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 : cu
->objfile
->name
),
6738 this_package_name
, package_name
);
6739 xfree (this_package_name
);
6745 if (package_name
!= NULL
)
6747 struct objfile
*objfile
= cu
->objfile
;
6748 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6749 package_name
, objfile
);
6752 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6754 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6755 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6756 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
6757 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6758 e.g., "main" finds the "main" module and not C's main(). */
6759 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6760 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6761 SYMBOL_TYPE (sym
) = type
;
6763 add_symbol_to_list (sym
, &global_symbols
);
6765 xfree (package_name
);
6769 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6771 /* Return the symtab for PER_CU. This works properly regardless of
6772 whether we're using the index or psymtabs. */
6774 static struct symtab
*
6775 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6777 return (dwarf2_per_objfile
->using_index
6778 ? per_cu
->v
.quick
->symtab
6779 : per_cu
->v
.psymtab
->symtab
);
6782 /* A helper function for computing the list of all symbol tables
6783 included by PER_CU. */
6786 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6787 htab_t all_children
,
6788 struct dwarf2_per_cu_data
*per_cu
)
6792 struct dwarf2_per_cu_data
*iter
;
6794 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6797 /* This inclusion and its children have been processed. */
6802 /* Only add a CU if it has a symbol table. */
6803 if (get_symtab (per_cu
) != NULL
)
6804 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6807 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6809 recursively_compute_inclusions (result
, all_children
, iter
);
6812 /* Compute the symtab 'includes' fields for the symtab related to
6816 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6818 gdb_assert (! per_cu
->is_debug_types
);
6820 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6823 struct dwarf2_per_cu_data
*iter
;
6824 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6825 htab_t all_children
;
6826 struct symtab
*symtab
= get_symtab (per_cu
);
6828 /* If we don't have a symtab, we can just skip this case. */
6832 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6833 NULL
, xcalloc
, xfree
);
6836 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6839 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6841 /* Now we have a transitive closure of all the included CUs, so
6842 we can convert it to a list of symtabs. */
6843 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6845 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6846 (len
+ 1) * sizeof (struct symtab
*));
6848 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6850 symtab
->includes
[ix
] = get_symtab (iter
);
6851 symtab
->includes
[len
] = NULL
;
6853 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6854 htab_delete (all_children
);
6858 /* Compute the 'includes' field for the symtabs of all the CUs we just
6862 process_cu_includes (void)
6865 struct dwarf2_per_cu_data
*iter
;
6868 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6872 if (! iter
->is_debug_types
)
6873 compute_symtab_includes (iter
);
6876 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6879 /* Generate full symbol information for PER_CU, whose DIEs have
6880 already been loaded into memory. */
6883 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6884 enum language pretend_language
)
6886 struct dwarf2_cu
*cu
= per_cu
->cu
;
6887 struct objfile
*objfile
= per_cu
->objfile
;
6888 CORE_ADDR lowpc
, highpc
;
6889 struct symtab
*symtab
;
6890 struct cleanup
*back_to
, *delayed_list_cleanup
;
6892 struct block
*static_block
;
6894 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6897 back_to
= make_cleanup (really_free_pendings
, NULL
);
6898 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6900 cu
->list_in_scope
= &file_symbols
;
6902 cu
->language
= pretend_language
;
6903 cu
->language_defn
= language_def (cu
->language
);
6905 /* Do line number decoding in read_file_scope () */
6906 process_die (cu
->dies
, cu
);
6908 /* For now fudge the Go package. */
6909 if (cu
->language
== language_go
)
6910 fixup_go_packaging (cu
);
6912 /* Now that we have processed all the DIEs in the CU, all the types
6913 should be complete, and it should now be safe to compute all of the
6915 compute_delayed_physnames (cu
);
6916 do_cleanups (delayed_list_cleanup
);
6918 /* Some compilers don't define a DW_AT_high_pc attribute for the
6919 compilation unit. If the DW_AT_high_pc is missing, synthesize
6920 it, by scanning the DIE's below the compilation unit. */
6921 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6924 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
6925 per_cu
->s
.imported_symtabs
!= NULL
);
6927 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
6928 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
6929 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
6930 addrmap to help ensure it has an accurate map of pc values belonging to
6932 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
6934 symtab
= end_symtab_from_static_block (static_block
, objfile
,
6935 SECT_OFF_TEXT (objfile
), 0);
6939 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
6941 /* Set symtab language to language from DW_AT_language. If the
6942 compilation is from a C file generated by language preprocessors, do
6943 not set the language if it was already deduced by start_subfile. */
6944 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6945 symtab
->language
= cu
->language
;
6947 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6948 produce DW_AT_location with location lists but it can be possibly
6949 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6950 there were bugs in prologue debug info, fixed later in GCC-4.5
6951 by "unwind info for epilogues" patch (which is not directly related).
6953 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6954 needed, it would be wrong due to missing DW_AT_producer there.
6956 Still one can confuse GDB by using non-standard GCC compilation
6957 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6959 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
6960 symtab
->locations_valid
= 1;
6962 if (gcc_4_minor
>= 5)
6963 symtab
->epilogue_unwind_valid
= 1;
6965 symtab
->call_site_htab
= cu
->call_site_htab
;
6968 if (dwarf2_per_objfile
->using_index
)
6969 per_cu
->v
.quick
->symtab
= symtab
;
6972 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6973 pst
->symtab
= symtab
;
6977 /* Push it for inclusion processing later. */
6978 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
6980 do_cleanups (back_to
);
6983 /* Generate full symbol information for type unit PER_CU, whose DIEs have
6984 already been loaded into memory. */
6987 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
6988 enum language pretend_language
)
6990 struct dwarf2_cu
*cu
= per_cu
->cu
;
6991 struct objfile
*objfile
= per_cu
->objfile
;
6992 struct symtab
*symtab
;
6993 struct cleanup
*back_to
, *delayed_list_cleanup
;
6996 back_to
= make_cleanup (really_free_pendings
, NULL
);
6997 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6999 cu
->list_in_scope
= &file_symbols
;
7001 cu
->language
= pretend_language
;
7002 cu
->language_defn
= language_def (cu
->language
);
7004 /* The symbol tables are set up in read_type_unit_scope. */
7005 process_die (cu
->dies
, cu
);
7007 /* For now fudge the Go package. */
7008 if (cu
->language
== language_go
)
7009 fixup_go_packaging (cu
);
7011 /* Now that we have processed all the DIEs in the CU, all the types
7012 should be complete, and it should now be safe to compute all of the
7014 compute_delayed_physnames (cu
);
7015 do_cleanups (delayed_list_cleanup
);
7017 /* TUs share symbol tables.
7018 If this is the first TU to use this symtab, complete the construction
7019 of it with end_expandable_symtab. Otherwise, complete the addition of
7020 this TU's symbols to the existing symtab. */
7021 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
7023 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7024 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
7028 /* Set symtab language to language from DW_AT_language. If the
7029 compilation is from a C file generated by language preprocessors,
7030 do not set the language if it was already deduced by
7032 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7033 symtab
->language
= cu
->language
;
7038 augment_type_symtab (objfile
,
7039 per_cu
->s
.type_unit_group
->primary_symtab
);
7040 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
7043 if (dwarf2_per_objfile
->using_index
)
7044 per_cu
->v
.quick
->symtab
= symtab
;
7047 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7048 pst
->symtab
= symtab
;
7052 do_cleanups (back_to
);
7055 /* Process an imported unit DIE. */
7058 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7060 struct attribute
*attr
;
7062 /* For now we don't handle imported units in type units. */
7063 if (cu
->per_cu
->is_debug_types
)
7065 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7066 " supported in type units [in module %s]"),
7070 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7073 struct dwarf2_per_cu_data
*per_cu
;
7074 struct symtab
*imported_symtab
;
7078 offset
= dwarf2_get_ref_die_offset (attr
);
7079 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7080 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7082 /* Queue the unit, if needed. */
7083 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7084 load_full_comp_unit (per_cu
, cu
->language
);
7086 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
7091 /* Process a die and its children. */
7094 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7098 case DW_TAG_padding
:
7100 case DW_TAG_compile_unit
:
7101 case DW_TAG_partial_unit
:
7102 read_file_scope (die
, cu
);
7104 case DW_TAG_type_unit
:
7105 read_type_unit_scope (die
, cu
);
7107 case DW_TAG_subprogram
:
7108 case DW_TAG_inlined_subroutine
:
7109 read_func_scope (die
, cu
);
7111 case DW_TAG_lexical_block
:
7112 case DW_TAG_try_block
:
7113 case DW_TAG_catch_block
:
7114 read_lexical_block_scope (die
, cu
);
7116 case DW_TAG_GNU_call_site
:
7117 read_call_site_scope (die
, cu
);
7119 case DW_TAG_class_type
:
7120 case DW_TAG_interface_type
:
7121 case DW_TAG_structure_type
:
7122 case DW_TAG_union_type
:
7123 process_structure_scope (die
, cu
);
7125 case DW_TAG_enumeration_type
:
7126 process_enumeration_scope (die
, cu
);
7129 /* These dies have a type, but processing them does not create
7130 a symbol or recurse to process the children. Therefore we can
7131 read them on-demand through read_type_die. */
7132 case DW_TAG_subroutine_type
:
7133 case DW_TAG_set_type
:
7134 case DW_TAG_array_type
:
7135 case DW_TAG_pointer_type
:
7136 case DW_TAG_ptr_to_member_type
:
7137 case DW_TAG_reference_type
:
7138 case DW_TAG_string_type
:
7141 case DW_TAG_base_type
:
7142 case DW_TAG_subrange_type
:
7143 case DW_TAG_typedef
:
7144 /* Add a typedef symbol for the type definition, if it has a
7146 new_symbol (die
, read_type_die (die
, cu
), cu
);
7148 case DW_TAG_common_block
:
7149 read_common_block (die
, cu
);
7151 case DW_TAG_common_inclusion
:
7153 case DW_TAG_namespace
:
7154 processing_has_namespace_info
= 1;
7155 read_namespace (die
, cu
);
7158 processing_has_namespace_info
= 1;
7159 read_module (die
, cu
);
7161 case DW_TAG_imported_declaration
:
7162 case DW_TAG_imported_module
:
7163 processing_has_namespace_info
= 1;
7164 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7165 || cu
->language
!= language_fortran
))
7166 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7167 dwarf_tag_name (die
->tag
));
7168 read_import_statement (die
, cu
);
7171 case DW_TAG_imported_unit
:
7172 process_imported_unit_die (die
, cu
);
7176 new_symbol (die
, NULL
, cu
);
7181 /* A helper function for dwarf2_compute_name which determines whether DIE
7182 needs to have the name of the scope prepended to the name listed in the
7186 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7188 struct attribute
*attr
;
7192 case DW_TAG_namespace
:
7193 case DW_TAG_typedef
:
7194 case DW_TAG_class_type
:
7195 case DW_TAG_interface_type
:
7196 case DW_TAG_structure_type
:
7197 case DW_TAG_union_type
:
7198 case DW_TAG_enumeration_type
:
7199 case DW_TAG_enumerator
:
7200 case DW_TAG_subprogram
:
7204 case DW_TAG_variable
:
7205 case DW_TAG_constant
:
7206 /* We only need to prefix "globally" visible variables. These include
7207 any variable marked with DW_AT_external or any variable that
7208 lives in a namespace. [Variables in anonymous namespaces
7209 require prefixing, but they are not DW_AT_external.] */
7211 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7213 struct dwarf2_cu
*spec_cu
= cu
;
7215 return die_needs_namespace (die_specification (die
, &spec_cu
),
7219 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7220 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7221 && die
->parent
->tag
!= DW_TAG_module
)
7223 /* A variable in a lexical block of some kind does not need a
7224 namespace, even though in C++ such variables may be external
7225 and have a mangled name. */
7226 if (die
->parent
->tag
== DW_TAG_lexical_block
7227 || die
->parent
->tag
== DW_TAG_try_block
7228 || die
->parent
->tag
== DW_TAG_catch_block
7229 || die
->parent
->tag
== DW_TAG_subprogram
)
7238 /* Retrieve the last character from a mem_file. */
7241 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7243 char *last_char_p
= (char *) object
;
7246 *last_char_p
= buffer
[length
- 1];
7249 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7250 compute the physname for the object, which include a method's:
7251 - formal parameters (C++/Java),
7252 - receiver type (Go),
7253 - return type (Java).
7255 The term "physname" is a bit confusing.
7256 For C++, for example, it is the demangled name.
7257 For Go, for example, it's the mangled name.
7259 For Ada, return the DIE's linkage name rather than the fully qualified
7260 name. PHYSNAME is ignored..
7262 The result is allocated on the objfile_obstack and canonicalized. */
7265 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
7268 struct objfile
*objfile
= cu
->objfile
;
7271 name
= dwarf2_name (die
, cu
);
7273 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7274 compute it by typename_concat inside GDB. */
7275 if (cu
->language
== language_ada
7276 || (cu
->language
== language_fortran
&& physname
))
7278 /* For Ada unit, we prefer the linkage name over the name, as
7279 the former contains the exported name, which the user expects
7280 to be able to reference. Ideally, we want the user to be able
7281 to reference this entity using either natural or linkage name,
7282 but we haven't started looking at this enhancement yet. */
7283 struct attribute
*attr
;
7285 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7287 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7288 if (attr
&& DW_STRING (attr
))
7289 return DW_STRING (attr
);
7292 /* These are the only languages we know how to qualify names in. */
7294 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7295 || cu
->language
== language_fortran
))
7297 if (die_needs_namespace (die
, cu
))
7301 struct ui_file
*buf
;
7303 prefix
= determine_prefix (die
, cu
);
7304 buf
= mem_fileopen ();
7305 if (*prefix
!= '\0')
7307 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7310 fputs_unfiltered (prefixed_name
, buf
);
7311 xfree (prefixed_name
);
7314 fputs_unfiltered (name
, buf
);
7316 /* Template parameters may be specified in the DIE's DW_AT_name, or
7317 as children with DW_TAG_template_type_param or
7318 DW_TAG_value_type_param. If the latter, add them to the name
7319 here. If the name already has template parameters, then
7320 skip this step; some versions of GCC emit both, and
7321 it is more efficient to use the pre-computed name.
7323 Something to keep in mind about this process: it is very
7324 unlikely, or in some cases downright impossible, to produce
7325 something that will match the mangled name of a function.
7326 If the definition of the function has the same debug info,
7327 we should be able to match up with it anyway. But fallbacks
7328 using the minimal symbol, for instance to find a method
7329 implemented in a stripped copy of libstdc++, will not work.
7330 If we do not have debug info for the definition, we will have to
7331 match them up some other way.
7333 When we do name matching there is a related problem with function
7334 templates; two instantiated function templates are allowed to
7335 differ only by their return types, which we do not add here. */
7337 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7339 struct attribute
*attr
;
7340 struct die_info
*child
;
7343 die
->building_fullname
= 1;
7345 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7350 struct dwarf2_locexpr_baton
*baton
;
7353 if (child
->tag
!= DW_TAG_template_type_param
7354 && child
->tag
!= DW_TAG_template_value_param
)
7359 fputs_unfiltered ("<", buf
);
7363 fputs_unfiltered (", ", buf
);
7365 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7368 complaint (&symfile_complaints
,
7369 _("template parameter missing DW_AT_type"));
7370 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7373 type
= die_type (child
, cu
);
7375 if (child
->tag
== DW_TAG_template_type_param
)
7377 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7381 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7384 complaint (&symfile_complaints
,
7385 _("template parameter missing "
7386 "DW_AT_const_value"));
7387 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7391 dwarf2_const_value_attr (attr
, type
, name
,
7392 &cu
->comp_unit_obstack
, cu
,
7393 &value
, &bytes
, &baton
);
7395 if (TYPE_NOSIGN (type
))
7396 /* GDB prints characters as NUMBER 'CHAR'. If that's
7397 changed, this can use value_print instead. */
7398 c_printchar (value
, type
, buf
);
7401 struct value_print_options opts
;
7404 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7408 else if (bytes
!= NULL
)
7410 v
= allocate_value (type
);
7411 memcpy (value_contents_writeable (v
), bytes
,
7412 TYPE_LENGTH (type
));
7415 v
= value_from_longest (type
, value
);
7417 /* Specify decimal so that we do not depend on
7419 get_formatted_print_options (&opts
, 'd');
7421 value_print (v
, buf
, &opts
);
7427 die
->building_fullname
= 0;
7431 /* Close the argument list, with a space if necessary
7432 (nested templates). */
7433 char last_char
= '\0';
7434 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7435 if (last_char
== '>')
7436 fputs_unfiltered (" >", buf
);
7438 fputs_unfiltered (">", buf
);
7442 /* For Java and C++ methods, append formal parameter type
7443 information, if PHYSNAME. */
7445 if (physname
&& die
->tag
== DW_TAG_subprogram
7446 && (cu
->language
== language_cplus
7447 || cu
->language
== language_java
))
7449 struct type
*type
= read_type_die (die
, cu
);
7451 c_type_print_args (type
, buf
, 1, cu
->language
,
7452 &type_print_raw_options
);
7454 if (cu
->language
== language_java
)
7456 /* For java, we must append the return type to method
7458 if (die
->tag
== DW_TAG_subprogram
)
7459 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7460 0, 0, &type_print_raw_options
);
7462 else if (cu
->language
== language_cplus
)
7464 /* Assume that an artificial first parameter is
7465 "this", but do not crash if it is not. RealView
7466 marks unnamed (and thus unused) parameters as
7467 artificial; there is no way to differentiate
7469 if (TYPE_NFIELDS (type
) > 0
7470 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7471 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7472 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7474 fputs_unfiltered (" const", buf
);
7478 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7480 ui_file_delete (buf
);
7482 if (cu
->language
== language_cplus
)
7485 = dwarf2_canonicalize_name (name
, cu
,
7486 &objfile
->objfile_obstack
);
7497 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7498 If scope qualifiers are appropriate they will be added. The result
7499 will be allocated on the objfile_obstack, or NULL if the DIE does
7500 not have a name. NAME may either be from a previous call to
7501 dwarf2_name or NULL.
7503 The output string will be canonicalized (if C++/Java). */
7506 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7508 return dwarf2_compute_name (name
, die
, cu
, 0);
7511 /* Construct a physname for the given DIE in CU. NAME may either be
7512 from a previous call to dwarf2_name or NULL. The result will be
7513 allocated on the objfile_objstack or NULL if the DIE does not have a
7516 The output string will be canonicalized (if C++/Java). */
7519 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7521 struct objfile
*objfile
= cu
->objfile
;
7522 struct attribute
*attr
;
7523 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7524 struct cleanup
*back_to
;
7527 /* In this case dwarf2_compute_name is just a shortcut not building anything
7529 if (!die_needs_namespace (die
, cu
))
7530 return dwarf2_compute_name (name
, die
, cu
, 1);
7532 back_to
= make_cleanup (null_cleanup
, NULL
);
7534 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7536 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7538 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7540 if (attr
&& DW_STRING (attr
))
7544 mangled
= DW_STRING (attr
);
7546 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7547 type. It is easier for GDB users to search for such functions as
7548 `name(params)' than `long name(params)'. In such case the minimal
7549 symbol names do not match the full symbol names but for template
7550 functions there is never a need to look up their definition from their
7551 declaration so the only disadvantage remains the minimal symbol
7552 variant `long name(params)' does not have the proper inferior type.
7555 if (cu
->language
== language_go
)
7557 /* This is a lie, but we already lie to the caller new_symbol_full.
7558 new_symbol_full assumes we return the mangled name.
7559 This just undoes that lie until things are cleaned up. */
7564 demangled
= cplus_demangle (mangled
,
7565 (DMGL_PARAMS
| DMGL_ANSI
7566 | (cu
->language
== language_java
7567 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7572 make_cleanup (xfree
, demangled
);
7582 if (canon
== NULL
|| check_physname
)
7584 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7586 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7588 /* It may not mean a bug in GDB. The compiler could also
7589 compute DW_AT_linkage_name incorrectly. But in such case
7590 GDB would need to be bug-to-bug compatible. */
7592 complaint (&symfile_complaints
,
7593 _("Computed physname <%s> does not match demangled <%s> "
7594 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7595 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7597 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7598 is available here - over computed PHYSNAME. It is safer
7599 against both buggy GDB and buggy compilers. */
7613 retval
= obsavestring (retval
, strlen (retval
),
7614 &objfile
->objfile_obstack
);
7616 do_cleanups (back_to
);
7620 /* Read the import statement specified by the given die and record it. */
7623 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7625 struct objfile
*objfile
= cu
->objfile
;
7626 struct attribute
*import_attr
;
7627 struct die_info
*imported_die
, *child_die
;
7628 struct dwarf2_cu
*imported_cu
;
7629 const char *imported_name
;
7630 const char *imported_name_prefix
;
7631 const char *canonical_name
;
7632 const char *import_alias
;
7633 const char *imported_declaration
= NULL
;
7634 const char *import_prefix
;
7635 VEC (const_char_ptr
) *excludes
= NULL
;
7636 struct cleanup
*cleanups
;
7640 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7641 if (import_attr
== NULL
)
7643 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7644 dwarf_tag_name (die
->tag
));
7649 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7650 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7651 if (imported_name
== NULL
)
7653 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7655 The import in the following code:
7669 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7670 <52> DW_AT_decl_file : 1
7671 <53> DW_AT_decl_line : 6
7672 <54> DW_AT_import : <0x75>
7673 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7675 <5b> DW_AT_decl_file : 1
7676 <5c> DW_AT_decl_line : 2
7677 <5d> DW_AT_type : <0x6e>
7679 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7680 <76> DW_AT_byte_size : 4
7681 <77> DW_AT_encoding : 5 (signed)
7683 imports the wrong die ( 0x75 instead of 0x58 ).
7684 This case will be ignored until the gcc bug is fixed. */
7688 /* Figure out the local name after import. */
7689 import_alias
= dwarf2_name (die
, cu
);
7691 /* Figure out where the statement is being imported to. */
7692 import_prefix
= determine_prefix (die
, cu
);
7694 /* Figure out what the scope of the imported die is and prepend it
7695 to the name of the imported die. */
7696 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7698 if (imported_die
->tag
!= DW_TAG_namespace
7699 && imported_die
->tag
!= DW_TAG_module
)
7701 imported_declaration
= imported_name
;
7702 canonical_name
= imported_name_prefix
;
7704 else if (strlen (imported_name_prefix
) > 0)
7706 temp
= alloca (strlen (imported_name_prefix
)
7707 + 2 + strlen (imported_name
) + 1);
7708 strcpy (temp
, imported_name_prefix
);
7709 strcat (temp
, "::");
7710 strcat (temp
, imported_name
);
7711 canonical_name
= temp
;
7714 canonical_name
= imported_name
;
7716 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7718 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7719 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7720 child_die
= sibling_die (child_die
))
7722 /* DWARF-4: A Fortran use statement with a “rename list” may be
7723 represented by an imported module entry with an import attribute
7724 referring to the module and owned entries corresponding to those
7725 entities that are renamed as part of being imported. */
7727 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7729 complaint (&symfile_complaints
,
7730 _("child DW_TAG_imported_declaration expected "
7731 "- DIE at 0x%x [in module %s]"),
7732 child_die
->offset
.sect_off
, objfile
->name
);
7736 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7737 if (import_attr
== NULL
)
7739 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7740 dwarf_tag_name (child_die
->tag
));
7745 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7747 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7748 if (imported_name
== NULL
)
7750 complaint (&symfile_complaints
,
7751 _("child DW_TAG_imported_declaration has unknown "
7752 "imported name - DIE at 0x%x [in module %s]"),
7753 child_die
->offset
.sect_off
, objfile
->name
);
7757 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7759 process_die (child_die
, cu
);
7762 cp_add_using_directive (import_prefix
,
7765 imported_declaration
,
7767 &objfile
->objfile_obstack
);
7769 do_cleanups (cleanups
);
7772 /* Cleanup function for handle_DW_AT_stmt_list. */
7775 free_cu_line_header (void *arg
)
7777 struct dwarf2_cu
*cu
= arg
;
7779 free_line_header (cu
->line_header
);
7780 cu
->line_header
= NULL
;
7783 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7784 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7785 this, it was first present in GCC release 4.3.0. */
7788 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
7790 if (!cu
->checked_producer
)
7791 check_producer (cu
);
7793 return cu
->producer_is_gcc_lt_4_3
;
7797 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7798 char **name
, char **comp_dir
)
7800 struct attribute
*attr
;
7805 /* Find the filename. Do not use dwarf2_name here, since the filename
7806 is not a source language identifier. */
7807 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7810 *name
= DW_STRING (attr
);
7813 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7815 *comp_dir
= DW_STRING (attr
);
7816 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
7817 && IS_ABSOLUTE_PATH (*name
))
7819 *comp_dir
= ldirname (*name
);
7820 if (*comp_dir
!= NULL
)
7821 make_cleanup (xfree
, *comp_dir
);
7823 if (*comp_dir
!= NULL
)
7825 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7826 directory, get rid of it. */
7827 char *cp
= strchr (*comp_dir
, ':');
7829 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7834 *name
= "<unknown>";
7837 /* Handle DW_AT_stmt_list for a compilation unit.
7838 DIE is the DW_TAG_compile_unit die for CU.
7839 COMP_DIR is the compilation directory.
7840 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7843 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7844 const char *comp_dir
)
7846 struct attribute
*attr
;
7848 gdb_assert (! cu
->per_cu
->is_debug_types
);
7850 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7853 unsigned int line_offset
= DW_UNSND (attr
);
7854 struct line_header
*line_header
7855 = dwarf_decode_line_header (line_offset
, cu
);
7859 cu
->line_header
= line_header
;
7860 make_cleanup (free_cu_line_header
, cu
);
7861 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7866 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7869 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7871 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7872 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7873 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7874 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7875 struct attribute
*attr
;
7877 char *comp_dir
= NULL
;
7878 struct die_info
*child_die
;
7879 bfd
*abfd
= objfile
->obfd
;
7882 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7884 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7886 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7887 from finish_block. */
7888 if (lowpc
== ((CORE_ADDR
) -1))
7893 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7895 prepare_one_comp_unit (cu
, die
, cu
->language
);
7897 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7898 standardised yet. As a workaround for the language detection we fall
7899 back to the DW_AT_producer string. */
7900 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7901 cu
->language
= language_opencl
;
7903 /* Similar hack for Go. */
7904 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7905 set_cu_language (DW_LANG_Go
, cu
);
7907 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7909 /* Decode line number information if present. We do this before
7910 processing child DIEs, so that the line header table is available
7911 for DW_AT_decl_file. */
7912 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7914 /* Process all dies in compilation unit. */
7915 if (die
->child
!= NULL
)
7917 child_die
= die
->child
;
7918 while (child_die
&& child_die
->tag
)
7920 process_die (child_die
, cu
);
7921 child_die
= sibling_die (child_die
);
7925 /* Decode macro information, if present. Dwarf 2 macro information
7926 refers to information in the line number info statement program
7927 header, so we can only read it if we've read the header
7929 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7930 if (attr
&& cu
->line_header
)
7932 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7933 complaint (&symfile_complaints
,
7934 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7936 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
7940 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
7941 if (attr
&& cu
->line_header
)
7943 unsigned int macro_offset
= DW_UNSND (attr
);
7945 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
7949 do_cleanups (back_to
);
7952 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
7953 Create the set of symtabs used by this TU, or if this TU is sharing
7954 symtabs with another TU and the symtabs have already been created
7955 then restore those symtabs in the line header.
7956 We don't need the pc/line-number mapping for type units. */
7959 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
7961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7962 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7963 struct type_unit_group
*tu_group
;
7965 struct line_header
*lh
;
7966 struct attribute
*attr
;
7967 unsigned int i
, line_offset
;
7969 gdb_assert (per_cu
->is_debug_types
);
7971 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7973 /* If we're using .gdb_index (includes -readnow) then
7974 per_cu->s.type_unit_group may not have been set up yet. */
7975 if (per_cu
->s
.type_unit_group
== NULL
)
7976 per_cu
->s
.type_unit_group
= get_type_unit_group (cu
, attr
);
7977 tu_group
= per_cu
->s
.type_unit_group
;
7979 /* If we've already processed this stmt_list there's no real need to
7980 do it again, we could fake it and just recreate the part we need
7981 (file name,index -> symtab mapping). If data shows this optimization
7982 is useful we can do it then. */
7983 first_time
= tu_group
->primary_symtab
== NULL
;
7985 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
7990 line_offset
= DW_UNSND (attr
);
7991 lh
= dwarf_decode_line_header (line_offset
, cu
);
7996 dwarf2_start_symtab (cu
, "", NULL
, 0);
7999 gdb_assert (tu_group
->symtabs
== NULL
);
8002 /* Note: The primary symtab will get allocated at the end. */
8006 cu
->line_header
= lh
;
8007 make_cleanup (free_cu_line_header
, cu
);
8011 dwarf2_start_symtab (cu
, "", NULL
, 0);
8013 tu_group
->num_symtabs
= lh
->num_file_names
;
8014 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8016 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8019 struct file_entry
*fe
= &lh
->file_names
[i
];
8022 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8023 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8025 /* Note: We don't have to watch for the main subfile here, type units
8026 don't have DW_AT_name. */
8028 if (current_subfile
->symtab
== NULL
)
8030 /* NOTE: start_subfile will recognize when it's been passed
8031 a file it has already seen. So we can't assume there's a
8032 simple mapping from lh->file_names to subfiles,
8033 lh->file_names may contain dups. */
8034 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8038 fe
->symtab
= current_subfile
->symtab
;
8039 tu_group
->symtabs
[i
] = fe
->symtab
;
8046 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8048 struct file_entry
*fe
= &lh
->file_names
[i
];
8050 fe
->symtab
= tu_group
->symtabs
[i
];
8054 /* The main symtab is allocated last. Type units don't have DW_AT_name
8055 so they don't have a "real" (so to speak) symtab anyway.
8056 There is later code that will assign the main symtab to all symbols
8057 that don't have one. We need to handle the case of a symbol with a
8058 missing symtab (DW_AT_decl_file) anyway. */
8061 /* Process DW_TAG_type_unit.
8062 For TUs we want to skip the first top level sibling if it's not the
8063 actual type being defined by this TU. In this case the first top
8064 level sibling is there to provide context only. */
8067 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8069 struct die_info
*child_die
;
8071 prepare_one_comp_unit (cu
, die
, language_minimal
);
8073 /* Initialize (or reinitialize) the machinery for building symtabs.
8074 We do this before processing child DIEs, so that the line header table
8075 is available for DW_AT_decl_file. */
8076 setup_type_unit_groups (die
, cu
);
8078 if (die
->child
!= NULL
)
8080 child_die
= die
->child
;
8081 while (child_die
&& child_die
->tag
)
8083 process_die (child_die
, cu
);
8084 child_die
= sibling_die (child_die
);
8091 http://gcc.gnu.org/wiki/DebugFission
8092 http://gcc.gnu.org/wiki/DebugFissionDWP
8094 To simplify handling of both DWO files ("object" files with the DWARF info)
8095 and DWP files (a file with the DWOs packaged up into one file), we treat
8096 DWP files as having a collection of virtual DWO files. */
8099 hash_dwo_file (const void *item
)
8101 const struct dwo_file
*dwo_file
= item
;
8103 return htab_hash_string (dwo_file
->name
);
8107 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8109 const struct dwo_file
*lhs
= item_lhs
;
8110 const struct dwo_file
*rhs
= item_rhs
;
8112 return strcmp (lhs
->name
, rhs
->name
) == 0;
8115 /* Allocate a hash table for DWO files. */
8118 allocate_dwo_file_hash_table (void)
8120 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8122 return htab_create_alloc_ex (41,
8126 &objfile
->objfile_obstack
,
8127 hashtab_obstack_allocate
,
8128 dummy_obstack_deallocate
);
8131 /* Lookup DWO file DWO_NAME. */
8134 lookup_dwo_file_slot (const char *dwo_name
)
8136 struct dwo_file find_entry
;
8139 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8140 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8142 memset (&find_entry
, 0, sizeof (find_entry
));
8143 find_entry
.name
= dwo_name
;
8144 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8150 hash_dwo_unit (const void *item
)
8152 const struct dwo_unit
*dwo_unit
= item
;
8154 /* This drops the top 32 bits of the id, but is ok for a hash. */
8155 return dwo_unit
->signature
;
8159 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8161 const struct dwo_unit
*lhs
= item_lhs
;
8162 const struct dwo_unit
*rhs
= item_rhs
;
8164 /* The signature is assumed to be unique within the DWO file.
8165 So while object file CU dwo_id's always have the value zero,
8166 that's OK, assuming each object file DWO file has only one CU,
8167 and that's the rule for now. */
8168 return lhs
->signature
== rhs
->signature
;
8171 /* Allocate a hash table for DWO CUs,TUs.
8172 There is one of these tables for each of CUs,TUs for each DWO file. */
8175 allocate_dwo_unit_table (struct objfile
*objfile
)
8177 /* Start out with a pretty small number.
8178 Generally DWO files contain only one CU and maybe some TUs. */
8179 return htab_create_alloc_ex (3,
8183 &objfile
->objfile_obstack
,
8184 hashtab_obstack_allocate
,
8185 dummy_obstack_deallocate
);
8188 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8190 struct create_dwo_info_table_data
8192 struct dwo_file
*dwo_file
;
8196 /* die_reader_func for create_dwo_debug_info_hash_table. */
8199 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8201 struct die_info
*comp_unit_die
,
8205 struct dwarf2_cu
*cu
= reader
->cu
;
8206 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8207 sect_offset offset
= cu
->per_cu
->offset
;
8208 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8209 struct create_dwo_info_table_data
*data
= datap
;
8210 struct dwo_file
*dwo_file
= data
->dwo_file
;
8211 htab_t cu_htab
= data
->cu_htab
;
8213 struct attribute
*attr
;
8214 struct dwo_unit
*dwo_unit
;
8216 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8219 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8220 " its dwo_id [in module %s]"),
8221 offset
.sect_off
, dwo_file
->name
);
8225 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8226 dwo_unit
->dwo_file
= dwo_file
;
8227 dwo_unit
->signature
= DW_UNSND (attr
);
8228 dwo_unit
->info_or_types_section
= section
;
8229 dwo_unit
->offset
= offset
;
8230 dwo_unit
->length
= cu
->per_cu
->length
;
8232 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8233 gdb_assert (slot
!= NULL
);
8236 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8238 complaint (&symfile_complaints
,
8239 _("debug entry at offset 0x%x is duplicate to the entry at"
8240 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8241 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8242 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8248 if (dwarf2_read_debug
)
8249 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8251 phex (dwo_unit
->signature
,
8252 sizeof (dwo_unit
->signature
)));
8255 /* Create a hash table to map DWO IDs to their CU entry in
8256 .debug_info.dwo in DWO_FILE.
8257 Note: This function processes DWO files only, not DWP files. */
8260 create_dwo_debug_info_hash_table (struct dwo_file
*dwo_file
)
8262 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8263 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8266 gdb_byte
*info_ptr
, *end_ptr
;
8267 struct create_dwo_info_table_data create_dwo_info_table_data
;
8269 dwarf2_read_section (objfile
, section
);
8270 info_ptr
= section
->buffer
;
8272 if (info_ptr
== NULL
)
8275 /* We can't set abfd until now because the section may be empty or
8276 not present, in which case section->asection will be NULL. */
8277 abfd
= section
->asection
->owner
;
8279 if (dwarf2_read_debug
)
8280 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8281 bfd_get_filename (abfd
));
8283 cu_htab
= allocate_dwo_unit_table (objfile
);
8285 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8286 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8288 end_ptr
= info_ptr
+ section
->size
;
8289 while (info_ptr
< end_ptr
)
8291 struct dwarf2_per_cu_data per_cu
;
8293 memset (&per_cu
, 0, sizeof (per_cu
));
8294 per_cu
.objfile
= objfile
;
8295 per_cu
.is_debug_types
= 0;
8296 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8297 per_cu
.info_or_types_section
= section
;
8299 init_cutu_and_read_dies_no_follow (&per_cu
,
8300 &dwo_file
->sections
.abbrev
,
8302 create_dwo_debug_info_hash_table_reader
,
8303 &create_dwo_info_table_data
);
8305 info_ptr
+= per_cu
.length
;
8311 /* DWP file .debug_{cu,tu}_index section format:
8312 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8314 Both index sections have the same format, and serve to map a 64-bit
8315 signature to a set of section numbers. Each section begins with a header,
8316 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8317 indexes, and a pool of 32-bit section numbers. The index sections will be
8318 aligned at 8-byte boundaries in the file.
8320 The index section header contains two unsigned 32-bit values (using the
8321 byte order of the application binary):
8323 N, the number of compilation units or type units in the index
8324 M, the number of slots in the hash table
8326 (We assume that N and M will not exceed 2^32 - 1.)
8328 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8330 The hash table begins at offset 8 in the section, and consists of an array
8331 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8332 order of the application binary). Unused slots in the hash table are 0.
8333 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8335 The parallel table begins immediately after the hash table
8336 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8337 array of 32-bit indexes (using the byte order of the application binary),
8338 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8339 table contains a 32-bit index into the pool of section numbers. For unused
8340 hash table slots, the corresponding entry in the parallel table will be 0.
8342 Given a 64-bit compilation unit signature or a type signature S, an entry
8343 in the hash table is located as follows:
8345 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8346 the low-order k bits all set to 1.
8348 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8350 3) If the hash table entry at index H matches the signature, use that
8351 entry. If the hash table entry at index H is unused (all zeroes),
8352 terminate the search: the signature is not present in the table.
8354 4) Let H = (H + H') modulo M. Repeat at Step 3.
8356 Because M > N and H' and M are relatively prime, the search is guaranteed
8357 to stop at an unused slot or find the match.
8359 The pool of section numbers begins immediately following the hash table
8360 (at offset 8 + 12 * M from the beginning of the section). The pool of
8361 section numbers consists of an array of 32-bit words (using the byte order
8362 of the application binary). Each item in the array is indexed starting
8363 from 0. The hash table entry provides the index of the first section
8364 number in the set. Additional section numbers in the set follow, and the
8365 set is terminated by a 0 entry (section number 0 is not used in ELF).
8367 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8368 section must be the first entry in the set, and the .debug_abbrev.dwo must
8369 be the second entry. Other members of the set may follow in any order. */
8371 /* Create a hash table to map DWO IDs to their CU/TU entry in
8372 .debug_{info,types}.dwo in DWP_FILE.
8373 Returns NULL if there isn't one.
8374 Note: This function processes DWP files only, not DWO files. */
8376 static struct dwp_hash_table
*
8377 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8379 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8380 bfd
*dbfd
= dwp_file
->dbfd
;
8381 char *index_ptr
, *index_end
;
8382 struct dwarf2_section_info
*index
;
8383 uint32_t version
, nr_units
, nr_slots
;
8384 struct dwp_hash_table
*htab
;
8387 index
= &dwp_file
->sections
.tu_index
;
8389 index
= &dwp_file
->sections
.cu_index
;
8391 if (dwarf2_section_empty_p (index
))
8393 dwarf2_read_section (objfile
, index
);
8395 index_ptr
= index
->buffer
;
8396 index_end
= index_ptr
+ index
->size
;
8398 version
= read_4_bytes (dbfd
, index_ptr
);
8399 index_ptr
+= 8; /* Skip the unused word. */
8400 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8402 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8407 error (_("Dwarf Error: unsupported DWP file version (%u)"
8409 version
, dwp_file
->name
);
8411 if (nr_slots
!= (nr_slots
& -nr_slots
))
8413 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8414 " is not power of 2 [in module %s]"),
8415 nr_slots
, dwp_file
->name
);
8418 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8419 htab
->nr_units
= nr_units
;
8420 htab
->nr_slots
= nr_slots
;
8421 htab
->hash_table
= index_ptr
;
8422 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8423 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8428 /* Update SECTIONS with the data from SECTP.
8430 This function is like the other "locate" section routines that are
8431 passed to bfd_map_over_sections, but in this context the sections to
8432 read comes from the DWP hash table, not the full ELF section table.
