1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2012 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "exceptions.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
72 #include "gdb_string.h"
73 #include "gdb_assert.h"
74 #include <sys/types.h>
76 typedef struct symbol
*symbolp
;
79 /* When non-zero, print basic high level tracing messages.
80 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
81 static int dwarf2_read_debug
= 0;
83 /* When non-zero, dump DIEs after they are read in. */
84 static unsigned int dwarf2_die_debug
= 0;
86 /* When non-zero, cross-check physname against demangler. */
87 static int check_physname
= 0;
89 /* When non-zero, do not reject deprecated .gdb_index sections. */
90 static int use_deprecated_index_sections
= 0;
92 /* When set, the file that we're processing is known to have debugging
93 info for C++ namespaces. GCC 3.3.x did not produce this information,
94 but later versions do. */
96 static int processing_has_namespace_info
;
98 static const struct objfile_data
*dwarf2_objfile_data_key
;
100 struct dwarf2_section_info
105 /* True if we have tried to read this section. */
109 typedef struct dwarf2_section_info dwarf2_section_info_def
;
110 DEF_VEC_O (dwarf2_section_info_def
);
112 /* All offsets in the index are of this type. It must be
113 architecture-independent. */
114 typedef uint32_t offset_type
;
116 DEF_VEC_I (offset_type
);
118 /* Ensure only legit values are used. */
119 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
121 gdb_assert ((unsigned int) (value) <= 1); \
122 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
125 /* Ensure only legit values are used. */
126 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
128 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
129 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
130 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
133 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
134 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
136 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
137 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
140 /* A description of the mapped index. The file format is described in
141 a comment by the code that writes the index. */
144 /* Index data format version. */
147 /* The total length of the buffer. */
150 /* A pointer to the address table data. */
151 const gdb_byte
*address_table
;
153 /* Size of the address table data in bytes. */
154 offset_type address_table_size
;
156 /* The symbol table, implemented as a hash table. */
157 const offset_type
*symbol_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type symbol_table_slots
;
162 /* A pointer to the constant pool. */
163 const char *constant_pool
;
166 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
167 DEF_VEC_P (dwarf2_per_cu_ptr
);
169 /* Collection of data recorded per objfile.
170 This hangs off of dwarf2_objfile_data_key. */
172 struct dwarf2_per_objfile
174 struct dwarf2_section_info info
;
175 struct dwarf2_section_info abbrev
;
176 struct dwarf2_section_info line
;
177 struct dwarf2_section_info loc
;
178 struct dwarf2_section_info macinfo
;
179 struct dwarf2_section_info macro
;
180 struct dwarf2_section_info str
;
181 struct dwarf2_section_info ranges
;
182 struct dwarf2_section_info addr
;
183 struct dwarf2_section_info frame
;
184 struct dwarf2_section_info eh_frame
;
185 struct dwarf2_section_info gdb_index
;
187 VEC (dwarf2_section_info_def
) *types
;
190 struct objfile
*objfile
;
192 /* Table of all the compilation units. This is used to locate
193 the target compilation unit of a particular reference. */
194 struct dwarf2_per_cu_data
**all_comp_units
;
196 /* The number of compilation units in ALL_COMP_UNITS. */
199 /* The number of .debug_types-related CUs. */
202 /* The .debug_types-related CUs (TUs). */
203 struct signatured_type
**all_type_units
;
205 /* The number of entries in all_type_unit_groups. */
206 int n_type_unit_groups
;
208 /* Table of type unit groups.
209 This exists to make it easy to iterate over all CUs and TU groups. */
210 struct type_unit_group
**all_type_unit_groups
;
212 /* Table of struct type_unit_group objects.
213 The hash key is the DW_AT_stmt_list value. */
214 htab_t type_unit_groups
;
216 /* A table mapping .debug_types signatures to its signatured_type entry.
217 This is NULL if the .debug_types section hasn't been read in yet. */
218 htab_t signatured_types
;
220 /* Type unit statistics, to see how well the scaling improvements
224 int nr_uniq_abbrev_tables
;
226 int nr_symtab_sharers
;
227 int nr_stmt_less_type_units
;
230 /* A chain of compilation units that are currently read in, so that
231 they can be freed later. */
232 struct dwarf2_per_cu_data
*read_in_chain
;
234 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
235 This is NULL if the table hasn't been allocated yet. */
238 /* Non-zero if we've check for whether there is a DWP file. */
241 /* The DWP file if there is one, or NULL. */
242 struct dwp_file
*dwp_file
;
244 /* The shared '.dwz' file, if one exists. This is used when the
245 original data was compressed using 'dwz -m'. */
246 struct dwz_file
*dwz_file
;
248 /* A flag indicating wether this objfile has a section loaded at a
250 int has_section_at_zero
;
252 /* True if we are using the mapped index,
253 or we are faking it for OBJF_READNOW's sake. */
254 unsigned char using_index
;
256 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
257 struct mapped_index
*index_table
;
259 /* When using index_table, this keeps track of all quick_file_names entries.
260 TUs typically share line table entries with a CU, so we maintain a
261 separate table of all line table entries to support the sharing.
262 Note that while there can be way more TUs than CUs, we've already
263 sorted all the TUs into "type unit groups", grouped by their
264 DW_AT_stmt_list value. Therefore the only sharing done here is with a
265 CU and its associated TU group if there is one. */
266 htab_t quick_file_names_table
;
268 /* Set during partial symbol reading, to prevent queueing of full
270 int reading_partial_symbols
;
272 /* Table mapping type DIEs to their struct type *.
273 This is NULL if not allocated yet.
274 The mapping is done via (CU/TU signature + DIE offset) -> type. */
275 htab_t die_type_hash
;
277 /* The CUs we recently read. */
278 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
281 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
283 /* Default names of the debugging sections. */
285 /* Note that if the debugging section has been compressed, it might
286 have a name like .zdebug_info. */
288 static const struct dwarf2_debug_sections dwarf2_elf_names
=
290 { ".debug_info", ".zdebug_info" },
291 { ".debug_abbrev", ".zdebug_abbrev" },
292 { ".debug_line", ".zdebug_line" },
293 { ".debug_loc", ".zdebug_loc" },
294 { ".debug_macinfo", ".zdebug_macinfo" },
295 { ".debug_macro", ".zdebug_macro" },
296 { ".debug_str", ".zdebug_str" },
297 { ".debug_ranges", ".zdebug_ranges" },
298 { ".debug_types", ".zdebug_types" },
299 { ".debug_addr", ".zdebug_addr" },
300 { ".debug_frame", ".zdebug_frame" },
301 { ".eh_frame", NULL
},
302 { ".gdb_index", ".zgdb_index" },
306 /* List of DWO/DWP sections. */
308 static const struct dwop_section_names
310 struct dwarf2_section_names abbrev_dwo
;
311 struct dwarf2_section_names info_dwo
;
312 struct dwarf2_section_names line_dwo
;
313 struct dwarf2_section_names loc_dwo
;
314 struct dwarf2_section_names macinfo_dwo
;
315 struct dwarf2_section_names macro_dwo
;
316 struct dwarf2_section_names str_dwo
;
317 struct dwarf2_section_names str_offsets_dwo
;
318 struct dwarf2_section_names types_dwo
;
319 struct dwarf2_section_names cu_index
;
320 struct dwarf2_section_names tu_index
;
324 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
325 { ".debug_info.dwo", ".zdebug_info.dwo" },
326 { ".debug_line.dwo", ".zdebug_line.dwo" },
327 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
328 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
329 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
330 { ".debug_str.dwo", ".zdebug_str.dwo" },
331 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
332 { ".debug_types.dwo", ".zdebug_types.dwo" },
333 { ".debug_cu_index", ".zdebug_cu_index" },
334 { ".debug_tu_index", ".zdebug_tu_index" },
337 /* local data types */
339 /* The data in a compilation unit header, after target2host
340 translation, looks like this. */
341 struct comp_unit_head
345 unsigned char addr_size
;
346 unsigned char signed_addr_p
;
347 sect_offset abbrev_offset
;
349 /* Size of file offsets; either 4 or 8. */
350 unsigned int offset_size
;
352 /* Size of the length field; either 4 or 12. */
353 unsigned int initial_length_size
;
355 /* Offset to the first byte of this compilation unit header in the
356 .debug_info section, for resolving relative reference dies. */
359 /* Offset to first die in this cu from the start of the cu.
360 This will be the first byte following the compilation unit header. */
361 cu_offset first_die_offset
;
364 /* Type used for delaying computation of method physnames.
365 See comments for compute_delayed_physnames. */
366 struct delayed_method_info
368 /* The type to which the method is attached, i.e., its parent class. */
371 /* The index of the method in the type's function fieldlists. */
374 /* The index of the method in the fieldlist. */
377 /* The name of the DIE. */
380 /* The DIE associated with this method. */
381 struct die_info
*die
;
384 typedef struct delayed_method_info delayed_method_info
;
385 DEF_VEC_O (delayed_method_info
);
387 /* Internal state when decoding a particular compilation unit. */
390 /* The objfile containing this compilation unit. */
391 struct objfile
*objfile
;
393 /* The header of the compilation unit. */
394 struct comp_unit_head header
;
396 /* Base address of this compilation unit. */
397 CORE_ADDR base_address
;
399 /* Non-zero if base_address has been set. */
402 /* The language we are debugging. */
403 enum language language
;
404 const struct language_defn
*language_defn
;
406 const char *producer
;
408 /* The generic symbol table building routines have separate lists for
409 file scope symbols and all all other scopes (local scopes). So
410 we need to select the right one to pass to add_symbol_to_list().
411 We do it by keeping a pointer to the correct list in list_in_scope.
413 FIXME: The original dwarf code just treated the file scope as the
414 first local scope, and all other local scopes as nested local
415 scopes, and worked fine. Check to see if we really need to
416 distinguish these in buildsym.c. */
417 struct pending
**list_in_scope
;
419 /* The abbrev table for this CU.
420 Normally this points to the abbrev table in the objfile.
421 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
422 struct abbrev_table
*abbrev_table
;
424 /* Hash table holding all the loaded partial DIEs
425 with partial_die->offset.SECT_OFF as hash. */
428 /* Storage for things with the same lifetime as this read-in compilation
429 unit, including partial DIEs. */
430 struct obstack comp_unit_obstack
;
432 /* When multiple dwarf2_cu structures are living in memory, this field
433 chains them all together, so that they can be released efficiently.
434 We will probably also want a generation counter so that most-recently-used
435 compilation units are cached... */
436 struct dwarf2_per_cu_data
*read_in_chain
;
438 /* Backchain to our per_cu entry if the tree has been built. */
439 struct dwarf2_per_cu_data
*per_cu
;
441 /* How many compilation units ago was this CU last referenced? */
444 /* A hash table of DIE cu_offset for following references with
445 die_info->offset.sect_off as hash. */
448 /* Full DIEs if read in. */
449 struct die_info
*dies
;
451 /* A set of pointers to dwarf2_per_cu_data objects for compilation
452 units referenced by this one. Only set during full symbol processing;
453 partial symbol tables do not have dependencies. */
456 /* Header data from the line table, during full symbol processing. */
457 struct line_header
*line_header
;
459 /* A list of methods which need to have physnames computed
460 after all type information has been read. */
461 VEC (delayed_method_info
) *method_list
;
463 /* To be copied to symtab->call_site_htab. */
464 htab_t call_site_htab
;
466 /* Non-NULL if this CU came from a DWO file.
467 There is an invariant here that is important to remember:
468 Except for attributes copied from the top level DIE in the "main"
469 (or "stub") file in preparation for reading the DWO file
470 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
471 Either there isn't a DWO file (in which case this is NULL and the point
472 is moot), or there is and either we're not going to read it (in which
473 case this is NULL) or there is and we are reading it (in which case this
475 struct dwo_unit
*dwo_unit
;
477 /* The DW_AT_addr_base attribute if present, zero otherwise
478 (zero is a valid value though).
479 Note this value comes from the stub CU/TU's DIE. */
482 /* The DW_AT_ranges_base attribute if present, zero otherwise
483 (zero is a valid value though).
484 Note this value comes from the stub CU/TU's DIE.
485 Also note that the value is zero in the non-DWO case so this value can
486 be used without needing to know whether DWO files are in use or not.
487 N.B. This does not apply to DW_AT_ranges appearing in
488 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
489 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
490 DW_AT_ranges_base *would* have to be applied, and we'd have to care
491 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
492 ULONGEST ranges_base
;
494 /* Mark used when releasing cached dies. */
495 unsigned int mark
: 1;
497 /* This CU references .debug_loc. See the symtab->locations_valid field.
498 This test is imperfect as there may exist optimized debug code not using
499 any location list and still facing inlining issues if handled as
500 unoptimized code. For a future better test see GCC PR other/32998. */
501 unsigned int has_loclist
: 1;
503 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
504 if all the producer_is_* fields are valid. This information is cached
505 because profiling CU expansion showed excessive time spent in
506 producer_is_gxx_lt_4_6. */
507 unsigned int checked_producer
: 1;
508 unsigned int producer_is_gxx_lt_4_6
: 1;
509 unsigned int producer_is_gcc_lt_4_3
: 1;
510 unsigned int producer_is_icc
: 1;
513 /* Persistent data held for a compilation unit, even when not
514 processing it. We put a pointer to this structure in the
515 read_symtab_private field of the psymtab. */
517 struct dwarf2_per_cu_data
519 /* The start offset and length of this compilation unit.
520 NOTE: Unlike comp_unit_head.length, this length includes
522 If the DIE refers to a DWO file, this is always of the original die,
527 /* Flag indicating this compilation unit will be read in before
528 any of the current compilation units are processed. */
529 unsigned int queued
: 1;
531 /* This flag will be set when reading partial DIEs if we need to load
532 absolutely all DIEs for this compilation unit, instead of just the ones
533 we think are interesting. It gets set if we look for a DIE in the
534 hash table and don't find it. */
535 unsigned int load_all_dies
: 1;
537 /* Non-zero if this CU is from .debug_types. */
538 unsigned int is_debug_types
: 1;
540 /* Non-zero if this CU is from the .dwz file. */
541 unsigned int is_dwz
: 1;
543 /* The section this CU/TU lives in.
544 If the DIE refers to a DWO file, this is always the original die,
546 struct dwarf2_section_info
*info_or_types_section
;
548 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
549 of the CU cache it gets reset to NULL again. */
550 struct dwarf2_cu
*cu
;
552 /* The corresponding objfile.
553 Normally we can get the objfile from dwarf2_per_objfile.
554 However we can enter this file with just a "per_cu" handle. */
555 struct objfile
*objfile
;
557 /* When using partial symbol tables, the 'psymtab' field is active.
558 Otherwise the 'quick' field is active. */
561 /* The partial symbol table associated with this compilation unit,
562 or NULL for unread partial units. */
563 struct partial_symtab
*psymtab
;
565 /* Data needed by the "quick" functions. */
566 struct dwarf2_per_cu_quick_data
*quick
;
571 /* The CUs we import using DW_TAG_imported_unit. This is filled in
572 while reading psymtabs, used to compute the psymtab dependencies,
573 and then cleared. Then it is filled in again while reading full
574 symbols, and only deleted when the objfile is destroyed. */
575 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
577 /* Type units are grouped by their DW_AT_stmt_list entry so that they
578 can share them. If this is a TU, this points to the containing
580 struct type_unit_group
*type_unit_group
;
584 /* Entry in the signatured_types hash table. */
586 struct signatured_type
588 /* The "per_cu" object of this type.
589 N.B.: This is the first member so that it's easy to convert pointers
591 struct dwarf2_per_cu_data per_cu
;
593 /* The type's signature. */
596 /* Offset in the TU of the type's DIE, as read from the TU header.
597 If the definition lives in a DWO file, this value is unusable. */
598 cu_offset type_offset_in_tu
;
600 /* Offset in the section of the type's DIE.
601 If the definition lives in a DWO file, this is the offset in the
602 .debug_types.dwo section.
603 The value is zero until the actual value is known.
604 Zero is otherwise not a valid section offset. */
605 sect_offset type_offset_in_section
;
608 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
609 This includes type_unit_group and quick_file_names. */
611 struct stmt_list_hash
613 /* The DWO unit this table is from or NULL if there is none. */
614 struct dwo_unit
*dwo_unit
;
616 /* Offset in .debug_line or .debug_line.dwo. */
617 sect_offset line_offset
;
620 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
621 an object of this type. */
623 struct type_unit_group
625 /* dwarf2read.c's main "handle" on the symtab.
626 To simplify things we create an artificial CU that "includes" all the
627 type units using this stmt_list so that the rest of the code still has
628 a "per_cu" handle on the symtab.
629 This PER_CU is recognized by having no section. */
630 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
631 struct dwarf2_per_cu_data per_cu
;
635 /* The TUs that share this DW_AT_stmt_list entry.
636 This is added to while parsing type units to build partial symtabs,
637 and is deleted afterwards and not used again. */
638 VEC (dwarf2_per_cu_ptr
) *tus
;
640 /* When reading the line table in "quick" functions, we need a real TU.
641 Any will do, we know they all share the same DW_AT_stmt_list entry.
642 For simplicity's sake, we pick the first one. */
643 struct dwarf2_per_cu_data
*first_tu
;
646 /* The primary symtab.
647 Type units in a group needn't all be defined in the same source file,
648 so we create an essentially anonymous symtab as the primary symtab. */
649 struct symtab
*primary_symtab
;
651 /* The data used to construct the hash key. */
652 struct stmt_list_hash hash
;
654 /* The number of symtabs from the line header.
655 The value here must match line_header.num_file_names. */
656 unsigned int num_symtabs
;
658 /* The symbol tables for this TU (obtained from the files listed in
660 WARNING: The order of entries here must match the order of entries
661 in the line header. After the first TU using this type_unit_group, the
662 line header for the subsequent TUs is recreated from this. This is done
663 because we need to use the same symtabs for each TU using the same
664 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
665 there's no guarantee the line header doesn't have duplicate entries. */
666 struct symtab
**symtabs
;
669 /* These sections are what may appear in a DWO file. */
673 struct dwarf2_section_info abbrev
;
674 struct dwarf2_section_info line
;
675 struct dwarf2_section_info loc
;
676 struct dwarf2_section_info macinfo
;
677 struct dwarf2_section_info macro
;
678 struct dwarf2_section_info str
;
679 struct dwarf2_section_info str_offsets
;
680 /* In the case of a virtual DWO file, these two are unused. */
681 struct dwarf2_section_info info
;
682 VEC (dwarf2_section_info_def
) *types
;
685 /* Common bits of DWO CUs/TUs. */
689 /* Backlink to the containing struct dwo_file. */
690 struct dwo_file
*dwo_file
;
692 /* The "id" that distinguishes this CU/TU.
693 .debug_info calls this "dwo_id", .debug_types calls this "signature".
694 Since signatures came first, we stick with it for consistency. */
697 /* The section this CU/TU lives in, in the DWO file. */
698 struct dwarf2_section_info
*info_or_types_section
;
700 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
704 /* For types, offset in the type's DIE of the type defined by this TU. */
705 cu_offset type_offset_in_tu
;
708 /* Data for one DWO file.
709 This includes virtual DWO files that have been packaged into a
714 /* The DW_AT_GNU_dwo_name attribute. This is the hash key.
715 For virtual DWO files the name is constructed from the section offsets
716 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
717 from related CU+TUs. */
720 /* The bfd, when the file is open. Otherwise this is NULL.
721 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
724 /* Section info for this file. */
725 struct dwo_sections sections
;
727 /* Table of CUs in the file.
728 Each element is a struct dwo_unit. */
731 /* Table of TUs in the file.
732 Each element is a struct dwo_unit. */
736 /* These sections are what may appear in a DWP file. */
740 struct dwarf2_section_info str
;
741 struct dwarf2_section_info cu_index
;
742 struct dwarf2_section_info tu_index
;
743 /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced
744 by section number. We don't need to record them here. */
747 /* These sections are what may appear in a virtual DWO file. */
749 struct virtual_dwo_sections
751 struct dwarf2_section_info abbrev
;
752 struct dwarf2_section_info line
;
753 struct dwarf2_section_info loc
;
754 struct dwarf2_section_info macinfo
;
755 struct dwarf2_section_info macro
;
756 struct dwarf2_section_info str_offsets
;
757 /* Each DWP hash table entry records one CU or one TU.
758 That is recorded here, and copied to dwo_unit.info_or_types_section. */
759 struct dwarf2_section_info info_or_types
;
762 /* Contents of DWP hash tables. */
764 struct dwp_hash_table
766 uint32_t nr_units
, nr_slots
;
767 const gdb_byte
*hash_table
, *unit_table
, *section_pool
;
770 /* Data for one DWP file. */
774 /* Name of the file. */
777 /* The bfd, when the file is open. Otherwise this is NULL. */
780 /* Section info for this file. */
781 struct dwp_sections sections
;
783 /* Table of CUs in the file. */
784 const struct dwp_hash_table
*cus
;
786 /* Table of TUs in the file. */
787 const struct dwp_hash_table
*tus
;
789 /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
792 /* Table to map ELF section numbers to their sections. */
793 unsigned int num_sections
;
794 asection
**elf_sections
;
797 /* This represents a '.dwz' file. */
801 /* A dwz file can only contain a few sections. */
802 struct dwarf2_section_info abbrev
;
803 struct dwarf2_section_info info
;
804 struct dwarf2_section_info str
;
805 struct dwarf2_section_info line
;
806 struct dwarf2_section_info macro
;
807 struct dwarf2_section_info gdb_index
;
813 /* Struct used to pass misc. parameters to read_die_and_children, et
814 al. which are used for both .debug_info and .debug_types dies.
815 All parameters here are unchanging for the life of the call. This
816 struct exists to abstract away the constant parameters of die reading. */
818 struct die_reader_specs
820 /* die_section->asection->owner. */
823 /* The CU of the DIE we are parsing. */
824 struct dwarf2_cu
*cu
;
826 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
827 struct dwo_file
*dwo_file
;
829 /* The section the die comes from.
830 This is either .debug_info or .debug_types, or the .dwo variants. */
831 struct dwarf2_section_info
*die_section
;
833 /* die_section->buffer. */
836 /* The end of the buffer. */
837 const gdb_byte
*buffer_end
;
840 /* Type of function passed to init_cutu_and_read_dies, et.al. */
841 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
843 struct die_info
*comp_unit_die
,
847 /* The line number information for a compilation unit (found in the
848 .debug_line section) begins with a "statement program header",
849 which contains the following information. */
852 unsigned int total_length
;
853 unsigned short version
;
854 unsigned int header_length
;
855 unsigned char minimum_instruction_length
;
856 unsigned char maximum_ops_per_instruction
;
857 unsigned char default_is_stmt
;
859 unsigned char line_range
;
860 unsigned char opcode_base
;
862 /* standard_opcode_lengths[i] is the number of operands for the
863 standard opcode whose value is i. This means that
864 standard_opcode_lengths[0] is unused, and the last meaningful
865 element is standard_opcode_lengths[opcode_base - 1]. */
866 unsigned char *standard_opcode_lengths
;
868 /* The include_directories table. NOTE! These strings are not
869 allocated with xmalloc; instead, they are pointers into
870 debug_line_buffer. If you try to free them, `free' will get
872 unsigned int num_include_dirs
, include_dirs_size
;
875 /* The file_names table. NOTE! These strings are not allocated
876 with xmalloc; instead, they are pointers into debug_line_buffer.
877 Don't try to free them directly. */
878 unsigned int num_file_names
, file_names_size
;
882 unsigned int dir_index
;
883 unsigned int mod_time
;
885 int included_p
; /* Non-zero if referenced by the Line Number Program. */
886 struct symtab
*symtab
; /* The associated symbol table, if any. */
889 /* The start and end of the statement program following this
890 header. These point into dwarf2_per_objfile->line_buffer. */
891 gdb_byte
*statement_program_start
, *statement_program_end
;
894 /* When we construct a partial symbol table entry we only
895 need this much information. */
896 struct partial_die_info
898 /* Offset of this DIE. */
901 /* DWARF-2 tag for this DIE. */
902 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
904 /* Assorted flags describing the data found in this DIE. */
905 unsigned int has_children
: 1;
906 unsigned int is_external
: 1;
907 unsigned int is_declaration
: 1;
908 unsigned int has_type
: 1;
909 unsigned int has_specification
: 1;
910 unsigned int has_pc_info
: 1;
911 unsigned int may_be_inlined
: 1;
913 /* Flag set if the SCOPE field of this structure has been
915 unsigned int scope_set
: 1;
917 /* Flag set if the DIE has a byte_size attribute. */
918 unsigned int has_byte_size
: 1;
920 /* Flag set if any of the DIE's children are template arguments. */
921 unsigned int has_template_arguments
: 1;
923 /* Flag set if fixup_partial_die has been called on this die. */
924 unsigned int fixup_called
: 1;
926 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
927 unsigned int is_dwz
: 1;
929 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
930 unsigned int spec_is_dwz
: 1;
932 /* The name of this DIE. Normally the value of DW_AT_name, but
933 sometimes a default name for unnamed DIEs. */
936 /* The linkage name, if present. */
937 const char *linkage_name
;
939 /* The scope to prepend to our children. This is generally
940 allocated on the comp_unit_obstack, so will disappear
941 when this compilation unit leaves the cache. */
944 /* Some data associated with the partial DIE. The tag determines
945 which field is live. */
948 /* The location description associated with this DIE, if any. */
949 struct dwarf_block
*locdesc
;
950 /* The offset of an import, for DW_TAG_imported_unit. */
954 /* If HAS_PC_INFO, the PC range associated with this DIE. */
958 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
959 DW_AT_sibling, if any. */
960 /* NOTE: This member isn't strictly necessary, read_partial_die could
961 return DW_AT_sibling values to its caller load_partial_dies. */
964 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
965 DW_AT_specification (or DW_AT_abstract_origin or
967 sect_offset spec_offset
;
969 /* Pointers to this DIE's parent, first child, and next sibling,
971 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
974 /* This data structure holds the information of an abbrev. */
977 unsigned int number
; /* number identifying abbrev */
978 enum dwarf_tag tag
; /* dwarf tag */
979 unsigned short has_children
; /* boolean */
980 unsigned short num_attrs
; /* number of attributes */
981 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
982 struct abbrev_info
*next
; /* next in chain */
987 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
988 ENUM_BITFIELD(dwarf_form
) form
: 16;
991 /* Size of abbrev_table.abbrev_hash_table. */
992 #define ABBREV_HASH_SIZE 121
994 /* Top level data structure to contain an abbreviation table. */
998 /* Where the abbrev table came from.
999 This is used as a sanity check when the table is used. */
1002 /* Storage for the abbrev table. */
1003 struct obstack abbrev_obstack
;
1005 /* Hash table of abbrevs.
1006 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1007 It could be statically allocated, but the previous code didn't so we
1009 struct abbrev_info
**abbrevs
;
1012 /* Attributes have a name and a value. */
1015 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1016 ENUM_BITFIELD(dwarf_form
) form
: 15;
1018 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1019 field should be in u.str (existing only for DW_STRING) but it is kept
1020 here for better struct attribute alignment. */
1021 unsigned int string_is_canonical
: 1;
1026 struct dwarf_block
*blk
;
1030 struct signatured_type
*signatured_type
;
1035 /* This data structure holds a complete die structure. */
1038 /* DWARF-2 tag for this DIE. */
1039 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1041 /* Number of attributes */
1042 unsigned char num_attrs
;
1044 /* True if we're presently building the full type name for the
1045 type derived from this DIE. */
1046 unsigned char building_fullname
: 1;
1049 unsigned int abbrev
;
1051 /* Offset in .debug_info or .debug_types section. */
1054 /* The dies in a compilation unit form an n-ary tree. PARENT
1055 points to this die's parent; CHILD points to the first child of
1056 this node; and all the children of a given node are chained
1057 together via their SIBLING fields. */
1058 struct die_info
*child
; /* Its first child, if any. */
1059 struct die_info
*sibling
; /* Its next sibling, if any. */
1060 struct die_info
*parent
; /* Its parent, if any. */
1062 /* An array of attributes, with NUM_ATTRS elements. There may be
1063 zero, but it's not common and zero-sized arrays are not
1064 sufficiently portable C. */
1065 struct attribute attrs
[1];
1068 /* Get at parts of an attribute structure. */
1070 #define DW_STRING(attr) ((attr)->u.str)
1071 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1072 #define DW_UNSND(attr) ((attr)->u.unsnd)
1073 #define DW_BLOCK(attr) ((attr)->u.blk)
1074 #define DW_SND(attr) ((attr)->u.snd)
1075 #define DW_ADDR(attr) ((attr)->u.addr)
1076 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
1078 /* Blocks are a bunch of untyped bytes. */
1083 /* Valid only if SIZE is not zero. */
1087 #ifndef ATTR_ALLOC_CHUNK
1088 #define ATTR_ALLOC_CHUNK 4
1091 /* Allocate fields for structs, unions and enums in this size. */
1092 #ifndef DW_FIELD_ALLOC_CHUNK
1093 #define DW_FIELD_ALLOC_CHUNK 4
1096 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1097 but this would require a corresponding change in unpack_field_as_long
1099 static int bits_per_byte
= 8;
1101 /* The routines that read and process dies for a C struct or C++ class
1102 pass lists of data member fields and lists of member function fields
1103 in an instance of a field_info structure, as defined below. */
1106 /* List of data member and baseclasses fields. */
1109 struct nextfield
*next
;
1114 *fields
, *baseclasses
;
1116 /* Number of fields (including baseclasses). */
1119 /* Number of baseclasses. */
1122 /* Set if the accesibility of one of the fields is not public. */
1123 int non_public_fields
;
1125 /* Member function fields array, entries are allocated in the order they
1126 are encountered in the object file. */
1129 struct nextfnfield
*next
;
1130 struct fn_field fnfield
;
1134 /* Member function fieldlist array, contains name of possibly overloaded
1135 member function, number of overloaded member functions and a pointer
1136 to the head of the member function field chain. */
1141 struct nextfnfield
*head
;
1145 /* Number of entries in the fnfieldlists array. */
1148 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1149 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1150 struct typedef_field_list
1152 struct typedef_field field
;
1153 struct typedef_field_list
*next
;
1155 *typedef_field_list
;
1156 unsigned typedef_field_list_count
;
1159 /* One item on the queue of compilation units to read in full symbols
1161 struct dwarf2_queue_item
1163 struct dwarf2_per_cu_data
*per_cu
;
1164 enum language pretend_language
;
1165 struct dwarf2_queue_item
*next
;
1168 /* The current queue. */
1169 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1171 /* Loaded secondary compilation units are kept in memory until they
1172 have not been referenced for the processing of this many
1173 compilation units. Set this to zero to disable caching. Cache
1174 sizes of up to at least twenty will improve startup time for
1175 typical inter-CU-reference binaries, at an obvious memory cost. */
1176 static int dwarf2_max_cache_age
= 5;
1178 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1179 struct cmd_list_element
*c
, const char *value
)
1181 fprintf_filtered (file
, _("The upper bound on the age of cached "
1182 "dwarf2 compilation units is %s.\n"),
1187 /* Various complaints about symbol reading that don't abort the process. */
1190 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1192 complaint (&symfile_complaints
,
1193 _("statement list doesn't fit in .debug_line section"));
1197 dwarf2_debug_line_missing_file_complaint (void)
1199 complaint (&symfile_complaints
,
1200 _(".debug_line section has line data without a file"));
1204 dwarf2_debug_line_missing_end_sequence_complaint (void)
1206 complaint (&symfile_complaints
,
1207 _(".debug_line section has line "
1208 "program sequence without an end"));
1212 dwarf2_complex_location_expr_complaint (void)
1214 complaint (&symfile_complaints
, _("location expression too complex"));
1218 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1221 complaint (&symfile_complaints
,
1222 _("const value length mismatch for '%s', got %d, expected %d"),
1227 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1229 complaint (&symfile_complaints
,
1230 _("debug info runs off end of %s section"
1232 section
->asection
->name
,
1233 bfd_get_filename (section
->asection
->owner
));
1237 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1239 complaint (&symfile_complaints
,
1240 _("macro debug info contains a "
1241 "malformed macro definition:\n`%s'"),
1246 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1248 complaint (&symfile_complaints
,
1249 _("invalid attribute class or form for '%s' in '%s'"),
1253 /* local function prototypes */
1255 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1257 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1260 static void dwarf2_find_base_address (struct die_info
*die
,
1261 struct dwarf2_cu
*cu
);
1263 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1265 static void scan_partial_symbols (struct partial_die_info
*,
1266 CORE_ADDR
*, CORE_ADDR
*,
1267 int, struct dwarf2_cu
*);
1269 static void add_partial_symbol (struct partial_die_info
*,
1270 struct dwarf2_cu
*);
1272 static void add_partial_namespace (struct partial_die_info
*pdi
,
1273 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1274 int need_pc
, struct dwarf2_cu
*cu
);
1276 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1277 CORE_ADDR
*highpc
, int need_pc
,
1278 struct dwarf2_cu
*cu
);
1280 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1281 struct dwarf2_cu
*cu
);
1283 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1284 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1285 int need_pc
, struct dwarf2_cu
*cu
);
1287 static void dwarf2_psymtab_to_symtab (struct objfile
*,
1288 struct partial_symtab
*);
1290 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1292 static struct abbrev_info
*abbrev_table_lookup_abbrev
1293 (const struct abbrev_table
*, unsigned int);
1295 static struct abbrev_table
*abbrev_table_read_table
1296 (struct dwarf2_section_info
*, sect_offset
);
1298 static void abbrev_table_free (struct abbrev_table
*);
1300 static void abbrev_table_free_cleanup (void *);
1302 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1303 struct dwarf2_section_info
*);
1305 static void dwarf2_free_abbrev_table (void *);
1307 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1309 static struct partial_die_info
*load_partial_dies
1310 (const struct die_reader_specs
*, gdb_byte
*, int);
1312 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1313 struct partial_die_info
*,
1314 struct abbrev_info
*,
1318 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1319 struct dwarf2_cu
*);
1321 static void fixup_partial_die (struct partial_die_info
*,
1322 struct dwarf2_cu
*);
1324 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1325 struct attribute
*, struct attr_abbrev
*,
1328 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1330 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1332 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1334 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1336 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1338 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1341 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1343 static LONGEST read_checked_initial_length_and_offset
1344 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1345 unsigned int *, unsigned int *);
1347 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1350 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1352 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1355 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1357 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1359 static char *read_indirect_string (bfd
*, gdb_byte
*,
1360 const struct comp_unit_head
*,
1363 static char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1365 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1367 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1369 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1372 static char *read_str_index (const struct die_reader_specs
*reader
,
1373 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1375 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1377 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1378 struct dwarf2_cu
*);
1380 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1383 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1384 struct dwarf2_cu
*cu
);
1386 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1388 static struct die_info
*die_specification (struct die_info
*die
,
1389 struct dwarf2_cu
**);
1391 static void free_line_header (struct line_header
*lh
);
1393 static void add_file_name (struct line_header
*, char *, unsigned int,
1394 unsigned int, unsigned int);
1396 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1397 struct dwarf2_cu
*cu
);
1399 static void dwarf_decode_lines (struct line_header
*, const char *,
1400 struct dwarf2_cu
*, struct partial_symtab
*,
1403 static void dwarf2_start_subfile (char *, const char *, const char *);
1405 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1406 char *, char *, CORE_ADDR
);
1408 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1409 struct dwarf2_cu
*);
1411 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1412 struct dwarf2_cu
*, struct symbol
*);
1414 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1415 struct dwarf2_cu
*);
1417 static void dwarf2_const_value_attr (struct attribute
*attr
,
1420 struct obstack
*obstack
,
1421 struct dwarf2_cu
*cu
, LONGEST
*value
,
1423 struct dwarf2_locexpr_baton
**baton
);
1425 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1427 static int need_gnat_info (struct dwarf2_cu
*);
1429 static struct type
*die_descriptive_type (struct die_info
*,
1430 struct dwarf2_cu
*);
1432 static void set_descriptive_type (struct type
*, struct die_info
*,
1433 struct dwarf2_cu
*);
1435 static struct type
*die_containing_type (struct die_info
*,
1436 struct dwarf2_cu
*);
1438 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1439 struct dwarf2_cu
*);
1441 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1443 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1445 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1447 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1448 const char *suffix
, int physname
,
1449 struct dwarf2_cu
*cu
);
1451 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1453 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1455 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1457 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1459 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1461 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1462 struct dwarf2_cu
*, struct partial_symtab
*);
1464 static int dwarf2_get_pc_bounds (struct die_info
*,
1465 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1466 struct partial_symtab
*);
1468 static void get_scope_pc_bounds (struct die_info
*,
1469 CORE_ADDR
*, CORE_ADDR
*,
1470 struct dwarf2_cu
*);
1472 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1473 CORE_ADDR
, struct dwarf2_cu
*);
1475 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1476 struct dwarf2_cu
*);
1478 static void dwarf2_attach_fields_to_type (struct field_info
*,
1479 struct type
*, struct dwarf2_cu
*);
1481 static void dwarf2_add_member_fn (struct field_info
*,
1482 struct die_info
*, struct type
*,
1483 struct dwarf2_cu
*);
1485 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1487 struct dwarf2_cu
*);
1489 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1491 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1493 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1495 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1497 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1499 static struct type
*read_module_type (struct die_info
*die
,
1500 struct dwarf2_cu
*cu
);
1502 static const char *namespace_name (struct die_info
*die
,
1503 int *is_anonymous
, struct dwarf2_cu
*);
1505 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1507 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1509 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1510 struct dwarf2_cu
*);
1512 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1514 gdb_byte
**new_info_ptr
,
1515 struct die_info
*parent
);
1517 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1519 gdb_byte
**new_info_ptr
,
1520 struct die_info
*parent
);
1522 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1523 struct die_info
**, gdb_byte
*, int *, int);
1525 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1526 struct die_info
**, gdb_byte
*, int *);
1528 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1530 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1533 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1535 static const char *dwarf2_full_name (char *name
,
1536 struct die_info
*die
,
1537 struct dwarf2_cu
*cu
);
1539 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1540 struct dwarf2_cu
**);
1542 static const char *dwarf_tag_name (unsigned int);
1544 static const char *dwarf_attr_name (unsigned int);
1546 static const char *dwarf_form_name (unsigned int);
1548 static char *dwarf_bool_name (unsigned int);
1550 static const char *dwarf_type_encoding_name (unsigned int);
1552 static struct die_info
*sibling_die (struct die_info
*);
1554 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1556 static void dump_die_for_error (struct die_info
*);
1558 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1561 /*static*/ void dump_die (struct die_info
*, int max_level
);
1563 static void store_in_ref_table (struct die_info
*,
1564 struct dwarf2_cu
*);
1566 static int is_ref_attr (struct attribute
*);
1568 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1570 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1572 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1574 struct dwarf2_cu
**);
1576 static struct die_info
*follow_die_ref (struct die_info
*,
1578 struct dwarf2_cu
**);
1580 static struct die_info
*follow_die_sig (struct die_info
*,
1582 struct dwarf2_cu
**);
1584 static struct signatured_type
*lookup_signatured_type_at_offset
1585 (struct objfile
*objfile
,
1586 struct dwarf2_section_info
*section
, sect_offset offset
);
1588 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1590 static void read_signatured_type (struct signatured_type
*);
1592 static struct type_unit_group
*get_type_unit_group
1593 (struct dwarf2_cu
*, struct attribute
*);
1595 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1597 /* memory allocation interface */
1599 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1601 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1603 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1606 static int attr_form_is_block (struct attribute
*);
1608 static int attr_form_is_section_offset (struct attribute
*);
1610 static int attr_form_is_constant (struct attribute
*);
1612 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1613 struct dwarf2_loclist_baton
*baton
,
1614 struct attribute
*attr
);
1616 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1618 struct dwarf2_cu
*cu
);
1620 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1622 struct abbrev_info
*abbrev
);
1624 static void free_stack_comp_unit (void *);
1626 static hashval_t
partial_die_hash (const void *item
);
1628 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1630 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1631 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1633 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1634 struct dwarf2_per_cu_data
*per_cu
);
1636 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1637 struct die_info
*comp_unit_die
,
1638 enum language pretend_language
);
1640 static void free_heap_comp_unit (void *);
1642 static void free_cached_comp_units (void *);
1644 static void age_cached_comp_units (void);
1646 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1648 static struct type
*set_die_type (struct die_info
*, struct type
*,
1649 struct dwarf2_cu
*);
1651 static void create_all_comp_units (struct objfile
*);
1653 static int create_all_type_units (struct objfile
*);
1655 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1658 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1661 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1664 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1665 struct dwarf2_per_cu_data
*);
1667 static void dwarf2_mark (struct dwarf2_cu
*);
1669 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1671 static struct type
*get_die_type_at_offset (sect_offset
,
1672 struct dwarf2_per_cu_data
*per_cu
);
1674 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1676 static void dwarf2_release_queue (void *dummy
);
1678 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1679 enum language pretend_language
);
1681 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1682 struct dwarf2_per_cu_data
*per_cu
,
1683 enum language pretend_language
);
1685 static void process_queue (void);
1687 static void find_file_and_directory (struct die_info
*die
,
1688 struct dwarf2_cu
*cu
,
1689 char **name
, char **comp_dir
);
1691 static char *file_full_name (int file
, struct line_header
*lh
,
1692 const char *comp_dir
);
1694 static gdb_byte
*read_and_check_comp_unit_head
1695 (struct comp_unit_head
*header
,
1696 struct dwarf2_section_info
*section
,
1697 struct dwarf2_section_info
*abbrev_section
, gdb_byte
*info_ptr
,
1698 int is_debug_types_section
);
1700 static void init_cutu_and_read_dies
1701 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1702 int use_existing_cu
, int keep
,
1703 die_reader_func_ftype
*die_reader_func
, void *data
);
1705 static void init_cutu_and_read_dies_simple
1706 (struct dwarf2_per_cu_data
*this_cu
,
1707 die_reader_func_ftype
*die_reader_func
, void *data
);
1709 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1711 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1713 static struct dwo_unit
*lookup_dwo_comp_unit
1714 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1716 static struct dwo_unit
*lookup_dwo_type_unit
1717 (struct signatured_type
*, const char *, const char *);
1719 static void free_dwo_file_cleanup (void *);
1721 static void process_cu_includes (void);
1723 static void check_producer (struct dwarf2_cu
*cu
);
1727 /* Convert VALUE between big- and little-endian. */
1729 byte_swap (offset_type value
)
1733 result
= (value
& 0xff) << 24;
1734 result
|= (value
& 0xff00) << 8;
1735 result
|= (value
& 0xff0000) >> 8;
1736 result
|= (value
& 0xff000000) >> 24;
1740 #define MAYBE_SWAP(V) byte_swap (V)
1743 #define MAYBE_SWAP(V) (V)
1744 #endif /* WORDS_BIGENDIAN */
1746 /* The suffix for an index file. */
1747 #define INDEX_SUFFIX ".gdb-index"
1749 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1750 struct dwarf2_cu
*cu
);
1752 /* Try to locate the sections we need for DWARF 2 debugging
1753 information and return true if we have enough to do something.
1754 NAMES points to the dwarf2 section names, or is NULL if the standard
1755 ELF names are used. */
1758 dwarf2_has_info (struct objfile
*objfile
,
1759 const struct dwarf2_debug_sections
*names
)
1761 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1762 if (!dwarf2_per_objfile
)
1764 /* Initialize per-objfile state. */
1765 struct dwarf2_per_objfile
*data
1766 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1768 memset (data
, 0, sizeof (*data
));
1769 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1770 dwarf2_per_objfile
= data
;
1772 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1774 dwarf2_per_objfile
->objfile
= objfile
;
1776 return (dwarf2_per_objfile
->info
.asection
!= NULL
1777 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1780 /* When loading sections, we look either for uncompressed section or for
1781 compressed section names. */
1784 section_is_p (const char *section_name
,
1785 const struct dwarf2_section_names
*names
)
1787 if (names
->normal
!= NULL
1788 && strcmp (section_name
, names
->normal
) == 0)
1790 if (names
->compressed
!= NULL
1791 && strcmp (section_name
, names
->compressed
) == 0)
1796 /* This function is mapped across the sections and remembers the
1797 offset and size of each of the debugging sections we are interested
1801 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1803 const struct dwarf2_debug_sections
*names
;
1804 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1807 names
= &dwarf2_elf_names
;
1809 names
= (const struct dwarf2_debug_sections
*) vnames
;
1811 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1814 else if (section_is_p (sectp
->name
, &names
->info
))
1816 dwarf2_per_objfile
->info
.asection
= sectp
;
1817 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1819 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1821 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1822 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1824 else if (section_is_p (sectp
->name
, &names
->line
))
1826 dwarf2_per_objfile
->line
.asection
= sectp
;
1827 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1829 else if (section_is_p (sectp
->name
, &names
->loc
))
1831 dwarf2_per_objfile
->loc
.asection
= sectp
;
1832 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1834 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1836 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1837 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1839 else if (section_is_p (sectp
->name
, &names
->macro
))
1841 dwarf2_per_objfile
->macro
.asection
= sectp
;
1842 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1844 else if (section_is_p (sectp
->name
, &names
->str
))
1846 dwarf2_per_objfile
->str
.asection
= sectp
;
1847 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1849 else if (section_is_p (sectp
->name
, &names
->addr
))
1851 dwarf2_per_objfile
->addr
.asection
= sectp
;
1852 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1854 else if (section_is_p (sectp
->name
, &names
->frame
))
1856 dwarf2_per_objfile
->frame
.asection
= sectp
;
1857 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1859 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1861 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1862 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1864 else if (section_is_p (sectp
->name
, &names
->ranges
))
1866 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1867 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1869 else if (section_is_p (sectp
->name
, &names
->types
))
1871 struct dwarf2_section_info type_section
;
1873 memset (&type_section
, 0, sizeof (type_section
));
1874 type_section
.asection
= sectp
;
1875 type_section
.size
= bfd_get_section_size (sectp
);
1877 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1880 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1882 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1883 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1886 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1887 && bfd_section_vma (abfd
, sectp
) == 0)
1888 dwarf2_per_objfile
->has_section_at_zero
= 1;
1891 /* A helper function that decides whether a section is empty,
1895 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1897 return info
->asection
== NULL
|| info
->size
== 0;
1900 /* Read the contents of the section INFO.
1901 OBJFILE is the main object file, but not necessarily the file where
1902 the section comes from. E.g., for DWO files INFO->asection->owner
1903 is the bfd of the DWO file.
1904 If the section is compressed, uncompress it before returning. */
1907 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1909 asection
*sectp
= info
->asection
;
1911 gdb_byte
*buf
, *retbuf
;
1912 unsigned char header
[4];
1916 info
->buffer
= NULL
;
1919 if (dwarf2_section_empty_p (info
))
1922 abfd
= sectp
->owner
;
1924 /* If the section has relocations, we must read it ourselves.
1925 Otherwise we attach it to the BFD. */
1926 if ((sectp
->flags
& SEC_RELOC
) == 0)
1928 const gdb_byte
*bytes
= gdb_bfd_map_section (sectp
, &info
->size
);
1930 /* We have to cast away const here for historical reasons.
1931 Fixing dwarf2read to be const-correct would be quite nice. */
1932 info
->buffer
= (gdb_byte
*) bytes
;
1936 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1939 /* When debugging .o files, we may need to apply relocations; see
1940 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1941 We never compress sections in .o files, so we only need to
1942 try this when the section is not compressed. */
1943 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1946 info
->buffer
= retbuf
;
1950 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1951 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1952 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1953 bfd_get_filename (abfd
));
1956 /* A helper function that returns the size of a section in a safe way.
1957 If you are positive that the section has been read before using the
1958 size, then it is safe to refer to the dwarf2_section_info object's
1959 "size" field directly. In other cases, you must call this
1960 function, because for compressed sections the size field is not set
1961 correctly until the section has been read. */
1963 static bfd_size_type
1964 dwarf2_section_size (struct objfile
*objfile
,
1965 struct dwarf2_section_info
*info
)
1968 dwarf2_read_section (objfile
, info
);
1972 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1976 dwarf2_get_section_info (struct objfile
*objfile
,
1977 enum dwarf2_section_enum sect
,
1978 asection
**sectp
, gdb_byte
**bufp
,
1979 bfd_size_type
*sizep
)
1981 struct dwarf2_per_objfile
*data
1982 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1983 struct dwarf2_section_info
*info
;
1985 /* We may see an objfile without any DWARF, in which case we just
1996 case DWARF2_DEBUG_FRAME
:
1997 info
= &data
->frame
;
1999 case DWARF2_EH_FRAME
:
2000 info
= &data
->eh_frame
;
2003 gdb_assert_not_reached ("unexpected section");
2006 dwarf2_read_section (objfile
, info
);
2008 *sectp
= info
->asection
;
2009 *bufp
= info
->buffer
;
2010 *sizep
= info
->size
;
2013 /* A helper function to find the sections for a .dwz file. */
2016 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2018 struct dwz_file
*dwz_file
= arg
;
2020 /* Note that we only support the standard ELF names, because .dwz
2021 is ELF-only (at the time of writing). */
2022 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2024 dwz_file
->abbrev
.asection
= sectp
;
2025 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2027 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2029 dwz_file
->info
.asection
= sectp
;
2030 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2032 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2034 dwz_file
->str
.asection
= sectp
;
2035 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2037 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2039 dwz_file
->line
.asection
= sectp
;
2040 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2042 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2044 dwz_file
->macro
.asection
= sectp
;
2045 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2047 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2049 dwz_file
->gdb_index
.asection
= sectp
;
2050 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2054 /* Open the separate '.dwz' debug file, if needed. Error if the file
2057 static struct dwz_file
*
2058 dwarf2_get_dwz_file (void)
2060 bfd
*abfd
, *dwz_bfd
;
2063 struct cleanup
*cleanup
;
2064 const char *filename
;
2065 struct dwz_file
*result
;
2067 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2068 return dwarf2_per_objfile
->dwz_file
;
2070 abfd
= dwarf2_per_objfile
->objfile
->obfd
;
2071 section
= bfd_get_section_by_name (abfd
, ".gnu_debugaltlink");
2072 if (section
== NULL
)
2073 error (_("could not find '.gnu_debugaltlink' section"));
2074 if (!bfd_malloc_and_get_section (abfd
, section
, &data
))
2075 error (_("could not read '.gnu_debugaltlink' section: %s"),
2076 bfd_errmsg (bfd_get_error ()));
2077 cleanup
= make_cleanup (xfree
, data
);
2080 if (!IS_ABSOLUTE_PATH (filename
))
2082 char *abs
= gdb_realpath (dwarf2_per_objfile
->objfile
->name
);
2085 make_cleanup (xfree
, abs
);
2086 abs
= ldirname (abs
);
2087 make_cleanup (xfree
, abs
);
2089 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2090 make_cleanup (xfree
, rel
);
2094 /* The format is just a NUL-terminated file name, followed by the
2095 build-id. For now, though, we ignore the build-id. */
2096 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2097 if (dwz_bfd
== NULL
)
2098 error (_("could not read '%s': %s"), filename
,
2099 bfd_errmsg (bfd_get_error ()));
2101 if (!bfd_check_format (dwz_bfd
, bfd_object
))
2103 gdb_bfd_unref (dwz_bfd
);
2104 error (_("file '%s' was not usable: %s"), filename
,
2105 bfd_errmsg (bfd_get_error ()));
2108 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2110 result
->dwz_bfd
= dwz_bfd
;
2112 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2114 do_cleanups (cleanup
);
2116 dwarf2_per_objfile
->dwz_file
= result
;
2120 /* DWARF quick_symbols_functions support. */
2122 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2123 unique line tables, so we maintain a separate table of all .debug_line
2124 derived entries to support the sharing.
2125 All the quick functions need is the list of file names. We discard the
2126 line_header when we're done and don't need to record it here. */
2127 struct quick_file_names
2129 /* The data used to construct the hash key. */
2130 struct stmt_list_hash hash
;
2132 /* The number of entries in file_names, real_names. */
2133 unsigned int num_file_names
;
2135 /* The file names from the line table, after being run through
2137 const char **file_names
;
2139 /* The file names from the line table after being run through
2140 gdb_realpath. These are computed lazily. */
2141 const char **real_names
;
2144 /* When using the index (and thus not using psymtabs), each CU has an
2145 object of this type. This is used to hold information needed by
2146 the various "quick" methods. */
2147 struct dwarf2_per_cu_quick_data
2149 /* The file table. This can be NULL if there was no file table
2150 or it's currently not read in.
2151 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2152 struct quick_file_names
*file_names
;
2154 /* The corresponding symbol table. This is NULL if symbols for this
2155 CU have not yet been read. */
2156 struct symtab
*symtab
;
2158 /* A temporary mark bit used when iterating over all CUs in
2159 expand_symtabs_matching. */
2160 unsigned int mark
: 1;
2162 /* True if we've tried to read the file table and found there isn't one.
2163 There will be no point in trying to read it again next time. */
2164 unsigned int no_file_data
: 1;
2167 /* Utility hash function for a stmt_list_hash. */
2170 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2174 if (stmt_list_hash
->dwo_unit
!= NULL
)
2175 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2176 v
+= stmt_list_hash
->line_offset
.sect_off
;
2180 /* Utility equality function for a stmt_list_hash. */
2183 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2184 const struct stmt_list_hash
*rhs
)
2186 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2188 if (lhs
->dwo_unit
!= NULL
2189 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2192 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2195 /* Hash function for a quick_file_names. */
2198 hash_file_name_entry (const void *e
)
2200 const struct quick_file_names
*file_data
= e
;
2202 return hash_stmt_list_entry (&file_data
->hash
);
2205 /* Equality function for a quick_file_names. */
2208 eq_file_name_entry (const void *a
, const void *b
)
2210 const struct quick_file_names
*ea
= a
;
2211 const struct quick_file_names
*eb
= b
;
2213 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2216 /* Delete function for a quick_file_names. */
2219 delete_file_name_entry (void *e
)
2221 struct quick_file_names
*file_data
= e
;
2224 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2226 xfree ((void*) file_data
->file_names
[i
]);
2227 if (file_data
->real_names
)
2228 xfree ((void*) file_data
->real_names
[i
]);
2231 /* The space for the struct itself lives on objfile_obstack,
2232 so we don't free it here. */
2235 /* Create a quick_file_names hash table. */
2238 create_quick_file_names_table (unsigned int nr_initial_entries
)
2240 return htab_create_alloc (nr_initial_entries
,
2241 hash_file_name_entry
, eq_file_name_entry
,
2242 delete_file_name_entry
, xcalloc
, xfree
);
2245 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2246 have to be created afterwards. You should call age_cached_comp_units after
2247 processing PER_CU->CU. dw2_setup must have been already called. */
2250 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2252 if (per_cu
->is_debug_types
)
2253 load_full_type_unit (per_cu
);
2255 load_full_comp_unit (per_cu
, language_minimal
);
2257 gdb_assert (per_cu
->cu
!= NULL
);
2259 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2262 /* Read in the symbols for PER_CU. */
2265 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2267 struct cleanup
*back_to
;
2269 /* Skip type_unit_groups, reading the type units they contain
2270 is handled elsewhere. */
2271 if (IS_TYPE_UNIT_GROUP (per_cu
))
2274 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2276 if (dwarf2_per_objfile
->using_index
2277 ? per_cu
->v
.quick
->symtab
== NULL
2278 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2280 queue_comp_unit (per_cu
, language_minimal
);
2286 /* Age the cache, releasing compilation units that have not
2287 been used recently. */
2288 age_cached_comp_units ();
2290 do_cleanups (back_to
);
2293 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2294 the objfile from which this CU came. Returns the resulting symbol
2297 static struct symtab
*
2298 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2300 gdb_assert (dwarf2_per_objfile
->using_index
);
2301 if (!per_cu
->v
.quick
->symtab
)
2303 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2304 increment_reading_symtab ();
2305 dw2_do_instantiate_symtab (per_cu
);
2306 process_cu_includes ();
2307 do_cleanups (back_to
);
2309 return per_cu
->v
.quick
->symtab
;
2312 /* Return the CU given its index.
2314 This is intended for loops like:
2316 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2317 + dwarf2_per_objfile->n_type_units); ++i)
2319 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2325 static struct dwarf2_per_cu_data
*
2326 dw2_get_cu (int index
)
2328 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2330 index
-= dwarf2_per_objfile
->n_comp_units
;
2331 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2332 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2335 return dwarf2_per_objfile
->all_comp_units
[index
];
2338 /* Return the primary CU given its index.
2339 The difference between this function and dw2_get_cu is in the handling
2340 of type units (TUs). Here we return the type_unit_group object.
2342 This is intended for loops like:
2344 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2345 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2347 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2353 static struct dwarf2_per_cu_data
*
2354 dw2_get_primary_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_unit_groups
);
2360 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2363 return dwarf2_per_objfile
->all_comp_units
[index
];
2366 /* A helper for create_cus_from_index that handles a given list of
2370 create_cus_from_index_list (struct objfile
*objfile
,
2371 const gdb_byte
*cu_list
, offset_type n_elements
,
2372 struct dwarf2_section_info
*section
,
2378 for (i
= 0; i
< n_elements
; i
+= 2)
2380 struct dwarf2_per_cu_data
*the_cu
;
2381 ULONGEST offset
, length
;
2383 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2384 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2385 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2388 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2389 struct dwarf2_per_cu_data
);
2390 the_cu
->offset
.sect_off
= offset
;
2391 the_cu
->length
= length
;
2392 the_cu
->objfile
= objfile
;
2393 the_cu
->info_or_types_section
= section
;
2394 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2395 struct dwarf2_per_cu_quick_data
);
2396 the_cu
->is_dwz
= is_dwz
;
2397 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2401 /* Read the CU list from the mapped index, and use it to create all
2402 the CU objects for this objfile. */
2405 create_cus_from_index (struct objfile
*objfile
,
2406 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2407 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2409 struct dwz_file
*dwz
;
2411 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2412 dwarf2_per_objfile
->all_comp_units
2413 = obstack_alloc (&objfile
->objfile_obstack
,
2414 dwarf2_per_objfile
->n_comp_units
2415 * sizeof (struct dwarf2_per_cu_data
*));
2417 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2418 &dwarf2_per_objfile
->info
, 0, 0);
2420 if (dwz_elements
== 0)
2423 dwz
= dwarf2_get_dwz_file ();
2424 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2425 cu_list_elements
/ 2);
2428 /* Create the signatured type hash table from the index. */
2431 create_signatured_type_table_from_index (struct objfile
*objfile
,
2432 struct dwarf2_section_info
*section
,
2433 const gdb_byte
*bytes
,
2434 offset_type elements
)
2437 htab_t sig_types_hash
;
2439 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2440 dwarf2_per_objfile
->all_type_units
2441 = obstack_alloc (&objfile
->objfile_obstack
,
2442 dwarf2_per_objfile
->n_type_units
2443 * sizeof (struct signatured_type
*));
2445 sig_types_hash
= allocate_signatured_type_table (objfile
);
2447 for (i
= 0; i
< elements
; i
+= 3)
2449 struct signatured_type
*sig_type
;
2450 ULONGEST offset
, type_offset_in_tu
, signature
;
2453 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2454 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2455 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2457 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2460 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2461 struct signatured_type
);
2462 sig_type
->signature
= signature
;
2463 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2464 sig_type
->per_cu
.is_debug_types
= 1;
2465 sig_type
->per_cu
.info_or_types_section
= section
;
2466 sig_type
->per_cu
.offset
.sect_off
= offset
;
2467 sig_type
->per_cu
.objfile
= objfile
;
2468 sig_type
->per_cu
.v
.quick
2469 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2470 struct dwarf2_per_cu_quick_data
);
2472 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2475 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2478 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2481 /* Read the address map data from the mapped index, and use it to
2482 populate the objfile's psymtabs_addrmap. */
2485 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2487 const gdb_byte
*iter
, *end
;
2488 struct obstack temp_obstack
;
2489 struct addrmap
*mutable_map
;
2490 struct cleanup
*cleanup
;
2493 obstack_init (&temp_obstack
);
2494 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2495 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2497 iter
= index
->address_table
;
2498 end
= iter
+ index
->address_table_size
;
2500 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2504 ULONGEST hi
, lo
, cu_index
;
2505 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2507 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2509 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2512 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2513 dw2_get_cu (cu_index
));
2516 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2517 &objfile
->objfile_obstack
);
2518 do_cleanups (cleanup
);
2521 /* The hash function for strings in the mapped index. This is the same as
2522 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2523 implementation. This is necessary because the hash function is tied to the
2524 format of the mapped index file. The hash values do not have to match with
2527 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2530 mapped_index_string_hash (int index_version
, const void *p
)
2532 const unsigned char *str
= (const unsigned char *) p
;
2536 while ((c
= *str
++) != 0)
2538 if (index_version
>= 5)
2540 r
= r
* 67 + c
- 113;
2546 /* Find a slot in the mapped index INDEX for the object named NAME.
