1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2015 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"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
70 #include "filestuff.h"
74 #include <sys/types.h>
76 typedef struct symbol
*symbolp
;
79 /* When == 1, print basic high level tracing messages.
80 When > 1, be more verbose.
81 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
82 static unsigned int dwarf2_read_debug
= 0;
84 /* When non-zero, dump DIEs after they are read in. */
85 static unsigned int dwarf2_die_debug
= 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname
= 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 static int use_deprecated_index_sections
= 0;
93 static const struct objfile_data
*dwarf2_objfile_data_key
;
95 /* The "aclass" indices for various kinds of computed DWARF symbols. */
97 static int dwarf2_locexpr_index
;
98 static int dwarf2_loclist_index
;
99 static int dwarf2_locexpr_block_index
;
100 static int dwarf2_loclist_block_index
;
102 /* A descriptor for dwarf sections.
104 S.ASECTION, SIZE are typically initialized when the objfile is first
105 scanned. BUFFER, READIN are filled in later when the section is read.
106 If the section contained compressed data then SIZE is updated to record
107 the uncompressed size of the section.
109 DWP file format V2 introduces a wrinkle that is easiest to handle by
110 creating the concept of virtual sections contained within a real section.
111 In DWP V2 the sections of the input DWO files are concatenated together
112 into one section, but section offsets are kept relative to the original
114 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
115 the real section this "virtual" section is contained in, and BUFFER,SIZE
116 describe the virtual section. */
118 struct dwarf2_section_info
122 /* If this is a real section, the bfd section. */
124 /* If this is a virtual section, pointer to the containing ("real")
126 struct dwarf2_section_info
*containing_section
;
128 /* Pointer to section data, only valid if readin. */
129 const gdb_byte
*buffer
;
130 /* The size of the section, real or virtual. */
132 /* If this is a virtual section, the offset in the real section.
133 Only valid if is_virtual. */
134 bfd_size_type virtual_offset
;
135 /* True if we have tried to read this section. */
137 /* True if this is a virtual section, False otherwise.
138 This specifies which of s.asection and s.containing_section to use. */
142 typedef struct dwarf2_section_info dwarf2_section_info_def
;
143 DEF_VEC_O (dwarf2_section_info_def
);
145 /* All offsets in the index are of this type. It must be
146 architecture-independent. */
147 typedef uint32_t offset_type
;
149 DEF_VEC_I (offset_type
);
151 /* Ensure only legit values are used. */
152 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
154 gdb_assert ((unsigned int) (value) <= 1); \
155 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
158 /* Ensure only legit values are used. */
159 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
161 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
162 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
163 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
166 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
167 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
169 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
170 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
173 /* A description of the mapped index. The file format is described in
174 a comment by the code that writes the index. */
177 /* Index data format version. */
180 /* The total length of the buffer. */
183 /* A pointer to the address table data. */
184 const gdb_byte
*address_table
;
186 /* Size of the address table data in bytes. */
187 offset_type address_table_size
;
189 /* The symbol table, implemented as a hash table. */
190 const offset_type
*symbol_table
;
192 /* Size in slots, each slot is 2 offset_types. */
193 offset_type symbol_table_slots
;
195 /* A pointer to the constant pool. */
196 const char *constant_pool
;
199 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
200 DEF_VEC_P (dwarf2_per_cu_ptr
);
204 int nr_uniq_abbrev_tables
;
206 int nr_symtab_sharers
;
207 int nr_stmt_less_type_units
;
208 int nr_all_type_units_reallocs
;
211 /* Collection of data recorded per objfile.
212 This hangs off of dwarf2_objfile_data_key. */
214 struct dwarf2_per_objfile
216 struct dwarf2_section_info info
;
217 struct dwarf2_section_info abbrev
;
218 struct dwarf2_section_info line
;
219 struct dwarf2_section_info loc
;
220 struct dwarf2_section_info macinfo
;
221 struct dwarf2_section_info macro
;
222 struct dwarf2_section_info str
;
223 struct dwarf2_section_info ranges
;
224 struct dwarf2_section_info addr
;
225 struct dwarf2_section_info frame
;
226 struct dwarf2_section_info eh_frame
;
227 struct dwarf2_section_info gdb_index
;
229 VEC (dwarf2_section_info_def
) *types
;
232 struct objfile
*objfile
;
234 /* Table of all the compilation units. This is used to locate
235 the target compilation unit of a particular reference. */
236 struct dwarf2_per_cu_data
**all_comp_units
;
238 /* The number of compilation units in ALL_COMP_UNITS. */
241 /* The number of .debug_types-related CUs. */
244 /* The number of elements allocated in all_type_units.
245 If there are skeleton-less TUs, we add them to all_type_units lazily. */
246 int n_allocated_type_units
;
248 /* The .debug_types-related CUs (TUs).
249 This is stored in malloc space because we may realloc it. */
250 struct signatured_type
**all_type_units
;
252 /* Table of struct type_unit_group objects.
253 The hash key is the DW_AT_stmt_list value. */
254 htab_t type_unit_groups
;
256 /* A table mapping .debug_types signatures to its signatured_type entry.
257 This is NULL if the .debug_types section hasn't been read in yet. */
258 htab_t signatured_types
;
260 /* Type unit statistics, to see how well the scaling improvements
262 struct tu_stats tu_stats
;
264 /* A chain of compilation units that are currently read in, so that
265 they can be freed later. */
266 struct dwarf2_per_cu_data
*read_in_chain
;
268 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
269 This is NULL if the table hasn't been allocated yet. */
272 /* Non-zero if we've check for whether there is a DWP file. */
275 /* The DWP file if there is one, or NULL. */
276 struct dwp_file
*dwp_file
;
278 /* The shared '.dwz' file, if one exists. This is used when the
279 original data was compressed using 'dwz -m'. */
280 struct dwz_file
*dwz_file
;
282 /* A flag indicating wether this objfile has a section loaded at a
284 int has_section_at_zero
;
286 /* True if we are using the mapped index,
287 or we are faking it for OBJF_READNOW's sake. */
288 unsigned char using_index
;
290 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
291 struct mapped_index
*index_table
;
293 /* When using index_table, this keeps track of all quick_file_names entries.
294 TUs typically share line table entries with a CU, so we maintain a
295 separate table of all line table entries to support the sharing.
296 Note that while there can be way more TUs than CUs, we've already
297 sorted all the TUs into "type unit groups", grouped by their
298 DW_AT_stmt_list value. Therefore the only sharing done here is with a
299 CU and its associated TU group if there is one. */
300 htab_t quick_file_names_table
;
302 /* Set during partial symbol reading, to prevent queueing of full
304 int reading_partial_symbols
;
306 /* Table mapping type DIEs to their struct type *.
307 This is NULL if not allocated yet.
308 The mapping is done via (CU/TU + DIE offset) -> type. */
309 htab_t die_type_hash
;
311 /* The CUs we recently read. */
312 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
314 /* Table containing line_header indexed by offset and offset_in_dwz. */
315 htab_t line_header_hash
;
318 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
320 /* Default names of the debugging sections. */
322 /* Note that if the debugging section has been compressed, it might
323 have a name like .zdebug_info. */
325 static const struct dwarf2_debug_sections dwarf2_elf_names
=
327 { ".debug_info", ".zdebug_info" },
328 { ".debug_abbrev", ".zdebug_abbrev" },
329 { ".debug_line", ".zdebug_line" },
330 { ".debug_loc", ".zdebug_loc" },
331 { ".debug_macinfo", ".zdebug_macinfo" },
332 { ".debug_macro", ".zdebug_macro" },
333 { ".debug_str", ".zdebug_str" },
334 { ".debug_ranges", ".zdebug_ranges" },
335 { ".debug_types", ".zdebug_types" },
336 { ".debug_addr", ".zdebug_addr" },
337 { ".debug_frame", ".zdebug_frame" },
338 { ".eh_frame", NULL
},
339 { ".gdb_index", ".zgdb_index" },
343 /* List of DWO/DWP sections. */
345 static const struct dwop_section_names
347 struct dwarf2_section_names abbrev_dwo
;
348 struct dwarf2_section_names info_dwo
;
349 struct dwarf2_section_names line_dwo
;
350 struct dwarf2_section_names loc_dwo
;
351 struct dwarf2_section_names macinfo_dwo
;
352 struct dwarf2_section_names macro_dwo
;
353 struct dwarf2_section_names str_dwo
;
354 struct dwarf2_section_names str_offsets_dwo
;
355 struct dwarf2_section_names types_dwo
;
356 struct dwarf2_section_names cu_index
;
357 struct dwarf2_section_names tu_index
;
361 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
362 { ".debug_info.dwo", ".zdebug_info.dwo" },
363 { ".debug_line.dwo", ".zdebug_line.dwo" },
364 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
365 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
366 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
367 { ".debug_str.dwo", ".zdebug_str.dwo" },
368 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
369 { ".debug_types.dwo", ".zdebug_types.dwo" },
370 { ".debug_cu_index", ".zdebug_cu_index" },
371 { ".debug_tu_index", ".zdebug_tu_index" },
374 /* local data types */
376 /* The data in a compilation unit header, after target2host
377 translation, looks like this. */
378 struct comp_unit_head
382 unsigned char addr_size
;
383 unsigned char signed_addr_p
;
384 sect_offset abbrev_offset
;
386 /* Size of file offsets; either 4 or 8. */
387 unsigned int offset_size
;
389 /* Size of the length field; either 4 or 12. */
390 unsigned int initial_length_size
;
392 /* Offset to the first byte of this compilation unit header in the
393 .debug_info section, for resolving relative reference dies. */
396 /* Offset to first die in this cu from the start of the cu.
397 This will be the first byte following the compilation unit header. */
398 cu_offset first_die_offset
;
401 /* Type used for delaying computation of method physnames.
402 See comments for compute_delayed_physnames. */
403 struct delayed_method_info
405 /* The type to which the method is attached, i.e., its parent class. */
408 /* The index of the method in the type's function fieldlists. */
411 /* The index of the method in the fieldlist. */
414 /* The name of the DIE. */
417 /* The DIE associated with this method. */
418 struct die_info
*die
;
421 typedef struct delayed_method_info delayed_method_info
;
422 DEF_VEC_O (delayed_method_info
);
424 /* Internal state when decoding a particular compilation unit. */
427 /* The objfile containing this compilation unit. */
428 struct objfile
*objfile
;
430 /* The header of the compilation unit. */
431 struct comp_unit_head header
;
433 /* Base address of this compilation unit. */
434 CORE_ADDR base_address
;
436 /* Non-zero if base_address has been set. */
439 /* The language we are debugging. */
440 enum language language
;
441 const struct language_defn
*language_defn
;
443 const char *producer
;
445 /* The generic symbol table building routines have separate lists for
446 file scope symbols and all all other scopes (local scopes). So
447 we need to select the right one to pass to add_symbol_to_list().
448 We do it by keeping a pointer to the correct list in list_in_scope.
450 FIXME: The original dwarf code just treated the file scope as the
451 first local scope, and all other local scopes as nested local
452 scopes, and worked fine. Check to see if we really need to
453 distinguish these in buildsym.c. */
454 struct pending
**list_in_scope
;
456 /* The abbrev table for this CU.
457 Normally this points to the abbrev table in the objfile.
458 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
459 struct abbrev_table
*abbrev_table
;
461 /* Hash table holding all the loaded partial DIEs
462 with partial_die->offset.SECT_OFF as hash. */
465 /* Storage for things with the same lifetime as this read-in compilation
466 unit, including partial DIEs. */
467 struct obstack comp_unit_obstack
;
469 /* When multiple dwarf2_cu structures are living in memory, this field
470 chains them all together, so that they can be released efficiently.
471 We will probably also want a generation counter so that most-recently-used
472 compilation units are cached... */
473 struct dwarf2_per_cu_data
*read_in_chain
;
475 /* Backlink to our per_cu entry. */
476 struct dwarf2_per_cu_data
*per_cu
;
478 /* How many compilation units ago was this CU last referenced? */
481 /* A hash table of DIE cu_offset for following references with
482 die_info->offset.sect_off as hash. */
485 /* Full DIEs if read in. */
486 struct die_info
*dies
;
488 /* A set of pointers to dwarf2_per_cu_data objects for compilation
489 units referenced by this one. Only set during full symbol processing;
490 partial symbol tables do not have dependencies. */
493 /* Header data from the line table, during full symbol processing. */
494 struct line_header
*line_header
;
496 /* A list of methods which need to have physnames computed
497 after all type information has been read. */
498 VEC (delayed_method_info
) *method_list
;
500 /* To be copied to symtab->call_site_htab. */
501 htab_t call_site_htab
;
503 /* Non-NULL if this CU came from a DWO file.
504 There is an invariant here that is important to remember:
505 Except for attributes copied from the top level DIE in the "main"
506 (or "stub") file in preparation for reading the DWO file
507 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
508 Either there isn't a DWO file (in which case this is NULL and the point
509 is moot), or there is and either we're not going to read it (in which
510 case this is NULL) or there is and we are reading it (in which case this
512 struct dwo_unit
*dwo_unit
;
514 /* The DW_AT_addr_base attribute if present, zero otherwise
515 (zero is a valid value though).
516 Note this value comes from the Fission stub CU/TU's DIE. */
519 /* The DW_AT_ranges_base attribute if present, zero otherwise
520 (zero is a valid value though).
521 Note this value comes from the Fission stub CU/TU's DIE.
522 Also note that the value is zero in the non-DWO case so this value can
523 be used without needing to know whether DWO files are in use or not.
524 N.B. This does not apply to DW_AT_ranges appearing in
525 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
526 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
527 DW_AT_ranges_base *would* have to be applied, and we'd have to care
528 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
529 ULONGEST ranges_base
;
531 /* Mark used when releasing cached dies. */
532 unsigned int mark
: 1;
534 /* This CU references .debug_loc. See the symtab->locations_valid field.
535 This test is imperfect as there may exist optimized debug code not using
536 any location list and still facing inlining issues if handled as
537 unoptimized code. For a future better test see GCC PR other/32998. */
538 unsigned int has_loclist
: 1;
540 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
541 if all the producer_is_* fields are valid. This information is cached
542 because profiling CU expansion showed excessive time spent in
543 producer_is_gxx_lt_4_6. */
544 unsigned int checked_producer
: 1;
545 unsigned int producer_is_gxx_lt_4_6
: 1;
546 unsigned int producer_is_gcc_lt_4_3
: 1;
547 unsigned int producer_is_icc
: 1;
549 /* When set, the file that we're processing is known to have
550 debugging info for C++ namespaces. GCC 3.3.x did not produce
551 this information, but later versions do. */
553 unsigned int processing_has_namespace_info
: 1;
556 /* Persistent data held for a compilation unit, even when not
557 processing it. We put a pointer to this structure in the
558 read_symtab_private field of the psymtab. */
560 struct dwarf2_per_cu_data
562 /* The start offset and length of this compilation unit.
563 NOTE: Unlike comp_unit_head.length, this length includes
565 If the DIE refers to a DWO file, this is always of the original die,
570 /* Flag indicating this compilation unit will be read in before
571 any of the current compilation units are processed. */
572 unsigned int queued
: 1;
574 /* This flag will be set when reading partial DIEs if we need to load
575 absolutely all DIEs for this compilation unit, instead of just the ones
576 we think are interesting. It gets set if we look for a DIE in the
577 hash table and don't find it. */
578 unsigned int load_all_dies
: 1;
580 /* Non-zero if this CU is from .debug_types.
581 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
583 unsigned int is_debug_types
: 1;
585 /* Non-zero if this CU is from the .dwz file. */
586 unsigned int is_dwz
: 1;
588 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
589 This flag is only valid if is_debug_types is true.
590 We can't read a CU directly from a DWO file: There are required
591 attributes in the stub. */
592 unsigned int reading_dwo_directly
: 1;
594 /* Non-zero if the TU has been read.
595 This is used to assist the "Stay in DWO Optimization" for Fission:
596 When reading a DWO, it's faster to read TUs from the DWO instead of
597 fetching them from random other DWOs (due to comdat folding).
598 If the TU has already been read, the optimization is unnecessary
599 (and unwise - we don't want to change where gdb thinks the TU lives
601 This flag is only valid if is_debug_types is true. */
602 unsigned int tu_read
: 1;
604 /* The section this CU/TU lives in.
605 If the DIE refers to a DWO file, this is always the original die,
607 struct dwarf2_section_info
*section
;
609 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
610 of the CU cache it gets reset to NULL again. */
611 struct dwarf2_cu
*cu
;
613 /* The corresponding objfile.
614 Normally we can get the objfile from dwarf2_per_objfile.
615 However we can enter this file with just a "per_cu" handle. */
616 struct objfile
*objfile
;
618 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
619 is active. Otherwise, the 'psymtab' field is active. */
622 /* The partial symbol table associated with this compilation unit,
623 or NULL for unread partial units. */
624 struct partial_symtab
*psymtab
;
626 /* Data needed by the "quick" functions. */
627 struct dwarf2_per_cu_quick_data
*quick
;
630 /* The CUs we import using DW_TAG_imported_unit. This is filled in
631 while reading psymtabs, used to compute the psymtab dependencies,
632 and then cleared. Then it is filled in again while reading full
633 symbols, and only deleted when the objfile is destroyed.
635 This is also used to work around a difference between the way gold
636 generates .gdb_index version <=7 and the way gdb does. Arguably this
637 is a gold bug. For symbols coming from TUs, gold records in the index
638 the CU that includes the TU instead of the TU itself. This breaks
639 dw2_lookup_symbol: It assumes that if the index says symbol X lives
640 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
641 will find X. Alas TUs live in their own symtab, so after expanding CU Y
642 we need to look in TU Z to find X. Fortunately, this is akin to
643 DW_TAG_imported_unit, so we just use the same mechanism: For
644 .gdb_index version <=7 this also records the TUs that the CU referred
645 to. Concurrently with this change gdb was modified to emit version 8
646 indices so we only pay a price for gold generated indices.
647 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
648 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
651 /* Entry in the signatured_types hash table. */
653 struct signatured_type
655 /* The "per_cu" object of this type.
656 This struct is used iff per_cu.is_debug_types.
657 N.B.: This is the first member so that it's easy to convert pointers
659 struct dwarf2_per_cu_data per_cu
;
661 /* The type's signature. */
664 /* Offset in the TU of the type's DIE, as read from the TU header.
665 If this TU is a DWO stub and the definition lives in a DWO file
666 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
667 cu_offset type_offset_in_tu
;
669 /* Offset in the section of the type's DIE.
670 If the definition lives in a DWO file, this is the offset in the
671 .debug_types.dwo section.
672 The value is zero until the actual value is known.
673 Zero is otherwise not a valid section offset. */
674 sect_offset type_offset_in_section
;
676 /* Type units are grouped by their DW_AT_stmt_list entry so that they
677 can share them. This points to the containing symtab. */
678 struct type_unit_group
*type_unit_group
;
681 The first time we encounter this type we fully read it in and install it
682 in the symbol tables. Subsequent times we only need the type. */
685 /* Containing DWO unit.
686 This field is valid iff per_cu.reading_dwo_directly. */
687 struct dwo_unit
*dwo_unit
;
690 typedef struct signatured_type
*sig_type_ptr
;
691 DEF_VEC_P (sig_type_ptr
);
693 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
694 This includes type_unit_group and quick_file_names. */
696 struct stmt_list_hash
698 /* The DWO unit this table is from or NULL if there is none. */
699 struct dwo_unit
*dwo_unit
;
701 /* Offset in .debug_line or .debug_line.dwo. */
702 sect_offset line_offset
;
705 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
706 an object of this type. */
708 struct type_unit_group
710 /* dwarf2read.c's main "handle" on a TU symtab.
711 To simplify things we create an artificial CU that "includes" all the
712 type units using this stmt_list so that the rest of the code still has
713 a "per_cu" handle on the symtab.
714 This PER_CU is recognized by having no section. */
715 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
716 struct dwarf2_per_cu_data per_cu
;
718 /* The TUs that share this DW_AT_stmt_list entry.
719 This is added to while parsing type units to build partial symtabs,
720 and is deleted afterwards and not used again. */
721 VEC (sig_type_ptr
) *tus
;
723 /* The compunit symtab.
724 Type units in a group needn't all be defined in the same source file,
725 so we create an essentially anonymous symtab as the compunit symtab. */
726 struct compunit_symtab
*compunit_symtab
;
728 /* The data used to construct the hash key. */
729 struct stmt_list_hash hash
;
731 /* The number of symtabs from the line header.
732 The value here must match line_header.num_file_names. */
733 unsigned int num_symtabs
;
735 /* The symbol tables for this TU (obtained from the files listed in
737 WARNING: The order of entries here must match the order of entries
738 in the line header. After the first TU using this type_unit_group, the
739 line header for the subsequent TUs is recreated from this. This is done
740 because we need to use the same symtabs for each TU using the same
741 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
742 there's no guarantee the line header doesn't have duplicate entries. */
743 struct symtab
**symtabs
;
746 /* These sections are what may appear in a (real or virtual) DWO file. */
750 struct dwarf2_section_info abbrev
;
751 struct dwarf2_section_info line
;
752 struct dwarf2_section_info loc
;
753 struct dwarf2_section_info macinfo
;
754 struct dwarf2_section_info macro
;
755 struct dwarf2_section_info str
;
756 struct dwarf2_section_info str_offsets
;
757 /* In the case of a virtual DWO file, these two are unused. */
758 struct dwarf2_section_info info
;
759 VEC (dwarf2_section_info_def
) *types
;
762 /* CUs/TUs in DWP/DWO files. */
766 /* Backlink to the containing struct dwo_file. */
767 struct dwo_file
*dwo_file
;
769 /* The "id" that distinguishes this CU/TU.
770 .debug_info calls this "dwo_id", .debug_types calls this "signature".
771 Since signatures came first, we stick with it for consistency. */
774 /* The section this CU/TU lives in, in the DWO file. */
775 struct dwarf2_section_info
*section
;
777 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
781 /* For types, offset in the type's DIE of the type defined by this TU. */
782 cu_offset type_offset_in_tu
;
785 /* include/dwarf2.h defines the DWP section codes.
786 It defines a max value but it doesn't define a min value, which we
787 use for error checking, so provide one. */
789 enum dwp_v2_section_ids
794 /* Data for one DWO file.
796 This includes virtual DWO files (a virtual DWO file is a DWO file as it
797 appears in a DWP file). DWP files don't really have DWO files per se -
798 comdat folding of types "loses" the DWO file they came from, and from
799 a high level view DWP files appear to contain a mass of random types.
800 However, to maintain consistency with the non-DWP case we pretend DWP
801 files contain virtual DWO files, and we assign each TU with one virtual
802 DWO file (generally based on the line and abbrev section offsets -
803 a heuristic that seems to work in practice). */
807 /* The DW_AT_GNU_dwo_name attribute.
808 For virtual DWO files the name is constructed from the section offsets
809 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
810 from related CU+TUs. */
811 const char *dwo_name
;
813 /* The DW_AT_comp_dir attribute. */
814 const char *comp_dir
;
816 /* The bfd, when the file is open. Otherwise this is NULL.
817 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
820 /* The sections that make up this DWO file.
821 Remember that for virtual DWO files in DWP V2, these are virtual
822 sections (for lack of a better name). */
823 struct dwo_sections sections
;
825 /* The CU in the file.
826 We only support one because having more than one requires hacking the
827 dwo_name of each to match, which is highly unlikely to happen.
828 Doing this means all TUs can share comp_dir: We also assume that
829 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
832 /* Table of TUs in the file.
833 Each element is a struct dwo_unit. */
837 /* These sections are what may appear in a DWP file. */
841 /* These are used by both DWP version 1 and 2. */
842 struct dwarf2_section_info str
;
843 struct dwarf2_section_info cu_index
;
844 struct dwarf2_section_info tu_index
;
846 /* These are only used by DWP version 2 files.
847 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
848 sections are referenced by section number, and are not recorded here.
849 In DWP version 2 there is at most one copy of all these sections, each
850 section being (effectively) comprised of the concatenation of all of the
851 individual sections that exist in the version 1 format.
852 To keep the code simple we treat each of these concatenated pieces as a
853 section itself (a virtual section?). */
854 struct dwarf2_section_info abbrev
;
855 struct dwarf2_section_info info
;
856 struct dwarf2_section_info line
;
857 struct dwarf2_section_info loc
;
858 struct dwarf2_section_info macinfo
;
859 struct dwarf2_section_info macro
;
860 struct dwarf2_section_info str_offsets
;
861 struct dwarf2_section_info types
;
864 /* These sections are what may appear in a virtual DWO file in DWP version 1.
865 A virtual DWO file is a DWO file as it appears in a DWP file. */
867 struct virtual_v1_dwo_sections
869 struct dwarf2_section_info abbrev
;
870 struct dwarf2_section_info line
;
871 struct dwarf2_section_info loc
;
872 struct dwarf2_section_info macinfo
;
873 struct dwarf2_section_info macro
;
874 struct dwarf2_section_info str_offsets
;
875 /* Each DWP hash table entry records one CU or one TU.
876 That is recorded here, and copied to dwo_unit.section. */
877 struct dwarf2_section_info info_or_types
;
880 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
881 In version 2, the sections of the DWO files are concatenated together
882 and stored in one section of that name. Thus each ELF section contains
883 several "virtual" sections. */
885 struct virtual_v2_dwo_sections
887 bfd_size_type abbrev_offset
;
888 bfd_size_type abbrev_size
;
890 bfd_size_type line_offset
;
891 bfd_size_type line_size
;
893 bfd_size_type loc_offset
;
894 bfd_size_type loc_size
;
896 bfd_size_type macinfo_offset
;
897 bfd_size_type macinfo_size
;
899 bfd_size_type macro_offset
;
900 bfd_size_type macro_size
;
902 bfd_size_type str_offsets_offset
;
903 bfd_size_type str_offsets_size
;
905 /* Each DWP hash table entry records one CU or one TU.
906 That is recorded here, and copied to dwo_unit.section. */
907 bfd_size_type info_or_types_offset
;
908 bfd_size_type info_or_types_size
;
911 /* Contents of DWP hash tables. */
913 struct dwp_hash_table
915 uint32_t version
, nr_columns
;
916 uint32_t nr_units
, nr_slots
;
917 const gdb_byte
*hash_table
, *unit_table
;
922 const gdb_byte
*indices
;
926 /* This is indexed by column number and gives the id of the section
928 #define MAX_NR_V2_DWO_SECTIONS \
929 (1 /* .debug_info or .debug_types */ \
930 + 1 /* .debug_abbrev */ \
931 + 1 /* .debug_line */ \
932 + 1 /* .debug_loc */ \
933 + 1 /* .debug_str_offsets */ \
934 + 1 /* .debug_macro or .debug_macinfo */)
935 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
936 const gdb_byte
*offsets
;
937 const gdb_byte
*sizes
;
942 /* Data for one DWP file. */
946 /* Name of the file. */
949 /* File format version. */
955 /* Section info for this file. */
956 struct dwp_sections sections
;
958 /* Table of CUs in the file. */
959 const struct dwp_hash_table
*cus
;
961 /* Table of TUs in the file. */
962 const struct dwp_hash_table
*tus
;
964 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
968 /* Table to map ELF section numbers to their sections.
969 This is only needed for the DWP V1 file format. */
970 unsigned int num_sections
;
971 asection
**elf_sections
;
974 /* This represents a '.dwz' file. */
978 /* A dwz file can only contain a few sections. */
979 struct dwarf2_section_info abbrev
;
980 struct dwarf2_section_info info
;
981 struct dwarf2_section_info str
;
982 struct dwarf2_section_info line
;
983 struct dwarf2_section_info macro
;
984 struct dwarf2_section_info gdb_index
;
990 /* Struct used to pass misc. parameters to read_die_and_children, et
991 al. which are used for both .debug_info and .debug_types dies.
992 All parameters here are unchanging for the life of the call. This
993 struct exists to abstract away the constant parameters of die reading. */
995 struct die_reader_specs
997 /* The bfd of die_section. */
1000 /* The CU of the DIE we are parsing. */
1001 struct dwarf2_cu
*cu
;
1003 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1004 struct dwo_file
*dwo_file
;
1006 /* The section the die comes from.
1007 This is either .debug_info or .debug_types, or the .dwo variants. */
1008 struct dwarf2_section_info
*die_section
;
1010 /* die_section->buffer. */
1011 const gdb_byte
*buffer
;
1013 /* The end of the buffer. */
1014 const gdb_byte
*buffer_end
;
1016 /* The value of the DW_AT_comp_dir attribute. */
1017 const char *comp_dir
;
1020 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1021 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1022 const gdb_byte
*info_ptr
,
1023 struct die_info
*comp_unit_die
,
1030 unsigned int dir_index
;
1031 unsigned int mod_time
;
1032 unsigned int length
;
1033 int included_p
; /* Non-zero if referenced by the Line Number Program. */
1034 struct symtab
*symtab
; /* The associated symbol table, if any. */
1037 /* The line number information for a compilation unit (found in the
1038 .debug_line section) begins with a "statement program header",
1039 which contains the following information. */
1042 /* Offset of line number information in .debug_line section. */
1045 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1046 unsigned offset_in_dwz
: 1;
1048 unsigned int total_length
;
1049 unsigned short version
;
1050 unsigned int header_length
;
1051 unsigned char minimum_instruction_length
;
1052 unsigned char maximum_ops_per_instruction
;
1053 unsigned char default_is_stmt
;
1055 unsigned char line_range
;
1056 unsigned char opcode_base
;
1058 /* standard_opcode_lengths[i] is the number of operands for the
1059 standard opcode whose value is i. This means that
1060 standard_opcode_lengths[0] is unused, and the last meaningful
1061 element is standard_opcode_lengths[opcode_base - 1]. */
1062 unsigned char *standard_opcode_lengths
;
1064 /* The include_directories table. NOTE! These strings are not
1065 allocated with xmalloc; instead, they are pointers into
1066 debug_line_buffer. If you try to free them, `free' will get
1068 unsigned int num_include_dirs
, include_dirs_size
;
1069 const char **include_dirs
;
1071 /* The file_names table. NOTE! These strings are not allocated
1072 with xmalloc; instead, they are pointers into debug_line_buffer.
1073 Don't try to free them directly. */
1074 unsigned int num_file_names
, file_names_size
;
1075 struct file_entry
*file_names
;
1077 /* The start and end of the statement program following this
1078 header. These point into dwarf2_per_objfile->line_buffer. */
1079 const gdb_byte
*statement_program_start
, *statement_program_end
;
1082 /* When we construct a partial symbol table entry we only
1083 need this much information. */
1084 struct partial_die_info
1086 /* Offset of this DIE. */
1089 /* DWARF-2 tag for this DIE. */
1090 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1092 /* Assorted flags describing the data found in this DIE. */
1093 unsigned int has_children
: 1;
1094 unsigned int is_external
: 1;
1095 unsigned int is_declaration
: 1;
1096 unsigned int has_type
: 1;
1097 unsigned int has_specification
: 1;
1098 unsigned int has_pc_info
: 1;
1099 unsigned int may_be_inlined
: 1;
1101 /* Flag set if the SCOPE field of this structure has been
1103 unsigned int scope_set
: 1;
1105 /* Flag set if the DIE has a byte_size attribute. */
1106 unsigned int has_byte_size
: 1;
1108 /* Flag set if any of the DIE's children are template arguments. */
1109 unsigned int has_template_arguments
: 1;
1111 /* Flag set if fixup_partial_die has been called on this die. */
1112 unsigned int fixup_called
: 1;
1114 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1115 unsigned int is_dwz
: 1;
1117 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1118 unsigned int spec_is_dwz
: 1;
1120 /* The name of this DIE. Normally the value of DW_AT_name, but
1121 sometimes a default name for unnamed DIEs. */
1124 /* The linkage name, if present. */
1125 const char *linkage_name
;
1127 /* The scope to prepend to our children. This is generally
1128 allocated on the comp_unit_obstack, so will disappear
1129 when this compilation unit leaves the cache. */
1132 /* Some data associated with the partial DIE. The tag determines
1133 which field is live. */
1136 /* The location description associated with this DIE, if any. */
1137 struct dwarf_block
*locdesc
;
1138 /* The offset of an import, for DW_TAG_imported_unit. */
1142 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1146 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1147 DW_AT_sibling, if any. */
1148 /* NOTE: This member isn't strictly necessary, read_partial_die could
1149 return DW_AT_sibling values to its caller load_partial_dies. */
1150 const gdb_byte
*sibling
;
1152 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1153 DW_AT_specification (or DW_AT_abstract_origin or
1154 DW_AT_extension). */
1155 sect_offset spec_offset
;
1157 /* Pointers to this DIE's parent, first child, and next sibling,
1159 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1162 /* This data structure holds the information of an abbrev. */
1165 unsigned int number
; /* number identifying abbrev */
1166 enum dwarf_tag tag
; /* dwarf tag */
1167 unsigned short has_children
; /* boolean */
1168 unsigned short num_attrs
; /* number of attributes */
1169 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1170 struct abbrev_info
*next
; /* next in chain */
1175 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1176 ENUM_BITFIELD(dwarf_form
) form
: 16;
1179 /* Size of abbrev_table.abbrev_hash_table. */
1180 #define ABBREV_HASH_SIZE 121
1182 /* Top level data structure to contain an abbreviation table. */
1186 /* Where the abbrev table came from.
1187 This is used as a sanity check when the table is used. */
1190 /* Storage for the abbrev table. */
1191 struct obstack abbrev_obstack
;
1193 /* Hash table of abbrevs.