8434 The result is non-zero for success, or zero if an error was found. */
8437 locate_virtual_dwo_sections (asection
*sectp
,
8438 struct virtual_dwo_sections
*sections
)
8440 const struct dwop_section_names
*names
= &dwop_section_names
;
8442 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8444 /* There can be only one. */
8445 if (sections
->abbrev
.asection
!= NULL
)
8447 sections
->abbrev
.asection
= sectp
;
8448 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8450 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8451 || section_is_p (sectp
->name
, &names
->types_dwo
))
8453 /* There can be only one. */
8454 if (sections
->info_or_types
.asection
!= NULL
)
8456 sections
->info_or_types
.asection
= sectp
;
8457 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8459 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8461 /* There can be only one. */
8462 if (sections
->line
.asection
!= NULL
)
8464 sections
->line
.asection
= sectp
;
8465 sections
->line
.size
= bfd_get_section_size (sectp
);
8467 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8469 /* There can be only one. */
8470 if (sections
->loc
.asection
!= NULL
)
8472 sections
->loc
.asection
= sectp
;
8473 sections
->loc
.size
= bfd_get_section_size (sectp
);
8475 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8477 /* There can be only one. */
8478 if (sections
->macinfo
.asection
!= NULL
)
8480 sections
->macinfo
.asection
= sectp
;
8481 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8483 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8485 /* There can be only one. */
8486 if (sections
->macro
.asection
!= NULL
)
8488 sections
->macro
.asection
= sectp
;
8489 sections
->macro
.size
= bfd_get_section_size (sectp
);
8491 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8493 /* There can be only one. */
8494 if (sections
->str_offsets
.asection
!= NULL
)
8496 sections
->str_offsets
.asection
= sectp
;
8497 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8501 /* No other kind of section is valid. */
8508 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8509 HTAB is the hash table from the DWP file.
8510 SECTION_INDEX is the index of the DWO in HTAB. */
8512 static struct dwo_unit
*
8513 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8514 const struct dwp_hash_table
*htab
,
8515 uint32_t section_index
,
8516 ULONGEST signature
, int is_debug_types
)
8518 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8519 bfd
*dbfd
= dwp_file
->dbfd
;
8520 const char *kind
= is_debug_types
? "TU" : "CU";
8521 struct dwo_file
*dwo_file
;
8522 struct dwo_unit
*dwo_unit
;
8523 struct virtual_dwo_sections sections
;
8524 void **dwo_file_slot
;
8525 char *virtual_dwo_name
;
8526 struct dwarf2_section_info
*cutu
;
8527 struct cleanup
*cleanups
;
8530 if (dwarf2_read_debug
)
8532 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/0x%s in DWP file: %s\n",
8534 section_index
, phex (signature
, sizeof (signature
)),
8538 /* Fetch the sections of this DWO.
8539 Put a limit on the number of sections we look for so that bad data
8540 doesn't cause us to loop forever. */
8542 #define MAX_NR_DWO_SECTIONS \
8543 (1 /* .debug_info or .debug_types */ \
8544 + 1 /* .debug_abbrev */ \
8545 + 1 /* .debug_line */ \
8546 + 1 /* .debug_loc */ \
8547 + 1 /* .debug_str_offsets */ \
8548 + 1 /* .debug_macro */ \
8549 + 1 /* .debug_macinfo */ \
8550 + 1 /* trailing zero */)
8552 memset (§ions
, 0, sizeof (sections
));
8553 cleanups
= make_cleanup (null_cleanup
, 0);
8555 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8558 uint32_t section_nr
=
8561 + (section_index
+ i
) * sizeof (uint32_t));
8563 if (section_nr
== 0)
8565 if (section_nr
>= dwp_file
->num_sections
)
8567 error (_("Dwarf Error: bad DWP hash table, section number too large"
8572 sectp
= dwp_file
->elf_sections
[section_nr
];
8573 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8575 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8582 || sections
.info_or_types
.asection
== NULL
8583 || sections
.abbrev
.asection
== NULL
)
8585 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8589 if (i
== MAX_NR_DWO_SECTIONS
)
8591 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8596 /* It's easier for the rest of the code if we fake a struct dwo_file and
8597 have dwo_unit "live" in that. At least for now.
8599 The DWP file can be made up of a random collection of CUs and TUs.
8600 However, for each CU + set of TUs that came from the same original DWO
8601 file, we want to combine them back into a virtual DWO file to save space
8602 (fewer struct dwo_file objects to allocated). Remember that for really
8603 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8606 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8607 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8608 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8609 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8610 (sections
.str_offsets
.asection
8611 ? sections
.str_offsets
.asection
->id
8613 make_cleanup (xfree
, virtual_dwo_name
);
8614 /* Can we use an existing virtual DWO file? */
8615 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
);
8616 /* Create one if necessary. */
8617 if (*dwo_file_slot
== NULL
)
8619 if (dwarf2_read_debug
)
8621 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8624 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8625 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8627 strlen (virtual_dwo_name
));
8628 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8629 dwo_file
->sections
.line
= sections
.line
;
8630 dwo_file
->sections
.loc
= sections
.loc
;
8631 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8632 dwo_file
->sections
.macro
= sections
.macro
;
8633 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8634 /* The "str" section is global to the entire DWP file. */
8635 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8636 /* The info or types section is assigned later to dwo_unit,
8637 there's no need to record it in dwo_file.
8638 Also, we can't simply record type sections in dwo_file because
8639 we record a pointer into the vector in dwo_unit. As we collect more
8640 types we'll grow the vector and eventually have to reallocate space
8641 for it, invalidating all the pointers into the current copy. */
8642 *dwo_file_slot
= dwo_file
;
8646 if (dwarf2_read_debug
)
8648 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8651 dwo_file
= *dwo_file_slot
;
8653 do_cleanups (cleanups
);
8655 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8656 dwo_unit
->dwo_file
= dwo_file
;
8657 dwo_unit
->signature
= signature
;
8658 dwo_unit
->info_or_types_section
=
8659 obstack_alloc (&objfile
->objfile_obstack
,
8660 sizeof (struct dwarf2_section_info
));
8661 *dwo_unit
->info_or_types_section
= sections
.info_or_types
;
8662 /* offset, length, type_offset_in_tu are set later. */
8667 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8669 static struct dwo_unit
*
8670 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8671 const struct dwp_hash_table
*htab
,
8672 ULONGEST signature
, int is_debug_types
)
8674 bfd
*dbfd
= dwp_file
->dbfd
;
8675 uint32_t mask
= htab
->nr_slots
- 1;
8676 uint32_t hash
= signature
& mask
;
8677 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8680 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8682 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8683 find_dwo_cu
.signature
= signature
;
8684 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8689 /* Use a for loop so that we don't loop forever on bad debug info. */
8690 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8692 ULONGEST signature_in_table
;
8694 signature_in_table
=
8695 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8696 if (signature_in_table
== signature
)
8698 uint32_t section_index
=
8699 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8701 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8702 signature
, is_debug_types
);
8705 if (signature_in_table
== 0)
8707 hash
= (hash
+ hash2
) & mask
;
8710 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8715 /* Subroutine of open_dwop_file to simplify it.
8716 Open the file specified by FILE_NAME and hand it off to BFD for
8717 preliminary analysis. Return a newly initialized bfd *, which
8718 includes a canonicalized copy of FILE_NAME.
8719 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8720 In case of trouble, return NULL.
8721 NOTE: This function is derived from symfile_bfd_open. */
8724 try_open_dwop_file (const char *file_name
, int is_dwp
)
8728 char *absolute_name
;
8730 flags
= OPF_TRY_CWD_FIRST
;
8732 flags
|= OPF_SEARCH_IN_PATH
;
8733 desc
= openp (debug_file_directory
, flags
, file_name
,
8734 O_RDONLY
| O_BINARY
, &absolute_name
);
8738 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8741 xfree (absolute_name
);
8744 xfree (absolute_name
);
8745 bfd_set_cacheable (sym_bfd
, 1);
8747 if (!bfd_check_format (sym_bfd
, bfd_object
))
8749 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8756 /* Try to open DWO/DWP file FILE_NAME.
8757 COMP_DIR is the DW_AT_comp_dir attribute.
8758 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8759 The result is the bfd handle of the file.
8760 If there is a problem finding or opening the file, return NULL.
8761 Upon success, the canonicalized path of the file is stored in the bfd,
8762 same as symfile_bfd_open. */
8765 open_dwop_file (const char *file_name
, const char *comp_dir
, int is_dwp
)
8769 if (IS_ABSOLUTE_PATH (file_name
))
8770 return try_open_dwop_file (file_name
, is_dwp
);
8772 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8774 if (comp_dir
!= NULL
)
8776 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8778 /* NOTE: If comp_dir is a relative path, this will also try the
8779 search path, which seems useful. */
8780 abfd
= try_open_dwop_file (path_to_try
, is_dwp
);
8781 xfree (path_to_try
);
8786 /* That didn't work, try debug-file-directory, which, despite its name,
8787 is a list of paths. */
8789 if (*debug_file_directory
== '\0')
8792 return try_open_dwop_file (file_name
, is_dwp
);
8795 /* This function is mapped across the sections and remembers the offset and
8796 size of each of the DWO debugging sections we are interested in. */
8799 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
8801 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
8802 const struct dwop_section_names
*names
= &dwop_section_names
;
8804 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8806 dwo_sections
->abbrev
.asection
= sectp
;
8807 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8809 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8811 dwo_sections
->info
.asection
= sectp
;
8812 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
8814 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8816 dwo_sections
->line
.asection
= sectp
;
8817 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
8819 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8821 dwo_sections
->loc
.asection
= sectp
;
8822 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
8824 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8826 dwo_sections
->macinfo
.asection
= sectp
;
8827 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8829 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8831 dwo_sections
->macro
.asection
= sectp
;
8832 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
8834 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8836 dwo_sections
->str
.asection
= sectp
;
8837 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
8839 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8841 dwo_sections
->str_offsets
.asection
= sectp
;
8842 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8844 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8846 struct dwarf2_section_info type_section
;
8848 memset (&type_section
, 0, sizeof (type_section
));
8849 type_section
.asection
= sectp
;
8850 type_section
.size
= bfd_get_section_size (sectp
);
8851 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
8856 /* Initialize the use of the DWO file specified by DWO_NAME.
8857 The result is NULL if DWO_NAME can't be found. */
8859 static struct dwo_file
*
8860 open_and_init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8862 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8863 struct dwo_file
*dwo_file
;
8865 struct cleanup
*cleanups
;
8867 dbfd
= open_dwop_file (dwo_name
, comp_dir
, 0);
8870 if (dwarf2_read_debug
)
8871 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
8874 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8875 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8876 dwo_name
, strlen (dwo_name
));
8877 dwo_file
->dbfd
= dbfd
;
8879 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8881 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
8883 dwo_file
->cus
= create_dwo_debug_info_hash_table (dwo_file
);
8885 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8886 dwo_file
->sections
.types
);
8888 discard_cleanups (cleanups
);
8890 if (dwarf2_read_debug
)
8891 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
8896 /* This function is mapped across the sections and remembers the offset and
8897 size of each of the DWP debugging sections we are interested in. */
8900 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
8902 struct dwp_file
*dwp_file
= dwp_file_ptr
;
8903 const struct dwop_section_names
*names
= &dwop_section_names
;
8904 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
8906 /* Record the ELF section number for later lookup: this is what the
8907 .debug_cu_index,.debug_tu_index tables use. */
8908 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
8909 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
8911 /* Look for specific sections that we need. */
8912 if (section_is_p (sectp
->name
, &names
->str_dwo
))
8914 dwp_file
->sections
.str
.asection
= sectp
;
8915 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8917 else if (section_is_p (sectp
->name
, &names
->cu_index
))
8919 dwp_file
->sections
.cu_index
.asection
= sectp
;
8920 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
8922 else if (section_is_p (sectp
->name
, &names
->tu_index
))
8924 dwp_file
->sections
.tu_index
.asection
= sectp
;
8925 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
8929 /* Hash function for dwp_file loaded CUs/TUs. */
8932 hash_dwp_loaded_cutus (const void *item
)
8934 const struct dwo_unit
*dwo_unit
= item
;
8936 /* This drops the top 32 bits of the signature, but is ok for a hash. */
8937 return dwo_unit
->signature
;
8940 /* Equality function for dwp_file loaded CUs/TUs. */
8943 eq_dwp_loaded_cutus (const void *a
, const void *b
)
8945 const struct dwo_unit
*dua
= a
;
8946 const struct dwo_unit
*dub
= b
;
8948 return dua
->signature
== dub
->signature
;
8951 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
8954 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
8956 return htab_create_alloc_ex (3,
8957 hash_dwp_loaded_cutus
,
8958 eq_dwp_loaded_cutus
,
8960 &objfile
->objfile_obstack
,
8961 hashtab_obstack_allocate
,
8962 dummy_obstack_deallocate
);
8965 /* Initialize the use of the DWP file for the current objfile.
8966 By convention the name of the DWP file is ${objfile}.dwp.
8967 The result is NULL if it can't be found. */
8969 static struct dwp_file
*
8970 open_and_init_dwp_file (const char *comp_dir
)
8972 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8973 struct dwp_file
*dwp_file
;
8976 struct cleanup
*cleanups
;
8978 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
8979 cleanups
= make_cleanup (xfree
, dwp_name
);
8981 dbfd
= open_dwop_file (dwp_name
, comp_dir
, 1);
8984 if (dwarf2_read_debug
)
8985 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
8986 do_cleanups (cleanups
);
8989 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
8990 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8991 dwp_name
, strlen (dwp_name
));
8992 dwp_file
->dbfd
= dbfd
;
8993 do_cleanups (cleanups
);
8995 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwp_file
);
8997 /* +1: section 0 is unused */
8998 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
8999 dwp_file
->elf_sections
=
9000 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9001 dwp_file
->num_sections
, asection
*);
9003 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9005 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9007 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9009 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9011 discard_cleanups (cleanups
);
9013 if (dwarf2_read_debug
)
9015 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9016 fprintf_unfiltered (gdb_stdlog
,
9017 " %u CUs, %u TUs\n",
9018 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9019 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9025 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9026 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9027 or in the DWP file for the objfile, referenced by THIS_UNIT.
9028 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9029 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9031 This is called, for example, when wanting to read a variable with a
9032 complex location. Therefore we don't want to do file i/o for every call.
9033 Therefore we don't want to look for a DWO file on every call.
9034 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9035 then we check if we've already seen DWO_NAME, and only THEN do we check
9038 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9039 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9041 static struct dwo_unit
*
9042 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9043 const char *dwo_name
, const char *comp_dir
,
9044 ULONGEST signature
, int is_debug_types
)
9046 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9047 const char *kind
= is_debug_types
? "TU" : "CU";
9048 void **dwo_file_slot
;
9049 struct dwo_file
*dwo_file
;
9050 struct dwp_file
*dwp_file
;
9052 /* Have we already read SIGNATURE from a DWP file? */
9054 if (! dwarf2_per_objfile
->dwp_checked
)
9056 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file (comp_dir
);
9057 dwarf2_per_objfile
->dwp_checked
= 1;
9059 dwp_file
= dwarf2_per_objfile
->dwp_file
;
9061 if (dwp_file
!= NULL
)
9063 const struct dwp_hash_table
*dwp_htab
=
9064 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9066 if (dwp_htab
!= NULL
)
9068 struct dwo_unit
*dwo_cutu
=
9069 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, signature
, is_debug_types
);
9071 if (dwo_cutu
!= NULL
)
9073 if (dwarf2_read_debug
)
9075 fprintf_unfiltered (gdb_stdlog
,
9076 "Virtual DWO %s %s found: @%s\n",
9077 kind
, hex_string (signature
),
9078 host_address_to_string (dwo_cutu
));
9085 /* Have we already seen DWO_NAME? */
9087 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
);
9088 if (*dwo_file_slot
== NULL
)
9090 /* Read in the file and build a table of the DWOs it contains. */
9091 *dwo_file_slot
= open_and_init_dwo_file (dwo_name
, comp_dir
);
9093 /* NOTE: This will be NULL if unable to open the file. */
9094 dwo_file
= *dwo_file_slot
;
9096 if (dwo_file
!= NULL
)
9098 htab_t htab
= is_debug_types
? dwo_file
->tus
: dwo_file
->cus
;
9102 struct dwo_unit find_dwo_cutu
, *dwo_cutu
;
9104 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9105 find_dwo_cutu
.signature
= signature
;
9106 dwo_cutu
= htab_find (htab
, &find_dwo_cutu
);
9108 if (dwo_cutu
!= NULL
)
9110 if (dwarf2_read_debug
)
9112 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9113 kind
, dwo_name
, hex_string (signature
),
9114 host_address_to_string (dwo_cutu
));
9121 /* We didn't find it. This could mean a dwo_id mismatch, or
9122 someone deleted the DWO/DWP file, or the search path isn't set up
9123 correctly to find the file. */
9125 if (dwarf2_read_debug
)
9127 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9128 kind
, dwo_name
, hex_string (signature
));
9131 complaint (&symfile_complaints
,
9132 _("Could not find DWO CU referenced by CU at offset 0x%x"
9134 this_unit
->offset
.sect_off
, objfile
->name
);
9138 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9139 See lookup_dwo_cutu_unit for details. */
9141 static struct dwo_unit
*
9142 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9143 const char *dwo_name
, const char *comp_dir
,
9146 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9149 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9150 See lookup_dwo_cutu_unit for details. */
9152 static struct dwo_unit
*
9153 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9154 const char *dwo_name
, const char *comp_dir
)
9156 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9159 /* Free all resources associated with DWO_FILE.
9160 Close the DWO file and munmap the sections.
9161 All memory should be on the objfile obstack. */
9164 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9167 struct dwarf2_section_info
*section
;
9169 gdb_assert (dwo_file
->dbfd
!= objfile
->obfd
);
9170 gdb_bfd_unref (dwo_file
->dbfd
);
9172 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9175 /* Wrapper for free_dwo_file for use in cleanups. */
9178 free_dwo_file_cleanup (void *arg
)
9180 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9181 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9183 free_dwo_file (dwo_file
, objfile
);
9186 /* Traversal function for free_dwo_files. */
9189 free_dwo_file_from_slot (void **slot
, void *info
)
9191 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9192 struct objfile
*objfile
= (struct objfile
*) info
;
9194 free_dwo_file (dwo_file
, objfile
);
9199 /* Free all resources associated with DWO_FILES. */
9202 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9204 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9207 /* Read in various DIEs. */
9209 /* qsort helper for inherit_abstract_dies. */
9212 unsigned_int_compar (const void *ap
, const void *bp
)
9214 unsigned int a
= *(unsigned int *) ap
;
9215 unsigned int b
= *(unsigned int *) bp
;
9217 return (a
> b
) - (b
> a
);
9220 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9221 Inherit only the children of the DW_AT_abstract_origin DIE not being
9222 already referenced by DW_AT_abstract_origin from the children of the
9226 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9228 struct die_info
*child_die
;
9229 unsigned die_children_count
;
9230 /* CU offsets which were referenced by children of the current DIE. */
9231 sect_offset
*offsets
;
9232 sect_offset
*offsets_end
, *offsetp
;
9233 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9234 struct die_info
*origin_die
;
9235 /* Iterator of the ORIGIN_DIE children. */
9236 struct die_info
*origin_child_die
;
9237 struct cleanup
*cleanups
;
9238 struct attribute
*attr
;
9239 struct dwarf2_cu
*origin_cu
;
9240 struct pending
**origin_previous_list_in_scope
;
9242 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9246 /* Note that following die references may follow to a die in a
9250 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9252 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9254 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9255 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9257 if (die
->tag
!= origin_die
->tag
9258 && !(die
->tag
== DW_TAG_inlined_subroutine
9259 && origin_die
->tag
== DW_TAG_subprogram
))
9260 complaint (&symfile_complaints
,
9261 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9262 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9264 child_die
= die
->child
;
9265 die_children_count
= 0;
9266 while (child_die
&& child_die
->tag
)
9268 child_die
= sibling_die (child_die
);
9269 die_children_count
++;
9271 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9272 cleanups
= make_cleanup (xfree
, offsets
);
9274 offsets_end
= offsets
;
9275 child_die
= die
->child
;
9276 while (child_die
&& child_die
->tag
)
9278 /* For each CHILD_DIE, find the corresponding child of
9279 ORIGIN_DIE. If there is more than one layer of
9280 DW_AT_abstract_origin, follow them all; there shouldn't be,
9281 but GCC versions at least through 4.4 generate this (GCC PR
9283 struct die_info
*child_origin_die
= child_die
;
9284 struct dwarf2_cu
*child_origin_cu
= cu
;
9288 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9292 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9296 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9297 counterpart may exist. */
9298 if (child_origin_die
!= child_die
)
9300 if (child_die
->tag
!= child_origin_die
->tag
9301 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9302 && child_origin_die
->tag
== DW_TAG_subprogram
))
9303 complaint (&symfile_complaints
,
9304 _("Child DIE 0x%x and its abstract origin 0x%x have "
9305 "different tags"), child_die
->offset
.sect_off
,
9306 child_origin_die
->offset
.sect_off
);
9307 if (child_origin_die
->parent
!= origin_die
)
9308 complaint (&symfile_complaints
,
9309 _("Child DIE 0x%x and its abstract origin 0x%x have "
9310 "different parents"), child_die
->offset
.sect_off
,
9311 child_origin_die
->offset
.sect_off
);
9313 *offsets_end
++ = child_origin_die
->offset
;
9315 child_die
= sibling_die (child_die
);
9317 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9318 unsigned_int_compar
);
9319 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9320 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9321 complaint (&symfile_complaints
,
9322 _("Multiple children of DIE 0x%x refer "
9323 "to DIE 0x%x as their abstract origin"),
9324 die
->offset
.sect_off
, offsetp
->sect_off
);
9327 origin_child_die
= origin_die
->child
;
9328 while (origin_child_die
&& origin_child_die
->tag
)
9330 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9331 while (offsetp
< offsets_end
9332 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9334 if (offsetp
>= offsets_end
9335 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9337 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9338 process_die (origin_child_die
, origin_cu
);
9340 origin_child_die
= sibling_die (origin_child_die
);
9342 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9344 do_cleanups (cleanups
);
9348 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9350 struct objfile
*objfile
= cu
->objfile
;
9351 struct context_stack
*new;
9354 struct die_info
*child_die
;
9355 struct attribute
*attr
, *call_line
, *call_file
;
9358 struct block
*block
;
9359 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9360 VEC (symbolp
) *template_args
= NULL
;
9361 struct template_symbol
*templ_func
= NULL
;
9365 /* If we do not have call site information, we can't show the
9366 caller of this inlined function. That's too confusing, so
9367 only use the scope for local variables. */
9368 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9369 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9370 if (call_line
== NULL
|| call_file
== NULL
)
9372 read_lexical_block_scope (die
, cu
);
9377 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9379 name
= dwarf2_name (die
, cu
);
9381 /* Ignore functions with missing or empty names. These are actually
9382 illegal according to the DWARF standard. */
9385 complaint (&symfile_complaints
,
9386 _("missing name for subprogram DIE at %d"),
9387 die
->offset
.sect_off
);
9391 /* Ignore functions with missing or invalid low and high pc attributes. */
9392 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9394 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9395 if (!attr
|| !DW_UNSND (attr
))
9396 complaint (&symfile_complaints
,
9397 _("cannot get low and high bounds "
9398 "for subprogram DIE at %d"),
9399 die
->offset
.sect_off
);
9406 /* If we have any template arguments, then we must allocate a
9407 different sort of symbol. */
9408 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9410 if (child_die
->tag
== DW_TAG_template_type_param
9411 || child_die
->tag
== DW_TAG_template_value_param
)
9413 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
9414 struct template_symbol
);
9415 templ_func
->base
.is_cplus_template_function
= 1;
9420 new = push_context (0, lowpc
);
9421 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9422 (struct symbol
*) templ_func
);
9424 /* If there is a location expression for DW_AT_frame_base, record
9426 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9428 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9429 expression is being recorded directly in the function's symbol
9430 and not in a separate frame-base object. I guess this hack is
9431 to avoid adding some sort of frame-base adjunct/annex to the
9432 function's symbol :-(. The problem with doing this is that it
9433 results in a function symbol with a location expression that
9434 has nothing to do with the location of the function, ouch! The
9435 relationship should be: a function's symbol has-a frame base; a
9436 frame-base has-a location expression. */
9437 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
9439 cu
->list_in_scope
= &local_symbols
;
9441 if (die
->child
!= NULL
)
9443 child_die
= die
->child
;
9444 while (child_die
&& child_die
->tag
)
9446 if (child_die
->tag
== DW_TAG_template_type_param
9447 || child_die
->tag
== DW_TAG_template_value_param
)
9449 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9452 VEC_safe_push (symbolp
, template_args
, arg
);
9455 process_die (child_die
, cu
);
9456 child_die
= sibling_die (child_die
);
9460 inherit_abstract_dies (die
, cu
);
9462 /* If we have a DW_AT_specification, we might need to import using
9463 directives from the context of the specification DIE. See the
9464 comment in determine_prefix. */
9465 if (cu
->language
== language_cplus
9466 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9468 struct dwarf2_cu
*spec_cu
= cu
;
9469 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9473 child_die
= spec_die
->child
;
9474 while (child_die
&& child_die
->tag
)
9476 if (child_die
->tag
== DW_TAG_imported_module
)
9477 process_die (child_die
, spec_cu
);
9478 child_die
= sibling_die (child_die
);
9481 /* In some cases, GCC generates specification DIEs that
9482 themselves contain DW_AT_specification attributes. */
9483 spec_die
= die_specification (spec_die
, &spec_cu
);
9487 new = pop_context ();
9488 /* Make a block for the local symbols within. */
9489 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9490 lowpc
, highpc
, objfile
);
9492 /* For C++, set the block's scope. */
9493 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9494 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
9495 determine_prefix (die
, cu
),
9496 processing_has_namespace_info
);
9498 /* If we have address ranges, record them. */
9499 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9501 /* Attach template arguments to function. */
9502 if (! VEC_empty (symbolp
, template_args
))
9504 gdb_assert (templ_func
!= NULL
);
9506 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9507 templ_func
->template_arguments
9508 = obstack_alloc (&objfile
->objfile_obstack
,
9509 (templ_func
->n_template_arguments
9510 * sizeof (struct symbol
*)));
9511 memcpy (templ_func
->template_arguments
,
9512 VEC_address (symbolp
, template_args
),
9513 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9514 VEC_free (symbolp
, template_args
);
9517 /* In C++, we can have functions nested inside functions (e.g., when
9518 a function declares a class that has methods). This means that
9519 when we finish processing a function scope, we may need to go
9520 back to building a containing block's symbol lists. */
9521 local_symbols
= new->locals
;
9522 using_directives
= new->using_directives
;
9524 /* If we've finished processing a top-level function, subsequent
9525 symbols go in the file symbol list. */
9526 if (outermost_context_p ())
9527 cu
->list_in_scope
= &file_symbols
;
9530 /* Process all the DIES contained within a lexical block scope. Start
9531 a new scope, process the dies, and then close the scope. */
9534 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9536 struct objfile
*objfile
= cu
->objfile
;
9537 struct context_stack
*new;
9538 CORE_ADDR lowpc
, highpc
;
9539 struct die_info
*child_die
;
9542 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9544 /* Ignore blocks with missing or invalid low and high pc attributes. */
9545 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9546 as multiple lexical blocks? Handling children in a sane way would
9547 be nasty. Might be easier to properly extend generic blocks to
9549 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9554 push_context (0, lowpc
);
9555 if (die
->child
!= NULL
)
9557 child_die
= die
->child
;
9558 while (child_die
&& child_die
->tag
)
9560 process_die (child_die
, cu
);
9561 child_die
= sibling_die (child_die
);
9564 new = pop_context ();
9566 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9569 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9572 /* Note that recording ranges after traversing children, as we
9573 do here, means that recording a parent's ranges entails
9574 walking across all its children's ranges as they appear in
9575 the address map, which is quadratic behavior.
9577 It would be nicer to record the parent's ranges before
9578 traversing its children, simply overriding whatever you find
9579 there. But since we don't even decide whether to create a
9580 block until after we've traversed its children, that's hard
9582 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9584 local_symbols
= new->locals
;
9585 using_directives
= new->using_directives
;
9588 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9591 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9593 struct objfile
*objfile
= cu
->objfile
;
9594 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9595 CORE_ADDR pc
, baseaddr
;
9596 struct attribute
*attr
;
9597 struct call_site
*call_site
, call_site_local
;
9600 struct die_info
*child_die
;
9602 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9604 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9607 complaint (&symfile_complaints
,
9608 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9609 "DIE 0x%x [in module %s]"),
9610 die
->offset
.sect_off
, objfile
->name
);
9613 pc
= DW_ADDR (attr
) + baseaddr
;
9615 if (cu
->call_site_htab
== NULL
)
9616 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9617 NULL
, &objfile
->objfile_obstack
,
9618 hashtab_obstack_allocate
, NULL
);
9619 call_site_local
.pc
= pc
;
9620 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9623 complaint (&symfile_complaints
,
9624 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9625 "DIE 0x%x [in module %s]"),
9626 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9630 /* Count parameters at the caller. */
9633 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9634 child_die
= sibling_die (child_die
))
9636 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9638 complaint (&symfile_complaints
,
9639 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9640 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9641 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9648 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9649 (sizeof (*call_site
)
9650 + (sizeof (*call_site
->parameter
)
9653 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9656 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9658 struct die_info
*func_die
;
9660 /* Skip also over DW_TAG_inlined_subroutine. */
9661 for (func_die
= die
->parent
;
9662 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9663 && func_die
->tag
!= DW_TAG_subroutine_type
;
9664 func_die
= func_die
->parent
);
9666 /* DW_AT_GNU_all_call_sites is a superset
9667 of DW_AT_GNU_all_tail_call_sites. */
9669 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9670 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9672 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9673 not complete. But keep CALL_SITE for look ups via call_site_htab,
9674 both the initial caller containing the real return address PC and
9675 the final callee containing the current PC of a chain of tail
9676 calls do not need to have the tail call list complete. But any
9677 function candidate for a virtual tail call frame searched via
9678 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9679 determined unambiguously. */
9683 struct type
*func_type
= NULL
;
9686 func_type
= get_die_type (func_die
, cu
);
9687 if (func_type
!= NULL
)
9689 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9691 /* Enlist this call site to the function. */
9692 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9693 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9696 complaint (&symfile_complaints
,
9697 _("Cannot find function owning DW_TAG_GNU_call_site "
9698 "DIE 0x%x [in module %s]"),
9699 die
->offset
.sect_off
, objfile
->name
);
9703 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9705 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9706 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9707 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9708 /* Keep NULL DWARF_BLOCK. */;
9709 else if (attr_form_is_block (attr
))
9711 struct dwarf2_locexpr_baton
*dlbaton
;
9713 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9714 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9715 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9716 dlbaton
->per_cu
= cu
->per_cu
;
9718 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9720 else if (is_ref_attr (attr
))
9722 struct dwarf2_cu
*target_cu
= cu
;
9723 struct die_info
*target_die
;
9725 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9726 gdb_assert (target_cu
->objfile
== objfile
);
9727 if (die_is_declaration (target_die
, target_cu
))
9729 const char *target_physname
;
9731 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9732 if (target_physname
== NULL
)
9733 complaint (&symfile_complaints
,
9734 _("DW_AT_GNU_call_site_target target DIE has invalid "
9735 "physname, for referencing DIE 0x%x [in module %s]"),
9736 die
->offset
.sect_off
, objfile
->name
);
9738 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
9744 /* DW_AT_entry_pc should be preferred. */
9745 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9746 complaint (&symfile_complaints
,
9747 _("DW_AT_GNU_call_site_target target DIE has invalid "
9748 "low pc, for referencing DIE 0x%x [in module %s]"),
9749 die
->offset
.sect_off
, objfile
->name
);
9751 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9755 complaint (&symfile_complaints
,
9756 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9757 "block nor reference, for DIE 0x%x [in module %s]"),
9758 die
->offset
.sect_off
, objfile
->name
);
9760 call_site
->per_cu
= cu
->per_cu
;
9762 for (child_die
= die
->child
;
9763 child_die
&& child_die
->tag
;
9764 child_die
= sibling_die (child_die
))
9766 struct call_site_parameter
*parameter
;
9767 struct attribute
*loc
, *origin
;
9769 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9771 /* Already printed the complaint above. */
9775 gdb_assert (call_site
->parameter_count
< nparams
);
9776 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9778 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9779 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9780 register is contained in DW_AT_GNU_call_site_value. */
9782 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9783 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9784 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9788 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9789 offset
= dwarf2_get_ref_die_offset (origin
);
9790 if (!offset_in_cu_p (&cu
->header
, offset
))
9792 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9793 binding can be done only inside one CU. Such referenced DIE
9794 therefore cannot be even moved to DW_TAG_partial_unit. */
9795 complaint (&symfile_complaints
,
9796 _("DW_AT_abstract_origin offset is not in CU for "
9797 "DW_TAG_GNU_call_site child DIE 0x%x "
9799 child_die
->offset
.sect_off
, objfile
->name
);
9802 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9803 - cu
->header
.offset
.sect_off
);
9805 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9807 complaint (&symfile_complaints
,
9808 _("No DW_FORM_block* DW_AT_location for "
9809 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9810 child_die
->offset
.sect_off
, objfile
->name
);
9815 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9816 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9817 if (parameter
->u
.dwarf_reg
!= -1)
9818 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9819 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9820 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9821 ¶meter
->u
.fb_offset
))
9822 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9825 complaint (&symfile_complaints
,
9826 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9827 "for DW_FORM_block* DW_AT_location is supported for "
9828 "DW_TAG_GNU_call_site child DIE 0x%x "
9830 child_die
->offset
.sect_off
, objfile
->name
);
9835 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9836 if (!attr_form_is_block (attr
))
9838 complaint (&symfile_complaints
,
9839 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9840 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9841 child_die
->offset
.sect_off
, objfile
->name
);
9844 parameter
->value
= DW_BLOCK (attr
)->data
;
9845 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9847 /* Parameters are not pre-cleared by memset above. */
9848 parameter
->data_value
= NULL
;
9849 parameter
->data_value_size
= 0;
9850 call_site
->parameter_count
++;
9852 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9855 if (!attr_form_is_block (attr
))
9856 complaint (&symfile_complaints
,
9857 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9858 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9859 child_die
->offset
.sect_off
, objfile
->name
);
9862 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9863 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9869 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9870 Return 1 if the attributes are present and valid, otherwise, return 0.
9871 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9874 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9875 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9876 struct partial_symtab
*ranges_pst
)
9878 struct objfile
*objfile
= cu
->objfile
;
9879 struct comp_unit_head
*cu_header
= &cu
->header
;
9880 bfd
*obfd
= objfile
->obfd
;
9881 unsigned int addr_size
= cu_header
->addr_size
;
9882 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9883 /* Base address selection entry. */
9894 found_base
= cu
->base_known
;
9895 base
= cu
->base_address
;
9897 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9898 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9900 complaint (&symfile_complaints
,
9901 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9905 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9907 /* Read in the largest possible address. */
9908 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9909 if ((marker
& mask
) == mask
)
9911 /* If we found the largest possible address, then
9912 read the base address. */
9913 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9914 buffer
+= 2 * addr_size
;
9915 offset
+= 2 * addr_size
;
9921 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9925 CORE_ADDR range_beginning
, range_end
;
9927 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9928 buffer
+= addr_size
;
9929 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9930 buffer
+= addr_size
;
9931 offset
+= 2 * addr_size
;
9933 /* An end of list marker is a pair of zero addresses. */
9934 if (range_beginning
== 0 && range_end
== 0)
9935 /* Found the end of list entry. */
9938 /* Each base address selection entry is a pair of 2 values.
9939 The first is the largest possible address, the second is
9940 the base address. Check for a base address here. */
9941 if ((range_beginning
& mask
) == mask
)
9943 /* If we found the largest possible address, then
9944 read the base address. */
9945 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9952 /* We have no valid base address for the ranges
9954 complaint (&symfile_complaints
,
9955 _("Invalid .debug_ranges data (no base address)"));
9959 if (range_beginning
> range_end
)
9961 /* Inverted range entries are invalid. */
9962 complaint (&symfile_complaints
,
9963 _("Invalid .debug_ranges data (inverted range)"));
9967 /* Empty range entries have no effect. */
9968 if (range_beginning
== range_end
)
9971 range_beginning
+= base
;
9974 /* A not-uncommon case of bad debug info.
9975 Don't pollute the addrmap with bad data. */
9976 if (range_beginning
+ baseaddr
== 0
9977 && !dwarf2_per_objfile
->has_section_at_zero
)
9979 complaint (&symfile_complaints
,
9980 _(".debug_ranges entry has start address of zero"
9981 " [in module %s]"), objfile
->name
);
9985 if (ranges_pst
!= NULL
)
9986 addrmap_set_empty (objfile
->psymtabs_addrmap
,
9987 range_beginning
+ baseaddr
,
9988 range_end
- 1 + baseaddr
,
9991 /* FIXME: This is recording everything as a low-high
9992 segment of consecutive addresses. We should have a
9993 data structure for discontiguous block ranges
9997 low
= range_beginning
;
10003 if (range_beginning
< low
)
10004 low
= range_beginning
;
10005 if (range_end
> high
)
10011 /* If the first entry is an end-of-list marker, the range
10012 describes an empty scope, i.e. no instructions. */
10018 *high_return
= high
;
10022 /* Get low and high pc attributes from a die. Return 1 if the attributes
10023 are present and valid, otherwise, return 0. Return -1 if the range is
10024 discontinuous, i.e. derived from DW_AT_ranges information. */
10027 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10028 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10029 struct partial_symtab
*pst
)
10031 struct attribute
*attr
;
10032 struct attribute
*attr_high
;
10034 CORE_ADDR high
= 0;
10037 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10040 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10043 low
= DW_ADDR (attr
);
10044 if (attr_high
->form
== DW_FORM_addr
10045 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10046 high
= DW_ADDR (attr_high
);
10048 high
= low
+ DW_UNSND (attr_high
);
10051 /* Found high w/o low attribute. */
10054 /* Found consecutive range of addresses. */
10059 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10062 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10063 We take advantage of the fact that DW_AT_ranges does not appear
10064 in DW_TAG_compile_unit of DWO files. */
10065 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10066 unsigned int ranges_offset
= (DW_UNSND (attr
)
10067 + (need_ranges_base
10071 /* Value of the DW_AT_ranges attribute is the offset in the
10072 .debug_ranges section. */
10073 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10075 /* Found discontinuous range of addresses. */
10080 /* read_partial_die has also the strict LOW < HIGH requirement. */
10084 /* When using the GNU linker, .gnu.linkonce. sections are used to
10085 eliminate duplicate copies of functions and vtables and such.
10086 The linker will arbitrarily choose one and discard the others.
10087 The AT_*_pc values for such functions refer to local labels in
10088 these sections. If the section from that file was discarded, the
10089 labels are not in the output, so the relocs get a value of 0.
10090 If this is a discarded function, mark the pc bounds as invalid,
10091 so that GDB will ignore it. */
10092 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10101 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10102 its low and high PC addresses. Do nothing if these addresses could not
10103 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10104 and HIGHPC to the high address if greater than HIGHPC. */
10107 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10108 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10109 struct dwarf2_cu
*cu
)
10111 CORE_ADDR low
, high
;
10112 struct die_info
*child
= die
->child
;
10114 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10116 *lowpc
= min (*lowpc
, low
);
10117 *highpc
= max (*highpc
, high
);
10120 /* If the language does not allow nested subprograms (either inside
10121 subprograms or lexical blocks), we're done. */
10122 if (cu
->language
!= language_ada
)
10125 /* Check all the children of the given DIE. If it contains nested
10126 subprograms, then check their pc bounds. Likewise, we need to
10127 check lexical blocks as well, as they may also contain subprogram
10129 while (child
&& child
->tag
)
10131 if (child
->tag
== DW_TAG_subprogram
10132 || child
->tag
== DW_TAG_lexical_block
)
10133 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10134 child
= sibling_die (child
);
10138 /* Get the low and high pc's represented by the scope DIE, and store
10139 them in *LOWPC and *HIGHPC. If the correct values can't be
10140 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10143 get_scope_pc_bounds (struct die_info
*die
,
10144 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10145 struct dwarf2_cu
*cu
)
10147 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10148 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10149 CORE_ADDR current_low
, current_high
;
10151 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10153 best_low
= current_low
;
10154 best_high
= current_high
;
10158 struct die_info
*child
= die
->child
;
10160 while (child
&& child
->tag
)
10162 switch (child
->tag
) {
10163 case DW_TAG_subprogram
:
10164 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10166 case DW_TAG_namespace
:
10167 case DW_TAG_module
:
10168 /* FIXME: carlton/2004-01-16: Should we do this for
10169 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10170 that current GCC's always emit the DIEs corresponding
10171 to definitions of methods of classes as children of a
10172 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10173 the DIEs giving the declarations, which could be
10174 anywhere). But I don't see any reason why the
10175 standards says that they have to be there. */
10176 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10178 if (current_low
!= ((CORE_ADDR
) -1))
10180 best_low
= min (best_low
, current_low
);
10181 best_high
= max (best_high
, current_high
);
10189 child
= sibling_die (child
);
10194 *highpc
= best_high
;
10197 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10201 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10202 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10204 struct objfile
*objfile
= cu
->objfile
;
10205 struct attribute
*attr
;
10206 struct attribute
*attr_high
;
10208 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10211 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10214 CORE_ADDR low
= DW_ADDR (attr
);
10216 if (attr_high
->form
== DW_FORM_addr
10217 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10218 high
= DW_ADDR (attr_high
);
10220 high
= low
+ DW_UNSND (attr_high
);
10222 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10226 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10229 bfd
*obfd
= objfile
->obfd
;
10230 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10231 We take advantage of the fact that DW_AT_ranges does not appear
10232 in DW_TAG_compile_unit of DWO files. */
10233 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10235 /* The value of the DW_AT_ranges attribute is the offset of the
10236 address range list in the .debug_ranges section. */
10237 unsigned long offset
= (DW_UNSND (attr
)
10238 + (need_ranges_base
? cu
->ranges_base
: 0));
10239 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10241 /* For some target architectures, but not others, the
10242 read_address function sign-extends the addresses it returns.
