1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2013 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "exceptions.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
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_read_symtab (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 /* die_reader_func for dw2_get_file_names. */
2820 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2822 struct die_info
*comp_unit_die
,
2826 struct dwarf2_cu
*cu
= reader
->cu
;
2827 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2828 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2829 struct dwarf2_per_cu_data
*lh_cu
;
2830 struct line_header
*lh
;
2831 struct attribute
*attr
;
2833 char *name
, *comp_dir
;
2835 struct quick_file_names
*qfn
;
2836 unsigned int line_offset
;
2838 /* Our callers never want to match partial units -- instead they
2839 will match the enclosing full CU. */
2840 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2842 this_cu
->v
.quick
->no_file_data
= 1;
2846 /* If we're reading the line header for TUs, store it in the "per_cu"
2848 if (this_cu
->is_debug_types
)
2850 struct type_unit_group
*tu_group
= data
;
2852 gdb_assert (tu_group
!= NULL
);
2853 lh_cu
= &tu_group
->per_cu
;
2862 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2865 struct quick_file_names find_entry
;
2867 line_offset
= DW_UNSND (attr
);
2869 /* We may have already read in this line header (TU line header sharing).
2870 If we have we're done. */
2871 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2872 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2873 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2874 &find_entry
, INSERT
);
2877 lh_cu
->v
.quick
->file_names
= *slot
;
2881 lh
= dwarf_decode_line_header (line_offset
, cu
);
2885 lh_cu
->v
.quick
->no_file_data
= 1;
2889 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2890 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2891 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2892 gdb_assert (slot
!= NULL
);
2895 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2897 qfn
->num_file_names
= lh
->num_file_names
;
2898 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2899 lh
->num_file_names
* sizeof (char *));
2900 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2901 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2902 qfn
->real_names
= NULL
;
2904 free_line_header (lh
);
2906 lh_cu
->v
.quick
->file_names
= qfn
;
2909 /* A helper for the "quick" functions which attempts to read the line
2910 table for THIS_CU. */
2912 static struct quick_file_names
*
2913 dw2_get_file_names (struct objfile
*objfile
,
2914 struct dwarf2_per_cu_data
*this_cu
)
2916 /* For TUs this should only be called on the parent group. */
2917 if (this_cu
->is_debug_types
)
2918 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2920 if (this_cu
->v
.quick
->file_names
!= NULL
)
2921 return this_cu
->v
.quick
->file_names
;
2922 /* If we know there is no line data, no point in looking again. */
2923 if (this_cu
->v
.quick
->no_file_data
)
2926 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2927 in the stub for CUs, there's is no need to lookup the DWO file.
2928 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2930 if (this_cu
->is_debug_types
)
2932 struct type_unit_group
*tu_group
= this_cu
->s
.type_unit_group
;
2934 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2935 dw2_get_file_names_reader
, tu_group
);
2938 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2940 if (this_cu
->v
.quick
->no_file_data
)
2942 return this_cu
->v
.quick
->file_names
;
2945 /* A helper for the "quick" functions which computes and caches the
2946 real path for a given file name from the line table. */
2949 dw2_get_real_path (struct objfile
*objfile
,
2950 struct quick_file_names
*qfn
, int index
)
2952 if (qfn
->real_names
== NULL
)
2953 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2954 qfn
->num_file_names
, sizeof (char *));
2956 if (qfn
->real_names
[index
] == NULL
)
2957 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2959 return qfn
->real_names
[index
];
2962 static struct symtab
*
2963 dw2_find_last_source_symtab (struct objfile
*objfile
)
2967 dw2_setup (objfile
);
2968 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2969 return dw2_instantiate_symtab (dw2_get_cu (index
));
2972 /* Traversal function for dw2_forget_cached_source_info. */
2975 dw2_free_cached_file_names (void **slot
, void *info
)
2977 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2979 if (file_data
->real_names
)
2983 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2985 xfree ((void*) file_data
->real_names
[i
]);
2986 file_data
->real_names
[i
] = NULL
;
2994 dw2_forget_cached_source_info (struct objfile
*objfile
)
2996 dw2_setup (objfile
);
2998 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2999 dw2_free_cached_file_names
, NULL
);
3002 /* Helper function for dw2_map_symtabs_matching_filename that expands
3003 the symtabs and calls the iterator. */
3006 dw2_map_expand_apply (struct objfile
*objfile
,
3007 struct dwarf2_per_cu_data
*per_cu
,
3009 const char *full_path
, const char *real_path
,
3010 int (*callback
) (struct symtab
*, void *),
3013 struct symtab
*last_made
= objfile
->symtabs
;
3015 /* Don't visit already-expanded CUs. */
3016 if (per_cu
->v
.quick
->symtab
)
3019 /* This may expand more than one symtab, and we want to iterate over
3021 dw2_instantiate_symtab (per_cu
);
3023 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
3024 objfile
->symtabs
, last_made
);
3027 /* Implementation of the map_symtabs_matching_filename method. */
3030 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3031 const char *full_path
, const char *real_path
,
3032 int (*callback
) (struct symtab
*, void *),
3036 const char *name_basename
= lbasename (name
);
3037 int is_abs
= IS_ABSOLUTE_PATH (name
);
3039 dw2_setup (objfile
);
3041 /* The rule is CUs specify all the files, including those used by
3042 any TU, so there's no need to scan TUs here. */
3044 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3047 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3048 struct quick_file_names
*file_data
;
3050 /* We only need to look at symtabs not already expanded. */
3051 if (per_cu
->v
.quick
->symtab
)
3054 file_data
= dw2_get_file_names (objfile
, per_cu
);
3055 if (file_data
== NULL
)
3058 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3060 const char *this_name
= file_data
->file_names
[j
];
3062 if (FILENAME_CMP (name
, this_name
) == 0
3063 || (!is_abs
&& compare_filenames_for_search (this_name
, name
)))
3065 if (dw2_map_expand_apply (objfile
, per_cu
,
3066 name
, full_path
, real_path
,
3071 /* Before we invoke realpath, which can get expensive when many
3072 files are involved, do a quick comparison of the basenames. */
3073 if (! basenames_may_differ
3074 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3077 if (full_path
!= NULL
)
3079 const char *this_real_name
= dw2_get_real_path (objfile
,
3082 if (this_real_name
!= NULL
3083 && (FILENAME_CMP (full_path
, this_real_name
) == 0
3085 && compare_filenames_for_search (this_real_name
,
3088 if (dw2_map_expand_apply (objfile
, per_cu
,
3089 name
, full_path
, real_path
,
3095 if (real_path
!= NULL
)
3097 const char *this_real_name
= dw2_get_real_path (objfile
,
3100 if (this_real_name
!= NULL
3101 && (FILENAME_CMP (real_path
, this_real_name
) == 0
3103 && compare_filenames_for_search (this_real_name
,
3106 if (dw2_map_expand_apply (objfile
, per_cu
,
3107 name
, full_path
, real_path
,
3118 /* Struct used to manage iterating over all CUs looking for a symbol. */
3120 struct dw2_symtab_iterator
3122 /* The internalized form of .gdb_index. */
3123 struct mapped_index
*index
;
3124 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3125 int want_specific_block
;
3126 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3127 Unused if !WANT_SPECIFIC_BLOCK. */
3129 /* The kind of symbol we're looking for. */
3131 /* The list of CUs from the index entry of the symbol,
3132 or NULL if not found. */
3134 /* The next element in VEC to look at. */
3136 /* The number of elements in VEC, or zero if there is no match. */
3140 /* Initialize the index symtab iterator ITER.
3141 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3142 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3145 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3146 struct mapped_index
*index
,
3147 int want_specific_block
,
3152 iter
->index
= index
;
3153 iter
->want_specific_block
= want_specific_block
;
3154 iter
->block_index
= block_index
;
3155 iter
->domain
= domain
;
3158 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3159 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3167 /* Return the next matching CU or NULL if there are no more. */
3169 static struct dwarf2_per_cu_data
*
3170 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3172 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3174 offset_type cu_index_and_attrs
=
3175 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3176 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3177 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3178 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3179 /* This value is only valid for index versions >= 7. */
3180 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3181 gdb_index_symbol_kind symbol_kind
=
3182 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3183 /* Only check the symbol attributes if they're present.
3184 Indices prior to version 7 don't record them,
3185 and indices >= 7 may elide them for certain symbols
3186 (gold does this). */
3188 (iter
->index
->version
>= 7
3189 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3191 /* Skip if already read in. */
3192 if (per_cu
->v
.quick
->symtab
)
3196 && iter
->want_specific_block
3197 && want_static
!= is_static
)
3200 /* Only check the symbol's kind if it has one. */
3203 switch (iter
->domain
)
3206 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3207 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3208 /* Some types are also in VAR_DOMAIN. */
3209 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3213 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3217 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3232 static struct symtab
*
3233 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3234 const char *name
, domain_enum domain
)
3236 struct symtab
*stab_best
= NULL
;
3237 struct mapped_index
*index
;
3239 dw2_setup (objfile
);
3241 index
= dwarf2_per_objfile
->index_table
;
3243 /* index is NULL if OBJF_READNOW. */
3246 struct dw2_symtab_iterator iter
;
3247 struct dwarf2_per_cu_data
*per_cu
;
3249 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3251 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3253 struct symbol
*sym
= NULL
;
3254 struct symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3256 /* Some caution must be observed with overloaded functions
3257 and methods, since the index will not contain any overload
3258 information (but NAME might contain it). */
3261 struct blockvector
*bv
= BLOCKVECTOR (stab
);
3262 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3264 sym
= lookup_block_symbol (block
, name
, domain
);
3267 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3269 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3275 /* Keep looking through other CUs. */
3283 dw2_print_stats (struct objfile
*objfile
)
3287 dw2_setup (objfile
);
3289 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3290 + dwarf2_per_objfile
->n_type_units
); ++i
)
3292 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3294 if (!per_cu
->v
.quick
->symtab
)
3297 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3301 dw2_dump (struct objfile
*objfile
)
3303 /* Nothing worth printing. */
3307 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3308 struct section_offsets
*delta
)
3310 /* There's nothing to relocate here. */
3314 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3315 const char *func_name
)
3317 struct mapped_index
*index
;
3319 dw2_setup (objfile
);
3321 index
= dwarf2_per_objfile
->index_table
;
3323 /* index is NULL if OBJF_READNOW. */
3326 struct dw2_symtab_iterator iter
;
3327 struct dwarf2_per_cu_data
*per_cu
;
3329 /* Note: It doesn't matter what we pass for block_index here. */
3330 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3333 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3334 dw2_instantiate_symtab (per_cu
);
3339 dw2_expand_all_symtabs (struct objfile
*objfile
)
3343 dw2_setup (objfile
);
3345 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3346 + dwarf2_per_objfile
->n_type_units
); ++i
)
3348 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3350 dw2_instantiate_symtab (per_cu
);
3355 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3356 const char *filename
)
3360 dw2_setup (objfile
);
3362 /* We don't need to consider type units here.
3363 This is only called for examining code, e.g. expand_line_sal.
3364 There can be an order of magnitude (or more) more type units
3365 than comp units, and we avoid them if we can. */
3367 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3370 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3371 struct quick_file_names
*file_data
;
3373 /* We only need to look at symtabs not already expanded. */
3374 if (per_cu
->v
.quick
->symtab
)
3377 file_data
= dw2_get_file_names (objfile
, per_cu
);
3378 if (file_data
== NULL
)
3381 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3383 const char *this_name
= file_data
->file_names
[j
];
3384 if (FILENAME_CMP (this_name
, filename
) == 0)
3386 dw2_instantiate_symtab (per_cu
);
3393 /* A helper function for dw2_find_symbol_file that finds the primary
3394 file name for a given CU. This is a die_reader_func. */
3397 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3399 struct die_info
*comp_unit_die
,
3403 const char **result_ptr
= data
;
3404 struct dwarf2_cu
*cu
= reader
->cu
;
3405 struct attribute
*attr
;
3407 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3411 *result_ptr
= DW_STRING (attr
);
3415 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3417 struct dwarf2_per_cu_data
*per_cu
;
3419 const char *filename
;
3421 dw2_setup (objfile
);
3423 /* index_table is NULL if OBJF_READNOW. */
3424 if (!dwarf2_per_objfile
->index_table
)
3428 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3430 struct blockvector
*bv
= BLOCKVECTOR (s
);
3431 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3432 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3435 return SYMBOL_SYMTAB (sym
)->filename
;
3440 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3444 /* Note that this just looks at the very first one named NAME -- but
3445 actually we are looking for a function. find_main_filename
3446 should be rewritten so that it doesn't require a custom hook. It
3447 could just use the ordinary symbol tables. */
3448 /* vec[0] is the length, which must always be >0. */
3449 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3451 if (per_cu
->v
.quick
->symtab
!= NULL
)
3452 return per_cu
->v
.quick
->symtab
->filename
;
3454 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3455 dw2_get_primary_filename_reader
, &filename
);
3461 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3462 struct objfile
*objfile
, int global
,
3463 int (*callback
) (struct block
*,
3464 struct symbol
*, void *),
3465 void *data
, symbol_compare_ftype
*match
,
3466 symbol_compare_ftype
*ordered_compare
)
3468 /* Currently unimplemented; used for Ada. The function can be called if the
3469 current language is Ada for a non-Ada objfile using GNU index. As Ada
3470 does not look for non-Ada symbols this function should just return. */
3474 dw2_expand_symtabs_matching
3475 (struct objfile
*objfile
,
3476 int (*file_matcher
) (const char *, void *),
3477 int (*name_matcher
) (const char *, void *),
3478 enum search_domain kind
,
3483 struct mapped_index
*index
;
3485 dw2_setup (objfile
);
3487 /* index_table is NULL if OBJF_READNOW. */
3488 if (!dwarf2_per_objfile
->index_table
)
3490 index
= dwarf2_per_objfile
->index_table
;
3492 if (file_matcher
!= NULL
)
3494 struct cleanup
*cleanup
;
3495 htab_t visited_found
, visited_not_found
;
3497 visited_found
= htab_create_alloc (10,
3498 htab_hash_pointer
, htab_eq_pointer
,
3499 NULL
, xcalloc
, xfree
);
3500 cleanup
= make_cleanup_htab_delete (visited_found
);
3501 visited_not_found
= htab_create_alloc (10,
3502 htab_hash_pointer
, htab_eq_pointer
,
3503 NULL
, xcalloc
, xfree
);
3504 make_cleanup_htab_delete (visited_not_found
);
3506 /* The rule is CUs specify all the files, including those used by
3507 any TU, so there's no need to scan TUs here. */
3509 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3512 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3513 struct quick_file_names
*file_data
;
3516 per_cu
->v
.quick
->mark
= 0;
3518 /* We only need to look at symtabs not already expanded. */
3519 if (per_cu
->v
.quick
->symtab
)
3522 file_data
= dw2_get_file_names (objfile
, per_cu
);
3523 if (file_data
== NULL
)
3526 if (htab_find (visited_not_found
, file_data
) != NULL
)
3528 else if (htab_find (visited_found
, file_data
) != NULL
)
3530 per_cu
->v
.quick
->mark
= 1;
3534 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3536 if (file_matcher (file_data
->file_names
[j
], data
))
3538 per_cu
->v
.quick
->mark
= 1;
3543 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3545 : visited_not_found
,
3550 do_cleanups (cleanup
);
3553 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3555 offset_type idx
= 2 * iter
;
3557 offset_type
*vec
, vec_len
, vec_idx
;
3559 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3562 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3564 if (! (*name_matcher
) (name
, data
))
3567 /* The name was matched, now expand corresponding CUs that were
3569 vec
= (offset_type
*) (index
->constant_pool
3570 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3571 vec_len
= MAYBE_SWAP (vec
[0]);
3572 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3574 struct dwarf2_per_cu_data
*per_cu
;
3575 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3576 gdb_index_symbol_kind symbol_kind
=
3577 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3578 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3580 /* Don't crash on bad data. */
3581 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3582 + dwarf2_per_objfile
->n_type_units
))
3585 /* Only check the symbol's kind if it has one.
3586 Indices prior to version 7 don't record it. */
3587 if (index
->version
>= 7)
3591 case VARIABLES_DOMAIN
:
3592 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3595 case FUNCTIONS_DOMAIN
:
3596 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3600 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3608 per_cu
= dw2_get_cu (cu_index
);
3609 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3610 dw2_instantiate_symtab (per_cu
);
3615 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3618 static struct symtab
*
3619 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3623 if (BLOCKVECTOR (symtab
) != NULL
3624 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3627 if (symtab
->includes
== NULL
)
3630 for (i
= 0; symtab
->includes
[i
]; ++i
)
3632 struct symtab
*s
= symtab
->includes
[i
];
3634 s
= recursively_find_pc_sect_symtab (s
, pc
);
3642 static struct symtab
*
3643 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3644 struct minimal_symbol
*msymbol
,
3646 struct obj_section
*section
,
3649 struct dwarf2_per_cu_data
*data
;
3650 struct symtab
*result
;
3652 dw2_setup (objfile
);
3654 if (!objfile
->psymtabs_addrmap
)
3657 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3661 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3662 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3663 paddress (get_objfile_arch (objfile
), pc
));
3665 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3666 gdb_assert (result
!= NULL
);
3671 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3672 void *data
, int need_fullname
)
3675 struct cleanup
*cleanup
;
3676 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3677 NULL
, xcalloc
, xfree
);
3679 cleanup
= make_cleanup_htab_delete (visited
);
3680 dw2_setup (objfile
);
3682 /* The rule is CUs specify all the files, including those used by
3683 any TU, so there's no need to scan TUs here.
3684 We can ignore file names coming from already-expanded CUs. */
3686 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3688 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3690 if (per_cu
->v
.quick
->symtab
)
3692 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3695 *slot
= per_cu
->v
.quick
->file_names
;
3699 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3702 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3703 struct quick_file_names
*file_data
;
3706 /* We only need to look at symtabs not already expanded. */
3707 if (per_cu
->v
.quick
->symtab
)
3710 file_data
= dw2_get_file_names (objfile
, per_cu
);
3711 if (file_data
== NULL
)
3714 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3717 /* Already visited. */
3722 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3724 const char *this_real_name
;
3727 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3729 this_real_name
= NULL
;
3730 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3734 do_cleanups (cleanup
);
3738 dw2_has_symbols (struct objfile
*objfile
)
3743 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3746 dw2_find_last_source_symtab
,
3747 dw2_forget_cached_source_info
,
3748 dw2_map_symtabs_matching_filename
,
3753 dw2_expand_symtabs_for_function
,
3754 dw2_expand_all_symtabs
,
3755 dw2_expand_symtabs_with_filename
,
3756 dw2_find_symbol_file
,
3757 dw2_map_matching_symbols
,
3758 dw2_expand_symtabs_matching
,
3759 dw2_find_pc_sect_symtab
,
3760 dw2_map_symbol_filenames
3763 /* Initialize for reading DWARF for this objfile. Return 0 if this
3764 file will use psymtabs, or 1 if using the GNU index. */
3767 dwarf2_initialize_objfile (struct objfile
*objfile
)
3769 /* If we're about to read full symbols, don't bother with the
3770 indices. In this case we also don't care if some other debug
3771 format is making psymtabs, because they are all about to be
3773 if ((objfile
->flags
& OBJF_READNOW
))
3777 dwarf2_per_objfile
->using_index
= 1;
3778 create_all_comp_units (objfile
);
3779 create_all_type_units (objfile
);
3780 dwarf2_per_objfile
->quick_file_names_table
=
3781 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3783 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3784 + dwarf2_per_objfile
->n_type_units
); ++i
)
3786 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3788 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3789 struct dwarf2_per_cu_quick_data
);
3792 /* Return 1 so that gdb sees the "quick" functions. However,
3793 these functions will be no-ops because we will have expanded
3798 if (dwarf2_read_index (objfile
))
3806 /* Build a partial symbol table. */
3809 dwarf2_build_psymtabs (struct objfile
*objfile
)
3811 volatile struct gdb_exception except
;
3813 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3815 init_psymbol_list (objfile
, 1024);
3818 TRY_CATCH (except
, RETURN_MASK_ERROR
)
3820 /* This isn't really ideal: all the data we allocate on the
3821 objfile's obstack is still uselessly kept around. However,
3822 freeing it seems unsafe. */
3823 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
3825 dwarf2_build_psymtabs_hard (objfile
);
3826 discard_cleanups (cleanups
);
3828 if (except
.reason
< 0)
3829 exception_print (gdb_stderr
, except
);
3832 /* Return the total length of the CU described by HEADER. */
3835 get_cu_length (const struct comp_unit_head
*header
)
3837 return header
->initial_length_size
+ header
->length
;
3840 /* Return TRUE if OFFSET is within CU_HEADER. */
3843 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3845 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3846 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3848 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3851 /* Find the base address of the compilation unit for range lists and
3852 location lists. It will normally be specified by DW_AT_low_pc.
3853 In DWARF-3 draft 4, the base address could be overridden by
3854 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3855 compilation units with discontinuous ranges. */
3858 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3860 struct attribute
*attr
;
3863 cu
->base_address
= 0;
3865 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3868 cu
->base_address
= DW_ADDR (attr
);
3873 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3876 cu
->base_address
= DW_ADDR (attr
);
3882 /* Read in the comp unit header information from the debug_info at info_ptr.
3883 NOTE: This leaves members offset, first_die_offset to be filled in
3887 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3888 gdb_byte
*info_ptr
, bfd
*abfd
)
3891 unsigned int bytes_read
;
3893 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3894 cu_header
->initial_length_size
= bytes_read
;
3895 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3896 info_ptr
+= bytes_read
;
3897 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3899 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3901 info_ptr
+= bytes_read
;
3902 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3904 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3905 if (signed_addr
< 0)
3906 internal_error (__FILE__
, __LINE__
,
3907 _("read_comp_unit_head: dwarf from non elf file"));
3908 cu_header
->signed_addr_p
= signed_addr
;
3913 /* Helper function that returns the proper abbrev section for
3916 static struct dwarf2_section_info
*
3917 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3919 struct dwarf2_section_info
*abbrev
;
3921 if (this_cu
->is_dwz
)
3922 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3924 abbrev
= &dwarf2_per_objfile
->abbrev
;
3929 /* Subroutine of read_and_check_comp_unit_head and
3930 read_and_check_type_unit_head to simplify them.
3931 Perform various error checking on the header. */
3934 error_check_comp_unit_head (struct comp_unit_head
*header
,
3935 struct dwarf2_section_info
*section
,
3936 struct dwarf2_section_info
*abbrev_section
)
3938 bfd
*abfd
= section
->asection
->owner
;
3939 const char *filename
= bfd_get_filename (abfd
);
3941 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3942 error (_("Dwarf Error: wrong version in compilation unit header "
3943 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3946 if (header
->abbrev_offset
.sect_off
3947 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3948 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3949 "(offset 0x%lx + 6) [in module %s]"),
3950 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3953 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3954 avoid potential 32-bit overflow. */
3955 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3957 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3958 "(offset 0x%lx + 0) [in module %s]"),
3959 (long) header
->length
, (long) header
->offset
.sect_off
,
3963 /* Read in a CU/TU header and perform some basic error checking.
3964 The contents of the header are stored in HEADER.
3965 The result is a pointer to the start of the first DIE. */
3968 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3969 struct dwarf2_section_info
*section
,
3970 struct dwarf2_section_info
*abbrev_section
,
3972 int is_debug_types_section
)
3974 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3975 bfd
*abfd
= section
->asection
->owner
;
3977 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3979 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3981 /* If we're reading a type unit, skip over the signature and
3982 type_offset fields. */
3983 if (is_debug_types_section
)
3984 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3986 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3988 error_check_comp_unit_head (header
, section
, abbrev_section
);
3993 /* Read in the types comp unit header information from .debug_types entry at
3994 types_ptr. The result is a pointer to one past the end of the header. */
3997 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3998 struct dwarf2_section_info
*section
,
3999 struct dwarf2_section_info
*abbrev_section
,
4001 ULONGEST
*signature
,
4002 cu_offset
*type_offset_in_tu
)
4004 gdb_byte
*beg_of_comp_unit
= info_ptr
;
4005 bfd
*abfd
= section
->asection
->owner
;
4007 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4009 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4011 /* If we're reading a type unit, skip over the signature and
4012 type_offset fields. */
4013 if (signature
!= NULL
)
4014 *signature
= read_8_bytes (abfd
, info_ptr
);
4016 if (type_offset_in_tu
!= NULL
)
4017 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4018 header
->offset_size
);
4019 info_ptr
+= header
->offset_size
;
4021 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4023 error_check_comp_unit_head (header
, section
, abbrev_section
);
4028 /* Fetch the abbreviation table offset from a comp or type unit header. */
4031 read_abbrev_offset (struct dwarf2_section_info
*section
,
4034 bfd
*abfd
= section
->asection
->owner
;
4036 unsigned int length
, initial_length_size
, offset_size
;
4037 sect_offset abbrev_offset
;
4039 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4040 info_ptr
= section
->buffer
+ offset
.sect_off
;
4041 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4042 offset_size
= initial_length_size
== 4 ? 4 : 8;
4043 info_ptr
+= initial_length_size
+ 2 /*version*/;
4044 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4045 return abbrev_offset
;
4048 /* Allocate a new partial symtab for file named NAME and mark this new
4049 partial symtab as being an include of PST. */
4052 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
4053 struct objfile
*objfile
)
4055 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4057 subpst
->section_offsets
= pst
->section_offsets
;
4058 subpst
->textlow
= 0;
4059 subpst
->texthigh
= 0;
4061 subpst
->dependencies
= (struct partial_symtab
**)
4062 obstack_alloc (&objfile
->objfile_obstack
,
4063 sizeof (struct partial_symtab
*));
4064 subpst
->dependencies
[0] = pst
;
4065 subpst
->number_of_dependencies
= 1;
4067 subpst
->globals_offset
= 0;
4068 subpst
->n_global_syms
= 0;
4069 subpst
->statics_offset
= 0;
4070 subpst
->n_static_syms
= 0;
4071 subpst
->symtab
= NULL
;
4072 subpst
->read_symtab
= pst
->read_symtab
;
4075 /* No private part is necessary for include psymtabs. This property
4076 can be used to differentiate between such include psymtabs and
4077 the regular ones. */
4078 subpst
->read_symtab_private
= NULL
;
4081 /* Read the Line Number Program data and extract the list of files
4082 included by the source file represented by PST. Build an include
4083 partial symtab for each of these included files. */
4086 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4087 struct die_info
*die
,
4088 struct partial_symtab
*pst
)
4090 struct line_header
*lh
= NULL
;
4091 struct attribute
*attr
;
4093 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4095 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4097 return; /* No linetable, so no includes. */
4099 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4100 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
4102 free_line_header (lh
);
4106 hash_signatured_type (const void *item
)
4108 const struct signatured_type
*sig_type
= item
;
4110 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4111 return sig_type
->signature
;
4115 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4117 const struct signatured_type
*lhs
= item_lhs
;
4118 const struct signatured_type
*rhs
= item_rhs
;
4120 return lhs
->signature
== rhs
->signature
;
4123 /* Allocate a hash table for signatured types. */
4126 allocate_signatured_type_table (struct objfile
*objfile
)
4128 return htab_create_alloc_ex (41,
4129 hash_signatured_type
,
4132 &objfile
->objfile_obstack
,
4133 hashtab_obstack_allocate
,
4134 dummy_obstack_deallocate
);
4137 /* A helper function to add a signatured type CU to a table. */
4140 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4142 struct signatured_type
*sigt
= *slot
;
4143 struct signatured_type
***datap
= datum
;
4151 /* Create the hash table of all entries in the .debug_types section.
4152 DWO_FILE is a pointer to the DWO file for .debug_types.dwo,
4154 Note: This function processes DWO files only, not DWP files.
4155 The result is a pointer to the hash table or NULL if there are
4159 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4160 VEC (dwarf2_section_info_def
) *types
)
4162 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4163 htab_t types_htab
= NULL
;
4165 struct dwarf2_section_info
*section
;
4166 struct dwarf2_section_info
*abbrev_section
;
4168 if (VEC_empty (dwarf2_section_info_def
, types
))
4171 abbrev_section
= (dwo_file
!= NULL
4172 ? &dwo_file
->sections
.abbrev
4173 : &dwarf2_per_objfile
->abbrev
);
4175 if (dwarf2_read_debug
)
4176 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4177 dwo_file
? ".dwo" : "",
4178 bfd_get_filename (abbrev_section
->asection
->owner
));
4181 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4185 gdb_byte
*info_ptr
, *end_ptr
;
4186 struct dwarf2_section_info
*abbrev_section
;
4188 dwarf2_read_section (objfile
, section
);
4189 info_ptr
= section
->buffer
;
4191 if (info_ptr
== NULL
)
4194 /* We can't set abfd until now because the section may be empty or
4195 not present, in which case section->asection will be NULL. */
4196 abfd
= section
->asection
->owner
;
4199 abbrev_section
= &dwo_file
->sections
.abbrev
;
4201 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4203 if (types_htab
== NULL
)
4206 types_htab
= allocate_dwo_unit_table (objfile
);
4208 types_htab
= allocate_signatured_type_table (objfile
);
4211 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4212 because we don't need to read any dies: the signature is in the
4215 end_ptr
= info_ptr
+ section
->size
;
4216 while (info_ptr
< end_ptr
)
4219 cu_offset type_offset_in_tu
;
4221 struct signatured_type
*sig_type
;
4222 struct dwo_unit
*dwo_tu
;
4224 gdb_byte
*ptr
= info_ptr
;
4225 struct comp_unit_head header
;
4226 unsigned int length
;
4228 offset
.sect_off
= ptr
- section
->buffer
;
4230 /* We need to read the type's signature in order to build the hash
4231 table, but we don't need anything else just yet. */
4233 ptr
= read_and_check_type_unit_head (&header
, section
,
4234 abbrev_section
, ptr
,
4235 &signature
, &type_offset_in_tu
);
4237 length
= get_cu_length (&header
);
4239 /* Skip dummy type units. */
4240 if (ptr
>= info_ptr
+ length
4241 || peek_abbrev_code (abfd
, ptr
) == 0)
4250 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4252 dwo_tu
->dwo_file
= dwo_file
;
4253 dwo_tu
->signature
= signature
;
4254 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4255 dwo_tu
->info_or_types_section
= section
;
4256 dwo_tu
->offset
= offset
;
4257 dwo_tu
->length
= length
;
4261 /* N.B.: type_offset is not usable if this type uses a DWO file.
4262 The real type_offset is in the DWO file. */
4264 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4265 struct signatured_type
);
4266 sig_type
->signature
= signature
;
4267 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4268 sig_type
->per_cu
.objfile
= objfile
;
4269 sig_type
->per_cu
.is_debug_types
= 1;
4270 sig_type
->per_cu
.info_or_types_section
= section
;
4271 sig_type
->per_cu
.offset
= offset
;
4272 sig_type
->per_cu
.length
= length
;
4275 slot
= htab_find_slot (types_htab
,
4276 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4278 gdb_assert (slot
!= NULL
);
4281 sect_offset dup_offset
;
4285 const struct dwo_unit
*dup_tu
= *slot
;
4287 dup_offset
= dup_tu
->offset
;
4291 const struct signatured_type
*dup_tu
= *slot
;
4293 dup_offset
= dup_tu
->per_cu
.offset
;
4296 complaint (&symfile_complaints
,
4297 _("debug type entry at offset 0x%x is duplicate to the "
4298 "entry at offset 0x%x, signature 0x%s"),
4299 offset
.sect_off
, dup_offset
.sect_off
,
4300 phex (signature
, sizeof (signature
)));
4302 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4304 if (dwarf2_read_debug
)
4305 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4307 phex (signature
, sizeof (signature
)));
4316 /* Create the hash table of all entries in the .debug_types section,
4317 and initialize all_type_units.
4318 The result is zero if there is an error (e.g. missing .debug_types section),
4319 otherwise non-zero. */
4322 create_all_type_units (struct objfile
*objfile
)
4325 struct signatured_type
**iter
;
4327 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4328 if (types_htab
== NULL
)
4330 dwarf2_per_objfile
->signatured_types
= NULL
;
4334 dwarf2_per_objfile
->signatured_types
= types_htab
;
4336 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4337 dwarf2_per_objfile
->all_type_units
4338 = obstack_alloc (&objfile
->objfile_obstack
,
4339 dwarf2_per_objfile
->n_type_units
4340 * sizeof (struct signatured_type
*));
4341 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4342 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4343 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4344 == dwarf2_per_objfile
->n_type_units
);
4349 /* Lookup a signature based type for DW_FORM_ref_sig8.
4350 Returns NULL if signature SIG is not present in the table. */
4352 static struct signatured_type
*
4353 lookup_signatured_type (ULONGEST sig
)
4355 struct signatured_type find_entry
, *entry
;
4357 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4359 complaint (&symfile_complaints
,
4360 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4364 find_entry
.signature
= sig
;
4365 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4369 /* Low level DIE reading support. */
4371 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4374 init_cu_die_reader (struct die_reader_specs
*reader
,
4375 struct dwarf2_cu
*cu
,
4376 struct dwarf2_section_info
*section
,
4377 struct dwo_file
*dwo_file
)
4379 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4380 reader
->abfd
= section
->asection
->owner
;
4382 reader
->dwo_file
= dwo_file
;
4383 reader
->die_section
= section
;
4384 reader
->buffer
= section
->buffer
;
4385 reader
->buffer_end
= section
->buffer
+ section
->size
;
4388 /* Initialize a CU (or TU) and read its DIEs.
4389 If the CU defers to a DWO file, read the DWO file as well.
4391 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4392 Otherwise the table specified in the comp unit header is read in and used.
4393 This is an optimization for when we already have the abbrev table.
4395 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4396 Otherwise, a new CU is allocated with xmalloc.
4398 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4399 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4401 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4402 linker) then DIE_READER_FUNC will not get called. */
4405 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4406 struct abbrev_table
*abbrev_table
,
4407 int use_existing_cu
, int keep
,
4408 die_reader_func_ftype
*die_reader_func
,
4411 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4412 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4413 bfd
*abfd
= section
->asection
->owner
;
4414 struct dwarf2_cu
*cu
;
4415 gdb_byte
*begin_info_ptr
, *info_ptr
;
4416 struct die_reader_specs reader
;
4417 struct die_info
*comp_unit_die
;
4419 struct attribute
*attr
;
4420 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4421 struct signatured_type
*sig_type
= NULL
;
4422 struct dwarf2_section_info
*abbrev_section
;
4423 /* Non-zero if CU currently points to a DWO file and we need to
4424 reread it. When this happens we need to reread the skeleton die
4425 before we can reread the DWO file. */
4426 int rereading_dwo_cu
= 0;
4428 if (dwarf2_die_debug
)
4429 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4430 this_cu
->is_debug_types
? "type" : "comp",
4431 this_cu
->offset
.sect_off
);
4433 if (use_existing_cu
)
4436 cleanups
= make_cleanup (null_cleanup
, NULL
);
4438 /* This is cheap if the section is already read in. */
4439 dwarf2_read_section (objfile
, section
);
4441 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4443 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4445 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4449 /* If this CU is from a DWO file we need to start over, we need to
4450 refetch the attributes from the skeleton CU.
4451 This could be optimized by retrieving those attributes from when we
4452 were here the first time: the previous comp_unit_die was stored in
4453 comp_unit_obstack. But there's no data yet that we need this
4455 if (cu
->dwo_unit
!= NULL
)
4456 rereading_dwo_cu
= 1;
4460 /* If !use_existing_cu, this_cu->cu must be NULL. */
4461 gdb_assert (this_cu
->cu
== NULL
);
4463 cu
= xmalloc (sizeof (*cu
));
4464 init_one_comp_unit (cu
, this_cu
);
4466 /* If an error occurs while loading, release our storage. */
4467 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4470 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4472 /* We already have the header, there's no need to read it in again. */
4473 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4477 if (this_cu
->is_debug_types
)
4480 cu_offset type_offset_in_tu
;
4482 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4483 abbrev_section
, info_ptr
,
4485 &type_offset_in_tu
);
4487 /* Since per_cu is the first member of struct signatured_type,
4488 we can go from a pointer to one to a pointer to the other. */
4489 sig_type
= (struct signatured_type
*) this_cu
;
4490 gdb_assert (sig_type
->signature
== signature
);
4491 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4492 == type_offset_in_tu
.cu_off
);
4493 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4495 /* LENGTH has not been set yet for type units if we're
4496 using .gdb_index. */
4497 this_cu
->length
= get_cu_length (&cu
->header
);
4499 /* Establish the type offset that can be used to lookup the type. */
4500 sig_type
->type_offset_in_section
.sect_off
=
4501 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4505 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4509 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4510 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4514 /* Skip dummy compilation units. */
4515 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4516 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4518 do_cleanups (cleanups
);
4522 /* If we don't have them yet, read the abbrevs for this compilation unit.
4523 And if we need to read them now, make sure they're freed when we're
4524 done. Note that it's important that if the CU had an abbrev table
4525 on entry we don't free it when we're done: Somewhere up the call stack
4526 it may be in use. */
4527 if (abbrev_table
!= NULL
)
4529 gdb_assert (cu
->abbrev_table
== NULL
);
4530 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4531 == abbrev_table
->offset
.sect_off
);
4532 cu
->abbrev_table
= abbrev_table
;
4534 else if (cu
->abbrev_table
== NULL
)
4536 dwarf2_read_abbrevs (cu
, abbrev_section
);
4537 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4539 else if (rereading_dwo_cu
)
4541 dwarf2_free_abbrev_table (cu
);
4542 dwarf2_read_abbrevs (cu
, abbrev_section
);
4545 /* Read the top level CU/TU die. */
4546 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4547 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4549 /* If we have a DWO stub, process it and then read in the DWO file.
4550 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4551 a DWO CU, that this test will fail. */
4552 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4555 char *dwo_name
= DW_STRING (attr
);
4556 const char *comp_dir_string
;
4557 struct dwo_unit
*dwo_unit
;
4558 ULONGEST signature
; /* Or dwo_id. */
4559 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4560 int i
,num_extra_attrs
;
4561 struct dwarf2_section_info
*dwo_abbrev_section
;
4564 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4565 " has children (offset 0x%x) [in module %s]"),
4566 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4568 /* These attributes aren't processed until later:
4569 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4570 However, the attribute is found in the stub which we won't have later.
4571 In order to not impose this complication on the rest of the code,
4572 we read them here and copy them to the DWO CU/TU die. */
4574 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4577 if (! this_cu
->is_debug_types
)
4578 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4579 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4580 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4581 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4582 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4584 /* There should be a DW_AT_addr_base attribute here (if needed).
4585 We need the value before we can process DW_FORM_GNU_addr_index. */
4587 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4589 cu
->addr_base
= DW_UNSND (attr
);
4591 /* There should be a DW_AT_ranges_base attribute here (if needed).
4592 We need the value before we can process DW_AT_ranges. */
4593 cu
->ranges_base
= 0;
4594 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4596 cu
->ranges_base
= DW_UNSND (attr
);
4598 if (this_cu
->is_debug_types
)
4600 gdb_assert (sig_type
!= NULL
);
4601 signature
= sig_type
->signature
;
4605 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4607 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4609 signature
= DW_UNSND (attr
);
4612 /* We may need the comp_dir in order to find the DWO file. */
4613 comp_dir_string
= NULL
;
4615 comp_dir_string
= DW_STRING (comp_dir
);
4617 if (this_cu
->is_debug_types
)
4618 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4620 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4623 if (dwo_unit
== NULL
)
4625 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4626 " with ID %s [in module %s]"),
4627 this_cu
->offset
.sect_off
,
4628 phex (signature
, sizeof (signature
)),
4632 /* Set up for reading the DWO CU/TU. */
4633 cu
->dwo_unit
= dwo_unit
;
4634 section
= dwo_unit
->info_or_types_section
;
4635 dwarf2_read_section (objfile
, section
);
4636 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4637 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4638 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4640 if (this_cu
->is_debug_types
)
4643 cu_offset type_offset_in_tu
;
4645 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4649 &type_offset_in_tu
);
4650 gdb_assert (sig_type
->signature
== signature
);
4651 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4652 /* For DWOs coming from DWP files, we don't know the CU length
4653 nor the type's offset in the TU until now. */
4654 dwo_unit
->length
= get_cu_length (&cu
->header
);
4655 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
4657 /* Establish the type offset that can be used to lookup the type.
4658 For DWO files, we don't know it until now. */
4659 sig_type
->type_offset_in_section
.sect_off
=
4660 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4664 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4667 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4668 /* For DWOs coming from DWP files, we don't know the CU length
4670 dwo_unit
->length
= get_cu_length (&cu
->header
);
4673 /* Discard the original CU's abbrev table, and read the DWO's. */
4674 if (abbrev_table
== NULL
)
4676 dwarf2_free_abbrev_table (cu
);
4677 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4681 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4682 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4685 /* Read in the die, but leave space to copy over the attributes
4686 from the stub. This has the benefit of simplifying the rest of
4687 the code - all the real work is done here. */
4688 num_extra_attrs
= ((stmt_list
!= NULL
)
4692 + (comp_dir
!= NULL
));
4693 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4694 &has_children
, num_extra_attrs
);
4696 /* Copy over the attributes from the stub to the DWO die. */
4697 i
= comp_unit_die
->num_attrs
;
4698 if (stmt_list
!= NULL
)
4699 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4701 comp_unit_die
->attrs
[i
++] = *low_pc
;
4702 if (high_pc
!= NULL
)
4703 comp_unit_die
->attrs
[i
++] = *high_pc
;
4705 comp_unit_die
->attrs
[i
++] = *ranges
;
4706 if (comp_dir
!= NULL
)
4707 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4708 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4710 /* Skip dummy compilation units. */
4711 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4712 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4714 do_cleanups (cleanups
);
4719 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4721 if (free_cu_cleanup
!= NULL
)
4725 /* We've successfully allocated this compilation unit. Let our
4726 caller clean it up when finished with it. */
4727 discard_cleanups (free_cu_cleanup
);
4729 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4730 So we have to manually free the abbrev table. */
4731 dwarf2_free_abbrev_table (cu
);
4733 /* Link this CU into read_in_chain. */
4734 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4735 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4738 do_cleanups (free_cu_cleanup
);
4741 do_cleanups (cleanups
);
4744 /* Read CU/TU THIS_CU in section SECTION,
4745 but do not follow DW_AT_GNU_dwo_name if present.
4746 DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed
4747 to have already done the lookup to find the DWO/DWP file).
4749 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4750 THIS_CU->is_debug_types, but nothing else.
4752 We fill in THIS_CU->length.
4754 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4755 linker) then DIE_READER_FUNC will not get called.
4757 THIS_CU->cu is always freed when done.
4758 This is done in order to not leave THIS_CU->cu in a state where we have
4759 to care whether it refers to the "main" CU or the DWO CU. */
4762 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4763 struct dwarf2_section_info
*abbrev_section
,
4764 struct dwo_file
*dwo_file
,
4765 die_reader_func_ftype
*die_reader_func
,
4768 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4769 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4770 bfd
*abfd
= section
->asection
->owner
;
4771 struct dwarf2_cu cu
;
4772 gdb_byte
*begin_info_ptr
, *info_ptr
;
4773 struct die_reader_specs reader
;
4774 struct cleanup
*cleanups
;
4775 struct die_info
*comp_unit_die
;
4778 if (dwarf2_die_debug
)
4779 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4780 this_cu
->is_debug_types
? "type" : "comp",
4781 this_cu
->offset
.sect_off
);
4783 gdb_assert (this_cu
->cu
== NULL
);
4785 /* This is cheap if the section is already read in. */
4786 dwarf2_read_section (objfile
, section
);
4788 init_one_comp_unit (&cu
, this_cu
);
4790 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4792 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4793 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4794 abbrev_section
, info_ptr
,
4795 this_cu
->is_debug_types
);
4797 this_cu
->length
= get_cu_length (&cu
.header
);
4799 /* Skip dummy compilation units. */
4800 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4801 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4803 do_cleanups (cleanups
);
4807 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4808 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4810 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4811 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4813 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4815 do_cleanups (cleanups
);
4818 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4819 does not lookup the specified DWO file.
4820 This cannot be used to read DWO files.
4822 THIS_CU->cu is always freed when done.
4823 This is done in order to not leave THIS_CU->cu in a state where we have
4824 to care whether it refers to the "main" CU or the DWO CU.
4825 We can revisit this if the data shows there's a performance issue. */
4828 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4829 die_reader_func_ftype
*die_reader_func
,
4832 init_cutu_and_read_dies_no_follow (this_cu
,
4833 get_abbrev_section_for_cu (this_cu
),
4835 die_reader_func
, data
);
4838 /* Create a psymtab named NAME and assign it to PER_CU.
4840 The caller must fill in the following details:
4841 dirname, textlow, texthigh. */
4843 static struct partial_symtab
*
4844 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4846 struct objfile
*objfile
= per_cu
->objfile
;
4847 struct partial_symtab
*pst
;
4849 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4851 objfile
->global_psymbols
.next
,
4852 objfile
->static_psymbols
.next
);
4854 pst
->psymtabs_addrmap_supported
= 1;
4856 /* This is the glue that links PST into GDB's symbol API. */
4857 pst
->read_symtab_private
= per_cu
;
4858 pst
->read_symtab
= dwarf2_read_symtab
;
4859 per_cu
->v
.psymtab
= pst
;
4864 /* die_reader_func for process_psymtab_comp_unit. */
4867 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4869 struct die_info
*comp_unit_die
,
4873 struct dwarf2_cu
*cu
= reader
->cu
;
4874 struct objfile
*objfile
= cu
->objfile
;
4875 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4876 struct attribute
*attr
;
4878 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4879 struct partial_symtab
*pst
;
4881 const char *filename
;
4882 int *want_partial_unit_ptr
= data
;
4884 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4885 && (want_partial_unit_ptr
== NULL
4886 || !*want_partial_unit_ptr
))
4889 gdb_assert (! per_cu
->is_debug_types
);
4891 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4893 cu
->list_in_scope
= &file_symbols
;
4895 /* Allocate a new partial symbol table structure. */
4896 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4897 if (attr
== NULL
|| !DW_STRING (attr
))
4900 filename
= DW_STRING (attr
);
4902 pst
= create_partial_symtab (per_cu
, filename
);
4904 /* This must be done before calling dwarf2_build_include_psymtabs. */
4905 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4907 pst
->dirname
= DW_STRING (attr
);
4909 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4911 dwarf2_find_base_address (comp_unit_die
, cu
);
4913 /* Possibly set the default values of LOWPC and HIGHPC from
4915 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4916 &best_highpc
, cu
, pst
);
4917 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4918 /* Store the contiguous range if it is not empty; it can be empty for
4919 CUs with no code. */
4920 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4921 best_lowpc
+ baseaddr
,
4922 best_highpc
+ baseaddr
- 1, pst
);
4924 /* Check if comp unit has_children.
4925 If so, read the rest of the partial symbols from this comp unit.
4926 If not, there's no more debug_info for this comp unit. */
4929 struct partial_die_info
*first_die
;
4930 CORE_ADDR lowpc
, highpc
;
4932 lowpc
= ((CORE_ADDR
) -1);
4933 highpc
= ((CORE_ADDR
) 0);
4935 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4937 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4940 /* If we didn't find a lowpc, set it to highpc to avoid
4941 complaints from `maint check'. */
4942 if (lowpc
== ((CORE_ADDR
) -1))
4945 /* If the compilation unit didn't have an explicit address range,
4946 then use the information extracted from its child dies. */
4950 best_highpc
= highpc
;
4953 pst
->textlow
= best_lowpc
+ baseaddr
;
4954 pst
->texthigh
= best_highpc
+ baseaddr
;
4956 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4957 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4958 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4959 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4960 sort_pst_symbols (objfile
, pst
);
4962 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
))
4965 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4966 struct dwarf2_per_cu_data
*iter
;
4968 /* Fill in 'dependencies' here; we fill in 'users' in a
4970 pst
->number_of_dependencies
= len
;
4971 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4972 len
* sizeof (struct symtab
*));
4974 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
4977 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4979 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4982 /* Get the list of files included in the current compilation unit,
4983 and build a psymtab for each of them. */
4984 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4986 if (dwarf2_read_debug
)
4988 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4990 fprintf_unfiltered (gdb_stdlog
,
4991 "Psymtab for %s unit @0x%x: %s - %s"
4992 ", %d global, %d static syms\n",
4993 per_cu
->is_debug_types
? "type" : "comp",
4994 per_cu
->offset
.sect_off
,
4995 paddress (gdbarch
, pst
->textlow
),
4996 paddress (gdbarch
, pst
->texthigh
),
4997 pst
->n_global_syms
, pst
->n_static_syms
);
5001 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5002 Process compilation unit THIS_CU for a psymtab. */
5005 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5006 int want_partial_unit
)
5008 /* If this compilation unit was already read in, free the
5009 cached copy in order to read it in again. This is
5010 necessary because we skipped some symbols when we first
5011 read in the compilation unit (see load_partial_dies).
5012 This problem could be avoided, but the benefit is unclear. */
5013 if (this_cu
->cu
!= NULL
)
5014 free_one_cached_comp_unit (this_cu
);
5016 gdb_assert (! this_cu
->is_debug_types
);
5017 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
5018 process_psymtab_comp_unit_reader
,
5019 &want_partial_unit
);
5021 /* Age out any secondary CUs. */
5022 age_cached_comp_units ();
5026 hash_type_unit_group (const void *item
)
5028 const struct type_unit_group
*tu_group
= item
;
5030 return hash_stmt_list_entry (&tu_group
->hash
);
5034 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5036 const struct type_unit_group
*lhs
= item_lhs
;
5037 const struct type_unit_group
*rhs
= item_rhs
;
5039 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5042 /* Allocate a hash table for type unit groups. */
5045 allocate_type_unit_groups_table (void)
5047 return htab_create_alloc_ex (3,
5048 hash_type_unit_group
,
5051 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5052 hashtab_obstack_allocate
,
5053 dummy_obstack_deallocate
);
5056 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5057 partial symtabs. We combine several TUs per psymtab to not let the size
5058 of any one psymtab grow too big. */
5059 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5060 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5062 /* Helper routine for get_type_unit_group.
5063 Create the type_unit_group object used to hold one or more TUs. */
5065 static struct type_unit_group
*
5066 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5068 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5069 struct dwarf2_per_cu_data
*per_cu
;
5070 struct type_unit_group
*tu_group
;
5072 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5073 struct type_unit_group
);
5074 per_cu
= &tu_group
->per_cu
;
5075 per_cu
->objfile
= objfile
;
5076 per_cu
->is_debug_types
= 1;
5077 per_cu
->s
.type_unit_group
= tu_group
;
5079 if (dwarf2_per_objfile
->using_index
)
5081 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5082 struct dwarf2_per_cu_quick_data
);
5083 tu_group
->t
.first_tu
= cu
->per_cu
;
5087 unsigned int line_offset
= line_offset_struct
.sect_off
;
5088 struct partial_symtab
*pst
;
5091 /* Give the symtab a useful name for debug purposes. */
5092 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5093 name
= xstrprintf ("<type_units_%d>",
5094 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5096 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5098 pst
= create_partial_symtab (per_cu
, name
);
5104 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5105 tu_group
->hash
.line_offset
= line_offset_struct
;
5110 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5111 STMT_LIST is a DW_AT_stmt_list attribute. */
5113 static struct type_unit_group
*
5114 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
5116 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5117 struct type_unit_group
*tu_group
;
5119 unsigned int line_offset
;
5120 struct type_unit_group type_unit_group_for_lookup
;
5122 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5124 dwarf2_per_objfile
->type_unit_groups
=
5125 allocate_type_unit_groups_table ();
5128 /* Do we need to create a new group, or can we use an existing one? */
5132 line_offset
= DW_UNSND (stmt_list
);
5133 ++tu_stats
->nr_symtab_sharers
;
5137 /* Ugh, no stmt_list. Rare, but we have to handle it.
5138 We can do various things here like create one group per TU or
5139 spread them over multiple groups to split up the expansion work.
5140 To avoid worst case scenarios (too many groups or too large groups)
5141 we, umm, group them in bunches. */
5142 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5143 | (tu_stats
->nr_stmt_less_type_units
5144 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5145 ++tu_stats
->nr_stmt_less_type_units
;
5148 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5149 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5150 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5151 &type_unit_group_for_lookup
, INSERT
);
5155 gdb_assert (tu_group
!= NULL
);
5159 sect_offset line_offset_struct
;
5161 line_offset_struct
.sect_off
= line_offset
;
5162 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5164 ++tu_stats
->nr_symtabs
;
5170 /* Struct used to sort TUs by their abbreviation table offset. */
5172 struct tu_abbrev_offset
5174 struct signatured_type
*sig_type
;
5175 sect_offset abbrev_offset
;
5178 /* Helper routine for build_type_unit_groups, passed to qsort. */
5181 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5183 const struct tu_abbrev_offset
* const *a
= ap
;
5184 const struct tu_abbrev_offset
* const *b
= bp
;
5185 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5186 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5188 return (aoff
> boff
) - (aoff
< boff
);
5191 /* A helper function to add a type_unit_group to a table. */
5194 add_type_unit_group_to_table (void **slot
, void *datum
)
5196 struct type_unit_group
*tu_group
= *slot
;
5197 struct type_unit_group
***datap
= datum
;
5205 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5206 each one passing FUNC,DATA.
5208 The efficiency is because we sort TUs by the abbrev table they use and
5209 only read each abbrev table once. In one program there are 200K TUs
5210 sharing 8K abbrev tables.
5212 The main purpose of this function is to support building the
5213 dwarf2_per_objfile->type_unit_groups table.
5214 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5215 can collapse the search space by grouping them by stmt_list.
5216 The savings can be significant, in the same program from above the 200K TUs
5217 share 8K stmt_list tables.