1194 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1195 It could be statically allocated, but the previous code didn't so we
1197 struct abbrev_info
**abbrevs
;
1200 /* Attributes have a name and a value. */
1203 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1204 ENUM_BITFIELD(dwarf_form
) form
: 15;
1206 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1207 field should be in u.str (existing only for DW_STRING) but it is kept
1208 here for better struct attribute alignment. */
1209 unsigned int string_is_canonical
: 1;
1214 struct dwarf_block
*blk
;
1223 /* This data structure holds a complete die structure. */
1226 /* DWARF-2 tag for this DIE. */
1227 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1229 /* Number of attributes */
1230 unsigned char num_attrs
;
1232 /* True if we're presently building the full type name for the
1233 type derived from this DIE. */
1234 unsigned char building_fullname
: 1;
1236 /* True if this die is in process. PR 16581. */
1237 unsigned char in_process
: 1;
1240 unsigned int abbrev
;
1242 /* Offset in .debug_info or .debug_types section. */
1245 /* The dies in a compilation unit form an n-ary tree. PARENT
1246 points to this die's parent; CHILD points to the first child of
1247 this node; and all the children of a given node are chained
1248 together via their SIBLING fields. */
1249 struct die_info
*child
; /* Its first child, if any. */
1250 struct die_info
*sibling
; /* Its next sibling, if any. */
1251 struct die_info
*parent
; /* Its parent, if any. */
1253 /* An array of attributes, with NUM_ATTRS elements. There may be
1254 zero, but it's not common and zero-sized arrays are not
1255 sufficiently portable C. */
1256 struct attribute attrs
[1];
1259 /* Get at parts of an attribute structure. */
1261 #define DW_STRING(attr) ((attr)->u.str)
1262 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1263 #define DW_UNSND(attr) ((attr)->u.unsnd)
1264 #define DW_BLOCK(attr) ((attr)->u.blk)
1265 #define DW_SND(attr) ((attr)->u.snd)
1266 #define DW_ADDR(attr) ((attr)->u.addr)
1267 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1269 /* Blocks are a bunch of untyped bytes. */
1274 /* Valid only if SIZE is not zero. */
1275 const gdb_byte
*data
;
1278 #ifndef ATTR_ALLOC_CHUNK
1279 #define ATTR_ALLOC_CHUNK 4
1282 /* Allocate fields for structs, unions and enums in this size. */
1283 #ifndef DW_FIELD_ALLOC_CHUNK
1284 #define DW_FIELD_ALLOC_CHUNK 4
1287 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1288 but this would require a corresponding change in unpack_field_as_long
1290 static int bits_per_byte
= 8;
1294 struct nextfield
*next
;
1302 struct nextfnfield
*next
;
1303 struct fn_field fnfield
;
1310 struct nextfnfield
*head
;
1313 struct typedef_field_list
1315 struct typedef_field field
;
1316 struct typedef_field_list
*next
;
1319 /* The routines that read and process dies for a C struct or C++ class
1320 pass lists of data member fields and lists of member function fields
1321 in an instance of a field_info structure, as defined below. */
1324 /* List of data member and baseclasses fields. */
1325 struct nextfield
*fields
, *baseclasses
;
1327 /* Number of fields (including baseclasses). */
1330 /* Number of baseclasses. */
1333 /* Set if the accesibility of one of the fields is not public. */
1334 int non_public_fields
;
1336 /* Member function fields array, entries are allocated in the order they
1337 are encountered in the object file. */
1338 struct nextfnfield
*fnfields
;
1340 /* Member function fieldlist array, contains name of possibly overloaded
1341 member function, number of overloaded member functions and a pointer
1342 to the head of the member function field chain. */
1343 struct fnfieldlist
*fnfieldlists
;
1345 /* Number of entries in the fnfieldlists array. */
1348 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1349 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1350 struct typedef_field_list
*typedef_field_list
;
1351 unsigned typedef_field_list_count
;
1354 /* One item on the queue of compilation units to read in full symbols
1356 struct dwarf2_queue_item
1358 struct dwarf2_per_cu_data
*per_cu
;
1359 enum language pretend_language
;
1360 struct dwarf2_queue_item
*next
;
1363 /* The current queue. */
1364 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1366 /* Loaded secondary compilation units are kept in memory until they
1367 have not been referenced for the processing of this many
1368 compilation units. Set this to zero to disable caching. Cache
1369 sizes of up to at least twenty will improve startup time for
1370 typical inter-CU-reference binaries, at an obvious memory cost. */
1371 static int dwarf2_max_cache_age
= 5;
1373 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1374 struct cmd_list_element
*c
, const char *value
)
1376 fprintf_filtered (file
, _("The upper bound on the age of cached "
1377 "dwarf2 compilation units is %s.\n"),
1381 /* local function prototypes */
1383 static const char *get_section_name (const struct dwarf2_section_info
*);
1385 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1387 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1389 static void dwarf2_find_base_address (struct die_info
*die
,
1390 struct dwarf2_cu
*cu
);
1392 static struct partial_symtab
*create_partial_symtab
1393 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1395 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1397 static void scan_partial_symbols (struct partial_die_info
*,
1398 CORE_ADDR
*, CORE_ADDR
*,
1399 int, struct dwarf2_cu
*);
1401 static void add_partial_symbol (struct partial_die_info
*,
1402 struct dwarf2_cu
*);
1404 static void add_partial_namespace (struct partial_die_info
*pdi
,
1405 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1406 int set_addrmap
, struct dwarf2_cu
*cu
);
1408 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1409 CORE_ADDR
*highpc
, int set_addrmap
,
1410 struct dwarf2_cu
*cu
);
1412 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1413 struct dwarf2_cu
*cu
);
1415 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1416 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1417 int need_pc
, struct dwarf2_cu
*cu
);
1419 static void dwarf2_read_symtab (struct partial_symtab
*,
1422 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1424 static struct abbrev_info
*abbrev_table_lookup_abbrev
1425 (const struct abbrev_table
*, unsigned int);
1427 static struct abbrev_table
*abbrev_table_read_table
1428 (struct dwarf2_section_info
*, sect_offset
);
1430 static void abbrev_table_free (struct abbrev_table
*);
1432 static void abbrev_table_free_cleanup (void *);
1434 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1435 struct dwarf2_section_info
*);
1437 static void dwarf2_free_abbrev_table (void *);
1439 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1441 static struct partial_die_info
*load_partial_dies
1442 (const struct die_reader_specs
*, const gdb_byte
*, int);
1444 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1445 struct partial_die_info
*,
1446 struct abbrev_info
*,
1450 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1451 struct dwarf2_cu
*);
1453 static void fixup_partial_die (struct partial_die_info
*,
1454 struct dwarf2_cu
*);
1456 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1457 struct attribute
*, struct attr_abbrev
*,
1460 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1462 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1464 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1466 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1468 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1470 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1473 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1475 static LONGEST read_checked_initial_length_and_offset
1476 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1477 unsigned int *, unsigned int *);
1479 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1480 const struct comp_unit_head
*,
1483 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1485 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1488 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1490 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1492 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1493 const struct comp_unit_head
*,
1496 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1498 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1500 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1502 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1506 static const char *read_str_index (const struct die_reader_specs
*reader
,
1507 ULONGEST str_index
);
1509 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1511 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1512 struct dwarf2_cu
*);
1514 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1517 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1518 struct dwarf2_cu
*cu
);
1520 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1522 static struct die_info
*die_specification (struct die_info
*die
,
1523 struct dwarf2_cu
**);
1525 static void free_line_header (struct line_header
*lh
);
1527 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1528 struct dwarf2_cu
*cu
);
1530 static void dwarf_decode_lines (struct line_header
*, const char *,
1531 struct dwarf2_cu
*, struct partial_symtab
*,
1532 CORE_ADDR
, int decode_mapping
);
1534 static void dwarf2_start_subfile (const char *, const char *);
1536 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1537 const char *, const char *,
1540 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1541 struct dwarf2_cu
*);
1543 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1544 struct dwarf2_cu
*, struct symbol
*);
1546 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1547 struct dwarf2_cu
*);
1549 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1552 struct obstack
*obstack
,
1553 struct dwarf2_cu
*cu
, LONGEST
*value
,
1554 const gdb_byte
**bytes
,
1555 struct dwarf2_locexpr_baton
**baton
);
1557 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1559 static int need_gnat_info (struct dwarf2_cu
*);
1561 static struct type
*die_descriptive_type (struct die_info
*,
1562 struct dwarf2_cu
*);
1564 static void set_descriptive_type (struct type
*, struct die_info
*,
1565 struct dwarf2_cu
*);
1567 static struct type
*die_containing_type (struct die_info
*,
1568 struct dwarf2_cu
*);
1570 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1571 struct dwarf2_cu
*);
1573 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1575 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1577 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1579 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1580 const char *suffix
, int physname
,
1581 struct dwarf2_cu
*cu
);
1583 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1585 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1587 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1589 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1591 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1593 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1594 struct dwarf2_cu
*, struct partial_symtab
*);
1596 static int dwarf2_get_pc_bounds (struct die_info
*,
1597 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1598 struct partial_symtab
*);
1600 static void get_scope_pc_bounds (struct die_info
*,
1601 CORE_ADDR
*, CORE_ADDR
*,
1602 struct dwarf2_cu
*);
1604 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1605 CORE_ADDR
, struct dwarf2_cu
*);
1607 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1608 struct dwarf2_cu
*);
1610 static void dwarf2_attach_fields_to_type (struct field_info
*,
1611 struct type
*, struct dwarf2_cu
*);
1613 static void dwarf2_add_member_fn (struct field_info
*,
1614 struct die_info
*, struct type
*,
1615 struct dwarf2_cu
*);
1617 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1619 struct dwarf2_cu
*);
1621 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1623 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1625 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1627 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1629 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1631 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1633 static struct type
*read_module_type (struct die_info
*die
,
1634 struct dwarf2_cu
*cu
);
1636 static const char *namespace_name (struct die_info
*die
,
1637 int *is_anonymous
, struct dwarf2_cu
*);
1639 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1641 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1643 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1644 struct dwarf2_cu
*);
1646 static struct die_info
*read_die_and_siblings_1
1647 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1650 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1651 const gdb_byte
*info_ptr
,
1652 const gdb_byte
**new_info_ptr
,
1653 struct die_info
*parent
);
1655 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1656 struct die_info
**, const gdb_byte
*,
1659 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1660 struct die_info
**, const gdb_byte
*,
1663 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1665 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1668 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1670 static const char *dwarf2_full_name (const char *name
,
1671 struct die_info
*die
,
1672 struct dwarf2_cu
*cu
);
1674 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1675 struct dwarf2_cu
*cu
);
1677 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1678 struct dwarf2_cu
**);
1680 static const char *dwarf_tag_name (unsigned int);
1682 static const char *dwarf_attr_name (unsigned int);
1684 static const char *dwarf_form_name (unsigned int);
1686 static char *dwarf_bool_name (unsigned int);
1688 static const char *dwarf_type_encoding_name (unsigned int);
1690 static struct die_info
*sibling_die (struct die_info
*);
1692 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1694 static void dump_die_for_error (struct die_info
*);
1696 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1699 /*static*/ void dump_die (struct die_info
*, int max_level
);
1701 static void store_in_ref_table (struct die_info
*,
1702 struct dwarf2_cu
*);
1704 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1706 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1708 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1709 const struct attribute
*,
1710 struct dwarf2_cu
**);
1712 static struct die_info
*follow_die_ref (struct die_info
*,
1713 const struct attribute
*,
1714 struct dwarf2_cu
**);
1716 static struct die_info
*follow_die_sig (struct die_info
*,
1717 const struct attribute
*,
1718 struct dwarf2_cu
**);
1720 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1721 struct dwarf2_cu
*);
1723 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1724 const struct attribute
*,
1725 struct dwarf2_cu
*);
1727 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1729 static void read_signatured_type (struct signatured_type
*);
1731 /* memory allocation interface */
1733 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1735 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1737 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1739 static int attr_form_is_block (const struct attribute
*);
1741 static int attr_form_is_section_offset (const struct attribute
*);
1743 static int attr_form_is_constant (const struct attribute
*);
1745 static int attr_form_is_ref (const struct attribute
*);
1747 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1748 struct dwarf2_loclist_baton
*baton
,
1749 const struct attribute
*attr
);
1751 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1753 struct dwarf2_cu
*cu
,
1756 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1757 const gdb_byte
*info_ptr
,
1758 struct abbrev_info
*abbrev
);
1760 static void free_stack_comp_unit (void *);
1762 static hashval_t
partial_die_hash (const void *item
);
1764 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1766 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1767 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1769 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1770 struct dwarf2_per_cu_data
*per_cu
);
1772 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1773 struct die_info
*comp_unit_die
,
1774 enum language pretend_language
);
1776 static void free_heap_comp_unit (void *);
1778 static void free_cached_comp_units (void *);
1780 static void age_cached_comp_units (void);
1782 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1784 static struct type
*set_die_type (struct die_info
*, struct type
*,
1785 struct dwarf2_cu
*);
1787 static void create_all_comp_units (struct objfile
*);
1789 static int create_all_type_units (struct objfile
*);
1791 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1794 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1797 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1800 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1801 struct dwarf2_per_cu_data
*);
1803 static void dwarf2_mark (struct dwarf2_cu
*);
1805 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1807 static struct type
*get_die_type_at_offset (sect_offset
,
1808 struct dwarf2_per_cu_data
*);
1810 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1812 static void dwarf2_release_queue (void *dummy
);
1814 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1815 enum language pretend_language
);
1817 static void process_queue (void);
1819 static void find_file_and_directory (struct die_info
*die
,
1820 struct dwarf2_cu
*cu
,
1821 const char **name
, const char **comp_dir
);
1823 static char *file_full_name (int file
, struct line_header
*lh
,
1824 const char *comp_dir
);
1826 static const gdb_byte
*read_and_check_comp_unit_head
1827 (struct comp_unit_head
*header
,
1828 struct dwarf2_section_info
*section
,
1829 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1830 int is_debug_types_section
);
1832 static void init_cutu_and_read_dies
1833 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1834 int use_existing_cu
, int keep
,
1835 die_reader_func_ftype
*die_reader_func
, void *data
);
1837 static void init_cutu_and_read_dies_simple
1838 (struct dwarf2_per_cu_data
*this_cu
,
1839 die_reader_func_ftype
*die_reader_func
, void *data
);
1841 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1843 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1845 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1846 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1847 ULONGEST signature
, int is_debug_types
);
1849 static struct dwp_file
*get_dwp_file (void);
1851 static struct dwo_unit
*lookup_dwo_comp_unit
1852 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1854 static struct dwo_unit
*lookup_dwo_type_unit
1855 (struct signatured_type
*, const char *, const char *);
1857 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1859 static void free_dwo_file_cleanup (void *);
1861 static void process_cu_includes (void);
1863 static void check_producer (struct dwarf2_cu
*cu
);
1865 static void free_line_header_voidp (void *arg
);
1867 /* Various complaints about symbol reading that don't abort the process. */
1870 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1872 complaint (&symfile_complaints
,
1873 _("statement list doesn't fit in .debug_line section"));
1877 dwarf2_debug_line_missing_file_complaint (void)
1879 complaint (&symfile_complaints
,
1880 _(".debug_line section has line data without a file"));
1884 dwarf2_debug_line_missing_end_sequence_complaint (void)
1886 complaint (&symfile_complaints
,
1887 _(".debug_line section has line "
1888 "program sequence without an end"));
1892 dwarf2_complex_location_expr_complaint (void)
1894 complaint (&symfile_complaints
, _("location expression too complex"));
1898 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1901 complaint (&symfile_complaints
,
1902 _("const value length mismatch for '%s', got %d, expected %d"),
1907 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1909 complaint (&symfile_complaints
,
1910 _("debug info runs off end of %s section"
1912 get_section_name (section
),
1913 get_section_file_name (section
));
1917 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1919 complaint (&symfile_complaints
,
1920 _("macro debug info contains a "
1921 "malformed macro definition:\n`%s'"),
1926 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1928 complaint (&symfile_complaints
,
1929 _("invalid attribute class or form for '%s' in '%s'"),
1933 /* Hash function for line_header_hash. */
1936 line_header_hash (const struct line_header
*ofs
)
1938 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1941 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1944 line_header_hash_voidp (const void *item
)
1946 const struct line_header
*ofs
= item
;
1948 return line_header_hash (ofs
);
1951 /* Equality function for line_header_hash. */
1954 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1956 const struct line_header
*ofs_lhs
= item_lhs
;
1957 const struct line_header
*ofs_rhs
= item_rhs
;
1959 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1960 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1966 /* Convert VALUE between big- and little-endian. */
1968 byte_swap (offset_type value
)
1972 result
= (value
& 0xff) << 24;
1973 result
|= (value
& 0xff00) << 8;
1974 result
|= (value
& 0xff0000) >> 8;
1975 result
|= (value
& 0xff000000) >> 24;
1979 #define MAYBE_SWAP(V) byte_swap (V)
1982 #define MAYBE_SWAP(V) (V)
1983 #endif /* WORDS_BIGENDIAN */
1985 /* Read the given attribute value as an address, taking the attribute's
1986 form into account. */
1989 attr_value_as_address (struct attribute
*attr
)
1993 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
1995 /* Aside from a few clearly defined exceptions, attributes that
1996 contain an address must always be in DW_FORM_addr form.
1997 Unfortunately, some compilers happen to be violating this
1998 requirement by encoding addresses using other forms, such
1999 as DW_FORM_data4 for example. For those broken compilers,
2000 we try to do our best, without any guarantee of success,
2001 to interpret the address correctly. It would also be nice
2002 to generate a complaint, but that would require us to maintain
2003 a list of legitimate cases where a non-address form is allowed,
2004 as well as update callers to pass in at least the CU's DWARF
2005 version. This is more overhead than what we're willing to
2006 expand for a pretty rare case. */
2007 addr
= DW_UNSND (attr
);
2010 addr
= DW_ADDR (attr
);
2015 /* The suffix for an index file. */
2016 #define INDEX_SUFFIX ".gdb-index"
2018 /* Try to locate the sections we need for DWARF 2 debugging
2019 information and return true if we have enough to do something.
2020 NAMES points to the dwarf2 section names, or is NULL if the standard
2021 ELF names are used. */
2024 dwarf2_has_info (struct objfile
*objfile
,
2025 const struct dwarf2_debug_sections
*names
)
2027 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2028 if (!dwarf2_per_objfile
)
2030 /* Initialize per-objfile state. */
2031 struct dwarf2_per_objfile
*data
2032 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
2034 memset (data
, 0, sizeof (*data
));
2035 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2036 dwarf2_per_objfile
= data
;
2038 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2040 dwarf2_per_objfile
->objfile
= objfile
;
2042 return (!dwarf2_per_objfile
->info
.is_virtual
2043 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
2044 && !dwarf2_per_objfile
->abbrev
.is_virtual
2045 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
2048 /* Return the containing section of virtual section SECTION. */
2050 static struct dwarf2_section_info
*
2051 get_containing_section (const struct dwarf2_section_info
*section
)
2053 gdb_assert (section
->is_virtual
);
2054 return section
->s
.containing_section
;
2057 /* Return the bfd owner of SECTION. */
2060 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2062 if (section
->is_virtual
)
2064 section
= get_containing_section (section
);
2065 gdb_assert (!section
->is_virtual
);
2067 return section
->s
.asection
->owner
;
2070 /* Return the bfd section of SECTION.
2071 Returns NULL if the section is not present. */
2074 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2076 if (section
->is_virtual
)
2078 section
= get_containing_section (section
);
2079 gdb_assert (!section
->is_virtual
);
2081 return section
->s
.asection
;
2084 /* Return the name of SECTION. */
2087 get_section_name (const struct dwarf2_section_info
*section
)
2089 asection
*sectp
= get_section_bfd_section (section
);
2091 gdb_assert (sectp
!= NULL
);
2092 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2095 /* Return the name of the file SECTION is in. */
2098 get_section_file_name (const struct dwarf2_section_info
*section
)
2100 bfd
*abfd
= get_section_bfd_owner (section
);
2102 return bfd_get_filename (abfd
);
2105 /* Return the id of SECTION.
2106 Returns 0 if SECTION doesn't exist. */
2109 get_section_id (const struct dwarf2_section_info
*section
)
2111 asection
*sectp
= get_section_bfd_section (section
);
2118 /* Return the flags of SECTION.
2119 SECTION (or containing section if this is a virtual section) must exist. */
2122 get_section_flags (const struct dwarf2_section_info
*section
)
2124 asection
*sectp
= get_section_bfd_section (section
);
2126 gdb_assert (sectp
!= NULL
);
2127 return bfd_get_section_flags (sectp
->owner
, sectp
);
2130 /* When loading sections, we look either for uncompressed section or for
2131 compressed section names. */
2134 section_is_p (const char *section_name
,
2135 const struct dwarf2_section_names
*names
)
2137 if (names
->normal
!= NULL
2138 && strcmp (section_name
, names
->normal
) == 0)
2140 if (names
->compressed
!= NULL
2141 && strcmp (section_name
, names
->compressed
) == 0)
2146 /* This function is mapped across the sections and remembers the
2147 offset and size of each of the debugging sections we are interested
2151 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2153 const struct dwarf2_debug_sections
*names
;
2154 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2157 names
= &dwarf2_elf_names
;
2159 names
= (const struct dwarf2_debug_sections
*) vnames
;
2161 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2164 else if (section_is_p (sectp
->name
, &names
->info
))
2166 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2167 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2169 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2171 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2172 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2174 else if (section_is_p (sectp
->name
, &names
->line
))
2176 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2177 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2179 else if (section_is_p (sectp
->name
, &names
->loc
))
2181 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2182 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2184 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2186 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2187 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2189 else if (section_is_p (sectp
->name
, &names
->macro
))
2191 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2192 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2194 else if (section_is_p (sectp
->name
, &names
->str
))
2196 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2197 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2199 else if (section_is_p (sectp
->name
, &names
->addr
))
2201 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2202 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2204 else if (section_is_p (sectp
->name
, &names
->frame
))
2206 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2207 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2209 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2211 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2212 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2214 else if (section_is_p (sectp
->name
, &names
->ranges
))
2216 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2217 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2219 else if (section_is_p (sectp
->name
, &names
->types
))
2221 struct dwarf2_section_info type_section
;
2223 memset (&type_section
, 0, sizeof (type_section
));
2224 type_section
.s
.asection
= sectp
;
2225 type_section
.size
= bfd_get_section_size (sectp
);
2227 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2230 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2232 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2233 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2236 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
2237 && bfd_section_vma (abfd
, sectp
) == 0)
2238 dwarf2_per_objfile
->has_section_at_zero
= 1;
2241 /* A helper function that decides whether a section is empty,
2245 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2247 if (section
->is_virtual
)
2248 return section
->size
== 0;
2249 return section
->s
.asection
== NULL
|| section
->size
== 0;
2252 /* Read the contents of the section INFO.
2253 OBJFILE is the main object file, but not necessarily the file where
2254 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2256 If the section is compressed, uncompress it before returning. */
2259 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2263 gdb_byte
*buf
, *retbuf
;
2267 info
->buffer
= NULL
;
2270 if (dwarf2_section_empty_p (info
))
2273 sectp
= get_section_bfd_section (info
);
2275 /* If this is a virtual section we need to read in the real one first. */
2276 if (info
->is_virtual
)
2278 struct dwarf2_section_info
*containing_section
=
2279 get_containing_section (info
);
2281 gdb_assert (sectp
!= NULL
);
2282 if ((sectp
->flags
& SEC_RELOC
) != 0)
2284 error (_("Dwarf Error: DWP format V2 with relocations is not"
2285 " supported in section %s [in module %s]"),
2286 get_section_name (info
), get_section_file_name (info
));
2288 dwarf2_read_section (objfile
, containing_section
);
2289 /* Other code should have already caught virtual sections that don't
2291 gdb_assert (info
->virtual_offset
+ info
->size
2292 <= containing_section
->size
);
2293 /* If the real section is empty or there was a problem reading the
2294 section we shouldn't get here. */
2295 gdb_assert (containing_section
->buffer
!= NULL
);
2296 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2300 /* If the section has relocations, we must read it ourselves.
2301 Otherwise we attach it to the BFD. */
2302 if ((sectp
->flags
& SEC_RELOC
) == 0)
2304 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2308 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2311 /* When debugging .o files, we may need to apply relocations; see
2312 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2313 We never compress sections in .o files, so we only need to
2314 try this when the section is not compressed. */
2315 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2318 info
->buffer
= retbuf
;
2322 abfd
= get_section_bfd_owner (info
);
2323 gdb_assert (abfd
!= NULL
);
2325 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2326 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2328 error (_("Dwarf Error: Can't read DWARF data"
2329 " in section %s [in module %s]"),
2330 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2334 /* A helper function that returns the size of a section in a safe way.
2335 If you are positive that the section has been read before using the
2336 size, then it is safe to refer to the dwarf2_section_info object's
2337 "size" field directly. In other cases, you must call this
2338 function, because for compressed sections the size field is not set
2339 correctly until the section has been read. */
2341 static bfd_size_type
2342 dwarf2_section_size (struct objfile
*objfile
,
2343 struct dwarf2_section_info
*info
)
2346 dwarf2_read_section (objfile
, info
);
2350 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2354 dwarf2_get_section_info (struct objfile
*objfile
,
2355 enum dwarf2_section_enum sect
,
2356 asection
**sectp
, const gdb_byte
**bufp
,
2357 bfd_size_type
*sizep
)
2359 struct dwarf2_per_objfile
*data
2360 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2361 struct dwarf2_section_info
*info
;
2363 /* We may see an objfile without any DWARF, in which case we just
2374 case DWARF2_DEBUG_FRAME
:
2375 info
= &data
->frame
;
2377 case DWARF2_EH_FRAME
:
2378 info
= &data
->eh_frame
;
2381 gdb_assert_not_reached ("unexpected section");
2384 dwarf2_read_section (objfile
, info
);
2386 *sectp
= get_section_bfd_section (info
);
2387 *bufp
= info
->buffer
;
2388 *sizep
= info
->size
;
2391 /* A helper function to find the sections for a .dwz file. */
2394 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2396 struct dwz_file
*dwz_file
= arg
;
2398 /* Note that we only support the standard ELF names, because .dwz
2399 is ELF-only (at the time of writing). */
2400 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2402 dwz_file
->abbrev
.s
.asection
= sectp
;
2403 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2405 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2407 dwz_file
->info
.s
.asection
= sectp
;
2408 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2410 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2412 dwz_file
->str
.s
.asection
= sectp
;
2413 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2415 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2417 dwz_file
->line
.s
.asection
= sectp
;
2418 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2420 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2422 dwz_file
->macro
.s
.asection
= sectp
;
2423 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2425 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2427 dwz_file
->gdb_index
.s
.asection
= sectp
;
2428 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2432 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2433 there is no .gnu_debugaltlink section in the file. Error if there
2434 is such a section but the file cannot be found. */
2436 static struct dwz_file
*
2437 dwarf2_get_dwz_file (void)
2441 struct cleanup
*cleanup
;
2442 const char *filename
;
2443 struct dwz_file
*result
;
2444 bfd_size_type buildid_len_arg
;
2448 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2449 return dwarf2_per_objfile
->dwz_file
;
2451 bfd_set_error (bfd_error_no_error
);
2452 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2453 &buildid_len_arg
, &buildid
);
2456 if (bfd_get_error () == bfd_error_no_error
)
2458 error (_("could not read '.gnu_debugaltlink' section: %s"),
2459 bfd_errmsg (bfd_get_error ()));
2461 cleanup
= make_cleanup (xfree
, data
);
2462 make_cleanup (xfree
, buildid
);
2464 buildid_len
= (size_t) buildid_len_arg
;
2466 filename
= (const char *) data
;
2467 if (!IS_ABSOLUTE_PATH (filename
))
2469 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2472 make_cleanup (xfree
, abs
);
2473 abs
= ldirname (abs
);
2474 make_cleanup (xfree
, abs
);
2476 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2477 make_cleanup (xfree
, rel
);
2481 /* First try the file name given in the section. If that doesn't
2482 work, try to use the build-id instead. */
2483 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2484 if (dwz_bfd
!= NULL
)
2486 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2488 gdb_bfd_unref (dwz_bfd
);
2493 if (dwz_bfd
== NULL
)
2494 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2496 if (dwz_bfd
== NULL
)
2497 error (_("could not find '.gnu_debugaltlink' file for %s"),
2498 objfile_name (dwarf2_per_objfile
->objfile
));
2500 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2502 result
->dwz_bfd
= dwz_bfd
;
2504 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2506 do_cleanups (cleanup
);
2508 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2509 dwarf2_per_objfile
->dwz_file
= result
;
2513 /* DWARF quick_symbols_functions support. */
2515 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2516 unique line tables, so we maintain a separate table of all .debug_line
2517 derived entries to support the sharing.
2518 All the quick functions need is the list of file names. We discard the
2519 line_header when we're done and don't need to record it here. */
2520 struct quick_file_names
2522 /* The data used to construct the hash key. */
2523 struct stmt_list_hash hash
;
2525 /* The number of entries in file_names, real_names. */
2526 unsigned int num_file_names
;
2528 /* The file names from the line table, after being run through
2530 const char **file_names
;
2532 /* The file names from the line table after being run through
2533 gdb_realpath. These are computed lazily. */
2534 const char **real_names
;
2537 /* When using the index (and thus not using psymtabs), each CU has an
2538 object of this type. This is used to hold information needed by
2539 the various "quick" methods. */
2540 struct dwarf2_per_cu_quick_data
2542 /* The file table. This can be NULL if there was no file table
2543 or it's currently not read in.
2544 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2545 struct quick_file_names
*file_names
;
2547 /* The corresponding symbol table. This is NULL if symbols for this
2548 CU have not yet been read. */
2549 struct compunit_symtab
*compunit_symtab
;
2551 /* A temporary mark bit used when iterating over all CUs in
2552 expand_symtabs_matching. */
2553 unsigned int mark
: 1;
2555 /* True if we've tried to read the file table and found there isn't one.
2556 There will be no point in trying to read it again next time. */
2557 unsigned int no_file_data
: 1;
2560 /* Utility hash function for a stmt_list_hash. */
2563 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2567 if (stmt_list_hash
->dwo_unit
!= NULL
)
2568 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2569 v
+= stmt_list_hash
->line_offset
.sect_off
;
2573 /* Utility equality function for a stmt_list_hash. */
2576 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2577 const struct stmt_list_hash
*rhs
)
2579 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2581 if (lhs
->dwo_unit
!= NULL
2582 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2585 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2588 /* Hash function for a quick_file_names. */
2591 hash_file_name_entry (const void *e
)
2593 const struct quick_file_names
*file_data
= e
;
2595 return hash_stmt_list_entry (&file_data
->hash
);
2598 /* Equality function for a quick_file_names. */
2601 eq_file_name_entry (const void *a
, const void *b
)
2603 const struct quick_file_names
*ea
= a
;
2604 const struct quick_file_names
*eb
= b
;
2606 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2609 /* Delete function for a quick_file_names. */
2612 delete_file_name_entry (void *e
)
2614 struct quick_file_names
*file_data
= e
;
2617 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2619 xfree ((void*) file_data
->file_names
[i
]);
2620 if (file_data
->real_names
)
2621 xfree ((void*) file_data
->real_names
[i
]);
2624 /* The space for the struct itself lives on objfile_obstack,
2625 so we don't free it here. */
2628 /* Create a quick_file_names hash table. */
2631 create_quick_file_names_table (unsigned int nr_initial_entries
)
2633 return htab_create_alloc (nr_initial_entries
,
2634 hash_file_name_entry
, eq_file_name_entry
,
2635 delete_file_name_entry
, xcalloc
, xfree
);
2638 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2639 have to be created afterwards. You should call age_cached_comp_units after
2640 processing PER_CU->CU. dw2_setup must have been already called. */
2643 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2645 if (per_cu
->is_debug_types
)
2646 load_full_type_unit (per_cu
);
2648 load_full_comp_unit (per_cu
, language_minimal
);
2650 gdb_assert (per_cu
->cu
!= NULL
);
2652 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2655 /* Read in the symbols for PER_CU. */
2658 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2660 struct cleanup
*back_to
;
2662 /* Skip type_unit_groups, reading the type units they contain
2663 is handled elsewhere. */
2664 if (IS_TYPE_UNIT_GROUP (per_cu
))
2667 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2669 if (dwarf2_per_objfile
->using_index
2670 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2671 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2673 queue_comp_unit (per_cu
, language_minimal
);
2676 /* If we just loaded a CU from a DWO, and we're working with an index
2677 that may badly handle TUs, load all the TUs in that DWO as well.
2678 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2679 if (!per_cu
->is_debug_types
2680 && per_cu
->cu
->dwo_unit
!= NULL
2681 && dwarf2_per_objfile
->index_table
!= NULL
2682 && dwarf2_per_objfile
->index_table
->version
<= 7
2683 /* DWP files aren't supported yet. */
2684 && get_dwp_file () == NULL
)
2685 queue_and_load_all_dwo_tus (per_cu
);
2690 /* Age the cache, releasing compilation units that have not
2691 been used recently. */
2692 age_cached_comp_units ();
2694 do_cleanups (back_to
);
2697 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2698 the objfile from which this CU came. Returns the resulting symbol
2701 static struct compunit_symtab
*
2702 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2704 gdb_assert (dwarf2_per_objfile
->using_index
);
2705 if (!per_cu
->v
.quick
->compunit_symtab
)
2707 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2708 increment_reading_symtab ();
2709 dw2_do_instantiate_symtab (per_cu
);
2710 process_cu_includes ();
2711 do_cleanups (back_to
);
2714 return per_cu
->v
.quick
->compunit_symtab
;
2717 /* Return the CU/TU given its index.
2719 This is intended for loops like:
2721 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2722 + dwarf2_per_objfile->n_type_units); ++i)
2724 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2730 static struct dwarf2_per_cu_data
*
2731 dw2_get_cutu (int index
)
2733 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2735 index
-= dwarf2_per_objfile
->n_comp_units
;
2736 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2737 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2740 return dwarf2_per_objfile
->all_comp_units
[index
];
2743 /* Return the CU given its index.