2547 If NAME is found, set *VEC_OUT to point to the CU vector in the
2548 constant pool and return 1. If NAME cannot be found, return 0. */
2551 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2552 offset_type
**vec_out
)
2554 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2556 offset_type slot
, step
;
2557 int (*cmp
) (const char *, const char *);
2559 if (current_language
->la_language
== language_cplus
2560 || current_language
->la_language
== language_java
2561 || current_language
->la_language
== language_fortran
)
2563 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2565 const char *paren
= strchr (name
, '(');
2571 dup
= xmalloc (paren
- name
+ 1);
2572 memcpy (dup
, name
, paren
- name
);
2573 dup
[paren
- name
] = 0;
2575 make_cleanup (xfree
, dup
);
2580 /* Index version 4 did not support case insensitive searches. But the
2581 indices for case insensitive languages are built in lowercase, therefore
2582 simulate our NAME being searched is also lowercased. */
2583 hash
= mapped_index_string_hash ((index
->version
== 4
2584 && case_sensitivity
== case_sensitive_off
2585 ? 5 : index
->version
),
2588 slot
= hash
& (index
->symbol_table_slots
- 1);
2589 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2590 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2594 /* Convert a slot number to an offset into the table. */
2595 offset_type i
= 2 * slot
;
2597 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2599 do_cleanups (back_to
);
2603 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2604 if (!cmp (name
, str
))
2606 *vec_out
= (offset_type
*) (index
->constant_pool
2607 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2608 do_cleanups (back_to
);
2612 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2616 /* A helper function that reads the .gdb_index from SECTION and fills
2617 in MAP. FILENAME is the name of the file containing the section;
2618 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2619 ok to use deprecated sections.
2621 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2622 out parameters that are filled in with information about the CU and
2623 TU lists in the section.
2625 Returns 1 if all went well, 0 otherwise. */
2628 read_index_from_section (struct objfile
*objfile
,
2629 const char *filename
,
2631 struct dwarf2_section_info
*section
,
2632 struct mapped_index
*map
,
2633 const gdb_byte
**cu_list
,
2634 offset_type
*cu_list_elements
,
2635 const gdb_byte
**types_list
,
2636 offset_type
*types_list_elements
)
2639 offset_type version
;
2640 offset_type
*metadata
;
2643 if (dwarf2_section_empty_p (section
))
2646 /* Older elfutils strip versions could keep the section in the main
2647 executable while splitting it for the separate debug info file. */
2648 if ((bfd_get_file_flags (section
->asection
) & SEC_HAS_CONTENTS
) == 0)
2651 dwarf2_read_section (objfile
, section
);
2653 addr
= section
->buffer
;
2654 /* Version check. */
2655 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2656 /* Versions earlier than 3 emitted every copy of a psymbol. This
2657 causes the index to behave very poorly for certain requests. Version 3
2658 contained incomplete addrmap. So, it seems better to just ignore such
2662 static int warning_printed
= 0;
2663 if (!warning_printed
)
2665 warning (_("Skipping obsolete .gdb_index section in %s."),
2667 warning_printed
= 1;
2671 /* Index version 4 uses a different hash function than index version
2674 Versions earlier than 6 did not emit psymbols for inlined
2675 functions. Using these files will cause GDB not to be able to
2676 set breakpoints on inlined functions by name, so we ignore these
2677 indices unless the user has done
2678 "set use-deprecated-index-sections on". */
2679 if (version
< 6 && !deprecated_ok
)
2681 static int warning_printed
= 0;
2682 if (!warning_printed
)
2685 Skipping deprecated .gdb_index section in %s.\n\
2686 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2687 to use the section anyway."),
2689 warning_printed
= 1;
2693 /* Indexes with higher version than the one supported by GDB may be no
2694 longer backward compatible. */
2698 map
->version
= version
;
2699 map
->total_size
= section
->size
;
2701 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2704 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2705 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2709 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2710 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2711 - MAYBE_SWAP (metadata
[i
]))
2715 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2716 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2717 - MAYBE_SWAP (metadata
[i
]));
2720 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2721 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2722 - MAYBE_SWAP (metadata
[i
]))
2723 / (2 * sizeof (offset_type
)));
2726 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2732 /* Read the index file. If everything went ok, initialize the "quick"
2733 elements of all the CUs and return 1. Otherwise, return 0. */
2736 dwarf2_read_index (struct objfile
*objfile
)
2738 struct mapped_index local_map
, *map
;
2739 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2740 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2742 if (!read_index_from_section (objfile
, objfile
->name
,
2743 use_deprecated_index_sections
,
2744 &dwarf2_per_objfile
->gdb_index
, &local_map
,
2745 &cu_list
, &cu_list_elements
,
2746 &types_list
, &types_list_elements
))
2749 /* Don't use the index if it's empty. */
2750 if (local_map
.symbol_table_slots
== 0)
2753 /* If there is a .dwz file, read it so we can get its CU list as
2755 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
2757 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
2758 struct mapped_index dwz_map
;
2759 const gdb_byte
*dwz_types_ignore
;
2760 offset_type dwz_types_elements_ignore
;
2762 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
2764 &dwz
->gdb_index
, &dwz_map
,
2765 &dwz_list
, &dwz_list_elements
,
2767 &dwz_types_elements_ignore
))
2769 warning (_("could not read '.gdb_index' section from %s; skipping"),
2770 bfd_get_filename (dwz
->dwz_bfd
));
2775 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
2778 if (types_list_elements
)
2780 struct dwarf2_section_info
*section
;
2782 /* We can only handle a single .debug_types when we have an
2784 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2787 section
= VEC_index (dwarf2_section_info_def
,
2788 dwarf2_per_objfile
->types
, 0);
2790 create_signatured_type_table_from_index (objfile
, section
, types_list
,
2791 types_list_elements
);
2794 create_addrmap_from_index (objfile
, &local_map
);
2796 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
2799 dwarf2_per_objfile
->index_table
= map
;
2800 dwarf2_per_objfile
->using_index
= 1;
2801 dwarf2_per_objfile
->quick_file_names_table
=
2802 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2807 /* A helper for the "quick" functions which sets the global
2808 dwarf2_per_objfile according to OBJFILE. */
2811 dw2_setup (struct objfile
*objfile
)
2813 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2814 gdb_assert (dwarf2_per_objfile
);
2817 /* Reader function for dw2_build_type_unit_groups. */
2820 dw2_build_type_unit_groups_reader (const struct die_reader_specs
*reader
,
2822 struct die_info
*type_unit_die
,
2826 struct dwarf2_cu
*cu
= reader
->cu
;
2827 struct attribute
*attr
;
2828 struct type_unit_group
*tu_group
;
2830 gdb_assert (data
== NULL
);
2835 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
2836 /* Call this for its side-effect of creating the associated
2837 struct type_unit_group if it doesn't already exist. */
2838 tu_group
= get_type_unit_group (cu
, attr
);
2841 /* Build dwarf2_per_objfile->type_unit_groups.
2842 This function may be called multiple times. */
2845 dw2_build_type_unit_groups (void)
2847 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
2848 build_type_unit_groups (dw2_build_type_unit_groups_reader
, NULL
);
2851 /* die_reader_func for dw2_get_file_names. */
2854 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2856 struct die_info
*comp_unit_die
,
2860 struct dwarf2_cu
*cu
= reader
->cu
;
2861 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2862 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2863 struct dwarf2_per_cu_data
*lh_cu
;
2864 struct line_header
*lh
;
2865 struct attribute
*attr
;
2867 char *name
, *comp_dir
;
2869 struct quick_file_names
*qfn
;
2870 unsigned int line_offset
;
2872 /* Our callers never want to match partial units -- instead they
2873 will match the enclosing full CU. */
2874 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2876 this_cu
->v
.quick
->no_file_data
= 1;
2880 /* If we're reading the line header for TUs, store it in the "per_cu"
2882 if (this_cu
->is_debug_types
)
2884 struct type_unit_group
*tu_group
= data
;
2886 gdb_assert (tu_group
!= NULL
);
2887 lh_cu
= &tu_group
->per_cu
;
2896 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2899 struct quick_file_names find_entry
;
2901 line_offset
= DW_UNSND (attr
);
2903 /* We may have already read in this line header (TU line header sharing).
2904 If we have we're done. */
2905 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2906 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2907 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2908 &find_entry
, INSERT
);
2911 lh_cu
->v
.quick
->file_names
= *slot
;
2915 lh
= dwarf_decode_line_header (line_offset
, cu
);
2919 lh_cu
->v
.quick
->no_file_data
= 1;
2923 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2924 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2925 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2926 gdb_assert (slot
!= NULL
);
2929 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2931 qfn
->num_file_names
= lh
->num_file_names
;
2932 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2933 lh
->num_file_names
* sizeof (char *));
2934 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2935 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2936 qfn
->real_names
= NULL
;
2938 free_line_header (lh
);
2940 lh_cu
->v
.quick
->file_names
= qfn
;
2943 /* A helper for the "quick" functions which attempts to read the line
2944 table for THIS_CU. */
2946 static struct quick_file_names
*
2947 dw2_get_file_names (struct objfile
*objfile
,
2948 struct dwarf2_per_cu_data
*this_cu
)
2950 /* For TUs this should only be called on the parent group. */
2951 if (this_cu
->is_debug_types
)
2952 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2954 if (this_cu
->v
.quick
->file_names
!= NULL
)
2955 return this_cu
->v
.quick
->file_names
;
2956 /* If we know there is no line data, no point in looking again. */
2957 if (this_cu
->v
.quick
->no_file_data
)
2960 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2961 in the stub for CUs, there's is no need to lookup the DWO file.
2962 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2964 if (this_cu
->is_debug_types
)
2966 struct type_unit_group
*tu_group
= this_cu
->s
.type_unit_group
;
2968 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2969 dw2_get_file_names_reader
, tu_group
);
2972 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2974 if (this_cu
->v
.quick
->no_file_data
)
2976 return this_cu
->v
.quick
->file_names
;
2979 /* A helper for the "quick" functions which computes and caches the
2980 real path for a given file name from the line table. */
2983 dw2_get_real_path (struct objfile
*objfile
,
2984 struct quick_file_names
*qfn
, int index
)
2986 if (qfn
->real_names
== NULL
)
2987 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2988 qfn
->num_file_names
, sizeof (char *));
2990 if (qfn
->real_names
[index
] == NULL
)
2991 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2993 return qfn
->real_names
[index
];
2996 static struct symtab
*
2997 dw2_find_last_source_symtab (struct objfile
*objfile
)
3001 dw2_setup (objfile
);
3002 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3003 return dw2_instantiate_symtab (dw2_get_cu (index
));
3006 /* Traversal function for dw2_forget_cached_source_info. */
3009 dw2_free_cached_file_names (void **slot
, void *info
)
3011 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3013 if (file_data
->real_names
)
3017 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3019 xfree ((void*) file_data
->real_names
[i
]);
3020 file_data
->real_names
[i
] = NULL
;
3028 dw2_forget_cached_source_info (struct objfile
*objfile
)
3030 dw2_setup (objfile
);
3032 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3033 dw2_free_cached_file_names
, NULL
);
3036 /* Helper function for dw2_map_symtabs_matching_filename that expands
3037 the symtabs and calls the iterator. */
3040 dw2_map_expand_apply (struct objfile
*objfile
,
3041 struct dwarf2_per_cu_data
*per_cu
,
3043 const char *full_path
, const char *real_path
,
3044 int (*callback
) (struct symtab
*, void *),
3047 struct symtab
*last_made
= objfile
->symtabs
;
3049 /* Don't visit already-expanded CUs. */
3050 if (per_cu
->v
.quick
->symtab
)
3053 /* This may expand more than one symtab, and we want to iterate over
3055 dw2_instantiate_symtab (per_cu
);
3057 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
3058 objfile
->symtabs
, last_made
);
3061 /* Implementation of the map_symtabs_matching_filename method. */
3064 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3065 const char *full_path
, const char *real_path
,
3066 int (*callback
) (struct symtab
*, void *),
3070 const char *name_basename
= lbasename (name
);
3071 int is_abs
= IS_ABSOLUTE_PATH (name
);
3073 dw2_setup (objfile
);
3075 dw2_build_type_unit_groups ();
3077 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3078 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3081 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3082 struct quick_file_names
*file_data
;
3084 /* We only need to look at symtabs not already expanded. */
3085 if (per_cu
->v
.quick
->symtab
)
3088 file_data
= dw2_get_file_names (objfile
, per_cu
);
3089 if (file_data
== NULL
)
3092 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3094 const char *this_name
= file_data
->file_names
[j
];
3096 if (FILENAME_CMP (name
, this_name
) == 0
3097 || (!is_abs
&& compare_filenames_for_search (this_name
, name
)))
3099 if (dw2_map_expand_apply (objfile
, per_cu
,
3100 name
, full_path
, real_path
,
3105 /* Before we invoke realpath, which can get expensive when many
3106 files are involved, do a quick comparison of the basenames. */
3107 if (! basenames_may_differ
3108 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3111 if (full_path
!= NULL
)
3113 const char *this_real_name
= dw2_get_real_path (objfile
,
3116 if (this_real_name
!= NULL
3117 && (FILENAME_CMP (full_path
, this_real_name
) == 0
3119 && compare_filenames_for_search (this_real_name
,
3122 if (dw2_map_expand_apply (objfile
, per_cu
,
3123 name
, full_path
, real_path
,
3129 if (real_path
!= NULL
)
3131 const char *this_real_name
= dw2_get_real_path (objfile
,
3134 if (this_real_name
!= NULL
3135 && (FILENAME_CMP (real_path
, this_real_name
) == 0
3137 && compare_filenames_for_search (this_real_name
,
3140 if (dw2_map_expand_apply (objfile
, per_cu
,
3141 name
, full_path
, real_path
,
3152 static struct symtab
*
3153 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3154 const char *name
, domain_enum domain
)
3156 /* We do all the work in the pre_expand_symtabs_matching hook
3161 /* A helper function that expands all symtabs that hold an object
3162 named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
3163 symbols in block BLOCK_KIND. */
3166 dw2_do_expand_symtabs_matching (struct objfile
*objfile
,
3167 int want_specific_block
,
3168 enum block_enum block_kind
,
3169 const char *name
, domain_enum domain
)
3171 struct mapped_index
*index
;
3173 dw2_setup (objfile
);
3175 index
= dwarf2_per_objfile
->index_table
;
3177 /* index_table is NULL if OBJF_READNOW. */
3182 if (find_slot_in_mapped_hash (index
, name
, &vec
))
3184 offset_type i
, len
= MAYBE_SWAP (*vec
);
3185 for (i
= 0; i
< len
; ++i
)
3187 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[i
+ 1]);
3188 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3189 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3190 int want_static
= block_kind
!= GLOBAL_BLOCK
;
3191 /* This value is only valid for index versions >= 7. */
3192 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3193 gdb_index_symbol_kind symbol_kind
=
3194 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3195 /* Only check the symbol attributes if they're present.
3196 Indices prior to version 7 don't record them,
3197 and indices >= 7 may elide them for certain symbols
3198 (gold does this). */
3200 (index
->version
>= 7
3201 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3204 && want_specific_block
3205 && want_static
!= is_static
)
3208 /* Only check the symbol's kind if it has one. */
3214 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3215 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3216 /* Some types are also in VAR_DOMAIN. */
3217 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3221 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3225 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3233 dw2_instantiate_symtab (per_cu
);
3240 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
3241 enum block_enum block_kind
, const char *name
,
3244 dw2_do_expand_symtabs_matching (objfile
, 1, block_kind
, name
, domain
);
3248 dw2_print_stats (struct objfile
*objfile
)
3252 dw2_setup (objfile
);
3254 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3255 + dwarf2_per_objfile
->n_type_units
); ++i
)
3257 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3259 if (!per_cu
->v
.quick
->symtab
)
3262 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3266 dw2_dump (struct objfile
*objfile
)
3268 /* Nothing worth printing. */
3272 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3273 struct section_offsets
*delta
)
3275 /* There's nothing to relocate here. */
3279 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3280 const char *func_name
)
3282 /* Note: It doesn't matter what we pass for block_kind here. */
3283 dw2_do_expand_symtabs_matching (objfile
, 0, GLOBAL_BLOCK
, func_name
,
3288 dw2_expand_all_symtabs (struct objfile
*objfile
)
3292 dw2_setup (objfile
);
3294 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3295 + dwarf2_per_objfile
->n_type_units
); ++i
)
3297 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3299 dw2_instantiate_symtab (per_cu
);
3304 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3305 const char *filename
)
3309 dw2_setup (objfile
);
3311 /* We don't need to consider type units here.
3312 This is only called for examining code, e.g. expand_line_sal.
3313 There can be an order of magnitude (or more) more type units
3314 than comp units, and we avoid them if we can. */
3316 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3319 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3320 struct quick_file_names
*file_data
;
3322 /* We only need to look at symtabs not already expanded. */
3323 if (per_cu
->v
.quick
->symtab
)
3326 file_data
= dw2_get_file_names (objfile
, per_cu
);
3327 if (file_data
== NULL
)
3330 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3332 const char *this_name
= file_data
->file_names
[j
];
3333 if (FILENAME_CMP (this_name
, filename
) == 0)
3335 dw2_instantiate_symtab (per_cu
);
3342 /* A helper function for dw2_find_symbol_file that finds the primary
3343 file name for a given CU. This is a die_reader_func. */
3346 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3348 struct die_info
*comp_unit_die
,
3352 const char **result_ptr
= data
;
3353 struct dwarf2_cu
*cu
= reader
->cu
;
3354 struct attribute
*attr
;
3356 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3360 *result_ptr
= DW_STRING (attr
);
3364 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3366 struct dwarf2_per_cu_data
*per_cu
;
3368 const char *filename
;
3370 dw2_setup (objfile
);
3372 /* index_table is NULL if OBJF_READNOW. */
3373 if (!dwarf2_per_objfile
->index_table
)
3377 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3379 struct blockvector
*bv
= BLOCKVECTOR (s
);
3380 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3381 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3384 return SYMBOL_SYMTAB (sym
)->filename
;
3389 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3393 /* Note that this just looks at the very first one named NAME -- but
3394 actually we are looking for a function. find_main_filename
3395 should be rewritten so that it doesn't require a custom hook. It
3396 could just use the ordinary symbol tables. */
3397 /* vec[0] is the length, which must always be >0. */
3398 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3400 if (per_cu
->v
.quick
->symtab
!= NULL
)
3401 return per_cu
->v
.quick
->symtab
->filename
;
3403 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3404 dw2_get_primary_filename_reader
, &filename
);
3410 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3411 struct objfile
*objfile
, int global
,
3412 int (*callback
) (struct block
*,
3413 struct symbol
*, void *),
3414 void *data
, symbol_compare_ftype
*match
,
3415 symbol_compare_ftype
*ordered_compare
)
3417 /* Currently unimplemented; used for Ada. The function can be called if the
3418 current language is Ada for a non-Ada objfile using GNU index. As Ada
3419 does not look for non-Ada symbols this function should just return. */
3423 dw2_expand_symtabs_matching
3424 (struct objfile
*objfile
,
3425 int (*file_matcher
) (const char *, void *),
3426 int (*name_matcher
) (const char *, void *),
3427 enum search_domain kind
,
3432 struct mapped_index
*index
;
3434 dw2_setup (objfile
);
3436 /* index_table is NULL if OBJF_READNOW. */
3437 if (!dwarf2_per_objfile
->index_table
)
3439 index
= dwarf2_per_objfile
->index_table
;
3441 if (file_matcher
!= NULL
)
3443 struct cleanup
*cleanup
;
3444 htab_t visited_found
, visited_not_found
;
3446 dw2_build_type_unit_groups ();
3448 visited_found
= htab_create_alloc (10,
3449 htab_hash_pointer
, htab_eq_pointer
,
3450 NULL
, xcalloc
, xfree
);
3451 cleanup
= make_cleanup_htab_delete (visited_found
);
3452 visited_not_found
= htab_create_alloc (10,
3453 htab_hash_pointer
, htab_eq_pointer
,
3454 NULL
, xcalloc
, xfree
);
3455 make_cleanup_htab_delete (visited_not_found
);
3457 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3458 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3461 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3462 struct quick_file_names
*file_data
;
3465 per_cu
->v
.quick
->mark
= 0;
3467 /* We only need to look at symtabs not already expanded. */
3468 if (per_cu
->v
.quick
->symtab
)
3471 file_data
= dw2_get_file_names (objfile
, per_cu
);
3472 if (file_data
== NULL
)
3475 if (htab_find (visited_not_found
, file_data
) != NULL
)
3477 else if (htab_find (visited_found
, file_data
) != NULL
)
3479 per_cu
->v
.quick
->mark
= 1;
3483 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3485 if (file_matcher (file_data
->file_names
[j
], data
))
3487 per_cu
->v
.quick
->mark
= 1;
3492 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3494 : visited_not_found
,
3499 do_cleanups (cleanup
);
3502 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3504 offset_type idx
= 2 * iter
;
3506 offset_type
*vec
, vec_len
, vec_idx
;
3508 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3511 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3513 if (! (*name_matcher
) (name
, data
))
3516 /* The name was matched, now expand corresponding CUs that were
3518 vec
= (offset_type
*) (index
->constant_pool
3519 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3520 vec_len
= MAYBE_SWAP (vec
[0]);
3521 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3523 struct dwarf2_per_cu_data
*per_cu
;
3524 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3525 gdb_index_symbol_kind symbol_kind
=
3526 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3527 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3529 /* Don't crash on bad data. */
3530 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3531 + dwarf2_per_objfile
->n_type_units
))
3534 /* Only check the symbol's kind if it has one.
3535 Indices prior to version 7 don't record it. */
3536 if (index
->version
>= 7)
3540 case VARIABLES_DOMAIN
:
3541 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3544 case FUNCTIONS_DOMAIN
:
3545 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3549 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3557 per_cu
= dw2_get_cu (cu_index
);
3558 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3559 dw2_instantiate_symtab (per_cu
);
3564 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3567 static struct symtab
*
3568 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3572 if (BLOCKVECTOR (symtab
) != NULL
3573 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3576 if (symtab
->includes
== NULL
)
3579 for (i
= 0; symtab
->includes
[i
]; ++i
)
3581 struct symtab
*s
= symtab
->includes
[i
];
3583 s
= recursively_find_pc_sect_symtab (s
, pc
);
3591 static struct symtab
*
3592 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3593 struct minimal_symbol
*msymbol
,
3595 struct obj_section
*section
,
3598 struct dwarf2_per_cu_data
*data
;
3599 struct symtab
*result
;
3601 dw2_setup (objfile
);
3603 if (!objfile
->psymtabs_addrmap
)
3606 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3610 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3611 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3612 paddress (get_objfile_arch (objfile
), pc
));
3614 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3615 gdb_assert (result
!= NULL
);
3620 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3621 void *data
, int need_fullname
)
3624 struct cleanup
*cleanup
;
3625 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3626 NULL
, xcalloc
, xfree
);
3628 cleanup
= make_cleanup_htab_delete (visited
);
3629 dw2_setup (objfile
);
3631 dw2_build_type_unit_groups ();
3633 /* We can ignore file names coming from already-expanded CUs. */
3634 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3635 + dwarf2_per_objfile
->n_type_units
); ++i
)
3637 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3639 if (per_cu
->v
.quick
->symtab
)
3641 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3644 *slot
= per_cu
->v
.quick
->file_names
;
3648 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3649 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3652 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3653 struct quick_file_names
*file_data
;
3656 /* We only need to look at symtabs not already expanded. */
3657 if (per_cu
->v
.quick
->symtab
)
3660 file_data
= dw2_get_file_names (objfile
, per_cu
);
3661 if (file_data
== NULL
)
3664 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3667 /* Already visited. */
3672 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3674 const char *this_real_name
;
3677 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3679 this_real_name
= NULL
;
3680 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3684 do_cleanups (cleanup
);
3688 dw2_has_symbols (struct objfile
*objfile
)
3693 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3696 dw2_find_last_source_symtab
,
3697 dw2_forget_cached_source_info
,
3698 dw2_map_symtabs_matching_filename
,
3700 dw2_pre_expand_symtabs_matching
,
3704 dw2_expand_symtabs_for_function
,
3705 dw2_expand_all_symtabs
,
3706 dw2_expand_symtabs_with_filename
,
3707 dw2_find_symbol_file
,
3708 dw2_map_matching_symbols
,
3709 dw2_expand_symtabs_matching
,
3710 dw2_find_pc_sect_symtab
,
3711 dw2_map_symbol_filenames
3714 /* Initialize for reading DWARF for this objfile. Return 0 if this
3715 file will use psymtabs, or 1 if using the GNU index. */
3718 dwarf2_initialize_objfile (struct objfile
*objfile
)
3720 /* If we're about to read full symbols, don't bother with the
3721 indices. In this case we also don't care if some other debug
3722 format is making psymtabs, because they are all about to be
3724 if ((objfile
->flags
& OBJF_READNOW
))
3728 dwarf2_per_objfile
->using_index
= 1;
3729 create_all_comp_units (objfile
);
3730 create_all_type_units (objfile
);
3731 dwarf2_per_objfile
->quick_file_names_table
=
3732 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3734 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3735 + dwarf2_per_objfile
->n_type_units
); ++i
)
3737 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3739 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3740 struct dwarf2_per_cu_quick_data
);
3743 /* Return 1 so that gdb sees the "quick" functions. However,
3744 these functions will be no-ops because we will have expanded
3749 if (dwarf2_read_index (objfile
))
3757 /* Build a partial symbol table. */
3760 dwarf2_build_psymtabs (struct objfile
*objfile
)
3762 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3764 init_psymbol_list (objfile
, 1024);
3767 dwarf2_build_psymtabs_hard (objfile
);
3770 /* Return the total length of the CU described by HEADER. */
3773 get_cu_length (const struct comp_unit_head
*header
)
3775 return header
->initial_length_size
+ header
->length
;
3778 /* Return TRUE if OFFSET is within CU_HEADER. */
3781 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3783 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3784 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3786 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3789 /* Find the base address of the compilation unit for range lists and
3790 location lists. It will normally be specified by DW_AT_low_pc.
3791 In DWARF-3 draft 4, the base address could be overridden by
3792 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3793 compilation units with discontinuous ranges. */
3796 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3798 struct attribute
*attr
;
3801 cu
->base_address
= 0;
3803 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3806 cu
->base_address
= DW_ADDR (attr
);
3811 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3814 cu
->base_address
= DW_ADDR (attr
);
3820 /* Read in the comp unit header information from the debug_info at info_ptr.
3821 NOTE: This leaves members offset, first_die_offset to be filled in
3825 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3826 gdb_byte
*info_ptr
, bfd
*abfd
)
3829 unsigned int bytes_read
;
3831 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3832 cu_header
->initial_length_size
= bytes_read
;
3833 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3834 info_ptr
+= bytes_read
;
3835 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3837 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3839 info_ptr
+= bytes_read
;
3840 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3842 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3843 if (signed_addr
< 0)
3844 internal_error (__FILE__
, __LINE__
,
3845 _("read_comp_unit_head: dwarf from non elf file"));
3846 cu_header
->signed_addr_p
= signed_addr
;
3851 /* Helper function that returns the proper abbrev section for
3854 static struct dwarf2_section_info
*
3855 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3857 struct dwarf2_section_info
*abbrev
;
3859 if (this_cu
->is_dwz
)
3860 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3862 abbrev
= &dwarf2_per_objfile
->abbrev
;
3867 /* Subroutine of read_and_check_comp_unit_head and
3868 read_and_check_type_unit_head to simplify them.
3869 Perform various error checking on the header. */
3872 error_check_comp_unit_head (struct comp_unit_head
*header
,
3873 struct dwarf2_section_info
*section
,
3874 struct dwarf2_section_info
*abbrev_section
)
3876 bfd
*abfd
= section
->asection
->owner
;
3877 const char *filename
= bfd_get_filename (abfd
);
3879 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3880 error (_("Dwarf Error: wrong version in compilation unit header "
3881 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3884 if (header
->abbrev_offset
.sect_off
3885 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3886 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3887 "(offset 0x%lx + 6) [in module %s]"),
3888 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3891 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3892 avoid potential 32-bit overflow. */
3893 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3895 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3896 "(offset 0x%lx + 0) [in module %s]"),
3897 (long) header
->length
, (long) header
->offset
.sect_off
,
3901 /* Read in a CU/TU header and perform some basic error checking.
3902 The contents of the header are stored in HEADER.
3903 The result is a pointer to the start of the first DIE. */
3906 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3907 struct dwarf2_section_info
*section
,
3908 struct dwarf2_section_info
*abbrev_section
,
3910 int is_debug_types_section
)
3912 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3913 bfd
*abfd
= section
->asection
->owner
;
3915 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3917 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3919 /* If we're reading a type unit, skip over the signature and
3920 type_offset fields. */
3921 if (is_debug_types_section
)
3922 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3924 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3926 error_check_comp_unit_head (header
, section
, abbrev_section
);
3931 /* Read in the types comp unit header information from .debug_types entry at
3932 types_ptr. The result is a pointer to one past the end of the header. */
3935 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3936 struct dwarf2_section_info
*section
,
3937 struct dwarf2_section_info
*abbrev_section
,
3939 ULONGEST
*signature
,
3940 cu_offset
*type_offset_in_tu
)
3942 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3943 bfd
*abfd
= section
->asection
->owner
;
3945 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3947 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3949 /* If we're reading a type unit, skip over the signature and
3950 type_offset fields. */
3951 if (signature
!= NULL
)
3952 *signature
= read_8_bytes (abfd
, info_ptr
);
3954 if (type_offset_in_tu
!= NULL
)
3955 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3956 header
->offset_size
);
3957 info_ptr
+= header
->offset_size
;
3959 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3961 error_check_comp_unit_head (header
, section
, abbrev_section
);
3966 /* Fetch the abbreviation table offset from a comp or type unit header. */
3969 read_abbrev_offset (struct dwarf2_section_info
*section
,
3972 bfd
*abfd
= section
->asection
->owner
;
3974 unsigned int length
, initial_length_size
, offset_size
;
3975 sect_offset abbrev_offset
;
3977 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
3978 info_ptr
= section
->buffer
+ offset
.sect_off
;
3979 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
3980 offset_size
= initial_length_size
== 4 ? 4 : 8;
3981 info_ptr
+= initial_length_size
+ 2 /*version*/;
3982 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
3983 return abbrev_offset
;
3986 /* Allocate a new partial symtab for file named NAME and mark this new
3987 partial symtab as being an include of PST. */
3990 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3991 struct objfile
*objfile
)
3993 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3995 subpst
->section_offsets
= pst
->section_offsets
;
3996 subpst
->textlow
= 0;
3997 subpst
->texthigh
= 0;
3999 subpst
->dependencies
= (struct partial_symtab
**)
4000 obstack_alloc (&objfile
->objfile_obstack
,
4001 sizeof (struct partial_symtab
*));
4002 subpst
->dependencies
[0] = pst
;
4003 subpst
->number_of_dependencies
= 1;
4005 subpst
->globals_offset
= 0;
4006 subpst
->n_global_syms
= 0;
4007 subpst
->statics_offset
= 0;
4008 subpst
->n_static_syms
= 0;
4009 subpst
->symtab
= NULL
;
4010 subpst
->read_symtab
= pst
->read_symtab
;
4013 /* No private part is necessary for include psymtabs. This property
4014 can be used to differentiate between such include psymtabs and
4015 the regular ones. */
4016 subpst
->read_symtab_private
= NULL
;
4019 /* Read the Line Number Program data and extract the list of files
4020 included by the source file represented by PST. Build an include
4021 partial symtab for each of these included files. */
4024 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4025 struct die_info
*die
,
4026 struct partial_symtab
*pst
)
4028 struct line_header
*lh
= NULL
;
4029 struct attribute
*attr
;
4031 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4033 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4035 return; /* No linetable, so no includes. */
4037 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4038 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4040 free_line_header (lh
);
4044 hash_signatured_type (const void *item
)
4046 const struct signatured_type
*sig_type
= item
;
4048 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4049 return sig_type
->signature
;
4053 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4055 const struct signatured_type
*lhs
= item_lhs
;
4056 const struct signatured_type
*rhs
= item_rhs
;
4058 return lhs
->signature
== rhs
->signature
;
4061 /* Allocate a hash table for signatured types. */
4064 allocate_signatured_type_table (struct objfile
*objfile
)
4066 return htab_create_alloc_ex (41,
4067 hash_signatured_type
,
4070 &objfile
->objfile_obstack
,
4071 hashtab_obstack_allocate
,
4072 dummy_obstack_deallocate
);
4075 /* A helper function to add a signatured type CU to a table. */
4078 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4080 struct signatured_type
*sigt
= *slot
;
4081 struct signatured_type
***datap
= datum
;
4089 /* Create the hash table of all entries in the .debug_types section.
4090 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4092 Note: This function processes DWO files only, not DWP files.
4093 The result is a pointer to the hash table or NULL if there are
4097 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4098 VEC (dwarf2_section_info_def
) *types
)
4100 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4101 htab_t types_htab
= NULL
;
4103 struct dwarf2_section_info
*section
;
4104 struct dwarf2_section_info
*abbrev_section
;
4106 if (VEC_empty (dwarf2_section_info_def
, types
))
4109 abbrev_section
= (dwo_file
!= NULL
4110 ? &dwo_file
->sections
.abbrev
4111 : &dwarf2_per_objfile
->abbrev
);
4113 if (dwarf2_read_debug
)
4114 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4115 dwo_file
? ".dwo" : "",
4116 bfd_get_filename (abbrev_section
->asection
->owner
));
4119 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4123 gdb_byte
*info_ptr
, *end_ptr
;
4124 struct dwarf2_section_info
*abbrev_section
;
4126 dwarf2_read_section (objfile
, section
);
4127 info_ptr
= section
->buffer
;
4129 if (info_ptr
== NULL
)
4132 /* We can't set abfd until now because the section may be empty or
4133 not present, in which case section->asection will be NULL. */
4134 abfd
= section
->asection
->owner
;
4137 abbrev_section
= &dwo_file
->sections
.abbrev
;
4139 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4141 if (types_htab
== NULL
)
4144 types_htab
= allocate_dwo_unit_table (objfile
);
4146 types_htab
= allocate_signatured_type_table (objfile
);
4149 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4150 because we don't need to read any dies: the signature is in the
4153 end_ptr
= info_ptr
+ section
->size
;
4154 while (info_ptr
< end_ptr
)
4157 cu_offset type_offset_in_tu
;
4159 struct signatured_type
*sig_type
;
4160 struct dwo_unit
*dwo_tu
;
4162 gdb_byte
*ptr
= info_ptr
;
4163 struct comp_unit_head header
;
4164 unsigned int length
;
4166 offset
.sect_off
= ptr
- section
->buffer
;
4168 /* We need to read the type's signature in order to build the hash
4169 table, but we don't need anything else just yet. */
4171 ptr
= read_and_check_type_unit_head (&header
, section
,
4172 abbrev_section
, ptr
,
4173 &signature
, &type_offset_in_tu
);
4175 length
= get_cu_length (&header
);
4177 /* Skip dummy type units. */
4178 if (ptr
>= info_ptr
+ length
4179 || peek_abbrev_code (abfd
, ptr
) == 0)
4188 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4190 dwo_tu
->dwo_file
= dwo_file
;
4191 dwo_tu
->signature
= signature
;
4192 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4193 dwo_tu
->info_or_types_section
= section
;
4194 dwo_tu
->offset
= offset
;
4195 dwo_tu
->length
= length
;
4199 /* N.B.: type_offset is not usable if this type uses a DWO file.
4200 The real type_offset is in the DWO file. */
4202 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4203 struct signatured_type
);
4204 sig_type
->signature
= signature
;
4205 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4206 sig_type
->per_cu
.objfile
= objfile
;
4207 sig_type
->per_cu
.is_debug_types
= 1;
4208 sig_type
->per_cu
.info_or_types_section
= section
;
4209 sig_type
->per_cu
.offset
= offset
;
4210 sig_type
->per_cu
.length
= length
;
4213 slot
= htab_find_slot (types_htab
,
4214 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4216 gdb_assert (slot
!= NULL
);
4219 sect_offset dup_offset
;
4223 const struct dwo_unit
*dup_tu
= *slot
;
4225 dup_offset
= dup_tu
->offset
;
4229 const struct signatured_type
*dup_tu
= *slot
;
4231 dup_offset
= dup_tu
->per_cu
.offset
;
4234 complaint (&symfile_complaints
,
4235 _("debug type entry at offset 0x%x is duplicate to the "
4236 "entry at offset 0x%x, signature 0x%s"),
4237 offset
.sect_off
, dup_offset
.sect_off
,
4238 phex (signature
, sizeof (signature
)));
4240 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4242 if (dwarf2_read_debug
)
4243 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4245 phex (signature
, sizeof (signature
)));
4254 /* Create the hash table of all entries in the .debug_types section,
4255 and initialize all_type_units.
4256 The result is zero if there is an error (e.g. missing .debug_types section),
4257 otherwise non-zero. */
4260 create_all_type_units (struct objfile
*objfile
)
4263 struct signatured_type
**iter
;
4265 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4266 if (types_htab
== NULL
)
4268 dwarf2_per_objfile
->signatured_types
= NULL
;
4272 dwarf2_per_objfile
->signatured_types
= types_htab
;
4274 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4275 dwarf2_per_objfile
->all_type_units
4276 = obstack_alloc (&objfile
->objfile_obstack
,
4277 dwarf2_per_objfile
->n_type_units
4278 * sizeof (struct signatured_type
*));
4279 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4280 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4281 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4282 == dwarf2_per_objfile
->n_type_units
);
4287 /* Lookup a signature based type for DW_FORM_ref_sig8.
4288 Returns NULL if signature SIG is not present in the table. */
4290 static struct signatured_type
*
4291 lookup_signatured_type (ULONGEST sig
)
4293 struct signatured_type find_entry
, *entry
;
4295 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4297 complaint (&symfile_complaints
,
4298 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4302 find_entry
.signature
= sig
;
4303 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4307 /* Low level DIE reading support. */
4309 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4312 init_cu_die_reader (struct die_reader_specs
*reader
,
4313 struct dwarf2_cu
*cu
,
4314 struct dwarf2_section_info
*section
,
4315 struct dwo_file
*dwo_file
)
4317 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4318 reader
->abfd
= section
->asection
->owner
;
4320 reader
->dwo_file
= dwo_file
;
4321 reader
->die_section
= section
;
4322 reader
->buffer
= section
->buffer
;
4323 reader
->buffer_end
= section
->buffer
+ section
->size
;
4326 /* Initialize a CU (or TU) and read its DIEs.
4327 If the CU defers to a DWO file, read the DWO file as well.
4329 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4330 Otherwise the table specified in the comp unit header is read in and used.
4331 This is an optimization for when we already have the abbrev table.
4333 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4334 Otherwise, a new CU is allocated with xmalloc.
4336 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4337 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4339 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4340 linker) then DIE_READER_FUNC will not get called. */
4343 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4344 struct abbrev_table
*abbrev_table
,
4345 int use_existing_cu
, int keep
,
4346 die_reader_func_ftype
*die_reader_func
,
4349 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4350 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4351 bfd
*abfd
= section
->asection
->owner
;
4352 struct dwarf2_cu
*cu
;
4353 gdb_byte
*begin_info_ptr
, *info_ptr
;
4354 struct die_reader_specs reader
;
4355 struct die_info
*comp_unit_die
;
4357 struct attribute
*attr
;
4358 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4359 struct signatured_type
*sig_type
= NULL
;
4360 struct dwarf2_section_info
*abbrev_section
;
4361 /* Non-zero if CU currently points to a DWO file and we need to
4362 reread it. When this happens we need to reread the skeleton die
4363 before we can reread the DWO file. */
4364 int rereading_dwo_cu
= 0;
4366 if (dwarf2_die_debug
)
4367 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4368 this_cu
->is_debug_types
? "type" : "comp",
4369 this_cu
->offset
.sect_off
);
4371 if (use_existing_cu
)
4374 cleanups
= make_cleanup (null_cleanup
, NULL
);
4376 /* This is cheap if the section is already read in. */
4377 dwarf2_read_section (objfile
, section
);
4379 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4381 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4383 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4387 /* If this CU is from a DWO file we need to start over, we need to
4388 refetch the attributes from the skeleton CU.
4389 This could be optimized by retrieving those attributes from when we
4390 were here the first time: the previous comp_unit_die was stored in
4391 comp_unit_obstack. But there's no data yet that we need this
4393 if (cu
->dwo_unit
!= NULL
)
4394 rereading_dwo_cu
= 1;
4398 /* If !use_existing_cu, this_cu->cu must be NULL. */
4399 gdb_assert (this_cu
->cu
== NULL
);
4401 cu
= xmalloc (sizeof (*cu
));
4402 init_one_comp_unit (cu
, this_cu
);
4404 /* If an error occurs while loading, release our storage. */
4405 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4408 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4410 /* We already have the header, there's no need to read it in again. */
4411 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4415 if (this_cu
->is_debug_types
)
4418 cu_offset type_offset_in_tu
;
4420 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4421 abbrev_section
, info_ptr
,
4423 &type_offset_in_tu
);
4425 /* Since per_cu is the first member of struct signatured_type,
4426 we can go from a pointer to one to a pointer to the other. */
4427 sig_type
= (struct signatured_type
*) this_cu
;
4428 gdb_assert (sig_type
->signature
== signature
);
4429 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4430 == type_offset_in_tu
.cu_off
);
4431 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4433 /* LENGTH has not been set yet for type units if we're
4434 using .gdb_index. */
4435 this_cu
->length
= get_cu_length (&cu
->header
);
4437 /* Establish the type offset that can be used to lookup the type. */
4438 sig_type
->type_offset_in_section
.sect_off
=
4439 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4443 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4447 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4448 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4452 /* Skip dummy compilation units. */
4453 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4454 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4456 do_cleanups (cleanups
);
4460 /* If we don't have them yet, read the abbrevs for this compilation unit.
4461 And if we need to read them now, make sure they're freed when we're
4462 done. Note that it's important that if the CU had an abbrev table
4463 on entry we don't free it when we're done: Somewhere up the call stack
4464 it may be in use. */
4465 if (abbrev_table
!= NULL
)
4467 gdb_assert (cu
->abbrev_table
== NULL
);
4468 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4469 == abbrev_table
->offset
.sect_off
);
4470 cu
->abbrev_table
= abbrev_table
;
4472 else if (cu
->abbrev_table
== NULL
)
4474 dwarf2_read_abbrevs (cu
, abbrev_section
);
4475 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4477 else if (rereading_dwo_cu
)
4479 dwarf2_free_abbrev_table (cu
);
4480 dwarf2_read_abbrevs (cu
, abbrev_section
);
4483 /* Read the top level CU/TU die. */
4484 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4485 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4487 /* If we have a DWO stub, process it and then read in the DWO file.
4488 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4489 a DWO CU, that this test will fail. */
4490 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4493 char *dwo_name
= DW_STRING (attr
);
4494 const char *comp_dir_string
;
4495 struct dwo_unit
*dwo_unit
;
4496 ULONGEST signature
; /* Or dwo_id. */
4497 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4498 int i
,num_extra_attrs
;
4499 struct dwarf2_section_info
*dwo_abbrev_section
;
4502 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4503 " has children (offset 0x%x) [in module %s]"),
4504 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4506 /* These attributes aren't processed until later:
4507 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4508 However, the attribute is found in the stub which we won't have later.
4509 In order to not impose this complication on the rest of the code,
4510 we read them here and copy them to the DWO CU/TU die. */
4512 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4515 if (! this_cu
->is_debug_types
)
4516 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4517 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4518 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4519 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4520 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4522 /* There should be a DW_AT_addr_base attribute here (if needed).
4523 We need the value before we can process DW_FORM_GNU_addr_index. */
4525 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4527 cu
->addr_base
= DW_UNSND (attr
);
4529 /* There should be a DW_AT_ranges_base attribute here (if needed).
4530 We need the value before we can process DW_AT_ranges. */
4531 cu
->ranges_base
= 0;
4532 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4534 cu
->ranges_base
= DW_UNSND (attr
);
4536 if (this_cu
->is_debug_types
)
4538 gdb_assert (sig_type
!= NULL
);
4539 signature
= sig_type
->signature
;
4543 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4545 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4547 signature
= DW_UNSND (attr
);
4550 /* We may need the comp_dir in order to find the DWO file. */
4551 comp_dir_string
= NULL
;
4553 comp_dir_string
= DW_STRING (comp_dir
);
4555 if (this_cu
->is_debug_types
)
4556 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4558 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4561 if (dwo_unit
== NULL
)
4563 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4564 " with ID %s [in module %s]"),
4565 this_cu
->offset
.sect_off
,
4566 phex (signature
, sizeof (signature
)),
4570 /* Set up for reading the DWO CU/TU. */
4571 cu
->dwo_unit
= dwo_unit
;
4572 section
= dwo_unit
->info_or_types_section
;
4573 dwarf2_read_section (objfile
, section
);
4574 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4575 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4576 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4578 if (this_cu
->is_debug_types
)
4581 cu_offset type_offset_in_tu
;
4583 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4587 &type_offset_in_tu
);
4588 gdb_assert (sig_type
->signature
== signature
);
4589 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4590 /* For DWOs coming from DWP files, we don't know the CU length
4591 nor the type's offset in the TU until now. */
4592 dwo_unit
->length
= get_cu_length (&cu
->header
);
4593 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
4595 /* Establish the type offset that can be used to lookup the type.
4596 For DWO files, we don't know it until now. */
4597 sig_type
->type_offset_in_section
.sect_off
=
4598 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4602 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4605 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4606 /* For DWOs coming from DWP files, we don't know the CU length
4608 dwo_unit
->length
= get_cu_length (&cu
->header
);
4611 /* Discard the original CU's abbrev table, and read the DWO's. */
4612 if (abbrev_table
== NULL
)
4614 dwarf2_free_abbrev_table (cu
);
4615 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4619 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4620 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4623 /* Read in the die, but leave space to copy over the attributes
4624 from the stub. This has the benefit of simplifying the rest of
4625 the code - all the real work is done here. */
4626 num_extra_attrs
= ((stmt_list
!= NULL
)
4630 + (comp_dir
!= NULL
));
4631 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4632 &has_children
, num_extra_attrs
);
4634 /* Copy over the attributes from the stub to the DWO die. */
4635 i
= comp_unit_die
->num_attrs
;
4636 if (stmt_list
!= NULL
)
4637 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4639 comp_unit_die
->attrs
[i
++] = *low_pc
;
4640 if (high_pc
!= NULL
)
4641 comp_unit_die
->attrs
[i
++] = *high_pc
;
4643 comp_unit_die
->attrs
[i
++] = *ranges
;
4644 if (comp_dir
!= NULL
)
4645 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4646 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4648 /* Skip dummy compilation units. */
4649 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4650 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4652 do_cleanups (cleanups
);
4657 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4659 if (free_cu_cleanup
!= NULL
)
4663 /* We've successfully allocated this compilation unit. Let our
4664 caller clean it up when finished with it. */
4665 discard_cleanups (free_cu_cleanup
);
4667 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4668 So we have to manually free the abbrev table. */
4669 dwarf2_free_abbrev_table (cu
);
4671 /* Link this CU into read_in_chain. */
4672 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4673 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4676 do_cleanups (free_cu_cleanup
);
4679 do_cleanups (cleanups
);
4682 /* Read CU/TU THIS_CU in section SECTION,
4683 but do not follow DW_AT_GNU_dwo_name if present.
4684 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4685 to have already done the lookup to find the DWO/DWP file).
4687 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4688 THIS_CU->is_debug_types, but nothing else.
4690 We fill in THIS_CU->length.
4692 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4693 linker) then DIE_READER_FUNC will not get called.
4695 THIS_CU->cu is always freed when done.
4696 This is done in order to not leave THIS_CU->cu in a state where we have
4697 to care whether it refers to the "main" CU or the DWO CU. */
4700 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4701 struct dwarf2_section_info
*abbrev_section
,
4702 struct dwo_file
*dwo_file
,
4703 die_reader_func_ftype
*die_reader_func
,
4706 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4707 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4708 bfd
*abfd
= section
->asection
->owner
;
4709 struct dwarf2_cu cu
;
4710 gdb_byte
*begin_info_ptr
, *info_ptr
;
4711 struct die_reader_specs reader
;
4712 struct cleanup
*cleanups
;
4713 struct die_info
*comp_unit_die
;
4716 if (dwarf2_die_debug
)
4717 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4718 this_cu
->is_debug_types
? "type" : "comp",
4719 this_cu
->offset
.sect_off
);
4721 gdb_assert (this_cu
->cu
== NULL
);
4723 /* This is cheap if the section is already read in. */
4724 dwarf2_read_section (objfile
, section
);
4726 init_one_comp_unit (&cu
, this_cu
);
4728 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4730 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4731 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4732 abbrev_section
, info_ptr
,
4733 this_cu
->is_debug_types
);
4735 this_cu
->length
= get_cu_length (&cu
.header
);
4737 /* Skip dummy compilation units. */
4738 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4739 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4741 do_cleanups (cleanups
);
4745 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4746 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4748 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4749 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4751 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4753 do_cleanups (cleanups
);
4756 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4757 does not lookup the specified DWO file.
4758 This cannot be used to read DWO files.
4760 THIS_CU->cu is always freed when done.
4761 This is done in order to not leave THIS_CU->cu in a state where we have
4762 to care whether it refers to the "main" CU or the DWO CU.
4763 We can revisit this if the data shows there's a performance issue. */
4766 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4767 die_reader_func_ftype
*die_reader_func
,
4770 init_cutu_and_read_dies_no_follow (this_cu
,
4771 get_abbrev_section_for_cu (this_cu
),
4773 die_reader_func
, data
);
4776 /* Create a psymtab named NAME and assign it to PER_CU.
4778 The caller must fill in the following details:
4779 dirname, textlow, texthigh. */
4781 static struct partial_symtab
*
4782 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4784 struct objfile
*objfile
= per_cu
->objfile
;
4785 struct partial_symtab
*pst
;
4787 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4789 objfile
->global_psymbols
.next
,
4790 objfile
->static_psymbols
.next
);
4792 pst
->psymtabs_addrmap_supported
= 1;
4794 /* This is the glue that links PST into GDB's symbol API. */
4795 pst
->read_symtab_private
= per_cu
;
4796 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4797 per_cu
->v
.psymtab
= pst
;
4802 /* die_reader_func for process_psymtab_comp_unit. */
4805 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4807 struct die_info
*comp_unit_die
,
4811 struct dwarf2_cu
*cu
= reader
->cu
;
4812 struct objfile
*objfile
= cu
->objfile
;
4813 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4814 struct attribute
*attr
;
4816 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4817 struct partial_symtab
*pst
;
4819 const char *filename
;
4820 int *want_partial_unit_ptr
= data
;
4822 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4823 && (want_partial_unit_ptr
== NULL
4824 || !*want_partial_unit_ptr
))
4827 gdb_assert (! per_cu
->is_debug_types
);
4829 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4831 cu
->list_in_scope
= &file_symbols
;
4833 /* Allocate a new partial symbol table structure. */
4834 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4835 if (attr
== NULL
|| !DW_STRING (attr
))
4838 filename
= DW_STRING (attr
);
4840 pst
= create_partial_symtab (per_cu
, filename
);
4842 /* This must be done before calling dwarf2_build_include_psymtabs. */
4843 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4845 pst
->dirname
= DW_STRING (attr
);
4847 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4849 dwarf2_find_base_address (comp_unit_die
, cu
);
4851 /* Possibly set the default values of LOWPC and HIGHPC from
4853 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4854 &best_highpc
, cu
, pst
);
4855 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4856 /* Store the contiguous range if it is not empty; it can be empty for
4857 CUs with no code. */
4858 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4859 best_lowpc
+ baseaddr
,
4860 best_highpc
+ baseaddr
- 1, pst
);
4862 /* Check if comp unit has_children.
4863 If so, read the rest of the partial symbols from this comp unit.
4864 If not, there's no more debug_info for this comp unit. */
4867 struct partial_die_info
*first_die
;
4868 CORE_ADDR lowpc
, highpc
;
4870 lowpc
= ((CORE_ADDR
) -1);
4871 highpc
= ((CORE_ADDR
) 0);
4873 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4875 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4878 /* If we didn't find a lowpc, set it to highpc to avoid
4879 complaints from `maint check'. */
4880 if (lowpc
== ((CORE_ADDR
) -1))
4883 /* If the compilation unit didn't have an explicit address range,
4884 then use the information extracted from its child dies. */
4888 best_highpc
= highpc
;
4891 pst
->textlow
= best_lowpc
+ baseaddr
;
4892 pst
->texthigh
= best_highpc
+ baseaddr
;
4894 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4895 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4896 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4897 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4898 sort_pst_symbols (objfile
, pst
);
4900 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
))
4903 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4904 struct dwarf2_per_cu_data
*iter
;
4906 /* Fill in 'dependencies' here; we fill in 'users' in a
4908 pst
->number_of_dependencies
= len
;
4909 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4910 len
* sizeof (struct symtab
*));
4912 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
4915 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4917 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4920 /* Get the list of files included in the current compilation unit,
4921 and build a psymtab for each of them. */
4922 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4924 if (dwarf2_read_debug
)
4926 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4928 fprintf_unfiltered (gdb_stdlog
,
4929 "Psymtab for %s unit @0x%x: %s - %s"
4930 ", %d global, %d static syms\n",
4931 per_cu
->is_debug_types
? "type" : "comp",
4932 per_cu
->offset
.sect_off
,
4933 paddress (gdbarch
, pst
->textlow
),
4934 paddress (gdbarch
, pst
->texthigh
),
4935 pst
->n_global_syms
, pst
->n_static_syms
);
4939 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4940 Process compilation unit THIS_CU for a psymtab. */
4943 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4944 int want_partial_unit
)
4946 /* If this compilation unit was already read in, free the
4947 cached copy in order to read it in again. This is
4948 necessary because we skipped some symbols when we first
4949 read in the compilation unit (see load_partial_dies).
4950 This problem could be avoided, but the benefit is unclear. */
4951 if (this_cu
->cu
!= NULL
)
4952 free_one_cached_comp_unit (this_cu
);
4954 gdb_assert (! this_cu
->is_debug_types
);
4955 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
4956 process_psymtab_comp_unit_reader
,
4957 &want_partial_unit
);
4959 /* Age out any secondary CUs. */
4960 age_cached_comp_units ();
4964 hash_type_unit_group (const void *item
)
4966 const struct type_unit_group
*tu_group
= item
;
4968 return hash_stmt_list_entry (&tu_group
->hash
);
4972 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
4974 const struct type_unit_group
*lhs
= item_lhs
;
4975 const struct type_unit_group
*rhs
= item_rhs
;
4977 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
4980 /* Allocate a hash table for type unit groups. */
4983 allocate_type_unit_groups_table (void)
4985 return htab_create_alloc_ex (3,
4986 hash_type_unit_group
,
4989 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
4990 hashtab_obstack_allocate
,
4991 dummy_obstack_deallocate
);
4994 /* Type units that don't have DW_AT_stmt_list are grouped into their own
4995 partial symtabs. We combine several TUs per psymtab to not let the size
4996 of any one psymtab grow too big. */
4997 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
4998 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5000 /* Helper routine for get_type_unit_group.
5001 Create the type_unit_group object used to hold one or more TUs. */
5003 static struct type_unit_group
*
5004 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5006 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5007 struct dwarf2_per_cu_data
*per_cu
;
5008 struct type_unit_group
*tu_group
;
5010 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5011 struct type_unit_group
);
5012 per_cu
= &tu_group
->per_cu
;
5013 per_cu
->objfile
= objfile
;
5014 per_cu
->is_debug_types
= 1;
5015 per_cu
->s
.type_unit_group
= tu_group
;
5017 if (dwarf2_per_objfile
->using_index
)
5019 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5020 struct dwarf2_per_cu_quick_data
);
5021 tu_group
->t
.first_tu
= cu
->per_cu
;
5025 unsigned int line_offset
= line_offset_struct
.sect_off
;
5026 struct partial_symtab
*pst
;
5029 /* Give the symtab a useful name for debug purposes. */
5030 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5031 name
= xstrprintf ("<type_units_%d>",
5032 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5034 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5036 pst
= create_partial_symtab (per_cu
, name
);
5042 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5043 tu_group
->hash
.line_offset
= line_offset_struct
;
5048 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5049 STMT_LIST is a DW_AT_stmt_list attribute. */
5051 static struct type_unit_group
*
5052 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
5054 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5055 struct type_unit_group
*tu_group
;
5057 unsigned int line_offset
;
5058 struct type_unit_group type_unit_group_for_lookup
;
5060 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5062 dwarf2_per_objfile
->type_unit_groups
=
5063 allocate_type_unit_groups_table ();
5066 /* Do we need to create a new group, or can we use an existing one? */
5070 line_offset
= DW_UNSND (stmt_list
);
5071 ++tu_stats
->nr_symtab_sharers
;
5075 /* Ugh, no stmt_list. Rare, but we have to handle it.
5076 We can do various things here like create one group per TU or
5077 spread them over multiple groups to split up the expansion work.
5078 To avoid worst case scenarios (too many groups or too large groups)
5079 we, umm, group them in bunches. */
5080 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5081 | (tu_stats
->nr_stmt_less_type_units
5082 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5083 ++tu_stats
->nr_stmt_less_type_units
;
5086 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5087 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5088 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5089 &type_unit_group_for_lookup
, INSERT
);
5093 gdb_assert (tu_group
!= NULL
);
5097 sect_offset line_offset_struct
;
5099 line_offset_struct
.sect_off
= line_offset
;
5100 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5102 ++tu_stats
->nr_symtabs
;
5108 /* Struct used to sort TUs by their abbreviation table offset. */
5110 struct tu_abbrev_offset
5112 struct signatured_type
*sig_type
;
5113 sect_offset abbrev_offset
;
5116 /* Helper routine for build_type_unit_groups, passed to qsort. */
5119 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5121 const struct tu_abbrev_offset
* const *a
= ap
;
5122 const struct tu_abbrev_offset
* const *b
= bp
;
5123 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5124 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5126 return (aoff
> boff
) - (aoff
< boff
);
5129 /* A helper function to add a type_unit_group to a table. */
5132 add_type_unit_group_to_table (void **slot
, void *datum
)
5134 struct type_unit_group
*tu_group
= *slot
;
5135 struct type_unit_group
***datap
= datum
;
5143 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5144 each one passing FUNC,DATA.
5146 The efficiency is because we sort TUs by the abbrev table they use and
5147 only read each abbrev table once. In one program there are 200K TUs
5148 sharing 8K abbrev tables.
5150 The main purpose of this function is to support building the
5151 dwarf2_per_objfile->type_unit_groups table.
5152 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5153 can collapse the search space by grouping them by stmt_list.
5154 The savings can be significant, in the same program from above the 200K TUs
5155 share 8K stmt_list tables.
5157 FUNC is expected to call get_type_unit_group, which will create the
5158 struct type_unit_group if necessary and add it to
5159 dwarf2_per_objfile->type_unit_groups. */
5162 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5164 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5165 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5166 struct cleanup
*cleanups
;
5167 struct abbrev_table
*abbrev_table
;
5168 sect_offset abbrev_offset
;
5169 struct tu_abbrev_offset
*sorted_by_abbrev
;
5170 struct type_unit_group
**iter
;
5173 /* It's up to the caller to not call us multiple times. */
5174 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5176 if (dwarf2_per_objfile
->n_type_units
== 0)
5179 /* TUs typically share abbrev tables, and there can be way more TUs than
5180 abbrev tables. Sort by abbrev table to reduce the number of times we
5181 read each abbrev table in.
5182 Alternatives are to punt or to maintain a cache of abbrev tables.
5183 This is simpler and efficient enough for now.
5185 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5186 symtab to use). Typically TUs with the same abbrev offset have the same
5187 stmt_list value too so in practice this should work well.
