type
*
17867 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
17868 struct dwarf2_cu
*cu
)
17870 struct signatured_type
*sig_type
;
17871 struct dwarf2_cu
*type_cu
;
17872 struct die_info
*type_die
;
17875 sig_type
= lookup_signatured_type (signature
);
17876 /* sig_type will be NULL if the signatured type is missing from
17878 if (sig_type
== NULL
)
17880 complaint (&symfile_complaints
,
17881 _("Dwarf Error: Cannot find signatured DIE %s referenced"
17882 " from DIE at 0x%x [in module %s]"),
17883 hex_string (signature
), die
->offset
.sect_off
,
17884 dwarf2_per_objfile
->objfile
->name
);
17885 return build_error_marker_type (cu
, die
);
17888 /* If we already know the type we're done. */
17889 if (sig_type
->type
!= NULL
)
17890 return sig_type
->type
;
17893 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
17894 if (type_die
!= NULL
)
17896 /* N.B. We need to call get_die_type to ensure only one type for this DIE
17897 is created. This is important, for example, because for c++ classes
17898 we need TYPE_NAME set which is only done by new_symbol. Blech. */
17899 type
= read_type_die (type_die
, type_cu
);
17902 complaint (&symfile_complaints
,
17903 _("Dwarf Error: Cannot build signatured type %s"
17904 " referenced from DIE at 0x%x [in module %s]"),
17905 hex_string (signature
), die
->offset
.sect_off
,
17906 dwarf2_per_objfile
->objfile
->name
);
17907 type
= build_error_marker_type (cu
, die
);
17912 complaint (&symfile_complaints
,
17913 _("Dwarf Error: Problem reading signatured DIE %s referenced"
17914 " from DIE at 0x%x [in module %s]"),
17915 hex_string (signature
), die
->offset
.sect_off
,
17916 dwarf2_per_objfile
->objfile
->name
);
17917 type
= build_error_marker_type (cu
, die
);
17919 sig_type
->type
= type
;
17924 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
17925 reading in and processing the type unit if necessary. */
17927 static struct type
*
17928 get_DW_AT_signature_type (struct die_info
*die
, struct attribute
*attr
,
17929 struct dwarf2_cu
*cu
)
17931 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
17932 if (is_ref_attr (attr
))
17934 struct dwarf2_cu
*type_cu
= cu
;
17935 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
17937 return read_type_die (type_die
, type_cu
);
17939 else if (attr
->form
== DW_FORM_ref_sig8
)
17941 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
17945 complaint (&symfile_complaints
,
17946 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
17947 " at 0x%x [in module %s]"),
17948 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
17949 dwarf2_per_objfile
->objfile
->name
);
17950 return build_error_marker_type (cu
, die
);
17954 /* Load the DIEs associated with type unit PER_CU into memory. */
17957 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17959 struct signatured_type
*sig_type
;
17961 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17962 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17964 /* We have the per_cu, but we need the signatured_type.
17965 Fortunately this is an easy translation. */
17966 gdb_assert (per_cu
->is_debug_types
);
17967 sig_type
= (struct signatured_type
*) per_cu
;
17969 gdb_assert (per_cu
->cu
== NULL
);
17971 read_signatured_type (sig_type
);
17973 gdb_assert (per_cu
->cu
!= NULL
);
17976 /* die_reader_func for read_signatured_type.
17977 This is identical to load_full_comp_unit_reader,
17978 but is kept separate for now. */
17981 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17982 const gdb_byte
*info_ptr
,
17983 struct die_info
*comp_unit_die
,
17987 struct dwarf2_cu
*cu
= reader
->cu
;
17989 gdb_assert (cu
->die_hash
== NULL
);
17991 htab_create_alloc_ex (cu
->header
.length
/ 12,
17995 &cu
->comp_unit_obstack
,
17996 hashtab_obstack_allocate
,
17997 dummy_obstack_deallocate
);
18000 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
18001 &info_ptr
, comp_unit_die
);
18002 cu
->dies
= comp_unit_die
;
18003 /* comp_unit_die is not stored in die_hash, no need. */
18005 /* We try not to read any attributes in this function, because not
18006 all CUs needed for references have been loaded yet, and symbol
18007 table processing isn't initialized. But we have to set the CU language,
18008 or we won't be able to build types correctly.
18009 Similarly, if we do not read the producer, we can not apply
18010 producer-specific interpretation. */
18011 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
18014 /* Read in a signatured type and build its CU and DIEs.
18015 If the type is a stub for the real type in a DWO file,
18016 read in the real type from the DWO file as well. */
18019 read_signatured_type (struct signatured_type
*sig_type
)
18021 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
18023 gdb_assert (per_cu
->is_debug_types
);
18024 gdb_assert (per_cu
->cu
== NULL
);
18026 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
18027 read_signatured_type_reader
, NULL
);
18030 /* Decode simple location descriptions.
18031 Given a pointer to a dwarf block that defines a location, compute
18032 the location and return the value.
18034 NOTE drow/2003-11-18: This function is called in two situations
18035 now: for the address of static or global variables (partial symbols
18036 only) and for offsets into structures which are expected to be
18037 (more or less) constant. The partial symbol case should go away,
18038 and only the constant case should remain. That will let this
18039 function complain more accurately. A few special modes are allowed
18040 without complaint for global variables (for instance, global
18041 register values and thread-local values).
18043 A location description containing no operations indicates that the
18044 object is optimized out. The return value is 0 for that case.
18045 FIXME drow/2003-11-16: No callers check for this case any more; soon all
18046 callers will only want a very basic result and this can become a
18049 Note that stack[0] is unused except as a default error return. */
18052 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
18054 struct objfile
*objfile
= cu
->objfile
;
18056 size_t size
= blk
->size
;
18057 const gdb_byte
*data
= blk
->data
;
18058 CORE_ADDR stack
[64];
18060 unsigned int bytes_read
, unsnd
;
18066 stack
[++stacki
] = 0;
18105 stack
[++stacki
] = op
- DW_OP_lit0
;
18140 stack
[++stacki
] = op
- DW_OP_reg0
;
18142 dwarf2_complex_location_expr_complaint ();
18146 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
18148 stack
[++stacki
] = unsnd
;
18150 dwarf2_complex_location_expr_complaint ();
18154 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
18159 case DW_OP_const1u
:
18160 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
18164 case DW_OP_const1s
:
18165 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
18169 case DW_OP_const2u
:
18170 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
18174 case DW_OP_const2s
:
18175 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
18179 case DW_OP_const4u
:
18180 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
18184 case DW_OP_const4s
:
18185 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
18189 case DW_OP_const8u
:
18190 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
18195 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
18201 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
18206 stack
[stacki
+ 1] = stack
[stacki
];
18211 stack
[stacki
- 1] += stack
[stacki
];
18215 case DW_OP_plus_uconst
:
18216 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
18222 stack
[stacki
- 1] -= stack
[stacki
];
18227 /* If we're not the last op, then we definitely can't encode
18228 this using GDB's address_class enum. This is valid for partial
18229 global symbols, although the variable's address will be bogus
18232 dwarf2_complex_location_expr_complaint ();
18235 case DW_OP_GNU_push_tls_address
:
18236 /* The top of the stack has the offset from the beginning
18237 of the thread control block at which the variable is located. */
18238 /* Nothing should follow this operator, so the top of stack would
18240 /* This is valid for partial global symbols, but the variable's
18241 address will be bogus in the psymtab. Make it always at least
18242 non-zero to not look as a variable garbage collected by linker
18243 which have DW_OP_addr 0. */
18245 dwarf2_complex_location_expr_complaint ();
18249 case DW_OP_GNU_uninit
:
18252 case DW_OP_GNU_addr_index
:
18253 case DW_OP_GNU_const_index
:
18254 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
18261 const char *name
= get_DW_OP_name (op
);
18264 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
18267 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
18271 return (stack
[stacki
]);
18274 /* Enforce maximum stack depth of SIZE-1 to avoid writing
18275 outside of the allocated space. Also enforce minimum>0. */
18276 if (stacki
>= ARRAY_SIZE (stack
) - 1)
18278 complaint (&symfile_complaints
,
18279 _("location description stack overflow"));
18285 complaint (&symfile_complaints
,
18286 _("location description stack underflow"));
18290 return (stack
[stacki
]);
18293 /* memory allocation interface */
18295 static struct dwarf_block
*
18296 dwarf_alloc_block (struct dwarf2_cu
*cu
)
18298 struct dwarf_block
*blk
;
18300 blk
= (struct dwarf_block
*)
18301 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
18305 static struct die_info
*
18306 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
18308 struct die_info
*die
;
18309 size_t size
= sizeof (struct die_info
);
18312 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
18314 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
18315 memset (die
, 0, sizeof (struct die_info
));
18320 /* Macro support. */
18322 /* Return file name relative to the compilation directory of file number I in
18323 *LH's file name table. The result is allocated using xmalloc; the caller is
18324 responsible for freeing it. */
18327 file_file_name (int file
, struct line_header
*lh
)
18329 /* Is the file number a valid index into the line header's file name
18330 table? Remember that file numbers start with one, not zero. */
18331 if (1 <= file
&& file
<= lh
->num_file_names
)
18333 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
18335 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
18336 return xstrdup (fe
->name
);
18337 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
18342 /* The compiler produced a bogus file number. We can at least
18343 record the macro definitions made in the file, even if we
18344 won't be able to find the file by name. */
18345 char fake_name
[80];
18347 xsnprintf (fake_name
, sizeof (fake_name
),
18348 "<bad macro file number %d>", file
);
18350 complaint (&symfile_complaints
,
18351 _("bad file number in macro information (%d)"),
18354 return xstrdup (fake_name
);
18358 /* Return the full name of file number I in *LH's file name table.