5219 FUNC is expected to call get_type_unit_group, which will create the
5220 struct type_unit_group if necessary and add it to
5221 dwarf2_per_objfile->type_unit_groups. */
5224 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5226 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5227 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5228 struct cleanup
*cleanups
;
5229 struct abbrev_table
*abbrev_table
;
5230 sect_offset abbrev_offset
;
5231 struct tu_abbrev_offset
*sorted_by_abbrev
;
5232 struct type_unit_group
**iter
;
5235 /* It's up to the caller to not call us multiple times. */
5236 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5238 if (dwarf2_per_objfile
->n_type_units
== 0)
5241 /* TUs typically share abbrev tables, and there can be way more TUs than
5242 abbrev tables. Sort by abbrev table to reduce the number of times we
5243 read each abbrev table in.
5244 Alternatives are to punt or to maintain a cache of abbrev tables.
5245 This is simpler and efficient enough for now.
5247 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5248 symtab to use). Typically TUs with the same abbrev offset have the same
5249 stmt_list value too so in practice this should work well.
5251 The basic algorithm here is:
5253 sort TUs by abbrev table
5254 for each TU with same abbrev table:
5255 read abbrev table if first user
5256 read TU top level DIE
5257 [IWBN if DWO skeletons had DW_AT_stmt_list]
5260 if (dwarf2_read_debug
)
5261 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5263 /* Sort in a separate table to maintain the order of all_type_units
5264 for .gdb_index: TU indices directly index all_type_units. */
5265 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5266 dwarf2_per_objfile
->n_type_units
);
5267 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5269 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5271 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5272 sorted_by_abbrev
[i
].abbrev_offset
=
5273 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5274 sig_type
->per_cu
.offset
);
5276 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5277 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5278 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5280 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5281 called any number of times, so we don't reset tu_stats here. */
5283 abbrev_offset
.sect_off
= ~(unsigned) 0;
5284 abbrev_table
= NULL
;
5285 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5287 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5289 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5291 /* Switch to the next abbrev table if necessary. */
5292 if (abbrev_table
== NULL
5293 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5295 if (abbrev_table
!= NULL
)
5297 abbrev_table_free (abbrev_table
);
5298 /* Reset to NULL in case abbrev_table_read_table throws
5299 an error: abbrev_table_free_cleanup will get called. */
5300 abbrev_table
= NULL
;
5302 abbrev_offset
= tu
->abbrev_offset
;
5304 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5306 ++tu_stats
->nr_uniq_abbrev_tables
;
5309 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5313 /* Create a vector of pointers to primary type units to make it easy to
5314 iterate over them and CUs. See dw2_get_primary_cu. */
5315 dwarf2_per_objfile
->n_type_unit_groups
=
5316 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5317 dwarf2_per_objfile
->all_type_unit_groups
=
5318 obstack_alloc (&objfile
->objfile_obstack
,
5319 dwarf2_per_objfile
->n_type_unit_groups
5320 * sizeof (struct type_unit_group
*));
5321 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5322 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5323 add_type_unit_group_to_table
, &iter
);
5324 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5325 == dwarf2_per_objfile
->n_type_unit_groups
);
5327 do_cleanups (cleanups
);
5329 if (dwarf2_read_debug
)
5331 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5332 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5333 dwarf2_per_objfile
->n_type_units
);
5334 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5335 tu_stats
->nr_uniq_abbrev_tables
);
5336 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5337 tu_stats
->nr_symtabs
);
5338 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5339 tu_stats
->nr_symtab_sharers
);
5340 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5341 tu_stats
->nr_stmt_less_type_units
);
5345 /* Reader function for build_type_psymtabs. */
5348 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5350 struct die_info
*type_unit_die
,
5354 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5355 struct dwarf2_cu
*cu
= reader
->cu
;
5356 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5357 struct type_unit_group
*tu_group
;
5358 struct attribute
*attr
;
5359 struct partial_die_info
*first_die
;
5360 CORE_ADDR lowpc
, highpc
;
5361 struct partial_symtab
*pst
;
5363 gdb_assert (data
== NULL
);
5368 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5369 tu_group
= get_type_unit_group (cu
, attr
);
5371 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5373 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5374 cu
->list_in_scope
= &file_symbols
;
5375 pst
= create_partial_symtab (per_cu
, "");
5378 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5380 lowpc
= (CORE_ADDR
) -1;
5381 highpc
= (CORE_ADDR
) 0;
5382 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5384 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5385 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5386 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5387 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5388 sort_pst_symbols (objfile
, pst
);
5391 /* Traversal function for build_type_psymtabs. */
5394 build_type_psymtab_dependencies (void **slot
, void *info
)
5396 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5397 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5398 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5399 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5400 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5401 struct dwarf2_per_cu_data
*iter
;
5404 gdb_assert (len
> 0);
5406 pst
->number_of_dependencies
= len
;
5407 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5408 len
* sizeof (struct psymtab
*));
5410 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5413 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5414 iter
->s
.type_unit_group
= tu_group
;
5417 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5422 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5423 Build partial symbol tables for the .debug_types comp-units. */
5426 build_type_psymtabs (struct objfile
*objfile
)
5428 if (! create_all_type_units (objfile
))
5431 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5433 /* Now that all TUs have been processed we can fill in the dependencies. */
5434 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5435 build_type_psymtab_dependencies
, NULL
);
5438 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5441 psymtabs_addrmap_cleanup (void *o
)
5443 struct objfile
*objfile
= o
;
5445 objfile
->psymtabs_addrmap
= NULL
;
5448 /* Compute the 'user' field for each psymtab in OBJFILE. */
5451 set_partial_user (struct objfile
*objfile
)
5455 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5457 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5458 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5464 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5466 /* Set the 'user' field only if it is not already set. */
5467 if (pst
->dependencies
[j
]->user
== NULL
)
5468 pst
->dependencies
[j
]->user
= pst
;
5473 /* Build the partial symbol table by doing a quick pass through the
5474 .debug_info and .debug_abbrev sections. */
5477 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5479 struct cleanup
*back_to
, *addrmap_cleanup
;
5480 struct obstack temp_obstack
;
5483 if (dwarf2_read_debug
)
5485 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5489 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5491 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5493 /* Any cached compilation units will be linked by the per-objfile
5494 read_in_chain. Make sure to free them when we're done. */
5495 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5497 build_type_psymtabs (objfile
);
5499 create_all_comp_units (objfile
);
5501 /* Create a temporary address map on a temporary obstack. We later
5502 copy this to the final obstack. */
5503 obstack_init (&temp_obstack
);
5504 make_cleanup_obstack_free (&temp_obstack
);
5505 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5506 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5508 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5510 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5512 process_psymtab_comp_unit (per_cu
, 0);
5515 set_partial_user (objfile
);
5517 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5518 &objfile
->objfile_obstack
);
5519 discard_cleanups (addrmap_cleanup
);
5521 do_cleanups (back_to
);
5523 if (dwarf2_read_debug
)
5524 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5528 /* die_reader_func for load_partial_comp_unit. */
5531 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5533 struct die_info
*comp_unit_die
,
5537 struct dwarf2_cu
*cu
= reader
->cu
;
5539 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5541 /* Check if comp unit has_children.
5542 If so, read the rest of the partial symbols from this comp unit.
5543 If not, there's no more debug_info for this comp unit. */
5545 load_partial_dies (reader
, info_ptr
, 0);
5548 /* Load the partial DIEs for a secondary CU into memory.
5549 This is also used when rereading a primary CU with load_all_dies. */
5552 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5554 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5555 load_partial_comp_unit_reader
, NULL
);
5559 read_comp_units_from_section (struct objfile
*objfile
,
5560 struct dwarf2_section_info
*section
,
5561 unsigned int is_dwz
,
5564 struct dwarf2_per_cu_data
***all_comp_units
)
5567 bfd
*abfd
= section
->asection
->owner
;
5569 dwarf2_read_section (objfile
, section
);
5571 info_ptr
= section
->buffer
;
5573 while (info_ptr
< section
->buffer
+ section
->size
)
5575 unsigned int length
, initial_length_size
;
5576 struct dwarf2_per_cu_data
*this_cu
;
5579 offset
.sect_off
= info_ptr
- section
->buffer
;
5581 /* Read just enough information to find out where the next
5582 compilation unit is. */
5583 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5585 /* Save the compilation unit for later lookup. */
5586 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5587 sizeof (struct dwarf2_per_cu_data
));
5588 memset (this_cu
, 0, sizeof (*this_cu
));
5589 this_cu
->offset
= offset
;
5590 this_cu
->length
= length
+ initial_length_size
;
5591 this_cu
->is_dwz
= is_dwz
;
5592 this_cu
->objfile
= objfile
;
5593 this_cu
->info_or_types_section
= section
;
5595 if (*n_comp_units
== *n_allocated
)
5598 *all_comp_units
= xrealloc (*all_comp_units
,
5600 * sizeof (struct dwarf2_per_cu_data
*));
5602 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5605 info_ptr
= info_ptr
+ this_cu
->length
;
5609 /* Create a list of all compilation units in OBJFILE.
5610 This is only done for -readnow and building partial symtabs. */
5613 create_all_comp_units (struct objfile
*objfile
)
5617 struct dwarf2_per_cu_data
**all_comp_units
;
5621 all_comp_units
= xmalloc (n_allocated
5622 * sizeof (struct dwarf2_per_cu_data
*));
5624 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5625 &n_allocated
, &n_comp_units
, &all_comp_units
);
5627 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5629 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5631 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5632 &n_allocated
, &n_comp_units
,
5636 dwarf2_per_objfile
->all_comp_units
5637 = obstack_alloc (&objfile
->objfile_obstack
,
5638 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5639 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5640 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5641 xfree (all_comp_units
);
5642 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5645 /* Process all loaded DIEs for compilation unit CU, starting at
5646 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5647 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5648 DW_AT_ranges). If NEED_PC is set, then this function will set
5649 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5650 and record the covered ranges in the addrmap. */
5653 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5654 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5656 struct partial_die_info
*pdi
;
5658 /* Now, march along the PDI's, descending into ones which have
5659 interesting children but skipping the children of the other ones,
5660 until we reach the end of the compilation unit. */
5666 fixup_partial_die (pdi
, cu
);
5668 /* Anonymous namespaces or modules have no name but have interesting
5669 children, so we need to look at them. Ditto for anonymous
5672 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5673 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5674 || pdi
->tag
== DW_TAG_imported_unit
)
5678 case DW_TAG_subprogram
:
5679 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5681 case DW_TAG_constant
:
5682 case DW_TAG_variable
:
5683 case DW_TAG_typedef
:
5684 case DW_TAG_union_type
:
5685 if (!pdi
->is_declaration
)
5687 add_partial_symbol (pdi
, cu
);
5690 case DW_TAG_class_type
:
5691 case DW_TAG_interface_type
:
5692 case DW_TAG_structure_type
:
5693 if (!pdi
->is_declaration
)
5695 add_partial_symbol (pdi
, cu
);
5698 case DW_TAG_enumeration_type
:
5699 if (!pdi
->is_declaration
)
5700 add_partial_enumeration (pdi
, cu
);
5702 case DW_TAG_base_type
:
5703 case DW_TAG_subrange_type
:
5704 /* File scope base type definitions are added to the partial
5706 add_partial_symbol (pdi
, cu
);
5708 case DW_TAG_namespace
:
5709 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5712 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5714 case DW_TAG_imported_unit
:
5716 struct dwarf2_per_cu_data
*per_cu
;
5718 /* For now we don't handle imported units in type units. */
5719 if (cu
->per_cu
->is_debug_types
)
5721 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5722 " supported in type units [in module %s]"),
5726 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5730 /* Go read the partial unit, if needed. */
5731 if (per_cu
->v
.psymtab
== NULL
)
5732 process_psymtab_comp_unit (per_cu
, 1);
5734 VEC_safe_push (dwarf2_per_cu_ptr
,
5735 cu
->per_cu
->s
.imported_symtabs
, per_cu
);
5743 /* If the die has a sibling, skip to the sibling. */
5745 pdi
= pdi
->die_sibling
;
5749 /* Functions used to compute the fully scoped name of a partial DIE.
5751 Normally, this is simple. For C++, the parent DIE's fully scoped
5752 name is concatenated with "::" and the partial DIE's name. For
5753 Java, the same thing occurs except that "." is used instead of "::".
5754 Enumerators are an exception; they use the scope of their parent
5755 enumeration type, i.e. the name of the enumeration type is not
5756 prepended to the enumerator.
5758 There are two complexities. One is DW_AT_specification; in this
5759 case "parent" means the parent of the target of the specification,
5760 instead of the direct parent of the DIE. The other is compilers
5761 which do not emit DW_TAG_namespace; in this case we try to guess
5762 the fully qualified name of structure types from their members'
5763 linkage names. This must be done using the DIE's children rather
5764 than the children of any DW_AT_specification target. We only need
5765 to do this for structures at the top level, i.e. if the target of
5766 any DW_AT_specification (if any; otherwise the DIE itself) does not
5769 /* Compute the scope prefix associated with PDI's parent, in
5770 compilation unit CU. The result will be allocated on CU's
5771 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5772 field. NULL is returned if no prefix is necessary. */
5774 partial_die_parent_scope (struct partial_die_info
*pdi
,
5775 struct dwarf2_cu
*cu
)
5777 char *grandparent_scope
;
5778 struct partial_die_info
*parent
, *real_pdi
;
5780 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5781 then this means the parent of the specification DIE. */
5784 while (real_pdi
->has_specification
)
5785 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5786 real_pdi
->spec_is_dwz
, cu
);
5788 parent
= real_pdi
->die_parent
;
5792 if (parent
->scope_set
)
5793 return parent
->scope
;
5795 fixup_partial_die (parent
, cu
);
5797 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5799 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5800 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5801 Work around this problem here. */
5802 if (cu
->language
== language_cplus
5803 && parent
->tag
== DW_TAG_namespace
5804 && strcmp (parent
->name
, "::") == 0
5805 && grandparent_scope
== NULL
)
5807 parent
->scope
= NULL
;
5808 parent
->scope_set
= 1;
5812 if (pdi
->tag
== DW_TAG_enumerator
)
5813 /* Enumerators should not get the name of the enumeration as a prefix. */
5814 parent
->scope
= grandparent_scope
;
5815 else if (parent
->tag
== DW_TAG_namespace
5816 || parent
->tag
== DW_TAG_module
5817 || parent
->tag
== DW_TAG_structure_type
5818 || parent
->tag
== DW_TAG_class_type
5819 || parent
->tag
== DW_TAG_interface_type
5820 || parent
->tag
== DW_TAG_union_type
5821 || parent
->tag
== DW_TAG_enumeration_type
)
5823 if (grandparent_scope
== NULL
)
5824 parent
->scope
= parent
->name
;
5826 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5828 parent
->name
, 0, cu
);
5832 /* FIXME drow/2004-04-01: What should we be doing with
5833 function-local names? For partial symbols, we should probably be
5835 complaint (&symfile_complaints
,
5836 _("unhandled containing DIE tag %d for DIE at %d"),
5837 parent
->tag
, pdi
->offset
.sect_off
);
5838 parent
->scope
= grandparent_scope
;
5841 parent
->scope_set
= 1;
5842 return parent
->scope
;
5845 /* Return the fully scoped name associated with PDI, from compilation unit
5846 CU. The result will be allocated with malloc. */
5849 partial_die_full_name (struct partial_die_info
*pdi
,
5850 struct dwarf2_cu
*cu
)
5854 /* If this is a template instantiation, we can not work out the
5855 template arguments from partial DIEs. So, unfortunately, we have
5856 to go through the full DIEs. At least any work we do building
5857 types here will be reused if full symbols are loaded later. */
5858 if (pdi
->has_template_arguments
)
5860 fixup_partial_die (pdi
, cu
);
5862 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5864 struct die_info
*die
;
5865 struct attribute attr
;
5866 struct dwarf2_cu
*ref_cu
= cu
;
5868 /* DW_FORM_ref_addr is using section offset. */
5870 attr
.form
= DW_FORM_ref_addr
;
5871 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5872 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5874 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5878 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5879 if (parent_scope
== NULL
)
5882 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5886 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5888 struct objfile
*objfile
= cu
->objfile
;
5890 char *actual_name
= NULL
;
5892 int built_actual_name
= 0;
5894 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5896 actual_name
= partial_die_full_name (pdi
, cu
);
5898 built_actual_name
= 1;
5900 if (actual_name
== NULL
)
5901 actual_name
= pdi
->name
;
5905 case DW_TAG_subprogram
:
5906 if (pdi
->is_external
|| cu
->language
== language_ada
)
5908 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5909 of the global scope. But in Ada, we want to be able to access
5910 nested procedures globally. So all Ada subprograms are stored
5911 in the global scope. */
5912 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5913 mst_text, objfile); */
5914 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5916 VAR_DOMAIN
, LOC_BLOCK
,
5917 &objfile
->global_psymbols
,
5918 0, pdi
->lowpc
+ baseaddr
,
5919 cu
->language
, objfile
);
5923 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5924 mst_file_text, objfile); */
5925 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5927 VAR_DOMAIN
, LOC_BLOCK
,
5928 &objfile
->static_psymbols
,
5929 0, pdi
->lowpc
+ baseaddr
,
5930 cu
->language
, objfile
);
5933 case DW_TAG_constant
:
5935 struct psymbol_allocation_list
*list
;
5937 if (pdi
->is_external
)
5938 list
= &objfile
->global_psymbols
;
5940 list
= &objfile
->static_psymbols
;
5941 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5942 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
5943 list
, 0, 0, cu
->language
, objfile
);
5946 case DW_TAG_variable
:
5948 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5952 && !dwarf2_per_objfile
->has_section_at_zero
)
5954 /* A global or static variable may also have been stripped
5955 out by the linker if unused, in which case its address
5956 will be nullified; do not add such variables into partial
5957 symbol table then. */
5959 else if (pdi
->is_external
)
5962 Don't enter into the minimal symbol tables as there is
5963 a minimal symbol table entry from the ELF symbols already.
5964 Enter into partial symbol table if it has a location
5965 descriptor or a type.
5966 If the location descriptor is missing, new_symbol will create
5967 a LOC_UNRESOLVED symbol, the address of the variable will then
5968 be determined from the minimal symbol table whenever the variable
5970 The address for the partial symbol table entry is not
5971 used by GDB, but it comes in handy for debugging partial symbol
5974 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5975 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5977 VAR_DOMAIN
, LOC_STATIC
,
5978 &objfile
->global_psymbols
,
5980 cu
->language
, objfile
);
5984 /* Static Variable. Skip symbols without location descriptors. */
5985 if (pdi
->d
.locdesc
== NULL
)
5987 if (built_actual_name
)
5988 xfree (actual_name
);
5991 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5992 mst_file_data, objfile); */
5993 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5995 VAR_DOMAIN
, LOC_STATIC
,
5996 &objfile
->static_psymbols
,
5998 cu
->language
, objfile
);
6001 case DW_TAG_typedef
:
6002 case DW_TAG_base_type
:
6003 case DW_TAG_subrange_type
:
6004 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6006 VAR_DOMAIN
, LOC_TYPEDEF
,
6007 &objfile
->static_psymbols
,
6008 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6010 case DW_TAG_namespace
:
6011 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6013 VAR_DOMAIN
, LOC_TYPEDEF
,
6014 &objfile
->global_psymbols
,
6015 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6017 case DW_TAG_class_type
:
6018 case DW_TAG_interface_type
:
6019 case DW_TAG_structure_type
:
6020 case DW_TAG_union_type
:
6021 case DW_TAG_enumeration_type
:
6022 /* Skip external references. The DWARF standard says in the section
6023 about "Structure, Union, and Class Type Entries": "An incomplete
6024 structure, union or class type is represented by a structure,
6025 union or class entry that does not have a byte size attribute
6026 and that has a DW_AT_declaration attribute." */
6027 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6029 if (built_actual_name
)
6030 xfree (actual_name
);
6034 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6035 static vs. global. */
6036 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6038 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6039 (cu
->language
== language_cplus
6040 || cu
->language
== language_java
)
6041 ? &objfile
->global_psymbols
6042 : &objfile
->static_psymbols
,
6043 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6046 case DW_TAG_enumerator
:
6047 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6049 VAR_DOMAIN
, LOC_CONST
,
6050 (cu
->language
== language_cplus
6051 || cu
->language
== language_java
)
6052 ? &objfile
->global_psymbols
6053 : &objfile
->static_psymbols
,
6054 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6060 if (built_actual_name
)
6061 xfree (actual_name
);
6064 /* Read a partial die corresponding to a namespace; also, add a symbol
6065 corresponding to that namespace to the symbol table. NAMESPACE is
6066 the name of the enclosing namespace. */
6069 add_partial_namespace (struct partial_die_info
*pdi
,
6070 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6071 int need_pc
, struct dwarf2_cu
*cu
)
6073 /* Add a symbol for the namespace. */
6075 add_partial_symbol (pdi
, cu
);
6077 /* Now scan partial symbols in that namespace. */
6079 if (pdi
->has_children
)
6080 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6083 /* Read a partial die corresponding to a Fortran module. */
6086 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
6087 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
6089 /* Now scan partial symbols in that module. */
6091 if (pdi
->has_children
)
6092 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
6095 /* Read a partial die corresponding to a subprogram and create a partial
6096 symbol for that subprogram. When the CU language allows it, this
6097 routine also defines a partial symbol for each nested subprogram
6098 that this subprogram contains.
6100 DIE my also be a lexical block, in which case we simply search
6101 recursively for suprograms defined inside that lexical block.
6102 Again, this is only performed when the CU language allows this
6103 type of definitions. */
6106 add_partial_subprogram (struct partial_die_info
*pdi
,
6107 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6108 int need_pc
, struct dwarf2_cu
*cu
)
6110 if (pdi
->tag
== DW_TAG_subprogram
)
6112 if (pdi
->has_pc_info
)
6114 if (pdi
->lowpc
< *lowpc
)
6115 *lowpc
= pdi
->lowpc
;
6116 if (pdi
->highpc
> *highpc
)
6117 *highpc
= pdi
->highpc
;
6121 struct objfile
*objfile
= cu
->objfile
;
6123 baseaddr
= ANOFFSET (objfile
->section_offsets
,
6124 SECT_OFF_TEXT (objfile
));
6125 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6126 pdi
->lowpc
+ baseaddr
,
6127 pdi
->highpc
- 1 + baseaddr
,
6128 cu
->per_cu
->v
.psymtab
);
6132 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6134 if (!pdi
->is_declaration
)
6135 /* Ignore subprogram DIEs that do not have a name, they are
6136 illegal. Do not emit a complaint at this point, we will
6137 do so when we convert this psymtab into a symtab. */
6139 add_partial_symbol (pdi
, cu
);
6143 if (! pdi
->has_children
)
6146 if (cu
->language
== language_ada
)
6148 pdi
= pdi
->die_child
;
6151 fixup_partial_die (pdi
, cu
);
6152 if (pdi
->tag
== DW_TAG_subprogram
6153 || pdi
->tag
== DW_TAG_lexical_block
)
6154 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6155 pdi
= pdi
->die_sibling
;
6160 /* Read a partial die corresponding to an enumeration type. */
6163 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6164 struct dwarf2_cu
*cu
)
6166 struct partial_die_info
*pdi
;
6168 if (enum_pdi
->name
!= NULL
)
6169 add_partial_symbol (enum_pdi
, cu
);
6171 pdi
= enum_pdi
->die_child
;
6174 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6175 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6177 add_partial_symbol (pdi
, cu
);
6178 pdi
= pdi
->die_sibling
;
6182 /* Return the initial uleb128 in the die at INFO_PTR. */
6185 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6187 unsigned int bytes_read
;
6189 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6192 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6193 Return the corresponding abbrev, or NULL if the number is zero (indicating
6194 an empty DIE). In either case *BYTES_READ will be set to the length of
6195 the initial number. */
6197 static struct abbrev_info
*
6198 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6199 struct dwarf2_cu
*cu
)
6201 bfd
*abfd
= cu
->objfile
->obfd
;
6202 unsigned int abbrev_number
;
6203 struct abbrev_info
*abbrev
;
6205 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6207 if (abbrev_number
== 0)
6210 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6213 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6214 abbrev_number
, bfd_get_filename (abfd
));
6220 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6221 Returns a pointer to the end of a series of DIEs, terminated by an empty
6222 DIE. Any children of the skipped DIEs will also be skipped. */
6225 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6227 struct dwarf2_cu
*cu
= reader
->cu
;
6228 struct abbrev_info
*abbrev
;
6229 unsigned int bytes_read
;
6233 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6235 return info_ptr
+ bytes_read
;
6237 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6241 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6242 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6243 abbrev corresponding to that skipped uleb128 should be passed in
6244 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6248 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6249 struct abbrev_info
*abbrev
)
6251 unsigned int bytes_read
;
6252 struct attribute attr
;
6253 bfd
*abfd
= reader
->abfd
;
6254 struct dwarf2_cu
*cu
= reader
->cu
;
6255 gdb_byte
*buffer
= reader
->buffer
;
6256 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6257 gdb_byte
*start_info_ptr
= info_ptr
;
6258 unsigned int form
, i
;
6260 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6262 /* The only abbrev we care about is DW_AT_sibling. */
6263 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6265 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6266 if (attr
.form
== DW_FORM_ref_addr
)
6267 complaint (&symfile_complaints
,
6268 _("ignoring absolute DW_AT_sibling"));
6270 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6273 /* If it isn't DW_AT_sibling, skip this attribute. */
6274 form
= abbrev
->attrs
[i
].form
;
6278 case DW_FORM_ref_addr
:
6279 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6280 and later it is offset sized. */
6281 if (cu
->header
.version
== 2)
6282 info_ptr
+= cu
->header
.addr_size
;
6284 info_ptr
+= cu
->header
.offset_size
;
6286 case DW_FORM_GNU_ref_alt
:
6287 info_ptr
+= cu
->header
.offset_size
;
6290 info_ptr
+= cu
->header
.addr_size
;
6297 case DW_FORM_flag_present
:
6309 case DW_FORM_ref_sig8
:
6312 case DW_FORM_string
:
6313 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6314 info_ptr
+= bytes_read
;
6316 case DW_FORM_sec_offset
:
6318 case DW_FORM_GNU_strp_alt
:
6319 info_ptr
+= cu
->header
.offset_size
;
6321 case DW_FORM_exprloc
:
6323 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6324 info_ptr
+= bytes_read
;
6326 case DW_FORM_block1
:
6327 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6329 case DW_FORM_block2
:
6330 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6332 case DW_FORM_block4
:
6333 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6337 case DW_FORM_ref_udata
:
6338 case DW_FORM_GNU_addr_index
:
6339 case DW_FORM_GNU_str_index
:
6340 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6342 case DW_FORM_indirect
:
6343 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6344 info_ptr
+= bytes_read
;
6345 /* We need to continue parsing from here, so just go back to
6347 goto skip_attribute
;
6350 error (_("Dwarf Error: Cannot handle %s "
6351 "in DWARF reader [in module %s]"),
6352 dwarf_form_name (form
),
6353 bfd_get_filename (abfd
));
6357 if (abbrev
->has_children
)
6358 return skip_children (reader
, info_ptr
);
6363 /* Locate ORIG_PDI's sibling.
6364 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6367 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6368 struct partial_die_info
*orig_pdi
,
6371 /* Do we know the sibling already? */
6373 if (orig_pdi
->sibling
)
6374 return orig_pdi
->sibling
;
6376 /* Are there any children to deal with? */
6378 if (!orig_pdi
->has_children
)
6381 /* Skip the children the long way. */
6383 return skip_children (reader
, info_ptr
);
6386 /* Expand this partial symbol table into a full symbol table. SELF is
6390 dwarf2_read_symtab (struct partial_symtab
*self
,
6391 struct objfile
*objfile
)
6395 warning (_("bug: psymtab for %s is already read in."),
6402 printf_filtered (_("Reading in symbols for %s..."),
6404 gdb_flush (gdb_stdout
);
6407 /* Restore our global data. */
6408 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
6410 /* If this psymtab is constructed from a debug-only objfile, the
6411 has_section_at_zero flag will not necessarily be correct. We
6412 can get the correct value for this flag by looking at the data
6413 associated with the (presumably stripped) associated objfile. */
6414 if (objfile
->separate_debug_objfile_backlink
)
6416 struct dwarf2_per_objfile
*dpo_backlink
6417 = objfile_data (objfile
->separate_debug_objfile_backlink
,
6418 dwarf2_objfile_data_key
);
6420 dwarf2_per_objfile
->has_section_at_zero
6421 = dpo_backlink
->has_section_at_zero
;
6424 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6426 psymtab_to_symtab_1 (self
);
6428 /* Finish up the debug error message. */
6430 printf_filtered (_("done.\n"));
6433 process_cu_includes ();
6436 /* Reading in full CUs. */
6438 /* Add PER_CU to the queue. */
6441 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6442 enum language pretend_language
)
6444 struct dwarf2_queue_item
*item
;
6447 item
= xmalloc (sizeof (*item
));
6448 item
->per_cu
= per_cu
;
6449 item
->pretend_language
= pretend_language
;
6452 if (dwarf2_queue
== NULL
)
6453 dwarf2_queue
= item
;
6455 dwarf2_queue_tail
->next
= item
;
6457 dwarf2_queue_tail
= item
;
6460 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6461 unit and add it to our queue.
6462 The result is non-zero if PER_CU was queued, otherwise the result is zero
6463 meaning either PER_CU is already queued or it is already loaded. */
6466 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6467 struct dwarf2_per_cu_data
*per_cu
,
6468 enum language pretend_language
)
6470 /* We may arrive here during partial symbol reading, if we need full
6471 DIEs to process an unusual case (e.g. template arguments). Do
6472 not queue PER_CU, just tell our caller to load its DIEs. */
6473 if (dwarf2_per_objfile
->reading_partial_symbols
)
6475 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6480 /* Mark the dependence relation so that we don't flush PER_CU
6482 dwarf2_add_dependence (this_cu
, per_cu
);
6484 /* If it's already on the queue, we have nothing to do. */
6488 /* If the compilation unit is already loaded, just mark it as
6490 if (per_cu
->cu
!= NULL
)
6492 per_cu
->cu
->last_used
= 0;
6496 /* Add it to the queue. */
6497 queue_comp_unit (per_cu
, pretend_language
);
6502 /* Process the queue. */
6505 process_queue (void)
6507 struct dwarf2_queue_item
*item
, *next_item
;
6509 if (dwarf2_read_debug
)
6511 fprintf_unfiltered (gdb_stdlog
,
6512 "Expanding one or more symtabs of objfile %s ...\n",
6513 dwarf2_per_objfile
->objfile
->name
);
6516 /* The queue starts out with one item, but following a DIE reference
6517 may load a new CU, adding it to the end of the queue. */
6518 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6520 if (dwarf2_per_objfile
->using_index
6521 ? !item
->per_cu
->v
.quick
->symtab
6522 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6524 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6526 if (dwarf2_read_debug
)
6528 fprintf_unfiltered (gdb_stdlog
,
6529 "Expanding symtab of %s at offset 0x%x\n",
6530 per_cu
->is_debug_types
? "TU" : "CU",
6531 per_cu
->offset
.sect_off
);
6534 if (per_cu
->is_debug_types
)
6535 process_full_type_unit (per_cu
, item
->pretend_language
);
6537 process_full_comp_unit (per_cu
, item
->pretend_language
);
6539 if (dwarf2_read_debug
)
6541 fprintf_unfiltered (gdb_stdlog
,
6542 "Done expanding %s at offset 0x%x\n",
6543 per_cu
->is_debug_types
? "TU" : "CU",
6544 per_cu
->offset
.sect_off
);
6548 item
->per_cu
->queued
= 0;
6549 next_item
= item
->next
;
6553 dwarf2_queue_tail
= NULL
;
6555 if (dwarf2_read_debug
)
6557 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6558 dwarf2_per_objfile
->objfile
->name
);
6562 /* Free all allocated queue entries. This function only releases anything if
6563 an error was thrown; if the queue was processed then it would have been
6564 freed as we went along. */
6567 dwarf2_release_queue (void *dummy
)
6569 struct dwarf2_queue_item
*item
, *last
;
6571 item
= dwarf2_queue
;
6574 /* Anything still marked queued is likely to be in an
6575 inconsistent state, so discard it. */
6576 if (item
->per_cu
->queued
)
6578 if (item
->per_cu
->cu
!= NULL
)
6579 free_one_cached_comp_unit (item
->per_cu
);
6580 item
->per_cu
->queued
= 0;
6588 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6591 /* Read in full symbols for PST, and anything it depends on. */
6594 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6596 struct dwarf2_per_cu_data
*per_cu
;
6602 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6603 if (!pst
->dependencies
[i
]->readin
6604 && pst
->dependencies
[i
]->user
== NULL
)
6606 /* Inform about additional files that need to be read in. */
6609 /* FIXME: i18n: Need to make this a single string. */
6610 fputs_filtered (" ", gdb_stdout
);
6612 fputs_filtered ("and ", gdb_stdout
);
6614 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6615 wrap_here (""); /* Flush output. */
6616 gdb_flush (gdb_stdout
);
6618 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6621 per_cu
= pst
->read_symtab_private
;
6625 /* It's an include file, no symbols to read for it.
6626 Everything is in the parent symtab. */
6631 dw2_do_instantiate_symtab (per_cu
);
6634 /* Trivial hash function for die_info: the hash value of a DIE
6635 is its offset in .debug_info for this objfile. */
6638 die_hash (const void *item
)
6640 const struct die_info
*die
= item
;
6642 return die
->offset
.sect_off
;
6645 /* Trivial comparison function for die_info structures: two DIEs
6646 are equal if they have the same offset. */
6649 die_eq (const void *item_lhs
, const void *item_rhs
)
6651 const struct die_info
*die_lhs
= item_lhs
;
6652 const struct die_info
*die_rhs
= item_rhs
;
6654 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6657 /* die_reader_func for load_full_comp_unit.
6658 This is identical to read_signatured_type_reader,
6659 but is kept separate for now. */
6662 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6664 struct die_info
*comp_unit_die
,
6668 struct dwarf2_cu
*cu
= reader
->cu
;
6669 enum language
*language_ptr
= data
;
6671 gdb_assert (cu
->die_hash
== NULL
);
6673 htab_create_alloc_ex (cu
->header
.length
/ 12,
6677 &cu
->comp_unit_obstack
,
6678 hashtab_obstack_allocate
,
6679 dummy_obstack_deallocate
);
6682 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6683 &info_ptr
, comp_unit_die
);
6684 cu
->dies
= comp_unit_die
;
6685 /* comp_unit_die is not stored in die_hash, no need. */
6687 /* We try not to read any attributes in this function, because not
6688 all CUs needed for references have been loaded yet, and symbol
6689 table processing isn't initialized. But we have to set the CU language,
6690 or we won't be able to build types correctly.
6691 Similarly, if we do not read the producer, we can not apply
6692 producer-specific interpretation. */
6693 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6696 /* Load the DIEs associated with PER_CU into memory. */
6699 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6700 enum language pretend_language
)
6702 gdb_assert (! this_cu
->is_debug_types
);
6704 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6705 load_full_comp_unit_reader
, &pretend_language
);
6708 /* Add a DIE to the delayed physname list. */
6711 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6712 const char *name
, struct die_info
*die
,
6713 struct dwarf2_cu
*cu
)
6715 struct delayed_method_info mi
;
6717 mi
.fnfield_index
= fnfield_index
;
6721 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6724 /* A cleanup for freeing the delayed method list. */
6727 free_delayed_list (void *ptr
)
6729 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6730 if (cu
->method_list
!= NULL
)
6732 VEC_free (delayed_method_info
, cu
->method_list
);
6733 cu
->method_list
= NULL
;
6737 /* Compute the physnames of any methods on the CU's method list.
6739 The computation of method physnames is delayed in order to avoid the
6740 (bad) condition that one of the method's formal parameters is of an as yet
6744 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6747 struct delayed_method_info
*mi
;
6748 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6750 const char *physname
;
6751 struct fn_fieldlist
*fn_flp
6752 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6753 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
6754 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6758 /* Go objects should be embedded in a DW_TAG_module DIE,
6759 and it's not clear if/how imported objects will appear.
6760 To keep Go support simple until that's worked out,
6761 go back through what we've read and create something usable.
6762 We could do this while processing each DIE, and feels kinda cleaner,
6763 but that way is more invasive.
6764 This is to, for example, allow the user to type "p var" or "b main"
6765 without having to specify the package name, and allow lookups
6766 of module.object to work in contexts that use the expression
6770 fixup_go_packaging (struct dwarf2_cu
*cu
)
6772 char *package_name
= NULL
;
6773 struct pending
*list
;
6776 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6778 for (i
= 0; i
< list
->nsyms
; ++i
)
6780 struct symbol
*sym
= list
->symbol
[i
];
6782 if (SYMBOL_LANGUAGE (sym
) == language_go
6783 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6785 char *this_package_name
= go_symbol_package_name (sym
);
6787 if (this_package_name
== NULL
)
6789 if (package_name
== NULL
)
6790 package_name
= this_package_name
;
6793 if (strcmp (package_name
, this_package_name
) != 0)
6794 complaint (&symfile_complaints
,
6795 _("Symtab %s has objects from two different Go packages: %s and %s"),
6796 (SYMBOL_SYMTAB (sym
)
6797 ? SYMBOL_SYMTAB (sym
)->filename
6798 : cu
->objfile
->name
),
6799 this_package_name
, package_name
);
6800 xfree (this_package_name
);
6806 if (package_name
!= NULL
)
6808 struct objfile
*objfile
= cu
->objfile
;
6809 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6810 package_name
, objfile
);
6813 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6815 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6816 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6817 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
6818 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6819 e.g., "main" finds the "main" module and not C's main(). */
6820 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6821 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6822 SYMBOL_TYPE (sym
) = type
;
6824 add_symbol_to_list (sym
, &global_symbols
);
6826 xfree (package_name
);
6830 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6832 /* Return the symtab for PER_CU. This works properly regardless of
6833 whether we're using the index or psymtabs. */
6835 static struct symtab
*
6836 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6838 return (dwarf2_per_objfile
->using_index
6839 ? per_cu
->v
.quick
->symtab
6840 : per_cu
->v
.psymtab
->symtab
);
6843 /* A helper function for computing the list of all symbol tables
6844 included by PER_CU. */
6847 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6848 htab_t all_children
,
6849 struct dwarf2_per_cu_data
*per_cu
)
6853 struct dwarf2_per_cu_data
*iter
;
6855 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6858 /* This inclusion and its children have been processed. */
6863 /* Only add a CU if it has a symbol table. */
6864 if (get_symtab (per_cu
) != NULL
)
6865 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6868 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6870 recursively_compute_inclusions (result
, all_children
, iter
);
6873 /* Compute the symtab 'includes' fields for the symtab related to
6877 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6879 gdb_assert (! per_cu
->is_debug_types
);
6881 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6884 struct dwarf2_per_cu_data
*iter
;
6885 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6886 htab_t all_children
;
6887 struct symtab
*symtab
= get_symtab (per_cu
);
6889 /* If we don't have a symtab, we can just skip this case. */
6893 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6894 NULL
, xcalloc
, xfree
);
6897 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6900 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6902 /* Now we have a transitive closure of all the included CUs, so
6903 we can convert it to a list of symtabs. */
6904 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6906 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6907 (len
+ 1) * sizeof (struct symtab
*));
6909 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6911 symtab
->includes
[ix
] = get_symtab (iter
);
6912 symtab
->includes
[len
] = NULL
;
6914 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6915 htab_delete (all_children
);
6919 /* Compute the 'includes' field for the symtabs of all the CUs we just
6923 process_cu_includes (void)
6926 struct dwarf2_per_cu_data
*iter
;
6929 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6933 if (! iter
->is_debug_types
)
6934 compute_symtab_includes (iter
);
6937 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6940 /* Generate full symbol information for PER_CU, whose DIEs have
6941 already been loaded into memory. */
6944 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6945 enum language pretend_language
)
6947 struct dwarf2_cu
*cu
= per_cu
->cu
;
6948 struct objfile
*objfile
= per_cu
->objfile
;
6949 CORE_ADDR lowpc
, highpc
;
6950 struct symtab
*symtab
;
6951 struct cleanup
*back_to
, *delayed_list_cleanup
;
6953 struct block
*static_block
;
6955 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6958 back_to
= make_cleanup (really_free_pendings
, NULL
);
6959 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6961 cu
->list_in_scope
= &file_symbols
;
6963 cu
->language
= pretend_language
;
6964 cu
->language_defn
= language_def (cu
->language
);
6966 /* Do line number decoding in read_file_scope () */
6967 process_die (cu
->dies
, cu
);
6969 /* For now fudge the Go package. */
6970 if (cu
->language
== language_go
)
6971 fixup_go_packaging (cu
);
6973 /* Now that we have processed all the DIEs in the CU, all the types
6974 should be complete, and it should now be safe to compute all of the
6976 compute_delayed_physnames (cu
);
6977 do_cleanups (delayed_list_cleanup
);
6979 /* Some compilers don't define a DW_AT_high_pc attribute for the
6980 compilation unit. If the DW_AT_high_pc is missing, synthesize
6981 it, by scanning the DIE's below the compilation unit. */
6982 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6985 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
6986 per_cu
->s
.imported_symtabs
!= NULL
);
6988 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
6989 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
6990 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
6991 addrmap to help ensure it has an accurate map of pc values belonging to
6993 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
6995 symtab
= end_symtab_from_static_block (static_block
, objfile
,
6996 SECT_OFF_TEXT (objfile
), 0);
7000 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7002 /* Set symtab language to language from DW_AT_language. If the
7003 compilation is from a C file generated by language preprocessors, do
7004 not set the language if it was already deduced by start_subfile. */
7005 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7006 symtab
->language
= cu
->language
;
7008 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
7009 produce DW_AT_location with location lists but it can be possibly
7010 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
7011 there were bugs in prologue debug info, fixed later in GCC-4.5
7012 by "unwind info for epilogues" patch (which is not directly related).
7014 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
7015 needed, it would be wrong due to missing DW_AT_producer there.
7017 Still one can confuse GDB by using non-standard GCC compilation
7018 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
7020 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
7021 symtab
->locations_valid
= 1;
7023 if (gcc_4_minor
>= 5)
7024 symtab
->epilogue_unwind_valid
= 1;
7026 symtab
->call_site_htab
= cu
->call_site_htab
;
7029 if (dwarf2_per_objfile
->using_index
)
7030 per_cu
->v
.quick
->symtab
= symtab
;
7033 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7034 pst
->symtab
= symtab
;
7038 /* Push it for inclusion processing later. */
7039 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
7041 do_cleanups (back_to
);
7044 /* Generate full symbol information for type unit PER_CU, whose DIEs have
7045 already been loaded into memory. */
7048 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
7049 enum language pretend_language
)
7051 struct dwarf2_cu
*cu
= per_cu
->cu
;
7052 struct objfile
*objfile
= per_cu
->objfile
;
7053 struct symtab
*symtab
;
7054 struct cleanup
*back_to
, *delayed_list_cleanup
;
7057 back_to
= make_cleanup (really_free_pendings
, NULL
);
7058 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7060 cu
->list_in_scope
= &file_symbols
;
7062 cu
->language
= pretend_language
;
7063 cu
->language_defn
= language_def (cu
->language
);
7065 /* The symbol tables are set up in read_type_unit_scope. */
7066 process_die (cu
->dies
, cu
);
7068 /* For now fudge the Go package. */
7069 if (cu
->language
== language_go
)
7070 fixup_go_packaging (cu
);
7072 /* Now that we have processed all the DIEs in the CU, all the types
7073 should be complete, and it should now be safe to compute all of the
7075 compute_delayed_physnames (cu
);
7076 do_cleanups (delayed_list_cleanup
);
7078 /* TUs share symbol tables.
7079 If this is the first TU to use this symtab, complete the construction
7080 of it with end_expandable_symtab. Otherwise, complete the addition of
7081 this TU's symbols to the existing symtab. */
7082 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
7084 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
7085 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
7089 /* Set symtab language to language from DW_AT_language. If the
7090 compilation is from a C file generated by language preprocessors,
7091 do not set the language if it was already deduced by
7093 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
7094 symtab
->language
= cu
->language
;
7099 augment_type_symtab (objfile
,
7100 per_cu
->s
.type_unit_group
->primary_symtab
);
7101 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
7104 if (dwarf2_per_objfile
->using_index
)
7105 per_cu
->v
.quick
->symtab
= symtab
;
7108 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7109 pst
->symtab
= symtab
;
7113 do_cleanups (back_to
);
7116 /* Process an imported unit DIE. */
7119 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7121 struct attribute
*attr
;
7123 /* For now we don't handle imported units in type units. */
7124 if (cu
->per_cu
->is_debug_types
)
7126 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7127 " supported in type units [in module %s]"),
7131 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7134 struct dwarf2_per_cu_data
*per_cu
;
7135 struct symtab
*imported_symtab
;
7139 offset
= dwarf2_get_ref_die_offset (attr
);
7140 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7141 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7143 /* Queue the unit, if needed. */
7144 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7145 load_full_comp_unit (per_cu
, cu
->language
);
7147 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
7152 /* Process a die and its children. */
7155 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7159 case DW_TAG_padding
:
7161 case DW_TAG_compile_unit
:
7162 case DW_TAG_partial_unit
:
7163 read_file_scope (die
, cu
);
7165 case DW_TAG_type_unit
:
7166 read_type_unit_scope (die
, cu
);
7168 case DW_TAG_subprogram
:
7169 case DW_TAG_inlined_subroutine
:
7170 read_func_scope (die
, cu
);
7172 case DW_TAG_lexical_block
:
7173 case DW_TAG_try_block
:
7174 case DW_TAG_catch_block
:
7175 read_lexical_block_scope (die
, cu
);
7177 case DW_TAG_GNU_call_site
:
7178 read_call_site_scope (die
, cu
);
7180 case DW_TAG_class_type
:
7181 case DW_TAG_interface_type
:
7182 case DW_TAG_structure_type
:
7183 case DW_TAG_union_type
:
7184 process_structure_scope (die
, cu
);
7186 case DW_TAG_enumeration_type
:
7187 process_enumeration_scope (die
, cu
);
7190 /* These dies have a type, but processing them does not create
7191 a symbol or recurse to process the children. Therefore we can
7192 read them on-demand through read_type_die. */
7193 case DW_TAG_subroutine_type
:
7194 case DW_TAG_set_type
:
7195 case DW_TAG_array_type
:
7196 case DW_TAG_pointer_type
:
7197 case DW_TAG_ptr_to_member_type
:
7198 case DW_TAG_reference_type
:
7199 case DW_TAG_string_type
:
7202 case DW_TAG_base_type
:
7203 case DW_TAG_subrange_type
:
7204 case DW_TAG_typedef
:
7205 /* Add a typedef symbol for the type definition, if it has a
7207 new_symbol (die
, read_type_die (die
, cu
), cu
);
7209 case DW_TAG_common_block
:
7210 read_common_block (die
, cu
);
7212 case DW_TAG_common_inclusion
:
7214 case DW_TAG_namespace
:
7215 processing_has_namespace_info
= 1;
7216 read_namespace (die
, cu
);
7219 processing_has_namespace_info
= 1;
7220 read_module (die
, cu
);
7222 case DW_TAG_imported_declaration
:
7223 case DW_TAG_imported_module
:
7224 processing_has_namespace_info
= 1;
7225 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7226 || cu
->language
!= language_fortran
))
7227 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7228 dwarf_tag_name (die
->tag
));
7229 read_import_statement (die
, cu
);
7232 case DW_TAG_imported_unit
:
7233 process_imported_unit_die (die
, cu
);
7237 new_symbol (die
, NULL
, cu
);
7242 /* A helper function for dwarf2_compute_name which determines whether DIE
7243 needs to have the name of the scope prepended to the name listed in the
7247 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7249 struct attribute
*attr
;
7253 case DW_TAG_namespace
:
7254 case DW_TAG_typedef
:
7255 case DW_TAG_class_type
:
7256 case DW_TAG_interface_type
:
7257 case DW_TAG_structure_type
:
7258 case DW_TAG_union_type
:
7259 case DW_TAG_enumeration_type
:
7260 case DW_TAG_enumerator
:
7261 case DW_TAG_subprogram
:
7265 case DW_TAG_variable
:
7266 case DW_TAG_constant
:
7267 /* We only need to prefix "globally" visible variables. These include
7268 any variable marked with DW_AT_external or any variable that
7269 lives in a namespace. [Variables in anonymous namespaces
7270 require prefixing, but they are not DW_AT_external.] */
7272 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7274 struct dwarf2_cu
*spec_cu
= cu
;
7276 return die_needs_namespace (die_specification (die
, &spec_cu
),
7280 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7281 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7282 && die
->parent
->tag
!= DW_TAG_module
)
7284 /* A variable in a lexical block of some kind does not need a
7285 namespace, even though in C++ such variables may be external
7286 and have a mangled name. */
7287 if (die
->parent
->tag
== DW_TAG_lexical_block
7288 || die
->parent
->tag
== DW_TAG_try_block
7289 || die
->parent
->tag
== DW_TAG_catch_block
7290 || die
->parent
->tag
== DW_TAG_subprogram
)
7299 /* Retrieve the last character from a mem_file. */
7302 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7304 char *last_char_p
= (char *) object
;
7307 *last_char_p
= buffer
[length
- 1];
7310 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7311 compute the physname for the object, which include a method's:
7312 - formal parameters (C++/Java),
7313 - receiver type (Go),
7314 - return type (Java).
7316 The term "physname" is a bit confusing.
7317 For C++, for example, it is the demangled name.
7318 For Go, for example, it's the mangled name.
7320 For Ada, return the DIE's linkage name rather than the fully qualified
7321 name. PHYSNAME is ignored..
7323 The result is allocated on the objfile_obstack and canonicalized. */
7326 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
7329 struct objfile
*objfile
= cu
->objfile
;
7332 name
= dwarf2_name (die
, cu
);
7334 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7335 compute it by typename_concat inside GDB. */
7336 if (cu
->language
== language_ada
7337 || (cu
->language
== language_fortran
&& physname
))
7339 /* For Ada unit, we prefer the linkage name over the name, as
7340 the former contains the exported name, which the user expects
7341 to be able to reference. Ideally, we want the user to be able
7342 to reference this entity using either natural or linkage name,
7343 but we haven't started looking at this enhancement yet. */
7344 struct attribute
*attr
;
7346 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7348 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7349 if (attr
&& DW_STRING (attr
))
7350 return DW_STRING (attr
);
7353 /* These are the only languages we know how to qualify names in. */
7355 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7356 || cu
->language
== language_fortran
))
7358 if (die_needs_namespace (die
, cu
))
7362 struct ui_file
*buf
;
7364 prefix
= determine_prefix (die
, cu
);
7365 buf
= mem_fileopen ();
7366 if (*prefix
!= '\0')
7368 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7371 fputs_unfiltered (prefixed_name
, buf
);
7372 xfree (prefixed_name
);
7375 fputs_unfiltered (name
, buf
);
7377 /* Template parameters may be specified in the DIE's DW_AT_name, or
7378 as children with DW_TAG_template_type_param or
7379 DW_TAG_value_type_param. If the latter, add them to the name
7380 here. If the name already has template parameters, then
7381 skip this step; some versions of GCC emit both, and
7382 it is more efficient to use the pre-computed name.
7384 Something to keep in mind about this process: it is very
7385 unlikely, or in some cases downright impossible, to produce
7386 something that will match the mangled name of a function.
7387 If the definition of the function has the same debug info,
7388 we should be able to match up with it anyway. But fallbacks
7389 using the minimal symbol, for instance to find a method
7390 implemented in a stripped copy of libstdc++, will not work.
7391 If we do not have debug info for the definition, we will have to
7392 match them up some other way.
7394 When we do name matching there is a related problem with function
7395 templates; two instantiated function templates are allowed to
7396 differ only by their return types, which we do not add here. */
7398 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7400 struct attribute
*attr
;
7401 struct die_info
*child
;
7404 die
->building_fullname
= 1;
7406 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7411 struct dwarf2_locexpr_baton
*baton
;
7414 if (child
->tag
!= DW_TAG_template_type_param
7415 && child
->tag
!= DW_TAG_template_value_param
)
7420 fputs_unfiltered ("<", buf
);
7424 fputs_unfiltered (", ", buf
);
7426 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7429 complaint (&symfile_complaints
,
7430 _("template parameter missing DW_AT_type"));
7431 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7434 type
= die_type (child
, cu
);
7436 if (child
->tag
== DW_TAG_template_type_param
)
7438 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
7442 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7445 complaint (&symfile_complaints
,
7446 _("template parameter missing "
7447 "DW_AT_const_value"));
7448 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7452 dwarf2_const_value_attr (attr
, type
, name
,
7453 &cu
->comp_unit_obstack
, cu
,
7454 &value
, &bytes
, &baton
);
7456 if (TYPE_NOSIGN (type
))
7457 /* GDB prints characters as NUMBER 'CHAR'. If that's
7458 changed, this can use value_print instead. */
7459 c_printchar (value
, type
, buf
);
7462 struct value_print_options opts
;
7465 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7469 else if (bytes
!= NULL
)
7471 v
= allocate_value (type
);
7472 memcpy (value_contents_writeable (v
), bytes
,
7473 TYPE_LENGTH (type
));
7476 v
= value_from_longest (type
, value
);
7478 /* Specify decimal so that we do not depend on
7480 get_formatted_print_options (&opts
, 'd');
7482 value_print (v
, buf
, &opts
);
7488 die
->building_fullname
= 0;
7492 /* Close the argument list, with a space if necessary
7493 (nested templates). */
7494 char last_char
= '\0';
7495 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7496 if (last_char
== '>')
7497 fputs_unfiltered (" >", buf
);
7499 fputs_unfiltered (">", buf
);
7503 /* For Java and C++ methods, append formal parameter type
7504 information, if PHYSNAME. */
7506 if (physname
&& die
->tag
== DW_TAG_subprogram
7507 && (cu
->language
== language_cplus
7508 || cu
->language
== language_java
))
7510 struct type
*type
= read_type_die (die
, cu
);
7512 c_type_print_args (type
, buf
, 1, cu
->language
,
7513 &type_print_raw_options
);
7515 if (cu
->language
== language_java
)
7517 /* For java, we must append the return type to method
7519 if (die
->tag
== DW_TAG_subprogram
)
7520 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7521 0, 0, &type_print_raw_options
);
7523 else if (cu
->language
== language_cplus
)
7525 /* Assume that an artificial first parameter is
7526 "this", but do not crash if it is not. RealView
7527 marks unnamed (and thus unused) parameters as
7528 artificial; there is no way to differentiate
7530 if (TYPE_NFIELDS (type
) > 0
7531 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7532 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7533 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7535 fputs_unfiltered (" const", buf
);
7539 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7541 ui_file_delete (buf
);
7543 if (cu
->language
== language_cplus
)
7546 = dwarf2_canonicalize_name (name
, cu
,
7547 &objfile
->objfile_obstack
);
7558 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7559 If scope qualifiers are appropriate they will be added. The result
7560 will be allocated on the objfile_obstack, or NULL if the DIE does
7561 not have a name. NAME may either be from a previous call to
7562 dwarf2_name or NULL.