10243 To recognize base address selection entries, we need a
10245 unsigned int addr_size
= cu
->header
.addr_size
;
10246 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10248 /* The base address, to which the next pair is relative. Note
10249 that this 'base' is a DWARF concept: most entries in a range
10250 list are relative, to reduce the number of relocs against the
10251 debugging information. This is separate from this function's
10252 'baseaddr' argument, which GDB uses to relocate debugging
10253 information from a shared library based on the address at
10254 which the library was loaded. */
10255 CORE_ADDR base
= cu
->base_address
;
10256 int base_known
= cu
->base_known
;
10258 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10259 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10261 complaint (&symfile_complaints
,
10262 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10269 unsigned int bytes_read
;
10270 CORE_ADDR start
, end
;
10272 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10273 buffer
+= bytes_read
;
10274 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10275 buffer
+= bytes_read
;
10277 /* Did we find the end of the range list? */
10278 if (start
== 0 && end
== 0)
10281 /* Did we find a base address selection entry? */
10282 else if ((start
& base_select_mask
) == base_select_mask
)
10288 /* We found an ordinary address range. */
10293 complaint (&symfile_complaints
,
10294 _("Invalid .debug_ranges data "
10295 "(no base address)"));
10301 /* Inverted range entries are invalid. */
10302 complaint (&symfile_complaints
,
10303 _("Invalid .debug_ranges data "
10304 "(inverted range)"));
10308 /* Empty range entries have no effect. */
10312 start
+= base
+ baseaddr
;
10313 end
+= base
+ baseaddr
;
10315 /* A not-uncommon case of bad debug info.
10316 Don't pollute the addrmap with bad data. */
10317 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10319 complaint (&symfile_complaints
,
10320 _(".debug_ranges entry has start address of zero"
10321 " [in module %s]"), objfile
->name
);
10325 record_block_range (block
, start
, end
- 1);
10331 /* Check whether the producer field indicates either of GCC < 4.6, or the
10332 Intel C/C++ compiler, and cache the result in CU. */
10335 check_producer (struct dwarf2_cu
*cu
)
10338 int major
, minor
, release
;
10340 if (cu
->producer
== NULL
)
10342 /* For unknown compilers expect their behavior is DWARF version
10345 GCC started to support .debug_types sections by -gdwarf-4 since
10346 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10347 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10348 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10349 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10351 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10353 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10355 cs
= &cu
->producer
[strlen ("GNU ")];
10356 while (*cs
&& !isdigit (*cs
))
10358 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10360 /* Not recognized as GCC. */
10364 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10365 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10368 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10369 cu
->producer_is_icc
= 1;
10372 /* For other non-GCC compilers, expect their behavior is DWARF version
10376 cu
->checked_producer
= 1;
10379 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10380 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10381 during 4.6.0 experimental. */
10384 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10386 if (!cu
->checked_producer
)
10387 check_producer (cu
);
10389 return cu
->producer_is_gxx_lt_4_6
;
10392 /* Return the default accessibility type if it is not overriden by
10393 DW_AT_accessibility. */
10395 static enum dwarf_access_attribute
10396 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10398 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10400 /* The default DWARF 2 accessibility for members is public, the default
10401 accessibility for inheritance is private. */
10403 if (die
->tag
!= DW_TAG_inheritance
)
10404 return DW_ACCESS_public
;
10406 return DW_ACCESS_private
;
10410 /* DWARF 3+ defines the default accessibility a different way. The same
10411 rules apply now for DW_TAG_inheritance as for the members and it only
10412 depends on the container kind. */
10414 if (die
->parent
->tag
== DW_TAG_class_type
)
10415 return DW_ACCESS_private
;
10417 return DW_ACCESS_public
;
10421 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10422 offset. If the attribute was not found return 0, otherwise return
10423 1. If it was found but could not properly be handled, set *OFFSET
10427 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10430 struct attribute
*attr
;
10432 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10437 /* Note that we do not check for a section offset first here.
10438 This is because DW_AT_data_member_location is new in DWARF 4,
10439 so if we see it, we can assume that a constant form is really
10440 a constant and not a section offset. */
10441 if (attr_form_is_constant (attr
))
10442 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10443 else if (attr_form_is_section_offset (attr
))
10444 dwarf2_complex_location_expr_complaint ();
10445 else if (attr_form_is_block (attr
))
10446 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10448 dwarf2_complex_location_expr_complaint ();
10456 /* Add an aggregate field to the field list. */
10459 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10460 struct dwarf2_cu
*cu
)
10462 struct objfile
*objfile
= cu
->objfile
;
10463 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10464 struct nextfield
*new_field
;
10465 struct attribute
*attr
;
10467 char *fieldname
= "";
10469 /* Allocate a new field list entry and link it in. */
10470 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10471 make_cleanup (xfree
, new_field
);
10472 memset (new_field
, 0, sizeof (struct nextfield
));
10474 if (die
->tag
== DW_TAG_inheritance
)
10476 new_field
->next
= fip
->baseclasses
;
10477 fip
->baseclasses
= new_field
;
10481 new_field
->next
= fip
->fields
;
10482 fip
->fields
= new_field
;
10486 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10488 new_field
->accessibility
= DW_UNSND (attr
);
10490 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10491 if (new_field
->accessibility
!= DW_ACCESS_public
)
10492 fip
->non_public_fields
= 1;
10494 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10496 new_field
->virtuality
= DW_UNSND (attr
);
10498 new_field
->virtuality
= DW_VIRTUALITY_none
;
10500 fp
= &new_field
->field
;
10502 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10506 /* Data member other than a C++ static data member. */
10508 /* Get type of field. */
10509 fp
->type
= die_type (die
, cu
);
10511 SET_FIELD_BITPOS (*fp
, 0);
10513 /* Get bit size of field (zero if none). */
10514 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10517 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10521 FIELD_BITSIZE (*fp
) = 0;
10524 /* Get bit offset of field. */
10525 if (handle_data_member_location (die
, cu
, &offset
))
10526 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10527 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10530 if (gdbarch_bits_big_endian (gdbarch
))
10532 /* For big endian bits, the DW_AT_bit_offset gives the
10533 additional bit offset from the MSB of the containing
10534 anonymous object to the MSB of the field. We don't
10535 have to do anything special since we don't need to
10536 know the size of the anonymous object. */
10537 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10541 /* For little endian bits, compute the bit offset to the
10542 MSB of the anonymous object, subtract off the number of
10543 bits from the MSB of the field to the MSB of the
10544 object, and then subtract off the number of bits of
10545 the field itself. The result is the bit offset of
10546 the LSB of the field. */
10547 int anonymous_size
;
10548 int bit_offset
= DW_UNSND (attr
);
10550 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10553 /* The size of the anonymous object containing
10554 the bit field is explicit, so use the
10555 indicated size (in bytes). */
10556 anonymous_size
= DW_UNSND (attr
);
10560 /* The size of the anonymous object containing
10561 the bit field must be inferred from the type
10562 attribute of the data member containing the
10564 anonymous_size
= TYPE_LENGTH (fp
->type
);
10566 SET_FIELD_BITPOS (*fp
,
10567 (FIELD_BITPOS (*fp
)
10568 + anonymous_size
* bits_per_byte
10569 - bit_offset
- FIELD_BITSIZE (*fp
)));
10573 /* Get name of field. */
10574 fieldname
= dwarf2_name (die
, cu
);
10575 if (fieldname
== NULL
)
10578 /* The name is already allocated along with this objfile, so we don't
10579 need to duplicate it for the type. */
10580 fp
->name
= fieldname
;
10582 /* Change accessibility for artificial fields (e.g. virtual table
10583 pointer or virtual base class pointer) to private. */
10584 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10586 FIELD_ARTIFICIAL (*fp
) = 1;
10587 new_field
->accessibility
= DW_ACCESS_private
;
10588 fip
->non_public_fields
= 1;
10591 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10593 /* C++ static member. */
10595 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10596 is a declaration, but all versions of G++ as of this writing
10597 (so through at least 3.2.1) incorrectly generate
10598 DW_TAG_variable tags. */
10600 const char *physname
;
10602 /* Get name of field. */
10603 fieldname
= dwarf2_name (die
, cu
);
10604 if (fieldname
== NULL
)
10607 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10609 /* Only create a symbol if this is an external value.
10610 new_symbol checks this and puts the value in the global symbol
10611 table, which we want. If it is not external, new_symbol
10612 will try to put the value in cu->list_in_scope which is wrong. */
10613 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10615 /* A static const member, not much different than an enum as far as
10616 we're concerned, except that we can support more types. */
10617 new_symbol (die
, NULL
, cu
);
10620 /* Get physical name. */
10621 physname
= dwarf2_physname (fieldname
, die
, cu
);
10623 /* The name is already allocated along with this objfile, so we don't
10624 need to duplicate it for the type. */
10625 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10626 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10627 FIELD_NAME (*fp
) = fieldname
;
10629 else if (die
->tag
== DW_TAG_inheritance
)
10633 /* C++ base class field. */
10634 if (handle_data_member_location (die
, cu
, &offset
))
10635 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10636 FIELD_BITSIZE (*fp
) = 0;
10637 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10638 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10639 fip
->nbaseclasses
++;
10643 /* Add a typedef defined in the scope of the FIP's class. */
10646 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10647 struct dwarf2_cu
*cu
)
10649 struct objfile
*objfile
= cu
->objfile
;
10650 struct typedef_field_list
*new_field
;
10651 struct attribute
*attr
;
10652 struct typedef_field
*fp
;
10653 char *fieldname
= "";
10655 /* Allocate a new field list entry and link it in. */
10656 new_field
= xzalloc (sizeof (*new_field
));
10657 make_cleanup (xfree
, new_field
);
10659 gdb_assert (die
->tag
== DW_TAG_typedef
);
10661 fp
= &new_field
->field
;
10663 /* Get name of field. */
10664 fp
->name
= dwarf2_name (die
, cu
);
10665 if (fp
->name
== NULL
)
10668 fp
->type
= read_type_die (die
, cu
);
10670 new_field
->next
= fip
->typedef_field_list
;
10671 fip
->typedef_field_list
= new_field
;
10672 fip
->typedef_field_list_count
++;
10675 /* Create the vector of fields, and attach it to the type. */
10678 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10679 struct dwarf2_cu
*cu
)
10681 int nfields
= fip
->nfields
;
10683 /* Record the field count, allocate space for the array of fields,
10684 and create blank accessibility bitfields if necessary. */
10685 TYPE_NFIELDS (type
) = nfields
;
10686 TYPE_FIELDS (type
) = (struct field
*)
10687 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10688 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10690 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10692 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10694 TYPE_FIELD_PRIVATE_BITS (type
) =
10695 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10696 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10698 TYPE_FIELD_PROTECTED_BITS (type
) =
10699 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10700 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10702 TYPE_FIELD_IGNORE_BITS (type
) =
10703 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10704 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10707 /* If the type has baseclasses, allocate and clear a bit vector for
10708 TYPE_FIELD_VIRTUAL_BITS. */
10709 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10711 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10712 unsigned char *pointer
;
10714 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10715 pointer
= TYPE_ALLOC (type
, num_bytes
);
10716 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10717 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10718 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10721 /* Copy the saved-up fields into the field vector. Start from the head of
10722 the list, adding to the tail of the field array, so that they end up in
10723 the same order in the array in which they were added to the list. */
10724 while (nfields
-- > 0)
10726 struct nextfield
*fieldp
;
10730 fieldp
= fip
->fields
;
10731 fip
->fields
= fieldp
->next
;
10735 fieldp
= fip
->baseclasses
;
10736 fip
->baseclasses
= fieldp
->next
;
10739 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10740 switch (fieldp
->accessibility
)
10742 case DW_ACCESS_private
:
10743 if (cu
->language
!= language_ada
)
10744 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10747 case DW_ACCESS_protected
:
10748 if (cu
->language
!= language_ada
)
10749 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10752 case DW_ACCESS_public
:
10756 /* Unknown accessibility. Complain and treat it as public. */
10758 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10759 fieldp
->accessibility
);
10763 if (nfields
< fip
->nbaseclasses
)
10765 switch (fieldp
->virtuality
)
10767 case DW_VIRTUALITY_virtual
:
10768 case DW_VIRTUALITY_pure_virtual
:
10769 if (cu
->language
== language_ada
)
10770 error (_("unexpected virtuality in component of Ada type"));
10771 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10778 /* Return true if this member function is a constructor, false
10782 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
10784 const char *fieldname
;
10785 const char *typename
;
10788 if (die
->parent
== NULL
)
10791 if (die
->parent
->tag
!= DW_TAG_structure_type
10792 && die
->parent
->tag
!= DW_TAG_union_type
10793 && die
->parent
->tag
!= DW_TAG_class_type
)
10796 fieldname
= dwarf2_name (die
, cu
);
10797 typename
= dwarf2_name (die
->parent
, cu
);
10798 if (fieldname
== NULL
|| typename
== NULL
)
10801 len
= strlen (fieldname
);
10802 return (strncmp (fieldname
, typename
, len
) == 0
10803 && (typename
[len
] == '\0' || typename
[len
] == '<'));
10806 /* Add a member function to the proper fieldlist. */
10809 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10810 struct type
*type
, struct dwarf2_cu
*cu
)
10812 struct objfile
*objfile
= cu
->objfile
;
10813 struct attribute
*attr
;
10814 struct fnfieldlist
*flp
;
10816 struct fn_field
*fnp
;
10818 struct nextfnfield
*new_fnfield
;
10819 struct type
*this_type
;
10820 enum dwarf_access_attribute accessibility
;
10822 if (cu
->language
== language_ada
)
10823 error (_("unexpected member function in Ada type"));
10825 /* Get name of member function. */
10826 fieldname
= dwarf2_name (die
, cu
);
10827 if (fieldname
== NULL
)
10830 /* Look up member function name in fieldlist. */
10831 for (i
= 0; i
< fip
->nfnfields
; i
++)
10833 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10837 /* Create new list element if necessary. */
10838 if (i
< fip
->nfnfields
)
10839 flp
= &fip
->fnfieldlists
[i
];
10842 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10844 fip
->fnfieldlists
= (struct fnfieldlist
*)
10845 xrealloc (fip
->fnfieldlists
,
10846 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10847 * sizeof (struct fnfieldlist
));
10848 if (fip
->nfnfields
== 0)
10849 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10851 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10852 flp
->name
= fieldname
;
10855 i
= fip
->nfnfields
++;
10858 /* Create a new member function field and chain it to the field list
10860 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10861 make_cleanup (xfree
, new_fnfield
);
10862 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10863 new_fnfield
->next
= flp
->head
;
10864 flp
->head
= new_fnfield
;
10867 /* Fill in the member function field info. */
10868 fnp
= &new_fnfield
->fnfield
;
10870 /* Delay processing of the physname until later. */
10871 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10873 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10878 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10879 fnp
->physname
= physname
? physname
: "";
10882 fnp
->type
= alloc_type (objfile
);
10883 this_type
= read_type_die (die
, cu
);
10884 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10886 int nparams
= TYPE_NFIELDS (this_type
);
10888 /* TYPE is the domain of this method, and THIS_TYPE is the type
10889 of the method itself (TYPE_CODE_METHOD). */
10890 smash_to_method_type (fnp
->type
, type
,
10891 TYPE_TARGET_TYPE (this_type
),
10892 TYPE_FIELDS (this_type
),
10893 TYPE_NFIELDS (this_type
),
10894 TYPE_VARARGS (this_type
));
10896 /* Handle static member functions.
10897 Dwarf2 has no clean way to discern C++ static and non-static
10898 member functions. G++ helps GDB by marking the first
10899 parameter for non-static member functions (which is the this
10900 pointer) as artificial. We obtain this information from
10901 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10902 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10903 fnp
->voffset
= VOFFSET_STATIC
;
10906 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10907 dwarf2_full_name (fieldname
, die
, cu
));
10909 /* Get fcontext from DW_AT_containing_type if present. */
10910 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10911 fnp
->fcontext
= die_containing_type (die
, cu
);
10913 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10914 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10916 /* Get accessibility. */
10917 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10919 accessibility
= DW_UNSND (attr
);
10921 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10922 switch (accessibility
)
10924 case DW_ACCESS_private
:
10925 fnp
->is_private
= 1;
10927 case DW_ACCESS_protected
:
10928 fnp
->is_protected
= 1;
10932 /* Check for artificial methods. */
10933 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
10934 if (attr
&& DW_UNSND (attr
) != 0)
10935 fnp
->is_artificial
= 1;
10937 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
10939 /* Get index in virtual function table if it is a virtual member
10940 function. For older versions of GCC, this is an offset in the
10941 appropriate virtual table, as specified by DW_AT_containing_type.
10942 For everyone else, it is an expression to be evaluated relative
10943 to the object address. */
10945 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
10948 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
10950 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
10952 /* Old-style GCC. */
10953 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
10955 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10956 || (DW_BLOCK (attr
)->size
> 1
10957 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
10958 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
10960 struct dwarf_block blk
;
10963 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10965 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
10966 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
10967 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10968 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
10969 dwarf2_complex_location_expr_complaint ();
10971 fnp
->voffset
/= cu
->header
.addr_size
;
10975 dwarf2_complex_location_expr_complaint ();
10977 if (!fnp
->fcontext
)
10978 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
10980 else if (attr_form_is_section_offset (attr
))
10982 dwarf2_complex_location_expr_complaint ();
10986 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
10992 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10993 if (attr
&& DW_UNSND (attr
))
10995 /* GCC does this, as of 2008-08-25; PR debug/37237. */
10996 complaint (&symfile_complaints
,
10997 _("Member function \"%s\" (offset %d) is virtual "
10998 "but the vtable offset is not specified"),
10999 fieldname
, die
->offset
.sect_off
);
11000 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11001 TYPE_CPLUS_DYNAMIC (type
) = 1;
11006 /* Create the vector of member function fields, and attach it to the type. */
11009 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11010 struct dwarf2_cu
*cu
)
11012 struct fnfieldlist
*flp
;
11015 if (cu
->language
== language_ada
)
11016 error (_("unexpected member functions in Ada type"));
11018 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11019 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11020 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11022 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11024 struct nextfnfield
*nfp
= flp
->head
;
11025 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11028 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11029 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11030 fn_flp
->fn_fields
= (struct fn_field
*)
11031 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11032 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11033 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11036 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11039 /* Returns non-zero if NAME is the name of a vtable member in CU's
11040 language, zero otherwise. */
11042 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11044 static const char vptr
[] = "_vptr";
11045 static const char vtable
[] = "vtable";
11047 /* Look for the C++ and Java forms of the vtable. */
11048 if ((cu
->language
== language_java
11049 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11050 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11051 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11057 /* GCC outputs unnamed structures that are really pointers to member
11058 functions, with the ABI-specified layout. If TYPE describes
11059 such a structure, smash it into a member function type.
11061 GCC shouldn't do this; it should just output pointer to member DIEs.
11062 This is GCC PR debug/28767. */
11065 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11067 struct type
*pfn_type
, *domain_type
, *new_type
;
11069 /* Check for a structure with no name and two children. */
11070 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11073 /* Check for __pfn and __delta members. */
11074 if (TYPE_FIELD_NAME (type
, 0) == NULL
11075 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11076 || TYPE_FIELD_NAME (type
, 1) == NULL
11077 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11080 /* Find the type of the method. */
11081 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11082 if (pfn_type
== NULL
11083 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11084 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11087 /* Look for the "this" argument. */
11088 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11089 if (TYPE_NFIELDS (pfn_type
) == 0
11090 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11091 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11094 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11095 new_type
= alloc_type (objfile
);
11096 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11097 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11098 TYPE_VARARGS (pfn_type
));
11099 smash_to_methodptr_type (type
, new_type
);
11102 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11106 producer_is_icc (struct dwarf2_cu
*cu
)
11108 if (!cu
->checked_producer
)
11109 check_producer (cu
);
11111 return cu
->producer_is_icc
;
11114 /* Called when we find the DIE that starts a structure or union scope
11115 (definition) to create a type for the structure or union. Fill in
11116 the type's name and general properties; the members will not be
11117 processed until process_structure_type.
11119 NOTE: we need to call these functions regardless of whether or not the
11120 DIE has a DW_AT_name attribute, since it might be an anonymous
11121 structure or union. This gets the type entered into our set of
11122 user defined types.
11124 However, if the structure is incomplete (an opaque struct/union)
11125 then suppress creating a symbol table entry for it since gdb only
11126 wants to find the one with the complete definition. Note that if
11127 it is complete, we just call new_symbol, which does it's own
11128 checking about whether the struct/union is anonymous or not (and
11129 suppresses creating a symbol table entry itself). */
11131 static struct type
*
11132 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11134 struct objfile
*objfile
= cu
->objfile
;
11136 struct attribute
*attr
;
11139 /* If the definition of this type lives in .debug_types, read that type.
11140 Don't follow DW_AT_specification though, that will take us back up
11141 the chain and we want to go down. */
11142 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11145 struct dwarf2_cu
*type_cu
= cu
;
11146 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11148 /* We could just recurse on read_structure_type, but we need to call
11149 get_die_type to ensure only one type for this DIE is created.
11150 This is important, for example, because for c++ classes we need
11151 TYPE_NAME set which is only done by new_symbol. Blech. */
11152 type
= read_type_die (type_die
, type_cu
);
11154 /* TYPE_CU may not be the same as CU.
11155 Ensure TYPE is recorded in CU's type_hash table. */
11156 return set_die_type (die
, type
, cu
);
11159 type
= alloc_type (objfile
);
11160 INIT_CPLUS_SPECIFIC (type
);
11162 name
= dwarf2_name (die
, cu
);
11165 if (cu
->language
== language_cplus
11166 || cu
->language
== language_java
)
11168 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
11170 /* dwarf2_full_name might have already finished building the DIE's
11171 type. If so, there is no need to continue. */
11172 if (get_die_type (die
, cu
) != NULL
)
11173 return get_die_type (die
, cu
);
11175 TYPE_TAG_NAME (type
) = full_name
;
11176 if (die
->tag
== DW_TAG_structure_type
11177 || die
->tag
== DW_TAG_class_type
)
11178 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11182 /* The name is already allocated along with this objfile, so
11183 we don't need to duplicate it for the type. */
11184 TYPE_TAG_NAME (type
) = (char *) name
;
11185 if (die
->tag
== DW_TAG_class_type
)
11186 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11190 if (die
->tag
== DW_TAG_structure_type
)
11192 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11194 else if (die
->tag
== DW_TAG_union_type
)
11196 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11200 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11203 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11204 TYPE_DECLARED_CLASS (type
) = 1;
11206 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11209 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11213 TYPE_LENGTH (type
) = 0;
11216 if (producer_is_icc (cu
))
11218 /* ICC does not output the required DW_AT_declaration
11219 on incomplete types, but gives them a size of zero. */
11222 TYPE_STUB_SUPPORTED (type
) = 1;
11224 if (die_is_declaration (die
, cu
))
11225 TYPE_STUB (type
) = 1;
11226 else if (attr
== NULL
&& die
->child
== NULL
11227 && producer_is_realview (cu
->producer
))
11228 /* RealView does not output the required DW_AT_declaration
11229 on incomplete types. */
11230 TYPE_STUB (type
) = 1;
11232 /* We need to add the type field to the die immediately so we don't
11233 infinitely recurse when dealing with pointers to the structure
11234 type within the structure itself. */
11235 set_die_type (die
, type
, cu
);
11237 /* set_die_type should be already done. */
11238 set_descriptive_type (type
, die
, cu
);
11243 /* Finish creating a structure or union type, including filling in
11244 its members and creating a symbol for it. */
11247 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11249 struct objfile
*objfile
= cu
->objfile
;
11250 struct die_info
*child_die
= die
->child
;
11253 type
= get_die_type (die
, cu
);
11255 type
= read_structure_type (die
, cu
);
11257 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11259 struct field_info fi
;
11260 struct die_info
*child_die
;
11261 VEC (symbolp
) *template_args
= NULL
;
11262 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11264 memset (&fi
, 0, sizeof (struct field_info
));
11266 child_die
= die
->child
;
11268 while (child_die
&& child_die
->tag
)
11270 if (child_die
->tag
== DW_TAG_member
11271 || child_die
->tag
== DW_TAG_variable
)
11273 /* NOTE: carlton/2002-11-05: A C++ static data member
11274 should be a DW_TAG_member that is a declaration, but
11275 all versions of G++ as of this writing (so through at
11276 least 3.2.1) incorrectly generate DW_TAG_variable
11277 tags for them instead. */
11278 dwarf2_add_field (&fi
, child_die
, cu
);
11280 else if (child_die
->tag
== DW_TAG_subprogram
)
11282 /* C++ member function. */
11283 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11285 else if (child_die
->tag
== DW_TAG_inheritance
)
11287 /* C++ base class field. */
11288 dwarf2_add_field (&fi
, child_die
, cu
);
11290 else if (child_die
->tag
== DW_TAG_typedef
)
11291 dwarf2_add_typedef (&fi
, child_die
, cu
);
11292 else if (child_die
->tag
== DW_TAG_template_type_param
11293 || child_die
->tag
== DW_TAG_template_value_param
)
11295 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11298 VEC_safe_push (symbolp
, template_args
, arg
);
11301 child_die
= sibling_die (child_die
);
11304 /* Attach template arguments to type. */
11305 if (! VEC_empty (symbolp
, template_args
))
11307 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11308 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11309 = VEC_length (symbolp
, template_args
);
11310 TYPE_TEMPLATE_ARGUMENTS (type
)
11311 = obstack_alloc (&objfile
->objfile_obstack
,
11312 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11313 * sizeof (struct symbol
*)));
11314 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11315 VEC_address (symbolp
, template_args
),
11316 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11317 * sizeof (struct symbol
*)));
11318 VEC_free (symbolp
, template_args
);
11321 /* Attach fields and member functions to the type. */
11323 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11326 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11328 /* Get the type which refers to the base class (possibly this
11329 class itself) which contains the vtable pointer for the current
11330 class from the DW_AT_containing_type attribute. This use of
11331 DW_AT_containing_type is a GNU extension. */
11333 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11335 struct type
*t
= die_containing_type (die
, cu
);
11337 TYPE_VPTR_BASETYPE (type
) = t
;
11342 /* Our own class provides vtbl ptr. */
11343 for (i
= TYPE_NFIELDS (t
) - 1;
11344 i
>= TYPE_N_BASECLASSES (t
);
11347 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11349 if (is_vtable_name (fieldname
, cu
))
11351 TYPE_VPTR_FIELDNO (type
) = i
;
11356 /* Complain if virtual function table field not found. */
11357 if (i
< TYPE_N_BASECLASSES (t
))
11358 complaint (&symfile_complaints
,
11359 _("virtual function table pointer "
11360 "not found when defining class '%s'"),
11361 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11366 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11369 else if (cu
->producer
11370 && strncmp (cu
->producer
,
11371 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11373 /* The IBM XLC compiler does not provide direct indication
11374 of the containing type, but the vtable pointer is
11375 always named __vfp. */
11379 for (i
= TYPE_NFIELDS (type
) - 1;
11380 i
>= TYPE_N_BASECLASSES (type
);
11383 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11385 TYPE_VPTR_FIELDNO (type
) = i
;
11386 TYPE_VPTR_BASETYPE (type
) = type
;
11393 /* Copy fi.typedef_field_list linked list elements content into the
11394 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11395 if (fi
.typedef_field_list
)
11397 int i
= fi
.typedef_field_list_count
;
11399 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11400 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11401 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11402 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11404 /* Reverse the list order to keep the debug info elements order. */
11407 struct typedef_field
*dest
, *src
;
11409 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11410 src
= &fi
.typedef_field_list
->field
;
11411 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11416 do_cleanups (back_to
);
11418 if (HAVE_CPLUS_STRUCT (type
))
11419 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11422 quirk_gcc_member_function_pointer (type
, objfile
);
11424 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11425 snapshots) has been known to create a die giving a declaration
11426 for a class that has, as a child, a die giving a definition for a
11427 nested class. So we have to process our children even if the
11428 current die is a declaration. Normally, of course, a declaration
11429 won't have any children at all. */
11431 while (child_die
!= NULL
&& child_die
->tag
)
11433 if (child_die
->tag
== DW_TAG_member
11434 || child_die
->tag
== DW_TAG_variable
11435 || child_die
->tag
== DW_TAG_inheritance
11436 || child_die
->tag
== DW_TAG_template_value_param
11437 || child_die
->tag
== DW_TAG_template_type_param
)
11442 process_die (child_die
, cu
);
11444 child_die
= sibling_die (child_die
);
11447 /* Do not consider external references. According to the DWARF standard,
11448 these DIEs are identified by the fact that they have no byte_size
11449 attribute, and a declaration attribute. */
11450 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11451 || !die_is_declaration (die
, cu
))
11452 new_symbol (die
, type
, cu
);
11455 /* Given a DW_AT_enumeration_type die, set its type. We do not
11456 complete the type's fields yet, or create any symbols. */
11458 static struct type
*
11459 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11461 struct objfile
*objfile
= cu
->objfile
;
11463 struct attribute
*attr
;
11466 /* If the definition of this type lives in .debug_types, read that type.
11467 Don't follow DW_AT_specification though, that will take us back up
11468 the chain and we want to go down. */
11469 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11472 struct dwarf2_cu
*type_cu
= cu
;
11473 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11475 type
= read_type_die (type_die
, type_cu
);
11477 /* TYPE_CU may not be the same as CU.
11478 Ensure TYPE is recorded in CU's type_hash table. */
11479 return set_die_type (die
, type
, cu
);
11482 type
= alloc_type (objfile
);
11484 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11485 name
= dwarf2_full_name (NULL
, die
, cu
);
11487 TYPE_TAG_NAME (type
) = (char *) name
;
11489 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11492 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11496 TYPE_LENGTH (type
) = 0;
11499 /* The enumeration DIE can be incomplete. In Ada, any type can be
11500 declared as private in the package spec, and then defined only
11501 inside the package body. Such types are known as Taft Amendment
11502 Types. When another package uses such a type, an incomplete DIE
11503 may be generated by the compiler. */
11504 if (die_is_declaration (die
, cu
))
11505 TYPE_STUB (type
) = 1;
11507 return set_die_type (die
, type
, cu
);
11510 /* Given a pointer to a die which begins an enumeration, process all
11511 the dies that define the members of the enumeration, and create the
11512 symbol for the enumeration type.
11514 NOTE: We reverse the order of the element list. */
11517 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11519 struct type
*this_type
;
11521 this_type
= get_die_type (die
, cu
);
11522 if (this_type
== NULL
)
11523 this_type
= read_enumeration_type (die
, cu
);
11525 if (die
->child
!= NULL
)
11527 struct die_info
*child_die
;
11528 struct symbol
*sym
;
11529 struct field
*fields
= NULL
;
11530 int num_fields
= 0;
11531 int unsigned_enum
= 1;
11536 child_die
= die
->child
;
11537 while (child_die
&& child_die
->tag
)
11539 if (child_die
->tag
!= DW_TAG_enumerator
)
11541 process_die (child_die
, cu
);
11545 name
= dwarf2_name (child_die
, cu
);
11548 sym
= new_symbol (child_die
, this_type
, cu
);
11549 if (SYMBOL_VALUE (sym
) < 0)
11554 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11557 mask
|= SYMBOL_VALUE (sym
);
11559 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11561 fields
= (struct field
*)
11563 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11564 * sizeof (struct field
));
11567 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11568 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11569 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11570 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11576 child_die
= sibling_die (child_die
);
11581 TYPE_NFIELDS (this_type
) = num_fields
;
11582 TYPE_FIELDS (this_type
) = (struct field
*)
11583 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11584 memcpy (TYPE_FIELDS (this_type
), fields
,
11585 sizeof (struct field
) * num_fields
);
11589 TYPE_UNSIGNED (this_type
) = 1;
11591 TYPE_FLAG_ENUM (this_type
) = 1;
11594 /* If we are reading an enum from a .debug_types unit, and the enum
11595 is a declaration, and the enum is not the signatured type in the
11596 unit, then we do not want to add a symbol for it. Adding a
11597 symbol would in some cases obscure the true definition of the
11598 enum, giving users an incomplete type when the definition is
11599 actually available. Note that we do not want to do this for all
11600 enums which are just declarations, because C++0x allows forward
11601 enum declarations. */
11602 if (cu
->per_cu
->is_debug_types
11603 && die_is_declaration (die
, cu
))
11605 struct signatured_type
*sig_type
;
11608 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
11609 cu
->per_cu
->info_or_types_section
,
11610 cu
->per_cu
->offset
);
11611 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11612 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11616 new_symbol (die
, this_type
, cu
);
11619 /* Extract all information from a DW_TAG_array_type DIE and put it in
11620 the DIE's type field. For now, this only handles one dimensional
11623 static struct type
*
11624 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11626 struct objfile
*objfile
= cu
->objfile
;
11627 struct die_info
*child_die
;
11629 struct type
*element_type
, *range_type
, *index_type
;
11630 struct type
**range_types
= NULL
;
11631 struct attribute
*attr
;
11633 struct cleanup
*back_to
;
11636 element_type
= die_type (die
, cu
);
11638 /* The die_type call above may have already set the type for this DIE. */
11639 type
= get_die_type (die
, cu
);
11643 /* Irix 6.2 native cc creates array types without children for
11644 arrays with unspecified length. */
11645 if (die
->child
== NULL
)
11647 index_type
= objfile_type (objfile
)->builtin_int
;
11648 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11649 type
= create_array_type (NULL
, element_type
, range_type
);
11650 return set_die_type (die
, type
, cu
);
11653 back_to
= make_cleanup (null_cleanup
, NULL
);
11654 child_die
= die
->child
;
11655 while (child_die
&& child_die
->tag
)
11657 if (child_die
->tag
== DW_TAG_subrange_type
)
11659 struct type
*child_type
= read_type_die (child_die
, cu
);
11661 if (child_type
!= NULL
)
11663 /* The range type was succesfully read. Save it for the
11664 array type creation. */
11665 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11667 range_types
= (struct type
**)
11668 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11669 * sizeof (struct type
*));
11671 make_cleanup (free_current_contents
, &range_types
);
11673 range_types
[ndim
++] = child_type
;
11676 child_die
= sibling_die (child_die
);
11679 /* Dwarf2 dimensions are output from left to right, create the
11680 necessary array types in backwards order. */
11682 type
= element_type
;
11684 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11689 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11694 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11697 /* Understand Dwarf2 support for vector types (like they occur on
11698 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11699 array type. This is not part of the Dwarf2/3 standard yet, but a
11700 custom vendor extension. The main difference between a regular
11701 array and the vector variant is that vectors are passed by value
11703 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11705 make_vector_type (type
);
11707 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11708 implementation may choose to implement triple vectors using this
11710 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11713 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11714 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11716 complaint (&symfile_complaints
,
11717 _("DW_AT_byte_size for array type smaller "
11718 "than the total size of elements"));
11721 name
= dwarf2_name (die
, cu
);
11723 TYPE_NAME (type
) = name
;
11725 /* Install the type in the die. */
11726 set_die_type (die
, type
, cu
);
11728 /* set_die_type should be already done. */
11729 set_descriptive_type (type
, die
, cu
);
11731 do_cleanups (back_to
);
11736 static enum dwarf_array_dim_ordering
11737 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11739 struct attribute
*attr
;
11741 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11743 if (attr
) return DW_SND (attr
);
11745 /* GNU F77 is a special case, as at 08/2004 array type info is the
11746 opposite order to the dwarf2 specification, but data is still
11747 laid out as per normal fortran.
11749 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11750 version checking. */
11752 if (cu
->language
== language_fortran
11753 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11755 return DW_ORD_row_major
;
11758 switch (cu
->language_defn
->la_array_ordering
)
11760 case array_column_major
:
11761 return DW_ORD_col_major
;
11762 case array_row_major
:
11764 return DW_ORD_row_major
;
11768 /* Extract all information from a DW_TAG_set_type DIE and put it in
11769 the DIE's type field. */
11771 static struct type
*
11772 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11774 struct type
*domain_type
, *set_type
;
11775 struct attribute
*attr
;
11777 domain_type
= die_type (die
, cu
);
11779 /* The die_type call above may have already set the type for this DIE. */
11780 set_type
= get_die_type (die
, cu
);
11784 set_type
= create_set_type (NULL
, domain_type
);
11786 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11788 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11790 return set_die_type (die
, set_type
, cu
);
11793 /* A helper for read_common_block that creates a locexpr baton.
11794 SYM is the symbol which we are marking as computed.
11795 COMMON_DIE is the DIE for the common block.
11796 COMMON_LOC is the location expression attribute for the common
11798 MEMBER_LOC is the location expression attribute for the particular
11799 member of the common block that we are processing.
11800 CU is the CU from which the above come. */
11803 mark_common_block_symbol_computed (struct symbol
*sym
,
11804 struct die_info
*common_die
,
11805 struct attribute
*common_loc
,
11806 struct attribute
*member_loc
,
11807 struct dwarf2_cu
*cu
)
11809 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11810 struct dwarf2_locexpr_baton
*baton
;
11812 unsigned int cu_off
;
11813 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
11814 LONGEST offset
= 0;
11816 gdb_assert (common_loc
&& member_loc
);
11817 gdb_assert (attr_form_is_block (common_loc
));
11818 gdb_assert (attr_form_is_block (member_loc
)
11819 || attr_form_is_constant (member_loc
));
11821 baton
= obstack_alloc (&objfile
->objfile_obstack
,
11822 sizeof (struct dwarf2_locexpr_baton
));
11823 baton
->per_cu
= cu
->per_cu
;
11824 gdb_assert (baton
->per_cu
);
11826 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11828 if (attr_form_is_constant (member_loc
))
11830 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
11831 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
11834 baton
->size
+= DW_BLOCK (member_loc
)->size
;
11836 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
11839 *ptr
++ = DW_OP_call4
;
11840 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
11841 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
11844 if (attr_form_is_constant (member_loc
))
11846 *ptr
++ = DW_OP_addr
;
11847 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
11848 ptr
+= cu
->header
.addr_size
;
11852 /* We have to copy the data here, because DW_OP_call4 will only
11853 use a DW_AT_location attribute. */
11854 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
11855 ptr
+= DW_BLOCK (member_loc
)->size
;
11858 *ptr
++ = DW_OP_plus
;
11859 gdb_assert (ptr
- baton
->data
== baton
->size
);
11861 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11862 SYMBOL_LOCATION_BATON (sym
) = baton
;
11863 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11866 /* Create appropriate locally-scoped variables for all the
11867 DW_TAG_common_block entries. Also create a struct common_block
11868 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11869 is used to sepate the common blocks name namespace from regular
11873 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11875 struct attribute
*attr
;
11877 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11880 /* Support the .debug_loc offsets. */
11881 if (attr_form_is_block (attr
))
11885 else if (attr_form_is_section_offset (attr
))
11887 dwarf2_complex_location_expr_complaint ();
11892 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11893 "common block member");
11898 if (die
->child
!= NULL
)
11900 struct objfile
*objfile
= cu
->objfile
;
11901 struct die_info
*child_die
;
11902 size_t n_entries
= 0, size
;
11903 struct common_block
*common_block
;
11904 struct symbol
*sym
;
11906 for (child_die
= die
->child
;
11907 child_die
&& child_die
->tag
;
11908 child_die
= sibling_die (child_die
))
11911 size
= (sizeof (struct common_block
)
11912 + (n_entries
- 1) * sizeof (struct symbol
*));
11913 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
11914 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
11915 common_block
->n_entries
= 0;
11917 for (child_die
= die
->child
;
11918 child_die
&& child_die
->tag
;
11919 child_die
= sibling_die (child_die
))
11921 /* Create the symbol in the DW_TAG_common_block block in the current
11923 sym
= new_symbol (child_die
, NULL
, cu
);
11926 struct attribute
*member_loc
;
11928 common_block
->contents
[common_block
->n_entries
++] = sym
;
11930 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
11934 /* GDB has handled this for a long time, but it is
11935 not specified by DWARF. It seems to have been
11936 emitted by gfortran at least as recently as:
11937 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
11938 complaint (&symfile_complaints
,
11939 _("Variable in common block has "
11940 "DW_AT_data_member_location "
11941 "- DIE at 0x%x [in module %s]"),
11942 child_die
->offset
.sect_off
, cu
->objfile
->name
);
11944 if (attr_form_is_section_offset (member_loc
))
11945 dwarf2_complex_location_expr_complaint ();
11946 else if (attr_form_is_constant (member_loc
)
11947 || attr_form_is_block (member_loc
))
11950 mark_common_block_symbol_computed (sym
, die
, attr
,
11954 dwarf2_complex_location_expr_complaint ();
11959 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
11960 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
11964 /* Create a type for a C++ namespace. */
11966 static struct type
*
11967 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11969 struct objfile
*objfile
= cu
->objfile
;
11970 const char *previous_prefix
, *name
;
11974 /* For extensions, reuse the type of the original namespace. */
11975 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
11977 struct die_info
*ext_die
;
11978 struct dwarf2_cu
*ext_cu
= cu
;
11980 ext_die
= dwarf2_extension (die
, &ext_cu
);
11981 type
= read_type_die (ext_die
, ext_cu
);
11983 /* EXT_CU may not be the same as CU.