2744 This differs from dw2_get_cutu in that it's for when you know INDEX
2747 static struct dwarf2_per_cu_data
*
2748 dw2_get_cu (int index
)
2750 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2752 return dwarf2_per_objfile
->all_comp_units
[index
];
2755 /* A helper for create_cus_from_index that handles a given list of
2759 create_cus_from_index_list (struct objfile
*objfile
,
2760 const gdb_byte
*cu_list
, offset_type n_elements
,
2761 struct dwarf2_section_info
*section
,
2767 for (i
= 0; i
< n_elements
; i
+= 2)
2769 struct dwarf2_per_cu_data
*the_cu
;
2770 ULONGEST offset
, length
;
2772 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2773 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2774 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2777 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2778 struct dwarf2_per_cu_data
);
2779 the_cu
->offset
.sect_off
= offset
;
2780 the_cu
->length
= length
;
2781 the_cu
->objfile
= objfile
;
2782 the_cu
->section
= section
;
2783 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2784 struct dwarf2_per_cu_quick_data
);
2785 the_cu
->is_dwz
= is_dwz
;
2786 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2790 /* Read the CU list from the mapped index, and use it to create all
2791 the CU objects for this objfile. */
2794 create_cus_from_index (struct objfile
*objfile
,
2795 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2796 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2798 struct dwz_file
*dwz
;
2800 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2801 dwarf2_per_objfile
->all_comp_units
2802 = obstack_alloc (&objfile
->objfile_obstack
,
2803 dwarf2_per_objfile
->n_comp_units
2804 * sizeof (struct dwarf2_per_cu_data
*));
2806 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2807 &dwarf2_per_objfile
->info
, 0, 0);
2809 if (dwz_elements
== 0)
2812 dwz
= dwarf2_get_dwz_file ();
2813 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2814 cu_list_elements
/ 2);
2817 /* Create the signatured type hash table from the index. */
2820 create_signatured_type_table_from_index (struct objfile
*objfile
,
2821 struct dwarf2_section_info
*section
,
2822 const gdb_byte
*bytes
,
2823 offset_type elements
)
2826 htab_t sig_types_hash
;
2828 dwarf2_per_objfile
->n_type_units
2829 = dwarf2_per_objfile
->n_allocated_type_units
2831 dwarf2_per_objfile
->all_type_units
2832 = xmalloc (dwarf2_per_objfile
->n_type_units
2833 * sizeof (struct signatured_type
*));
2835 sig_types_hash
= allocate_signatured_type_table (objfile
);
2837 for (i
= 0; i
< elements
; i
+= 3)
2839 struct signatured_type
*sig_type
;
2840 ULONGEST offset
, type_offset_in_tu
, signature
;
2843 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2844 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2845 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2847 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2850 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2851 struct signatured_type
);
2852 sig_type
->signature
= signature
;
2853 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2854 sig_type
->per_cu
.is_debug_types
= 1;
2855 sig_type
->per_cu
.section
= section
;
2856 sig_type
->per_cu
.offset
.sect_off
= offset
;
2857 sig_type
->per_cu
.objfile
= objfile
;
2858 sig_type
->per_cu
.v
.quick
2859 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2860 struct dwarf2_per_cu_quick_data
);
2862 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2865 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2868 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2871 /* Read the address map data from the mapped index, and use it to
2872 populate the objfile's psymtabs_addrmap. */
2875 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2877 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2878 const gdb_byte
*iter
, *end
;
2879 struct obstack temp_obstack
;
2880 struct addrmap
*mutable_map
;
2881 struct cleanup
*cleanup
;
2884 obstack_init (&temp_obstack
);
2885 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2886 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2888 iter
= index
->address_table
;
2889 end
= iter
+ index
->address_table_size
;
2891 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2895 ULONGEST hi
, lo
, cu_index
;
2896 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2898 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2900 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2905 complaint (&symfile_complaints
,
2906 _(".gdb_index address table has invalid range (%s - %s)"),
2907 hex_string (lo
), hex_string (hi
));
2911 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2913 complaint (&symfile_complaints
,
2914 _(".gdb_index address table has invalid CU number %u"),
2915 (unsigned) cu_index
);
2919 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2920 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2921 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2924 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2925 &objfile
->objfile_obstack
);
2926 do_cleanups (cleanup
);
2929 /* The hash function for strings in the mapped index. This is the same as
2930 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2931 implementation. This is necessary because the hash function is tied to the
2932 format of the mapped index file. The hash values do not have to match with
2935 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2938 mapped_index_string_hash (int index_version
, const void *p
)
2940 const unsigned char *str
= (const unsigned char *) p
;
2944 while ((c
= *str
++) != 0)
2946 if (index_version
>= 5)
2948 r
= r
* 67 + c
- 113;
2954 /* Find a slot in the mapped index INDEX for the object named NAME.
2955 If NAME is found, set *VEC_OUT to point to the CU vector in the
2956 constant pool and return 1. If NAME cannot be found, return 0. */
2959 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2960 offset_type
**vec_out
)
2962 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2964 offset_type slot
, step
;
2965 int (*cmp
) (const char *, const char *);
2967 if (current_language
->la_language
== language_cplus
2968 || current_language
->la_language
== language_java
2969 || current_language
->la_language
== language_fortran
)
2971 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2974 if (strchr (name
, '(') != NULL
)
2976 char *without_params
= cp_remove_params (name
);
2978 if (without_params
!= NULL
)
2980 make_cleanup (xfree
, without_params
);
2981 name
= without_params
;
2986 /* Index version 4 did not support case insensitive searches. But the
2987 indices for case insensitive languages are built in lowercase, therefore
2988 simulate our NAME being searched is also lowercased. */
2989 hash
= mapped_index_string_hash ((index
->version
== 4
2990 && case_sensitivity
== case_sensitive_off
2991 ? 5 : index
->version
),
2994 slot
= hash
& (index
->symbol_table_slots
- 1);
2995 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2996 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3000 /* Convert a slot number to an offset into the table. */
3001 offset_type i
= 2 * slot
;
3003 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3005 do_cleanups (back_to
);
3009 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3010 if (!cmp (name
, str
))
3012 *vec_out
= (offset_type
*) (index
->constant_pool
3013 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3014 do_cleanups (back_to
);
3018 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3022 /* A helper function that reads the .gdb_index from SECTION and fills
3023 in MAP. FILENAME is the name of the file containing the section;
3024 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3025 ok to use deprecated sections.
3027 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3028 out parameters that are filled in with information about the CU and
3029 TU lists in the section.
3031 Returns 1 if all went well, 0 otherwise. */
3034 read_index_from_section (struct objfile
*objfile
,
3035 const char *filename
,
3037 struct dwarf2_section_info
*section
,
3038 struct mapped_index
*map
,
3039 const gdb_byte
**cu_list
,
3040 offset_type
*cu_list_elements
,
3041 const gdb_byte
**types_list
,
3042 offset_type
*types_list_elements
)
3044 const gdb_byte
*addr
;
3045 offset_type version
;
3046 offset_type
*metadata
;
3049 if (dwarf2_section_empty_p (section
))
3052 /* Older elfutils strip versions could keep the section in the main
3053 executable while splitting it for the separate debug info file. */
3054 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3057 dwarf2_read_section (objfile
, section
);
3059 addr
= section
->buffer
;
3060 /* Version check. */
3061 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3062 /* Versions earlier than 3 emitted every copy of a psymbol. This
3063 causes the index to behave very poorly for certain requests. Version 3
3064 contained incomplete addrmap. So, it seems better to just ignore such
3068 static int warning_printed
= 0;
3069 if (!warning_printed
)
3071 warning (_("Skipping obsolete .gdb_index section in %s."),
3073 warning_printed
= 1;
3077 /* Index version 4 uses a different hash function than index version
3080 Versions earlier than 6 did not emit psymbols for inlined
3081 functions. Using these files will cause GDB not to be able to
3082 set breakpoints on inlined functions by name, so we ignore these
3083 indices unless the user has done
3084 "set use-deprecated-index-sections on". */
3085 if (version
< 6 && !deprecated_ok
)
3087 static int warning_printed
= 0;
3088 if (!warning_printed
)
3091 Skipping deprecated .gdb_index section in %s.\n\
3092 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3093 to use the section anyway."),
3095 warning_printed
= 1;
3099 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3100 of the TU (for symbols coming from TUs),
3101 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3102 Plus gold-generated indices can have duplicate entries for global symbols,
3103 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3104 These are just performance bugs, and we can't distinguish gdb-generated
3105 indices from gold-generated ones, so issue no warning here. */
3107 /* Indexes with higher version than the one supported by GDB may be no
3108 longer backward compatible. */
3112 map
->version
= version
;
3113 map
->total_size
= section
->size
;
3115 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3118 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3119 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3123 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3124 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3125 - MAYBE_SWAP (metadata
[i
]))
3129 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3130 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3131 - MAYBE_SWAP (metadata
[i
]));
3134 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3135 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3136 - MAYBE_SWAP (metadata
[i
]))
3137 / (2 * sizeof (offset_type
)));
3140 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3146 /* Read the index file. If everything went ok, initialize the "quick"
3147 elements of all the CUs and return 1. Otherwise, return 0. */
3150 dwarf2_read_index (struct objfile
*objfile
)
3152 struct mapped_index local_map
, *map
;
3153 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3154 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3155 struct dwz_file
*dwz
;
3157 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3158 use_deprecated_index_sections
,
3159 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3160 &cu_list
, &cu_list_elements
,
3161 &types_list
, &types_list_elements
))
3164 /* Don't use the index if it's empty. */
3165 if (local_map
.symbol_table_slots
== 0)
3168 /* If there is a .dwz file, read it so we can get its CU list as
3170 dwz
= dwarf2_get_dwz_file ();
3173 struct mapped_index dwz_map
;
3174 const gdb_byte
*dwz_types_ignore
;
3175 offset_type dwz_types_elements_ignore
;
3177 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3179 &dwz
->gdb_index
, &dwz_map
,
3180 &dwz_list
, &dwz_list_elements
,
3182 &dwz_types_elements_ignore
))
3184 warning (_("could not read '.gdb_index' section from %s; skipping"),
3185 bfd_get_filename (dwz
->dwz_bfd
));
3190 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3193 if (types_list_elements
)
3195 struct dwarf2_section_info
*section
;
3197 /* We can only handle a single .debug_types when we have an
3199 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3202 section
= VEC_index (dwarf2_section_info_def
,
3203 dwarf2_per_objfile
->types
, 0);
3205 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3206 types_list_elements
);
3209 create_addrmap_from_index (objfile
, &local_map
);
3211 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3214 dwarf2_per_objfile
->index_table
= map
;
3215 dwarf2_per_objfile
->using_index
= 1;
3216 dwarf2_per_objfile
->quick_file_names_table
=
3217 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3222 /* A helper for the "quick" functions which sets the global
3223 dwarf2_per_objfile according to OBJFILE. */
3226 dw2_setup (struct objfile
*objfile
)
3228 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3229 gdb_assert (dwarf2_per_objfile
);
3232 /* die_reader_func for dw2_get_file_names. */
3235 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3236 const gdb_byte
*info_ptr
,
3237 struct die_info
*comp_unit_die
,
3241 struct dwarf2_cu
*cu
= reader
->cu
;
3242 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3243 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3244 struct dwarf2_per_cu_data
*lh_cu
;
3245 struct line_header
*lh
;
3246 struct attribute
*attr
;
3248 const char *name
, *comp_dir
;
3250 struct quick_file_names
*qfn
;
3251 unsigned int line_offset
;
3253 gdb_assert (! this_cu
->is_debug_types
);
3255 /* Our callers never want to match partial units -- instead they
3256 will match the enclosing full CU. */
3257 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3259 this_cu
->v
.quick
->no_file_data
= 1;
3268 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3271 struct quick_file_names find_entry
;
3273 line_offset
= DW_UNSND (attr
);
3275 /* We may have already read in this line header (TU line header sharing).
3276 If we have we're done. */
3277 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3278 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3279 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3280 &find_entry
, INSERT
);
3283 lh_cu
->v
.quick
->file_names
= *slot
;
3287 lh
= dwarf_decode_line_header (line_offset
, cu
);
3291 lh_cu
->v
.quick
->no_file_data
= 1;
3295 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3296 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3297 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3298 gdb_assert (slot
!= NULL
);
3301 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3303 qfn
->num_file_names
= lh
->num_file_names
;
3304 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3305 lh
->num_file_names
* sizeof (char *));
3306 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3307 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3308 qfn
->real_names
= NULL
;
3310 free_line_header (lh
);
3312 lh_cu
->v
.quick
->file_names
= qfn
;
3315 /* A helper for the "quick" functions which attempts to read the line
3316 table for THIS_CU. */
3318 static struct quick_file_names
*
3319 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3321 /* This should never be called for TUs. */
3322 gdb_assert (! this_cu
->is_debug_types
);
3323 /* Nor type unit groups. */
3324 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3326 if (this_cu
->v
.quick
->file_names
!= NULL
)
3327 return this_cu
->v
.quick
->file_names
;
3328 /* If we know there is no line data, no point in looking again. */
3329 if (this_cu
->v
.quick
->no_file_data
)
3332 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3334 if (this_cu
->v
.quick
->no_file_data
)
3336 return this_cu
->v
.quick
->file_names
;
3339 /* A helper for the "quick" functions which computes and caches the
3340 real path for a given file name from the line table. */
3343 dw2_get_real_path (struct objfile
*objfile
,
3344 struct quick_file_names
*qfn
, int index
)
3346 if (qfn
->real_names
== NULL
)
3347 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3348 qfn
->num_file_names
, const char *);
3350 if (qfn
->real_names
[index
] == NULL
)
3351 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3353 return qfn
->real_names
[index
];
3356 static struct symtab
*
3357 dw2_find_last_source_symtab (struct objfile
*objfile
)
3359 struct compunit_symtab
*cust
;
3362 dw2_setup (objfile
);
3363 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3364 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3367 return compunit_primary_filetab (cust
);
3370 /* Traversal function for dw2_forget_cached_source_info. */
3373 dw2_free_cached_file_names (void **slot
, void *info
)
3375 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3377 if (file_data
->real_names
)
3381 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3383 xfree ((void*) file_data
->real_names
[i
]);
3384 file_data
->real_names
[i
] = NULL
;
3392 dw2_forget_cached_source_info (struct objfile
*objfile
)
3394 dw2_setup (objfile
);
3396 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3397 dw2_free_cached_file_names
, NULL
);
3400 /* Helper function for dw2_map_symtabs_matching_filename that expands
3401 the symtabs and calls the iterator. */
3404 dw2_map_expand_apply (struct objfile
*objfile
,
3405 struct dwarf2_per_cu_data
*per_cu
,
3406 const char *name
, const char *real_path
,
3407 int (*callback
) (struct symtab
*, void *),
3410 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3412 /* Don't visit already-expanded CUs. */
3413 if (per_cu
->v
.quick
->compunit_symtab
)
3416 /* This may expand more than one symtab, and we want to iterate over
3418 dw2_instantiate_symtab (per_cu
);
3420 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3421 objfile
->compunit_symtabs
, last_made
);
3424 /* Implementation of the map_symtabs_matching_filename method. */
3427 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3428 const char *real_path
,
3429 int (*callback
) (struct symtab
*, void *),
3433 const char *name_basename
= lbasename (name
);
3435 dw2_setup (objfile
);
3437 /* The rule is CUs specify all the files, including those used by
3438 any TU, so there's no need to scan TUs here. */
3440 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3443 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3444 struct quick_file_names
*file_data
;
3446 /* We only need to look at symtabs not already expanded. */
3447 if (per_cu
->v
.quick
->compunit_symtab
)
3450 file_data
= dw2_get_file_names (per_cu
);
3451 if (file_data
== NULL
)
3454 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3456 const char *this_name
= file_data
->file_names
[j
];
3457 const char *this_real_name
;
3459 if (compare_filenames_for_search (this_name
, name
))
3461 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3467 /* Before we invoke realpath, which can get expensive when many
3468 files are involved, do a quick comparison of the basenames. */
3469 if (! basenames_may_differ
3470 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3473 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3474 if (compare_filenames_for_search (this_real_name
, name
))
3476 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3482 if (real_path
!= NULL
)
3484 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3485 gdb_assert (IS_ABSOLUTE_PATH (name
));
3486 if (this_real_name
!= NULL
3487 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3489 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3501 /* Struct used to manage iterating over all CUs looking for a symbol. */
3503 struct dw2_symtab_iterator
3505 /* The internalized form of .gdb_index. */
3506 struct mapped_index
*index
;
3507 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3508 int want_specific_block
;
3509 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3510 Unused if !WANT_SPECIFIC_BLOCK. */
3512 /* The kind of symbol we're looking for. */
3514 /* The list of CUs from the index entry of the symbol,
3515 or NULL if not found. */
3517 /* The next element in VEC to look at. */
3519 /* The number of elements in VEC, or zero if there is no match. */
3521 /* Have we seen a global version of the symbol?
3522 If so we can ignore all further global instances.
3523 This is to work around gold/15646, inefficient gold-generated
3528 /* Initialize the index symtab iterator ITER.
3529 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3530 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3533 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3534 struct mapped_index
*index
,
3535 int want_specific_block
,
3540 iter
->index
= index
;
3541 iter
->want_specific_block
= want_specific_block
;
3542 iter
->block_index
= block_index
;
3543 iter
->domain
= domain
;
3545 iter
->global_seen
= 0;
3547 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3548 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3556 /* Return the next matching CU or NULL if there are no more. */
3558 static struct dwarf2_per_cu_data
*
3559 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3561 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3563 offset_type cu_index_and_attrs
=
3564 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3565 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3566 struct dwarf2_per_cu_data
*per_cu
;
3567 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3568 /* This value is only valid for index versions >= 7. */
3569 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3570 gdb_index_symbol_kind symbol_kind
=
3571 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3572 /* Only check the symbol attributes if they're present.
3573 Indices prior to version 7 don't record them,
3574 and indices >= 7 may elide them for certain symbols
3575 (gold does this). */
3577 (iter
->index
->version
>= 7
3578 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3580 /* Don't crash on bad data. */
3581 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3582 + dwarf2_per_objfile
->n_type_units
))
3584 complaint (&symfile_complaints
,
3585 _(".gdb_index entry has bad CU index"
3587 objfile_name (dwarf2_per_objfile
->objfile
));
3591 per_cu
= dw2_get_cutu (cu_index
);
3593 /* Skip if already read in. */
3594 if (per_cu
->v
.quick
->compunit_symtab
)
3597 /* Check static vs global. */
3600 if (iter
->want_specific_block
3601 && want_static
!= is_static
)
3603 /* Work around gold/15646. */
3604 if (!is_static
&& iter
->global_seen
)
3607 iter
->global_seen
= 1;
3610 /* Only check the symbol's kind if it has one. */
3613 switch (iter
->domain
)
3616 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3617 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3618 /* Some types are also in VAR_DOMAIN. */
3619 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3623 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3627 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3642 static struct compunit_symtab
*
3643 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3644 const char *name
, domain_enum domain
)
3646 struct compunit_symtab
*stab_best
= NULL
;
3647 struct mapped_index
*index
;
3649 dw2_setup (objfile
);
3651 index
= dwarf2_per_objfile
->index_table
;
3653 /* index is NULL if OBJF_READNOW. */
3656 struct dw2_symtab_iterator iter
;
3657 struct dwarf2_per_cu_data
*per_cu
;
3659 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3661 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3663 struct symbol
*sym
= NULL
;
3664 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3665 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3666 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3668 /* Some caution must be observed with overloaded functions
3669 and methods, since the index will not contain any overload
3670 information (but NAME might contain it). */
3671 sym
= block_lookup_symbol (block
, name
, domain
);
3673 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3675 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3681 /* Keep looking through other CUs. */
3689 dw2_print_stats (struct objfile
*objfile
)
3691 int i
, total
, count
;
3693 dw2_setup (objfile
);
3694 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3696 for (i
= 0; i
< total
; ++i
)
3698 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3700 if (!per_cu
->v
.quick
->compunit_symtab
)
3703 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3704 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3707 /* This dumps minimal information about the index.
3708 It is called via "mt print objfiles".
3709 One use is to verify .gdb_index has been loaded by the
3710 gdb.dwarf2/gdb-index.exp testcase. */
3713 dw2_dump (struct objfile
*objfile
)
3715 dw2_setup (objfile
);
3716 gdb_assert (dwarf2_per_objfile
->using_index
);
3717 printf_filtered (".gdb_index:");
3718 if (dwarf2_per_objfile
->index_table
!= NULL
)
3720 printf_filtered (" version %d\n",
3721 dwarf2_per_objfile
->index_table
->version
);
3724 printf_filtered (" faked for \"readnow\"\n");
3725 printf_filtered ("\n");
3729 dw2_relocate (struct objfile
*objfile
,
3730 const struct section_offsets
*new_offsets
,
3731 const struct section_offsets
*delta
)
3733 /* There's nothing to relocate here. */
3737 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3738 const char *func_name
)
3740 struct mapped_index
*index
;
3742 dw2_setup (objfile
);
3744 index
= dwarf2_per_objfile
->index_table
;
3746 /* index is NULL if OBJF_READNOW. */
3749 struct dw2_symtab_iterator iter
;
3750 struct dwarf2_per_cu_data
*per_cu
;
3752 /* Note: It doesn't matter what we pass for block_index here. */
3753 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3756 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3757 dw2_instantiate_symtab (per_cu
);
3762 dw2_expand_all_symtabs (struct objfile
*objfile
)
3766 dw2_setup (objfile
);
3768 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3769 + dwarf2_per_objfile
->n_type_units
); ++i
)
3771 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3773 dw2_instantiate_symtab (per_cu
);
3778 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3779 const char *fullname
)
3783 dw2_setup (objfile
);
3785 /* We don't need to consider type units here.
3786 This is only called for examining code, e.g. expand_line_sal.
3787 There can be an order of magnitude (or more) more type units
3788 than comp units, and we avoid them if we can. */
3790 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3793 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3794 struct quick_file_names
*file_data
;
3796 /* We only need to look at symtabs not already expanded. */
3797 if (per_cu
->v
.quick
->compunit_symtab
)
3800 file_data
= dw2_get_file_names (per_cu
);
3801 if (file_data
== NULL
)
3804 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3806 const char *this_fullname
= file_data
->file_names
[j
];
3808 if (filename_cmp (this_fullname
, fullname
) == 0)
3810 dw2_instantiate_symtab (per_cu
);
3818 dw2_map_matching_symbols (struct objfile
*objfile
,
3819 const char * name
, domain_enum domain
,
3821 int (*callback
) (struct block
*,
3822 struct symbol
*, void *),
3823 void *data
, symbol_compare_ftype
*match
,
3824 symbol_compare_ftype
*ordered_compare
)
3826 /* Currently unimplemented; used for Ada. The function can be called if the
3827 current language is Ada for a non-Ada objfile using GNU index. As Ada
3828 does not look for non-Ada symbols this function should just return. */
3832 dw2_expand_symtabs_matching
3833 (struct objfile
*objfile
,
3834 expand_symtabs_file_matcher_ftype
*file_matcher
,
3835 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3836 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3837 enum search_domain kind
,
3842 struct mapped_index
*index
;
3844 dw2_setup (objfile
);
3846 /* index_table is NULL if OBJF_READNOW. */
3847 if (!dwarf2_per_objfile
->index_table
)
3849 index
= dwarf2_per_objfile
->index_table
;
3851 if (file_matcher
!= NULL
)
3853 struct cleanup
*cleanup
;
3854 htab_t visited_found
, visited_not_found
;
3856 visited_found
= htab_create_alloc (10,
3857 htab_hash_pointer
, htab_eq_pointer
,
3858 NULL
, xcalloc
, xfree
);
3859 cleanup
= make_cleanup_htab_delete (visited_found
);
3860 visited_not_found
= htab_create_alloc (10,
3861 htab_hash_pointer
, htab_eq_pointer
,
3862 NULL
, xcalloc
, xfree
);
3863 make_cleanup_htab_delete (visited_not_found
);
3865 /* The rule is CUs specify all the files, including those used by
3866 any TU, so there's no need to scan TUs here. */
3868 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3871 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3872 struct quick_file_names
*file_data
;
3875 per_cu
->v
.quick
->mark
= 0;
3877 /* We only need to look at symtabs not already expanded. */
3878 if (per_cu
->v
.quick
->compunit_symtab
)
3881 file_data
= dw2_get_file_names (per_cu
);
3882 if (file_data
== NULL
)
3885 if (htab_find (visited_not_found
, file_data
) != NULL
)
3887 else if (htab_find (visited_found
, file_data
) != NULL
)
3889 per_cu
->v
.quick
->mark
= 1;
3893 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3895 const char *this_real_name
;
3897 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3899 per_cu
->v
.quick
->mark
= 1;
3903 /* Before we invoke realpath, which can get expensive when many
3904 files are involved, do a quick comparison of the basenames. */
3905 if (!basenames_may_differ
3906 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3910 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3911 if (file_matcher (this_real_name
, data
, 0))
3913 per_cu
->v
.quick
->mark
= 1;
3918 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3920 : visited_not_found
,
3925 do_cleanups (cleanup
);
3928 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3930 offset_type idx
= 2 * iter
;
3932 offset_type
*vec
, vec_len
, vec_idx
;
3933 int global_seen
= 0;
3935 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3938 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3940 if (! (*symbol_matcher
) (name
, data
))
3943 /* The name was matched, now expand corresponding CUs that were
3945 vec
= (offset_type
*) (index
->constant_pool
3946 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3947 vec_len
= MAYBE_SWAP (vec
[0]);
3948 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3950 struct dwarf2_per_cu_data
*per_cu
;
3951 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3952 /* This value is only valid for index versions >= 7. */
3953 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3954 gdb_index_symbol_kind symbol_kind
=
3955 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3956 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3957 /* Only check the symbol attributes if they're present.
3958 Indices prior to version 7 don't record them,
3959 and indices >= 7 may elide them for certain symbols
3960 (gold does this). */
3962 (index
->version
>= 7
3963 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3965 /* Work around gold/15646. */
3968 if (!is_static
&& global_seen
)
3974 /* Only check the symbol's kind if it has one. */
3979 case VARIABLES_DOMAIN
:
3980 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3983 case FUNCTIONS_DOMAIN
:
3984 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3988 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3996 /* Don't crash on bad data. */
3997 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3998 + dwarf2_per_objfile
->n_type_units
))
4000 complaint (&symfile_complaints
,
4001 _(".gdb_index entry has bad CU index"
4002 " [in module %s]"), objfile_name (objfile
));
4006 per_cu
= dw2_get_cutu (cu_index
);
4007 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4009 int symtab_was_null
=
4010 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4012 dw2_instantiate_symtab (per_cu
);
4014 if (expansion_notify
!= NULL
4016 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4018 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4026 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4029 static struct compunit_symtab
*
4030 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4035 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4036 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4039 if (cust
->includes
== NULL
)
4042 for (i
= 0; cust
->includes
[i
]; ++i
)
4044 struct compunit_symtab
*s
= cust
->includes
[i
];
4046 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4054 static struct compunit_symtab
*
4055 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4056 struct bound_minimal_symbol msymbol
,
4058 struct obj_section
*section
,
4061 struct dwarf2_per_cu_data
*data
;
4062 struct compunit_symtab
*result
;
4064 dw2_setup (objfile
);
4066 if (!objfile
->psymtabs_addrmap
)
4069 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4073 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4074 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4075 paddress (get_objfile_arch (objfile
), pc
));
4078 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4080 gdb_assert (result
!= NULL
);
4085 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4086 void *data
, int need_fullname
)
4089 struct cleanup
*cleanup
;
4090 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4091 NULL
, xcalloc
, xfree
);
4093 cleanup
= make_cleanup_htab_delete (visited
);
4094 dw2_setup (objfile
);
4096 /* The rule is CUs specify all the files, including those used by
4097 any TU, so there's no need to scan TUs here.
4098 We can ignore file names coming from already-expanded CUs. */
4100 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4102 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4104 if (per_cu
->v
.quick
->compunit_symtab
)
4106 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4109 *slot
= per_cu
->v
.quick
->file_names
;
4113 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4116 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4117 struct quick_file_names
*file_data
;
4120 /* We only need to look at symtabs not already expanded. */
4121 if (per_cu
->v
.quick
->compunit_symtab
)
4124 file_data
= dw2_get_file_names (per_cu
);
4125 if (file_data
== NULL
)
4128 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4131 /* Already visited. */
4136 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4138 const char *this_real_name
;
4141 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4143 this_real_name
= NULL
;
4144 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4148 do_cleanups (cleanup
);
4152 dw2_has_symbols (struct objfile
*objfile
)
4157 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4160 dw2_find_last_source_symtab
,
4161 dw2_forget_cached_source_info
,
4162 dw2_map_symtabs_matching_filename
,
4167 dw2_expand_symtabs_for_function
,
4168 dw2_expand_all_symtabs
,
4169 dw2_expand_symtabs_with_fullname
,
4170 dw2_map_matching_symbols
,
4171 dw2_expand_symtabs_matching
,
4172 dw2_find_pc_sect_compunit_symtab
,
4173 dw2_map_symbol_filenames
4176 /* Initialize for reading DWARF for this objfile. Return 0 if this
4177 file will use psymtabs, or 1 if using the GNU index. */
4180 dwarf2_initialize_objfile (struct objfile
*objfile
)
4182 /* If we're about to read full symbols, don't bother with the
4183 indices. In this case we also don't care if some other debug
4184 format is making psymtabs, because they are all about to be
4186 if ((objfile
->flags
& OBJF_READNOW
))
4190 dwarf2_per_objfile
->using_index
= 1;
4191 create_all_comp_units (objfile
);
4192 create_all_type_units (objfile
);
4193 dwarf2_per_objfile
->quick_file_names_table
=
4194 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4196 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4197 + dwarf2_per_objfile
->n_type_units
); ++i
)
4199 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4201 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4202 struct dwarf2_per_cu_quick_data
);
4205 /* Return 1 so that gdb sees the "quick" functions. However,
4206 these functions will be no-ops because we will have expanded
4211 if (dwarf2_read_index (objfile
))
4219 /* Build a partial symbol table. */
4222 dwarf2_build_psymtabs (struct objfile
*objfile
)
4225 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4227 init_psymbol_list (objfile
, 1024);
4232 /* This isn't really ideal: all the data we allocate on the
4233 objfile's obstack is still uselessly kept around. However,
4234 freeing it seems unsafe. */
4235 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4237 dwarf2_build_psymtabs_hard (objfile
);
4238 discard_cleanups (cleanups
);
4240 CATCH (except
, RETURN_MASK_ERROR
)
4242 exception_print (gdb_stderr
, except
);
4247 /* Return the total length of the CU described by HEADER. */
4250 get_cu_length (const struct comp_unit_head
*header
)
4252 return header
->initial_length_size
+ header
->length
;
4255 /* Return TRUE if OFFSET is within CU_HEADER. */
4258 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4260 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4261 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4263 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4266 /* Find the base address of the compilation unit for range lists and
4267 location lists. It will normally be specified by DW_AT_low_pc.
4268 In DWARF-3 draft 4, the base address could be overridden by
4269 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4270 compilation units with discontinuous ranges. */
4273 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4275 struct attribute
*attr
;
4278 cu
->base_address
= 0;
4280 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4283 cu
->base_address
= attr_value_as_address (attr
);
4288 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4291 cu
->base_address
= attr_value_as_address (attr
);
4297 /* Read in the comp unit header information from the debug_info at info_ptr.
4298 NOTE: This leaves members offset, first_die_offset to be filled in
4301 static const gdb_byte
*
4302 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4303 const gdb_byte
*info_ptr
, bfd
*abfd
)
4306 unsigned int bytes_read
;
4308 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4309 cu_header
->initial_length_size
= bytes_read
;
4310 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4311 info_ptr
+= bytes_read
;
4312 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4314 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4316 info_ptr
+= bytes_read
;
4317 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4319 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4320 if (signed_addr
< 0)
4321 internal_error (__FILE__
, __LINE__
,
4322 _("read_comp_unit_head: dwarf from non elf file"));
4323 cu_header
->signed_addr_p
= signed_addr
;
4328 /* Helper function that returns the proper abbrev section for
4331 static struct dwarf2_section_info
*
4332 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4334 struct dwarf2_section_info
*abbrev
;
4336 if (this_cu
->is_dwz
)
4337 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4339 abbrev
= &dwarf2_per_objfile
->abbrev
;
4344 /* Subroutine of read_and_check_comp_unit_head and
4345 read_and_check_type_unit_head to simplify them.
4346 Perform various error checking on the header. */
4349 error_check_comp_unit_head (struct comp_unit_head
*header
,
4350 struct dwarf2_section_info
*section
,
4351 struct dwarf2_section_info
*abbrev_section
)
4353 bfd
*abfd
= get_section_bfd_owner (section
);
4354 const char *filename
= get_section_file_name (section
);
4356 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4357 error (_("Dwarf Error: wrong version in compilation unit header "
4358 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4361 if (header
->abbrev_offset
.sect_off
4362 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4363 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4364 "(offset 0x%lx + 6) [in module %s]"),
4365 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4368 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4369 avoid potential 32-bit overflow. */
4370 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4372 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4373 "(offset 0x%lx + 0) [in module %s]"),
4374 (long) header
->length
, (long) header
->offset
.sect_off
,
4378 /* Read in a CU/TU header and perform some basic error checking.
4379 The contents of the header are stored in HEADER.
4380 The result is a pointer to the start of the first DIE. */
4382 static const gdb_byte
*
4383 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4384 struct dwarf2_section_info
*section
,
4385 struct dwarf2_section_info
*abbrev_section
,
4386 const gdb_byte
*info_ptr
,
4387 int is_debug_types_section
)
4389 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4390 bfd
*abfd
= get_section_bfd_owner (section
);
4392 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4394 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4396 /* If we're reading a type unit, skip over the signature and
4397 type_offset fields. */
4398 if (is_debug_types_section
)
4399 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4401 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4403 error_check_comp_unit_head (header
, section
, abbrev_section
);
4408 /* Read in the types comp unit header information from .debug_types entry at
4409 types_ptr. The result is a pointer to one past the end of the header. */
4411 static const gdb_byte
*
4412 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4413 struct dwarf2_section_info
*section
,
4414 struct dwarf2_section_info
*abbrev_section
,
4415 const gdb_byte
*info_ptr
,
4416 ULONGEST
*signature
,
4417 cu_offset
*type_offset_in_tu
)
4419 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4420 bfd
*abfd
= get_section_bfd_owner (section
);
4422 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4424 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4426 /* If we're reading a type unit, skip over the signature and
4427 type_offset fields. */
4428 if (signature
!= NULL
)
4429 *signature
= read_8_bytes (abfd
, info_ptr
);
4431 if (type_offset_in_tu
!= NULL
)
4432 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4433 header
->offset_size
);
4434 info_ptr
+= header
->offset_size
;
4436 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4438 error_check_comp_unit_head (header
, section
, abbrev_section
);
4443 /* Fetch the abbreviation table offset from a comp or type unit header. */
4446 read_abbrev_offset (struct dwarf2_section_info
*section
,
4449 bfd
*abfd
= get_section_bfd_owner (section
);
4450 const gdb_byte
*info_ptr
;
4451 unsigned int length
, initial_length_size
, offset_size
;
4452 sect_offset abbrev_offset
;
4454 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4455 info_ptr
= section
->buffer
+ offset
.sect_off
;
4456 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4457 offset_size
= initial_length_size
== 4 ? 4 : 8;
4458 info_ptr
+= initial_length_size
+ 2 /*version*/;
4459 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4460 return abbrev_offset
;
4463 /* Allocate a new partial symtab for file named NAME and mark this new
4464 partial symtab as being an include of PST. */
4467 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4468 struct objfile
*objfile
)
4470 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4472 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4474 /* It shares objfile->objfile_obstack. */
4475 subpst
->dirname
= pst
->dirname
;
4478 subpst
->section_offsets
= pst
->section_offsets
;
4479 subpst
->textlow
= 0;
4480 subpst
->texthigh
= 0;
4482 subpst
->dependencies
= (struct partial_symtab
**)
4483 obstack_alloc (&objfile
->objfile_obstack
,
4484 sizeof (struct partial_symtab
*));
4485 subpst
->dependencies
[0] = pst
;
4486 subpst
->number_of_dependencies
= 1;
4488 subpst
->globals_offset
= 0;
4489 subpst
->n_global_syms
= 0;
4490 subpst
->statics_offset
= 0;
4491 subpst
->n_static_syms
= 0;
4492 subpst
->compunit_symtab
= NULL
;
4493 subpst
->read_symtab
= pst
->read_symtab
;
4496 /* No private part is necessary for include psymtabs. This property
4497 can be used to differentiate between such include psymtabs and
4498 the regular ones. */
4499 subpst
->read_symtab_private
= NULL
;
4502 /* Read the Line Number Program data and extract the list of files
4503 included by the source file represented by PST. Build an include
4504 partial symtab for each of these included files. */
4507 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4508 struct die_info
*die
,
4509 struct partial_symtab
*pst
)
4511 struct line_header
*lh
= NULL
;
4512 struct attribute
*attr
;
4514 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4516 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4518 return; /* No linetable, so no includes. */
4520 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4521 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4523 free_line_header (lh
);
4527 hash_signatured_type (const void *item
)
4529 const struct signatured_type
*sig_type
= item
;
4531 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4532 return sig_type
->signature
;
4536 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4538 const struct signatured_type
*lhs
= item_lhs
;
4539 const struct signatured_type
*rhs
= item_rhs
;
4541 return lhs
->signature
== rhs
->signature
;
4544 /* Allocate a hash table for signatured types. */
4547 allocate_signatured_type_table (struct objfile
*objfile
)
4549 return htab_create_alloc_ex (41,
4550 hash_signatured_type
,
4553 &objfile
->objfile_obstack
,
4554 hashtab_obstack_allocate
,
4555 dummy_obstack_deallocate
);
4558 /* A helper function to add a signatured type CU to a table. */
4561 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4563 struct signatured_type
*sigt
= *slot
;
4564 struct signatured_type
***datap
= datum
;
4572 /* Create the hash table of all entries in the .debug_types
4573 (or .debug_types.dwo) section(s).