7564 The output string will be canonicalized (if C++/Java). */
7567 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7569 return dwarf2_compute_name (name
, die
, cu
, 0);
7572 /* Construct a physname for the given DIE in CU. NAME may either be
7573 from a previous call to dwarf2_name or NULL. The result will be
7574 allocated on the objfile_objstack or NULL if the DIE does not have a
7577 The output string will be canonicalized (if C++/Java). */
7580 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7582 struct objfile
*objfile
= cu
->objfile
;
7583 struct attribute
*attr
;
7584 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7585 struct cleanup
*back_to
;
7588 /* In this case dwarf2_compute_name is just a shortcut not building anything
7590 if (!die_needs_namespace (die
, cu
))
7591 return dwarf2_compute_name (name
, die
, cu
, 1);
7593 back_to
= make_cleanup (null_cleanup
, NULL
);
7595 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7597 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7599 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7601 if (attr
&& DW_STRING (attr
))
7605 mangled
= DW_STRING (attr
);
7607 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7608 type. It is easier for GDB users to search for such functions as
7609 `name(params)' than `long name(params)'. In such case the minimal
7610 symbol names do not match the full symbol names but for template
7611 functions there is never a need to look up their definition from their
7612 declaration so the only disadvantage remains the minimal symbol
7613 variant `long name(params)' does not have the proper inferior type.
7616 if (cu
->language
== language_go
)
7618 /* This is a lie, but we already lie to the caller new_symbol_full.
7619 new_symbol_full assumes we return the mangled name.
7620 This just undoes that lie until things are cleaned up. */
7625 demangled
= cplus_demangle (mangled
,
7626 (DMGL_PARAMS
| DMGL_ANSI
7627 | (cu
->language
== language_java
7628 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7633 make_cleanup (xfree
, demangled
);
7643 if (canon
== NULL
|| check_physname
)
7645 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7647 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7649 /* It may not mean a bug in GDB. The compiler could also
7650 compute DW_AT_linkage_name incorrectly. But in such case
7651 GDB would need to be bug-to-bug compatible. */
7653 complaint (&symfile_complaints
,
7654 _("Computed physname <%s> does not match demangled <%s> "
7655 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7656 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7658 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7659 is available here - over computed PHYSNAME. It is safer
7660 against both buggy GDB and buggy compilers. */
7674 retval
= obsavestring (retval
, strlen (retval
),
7675 &objfile
->objfile_obstack
);
7677 do_cleanups (back_to
);
7681 /* Read the import statement specified by the given die and record it. */
7684 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7686 struct objfile
*objfile
= cu
->objfile
;
7687 struct attribute
*import_attr
;
7688 struct die_info
*imported_die
, *child_die
;
7689 struct dwarf2_cu
*imported_cu
;
7690 const char *imported_name
;
7691 const char *imported_name_prefix
;
7692 const char *canonical_name
;
7693 const char *import_alias
;
7694 const char *imported_declaration
= NULL
;
7695 const char *import_prefix
;
7696 VEC (const_char_ptr
) *excludes
= NULL
;
7697 struct cleanup
*cleanups
;
7701 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7702 if (import_attr
== NULL
)
7704 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7705 dwarf_tag_name (die
->tag
));
7710 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7711 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7712 if (imported_name
== NULL
)
7714 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7716 The import in the following code:
7730 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7731 <52> DW_AT_decl_file : 1
7732 <53> DW_AT_decl_line : 6
7733 <54> DW_AT_import : <0x75>
7734 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7736 <5b> DW_AT_decl_file : 1
7737 <5c> DW_AT_decl_line : 2
7738 <5d> DW_AT_type : <0x6e>
7740 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7741 <76> DW_AT_byte_size : 4
7742 <77> DW_AT_encoding : 5 (signed)
7744 imports the wrong die ( 0x75 instead of 0x58 ).
7745 This case will be ignored until the gcc bug is fixed. */
7749 /* Figure out the local name after import. */
7750 import_alias
= dwarf2_name (die
, cu
);
7752 /* Figure out where the statement is being imported to. */
7753 import_prefix
= determine_prefix (die
, cu
);
7755 /* Figure out what the scope of the imported die is and prepend it
7756 to the name of the imported die. */
7757 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7759 if (imported_die
->tag
!= DW_TAG_namespace
7760 && imported_die
->tag
!= DW_TAG_module
)
7762 imported_declaration
= imported_name
;
7763 canonical_name
= imported_name_prefix
;
7765 else if (strlen (imported_name_prefix
) > 0)
7767 temp
= alloca (strlen (imported_name_prefix
)
7768 + 2 + strlen (imported_name
) + 1);
7769 strcpy (temp
, imported_name_prefix
);
7770 strcat (temp
, "::");
7771 strcat (temp
, imported_name
);
7772 canonical_name
= temp
;
7775 canonical_name
= imported_name
;
7777 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7779 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7780 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7781 child_die
= sibling_die (child_die
))
7783 /* DWARF-4: A Fortran use statement with a “rename list” may be
7784 represented by an imported module entry with an import attribute
7785 referring to the module and owned entries corresponding to those
7786 entities that are renamed as part of being imported. */
7788 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7790 complaint (&symfile_complaints
,
7791 _("child DW_TAG_imported_declaration expected "
7792 "- DIE at 0x%x [in module %s]"),
7793 child_die
->offset
.sect_off
, objfile
->name
);
7797 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7798 if (import_attr
== NULL
)
7800 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7801 dwarf_tag_name (child_die
->tag
));
7806 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7808 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7809 if (imported_name
== NULL
)
7811 complaint (&symfile_complaints
,
7812 _("child DW_TAG_imported_declaration has unknown "
7813 "imported name - DIE at 0x%x [in module %s]"),
7814 child_die
->offset
.sect_off
, objfile
->name
);
7818 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7820 process_die (child_die
, cu
);
7823 cp_add_using_directive (import_prefix
,
7826 imported_declaration
,
7828 &objfile
->objfile_obstack
);
7830 do_cleanups (cleanups
);
7833 /* Cleanup function for handle_DW_AT_stmt_list. */
7836 free_cu_line_header (void *arg
)
7838 struct dwarf2_cu
*cu
= arg
;
7840 free_line_header (cu
->line_header
);
7841 cu
->line_header
= NULL
;
7844 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
7845 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
7846 this, it was first present in GCC release 4.3.0. */
7849 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
7851 if (!cu
->checked_producer
)
7852 check_producer (cu
);
7854 return cu
->producer_is_gcc_lt_4_3
;
7858 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7859 char **name
, char **comp_dir
)
7861 struct attribute
*attr
;
7866 /* Find the filename. Do not use dwarf2_name here, since the filename
7867 is not a source language identifier. */
7868 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7871 *name
= DW_STRING (attr
);
7874 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7876 *comp_dir
= DW_STRING (attr
);
7877 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
7878 && IS_ABSOLUTE_PATH (*name
))
7880 *comp_dir
= ldirname (*name
);
7881 if (*comp_dir
!= NULL
)
7882 make_cleanup (xfree
, *comp_dir
);
7884 if (*comp_dir
!= NULL
)
7886 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7887 directory, get rid of it. */
7888 char *cp
= strchr (*comp_dir
, ':');
7890 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7895 *name
= "<unknown>";
7898 /* Handle DW_AT_stmt_list for a compilation unit.
7899 DIE is the DW_TAG_compile_unit die for CU.
7900 COMP_DIR is the compilation directory.
7901 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7904 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7905 const char *comp_dir
)
7907 struct attribute
*attr
;
7909 gdb_assert (! cu
->per_cu
->is_debug_types
);
7911 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7914 unsigned int line_offset
= DW_UNSND (attr
);
7915 struct line_header
*line_header
7916 = dwarf_decode_line_header (line_offset
, cu
);
7920 cu
->line_header
= line_header
;
7921 make_cleanup (free_cu_line_header
, cu
);
7922 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7927 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7930 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7932 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7933 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7934 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7935 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7936 struct attribute
*attr
;
7938 char *comp_dir
= NULL
;
7939 struct die_info
*child_die
;
7940 bfd
*abfd
= objfile
->obfd
;
7943 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7945 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7947 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7948 from finish_block. */
7949 if (lowpc
== ((CORE_ADDR
) -1))
7954 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7956 prepare_one_comp_unit (cu
, die
, cu
->language
);
7958 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7959 standardised yet. As a workaround for the language detection we fall
7960 back to the DW_AT_producer string. */
7961 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7962 cu
->language
= language_opencl
;
7964 /* Similar hack for Go. */
7965 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7966 set_cu_language (DW_LANG_Go
, cu
);
7968 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7970 /* Decode line number information if present. We do this before
7971 processing child DIEs, so that the line header table is available
7972 for DW_AT_decl_file. */
7973 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7975 /* Process all dies in compilation unit. */
7976 if (die
->child
!= NULL
)
7978 child_die
= die
->child
;
7979 while (child_die
&& child_die
->tag
)
7981 process_die (child_die
, cu
);
7982 child_die
= sibling_die (child_die
);
7986 /* Decode macro information, if present. Dwarf 2 macro information
7987 refers to information in the line number info statement program
7988 header, so we can only read it if we've read the header
7990 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7991 if (attr
&& cu
->line_header
)
7993 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7994 complaint (&symfile_complaints
,
7995 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7997 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
8001 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
8002 if (attr
&& cu
->line_header
)
8004 unsigned int macro_offset
= DW_UNSND (attr
);
8006 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
8010 do_cleanups (back_to
);
8013 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
8014 Create the set of symtabs used by this TU, or if this TU is sharing
8015 symtabs with another TU and the symtabs have already been created
8016 then restore those symtabs in the line header.
8017 We don't need the pc/line-number mapping for type units. */
8020 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
8022 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8023 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8024 struct type_unit_group
*tu_group
;
8026 struct line_header
*lh
;
8027 struct attribute
*attr
;
8028 unsigned int i
, line_offset
;
8030 gdb_assert (per_cu
->is_debug_types
);
8032 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
8034 /* If we're using .gdb_index (includes -readnow) then
8035 per_cu->s.type_unit_group may not have been set up yet. */
8036 if (per_cu
->s
.type_unit_group
== NULL
)
8037 per_cu
->s
.type_unit_group
= get_type_unit_group (cu
, attr
);
8038 tu_group
= per_cu
->s
.type_unit_group
;
8040 /* If we've already processed this stmt_list there's no real need to
8041 do it again, we could fake it and just recreate the part we need
8042 (file name,index -> symtab mapping). If data shows this optimization
8043 is useful we can do it then. */
8044 first_time
= tu_group
->primary_symtab
== NULL
;
8046 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
8051 line_offset
= DW_UNSND (attr
);
8052 lh
= dwarf_decode_line_header (line_offset
, cu
);
8057 dwarf2_start_symtab (cu
, "", NULL
, 0);
8060 gdb_assert (tu_group
->symtabs
== NULL
);
8063 /* Note: The primary symtab will get allocated at the end. */
8067 cu
->line_header
= lh
;
8068 make_cleanup (free_cu_line_header
, cu
);
8072 dwarf2_start_symtab (cu
, "", NULL
, 0);
8074 tu_group
->num_symtabs
= lh
->num_file_names
;
8075 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
8077 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8080 struct file_entry
*fe
= &lh
->file_names
[i
];
8083 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8084 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
8086 /* Note: We don't have to watch for the main subfile here, type units
8087 don't have DW_AT_name. */
8089 if (current_subfile
->symtab
== NULL
)
8091 /* NOTE: start_subfile will recognize when it's been passed
8092 a file it has already seen. So we can't assume there's a
8093 simple mapping from lh->file_names to subfiles,
8094 lh->file_names may contain dups. */
8095 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8099 fe
->symtab
= current_subfile
->symtab
;
8100 tu_group
->symtabs
[i
] = fe
->symtab
;
8107 for (i
= 0; i
< lh
->num_file_names
; ++i
)
8109 struct file_entry
*fe
= &lh
->file_names
[i
];
8111 fe
->symtab
= tu_group
->symtabs
[i
];
8115 /* The main symtab is allocated last. Type units don't have DW_AT_name
8116 so they don't have a "real" (so to speak) symtab anyway.
8117 There is later code that will assign the main symtab to all symbols
8118 that don't have one. We need to handle the case of a symbol with a
8119 missing symtab (DW_AT_decl_file) anyway. */
8122 /* Process DW_TAG_type_unit.
8123 For TUs we want to skip the first top level sibling if it's not the
8124 actual type being defined by this TU. In this case the first top
8125 level sibling is there to provide context only. */
8128 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8130 struct die_info
*child_die
;
8132 prepare_one_comp_unit (cu
, die
, language_minimal
);
8134 /* Initialize (or reinitialize) the machinery for building symtabs.
8135 We do this before processing child DIEs, so that the line header table
8136 is available for DW_AT_decl_file. */
8137 setup_type_unit_groups (die
, cu
);
8139 if (die
->child
!= NULL
)
8141 child_die
= die
->child
;
8142 while (child_die
&& child_die
->tag
)
8144 process_die (child_die
, cu
);
8145 child_die
= sibling_die (child_die
);
8152 http://gcc.gnu.org/wiki/DebugFission
8153 http://gcc.gnu.org/wiki/DebugFissionDWP
8155 To simplify handling of both DWO files ("object" files with the DWARF info)
8156 and DWP files (a file with the DWOs packaged up into one file), we treat
8157 DWP files as having a collection of virtual DWO files. */
8160 hash_dwo_file (const void *item
)
8162 const struct dwo_file
*dwo_file
= item
;
8164 return htab_hash_string (dwo_file
->name
);
8168 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8170 const struct dwo_file
*lhs
= item_lhs
;
8171 const struct dwo_file
*rhs
= item_rhs
;
8173 return strcmp (lhs
->name
, rhs
->name
) == 0;
8176 /* Allocate a hash table for DWO files. */
8179 allocate_dwo_file_hash_table (void)
8181 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8183 return htab_create_alloc_ex (41,
8187 &objfile
->objfile_obstack
,
8188 hashtab_obstack_allocate
,
8189 dummy_obstack_deallocate
);
8192 /* Lookup DWO file DWO_NAME. */
8195 lookup_dwo_file_slot (const char *dwo_name
)
8197 struct dwo_file find_entry
;
8200 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8201 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8203 memset (&find_entry
, 0, sizeof (find_entry
));
8204 find_entry
.name
= dwo_name
;
8205 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8211 hash_dwo_unit (const void *item
)
8213 const struct dwo_unit
*dwo_unit
= item
;
8215 /* This drops the top 32 bits of the id, but is ok for a hash. */
8216 return dwo_unit
->signature
;
8220 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8222 const struct dwo_unit
*lhs
= item_lhs
;
8223 const struct dwo_unit
*rhs
= item_rhs
;
8225 /* The signature is assumed to be unique within the DWO file.
8226 So while object file CU dwo_id's always have the value zero,
8227 that's OK, assuming each object file DWO file has only one CU,
8228 and that's the rule for now. */
8229 return lhs
->signature
== rhs
->signature
;
8232 /* Allocate a hash table for DWO CUs,TUs.
8233 There is one of these tables for each of CUs,TUs for each DWO file. */
8236 allocate_dwo_unit_table (struct objfile
*objfile
)
8238 /* Start out with a pretty small number.
8239 Generally DWO files contain only one CU and maybe some TUs. */
8240 return htab_create_alloc_ex (3,
8244 &objfile
->objfile_obstack
,
8245 hashtab_obstack_allocate
,
8246 dummy_obstack_deallocate
);
8249 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
8251 struct create_dwo_info_table_data
8253 struct dwo_file
*dwo_file
;
8257 /* die_reader_func for create_dwo_debug_info_hash_table. */
8260 create_dwo_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8262 struct die_info
*comp_unit_die
,
8266 struct dwarf2_cu
*cu
= reader
->cu
;
8267 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8268 sect_offset offset
= cu
->per_cu
->offset
;
8269 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8270 struct create_dwo_info_table_data
*data
= datap
;
8271 struct dwo_file
*dwo_file
= data
->dwo_file
;
8272 htab_t cu_htab
= data
->cu_htab
;
8274 struct attribute
*attr
;
8275 struct dwo_unit
*dwo_unit
;
8277 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8280 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8281 " its dwo_id [in module %s]"),
8282 offset
.sect_off
, dwo_file
->name
);
8286 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8287 dwo_unit
->dwo_file
= dwo_file
;
8288 dwo_unit
->signature
= DW_UNSND (attr
);
8289 dwo_unit
->info_or_types_section
= section
;
8290 dwo_unit
->offset
= offset
;
8291 dwo_unit
->length
= cu
->per_cu
->length
;
8293 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8294 gdb_assert (slot
!= NULL
);
8297 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8299 complaint (&symfile_complaints
,
8300 _("debug entry at offset 0x%x is duplicate to the entry at"
8301 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8302 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8303 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8309 if (dwarf2_read_debug
)
8310 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8312 phex (dwo_unit
->signature
,
8313 sizeof (dwo_unit
->signature
)));
8316 /* Create a hash table to map DWO IDs to their CU entry in
8317 .debug_info.dwo in DWO_FILE.
8318 Note: This function processes DWO files only, not DWP files. */
8321 create_dwo_debug_info_hash_table (struct dwo_file
*dwo_file
)
8323 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8324 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8327 gdb_byte
*info_ptr
, *end_ptr
;
8328 struct create_dwo_info_table_data create_dwo_info_table_data
;
8330 dwarf2_read_section (objfile
, section
);
8331 info_ptr
= section
->buffer
;
8333 if (info_ptr
== NULL
)
8336 /* We can't set abfd until now because the section may be empty or
8337 not present, in which case section->asection will be NULL. */
8338 abfd
= section
->asection
->owner
;
8340 if (dwarf2_read_debug
)
8341 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8342 bfd_get_filename (abfd
));
8344 cu_htab
= allocate_dwo_unit_table (objfile
);
8346 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8347 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8349 end_ptr
= info_ptr
+ section
->size
;
8350 while (info_ptr
< end_ptr
)
8352 struct dwarf2_per_cu_data per_cu
;
8354 memset (&per_cu
, 0, sizeof (per_cu
));
8355 per_cu
.objfile
= objfile
;
8356 per_cu
.is_debug_types
= 0;
8357 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8358 per_cu
.info_or_types_section
= section
;
8360 init_cutu_and_read_dies_no_follow (&per_cu
,
8361 &dwo_file
->sections
.abbrev
,
8363 create_dwo_debug_info_hash_table_reader
,
8364 &create_dwo_info_table_data
);
8366 info_ptr
+= per_cu
.length
;
8372 /* DWP file .debug_{cu,tu}_index section format:
8373 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
8375 Both index sections have the same format, and serve to map a 64-bit
8376 signature to a set of section numbers. Each section begins with a header,
8377 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
8378 indexes, and a pool of 32-bit section numbers. The index sections will be
8379 aligned at 8-byte boundaries in the file.
8381 The index section header contains two unsigned 32-bit values (using the
8382 byte order of the application binary):
8384 N, the number of compilation units or type units in the index
8385 M, the number of slots in the hash table
8387 (We assume that N and M will not exceed 2^32 - 1.)
8389 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
8391 The hash table begins at offset 8 in the section, and consists of an array
8392 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
8393 order of the application binary). Unused slots in the hash table are 0.
8394 (We rely on the extreme unlikeliness of a signature being exactly 0.)
8396 The parallel table begins immediately after the hash table
8397 (at offset 8 + 8 * M from the beginning of the section), and consists of an
8398 array of 32-bit indexes (using the byte order of the application binary),
8399 corresponding 1-1 with slots in the hash table. Each entry in the parallel
8400 table contains a 32-bit index into the pool of section numbers. For unused
8401 hash table slots, the corresponding entry in the parallel table will be 0.
8403 Given a 64-bit compilation unit signature or a type signature S, an entry
8404 in the hash table is located as follows:
8406 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
8407 the low-order k bits all set to 1.
8409 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
8411 3) If the hash table entry at index H matches the signature, use that
8412 entry. If the hash table entry at index H is unused (all zeroes),
8413 terminate the search: the signature is not present in the table.
8415 4) Let H = (H + H') modulo M. Repeat at Step 3.
8417 Because M > N and H' and M are relatively prime, the search is guaranteed
8418 to stop at an unused slot or find the match.
8420 The pool of section numbers begins immediately following the hash table
8421 (at offset 8 + 12 * M from the beginning of the section). The pool of
8422 section numbers consists of an array of 32-bit words (using the byte order
8423 of the application binary). Each item in the array is indexed starting
8424 from 0. The hash table entry provides the index of the first section
8425 number in the set. Additional section numbers in the set follow, and the
8426 set is terminated by a 0 entry (section number 0 is not used in ELF).
8428 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
8429 section must be the first entry in the set, and the .debug_abbrev.dwo must
8430 be the second entry. Other members of the set may follow in any order. */
8432 /* Create a hash table to map DWO IDs to their CU/TU entry in
8433 .debug_{info,types}.dwo in DWP_FILE.
8434 Returns NULL if there isn't one.
8435 Note: This function processes DWP files only, not DWO files. */
8437 static struct dwp_hash_table
*
8438 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
8440 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8441 bfd
*dbfd
= dwp_file
->dbfd
;
8442 char *index_ptr
, *index_end
;
8443 struct dwarf2_section_info
*index
;
8444 uint32_t version
, nr_units
, nr_slots
;
8445 struct dwp_hash_table
*htab
;
8448 index
= &dwp_file
->sections
.tu_index
;
8450 index
= &dwp_file
->sections
.cu_index
;
8452 if (dwarf2_section_empty_p (index
))
8454 dwarf2_read_section (objfile
, index
);
8456 index_ptr
= index
->buffer
;
8457 index_end
= index_ptr
+ index
->size
;
8459 version
= read_4_bytes (dbfd
, index_ptr
);
8460 index_ptr
+= 8; /* Skip the unused word. */
8461 nr_units
= read_4_bytes (dbfd
, index_ptr
);
8463 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
8468 error (_("Dwarf Error: unsupported DWP file version (%u)"
8470 version
, dwp_file
->name
);
8472 if (nr_slots
!= (nr_slots
& -nr_slots
))
8474 error (_("Dwarf Error: number of slots in DWP hash table (%u)"
8475 " is not power of 2 [in module %s]"),
8476 nr_slots
, dwp_file
->name
);
8479 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
8480 htab
->nr_units
= nr_units
;
8481 htab
->nr_slots
= nr_slots
;
8482 htab
->hash_table
= index_ptr
;
8483 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
8484 htab
->section_pool
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
8489 /* Update SECTIONS with the data from SECTP.
8491 This function is like the other "locate" section routines that are
8492 passed to bfd_map_over_sections, but in this context the sections to
8493 read comes from the DWP hash table, not the full ELF section table.
8495 The result is non-zero for success, or zero if an error was found. */
8498 locate_virtual_dwo_sections (asection
*sectp
,
8499 struct virtual_dwo_sections
*sections
)
8501 const struct dwop_section_names
*names
= &dwop_section_names
;
8503 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8505 /* There can be only one. */
8506 if (sections
->abbrev
.asection
!= NULL
)
8508 sections
->abbrev
.asection
= sectp
;
8509 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8511 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
8512 || section_is_p (sectp
->name
, &names
->types_dwo
))
8514 /* There can be only one. */
8515 if (sections
->info_or_types
.asection
!= NULL
)
8517 sections
->info_or_types
.asection
= sectp
;
8518 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
8520 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8522 /* There can be only one. */
8523 if (sections
->line
.asection
!= NULL
)
8525 sections
->line
.asection
= sectp
;
8526 sections
->line
.size
= bfd_get_section_size (sectp
);
8528 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8530 /* There can be only one. */
8531 if (sections
->loc
.asection
!= NULL
)
8533 sections
->loc
.asection
= sectp
;
8534 sections
->loc
.size
= bfd_get_section_size (sectp
);
8536 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8538 /* There can be only one. */
8539 if (sections
->macinfo
.asection
!= NULL
)
8541 sections
->macinfo
.asection
= sectp
;
8542 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8544 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8546 /* There can be only one. */
8547 if (sections
->macro
.asection
!= NULL
)
8549 sections
->macro
.asection
= sectp
;
8550 sections
->macro
.size
= bfd_get_section_size (sectp
);
8552 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8554 /* There can be only one. */
8555 if (sections
->str_offsets
.asection
!= NULL
)
8557 sections
->str_offsets
.asection
= sectp
;
8558 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8562 /* No other kind of section is valid. */
8569 /* Create a dwo_unit object for the DWO with signature SIGNATURE.
8570 HTAB is the hash table from the DWP file.
8571 SECTION_INDEX is the index of the DWO in HTAB. */
8573 static struct dwo_unit
*
8574 create_dwo_in_dwp (struct dwp_file
*dwp_file
,
8575 const struct dwp_hash_table
*htab
,
8576 uint32_t section_index
,
8577 ULONGEST signature
, int is_debug_types
)
8579 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8580 bfd
*dbfd
= dwp_file
->dbfd
;
8581 const char *kind
= is_debug_types
? "TU" : "CU";
8582 struct dwo_file
*dwo_file
;
8583 struct dwo_unit
*dwo_unit
;
8584 struct virtual_dwo_sections sections
;
8585 void **dwo_file_slot
;
8586 char *virtual_dwo_name
;
8587 struct dwarf2_section_info
*cutu
;
8588 struct cleanup
*cleanups
;
8591 if (dwarf2_read_debug
)
8593 fprintf_unfiltered (gdb_stdlog
, "Reading %s %u/0x%s in DWP file: %s\n",
8595 section_index
, phex (signature
, sizeof (signature
)),
8599 /* Fetch the sections of this DWO.
8600 Put a limit on the number of sections we look for so that bad data
8601 doesn't cause us to loop forever. */
8603 #define MAX_NR_DWO_SECTIONS \
8604 (1 /* .debug_info or .debug_types */ \
8605 + 1 /* .debug_abbrev */ \
8606 + 1 /* .debug_line */ \
8607 + 1 /* .debug_loc */ \
8608 + 1 /* .debug_str_offsets */ \
8609 + 1 /* .debug_macro */ \
8610 + 1 /* .debug_macinfo */ \
8611 + 1 /* trailing zero */)
8613 memset (§ions
, 0, sizeof (sections
));
8614 cleanups
= make_cleanup (null_cleanup
, 0);
8616 for (i
= 0; i
< MAX_NR_DWO_SECTIONS
; ++i
)
8619 uint32_t section_nr
=
8622 + (section_index
+ i
) * sizeof (uint32_t));
8624 if (section_nr
== 0)
8626 if (section_nr
>= dwp_file
->num_sections
)
8628 error (_("Dwarf Error: bad DWP hash table, section number too large"
8633 sectp
= dwp_file
->elf_sections
[section_nr
];
8634 if (! locate_virtual_dwo_sections (sectp
, §ions
))
8636 error (_("Dwarf Error: bad DWP hash table, invalid section found"
8643 || sections
.info_or_types
.asection
== NULL
8644 || sections
.abbrev
.asection
== NULL
)
8646 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
8650 if (i
== MAX_NR_DWO_SECTIONS
)
8652 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
8657 /* It's easier for the rest of the code if we fake a struct dwo_file and
8658 have dwo_unit "live" in that. At least for now.
8660 The DWP file can be made up of a random collection of CUs and TUs.
8661 However, for each CU + set of TUs that came from the same original DWO
8662 file, we want to combine them back into a virtual DWO file to save space
8663 (fewer struct dwo_file objects to allocated). Remember that for really
8664 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
8667 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
8668 sections
.abbrev
.asection
? sections
.abbrev
.asection
->id
: 0,
8669 sections
.line
.asection
? sections
.line
.asection
->id
: 0,
8670 sections
.loc
.asection
? sections
.loc
.asection
->id
: 0,
8671 (sections
.str_offsets
.asection
8672 ? sections
.str_offsets
.asection
->id
8674 make_cleanup (xfree
, virtual_dwo_name
);
8675 /* Can we use an existing virtual DWO file? */
8676 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
);
8677 /* Create one if necessary. */
8678 if (*dwo_file_slot
== NULL
)
8680 if (dwarf2_read_debug
)
8682 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
8685 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8686 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8688 strlen (virtual_dwo_name
));
8689 dwo_file
->sections
.abbrev
= sections
.abbrev
;
8690 dwo_file
->sections
.line
= sections
.line
;
8691 dwo_file
->sections
.loc
= sections
.loc
;
8692 dwo_file
->sections
.macinfo
= sections
.macinfo
;
8693 dwo_file
->sections
.macro
= sections
.macro
;
8694 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
8695 /* The "str" section is global to the entire DWP file. */
8696 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
8697 /* The info or types section is assigned later to dwo_unit,
8698 there's no need to record it in dwo_file.
8699 Also, we can't simply record type sections in dwo_file because
8700 we record a pointer into the vector in dwo_unit. As we collect more
8701 types we'll grow the vector and eventually have to reallocate space
8702 for it, invalidating all the pointers into the current copy. */
8703 *dwo_file_slot
= dwo_file
;
8707 if (dwarf2_read_debug
)
8709 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
8712 dwo_file
= *dwo_file_slot
;
8714 do_cleanups (cleanups
);
8716 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8717 dwo_unit
->dwo_file
= dwo_file
;
8718 dwo_unit
->signature
= signature
;
8719 dwo_unit
->info_or_types_section
=
8720 obstack_alloc (&objfile
->objfile_obstack
,
8721 sizeof (struct dwarf2_section_info
));
8722 *dwo_unit
->info_or_types_section
= sections
.info_or_types
;
8723 /* offset, length, type_offset_in_tu are set later. */
8728 /* Lookup the DWO with SIGNATURE in DWP_FILE. */
8730 static struct dwo_unit
*
8731 lookup_dwo_in_dwp (struct dwp_file
*dwp_file
,
8732 const struct dwp_hash_table
*htab
,
8733 ULONGEST signature
, int is_debug_types
)
8735 bfd
*dbfd
= dwp_file
->dbfd
;
8736 uint32_t mask
= htab
->nr_slots
- 1;
8737 uint32_t hash
= signature
& mask
;
8738 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
8741 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8743 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
8744 find_dwo_cu
.signature
= signature
;
8745 slot
= htab_find_slot (dwp_file
->loaded_cutus
, &find_dwo_cu
, INSERT
);
8750 /* Use a for loop so that we don't loop forever on bad debug info. */
8751 for (i
= 0; i
< htab
->nr_slots
; ++i
)
8753 ULONGEST signature_in_table
;
8755 signature_in_table
=
8756 read_8_bytes (dbfd
, htab
->hash_table
+ hash
* sizeof (uint64_t));
8757 if (signature_in_table
== signature
)
8759 uint32_t section_index
=
8760 read_4_bytes (dbfd
, htab
->unit_table
+ hash
* sizeof (uint32_t));
8762 *slot
= create_dwo_in_dwp (dwp_file
, htab
, section_index
,
8763 signature
, is_debug_types
);
8766 if (signature_in_table
== 0)
8768 hash
= (hash
+ hash2
) & mask
;
8771 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
8776 /* Subroutine of open_dwop_file to simplify it.
8777 Open the file specified by FILE_NAME and hand it off to BFD for
8778 preliminary analysis. Return a newly initialized bfd *, which
8779 includes a canonicalized copy of FILE_NAME.
8780 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8781 In case of trouble, return NULL.
8782 NOTE: This function is derived from symfile_bfd_open. */
8785 try_open_dwop_file (const char *file_name
, int is_dwp
)
8789 char *absolute_name
;
8791 flags
= OPF_TRY_CWD_FIRST
;
8793 flags
|= OPF_SEARCH_IN_PATH
;
8794 desc
= openp (debug_file_directory
, flags
, file_name
,
8795 O_RDONLY
| O_BINARY
, &absolute_name
);
8799 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8802 xfree (absolute_name
);
8805 xfree (absolute_name
);
8806 bfd_set_cacheable (sym_bfd
, 1);
8808 if (!bfd_check_format (sym_bfd
, bfd_object
))
8810 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8817 /* Try to open DWO/DWP file FILE_NAME.
8818 COMP_DIR is the DW_AT_comp_dir attribute.
8819 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
8820 The result is the bfd handle of the file.
8821 If there is a problem finding or opening the file, return NULL.
8822 Upon success, the canonicalized path of the file is stored in the bfd,
8823 same as symfile_bfd_open. */
8826 open_dwop_file (const char *file_name
, const char *comp_dir
, int is_dwp
)
8830 if (IS_ABSOLUTE_PATH (file_name
))
8831 return try_open_dwop_file (file_name
, is_dwp
);
8833 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8835 if (comp_dir
!= NULL
)
8837 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
8839 /* NOTE: If comp_dir is a relative path, this will also try the
8840 search path, which seems useful. */
8841 abfd
= try_open_dwop_file (path_to_try
, is_dwp
);
8842 xfree (path_to_try
);
8847 /* That didn't work, try debug-file-directory, which, despite its name,
8848 is a list of paths. */
8850 if (*debug_file_directory
== '\0')
8853 return try_open_dwop_file (file_name
, is_dwp
);
8856 /* This function is mapped across the sections and remembers the offset and
8857 size of each of the DWO debugging sections we are interested in. */
8860 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
8862 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
8863 const struct dwop_section_names
*names
= &dwop_section_names
;
8865 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8867 dwo_sections
->abbrev
.asection
= sectp
;
8868 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
8870 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8872 dwo_sections
->info
.asection
= sectp
;
8873 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
8875 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8877 dwo_sections
->line
.asection
= sectp
;
8878 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
8880 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8882 dwo_sections
->loc
.asection
= sectp
;
8883 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
8885 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8887 dwo_sections
->macinfo
.asection
= sectp
;
8888 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
8890 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8892 dwo_sections
->macro
.asection
= sectp
;
8893 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
8895 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8897 dwo_sections
->str
.asection
= sectp
;
8898 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
8900 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8902 dwo_sections
->str_offsets
.asection
= sectp
;
8903 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
8905 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8907 struct dwarf2_section_info type_section
;
8909 memset (&type_section
, 0, sizeof (type_section
));
8910 type_section
.asection
= sectp
;
8911 type_section
.size
= bfd_get_section_size (sectp
);
8912 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
8917 /* Initialize the use of the DWO file specified by DWO_NAME.
8918 The result is NULL if DWO_NAME can't be found. */
8920 static struct dwo_file
*
8921 open_and_init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8923 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8924 struct dwo_file
*dwo_file
;
8926 struct cleanup
*cleanups
;
8928 dbfd
= open_dwop_file (dwo_name
, comp_dir
, 0);
8931 if (dwarf2_read_debug
)
8932 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
8935 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
8936 dwo_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
8937 dwo_name
, strlen (dwo_name
));
8938 dwo_file
->dbfd
= dbfd
;
8940 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8942 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
8944 dwo_file
->cus
= create_dwo_debug_info_hash_table (dwo_file
);
8946 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8947 dwo_file
->sections
.types
);
8949 discard_cleanups (cleanups
);
8951 if (dwarf2_read_debug
)
8952 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
8957 /* This function is mapped across the sections and remembers the offset and
8958 size of each of the DWP debugging sections we are interested in. */
8961 dwarf2_locate_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
8963 struct dwp_file
*dwp_file
= dwp_file_ptr
;
8964 const struct dwop_section_names
*names
= &dwop_section_names
;
8965 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
8967 /* Record the ELF section number for later lookup: this is what the
8968 .debug_cu_index,.debug_tu_index tables use. */
8969 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
8970 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
8972 /* Look for specific sections that we need. */
8973 if (section_is_p (sectp
->name
, &names
->str_dwo
))
8975 dwp_file
->sections
.str
.asection
= sectp
;
8976 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8978 else if (section_is_p (sectp
->name
, &names
->cu_index
))
8980 dwp_file
->sections
.cu_index
.asection
= sectp
;
8981 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
8983 else if (section_is_p (sectp
->name
, &names
->tu_index
))
8985 dwp_file
->sections
.tu_index
.asection
= sectp
;
8986 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
8990 /* Hash function for dwp_file loaded CUs/TUs. */
8993 hash_dwp_loaded_cutus (const void *item
)
8995 const struct dwo_unit
*dwo_unit
= item
;
8997 /* This drops the top 32 bits of the signature, but is ok for a hash. */
8998 return dwo_unit
->signature
;
9001 /* Equality function for dwp_file loaded CUs/TUs. */
9004 eq_dwp_loaded_cutus (const void *a
, const void *b
)
9006 const struct dwo_unit
*dua
= a
;
9007 const struct dwo_unit
*dub
= b
;
9009 return dua
->signature
== dub
->signature
;
9012 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
9015 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
9017 return htab_create_alloc_ex (3,
9018 hash_dwp_loaded_cutus
,
9019 eq_dwp_loaded_cutus
,
9021 &objfile
->objfile_obstack
,
9022 hashtab_obstack_allocate
,
9023 dummy_obstack_deallocate
);
9026 /* Initialize the use of the DWP file for the current objfile.
9027 By convention the name of the DWP file is ${objfile}.dwp.
9028 The result is NULL if it can't be found. */
9030 static struct dwp_file
*
9031 open_and_init_dwp_file (const char *comp_dir
)
9033 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9034 struct dwp_file
*dwp_file
;
9037 struct cleanup
*cleanups
;
9039 dwp_name
= xstrprintf ("%s.dwp", dwarf2_per_objfile
->objfile
->name
);
9040 cleanups
= make_cleanup (xfree
, dwp_name
);
9042 dbfd
= open_dwop_file (dwp_name
, comp_dir
, 1);
9045 if (dwarf2_read_debug
)
9046 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
9047 do_cleanups (cleanups
);
9050 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
9051 dwp_file
->name
= obstack_copy0 (&objfile
->objfile_obstack
,
9052 dwp_name
, strlen (dwp_name
));
9053 dwp_file
->dbfd
= dbfd
;
9054 do_cleanups (cleanups
);
9056 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwp_file
);
9058 /* +1: section 0 is unused */
9059 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
9060 dwp_file
->elf_sections
=
9061 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
9062 dwp_file
->num_sections
, asection
*);
9064 bfd_map_over_sections (dbfd
, dwarf2_locate_dwp_sections
, dwp_file
);
9066 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
9068 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
9070 dwp_file
->loaded_cutus
= allocate_dwp_loaded_cutus_table (objfile
);
9072 discard_cleanups (cleanups
);
9074 if (dwarf2_read_debug
)
9076 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
9077 fprintf_unfiltered (gdb_stdlog
,
9078 " %u CUs, %u TUs\n",
9079 dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0,
9080 dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0);
9086 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
9087 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
9088 or in the DWP file for the objfile, referenced by THIS_UNIT.
9089 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
9090 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
9092 This is called, for example, when wanting to read a variable with a
9093 complex location. Therefore we don't want to do file i/o for every call.
9094 Therefore we don't want to look for a DWO file on every call.
9095 Therefore we first see if we've already seen SIGNATURE in a DWP file,
9096 then we check if we've already seen DWO_NAME, and only THEN do we check
9099 The result is a pointer to the dwo_unit object or NULL if we didn't find it
9100 (dwo_id mismatch or couldn't find the DWO/DWP file). */
9102 static struct dwo_unit
*
9103 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
9104 const char *dwo_name
, const char *comp_dir
,
9105 ULONGEST signature
, int is_debug_types
)
9107 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9108 const char *kind
= is_debug_types
? "TU" : "CU";
9109 void **dwo_file_slot
;
9110 struct dwo_file
*dwo_file
;
9111 struct dwp_file
*dwp_file
;
9113 /* Have we already read SIGNATURE from a DWP file? */
9115 if (! dwarf2_per_objfile
->dwp_checked
)
9117 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file (comp_dir
);
9118 dwarf2_per_objfile
->dwp_checked
= 1;
9120 dwp_file
= dwarf2_per_objfile
->dwp_file
;
9122 if (dwp_file
!= NULL
)
9124 const struct dwp_hash_table
*dwp_htab
=
9125 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9127 if (dwp_htab
!= NULL
)
9129 struct dwo_unit
*dwo_cutu
=
9130 lookup_dwo_in_dwp (dwp_file
, dwp_htab
, signature
, is_debug_types
);
9132 if (dwo_cutu
!= NULL
)
9134 if (dwarf2_read_debug
)
9136 fprintf_unfiltered (gdb_stdlog
,
9137 "Virtual DWO %s %s found: @%s\n",
9138 kind
, hex_string (signature
),
9139 host_address_to_string (dwo_cutu
));
9146 /* Have we already seen DWO_NAME? */
9148 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
);
9149 if (*dwo_file_slot
== NULL
)
9151 /* Read in the file and build a table of the DWOs it contains. */
9152 *dwo_file_slot
= open_and_init_dwo_file (dwo_name
, comp_dir
);
9154 /* NOTE: This will be NULL if unable to open the file. */
9155 dwo_file
= *dwo_file_slot
;
9157 if (dwo_file
!= NULL
)
9159 htab_t htab
= is_debug_types
? dwo_file
->tus
: dwo_file
->cus
;
9163 struct dwo_unit find_dwo_cutu
, *dwo_cutu
;
9165 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
9166 find_dwo_cutu
.signature
= signature
;
9167 dwo_cutu
= htab_find (htab
, &find_dwo_cutu
);
9169 if (dwo_cutu
!= NULL
)
9171 if (dwarf2_read_debug
)
9173 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
9174 kind
, dwo_name
, hex_string (signature
),
9175 host_address_to_string (dwo_cutu
));
9182 /* We didn't find it. This could mean a dwo_id mismatch, or
9183 someone deleted the DWO/DWP file, or the search path isn't set up
9184 correctly to find the file. */
9186 if (dwarf2_read_debug
)
9188 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
9189 kind
, dwo_name
, hex_string (signature
));
9192 complaint (&symfile_complaints
,
9193 _("Could not find DWO CU referenced by CU at offset 0x%x"
9195 this_unit
->offset
.sect_off
, objfile
->name
);
9199 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
9200 See lookup_dwo_cutu_unit for details. */
9202 static struct dwo_unit
*
9203 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9204 const char *dwo_name
, const char *comp_dir
,
9207 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
9210 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
9211 See lookup_dwo_cutu_unit for details. */
9213 static struct dwo_unit
*
9214 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
9215 const char *dwo_name
, const char *comp_dir
)
9217 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
9220 /* Free all resources associated with DWO_FILE.
9221 Close the DWO file and munmap the sections.
9222 All memory should be on the objfile obstack. */
9225 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
9228 struct dwarf2_section_info
*section
;
9230 gdb_assert (dwo_file
->dbfd
!= objfile
->obfd
);
9231 gdb_bfd_unref (dwo_file
->dbfd
);
9233 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
9236 /* Wrapper for free_dwo_file for use in cleanups. */
9239 free_dwo_file_cleanup (void *arg
)
9241 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
9242 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9244 free_dwo_file (dwo_file
, objfile
);
9247 /* Traversal function for free_dwo_files. */
9250 free_dwo_file_from_slot (void **slot
, void *info
)
9252 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
9253 struct objfile
*objfile
= (struct objfile
*) info
;
9255 free_dwo_file (dwo_file
, objfile
);
9260 /* Free all resources associated with DWO_FILES. */
9263 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
9265 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
9268 /* Read in various DIEs. */
9270 /* qsort helper for inherit_abstract_dies. */
9273 unsigned_int_compar (const void *ap
, const void *bp
)
9275 unsigned int a
= *(unsigned int *) ap
;
9276 unsigned int b
= *(unsigned int *) bp
;
9278 return (a
> b
) - (b
> a
);
9281 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
9282 Inherit only the children of the DW_AT_abstract_origin DIE not being
9283 already referenced by DW_AT_abstract_origin from the children of the
9287 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
9289 struct die_info
*child_die
;
9290 unsigned die_children_count
;
9291 /* CU offsets which were referenced by children of the current DIE. */
9292 sect_offset
*offsets
;
9293 sect_offset
*offsets_end
, *offsetp
;
9294 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
9295 struct die_info
*origin_die
;
9296 /* Iterator of the ORIGIN_DIE children. */
9297 struct die_info
*origin_child_die
;
9298 struct cleanup
*cleanups
;
9299 struct attribute
*attr
;
9300 struct dwarf2_cu
*origin_cu
;
9301 struct pending
**origin_previous_list_in_scope
;
9303 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9307 /* Note that following die references may follow to a die in a
9311 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
9313 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
9315 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
9316 origin_cu
->list_in_scope
= cu
->list_in_scope
;
9318 if (die
->tag
!= origin_die
->tag
9319 && !(die
->tag
== DW_TAG_inlined_subroutine
9320 && origin_die
->tag
== DW_TAG_subprogram
))
9321 complaint (&symfile_complaints
,
9322 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
9323 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
9325 child_die
= die
->child
;
9326 die_children_count
= 0;
9327 while (child_die
&& child_die
->tag
)
9329 child_die
= sibling_die (child_die
);
9330 die_children_count
++;
9332 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
9333 cleanups
= make_cleanup (xfree
, offsets
);
9335 offsets_end
= offsets
;
9336 child_die
= die
->child
;
9337 while (child_die
&& child_die
->tag
)
9339 /* For each CHILD_DIE, find the corresponding child of
9340 ORIGIN_DIE. If there is more than one layer of
9341 DW_AT_abstract_origin, follow them all; there shouldn't be,
9342 but GCC versions at least through 4.4 generate this (GCC PR
9344 struct die_info
*child_origin_die
= child_die
;
9345 struct dwarf2_cu
*child_origin_cu
= cu
;
9349 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
9353 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
9357 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
9358 counterpart may exist. */
9359 if (child_origin_die
!= child_die
)
9361 if (child_die
->tag
!= child_origin_die
->tag
9362 && !(child_die
->tag
== DW_TAG_inlined_subroutine
9363 && child_origin_die
->tag
== DW_TAG_subprogram
))
9364 complaint (&symfile_complaints
,
9365 _("Child DIE 0x%x and its abstract origin 0x%x have "
9366 "different tags"), child_die
->offset
.sect_off
,
9367 child_origin_die
->offset
.sect_off
);
9368 if (child_origin_die
->parent
!= origin_die
)
9369 complaint (&symfile_complaints
,
9370 _("Child DIE 0x%x and its abstract origin 0x%x have "
9371 "different parents"), child_die
->offset
.sect_off
,
9372 child_origin_die
->offset
.sect_off
);
9374 *offsets_end
++ = child_origin_die
->offset
;
9376 child_die
= sibling_die (child_die
);
9378 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
9379 unsigned_int_compar
);
9380 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
9381 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
9382 complaint (&symfile_complaints
,
9383 _("Multiple children of DIE 0x%x refer "
9384 "to DIE 0x%x as their abstract origin"),
9385 die
->offset
.sect_off
, offsetp
->sect_off
);
9388 origin_child_die
= origin_die
->child
;
9389 while (origin_child_die
&& origin_child_die
->tag
)
9391 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
9392 while (offsetp
< offsets_end
9393 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
9395 if (offsetp
>= offsets_end
9396 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
9398 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
9399 process_die (origin_child_die
, origin_cu
);
9401 origin_child_die
= sibling_die (origin_child_die
);
9403 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
9405 do_cleanups (cleanups
);
9409 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9411 struct objfile
*objfile
= cu
->objfile
;
9412 struct context_stack
*new;
9415 struct die_info
*child_die
;
9416 struct attribute
*attr
, *call_line
, *call_file
;
9419 struct block
*block
;
9420 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
9421 VEC (symbolp
) *template_args
= NULL
;
9422 struct template_symbol
*templ_func
= NULL
;
9426 /* If we do not have call site information, we can't show the
9427 caller of this inlined function. That's too confusing, so
9428 only use the scope for local variables. */
9429 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
9430 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
9431 if (call_line
== NULL
|| call_file
== NULL
)
9433 read_lexical_block_scope (die
, cu
);
9438 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9440 name
= dwarf2_name (die
, cu
);
9442 /* Ignore functions with missing or empty names. These are actually
9443 illegal according to the DWARF standard. */
9446 complaint (&symfile_complaints
,
9447 _("missing name for subprogram DIE at %d"),
9448 die
->offset
.sect_off
);
9452 /* Ignore functions with missing or invalid low and high pc attributes. */
9453 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9455 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9456 if (!attr
|| !DW_UNSND (attr
))
9457 complaint (&symfile_complaints
,
9458 _("cannot get low and high bounds "
9459 "for subprogram DIE at %d"),
9460 die
->offset
.sect_off
);
9467 /* If we have any template arguments, then we must allocate a
9468 different sort of symbol. */
9469 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
9471 if (child_die
->tag
== DW_TAG_template_type_param
9472 || child_die
->tag
== DW_TAG_template_value_param
)
9474 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
9475 struct template_symbol
);
9476 templ_func
->base
.is_cplus_template_function
= 1;
9481 new = push_context (0, lowpc
);
9482 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
9483 (struct symbol
*) templ_func
);
9485 /* If there is a location expression for DW_AT_frame_base, record
9487 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
9489 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
9490 expression is being recorded directly in the function's symbol
9491 and not in a separate frame-base object. I guess this hack is
9492 to avoid adding some sort of frame-base adjunct/annex to the
9493 function's symbol :-(. The problem with doing this is that it
9494 results in a function symbol with a location expression that
9495 has nothing to do with the location of the function, ouch! The
9496 relationship should be: a function's symbol has-a frame base; a
9497 frame-base has-a location expression. */
9498 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
9500 cu
->list_in_scope
= &local_symbols
;
9502 if (die
->child
!= NULL
)
9504 child_die
= die
->child
;
9505 while (child_die
&& child_die
->tag
)
9507 if (child_die
->tag
== DW_TAG_template_type_param
9508 || child_die
->tag
== DW_TAG_template_value_param
)
9510 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9513 VEC_safe_push (symbolp
, template_args
, arg
);
9516 process_die (child_die
, cu
);
9517 child_die
= sibling_die (child_die
);
9521 inherit_abstract_dies (die
, cu
);
9523 /* If we have a DW_AT_specification, we might need to import using
9524 directives from the context of the specification DIE. See the
9525 comment in determine_prefix. */
9526 if (cu
->language
== language_cplus
9527 && dwarf2_attr (die
, DW_AT_specification
, cu
))
9529 struct dwarf2_cu
*spec_cu
= cu
;
9530 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
9534 child_die
= spec_die
->child
;
9535 while (child_die
&& child_die
->tag
)
9537 if (child_die
->tag
== DW_TAG_imported_module
)
9538 process_die (child_die
, spec_cu
);
9539 child_die
= sibling_die (child_die
);
9542 /* In some cases, GCC generates specification DIEs that
9543 themselves contain DW_AT_specification attributes. */
9544 spec_die
= die_specification (spec_die
, &spec_cu
);
9548 new = pop_context ();
9549 /* Make a block for the local symbols within. */
9550 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
9551 lowpc
, highpc
, objfile
);
9553 /* For C++, set the block's scope. */
9554 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
9555 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
9556 determine_prefix (die
, cu
),
9557 processing_has_namespace_info
);
9559 /* If we have address ranges, record them. */
9560 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9562 /* Attach template arguments to function. */
9563 if (! VEC_empty (symbolp
, template_args
))
9565 gdb_assert (templ_func
!= NULL
);
9567 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
9568 templ_func
->template_arguments
9569 = obstack_alloc (&objfile
->objfile_obstack
,
9570 (templ_func
->n_template_arguments
9571 * sizeof (struct symbol
*)));
9572 memcpy (templ_func
->template_arguments
,
9573 VEC_address (symbolp
, template_args
),
9574 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
9575 VEC_free (symbolp
, template_args
);
9578 /* In C++, we can have functions nested inside functions (e.g., when
9579 a function declares a class that has methods). This means that
9580 when we finish processing a function scope, we may need to go
9581 back to building a containing block's symbol lists. */
9582 local_symbols
= new->locals
;
9583 using_directives
= new->using_directives
;
9585 /* If we've finished processing a top-level function, subsequent
9586 symbols go in the file symbol list. */
9587 if (outermost_context_p ())
9588 cu
->list_in_scope
= &file_symbols
;
9591 /* Process all the DIES contained within a lexical block scope. Start
9592 a new scope, process the dies, and then close the scope. */
9595 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9597 struct objfile
*objfile
= cu
->objfile
;
9598 struct context_stack
*new;
9599 CORE_ADDR lowpc
, highpc
;
9600 struct die_info
*child_die
;
9603 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9605 /* Ignore blocks with missing or invalid low and high pc attributes. */
9606 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
9607 as multiple lexical blocks? Handling children in a sane way would
9608 be nasty. Might be easier to properly extend generic blocks to
9610 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
9615 push_context (0, lowpc
);
9616 if (die
->child
!= NULL
)
9618 child_die
= die
->child
;
9619 while (child_die
&& child_die
->tag
)
9621 process_die (child_die
, cu
);
9622 child_die
= sibling_die (child_die
);
9625 new = pop_context ();
9627 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
9630 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
9633 /* Note that recording ranges after traversing children, as we
9634 do here, means that recording a parent's ranges entails
9635 walking across all its children's ranges as they appear in
9636 the address map, which is quadratic behavior.