11984 Ensure TYPE is recorded in CU's type_hash table. */
11985 return set_die_type (die
, type
, cu
);
11988 name
= namespace_name (die
, &is_anonymous
, cu
);
11990 /* Now build the name of the current namespace. */
11992 previous_prefix
= determine_prefix (die
, cu
);
11993 if (previous_prefix
[0] != '\0')
11994 name
= typename_concat (&objfile
->objfile_obstack
,
11995 previous_prefix
, name
, 0, cu
);
11997 /* Create the type. */
11998 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12000 TYPE_NAME (type
) = (char *) name
;
12001 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12003 return set_die_type (die
, type
, cu
);
12006 /* Read a C++ namespace. */
12009 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12011 struct objfile
*objfile
= cu
->objfile
;
12014 /* Add a symbol associated to this if we haven't seen the namespace
12015 before. Also, add a using directive if it's an anonymous
12018 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12022 type
= read_type_die (die
, cu
);
12023 new_symbol (die
, type
, cu
);
12025 namespace_name (die
, &is_anonymous
, cu
);
12028 const char *previous_prefix
= determine_prefix (die
, cu
);
12030 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12031 NULL
, NULL
, &objfile
->objfile_obstack
);
12035 if (die
->child
!= NULL
)
12037 struct die_info
*child_die
= die
->child
;
12039 while (child_die
&& child_die
->tag
)
12041 process_die (child_die
, cu
);
12042 child_die
= sibling_die (child_die
);
12047 /* Read a Fortran module as type. This DIE can be only a declaration used for
12048 imported module. Still we need that type as local Fortran "use ... only"
12049 declaration imports depend on the created type in determine_prefix. */
12051 static struct type
*
12052 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12054 struct objfile
*objfile
= cu
->objfile
;
12058 module_name
= dwarf2_name (die
, cu
);
12060 complaint (&symfile_complaints
,
12061 _("DW_TAG_module has no name, offset 0x%x"),
12062 die
->offset
.sect_off
);
12063 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12065 /* determine_prefix uses TYPE_TAG_NAME. */
12066 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12068 return set_die_type (die
, type
, cu
);
12071 /* Read a Fortran module. */
12074 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12076 struct die_info
*child_die
= die
->child
;
12078 while (child_die
&& child_die
->tag
)
12080 process_die (child_die
, cu
);
12081 child_die
= sibling_die (child_die
);
12085 /* Return the name of the namespace represented by DIE. Set
12086 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12089 static const char *
12090 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12092 struct die_info
*current_die
;
12093 const char *name
= NULL
;
12095 /* Loop through the extensions until we find a name. */
12097 for (current_die
= die
;
12098 current_die
!= NULL
;
12099 current_die
= dwarf2_extension (die
, &cu
))
12101 name
= dwarf2_name (current_die
, cu
);
12106 /* Is it an anonymous namespace? */
12108 *is_anonymous
= (name
== NULL
);
12110 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12115 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12116 the user defined type vector. */
12118 static struct type
*
12119 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12121 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12122 struct comp_unit_head
*cu_header
= &cu
->header
;
12124 struct attribute
*attr_byte_size
;
12125 struct attribute
*attr_address_class
;
12126 int byte_size
, addr_class
;
12127 struct type
*target_type
;
12129 target_type
= die_type (die
, cu
);
12131 /* The die_type call above may have already set the type for this DIE. */
12132 type
= get_die_type (die
, cu
);
12136 type
= lookup_pointer_type (target_type
);
12138 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12139 if (attr_byte_size
)
12140 byte_size
= DW_UNSND (attr_byte_size
);
12142 byte_size
= cu_header
->addr_size
;
12144 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12145 if (attr_address_class
)
12146 addr_class
= DW_UNSND (attr_address_class
);
12148 addr_class
= DW_ADDR_none
;
12150 /* If the pointer size or address class is different than the
12151 default, create a type variant marked as such and set the
12152 length accordingly. */
12153 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12155 if (gdbarch_address_class_type_flags_p (gdbarch
))
12159 type_flags
= gdbarch_address_class_type_flags
12160 (gdbarch
, byte_size
, addr_class
);
12161 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12163 type
= make_type_with_address_space (type
, type_flags
);
12165 else if (TYPE_LENGTH (type
) != byte_size
)
12167 complaint (&symfile_complaints
,
12168 _("invalid pointer size %d"), byte_size
);
12172 /* Should we also complain about unhandled address classes? */
12176 TYPE_LENGTH (type
) = byte_size
;
12177 return set_die_type (die
, type
, cu
);
12180 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12181 the user defined type vector. */
12183 static struct type
*
12184 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12187 struct type
*to_type
;
12188 struct type
*domain
;
12190 to_type
= die_type (die
, cu
);
12191 domain
= die_containing_type (die
, cu
);
12193 /* The calls above may have already set the type for this DIE. */
12194 type
= get_die_type (die
, cu
);
12198 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12199 type
= lookup_methodptr_type (to_type
);
12201 type
= lookup_memberptr_type (to_type
, domain
);
12203 return set_die_type (die
, type
, cu
);
12206 /* Extract all information from a DW_TAG_reference_type DIE and add to
12207 the user defined type vector. */
12209 static struct type
*
12210 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12212 struct comp_unit_head
*cu_header
= &cu
->header
;
12213 struct type
*type
, *target_type
;
12214 struct attribute
*attr
;
12216 target_type
= die_type (die
, cu
);
12218 /* The die_type call above may have already set the type for this DIE. */
12219 type
= get_die_type (die
, cu
);
12223 type
= lookup_reference_type (target_type
);
12224 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12227 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12231 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12233 return set_die_type (die
, type
, cu
);
12236 static struct type
*
12237 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12239 struct type
*base_type
, *cv_type
;
12241 base_type
= die_type (die
, cu
);
12243 /* The die_type call above may have already set the type for this DIE. */
12244 cv_type
= get_die_type (die
, cu
);
12248 /* In case the const qualifier is applied to an array type, the element type
12249 is so qualified, not the array type (section 6.7.3 of C99). */
12250 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12252 struct type
*el_type
, *inner_array
;
12254 base_type
= copy_type (base_type
);
12255 inner_array
= base_type
;
12257 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12259 TYPE_TARGET_TYPE (inner_array
) =
12260 copy_type (TYPE_TARGET_TYPE (inner_array
));
12261 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12264 el_type
= TYPE_TARGET_TYPE (inner_array
);
12265 TYPE_TARGET_TYPE (inner_array
) =
12266 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12268 return set_die_type (die
, base_type
, cu
);
12271 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12272 return set_die_type (die
, cv_type
, cu
);
12275 static struct type
*
12276 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12278 struct type
*base_type
, *cv_type
;
12280 base_type
= die_type (die
, cu
);
12282 /* The die_type call above may have already set the type for this DIE. */
12283 cv_type
= get_die_type (die
, cu
);
12287 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12288 return set_die_type (die
, cv_type
, cu
);
12291 /* Extract all information from a DW_TAG_string_type DIE and add to
12292 the user defined type vector. It isn't really a user defined type,
12293 but it behaves like one, with other DIE's using an AT_user_def_type
12294 attribute to reference it. */
12296 static struct type
*
12297 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12299 struct objfile
*objfile
= cu
->objfile
;
12300 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12301 struct type
*type
, *range_type
, *index_type
, *char_type
;
12302 struct attribute
*attr
;
12303 unsigned int length
;
12305 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12308 length
= DW_UNSND (attr
);
12312 /* Check for the DW_AT_byte_size attribute. */
12313 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12316 length
= DW_UNSND (attr
);
12324 index_type
= objfile_type (objfile
)->builtin_int
;
12325 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12326 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12327 type
= create_string_type (NULL
, char_type
, range_type
);
12329 return set_die_type (die
, type
, cu
);
12332 /* Handle DIES due to C code like:
12336 int (*funcp)(int a, long l);
12340 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12342 static struct type
*
12343 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12345 struct objfile
*objfile
= cu
->objfile
;
12346 struct type
*type
; /* Type that this function returns. */
12347 struct type
*ftype
; /* Function that returns above type. */
12348 struct attribute
*attr
;
12350 type
= die_type (die
, cu
);
12352 /* The die_type call above may have already set the type for this DIE. */
12353 ftype
= get_die_type (die
, cu
);
12357 ftype
= lookup_function_type (type
);
12359 /* All functions in C++, Pascal and Java have prototypes. */
12360 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12361 if ((attr
&& (DW_UNSND (attr
) != 0))
12362 || cu
->language
== language_cplus
12363 || cu
->language
== language_java
12364 || cu
->language
== language_pascal
)
12365 TYPE_PROTOTYPED (ftype
) = 1;
12366 else if (producer_is_realview (cu
->producer
))
12367 /* RealView does not emit DW_AT_prototyped. We can not
12368 distinguish prototyped and unprototyped functions; default to
12369 prototyped, since that is more common in modern code (and
12370 RealView warns about unprototyped functions). */
12371 TYPE_PROTOTYPED (ftype
) = 1;
12373 /* Store the calling convention in the type if it's available in
12374 the subroutine die. Otherwise set the calling convention to
12375 the default value DW_CC_normal. */
12376 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12378 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12379 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12380 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12382 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12384 /* We need to add the subroutine type to the die immediately so
12385 we don't infinitely recurse when dealing with parameters
12386 declared as the same subroutine type. */
12387 set_die_type (die
, ftype
, cu
);
12389 if (die
->child
!= NULL
)
12391 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12392 struct die_info
*child_die
;
12393 int nparams
, iparams
;
12395 /* Count the number of parameters.
12396 FIXME: GDB currently ignores vararg functions, but knows about
12397 vararg member functions. */
12399 child_die
= die
->child
;
12400 while (child_die
&& child_die
->tag
)
12402 if (child_die
->tag
== DW_TAG_formal_parameter
)
12404 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12405 TYPE_VARARGS (ftype
) = 1;
12406 child_die
= sibling_die (child_die
);
12409 /* Allocate storage for parameters and fill them in. */
12410 TYPE_NFIELDS (ftype
) = nparams
;
12411 TYPE_FIELDS (ftype
) = (struct field
*)
12412 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12414 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12415 even if we error out during the parameters reading below. */
12416 for (iparams
= 0; iparams
< nparams
; iparams
++)
12417 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12420 child_die
= die
->child
;
12421 while (child_die
&& child_die
->tag
)
12423 if (child_die
->tag
== DW_TAG_formal_parameter
)
12425 struct type
*arg_type
;
12427 /* DWARF version 2 has no clean way to discern C++
12428 static and non-static member functions. G++ helps
12429 GDB by marking the first parameter for non-static
12430 member functions (which is the this pointer) as
12431 artificial. We pass this information to
12432 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12434 DWARF version 3 added DW_AT_object_pointer, which GCC
12435 4.5 does not yet generate. */
12436 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12438 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12441 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12443 /* GCC/43521: In java, the formal parameter
12444 "this" is sometimes not marked with DW_AT_artificial. */
12445 if (cu
->language
== language_java
)
12447 const char *name
= dwarf2_name (child_die
, cu
);
12449 if (name
&& !strcmp (name
, "this"))
12450 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12453 arg_type
= die_type (child_die
, cu
);
12455 /* RealView does not mark THIS as const, which the testsuite
12456 expects. GCC marks THIS as const in method definitions,
12457 but not in the class specifications (GCC PR 43053). */
12458 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12459 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12462 struct dwarf2_cu
*arg_cu
= cu
;
12463 const char *name
= dwarf2_name (child_die
, cu
);
12465 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12468 /* If the compiler emits this, use it. */
12469 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12472 else if (name
&& strcmp (name
, "this") == 0)
12473 /* Function definitions will have the argument names. */
12475 else if (name
== NULL
&& iparams
== 0)
12476 /* Declarations may not have the names, so like
12477 elsewhere in GDB, assume an artificial first
12478 argument is "this". */
12482 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12486 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12489 child_die
= sibling_die (child_die
);
12496 static struct type
*
12497 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12499 struct objfile
*objfile
= cu
->objfile
;
12500 const char *name
= NULL
;
12501 struct type
*this_type
, *target_type
;
12503 name
= dwarf2_full_name (NULL
, die
, cu
);
12504 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12505 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12506 TYPE_NAME (this_type
) = (char *) name
;
12507 set_die_type (die
, this_type
, cu
);
12508 target_type
= die_type (die
, cu
);
12509 if (target_type
!= this_type
)
12510 TYPE_TARGET_TYPE (this_type
) = target_type
;
12513 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12514 spec and cause infinite loops in GDB. */
12515 complaint (&symfile_complaints
,
12516 _("Self-referential DW_TAG_typedef "
12517 "- DIE at 0x%x [in module %s]"),
12518 die
->offset
.sect_off
, objfile
->name
);
12519 TYPE_TARGET_TYPE (this_type
) = NULL
;
12524 /* Find a representation of a given base type and install
12525 it in the TYPE field of the die. */
12527 static struct type
*
12528 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12530 struct objfile
*objfile
= cu
->objfile
;
12532 struct attribute
*attr
;
12533 int encoding
= 0, size
= 0;
12535 enum type_code code
= TYPE_CODE_INT
;
12536 int type_flags
= 0;
12537 struct type
*target_type
= NULL
;
12539 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12542 encoding
= DW_UNSND (attr
);
12544 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12547 size
= DW_UNSND (attr
);
12549 name
= dwarf2_name (die
, cu
);
12552 complaint (&symfile_complaints
,
12553 _("DW_AT_name missing from DW_TAG_base_type"));
12558 case DW_ATE_address
:
12559 /* Turn DW_ATE_address into a void * pointer. */
12560 code
= TYPE_CODE_PTR
;
12561 type_flags
|= TYPE_FLAG_UNSIGNED
;
12562 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12564 case DW_ATE_boolean
:
12565 code
= TYPE_CODE_BOOL
;
12566 type_flags
|= TYPE_FLAG_UNSIGNED
;
12568 case DW_ATE_complex_float
:
12569 code
= TYPE_CODE_COMPLEX
;
12570 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12572 case DW_ATE_decimal_float
:
12573 code
= TYPE_CODE_DECFLOAT
;
12576 code
= TYPE_CODE_FLT
;
12578 case DW_ATE_signed
:
12580 case DW_ATE_unsigned
:
12581 type_flags
|= TYPE_FLAG_UNSIGNED
;
12582 if (cu
->language
== language_fortran
12584 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12585 code
= TYPE_CODE_CHAR
;
12587 case DW_ATE_signed_char
:
12588 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12589 || cu
->language
== language_pascal
12590 || cu
->language
== language_fortran
)
12591 code
= TYPE_CODE_CHAR
;
12593 case DW_ATE_unsigned_char
:
12594 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12595 || cu
->language
== language_pascal
12596 || cu
->language
== language_fortran
)
12597 code
= TYPE_CODE_CHAR
;
12598 type_flags
|= TYPE_FLAG_UNSIGNED
;
12601 /* We just treat this as an integer and then recognize the
12602 type by name elsewhere. */
12606 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12607 dwarf_type_encoding_name (encoding
));
12611 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12612 TYPE_NAME (type
) = name
;
12613 TYPE_TARGET_TYPE (type
) = target_type
;
12615 if (name
&& strcmp (name
, "char") == 0)
12616 TYPE_NOSIGN (type
) = 1;
12618 return set_die_type (die
, type
, cu
);
12621 /* Read the given DW_AT_subrange DIE. */
12623 static struct type
*
12624 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12626 struct type
*base_type
;
12627 struct type
*range_type
;
12628 struct attribute
*attr
;
12630 int low_default_is_valid
;
12632 LONGEST negative_mask
;
12634 base_type
= die_type (die
, cu
);
12635 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
12636 check_typedef (base_type
);
12638 /* The die_type call above may have already set the type for this DIE. */
12639 range_type
= get_die_type (die
, cu
);
12643 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12644 omitting DW_AT_lower_bound. */
12645 switch (cu
->language
)
12648 case language_cplus
:
12650 low_default_is_valid
= 1;
12652 case language_fortran
:
12654 low_default_is_valid
= 1;
12657 case language_java
:
12658 case language_objc
:
12660 low_default_is_valid
= (cu
->header
.version
>= 4);
12664 case language_pascal
:
12666 low_default_is_valid
= (cu
->header
.version
>= 4);
12670 low_default_is_valid
= 0;
12674 /* FIXME: For variable sized arrays either of these could be
12675 a variable rather than a constant value. We'll allow it,
12676 but we don't know how to handle it. */
12677 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12679 low
= dwarf2_get_attr_constant_value (attr
, low
);
12680 else if (!low_default_is_valid
)
12681 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12682 "- DIE at 0x%x [in module %s]"),
12683 die
->offset
.sect_off
, cu
->objfile
->name
);
12685 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12688 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12690 /* GCC encodes arrays with unspecified or dynamic length
12691 with a DW_FORM_block1 attribute or a reference attribute.
12692 FIXME: GDB does not yet know how to handle dynamic
12693 arrays properly, treat them as arrays with unspecified
12696 FIXME: jimb/2003-09-22: GDB does not really know
12697 how to handle arrays of unspecified length
12698 either; we just represent them as zero-length
12699 arrays. Choose an appropriate upper bound given
12700 the lower bound we've computed above. */
12704 high
= dwarf2_get_attr_constant_value (attr
, 1);
12708 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12711 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12712 high
= low
+ count
- 1;
12716 /* Unspecified array length. */
12721 /* Dwarf-2 specifications explicitly allows to create subrange types
12722 without specifying a base type.
12723 In that case, the base type must be set to the type of
12724 the lower bound, upper bound or count, in that order, if any of these
12725 three attributes references an object that has a type.
12726 If no base type is found, the Dwarf-2 specifications say that
12727 a signed integer type of size equal to the size of an address should
12729 For the following C code: `extern char gdb_int [];'
12730 GCC produces an empty range DIE.
12731 FIXME: muller/2010-05-28: Possible references to object for low bound,
12732 high bound or count are not yet handled by this code. */
12733 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12735 struct objfile
*objfile
= cu
->objfile
;
12736 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12737 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12738 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12740 /* Test "int", "long int", and "long long int" objfile types,
12741 and select the first one having a size above or equal to the
12742 architecture address size. */
12743 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12744 base_type
= int_type
;
12747 int_type
= objfile_type (objfile
)->builtin_long
;
12748 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12749 base_type
= int_type
;
12752 int_type
= objfile_type (objfile
)->builtin_long_long
;
12753 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12754 base_type
= int_type
;
12760 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
12761 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
12762 low
|= negative_mask
;
12763 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
12764 high
|= negative_mask
;
12766 range_type
= create_range_type (NULL
, base_type
, low
, high
);
12768 /* Mark arrays with dynamic length at least as an array of unspecified
12769 length. GDB could check the boundary but before it gets implemented at
12770 least allow accessing the array elements. */
12771 if (attr
&& attr_form_is_block (attr
))
12772 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12774 /* Ada expects an empty array on no boundary attributes. */
12775 if (attr
== NULL
&& cu
->language
!= language_ada
)
12776 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12778 name
= dwarf2_name (die
, cu
);
12780 TYPE_NAME (range_type
) = name
;
12782 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12784 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
12786 set_die_type (die
, range_type
, cu
);
12788 /* set_die_type should be already done. */
12789 set_descriptive_type (range_type
, die
, cu
);
12794 static struct type
*
12795 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12799 /* For now, we only support the C meaning of an unspecified type: void. */
12801 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
12802 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
12804 return set_die_type (die
, type
, cu
);
12807 /* Read a single die and all its descendents. Set the die's sibling
12808 field to NULL; set other fields in the die correctly, and set all
12809 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12810 location of the info_ptr after reading all of those dies. PARENT
12811 is the parent of the die in question. */
12813 static struct die_info
*
12814 read_die_and_children (const struct die_reader_specs
*reader
,
12815 gdb_byte
*info_ptr
,
12816 gdb_byte
**new_info_ptr
,
12817 struct die_info
*parent
)
12819 struct die_info
*die
;
12823 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
12826 *new_info_ptr
= cur_ptr
;
12829 store_in_ref_table (die
, reader
->cu
);
12832 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
12836 *new_info_ptr
= cur_ptr
;
12839 die
->sibling
= NULL
;
12840 die
->parent
= parent
;
12844 /* Read a die, all of its descendents, and all of its siblings; set
12845 all of the fields of all of the dies correctly. Arguments are as
12846 in read_die_and_children. */
12848 static struct die_info
*
12849 read_die_and_siblings (const struct die_reader_specs
*reader
,
12850 gdb_byte
*info_ptr
,
12851 gdb_byte
**new_info_ptr
,
12852 struct die_info
*parent
)
12854 struct die_info
*first_die
, *last_sibling
;
12857 cur_ptr
= info_ptr
;
12858 first_die
= last_sibling
= NULL
;
12862 struct die_info
*die
12863 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12867 *new_info_ptr
= cur_ptr
;
12874 last_sibling
->sibling
= die
;
12876 last_sibling
= die
;
12880 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12882 The caller is responsible for filling in the extra attributes
12883 and updating (*DIEP)->num_attrs.
12884 Set DIEP to point to a newly allocated die with its information,
12885 except for its child, sibling, and parent fields.
12886 Set HAS_CHILDREN to tell whether the die has children or not. */
12889 read_full_die_1 (const struct die_reader_specs
*reader
,
12890 struct die_info
**diep
, gdb_byte
*info_ptr
,
12891 int *has_children
, int num_extra_attrs
)
12893 unsigned int abbrev_number
, bytes_read
, i
;
12894 sect_offset offset
;
12895 struct abbrev_info
*abbrev
;
12896 struct die_info
*die
;
12897 struct dwarf2_cu
*cu
= reader
->cu
;
12898 bfd
*abfd
= reader
->abfd
;
12900 offset
.sect_off
= info_ptr
- reader
->buffer
;
12901 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12902 info_ptr
+= bytes_read
;
12903 if (!abbrev_number
)
12910 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
12912 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
12914 bfd_get_filename (abfd
));
12916 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
12917 die
->offset
= offset
;
12918 die
->tag
= abbrev
->tag
;
12919 die
->abbrev
= abbrev_number
;
12921 /* Make the result usable.
12922 The caller needs to update num_attrs after adding the extra
12924 die
->num_attrs
= abbrev
->num_attrs
;
12926 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12927 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
12931 *has_children
= abbrev
->has_children
;
12935 /* Read a die and all its attributes.
12936 Set DIEP to point to a newly allocated die with its information,
12937 except for its child, sibling, and parent fields.
12938 Set HAS_CHILDREN to tell whether the die has children or not. */
12941 read_full_die (const struct die_reader_specs
*reader
,
12942 struct die_info
**diep
, gdb_byte
*info_ptr
,
12945 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
12948 /* Abbreviation tables.
12950 In DWARF version 2, the description of the debugging information is
12951 stored in a separate .debug_abbrev section. Before we read any
12952 dies from a section we read in all abbreviations and install them
12953 in a hash table. */
12955 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
12957 static struct abbrev_info
*
12958 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
12960 struct abbrev_info
*abbrev
;
12962 abbrev
= (struct abbrev_info
*)
12963 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
12964 memset (abbrev
, 0, sizeof (struct abbrev_info
));
12968 /* Add an abbreviation to the table. */
12971 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
12972 unsigned int abbrev_number
,
12973 struct abbrev_info
*abbrev
)
12975 unsigned int hash_number
;
12977 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12978 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
12979 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
12982 /* Look up an abbrev in the table.
12983 Returns NULL if the abbrev is not found. */
12985 static struct abbrev_info
*
12986 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
12987 unsigned int abbrev_number
)
12989 unsigned int hash_number
;
12990 struct abbrev_info
*abbrev
;
12992 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12993 abbrev
= abbrev_table
->abbrevs
[hash_number
];
12997 if (abbrev
->number
== abbrev_number
)
12999 abbrev
= abbrev
->next
;
13004 /* Read in an abbrev table. */
13006 static struct abbrev_table
*
13007 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13008 sect_offset offset
)
13010 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13011 bfd
*abfd
= section
->asection
->owner
;
13012 struct abbrev_table
*abbrev_table
;
13013 gdb_byte
*abbrev_ptr
;
13014 struct abbrev_info
*cur_abbrev
;
13015 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13016 unsigned int abbrev_form
;
13017 struct attr_abbrev
*cur_attrs
;
13018 unsigned int allocated_attrs
;
13020 abbrev_table
= XMALLOC (struct abbrev_table
);
13021 abbrev_table
->offset
= offset
;
13022 obstack_init (&abbrev_table
->abbrev_obstack
);
13023 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13025 * sizeof (struct abbrev_info
*)));
13026 memset (abbrev_table
->abbrevs
, 0,
13027 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13029 dwarf2_read_section (objfile
, section
);
13030 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13031 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13032 abbrev_ptr
+= bytes_read
;
13034 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13035 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13037 /* Loop until we reach an abbrev number of 0. */
13038 while (abbrev_number
)
13040 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13042 /* read in abbrev header */
13043 cur_abbrev
->number
= abbrev_number
;
13044 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13045 abbrev_ptr
+= bytes_read
;
13046 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13049 /* now read in declarations */
13050 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13051 abbrev_ptr
+= bytes_read
;
13052 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13053 abbrev_ptr
+= bytes_read
;
13054 while (abbrev_name
)
13056 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13058 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13060 = xrealloc (cur_attrs
, (allocated_attrs
13061 * sizeof (struct attr_abbrev
)));
13064 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13065 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13066 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13067 abbrev_ptr
+= bytes_read
;
13068 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13069 abbrev_ptr
+= bytes_read
;
13072 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13073 (cur_abbrev
->num_attrs
13074 * sizeof (struct attr_abbrev
)));
13075 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13076 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13078 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13080 /* Get next abbreviation.
13081 Under Irix6 the abbreviations for a compilation unit are not
13082 always properly terminated with an abbrev number of 0.
13083 Exit loop if we encounter an abbreviation which we have
13084 already read (which means we are about to read the abbreviations
13085 for the next compile unit) or if the end of the abbreviation
13086 table is reached. */
13087 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13089 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13090 abbrev_ptr
+= bytes_read
;
13091 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13096 return abbrev_table
;
13099 /* Free the resources held by ABBREV_TABLE. */
13102 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13104 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13105 xfree (abbrev_table
);
13108 /* Same as abbrev_table_free but as a cleanup.
13109 We pass in a pointer to the pointer to the table so that we can
13110 set the pointer to NULL when we're done. It also simplifies
13111 build_type_unit_groups. */
13114 abbrev_table_free_cleanup (void *table_ptr
)
13116 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13118 if (*abbrev_table_ptr
!= NULL
)
13119 abbrev_table_free (*abbrev_table_ptr
);
13120 *abbrev_table_ptr
= NULL
;
13123 /* Read the abbrev table for CU from ABBREV_SECTION. */
13126 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13127 struct dwarf2_section_info
*abbrev_section
)
13130 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13133 /* Release the memory used by the abbrev table for a compilation unit. */
13136 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13138 struct dwarf2_cu
*cu
= ptr_to_cu
;
13140 abbrev_table_free (cu
->abbrev_table
);
13141 /* Set this to NULL so that we SEGV if we try to read it later,
13142 and also because free_comp_unit verifies this is NULL. */
13143 cu
->abbrev_table
= NULL
;
13146 /* Returns nonzero if TAG represents a type that we might generate a partial
13150 is_type_tag_for_partial (int tag
)
13155 /* Some types that would be reasonable to generate partial symbols for,
13156 that we don't at present. */
13157 case DW_TAG_array_type
:
13158 case DW_TAG_file_type
:
13159 case DW_TAG_ptr_to_member_type
:
13160 case DW_TAG_set_type
:
13161 case DW_TAG_string_type
:
13162 case DW_TAG_subroutine_type
:
13164 case DW_TAG_base_type
:
13165 case DW_TAG_class_type
:
13166 case DW_TAG_interface_type
:
13167 case DW_TAG_enumeration_type
:
13168 case DW_TAG_structure_type
:
13169 case DW_TAG_subrange_type
:
13170 case DW_TAG_typedef
:
13171 case DW_TAG_union_type
:
13178 /* Load all DIEs that are interesting for partial symbols into memory. */
13180 static struct partial_die_info
*
13181 load_partial_dies (const struct die_reader_specs
*reader
,
13182 gdb_byte
*info_ptr
, int building_psymtab
)
13184 struct dwarf2_cu
*cu
= reader
->cu
;
13185 struct objfile
*objfile
= cu
->objfile
;
13186 struct partial_die_info
*part_die
;
13187 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13188 struct abbrev_info
*abbrev
;
13189 unsigned int bytes_read
;
13190 unsigned int load_all
= 0;
13191 int nesting_level
= 1;
13196 gdb_assert (cu
->per_cu
!= NULL
);
13197 if (cu
->per_cu
->load_all_dies
)
13201 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13205 &cu
->comp_unit_obstack
,
13206 hashtab_obstack_allocate
,
13207 dummy_obstack_deallocate
);
13209 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13210 sizeof (struct partial_die_info
));
13214 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13216 /* A NULL abbrev means the end of a series of children. */
13217 if (abbrev
== NULL
)
13219 if (--nesting_level
== 0)
13221 /* PART_DIE was probably the last thing allocated on the
13222 comp_unit_obstack, so we could call obstack_free
13223 here. We don't do that because the waste is small,
13224 and will be cleaned up when we're done with this
13225 compilation unit. This way, we're also more robust
13226 against other users of the comp_unit_obstack. */
13229 info_ptr
+= bytes_read
;
13230 last_die
= parent_die
;
13231 parent_die
= parent_die
->die_parent
;
13235 /* Check for template arguments. We never save these; if
13236 they're seen, we just mark the parent, and go on our way. */
13237 if (parent_die
!= NULL
13238 && cu
->language
== language_cplus
13239 && (abbrev
->tag
== DW_TAG_template_type_param
13240 || abbrev
->tag
== DW_TAG_template_value_param
))
13242 parent_die
->has_template_arguments
= 1;
13246 /* We don't need a partial DIE for the template argument. */
13247 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13252 /* We only recurse into c++ subprograms looking for template arguments.
13253 Skip their other children. */
13255 && cu
->language
== language_cplus
13256 && parent_die
!= NULL
13257 && parent_die
->tag
== DW_TAG_subprogram
)
13259 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13263 /* Check whether this DIE is interesting enough to save. Normally
13264 we would not be interested in members here, but there may be
13265 later variables referencing them via DW_AT_specification (for
13266 static members). */
13268 && !is_type_tag_for_partial (abbrev
->tag
)
13269 && abbrev
->tag
!= DW_TAG_constant
13270 && abbrev
->tag
!= DW_TAG_enumerator
13271 && abbrev
->tag
!= DW_TAG_subprogram
13272 && abbrev
->tag
!= DW_TAG_lexical_block
13273 && abbrev
->tag
!= DW_TAG_variable
13274 && abbrev
->tag
!= DW_TAG_namespace
13275 && abbrev
->tag
!= DW_TAG_module
13276 && abbrev
->tag
!= DW_TAG_member
13277 && abbrev
->tag
!= DW_TAG_imported_unit
)
13279 /* Otherwise we skip to the next sibling, if any. */
13280 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13284 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13287 /* This two-pass algorithm for processing partial symbols has a
13288 high cost in cache pressure. Thus, handle some simple cases
13289 here which cover the majority of C partial symbols. DIEs
13290 which neither have specification tags in them, nor could have
13291 specification tags elsewhere pointing at them, can simply be
13292 processed and discarded.
13294 This segment is also optional; scan_partial_symbols and
13295 add_partial_symbol will handle these DIEs if we chain
13296 them in normally. When compilers which do not emit large
13297 quantities of duplicate debug information are more common,
13298 this code can probably be removed. */
13300 /* Any complete simple types at the top level (pretty much all
13301 of them, for a language without namespaces), can be processed
13303 if (parent_die
== NULL
13304 && part_die
->has_specification
== 0
13305 && part_die
->is_declaration
== 0
13306 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13307 || part_die
->tag
== DW_TAG_base_type
13308 || part_die
->tag
== DW_TAG_subrange_type
))
13310 if (building_psymtab
&& part_die
->name
!= NULL
)
13311 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13312 VAR_DOMAIN
, LOC_TYPEDEF
,
13313 &objfile
->static_psymbols
,
13314 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13315 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13319 /* The exception for DW_TAG_typedef with has_children above is
13320 a workaround of GCC PR debug/47510. In the case of this complaint
13321 type_name_no_tag_or_error will error on such types later.
13323 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13324 it could not find the child DIEs referenced later, this is checked
13325 above. In correct DWARF DW_TAG_typedef should have no children. */
13327 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13328 complaint (&symfile_complaints
,
13329 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13330 "- DIE at 0x%x [in module %s]"),
13331 part_die
->offset
.sect_off
, objfile
->name
);
13333 /* If we're at the second level, and we're an enumerator, and
13334 our parent has no specification (meaning possibly lives in a
13335 namespace elsewhere), then we can add the partial symbol now
13336 instead of queueing it. */
13337 if (part_die
->tag
== DW_TAG_enumerator
13338 && parent_die
!= NULL
13339 && parent_die
->die_parent
== NULL
13340 && parent_die
->tag
== DW_TAG_enumeration_type
13341 && parent_die
->has_specification
== 0)
13343 if (part_die
->name
== NULL
)
13344 complaint (&symfile_complaints
,
13345 _("malformed enumerator DIE ignored"));
13346 else if (building_psymtab
)
13347 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13348 VAR_DOMAIN
, LOC_CONST
,
13349 (cu
->language
== language_cplus
13350 || cu
->language
== language_java
)
13351 ? &objfile
->global_psymbols
13352 : &objfile
->static_psymbols
,
13353 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13355 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13359 /* We'll save this DIE so link it in. */
13360 part_die
->die_parent
= parent_die
;
13361 part_die
->die_sibling
= NULL
;
13362 part_die
->die_child
= NULL
;
13364 if (last_die
&& last_die
== parent_die
)
13365 last_die
->die_child
= part_die
;
13367 last_die
->die_sibling
= part_die
;
13369 last_die
= part_die
;
13371 if (first_die
== NULL
)
13372 first_die
= part_die
;
13374 /* Maybe add the DIE to the hash table. Not all DIEs that we
13375 find interesting need to be in the hash table, because we
13376 also have the parent/sibling/child chains; only those that we
13377 might refer to by offset later during partial symbol reading.
13379 For now this means things that might have be the target of a
13380 DW_AT_specification, DW_AT_abstract_origin, or
13381 DW_AT_extension. DW_AT_extension will refer only to
13382 namespaces; DW_AT_abstract_origin refers to functions (and
13383 many things under the function DIE, but we do not recurse
13384 into function DIEs during partial symbol reading) and
13385 possibly variables as well; DW_AT_specification refers to
13386 declarations. Declarations ought to have the DW_AT_declaration
13387 flag. It happens that GCC forgets to put it in sometimes, but
13388 only for functions, not for types.
13390 Adding more things than necessary to the hash table is harmless
13391 except for the performance cost. Adding too few will result in
13392 wasted time in find_partial_die, when we reread the compilation
13393 unit with load_all_dies set. */
13396 || abbrev
->tag
== DW_TAG_constant
13397 || abbrev
->tag
== DW_TAG_subprogram
13398 || abbrev
->tag
== DW_TAG_variable
13399 || abbrev
->tag
== DW_TAG_namespace
13400 || part_die
->is_declaration
)
13404 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13405 part_die
->offset
.sect_off
, INSERT
);
13409 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13410 sizeof (struct partial_die_info
));
13412 /* For some DIEs we want to follow their children (if any). For C
13413 we have no reason to follow the children of structures; for other
13414 languages we have to, so that we can get at method physnames
13415 to infer fully qualified class names, for DW_AT_specification,
13416 and for C++ template arguments. For C++, we also look one level
13417 inside functions to find template arguments (if the name of the
13418 function does not already contain the template arguments).
13420 For Ada, we need to scan the children of subprograms and lexical
13421 blocks as well because Ada allows the definition of nested
13422 entities that could be interesting for the debugger, such as
13423 nested subprograms for instance. */
13424 if (last_die
->has_children
13426 || last_die
->tag
== DW_TAG_namespace
13427 || last_die
->tag
== DW_TAG_module
13428 || last_die
->tag
== DW_TAG_enumeration_type
13429 || (cu
->language
== language_cplus
13430 && last_die
->tag
== DW_TAG_subprogram
13431 && (last_die
->name
== NULL
13432 || strchr (last_die
->name
, '<') == NULL
))
13433 || (cu
->language
!= language_c
13434 && (last_die
->tag
== DW_TAG_class_type
13435 || last_die
->tag
== DW_TAG_interface_type
13436 || last_die
->tag
== DW_TAG_structure_type
13437 || last_die
->tag
== DW_TAG_union_type
))
13438 || (cu
->language
== language_ada
13439 && (last_die
->tag
== DW_TAG_subprogram
13440 || last_die
->tag
== DW_TAG_lexical_block
))))
13443 parent_die
= last_die
;
13447 /* Otherwise we skip to the next sibling, if any. */
13448 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13450 /* Back to the top, do it again. */
13454 /* Read a minimal amount of information into the minimal die structure. */
13457 read_partial_die (const struct die_reader_specs
*reader
,
13458 struct partial_die_info
*part_die
,
13459 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13460 gdb_byte
*info_ptr
)
13462 struct dwarf2_cu
*cu
= reader
->cu
;
13463 struct objfile
*objfile
= cu
->objfile
;
13464 gdb_byte
*buffer
= reader
->buffer
;
13466 struct attribute attr
;
13467 int has_low_pc_attr
= 0;
13468 int has_high_pc_attr
= 0;
13469 int high_pc_relative
= 0;
13471 memset (part_die
, 0, sizeof (struct partial_die_info
));
13473 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13475 info_ptr
+= abbrev_len
;
13477 if (abbrev
== NULL
)
13480 part_die
->tag
= abbrev
->tag
;
13481 part_die
->has_children
= abbrev
->has_children
;
13483 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13485 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13487 /* Store the data if it is of an attribute we want to keep in a
13488 partial symbol table. */
13492 switch (part_die
->tag
)
13494 case DW_TAG_compile_unit
:
13495 case DW_TAG_partial_unit
:
13496 case DW_TAG_type_unit
:
13497 /* Compilation units have a DW_AT_name that is a filename, not
13498 a source language identifier. */
13499 case DW_TAG_enumeration_type
:
13500 case DW_TAG_enumerator
:
13501 /* These tags always have simple identifiers already; no need
13502 to canonicalize them. */
13503 part_die
->name
= DW_STRING (&attr
);
13507 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13508 &objfile
->objfile_obstack
);
13512 case DW_AT_linkage_name
:
13513 case DW_AT_MIPS_linkage_name
:
13514 /* Note that both forms of linkage name might appear. We
13515 assume they will be the same, and we only store the last
13517 if (cu
->language
== language_ada
)
13518 part_die
->name
= DW_STRING (&attr
);
13519 part_die
->linkage_name
= DW_STRING (&attr
);
13522 has_low_pc_attr
= 1;
13523 part_die
->lowpc
= DW_ADDR (&attr
);
13525 case DW_AT_high_pc
:
13526 has_high_pc_attr
= 1;
13527 if (attr
.form
== DW_FORM_addr
13528 || attr
.form
== DW_FORM_GNU_addr_index
)
13529 part_die
->highpc
= DW_ADDR (&attr
);
13532 high_pc_relative
= 1;
13533 part_die
->highpc
= DW_UNSND (&attr
);
13536 case DW_AT_location
:
13537 /* Support the .debug_loc offsets. */
13538 if (attr_form_is_block (&attr
))
13540 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13542 else if (attr_form_is_section_offset (&attr
))
13544 dwarf2_complex_location_expr_complaint ();
13548 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13549 "partial symbol information");
13552 case DW_AT_external
:
13553 part_die
->is_external
= DW_UNSND (&attr
);
13555 case DW_AT_declaration
:
13556 part_die
->is_declaration
= DW_UNSND (&attr
);
13559 part_die
->has_type
= 1;
13561 case DW_AT_abstract_origin
:
13562 case DW_AT_specification
:
13563 case DW_AT_extension
:
13564 part_die
->has_specification
= 1;
13565 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13566 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13567 || cu
->per_cu
->is_dwz
);
13569 case DW_AT_sibling
:
13570 /* Ignore absolute siblings, they might point outside of
13571 the current compile unit. */
13572 if (attr
.form
== DW_FORM_ref_addr
)
13573 complaint (&symfile_complaints
,
13574 _("ignoring absolute DW_AT_sibling"));
13576 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13578 case DW_AT_byte_size
:
13579 part_die
->has_byte_size
= 1;
13581 case DW_AT_calling_convention
:
13582 /* DWARF doesn't provide a way to identify a program's source-level
13583 entry point. DW_AT_calling_convention attributes are only meant
13584 to describe functions' calling conventions.