5189 The basic algorithm here is:
5191 sort TUs by abbrev table
5192 for each TU with same abbrev table:
5193 read abbrev table if first user
5194 read TU top level DIE
5195 [IWBN if DWO skeletons had DW_AT_stmt_list]
5198 if (dwarf2_read_debug
)
5199 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5201 /* Sort in a separate table to maintain the order of all_type_units
5202 for .gdb_index: TU indices directly index all_type_units. */
5203 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5204 dwarf2_per_objfile
->n_type_units
);
5205 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5207 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5209 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5210 sorted_by_abbrev
[i
].abbrev_offset
=
5211 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5212 sig_type
->per_cu
.offset
);
5214 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5215 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5216 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5218 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5219 called any number of times, so we don't reset tu_stats here. */
5221 abbrev_offset
.sect_off
= ~(unsigned) 0;
5222 abbrev_table
= NULL
;
5223 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5225 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5227 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5229 /* Switch to the next abbrev table if necessary. */
5230 if (abbrev_table
== NULL
5231 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5233 if (abbrev_table
!= NULL
)
5235 abbrev_table_free (abbrev_table
);
5236 /* Reset to NULL in case abbrev_table_read_table throws
5237 an error: abbrev_table_free_cleanup will get called. */
5238 abbrev_table
= NULL
;
5240 abbrev_offset
= tu
->abbrev_offset
;
5242 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5244 ++tu_stats
->nr_uniq_abbrev_tables
;
5247 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5251 /* Create a vector of pointers to primary type units to make it easy to
5252 iterate over them and CUs. See dw2_get_primary_cu. */
5253 dwarf2_per_objfile
->n_type_unit_groups
=
5254 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5255 dwarf2_per_objfile
->all_type_unit_groups
=
5256 obstack_alloc (&objfile
->objfile_obstack
,
5257 dwarf2_per_objfile
->n_type_unit_groups
5258 * sizeof (struct type_unit_group
*));
5259 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5260 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5261 add_type_unit_group_to_table
, &iter
);
5262 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5263 == dwarf2_per_objfile
->n_type_unit_groups
);
5265 do_cleanups (cleanups
);
5267 if (dwarf2_read_debug
)
5269 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5270 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5271 dwarf2_per_objfile
->n_type_units
);
5272 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5273 tu_stats
->nr_uniq_abbrev_tables
);
5274 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5275 tu_stats
->nr_symtabs
);
5276 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5277 tu_stats
->nr_symtab_sharers
);
5278 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5279 tu_stats
->nr_stmt_less_type_units
);
5283 /* Reader function for build_type_psymtabs. */
5286 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5288 struct die_info
*type_unit_die
,
5292 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5293 struct dwarf2_cu
*cu
= reader
->cu
;
5294 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5295 struct type_unit_group
*tu_group
;
5296 struct attribute
*attr
;
5297 struct partial_die_info
*first_die
;
5298 CORE_ADDR lowpc
, highpc
;
5299 struct partial_symtab
*pst
;
5301 gdb_assert (data
== NULL
);
5306 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5307 tu_group
= get_type_unit_group (cu
, attr
);
5309 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5311 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5312 cu
->list_in_scope
= &file_symbols
;
5313 pst
= create_partial_symtab (per_cu
, "");
5316 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5318 lowpc
= (CORE_ADDR
) -1;
5319 highpc
= (CORE_ADDR
) 0;
5320 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5322 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5323 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5324 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5325 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5326 sort_pst_symbols (objfile
, pst
);
5329 /* Traversal function for build_type_psymtabs. */
5332 build_type_psymtab_dependencies (void **slot
, void *info
)
5334 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5335 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5336 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5337 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5338 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5339 struct dwarf2_per_cu_data
*iter
;
5342 gdb_assert (len
> 0);
5344 pst
->number_of_dependencies
= len
;
5345 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5346 len
* sizeof (struct psymtab
*));
5348 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5351 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5352 iter
->s
.type_unit_group
= tu_group
;
5355 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5360 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5361 Build partial symbol tables for the .debug_types comp-units. */
5364 build_type_psymtabs (struct objfile
*objfile
)
5366 if (! create_all_type_units (objfile
))
5369 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5371 /* Now that all TUs have been processed we can fill in the dependencies. */
5372 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5373 build_type_psymtab_dependencies
, NULL
);
5376 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5379 psymtabs_addrmap_cleanup (void *o
)
5381 struct objfile
*objfile
= o
;
5383 objfile
->psymtabs_addrmap
= NULL
;
5386 /* Compute the 'user' field for each psymtab in OBJFILE. */
5389 set_partial_user (struct objfile
*objfile
)
5393 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5395 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5396 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5402 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5404 /* Set the 'user' field only if it is not already set. */
5405 if (pst
->dependencies
[j
]->user
== NULL
)
5406 pst
->dependencies
[j
]->user
= pst
;
5411 /* Build the partial symbol table by doing a quick pass through the
5412 .debug_info and .debug_abbrev sections. */
5415 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5417 struct cleanup
*back_to
, *addrmap_cleanup
;
5418 struct obstack temp_obstack
;
5421 if (dwarf2_read_debug
)
5423 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5427 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5429 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5431 /* Any cached compilation units will be linked by the per-objfile
5432 read_in_chain. Make sure to free them when we're done. */
5433 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5435 build_type_psymtabs (objfile
);
5437 create_all_comp_units (objfile
);
5439 /* Create a temporary address map on a temporary obstack. We later
5440 copy this to the final obstack. */
5441 obstack_init (&temp_obstack
);
5442 make_cleanup_obstack_free (&temp_obstack
);
5443 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5444 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5446 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5448 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5450 process_psymtab_comp_unit (per_cu
, 0);
5453 set_partial_user (objfile
);
5455 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5456 &objfile
->objfile_obstack
);
5457 discard_cleanups (addrmap_cleanup
);
5459 do_cleanups (back_to
);
5461 if (dwarf2_read_debug
)
5462 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5466 /* die_reader_func for load_partial_comp_unit. */
5469 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5471 struct die_info
*comp_unit_die
,
5475 struct dwarf2_cu
*cu
= reader
->cu
;
5477 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5479 /* Check if comp unit has_children.
5480 If so, read the rest of the partial symbols from this comp unit.
5481 If not, there's no more debug_info for this comp unit. */
5483 load_partial_dies (reader
, info_ptr
, 0);
5486 /* Load the partial DIEs for a secondary CU into memory.
5487 This is also used when rereading a primary CU with load_all_dies. */
5490 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5492 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5493 load_partial_comp_unit_reader
, NULL
);
5497 read_comp_units_from_section (struct objfile
*objfile
,
5498 struct dwarf2_section_info
*section
,
5499 unsigned int is_dwz
,
5502 struct dwarf2_per_cu_data
***all_comp_units
)
5505 bfd
*abfd
= section
->asection
->owner
;
5507 dwarf2_read_section (objfile
, section
);
5509 info_ptr
= section
->buffer
;
5511 while (info_ptr
< section
->buffer
+ section
->size
)
5513 unsigned int length
, initial_length_size
;
5514 struct dwarf2_per_cu_data
*this_cu
;
5517 offset
.sect_off
= info_ptr
- section
->buffer
;
5519 /* Read just enough information to find out where the next
5520 compilation unit is. */
5521 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5523 /* Save the compilation unit for later lookup. */
5524 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5525 sizeof (struct dwarf2_per_cu_data
));
5526 memset (this_cu
, 0, sizeof (*this_cu
));
5527 this_cu
->offset
= offset
;
5528 this_cu
->length
= length
+ initial_length_size
;
5529 this_cu
->is_dwz
= is_dwz
;
5530 this_cu
->objfile
= objfile
;
5531 this_cu
->info_or_types_section
= section
;
5533 if (*n_comp_units
== *n_allocated
)
5536 *all_comp_units
= xrealloc (*all_comp_units
,
5538 * sizeof (struct dwarf2_per_cu_data
*));
5540 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5543 info_ptr
= info_ptr
+ this_cu
->length
;
5547 /* Create a list of all compilation units in OBJFILE.
5548 This is only done for -readnow and building partial symtabs. */
5551 create_all_comp_units (struct objfile
*objfile
)
5555 struct dwarf2_per_cu_data
**all_comp_units
;
5559 all_comp_units
= xmalloc (n_allocated
5560 * sizeof (struct dwarf2_per_cu_data
*));
5562 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5563 &n_allocated
, &n_comp_units
, &all_comp_units
);
5565 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5567 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5569 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5570 &n_allocated
, &n_comp_units
,
5574 dwarf2_per_objfile
->all_comp_units
5575 = obstack_alloc (&objfile
->objfile_obstack
,
5576 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5577 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5578 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5579 xfree (all_comp_units
);
5580 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5583 /* Process all loaded DIEs for compilation unit CU, starting at
5584 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5585 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5586 DW_AT_ranges). If NEED_PC is set, then this function will set
5587 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5588 and record the covered ranges in the addrmap. */
5591 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5592 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5594 struct partial_die_info
*pdi
;
5596 /* Now, march along the PDI's, descending into ones which have
5597 interesting children but skipping the children of the other ones,
5598 until we reach the end of the compilation unit. */
5604 fixup_partial_die (pdi
, cu
);
5606 /* Anonymous namespaces or modules have no name but have interesting
5607 children, so we need to look at them. Ditto for anonymous
5610 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5611 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5612 || pdi
->tag
== DW_TAG_imported_unit
)
5616 case DW_TAG_subprogram
:
5617 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5619 case DW_TAG_constant
:
5620 case DW_TAG_variable
:
5621 case DW_TAG_typedef
:
5622 case DW_TAG_union_type
:
5623 if (!pdi
->is_declaration
)
5625 add_partial_symbol (pdi
, cu
);
5628 case DW_TAG_class_type
:
5629 case DW_TAG_interface_type
:
5630 case DW_TAG_structure_type
:
5631 if (!pdi
->is_declaration
)
5633 add_partial_symbol (pdi
, cu
);
5636 case DW_TAG_enumeration_type
:
5637 if (!pdi
->is_declaration
)
5638 add_partial_enumeration (pdi
, cu
);
5640 case DW_TAG_base_type
:
5641 case DW_TAG_subrange_type
:
5642 /* File scope base type definitions are added to the partial
5644 add_partial_symbol (pdi
, cu
);
5646 case DW_TAG_namespace
:
5647 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5650 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5652 case DW_TAG_imported_unit
:
5654 struct dwarf2_per_cu_data
*per_cu
;
5656 /* For now we don't handle imported units in type units. */
5657 if (cu
->per_cu
->is_debug_types
)
5659 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5660 " supported in type units [in module %s]"),
5664 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5668 /* Go read the partial unit, if needed. */
5669 if (per_cu
->v
.psymtab
== NULL
)
5670 process_psymtab_comp_unit (per_cu
, 1);
5672 VEC_safe_push (dwarf2_per_cu_ptr
,
5673 cu
->per_cu
->s
.imported_symtabs
, per_cu
);
5681 /* If the die has a sibling, skip to the sibling. */
5683 pdi
= pdi
->die_sibling
;
5687 /* Functions used to compute the fully scoped name of a partial DIE.
5689 Normally, this is simple. For C++, the parent DIE's fully scoped
5690 name is concatenated with "::" and the partial DIE's name. For
5691 Java, the same thing occurs except that "." is used instead of "::".
5692 Enumerators are an exception; they use the scope of their parent
5693 enumeration type, i.e. the name of the enumeration type is not
5694 prepended to the enumerator.
5696 There are two complexities. One is DW_AT_specification; in this
5697 case "parent" means the parent of the target of the specification,
5698 instead of the direct parent of the DIE. The other is compilers
5699 which do not emit DW_TAG_namespace; in this case we try to guess
5700 the fully qualified name of structure types from their members'
5701 linkage names. This must be done using the DIE's children rather
5702 than the children of any DW_AT_specification target. We only need
5703 to do this for structures at the top level, i.e. if the target of
5704 any DW_AT_specification (if any; otherwise the DIE itself) does not
5707 /* Compute the scope prefix associated with PDI's parent, in
5708 compilation unit CU. The result will be allocated on CU's
5709 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5710 field. NULL is returned if no prefix is necessary. */
5712 partial_die_parent_scope (struct partial_die_info
*pdi
,
5713 struct dwarf2_cu
*cu
)
5715 char *grandparent_scope
;
5716 struct partial_die_info
*parent
, *real_pdi
;
5718 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5719 then this means the parent of the specification DIE. */
5722 while (real_pdi
->has_specification
)
5723 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5724 real_pdi
->spec_is_dwz
, cu
);
5726 parent
= real_pdi
->die_parent
;
5730 if (parent
->scope_set
)
5731 return parent
->scope
;
5733 fixup_partial_die (parent
, cu
);
5735 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5737 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5738 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5739 Work around this problem here. */
5740 if (cu
->language
== language_cplus
5741 && parent
->tag
== DW_TAG_namespace
5742 && strcmp (parent
->name
, "::") == 0
5743 && grandparent_scope
== NULL
)
5745 parent
->scope
= NULL
;
5746 parent
->scope_set
= 1;
5750 if (pdi
->tag
== DW_TAG_enumerator
)
5751 /* Enumerators should not get the name of the enumeration as a prefix. */
5752 parent
->scope
= grandparent_scope
;
5753 else if (parent
->tag
== DW_TAG_namespace
5754 || parent
->tag
== DW_TAG_module
5755 || parent
->tag
== DW_TAG_structure_type
5756 || parent
->tag
== DW_TAG_class_type
5757 || parent
->tag
== DW_TAG_interface_type
5758 || parent
->tag
== DW_TAG_union_type
5759 || parent
->tag
== DW_TAG_enumeration_type
)
5761 if (grandparent_scope
== NULL
)
5762 parent
->scope
= parent
->name
;
5764 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5766 parent
->name
, 0, cu
);
5770 /* FIXME drow/2004-04-01: What should we be doing with
5771 function-local names? For partial symbols, we should probably be
5773 complaint (&symfile_complaints
,
5774 _("unhandled containing DIE tag %d for DIE at %d"),
5775 parent
->tag
, pdi
->offset
.sect_off
);
5776 parent
->scope
= grandparent_scope
;
5779 parent
->scope_set
= 1;
5780 return parent
->scope
;
5783 /* Return the fully scoped name associated with PDI, from compilation unit
5784 CU. The result will be allocated with malloc. */
5787 partial_die_full_name (struct partial_die_info
*pdi
,
5788 struct dwarf2_cu
*cu
)
5792 /* If this is a template instantiation, we can not work out the
5793 template arguments from partial DIEs. So, unfortunately, we have
5794 to go through the full DIEs. At least any work we do building
5795 types here will be reused if full symbols are loaded later. */
5796 if (pdi
->has_template_arguments
)
5798 fixup_partial_die (pdi
, cu
);
5800 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5802 struct die_info
*die
;
5803 struct attribute attr
;
5804 struct dwarf2_cu
*ref_cu
= cu
;
5806 /* DW_FORM_ref_addr is using section offset. */
5808 attr
.form
= DW_FORM_ref_addr
;
5809 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5810 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5812 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5816 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5817 if (parent_scope
== NULL
)
5820 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5824 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5826 struct objfile
*objfile
= cu
->objfile
;
5828 char *actual_name
= NULL
;
5830 int built_actual_name
= 0;
5832 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5834 actual_name
= partial_die_full_name (pdi
, cu
);
5836 built_actual_name
= 1;
5838 if (actual_name
== NULL
)
5839 actual_name
= pdi
->name
;
5843 case DW_TAG_subprogram
:
5844 if (pdi
->is_external
|| cu
->language
== language_ada
)
5846 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5847 of the global scope. But in Ada, we want to be able to access
5848 nested procedures globally. So all Ada subprograms are stored
5849 in the global scope. */
5850 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5851 mst_text, objfile); */
5852 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5854 VAR_DOMAIN
, LOC_BLOCK
,
5855 &objfile
->global_psymbols
,
5856 0, pdi
->lowpc
+ baseaddr
,
5857 cu
->language
, objfile
);
5861 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5862 mst_file_text, objfile); */
5863 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5865 VAR_DOMAIN
, LOC_BLOCK
,
5866 &objfile
->static_psymbols
,
5867 0, pdi
->lowpc
+ baseaddr
,
5868 cu
->language
, objfile
);
5871 case DW_TAG_constant
:
5873 struct psymbol_allocation_list
*list
;
5875 if (pdi
->is_external
)
5876 list
= &objfile
->global_psymbols
;
5878 list
= &objfile
->static_psymbols
;
5879 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5880 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
5881 list
, 0, 0, cu
->language
, objfile
);
5884 case DW_TAG_variable
:
5886 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5890 && !dwarf2_per_objfile
->has_section_at_zero
)
5892 /* A global or static variable may also have been stripped
5893 out by the linker if unused, in which case its address
5894 will be nullified; do not add such variables into partial
5895 symbol table then. */
5897 else if (pdi
->is_external
)
5900 Don't enter into the minimal symbol tables as there is
5901 a minimal symbol table entry from the ELF symbols already.
5902 Enter into partial symbol table if it has a location
5903 descriptor or a type.
5904 If the location descriptor is missing, new_symbol will create
5905 a LOC_UNRESOLVED symbol, the address of the variable will then
5906 be determined from the minimal symbol table whenever the variable
5908 The address for the partial symbol table entry is not
5909 used by GDB, but it comes in handy for debugging partial symbol
5912 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5913 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5915 VAR_DOMAIN
, LOC_STATIC
,
5916 &objfile
->global_psymbols
,
5918 cu
->language
, objfile
);
5922 /* Static Variable. Skip symbols without location descriptors. */
5923 if (pdi
->d
.locdesc
== NULL
)
5925 if (built_actual_name
)
5926 xfree (actual_name
);
5929 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5930 mst_file_data, objfile); */
5931 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5933 VAR_DOMAIN
, LOC_STATIC
,
5934 &objfile
->static_psymbols
,
5936 cu
->language
, objfile
);
5939 case DW_TAG_typedef
:
5940 case DW_TAG_base_type
:
5941 case DW_TAG_subrange_type
:
5942 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5944 VAR_DOMAIN
, LOC_TYPEDEF
,
5945 &objfile
->static_psymbols
,
5946 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5948 case DW_TAG_namespace
:
5949 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5951 VAR_DOMAIN
, LOC_TYPEDEF
,
5952 &objfile
->global_psymbols
,
5953 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5955 case DW_TAG_class_type
:
5956 case DW_TAG_interface_type
:
5957 case DW_TAG_structure_type
:
5958 case DW_TAG_union_type
:
5959 case DW_TAG_enumeration_type
:
5960 /* Skip external references. The DWARF standard says in the section
5961 about "Structure, Union, and Class Type Entries": "An incomplete
5962 structure, union or class type is represented by a structure,
5963 union or class entry that does not have a byte size attribute
5964 and that has a DW_AT_declaration attribute." */
5965 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
5967 if (built_actual_name
)
5968 xfree (actual_name
);
5972 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
5973 static vs. global. */
5974 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5976 STRUCT_DOMAIN
, LOC_TYPEDEF
,
5977 (cu
->language
== language_cplus
5978 || cu
->language
== language_java
)
5979 ? &objfile
->global_psymbols
5980 : &objfile
->static_psymbols
,
5981 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5984 case DW_TAG_enumerator
:
5985 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5987 VAR_DOMAIN
, LOC_CONST
,
5988 (cu
->language
== language_cplus
5989 || cu
->language
== language_java
)
5990 ? &objfile
->global_psymbols
5991 : &objfile
->static_psymbols
,
5992 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5998 if (built_actual_name
)
5999 xfree (actual_name
);
6002 /* Read a partial die corresponding to a namespace; also, add a symbol
6003 corresponding to that namespace to the symbol table. NAMESPACE is
6004 the name of the enclosing namespace. */
6007 add_partial_namespace (struct partial_die_info
*pdi
,
6008 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6009 int need_pc
, struct dwarf2_cu
*cu
)
6011 /* Add a symbol for the namespace. */
6013 add_partial_symbol (pdi
, cu
);
6015 /* Now scan partial symbols in that namespace. */
6017 if (pdi
->has_children
)
6018 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6021 /* Read a partial die corresponding to a Fortran module. */
6024 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6025 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6027 /* Now scan partial symbols in that module. */
6029 if (pdi
->has_children
)
6030 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6033 /* Read a partial die corresponding to a subprogram and create a partial
6034 symbol for that subprogram. When the CU language allows it, this
6035 routine also defines a partial symbol for each nested subprogram
6036 that this subprogram contains.
6038 DIE my also be a lexical block, in which case we simply search
6039 recursively for suprograms defined inside that lexical block.
6040 Again, this is only performed when the CU language allows this
6041 type of definitions. */
6044 add_partial_subprogram (struct partial_die_info
*pdi
,
6045 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6046 int need_pc
, struct dwarf2_cu
*cu
)
6048 if (pdi
->tag
== DW_TAG_subprogram
)
6050 if (pdi
->has_pc_info
)
6052 if (pdi
->lowpc
< *lowpc
)
6053 *lowpc
= pdi
->lowpc
;
6054 if (pdi
->highpc
> *highpc
)
6055 *highpc
= pdi
->highpc
;
6059 struct objfile
*objfile
= cu
->objfile
;
6061 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6062 SECT_OFF_TEXT (objfile
));
6063 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6064 pdi
->lowpc
+ baseaddr
,
6065 pdi
->highpc
- 1 + baseaddr
,
6066 cu
->per_cu
->v
.psymtab
);
6070 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6072 if (!pdi
->is_declaration
)
6073 /* Ignore subprogram DIEs that do not have a name, they are
6074 illegal. Do not emit a complaint at this point, we will
6075 do so when we convert this psymtab into a symtab. */
6077 add_partial_symbol (pdi
, cu
);
6081 if (! pdi
->has_children
)
6084 if (cu
->language
== language_ada
)
6086 pdi
= pdi
->die_child
;
6089 fixup_partial_die (pdi
, cu
);
6090 if (pdi
->tag
== DW_TAG_subprogram
6091 || pdi
->tag
== DW_TAG_lexical_block
)
6092 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6093 pdi
= pdi
->die_sibling
;
6098 /* Read a partial die corresponding to an enumeration type. */
6101 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6102 struct dwarf2_cu
*cu
)
6104 struct partial_die_info
*pdi
;
6106 if (enum_pdi
->name
!= NULL
)
6107 add_partial_symbol (enum_pdi
, cu
);
6109 pdi
= enum_pdi
->die_child
;
6112 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6113 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6115 add_partial_symbol (pdi
, cu
);
6116 pdi
= pdi
->die_sibling
;
6120 /* Return the initial uleb128 in the die at INFO_PTR. */
6123 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6125 unsigned int bytes_read
;
6127 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6130 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6131 Return the corresponding abbrev, or NULL if the number is zero (indicating
6132 an empty DIE). In either case *BYTES_READ will be set to the length of
6133 the initial number. */
6135 static struct abbrev_info
*
6136 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6137 struct dwarf2_cu
*cu
)
6139 bfd
*abfd
= cu
->objfile
->obfd
;
6140 unsigned int abbrev_number
;
6141 struct abbrev_info
*abbrev
;
6143 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6145 if (abbrev_number
== 0)
6148 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6151 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6152 abbrev_number
, bfd_get_filename (abfd
));
6158 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6159 Returns a pointer to the end of a series of DIEs, terminated by an empty
6160 DIE. Any children of the skipped DIEs will also be skipped. */
6163 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6165 struct dwarf2_cu
*cu
= reader
->cu
;
6166 struct abbrev_info
*abbrev
;
6167 unsigned int bytes_read
;
6171 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6173 return info_ptr
+ bytes_read
;
6175 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6179 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6180 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6181 abbrev corresponding to that skipped uleb128 should be passed in
6182 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6186 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6187 struct abbrev_info
*abbrev
)
6189 unsigned int bytes_read
;
6190 struct attribute attr
;
6191 bfd
*abfd
= reader
->abfd
;
6192 struct dwarf2_cu
*cu
= reader
->cu
;
6193 gdb_byte
*buffer
= reader
->buffer
;
6194 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6195 gdb_byte
*start_info_ptr
= info_ptr
;
6196 unsigned int form
, i
;
6198 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6200 /* The only abbrev we care about is DW_AT_sibling. */
6201 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6203 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6204 if (attr
.form
== DW_FORM_ref_addr
)
6205 complaint (&symfile_complaints
,
6206 _("ignoring absolute DW_AT_sibling"));
6208 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6211 /* If it isn't DW_AT_sibling, skip this attribute. */
6212 form
= abbrev
->attrs
[i
].form
;
6216 case DW_FORM_ref_addr
:
6217 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6218 and later it is offset sized. */
6219 if (cu
->header
.version
== 2)
6220 info_ptr
+= cu
->header
.addr_size
;
6222 info_ptr
+= cu
->header
.offset_size
;
6224 case DW_FORM_GNU_ref_alt
:
6225 info_ptr
+= cu
->header
.offset_size
;
6228 info_ptr
+= cu
->header
.addr_size
;
6235 case DW_FORM_flag_present
:
6247 case DW_FORM_ref_sig8
:
6250 case DW_FORM_string
:
6251 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6252 info_ptr
+= bytes_read
;
6254 case DW_FORM_sec_offset
:
6256 case DW_FORM_GNU_strp_alt
:
6257 info_ptr
+= cu
->header
.offset_size
;
6259 case DW_FORM_exprloc
:
6261 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6262 info_ptr
+= bytes_read
;
6264 case DW_FORM_block1
:
6265 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6267 case DW_FORM_block2
:
6268 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6270 case DW_FORM_block4
:
6271 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6275 case DW_FORM_ref_udata
:
6276 case DW_FORM_GNU_addr_index
:
6277 case DW_FORM_GNU_str_index
:
6278 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6280 case DW_FORM_indirect
:
6281 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6282 info_ptr
+= bytes_read
;
6283 /* We need to continue parsing from here, so just go back to
6285 goto skip_attribute
;
6288 error (_("Dwarf Error: Cannot handle %s "
6289 "in DWARF reader [in module %s]"),
6290 dwarf_form_name (form
),
6291 bfd_get_filename (abfd
));
6295 if (abbrev
->has_children
)
6296 return skip_children (reader
, info_ptr
);
6301 /* Locate ORIG_PDI's sibling.
6302 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6305 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6306 struct partial_die_info
*orig_pdi
,
6309 /* Do we know the sibling already? */
6311 if (orig_pdi
->sibling
)
6312 return orig_pdi
->sibling
;
6314 /* Are there any children to deal with? */
6316 if (!orig_pdi
->has_children
)
6319 /* Skip the children the long way. */
6321 return skip_children (reader
, info_ptr
);
6324 /* Expand this partial symbol table into a full symbol table. */
6327 dwarf2_psymtab_to_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
6333 warning (_("bug: psymtab for %s is already read in."),
6340 printf_filtered (_("Reading in symbols for %s..."),
6342 gdb_flush (gdb_stdout
);
6345 /* Restore our global data. */
6346 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
6348 /* If this psymtab is constructed from a debug-only objfile, the
6349 has_section_at_zero flag will not necessarily be correct. We
6350 can get the correct value for this flag by looking at the data
6351 associated with the (presumably stripped) associated objfile. */
6352 if (objfile
->separate_debug_objfile_backlink
)
6354 struct dwarf2_per_objfile
*dpo_backlink
6355 = objfile_data (objfile
->separate_debug_objfile_backlink
,
6356 dwarf2_objfile_data_key
);
6358 dwarf2_per_objfile
->has_section_at_zero
6359 = dpo_backlink
->has_section_at_zero
;
6362 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6364 psymtab_to_symtab_1 (pst
);
6366 /* Finish up the debug error message. */
6368 printf_filtered (_("done.\n"));
6372 process_cu_includes ();
6375 /* Reading in full CUs. */
6377 /* Add PER_CU to the queue. */
6380 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6381 enum language pretend_language
)
6383 struct dwarf2_queue_item
*item
;
6386 item
= xmalloc (sizeof (*item
));
6387 item
->per_cu
= per_cu
;
6388 item
->pretend_language
= pretend_language
;
6391 if (dwarf2_queue
== NULL
)
6392 dwarf2_queue
= item
;
6394 dwarf2_queue_tail
->next
= item
;
6396 dwarf2_queue_tail
= item
;
6399 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6400 unit and add it to our queue.
6401 The result is non-zero if PER_CU was queued, otherwise the result is zero
6402 meaning either PER_CU is already queued or it is already loaded. */
6405 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6406 struct dwarf2_per_cu_data
*per_cu
,
6407 enum language pretend_language
)
6409 /* We may arrive here during partial symbol reading, if we need full
6410 DIEs to process an unusual case (e.g. template arguments). Do
6411 not queue PER_CU, just tell our caller to load its DIEs. */
6412 if (dwarf2_per_objfile
->reading_partial_symbols
)
6414 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6419 /* Mark the dependence relation so that we don't flush PER_CU
6421 dwarf2_add_dependence (this_cu
, per_cu
);
6423 /* If it's already on the queue, we have nothing to do. */
6427 /* If the compilation unit is already loaded, just mark it as
6429 if (per_cu
->cu
!= NULL
)
6431 per_cu
->cu
->last_used
= 0;
6435 /* Add it to the queue. */
6436 queue_comp_unit (per_cu
, pretend_language
);
6441 /* Process the queue. */
6444 process_queue (void)
6446 struct dwarf2_queue_item
*item
, *next_item
;
6448 if (dwarf2_read_debug
)
6450 fprintf_unfiltered (gdb_stdlog
,
6451 "Expanding one or more symtabs of objfile %s ...\n",
6452 dwarf2_per_objfile
->objfile
->name
);
6455 /* The queue starts out with one item, but following a DIE reference
6456 may load a new CU, adding it to the end of the queue. */
6457 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6459 if (dwarf2_per_objfile
->using_index
6460 ? !item
->per_cu
->v
.quick
->symtab
6461 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6463 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6465 if (dwarf2_read_debug
)
6467 fprintf_unfiltered (gdb_stdlog
,
6468 "Expanding symtab of %s at offset 0x%x\n",
6469 per_cu
->is_debug_types
? "TU" : "CU",
6470 per_cu
->offset
.sect_off
);
6473 if (per_cu
->is_debug_types
)
6474 process_full_type_unit (per_cu
, item
->pretend_language
);
6476 process_full_comp_unit (per_cu
, item
->pretend_language
);
6478 if (dwarf2_read_debug
)
6480 fprintf_unfiltered (gdb_stdlog
,
6481 "Done expanding %s at offset 0x%x\n",
6482 per_cu
->is_debug_types
? "TU" : "CU",
6483 per_cu
->offset
.sect_off
);
6487 item
->per_cu
->queued
= 0;
6488 next_item
= item
->next
;
6492 dwarf2_queue_tail
= NULL
;
6494 if (dwarf2_read_debug
)
6496 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6497 dwarf2_per_objfile
->objfile
->name
);
6501 /* Free all allocated queue entries. This function only releases anything if
6502 an error was thrown; if the queue was processed then it would have been
6503 freed as we went along. */
6506 dwarf2_release_queue (void *dummy
)
6508 struct dwarf2_queue_item
*item
, *last
;
6510 item
= dwarf2_queue
;
6513 /* Anything still marked queued is likely to be in an
6514 inconsistent state, so discard it. */
6515 if (item
->per_cu
->queued
)
6517 if (item
->per_cu
->cu
!= NULL
)
6518 free_one_cached_comp_unit (item
->per_cu
);
6519 item
->per_cu
->queued
= 0;
6527 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6530 /* Read in full symbols for PST, and anything it depends on. */
6533 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6535 struct dwarf2_per_cu_data
*per_cu
;
6541 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6542 if (!pst
->dependencies
[i
]->readin
6543 && pst
->dependencies
[i
]->user
== NULL
)
6545 /* Inform about additional files that need to be read in. */
6548 /* FIXME: i18n: Need to make this a single string. */
6549 fputs_filtered (" ", gdb_stdout
);
6551 fputs_filtered ("and ", gdb_stdout
);
6553 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6554 wrap_here (""); /* Flush output. */
6555 gdb_flush (gdb_stdout
);
6557 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6560 per_cu
= pst
->read_symtab_private
;
6564 /* It's an include file, no symbols to read for it.
6565 Everything is in the parent symtab. */
6570 dw2_do_instantiate_symtab (per_cu
);
6573 /* Trivial hash function for die_info: the hash value of a DIE
6574 is its offset in .debug_info for this objfile. */
6577 die_hash (const void *item
)
6579 const struct die_info
*die
= item
;
6581 return die
->offset
.sect_off
;
6584 /* Trivial comparison function for die_info structures: two DIEs
6585 are equal if they have the same offset. */
6588 die_eq (const void *item_lhs
, const void *item_rhs
)
6590 const struct die_info
*die_lhs
= item_lhs
;
6591 const struct die_info
*die_rhs
= item_rhs
;
6593 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6596 /* die_reader_func for load_full_comp_unit.
6597 This is identical to read_signatured_type_reader,
6598 but is kept separate for now. */
6601 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6603 struct die_info
*comp_unit_die
,
6607 struct dwarf2_cu
*cu
= reader
->cu
;
6608 enum language
*language_ptr
= data
;
6610 gdb_assert (cu
->die_hash
== NULL
);
6612 htab_create_alloc_ex (cu
->header
.length
/ 12,
6616 &cu
->comp_unit_obstack
,
6617 hashtab_obstack_allocate
,
6618 dummy_obstack_deallocate
);
6621 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6622 &info_ptr
, comp_unit_die
);
6623 cu
->dies
= comp_unit_die
;
6624 /* comp_unit_die is not stored in die_hash, no need. */
6626 /* We try not to read any attributes in this function, because not
6627 all CUs needed for references have been loaded yet, and symbol
6628 table processing isn't initialized. But we have to set the CU language,
6629 or we won't be able to build types correctly.
6630 Similarly, if we do not read the producer, we can not apply
6631 producer-specific interpretation. */
6632 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6635 /* Load the DIEs associated with PER_CU into memory. */
6638 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6639 enum language pretend_language
)
6641 gdb_assert (! this_cu
->is_debug_types
);
6643 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6644 load_full_comp_unit_reader
, &pretend_language
);
6647 /* Add a DIE to the delayed physname list. */
6650 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6651 const char *name
, struct die_info
*die
,
6652 struct dwarf2_cu
*cu
)
6654 struct delayed_method_info mi
;
6656 mi
.fnfield_index
= fnfield_index
;
6660 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6663 /* A cleanup for freeing the delayed method list. */
6666 free_delayed_list (void *ptr
)
6668 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6669 if (cu
->method_list
!= NULL
)
6671 VEC_free (delayed_method_info
, cu
->method_list
);
6672 cu
->method_list
= NULL
;
6676 /* Compute the physnames of any methods on the CU's method list.
6678 The computation of method physnames is delayed in order to avoid the
6679 (bad) condition that one of the method's formal parameters is of an as yet
6683 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6686 struct delayed_method_info
*mi
;
6687 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6689 const char *physname
;
6690 struct fn_fieldlist
*fn_flp
6691 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6692 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
6693 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6697 /* Go objects should be embedded in a DW_TAG_module DIE,
6698 and it's not clear if/how imported objects will appear.
6699 To keep Go support simple until that's worked out,
6700 go back through what we've read and create something usable.
6701 We could do this while processing each DIE, and feels kinda cleaner,
6702 but that way is more invasive.
6703 This is to, for example, allow the user to type "p var" or "b main"
6704 without having to specify the package name, and allow lookups
6705 of module.object to work in contexts that use the expression
6709 fixup_go_packaging (struct dwarf2_cu
*cu
)
6711 char *package_name
= NULL
;
6712 struct pending
*list
;
6715 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6717 for (i
= 0; i
< list
->nsyms
; ++i
)
6719 struct symbol
*sym
= list
->symbol
[i
];
6721 if (SYMBOL_LANGUAGE (sym
) == language_go
6722 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6724 char *this_package_name
= go_symbol_package_name (sym
);
6726 if (this_package_name
== NULL
)
6728 if (package_name
== NULL
)
6729 package_name
= this_package_name
;
6732 if (strcmp (package_name
, this_package_name
) != 0)
6733 complaint (&symfile_complaints
,
6734 _("Symtab %s has objects from two different Go packages: %s and %s"),
6735 (SYMBOL_SYMTAB (sym
)
6736 && SYMBOL_SYMTAB (sym
)->filename
6737 ? SYMBOL_SYMTAB (sym
)->filename
6738 : cu
->objfile
->name
),
6739 this_package_name
, package_name
);
6740 xfree (this_package_name
);
6746 if (package_name
!= NULL
)
6748 struct objfile
*objfile
= cu
->objfile
;
6749 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6750 package_name
, objfile
);
6753 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6755 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6756 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6757 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
6758 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6759 e.g., "main" finds the "main" module and not C's main(). */
6760 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6761 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6762 SYMBOL_TYPE (sym
) = type
;
6764 add_symbol_to_list (sym
, &global_symbols
);
6766 xfree (package_name
);
6770 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6772 /* Return the symtab for PER_CU. This works properly regardless of
6773 whether we're using the index or psymtabs. */
6775 static struct symtab
*
6776 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6778 return (dwarf2_per_objfile
->using_index
6779 ? per_cu
->v
.quick
->symtab
6780 : per_cu
->v
.psymtab
->symtab
);
6783 /* A helper function for computing the list of all symbol tables
6784 included by PER_CU. */
6787 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6788 htab_t all_children
,
6789 struct dwarf2_per_cu_data
*per_cu
)
6793 struct dwarf2_per_cu_data
*iter
;
6795 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6798 /* This inclusion and its children have been processed. */
6803 /* Only add a CU if it has a symbol table. */
6804 if (get_symtab (per_cu
) != NULL
)
6805 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6808 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6810 recursively_compute_inclusions (result
, all_children
, iter
);
6813 /* Compute the symtab 'includes' fields for the symtab related to
6817 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6819 gdb_assert (! per_cu
->is_debug_types
);
6821 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6824 struct dwarf2_per_cu_data
*iter
;
6825 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6826 htab_t all_children
;
6827 struct symtab
*symtab
= get_symtab (per_cu
);
6829 /* If we don't have a symtab, we can just skip this case. */
6833 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6834 NULL
, xcalloc
, xfree
);
6837 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6840 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6842 /* Now we have a transitive closure of all the included CUs, so
6843 we can convert it to a list of symtabs. */
6844 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6846 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6847 (len
+ 1) * sizeof (struct symtab
*));
6849 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6851 symtab
->includes
[ix
] = get_symtab (iter
);
6852 symtab
->includes
[len
] = NULL
;
6854 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6855 htab_delete (all_children
);
6859 /* Compute the 'includes' field for the symtabs of all the CUs we just
6863 process_cu_includes (void)
6866 struct dwarf2_per_cu_data
*iter
;
6869 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6873 if (! iter
->is_debug_types
)
6874 compute_symtab_includes (iter
);
6877 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6880 /* Generate full symbol information for PER_CU, whose DIEs have
6881 already been loaded into memory. */
6884 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6885 enum language pretend_language
)
6887 struct dwarf2_cu
*cu
= per_cu
->cu
;
6888 struct objfile
*objfile
= per_cu
->objfile
;
6889 CORE_ADDR lowpc
, highpc
;
6890 struct symtab
*symtab
;
6891 struct cleanup
*back_to
, *delayed_list_cleanup
;
6893 struct block
*static_block
;
6895 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6898 back_to
= make_cleanup (really_free_pendings
, NULL
);
6899 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6901 cu
->list_in_scope
= &file_symbols
;
6903 cu
->language
= pretend_language
;
6904 cu
->language_defn
= language_def (cu
->language
);
6906 /* Do line number decoding in read_file_scope () */
6907 process_die (cu
->dies
, cu
);
6909 /* For now fudge the Go package. */
6910 if (cu
->language
== language_go
)
6911 fixup_go_packaging (cu
);
6913 /* Now that we have processed all the DIEs in the CU, all the types
6914 should be complete, and it should now be safe to compute all of the
6916 compute_delayed_physnames (cu
);
6917 do_cleanups (delayed_list_cleanup
);
6919 /* Some compilers don't define a DW_AT_high_pc attribute for the
6920 compilation unit. If the DW_AT_high_pc is missing, synthesize
6921 it, by scanning the DIE's below the compilation unit. */
6922 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6925 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
6926 per_cu
->s
.imported_symtabs
!= NULL
);
6928 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
6929 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
6930 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
6931 addrmap to help ensure it has an accurate map of pc values belonging to
6933 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
6935 symtab
= end_symtab_from_static_block (static_block
, objfile
,
6936 SECT_OFF_TEXT (objfile
), 0);
6940 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
6942 /* Set symtab language to language from DW_AT_language. If the
6943 compilation is from a C file generated by language preprocessors, do
6944 not set the language if it was already deduced by start_subfile. */
6945 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6946 symtab
->language
= cu
->language
;
6948 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6949 produce DW_AT_location with location lists but it can be possibly
6950 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6951 there were bugs in prologue debug info, fixed later in GCC-4.5
6952 by "unwind info for epilogues" patch (which is not directly related).
6954 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6955 needed, it would be wrong due to missing DW_AT_producer there.
6957 Still one can confuse GDB by using non-standard GCC compilation
6958 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6960 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
6961 symtab
->locations_valid
= 1;
6963 if (gcc_4_minor
>= 5)
6964 symtab
->epilogue_unwind_valid
= 1;
6966 symtab
->call_site_htab
= cu
->call_site_htab
;
6969 if (dwarf2_per_objfile
->using_index
)
6970 per_cu
->v
.quick
->symtab
= symtab
;
6973 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6974 pst
->symtab
= symtab
;
6978 /* Push it for inclusion processing later. */
6979 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
6981 do_cleanups (back_to
);
6984 /* Generate full symbol information for type unit PER_CU, whose DIEs have
6985 already been loaded into memory. */
6988 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
6989 enum language pretend_language
)
6991 struct dwarf2_cu
*cu
= per_cu
->cu
;
6992 struct objfile
*objfile
= per_cu
->objfile
;
6993 struct symtab
*symtab
;
6994 struct cleanup
*back_to
, *delayed_list_cleanup
;
6997 back_to
= make_cleanup (really_free_pendings
, NULL
);
6998 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7000 cu
->list_in_scope
= &file_symbols
;
7002 cu
->language
= pretend_language
;
7003 cu
->language_defn
= language_def (cu
->language
);
7005 /* The symbol tables are set up in read_type_unit_scope. */
7006 process_die (cu
->dies
, cu
);
7008 /* For now fudge the Go package. */
7009 if (cu
->language
== language_go
)
7010 fixup_go_packaging (cu
);
7012 /* Now that we have processed all the DIEs in the CU, all the types
7013 should be complete, and it should now be safe to compute all of the
7015 compute_delayed_physnames (cu
);
7016 do_cleanups (delayed_list_cleanup
);
7018 /* TUs share symbol tables.
7019 If this is the first TU to use this symtab, complete the construction
7020 of it with end_expandable_symtab. Otherwise, complete the addition of
7021 this TU's symbols to the existing symtab. */
7022 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
7024 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7025 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
7029 /* Set symtab language to language from DW_AT_language. If the
7030 compilation is from a C file generated by language preprocessors,
7031 do not set the language if it was already deduced by
7033 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7034 symtab
->language
= cu
->language
;
7039 augment_type_symtab (objfile
,
7040 per_cu
->s
.type_unit_group
->primary_symtab
);
7041 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
7044 if (dwarf2_per_objfile
->using_index
)
7045 per_cu
->v
.quick
->symtab
= symtab
;
7048 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7049 pst
->symtab
= symtab
;
7053 do_cleanups (back_to
);
7056 /* Process an imported unit DIE. */
7059 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7061 struct attribute
*attr
;
7063 /* For now we don't handle imported units in type units. */
7064 if (cu
->per_cu
->is_debug_types
)
7066 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7067 " supported in type units [in module %s]"),
7071 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7074 struct dwarf2_per_cu_data
*per_cu
;
7075 struct symtab
*imported_symtab
;
7079 offset
= dwarf2_get_ref_die_offset (attr
);
7080 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7081 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7083 /* Queue the unit, if needed. */
7084 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7085 load_full_comp_unit (per_cu
, cu
->language
);
7087 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
7092 /* Process a die and its children. */
7095 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7099 case DW_TAG_padding
:
7101 case DW_TAG_compile_unit
:
7102 case DW_TAG_partial_unit
:
7103 read_file_scope (die
, cu
);
7105 case DW_TAG_type_unit
:
7106 read_type_unit_scope (die
, cu
);
7108 case DW_TAG_subprogram
:
7109 case DW_TAG_inlined_subroutine
:
7110 read_func_scope (die
, cu
);
7112 case DW_TAG_lexical_block
:
7113 case DW_TAG_try_block
:
7114 case DW_TAG_catch_block
:
7115 read_lexical_block_scope (die
, cu
);
7117 case DW_TAG_GNU_call_site
:
7118 read_call_site_scope (die
, cu
);
7120 case DW_TAG_class_type
:
7121 case DW_TAG_interface_type
:
7122 case DW_TAG_structure_type
:
7123 case DW_TAG_union_type
:
7124 process_structure_scope (die
, cu
);
7126 case DW_TAG_enumeration_type
:
7127 process_enumeration_scope (die
, cu
);
7130 /* These dies have a type, but processing them does not create
7131 a symbol or recurse to process the children. Therefore we can
7132 read them on-demand through read_type_die. */
7133 case DW_TAG_subroutine_type
:
7134 case DW_TAG_set_type
:
7135 case DW_TAG_array_type
:
7136 case DW_TAG_pointer_type
:
7137 case DW_TAG_ptr_to_member_type
:
7138 case DW_TAG_reference_type
:
7139 case DW_TAG_string_type
:
7142 case DW_TAG_base_type
:
7143 case DW_TAG_subrange_type
:
7144 case DW_TAG_typedef
:
7145 /* Add a typedef symbol for the type definition, if it has a
7147 new_symbol (die
, read_type_die (die
, cu
), cu
);
7149 case DW_TAG_common_block
:
7150 read_common_block (die
, cu
);
7152 case DW_TAG_common_inclusion
:
7154 case DW_TAG_namespace
:
7155 processing_has_namespace_info
= 1;
7156 read_namespace (die
, cu
);
7159 processing_has_namespace_info
= 1;
7160 read_module (die
, cu
);
7162 case DW_TAG_imported_declaration
:
7163 case DW_TAG_imported_module
:
7164 processing_has_namespace_info
= 1;
7165 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7166 || cu
->language
!= language_fortran
))
7167 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7168 dwarf_tag_name (die
->tag
));
7169 read_import_statement (die
, cu
);
7172 case DW_TAG_imported_unit
:
7173 process_imported_unit_die (die
, cu
);
7177 new_symbol (die
, NULL
, cu
);
7182 /* A helper function for dwarf2_compute_name which determines whether DIE
7183 needs to have the name of the scope prepended to the name listed in the
7187 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7189 struct attribute
*attr
;
7193 case DW_TAG_namespace
:
7194 case DW_TAG_typedef
:
7195 case DW_TAG_class_type
:
7196 case DW_TAG_interface_type
:
7197 case DW_TAG_structure_type
:
7198 case DW_TAG_union_type
:
7199 case DW_TAG_enumeration_type
:
7200 case DW_TAG_enumerator
:
7201 case DW_TAG_subprogram
:
7205 case DW_TAG_variable
:
7206 case DW_TAG_constant
:
7207 /* We only need to prefix "globally" visible variables. These include
7208 any variable marked with DW_AT_external or any variable that
7209 lives in a namespace. [Variables in anonymous namespaces
7210 require prefixing, but they are not DW_AT_external.] */
7212 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7214 struct dwarf2_cu
*spec_cu
= cu
;
7216 return die_needs_namespace (die_specification (die
, &spec_cu
),
7220 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7221 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7222 && die
->parent
->tag
!= DW_TAG_module
)
7224 /* A variable in a lexical block of some kind does not need a
7225 namespace, even though in C++ such variables may be external
7226 and have a mangled name. */
7227 if (die
->parent
->tag
== DW_TAG_lexical_block
7228 || die
->parent
->tag
== DW_TAG_try_block
7229 || die
->parent
->tag
== DW_TAG_catch_block
7230 || die
->parent
->tag
== DW_TAG_subprogram
)
7239 /* Retrieve the last character from a mem_file. */
7242 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7244 char *last_char_p
= (char *) object
;
7247 *last_char_p
= buffer
[length
- 1];
7250 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7251 compute the physname for the object, which include a method's:
7252 - formal parameters (C++/Java),
7253 - receiver type (Go),
7254 - return type (Java).
7256 The term "physname" is a bit confusing.
7257 For C++, for example, it is the demangled name.
7258 For Go, for example, it's the mangled name.
7260 For Ada, return the DIE's linkage name rather than the fully qualified
7261 name. PHYSNAME is ignored..
7263 The result is allocated on the objfile_obstack and canonicalized. */
7266 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
7269 struct objfile
*objfile
= cu
->objfile
;
7272 name
= dwarf2_name (die
, cu
);
7274 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7275 compute it by typename_concat inside GDB. */
7276 if (cu
->language
== language_ada
7277 || (cu
->language
== language_fortran
&& physname
))
7279 /* For Ada unit, we prefer the linkage name over the name, as
7280 the former contains the exported name, which the user expects
7281 to be able to reference. Ideally, we want the user to be able
7282 to reference this entity using either natural or linkage name,
7283 but we haven't started looking at this enhancement yet. */
7284 struct attribute
*attr
;
7286 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7288 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7289 if (attr
&& DW_STRING (attr
))
7290 return DW_STRING (attr
);
7293 /* These are the only languages we know how to qualify names in. */
7295 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7296 || cu
->language
== language_fortran
))
7298 if (die_needs_namespace (die
, cu
))
7302 struct ui_file
*buf
;
7304 prefix
= determine_prefix (die
, cu
);
7305 buf
= mem_fileopen ();
7306 if (*prefix
!= '\0')
7308 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7311 fputs_unfiltered (prefixed_name
, buf
);
7312 xfree (prefixed_name
);
7315 fputs_unfiltered (name
, buf
);
7317 /* Template parameters may be specified in the DIE's DW_AT_name, or
7318 as children with DW_TAG_template_type_param or
7319 DW_TAG_value_type_param. If the latter, add them to the name
7320 here. If the name already has template parameters, then
7321 skip this step; some versions of GCC emit both, and
7322 it is more efficient to use the pre-computed name.
7324 Something to keep in mind about this process: it is very
7325 unlikely, or in some cases downright impossible, to produce
7326 something that will match the mangled name of a function.
7327 If the definition of the function has the same debug info,
7328 we should be able to match up with it anyway. But fallbacks
7329 using the minimal symbol, for instance to find a method
7330 implemented in a stripped copy of libstdc++, will not work.
7331 If we do not have debug info for the definition, we will have to
7332 match them up some other way.
7334 When we do name matching there is a related problem with function
7335 templates; two instantiated function templates are allowed to
7336 differ only by their return types, which we do not add here. */
7338 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7340 struct attribute
*attr
;
7341 struct die_info
*child
;
7344 die
->building_fullname
= 1;
7346 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7351 struct dwarf2_locexpr_baton
*baton
;
7354 if (child
->tag
!= DW_TAG_template_type_param
7355 && child
->tag
!= DW_TAG_template_value_param
)
7360 fputs_unfiltered ("<", buf
);
7364 fputs_unfiltered (", ", buf
);
7366 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7369 complaint (&symfile_complaints
,
7370 _("template parameter missing DW_AT_type"));
7371 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7374 type
= die_type (child
, cu
);
7376 if (child
->tag
== DW_TAG_template_type_param
)
7378 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7382 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7385 complaint (&symfile_complaints
,
7386 _("template parameter missing "
7387 "DW_AT_const_value"));
7388 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7392 dwarf2_const_value_attr (attr
, type
, name
,
7393 &cu
->comp_unit_obstack
, cu
,
7394 &value
, &bytes
, &baton
);
7396 if (TYPE_NOSIGN (type
))
7397 /* GDB prints characters as NUMBER 'CHAR'. If that's
7398 changed, this can use value_print instead. */
7399 c_printchar (value
, type
, buf
);
7402 struct value_print_options opts
;
7405 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7409 else if (bytes
!= NULL
)
7411 v
= allocate_value (type
);
7412 memcpy (value_contents_writeable (v
), bytes
,
7413 TYPE_LENGTH (type
));
7416 v
= value_from_longest (type
, value
);
7418 /* Specify decimal so that we do not depend on
7420 get_formatted_print_options (&opts
, 'd');
7422 value_print (v
, buf
, &opts
);
7428 die
->building_fullname
= 0;
7432 /* Close the argument list, with a space if necessary
7433 (nested templates). */
7434 char last_char
= '\0';
7435 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7436 if (last_char
== '>')
7437 fputs_unfiltered (" >", buf
);
7439 fputs_unfiltered (">", buf
);
7443 /* For Java and C++ methods, append formal parameter type
7444 information, if PHYSNAME. */
7446 if (physname
&& die
->tag
== DW_TAG_subprogram
7447 && (cu
->language
== language_cplus
7448 || cu
->language
== language_java
))
7450 struct type
*type
= read_type_die (die
, cu
);
7452 c_type_print_args (type
, buf
, 1, cu
->language
,
7453 &type_print_raw_options
);
7455 if (cu
->language
== language_java
)
7457 /* For java, we must append the return type to method
7459 if (die
->tag
== DW_TAG_subprogram
)
7460 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7461 0, 0, &type_print_raw_options
);
7463 else if (cu
->language
== language_cplus
)
7465 /* Assume that an artificial first parameter is
7466 "this", but do not crash if it is not. RealView
7467 marks unnamed (and thus unused) parameters as
7468 artificial; there is no way to differentiate
7470 if (TYPE_NFIELDS (type
) > 0
7471 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7472 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7473 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7475 fputs_unfiltered (" const", buf
);
7479 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7481 ui_file_delete (buf
);
7483 if (cu
->language
== language_cplus
)
7486 = dwarf2_canonicalize_name (name
, cu
,
7487 &objfile
->objfile_obstack
);
7498 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7499 If scope qualifiers are appropriate they will be added. The result
7500 will be allocated on the objfile_obstack, or NULL if the DIE does
7501 not have a name. NAME may either be from a previous call to
7502 dwarf2_name or NULL.
7504 The output string will be canonicalized (if C++/Java). */
7507 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7509 return dwarf2_compute_name (name
, die
, cu
, 0);
7512 /* Construct a physname for the given DIE in CU. NAME may either be
7513 from a previous call to dwarf2_name or NULL. The result will be
7514 allocated on the objfile_objstack or NULL if the DIE does not have a
7517 The output string will be canonicalized (if C++/Java). */
7520 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7522 struct objfile
*objfile
= cu
->objfile
;
7523 struct attribute
*attr
;
7524 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7525 struct cleanup
*back_to
;
7528 /* In this case dwarf2_compute_name is just a shortcut not building anything
7530 if (!die_needs_namespace (die
, cu
))
7531 return dwarf2_compute_name (name
, die
, cu
, 1);
7533 back_to
= make_cleanup (null_cleanup
, NULL
);
7535 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7537 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7539 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7541 if (attr
&& DW_STRING (attr
))
7545 mangled
= DW_STRING (attr
);
7547 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7548 type. It is easier for GDB users to search for such functions as
7549 `name(params)' than `long name(params)'. In such case the minimal
7550 symbol names do not match the full symbol names but for template
7551 functions there is never a need to look up their definition from their
7552 declaration so the only disadvantage remains the minimal symbol
7553 variant `long name(params)' does not have the proper inferior type.
7556 if (cu
->language
== language_go
)
7558 /* This is a lie, but we already lie to the caller new_symbol_full.
7559 new_symbol_full assumes we return the mangled name.
7560 This just undoes that lie until things are cleaned up. */
7565 demangled
= cplus_demangle (mangled
,
7566 (DMGL_PARAMS
| DMGL_ANSI
7567 | (cu
->language
== language_java
7568 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7573 make_cleanup (xfree
, demangled
);
7583 if (canon
== NULL
|| check_physname
)
7585 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7587 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7589 /* It may not mean a bug in GDB. The compiler could also
7590 compute DW_AT_linkage_name incorrectly. But in such case
7591 GDB would need to be bug-to-bug compatible. */
7593 complaint (&symfile_complaints
,
7594 _("Computed physname <%s> does not match demangled <%s> "
7595 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7596 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7598 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7599 is available here - over computed PHYSNAME. It is safer
7600 against both buggy GDB and buggy compilers. */
7614 retval
= obsavestring (retval
, strlen (retval
),
7615 &objfile
->objfile_obstack
);
7617 do_cleanups (back_to
);
7621 /* Read the import statement specified by the given die and record it. */
7624 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7626 struct objfile
*objfile
= cu
->objfile
;
7627 struct attribute
*import_attr
;
7628 struct die_info
*imported_die
, *child_die
;
7629 struct dwarf2_cu
*imported_cu
;
7630 const char *imported_name
;
7631 const char *imported_name_prefix
;
7632 const char *canonical_name
;
7633 const char *import_alias
;
7634 const char *imported_declaration
= NULL
;
7635 const char *import_prefix
;
7636 VEC (const_char_ptr
) *excludes
= NULL
;
7637 struct cleanup
*cleanups
;
7641 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7642 if (import_attr
== NULL
)
7644 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7645 dwarf_tag_name (die
->tag
));
7650 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7651 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7652 if (imported_name
== NULL
)
7654 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7656 The import in the following code:
7670 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7671 <52> DW_AT_decl_file : 1
7672 <53> DW_AT_decl_line : 6
7673 <54> DW_AT_import : <0x75>
7674 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7676 <5b> DW_AT_decl_file : 1
7677 <5c> DW_AT_decl_line : 2
7678 <5d> DW_AT_type : <0x6e>
7680 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7681 <76> DW_AT_byte_size : 4
7682 <77> DW_AT_encoding : 5 (signed)
7684 imports the wrong die ( 0x75 instead of 0x58 ).
7685 This case will be ignored until the gcc bug is fixed. */
7689 /* Figure out the local name after import. */
7690 import_alias
= dwarf2_name (die
, cu
);
7692 /* Figure out where the statement is being imported to. */
7693 import_prefix
= determine_prefix (die
, cu
);
7695 /* Figure out what the scope of the imported die is and prepend it
7696 to the name of the imported die. */
7697 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7699 if (imported_die
->tag
!= DW_TAG_namespace
7700 && imported_die
->tag
!= DW_TAG_module
)
7702 imported_declaration
= imported_name
;
7703 canonical_name
= imported_name_prefix
;
7705 else if (strlen (imported_name_prefix
) > 0)
7707 temp
= alloca (strlen (imported_name_prefix
)
7708 + 2 + strlen (imported_name
) + 1);
7709 strcpy (temp
, imported_name_prefix
);
7710 strcat (temp
, "::");
7711 strcat (temp
, imported_name
);
7712 canonical_name
= temp
;
7715 canonical_name
= imported_name
;
7717 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7719 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7720 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7721 child_die
= sibling_die (child_die
))
7723 /* DWARF-4: A Fortran use statement with a “rename list” may be
7724 represented by an imported module entry with an import attribute
7725 referring to the module and owned entries corresponding to those
7726 entities that are renamed as part of being imported. */
7728 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7730 complaint (&symfile_complaints
,
7731 _("child DW_TAG_imported_declaration expected "
7732 "- DIE at 0x%x [in module %s]"),
7733 child_die
->offset
.sect_off
, objfile
->name
);
7737 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7738 if (import_attr
== NULL
)
7740 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7741 dwarf_tag_name (child_die
->tag
));
7746 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7748 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7749 if (imported_name
== NULL
)
7751 complaint (&symfile_complaints
,
7752 _("child DW_TAG_imported_declaration has unknown "
7753 "imported name - DIE at 0x%x [in module %s]"),
7754 child_die
->offset
.sect_off
, objfile
->name
);
7758 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7760 process_die (child_die
, cu
);
7763 cp_add_using_directive (import_prefix
,
7766 imported_declaration
,
7768 &objfile
->objfile_obstack
);
7770 do_cleanups (cleanups
);
7773 /* Cleanup function for handle_DW_AT_stmt_list. */
7776 free_cu_line_header (void *arg
)
7778 struct dwarf2_cu
*cu
= arg
;
7780 free_line_header (cu
->line_header
);
7781 cu
->line_header
= NULL
;
7784 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7785 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7786 this, it was first present in GCC release 4.3.0. */
7789 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
7791 if (!cu
->checked_producer
)
7792 check_producer (cu
);
7794 return cu
->producer_is_gcc_lt_4_3
;
7798 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7799 char **name
, char **comp_dir
)
7801 struct attribute
*attr
;
7806 /* Find the filename. Do not use dwarf2_name here, since the filename
7807 is not a source language identifier. */
7808 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7811 *name
= DW_STRING (attr
);
7814 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7816 *comp_dir
= DW_STRING (attr
);
7817 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
7818 && IS_ABSOLUTE_PATH (*name
))
7820 *comp_dir
= ldirname (*name
);
7821 if (*comp_dir
!= NULL
)
7822 make_cleanup (xfree
, *comp_dir
);
7824 if (*comp_dir
!= NULL
)
7826 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7827 directory, get rid of it. */
7828 char *cp
= strchr (*comp_dir
, ':');
7830 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7835 *name
= "<unknown>";
7838 /* Handle DW_AT_stmt_list for a compilation unit.