4574 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4575 otherwise it is NULL.
4577 The result is a pointer to the hash table or NULL if there are no types.
4579 Note: This function processes DWO files only, not DWP files. */
4582 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4583 VEC (dwarf2_section_info_def
) *types
)
4585 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4586 htab_t types_htab
= NULL
;
4588 struct dwarf2_section_info
*section
;
4589 struct dwarf2_section_info
*abbrev_section
;
4591 if (VEC_empty (dwarf2_section_info_def
, types
))
4594 abbrev_section
= (dwo_file
!= NULL
4595 ? &dwo_file
->sections
.abbrev
4596 : &dwarf2_per_objfile
->abbrev
);
4598 if (dwarf2_read_debug
)
4599 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4600 dwo_file
? ".dwo" : "",
4601 get_section_file_name (abbrev_section
));
4604 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4608 const gdb_byte
*info_ptr
, *end_ptr
;
4610 dwarf2_read_section (objfile
, section
);
4611 info_ptr
= section
->buffer
;
4613 if (info_ptr
== NULL
)
4616 /* We can't set abfd until now because the section may be empty or
4617 not present, in which case the bfd is unknown. */
4618 abfd
= get_section_bfd_owner (section
);
4620 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4621 because we don't need to read any dies: the signature is in the
4624 end_ptr
= info_ptr
+ section
->size
;
4625 while (info_ptr
< end_ptr
)
4628 cu_offset type_offset_in_tu
;
4630 struct signatured_type
*sig_type
;
4631 struct dwo_unit
*dwo_tu
;
4633 const gdb_byte
*ptr
= info_ptr
;
4634 struct comp_unit_head header
;
4635 unsigned int length
;
4637 offset
.sect_off
= ptr
- section
->buffer
;
4639 /* We need to read the type's signature in order to build the hash
4640 table, but we don't need anything else just yet. */
4642 ptr
= read_and_check_type_unit_head (&header
, section
,
4643 abbrev_section
, ptr
,
4644 &signature
, &type_offset_in_tu
);
4646 length
= get_cu_length (&header
);
4648 /* Skip dummy type units. */
4649 if (ptr
>= info_ptr
+ length
4650 || peek_abbrev_code (abfd
, ptr
) == 0)
4656 if (types_htab
== NULL
)
4659 types_htab
= allocate_dwo_unit_table (objfile
);
4661 types_htab
= allocate_signatured_type_table (objfile
);
4667 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4669 dwo_tu
->dwo_file
= dwo_file
;
4670 dwo_tu
->signature
= signature
;
4671 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4672 dwo_tu
->section
= section
;
4673 dwo_tu
->offset
= offset
;
4674 dwo_tu
->length
= length
;
4678 /* N.B.: type_offset is not usable if this type uses a DWO file.
4679 The real type_offset is in the DWO file. */
4681 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4682 struct signatured_type
);
4683 sig_type
->signature
= signature
;
4684 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4685 sig_type
->per_cu
.objfile
= objfile
;
4686 sig_type
->per_cu
.is_debug_types
= 1;
4687 sig_type
->per_cu
.section
= section
;
4688 sig_type
->per_cu
.offset
= offset
;
4689 sig_type
->per_cu
.length
= length
;
4692 slot
= htab_find_slot (types_htab
,
4693 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4695 gdb_assert (slot
!= NULL
);
4698 sect_offset dup_offset
;
4702 const struct dwo_unit
*dup_tu
= *slot
;
4704 dup_offset
= dup_tu
->offset
;
4708 const struct signatured_type
*dup_tu
= *slot
;
4710 dup_offset
= dup_tu
->per_cu
.offset
;
4713 complaint (&symfile_complaints
,
4714 _("debug type entry at offset 0x%x is duplicate to"
4715 " the entry at offset 0x%x, signature %s"),
4716 offset
.sect_off
, dup_offset
.sect_off
,
4717 hex_string (signature
));
4719 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4721 if (dwarf2_read_debug
> 1)
4722 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4724 hex_string (signature
));
4733 /* Create the hash table of all entries in the .debug_types section,
4734 and initialize all_type_units.
4735 The result is zero if there is an error (e.g. missing .debug_types section),
4736 otherwise non-zero. */
4739 create_all_type_units (struct objfile
*objfile
)
4742 struct signatured_type
**iter
;
4744 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4745 if (types_htab
== NULL
)
4747 dwarf2_per_objfile
->signatured_types
= NULL
;
4751 dwarf2_per_objfile
->signatured_types
= types_htab
;
4753 dwarf2_per_objfile
->n_type_units
4754 = dwarf2_per_objfile
->n_allocated_type_units
4755 = htab_elements (types_htab
);
4756 dwarf2_per_objfile
->all_type_units
4757 = xmalloc (dwarf2_per_objfile
->n_type_units
4758 * sizeof (struct signatured_type
*));
4759 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4760 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4761 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4762 == dwarf2_per_objfile
->n_type_units
);
4767 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4768 If SLOT is non-NULL, it is the entry to use in the hash table.
4769 Otherwise we find one. */
4771 static struct signatured_type
*
4772 add_type_unit (ULONGEST sig
, void **slot
)
4774 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4775 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4776 struct signatured_type
*sig_type
;
4778 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4780 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4782 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4783 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4784 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4785 dwarf2_per_objfile
->all_type_units
4786 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4787 dwarf2_per_objfile
->n_allocated_type_units
4788 * sizeof (struct signatured_type
*));
4789 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4791 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4793 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4794 struct signatured_type
);
4795 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4796 sig_type
->signature
= sig
;
4797 sig_type
->per_cu
.is_debug_types
= 1;
4798 if (dwarf2_per_objfile
->using_index
)
4800 sig_type
->per_cu
.v
.quick
=
4801 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4802 struct dwarf2_per_cu_quick_data
);
4807 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4810 gdb_assert (*slot
== NULL
);
4812 /* The rest of sig_type must be filled in by the caller. */
4816 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4817 Fill in SIG_ENTRY with DWO_ENTRY. */
4820 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4821 struct signatured_type
*sig_entry
,
4822 struct dwo_unit
*dwo_entry
)
4824 /* Make sure we're not clobbering something we don't expect to. */
4825 gdb_assert (! sig_entry
->per_cu
.queued
);
4826 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4827 if (dwarf2_per_objfile
->using_index
)
4829 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4830 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4833 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4834 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4835 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4836 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4837 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4839 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4840 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4841 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4842 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4843 sig_entry
->per_cu
.objfile
= objfile
;
4844 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4845 sig_entry
->dwo_unit
= dwo_entry
;
4848 /* Subroutine of lookup_signatured_type.
4849 If we haven't read the TU yet, create the signatured_type data structure
4850 for a TU to be read in directly from a DWO file, bypassing the stub.
4851 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4852 using .gdb_index, then when reading a CU we want to stay in the DWO file
4853 containing that CU. Otherwise we could end up reading several other DWO
4854 files (due to comdat folding) to process the transitive closure of all the
4855 mentioned TUs, and that can be slow. The current DWO file will have every
4856 type signature that it needs.
4857 We only do this for .gdb_index because in the psymtab case we already have
4858 to read all the DWOs to build the type unit groups. */
4860 static struct signatured_type
*
4861 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4863 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4864 struct dwo_file
*dwo_file
;
4865 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4866 struct signatured_type find_sig_entry
, *sig_entry
;
4869 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4871 /* If TU skeletons have been removed then we may not have read in any
4873 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4875 dwarf2_per_objfile
->signatured_types
4876 = allocate_signatured_type_table (objfile
);
4879 /* We only ever need to read in one copy of a signatured type.
4880 Use the global signatured_types array to do our own comdat-folding
4881 of types. If this is the first time we're reading this TU, and
4882 the TU has an entry in .gdb_index, replace the recorded data from
4883 .gdb_index with this TU. */
4885 find_sig_entry
.signature
= sig
;
4886 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4887 &find_sig_entry
, INSERT
);
4890 /* We can get here with the TU already read, *or* in the process of being
4891 read. Don't reassign the global entry to point to this DWO if that's
4892 the case. Also note that if the TU is already being read, it may not
4893 have come from a DWO, the program may be a mix of Fission-compiled
4894 code and non-Fission-compiled code. */
4896 /* Have we already tried to read this TU?
4897 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4898 needn't exist in the global table yet). */
4899 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4902 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4903 dwo_unit of the TU itself. */
4904 dwo_file
= cu
->dwo_unit
->dwo_file
;
4906 /* Ok, this is the first time we're reading this TU. */
4907 if (dwo_file
->tus
== NULL
)
4909 find_dwo_entry
.signature
= sig
;
4910 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4911 if (dwo_entry
== NULL
)
4914 /* If the global table doesn't have an entry for this TU, add one. */
4915 if (sig_entry
== NULL
)
4916 sig_entry
= add_type_unit (sig
, slot
);
4918 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4919 sig_entry
->per_cu
.tu_read
= 1;
4923 /* Subroutine of lookup_signatured_type.
4924 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4925 then try the DWP file. If the TU stub (skeleton) has been removed then
4926 it won't be in .gdb_index. */
4928 static struct signatured_type
*
4929 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4931 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4932 struct dwp_file
*dwp_file
= get_dwp_file ();
4933 struct dwo_unit
*dwo_entry
;
4934 struct signatured_type find_sig_entry
, *sig_entry
;
4937 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4938 gdb_assert (dwp_file
!= NULL
);
4940 /* If TU skeletons have been removed then we may not have read in any
4942 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4944 dwarf2_per_objfile
->signatured_types
4945 = allocate_signatured_type_table (objfile
);
4948 find_sig_entry
.signature
= sig
;
4949 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4950 &find_sig_entry
, INSERT
);
4953 /* Have we already tried to read this TU?
4954 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4955 needn't exist in the global table yet). */
4956 if (sig_entry
!= NULL
)
4959 if (dwp_file
->tus
== NULL
)
4961 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4962 sig
, 1 /* is_debug_types */);
4963 if (dwo_entry
== NULL
)
4966 sig_entry
= add_type_unit (sig
, slot
);
4967 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4972 /* Lookup a signature based type for DW_FORM_ref_sig8.
4973 Returns NULL if signature SIG is not present in the table.
4974 It is up to the caller to complain about this. */
4976 static struct signatured_type
*
4977 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4980 && dwarf2_per_objfile
->using_index
)
4982 /* We're in a DWO/DWP file, and we're using .gdb_index.
4983 These cases require special processing. */
4984 if (get_dwp_file () == NULL
)
4985 return lookup_dwo_signatured_type (cu
, sig
);
4987 return lookup_dwp_signatured_type (cu
, sig
);
4991 struct signatured_type find_entry
, *entry
;
4993 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4995 find_entry
.signature
= sig
;
4996 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
5001 /* Low level DIE reading support. */
5003 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5006 init_cu_die_reader (struct die_reader_specs
*reader
,
5007 struct dwarf2_cu
*cu
,
5008 struct dwarf2_section_info
*section
,
5009 struct dwo_file
*dwo_file
)
5011 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5012 reader
->abfd
= get_section_bfd_owner (section
);
5014 reader
->dwo_file
= dwo_file
;
5015 reader
->die_section
= section
;
5016 reader
->buffer
= section
->buffer
;
5017 reader
->buffer_end
= section
->buffer
+ section
->size
;
5018 reader
->comp_dir
= NULL
;
5021 /* Subroutine of init_cutu_and_read_dies to simplify it.
5022 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5023 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5026 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5027 from it to the DIE in the DWO. If NULL we are skipping the stub.
5028 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5029 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5030 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5031 STUB_COMP_DIR may be non-NULL.
5032 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5033 are filled in with the info of the DIE from the DWO file.
5034 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5035 provided an abbrev table to use.
5036 The result is non-zero if a valid (non-dummy) DIE was found. */
5039 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5040 struct dwo_unit
*dwo_unit
,
5041 int abbrev_table_provided
,
5042 struct die_info
*stub_comp_unit_die
,
5043 const char *stub_comp_dir
,
5044 struct die_reader_specs
*result_reader
,
5045 const gdb_byte
**result_info_ptr
,
5046 struct die_info
**result_comp_unit_die
,
5047 int *result_has_children
)
5049 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5050 struct dwarf2_cu
*cu
= this_cu
->cu
;
5051 struct dwarf2_section_info
*section
;
5053 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5054 ULONGEST signature
; /* Or dwo_id. */
5055 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5056 int i
,num_extra_attrs
;
5057 struct dwarf2_section_info
*dwo_abbrev_section
;
5058 struct attribute
*attr
;
5059 struct die_info
*comp_unit_die
;
5061 /* At most one of these may be provided. */
5062 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5064 /* These attributes aren't processed until later:
5065 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5066 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5067 referenced later. However, these attributes are found in the stub
5068 which we won't have later. In order to not impose this complication
5069 on the rest of the code, we read them here and copy them to the
5078 if (stub_comp_unit_die
!= NULL
)
5080 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5082 if (! this_cu
->is_debug_types
)
5083 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5084 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5085 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5086 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5087 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5089 /* There should be a DW_AT_addr_base attribute here (if needed).
5090 We need the value before we can process DW_FORM_GNU_addr_index. */
5092 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5094 cu
->addr_base
= DW_UNSND (attr
);
5096 /* There should be a DW_AT_ranges_base attribute here (if needed).
5097 We need the value before we can process DW_AT_ranges. */
5098 cu
->ranges_base
= 0;
5099 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5101 cu
->ranges_base
= DW_UNSND (attr
);
5103 else if (stub_comp_dir
!= NULL
)
5105 /* Reconstruct the comp_dir attribute to simplify the code below. */
5106 comp_dir
= (struct attribute
*)
5107 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5108 comp_dir
->name
= DW_AT_comp_dir
;
5109 comp_dir
->form
= DW_FORM_string
;
5110 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5111 DW_STRING (comp_dir
) = stub_comp_dir
;
5114 /* Set up for reading the DWO CU/TU. */
5115 cu
->dwo_unit
= dwo_unit
;
5116 section
= dwo_unit
->section
;
5117 dwarf2_read_section (objfile
, section
);
5118 abfd
= get_section_bfd_owner (section
);
5119 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5120 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5121 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5123 if (this_cu
->is_debug_types
)
5125 ULONGEST header_signature
;
5126 cu_offset type_offset_in_tu
;
5127 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5129 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5133 &type_offset_in_tu
);
5134 /* This is not an assert because it can be caused by bad debug info. */
5135 if (sig_type
->signature
!= header_signature
)
5137 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5138 " TU at offset 0x%x [in module %s]"),
5139 hex_string (sig_type
->signature
),
5140 hex_string (header_signature
),
5141 dwo_unit
->offset
.sect_off
,
5142 bfd_get_filename (abfd
));
5144 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5145 /* For DWOs coming from DWP files, we don't know the CU length
5146 nor the type's offset in the TU until now. */
5147 dwo_unit
->length
= get_cu_length (&cu
->header
);
5148 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5150 /* Establish the type offset that can be used to lookup the type.
5151 For DWO files, we don't know it until now. */
5152 sig_type
->type_offset_in_section
.sect_off
=
5153 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5157 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5160 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5161 /* For DWOs coming from DWP files, we don't know the CU length
5163 dwo_unit
->length
= get_cu_length (&cu
->header
);
5166 /* Replace the CU's original abbrev table with the DWO's.
5167 Reminder: We can't read the abbrev table until we've read the header. */
5168 if (abbrev_table_provided
)
5170 /* Don't free the provided abbrev table, the caller of
5171 init_cutu_and_read_dies owns it. */
5172 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5173 /* Ensure the DWO abbrev table gets freed. */
5174 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5178 dwarf2_free_abbrev_table (cu
);
5179 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5180 /* Leave any existing abbrev table cleanup as is. */
5183 /* Read in the die, but leave space to copy over the attributes
5184 from the stub. This has the benefit of simplifying the rest of
5185 the code - all the work to maintain the illusion of a single
5186 DW_TAG_{compile,type}_unit DIE is done here. */
5187 num_extra_attrs
= ((stmt_list
!= NULL
)
5191 + (comp_dir
!= NULL
));
5192 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5193 result_has_children
, num_extra_attrs
);
5195 /* Copy over the attributes from the stub to the DIE we just read in. */
5196 comp_unit_die
= *result_comp_unit_die
;
5197 i
= comp_unit_die
->num_attrs
;
5198 if (stmt_list
!= NULL
)
5199 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5201 comp_unit_die
->attrs
[i
++] = *low_pc
;
5202 if (high_pc
!= NULL
)
5203 comp_unit_die
->attrs
[i
++] = *high_pc
;
5205 comp_unit_die
->attrs
[i
++] = *ranges
;
5206 if (comp_dir
!= NULL
)
5207 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5208 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5210 if (dwarf2_die_debug
)
5212 fprintf_unfiltered (gdb_stdlog
,
5213 "Read die from %s@0x%x of %s:\n",
5214 get_section_name (section
),
5215 (unsigned) (begin_info_ptr
- section
->buffer
),
5216 bfd_get_filename (abfd
));
5217 dump_die (comp_unit_die
, dwarf2_die_debug
);
5220 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5221 TUs by skipping the stub and going directly to the entry in the DWO file.
5222 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5223 to get it via circuitous means. Blech. */
5224 if (comp_dir
!= NULL
)
5225 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5227 /* Skip dummy compilation units. */
5228 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5229 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5232 *result_info_ptr
= info_ptr
;
5236 /* Subroutine of init_cutu_and_read_dies to simplify it.
5237 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5238 Returns NULL if the specified DWO unit cannot be found. */
5240 static struct dwo_unit
*
5241 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5242 struct die_info
*comp_unit_die
)
5244 struct dwarf2_cu
*cu
= this_cu
->cu
;
5245 struct attribute
*attr
;
5247 struct dwo_unit
*dwo_unit
;
5248 const char *comp_dir
, *dwo_name
;
5250 gdb_assert (cu
!= NULL
);
5252 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5253 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5254 gdb_assert (attr
!= NULL
);
5255 dwo_name
= DW_STRING (attr
);
5257 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5259 comp_dir
= DW_STRING (attr
);
5261 if (this_cu
->is_debug_types
)
5263 struct signatured_type
*sig_type
;
5265 /* Since this_cu is the first member of struct signatured_type,
5266 we can go from a pointer to one to a pointer to the other. */
5267 sig_type
= (struct signatured_type
*) this_cu
;
5268 signature
= sig_type
->signature
;
5269 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5273 struct attribute
*attr
;
5275 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5277 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5279 dwo_name
, objfile_name (this_cu
->objfile
));
5280 signature
= DW_UNSND (attr
);
5281 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5288 /* Subroutine of init_cutu_and_read_dies to simplify it.
5289 See it for a description of the parameters.
5290 Read a TU directly from a DWO file, bypassing the stub.
5292 Note: This function could be a little bit simpler if we shared cleanups
5293 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5294 to do, so we keep this function self-contained. Or we could move this
5295 into our caller, but it's complex enough already. */
5298 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5299 int use_existing_cu
, int keep
,
5300 die_reader_func_ftype
*die_reader_func
,
5303 struct dwarf2_cu
*cu
;
5304 struct signatured_type
*sig_type
;
5305 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5306 struct die_reader_specs reader
;
5307 const gdb_byte
*info_ptr
;
5308 struct die_info
*comp_unit_die
;
5311 /* Verify we can do the following downcast, and that we have the
5313 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5314 sig_type
= (struct signatured_type
*) this_cu
;
5315 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5317 cleanups
= make_cleanup (null_cleanup
, NULL
);
5319 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5321 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5323 /* There's no need to do the rereading_dwo_cu handling that
5324 init_cutu_and_read_dies does since we don't read the stub. */
5328 /* If !use_existing_cu, this_cu->cu must be NULL. */
5329 gdb_assert (this_cu
->cu
== NULL
);
5330 cu
= xmalloc (sizeof (*cu
));
5331 init_one_comp_unit (cu
, this_cu
);
5332 /* If an error occurs while loading, release our storage. */
5333 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5336 /* A future optimization, if needed, would be to use an existing
5337 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5338 could share abbrev tables. */
5340 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5341 0 /* abbrev_table_provided */,
5342 NULL
/* stub_comp_unit_die */,
5343 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5345 &comp_unit_die
, &has_children
) == 0)
5348 do_cleanups (cleanups
);
5352 /* All the "real" work is done here. */
5353 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5355 /* This duplicates the code in init_cutu_and_read_dies,
5356 but the alternative is making the latter more complex.
5357 This function is only for the special case of using DWO files directly:
5358 no point in overly complicating the general case just to handle this. */
5359 if (free_cu_cleanup
!= NULL
)
5363 /* We've successfully allocated this compilation unit. Let our
5364 caller clean it up when finished with it. */
5365 discard_cleanups (free_cu_cleanup
);
5367 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5368 So we have to manually free the abbrev table. */
5369 dwarf2_free_abbrev_table (cu
);
5371 /* Link this CU into read_in_chain. */
5372 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5373 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5376 do_cleanups (free_cu_cleanup
);
5379 do_cleanups (cleanups
);
5382 /* Initialize a CU (or TU) and read its DIEs.
5383 If the CU defers to a DWO file, read the DWO file as well.
5385 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5386 Otherwise the table specified in the comp unit header is read in and used.
5387 This is an optimization for when we already have the abbrev table.
5389 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5390 Otherwise, a new CU is allocated with xmalloc.
5392 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5393 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5395 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5396 linker) then DIE_READER_FUNC will not get called. */
5399 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5400 struct abbrev_table
*abbrev_table
,
5401 int use_existing_cu
, int keep
,
5402 die_reader_func_ftype
*die_reader_func
,
5405 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5406 struct dwarf2_section_info
*section
= this_cu
->section
;
5407 bfd
*abfd
= get_section_bfd_owner (section
);
5408 struct dwarf2_cu
*cu
;
5409 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5410 struct die_reader_specs reader
;
5411 struct die_info
*comp_unit_die
;
5413 struct attribute
*attr
;
5414 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5415 struct signatured_type
*sig_type
= NULL
;
5416 struct dwarf2_section_info
*abbrev_section
;
5417 /* Non-zero if CU currently points to a DWO file and we need to
5418 reread it. When this happens we need to reread the skeleton die
5419 before we can reread the DWO file (this only applies to CUs, not TUs). */
5420 int rereading_dwo_cu
= 0;
5422 if (dwarf2_die_debug
)
5423 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5424 this_cu
->is_debug_types
? "type" : "comp",
5425 this_cu
->offset
.sect_off
);
5427 if (use_existing_cu
)
5430 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5431 file (instead of going through the stub), short-circuit all of this. */
5432 if (this_cu
->reading_dwo_directly
)
5434 /* Narrow down the scope of possibilities to have to understand. */
5435 gdb_assert (this_cu
->is_debug_types
);
5436 gdb_assert (abbrev_table
== NULL
);
5437 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5438 die_reader_func
, data
);
5442 cleanups
= make_cleanup (null_cleanup
, NULL
);
5444 /* This is cheap if the section is already read in. */
5445 dwarf2_read_section (objfile
, section
);
5447 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5449 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5451 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5454 /* If this CU is from a DWO file we need to start over, we need to
5455 refetch the attributes from the skeleton CU.
5456 This could be optimized by retrieving those attributes from when we
5457 were here the first time: the previous comp_unit_die was stored in
5458 comp_unit_obstack. But there's no data yet that we need this
5460 if (cu
->dwo_unit
!= NULL
)
5461 rereading_dwo_cu
= 1;
5465 /* If !use_existing_cu, this_cu->cu must be NULL. */
5466 gdb_assert (this_cu
->cu
== NULL
);
5467 cu
= xmalloc (sizeof (*cu
));
5468 init_one_comp_unit (cu
, this_cu
);
5469 /* If an error occurs while loading, release our storage. */
5470 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5473 /* Get the header. */
5474 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5476 /* We already have the header, there's no need to read it in again. */
5477 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5481 if (this_cu
->is_debug_types
)
5484 cu_offset type_offset_in_tu
;
5486 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5487 abbrev_section
, info_ptr
,
5489 &type_offset_in_tu
);
5491 /* Since per_cu is the first member of struct signatured_type,
5492 we can go from a pointer to one to a pointer to the other. */
5493 sig_type
= (struct signatured_type
*) this_cu
;
5494 gdb_assert (sig_type
->signature
== signature
);
5495 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5496 == type_offset_in_tu
.cu_off
);
5497 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5499 /* LENGTH has not been set yet for type units if we're
5500 using .gdb_index. */
5501 this_cu
->length
= get_cu_length (&cu
->header
);
5503 /* Establish the type offset that can be used to lookup the type. */
5504 sig_type
->type_offset_in_section
.sect_off
=
5505 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5509 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5513 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5514 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5518 /* Skip dummy compilation units. */
5519 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5520 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5522 do_cleanups (cleanups
);
5526 /* If we don't have them yet, read the abbrevs for this compilation unit.
5527 And if we need to read them now, make sure they're freed when we're
5528 done. Note that it's important that if the CU had an abbrev table
5529 on entry we don't free it when we're done: Somewhere up the call stack
5530 it may be in use. */
5531 if (abbrev_table
!= NULL
)
5533 gdb_assert (cu
->abbrev_table
== NULL
);
5534 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5535 == abbrev_table
->offset
.sect_off
);
5536 cu
->abbrev_table
= abbrev_table
;
5538 else if (cu
->abbrev_table
== NULL
)
5540 dwarf2_read_abbrevs (cu
, abbrev_section
);
5541 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5543 else if (rereading_dwo_cu
)
5545 dwarf2_free_abbrev_table (cu
);
5546 dwarf2_read_abbrevs (cu
, abbrev_section
);
5549 /* Read the top level CU/TU die. */
5550 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5551 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5553 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5555 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5556 DWO CU, that this test will fail (the attribute will not be present). */
5557 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5560 struct dwo_unit
*dwo_unit
;
5561 struct die_info
*dwo_comp_unit_die
;
5565 complaint (&symfile_complaints
,
5566 _("compilation unit with DW_AT_GNU_dwo_name"
5567 " has children (offset 0x%x) [in module %s]"),
5568 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5570 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5571 if (dwo_unit
!= NULL
)
5573 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5574 abbrev_table
!= NULL
,
5575 comp_unit_die
, NULL
,
5577 &dwo_comp_unit_die
, &has_children
) == 0)
5580 do_cleanups (cleanups
);
5583 comp_unit_die
= dwo_comp_unit_die
;
5587 /* Yikes, we couldn't find the rest of the DIE, we only have
5588 the stub. A complaint has already been logged. There's
5589 not much more we can do except pass on the stub DIE to
5590 die_reader_func. We don't want to throw an error on bad
5595 /* All of the above is setup for this call. Yikes. */
5596 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5598 /* Done, clean up. */
5599 if (free_cu_cleanup
!= NULL
)
5603 /* We've successfully allocated this compilation unit. Let our
5604 caller clean it up when finished with it. */
5605 discard_cleanups (free_cu_cleanup
);
5607 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5608 So we have to manually free the abbrev table. */
5609 dwarf2_free_abbrev_table (cu
);
5611 /* Link this CU into read_in_chain. */
5612 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5613 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5616 do_cleanups (free_cu_cleanup
);
5619 do_cleanups (cleanups
);
5622 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5623 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5624 to have already done the lookup to find the DWO file).
5626 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5627 THIS_CU->is_debug_types, but nothing else.
5629 We fill in THIS_CU->length.
5631 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5632 linker) then DIE_READER_FUNC will not get called.
5634 THIS_CU->cu is always freed when done.
5635 This is done in order to not leave THIS_CU->cu in a state where we have
5636 to care whether it refers to the "main" CU or the DWO CU. */
5639 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5640 struct dwo_file
*dwo_file
,
5641 die_reader_func_ftype
*die_reader_func
,
5644 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5645 struct dwarf2_section_info
*section
= this_cu
->section
;
5646 bfd
*abfd
= get_section_bfd_owner (section
);
5647 struct dwarf2_section_info
*abbrev_section
;
5648 struct dwarf2_cu cu
;
5649 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5650 struct die_reader_specs reader
;
5651 struct cleanup
*cleanups
;
5652 struct die_info
*comp_unit_die
;
5655 if (dwarf2_die_debug
)
5656 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5657 this_cu
->is_debug_types
? "type" : "comp",
5658 this_cu
->offset
.sect_off
);
5660 gdb_assert (this_cu
->cu
== NULL
);
5662 abbrev_section
= (dwo_file
!= NULL
5663 ? &dwo_file
->sections
.abbrev
5664 : get_abbrev_section_for_cu (this_cu
));
5666 /* This is cheap if the section is already read in. */
5667 dwarf2_read_section (objfile
, section
);
5669 init_one_comp_unit (&cu
, this_cu
);
5671 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5673 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5674 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5675 abbrev_section
, info_ptr
,
5676 this_cu
->is_debug_types
);
5678 this_cu
->length
= get_cu_length (&cu
.header
);
5680 /* Skip dummy compilation units. */
5681 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5682 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5684 do_cleanups (cleanups
);
5688 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5689 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5691 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5692 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5694 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5696 do_cleanups (cleanups
);
5699 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5700 does not lookup the specified DWO file.
5701 This cannot be used to read DWO files.
5703 THIS_CU->cu is always freed when done.
5704 This is done in order to not leave THIS_CU->cu in a state where we have
5705 to care whether it refers to the "main" CU or the DWO CU.
5706 We can revisit this if the data shows there's a performance issue. */
5709 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5710 die_reader_func_ftype
*die_reader_func
,
5713 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5716 /* Type Unit Groups.
5718 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5719 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5720 so that all types coming from the same compilation (.o file) are grouped
5721 together. A future step could be to put the types in the same symtab as
5722 the CU the types ultimately came from. */
5725 hash_type_unit_group (const void *item
)
5727 const struct type_unit_group
*tu_group
= item
;
5729 return hash_stmt_list_entry (&tu_group
->hash
);
5733 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5735 const struct type_unit_group
*lhs
= item_lhs
;
5736 const struct type_unit_group
*rhs
= item_rhs
;
5738 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5741 /* Allocate a hash table for type unit groups. */
5744 allocate_type_unit_groups_table (void)
5746 return htab_create_alloc_ex (3,
5747 hash_type_unit_group
,
5750 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5751 hashtab_obstack_allocate
,
5752 dummy_obstack_deallocate
);
5755 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5756 partial symtabs. We combine several TUs per psymtab to not let the size
5757 of any one psymtab grow too big. */
5758 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5759 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5761 /* Helper routine for get_type_unit_group.
5762 Create the type_unit_group object used to hold one or more TUs. */
5764 static struct type_unit_group
*
5765 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5767 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5768 struct dwarf2_per_cu_data
*per_cu
;
5769 struct type_unit_group
*tu_group
;
5771 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5772 struct type_unit_group
);
5773 per_cu
= &tu_group
->per_cu
;
5774 per_cu
->objfile
= objfile
;
5776 if (dwarf2_per_objfile
->using_index
)
5778 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5779 struct dwarf2_per_cu_quick_data
);
5783 unsigned int line_offset
= line_offset_struct
.sect_off
;
5784 struct partial_symtab
*pst
;
5787 /* Give the symtab a useful name for debug purposes. */
5788 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5789 name
= xstrprintf ("<type_units_%d>",
5790 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5792 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5794 pst
= create_partial_symtab (per_cu
, name
);
5800 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5801 tu_group
->hash
.line_offset
= line_offset_struct
;
5806 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5807 STMT_LIST is a DW_AT_stmt_list attribute. */
5809 static struct type_unit_group
*
5810 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5812 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5813 struct type_unit_group
*tu_group
;
5815 unsigned int line_offset
;
5816 struct type_unit_group type_unit_group_for_lookup
;
5818 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5820 dwarf2_per_objfile
->type_unit_groups
=
5821 allocate_type_unit_groups_table ();
5824 /* Do we need to create a new group, or can we use an existing one? */
5828 line_offset
= DW_UNSND (stmt_list
);
5829 ++tu_stats
->nr_symtab_sharers
;
5833 /* Ugh, no stmt_list. Rare, but we have to handle it.
5834 We can do various things here like create one group per TU or
5835 spread them over multiple groups to split up the expansion work.
5836 To avoid worst case scenarios (too many groups or too large groups)
5837 we, umm, group them in bunches. */
5838 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5839 | (tu_stats
->nr_stmt_less_type_units
5840 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5841 ++tu_stats
->nr_stmt_less_type_units
;
5844 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5845 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5846 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5847 &type_unit_group_for_lookup
, INSERT
);
5851 gdb_assert (tu_group
!= NULL
);
5855 sect_offset line_offset_struct
;
5857 line_offset_struct
.sect_off
= line_offset
;
5858 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5860 ++tu_stats
->nr_symtabs
;
5866 /* Partial symbol tables. */
5868 /* Create a psymtab named NAME and assign it to PER_CU.