13586 However, because it's a necessary piece of information in
13587 Fortran, and because DW_CC_program is the only piece of debugging
13588 information whose definition refers to a 'main program' at all,
13589 several compilers have begun marking Fortran main programs with
13590 DW_CC_program --- even when those functions use the standard
13591 calling conventions.
13593 So until DWARF specifies a way to provide this information and
13594 compilers pick up the new representation, we'll support this
13596 if (DW_UNSND (&attr
) == DW_CC_program
13597 && cu
->language
== language_fortran
)
13599 set_main_name (part_die
->name
);
13601 /* As this DIE has a static linkage the name would be difficult
13602 to look up later. */
13603 language_of_main
= language_fortran
;
13607 if (DW_UNSND (&attr
) == DW_INL_inlined
13608 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13609 part_die
->may_be_inlined
= 1;
13613 if (part_die
->tag
== DW_TAG_imported_unit
)
13615 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13616 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13617 || cu
->per_cu
->is_dwz
);
13626 if (high_pc_relative
)
13627 part_die
->highpc
+= part_die
->lowpc
;
13629 if (has_low_pc_attr
&& has_high_pc_attr
)
13631 /* When using the GNU linker, .gnu.linkonce. sections are used to
13632 eliminate duplicate copies of functions and vtables and such.
13633 The linker will arbitrarily choose one and discard the others.
13634 The AT_*_pc values for such functions refer to local labels in
13635 these sections. If the section from that file was discarded, the
13636 labels are not in the output, so the relocs get a value of 0.
13637 If this is a discarded function, mark the pc bounds as invalid,
13638 so that GDB will ignore it. */
13639 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13641 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13643 complaint (&symfile_complaints
,
13644 _("DW_AT_low_pc %s is zero "
13645 "for DIE at 0x%x [in module %s]"),
13646 paddress (gdbarch
, part_die
->lowpc
),
13647 part_die
->offset
.sect_off
, objfile
->name
);
13649 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13650 else if (part_die
->lowpc
>= part_die
->highpc
)
13652 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13654 complaint (&symfile_complaints
,
13655 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13656 "for DIE at 0x%x [in module %s]"),
13657 paddress (gdbarch
, part_die
->lowpc
),
13658 paddress (gdbarch
, part_die
->highpc
),
13659 part_die
->offset
.sect_off
, objfile
->name
);
13662 part_die
->has_pc_info
= 1;
13668 /* Find a cached partial DIE at OFFSET in CU. */
13670 static struct partial_die_info
*
13671 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13673 struct partial_die_info
*lookup_die
= NULL
;
13674 struct partial_die_info part_die
;
13676 part_die
.offset
= offset
;
13677 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13683 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13684 except in the case of .debug_types DIEs which do not reference
13685 outside their CU (they do however referencing other types via
13686 DW_FORM_ref_sig8). */
13688 static struct partial_die_info
*
13689 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13691 struct objfile
*objfile
= cu
->objfile
;
13692 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13693 struct partial_die_info
*pd
= NULL
;
13695 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13696 && offset_in_cu_p (&cu
->header
, offset
))
13698 pd
= find_partial_die_in_comp_unit (offset
, cu
);
13701 /* We missed recording what we needed.
13702 Load all dies and try again. */
13703 per_cu
= cu
->per_cu
;
13707 /* TUs don't reference other CUs/TUs (except via type signatures). */
13708 if (cu
->per_cu
->is_debug_types
)
13710 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13711 " external reference to offset 0x%lx [in module %s].\n"),
13712 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
13713 bfd_get_filename (objfile
->obfd
));
13715 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
13718 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
13719 load_partial_comp_unit (per_cu
);
13721 per_cu
->cu
->last_used
= 0;
13722 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13725 /* If we didn't find it, and not all dies have been loaded,
13726 load them all and try again. */
13728 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
13730 per_cu
->load_all_dies
= 1;
13732 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13733 THIS_CU->cu may already be in use. So we can't just free it and
13734 replace its DIEs with the ones we read in. Instead, we leave those
13735 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13736 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13738 load_partial_comp_unit (per_cu
);
13740 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13744 internal_error (__FILE__
, __LINE__
,
13745 _("could not find partial DIE 0x%x "
13746 "in cache [from module %s]\n"),
13747 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
13751 /* See if we can figure out if the class lives in a namespace. We do
13752 this by looking for a member function; its demangled name will
13753 contain namespace info, if there is any. */
13756 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
13757 struct dwarf2_cu
*cu
)
13759 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13760 what template types look like, because the demangler
13761 frequently doesn't give the same name as the debug info. We
13762 could fix this by only using the demangled name to get the
13763 prefix (but see comment in read_structure_type). */
13765 struct partial_die_info
*real_pdi
;
13766 struct partial_die_info
*child_pdi
;
13768 /* If this DIE (this DIE's specification, if any) has a parent, then
13769 we should not do this. We'll prepend the parent's fully qualified
13770 name when we create the partial symbol. */
13772 real_pdi
= struct_pdi
;
13773 while (real_pdi
->has_specification
)
13774 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
13775 real_pdi
->spec_is_dwz
, cu
);
13777 if (real_pdi
->die_parent
!= NULL
)
13780 for (child_pdi
= struct_pdi
->die_child
;
13782 child_pdi
= child_pdi
->die_sibling
)
13784 if (child_pdi
->tag
== DW_TAG_subprogram
13785 && child_pdi
->linkage_name
!= NULL
)
13787 char *actual_class_name
13788 = language_class_name_from_physname (cu
->language_defn
,
13789 child_pdi
->linkage_name
);
13790 if (actual_class_name
!= NULL
)
13793 = obsavestring (actual_class_name
,
13794 strlen (actual_class_name
),
13795 &cu
->objfile
->objfile_obstack
);
13796 xfree (actual_class_name
);
13803 /* Adjust PART_DIE before generating a symbol for it. This function
13804 may set the is_external flag or change the DIE's name. */
13807 fixup_partial_die (struct partial_die_info
*part_die
,
13808 struct dwarf2_cu
*cu
)
13810 /* Once we've fixed up a die, there's no point in doing so again.
13811 This also avoids a memory leak if we were to call
13812 guess_partial_die_structure_name multiple times. */
13813 if (part_die
->fixup_called
)
13816 /* If we found a reference attribute and the DIE has no name, try
13817 to find a name in the referred to DIE. */
13819 if (part_die
->name
== NULL
&& part_die
->has_specification
)
13821 struct partial_die_info
*spec_die
;
13823 spec_die
= find_partial_die (part_die
->spec_offset
,
13824 part_die
->spec_is_dwz
, cu
);
13826 fixup_partial_die (spec_die
, cu
);
13828 if (spec_die
->name
)
13830 part_die
->name
= spec_die
->name
;
13832 /* Copy DW_AT_external attribute if it is set. */
13833 if (spec_die
->is_external
)
13834 part_die
->is_external
= spec_die
->is_external
;
13838 /* Set default names for some unnamed DIEs. */
13840 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
13841 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
13843 /* If there is no parent die to provide a namespace, and there are
13844 children, see if we can determine the namespace from their linkage
13846 if (cu
->language
== language_cplus
13847 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
13848 && part_die
->die_parent
== NULL
13849 && part_die
->has_children
13850 && (part_die
->tag
== DW_TAG_class_type
13851 || part_die
->tag
== DW_TAG_structure_type
13852 || part_die
->tag
== DW_TAG_union_type
))
13853 guess_partial_die_structure_name (part_die
, cu
);
13855 /* GCC might emit a nameless struct or union that has a linkage
13856 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13857 if (part_die
->name
== NULL
13858 && (part_die
->tag
== DW_TAG_class_type
13859 || part_die
->tag
== DW_TAG_interface_type
13860 || part_die
->tag
== DW_TAG_structure_type
13861 || part_die
->tag
== DW_TAG_union_type
)
13862 && part_die
->linkage_name
!= NULL
)
13866 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13871 /* Strip any leading namespaces/classes, keep only the base name.
13872 DW_AT_name for named DIEs does not contain the prefixes. */
13873 base
= strrchr (demangled
, ':');
13874 if (base
&& base
> demangled
&& base
[-1] == ':')
13879 part_die
->name
= obsavestring (base
, strlen (base
),
13880 &cu
->objfile
->objfile_obstack
);
13885 part_die
->fixup_called
= 1;
13888 /* Read an attribute value described by an attribute form. */
13891 read_attribute_value (const struct die_reader_specs
*reader
,
13892 struct attribute
*attr
, unsigned form
,
13893 gdb_byte
*info_ptr
)
13895 struct dwarf2_cu
*cu
= reader
->cu
;
13896 bfd
*abfd
= reader
->abfd
;
13897 struct comp_unit_head
*cu_header
= &cu
->header
;
13898 unsigned int bytes_read
;
13899 struct dwarf_block
*blk
;
13904 case DW_FORM_ref_addr
:
13905 if (cu
->header
.version
== 2)
13906 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13908 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
13909 &cu
->header
, &bytes_read
);
13910 info_ptr
+= bytes_read
;
13912 case DW_FORM_GNU_ref_alt
:
13913 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13914 info_ptr
+= bytes_read
;
13917 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13918 info_ptr
+= bytes_read
;
13920 case DW_FORM_block2
:
13921 blk
= dwarf_alloc_block (cu
);
13922 blk
->size
= read_2_bytes (abfd
, info_ptr
);
13924 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13925 info_ptr
+= blk
->size
;
13926 DW_BLOCK (attr
) = blk
;
13928 case DW_FORM_block4
:
13929 blk
= dwarf_alloc_block (cu
);
13930 blk
->size
= read_4_bytes (abfd
, info_ptr
);
13932 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13933 info_ptr
+= blk
->size
;
13934 DW_BLOCK (attr
) = blk
;
13936 case DW_FORM_data2
:
13937 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
13940 case DW_FORM_data4
:
13941 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
13944 case DW_FORM_data8
:
13945 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
13948 case DW_FORM_sec_offset
:
13949 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13950 info_ptr
+= bytes_read
;
13952 case DW_FORM_string
:
13953 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
13954 DW_STRING_IS_CANONICAL (attr
) = 0;
13955 info_ptr
+= bytes_read
;
13958 if (!cu
->per_cu
->is_dwz
)
13960 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
13962 DW_STRING_IS_CANONICAL (attr
) = 0;
13963 info_ptr
+= bytes_read
;
13967 case DW_FORM_GNU_strp_alt
:
13969 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
13970 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
13973 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
13974 DW_STRING_IS_CANONICAL (attr
) = 0;
13975 info_ptr
+= bytes_read
;
13978 case DW_FORM_exprloc
:
13979 case DW_FORM_block
:
13980 blk
= dwarf_alloc_block (cu
);
13981 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13982 info_ptr
+= bytes_read
;
13983 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13984 info_ptr
+= blk
->size
;
13985 DW_BLOCK (attr
) = blk
;
13987 case DW_FORM_block1
:
13988 blk
= dwarf_alloc_block (cu
);
13989 blk
->size
= read_1_byte (abfd
, info_ptr
);
13991 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13992 info_ptr
+= blk
->size
;
13993 DW_BLOCK (attr
) = blk
;
13995 case DW_FORM_data1
:
13996 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14000 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14003 case DW_FORM_flag_present
:
14004 DW_UNSND (attr
) = 1;
14006 case DW_FORM_sdata
:
14007 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14008 info_ptr
+= bytes_read
;
14010 case DW_FORM_udata
:
14011 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14012 info_ptr
+= bytes_read
;
14015 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14016 + read_1_byte (abfd
, info_ptr
));
14020 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14021 + read_2_bytes (abfd
, info_ptr
));
14025 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14026 + read_4_bytes (abfd
, info_ptr
));
14030 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14031 + read_8_bytes (abfd
, info_ptr
));
14034 case DW_FORM_ref_sig8
:
14035 /* Convert the signature to something we can record in DW_UNSND
14037 NOTE: This is NULL if the type wasn't found. */
14038 DW_SIGNATURED_TYPE (attr
) =
14039 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
14042 case DW_FORM_ref_udata
:
14043 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14044 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14045 info_ptr
+= bytes_read
;
14047 case DW_FORM_indirect
:
14048 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14049 info_ptr
+= bytes_read
;
14050 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14052 case DW_FORM_GNU_addr_index
:
14053 if (reader
->dwo_file
== NULL
)
14055 /* For now flag a hard error.
14056 Later we can turn this into a complaint. */
14057 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14058 dwarf_form_name (form
),
14059 bfd_get_filename (abfd
));
14061 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14062 info_ptr
+= bytes_read
;
14064 case DW_FORM_GNU_str_index
:
14065 if (reader
->dwo_file
== NULL
)
14067 /* For now flag a hard error.
14068 Later we can turn this into a complaint if warranted. */
14069 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14070 dwarf_form_name (form
),
14071 bfd_get_filename (abfd
));
14074 ULONGEST str_index
=
14075 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14077 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14078 DW_STRING_IS_CANONICAL (attr
) = 0;
14079 info_ptr
+= bytes_read
;
14083 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14084 dwarf_form_name (form
),
14085 bfd_get_filename (abfd
));
14089 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14090 attr
->form
= DW_FORM_GNU_ref_alt
;
14092 /* We have seen instances where the compiler tried to emit a byte
14093 size attribute of -1 which ended up being encoded as an unsigned
14094 0xffffffff. Although 0xffffffff is technically a valid size value,
14095 an object of this size seems pretty unlikely so we can relatively
14096 safely treat these cases as if the size attribute was invalid and
14097 treat them as zero by default. */
14098 if (attr
->name
== DW_AT_byte_size
14099 && form
== DW_FORM_data4
14100 && DW_UNSND (attr
) >= 0xffffffff)
14103 (&symfile_complaints
,
14104 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14105 hex_string (DW_UNSND (attr
)));
14106 DW_UNSND (attr
) = 0;
14112 /* Read an attribute described by an abbreviated attribute. */
14115 read_attribute (const struct die_reader_specs
*reader
,
14116 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14117 gdb_byte
*info_ptr
)
14119 attr
->name
= abbrev
->name
;
14120 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14123 /* Read dwarf information from a buffer. */
14125 static unsigned int
14126 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14128 return bfd_get_8 (abfd
, buf
);
14132 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14134 return bfd_get_signed_8 (abfd
, buf
);
14137 static unsigned int
14138 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14140 return bfd_get_16 (abfd
, buf
);
14144 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14146 return bfd_get_signed_16 (abfd
, buf
);
14149 static unsigned int
14150 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14152 return bfd_get_32 (abfd
, buf
);
14156 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14158 return bfd_get_signed_32 (abfd
, buf
);
14162 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14164 return bfd_get_64 (abfd
, buf
);
14168 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14169 unsigned int *bytes_read
)
14171 struct comp_unit_head
*cu_header
= &cu
->header
;
14172 CORE_ADDR retval
= 0;
14174 if (cu_header
->signed_addr_p
)
14176 switch (cu_header
->addr_size
)
14179 retval
= bfd_get_signed_16 (abfd
, buf
);
14182 retval
= bfd_get_signed_32 (abfd
, buf
);
14185 retval
= bfd_get_signed_64 (abfd
, buf
);
14188 internal_error (__FILE__
, __LINE__
,
14189 _("read_address: bad switch, signed [in module %s]"),
14190 bfd_get_filename (abfd
));
14195 switch (cu_header
->addr_size
)
14198 retval
= bfd_get_16 (abfd
, buf
);
14201 retval
= bfd_get_32 (abfd
, buf
);
14204 retval
= bfd_get_64 (abfd
, buf
);
14207 internal_error (__FILE__
, __LINE__
,
14208 _("read_address: bad switch, "
14209 "unsigned [in module %s]"),
14210 bfd_get_filename (abfd
));
14214 *bytes_read
= cu_header
->addr_size
;
14218 /* Read the initial length from a section. The (draft) DWARF 3
14219 specification allows the initial length to take up either 4 bytes
14220 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14221 bytes describe the length and all offsets will be 8 bytes in length
14224 An older, non-standard 64-bit format is also handled by this
14225 function. The older format in question stores the initial length
14226 as an 8-byte quantity without an escape value. Lengths greater
14227 than 2^32 aren't very common which means that the initial 4 bytes
14228 is almost always zero. Since a length value of zero doesn't make
14229 sense for the 32-bit format, this initial zero can be considered to
14230 be an escape value which indicates the presence of the older 64-bit
14231 format. As written, the code can't detect (old format) lengths
14232 greater than 4GB. If it becomes necessary to handle lengths
14233 somewhat larger than 4GB, we could allow other small values (such
14234 as the non-sensical values of 1, 2, and 3) to also be used as
14235 escape values indicating the presence of the old format.
14237 The value returned via bytes_read should be used to increment the
14238 relevant pointer after calling read_initial_length().
14240 [ Note: read_initial_length() and read_offset() are based on the
14241 document entitled "DWARF Debugging Information Format", revision
14242 3, draft 8, dated November 19, 2001. This document was obtained
14245 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14247 This document is only a draft and is subject to change. (So beware.)
14249 Details regarding the older, non-standard 64-bit format were
14250 determined empirically by examining 64-bit ELF files produced by
14251 the SGI toolchain on an IRIX 6.5 machine.
14253 - Kevin, July 16, 2002
14257 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
14259 LONGEST length
= bfd_get_32 (abfd
, buf
);
14261 if (length
== 0xffffffff)
14263 length
= bfd_get_64 (abfd
, buf
+ 4);
14266 else if (length
== 0)
14268 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14269 length
= bfd_get_64 (abfd
, buf
);
14280 /* Cover function for read_initial_length.
14281 Returns the length of the object at BUF, and stores the size of the
14282 initial length in *BYTES_READ and stores the size that offsets will be in
14284 If the initial length size is not equivalent to that specified in
14285 CU_HEADER then issue a complaint.
14286 This is useful when reading non-comp-unit headers. */
14289 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
14290 const struct comp_unit_head
*cu_header
,
14291 unsigned int *bytes_read
,
14292 unsigned int *offset_size
)
14294 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14296 gdb_assert (cu_header
->initial_length_size
== 4
14297 || cu_header
->initial_length_size
== 8
14298 || cu_header
->initial_length_size
== 12);
14300 if (cu_header
->initial_length_size
!= *bytes_read
)
14301 complaint (&symfile_complaints
,
14302 _("intermixed 32-bit and 64-bit DWARF sections"));
14304 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14308 /* Read an offset from the data stream. The size of the offset is
14309 given by cu_header->offset_size. */
14312 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
14313 unsigned int *bytes_read
)
14315 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14317 *bytes_read
= cu_header
->offset_size
;
14321 /* Read an offset from the data stream. */
14324 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
14326 LONGEST retval
= 0;
14328 switch (offset_size
)
14331 retval
= bfd_get_32 (abfd
, buf
);
14334 retval
= bfd_get_64 (abfd
, buf
);
14337 internal_error (__FILE__
, __LINE__
,
14338 _("read_offset_1: bad switch [in module %s]"),
14339 bfd_get_filename (abfd
));
14346 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
14348 /* If the size of a host char is 8 bits, we can return a pointer
14349 to the buffer, otherwise we have to copy the data to a buffer
14350 allocated on the temporary obstack. */
14351 gdb_assert (HOST_CHAR_BIT
== 8);
14356 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14358 /* If the size of a host char is 8 bits, we can return a pointer
14359 to the string, otherwise we have to copy the string to a buffer
14360 allocated on the temporary obstack. */
14361 gdb_assert (HOST_CHAR_BIT
== 8);
14364 *bytes_read_ptr
= 1;
14367 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
14368 return (char *) buf
;
14372 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14374 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14375 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14376 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14377 bfd_get_filename (abfd
));
14378 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14379 error (_("DW_FORM_strp pointing outside of "
14380 ".debug_str section [in module %s]"),
14381 bfd_get_filename (abfd
));
14382 gdb_assert (HOST_CHAR_BIT
== 8);
14383 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14385 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14388 /* Read a string at offset STR_OFFSET in the .debug_str section from
14389 the .dwz file DWZ. Throw an error if the offset is too large. If
14390 the string consists of a single NUL byte, return NULL; otherwise
14391 return a pointer to the string. */
14394 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14396 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14398 if (dwz
->str
.buffer
== NULL
)
14399 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14400 "section [in module %s]"),
14401 bfd_get_filename (dwz
->dwz_bfd
));
14402 if (str_offset
>= dwz
->str
.size
)
14403 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14404 ".debug_str section [in module %s]"),
14405 bfd_get_filename (dwz
->dwz_bfd
));
14406 gdb_assert (HOST_CHAR_BIT
== 8);
14407 if (dwz
->str
.buffer
[str_offset
] == '\0')
14409 return (char *) (dwz
->str
.buffer
+ str_offset
);
14413 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
14414 const struct comp_unit_head
*cu_header
,
14415 unsigned int *bytes_read_ptr
)
14417 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14419 return read_indirect_string_at_offset (abfd
, str_offset
);
14423 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14426 unsigned int num_read
;
14428 unsigned char byte
;
14436 byte
= bfd_get_8 (abfd
, buf
);
14439 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14440 if ((byte
& 128) == 0)
14446 *bytes_read_ptr
= num_read
;
14451 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14454 int i
, shift
, num_read
;
14455 unsigned char byte
;
14463 byte
= bfd_get_8 (abfd
, buf
);
14466 result
|= ((LONGEST
) (byte
& 127) << shift
);
14468 if ((byte
& 128) == 0)
14473 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14474 result
|= -(((LONGEST
) 1) << shift
);
14475 *bytes_read_ptr
= num_read
;
14479 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14480 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14481 ADDR_SIZE is the size of addresses from the CU header. */
14484 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14486 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14487 bfd
*abfd
= objfile
->obfd
;
14488 const gdb_byte
*info_ptr
;
14490 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14491 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14492 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14494 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14495 error (_("DW_FORM_addr_index pointing outside of "
14496 ".debug_addr section [in module %s]"),
14498 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14499 + addr_base
+ addr_index
* addr_size
);
14500 if (addr_size
== 4)
14501 return bfd_get_32 (abfd
, info_ptr
);
14503 return bfd_get_64 (abfd
, info_ptr
);
14506 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14509 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14511 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14514 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14517 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
14518 unsigned int *bytes_read
)
14520 bfd
*abfd
= cu
->objfile
->obfd
;
14521 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14523 return read_addr_index (cu
, addr_index
);
14526 /* Data structure to pass results from dwarf2_read_addr_index_reader
14527 back to dwarf2_read_addr_index. */
14529 struct dwarf2_read_addr_index_data
14531 ULONGEST addr_base
;
14535 /* die_reader_func for dwarf2_read_addr_index. */
14538 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14539 gdb_byte
*info_ptr
,
14540 struct die_info
*comp_unit_die
,
14544 struct dwarf2_cu
*cu
= reader
->cu
;
14545 struct dwarf2_read_addr_index_data
*aidata
=
14546 (struct dwarf2_read_addr_index_data
*) data
;
14548 aidata
->addr_base
= cu
->addr_base
;
14549 aidata
->addr_size
= cu
->header
.addr_size
;
14552 /* Given an index in .debug_addr, fetch the value.
14553 NOTE: This can be called during dwarf expression evaluation,
14554 long after the debug information has been read, and thus per_cu->cu
14555 may no longer exist. */
14558 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14559 unsigned int addr_index
)
14561 struct objfile
*objfile
= per_cu
->objfile
;
14562 struct dwarf2_cu
*cu
= per_cu
->cu
;
14563 ULONGEST addr_base
;
14566 /* This is intended to be called from outside this file. */
14567 dw2_setup (objfile
);
14569 /* We need addr_base and addr_size.
14570 If we don't have PER_CU->cu, we have to get it.
14571 Nasty, but the alternative is storing the needed info in PER_CU,
14572 which at this point doesn't seem justified: it's not clear how frequently
14573 it would get used and it would increase the size of every PER_CU.
14574 Entry points like dwarf2_per_cu_addr_size do a similar thing
14575 so we're not in uncharted territory here.
14576 Alas we need to be a bit more complicated as addr_base is contained
14579 We don't need to read the entire CU(/TU).
14580 We just need the header and top level die.
14582 IWBN to use the aging mechanism to let us lazily later discard the CU.
14583 For now we skip this optimization. */
14587 addr_base
= cu
->addr_base
;
14588 addr_size
= cu
->header
.addr_size
;
14592 struct dwarf2_read_addr_index_data aidata
;
14594 /* Note: We can't use init_cutu_and_read_dies_simple here,
14595 we need addr_base. */
14596 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14597 dwarf2_read_addr_index_reader
, &aidata
);
14598 addr_base
= aidata
.addr_base
;
14599 addr_size
= aidata
.addr_size
;
14602 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14605 /* Given a DW_AT_str_index, fetch the string. */
14608 read_str_index (const struct die_reader_specs
*reader
,
14609 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14611 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14612 const char *dwo_name
= objfile
->name
;
14613 bfd
*abfd
= objfile
->obfd
;
14614 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14615 gdb_byte
*info_ptr
;
14616 ULONGEST str_offset
;
14618 dwarf2_read_section (objfile
, §ions
->str
);
14619 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14620 if (sections
->str
.buffer
== NULL
)
14621 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14622 " in CU at offset 0x%lx [in module %s]"),
14623 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14624 if (sections
->str_offsets
.buffer
== NULL
)
14625 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14626 " in CU at offset 0x%lx [in module %s]"),
14627 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14628 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14629 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14630 " section in CU at offset 0x%lx [in module %s]"),
14631 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14632 info_ptr
= (sections
->str_offsets
.buffer
14633 + str_index
* cu
->header
.offset_size
);
14634 if (cu
->header
.offset_size
== 4)
14635 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14637 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14638 if (str_offset
>= sections
->str
.size
)
14639 error (_("Offset from DW_FORM_str_index pointing outside of"
14640 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14641 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14642 return (char *) (sections
->str
.buffer
+ str_offset
);
14645 /* Return the length of an LEB128 number in BUF. */
14648 leb128_size (const gdb_byte
*buf
)
14650 const gdb_byte
*begin
= buf
;
14656 if ((byte
& 128) == 0)
14657 return buf
- begin
;
14662 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14669 cu
->language
= language_c
;
14671 case DW_LANG_C_plus_plus
:
14672 cu
->language
= language_cplus
;
14675 cu
->language
= language_d
;
14677 case DW_LANG_Fortran77
:
14678 case DW_LANG_Fortran90
:
14679 case DW_LANG_Fortran95
:
14680 cu
->language
= language_fortran
;
14683 cu
->language
= language_go
;
14685 case DW_LANG_Mips_Assembler
:
14686 cu
->language
= language_asm
;
14689 cu
->language
= language_java
;
14691 case DW_LANG_Ada83
:
14692 case DW_LANG_Ada95
:
14693 cu
->language
= language_ada
;
14695 case DW_LANG_Modula2
:
14696 cu
->language
= language_m2
;
14698 case DW_LANG_Pascal83
:
14699 cu
->language
= language_pascal
;
14702 cu
->language
= language_objc
;
14704 case DW_LANG_Cobol74
:
14705 case DW_LANG_Cobol85
:
14707 cu
->language
= language_minimal
;
14710 cu
->language_defn
= language_def (cu
->language
);
14713 /* Return the named attribute or NULL if not there. */
14715 static struct attribute
*
14716 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
14721 struct attribute
*spec
= NULL
;
14723 for (i
= 0; i
< die
->num_attrs
; ++i
)
14725 if (die
->attrs
[i
].name
== name
)
14726 return &die
->attrs
[i
];
14727 if (die
->attrs
[i
].name
== DW_AT_specification
14728 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
14729 spec
= &die
->attrs
[i
];
14735 die
= follow_die_ref (die
, spec
, &cu
);
14741 /* Return the named attribute or NULL if not there,
14742 but do not follow DW_AT_specification, etc.
14743 This is for use in contexts where we're reading .debug_types dies.
14744 Following DW_AT_specification, DW_AT_abstract_origin will take us
14745 back up the chain, and we want to go down. */
14747 static struct attribute
*
14748 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
14752 for (i
= 0; i
< die
->num_attrs
; ++i
)
14753 if (die
->attrs
[i
].name
== name
)
14754 return &die
->attrs
[i
];
14759 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14760 and holds a non-zero value. This function should only be used for
14761 DW_FORM_flag or DW_FORM_flag_present attributes. */
14764 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
14766 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
14768 return (attr
&& DW_UNSND (attr
));
14772 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
14774 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14775 which value is non-zero. However, we have to be careful with
14776 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14777 (via dwarf2_flag_true_p) follows this attribute. So we may
14778 end up accidently finding a declaration attribute that belongs
14779 to a different DIE referenced by the specification attribute,
14780 even though the given DIE does not have a declaration attribute. */
14781 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
14782 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
14785 /* Return the die giving the specification for DIE, if there is
14786 one. *SPEC_CU is the CU containing DIE on input, and the CU
14787 containing the return value on output. If there is no
14788 specification, but there is an abstract origin, that is
14791 static struct die_info
*
14792 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
14794 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
14797 if (spec_attr
== NULL
)
14798 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
14800 if (spec_attr
== NULL
)
14803 return follow_die_ref (die
, spec_attr
, spec_cu
);
14806 /* Free the line_header structure *LH, and any arrays and strings it
14808 NOTE: This is also used as a "cleanup" function. */
14811 free_line_header (struct line_header
*lh
)
14813 if (lh
->standard_opcode_lengths
)
14814 xfree (lh
->standard_opcode_lengths
);
14816 /* Remember that all the lh->file_names[i].name pointers are
14817 pointers into debug_line_buffer, and don't need to be freed. */
14818 if (lh
->file_names
)
14819 xfree (lh
->file_names
);
14821 /* Similarly for the include directory names. */
14822 if (lh
->include_dirs
)
14823 xfree (lh
->include_dirs
);
14828 /* Add an entry to LH's include directory table. */
14831 add_include_dir (struct line_header
*lh
, char *include_dir
)
14833 /* Grow the array if necessary. */
14834 if (lh
->include_dirs_size
== 0)
14836 lh
->include_dirs_size
= 1; /* for testing */
14837 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
14838 * sizeof (*lh
->include_dirs
));
14840 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
14842 lh
->include_dirs_size
*= 2;
14843 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
14844 (lh
->include_dirs_size
14845 * sizeof (*lh
->include_dirs
)));
14848 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
14851 /* Add an entry to LH's file name table. */
14854 add_file_name (struct line_header
*lh
,
14856 unsigned int dir_index
,
14857 unsigned int mod_time
,
14858 unsigned int length
)
14860 struct file_entry
*fe
;
14862 /* Grow the array if necessary. */
14863 if (lh
->file_names_size
== 0)
14865 lh
->file_names_size
= 1; /* for testing */
14866 lh
->file_names
= xmalloc (lh
->file_names_size
14867 * sizeof (*lh
->file_names
));
14869 else if (lh
->num_file_names
>= lh
->file_names_size
)
14871 lh
->file_names_size
*= 2;
14872 lh
->file_names
= xrealloc (lh
->file_names
,
14873 (lh
->file_names_size
14874 * sizeof (*lh
->file_names
)));
14877 fe
= &lh
->file_names
[lh
->num_file_names
++];
14879 fe
->dir_index
= dir_index
;
14880 fe
->mod_time
= mod_time
;
14881 fe
->length
= length
;
14882 fe
->included_p
= 0;
14886 /* A convenience function to find the proper .debug_line section for a
14889 static struct dwarf2_section_info
*
14890 get_debug_line_section (struct dwarf2_cu
*cu
)
14892 struct dwarf2_section_info
*section
;
14894 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14896 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14897 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14898 else if (cu
->per_cu
->is_dwz
)
14900 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14902 section
= &dwz
->line
;
14905 section
= &dwarf2_per_objfile
->line
;
14910 /* Read the statement program header starting at OFFSET in
14911 .debug_line, or .debug_line.dwo. Return a pointer
14912 to a struct line_header, allocated using xmalloc.
14914 NOTE: the strings in the include directory and file name tables of
14915 the returned object point into the dwarf line section buffer,
14916 and must not be freed. */
14918 static struct line_header
*
14919 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
14921 struct cleanup
*back_to
;
14922 struct line_header
*lh
;
14923 gdb_byte
*line_ptr
;
14924 unsigned int bytes_read
, offset_size
;
14926 char *cur_dir
, *cur_file
;
14927 struct dwarf2_section_info
*section
;
14930 section
= get_debug_line_section (cu
);
14931 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
14932 if (section
->buffer
== NULL
)
14934 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14935 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
14937 complaint (&symfile_complaints
, _("missing .debug_line section"));
14941 /* We can't do this until we know the section is non-empty.
14942 Only then do we know we have such a section. */
14943 abfd
= section
->asection
->owner
;
14945 /* Make sure that at least there's room for the total_length field.
14946 That could be 12 bytes long, but we're just going to fudge that. */
14947 if (offset
+ 4 >= section
->size
)
14949 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14953 lh
= xmalloc (sizeof (*lh
));
14954 memset (lh
, 0, sizeof (*lh
));
14955 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
14958 line_ptr
= section
->buffer
+ offset
;
14960 /* Read in the header. */
14962 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
14963 &bytes_read
, &offset_size
);
14964 line_ptr
+= bytes_read
;
14965 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
14967 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14970 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
14971 lh
->version
= read_2_bytes (abfd
, line_ptr
);
14973 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
14974 line_ptr
+= offset_size
;
14975 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
14977 if (lh
->version
>= 4)
14979 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
14983 lh
->maximum_ops_per_instruction
= 1;
14985 if (lh
->maximum_ops_per_instruction
== 0)
14987 lh
->maximum_ops_per_instruction
= 1;
14988 complaint (&symfile_complaints
,
14989 _("invalid maximum_ops_per_instruction "
14990 "in `.debug_line' section"));
14993 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
14995 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
14997 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
14999 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15001 lh
->standard_opcode_lengths
15002 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15004 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15005 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15007 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15011 /* Read directory table. */
15012 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15014 line_ptr
+= bytes_read
;
15015 add_include_dir (lh
, cur_dir
);
15017 line_ptr
+= bytes_read
;
15019 /* Read file name table. */
15020 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15022 unsigned int dir_index
, mod_time
, length
;
15024 line_ptr
+= bytes_read
;
15025 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15026 line_ptr
+= bytes_read
;
15027 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15028 line_ptr
+= bytes_read
;
15029 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15030 line_ptr
+= bytes_read
;
15032 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15034 line_ptr
+= bytes_read
;
15035 lh
->statement_program_start
= line_ptr
;
15037 if (line_ptr
> (section
->buffer
+ section
->size
))
15038 complaint (&symfile_complaints
,
15039 _("line number info header doesn't "
15040 "fit in `.debug_line' section"));
15042 discard_cleanups (back_to
);
15046 /* Subroutine of dwarf_decode_lines to simplify it.
15047 Return the file name of the psymtab for included file FILE_INDEX
15048 in line header LH of PST.
15049 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15050 If space for the result is malloc'd, it will be freed by a cleanup.
15051 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
15054 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15055 const struct partial_symtab
*pst
,
15056 const char *comp_dir
)
15058 const struct file_entry fe
= lh
->file_names
[file_index
];
15059 char *include_name
= fe
.name
;
15060 char *include_name_to_compare
= include_name
;
15061 char *dir_name
= NULL
;
15062 const char *pst_filename
;
15063 char *copied_name
= NULL
;
15067 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15069 if (!IS_ABSOLUTE_PATH (include_name
)
15070 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15072 /* Avoid creating a duplicate psymtab for PST.
15073 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15074 Before we do the comparison, however, we need to account
15075 for DIR_NAME and COMP_DIR.
15076 First prepend dir_name (if non-NULL). If we still don't
15077 have an absolute path prepend comp_dir (if non-NULL).
15078 However, the directory we record in the include-file's
15079 psymtab does not contain COMP_DIR (to match the
15080 corresponding symtab(s)).
15085 bash$ gcc -g ./hello.c
15086 include_name = "hello.c"
15088 DW_AT_comp_dir = comp_dir = "/tmp"
15089 DW_AT_name = "./hello.c" */
15091 if (dir_name
!= NULL
)
15093 include_name
= concat (dir_name
, SLASH_STRING
,
15094 include_name
, (char *)NULL
);
15095 include_name_to_compare
= include_name
;
15096 make_cleanup (xfree
, include_name
);
15098 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15100 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
15101 include_name
, (char *)NULL
);
15105 pst_filename
= pst
->filename
;
15106 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15108 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15109 pst_filename
, (char *)NULL
);
15110 pst_filename
= copied_name
;
15113 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15115 if (include_name_to_compare
!= include_name
)
15116 xfree (include_name_to_compare
);
15117 if (copied_name
!= NULL
)
15118 xfree (copied_name
);
15122 return include_name
;
15125 /* Ignore this record_line request. */
15128 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15133 /* Subroutine of dwarf_decode_lines to simplify it.
15134 Process the line number information in LH. */
15137 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15138 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15140 gdb_byte
*line_ptr
, *extended_end
;
15141 gdb_byte
*line_end
;
15142 unsigned int bytes_read
, extended_len
;
15143 unsigned char op_code
, extended_op
, adj_opcode
;
15144 CORE_ADDR baseaddr
;
15145 struct objfile
*objfile
= cu
->objfile
;
15146 bfd
*abfd
= objfile
->obfd
;
15147 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15148 const int decode_for_pst_p
= (pst
!= NULL
);
15149 struct subfile
*last_subfile
= NULL
;
15150 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15153 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15155 line_ptr
= lh
->statement_program_start
;
15156 line_end
= lh
->statement_program_end
;
15158 /* Read the statement sequences until there's nothing left. */
15159 while (line_ptr
< line_end
)
15161 /* state machine registers */
15162 CORE_ADDR address
= 0;
15163 unsigned int file
= 1;
15164 unsigned int line
= 1;
15165 unsigned int column
= 0;
15166 int is_stmt
= lh
->default_is_stmt
;
15167 int basic_block
= 0;
15168 int end_sequence
= 0;
15170 unsigned char op_index
= 0;
15172 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15174 /* Start a subfile for the current file of the state machine. */
15175 /* lh->include_dirs and lh->file_names are 0-based, but the
15176 directory and file name numbers in the statement program
15178 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15182 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15184 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15187 /* Decode the table. */
15188 while (!end_sequence
)
15190 op_code
= read_1_byte (abfd
, line_ptr
);
15192 if (line_ptr
> line_end
)
15194 dwarf2_debug_line_missing_end_sequence_complaint ();
15198 if (op_code
>= lh
->opcode_base
)
15200 /* Special operand. */
15201 adj_opcode
= op_code
- lh
->opcode_base
;
15202 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15203 / lh
->maximum_ops_per_instruction
)
15204 * lh
->minimum_instruction_length
);
15205 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15206 % lh
->maximum_ops_per_instruction
);
15207 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15208 if (lh
->num_file_names
< file
|| file
== 0)
15209 dwarf2_debug_line_missing_file_complaint ();
15210 /* For now we ignore lines not starting on an
15211 instruction boundary. */
15212 else if (op_index
== 0)
15214 lh
->file_names
[file
- 1].included_p
= 1;
15215 if (!decode_for_pst_p
&& is_stmt
)
15217 if (last_subfile
!= current_subfile
)
15219 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15221 (*p_record_line
) (last_subfile
, 0, addr
);
15222 last_subfile
= current_subfile
;
15224 /* Append row to matrix using current values. */
15225 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15226 (*p_record_line
) (current_subfile
, line
, addr
);
15231 else switch (op_code
)
15233 case DW_LNS_extended_op
:
15234 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15236 line_ptr
+= bytes_read
;
15237 extended_end
= line_ptr
+ extended_len
;
15238 extended_op
= read_1_byte (abfd
, line_ptr
);
15240 switch (extended_op
)
15242 case DW_LNE_end_sequence
:
15243 p_record_line
= record_line
;
15246 case DW_LNE_set_address
:
15247 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15249 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15251 /* This line table is for a function which has been
15252 GCd by the linker. Ignore it. PR gdb/12528 */
15255 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15257 complaint (&symfile_complaints
,
15258 _(".debug_line address at offset 0x%lx is 0 "
15260 line_offset
, objfile
->name
);
15261 p_record_line
= noop_record_line
;
15265 line_ptr
+= bytes_read
;
15266 address
+= baseaddr
;
15268 case DW_LNE_define_file
:
15271 unsigned int dir_index
, mod_time
, length
;
15273 cur_file
= read_direct_string (abfd
, line_ptr
,
15275 line_ptr
+= bytes_read
;
15277 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15278 line_ptr
+= bytes_read
;
15280 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15281 line_ptr
+= bytes_read
;
15283 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15284 line_ptr
+= bytes_read
;
15285 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15288 case DW_LNE_set_discriminator
:
15289 /* The discriminator is not interesting to the debugger;
15291 line_ptr
= extended_end
;
15294 complaint (&symfile_complaints
,
15295 _("mangled .debug_line section"));
15298 /* Make sure that we parsed the extended op correctly. If e.g.