7839 DIE is the DW_TAG_compile_unit die for CU.
7840 COMP_DIR is the compilation directory.
7841 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7844 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7845 const char *comp_dir
)
7847 struct attribute
*attr
;
7849 gdb_assert (! cu
->per_cu
->is_debug_types
);
7851 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7854 unsigned int line_offset
= DW_UNSND (attr
);
7855 struct line_header
*line_header
7856 = dwarf_decode_line_header (line_offset
, cu
);
7860 cu
->line_header
= line_header
;
7861 make_cleanup (free_cu_line_header
, cu
);
7862 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7867 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7870 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7872 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7873 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7874 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7875 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7876 struct attribute
*attr
;
7878 char *comp_dir
= NULL
;
7879 struct die_info
*child_die
;
7880 bfd
*abfd
= objfile
->obfd
;
7883 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7885 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7887 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7888 from finish_block. */
7889 if (lowpc
== ((CORE_ADDR
) -1))
7894 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7896 prepare_one_comp_unit (cu
, die
, cu
->language
);
7898 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7899 standardised yet. As a workaround for the language detection we fall
7900 back to the DW_AT_producer string. */
7901 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7902 cu
->language
= language_opencl
;
7904 /* Similar hack for Go. */
7905 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7906 set_cu_language (DW_LANG_Go
, cu
);
7908 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7910 /* Decode line number information if present. We do this before
7911 processing child DIEs, so that the line header table is available
7912 for DW_AT_decl_file. */
7913 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7915 /* Process all dies in compilation unit. */
7916 if (die
->child
!= NULL
)
7918 child_die
= die
->child
;
7919 while (child_die
&& child_die
->tag
)
7921 process_die (child_die
, cu
);
7922 child_die
= sibling_die (child_die
);
7926 /* Decode macro information, if present. Dwarf 2 macro information
7927 refers to information in the line number info statement program
7928 header, so we can only read it if we've read the header
7930 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7931 if (attr
&& cu
->line_header
)
7933 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7934 complaint (&symfile_complaints
,
7935 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7937 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
7941 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
7942 if (attr
&& cu
->line_header
)
7944 unsigned int macro_offset
= DW_UNSND (attr
);
7946 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
7950 do_cleanups (back_to
);
7953 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
7954 Create the set of symtabs used by this TU, or if this TU is sharing
7955 symtabs with another TU and the symtabs have already been created
7956 then restore those symtabs in the line header.
7957 We don't need the pc/line-number mapping for type units. */
7960 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
7962 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7963 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7964 struct type_unit_group
*tu_group
;
7966 struct line_header
*lh
;
7967 struct attribute
*attr
;
7968 unsigned int i
, line_offset
;
7970 gdb_assert (per_cu
->is_debug_types
);
7972 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7974 /* If we're using .gdb_index (includes -readnow) then
7975 per_cu->s.type_unit_group may not have been set up yet. */
7976 if (per_cu
->s
.type_unit_group
== NULL
)
7977 per_cu
->s
.type_unit_group
= get_type_unit_group (cu
, attr
);
7978 tu_group
= per_cu
->s
.type_unit_group
;
7980 /* If we've already processed this stmt_list there's no real need to
7981 do it again, we could fake it and just recreate the part we need
7982 (file name,index -> symtab mapping). If data shows this optimization
7983 is useful we can do it then. */
7984 first_time
= tu_group
->primary_symtab
== NULL
;
7986 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
7991 line_offset
= DW_UNSND (attr
);
7992 lh
= dwarf_decode_line_header (line_offset
, cu
);
7997 dwarf2_start_symtab (cu
, "", NULL
, 0);
8000 gdb_assert (tu_group
->symtabs
== NULL
);
8003 /* Note: The primary symtab will get allocated at the end. */
8007 cu
->line_header
= lh
;
8008 make_cleanup (free_cu_line_header
, cu
);
8012 dwarf2_start_symtab (cu
, "", NULL
, 0);
8014 tu_group
->num_symtabs
= lh
->num_file_names
;
8015 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8017 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8020 struct file_entry
*fe
= &lh
->file_names
[i
];
8023 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8024 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8026 /* Note: We don't have to watch for the main subfile here, type units
8027 don't have DW_AT_name. */
8029 if (current_subfile
->symtab
== NULL
)
8031 /* NOTE: start_subfile will recognize when it's been passed
8032 a file it has already seen. So we can't assume there's a
8033 simple mapping from lh->file_names to subfiles,
8034 lh->file_names may contain dups. */
8035 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8039 fe
->symtab
= current_subfile
->symtab
;
8040 tu_group
->symtabs
[i
] = fe
->symtab
;
8047 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8049 struct file_entry
*fe
= &lh
->file_names
[i
];
8051 fe
->symtab
= tu_group
->symtabs
[i
];
8055 /* The main symtab is allocated last. Type units don't have DW_AT_name
8056 so they don't have a "real" (so to speak) symtab anyway.
8057 There is later code that will assign the main symtab to all symbols
8058 that don't have one. We need to handle the case of a symbol with a
8059 missing symtab (DW_AT_decl_file) anyway. */
8062 /* Process DW_TAG_type_unit.
8063 For TUs we want to skip the first top level sibling if it's not the
8064 actual type being defined by this TU. In this case the first top
8065 level sibling is there to provide context only. */
8068 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8070 struct die_info
*child_die
;
8072 prepare_one_comp_unit (cu
, die
, language_minimal
);
8074 /* Initialize (or reinitialize) the machinery for building symtabs.
8075 We do this before processing child DIEs, so that the line header table
8076 is available for DW_AT_decl_file. */
8077 setup_type_unit_groups (die
, cu
);
8079 if (die
->child
!= NULL
)
8081 child_die
= die
->child
;
8082 while (child_die
&& child_die
->tag
)
8084 process_die (child_die
, cu
);
8085 child_die
= sibling_die (child_die
);
8092 http://gcc.gnu.org/wiki/DebugFission
8093 http://gcc.gnu.org/wiki/DebugFissionDWP
8095 To simplify handling of both DWO files ("object" files with the DWARF info)
8096 and DWP files (a file with the DWOs packaged up into one file), we treat
8097 DWP files as having a collection of virtual DWO files. */
8100 hash_dwo_file (const void *item
)
8102 const struct dwo_file
*dwo_file
= item
;
8104 return htab_hash_string (dwo_file
->name
);
8108 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8110 const struct dwo_file
*lhs
= item_lhs
;
8111 const struct dwo_file
*rhs
= item_rhs
;
8113 return strcmp (lhs
->name
, rhs
->name
) == 0;
8116 /* Allocate a hash table for DWO files. */
8119 allocate_dwo_file_hash_table (void)
8121 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8123 return htab_create_alloc_ex (41,
8127 &objfile
->objfile_obstack
,
8128 hashtab_obstack_allocate
,
8129 dummy_obstack_deallocate
);
8132 /* Lookup DWO file DWO_NAME. */
8135 lookup_dwo_file_slot (const char *dwo_name
)
8137 struct dwo_file find_entry
;
8140 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8141 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8143 memset (&find_entry
, 0, sizeof (find_entry
));
8144 find_entry
.name
= dwo_name
;
8145 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8151 hash_dwo_unit (const void *item
)
8153 const struct dwo_unit
*dwo_unit
= item
;
8155 /* This drops the top 32 bits of the id, but is ok for a hash. */
8156 return dwo_unit
->signature
;
8160 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8162 const struct dwo_unit
*lhs
= item_lhs
;
8163 const struct dwo_unit
*rhs
= item_rhs
;
8165 /* The signature is assumed to be unique within the DWO file.
8166 So while object file CU dwo_id's always have the value zero,
8167 that's OK, assuming each object file DWO file has only one CU,
8168 and that's the rule for now. */
8169 return lhs
->signature
== rhs
->signature
;
8172 /* Allocate a hash table for DWO CUs,TUs.
8173 There is one of these tables for each of CUs,TUs for each DWO file. */
8176 allocate_dwo_unit_table (struct objfile
*objfile
)
8178 /* Start out with a pretty small number.
8179 Generally DWO files contain only one CU and maybe some TUs. */
8180 return htab_create_alloc_ex (3,
8184 &objfile
->objfile_obstack
,
8185 hashtab_obstack_allocate
,
8186 dummy_obstack_deallocate
);
8189 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8191 struct create_dwo_info_table_data
8193 struct dwo_file
*dwo_file
;
8197 /* die_reader_func for create_dwo_debug_info_hash_table. */
8200 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8202 struct die_info
*comp_unit_die
,
8206 struct dwarf2_cu
*cu
= reader
->cu
;
8207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8208 sect_offset offset
= cu
->per_cu
->offset
;
8209 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8210 struct create_dwo_info_table_data
*data
= datap
;
8211 struct dwo_file
*dwo_file
= data
->dwo_file
;
8212 htab_t cu_htab
= data
->cu_htab
;
8214 struct attribute
*attr
;
8215 struct dwo_unit
*dwo_unit
;
8217 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8220 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8221 " its dwo_id [in module %s]"),
8222 offset
.sect_off
, dwo_file
->name
);
8226 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8227 dwo_unit
->dwo_file
= dwo_file
;
8228 dwo_unit
->signature
= DW_UNSND (attr
);
8229 dwo_unit
->info_or_types_section
= section
;
8230 dwo_unit
->offset
= offset
;
8231 dwo_unit
->length
= cu
->per_cu
->length
;
8233 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8234 gdb_assert (slot
!= NULL
);
8237 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8239 complaint (&symfile_complaints
,
8240 _("debug entry at offset 0x%x is duplicate to the entry at"
8241 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8242 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8243 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8249 if (dwarf2_read_debug
)
8250 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8252 phex (dwo_unit
->signature
,
8253 sizeof (dwo_unit
->signature
)));
8256 /* Create a hash table to map DWO IDs to their CU entry in
8257 .debug_info.dwo in DWO_FILE.
8258 Note: This function processes DWO files only, not DWP files. */
8261 create_dwo_debug_info_hash_table (struct dwo_file
*dwo_file
)
8263 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8264 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8267 gdb_byte
*info_ptr
, *end_ptr
;
8268 struct create_dwo_info_table_data create_dwo_info_table_data
;
8270 dwarf2_read_section (objfile
, section
);
8271 info_ptr
= section
->buffer
;
8273 if (info_ptr
== NULL
)
8276 /* We can't set abfd until now because the section may be empty or
8277 not present, in which case section->asection will be NULL. */
8278 abfd
= section
->asection
->owner
;
8280 if (dwarf2_read_debug
)
8281 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8282 bfd_get_filename (abfd
));
8284 cu_htab
= allocate_dwo_unit_table (objfile
);
8286 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8287 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8289 end_ptr
= info_ptr
+ section
->size
;
8290 while (info_ptr
< end_ptr
)
8292 struct dwarf2_per_cu_data per_cu
;
8294 memset (&per_cu
, 0, sizeof (per_cu
));
8295 per_cu
.objfile
= objfile
;
8296 per_cu
.is_debug_types
= 0;
8297 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8298 per_cu
.info_or_types_section
= section
;
8300 init_cutu_and_read_dies_no_follow (&per_cu
,
8301 &dwo_file
->sections
.abbrev
,
8303 create_dwo_debug_info_hash_table_reader
,
8304 &create_dwo_info_table_data
);
8306 info_ptr
+= per_cu
.length
;
8312 /* DWP file .debug_{cu,tu}_index section format:
8313 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8315 Both index sections have the same format, and serve to map a 64-bit
8316 signature to a set of section numbers. Each section begins with a header,
8317 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8318 indexes, and a pool of 32-bit section numbers. The index sections will be
8319 aligned at 8-byte boundaries in the file.
8321 The index section header contains two unsigned 32-bit values (using the
8322 byte order of the application binary):
8324 N, the number of compilation units or type units in the index
8325 M, the number of slots in the hash table
8327 (We assume that N and M will not exceed 2^32 - 1.)
8329 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8331 The hash table begins at offset 8 in the section, and consists of an array
8332 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8333 order of the application binary). Unused slots in the hash table are 0.
8334 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8336 The parallel table begins immediately after the hash table
8337 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8338 array of 32-bit indexes (using the byte order of the application binary),
8339 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8340 table contains a 32-bit index into the pool of section numbers. For unused
8341 hash table slots, the corresponding entry in the parallel table will be 0.
8343 Given a 64-bit compilation unit signature or a type signature S, an entry
8344 in the hash table is located as follows:
8346 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8347 the low-order k bits all set to 1.
8349 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8351 3) If the hash table entry at index H matches the signature, use that
8352 entry. If the hash table entry at index H is unused (all zeroes),
8353 terminate the search: the signature is not present in the table.
8355 4) Let H = (H + H') modulo M. Repeat at Step 3.
8357 Because M > N and H' and M are relatively prime, the search is guaranteed
8358 to stop at an unused slot or find the match.
8360 The pool of section numbers begins immediately following the hash table
8361 (at offset 8 + 12 * M from the beginning of the section). The pool of
8362 section numbers consists of an array of 32-bit words (using the byte order
8363 of the application binary). Each item in the array is indexed starting
8364 from 0. The hash table entry provides the index of the first section
8365 number in the set. Additional section numbers in the set follow, and the
8366 set is terminated by a 0 entry (section number 0 is not used in ELF).
8368 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8369 section must be the first entry in the set, and the .debug_abbrev.dwo must
8370 be the second entry. Other members of the set may follow in any order. */
8372 /* Create a hash table to map DWO IDs to their CU/TU entry in
8373 .debug_{info,types}.dwo in DWP_FILE.
8374 Returns NULL if there isn't one.
8375 Note: This function processes DWP files only, not DWO files. */
8377 static struct dwp_hash_table
*
8378 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8380 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8381 bfd
*dbfd
= dwp_file
->dbfd
;
8382 char *index_ptr
, *index_end
;
8383 struct dwarf2_section_info
*index
;
8384 uint32_t version
, nr_units
, nr_slots
;
8385 struct dwp_hash_table
*htab
;
8388 index
= &dwp_file
->sections
.tu_index
;
8390 index
= &dwp_file
->sections
.cu_index
;
8392 if (dwarf2_section_empty_p (index
))
8394 dwarf2_read_section (objfile
, index
);
8396 index_ptr
= index
->buffer
;
8397 index_end
= index_ptr
+ index
->size
;
8399 version
= read_4_bytes (dbfd
, index_ptr
);
8400 index_ptr
+= 8; /* Skip the unused word. */
8401 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8403 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8408 error (_("Dwarf Error: unsupported DWP file version (%u)"
8410 version
, dwp_file
->name
);
8412 if (nr_slots
!= (nr_slots
& -nr_slots
))
8414 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8415 " is not power of 2 [in module %s]"),
8416 nr_slots
, dwp_file
->name
);
8419 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8420 htab
->nr_units
= nr_units
;
8421 htab
->nr_slots
= nr_slots
;
8422 htab
->hash_table
= index_ptr
;
8423 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8424 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8429 /* Update SECTIONS with the data from SECTP.
8431 This function is like the other "locate" section routines that are
8432 passed to bfd_map_over_sections, but in this context the sections to
8433 read comes from the DWP hash table, not the full ELF section table.
8435 The result is non-zero for success, or zero if an error was found. */
8438 locate_virtual_dwo_sections (asection
*sectp
,
8439 struct virtual_dwo_sections
*sections
)
8441 const struct dwop_section_names
*names
= &dwop_section_names
;
8443 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8445 /* There can be only one. */
8446 if (sections
->abbrev
.asection
!= NULL
)
8448 sections
->abbrev
.asection
= sectp
;
8449 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8451 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8452 || section_is_p (sectp
->name
, &names
->types_dwo
))
8454 /* There can be only one. */
8455 if (sections
->info_or_types
.asection
!= NULL
)
8457 sections
->info_or_types
.asection
= sectp
;
8458 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8460 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8462 /* There can be only one. */
8463 if (sections
->line
.asection
!= NULL
)
8465 sections
->line
.asection
= sectp
;
8466 sections
->line
.size
= bfd_get_section_size (sectp
);
8468 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8470 /* There can be only one. */
8471 if (sections
->loc
.asection
!= NULL
)
8473 sections
->loc
.asection
= sectp
;
8474 sections
->loc
.size
= bfd_get_section_size (sectp
);
8476 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8478 /* There can be only one. */
8479 if (sections
->macinfo
.asection
!= NULL
)
8481 sections
->macinfo
.asection
= sectp
;
8482 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8484 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8486 /* There can be only one. */
8487 if (sections
->macro
.asection
!= NULL
)
8489 sections
->macro
.asection
= sectp
;
8490 sections
->macro
.size
= bfd_get_section_size (sectp
);
8492 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8494 /* There can be only one. */
8495 if (sections
->str_offsets
.asection
!= NULL
)
8497 sections
->str_offsets
.asection
= sectp
;
8498 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8502 /* No other kind of section is valid. */
8509 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8510 HTAB is the hash table from the DWP file.
8511 SECTION_INDEX is the index of the DWO in HTAB. */
8513 static struct dwo_unit
*
8514 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8515 const struct dwp_hash_table
*htab
,
8516 uint32_t section_index
,
8517 ULONGEST signature
, int is_debug_types
)
8519 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8520 bfd
*dbfd
= dwp_file
->dbfd
;
8521 const char *kind
= is_debug_types
? "TU" : "CU";
8522 struct dwo_file
*dwo_file
;
8523 struct dwo_unit
*dwo_unit
;
8524 struct virtual_dwo_sections sections
;
8525 void **dwo_file_slot
;
8526 char *virtual_dwo_name
;
8527 struct dwarf2_section_info
*cutu
;
8528 struct cleanup
*cleanups
;
8531 if (dwarf2_read_debug
)
8533 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/0x%s in DWP file: %s\n",
8535 section_index
, phex (signature
, sizeof (signature
)),
8539 /* Fetch the sections of this DWO.
8540 Put a limit on the number of sections we look for so that bad data
8541 doesn't cause us to loop forever. */
8543 #define MAX_NR_DWO_SECTIONS \
8544 (1 /* .debug_info or .debug_types */ \
8545 + 1 /* .debug_abbrev */ \
8546 + 1 /* .debug_line */ \
8547 + 1 /* .debug_loc */ \
8548 + 1 /* .debug_str_offsets */ \
8549 + 1 /* .debug_macro */ \
8550 + 1 /* .debug_macinfo */ \
8551 + 1 /* trailing zero */)
8553 memset (§ions
, 0, sizeof (sections
));
8554 cleanups
= make_cleanup (null_cleanup
, 0);
8556 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8559 uint32_t section_nr
=
8562 + (section_index
+ i
) * sizeof (uint32_t));
8564 if (section_nr
== 0)
8566 if (section_nr
>= dwp_file
->num_sections
)
8568 error (_("Dwarf Error: bad DWP hash table, section number too large"
8573 sectp
= dwp_file
->elf_sections
[section_nr
];
8574 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8576 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8583 || sections
.info_or_types
.asection
== NULL
8584 || sections
.abbrev
.asection
== NULL
)
8586 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8590 if (i
== MAX_NR_DWO_SECTIONS
)
8592 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8597 /* It's easier for the rest of the code if we fake a struct dwo_file and
8598 have dwo_unit "live" in that. At least for now.
8600 The DWP file can be made up of a random collection of CUs and TUs.
8601 However, for each CU + set of TUs that came from the same original DWO
8602 file, we want to combine them back into a virtual DWO file to save space
8603 (fewer struct dwo_file objects to allocated). Remember that for really
8604 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8607 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8608 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8609 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8610 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8611 (sections
.str_offsets
.asection
8612 ? sections
.str_offsets
.asection
->id
8614 make_cleanup (xfree
, virtual_dwo_name
);
8615 /* Can we use an existing virtual DWO file? */
8616 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
);
8617 /* Create one if necessary. */
8618 if (*dwo_file_slot
== NULL
)
8620 if (dwarf2_read_debug
)
8622 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8625 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8626 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8628 strlen (virtual_dwo_name
));
8629 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8630 dwo_file
->sections
.line
= sections
.line
;
8631 dwo_file
->sections
.loc
= sections
.loc
;
8632 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8633 dwo_file
->sections
.macro
= sections
.macro
;
8634 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8635 /* The "str" section is global to the entire DWP file. */
8636 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8637 /* The info or types section is assigned later to dwo_unit,
8638 there's no need to record it in dwo_file.
8639 Also, we can't simply record type sections in dwo_file because
8640 we record a pointer into the vector in dwo_unit. As we collect more
8641 types we'll grow the vector and eventually have to reallocate space
8642 for it, invalidating all the pointers into the current copy. */
8643 *dwo_file_slot
= dwo_file
;
8647 if (dwarf2_read_debug
)
8649 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8652 dwo_file
= *dwo_file_slot
;
8654 do_cleanups (cleanups
);
8656 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8657 dwo_unit
->dwo_file
= dwo_file
;
8658 dwo_unit
->signature
= signature
;
8659 dwo_unit
->info_or_types_section
=
8660 obstack_alloc (&objfile
->objfile_obstack
,
8661 sizeof (struct dwarf2_section_info
));
8662 *dwo_unit
->info_or_types_section
= sections
.info_or_types
;
8663 /* offset, length, type_offset_in_tu are set later. */
8668 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8670 static struct dwo_unit
*
8671 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8672 const struct dwp_hash_table
*htab
,
8673 ULONGEST signature
, int is_debug_types
)
8675 bfd
*dbfd
= dwp_file
->dbfd
;
8676 uint32_t mask
= htab
->nr_slots
- 1;
8677 uint32_t hash
= signature
& mask
;
8678 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8681 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8683 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8684 find_dwo_cu
.signature
= signature
;
8685 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8690 /* Use a for loop so that we don't loop forever on bad debug info. */
8691 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8693 ULONGEST signature_in_table
;
8695 signature_in_table
=
8696 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8697 if (signature_in_table
== signature
)
8699 uint32_t section_index
=
8700 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8702 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8703 signature
, is_debug_types
);
8706 if (signature_in_table
== 0)
8708 hash
= (hash
+ hash2
) & mask
;
8711 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8716 /* Subroutine of open_dwop_file to simplify it.
8717 Open the file specified by FILE_NAME and hand it off to BFD for
8718 preliminary analysis. Return a newly initialized bfd *, which
8719 includes a canonicalized copy of FILE_NAME.
8720 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8721 In case of trouble, return NULL.
8722 NOTE: This function is derived from symfile_bfd_open. */
8725 try_open_dwop_file (const char *file_name
, int is_dwp
)
8729 char *absolute_name
;
8731 flags
= OPF_TRY_CWD_FIRST
;
8733 flags
|= OPF_SEARCH_IN_PATH
;
8734 desc
= openp (debug_file_directory
, flags
, file_name
,
8735 O_RDONLY
| O_BINARY
, &absolute_name
);
8739 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8742 xfree (absolute_name
);
8745 xfree (absolute_name
);
8746 bfd_set_cacheable (sym_bfd
, 1);
8748 if (!bfd_check_format (sym_bfd
, bfd_object
))
8750 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8757 /* Try to open DWO/DWP file FILE_NAME.
8758 COMP_DIR is the DW_AT_comp_dir attribute.
8759 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8760 The result is the bfd handle of the file.
8761 If there is a problem finding or opening the file, return NULL.
8762 Upon success, the canonicalized path of the file is stored in the bfd,
8763 same as symfile_bfd_open. */
8766 open_dwop_file (const char *file_name
, const char *comp_dir
, int is_dwp
)
8770 if (IS_ABSOLUTE_PATH (file_name
))
8771 return try_open_dwop_file (file_name
, is_dwp
);
8773 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8775 if (comp_dir
!= NULL
)
8777 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8779 /* NOTE: If comp_dir is a relative path, this will also try the
8780 search path, which seems useful. */
8781 abfd
= try_open_dwop_file (path_to_try
, is_dwp
);
8782 xfree (path_to_try
);
8787 /* That didn't work, try debug-file-directory, which, despite its name,
8788 is a list of paths. */
8790 if (*debug_file_directory
== '\0')
8793 return try_open_dwop_file (file_name
, is_dwp
);
8796 /* This function is mapped across the sections and remembers the offset and
8797 size of each of the DWO debugging sections we are interested in. */
8800 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
8802 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
8803 const struct dwop_section_names
*names
= &dwop_section_names
;
8805 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8807 dwo_sections
->abbrev
.asection
= sectp
;
8808 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8810 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8812 dwo_sections
->info
.asection
= sectp
;
8813 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
8815 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8817 dwo_sections
->line
.asection
= sectp
;
8818 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
8820 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8822 dwo_sections
->loc
.asection
= sectp
;
8823 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
8825 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8827 dwo_sections
->macinfo
.asection
= sectp
;
8828 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8830 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8832 dwo_sections
->macro
.asection
= sectp
;
8833 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
8835 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8837 dwo_sections
->str
.asection
= sectp
;
8838 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
8840 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8842 dwo_sections
->str_offsets
.asection
= sectp
;
8843 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8845 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8847 struct dwarf2_section_info type_section
;
8849 memset (&type_section
, 0, sizeof (type_section
));
8850 type_section
.asection
= sectp
;
8851 type_section
.size
= bfd_get_section_size (sectp
);
8852 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
8857 /* Initialize the use of the DWO file specified by DWO_NAME.
8858 The result is NULL if DWO_NAME can't be found. */
8860 static struct dwo_file
*
8861 open_and_init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8863 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8864 struct dwo_file
*dwo_file
;
8866 struct cleanup
*cleanups
;
8868 dbfd
= open_dwop_file (dwo_name
, comp_dir
, 0);
8871 if (dwarf2_read_debug
)
8872 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
8875 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8876 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8877 dwo_name
, strlen (dwo_name
));
8878 dwo_file
->dbfd
= dbfd
;
8880 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8882 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
8884 dwo_file
->cus
= create_dwo_debug_info_hash_table (dwo_file
);
8886 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8887 dwo_file
->sections
.types
);
8889 discard_cleanups (cleanups
);
8891 if (dwarf2_read_debug
)
8892 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
8897 /* This function is mapped across the sections and remembers the offset and
8898 size of each of the DWP debugging sections we are interested in. */
8901 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
8903 struct dwp_file
*dwp_file
= dwp_file_ptr
;
8904 const struct dwop_section_names
*names
= &dwop_section_names
;
8905 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
8907 /* Record the ELF section number for later lookup: this is what the
8908 .debug_cu_index,.debug_tu_index tables use. */
8909 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
8910 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
8912 /* Look for specific sections that we need. */
8913 if (section_is_p (sectp
->name
, &names
->str_dwo
))
8915 dwp_file
->sections
.str
.asection
= sectp
;
8916 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8918 else if (section_is_p (sectp
->name
, &names
->cu_index
))
8920 dwp_file
->sections
.cu_index
.asection
= sectp
;
8921 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
8923 else if (section_is_p (sectp
->name
, &names
->tu_index
))
8925 dwp_file
->sections
.tu_index
.asection
= sectp
;
8926 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
8930 /* Hash function for dwp_file loaded CUs/TUs. */
8933 hash_dwp_loaded_cutus (const void *item
)
8935 const struct dwo_unit
*dwo_unit
= item
;
8937 /* This drops the top 32 bits of the signature, but is ok for a hash. */
8938 return dwo_unit
->signature
;
8941 /* Equality function for dwp_file loaded CUs/TUs. */
8944 eq_dwp_loaded_cutus (const void *a
, const void *b
)
8946 const struct dwo_unit
*dua
= a
;
8947 const struct dwo_unit
*dub
= b
;
8949 return dua
->signature
== dub
->signature
;
8952 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
8955 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
8957 return htab_create_alloc_ex (3,
8958 hash_dwp_loaded_cutus
,
8959 eq_dwp_loaded_cutus
,
8961 &objfile
->objfile_obstack
,
8962 hashtab_obstack_allocate
,
8963 dummy_obstack_deallocate
);
8966 /* Initialize the use of the DWP file for the current objfile.
8967 By convention the name of the DWP file is ${objfile}.dwp.
8968 The result is NULL if it can't be found. */
8970 static struct dwp_file
*
8971 open_and_init_dwp_file (const char *comp_dir
)
8973 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8974 struct dwp_file
*dwp_file
;
8977 struct cleanup
*cleanups
;
8979 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
8980 cleanups
= make_cleanup (xfree
, dwp_name
);
8982 dbfd
= open_dwop_file (dwp_name
, comp_dir
, 1);
8985 if (dwarf2_read_debug
)
8986 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
8987 do_cleanups (cleanups
);
8990 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
8991 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8992 dwp_name
, strlen (dwp_name
));
8993 dwp_file
->dbfd
= dbfd
;
8994 do_cleanups (cleanups
);
8996 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwp_file
);
8998 /* +1: section 0 is unused */
8999 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
9000 dwp_file
->elf_sections
=
9001 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9002 dwp_file
->num_sections
, asection
*);
9004 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9006 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9008 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9010 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9012 discard_cleanups (cleanups
);
9014 if (dwarf2_read_debug
)
9016 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9017 fprintf_unfiltered (gdb_stdlog
,
9018 " %u CUs, %u TUs\n",
9019 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9020 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9026 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9027 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9028 or in the DWP file for the objfile, referenced by THIS_UNIT.
9029 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9030 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9032 This is called, for example, when wanting to read a variable with a
9033 complex location. Therefore we don't want to do file i/o for every call.
9034 Therefore we don't want to look for a DWO file on every call.
9035 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9036 then we check if we've already seen DWO_NAME, and only THEN do we check
9039 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9040 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9042 static struct dwo_unit
*
9043 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9044 const char *dwo_name
, const char *comp_dir
,
9045 ULONGEST signature
, int is_debug_types
)
9047 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9048 const char *kind
= is_debug_types
? "TU" : "CU";
9049 void **dwo_file_slot
;
9050 struct dwo_file
*dwo_file
;
9051 struct dwp_file
*dwp_file
;
9053 /* Have we already read SIGNATURE from a DWP file? */
9055 if (! dwarf2_per_objfile
->dwp_checked
)
9057 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file (comp_dir
);
9058 dwarf2_per_objfile
->dwp_checked
= 1;
9060 dwp_file
= dwarf2_per_objfile
->dwp_file
;
9062 if (dwp_file
!= NULL
)
9064 const struct dwp_hash_table
*dwp_htab
=
9065 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9067 if (dwp_htab
!= NULL
)
9069 struct dwo_unit
*dwo_cutu
=
9070 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, signature
, is_debug_types
);
9072 if (dwo_cutu
!= NULL
)
9074 if (dwarf2_read_debug
)
9076 fprintf_unfiltered (gdb_stdlog
,
9077 "Virtual DWO %s %s found: @%s\n",
9078 kind
, hex_string (signature
),
9079 host_address_to_string (dwo_cutu
));
9086 /* Have we already seen DWO_NAME? */
9088 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
);
9089 if (*dwo_file_slot
== NULL
)
9091 /* Read in the file and build a table of the DWOs it contains. */
9092 *dwo_file_slot
= open_and_init_dwo_file (dwo_name
, comp_dir
);
9094 /* NOTE: This will be NULL if unable to open the file. */
9095 dwo_file
= *dwo_file_slot
;
9097 if (dwo_file
!= NULL
)
9099 htab_t htab
= is_debug_types
? dwo_file
->tus
: dwo_file
->cus
;
9103 struct dwo_unit find_dwo_cutu
, *dwo_cutu
;
9105 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9106 find_dwo_cutu
.signature
= signature
;
9107 dwo_cutu
= htab_find (htab
, &find_dwo_cutu
);
9109 if (dwo_cutu
!= NULL
)
9111 if (dwarf2_read_debug
)
9113 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9114 kind
, dwo_name
, hex_string (signature
),
9115 host_address_to_string (dwo_cutu
));
9122 /* We didn't find it. This could mean a dwo_id mismatch, or
9123 someone deleted the DWO/DWP file, or the search path isn't set up
9124 correctly to find the file. */
9126 if (dwarf2_read_debug
)
9128 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9129 kind
, dwo_name
, hex_string (signature
));
9132 complaint (&symfile_complaints
,
9133 _("Could not find DWO CU referenced by CU at offset 0x%x"
9135 this_unit
->offset
.sect_off
, objfile
->name
);
9139 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9140 See lookup_dwo_cutu_unit for details. */
9142 static struct dwo_unit
*
9143 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9144 const char *dwo_name
, const char *comp_dir
,
9147 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9150 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9151 See lookup_dwo_cutu_unit for details. */
9153 static struct dwo_unit
*
9154 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9155 const char *dwo_name
, const char *comp_dir
)
9157 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9160 /* Free all resources associated with DWO_FILE.
9161 Close the DWO file and munmap the sections.
9162 All memory should be on the objfile obstack. */
9165 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9168 struct dwarf2_section_info
*section
;
9170 gdb_assert (dwo_file
->dbfd
!= objfile
->obfd
);
9171 gdb_bfd_unref (dwo_file
->dbfd
);
9173 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9176 /* Wrapper for free_dwo_file for use in cleanups. */
9179 free_dwo_file_cleanup (void *arg
)
9181 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9182 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9184 free_dwo_file (dwo_file
, objfile
);
9187 /* Traversal function for free_dwo_files. */
9190 free_dwo_file_from_slot (void **slot
, void *info
)
9192 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9193 struct objfile
*objfile
= (struct objfile
*) info
;
9195 free_dwo_file (dwo_file
, objfile
);
9200 /* Free all resources associated with DWO_FILES. */
9203 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9205 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9208 /* Read in various DIEs. */
9210 /* qsort helper for inherit_abstract_dies. */
9213 unsigned_int_compar (const void *ap
, const void *bp
)
9215 unsigned int a
= *(unsigned int *) ap
;
9216 unsigned int b
= *(unsigned int *) bp
;
9218 return (a
> b
) - (b
> a
);
9221 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9222 Inherit only the children of the DW_AT_abstract_origin DIE not being
9223 already referenced by DW_AT_abstract_origin from the children of the
9227 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9229 struct die_info
*child_die
;
9230 unsigned die_children_count
;
9231 /* CU offsets which were referenced by children of the current DIE. */
9232 sect_offset
*offsets
;
9233 sect_offset
*offsets_end
, *offsetp
;
9234 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9235 struct die_info
*origin_die
;
9236 /* Iterator of the ORIGIN_DIE children. */
9237 struct die_info
*origin_child_die
;
9238 struct cleanup
*cleanups
;
9239 struct attribute
*attr
;
9240 struct dwarf2_cu
*origin_cu
;
9241 struct pending
**origin_previous_list_in_scope
;
9243 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9247 /* Note that following die references may follow to a die in a
9251 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9253 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9255 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9256 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9258 if (die
->tag
!= origin_die
->tag
9259 && !(die
->tag
== DW_TAG_inlined_subroutine
9260 && origin_die
->tag
== DW_TAG_subprogram
))
9261 complaint (&symfile_complaints
,
9262 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9263 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9265 child_die
= die
->child
;
9266 die_children_count
= 0;
9267 while (child_die
&& child_die
->tag
)
9269 child_die
= sibling_die (child_die
);
9270 die_children_count
++;
9272 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9273 cleanups
= make_cleanup (xfree
, offsets
);
9275 offsets_end
= offsets
;
9276 child_die
= die
->child
;
9277 while (child_die
&& child_die
->tag
)
9279 /* For each CHILD_DIE, find the corresponding child of
9280 ORIGIN_DIE. If there is more than one layer of
9281 DW_AT_abstract_origin, follow them all; there shouldn't be,
9282 but GCC versions at least through 4.4 generate this (GCC PR
9284 struct die_info
*child_origin_die
= child_die
;
9285 struct dwarf2_cu
*child_origin_cu
= cu
;
9289 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9293 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9297 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9298 counterpart may exist. */
9299 if (child_origin_die
!= child_die
)
9301 if (child_die
->tag
!= child_origin_die
->tag
9302 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9303 && child_origin_die
->tag
== DW_TAG_subprogram
))
9304 complaint (&symfile_complaints
,
9305 _("Child DIE 0x%x and its abstract origin 0x%x have "
9306 "different tags"), child_die
->offset
.sect_off
,
9307 child_origin_die
->offset
.sect_off
);
9308 if (child_origin_die
->parent
!= origin_die
)
9309 complaint (&symfile_complaints
,
9310 _("Child DIE 0x%x and its abstract origin 0x%x have "
9311 "different parents"), child_die
->offset
.sect_off
,
9312 child_origin_die
->offset
.sect_off
);
9314 *offsets_end
++ = child_origin_die
->offset
;
9316 child_die
= sibling_die (child_die
);
9318 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9319 unsigned_int_compar
);
9320 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9321 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9322 complaint (&symfile_complaints
,
9323 _("Multiple children of DIE 0x%x refer "
9324 "to DIE 0x%x as their abstract origin"),
9325 die
->offset
.sect_off
, offsetp
->sect_off
);
9328 origin_child_die
= origin_die
->child
;
9329 while (origin_child_die
&& origin_child_die
->tag
)
9331 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9332 while (offsetp
< offsets_end
9333 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9335 if (offsetp
>= offsets_end
9336 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9338 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9339 process_die (origin_child_die
, origin_cu
);
9341 origin_child_die
= sibling_die (origin_child_die
);
9343 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9345 do_cleanups (cleanups
);
9349 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9351 struct objfile
*objfile
= cu
->objfile
;
9352 struct context_stack
*new;
9355 struct die_info
*child_die
;
9356 struct attribute
*attr
, *call_line
, *call_file
;
9359 struct block
*block
;
9360 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9361 VEC (symbolp
) *template_args
= NULL
;
9362 struct template_symbol
*templ_func
= NULL
;
9366 /* If we do not have call site information, we can't show the
9367 caller of this inlined function. That's too confusing, so
9368 only use the scope for local variables. */
9369 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9370 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9371 if (call_line
== NULL
|| call_file
== NULL
)
9373 read_lexical_block_scope (die
, cu
);
9378 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9380 name
= dwarf2_name (die
, cu
);
9382 /* Ignore functions with missing or empty names. These are actually
9383 illegal according to the DWARF standard. */
9386 complaint (&symfile_complaints
,
9387 _("missing name for subprogram DIE at %d"),
9388 die
->offset
.sect_off
);
9392 /* Ignore functions with missing or invalid low and high pc attributes. */
9393 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9395 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9396 if (!attr
|| !DW_UNSND (attr
))
9397 complaint (&symfile_complaints
,
9398 _("cannot get low and high bounds "
9399 "for subprogram DIE at %d"),
9400 die
->offset
.sect_off
);
9407 /* If we have any template arguments, then we must allocate a
9408 different sort of symbol. */
9409 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9411 if (child_die
->tag
== DW_TAG_template_type_param
9412 || child_die
->tag
== DW_TAG_template_value_param
)
9414 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
9415 struct template_symbol
);
9416 templ_func
->base
.is_cplus_template_function
= 1;
9421 new = push_context (0, lowpc
);
9422 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9423 (struct symbol
*) templ_func
);
9425 /* If there is a location expression for DW_AT_frame_base, record
9427 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9429 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9430 expression is being recorded directly in the function's symbol
9431 and not in a separate frame-base object. I guess this hack is
9432 to avoid adding some sort of frame-base adjunct/annex to the
9433 function's symbol :-(. The problem with doing this is that it
9434 results in a function symbol with a location expression that
9435 has nothing to do with the location of the function, ouch! The
9436 relationship should be: a function's symbol has-a frame base; a
9437 frame-base has-a location expression. */
9438 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
9440 cu
->list_in_scope
= &local_symbols
;
9442 if (die
->child
!= NULL
)
9444 child_die
= die
->child
;
9445 while (child_die
&& child_die
->tag
)
9447 if (child_die
->tag
== DW_TAG_template_type_param
9448 || child_die
->tag
== DW_TAG_template_value_param
)
9450 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9453 VEC_safe_push (symbolp
, template_args
, arg
);
9456 process_die (child_die
, cu
);
9457 child_die
= sibling_die (child_die
);
9461 inherit_abstract_dies (die
, cu
);
9463 /* If we have a DW_AT_specification, we might need to import using
9464 directives from the context of the specification DIE. See the
9465 comment in determine_prefix. */
9466 if (cu
->language
== language_cplus
9467 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9469 struct dwarf2_cu
*spec_cu
= cu
;
9470 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9474 child_die
= spec_die
->child
;
9475 while (child_die
&& child_die
->tag
)
9477 if (child_die
->tag
== DW_TAG_imported_module
)
9478 process_die (child_die
, spec_cu
);
9479 child_die
= sibling_die (child_die
);
9482 /* In some cases, GCC generates specification DIEs that
9483 themselves contain DW_AT_specification attributes. */
9484 spec_die
= die_specification (spec_die
, &spec_cu
);
9488 new = pop_context ();
9489 /* Make a block for the local symbols within. */
9490 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9491 lowpc
, highpc
, objfile
);
9493 /* For C++, set the block's scope. */
9494 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9495 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
9496 determine_prefix (die
, cu
),
9497 processing_has_namespace_info
);
9499 /* If we have address ranges, record them. */
9500 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9502 /* Attach template arguments to function. */
9503 if (! VEC_empty (symbolp
, template_args
))
9505 gdb_assert (templ_func
!= NULL
);
9507 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9508 templ_func
->template_arguments
9509 = obstack_alloc (&objfile
->objfile_obstack
,
9510 (templ_func
->n_template_arguments
9511 * sizeof (struct symbol
*)));
9512 memcpy (templ_func
->template_arguments
,
9513 VEC_address (symbolp
, template_args
),
9514 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9515 VEC_free (symbolp
, template_args
);
9518 /* In C++, we can have functions nested inside functions (e.g., when
9519 a function declares a class that has methods). This means that
9520 when we finish processing a function scope, we may need to go
9521 back to building a containing block's symbol lists. */
9522 local_symbols
= new->locals
;
9523 using_directives
= new->using_directives
;
9525 /* If we've finished processing a top-level function, subsequent
9526 symbols go in the file symbol list. */
9527 if (outermost_context_p ())
9528 cu
->list_in_scope
= &file_symbols
;
9531 /* Process all the DIES contained within a lexical block scope. Start
9532 a new scope, process the dies, and then close the scope. */
9535 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9537 struct objfile
*objfile
= cu
->objfile
;
9538 struct context_stack
*new;
9539 CORE_ADDR lowpc
, highpc
;
9540 struct die_info
*child_die
;
9543 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9545 /* Ignore blocks with missing or invalid low and high pc attributes. */
9546 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9547 as multiple lexical blocks? Handling children in a sane way would
9548 be nasty. Might be easier to properly extend generic blocks to
9550 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9555 push_context (0, lowpc
);
9556 if (die
->child
!= NULL
)
9558 child_die
= die
->child
;
9559 while (child_die
&& child_die
->tag
)
9561 process_die (child_die
, cu
);
9562 child_die
= sibling_die (child_die
);
9565 new = pop_context ();
9567 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9570 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9573 /* Note that recording ranges after traversing children, as we
9574 do here, means that recording a parent's ranges entails
9575 walking across all its children's ranges as they appear in
9576 the address map, which is quadratic behavior.
9578 It would be nicer to record the parent's ranges before
9579 traversing its children, simply overriding whatever you find
9580 there. But since we don't even decide whether to create a
9581 block until after we've traversed its children, that's hard
9583 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9585 local_symbols
= new->locals
;
9586 using_directives
= new->using_directives
;
9589 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9592 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9594 struct objfile
*objfile
= cu
->objfile
;
9595 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9596 CORE_ADDR pc
, baseaddr
;
9597 struct attribute
*attr
;
9598 struct call_site
*call_site
, call_site_local
;
9601 struct die_info
*child_die
;
9603 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9605 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9608 complaint (&symfile_complaints
,
9609 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9610 "DIE 0x%x [in module %s]"),
9611 die
->offset
.sect_off
, objfile
->name
);
9614 pc
= DW_ADDR (attr
) + baseaddr
;
9616 if (cu
->call_site_htab
== NULL
)
9617 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9618 NULL
, &objfile
->objfile_obstack
,
9619 hashtab_obstack_allocate
, NULL
);
9620 call_site_local
.pc
= pc
;
9621 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9624 complaint (&symfile_complaints
,
9625 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9626 "DIE 0x%x [in module %s]"),
9627 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9631 /* Count parameters at the caller. */
9634 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9635 child_die
= sibling_die (child_die
))
9637 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9639 complaint (&symfile_complaints
,
9640 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9641 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9642 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9649 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9650 (sizeof (*call_site
)
9651 + (sizeof (*call_site
->parameter
)
9654 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9657 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9659 struct die_info
*func_die
;
9661 /* Skip also over DW_TAG_inlined_subroutine. */
9662 for (func_die
= die
->parent
;
9663 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9664 && func_die
->tag
!= DW_TAG_subroutine_type
;
9665 func_die
= func_die
->parent
);
9667 /* DW_AT_GNU_all_call_sites is a superset
9668 of DW_AT_GNU_all_tail_call_sites. */
9670 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9671 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9673 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9674 not complete. But keep CALL_SITE for look ups via call_site_htab,
9675 both the initial caller containing the real return address PC and
9676 the final callee containing the current PC of a chain of tail
9677 calls do not need to have the tail call list complete. But any
9678 function candidate for a virtual tail call frame searched via
9679 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9680 determined unambiguously. */
9684 struct type
*func_type
= NULL
;
9687 func_type
= get_die_type (func_die
, cu
);
9688 if (func_type
!= NULL
)
9690 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9692 /* Enlist this call site to the function. */
9693 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9694 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9697 complaint (&symfile_complaints
,
9698 _("Cannot find function owning DW_TAG_GNU_call_site "
9699 "DIE 0x%x [in module %s]"),
9700 die
->offset
.sect_off
, objfile
->name
);
9704 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9706 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9707 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9708 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9709 /* Keep NULL DWARF_BLOCK. */;
9710 else if (attr_form_is_block (attr
))
9712 struct dwarf2_locexpr_baton
*dlbaton
;
9714 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9715 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9716 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9717 dlbaton
->per_cu
= cu
->per_cu
;
9719 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9721 else if (is_ref_attr (attr
))
9723 struct dwarf2_cu
*target_cu
= cu
;
9724 struct die_info
*target_die
;
9726 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9727 gdb_assert (target_cu
->objfile
== objfile
);
9728 if (die_is_declaration (target_die
, target_cu
))
9730 const char *target_physname
;
9732 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9733 if (target_physname
== NULL
)
9734 complaint (&symfile_complaints
,
9735 _("DW_AT_GNU_call_site_target target DIE has invalid "
9736 "physname, for referencing DIE 0x%x [in module %s]"),
9737 die
->offset
.sect_off
, objfile
->name
);
9739 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
9745 /* DW_AT_entry_pc should be preferred. */
9746 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9747 complaint (&symfile_complaints
,
9748 _("DW_AT_GNU_call_site_target target DIE has invalid "
9749 "low pc, for referencing DIE 0x%x [in module %s]"),
9750 die
->offset
.sect_off
, objfile
->name
);
9752 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9756 complaint (&symfile_complaints
,
9757 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9758 "block nor reference, for DIE 0x%x [in module %s]"),
9759 die
->offset
.sect_off
, objfile
->name
);
9761 call_site
->per_cu
= cu
->per_cu
;
9763 for (child_die
= die
->child
;
9764 child_die
&& child_die
->tag
;
9765 child_die
= sibling_die (child_die
))
9767 struct call_site_parameter
*parameter
;
9768 struct attribute
*loc
, *origin
;
9770 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9772 /* Already printed the complaint above. */
9776 gdb_assert (call_site
->parameter_count
< nparams
);
9777 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9779 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9780 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9781 register is contained in DW_AT_GNU_call_site_value. */
9783 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9784 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9785 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9789 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9790 offset
= dwarf2_get_ref_die_offset (origin
);
9791 if (!offset_in_cu_p (&cu
->header
, offset
))
9793 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9794 binding can be done only inside one CU. Such referenced DIE
9795 therefore cannot be even moved to DW_TAG_partial_unit. */
9796 complaint (&symfile_complaints
,
9797 _("DW_AT_abstract_origin offset is not in CU for "
9798 "DW_TAG_GNU_call_site child DIE 0x%x "
9800 child_die
->offset
.sect_off
, objfile
->name
);
9803 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9804 - cu
->header
.offset
.sect_off
);
9806 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9808 complaint (&symfile_complaints
,
9809 _("No DW_FORM_block* DW_AT_location for "
9810 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9811 child_die
->offset
.sect_off
, objfile
->name
);
9816 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9817 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9818 if (parameter
->u
.dwarf_reg
!= -1)
9819 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9820 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9821 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9822 ¶meter
->u
.fb_offset
))
9823 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9826 complaint (&symfile_complaints
,
9827 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9828 "for DW_FORM_block* DW_AT_location is supported for "
9829 "DW_TAG_GNU_call_site child DIE 0x%x "
9831 child_die
->offset
.sect_off
, objfile
->name
);
9836 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9837 if (!attr_form_is_block (attr
))
9839 complaint (&symfile_complaints
,
9840 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9841 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9842 child_die
->offset
.sect_off
, objfile
->name
);
9845 parameter
->value
= DW_BLOCK (attr
)->data
;
9846 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9848 /* Parameters are not pre-cleared by memset above. */
9849 parameter
->data_value
= NULL
;
9850 parameter
->data_value_size
= 0;
9851 call_site
->parameter_count
++;
9853 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9856 if (!attr_form_is_block (attr
))
9857 complaint (&symfile_complaints
,
9858 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9859 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9860 child_die
->offset
.sect_off
, objfile
->name
);
9863 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9864 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9870 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9871 Return 1 if the attributes are present and valid, otherwise, return 0.
9872 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9875 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9876 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9877 struct partial_symtab
*ranges_pst
)
9879 struct objfile
*objfile
= cu
->objfile
;
9880 struct comp_unit_head
*cu_header
= &cu
->header
;
9881 bfd
*obfd
= objfile
->obfd
;
9882 unsigned int addr_size
= cu_header
->addr_size
;
9883 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9884 /* Base address selection entry. */
9895 found_base
= cu
->base_known
;
9896 base
= cu
->base_address
;
9898 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9899 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9901 complaint (&symfile_complaints
,
9902 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9906 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9908 /* Read in the largest possible address. */
9909 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9910 if ((marker
& mask
) == mask
)
9912 /* If we found the largest possible address, then
9913 read the base address. */
9914 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9915 buffer
+= 2 * addr_size
;
9916 offset
+= 2 * addr_size
;
9922 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9926 CORE_ADDR range_beginning
, range_end
;
9928 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9929 buffer
+= addr_size
;
9930 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9931 buffer
+= addr_size
;
9932 offset
+= 2 * addr_size
;
9934 /* An end of list marker is a pair of zero addresses. */
9935 if (range_beginning
== 0 && range_end
== 0)
9936 /* Found the end of list entry. */
9939 /* Each base address selection entry is a pair of 2 values.
9940 The first is the largest possible address, the second is
9941 the base address. Check for a base address here. */
9942 if ((range_beginning
& mask
) == mask
)
9944 /* If we found the largest possible address, then
9945 read the base address. */
9946 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9953 /* We have no valid base address for the ranges
9955 complaint (&symfile_complaints
,
9956 _("Invalid .debug_ranges data (no base address)"));
9960 if (range_beginning
> range_end
)
9962 /* Inverted range entries are invalid. */
9963 complaint (&symfile_complaints
,
9964 _("Invalid .debug_ranges data (inverted range)"));
9968 /* Empty range entries have no effect. */
9969 if (range_beginning
== range_end
)
9972 range_beginning
+= base
;
9975 /* A not-uncommon case of bad debug info.
9976 Don't pollute the addrmap with bad data. */
9977 if (range_beginning
+ baseaddr
== 0
9978 && !dwarf2_per_objfile
->has_section_at_zero
)
9980 complaint (&symfile_complaints
,
9981 _(".debug_ranges entry has start address of zero"
9982 " [in module %s]"), objfile
->name
);
9986 if (ranges_pst
!= NULL
)
9987 addrmap_set_empty (objfile
->psymtabs_addrmap
,
9988 range_beginning
+ baseaddr
,
9989 range_end
- 1 + baseaddr
,
9992 /* FIXME: This is recording everything as a low-high
9993 segment of consecutive addresses. We should have a
9994 data structure for discontiguous block ranges
9998 low
= range_beginning
;
10004 if (range_beginning
< low
)
10005 low
= range_beginning
;
10006 if (range_end
> high
)
10012 /* If the first entry is an end-of-list marker, the range
10013 describes an empty scope, i.e. no instructions. */
10019 *high_return
= high
;
10023 /* Get low and high pc attributes from a die. Return 1 if the attributes
10024 are present and valid, otherwise, return 0. Return -1 if the range is
10025 discontinuous, i.e. derived from DW_AT_ranges information. */
10028 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10029 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10030 struct partial_symtab
*pst
)
10032 struct attribute
*attr
;
10033 struct attribute
*attr_high
;
10035 CORE_ADDR high
= 0;
10038 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10041 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10044 low
= DW_ADDR (attr
);
10045 if (attr_high
->form
== DW_FORM_addr
10046 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10047 high
= DW_ADDR (attr_high
);
10049 high
= low
+ DW_UNSND (attr_high
);
10052 /* Found high w/o low attribute. */
10055 /* Found consecutive range of addresses. */
10060 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10063 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10064 We take advantage of the fact that DW_AT_ranges does not appear
10065 in DW_TAG_compile_unit of DWO files. */
10066 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10067 unsigned int ranges_offset
= (DW_UNSND (attr
)
10068 + (need_ranges_base
10072 /* Value of the DW_AT_ranges attribute is the offset in the
10073 .debug_ranges section. */
10074 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10076 /* Found discontinuous range of addresses. */
10081 /* read_partial_die has also the strict LOW < HIGH requirement. */
10085 /* When using the GNU linker, .gnu.linkonce. sections are used to
10086 eliminate duplicate copies of functions and vtables and such.
10087 The linker will arbitrarily choose one and discard the others.
10088 The AT_*_pc values for such functions refer to local labels in
10089 these sections. If the section from that file was discarded, the
10090 labels are not in the output, so the relocs get a value of 0.
10091 If this is a discarded function, mark the pc bounds as invalid,
10092 so that GDB will ignore it. */
10093 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10102 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10103 its low and high PC addresses. Do nothing if these addresses could not
10104 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10105 and HIGHPC to the high address if greater than HIGHPC. */
10108 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10109 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10110 struct dwarf2_cu
*cu
)
10112 CORE_ADDR low
, high
;
10113 struct die_info
*child
= die
->child
;
10115 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10117 *lowpc
= min (*lowpc
, low
);
10118 *highpc
= max (*highpc
, high
);
10121 /* If the language does not allow nested subprograms (either inside
10122 subprograms or lexical blocks), we're done. */
10123 if (cu
->language
!= language_ada
)
10126 /* Check all the children of the given DIE. If it contains nested
10127 subprograms, then check their pc bounds. Likewise, we need to
10128 check lexical blocks as well, as they may also contain subprogram
10130 while (child
&& child
->tag
)
10132 if (child
->tag
== DW_TAG_subprogram
10133 || child
->tag
== DW_TAG_lexical_block
)
10134 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10135 child
= sibling_die (child
);
10139 /* Get the low and high pc's represented by the scope DIE, and store
10140 them in *LOWPC and *HIGHPC. If the correct values can't be
10141 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10144 get_scope_pc_bounds (struct die_info
*die
,
10145 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10146 struct dwarf2_cu
*cu
)
10148 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10149 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10150 CORE_ADDR current_low
, current_high
;
10152 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10154 best_low
= current_low
;
10155 best_high
= current_high
;
10159 struct die_info
*child
= die
->child
;
10161 while (child
&& child
->tag
)
10163 switch (child
->tag
) {
10164 case DW_TAG_subprogram
:
10165 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10167 case DW_TAG_namespace
:
10168 case DW_TAG_module
:
10169 /* FIXME: carlton/2004-01-16: Should we do this for
10170 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10171 that current GCC's always emit the DIEs corresponding
10172 to definitions of methods of classes as children of a
10173 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10174 the DIEs giving the declarations, which could be
10175 anywhere). But I don't see any reason why the
10176 standards says that they have to be there. */
10177 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10179 if (current_low
!= ((CORE_ADDR
) -1))
10181 best_low
= min (best_low
, current_low
);
10182 best_high
= max (best_high
, current_high
);
10190 child
= sibling_die (child
);
10195 *highpc
= best_high
;
10198 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10202 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10203 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10205 struct objfile
*objfile
= cu
->objfile
;
10206 struct attribute
*attr
;
10207 struct attribute
*attr_high
;
10209 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10212 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10215 CORE_ADDR low
= DW_ADDR (attr
);
10217 if (attr_high
->form
== DW_FORM_addr
10218 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10219 high
= DW_ADDR (attr_high
);
10221 high
= low
+ DW_UNSND (attr_high
);
10223 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10227 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10230 bfd
*obfd
= objfile
->obfd
;
10231 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10232 We take advantage of the fact that DW_AT_ranges does not appear
10233 in DW_TAG_compile_unit of DWO files. */
10234 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10236 /* The value of the DW_AT_ranges attribute is the offset of the
10237 address range list in the .debug_ranges section. */
10238 unsigned long offset
= (DW_UNSND (attr
)
10239 + (need_ranges_base
? cu
->ranges_base
: 0));
10240 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10242 /* For some target architectures, but not others, the
10243 read_address function sign-extends the addresses it returns.
10244 To recognize base address selection entries, we need a
10246 unsigned int addr_size
= cu
->header
.addr_size
;
10247 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10249 /* The base address, to which the next pair is relative. Note
10250 that this 'base' is a DWARF concept: most entries in a range
10251 list are relative, to reduce the number of relocs against the
10252 debugging information. This is separate from this function's
10253 'baseaddr' argument, which GDB uses to relocate debugging
10254 information from a shared library based on the address at
10255 which the library was loaded. */
10256 CORE_ADDR base
= cu
->base_address
;
10257 int base_known
= cu
->base_known
;
10259 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10260 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10262 complaint (&symfile_complaints
,
10263 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10270 unsigned int bytes_read
;
10271 CORE_ADDR start
, end
;
10273 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10274 buffer
+= bytes_read
;
10275 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10276 buffer
+= bytes_read
;
10278 /* Did we find the end of the range list? */
10279 if (start
== 0 && end
== 0)
10282 /* Did we find a base address selection entry? */
10283 else if ((start
& base_select_mask
) == base_select_mask
)
10289 /* We found an ordinary address range. */
10294 complaint (&symfile_complaints
,
10295 _("Invalid .debug_ranges data "
10296 "(no base address)"));
10302 /* Inverted range entries are invalid. */
10303 complaint (&symfile_complaints
,
10304 _("Invalid .debug_ranges data "
10305 "(inverted range)"));
10309 /* Empty range entries have no effect. */
10313 start
+= base
+ baseaddr
;
10314 end
+= base
+ baseaddr
;
10316 /* A not-uncommon case of bad debug info.