18359 Use COMP_DIR as the name of the current directory of the
18360 compilation. The result is allocated using xmalloc; the caller is
18361 responsible for freeing it. */
18363 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
18365 /* Is the file number a valid index into the line header's file name
18366 table? Remember that file numbers start with one, not zero. */
18367 if (1 <= file
&& file
<= lh
->num_file_names
)
18369 char *relative
= file_file_name (file
, lh
);
18371 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
18373 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
18376 return file_file_name (file
, lh
);
18380 static struct macro_source_file
*
18381 macro_start_file (int file
, int line
,
18382 struct macro_source_file
*current_file
,
18383 const char *comp_dir
,
18384 struct line_header
*lh
, struct objfile
*objfile
)
18386 /* File name relative to the compilation directory of this source file. */
18387 char *file_name
= file_file_name (file
, lh
);
18389 /* We don't create a macro table for this compilation unit
18390 at all until we actually get a filename. */
18391 if (! pending_macros
)
18392 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
18393 objfile
->per_bfd
->macro_cache
,
18396 if (! current_file
)
18398 /* If we have no current file, then this must be the start_file
18399 directive for the compilation unit's main source file. */
18400 current_file
= macro_set_main (pending_macros
, file_name
);
18401 macro_define_special (pending_macros
);
18404 current_file
= macro_include (current_file
, line
, file_name
);
18408 return current_file
;
18412 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18413 followed by a null byte. */
18415 copy_string (const char *buf
, int len
)
18417 char *s
= xmalloc (len
+ 1);
18419 memcpy (s
, buf
, len
);
18425 static const char *
18426 consume_improper_spaces (const char *p
, const char *body
)
18430 complaint (&symfile_complaints
,
18431 _("macro definition contains spaces "
18432 "in formal argument list:\n`%s'"),
18444 parse_macro_definition (struct macro_source_file
*file
, int line
,
18449 /* The body string takes one of two forms. For object-like macro
18450 definitions, it should be:
18452 <macro name> " " <definition>
18454 For function-like macro definitions, it should be:
18456 <macro name> "() " <definition>
18458 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18460 Spaces may appear only where explicitly indicated, and in the
18463 The Dwarf 2 spec says that an object-like macro's name is always
18464 followed by a space, but versions of GCC around March 2002 omit
18465 the space when the macro's definition is the empty string.
18467 The Dwarf 2 spec says that there should be no spaces between the
18468 formal arguments in a function-like macro's formal argument list,
18469 but versions of GCC around March 2002 include spaces after the
18473 /* Find the extent of the macro name. The macro name is terminated
18474 by either a space or null character (for an object-like macro) or
18475 an opening paren (for a function-like macro). */
18476 for (p
= body
; *p
; p
++)
18477 if (*p
== ' ' || *p
== '(')
18480 if (*p
== ' ' || *p
== '\0')
18482 /* It's an object-like macro. */
18483 int name_len
= p
- body
;
18484 char *name
= copy_string (body
, name_len
);
18485 const char *replacement
;
18488 replacement
= body
+ name_len
+ 1;
18491 dwarf2_macro_malformed_definition_complaint (body
);
18492 replacement
= body
+ name_len
;
18495 macro_define_object (file
, line
, name
, replacement
);
18499 else if (*p
== '(')
18501 /* It's a function-like macro. */
18502 char *name
= copy_string (body
, p
- body
);
18505 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18509 p
= consume_improper_spaces (p
, body
);
18511 /* Parse the formal argument list. */
18512 while (*p
&& *p
!= ')')
18514 /* Find the extent of the current argument name. */
18515 const char *arg_start
= p
;
18517 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18520 if (! *p
|| p
== arg_start
)
18521 dwarf2_macro_malformed_definition_complaint (body
);
18524 /* Make sure argv has room for the new argument. */
18525 if (argc
>= argv_size
)
18528 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18531 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18534 p
= consume_improper_spaces (p
, body
);
18536 /* Consume the comma, if present. */
18541 p
= consume_improper_spaces (p
, body
);
18550 /* Perfectly formed definition, no complaints. */
18551 macro_define_function (file
, line
, name
,
18552 argc
, (const char **) argv
,
18554 else if (*p
== '\0')
18556 /* Complain, but do define it. */
18557 dwarf2_macro_malformed_definition_complaint (body
);
18558 macro_define_function (file
, line
, name
,
18559 argc
, (const char **) argv
,
18563 /* Just complain. */
18564 dwarf2_macro_malformed_definition_complaint (body
);
18567 /* Just complain. */
18568 dwarf2_macro_malformed_definition_complaint (body
);
18574 for (i
= 0; i
< argc
; i
++)
18580 dwarf2_macro_malformed_definition_complaint (body
);
18583 /* Skip some bytes from BYTES according to the form given in FORM.
18584 Returns the new pointer. */
18586 static const gdb_byte
*
18587 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
18588 enum dwarf_form form
,
18589 unsigned int offset_size
,
18590 struct dwarf2_section_info
*section
)
18592 unsigned int bytes_read
;
18596 case DW_FORM_data1
:
18601 case DW_FORM_data2
:
18605 case DW_FORM_data4
:
18609 case DW_FORM_data8
:
18613 case DW_FORM_string
:
18614 read_direct_string (abfd
, bytes
, &bytes_read
);
18615 bytes
+= bytes_read
;
18618 case DW_FORM_sec_offset
:
18620 case DW_FORM_GNU_strp_alt
:
18621 bytes
+= offset_size
;
18624 case DW_FORM_block
:
18625 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18626 bytes
+= bytes_read
;
18629 case DW_FORM_block1
:
18630 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18632 case DW_FORM_block2
:
18633 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18635 case DW_FORM_block4
:
18636 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18639 case DW_FORM_sdata
:
18640 case DW_FORM_udata
:
18641 case DW_FORM_GNU_addr_index
:
18642 case DW_FORM_GNU_str_index
:
18643 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
18646 dwarf2_section_buffer_overflow_complaint (section
);
18654 complaint (&symfile_complaints
,
18655 _("invalid form 0x%x in `%s'"),
18657 section
->asection
->name
);
18665 /* A helper for dwarf_decode_macros that handles skipping an unknown
18666 opcode. Returns an updated pointer to the macro data buffer; or,
18667 on error, issues a complaint and returns NULL. */
18669 static const gdb_byte
*
18670 skip_unknown_opcode (unsigned int opcode
,
18671 const gdb_byte
**opcode_definitions
,
18672 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
18674 unsigned int offset_size
,
18675 struct dwarf2_section_info
*section
)
18677 unsigned int bytes_read
, i
;
18679 const gdb_byte
*defn
;
18681 if (opcode_definitions
[opcode
] == NULL
)
18683 complaint (&symfile_complaints
,
18684 _("unrecognized DW_MACFINO opcode 0x%x"),
18689 defn
= opcode_definitions
[opcode
];
18690 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18691 defn
+= bytes_read
;
18693 for (i
= 0; i
< arg
; ++i
)
18695 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18697 if (mac_ptr
== NULL
)
18699 /* skip_form_bytes already issued the complaint. */
18707 /* A helper function which parses the header of a macro section.