15299 we expected a different address size than the producer used,
15300 we may have read the wrong number of bytes. */
15301 if (line_ptr
!= extended_end
)
15303 complaint (&symfile_complaints
,
15304 _("mangled .debug_line section"));
15309 if (lh
->num_file_names
< file
|| file
== 0)
15310 dwarf2_debug_line_missing_file_complaint ();
15313 lh
->file_names
[file
- 1].included_p
= 1;
15314 if (!decode_for_pst_p
&& is_stmt
)
15316 if (last_subfile
!= current_subfile
)
15318 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15320 (*p_record_line
) (last_subfile
, 0, addr
);
15321 last_subfile
= current_subfile
;
15323 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15324 (*p_record_line
) (current_subfile
, line
, addr
);
15329 case DW_LNS_advance_pc
:
15332 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15334 address
+= (((op_index
+ adjust
)
15335 / lh
->maximum_ops_per_instruction
)
15336 * lh
->minimum_instruction_length
);
15337 op_index
= ((op_index
+ adjust
)
15338 % lh
->maximum_ops_per_instruction
);
15339 line_ptr
+= bytes_read
;
15342 case DW_LNS_advance_line
:
15343 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15344 line_ptr
+= bytes_read
;
15346 case DW_LNS_set_file
:
15348 /* The arrays lh->include_dirs and lh->file_names are
15349 0-based, but the directory and file name numbers in
15350 the statement program are 1-based. */
15351 struct file_entry
*fe
;
15354 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15355 line_ptr
+= bytes_read
;
15356 if (lh
->num_file_names
< file
|| file
== 0)
15357 dwarf2_debug_line_missing_file_complaint ();
15360 fe
= &lh
->file_names
[file
- 1];
15362 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15363 if (!decode_for_pst_p
)
15365 last_subfile
= current_subfile
;
15366 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15371 case DW_LNS_set_column
:
15372 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15373 line_ptr
+= bytes_read
;
15375 case DW_LNS_negate_stmt
:
15376 is_stmt
= (!is_stmt
);
15378 case DW_LNS_set_basic_block
:
15381 /* Add to the address register of the state machine the
15382 address increment value corresponding to special opcode
15383 255. I.e., this value is scaled by the minimum
15384 instruction length since special opcode 255 would have
15385 scaled the increment. */
15386 case DW_LNS_const_add_pc
:
15388 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15390 address
+= (((op_index
+ adjust
)
15391 / lh
->maximum_ops_per_instruction
)
15392 * lh
->minimum_instruction_length
);
15393 op_index
= ((op_index
+ adjust
)
15394 % lh
->maximum_ops_per_instruction
);
15397 case DW_LNS_fixed_advance_pc
:
15398 address
+= read_2_bytes (abfd
, line_ptr
);
15404 /* Unknown standard opcode, ignore it. */
15407 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15409 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15410 line_ptr
+= bytes_read
;
15415 if (lh
->num_file_names
< file
|| file
== 0)
15416 dwarf2_debug_line_missing_file_complaint ();
15419 lh
->file_names
[file
- 1].included_p
= 1;
15420 if (!decode_for_pst_p
)
15422 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15423 (*p_record_line
) (current_subfile
, 0, addr
);
15429 /* Decode the Line Number Program (LNP) for the given line_header
15430 structure and CU. The actual information extracted and the type
15431 of structures created from the LNP depends on the value of PST.
15433 1. If PST is NULL, then this procedure uses the data from the program
15434 to create all necessary symbol tables, and their linetables.
15436 2. If PST is not NULL, this procedure reads the program to determine
15437 the list of files included by the unit represented by PST, and
15438 builds all the associated partial symbol tables.
15440 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15441 It is used for relative paths in the line table.
15442 NOTE: When processing partial symtabs (pst != NULL),
15443 comp_dir == pst->dirname.
15445 NOTE: It is important that psymtabs have the same file name (via strcmp)
15446 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15447 symtab we don't use it in the name of the psymtabs we create.
15448 E.g. expand_line_sal requires this when finding psymtabs to expand.
15449 A good testcase for this is mb-inline.exp. */
15452 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15453 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15454 int want_line_info
)
15456 struct objfile
*objfile
= cu
->objfile
;
15457 const int decode_for_pst_p
= (pst
!= NULL
);
15458 struct subfile
*first_subfile
= current_subfile
;
15460 if (want_line_info
)
15461 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15463 if (decode_for_pst_p
)
15467 /* Now that we're done scanning the Line Header Program, we can
15468 create the psymtab of each included file. */
15469 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15470 if (lh
->file_names
[file_index
].included_p
== 1)
15472 char *include_name
=
15473 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15474 if (include_name
!= NULL
)
15475 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15480 /* Make sure a symtab is created for every file, even files
15481 which contain only variables (i.e. no code with associated
15485 for (i
= 0; i
< lh
->num_file_names
; i
++)
15488 struct file_entry
*fe
;
15490 fe
= &lh
->file_names
[i
];
15492 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15493 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15495 /* Skip the main file; we don't need it, and it must be
15496 allocated last, so that it will show up before the
15497 non-primary symtabs in the objfile's symtab list. */
15498 if (current_subfile
== first_subfile
)
15501 if (current_subfile
->symtab
== NULL
)
15502 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15504 fe
->symtab
= current_subfile
->symtab
;
15509 /* Start a subfile for DWARF. FILENAME is the name of the file and
15510 DIRNAME the name of the source directory which contains FILENAME
15511 or NULL if not known. COMP_DIR is the compilation directory for the
15512 linetable's compilation unit or NULL if not known.
15513 This routine tries to keep line numbers from identical absolute and
15514 relative file names in a common subfile.
15516 Using the `list' example from the GDB testsuite, which resides in
15517 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15518 of /srcdir/list0.c yields the following debugging information for list0.c:
15520 DW_AT_name: /srcdir/list0.c
15521 DW_AT_comp_dir: /compdir
15522 files.files[0].name: list0.h
15523 files.files[0].dir: /srcdir
15524 files.files[1].name: list0.c
15525 files.files[1].dir: /srcdir
15527 The line number information for list0.c has to end up in a single
15528 subfile, so that `break /srcdir/list0.c:1' works as expected.
15529 start_subfile will ensure that this happens provided that we pass the
15530 concatenation of files.files[1].dir and files.files[1].name as the
15534 dwarf2_start_subfile (char *filename
, const char *dirname
,
15535 const char *comp_dir
)
15539 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15540 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15541 second argument to start_subfile. To be consistent, we do the
15542 same here. In order not to lose the line information directory,
15543 we concatenate it to the filename when it makes sense.
15544 Note that the Dwarf3 standard says (speaking of filenames in line
15545 information): ``The directory index is ignored for file names
15546 that represent full path names''. Thus ignoring dirname in the
15547 `else' branch below isn't an issue. */
15549 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15550 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15552 fullname
= filename
;
15554 start_subfile (fullname
, comp_dir
);
15556 if (fullname
!= filename
)
15560 /* Start a symtab for DWARF.
15561 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15564 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15565 char *name
, char *comp_dir
, CORE_ADDR low_pc
)
15567 start_symtab (name
, comp_dir
, low_pc
);
15568 record_debugformat ("DWARF 2");
15569 record_producer (cu
->producer
);
15571 /* We assume that we're processing GCC output. */
15572 processing_gcc_compilation
= 2;
15574 processing_has_namespace_info
= 0;
15578 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15579 struct dwarf2_cu
*cu
)
15581 struct objfile
*objfile
= cu
->objfile
;
15582 struct comp_unit_head
*cu_header
= &cu
->header
;
15584 /* NOTE drow/2003-01-30: There used to be a comment and some special
15585 code here to turn a symbol with DW_AT_external and a
15586 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15587 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15588 with some versions of binutils) where shared libraries could have
15589 relocations against symbols in their debug information - the
15590 minimal symbol would have the right address, but the debug info
15591 would not. It's no longer necessary, because we will explicitly
15592 apply relocations when we read in the debug information now. */
15594 /* A DW_AT_location attribute with no contents indicates that a
15595 variable has been optimized away. */
15596 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15598 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15602 /* Handle one degenerate form of location expression specially, to
15603 preserve GDB's previous behavior when section offsets are
15604 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15605 then mark this symbol as LOC_STATIC. */
15607 if (attr_form_is_block (attr
)
15608 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15609 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15610 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15611 && (DW_BLOCK (attr
)->size
15612 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15614 unsigned int dummy
;
15616 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15617 SYMBOL_VALUE_ADDRESS (sym
) =
15618 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15620 SYMBOL_VALUE_ADDRESS (sym
) =
15621 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15622 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15623 fixup_symbol_section (sym
, objfile
);
15624 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15625 SYMBOL_SECTION (sym
));
15629 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15630 expression evaluator, and use LOC_COMPUTED only when necessary
15631 (i.e. when the value of a register or memory location is
15632 referenced, or a thread-local block, etc.). Then again, it might
15633 not be worthwhile. I'm assuming that it isn't unless performance
15634 or memory numbers show me otherwise. */
15636 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
15637 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15639 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
15640 cu
->has_loclist
= 1;
15643 /* Given a pointer to a DWARF information entry, figure out if we need
15644 to make a symbol table entry for it, and if so, create a new entry
15645 and return a pointer to it.
15646 If TYPE is NULL, determine symbol type from the die, otherwise
15647 used the passed type.
15648 If SPACE is not NULL, use it to hold the new symbol. If it is
15649 NULL, allocate a new symbol on the objfile's obstack. */
15651 static struct symbol
*
15652 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15653 struct symbol
*space
)
15655 struct objfile
*objfile
= cu
->objfile
;
15656 struct symbol
*sym
= NULL
;
15658 struct attribute
*attr
= NULL
;
15659 struct attribute
*attr2
= NULL
;
15660 CORE_ADDR baseaddr
;
15661 struct pending
**list_to_add
= NULL
;
15663 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15665 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15667 name
= dwarf2_name (die
, cu
);
15670 const char *linkagename
;
15671 int suppress_add
= 0;
15676 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
15677 OBJSTAT (objfile
, n_syms
++);
15679 /* Cache this symbol's name and the name's demangled form (if any). */
15680 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
15681 linkagename
= dwarf2_physname (name
, die
, cu
);
15682 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15684 /* Fortran does not have mangling standard and the mangling does differ
15685 between gfortran, iFort etc. */
15686 if (cu
->language
== language_fortran
15687 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15688 symbol_set_demangled_name (&(sym
->ginfo
),
15689 (char *) dwarf2_full_name (name
, die
, cu
),
15692 /* Default assumptions.
15693 Use the passed type or decode it from the die. */
15694 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15695 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15697 SYMBOL_TYPE (sym
) = type
;
15699 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
15700 attr
= dwarf2_attr (die
,
15701 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
15705 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
15708 attr
= dwarf2_attr (die
,
15709 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
15713 int file_index
= DW_UNSND (attr
);
15715 if (cu
->line_header
== NULL
15716 || file_index
> cu
->line_header
->num_file_names
)
15717 complaint (&symfile_complaints
,
15718 _("file index out of range"));
15719 else if (file_index
> 0)
15721 struct file_entry
*fe
;
15723 fe
= &cu
->line_header
->file_names
[file_index
- 1];
15724 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
15731 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
15734 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
15736 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
15737 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
15738 SYMBOL_CLASS (sym
) = LOC_LABEL
;
15739 add_symbol_to_list (sym
, cu
->list_in_scope
);
15741 case DW_TAG_subprogram
:
15742 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15744 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15745 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15746 if ((attr2
&& (DW_UNSND (attr2
) != 0))
15747 || cu
->language
== language_ada
)
15749 /* Subprograms marked external are stored as a global symbol.
15750 Ada subprograms, whether marked external or not, are always
15751 stored as a global symbol, because we want to be able to
15752 access them globally. For instance, we want to be able
15753 to break on a nested subprogram without having to
15754 specify the context. */
15755 list_to_add
= &global_symbols
;
15759 list_to_add
= cu
->list_in_scope
;
15762 case DW_TAG_inlined_subroutine
:
15763 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15765 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15766 SYMBOL_INLINED (sym
) = 1;
15767 list_to_add
= cu
->list_in_scope
;
15769 case DW_TAG_template_value_param
:
15771 /* Fall through. */
15772 case DW_TAG_constant
:
15773 case DW_TAG_variable
:
15774 case DW_TAG_member
:
15775 /* Compilation with minimal debug info may result in
15776 variables with missing type entries. Change the
15777 misleading `void' type to something sensible. */
15778 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
15780 = objfile_type (objfile
)->nodebug_data_symbol
;
15782 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15783 /* In the case of DW_TAG_member, we should only be called for
15784 static const members. */
15785 if (die
->tag
== DW_TAG_member
)
15787 /* dwarf2_add_field uses die_is_declaration,
15788 so we do the same. */
15789 gdb_assert (die_is_declaration (die
, cu
));
15794 dwarf2_const_value (attr
, sym
, cu
);
15795 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15798 if (attr2
&& (DW_UNSND (attr2
) != 0))
15799 list_to_add
= &global_symbols
;
15801 list_to_add
= cu
->list_in_scope
;
15805 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15808 var_decode_location (attr
, sym
, cu
);
15809 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15811 /* Fortran explicitly imports any global symbols to the local
15812 scope by DW_TAG_common_block. */
15813 if (cu
->language
== language_fortran
&& die
->parent
15814 && die
->parent
->tag
== DW_TAG_common_block
)
15817 if (SYMBOL_CLASS (sym
) == LOC_STATIC
15818 && SYMBOL_VALUE_ADDRESS (sym
) == 0
15819 && !dwarf2_per_objfile
->has_section_at_zero
)
15821 /* When a static variable is eliminated by the linker,
15822 the corresponding debug information is not stripped
15823 out, but the variable address is set to null;
15824 do not add such variables into symbol table. */
15826 else if (attr2
&& (DW_UNSND (attr2
) != 0))
15828 /* Workaround gfortran PR debug/40040 - it uses
15829 DW_AT_location for variables in -fPIC libraries which may
15830 get overriden by other libraries/executable and get
15831 a different address. Resolve it by the minimal symbol
15832 which may come from inferior's executable using copy
15833 relocation. Make this workaround only for gfortran as for
15834 other compilers GDB cannot guess the minimal symbol
15835 Fortran mangling kind. */
15836 if (cu
->language
== language_fortran
&& die
->parent
15837 && die
->parent
->tag
== DW_TAG_module
15839 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
15840 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15842 /* A variable with DW_AT_external is never static,
15843 but it may be block-scoped. */
15844 list_to_add
= (cu
->list_in_scope
== &file_symbols
15845 ? &global_symbols
: cu
->list_in_scope
);
15848 list_to_add
= cu
->list_in_scope
;
15852 /* We do not know the address of this symbol.
15853 If it is an external symbol and we have type information
15854 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15855 The address of the variable will then be determined from
15856 the minimal symbol table whenever the variable is
15858 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15860 /* Fortran explicitly imports any global symbols to the local
15861 scope by DW_TAG_common_block. */
15862 if (cu
->language
== language_fortran
&& die
->parent
15863 && die
->parent
->tag
== DW_TAG_common_block
)
15865 /* SYMBOL_CLASS doesn't matter here because
15866 read_common_block is going to reset it. */
15868 list_to_add
= cu
->list_in_scope
;
15870 else if (attr2
&& (DW_UNSND (attr2
) != 0)
15871 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
15873 /* A variable with DW_AT_external is never static, but it
15874 may be block-scoped. */
15875 list_to_add
= (cu
->list_in_scope
== &file_symbols
15876 ? &global_symbols
: cu
->list_in_scope
);
15878 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15880 else if (!die_is_declaration (die
, cu
))
15882 /* Use the default LOC_OPTIMIZED_OUT class. */
15883 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15885 list_to_add
= cu
->list_in_scope
;
15889 case DW_TAG_formal_parameter
:
15890 /* If we are inside a function, mark this as an argument. If
15891 not, we might be looking at an argument to an inlined function
15892 when we do not have enough information to show inlined frames;
15893 pretend it's a local variable in that case so that the user can
15895 if (context_stack_depth
> 0
15896 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15897 SYMBOL_IS_ARGUMENT (sym
) = 1;
15898 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15901 var_decode_location (attr
, sym
, cu
);
15903 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15906 dwarf2_const_value (attr
, sym
, cu
);
15909 list_to_add
= cu
->list_in_scope
;
15911 case DW_TAG_unspecified_parameters
:
15912 /* From varargs functions; gdb doesn't seem to have any
15913 interest in this information, so just ignore it for now.
15916 case DW_TAG_template_type_param
:
15918 /* Fall through. */
15919 case DW_TAG_class_type
:
15920 case DW_TAG_interface_type
:
15921 case DW_TAG_structure_type
:
15922 case DW_TAG_union_type
:
15923 case DW_TAG_set_type
:
15924 case DW_TAG_enumeration_type
:
15925 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15926 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
15929 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
15930 really ever be static objects: otherwise, if you try
15931 to, say, break of a class's method and you're in a file
15932 which doesn't mention that class, it won't work unless
15933 the check for all static symbols in lookup_symbol_aux
15934 saves you. See the OtherFileClass tests in
15935 gdb.c++/namespace.exp. */
15939 list_to_add
= (cu
->list_in_scope
== &file_symbols
15940 && (cu
->language
== language_cplus
15941 || cu
->language
== language_java
)
15942 ? &global_symbols
: cu
->list_in_scope
);
15944 /* The semantics of C++ state that "struct foo {
15945 ... }" also defines a typedef for "foo". A Java
15946 class declaration also defines a typedef for the
15948 if (cu
->language
== language_cplus
15949 || cu
->language
== language_java
15950 || cu
->language
== language_ada
)
15952 /* The symbol's name is already allocated along
15953 with this objfile, so we don't need to
15954 duplicate it for the type. */
15955 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
15956 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
15961 case DW_TAG_typedef
:
15962 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15963 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15964 list_to_add
= cu
->list_in_scope
;
15966 case DW_TAG_base_type
:
15967 case DW_TAG_subrange_type
:
15968 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15969 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15970 list_to_add
= cu
->list_in_scope
;
15972 case DW_TAG_enumerator
:
15973 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15976 dwarf2_const_value (attr
, sym
, cu
);
15979 /* NOTE: carlton/2003-11-10: See comment above in the
15980 DW_TAG_class_type, etc. block. */
15982 list_to_add
= (cu
->list_in_scope
== &file_symbols
15983 && (cu
->language
== language_cplus
15984 || cu
->language
== language_java
)
15985 ? &global_symbols
: cu
->list_in_scope
);
15988 case DW_TAG_namespace
:
15989 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15990 list_to_add
= &global_symbols
;
15992 case DW_TAG_common_block
:
15993 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15994 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
15995 add_symbol_to_list (sym
, cu
->list_in_scope
);
15998 /* Not a tag we recognize. Hopefully we aren't processing
15999 trash data, but since we must specifically ignore things
16000 we don't recognize, there is nothing else we should do at
16002 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16003 dwarf_tag_name (die
->tag
));
16009 sym
->hash_next
= objfile
->template_symbols
;
16010 objfile
->template_symbols
= sym
;
16011 list_to_add
= NULL
;
16014 if (list_to_add
!= NULL
)
16015 add_symbol_to_list (sym
, list_to_add
);
16017 /* For the benefit of old versions of GCC, check for anonymous
16018 namespaces based on the demangled name. */
16019 if (!processing_has_namespace_info
16020 && cu
->language
== language_cplus
)
16021 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16026 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16028 static struct symbol
*
16029 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16031 return new_symbol_full (die
, type
, cu
, NULL
);
16034 /* Given an attr with a DW_FORM_dataN value in host byte order,
16035 zero-extend it as appropriate for the symbol's type. The DWARF
16036 standard (v4) is not entirely clear about the meaning of using
16037 DW_FORM_dataN for a constant with a signed type, where the type is
16038 wider than the data. The conclusion of a discussion on the DWARF
16039 list was that this is unspecified. We choose to always zero-extend
16040 because that is the interpretation long in use by GCC. */
16043 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16044 const char *name
, struct obstack
*obstack
,
16045 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16047 struct objfile
*objfile
= cu
->objfile
;
16048 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16049 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16050 LONGEST l
= DW_UNSND (attr
);
16052 if (bits
< sizeof (*value
) * 8)
16054 l
&= ((LONGEST
) 1 << bits
) - 1;
16057 else if (bits
== sizeof (*value
) * 8)
16061 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16062 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16069 /* Read a constant value from an attribute. Either set *VALUE, or if
16070 the value does not fit in *VALUE, set *BYTES - either already
16071 allocated on the objfile obstack, or newly allocated on OBSTACK,
16072 or, set *BATON, if we translated the constant to a location
16076 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16077 const char *name
, struct obstack
*obstack
,
16078 struct dwarf2_cu
*cu
,
16079 LONGEST
*value
, gdb_byte
**bytes
,
16080 struct dwarf2_locexpr_baton
**baton
)
16082 struct objfile
*objfile
= cu
->objfile
;
16083 struct comp_unit_head
*cu_header
= &cu
->header
;
16084 struct dwarf_block
*blk
;
16085 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16086 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16092 switch (attr
->form
)
16095 case DW_FORM_GNU_addr_index
:
16099 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16100 dwarf2_const_value_length_mismatch_complaint (name
,
16101 cu_header
->addr_size
,
16102 TYPE_LENGTH (type
));
16103 /* Symbols of this form are reasonably rare, so we just
16104 piggyback on the existing location code rather than writing
16105 a new implementation of symbol_computed_ops. */
16106 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16107 sizeof (struct dwarf2_locexpr_baton
));
16108 (*baton
)->per_cu
= cu
->per_cu
;
16109 gdb_assert ((*baton
)->per_cu
);
16111 (*baton
)->size
= 2 + cu_header
->addr_size
;
16112 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16113 (*baton
)->data
= data
;
16115 data
[0] = DW_OP_addr
;
16116 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16117 byte_order
, DW_ADDR (attr
));
16118 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16121 case DW_FORM_string
:
16123 case DW_FORM_GNU_str_index
:
16124 case DW_FORM_GNU_strp_alt
:
16125 /* DW_STRING is already allocated on the objfile obstack, point
16127 *bytes
= (gdb_byte
*) DW_STRING (attr
);
16129 case DW_FORM_block1
:
16130 case DW_FORM_block2
:
16131 case DW_FORM_block4
:
16132 case DW_FORM_block
:
16133 case DW_FORM_exprloc
:
16134 blk
= DW_BLOCK (attr
);
16135 if (TYPE_LENGTH (type
) != blk
->size
)
16136 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16137 TYPE_LENGTH (type
));
16138 *bytes
= blk
->data
;
16141 /* The DW_AT_const_value attributes are supposed to carry the
16142 symbol's value "represented as it would be on the target
16143 architecture." By the time we get here, it's already been
16144 converted to host endianness, so we just need to sign- or
16145 zero-extend it as appropriate. */
16146 case DW_FORM_data1
:
16147 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16148 obstack
, cu
, value
, 8);
16150 case DW_FORM_data2
:
16151 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16152 obstack
, cu
, value
, 16);
16154 case DW_FORM_data4
:
16155 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16156 obstack
, cu
, value
, 32);
16158 case DW_FORM_data8
:
16159 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16160 obstack
, cu
, value
, 64);
16163 case DW_FORM_sdata
:
16164 *value
= DW_SND (attr
);
16167 case DW_FORM_udata
:
16168 *value
= DW_UNSND (attr
);
16172 complaint (&symfile_complaints
,
16173 _("unsupported const value attribute form: '%s'"),
16174 dwarf_form_name (attr
->form
));
16181 /* Copy constant value from an attribute to a symbol. */
16184 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16185 struct dwarf2_cu
*cu
)
16187 struct objfile
*objfile
= cu
->objfile
;
16188 struct comp_unit_head
*cu_header
= &cu
->header
;
16191 struct dwarf2_locexpr_baton
*baton
;
16193 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16194 SYMBOL_PRINT_NAME (sym
),
16195 &objfile
->objfile_obstack
, cu
,
16196 &value
, &bytes
, &baton
);
16200 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16201 SYMBOL_LOCATION_BATON (sym
) = baton
;
16202 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
16204 else if (bytes
!= NULL
)
16206 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16207 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
16211 SYMBOL_VALUE (sym
) = value
;
16212 SYMBOL_CLASS (sym
) = LOC_CONST
;
16216 /* Return the type of the die in question using its DW_AT_type attribute. */
16218 static struct type
*
16219 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16221 struct attribute
*type_attr
;
16223 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16226 /* A missing DW_AT_type represents a void type. */
16227 return objfile_type (cu
->objfile
)->builtin_void
;
16230 return lookup_die_type (die
, type_attr
, cu
);
16233 /* True iff CU's producer generates GNAT Ada auxiliary information
16234 that allows to find parallel types through that information instead
16235 of having to do expensive parallel lookups by type name. */
16238 need_gnat_info (struct dwarf2_cu
*cu
)
16240 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16241 of GNAT produces this auxiliary information, without any indication
16242 that it is produced. Part of enhancing the FSF version of GNAT
16243 to produce that information will be to put in place an indicator
16244 that we can use in order to determine whether the descriptive type
16245 info is available or not. One suggestion that has been made is
16246 to use a new attribute, attached to the CU die. For now, assume
16247 that the descriptive type info is not available. */
16251 /* Return the auxiliary type of the die in question using its
16252 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16253 attribute is not present. */
16255 static struct type
*
16256 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16258 struct attribute
*type_attr
;
16260 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16264 return lookup_die_type (die
, type_attr
, cu
);
16267 /* If DIE has a descriptive_type attribute, then set the TYPE's
16268 descriptive type accordingly. */
16271 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16272 struct dwarf2_cu
*cu
)
16274 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16276 if (descriptive_type
)
16278 ALLOCATE_GNAT_AUX_TYPE (type
);
16279 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16283 /* Return the containing type of the die in question using its
16284 DW_AT_containing_type attribute. */
16286 static struct type
*
16287 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16289 struct attribute
*type_attr
;
16291 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16293 error (_("Dwarf Error: Problem turning containing type into gdb type "
16294 "[in module %s]"), cu
->objfile
->name
);
16296 return lookup_die_type (die
, type_attr
, cu
);
16299 /* Look up the type of DIE in CU using its type attribute ATTR.
16300 If there is no type substitute an error marker. */
16302 static struct type
*
16303 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16304 struct dwarf2_cu
*cu
)
16306 struct objfile
*objfile
= cu
->objfile
;
16307 struct type
*this_type
;
16309 /* First see if we have it cached. */
16311 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16313 struct dwarf2_per_cu_data
*per_cu
;
16314 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16316 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16317 this_type
= get_die_type_at_offset (offset
, per_cu
);
16319 else if (is_ref_attr (attr
))
16321 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16323 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16325 else if (attr
->form
== DW_FORM_ref_sig8
)
16327 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16329 /* sig_type will be NULL if the signatured type is missing from
16331 if (sig_type
== NULL
)
16332 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16333 "at 0x%x [in module %s]"),
16334 die
->offset
.sect_off
, objfile
->name
);
16336 gdb_assert (sig_type
->per_cu
.is_debug_types
);
16337 /* If we haven't filled in type_offset_in_section yet, then we
16338 haven't read the type in yet. */
16340 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
16343 get_die_type_at_offset (sig_type
->type_offset_in_section
,
16344 &sig_type
->per_cu
);
16349 dump_die_for_error (die
);
16350 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16351 dwarf_attr_name (attr
->name
), objfile
->name
);
16354 /* If not cached we need to read it in. */
16356 if (this_type
== NULL
)
16358 struct die_info
*type_die
;
16359 struct dwarf2_cu
*type_cu
= cu
;
16361 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
16362 /* If we found the type now, it's probably because the type came
16363 from an inter-CU reference and the type's CU got expanded before
16365 this_type
= get_die_type (type_die
, type_cu
);
16366 if (this_type
== NULL
)
16367 this_type
= read_type_die_1 (type_die
, type_cu
);
16370 /* If we still don't have a type use an error marker. */
16372 if (this_type
== NULL
)
16374 char *message
, *saved
;
16376 /* read_type_die already issued a complaint. */
16377 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16379 cu
->header
.offset
.sect_off
,
16380 die
->offset
.sect_off
);
16381 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16382 message
, strlen (message
));
16385 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16391 /* Return the type in DIE, CU.
16392 Returns NULL for invalid types.
16394 This first does a lookup in the appropriate type_hash table,
16395 and only reads the die in if necessary.
16397 NOTE: This can be called when reading in partial or full symbols. */
16399 static struct type
*
16400 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16402 struct type
*this_type
;
16404 this_type
= get_die_type (die
, cu
);
16408 return read_type_die_1 (die
, cu
);
16411 /* Read the type in DIE, CU.
16412 Returns NULL for invalid types. */
16414 static struct type
*
16415 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16417 struct type
*this_type
= NULL
;
16421 case DW_TAG_class_type
:
16422 case DW_TAG_interface_type
:
16423 case DW_TAG_structure_type
:
16424 case DW_TAG_union_type
:
16425 this_type
= read_structure_type (die
, cu
);
16427 case DW_TAG_enumeration_type
:
16428 this_type
= read_enumeration_type (die
, cu
);
16430 case DW_TAG_subprogram
:
16431 case DW_TAG_subroutine_type
:
16432 case DW_TAG_inlined_subroutine
:
16433 this_type
= read_subroutine_type (die
, cu
);
16435 case DW_TAG_array_type
:
16436 this_type
= read_array_type (die
, cu
);
16438 case DW_TAG_set_type
:
16439 this_type
= read_set_type (die
, cu
);
16441 case DW_TAG_pointer_type
:
16442 this_type
= read_tag_pointer_type (die
, cu
);
16444 case DW_TAG_ptr_to_member_type
:
16445 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16447 case DW_TAG_reference_type
:
16448 this_type
= read_tag_reference_type (die
, cu
);
16450 case DW_TAG_const_type
:
16451 this_type
= read_tag_const_type (die
, cu
);
16453 case DW_TAG_volatile_type
:
16454 this_type
= read_tag_volatile_type (die
, cu
);
16456 case DW_TAG_string_type
:
16457 this_type
= read_tag_string_type (die
, cu
);
16459 case DW_TAG_typedef
:
16460 this_type
= read_typedef (die
, cu
);
16462 case DW_TAG_subrange_type
:
16463 this_type
= read_subrange_type (die
, cu
);
16465 case DW_TAG_base_type
:
16466 this_type
= read_base_type (die
, cu
);
16468 case DW_TAG_unspecified_type
:
16469 this_type
= read_unspecified_type (die
, cu
);
16471 case DW_TAG_namespace
:
16472 this_type
= read_namespace_type (die
, cu
);
16474 case DW_TAG_module
:
16475 this_type
= read_module_type (die
, cu
);
16478 complaint (&symfile_complaints
,
16479 _("unexpected tag in read_type_die: '%s'"),
16480 dwarf_tag_name (die
->tag
));
16487 /* See if we can figure out if the class lives in a namespace. We do
16488 this by looking for a member function; its demangled name will
16489 contain namespace info, if there is any.
16490 Return the computed name or NULL.
16491 Space for the result is allocated on the objfile's obstack.
16492 This is the full-die version of guess_partial_die_structure_name.
16493 In this case we know DIE has no useful parent. */
16496 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16498 struct die_info
*spec_die
;
16499 struct dwarf2_cu
*spec_cu
;
16500 struct die_info
*child
;
16503 spec_die
= die_specification (die
, &spec_cu
);
16504 if (spec_die
!= NULL
)
16510 for (child
= die
->child
;
16512 child
= child
->sibling
)
16514 if (child
->tag
== DW_TAG_subprogram
)
16516 struct attribute
*attr
;
16518 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16520 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16524 = language_class_name_from_physname (cu
->language_defn
,
16528 if (actual_name
!= NULL
)
16530 char *die_name
= dwarf2_name (die
, cu
);
16532 if (die_name
!= NULL
16533 && strcmp (die_name
, actual_name
) != 0)
16535 /* Strip off the class name from the full name.
16536 We want the prefix. */
16537 int die_name_len
= strlen (die_name
);
16538 int actual_name_len
= strlen (actual_name
);
16540 /* Test for '::' as a sanity check. */
16541 if (actual_name_len
> die_name_len
+ 2
16542 && actual_name
[actual_name_len
16543 - die_name_len
- 1] == ':')
16545 obsavestring (actual_name
,
16546 actual_name_len
- die_name_len
- 2,
16547 &cu
->objfile
->objfile_obstack
);
16550 xfree (actual_name
);
16559 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16560 prefix part in such case. See
16561 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16564 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16566 struct attribute
*attr
;
16569 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16570 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16573 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16574 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16577 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16579 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16580 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16583 /* dwarf2_name had to be already called. */
16584 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16586 /* Strip the base name, keep any leading namespaces/classes. */
16587 base
= strrchr (DW_STRING (attr
), ':');
16588 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16591 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
16592 &cu
->objfile
->objfile_obstack
);
16595 /* Return the name of the namespace/class that DIE is defined within,
16596 or "" if we can't tell. The caller should not xfree the result.
16598 For example, if we're within the method foo() in the following
16608 then determine_prefix on foo's die will return "N::C". */
16610 static const char *
16611 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16613 struct die_info
*parent
, *spec_die
;
16614 struct dwarf2_cu
*spec_cu
;
16615 struct type
*parent_type
;
16618 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16619 && cu
->language
!= language_fortran
)
16622 retval
= anonymous_struct_prefix (die
, cu
);
16626 /* We have to be careful in the presence of DW_AT_specification.
16627 For example, with GCC 3.4, given the code
16631 // Definition of N::foo.
16635 then we'll have a tree of DIEs like this:
16637 1: DW_TAG_compile_unit
16638 2: DW_TAG_namespace // N
16639 3: DW_TAG_subprogram // declaration of N::foo
16640 4: DW_TAG_subprogram // definition of N::foo
16641 DW_AT_specification // refers to die #3
16643 Thus, when processing die #4, we have to pretend that we're in
16644 the context of its DW_AT_specification, namely the contex of die
16647 spec_die
= die_specification (die
, &spec_cu
);
16648 if (spec_die
== NULL
)
16649 parent
= die
->parent
;
16652 parent
= spec_die
->parent
;
16656 if (parent
== NULL
)
16658 else if (parent
->building_fullname
)
16661 const char *parent_name
;
16663 /* It has been seen on RealView 2.2 built binaries,
16664 DW_TAG_template_type_param types actually _defined_ as
16665 children of the parent class:
16668 template class <class Enum> Class{};
16669 Class<enum E> class_e;
16671 1: DW_TAG_class_type (Class)
16672 2: DW_TAG_enumeration_type (E)
16673 3: DW_TAG_enumerator (enum1:0)
16674 3: DW_TAG_enumerator (enum2:1)
16676 2: DW_TAG_template_type_param
16677 DW_AT_type DW_FORM_ref_udata (E)
16679 Besides being broken debug info, it can put GDB into an
16680 infinite loop. Consider:
16682 When we're building the full name for Class<E>, we'll start
16683 at Class, and go look over its template type parameters,
16684 finding E. We'll then try to build the full name of E, and
16685 reach here. We're now trying to build the full name of E,
16686 and look over the parent DIE for containing scope. In the
16687 broken case, if we followed the parent DIE of E, we'd again
16688 find Class, and once again go look at its template type
16689 arguments, etc., etc. Simply don't consider such parent die
16690 as source-level parent of this die (it can't be, the language
16691 doesn't allow it), and break the loop here. */
16692 name
= dwarf2_name (die
, cu
);
16693 parent_name
= dwarf2_name (parent
, cu
);
16694 complaint (&symfile_complaints
,
16695 _("template param type '%s' defined within parent '%s'"),
16696 name
? name
: "<unknown>",
16697 parent_name
? parent_name
: "<unknown>");
16701 switch (parent
->tag
)
16703 case DW_TAG_namespace
:
16704 parent_type
= read_type_die (parent
, cu
);
16705 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16706 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16707 Work around this problem here. */
16708 if (cu
->language
== language_cplus
16709 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
16711 /* We give a name to even anonymous namespaces. */
16712 return TYPE_TAG_NAME (parent_type
);
16713 case DW_TAG_class_type
:
16714 case DW_TAG_interface_type
:
16715 case DW_TAG_structure_type
:
16716 case DW_TAG_union_type
:
16717 case DW_TAG_module
:
16718 parent_type
= read_type_die (parent
, cu
);
16719 if (TYPE_TAG_NAME (parent_type
) != NULL
)
16720 return TYPE_TAG_NAME (parent_type
);
16722 /* An anonymous structure is only allowed non-static data
16723 members; no typedefs, no member functions, et cetera.
16724 So it does not need a prefix. */
16726 case DW_TAG_compile_unit
:
16727 case DW_TAG_partial_unit
:
16728 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16729 if (cu
->language
== language_cplus
16730 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16731 && die
->child
!= NULL
16732 && (die
->tag
== DW_TAG_class_type
16733 || die
->tag
== DW_TAG_structure_type
16734 || die
->tag
== DW_TAG_union_type
))
16736 char *name
= guess_full_die_structure_name (die
, cu
);
16742 return determine_prefix (parent
, cu
);
16746 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16747 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16748 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16749 an obconcat, otherwise allocate storage for the result. The CU argument is
16750 used to determine the language and hence, the appropriate separator. */
16752 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16755 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
16756 int physname
, struct dwarf2_cu
*cu
)
16758 const char *lead
= "";
16761 if (suffix
== NULL
|| suffix
[0] == '\0'
16762 || prefix
== NULL
|| prefix
[0] == '\0')
16764 else if (cu
->language
== language_java
)
16766 else if (cu
->language
== language_fortran
&& physname
)
16768 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16769 DW_AT_MIPS_linkage_name is preferred and used instead. */
16777 if (prefix
== NULL
)
16779 if (suffix
== NULL
)
16785 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
16787 strcpy (retval
, lead
);
16788 strcat (retval
, prefix
);
16789 strcat (retval
, sep
);
16790 strcat (retval
, suffix
);
16795 /* We have an obstack. */
16796 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
16800 /* Return sibling of die, NULL if no sibling. */
16802 static struct die_info
*
16803 sibling_die (struct die_info
*die
)
16805 return die
->sibling
;
16808 /* Get name of a die, return NULL if not found. */
16811 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
16812 struct obstack
*obstack
)
16814 if (name
&& cu
->language
== language_cplus
)
16816 char *canon_name
= cp_canonicalize_string (name
);
16818 if (canon_name
!= NULL
)
16820 if (strcmp (canon_name
, name
) != 0)
16821 name
= obsavestring (canon_name
, strlen (canon_name
),
16823 xfree (canon_name
);
16830 /* Get name of a die, return NULL if not found. */
16833 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16835 struct attribute
*attr
;
16837 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16838 if ((!attr
|| !DW_STRING (attr
))
16839 && die
->tag
!= DW_TAG_class_type
16840 && die
->tag
!= DW_TAG_interface_type
16841 && die
->tag
!= DW_TAG_structure_type
16842 && die
->tag
!= DW_TAG_union_type
)
16847 case DW_TAG_compile_unit
:
16848 case DW_TAG_partial_unit
:
16849 /* Compilation units have a DW_AT_name that is a filename, not
16850 a source language identifier. */
16851 case DW_TAG_enumeration_type
:
16852 case DW_TAG_enumerator
:
16853 /* These tags always have simple identifiers already; no need
16854 to canonicalize them. */
16855 return DW_STRING (attr
);
16857 case DW_TAG_subprogram
:
16858 /* Java constructors will all be named "<init>", so return
16859 the class name when we see this special case. */
16860 if (cu
->language
== language_java
16861 && DW_STRING (attr
) != NULL
16862 && strcmp (DW_STRING (attr
), "<init>") == 0)
16864 struct dwarf2_cu
*spec_cu
= cu
;
16865 struct die_info
*spec_die
;
16867 /* GCJ will output '<init>' for Java constructor names.
16868 For this special case, return the name of the parent class. */
16870 /* GCJ may output suprogram DIEs with AT_specification set.