9638 It would be nicer to record the parent's ranges before
9639 traversing its children, simply overriding whatever you find
9640 there. But since we don't even decide whether to create a
9641 block until after we've traversed its children, that's hard
9643 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
9645 local_symbols
= new->locals
;
9646 using_directives
= new->using_directives
;
9649 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
9652 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9654 struct objfile
*objfile
= cu
->objfile
;
9655 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9656 CORE_ADDR pc
, baseaddr
;
9657 struct attribute
*attr
;
9658 struct call_site
*call_site
, call_site_local
;
9661 struct die_info
*child_die
;
9663 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9665 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9668 complaint (&symfile_complaints
,
9669 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
9670 "DIE 0x%x [in module %s]"),
9671 die
->offset
.sect_off
, objfile
->name
);
9674 pc
= DW_ADDR (attr
) + baseaddr
;
9676 if (cu
->call_site_htab
== NULL
)
9677 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
9678 NULL
, &objfile
->objfile_obstack
,
9679 hashtab_obstack_allocate
, NULL
);
9680 call_site_local
.pc
= pc
;
9681 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
9684 complaint (&symfile_complaints
,
9685 _("Duplicate PC %s for DW_TAG_GNU_call_site "
9686 "DIE 0x%x [in module %s]"),
9687 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
9691 /* Count parameters at the caller. */
9694 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9695 child_die
= sibling_die (child_die
))
9697 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9699 complaint (&symfile_complaints
,
9700 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
9701 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9702 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
9709 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
9710 (sizeof (*call_site
)
9711 + (sizeof (*call_site
->parameter
)
9714 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
9717 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
9719 struct die_info
*func_die
;
9721 /* Skip also over DW_TAG_inlined_subroutine. */
9722 for (func_die
= die
->parent
;
9723 func_die
&& func_die
->tag
!= DW_TAG_subprogram
9724 && func_die
->tag
!= DW_TAG_subroutine_type
;
9725 func_die
= func_die
->parent
);
9727 /* DW_AT_GNU_all_call_sites is a superset
9728 of DW_AT_GNU_all_tail_call_sites. */
9730 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
9731 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
9733 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
9734 not complete. But keep CALL_SITE for look ups via call_site_htab,
9735 both the initial caller containing the real return address PC and
9736 the final callee containing the current PC of a chain of tail
9737 calls do not need to have the tail call list complete. But any
9738 function candidate for a virtual tail call frame searched via
9739 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
9740 determined unambiguously. */
9744 struct type
*func_type
= NULL
;
9747 func_type
= get_die_type (func_die
, cu
);
9748 if (func_type
!= NULL
)
9750 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9752 /* Enlist this call site to the function. */
9753 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9754 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9757 complaint (&symfile_complaints
,
9758 _("Cannot find function owning DW_TAG_GNU_call_site "
9759 "DIE 0x%x [in module %s]"),
9760 die
->offset
.sect_off
, objfile
->name
);
9764 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9766 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9767 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9768 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9769 /* Keep NULL DWARF_BLOCK. */;
9770 else if (attr_form_is_block (attr
))
9772 struct dwarf2_locexpr_baton
*dlbaton
;
9774 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9775 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9776 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9777 dlbaton
->per_cu
= cu
->per_cu
;
9779 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9781 else if (is_ref_attr (attr
))
9783 struct dwarf2_cu
*target_cu
= cu
;
9784 struct die_info
*target_die
;
9786 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9787 gdb_assert (target_cu
->objfile
== objfile
);
9788 if (die_is_declaration (target_die
, target_cu
))
9790 const char *target_physname
;
9792 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9793 if (target_physname
== NULL
)
9794 complaint (&symfile_complaints
,
9795 _("DW_AT_GNU_call_site_target target DIE has invalid "
9796 "physname, for referencing DIE 0x%x [in module %s]"),
9797 die
->offset
.sect_off
, objfile
->name
);
9799 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
9805 /* DW_AT_entry_pc should be preferred. */
9806 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9807 complaint (&symfile_complaints
,
9808 _("DW_AT_GNU_call_site_target target DIE has invalid "
9809 "low pc, for referencing DIE 0x%x [in module %s]"),
9810 die
->offset
.sect_off
, objfile
->name
);
9812 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9816 complaint (&symfile_complaints
,
9817 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9818 "block nor reference, for DIE 0x%x [in module %s]"),
9819 die
->offset
.sect_off
, objfile
->name
);
9821 call_site
->per_cu
= cu
->per_cu
;
9823 for (child_die
= die
->child
;
9824 child_die
&& child_die
->tag
;
9825 child_die
= sibling_die (child_die
))
9827 struct call_site_parameter
*parameter
;
9828 struct attribute
*loc
, *origin
;
9830 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9832 /* Already printed the complaint above. */
9836 gdb_assert (call_site
->parameter_count
< nparams
);
9837 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9839 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9840 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9841 register is contained in DW_AT_GNU_call_site_value. */
9843 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9844 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9845 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9849 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9850 offset
= dwarf2_get_ref_die_offset (origin
);
9851 if (!offset_in_cu_p (&cu
->header
, offset
))
9853 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9854 binding can be done only inside one CU. Such referenced DIE
9855 therefore cannot be even moved to DW_TAG_partial_unit. */
9856 complaint (&symfile_complaints
,
9857 _("DW_AT_abstract_origin offset is not in CU for "
9858 "DW_TAG_GNU_call_site child DIE 0x%x "
9860 child_die
->offset
.sect_off
, objfile
->name
);
9863 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9864 - cu
->header
.offset
.sect_off
);
9866 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9868 complaint (&symfile_complaints
,
9869 _("No DW_FORM_block* DW_AT_location for "
9870 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9871 child_die
->offset
.sect_off
, objfile
->name
);
9876 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9877 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9878 if (parameter
->u
.dwarf_reg
!= -1)
9879 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9880 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9881 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9882 ¶meter
->u
.fb_offset
))
9883 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9886 complaint (&symfile_complaints
,
9887 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9888 "for DW_FORM_block* DW_AT_location is supported for "
9889 "DW_TAG_GNU_call_site child DIE 0x%x "
9891 child_die
->offset
.sect_off
, objfile
->name
);
9896 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9897 if (!attr_form_is_block (attr
))
9899 complaint (&symfile_complaints
,
9900 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9901 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9902 child_die
->offset
.sect_off
, objfile
->name
);
9905 parameter
->value
= DW_BLOCK (attr
)->data
;
9906 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9908 /* Parameters are not pre-cleared by memset above. */
9909 parameter
->data_value
= NULL
;
9910 parameter
->data_value_size
= 0;
9911 call_site
->parameter_count
++;
9913 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9916 if (!attr_form_is_block (attr
))
9917 complaint (&symfile_complaints
,
9918 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9919 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9920 child_die
->offset
.sect_off
, objfile
->name
);
9923 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9924 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9930 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9931 Return 1 if the attributes are present and valid, otherwise, return 0.
9932 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9935 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9936 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9937 struct partial_symtab
*ranges_pst
)
9939 struct objfile
*objfile
= cu
->objfile
;
9940 struct comp_unit_head
*cu_header
= &cu
->header
;
9941 bfd
*obfd
= objfile
->obfd
;
9942 unsigned int addr_size
= cu_header
->addr_size
;
9943 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9944 /* Base address selection entry. */
9955 found_base
= cu
->base_known
;
9956 base
= cu
->base_address
;
9958 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9959 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9961 complaint (&symfile_complaints
,
9962 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9966 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9968 /* Read in the largest possible address. */
9969 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9970 if ((marker
& mask
) == mask
)
9972 /* If we found the largest possible address, then
9973 read the base address. */
9974 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9975 buffer
+= 2 * addr_size
;
9976 offset
+= 2 * addr_size
;
9982 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9986 CORE_ADDR range_beginning
, range_end
;
9988 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9989 buffer
+= addr_size
;
9990 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9991 buffer
+= addr_size
;
9992 offset
+= 2 * addr_size
;
9994 /* An end of list marker is a pair of zero addresses. */
9995 if (range_beginning
== 0 && range_end
== 0)
9996 /* Found the end of list entry. */
9999 /* Each base address selection entry is a pair of 2 values.
10000 The first is the largest possible address, the second is
10001 the base address. Check for a base address here. */
10002 if ((range_beginning
& mask
) == mask
)
10004 /* If we found the largest possible address, then
10005 read the base address. */
10006 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
10013 /* We have no valid base address for the ranges
10015 complaint (&symfile_complaints
,
10016 _("Invalid .debug_ranges data (no base address)"));
10020 if (range_beginning
> range_end
)
10022 /* Inverted range entries are invalid. */
10023 complaint (&symfile_complaints
,
10024 _("Invalid .debug_ranges data (inverted range)"));
10028 /* Empty range entries have no effect. */
10029 if (range_beginning
== range_end
)
10032 range_beginning
+= base
;
10035 /* A not-uncommon case of bad debug info.
10036 Don't pollute the addrmap with bad data. */
10037 if (range_beginning
+ baseaddr
== 0
10038 && !dwarf2_per_objfile
->has_section_at_zero
)
10040 complaint (&symfile_complaints
,
10041 _(".debug_ranges entry has start address of zero"
10042 " [in module %s]"), objfile
->name
);
10046 if (ranges_pst
!= NULL
)
10047 addrmap_set_empty (objfile
->psymtabs_addrmap
,
10048 range_beginning
+ baseaddr
,
10049 range_end
- 1 + baseaddr
,
10052 /* FIXME: This is recording everything as a low-high
10053 segment of consecutive addresses. We should have a
10054 data structure for discontiguous block ranges
10058 low
= range_beginning
;
10064 if (range_beginning
< low
)
10065 low
= range_beginning
;
10066 if (range_end
> high
)
10072 /* If the first entry is an end-of-list marker, the range
10073 describes an empty scope, i.e. no instructions. */
10079 *high_return
= high
;
10083 /* Get low and high pc attributes from a die. Return 1 if the attributes
10084 are present and valid, otherwise, return 0. Return -1 if the range is
10085 discontinuous, i.e. derived from DW_AT_ranges information. */
10088 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
10089 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
10090 struct partial_symtab
*pst
)
10092 struct attribute
*attr
;
10093 struct attribute
*attr_high
;
10095 CORE_ADDR high
= 0;
10098 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10101 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10104 low
= DW_ADDR (attr
);
10105 if (attr_high
->form
== DW_FORM_addr
10106 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10107 high
= DW_ADDR (attr_high
);
10109 high
= low
+ DW_UNSND (attr_high
);
10112 /* Found high w/o low attribute. */
10115 /* Found consecutive range of addresses. */
10120 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10123 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10124 We take advantage of the fact that DW_AT_ranges does not appear
10125 in DW_TAG_compile_unit of DWO files. */
10126 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10127 unsigned int ranges_offset
= (DW_UNSND (attr
)
10128 + (need_ranges_base
10132 /* Value of the DW_AT_ranges attribute is the offset in the
10133 .debug_ranges section. */
10134 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
10136 /* Found discontinuous range of addresses. */
10141 /* read_partial_die has also the strict LOW < HIGH requirement. */
10145 /* When using the GNU linker, .gnu.linkonce. sections are used to
10146 eliminate duplicate copies of functions and vtables and such.
10147 The linker will arbitrarily choose one and discard the others.
10148 The AT_*_pc values for such functions refer to local labels in
10149 these sections. If the section from that file was discarded, the
10150 labels are not in the output, so the relocs get a value of 0.
10151 If this is a discarded function, mark the pc bounds as invalid,
10152 so that GDB will ignore it. */
10153 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10162 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
10163 its low and high PC addresses. Do nothing if these addresses could not
10164 be determined. Otherwise, set LOWPC to the low address if it is smaller,
10165 and HIGHPC to the high address if greater than HIGHPC. */
10168 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
10169 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10170 struct dwarf2_cu
*cu
)
10172 CORE_ADDR low
, high
;
10173 struct die_info
*child
= die
->child
;
10175 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
10177 *lowpc
= min (*lowpc
, low
);
10178 *highpc
= max (*highpc
, high
);
10181 /* If the language does not allow nested subprograms (either inside
10182 subprograms or lexical blocks), we're done. */
10183 if (cu
->language
!= language_ada
)
10186 /* Check all the children of the given DIE. If it contains nested
10187 subprograms, then check their pc bounds. Likewise, we need to
10188 check lexical blocks as well, as they may also contain subprogram
10190 while (child
&& child
->tag
)
10192 if (child
->tag
== DW_TAG_subprogram
10193 || child
->tag
== DW_TAG_lexical_block
)
10194 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
10195 child
= sibling_die (child
);
10199 /* Get the low and high pc's represented by the scope DIE, and store
10200 them in *LOWPC and *HIGHPC. If the correct values can't be
10201 determined, set *LOWPC to -1 and *HIGHPC to 0. */
10204 get_scope_pc_bounds (struct die_info
*die
,
10205 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
10206 struct dwarf2_cu
*cu
)
10208 CORE_ADDR best_low
= (CORE_ADDR
) -1;
10209 CORE_ADDR best_high
= (CORE_ADDR
) 0;
10210 CORE_ADDR current_low
, current_high
;
10212 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
10214 best_low
= current_low
;
10215 best_high
= current_high
;
10219 struct die_info
*child
= die
->child
;
10221 while (child
&& child
->tag
)
10223 switch (child
->tag
) {
10224 case DW_TAG_subprogram
:
10225 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
10227 case DW_TAG_namespace
:
10228 case DW_TAG_module
:
10229 /* FIXME: carlton/2004-01-16: Should we do this for
10230 DW_TAG_class_type/DW_TAG_structure_type, too? I think
10231 that current GCC's always emit the DIEs corresponding
10232 to definitions of methods of classes as children of a
10233 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
10234 the DIEs giving the declarations, which could be
10235 anywhere). But I don't see any reason why the
10236 standards says that they have to be there. */
10237 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
10239 if (current_low
!= ((CORE_ADDR
) -1))
10241 best_low
= min (best_low
, current_low
);
10242 best_high
= max (best_high
, current_high
);
10250 child
= sibling_die (child
);
10255 *highpc
= best_high
;
10258 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
10262 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
10263 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
10265 struct objfile
*objfile
= cu
->objfile
;
10266 struct attribute
*attr
;
10267 struct attribute
*attr_high
;
10269 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
10272 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10275 CORE_ADDR low
= DW_ADDR (attr
);
10277 if (attr_high
->form
== DW_FORM_addr
10278 || attr_high
->form
== DW_FORM_GNU_addr_index
)
10279 high
= DW_ADDR (attr_high
);
10281 high
= low
+ DW_UNSND (attr_high
);
10283 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
10287 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
10290 bfd
*obfd
= objfile
->obfd
;
10291 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
10292 We take advantage of the fact that DW_AT_ranges does not appear
10293 in DW_TAG_compile_unit of DWO files. */
10294 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
10296 /* The value of the DW_AT_ranges attribute is the offset of the
10297 address range list in the .debug_ranges section. */
10298 unsigned long offset
= (DW_UNSND (attr
)
10299 + (need_ranges_base
? cu
->ranges_base
: 0));
10300 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
10302 /* For some target architectures, but not others, the
10303 read_address function sign-extends the addresses it returns.
10304 To recognize base address selection entries, we need a
10306 unsigned int addr_size
= cu
->header
.addr_size
;
10307 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
10309 /* The base address, to which the next pair is relative. Note
10310 that this 'base' is a DWARF concept: most entries in a range
10311 list are relative, to reduce the number of relocs against the
10312 debugging information. This is separate from this function's
10313 'baseaddr' argument, which GDB uses to relocate debugging
10314 information from a shared library based on the address at
10315 which the library was loaded. */
10316 CORE_ADDR base
= cu
->base_address
;
10317 int base_known
= cu
->base_known
;
10319 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
10320 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
10322 complaint (&symfile_complaints
,
10323 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
10330 unsigned int bytes_read
;
10331 CORE_ADDR start
, end
;
10333 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10334 buffer
+= bytes_read
;
10335 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
10336 buffer
+= bytes_read
;
10338 /* Did we find the end of the range list? */
10339 if (start
== 0 && end
== 0)
10342 /* Did we find a base address selection entry? */
10343 else if ((start
& base_select_mask
) == base_select_mask
)
10349 /* We found an ordinary address range. */
10354 complaint (&symfile_complaints
,
10355 _("Invalid .debug_ranges data "
10356 "(no base address)"));
10362 /* Inverted range entries are invalid. */
10363 complaint (&symfile_complaints
,
10364 _("Invalid .debug_ranges data "
10365 "(inverted range)"));
10369 /* Empty range entries have no effect. */
10373 start
+= base
+ baseaddr
;
10374 end
+= base
+ baseaddr
;
10376 /* A not-uncommon case of bad debug info.
10377 Don't pollute the addrmap with bad data. */
10378 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
10380 complaint (&symfile_complaints
,
10381 _(".debug_ranges entry has start address of zero"
10382 " [in module %s]"), objfile
->name
);
10386 record_block_range (block
, start
, end
- 1);
10392 /* Check whether the producer field indicates either of GCC < 4.6, or the
10393 Intel C/C++ compiler, and cache the result in CU. */
10396 check_producer (struct dwarf2_cu
*cu
)
10399 int major
, minor
, release
;
10401 if (cu
->producer
== NULL
)
10403 /* For unknown compilers expect their behavior is DWARF version
10406 GCC started to support .debug_types sections by -gdwarf-4 since
10407 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
10408 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
10409 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
10410 interpreted incorrectly by GDB now - GCC PR debug/48229. */
10412 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
10414 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
10416 cs
= &cu
->producer
[strlen ("GNU ")];
10417 while (*cs
&& !isdigit (*cs
))
10419 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
10421 /* Not recognized as GCC. */
10425 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
10426 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
10429 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
10430 cu
->producer_is_icc
= 1;
10433 /* For other non-GCC compilers, expect their behavior is DWARF version
10437 cu
->checked_producer
= 1;
10440 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
10441 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
10442 during 4.6.0 experimental. */
10445 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
10447 if (!cu
->checked_producer
)
10448 check_producer (cu
);
10450 return cu
->producer_is_gxx_lt_4_6
;
10453 /* Return the default accessibility type if it is not overriden by
10454 DW_AT_accessibility. */
10456 static enum dwarf_access_attribute
10457 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
10459 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
10461 /* The default DWARF 2 accessibility for members is public, the default
10462 accessibility for inheritance is private. */
10464 if (die
->tag
!= DW_TAG_inheritance
)
10465 return DW_ACCESS_public
;
10467 return DW_ACCESS_private
;
10471 /* DWARF 3+ defines the default accessibility a different way. The same
10472 rules apply now for DW_TAG_inheritance as for the members and it only
10473 depends on the container kind. */
10475 if (die
->parent
->tag
== DW_TAG_class_type
)
10476 return DW_ACCESS_private
;
10478 return DW_ACCESS_public
;
10482 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
10483 offset. If the attribute was not found return 0, otherwise return
10484 1. If it was found but could not properly be handled, set *OFFSET
10488 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
10491 struct attribute
*attr
;
10493 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
10498 /* Note that we do not check for a section offset first here.
10499 This is because DW_AT_data_member_location is new in DWARF 4,
10500 so if we see it, we can assume that a constant form is really
10501 a constant and not a section offset. */
10502 if (attr_form_is_constant (attr
))
10503 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
10504 else if (attr_form_is_section_offset (attr
))
10505 dwarf2_complex_location_expr_complaint ();
10506 else if (attr_form_is_block (attr
))
10507 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10509 dwarf2_complex_location_expr_complaint ();
10517 /* Add an aggregate field to the field list. */
10520 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
10521 struct dwarf2_cu
*cu
)
10523 struct objfile
*objfile
= cu
->objfile
;
10524 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10525 struct nextfield
*new_field
;
10526 struct attribute
*attr
;
10528 char *fieldname
= "";
10530 /* Allocate a new field list entry and link it in. */
10531 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
10532 make_cleanup (xfree
, new_field
);
10533 memset (new_field
, 0, sizeof (struct nextfield
));
10535 if (die
->tag
== DW_TAG_inheritance
)
10537 new_field
->next
= fip
->baseclasses
;
10538 fip
->baseclasses
= new_field
;
10542 new_field
->next
= fip
->fields
;
10543 fip
->fields
= new_field
;
10547 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10549 new_field
->accessibility
= DW_UNSND (attr
);
10551 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
10552 if (new_field
->accessibility
!= DW_ACCESS_public
)
10553 fip
->non_public_fields
= 1;
10555 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10557 new_field
->virtuality
= DW_UNSND (attr
);
10559 new_field
->virtuality
= DW_VIRTUALITY_none
;
10561 fp
= &new_field
->field
;
10563 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
10567 /* Data member other than a C++ static data member. */
10569 /* Get type of field. */
10570 fp
->type
= die_type (die
, cu
);
10572 SET_FIELD_BITPOS (*fp
, 0);
10574 /* Get bit size of field (zero if none). */
10575 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
10578 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
10582 FIELD_BITSIZE (*fp
) = 0;
10585 /* Get bit offset of field. */
10586 if (handle_data_member_location (die
, cu
, &offset
))
10587 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10588 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
10591 if (gdbarch_bits_big_endian (gdbarch
))
10593 /* For big endian bits, the DW_AT_bit_offset gives the
10594 additional bit offset from the MSB of the containing
10595 anonymous object to the MSB of the field. We don't
10596 have to do anything special since we don't need to
10597 know the size of the anonymous object. */
10598 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
10602 /* For little endian bits, compute the bit offset to the
10603 MSB of the anonymous object, subtract off the number of
10604 bits from the MSB of the field to the MSB of the
10605 object, and then subtract off the number of bits of
10606 the field itself. The result is the bit offset of
10607 the LSB of the field. */
10608 int anonymous_size
;
10609 int bit_offset
= DW_UNSND (attr
);
10611 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10614 /* The size of the anonymous object containing
10615 the bit field is explicit, so use the
10616 indicated size (in bytes). */
10617 anonymous_size
= DW_UNSND (attr
);
10621 /* The size of the anonymous object containing
10622 the bit field must be inferred from the type
10623 attribute of the data member containing the
10625 anonymous_size
= TYPE_LENGTH (fp
->type
);
10627 SET_FIELD_BITPOS (*fp
,
10628 (FIELD_BITPOS (*fp
)
10629 + anonymous_size
* bits_per_byte
10630 - bit_offset
- FIELD_BITSIZE (*fp
)));
10634 /* Get name of field. */
10635 fieldname
= dwarf2_name (die
, cu
);
10636 if (fieldname
== NULL
)
10639 /* The name is already allocated along with this objfile, so we don't
10640 need to duplicate it for the type. */
10641 fp
->name
= fieldname
;
10643 /* Change accessibility for artificial fields (e.g. virtual table
10644 pointer or virtual base class pointer) to private. */
10645 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
10647 FIELD_ARTIFICIAL (*fp
) = 1;
10648 new_field
->accessibility
= DW_ACCESS_private
;
10649 fip
->non_public_fields
= 1;
10652 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
10654 /* C++ static member. */
10656 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
10657 is a declaration, but all versions of G++ as of this writing
10658 (so through at least 3.2.1) incorrectly generate
10659 DW_TAG_variable tags. */
10661 const char *physname
;
10663 /* Get name of field. */
10664 fieldname
= dwarf2_name (die
, cu
);
10665 if (fieldname
== NULL
)
10668 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10670 /* Only create a symbol if this is an external value.
10671 new_symbol checks this and puts the value in the global symbol
10672 table, which we want. If it is not external, new_symbol
10673 will try to put the value in cu->list_in_scope which is wrong. */
10674 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
10676 /* A static const member, not much different than an enum as far as
10677 we're concerned, except that we can support more types. */
10678 new_symbol (die
, NULL
, cu
);
10681 /* Get physical name. */
10682 physname
= dwarf2_physname (fieldname
, die
, cu
);
10684 /* The name is already allocated along with this objfile, so we don't
10685 need to duplicate it for the type. */
10686 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
10687 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10688 FIELD_NAME (*fp
) = fieldname
;
10690 else if (die
->tag
== DW_TAG_inheritance
)
10694 /* C++ base class field. */
10695 if (handle_data_member_location (die
, cu
, &offset
))
10696 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
10697 FIELD_BITSIZE (*fp
) = 0;
10698 FIELD_TYPE (*fp
) = die_type (die
, cu
);
10699 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
10700 fip
->nbaseclasses
++;
10704 /* Add a typedef defined in the scope of the FIP's class. */
10707 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
10708 struct dwarf2_cu
*cu
)
10710 struct objfile
*objfile
= cu
->objfile
;
10711 struct typedef_field_list
*new_field
;
10712 struct attribute
*attr
;
10713 struct typedef_field
*fp
;
10714 char *fieldname
= "";
10716 /* Allocate a new field list entry and link it in. */
10717 new_field
= xzalloc (sizeof (*new_field
));
10718 make_cleanup (xfree
, new_field
);
10720 gdb_assert (die
->tag
== DW_TAG_typedef
);
10722 fp
= &new_field
->field
;
10724 /* Get name of field. */
10725 fp
->name
= dwarf2_name (die
, cu
);
10726 if (fp
->name
== NULL
)
10729 fp
->type
= read_type_die (die
, cu
);
10731 new_field
->next
= fip
->typedef_field_list
;
10732 fip
->typedef_field_list
= new_field
;
10733 fip
->typedef_field_list_count
++;
10736 /* Create the vector of fields, and attach it to the type. */
10739 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
10740 struct dwarf2_cu
*cu
)
10742 int nfields
= fip
->nfields
;
10744 /* Record the field count, allocate space for the array of fields,
10745 and create blank accessibility bitfields if necessary. */
10746 TYPE_NFIELDS (type
) = nfields
;
10747 TYPE_FIELDS (type
) = (struct field
*)
10748 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
10749 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
10751 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
10753 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10755 TYPE_FIELD_PRIVATE_BITS (type
) =
10756 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10757 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10759 TYPE_FIELD_PROTECTED_BITS (type
) =
10760 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10761 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10763 TYPE_FIELD_IGNORE_BITS (type
) =
10764 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10765 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10768 /* If the type has baseclasses, allocate and clear a bit vector for
10769 TYPE_FIELD_VIRTUAL_BITS. */
10770 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10772 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10773 unsigned char *pointer
;
10775 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10776 pointer
= TYPE_ALLOC (type
, num_bytes
);
10777 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10778 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10779 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10782 /* Copy the saved-up fields into the field vector. Start from the head of
10783 the list, adding to the tail of the field array, so that they end up in
10784 the same order in the array in which they were added to the list. */
10785 while (nfields
-- > 0)
10787 struct nextfield
*fieldp
;
10791 fieldp
= fip
->fields
;
10792 fip
->fields
= fieldp
->next
;
10796 fieldp
= fip
->baseclasses
;
10797 fip
->baseclasses
= fieldp
->next
;
10800 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10801 switch (fieldp
->accessibility
)
10803 case DW_ACCESS_private
:
10804 if (cu
->language
!= language_ada
)
10805 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10808 case DW_ACCESS_protected
:
10809 if (cu
->language
!= language_ada
)
10810 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10813 case DW_ACCESS_public
:
10817 /* Unknown accessibility. Complain and treat it as public. */
10819 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10820 fieldp
->accessibility
);
10824 if (nfields
< fip
->nbaseclasses
)
10826 switch (fieldp
->virtuality
)
10828 case DW_VIRTUALITY_virtual
:
10829 case DW_VIRTUALITY_pure_virtual
:
10830 if (cu
->language
== language_ada
)
10831 error (_("unexpected virtuality in component of Ada type"));
10832 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10839 /* Return true if this member function is a constructor, false
10843 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
10845 const char *fieldname
;
10846 const char *typename
;
10849 if (die
->parent
== NULL
)
10852 if (die
->parent
->tag
!= DW_TAG_structure_type
10853 && die
->parent
->tag
!= DW_TAG_union_type
10854 && die
->parent
->tag
!= DW_TAG_class_type
)
10857 fieldname
= dwarf2_name (die
, cu
);
10858 typename
= dwarf2_name (die
->parent
, cu
);
10859 if (fieldname
== NULL
|| typename
== NULL
)
10862 len
= strlen (fieldname
);
10863 return (strncmp (fieldname
, typename
, len
) == 0
10864 && (typename
[len
] == '\0' || typename
[len
] == '<'));
10867 /* Add a member function to the proper fieldlist. */
10870 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10871 struct type
*type
, struct dwarf2_cu
*cu
)
10873 struct objfile
*objfile
= cu
->objfile
;
10874 struct attribute
*attr
;
10875 struct fnfieldlist
*flp
;
10877 struct fn_field
*fnp
;
10879 struct nextfnfield
*new_fnfield
;
10880 struct type
*this_type
;
10881 enum dwarf_access_attribute accessibility
;
10883 if (cu
->language
== language_ada
)
10884 error (_("unexpected member function in Ada type"));
10886 /* Get name of member function. */
10887 fieldname
= dwarf2_name (die
, cu
);
10888 if (fieldname
== NULL
)
10891 /* Look up member function name in fieldlist. */
10892 for (i
= 0; i
< fip
->nfnfields
; i
++)
10894 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10898 /* Create new list element if necessary. */
10899 if (i
< fip
->nfnfields
)
10900 flp
= &fip
->fnfieldlists
[i
];
10903 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10905 fip
->fnfieldlists
= (struct fnfieldlist
*)
10906 xrealloc (fip
->fnfieldlists
,
10907 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10908 * sizeof (struct fnfieldlist
));
10909 if (fip
->nfnfields
== 0)
10910 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10912 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10913 flp
->name
= fieldname
;
10916 i
= fip
->nfnfields
++;
10919 /* Create a new member function field and chain it to the field list
10921 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10922 make_cleanup (xfree
, new_fnfield
);
10923 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10924 new_fnfield
->next
= flp
->head
;
10925 flp
->head
= new_fnfield
;
10928 /* Fill in the member function field info. */
10929 fnp
= &new_fnfield
->fnfield
;
10931 /* Delay processing of the physname until later. */
10932 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10934 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10939 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10940 fnp
->physname
= physname
? physname
: "";
10943 fnp
->type
= alloc_type (objfile
);
10944 this_type
= read_type_die (die
, cu
);
10945 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10947 int nparams
= TYPE_NFIELDS (this_type
);
10949 /* TYPE is the domain of this method, and THIS_TYPE is the type
10950 of the method itself (TYPE_CODE_METHOD). */
10951 smash_to_method_type (fnp
->type
, type
,
10952 TYPE_TARGET_TYPE (this_type
),
10953 TYPE_FIELDS (this_type
),
10954 TYPE_NFIELDS (this_type
),
10955 TYPE_VARARGS (this_type
));
10957 /* Handle static member functions.
10958 Dwarf2 has no clean way to discern C++ static and non-static
10959 member functions. G++ helps GDB by marking the first
10960 parameter for non-static member functions (which is the this
10961 pointer) as artificial. We obtain this information from
10962 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10963 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10964 fnp
->voffset
= VOFFSET_STATIC
;
10967 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10968 dwarf2_full_name (fieldname
, die
, cu
));
10970 /* Get fcontext from DW_AT_containing_type if present. */
10971 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10972 fnp
->fcontext
= die_containing_type (die
, cu
);
10974 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10975 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10977 /* Get accessibility. */
10978 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10980 accessibility
= DW_UNSND (attr
);
10982 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10983 switch (accessibility
)
10985 case DW_ACCESS_private
:
10986 fnp
->is_private
= 1;
10988 case DW_ACCESS_protected
:
10989 fnp
->is_protected
= 1;
10993 /* Check for artificial methods. */
10994 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
10995 if (attr
&& DW_UNSND (attr
) != 0)
10996 fnp
->is_artificial
= 1;
10998 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
11000 /* Get index in virtual function table if it is a virtual member
11001 function. For older versions of GCC, this is an offset in the
11002 appropriate virtual table, as specified by DW_AT_containing_type.
11003 For everyone else, it is an expression to be evaluated relative
11004 to the object address. */
11006 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
11009 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
11011 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
11013 /* Old-style GCC. */
11014 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
11016 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11017 || (DW_BLOCK (attr
)->size
> 1
11018 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
11019 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
11021 struct dwarf_block blk
;
11024 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
11026 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
11027 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
11028 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
11029 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
11030 dwarf2_complex_location_expr_complaint ();
11032 fnp
->voffset
/= cu
->header
.addr_size
;
11036 dwarf2_complex_location_expr_complaint ();
11038 if (!fnp
->fcontext
)
11039 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
11041 else if (attr_form_is_section_offset (attr
))
11043 dwarf2_complex_location_expr_complaint ();
11047 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
11053 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
11054 if (attr
&& DW_UNSND (attr
))
11056 /* GCC does this, as of 2008-08-25; PR debug/37237. */
11057 complaint (&symfile_complaints
,
11058 _("Member function \"%s\" (offset %d) is virtual "
11059 "but the vtable offset is not specified"),
11060 fieldname
, die
->offset
.sect_off
);
11061 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11062 TYPE_CPLUS_DYNAMIC (type
) = 1;
11067 /* Create the vector of member function fields, and attach it to the type. */
11070 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
11071 struct dwarf2_cu
*cu
)
11073 struct fnfieldlist
*flp
;
11076 if (cu
->language
== language_ada
)
11077 error (_("unexpected member functions in Ada type"));
11079 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11080 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
11081 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
11083 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
11085 struct nextfnfield
*nfp
= flp
->head
;
11086 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
11089 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
11090 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
11091 fn_flp
->fn_fields
= (struct fn_field
*)
11092 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
11093 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
11094 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
11097 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
11100 /* Returns non-zero if NAME is the name of a vtable member in CU's
11101 language, zero otherwise. */
11103 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
11105 static const char vptr
[] = "_vptr";
11106 static const char vtable
[] = "vtable";
11108 /* Look for the C++ and Java forms of the vtable. */
11109 if ((cu
->language
== language_java
11110 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
11111 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
11112 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
11118 /* GCC outputs unnamed structures that are really pointers to member
11119 functions, with the ABI-specified layout. If TYPE describes
11120 such a structure, smash it into a member function type.
11122 GCC shouldn't do this; it should just output pointer to member DIEs.
11123 This is GCC PR debug/28767. */
11126 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
11128 struct type
*pfn_type
, *domain_type
, *new_type
;
11130 /* Check for a structure with no name and two children. */
11131 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
11134 /* Check for __pfn and __delta members. */
11135 if (TYPE_FIELD_NAME (type
, 0) == NULL
11136 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
11137 || TYPE_FIELD_NAME (type
, 1) == NULL
11138 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
11141 /* Find the type of the method. */
11142 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
11143 if (pfn_type
== NULL
11144 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
11145 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
11148 /* Look for the "this" argument. */
11149 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
11150 if (TYPE_NFIELDS (pfn_type
) == 0
11151 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
11152 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
11155 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
11156 new_type
= alloc_type (objfile
);
11157 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
11158 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
11159 TYPE_VARARGS (pfn_type
));
11160 smash_to_methodptr_type (type
, new_type
);
11163 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
11167 producer_is_icc (struct dwarf2_cu
*cu
)
11169 if (!cu
->checked_producer
)
11170 check_producer (cu
);
11172 return cu
->producer_is_icc
;
11175 /* Called when we find the DIE that starts a structure or union scope
11176 (definition) to create a type for the structure or union. Fill in
11177 the type's name and general properties; the members will not be
11178 processed until process_structure_type.
11180 NOTE: we need to call these functions regardless of whether or not the
11181 DIE has a DW_AT_name attribute, since it might be an anonymous
11182 structure or union. This gets the type entered into our set of
11183 user defined types.
11185 However, if the structure is incomplete (an opaque struct/union)
11186 then suppress creating a symbol table entry for it since gdb only
11187 wants to find the one with the complete definition. Note that if
11188 it is complete, we just call new_symbol, which does it's own
11189 checking about whether the struct/union is anonymous or not (and
11190 suppresses creating a symbol table entry itself). */
11192 static struct type
*
11193 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11195 struct objfile
*objfile
= cu
->objfile
;
11197 struct attribute
*attr
;
11200 /* If the definition of this type lives in .debug_types, read that type.
11201 Don't follow DW_AT_specification though, that will take us back up
11202 the chain and we want to go down. */
11203 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11206 struct dwarf2_cu
*type_cu
= cu
;
11207 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11209 /* We could just recurse on read_structure_type, but we need to call
11210 get_die_type to ensure only one type for this DIE is created.
11211 This is important, for example, because for c++ classes we need
11212 TYPE_NAME set which is only done by new_symbol. Blech. */
11213 type
= read_type_die (type_die
, type_cu
);
11215 /* TYPE_CU may not be the same as CU.
11216 Ensure TYPE is recorded in CU's type_hash table. */
11217 return set_die_type (die
, type
, cu
);
11220 type
= alloc_type (objfile
);
11221 INIT_CPLUS_SPECIFIC (type
);
11223 name
= dwarf2_name (die
, cu
);
11226 if (cu
->language
== language_cplus
11227 || cu
->language
== language_java
)
11229 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
11231 /* dwarf2_full_name might have already finished building the DIE's
11232 type. If so, there is no need to continue. */
11233 if (get_die_type (die
, cu
) != NULL
)
11234 return get_die_type (die
, cu
);
11236 TYPE_TAG_NAME (type
) = full_name
;
11237 if (die
->tag
== DW_TAG_structure_type
11238 || die
->tag
== DW_TAG_class_type
)
11239 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11243 /* The name is already allocated along with this objfile, so
11244 we don't need to duplicate it for the type. */
11245 TYPE_TAG_NAME (type
) = (char *) name
;
11246 if (die
->tag
== DW_TAG_class_type
)
11247 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
11251 if (die
->tag
== DW_TAG_structure_type
)
11253 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
11255 else if (die
->tag
== DW_TAG_union_type
)
11257 TYPE_CODE (type
) = TYPE_CODE_UNION
;
11261 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
11264 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
11265 TYPE_DECLARED_CLASS (type
) = 1;
11267 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11270 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11274 TYPE_LENGTH (type
) = 0;
11277 if (producer_is_icc (cu
))
11279 /* ICC does not output the required DW_AT_declaration
11280 on incomplete types, but gives them a size of zero. */
11283 TYPE_STUB_SUPPORTED (type
) = 1;
11285 if (die_is_declaration (die
, cu
))
11286 TYPE_STUB (type
) = 1;
11287 else if (attr
== NULL
&& die
->child
== NULL
11288 && producer_is_realview (cu
->producer
))
11289 /* RealView does not output the required DW_AT_declaration
11290 on incomplete types. */
11291 TYPE_STUB (type
) = 1;
11293 /* We need to add the type field to the die immediately so we don't
11294 infinitely recurse when dealing with pointers to the structure
11295 type within the structure itself. */
11296 set_die_type (die
, type
, cu
);
11298 /* set_die_type should be already done. */
11299 set_descriptive_type (type
, die
, cu
);
11304 /* Finish creating a structure or union type, including filling in
11305 its members and creating a symbol for it. */
11308 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11310 struct objfile
*objfile
= cu
->objfile
;
11311 struct die_info
*child_die
= die
->child
;
11314 type
= get_die_type (die
, cu
);
11316 type
= read_structure_type (die
, cu
);
11318 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
11320 struct field_info fi
;
11321 struct die_info
*child_die
;
11322 VEC (symbolp
) *template_args
= NULL
;
11323 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
11325 memset (&fi
, 0, sizeof (struct field_info
));
11327 child_die
= die
->child
;
11329 while (child_die
&& child_die
->tag
)
11331 if (child_die
->tag
== DW_TAG_member
11332 || child_die
->tag
== DW_TAG_variable
)
11334 /* NOTE: carlton/2002-11-05: A C++ static data member
11335 should be a DW_TAG_member that is a declaration, but
11336 all versions of G++ as of this writing (so through at
11337 least 3.2.1) incorrectly generate DW_TAG_variable
11338 tags for them instead. */
11339 dwarf2_add_field (&fi
, child_die
, cu
);
11341 else if (child_die
->tag
== DW_TAG_subprogram
)
11343 /* C++ member function. */
11344 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
11346 else if (child_die
->tag
== DW_TAG_inheritance
)
11348 /* C++ base class field. */
11349 dwarf2_add_field (&fi
, child_die
, cu
);
11351 else if (child_die
->tag
== DW_TAG_typedef
)
11352 dwarf2_add_typedef (&fi
, child_die
, cu
);
11353 else if (child_die
->tag
== DW_TAG_template_type_param
11354 || child_die
->tag
== DW_TAG_template_value_param
)
11356 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11359 VEC_safe_push (symbolp
, template_args
, arg
);
11362 child_die
= sibling_die (child_die
);
11365 /* Attach template arguments to type. */
11366 if (! VEC_empty (symbolp
, template_args
))
11368 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11369 TYPE_N_TEMPLATE_ARGUMENTS (type
)
11370 = VEC_length (symbolp
, template_args
);
11371 TYPE_TEMPLATE_ARGUMENTS (type
)
11372 = obstack_alloc (&objfile
->objfile_obstack
,
11373 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11374 * sizeof (struct symbol
*)));
11375 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
11376 VEC_address (symbolp
, template_args
),
11377 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
11378 * sizeof (struct symbol
*)));
11379 VEC_free (symbolp
, template_args
);
11382 /* Attach fields and member functions to the type. */
11384 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
11387 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
11389 /* Get the type which refers to the base class (possibly this
11390 class itself) which contains the vtable pointer for the current
11391 class from the DW_AT_containing_type attribute. This use of
11392 DW_AT_containing_type is a GNU extension. */
11394 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
11396 struct type
*t
= die_containing_type (die
, cu
);
11398 TYPE_VPTR_BASETYPE (type
) = t
;
11403 /* Our own class provides vtbl ptr. */
11404 for (i
= TYPE_NFIELDS (t
) - 1;
11405 i
>= TYPE_N_BASECLASSES (t
);
11408 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
11410 if (is_vtable_name (fieldname
, cu
))
11412 TYPE_VPTR_FIELDNO (type
) = i
;
11417 /* Complain if virtual function table field not found. */
11418 if (i
< TYPE_N_BASECLASSES (t
))
11419 complaint (&symfile_complaints
,
11420 _("virtual function table pointer "
11421 "not found when defining class '%s'"),
11422 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
11427 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
11430 else if (cu
->producer
11431 && strncmp (cu
->producer
,
11432 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
11434 /* The IBM XLC compiler does not provide direct indication
11435 of the containing type, but the vtable pointer is
11436 always named __vfp. */
11440 for (i
= TYPE_NFIELDS (type
) - 1;
11441 i
>= TYPE_N_BASECLASSES (type
);
11444 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
11446 TYPE_VPTR_FIELDNO (type
) = i
;
11447 TYPE_VPTR_BASETYPE (type
) = type
;
11454 /* Copy fi.typedef_field_list linked list elements content into the
11455 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
11456 if (fi
.typedef_field_list
)
11458 int i
= fi
.typedef_field_list_count
;
11460 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
11461 TYPE_TYPEDEF_FIELD_ARRAY (type
)
11462 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
11463 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
11465 /* Reverse the list order to keep the debug info elements order. */
11468 struct typedef_field
*dest
, *src
;
11470 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
11471 src
= &fi
.typedef_field_list
->field
;
11472 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
11477 do_cleanups (back_to
);
11479 if (HAVE_CPLUS_STRUCT (type
))
11480 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
11483 quirk_gcc_member_function_pointer (type
, objfile
);
11485 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
11486 snapshots) has been known to create a die giving a declaration
11487 for a class that has, as a child, a die giving a definition for a
11488 nested class. So we have to process our children even if the
11489 current die is a declaration. Normally, of course, a declaration
11490 won't have any children at all. */
11492 while (child_die
!= NULL
&& child_die
->tag
)
11494 if (child_die
->tag
== DW_TAG_member
11495 || child_die
->tag
== DW_TAG_variable
11496 || child_die
->tag
== DW_TAG_inheritance
11497 || child_die
->tag
== DW_TAG_template_value_param
11498 || child_die
->tag
== DW_TAG_template_type_param
)
11503 process_die (child_die
, cu
);
11505 child_die
= sibling_die (child_die
);
11508 /* Do not consider external references. According to the DWARF standard,
11509 these DIEs are identified by the fact that they have no byte_size
11510 attribute, and a declaration attribute. */
11511 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
11512 || !die_is_declaration (die
, cu
))
11513 new_symbol (die
, type
, cu
);
11516 /* Given a DW_AT_enumeration_type die, set its type. We do not
11517 complete the type's fields yet, or create any symbols. */
11519 static struct type
*
11520 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11522 struct objfile
*objfile
= cu
->objfile
;
11524 struct attribute
*attr
;
11527 /* If the definition of this type lives in .debug_types, read that type.
11528 Don't follow DW_AT_specification though, that will take us back up
11529 the chain and we want to go down. */
11530 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
11533 struct dwarf2_cu
*type_cu
= cu
;
11534 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11536 type
= read_type_die (type_die
, type_cu
);
11538 /* TYPE_CU may not be the same as CU.
11539 Ensure TYPE is recorded in CU's type_hash table. */
11540 return set_die_type (die
, type
, cu
);
11543 type
= alloc_type (objfile
);
11545 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
11546 name
= dwarf2_full_name (NULL
, die
, cu
);
11548 TYPE_TAG_NAME (type
) = (char *) name
;
11550 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11553 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11557 TYPE_LENGTH (type
) = 0;
11560 /* The enumeration DIE can be incomplete. In Ada, any type can be
11561 declared as private in the package spec, and then defined only
11562 inside the package body. Such types are known as Taft Amendment
11563 Types. When another package uses such a type, an incomplete DIE
11564 may be generated by the compiler. */
11565 if (die_is_declaration (die
, cu
))
11566 TYPE_STUB (type
) = 1;
11568 return set_die_type (die
, type
, cu
);
11571 /* Given a pointer to a die which begins an enumeration, process all
11572 the dies that define the members of the enumeration, and create the
11573 symbol for the enumeration type.
11575 NOTE: We reverse the order of the element list. */
11578 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11580 struct type
*this_type
;
11582 this_type
= get_die_type (die
, cu
);
11583 if (this_type
== NULL
)
11584 this_type
= read_enumeration_type (die
, cu
);
11586 if (die
->child
!= NULL
)
11588 struct die_info
*child_die
;
11589 struct symbol
*sym
;
11590 struct field
*fields
= NULL
;
11591 int num_fields
= 0;
11592 int unsigned_enum
= 1;
11597 child_die
= die
->child
;
11598 while (child_die
&& child_die
->tag
)
11600 if (child_die
->tag
!= DW_TAG_enumerator
)
11602 process_die (child_die
, cu
);
11606 name
= dwarf2_name (child_die
, cu
);
11609 sym
= new_symbol (child_die
, this_type
, cu
);
11610 if (SYMBOL_VALUE (sym
) < 0)
11615 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
11618 mask
|= SYMBOL_VALUE (sym
);
11620 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
11622 fields
= (struct field
*)
11624 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
11625 * sizeof (struct field
));
11628 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
11629 FIELD_TYPE (fields
[num_fields
]) = NULL
;
11630 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
11631 FIELD_BITSIZE (fields
[num_fields
]) = 0;
11637 child_die
= sibling_die (child_die
);
11642 TYPE_NFIELDS (this_type
) = num_fields
;
11643 TYPE_FIELDS (this_type
) = (struct field
*)
11644 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
11645 memcpy (TYPE_FIELDS (this_type
), fields
,
11646 sizeof (struct field
) * num_fields
);
11650 TYPE_UNSIGNED (this_type
) = 1;
11652 TYPE_FLAG_ENUM (this_type
) = 1;
11655 /* If we are reading an enum from a .debug_types unit, and the enum
11656 is a declaration, and the enum is not the signatured type in the
11657 unit, then we do not want to add a symbol for it. Adding a
11658 symbol would in some cases obscure the true definition of the
11659 enum, giving users an incomplete type when the definition is
11660 actually available. Note that we do not want to do this for all
11661 enums which are just declarations, because C++0x allows forward
11662 enum declarations. */
11663 if (cu
->per_cu
->is_debug_types
11664 && die_is_declaration (die
, cu
))
11666 struct signatured_type
*sig_type
;
11669 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
11670 cu
->per_cu
->info_or_types_section
,
11671 cu
->per_cu
->offset
);
11672 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
11673 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
11677 new_symbol (die
, this_type
, cu
);
11680 /* Extract all information from a DW_TAG_array_type DIE and put it in
11681 the DIE's type field. For now, this only handles one dimensional
11684 static struct type
*
11685 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11687 struct objfile
*objfile
= cu
->objfile
;
11688 struct die_info
*child_die
;
11690 struct type
*element_type
, *range_type
, *index_type
;
11691 struct type
**range_types
= NULL
;
11692 struct attribute
*attr
;
11694 struct cleanup
*back_to
;
11697 element_type
= die_type (die
, cu
);
11699 /* The die_type call above may have already set the type for this DIE. */
11700 type
= get_die_type (die
, cu
);
11704 /* Irix 6.2 native cc creates array types without children for
11705 arrays with unspecified length. */
11706 if (die
->child
== NULL
)
11708 index_type
= objfile_type (objfile
)->builtin_int
;
11709 range_type
= create_range_type (NULL
, index_type
, 0, -1);
11710 type
= create_array_type (NULL
, element_type
, range_type
);
11711 return set_die_type (die
, type
, cu
);
11714 back_to
= make_cleanup (null_cleanup
, NULL
);
11715 child_die
= die
->child
;
11716 while (child_die
&& child_die
->tag
)
11718 if (child_die
->tag
== DW_TAG_subrange_type
)
11720 struct type
*child_type
= read_type_die (child_die
, cu
);
11722 if (child_type
!= NULL
)
11724 /* The range type was succesfully read. Save it for the
11725 array type creation. */
11726 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
11728 range_types
= (struct type
**)
11729 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
11730 * sizeof (struct type
*));
11732 make_cleanup (free_current_contents
, &range_types
);
11734 range_types
[ndim
++] = child_type
;
11737 child_die
= sibling_die (child_die
);
11740 /* Dwarf2 dimensions are output from left to right, create the
11741 necessary array types in backwards order. */
11743 type
= element_type
;
11745 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
11750 type
= create_array_type (NULL
, type
, range_types
[i
++]);
11755 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
11758 /* Understand Dwarf2 support for vector types (like they occur on
11759 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
11760 array type. This is not part of the Dwarf2/3 standard yet, but a
11761 custom vendor extension. The main difference between a regular
11762 array and the vector variant is that vectors are passed by value
11764 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
11766 make_vector_type (type
);
11768 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
11769 implementation may choose to implement triple vectors using this
11771 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11774 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
11775 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11777 complaint (&symfile_complaints
,
11778 _("DW_AT_byte_size for array type smaller "
11779 "than the total size of elements"));
11782 name
= dwarf2_name (die
, cu
);
11784 TYPE_NAME (type
) = name
;
11786 /* Install the type in the die. */
11787 set_die_type (die
, type
, cu
);
11789 /* set_die_type should be already done. */
11790 set_descriptive_type (type
, die
, cu
);
11792 do_cleanups (back_to
);
11797 static enum dwarf_array_dim_ordering
11798 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11800 struct attribute
*attr
;
11802 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11804 if (attr
) return DW_SND (attr
);
11806 /* GNU F77 is a special case, as at 08/2004 array type info is the
11807 opposite order to the dwarf2 specification, but data is still
11808 laid out as per normal fortran.
11810 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11811 version checking. */
11813 if (cu
->language
== language_fortran
11814 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11816 return DW_ORD_row_major
;
11819 switch (cu
->language_defn
->la_array_ordering
)
11821 case array_column_major
:
11822 return DW_ORD_col_major
;
11823 case array_row_major
:
11825 return DW_ORD_row_major
;
11829 /* Extract all information from a DW_TAG_set_type DIE and put it in
11830 the DIE's type field. */
11832 static struct type
*
11833 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11835 struct type
*domain_type
, *set_type
;
11836 struct attribute
*attr
;
11838 domain_type
= die_type (die
, cu
);
11840 /* The die_type call above may have already set the type for this DIE. */
11841 set_type
= get_die_type (die
, cu
);
11845 set_type
= create_set_type (NULL
, domain_type
);
11847 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11849 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11851 return set_die_type (die
, set_type
, cu
);
11854 /* A helper for read_common_block that creates a locexpr baton.
11855 SYM is the symbol which we are marking as computed.
11856 COMMON_DIE is the DIE for the common block.
11857 COMMON_LOC is the location expression attribute for the common
11859 MEMBER_LOC is the location expression attribute for the particular
11860 member of the common block that we are processing.