10317 Don't pollute the addrmap with bad data. */
10318 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10320 complaint (&symfile_complaints
,
10321 _(".debug_ranges entry has start address of zero"
10322 " [in module %s]"), objfile
->name
);
10326 record_block_range (block
, start
, end
- 1);
10332 /* Check whether the producer field indicates either of GCC < 4.6, or the
10333 Intel C/C++ compiler, and cache the result in CU. */
10336 check_producer (struct dwarf2_cu
*cu
)
10339 int major
, minor
, release
;
10341 if (cu
->producer
== NULL
)
10343 /* For unknown compilers expect their behavior is DWARF version
10346 GCC started to support .debug_types sections by -gdwarf-4 since
10347 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10348 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10349 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10350 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10352 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10354 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10356 cs
= &cu
->producer
[strlen ("GNU ")];
10357 while (*cs
&& !isdigit (*cs
))
10359 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10361 /* Not recognized as GCC. */
10365 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10366 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10369 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10370 cu
->producer_is_icc
= 1;
10373 /* For other non-GCC compilers, expect their behavior is DWARF version
10377 cu
->checked_producer
= 1;
10380 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10381 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10382 during 4.6.0 experimental. */
10385 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10387 if (!cu
->checked_producer
)
10388 check_producer (cu
);
10390 return cu
->producer_is_gxx_lt_4_6
;
10393 /* Return the default accessibility type if it is not overriden by
10394 DW_AT_accessibility. */
10396 static enum dwarf_access_attribute
10397 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10399 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10401 /* The default DWARF 2 accessibility for members is public, the default
10402 accessibility for inheritance is private. */
10404 if (die
->tag
!= DW_TAG_inheritance
)
10405 return DW_ACCESS_public
;
10407 return DW_ACCESS_private
;
10411 /* DWARF 3+ defines the default accessibility a different way. The same
10412 rules apply now for DW_TAG_inheritance as for the members and it only
10413 depends on the container kind. */
10415 if (die
->parent
->tag
== DW_TAG_class_type
)
10416 return DW_ACCESS_private
;
10418 return DW_ACCESS_public
;
10422 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10423 offset. If the attribute was not found return 0, otherwise return
10424 1. If it was found but could not properly be handled, set *OFFSET
10428 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10431 struct attribute
*attr
;
10433 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10438 /* Note that we do not check for a section offset first here.
10439 This is because DW_AT_data_member_location is new in DWARF 4,
10440 so if we see it, we can assume that a constant form is really
10441 a constant and not a section offset. */
10442 if (attr_form_is_constant (attr
))
10443 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10444 else if (attr_form_is_section_offset (attr
))
10445 dwarf2_complex_location_expr_complaint ();
10446 else if (attr_form_is_block (attr
))
10447 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10449 dwarf2_complex_location_expr_complaint ();
10457 /* Add an aggregate field to the field list. */
10460 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10461 struct dwarf2_cu
*cu
)
10463 struct objfile
*objfile
= cu
->objfile
;
10464 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10465 struct nextfield
*new_field
;
10466 struct attribute
*attr
;
10468 char *fieldname
= "";
10470 /* Allocate a new field list entry and link it in. */
10471 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10472 make_cleanup (xfree
, new_field
);
10473 memset (new_field
, 0, sizeof (struct nextfield
));
10475 if (die
->tag
== DW_TAG_inheritance
)
10477 new_field
->next
= fip
->baseclasses
;
10478 fip
->baseclasses
= new_field
;
10482 new_field
->next
= fip
->fields
;
10483 fip
->fields
= new_field
;
10487 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10489 new_field
->accessibility
= DW_UNSND (attr
);
10491 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10492 if (new_field
->accessibility
!= DW_ACCESS_public
)
10493 fip
->non_public_fields
= 1;
10495 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10497 new_field
->virtuality
= DW_UNSND (attr
);
10499 new_field
->virtuality
= DW_VIRTUALITY_none
;
10501 fp
= &new_field
->field
;
10503 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10507 /* Data member other than a C++ static data member. */
10509 /* Get type of field. */
10510 fp
->type
= die_type (die
, cu
);
10512 SET_FIELD_BITPOS (*fp
, 0);
10514 /* Get bit size of field (zero if none). */
10515 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10518 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10522 FIELD_BITSIZE (*fp
) = 0;
10525 /* Get bit offset of field. */
10526 if (handle_data_member_location (die
, cu
, &offset
))
10527 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10528 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10531 if (gdbarch_bits_big_endian (gdbarch
))
10533 /* For big endian bits, the DW_AT_bit_offset gives the
10534 additional bit offset from the MSB of the containing
10535 anonymous object to the MSB of the field. We don't
10536 have to do anything special since we don't need to
10537 know the size of the anonymous object. */
10538 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10542 /* For little endian bits, compute the bit offset to the
10543 MSB of the anonymous object, subtract off the number of
10544 bits from the MSB of the field to the MSB of the
10545 object, and then subtract off the number of bits of
10546 the field itself. The result is the bit offset of
10547 the LSB of the field. */
10548 int anonymous_size
;
10549 int bit_offset
= DW_UNSND (attr
);
10551 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10554 /* The size of the anonymous object containing
10555 the bit field is explicit, so use the
10556 indicated size (in bytes). */
10557 anonymous_size
= DW_UNSND (attr
);
10561 /* The size of the anonymous object containing
10562 the bit field must be inferred from the type
10563 attribute of the data member containing the
10565 anonymous_size
= TYPE_LENGTH (fp
->type
);
10567 SET_FIELD_BITPOS (*fp
,
10568 (FIELD_BITPOS (*fp
)
10569 + anonymous_size
* bits_per_byte
10570 - bit_offset
- FIELD_BITSIZE (*fp
)));
10574 /* Get name of field. */
10575 fieldname
= dwarf2_name (die
, cu
);
10576 if (fieldname
== NULL
)
10579 /* The name is already allocated along with this objfile, so we don't
10580 need to duplicate it for the type. */
10581 fp
->name
= fieldname
;
10583 /* Change accessibility for artificial fields (e.g. virtual table
10584 pointer or virtual base class pointer) to private. */
10585 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10587 FIELD_ARTIFICIAL (*fp
) = 1;
10588 new_field
->accessibility
= DW_ACCESS_private
;
10589 fip
->non_public_fields
= 1;
10592 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10594 /* C++ static member. */
10596 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10597 is a declaration, but all versions of G++ as of this writing
10598 (so through at least 3.2.1) incorrectly generate
10599 DW_TAG_variable tags. */
10601 const char *physname
;
10603 /* Get name of field. */
10604 fieldname
= dwarf2_name (die
, cu
);
10605 if (fieldname
== NULL
)
10608 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10610 /* Only create a symbol if this is an external value.
10611 new_symbol checks this and puts the value in the global symbol
10612 table, which we want. If it is not external, new_symbol
10613 will try to put the value in cu->list_in_scope which is wrong. */
10614 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10616 /* A static const member, not much different than an enum as far as
10617 we're concerned, except that we can support more types. */
10618 new_symbol (die
, NULL
, cu
);
10621 /* Get physical name. */
10622 physname
= dwarf2_physname (fieldname
, die
, cu
);
10624 /* The name is already allocated along with this objfile, so we don't
10625 need to duplicate it for the type. */
10626 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10627 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10628 FIELD_NAME (*fp
) = fieldname
;
10630 else if (die
->tag
== DW_TAG_inheritance
)
10634 /* C++ base class field. */
10635 if (handle_data_member_location (die
, cu
, &offset
))
10636 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10637 FIELD_BITSIZE (*fp
) = 0;
10638 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10639 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10640 fip
->nbaseclasses
++;
10644 /* Add a typedef defined in the scope of the FIP's class. */
10647 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10648 struct dwarf2_cu
*cu
)
10650 struct objfile
*objfile
= cu
->objfile
;
10651 struct typedef_field_list
*new_field
;
10652 struct attribute
*attr
;
10653 struct typedef_field
*fp
;
10654 char *fieldname
= "";
10656 /* Allocate a new field list entry and link it in. */
10657 new_field
= xzalloc (sizeof (*new_field
));
10658 make_cleanup (xfree
, new_field
);
10660 gdb_assert (die
->tag
== DW_TAG_typedef
);
10662 fp
= &new_field
->field
;
10664 /* Get name of field. */
10665 fp
->name
= dwarf2_name (die
, cu
);
10666 if (fp
->name
== NULL
)
10669 fp
->type
= read_type_die (die
, cu
);
10671 new_field
->next
= fip
->typedef_field_list
;
10672 fip
->typedef_field_list
= new_field
;
10673 fip
->typedef_field_list_count
++;
10676 /* Create the vector of fields, and attach it to the type. */
10679 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10680 struct dwarf2_cu
*cu
)
10682 int nfields
= fip
->nfields
;
10684 /* Record the field count, allocate space for the array of fields,
10685 and create blank accessibility bitfields if necessary. */
10686 TYPE_NFIELDS (type
) = nfields
;
10687 TYPE_FIELDS (type
) = (struct field
*)
10688 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10689 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10691 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10693 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10695 TYPE_FIELD_PRIVATE_BITS (type
) =
10696 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10697 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10699 TYPE_FIELD_PROTECTED_BITS (type
) =
10700 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10701 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10703 TYPE_FIELD_IGNORE_BITS (type
) =
10704 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10705 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10708 /* If the type has baseclasses, allocate and clear a bit vector for
10709 TYPE_FIELD_VIRTUAL_BITS. */
10710 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10712 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10713 unsigned char *pointer
;
10715 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10716 pointer
= TYPE_ALLOC (type
, num_bytes
);
10717 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10718 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10719 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10722 /* Copy the saved-up fields into the field vector. Start from the head of
10723 the list, adding to the tail of the field array, so that they end up in
10724 the same order in the array in which they were added to the list. */
10725 while (nfields
-- > 0)
10727 struct nextfield
*fieldp
;
10731 fieldp
= fip
->fields
;
10732 fip
->fields
= fieldp
->next
;
10736 fieldp
= fip
->baseclasses
;
10737 fip
->baseclasses
= fieldp
->next
;
10740 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10741 switch (fieldp
->accessibility
)
10743 case DW_ACCESS_private
:
10744 if (cu
->language
!= language_ada
)
10745 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10748 case DW_ACCESS_protected
:
10749 if (cu
->language
!= language_ada
)
10750 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10753 case DW_ACCESS_public
:
10757 /* Unknown accessibility. Complain and treat it as public. */
10759 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10760 fieldp
->accessibility
);
10764 if (nfields
< fip
->nbaseclasses
)
10766 switch (fieldp
->virtuality
)
10768 case DW_VIRTUALITY_virtual
:
10769 case DW_VIRTUALITY_pure_virtual
:
10770 if (cu
->language
== language_ada
)
10771 error (_("unexpected virtuality in component of Ada type"));
10772 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10779 /* Return true if this member function is a constructor, false
10783 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
10785 const char *fieldname
;
10786 const char *typename
;
10789 if (die
->parent
== NULL
)
10792 if (die
->parent
->tag
!= DW_TAG_structure_type
10793 && die
->parent
->tag
!= DW_TAG_union_type
10794 && die
->parent
->tag
!= DW_TAG_class_type
)
10797 fieldname
= dwarf2_name (die
, cu
);
10798 typename
= dwarf2_name (die
->parent
, cu
);
10799 if (fieldname
== NULL
|| typename
== NULL
)
10802 len
= strlen (fieldname
);
10803 return (strncmp (fieldname
, typename
, len
) == 0
10804 && (typename
[len
] == '\0' || typename
[len
] == '<'));
10807 /* Add a member function to the proper fieldlist. */
10810 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10811 struct type
*type
, struct dwarf2_cu
*cu
)
10813 struct objfile
*objfile
= cu
->objfile
;
10814 struct attribute
*attr
;
10815 struct fnfieldlist
*flp
;
10817 struct fn_field
*fnp
;
10819 struct nextfnfield
*new_fnfield
;
10820 struct type
*this_type
;
10821 enum dwarf_access_attribute accessibility
;
10823 if (cu
->language
== language_ada
)
10824 error (_("unexpected member function in Ada type"));
10826 /* Get name of member function. */
10827 fieldname
= dwarf2_name (die
, cu
);
10828 if (fieldname
== NULL
)
10831 /* Look up member function name in fieldlist. */
10832 for (i
= 0; i
< fip
->nfnfields
; i
++)
10834 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10838 /* Create new list element if necessary. */
10839 if (i
< fip
->nfnfields
)
10840 flp
= &fip
->fnfieldlists
[i
];
10843 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10845 fip
->fnfieldlists
= (struct fnfieldlist
*)
10846 xrealloc (fip
->fnfieldlists
,
10847 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10848 * sizeof (struct fnfieldlist
));
10849 if (fip
->nfnfields
== 0)
10850 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10852 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10853 flp
->name
= fieldname
;
10856 i
= fip
->nfnfields
++;
10859 /* Create a new member function field and chain it to the field list
10861 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10862 make_cleanup (xfree
, new_fnfield
);
10863 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10864 new_fnfield
->next
= flp
->head
;
10865 flp
->head
= new_fnfield
;
10868 /* Fill in the member function field info. */
10869 fnp
= &new_fnfield
->fnfield
;
10871 /* Delay processing of the physname until later. */
10872 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10874 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10879 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10880 fnp
->physname
= physname
? physname
: "";
10883 fnp
->type
= alloc_type (objfile
);
10884 this_type
= read_type_die (die
, cu
);
10885 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10887 int nparams
= TYPE_NFIELDS (this_type
);
10889 /* TYPE is the domain of this method, and THIS_TYPE is the type
10890 of the method itself (TYPE_CODE_METHOD). */
10891 smash_to_method_type (fnp
->type
, type
,
10892 TYPE_TARGET_TYPE (this_type
),
10893 TYPE_FIELDS (this_type
),
10894 TYPE_NFIELDS (this_type
),
10895 TYPE_VARARGS (this_type
));
10897 /* Handle static member functions.
10898 Dwarf2 has no clean way to discern C++ static and non-static
10899 member functions. G++ helps GDB by marking the first
10900 parameter for non-static member functions (which is the this
10901 pointer) as artificial. We obtain this information from
10902 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10903 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10904 fnp
->voffset
= VOFFSET_STATIC
;
10907 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10908 dwarf2_full_name (fieldname
, die
, cu
));
10910 /* Get fcontext from DW_AT_containing_type if present. */
10911 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10912 fnp
->fcontext
= die_containing_type (die
, cu
);
10914 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10915 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10917 /* Get accessibility. */
10918 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10920 accessibility
= DW_UNSND (attr
);
10922 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10923 switch (accessibility
)
10925 case DW_ACCESS_private
:
10926 fnp
->is_private
= 1;
10928 case DW_ACCESS_protected
:
10929 fnp
->is_protected
= 1;
10933 /* Check for artificial methods. */
10934 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
10935 if (attr
&& DW_UNSND (attr
) != 0)
10936 fnp
->is_artificial
= 1;
10938 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
10940 /* Get index in virtual function table if it is a virtual member
10941 function. For older versions of GCC, this is an offset in the
10942 appropriate virtual table, as specified by DW_AT_containing_type.
10943 For everyone else, it is an expression to be evaluated relative
10944 to the object address. */
10946 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
10949 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
10951 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
10953 /* Old-style GCC. */
10954 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
10956 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10957 || (DW_BLOCK (attr
)->size
> 1
10958 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
10959 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
10961 struct dwarf_block blk
;
10964 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10966 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
10967 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
10968 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10969 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
10970 dwarf2_complex_location_expr_complaint ();
10972 fnp
->voffset
/= cu
->header
.addr_size
;
10976 dwarf2_complex_location_expr_complaint ();
10978 if (!fnp
->fcontext
)
10979 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
10981 else if (attr_form_is_section_offset (attr
))
10983 dwarf2_complex_location_expr_complaint ();
10987 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
10993 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10994 if (attr
&& DW_UNSND (attr
))
10996 /* GCC does this, as of 2008-08-25; PR debug/37237. */
10997 complaint (&symfile_complaints
,
10998 _("Member function \"%s\" (offset %d) is virtual "
10999 "but the vtable offset is not specified"),
11000 fieldname
, die
->offset
.sect_off
);
11001 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11002 TYPE_CPLUS_DYNAMIC (type
) = 1;
11007 /* Create the vector of member function fields, and attach it to the type. */
11010 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11011 struct dwarf2_cu
*cu
)
11013 struct fnfieldlist
*flp
;
11016 if (cu
->language
== language_ada
)
11017 error (_("unexpected member functions in Ada type"));
11019 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11020 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11021 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11023 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11025 struct nextfnfield
*nfp
= flp
->head
;
11026 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11029 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11030 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11031 fn_flp
->fn_fields
= (struct fn_field
*)
11032 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11033 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11034 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11037 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11040 /* Returns non-zero if NAME is the name of a vtable member in CU's
11041 language, zero otherwise. */
11043 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11045 static const char vptr
[] = "_vptr";
11046 static const char vtable
[] = "vtable";
11048 /* Look for the C++ and Java forms of the vtable. */
11049 if ((cu
->language
== language_java
11050 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11051 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11052 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11058 /* GCC outputs unnamed structures that are really pointers to member
11059 functions, with the ABI-specified layout. If TYPE describes
11060 such a structure, smash it into a member function type.
11062 GCC shouldn't do this; it should just output pointer to member DIEs.
11063 This is GCC PR debug/28767. */
11066 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11068 struct type
*pfn_type
, *domain_type
, *new_type
;
11070 /* Check for a structure with no name and two children. */
11071 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11074 /* Check for __pfn and __delta members. */
11075 if (TYPE_FIELD_NAME (type
, 0) == NULL
11076 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11077 || TYPE_FIELD_NAME (type
, 1) == NULL
11078 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11081 /* Find the type of the method. */
11082 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11083 if (pfn_type
== NULL
11084 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11085 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11088 /* Look for the "this" argument. */
11089 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11090 if (TYPE_NFIELDS (pfn_type
) == 0
11091 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11092 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11095 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11096 new_type
= alloc_type (objfile
);
11097 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11098 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11099 TYPE_VARARGS (pfn_type
));
11100 smash_to_methodptr_type (type
, new_type
);
11103 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11107 producer_is_icc (struct dwarf2_cu
*cu
)
11109 if (!cu
->checked_producer
)
11110 check_producer (cu
);
11112 return cu
->producer_is_icc
;
11115 /* Called when we find the DIE that starts a structure or union scope
11116 (definition) to create a type for the structure or union. Fill in
11117 the type's name and general properties; the members will not be
11118 processed until process_structure_type.
11120 NOTE: we need to call these functions regardless of whether or not the
11121 DIE has a DW_AT_name attribute, since it might be an anonymous
11122 structure or union. This gets the type entered into our set of
11123 user defined types.
11125 However, if the structure is incomplete (an opaque struct/union)
11126 then suppress creating a symbol table entry for it since gdb only
11127 wants to find the one with the complete definition. Note that if
11128 it is complete, we just call new_symbol, which does it's own
11129 checking about whether the struct/union is anonymous or not (and
11130 suppresses creating a symbol table entry itself). */
11132 static struct type
*
11133 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11135 struct objfile
*objfile
= cu
->objfile
;
11137 struct attribute
*attr
;
11140 /* If the definition of this type lives in .debug_types, read that type.
11141 Don't follow DW_AT_specification though, that will take us back up
11142 the chain and we want to go down. */
11143 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11146 struct dwarf2_cu
*type_cu
= cu
;
11147 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11149 /* We could just recurse on read_structure_type, but we need to call
11150 get_die_type to ensure only one type for this DIE is created.
11151 This is important, for example, because for c++ classes we need
11152 TYPE_NAME set which is only done by new_symbol. Blech. */
11153 type
= read_type_die (type_die
, type_cu
);
11155 /* TYPE_CU may not be the same as CU.
11156 Ensure TYPE is recorded in CU's type_hash table. */
11157 return set_die_type (die
, type
, cu
);
11160 type
= alloc_type (objfile
);
11161 INIT_CPLUS_SPECIFIC (type
);
11163 name
= dwarf2_name (die
, cu
);
11166 if (cu
->language
== language_cplus
11167 || cu
->language
== language_java
)
11169 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
11171 /* dwarf2_full_name might have already finished building the DIE's
11172 type. If so, there is no need to continue. */
11173 if (get_die_type (die
, cu
) != NULL
)
11174 return get_die_type (die
, cu
);
11176 TYPE_TAG_NAME (type
) = full_name
;
11177 if (die
->tag
== DW_TAG_structure_type
11178 || die
->tag
== DW_TAG_class_type
)
11179 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11183 /* The name is already allocated along with this objfile, so
11184 we don't need to duplicate it for the type. */
11185 TYPE_TAG_NAME (type
) = (char *) name
;
11186 if (die
->tag
== DW_TAG_class_type
)
11187 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11191 if (die
->tag
== DW_TAG_structure_type
)
11193 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11195 else if (die
->tag
== DW_TAG_union_type
)
11197 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11201 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11204 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11205 TYPE_DECLARED_CLASS (type
) = 1;
11207 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11210 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11214 TYPE_LENGTH (type
) = 0;
11217 if (producer_is_icc (cu
))
11219 /* ICC does not output the required DW_AT_declaration
11220 on incomplete types, but gives them a size of zero. */
11223 TYPE_STUB_SUPPORTED (type
) = 1;
11225 if (die_is_declaration (die
, cu
))
11226 TYPE_STUB (type
) = 1;
11227 else if (attr
== NULL
&& die
->child
== NULL
11228 && producer_is_realview (cu
->producer
))
11229 /* RealView does not output the required DW_AT_declaration
11230 on incomplete types. */
11231 TYPE_STUB (type
) = 1;
11233 /* We need to add the type field to the die immediately so we don't
11234 infinitely recurse when dealing with pointers to the structure
11235 type within the structure itself. */
11236 set_die_type (die
, type
, cu
);
11238 /* set_die_type should be already done. */
11239 set_descriptive_type (type
, die
, cu
);
11244 /* Finish creating a structure or union type, including filling in
11245 its members and creating a symbol for it. */
11248 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11250 struct objfile
*objfile
= cu
->objfile
;
11251 struct die_info
*child_die
= die
->child
;
11254 type
= get_die_type (die
, cu
);
11256 type
= read_structure_type (die
, cu
);
11258 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11260 struct field_info fi
;
11261 struct die_info
*child_die
;
11262 VEC (symbolp
) *template_args
= NULL
;
11263 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11265 memset (&fi
, 0, sizeof (struct field_info
));
11267 child_die
= die
->child
;
11269 while (child_die
&& child_die
->tag
)
11271 if (child_die
->tag
== DW_TAG_member
11272 || child_die
->tag
== DW_TAG_variable
)
11274 /* NOTE: carlton/2002-11-05: A C++ static data member
11275 should be a DW_TAG_member that is a declaration, but
11276 all versions of G++ as of this writing (so through at
11277 least 3.2.1) incorrectly generate DW_TAG_variable
11278 tags for them instead. */
11279 dwarf2_add_field (&fi
, child_die
, cu
);
11281 else if (child_die
->tag
== DW_TAG_subprogram
)
11283 /* C++ member function. */
11284 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11286 else if (child_die
->tag
== DW_TAG_inheritance
)
11288 /* C++ base class field. */
11289 dwarf2_add_field (&fi
, child_die
, cu
);
11291 else if (child_die
->tag
== DW_TAG_typedef
)
11292 dwarf2_add_typedef (&fi
, child_die
, cu
);
11293 else if (child_die
->tag
== DW_TAG_template_type_param
11294 || child_die
->tag
== DW_TAG_template_value_param
)
11296 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11299 VEC_safe_push (symbolp
, template_args
, arg
);
11302 child_die
= sibling_die (child_die
);
11305 /* Attach template arguments to type. */
11306 if (! VEC_empty (symbolp
, template_args
))
11308 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11309 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11310 = VEC_length (symbolp
, template_args
);
11311 TYPE_TEMPLATE_ARGUMENTS (type
)
11312 = obstack_alloc (&objfile
->objfile_obstack
,
11313 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11314 * sizeof (struct symbol
*)));
11315 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11316 VEC_address (symbolp
, template_args
),
11317 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11318 * sizeof (struct symbol
*)));
11319 VEC_free (symbolp
, template_args
);
11322 /* Attach fields and member functions to the type. */
11324 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11327 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11329 /* Get the type which refers to the base class (possibly this
11330 class itself) which contains the vtable pointer for the current
11331 class from the DW_AT_containing_type attribute. This use of
11332 DW_AT_containing_type is a GNU extension. */
11334 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11336 struct type
*t
= die_containing_type (die
, cu
);
11338 TYPE_VPTR_BASETYPE (type
) = t
;
11343 /* Our own class provides vtbl ptr. */
11344 for (i
= TYPE_NFIELDS (t
) - 1;
11345 i
>= TYPE_N_BASECLASSES (t
);
11348 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11350 if (is_vtable_name (fieldname
, cu
))
11352 TYPE_VPTR_FIELDNO (type
) = i
;
11357 /* Complain if virtual function table field not found. */
11358 if (i
< TYPE_N_BASECLASSES (t
))
11359 complaint (&symfile_complaints
,
11360 _("virtual function table pointer "
11361 "not found when defining class '%s'"),
11362 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11367 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11370 else if (cu
->producer
11371 && strncmp (cu
->producer
,
11372 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11374 /* The IBM XLC compiler does not provide direct indication
11375 of the containing type, but the vtable pointer is
11376 always named __vfp. */
11380 for (i
= TYPE_NFIELDS (type
) - 1;
11381 i
>= TYPE_N_BASECLASSES (type
);
11384 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11386 TYPE_VPTR_FIELDNO (type
) = i
;
11387 TYPE_VPTR_BASETYPE (type
) = type
;
11394 /* Copy fi.typedef_field_list linked list elements content into the
11395 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11396 if (fi
.typedef_field_list
)
11398 int i
= fi
.typedef_field_list_count
;
11400 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11401 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11402 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11403 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11405 /* Reverse the list order to keep the debug info elements order. */
11408 struct typedef_field
*dest
, *src
;
11410 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11411 src
= &fi
.typedef_field_list
->field
;
11412 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11417 do_cleanups (back_to
);
11419 if (HAVE_CPLUS_STRUCT (type
))
11420 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11423 quirk_gcc_member_function_pointer (type
, objfile
);
11425 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11426 snapshots) has been known to create a die giving a declaration
11427 for a class that has, as a child, a die giving a definition for a
11428 nested class. So we have to process our children even if the
11429 current die is a declaration. Normally, of course, a declaration
11430 won't have any children at all. */
11432 while (child_die
!= NULL
&& child_die
->tag
)
11434 if (child_die
->tag
== DW_TAG_member
11435 || child_die
->tag
== DW_TAG_variable
11436 || child_die
->tag
== DW_TAG_inheritance
11437 || child_die
->tag
== DW_TAG_template_value_param
11438 || child_die
->tag
== DW_TAG_template_type_param
)
11443 process_die (child_die
, cu
);
11445 child_die
= sibling_die (child_die
);
11448 /* Do not consider external references. According to the DWARF standard,
11449 these DIEs are identified by the fact that they have no byte_size
11450 attribute, and a declaration attribute. */
11451 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11452 || !die_is_declaration (die
, cu
))
11453 new_symbol (die
, type
, cu
);
11456 /* Given a DW_AT_enumeration_type die, set its type. We do not
11457 complete the type's fields yet, or create any symbols. */
11459 static struct type
*
11460 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11462 struct objfile
*objfile
= cu
->objfile
;
11464 struct attribute
*attr
;
11467 /* If the definition of this type lives in .debug_types, read that type.
11468 Don't follow DW_AT_specification though, that will take us back up
11469 the chain and we want to go down. */
11470 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11473 struct dwarf2_cu
*type_cu
= cu
;
11474 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11476 type
= read_type_die (type_die
, type_cu
);
11478 /* TYPE_CU may not be the same as CU.
11479 Ensure TYPE is recorded in CU's type_hash table. */
11480 return set_die_type (die
, type
, cu
);
11483 type
= alloc_type (objfile
);
11485 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11486 name
= dwarf2_full_name (NULL
, die
, cu
);
11488 TYPE_TAG_NAME (type
) = (char *) name
;
11490 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11493 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11497 TYPE_LENGTH (type
) = 0;
11500 /* The enumeration DIE can be incomplete. In Ada, any type can be
11501 declared as private in the package spec, and then defined only
11502 inside the package body. Such types are known as Taft Amendment
11503 Types. When another package uses such a type, an incomplete DIE
11504 may be generated by the compiler. */
11505 if (die_is_declaration (die
, cu
))
11506 TYPE_STUB (type
) = 1;
11508 return set_die_type (die
, type
, cu
);
11511 /* Given a pointer to a die which begins an enumeration, process all
11512 the dies that define the members of the enumeration, and create the
11513 symbol for the enumeration type.
11515 NOTE: We reverse the order of the element list. */
11518 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11520 struct type
*this_type
;
11522 this_type
= get_die_type (die
, cu
);
11523 if (this_type
== NULL
)
11524 this_type
= read_enumeration_type (die
, cu
);
11526 if (die
->child
!= NULL
)
11528 struct die_info
*child_die
;
11529 struct symbol
*sym
;
11530 struct field
*fields
= NULL
;
11531 int num_fields
= 0;
11532 int unsigned_enum
= 1;
11537 child_die
= die
->child
;
11538 while (child_die
&& child_die
->tag
)
11540 if (child_die
->tag
!= DW_TAG_enumerator
)
11542 process_die (child_die
, cu
);
11546 name
= dwarf2_name (child_die
, cu
);
11549 sym
= new_symbol (child_die
, this_type
, cu
);
11550 if (SYMBOL_VALUE (sym
) < 0)
11555 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11558 mask
|= SYMBOL_VALUE (sym
);
11560 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11562 fields
= (struct field
*)
11564 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11565 * sizeof (struct field
));
11568 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11569 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11570 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11571 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11577 child_die
= sibling_die (child_die
);
11582 TYPE_NFIELDS (this_type
) = num_fields
;
11583 TYPE_FIELDS (this_type
) = (struct field
*)
11584 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11585 memcpy (TYPE_FIELDS (this_type
), fields
,
11586 sizeof (struct field
) * num_fields
);
11590 TYPE_UNSIGNED (this_type
) = 1;
11592 TYPE_FLAG_ENUM (this_type
) = 1;
11595 /* If we are reading an enum from a .debug_types unit, and the enum
11596 is a declaration, and the enum is not the signatured type in the
11597 unit, then we do not want to add a symbol for it. Adding a
11598 symbol would in some cases obscure the true definition of the
11599 enum, giving users an incomplete type when the definition is
11600 actually available. Note that we do not want to do this for all
11601 enums which are just declarations, because C++0x allows forward
11602 enum declarations. */
11603 if (cu
->per_cu
->is_debug_types
11604 && die_is_declaration (die
, cu
))
11606 struct signatured_type
*sig_type
;
11609 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
11610 cu
->per_cu
->info_or_types_section
,
11611 cu
->per_cu
->offset
);
11612 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11613 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11617 new_symbol (die
, this_type
, cu
);
11620 /* Extract all information from a DW_TAG_array_type DIE and put it in
11621 the DIE's type field. For now, this only handles one dimensional
11624 static struct type
*
11625 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11627 struct objfile
*objfile
= cu
->objfile
;
11628 struct die_info
*child_die
;
11630 struct type
*element_type
, *range_type
, *index_type
;
11631 struct type
**range_types
= NULL
;
11632 struct attribute
*attr
;
11634 struct cleanup
*back_to
;
11637 element_type
= die_type (die
, cu
);
11639 /* The die_type call above may have already set the type for this DIE. */
11640 type
= get_die_type (die
, cu
);
11644 /* Irix 6.2 native cc creates array types without children for
11645 arrays with unspecified length. */
11646 if (die
->child
== NULL
)
11648 index_type
= objfile_type (objfile
)->builtin_int
;
11649 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11650 type
= create_array_type (NULL
, element_type
, range_type
);
11651 return set_die_type (die
, type
, cu
);
11654 back_to
= make_cleanup (null_cleanup
, NULL
);
11655 child_die
= die
->child
;
11656 while (child_die
&& child_die
->tag
)
11658 if (child_die
->tag
== DW_TAG_subrange_type
)
11660 struct type
*child_type
= read_type_die (child_die
, cu
);
11662 if (child_type
!= NULL
)
11664 /* The range type was succesfully read. Save it for the
11665 array type creation. */
11666 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11668 range_types
= (struct type
**)
11669 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11670 * sizeof (struct type
*));
11672 make_cleanup (free_current_contents
, &range_types
);
11674 range_types
[ndim
++] = child_type
;
11677 child_die
= sibling_die (child_die
);
11680 /* Dwarf2 dimensions are output from left to right, create the
11681 necessary array types in backwards order. */
11683 type
= element_type
;
11685 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11690 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11695 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11698 /* Understand Dwarf2 support for vector types (like they occur on
11699 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11700 array type. This is not part of the Dwarf2/3 standard yet, but a
11701 custom vendor extension. The main difference between a regular
11702 array and the vector variant is that vectors are passed by value
11704 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11706 make_vector_type (type
);
11708 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11709 implementation may choose to implement triple vectors using this
11711 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11714 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11715 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11717 complaint (&symfile_complaints
,
11718 _("DW_AT_byte_size for array type smaller "
11719 "than the total size of elements"));
11722 name
= dwarf2_name (die
, cu
);
11724 TYPE_NAME (type
) = name
;
11726 /* Install the type in the die. */
11727 set_die_type (die
, type
, cu
);
11729 /* set_die_type should be already done. */
11730 set_descriptive_type (type
, die
, cu
);
11732 do_cleanups (back_to
);
11737 static enum dwarf_array_dim_ordering
11738 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11740 struct attribute
*attr
;
11742 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11744 if (attr
) return DW_SND (attr
);
11746 /* GNU F77 is a special case, as at 08/2004 array type info is the
11747 opposite order to the dwarf2 specification, but data is still
11748 laid out as per normal fortran.
11750 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11751 version checking. */
11753 if (cu
->language
== language_fortran
11754 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11756 return DW_ORD_row_major
;
11759 switch (cu
->language_defn
->la_array_ordering
)
11761 case array_column_major
:
11762 return DW_ORD_col_major
;
11763 case array_row_major
:
11765 return DW_ORD_row_major
;
11769 /* Extract all information from a DW_TAG_set_type DIE and put it in
11770 the DIE's type field. */
11772 static struct type
*
11773 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11775 struct type
*domain_type
, *set_type
;
11776 struct attribute
*attr
;
11778 domain_type
= die_type (die
, cu
);
11780 /* The die_type call above may have already set the type for this DIE. */
11781 set_type
= get_die_type (die
, cu
);
11785 set_type
= create_set_type (NULL
, domain_type
);
11787 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11789 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11791 return set_die_type (die
, set_type
, cu
);
11794 /* A helper for read_common_block that creates a locexpr baton.
11795 SYM is the symbol which we are marking as computed.
11796 COMMON_DIE is the DIE for the common block.
11797 COMMON_LOC is the location expression attribute for the common
11799 MEMBER_LOC is the location expression attribute for the particular
11800 member of the common block that we are processing.
11801 CU is the CU from which the above come. */
11804 mark_common_block_symbol_computed (struct symbol
*sym
,
11805 struct die_info
*common_die
,
11806 struct attribute
*common_loc
,
11807 struct attribute
*member_loc
,
11808 struct dwarf2_cu
*cu
)
11810 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11811 struct dwarf2_locexpr_baton
*baton
;
11813 unsigned int cu_off
;
11814 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
11815 LONGEST offset
= 0;
11817 gdb_assert (common_loc
&& member_loc
);
11818 gdb_assert (attr_form_is_block (common_loc
));
11819 gdb_assert (attr_form_is_block (member_loc
)
11820 || attr_form_is_constant (member_loc
));
11822 baton
= obstack_alloc (&objfile
->objfile_obstack
,
11823 sizeof (struct dwarf2_locexpr_baton
));
11824 baton
->per_cu
= cu
->per_cu
;
11825 gdb_assert (baton
->per_cu
);
11827 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11829 if (attr_form_is_constant (member_loc
))
11831 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
11832 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
11835 baton
->size
+= DW_BLOCK (member_loc
)->size
;
11837 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
11840 *ptr
++ = DW_OP_call4
;
11841 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
11842 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
11845 if (attr_form_is_constant (member_loc
))
11847 *ptr
++ = DW_OP_addr
;
11848 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
11849 ptr
+= cu
->header
.addr_size
;
11853 /* We have to copy the data here, because DW_OP_call4 will only
11854 use a DW_AT_location attribute. */
11855 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
11856 ptr
+= DW_BLOCK (member_loc
)->size
;
11859 *ptr
++ = DW_OP_plus
;
11860 gdb_assert (ptr
- baton
->data
== baton
->size
);
11862 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11863 SYMBOL_LOCATION_BATON (sym
) = baton
;
11864 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11867 /* Create appropriate locally-scoped variables for all the
11868 DW_TAG_common_block entries. Also create a struct common_block
11869 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11870 is used to sepate the common blocks name namespace from regular
11874 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11876 struct attribute
*attr
;
11878 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11881 /* Support the .debug_loc offsets. */
11882 if (attr_form_is_block (attr
))
11886 else if (attr_form_is_section_offset (attr
))
11888 dwarf2_complex_location_expr_complaint ();
11893 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11894 "common block member");
11899 if (die
->child
!= NULL
)
11901 struct objfile
*objfile
= cu
->objfile
;
11902 struct die_info
*child_die
;
11903 size_t n_entries
= 0, size
;
11904 struct common_block
*common_block
;
11905 struct symbol
*sym
;
11907 for (child_die
= die
->child
;
11908 child_die
&& child_die
->tag
;
11909 child_die
= sibling_die (child_die
))
11912 size
= (sizeof (struct common_block
)
11913 + (n_entries
- 1) * sizeof (struct symbol
*));
11914 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
11915 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
11916 common_block
->n_entries
= 0;
11918 for (child_die
= die
->child
;
11919 child_die
&& child_die
->tag
;
11920 child_die
= sibling_die (child_die
))
11922 /* Create the symbol in the DW_TAG_common_block block in the current
11924 sym
= new_symbol (child_die
, NULL
, cu
);
11927 struct attribute
*member_loc
;
11929 common_block
->contents
[common_block
->n_entries
++] = sym
;
11931 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
11935 /* GDB has handled this for a long time, but it is
11936 not specified by DWARF. It seems to have been
11937 emitted by gfortran at least as recently as:
11938 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
11939 complaint (&symfile_complaints
,
11940 _("Variable in common block has "
11941 "DW_AT_data_member_location "
11942 "- DIE at 0x%x [in module %s]"),
11943 child_die
->offset
.sect_off
, cu
->objfile
->name
);
11945 if (attr_form_is_section_offset (member_loc
))
11946 dwarf2_complex_location_expr_complaint ();
11947 else if (attr_form_is_constant (member_loc
)
11948 || attr_form_is_block (member_loc
))
11951 mark_common_block_symbol_computed (sym
, die
, attr
,
11955 dwarf2_complex_location_expr_complaint ();
11960 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
11961 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
11965 /* Create a type for a C++ namespace. */
11967 static struct type
*
11968 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11970 struct objfile
*objfile
= cu
->objfile
;
11971 const char *previous_prefix
, *name
;
11975 /* For extensions, reuse the type of the original namespace. */
11976 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
11978 struct die_info
*ext_die
;
11979 struct dwarf2_cu
*ext_cu
= cu
;
11981 ext_die
= dwarf2_extension (die
, &ext_cu
);
11982 type
= read_type_die (ext_die
, ext_cu
);
11984 /* EXT_CU may not be the same as CU.
11985 Ensure TYPE is recorded in CU's type_hash table. */
11986 return set_die_type (die
, type
, cu
);
11989 name
= namespace_name (die
, &is_anonymous
, cu
);
11991 /* Now build the name of the current namespace. */
11993 previous_prefix
= determine_prefix (die
, cu
);
11994 if (previous_prefix
[0] != '\0')
11995 name
= typename_concat (&objfile
->objfile_obstack
,
11996 previous_prefix
, name
, 0, cu
);
11998 /* Create the type. */
11999 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12001 TYPE_NAME (type
) = (char *) name
;
12002 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12004 return set_die_type (die
, type
, cu
);
12007 /* Read a C++ namespace. */
12010 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12012 struct objfile
*objfile
= cu
->objfile
;
12015 /* Add a symbol associated to this if we haven't seen the namespace
12016 before. Also, add a using directive if it's an anonymous
12019 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12023 type
= read_type_die (die
, cu
);
12024 new_symbol (die
, type
, cu
);
12026 namespace_name (die
, &is_anonymous
, cu
);
12029 const char *previous_prefix
= determine_prefix (die
, cu
);
12031 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12032 NULL
, NULL
, &objfile
->objfile_obstack
);
12036 if (die
->child
!= NULL
)
12038 struct die_info
*child_die
= die
->child
;
12040 while (child_die
&& child_die
->tag
)
12042 process_die (child_die
, cu
);
12043 child_die
= sibling_die (child_die
);
12048 /* Read a Fortran module as type. This DIE can be only a declaration used for
12049 imported module. Still we need that type as local Fortran "use ... only"
12050 declaration imports depend on the created type in determine_prefix. */
12052 static struct type
*
12053 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12055 struct objfile
*objfile
= cu
->objfile
;
12059 module_name
= dwarf2_name (die
, cu
);
12061 complaint (&symfile_complaints
,
12062 _("DW_TAG_module has no name, offset 0x%x"),
12063 die
->offset
.sect_off
);
12064 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12066 /* determine_prefix uses TYPE_TAG_NAME. */
12067 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12069 return set_die_type (die
, type
, cu
);
12072 /* Read a Fortran module. */
12075 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12077 struct die_info
*child_die
= die
->child
;
12079 while (child_die
&& child_die
->tag
)
12081 process_die (child_die
, cu
);
12082 child_die
= sibling_die (child_die
);
12086 /* Return the name of the namespace represented by DIE. Set
12087 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12090 static const char *
12091 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12093 struct die_info
*current_die
;
12094 const char *name
= NULL
;
12096 /* Loop through the extensions until we find a name. */
12098 for (current_die
= die
;
12099 current_die
!= NULL
;
12100 current_die
= dwarf2_extension (die
, &cu
))
12102 name
= dwarf2_name (current_die
, cu
);
12107 /* Is it an anonymous namespace? */
12109 *is_anonymous
= (name
== NULL
);
12111 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12116 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12117 the user defined type vector. */
12119 static struct type
*
12120 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12122 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12123 struct comp_unit_head
*cu_header
= &cu
->header
;
12125 struct attribute
*attr_byte_size
;
12126 struct attribute
*attr_address_class
;
12127 int byte_size
, addr_class
;
12128 struct type
*target_type
;
12130 target_type
= die_type (die
, cu
);
12132 /* The die_type call above may have already set the type for this DIE. */
12133 type
= get_die_type (die
, cu
);
12137 type
= lookup_pointer_type (target_type
);
12139 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12140 if (attr_byte_size
)
12141 byte_size
= DW_UNSND (attr_byte_size
);
12143 byte_size
= cu_header
->addr_size
;
12145 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12146 if (attr_address_class
)
12147 addr_class
= DW_UNSND (attr_address_class
);
12149 addr_class
= DW_ADDR_none
;
12151 /* If the pointer size or address class is different than the
12152 default, create a type variant marked as such and set the
12153 length accordingly. */
12154 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12156 if (gdbarch_address_class_type_flags_p (gdbarch
))
12160 type_flags
= gdbarch_address_class_type_flags
12161 (gdbarch
, byte_size
, addr_class
);
12162 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12164 type
= make_type_with_address_space (type
, type_flags
);
12166 else if (TYPE_LENGTH (type
) != byte_size
)
12168 complaint (&symfile_complaints
,
12169 _("invalid pointer size %d"), byte_size
);
12173 /* Should we also complain about unhandled address classes? */
12177 TYPE_LENGTH (type
) = byte_size
;
12178 return set_die_type (die
, type
, cu
);
12181 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12182 the user defined type vector. */
12184 static struct type
*
12185 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12188 struct type
*to_type
;
12189 struct type
*domain
;
12191 to_type
= die_type (die
, cu
);
12192 domain
= die_containing_type (die
, cu
);
12194 /* The calls above may have already set the type for this DIE. */
12195 type
= get_die_type (die
, cu
);
12199 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12200 type
= lookup_methodptr_type (to_type
);
12202 type
= lookup_memberptr_type (to_type
, domain
);
12204 return set_die_type (die
, type
, cu
);
12207 /* Extract all information from a DW_TAG_reference_type DIE and add to
12208 the user defined type vector. */
12210 static struct type
*
12211 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12213 struct comp_unit_head
*cu_header
= &cu
->header
;
12214 struct type
*type
, *target_type
;
12215 struct attribute
*attr
;
12217 target_type
= die_type (die
, cu
);
12219 /* The die_type call above may have already set the type for this DIE. */
12220 type
= get_die_type (die
, cu
);
12224 type
= lookup_reference_type (target_type
);
12225 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12228 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12232 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12234 return set_die_type (die
, type
, cu
);
12237 static struct type
*
12238 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12240 struct type
*base_type
, *cv_type
;
12242 base_type
= die_type (die
, cu
);
12244 /* The die_type call above may have already set the type for this DIE. */
12245 cv_type
= get_die_type (die
, cu
);
12249 /* In case the const qualifier is applied to an array type, the element type
12250 is so qualified, not the array type (section 6.7.3 of C99). */
12251 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12253 struct type
*el_type
, *inner_array
;
12255 base_type
= copy_type (base_type
);
12256 inner_array
= base_type
;
12258 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12260 TYPE_TARGET_TYPE (inner_array
) =
12261 copy_type (TYPE_TARGET_TYPE (inner_array
));
12262 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12265 el_type
= TYPE_TARGET_TYPE (inner_array
);
12266 TYPE_TARGET_TYPE (inner_array
) =
12267 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12269 return set_die_type (die
, base_type
, cu
);
12272 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12273 return set_die_type (die
, cv_type
, cu
);
12276 static struct type
*
12277 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12279 struct type
*base_type
, *cv_type
;
12281 base_type
= die_type (die
, cu
);
12283 /* The die_type call above may have already set the type for this DIE. */
12284 cv_type
= get_die_type (die
, cu
);
12288 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12289 return set_die_type (die
, cv_type
, cu
);
12292 /* Extract all information from a DW_TAG_string_type DIE and add to
12293 the user defined type vector. It isn't really a user defined type,
12294 but it behaves like one, with other DIE's using an AT_user_def_type
12295 attribute to reference it. */
12297 static struct type
*
12298 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12300 struct objfile
*objfile
= cu
->objfile
;
12301 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12302 struct type
*type
, *range_type
, *index_type
, *char_type
;
12303 struct attribute
*attr
;
12304 unsigned int length
;
12306 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12309 length
= DW_UNSND (attr
);
12313 /* Check for the DW_AT_byte_size attribute. */
12314 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12317 length
= DW_UNSND (attr
);
12325 index_type
= objfile_type (objfile
)->builtin_int
;
12326 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12327 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12328 type
= create_string_type (NULL
, char_type
, range_type
);
12330 return set_die_type (die
, type
, cu
);
12333 /* Handle DIES due to C code like:
12337 int (*funcp)(int a, long l);
12341 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12343 static struct type
*
12344 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12346 struct objfile
*objfile
= cu
->objfile
;
12347 struct type
*type
; /* Type that this function returns. */
12348 struct type
*ftype
; /* Function that returns above type. */
12349 struct attribute
*attr
;
12351 type
= die_type (die
, cu
);
12353 /* The die_type call above may have already set the type for this DIE. */
12354 ftype
= get_die_type (die
, cu
);
12358 ftype
= lookup_function_type (type
);
12360 /* All functions in C++, Pascal and Java have prototypes. */
12361 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12362 if ((attr
&& (DW_UNSND (attr
) != 0))
12363 || cu
->language
== language_cplus
12364 || cu
->language
== language_java
12365 || cu
->language
== language_pascal
)
12366 TYPE_PROTOTYPED (ftype
) = 1;
12367 else if (producer_is_realview (cu
->producer
))
12368 /* RealView does not emit DW_AT_prototyped. We can not
12369 distinguish prototyped and unprototyped functions; default to
12370 prototyped, since that is more common in modern code (and
12371 RealView warns about unprototyped functions). */
12372 TYPE_PROTOTYPED (ftype
) = 1;
12374 /* Store the calling convention in the type if it's available in
12375 the subroutine die. Otherwise set the calling convention to
12376 the default value DW_CC_normal. */
12377 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12379 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12380 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12381 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12383 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12385 /* We need to add the subroutine type to the die immediately so
12386 we don't infinitely recurse when dealing with parameters
12387 declared as the same subroutine type. */
12388 set_die_type (die
, ftype
, cu
);
12390 if (die
->child
!= NULL
)
12392 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12393 struct die_info
*child_die
;
12394 int nparams
, iparams
;
12396 /* Count the number of parameters.
12397 FIXME: GDB currently ignores vararg functions, but knows about
12398 vararg member functions. */
12400 child_die
= die
->child
;
12401 while (child_die
&& child_die
->tag
)
12403 if (child_die
->tag
== DW_TAG_formal_parameter
)
12405 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12406 TYPE_VARARGS (ftype
) = 1;
12407 child_die
= sibling_die (child_die
);
12410 /* Allocate storage for parameters and fill them in. */
12411 TYPE_NFIELDS (ftype
) = nparams
;
12412 TYPE_FIELDS (ftype
) = (struct field
*)
12413 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12415 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12416 even if we error out during the parameters reading below. */
12417 for (iparams
= 0; iparams
< nparams
; iparams
++)
12418 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12421 child_die
= die
->child
;
12422 while (child_die
&& child_die
->tag
)
12424 if (child_die
->tag
== DW_TAG_formal_parameter
)
12426 struct type
*arg_type
;
12428 /* DWARF version 2 has no clean way to discern C++
12429 static and non-static member functions. G++ helps
12430 GDB by marking the first parameter for non-static
12431 member functions (which is the this pointer) as
12432 artificial. We pass this information to
12433 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12435 DWARF version 3 added DW_AT_object_pointer, which GCC
12436 4.5 does not yet generate. */
12437 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12439 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12442 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12444 /* GCC/43521: In java, the formal parameter
12445 "this" is sometimes not marked with DW_AT_artificial. */
12446 if (cu
->language
== language_java
)
12448 const char *name
= dwarf2_name (child_die
, cu
);
12450 if (name
&& !strcmp (name
, "this"))
12451 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12454 arg_type
= die_type (child_die
, cu
);
12456 /* RealView does not mark THIS as const, which the testsuite
12457 expects. GCC marks THIS as const in method definitions,
12458 but not in the class specifications (GCC PR 43053). */
12459 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12460 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12463 struct dwarf2_cu
*arg_cu
= cu
;
12464 const char *name
= dwarf2_name (child_die
, cu
);
12466 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12469 /* If the compiler emits this, use it. */
12470 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12473 else if (name
&& strcmp (name
, "this") == 0)
12474 /* Function definitions will have the argument names. */
12476 else if (name
== NULL
&& iparams
== 0)
12477 /* Declarations may not have the names, so like
12478 elsewhere in GDB, assume an artificial first
12479 argument is "this". */
12483 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12487 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12490 child_die
= sibling_die (child_die
);
12497 static struct type
*
12498 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12500 struct objfile
*objfile
= cu
->objfile
;
12501 const char *name
= NULL
;
12502 struct type
*this_type
, *target_type
;
12504 name
= dwarf2_full_name (NULL
, die
, cu
);
12505 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12506 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12507 TYPE_NAME (this_type
) = (char *) name
;
12508 set_die_type (die
, this_type
, cu
);
12509 target_type
= die_type (die
, cu
);
12510 if (target_type
!= this_type
)
12511 TYPE_TARGET_TYPE (this_type
) = target_type
;
12514 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12515 spec and cause infinite loops in GDB. */
12516 complaint (&symfile_complaints
,
12517 _("Self-referential DW_TAG_typedef "
12518 "- DIE at 0x%x [in module %s]"),
12519 die
->offset
.sect_off
, objfile
->name
);
12520 TYPE_TARGET_TYPE (this_type
) = NULL
;
12525 /* Find a representation of a given base type and install
12526 it in the TYPE field of the die. */
12528 static struct type
*
12529 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12531 struct objfile
*objfile
= cu
->objfile
;
12533 struct attribute
*attr
;
12534 int encoding
= 0, size
= 0;
12536 enum type_code code
= TYPE_CODE_INT
;
12537 int type_flags
= 0;
12538 struct type
*target_type
= NULL
;
12540 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12543 encoding
= DW_UNSND (attr
);
12545 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12548 size
= DW_UNSND (attr
);
12550 name
= dwarf2_name (die
, cu
);
12553 complaint (&symfile_complaints
,
12554 _("DW_AT_name missing from DW_TAG_base_type"));
12559 case DW_ATE_address
:
12560 /* Turn DW_ATE_address into a void * pointer. */
12561 code
= TYPE_CODE_PTR
;
12562 type_flags
|= TYPE_FLAG_UNSIGNED
;
12563 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12565 case DW_ATE_boolean
:
12566 code
= TYPE_CODE_BOOL
;
12567 type_flags
|= TYPE_FLAG_UNSIGNED
;
12569 case DW_ATE_complex_float
:
12570 code
= TYPE_CODE_COMPLEX
;
12571 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12573 case DW_ATE_decimal_float
:
12574 code
= TYPE_CODE_DECFLOAT
;
12577 code
= TYPE_CODE_FLT
;
12579 case DW_ATE_signed
:
12581 case DW_ATE_unsigned
:
12582 type_flags
|= TYPE_FLAG_UNSIGNED
;
12583 if (cu
->language
== language_fortran
12585 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12586 code
= TYPE_CODE_CHAR
;
12588 case DW_ATE_signed_char
:
12589 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12590 || cu
->language
== language_pascal
12591 || cu
->language
== language_fortran
)
12592 code
= TYPE_CODE_CHAR
;
12594 case DW_ATE_unsigned_char
:
12595 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12596 || cu
->language
== language_pascal
12597 || cu
->language
== language_fortran
)
12598 code
= TYPE_CODE_CHAR
;
12599 type_flags
|= TYPE_FLAG_UNSIGNED
;
12602 /* We just treat this as an integer and then recognize the
12603 type by name elsewhere. */
12607 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12608 dwarf_type_encoding_name (encoding
));
12612 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12613 TYPE_NAME (type
) = name
;
12614 TYPE_TARGET_TYPE (type
) = target_type
;
12616 if (name
&& strcmp (name
, "char") == 0)
12617 TYPE_NOSIGN (type
) = 1;
12619 return set_die_type (die
, type
, cu
);
12622 /* Read the given DW_AT_subrange DIE. */
12624 static struct type
*
12625 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12627 struct type
*base_type
;
12628 struct type
*range_type
;
12629 struct attribute
*attr
;
12631 int low_default_is_valid
;
12633 LONGEST negative_mask
;
12635 base_type
= die_type (die
, cu
);
12636 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
12637 check_typedef (base_type
);
12639 /* The die_type call above may have already set the type for this DIE. */
12640 range_type
= get_die_type (die
, cu
);
12644 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12645 omitting DW_AT_lower_bound. */
12646 switch (cu
->language
)
12649 case language_cplus
:
12651 low_default_is_valid
= 1;
12653 case language_fortran
:
12655 low_default_is_valid
= 1;
12658 case language_java
:
12659 case language_objc
:
12661 low_default_is_valid
= (cu
->header
.version
>= 4);
12665 case language_pascal
:
12667 low_default_is_valid
= (cu
->header
.version
>= 4);
12671 low_default_is_valid
= 0;
12675 /* FIXME: For variable sized arrays either of these could be
12676 a variable rather than a constant value. We'll allow it,
12677 but we don't know how to handle it. */
12678 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12680 low
= dwarf2_get_attr_constant_value (attr
, low
);
12681 else if (!low_default_is_valid
)
12682 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12683 "- DIE at 0x%x [in module %s]"),
12684 die
->offset
.sect_off
, cu
->objfile
->name
);
12686 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12689 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12691 /* GCC encodes arrays with unspecified or dynamic length
12692 with a DW_FORM_block1 attribute or a reference attribute.
12693 FIXME: GDB does not yet know how to handle dynamic
12694 arrays properly, treat them as arrays with unspecified
12697 FIXME: jimb/2003-09-22: GDB does not really know
12698 how to handle arrays of unspecified length
12699 either; we just represent them as zero-length
12700 arrays. Choose an appropriate upper bound given
12701 the lower bound we've computed above. */
12705 high
= dwarf2_get_attr_constant_value (attr
, 1);
12709 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12712 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12713 high
= low
+ count
- 1;
12717 /* Unspecified array length. */
12722 /* Dwarf-2 specifications explicitly allows to create subrange types
12723 without specifying a base type.
12724 In that case, the base type must be set to the type of
12725 the lower bound, upper bound or count, in that order, if any of these
12726 three attributes references an object that has a type.
12727 If no base type is found, the Dwarf-2 specifications say that
12728 a signed integer type of size equal to the size of an address should
12730 For the following C code: `extern char gdb_int [];'
12731 GCC produces an empty range DIE.
12732 FIXME: muller/2010-05-28: Possible references to object for low bound,
12733 high bound or count are not yet handled by this code. */
12734 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12736 struct objfile
*objfile
= cu
->objfile
;
12737 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12738 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12739 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12741 /* Test "int", "long int", and "long long int" objfile types,
12742 and select the first one having a size above or equal to the
12743 architecture address size. */
12744 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12745 base_type
= int_type
;
12748 int_type
= objfile_type (objfile
)->builtin_long
;
12749 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12750 base_type
= int_type
;
12753 int_type
= objfile_type (objfile
)->builtin_long_long
;
12754 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12755 base_type
= int_type
;
12761 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
12762 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
12763 low
|= negative_mask
;
12764 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
12765 high
|= negative_mask
;
12767 range_type
= create_range_type (NULL
, base_type
, low
, high
);
12769 /* Mark arrays with dynamic length at least as an array of unspecified
12770 length. GDB could check the boundary but before it gets implemented at
12771 least allow accessing the array elements. */
12772 if (attr
&& attr_form_is_block (attr
))
12773 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12775 /* Ada expects an empty array on no boundary attributes. */
12776 if (attr
== NULL
&& cu
->language
!= language_ada
)
12777 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12779 name
= dwarf2_name (die
, cu
);
12781 TYPE_NAME (range_type
) = name
;
12783 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12785 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
12787 set_die_type (die
, range_type
, cu
);
12789 /* set_die_type should be already done. */
12790 set_descriptive_type (range_type
, die
, cu
);
12795 static struct type
*
12796 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12800 /* For now, we only support the C meaning of an unspecified type: void. */
12802 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
12803 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
12805 return set_die_type (die
, type
, cu
);
12808 /* Read a single die and all its descendents. Set the die's sibling
12809 field to NULL; set other fields in the die correctly, and set all
12810 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12811 location of the info_ptr after reading all of those dies. PARENT
12812 is the parent of the die in question. */
12814 static struct die_info
*
12815 read_die_and_children (const struct die_reader_specs
*reader
,
12816 gdb_byte
*info_ptr
,
12817 gdb_byte
**new_info_ptr
,
12818 struct die_info
*parent
)
12820 struct die_info
*die
;
12824 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
12827 *new_info_ptr
= cur_ptr
;
12830 store_in_ref_table (die
, reader
->cu
);
12833 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
12837 *new_info_ptr
= cur_ptr
;
12840 die
->sibling
= NULL
;
12841 die
->parent
= parent
;
12845 /* Read a die, all of its descendents, and all of its siblings; set
12846 all of the fields of all of the dies correctly. Arguments are as
12847 in read_die_and_children. */
12849 static struct die_info
*
12850 read_die_and_siblings (const struct die_reader_specs
*reader
,
12851 gdb_byte
*info_ptr
,
12852 gdb_byte
**new_info_ptr
,
12853 struct die_info
*parent
)
12855 struct die_info
*first_die
, *last_sibling
;
12858 cur_ptr
= info_ptr
;
12859 first_die
= last_sibling
= NULL
;
12863 struct die_info
*die
12864 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12868 *new_info_ptr
= cur_ptr
;
12875 last_sibling
->sibling
= die
;
12877 last_sibling
= die
;
12881 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12883 The caller is responsible for filling in the extra attributes
12884 and updating (*DIEP)->num_attrs.
12885 Set DIEP to point to a newly allocated die with its information,
12886 except for its child, sibling, and parent fields.
12887 Set HAS_CHILDREN to tell whether the die has children or not. */
12890 read_full_die_1 (const struct die_reader_specs
*reader
,
12891 struct die_info
**diep
, gdb_byte
*info_ptr
,
12892 int *has_children
, int num_extra_attrs
)
12894 unsigned int abbrev_number
, bytes_read
, i
;
12895 sect_offset offset
;
12896 struct abbrev_info
*abbrev
;
12897 struct die_info
*die
;
12898 struct dwarf2_cu
*cu
= reader
->cu
;
12899 bfd
*abfd
= reader
->abfd
;
12901 offset
.sect_off
= info_ptr
- reader
->buffer
;
12902 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12903 info_ptr
+= bytes_read
;
12904 if (!abbrev_number
)
12911 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
12913 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
12915 bfd_get_filename (abfd
));
12917 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
12918 die
->offset
= offset
;
12919 die
->tag
= abbrev
->tag
;
12920 die
->abbrev
= abbrev_number
;
12922 /* Make the result usable.