18708 If the macro section is the extended (for now called "GNU") type,
18709 then this updates *OFFSET_SIZE. Returns a pointer to just after
18710 the header, or issues a complaint and returns NULL on error. */
18712 static const gdb_byte
*
18713 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
18715 const gdb_byte
*mac_ptr
,
18716 unsigned int *offset_size
,
18717 int section_is_gnu
)
18719 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18721 if (section_is_gnu
)
18723 unsigned int version
, flags
;
18725 version
= read_2_bytes (abfd
, mac_ptr
);
18728 complaint (&symfile_complaints
,
18729 _("unrecognized version `%d' in .debug_macro section"),
18735 flags
= read_1_byte (abfd
, mac_ptr
);
18737 *offset_size
= (flags
& 1) ? 8 : 4;
18739 if ((flags
& 2) != 0)
18740 /* We don't need the line table offset. */
18741 mac_ptr
+= *offset_size
;
18743 /* Vendor opcode descriptions. */
18744 if ((flags
& 4) != 0)
18746 unsigned int i
, count
;
18748 count
= read_1_byte (abfd
, mac_ptr
);
18750 for (i
= 0; i
< count
; ++i
)
18752 unsigned int opcode
, bytes_read
;
18755 opcode
= read_1_byte (abfd
, mac_ptr
);
18757 opcode_definitions
[opcode
] = mac_ptr
;
18758 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18759 mac_ptr
+= bytes_read
;
18768 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18769 including DW_MACRO_GNU_transparent_include. */
18772 dwarf_decode_macro_bytes (bfd
*abfd
,
18773 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
18774 struct macro_source_file
*current_file
,
18775 struct line_header
*lh
, const char *comp_dir
,
18776 struct dwarf2_section_info
*section
,
18777 int section_is_gnu
, int section_is_dwz
,
18778 unsigned int offset_size
,
18779 struct objfile
*objfile
,
18780 htab_t include_hash
)
18782 enum dwarf_macro_record_type macinfo_type
;
18783 int at_commandline
;
18784 const gdb_byte
*opcode_definitions
[256];
18786 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18787 &offset_size
, section_is_gnu
);
18788 if (mac_ptr
== NULL
)
18790 /* We already issued a complaint. */
18794 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18795 GDB is still reading the definitions from command line. First
18796 DW_MACINFO_start_file will need to be ignored as it was already executed
18797 to create CURRENT_FILE for the main source holding also the command line
18798 definitions. On first met DW_MACINFO_start_file this flag is reset to
18799 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18801 at_commandline
= 1;
18805 /* Do we at least have room for a macinfo type byte? */
18806 if (mac_ptr
>= mac_end
)
18808 dwarf2_section_buffer_overflow_complaint (section
);
18812 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18815 /* Note that we rely on the fact that the corresponding GNU and
18816 DWARF constants are the same. */
18817 switch (macinfo_type
)
18819 /* A zero macinfo type indicates the end of the macro
18824 case DW_MACRO_GNU_define
:
18825 case DW_MACRO_GNU_undef
:
18826 case DW_MACRO_GNU_define_indirect
:
18827 case DW_MACRO_GNU_undef_indirect
:
18828 case DW_MACRO_GNU_define_indirect_alt
:
18829 case DW_MACRO_GNU_undef_indirect_alt
:
18831 unsigned int bytes_read
;
18836 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18837 mac_ptr
+= bytes_read
;
18839 if (macinfo_type
== DW_MACRO_GNU_define
18840 || macinfo_type
== DW_MACRO_GNU_undef
)
18842 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18843 mac_ptr
+= bytes_read
;
18847 LONGEST str_offset
;
18849 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18850 mac_ptr
+= offset_size
;
18852 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18853 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18856 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18858 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18861 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18864 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18865 || macinfo_type
== DW_MACRO_GNU_define_indirect
18866 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18867 if (! current_file
)
18869 /* DWARF violation as no main source is present. */
18870 complaint (&symfile_complaints
,
18871 _("debug info with no main source gives macro %s "
18873 is_define
? _("definition") : _("undefinition"),
18877 if ((line
== 0 && !at_commandline
)
18878 || (line
!= 0 && at_commandline
))
18879 complaint (&symfile_complaints
,
18880 _("debug info gives %s macro %s with %s line %d: %s"),
18881 at_commandline
? _("command-line") : _("in-file"),
18882 is_define
? _("definition") : _("undefinition"),
18883 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18886 parse_macro_definition (current_file
, line
, body
);
18889 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18890 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18891 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18892 macro_undef (current_file
, line
, body
);
18897 case DW_MACRO_GNU_start_file
:
18899 unsigned int bytes_read
;
18902 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18903 mac_ptr
+= bytes_read
;
18904 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18905 mac_ptr
+= bytes_read
;
18907 if ((line
== 0 && !at_commandline
)
18908 || (line
!= 0 && at_commandline
))
18909 complaint (&symfile_complaints
,
18910 _("debug info gives source %d included "
18911 "from %s at %s line %d"),
18912 file
, at_commandline
? _("command-line") : _("file"),
18913 line
== 0 ? _("zero") : _("non-zero"), line
);
18915 if (at_commandline
)
18917 /* This DW_MACRO_GNU_start_file was executed in the
18919 at_commandline
= 0;
18922 current_file
= macro_start_file (file
, line
,
18923 current_file
, comp_dir
,
18928 case DW_MACRO_GNU_end_file
:
18929 if (! current_file
)
18930 complaint (&symfile_complaints
,
18931 _("macro debug info has an unmatched "
18932 "`close_file' directive"));
18935 current_file
= current_file
->included_by
;
18936 if (! current_file
)
18938 enum dwarf_macro_record_type next_type
;
18940 /* GCC circa March 2002 doesn't produce the zero
18941 type byte marking the end of the compilation
18942 unit. Complain if it's not there, but exit no
18945 /* Do we at least have room for a macinfo type byte? */
18946 if (mac_ptr
>= mac_end
)
18948 dwarf2_section_buffer_overflow_complaint (section
);
18952 /* We don't increment mac_ptr here, so this is just
18954 next_type
= read_1_byte (abfd
, mac_ptr
);
18955 if (next_type
!= 0)
18956 complaint (&symfile_complaints
,
18957 _("no terminating 0-type entry for "
18958 "macros in `.debug_macinfo' section"));
18965 case DW_MACRO_GNU_transparent_include
:
18966 case DW_MACRO_GNU_transparent_include_alt
:
18970 bfd
*include_bfd
= abfd
;
18971 struct dwarf2_section_info
*include_section
= section
;
18972 struct dwarf2_section_info alt_section
;
18973 const gdb_byte
*include_mac_end
= mac_end
;
18974 int is_dwz
= section_is_dwz
;
18975 const gdb_byte
*new_mac_ptr
;
18977 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18978 mac_ptr
+= offset_size
;
18980 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18982 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18984 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18987 include_bfd
= dwz
->macro
.asection
->owner
;
18988 include_section
= &dwz
->macro
;
18989 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18993 new_mac_ptr
= include_section
->buffer
+ offset
;
18994 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18998 /* This has actually happened; see
18999 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
19000 complaint (&symfile_complaints
,
19001 _("recursive DW_MACRO_GNU_transparent_include in "
19002 ".debug_macro section"));
19006 *slot
= (void *) new_mac_ptr
;
19008 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
19009 include_mac_end
, current_file
,
19011 section
, section_is_gnu
, is_dwz
,
19012 offset_size
, objfile
, include_hash
);
19014 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
19019 case DW_MACINFO_vendor_ext
:
19020 if (!section_is_gnu
)
19022 unsigned int bytes_read
;
19025 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
19026 mac_ptr
+= bytes_read
;
19027 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
19028 mac_ptr
+= bytes_read
;
19030 /* We don't recognize any vendor extensions. */
19036 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
19037 mac_ptr
, mac_end
, abfd
, offset_size
,
19039 if (mac_ptr
== NULL
)
19043 } while (macinfo_type
!= 0);
19047 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
19048 const char *comp_dir
, int section_is_gnu
)
19050 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19051 struct line_header
*lh
= cu
->line_header
;
19053 const gdb_byte
*mac_ptr
, *mac_end
;
19054 struct macro_source_file
*current_file
= 0;
19055 enum dwarf_macro_record_type macinfo_type
;
19056 unsigned int offset_size
= cu
->header
.offset_size
;
19057 const gdb_byte
*opcode_definitions
[256];
19058 struct cleanup
*cleanup
;
19059 htab_t include_hash
;
19061 struct dwarf2_section_info
*section
;
19062 const char *section_name
;
19064 if (cu
->dwo_unit
!= NULL
)
19066 if (section_is_gnu
)
19068 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
19069 section_name
= ".debug_macro.dwo";
19073 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
19074 section_name
= ".debug_macinfo.dwo";
19079 if (section_is_gnu
)
19081 section
= &dwarf2_per_objfile
->macro
;
19082 section_name
= ".debug_macro";
19086 section
= &dwarf2_per_objfile
->macinfo
;
19087 section_name
= ".debug_macinfo";
19091 dwarf2_read_section (objfile
, section
);
19092 if (section
->buffer
== NULL
)
19094 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
19097 abfd
= section
->asection
->owner
;
19099 /* First pass: Find the name of the base filename.
19100 This filename is needed in order to process all macros whose definition
19101 (or undefinition) comes from the command line. These macros are defined
19102 before the first DW_MACINFO_start_file entry, and yet still need to be
19103 associated to the base file.