11861 CU is the CU from which the above come. */
11864 mark_common_block_symbol_computed (struct symbol
*sym
,
11865 struct die_info
*common_die
,
11866 struct attribute
*common_loc
,
11867 struct attribute
*member_loc
,
11868 struct dwarf2_cu
*cu
)
11870 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11871 struct dwarf2_locexpr_baton
*baton
;
11873 unsigned int cu_off
;
11874 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
11875 LONGEST offset
= 0;
11877 gdb_assert (common_loc
&& member_loc
);
11878 gdb_assert (attr_form_is_block (common_loc
));
11879 gdb_assert (attr_form_is_block (member_loc
)
11880 || attr_form_is_constant (member_loc
));
11882 baton
= obstack_alloc (&objfile
->objfile_obstack
,
11883 sizeof (struct dwarf2_locexpr_baton
));
11884 baton
->per_cu
= cu
->per_cu
;
11885 gdb_assert (baton
->per_cu
);
11887 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
11889 if (attr_form_is_constant (member_loc
))
11891 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
11892 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
11895 baton
->size
+= DW_BLOCK (member_loc
)->size
;
11897 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
11900 *ptr
++ = DW_OP_call4
;
11901 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
11902 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
11905 if (attr_form_is_constant (member_loc
))
11907 *ptr
++ = DW_OP_addr
;
11908 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
11909 ptr
+= cu
->header
.addr_size
;
11913 /* We have to copy the data here, because DW_OP_call4 will only
11914 use a DW_AT_location attribute. */
11915 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
11916 ptr
+= DW_BLOCK (member_loc
)->size
;
11919 *ptr
++ = DW_OP_plus
;
11920 gdb_assert (ptr
- baton
->data
== baton
->size
);
11922 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11923 SYMBOL_LOCATION_BATON (sym
) = baton
;
11924 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11927 /* Create appropriate locally-scoped variables for all the
11928 DW_TAG_common_block entries. Also create a struct common_block
11929 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11930 is used to sepate the common blocks name namespace from regular
11934 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11936 struct attribute
*attr
;
11938 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11941 /* Support the .debug_loc offsets. */
11942 if (attr_form_is_block (attr
))
11946 else if (attr_form_is_section_offset (attr
))
11948 dwarf2_complex_location_expr_complaint ();
11953 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11954 "common block member");
11959 if (die
->child
!= NULL
)
11961 struct objfile
*objfile
= cu
->objfile
;
11962 struct die_info
*child_die
;
11963 size_t n_entries
= 0, size
;
11964 struct common_block
*common_block
;
11965 struct symbol
*sym
;
11967 for (child_die
= die
->child
;
11968 child_die
&& child_die
->tag
;
11969 child_die
= sibling_die (child_die
))
11972 size
= (sizeof (struct common_block
)
11973 + (n_entries
- 1) * sizeof (struct symbol
*));
11974 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
11975 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
11976 common_block
->n_entries
= 0;
11978 for (child_die
= die
->child
;
11979 child_die
&& child_die
->tag
;
11980 child_die
= sibling_die (child_die
))
11982 /* Create the symbol in the DW_TAG_common_block block in the current
11984 sym
= new_symbol (child_die
, NULL
, cu
);
11987 struct attribute
*member_loc
;
11989 common_block
->contents
[common_block
->n_entries
++] = sym
;
11991 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
11995 /* GDB has handled this for a long time, but it is
11996 not specified by DWARF. It seems to have been
11997 emitted by gfortran at least as recently as:
11998 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
11999 complaint (&symfile_complaints
,
12000 _("Variable in common block has "
12001 "DW_AT_data_member_location "
12002 "- DIE at 0x%x [in module %s]"),
12003 child_die
->offset
.sect_off
, cu
->objfile
->name
);
12005 if (attr_form_is_section_offset (member_loc
))
12006 dwarf2_complex_location_expr_complaint ();
12007 else if (attr_form_is_constant (member_loc
)
12008 || attr_form_is_block (member_loc
))
12011 mark_common_block_symbol_computed (sym
, die
, attr
,
12015 dwarf2_complex_location_expr_complaint ();
12020 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
12021 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
12025 /* Create a type for a C++ namespace. */
12027 static struct type
*
12028 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12030 struct objfile
*objfile
= cu
->objfile
;
12031 const char *previous_prefix
, *name
;
12035 /* For extensions, reuse the type of the original namespace. */
12036 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
12038 struct die_info
*ext_die
;
12039 struct dwarf2_cu
*ext_cu
= cu
;
12041 ext_die
= dwarf2_extension (die
, &ext_cu
);
12042 type
= read_type_die (ext_die
, ext_cu
);
12044 /* EXT_CU may not be the same as CU.
12045 Ensure TYPE is recorded in CU's type_hash table. */
12046 return set_die_type (die
, type
, cu
);
12049 name
= namespace_name (die
, &is_anonymous
, cu
);
12051 /* Now build the name of the current namespace. */
12053 previous_prefix
= determine_prefix (die
, cu
);
12054 if (previous_prefix
[0] != '\0')
12055 name
= typename_concat (&objfile
->objfile_obstack
,
12056 previous_prefix
, name
, 0, cu
);
12058 /* Create the type. */
12059 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
12061 TYPE_NAME (type
) = (char *) name
;
12062 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12064 return set_die_type (die
, type
, cu
);
12067 /* Read a C++ namespace. */
12070 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
12072 struct objfile
*objfile
= cu
->objfile
;
12075 /* Add a symbol associated to this if we haven't seen the namespace
12076 before. Also, add a using directive if it's an anonymous
12079 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
12083 type
= read_type_die (die
, cu
);
12084 new_symbol (die
, type
, cu
);
12086 namespace_name (die
, &is_anonymous
, cu
);
12089 const char *previous_prefix
= determine_prefix (die
, cu
);
12091 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
12092 NULL
, NULL
, &objfile
->objfile_obstack
);
12096 if (die
->child
!= NULL
)
12098 struct die_info
*child_die
= die
->child
;
12100 while (child_die
&& child_die
->tag
)
12102 process_die (child_die
, cu
);
12103 child_die
= sibling_die (child_die
);
12108 /* Read a Fortran module as type. This DIE can be only a declaration used for
12109 imported module. Still we need that type as local Fortran "use ... only"
12110 declaration imports depend on the created type in determine_prefix. */
12112 static struct type
*
12113 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12115 struct objfile
*objfile
= cu
->objfile
;
12119 module_name
= dwarf2_name (die
, cu
);
12121 complaint (&symfile_complaints
,
12122 _("DW_TAG_module has no name, offset 0x%x"),
12123 die
->offset
.sect_off
);
12124 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
12126 /* determine_prefix uses TYPE_TAG_NAME. */
12127 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
12129 return set_die_type (die
, type
, cu
);
12132 /* Read a Fortran module. */
12135 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
12137 struct die_info
*child_die
= die
->child
;
12139 while (child_die
&& child_die
->tag
)
12141 process_die (child_die
, cu
);
12142 child_die
= sibling_die (child_die
);
12146 /* Return the name of the namespace represented by DIE. Set
12147 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
12150 static const char *
12151 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
12153 struct die_info
*current_die
;
12154 const char *name
= NULL
;
12156 /* Loop through the extensions until we find a name. */
12158 for (current_die
= die
;
12159 current_die
!= NULL
;
12160 current_die
= dwarf2_extension (die
, &cu
))
12162 name
= dwarf2_name (current_die
, cu
);
12167 /* Is it an anonymous namespace? */
12169 *is_anonymous
= (name
== NULL
);
12171 name
= CP_ANONYMOUS_NAMESPACE_STR
;
12176 /* Extract all information from a DW_TAG_pointer_type DIE and add to
12177 the user defined type vector. */
12179 static struct type
*
12180 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12182 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
12183 struct comp_unit_head
*cu_header
= &cu
->header
;
12185 struct attribute
*attr_byte_size
;
12186 struct attribute
*attr_address_class
;
12187 int byte_size
, addr_class
;
12188 struct type
*target_type
;
12190 target_type
= die_type (die
, cu
);
12192 /* The die_type call above may have already set the type for this DIE. */
12193 type
= get_die_type (die
, cu
);
12197 type
= lookup_pointer_type (target_type
);
12199 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12200 if (attr_byte_size
)
12201 byte_size
= DW_UNSND (attr_byte_size
);
12203 byte_size
= cu_header
->addr_size
;
12205 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
12206 if (attr_address_class
)
12207 addr_class
= DW_UNSND (attr_address_class
);
12209 addr_class
= DW_ADDR_none
;
12211 /* If the pointer size or address class is different than the
12212 default, create a type variant marked as such and set the
12213 length accordingly. */
12214 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
12216 if (gdbarch_address_class_type_flags_p (gdbarch
))
12220 type_flags
= gdbarch_address_class_type_flags
12221 (gdbarch
, byte_size
, addr_class
);
12222 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
12224 type
= make_type_with_address_space (type
, type_flags
);
12226 else if (TYPE_LENGTH (type
) != byte_size
)
12228 complaint (&symfile_complaints
,
12229 _("invalid pointer size %d"), byte_size
);
12233 /* Should we also complain about unhandled address classes? */
12237 TYPE_LENGTH (type
) = byte_size
;
12238 return set_die_type (die
, type
, cu
);
12241 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
12242 the user defined type vector. */
12244 static struct type
*
12245 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12248 struct type
*to_type
;
12249 struct type
*domain
;
12251 to_type
= die_type (die
, cu
);
12252 domain
= die_containing_type (die
, cu
);
12254 /* The calls above may have already set the type for this DIE. */
12255 type
= get_die_type (die
, cu
);
12259 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
12260 type
= lookup_methodptr_type (to_type
);
12262 type
= lookup_memberptr_type (to_type
, domain
);
12264 return set_die_type (die
, type
, cu
);
12267 /* Extract all information from a DW_TAG_reference_type DIE and add to
12268 the user defined type vector. */
12270 static struct type
*
12271 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12273 struct comp_unit_head
*cu_header
= &cu
->header
;
12274 struct type
*type
, *target_type
;
12275 struct attribute
*attr
;
12277 target_type
= die_type (die
, cu
);
12279 /* The die_type call above may have already set the type for this DIE. */
12280 type
= get_die_type (die
, cu
);
12284 type
= lookup_reference_type (target_type
);
12285 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12288 TYPE_LENGTH (type
) = DW_UNSND (attr
);
12292 TYPE_LENGTH (type
) = cu_header
->addr_size
;
12294 return set_die_type (die
, type
, cu
);
12297 static struct type
*
12298 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12300 struct type
*base_type
, *cv_type
;
12302 base_type
= die_type (die
, cu
);
12304 /* The die_type call above may have already set the type for this DIE. */
12305 cv_type
= get_die_type (die
, cu
);
12309 /* In case the const qualifier is applied to an array type, the element type
12310 is so qualified, not the array type (section 6.7.3 of C99). */
12311 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
12313 struct type
*el_type
, *inner_array
;
12315 base_type
= copy_type (base_type
);
12316 inner_array
= base_type
;
12318 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
12320 TYPE_TARGET_TYPE (inner_array
) =
12321 copy_type (TYPE_TARGET_TYPE (inner_array
));
12322 inner_array
= TYPE_TARGET_TYPE (inner_array
);
12325 el_type
= TYPE_TARGET_TYPE (inner_array
);
12326 TYPE_TARGET_TYPE (inner_array
) =
12327 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
12329 return set_die_type (die
, base_type
, cu
);
12332 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
12333 return set_die_type (die
, cv_type
, cu
);
12336 static struct type
*
12337 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12339 struct type
*base_type
, *cv_type
;
12341 base_type
= die_type (die
, cu
);
12343 /* The die_type call above may have already set the type for this DIE. */
12344 cv_type
= get_die_type (die
, cu
);
12348 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
12349 return set_die_type (die
, cv_type
, cu
);
12352 /* Handle DW_TAG_restrict_type. */
12354 static struct type
*
12355 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12357 struct type
*base_type
, *cv_type
;
12359 base_type
= die_type (die
, cu
);
12361 /* The die_type call above may have already set the type for this DIE. */
12362 cv_type
= get_die_type (die
, cu
);
12366 cv_type
= make_restrict_type (base_type
);
12367 return set_die_type (die
, cv_type
, cu
);
12370 /* Extract all information from a DW_TAG_string_type DIE and add to
12371 the user defined type vector. It isn't really a user defined type,
12372 but it behaves like one, with other DIE's using an AT_user_def_type
12373 attribute to reference it. */
12375 static struct type
*
12376 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12378 struct objfile
*objfile
= cu
->objfile
;
12379 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12380 struct type
*type
, *range_type
, *index_type
, *char_type
;
12381 struct attribute
*attr
;
12382 unsigned int length
;
12384 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
12387 length
= DW_UNSND (attr
);
12391 /* Check for the DW_AT_byte_size attribute. */
12392 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12395 length
= DW_UNSND (attr
);
12403 index_type
= objfile_type (objfile
)->builtin_int
;
12404 range_type
= create_range_type (NULL
, index_type
, 1, length
);
12405 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
12406 type
= create_string_type (NULL
, char_type
, range_type
);
12408 return set_die_type (die
, type
, cu
);
12411 /* Handle DIES due to C code like:
12415 int (*funcp)(int a, long l);
12419 ('funcp' generates a DW_TAG_subroutine_type DIE). */
12421 static struct type
*
12422 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12424 struct objfile
*objfile
= cu
->objfile
;
12425 struct type
*type
; /* Type that this function returns. */
12426 struct type
*ftype
; /* Function that returns above type. */
12427 struct attribute
*attr
;
12429 type
= die_type (die
, cu
);
12431 /* The die_type call above may have already set the type for this DIE. */
12432 ftype
= get_die_type (die
, cu
);
12436 ftype
= lookup_function_type (type
);
12438 /* All functions in C++, Pascal and Java have prototypes. */
12439 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
12440 if ((attr
&& (DW_UNSND (attr
) != 0))
12441 || cu
->language
== language_cplus
12442 || cu
->language
== language_java
12443 || cu
->language
== language_pascal
)
12444 TYPE_PROTOTYPED (ftype
) = 1;
12445 else if (producer_is_realview (cu
->producer
))
12446 /* RealView does not emit DW_AT_prototyped. We can not
12447 distinguish prototyped and unprototyped functions; default to
12448 prototyped, since that is more common in modern code (and
12449 RealView warns about unprototyped functions). */
12450 TYPE_PROTOTYPED (ftype
) = 1;
12452 /* Store the calling convention in the type if it's available in
12453 the subroutine die. Otherwise set the calling convention to
12454 the default value DW_CC_normal. */
12455 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
12457 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
12458 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
12459 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
12461 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
12463 /* We need to add the subroutine type to the die immediately so
12464 we don't infinitely recurse when dealing with parameters
12465 declared as the same subroutine type. */
12466 set_die_type (die
, ftype
, cu
);
12468 if (die
->child
!= NULL
)
12470 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
12471 struct die_info
*child_die
;
12472 int nparams
, iparams
;
12474 /* Count the number of parameters.
12475 FIXME: GDB currently ignores vararg functions, but knows about
12476 vararg member functions. */
12478 child_die
= die
->child
;
12479 while (child_die
&& child_die
->tag
)
12481 if (child_die
->tag
== DW_TAG_formal_parameter
)
12483 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
12484 TYPE_VARARGS (ftype
) = 1;
12485 child_die
= sibling_die (child_die
);
12488 /* Allocate storage for parameters and fill them in. */
12489 TYPE_NFIELDS (ftype
) = nparams
;
12490 TYPE_FIELDS (ftype
) = (struct field
*)
12491 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
12493 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
12494 even if we error out during the parameters reading below. */
12495 for (iparams
= 0; iparams
< nparams
; iparams
++)
12496 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
12499 child_die
= die
->child
;
12500 while (child_die
&& child_die
->tag
)
12502 if (child_die
->tag
== DW_TAG_formal_parameter
)
12504 struct type
*arg_type
;
12506 /* DWARF version 2 has no clean way to discern C++
12507 static and non-static member functions. G++ helps
12508 GDB by marking the first parameter for non-static
12509 member functions (which is the this pointer) as
12510 artificial. We pass this information to
12511 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
12513 DWARF version 3 added DW_AT_object_pointer, which GCC
12514 4.5 does not yet generate. */
12515 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
12517 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
12520 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
12522 /* GCC/43521: In java, the formal parameter
12523 "this" is sometimes not marked with DW_AT_artificial. */
12524 if (cu
->language
== language_java
)
12526 const char *name
= dwarf2_name (child_die
, cu
);
12528 if (name
&& !strcmp (name
, "this"))
12529 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
12532 arg_type
= die_type (child_die
, cu
);
12534 /* RealView does not mark THIS as const, which the testsuite
12535 expects. GCC marks THIS as const in method definitions,
12536 but not in the class specifications (GCC PR 43053). */
12537 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
12538 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
12541 struct dwarf2_cu
*arg_cu
= cu
;
12542 const char *name
= dwarf2_name (child_die
, cu
);
12544 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
12547 /* If the compiler emits this, use it. */
12548 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
12551 else if (name
&& strcmp (name
, "this") == 0)
12552 /* Function definitions will have the argument names. */
12554 else if (name
== NULL
&& iparams
== 0)
12555 /* Declarations may not have the names, so like
12556 elsewhere in GDB, assume an artificial first
12557 argument is "this". */
12561 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
12565 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
12568 child_die
= sibling_die (child_die
);
12575 static struct type
*
12576 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
12578 struct objfile
*objfile
= cu
->objfile
;
12579 const char *name
= NULL
;
12580 struct type
*this_type
, *target_type
;
12582 name
= dwarf2_full_name (NULL
, die
, cu
);
12583 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
12584 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
12585 TYPE_NAME (this_type
) = (char *) name
;
12586 set_die_type (die
, this_type
, cu
);
12587 target_type
= die_type (die
, cu
);
12588 if (target_type
!= this_type
)
12589 TYPE_TARGET_TYPE (this_type
) = target_type
;
12592 /* Self-referential typedefs are, it seems, not allowed by the DWARF
12593 spec and cause infinite loops in GDB. */
12594 complaint (&symfile_complaints
,
12595 _("Self-referential DW_TAG_typedef "
12596 "- DIE at 0x%x [in module %s]"),
12597 die
->offset
.sect_off
, objfile
->name
);
12598 TYPE_TARGET_TYPE (this_type
) = NULL
;
12603 /* Find a representation of a given base type and install
12604 it in the TYPE field of the die. */
12606 static struct type
*
12607 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12609 struct objfile
*objfile
= cu
->objfile
;
12611 struct attribute
*attr
;
12612 int encoding
= 0, size
= 0;
12614 enum type_code code
= TYPE_CODE_INT
;
12615 int type_flags
= 0;
12616 struct type
*target_type
= NULL
;
12618 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
12621 encoding
= DW_UNSND (attr
);
12623 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12626 size
= DW_UNSND (attr
);
12628 name
= dwarf2_name (die
, cu
);
12631 complaint (&symfile_complaints
,
12632 _("DW_AT_name missing from DW_TAG_base_type"));
12637 case DW_ATE_address
:
12638 /* Turn DW_ATE_address into a void * pointer. */
12639 code
= TYPE_CODE_PTR
;
12640 type_flags
|= TYPE_FLAG_UNSIGNED
;
12641 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
12643 case DW_ATE_boolean
:
12644 code
= TYPE_CODE_BOOL
;
12645 type_flags
|= TYPE_FLAG_UNSIGNED
;
12647 case DW_ATE_complex_float
:
12648 code
= TYPE_CODE_COMPLEX
;
12649 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
12651 case DW_ATE_decimal_float
:
12652 code
= TYPE_CODE_DECFLOAT
;
12655 code
= TYPE_CODE_FLT
;
12657 case DW_ATE_signed
:
12659 case DW_ATE_unsigned
:
12660 type_flags
|= TYPE_FLAG_UNSIGNED
;
12661 if (cu
->language
== language_fortran
12663 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
12664 code
= TYPE_CODE_CHAR
;
12666 case DW_ATE_signed_char
:
12667 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12668 || cu
->language
== language_pascal
12669 || cu
->language
== language_fortran
)
12670 code
= TYPE_CODE_CHAR
;
12672 case DW_ATE_unsigned_char
:
12673 if (cu
->language
== language_ada
|| cu
->language
== language_m2
12674 || cu
->language
== language_pascal
12675 || cu
->language
== language_fortran
)
12676 code
= TYPE_CODE_CHAR
;
12677 type_flags
|= TYPE_FLAG_UNSIGNED
;
12680 /* We just treat this as an integer and then recognize the
12681 type by name elsewhere. */
12685 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
12686 dwarf_type_encoding_name (encoding
));
12690 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
12691 TYPE_NAME (type
) = name
;
12692 TYPE_TARGET_TYPE (type
) = target_type
;
12694 if (name
&& strcmp (name
, "char") == 0)
12695 TYPE_NOSIGN (type
) = 1;
12697 return set_die_type (die
, type
, cu
);
12700 /* Read the given DW_AT_subrange DIE. */
12702 static struct type
*
12703 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12705 struct type
*base_type
;
12706 struct type
*range_type
;
12707 struct attribute
*attr
;
12709 int low_default_is_valid
;
12711 LONGEST negative_mask
;
12713 base_type
= die_type (die
, cu
);
12714 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
12715 check_typedef (base_type
);
12717 /* The die_type call above may have already set the type for this DIE. */
12718 range_type
= get_die_type (die
, cu
);
12722 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
12723 omitting DW_AT_lower_bound. */
12724 switch (cu
->language
)
12727 case language_cplus
:
12729 low_default_is_valid
= 1;
12731 case language_fortran
:
12733 low_default_is_valid
= 1;
12736 case language_java
:
12737 case language_objc
:
12739 low_default_is_valid
= (cu
->header
.version
>= 4);
12743 case language_pascal
:
12745 low_default_is_valid
= (cu
->header
.version
>= 4);
12749 low_default_is_valid
= 0;
12753 /* FIXME: For variable sized arrays either of these could be
12754 a variable rather than a constant value. We'll allow it,
12755 but we don't know how to handle it. */
12756 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
12758 low
= dwarf2_get_attr_constant_value (attr
, low
);
12759 else if (!low_default_is_valid
)
12760 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
12761 "- DIE at 0x%x [in module %s]"),
12762 die
->offset
.sect_off
, cu
->objfile
->name
);
12764 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
12767 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
12769 /* GCC encodes arrays with unspecified or dynamic length
12770 with a DW_FORM_block1 attribute or a reference attribute.
12771 FIXME: GDB does not yet know how to handle dynamic
12772 arrays properly, treat them as arrays with unspecified
12775 FIXME: jimb/2003-09-22: GDB does not really know
12776 how to handle arrays of unspecified length
12777 either; we just represent them as zero-length
12778 arrays. Choose an appropriate upper bound given
12779 the lower bound we've computed above. */
12783 high
= dwarf2_get_attr_constant_value (attr
, 1);
12787 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
12790 int count
= dwarf2_get_attr_constant_value (attr
, 1);
12791 high
= low
+ count
- 1;
12795 /* Unspecified array length. */
12800 /* Dwarf-2 specifications explicitly allows to create subrange types
12801 without specifying a base type.
12802 In that case, the base type must be set to the type of
12803 the lower bound, upper bound or count, in that order, if any of these
12804 three attributes references an object that has a type.
12805 If no base type is found, the Dwarf-2 specifications say that
12806 a signed integer type of size equal to the size of an address should
12808 For the following C code: `extern char gdb_int [];'
12809 GCC produces an empty range DIE.
12810 FIXME: muller/2010-05-28: Possible references to object for low bound,
12811 high bound or count are not yet handled by this code. */
12812 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
12814 struct objfile
*objfile
= cu
->objfile
;
12815 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12816 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
12817 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
12819 /* Test "int", "long int", and "long long int" objfile types,
12820 and select the first one having a size above or equal to the
12821 architecture address size. */
12822 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12823 base_type
= int_type
;
12826 int_type
= objfile_type (objfile
)->builtin_long
;
12827 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12828 base_type
= int_type
;
12831 int_type
= objfile_type (objfile
)->builtin_long_long
;
12832 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
12833 base_type
= int_type
;
12839 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
12840 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
12841 low
|= negative_mask
;
12842 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
12843 high
|= negative_mask
;
12845 range_type
= create_range_type (NULL
, base_type
, low
, high
);
12847 /* Mark arrays with dynamic length at least as an array of unspecified
12848 length. GDB could check the boundary but before it gets implemented at
12849 least allow accessing the array elements. */
12850 if (attr
&& attr_form_is_block (attr
))
12851 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12853 /* Ada expects an empty array on no boundary attributes. */
12854 if (attr
== NULL
&& cu
->language
!= language_ada
)
12855 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
12857 name
= dwarf2_name (die
, cu
);
12859 TYPE_NAME (range_type
) = name
;
12861 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12863 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
12865 set_die_type (die
, range_type
, cu
);
12867 /* set_die_type should be already done. */
12868 set_descriptive_type (range_type
, die
, cu
);
12873 static struct type
*
12874 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12878 /* For now, we only support the C meaning of an unspecified type: void. */
12880 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
12881 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
12883 return set_die_type (die
, type
, cu
);
12886 /* Read a single die and all its descendents. Set the die's sibling
12887 field to NULL; set other fields in the die correctly, and set all
12888 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
12889 location of the info_ptr after reading all of those dies. PARENT
12890 is the parent of the die in question. */
12892 static struct die_info
*
12893 read_die_and_children (const struct die_reader_specs
*reader
,
12894 gdb_byte
*info_ptr
,
12895 gdb_byte
**new_info_ptr
,
12896 struct die_info
*parent
)
12898 struct die_info
*die
;
12902 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
12905 *new_info_ptr
= cur_ptr
;
12908 store_in_ref_table (die
, reader
->cu
);
12911 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
12915 *new_info_ptr
= cur_ptr
;
12918 die
->sibling
= NULL
;
12919 die
->parent
= parent
;
12923 /* Read a die, all of its descendents, and all of its siblings; set
12924 all of the fields of all of the dies correctly. Arguments are as
12925 in read_die_and_children. */
12927 static struct die_info
*
12928 read_die_and_siblings (const struct die_reader_specs
*reader
,
12929 gdb_byte
*info_ptr
,
12930 gdb_byte
**new_info_ptr
,
12931 struct die_info
*parent
)
12933 struct die_info
*first_die
, *last_sibling
;
12936 cur_ptr
= info_ptr
;
12937 first_die
= last_sibling
= NULL
;
12941 struct die_info
*die
12942 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12946 *new_info_ptr
= cur_ptr
;
12953 last_sibling
->sibling
= die
;
12955 last_sibling
= die
;
12959 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12961 The caller is responsible for filling in the extra attributes
12962 and updating (*DIEP)->num_attrs.
12963 Set DIEP to point to a newly allocated die with its information,
12964 except for its child, sibling, and parent fields.
12965 Set HAS_CHILDREN to tell whether the die has children or not. */
12968 read_full_die_1 (const struct die_reader_specs
*reader
,
12969 struct die_info
**diep
, gdb_byte
*info_ptr
,
12970 int *has_children
, int num_extra_attrs
)
12972 unsigned int abbrev_number
, bytes_read
, i
;
12973 sect_offset offset
;
12974 struct abbrev_info
*abbrev
;
12975 struct die_info
*die
;
12976 struct dwarf2_cu
*cu
= reader
->cu
;
12977 bfd
*abfd
= reader
->abfd
;
12979 offset
.sect_off
= info_ptr
- reader
->buffer
;
12980 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12981 info_ptr
+= bytes_read
;
12982 if (!abbrev_number
)
12989 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
12991 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
12993 bfd_get_filename (abfd
));
12995 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
12996 die
->offset
= offset
;
12997 die
->tag
= abbrev
->tag
;
12998 die
->abbrev
= abbrev_number
;
13000 /* Make the result usable.
13001 The caller needs to update num_attrs after adding the extra
13003 die
->num_attrs
= abbrev
->num_attrs
;
13005 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13006 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
13010 *has_children
= abbrev
->has_children
;
13014 /* Read a die and all its attributes.
13015 Set DIEP to point to a newly allocated die with its information,
13016 except for its child, sibling, and parent fields.
13017 Set HAS_CHILDREN to tell whether the die has children or not. */
13020 read_full_die (const struct die_reader_specs
*reader
,
13021 struct die_info
**diep
, gdb_byte
*info_ptr
,
13024 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
13027 /* Abbreviation tables.
13029 In DWARF version 2, the description of the debugging information is
13030 stored in a separate .debug_abbrev section. Before we read any
13031 dies from a section we read in all abbreviations and install them
13032 in a hash table. */
13034 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
13036 static struct abbrev_info
*
13037 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
13039 struct abbrev_info
*abbrev
;
13041 abbrev
= (struct abbrev_info
*)
13042 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
13043 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13047 /* Add an abbreviation to the table. */
13050 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
13051 unsigned int abbrev_number
,
13052 struct abbrev_info
*abbrev
)
13054 unsigned int hash_number
;
13056 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13057 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
13058 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
13061 /* Look up an abbrev in the table.
13062 Returns NULL if the abbrev is not found. */
13064 static struct abbrev_info
*
13065 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
13066 unsigned int abbrev_number
)
13068 unsigned int hash_number
;
13069 struct abbrev_info
*abbrev
;
13071 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
13072 abbrev
= abbrev_table
->abbrevs
[hash_number
];
13076 if (abbrev
->number
== abbrev_number
)
13078 abbrev
= abbrev
->next
;
13083 /* Read in an abbrev table. */
13085 static struct abbrev_table
*
13086 abbrev_table_read_table (struct dwarf2_section_info
*section
,
13087 sect_offset offset
)
13089 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13090 bfd
*abfd
= section
->asection
->owner
;
13091 struct abbrev_table
*abbrev_table
;
13092 gdb_byte
*abbrev_ptr
;
13093 struct abbrev_info
*cur_abbrev
;
13094 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
13095 unsigned int abbrev_form
;
13096 struct attr_abbrev
*cur_attrs
;
13097 unsigned int allocated_attrs
;
13099 abbrev_table
= XMALLOC (struct abbrev_table
);
13100 abbrev_table
->offset
= offset
;
13101 obstack_init (&abbrev_table
->abbrev_obstack
);
13102 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13104 * sizeof (struct abbrev_info
*)));
13105 memset (abbrev_table
->abbrevs
, 0,
13106 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
13108 dwarf2_read_section (objfile
, section
);
13109 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
13110 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13111 abbrev_ptr
+= bytes_read
;
13113 allocated_attrs
= ATTR_ALLOC_CHUNK
;
13114 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
13116 /* Loop until we reach an abbrev number of 0. */
13117 while (abbrev_number
)
13119 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
13121 /* read in abbrev header */
13122 cur_abbrev
->number
= abbrev_number
;
13123 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13124 abbrev_ptr
+= bytes_read
;
13125 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
13128 /* now read in declarations */
13129 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13130 abbrev_ptr
+= bytes_read
;
13131 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13132 abbrev_ptr
+= bytes_read
;
13133 while (abbrev_name
)
13135 if (cur_abbrev
->num_attrs
== allocated_attrs
)
13137 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
13139 = xrealloc (cur_attrs
, (allocated_attrs
13140 * sizeof (struct attr_abbrev
)));
13143 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
13144 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
13145 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13146 abbrev_ptr
+= bytes_read
;
13147 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13148 abbrev_ptr
+= bytes_read
;
13151 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
13152 (cur_abbrev
->num_attrs
13153 * sizeof (struct attr_abbrev
)));
13154 memcpy (cur_abbrev
->attrs
, cur_attrs
,
13155 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
13157 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
13159 /* Get next abbreviation.
13160 Under Irix6 the abbreviations for a compilation unit are not
13161 always properly terminated with an abbrev number of 0.
13162 Exit loop if we encounter an abbreviation which we have
13163 already read (which means we are about to read the abbreviations
13164 for the next compile unit) or if the end of the abbreviation
13165 table is reached. */
13166 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
13168 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
13169 abbrev_ptr
+= bytes_read
;
13170 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
13175 return abbrev_table
;
13178 /* Free the resources held by ABBREV_TABLE. */
13181 abbrev_table_free (struct abbrev_table
*abbrev_table
)
13183 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
13184 xfree (abbrev_table
);
13187 /* Same as abbrev_table_free but as a cleanup.
13188 We pass in a pointer to the pointer to the table so that we can
13189 set the pointer to NULL when we're done. It also simplifies
13190 build_type_unit_groups. */
13193 abbrev_table_free_cleanup (void *table_ptr
)
13195 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
13197 if (*abbrev_table_ptr
!= NULL
)
13198 abbrev_table_free (*abbrev_table_ptr
);
13199 *abbrev_table_ptr
= NULL
;
13202 /* Read the abbrev table for CU from ABBREV_SECTION. */
13205 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
13206 struct dwarf2_section_info
*abbrev_section
)
13209 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
13212 /* Release the memory used by the abbrev table for a compilation unit. */
13215 dwarf2_free_abbrev_table (void *ptr_to_cu
)
13217 struct dwarf2_cu
*cu
= ptr_to_cu
;
13219 abbrev_table_free (cu
->abbrev_table
);
13220 /* Set this to NULL so that we SEGV if we try to read it later,
13221 and also because free_comp_unit verifies this is NULL. */
13222 cu
->abbrev_table
= NULL
;
13225 /* Returns nonzero if TAG represents a type that we might generate a partial
13229 is_type_tag_for_partial (int tag
)
13234 /* Some types that would be reasonable to generate partial symbols for,
13235 that we don't at present. */
13236 case DW_TAG_array_type
:
13237 case DW_TAG_file_type
:
13238 case DW_TAG_ptr_to_member_type
:
13239 case DW_TAG_set_type
:
13240 case DW_TAG_string_type
:
13241 case DW_TAG_subroutine_type
:
13243 case DW_TAG_base_type
:
13244 case DW_TAG_class_type
:
13245 case DW_TAG_interface_type
:
13246 case DW_TAG_enumeration_type
:
13247 case DW_TAG_structure_type
:
13248 case DW_TAG_subrange_type
:
13249 case DW_TAG_typedef
:
13250 case DW_TAG_union_type
:
13257 /* Load all DIEs that are interesting for partial symbols into memory. */
13259 static struct partial_die_info
*
13260 load_partial_dies (const struct die_reader_specs
*reader
,
13261 gdb_byte
*info_ptr
, int building_psymtab
)
13263 struct dwarf2_cu
*cu
= reader
->cu
;
13264 struct objfile
*objfile
= cu
->objfile
;
13265 struct partial_die_info
*part_die
;
13266 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
13267 struct abbrev_info
*abbrev
;
13268 unsigned int bytes_read
;
13269 unsigned int load_all
= 0;
13270 int nesting_level
= 1;
13275 gdb_assert (cu
->per_cu
!= NULL
);
13276 if (cu
->per_cu
->load_all_dies
)
13280 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13284 &cu
->comp_unit_obstack
,
13285 hashtab_obstack_allocate
,
13286 dummy_obstack_deallocate
);
13288 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13289 sizeof (struct partial_die_info
));
13293 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
13295 /* A NULL abbrev means the end of a series of children. */
13296 if (abbrev
== NULL
)
13298 if (--nesting_level
== 0)
13300 /* PART_DIE was probably the last thing allocated on the
13301 comp_unit_obstack, so we could call obstack_free
13302 here. We don't do that because the waste is small,
13303 and will be cleaned up when we're done with this
13304 compilation unit. This way, we're also more robust
13305 against other users of the comp_unit_obstack. */
13308 info_ptr
+= bytes_read
;
13309 last_die
= parent_die
;
13310 parent_die
= parent_die
->die_parent
;
13314 /* Check for template arguments. We never save these; if
13315 they're seen, we just mark the parent, and go on our way. */
13316 if (parent_die
!= NULL
13317 && cu
->language
== language_cplus
13318 && (abbrev
->tag
== DW_TAG_template_type_param
13319 || abbrev
->tag
== DW_TAG_template_value_param
))
13321 parent_die
->has_template_arguments
= 1;
13325 /* We don't need a partial DIE for the template argument. */
13326 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13331 /* We only recurse into c++ subprograms looking for template arguments.
13332 Skip their other children. */
13334 && cu
->language
== language_cplus
13335 && parent_die
!= NULL
13336 && parent_die
->tag
== DW_TAG_subprogram
)
13338 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13342 /* Check whether this DIE is interesting enough to save. Normally
13343 we would not be interested in members here, but there may be
13344 later variables referencing them via DW_AT_specification (for
13345 static members). */
13347 && !is_type_tag_for_partial (abbrev
->tag
)
13348 && abbrev
->tag
!= DW_TAG_constant
13349 && abbrev
->tag
!= DW_TAG_enumerator
13350 && abbrev
->tag
!= DW_TAG_subprogram
13351 && abbrev
->tag
!= DW_TAG_lexical_block
13352 && abbrev
->tag
!= DW_TAG_variable
13353 && abbrev
->tag
!= DW_TAG_namespace
13354 && abbrev
->tag
!= DW_TAG_module
13355 && abbrev
->tag
!= DW_TAG_member
13356 && abbrev
->tag
!= DW_TAG_imported_unit
)
13358 /* Otherwise we skip to the next sibling, if any. */
13359 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
13363 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
13366 /* This two-pass algorithm for processing partial symbols has a
13367 high cost in cache pressure. Thus, handle some simple cases
13368 here which cover the majority of C partial symbols. DIEs
13369 which neither have specification tags in them, nor could have
13370 specification tags elsewhere pointing at them, can simply be
13371 processed and discarded.
13373 This segment is also optional; scan_partial_symbols and
13374 add_partial_symbol will handle these DIEs if we chain
13375 them in normally. When compilers which do not emit large
13376 quantities of duplicate debug information are more common,
13377 this code can probably be removed. */
13379 /* Any complete simple types at the top level (pretty much all
13380 of them, for a language without namespaces), can be processed
13382 if (parent_die
== NULL
13383 && part_die
->has_specification
== 0
13384 && part_die
->is_declaration
== 0
13385 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
13386 || part_die
->tag
== DW_TAG_base_type
13387 || part_die
->tag
== DW_TAG_subrange_type
))
13389 if (building_psymtab
&& part_die
->name
!= NULL
)
13390 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13391 VAR_DOMAIN
, LOC_TYPEDEF
,
13392 &objfile
->static_psymbols
,
13393 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13394 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13398 /* The exception for DW_TAG_typedef with has_children above is
13399 a workaround of GCC PR debug/47510. In the case of this complaint
13400 type_name_no_tag_or_error will error on such types later.
13402 GDB skipped children of DW_TAG_typedef by the shortcut above and then
13403 it could not find the child DIEs referenced later, this is checked
13404 above. In correct DWARF DW_TAG_typedef should have no children. */
13406 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
13407 complaint (&symfile_complaints
,
13408 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
13409 "- DIE at 0x%x [in module %s]"),
13410 part_die
->offset
.sect_off
, objfile
->name
);
13412 /* If we're at the second level, and we're an enumerator, and
13413 our parent has no specification (meaning possibly lives in a
13414 namespace elsewhere), then we can add the partial symbol now
13415 instead of queueing it. */
13416 if (part_die
->tag
== DW_TAG_enumerator
13417 && parent_die
!= NULL
13418 && parent_die
->die_parent
== NULL
13419 && parent_die
->tag
== DW_TAG_enumeration_type
13420 && parent_die
->has_specification
== 0)
13422 if (part_die
->name
== NULL
)
13423 complaint (&symfile_complaints
,
13424 _("malformed enumerator DIE ignored"));
13425 else if (building_psymtab
)
13426 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
13427 VAR_DOMAIN
, LOC_CONST
,
13428 (cu
->language
== language_cplus
13429 || cu
->language
== language_java
)
13430 ? &objfile
->global_psymbols
13431 : &objfile
->static_psymbols
,
13432 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
13434 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
13438 /* We'll save this DIE so link it in. */
13439 part_die
->die_parent
= parent_die
;
13440 part_die
->die_sibling
= NULL
;
13441 part_die
->die_child
= NULL
;
13443 if (last_die
&& last_die
== parent_die
)
13444 last_die
->die_child
= part_die
;
13446 last_die
->die_sibling
= part_die
;
13448 last_die
= part_die
;
13450 if (first_die
== NULL
)
13451 first_die
= part_die
;
13453 /* Maybe add the DIE to the hash table. Not all DIEs that we
13454 find interesting need to be in the hash table, because we
13455 also have the parent/sibling/child chains; only those that we
13456 might refer to by offset later during partial symbol reading.
13458 For now this means things that might have be the target of a
13459 DW_AT_specification, DW_AT_abstract_origin, or
13460 DW_AT_extension. DW_AT_extension will refer only to
13461 namespaces; DW_AT_abstract_origin refers to functions (and
13462 many things under the function DIE, but we do not recurse
13463 into function DIEs during partial symbol reading) and
13464 possibly variables as well; DW_AT_specification refers to
13465 declarations. Declarations ought to have the DW_AT_declaration
13466 flag. It happens that GCC forgets to put it in sometimes, but
13467 only for functions, not for types.
13469 Adding more things than necessary to the hash table is harmless
13470 except for the performance cost. Adding too few will result in
13471 wasted time in find_partial_die, when we reread the compilation
13472 unit with load_all_dies set. */
13475 || abbrev
->tag
== DW_TAG_constant
13476 || abbrev
->tag
== DW_TAG_subprogram
13477 || abbrev
->tag
== DW_TAG_variable
13478 || abbrev
->tag
== DW_TAG_namespace
13479 || part_die
->is_declaration
)
13483 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
13484 part_die
->offset
.sect_off
, INSERT
);
13488 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
13489 sizeof (struct partial_die_info
));
13491 /* For some DIEs we want to follow their children (if any). For C
13492 we have no reason to follow the children of structures; for other
13493 languages we have to, so that we can get at method physnames
13494 to infer fully qualified class names, for DW_AT_specification,
13495 and for C++ template arguments. For C++, we also look one level
13496 inside functions to find template arguments (if the name of the
13497 function does not already contain the template arguments).
13499 For Ada, we need to scan the children of subprograms and lexical
13500 blocks as well because Ada allows the definition of nested
13501 entities that could be interesting for the debugger, such as
13502 nested subprograms for instance. */
13503 if (last_die
->has_children
13505 || last_die
->tag
== DW_TAG_namespace
13506 || last_die
->tag
== DW_TAG_module
13507 || last_die
->tag
== DW_TAG_enumeration_type
13508 || (cu
->language
== language_cplus
13509 && last_die
->tag
== DW_TAG_subprogram
13510 && (last_die
->name
== NULL
13511 || strchr (last_die
->name
, '<') == NULL
))
13512 || (cu
->language
!= language_c
13513 && (last_die
->tag
== DW_TAG_class_type
13514 || last_die
->tag
== DW_TAG_interface_type
13515 || last_die
->tag
== DW_TAG_structure_type
13516 || last_die
->tag
== DW_TAG_union_type
))
13517 || (cu
->language
== language_ada
13518 && (last_die
->tag
== DW_TAG_subprogram
13519 || last_die
->tag
== DW_TAG_lexical_block
))))
13522 parent_die
= last_die
;
13526 /* Otherwise we skip to the next sibling, if any. */
13527 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
13529 /* Back to the top, do it again. */
13533 /* Read a minimal amount of information into the minimal die structure. */
13536 read_partial_die (const struct die_reader_specs
*reader
,
13537 struct partial_die_info
*part_die
,
13538 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
13539 gdb_byte
*info_ptr
)
13541 struct dwarf2_cu
*cu
= reader
->cu
;
13542 struct objfile
*objfile
= cu
->objfile
;
13543 gdb_byte
*buffer
= reader
->buffer
;
13545 struct attribute attr
;
13546 int has_low_pc_attr
= 0;
13547 int has_high_pc_attr
= 0;
13548 int high_pc_relative
= 0;
13550 memset (part_die
, 0, sizeof (struct partial_die_info
));
13552 part_die
->offset
.sect_off
= info_ptr
- buffer
;
13554 info_ptr
+= abbrev_len
;
13556 if (abbrev
== NULL
)
13559 part_die
->tag
= abbrev
->tag
;
13560 part_die
->has_children
= abbrev
->has_children
;
13562 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
13564 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
13566 /* Store the data if it is of an attribute we want to keep in a
13567 partial symbol table. */
13571 switch (part_die
->tag
)
13573 case DW_TAG_compile_unit
:
13574 case DW_TAG_partial_unit
:
13575 case DW_TAG_type_unit
:
13576 /* Compilation units have a DW_AT_name that is a filename, not
13577 a source language identifier. */
13578 case DW_TAG_enumeration_type
:
13579 case DW_TAG_enumerator
:
13580 /* These tags always have simple identifiers already; no need
13581 to canonicalize them. */
13582 part_die
->name
= DW_STRING (&attr
);
13586 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
13587 &objfile
->objfile_obstack
);
13591 case DW_AT_linkage_name
:
13592 case DW_AT_MIPS_linkage_name
:
13593 /* Note that both forms of linkage name might appear. We
13594 assume they will be the same, and we only store the last
13596 if (cu
->language
== language_ada
)
13597 part_die
->name
= DW_STRING (&attr
);
13598 part_die
->linkage_name
= DW_STRING (&attr
);
13601 has_low_pc_attr
= 1;
13602 part_die
->lowpc
= DW_ADDR (&attr
);
13604 case DW_AT_high_pc
:
13605 has_high_pc_attr
= 1;
13606 if (attr
.form
== DW_FORM_addr
13607 || attr
.form
== DW_FORM_GNU_addr_index
)
13608 part_die
->highpc
= DW_ADDR (&attr
);
13611 high_pc_relative
= 1;
13612 part_die
->highpc
= DW_UNSND (&attr
);
13615 case DW_AT_location
:
13616 /* Support the .debug_loc offsets. */
13617 if (attr_form_is_block (&attr
))
13619 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
13621 else if (attr_form_is_section_offset (&attr
))
13623 dwarf2_complex_location_expr_complaint ();
13627 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13628 "partial symbol information");
13631 case DW_AT_external
:
13632 part_die
->is_external
= DW_UNSND (&attr
);
13634 case DW_AT_declaration
:
13635 part_die
->is_declaration
= DW_UNSND (&attr
);
13638 part_die
->has_type
= 1;
13640 case DW_AT_abstract_origin
:
13641 case DW_AT_specification
:
13642 case DW_AT_extension
:
13643 part_die
->has_specification
= 1;
13644 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
13645 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13646 || cu
->per_cu
->is_dwz
);
13648 case DW_AT_sibling
:
13649 /* Ignore absolute siblings, they might point outside of
13650 the current compile unit. */
13651 if (attr
.form
== DW_FORM_ref_addr
)
13652 complaint (&symfile_complaints
,
13653 _("ignoring absolute DW_AT_sibling"));
13655 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
13657 case DW_AT_byte_size
:
13658 part_die
->has_byte_size
= 1;
13660 case DW_AT_calling_convention
:
13661 /* DWARF doesn't provide a way to identify a program's source-level
13662 entry point. DW_AT_calling_convention attributes are only meant
13663 to describe functions' calling conventions.
13665 However, because it's a necessary piece of information in
13666 Fortran, and because DW_CC_program is the only piece of debugging
13667 information whose definition refers to a 'main program' at all,
13668 several compilers have begun marking Fortran main programs with
13669 DW_CC_program --- even when those functions use the standard
13670 calling conventions.
13672 So until DWARF specifies a way to provide this information and
13673 compilers pick up the new representation, we'll support this
13675 if (DW_UNSND (&attr
) == DW_CC_program
13676 && cu
->language
== language_fortran
)
13678 set_main_name (part_die
->name
);
13680 /* As this DIE has a static linkage the name would be difficult
13681 to look up later. */
13682 language_of_main
= language_fortran
;
13686 if (DW_UNSND (&attr
) == DW_INL_inlined
13687 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
13688 part_die
->may_be_inlined
= 1;
13692 if (part_die
->tag
== DW_TAG_imported_unit
)
13694 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
13695 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
13696 || cu
->per_cu
->is_dwz
);
13705 if (high_pc_relative
)
13706 part_die
->highpc
+= part_die
->lowpc
;
13708 if (has_low_pc_attr
&& has_high_pc_attr
)
13710 /* When using the GNU linker, .gnu.linkonce. sections are used to
13711 eliminate duplicate copies of functions and vtables and such.
13712 The linker will arbitrarily choose one and discard the others.
13713 The AT_*_pc values for such functions refer to local labels in
13714 these sections. If the section from that file was discarded, the
13715 labels are not in the output, so the relocs get a value of 0.
13716 If this is a discarded function, mark the pc bounds as invalid,
13717 so that GDB will ignore it. */
13718 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13720 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13722 complaint (&symfile_complaints
,
13723 _("DW_AT_low_pc %s is zero "
13724 "for DIE at 0x%x [in module %s]"),
13725 paddress (gdbarch
, part_die
->lowpc
),
13726 part_die
->offset
.sect_off
, objfile
->name
);
13728 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
13729 else if (part_die
->lowpc
>= part_die
->highpc
)
13731 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13733 complaint (&symfile_complaints
,
13734 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
13735 "for DIE at 0x%x [in module %s]"),
13736 paddress (gdbarch
, part_die
->lowpc
),
13737 paddress (gdbarch
, part_die
->highpc
),
13738 part_die
->offset
.sect_off
, objfile
->name
);
13741 part_die
->has_pc_info
= 1;
13747 /* Find a cached partial DIE at OFFSET in CU. */
13749 static struct partial_die_info
*
13750 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
13752 struct partial_die_info
*lookup_die
= NULL
;
13753 struct partial_die_info part_die
;
13755 part_die
.offset
= offset
;
13756 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
13762 /* Find a partial DIE at OFFSET, which may or may not be in CU,
13763 except in the case of .debug_types DIEs which do not reference
13764 outside their CU (they do however referencing other types via
13765 DW_FORM_ref_sig8). */
13767 static struct partial_die_info
*
13768 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
13770 struct objfile
*objfile
= cu
->objfile
;
13771 struct dwarf2_per_cu_data
*per_cu
= NULL
;
13772 struct partial_die_info
*pd
= NULL
;
13774 if (offset_in_dwz
== cu
->per_cu
->is_dwz
13775 && offset_in_cu_p (&cu
->header
, offset
))
13777 pd
= find_partial_die_in_comp_unit (offset
, cu
);
13780 /* We missed recording what we needed.
13781 Load all dies and try again. */
13782 per_cu
= cu
->per_cu
;
13786 /* TUs don't reference other CUs/TUs (except via type signatures). */
13787 if (cu
->per_cu
->is_debug_types
)
13789 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
13790 " external reference to offset 0x%lx [in module %s].\n"),
13791 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
13792 bfd_get_filename (objfile
->obfd
));
13794 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
13797 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
13798 load_partial_comp_unit (per_cu
);
13800 per_cu
->cu
->last_used
= 0;
13801 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13804 /* If we didn't find it, and not all dies have been loaded,
13805 load them all and try again. */
13807 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
13809 per_cu
->load_all_dies
= 1;
13811 /* This is nasty. When we reread the DIEs, somewhere up the call chain
13812 THIS_CU->cu may already be in use. So we can't just free it and
13813 replace its DIEs with the ones we read in. Instead, we leave those
13814 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
13815 and clobber THIS_CU->cu->partial_dies with the hash table for the new
13817 load_partial_comp_unit (per_cu
);
13819 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
13823 internal_error (__FILE__
, __LINE__
,
13824 _("could not find partial DIE 0x%x "
13825 "in cache [from module %s]\n"),
13826 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
13830 /* See if we can figure out if the class lives in a namespace. We do
13831 this by looking for a member function; its demangled name will
13832 contain namespace info, if there is any. */
13835 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
13836 struct dwarf2_cu
*cu
)
13838 /* NOTE: carlton/2003-10-07: Getting the info this way changes
13839 what template types look like, because the demangler
13840 frequently doesn't give the same name as the debug info. We
13841 could fix this by only using the demangled name to get the
13842 prefix (but see comment in read_structure_type). */
13844 struct partial_die_info
*real_pdi
;
13845 struct partial_die_info
*child_pdi
;
13847 /* If this DIE (this DIE's specification, if any) has a parent, then
13848 we should not do this. We'll prepend the parent's fully qualified
13849 name when we create the partial symbol. */
13851 real_pdi
= struct_pdi
;
13852 while (real_pdi
->has_specification
)
13853 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
13854 real_pdi
->spec_is_dwz
, cu
);
13856 if (real_pdi
->die_parent
!= NULL
)
13859 for (child_pdi
= struct_pdi
->die_child
;
13861 child_pdi
= child_pdi
->die_sibling
)
13863 if (child_pdi
->tag
== DW_TAG_subprogram
13864 && child_pdi
->linkage_name
!= NULL
)
13866 char *actual_class_name
13867 = language_class_name_from_physname (cu
->language_defn
,
13868 child_pdi
->linkage_name
);
13869 if (actual_class_name
!= NULL
)
13872 = obsavestring (actual_class_name
,
13873 strlen (actual_class_name
),
13874 &cu
->objfile
->objfile_obstack
);
13875 xfree (actual_class_name
);
13882 /* Adjust PART_DIE before generating a symbol for it. This function
13883 may set the is_external flag or change the DIE's name. */
13886 fixup_partial_die (struct partial_die_info
*part_die
,
13887 struct dwarf2_cu
*cu
)
13889 /* Once we've fixed up a die, there's no point in doing so again.
13890 This also avoids a memory leak if we were to call
13891 guess_partial_die_structure_name multiple times. */
13892 if (part_die
->fixup_called
)
13895 /* If we found a reference attribute and the DIE has no name, try
13896 to find a name in the referred to DIE. */
13898 if (part_die
->name
== NULL
&& part_die
->has_specification
)
13900 struct partial_die_info
*spec_die
;
13902 spec_die
= find_partial_die (part_die
->spec_offset
,
13903 part_die
->spec_is_dwz
, cu
);
13905 fixup_partial_die (spec_die
, cu
);
13907 if (spec_die
->name
)
13909 part_die
->name
= spec_die
->name
;
13911 /* Copy DW_AT_external attribute if it is set. */
13912 if (spec_die
->is_external
)
13913 part_die
->is_external
= spec_die
->is_external
;
13917 /* Set default names for some unnamed DIEs. */
13919 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
13920 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
13922 /* If there is no parent die to provide a namespace, and there are
13923 children, see if we can determine the namespace from their linkage
13925 if (cu
->language
== language_cplus
13926 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
13927 && part_die
->die_parent
== NULL
13928 && part_die
->has_children
13929 && (part_die
->tag
== DW_TAG_class_type
13930 || part_die
->tag
== DW_TAG_structure_type
13931 || part_die
->tag
== DW_TAG_union_type
))
13932 guess_partial_die_structure_name (part_die
, cu
);
13934 /* GCC might emit a nameless struct or union that has a linkage
13935 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13936 if (part_die
->name
== NULL
13937 && (part_die
->tag
== DW_TAG_class_type
13938 || part_die
->tag
== DW_TAG_interface_type
13939 || part_die
->tag
== DW_TAG_structure_type
13940 || part_die
->tag
== DW_TAG_union_type
)
13941 && part_die
->linkage_name
!= NULL
)
13945 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13950 /* Strip any leading namespaces/classes, keep only the base name.