5870 The caller must fill in the following details:
5871 dirname, textlow, texthigh. */
5873 static struct partial_symtab
*
5874 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5876 struct objfile
*objfile
= per_cu
->objfile
;
5877 struct partial_symtab
*pst
;
5879 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5881 objfile
->global_psymbols
.next
,
5882 objfile
->static_psymbols
.next
);
5884 pst
->psymtabs_addrmap_supported
= 1;
5886 /* This is the glue that links PST into GDB's symbol API. */
5887 pst
->read_symtab_private
= per_cu
;
5888 pst
->read_symtab
= dwarf2_read_symtab
;
5889 per_cu
->v
.psymtab
= pst
;
5894 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5897 struct process_psymtab_comp_unit_data
5899 /* True if we are reading a DW_TAG_partial_unit. */
5901 int want_partial_unit
;
5903 /* The "pretend" language that is used if the CU doesn't declare a
5906 enum language pretend_language
;
5909 /* die_reader_func for process_psymtab_comp_unit. */
5912 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5913 const gdb_byte
*info_ptr
,
5914 struct die_info
*comp_unit_die
,
5918 struct dwarf2_cu
*cu
= reader
->cu
;
5919 struct objfile
*objfile
= cu
->objfile
;
5920 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5921 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5922 struct attribute
*attr
;
5924 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5925 struct partial_symtab
*pst
;
5927 const char *filename
;
5928 struct process_psymtab_comp_unit_data
*info
= data
;
5930 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5933 gdb_assert (! per_cu
->is_debug_types
);
5935 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5937 cu
->list_in_scope
= &file_symbols
;
5939 /* Allocate a new partial symbol table structure. */
5940 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5941 if (attr
== NULL
|| !DW_STRING (attr
))
5944 filename
= DW_STRING (attr
);
5946 pst
= create_partial_symtab (per_cu
, filename
);
5948 /* This must be done before calling dwarf2_build_include_psymtabs. */
5949 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5951 pst
->dirname
= DW_STRING (attr
);
5953 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5955 dwarf2_find_base_address (comp_unit_die
, cu
);
5957 /* Possibly set the default values of LOWPC and HIGHPC from
5959 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5960 &best_highpc
, cu
, pst
);
5961 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5962 /* Store the contiguous range if it is not empty; it can be empty for
5963 CUs with no code. */
5964 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5965 gdbarch_adjust_dwarf2_addr (gdbarch
,
5966 best_lowpc
+ baseaddr
),
5967 gdbarch_adjust_dwarf2_addr (gdbarch
,
5968 best_highpc
+ baseaddr
) - 1,
5971 /* Check if comp unit has_children.
5972 If so, read the rest of the partial symbols from this comp unit.
5973 If not, there's no more debug_info for this comp unit. */
5976 struct partial_die_info
*first_die
;
5977 CORE_ADDR lowpc
, highpc
;
5979 lowpc
= ((CORE_ADDR
) -1);
5980 highpc
= ((CORE_ADDR
) 0);
5982 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5984 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5987 /* If we didn't find a lowpc, set it to highpc to avoid
5988 complaints from `maint check'. */
5989 if (lowpc
== ((CORE_ADDR
) -1))
5992 /* If the compilation unit didn't have an explicit address range,
5993 then use the information extracted from its child dies. */
5997 best_highpc
= highpc
;
6000 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6001 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6003 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6004 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6005 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6006 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6007 sort_pst_symbols (objfile
, pst
);
6009 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6012 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6013 struct dwarf2_per_cu_data
*iter
;
6015 /* Fill in 'dependencies' here; we fill in 'users' in a
6017 pst
->number_of_dependencies
= len
;
6018 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6019 len
* sizeof (struct symtab
*));
6021 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6024 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6026 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6029 /* Get the list of files included in the current compilation unit,
6030 and build a psymtab for each of them. */
6031 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6033 if (dwarf2_read_debug
)
6035 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6037 fprintf_unfiltered (gdb_stdlog
,
6038 "Psymtab for %s unit @0x%x: %s - %s"
6039 ", %d global, %d static syms\n",
6040 per_cu
->is_debug_types
? "type" : "comp",
6041 per_cu
->offset
.sect_off
,
6042 paddress (gdbarch
, pst
->textlow
),
6043 paddress (gdbarch
, pst
->texthigh
),
6044 pst
->n_global_syms
, pst
->n_static_syms
);
6048 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6049 Process compilation unit THIS_CU for a psymtab. */
6052 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6053 int want_partial_unit
,
6054 enum language pretend_language
)
6056 struct process_psymtab_comp_unit_data info
;
6058 /* If this compilation unit was already read in, free the
6059 cached copy in order to read it in again. This is
6060 necessary because we skipped some symbols when we first
6061 read in the compilation unit (see load_partial_dies).
6062 This problem could be avoided, but the benefit is unclear. */
6063 if (this_cu
->cu
!= NULL
)
6064 free_one_cached_comp_unit (this_cu
);
6066 gdb_assert (! this_cu
->is_debug_types
);
6067 info
.want_partial_unit
= want_partial_unit
;
6068 info
.pretend_language
= pretend_language
;
6069 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6070 process_psymtab_comp_unit_reader
,
6073 /* Age out any secondary CUs. */
6074 age_cached_comp_units ();
6077 /* Reader function for build_type_psymtabs. */
6080 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6081 const gdb_byte
*info_ptr
,
6082 struct die_info
*type_unit_die
,
6086 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6087 struct dwarf2_cu
*cu
= reader
->cu
;
6088 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6089 struct signatured_type
*sig_type
;
6090 struct type_unit_group
*tu_group
;
6091 struct attribute
*attr
;
6092 struct partial_die_info
*first_die
;
6093 CORE_ADDR lowpc
, highpc
;
6094 struct partial_symtab
*pst
;
6096 gdb_assert (data
== NULL
);
6097 gdb_assert (per_cu
->is_debug_types
);
6098 sig_type
= (struct signatured_type
*) per_cu
;
6103 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6104 tu_group
= get_type_unit_group (cu
, attr
);
6106 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6108 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6109 cu
->list_in_scope
= &file_symbols
;
6110 pst
= create_partial_symtab (per_cu
, "");
6113 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6115 lowpc
= (CORE_ADDR
) -1;
6116 highpc
= (CORE_ADDR
) 0;
6117 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6119 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6120 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6121 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6122 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6123 sort_pst_symbols (objfile
, pst
);
6126 /* Struct used to sort TUs by their abbreviation table offset. */
6128 struct tu_abbrev_offset
6130 struct signatured_type
*sig_type
;
6131 sect_offset abbrev_offset
;
6134 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6137 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6139 const struct tu_abbrev_offset
* const *a
= ap
;
6140 const struct tu_abbrev_offset
* const *b
= bp
;
6141 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6142 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6144 return (aoff
> boff
) - (aoff
< boff
);
6147 /* Efficiently read all the type units.
6148 This does the bulk of the work for build_type_psymtabs.
6150 The efficiency is because we sort TUs by the abbrev table they use and
6151 only read each abbrev table once. In one program there are 200K TUs
6152 sharing 8K abbrev tables.
6154 The main purpose of this function is to support building the
6155 dwarf2_per_objfile->type_unit_groups table.
6156 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6157 can collapse the search space by grouping them by stmt_list.
6158 The savings can be significant, in the same program from above the 200K TUs
6159 share 8K stmt_list tables.
6161 FUNC is expected to call get_type_unit_group, which will create the
6162 struct type_unit_group if necessary and add it to
6163 dwarf2_per_objfile->type_unit_groups. */
6166 build_type_psymtabs_1 (void)
6168 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6169 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6170 struct cleanup
*cleanups
;
6171 struct abbrev_table
*abbrev_table
;
6172 sect_offset abbrev_offset
;
6173 struct tu_abbrev_offset
*sorted_by_abbrev
;
6174 struct type_unit_group
**iter
;
6177 /* It's up to the caller to not call us multiple times. */
6178 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6180 if (dwarf2_per_objfile
->n_type_units
== 0)
6183 /* TUs typically share abbrev tables, and there can be way more TUs than
6184 abbrev tables. Sort by abbrev table to reduce the number of times we
6185 read each abbrev table in.
6186 Alternatives are to punt or to maintain a cache of abbrev tables.
6187 This is simpler and efficient enough for now.
6189 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6190 symtab to use). Typically TUs with the same abbrev offset have the same
6191 stmt_list value too so in practice this should work well.
6193 The basic algorithm here is:
6195 sort TUs by abbrev table
6196 for each TU with same abbrev table:
6197 read abbrev table if first user
6198 read TU top level DIE
6199 [IWBN if DWO skeletons had DW_AT_stmt_list]
6202 if (dwarf2_read_debug
)
6203 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6205 /* Sort in a separate table to maintain the order of all_type_units
6206 for .gdb_index: TU indices directly index all_type_units. */
6207 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6208 dwarf2_per_objfile
->n_type_units
);
6209 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6211 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6213 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6214 sorted_by_abbrev
[i
].abbrev_offset
=
6215 read_abbrev_offset (sig_type
->per_cu
.section
,
6216 sig_type
->per_cu
.offset
);
6218 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6219 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6220 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6222 abbrev_offset
.sect_off
= ~(unsigned) 0;
6223 abbrev_table
= NULL
;
6224 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6226 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6228 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6230 /* Switch to the next abbrev table if necessary. */
6231 if (abbrev_table
== NULL
6232 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6234 if (abbrev_table
!= NULL
)
6236 abbrev_table_free (abbrev_table
);
6237 /* Reset to NULL in case abbrev_table_read_table throws
6238 an error: abbrev_table_free_cleanup will get called. */
6239 abbrev_table
= NULL
;
6241 abbrev_offset
= tu
->abbrev_offset
;
6243 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6245 ++tu_stats
->nr_uniq_abbrev_tables
;
6248 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6249 build_type_psymtabs_reader
, NULL
);
6252 do_cleanups (cleanups
);
6255 /* Print collected type unit statistics. */
6258 print_tu_stats (void)
6260 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6262 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6263 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6264 dwarf2_per_objfile
->n_type_units
);
6265 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6266 tu_stats
->nr_uniq_abbrev_tables
);
6267 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6268 tu_stats
->nr_symtabs
);
6269 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6270 tu_stats
->nr_symtab_sharers
);
6271 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6272 tu_stats
->nr_stmt_less_type_units
);
6273 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6274 tu_stats
->nr_all_type_units_reallocs
);
6277 /* Traversal function for build_type_psymtabs. */
6280 build_type_psymtab_dependencies (void **slot
, void *info
)
6282 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6283 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6284 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6285 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6286 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6287 struct signatured_type
*iter
;
6290 gdb_assert (len
> 0);
6291 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6293 pst
->number_of_dependencies
= len
;
6294 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6295 len
* sizeof (struct psymtab
*));
6297 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6300 gdb_assert (iter
->per_cu
.is_debug_types
);
6301 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6302 iter
->type_unit_group
= tu_group
;
6305 VEC_free (sig_type_ptr
, tu_group
->tus
);
6310 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6311 Build partial symbol tables for the .debug_types comp-units. */
6314 build_type_psymtabs (struct objfile
*objfile
)
6316 if (! create_all_type_units (objfile
))
6319 build_type_psymtabs_1 ();
6322 /* Traversal function for process_skeletonless_type_unit.
6323 Read a TU in a DWO file and build partial symbols for it. */
6326 process_skeletonless_type_unit (void **slot
, void *info
)
6328 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6329 struct objfile
*objfile
= info
;
6330 struct signatured_type find_entry
, *entry
;
6332 /* If this TU doesn't exist in the global table, add it and read it in. */
6334 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6336 dwarf2_per_objfile
->signatured_types
6337 = allocate_signatured_type_table (objfile
);
6340 find_entry
.signature
= dwo_unit
->signature
;
6341 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6343 /* If we've already seen this type there's nothing to do. What's happening
6344 is we're doing our own version of comdat-folding here. */
6348 /* This does the job that create_all_type_units would have done for
6350 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6351 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6354 /* This does the job that build_type_psymtabs_1 would have done. */
6355 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6356 build_type_psymtabs_reader
, NULL
);
6361 /* Traversal function for process_skeletonless_type_units. */
6364 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6366 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6368 if (dwo_file
->tus
!= NULL
)
6370 htab_traverse_noresize (dwo_file
->tus
,
6371 process_skeletonless_type_unit
, info
);
6377 /* Scan all TUs of DWO files, verifying we've processed them.
6378 This is needed in case a TU was emitted without its skeleton.
6379 Note: This can't be done until we know what all the DWO files are. */
6382 process_skeletonless_type_units (struct objfile
*objfile
)
6384 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6385 if (get_dwp_file () == NULL
6386 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6388 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6389 process_dwo_file_for_skeletonless_type_units
,
6394 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6397 psymtabs_addrmap_cleanup (void *o
)
6399 struct objfile
*objfile
= o
;
6401 objfile
->psymtabs_addrmap
= NULL
;
6404 /* Compute the 'user' field for each psymtab in OBJFILE. */
6407 set_partial_user (struct objfile
*objfile
)
6411 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6413 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6414 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6420 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6422 /* Set the 'user' field only if it is not already set. */
6423 if (pst
->dependencies
[j
]->user
== NULL
)
6424 pst
->dependencies
[j
]->user
= pst
;
6429 /* Build the partial symbol table by doing a quick pass through the
6430 .debug_info and .debug_abbrev sections. */
6433 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6435 struct cleanup
*back_to
, *addrmap_cleanup
;
6436 struct obstack temp_obstack
;
6439 if (dwarf2_read_debug
)
6441 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6442 objfile_name (objfile
));
6445 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6447 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6449 /* Any cached compilation units will be linked by the per-objfile
6450 read_in_chain. Make sure to free them when we're done. */
6451 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6453 build_type_psymtabs (objfile
);
6455 create_all_comp_units (objfile
);
6457 /* Create a temporary address map on a temporary obstack. We later
6458 copy this to the final obstack. */
6459 obstack_init (&temp_obstack
);
6460 make_cleanup_obstack_free (&temp_obstack
);
6461 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6462 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6464 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6466 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6468 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6471 /* This has to wait until we read the CUs, we need the list of DWOs. */
6472 process_skeletonless_type_units (objfile
);
6474 /* Now that all TUs have been processed we can fill in the dependencies. */
6475 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6477 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6478 build_type_psymtab_dependencies
, NULL
);
6481 if (dwarf2_read_debug
)
6484 set_partial_user (objfile
);
6486 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6487 &objfile
->objfile_obstack
);
6488 discard_cleanups (addrmap_cleanup
);
6490 do_cleanups (back_to
);
6492 if (dwarf2_read_debug
)
6493 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6494 objfile_name (objfile
));
6497 /* die_reader_func for load_partial_comp_unit. */
6500 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6501 const gdb_byte
*info_ptr
,
6502 struct die_info
*comp_unit_die
,
6506 struct dwarf2_cu
*cu
= reader
->cu
;
6508 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6510 /* Check if comp unit has_children.
6511 If so, read the rest of the partial symbols from this comp unit.
6512 If not, there's no more debug_info for this comp unit. */
6514 load_partial_dies (reader
, info_ptr
, 0);
6517 /* Load the partial DIEs for a secondary CU into memory.
6518 This is also used when rereading a primary CU with load_all_dies. */
6521 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6523 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6524 load_partial_comp_unit_reader
, NULL
);
6528 read_comp_units_from_section (struct objfile
*objfile
,
6529 struct dwarf2_section_info
*section
,
6530 unsigned int is_dwz
,
6533 struct dwarf2_per_cu_data
***all_comp_units
)
6535 const gdb_byte
*info_ptr
;
6536 bfd
*abfd
= get_section_bfd_owner (section
);
6538 if (dwarf2_read_debug
)
6539 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6540 get_section_name (section
),
6541 get_section_file_name (section
));
6543 dwarf2_read_section (objfile
, section
);
6545 info_ptr
= section
->buffer
;
6547 while (info_ptr
< section
->buffer
+ section
->size
)
6549 unsigned int length
, initial_length_size
;
6550 struct dwarf2_per_cu_data
*this_cu
;
6553 offset
.sect_off
= info_ptr
- section
->buffer
;
6555 /* Read just enough information to find out where the next
6556 compilation unit is. */
6557 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6559 /* Save the compilation unit for later lookup. */
6560 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6561 sizeof (struct dwarf2_per_cu_data
));
6562 memset (this_cu
, 0, sizeof (*this_cu
));
6563 this_cu
->offset
= offset
;
6564 this_cu
->length
= length
+ initial_length_size
;
6565 this_cu
->is_dwz
= is_dwz
;
6566 this_cu
->objfile
= objfile
;
6567 this_cu
->section
= section
;
6569 if (*n_comp_units
== *n_allocated
)
6572 *all_comp_units
= xrealloc (*all_comp_units
,
6574 * sizeof (struct dwarf2_per_cu_data
*));
6576 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6579 info_ptr
= info_ptr
+ this_cu
->length
;
6583 /* Create a list of all compilation units in OBJFILE.
6584 This is only done for -readnow and building partial symtabs. */
6587 create_all_comp_units (struct objfile
*objfile
)
6591 struct dwarf2_per_cu_data
**all_comp_units
;
6592 struct dwz_file
*dwz
;
6596 all_comp_units
= xmalloc (n_allocated
6597 * sizeof (struct dwarf2_per_cu_data
*));
6599 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6600 &n_allocated
, &n_comp_units
, &all_comp_units
);
6602 dwz
= dwarf2_get_dwz_file ();
6604 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6605 &n_allocated
, &n_comp_units
,
6608 dwarf2_per_objfile
->all_comp_units
6609 = obstack_alloc (&objfile
->objfile_obstack
,
6610 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6611 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6612 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6613 xfree (all_comp_units
);
6614 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6617 /* Process all loaded DIEs for compilation unit CU, starting at
6618 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6619 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6620 DW_AT_ranges). See the comments of add_partial_subprogram on how
6621 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6624 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6625 CORE_ADDR
*highpc
, int set_addrmap
,
6626 struct dwarf2_cu
*cu
)
6628 struct partial_die_info
*pdi
;
6630 /* Now, march along the PDI's, descending into ones which have
6631 interesting children but skipping the children of the other ones,
6632 until we reach the end of the compilation unit. */
6638 fixup_partial_die (pdi
, cu
);
6640 /* Anonymous namespaces or modules have no name but have interesting
6641 children, so we need to look at them. Ditto for anonymous
6644 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6645 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6646 || pdi
->tag
== DW_TAG_imported_unit
)
6650 case DW_TAG_subprogram
:
6651 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6653 case DW_TAG_constant
:
6654 case DW_TAG_variable
:
6655 case DW_TAG_typedef
:
6656 case DW_TAG_union_type
:
6657 if (!pdi
->is_declaration
)
6659 add_partial_symbol (pdi
, cu
);
6662 case DW_TAG_class_type
:
6663 case DW_TAG_interface_type
:
6664 case DW_TAG_structure_type
:
6665 if (!pdi
->is_declaration
)
6667 add_partial_symbol (pdi
, cu
);
6670 case DW_TAG_enumeration_type
:
6671 if (!pdi
->is_declaration
)
6672 add_partial_enumeration (pdi
, cu
);
6674 case DW_TAG_base_type
:
6675 case DW_TAG_subrange_type
:
6676 /* File scope base type definitions are added to the partial
6678 add_partial_symbol (pdi
, cu
);
6680 case DW_TAG_namespace
:
6681 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6684 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6686 case DW_TAG_imported_unit
:
6688 struct dwarf2_per_cu_data
*per_cu
;
6690 /* For now we don't handle imported units in type units. */
6691 if (cu
->per_cu
->is_debug_types
)
6693 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6694 " supported in type units [in module %s]"),
6695 objfile_name (cu
->objfile
));
6698 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6702 /* Go read the partial unit, if needed. */
6703 if (per_cu
->v
.psymtab
== NULL
)
6704 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6706 VEC_safe_push (dwarf2_per_cu_ptr
,
6707 cu
->per_cu
->imported_symtabs
, per_cu
);
6710 case DW_TAG_imported_declaration
:
6711 add_partial_symbol (pdi
, cu
);
6718 /* If the die has a sibling, skip to the sibling. */
6720 pdi
= pdi
->die_sibling
;
6724 /* Functions used to compute the fully scoped name of a partial DIE.
6726 Normally, this is simple. For C++, the parent DIE's fully scoped
6727 name is concatenated with "::" and the partial DIE's name. For
6728 Java, the same thing occurs except that "." is used instead of "::".
6729 Enumerators are an exception; they use the scope of their parent
6730 enumeration type, i.e. the name of the enumeration type is not
6731 prepended to the enumerator.
6733 There are two complexities. One is DW_AT_specification; in this
6734 case "parent" means the parent of the target of the specification,
6735 instead of the direct parent of the DIE. The other is compilers
6736 which do not emit DW_TAG_namespace; in this case we try to guess
6737 the fully qualified name of structure types from their members'
6738 linkage names. This must be done using the DIE's children rather
6739 than the children of any DW_AT_specification target. We only need
6740 to do this for structures at the top level, i.e. if the target of
6741 any DW_AT_specification (if any; otherwise the DIE itself) does not
6744 /* Compute the scope prefix associated with PDI's parent, in
6745 compilation unit CU. The result will be allocated on CU's
6746 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6747 field. NULL is returned if no prefix is necessary. */
6749 partial_die_parent_scope (struct partial_die_info
*pdi
,
6750 struct dwarf2_cu
*cu
)
6752 const char *grandparent_scope
;
6753 struct partial_die_info
*parent
, *real_pdi
;
6755 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6756 then this means the parent of the specification DIE. */
6759 while (real_pdi
->has_specification
)
6760 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6761 real_pdi
->spec_is_dwz
, cu
);
6763 parent
= real_pdi
->die_parent
;
6767 if (parent
->scope_set
)
6768 return parent
->scope
;
6770 fixup_partial_die (parent
, cu
);
6772 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6774 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6775 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6776 Work around this problem here. */
6777 if (cu
->language
== language_cplus
6778 && parent
->tag
== DW_TAG_namespace
6779 && strcmp (parent
->name
, "::") == 0
6780 && grandparent_scope
== NULL
)
6782 parent
->scope
= NULL
;
6783 parent
->scope_set
= 1;
6787 if (pdi
->tag
== DW_TAG_enumerator
)
6788 /* Enumerators should not get the name of the enumeration as a prefix. */
6789 parent
->scope
= grandparent_scope
;
6790 else if (parent
->tag
== DW_TAG_namespace
6791 || parent
->tag
== DW_TAG_module
6792 || parent
->tag
== DW_TAG_structure_type
6793 || parent
->tag
== DW_TAG_class_type
6794 || parent
->tag
== DW_TAG_interface_type
6795 || parent
->tag
== DW_TAG_union_type
6796 || parent
->tag
== DW_TAG_enumeration_type
)
6798 if (grandparent_scope
== NULL
)
6799 parent
->scope
= parent
->name
;
6801 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6803 parent
->name
, 0, cu
);
6807 /* FIXME drow/2004-04-01: What should we be doing with
6808 function-local names? For partial symbols, we should probably be
6810 complaint (&symfile_complaints
,
6811 _("unhandled containing DIE tag %d for DIE at %d"),
6812 parent
->tag
, pdi
->offset
.sect_off
);
6813 parent
->scope
= grandparent_scope
;
6816 parent
->scope_set
= 1;
6817 return parent
->scope
;
6820 /* Return the fully scoped name associated with PDI, from compilation unit
6821 CU. The result will be allocated with malloc. */
6824 partial_die_full_name (struct partial_die_info
*pdi
,
6825 struct dwarf2_cu
*cu
)
6827 const char *parent_scope
;
6829 /* If this is a template instantiation, we can not work out the
6830 template arguments from partial DIEs. So, unfortunately, we have
6831 to go through the full DIEs. At least any work we do building
6832 types here will be reused if full symbols are loaded later. */
6833 if (pdi
->has_template_arguments
)
6835 fixup_partial_die (pdi
, cu
);
6837 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6839 struct die_info
*die
;
6840 struct attribute attr
;
6841 struct dwarf2_cu
*ref_cu
= cu
;
6843 /* DW_FORM_ref_addr is using section offset. */
6845 attr
.form
= DW_FORM_ref_addr
;
6846 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6847 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6849 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6853 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6854 if (parent_scope
== NULL
)
6857 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6861 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6863 struct objfile
*objfile
= cu
->objfile
;
6864 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6866 const char *actual_name
= NULL
;
6868 char *built_actual_name
;
6870 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6872 built_actual_name
= partial_die_full_name (pdi
, cu
);
6873 if (built_actual_name
!= NULL
)
6874 actual_name
= built_actual_name
;
6876 if (actual_name
== NULL
)
6877 actual_name
= pdi
->name
;
6881 case DW_TAG_subprogram
:
6882 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6883 if (pdi
->is_external
|| cu
->language
== language_ada
)
6885 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6886 of the global scope. But in Ada, we want to be able to access
6887 nested procedures globally. So all Ada subprograms are stored
6888 in the global scope. */
6889 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6891 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6892 built_actual_name
!= NULL
,
6893 VAR_DOMAIN
, LOC_BLOCK
,
6894 &objfile
->global_psymbols
,
6895 0, addr
, cu
->language
, objfile
);
6899 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6901 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6902 built_actual_name
!= NULL
,
6903 VAR_DOMAIN
, LOC_BLOCK
,
6904 &objfile
->static_psymbols
,
6905 0, addr
, cu
->language
, objfile
);
6908 case DW_TAG_constant
:
6910 struct psymbol_allocation_list
*list
;
6912 if (pdi
->is_external
)
6913 list
= &objfile
->global_psymbols
;
6915 list
= &objfile
->static_psymbols
;
6916 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6917 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6918 list
, 0, 0, cu
->language
, objfile
);
6921 case DW_TAG_variable
:
6923 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6927 && !dwarf2_per_objfile
->has_section_at_zero
)
6929 /* A global or static variable may also have been stripped
6930 out by the linker if unused, in which case its address
6931 will be nullified; do not add such variables into partial
6932 symbol table then. */
6934 else if (pdi
->is_external
)
6937 Don't enter into the minimal symbol tables as there is
6938 a minimal symbol table entry from the ELF symbols already.
6939 Enter into partial symbol table if it has a location
6940 descriptor or a type.
6941 If the location descriptor is missing, new_symbol will create
6942 a LOC_UNRESOLVED symbol, the address of the variable will then
6943 be determined from the minimal symbol table whenever the variable
6945 The address for the partial symbol table entry is not
6946 used by GDB, but it comes in handy for debugging partial symbol
6949 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6950 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6951 built_actual_name
!= NULL
,
6952 VAR_DOMAIN
, LOC_STATIC
,
6953 &objfile
->global_psymbols
,
6955 cu
->language
, objfile
);
6959 /* Static Variable. Skip symbols without location descriptors. */
6960 if (pdi
->d
.locdesc
== NULL
)
6962 xfree (built_actual_name
);
6965 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6966 mst_file_data, objfile); */
6967 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6968 built_actual_name
!= NULL
,
6969 VAR_DOMAIN
, LOC_STATIC
,
6970 &objfile
->static_psymbols
,
6972 cu
->language
, objfile
);
6975 case DW_TAG_typedef
:
6976 case DW_TAG_base_type
:
6977 case DW_TAG_subrange_type
:
6978 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6979 built_actual_name
!= NULL
,
6980 VAR_DOMAIN
, LOC_TYPEDEF
,
6981 &objfile
->static_psymbols
,
6982 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6984 case DW_TAG_imported_declaration
:
6985 case DW_TAG_namespace
:
6986 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6987 built_actual_name
!= NULL
,
6988 VAR_DOMAIN
, LOC_TYPEDEF
,
6989 &objfile
->global_psymbols
,
6990 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6993 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6994 built_actual_name
!= NULL
,
6995 MODULE_DOMAIN
, LOC_TYPEDEF
,
6996 &objfile
->global_psymbols
,
6997 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6999 case DW_TAG_class_type
:
7000 case DW_TAG_interface_type
:
7001 case DW_TAG_structure_type
:
7002 case DW_TAG_union_type
:
7003 case DW_TAG_enumeration_type
:
7004 /* Skip external references. The DWARF standard says in the section
7005 about "Structure, Union, and Class Type Entries": "An incomplete
7006 structure, union or class type is represented by a structure,
7007 union or class entry that does not have a byte size attribute
7008 and that has a DW_AT_declaration attribute." */
7009 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7011 xfree (built_actual_name
);
7015 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7016 static vs. global. */
7017 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7018 built_actual_name
!= NULL
,
7019 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7020 (cu
->language
== language_cplus
7021 || cu
->language
== language_java
)
7022 ? &objfile
->global_psymbols
7023 : &objfile
->static_psymbols
,
7024 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7027 case DW_TAG_enumerator
:
7028 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7029 built_actual_name
!= NULL
,
7030 VAR_DOMAIN
, LOC_CONST
,
7031 (cu
->language
== language_cplus
7032 || cu
->language
== language_java
)
7033 ? &objfile
->global_psymbols
7034 : &objfile
->static_psymbols
,
7035 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7041 xfree (built_actual_name
);
7044 /* Read a partial die corresponding to a namespace; also, add a symbol
7045 corresponding to that namespace to the symbol table. NAMESPACE is
7046 the name of the enclosing namespace. */
7049 add_partial_namespace (struct partial_die_info
*pdi
,
7050 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7051 int set_addrmap
, struct dwarf2_cu
*cu
)
7053 /* Add a symbol for the namespace. */
7055 add_partial_symbol (pdi
, cu
);
7057 /* Now scan partial symbols in that namespace. */
7059 if (pdi
->has_children
)
7060 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7063 /* Read a partial die corresponding to a Fortran module. */
7066 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7067 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7069 /* Add a symbol for the namespace. */
7071 add_partial_symbol (pdi
, cu
);
7073 /* Now scan partial symbols in that module. */
7075 if (pdi
->has_children
)
7076 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7079 /* Read a partial die corresponding to a subprogram and create a partial
7080 symbol for that subprogram. When the CU language allows it, this
7081 routine also defines a partial symbol for each nested subprogram
7082 that this subprogram contains. If SET_ADDRMAP is true, record the
7083 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7084 and highest PC values found in PDI.
7086 PDI may also be a lexical block, in which case we simply search
7087 recursively for subprograms defined inside that lexical block.
7088 Again, this is only performed when the CU language allows this
7089 type of definitions. */
7092 add_partial_subprogram (struct partial_die_info
*pdi
,
7093 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7094 int set_addrmap
, struct dwarf2_cu
*cu
)
7096 if (pdi
->tag
== DW_TAG_subprogram
)
7098 if (pdi
->has_pc_info
)
7100 if (pdi
->lowpc
< *lowpc
)
7101 *lowpc
= pdi
->lowpc
;
7102 if (pdi
->highpc
> *highpc
)
7103 *highpc
= pdi
->highpc
;
7106 struct objfile
*objfile
= cu
->objfile
;
7107 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7112 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7113 SECT_OFF_TEXT (objfile
));
7114 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7115 pdi
->lowpc
+ baseaddr
);
7116 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7117 pdi
->highpc
+ baseaddr
);
7118 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7119 cu
->per_cu
->v
.psymtab
);
7123 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7125 if (!pdi
->is_declaration
)
7126 /* Ignore subprogram DIEs that do not have a name, they are
7127 illegal. Do not emit a complaint at this point, we will
7128 do so when we convert this psymtab into a symtab. */
7130 add_partial_symbol (pdi
, cu
);
7134 if (! pdi
->has_children
)
7137 if (cu
->language
== language_ada
)
7139 pdi
= pdi
->die_child
;
7142 fixup_partial_die (pdi
, cu
);
7143 if (pdi
->tag
== DW_TAG_subprogram
7144 || pdi
->tag
== DW_TAG_lexical_block
)
7145 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7146 pdi
= pdi
->die_sibling
;
7151 /* Read a partial die corresponding to an enumeration type. */
7154 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7155 struct dwarf2_cu
*cu
)
7157 struct partial_die_info
*pdi
;
7159 if (enum_pdi
->name
!= NULL
)
7160 add_partial_symbol (enum_pdi
, cu
);
7162 pdi
= enum_pdi
->die_child
;
7165 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7166 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7168 add_partial_symbol (pdi
, cu
);
7169 pdi
= pdi
->die_sibling
;
7173 /* Return the initial uleb128 in the die at INFO_PTR. */
7176 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7178 unsigned int bytes_read
;
7180 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7183 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7184 Return the corresponding abbrev, or NULL if the number is zero (indicating
7185 an empty DIE). In either case *BYTES_READ will be set to the length of
7186 the initial number. */
7188 static struct abbrev_info
*
7189 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7190 struct dwarf2_cu
*cu
)
7192 bfd
*abfd
= cu
->objfile
->obfd
;
7193 unsigned int abbrev_number
;
7194 struct abbrev_info
*abbrev
;
7196 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7198 if (abbrev_number
== 0)
7201 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7204 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7205 " at offset 0x%x [in module %s]"),
7206 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7207 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7213 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7214 Returns a pointer to the end of a series of DIEs, terminated by an empty
7215 DIE. Any children of the skipped DIEs will also be skipped. */
7217 static const gdb_byte
*
7218 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7220 struct dwarf2_cu
*cu
= reader
->cu
;
7221 struct abbrev_info
*abbrev
;
7222 unsigned int bytes_read
;
7226 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7228 return info_ptr
+ bytes_read
;
7230 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7234 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7235 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7236 abbrev corresponding to that skipped uleb128 should be passed in
7237 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7240 static const gdb_byte
*
7241 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7242 struct abbrev_info
*abbrev
)
7244 unsigned int bytes_read
;
7245 struct attribute attr
;
7246 bfd
*abfd
= reader
->abfd
;
7247 struct dwarf2_cu
*cu
= reader
->cu
;
7248 const gdb_byte
*buffer
= reader
->buffer
;
7249 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7250 const gdb_byte
*start_info_ptr
= info_ptr
;
7251 unsigned int form
, i
;
7253 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7255 /* The only abbrev we care about is DW_AT_sibling. */
7256 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7258 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7259 if (attr
.form
== DW_FORM_ref_addr
)
7260 complaint (&symfile_complaints
,
7261 _("ignoring absolute DW_AT_sibling"));
7264 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7265 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7267 if (sibling_ptr
< info_ptr
)
7268 complaint (&symfile_complaints
,
7269 _("DW_AT_sibling points backwards"));
7270 else if (sibling_ptr
> reader
->buffer_end
)
7271 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7277 /* If it isn't DW_AT_sibling, skip this attribute. */
7278 form
= abbrev
->attrs
[i
].form
;
7282 case DW_FORM_ref_addr
:
7283 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7284 and later it is offset sized. */
7285 if (cu
->header
.version
== 2)
7286 info_ptr
+= cu
->header
.addr_size
;
7288 info_ptr
+= cu
->header
.offset_size
;
7290 case DW_FORM_GNU_ref_alt
:
7291 info_ptr
+= cu
->header
.offset_size
;
7294 info_ptr
+= cu
->header
.addr_size
;
7301 case DW_FORM_flag_present
:
7313 case DW_FORM_ref_sig8
:
7316 case DW_FORM_string
:
7317 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7318 info_ptr
+= bytes_read
;
7320 case DW_FORM_sec_offset
:
7322 case DW_FORM_GNU_strp_alt
:
7323 info_ptr
+= cu
->header
.offset_size
;
7325 case DW_FORM_exprloc
:
7327 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7328 info_ptr
+= bytes_read
;
7330 case DW_FORM_block1
:
7331 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7333 case DW_FORM_block2
:
7334 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7336 case DW_FORM_block4
:
7337 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7341 case DW_FORM_ref_udata
:
7342 case DW_FORM_GNU_addr_index
:
7343 case DW_FORM_GNU_str_index
:
7344 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7346 case DW_FORM_indirect
:
7347 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7348 info_ptr
+= bytes_read
;
7349 /* We need to continue parsing from here, so just go back to
7351 goto skip_attribute
;
7354 error (_("Dwarf Error: Cannot handle %s "
7355 "in DWARF reader [in module %s]"),
7356 dwarf_form_name (form
),
7357 bfd_get_filename (abfd
));
7361 if (abbrev
->has_children
)
7362 return skip_children (reader
, info_ptr
);
7367 /* Locate ORIG_PDI's sibling.