12923 The caller needs to update num_attrs after adding the extra
12925 die
->num_attrs
= abbrev
->num_attrs
;
12927 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12928 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
12932 *has_children
= abbrev
->has_children
;
12936 /* Read a die and all its attributes.
12937 Set DIEP to point to a newly allocated die with its information,
12938 except for its child, sibling, and parent fields.
12939 Set HAS_CHILDREN to tell whether the die has children or not. */
12942 read_full_die (const struct die_reader_specs
*reader
,
12943 struct die_info
**diep
, gdb_byte
*info_ptr
,
12946 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
12949 /* Abbreviation tables.
12951 In DWARF version 2, the description of the debugging information is
12952 stored in a separate .debug_abbrev section. Before we read any
12953 dies from a section we read in all abbreviations and install them
12954 in a hash table. */
12956 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
12958 static struct abbrev_info
*
12959 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
12961 struct abbrev_info
*abbrev
;
12963 abbrev
= (struct abbrev_info
*)
12964 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
12965 memset (abbrev
, 0, sizeof (struct abbrev_info
));
12969 /* Add an abbreviation to the table. */
12972 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
12973 unsigned int abbrev_number
,
12974 struct abbrev_info
*abbrev
)
12976 unsigned int hash_number
;
12978 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12979 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
12980 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
12983 /* Look up an abbrev in the table.
12984 Returns NULL if the abbrev is not found. */
12986 static struct abbrev_info
*
12987 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
12988 unsigned int abbrev_number
)
12990 unsigned int hash_number
;
12991 struct abbrev_info
*abbrev
;
12993 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12994 abbrev
= abbrev_table
->abbrevs
[hash_number
];
12998 if (abbrev
->number
== abbrev_number
)
13000 abbrev
= abbrev
->next
;
13005 /* Read in an abbrev table. */
13007 static struct abbrev_table
*
13008 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13009 sect_offset offset
)
13011 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13012 bfd
*abfd
= section
->asection
->owner
;
13013 struct abbrev_table
*abbrev_table
;
13014 gdb_byte
*abbrev_ptr
;
13015 struct abbrev_info
*cur_abbrev
;
13016 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13017 unsigned int abbrev_form
;
13018 struct attr_abbrev
*cur_attrs
;
13019 unsigned int allocated_attrs
;
13021 abbrev_table
= XMALLOC (struct abbrev_table
);
13022 abbrev_table
->offset
= offset
;
13023 obstack_init (&abbrev_table
->abbrev_obstack
);
13024 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13026 * sizeof (struct abbrev_info
*)));
13027 memset (abbrev_table
->abbrevs
, 0,
13028 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13030 dwarf2_read_section (objfile
, section
);
13031 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13032 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13033 abbrev_ptr
+= bytes_read
;
13035 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13036 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13038 /* Loop until we reach an abbrev number of 0. */
13039 while (abbrev_number
)
13041 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13043 /* read in abbrev header */
13044 cur_abbrev
->number
= abbrev_number
;
13045 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13046 abbrev_ptr
+= bytes_read
;
13047 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13050 /* now read in declarations */
13051 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13052 abbrev_ptr
+= bytes_read
;
13053 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13054 abbrev_ptr
+= bytes_read
;
13055 while (abbrev_name
)
13057 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13059 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13061 = xrealloc (cur_attrs
, (allocated_attrs
13062 * sizeof (struct attr_abbrev
)));
13065 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13066 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13067 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13068 abbrev_ptr
+= bytes_read
;
13069 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13070 abbrev_ptr
+= bytes_read
;
13073 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13074 (cur_abbrev
->num_attrs
13075 * sizeof (struct attr_abbrev
)));
13076 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13077 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13079 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13081 /* Get next abbreviation.
13082 Under Irix6 the abbreviations for a compilation unit are not
13083 always properly terminated with an abbrev number of 0.
13084 Exit loop if we encounter an abbreviation which we have
13085 already read (which means we are about to read the abbreviations
13086 for the next compile unit) or if the end of the abbreviation
13087 table is reached. */
13088 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13090 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13091 abbrev_ptr
+= bytes_read
;
13092 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13097 return abbrev_table
;
13100 /* Free the resources held by ABBREV_TABLE. */
13103 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13105 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13106 xfree (abbrev_table
);
13109 /* Same as abbrev_table_free but as a cleanup.
13110 We pass in a pointer to the pointer to the table so that we can
13111 set the pointer to NULL when we're done. It also simplifies
13112 build_type_unit_groups. */
13115 abbrev_table_free_cleanup (void *table_ptr
)
13117 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13119 if (*abbrev_table_ptr
!= NULL
)
13120 abbrev_table_free (*abbrev_table_ptr
);
13121 *abbrev_table_ptr
= NULL
;
13124 /* Read the abbrev table for CU from ABBREV_SECTION. */
13127 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13128 struct dwarf2_section_info
*abbrev_section
)
13131 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13134 /* Release the memory used by the abbrev table for a compilation unit. */
13137 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13139 struct dwarf2_cu
*cu
= ptr_to_cu
;
13141 abbrev_table_free (cu
->abbrev_table
);
13142 /* Set this to NULL so that we SEGV if we try to read it later,
13143 and also because free_comp_unit verifies this is NULL. */
13144 cu
->abbrev_table
= NULL
;
13147 /* Returns nonzero if TAG represents a type that we might generate a partial
13151 is_type_tag_for_partial (int tag
)
13156 /* Some types that would be reasonable to generate partial symbols for,
13157 that we don't at present. */
13158 case DW_TAG_array_type
:
13159 case DW_TAG_file_type
:
13160 case DW_TAG_ptr_to_member_type
:
13161 case DW_TAG_set_type
:
13162 case DW_TAG_string_type
:
13163 case DW_TAG_subroutine_type
:
13165 case DW_TAG_base_type
:
13166 case DW_TAG_class_type
:
13167 case DW_TAG_interface_type
:
13168 case DW_TAG_enumeration_type
:
13169 case DW_TAG_structure_type
:
13170 case DW_TAG_subrange_type
:
13171 case DW_TAG_typedef
:
13172 case DW_TAG_union_type
:
13179 /* Load all DIEs that are interesting for partial symbols into memory. */
13181 static struct partial_die_info
*
13182 load_partial_dies (const struct die_reader_specs
*reader
,
13183 gdb_byte
*info_ptr
, int building_psymtab
)
13185 struct dwarf2_cu
*cu
= reader
->cu
;
13186 struct objfile
*objfile
= cu
->objfile
;
13187 struct partial_die_info
*part_die
;
13188 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13189 struct abbrev_info
*abbrev
;
13190 unsigned int bytes_read
;
13191 unsigned int load_all
= 0;
13192 int nesting_level
= 1;
13197 gdb_assert (cu
->per_cu
!= NULL
);
13198 if (cu
->per_cu
->load_all_dies
)
13202 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13206 &cu
->comp_unit_obstack
,
13207 hashtab_obstack_allocate
,
13208 dummy_obstack_deallocate
);
13210 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13211 sizeof (struct partial_die_info
));
13215 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13217 /* A NULL abbrev means the end of a series of children. */
13218 if (abbrev
== NULL
)
13220 if (--nesting_level
== 0)
13222 /* PART_DIE was probably the last thing allocated on the
13223 comp_unit_obstack, so we could call obstack_free
13224 here. We don't do that because the waste is small,
13225 and will be cleaned up when we're done with this
13226 compilation unit. This way, we're also more robust
13227 against other users of the comp_unit_obstack. */
13230 info_ptr
+= bytes_read
;
13231 last_die
= parent_die
;
13232 parent_die
= parent_die
->die_parent
;
13236 /* Check for template arguments. We never save these; if
13237 they're seen, we just mark the parent, and go on our way. */
13238 if (parent_die
!= NULL
13239 && cu
->language
== language_cplus
13240 && (abbrev
->tag
== DW_TAG_template_type_param
13241 || abbrev
->tag
== DW_TAG_template_value_param
))
13243 parent_die
->has_template_arguments
= 1;
13247 /* We don't need a partial DIE for the template argument. */
13248 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13253 /* We only recurse into c++ subprograms looking for template arguments.
13254 Skip their other children. */
13256 && cu
->language
== language_cplus
13257 && parent_die
!= NULL
13258 && parent_die
->tag
== DW_TAG_subprogram
)
13260 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13264 /* Check whether this DIE is interesting enough to save. Normally
13265 we would not be interested in members here, but there may be
13266 later variables referencing them via DW_AT_specification (for
13267 static members). */
13269 && !is_type_tag_for_partial (abbrev
->tag
)
13270 && abbrev
->tag
!= DW_TAG_constant
13271 && abbrev
->tag
!= DW_TAG_enumerator
13272 && abbrev
->tag
!= DW_TAG_subprogram
13273 && abbrev
->tag
!= DW_TAG_lexical_block
13274 && abbrev
->tag
!= DW_TAG_variable
13275 && abbrev
->tag
!= DW_TAG_namespace
13276 && abbrev
->tag
!= DW_TAG_module
13277 && abbrev
->tag
!= DW_TAG_member
13278 && abbrev
->tag
!= DW_TAG_imported_unit
)
13280 /* Otherwise we skip to the next sibling, if any. */
13281 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13285 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13288 /* This two-pass algorithm for processing partial symbols has a
13289 high cost in cache pressure. Thus, handle some simple cases
13290 here which cover the majority of C partial symbols. DIEs
13291 which neither have specification tags in them, nor could have
13292 specification tags elsewhere pointing at them, can simply be
13293 processed and discarded.
13295 This segment is also optional; scan_partial_symbols and
13296 add_partial_symbol will handle these DIEs if we chain
13297 them in normally. When compilers which do not emit large
13298 quantities of duplicate debug information are more common,
13299 this code can probably be removed. */
13301 /* Any complete simple types at the top level (pretty much all
13302 of them, for a language without namespaces), can be processed
13304 if (parent_die
== NULL
13305 && part_die
->has_specification
== 0
13306 && part_die
->is_declaration
== 0
13307 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13308 || part_die
->tag
== DW_TAG_base_type
13309 || part_die
->tag
== DW_TAG_subrange_type
))
13311 if (building_psymtab
&& part_die
->name
!= NULL
)
13312 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13313 VAR_DOMAIN
, LOC_TYPEDEF
,
13314 &objfile
->static_psymbols
,
13315 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13316 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13320 /* The exception for DW_TAG_typedef with has_children above is
13321 a workaround of GCC PR debug/47510. In the case of this complaint
13322 type_name_no_tag_or_error will error on such types later.
13324 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13325 it could not find the child DIEs referenced later, this is checked
13326 above. In correct DWARF DW_TAG_typedef should have no children. */
13328 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13329 complaint (&symfile_complaints
,
13330 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13331 "- DIE at 0x%x [in module %s]"),
13332 part_die
->offset
.sect_off
, objfile
->name
);
13334 /* If we're at the second level, and we're an enumerator, and
13335 our parent has no specification (meaning possibly lives in a
13336 namespace elsewhere), then we can add the partial symbol now
13337 instead of queueing it. */
13338 if (part_die
->tag
== DW_TAG_enumerator
13339 && parent_die
!= NULL
13340 && parent_die
->die_parent
== NULL
13341 && parent_die
->tag
== DW_TAG_enumeration_type
13342 && parent_die
->has_specification
== 0)
13344 if (part_die
->name
== NULL
)
13345 complaint (&symfile_complaints
,
13346 _("malformed enumerator DIE ignored"));
13347 else if (building_psymtab
)
13348 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13349 VAR_DOMAIN
, LOC_CONST
,
13350 (cu
->language
== language_cplus
13351 || cu
->language
== language_java
)
13352 ? &objfile
->global_psymbols
13353 : &objfile
->static_psymbols
,
13354 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13356 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13360 /* We'll save this DIE so link it in. */
13361 part_die
->die_parent
= parent_die
;
13362 part_die
->die_sibling
= NULL
;
13363 part_die
->die_child
= NULL
;
13365 if (last_die
&& last_die
== parent_die
)
13366 last_die
->die_child
= part_die
;
13368 last_die
->die_sibling
= part_die
;
13370 last_die
= part_die
;
13372 if (first_die
== NULL
)
13373 first_die
= part_die
;
13375 /* Maybe add the DIE to the hash table. Not all DIEs that we
13376 find interesting need to be in the hash table, because we
13377 also have the parent/sibling/child chains; only those that we
13378 might refer to by offset later during partial symbol reading.
13380 For now this means things that might have be the target of a
13381 DW_AT_specification, DW_AT_abstract_origin, or
13382 DW_AT_extension. DW_AT_extension will refer only to
13383 namespaces; DW_AT_abstract_origin refers to functions (and
13384 many things under the function DIE, but we do not recurse
13385 into function DIEs during partial symbol reading) and
13386 possibly variables as well; DW_AT_specification refers to
13387 declarations. Declarations ought to have the DW_AT_declaration
13388 flag. It happens that GCC forgets to put it in sometimes, but
13389 only for functions, not for types.
13391 Adding more things than necessary to the hash table is harmless
13392 except for the performance cost. Adding too few will result in
13393 wasted time in find_partial_die, when we reread the compilation
13394 unit with load_all_dies set. */
13397 || abbrev
->tag
== DW_TAG_constant
13398 || abbrev
->tag
== DW_TAG_subprogram
13399 || abbrev
->tag
== DW_TAG_variable
13400 || abbrev
->tag
== DW_TAG_namespace
13401 || part_die
->is_declaration
)
13405 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13406 part_die
->offset
.sect_off
, INSERT
);
13410 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13411 sizeof (struct partial_die_info
));
13413 /* For some DIEs we want to follow their children (if any). For C
13414 we have no reason to follow the children of structures; for other
13415 languages we have to, so that we can get at method physnames
13416 to infer fully qualified class names, for DW_AT_specification,
13417 and for C++ template arguments. For C++, we also look one level
13418 inside functions to find template arguments (if the name of the
13419 function does not already contain the template arguments).
13421 For Ada, we need to scan the children of subprograms and lexical
13422 blocks as well because Ada allows the definition of nested
13423 entities that could be interesting for the debugger, such as
13424 nested subprograms for instance. */
13425 if (last_die
->has_children
13427 || last_die
->tag
== DW_TAG_namespace
13428 || last_die
->tag
== DW_TAG_module
13429 || last_die
->tag
== DW_TAG_enumeration_type
13430 || (cu
->language
== language_cplus
13431 && last_die
->tag
== DW_TAG_subprogram
13432 && (last_die
->name
== NULL
13433 || strchr (last_die
->name
, '<') == NULL
))
13434 || (cu
->language
!= language_c
13435 && (last_die
->tag
== DW_TAG_class_type
13436 || last_die
->tag
== DW_TAG_interface_type
13437 || last_die
->tag
== DW_TAG_structure_type
13438 || last_die
->tag
== DW_TAG_union_type
))
13439 || (cu
->language
== language_ada
13440 && (last_die
->tag
== DW_TAG_subprogram
13441 || last_die
->tag
== DW_TAG_lexical_block
))))
13444 parent_die
= last_die
;
13448 /* Otherwise we skip to the next sibling, if any. */
13449 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13451 /* Back to the top, do it again. */
13455 /* Read a minimal amount of information into the minimal die structure. */
13458 read_partial_die (const struct die_reader_specs
*reader
,
13459 struct partial_die_info
*part_die
,
13460 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13461 gdb_byte
*info_ptr
)
13463 struct dwarf2_cu
*cu
= reader
->cu
;
13464 struct objfile
*objfile
= cu
->objfile
;
13465 gdb_byte
*buffer
= reader
->buffer
;
13467 struct attribute attr
;
13468 int has_low_pc_attr
= 0;
13469 int has_high_pc_attr
= 0;
13470 int high_pc_relative
= 0;
13472 memset (part_die
, 0, sizeof (struct partial_die_info
));
13474 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13476 info_ptr
+= abbrev_len
;
13478 if (abbrev
== NULL
)
13481 part_die
->tag
= abbrev
->tag
;
13482 part_die
->has_children
= abbrev
->has_children
;
13484 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13486 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13488 /* Store the data if it is of an attribute we want to keep in a
13489 partial symbol table. */
13493 switch (part_die
->tag
)
13495 case DW_TAG_compile_unit
:
13496 case DW_TAG_partial_unit
:
13497 case DW_TAG_type_unit
:
13498 /* Compilation units have a DW_AT_name that is a filename, not
13499 a source language identifier. */
13500 case DW_TAG_enumeration_type
:
13501 case DW_TAG_enumerator
:
13502 /* These tags always have simple identifiers already; no need
13503 to canonicalize them. */
13504 part_die
->name
= DW_STRING (&attr
);
13508 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13509 &objfile
->objfile_obstack
);
13513 case DW_AT_linkage_name
:
13514 case DW_AT_MIPS_linkage_name
:
13515 /* Note that both forms of linkage name might appear. We
13516 assume they will be the same, and we only store the last
13518 if (cu
->language
== language_ada
)
13519 part_die
->name
= DW_STRING (&attr
);
13520 part_die
->linkage_name
= DW_STRING (&attr
);
13523 has_low_pc_attr
= 1;
13524 part_die
->lowpc
= DW_ADDR (&attr
);
13526 case DW_AT_high_pc
:
13527 has_high_pc_attr
= 1;
13528 if (attr
.form
== DW_FORM_addr
13529 || attr
.form
== DW_FORM_GNU_addr_index
)
13530 part_die
->highpc
= DW_ADDR (&attr
);
13533 high_pc_relative
= 1;
13534 part_die
->highpc
= DW_UNSND (&attr
);
13537 case DW_AT_location
:
13538 /* Support the .debug_loc offsets. */
13539 if (attr_form_is_block (&attr
))
13541 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13543 else if (attr_form_is_section_offset (&attr
))
13545 dwarf2_complex_location_expr_complaint ();
13549 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13550 "partial symbol information");
13553 case DW_AT_external
:
13554 part_die
->is_external
= DW_UNSND (&attr
);
13556 case DW_AT_declaration
:
13557 part_die
->is_declaration
= DW_UNSND (&attr
);
13560 part_die
->has_type
= 1;
13562 case DW_AT_abstract_origin
:
13563 case DW_AT_specification
:
13564 case DW_AT_extension
:
13565 part_die
->has_specification
= 1;
13566 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13567 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13568 || cu
->per_cu
->is_dwz
);
13570 case DW_AT_sibling
:
13571 /* Ignore absolute siblings, they might point outside of
13572 the current compile unit. */
13573 if (attr
.form
== DW_FORM_ref_addr
)
13574 complaint (&symfile_complaints
,
13575 _("ignoring absolute DW_AT_sibling"));
13577 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13579 case DW_AT_byte_size
:
13580 part_die
->has_byte_size
= 1;
13582 case DW_AT_calling_convention
:
13583 /* DWARF doesn't provide a way to identify a program's source-level
13584 entry point. DW_AT_calling_convention attributes are only meant
13585 to describe functions' calling conventions.
13587 However, because it's a necessary piece of information in
13588 Fortran, and because DW_CC_program is the only piece of debugging
13589 information whose definition refers to a 'main program' at all,
13590 several compilers have begun marking Fortran main programs with
13591 DW_CC_program --- even when those functions use the standard
13592 calling conventions.
13594 So until DWARF specifies a way to provide this information and
13595 compilers pick up the new representation, we'll support this
13597 if (DW_UNSND (&attr
) == DW_CC_program
13598 && cu
->language
== language_fortran
)
13600 set_main_name (part_die
->name
);
13602 /* As this DIE has a static linkage the name would be difficult
13603 to look up later. */
13604 language_of_main
= language_fortran
;
13608 if (DW_UNSND (&attr
) == DW_INL_inlined
13609 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13610 part_die
->may_be_inlined
= 1;
13614 if (part_die
->tag
== DW_TAG_imported_unit
)
13616 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13617 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13618 || cu
->per_cu
->is_dwz
);
13627 if (high_pc_relative
)
13628 part_die
->highpc
+= part_die
->lowpc
;
13630 if (has_low_pc_attr
&& has_high_pc_attr
)
13632 /* When using the GNU linker, .gnu.linkonce. sections are used to
13633 eliminate duplicate copies of functions and vtables and such.
13634 The linker will arbitrarily choose one and discard the others.
13635 The AT_*_pc values for such functions refer to local labels in
13636 these sections. If the section from that file was discarded, the
13637 labels are not in the output, so the relocs get a value of 0.
13638 If this is a discarded function, mark the pc bounds as invalid,
13639 so that GDB will ignore it. */
13640 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13642 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13644 complaint (&symfile_complaints
,
13645 _("DW_AT_low_pc %s is zero "
13646 "for DIE at 0x%x [in module %s]"),
13647 paddress (gdbarch
, part_die
->lowpc
),
13648 part_die
->offset
.sect_off
, objfile
->name
);
13650 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13651 else if (part_die
->lowpc
>= part_die
->highpc
)
13653 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13655 complaint (&symfile_complaints
,
13656 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13657 "for DIE at 0x%x [in module %s]"),
13658 paddress (gdbarch
, part_die
->lowpc
),
13659 paddress (gdbarch
, part_die
->highpc
),
13660 part_die
->offset
.sect_off
, objfile
->name
);
13663 part_die
->has_pc_info
= 1;
13669 /* Find a cached partial DIE at OFFSET in CU. */
13671 static struct partial_die_info
*
13672 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13674 struct partial_die_info
*lookup_die
= NULL
;
13675 struct partial_die_info part_die
;
13677 part_die
.offset
= offset
;
13678 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13684 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13685 except in the case of .debug_types DIEs which do not reference
13686 outside their CU (they do however referencing other types via
13687 DW_FORM_ref_sig8). */
13689 static struct partial_die_info
*
13690 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13692 struct objfile
*objfile
= cu
->objfile
;
13693 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13694 struct partial_die_info
*pd
= NULL
;
13696 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13697 && offset_in_cu_p (&cu
->header
, offset
))
13699 pd
= find_partial_die_in_comp_unit (offset
, cu
);
13702 /* We missed recording what we needed.
13703 Load all dies and try again. */
13704 per_cu
= cu
->per_cu
;
13708 /* TUs don't reference other CUs/TUs (except via type signatures). */
13709 if (cu
->per_cu
->is_debug_types
)
13711 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13712 " external reference to offset 0x%lx [in module %s].\n"),
13713 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
13714 bfd_get_filename (objfile
->obfd
));
13716 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
13719 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
13720 load_partial_comp_unit (per_cu
);
13722 per_cu
->cu
->last_used
= 0;
13723 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13726 /* If we didn't find it, and not all dies have been loaded,
13727 load them all and try again. */
13729 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
13731 per_cu
->load_all_dies
= 1;
13733 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13734 THIS_CU->cu may already be in use. So we can't just free it and
13735 replace its DIEs with the ones we read in. Instead, we leave those
13736 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13737 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13739 load_partial_comp_unit (per_cu
);
13741 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13745 internal_error (__FILE__
, __LINE__
,
13746 _("could not find partial DIE 0x%x "
13747 "in cache [from module %s]\n"),
13748 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
13752 /* See if we can figure out if the class lives in a namespace. We do
13753 this by looking for a member function; its demangled name will
13754 contain namespace info, if there is any. */
13757 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
13758 struct dwarf2_cu
*cu
)
13760 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13761 what template types look like, because the demangler
13762 frequently doesn't give the same name as the debug info. We
13763 could fix this by only using the demangled name to get the
13764 prefix (but see comment in read_structure_type). */
13766 struct partial_die_info
*real_pdi
;
13767 struct partial_die_info
*child_pdi
;
13769 /* If this DIE (this DIE's specification, if any) has a parent, then
13770 we should not do this. We'll prepend the parent's fully qualified
13771 name when we create the partial symbol. */
13773 real_pdi
= struct_pdi
;
13774 while (real_pdi
->has_specification
)
13775 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
13776 real_pdi
->spec_is_dwz
, cu
);
13778 if (real_pdi
->die_parent
!= NULL
)
13781 for (child_pdi
= struct_pdi
->die_child
;
13783 child_pdi
= child_pdi
->die_sibling
)
13785 if (child_pdi
->tag
== DW_TAG_subprogram
13786 && child_pdi
->linkage_name
!= NULL
)
13788 char *actual_class_name
13789 = language_class_name_from_physname (cu
->language_defn
,
13790 child_pdi
->linkage_name
);
13791 if (actual_class_name
!= NULL
)
13794 = obsavestring (actual_class_name
,
13795 strlen (actual_class_name
),
13796 &cu
->objfile
->objfile_obstack
);
13797 xfree (actual_class_name
);
13804 /* Adjust PART_DIE before generating a symbol for it. This function
13805 may set the is_external flag or change the DIE's name. */
13808 fixup_partial_die (struct partial_die_info
*part_die
,
13809 struct dwarf2_cu
*cu
)
13811 /* Once we've fixed up a die, there's no point in doing so again.
13812 This also avoids a memory leak if we were to call
13813 guess_partial_die_structure_name multiple times. */
13814 if (part_die
->fixup_called
)
13817 /* If we found a reference attribute and the DIE has no name, try
13818 to find a name in the referred to DIE. */
13820 if (part_die
->name
== NULL
&& part_die
->has_specification
)
13822 struct partial_die_info
*spec_die
;
13824 spec_die
= find_partial_die (part_die
->spec_offset
,
13825 part_die
->spec_is_dwz
, cu
);
13827 fixup_partial_die (spec_die
, cu
);
13829 if (spec_die
->name
)
13831 part_die
->name
= spec_die
->name
;
13833 /* Copy DW_AT_external attribute if it is set. */
13834 if (spec_die
->is_external
)
13835 part_die
->is_external
= spec_die
->is_external
;
13839 /* Set default names for some unnamed DIEs. */
13841 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
13842 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
13844 /* If there is no parent die to provide a namespace, and there are
13845 children, see if we can determine the namespace from their linkage
13847 if (cu
->language
== language_cplus
13848 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
13849 && part_die
->die_parent
== NULL
13850 && part_die
->has_children
13851 && (part_die
->tag
== DW_TAG_class_type
13852 || part_die
->tag
== DW_TAG_structure_type
13853 || part_die
->tag
== DW_TAG_union_type
))
13854 guess_partial_die_structure_name (part_die
, cu
);
13856 /* GCC might emit a nameless struct or union that has a linkage
13857 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13858 if (part_die
->name
== NULL
13859 && (part_die
->tag
== DW_TAG_class_type
13860 || part_die
->tag
== DW_TAG_interface_type
13861 || part_die
->tag
== DW_TAG_structure_type
13862 || part_die
->tag
== DW_TAG_union_type
)
13863 && part_die
->linkage_name
!= NULL
)
13867 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13872 /* Strip any leading namespaces/classes, keep only the base name.
13873 DW_AT_name for named DIEs does not contain the prefixes. */
13874 base
= strrchr (demangled
, ':');
13875 if (base
&& base
> demangled
&& base
[-1] == ':')
13880 part_die
->name
= obsavestring (base
, strlen (base
),
13881 &cu
->objfile
->objfile_obstack
);
13886 part_die
->fixup_called
= 1;
13889 /* Read an attribute value described by an attribute form. */
13892 read_attribute_value (const struct die_reader_specs
*reader
,
13893 struct attribute
*attr
, unsigned form
,
13894 gdb_byte
*info_ptr
)
13896 struct dwarf2_cu
*cu
= reader
->cu
;
13897 bfd
*abfd
= reader
->abfd
;
13898 struct comp_unit_head
*cu_header
= &cu
->header
;
13899 unsigned int bytes_read
;
13900 struct dwarf_block
*blk
;
13905 case DW_FORM_ref_addr
:
13906 if (cu
->header
.version
== 2)
13907 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13909 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
13910 &cu
->header
, &bytes_read
);
13911 info_ptr
+= bytes_read
;
13913 case DW_FORM_GNU_ref_alt
:
13914 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13915 info_ptr
+= bytes_read
;
13918 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13919 info_ptr
+= bytes_read
;
13921 case DW_FORM_block2
:
13922 blk
= dwarf_alloc_block (cu
);
13923 blk
->size
= read_2_bytes (abfd
, info_ptr
);
13925 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13926 info_ptr
+= blk
->size
;
13927 DW_BLOCK (attr
) = blk
;
13929 case DW_FORM_block4
:
13930 blk
= dwarf_alloc_block (cu
);
13931 blk
->size
= read_4_bytes (abfd
, info_ptr
);
13933 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13934 info_ptr
+= blk
->size
;
13935 DW_BLOCK (attr
) = blk
;
13937 case DW_FORM_data2
:
13938 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
13941 case DW_FORM_data4
:
13942 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
13945 case DW_FORM_data8
:
13946 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
13949 case DW_FORM_sec_offset
:
13950 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13951 info_ptr
+= bytes_read
;
13953 case DW_FORM_string
:
13954 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
13955 DW_STRING_IS_CANONICAL (attr
) = 0;
13956 info_ptr
+= bytes_read
;
13959 if (!cu
->per_cu
->is_dwz
)
13961 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
13963 DW_STRING_IS_CANONICAL (attr
) = 0;
13964 info_ptr
+= bytes_read
;
13968 case DW_FORM_GNU_strp_alt
:
13970 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
13971 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
13974 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
13975 DW_STRING_IS_CANONICAL (attr
) = 0;
13976 info_ptr
+= bytes_read
;
13979 case DW_FORM_exprloc
:
13980 case DW_FORM_block
:
13981 blk
= dwarf_alloc_block (cu
);
13982 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13983 info_ptr
+= bytes_read
;
13984 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13985 info_ptr
+= blk
->size
;
13986 DW_BLOCK (attr
) = blk
;
13988 case DW_FORM_block1
:
13989 blk
= dwarf_alloc_block (cu
);
13990 blk
->size
= read_1_byte (abfd
, info_ptr
);
13992 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13993 info_ptr
+= blk
->size
;
13994 DW_BLOCK (attr
) = blk
;
13996 case DW_FORM_data1
:
13997 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14001 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14004 case DW_FORM_flag_present
:
14005 DW_UNSND (attr
) = 1;
14007 case DW_FORM_sdata
:
14008 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14009 info_ptr
+= bytes_read
;
14011 case DW_FORM_udata
:
14012 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14013 info_ptr
+= bytes_read
;
14016 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14017 + read_1_byte (abfd
, info_ptr
));
14021 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14022 + read_2_bytes (abfd
, info_ptr
));
14026 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14027 + read_4_bytes (abfd
, info_ptr
));
14031 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14032 + read_8_bytes (abfd
, info_ptr
));
14035 case DW_FORM_ref_sig8
:
14036 /* Convert the signature to something we can record in DW_UNSND
14038 NOTE: This is NULL if the type wasn't found. */
14039 DW_SIGNATURED_TYPE (attr
) =
14040 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
14043 case DW_FORM_ref_udata
:
14044 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14045 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14046 info_ptr
+= bytes_read
;
14048 case DW_FORM_indirect
:
14049 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14050 info_ptr
+= bytes_read
;
14051 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14053 case DW_FORM_GNU_addr_index
:
14054 if (reader
->dwo_file
== NULL
)
14056 /* For now flag a hard error.
14057 Later we can turn this into a complaint. */
14058 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14059 dwarf_form_name (form
),
14060 bfd_get_filename (abfd
));
14062 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14063 info_ptr
+= bytes_read
;
14065 case DW_FORM_GNU_str_index
:
14066 if (reader
->dwo_file
== NULL
)
14068 /* For now flag a hard error.
14069 Later we can turn this into a complaint if warranted. */
14070 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14071 dwarf_form_name (form
),
14072 bfd_get_filename (abfd
));
14075 ULONGEST str_index
=
14076 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14078 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14079 DW_STRING_IS_CANONICAL (attr
) = 0;
14080 info_ptr
+= bytes_read
;
14084 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14085 dwarf_form_name (form
),
14086 bfd_get_filename (abfd
));
14090 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14091 attr
->form
= DW_FORM_GNU_ref_alt
;
14093 /* We have seen instances where the compiler tried to emit a byte
14094 size attribute of -1 which ended up being encoded as an unsigned
14095 0xffffffff. Although 0xffffffff is technically a valid size value,
14096 an object of this size seems pretty unlikely so we can relatively
14097 safely treat these cases as if the size attribute was invalid and
14098 treat them as zero by default. */
14099 if (attr
->name
== DW_AT_byte_size
14100 && form
== DW_FORM_data4
14101 && DW_UNSND (attr
) >= 0xffffffff)
14104 (&symfile_complaints
,
14105 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14106 hex_string (DW_UNSND (attr
)));
14107 DW_UNSND (attr
) = 0;
14113 /* Read an attribute described by an abbreviated attribute. */
14116 read_attribute (const struct die_reader_specs
*reader
,
14117 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14118 gdb_byte
*info_ptr
)
14120 attr
->name
= abbrev
->name
;
14121 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14124 /* Read dwarf information from a buffer. */
14126 static unsigned int
14127 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14129 return bfd_get_8 (abfd
, buf
);
14133 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14135 return bfd_get_signed_8 (abfd
, buf
);
14138 static unsigned int
14139 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14141 return bfd_get_16 (abfd
, buf
);
14145 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14147 return bfd_get_signed_16 (abfd
, buf
);
14150 static unsigned int
14151 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14153 return bfd_get_32 (abfd
, buf
);
14157 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14159 return bfd_get_signed_32 (abfd
, buf
);
14163 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14165 return bfd_get_64 (abfd
, buf
);
14169 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14170 unsigned int *bytes_read
)
14172 struct comp_unit_head
*cu_header
= &cu
->header
;
14173 CORE_ADDR retval
= 0;
14175 if (cu_header
->signed_addr_p
)
14177 switch (cu_header
->addr_size
)
14180 retval
= bfd_get_signed_16 (abfd
, buf
);
14183 retval
= bfd_get_signed_32 (abfd
, buf
);
14186 retval
= bfd_get_signed_64 (abfd
, buf
);
14189 internal_error (__FILE__
, __LINE__
,
14190 _("read_address: bad switch, signed [in module %s]"),
14191 bfd_get_filename (abfd
));
14196 switch (cu_header
->addr_size
)
14199 retval
= bfd_get_16 (abfd
, buf
);
14202 retval
= bfd_get_32 (abfd
, buf
);
14205 retval
= bfd_get_64 (abfd
, buf
);
14208 internal_error (__FILE__
, __LINE__
,
14209 _("read_address: bad switch, "
14210 "unsigned [in module %s]"),
14211 bfd_get_filename (abfd
));
14215 *bytes_read
= cu_header
->addr_size
;
14219 /* Read the initial length from a section. The (draft) DWARF 3
14220 specification allows the initial length to take up either 4 bytes
14221 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14222 bytes describe the length and all offsets will be 8 bytes in length
14225 An older, non-standard 64-bit format is also handled by this
14226 function. The older format in question stores the initial length
14227 as an 8-byte quantity without an escape value. Lengths greater
14228 than 2^32 aren't very common which means that the initial 4 bytes
14229 is almost always zero. Since a length value of zero doesn't make
14230 sense for the 32-bit format, this initial zero can be considered to
14231 be an escape value which indicates the presence of the older 64-bit
14232 format. As written, the code can't detect (old format) lengths
14233 greater than 4GB. If it becomes necessary to handle lengths
14234 somewhat larger than 4GB, we could allow other small values (such
14235 as the non-sensical values of 1, 2, and 3) to also be used as
14236 escape values indicating the presence of the old format.
14238 The value returned via bytes_read should be used to increment the
14239 relevant pointer after calling read_initial_length().
14241 [ Note: read_initial_length() and read_offset() are based on the
14242 document entitled "DWARF Debugging Information Format", revision
14243 3, draft 8, dated November 19, 2001. This document was obtained
14246 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14248 This document is only a draft and is subject to change. (So beware.)
14250 Details regarding the older, non-standard 64-bit format were
14251 determined empirically by examining 64-bit ELF files produced by
14252 the SGI toolchain on an IRIX 6.5 machine.
14254 - Kevin, July 16, 2002
14258 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
14260 LONGEST length
= bfd_get_32 (abfd
, buf
);
14262 if (length
== 0xffffffff)
14264 length
= bfd_get_64 (abfd
, buf
+ 4);
14267 else if (length
== 0)
14269 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14270 length
= bfd_get_64 (abfd
, buf
);
14281 /* Cover function for read_initial_length.
14282 Returns the length of the object at BUF, and stores the size of the
14283 initial length in *BYTES_READ and stores the size that offsets will be in
14285 If the initial length size is not equivalent to that specified in
14286 CU_HEADER then issue a complaint.
14287 This is useful when reading non-comp-unit headers. */
14290 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
14291 const struct comp_unit_head
*cu_header
,
14292 unsigned int *bytes_read
,
14293 unsigned int *offset_size
)
14295 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14297 gdb_assert (cu_header
->initial_length_size
== 4
14298 || cu_header
->initial_length_size
== 8
14299 || cu_header
->initial_length_size
== 12);
14301 if (cu_header
->initial_length_size
!= *bytes_read
)
14302 complaint (&symfile_complaints
,
14303 _("intermixed 32-bit and 64-bit DWARF sections"));
14305 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14309 /* Read an offset from the data stream. The size of the offset is
14310 given by cu_header->offset_size. */
14313 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
14314 unsigned int *bytes_read
)
14316 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14318 *bytes_read
= cu_header
->offset_size
;
14322 /* Read an offset from the data stream. */
14325 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
14327 LONGEST retval
= 0;
14329 switch (offset_size
)
14332 retval
= bfd_get_32 (abfd
, buf
);
14335 retval
= bfd_get_64 (abfd
, buf
);
14338 internal_error (__FILE__
, __LINE__
,
14339 _("read_offset_1: bad switch [in module %s]"),
14340 bfd_get_filename (abfd
));
14347 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
14349 /* If the size of a host char is 8 bits, we can return a pointer
14350 to the buffer, otherwise we have to copy the data to a buffer
14351 allocated on the temporary obstack. */
14352 gdb_assert (HOST_CHAR_BIT
== 8);
14357 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14359 /* If the size of a host char is 8 bits, we can return a pointer
14360 to the string, otherwise we have to copy the string to a buffer
14361 allocated on the temporary obstack. */
14362 gdb_assert (HOST_CHAR_BIT
== 8);
14365 *bytes_read_ptr
= 1;
14368 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
14369 return (char *) buf
;
14373 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14375 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14376 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14377 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14378 bfd_get_filename (abfd
));
14379 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14380 error (_("DW_FORM_strp pointing outside of "
14381 ".debug_str section [in module %s]"),
14382 bfd_get_filename (abfd
));
14383 gdb_assert (HOST_CHAR_BIT
== 8);
14384 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14386 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14389 /* Read a string at offset STR_OFFSET in the .debug_str section from
14390 the .dwz file DWZ. Throw an error if the offset is too large. If
14391 the string consists of a single NUL byte, return NULL; otherwise
14392 return a pointer to the string. */
14395 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14397 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14399 if (dwz
->str
.buffer
== NULL
)
14400 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14401 "section [in module %s]"),
14402 bfd_get_filename (dwz
->dwz_bfd
));
14403 if (str_offset
>= dwz
->str
.size
)
14404 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14405 ".debug_str section [in module %s]"),
14406 bfd_get_filename (dwz
->dwz_bfd
));
14407 gdb_assert (HOST_CHAR_BIT
== 8);
14408 if (dwz
->str
.buffer
[str_offset
] == '\0')
14410 return (char *) (dwz
->str
.buffer
+ str_offset
);
14414 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
14415 const struct comp_unit_head
*cu_header
,
14416 unsigned int *bytes_read_ptr
)
14418 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14420 return read_indirect_string_at_offset (abfd
, str_offset
);
14424 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14427 unsigned int num_read
;
14429 unsigned char byte
;
14437 byte
= bfd_get_8 (abfd
, buf
);
14440 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14441 if ((byte
& 128) == 0)
14447 *bytes_read_ptr
= num_read
;
14452 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14455 int i
, shift
, num_read
;
14456 unsigned char byte
;
14464 byte
= bfd_get_8 (abfd
, buf
);
14467 result
|= ((LONGEST
) (byte
& 127) << shift
);
14469 if ((byte
& 128) == 0)
14474 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14475 result
|= -(((LONGEST
) 1) << shift
);
14476 *bytes_read_ptr
= num_read
;
14480 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14481 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14482 ADDR_SIZE is the size of addresses from the CU header. */
14485 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14487 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14488 bfd
*abfd
= objfile
->obfd
;
14489 const gdb_byte
*info_ptr
;
14491 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14492 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14493 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14495 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14496 error (_("DW_FORM_addr_index pointing outside of "
14497 ".debug_addr section [in module %s]"),
14499 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14500 + addr_base
+ addr_index
* addr_size
);
14501 if (addr_size
== 4)
14502 return bfd_get_32 (abfd
, info_ptr
);
14504 return bfd_get_64 (abfd
, info_ptr
);
14507 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14510 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14512 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14515 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14518 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
14519 unsigned int *bytes_read
)
14521 bfd
*abfd
= cu
->objfile
->obfd
;
14522 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14524 return read_addr_index (cu
, addr_index
);
14527 /* Data structure to pass results from dwarf2_read_addr_index_reader
14528 back to dwarf2_read_addr_index. */
14530 struct dwarf2_read_addr_index_data
14532 ULONGEST addr_base
;
14536 /* die_reader_func for dwarf2_read_addr_index. */
14539 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14540 gdb_byte
*info_ptr
,
14541 struct die_info
*comp_unit_die
,
14545 struct dwarf2_cu
*cu
= reader
->cu
;
14546 struct dwarf2_read_addr_index_data
*aidata
=
14547 (struct dwarf2_read_addr_index_data
*) data
;
14549 aidata
->addr_base
= cu
->addr_base
;
14550 aidata
->addr_size
= cu
->header
.addr_size
;
14553 /* Given an index in .debug_addr, fetch the value.
14554 NOTE: This can be called during dwarf expression evaluation,
14555 long after the debug information has been read, and thus per_cu->cu
14556 may no longer exist. */
14559 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14560 unsigned int addr_index
)
14562 struct objfile
*objfile
= per_cu
->objfile
;
14563 struct dwarf2_cu
*cu
= per_cu
->cu
;
14564 ULONGEST addr_base
;
14567 /* This is intended to be called from outside this file. */
14568 dw2_setup (objfile
);
14570 /* We need addr_base and addr_size.
14571 If we don't have PER_CU->cu, we have to get it.
14572 Nasty, but the alternative is storing the needed info in PER_CU,
14573 which at this point doesn't seem justified: it's not clear how frequently
14574 it would get used and it would increase the size of every PER_CU.
14575 Entry points like dwarf2_per_cu_addr_size do a similar thing
14576 so we're not in uncharted territory here.
14577 Alas we need to be a bit more complicated as addr_base is contained
14580 We don't need to read the entire CU(/TU).
14581 We just need the header and top level die.
14583 IWBN to use the aging mechanism to let us lazily later discard the CU.
14584 For now we skip this optimization. */
14588 addr_base
= cu
->addr_base
;
14589 addr_size
= cu
->header
.addr_size
;
14593 struct dwarf2_read_addr_index_data aidata
;
14595 /* Note: We can't use init_cutu_and_read_dies_simple here,
14596 we need addr_base. */
14597 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14598 dwarf2_read_addr_index_reader
, &aidata
);
14599 addr_base
= aidata
.addr_base
;
14600 addr_size
= aidata
.addr_size
;
14603 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14606 /* Given a DW_AT_str_index, fetch the string. */
14609 read_str_index (const struct die_reader_specs
*reader
,
14610 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14612 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14613 const char *dwo_name
= objfile
->name
;
14614 bfd
*abfd
= objfile
->obfd
;
14615 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14616 gdb_byte
*info_ptr
;
14617 ULONGEST str_offset
;
14619 dwarf2_read_section (objfile
, §ions
->str
);
14620 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14621 if (sections
->str
.buffer
== NULL
)
14622 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14623 " in CU at offset 0x%lx [in module %s]"),
14624 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14625 if (sections
->str_offsets
.buffer
== NULL
)
14626 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14627 " in CU at offset 0x%lx [in module %s]"),
14628 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14629 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14630 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14631 " section in CU at offset 0x%lx [in module %s]"),
14632 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14633 info_ptr
= (sections
->str_offsets
.buffer
14634 + str_index
* cu
->header
.offset_size
);
14635 if (cu
->header
.offset_size
== 4)
14636 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14638 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14639 if (str_offset
>= sections
->str
.size
)
14640 error (_("Offset from DW_FORM_str_index pointing outside of"
14641 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14642 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14643 return (char *) (sections
->str
.buffer
+ str_offset
);
14646 /* Return the length of an LEB128 number in BUF. */
14649 leb128_size (const gdb_byte
*buf
)
14651 const gdb_byte
*begin
= buf
;
14657 if ((byte
& 128) == 0)
14658 return buf
- begin
;
14663 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14670 cu
->language
= language_c
;
14672 case DW_LANG_C_plus_plus
:
14673 cu
->language
= language_cplus
;
14676 cu
->language
= language_d
;
14678 case DW_LANG_Fortran77
:
14679 case DW_LANG_Fortran90
:
14680 case DW_LANG_Fortran95
:
14681 cu
->language
= language_fortran
;
14684 cu
->language
= language_go
;
14686 case DW_LANG_Mips_Assembler
:
14687 cu
->language
= language_asm
;
14690 cu
->language
= language_java
;
14692 case DW_LANG_Ada83
:
14693 case DW_LANG_Ada95
:
14694 cu
->language
= language_ada
;
14696 case DW_LANG_Modula2
:
14697 cu
->language
= language_m2
;
14699 case DW_LANG_Pascal83
:
14700 cu
->language
= language_pascal
;
14703 cu
->language
= language_objc
;
14705 case DW_LANG_Cobol74
:
14706 case DW_LANG_Cobol85
:
14708 cu
->language
= language_minimal
;
14711 cu
->language_defn
= language_def (cu
->language
);
14714 /* Return the named attribute or NULL if not there. */
14716 static struct attribute
*
14717 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
14722 struct attribute
*spec
= NULL
;
14724 for (i
= 0; i
< die
->num_attrs
; ++i
)
14726 if (die
->attrs
[i
].name
== name
)
14727 return &die
->attrs
[i
];
14728 if (die
->attrs
[i
].name
== DW_AT_specification
14729 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
14730 spec
= &die
->attrs
[i
];
14736 die
= follow_die_ref (die
, spec
, &cu
);
14742 /* Return the named attribute or NULL if not there,
14743 but do not follow DW_AT_specification, etc.
14744 This is for use in contexts where we're reading .debug_types dies.
14745 Following DW_AT_specification, DW_AT_abstract_origin will take us
14746 back up the chain, and we want to go down. */
14748 static struct attribute
*
14749 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
14753 for (i
= 0; i
< die
->num_attrs
; ++i
)
14754 if (die
->attrs
[i
].name
== name
)
14755 return &die
->attrs
[i
];
14760 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14761 and holds a non-zero value. This function should only be used for
14762 DW_FORM_flag or DW_FORM_flag_present attributes. */
14765 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
14767 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
14769 return (attr
&& DW_UNSND (attr
));
14773 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
14775 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14776 which value is non-zero. However, we have to be careful with
14777 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14778 (via dwarf2_flag_true_p) follows this attribute. So we may
14779 end up accidently finding a declaration attribute that belongs
14780 to a different DIE referenced by the specification attribute,
14781 even though the given DIE does not have a declaration attribute. */
14782 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
14783 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
14786 /* Return the die giving the specification for DIE, if there is
14787 one. *SPEC_CU is the CU containing DIE on input, and the CU
14788 containing the return value on output. If there is no
14789 specification, but there is an abstract origin, that is
14792 static struct die_info
*
14793 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
14795 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
14798 if (spec_attr
== NULL
)
14799 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
14801 if (spec_attr
== NULL
)
14804 return follow_die_ref (die
, spec_attr
, spec_cu
);
14807 /* Free the line_header structure *LH, and any arrays and strings it
14809 NOTE: This is also used as a "cleanup" function. */
14812 free_line_header (struct line_header
*lh
)
14814 if (lh
->standard_opcode_lengths
)
14815 xfree (lh
->standard_opcode_lengths
);
14817 /* Remember that all the lh->file_names[i].name pointers are
14818 pointers into debug_line_buffer, and don't need to be freed. */
14819 if (lh
->file_names
)
14820 xfree (lh
->file_names
);
14822 /* Similarly for the include directory names. */
14823 if (lh
->include_dirs
)
14824 xfree (lh
->include_dirs
);
14829 /* Add an entry to LH's include directory table. */
14832 add_include_dir (struct line_header
*lh
, char *include_dir
)
14834 /* Grow the array if necessary. */
14835 if (lh
->include_dirs_size
== 0)
14837 lh
->include_dirs_size
= 1; /* for testing */
14838 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
14839 * sizeof (*lh
->include_dirs
));
14841 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
14843 lh
->include_dirs_size
*= 2;
14844 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
14845 (lh
->include_dirs_size
14846 * sizeof (*lh
->include_dirs
)));
14849 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
14852 /* Add an entry to LH's file name table. */
14855 add_file_name (struct line_header
*lh
,
14857 unsigned int dir_index
,
14858 unsigned int mod_time
,
14859 unsigned int length
)
14861 struct file_entry
*fe
;
14863 /* Grow the array if necessary. */
14864 if (lh
->file_names_size
== 0)
14866 lh
->file_names_size
= 1; /* for testing */
14867 lh
->file_names
= xmalloc (lh
->file_names_size
14868 * sizeof (*lh
->file_names
));
14870 else if (lh
->num_file_names
>= lh
->file_names_size
)
14872 lh
->file_names_size
*= 2;
14873 lh
->file_names
= xrealloc (lh
->file_names
,
14874 (lh
->file_names_size
14875 * sizeof (*lh
->file_names
)));
14878 fe
= &lh
->file_names
[lh
->num_file_names
++];
14880 fe
->dir_index
= dir_index
;
14881 fe
->mod_time
= mod_time
;
14882 fe
->length
= length
;
14883 fe
->included_p
= 0;
14887 /* A convenience function to find the proper .debug_line section for a
14890 static struct dwarf2_section_info
*
14891 get_debug_line_section (struct dwarf2_cu
*cu
)
14893 struct dwarf2_section_info
*section
;
14895 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14897 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14898 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14899 else if (cu
->per_cu
->is_dwz
)
14901 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14903 section
= &dwz
->line
;
14906 section
= &dwarf2_per_objfile
->line
;
14911 /* Read the statement program header starting at OFFSET in
14912 .debug_line, or .debug_line.dwo. Return a pointer
14913 to a struct line_header, allocated using xmalloc.
14915 NOTE: the strings in the include directory and file name tables of
14916 the returned object point into the dwarf line section buffer,
14917 and must not be freed. */
14919 static struct line_header
*
14920 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
14922 struct cleanup
*back_to
;
14923 struct line_header
*lh
;
14924 gdb_byte
*line_ptr
;
14925 unsigned int bytes_read
, offset_size
;
14927 char *cur_dir
, *cur_file
;
14928 struct dwarf2_section_info
*section
;
14931 section
= get_debug_line_section (cu
);
14932 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
14933 if (section
->buffer
== NULL
)
14935 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14936 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
14938 complaint (&symfile_complaints
, _("missing .debug_line section"));
14942 /* We can't do this until we know the section is non-empty.
14943 Only then do we know we have such a section. */
14944 abfd
= section
->asection
->owner
;
14946 /* Make sure that at least there's room for the total_length field.
14947 That could be 12 bytes long, but we're just going to fudge that. */
14948 if (offset
+ 4 >= section
->size
)
14950 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14954 lh
= xmalloc (sizeof (*lh
));
14955 memset (lh
, 0, sizeof (*lh
));
14956 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
14959 line_ptr
= section
->buffer
+ offset
;
14961 /* Read in the header. */
14963 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
14964 &bytes_read
, &offset_size
);
14965 line_ptr
+= bytes_read
;
14966 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
14968 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14971 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
14972 lh
->version
= read_2_bytes (abfd
, line_ptr
);
14974 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
14975 line_ptr
+= offset_size
;
14976 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
14978 if (lh
->version
>= 4)
14980 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
14984 lh
->maximum_ops_per_instruction
= 1;
14986 if (lh
->maximum_ops_per_instruction
== 0)
14988 lh
->maximum_ops_per_instruction
= 1;
14989 complaint (&symfile_complaints
,
14990 _("invalid maximum_ops_per_instruction "
14991 "in `.debug_line' section"));
14994 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
14996 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
14998 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
15000 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15002 lh
->standard_opcode_lengths
15003 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15005 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15006 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15008 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15012 /* Read directory table. */
15013 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15015 line_ptr
+= bytes_read
;
15016 add_include_dir (lh
, cur_dir
);
15018 line_ptr
+= bytes_read
;
15020 /* Read file name table. */
15021 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15023 unsigned int dir_index
, mod_time
, length
;
15025 line_ptr
+= bytes_read
;
15026 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15027 line_ptr
+= bytes_read
;
15028 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15029 line_ptr
+= bytes_read
;
15030 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15031 line_ptr
+= bytes_read
;
15033 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15035 line_ptr
+= bytes_read
;
15036 lh
->statement_program_start
= line_ptr
;
15038 if (line_ptr
> (section
->buffer
+ section
->size
))
15039 complaint (&symfile_complaints
,
15040 _("line number info header doesn't "
15041 "fit in `.debug_line' section"));
15043 discard_cleanups (back_to
);
15047 /* Subroutine of dwarf_decode_lines to simplify it.
15048 Return the file name of the psymtab for included file FILE_INDEX
15049 in line header LH of PST.
15050 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15051 If space for the result is malloc'd, it will be freed by a cleanup.
15052 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
15055 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15056 const struct partial_symtab
*pst
,
15057 const char *comp_dir
)
15059 const struct file_entry fe
= lh
->file_names
[file_index
];
15060 char *include_name
= fe
.name
;
15061 char *include_name_to_compare
= include_name
;
15062 char *dir_name
= NULL
;
15063 const char *pst_filename
;
15064 char *copied_name
= NULL
;
15068 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15070 if (!IS_ABSOLUTE_PATH (include_name
)
15071 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15073 /* Avoid creating a duplicate psymtab for PST.
15074 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15075 Before we do the comparison, however, we need to account
15076 for DIR_NAME and COMP_DIR.
15077 First prepend dir_name (if non-NULL). If we still don't
15078 have an absolute path prepend comp_dir (if non-NULL).
15079 However, the directory we record in the include-file's
15080 psymtab does not contain COMP_DIR (to match the
15081 corresponding symtab(s)).
15086 bash$ gcc -g ./hello.c
15087 include_name = "hello.c"
15089 DW_AT_comp_dir = comp_dir = "/tmp"
15090 DW_AT_name = "./hello.c" */
15092 if (dir_name
!= NULL
)
15094 include_name
= concat (dir_name
, SLASH_STRING
,
15095 include_name
, (char *)NULL
);
15096 include_name_to_compare
= include_name
;
15097 make_cleanup (xfree
, include_name
);
15099 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15101 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
15102 include_name
, (char *)NULL
);
15106 pst_filename
= pst
->filename
;
15107 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15109 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15110 pst_filename
, (char *)NULL
);
15111 pst_filename
= copied_name
;
15114 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15116 if (include_name_to_compare
!= include_name
)
15117 xfree (include_name_to_compare
);
15118 if (copied_name
!= NULL
)
15119 xfree (copied_name
);
15123 return include_name
;
15126 /* Ignore this record_line request. */
15129 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15134 /* Subroutine of dwarf_decode_lines to simplify it.
15135 Process the line number information in LH. */
15138 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15139 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15141 gdb_byte
*line_ptr
, *extended_end
;
15142 gdb_byte
*line_end
;
15143 unsigned int bytes_read
, extended_len
;
15144 unsigned char op_code
, extended_op
, adj_opcode
;
15145 CORE_ADDR baseaddr
;
15146 struct objfile
*objfile
= cu
->objfile
;
15147 bfd
*abfd
= objfile
->obfd
;
15148 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15149 const int decode_for_pst_p
= (pst
!= NULL
);
15150 struct subfile
*last_subfile
= NULL
;
15151 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15154 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15156 line_ptr
= lh
->statement_program_start
;
15157 line_end
= lh
->statement_program_end
;
15159 /* Read the statement sequences until there's nothing left. */
15160 while (line_ptr
< line_end
)
15162 /* state machine registers */
15163 CORE_ADDR address
= 0;
15164 unsigned int file
= 1;
15165 unsigned int line
= 1;
15166 unsigned int column
= 0;
15167 int is_stmt
= lh
->default_is_stmt
;
15168 int basic_block
= 0;
15169 int end_sequence
= 0;
15171 unsigned char op_index
= 0;
15173 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15175 /* Start a subfile for the current file of the state machine. */
15176 /* lh->include_dirs and lh->file_names are 0-based, but the
15177 directory and file name numbers in the statement program
15179 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15183 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15185 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15188 /* Decode the table. */
15189 while (!end_sequence
)
15191 op_code
= read_1_byte (abfd
, line_ptr
);
15193 if (line_ptr
> line_end
)
15195 dwarf2_debug_line_missing_end_sequence_complaint ();
15199 if (op_code
>= lh
->opcode_base
)
15201 /* Special operand. */
15202 adj_opcode
= op_code
- lh
->opcode_base
;
15203 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15204 / lh
->maximum_ops_per_instruction
)
15205 * lh
->minimum_instruction_length
);
15206 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15207 % lh
->maximum_ops_per_instruction
);
15208 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15209 if (lh
->num_file_names
< file
|| file
== 0)
15210 dwarf2_debug_line_missing_file_complaint ();
15211 /* For now we ignore lines not starting on an
15212 instruction boundary. */
15213 else if (op_index
== 0)
15215 lh
->file_names
[file
- 1].included_p
= 1;
15216 if (!decode_for_pst_p
&& is_stmt
)
15218 if (last_subfile
!= current_subfile
)
15220 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15222 (*p_record_line
) (last_subfile
, 0, addr
);
15223 last_subfile
= current_subfile
;
15225 /* Append row to matrix using current values. */
15226 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15227 (*p_record_line
) (current_subfile
, line
, addr
);
15232 else switch (op_code
)
15234 case DW_LNS_extended_op
:
15235 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15237 line_ptr
+= bytes_read
;
15238 extended_end
= line_ptr
+ extended_len
;
15239 extended_op
= read_1_byte (abfd
, line_ptr
);
15241 switch (extended_op
)
15243 case DW_LNE_end_sequence
:
15244 p_record_line
= record_line
;
15247 case DW_LNE_set_address
:
15248 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15250 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15252 /* This line table is for a function which has been
15253 GCd by the linker. Ignore it. PR gdb/12528 */
15256 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15258 complaint (&symfile_complaints
,
15259 _(".debug_line address at offset 0x%lx is 0 "
15261 line_offset
, objfile
->name
);
15262 p_record_line
= noop_record_line
;
15266 line_ptr
+= bytes_read
;
15267 address
+= baseaddr
;
15269 case DW_LNE_define_file
:
15272 unsigned int dir_index
, mod_time
, length
;
15274 cur_file
= read_direct_string (abfd
, line_ptr
,
15276 line_ptr
+= bytes_read
;
15278 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15279 line_ptr
+= bytes_read
;
15281 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15282 line_ptr
+= bytes_read
;
15284 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15285 line_ptr
+= bytes_read
;
15286 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15289 case DW_LNE_set_discriminator
:
15290 /* The discriminator is not interesting to the debugger;
15292 line_ptr
= extended_end
;
15295 complaint (&symfile_complaints
,
15296 _("mangled .debug_line section"));
15299 /* Make sure that we parsed the extended op correctly. If e.g.