13951 DW_AT_name for named DIEs does not contain the prefixes. */
13952 base
= strrchr (demangled
, ':');
13953 if (base
&& base
> demangled
&& base
[-1] == ':')
13958 part_die
->name
= obsavestring (base
, strlen (base
),
13959 &cu
->objfile
->objfile_obstack
);
13964 part_die
->fixup_called
= 1;
13967 /* Read an attribute value described by an attribute form. */
13970 read_attribute_value (const struct die_reader_specs
*reader
,
13971 struct attribute
*attr
, unsigned form
,
13972 gdb_byte
*info_ptr
)
13974 struct dwarf2_cu
*cu
= reader
->cu
;
13975 bfd
*abfd
= reader
->abfd
;
13976 struct comp_unit_head
*cu_header
= &cu
->header
;
13977 unsigned int bytes_read
;
13978 struct dwarf_block
*blk
;
13983 case DW_FORM_ref_addr
:
13984 if (cu
->header
.version
== 2)
13985 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13987 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
13988 &cu
->header
, &bytes_read
);
13989 info_ptr
+= bytes_read
;
13991 case DW_FORM_GNU_ref_alt
:
13992 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13993 info_ptr
+= bytes_read
;
13996 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13997 info_ptr
+= bytes_read
;
13999 case DW_FORM_block2
:
14000 blk
= dwarf_alloc_block (cu
);
14001 blk
->size
= read_2_bytes (abfd
, info_ptr
);
14003 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14004 info_ptr
+= blk
->size
;
14005 DW_BLOCK (attr
) = blk
;
14007 case DW_FORM_block4
:
14008 blk
= dwarf_alloc_block (cu
);
14009 blk
->size
= read_4_bytes (abfd
, info_ptr
);
14011 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14012 info_ptr
+= blk
->size
;
14013 DW_BLOCK (attr
) = blk
;
14015 case DW_FORM_data2
:
14016 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
14019 case DW_FORM_data4
:
14020 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
14023 case DW_FORM_data8
:
14024 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
14027 case DW_FORM_sec_offset
:
14028 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
14029 info_ptr
+= bytes_read
;
14031 case DW_FORM_string
:
14032 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
14033 DW_STRING_IS_CANONICAL (attr
) = 0;
14034 info_ptr
+= bytes_read
;
14037 if (!cu
->per_cu
->is_dwz
)
14039 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
14041 DW_STRING_IS_CANONICAL (attr
) = 0;
14042 info_ptr
+= bytes_read
;
14046 case DW_FORM_GNU_strp_alt
:
14048 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14049 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
14052 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
14053 DW_STRING_IS_CANONICAL (attr
) = 0;
14054 info_ptr
+= bytes_read
;
14057 case DW_FORM_exprloc
:
14058 case DW_FORM_block
:
14059 blk
= dwarf_alloc_block (cu
);
14060 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14061 info_ptr
+= bytes_read
;
14062 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14063 info_ptr
+= blk
->size
;
14064 DW_BLOCK (attr
) = blk
;
14066 case DW_FORM_block1
:
14067 blk
= dwarf_alloc_block (cu
);
14068 blk
->size
= read_1_byte (abfd
, info_ptr
);
14070 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
14071 info_ptr
+= blk
->size
;
14072 DW_BLOCK (attr
) = blk
;
14074 case DW_FORM_data1
:
14075 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14079 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
14082 case DW_FORM_flag_present
:
14083 DW_UNSND (attr
) = 1;
14085 case DW_FORM_sdata
:
14086 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
14087 info_ptr
+= bytes_read
;
14089 case DW_FORM_udata
:
14090 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14091 info_ptr
+= bytes_read
;
14094 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14095 + read_1_byte (abfd
, info_ptr
));
14099 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14100 + read_2_bytes (abfd
, info_ptr
));
14104 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14105 + read_4_bytes (abfd
, info_ptr
));
14109 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14110 + read_8_bytes (abfd
, info_ptr
));
14113 case DW_FORM_ref_sig8
:
14114 /* Convert the signature to something we can record in DW_UNSND
14116 NOTE: This is NULL if the type wasn't found. */
14117 DW_SIGNATURED_TYPE (attr
) =
14118 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
14121 case DW_FORM_ref_udata
:
14122 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
14123 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
14124 info_ptr
+= bytes_read
;
14126 case DW_FORM_indirect
:
14127 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14128 info_ptr
+= bytes_read
;
14129 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
14131 case DW_FORM_GNU_addr_index
:
14132 if (reader
->dwo_file
== NULL
)
14134 /* For now flag a hard error.
14135 Later we can turn this into a complaint. */
14136 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14137 dwarf_form_name (form
),
14138 bfd_get_filename (abfd
));
14140 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
14141 info_ptr
+= bytes_read
;
14143 case DW_FORM_GNU_str_index
:
14144 if (reader
->dwo_file
== NULL
)
14146 /* For now flag a hard error.
14147 Later we can turn this into a complaint if warranted. */
14148 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
14149 dwarf_form_name (form
),
14150 bfd_get_filename (abfd
));
14153 ULONGEST str_index
=
14154 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14156 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
14157 DW_STRING_IS_CANONICAL (attr
) = 0;
14158 info_ptr
+= bytes_read
;
14162 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
14163 dwarf_form_name (form
),
14164 bfd_get_filename (abfd
));
14168 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
14169 attr
->form
= DW_FORM_GNU_ref_alt
;
14171 /* We have seen instances where the compiler tried to emit a byte
14172 size attribute of -1 which ended up being encoded as an unsigned
14173 0xffffffff. Although 0xffffffff is technically a valid size value,
14174 an object of this size seems pretty unlikely so we can relatively
14175 safely treat these cases as if the size attribute was invalid and
14176 treat them as zero by default. */
14177 if (attr
->name
== DW_AT_byte_size
14178 && form
== DW_FORM_data4
14179 && DW_UNSND (attr
) >= 0xffffffff)
14182 (&symfile_complaints
,
14183 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
14184 hex_string (DW_UNSND (attr
)));
14185 DW_UNSND (attr
) = 0;
14191 /* Read an attribute described by an abbreviated attribute. */
14194 read_attribute (const struct die_reader_specs
*reader
,
14195 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
14196 gdb_byte
*info_ptr
)
14198 attr
->name
= abbrev
->name
;
14199 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
14202 /* Read dwarf information from a buffer. */
14204 static unsigned int
14205 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
14207 return bfd_get_8 (abfd
, buf
);
14211 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
14213 return bfd_get_signed_8 (abfd
, buf
);
14216 static unsigned int
14217 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14219 return bfd_get_16 (abfd
, buf
);
14223 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14225 return bfd_get_signed_16 (abfd
, buf
);
14228 static unsigned int
14229 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14231 return bfd_get_32 (abfd
, buf
);
14235 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14237 return bfd_get_signed_32 (abfd
, buf
);
14241 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
14243 return bfd_get_64 (abfd
, buf
);
14247 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
14248 unsigned int *bytes_read
)
14250 struct comp_unit_head
*cu_header
= &cu
->header
;
14251 CORE_ADDR retval
= 0;
14253 if (cu_header
->signed_addr_p
)
14255 switch (cu_header
->addr_size
)
14258 retval
= bfd_get_signed_16 (abfd
, buf
);
14261 retval
= bfd_get_signed_32 (abfd
, buf
);
14264 retval
= bfd_get_signed_64 (abfd
, buf
);
14267 internal_error (__FILE__
, __LINE__
,
14268 _("read_address: bad switch, signed [in module %s]"),
14269 bfd_get_filename (abfd
));
14274 switch (cu_header
->addr_size
)
14277 retval
= bfd_get_16 (abfd
, buf
);
14280 retval
= bfd_get_32 (abfd
, buf
);
14283 retval
= bfd_get_64 (abfd
, buf
);
14286 internal_error (__FILE__
, __LINE__
,
14287 _("read_address: bad switch, "
14288 "unsigned [in module %s]"),
14289 bfd_get_filename (abfd
));
14293 *bytes_read
= cu_header
->addr_size
;
14297 /* Read the initial length from a section. The (draft) DWARF 3
14298 specification allows the initial length to take up either 4 bytes
14299 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
14300 bytes describe the length and all offsets will be 8 bytes in length
14303 An older, non-standard 64-bit format is also handled by this
14304 function. The older format in question stores the initial length
14305 as an 8-byte quantity without an escape value. Lengths greater
14306 than 2^32 aren't very common which means that the initial 4 bytes
14307 is almost always zero. Since a length value of zero doesn't make
14308 sense for the 32-bit format, this initial zero can be considered to
14309 be an escape value which indicates the presence of the older 64-bit
14310 format. As written, the code can't detect (old format) lengths
14311 greater than 4GB. If it becomes necessary to handle lengths
14312 somewhat larger than 4GB, we could allow other small values (such
14313 as the non-sensical values of 1, 2, and 3) to also be used as
14314 escape values indicating the presence of the old format.
14316 The value returned via bytes_read should be used to increment the
14317 relevant pointer after calling read_initial_length().
14319 [ Note: read_initial_length() and read_offset() are based on the
14320 document entitled "DWARF Debugging Information Format", revision
14321 3, draft 8, dated November 19, 2001. This document was obtained
14324 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
14326 This document is only a draft and is subject to change. (So beware.)
14328 Details regarding the older, non-standard 64-bit format were
14329 determined empirically by examining 64-bit ELF files produced by
14330 the SGI toolchain on an IRIX 6.5 machine.
14332 - Kevin, July 16, 2002
14336 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
14338 LONGEST length
= bfd_get_32 (abfd
, buf
);
14340 if (length
== 0xffffffff)
14342 length
= bfd_get_64 (abfd
, buf
+ 4);
14345 else if (length
== 0)
14347 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
14348 length
= bfd_get_64 (abfd
, buf
);
14359 /* Cover function for read_initial_length.
14360 Returns the length of the object at BUF, and stores the size of the
14361 initial length in *BYTES_READ and stores the size that offsets will be in
14363 If the initial length size is not equivalent to that specified in
14364 CU_HEADER then issue a complaint.
14365 This is useful when reading non-comp-unit headers. */
14368 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
14369 const struct comp_unit_head
*cu_header
,
14370 unsigned int *bytes_read
,
14371 unsigned int *offset_size
)
14373 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
14375 gdb_assert (cu_header
->initial_length_size
== 4
14376 || cu_header
->initial_length_size
== 8
14377 || cu_header
->initial_length_size
== 12);
14379 if (cu_header
->initial_length_size
!= *bytes_read
)
14380 complaint (&symfile_complaints
,
14381 _("intermixed 32-bit and 64-bit DWARF sections"));
14383 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
14387 /* Read an offset from the data stream. The size of the offset is
14388 given by cu_header->offset_size. */
14391 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
14392 unsigned int *bytes_read
)
14394 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
14396 *bytes_read
= cu_header
->offset_size
;
14400 /* Read an offset from the data stream. */
14403 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
14405 LONGEST retval
= 0;
14407 switch (offset_size
)
14410 retval
= bfd_get_32 (abfd
, buf
);
14413 retval
= bfd_get_64 (abfd
, buf
);
14416 internal_error (__FILE__
, __LINE__
,
14417 _("read_offset_1: bad switch [in module %s]"),
14418 bfd_get_filename (abfd
));
14425 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
14427 /* If the size of a host char is 8 bits, we can return a pointer
14428 to the buffer, otherwise we have to copy the data to a buffer
14429 allocated on the temporary obstack. */
14430 gdb_assert (HOST_CHAR_BIT
== 8);
14435 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14437 /* If the size of a host char is 8 bits, we can return a pointer
14438 to the string, otherwise we have to copy the string to a buffer
14439 allocated on the temporary obstack. */
14440 gdb_assert (HOST_CHAR_BIT
== 8);
14443 *bytes_read_ptr
= 1;
14446 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
14447 return (char *) buf
;
14451 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
14453 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
14454 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
14455 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
14456 bfd_get_filename (abfd
));
14457 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
14458 error (_("DW_FORM_strp pointing outside of "
14459 ".debug_str section [in module %s]"),
14460 bfd_get_filename (abfd
));
14461 gdb_assert (HOST_CHAR_BIT
== 8);
14462 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
14464 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
14467 /* Read a string at offset STR_OFFSET in the .debug_str section from
14468 the .dwz file DWZ. Throw an error if the offset is too large. If
14469 the string consists of a single NUL byte, return NULL; otherwise
14470 return a pointer to the string. */
14473 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
14475 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
14477 if (dwz
->str
.buffer
== NULL
)
14478 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
14479 "section [in module %s]"),
14480 bfd_get_filename (dwz
->dwz_bfd
));
14481 if (str_offset
>= dwz
->str
.size
)
14482 error (_("DW_FORM_GNU_strp_alt pointing outside of "
14483 ".debug_str section [in module %s]"),
14484 bfd_get_filename (dwz
->dwz_bfd
));
14485 gdb_assert (HOST_CHAR_BIT
== 8);
14486 if (dwz
->str
.buffer
[str_offset
] == '\0')
14488 return (char *) (dwz
->str
.buffer
+ str_offset
);
14492 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
14493 const struct comp_unit_head
*cu_header
,
14494 unsigned int *bytes_read_ptr
)
14496 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
14498 return read_indirect_string_at_offset (abfd
, str_offset
);
14502 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14505 unsigned int num_read
;
14507 unsigned char byte
;
14515 byte
= bfd_get_8 (abfd
, buf
);
14518 result
|= ((ULONGEST
) (byte
& 127) << shift
);
14519 if ((byte
& 128) == 0)
14525 *bytes_read_ptr
= num_read
;
14530 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
14533 int i
, shift
, num_read
;
14534 unsigned char byte
;
14542 byte
= bfd_get_8 (abfd
, buf
);
14545 result
|= ((LONGEST
) (byte
& 127) << shift
);
14547 if ((byte
& 128) == 0)
14552 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
14553 result
|= -(((LONGEST
) 1) << shift
);
14554 *bytes_read_ptr
= num_read
;
14558 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
14559 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
14560 ADDR_SIZE is the size of addresses from the CU header. */
14563 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
14565 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14566 bfd
*abfd
= objfile
->obfd
;
14567 const gdb_byte
*info_ptr
;
14569 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
14570 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
14571 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
14573 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
14574 error (_("DW_FORM_addr_index pointing outside of "
14575 ".debug_addr section [in module %s]"),
14577 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
14578 + addr_base
+ addr_index
* addr_size
);
14579 if (addr_size
== 4)
14580 return bfd_get_32 (abfd
, info_ptr
);
14582 return bfd_get_64 (abfd
, info_ptr
);
14585 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
14588 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
14590 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
14593 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
14596 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
14597 unsigned int *bytes_read
)
14599 bfd
*abfd
= cu
->objfile
->obfd
;
14600 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
14602 return read_addr_index (cu
, addr_index
);
14605 /* Data structure to pass results from dwarf2_read_addr_index_reader
14606 back to dwarf2_read_addr_index. */
14608 struct dwarf2_read_addr_index_data
14610 ULONGEST addr_base
;
14614 /* die_reader_func for dwarf2_read_addr_index. */
14617 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
14618 gdb_byte
*info_ptr
,
14619 struct die_info
*comp_unit_die
,
14623 struct dwarf2_cu
*cu
= reader
->cu
;
14624 struct dwarf2_read_addr_index_data
*aidata
=
14625 (struct dwarf2_read_addr_index_data
*) data
;
14627 aidata
->addr_base
= cu
->addr_base
;
14628 aidata
->addr_size
= cu
->header
.addr_size
;
14631 /* Given an index in .debug_addr, fetch the value.
14632 NOTE: This can be called during dwarf expression evaluation,
14633 long after the debug information has been read, and thus per_cu->cu
14634 may no longer exist. */
14637 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
14638 unsigned int addr_index
)
14640 struct objfile
*objfile
= per_cu
->objfile
;
14641 struct dwarf2_cu
*cu
= per_cu
->cu
;
14642 ULONGEST addr_base
;
14645 /* This is intended to be called from outside this file. */
14646 dw2_setup (objfile
);
14648 /* We need addr_base and addr_size.
14649 If we don't have PER_CU->cu, we have to get it.
14650 Nasty, but the alternative is storing the needed info in PER_CU,
14651 which at this point doesn't seem justified: it's not clear how frequently
14652 it would get used and it would increase the size of every PER_CU.
14653 Entry points like dwarf2_per_cu_addr_size do a similar thing
14654 so we're not in uncharted territory here.
14655 Alas we need to be a bit more complicated as addr_base is contained
14658 We don't need to read the entire CU(/TU).
14659 We just need the header and top level die.
14661 IWBN to use the aging mechanism to let us lazily later discard the CU.
14662 For now we skip this optimization. */
14666 addr_base
= cu
->addr_base
;
14667 addr_size
= cu
->header
.addr_size
;
14671 struct dwarf2_read_addr_index_data aidata
;
14673 /* Note: We can't use init_cutu_and_read_dies_simple here,
14674 we need addr_base. */
14675 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
14676 dwarf2_read_addr_index_reader
, &aidata
);
14677 addr_base
= aidata
.addr_base
;
14678 addr_size
= aidata
.addr_size
;
14681 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
14684 /* Given a DW_AT_str_index, fetch the string. */
14687 read_str_index (const struct die_reader_specs
*reader
,
14688 struct dwarf2_cu
*cu
, ULONGEST str_index
)
14690 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14691 const char *dwo_name
= objfile
->name
;
14692 bfd
*abfd
= objfile
->obfd
;
14693 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
14694 gdb_byte
*info_ptr
;
14695 ULONGEST str_offset
;
14697 dwarf2_read_section (objfile
, §ions
->str
);
14698 dwarf2_read_section (objfile
, §ions
->str_offsets
);
14699 if (sections
->str
.buffer
== NULL
)
14700 error (_("DW_FORM_str_index used without .debug_str.dwo section"
14701 " in CU at offset 0x%lx [in module %s]"),
14702 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14703 if (sections
->str_offsets
.buffer
== NULL
)
14704 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
14705 " in CU at offset 0x%lx [in module %s]"),
14706 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14707 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
14708 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
14709 " section in CU at offset 0x%lx [in module %s]"),
14710 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14711 info_ptr
= (sections
->str_offsets
.buffer
14712 + str_index
* cu
->header
.offset_size
);
14713 if (cu
->header
.offset_size
== 4)
14714 str_offset
= bfd_get_32 (abfd
, info_ptr
);
14716 str_offset
= bfd_get_64 (abfd
, info_ptr
);
14717 if (str_offset
>= sections
->str
.size
)
14718 error (_("Offset from DW_FORM_str_index pointing outside of"
14719 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
14720 (long) cu
->header
.offset
.sect_off
, dwo_name
);
14721 return (char *) (sections
->str
.buffer
+ str_offset
);
14724 /* Return the length of an LEB128 number in BUF. */
14727 leb128_size (const gdb_byte
*buf
)
14729 const gdb_byte
*begin
= buf
;
14735 if ((byte
& 128) == 0)
14736 return buf
- begin
;
14741 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
14748 cu
->language
= language_c
;
14750 case DW_LANG_C_plus_plus
:
14751 cu
->language
= language_cplus
;
14754 cu
->language
= language_d
;
14756 case DW_LANG_Fortran77
:
14757 case DW_LANG_Fortran90
:
14758 case DW_LANG_Fortran95
:
14759 cu
->language
= language_fortran
;
14762 cu
->language
= language_go
;
14764 case DW_LANG_Mips_Assembler
:
14765 cu
->language
= language_asm
;
14768 cu
->language
= language_java
;
14770 case DW_LANG_Ada83
:
14771 case DW_LANG_Ada95
:
14772 cu
->language
= language_ada
;
14774 case DW_LANG_Modula2
:
14775 cu
->language
= language_m2
;
14777 case DW_LANG_Pascal83
:
14778 cu
->language
= language_pascal
;
14781 cu
->language
= language_objc
;
14783 case DW_LANG_Cobol74
:
14784 case DW_LANG_Cobol85
:
14786 cu
->language
= language_minimal
;
14789 cu
->language_defn
= language_def (cu
->language
);
14792 /* Return the named attribute or NULL if not there. */
14794 static struct attribute
*
14795 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
14800 struct attribute
*spec
= NULL
;
14802 for (i
= 0; i
< die
->num_attrs
; ++i
)
14804 if (die
->attrs
[i
].name
== name
)
14805 return &die
->attrs
[i
];
14806 if (die
->attrs
[i
].name
== DW_AT_specification
14807 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
14808 spec
= &die
->attrs
[i
];
14814 die
= follow_die_ref (die
, spec
, &cu
);
14820 /* Return the named attribute or NULL if not there,
14821 but do not follow DW_AT_specification, etc.
14822 This is for use in contexts where we're reading .debug_types dies.
14823 Following DW_AT_specification, DW_AT_abstract_origin will take us
14824 back up the chain, and we want to go down. */
14826 static struct attribute
*
14827 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
14831 for (i
= 0; i
< die
->num_attrs
; ++i
)
14832 if (die
->attrs
[i
].name
== name
)
14833 return &die
->attrs
[i
];
14838 /* Return non-zero iff the attribute NAME is defined for the given DIE,
14839 and holds a non-zero value. This function should only be used for
14840 DW_FORM_flag or DW_FORM_flag_present attributes. */
14843 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
14845 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
14847 return (attr
&& DW_UNSND (attr
));
14851 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
14853 /* A DIE is a declaration if it has a DW_AT_declaration attribute
14854 which value is non-zero. However, we have to be careful with
14855 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
14856 (via dwarf2_flag_true_p) follows this attribute. So we may
14857 end up accidently finding a declaration attribute that belongs
14858 to a different DIE referenced by the specification attribute,
14859 even though the given DIE does not have a declaration attribute. */
14860 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
14861 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
14864 /* Return the die giving the specification for DIE, if there is
14865 one. *SPEC_CU is the CU containing DIE on input, and the CU
14866 containing the return value on output. If there is no
14867 specification, but there is an abstract origin, that is
14870 static struct die_info
*
14871 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
14873 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
14876 if (spec_attr
== NULL
)
14877 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
14879 if (spec_attr
== NULL
)
14882 return follow_die_ref (die
, spec_attr
, spec_cu
);
14885 /* Free the line_header structure *LH, and any arrays and strings it
14887 NOTE: This is also used as a "cleanup" function. */
14890 free_line_header (struct line_header
*lh
)
14892 if (lh
->standard_opcode_lengths
)
14893 xfree (lh
->standard_opcode_lengths
);
14895 /* Remember that all the lh->file_names[i].name pointers are
14896 pointers into debug_line_buffer, and don't need to be freed. */
14897 if (lh
->file_names
)
14898 xfree (lh
->file_names
);
14900 /* Similarly for the include directory names. */
14901 if (lh
->include_dirs
)
14902 xfree (lh
->include_dirs
);
14907 /* Add an entry to LH's include directory table. */
14910 add_include_dir (struct line_header
*lh
, char *include_dir
)
14912 /* Grow the array if necessary. */
14913 if (lh
->include_dirs_size
== 0)
14915 lh
->include_dirs_size
= 1; /* for testing */
14916 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
14917 * sizeof (*lh
->include_dirs
));
14919 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
14921 lh
->include_dirs_size
*= 2;
14922 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
14923 (lh
->include_dirs_size
14924 * sizeof (*lh
->include_dirs
)));
14927 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
14930 /* Add an entry to LH's file name table. */
14933 add_file_name (struct line_header
*lh
,
14935 unsigned int dir_index
,
14936 unsigned int mod_time
,
14937 unsigned int length
)
14939 struct file_entry
*fe
;
14941 /* Grow the array if necessary. */
14942 if (lh
->file_names_size
== 0)
14944 lh
->file_names_size
= 1; /* for testing */
14945 lh
->file_names
= xmalloc (lh
->file_names_size
14946 * sizeof (*lh
->file_names
));
14948 else if (lh
->num_file_names
>= lh
->file_names_size
)
14950 lh
->file_names_size
*= 2;
14951 lh
->file_names
= xrealloc (lh
->file_names
,
14952 (lh
->file_names_size
14953 * sizeof (*lh
->file_names
)));
14956 fe
= &lh
->file_names
[lh
->num_file_names
++];
14958 fe
->dir_index
= dir_index
;
14959 fe
->mod_time
= mod_time
;
14960 fe
->length
= length
;
14961 fe
->included_p
= 0;
14965 /* A convenience function to find the proper .debug_line section for a
14968 static struct dwarf2_section_info
*
14969 get_debug_line_section (struct dwarf2_cu
*cu
)
14971 struct dwarf2_section_info
*section
;
14973 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14975 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14976 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14977 else if (cu
->per_cu
->is_dwz
)
14979 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14981 section
= &dwz
->line
;
14984 section
= &dwarf2_per_objfile
->line
;
14989 /* Read the statement program header starting at OFFSET in
14990 .debug_line, or .debug_line.dwo. Return a pointer
14991 to a struct line_header, allocated using xmalloc.
14993 NOTE: the strings in the include directory and file name tables of
14994 the returned object point into the dwarf line section buffer,
14995 and must not be freed. */
14997 static struct line_header
*
14998 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
15000 struct cleanup
*back_to
;
15001 struct line_header
*lh
;
15002 gdb_byte
*line_ptr
;
15003 unsigned int bytes_read
, offset_size
;
15005 char *cur_dir
, *cur_file
;
15006 struct dwarf2_section_info
*section
;
15009 section
= get_debug_line_section (cu
);
15010 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
15011 if (section
->buffer
== NULL
)
15013 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
15014 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
15016 complaint (&symfile_complaints
, _("missing .debug_line section"));
15020 /* We can't do this until we know the section is non-empty.
15021 Only then do we know we have such a section. */
15022 abfd
= section
->asection
->owner
;
15024 /* Make sure that at least there's room for the total_length field.
15025 That could be 12 bytes long, but we're just going to fudge that. */
15026 if (offset
+ 4 >= section
->size
)
15028 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15032 lh
= xmalloc (sizeof (*lh
));
15033 memset (lh
, 0, sizeof (*lh
));
15034 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
15037 line_ptr
= section
->buffer
+ offset
;
15039 /* Read in the header. */
15041 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
15042 &bytes_read
, &offset_size
);
15043 line_ptr
+= bytes_read
;
15044 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
15046 dwarf2_statement_list_fits_in_line_number_section_complaint ();
15049 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
15050 lh
->version
= read_2_bytes (abfd
, line_ptr
);
15052 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
15053 line_ptr
+= offset_size
;
15054 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
15056 if (lh
->version
>= 4)
15058 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
15062 lh
->maximum_ops_per_instruction
= 1;
15064 if (lh
->maximum_ops_per_instruction
== 0)
15066 lh
->maximum_ops_per_instruction
= 1;
15067 complaint (&symfile_complaints
,
15068 _("invalid maximum_ops_per_instruction "
15069 "in `.debug_line' section"));
15072 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
15074 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
15076 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
15078 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
15080 lh
->standard_opcode_lengths
15081 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
15083 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
15084 for (i
= 1; i
< lh
->opcode_base
; ++i
)
15086 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
15090 /* Read directory table. */
15091 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15093 line_ptr
+= bytes_read
;
15094 add_include_dir (lh
, cur_dir
);
15096 line_ptr
+= bytes_read
;
15098 /* Read file name table. */
15099 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
15101 unsigned int dir_index
, mod_time
, length
;
15103 line_ptr
+= bytes_read
;
15104 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15105 line_ptr
+= bytes_read
;
15106 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15107 line_ptr
+= bytes_read
;
15108 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15109 line_ptr
+= bytes_read
;
15111 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15113 line_ptr
+= bytes_read
;
15114 lh
->statement_program_start
= line_ptr
;
15116 if (line_ptr
> (section
->buffer
+ section
->size
))
15117 complaint (&symfile_complaints
,
15118 _("line number info header doesn't "
15119 "fit in `.debug_line' section"));
15121 discard_cleanups (back_to
);
15125 /* Subroutine of dwarf_decode_lines to simplify it.
15126 Return the file name of the psymtab for included file FILE_INDEX
15127 in line header LH of PST.
15128 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15129 If space for the result is malloc'd, it will be freed by a cleanup.
15130 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
15132 The function creates dangling cleanup registration. */
15135 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
15136 const struct partial_symtab
*pst
,
15137 const char *comp_dir
)
15139 const struct file_entry fe
= lh
->file_names
[file_index
];
15140 char *include_name
= fe
.name
;
15141 char *include_name_to_compare
= include_name
;
15142 char *dir_name
= NULL
;
15143 const char *pst_filename
;
15144 char *copied_name
= NULL
;
15148 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
15150 if (!IS_ABSOLUTE_PATH (include_name
)
15151 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
15153 /* Avoid creating a duplicate psymtab for PST.
15154 We do this by comparing INCLUDE_NAME and PST_FILENAME.
15155 Before we do the comparison, however, we need to account
15156 for DIR_NAME and COMP_DIR.
15157 First prepend dir_name (if non-NULL). If we still don't
15158 have an absolute path prepend comp_dir (if non-NULL).
15159 However, the directory we record in the include-file's
15160 psymtab does not contain COMP_DIR (to match the
15161 corresponding symtab(s)).
15166 bash$ gcc -g ./hello.c
15167 include_name = "hello.c"
15169 DW_AT_comp_dir = comp_dir = "/tmp"
15170 DW_AT_name = "./hello.c" */
15172 if (dir_name
!= NULL
)
15174 include_name
= concat (dir_name
, SLASH_STRING
,
15175 include_name
, (char *)NULL
);
15176 include_name_to_compare
= include_name
;
15177 make_cleanup (xfree
, include_name
);
15179 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
15181 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
15182 include_name
, (char *)NULL
);
15186 pst_filename
= pst
->filename
;
15187 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
15189 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
15190 pst_filename
, (char *)NULL
);
15191 pst_filename
= copied_name
;
15194 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
15196 if (include_name_to_compare
!= include_name
)
15197 xfree (include_name_to_compare
);
15198 if (copied_name
!= NULL
)
15199 xfree (copied_name
);
15203 return include_name
;
15206 /* Ignore this record_line request. */
15209 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15214 /* Subroutine of dwarf_decode_lines to simplify it.
15215 Process the line number information in LH. */
15218 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
15219 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
15221 gdb_byte
*line_ptr
, *extended_end
;
15222 gdb_byte
*line_end
;
15223 unsigned int bytes_read
, extended_len
;
15224 unsigned char op_code
, extended_op
, adj_opcode
;
15225 CORE_ADDR baseaddr
;
15226 struct objfile
*objfile
= cu
->objfile
;
15227 bfd
*abfd
= objfile
->obfd
;
15228 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15229 const int decode_for_pst_p
= (pst
!= NULL
);
15230 struct subfile
*last_subfile
= NULL
;
15231 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
15234 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15236 line_ptr
= lh
->statement_program_start
;
15237 line_end
= lh
->statement_program_end
;
15239 /* Read the statement sequences until there's nothing left. */
15240 while (line_ptr
< line_end
)
15242 /* state machine registers */
15243 CORE_ADDR address
= 0;
15244 unsigned int file
= 1;
15245 unsigned int line
= 1;
15246 unsigned int column
= 0;
15247 int is_stmt
= lh
->default_is_stmt
;
15248 int basic_block
= 0;
15249 int end_sequence
= 0;
15251 unsigned char op_index
= 0;
15253 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
15255 /* Start a subfile for the current file of the state machine. */
15256 /* lh->include_dirs and lh->file_names are 0-based, but the
15257 directory and file name numbers in the statement program
15259 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15263 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15265 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15268 /* Decode the table. */
15269 while (!end_sequence
)
15271 op_code
= read_1_byte (abfd
, line_ptr
);
15273 if (line_ptr
> line_end
)
15275 dwarf2_debug_line_missing_end_sequence_complaint ();
15279 if (op_code
>= lh
->opcode_base
)
15281 /* Special operand. */
15282 adj_opcode
= op_code
- lh
->opcode_base
;
15283 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
15284 / lh
->maximum_ops_per_instruction
)
15285 * lh
->minimum_instruction_length
);
15286 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
15287 % lh
->maximum_ops_per_instruction
);
15288 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
15289 if (lh
->num_file_names
< file
|| file
== 0)
15290 dwarf2_debug_line_missing_file_complaint ();
15291 /* For now we ignore lines not starting on an
15292 instruction boundary. */
15293 else if (op_index
== 0)
15295 lh
->file_names
[file
- 1].included_p
= 1;
15296 if (!decode_for_pst_p
&& is_stmt
)
15298 if (last_subfile
!= current_subfile
)
15300 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15302 (*p_record_line
) (last_subfile
, 0, addr
);
15303 last_subfile
= current_subfile
;
15305 /* Append row to matrix using current values. */
15306 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15307 (*p_record_line
) (current_subfile
, line
, addr
);
15312 else switch (op_code
)
15314 case DW_LNS_extended_op
:
15315 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
15317 line_ptr
+= bytes_read
;
15318 extended_end
= line_ptr
+ extended_len
;
15319 extended_op
= read_1_byte (abfd
, line_ptr
);
15321 switch (extended_op
)
15323 case DW_LNE_end_sequence
:
15324 p_record_line
= record_line
;
15327 case DW_LNE_set_address
:
15328 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
15330 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15332 /* This line table is for a function which has been
15333 GCd by the linker. Ignore it. PR gdb/12528 */
15336 = line_ptr
- get_debug_line_section (cu
)->buffer
;
15338 complaint (&symfile_complaints
,
15339 _(".debug_line address at offset 0x%lx is 0 "
15341 line_offset
, objfile
->name
);
15342 p_record_line
= noop_record_line
;
15346 line_ptr
+= bytes_read
;
15347 address
+= baseaddr
;
15349 case DW_LNE_define_file
:
15352 unsigned int dir_index
, mod_time
, length
;
15354 cur_file
= read_direct_string (abfd
, line_ptr
,
15356 line_ptr
+= bytes_read
;
15358 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15359 line_ptr
+= bytes_read
;
15361 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15362 line_ptr
+= bytes_read
;
15364 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15365 line_ptr
+= bytes_read
;
15366 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
15369 case DW_LNE_set_discriminator
:
15370 /* The discriminator is not interesting to the debugger;
15372 line_ptr
= extended_end
;
15375 complaint (&symfile_complaints
,
15376 _("mangled .debug_line section"));
15379 /* Make sure that we parsed the extended op correctly. If e.g.
15380 we expected a different address size than the producer used,
15381 we may have read the wrong number of bytes. */
15382 if (line_ptr
!= extended_end
)
15384 complaint (&symfile_complaints
,
15385 _("mangled .debug_line section"));
15390 if (lh
->num_file_names
< file
|| file
== 0)
15391 dwarf2_debug_line_missing_file_complaint ();
15394 lh
->file_names
[file
- 1].included_p
= 1;
15395 if (!decode_for_pst_p
&& is_stmt
)
15397 if (last_subfile
!= current_subfile
)
15399 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15401 (*p_record_line
) (last_subfile
, 0, addr
);
15402 last_subfile
= current_subfile
;
15404 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15405 (*p_record_line
) (current_subfile
, line
, addr
);
15410 case DW_LNS_advance_pc
:
15413 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15415 address
+= (((op_index
+ adjust
)
15416 / lh
->maximum_ops_per_instruction
)
15417 * lh
->minimum_instruction_length
);
15418 op_index
= ((op_index
+ adjust
)
15419 % lh
->maximum_ops_per_instruction
);
15420 line_ptr
+= bytes_read
;
15423 case DW_LNS_advance_line
:
15424 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
15425 line_ptr
+= bytes_read
;
15427 case DW_LNS_set_file
:
15429 /* The arrays lh->include_dirs and lh->file_names are
15430 0-based, but the directory and file name numbers in
15431 the statement program are 1-based. */
15432 struct file_entry
*fe
;
15435 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15436 line_ptr
+= bytes_read
;
15437 if (lh
->num_file_names
< file
|| file
== 0)
15438 dwarf2_debug_line_missing_file_complaint ();
15441 fe
= &lh
->file_names
[file
- 1];
15443 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15444 if (!decode_for_pst_p
)
15446 last_subfile
= current_subfile
;
15447 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15452 case DW_LNS_set_column
:
15453 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15454 line_ptr
+= bytes_read
;
15456 case DW_LNS_negate_stmt
:
15457 is_stmt
= (!is_stmt
);
15459 case DW_LNS_set_basic_block
:
15462 /* Add to the address register of the state machine the
15463 address increment value corresponding to special opcode
15464 255. I.e., this value is scaled by the minimum
15465 instruction length since special opcode 255 would have
15466 scaled the increment. */
15467 case DW_LNS_const_add_pc
:
15469 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
15471 address
+= (((op_index
+ adjust
)
15472 / lh
->maximum_ops_per_instruction
)
15473 * lh
->minimum_instruction_length
);
15474 op_index
= ((op_index
+ adjust
)
15475 % lh
->maximum_ops_per_instruction
);
15478 case DW_LNS_fixed_advance_pc
:
15479 address
+= read_2_bytes (abfd
, line_ptr
);
15485 /* Unknown standard opcode, ignore it. */
15488 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
15490 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
15491 line_ptr
+= bytes_read
;
15496 if (lh
->num_file_names
< file
|| file
== 0)
15497 dwarf2_debug_line_missing_file_complaint ();
15500 lh
->file_names
[file
- 1].included_p
= 1;
15501 if (!decode_for_pst_p
)
15503 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
15504 (*p_record_line
) (current_subfile
, 0, addr
);
15510 /* Decode the Line Number Program (LNP) for the given line_header
15511 structure and CU. The actual information extracted and the type
15512 of structures created from the LNP depends on the value of PST.
15514 1. If PST is NULL, then this procedure uses the data from the program
15515 to create all necessary symbol tables, and their linetables.
15517 2. If PST is not NULL, this procedure reads the program to determine
15518 the list of files included by the unit represented by PST, and
15519 builds all the associated partial symbol tables.
15521 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
15522 It is used for relative paths in the line table.
15523 NOTE: When processing partial symtabs (pst != NULL),
15524 comp_dir == pst->dirname.
15526 NOTE: It is important that psymtabs have the same file name (via strcmp)
15527 as the corresponding symtab. Since COMP_DIR is not used in the name of the
15528 symtab we don't use it in the name of the psymtabs we create.
15529 E.g. expand_line_sal requires this when finding psymtabs to expand.
15530 A good testcase for this is mb-inline.exp. */
15533 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
15534 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
15535 int want_line_info
)
15537 struct objfile
*objfile
= cu
->objfile
;
15538 const int decode_for_pst_p
= (pst
!= NULL
);
15539 struct subfile
*first_subfile
= current_subfile
;
15541 if (want_line_info
)
15542 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
15544 if (decode_for_pst_p
)
15548 /* Now that we're done scanning the Line Header Program, we can
15549 create the psymtab of each included file. */
15550 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
15551 if (lh
->file_names
[file_index
].included_p
== 1)
15553 char *include_name
=
15554 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
15555 if (include_name
!= NULL
)
15556 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
15561 /* Make sure a symtab is created for every file, even files
15562 which contain only variables (i.e. no code with associated
15566 for (i
= 0; i
< lh
->num_file_names
; i
++)
15569 struct file_entry
*fe
;
15571 fe
= &lh
->file_names
[i
];
15573 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15574 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
15576 /* Skip the main file; we don't need it, and it must be
15577 allocated last, so that it will show up before the
15578 non-primary symtabs in the objfile's symtab list. */
15579 if (current_subfile
== first_subfile
)
15582 if (current_subfile
->symtab
== NULL
)
15583 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
15585 fe
->symtab
= current_subfile
->symtab
;
15590 /* Start a subfile for DWARF. FILENAME is the name of the file and
15591 DIRNAME the name of the source directory which contains FILENAME
15592 or NULL if not known. COMP_DIR is the compilation directory for the
15593 linetable's compilation unit or NULL if not known.
15594 This routine tries to keep line numbers from identical absolute and
15595 relative file names in a common subfile.
15597 Using the `list' example from the GDB testsuite, which resides in
15598 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
15599 of /srcdir/list0.c yields the following debugging information for list0.c:
15601 DW_AT_name: /srcdir/list0.c
15602 DW_AT_comp_dir: /compdir
15603 files.files[0].name: list0.h
15604 files.files[0].dir: /srcdir
15605 files.files[1].name: list0.c
15606 files.files[1].dir: /srcdir
15608 The line number information for list0.c has to end up in a single
15609 subfile, so that `break /srcdir/list0.c:1' works as expected.
15610 start_subfile will ensure that this happens provided that we pass the
15611 concatenation of files.files[1].dir and files.files[1].name as the
15615 dwarf2_start_subfile (char *filename
, const char *dirname
,
15616 const char *comp_dir
)
15620 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
15621 `start_symtab' will always pass the contents of DW_AT_comp_dir as
15622 second argument to start_subfile. To be consistent, we do the
15623 same here. In order not to lose the line information directory,
15624 we concatenate it to the filename when it makes sense.
15625 Note that the Dwarf3 standard says (speaking of filenames in line
15626 information): ``The directory index is ignored for file names
15627 that represent full path names''. Thus ignoring dirname in the
15628 `else' branch below isn't an issue. */
15630 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
15631 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
15633 fullname
= filename
;
15635 start_subfile (fullname
, comp_dir
);
15637 if (fullname
!= filename
)
15641 /* Start a symtab for DWARF.
15642 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
15645 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
15646 char *name
, char *comp_dir
, CORE_ADDR low_pc
)
15648 start_symtab (name
, comp_dir
, low_pc
);
15649 record_debugformat ("DWARF 2");
15650 record_producer (cu
->producer
);
15652 /* We assume that we're processing GCC output. */
15653 processing_gcc_compilation
= 2;
15655 processing_has_namespace_info
= 0;
15659 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
15660 struct dwarf2_cu
*cu
)
15662 struct objfile
*objfile
= cu
->objfile
;
15663 struct comp_unit_head
*cu_header
= &cu
->header
;
15665 /* NOTE drow/2003-01-30: There used to be a comment and some special
15666 code here to turn a symbol with DW_AT_external and a
15667 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
15668 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
15669 with some versions of binutils) where shared libraries could have
15670 relocations against symbols in their debug information - the
15671 minimal symbol would have the right address, but the debug info
15672 would not. It's no longer necessary, because we will explicitly
15673 apply relocations when we read in the debug information now. */
15675 /* A DW_AT_location attribute with no contents indicates that a
15676 variable has been optimized away. */
15677 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
15679 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15683 /* Handle one degenerate form of location expression specially, to
15684 preserve GDB's previous behavior when section offsets are
15685 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
15686 then mark this symbol as LOC_STATIC. */
15688 if (attr_form_is_block (attr
)
15689 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
15690 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
15691 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
15692 && (DW_BLOCK (attr
)->size
15693 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
15695 unsigned int dummy
;
15697 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
15698 SYMBOL_VALUE_ADDRESS (sym
) =
15699 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
15701 SYMBOL_VALUE_ADDRESS (sym
) =
15702 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
15703 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15704 fixup_symbol_section (sym
, objfile
);
15705 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
15706 SYMBOL_SECTION (sym
));
15710 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
15711 expression evaluator, and use LOC_COMPUTED only when necessary
15712 (i.e. when the value of a register or memory location is
15713 referenced, or a thread-local block, etc.). Then again, it might
15714 not be worthwhile. I'm assuming that it isn't unless performance
15715 or memory numbers show me otherwise. */
15717 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
15718 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15720 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
15721 cu
->has_loclist
= 1;
15724 /* Given a pointer to a DWARF information entry, figure out if we need
15725 to make a symbol table entry for it, and if so, create a new entry
15726 and return a pointer to it.
15727 If TYPE is NULL, determine symbol type from the die, otherwise
15728 used the passed type.
15729 If SPACE is not NULL, use it to hold the new symbol. If it is
15730 NULL, allocate a new symbol on the objfile's obstack. */
15732 static struct symbol
*
15733 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
15734 struct symbol
*space
)
15736 struct objfile
*objfile
= cu
->objfile
;
15737 struct symbol
*sym
= NULL
;
15739 struct attribute
*attr
= NULL
;
15740 struct attribute
*attr2
= NULL
;
15741 CORE_ADDR baseaddr
;
15742 struct pending
**list_to_add
= NULL
;
15744 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
15746 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15748 name
= dwarf2_name (die
, cu
);
15751 const char *linkagename
;
15752 int suppress_add
= 0;
15757 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
15758 OBJSTAT (objfile
, n_syms
++);
15760 /* Cache this symbol's name and the name's demangled form (if any). */
15761 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
15762 linkagename
= dwarf2_physname (name
, die
, cu
);
15763 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
15765 /* Fortran does not have mangling standard and the mangling does differ
15766 between gfortran, iFort etc. */
15767 if (cu
->language
== language_fortran
15768 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
15769 symbol_set_demangled_name (&(sym
->ginfo
),
15770 (char *) dwarf2_full_name (name
, die
, cu
),
15773 /* Default assumptions.
15774 Use the passed type or decode it from the die. */
15775 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15776 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
15778 SYMBOL_TYPE (sym
) = type
;
15780 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
15781 attr
= dwarf2_attr (die
,
15782 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
15786 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
15789 attr
= dwarf2_attr (die
,
15790 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
15794 int file_index
= DW_UNSND (attr
);
15796 if (cu
->line_header
== NULL
15797 || file_index
> cu
->line_header
->num_file_names
)
15798 complaint (&symfile_complaints
,
15799 _("file index out of range"));
15800 else if (file_index
> 0)
15802 struct file_entry
*fe
;
15804 fe
= &cu
->line_header
->file_names
[file_index
- 1];
15805 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
15812 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
15815 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
15817 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
15818 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
15819 SYMBOL_CLASS (sym
) = LOC_LABEL
;
15820 add_symbol_to_list (sym
, cu
->list_in_scope
);
15822 case DW_TAG_subprogram
:
15823 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15825 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15826 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15827 if ((attr2
&& (DW_UNSND (attr2
) != 0))
15828 || cu
->language
== language_ada
)
15830 /* Subprograms marked external are stored as a global symbol.
15831 Ada subprograms, whether marked external or not, are always
15832 stored as a global symbol, because we want to be able to
15833 access them globally. For instance, we want to be able
15834 to break on a nested subprogram without having to
15835 specify the context. */
15836 list_to_add
= &global_symbols
;
15840 list_to_add
= cu
->list_in_scope
;
15843 case DW_TAG_inlined_subroutine
:
15844 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
15846 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
15847 SYMBOL_INLINED (sym
) = 1;
15848 list_to_add
= cu
->list_in_scope
;
15850 case DW_TAG_template_value_param
:
15852 /* Fall through. */
15853 case DW_TAG_constant
:
15854 case DW_TAG_variable
:
15855 case DW_TAG_member
:
15856 /* Compilation with minimal debug info may result in
15857 variables with missing type entries. Change the
15858 misleading `void' type to something sensible. */
15859 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
15861 = objfile_type (objfile
)->nodebug_data_symbol
;
15863 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15864 /* In the case of DW_TAG_member, we should only be called for
15865 static const members. */
15866 if (die
->tag
== DW_TAG_member
)
15868 /* dwarf2_add_field uses die_is_declaration,
15869 so we do the same. */
15870 gdb_assert (die_is_declaration (die
, cu
));
15875 dwarf2_const_value (attr
, sym
, cu
);
15876 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15879 if (attr2
&& (DW_UNSND (attr2
) != 0))
15880 list_to_add
= &global_symbols
;
15882 list_to_add
= cu
->list_in_scope
;
15886 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15889 var_decode_location (attr
, sym
, cu
);
15890 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15892 /* Fortran explicitly imports any global symbols to the local
15893 scope by DW_TAG_common_block. */
15894 if (cu
->language
== language_fortran
&& die
->parent
15895 && die
->parent
->tag
== DW_TAG_common_block
)
15898 if (SYMBOL_CLASS (sym
) == LOC_STATIC
15899 && SYMBOL_VALUE_ADDRESS (sym
) == 0
15900 && !dwarf2_per_objfile
->has_section_at_zero
)
15902 /* When a static variable is eliminated by the linker,
15903 the corresponding debug information is not stripped
15904 out, but the variable address is set to null;
15905 do not add such variables into symbol table. */
15907 else if (attr2
&& (DW_UNSND (attr2
) != 0))
15909 /* Workaround gfortran PR debug/40040 - it uses
15910 DW_AT_location for variables in -fPIC libraries which may
15911 get overriden by other libraries/executable and get
15912 a different address. Resolve it by the minimal symbol
15913 which may come from inferior's executable using copy
15914 relocation. Make this workaround only for gfortran as for
15915 other compilers GDB cannot guess the minimal symbol
15916 Fortran mangling kind. */
15917 if (cu
->language
== language_fortran
&& die
->parent
15918 && die
->parent
->tag
== DW_TAG_module
15920 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
15921 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15923 /* A variable with DW_AT_external is never static,
15924 but it may be block-scoped. */
15925 list_to_add
= (cu
->list_in_scope
== &file_symbols
15926 ? &global_symbols
: cu
->list_in_scope
);
15929 list_to_add
= cu
->list_in_scope
;
15933 /* We do not know the address of this symbol.
15934 If it is an external symbol and we have type information
15935 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15936 The address of the variable will then be determined from
15937 the minimal symbol table whenever the variable is
15939 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15941 /* Fortran explicitly imports any global symbols to the local
15942 scope by DW_TAG_common_block. */
15943 if (cu
->language
== language_fortran
&& die
->parent
15944 && die
->parent
->tag
== DW_TAG_common_block
)
15946 /* SYMBOL_CLASS doesn't matter here because
15947 read_common_block is going to reset it. */
15949 list_to_add
= cu
->list_in_scope
;
15951 else if (attr2
&& (DW_UNSND (attr2
) != 0)
15952 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
15954 /* A variable with DW_AT_external is never static, but it
15955 may be block-scoped. */
15956 list_to_add
= (cu
->list_in_scope
== &file_symbols
15957 ? &global_symbols
: cu
->list_in_scope
);
15959 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15961 else if (!die_is_declaration (die
, cu
))
15963 /* Use the default LOC_OPTIMIZED_OUT class. */
15964 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15966 list_to_add
= cu
->list_in_scope
;
15970 case DW_TAG_formal_parameter
:
15971 /* If we are inside a function, mark this as an argument. If
15972 not, we might be looking at an argument to an inlined function
15973 when we do not have enough information to show inlined frames;
15974 pretend it's a local variable in that case so that the user can
15976 if (context_stack_depth
> 0
15977 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15978 SYMBOL_IS_ARGUMENT (sym
) = 1;
15979 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15982 var_decode_location (attr
, sym
, cu
);
15984 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15987 dwarf2_const_value (attr
, sym
, cu
);
15990 list_to_add
= cu
->list_in_scope
;
15992 case DW_TAG_unspecified_parameters
:
15993 /* From varargs functions; gdb doesn't seem to have any
15994 interest in this information, so just ignore it for now.