7368 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7370 static const gdb_byte
*
7371 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7372 struct partial_die_info
*orig_pdi
,
7373 const gdb_byte
*info_ptr
)
7375 /* Do we know the sibling already? */
7377 if (orig_pdi
->sibling
)
7378 return orig_pdi
->sibling
;
7380 /* Are there any children to deal with? */
7382 if (!orig_pdi
->has_children
)
7385 /* Skip the children the long way. */
7387 return skip_children (reader
, info_ptr
);
7390 /* Expand this partial symbol table into a full symbol table. SELF is
7394 dwarf2_read_symtab (struct partial_symtab
*self
,
7395 struct objfile
*objfile
)
7399 warning (_("bug: psymtab for %s is already read in."),
7406 printf_filtered (_("Reading in symbols for %s..."),
7408 gdb_flush (gdb_stdout
);
7411 /* Restore our global data. */
7412 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7414 /* If this psymtab is constructed from a debug-only objfile, the
7415 has_section_at_zero flag will not necessarily be correct. We
7416 can get the correct value for this flag by looking at the data
7417 associated with the (presumably stripped) associated objfile. */
7418 if (objfile
->separate_debug_objfile_backlink
)
7420 struct dwarf2_per_objfile
*dpo_backlink
7421 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7422 dwarf2_objfile_data_key
);
7424 dwarf2_per_objfile
->has_section_at_zero
7425 = dpo_backlink
->has_section_at_zero
;
7428 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7430 psymtab_to_symtab_1 (self
);
7432 /* Finish up the debug error message. */
7434 printf_filtered (_("done.\n"));
7437 process_cu_includes ();
7440 /* Reading in full CUs. */
7442 /* Add PER_CU to the queue. */
7445 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7446 enum language pretend_language
)
7448 struct dwarf2_queue_item
*item
;
7451 item
= xmalloc (sizeof (*item
));
7452 item
->per_cu
= per_cu
;
7453 item
->pretend_language
= pretend_language
;
7456 if (dwarf2_queue
== NULL
)
7457 dwarf2_queue
= item
;
7459 dwarf2_queue_tail
->next
= item
;
7461 dwarf2_queue_tail
= item
;
7464 /* If PER_CU is not yet queued, add it to the queue.
7465 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7467 The result is non-zero if PER_CU was queued, otherwise the result is zero
7468 meaning either PER_CU is already queued or it is already loaded.
7470 N.B. There is an invariant here that if a CU is queued then it is loaded.
7471 The caller is required to load PER_CU if we return non-zero. */
7474 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7475 struct dwarf2_per_cu_data
*per_cu
,
7476 enum language pretend_language
)
7478 /* We may arrive here during partial symbol reading, if we need full
7479 DIEs to process an unusual case (e.g. template arguments). Do
7480 not queue PER_CU, just tell our caller to load its DIEs. */
7481 if (dwarf2_per_objfile
->reading_partial_symbols
)
7483 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7488 /* Mark the dependence relation so that we don't flush PER_CU
7490 if (dependent_cu
!= NULL
)
7491 dwarf2_add_dependence (dependent_cu
, per_cu
);
7493 /* If it's already on the queue, we have nothing to do. */
7497 /* If the compilation unit is already loaded, just mark it as
7499 if (per_cu
->cu
!= NULL
)
7501 per_cu
->cu
->last_used
= 0;
7505 /* Add it to the queue. */
7506 queue_comp_unit (per_cu
, pretend_language
);
7511 /* Process the queue. */
7514 process_queue (void)
7516 struct dwarf2_queue_item
*item
, *next_item
;
7518 if (dwarf2_read_debug
)
7520 fprintf_unfiltered (gdb_stdlog
,
7521 "Expanding one or more symtabs of objfile %s ...\n",
7522 objfile_name (dwarf2_per_objfile
->objfile
));
7525 /* The queue starts out with one item, but following a DIE reference
7526 may load a new CU, adding it to the end of the queue. */
7527 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7529 if (dwarf2_per_objfile
->using_index
7530 ? !item
->per_cu
->v
.quick
->compunit_symtab
7531 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7533 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7534 unsigned int debug_print_threshold
;
7537 if (per_cu
->is_debug_types
)
7539 struct signatured_type
*sig_type
=
7540 (struct signatured_type
*) per_cu
;
7542 sprintf (buf
, "TU %s at offset 0x%x",
7543 hex_string (sig_type
->signature
),
7544 per_cu
->offset
.sect_off
);
7545 /* There can be 100s of TUs.
7546 Only print them in verbose mode. */
7547 debug_print_threshold
= 2;
7551 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7552 debug_print_threshold
= 1;
7555 if (dwarf2_read_debug
>= debug_print_threshold
)
7556 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7558 if (per_cu
->is_debug_types
)
7559 process_full_type_unit (per_cu
, item
->pretend_language
);
7561 process_full_comp_unit (per_cu
, item
->pretend_language
);
7563 if (dwarf2_read_debug
>= debug_print_threshold
)
7564 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7567 item
->per_cu
->queued
= 0;
7568 next_item
= item
->next
;
7572 dwarf2_queue_tail
= NULL
;
7574 if (dwarf2_read_debug
)
7576 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7577 objfile_name (dwarf2_per_objfile
->objfile
));
7581 /* Free all allocated queue entries. This function only releases anything if
7582 an error was thrown; if the queue was processed then it would have been
7583 freed as we went along. */
7586 dwarf2_release_queue (void *dummy
)
7588 struct dwarf2_queue_item
*item
, *last
;
7590 item
= dwarf2_queue
;
7593 /* Anything still marked queued is likely to be in an
7594 inconsistent state, so discard it. */
7595 if (item
->per_cu
->queued
)
7597 if (item
->per_cu
->cu
!= NULL
)
7598 free_one_cached_comp_unit (item
->per_cu
);
7599 item
->per_cu
->queued
= 0;
7607 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7610 /* Read in full symbols for PST, and anything it depends on. */
7613 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7615 struct dwarf2_per_cu_data
*per_cu
;
7621 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7622 if (!pst
->dependencies
[i
]->readin
7623 && pst
->dependencies
[i
]->user
== NULL
)
7625 /* Inform about additional files that need to be read in. */
7628 /* FIXME: i18n: Need to make this a single string. */
7629 fputs_filtered (" ", gdb_stdout
);
7631 fputs_filtered ("and ", gdb_stdout
);
7633 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7634 wrap_here (""); /* Flush output. */
7635 gdb_flush (gdb_stdout
);
7637 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7640 per_cu
= pst
->read_symtab_private
;
7644 /* It's an include file, no symbols to read for it.
7645 Everything is in the parent symtab. */
7650 dw2_do_instantiate_symtab (per_cu
);
7653 /* Trivial hash function for die_info: the hash value of a DIE
7654 is its offset in .debug_info for this objfile. */
7657 die_hash (const void *item
)
7659 const struct die_info
*die
= item
;
7661 return die
->offset
.sect_off
;
7664 /* Trivial comparison function for die_info structures: two DIEs
7665 are equal if they have the same offset. */
7668 die_eq (const void *item_lhs
, const void *item_rhs
)
7670 const struct die_info
*die_lhs
= item_lhs
;
7671 const struct die_info
*die_rhs
= item_rhs
;
7673 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7676 /* die_reader_func for load_full_comp_unit.
7677 This is identical to read_signatured_type_reader,
7678 but is kept separate for now. */
7681 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7682 const gdb_byte
*info_ptr
,
7683 struct die_info
*comp_unit_die
,
7687 struct dwarf2_cu
*cu
= reader
->cu
;
7688 enum language
*language_ptr
= data
;
7690 gdb_assert (cu
->die_hash
== NULL
);
7692 htab_create_alloc_ex (cu
->header
.length
/ 12,
7696 &cu
->comp_unit_obstack
,
7697 hashtab_obstack_allocate
,
7698 dummy_obstack_deallocate
);
7701 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7702 &info_ptr
, comp_unit_die
);
7703 cu
->dies
= comp_unit_die
;
7704 /* comp_unit_die is not stored in die_hash, no need. */
7706 /* We try not to read any attributes in this function, because not
7707 all CUs needed for references have been loaded yet, and symbol
7708 table processing isn't initialized. But we have to set the CU language,
7709 or we won't be able to build types correctly.
7710 Similarly, if we do not read the producer, we can not apply
7711 producer-specific interpretation. */
7712 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7715 /* Load the DIEs associated with PER_CU into memory. */
7718 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7719 enum language pretend_language
)
7721 gdb_assert (! this_cu
->is_debug_types
);
7723 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7724 load_full_comp_unit_reader
, &pretend_language
);
7727 /* Add a DIE to the delayed physname list. */
7730 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7731 const char *name
, struct die_info
*die
,
7732 struct dwarf2_cu
*cu
)
7734 struct delayed_method_info mi
;
7736 mi
.fnfield_index
= fnfield_index
;
7740 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7743 /* A cleanup for freeing the delayed method list. */
7746 free_delayed_list (void *ptr
)
7748 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7749 if (cu
->method_list
!= NULL
)
7751 VEC_free (delayed_method_info
, cu
->method_list
);
7752 cu
->method_list
= NULL
;
7756 /* Compute the physnames of any methods on the CU's method list.
7758 The computation of method physnames is delayed in order to avoid the
7759 (bad) condition that one of the method's formal parameters is of an as yet
7763 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7766 struct delayed_method_info
*mi
;
7767 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7769 const char *physname
;
7770 struct fn_fieldlist
*fn_flp
7771 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7772 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7773 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7774 = physname
? physname
: "";
7778 /* Go objects should be embedded in a DW_TAG_module DIE,
7779 and it's not clear if/how imported objects will appear.
7780 To keep Go support simple until that's worked out,
7781 go back through what we've read and create something usable.
7782 We could do this while processing each DIE, and feels kinda cleaner,
7783 but that way is more invasive.
7784 This is to, for example, allow the user to type "p var" or "b main"
7785 without having to specify the package name, and allow lookups
7786 of module.object to work in contexts that use the expression
7790 fixup_go_packaging (struct dwarf2_cu
*cu
)
7792 char *package_name
= NULL
;
7793 struct pending
*list
;
7796 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7798 for (i
= 0; i
< list
->nsyms
; ++i
)
7800 struct symbol
*sym
= list
->symbol
[i
];
7802 if (SYMBOL_LANGUAGE (sym
) == language_go
7803 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7805 char *this_package_name
= go_symbol_package_name (sym
);
7807 if (this_package_name
== NULL
)
7809 if (package_name
== NULL
)
7810 package_name
= this_package_name
;
7813 if (strcmp (package_name
, this_package_name
) != 0)
7814 complaint (&symfile_complaints
,
7815 _("Symtab %s has objects from two different Go packages: %s and %s"),
7816 (symbol_symtab (sym
) != NULL
7817 ? symtab_to_filename_for_display
7818 (symbol_symtab (sym
))
7819 : objfile_name (cu
->objfile
)),
7820 this_package_name
, package_name
);
7821 xfree (this_package_name
);
7827 if (package_name
!= NULL
)
7829 struct objfile
*objfile
= cu
->objfile
;
7830 const char *saved_package_name
7831 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7833 strlen (package_name
));
7834 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7835 saved_package_name
, objfile
);
7838 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7840 sym
= allocate_symbol (objfile
);
7841 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7842 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7843 strlen (saved_package_name
), 0, objfile
);
7844 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7845 e.g., "main" finds the "main" module and not C's main(). */
7846 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7847 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7848 SYMBOL_TYPE (sym
) = type
;
7850 add_symbol_to_list (sym
, &global_symbols
);
7852 xfree (package_name
);
7856 /* Return the symtab for PER_CU. This works properly regardless of
7857 whether we're using the index or psymtabs. */
7859 static struct compunit_symtab
*
7860 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7862 return (dwarf2_per_objfile
->using_index
7863 ? per_cu
->v
.quick
->compunit_symtab
7864 : per_cu
->v
.psymtab
->compunit_symtab
);
7867 /* A helper function for computing the list of all symbol tables
7868 included by PER_CU. */
7871 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7872 htab_t all_children
, htab_t all_type_symtabs
,
7873 struct dwarf2_per_cu_data
*per_cu
,
7874 struct compunit_symtab
*immediate_parent
)
7878 struct compunit_symtab
*cust
;
7879 struct dwarf2_per_cu_data
*iter
;
7881 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7884 /* This inclusion and its children have been processed. */
7889 /* Only add a CU if it has a symbol table. */
7890 cust
= get_compunit_symtab (per_cu
);
7893 /* If this is a type unit only add its symbol table if we haven't
7894 seen it yet (type unit per_cu's can share symtabs). */
7895 if (per_cu
->is_debug_types
)
7897 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7901 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7902 if (cust
->user
== NULL
)
7903 cust
->user
= immediate_parent
;
7908 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7909 if (cust
->user
== NULL
)
7910 cust
->user
= immediate_parent
;
7915 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7918 recursively_compute_inclusions (result
, all_children
,
7919 all_type_symtabs
, iter
, cust
);
7923 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7927 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7929 gdb_assert (! per_cu
->is_debug_types
);
7931 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7934 struct dwarf2_per_cu_data
*per_cu_iter
;
7935 struct compunit_symtab
*compunit_symtab_iter
;
7936 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7937 htab_t all_children
, all_type_symtabs
;
7938 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7940 /* If we don't have a symtab, we can just skip this case. */
7944 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7945 NULL
, xcalloc
, xfree
);
7946 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7947 NULL
, xcalloc
, xfree
);
7950 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7954 recursively_compute_inclusions (&result_symtabs
, all_children
,
7955 all_type_symtabs
, per_cu_iter
,
7959 /* Now we have a transitive closure of all the included symtabs. */
7960 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7962 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7963 (len
+ 1) * sizeof (struct symtab
*));
7965 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7966 compunit_symtab_iter
);
7968 cust
->includes
[ix
] = compunit_symtab_iter
;
7969 cust
->includes
[len
] = NULL
;
7971 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7972 htab_delete (all_children
);
7973 htab_delete (all_type_symtabs
);
7977 /* Compute the 'includes' field for the symtabs of all the CUs we just
7981 process_cu_includes (void)
7984 struct dwarf2_per_cu_data
*iter
;
7987 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7991 if (! iter
->is_debug_types
)
7992 compute_compunit_symtab_includes (iter
);
7995 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7998 /* Generate full symbol information for PER_CU, whose DIEs have
7999 already been loaded into memory. */
8002 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8003 enum language pretend_language
)
8005 struct dwarf2_cu
*cu
= per_cu
->cu
;
8006 struct objfile
*objfile
= per_cu
->objfile
;
8007 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8008 CORE_ADDR lowpc
, highpc
;
8009 struct compunit_symtab
*cust
;
8010 struct cleanup
*back_to
, *delayed_list_cleanup
;
8012 struct block
*static_block
;
8015 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8018 back_to
= make_cleanup (really_free_pendings
, NULL
);
8019 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8021 cu
->list_in_scope
= &file_symbols
;
8023 cu
->language
= pretend_language
;
8024 cu
->language_defn
= language_def (cu
->language
);
8026 /* Do line number decoding in read_file_scope () */
8027 process_die (cu
->dies
, cu
);
8029 /* For now fudge the Go package. */
8030 if (cu
->language
== language_go
)
8031 fixup_go_packaging (cu
);
8033 /* Now that we have processed all the DIEs in the CU, all the types
8034 should be complete, and it should now be safe to compute all of the
8036 compute_delayed_physnames (cu
);
8037 do_cleanups (delayed_list_cleanup
);
8039 /* Some compilers don't define a DW_AT_high_pc attribute for the
8040 compilation unit. If the DW_AT_high_pc is missing, synthesize
8041 it, by scanning the DIE's below the compilation unit. */
8042 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8044 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8045 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8047 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8048 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8049 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8050 addrmap to help ensure it has an accurate map of pc values belonging to
8052 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8054 cust
= end_symtab_from_static_block (static_block
,
8055 SECT_OFF_TEXT (objfile
), 0);
8059 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8061 /* Set symtab language to language from DW_AT_language. If the
8062 compilation is from a C file generated by language preprocessors, do
8063 not set the language if it was already deduced by start_subfile. */
8064 if (!(cu
->language
== language_c
8065 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8066 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8068 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8069 produce DW_AT_location with location lists but it can be possibly
8070 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8071 there were bugs in prologue debug info, fixed later in GCC-4.5
8072 by "unwind info for epilogues" patch (which is not directly related).
8074 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8075 needed, it would be wrong due to missing DW_AT_producer there.
8077 Still one can confuse GDB by using non-standard GCC compilation
8078 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8080 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8081 cust
->locations_valid
= 1;
8083 if (gcc_4_minor
>= 5)
8084 cust
->epilogue_unwind_valid
= 1;
8086 cust
->call_site_htab
= cu
->call_site_htab
;
8089 if (dwarf2_per_objfile
->using_index
)
8090 per_cu
->v
.quick
->compunit_symtab
= cust
;
8093 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8094 pst
->compunit_symtab
= cust
;
8098 /* Push it for inclusion processing later. */
8099 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8101 do_cleanups (back_to
);
8104 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8105 already been loaded into memory. */
8108 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8109 enum language pretend_language
)
8111 struct dwarf2_cu
*cu
= per_cu
->cu
;
8112 struct objfile
*objfile
= per_cu
->objfile
;
8113 struct compunit_symtab
*cust
;
8114 struct cleanup
*back_to
, *delayed_list_cleanup
;
8115 struct signatured_type
*sig_type
;
8117 gdb_assert (per_cu
->is_debug_types
);
8118 sig_type
= (struct signatured_type
*) per_cu
;
8121 back_to
= make_cleanup (really_free_pendings
, NULL
);
8122 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8124 cu
->list_in_scope
= &file_symbols
;
8126 cu
->language
= pretend_language
;
8127 cu
->language_defn
= language_def (cu
->language
);
8129 /* The symbol tables are set up in read_type_unit_scope. */
8130 process_die (cu
->dies
, cu
);
8132 /* For now fudge the Go package. */
8133 if (cu
->language
== language_go
)
8134 fixup_go_packaging (cu
);
8136 /* Now that we have processed all the DIEs in the CU, all the types
8137 should be complete, and it should now be safe to compute all of the
8139 compute_delayed_physnames (cu
);
8140 do_cleanups (delayed_list_cleanup
);
8142 /* TUs share symbol tables.
8143 If this is the first TU to use this symtab, complete the construction
8144 of it with end_expandable_symtab. Otherwise, complete the addition of
8145 this TU's symbols to the existing symtab. */
8146 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8148 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8149 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8153 /* Set symtab language to language from DW_AT_language. If the
8154 compilation is from a C file generated by language preprocessors,
8155 do not set the language if it was already deduced by
8157 if (!(cu
->language
== language_c
8158 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8159 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8164 augment_type_symtab ();
8165 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8168 if (dwarf2_per_objfile
->using_index
)
8169 per_cu
->v
.quick
->compunit_symtab
= cust
;
8172 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8173 pst
->compunit_symtab
= cust
;
8177 do_cleanups (back_to
);
8180 /* Process an imported unit DIE. */
8183 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8185 struct attribute
*attr
;
8187 /* For now we don't handle imported units in type units. */
8188 if (cu
->per_cu
->is_debug_types
)
8190 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8191 " supported in type units [in module %s]"),
8192 objfile_name (cu
->objfile
));
8195 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8198 struct dwarf2_per_cu_data
*per_cu
;
8199 struct symtab
*imported_symtab
;
8203 offset
= dwarf2_get_ref_die_offset (attr
);
8204 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8205 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8207 /* If necessary, add it to the queue and load its DIEs. */
8208 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8209 load_full_comp_unit (per_cu
, cu
->language
);
8211 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8216 /* Reset the in_process bit of a die. */
8219 reset_die_in_process (void *arg
)
8221 struct die_info
*die
= arg
;
8223 die
->in_process
= 0;
8226 /* Process a die and its children. */
8229 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8231 struct cleanup
*in_process
;
8233 /* We should only be processing those not already in process. */
8234 gdb_assert (!die
->in_process
);
8236 die
->in_process
= 1;
8237 in_process
= make_cleanup (reset_die_in_process
,die
);
8241 case DW_TAG_padding
:
8243 case DW_TAG_compile_unit
:
8244 case DW_TAG_partial_unit
:
8245 read_file_scope (die
, cu
);
8247 case DW_TAG_type_unit
:
8248 read_type_unit_scope (die
, cu
);
8250 case DW_TAG_subprogram
:
8251 case DW_TAG_inlined_subroutine
:
8252 read_func_scope (die
, cu
);
8254 case DW_TAG_lexical_block
:
8255 case DW_TAG_try_block
:
8256 case DW_TAG_catch_block
:
8257 read_lexical_block_scope (die
, cu
);
8259 case DW_TAG_GNU_call_site
:
8260 read_call_site_scope (die
, cu
);
8262 case DW_TAG_class_type
:
8263 case DW_TAG_interface_type
:
8264 case DW_TAG_structure_type
:
8265 case DW_TAG_union_type
:
8266 process_structure_scope (die
, cu
);
8268 case DW_TAG_enumeration_type
:
8269 process_enumeration_scope (die
, cu
);
8272 /* These dies have a type, but processing them does not create
8273 a symbol or recurse to process the children. Therefore we can
8274 read them on-demand through read_type_die. */
8275 case DW_TAG_subroutine_type
:
8276 case DW_TAG_set_type
:
8277 case DW_TAG_array_type
:
8278 case DW_TAG_pointer_type
:
8279 case DW_TAG_ptr_to_member_type
:
8280 case DW_TAG_reference_type
:
8281 case DW_TAG_string_type
:
8284 case DW_TAG_base_type
:
8285 case DW_TAG_subrange_type
:
8286 case DW_TAG_typedef
:
8287 /* Add a typedef symbol for the type definition, if it has a
8289 new_symbol (die
, read_type_die (die
, cu
), cu
);
8291 case DW_TAG_common_block
:
8292 read_common_block (die
, cu
);
8294 case DW_TAG_common_inclusion
:
8296 case DW_TAG_namespace
:
8297 cu
->processing_has_namespace_info
= 1;
8298 read_namespace (die
, cu
);
8301 cu
->processing_has_namespace_info
= 1;
8302 read_module (die
, cu
);
8304 case DW_TAG_imported_declaration
:
8305 cu
->processing_has_namespace_info
= 1;
8306 if (read_namespace_alias (die
, cu
))
8308 /* The declaration is not a global namespace alias: fall through. */
8309 case DW_TAG_imported_module
:
8310 cu
->processing_has_namespace_info
= 1;
8311 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8312 || cu
->language
!= language_fortran
))
8313 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8314 dwarf_tag_name (die
->tag
));
8315 read_import_statement (die
, cu
);
8318 case DW_TAG_imported_unit
:
8319 process_imported_unit_die (die
, cu
);
8323 new_symbol (die
, NULL
, cu
);
8327 do_cleanups (in_process
);
8330 /* DWARF name computation. */
8332 /* A helper function for dwarf2_compute_name which determines whether DIE
8333 needs to have the name of the scope prepended to the name listed in the
8337 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8339 struct attribute
*attr
;
8343 case DW_TAG_namespace
:
8344 case DW_TAG_typedef
:
8345 case DW_TAG_class_type
:
8346 case DW_TAG_interface_type
:
8347 case DW_TAG_structure_type
:
8348 case DW_TAG_union_type
:
8349 case DW_TAG_enumeration_type
:
8350 case DW_TAG_enumerator
:
8351 case DW_TAG_subprogram
:
8353 case DW_TAG_imported_declaration
:
8356 case DW_TAG_variable
:
8357 case DW_TAG_constant
:
8358 /* We only need to prefix "globally" visible variables. These include
8359 any variable marked with DW_AT_external or any variable that
8360 lives in a namespace. [Variables in anonymous namespaces
8361 require prefixing, but they are not DW_AT_external.] */
8363 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8365 struct dwarf2_cu
*spec_cu
= cu
;
8367 return die_needs_namespace (die_specification (die
, &spec_cu
),
8371 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8372 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8373 && die
->parent
->tag
!= DW_TAG_module
)
8375 /* A variable in a lexical block of some kind does not need a
8376 namespace, even though in C++ such variables may be external
8377 and have a mangled name. */
8378 if (die
->parent
->tag
== DW_TAG_lexical_block
8379 || die
->parent
->tag
== DW_TAG_try_block
8380 || die
->parent
->tag
== DW_TAG_catch_block
8381 || die
->parent
->tag
== DW_TAG_subprogram
)
8390 /* Retrieve the last character from a mem_file. */
8393 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8395 char *last_char_p
= (char *) object
;
8398 *last_char_p
= buffer
[length
- 1];
8401 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8402 compute the physname for the object, which include a method's:
8403 - formal parameters (C++/Java),
8404 - receiver type (Go),
8405 - return type (Java).
8407 The term "physname" is a bit confusing.
8408 For C++, for example, it is the demangled name.
8409 For Go, for example, it's the mangled name.
8411 For Ada, return the DIE's linkage name rather than the fully qualified
8412 name. PHYSNAME is ignored..
8414 The result is allocated on the objfile_obstack and canonicalized. */
8417 dwarf2_compute_name (const char *name
,
8418 struct die_info
*die
, struct dwarf2_cu
*cu
,
8421 struct objfile
*objfile
= cu
->objfile
;
8424 name
= dwarf2_name (die
, cu
);
8426 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8427 compute it by typename_concat inside GDB. */
8428 if (cu
->language
== language_ada
8429 || (cu
->language
== language_fortran
&& physname
))
8431 /* For Ada unit, we prefer the linkage name over the name, as
8432 the former contains the exported name, which the user expects
8433 to be able to reference. Ideally, we want the user to be able
8434 to reference this entity using either natural or linkage name,
8435 but we haven't started looking at this enhancement yet. */
8436 struct attribute
*attr
;
8438 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8440 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8441 if (attr
&& DW_STRING (attr
))
8442 return DW_STRING (attr
);
8445 /* These are the only languages we know how to qualify names in. */
8447 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8448 || cu
->language
== language_fortran
))
8450 if (die_needs_namespace (die
, cu
))
8454 struct ui_file
*buf
;
8455 char *intermediate_name
;
8456 const char *canonical_name
= NULL
;
8458 prefix
= determine_prefix (die
, cu
);
8459 buf
= mem_fileopen ();
8460 if (*prefix
!= '\0')
8462 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8465 fputs_unfiltered (prefixed_name
, buf
);
8466 xfree (prefixed_name
);
8469 fputs_unfiltered (name
, buf
);
8471 /* Template parameters may be specified in the DIE's DW_AT_name, or
8472 as children with DW_TAG_template_type_param or
8473 DW_TAG_value_type_param. If the latter, add them to the name
8474 here. If the name already has template parameters, then
8475 skip this step; some versions of GCC emit both, and
8476 it is more efficient to use the pre-computed name.
8478 Something to keep in mind about this process: it is very
8479 unlikely, or in some cases downright impossible, to produce
8480 something that will match the mangled name of a function.
8481 If the definition of the function has the same debug info,
8482 we should be able to match up with it anyway. But fallbacks
8483 using the minimal symbol, for instance to find a method
8484 implemented in a stripped copy of libstdc++, will not work.
8485 If we do not have debug info for the definition, we will have to
8486 match them up some other way.
8488 When we do name matching there is a related problem with function
8489 templates; two instantiated function templates are allowed to
8490 differ only by their return types, which we do not add here. */
8492 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8494 struct attribute
*attr
;
8495 struct die_info
*child
;
8498 die
->building_fullname
= 1;
8500 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8504 const gdb_byte
*bytes
;
8505 struct dwarf2_locexpr_baton
*baton
;
8508 if (child
->tag
!= DW_TAG_template_type_param
8509 && child
->tag
!= DW_TAG_template_value_param
)
8514 fputs_unfiltered ("<", buf
);
8518 fputs_unfiltered (", ", buf
);
8520 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8523 complaint (&symfile_complaints
,
8524 _("template parameter missing DW_AT_type"));
8525 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8528 type
= die_type (child
, cu
);
8530 if (child
->tag
== DW_TAG_template_type_param
)
8532 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8536 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8539 complaint (&symfile_complaints
,
8540 _("template parameter missing "
8541 "DW_AT_const_value"));
8542 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8546 dwarf2_const_value_attr (attr
, type
, name
,
8547 &cu
->comp_unit_obstack
, cu
,
8548 &value
, &bytes
, &baton
);
8550 if (TYPE_NOSIGN (type
))
8551 /* GDB prints characters as NUMBER 'CHAR'. If that's
8552 changed, this can use value_print instead. */
8553 c_printchar (value
, type
, buf
);
8556 struct value_print_options opts
;
8559 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8563 else if (bytes
!= NULL
)
8565 v
= allocate_value (type
);
8566 memcpy (value_contents_writeable (v
), bytes
,
8567 TYPE_LENGTH (type
));
8570 v
= value_from_longest (type
, value
);
8572 /* Specify decimal so that we do not depend on
8574 get_formatted_print_options (&opts
, 'd');
8576 value_print (v
, buf
, &opts
);
8582 die
->building_fullname
= 0;
8586 /* Close the argument list, with a space if necessary
8587 (nested templates). */
8588 char last_char
= '\0';
8589 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8590 if (last_char
== '>')
8591 fputs_unfiltered (" >", buf
);
8593 fputs_unfiltered (">", buf
);
8597 /* For Java and C++ methods, append formal parameter type
8598 information, if PHYSNAME. */
8600 if (physname
&& die
->tag
== DW_TAG_subprogram
8601 && (cu
->language
== language_cplus
8602 || cu
->language
== language_java
))
8604 struct type
*type
= read_type_die (die
, cu
);
8606 c_type_print_args (type
, buf
, 1, cu
->language
,
8607 &type_print_raw_options
);
8609 if (cu
->language
== language_java
)
8611 /* For java, we must append the return type to method
8613 if (die
->tag
== DW_TAG_subprogram
)
8614 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8615 0, 0, &type_print_raw_options
);
8617 else if (cu
->language
== language_cplus
)
8619 /* Assume that an artificial first parameter is
8620 "this", but do not crash if it is not. RealView
8621 marks unnamed (and thus unused) parameters as
8622 artificial; there is no way to differentiate
8624 if (TYPE_NFIELDS (type
) > 0
8625 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8626 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8627 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8629 fputs_unfiltered (" const", buf
);
8633 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8634 ui_file_delete (buf
);
8636 if (cu
->language
== language_cplus
)
8638 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8639 &objfile
->per_bfd
->storage_obstack
);
8641 /* If we only computed INTERMEDIATE_NAME, or if
8642 INTERMEDIATE_NAME is already canonical, then we need to
8643 copy it to the appropriate obstack. */
8644 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8645 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8647 strlen (intermediate_name
));
8649 name
= canonical_name
;
8651 xfree (intermediate_name
);
8658 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8659 If scope qualifiers are appropriate they will be added. The result
8660 will be allocated on the storage_obstack, or NULL if the DIE does
8661 not have a name. NAME may either be from a previous call to
8662 dwarf2_name or NULL.
8664 The output string will be canonicalized (if C++/Java). */
8667 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8669 return dwarf2_compute_name (name
, die
, cu
, 0);
8672 /* Construct a physname for the given DIE in CU. NAME may either be
8673 from a previous call to dwarf2_name or NULL. The result will be
8674 allocated on the objfile_objstack or NULL if the DIE does not have a
8677 The output string will be canonicalized (if C++/Java). */
8680 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8682 struct objfile
*objfile
= cu
->objfile
;
8683 struct attribute
*attr
;
8684 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8685 struct cleanup
*back_to
;
8688 /* In this case dwarf2_compute_name is just a shortcut not building anything
8690 if (!die_needs_namespace (die
, cu
))
8691 return dwarf2_compute_name (name
, die
, cu
, 1);
8693 back_to
= make_cleanup (null_cleanup
, NULL
);
8695 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8697 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8699 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8701 if (attr
&& DW_STRING (attr
))
8705 mangled
= DW_STRING (attr
);
8707 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8708 type. It is easier for GDB users to search for such functions as
8709 `name(params)' than `long name(params)'. In such case the minimal
8710 symbol names do not match the full symbol names but for template
8711 functions there is never a need to look up their definition from their
8712 declaration so the only disadvantage remains the minimal symbol
8713 variant `long name(params)' does not have the proper inferior type.
8716 if (cu
->language
== language_go
)
8718 /* This is a lie, but we already lie to the caller new_symbol_full.
8719 new_symbol_full assumes we return the mangled name.
8720 This just undoes that lie until things are cleaned up. */
8725 demangled
= gdb_demangle (mangled
,
8726 (DMGL_PARAMS
| DMGL_ANSI
8727 | (cu
->language
== language_java
8728 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8733 make_cleanup (xfree
, demangled
);
8743 if (canon
== NULL
|| check_physname
)
8745 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8747 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8749 /* It may not mean a bug in GDB. The compiler could also
8750 compute DW_AT_linkage_name incorrectly. But in such case
8751 GDB would need to be bug-to-bug compatible. */
8753 complaint (&symfile_complaints
,
8754 _("Computed physname <%s> does not match demangled <%s> "
8755 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8756 physname
, canon
, mangled
, die
->offset
.sect_off
,
8757 objfile_name (objfile
));
8759 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8760 is available here - over computed PHYSNAME. It is safer
8761 against both buggy GDB and buggy compilers. */
8775 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8776 retval
, strlen (retval
));
8778 do_cleanups (back_to
);
8782 /* Inspect DIE in CU for a namespace alias. If one exists, record
8783 a new symbol for it.
8785 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8788 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8790 struct attribute
*attr
;
8792 /* If the die does not have a name, this is not a namespace
8794 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8798 struct die_info
*d
= die
;
8799 struct dwarf2_cu
*imported_cu
= cu
;
8801 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8802 keep inspecting DIEs until we hit the underlying import. */
8803 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8804 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8806 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8810 d
= follow_die_ref (d
, attr
, &imported_cu
);
8811 if (d
->tag
!= DW_TAG_imported_declaration
)
8815 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8817 complaint (&symfile_complaints
,
8818 _("DIE at 0x%x has too many recursively imported "
8819 "declarations"), d
->offset
.sect_off
);
8826 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8828 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8829 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8831 /* This declaration is a global namespace alias. Add
8832 a symbol for it whose type is the aliased namespace. */
8833 new_symbol (die
, type
, cu
);
8842 /* Read the import statement specified by the given die and record it. */
8845 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8847 struct objfile
*objfile
= cu
->objfile
;
8848 struct attribute
*import_attr
;
8849 struct die_info
*imported_die
, *child_die
;
8850 struct dwarf2_cu
*imported_cu
;
8851 const char *imported_name
;
8852 const char *imported_name_prefix
;
8853 const char *canonical_name
;
8854 const char *import_alias
;
8855 const char *imported_declaration
= NULL
;
8856 const char *import_prefix
;
8857 VEC (const_char_ptr
) *excludes
= NULL
;
8858 struct cleanup
*cleanups
;
8860 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8861 if (import_attr
== NULL
)
8863 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8864 dwarf_tag_name (die
->tag
));
8869 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8870 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8871 if (imported_name
== NULL
)
8873 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8875 The import in the following code:
8889 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8890 <52> DW_AT_decl_file : 1
8891 <53> DW_AT_decl_line : 6
8892 <54> DW_AT_import : <0x75>
8893 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8895 <5b> DW_AT_decl_file : 1
8896 <5c> DW_AT_decl_line : 2
8897 <5d> DW_AT_type : <0x6e>
8899 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8900 <76> DW_AT_byte_size : 4
8901 <77> DW_AT_encoding : 5 (signed)
8903 imports the wrong die ( 0x75 instead of 0x58 ).