19105 To determine the base file name, we scan the macro definitions until we
19106 reach the first DW_MACINFO_start_file entry. We then initialize
19107 CURRENT_FILE accordingly so that any macro definition found before the
19108 first DW_MACINFO_start_file can still be associated to the base file. */
19110 mac_ptr
= section
->buffer
+ offset
;
19111 mac_end
= section
->buffer
+ section
->size
;
19113 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
19114 &offset_size
, section_is_gnu
);
19115 if (mac_ptr
== NULL
)
19117 /* We already issued a complaint. */
19123 /* Do we at least have room for a macinfo type byte? */
19124 if (mac_ptr
>= mac_end
)
19126 /* Complaint is printed during the second pass as GDB will probably
19127 stop the first pass earlier upon finding
19128 DW_MACINFO_start_file. */
19132 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
19135 /* Note that we rely on the fact that the corresponding GNU and
19136 DWARF constants are the same. */
19137 switch (macinfo_type
)
19139 /* A zero macinfo type indicates the end of the macro
19144 case DW_MACRO_GNU_define
:
19145 case DW_MACRO_GNU_undef
:
19146 /* Only skip the data by MAC_PTR. */
19148 unsigned int bytes_read
;
19150 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
19151 mac_ptr
+= bytes_read
;
19152 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
19153 mac_ptr
+= bytes_read
;
19157 case DW_MACRO_GNU_start_file
:
19159 unsigned int bytes_read
;
19162 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
19163 mac_ptr
+= bytes_read
;
19164 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
19165 mac_ptr
+= bytes_read
;
19167 current_file
= macro_start_file (file
, line
, current_file
,
19168 comp_dir
, lh
, objfile
);
19172 case DW_MACRO_GNU_end_file
:
19173 /* No data to skip by MAC_PTR. */
19176 case DW_MACRO_GNU_define_indirect
:
19177 case DW_MACRO_GNU_undef_indirect
:
19178 case DW_MACRO_GNU_define_indirect_alt
:
19179 case DW_MACRO_GNU_undef_indirect_alt
:
19181 unsigned int bytes_read
;
19183 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
19184 mac_ptr
+= bytes_read
;
19185 mac_ptr
+= offset_size
;
19189 case DW_MACRO_GNU_transparent_include
:
19190 case DW_MACRO_GNU_transparent_include_alt
:
19191 /* Note that, according to the spec, a transparent include
19192 chain cannot call DW_MACRO_GNU_start_file. So, we can just
19193 skip this opcode. */
19194 mac_ptr
+= offset_size
;
19197 case DW_MACINFO_vendor_ext
:
19198 /* Only skip the data by MAC_PTR. */
19199 if (!section_is_gnu
)
19201 unsigned int bytes_read
;
19203 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
19204 mac_ptr
+= bytes_read
;
19205 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
19206 mac_ptr
+= bytes_read
;
19211 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
19212 mac_ptr
, mac_end
, abfd
, offset_size
,
19214 if (mac_ptr
== NULL
)
19218 } while (macinfo_type
!= 0 && current_file
== NULL
);
19220 /* Second pass: Process all entries.
19222 Use the AT_COMMAND_LINE flag to determine whether we are still processing
19223 command-line macro definitions/undefinitions. This flag is unset when we
19224 reach the first DW_MACINFO_start_file entry. */
19226 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
19227 NULL
, xcalloc
, xfree
);
19228 cleanup
= make_cleanup_htab_delete (include_hash
);
19229 mac_ptr
= section
->buffer
+ offset
;
19230 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
19231 *slot
= (void *) mac_ptr
;
19232 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
19233 current_file
, lh
, comp_dir
, section
,
19235 offset_size
, objfile
, include_hash
);
19236 do_cleanups (cleanup
);
19239 /* Check if the attribute's form is a DW_FORM_block*
19240 if so return true else false. */
19243 attr_form_is_block (struct attribute
*attr
)
19245 return (attr
== NULL
? 0 :
19246 attr
->form
== DW_FORM_block1
19247 || attr
->form
== DW_FORM_block2
19248 || attr
->form
== DW_FORM_block4
19249 || attr
->form
== DW_FORM_block
19250 || attr
->form
== DW_FORM_exprloc
);
19253 /* Return non-zero if ATTR's value is a section offset --- classes
19254 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
19255 You may use DW_UNSND (attr) to retrieve such offsets.
19257 Section 7.5.4, "Attribute Encodings", explains that no attribute
19258 may have a value that belongs to more than one of these classes; it
19259 would be ambiguous if we did, because we use the same forms for all
19263 attr_form_is_section_offset (struct attribute
*attr
)
19265 return (attr
->form
== DW_FORM_data4
19266 || attr
->form
== DW_FORM_data8
19267 || attr
->form
== DW_FORM_sec_offset
);
19270 /* Return non-zero if ATTR's value falls in the 'constant' class, or
19271 zero otherwise. When this function returns true, you can apply
19272 dwarf2_get_attr_constant_value to it.
19274 However, note that for some attributes you must check
19275 attr_form_is_section_offset before using this test. DW_FORM_data4
19276 and DW_FORM_data8 are members of both the constant class, and of
19277 the classes that contain offsets into other debug sections
19278 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
19279 that, if an attribute's can be either a constant or one of the
19280 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
19281 taken as section offsets, not constants. */
19284 attr_form_is_constant (struct attribute
*attr
)
19286 switch (attr
->form
)
19288 case DW_FORM_sdata
:
19289 case DW_FORM_udata
:
19290 case DW_FORM_data1
:
19291 case DW_FORM_data2
:
19292 case DW_FORM_data4
:
19293 case DW_FORM_data8
:
19300 /* Return the .debug_loc section to use for CU.
19301 For DWO files use .debug_loc.dwo. */
19303 static struct dwarf2_section_info
*
19304 cu_debug_loc_section (struct dwarf2_cu
*cu
)
19307 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
19308 return &dwarf2_per_objfile
->loc
;
19311 /* A helper function that fills in a dwarf2_loclist_baton. */
19314 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
19315 struct dwarf2_loclist_baton
*baton
,
19316 struct attribute
*attr
)
19318 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19320 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
19322 baton
->per_cu
= cu
->per_cu
;
19323 gdb_assert (baton
->per_cu
);
19324 /* We don't know how long the location list is, but make sure we
19325 don't run off the edge of the section. */
19326 baton
->size
= section
->size
- DW_UNSND (attr
);
19327 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
19328 baton
->base_address
= cu
->base_address
;
19329 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
19333 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
19334 struct dwarf2_cu
*cu
, int is_block
)
19336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19337 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19339 if (attr_form_is_section_offset (attr
)
19340 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
19341 the section. If so, fall through to the complaint in the
19343 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
19345 struct dwarf2_loclist_baton
*baton
;
19347 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19348 sizeof (struct dwarf2_loclist_baton
));
19350 fill_in_loclist_baton (cu
, baton
, attr
);
19352 if (cu
->base_known
== 0)
19353 complaint (&symfile_complaints
,
19354 _("Location list used without "
19355 "specifying the CU base address."));
19357 SYMBOL_ACLASS_INDEX (sym
) = (is_block
19358 ? dwarf2_loclist_block_index
19359 : dwarf2_loclist_index
);
19360 SYMBOL_LOCATION_BATON (sym
) = baton
;
19364 struct dwarf2_locexpr_baton
*baton
;
19366 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19367 sizeof (struct dwarf2_locexpr_baton
));
19368 baton
->per_cu
= cu
->per_cu
;
19369 gdb_assert (baton
->per_cu
);
19371 if (attr_form_is_block (attr
))
19373 /* Note that we're just copying the block's data pointer
19374 here, not the actual data. We're still pointing into the
19375 info_buffer for SYM's objfile; right now we never release
19376 that buffer, but when we do clean up properly this may
19378 baton
->size
= DW_BLOCK (attr
)->size
;
19379 baton
->data
= DW_BLOCK (attr
)->data
;
19383 dwarf2_invalid_attrib_class_complaint ("location description",
19384 SYMBOL_NATURAL_NAME (sym
));
19388 SYMBOL_ACLASS_INDEX (sym
) = (is_block
19389 ? dwarf2_locexpr_block_index
19390 : dwarf2_locexpr_index
);
19391 SYMBOL_LOCATION_BATON (sym
) = baton
;
19395 /* Return the OBJFILE associated with the compilation unit CU. If CU
19396 came from a separate debuginfo file, then the master objfile is
19400 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
19402 struct objfile
*objfile
= per_cu
->objfile
;
19404 /* Return the master objfile, so that we can report and look up the
19405 correct file containing this variable. */
19406 if (objfile
->separate_debug_objfile_backlink
)
19407 objfile
= objfile
->separate_debug_objfile_backlink
;
19412 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
19413 (CU_HEADERP is unused in such case) or prepare a temporary copy at
19414 CU_HEADERP first. */
19416 static const struct comp_unit_head
*
19417 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19418 struct dwarf2_per_cu_data
*per_cu
)
19420 const gdb_byte
*info_ptr
;
19423 return &per_cu
->cu
->header
;
19425 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
19427 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19428 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19433 /* Return the address size given in the compilation unit header for CU. */
19436 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19438 struct comp_unit_head cu_header_local
;
19439 const struct comp_unit_head
*cu_headerp
;
19441 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19443 return cu_headerp
->addr_size
;
19446 /* Return the offset size given in the compilation unit header for CU. */
19449 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19451 struct comp_unit_head cu_header_local
;
19452 const struct comp_unit_head
*cu_headerp
;
19454 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19456 return cu_headerp
->offset_size
;
19459 /* See its dwarf2loc.h declaration. */
19462 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19464 struct comp_unit_head cu_header_local
;
19465 const struct comp_unit_head
*cu_headerp
;
19467 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19469 if (cu_headerp
->version
== 2)
19470 return cu_headerp
->addr_size
;
19472 return cu_headerp
->offset_size
;
19475 /* Return the text offset of the CU. The returned offset comes from
19476 this CU's objfile. If this objfile came from a separate debuginfo
19477 file, then the offset may be different from the corresponding
19478 offset in the parent objfile. */
19481 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19483 struct objfile
*objfile
= per_cu
->objfile
;
19485 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19488 /* Locate the .debug_info compilation unit from CU's objfile which contains
19489 the DIE at OFFSET. Raises an error on failure. */
19491 static struct dwarf2_per_cu_data
*
19492 dwarf2_find_containing_comp_unit (sect_offset offset
,
19493 unsigned int offset_in_dwz
,
19494 struct objfile
*objfile
)
19496 struct dwarf2_per_cu_data
*this_cu
;
19498 const sect_offset
*cu_off
;
19501 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19504 struct dwarf2_per_cu_data
*mid_cu
;
19505 int mid
= low
+ (high
- low
) / 2;
19507 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19508 cu_off
= &mid_cu
->offset
;
19509 if (mid_cu
->is_dwz
> offset_in_dwz
19510 || (mid_cu
->is_dwz
== offset_in_dwz
19511 && cu_off
->sect_off
>= offset
.sect_off
))
19516 gdb_assert (low
== high
);
19517 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19518 cu_off
= &this_cu
->offset
;
19519 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19521 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19522 error (_("Dwarf Error: could not find partial DIE containing "
19523 "offset 0x%lx [in module %s]"),
19524 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19526 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19527 <= offset
.sect_off
);
19528 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19532 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19533 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19534 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19535 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19536 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19541 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19544 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19546 memset (cu
, 0, sizeof (*cu
));
19548 cu
->per_cu
= per_cu
;
19549 cu
->objfile
= per_cu
->objfile
;
19550 obstack_init (&cu
->comp_unit_obstack
);
19553 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19556 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19557 enum language pretend_language
)
19559 struct attribute
*attr
;
19561 /* Set the language we're debugging. */
19562 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19564 set_cu_language (DW_UNSND (attr
), cu
);
19567 cu
->language
= pretend_language
;
19568 cu
->language_defn
= language_def (cu
->language
);
19571 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19573 cu
->producer
= DW_STRING (attr
);
19576 /* Release one cached compilation unit, CU. We unlink it from the tree
19577 of compilation units, but we don't remove it from the read_in_chain;
19578 the caller is responsible for that.