15997 case DW_TAG_template_type_param
:
15999 /* Fall through. */
16000 case DW_TAG_class_type
:
16001 case DW_TAG_interface_type
:
16002 case DW_TAG_structure_type
:
16003 case DW_TAG_union_type
:
16004 case DW_TAG_set_type
:
16005 case DW_TAG_enumeration_type
:
16006 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16007 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
16010 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
16011 really ever be static objects: otherwise, if you try
16012 to, say, break of a class's method and you're in a file
16013 which doesn't mention that class, it won't work unless
16014 the check for all static symbols in lookup_symbol_aux
16015 saves you. See the OtherFileClass tests in
16016 gdb.c++/namespace.exp. */
16020 list_to_add
= (cu
->list_in_scope
== &file_symbols
16021 && (cu
->language
== language_cplus
16022 || cu
->language
== language_java
)
16023 ? &global_symbols
: cu
->list_in_scope
);
16025 /* The semantics of C++ state that "struct foo {
16026 ... }" also defines a typedef for "foo". A Java
16027 class declaration also defines a typedef for the
16029 if (cu
->language
== language_cplus
16030 || cu
->language
== language_java
16031 || cu
->language
== language_ada
)
16033 /* The symbol's name is already allocated along
16034 with this objfile, so we don't need to
16035 duplicate it for the type. */
16036 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
16037 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
16042 case DW_TAG_typedef
:
16043 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16044 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16045 list_to_add
= cu
->list_in_scope
;
16047 case DW_TAG_base_type
:
16048 case DW_TAG_subrange_type
:
16049 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16050 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
16051 list_to_add
= cu
->list_in_scope
;
16053 case DW_TAG_enumerator
:
16054 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
16057 dwarf2_const_value (attr
, sym
, cu
);
16060 /* NOTE: carlton/2003-11-10: See comment above in the
16061 DW_TAG_class_type, etc. block. */
16063 list_to_add
= (cu
->list_in_scope
== &file_symbols
16064 && (cu
->language
== language_cplus
16065 || cu
->language
== language_java
)
16066 ? &global_symbols
: cu
->list_in_scope
);
16069 case DW_TAG_namespace
:
16070 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
16071 list_to_add
= &global_symbols
;
16073 case DW_TAG_common_block
:
16074 SYMBOL_CLASS (sym
) = LOC_COMMON_BLOCK
;
16075 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
16076 add_symbol_to_list (sym
, cu
->list_in_scope
);
16079 /* Not a tag we recognize. Hopefully we aren't processing
16080 trash data, but since we must specifically ignore things
16081 we don't recognize, there is nothing else we should do at
16083 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
16084 dwarf_tag_name (die
->tag
));
16090 sym
->hash_next
= objfile
->template_symbols
;
16091 objfile
->template_symbols
= sym
;
16092 list_to_add
= NULL
;
16095 if (list_to_add
!= NULL
)
16096 add_symbol_to_list (sym
, list_to_add
);
16098 /* For the benefit of old versions of GCC, check for anonymous
16099 namespaces based on the demangled name. */
16100 if (!processing_has_namespace_info
16101 && cu
->language
== language_cplus
)
16102 cp_scan_for_anonymous_namespaces (sym
, objfile
);
16107 /* A wrapper for new_symbol_full that always allocates a new symbol. */
16109 static struct symbol
*
16110 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16112 return new_symbol_full (die
, type
, cu
, NULL
);
16115 /* Given an attr with a DW_FORM_dataN value in host byte order,
16116 zero-extend it as appropriate for the symbol's type. The DWARF
16117 standard (v4) is not entirely clear about the meaning of using
16118 DW_FORM_dataN for a constant with a signed type, where the type is
16119 wider than the data. The conclusion of a discussion on the DWARF
16120 list was that this is unspecified. We choose to always zero-extend
16121 because that is the interpretation long in use by GCC. */
16124 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
16125 const char *name
, struct obstack
*obstack
,
16126 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
16128 struct objfile
*objfile
= cu
->objfile
;
16129 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
16130 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
16131 LONGEST l
= DW_UNSND (attr
);
16133 if (bits
< sizeof (*value
) * 8)
16135 l
&= ((LONGEST
) 1 << bits
) - 1;
16138 else if (bits
== sizeof (*value
) * 8)
16142 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
16143 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
16150 /* Read a constant value from an attribute. Either set *VALUE, or if
16151 the value does not fit in *VALUE, set *BYTES - either already
16152 allocated on the objfile obstack, or newly allocated on OBSTACK,
16153 or, set *BATON, if we translated the constant to a location
16157 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
16158 const char *name
, struct obstack
*obstack
,
16159 struct dwarf2_cu
*cu
,
16160 LONGEST
*value
, gdb_byte
**bytes
,
16161 struct dwarf2_locexpr_baton
**baton
)
16163 struct objfile
*objfile
= cu
->objfile
;
16164 struct comp_unit_head
*cu_header
= &cu
->header
;
16165 struct dwarf_block
*blk
;
16166 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
16167 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
16173 switch (attr
->form
)
16176 case DW_FORM_GNU_addr_index
:
16180 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
16181 dwarf2_const_value_length_mismatch_complaint (name
,
16182 cu_header
->addr_size
,
16183 TYPE_LENGTH (type
));
16184 /* Symbols of this form are reasonably rare, so we just
16185 piggyback on the existing location code rather than writing
16186 a new implementation of symbol_computed_ops. */
16187 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
16188 sizeof (struct dwarf2_locexpr_baton
));
16189 (*baton
)->per_cu
= cu
->per_cu
;
16190 gdb_assert ((*baton
)->per_cu
);
16192 (*baton
)->size
= 2 + cu_header
->addr_size
;
16193 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
16194 (*baton
)->data
= data
;
16196 data
[0] = DW_OP_addr
;
16197 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
16198 byte_order
, DW_ADDR (attr
));
16199 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
16202 case DW_FORM_string
:
16204 case DW_FORM_GNU_str_index
:
16205 case DW_FORM_GNU_strp_alt
:
16206 /* DW_STRING is already allocated on the objfile obstack, point
16208 *bytes
= (gdb_byte
*) DW_STRING (attr
);
16210 case DW_FORM_block1
:
16211 case DW_FORM_block2
:
16212 case DW_FORM_block4
:
16213 case DW_FORM_block
:
16214 case DW_FORM_exprloc
:
16215 blk
= DW_BLOCK (attr
);
16216 if (TYPE_LENGTH (type
) != blk
->size
)
16217 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
16218 TYPE_LENGTH (type
));
16219 *bytes
= blk
->data
;
16222 /* The DW_AT_const_value attributes are supposed to carry the
16223 symbol's value "represented as it would be on the target
16224 architecture." By the time we get here, it's already been
16225 converted to host endianness, so we just need to sign- or
16226 zero-extend it as appropriate. */
16227 case DW_FORM_data1
:
16228 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16229 obstack
, cu
, value
, 8);
16231 case DW_FORM_data2
:
16232 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16233 obstack
, cu
, value
, 16);
16235 case DW_FORM_data4
:
16236 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16237 obstack
, cu
, value
, 32);
16239 case DW_FORM_data8
:
16240 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
16241 obstack
, cu
, value
, 64);
16244 case DW_FORM_sdata
:
16245 *value
= DW_SND (attr
);
16248 case DW_FORM_udata
:
16249 *value
= DW_UNSND (attr
);
16253 complaint (&symfile_complaints
,
16254 _("unsupported const value attribute form: '%s'"),
16255 dwarf_form_name (attr
->form
));
16262 /* Copy constant value from an attribute to a symbol. */
16265 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
16266 struct dwarf2_cu
*cu
)
16268 struct objfile
*objfile
= cu
->objfile
;
16269 struct comp_unit_head
*cu_header
= &cu
->header
;
16272 struct dwarf2_locexpr_baton
*baton
;
16274 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
16275 SYMBOL_PRINT_NAME (sym
),
16276 &objfile
->objfile_obstack
, cu
,
16277 &value
, &bytes
, &baton
);
16281 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16282 SYMBOL_LOCATION_BATON (sym
) = baton
;
16283 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
16285 else if (bytes
!= NULL
)
16287 SYMBOL_VALUE_BYTES (sym
) = bytes
;
16288 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
16292 SYMBOL_VALUE (sym
) = value
;
16293 SYMBOL_CLASS (sym
) = LOC_CONST
;
16297 /* Return the type of the die in question using its DW_AT_type attribute. */
16299 static struct type
*
16300 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16302 struct attribute
*type_attr
;
16304 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16307 /* A missing DW_AT_type represents a void type. */
16308 return objfile_type (cu
->objfile
)->builtin_void
;
16311 return lookup_die_type (die
, type_attr
, cu
);
16314 /* True iff CU's producer generates GNAT Ada auxiliary information
16315 that allows to find parallel types through that information instead
16316 of having to do expensive parallel lookups by type name. */
16319 need_gnat_info (struct dwarf2_cu
*cu
)
16321 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
16322 of GNAT produces this auxiliary information, without any indication
16323 that it is produced. Part of enhancing the FSF version of GNAT
16324 to produce that information will be to put in place an indicator
16325 that we can use in order to determine whether the descriptive type
16326 info is available or not. One suggestion that has been made is
16327 to use a new attribute, attached to the CU die. For now, assume
16328 that the descriptive type info is not available. */
16332 /* Return the auxiliary type of the die in question using its
16333 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
16334 attribute is not present. */
16336 static struct type
*
16337 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16339 struct attribute
*type_attr
;
16341 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
16345 return lookup_die_type (die
, type_attr
, cu
);
16348 /* If DIE has a descriptive_type attribute, then set the TYPE's
16349 descriptive type accordingly. */
16352 set_descriptive_type (struct type
*type
, struct die_info
*die
,
16353 struct dwarf2_cu
*cu
)
16355 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
16357 if (descriptive_type
)
16359 ALLOCATE_GNAT_AUX_TYPE (type
);
16360 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
16364 /* Return the containing type of the die in question using its
16365 DW_AT_containing_type attribute. */
16367 static struct type
*
16368 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16370 struct attribute
*type_attr
;
16372 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
16374 error (_("Dwarf Error: Problem turning containing type into gdb type "
16375 "[in module %s]"), cu
->objfile
->name
);
16377 return lookup_die_type (die
, type_attr
, cu
);
16380 /* Look up the type of DIE in CU using its type attribute ATTR.
16381 If there is no type substitute an error marker. */
16383 static struct type
*
16384 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
16385 struct dwarf2_cu
*cu
)
16387 struct objfile
*objfile
= cu
->objfile
;
16388 struct type
*this_type
;
16390 /* First see if we have it cached. */
16392 if (attr
->form
== DW_FORM_GNU_ref_alt
)
16394 struct dwarf2_per_cu_data
*per_cu
;
16395 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16397 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
16398 this_type
= get_die_type_at_offset (offset
, per_cu
);
16400 else if (is_ref_attr (attr
))
16402 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16404 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
16406 else if (attr
->form
== DW_FORM_ref_sig8
)
16408 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16410 /* sig_type will be NULL if the signatured type is missing from
16412 if (sig_type
== NULL
)
16413 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16414 "at 0x%x [in module %s]"),
16415 die
->offset
.sect_off
, objfile
->name
);
16417 gdb_assert (sig_type
->per_cu
.is_debug_types
);
16418 /* If we haven't filled in type_offset_in_section yet, then we
16419 haven't read the type in yet. */
16421 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
16424 get_die_type_at_offset (sig_type
->type_offset_in_section
,
16425 &sig_type
->per_cu
);
16430 dump_die_for_error (die
);
16431 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
16432 dwarf_attr_name (attr
->name
), objfile
->name
);
16435 /* If not cached we need to read it in. */
16437 if (this_type
== NULL
)
16439 struct die_info
*type_die
;
16440 struct dwarf2_cu
*type_cu
= cu
;
16442 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
16443 /* If we found the type now, it's probably because the type came
16444 from an inter-CU reference and the type's CU got expanded before
16446 this_type
= get_die_type (type_die
, type_cu
);
16447 if (this_type
== NULL
)
16448 this_type
= read_type_die_1 (type_die
, type_cu
);
16451 /* If we still don't have a type use an error marker. */
16453 if (this_type
== NULL
)
16455 char *message
, *saved
;
16457 /* read_type_die already issued a complaint. */
16458 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
16460 cu
->header
.offset
.sect_off
,
16461 die
->offset
.sect_off
);
16462 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
16463 message
, strlen (message
));
16466 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
16472 /* Return the type in DIE, CU.
16473 Returns NULL for invalid types.
16475 This first does a lookup in the appropriate type_hash table,
16476 and only reads the die in if necessary.
16478 NOTE: This can be called when reading in partial or full symbols. */
16480 static struct type
*
16481 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
16483 struct type
*this_type
;
16485 this_type
= get_die_type (die
, cu
);
16489 return read_type_die_1 (die
, cu
);
16492 /* Read the type in DIE, CU.
16493 Returns NULL for invalid types. */
16495 static struct type
*
16496 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
16498 struct type
*this_type
= NULL
;
16502 case DW_TAG_class_type
:
16503 case DW_TAG_interface_type
:
16504 case DW_TAG_structure_type
:
16505 case DW_TAG_union_type
:
16506 this_type
= read_structure_type (die
, cu
);
16508 case DW_TAG_enumeration_type
:
16509 this_type
= read_enumeration_type (die
, cu
);
16511 case DW_TAG_subprogram
:
16512 case DW_TAG_subroutine_type
:
16513 case DW_TAG_inlined_subroutine
:
16514 this_type
= read_subroutine_type (die
, cu
);
16516 case DW_TAG_array_type
:
16517 this_type
= read_array_type (die
, cu
);
16519 case DW_TAG_set_type
:
16520 this_type
= read_set_type (die
, cu
);
16522 case DW_TAG_pointer_type
:
16523 this_type
= read_tag_pointer_type (die
, cu
);
16525 case DW_TAG_ptr_to_member_type
:
16526 this_type
= read_tag_ptr_to_member_type (die
, cu
);
16528 case DW_TAG_reference_type
:
16529 this_type
= read_tag_reference_type (die
, cu
);
16531 case DW_TAG_const_type
:
16532 this_type
= read_tag_const_type (die
, cu
);
16534 case DW_TAG_volatile_type
:
16535 this_type
= read_tag_volatile_type (die
, cu
);
16537 case DW_TAG_restrict_type
:
16538 this_type
= read_tag_restrict_type (die
, cu
);
16540 case DW_TAG_string_type
:
16541 this_type
= read_tag_string_type (die
, cu
);
16543 case DW_TAG_typedef
:
16544 this_type
= read_typedef (die
, cu
);
16546 case DW_TAG_subrange_type
:
16547 this_type
= read_subrange_type (die
, cu
);
16549 case DW_TAG_base_type
:
16550 this_type
= read_base_type (die
, cu
);
16552 case DW_TAG_unspecified_type
:
16553 this_type
= read_unspecified_type (die
, cu
);
16555 case DW_TAG_namespace
:
16556 this_type
= read_namespace_type (die
, cu
);
16558 case DW_TAG_module
:
16559 this_type
= read_module_type (die
, cu
);
16562 complaint (&symfile_complaints
,
16563 _("unexpected tag in read_type_die: '%s'"),
16564 dwarf_tag_name (die
->tag
));
16571 /* See if we can figure out if the class lives in a namespace. We do
16572 this by looking for a member function; its demangled name will
16573 contain namespace info, if there is any.
16574 Return the computed name or NULL.
16575 Space for the result is allocated on the objfile's obstack.
16576 This is the full-die version of guess_partial_die_structure_name.
16577 In this case we know DIE has no useful parent. */
16580 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16582 struct die_info
*spec_die
;
16583 struct dwarf2_cu
*spec_cu
;
16584 struct die_info
*child
;
16587 spec_die
= die_specification (die
, &spec_cu
);
16588 if (spec_die
!= NULL
)
16594 for (child
= die
->child
;
16596 child
= child
->sibling
)
16598 if (child
->tag
== DW_TAG_subprogram
)
16600 struct attribute
*attr
;
16602 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
16604 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
16608 = language_class_name_from_physname (cu
->language_defn
,
16612 if (actual_name
!= NULL
)
16614 char *die_name
= dwarf2_name (die
, cu
);
16616 if (die_name
!= NULL
16617 && strcmp (die_name
, actual_name
) != 0)
16619 /* Strip off the class name from the full name.
16620 We want the prefix. */
16621 int die_name_len
= strlen (die_name
);
16622 int actual_name_len
= strlen (actual_name
);
16624 /* Test for '::' as a sanity check. */
16625 if (actual_name_len
> die_name_len
+ 2
16626 && actual_name
[actual_name_len
16627 - die_name_len
- 1] == ':')
16629 obsavestring (actual_name
,
16630 actual_name_len
- die_name_len
- 2,
16631 &cu
->objfile
->objfile_obstack
);
16634 xfree (actual_name
);
16643 /* GCC might emit a nameless typedef that has a linkage name. Determine the
16644 prefix part in such case. See
16645 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16648 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16650 struct attribute
*attr
;
16653 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
16654 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
16657 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16658 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
16661 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16663 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16664 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16667 /* dwarf2_name had to be already called. */
16668 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
16670 /* Strip the base name, keep any leading namespaces/classes. */
16671 base
= strrchr (DW_STRING (attr
), ':');
16672 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
16675 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
16676 &cu
->objfile
->objfile_obstack
);
16679 /* Return the name of the namespace/class that DIE is defined within,
16680 or "" if we can't tell. The caller should not xfree the result.
16682 For example, if we're within the method foo() in the following
16692 then determine_prefix on foo's die will return "N::C". */
16694 static const char *
16695 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
16697 struct die_info
*parent
, *spec_die
;
16698 struct dwarf2_cu
*spec_cu
;
16699 struct type
*parent_type
;
16702 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
16703 && cu
->language
!= language_fortran
)
16706 retval
= anonymous_struct_prefix (die
, cu
);
16710 /* We have to be careful in the presence of DW_AT_specification.
16711 For example, with GCC 3.4, given the code
16715 // Definition of N::foo.
16719 then we'll have a tree of DIEs like this:
16721 1: DW_TAG_compile_unit
16722 2: DW_TAG_namespace // N
16723 3: DW_TAG_subprogram // declaration of N::foo
16724 4: DW_TAG_subprogram // definition of N::foo
16725 DW_AT_specification // refers to die #3
16727 Thus, when processing die #4, we have to pretend that we're in
16728 the context of its DW_AT_specification, namely the contex of die
16731 spec_die
= die_specification (die
, &spec_cu
);
16732 if (spec_die
== NULL
)
16733 parent
= die
->parent
;
16736 parent
= spec_die
->parent
;
16740 if (parent
== NULL
)
16742 else if (parent
->building_fullname
)
16745 const char *parent_name
;
16747 /* It has been seen on RealView 2.2 built binaries,
16748 DW_TAG_template_type_param types actually _defined_ as
16749 children of the parent class:
16752 template class <class Enum> Class{};
16753 Class<enum E> class_e;
16755 1: DW_TAG_class_type (Class)
16756 2: DW_TAG_enumeration_type (E)
16757 3: DW_TAG_enumerator (enum1:0)
16758 3: DW_TAG_enumerator (enum2:1)
16760 2: DW_TAG_template_type_param
16761 DW_AT_type DW_FORM_ref_udata (E)
16763 Besides being broken debug info, it can put GDB into an
16764 infinite loop. Consider:
16766 When we're building the full name for Class<E>, we'll start
16767 at Class, and go look over its template type parameters,
16768 finding E. We'll then try to build the full name of E, and
16769 reach here. We're now trying to build the full name of E,
16770 and look over the parent DIE for containing scope. In the
16771 broken case, if we followed the parent DIE of E, we'd again
16772 find Class, and once again go look at its template type
16773 arguments, etc., etc. Simply don't consider such parent die
16774 as source-level parent of this die (it can't be, the language
16775 doesn't allow it), and break the loop here. */
16776 name
= dwarf2_name (die
, cu
);
16777 parent_name
= dwarf2_name (parent
, cu
);
16778 complaint (&symfile_complaints
,
16779 _("template param type '%s' defined within parent '%s'"),
16780 name
? name
: "<unknown>",
16781 parent_name
? parent_name
: "<unknown>");
16785 switch (parent
->tag
)
16787 case DW_TAG_namespace
:
16788 parent_type
= read_type_die (parent
, cu
);
16789 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
16790 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
16791 Work around this problem here. */
16792 if (cu
->language
== language_cplus
16793 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
16795 /* We give a name to even anonymous namespaces. */
16796 return TYPE_TAG_NAME (parent_type
);
16797 case DW_TAG_class_type
:
16798 case DW_TAG_interface_type
:
16799 case DW_TAG_structure_type
:
16800 case DW_TAG_union_type
:
16801 case DW_TAG_module
:
16802 parent_type
= read_type_die (parent
, cu
);
16803 if (TYPE_TAG_NAME (parent_type
) != NULL
)
16804 return TYPE_TAG_NAME (parent_type
);
16806 /* An anonymous structure is only allowed non-static data
16807 members; no typedefs, no member functions, et cetera.
16808 So it does not need a prefix. */
16810 case DW_TAG_compile_unit
:
16811 case DW_TAG_partial_unit
:
16812 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
16813 if (cu
->language
== language_cplus
16814 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16815 && die
->child
!= NULL
16816 && (die
->tag
== DW_TAG_class_type
16817 || die
->tag
== DW_TAG_structure_type
16818 || die
->tag
== DW_TAG_union_type
))
16820 char *name
= guess_full_die_structure_name (die
, cu
);
16826 return determine_prefix (parent
, cu
);
16830 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
16831 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
16832 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
16833 an obconcat, otherwise allocate storage for the result. The CU argument is
16834 used to determine the language and hence, the appropriate separator. */
16836 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
16839 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
16840 int physname
, struct dwarf2_cu
*cu
)
16842 const char *lead
= "";
16845 if (suffix
== NULL
|| suffix
[0] == '\0'
16846 || prefix
== NULL
|| prefix
[0] == '\0')
16848 else if (cu
->language
== language_java
)
16850 else if (cu
->language
== language_fortran
&& physname
)
16852 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
16853 DW_AT_MIPS_linkage_name is preferred and used instead. */
16861 if (prefix
== NULL
)
16863 if (suffix
== NULL
)
16869 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
16871 strcpy (retval
, lead
);
16872 strcat (retval
, prefix
);
16873 strcat (retval
, sep
);
16874 strcat (retval
, suffix
);
16879 /* We have an obstack. */
16880 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
16884 /* Return sibling of die, NULL if no sibling. */
16886 static struct die_info
*
16887 sibling_die (struct die_info
*die
)
16889 return die
->sibling
;
16892 /* Get name of a die, return NULL if not found. */
16895 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
16896 struct obstack
*obstack
)
16898 if (name
&& cu
->language
== language_cplus
)
16900 char *canon_name
= cp_canonicalize_string (name
);
16902 if (canon_name
!= NULL
)
16904 if (strcmp (canon_name
, name
) != 0)
16905 name
= obsavestring (canon_name
, strlen (canon_name
),
16907 xfree (canon_name
);
16914 /* Get name of a die, return NULL if not found. */
16917 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
16919 struct attribute
*attr
;
16921 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
16922 if ((!attr
|| !DW_STRING (attr
))
16923 && die
->tag
!= DW_TAG_class_type
16924 && die
->tag
!= DW_TAG_interface_type
16925 && die
->tag
!= DW_TAG_structure_type
16926 && die
->tag
!= DW_TAG_union_type
)
16931 case DW_TAG_compile_unit
:
16932 case DW_TAG_partial_unit
:
16933 /* Compilation units have a DW_AT_name that is a filename, not
16934 a source language identifier. */
16935 case DW_TAG_enumeration_type
:
16936 case DW_TAG_enumerator
:
16937 /* These tags always have simple identifiers already; no need
16938 to canonicalize them. */
16939 return DW_STRING (attr
);
16941 case DW_TAG_subprogram
:
16942 /* Java constructors will all be named "<init>", so return
16943 the class name when we see this special case. */
16944 if (cu
->language
== language_java
16945 && DW_STRING (attr
) != NULL
16946 && strcmp (DW_STRING (attr
), "<init>") == 0)
16948 struct dwarf2_cu
*spec_cu
= cu
;
16949 struct die_info
*spec_die
;
16951 /* GCJ will output '<init>' for Java constructor names.
16952 For this special case, return the name of the parent class. */
16954 /* GCJ may output suprogram DIEs with AT_specification set.
16955 If so, use the name of the specified DIE. */
16956 spec_die
= die_specification (die
, &spec_cu
);
16957 if (spec_die
!= NULL
)
16958 return dwarf2_name (spec_die
, spec_cu
);
16963 if (die
->tag
== DW_TAG_class_type
)
16964 return dwarf2_name (die
, cu
);
16966 while (die
->tag
!= DW_TAG_compile_unit
16967 && die
->tag
!= DW_TAG_partial_unit
);
16971 case DW_TAG_class_type
:
16972 case DW_TAG_interface_type
:
16973 case DW_TAG_structure_type
:
16974 case DW_TAG_union_type
:
16975 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16976 structures or unions. These were of the form "._%d" in GCC 4.1,
16977 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16978 and GCC 4.4. We work around this problem by ignoring these. */
16979 if (attr
&& DW_STRING (attr
)
16980 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16981 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16984 /* GCC might emit a nameless typedef that has a linkage name. See
16985 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16986 if (!attr
|| DW_STRING (attr
) == NULL
)
16988 char *demangled
= NULL
;
16990 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16992 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16994 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16997 /* Avoid demangling DW_STRING (attr) the second time on a second
16998 call for the same DIE. */
16999 if (!DW_STRING_IS_CANONICAL (attr
))
17000 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
17006 /* FIXME: we already did this for the partial symbol... */
17007 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
17008 &cu
->objfile
->objfile_obstack
);
17009 DW_STRING_IS_CANONICAL (attr
) = 1;
17012 /* Strip any leading namespaces/classes, keep only the base name.
17013 DW_AT_name for named DIEs does not contain the prefixes. */
17014 base
= strrchr (DW_STRING (attr
), ':');
17015 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
17018 return DW_STRING (attr
);
17027 if (!DW_STRING_IS_CANONICAL (attr
))
17030 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
17031 &cu
->objfile
->objfile_obstack
);
17032 DW_STRING_IS_CANONICAL (attr
) = 1;
17034 return DW_STRING (attr
);
17037 /* Return the die that this die in an extension of, or NULL if there
17038 is none. *EXT_CU is the CU containing DIE on input, and the CU
17039 containing the return value on output. */
17041 static struct die_info
*
17042 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
17044 struct attribute
*attr
;
17046 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
17050 return follow_die_ref (die
, attr
, ext_cu
);
17053 /* Convert a DIE tag into its string name. */
17055 static const char *
17056 dwarf_tag_name (unsigned tag
)
17058 const char *name
= get_DW_TAG_name (tag
);
17061 return "DW_TAG_<unknown>";
17066 /* Convert a DWARF attribute code into its string name. */
17068 static const char *
17069 dwarf_attr_name (unsigned attr
)
17073 #ifdef MIPS /* collides with DW_AT_HP_block_index */
17074 if (attr
== DW_AT_MIPS_fde
)
17075 return "DW_AT_MIPS_fde";
17077 if (attr
== DW_AT_HP_block_index
)
17078 return "DW_AT_HP_block_index";
17081 name
= get_DW_AT_name (attr
);
17084 return "DW_AT_<unknown>";
17089 /* Convert a DWARF value form code into its string name. */
17091 static const char *
17092 dwarf_form_name (unsigned form
)
17094 const char *name
= get_DW_FORM_name (form
);
17097 return "DW_FORM_<unknown>";
17103 dwarf_bool_name (unsigned mybool
)
17111 /* Convert a DWARF type code into its string name. */
17113 static const char *
17114 dwarf_type_encoding_name (unsigned enc
)
17116 const char *name
= get_DW_ATE_name (enc
);
17119 return "DW_ATE_<unknown>";
17125 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
17129 print_spaces (indent
, f
);
17130 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
17131 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
17133 if (die
->parent
!= NULL
)
17135 print_spaces (indent
, f
);
17136 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
17137 die
->parent
->offset
.sect_off
);
17140 print_spaces (indent
, f
);
17141 fprintf_unfiltered (f
, " has children: %s\n",
17142 dwarf_bool_name (die
->child
!= NULL
));
17144 print_spaces (indent
, f
);
17145 fprintf_unfiltered (f
, " attributes:\n");
17147 for (i
= 0; i
< die
->num_attrs
; ++i
)
17149 print_spaces (indent
, f
);
17150 fprintf_unfiltered (f
, " %s (%s) ",
17151 dwarf_attr_name (die
->attrs
[i
].name
),
17152 dwarf_form_name (die
->attrs
[i
].form
));
17154 switch (die
->attrs
[i
].form
)
17157 case DW_FORM_GNU_addr_index
:
17158 fprintf_unfiltered (f
, "address: ");
17159 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
17161 case DW_FORM_block2
:
17162 case DW_FORM_block4
:
17163 case DW_FORM_block
:
17164 case DW_FORM_block1
:
17165 fprintf_unfiltered (f
, "block: size %s",
17166 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17168 case DW_FORM_exprloc
:
17169 fprintf_unfiltered (f
, "expression: size %s",
17170 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
17172 case DW_FORM_ref_addr
:
17173 fprintf_unfiltered (f
, "ref address: ");
17174 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17176 case DW_FORM_GNU_ref_alt
:
17177 fprintf_unfiltered (f
, "alt ref address: ");
17178 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
17184 case DW_FORM_ref_udata
:
17185 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
17186 (long) (DW_UNSND (&die
->attrs
[i
])));
17188 case DW_FORM_data1
:
17189 case DW_FORM_data2
:
17190 case DW_FORM_data4
:
17191 case DW_FORM_data8
:
17192 case DW_FORM_udata
:
17193 case DW_FORM_sdata
:
17194 fprintf_unfiltered (f
, "constant: %s",
17195 pulongest (DW_UNSND (&die
->attrs
[i
])));
17197 case DW_FORM_sec_offset
:
17198 fprintf_unfiltered (f
, "section offset: %s",
17199 pulongest (DW_UNSND (&die
->attrs
[i
])));
17201 case DW_FORM_ref_sig8
:
17202 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
17203 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
17204 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
17206 fprintf_unfiltered (f
, "signatured type, offset: unknown");
17208 case DW_FORM_string
:
17210 case DW_FORM_GNU_str_index
:
17211 case DW_FORM_GNU_strp_alt
:
17212 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
17213 DW_STRING (&die
->attrs
[i
])
17214 ? DW_STRING (&die
->attrs
[i
]) : "",
17215 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
17218 if (DW_UNSND (&die
->attrs
[i
]))
17219 fprintf_unfiltered (f
, "flag: TRUE");
17221 fprintf_unfiltered (f
, "flag: FALSE");
17223 case DW_FORM_flag_present
:
17224 fprintf_unfiltered (f
, "flag: TRUE");
17226 case DW_FORM_indirect
:
17227 /* The reader will have reduced the indirect form to
17228 the "base form" so this form should not occur. */
17229 fprintf_unfiltered (f
,
17230 "unexpected attribute form: DW_FORM_indirect");
17233 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
17234 die
->attrs
[i
].form
);
17237 fprintf_unfiltered (f
, "\n");
17242 dump_die_for_error (struct die_info
*die
)
17244 dump_die_shallow (gdb_stderr
, 0, die
);
17248 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
17250 int indent
= level
* 4;
17252 gdb_assert (die
!= NULL
);
17254 if (level
>= max_level
)
17257 dump_die_shallow (f
, indent
, die
);
17259 if (die
->child
!= NULL
)
17261 print_spaces (indent
, f
);
17262 fprintf_unfiltered (f
, " Children:");
17263 if (level
+ 1 < max_level
)
17265 fprintf_unfiltered (f
, "\n");
17266 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
17270 fprintf_unfiltered (f
,
17271 " [not printed, max nesting level reached]\n");
17275 if (die
->sibling
!= NULL
&& level
> 0)
17277 dump_die_1 (f
, level
, max_level
, die
->sibling
);
17281 /* This is called from the pdie macro in gdbinit.in.
17282 It's not static so gcc will keep a copy callable from gdb. */
17285 dump_die (struct die_info
*die
, int max_level
)
17287 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
17291 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
17295 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
17301 /* DW_ADDR is always stored already as sect_offset; despite for the forms
17302 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
17305 is_ref_attr (struct attribute
*attr
)
17307 switch (attr
->form
)
17309 case DW_FORM_ref_addr
:
17314 case DW_FORM_ref_udata
:
17315 case DW_FORM_GNU_ref_alt
:
17322 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
17326 dwarf2_get_ref_die_offset (struct attribute
*attr
)
17328 sect_offset retval
= { DW_UNSND (attr
) };
17330 if (is_ref_attr (attr
))
17333 retval
.sect_off
= 0;
17334 complaint (&symfile_complaints
,
17335 _("unsupported die ref attribute form: '%s'"),
17336 dwarf_form_name (attr
->form
));
17340 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
17341 * the value held by the attribute is not constant. */
17344 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
17346 if (attr
->form
== DW_FORM_sdata
)
17347 return DW_SND (attr
);
17348 else if (attr
->form
== DW_FORM_udata
17349 || attr
->form
== DW_FORM_data1
17350 || attr
->form
== DW_FORM_data2
17351 || attr
->form
== DW_FORM_data4
17352 || attr
->form
== DW_FORM_data8
)
17353 return DW_UNSND (attr
);
17356 complaint (&symfile_complaints
,
17357 _("Attribute value is not a constant (%s)"),
17358 dwarf_form_name (attr
->form
));
17359 return default_value
;
17363 /* Follow reference or signature attribute ATTR of SRC_DIE.
17364 On entry *REF_CU is the CU of SRC_DIE.
17365 On exit *REF_CU is the CU of the result. */
17367 static struct die_info
*
17368 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
17369 struct dwarf2_cu
**ref_cu
)
17371 struct die_info
*die
;
17373 if (is_ref_attr (attr
))
17374 die
= follow_die_ref (src_die
, attr
, ref_cu
);
17375 else if (attr
->form
== DW_FORM_ref_sig8
)
17376 die
= follow_die_sig (src_die
, attr
, ref_cu
);
17379 dump_die_for_error (src_die
);
17380 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
17381 (*ref_cu
)->objfile
->name
);
17387 /* Follow reference OFFSET.
17388 On entry *REF_CU is the CU of the source die referencing OFFSET.
17389 On exit *REF_CU is the CU of the result.
17390 Returns NULL if OFFSET is invalid. */
17392 static struct die_info
*
17393 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
17394 struct dwarf2_cu
**ref_cu
)
17396 struct die_info temp_die
;
17397 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
17399 gdb_assert (cu
->per_cu
!= NULL
);
17403 if (cu
->per_cu
->is_debug_types
)
17405 /* .debug_types CUs cannot reference anything outside their CU.
17406 If they need to, they have to reference a signatured type via
17407 DW_FORM_ref_sig8. */
17408 if (! offset_in_cu_p (&cu
->header
, offset
))
17411 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
17412 || ! offset_in_cu_p (&cu
->header
, offset
))
17414 struct dwarf2_per_cu_data
*per_cu
;
17416 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
17419 /* If necessary, add it to the queue and load its DIEs. */
17420 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
17421 load_full_comp_unit (per_cu
, cu
->language
);
17423 target_cu
= per_cu
->cu
;
17425 else if (cu
->dies
== NULL
)
17427 /* We're loading full DIEs during partial symbol reading. */
17428 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
17429 load_full_comp_unit (cu
->per_cu
, language_minimal
);
17432 *ref_cu
= target_cu
;
17433 temp_die
.offset
= offset
;
17434 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
17437 /* Follow reference attribute ATTR of SRC_DIE.
17438 On entry *REF_CU is the CU of SRC_DIE.
17439 On exit *REF_CU is the CU of the result. */
17441 static struct die_info
*
17442 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
17443 struct dwarf2_cu
**ref_cu
)
17445 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
17446 struct dwarf2_cu
*cu
= *ref_cu
;
17447 struct die_info
*die
;
17449 die
= follow_die_offset (offset
,
17450 (attr
->form
== DW_FORM_GNU_ref_alt
17451 || cu
->per_cu
->is_dwz
),
17454 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
17455 "at 0x%x [in module %s]"),
17456 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
17461 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
17462 Returned value is intended for DW_OP_call*. Returned
17463 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
17465 struct dwarf2_locexpr_baton
17466 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
17467 struct dwarf2_per_cu_data
*per_cu
,
17468 CORE_ADDR (*get_frame_pc
) (void *baton
),
17471 struct dwarf2_cu
*cu
;
17472 struct die_info
*die
;
17473 struct attribute
*attr
;
17474 struct dwarf2_locexpr_baton retval
;
17476 dw2_setup (per_cu
->objfile
);
17478 if (per_cu
->cu
== NULL
)
17482 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
17484 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
17485 offset
.sect_off
, per_cu
->objfile
->name
);
17487 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17490 /* DWARF: "If there is no such attribute, then there is no effect.".
17491 DATA is ignored if SIZE is 0. */
17493 retval
.data
= NULL
;
17496 else if (attr_form_is_section_offset (attr
))
17498 struct dwarf2_loclist_baton loclist_baton
;
17499 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
17502 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
17504 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
17506 retval
.size
= size
;
17510 if (!attr_form_is_block (attr
))
17511 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
17512 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
17513 offset
.sect_off
, per_cu
->objfile
->name
);
17515 retval
.data
= DW_BLOCK (attr
)->data
;
17516 retval
.size
= DW_BLOCK (attr
)->size
;
17518 retval
.per_cu
= cu
->per_cu
;
17520 age_cached_comp_units ();
17525 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
17528 struct dwarf2_locexpr_baton
17529 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
17530 struct dwarf2_per_cu_data
*per_cu
,
17531 CORE_ADDR (*get_frame_pc
) (void *baton
),
17534 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
17536 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
17539 /* Return the type of the DIE at DIE_OFFSET in the CU named by
17543 dwarf2_get_die_type (cu_offset die_offset
,
17544 struct dwarf2_per_cu_data
*per_cu
)
17546 sect_offset die_offset_sect
;
17548 dw2_setup (per_cu
->objfile
);
17550 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
17551 return get_die_type_at_offset (die_offset_sect
, per_cu
);
17554 /* Follow the signature attribute ATTR in SRC_DIE.
17555 On entry *REF_CU is the CU of SRC_DIE.
17556 On exit *REF_CU is the CU of the result. */
17558 static struct die_info
*
17559 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
17560 struct dwarf2_cu
**ref_cu
)
17562 struct objfile
*objfile
= (*ref_cu
)->objfile
;
17563 struct die_info temp_die
;
17564 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
17565 struct dwarf2_cu
*sig_cu
;
17566 struct die_info
*die
;
17568 /* sig_type will be NULL if the signatured type is missing from
17570 if (sig_type
== NULL
)
17571 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
17572 "at 0x%x [in module %s]"),
17573 src_die
->offset
.sect_off
, objfile
->name
);
17575 /* If necessary, add it to the queue and load its DIEs. */
17577 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
17578 read_signatured_type (sig_type
);
17580 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
17582 sig_cu
= sig_type
->per_cu
.cu
;
17583 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
17584 temp_die
.offset
= sig_type
->type_offset_in_section
;
17585 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
17586 temp_die
.offset
.sect_off
);
17593 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
17594 "from DIE at 0x%x [in module %s]"),
17595 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
17598 /* Given an offset of a signatured type, return its signatured_type. */
17600 static struct signatured_type
*
17601 lookup_signatured_type_at_offset (struct objfile
*objfile
,
17602 struct dwarf2_section_info
*section
,
17603 sect_offset offset
)
17605 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
17606 unsigned int length
, initial_length_size
;
17607 unsigned int sig_offset
;
17608 struct signatured_type find_entry
, *sig_type
;
17610 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
17611 sig_offset
= (initial_length_size
17613 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
17614 + 1 /*address_size*/);
17615 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
17616 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
17618 /* This is only used to lookup previously recorded types.
17619 If we didn't find it, it's our bug. */
17620 gdb_assert (sig_type
!= NULL
);
17621 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
17626 /* Load the DIEs associated with type unit PER_CU into memory. */
17629 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
17631 struct signatured_type
*sig_type
;
17633 /* Caller is responsible for ensuring type_unit_groups don't get here. */
17634 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
17636 /* We have the per_cu, but we need the signatured_type.
17637 Fortunately this is an easy translation. */
17638 gdb_assert (per_cu
->is_debug_types
);
17639 sig_type
= (struct signatured_type
*) per_cu
;
17641 gdb_assert (per_cu
->cu
== NULL
);
17643 read_signatured_type (sig_type
);
17645 gdb_assert (per_cu
->cu
!= NULL
);
17648 /* die_reader_func for read_signatured_type.
17649 This is identical to load_full_comp_unit_reader,
17650 but is kept separate for now. */
17653 read_signatured_type_reader (const struct die_reader_specs
*reader
,
17654 gdb_byte
*info_ptr
,
17655 struct die_info
*comp_unit_die
,
17659 struct dwarf2_cu
*cu
= reader
->cu
;
17661 gdb_assert (cu
->die_hash
== NULL
);
17663 htab_create_alloc_ex (cu
->header
.length
/ 12,
17667 &cu
->comp_unit_obstack
,
17668 hashtab_obstack_allocate
,
17669 dummy_obstack_deallocate
);
17672 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
17673 &info_ptr
, comp_unit_die
);
17674 cu
->dies
= comp_unit_die
;
17675 /* comp_unit_die is not stored in die_hash, no need. */
17677 /* We try not to read any attributes in this function, because not
17678 all CUs needed for references have been loaded yet, and symbol
17679 table processing isn't initialized. But we have to set the CU language,
17680 or we won't be able to build types correctly.
17681 Similarly, if we do not read the producer, we can not apply
17682 producer-specific interpretation. */
17683 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
17686 /* Read in a signatured type and build its CU and DIEs.
17687 If the type is a stub for the real type in a DWO file,
17688 read in the real type from the DWO file as well. */
17691 read_signatured_type (struct signatured_type
*sig_type
)
17693 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
17695 gdb_assert (per_cu
->is_debug_types
);
17696 gdb_assert (per_cu
->cu
== NULL
);
17698 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
17699 read_signatured_type_reader
, NULL
);
17702 /* Decode simple location descriptions.
17703 Given a pointer to a dwarf block that defines a location, compute
17704 the location and return the value.
17706 NOTE drow/2003-11-18: This function is called in two situations
17707 now: for the address of static or global variables (partial symbols
17708 only) and for offsets into structures which are expected to be
17709 (more or less) constant. The partial symbol case should go away,
17710 and only the constant case should remain. That will let this
17711 function complain more accurately. A few special modes are allowed
17712 without complaint for global variables (for instance, global
17713 register values and thread-local values).
17715 A location description containing no operations indicates that the
17716 object is optimized out. The return value is 0 for that case.
17717 FIXME drow/2003-11-16: No callers check for this case any more; soon all
17718 callers will only want a very basic result and this can become a
17721 Note that stack[0] is unused except as a default error return. */
17724 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
17726 struct objfile
*objfile
= cu
->objfile
;
17728 size_t size
= blk
->size
;
17729 gdb_byte
*data
= blk
->data
;
17730 CORE_ADDR stack
[64];
17732 unsigned int bytes_read
, unsnd
;
17738 stack
[++stacki
] = 0;
17777 stack
[++stacki
] = op
- DW_OP_lit0
;
17812 stack
[++stacki
] = op
- DW_OP_reg0
;
17814 dwarf2_complex_location_expr_complaint ();
17818 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
17820 stack
[++stacki
] = unsnd
;
17822 dwarf2_complex_location_expr_complaint ();
17826 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
17831 case DW_OP_const1u
:
17832 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
17836 case DW_OP_const1s
:
17837 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
17841 case DW_OP_const2u
:
17842 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
17846 case DW_OP_const2s
:
17847 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
17851 case DW_OP_const4u
:
17852 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
17856 case DW_OP_const4s
:
17857 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
17861 case DW_OP_const8u
:
17862 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
17867 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
17873 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
17878 stack
[stacki
+ 1] = stack
[stacki
];
17883 stack
[stacki
- 1] += stack
[stacki
];
17887 case DW_OP_plus_uconst
:
17888 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
17894 stack
[stacki
- 1] -= stack
[stacki
];
17899 /* If we're not the last op, then we definitely can't encode
17900 this using GDB's address_class enum. This is valid for partial
17901 global symbols, although the variable's address will be bogus
17904 dwarf2_complex_location_expr_complaint ();
17907 case DW_OP_GNU_push_tls_address
:
17908 /* The top of the stack has the offset from the beginning
17909 of the thread control block at which the variable is located. */
17910 /* Nothing should follow this operator, so the top of stack would
17912 /* This is valid for partial global symbols, but the variable's
17913 address will be bogus in the psymtab. Make it always at least
17914 non-zero to not look as a variable garbage collected by linker
17915 which have DW_OP_addr 0. */
17917 dwarf2_complex_location_expr_complaint ();
17921 case DW_OP_GNU_uninit
:
17924 case DW_OP_GNU_addr_index
:
17925 case DW_OP_GNU_const_index
:
17926 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
17933 const char *name
= get_DW_OP_name (op
);
17936 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
17939 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
17943 return (stack
[stacki
]);
17946 /* Enforce maximum stack depth of SIZE-1 to avoid writing
17947 outside of the allocated space. Also enforce minimum>0. */
17948 if (stacki
>= ARRAY_SIZE (stack
) - 1)
17950 complaint (&symfile_complaints
,
17951 _("location description stack overflow"));
17957 complaint (&symfile_complaints
,
17958 _("location description stack underflow"));
17962 return (stack
[stacki
]);
17965 /* memory allocation interface */
17967 static struct dwarf_block
*
17968 dwarf_alloc_block (struct dwarf2_cu
*cu
)
17970 struct dwarf_block
*blk
;
17972 blk
= (struct dwarf_block
*)
17973 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
17977 static struct die_info
*
17978 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
17980 struct die_info
*die
;
17981 size_t size
= sizeof (struct die_info
);
17984 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
17986 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
17987 memset (die
, 0, sizeof (struct die_info
));
17992 /* Macro support. */
17994 /* Return the full name of file number I in *LH's file name table.
17995 Use COMP_DIR as the name of the current directory of the
17996 compilation. The result is allocated using xmalloc; the caller is
17997 responsible for freeing it. */
17999 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
18001 /* Is the file number a valid index into the line header's file name
18002 table? Remember that file numbers start with one, not zero. */
18003 if (1 <= file
&& file
<= lh
->num_file_names
)
18005 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
18007 if (IS_ABSOLUTE_PATH (fe
->name
))
18008 return xstrdup (fe
->name
);
18016 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18022 dir_len
= strlen (dir
);
18023 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
18024 strcpy (full_name
, dir
);
18025 full_name
[dir_len
] = '/';
18026 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
18030 return xstrdup (fe
->name
);
18035 /* The compiler produced a bogus file number. We can at least
18036 record the macro definitions made in the file, even if we
18037 won't be able to find the file by name. */
18038 char fake_name
[80];
18040 xsnprintf (fake_name
, sizeof (fake_name
),
18041 "<bad macro file number %d>", file
);
18043 complaint (&symfile_complaints
,
18044 _("bad file number in macro information (%d)"),
18047 return xstrdup (fake_name
);
18052 static struct macro_source_file
*
18053 macro_start_file (int file
, int line
,
18054 struct macro_source_file
*current_file
,
18055 const char *comp_dir
,
18056 struct line_header
*lh
, struct objfile
*objfile
)
18058 /* The full name of this source file. */
18059 char *full_name
= file_full_name (file
, lh
, comp_dir
);
18061 /* We don't create a macro table for this compilation unit
18062 at all until we actually get a filename. */
18063 if (! pending_macros
)
18064 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
18065 objfile
->per_bfd
->macro_cache
);
18067 if (! current_file
)
18069 /* If we have no current file, then this must be the start_file
18070 directive for the compilation unit's main source file. */
18071 current_file
= macro_set_main (pending_macros
, full_name
);
18072 macro_define_special (pending_macros
);
18075 current_file
= macro_include (current_file
, line
, full_name
);
18079 return current_file
;
18083 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
18084 followed by a null byte. */
18086 copy_string (const char *buf
, int len
)
18088 char *s
= xmalloc (len
+ 1);
18090 memcpy (s
, buf
, len
);
18096 static const char *
18097 consume_improper_spaces (const char *p
, const char *body
)
18101 complaint (&symfile_complaints
,
18102 _("macro definition contains spaces "
18103 "in formal argument list:\n`%s'"),
18115 parse_macro_definition (struct macro_source_file
*file
, int line
,
18120 /* The body string takes one of two forms. For object-like macro
18121 definitions, it should be:
18123 <macro name> " " <definition>
18125 For function-like macro definitions, it should be:
18127 <macro name> "() " <definition>
18129 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
18131 Spaces may appear only where explicitly indicated, and in the
18134 The Dwarf 2 spec says that an object-like macro's name is always
18135 followed by a space, but versions of GCC around March 2002 omit
18136 the space when the macro's definition is the empty string.
18138 The Dwarf 2 spec says that there should be no spaces between the
18139 formal arguments in a function-like macro's formal argument list,
18140 but versions of GCC around March 2002 include spaces after the
18144 /* Find the extent of the macro name. The macro name is terminated
18145 by either a space or null character (for an object-like macro) or
18146 an opening paren (for a function-like macro). */
18147 for (p
= body
; *p
; p
++)
18148 if (*p
== ' ' || *p
== '(')
18151 if (*p
== ' ' || *p
== '\0')
18153 /* It's an object-like macro. */
18154 int name_len
= p
- body
;
18155 char *name
= copy_string (body
, name_len
);
18156 const char *replacement
;
18159 replacement
= body
+ name_len
+ 1;
18162 dwarf2_macro_malformed_definition_complaint (body
);
18163 replacement
= body
+ name_len
;
18166 macro_define_object (file
, line
, name
, replacement
);
18170 else if (*p
== '(')
18172 /* It's a function-like macro. */
18173 char *name
= copy_string (body
, p
- body
);
18176 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
18180 p
= consume_improper_spaces (p
, body
);
18182 /* Parse the formal argument list. */
18183 while (*p
&& *p
!= ')')
18185 /* Find the extent of the current argument name. */
18186 const char *arg_start
= p
;
18188 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
18191 if (! *p
|| p
== arg_start
)
18192 dwarf2_macro_malformed_definition_complaint (body
);
18195 /* Make sure argv has room for the new argument. */
18196 if (argc
>= argv_size
)
18199 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
18202 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
18205 p
= consume_improper_spaces (p
, body
);
18207 /* Consume the comma, if present. */
18212 p
= consume_improper_spaces (p
, body
);
18221 /* Perfectly formed definition, no complaints. */
18222 macro_define_function (file
, line
, name
,
18223 argc
, (const char **) argv
,
18225 else if (*p
== '\0')
18227 /* Complain, but do define it. */
18228 dwarf2_macro_malformed_definition_complaint (body
);
18229 macro_define_function (file
, line
, name
,
18230 argc
, (const char **) argv
,
18234 /* Just complain. */
18235 dwarf2_macro_malformed_definition_complaint (body
);
18238 /* Just complain. */
18239 dwarf2_macro_malformed_definition_complaint (body
);
18245 for (i
= 0; i
< argc
; i
++)
18251 dwarf2_macro_malformed_definition_complaint (body
);
18254 /* Skip some bytes from BYTES according to the form given in FORM.
18255 Returns the new pointer. */
18258 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
18259 enum dwarf_form form
,
18260 unsigned int offset_size
,
18261 struct dwarf2_section_info
*section
)
18263 unsigned int bytes_read
;
18267 case DW_FORM_data1
:
18272 case DW_FORM_data2
:
18276 case DW_FORM_data4
:
18280 case DW_FORM_data8
:
18284 case DW_FORM_string
:
18285 read_direct_string (abfd
, bytes
, &bytes_read
);
18286 bytes
+= bytes_read
;
18289 case DW_FORM_sec_offset
:
18291 case DW_FORM_GNU_strp_alt
:
18292 bytes
+= offset_size
;
18295 case DW_FORM_block
:
18296 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
18297 bytes
+= bytes_read
;
18300 case DW_FORM_block1
:
18301 bytes
+= 1 + read_1_byte (abfd
, bytes
);
18303 case DW_FORM_block2
:
18304 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
18306 case DW_FORM_block4
:
18307 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
18310 case DW_FORM_sdata
:
18311 case DW_FORM_udata
:
18312 case DW_FORM_GNU_addr_index
:
18313 case DW_FORM_GNU_str_index
:
18314 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
18317 dwarf2_section_buffer_overflow_complaint (section
);
18325 complaint (&symfile_complaints
,
18326 _("invalid form 0x%x in `%s'"),
18328 section
->asection
->name
);
18336 /* A helper for dwarf_decode_macros that handles skipping an unknown
18337 opcode. Returns an updated pointer to the macro data buffer; or,
18338 on error, issues a complaint and returns NULL. */
18341 skip_unknown_opcode (unsigned int opcode
,
18342 gdb_byte
**opcode_definitions
,
18343 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18345 unsigned int offset_size
,
18346 struct dwarf2_section_info
*section
)
18348 unsigned int bytes_read
, i
;
18352 if (opcode_definitions
[opcode
] == NULL
)
18354 complaint (&symfile_complaints
,
18355 _("unrecognized DW_MACFINO opcode 0x%x"),
18360 defn
= opcode_definitions
[opcode
];
18361 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
18362 defn
+= bytes_read
;
18364 for (i
= 0; i
< arg
; ++i
)
18366 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
18368 if (mac_ptr
== NULL
)
18370 /* skip_form_bytes already issued the complaint. */
18378 /* A helper function which parses the header of a macro section.