8904 This case will be ignored until the gcc bug is fixed. */
8908 /* Figure out the local name after import. */
8909 import_alias
= dwarf2_name (die
, cu
);
8911 /* Figure out where the statement is being imported to. */
8912 import_prefix
= determine_prefix (die
, cu
);
8914 /* Figure out what the scope of the imported die is and prepend it
8915 to the name of the imported die. */
8916 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8918 if (imported_die
->tag
!= DW_TAG_namespace
8919 && imported_die
->tag
!= DW_TAG_module
)
8921 imported_declaration
= imported_name
;
8922 canonical_name
= imported_name_prefix
;
8924 else if (strlen (imported_name_prefix
) > 0)
8925 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8926 imported_name_prefix
, "::", imported_name
,
8929 canonical_name
= imported_name
;
8931 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8933 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8934 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8935 child_die
= sibling_die (child_die
))
8937 /* DWARF-4: A Fortran use statement with a “rename list” may be
8938 represented by an imported module entry with an import attribute
8939 referring to the module and owned entries corresponding to those
8940 entities that are renamed as part of being imported. */
8942 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8944 complaint (&symfile_complaints
,
8945 _("child DW_TAG_imported_declaration expected "
8946 "- DIE at 0x%x [in module %s]"),
8947 child_die
->offset
.sect_off
, objfile_name (objfile
));
8951 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8952 if (import_attr
== NULL
)
8954 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8955 dwarf_tag_name (child_die
->tag
));
8960 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8962 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8963 if (imported_name
== NULL
)
8965 complaint (&symfile_complaints
,
8966 _("child DW_TAG_imported_declaration has unknown "
8967 "imported name - DIE at 0x%x [in module %s]"),
8968 child_die
->offset
.sect_off
, objfile_name (objfile
));
8972 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8974 process_die (child_die
, cu
);
8977 cp_add_using_directive (import_prefix
,
8980 imported_declaration
,
8983 &objfile
->objfile_obstack
);
8985 do_cleanups (cleanups
);
8988 /* Cleanup function for handle_DW_AT_stmt_list. */
8991 free_cu_line_header (void *arg
)
8993 struct dwarf2_cu
*cu
= arg
;
8995 free_line_header (cu
->line_header
);
8996 cu
->line_header
= NULL
;
8999 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9000 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9001 this, it was first present in GCC release 4.3.0. */
9004 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9006 if (!cu
->checked_producer
)
9007 check_producer (cu
);
9009 return cu
->producer_is_gcc_lt_4_3
;
9013 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9014 const char **name
, const char **comp_dir
)
9016 struct attribute
*attr
;
9021 /* Find the filename. Do not use dwarf2_name here, since the filename
9022 is not a source language identifier. */
9023 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9026 *name
= DW_STRING (attr
);
9029 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9031 *comp_dir
= DW_STRING (attr
);
9032 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9033 && IS_ABSOLUTE_PATH (*name
))
9035 char *d
= ldirname (*name
);
9039 make_cleanup (xfree
, d
);
9041 if (*comp_dir
!= NULL
)
9043 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9044 directory, get rid of it. */
9045 char *cp
= strchr (*comp_dir
, ':');
9047 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9052 *name
= "<unknown>";
9055 /* Handle DW_AT_stmt_list for a compilation unit.
9056 DIE is the DW_TAG_compile_unit die for CU.
9057 COMP_DIR is the compilation directory. LOWPC is passed to
9058 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9061 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9062 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9064 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9065 struct attribute
*attr
;
9066 unsigned int line_offset
;
9067 struct line_header line_header_local
;
9068 hashval_t line_header_local_hash
;
9073 gdb_assert (! cu
->per_cu
->is_debug_types
);
9075 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9079 line_offset
= DW_UNSND (attr
);
9081 /* The line header hash table is only created if needed (it exists to
9082 prevent redundant reading of the line table for partial_units).
9083 If we're given a partial_unit, we'll need it. If we're given a
9084 compile_unit, then use the line header hash table if it's already
9085 created, but don't create one just yet. */
9087 if (dwarf2_per_objfile
->line_header_hash
== NULL
9088 && die
->tag
== DW_TAG_partial_unit
)
9090 dwarf2_per_objfile
->line_header_hash
9091 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9092 line_header_eq_voidp
,
9093 free_line_header_voidp
,
9094 &objfile
->objfile_obstack
,
9095 hashtab_obstack_allocate
,
9096 dummy_obstack_deallocate
);
9099 line_header_local
.offset
.sect_off
= line_offset
;
9100 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9101 line_header_local_hash
= line_header_hash (&line_header_local
);
9102 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9104 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9106 line_header_local_hash
, NO_INSERT
);
9108 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9109 is not present in *SLOT (since if there is something in *SLOT then
9110 it will be for a partial_unit). */
9111 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9113 gdb_assert (*slot
!= NULL
);
9114 cu
->line_header
= *slot
;
9119 /* dwarf_decode_line_header does not yet provide sufficient information.
9120 We always have to call also dwarf_decode_lines for it. */
9121 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9122 if (cu
->line_header
== NULL
)
9125 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9129 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9131 line_header_local_hash
, INSERT
);
9132 gdb_assert (slot
!= NULL
);
9134 if (slot
!= NULL
&& *slot
== NULL
)
9136 /* This newly decoded line number information unit will be owned
9137 by line_header_hash hash table. */
9138 *slot
= cu
->line_header
;
9142 /* We cannot free any current entry in (*slot) as that struct line_header
9143 may be already used by multiple CUs. Create only temporary decoded
9144 line_header for this CU - it may happen at most once for each line
9145 number information unit. And if we're not using line_header_hash
9146 then this is what we want as well. */
9147 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9148 make_cleanup (free_cu_line_header
, cu
);
9150 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9151 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9155 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9158 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9160 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9161 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9162 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9163 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9164 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9165 struct attribute
*attr
;
9166 const char *name
= NULL
;
9167 const char *comp_dir
= NULL
;
9168 struct die_info
*child_die
;
9169 bfd
*abfd
= objfile
->obfd
;
9172 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9174 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9176 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9177 from finish_block. */
9178 if (lowpc
== ((CORE_ADDR
) -1))
9180 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9182 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9184 prepare_one_comp_unit (cu
, die
, cu
->language
);
9186 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9187 standardised yet. As a workaround for the language detection we fall
9188 back to the DW_AT_producer string. */
9189 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9190 cu
->language
= language_opencl
;
9192 /* Similar hack for Go. */
9193 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9194 set_cu_language (DW_LANG_Go
, cu
);
9196 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9198 /* Decode line number information if present. We do this before
9199 processing child DIEs, so that the line header table is available
9200 for DW_AT_decl_file. */
9201 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9203 /* Process all dies in compilation unit. */
9204 if (die
->child
!= NULL
)
9206 child_die
= die
->child
;
9207 while (child_die
&& child_die
->tag
)
9209 process_die (child_die
, cu
);
9210 child_die
= sibling_die (child_die
);
9214 /* Decode macro information, if present. Dwarf 2 macro information
9215 refers to information in the line number info statement program
9216 header, so we can only read it if we've read the header
9218 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9219 if (attr
&& cu
->line_header
)
9221 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9222 complaint (&symfile_complaints
,
9223 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9225 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9229 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9230 if (attr
&& cu
->line_header
)
9232 unsigned int macro_offset
= DW_UNSND (attr
);
9234 dwarf_decode_macros (cu
, macro_offset
, 0);
9238 do_cleanups (back_to
);
9241 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9242 Create the set of symtabs used by this TU, or if this TU is sharing
9243 symtabs with another TU and the symtabs have already been created
9244 then restore those symtabs in the line header.
9245 We don't need the pc/line-number mapping for type units. */
9248 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9250 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9251 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9252 struct type_unit_group
*tu_group
;
9254 struct line_header
*lh
;
9255 struct attribute
*attr
;
9256 unsigned int i
, line_offset
;
9257 struct signatured_type
*sig_type
;
9259 gdb_assert (per_cu
->is_debug_types
);
9260 sig_type
= (struct signatured_type
*) per_cu
;
9262 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9264 /* If we're using .gdb_index (includes -readnow) then
9265 per_cu->type_unit_group may not have been set up yet. */
9266 if (sig_type
->type_unit_group
== NULL
)
9267 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9268 tu_group
= sig_type
->type_unit_group
;
9270 /* If we've already processed this stmt_list there's no real need to
9271 do it again, we could fake it and just recreate the part we need
9272 (file name,index -> symtab mapping). If data shows this optimization
9273 is useful we can do it then. */
9274 first_time
= tu_group
->compunit_symtab
== NULL
;
9276 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9281 line_offset
= DW_UNSND (attr
);
9282 lh
= dwarf_decode_line_header (line_offset
, cu
);
9287 dwarf2_start_symtab (cu
, "", NULL
, 0);
9290 gdb_assert (tu_group
->symtabs
== NULL
);
9291 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9296 cu
->line_header
= lh
;
9297 make_cleanup (free_cu_line_header
, cu
);
9301 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9303 tu_group
->num_symtabs
= lh
->num_file_names
;
9304 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9306 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9308 const char *dir
= NULL
;
9309 struct file_entry
*fe
= &lh
->file_names
[i
];
9312 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9313 dwarf2_start_subfile (fe
->name
, dir
);
9315 if (current_subfile
->symtab
== NULL
)
9317 /* NOTE: start_subfile will recognize when it's been passed
9318 a file it has already seen. So we can't assume there's a
9319 simple mapping from lh->file_names to subfiles, plus
9320 lh->file_names may contain dups. */
9321 current_subfile
->symtab
9322 = allocate_symtab (cust
, current_subfile
->name
);
9325 fe
->symtab
= current_subfile
->symtab
;
9326 tu_group
->symtabs
[i
] = fe
->symtab
;
9331 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9333 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9335 struct file_entry
*fe
= &lh
->file_names
[i
];
9337 fe
->symtab
= tu_group
->symtabs
[i
];
9341 /* The main symtab is allocated last. Type units don't have DW_AT_name
9342 so they don't have a "real" (so to speak) symtab anyway.
9343 There is later code that will assign the main symtab to all symbols
9344 that don't have one. We need to handle the case of a symbol with a
9345 missing symtab (DW_AT_decl_file) anyway. */
9348 /* Process DW_TAG_type_unit.
9349 For TUs we want to skip the first top level sibling if it's not the
9350 actual type being defined by this TU. In this case the first top
9351 level sibling is there to provide context only. */
9354 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9356 struct die_info
*child_die
;
9358 prepare_one_comp_unit (cu
, die
, language_minimal
);
9360 /* Initialize (or reinitialize) the machinery for building symtabs.
9361 We do this before processing child DIEs, so that the line header table
9362 is available for DW_AT_decl_file. */
9363 setup_type_unit_groups (die
, cu
);
9365 if (die
->child
!= NULL
)
9367 child_die
= die
->child
;
9368 while (child_die
&& child_die
->tag
)
9370 process_die (child_die
, cu
);
9371 child_die
= sibling_die (child_die
);
9378 http://gcc.gnu.org/wiki/DebugFission
9379 http://gcc.gnu.org/wiki/DebugFissionDWP
9381 To simplify handling of both DWO files ("object" files with the DWARF info)
9382 and DWP files (a file with the DWOs packaged up into one file), we treat
9383 DWP files as having a collection of virtual DWO files. */
9386 hash_dwo_file (const void *item
)
9388 const struct dwo_file
*dwo_file
= item
;
9391 hash
= htab_hash_string (dwo_file
->dwo_name
);
9392 if (dwo_file
->comp_dir
!= NULL
)
9393 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9398 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9400 const struct dwo_file
*lhs
= item_lhs
;
9401 const struct dwo_file
*rhs
= item_rhs
;
9403 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9405 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9406 return lhs
->comp_dir
== rhs
->comp_dir
;
9407 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9410 /* Allocate a hash table for DWO files. */
9413 allocate_dwo_file_hash_table (void)
9415 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9417 return htab_create_alloc_ex (41,
9421 &objfile
->objfile_obstack
,
9422 hashtab_obstack_allocate
,
9423 dummy_obstack_deallocate
);
9426 /* Lookup DWO file DWO_NAME. */
9429 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9431 struct dwo_file find_entry
;
9434 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9435 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9437 memset (&find_entry
, 0, sizeof (find_entry
));
9438 find_entry
.dwo_name
= dwo_name
;
9439 find_entry
.comp_dir
= comp_dir
;
9440 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9446 hash_dwo_unit (const void *item
)
9448 const struct dwo_unit
*dwo_unit
= item
;
9450 /* This drops the top 32 bits of the id, but is ok for a hash. */
9451 return dwo_unit
->signature
;
9455 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9457 const struct dwo_unit
*lhs
= item_lhs
;
9458 const struct dwo_unit
*rhs
= item_rhs
;
9460 /* The signature is assumed to be unique within the DWO file.
9461 So while object file CU dwo_id's always have the value zero,
9462 that's OK, assuming each object file DWO file has only one CU,
9463 and that's the rule for now. */
9464 return lhs
->signature
== rhs
->signature
;
9467 /* Allocate a hash table for DWO CUs,TUs.
9468 There is one of these tables for each of CUs,TUs for each DWO file. */
9471 allocate_dwo_unit_table (struct objfile
*objfile
)
9473 /* Start out with a pretty small number.
9474 Generally DWO files contain only one CU and maybe some TUs. */
9475 return htab_create_alloc_ex (3,
9479 &objfile
->objfile_obstack
,
9480 hashtab_obstack_allocate
,
9481 dummy_obstack_deallocate
);
9484 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9486 struct create_dwo_cu_data
9488 struct dwo_file
*dwo_file
;
9489 struct dwo_unit dwo_unit
;
9492 /* die_reader_func for create_dwo_cu. */
9495 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9496 const gdb_byte
*info_ptr
,
9497 struct die_info
*comp_unit_die
,
9501 struct dwarf2_cu
*cu
= reader
->cu
;
9502 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9503 sect_offset offset
= cu
->per_cu
->offset
;
9504 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9505 struct create_dwo_cu_data
*data
= datap
;
9506 struct dwo_file
*dwo_file
= data
->dwo_file
;
9507 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9508 struct attribute
*attr
;
9510 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9513 complaint (&symfile_complaints
,
9514 _("Dwarf Error: debug entry at offset 0x%x is missing"
9515 " its dwo_id [in module %s]"),
9516 offset
.sect_off
, dwo_file
->dwo_name
);
9520 dwo_unit
->dwo_file
= dwo_file
;
9521 dwo_unit
->signature
= DW_UNSND (attr
);
9522 dwo_unit
->section
= section
;
9523 dwo_unit
->offset
= offset
;
9524 dwo_unit
->length
= cu
->per_cu
->length
;
9526 if (dwarf2_read_debug
)
9527 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9528 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9531 /* Create the dwo_unit for the lone CU in DWO_FILE.
9532 Note: This function processes DWO files only, not DWP files. */
9534 static struct dwo_unit
*
9535 create_dwo_cu (struct dwo_file
*dwo_file
)
9537 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9538 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9541 const gdb_byte
*info_ptr
, *end_ptr
;
9542 struct create_dwo_cu_data create_dwo_cu_data
;
9543 struct dwo_unit
*dwo_unit
;
9545 dwarf2_read_section (objfile
, section
);
9546 info_ptr
= section
->buffer
;
9548 if (info_ptr
== NULL
)
9551 /* We can't set abfd until now because the section may be empty or
9552 not present, in which case section->asection will be NULL. */
9553 abfd
= get_section_bfd_owner (section
);
9555 if (dwarf2_read_debug
)
9557 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9558 get_section_name (section
),
9559 get_section_file_name (section
));
9562 create_dwo_cu_data
.dwo_file
= dwo_file
;
9565 end_ptr
= info_ptr
+ section
->size
;
9566 while (info_ptr
< end_ptr
)
9568 struct dwarf2_per_cu_data per_cu
;
9570 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9571 sizeof (create_dwo_cu_data
.dwo_unit
));
9572 memset (&per_cu
, 0, sizeof (per_cu
));
9573 per_cu
.objfile
= objfile
;
9574 per_cu
.is_debug_types
= 0;
9575 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9576 per_cu
.section
= section
;
9578 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9579 create_dwo_cu_reader
,
9580 &create_dwo_cu_data
);
9582 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9584 /* If we've already found one, complain. We only support one
9585 because having more than one requires hacking the dwo_name of
9586 each to match, which is highly unlikely to happen. */
9587 if (dwo_unit
!= NULL
)
9589 complaint (&symfile_complaints
,
9590 _("Multiple CUs in DWO file %s [in module %s]"),
9591 dwo_file
->dwo_name
, objfile_name (objfile
));
9595 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9596 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9599 info_ptr
+= per_cu
.length
;
9605 /* DWP file .debug_{cu,tu}_index section format:
9606 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9610 Both index sections have the same format, and serve to map a 64-bit
9611 signature to a set of section numbers. Each section begins with a header,
9612 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9613 indexes, and a pool of 32-bit section numbers. The index sections will be
9614 aligned at 8-byte boundaries in the file.
9616 The index section header consists of:
9618 V, 32 bit version number
9620 N, 32 bit number of compilation units or type units in the index
9621 M, 32 bit number of slots in the hash table
9623 Numbers are recorded using the byte order of the application binary.
9625 The hash table begins at offset 16 in the section, and consists of an array
9626 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9627 order of the application binary). Unused slots in the hash table are 0.
9628 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9630 The parallel table begins immediately after the hash table
9631 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9632 array of 32-bit indexes (using the byte order of the application binary),
9633 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9634 table contains a 32-bit index into the pool of section numbers. For unused
9635 hash table slots, the corresponding entry in the parallel table will be 0.
9637 The pool of section numbers begins immediately following the hash table
9638 (at offset 16 + 12 * M from the beginning of the section). The pool of
9639 section numbers consists of an array of 32-bit words (using the byte order
9640 of the application binary). Each item in the array is indexed starting
9641 from 0. The hash table entry provides the index of the first section
9642 number in the set. Additional section numbers in the set follow, and the
9643 set is terminated by a 0 entry (section number 0 is not used in ELF).
9645 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9646 section must be the first entry in the set, and the .debug_abbrev.dwo must
9647 be the second entry. Other members of the set may follow in any order.
9653 DWP Version 2 combines all the .debug_info, etc. sections into one,
9654 and the entries in the index tables are now offsets into these sections.
9655 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9658 Index Section Contents:
9660 Hash Table of Signatures dwp_hash_table.hash_table
9661 Parallel Table of Indices dwp_hash_table.unit_table
9662 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9663 Table of Section Sizes dwp_hash_table.v2.sizes
9665 The index section header consists of:
9667 V, 32 bit version number
9668 L, 32 bit number of columns in the table of section offsets
9669 N, 32 bit number of compilation units or type units in the index
9670 M, 32 bit number of slots in the hash table
9672 Numbers are recorded using the byte order of the application binary.
9674 The hash table has the same format as version 1.
9675 The parallel table of indices has the same format as version 1,
9676 except that the entries are origin-1 indices into the table of sections
9677 offsets and the table of section sizes.
9679 The table of offsets begins immediately following the parallel table
9680 (at offset 16 + 12 * M from the beginning of the section). The table is
9681 a two-dimensional array of 32-bit words (using the byte order of the
9682 application binary), with L columns and N+1 rows, in row-major order.
9683 Each row in the array is indexed starting from 0. The first row provides
9684 a key to the remaining rows: each column in this row provides an identifier
9685 for a debug section, and the offsets in the same column of subsequent rows
9686 refer to that section. The section identifiers are:
9688 DW_SECT_INFO 1 .debug_info.dwo
9689 DW_SECT_TYPES 2 .debug_types.dwo
9690 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9691 DW_SECT_LINE 4 .debug_line.dwo
9692 DW_SECT_LOC 5 .debug_loc.dwo
9693 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9694 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9695 DW_SECT_MACRO 8 .debug_macro.dwo
9697 The offsets provided by the CU and TU index sections are the base offsets
9698 for the contributions made by each CU or TU to the corresponding section
9699 in the package file. Each CU and TU header contains an abbrev_offset
9700 field, used to find the abbreviations table for that CU or TU within the
9701 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9702 be interpreted as relative to the base offset given in the index section.
9703 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9704 should be interpreted as relative to the base offset for .debug_line.dwo,
9705 and offsets into other debug sections obtained from DWARF attributes should
9706 also be interpreted as relative to the corresponding base offset.
9708 The table of sizes begins immediately following the table of offsets.
9709 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9710 with L columns and N rows, in row-major order. Each row in the array is
9711 indexed starting from 1 (row 0 is shared by the two tables).
9715 Hash table lookup is handled the same in version 1 and 2:
9717 We assume that N and M will not exceed 2^32 - 1.
9718 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9720 Given a 64-bit compilation unit signature or a type signature S, an entry
9721 in the hash table is located as follows:
9723 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9724 the low-order k bits all set to 1.
9726 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9728 3) If the hash table entry at index H matches the signature, use that
9729 entry. If the hash table entry at index H is unused (all zeroes),
9730 terminate the search: the signature is not present in the table.
9732 4) Let H = (H + H') modulo M. Repeat at Step 3.
9734 Because M > N and H' and M are relatively prime, the search is guaranteed
9735 to stop at an unused slot or find the match. */
9737 /* Create a hash table to map DWO IDs to their CU/TU entry in
9738 .debug_{info,types}.dwo in DWP_FILE.
9739 Returns NULL if there isn't one.
9740 Note: This function processes DWP files only, not DWO files. */
9742 static struct dwp_hash_table
*
9743 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9745 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9746 bfd
*dbfd
= dwp_file
->dbfd
;
9747 const gdb_byte
*index_ptr
, *index_end
;
9748 struct dwarf2_section_info
*index
;
9749 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9750 struct dwp_hash_table
*htab
;
9753 index
= &dwp_file
->sections
.tu_index
;
9755 index
= &dwp_file
->sections
.cu_index
;
9757 if (dwarf2_section_empty_p (index
))
9759 dwarf2_read_section (objfile
, index
);
9761 index_ptr
= index
->buffer
;
9762 index_end
= index_ptr
+ index
->size
;
9764 version
= read_4_bytes (dbfd
, index_ptr
);
9767 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9771 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9773 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9776 if (version
!= 1 && version
!= 2)
9778 error (_("Dwarf Error: unsupported DWP file version (%s)"
9780 pulongest (version
), dwp_file
->name
);
9782 if (nr_slots
!= (nr_slots
& -nr_slots
))
9784 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9785 " is not power of 2 [in module %s]"),
9786 pulongest (nr_slots
), dwp_file
->name
);
9789 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9790 htab
->version
= version
;
9791 htab
->nr_columns
= nr_columns
;
9792 htab
->nr_units
= nr_units
;
9793 htab
->nr_slots
= nr_slots
;
9794 htab
->hash_table
= index_ptr
;
9795 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9797 /* Exit early if the table is empty. */
9798 if (nr_slots
== 0 || nr_units
== 0
9799 || (version
== 2 && nr_columns
== 0))
9801 /* All must be zero. */
9802 if (nr_slots
!= 0 || nr_units
!= 0
9803 || (version
== 2 && nr_columns
!= 0))
9805 complaint (&symfile_complaints
,
9806 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9807 " all zero [in modules %s]"),
9815 htab
->section_pool
.v1
.indices
=
9816 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9817 /* It's harder to decide whether the section is too small in v1.
9818 V1 is deprecated anyway so we punt. */
9822 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9823 int *ids
= htab
->section_pool
.v2
.section_ids
;
9824 /* Reverse map for error checking. */
9825 int ids_seen
[DW_SECT_MAX
+ 1];
9830 error (_("Dwarf Error: bad DWP hash table, too few columns"
9831 " in section table [in module %s]"),
9834 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9836 error (_("Dwarf Error: bad DWP hash table, too many columns"
9837 " in section table [in module %s]"),
9840 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9841 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9842 for (i
= 0; i
< nr_columns
; ++i
)
9844 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9846 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9848 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9849 " in section table [in module %s]"),
9850 id
, dwp_file
->name
);
9852 if (ids_seen
[id
] != -1)
9854 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9855 " id %d in section table [in module %s]"),
9856 id
, dwp_file
->name
);
9861 /* Must have exactly one info or types section. */
9862 if (((ids_seen
[DW_SECT_INFO
] != -1)
9863 + (ids_seen
[DW_SECT_TYPES
] != -1))
9866 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9867 " DWO info/types section [in module %s]"),
9870 /* Must have an abbrev section. */
9871 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9873 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9874 " section [in module %s]"),
9877 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9878 htab
->section_pool
.v2
.sizes
=
9879 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9880 * nr_units
* nr_columns
);
9881 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9882 * nr_units
* nr_columns
))
9885 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9894 /* Update SECTIONS with the data from SECTP.
9896 This function is like the other "locate" section routines that are
9897 passed to bfd_map_over_sections, but in this context the sections to
9898 read comes from the DWP V1 hash table, not the full ELF section table.
9900 The result is non-zero for success, or zero if an error was found. */
9903 locate_v1_virtual_dwo_sections (asection
*sectp
,
9904 struct virtual_v1_dwo_sections
*sections
)
9906 const struct dwop_section_names
*names
= &dwop_section_names
;
9908 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9910 /* There can be only one. */
9911 if (sections
->abbrev
.s
.asection
!= NULL
)
9913 sections
->abbrev
.s
.asection
= sectp
;
9914 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9916 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9917 || section_is_p (sectp
->name
, &names
->types_dwo
))
9919 /* There can be only one. */
9920 if (sections
->info_or_types
.s
.asection
!= NULL
)
9922 sections
->info_or_types
.s
.asection
= sectp
;
9923 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9925 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9927 /* There can be only one. */
9928 if (sections
->line
.s
.asection
!= NULL
)
9930 sections
->line
.s
.asection
= sectp
;
9931 sections
->line
.size
= bfd_get_section_size (sectp
);
9933 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9935 /* There can be only one. */
9936 if (sections
->loc
.s
.asection
!= NULL
)
9938 sections
->loc
.s
.asection
= sectp
;
9939 sections
->loc
.size
= bfd_get_section_size (sectp
);
9941 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9943 /* There can be only one. */
9944 if (sections
->macinfo
.s
.asection
!= NULL
)
9946 sections
->macinfo
.s
.asection
= sectp
;
9947 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9949 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9951 /* There can be only one. */
9952 if (sections
->macro
.s
.asection
!= NULL
)
9954 sections
->macro
.s
.asection
= sectp
;
9955 sections
->macro
.size
= bfd_get_section_size (sectp
);
9957 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9959 /* There can be only one. */
9960 if (sections
->str_offsets
.s
.asection
!= NULL
)
9962 sections
->str_offsets
.s
.asection
= sectp
;
9963 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9967 /* No other kind of section is valid. */
9974 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9975 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9976 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9977 This is for DWP version 1 files. */
9979 static struct dwo_unit
*
9980 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9981 uint32_t unit_index
,
9982 const char *comp_dir
,
9983 ULONGEST signature
, int is_debug_types
)
9985 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9986 const struct dwp_hash_table
*dwp_htab
=
9987 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9988 bfd
*dbfd
= dwp_file
->dbfd
;
9989 const char *kind
= is_debug_types
? "TU" : "CU";
9990 struct dwo_file
*dwo_file
;
9991 struct dwo_unit
*dwo_unit
;
9992 struct virtual_v1_dwo_sections sections
;
9993 void **dwo_file_slot
;
9994 char *virtual_dwo_name
;
9995 struct dwarf2_section_info
*cutu
;
9996 struct cleanup
*cleanups
;
9999 gdb_assert (dwp_file
->version
== 1);
10001 if (dwarf2_read_debug
)
10003 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10005 pulongest (unit_index
), hex_string (signature
),
10009 /* Fetch the sections of this DWO unit.
10010 Put a limit on the number of sections we look for so that bad data
10011 doesn't cause us to loop forever. */
10013 #define MAX_NR_V1_DWO_SECTIONS \
10014 (1 /* .debug_info or .debug_types */ \
10015 + 1 /* .debug_abbrev */ \
10016 + 1 /* .debug_line */ \
10017 + 1 /* .debug_loc */ \
10018 + 1 /* .debug_str_offsets */ \
10019 + 1 /* .debug_macro or .debug_macinfo */ \
10020 + 1 /* trailing zero */)
10022 memset (§ions
, 0, sizeof (sections
));
10023 cleanups
= make_cleanup (null_cleanup
, 0);
10025 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10028 uint32_t section_nr
=
10029 read_4_bytes (dbfd
,
10030 dwp_htab
->section_pool
.v1
.indices
10031 + (unit_index
+ i
) * sizeof (uint32_t));
10033 if (section_nr
== 0)
10035 if (section_nr
>= dwp_file
->num_sections
)
10037 error (_("Dwarf Error: bad DWP hash table, section number too large"
10038 " [in module %s]"),
10042 sectp
= dwp_file
->elf_sections
[section_nr
];
10043 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10045 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10046 " [in module %s]"),
10052 || dwarf2_section_empty_p (§ions
.info_or_types
)
10053 || dwarf2_section_empty_p (§ions
.abbrev
))
10055 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10056 " [in module %s]"),
10059 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10061 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10062 " [in module %s]"),
10066 /* It's easier for the rest of the code if we fake a struct dwo_file and
10067 have dwo_unit "live" in that. At least for now.
10069 The DWP file can be made up of a random collection of CUs and TUs.
10070 However, for each CU + set of TUs that came from the same original DWO
10071 file, we can combine them back into a virtual DWO file to save space
10072 (fewer struct dwo_file objects to allocate). Remember that for really
10073 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10076 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10077 get_section_id (§ions
.abbrev
),
10078 get_section_id (§ions
.line
),
10079 get_section_id (§ions
.loc
),
10080 get_section_id (§ions
.str_offsets
));
10081 make_cleanup (xfree
, virtual_dwo_name
);
10082 /* Can we use an existing virtual DWO file? */
10083 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10084 /* Create one if necessary. */
10085 if (*dwo_file_slot
== NULL
)
10087 if (dwarf2_read_debug
)
10089 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10092 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10093 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10095 strlen (virtual_dwo_name
));
10096 dwo_file
->comp_dir
= comp_dir
;
10097 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10098 dwo_file
->sections
.line
= sections
.line
;
10099 dwo_file
->sections
.loc
= sections
.loc
;
10100 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10101 dwo_file
->sections
.macro
= sections
.macro
;
10102 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10103 /* The "str" section is global to the entire DWP file. */
10104 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10105 /* The info or types section is assigned below to dwo_unit,
10106 there's no need to record it in dwo_file.
10107 Also, we can't simply record type sections in dwo_file because
10108 we record a pointer into the vector in dwo_unit. As we collect more
10109 types we'll grow the vector and eventually have to reallocate space
10110 for it, invalidating all copies of pointers into the previous
10112 *dwo_file_slot
= dwo_file
;
10116 if (dwarf2_read_debug
)
10118 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10121 dwo_file
= *dwo_file_slot
;
10123 do_cleanups (cleanups
);
10125 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10126 dwo_unit
->dwo_file
= dwo_file
;
10127 dwo_unit
->signature
= signature
;
10128 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10129 sizeof (struct dwarf2_section_info
));
10130 *dwo_unit
->section
= sections
.info_or_types
;
10131 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10136 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10137 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10138 piece within that section used by a TU/CU, return a virtual section
10139 of just that piece. */
10141 static struct dwarf2_section_info
10142 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10143 bfd_size_type offset
, bfd_size_type size
)
10145 struct dwarf2_section_info result
;
10148 gdb_assert (section
!= NULL
);
10149 gdb_assert (!section
->is_virtual
);
10151 memset (&result
, 0, sizeof (result
));
10152 result
.s
.containing_section
= section
;
10153 result
.is_virtual
= 1;
10158 sectp
= get_section_bfd_section (section
);
10160 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10161 bounds of the real section. This is a pretty-rare event, so just
10162 flag an error (easier) instead of a warning and trying to cope. */
10164 || offset
+ size
> bfd_get_section_size (sectp
))
10166 bfd
*abfd
= sectp
->owner
;
10168 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10169 " in section %s [in module %s]"),
10170 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10171 objfile_name (dwarf2_per_objfile
->objfile
));
10174 result
.virtual_offset
= offset
;
10175 result
.size
= size
;
10179 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10180 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10181 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10182 This is for DWP version 2 files. */
10184 static struct dwo_unit
*
10185 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10186 uint32_t unit_index
,
10187 const char *comp_dir
,
10188 ULONGEST signature
, int is_debug_types
)
10190 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10191 const struct dwp_hash_table
*dwp_htab
=
10192 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10193 bfd
*dbfd
= dwp_file
->dbfd
;
10194 const char *kind
= is_debug_types
? "TU" : "CU";
10195 struct dwo_file
*dwo_file
;
10196 struct dwo_unit
*dwo_unit
;
10197 struct virtual_v2_dwo_sections sections
;
10198 void **dwo_file_slot
;
10199 char *virtual_dwo_name
;
10200 struct dwarf2_section_info
*cutu
;
10201 struct cleanup
*cleanups
;
10204 gdb_assert (dwp_file
->version
== 2);
10206 if (dwarf2_read_debug
)
10208 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10210 pulongest (unit_index
), hex_string (signature
),
10214 /* Fetch the section offsets of this DWO unit. */
10216 memset (§ions
, 0, sizeof (sections
));
10217 cleanups
= make_cleanup (null_cleanup
, 0);
10219 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10221 uint32_t offset
= read_4_bytes (dbfd
,
10222 dwp_htab
->section_pool
.v2
.offsets
10223 + (((unit_index
- 1) * dwp_htab
->nr_columns
10225 * sizeof (uint32_t)));
10226 uint32_t size
= read_4_bytes (dbfd
,
10227 dwp_htab
->section_pool
.v2
.sizes
10228 + (((unit_index
- 1) * dwp_htab
->nr_columns
10230 * sizeof (uint32_t)));
10232 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10235 case DW_SECT_TYPES
:
10236 sections
.info_or_types_offset
= offset
;
10237 sections
.info_or_types_size
= size
;
10239 case DW_SECT_ABBREV
:
10240 sections
.abbrev_offset
= offset
;
10241 sections
.abbrev_size
= size
;
10244 sections
.line_offset
= offset
;
10245 sections
.line_size
= size
;
10248 sections
.loc_offset
= offset
;
10249 sections
.loc_size
= size
;
10251 case DW_SECT_STR_OFFSETS
:
10252 sections
.str_offsets_offset
= offset
;
10253 sections
.str_offsets_size
= size
;
10255 case DW_SECT_MACINFO
:
10256 sections
.macinfo_offset
= offset
;
10257 sections
.macinfo_size
= size
;
10259 case DW_SECT_MACRO
:
10260 sections
.macro_offset
= offset
;
10261 sections
.macro_size
= size
;
10266 /* It's easier for the rest of the code if we fake a struct dwo_file and
10267 have dwo_unit "live" in that. At least for now.