19579 NOTE: DATA is a void * because this function is also used as a
19580 cleanup routine. */
19583 free_heap_comp_unit (void *data
)
19585 struct dwarf2_cu
*cu
= data
;
19587 gdb_assert (cu
->per_cu
!= NULL
);
19588 cu
->per_cu
->cu
= NULL
;
19591 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19596 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19597 when we're finished with it. We can't free the pointer itself, but be
19598 sure to unlink it from the cache. Also release any associated storage. */
19601 free_stack_comp_unit (void *data
)
19603 struct dwarf2_cu
*cu
= data
;
19605 gdb_assert (cu
->per_cu
!= NULL
);
19606 cu
->per_cu
->cu
= NULL
;
19609 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19610 cu
->partial_dies
= NULL
;
19613 /* Free all cached compilation units. */
19616 free_cached_comp_units (void *data
)
19618 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19620 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19621 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19622 while (per_cu
!= NULL
)
19624 struct dwarf2_per_cu_data
*next_cu
;
19626 next_cu
= per_cu
->cu
->read_in_chain
;
19628 free_heap_comp_unit (per_cu
->cu
);
19629 *last_chain
= next_cu
;
19635 /* Increase the age counter on each cached compilation unit, and free
19636 any that are too old. */
19639 age_cached_comp_units (void)
19641 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19643 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19644 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19645 while (per_cu
!= NULL
)
19647 per_cu
->cu
->last_used
++;
19648 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19649 dwarf2_mark (per_cu
->cu
);
19650 per_cu
= per_cu
->cu
->read_in_chain
;
19653 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19654 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19655 while (per_cu
!= NULL
)
19657 struct dwarf2_per_cu_data
*next_cu
;
19659 next_cu
= per_cu
->cu
->read_in_chain
;
19661 if (!per_cu
->cu
->mark
)
19663 free_heap_comp_unit (per_cu
->cu
);
19664 *last_chain
= next_cu
;
19667 last_chain
= &per_cu
->cu
->read_in_chain
;
19673 /* Remove a single compilation unit from the cache. */
19676 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19678 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19680 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19681 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19682 while (per_cu
!= NULL
)
19684 struct dwarf2_per_cu_data
*next_cu
;
19686 next_cu
= per_cu
->cu
->read_in_chain
;
19688 if (per_cu
== target_per_cu
)
19690 free_heap_comp_unit (per_cu
->cu
);
19692 *last_chain
= next_cu
;
19696 last_chain
= &per_cu
->cu
->read_in_chain
;
19702 /* Release all extra memory associated with OBJFILE. */
19705 dwarf2_free_objfile (struct objfile
*objfile
)
19707 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19709 if (dwarf2_per_objfile
== NULL
)
19712 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19713 free_cached_comp_units (NULL
);
19715 if (dwarf2_per_objfile
->quick_file_names_table
)
19716 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19718 /* Everything else should be on the objfile obstack. */
19721 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19722 We store these in a hash table separate from the DIEs, and preserve them
19723 when the DIEs are flushed out of cache.
19725 The CU "per_cu" pointer is needed because offset alone is not enough to
19726 uniquely identify the type. A file may have multiple .debug_types sections,
19727 or the type may come from a DWO file. Furthermore, while it's more logical
19728 to use per_cu->section+offset, with Fission the section with the data is in
19729 the DWO file but we don't know that section at the point we need it.
19730 We have to use something in dwarf2_per_cu_data (or the pointer to it)
19731 because we can enter the lookup routine, get_die_type_at_offset, from
19732 outside this file, and thus won't necessarily have PER_CU->cu.
19733 Fortunately, PER_CU is stable for the life of the objfile. */
19735 struct dwarf2_per_cu_offset_and_type
19737 const struct dwarf2_per_cu_data
*per_cu
;
19738 sect_offset offset
;
19742 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19745 per_cu_offset_and_type_hash (const void *item
)
19747 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19749 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19752 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19755 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19757 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19758 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19760 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19761 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19764 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19765 table if necessary. For convenience, return TYPE.
19767 The DIEs reading must have careful ordering to:
19768 * Not cause infite loops trying to read in DIEs as a prerequisite for
19769 reading current DIE.
19770 * Not trying to dereference contents of still incompletely read in types
19771 while reading in other DIEs.
19772 * Enable referencing still incompletely read in types just by a pointer to
19773 the type without accessing its fields.
19775 Therefore caller should follow these rules:
19776 * Try to fetch any prerequisite types we may need to build this DIE type
19777 before building the type and calling set_die_type.
19778 * After building type call set_die_type for current DIE as soon as
19779 possible before fetching more types to complete the current type.
19780 * Make the type as complete as possible before fetching more types. */
19782 static struct type
*
19783 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19785 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19786 struct objfile
*objfile
= cu
->objfile
;
19788 /* For Ada types, make sure that the gnat-specific data is always
19789 initialized (if not already set). There are a few types where
19790 we should not be doing so, because the type-specific area is
19791 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19792 where the type-specific area is used to store the floatformat).
19793 But this is not a problem, because the gnat-specific information
19794 is actually not needed for these types. */
19795 if (need_gnat_info (cu
)
19796 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19797 && TYPE_CODE (type
) != TYPE_CODE_FLT
19798 && !HAVE_GNAT_AUX_INFO (type
))
19799 INIT_GNAT_SPECIFIC (type
);
19801 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19803 dwarf2_per_objfile
->die_type_hash
=
19804 htab_create_alloc_ex (127,
19805 per_cu_offset_and_type_hash
,
19806 per_cu_offset_and_type_eq
,
19808 &objfile
->objfile_obstack
,
19809 hashtab_obstack_allocate
,
19810 dummy_obstack_deallocate
);
19813 ofs
.per_cu
= cu
->per_cu
;
19814 ofs
.offset
= die
->offset
;
19816 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19817 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19819 complaint (&symfile_complaints
,
19820 _("A problem internal to GDB: DIE 0x%x has type already set"),
19821 die
->offset
.sect_off
);
19822 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19827 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
19828 or return NULL if the die does not have a saved type. */
19830 static struct type
*
19831 get_die_type_at_offset (sect_offset offset
,
19832 struct dwarf2_per_cu_data
*per_cu
)
19834 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19836 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19839 ofs
.per_cu
= per_cu
;
19840 ofs
.offset
= offset
;
19841 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19848 /* Look up the type for DIE in CU in die_type_hash,
19849 or return NULL if DIE does not have a saved type. */
19851 static struct type
*
19852 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19854 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19857 /* Add a dependence relationship from CU to REF_PER_CU. */
19860 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19861 struct dwarf2_per_cu_data
*ref_per_cu
)
19865 if (cu
->dependencies
== NULL
)
19867 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19868 NULL
, &cu
->comp_unit_obstack
,
19869 hashtab_obstack_allocate
,
19870 dummy_obstack_deallocate
);
19872 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19874 *slot
= ref_per_cu
;
19877 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19878 Set the mark field in every compilation unit in the
19879 cache that we must keep because we are keeping CU. */
19882 dwarf2_mark_helper (void **slot
, void *data
)
19884 struct dwarf2_per_cu_data
*per_cu
;
19886 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19888 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19889 reading of the chain. As such dependencies remain valid it is not much
19890 useful to track and undo them during QUIT cleanups. */
19891 if (per_cu
->cu
== NULL
)
19894 if (per_cu
->cu
->mark
)
19896 per_cu
->cu
->mark
= 1;
19898 if (per_cu
->cu
->dependencies
!= NULL
)
19899 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19904 /* Set the mark field in CU and in every other compilation unit in the
19905 cache that we must keep because we are keeping CU. */
19908 dwarf2_mark (struct dwarf2_cu
*cu
)
19913 if (cu
->dependencies
!= NULL
)
19914 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19918 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19922 per_cu
->cu
->mark
= 0;
19923 per_cu
= per_cu
->cu
->read_in_chain
;
19927 /* Trivial hash function for partial_die_info: the hash value of a DIE
19928 is its offset in .debug_info for this objfile. */
19931 partial_die_hash (const void *item
)
19933 const struct partial_die_info
*part_die
= item
;
19935 return part_die
->offset
.sect_off
;
19938 /* Trivial comparison function for partial_die_info structures: two DIEs
19939 are equal if they have the same offset. */
19942 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19944 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19945 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19947 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19950 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19951 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19954 set_dwarf2_cmd (char *args
, int from_tty
)
19956 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19960 show_dwarf2_cmd (char *args
, int from_tty
)
19962 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19965 /* Free data associated with OBJFILE, if necessary. */
19968 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19970 struct dwarf2_per_objfile
*data
= d
;
19973 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19974 VEC_free (dwarf2_per_cu_ptr
,
19975 dwarf2_per_objfile
->all_comp_units
[ix
]->imported_symtabs
);
19977 for (ix
= 0; ix
< dwarf2_per_objfile
->n_type_units
; ++ix
)
19978 VEC_free (dwarf2_per_cu_ptr
,
19979 dwarf2_per_objfile
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
19981 VEC_free (dwarf2_section_info_def
, data
->types
);
19983 if (data
->dwo_files
)
19984 free_dwo_files (data
->dwo_files
, objfile
);
19985 if (data
->dwp_file
)
19986 gdb_bfd_unref (data
->dwp_file
->dbfd
);
19988 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19989 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19993 /* The "save gdb-index" command. */
19995 /* The contents of the hash table we create when building the string
19997 struct strtab_entry
19999 offset_type offset
;
20003 /* Hash function for a strtab_entry.