16871 If so, use the name of the specified DIE. */
16872 spec_die
= die_specification (die
, &spec_cu
);
16873 if (spec_die
!= NULL
)
16874 return dwarf2_name (spec_die
, spec_cu
);
16879 if (die
->tag
== DW_TAG_class_type
)
16880 return dwarf2_name (die
, cu
);
16882 while (die
->tag
!= DW_TAG_compile_unit
16883 && die
->tag
!= DW_TAG_partial_unit
);
16887 case DW_TAG_class_type
:
16888 case DW_TAG_interface_type
:
16889 case DW_TAG_structure_type
:
16890 case DW_TAG_union_type
:
16891 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16892 structures or unions. These were of the form "._%d" in GCC 4.1,
16893 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16894 and GCC 4.4. We work around this problem by ignoring these. */
16895 if (attr
&& DW_STRING (attr
)
16896 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16897 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16900 /* GCC might emit a nameless typedef that has a linkage name. See
16901 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16902 if (!attr
|| DW_STRING (attr
) == NULL
)
16904 char *demangled
= NULL
;
16906 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16908 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16910 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16913 /* Avoid demangling DW_STRING (attr) the second time on a second
16914 call for the same DIE. */
16915 if (!DW_STRING_IS_CANONICAL (attr
))
16916 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
16922 /* FIXME: we already did this for the partial symbol... */
16923 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
16924 &cu
->objfile
->objfile_obstack
);
16925 DW_STRING_IS_CANONICAL (attr
) = 1;
16928 /* Strip any leading namespaces/classes, keep only the base name.
16929 DW_AT_name for named DIEs does not contain the prefixes. */
16930 base
= strrchr (DW_STRING (attr
), ':');
16931 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
16934 return DW_STRING (attr
);
16943 if (!DW_STRING_IS_CANONICAL (attr
))
16946 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
16947 &cu
->objfile
->objfile_obstack
);
16948 DW_STRING_IS_CANONICAL (attr
) = 1;
16950 return DW_STRING (attr
);
16953 /* Return the die that this die in an extension of, or NULL if there
16954 is none. *EXT_CU is the CU containing DIE on input, and the CU
16955 containing the return value on output. */
16957 static struct die_info
*
16958 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
16960 struct attribute
*attr
;
16962 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
16966 return follow_die_ref (die
, attr
, ext_cu
);
16969 /* Convert a DIE tag into its string name. */
16971 static const char *
16972 dwarf_tag_name (unsigned tag
)
16974 const char *name
= get_DW_TAG_name (tag
);
16977 return "DW_TAG_<unknown>";
16982 /* Convert a DWARF attribute code into its string name. */
16984 static const char *
16985 dwarf_attr_name (unsigned attr
)
16989 #ifdef MIPS /* collides with DW_AT_HP_block_index */
16990 if (attr
== DW_AT_MIPS_fde
)
16991 return "DW_AT_MIPS_fde";
16993 if (attr
== DW_AT_HP_block_index
)
16994 return "DW_AT_HP_block_index";
16997 name
= get_DW_AT_name (attr
);
17000 return "DW_AT_<unknown>";
17005 /* Convert a DWARF value form code into its string name. */
17007 static const char *
17008 dwarf_form_name (unsigned form
)
17010 const char *name
= get_DW_FORM_name (form
);
17013 return "DW_FORM_<unknown>";
17019 dwarf_bool_name (unsigned mybool
)
17027 /* Convert a DWARF type code into its string name. */
17029 static const char *
17030 dwarf_type_encoding_name (unsigned enc
)
17032 const char *name
= get_DW_ATE_name (enc
);
17035 return "DW_ATE_<unknown>";
17041 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17045 print_spaces (indent
, f
);
17046 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17047 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17049 if (die
->parent
!= NULL
)
17051 print_spaces (indent
, f
);
17052 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17053 die
->parent
->offset
.sect_off
);
17056 print_spaces (indent
, f
);
17057 fprintf_unfiltered (f
, " has children: %s\n",
17058 dwarf_bool_name (die
->child
!= NULL
));
17060 print_spaces (indent
, f
);
17061 fprintf_unfiltered (f
, " attributes:\n");
17063 for (i
= 0; i
< die
->num_attrs
; ++i
)
17065 print_spaces (indent
, f
);
17066 fprintf_unfiltered (f
, " %s (%s) ",
17067 dwarf_attr_name (die
->attrs
[i
].name
),
17068 dwarf_form_name (die
->attrs
[i
].form
));
17070 switch (die
->attrs
[i
].form
)
17073 case DW_FORM_GNU_addr_index
:
17074 fprintf_unfiltered (f
, "address: ");
17075 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17077 case DW_FORM_block2
:
17078 case DW_FORM_block4
:
17079 case DW_FORM_block
:
17080 case DW_FORM_block1
:
17081 fprintf_unfiltered (f
, "block: size %s",
17082 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17084 case DW_FORM_exprloc
:
17085 fprintf_unfiltered (f
, "expression: size %s",
17086 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17088 case DW_FORM_ref_addr
:
17089 fprintf_unfiltered (f
, "ref address: ");
17090 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17092 case DW_FORM_GNU_ref_alt
:
17093 fprintf_unfiltered (f
, "alt ref address: ");
17094 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17100 case DW_FORM_ref_udata
:
17101 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17102 (long) (DW_UNSND (&die
->attrs
[i
])));
17104 case DW_FORM_data1
:
17105 case DW_FORM_data2
:
17106 case DW_FORM_data4
:
17107 case DW_FORM_data8
:
17108 case DW_FORM_udata
:
17109 case DW_FORM_sdata
:
17110 fprintf_unfiltered (f
, "constant: %s",
17111 pulongest (DW_UNSND (&die
->attrs
[i
])));
17113 case DW_FORM_sec_offset
:
17114 fprintf_unfiltered (f
, "section offset: %s",
17115 pulongest (DW_UNSND (&die
->attrs
[i
])));
17117 case DW_FORM_ref_sig8
:
17118 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
17119 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
17120 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
17122 fprintf_unfiltered (f
, "signatured type, offset: unknown");
17124 case DW_FORM_string
:
17126 case DW_FORM_GNU_str_index
:
17127 case DW_FORM_GNU_strp_alt
:
17128 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17129 DW_STRING (&die
->attrs
[i
])
17130 ? DW_STRING (&die
->attrs
[i
]) : "",
17131 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17134 if (DW_UNSND (&die
->attrs
[i
]))
17135 fprintf_unfiltered (f
, "flag: TRUE");
17137 fprintf_unfiltered (f
, "flag: FALSE");
17139 case DW_FORM_flag_present
:
17140 fprintf_unfiltered (f
, "flag: TRUE");
17142 case DW_FORM_indirect
:
17143 /* The reader will have reduced the indirect form to
17144 the "base form" so this form should not occur. */
17145 fprintf_unfiltered (f
,
17146 "unexpected attribute form: DW_FORM_indirect");
17149 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17150 die
->attrs
[i
].form
);
17153 fprintf_unfiltered (f
, "\n");
17158 dump_die_for_error (struct die_info
*die
)
17160 dump_die_shallow (gdb_stderr
, 0, die
);
17164 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17166 int indent
= level
* 4;
17168 gdb_assert (die
!= NULL
);
17170 if (level
>= max_level
)
17173 dump_die_shallow (f
, indent
, die
);
17175 if (die
->child
!= NULL
)
17177 print_spaces (indent
, f
);
17178 fprintf_unfiltered (f
, " Children:");
17179 if (level
+ 1 < max_level
)
17181 fprintf_unfiltered (f
, "\n");
17182 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17186 fprintf_unfiltered (f
,
17187 " [not printed, max nesting level reached]\n");
17191 if (die
->sibling
!= NULL
&& level
> 0)
17193 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17197 /* This is called from the pdie macro in gdbinit.in.
17198 It's not static so gcc will keep a copy callable from gdb. */
17201 dump_die (struct die_info
*die
, int max_level
)
17203 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17207 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17211 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17217 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17218 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17221 is_ref_attr (struct attribute
*attr
)
17223 switch (attr
->form
)
17225 case DW_FORM_ref_addr
:
17230 case DW_FORM_ref_udata
:
17231 case DW_FORM_GNU_ref_alt
:
17238 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17242 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17244 sect_offset retval
= { DW_UNSND (attr
) };
17246 if (is_ref_attr (attr
))
17249 retval
.sect_off
= 0;
17250 complaint (&symfile_complaints
,
17251 _("unsupported die ref attribute form: '%s'"),
17252 dwarf_form_name (attr
->form
));
17256 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17257 * the value held by the attribute is not constant. */
17260 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17262 if (attr
->form
== DW_FORM_sdata
)
17263 return DW_SND (attr
);
17264 else if (attr
->form
== DW_FORM_udata
17265 || attr
->form
== DW_FORM_data1
17266 || attr
->form
== DW_FORM_data2
17267 || attr
->form
== DW_FORM_data4
17268 || attr
->form
== DW_FORM_data8
)
17269 return DW_UNSND (attr
);
17272 complaint (&symfile_complaints
,
17273 _("Attribute value is not a constant (%s)"),
17274 dwarf_form_name (attr
->form
));
17275 return default_value
;
17279 /* Follow reference or signature attribute ATTR of SRC_DIE.
17280 On entry *REF_CU is the CU of SRC_DIE.
17281 On exit *REF_CU is the CU of the result. */
17283 static struct die_info
*
17284 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17285 struct dwarf2_cu
**ref_cu
)
17287 struct die_info
*die
;
17289 if (is_ref_attr (attr
))
17290 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17291 else if (attr
->form
== DW_FORM_ref_sig8
)
17292 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17295 dump_die_for_error (src_die
);
17296 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17297 (*ref_cu
)->objfile
->name
);
17303 /* Follow reference OFFSET.
17304 On entry *REF_CU is the CU of the source die referencing OFFSET.
17305 On exit *REF_CU is the CU of the result.
17306 Returns NULL if OFFSET is invalid. */
17308 static struct die_info
*
17309 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17310 struct dwarf2_cu
**ref_cu
)
17312 struct die_info temp_die
;
17313 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17315 gdb_assert (cu
->per_cu
!= NULL
);
17319 if (cu
->per_cu
->is_debug_types
)
17321 /* .debug_types CUs cannot reference anything outside their CU.
17322 If they need to, they have to reference a signatured type via
17323 DW_FORM_ref_sig8. */
17324 if (! offset_in_cu_p (&cu
->header
, offset
))
17327 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17328 || ! offset_in_cu_p (&cu
->header
, offset
))
17330 struct dwarf2_per_cu_data
*per_cu
;
17332 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17335 /* If necessary, add it to the queue and load its DIEs. */
17336 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17337 load_full_comp_unit (per_cu
, cu
->language
);
17339 target_cu
= per_cu
->cu
;
17341 else if (cu
->dies
== NULL
)
17343 /* We're loading full DIEs during partial symbol reading. */
17344 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17345 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17348 *ref_cu
= target_cu
;
17349 temp_die
.offset
= offset
;
17350 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17353 /* Follow reference attribute ATTR of SRC_DIE.
17354 On entry *REF_CU is the CU of SRC_DIE.
17355 On exit *REF_CU is the CU of the result. */
17357 static struct die_info
*
17358 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17359 struct dwarf2_cu
**ref_cu
)
17361 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17362 struct dwarf2_cu
*cu
= *ref_cu
;
17363 struct die_info
*die
;
17365 die
= follow_die_offset (offset
,
17366 (attr
->form
== DW_FORM_GNU_ref_alt
17367 || cu
->per_cu
->is_dwz
),
17370 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17371 "at 0x%x [in module %s]"),
17372 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17377 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17378 Returned value is intended for DW_OP_call*. Returned
17379 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17381 struct dwarf2_locexpr_baton
17382 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17383 struct dwarf2_per_cu_data
*per_cu
,
17384 CORE_ADDR (*get_frame_pc
) (void *baton
),
17387 struct dwarf2_cu
*cu
;
17388 struct die_info
*die
;
17389 struct attribute
*attr
;
17390 struct dwarf2_locexpr_baton retval
;
17392 dw2_setup (per_cu
->objfile
);
17394 if (per_cu
->cu
== NULL
)
17398 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17400 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17401 offset
.sect_off
, per_cu
->objfile
->name
);
17403 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17406 /* DWARF: "If there is no such attribute, then there is no effect.".
17407 DATA is ignored if SIZE is 0. */
17409 retval
.data
= NULL
;
17412 else if (attr_form_is_section_offset (attr
))
17414 struct dwarf2_loclist_baton loclist_baton
;
17415 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17418 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17420 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17422 retval
.size
= size
;
17426 if (!attr_form_is_block (attr
))
17427 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17428 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17429 offset
.sect_off
, per_cu
->objfile
->name
);
17431 retval
.data
= DW_BLOCK (attr
)->data
;
17432 retval
.size
= DW_BLOCK (attr
)->size
;
17434 retval
.per_cu
= cu
->per_cu
;
17436 age_cached_comp_units ();
17441 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17444 struct dwarf2_locexpr_baton
17445 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17446 struct dwarf2_per_cu_data
*per_cu
,
17447 CORE_ADDR (*get_frame_pc
) (void *baton
),
17450 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17452 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17455 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17459 dwarf2_get_die_type (cu_offset die_offset
,
17460 struct dwarf2_per_cu_data
*per_cu
)
17462 sect_offset die_offset_sect
;
17464 dw2_setup (per_cu
->objfile
);
17466 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17467 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17470 /* Follow the signature attribute ATTR in SRC_DIE.
17471 On entry *REF_CU is the CU of SRC_DIE.
17472 On exit *REF_CU is the CU of the result. */
17474 static struct die_info
*
17475 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17476 struct dwarf2_cu
**ref_cu
)
17478 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17479 struct die_info temp_die
;
17480 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
17481 struct dwarf2_cu
*sig_cu
;
17482 struct die_info
*die
;
17484 /* sig_type will be NULL if the signatured type is missing from
17486 if (sig_type
== NULL
)
17487 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17488 "at 0x%x [in module %s]"),
17489 src_die
->offset
.sect_off
, objfile
->name
);
17491 /* If necessary, add it to the queue and load its DIEs. */
17493 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17494 read_signatured_type (sig_type
);
17496 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17498 sig_cu
= sig_type
->per_cu
.cu
;
17499 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17500 temp_die
.offset
= sig_type
->type_offset_in_section
;
17501 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17502 temp_die
.offset
.sect_off
);
17509 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17510 "from DIE at 0x%x [in module %s]"),
17511 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
17514 /* Given an offset of a signatured type, return its signatured_type. */
17516 static struct signatured_type
*
17517 lookup_signatured_type_at_offset (struct objfile
*objfile
,
17518 struct dwarf2_section_info
*section
,
17519 sect_offset offset
)
17521 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
17522 unsigned int length
, initial_length_size
;
17523 unsigned int sig_offset
;
17524 struct signatured_type find_entry
, *sig_type
;
17526 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
17527 sig_offset
= (initial_length_size
17529 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
17530 + 1 /*address_size*/);
17531 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
17532 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
17534 /* This is only used to lookup previously recorded types.
17535 If we didn't find it, it's our bug. */
17536 gdb_assert (sig_type
!= NULL
);
17537 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
17542 /* Load the DIEs associated with type unit PER_CU into memory. */
17545 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17547 struct signatured_type
*sig_type
;
17549 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17550 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17552 /* We have the per_cu, but we need the signatured_type.
17553 Fortunately this is an easy translation. */
17554 gdb_assert (per_cu
->is_debug_types
);
17555 sig_type
= (struct signatured_type
*) per_cu
;
17557 gdb_assert (per_cu
->cu
== NULL
);
17559 read_signatured_type (sig_type
);
17561 gdb_assert (per_cu
->cu
!= NULL
);
17564 /* die_reader_func for read_signatured_type.
17565 This is identical to load_full_comp_unit_reader,
17566 but is kept separate for now. */
17569 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17570 gdb_byte
*info_ptr
,
17571 struct die_info
*comp_unit_die
,
17575 struct dwarf2_cu
*cu
= reader
->cu
;
17577 gdb_assert (cu
->die_hash
== NULL
);
17579 htab_create_alloc_ex (cu
->header
.length
/ 12,
17583 &cu
->comp_unit_obstack
,
17584 hashtab_obstack_allocate
,
17585 dummy_obstack_deallocate
);
17588 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
17589 &info_ptr
, comp_unit_die
);
17590 cu
->dies
= comp_unit_die
;
17591 /* comp_unit_die is not stored in die_hash, no need. */
17593 /* We try not to read any attributes in this function, because not
17594 all CUs needed for references have been loaded yet, and symbol
17595 table processing isn't initialized. But we have to set the CU language,
17596 or we won't be able to build types correctly.
17597 Similarly, if we do not read the producer, we can not apply
17598 producer-specific interpretation. */
17599 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
17602 /* Read in a signatured type and build its CU and DIEs.
17603 If the type is a stub for the real type in a DWO file,
17604 read in the real type from the DWO file as well. */
17607 read_signatured_type (struct signatured_type
*sig_type
)
17609 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
17611 gdb_assert (per_cu
->is_debug_types
);
17612 gdb_assert (per_cu
->cu
== NULL
);
17614 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
17615 read_signatured_type_reader
, NULL
);
17618 /* Decode simple location descriptions.
17619 Given a pointer to a dwarf block that defines a location, compute
17620 the location and return the value.
17622 NOTE drow/2003-11-18: This function is called in two situations
17623 now: for the address of static or global variables (partial symbols
17624 only) and for offsets into structures which are expected to be
17625 (more or less) constant. The partial symbol case should go away,
17626 and only the constant case should remain. That will let this
17627 function complain more accurately. A few special modes are allowed
17628 without complaint for global variables (for instance, global
17629 register values and thread-local values).
17631 A location description containing no operations indicates that the
17632 object is optimized out. The return value is 0 for that case.
17633 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17634 callers will only want a very basic result and this can become a
17637 Note that stack[0] is unused except as a default error return. */
17640 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
17642 struct objfile
*objfile
= cu
->objfile
;
17644 size_t size
= blk
->size
;
17645 gdb_byte
*data
= blk
->data
;
17646 CORE_ADDR stack
[64];
17648 unsigned int bytes_read
, unsnd
;
17654 stack
[++stacki
] = 0;
17693 stack
[++stacki
] = op
- DW_OP_lit0
;
17728 stack
[++stacki
] = op
- DW_OP_reg0
;
17730 dwarf2_complex_location_expr_complaint ();
17734 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
17736 stack
[++stacki
] = unsnd
;
17738 dwarf2_complex_location_expr_complaint ();
17742 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
17747 case DW_OP_const1u
:
17748 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
17752 case DW_OP_const1s
:
17753 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
17757 case DW_OP_const2u
:
17758 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
17762 case DW_OP_const2s
:
17763 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
17767 case DW_OP_const4u
:
17768 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
17772 case DW_OP_const4s
:
17773 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
17777 case DW_OP_const8u
:
17778 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
17783 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
17789 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
17794 stack
[stacki
+ 1] = stack
[stacki
];
17799 stack
[stacki
- 1] += stack
[stacki
];
17803 case DW_OP_plus_uconst
:
17804 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
17810 stack
[stacki
- 1] -= stack
[stacki
];
17815 /* If we're not the last op, then we definitely can't encode
17816 this using GDB's address_class enum. This is valid for partial
17817 global symbols, although the variable's address will be bogus
17820 dwarf2_complex_location_expr_complaint ();
17823 case DW_OP_GNU_push_tls_address
:
17824 /* The top of the stack has the offset from the beginning
17825 of the thread control block at which the variable is located. */
17826 /* Nothing should follow this operator, so the top of stack would
17828 /* This is valid for partial global symbols, but the variable's
17829 address will be bogus in the psymtab. Make it always at least
17830 non-zero to not look as a variable garbage collected by linker
17831 which have DW_OP_addr 0. */
17833 dwarf2_complex_location_expr_complaint ();
17837 case DW_OP_GNU_uninit
:
17840 case DW_OP_GNU_addr_index
:
17841 case DW_OP_GNU_const_index
:
17842 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
17849 const char *name
= get_DW_OP_name (op
);
17852 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
17855 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
17859 return (stack
[stacki
]);
17862 /* Enforce maximum stack depth of SIZE-1 to avoid writing
17863 outside of the allocated space. Also enforce minimum>0. */
17864 if (stacki
>= ARRAY_SIZE (stack
) - 1)
17866 complaint (&symfile_complaints
,
17867 _("location description stack overflow"));
17873 complaint (&symfile_complaints
,
17874 _("location description stack underflow"));
17878 return (stack
[stacki
]);
17881 /* memory allocation interface */
17883 static struct dwarf_block
*
17884 dwarf_alloc_block (struct dwarf2_cu
*cu
)
17886 struct dwarf_block
*blk
;
17888 blk
= (struct dwarf_block
*)
17889 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
17893 static struct die_info
*
17894 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
17896 struct die_info
*die
;
17897 size_t size
= sizeof (struct die_info
);
17900 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
17902 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
17903 memset (die
, 0, sizeof (struct die_info
));
17908 /* Macro support. */
17910 /* Return the full name of file number I in *LH's file name table.
17911 Use COMP_DIR as the name of the current directory of the
17912 compilation. The result is allocated using xmalloc; the caller is
17913 responsible for freeing it. */
17915 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
17917 /* Is the file number a valid index into the line header's file name
17918 table? Remember that file numbers start with one, not zero. */
17919 if (1 <= file
&& file
<= lh
->num_file_names
)
17921 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17923 if (IS_ABSOLUTE_PATH (fe
->name
))
17924 return xstrdup (fe
->name
);
17932 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17938 dir_len
= strlen (dir
);
17939 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
17940 strcpy (full_name
, dir
);
17941 full_name
[dir_len
] = '/';
17942 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
17946 return xstrdup (fe
->name
);
17951 /* The compiler produced a bogus file number. We can at least
17952 record the macro definitions made in the file, even if we
17953 won't be able to find the file by name. */
17954 char fake_name
[80];
17956 xsnprintf (fake_name
, sizeof (fake_name
),
17957 "<bad macro file number %d>", file
);
17959 complaint (&symfile_complaints
,
17960 _("bad file number in macro information (%d)"),
17963 return xstrdup (fake_name
);
17968 static struct macro_source_file
*
17969 macro_start_file (int file
, int line
,
17970 struct macro_source_file
*current_file
,
17971 const char *comp_dir
,
17972 struct line_header
*lh
, struct objfile
*objfile
)
17974 /* The full name of this source file. */
17975 char *full_name
= file_full_name (file
, lh
, comp_dir
);
17977 /* We don't create a macro table for this compilation unit
17978 at all until we actually get a filename. */
17979 if (! pending_macros
)
17980 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
17981 objfile
->per_bfd
->macro_cache
);
17983 if (! current_file
)
17985 /* If we have no current file, then this must be the start_file
17986 directive for the compilation unit's main source file. */
17987 current_file
= macro_set_main (pending_macros
, full_name
);
17988 macro_define_special (pending_macros
);
17991 current_file
= macro_include (current_file
, line
, full_name
);
17995 return current_file
;
17999 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18000 followed by a null byte. */
18002 copy_string (const char *buf
, int len
)
18004 char *s
= xmalloc (len
+ 1);
18006 memcpy (s
, buf
, len
);
18012 static const char *
18013 consume_improper_spaces (const char *p
, const char *body
)
18017 complaint (&symfile_complaints
,
18018 _("macro definition contains spaces "
18019 "in formal argument list:\n`%s'"),
18031 parse_macro_definition (struct macro_source_file
*file
, int line
,
18036 /* The body string takes one of two forms. For object-like macro
18037 definitions, it should be:
18039 <macro name> " " <definition>
18041 For function-like macro definitions, it should be:
18043 <macro name> "() " <definition>
18045 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18047 Spaces may appear only where explicitly indicated, and in the
18050 The Dwarf 2 spec says that an object-like macro's name is always
18051 followed by a space, but versions of GCC around March 2002 omit
18052 the space when the macro's definition is the empty string.
18054 The Dwarf 2 spec says that there should be no spaces between the
18055 formal arguments in a function-like macro's formal argument list,
18056 but versions of GCC around March 2002 include spaces after the
18060 /* Find the extent of the macro name. The macro name is terminated
18061 by either a space or null character (for an object-like macro) or
18062 an opening paren (for a function-like macro). */
18063 for (p
= body
; *p
; p
++)
18064 if (*p
== ' ' || *p
== '(')
18067 if (*p
== ' ' || *p
== '\0')
18069 /* It's an object-like macro. */
18070 int name_len
= p
- body
;
18071 char *name
= copy_string (body
, name_len
);
18072 const char *replacement
;
18075 replacement
= body
+ name_len
+ 1;
18078 dwarf2_macro_malformed_definition_complaint (body
);
18079 replacement
= body
+ name_len
;
18082 macro_define_object (file
, line
, name
, replacement
);
18086 else if (*p
== '(')
18088 /* It's a function-like macro. */
18089 char *name
= copy_string (body
, p
- body
);
18092 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18096 p
= consume_improper_spaces (p
, body
);
18098 /* Parse the formal argument list. */
18099 while (*p
&& *p
!= ')')
18101 /* Find the extent of the current argument name. */
18102 const char *arg_start
= p
;
18104 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18107 if (! *p
|| p
== arg_start
)
18108 dwarf2_macro_malformed_definition_complaint (body
);
18111 /* Make sure argv has room for the new argument. */
18112 if (argc
>= argv_size
)
18115 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18118 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18121 p
= consume_improper_spaces (p
, body
);
18123 /* Consume the comma, if present. */
18128 p
= consume_improper_spaces (p
, body
);
18137 /* Perfectly formed definition, no complaints. */
18138 macro_define_function (file
, line
, name
,
18139 argc
, (const char **) argv
,
18141 else if (*p
== '\0')
18143 /* Complain, but do define it. */
18144 dwarf2_macro_malformed_definition_complaint (body
);
18145 macro_define_function (file
, line
, name
,
18146 argc
, (const char **) argv
,
18150 /* Just complain. */
18151 dwarf2_macro_malformed_definition_complaint (body
);
18154 /* Just complain. */
18155 dwarf2_macro_malformed_definition_complaint (body
);
18161 for (i
= 0; i
< argc
; i
++)
18167 dwarf2_macro_malformed_definition_complaint (body
);
18170 /* Skip some bytes from BYTES according to the form given in FORM.
18171 Returns the new pointer. */
18174 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
18175 enum dwarf_form form
,
18176 unsigned int offset_size
,
18177 struct dwarf2_section_info
*section
)
18179 unsigned int bytes_read
;
18183 case DW_FORM_data1
:
18188 case DW_FORM_data2
:
18192 case DW_FORM_data4
:
18196 case DW_FORM_data8
:
18200 case DW_FORM_string
:
18201 read_direct_string (abfd
, bytes
, &bytes_read
);
18202 bytes
+= bytes_read
;
18205 case DW_FORM_sec_offset
:
18207 case DW_FORM_GNU_strp_alt
:
18208 bytes
+= offset_size
;
18211 case DW_FORM_block
:
18212 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18213 bytes
+= bytes_read
;
18216 case DW_FORM_block1
:
18217 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18219 case DW_FORM_block2
:
18220 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18222 case DW_FORM_block4
:
18223 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18226 case DW_FORM_sdata
:
18227 case DW_FORM_udata
:
18228 case DW_FORM_GNU_addr_index
:
18229 case DW_FORM_GNU_str_index
:
18230 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
18233 dwarf2_section_buffer_overflow_complaint (section
);
18241 complaint (&symfile_complaints
,
18242 _("invalid form 0x%x in `%s'"),
18244 section
->asection
->name
);
18252 /* A helper for dwarf_decode_macros that handles skipping an unknown
18253 opcode. Returns an updated pointer to the macro data buffer; or,
18254 on error, issues a complaint and returns NULL. */
18257 skip_unknown_opcode (unsigned int opcode
,
18258 gdb_byte
**opcode_definitions
,
18259 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18261 unsigned int offset_size
,
18262 struct dwarf2_section_info
*section
)
18264 unsigned int bytes_read
, i
;
18268 if (opcode_definitions
[opcode
] == NULL
)
18270 complaint (&symfile_complaints
,
18271 _("unrecognized DW_MACFINO opcode 0x%x"),
18276 defn
= opcode_definitions
[opcode
];
18277 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18278 defn
+= bytes_read
;
18280 for (i
= 0; i
< arg
; ++i
)
18282 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18284 if (mac_ptr
== NULL
)
18286 /* skip_form_bytes already issued the complaint. */
18294 /* A helper function which parses the header of a macro section.
18295 If the macro section is the extended (for now called "GNU") type,
18296 then this updates *OFFSET_SIZE. Returns a pointer to just after
18297 the header, or issues a complaint and returns NULL on error. */
18300 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
18303 unsigned int *offset_size
,
18304 int section_is_gnu
)
18306 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18308 if (section_is_gnu
)
18310 unsigned int version
, flags
;
18312 version
= read_2_bytes (abfd
, mac_ptr
);
18315 complaint (&symfile_complaints
,
18316 _("unrecognized version `%d' in .debug_macro section"),
18322 flags
= read_1_byte (abfd
, mac_ptr
);
18324 *offset_size
= (flags
& 1) ? 8 : 4;
18326 if ((flags
& 2) != 0)
18327 /* We don't need the line table offset. */
18328 mac_ptr
+= *offset_size
;
18330 /* Vendor opcode descriptions. */
18331 if ((flags
& 4) != 0)
18333 unsigned int i
, count
;
18335 count
= read_1_byte (abfd
, mac_ptr
);
18337 for (i
= 0; i
< count
; ++i
)
18339 unsigned int opcode
, bytes_read
;
18342 opcode
= read_1_byte (abfd
, mac_ptr
);
18344 opcode_definitions
[opcode
] = mac_ptr
;
18345 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18346 mac_ptr
+= bytes_read
;
18355 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18356 including DW_MACRO_GNU_transparent_include. */
18359 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18360 struct macro_source_file
*current_file
,
18361 struct line_header
*lh
, char *comp_dir
,
18362 struct dwarf2_section_info
*section
,
18363 int section_is_gnu
, int section_is_dwz
,
18364 unsigned int offset_size
,
18365 struct objfile
*objfile
,
18366 htab_t include_hash
)
18368 enum dwarf_macro_record_type macinfo_type
;
18369 int at_commandline
;
18370 gdb_byte
*opcode_definitions
[256];
18372 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18373 &offset_size
, section_is_gnu
);
18374 if (mac_ptr
== NULL
)
18376 /* We already issued a complaint. */
18380 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18381 GDB is still reading the definitions from command line. First
18382 DW_MACINFO_start_file will need to be ignored as it was already executed
18383 to create CURRENT_FILE for the main source holding also the command line
18384 definitions. On first met DW_MACINFO_start_file this flag is reset to
18385 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18387 at_commandline
= 1;
18391 /* Do we at least have room for a macinfo type byte? */
18392 if (mac_ptr
>= mac_end
)
18394 dwarf2_section_buffer_overflow_complaint (section
);
18398 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18401 /* Note that we rely on the fact that the corresponding GNU and
18402 DWARF constants are the same. */
18403 switch (macinfo_type
)
18405 /* A zero macinfo type indicates the end of the macro
18410 case DW_MACRO_GNU_define
:
18411 case DW_MACRO_GNU_undef
:
18412 case DW_MACRO_GNU_define_indirect
:
18413 case DW_MACRO_GNU_undef_indirect
:
18414 case DW_MACRO_GNU_define_indirect_alt
:
18415 case DW_MACRO_GNU_undef_indirect_alt
:
18417 unsigned int bytes_read
;
18422 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18423 mac_ptr
+= bytes_read
;
18425 if (macinfo_type
== DW_MACRO_GNU_define
18426 || macinfo_type
== DW_MACRO_GNU_undef
)
18428 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18429 mac_ptr
+= bytes_read
;
18433 LONGEST str_offset
;
18435 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18436 mac_ptr
+= offset_size
;
18438 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18439 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18442 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18444 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18447 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18450 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18451 || macinfo_type
== DW_MACRO_GNU_define_indirect
18452 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18453 if (! current_file
)
18455 /* DWARF violation as no main source is present. */
18456 complaint (&symfile_complaints
,
18457 _("debug info with no main source gives macro %s "
18459 is_define
? _("definition") : _("undefinition"),
18463 if ((line
== 0 && !at_commandline
)
18464 || (line
!= 0 && at_commandline
))
18465 complaint (&symfile_complaints
,
18466 _("debug info gives %s macro %s with %s line %d: %s"),
18467 at_commandline
? _("command-line") : _("in-file"),
18468 is_define
? _("definition") : _("undefinition"),
18469 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18472 parse_macro_definition (current_file
, line
, body
);
18475 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18476 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18477 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18478 macro_undef (current_file
, line
, body
);
18483 case DW_MACRO_GNU_start_file
:
18485 unsigned int bytes_read
;
18488 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18489 mac_ptr
+= bytes_read
;
18490 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18491 mac_ptr
+= bytes_read
;
18493 if ((line
== 0 && !at_commandline
)
18494 || (line
!= 0 && at_commandline
))
18495 complaint (&symfile_complaints
,
18496 _("debug info gives source %d included "
18497 "from %s at %s line %d"),
18498 file
, at_commandline
? _("command-line") : _("file"),
18499 line
== 0 ? _("zero") : _("non-zero"), line
);
18501 if (at_commandline
)
18503 /* This DW_MACRO_GNU_start_file was executed in the
18505 at_commandline
= 0;
18508 current_file
= macro_start_file (file
, line
,
18509 current_file
, comp_dir
,
18514 case DW_MACRO_GNU_end_file
:
18515 if (! current_file
)
18516 complaint (&symfile_complaints
,
18517 _("macro debug info has an unmatched "
18518 "`close_file' directive"));
18521 current_file
= current_file
->included_by
;
18522 if (! current_file
)
18524 enum dwarf_macro_record_type next_type
;
18526 /* GCC circa March 2002 doesn't produce the zero
18527 type byte marking the end of the compilation
18528 unit. Complain if it's not there, but exit no
18531 /* Do we at least have room for a macinfo type byte? */
18532 if (mac_ptr
>= mac_end
)
18534 dwarf2_section_buffer_overflow_complaint (section
);
18538 /* We don't increment mac_ptr here, so this is just
18540 next_type
= read_1_byte (abfd
, mac_ptr
);
18541 if (next_type
!= 0)
18542 complaint (&symfile_complaints
,
18543 _("no terminating 0-type entry for "
18544 "macros in `.debug_macinfo' section"));
18551 case DW_MACRO_GNU_transparent_include
:
18552 case DW_MACRO_GNU_transparent_include_alt
:
18556 bfd
*include_bfd
= abfd
;
18557 struct dwarf2_section_info
*include_section
= section
;
18558 struct dwarf2_section_info alt_section
;
18559 gdb_byte
*include_mac_end
= mac_end
;
18560 int is_dwz
= section_is_dwz
;
18561 gdb_byte
*new_mac_ptr
;
18563 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18564 mac_ptr
+= offset_size
;
18566 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18568 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18570 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18573 include_bfd
= dwz
->macro
.asection
->owner
;
18574 include_section
= &dwz
->macro
;
18575 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18579 new_mac_ptr
= include_section
->buffer
+ offset
;
18580 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18584 /* This has actually happened; see
18585 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18586 complaint (&symfile_complaints
,
18587 _("recursive DW_MACRO_GNU_transparent_include in "
18588 ".debug_macro section"));
18592 *slot
= new_mac_ptr
;
18594 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
18595 include_mac_end
, current_file
,
18597 section
, section_is_gnu
, is_dwz
,
18598 offset_size
, objfile
, include_hash
);
18600 htab_remove_elt (include_hash
, new_mac_ptr
);
18605 case DW_MACINFO_vendor_ext
:
18606 if (!section_is_gnu
)
18608 unsigned int bytes_read
;
18611 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18612 mac_ptr
+= bytes_read
;
18613 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18614 mac_ptr
+= bytes_read
;
18616 /* We don't recognize any vendor extensions. */
18622 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18623 mac_ptr
, mac_end
, abfd
, offset_size
,
18625 if (mac_ptr
== NULL
)
18629 } while (macinfo_type
!= 0);
18633 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
18634 char *comp_dir
, int section_is_gnu
)
18636 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18637 struct line_header
*lh
= cu
->line_header
;
18639 gdb_byte
*mac_ptr
, *mac_end
;
18640 struct macro_source_file
*current_file
= 0;
18641 enum dwarf_macro_record_type macinfo_type
;
18642 unsigned int offset_size
= cu
->header
.offset_size
;
18643 gdb_byte
*opcode_definitions
[256];
18644 struct cleanup
*cleanup
;
18645 htab_t include_hash
;
18647 struct dwarf2_section_info
*section
;
18648 const char *section_name
;
18650 if (cu
->dwo_unit
!= NULL
)
18652 if (section_is_gnu
)
18654 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
18655 section_name
= ".debug_macro.dwo";
18659 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
18660 section_name
= ".debug_macinfo.dwo";
18665 if (section_is_gnu
)
18667 section
= &dwarf2_per_objfile
->macro
;
18668 section_name
= ".debug_macro";
18672 section
= &dwarf2_per_objfile
->macinfo
;
18673 section_name
= ".debug_macinfo";
18677 dwarf2_read_section (objfile
, section
);
18678 if (section
->buffer
== NULL
)
18680 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
18683 abfd
= section
->asection
->owner
;
18685 /* First pass: Find the name of the base filename.
18686 This filename is needed in order to process all macros whose definition
18687 (or undefinition) comes from the command line. These macros are defined
18688 before the first DW_MACINFO_start_file entry, and yet still need to be
18689 associated to the base file.
18691 To determine the base file name, we scan the macro definitions until we
18692 reach the first DW_MACINFO_start_file entry. We then initialize
18693 CURRENT_FILE accordingly so that any macro definition found before the
18694 first DW_MACINFO_start_file can still be associated to the base file. */
18696 mac_ptr
= section
->buffer
+ offset
;
18697 mac_end
= section
->buffer
+ section
->size
;
18699 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18700 &offset_size
, section_is_gnu
);
18701 if (mac_ptr
== NULL
)
18703 /* We already issued a complaint. */
18709 /* Do we at least have room for a macinfo type byte? */
18710 if (mac_ptr
>= mac_end
)
18712 /* Complaint is printed during the second pass as GDB will probably
18713 stop the first pass earlier upon finding
18714 DW_MACINFO_start_file. */
18718 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18721 /* Note that we rely on the fact that the corresponding GNU and
18722 DWARF constants are the same. */
18723 switch (macinfo_type
)
18725 /* A zero macinfo type indicates the end of the macro
18730 case DW_MACRO_GNU_define
:
18731 case DW_MACRO_GNU_undef
:
18732 /* Only skip the data by MAC_PTR. */
18734 unsigned int bytes_read
;
18736 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18737 mac_ptr
+= bytes_read
;
18738 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18739 mac_ptr
+= bytes_read
;
18743 case DW_MACRO_GNU_start_file
:
18745 unsigned int bytes_read
;
18748 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18749 mac_ptr
+= bytes_read
;
18750 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18751 mac_ptr
+= bytes_read
;
18753 current_file
= macro_start_file (file
, line
, current_file
,
18754 comp_dir
, lh
, objfile
);
18758 case DW_MACRO_GNU_end_file
:
18759 /* No data to skip by MAC_PTR. */
18762 case DW_MACRO_GNU_define_indirect
:
18763 case DW_MACRO_GNU_undef_indirect
:
18764 case DW_MACRO_GNU_define_indirect_alt
:
18765 case DW_MACRO_GNU_undef_indirect_alt
:
18767 unsigned int bytes_read
;
18769 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18770 mac_ptr
+= bytes_read
;
18771 mac_ptr
+= offset_size
;
18775 case DW_MACRO_GNU_transparent_include
:
18776 case DW_MACRO_GNU_transparent_include_alt
:
18777 /* Note that, according to the spec, a transparent include
18778 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18779 skip this opcode. */
18780 mac_ptr
+= offset_size
;
18783 case DW_MACINFO_vendor_ext
:
18784 /* Only skip the data by MAC_PTR. */
18785 if (!section_is_gnu
)
18787 unsigned int bytes_read
;
18789 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18790 mac_ptr
+= bytes_read
;
18791 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18792 mac_ptr
+= bytes_read
;
18797 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18798 mac_ptr
, mac_end
, abfd
, offset_size
,
18800 if (mac_ptr
== NULL
)
18804 } while (macinfo_type
!= 0 && current_file
== NULL
);
18806 /* Second pass: Process all entries.
18808 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18809 command-line macro definitions/undefinitions. This flag is unset when we
18810 reach the first DW_MACINFO_start_file entry. */
18812 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
18813 NULL
, xcalloc
, xfree
);
18814 cleanup
= make_cleanup_htab_delete (include_hash
);
18815 mac_ptr
= section
->buffer
+ offset
;
18816 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
18818 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
18819 current_file
, lh
, comp_dir
, section
,
18821 offset_size
, objfile
, include_hash
);
18822 do_cleanups (cleanup
);
18825 /* Check if the attribute's form is a DW_FORM_block*
18826 if so return true else false. */
18829 attr_form_is_block (struct attribute
*attr
)
18831 return (attr
== NULL
? 0 :
18832 attr
->form
== DW_FORM_block1
18833 || attr
->form
== DW_FORM_block2
18834 || attr
->form
== DW_FORM_block4
18835 || attr
->form
== DW_FORM_block
18836 || attr
->form
== DW_FORM_exprloc
);
18839 /* Return non-zero if ATTR's value is a section offset --- classes
18840 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18841 You may use DW_UNSND (attr) to retrieve such offsets.