15300 we expected a different address size than the producer used,
15301 we may have read the wrong number of bytes. */
15302 if (line_ptr
!= extended_end
)
15304 complaint (&symfile_complaints
,
15305 _("mangled .debug_line section"));
15310 if (lh
->num_file_names
< file
|| file
== 0)
15311 dwarf2_debug_line_missing_file_complaint ();
15314 lh
->file_names
[file
- 1].included_p
= 1;
15315 if (!decode_for_pst_p
&& is_stmt
)
15317 if (last_subfile
!= current_subfile
)
15319 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15321 (*p_record_line
) (last_subfile
, 0, addr
);
15322 last_subfile
= current_subfile
;
15324 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15325 (*p_record_line
) (current_subfile
, line
, addr
);
15330 case DW_LNS_advance_pc
:
15333 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15335 address
+= (((op_index
+ adjust
)
15336 / lh
->maximum_ops_per_instruction
)
15337 * lh
->minimum_instruction_length
);
15338 op_index
= ((op_index
+ adjust
)
15339 % lh
->maximum_ops_per_instruction
);
15340 line_ptr
+= bytes_read
;
15343 case DW_LNS_advance_line
:
15344 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15345 line_ptr
+= bytes_read
;
15347 case DW_LNS_set_file
:
15349 /* The arrays lh->include_dirs and lh->file_names are
15350 0-based, but the directory and file name numbers in
15351 the statement program are 1-based. */
15352 struct file_entry
*fe
;
15355 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15356 line_ptr
+= bytes_read
;
15357 if (lh
->num_file_names
< file
|| file
== 0)
15358 dwarf2_debug_line_missing_file_complaint ();
15361 fe
= &lh
->file_names
[file
- 1];
15363 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15364 if (!decode_for_pst_p
)
15366 last_subfile
= current_subfile
;
15367 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15372 case DW_LNS_set_column
:
15373 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15374 line_ptr
+= bytes_read
;
15376 case DW_LNS_negate_stmt
:
15377 is_stmt
= (!is_stmt
);
15379 case DW_LNS_set_basic_block
:
15382 /* Add to the address register of the state machine the
15383 address increment value corresponding to special opcode
15384 255. I.e., this value is scaled by the minimum
15385 instruction length since special opcode 255 would have
15386 scaled the increment. */
15387 case DW_LNS_const_add_pc
:
15389 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15391 address
+= (((op_index
+ adjust
)
15392 / lh
->maximum_ops_per_instruction
)
15393 * lh
->minimum_instruction_length
);
15394 op_index
= ((op_index
+ adjust
)
15395 % lh
->maximum_ops_per_instruction
);
15398 case DW_LNS_fixed_advance_pc
:
15399 address
+= read_2_bytes (abfd
, line_ptr
);
15405 /* Unknown standard opcode, ignore it. */
15408 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15410 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15411 line_ptr
+= bytes_read
;
15416 if (lh
->num_file_names
< file
|| file
== 0)
15417 dwarf2_debug_line_missing_file_complaint ();
15420 lh
->file_names
[file
- 1].included_p
= 1;
15421 if (!decode_for_pst_p
)
15423 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15424 (*p_record_line
) (current_subfile
, 0, addr
);
15430 /* Decode the Line Number Program (LNP) for the given line_header
15431 structure and CU. The actual information extracted and the type
15432 of structures created from the LNP depends on the value of PST.
15434 1. If PST is NULL, then this procedure uses the data from the program
15435 to create all necessary symbol tables, and their linetables.
15437 2. If PST is not NULL, this procedure reads the program to determine
15438 the list of files included by the unit represented by PST, and
15439 builds all the associated partial symbol tables.
15441 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15442 It is used for relative paths in the line table.
15443 NOTE: When processing partial symtabs (pst != NULL),
15444 comp_dir == pst->dirname.
15446 NOTE: It is important that psymtabs have the same file name (via strcmp)
15447 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15448 symtab we don't use it in the name of the psymtabs we create.
15449 E.g. expand_line_sal requires this when finding psymtabs to expand.
15450 A good testcase for this is mb-inline.exp. */
15453 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15454 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15455 int want_line_info
)
15457 struct objfile
*objfile
= cu
->objfile
;
15458 const int decode_for_pst_p
= (pst
!= NULL
);
15459 struct subfile
*first_subfile
= current_subfile
;
15461 if (want_line_info
)
15462 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15464 if (decode_for_pst_p
)
15468 /* Now that we're done scanning the Line Header Program, we can
15469 create the psymtab of each included file. */
15470 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15471 if (lh
->file_names
[file_index
].included_p
== 1)
15473 char *include_name
=
15474 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15475 if (include_name
!= NULL
)
15476 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15481 /* Make sure a symtab is created for every file, even files
15482 which contain only variables (i.e. no code with associated
15486 for (i
= 0; i
< lh
->num_file_names
; i
++)
15489 struct file_entry
*fe
;
15491 fe
= &lh
->file_names
[i
];
15493 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15494 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15496 /* Skip the main file; we don't need it, and it must be
15497 allocated last, so that it will show up before the
15498 non-primary symtabs in the objfile's symtab list. */
15499 if (current_subfile
== first_subfile
)
15502 if (current_subfile
->symtab
== NULL
)
15503 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15505 fe
->symtab
= current_subfile
->symtab
;
15510 /* Start a subfile for DWARF. FILENAME is the name of the file and
15511 DIRNAME the name of the source directory which contains FILENAME
15512 or NULL if not known. COMP_DIR is the compilation directory for the
15513 linetable's compilation unit or NULL if not known.
15514 This routine tries to keep line numbers from identical absolute and
15515 relative file names in a common subfile.
15517 Using the `list' example from the GDB testsuite, which resides in
15518 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15519 of /srcdir/list0.c yields the following debugging information for list0.c:
15521 DW_AT_name: /srcdir/list0.c
15522 DW_AT_comp_dir: /compdir
15523 files.files[0].name: list0.h
15524 files.files[0].dir: /srcdir
15525 files.files[1].name: list0.c
15526 files.files[1].dir: /srcdir
15528 The line number information for list0.c has to end up in a single
15529 subfile, so that `break /srcdir/list0.c:1' works as expected.
15530 start_subfile will ensure that this happens provided that we pass the
15531 concatenation of files.files[1].dir and files.files[1].name as the
15535 dwarf2_start_subfile (char *filename
, const char *dirname
,
15536 const char *comp_dir
)
15540 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15541 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15542 second argument to start_subfile. To be consistent, we do the
15543 same here. In order not to lose the line information directory,
15544 we concatenate it to the filename when it makes sense.
15545 Note that the Dwarf3 standard says (speaking of filenames in line
15546 information): ``The directory index is ignored for file names
15547 that represent full path names''. Thus ignoring dirname in the
15548 `else' branch below isn't an issue. */
15550 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15551 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15553 fullname
= filename
;
15555 start_subfile (fullname
, comp_dir
);
15557 if (fullname
!= filename
)
15561 /* Start a symtab for DWARF.
15562 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15565 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15566 char *name
, char *comp_dir
, CORE_ADDR low_pc
)
15568 start_symtab (name
, comp_dir
, low_pc
);
15569 record_debugformat ("DWARF 2");
15570 record_producer (cu
->producer
);
15572 /* We assume that we're processing GCC output. */
15573 processing_gcc_compilation
= 2;
15575 processing_has_namespace_info
= 0;
15579 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15580 struct dwarf2_cu
*cu
)
15582 struct objfile
*objfile
= cu
->objfile
;
15583 struct comp_unit_head
*cu_header
= &cu
->header
;
15585 /* NOTE drow/2003-01-30: There used to be a comment and some special
15586 code here to turn a symbol with DW_AT_external and a
15587 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15588 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15589 with some versions of binutils) where shared libraries could have
15590 relocations against symbols in their debug information - the
15591 minimal symbol would have the right address, but the debug info
15592 would not. It's no longer necessary, because we will explicitly
15593 apply relocations when we read in the debug information now. */
15595 /* A DW_AT_location attribute with no contents indicates that a
15596 variable has been optimized away. */
15597 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15599 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15603 /* Handle one degenerate form of location expression specially, to
15604 preserve GDB's previous behavior when section offsets are
15605 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15606 then mark this symbol as LOC_STATIC. */
15608 if (attr_form_is_block (attr
)
15609 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15610 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15611 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15612 && (DW_BLOCK (attr
)->size
15613 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15615 unsigned int dummy
;
15617 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15618 SYMBOL_VALUE_ADDRESS (sym
) =
15619 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15621 SYMBOL_VALUE_ADDRESS (sym
) =
15622 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15623 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15624 fixup_symbol_section (sym
, objfile
);
15625 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15626 SYMBOL_SECTION (sym
));
15630 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15631 expression evaluator, and use LOC_COMPUTED only when necessary
15632 (i.e. when the value of a register or memory location is
15633 referenced, or a thread-local block, etc.). Then again, it might
15634 not be worthwhile. I'm assuming that it isn't unless performance
15635 or memory numbers show me otherwise. */
15637 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
15638 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15640 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
15641 cu
->has_loclist
= 1;
15644 /* Given a pointer to a DWARF information entry, figure out if we need
15645 to make a symbol table entry for it, and if so, create a new entry
15646 and return a pointer to it.
15647 If TYPE is NULL, determine symbol type from the die, otherwise
15648 used the passed type.
15649 If SPACE is not NULL, use it to hold the new symbol. If it is
15650 NULL, allocate a new symbol on the objfile's obstack. */
15652 static struct symbol
*
15653 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15654 struct symbol
*space
)
15656 struct objfile
*objfile
= cu
->objfile
;
15657 struct symbol
*sym
= NULL
;
15659 struct attribute
*attr
= NULL
;
15660 struct attribute
*attr2
= NULL
;
15661 CORE_ADDR baseaddr
;
15662 struct pending
**list_to_add
= NULL
;
15664 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15666 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15668 name
= dwarf2_name (die
, cu
);
15671 const char *linkagename
;
15672 int suppress_add
= 0;
15677 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
15678 OBJSTAT (objfile
, n_syms
++);
15680 /* Cache this symbol's name and the name's demangled form (if any). */
15681 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
15682 linkagename
= dwarf2_physname (name
, die
, cu
);
15683 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15685 /* Fortran does not have mangling standard and the mangling does differ
15686 between gfortran, iFort etc. */
15687 if (cu
->language
== language_fortran
15688 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15689 symbol_set_demangled_name (&(sym
->ginfo
),
15690 (char *) dwarf2_full_name (name
, die
, cu
),
15693 /* Default assumptions.
15694 Use the passed type or decode it from the die. */
15695 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15696 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15698 SYMBOL_TYPE (sym
) = type
;
15700 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
15701 attr
= dwarf2_attr (die
,
15702 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
15706 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
15709 attr
= dwarf2_attr (die
,
15710 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
15714 int file_index
= DW_UNSND (attr
);
15716 if (cu
->line_header
== NULL
15717 || file_index
> cu
->line_header
->num_file_names
)
15718 complaint (&symfile_complaints
,
15719 _("file index out of range"));
15720 else if (file_index
> 0)
15722 struct file_entry
*fe
;
15724 fe
= &cu
->line_header
->file_names
[file_index
- 1];
15725 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
15732 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
15735 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
15737 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
15738 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
15739 SYMBOL_CLASS (sym
) = LOC_LABEL
;
15740 add_symbol_to_list (sym
, cu
->list_in_scope
);
15742 case DW_TAG_subprogram
:
15743 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15745 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15746 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15747 if ((attr2
&& (DW_UNSND (attr2
) != 0))
15748 || cu
->language
== language_ada
)
15750 /* Subprograms marked external are stored as a global symbol.
15751 Ada subprograms, whether marked external or not, are always
15752 stored as a global symbol, because we want to be able to
15753 access them globally. For instance, we want to be able
15754 to break on a nested subprogram without having to
15755 specify the context. */
15756 list_to_add
= &global_symbols
;
15760 list_to_add
= cu
->list_in_scope
;
15763 case DW_TAG_inlined_subroutine
:
15764 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15766 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15767 SYMBOL_INLINED (sym
) = 1;
15768 list_to_add
= cu
->list_in_scope
;
15770 case DW_TAG_template_value_param
:
15772 /* Fall through. */
15773 case DW_TAG_constant
:
15774 case DW_TAG_variable
:
15775 case DW_TAG_member
:
15776 /* Compilation with minimal debug info may result in
15777 variables with missing type entries. Change the
15778 misleading `void' type to something sensible. */
15779 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
15781 = objfile_type (objfile
)->nodebug_data_symbol
;
15783 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15784 /* In the case of DW_TAG_member, we should only be called for
15785 static const members. */
15786 if (die
->tag
== DW_TAG_member
)
15788 /* dwarf2_add_field uses die_is_declaration,
15789 so we do the same. */
15790 gdb_assert (die_is_declaration (die
, cu
));
15795 dwarf2_const_value (attr
, sym
, cu
);
15796 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15799 if (attr2
&& (DW_UNSND (attr2
) != 0))
15800 list_to_add
= &global_symbols
;
15802 list_to_add
= cu
->list_in_scope
;
15806 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15809 var_decode_location (attr
, sym
, cu
);
15810 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15812 /* Fortran explicitly imports any global symbols to the local
15813 scope by DW_TAG_common_block. */
15814 if (cu
->language
== language_fortran
&& die
->parent
15815 && die
->parent
->tag
== DW_TAG_common_block
)
15818 if (SYMBOL_CLASS (sym
) == LOC_STATIC
15819 && SYMBOL_VALUE_ADDRESS (sym
) == 0
15820 && !dwarf2_per_objfile
->has_section_at_zero
)
15822 /* When a static variable is eliminated by the linker,
15823 the corresponding debug information is not stripped
15824 out, but the variable address is set to null;
15825 do not add such variables into symbol table. */
15827 else if (attr2
&& (DW_UNSND (attr2
) != 0))
15829 /* Workaround gfortran PR debug/40040 - it uses
15830 DW_AT_location for variables in -fPIC libraries which may
15831 get overriden by other libraries/executable and get
15832 a different address. Resolve it by the minimal symbol
15833 which may come from inferior's executable using copy
15834 relocation. Make this workaround only for gfortran as for
15835 other compilers GDB cannot guess the minimal symbol
15836 Fortran mangling kind. */
15837 if (cu
->language
== language_fortran
&& die
->parent
15838 && die
->parent
->tag
== DW_TAG_module
15840 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
15841 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15843 /* A variable with DW_AT_external is never static,
15844 but it may be block-scoped. */
15845 list_to_add
= (cu
->list_in_scope
== &file_symbols
15846 ? &global_symbols
: cu
->list_in_scope
);
15849 list_to_add
= cu
->list_in_scope
;
15853 /* We do not know the address of this symbol.
15854 If it is an external symbol and we have type information
15855 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15856 The address of the variable will then be determined from
15857 the minimal symbol table whenever the variable is
15859 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15861 /* Fortran explicitly imports any global symbols to the local
15862 scope by DW_TAG_common_block. */
15863 if (cu
->language
== language_fortran
&& die
->parent
15864 && die
->parent
->tag
== DW_TAG_common_block
)
15866 /* SYMBOL_CLASS doesn't matter here because
15867 read_common_block is going to reset it. */
15869 list_to_add
= cu
->list_in_scope
;
15871 else if (attr2
&& (DW_UNSND (attr2
) != 0)
15872 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
15874 /* A variable with DW_AT_external is never static, but it
15875 may be block-scoped. */
15876 list_to_add
= (cu
->list_in_scope
== &file_symbols
15877 ? &global_symbols
: cu
->list_in_scope
);
15879 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15881 else if (!die_is_declaration (die
, cu
))
15883 /* Use the default LOC_OPTIMIZED_OUT class. */
15884 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15886 list_to_add
= cu
->list_in_scope
;
15890 case DW_TAG_formal_parameter
:
15891 /* If we are inside a function, mark this as an argument. If
15892 not, we might be looking at an argument to an inlined function
15893 when we do not have enough information to show inlined frames;
15894 pretend it's a local variable in that case so that the user can
15896 if (context_stack_depth
> 0
15897 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15898 SYMBOL_IS_ARGUMENT (sym
) = 1;
15899 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15902 var_decode_location (attr
, sym
, cu
);
15904 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15907 dwarf2_const_value (attr
, sym
, cu
);
15910 list_to_add
= cu
->list_in_scope
;
15912 case DW_TAG_unspecified_parameters
:
15913 /* From varargs functions; gdb doesn't seem to have any
15914 interest in this information, so just ignore it for now.
15917 case DW_TAG_template_type_param
:
15919 /* Fall through. */
15920 case DW_TAG_class_type
:
15921 case DW_TAG_interface_type
:
15922 case DW_TAG_structure_type
:
15923 case DW_TAG_union_type
:
15924 case DW_TAG_set_type
:
15925 case DW_TAG_enumeration_type
:
15926 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15927 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
15930 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
15931 really ever be static objects: otherwise, if you try
15932 to, say, break of a class's method and you're in a file
15933 which doesn't mention that class, it won't work unless
15934 the check for all static symbols in lookup_symbol_aux
15935 saves you. See the OtherFileClass tests in
15936 gdb.c++/namespace.exp. */
15940 list_to_add
= (cu
->list_in_scope
== &file_symbols
15941 && (cu
->language
== language_cplus
15942 || cu
->language
== language_java
)
15943 ? &global_symbols
: cu
->list_in_scope
);
15945 /* The semantics of C++ state that "struct foo {
15946 ... }" also defines a typedef for "foo". A Java
15947 class declaration also defines a typedef for the
15949 if (cu
->language
== language_cplus
15950 || cu
->language
== language_java
15951 || cu
->language
== language_ada
)
15953 /* The symbol's name is already allocated along
15954 with this objfile, so we don't need to
15955 duplicate it for the type. */
15956 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
15957 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
15962 case DW_TAG_typedef
:
15963 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15964 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15965 list_to_add
= cu
->list_in_scope
;
15967 case DW_TAG_base_type
:
15968 case DW_TAG_subrange_type
:
15969 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15970 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15971 list_to_add
= cu
->list_in_scope
;
15973 case DW_TAG_enumerator
:
15974 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15977 dwarf2_const_value (attr
, sym
, cu
);
15980 /* NOTE: carlton/2003-11-10: See comment above in the
15981 DW_TAG_class_type, etc. block. */
15983 list_to_add
= (cu
->list_in_scope
== &file_symbols
15984 && (cu
->language
== language_cplus
15985 || cu
->language
== language_java
)
15986 ? &global_symbols
: cu
->list_in_scope
);
15989 case DW_TAG_namespace
:
15990 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15991 list_to_add
= &global_symbols
;
15993 case DW_TAG_common_block
:
15994 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15995 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
15996 add_symbol_to_list (sym
, cu
->list_in_scope
);
15999 /* Not a tag we recognize. Hopefully we aren't processing
16000 trash data, but since we must specifically ignore things
16001 we don't recognize, there is nothing else we should do at
16003 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16004 dwarf_tag_name (die
->tag
));
16010 sym
->hash_next
= objfile
->template_symbols
;
16011 objfile
->template_symbols
= sym
;
16012 list_to_add
= NULL
;
16015 if (list_to_add
!= NULL
)
16016 add_symbol_to_list (sym
, list_to_add
);
16018 /* For the benefit of old versions of GCC, check for anonymous
16019 namespaces based on the demangled name. */
16020 if (!processing_has_namespace_info
16021 && cu
->language
== language_cplus
)
16022 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16027 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16029 static struct symbol
*
16030 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16032 return new_symbol_full (die
, type
, cu
, NULL
);
16035 /* Given an attr with a DW_FORM_dataN value in host byte order,
16036 zero-extend it as appropriate for the symbol's type. The DWARF
16037 standard (v4) is not entirely clear about the meaning of using
16038 DW_FORM_dataN for a constant with a signed type, where the type is
16039 wider than the data. The conclusion of a discussion on the DWARF
16040 list was that this is unspecified. We choose to always zero-extend
16041 because that is the interpretation long in use by GCC. */
16044 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16045 const char *name
, struct obstack
*obstack
,
16046 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16048 struct objfile
*objfile
= cu
->objfile
;
16049 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16050 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16051 LONGEST l
= DW_UNSND (attr
);
16053 if (bits
< sizeof (*value
) * 8)
16055 l
&= ((LONGEST
) 1 << bits
) - 1;
16058 else if (bits
== sizeof (*value
) * 8)
16062 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16063 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16070 /* Read a constant value from an attribute. Either set *VALUE, or if
16071 the value does not fit in *VALUE, set *BYTES - either already
16072 allocated on the objfile obstack, or newly allocated on OBSTACK,
16073 or, set *BATON, if we translated the constant to a location
16077 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16078 const char *name
, struct obstack
*obstack
,
16079 struct dwarf2_cu
*cu
,
16080 LONGEST
*value
, gdb_byte
**bytes
,
16081 struct dwarf2_locexpr_baton
**baton
)
16083 struct objfile
*objfile
= cu
->objfile
;
16084 struct comp_unit_head
*cu_header
= &cu
->header
;
16085 struct dwarf_block
*blk
;
16086 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16087 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16093 switch (attr
->form
)
16096 case DW_FORM_GNU_addr_index
:
16100 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16101 dwarf2_const_value_length_mismatch_complaint (name
,
16102 cu_header
->addr_size
,
16103 TYPE_LENGTH (type
));
16104 /* Symbols of this form are reasonably rare, so we just
16105 piggyback on the existing location code rather than writing
16106 a new implementation of symbol_computed_ops. */
16107 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16108 sizeof (struct dwarf2_locexpr_baton
));
16109 (*baton
)->per_cu
= cu
->per_cu
;
16110 gdb_assert ((*baton
)->per_cu
);
16112 (*baton
)->size
= 2 + cu_header
->addr_size
;
16113 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16114 (*baton
)->data
= data
;
16116 data
[0] = DW_OP_addr
;
16117 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16118 byte_order
, DW_ADDR (attr
));
16119 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16122 case DW_FORM_string
:
16124 case DW_FORM_GNU_str_index
:
16125 case DW_FORM_GNU_strp_alt
:
16126 /* DW_STRING is already allocated on the objfile obstack, point
16128 *bytes
= (gdb_byte
*) DW_STRING (attr
);
16130 case DW_FORM_block1
:
16131 case DW_FORM_block2
:
16132 case DW_FORM_block4
:
16133 case DW_FORM_block
:
16134 case DW_FORM_exprloc
:
16135 blk
= DW_BLOCK (attr
);
16136 if (TYPE_LENGTH (type
) != blk
->size
)
16137 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16138 TYPE_LENGTH (type
));
16139 *bytes
= blk
->data
;
16142 /* The DW_AT_const_value attributes are supposed to carry the
16143 symbol's value "represented as it would be on the target
16144 architecture." By the time we get here, it's already been
16145 converted to host endianness, so we just need to sign- or
16146 zero-extend it as appropriate. */
16147 case DW_FORM_data1
:
16148 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16149 obstack
, cu
, value
, 8);
16151 case DW_FORM_data2
:
16152 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16153 obstack
, cu
, value
, 16);
16155 case DW_FORM_data4
:
16156 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16157 obstack
, cu
, value
, 32);
16159 case DW_FORM_data8
:
16160 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16161 obstack
, cu
, value
, 64);
16164 case DW_FORM_sdata
:
16165 *value
= DW_SND (attr
);
16168 case DW_FORM_udata
:
16169 *value
= DW_UNSND (attr
);
16173 complaint (&symfile_complaints
,
16174 _("unsupported const value attribute form: '%s'"),
16175 dwarf_form_name (attr
->form
));
16182 /* Copy constant value from an attribute to a symbol. */
16185 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16186 struct dwarf2_cu
*cu
)
16188 struct objfile
*objfile
= cu
->objfile
;
16189 struct comp_unit_head
*cu_header
= &cu
->header
;
16192 struct dwarf2_locexpr_baton
*baton
;
16194 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16195 SYMBOL_PRINT_NAME (sym
),
16196 &objfile
->objfile_obstack
, cu
,
16197 &value
, &bytes
, &baton
);
16201 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16202 SYMBOL_LOCATION_BATON (sym
) = baton
;
16203 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
16205 else if (bytes
!= NULL
)
16207 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16208 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
16212 SYMBOL_VALUE (sym
) = value
;
16213 SYMBOL_CLASS (sym
) = LOC_CONST
;
16217 /* Return the type of the die in question using its DW_AT_type attribute. */
16219 static struct type
*
16220 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16222 struct attribute
*type_attr
;
16224 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16227 /* A missing DW_AT_type represents a void type. */
16228 return objfile_type (cu
->objfile
)->builtin_void
;
16231 return lookup_die_type (die
, type_attr
, cu
);
16234 /* True iff CU's producer generates GNAT Ada auxiliary information
16235 that allows to find parallel types through that information instead
16236 of having to do expensive parallel lookups by type name. */
16239 need_gnat_info (struct dwarf2_cu
*cu
)
16241 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16242 of GNAT produces this auxiliary information, without any indication
16243 that it is produced. Part of enhancing the FSF version of GNAT
16244 to produce that information will be to put in place an indicator
16245 that we can use in order to determine whether the descriptive type
16246 info is available or not. One suggestion that has been made is
16247 to use a new attribute, attached to the CU die. For now, assume
16248 that the descriptive type info is not available. */
16252 /* Return the auxiliary type of the die in question using its
16253 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16254 attribute is not present. */
16256 static struct type
*
16257 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16259 struct attribute
*type_attr
;
16261 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16265 return lookup_die_type (die
, type_attr
, cu
);
16268 /* If DIE has a descriptive_type attribute, then set the TYPE's
16269 descriptive type accordingly. */
16272 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16273 struct dwarf2_cu
*cu
)
16275 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16277 if (descriptive_type
)
16279 ALLOCATE_GNAT_AUX_TYPE (type
);
16280 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16284 /* Return the containing type of the die in question using its
16285 DW_AT_containing_type attribute. */
16287 static struct type
*
16288 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16290 struct attribute
*type_attr
;
16292 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16294 error (_("Dwarf Error: Problem turning containing type into gdb type "
16295 "[in module %s]"), cu
->objfile
->name
);
16297 return lookup_die_type (die
, type_attr
, cu
);
16300 /* Look up the type of DIE in CU using its type attribute ATTR.
16301 If there is no type substitute an error marker. */
16303 static struct type
*
16304 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16305 struct dwarf2_cu
*cu
)
16307 struct objfile
*objfile
= cu
->objfile
;
16308 struct type
*this_type
;
16310 /* First see if we have it cached. */
16312 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16314 struct dwarf2_per_cu_data
*per_cu
;
16315 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16317 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16318 this_type
= get_die_type_at_offset (offset
, per_cu
);
16320 else if (is_ref_attr (attr
))
16322 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16324 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16326 else if (attr
->form
== DW_FORM_ref_sig8
)
16328 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16330 /* sig_type will be NULL if the signatured type is missing from
16332 if (sig_type
== NULL
)
16333 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16334 "at 0x%x [in module %s]"),
16335 die
->offset
.sect_off
, objfile
->name
);
16337 gdb_assert (sig_type
->per_cu
.is_debug_types
);
16338 /* If we haven't filled in type_offset_in_section yet, then we
16339 haven't read the type in yet. */
16341 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
16344 get_die_type_at_offset (sig_type
->type_offset_in_section
,
16345 &sig_type
->per_cu
);
16350 dump_die_for_error (die
);
16351 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16352 dwarf_attr_name (attr
->name
), objfile
->name
);
16355 /* If not cached we need to read it in. */
16357 if (this_type
== NULL
)
16359 struct die_info
*type_die
;
16360 struct dwarf2_cu
*type_cu
= cu
;
16362 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
16363 /* If we found the type now, it's probably because the type came
16364 from an inter-CU reference and the type's CU got expanded before
16366 this_type
= get_die_type (type_die
, type_cu
);
16367 if (this_type
== NULL
)
16368 this_type
= read_type_die_1 (type_die
, type_cu
);
16371 /* If we still don't have a type use an error marker. */
16373 if (this_type
== NULL
)
16375 char *message
, *saved
;
16377 /* read_type_die already issued a complaint. */
16378 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16380 cu
->header
.offset
.sect_off
,
16381 die
->offset
.sect_off
);
16382 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16383 message
, strlen (message
));
16386 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16392 /* Return the type in DIE, CU.
16393 Returns NULL for invalid types.
16395 This first does a lookup in the appropriate type_hash table,
16396 and only reads the die in if necessary.
16398 NOTE: This can be called when reading in partial or full symbols. */
16400 static struct type
*
16401 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16403 struct type
*this_type
;
16405 this_type
= get_die_type (die
, cu
);
16409 return read_type_die_1 (die
, cu
);
16412 /* Read the type in DIE, CU.
16413 Returns NULL for invalid types. */
16415 static struct type
*
16416 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16418 struct type
*this_type
= NULL
;
16422 case DW_TAG_class_type
:
16423 case DW_TAG_interface_type
:
16424 case DW_TAG_structure_type
:
16425 case DW_TAG_union_type
:
16426 this_type
= read_structure_type (die
, cu
);
16428 case DW_TAG_enumeration_type
:
16429 this_type
= read_enumeration_type (die
, cu
);
16431 case DW_TAG_subprogram
:
16432 case DW_TAG_subroutine_type
:
16433 case DW_TAG_inlined_subroutine
:
16434 this_type
= read_subroutine_type (die
, cu
);
16436 case DW_TAG_array_type
:
16437 this_type
= read_array_type (die
, cu
);
16439 case DW_TAG_set_type
:
16440 this_type
= read_set_type (die
, cu
);
16442 case DW_TAG_pointer_type
:
16443 this_type
= read_tag_pointer_type (die
, cu
);
16445 case DW_TAG_ptr_to_member_type
:
16446 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16448 case DW_TAG_reference_type
:
16449 this_type
= read_tag_reference_type (die
, cu
);
16451 case DW_TAG_const_type
:
16452 this_type
= read_tag_const_type (die
, cu
);
16454 case DW_TAG_volatile_type
:
16455 this_type
= read_tag_volatile_type (die
, cu
);
16457 case DW_TAG_string_type
:
16458 this_type
= read_tag_string_type (die
, cu
);
16460 case DW_TAG_typedef
:
16461 this_type
= read_typedef (die
, cu
);
16463 case DW_TAG_subrange_type
:
16464 this_type
= read_subrange_type (die
, cu
);
16466 case DW_TAG_base_type
:
16467 this_type
= read_base_type (die
, cu
);
16469 case DW_TAG_unspecified_type
:
16470 this_type
= read_unspecified_type (die
, cu
);
16472 case DW_TAG_namespace
:
16473 this_type
= read_namespace_type (die
, cu
);
16475 case DW_TAG_module
:
16476 this_type
= read_module_type (die
, cu
);
16479 complaint (&symfile_complaints
,
16480 _("unexpected tag in read_type_die: '%s'"),
16481 dwarf_tag_name (die
->tag
));
16488 /* See if we can figure out if the class lives in a namespace. We do
16489 this by looking for a member function; its demangled name will
16490 contain namespace info, if there is any.
16491 Return the computed name or NULL.
16492 Space for the result is allocated on the objfile's obstack.
16493 This is the full-die version of guess_partial_die_structure_name.
16494 In this case we know DIE has no useful parent. */
16497 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16499 struct die_info
*spec_die
;
16500 struct dwarf2_cu
*spec_cu
;
16501 struct die_info
*child
;
16504 spec_die
= die_specification (die
, &spec_cu
);
16505 if (spec_die
!= NULL
)
16511 for (child
= die
->child
;
16513 child
= child
->sibling
)
16515 if (child
->tag
== DW_TAG_subprogram
)
16517 struct attribute
*attr
;
16519 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16521 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16525 = language_class_name_from_physname (cu
->language_defn
,
16529 if (actual_name
!= NULL
)
16531 char *die_name
= dwarf2_name (die
, cu
);
16533 if (die_name
!= NULL
16534 && strcmp (die_name
, actual_name
) != 0)
16536 /* Strip off the class name from the full name.
16537 We want the prefix. */
16538 int die_name_len
= strlen (die_name
);
16539 int actual_name_len
= strlen (actual_name
);
16541 /* Test for '::' as a sanity check. */
16542 if (actual_name_len
> die_name_len
+ 2
16543 && actual_name
[actual_name_len
16544 - die_name_len
- 1] == ':')
16546 obsavestring (actual_name
,
16547 actual_name_len
- die_name_len
- 2,
16548 &cu
->objfile
->objfile_obstack
);
16551 xfree (actual_name
);
16560 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16561 prefix part in such case. See
16562 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16565 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16567 struct attribute
*attr
;
16570 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16571 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16574 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16575 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16578 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16580 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16581 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16584 /* dwarf2_name had to be already called. */
16585 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16587 /* Strip the base name, keep any leading namespaces/classes. */
16588 base
= strrchr (DW_STRING (attr
), ':');
16589 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16592 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
16593 &cu
->objfile
->objfile_obstack
);
16596 /* Return the name of the namespace/class that DIE is defined within,
16597 or "" if we can't tell. The caller should not xfree the result.
16599 For example, if we're within the method foo() in the following
16609 then determine_prefix on foo's die will return "N::C". */
16611 static const char *
16612 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16614 struct die_info
*parent
, *spec_die
;
16615 struct dwarf2_cu
*spec_cu
;
16616 struct type
*parent_type
;
16619 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16620 && cu
->language
!= language_fortran
)
16623 retval
= anonymous_struct_prefix (die
, cu
);
16627 /* We have to be careful in the presence of DW_AT_specification.
16628 For example, with GCC 3.4, given the code
16632 // Definition of N::foo.
16636 then we'll have a tree of DIEs like this:
16638 1: DW_TAG_compile_unit
16639 2: DW_TAG_namespace // N
16640 3: DW_TAG_subprogram // declaration of N::foo
16641 4: DW_TAG_subprogram // definition of N::foo
16642 DW_AT_specification // refers to die #3
16644 Thus, when processing die #4, we have to pretend that we're in
16645 the context of its DW_AT_specification, namely the contex of die
16648 spec_die
= die_specification (die
, &spec_cu
);
16649 if (spec_die
== NULL
)
16650 parent
= die
->parent
;
16653 parent
= spec_die
->parent
;
16657 if (parent
== NULL
)
16659 else if (parent
->building_fullname
)
16662 const char *parent_name
;
16664 /* It has been seen on RealView 2.2 built binaries,
16665 DW_TAG_template_type_param types actually _defined_ as
16666 children of the parent class:
16669 template class <class Enum> Class{};
16670 Class<enum E> class_e;
16672 1: DW_TAG_class_type (Class)
16673 2: DW_TAG_enumeration_type (E)
16674 3: DW_TAG_enumerator (enum1:0)
16675 3: DW_TAG_enumerator (enum2:1)
16677 2: DW_TAG_template_type_param
16678 DW_AT_type DW_FORM_ref_udata (E)
16680 Besides being broken debug info, it can put GDB into an
16681 infinite loop. Consider:
16683 When we're building the full name for Class<E>, we'll start
16684 at Class, and go look over its template type parameters,
16685 finding E. We'll then try to build the full name of E, and
16686 reach here. We're now trying to build the full name of E,
16687 and look over the parent DIE for containing scope. In the
16688 broken case, if we followed the parent DIE of E, we'd again
16689 find Class, and once again go look at its template type
16690 arguments, etc., etc. Simply don't consider such parent die
16691 as source-level parent of this die (it can't be, the language
16692 doesn't allow it), and break the loop here. */
16693 name
= dwarf2_name (die
, cu
);
16694 parent_name
= dwarf2_name (parent
, cu
);
16695 complaint (&symfile_complaints
,
16696 _("template param type '%s' defined within parent '%s'"),
16697 name
? name
: "<unknown>",
16698 parent_name
? parent_name
: "<unknown>");
16702 switch (parent
->tag
)
16704 case DW_TAG_namespace
:
16705 parent_type
= read_type_die (parent
, cu
);
16706 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16707 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16708 Work around this problem here. */
16709 if (cu
->language
== language_cplus
16710 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
16712 /* We give a name to even anonymous namespaces. */
16713 return TYPE_TAG_NAME (parent_type
);
16714 case DW_TAG_class_type
:
16715 case DW_TAG_interface_type
:
16716 case DW_TAG_structure_type
:
16717 case DW_TAG_union_type
:
16718 case DW_TAG_module
:
16719 parent_type
= read_type_die (parent
, cu
);
16720 if (TYPE_TAG_NAME (parent_type
) != NULL
)
16721 return TYPE_TAG_NAME (parent_type
);
16723 /* An anonymous structure is only allowed non-static data
16724 members; no typedefs, no member functions, et cetera.
16725 So it does not need a prefix. */
16727 case DW_TAG_compile_unit
:
16728 case DW_TAG_partial_unit
:
16729 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16730 if (cu
->language
== language_cplus
16731 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16732 && die
->child
!= NULL
16733 && (die
->tag
== DW_TAG_class_type
16734 || die
->tag
== DW_TAG_structure_type
16735 || die
->tag
== DW_TAG_union_type
))
16737 char *name
= guess_full_die_structure_name (die
, cu
);
16743 return determine_prefix (parent
, cu
);
16747 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16748 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16749 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16750 an obconcat, otherwise allocate storage for the result. The CU argument is
16751 used to determine the language and hence, the appropriate separator. */
16753 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16756 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
16757 int physname
, struct dwarf2_cu
*cu
)
16759 const char *lead
= "";
16762 if (suffix
== NULL
|| suffix
[0] == '\0'
16763 || prefix
== NULL
|| prefix
[0] == '\0')
16765 else if (cu
->language
== language_java
)
16767 else if (cu
->language
== language_fortran
&& physname
)
16769 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16770 DW_AT_MIPS_linkage_name is preferred and used instead. */
16778 if (prefix
== NULL
)
16780 if (suffix
== NULL
)
16786 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
16788 strcpy (retval
, lead
);
16789 strcat (retval
, prefix
);
16790 strcat (retval
, sep
);
16791 strcat (retval
, suffix
);
16796 /* We have an obstack. */
16797 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
16801 /* Return sibling of die, NULL if no sibling. */
16803 static struct die_info
*
16804 sibling_die (struct die_info
*die
)
16806 return die
->sibling
;
16809 /* Get name of a die, return NULL if not found. */
16812 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
16813 struct obstack
*obstack
)
16815 if (name
&& cu
->language
== language_cplus
)
16817 char *canon_name
= cp_canonicalize_string (name
);
16819 if (canon_name
!= NULL
)
16821 if (strcmp (canon_name
, name
) != 0)
16822 name
= obsavestring (canon_name
, strlen (canon_name
),
16824 xfree (canon_name
);
16831 /* Get name of a die, return NULL if not found. */
16834 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16836 struct attribute
*attr
;
16838 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16839 if ((!attr
|| !DW_STRING (attr
))
16840 && die
->tag
!= DW_TAG_class_type
16841 && die
->tag
!= DW_TAG_interface_type
16842 && die
->tag
!= DW_TAG_structure_type
16843 && die
->tag
!= DW_TAG_union_type
)
16848 case DW_TAG_compile_unit
:
16849 case DW_TAG_partial_unit
:
16850 /* Compilation units have a DW_AT_name that is a filename, not
16851 a source language identifier. */
16852 case DW_TAG_enumeration_type
:
16853 case DW_TAG_enumerator
:
16854 /* These tags always have simple identifiers already; no need
16855 to canonicalize them. */
16856 return DW_STRING (attr
);
16858 case DW_TAG_subprogram
:
16859 /* Java constructors will all be named "<init>", so return
16860 the class name when we see this special case. */
16861 if (cu
->language
== language_java
16862 && DW_STRING (attr
) != NULL
16863 && strcmp (DW_STRING (attr
), "<init>") == 0)
16865 struct dwarf2_cu
*spec_cu
= cu
;
16866 struct die_info
*spec_die
;
16868 /* GCJ will output '<init>' for Java constructor names.
16869 For this special case, return the name of the parent class. */
16871 /* GCJ may output suprogram DIEs with AT_specification set.
16872 If so, use the name of the specified DIE. */
16873 spec_die
= die_specification (die
, &spec_cu
);
16874 if (spec_die
!= NULL
)
16875 return dwarf2_name (spec_die
, spec_cu
);
16880 if (die
->tag
== DW_TAG_class_type
)
16881 return dwarf2_name (die
, cu
);
16883 while (die
->tag
!= DW_TAG_compile_unit
16884 && die
->tag
!= DW_TAG_partial_unit
);
16888 case DW_TAG_class_type
:
16889 case DW_TAG_interface_type
:
16890 case DW_TAG_structure_type
:
16891 case DW_TAG_union_type
:
16892 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16893 structures or unions. These were of the form "._%d" in GCC 4.1,
16894 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16895 and GCC 4.4. We work around this problem by ignoring these. */
16896 if (attr
&& DW_STRING (attr
)
16897 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16898 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16901 /* GCC might emit a nameless typedef that has a linkage name. See
16902 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16903 if (!attr
|| DW_STRING (attr
) == NULL
)
16905 char *demangled
= NULL
;
16907 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16909 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16911 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16914 /* Avoid demangling DW_STRING (attr) the second time on a second
16915 call for the same DIE. */
16916 if (!DW_STRING_IS_CANONICAL (attr
))
16917 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
16923 /* FIXME: we already did this for the partial symbol... */
16924 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
16925 &cu
->objfile
->objfile_obstack
);
16926 DW_STRING_IS_CANONICAL (attr
) = 1;
16929 /* Strip any leading namespaces/classes, keep only the base name.
16930 DW_AT_name for named DIEs does not contain the prefixes. */
16931 base
= strrchr (DW_STRING (attr
), ':');
16932 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
16935 return DW_STRING (attr
);
16944 if (!DW_STRING_IS_CANONICAL (attr
))
16947 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
16948 &cu
->objfile
->objfile_obstack
);
16949 DW_STRING_IS_CANONICAL (attr
) = 1;
16951 return DW_STRING (attr
);
16954 /* Return the die that this die in an extension of, or NULL if there
16955 is none. *EXT_CU is the CU containing DIE on input, and the CU
16956 containing the return value on output. */
16958 static struct die_info
*
16959 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
16961 struct attribute
*attr
;
16963 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
16967 return follow_die_ref (die
, attr
, ext_cu
);
16970 /* Convert a DIE tag into its string name. */
16972 static const char *
16973 dwarf_tag_name (unsigned tag
)
16975 const char *name
= get_DW_TAG_name (tag
);
16978 return "DW_TAG_<unknown>";
16983 /* Convert a DWARF attribute code into its string name. */
16985 static const char *
16986 dwarf_attr_name (unsigned attr
)
16990 #ifdef MIPS /* collides with DW_AT_HP_block_index */
16991 if (attr
== DW_AT_MIPS_fde
)
16992 return "DW_AT_MIPS_fde";
16994 if (attr
== DW_AT_HP_block_index
)
16995 return "DW_AT_HP_block_index";
16998 name
= get_DW_AT_name (attr
);
17001 return "DW_AT_<unknown>";
17006 /* Convert a DWARF value form code into its string name. */
17008 static const char *
17009 dwarf_form_name (unsigned form
)
17011 const char *name
= get_DW_FORM_name (form
);
17014 return "DW_FORM_<unknown>";
17020 dwarf_bool_name (unsigned mybool
)
17028 /* Convert a DWARF type code into its string name. */
17030 static const char *
17031 dwarf_type_encoding_name (unsigned enc
)
17033 const char *name
= get_DW_ATE_name (enc
);
17036 return "DW_ATE_<unknown>";
17042 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17046 print_spaces (indent
, f
);
17047 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17048 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17050 if (die
->parent
!= NULL
)
17052 print_spaces (indent
, f
);
17053 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17054 die
->parent
->offset
.sect_off
);
17057 print_spaces (indent
, f
);
17058 fprintf_unfiltered (f
, " has children: %s\n",
17059 dwarf_bool_name (die
->child
!= NULL
));
17061 print_spaces (indent
, f
);
17062 fprintf_unfiltered (f
, " attributes:\n");
17064 for (i
= 0; i
< die
->num_attrs
; ++i
)
17066 print_spaces (indent
, f
);
17067 fprintf_unfiltered (f
, " %s (%s) ",
17068 dwarf_attr_name (die
->attrs
[i
].name
),
17069 dwarf_form_name (die
->attrs
[i
].form
));
17071 switch (die
->attrs
[i
].form
)
17074 case DW_FORM_GNU_addr_index
:
17075 fprintf_unfiltered (f
, "address: ");
17076 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17078 case DW_FORM_block2
:
17079 case DW_FORM_block4
:
17080 case DW_FORM_block
:
17081 case DW_FORM_block1
:
17082 fprintf_unfiltered (f
, "block: size %s",
17083 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17085 case DW_FORM_exprloc
:
17086 fprintf_unfiltered (f
, "expression: size %s",
17087 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17089 case DW_FORM_ref_addr
:
17090 fprintf_unfiltered (f
, "ref address: ");
17091 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17093 case DW_FORM_GNU_ref_alt
:
17094 fprintf_unfiltered (f
, "alt ref address: ");
17095 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17101 case DW_FORM_ref_udata
:
17102 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17103 (long) (DW_UNSND (&die
->attrs
[i
])));
17105 case DW_FORM_data1
:
17106 case DW_FORM_data2
:
17107 case DW_FORM_data4
:
17108 case DW_FORM_data8
:
17109 case DW_FORM_udata
:
17110 case DW_FORM_sdata
:
17111 fprintf_unfiltered (f
, "constant: %s",
17112 pulongest (DW_UNSND (&die
->attrs
[i
])));
17114 case DW_FORM_sec_offset
:
17115 fprintf_unfiltered (f
, "section offset: %s",
17116 pulongest (DW_UNSND (&die
->attrs
[i
])));
17118 case DW_FORM_ref_sig8
:
17119 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
17120 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
17121 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
17123 fprintf_unfiltered (f
, "signatured type, offset: unknown");
17125 case DW_FORM_string
:
17127 case DW_FORM_GNU_str_index
:
17128 case DW_FORM_GNU_strp_alt
:
17129 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17130 DW_STRING (&die
->attrs
[i
])
17131 ? DW_STRING (&die
->attrs
[i
]) : "",
17132 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17135 if (DW_UNSND (&die
->attrs
[i
]))
17136 fprintf_unfiltered (f
, "flag: TRUE");
17138 fprintf_unfiltered (f
, "flag: FALSE");
17140 case DW_FORM_flag_present
:
17141 fprintf_unfiltered (f
, "flag: TRUE");
17143 case DW_FORM_indirect
:
17144 /* The reader will have reduced the indirect form to
17145 the "base form" so this form should not occur. */
17146 fprintf_unfiltered (f
,
17147 "unexpected attribute form: DW_FORM_indirect");
17150 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17151 die
->attrs
[i
].form
);
17154 fprintf_unfiltered (f
, "\n");
17159 dump_die_for_error (struct die_info
*die
)
17161 dump_die_shallow (gdb_stderr
, 0, die
);
17165 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17167 int indent
= level
* 4;
17169 gdb_assert (die
!= NULL
);
17171 if (level
>= max_level
)
17174 dump_die_shallow (f
, indent
, die
);
17176 if (die
->child
!= NULL
)
17178 print_spaces (indent
, f
);
17179 fprintf_unfiltered (f
, " Children:");
17180 if (level
+ 1 < max_level
)
17182 fprintf_unfiltered (f
, "\n");
17183 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17187 fprintf_unfiltered (f
,
17188 " [not printed, max nesting level reached]\n");
17192 if (die
->sibling
!= NULL
&& level
> 0)
17194 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17198 /* This is called from the pdie macro in gdbinit.in.
17199 It's not static so gcc will keep a copy callable from gdb. */
17202 dump_die (struct die_info
*die
, int max_level
)
17204 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17208 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17212 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17218 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17219 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17222 is_ref_attr (struct attribute
*attr
)
17224 switch (attr
->form
)
17226 case DW_FORM_ref_addr
:
17231 case DW_FORM_ref_udata
:
17232 case DW_FORM_GNU_ref_alt
:
17239 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17243 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17245 sect_offset retval
= { DW_UNSND (attr
) };
17247 if (is_ref_attr (attr
))
17250 retval
.sect_off
= 0;
17251 complaint (&symfile_complaints
,
17252 _("unsupported die ref attribute form: '%s'"),
17253 dwarf_form_name (attr
->form
));
17257 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17258 * the value held by the attribute is not constant. */
17261 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17263 if (attr
->form
== DW_FORM_sdata
)
17264 return DW_SND (attr
);
17265 else if (attr
->form
== DW_FORM_udata
17266 || attr
->form
== DW_FORM_data1
17267 || attr
->form
== DW_FORM_data2
17268 || attr
->form
== DW_FORM_data4
17269 || attr
->form
== DW_FORM_data8
)
17270 return DW_UNSND (attr
);
17273 complaint (&symfile_complaints
,
17274 _("Attribute value is not a constant (%s)"),
17275 dwarf_form_name (attr
->form
));
17276 return default_value
;
17280 /* Follow reference or signature attribute ATTR of SRC_DIE.
17281 On entry *REF_CU is the CU of SRC_DIE.
17282 On exit *REF_CU is the CU of the result. */
17284 static struct die_info
*
17285 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17286 struct dwarf2_cu
**ref_cu
)
17288 struct die_info
*die
;
17290 if (is_ref_attr (attr
))
17291 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17292 else if (attr
->form
== DW_FORM_ref_sig8
)
17293 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17296 dump_die_for_error (src_die
);
17297 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17298 (*ref_cu
)->objfile
->name
);
17304 /* Follow reference OFFSET.
17305 On entry *REF_CU is the CU of the source die referencing OFFSET.
17306 On exit *REF_CU is the CU of the result.
17307 Returns NULL if OFFSET is invalid. */
17309 static struct die_info
*
17310 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17311 struct dwarf2_cu
**ref_cu
)
17313 struct die_info temp_die
;
17314 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17316 gdb_assert (cu
->per_cu
!= NULL
);
17320 if (cu
->per_cu
->is_debug_types
)
17322 /* .debug_types CUs cannot reference anything outside their CU.
17323 If they need to, they have to reference a signatured type via
17324 DW_FORM_ref_sig8. */
17325 if (! offset_in_cu_p (&cu
->header
, offset
))
17328 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17329 || ! offset_in_cu_p (&cu
->header
, offset
))
17331 struct dwarf2_per_cu_data
*per_cu
;
17333 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17336 /* If necessary, add it to the queue and load its DIEs. */
17337 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17338 load_full_comp_unit (per_cu
, cu
->language
);
17340 target_cu
= per_cu
->cu
;
17342 else if (cu
->dies
== NULL
)
17344 /* We're loading full DIEs during partial symbol reading. */
17345 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17346 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17349 *ref_cu
= target_cu
;
17350 temp_die
.offset
= offset
;
17351 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17354 /* Follow reference attribute ATTR of SRC_DIE.
17355 On entry *REF_CU is the CU of SRC_DIE.
17356 On exit *REF_CU is the CU of the result. */
17358 static struct die_info
*
17359 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17360 struct dwarf2_cu
**ref_cu
)
17362 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17363 struct dwarf2_cu
*cu
= *ref_cu
;
17364 struct die_info
*die
;
17366 die
= follow_die_offset (offset
,
17367 (attr
->form
== DW_FORM_GNU_ref_alt
17368 || cu
->per_cu
->is_dwz
),
17371 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17372 "at 0x%x [in module %s]"),
17373 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17378 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17379 Returned value is intended for DW_OP_call*. Returned
17380 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17382 struct dwarf2_locexpr_baton
17383 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17384 struct dwarf2_per_cu_data
*per_cu
,
17385 CORE_ADDR (*get_frame_pc
) (void *baton
),
17388 struct dwarf2_cu
*cu
;
17389 struct die_info
*die
;
17390 struct attribute
*attr
;
17391 struct dwarf2_locexpr_baton retval
;
17393 dw2_setup (per_cu
->objfile
);
17395 if (per_cu
->cu
== NULL
)
17399 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17401 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17402 offset
.sect_off
, per_cu
->objfile
->name
);
17404 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17407 /* DWARF: "If there is no such attribute, then there is no effect.".
17408 DATA is ignored if SIZE is 0. */
17410 retval
.data
= NULL
;
17413 else if (attr_form_is_section_offset (attr
))
17415 struct dwarf2_loclist_baton loclist_baton
;
17416 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17419 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17421 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17423 retval
.size
= size
;
17427 if (!attr_form_is_block (attr
))
17428 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17429 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17430 offset
.sect_off
, per_cu
->objfile
->name
);
17432 retval
.data
= DW_BLOCK (attr
)->data
;
17433 retval
.size
= DW_BLOCK (attr
)->size
;
17435 retval
.per_cu
= cu
->per_cu
;
17437 age_cached_comp_units ();
17442 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17445 struct dwarf2_locexpr_baton
17446 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17447 struct dwarf2_per_cu_data
*per_cu
,
17448 CORE_ADDR (*get_frame_pc
) (void *baton
),
17451 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17453 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17456 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17460 dwarf2_get_die_type (cu_offset die_offset
,
17461 struct dwarf2_per_cu_data
*per_cu
)
17463 sect_offset die_offset_sect
;
17465 dw2_setup (per_cu
->objfile
);
17467 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17468 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17471 /* Follow the signature attribute ATTR in SRC_DIE.
17472 On entry *REF_CU is the CU of SRC_DIE.
17473 On exit *REF_CU is the CU of the result. */
17475 static struct die_info
*
17476 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17477 struct dwarf2_cu
**ref_cu
)
17479 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17480 struct die_info temp_die
;
17481 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
17482 struct dwarf2_cu
*sig_cu
;
17483 struct die_info
*die
;
17485 /* sig_type will be NULL if the signatured type is missing from
17487 if (sig_type
== NULL
)
17488 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17489 "at 0x%x [in module %s]"),
17490 src_die
->offset
.sect_off
, objfile
->name
);
17492 /* If necessary, add it to the queue and load its DIEs. */
17494 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17495 read_signatured_type (sig_type
);
17497 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17499 sig_cu
= sig_type
->per_cu
.cu
;
17500 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17501 temp_die
.offset
= sig_type
->type_offset_in_section
;
17502 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17503 temp_die
.offset
.sect_off
);
17510 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17511 "from DIE at 0x%x [in module %s]"),
17512 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
17515 /* Given an offset of a signatured type, return its signatured_type. */
17517 static struct signatured_type
*
17518 lookup_signatured_type_at_offset (struct objfile
*objfile
,
17519 struct dwarf2_section_info
*section
,
17520 sect_offset offset
)
17522 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
17523 unsigned int length
, initial_length_size
;
17524 unsigned int sig_offset
;
17525 struct signatured_type find_entry
, *sig_type
;
17527 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
17528 sig_offset
= (initial_length_size
17530 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
17531 + 1 /*address_size*/);
17532 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
17533 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
17535 /* This is only used to lookup previously recorded types.
17536 If we didn't find it, it's our bug. */
17537 gdb_assert (sig_type
!= NULL
);
17538 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
17543 /* Load the DIEs associated with type unit PER_CU into memory. */
17546 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17548 struct signatured_type
*sig_type
;
17550 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17551 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17553 /* We have the per_cu, but we need the signatured_type.
17554 Fortunately this is an easy translation. */
17555 gdb_assert (per_cu
->is_debug_types
);
17556 sig_type
= (struct signatured_type
*) per_cu
;
17558 gdb_assert (per_cu
->cu
== NULL
);
17560 read_signatured_type (sig_type
);
17562 gdb_assert (per_cu
->cu
!= NULL
);
17565 /* die_reader_func for read_signatured_type.
17566 This is identical to load_full_comp_unit_reader,
17567 but is kept separate for now. */
17570 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17571 gdb_byte
*info_ptr
,
17572 struct die_info
*comp_unit_die
,
17576 struct dwarf2_cu
*cu
= reader
->cu
;
17578 gdb_assert (cu
->die_hash
== NULL
);
17580 htab_create_alloc_ex (cu
->header
.length
/ 12,
17584 &cu
->comp_unit_obstack
,
17585 hashtab_obstack_allocate
,
17586 dummy_obstack_deallocate
);
17589 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
17590 &info_ptr
, comp_unit_die
);
17591 cu
->dies
= comp_unit_die
;
17592 /* comp_unit_die is not stored in die_hash, no need. */
17594 /* We try not to read any attributes in this function, because not
17595 all CUs needed for references have been loaded yet, and symbol
17596 table processing isn't initialized. But we have to set the CU language,
17597 or we won't be able to build types correctly.
17598 Similarly, if we do not read the producer, we can not apply
17599 producer-specific interpretation. */
17600 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
17603 /* Read in a signatured type and build its CU and DIEs.
17604 If the type is a stub for the real type in a DWO file,
17605 read in the real type from the DWO file as well. */
17608 read_signatured_type (struct signatured_type
*sig_type
)
17610 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
17612 gdb_assert (per_cu
->is_debug_types
);
17613 gdb_assert (per_cu
->cu
== NULL
);
17615 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
17616 read_signatured_type_reader
, NULL
);
17619 /* Decode simple location descriptions.
17620 Given a pointer to a dwarf block that defines a location, compute
17621 the location and return the value.
17623 NOTE drow/2003-11-18: This function is called in two situations
17624 now: for the address of static or global variables (partial symbols
17625 only) and for offsets into structures which are expected to be
17626 (more or less) constant. The partial symbol case should go away,
17627 and only the constant case should remain. That will let this
17628 function complain more accurately. A few special modes are allowed
17629 without complaint for global variables (for instance, global
17630 register values and thread-local values).
17632 A location description containing no operations indicates that the
17633 object is optimized out. The return value is 0 for that case.
17634 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17635 callers will only want a very basic result and this can become a
17638 Note that stack[0] is unused except as a default error return. */
17641 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
17643 struct objfile
*objfile
= cu
->objfile
;
17645 size_t size
= blk
->size
;
17646 gdb_byte
*data
= blk
->data
;
17647 CORE_ADDR stack
[64];
17649 unsigned int bytes_read
, unsnd
;
17655 stack
[++stacki
] = 0;
17694 stack
[++stacki
] = op
- DW_OP_lit0
;
17729 stack
[++stacki
] = op
- DW_OP_reg0
;
17731 dwarf2_complex_location_expr_complaint ();
17735 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
17737 stack
[++stacki
] = unsnd
;
17739 dwarf2_complex_location_expr_complaint ();
17743 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
17748 case DW_OP_const1u
:
17749 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
17753 case DW_OP_const1s
:
17754 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
17758 case DW_OP_const2u
:
17759 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
17763 case DW_OP_const2s
:
17764 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
17768 case DW_OP_const4u
:
17769 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
17773 case DW_OP_const4s
:
17774 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
17778 case DW_OP_const8u
:
17779 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
17784 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
17790 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
17795 stack
[stacki
+ 1] = stack
[stacki
];
17800 stack
[stacki
- 1] += stack
[stacki
];
17804 case DW_OP_plus_uconst
:
17805 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
17811 stack
[stacki
- 1] -= stack
[stacki
];
17816 /* If we're not the last op, then we definitely can't encode
17817 this using GDB's address_class enum. This is valid for partial
17818 global symbols, although the variable's address will be bogus
17821 dwarf2_complex_location_expr_complaint ();
17824 case DW_OP_GNU_push_tls_address
:
17825 /* The top of the stack has the offset from the beginning
17826 of the thread control block at which the variable is located. */
17827 /* Nothing should follow this operator, so the top of stack would
17829 /* This is valid for partial global symbols, but the variable's
17830 address will be bogus in the psymtab. Make it always at least
17831 non-zero to not look as a variable garbage collected by linker
17832 which have DW_OP_addr 0. */
17834 dwarf2_complex_location_expr_complaint ();
17838 case DW_OP_GNU_uninit
:
17841 case DW_OP_GNU_addr_index
:
17842 case DW_OP_GNU_const_index
:
17843 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
17850 const char *name
= get_DW_OP_name (op
);
17853 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
17856 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
17860 return (stack
[stacki
]);
17863 /* Enforce maximum stack depth of SIZE-1 to avoid writing
17864 outside of the allocated space. Also enforce minimum>0. */
17865 if (stacki
>= ARRAY_SIZE (stack
) - 1)
17867 complaint (&symfile_complaints
,
17868 _("location description stack overflow"));
17874 complaint (&symfile_complaints
,
17875 _("location description stack underflow"));
17879 return (stack
[stacki
]);
17882 /* memory allocation interface */
17884 static struct dwarf_block
*
17885 dwarf_alloc_block (struct dwarf2_cu
*cu
)
17887 struct dwarf_block
*blk
;
17889 blk
= (struct dwarf_block
*)
17890 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
17894 static struct die_info
*
17895 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
17897 struct die_info
*die
;
17898 size_t size
= sizeof (struct die_info
);
17901 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
17903 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
17904 memset (die
, 0, sizeof (struct die_info
));
17909 /* Macro support. */
17911 /* Return the full name of file number I in *LH's file name table.