20005 Function is used only during write_hash_table so no index format backward
20006 compatibility is needed. */
20009 hash_strtab_entry (const void *e
)
20011 const struct strtab_entry
*entry
= e
;
20012 return mapped_index_string_hash (INT_MAX
, entry
->str
);
20015 /* Equality function for a strtab_entry. */
20018 eq_strtab_entry (const void *a
, const void *b
)
20020 const struct strtab_entry
*ea
= a
;
20021 const struct strtab_entry
*eb
= b
;
20022 return !strcmp (ea
->str
, eb
->str
);
20025 /* Create a strtab_entry hash table. */
20028 create_strtab (void)
20030 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
20031 xfree
, xcalloc
, xfree
);
20034 /* Add a string to the constant pool. Return the string's offset in
20038 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
20041 struct strtab_entry entry
;
20042 struct strtab_entry
*result
;
20045 slot
= htab_find_slot (table
, &entry
, INSERT
);
20050 result
= XNEW (struct strtab_entry
);
20051 result
->offset
= obstack_object_size (cpool
);
20053 obstack_grow_str0 (cpool
, str
);
20056 return result
->offset
;
20059 /* An entry in the symbol table. */
20060 struct symtab_index_entry
20062 /* The name of the symbol. */
20064 /* The offset of the name in the constant pool. */
20065 offset_type index_offset
;
20066 /* A sorted vector of the indices of all the CUs that hold an object
20068 VEC (offset_type
) *cu_indices
;
20071 /* The symbol table. This is a power-of-2-sized hash table. */
20072 struct mapped_symtab
20074 offset_type n_elements
;
20076 struct symtab_index_entry
**data
;
20079 /* Hash function for a symtab_index_entry. */
20082 hash_symtab_entry (const void *e
)
20084 const struct symtab_index_entry
*entry
= e
;
20085 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
20086 sizeof (offset_type
) * VEC_length (offset_type
,
20087 entry
->cu_indices
),
20091 /* Equality function for a symtab_index_entry. */
20094 eq_symtab_entry (const void *a
, const void *b
)
20096 const struct symtab_index_entry
*ea
= a
;
20097 const struct symtab_index_entry
*eb
= b
;
20098 int len
= VEC_length (offset_type
, ea
->cu_indices
);
20099 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
20101 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
20102 VEC_address (offset_type
, eb
->cu_indices
),
20103 sizeof (offset_type
) * len
);
20106 /* Destroy a symtab_index_entry. */
20109 delete_symtab_entry (void *p
)
20111 struct symtab_index_entry
*entry
= p
;
20112 VEC_free (offset_type
, entry
->cu_indices
);
20116 /* Create a hash table holding symtab_index_entry objects. */
20119 create_symbol_hash_table (void)
20121 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
20122 delete_symtab_entry
, xcalloc
, xfree
);
20125 /* Create a new mapped symtab object. */
20127 static struct mapped_symtab
*
20128 create_mapped_symtab (void)
20130 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
20131 symtab
->n_elements
= 0;
20132 symtab
->size
= 1024;
20133 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
20137 /* Destroy a mapped_symtab. */
20140 cleanup_mapped_symtab (void *p
)
20142 struct mapped_symtab
*symtab
= p
;
20143 /* The contents of the array are freed when the other hash table is
20145 xfree (symtab
->data
);
20149 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
20152 Function is used only during write_hash_table so no index format backward
20153 compatibility is needed. */
20155 static struct symtab_index_entry
**
20156 find_slot (struct mapped_symtab
*symtab
, const char *name
)
20158 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
20160 index
= hash
& (symtab
->size
- 1);
20161 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
20165 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
20166 return &symtab
->data
[index
];
20167 index
= (index
+ step
) & (symtab
->size
- 1);
20171 /* Expand SYMTAB's hash table. */
20174 hash_expand (struct mapped_symtab
*symtab
)
20176 offset_type old_size
= symtab
->size
;
20178 struct symtab_index_entry
**old_entries
= symtab
->data
;
20181 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
20183 for (i
= 0; i
< old_size
; ++i
)
20185 if (old_entries
[i
])
20187 struct symtab_index_entry
**slot
= find_slot (symtab
,
20188 old_entries
[i
]->name
);
20189 *slot
= old_entries
[i
];
20193 xfree (old_entries
);
20196 /* Add an entry to SYMTAB. NAME is the name of the symbol.
20197 CU_INDEX is the index of the CU in which the symbol appears.
20198 IS_STATIC is one if the symbol is static, otherwise zero (global). */
20201 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
20202 int is_static
, gdb_index_symbol_kind kind
,
20203 offset_type cu_index
)
20205 struct symtab_index_entry
**slot
;
20206 offset_type cu_index_and_attrs
;
20208 ++symtab
->n_elements
;
20209 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
20210 hash_expand (symtab
);
20212 slot
= find_slot (symtab
, name
);
20215 *slot
= XNEW (struct symtab_index_entry
);
20216 (*slot
)->name
= name
;
20217 /* index_offset is set later. */
20218 (*slot
)->cu_indices
= NULL
;
20221 cu_index_and_attrs
= 0;
20222 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
20223 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
20224 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
20226 /* We don't want to record an index value twice as we want to avoid the
20228 We process all global symbols and then all static symbols
20229 (which would allow us to avoid the duplication by only having to check
20230 the last entry pushed), but a symbol could have multiple kinds in one CU.