18379 If the macro section is the extended (for now called "GNU") type,
18380 then this updates *OFFSET_SIZE. Returns a pointer to just after
18381 the header, or issues a complaint and returns NULL on error. */
18384 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
18387 unsigned int *offset_size
,
18388 int section_is_gnu
)
18390 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
18392 if (section_is_gnu
)
18394 unsigned int version
, flags
;
18396 version
= read_2_bytes (abfd
, mac_ptr
);
18399 complaint (&symfile_complaints
,
18400 _("unrecognized version `%d' in .debug_macro section"),
18406 flags
= read_1_byte (abfd
, mac_ptr
);
18408 *offset_size
= (flags
& 1) ? 8 : 4;
18410 if ((flags
& 2) != 0)
18411 /* We don't need the line table offset. */
18412 mac_ptr
+= *offset_size
;
18414 /* Vendor opcode descriptions. */
18415 if ((flags
& 4) != 0)
18417 unsigned int i
, count
;
18419 count
= read_1_byte (abfd
, mac_ptr
);
18421 for (i
= 0; i
< count
; ++i
)
18423 unsigned int opcode
, bytes_read
;
18426 opcode
= read_1_byte (abfd
, mac_ptr
);
18428 opcode_definitions
[opcode
] = mac_ptr
;
18429 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18430 mac_ptr
+= bytes_read
;
18439 /* A helper for dwarf_decode_macros that handles the GNU extensions,
18440 including DW_MACRO_GNU_transparent_include. */
18443 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
18444 struct macro_source_file
*current_file
,
18445 struct line_header
*lh
, char *comp_dir
,
18446 struct dwarf2_section_info
*section
,
18447 int section_is_gnu
, int section_is_dwz
,
18448 unsigned int offset_size
,
18449 struct objfile
*objfile
,
18450 htab_t include_hash
)
18452 enum dwarf_macro_record_type macinfo_type
;
18453 int at_commandline
;
18454 gdb_byte
*opcode_definitions
[256];
18456 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18457 &offset_size
, section_is_gnu
);
18458 if (mac_ptr
== NULL
)
18460 /* We already issued a complaint. */
18464 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
18465 GDB is still reading the definitions from command line. First
18466 DW_MACINFO_start_file will need to be ignored as it was already executed
18467 to create CURRENT_FILE for the main source holding also the command line
18468 definitions. On first met DW_MACINFO_start_file this flag is reset to
18469 normally execute all the remaining DW_MACINFO_start_file macinfos. */
18471 at_commandline
= 1;
18475 /* Do we at least have room for a macinfo type byte? */
18476 if (mac_ptr
>= mac_end
)
18478 dwarf2_section_buffer_overflow_complaint (section
);
18482 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18485 /* Note that we rely on the fact that the corresponding GNU and
18486 DWARF constants are the same. */
18487 switch (macinfo_type
)
18489 /* A zero macinfo type indicates the end of the macro
18494 case DW_MACRO_GNU_define
:
18495 case DW_MACRO_GNU_undef
:
18496 case DW_MACRO_GNU_define_indirect
:
18497 case DW_MACRO_GNU_undef_indirect
:
18498 case DW_MACRO_GNU_define_indirect_alt
:
18499 case DW_MACRO_GNU_undef_indirect_alt
:
18501 unsigned int bytes_read
;
18506 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18507 mac_ptr
+= bytes_read
;
18509 if (macinfo_type
== DW_MACRO_GNU_define
18510 || macinfo_type
== DW_MACRO_GNU_undef
)
18512 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18513 mac_ptr
+= bytes_read
;
18517 LONGEST str_offset
;
18519 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18520 mac_ptr
+= offset_size
;
18522 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
18523 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
18526 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18528 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
18531 body
= read_indirect_string_at_offset (abfd
, str_offset
);
18534 is_define
= (macinfo_type
== DW_MACRO_GNU_define
18535 || macinfo_type
== DW_MACRO_GNU_define_indirect
18536 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
18537 if (! current_file
)
18539 /* DWARF violation as no main source is present. */
18540 complaint (&symfile_complaints
,
18541 _("debug info with no main source gives macro %s "
18543 is_define
? _("definition") : _("undefinition"),
18547 if ((line
== 0 && !at_commandline
)
18548 || (line
!= 0 && at_commandline
))
18549 complaint (&symfile_complaints
,
18550 _("debug info gives %s macro %s with %s line %d: %s"),
18551 at_commandline
? _("command-line") : _("in-file"),
18552 is_define
? _("definition") : _("undefinition"),
18553 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
18556 parse_macro_definition (current_file
, line
, body
);
18559 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
18560 || macinfo_type
== DW_MACRO_GNU_undef_indirect
18561 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
18562 macro_undef (current_file
, line
, body
);
18567 case DW_MACRO_GNU_start_file
:
18569 unsigned int bytes_read
;
18572 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18573 mac_ptr
+= bytes_read
;
18574 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18575 mac_ptr
+= bytes_read
;
18577 if ((line
== 0 && !at_commandline
)
18578 || (line
!= 0 && at_commandline
))
18579 complaint (&symfile_complaints
,
18580 _("debug info gives source %d included "
18581 "from %s at %s line %d"),
18582 file
, at_commandline
? _("command-line") : _("file"),
18583 line
== 0 ? _("zero") : _("non-zero"), line
);
18585 if (at_commandline
)
18587 /* This DW_MACRO_GNU_start_file was executed in the
18589 at_commandline
= 0;
18592 current_file
= macro_start_file (file
, line
,
18593 current_file
, comp_dir
,
18598 case DW_MACRO_GNU_end_file
:
18599 if (! current_file
)
18600 complaint (&symfile_complaints
,
18601 _("macro debug info has an unmatched "
18602 "`close_file' directive"));
18605 current_file
= current_file
->included_by
;
18606 if (! current_file
)
18608 enum dwarf_macro_record_type next_type
;
18610 /* GCC circa March 2002 doesn't produce the zero
18611 type byte marking the end of the compilation
18612 unit. Complain if it's not there, but exit no
18615 /* Do we at least have room for a macinfo type byte? */
18616 if (mac_ptr
>= mac_end
)
18618 dwarf2_section_buffer_overflow_complaint (section
);
18622 /* We don't increment mac_ptr here, so this is just
18624 next_type
= read_1_byte (abfd
, mac_ptr
);
18625 if (next_type
!= 0)
18626 complaint (&symfile_complaints
,
18627 _("no terminating 0-type entry for "
18628 "macros in `.debug_macinfo' section"));
18635 case DW_MACRO_GNU_transparent_include
:
18636 case DW_MACRO_GNU_transparent_include_alt
:
18640 bfd
*include_bfd
= abfd
;
18641 struct dwarf2_section_info
*include_section
= section
;
18642 struct dwarf2_section_info alt_section
;
18643 gdb_byte
*include_mac_end
= mac_end
;
18644 int is_dwz
= section_is_dwz
;
18645 gdb_byte
*new_mac_ptr
;
18647 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
18648 mac_ptr
+= offset_size
;
18650 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
18652 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18654 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
18657 include_bfd
= dwz
->macro
.asection
->owner
;
18658 include_section
= &dwz
->macro
;
18659 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
18663 new_mac_ptr
= include_section
->buffer
+ offset
;
18664 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
18668 /* This has actually happened; see
18669 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
18670 complaint (&symfile_complaints
,
18671 _("recursive DW_MACRO_GNU_transparent_include in "
18672 ".debug_macro section"));
18676 *slot
= new_mac_ptr
;
18678 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
18679 include_mac_end
, current_file
,
18681 section
, section_is_gnu
, is_dwz
,
18682 offset_size
, objfile
, include_hash
);
18684 htab_remove_elt (include_hash
, new_mac_ptr
);
18689 case DW_MACINFO_vendor_ext
:
18690 if (!section_is_gnu
)
18692 unsigned int bytes_read
;
18695 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18696 mac_ptr
+= bytes_read
;
18697 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18698 mac_ptr
+= bytes_read
;
18700 /* We don't recognize any vendor extensions. */
18706 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18707 mac_ptr
, mac_end
, abfd
, offset_size
,
18709 if (mac_ptr
== NULL
)
18713 } while (macinfo_type
!= 0);
18717 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
18718 char *comp_dir
, int section_is_gnu
)
18720 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18721 struct line_header
*lh
= cu
->line_header
;
18723 gdb_byte
*mac_ptr
, *mac_end
;
18724 struct macro_source_file
*current_file
= 0;
18725 enum dwarf_macro_record_type macinfo_type
;
18726 unsigned int offset_size
= cu
->header
.offset_size
;
18727 gdb_byte
*opcode_definitions
[256];
18728 struct cleanup
*cleanup
;
18729 htab_t include_hash
;
18731 struct dwarf2_section_info
*section
;
18732 const char *section_name
;
18734 if (cu
->dwo_unit
!= NULL
)
18736 if (section_is_gnu
)
18738 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
18739 section_name
= ".debug_macro.dwo";
18743 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
18744 section_name
= ".debug_macinfo.dwo";
18749 if (section_is_gnu
)
18751 section
= &dwarf2_per_objfile
->macro
;
18752 section_name
= ".debug_macro";
18756 section
= &dwarf2_per_objfile
->macinfo
;
18757 section_name
= ".debug_macinfo";
18761 dwarf2_read_section (objfile
, section
);
18762 if (section
->buffer
== NULL
)
18764 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
18767 abfd
= section
->asection
->owner
;
18769 /* First pass: Find the name of the base filename.
18770 This filename is needed in order to process all macros whose definition
18771 (or undefinition) comes from the command line. These macros are defined
18772 before the first DW_MACINFO_start_file entry, and yet still need to be
18773 associated to the base file.
18775 To determine the base file name, we scan the macro definitions until we
18776 reach the first DW_MACINFO_start_file entry. We then initialize
18777 CURRENT_FILE accordingly so that any macro definition found before the
18778 first DW_MACINFO_start_file can still be associated to the base file. */
18780 mac_ptr
= section
->buffer
+ offset
;
18781 mac_end
= section
->buffer
+ section
->size
;
18783 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
18784 &offset_size
, section_is_gnu
);
18785 if (mac_ptr
== NULL
)
18787 /* We already issued a complaint. */
18793 /* Do we at least have room for a macinfo type byte? */
18794 if (mac_ptr
>= mac_end
)
18796 /* Complaint is printed during the second pass as GDB will probably
18797 stop the first pass earlier upon finding
18798 DW_MACINFO_start_file. */
18802 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
18805 /* Note that we rely on the fact that the corresponding GNU and
18806 DWARF constants are the same. */
18807 switch (macinfo_type
)
18809 /* A zero macinfo type indicates the end of the macro
18814 case DW_MACRO_GNU_define
:
18815 case DW_MACRO_GNU_undef
:
18816 /* Only skip the data by MAC_PTR. */
18818 unsigned int bytes_read
;
18820 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18821 mac_ptr
+= bytes_read
;
18822 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18823 mac_ptr
+= bytes_read
;
18827 case DW_MACRO_GNU_start_file
:
18829 unsigned int bytes_read
;
18832 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18833 mac_ptr
+= bytes_read
;
18834 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18835 mac_ptr
+= bytes_read
;
18837 current_file
= macro_start_file (file
, line
, current_file
,
18838 comp_dir
, lh
, objfile
);
18842 case DW_MACRO_GNU_end_file
:
18843 /* No data to skip by MAC_PTR. */
18846 case DW_MACRO_GNU_define_indirect
:
18847 case DW_MACRO_GNU_undef_indirect
:
18848 case DW_MACRO_GNU_define_indirect_alt
:
18849 case DW_MACRO_GNU_undef_indirect_alt
:
18851 unsigned int bytes_read
;
18853 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18854 mac_ptr
+= bytes_read
;
18855 mac_ptr
+= offset_size
;
18859 case DW_MACRO_GNU_transparent_include
:
18860 case DW_MACRO_GNU_transparent_include_alt
:
18861 /* Note that, according to the spec, a transparent include
18862 chain cannot call DW_MACRO_GNU_start_file. So, we can just
18863 skip this opcode. */
18864 mac_ptr
+= offset_size
;
18867 case DW_MACINFO_vendor_ext
:
18868 /* Only skip the data by MAC_PTR. */
18869 if (!section_is_gnu
)
18871 unsigned int bytes_read
;
18873 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
18874 mac_ptr
+= bytes_read
;
18875 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
18876 mac_ptr
+= bytes_read
;
18881 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
18882 mac_ptr
, mac_end
, abfd
, offset_size
,
18884 if (mac_ptr
== NULL
)
18888 } while (macinfo_type
!= 0 && current_file
== NULL
);
18890 /* Second pass: Process all entries.
18892 Use the AT_COMMAND_LINE flag to determine whether we are still processing
18893 command-line macro definitions/undefinitions. This flag is unset when we
18894 reach the first DW_MACINFO_start_file entry. */
18896 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
18897 NULL
, xcalloc
, xfree
);
18898 cleanup
= make_cleanup_htab_delete (include_hash
);
18899 mac_ptr
= section
->buffer
+ offset
;
18900 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
18902 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
18903 current_file
, lh
, comp_dir
, section
,
18905 offset_size
, objfile
, include_hash
);
18906 do_cleanups (cleanup
);
18909 /* Check if the attribute's form is a DW_FORM_block*
18910 if so return true else false. */
18913 attr_form_is_block (struct attribute
*attr
)
18915 return (attr
== NULL
? 0 :
18916 attr
->form
== DW_FORM_block1
18917 || attr
->form
== DW_FORM_block2
18918 || attr
->form
== DW_FORM_block4
18919 || attr
->form
== DW_FORM_block
18920 || attr
->form
== DW_FORM_exprloc
);
18923 /* Return non-zero if ATTR's value is a section offset --- classes
18924 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
18925 You may use DW_UNSND (attr) to retrieve such offsets.
18927 Section 7.5.4, "Attribute Encodings", explains that no attribute
18928 may have a value that belongs to more than one of these classes; it
18929 would be ambiguous if we did, because we use the same forms for all
18933 attr_form_is_section_offset (struct attribute
*attr
)
18935 return (attr
->form
== DW_FORM_data4
18936 || attr
->form
== DW_FORM_data8
18937 || attr
->form
== DW_FORM_sec_offset
);
18940 /* Return non-zero if ATTR's value falls in the 'constant' class, or
18941 zero otherwise. When this function returns true, you can apply
18942 dwarf2_get_attr_constant_value to it.
18944 However, note that for some attributes you must check
18945 attr_form_is_section_offset before using this test. DW_FORM_data4
18946 and DW_FORM_data8 are members of both the constant class, and of
18947 the classes that contain offsets into other debug sections
18948 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
18949 that, if an attribute's can be either a constant or one of the
18950 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
18951 taken as section offsets, not constants. */
18954 attr_form_is_constant (struct attribute
*attr
)
18956 switch (attr
->form
)
18958 case DW_FORM_sdata
:
18959 case DW_FORM_udata
:
18960 case DW_FORM_data1
:
18961 case DW_FORM_data2
:
18962 case DW_FORM_data4
:
18963 case DW_FORM_data8
:
18970 /* Return the .debug_loc section to use for CU.
18971 For DWO files use .debug_loc.dwo. */
18973 static struct dwarf2_section_info
*
18974 cu_debug_loc_section (struct dwarf2_cu
*cu
)
18977 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
18978 return &dwarf2_per_objfile
->loc
;
18981 /* A helper function that fills in a dwarf2_loclist_baton. */
18984 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
18985 struct dwarf2_loclist_baton
*baton
,
18986 struct attribute
*attr
)
18988 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18990 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18992 baton
->per_cu
= cu
->per_cu
;
18993 gdb_assert (baton
->per_cu
);
18994 /* We don't know how long the location list is, but make sure we
18995 don't run off the edge of the section. */
18996 baton
->size
= section
->size
- DW_UNSND (attr
);
18997 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
18998 baton
->base_address
= cu
->base_address
;
18999 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
19003 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
19004 struct dwarf2_cu
*cu
)
19006 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19007 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19009 if (attr_form_is_section_offset (attr
)
19010 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
19011 the section. If so, fall through to the complaint in the
19013 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
19015 struct dwarf2_loclist_baton
*baton
;
19017 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19018 sizeof (struct dwarf2_loclist_baton
));
19020 fill_in_loclist_baton (cu
, baton
, attr
);
19022 if (cu
->base_known
== 0)
19023 complaint (&symfile_complaints
,
19024 _("Location list used without "
19025 "specifying the CU base address."));
19027 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
19028 SYMBOL_LOCATION_BATON (sym
) = baton
;
19032 struct dwarf2_locexpr_baton
*baton
;
19034 baton
= obstack_alloc (&objfile
->objfile_obstack
,
19035 sizeof (struct dwarf2_locexpr_baton
));
19036 baton
->per_cu
= cu
->per_cu
;
19037 gdb_assert (baton
->per_cu
);
19039 if (attr_form_is_block (attr
))
19041 /* Note that we're just copying the block's data pointer
19042 here, not the actual data. We're still pointing into the
19043 info_buffer for SYM's objfile; right now we never release
19044 that buffer, but when we do clean up properly this may
19046 baton
->size
= DW_BLOCK (attr
)->size
;
19047 baton
->data
= DW_BLOCK (attr
)->data
;
19051 dwarf2_invalid_attrib_class_complaint ("location description",
19052 SYMBOL_NATURAL_NAME (sym
));
19056 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
19057 SYMBOL_LOCATION_BATON (sym
) = baton
;
19061 /* Return the OBJFILE associated with the compilation unit CU. If CU
19062 came from a separate debuginfo file, then the master objfile is
19066 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
19068 struct objfile
*objfile
= per_cu
->objfile
;
19070 /* Return the master objfile, so that we can report and look up the
19071 correct file containing this variable. */
19072 if (objfile
->separate_debug_objfile_backlink
)
19073 objfile
= objfile
->separate_debug_objfile_backlink
;
19078 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
19079 (CU_HEADERP is unused in such case) or prepare a temporary copy at
19080 CU_HEADERP first. */
19082 static const struct comp_unit_head
*
19083 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
19084 struct dwarf2_per_cu_data
*per_cu
)
19086 gdb_byte
*info_ptr
;
19089 return &per_cu
->cu
->header
;
19091 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
19093 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
19094 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
19099 /* Return the address size given in the compilation unit header for CU. */
19102 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19104 struct comp_unit_head cu_header_local
;
19105 const struct comp_unit_head
*cu_headerp
;
19107 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19109 return cu_headerp
->addr_size
;
19112 /* Return the offset size given in the compilation unit header for CU. */
19115 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
19117 struct comp_unit_head cu_header_local
;
19118 const struct comp_unit_head
*cu_headerp
;
19120 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19122 return cu_headerp
->offset_size
;
19125 /* See its dwarf2loc.h declaration. */
19128 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
19130 struct comp_unit_head cu_header_local
;
19131 const struct comp_unit_head
*cu_headerp
;
19133 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
19135 if (cu_headerp
->version
== 2)
19136 return cu_headerp
->addr_size
;
19138 return cu_headerp
->offset_size
;
19141 /* Return the text offset of the CU. The returned offset comes from
19142 this CU's objfile. If this objfile came from a separate debuginfo
19143 file, then the offset may be different from the corresponding
19144 offset in the parent objfile. */
19147 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
19149 struct objfile
*objfile
= per_cu
->objfile
;
19151 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19154 /* Locate the .debug_info compilation unit from CU's objfile which contains
19155 the DIE at OFFSET. Raises an error on failure. */
19157 static struct dwarf2_per_cu_data
*
19158 dwarf2_find_containing_comp_unit (sect_offset offset
,
19159 unsigned int offset_in_dwz
,
19160 struct objfile
*objfile
)
19162 struct dwarf2_per_cu_data
*this_cu
;
19164 const sect_offset
*cu_off
;
19167 high
= dwarf2_per_objfile
->n_comp_units
- 1;
19170 struct dwarf2_per_cu_data
*mid_cu
;
19171 int mid
= low
+ (high
- low
) / 2;
19173 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
19174 cu_off
= &mid_cu
->offset
;
19175 if (mid_cu
->is_dwz
> offset_in_dwz
19176 || (mid_cu
->is_dwz
== offset_in_dwz
19177 && cu_off
->sect_off
>= offset
.sect_off
))
19182 gdb_assert (low
== high
);
19183 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19184 cu_off
= &this_cu
->offset
;
19185 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
19187 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
19188 error (_("Dwarf Error: could not find partial DIE containing "
19189 "offset 0x%lx [in module %s]"),
19190 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
19192 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
19193 <= offset
.sect_off
);
19194 return dwarf2_per_objfile
->all_comp_units
[low
-1];
19198 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
19199 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
19200 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
19201 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
19202 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
19207 /* Initialize dwarf2_cu CU, owned by PER_CU. */
19210 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
19212 memset (cu
, 0, sizeof (*cu
));
19214 cu
->per_cu
= per_cu
;
19215 cu
->objfile
= per_cu
->objfile
;
19216 obstack_init (&cu
->comp_unit_obstack
);
19219 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
19222 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
19223 enum language pretend_language
)
19225 struct attribute
*attr
;
19227 /* Set the language we're debugging. */
19228 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
19230 set_cu_language (DW_UNSND (attr
), cu
);
19233 cu
->language
= pretend_language
;
19234 cu
->language_defn
= language_def (cu
->language
);
19237 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
19239 cu
->producer
= DW_STRING (attr
);
19242 /* Release one cached compilation unit, CU. We unlink it from the tree
19243 of compilation units, but we don't remove it from the read_in_chain;
19244 the caller is responsible for that.
19245 NOTE: DATA is a void * because this function is also used as a
19246 cleanup routine. */
19249 free_heap_comp_unit (void *data
)
19251 struct dwarf2_cu
*cu
= data
;
19253 gdb_assert (cu
->per_cu
!= NULL
);
19254 cu
->per_cu
->cu
= NULL
;
19257 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19262 /* This cleanup function is passed the address of a dwarf2_cu on the stack
19263 when we're finished with it. We can't free the pointer itself, but be
19264 sure to unlink it from the cache. Also release any associated storage. */
19267 free_stack_comp_unit (void *data
)
19269 struct dwarf2_cu
*cu
= data
;
19271 gdb_assert (cu
->per_cu
!= NULL
);
19272 cu
->per_cu
->cu
= NULL
;
19275 obstack_free (&cu
->comp_unit_obstack
, NULL
);
19276 cu
->partial_dies
= NULL
;
19279 /* Free all cached compilation units. */
19282 free_cached_comp_units (void *data
)
19284 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19286 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19287 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19288 while (per_cu
!= NULL
)
19290 struct dwarf2_per_cu_data
*next_cu
;
19292 next_cu
= per_cu
->cu
->read_in_chain
;
19294 free_heap_comp_unit (per_cu
->cu
);
19295 *last_chain
= next_cu
;
19301 /* Increase the age counter on each cached compilation unit, and free
19302 any that are too old. */
19305 age_cached_comp_units (void)
19307 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19309 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
19310 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19311 while (per_cu
!= NULL
)
19313 per_cu
->cu
->last_used
++;
19314 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
19315 dwarf2_mark (per_cu
->cu
);
19316 per_cu
= per_cu
->cu
->read_in_chain
;
19319 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19320 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19321 while (per_cu
!= NULL
)
19323 struct dwarf2_per_cu_data
*next_cu
;
19325 next_cu
= per_cu
->cu
->read_in_chain
;
19327 if (!per_cu
->cu
->mark
)
19329 free_heap_comp_unit (per_cu
->cu
);
19330 *last_chain
= next_cu
;
19333 last_chain
= &per_cu
->cu
->read_in_chain
;
19339 /* Remove a single compilation unit from the cache. */
19342 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
19344 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
19346 per_cu
= dwarf2_per_objfile
->read_in_chain
;
19347 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
19348 while (per_cu
!= NULL
)
19350 struct dwarf2_per_cu_data
*next_cu
;
19352 next_cu
= per_cu
->cu
->read_in_chain
;
19354 if (per_cu
== target_per_cu
)
19356 free_heap_comp_unit (per_cu
->cu
);
19358 *last_chain
= next_cu
;
19362 last_chain
= &per_cu
->cu
->read_in_chain
;
19368 /* Release all extra memory associated with OBJFILE. */
19371 dwarf2_free_objfile (struct objfile
*objfile
)
19373 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19375 if (dwarf2_per_objfile
== NULL
)
19378 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
19379 free_cached_comp_units (NULL
);
19381 if (dwarf2_per_objfile
->quick_file_names_table
)
19382 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
19384 /* Everything else should be on the objfile obstack. */
19387 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
19388 We store these in a hash table separate from the DIEs, and preserve them
19389 when the DIEs are flushed out of cache.
19391 The CU "per_cu" pointer is needed because offset alone is not enough to
19392 uniquely identify the type. A file may have multiple .debug_types sections,
19393 or the type may come from a DWO file. We have to use something in
19394 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
19395 routine, get_die_type_at_offset, from outside this file, and thus won't
19396 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
19399 struct dwarf2_per_cu_offset_and_type
19401 const struct dwarf2_per_cu_data
*per_cu
;
19402 sect_offset offset
;
19406 /* Hash function for a dwarf2_per_cu_offset_and_type. */
19409 per_cu_offset_and_type_hash (const void *item
)
19411 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
19413 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
19416 /* Equality function for a dwarf2_per_cu_offset_and_type. */
19419 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
19421 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
19422 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
19424 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
19425 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
19428 /* Set the type associated with DIE to TYPE. Save it in CU's hash
19429 table if necessary. For convenience, return TYPE.
19431 The DIEs reading must have careful ordering to:
19432 * Not cause infite loops trying to read in DIEs as a prerequisite for
19433 reading current DIE.
19434 * Not trying to dereference contents of still incompletely read in types
19435 while reading in other DIEs.
19436 * Enable referencing still incompletely read in types just by a pointer to
19437 the type without accessing its fields.
19439 Therefore caller should follow these rules:
19440 * Try to fetch any prerequisite types we may need to build this DIE type
19441 before building the type and calling set_die_type.
19442 * After building type call set_die_type for current DIE as soon as
19443 possible before fetching more types to complete the current type.
19444 * Make the type as complete as possible before fetching more types. */
19446 static struct type
*
19447 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19449 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
19450 struct objfile
*objfile
= cu
->objfile
;
19452 /* For Ada types, make sure that the gnat-specific data is always
19453 initialized (if not already set). There are a few types where
19454 we should not be doing so, because the type-specific area is
19455 already used to hold some other piece of info (eg: TYPE_CODE_FLT
19456 where the type-specific area is used to store the floatformat).
19457 But this is not a problem, because the gnat-specific information
19458 is actually not needed for these types. */
19459 if (need_gnat_info (cu
)
19460 && TYPE_CODE (type
) != TYPE_CODE_FUNC
19461 && TYPE_CODE (type
) != TYPE_CODE_FLT
19462 && !HAVE_GNAT_AUX_INFO (type
))
19463 INIT_GNAT_SPECIFIC (type
);
19465 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19467 dwarf2_per_objfile
->die_type_hash
=
19468 htab_create_alloc_ex (127,
19469 per_cu_offset_and_type_hash
,
19470 per_cu_offset_and_type_eq
,
19472 &objfile
->objfile_obstack
,
19473 hashtab_obstack_allocate
,
19474 dummy_obstack_deallocate
);
19477 ofs
.per_cu
= cu
->per_cu
;
19478 ofs
.offset
= die
->offset
;
19480 slot
= (struct dwarf2_per_cu_offset_and_type
**)
19481 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
19483 complaint (&symfile_complaints
,
19484 _("A problem internal to GDB: DIE 0x%x has type already set"),
19485 die
->offset
.sect_off
);
19486 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
19491 /* Look up the type for the die at OFFSET in the appropriate type_hash
19492 table, or return NULL if the die does not have a saved type. */
19494 static struct type
*
19495 get_die_type_at_offset (sect_offset offset
,
19496 struct dwarf2_per_cu_data
*per_cu
)
19498 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
19500 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
19503 ofs
.per_cu
= per_cu
;
19504 ofs
.offset
= offset
;
19505 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
19512 /* Look up the type for DIE in the appropriate type_hash table,
19513 or return NULL if DIE does not have a saved type. */
19515 static struct type
*
19516 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19518 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
19521 /* Add a dependence relationship from CU to REF_PER_CU. */
19524 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
19525 struct dwarf2_per_cu_data
*ref_per_cu
)
19529 if (cu
->dependencies
== NULL
)
19531 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
19532 NULL
, &cu
->comp_unit_obstack
,
19533 hashtab_obstack_allocate
,
19534 dummy_obstack_deallocate
);
19536 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
19538 *slot
= ref_per_cu
;
19541 /* Subroutine of dwarf2_mark to pass to htab_traverse.
19542 Set the mark field in every compilation unit in the
19543 cache that we must keep because we are keeping CU. */
19546 dwarf2_mark_helper (void **slot
, void *data
)
19548 struct dwarf2_per_cu_data
*per_cu
;
19550 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
19552 /* cu->dependencies references may not yet have been ever read if QUIT aborts
19553 reading of the chain. As such dependencies remain valid it is not much
19554 useful to track and undo them during QUIT cleanups. */
19555 if (per_cu
->cu
== NULL
)
19558 if (per_cu
->cu
->mark
)
19560 per_cu
->cu
->mark
= 1;
19562 if (per_cu
->cu
->dependencies
!= NULL
)
19563 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19568 /* Set the mark field in CU and in every other compilation unit in the
19569 cache that we must keep because we are keeping CU. */
19572 dwarf2_mark (struct dwarf2_cu
*cu
)
19577 if (cu
->dependencies
!= NULL
)
19578 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
19582 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
19586 per_cu
->cu
->mark
= 0;
19587 per_cu
= per_cu
->cu
->read_in_chain
;
19591 /* Trivial hash function for partial_die_info: the hash value of a DIE
19592 is its offset in .debug_info for this objfile. */
19595 partial_die_hash (const void *item
)
19597 const struct partial_die_info
*part_die
= item
;
19599 return part_die
->offset
.sect_off
;
19602 /* Trivial comparison function for partial_die_info structures: two DIEs
19603 are equal if they have the same offset. */
19606 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
19608 const struct partial_die_info
*part_die_lhs
= item_lhs
;
19609 const struct partial_die_info
*part_die_rhs
= item_rhs
;
19611 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
19614 static struct cmd_list_element
*set_dwarf2_cmdlist
;
19615 static struct cmd_list_element
*show_dwarf2_cmdlist
;
19618 set_dwarf2_cmd (char *args
, int from_tty
)
19620 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
19624 show_dwarf2_cmd (char *args
, int from_tty
)
19626 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
19629 /* Free data associated with OBJFILE, if necessary. */
19632 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
19634 struct dwarf2_per_objfile
*data
= d
;
19637 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
19638 VEC_free (dwarf2_per_cu_ptr
,
19639 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
19641 VEC_free (dwarf2_section_info_def
, data
->types
);
19643 if (data
->dwo_files
)
19644 free_dwo_files (data
->dwo_files
, objfile
);
19646 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
19647 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
19651 /* The "save gdb-index" command. */
19653 /* The contents of the hash table we create when building the string
19655 struct strtab_entry
19657 offset_type offset
;
19661 /* Hash function for a strtab_entry.
19663 Function is used only during write_hash_table so no index format backward
19664 compatibility is needed. */
19667 hash_strtab_entry (const void *e
)
19669 const struct strtab_entry
*entry
= e
;
19670 return mapped_index_string_hash (INT_MAX
, entry
->str
);
19673 /* Equality function for a strtab_entry. */
19676 eq_strtab_entry (const void *a
, const void *b
)
19678 const struct strtab_entry
*ea
= a
;
19679 const struct strtab_entry
*eb
= b
;
19680 return !strcmp (ea
->str
, eb
->str
);
19683 /* Create a strtab_entry hash table. */
19686 create_strtab (void)
19688 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
19689 xfree
, xcalloc
, xfree
);
19692 /* Add a string to the constant pool. Return the string's offset in
19696 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
19699 struct strtab_entry entry
;
19700 struct strtab_entry
*result
;
19703 slot
= htab_find_slot (table
, &entry
, INSERT
);
19708 result
= XNEW (struct strtab_entry
);
19709 result
->offset
= obstack_object_size (cpool
);
19711 obstack_grow_str0 (cpool
, str
);
19714 return result
->offset
;
19717 /* An entry in the symbol table. */
19718 struct symtab_index_entry
19720 /* The name of the symbol. */
19722 /* The offset of the name in the constant pool. */
19723 offset_type index_offset
;
19724 /* A sorted vector of the indices of all the CUs that hold an object
19726 VEC (offset_type
) *cu_indices
;
19729 /* The symbol table. This is a power-of-2-sized hash table. */
19730 struct mapped_symtab
19732 offset_type n_elements
;
19734 struct symtab_index_entry
**data
;
19737 /* Hash function for a symtab_index_entry. */
19740 hash_symtab_entry (const void *e
)
19742 const struct symtab_index_entry
*entry
= e
;
19743 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
19744 sizeof (offset_type
) * VEC_length (offset_type
,
19745 entry
->cu_indices
),
19749 /* Equality function for a symtab_index_entry. */
19752 eq_symtab_entry (const void *a
, const void *b
)
19754 const struct symtab_index_entry
*ea
= a
;
19755 const struct symtab_index_entry
*eb
= b
;
19756 int len
= VEC_length (offset_type
, ea
->cu_indices
);
19757 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
19759 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
19760 VEC_address (offset_type
, eb
->cu_indices
),
19761 sizeof (offset_type
) * len
);
19764 /* Destroy a symtab_index_entry. */
19767 delete_symtab_entry (void *p
)
19769 struct symtab_index_entry
*entry
= p
;
19770 VEC_free (offset_type
, entry
->cu_indices
);
19774 /* Create a hash table holding symtab_index_entry objects. */
19777 create_symbol_hash_table (void)
19779 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
19780 delete_symtab_entry
, xcalloc
, xfree
);
19783 /* Create a new mapped symtab object. */
19785 static struct mapped_symtab
*
19786 create_mapped_symtab (void)
19788 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
19789 symtab
->n_elements
= 0;
19790 symtab
->size
= 1024;
19791 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19795 /* Destroy a mapped_symtab. */
19798 cleanup_mapped_symtab (void *p
)
19800 struct mapped_symtab
*symtab
= p
;
19801 /* The contents of the array are freed when the other hash table is
19803 xfree (symtab
->data
);
19807 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
19810 Function is used only during write_hash_table so no index format backward
19811 compatibility is needed. */
19813 static struct symtab_index_entry
**
19814 find_slot (struct mapped_symtab
*symtab
, const char *name
)
19816 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
19818 index
= hash
& (symtab
->size
- 1);
19819 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
19823 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
19824 return &symtab
->data
[index
];
19825 index
= (index
+ step
) & (symtab
->size
- 1);
19829 /* Expand SYMTAB's hash table. */
19832 hash_expand (struct mapped_symtab
*symtab
)
19834 offset_type old_size
= symtab
->size
;
19836 struct symtab_index_entry
**old_entries
= symtab
->data
;
19839 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
19841 for (i
= 0; i
< old_size
; ++i
)
19843 if (old_entries
[i
])
19845 struct symtab_index_entry
**slot
= find_slot (symtab
,
19846 old_entries
[i
]->name
);
19847 *slot
= old_entries
[i
];
19851 xfree (old_entries
);
19854 /* Add an entry to SYMTAB. NAME is the name of the symbol.
19855 CU_INDEX is the index of the CU in which the symbol appears.
19856 IS_STATIC is one if the symbol is static, otherwise zero (global). */
19859 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
19860 int is_static
, gdb_index_symbol_kind kind
,
19861 offset_type cu_index
)
19863 struct symtab_index_entry
**slot
;
19864 offset_type cu_index_and_attrs
;
19866 ++symtab
->n_elements
;
19867 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
19868 hash_expand (symtab
);
19870 slot
= find_slot (symtab
, name
);
19873 *slot
= XNEW (struct symtab_index_entry
);
19874 (*slot
)->name
= name
;
19875 /* index_offset is set later. */
19876 (*slot
)->cu_indices
= NULL
;
19879 cu_index_and_attrs
= 0;
19880 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
19881 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
19882 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
19884 /* We don't want to record an index value twice as we want to avoid the
19886 We process all global symbols and then all static symbols
19887 (which would allow us to avoid the duplication by only having to check
19888 the last entry pushed), but a symbol could have multiple kinds in one CU.
19889 To keep things simple we don't worry about the duplication here and
19890 sort and uniqufy the list after we've processed all symbols. */
19891 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
19894 /* qsort helper routine for uniquify_cu_indices. */
19897 offset_type_compare (const void *ap
, const void *bp
)
19899 offset_type a
= *(offset_type
*) ap
;
19900 offset_type b
= *(offset_type
*) bp
;
19902 return (a
> b
) - (b
> a
);
19905 /* Sort and remove duplicates of all symbols' cu_indices lists. */
19908 uniquify_cu_indices (struct mapped_symtab
*symtab
)
19912 for (i
= 0; i
< symtab
->size
; ++i
)
19914 struct symtab_index_entry
*entry
= symtab
->data
[i
];
19917 && entry
->cu_indices
!= NULL
)
19919 unsigned int next_to_insert
, next_to_check
;
19920 offset_type last_value
;
19922 qsort (VEC_address (offset_type
, entry
->cu_indices
),
19923 VEC_length (offset_type
, entry
->cu_indices
),
19924 sizeof (offset_type
), offset_type_compare
);
19926 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
19927 next_to_insert
= 1;
19928 for (next_to_check
= 1;
19929 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
19932 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
19935 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
19937 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
19942 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
19947 /* Add a vector of indices to the constant pool. */
19950 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
19951 struct symtab_index_entry
*entry
)
19955 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
19958 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
19959 offset_type val
= MAYBE_SWAP (len
);
19964 entry
->index_offset
= obstack_object_size (cpool
);
19966 obstack_grow (cpool
, &val
, sizeof (val
));
19968 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
19971 val
= MAYBE_SWAP (iter
);
19972 obstack_grow (cpool
, &val
, sizeof (val
));
19977 struct symtab_index_entry
*old_entry
= *slot
;
19978 entry
->index_offset
= old_entry
->index_offset
;
19981 return entry
->index_offset
;
19984 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
19985 constant pool entries going into the obstack CPOOL. */
19988 write_hash_table (struct mapped_symtab
*symtab
,
19989 struct obstack
*output
, struct obstack
*cpool
)
19992 htab_t symbol_hash_table
;
19995 symbol_hash_table
= create_symbol_hash_table ();
19996 str_table
= create_strtab ();
19998 /* We add all the index vectors to the constant pool first, to
19999 ensure alignment is ok. */
20000 for (i
= 0; i
< symtab
->size
; ++i
)
20002 if (symtab
->data
[i
])
20003 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
20006 /* Now write out the hash table. */
20007 for (i
= 0; i
< symtab
->size
; ++i
)
20009 offset_type str_off
, vec_off
;
20011 if (symtab
->data
[i
])
20013 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
20014 vec_off
= symtab
->data
[i
]->index_offset
;
20018 /* While 0 is a valid constant pool index, it is not valid
20019 to have 0 for both offsets. */
20024 str_off
= MAYBE_SWAP (str_off
);
20025 vec_off
= MAYBE_SWAP (vec_off
);
20027 obstack_grow (output
, &str_off
, sizeof (str_off
));
20028 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
20031 htab_delete (str_table
);
20032 htab_delete (symbol_hash_table
);
20035 /* Struct to map psymtab to CU index in the index file. */
20036 struct psymtab_cu_index_map
20038 struct partial_symtab
*psymtab
;
20039 unsigned int cu_index
;
20043 hash_psymtab_cu_index (const void *item
)
20045 const struct psymtab_cu_index_map
*map
= item
;
20047 return htab_hash_pointer (map
->psymtab
);
20051 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
20053 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
20054 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
20056 return lhs
->psymtab
== rhs
->psymtab
;
20059 /* Helper struct for building the address table. */
20060 struct addrmap_index_data
20062 struct objfile
*objfile
;
20063 struct obstack
*addr_obstack
;
20064 htab_t cu_index_htab
;
20066 /* Non-zero if the previous_* fields are valid.
20067 We can't write an entry until we see the next entry (since it is only then
20068 that we know the end of the entry). */
20069 int previous_valid
;
20070 /* Index of the CU in the table of all CUs in the index file. */
20071 unsigned int previous_cu_index
;
20072 /* Start address of the CU. */
20073 CORE_ADDR previous_cu_start
;
20076 /* Write an address entry to OBSTACK. */
20079 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
20080 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
20082 offset_type cu_index_to_write
;
20084 CORE_ADDR baseaddr
;
20086 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20088 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
20089 obstack_grow (obstack
, addr
, 8);
20090 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
20091 obstack_grow (obstack
, addr
, 8);
20092 cu_index_to_write
= MAYBE_SWAP (cu_index
);
20093 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
20096 /* Worker function for traversing an addrmap to build the address table. */
20099 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
20101 struct addrmap_index_data
*data
= datap
;
20102 struct partial_symtab
*pst
= obj
;
20104 if (data
->previous_valid
)
20105 add_address_entry (data
->objfile
, data
->addr_obstack
,
20106 data
->previous_cu_start
, start_addr
,
20107 data
->previous_cu_index
);
20109 data
->previous_cu_start
= start_addr
;
20112 struct psymtab_cu_index_map find_map
, *map
;
20113 find_map
.psymtab
= pst
;
20114 map
= htab_find (data
->cu_index_htab
, &find_map
);
20115 gdb_assert (map
!= NULL
);
20116 data
->previous_cu_index
= map
->cu_index
;
20117 data
->previous_valid
= 1;
20120 data
->previous_valid
= 0;
20125 /* Write OBJFILE's address map to OBSTACK.
20126 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
20127 in the index file. */
20130 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
20131 htab_t cu_index_htab
)
20133 struct addrmap_index_data addrmap_index_data
;
20135 /* When writing the address table, we have to cope with the fact that
20136 the addrmap iterator only provides the start of a region; we have to
20137 wait until the next invocation to get the start of the next region. */
20139 addrmap_index_data
.objfile
= objfile
;
20140 addrmap_index_data
.addr_obstack
= obstack
;
20141 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
20142 addrmap_index_data
.previous_valid
= 0;
20144 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
20145 &addrmap_index_data
);
20147 /* It's highly unlikely the last entry (end address = 0xff...ff)
20148 is valid, but we should still handle it.
20149 The end address is recorded as the start of the next region, but that
20150 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
20152 if (addrmap_index_data
.previous_valid
)
20153 add_address_entry (objfile
, obstack
,
20154 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
20155 addrmap_index_data
.previous_cu_index
);
20158 /* Return the symbol kind of PSYM. */
20160 static gdb_index_symbol_kind
20161 symbol_kind (struct partial_symbol
*psym
)
20163 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
20164 enum address_class aclass
= PSYMBOL_CLASS (psym
);
20172 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
20174 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20176 case LOC_CONST_BYTES
:
20177 case LOC_OPTIMIZED_OUT
:
20179 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20181 /* Note: It's currently impossible to recognize psyms as enum values
20182 short of reading the type info. For now punt. */
20183 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
20185 /* There are other LOC_FOO values that one might want to classify
20186 as variables, but dwarf2read.c doesn't currently use them. */
20187 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20189 case STRUCT_DOMAIN
:
20190 return GDB_INDEX_SYMBOL_KIND_TYPE
;
20192 return GDB_INDEX_SYMBOL_KIND_OTHER
;
20196 /* Add a list of partial symbols to SYMTAB. */
20199 write_psymbols (struct mapped_symtab
*symtab
,
20201 struct partial_symbol
**psymp
,
20203 offset_type cu_index
,
20206 for (; count
-- > 0; ++psymp
)
20208 struct partial_symbol
*psym
= *psymp
;
20211 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
20212 error (_("Ada is not currently supported by the index"));
20214 /* Only add a given psymbol once. */
20215 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
20218 gdb_index_symbol_kind kind
= symbol_kind (psym
);
20221 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
20222 is_static
, kind
, cu_index
);
20227 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
20228 exception if there is an error. */
20231 write_obstack (FILE *file
, struct obstack
*obstack
)
20233 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
20235 != obstack_object_size (obstack
))
20236 error (_("couldn't data write to file"));
20239 /* Unlink a file if the argument is not NULL. */
20242 unlink_if_set (void *p
)
20244 char **filename
= p
;
20246 unlink (*filename
);
20249 /* A helper struct used when iterating over debug_types. */
20250 struct signatured_type_index_data
20252 struct objfile
*objfile
;
20253 struct mapped_symtab
*symtab
;
20254 struct obstack
*types_list
;
20259 /* A helper function that writes a single signatured_type to an
20263 write_one_signatured_type (void **slot
, void *d
)
20265 struct signatured_type_index_data
*info
= d
;
20266 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
20267 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
20268 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20271 write_psymbols (info
->symtab
,
20273 info
->objfile
->global_psymbols
.list
20274 + psymtab
->globals_offset
,
20275 psymtab
->n_global_syms
, info
->cu_index
,
20277 write_psymbols (info
->symtab
,
20279 info
->objfile
->static_psymbols
.list
20280 + psymtab
->statics_offset
,
20281 psymtab
->n_static_syms
, info
->cu_index
,
20284 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20285 entry
->per_cu
.offset
.sect_off
);
20286 obstack_grow (info
->types_list
, val
, 8);
20287 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20288 entry
->type_offset_in_tu
.cu_off
);
20289 obstack_grow (info
->types_list
, val
, 8);
20290 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
20291 obstack_grow (info
->types_list
, val
, 8);
20298 /* Recurse into all "included" dependencies and write their symbols as
20299 if they appeared in this psymtab. */
20302 recursively_write_psymbols (struct objfile
*objfile
,
20303 struct partial_symtab
*psymtab
,
20304 struct mapped_symtab
*symtab
,
20306 offset_type cu_index
)
20310 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
20311 if (psymtab
->dependencies
[i
]->user
!= NULL
)
20312 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
20313 symtab
, psyms_seen
, cu_index
);
20315 write_psymbols (symtab
,
20317 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
20318 psymtab
->n_global_syms
, cu_index
,
20320 write_psymbols (symtab
,
20322 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
20323 psymtab
->n_static_syms
, cu_index
,
20327 /* Create an index file for OBJFILE in the directory DIR. */
20330 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
20332 struct cleanup
*cleanup
;
20333 char *filename
, *cleanup_filename
;
20334 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
20335 struct obstack cu_list
, types_cu_list
;
20338 struct mapped_symtab
*symtab
;
20339 offset_type val
, size_of_contents
, total_len
;
20342 htab_t cu_index_htab
;
20343 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
20345 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
20348 if (dwarf2_per_objfile
->using_index
)
20349 error (_("Cannot use an index to create the index"));
20351 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
20352 error (_("Cannot make an index when the file has multiple .debug_types sections"));
20354 if (stat (objfile
->name
, &st
) < 0)
20355 perror_with_name (objfile
->name
);
20357 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
20358 INDEX_SUFFIX
, (char *) NULL
);
20359 cleanup
= make_cleanup (xfree
, filename
);
20361 out_file
= fopen (filename
, "wb");
20363 error (_("Can't open `%s' for writing"), filename
);
20365 cleanup_filename
= filename
;
20366 make_cleanup (unlink_if_set
, &cleanup_filename
);
20368 symtab
= create_mapped_symtab ();
20369 make_cleanup (cleanup_mapped_symtab
, symtab
);
20371 obstack_init (&addr_obstack
);
20372 make_cleanup_obstack_free (&addr_obstack
);
20374 obstack_init (&cu_list
);
20375 make_cleanup_obstack_free (&cu_list
);
20377 obstack_init (&types_cu_list
);
20378 make_cleanup_obstack_free (&types_cu_list
);
20380 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
20381 NULL
, xcalloc
, xfree
);
20382 make_cleanup_htab_delete (psyms_seen
);
20384 /* While we're scanning CU's create a table that maps a psymtab pointer
20385 (which is what addrmap records) to its index (which is what is recorded
20386 in the index file). This will later be needed to write the address
20388 cu_index_htab
= htab_create_alloc (100,
20389 hash_psymtab_cu_index
,
20390 eq_psymtab_cu_index
,
20391 NULL
, xcalloc
, xfree
);
20392 make_cleanup_htab_delete (cu_index_htab
);
20393 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
20394 xmalloc (sizeof (struct psymtab_cu_index_map
)
20395 * dwarf2_per_objfile
->n_comp_units
);
20396 make_cleanup (xfree
, psymtab_cu_index_map
);
20398 /* The CU list is already sorted, so we don't need to do additional
20399 work here. Also, the debug_types entries do not appear in
20400 all_comp_units, but only in their own hash table. */
20401 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
20403 struct dwarf2_per_cu_data
*per_cu
20404 = dwarf2_per_objfile
->all_comp_units
[i
];
20405 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
20407 struct psymtab_cu_index_map
*map
;
20410 if (psymtab
->user
== NULL
)
20411 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
20413 map
= &psymtab_cu_index_map
[i
];
20414 map
->psymtab
= psymtab
;
20416 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
20417 gdb_assert (slot
!= NULL
);
20418 gdb_assert (*slot
== NULL
);
20421 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
20422 per_cu
->offset
.sect_off
);
20423 obstack_grow (&cu_list
, val
, 8);
20424 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
20425 obstack_grow (&cu_list
, val
, 8);
20428 /* Dump the address map. */
20429 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
20431 /* Write out the .debug_type entries, if any. */
20432 if (dwarf2_per_objfile
->signatured_types
)
20434 struct signatured_type_index_data sig_data
;
20436 sig_data
.objfile
= objfile
;
20437 sig_data
.symtab
= symtab
;
20438 sig_data
.types_list
= &types_cu_list
;
20439 sig_data
.psyms_seen
= psyms_seen
;
20440 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
20441 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
20442 write_one_signatured_type
, &sig_data
);
20445 /* Now that we've processed all symbols we can shrink their cu_indices
20447 uniquify_cu_indices (symtab
);
20449 obstack_init (&constant_pool
);
20450 make_cleanup_obstack_free (&constant_pool
);
20451 obstack_init (&symtab_obstack
);
20452 make_cleanup_obstack_free (&symtab_obstack
);
20453 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
20455 obstack_init (&contents
);
20456 make_cleanup_obstack_free (&contents
);
20457 size_of_contents
= 6 * sizeof (offset_type
);
20458 total_len
= size_of_contents
;
20460 /* The version number. */
20461 val
= MAYBE_SWAP (7);
20462 obstack_grow (&contents
, &val
, sizeof (val
));
20464 /* The offset of the CU list from the start of the file. */
20465 val
= MAYBE_SWAP (total_len
);
20466 obstack_grow (&contents
, &val
, sizeof (val
));
20467 total_len
+= obstack_object_size (&cu_list
);
20469 /* The offset of the types CU list from the start of the file. */
20470 val
= MAYBE_SWAP (total_len
);
20471 obstack_grow (&contents
, &val
, sizeof (val
));
20472 total_len
+= obstack_object_size (&types_cu_list
);
20474 /* The offset of the address table from the start of the file. */
20475 val
= MAYBE_SWAP (total_len
);
20476 obstack_grow (&contents
, &val
, sizeof (val
));
20477 total_len
+= obstack_object_size (&addr_obstack
);
20479 /* The offset of the symbol table from the start of the file. */
20480 val
= MAYBE_SWAP (total_len
);
20481 obstack_grow (&contents
, &val
, sizeof (val
));
20482 total_len
+= obstack_object_size (&symtab_obstack
);
20484 /* The offset of the constant pool from the start of the file. */
20485 val
= MAYBE_SWAP (total_len
);
20486 obstack_grow (&contents
, &val
, sizeof (val
));
20487 total_len
+= obstack_object_size (&constant_pool
);
20489 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
20491 write_obstack (out_file
, &contents
);
20492 write_obstack (out_file
, &cu_list
);
20493 write_obstack (out_file
, &types_cu_list
);
20494 write_obstack (out_file
, &addr_obstack
);
20495 write_obstack (out_file
, &symtab_obstack
);
20496 write_obstack (out_file
, &constant_pool
);
20500 /* We want to keep the file, so we set cleanup_filename to NULL
20501 here. See unlink_if_set. */
20502 cleanup_filename
= NULL
;
20504 do_cleanups (cleanup
);
20507 /* Implementation of the `save gdb-index' command.
20509 Note that the file format used by this command is documented in the
20510 GDB manual. Any changes here must be documented there. */
20513 save_gdb_index_command (char *arg
, int from_tty
)
20515 struct objfile
*objfile
;
20518 error (_("usage: save gdb-index DIRECTORY"));
20520 ALL_OBJFILES (objfile
)
20524 /* If the objfile does not correspond to an actual file, skip it. */
20525 if (stat (objfile
->name
, &st
) < 0)
20528 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
20529 if (dwarf2_per_objfile
)
20531 volatile struct gdb_exception except
;
20533 TRY_CATCH (except
, RETURN_MASK_ERROR
)
20535 write_psymtabs_to_index (objfile
, arg
);
20537 if (except
.reason
< 0)
20538 exception_fprintf (gdb_stderr
, except
,
20539 _("Error while writing index for `%s': "),
20547 int dwarf2_always_disassemble
;
20550 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
20551 struct cmd_list_element
*c
, const char *value
)
20553 fprintf_filtered (file
,
20554 _("Whether to always disassemble "
20555 "DWARF expressions is %s.\n"),
20560 show_check_physname (struct ui_file
*file
, int from_tty
,
20561 struct cmd_list_element
*c
, const char *value
)
20563 fprintf_filtered (file
,
20564 _("Whether to check \"physname\" is %s.\n"),
20568 void _initialize_dwarf2_read (void);
20571 _initialize_dwarf2_read (void)
20573 struct cmd_list_element
*c
;
20575 dwarf2_objfile_data_key
20576 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
20578 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
20579 Set DWARF 2 specific variables.\n\
20580 Configure DWARF 2 variables such as the cache size"),
20581 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
20582 0/*allow-unknown*/, &maintenance_set_cmdlist
);
20584 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
20585 Show DWARF 2 specific variables\n\
20586 Show DWARF 2 variables such as the cache size"),
20587 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
20588 0/*allow-unknown*/, &maintenance_show_cmdlist
);
20590 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
20591 &dwarf2_max_cache_age
, _("\
20592 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
20593 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
20594 A higher limit means that cached compilation units will be stored\n\
20595 in memory longer, and more total memory will be used. Zero disables\n\
20596 caching, which can slow down startup."),
20598 show_dwarf2_max_cache_age
,
20599 &set_dwarf2_cmdlist
,
20600 &show_dwarf2_cmdlist
);
20602 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
20603 &dwarf2_always_disassemble
, _("\
20604 Set whether `info address' always disassembles DWARF expressions."), _("\
20605 Show whether `info address' always disassembles DWARF expressions."), _("\
20606 When enabled, DWARF expressions are always printed in an assembly-like\n\
20607 syntax. When disabled, expressions will be printed in a more\n\
20608 conversational style, when possible."),
20610 show_dwarf2_always_disassemble
,
20611 &set_dwarf2_cmdlist
,
20612 &show_dwarf2_cmdlist
);
20614 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
20615 Set debugging of the dwarf2 reader."), _("\
20616 Show debugging of the dwarf2 reader."), _("\
20617 When enabled, debugging messages are printed during dwarf2 reading\n\
20618 and symtab expansion."),
20621 &setdebuglist
, &showdebuglist
);
20623 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
20624 Set debugging of the dwarf2 DIE reader."), _("\
20625 Show debugging of the dwarf2 DIE reader."), _("\
20626 When enabled (non-zero), DIEs are dumped after they are read in.\n\
20627 The value is the maximum depth to print."),
20630 &setdebuglist
, &showdebuglist
);
20632 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
20633 Set cross-checking of \"physname\" code against demangler."), _("\
20634 Show cross-checking of \"physname\" code against demangler."), _("\
20635 When enabled, GDB's internal \"physname\" code is checked against\n\
20637 NULL
, show_check_physname
,
20638 &setdebuglist
, &showdebuglist
);
20640 add_setshow_boolean_cmd ("use-deprecated-index-sections",
20641 no_class
, &use_deprecated_index_sections
, _("\
20642 Set whether to use deprecated gdb_index sections."), _("\
20643 Show whether to use deprecated gdb_index sections."), _("\
20644 When enabled, deprecated .gdb_index sections are used anyway.\n\
20645 Normally they are ignored either because of a missing feature or\n\
20646 performance issue.\n\
20647 Warning: This option must be enabled before gdb reads the file."),
20650 &setlist
, &showlist
);
20652 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
20654 Save a gdb-index file.\n\
20655 Usage: save gdb-index DIRECTORY"),
20657 set_cmd_completer (c
, filename_completer
);