17912 Use COMP_DIR as the name of the current directory of the
17913 compilation. The result is allocated using xmalloc; the caller is
17914 responsible for freeing it. */
17916 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
17918 /* Is the file number a valid index into the line header's file name
17919 table? Remember that file numbers start with one, not zero. */
17920 if (1 <= file
&& file
<= lh
->num_file_names
)
17922 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17924 if (IS_ABSOLUTE_PATH (fe
->name
))
17925 return xstrdup (fe
->name
);
17933 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17939 dir_len
= strlen (dir
);
17940 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
17941 strcpy (full_name
, dir
);
17942 full_name
[dir_len
] = '/';
17943 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
17947 return xstrdup (fe
->name
);
17952 /* The compiler produced a bogus file number. We can at least
17953 record the macro definitions made in the file, even if we
17954 won't be able to find the file by name. */
17955 char fake_name
[80];
17957 xsnprintf (fake_name
, sizeof (fake_name
),
17958 "<bad macro file number %d>", file
);
17960 complaint (&symfile_complaints
,
17961 _("bad file number in macro information (%d)"),
17964 return xstrdup (fake_name
);
17969 static struct macro_source_file
*
17970 macro_start_file (int file
, int line
,
17971 struct macro_source_file
*current_file
,
17972 const char *comp_dir
,
17973 struct line_header
*lh
, struct objfile
*objfile
)
17975 /* The full name of this source file. */
17976 char *full_name
= file_full_name (file
, lh
, comp_dir
);
17978 /* We don't create a macro table for this compilation unit
17979 at all until we actually get a filename. */
17980 if (! pending_macros
)
17981 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
17982 objfile
->per_bfd
->macro_cache
);
17984 if (! current_file
)
17986 /* If we have no current file, then this must be the start_file
17987 directive for the compilation unit's main source file. */
17988 current_file
= macro_set_main (pending_macros
, full_name
);
17989 macro_define_special (pending_macros
);
17992 current_file
= macro_include (current_file
, line
, full_name
);
17996 return current_file
;
18000 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18001 followed by a null byte. */
18003 copy_string (const char *buf
, int len
)
18005 char *s
= xmalloc (len
+ 1);
18007 memcpy (s
, buf
, len
);
18013 static const char *
18014 consume_improper_spaces (const char *p
, const char *body
)
18018 complaint (&symfile_complaints
,
18019 _("macro definition contains spaces "
18020 "in formal argument list:\n`%s'"),
18032 parse_macro_definition (struct macro_source_file
*file
, int line
,
18037 /* The body string takes one of two forms. For object-like macro
18038 definitions, it should be:
18040 <macro name> " " <definition>
18042 For function-like macro definitions, it should be:
18044 <macro name> "() " <definition>
18046 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18048 Spaces may appear only where explicitly indicated, and in the
18051 The Dwarf 2 spec says that an object-like macro's name is always
18052 followed by a space, but versions of GCC around March 2002 omit
18053 the space when the macro's definition is the empty string.
18055 The Dwarf 2 spec says that there should be no spaces between the
18056 formal arguments in a function-like macro's formal argument list,
18057 but versions of GCC around March 2002 include spaces after the
18061 /* Find the extent of the macro name. The macro name is terminated
18062 by either a space or null character (for an object-like macro) or
18063 an opening paren (for a function-like macro). */
18064 for (p
= body
; *p
; p
++)
18065 if (*p
== ' ' || *p
== '(')
18068 if (*p
== ' ' || *p
== '\0')
18070 /* It's an object-like macro. */
18071 int name_len
= p
- body
;
18072 char *name
= copy_string (body
, name_len
);
18073 const char *replacement
;
18076 replacement
= body
+ name_len
+ 1;
18079 dwarf2_macro_malformed_definition_complaint (body
);
18080 replacement
= body
+ name_len
;
18083 macro_define_object (file
, line
, name
, replacement
);
18087 else if (*p
== '(')
18089 /* It's a function-like macro. */
18090 char *name
= copy_string (body
, p
- body
);
18093 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18097 p
= consume_improper_spaces (p
, body
);
18099 /* Parse the formal argument list. */
18100 while (*p
&& *p
!= ')')
18102 /* Find the extent of the current argument name. */
18103 const char *arg_start
= p
;
18105 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18108 if (! *p
|| p
== arg_start
)
18109 dwarf2_macro_malformed_definition_complaint (body
);
18112 /* Make sure argv has room for the new argument. */
18113 if (argc
>= argv_size
)
18116 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18119 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18122 p
= consume_improper_spaces (p
, body
);
18124 /* Consume the comma, if present. */
18129 p
= consume_improper_spaces (p
, body
);
18138 /* Perfectly formed definition, no complaints. */
18139 macro_define_function (file
, line
, name
,
18140 argc
, (const char **) argv
,
18142 else if (*p
== '\0')
18144 /* Complain, but do define it. */
18145 dwarf2_macro_malformed_definition_complaint (body
);
18146 macro_define_function (file
, line
, name
,
18147 argc
, (const char **) argv
,
18151 /* Just complain. */
18152 dwarf2_macro_malformed_definition_complaint (body
);
18155 /* Just complain. */
18156 dwarf2_macro_malformed_definition_complaint (body
);
18162 for (i
= 0; i
< argc
; i
++)
18168 dwarf2_macro_malformed_definition_complaint (body
);
18171 /* Skip some bytes from BYTES according to the form given in FORM.
18172 Returns the new pointer. */
18175 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
18176 enum dwarf_form form
,
18177 unsigned int offset_size
,
18178 struct dwarf2_section_info
*section
)
18180 unsigned int bytes_read
;
18184 case DW_FORM_data1
:
18189 case DW_FORM_data2
:
18193 case DW_FORM_data4
:
18197 case DW_FORM_data8
:
18201 case DW_FORM_string
:
18202 read_direct_string (abfd
, bytes
, &bytes_read
);
18203 bytes
+= bytes_read
;
18206 case DW_FORM_sec_offset
:
18208 case DW_FORM_GNU_strp_alt
:
18209 bytes
+= offset_size
;
18212 case DW_FORM_block
:
18213 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18214 bytes
+= bytes_read
;
18217 case DW_FORM_block1
:
18218 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18220 case DW_FORM_block2
:
18221 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18223 case DW_FORM_block4
:
18224 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18227 case DW_FORM_sdata
:
18228 case DW_FORM_udata
:
18229 case DW_FORM_GNU_addr_index
:
18230 case DW_FORM_GNU_str_index
:
18231 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
18234 dwarf2_section_buffer_overflow_complaint (section
);
18242 complaint (&symfile_complaints
,
18243 _("invalid form 0x%x in `%s'"),
18245 section
->asection
->name
);
18253 /* A helper for dwarf_decode_macros that handles skipping an unknown
18254 opcode. Returns an updated pointer to the macro data buffer; or,
18255 on error, issues a complaint and returns NULL. */
18258 skip_unknown_opcode (unsigned int opcode
,
18259 gdb_byte
**opcode_definitions
,
18260 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18262 unsigned int offset_size
,
18263 struct dwarf2_section_info
*section
)
18265 unsigned int bytes_read
, i
;
18269 if (opcode_definitions
[opcode
] == NULL
)
18271 complaint (&symfile_complaints
,
18272 _("unrecognized DW_MACFINO opcode 0x%x"),
18277 defn
= opcode_definitions
[opcode
];
18278 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18279 defn
+= bytes_read
;
18281 for (i
= 0; i
< arg
; ++i
)
18283 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18285 if (mac_ptr
== NULL
)
18287 /* skip_form_bytes already issued the complaint. */
18295 /* A helper function which parses the header of a macro section.
18296 If the macro section is the extended (for now called "GNU") type,
18297 then this updates *OFFSET_SIZE. Returns a pointer to just after
18298 the header, or issues a complaint and returns NULL on error. */
18301 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
18304 unsigned int *offset_size
,
18305 int section_is_gnu
)
18307 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18309 if (section_is_gnu
)
18311 unsigned int version
, flags
;
18313 version
= read_2_bytes (abfd
, mac_ptr
);
18316 complaint (&symfile_complaints
,
18317 _("unrecognized version `%d' in .debug_macro section"),
18323 flags
= read_1_byte (abfd
, mac_ptr
);
18325 *offset_size
= (flags
& 1) ? 8 : 4;
18327 if ((flags
& 2) != 0)
18328 /* We don't need the line table offset. */
18329 mac_ptr
+= *offset_size
;
18331 /* Vendor opcode descriptions. */
18332 if ((flags
& 4) != 0)
18334 unsigned int i
, count
;
18336 count
= read_1_byte (abfd
, mac_ptr
);
18338 for (i
= 0; i
< count
; ++i
)
18340 unsigned int opcode
, bytes_read
;
18343 opcode
= read_1_byte (abfd
, mac_ptr
);
18345 opcode_definitions
[opcode
] = mac_ptr
;
18346 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18347 mac_ptr
+= bytes_read
;
18356 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18357 including DW_MACRO_GNU_transparent_include. */
18360 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18361 struct macro_source_file
*current_file
,
18362 struct line_header
*lh
, char *comp_dir
,
18363 struct dwarf2_section_info
*section
,
18364 int section_is_gnu
, int section_is_dwz
,
18365 unsigned int offset_size
,
18366 struct objfile
*objfile
,
18367 htab_t include_hash
)
18369 enum dwarf_macro_record_type macinfo_type
;
18370 int at_commandline
;
18371 gdb_byte
*opcode_definitions
[256];
18373 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18374 &offset_size
, section_is_gnu
);
18375 if (mac_ptr
== NULL
)
18377 /* We already issued a complaint. */
18381 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18382 GDB is still reading the definitions from command line. First
18383 DW_MACINFO_start_file will need to be ignored as it was already executed
18384 to create CURRENT_FILE for the main source holding also the command line
18385 definitions. On first met DW_MACINFO_start_file this flag is reset to
18386 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18388 at_commandline
= 1;
18392 /* Do we at least have room for a macinfo type byte? */
18393 if (mac_ptr
>= mac_end
)
18395 dwarf2_section_buffer_overflow_complaint (section
);
18399 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18402 /* Note that we rely on the fact that the corresponding GNU and
18403 DWARF constants are the same. */
18404 switch (macinfo_type
)
18406 /* A zero macinfo type indicates the end of the macro
18411 case DW_MACRO_GNU_define
:
18412 case DW_MACRO_GNU_undef
:
18413 case DW_MACRO_GNU_define_indirect
:
18414 case DW_MACRO_GNU_undef_indirect
:
18415 case DW_MACRO_GNU_define_indirect_alt
:
18416 case DW_MACRO_GNU_undef_indirect_alt
:
18418 unsigned int bytes_read
;
18423 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18424 mac_ptr
+= bytes_read
;
18426 if (macinfo_type
== DW_MACRO_GNU_define
18427 || macinfo_type
== DW_MACRO_GNU_undef
)
18429 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18430 mac_ptr
+= bytes_read
;
18434 LONGEST str_offset
;
18436 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18437 mac_ptr
+= offset_size
;
18439 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18440 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18443 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18445 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18448 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18451 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18452 || macinfo_type
== DW_MACRO_GNU_define_indirect
18453 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18454 if (! current_file
)
18456 /* DWARF violation as no main source is present. */
18457 complaint (&symfile_complaints
,
18458 _("debug info with no main source gives macro %s "
18460 is_define
? _("definition") : _("undefinition"),
18464 if ((line
== 0 && !at_commandline
)
18465 || (line
!= 0 && at_commandline
))
18466 complaint (&symfile_complaints
,
18467 _("debug info gives %s macro %s with %s line %d: %s"),
18468 at_commandline
? _("command-line") : _("in-file"),
18469 is_define
? _("definition") : _("undefinition"),
18470 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18473 parse_macro_definition (current_file
, line
, body
);
18476 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18477 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18478 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18479 macro_undef (current_file
, line
, body
);
18484 case DW_MACRO_GNU_start_file
:
18486 unsigned int bytes_read
;
18489 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18490 mac_ptr
+= bytes_read
;
18491 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18492 mac_ptr
+= bytes_read
;
18494 if ((line
== 0 && !at_commandline
)
18495 || (line
!= 0 && at_commandline
))
18496 complaint (&symfile_complaints
,
18497 _("debug info gives source %d included "
18498 "from %s at %s line %d"),
18499 file
, at_commandline
? _("command-line") : _("file"),
18500 line
== 0 ? _("zero") : _("non-zero"), line
);
18502 if (at_commandline
)
18504 /* This DW_MACRO_GNU_start_file was executed in the
18506 at_commandline
= 0;
18509 current_file
= macro_start_file (file
, line
,
18510 current_file
, comp_dir
,
18515 case DW_MACRO_GNU_end_file
:
18516 if (! current_file
)
18517 complaint (&symfile_complaints
,
18518 _("macro debug info has an unmatched "
18519 "`close_file' directive"));
18522 current_file
= current_file
->included_by
;
18523 if (! current_file
)
18525 enum dwarf_macro_record_type next_type
;
18527 /* GCC circa March 2002 doesn't produce the zero
18528 type byte marking the end of the compilation
18529 unit. Complain if it's not there, but exit no
18532 /* Do we at least have room for a macinfo type byte? */
18533 if (mac_ptr
>= mac_end
)
18535 dwarf2_section_buffer_overflow_complaint (section
);
18539 /* We don't increment mac_ptr here, so this is just
18541 next_type
= read_1_byte (abfd
, mac_ptr
);
18542 if (next_type
!= 0)
18543 complaint (&symfile_complaints
,
18544 _("no terminating 0-type entry for "
18545 "macros in `.debug_macinfo' section"));
18552 case DW_MACRO_GNU_transparent_include
:
18553 case DW_MACRO_GNU_transparent_include_alt
:
18557 bfd
*include_bfd
= abfd
;
18558 struct dwarf2_section_info
*include_section
= section
;
18559 struct dwarf2_section_info alt_section
;
18560 gdb_byte
*include_mac_end
= mac_end
;
18561 int is_dwz
= section_is_dwz
;
18562 gdb_byte
*new_mac_ptr
;
18564 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18565 mac_ptr
+= offset_size
;
18567 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18569 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18571 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18574 include_bfd
= dwz
->macro
.asection
->owner
;
18575 include_section
= &dwz
->macro
;
18576 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18580 new_mac_ptr
= include_section
->buffer
+ offset
;
18581 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18585 /* This has actually happened; see
18586 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18587 complaint (&symfile_complaints
,
18588 _("recursive DW_MACRO_GNU_transparent_include in "
18589 ".debug_macro section"));
18593 *slot
= new_mac_ptr
;
18595 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
18596 include_mac_end
, current_file
,
18598 section
, section_is_gnu
, is_dwz
,
18599 offset_size
, objfile
, include_hash
);
18601 htab_remove_elt (include_hash
, new_mac_ptr
);
18606 case DW_MACINFO_vendor_ext
:
18607 if (!section_is_gnu
)
18609 unsigned int bytes_read
;
18612 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18613 mac_ptr
+= bytes_read
;
18614 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18615 mac_ptr
+= bytes_read
;
18617 /* We don't recognize any vendor extensions. */
18623 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18624 mac_ptr
, mac_end
, abfd
, offset_size
,
18626 if (mac_ptr
== NULL
)
18630 } while (macinfo_type
!= 0);
18634 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
18635 char *comp_dir
, int section_is_gnu
)
18637 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18638 struct line_header
*lh
= cu
->line_header
;
18640 gdb_byte
*mac_ptr
, *mac_end
;
18641 struct macro_source_file
*current_file
= 0;
18642 enum dwarf_macro_record_type macinfo_type
;
18643 unsigned int offset_size
= cu
->header
.offset_size
;
18644 gdb_byte
*opcode_definitions
[256];
18645 struct cleanup
*cleanup
;
18646 htab_t include_hash
;
18648 struct dwarf2_section_info
*section
;
18649 const char *section_name
;
18651 if (cu
->dwo_unit
!= NULL
)
18653 if (section_is_gnu
)
18655 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
18656 section_name
= ".debug_macro.dwo";
18660 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
18661 section_name
= ".debug_macinfo.dwo";
18666 if (section_is_gnu
)
18668 section
= &dwarf2_per_objfile
->macro
;
18669 section_name
= ".debug_macro";
18673 section
= &dwarf2_per_objfile
->macinfo
;
18674 section_name
= ".debug_macinfo";
18678 dwarf2_read_section (objfile
, section
);
18679 if (section
->buffer
== NULL
)
18681 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
18684 abfd
= section
->asection
->owner
;
18686 /* First pass: Find the name of the base filename.
18687 This filename is needed in order to process all macros whose definition
18688 (or undefinition) comes from the command line. These macros are defined
18689 before the first DW_MACINFO_start_file entry, and yet still need to be
18690 associated to the base file.
18692 To determine the base file name, we scan the macro definitions until we
18693 reach the first DW_MACINFO_start_file entry. We then initialize
18694 CURRENT_FILE accordingly so that any macro definition found before the
18695 first DW_MACINFO_start_file can still be associated to the base file. */
18697 mac_ptr
= section
->buffer
+ offset
;
18698 mac_end
= section
->buffer
+ section
->size
;
18700 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18701 &offset_size
, section_is_gnu
);
18702 if (mac_ptr
== NULL
)
18704 /* We already issued a complaint. */
18710 /* Do we at least have room for a macinfo type byte? */
18711 if (mac_ptr
>= mac_end
)
18713 /* Complaint is printed during the second pass as GDB will probably
18714 stop the first pass earlier upon finding
18715 DW_MACINFO_start_file. */
18719 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18722 /* Note that we rely on the fact that the corresponding GNU and
18723 DWARF constants are the same. */
18724 switch (macinfo_type
)
18726 /* A zero macinfo type indicates the end of the macro
18731 case DW_MACRO_GNU_define
:
18732 case DW_MACRO_GNU_undef
:
18733 /* Only skip the data by MAC_PTR. */
18735 unsigned int bytes_read
;
18737 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18738 mac_ptr
+= bytes_read
;
18739 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18740 mac_ptr
+= bytes_read
;
18744 case DW_MACRO_GNU_start_file
:
18746 unsigned int bytes_read
;
18749 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18750 mac_ptr
+= bytes_read
;
18751 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18752 mac_ptr
+= bytes_read
;
18754 current_file
= macro_start_file (file
, line
, current_file
,
18755 comp_dir
, lh
, objfile
);
18759 case DW_MACRO_GNU_end_file
:
18760 /* No data to skip by MAC_PTR. */
18763 case DW_MACRO_GNU_define_indirect
:
18764 case DW_MACRO_GNU_undef_indirect
:
18765 case DW_MACRO_GNU_define_indirect_alt
:
18766 case DW_MACRO_GNU_undef_indirect_alt
:
18768 unsigned int bytes_read
;
18770 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18771 mac_ptr
+= bytes_read
;
18772 mac_ptr
+= offset_size
;
18776 case DW_MACRO_GNU_transparent_include
:
18777 case DW_MACRO_GNU_transparent_include_alt
:
18778 /* Note that, according to the spec, a transparent include
18779 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18780 skip this opcode. */
18781 mac_ptr
+= offset_size
;
18784 case DW_MACINFO_vendor_ext
:
18785 /* Only skip the data by MAC_PTR. */
18786 if (!section_is_gnu
)
18788 unsigned int bytes_read
;
18790 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18791 mac_ptr
+= bytes_read
;
18792 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18793 mac_ptr
+= bytes_read
;
18798 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18799 mac_ptr
, mac_end
, abfd
, offset_size
,
18801 if (mac_ptr
== NULL
)
18805 } while (macinfo_type
!= 0 && current_file
== NULL
);
18807 /* Second pass: Process all entries.
18809 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18810 command-line macro definitions/undefinitions. This flag is unset when we
18811 reach the first DW_MACINFO_start_file entry. */
18813 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
18814 NULL
, xcalloc
, xfree
);
18815 cleanup
= make_cleanup_htab_delete (include_hash
);
18816 mac_ptr
= section
->buffer
+ offset
;
18817 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
18819 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
18820 current_file
, lh
, comp_dir
, section
,
18822 offset_size
, objfile
, include_hash
);
18823 do_cleanups (cleanup
);
18826 /* Check if the attribute's form is a DW_FORM_block*
18827 if so return true else false. */
18830 attr_form_is_block (struct attribute
*attr
)
18832 return (attr
== NULL
? 0 :
18833 attr
->form
== DW_FORM_block1
18834 || attr
->form
== DW_FORM_block2
18835 || attr
->form
== DW_FORM_block4
18836 || attr
->form
== DW_FORM_block
18837 || attr
->form
== DW_FORM_exprloc
);
18840 /* Return non-zero if ATTR's value is a section offset --- classes
18841 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18842 You may use DW_UNSND (attr) to retrieve such offsets.
18844 Section 7.5.4, "Attribute Encodings", explains that no attribute
18845 may have a value that belongs to more than one of these classes; it
18846 would be ambiguous if we did, because we use the same forms for all
18850 attr_form_is_section_offset (struct attribute
*attr
)
18852 return (attr
->form
== DW_FORM_data4
18853 || attr
->form
== DW_FORM_data8
18854 || attr
->form
== DW_FORM_sec_offset
);
18857 /* Return non-zero if ATTR's value falls in the 'constant' class, or
18858 zero otherwise. When this function returns true, you can apply
18859 dwarf2_get_attr_constant_value to it.
18861 However, note that for some attributes you must check
18862 attr_form_is_section_offset before using this test. DW_FORM_data4
18863 and DW_FORM_data8 are members of both the constant class, and of
18864 the classes that contain offsets into other debug sections
18865 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
18866 that, if an attribute's can be either a constant or one of the
18867 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
18868 taken as section offsets, not constants. */
18871 attr_form_is_constant (struct attribute
*attr
)
18873 switch (attr
->form
)
18875 case DW_FORM_sdata
:
18876 case DW_FORM_udata
:
18877 case DW_FORM_data1
:
18878 case DW_FORM_data2
:
18879 case DW_FORM_data4
:
18880 case DW_FORM_data8
:
18887 /* Return the .debug_loc section to use for CU.
18888 For DWO files use .debug_loc.dwo. */
18890 static struct dwarf2_section_info
*
18891 cu_debug_loc_section (struct dwarf2_cu
*cu
)
18894 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
18895 return &dwarf2_per_objfile
->loc
;
18898 /* A helper function that fills in a dwarf2_loclist_baton. */
18901 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
18902 struct dwarf2_loclist_baton
*baton
,
18903 struct attribute
*attr
)
18905 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18907 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18909 baton
->per_cu
= cu
->per_cu
;
18910 gdb_assert (baton
->per_cu
);
18911 /* We don't know how long the location list is, but make sure we
18912 don't run off the edge of the section. */
18913 baton
->size
= section
->size
- DW_UNSND (attr
);
18914 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
18915 baton
->base_address
= cu
->base_address
;
18916 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
18920 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
18921 struct dwarf2_cu
*cu
)
18923 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18924 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18926 if (attr_form_is_section_offset (attr
)
18927 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
18928 the section. If so, fall through to the complaint in the
18930 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
18932 struct dwarf2_loclist_baton
*baton
;
18934 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18935 sizeof (struct dwarf2_loclist_baton
));
18937 fill_in_loclist_baton (cu
, baton
, attr
);
18939 if (cu
->base_known
== 0)
18940 complaint (&symfile_complaints
,
18941 _("Location list used without "
18942 "specifying the CU base address."));
18944 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
18945 SYMBOL_LOCATION_BATON (sym
) = baton
;
18949 struct dwarf2_locexpr_baton
*baton
;
18951 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18952 sizeof (struct dwarf2_locexpr_baton
));
18953 baton
->per_cu
= cu
->per_cu
;
18954 gdb_assert (baton
->per_cu
);
18956 if (attr_form_is_block (attr
))
18958 /* Note that we're just copying the block's data pointer
18959 here, not the actual data. We're still pointing into the
18960 info_buffer for SYM's objfile; right now we never release
18961 that buffer, but when we do clean up properly this may
18963 baton
->size
= DW_BLOCK (attr
)->size
;
18964 baton
->data
= DW_BLOCK (attr
)->data
;
18968 dwarf2_invalid_attrib_class_complaint ("location description",
18969 SYMBOL_NATURAL_NAME (sym
));
18973 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
18974 SYMBOL_LOCATION_BATON (sym
) = baton
;
18978 /* Return the OBJFILE associated with the compilation unit CU. If CU
18979 came from a separate debuginfo file, then the master objfile is
18983 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
18985 struct objfile
*objfile
= per_cu
->objfile
;
18987 /* Return the master objfile, so that we can report and look up the
18988 correct file containing this variable. */
18989 if (objfile
->separate_debug_objfile_backlink
)
18990 objfile
= objfile
->separate_debug_objfile_backlink
;
18995 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
18996 (CU_HEADERP is unused in such case) or prepare a temporary copy at
18997 CU_HEADERP first. */
18999 static const struct comp_unit_head
*
19000 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19001 struct dwarf2_per_cu_data
*per_cu
)
19003 gdb_byte
*info_ptr
;
19006 return &per_cu
->cu
->header
;
19008 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
19010 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19011 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19016 /* Return the address size given in the compilation unit header for CU. */
19019 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19021 struct comp_unit_head cu_header_local
;
19022 const struct comp_unit_head
*cu_headerp
;
19024 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19026 return cu_headerp
->addr_size
;
19029 /* Return the offset size given in the compilation unit header for CU. */
19032 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19034 struct comp_unit_head cu_header_local
;
19035 const struct comp_unit_head
*cu_headerp
;
19037 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19039 return cu_headerp
->offset_size
;
19042 /* See its dwarf2loc.h declaration. */
19045 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19047 struct comp_unit_head cu_header_local
;
19048 const struct comp_unit_head
*cu_headerp
;
19050 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19052 if (cu_headerp
->version
== 2)
19053 return cu_headerp
->addr_size
;
19055 return cu_headerp
->offset_size
;
19058 /* Return the text offset of the CU. The returned offset comes from
19059 this CU's objfile. If this objfile came from a separate debuginfo
19060 file, then the offset may be different from the corresponding
19061 offset in the parent objfile. */
19064 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19066 struct objfile
*objfile
= per_cu
->objfile
;
19068 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19071 /* Locate the .debug_info compilation unit from CU's objfile which contains
19072 the DIE at OFFSET. Raises an error on failure. */
19074 static struct dwarf2_per_cu_data
*
19075 dwarf2_find_containing_comp_unit (sect_offset offset
,
19076 unsigned int offset_in_dwz
,
19077 struct objfile
*objfile
)
19079 struct dwarf2_per_cu_data
*this_cu
;
19081 const sect_offset
*cu_off
;
19084 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19087 struct dwarf2_per_cu_data
*mid_cu
;
19088 int mid
= low
+ (high
- low
) / 2;
19090 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19091 cu_off
= &mid_cu
->offset
;
19092 if (mid_cu
->is_dwz
> offset_in_dwz
19093 || (mid_cu
->is_dwz
== offset_in_dwz
19094 && cu_off
->sect_off
>= offset
.sect_off
))
19099 gdb_assert (low
== high
);
19100 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19101 cu_off
= &this_cu
->offset
;
19102 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19104 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19105 error (_("Dwarf Error: could not find partial DIE containing "
19106 "offset 0x%lx [in module %s]"),
19107 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19109 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19110 <= offset
.sect_off
);
19111 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19115 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19116 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19117 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19118 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19119 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19124 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19127 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19129 memset (cu
, 0, sizeof (*cu
));
19131 cu
->per_cu
= per_cu
;
19132 cu
->objfile
= per_cu
->objfile
;
19133 obstack_init (&cu
->comp_unit_obstack
);
19136 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19139 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19140 enum language pretend_language
)
19142 struct attribute
*attr
;
19144 /* Set the language we're debugging. */
19145 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19147 set_cu_language (DW_UNSND (attr
), cu
);
19150 cu
->language
= pretend_language
;
19151 cu
->language_defn
= language_def (cu
->language
);
19154 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19156 cu
->producer
= DW_STRING (attr
);
19159 /* Release one cached compilation unit, CU. We unlink it from the tree
19160 of compilation units, but we don't remove it from the read_in_chain;
19161 the caller is responsible for that.
19162 NOTE: DATA is a void * because this function is also used as a
19163 cleanup routine. */
19166 free_heap_comp_unit (void *data
)
19168 struct dwarf2_cu
*cu
= data
;
19170 gdb_assert (cu
->per_cu
!= NULL
);
19171 cu
->per_cu
->cu
= NULL
;
19174 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19179 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19180 when we're finished with it. We can't free the pointer itself, but be
19181 sure to unlink it from the cache. Also release any associated storage. */
19184 free_stack_comp_unit (void *data
)
19186 struct dwarf2_cu
*cu
= data
;
19188 gdb_assert (cu
->per_cu
!= NULL
);
19189 cu
->per_cu
->cu
= NULL
;
19192 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19193 cu
->partial_dies
= NULL
;
19196 /* Free all cached compilation units. */
19199 free_cached_comp_units (void *data
)
19201 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19203 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19204 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19205 while (per_cu
!= NULL
)
19207 struct dwarf2_per_cu_data
*next_cu
;
19209 next_cu
= per_cu
->cu
->read_in_chain
;
19211 free_heap_comp_unit (per_cu
->cu
);
19212 *last_chain
= next_cu
;
19218 /* Increase the age counter on each cached compilation unit, and free
19219 any that are too old. */
19222 age_cached_comp_units (void)
19224 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19226 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19227 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19228 while (per_cu
!= NULL
)
19230 per_cu
->cu
->last_used
++;
19231 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19232 dwarf2_mark (per_cu
->cu
);
19233 per_cu
= per_cu
->cu
->read_in_chain
;
19236 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19237 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19238 while (per_cu
!= NULL
)
19240 struct dwarf2_per_cu_data
*next_cu
;
19242 next_cu
= per_cu
->cu
->read_in_chain
;
19244 if (!per_cu
->cu
->mark
)
19246 free_heap_comp_unit (per_cu
->cu
);
19247 *last_chain
= next_cu
;
19250 last_chain
= &per_cu
->cu
->read_in_chain
;
19256 /* Remove a single compilation unit from the cache. */
19259 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19261 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19263 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19264 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19265 while (per_cu
!= NULL
)
19267 struct dwarf2_per_cu_data
*next_cu
;
19269 next_cu
= per_cu
->cu
->read_in_chain
;
19271 if (per_cu
== target_per_cu
)
19273 free_heap_comp_unit (per_cu
->cu
);
19275 *last_chain
= next_cu
;
19279 last_chain
= &per_cu
->cu
->read_in_chain
;
19285 /* Release all extra memory associated with OBJFILE. */
19288 dwarf2_free_objfile (struct objfile
*objfile
)
19290 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19292 if (dwarf2_per_objfile
== NULL
)
19295 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19296 free_cached_comp_units (NULL
);
19298 if (dwarf2_per_objfile
->quick_file_names_table
)
19299 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19301 /* Everything else should be on the objfile obstack. */
19304 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19305 We store these in a hash table separate from the DIEs, and preserve them
19306 when the DIEs are flushed out of cache.
19308 The CU "per_cu" pointer is needed because offset alone is not enough to
19309 uniquely identify the type. A file may have multiple .debug_types sections,
19310 or the type may come from a DWO file. We have to use something in
19311 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19312 routine, get_die_type_at_offset, from outside this file, and thus won't
19313 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19316 struct dwarf2_per_cu_offset_and_type
19318 const struct dwarf2_per_cu_data
*per_cu
;
19319 sect_offset offset
;
19323 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19326 per_cu_offset_and_type_hash (const void *item
)
19328 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19330 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19333 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19336 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19338 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19339 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19341 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19342 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19345 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19346 table if necessary. For convenience, return TYPE.
19348 The DIEs reading must have careful ordering to:
19349 * Not cause infite loops trying to read in DIEs as a prerequisite for
19350 reading current DIE.
19351 * Not trying to dereference contents of still incompletely read in types
19352 while reading in other DIEs.
19353 * Enable referencing still incompletely read in types just by a pointer to
19354 the type without accessing its fields.
19356 Therefore caller should follow these rules:
19357 * Try to fetch any prerequisite types we may need to build this DIE type
19358 before building the type and calling set_die_type.
19359 * After building type call set_die_type for current DIE as soon as
19360 possible before fetching more types to complete the current type.
19361 * Make the type as complete as possible before fetching more types. */
19363 static struct type
*
19364 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19366 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19367 struct objfile
*objfile
= cu
->objfile
;
19369 /* For Ada types, make sure that the gnat-specific data is always
19370 initialized (if not already set). There are a few types where
19371 we should not be doing so, because the type-specific area is
19372 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19373 where the type-specific area is used to store the floatformat).
19374 But this is not a problem, because the gnat-specific information
19375 is actually not needed for these types. */
19376 if (need_gnat_info (cu
)
19377 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19378 && TYPE_CODE (type
) != TYPE_CODE_FLT
19379 && !HAVE_GNAT_AUX_INFO (type
))
19380 INIT_GNAT_SPECIFIC (type
);
19382 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19384 dwarf2_per_objfile
->die_type_hash
=
19385 htab_create_alloc_ex (127,
19386 per_cu_offset_and_type_hash
,
19387 per_cu_offset_and_type_eq
,
19389 &objfile
->objfile_obstack
,
19390 hashtab_obstack_allocate
,
19391 dummy_obstack_deallocate
);
19394 ofs
.per_cu
= cu
->per_cu
;
19395 ofs
.offset
= die
->offset
;
19397 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19398 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19400 complaint (&symfile_complaints
,
19401 _("A problem internal to GDB: DIE 0x%x has type already set"),
19402 die
->offset
.sect_off
);
19403 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19408 /* Look up the type for the die at OFFSET in the appropriate type_hash
19409 table, or return NULL if the die does not have a saved type. */
19411 static struct type
*
19412 get_die_type_at_offset (sect_offset offset
,
19413 struct dwarf2_per_cu_data
*per_cu
)
19415 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19417 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19420 ofs
.per_cu
= per_cu
;
19421 ofs
.offset
= offset
;
19422 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19429 /* Look up the type for DIE in the appropriate type_hash table,
19430 or return NULL if DIE does not have a saved type. */
19432 static struct type
*
19433 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19435 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19438 /* Add a dependence relationship from CU to REF_PER_CU. */
19441 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19442 struct dwarf2_per_cu_data
*ref_per_cu
)
19446 if (cu
->dependencies
== NULL
)
19448 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19449 NULL
, &cu
->comp_unit_obstack
,
19450 hashtab_obstack_allocate
,
19451 dummy_obstack_deallocate
);
19453 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19455 *slot
= ref_per_cu
;
19458 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19459 Set the mark field in every compilation unit in the
19460 cache that we must keep because we are keeping CU. */
19463 dwarf2_mark_helper (void **slot
, void *data
)
19465 struct dwarf2_per_cu_data
*per_cu
;
19467 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19469 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19470 reading of the chain. As such dependencies remain valid it is not much
19471 useful to track and undo them during QUIT cleanups. */
19472 if (per_cu
->cu
== NULL
)
19475 if (per_cu
->cu
->mark
)
19477 per_cu
->cu
->mark
= 1;
19479 if (per_cu
->cu
->dependencies
!= NULL
)
19480 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19485 /* Set the mark field in CU and in every other compilation unit in the
19486 cache that we must keep because we are keeping CU. */
19489 dwarf2_mark (struct dwarf2_cu
*cu
)
19494 if (cu
->dependencies
!= NULL
)
19495 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19499 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19503 per_cu
->cu
->mark
= 0;
19504 per_cu
= per_cu
->cu
->read_in_chain
;
19508 /* Trivial hash function for partial_die_info: the hash value of a DIE
19509 is its offset in .debug_info for this objfile. */
19512 partial_die_hash (const void *item
)
19514 const struct partial_die_info
*part_die
= item
;
19516 return part_die
->offset
.sect_off
;
19519 /* Trivial comparison function for partial_die_info structures: two DIEs
19520 are equal if they have the same offset. */
19523 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19525 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19526 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19528 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19531 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19532 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19535 set_dwarf2_cmd (char *args
, int from_tty
)
19537 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19541 show_dwarf2_cmd (char *args
, int from_tty
)
19543 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19546 /* Free data associated with OBJFILE, if necessary. */
19549 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19551 struct dwarf2_per_objfile
*data
= d
;
19554 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19555 VEC_free (dwarf2_per_cu_ptr
,
19556 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
19558 VEC_free (dwarf2_section_info_def
, data
->types
);
19560 if (data
->dwo_files
)
19561 free_dwo_files (data
->dwo_files
, objfile
);
19563 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19564 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19568 /* The "save gdb-index" command. */
19570 /* The contents of the hash table we create when building the string
19572 struct strtab_entry
19574 offset_type offset
;
19578 /* Hash function for a strtab_entry.
19580 Function is used only during write_hash_table so no index format backward
19581 compatibility is needed. */
19584 hash_strtab_entry (const void *e
)
19586 const struct strtab_entry
*entry
= e
;
19587 return mapped_index_string_hash (INT_MAX
, entry
->str
);
19590 /* Equality function for a strtab_entry. */
19593 eq_strtab_entry (const void *a
, const void *b
)
19595 const struct strtab_entry
*ea
= a
;
19596 const struct strtab_entry
*eb
= b
;
19597 return !strcmp (ea
->str
, eb
->str
);
19600 /* Create a strtab_entry hash table. */
19603 create_strtab (void)
19605 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
19606 xfree
, xcalloc
, xfree
);
19609 /* Add a string to the constant pool. Return the string's offset in
19613 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
19616 struct strtab_entry entry
;
19617 struct strtab_entry
*result
;
19620 slot
= htab_find_slot (table
, &entry
, INSERT
);
19625 result
= XNEW (struct strtab_entry
);
19626 result
->offset
= obstack_object_size (cpool
);
19628 obstack_grow_str0 (cpool
, str
);
19631 return result
->offset
;
19634 /* An entry in the symbol table. */
19635 struct symtab_index_entry
19637 /* The name of the symbol. */
19639 /* The offset of the name in the constant pool. */
19640 offset_type index_offset
;
19641 /* A sorted vector of the indices of all the CUs that hold an object
19643 VEC (offset_type
) *cu_indices
;
19646 /* The symbol table. This is a power-of-2-sized hash table. */
19647 struct mapped_symtab
19649 offset_type n_elements
;
19651 struct symtab_index_entry
**data
;
19654 /* Hash function for a symtab_index_entry. */
19657 hash_symtab_entry (const void *e
)
19659 const struct symtab_index_entry
*entry
= e
;
19660 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
19661 sizeof (offset_type
) * VEC_length (offset_type
,
19662 entry
->cu_indices
),
19666 /* Equality function for a symtab_index_entry. */
19669 eq_symtab_entry (const void *a
, const void *b
)
19671 const struct symtab_index_entry
*ea
= a
;
19672 const struct symtab_index_entry
*eb
= b
;
19673 int len
= VEC_length (offset_type
, ea
->cu_indices
);
19674 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
19676 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
19677 VEC_address (offset_type
, eb
->cu_indices
),
19678 sizeof (offset_type
) * len
);
19681 /* Destroy a symtab_index_entry. */
19684 delete_symtab_entry (void *p
)
19686 struct symtab_index_entry
*entry
= p
;
19687 VEC_free (offset_type
, entry
->cu_indices
);
19691 /* Create a hash table holding symtab_index_entry objects. */
19694 create_symbol_hash_table (void)
19696 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
19697 delete_symtab_entry
, xcalloc
, xfree
);
19700 /* Create a new mapped symtab object. */
19702 static struct mapped_symtab
*
19703 create_mapped_symtab (void)
19705 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
19706 symtab
->n_elements
= 0;
19707 symtab
->size
= 1024;
19708 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19712 /* Destroy a mapped_symtab. */
19715 cleanup_mapped_symtab (void *p
)
19717 struct mapped_symtab
*symtab
= p
;
19718 /* The contents of the array are freed when the other hash table is
19720 xfree (symtab
->data
);
19724 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19727 Function is used only during write_hash_table so no index format backward
19728 compatibility is needed. */
19730 static struct symtab_index_entry
**
19731 find_slot (struct mapped_symtab
*symtab
, const char *name
)
19733 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
19735 index
= hash
& (symtab
->size
- 1);
19736 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
19740 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
19741 return &symtab
->data
[index
];
19742 index
= (index
+ step
) & (symtab
->size
- 1);
19746 /* Expand SYMTAB's hash table. */
19749 hash_expand (struct mapped_symtab
*symtab
)
19751 offset_type old_size
= symtab
->size
;
19753 struct symtab_index_entry
**old_entries
= symtab
->data
;
19756 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19758 for (i
= 0; i
< old_size
; ++i
)
19760 if (old_entries
[i
])
19762 struct symtab_index_entry
**slot
= find_slot (symtab
,
19763 old_entries
[i
]->name
);
19764 *slot
= old_entries
[i
];
19768 xfree (old_entries
);
19771 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19772 CU_INDEX is the index of the CU in which the symbol appears.
19773 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19776 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
19777 int is_static
, gdb_index_symbol_kind kind
,
19778 offset_type cu_index
)
19780 struct symtab_index_entry
**slot
;
19781 offset_type cu_index_and_attrs
;
19783 ++symtab
->n_elements
;
19784 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
19785 hash_expand (symtab
);
19787 slot
= find_slot (symtab
, name
);
19790 *slot
= XNEW (struct symtab_index_entry
);
19791 (*slot
)->name
= name
;
19792 /* index_offset is set later. */
19793 (*slot
)->cu_indices
= NULL
;
19796 cu_index_and_attrs
= 0;
19797 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
19798 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
19799 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
19801 /* We don't want to record an index value twice as we want to avoid the
19803 We process all global symbols and then all static symbols
19804 (which would allow us to avoid the duplication by only having to check
19805 the last entry pushed), but a symbol could have multiple kinds in one CU.
19806 To keep things simple we don't worry about the duplication here and
19807 sort and uniqufy the list after we've processed all symbols. */
19808 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
19811 /* qsort helper routine for uniquify_cu_indices. */
19814 offset_type_compare (const void *ap
, const void *bp
)
19816 offset_type a
= *(offset_type
*) ap
;
19817 offset_type b
= *(offset_type
*) bp
;
19819 return (a
> b
) - (b
> a
);
19822 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19825 uniquify_cu_indices (struct mapped_symtab
*symtab
)
19829 for (i
= 0; i
< symtab
->size
; ++i
)
19831 struct symtab_index_entry
*entry
= symtab
->data
[i
];
19834 && entry
->cu_indices
!= NULL
)
19836 unsigned int next_to_insert
, next_to_check
;
19837 offset_type last_value
;
19839 qsort (VEC_address (offset_type
, entry
->cu_indices
),
19840 VEC_length (offset_type
, entry
->cu_indices
),
19841 sizeof (offset_type
), offset_type_compare
);
19843 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
19844 next_to_insert
= 1;
19845 for (next_to_check
= 1;
19846 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
19849 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
19852 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
19854 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
19859 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
19864 /* Add a vector of indices to the constant pool. */
19867 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
19868 struct symtab_index_entry
*entry
)
19872 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
19875 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
19876 offset_type val
= MAYBE_SWAP (len
);
19881 entry
->index_offset
= obstack_object_size (cpool
);
19883 obstack_grow (cpool
, &val
, sizeof (val
));
19885 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
19888 val
= MAYBE_SWAP (iter
);
19889 obstack_grow (cpool
, &val
, sizeof (val
));
19894 struct symtab_index_entry
*old_entry
= *slot
;
19895 entry
->index_offset
= old_entry
->index_offset
;
19898 return entry
->index_offset
;
19901 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
19902 constant pool entries going into the obstack CPOOL. */
19905 write_hash_table (struct mapped_symtab
*symtab
,
19906 struct obstack
*output
, struct obstack
*cpool
)
19909 htab_t symbol_hash_table
;
19912 symbol_hash_table
= create_symbol_hash_table ();
19913 str_table
= create_strtab ();
19915 /* We add all the index vectors to the constant pool first, to
19916 ensure alignment is ok. */
19917 for (i
= 0; i
< symtab
->size
; ++i
)
19919 if (symtab
->data
[i
])
19920 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
19923 /* Now write out the hash table. */
19924 for (i
= 0; i
< symtab
->size
; ++i
)
19926 offset_type str_off
, vec_off
;
19928 if (symtab
->data
[i
])
19930 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
19931 vec_off
= symtab
->data
[i
]->index_offset
;
19935 /* While 0 is a valid constant pool index, it is not valid
19936 to have 0 for both offsets. */
19941 str_off
= MAYBE_SWAP (str_off
);
19942 vec_off
= MAYBE_SWAP (vec_off
);
19944 obstack_grow (output
, &str_off
, sizeof (str_off
));
19945 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
19948 htab_delete (str_table
);
19949 htab_delete (symbol_hash_table
);
19952 /* Struct to map psymtab to CU index in the index file. */
19953 struct psymtab_cu_index_map
19955 struct partial_symtab
*psymtab
;
19956 unsigned int cu_index
;
19960 hash_psymtab_cu_index (const void *item
)
19962 const struct psymtab_cu_index_map
*map
= item
;
19964 return htab_hash_pointer (map
->psymtab
);
19968 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
19970 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
19971 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
19973 return lhs
->psymtab
== rhs
->psymtab
;
19976 /* Helper struct for building the address table. */
19977 struct addrmap_index_data
19979 struct objfile
*objfile
;
19980 struct obstack
*addr_obstack
;
19981 htab_t cu_index_htab
;
19983 /* Non-zero if the previous_* fields are valid.
19984 We can't write an entry until we see the next entry (since it is only then
19985 that we know the end of the entry). */
19986 int previous_valid
;
19987 /* Index of the CU in the table of all CUs in the index file. */
19988 unsigned int previous_cu_index
;
19989 /* Start address of the CU. */
19990 CORE_ADDR previous_cu_start
;
19993 /* Write an address entry to OBSTACK. */
19996 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
19997 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
19999 offset_type cu_index_to_write
;
20001 CORE_ADDR baseaddr
;
20003 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20005 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20006 obstack_grow (obstack
, addr
, 8);
20007 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20008 obstack_grow (obstack
, addr
, 8);
20009 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20010 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20013 /* Worker function for traversing an addrmap to build the address table. */
20016 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20018 struct addrmap_index_data
*data
= datap
;
20019 struct partial_symtab
*pst
= obj
;
20021 if (data
->previous_valid
)
20022 add_address_entry (data
->objfile
, data
->addr_obstack
,
20023 data
->previous_cu_start
, start_addr
,
20024 data
->previous_cu_index
);
20026 data
->previous_cu_start
= start_addr
;
20029 struct psymtab_cu_index_map find_map
, *map
;
20030 find_map
.psymtab
= pst
;
20031 map
= htab_find (data
->cu_index_htab
, &find_map
);
20032 gdb_assert (map
!= NULL
);
20033 data
->previous_cu_index
= map
->cu_index
;
20034 data
->previous_valid
= 1;
20037 data
->previous_valid
= 0;
20042 /* Write OBJFILE's address map to OBSTACK.
20043 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20044 in the index file. */
20047 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20048 htab_t cu_index_htab
)
20050 struct addrmap_index_data addrmap_index_data
;
20052 /* When writing the address table, we have to cope with the fact that
20053 the addrmap iterator only provides the start of a region; we have to
20054 wait until the next invocation to get the start of the next region. */
20056 addrmap_index_data
.objfile
= objfile
;
20057 addrmap_index_data
.addr_obstack
= obstack
;
20058 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20059 addrmap_index_data
.previous_valid
= 0;
20061 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20062 &addrmap_index_data
);
20064 /* It's highly unlikely the last entry (end address = 0xff...ff)
20065 is valid, but we should still handle it.
20066 The end address is recorded as the start of the next region, but that
20067 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20069 if (addrmap_index_data
.previous_valid
)
20070 add_address_entry (objfile
, obstack
,
20071 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20072 addrmap_index_data
.previous_cu_index
);
20075 /* Return the symbol kind of PSYM. */
20077 static gdb_index_symbol_kind
20078 symbol_kind (struct partial_symbol
*psym
)
20080 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20081 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20089 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20091 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20093 case LOC_CONST_BYTES
:
20094 case LOC_OPTIMIZED_OUT
:
20096 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20098 /* Note: It's currently impossible to recognize psyms as enum values
20099 short of reading the type info. For now punt. */
20100 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20102 /* There are other LOC_FOO values that one might want to classify
20103 as variables, but dwarf2read.c doesn't currently use them. */
20104 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20106 case STRUCT_DOMAIN
:
20107 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20109 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20113 /* Add a list of partial symbols to SYMTAB. */
20116 write_psymbols (struct mapped_symtab
*symtab
,
20118 struct partial_symbol
**psymp
,
20120 offset_type cu_index
,
20123 for (; count
-- > 0; ++psymp
)
20125 struct partial_symbol
*psym
= *psymp
;
20128 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20129 error (_("Ada is not currently supported by the index"));
20131 /* Only add a given psymbol once. */
20132 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20135 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20138 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20139 is_static
, kind
, cu_index
);
20144 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20145 exception if there is an error. */
20148 write_obstack (FILE *file
, struct obstack
*obstack
)
20150 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20152 != obstack_object_size (obstack
))
20153 error (_("couldn't data write to file"));
20156 /* Unlink a file if the argument is not NULL. */
20159 unlink_if_set (void *p
)
20161 char **filename
= p
;
20163 unlink (*filename
);
20166 /* A helper struct used when iterating over debug_types. */
20167 struct signatured_type_index_data
20169 struct objfile
*objfile
;
20170 struct mapped_symtab
*symtab
;
20171 struct obstack
*types_list
;
20176 /* A helper function that writes a single signatured_type to an
20180 write_one_signatured_type (void **slot
, void *d
)
20182 struct signatured_type_index_data
*info
= d
;
20183 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20184 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
20185 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20188 write_psymbols (info
->symtab
,
20190 info
->objfile
->global_psymbols
.list
20191 + psymtab
->globals_offset
,
20192 psymtab
->n_global_syms
, info
->cu_index
,
20194 write_psymbols (info
->symtab
,
20196 info
->objfile
->static_psymbols
.list
20197 + psymtab
->statics_offset
,
20198 psymtab
->n_static_syms
, info
->cu_index
,
20201 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20202 entry
->per_cu
.offset
.sect_off
);
20203 obstack_grow (info
->types_list
, val
, 8);
20204 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20205 entry
->type_offset_in_tu
.cu_off
);
20206 obstack_grow (info
->types_list
, val
, 8);
20207 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20208 obstack_grow (info
->types_list
, val
, 8);
20215 /* Recurse into all "included" dependencies and write their symbols as
20216 if they appeared in this psymtab. */
20219 recursively_write_psymbols (struct objfile
*objfile
,
20220 struct partial_symtab
*psymtab
,
20221 struct mapped_symtab
*symtab
,
20223 offset_type cu_index
)
20227 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20228 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20229 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20230 symtab
, psyms_seen
, cu_index
);
20232 write_psymbols (symtab
,
20234 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20235 psymtab
->n_global_syms
, cu_index
,
20237 write_psymbols (symtab
,
20239 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20240 psymtab
->n_static_syms
, cu_index
,
20244 /* Create an index file for OBJFILE in the directory DIR. */
20247 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20249 struct cleanup
*cleanup
;
20250 char *filename
, *cleanup_filename
;
20251 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20252 struct obstack cu_list
, types_cu_list
;
20255 struct mapped_symtab
*symtab
;
20256 offset_type val
, size_of_contents
, total_len
;
20259 htab_t cu_index_htab
;
20260 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20262 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20265 if (dwarf2_per_objfile
->using_index
)
20266 error (_("Cannot use an index to create the index"));
20268 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20269 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20271 if (stat (objfile
->name
, &st
) < 0)
20272 perror_with_name (objfile
->name
);
20274 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20275 INDEX_SUFFIX
, (char *) NULL
);
20276 cleanup
= make_cleanup (xfree
, filename
);
20278 out_file
= fopen (filename
, "wb");
20280 error (_("Can't open `%s' for writing"), filename
);
20282 cleanup_filename
= filename
;
20283 make_cleanup (unlink_if_set
, &cleanup_filename
);
20285 symtab
= create_mapped_symtab ();
20286 make_cleanup (cleanup_mapped_symtab
, symtab
);
20288 obstack_init (&addr_obstack
);
20289 make_cleanup_obstack_free (&addr_obstack
);
20291 obstack_init (&cu_list
);
20292 make_cleanup_obstack_free (&cu_list
);
20294 obstack_init (&types_cu_list
);
20295 make_cleanup_obstack_free (&types_cu_list
);
20297 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20298 NULL
, xcalloc
, xfree
);
20299 make_cleanup_htab_delete (psyms_seen
);
20301 /* While we're scanning CU's create a table that maps a psymtab pointer
20302 (which is what addrmap records) to its index (which is what is recorded
20303 in the index file). This will later be needed to write the address
20305 cu_index_htab
= htab_create_alloc (100,
20306 hash_psymtab_cu_index
,
20307 eq_psymtab_cu_index
,
20308 NULL
, xcalloc
, xfree
);
20309 make_cleanup_htab_delete (cu_index_htab
);
20310 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20311 xmalloc (sizeof (struct psymtab_cu_index_map
)
20312 * dwarf2_per_objfile
->n_comp_units
);
20313 make_cleanup (xfree
, psymtab_cu_index_map
);
20315 /* The CU list is already sorted, so we don't need to do additional
20316 work here. Also, the debug_types entries do not appear in
20317 all_comp_units, but only in their own hash table. */
20318 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20320 struct dwarf2_per_cu_data
*per_cu
20321 = dwarf2_per_objfile
->all_comp_units
[i
];
20322 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20324 struct psymtab_cu_index_map
*map
;
20327 if (psymtab
->user
== NULL
)
20328 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20330 map
= &psymtab_cu_index_map
[i
];
20331 map
->psymtab
= psymtab
;
20333 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20334 gdb_assert (slot
!= NULL
);
20335 gdb_assert (*slot
== NULL
);
20338 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20339 per_cu
->offset
.sect_off
);
20340 obstack_grow (&cu_list
, val
, 8);
20341 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20342 obstack_grow (&cu_list
, val
, 8);
20345 /* Dump the address map. */
20346 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20348 /* Write out the .debug_type entries, if any. */
20349 if (dwarf2_per_objfile
->signatured_types
)
20351 struct signatured_type_index_data sig_data
;
20353 sig_data
.objfile
= objfile
;
20354 sig_data
.symtab
= symtab
;
20355 sig_data
.types_list
= &types_cu_list
;
20356 sig_data
.psyms_seen
= psyms_seen
;
20357 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20358 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20359 write_one_signatured_type
, &sig_data
);
20362 /* Now that we've processed all symbols we can shrink their cu_indices
20364 uniquify_cu_indices (symtab
);
20366 obstack_init (&constant_pool
);
20367 make_cleanup_obstack_free (&constant_pool
);
20368 obstack_init (&symtab_obstack
);
20369 make_cleanup_obstack_free (&symtab_obstack
);
20370 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20372 obstack_init (&contents
);
20373 make_cleanup_obstack_free (&contents
);
20374 size_of_contents
= 6 * sizeof (offset_type
);
20375 total_len
= size_of_contents
;
20377 /* The version number. */
20378 val
= MAYBE_SWAP (7);
20379 obstack_grow (&contents
, &val
, sizeof (val
));
20381 /* The offset of the CU list from the start of the file. */
20382 val
= MAYBE_SWAP (total_len
);
20383 obstack_grow (&contents
, &val
, sizeof (val
));
20384 total_len
+= obstack_object_size (&cu_list
);
20386 /* The offset of the types CU list from the start of the file. */
20387 val
= MAYBE_SWAP (total_len
);
20388 obstack_grow (&contents
, &val
, sizeof (val
));
20389 total_len
+= obstack_object_size (&types_cu_list
);
20391 /* The offset of the address table from the start of the file. */
20392 val
= MAYBE_SWAP (total_len
);
20393 obstack_grow (&contents
, &val
, sizeof (val
));
20394 total_len
+= obstack_object_size (&addr_obstack
);
20396 /* The offset of the symbol table from the start of the file. */
20397 val
= MAYBE_SWAP (total_len
);
20398 obstack_grow (&contents
, &val
, sizeof (val
));
20399 total_len
+= obstack_object_size (&symtab_obstack
);
20401 /* The offset of the constant pool from the start of the file. */
20402 val
= MAYBE_SWAP (total_len
);
20403 obstack_grow (&contents
, &val
, sizeof (val
));
20404 total_len
+= obstack_object_size (&constant_pool
);
20406 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20408 write_obstack (out_file
, &contents
);
20409 write_obstack (out_file
, &cu_list
);
20410 write_obstack (out_file
, &types_cu_list
);
20411 write_obstack (out_file
, &addr_obstack
);
20412 write_obstack (out_file
, &symtab_obstack
);
20413 write_obstack (out_file
, &constant_pool
);
20417 /* We want to keep the file, so we set cleanup_filename to NULL
20418 here. See unlink_if_set. */
20419 cleanup_filename
= NULL
;
20421 do_cleanups (cleanup
);
20424 /* Implementation of the `save gdb-index' command.
20426 Note that the file format used by this command is documented in the
20427 GDB manual. Any changes here must be documented there. */
20430 save_gdb_index_command (char *arg
, int from_tty
)
20432 struct objfile
*objfile
;
20435 error (_("usage: save gdb-index DIRECTORY"));
20437 ALL_OBJFILES (objfile
)
20441 /* If the objfile does not correspond to an actual file, skip it. */
20442 if (stat (objfile
->name
, &st
) < 0)
20445 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20446 if (dwarf2_per_objfile
)
20448 volatile struct gdb_exception except
;
20450 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20452 write_psymtabs_to_index (objfile
, arg
);
20454 if (except
.reason
< 0)
20455 exception_fprintf (gdb_stderr
, except
,
20456 _("Error while writing index for `%s': "),
20464 int dwarf2_always_disassemble
;
20467 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20468 struct cmd_list_element
*c
, const char *value
)
20470 fprintf_filtered (file
,
20471 _("Whether to always disassemble "
20472 "DWARF expressions is %s.\n"),
20477 show_check_physname (struct ui_file
*file
, int from_tty
,
20478 struct cmd_list_element
*c
, const char *value
)
20480 fprintf_filtered (file
,
20481 _("Whether to check \"physname\" is %s.\n"),
20485 void _initialize_dwarf2_read (void);
20488 _initialize_dwarf2_read (void)
20490 struct cmd_list_element
*c
;
20492 dwarf2_objfile_data_key
20493 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20495 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20496 Set DWARF 2 specific variables.\n\
20497 Configure DWARF 2 variables such as the cache size"),
20498 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20499 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20501 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20502 Show DWARF 2 specific variables\n\
20503 Show DWARF 2 variables such as the cache size"),
20504 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20505 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20507 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20508 &dwarf2_max_cache_age
, _("\
20509 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20510 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20511 A higher limit means that cached compilation units will be stored\n\
20512 in memory longer, and more total memory will be used. Zero disables\n\
20513 caching, which can slow down startup."),
20515 show_dwarf2_max_cache_age
,
20516 &set_dwarf2_cmdlist
,
20517 &show_dwarf2_cmdlist
);
20519 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20520 &dwarf2_always_disassemble
, _("\
20521 Set whether `info address' always disassembles DWARF expressions."), _("\
20522 Show whether `info address' always disassembles DWARF expressions."), _("\
20523 When enabled, DWARF expressions are always printed in an assembly-like\n\
20524 syntax. When disabled, expressions will be printed in a more\n\
20525 conversational style, when possible."),
20527 show_dwarf2_always_disassemble
,
20528 &set_dwarf2_cmdlist
,
20529 &show_dwarf2_cmdlist
);
20531 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20532 Set debugging of the dwarf2 reader."), _("\
20533 Show debugging of the dwarf2 reader."), _("\
20534 When enabled, debugging messages are printed during dwarf2 reading\n\
20535 and symtab expansion."),
20538 &setdebuglist
, &showdebuglist
);
20540 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20541 Set debugging of the dwarf2 DIE reader."), _("\
20542 Show debugging of the dwarf2 DIE reader."), _("\
20543 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20544 The value is the maximum depth to print."),
20547 &setdebuglist
, &showdebuglist
);
20549 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20550 Set cross-checking of \"physname\" code against demangler."), _("\
20551 Show cross-checking of \"physname\" code against demangler."), _("\
20552 When enabled, GDB's internal \"physname\" code is checked against\n\
20554 NULL
, show_check_physname
,
20555 &setdebuglist
, &showdebuglist
);
20557 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20558 no_class
, &use_deprecated_index_sections
, _("\
20559 Set whether to use deprecated gdb_index sections."), _("\
20560 Show whether to use deprecated gdb_index sections."), _("\
20561 When enabled, deprecated .gdb_index sections are used anyway.\n\
20562 Normally they are ignored either because of a missing feature or\n\
20563 performance issue.\n\
20564 Warning: This option must be enabled before gdb reads the file."),
20567 &setlist
, &showlist
);
20569 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20571 Save a gdb-index file.\n\
20572 Usage: save gdb-index DIRECTORY"),
20574 set_cmd_completer (c
, filename_completer
);