20231 To keep things simple we don't worry about the duplication here and
20232 sort and uniqufy the list after we've processed all symbols. */
20233 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
20236 /* qsort helper routine for uniquify_cu_indices. */
20239 offset_type_compare (const void *ap
, const void *bp
)
20241 offset_type a
= *(offset_type
*) ap
;
20242 offset_type b
= *(offset_type
*) bp
;
20244 return (a
> b
) - (b
> a
);
20247 /* Sort and remove duplicates of all symbols' cu_indices lists. */
20250 uniquify_cu_indices (struct mapped_symtab
*symtab
)
20254 for (i
= 0; i
< symtab
->size
; ++i
)
20256 struct symtab_index_entry
*entry
= symtab
->data
[i
];
20259 && entry
->cu_indices
!= NULL
)
20261 unsigned int next_to_insert
, next_to_check
;
20262 offset_type last_value
;
20264 qsort (VEC_address (offset_type
, entry
->cu_indices
),
20265 VEC_length (offset_type
, entry
->cu_indices
),
20266 sizeof (offset_type
), offset_type_compare
);
20268 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
20269 next_to_insert
= 1;
20270 for (next_to_check
= 1;
20271 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
20274 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
20277 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
20279 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
20284 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
20289 /* Add a vector of indices to the constant pool. */
20292 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
20293 struct symtab_index_entry
*entry
)
20297 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
20300 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
20301 offset_type val
= MAYBE_SWAP (len
);
20306 entry
->index_offset
= obstack_object_size (cpool
);
20308 obstack_grow (cpool
, &val
, sizeof (val
));
20310 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
20313 val
= MAYBE_SWAP (iter
);
20314 obstack_grow (cpool
, &val
, sizeof (val
));
20319 struct symtab_index_entry
*old_entry
= *slot
;
20320 entry
->index_offset
= old_entry
->index_offset
;
20323 return entry
->index_offset
;
20326 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
20327 constant pool entries going into the obstack CPOOL. */
20330 write_hash_table (struct mapped_symtab
*symtab
,
20331 struct obstack
*output
, struct obstack
*cpool
)
20334 htab_t symbol_hash_table
;
20337 symbol_hash_table
= create_symbol_hash_table ();
20338 str_table
= create_strtab ();
20340 /* We add all the index vectors to the constant pool first, to
20341 ensure alignment is ok. */
20342 for (i
= 0; i
< symtab
->size
; ++i
)
20344 if (symtab
->data
[i
])
20345 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
20348 /* Now write out the hash table. */
20349 for (i
= 0; i
< symtab
->size
; ++i
)
20351 offset_type str_off
, vec_off
;
20353 if (symtab
->data
[i
])
20355 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
20356 vec_off
= symtab
->data
[i
]->index_offset
;
20360 /* While 0 is a valid constant pool index, it is not valid
20361 to have 0 for both offsets. */
20366 str_off
= MAYBE_SWAP (str_off
);
20367 vec_off
= MAYBE_SWAP (vec_off
);
20369 obstack_grow (output
, &str_off
, sizeof (str_off
));
20370 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
20373 htab_delete (str_table
);
20374 htab_delete (symbol_hash_table
);
20377 /* Struct to map psymtab to CU index in the index file. */
20378 struct psymtab_cu_index_map
20380 struct partial_symtab
*psymtab
;
20381 unsigned int cu_index
;
20385 hash_psymtab_cu_index (const void *item
)
20387 const struct psymtab_cu_index_map
*map
= item
;
20389 return htab_hash_pointer (map
->psymtab
);
20393 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
20395 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
20396 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
20398 return lhs
->psymtab
== rhs
->psymtab
;
20401 /* Helper struct for building the address table. */
20402 struct addrmap_index_data
20404 struct objfile
*objfile
;
20405 struct obstack
*addr_obstack
;
20406 htab_t cu_index_htab
;
20408 /* Non-zero if the previous_* fields are valid.
20409 We can't write an entry until we see the next entry (since it is only then
20410 that we know the end of the entry). */
20411 int previous_valid
;
20412 /* Index of the CU in the table of all CUs in the index file. */
20413 unsigned int previous_cu_index
;
20414 /* Start address of the CU. */
20415 CORE_ADDR previous_cu_start
;
20418 /* Write an address entry to OBSTACK. */
20421 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
20422 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
20424 offset_type cu_index_to_write
;
20426 CORE_ADDR baseaddr
;
20428 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20430 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20431 obstack_grow (obstack
, addr
, 8);
20432 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20433 obstack_grow (obstack
, addr
, 8);
20434 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20435 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20438 /* Worker function for traversing an addrmap to build the address table. */
20441 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20443 struct addrmap_index_data
*data
= datap
;
20444 struct partial_symtab
*pst
= obj
;
20446 if (data
->previous_valid
)
20447 add_address_entry (data
->objfile
, data
->addr_obstack
,
20448 data
->previous_cu_start
, start_addr
,
20449 data
->previous_cu_index
);
20451 data
->previous_cu_start
= start_addr
;
20454 struct psymtab_cu_index_map find_map
, *map
;
20455 find_map
.psymtab
= pst
;
20456 map
= htab_find (data
->cu_index_htab
, &find_map
);
20457 gdb_assert (map
!= NULL
);
20458 data
->previous_cu_index
= map
->cu_index
;
20459 data
->previous_valid
= 1;
20462 data
->previous_valid
= 0;
20467 /* Write OBJFILE's address map to OBSTACK.
20468 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20469 in the index file. */
20472 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20473 htab_t cu_index_htab
)
20475 struct addrmap_index_data addrmap_index_data
;
20477 /* When writing the address table, we have to cope with the fact that
20478 the addrmap iterator only provides the start of a region; we have to
20479 wait until the next invocation to get the start of the next region. */
20481 addrmap_index_data
.objfile
= objfile
;
20482 addrmap_index_data
.addr_obstack
= obstack
;
20483 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20484 addrmap_index_data
.previous_valid
= 0;
20486 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20487 &addrmap_index_data
);
20489 /* It's highly unlikely the last entry (end address = 0xff...ff)
20490 is valid, but we should still handle it.
20491 The end address is recorded as the start of the next region, but that
20492 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20494 if (addrmap_index_data
.previous_valid
)
20495 add_address_entry (objfile
, obstack
,
20496 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20497 addrmap_index_data
.previous_cu_index
);
20500 /* Return the symbol kind of PSYM. */
20502 static gdb_index_symbol_kind
20503 symbol_kind (struct partial_symbol
*psym
)
20505 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20506 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20514 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20516 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20518 case LOC_CONST_BYTES
:
20519 case LOC_OPTIMIZED_OUT
:
20521 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20523 /* Note: It's currently impossible to recognize psyms as enum values
20524 short of reading the type info. For now punt. */
20525 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20527 /* There are other LOC_FOO values that one might want to classify
20528 as variables, but dwarf2read.c doesn't currently use them. */
20529 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20531 case STRUCT_DOMAIN
:
20532 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20534 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20538 /* Add a list of partial symbols to SYMTAB. */
20541 write_psymbols (struct mapped_symtab
*symtab
,
20543 struct partial_symbol
**psymp
,
20545 offset_type cu_index
,
20548 for (; count
-- > 0; ++psymp
)
20550 struct partial_symbol
*psym
= *psymp
;
20553 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20554 error (_("Ada is not currently supported by the index"));
20556 /* Only add a given psymbol once. */
20557 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20560 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20563 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20564 is_static
, kind
, cu_index
);
20569 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20570 exception if there is an error. */
20573 write_obstack (FILE *file
, struct obstack
*obstack
)
20575 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20577 != obstack_object_size (obstack
))
20578 error (_("couldn't data write to file"));
20581 /* Unlink a file if the argument is not NULL. */
20584 unlink_if_set (void *p
)
20586 char **filename
= p
;
20588 unlink (*filename
);
20591 /* A helper struct used when iterating over debug_types. */
20592 struct signatured_type_index_data
20594 struct objfile
*objfile
;
20595 struct mapped_symtab
*symtab
;
20596 struct obstack
*types_list
;
20601 /* A helper function that writes a single signatured_type to an
20605 write_one_signatured_type (void **slot
, void *d
)
20607 struct signatured_type_index_data
*info
= d
;
20608 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20609 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
20612 write_psymbols (info
->symtab
,
20614 info
->objfile
->global_psymbols
.list
20615 + psymtab
->globals_offset
,
20616 psymtab
->n_global_syms
, info
->cu_index
,
20618 write_psymbols (info
->symtab
,
20620 info
->objfile
->static_psymbols
.list
20621 + psymtab
->statics_offset
,
20622 psymtab
->n_static_syms
, info
->cu_index
,
20625 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20626 entry
->per_cu
.offset
.sect_off
);
20627 obstack_grow (info
->types_list
, val
, 8);
20628 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20629 entry
->type_offset_in_tu
.cu_off
);
20630 obstack_grow (info
->types_list
, val
, 8);
20631 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20632 obstack_grow (info
->types_list
, val
, 8);
20639 /* Recurse into all "included" dependencies and write their symbols as
20640 if they appeared in this psymtab. */
20643 recursively_write_psymbols (struct objfile
*objfile
,
20644 struct partial_symtab
*psymtab
,
20645 struct mapped_symtab
*symtab
,
20647 offset_type cu_index
)
20651 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20652 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20653 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20654 symtab
, psyms_seen
, cu_index
);
20656 write_psymbols (symtab
,
20658 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20659 psymtab
->n_global_syms
, cu_index
,
20661 write_psymbols (symtab
,
20663 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20664 psymtab
->n_static_syms
, cu_index
,
20668 /* Create an index file for OBJFILE in the directory DIR. */