18843 Section 7.5.4, "Attribute Encodings", explains that no attribute
18844 may have a value that belongs to more than one of these classes; it
18845 would be ambiguous if we did, because we use the same forms for all
18849 attr_form_is_section_offset (struct attribute
*attr
)
18851 return (attr
->form
== DW_FORM_data4
18852 || attr
->form
== DW_FORM_data8
18853 || attr
->form
== DW_FORM_sec_offset
);
18856 /* Return non-zero if ATTR's value falls in the 'constant' class, or
18857 zero otherwise. When this function returns true, you can apply
18858 dwarf2_get_attr_constant_value to it.
18860 However, note that for some attributes you must check
18861 attr_form_is_section_offset before using this test. DW_FORM_data4
18862 and DW_FORM_data8 are members of both the constant class, and of
18863 the classes that contain offsets into other debug sections
18864 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
18865 that, if an attribute's can be either a constant or one of the
18866 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
18867 taken as section offsets, not constants. */
18870 attr_form_is_constant (struct attribute
*attr
)
18872 switch (attr
->form
)
18874 case DW_FORM_sdata
:
18875 case DW_FORM_udata
:
18876 case DW_FORM_data1
:
18877 case DW_FORM_data2
:
18878 case DW_FORM_data4
:
18879 case DW_FORM_data8
:
18886 /* Return the .debug_loc section to use for CU.
18887 For DWO files use .debug_loc.dwo. */
18889 static struct dwarf2_section_info
*
18890 cu_debug_loc_section (struct dwarf2_cu
*cu
)
18893 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
18894 return &dwarf2_per_objfile
->loc
;
18897 /* A helper function that fills in a dwarf2_loclist_baton. */
18900 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
18901 struct dwarf2_loclist_baton
*baton
,
18902 struct attribute
*attr
)
18904 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18906 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18908 baton
->per_cu
= cu
->per_cu
;
18909 gdb_assert (baton
->per_cu
);
18910 /* We don't know how long the location list is, but make sure we
18911 don't run off the edge of the section. */
18912 baton
->size
= section
->size
- DW_UNSND (attr
);
18913 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
18914 baton
->base_address
= cu
->base_address
;
18915 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
18919 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
18920 struct dwarf2_cu
*cu
)
18922 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18923 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18925 if (attr_form_is_section_offset (attr
)
18926 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
18927 the section. If so, fall through to the complaint in the
18929 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
18931 struct dwarf2_loclist_baton
*baton
;
18933 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18934 sizeof (struct dwarf2_loclist_baton
));
18936 fill_in_loclist_baton (cu
, baton
, attr
);
18938 if (cu
->base_known
== 0)
18939 complaint (&symfile_complaints
,
18940 _("Location list used without "
18941 "specifying the CU base address."));
18943 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
18944 SYMBOL_LOCATION_BATON (sym
) = baton
;
18948 struct dwarf2_locexpr_baton
*baton
;
18950 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18951 sizeof (struct dwarf2_locexpr_baton
));
18952 baton
->per_cu
= cu
->per_cu
;
18953 gdb_assert (baton
->per_cu
);
18955 if (attr_form_is_block (attr
))
18957 /* Note that we're just copying the block's data pointer
18958 here, not the actual data. We're still pointing into the
18959 info_buffer for SYM's objfile; right now we never release
18960 that buffer, but when we do clean up properly this may
18962 baton
->size
= DW_BLOCK (attr
)->size
;
18963 baton
->data
= DW_BLOCK (attr
)->data
;
18967 dwarf2_invalid_attrib_class_complaint ("location description",
18968 SYMBOL_NATURAL_NAME (sym
));
18972 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
18973 SYMBOL_LOCATION_BATON (sym
) = baton
;
18977 /* Return the OBJFILE associated with the compilation unit CU. If CU
18978 came from a separate debuginfo file, then the master objfile is
18982 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
18984 struct objfile
*objfile
= per_cu
->objfile
;
18986 /* Return the master objfile, so that we can report and look up the
18987 correct file containing this variable. */
18988 if (objfile
->separate_debug_objfile_backlink
)
18989 objfile
= objfile
->separate_debug_objfile_backlink
;
18994 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
18995 (CU_HEADERP is unused in such case) or prepare a temporary copy at
18996 CU_HEADERP first. */
18998 static const struct comp_unit_head
*
18999 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19000 struct dwarf2_per_cu_data
*per_cu
)
19002 gdb_byte
*info_ptr
;
19005 return &per_cu
->cu
->header
;
19007 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
19009 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19010 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19015 /* Return the address size given in the compilation unit header for CU. */
19018 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19020 struct comp_unit_head cu_header_local
;
19021 const struct comp_unit_head
*cu_headerp
;
19023 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19025 return cu_headerp
->addr_size
;
19028 /* Return the offset size given in the compilation unit header for CU. */
19031 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19033 struct comp_unit_head cu_header_local
;
19034 const struct comp_unit_head
*cu_headerp
;
19036 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19038 return cu_headerp
->offset_size
;
19041 /* See its dwarf2loc.h declaration. */
19044 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19046 struct comp_unit_head cu_header_local
;
19047 const struct comp_unit_head
*cu_headerp
;
19049 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19051 if (cu_headerp
->version
== 2)
19052 return cu_headerp
->addr_size
;
19054 return cu_headerp
->offset_size
;
19057 /* Return the text offset of the CU. The returned offset comes from
19058 this CU's objfile. If this objfile came from a separate debuginfo
19059 file, then the offset may be different from the corresponding
19060 offset in the parent objfile. */
19063 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19065 struct objfile
*objfile
= per_cu
->objfile
;
19067 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19070 /* Locate the .debug_info compilation unit from CU's objfile which contains
19071 the DIE at OFFSET. Raises an error on failure. */
19073 static struct dwarf2_per_cu_data
*
19074 dwarf2_find_containing_comp_unit (sect_offset offset
,
19075 unsigned int offset_in_dwz
,
19076 struct objfile
*objfile
)
19078 struct dwarf2_per_cu_data
*this_cu
;
19080 const sect_offset
*cu_off
;
19083 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19086 struct dwarf2_per_cu_data
*mid_cu
;
19087 int mid
= low
+ (high
- low
) / 2;
19089 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19090 cu_off
= &mid_cu
->offset
;
19091 if (mid_cu
->is_dwz
> offset_in_dwz
19092 || (mid_cu
->is_dwz
== offset_in_dwz
19093 && cu_off
->sect_off
>= offset
.sect_off
))
19098 gdb_assert (low
== high
);
19099 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19100 cu_off
= &this_cu
->offset
;
19101 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19103 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19104 error (_("Dwarf Error: could not find partial DIE containing "
19105 "offset 0x%lx [in module %s]"),
19106 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19108 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19109 <= offset
.sect_off
);
19110 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19114 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19115 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19116 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19117 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19118 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19123 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19126 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19128 memset (cu
, 0, sizeof (*cu
));
19130 cu
->per_cu
= per_cu
;
19131 cu
->objfile
= per_cu
->objfile
;
19132 obstack_init (&cu
->comp_unit_obstack
);
19135 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19138 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19139 enum language pretend_language
)
19141 struct attribute
*attr
;
19143 /* Set the language we're debugging. */
19144 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19146 set_cu_language (DW_UNSND (attr
), cu
);
19149 cu
->language
= pretend_language
;
19150 cu
->language_defn
= language_def (cu
->language
);
19153 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19155 cu
->producer
= DW_STRING (attr
);
19158 /* Release one cached compilation unit, CU. We unlink it from the tree
19159 of compilation units, but we don't remove it from the read_in_chain;
19160 the caller is responsible for that.
19161 NOTE: DATA is a void * because this function is also used as a
19162 cleanup routine. */
19165 free_heap_comp_unit (void *data
)
19167 struct dwarf2_cu
*cu
= data
;
19169 gdb_assert (cu
->per_cu
!= NULL
);
19170 cu
->per_cu
->cu
= NULL
;
19173 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19178 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19179 when we're finished with it. We can't free the pointer itself, but be
19180 sure to unlink it from the cache. Also release any associated storage. */
19183 free_stack_comp_unit (void *data
)
19185 struct dwarf2_cu
*cu
= data
;
19187 gdb_assert (cu
->per_cu
!= NULL
);
19188 cu
->per_cu
->cu
= NULL
;
19191 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19192 cu
->partial_dies
= NULL
;
19195 /* Free all cached compilation units. */
19198 free_cached_comp_units (void *data
)
19200 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19202 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19203 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19204 while (per_cu
!= NULL
)
19206 struct dwarf2_per_cu_data
*next_cu
;
19208 next_cu
= per_cu
->cu
->read_in_chain
;
19210 free_heap_comp_unit (per_cu
->cu
);
19211 *last_chain
= next_cu
;
19217 /* Increase the age counter on each cached compilation unit, and free
19218 any that are too old. */
19221 age_cached_comp_units (void)
19223 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19225 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19226 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19227 while (per_cu
!= NULL
)
19229 per_cu
->cu
->last_used
++;
19230 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19231 dwarf2_mark (per_cu
->cu
);
19232 per_cu
= per_cu
->cu
->read_in_chain
;
19235 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19236 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19237 while (per_cu
!= NULL
)
19239 struct dwarf2_per_cu_data
*next_cu
;
19241 next_cu
= per_cu
->cu
->read_in_chain
;
19243 if (!per_cu
->cu
->mark
)
19245 free_heap_comp_unit (per_cu
->cu
);
19246 *last_chain
= next_cu
;
19249 last_chain
= &per_cu
->cu
->read_in_chain
;
19255 /* Remove a single compilation unit from the cache. */
19258 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19260 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19262 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19263 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19264 while (per_cu
!= NULL
)
19266 struct dwarf2_per_cu_data
*next_cu
;
19268 next_cu
= per_cu
->cu
->read_in_chain
;
19270 if (per_cu
== target_per_cu
)
19272 free_heap_comp_unit (per_cu
->cu
);
19274 *last_chain
= next_cu
;
19278 last_chain
= &per_cu
->cu
->read_in_chain
;
19284 /* Release all extra memory associated with OBJFILE. */
19287 dwarf2_free_objfile (struct objfile
*objfile
)
19289 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19291 if (dwarf2_per_objfile
== NULL
)
19294 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19295 free_cached_comp_units (NULL
);
19297 if (dwarf2_per_objfile
->quick_file_names_table
)
19298 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19300 /* Everything else should be on the objfile obstack. */
19303 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19304 We store these in a hash table separate from the DIEs, and preserve them
19305 when the DIEs are flushed out of cache.
19307 The CU "per_cu" pointer is needed because offset alone is not enough to
19308 uniquely identify the type. A file may have multiple .debug_types sections,
19309 or the type may come from a DWO file. We have to use something in
19310 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19311 routine, get_die_type_at_offset, from outside this file, and thus won't
19312 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19315 struct dwarf2_per_cu_offset_and_type
19317 const struct dwarf2_per_cu_data
*per_cu
;
19318 sect_offset offset
;
19322 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19325 per_cu_offset_and_type_hash (const void *item
)
19327 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19329 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19332 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19335 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19337 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19338 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19340 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19341 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19344 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19345 table if necessary. For convenience, return TYPE.
19347 The DIEs reading must have careful ordering to:
19348 * Not cause infite loops trying to read in DIEs as a prerequisite for
19349 reading current DIE.
19350 * Not trying to dereference contents of still incompletely read in types
19351 while reading in other DIEs.
19352 * Enable referencing still incompletely read in types just by a pointer to
19353 the type without accessing its fields.
19355 Therefore caller should follow these rules:
19356 * Try to fetch any prerequisite types we may need to build this DIE type
19357 before building the type and calling set_die_type.
19358 * After building type call set_die_type for current DIE as soon as
19359 possible before fetching more types to complete the current type.
19360 * Make the type as complete as possible before fetching more types. */
19362 static struct type
*
19363 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19365 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19366 struct objfile
*objfile
= cu
->objfile
;
19368 /* For Ada types, make sure that the gnat-specific data is always
19369 initialized (if not already set). There are a few types where
19370 we should not be doing so, because the type-specific area is
19371 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19372 where the type-specific area is used to store the floatformat).
19373 But this is not a problem, because the gnat-specific information
19374 is actually not needed for these types. */
19375 if (need_gnat_info (cu
)
19376 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19377 && TYPE_CODE (type
) != TYPE_CODE_FLT
19378 && !HAVE_GNAT_AUX_INFO (type
))
19379 INIT_GNAT_SPECIFIC (type
);
19381 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19383 dwarf2_per_objfile
->die_type_hash
=
19384 htab_create_alloc_ex (127,
19385 per_cu_offset_and_type_hash
,
19386 per_cu_offset_and_type_eq
,
19388 &objfile
->objfile_obstack
,
19389 hashtab_obstack_allocate
,
19390 dummy_obstack_deallocate
);
19393 ofs
.per_cu
= cu
->per_cu
;
19394 ofs
.offset
= die
->offset
;
19396 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19397 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19399 complaint (&symfile_complaints
,
19400 _("A problem internal to GDB: DIE 0x%x has type already set"),
19401 die
->offset
.sect_off
);
19402 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19407 /* Look up the type for the die at OFFSET in the appropriate type_hash
19408 table, or return NULL if the die does not have a saved type. */
19410 static struct type
*
19411 get_die_type_at_offset (sect_offset offset
,
19412 struct dwarf2_per_cu_data
*per_cu
)
19414 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19416 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19419 ofs
.per_cu
= per_cu
;
19420 ofs
.offset
= offset
;
19421 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19428 /* Look up the type for DIE in the appropriate type_hash table,
19429 or return NULL if DIE does not have a saved type. */
19431 static struct type
*
19432 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19434 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19437 /* Add a dependence relationship from CU to REF_PER_CU. */
19440 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19441 struct dwarf2_per_cu_data
*ref_per_cu
)
19445 if (cu
->dependencies
== NULL
)
19447 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19448 NULL
, &cu
->comp_unit_obstack
,
19449 hashtab_obstack_allocate
,
19450 dummy_obstack_deallocate
);
19452 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19454 *slot
= ref_per_cu
;
19457 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19458 Set the mark field in every compilation unit in the
19459 cache that we must keep because we are keeping CU. */
19462 dwarf2_mark_helper (void **slot
, void *data
)
19464 struct dwarf2_per_cu_data
*per_cu
;
19466 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19468 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19469 reading of the chain. As such dependencies remain valid it is not much
19470 useful to track and undo them during QUIT cleanups. */
19471 if (per_cu
->cu
== NULL
)
19474 if (per_cu
->cu
->mark
)
19476 per_cu
->cu
->mark
= 1;
19478 if (per_cu
->cu
->dependencies
!= NULL
)
19479 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19484 /* Set the mark field in CU and in every other compilation unit in the
19485 cache that we must keep because we are keeping CU. */
19488 dwarf2_mark (struct dwarf2_cu
*cu
)
19493 if (cu
->dependencies
!= NULL
)
19494 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19498 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19502 per_cu
->cu
->mark
= 0;
19503 per_cu
= per_cu
->cu
->read_in_chain
;
19507 /* Trivial hash function for partial_die_info: the hash value of a DIE
19508 is its offset in .debug_info for this objfile. */
19511 partial_die_hash (const void *item
)
19513 const struct partial_die_info
*part_die
= item
;
19515 return part_die
->offset
.sect_off
;
19518 /* Trivial comparison function for partial_die_info structures: two DIEs
19519 are equal if they have the same offset. */
19522 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19524 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19525 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19527 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19530 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19531 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19534 set_dwarf2_cmd (char *args
, int from_tty
)
19536 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19540 show_dwarf2_cmd (char *args
, int from_tty
)
19542 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19545 /* Free data associated with OBJFILE, if necessary. */
19548 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19550 struct dwarf2_per_objfile
*data
= d
;
19553 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19554 VEC_free (dwarf2_per_cu_ptr
,
19555 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
19557 VEC_free (dwarf2_section_info_def
, data
->types
);
19559 if (data
->dwo_files
)
19560 free_dwo_files (data
->dwo_files
, objfile
);
19562 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19563 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19567 /* The "save gdb-index" command. */
19569 /* The contents of the hash table we create when building the string
19571 struct strtab_entry
19573 offset_type offset
;
19577 /* Hash function for a strtab_entry.
19579 Function is used only during write_hash_table so no index format backward
19580 compatibility is needed. */
19583 hash_strtab_entry (const void *e
)
19585 const struct strtab_entry
*entry
= e
;
19586 return mapped_index_string_hash (INT_MAX
, entry
->str
);
19589 /* Equality function for a strtab_entry. */
19592 eq_strtab_entry (const void *a
, const void *b
)
19594 const struct strtab_entry
*ea
= a
;
19595 const struct strtab_entry
*eb
= b
;
19596 return !strcmp (ea
->str
, eb
->str
);
19599 /* Create a strtab_entry hash table. */
19602 create_strtab (void)
19604 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
19605 xfree
, xcalloc
, xfree
);
19608 /* Add a string to the constant pool. Return the string's offset in
19612 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
19615 struct strtab_entry entry
;
19616 struct strtab_entry
*result
;
19619 slot
= htab_find_slot (table
, &entry
, INSERT
);
19624 result
= XNEW (struct strtab_entry
);
19625 result
->offset
= obstack_object_size (cpool
);
19627 obstack_grow_str0 (cpool
, str
);
19630 return result
->offset
;
19633 /* An entry in the symbol table. */
19634 struct symtab_index_entry
19636 /* The name of the symbol. */
19638 /* The offset of the name in the constant pool. */
19639 offset_type index_offset
;
19640 /* A sorted vector of the indices of all the CUs that hold an object
19642 VEC (offset_type
) *cu_indices
;
19645 /* The symbol table. This is a power-of-2-sized hash table. */
19646 struct mapped_symtab
19648 offset_type n_elements
;
19650 struct symtab_index_entry
**data
;
19653 /* Hash function for a symtab_index_entry. */
19656 hash_symtab_entry (const void *e
)
19658 const struct symtab_index_entry
*entry
= e
;
19659 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
19660 sizeof (offset_type
) * VEC_length (offset_type
,
19661 entry
->cu_indices
),
19665 /* Equality function for a symtab_index_entry. */
19668 eq_symtab_entry (const void *a
, const void *b
)
19670 const struct symtab_index_entry
*ea
= a
;
19671 const struct symtab_index_entry
*eb
= b
;
19672 int len
= VEC_length (offset_type
, ea
->cu_indices
);
19673 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
19675 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
19676 VEC_address (offset_type
, eb
->cu_indices
),
19677 sizeof (offset_type
) * len
);
19680 /* Destroy a symtab_index_entry. */
19683 delete_symtab_entry (void *p
)
19685 struct symtab_index_entry
*entry
= p
;
19686 VEC_free (offset_type
, entry
->cu_indices
);
19690 /* Create a hash table holding symtab_index_entry objects. */
19693 create_symbol_hash_table (void)
19695 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
19696 delete_symtab_entry
, xcalloc
, xfree
);
19699 /* Create a new mapped symtab object. */
19701 static struct mapped_symtab
*
19702 create_mapped_symtab (void)
19704 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
19705 symtab
->n_elements
= 0;
19706 symtab
->size
= 1024;
19707 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19711 /* Destroy a mapped_symtab. */
19714 cleanup_mapped_symtab (void *p
)
19716 struct mapped_symtab
*symtab
= p
;
19717 /* The contents of the array are freed when the other hash table is
19719 xfree (symtab
->data
);
19723 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19726 Function is used only during write_hash_table so no index format backward
19727 compatibility is needed. */
19729 static struct symtab_index_entry
**
19730 find_slot (struct mapped_symtab
*symtab
, const char *name
)
19732 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
19734 index
= hash
& (symtab
->size
- 1);
19735 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
19739 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
19740 return &symtab
->data
[index
];
19741 index
= (index
+ step
) & (symtab
->size
- 1);
19745 /* Expand SYMTAB's hash table. */
19748 hash_expand (struct mapped_symtab
*symtab
)
19750 offset_type old_size
= symtab
->size
;
19752 struct symtab_index_entry
**old_entries
= symtab
->data
;
19755 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19757 for (i
= 0; i
< old_size
; ++i
)
19759 if (old_entries
[i
])
19761 struct symtab_index_entry
**slot
= find_slot (symtab
,
19762 old_entries
[i
]->name
);
19763 *slot
= old_entries
[i
];
19767 xfree (old_entries
);
19770 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19771 CU_INDEX is the index of the CU in which the symbol appears.
19772 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19775 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
19776 int is_static
, gdb_index_symbol_kind kind
,
19777 offset_type cu_index
)
19779 struct symtab_index_entry
**slot
;
19780 offset_type cu_index_and_attrs
;
19782 ++symtab
->n_elements
;
19783 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
19784 hash_expand (symtab
);
19786 slot
= find_slot (symtab
, name
);
19789 *slot
= XNEW (struct symtab_index_entry
);
19790 (*slot
)->name
= name
;
19791 /* index_offset is set later. */
19792 (*slot
)->cu_indices
= NULL
;
19795 cu_index_and_attrs
= 0;
19796 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
19797 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
19798 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
19800 /* We don't want to record an index value twice as we want to avoid the
19802 We process all global symbols and then all static symbols
19803 (which would allow us to avoid the duplication by only having to check
19804 the last entry pushed), but a symbol could have multiple kinds in one CU.
19805 To keep things simple we don't worry about the duplication here and
19806 sort and uniqufy the list after we've processed all symbols. */
19807 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
19810 /* qsort helper routine for uniquify_cu_indices. */
19813 offset_type_compare (const void *ap
, const void *bp
)
19815 offset_type a
= *(offset_type
*) ap
;
19816 offset_type b
= *(offset_type
*) bp
;
19818 return (a
> b
) - (b
> a
);
19821 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19824 uniquify_cu_indices (struct mapped_symtab
*symtab
)
19828 for (i
= 0; i
< symtab
->size
; ++i
)
19830 struct symtab_index_entry
*entry
= symtab
->data
[i
];
19833 && entry
->cu_indices
!= NULL
)
19835 unsigned int next_to_insert
, next_to_check
;
19836 offset_type last_value
;
19838 qsort (VEC_address (offset_type
, entry
->cu_indices
),
19839 VEC_length (offset_type
, entry
->cu_indices
),
19840 sizeof (offset_type
), offset_type_compare
);
19842 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
19843 next_to_insert
= 1;
19844 for (next_to_check
= 1;
19845 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
19848 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
19851 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
19853 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
19858 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
19863 /* Add a vector of indices to the constant pool. */
19866 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
19867 struct symtab_index_entry
*entry
)
19871 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
19874 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
19875 offset_type val
= MAYBE_SWAP (len
);
19880 entry
->index_offset
= obstack_object_size (cpool
);
19882 obstack_grow (cpool
, &val
, sizeof (val
));
19884 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
19887 val
= MAYBE_SWAP (iter
);
19888 obstack_grow (cpool
, &val
, sizeof (val
));
19893 struct symtab_index_entry
*old_entry
= *slot
;
19894 entry
->index_offset
= old_entry
->index_offset
;
19897 return entry
->index_offset
;
19900 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
19901 constant pool entries going into the obstack CPOOL. */
19904 write_hash_table (struct mapped_symtab
*symtab
,
19905 struct obstack
*output
, struct obstack
*cpool
)
19908 htab_t symbol_hash_table
;
19911 symbol_hash_table
= create_symbol_hash_table ();
19912 str_table
= create_strtab ();
19914 /* We add all the index vectors to the constant pool first, to
19915 ensure alignment is ok. */
19916 for (i
= 0; i
< symtab
->size
; ++i
)
19918 if (symtab
->data
[i
])
19919 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
19922 /* Now write out the hash table. */
19923 for (i
= 0; i
< symtab
->size
; ++i
)
19925 offset_type str_off
, vec_off
;
19927 if (symtab
->data
[i
])
19929 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
19930 vec_off
= symtab
->data
[i
]->index_offset
;
19934 /* While 0 is a valid constant pool index, it is not valid
19935 to have 0 for both offsets. */
19940 str_off
= MAYBE_SWAP (str_off
);
19941 vec_off
= MAYBE_SWAP (vec_off
);
19943 obstack_grow (output
, &str_off
, sizeof (str_off
));
19944 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
19947 htab_delete (str_table
);
19948 htab_delete (symbol_hash_table
);
19951 /* Struct to map psymtab to CU index in the index file. */
19952 struct psymtab_cu_index_map
19954 struct partial_symtab
*psymtab
;
19955 unsigned int cu_index
;
19959 hash_psymtab_cu_index (const void *item
)
19961 const struct psymtab_cu_index_map
*map
= item
;
19963 return htab_hash_pointer (map
->psymtab
);
19967 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
19969 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
19970 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
19972 return lhs
->psymtab
== rhs
->psymtab
;
19975 /* Helper struct for building the address table. */
19976 struct addrmap_index_data
19978 struct objfile
*objfile
;
19979 struct obstack
*addr_obstack
;
19980 htab_t cu_index_htab
;
19982 /* Non-zero if the previous_* fields are valid.
19983 We can't write an entry until we see the next entry (since it is only then
19984 that we know the end of the entry). */
19985 int previous_valid
;
19986 /* Index of the CU in the table of all CUs in the index file. */
19987 unsigned int previous_cu_index
;
19988 /* Start address of the CU. */
19989 CORE_ADDR previous_cu_start
;
19992 /* Write an address entry to OBSTACK. */
19995 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
19996 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
19998 offset_type cu_index_to_write
;
20000 CORE_ADDR baseaddr
;
20002 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20004 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20005 obstack_grow (obstack
, addr
, 8);
20006 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20007 obstack_grow (obstack
, addr
, 8);
20008 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20009 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20012 /* Worker function for traversing an addrmap to build the address table. */
20015 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20017 struct addrmap_index_data
*data
= datap
;
20018 struct partial_symtab
*pst
= obj
;
20020 if (data
->previous_valid
)
20021 add_address_entry (data
->objfile
, data
->addr_obstack
,
20022 data
->previous_cu_start
, start_addr
,
20023 data
->previous_cu_index
);
20025 data
->previous_cu_start
= start_addr
;
20028 struct psymtab_cu_index_map find_map
, *map
;
20029 find_map
.psymtab
= pst
;
20030 map
= htab_find (data
->cu_index_htab
, &find_map
);
20031 gdb_assert (map
!= NULL
);
20032 data
->previous_cu_index
= map
->cu_index
;
20033 data
->previous_valid
= 1;
20036 data
->previous_valid
= 0;
20041 /* Write OBJFILE's address map to OBSTACK.
20042 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20043 in the index file. */
20046 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20047 htab_t cu_index_htab
)
20049 struct addrmap_index_data addrmap_index_data
;
20051 /* When writing the address table, we have to cope with the fact that
20052 the addrmap iterator only provides the start of a region; we have to
20053 wait until the next invocation to get the start of the next region. */
20055 addrmap_index_data
.objfile
= objfile
;
20056 addrmap_index_data
.addr_obstack
= obstack
;
20057 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20058 addrmap_index_data
.previous_valid
= 0;
20060 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20061 &addrmap_index_data
);
20063 /* It's highly unlikely the last entry (end address = 0xff...ff)
20064 is valid, but we should still handle it.
20065 The end address is recorded as the start of the next region, but that
20066 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20068 if (addrmap_index_data
.previous_valid
)
20069 add_address_entry (objfile
, obstack
,
20070 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20071 addrmap_index_data
.previous_cu_index
);
20074 /* Return the symbol kind of PSYM. */
20076 static gdb_index_symbol_kind
20077 symbol_kind (struct partial_symbol
*psym
)
20079 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20080 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20088 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20090 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20092 case LOC_CONST_BYTES
:
20093 case LOC_OPTIMIZED_OUT
:
20095 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20097 /* Note: It's currently impossible to recognize psyms as enum values
20098 short of reading the type info. For now punt. */
20099 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20101 /* There are other LOC_FOO values that one might want to classify
20102 as variables, but dwarf2read.c doesn't currently use them. */
20103 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20105 case STRUCT_DOMAIN
:
20106 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20108 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20112 /* Add a list of partial symbols to SYMTAB. */
20115 write_psymbols (struct mapped_symtab
*symtab
,
20117 struct partial_symbol
**psymp
,
20119 offset_type cu_index
,
20122 for (; count
-- > 0; ++psymp
)
20124 struct partial_symbol
*psym
= *psymp
;
20127 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20128 error (_("Ada is not currently supported by the index"));
20130 /* Only add a given psymbol once. */
20131 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20134 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20137 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20138 is_static
, kind
, cu_index
);
20143 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20144 exception if there is an error. */
20147 write_obstack (FILE *file
, struct obstack
*obstack
)
20149 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20151 != obstack_object_size (obstack
))
20152 error (_("couldn't data write to file"));
20155 /* Unlink a file if the argument is not NULL. */
20158 unlink_if_set (void *p
)
20160 char **filename
= p
;
20162 unlink (*filename
);
20165 /* A helper struct used when iterating over debug_types. */
20166 struct signatured_type_index_data
20168 struct objfile
*objfile
;
20169 struct mapped_symtab
*symtab
;
20170 struct obstack
*types_list
;
20175 /* A helper function that writes a single signatured_type to an
20179 write_one_signatured_type (void **slot
, void *d
)
20181 struct signatured_type_index_data
*info
= d
;
20182 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20183 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
20184 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20187 write_psymbols (info
->symtab
,
20189 info
->objfile
->global_psymbols
.list
20190 + psymtab
->globals_offset
,
20191 psymtab
->n_global_syms
, info
->cu_index
,
20193 write_psymbols (info
->symtab
,
20195 info
->objfile
->static_psymbols
.list
20196 + psymtab
->statics_offset
,
20197 psymtab
->n_static_syms
, info
->cu_index
,
20200 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20201 entry
->per_cu
.offset
.sect_off
);
20202 obstack_grow (info
->types_list
, val
, 8);
20203 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20204 entry
->type_offset_in_tu
.cu_off
);
20205 obstack_grow (info
->types_list
, val
, 8);
20206 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20207 obstack_grow (info
->types_list
, val
, 8);
20214 /* Recurse into all "included" dependencies and write their symbols as
20215 if they appeared in this psymtab. */
20218 recursively_write_psymbols (struct objfile
*objfile
,
20219 struct partial_symtab
*psymtab
,
20220 struct mapped_symtab
*symtab
,
20222 offset_type cu_index
)
20226 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20227 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20228 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20229 symtab
, psyms_seen
, cu_index
);
20231 write_psymbols (symtab
,
20233 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20234 psymtab
->n_global_syms
, cu_index
,
20236 write_psymbols (symtab
,
20238 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20239 psymtab
->n_static_syms
, cu_index
,
20243 /* Create an index file for OBJFILE in the directory DIR. */
20246 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20248 struct cleanup
*cleanup
;
20249 char *filename
, *cleanup_filename
;
20250 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20251 struct obstack cu_list
, types_cu_list
;
20254 struct mapped_symtab
*symtab
;
20255 offset_type val
, size_of_contents
, total_len
;
20258 htab_t cu_index_htab
;
20259 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20261 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20264 if (dwarf2_per_objfile
->using_index
)
20265 error (_("Cannot use an index to create the index"));
20267 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20268 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20270 if (stat (objfile
->name
, &st
) < 0)
20271 perror_with_name (objfile
->name
);
20273 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20274 INDEX_SUFFIX
, (char *) NULL
);
20275 cleanup
= make_cleanup (xfree
, filename
);
20277 out_file
= fopen (filename
, "wb");
20279 error (_("Can't open `%s' for writing"), filename
);
20281 cleanup_filename
= filename
;
20282 make_cleanup (unlink_if_set
, &cleanup_filename
);
20284 symtab
= create_mapped_symtab ();
20285 make_cleanup (cleanup_mapped_symtab
, symtab
);
20287 obstack_init (&addr_obstack
);
20288 make_cleanup_obstack_free (&addr_obstack
);
20290 obstack_init (&cu_list
);
20291 make_cleanup_obstack_free (&cu_list
);
20293 obstack_init (&types_cu_list
);
20294 make_cleanup_obstack_free (&types_cu_list
);
20296 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20297 NULL
, xcalloc
, xfree
);
20298 make_cleanup_htab_delete (psyms_seen
);
20300 /* While we're scanning CU's create a table that maps a psymtab pointer
20301 (which is what addrmap records) to its index (which is what is recorded
20302 in the index file). This will later be needed to write the address
20304 cu_index_htab
= htab_create_alloc (100,
20305 hash_psymtab_cu_index
,
20306 eq_psymtab_cu_index
,
20307 NULL
, xcalloc
, xfree
);
20308 make_cleanup_htab_delete (cu_index_htab
);
20309 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20310 xmalloc (sizeof (struct psymtab_cu_index_map
)
20311 * dwarf2_per_objfile
->n_comp_units
);
20312 make_cleanup (xfree
, psymtab_cu_index_map
);
20314 /* The CU list is already sorted, so we don't need to do additional
20315 work here. Also, the debug_types entries do not appear in
20316 all_comp_units, but only in their own hash table. */
20317 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20319 struct dwarf2_per_cu_data
*per_cu
20320 = dwarf2_per_objfile
->all_comp_units
[i
];
20321 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20323 struct psymtab_cu_index_map
*map
;
20326 if (psymtab
->user
== NULL
)
20327 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20329 map
= &psymtab_cu_index_map
[i
];
20330 map
->psymtab
= psymtab
;
20332 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20333 gdb_assert (slot
!= NULL
);
20334 gdb_assert (*slot
== NULL
);
20337 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20338 per_cu
->offset
.sect_off
);
20339 obstack_grow (&cu_list
, val
, 8);
20340 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20341 obstack_grow (&cu_list
, val
, 8);
20344 /* Dump the address map. */
20345 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20347 /* Write out the .debug_type entries, if any. */
20348 if (dwarf2_per_objfile
->signatured_types
)
20350 struct signatured_type_index_data sig_data
;
20352 sig_data
.objfile
= objfile
;
20353 sig_data
.symtab
= symtab
;
20354 sig_data
.types_list
= &types_cu_list
;
20355 sig_data
.psyms_seen
= psyms_seen
;
20356 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20357 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20358 write_one_signatured_type
, &sig_data
);
20361 /* Now that we've processed all symbols we can shrink their cu_indices
20363 uniquify_cu_indices (symtab
);
20365 obstack_init (&constant_pool
);
20366 make_cleanup_obstack_free (&constant_pool
);
20367 obstack_init (&symtab_obstack
);
20368 make_cleanup_obstack_free (&symtab_obstack
);
20369 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20371 obstack_init (&contents
);
20372 make_cleanup_obstack_free (&contents
);
20373 size_of_contents
= 6 * sizeof (offset_type
);
20374 total_len
= size_of_contents
;
20376 /* The version number. */
20377 val
= MAYBE_SWAP (7);
20378 obstack_grow (&contents
, &val
, sizeof (val
));
20380 /* The offset of the CU list from the start of the file. */
20381 val
= MAYBE_SWAP (total_len
);
20382 obstack_grow (&contents
, &val
, sizeof (val
));
20383 total_len
+= obstack_object_size (&cu_list
);
20385 /* The offset of the types CU list from the start of the file. */
20386 val
= MAYBE_SWAP (total_len
);
20387 obstack_grow (&contents
, &val
, sizeof (val
));
20388 total_len
+= obstack_object_size (&types_cu_list
);
20390 /* The offset of the address table from the start of the file. */
20391 val
= MAYBE_SWAP (total_len
);
20392 obstack_grow (&contents
, &val
, sizeof (val
));
20393 total_len
+= obstack_object_size (&addr_obstack
);
20395 /* The offset of the symbol table from the start of the file. */
20396 val
= MAYBE_SWAP (total_len
);
20397 obstack_grow (&contents
, &val
, sizeof (val
));
20398 total_len
+= obstack_object_size (&symtab_obstack
);
20400 /* The offset of the constant pool from the start of the file. */
20401 val
= MAYBE_SWAP (total_len
);
20402 obstack_grow (&contents
, &val
, sizeof (val
));
20403 total_len
+= obstack_object_size (&constant_pool
);
20405 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20407 write_obstack (out_file
, &contents
);
20408 write_obstack (out_file
, &cu_list
);
20409 write_obstack (out_file
, &types_cu_list
);
20410 write_obstack (out_file
, &addr_obstack
);
20411 write_obstack (out_file
, &symtab_obstack
);
20412 write_obstack (out_file
, &constant_pool
);
20416 /* We want to keep the file, so we set cleanup_filename to NULL
20417 here. See unlink_if_set. */
20418 cleanup_filename
= NULL
;
20420 do_cleanups (cleanup
);
20423 /* Implementation of the `save gdb-index' command.
20425 Note that the file format used by this command is documented in the
20426 GDB manual. Any changes here must be documented there. */
20429 save_gdb_index_command (char *arg
, int from_tty
)
20431 struct objfile
*objfile
;
20434 error (_("usage: save gdb-index DIRECTORY"));
20436 ALL_OBJFILES (objfile
)
20440 /* If the objfile does not correspond to an actual file, skip it. */
20441 if (stat (objfile
->name
, &st
) < 0)
20444 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20445 if (dwarf2_per_objfile
)
20447 volatile struct gdb_exception except
;
20449 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20451 write_psymtabs_to_index (objfile
, arg
);
20453 if (except
.reason
< 0)
20454 exception_fprintf (gdb_stderr
, except
,
20455 _("Error while writing index for `%s': "),
20463 int dwarf2_always_disassemble
;
20466 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20467 struct cmd_list_element
*c
, const char *value
)
20469 fprintf_filtered (file
,
20470 _("Whether to always disassemble "
20471 "DWARF expressions is %s.\n"),
20476 show_check_physname (struct ui_file
*file
, int from_tty
,
20477 struct cmd_list_element
*c
, const char *value
)
20479 fprintf_filtered (file
,
20480 _("Whether to check \"physname\" is %s.\n"),
20484 void _initialize_dwarf2_read (void);
20487 _initialize_dwarf2_read (void)
20489 struct cmd_list_element
*c
;
20491 dwarf2_objfile_data_key
20492 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20494 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20495 Set DWARF 2 specific variables.\n\
20496 Configure DWARF 2 variables such as the cache size"),
20497 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20498 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20500 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20501 Show DWARF 2 specific variables\n\
20502 Show DWARF 2 variables such as the cache size"),
20503 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20504 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20506 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20507 &dwarf2_max_cache_age
, _("\
20508 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20509 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20510 A higher limit means that cached compilation units will be stored\n\
20511 in memory longer, and more total memory will be used. Zero disables\n\
20512 caching, which can slow down startup."),
20514 show_dwarf2_max_cache_age
,
20515 &set_dwarf2_cmdlist
,
20516 &show_dwarf2_cmdlist
);
20518 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20519 &dwarf2_always_disassemble
, _("\
20520 Set whether `info address' always disassembles DWARF expressions."), _("\
20521 Show whether `info address' always disassembles DWARF expressions."), _("\
20522 When enabled, DWARF expressions are always printed in an assembly-like\n\
20523 syntax. When disabled, expressions will be printed in a more\n\
20524 conversational style, when possible."),
20526 show_dwarf2_always_disassemble
,
20527 &set_dwarf2_cmdlist
,
20528 &show_dwarf2_cmdlist
);
20530 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20531 Set debugging of the dwarf2 reader."), _("\
20532 Show debugging of the dwarf2 reader."), _("\
20533 When enabled, debugging messages are printed during dwarf2 reading\n\
20534 and symtab expansion."),
20537 &setdebuglist
, &showdebuglist
);
20539 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20540 Set debugging of the dwarf2 DIE reader."), _("\
20541 Show debugging of the dwarf2 DIE reader."), _("\
20542 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20543 The value is the maximum depth to print."),
20546 &setdebuglist
, &showdebuglist
);
20548 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20549 Set cross-checking of \"physname\" code against demangler."), _("\
20550 Show cross-checking of \"physname\" code against demangler."), _("\
20551 When enabled, GDB's internal \"physname\" code is checked against\n\
20553 NULL
, show_check_physname
,
20554 &setdebuglist
, &showdebuglist
);
20556 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20557 no_class
, &use_deprecated_index_sections
, _("\
20558 Set whether to use deprecated gdb_index sections."), _("\
20559 Show whether to use deprecated gdb_index sections."), _("\
20560 When enabled, deprecated .gdb_index sections are used anyway.\n\
20561 Normally they are ignored either because of a missing feature or\n\
20562 performance issue.\n\
20563 Warning: This option must be enabled before gdb reads the file."),
20566 &setlist
, &showlist
);
20568 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20570 Save a gdb-index file.\n\
20571 Usage: save gdb-index DIRECTORY"),
20573 set_cmd_completer (c
, filename_completer
);