20671 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20673 struct cleanup
*cleanup
;
20674 char *filename
, *cleanup_filename
;
20675 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20676 struct obstack cu_list
, types_cu_list
;
20679 struct mapped_symtab
*symtab
;
20680 offset_type val
, size_of_contents
, total_len
;
20683 htab_t cu_index_htab
;
20684 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20686 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20689 if (dwarf2_per_objfile
->using_index
)
20690 error (_("Cannot use an index to create the index"));
20692 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20693 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20695 if (stat (objfile
->name
, &st
) < 0)
20696 perror_with_name (objfile
->name
);
20698 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20699 INDEX_SUFFIX
, (char *) NULL
);
20700 cleanup
= make_cleanup (xfree
, filename
);
20702 out_file
= gdb_fopen_cloexec (filename
, "wb");
20704 error (_("Can't open `%s' for writing"), filename
);
20706 cleanup_filename
= filename
;
20707 make_cleanup (unlink_if_set
, &cleanup_filename
);
20709 symtab
= create_mapped_symtab ();
20710 make_cleanup (cleanup_mapped_symtab
, symtab
);
20712 obstack_init (&addr_obstack
);
20713 make_cleanup_obstack_free (&addr_obstack
);
20715 obstack_init (&cu_list
);
20716 make_cleanup_obstack_free (&cu_list
);
20718 obstack_init (&types_cu_list
);
20719 make_cleanup_obstack_free (&types_cu_list
);
20721 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20722 NULL
, xcalloc
, xfree
);
20723 make_cleanup_htab_delete (psyms_seen
);
20725 /* While we're scanning CU's create a table that maps a psymtab pointer
20726 (which is what addrmap records) to its index (which is what is recorded
20727 in the index file). This will later be needed to write the address
20729 cu_index_htab
= htab_create_alloc (100,
20730 hash_psymtab_cu_index
,
20731 eq_psymtab_cu_index
,
20732 NULL
, xcalloc
, xfree
);
20733 make_cleanup_htab_delete (cu_index_htab
);
20734 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20735 xmalloc (sizeof (struct psymtab_cu_index_map
)
20736 * dwarf2_per_objfile
->n_comp_units
);
20737 make_cleanup (xfree
, psymtab_cu_index_map
);
20739 /* The CU list is already sorted, so we don't need to do additional
20740 work here. Also, the debug_types entries do not appear in
20741 all_comp_units, but only in their own hash table. */
20742 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20744 struct dwarf2_per_cu_data
*per_cu
20745 = dwarf2_per_objfile
->all_comp_units
[i
];
20746 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20748 struct psymtab_cu_index_map
*map
;
20751 if (psymtab
->user
== NULL
)
20752 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20754 map
= &psymtab_cu_index_map
[i
];
20755 map
->psymtab
= psymtab
;
20757 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20758 gdb_assert (slot
!= NULL
);
20759 gdb_assert (*slot
== NULL
);
20762 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20763 per_cu
->offset
.sect_off
);
20764 obstack_grow (&cu_list
, val
, 8);
20765 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20766 obstack_grow (&cu_list
, val
, 8);
20769 /* Dump the address map. */
20770 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20772 /* Write out the .debug_type entries, if any. */
20773 if (dwarf2_per_objfile
->signatured_types
)
20775 struct signatured_type_index_data sig_data
;
20777 sig_data
.objfile
= objfile
;
20778 sig_data
.symtab
= symtab
;
20779 sig_data
.types_list
= &types_cu_list
;
20780 sig_data
.psyms_seen
= psyms_seen
;
20781 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20782 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20783 write_one_signatured_type
, &sig_data
);
20786 /* Now that we've processed all symbols we can shrink their cu_indices
20788 uniquify_cu_indices (symtab
);
20790 obstack_init (&constant_pool
);
20791 make_cleanup_obstack_free (&constant_pool
);
20792 obstack_init (&symtab_obstack
);
20793 make_cleanup_obstack_free (&symtab_obstack
);
20794 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20796 obstack_init (&contents
);
20797 make_cleanup_obstack_free (&contents
);
20798 size_of_contents
= 6 * sizeof (offset_type
);
20799 total_len
= size_of_contents
;
20801 /* The version number. */
20802 val
= MAYBE_SWAP (8);
20803 obstack_grow (&contents
, &val
, sizeof (val
));
20805 /* The offset of the CU list from the start of the file. */
20806 val
= MAYBE_SWAP (total_len
);
20807 obstack_grow (&contents
, &val
, sizeof (val
));
20808 total_len
+= obstack_object_size (&cu_list
);
20810 /* The offset of the types CU list from the start of the file. */
20811 val
= MAYBE_SWAP (total_len
);
20812 obstack_grow (&contents
, &val
, sizeof (val
));
20813 total_len
+= obstack_object_size (&types_cu_list
);
20815 /* The offset of the address table from the start of the file. */
20816 val
= MAYBE_SWAP (total_len
);
20817 obstack_grow (&contents
, &val
, sizeof (val
));
20818 total_len
+= obstack_object_size (&addr_obstack
);
20820 /* The offset of the symbol table from the start of the file. */
20821 val
= MAYBE_SWAP (total_len
);
20822 obstack_grow (&contents
, &val
, sizeof (val
));
20823 total_len
+= obstack_object_size (&symtab_obstack
);
20825 /* The offset of the constant pool from the start of the file. */
20826 val
= MAYBE_SWAP (total_len
);
20827 obstack_grow (&contents
, &val
, sizeof (val
));
20828 total_len
+= obstack_object_size (&constant_pool
);
20830 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20832 write_obstack (out_file
, &contents
);
20833 write_obstack (out_file
, &cu_list
);
20834 write_obstack (out_file
, &types_cu_list
);
20835 write_obstack (out_file
, &addr_obstack
);
20836 write_obstack (out_file
, &symtab_obstack
);
20837 write_obstack (out_file
, &constant_pool
);
20841 /* We want to keep the file, so we set cleanup_filename to NULL
20842 here. See unlink_if_set. */
20843 cleanup_filename
= NULL
;
20845 do_cleanups (cleanup
);
20848 /* Implementation of the `save gdb-index' command.
20850 Note that the file format used by this command is documented in the
20851 GDB manual. Any changes here must be documented there. */
20854 save_gdb_index_command (char *arg
, int from_tty
)
20856 struct objfile
*objfile
;
20859 error (_("usage: save gdb-index DIRECTORY"));
20861 ALL_OBJFILES (objfile
)
20865 /* If the objfile does not correspond to an actual file, skip it. */
20866 if (stat (objfile
->name
, &st
) < 0)
20869 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20870 if (dwarf2_per_objfile
)
20872 volatile struct gdb_exception except
;
20874 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20876 write_psymtabs_to_index (objfile
, arg
);
20878 if (except
.reason
< 0)
20879 exception_fprintf (gdb_stderr
, except
,
20880 _("Error while writing index for `%s': "),
20888 int dwarf2_always_disassemble
;
20891 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20892 struct cmd_list_element
*c
, const char *value
)
20894 fprintf_filtered (file
,
20895 _("Whether to always disassemble "
20896 "DWARF expressions is %s.\n"),
20901 show_check_physname (struct ui_file
*file
, int from_tty
,
20902 struct cmd_list_element
*c
, const char *value
)
20904 fprintf_filtered (file
,
20905 _("Whether to check \"physname\" is %s.\n"),
20909 void _initialize_dwarf2_read (void);
20912 _initialize_dwarf2_read (void)
20914 struct cmd_list_element
*c
;
20916 dwarf2_objfile_data_key
20917 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20919 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20920 Set DWARF 2 specific variables.\n\
20921 Configure DWARF 2 variables such as the cache size"),
20922 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20923 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20925 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20926 Show DWARF 2 specific variables\n\
20927 Show DWARF 2 variables such as the cache size"),
20928 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20929 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20931 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20932 &dwarf2_max_cache_age
, _("\
20933 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20934 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20935 A higher limit means that cached compilation units will be stored\n\
20936 in memory longer, and more total memory will be used. Zero disables\n\
20937 caching, which can slow down startup."),
20939 show_dwarf2_max_cache_age
,
20940 &set_dwarf2_cmdlist
,
20941 &show_dwarf2_cmdlist
);
20943 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20944 &dwarf2_always_disassemble
, _("\
20945 Set whether `info address' always disassembles DWARF expressions."), _("\
20946 Show whether `info address' always disassembles DWARF expressions."), _("\
20947 When enabled, DWARF expressions are always printed in an assembly-like\n\
20948 syntax. When disabled, expressions will be printed in a more\n\
20949 conversational style, when possible."),
20951 show_dwarf2_always_disassemble
,
20952 &set_dwarf2_cmdlist
,
20953 &show_dwarf2_cmdlist
);
20955 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20956 Set debugging of the dwarf2 reader."), _("\
20957 Show debugging of the dwarf2 reader."), _("\
20958 When enabled, debugging messages are printed during dwarf2 reading\n\
20959 and symtab expansion."),
20962 &setdebuglist
, &showdebuglist
);
20964 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20965 Set debugging of the dwarf2 DIE reader."), _("\
20966 Show debugging of the dwarf2 DIE reader."), _("\
20967 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20968 The value is the maximum depth to print."),
20971 &setdebuglist
, &showdebuglist
);
20973 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20974 Set cross-checking of \"physname\" code against demangler."), _("\
20975 Show cross-checking of \"physname\" code against demangler."), _("\
20976 When enabled, GDB's internal \"physname\" code is checked against\n\
20978 NULL
, show_check_physname
,
20979 &setdebuglist
, &showdebuglist
);
20981 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20982 no_class
, &use_deprecated_index_sections
, _("\
20983 Set whether to use deprecated gdb_index sections."), _("\
20984 Show whether to use deprecated gdb_index sections."), _("\
20985 When enabled, deprecated .gdb_index sections are used anyway.\n\
20986 Normally they are ignored either because of a missing feature or\n\
20987 performance issue.\n\
20988 Warning: This option must be enabled before gdb reads the file."),
20991 &setlist
, &showlist
);
20993 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20995 Save a gdb-index file.\n\
20996 Usage: save gdb-index DIRECTORY"),
20998 set_cmd_completer (c
, filename_completer
);
21000 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
21001 &dwarf2_locexpr_funcs
);
21002 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
21003 &dwarf2_loclist_funcs
);
21005 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
21006 &dwarf2_block_frame_base_locexpr_funcs
);
21007 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
21008 &dwarf2_block_frame_base_loclist_funcs
);