10269 The DWP file can be made up of a random collection of CUs and TUs.
10270 However, for each CU + set of TUs that came from the same original DWO
10271 file, we can combine them back into a virtual DWO file to save space
10272 (fewer struct dwo_file objects to allocate). Remember that for really
10273 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10276 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10277 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10278 (long) (sections
.line_size
? sections
.line_offset
: 0),
10279 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10280 (long) (sections
.str_offsets_size
10281 ? sections
.str_offsets_offset
: 0));
10282 make_cleanup (xfree
, virtual_dwo_name
);
10283 /* Can we use an existing virtual DWO file? */
10284 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10285 /* Create one if necessary. */
10286 if (*dwo_file_slot
== NULL
)
10288 if (dwarf2_read_debug
)
10290 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10293 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10294 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10296 strlen (virtual_dwo_name
));
10297 dwo_file
->comp_dir
= comp_dir
;
10298 dwo_file
->sections
.abbrev
=
10299 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10300 sections
.abbrev_offset
, sections
.abbrev_size
);
10301 dwo_file
->sections
.line
=
10302 create_dwp_v2_section (&dwp_file
->sections
.line
,
10303 sections
.line_offset
, sections
.line_size
);
10304 dwo_file
->sections
.loc
=
10305 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10306 sections
.loc_offset
, sections
.loc_size
);
10307 dwo_file
->sections
.macinfo
=
10308 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10309 sections
.macinfo_offset
, sections
.macinfo_size
);
10310 dwo_file
->sections
.macro
=
10311 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10312 sections
.macro_offset
, sections
.macro_size
);
10313 dwo_file
->sections
.str_offsets
=
10314 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10315 sections
.str_offsets_offset
,
10316 sections
.str_offsets_size
);
10317 /* The "str" section is global to the entire DWP file. */
10318 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10319 /* The info or types section is assigned below to dwo_unit,
10320 there's no need to record it in dwo_file.
10321 Also, we can't simply record type sections in dwo_file because
10322 we record a pointer into the vector in dwo_unit. As we collect more
10323 types we'll grow the vector and eventually have to reallocate space
10324 for it, invalidating all copies of pointers into the previous
10326 *dwo_file_slot
= dwo_file
;
10330 if (dwarf2_read_debug
)
10332 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10335 dwo_file
= *dwo_file_slot
;
10337 do_cleanups (cleanups
);
10339 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10340 dwo_unit
->dwo_file
= dwo_file
;
10341 dwo_unit
->signature
= signature
;
10342 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10343 sizeof (struct dwarf2_section_info
));
10344 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10345 ? &dwp_file
->sections
.types
10346 : &dwp_file
->sections
.info
,
10347 sections
.info_or_types_offset
,
10348 sections
.info_or_types_size
);
10349 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10354 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10355 Returns NULL if the signature isn't found. */
10357 static struct dwo_unit
*
10358 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10359 ULONGEST signature
, int is_debug_types
)
10361 const struct dwp_hash_table
*dwp_htab
=
10362 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10363 bfd
*dbfd
= dwp_file
->dbfd
;
10364 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10365 uint32_t hash
= signature
& mask
;
10366 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10369 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10371 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10372 find_dwo_cu
.signature
= signature
;
10373 slot
= htab_find_slot (is_debug_types
10374 ? dwp_file
->loaded_tus
10375 : dwp_file
->loaded_cus
,
10376 &find_dwo_cu
, INSERT
);
10381 /* Use a for loop so that we don't loop forever on bad debug info. */
10382 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10384 ULONGEST signature_in_table
;
10386 signature_in_table
=
10387 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10388 if (signature_in_table
== signature
)
10390 uint32_t unit_index
=
10391 read_4_bytes (dbfd
,
10392 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10394 if (dwp_file
->version
== 1)
10396 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10397 comp_dir
, signature
,
10402 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10403 comp_dir
, signature
,
10408 if (signature_in_table
== 0)
10410 hash
= (hash
+ hash2
) & mask
;
10413 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10414 " [in module %s]"),
10418 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10419 Open the file specified by FILE_NAME and hand it off to BFD for
10420 preliminary analysis. Return a newly initialized bfd *, which
10421 includes a canonicalized copy of FILE_NAME.
10422 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10423 SEARCH_CWD is true if the current directory is to be searched.
10424 It will be searched before debug-file-directory.
10425 If successful, the file is added to the bfd include table of the
10426 objfile's bfd (see gdb_bfd_record_inclusion).
10427 If unable to find/open the file, return NULL.
10428 NOTE: This function is derived from symfile_bfd_open. */
10431 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10435 char *absolute_name
;
10436 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10437 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10438 to debug_file_directory. */
10440 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10444 if (*debug_file_directory
!= '\0')
10445 search_path
= concat (".", dirname_separator_string
,
10446 debug_file_directory
, NULL
);
10448 search_path
= xstrdup (".");
10451 search_path
= xstrdup (debug_file_directory
);
10453 flags
= OPF_RETURN_REALPATH
;
10455 flags
|= OPF_SEARCH_IN_PATH
;
10456 desc
= openp (search_path
, flags
, file_name
,
10457 O_RDONLY
| O_BINARY
, &absolute_name
);
10458 xfree (search_path
);
10462 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10463 xfree (absolute_name
);
10464 if (sym_bfd
== NULL
)
10466 bfd_set_cacheable (sym_bfd
, 1);
10468 if (!bfd_check_format (sym_bfd
, bfd_object
))
10470 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10474 /* Success. Record the bfd as having been included by the objfile's bfd.
10475 This is important because things like demangled_names_hash lives in the
10476 objfile's per_bfd space and may have references to things like symbol
10477 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10478 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10483 /* Try to open DWO file FILE_NAME.
10484 COMP_DIR is the DW_AT_comp_dir attribute.
10485 The result is the bfd handle of the file.
10486 If there is a problem finding or opening the file, return NULL.
10487 Upon success, the canonicalized path of the file is stored in the bfd,
10488 same as symfile_bfd_open. */
10491 open_dwo_file (const char *file_name
, const char *comp_dir
)
10495 if (IS_ABSOLUTE_PATH (file_name
))
10496 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10498 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10500 if (comp_dir
!= NULL
)
10502 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10504 /* NOTE: If comp_dir is a relative path, this will also try the
10505 search path, which seems useful. */
10506 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10507 xfree (path_to_try
);
10512 /* That didn't work, try debug-file-directory, which, despite its name,
10513 is a list of paths. */
10515 if (*debug_file_directory
== '\0')
10518 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10521 /* This function is mapped across the sections and remembers the offset and
10522 size of each of the DWO debugging sections we are interested in. */
10525 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10527 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10528 const struct dwop_section_names
*names
= &dwop_section_names
;
10530 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10532 dwo_sections
->abbrev
.s
.asection
= sectp
;
10533 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10535 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10537 dwo_sections
->info
.s
.asection
= sectp
;
10538 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10540 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10542 dwo_sections
->line
.s
.asection
= sectp
;
10543 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10545 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10547 dwo_sections
->loc
.s
.asection
= sectp
;
10548 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10550 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10552 dwo_sections
->macinfo
.s
.asection
= sectp
;
10553 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10555 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10557 dwo_sections
->macro
.s
.asection
= sectp
;
10558 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10560 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10562 dwo_sections
->str
.s
.asection
= sectp
;
10563 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10565 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10567 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10568 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10570 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10572 struct dwarf2_section_info type_section
;
10574 memset (&type_section
, 0, sizeof (type_section
));
10575 type_section
.s
.asection
= sectp
;
10576 type_section
.size
= bfd_get_section_size (sectp
);
10577 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10582 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10583 by PER_CU. This is for the non-DWP case.
10584 The result is NULL if DWO_NAME can't be found. */
10586 static struct dwo_file
*
10587 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10588 const char *dwo_name
, const char *comp_dir
)
10590 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10591 struct dwo_file
*dwo_file
;
10593 struct cleanup
*cleanups
;
10595 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10598 if (dwarf2_read_debug
)
10599 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10602 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10603 dwo_file
->dwo_name
= dwo_name
;
10604 dwo_file
->comp_dir
= comp_dir
;
10605 dwo_file
->dbfd
= dbfd
;
10607 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10609 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10611 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10613 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10614 dwo_file
->sections
.types
);
10616 discard_cleanups (cleanups
);
10618 if (dwarf2_read_debug
)
10619 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10624 /* This function is mapped across the sections and remembers the offset and
10625 size of each of the DWP debugging sections common to version 1 and 2 that
10626 we are interested in. */
10629 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10630 void *dwp_file_ptr
)
10632 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10633 const struct dwop_section_names
*names
= &dwop_section_names
;
10634 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10636 /* Record the ELF section number for later lookup: this is what the
10637 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10638 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10639 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10641 /* Look for specific sections that we need. */
10642 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10644 dwp_file
->sections
.str
.s
.asection
= sectp
;
10645 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10647 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10649 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10650 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10652 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10654 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10655 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10659 /* This function is mapped across the sections and remembers the offset and
10660 size of each of the DWP version 2 debugging sections that we are interested
10661 in. This is split into a separate function because we don't know if we
10662 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10665 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10667 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10668 const struct dwop_section_names
*names
= &dwop_section_names
;
10669 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10671 /* Record the ELF section number for later lookup: this is what the
10672 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10673 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10674 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10676 /* Look for specific sections that we need. */
10677 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10679 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10680 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10682 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10684 dwp_file
->sections
.info
.s
.asection
= sectp
;
10685 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10687 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10689 dwp_file
->sections
.line
.s
.asection
= sectp
;
10690 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10692 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10694 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10695 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10697 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10699 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10700 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10702 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10704 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10705 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10707 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10709 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10710 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10712 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10714 dwp_file
->sections
.types
.s
.asection
= sectp
;
10715 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10719 /* Hash function for dwp_file loaded CUs/TUs. */
10722 hash_dwp_loaded_cutus (const void *item
)
10724 const struct dwo_unit
*dwo_unit
= item
;
10726 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10727 return dwo_unit
->signature
;
10730 /* Equality function for dwp_file loaded CUs/TUs. */
10733 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10735 const struct dwo_unit
*dua
= a
;
10736 const struct dwo_unit
*dub
= b
;
10738 return dua
->signature
== dub
->signature
;
10741 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10744 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10746 return htab_create_alloc_ex (3,
10747 hash_dwp_loaded_cutus
,
10748 eq_dwp_loaded_cutus
,
10750 &objfile
->objfile_obstack
,
10751 hashtab_obstack_allocate
,
10752 dummy_obstack_deallocate
);
10755 /* Try to open DWP file FILE_NAME.
10756 The result is the bfd handle of the file.
10757 If there is a problem finding or opening the file, return NULL.
10758 Upon success, the canonicalized path of the file is stored in the bfd,
10759 same as symfile_bfd_open. */
10762 open_dwp_file (const char *file_name
)
10766 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10770 /* Work around upstream bug 15652.
10771 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10772 [Whether that's a "bug" is debatable, but it is getting in our way.]
10773 We have no real idea where the dwp file is, because gdb's realpath-ing
10774 of the executable's path may have discarded the needed info.
10775 [IWBN if the dwp file name was recorded in the executable, akin to
10776 .gnu_debuglink, but that doesn't exist yet.]
10777 Strip the directory from FILE_NAME and search again. */
10778 if (*debug_file_directory
!= '\0')
10780 /* Don't implicitly search the current directory here.
10781 If the user wants to search "." to handle this case,
10782 it must be added to debug-file-directory. */
10783 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10790 /* Initialize the use of the DWP file for the current objfile.
10791 By convention the name of the DWP file is ${objfile}.dwp.
10792 The result is NULL if it can't be found. */
10794 static struct dwp_file
*
10795 open_and_init_dwp_file (void)
10797 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10798 struct dwp_file
*dwp_file
;
10801 struct cleanup
*cleanups
;
10803 /* Try to find first .dwp for the binary file before any symbolic links
10805 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10806 cleanups
= make_cleanup (xfree
, dwp_name
);
10808 dbfd
= open_dwp_file (dwp_name
);
10810 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10812 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10813 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10814 make_cleanup (xfree
, dwp_name
);
10815 dbfd
= open_dwp_file (dwp_name
);
10820 if (dwarf2_read_debug
)
10821 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10822 do_cleanups (cleanups
);
10825 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10826 dwp_file
->name
= bfd_get_filename (dbfd
);
10827 dwp_file
->dbfd
= dbfd
;
10828 do_cleanups (cleanups
);
10830 /* +1: section 0 is unused */
10831 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10832 dwp_file
->elf_sections
=
10833 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10834 dwp_file
->num_sections
, asection
*);
10836 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10838 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10840 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10842 /* The DWP file version is stored in the hash table. Oh well. */
10843 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10845 /* Technically speaking, we should try to limp along, but this is
10846 pretty bizarre. We use pulongest here because that's the established
10847 portability solution (e.g, we cannot use %u for uint32_t). */
10848 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10849 " TU version %s [in DWP file %s]"),
10850 pulongest (dwp_file
->cus
->version
),
10851 pulongest (dwp_file
->tus
->version
), dwp_name
);
10853 dwp_file
->version
= dwp_file
->cus
->version
;
10855 if (dwp_file
->version
== 2)
10856 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10858 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10859 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10861 if (dwarf2_read_debug
)
10863 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10864 fprintf_unfiltered (gdb_stdlog
,
10865 " %s CUs, %s TUs\n",
10866 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10867 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10873 /* Wrapper around open_and_init_dwp_file, only open it once. */
10875 static struct dwp_file
*
10876 get_dwp_file (void)
10878 if (! dwarf2_per_objfile
->dwp_checked
)
10880 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10881 dwarf2_per_objfile
->dwp_checked
= 1;
10883 return dwarf2_per_objfile
->dwp_file
;
10886 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10887 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10888 or in the DWP file for the objfile, referenced by THIS_UNIT.
10889 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10890 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10892 This is called, for example, when wanting to read a variable with a
10893 complex location. Therefore we don't want to do file i/o for every call.
10894 Therefore we don't want to look for a DWO file on every call.
10895 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10896 then we check if we've already seen DWO_NAME, and only THEN do we check
10899 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10900 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10902 static struct dwo_unit
*
10903 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10904 const char *dwo_name
, const char *comp_dir
,
10905 ULONGEST signature
, int is_debug_types
)
10907 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10908 const char *kind
= is_debug_types
? "TU" : "CU";
10909 void **dwo_file_slot
;
10910 struct dwo_file
*dwo_file
;
10911 struct dwp_file
*dwp_file
;
10913 /* First see if there's a DWP file.
10914 If we have a DWP file but didn't find the DWO inside it, don't
10915 look for the original DWO file. It makes gdb behave differently
10916 depending on whether one is debugging in the build tree. */
10918 dwp_file
= get_dwp_file ();
10919 if (dwp_file
!= NULL
)
10921 const struct dwp_hash_table
*dwp_htab
=
10922 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10924 if (dwp_htab
!= NULL
)
10926 struct dwo_unit
*dwo_cutu
=
10927 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10928 signature
, is_debug_types
);
10930 if (dwo_cutu
!= NULL
)
10932 if (dwarf2_read_debug
)
10934 fprintf_unfiltered (gdb_stdlog
,
10935 "Virtual DWO %s %s found: @%s\n",
10936 kind
, hex_string (signature
),
10937 host_address_to_string (dwo_cutu
));
10945 /* No DWP file, look for the DWO file. */
10947 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10948 if (*dwo_file_slot
== NULL
)
10950 /* Read in the file and build a table of the CUs/TUs it contains. */
10951 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10953 /* NOTE: This will be NULL if unable to open the file. */
10954 dwo_file
= *dwo_file_slot
;
10956 if (dwo_file
!= NULL
)
10958 struct dwo_unit
*dwo_cutu
= NULL
;
10960 if (is_debug_types
&& dwo_file
->tus
)
10962 struct dwo_unit find_dwo_cutu
;
10964 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10965 find_dwo_cutu
.signature
= signature
;
10966 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10968 else if (!is_debug_types
&& dwo_file
->cu
)
10970 if (signature
== dwo_file
->cu
->signature
)
10971 dwo_cutu
= dwo_file
->cu
;
10974 if (dwo_cutu
!= NULL
)
10976 if (dwarf2_read_debug
)
10978 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10979 kind
, dwo_name
, hex_string (signature
),
10980 host_address_to_string (dwo_cutu
));
10987 /* We didn't find it. This could mean a dwo_id mismatch, or
10988 someone deleted the DWO/DWP file, or the search path isn't set up
10989 correctly to find the file. */
10991 if (dwarf2_read_debug
)
10993 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
10994 kind
, dwo_name
, hex_string (signature
));
10997 /* This is a warning and not a complaint because it can be caused by
10998 pilot error (e.g., user accidentally deleting the DWO). */
11000 /* Print the name of the DWP file if we looked there, helps the user
11001 better diagnose the problem. */
11002 char *dwp_text
= NULL
;
11003 struct cleanup
*cleanups
;
11005 if (dwp_file
!= NULL
)
11006 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11007 cleanups
= make_cleanup (xfree
, dwp_text
);
11009 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11010 " [in module %s]"),
11011 kind
, dwo_name
, hex_string (signature
),
11012 dwp_text
!= NULL
? dwp_text
: "",
11013 this_unit
->is_debug_types
? "TU" : "CU",
11014 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11016 do_cleanups (cleanups
);
11021 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11022 See lookup_dwo_cutu_unit for details. */
11024 static struct dwo_unit
*
11025 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11026 const char *dwo_name
, const char *comp_dir
,
11027 ULONGEST signature
)
11029 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11032 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11033 See lookup_dwo_cutu_unit for details. */
11035 static struct dwo_unit
*
11036 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11037 const char *dwo_name
, const char *comp_dir
)
11039 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11042 /* Traversal function for queue_and_load_all_dwo_tus. */
11045 queue_and_load_dwo_tu (void **slot
, void *info
)
11047 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11048 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11049 ULONGEST signature
= dwo_unit
->signature
;
11050 struct signatured_type
*sig_type
=
11051 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11053 if (sig_type
!= NULL
)
11055 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11057 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11058 a real dependency of PER_CU on SIG_TYPE. That is detected later
11059 while processing PER_CU. */
11060 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11061 load_full_type_unit (sig_cu
);
11062 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11068 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11069 The DWO may have the only definition of the type, though it may not be
11070 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11071 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11074 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11076 struct dwo_unit
*dwo_unit
;
11077 struct dwo_file
*dwo_file
;
11079 gdb_assert (!per_cu
->is_debug_types
);
11080 gdb_assert (get_dwp_file () == NULL
);
11081 gdb_assert (per_cu
->cu
!= NULL
);
11083 dwo_unit
= per_cu
->cu
->dwo_unit
;
11084 gdb_assert (dwo_unit
!= NULL
);
11086 dwo_file
= dwo_unit
->dwo_file
;
11087 if (dwo_file
->tus
!= NULL
)
11088 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11091 /* Free all resources associated with DWO_FILE.
11092 Close the DWO file and munmap the sections.
11093 All memory should be on the objfile obstack. */
11096 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11099 struct dwarf2_section_info
*section
;
11101 /* Note: dbfd is NULL for virtual DWO files. */
11102 gdb_bfd_unref (dwo_file
->dbfd
);
11104 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11107 /* Wrapper for free_dwo_file for use in cleanups. */
11110 free_dwo_file_cleanup (void *arg
)
11112 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11113 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11115 free_dwo_file (dwo_file
, objfile
);
11118 /* Traversal function for free_dwo_files. */
11121 free_dwo_file_from_slot (void **slot
, void *info
)
11123 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11124 struct objfile
*objfile
= (struct objfile
*) info
;
11126 free_dwo_file (dwo_file
, objfile
);
11131 /* Free all resources associated with DWO_FILES. */
11134 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11136 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11139 /* Read in various DIEs. */
11141 /* qsort helper for inherit_abstract_dies. */
11144 unsigned_int_compar (const void *ap
, const void *bp
)
11146 unsigned int a
= *(unsigned int *) ap
;
11147 unsigned int b
= *(unsigned int *) bp
;
11149 return (a
> b
) - (b
> a
);
11152 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11153 Inherit only the children of the DW_AT_abstract_origin DIE not being
11154 already referenced by DW_AT_abstract_origin from the children of the
11158 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11160 struct die_info
*child_die
;
11161 unsigned die_children_count
;
11162 /* CU offsets which were referenced by children of the current DIE. */
11163 sect_offset
*offsets
;
11164 sect_offset
*offsets_end
, *offsetp
;
11165 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11166 struct die_info
*origin_die
;
11167 /* Iterator of the ORIGIN_DIE children. */
11168 struct die_info
*origin_child_die
;
11169 struct cleanup
*cleanups
;
11170 struct attribute
*attr
;
11171 struct dwarf2_cu
*origin_cu
;
11172 struct pending
**origin_previous_list_in_scope
;
11174 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11178 /* Note that following die references may follow to a die in a
11182 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11184 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11186 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11187 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11189 if (die
->tag
!= origin_die
->tag
11190 && !(die
->tag
== DW_TAG_inlined_subroutine
11191 && origin_die
->tag
== DW_TAG_subprogram
))
11192 complaint (&symfile_complaints
,
11193 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11194 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11196 child_die
= die
->child
;
11197 die_children_count
= 0;
11198 while (child_die
&& child_die
->tag
)
11200 child_die
= sibling_die (child_die
);
11201 die_children_count
++;
11203 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11204 cleanups
= make_cleanup (xfree
, offsets
);
11206 offsets_end
= offsets
;
11207 child_die
= die
->child
;
11208 while (child_die
&& child_die
->tag
)
11210 /* For each CHILD_DIE, find the corresponding child of
11211 ORIGIN_DIE. If there is more than one layer of
11212 DW_AT_abstract_origin, follow them all; there shouldn't be,
11213 but GCC versions at least through 4.4 generate this (GCC PR
11215 struct die_info
*child_origin_die
= child_die
;
11216 struct dwarf2_cu
*child_origin_cu
= cu
;
11220 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11224 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11228 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11229 counterpart may exist. */
11230 if (child_origin_die
!= child_die
)
11232 if (child_die
->tag
!= child_origin_die
->tag
11233 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11234 && child_origin_die
->tag
== DW_TAG_subprogram
))
11235 complaint (&symfile_complaints
,
11236 _("Child DIE 0x%x and its abstract origin 0x%x have "
11237 "different tags"), child_die
->offset
.sect_off
,
11238 child_origin_die
->offset
.sect_off
);
11239 if (child_origin_die
->parent
!= origin_die
)
11240 complaint (&symfile_complaints
,
11241 _("Child DIE 0x%x and its abstract origin 0x%x have "
11242 "different parents"), child_die
->offset
.sect_off
,
11243 child_origin_die
->offset
.sect_off
);
11245 *offsets_end
++ = child_origin_die
->offset
;
11247 child_die
= sibling_die (child_die
);
11249 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11250 unsigned_int_compar
);
11251 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11252 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11253 complaint (&symfile_complaints
,
11254 _("Multiple children of DIE 0x%x refer "
11255 "to DIE 0x%x as their abstract origin"),
11256 die
->offset
.sect_off
, offsetp
->sect_off
);
11259 origin_child_die
= origin_die
->child
;
11260 while (origin_child_die
&& origin_child_die
->tag
)
11262 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11263 while (offsetp
< offsets_end
11264 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11266 if (offsetp
>= offsets_end
11267 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11269 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11270 Check whether we're already processing ORIGIN_CHILD_DIE.
11271 This can happen with mutually referenced abstract_origins.
11273 if (!origin_child_die
->in_process
)
11274 process_die (origin_child_die
, origin_cu
);
11276 origin_child_die
= sibling_die (origin_child_die
);
11278 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11280 do_cleanups (cleanups
);
11284 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11286 struct objfile
*objfile
= cu
->objfile
;
11287 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11288 struct context_stack
*newobj
;
11291 struct die_info
*child_die
;
11292 struct attribute
*attr
, *call_line
, *call_file
;
11294 CORE_ADDR baseaddr
;
11295 struct block
*block
;
11296 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11297 VEC (symbolp
) *template_args
= NULL
;
11298 struct template_symbol
*templ_func
= NULL
;
11302 /* If we do not have call site information, we can't show the
11303 caller of this inlined function. That's too confusing, so
11304 only use the scope for local variables. */
11305 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11306 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11307 if (call_line
== NULL
|| call_file
== NULL
)
11309 read_lexical_block_scope (die
, cu
);
11314 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11316 name
= dwarf2_name (die
, cu
);
11318 /* Ignore functions with missing or empty names. These are actually
11319 illegal according to the DWARF standard. */
11322 complaint (&symfile_complaints
,
11323 _("missing name for subprogram DIE at %d"),
11324 die
->offset
.sect_off
);
11328 /* Ignore functions with missing or invalid low and high pc attributes. */
11329 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11331 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11332 if (!attr
|| !DW_UNSND (attr
))
11333 complaint (&symfile_complaints
,
11334 _("cannot get low and high bounds "
11335 "for subprogram DIE at %d"),
11336 die
->offset
.sect_off
);
11340 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11341 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11343 /* If we have any template arguments, then we must allocate a
11344 different sort of symbol. */
11345 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11347 if (child_die
->tag
== DW_TAG_template_type_param
11348 || child_die
->tag
== DW_TAG_template_value_param
)
11350 templ_func
= allocate_template_symbol (objfile
);
11351 templ_func
->base
.is_cplus_template_function
= 1;
11356 newobj
= push_context (0, lowpc
);
11357 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11358 (struct symbol
*) templ_func
);
11360 /* If there is a location expression for DW_AT_frame_base, record
11362 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11364 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11366 cu
->list_in_scope
= &local_symbols
;
11368 if (die
->child
!= NULL
)
11370 child_die
= die
->child
;
11371 while (child_die
&& child_die
->tag
)
11373 if (child_die
->tag
== DW_TAG_template_type_param
11374 || child_die
->tag
== DW_TAG_template_value_param
)
11376 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11379 VEC_safe_push (symbolp
, template_args
, arg
);
11382 process_die (child_die
, cu
);
11383 child_die
= sibling_die (child_die
);
11387 inherit_abstract_dies (die
, cu
);
11389 /* If we have a DW_AT_specification, we might need to import using
11390 directives from the context of the specification DIE. See the
11391 comment in determine_prefix. */
11392 if (cu
->language
== language_cplus
11393 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11395 struct dwarf2_cu
*spec_cu
= cu
;
11396 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11400 child_die
= spec_die
->child
;
11401 while (child_die
&& child_die
->tag
)
11403 if (child_die
->tag
== DW_TAG_imported_module
)
11404 process_die (child_die
, spec_cu
);
11405 child_die
= sibling_die (child_die
);
11408 /* In some cases, GCC generates specification DIEs that
11409 themselves contain DW_AT_specification attributes. */
11410 spec_die
= die_specification (spec_die
, &spec_cu
);
11414 newobj
= pop_context ();
11415 /* Make a block for the local symbols within. */
11416 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11419 /* For C++, set the block's scope. */
11420 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11421 && cu
->processing_has_namespace_info
)
11422 block_set_scope (block
, determine_prefix (die
, cu
),
11423 &objfile
->objfile_obstack
);
11425 /* If we have address ranges, record them. */
11426 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11428 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11430 /* Attach template arguments to function. */
11431 if (! VEC_empty (symbolp
, template_args
))
11433 gdb_assert (templ_func
!= NULL
);
11435 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11436 templ_func
->template_arguments
11437 = obstack_alloc (&objfile
->objfile_obstack
,
11438 (templ_func
->n_template_arguments
11439 * sizeof (struct symbol
*)));
11440 memcpy (templ_func
->template_arguments
,
11441 VEC_address (symbolp
, template_args
),
11442 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11443 VEC_free (symbolp
, template_args
);
11446 /* In C++, we can have functions nested inside functions (e.g., when
11447 a function declares a class that has methods). This means that
11448 when we finish processing a function scope, we may need to go
11449 back to building a containing block's symbol lists. */
11450 local_symbols
= newobj
->locals
;
11451 using_directives
= newobj
->using_directives
;
11453 /* If we've finished processing a top-level function, subsequent
11454 symbols go in the file symbol list. */
11455 if (outermost_context_p ())
11456 cu
->list_in_scope
= &file_symbols
;
11459 /* Process all the DIES contained within a lexical block scope. Start
11460 a new scope, process the dies, and then close the scope. */
11463 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11465 struct objfile
*objfile
= cu
->objfile
;
11466 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11467 struct context_stack
*newobj
;
11468 CORE_ADDR lowpc
, highpc
;
11469 struct die_info
*child_die
;
11470 CORE_ADDR baseaddr
;
11472 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11474 /* Ignore blocks with missing or invalid low and high pc attributes. */
11475 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11476 as multiple lexical blocks? Handling children in a sane way would
11477 be nasty. Might be easier to properly extend generic blocks to
11478 describe ranges. */
11479 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11481 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11482 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11484 push_context (0, lowpc
);
11485 if (die
->child
!= NULL
)
11487 child_die
= die
->child
;
11488 while (child_die
&& child_die
->tag
)
11490 process_die (child_die
, cu
);
11491 child_die
= sibling_die (child_die
);
11494 newobj
= pop_context ();
11496 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11498 struct block
*block
11499 = finish_block (0, &local_symbols
, newobj
->old_blocks
,
11500 newobj
->start_addr
, highpc
);
11502 /* Note that recording ranges after traversing children, as we
11503 do here, means that recording a parent's ranges entails
11504 walking across all its children's ranges as they appear in
11505 the address map, which is quadratic behavior.
11507 It would be nicer to record the parent's ranges before
11508 traversing its children, simply overriding whatever you find
11509 there. But since we don't even decide whether to create a
11510 block until after we've traversed its children, that's hard
11512 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11514 local_symbols
= newobj
->locals
;
11515 using_directives
= newobj
->using_directives
;
11518 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11521 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11523 struct objfile
*objfile
= cu
->objfile
;
11524 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11525 CORE_ADDR pc
, baseaddr
;
11526 struct attribute
*attr
;
11527 struct call_site
*call_site
, call_site_local
;
11530 struct die_info
*child_die
;
11532 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11534 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11537 complaint (&symfile_complaints
,
11538 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11539 "DIE 0x%x [in module %s]"),
11540 die
->offset
.sect_off
, objfile_name (objfile
));
11543 pc
= attr_value_as_address (attr
) + baseaddr
;
11544 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11546 if (cu
->call_site_htab
== NULL
)
11547 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11548 NULL
, &objfile
->objfile_obstack
,
11549 hashtab_obstack_allocate
, NULL
);
11550 call_site_local
.pc
= pc
;
11551 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11554 complaint (&symfile_complaints
,
11555 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11556 "DIE 0x%x [in module %s]"),
11557 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11558 objfile_name (objfile
));
11562 /* Count parameters at the caller. */
11565 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11566 child_die
= sibling_die (child_die
))
11568 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11570 complaint (&symfile_complaints
,
11571 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11572 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11573 child_die
->tag
, child_die
->offset
.sect_off
,
11574 objfile_name (objfile
));
11581 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11582 (sizeof (*call_site
)
11583 + (sizeof (*call_site
->parameter
)
11584 * (nparams
- 1))));
11586 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11587 call_site
->pc
= pc
;
11589 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11591 struct die_info
*func_die
;
11593 /* Skip also over DW_TAG_inlined_subroutine. */
11594 for (func_die
= die
->parent
;
11595 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11596 && func_die
->tag
!= DW_TAG_subroutine_type
;
11597 func_die
= func_die
->parent
);
11599 /* DW_AT_GNU_all_call_sites is a superset
11600 of DW_AT_GNU_all_tail_call_sites. */
11602 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11603 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11605 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11606 not complete. But keep CALL_SITE for look ups via call_site_htab,
11607 both the initial caller containing the real return address PC and
11608 the final callee containing the current PC of a chain of tail
11609 calls do not need to have the tail call list complete. But any
11610 function candidate for a virtual tail call frame searched via
11611 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11612 determined unambiguously. */
11616 struct type
*func_type
= NULL
;
11619 func_type
= get_die_type (func_die
, cu
);
11620 if (func_type
!= NULL
)
11622 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11624 /* Enlist this call site to the function. */
11625 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11626 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11629 complaint (&symfile_complaints
,
11630 _("Cannot find function owning DW_TAG_GNU_call_site "
11631 "DIE 0x%x [in module %s]"),
11632 die
->offset
.sect_off
, objfile_name (objfile
));
11636 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11638 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11639 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11640 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11641 /* Keep NULL DWARF_BLOCK. */;
11642 else if (attr_form_is_block (attr
))
11644 struct dwarf2_locexpr_baton
*dlbaton
;
11646 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11647 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11648 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11649 dlbaton
->per_cu
= cu
->per_cu
;
11651 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11653 else if (attr_form_is_ref (attr
))
11655 struct dwarf2_cu
*target_cu
= cu
;
11656 struct die_info
*target_die
;
11658 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11659 gdb_assert (target_cu
->objfile
== objfile
);
11660 if (die_is_declaration (target_die
, target_cu
))
11662 const char *target_physname
= NULL
;
11663 struct attribute
*target_attr
;
11665 /* Prefer the mangled name; otherwise compute the demangled one. */
11666 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11667 if (target_attr
== NULL
)
11668 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11670 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11671 target_physname
= DW_STRING (target_attr
);
11673 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11674 if (target_physname
== NULL
)
11675 complaint (&symfile_complaints
,
11676 _("DW_AT_GNU_call_site_target target DIE has invalid "
11677 "physname, for referencing DIE 0x%x [in module %s]"),
11678 die
->offset
.sect_off
, objfile_name (objfile
));
11680 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11686 /* DW_AT_entry_pc should be preferred. */
11687 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11688 complaint (&symfile_complaints
,
11689 _("DW_AT_GNU_call_site_target target DIE has invalid "
11690 "low pc, for referencing DIE 0x%x [in module %s]"),
11691 die
->offset
.sect_off
, objfile_name (objfile
));
11694 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11695 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11700 complaint (&symfile_complaints
,
11701 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11702 "block nor reference, for DIE 0x%x [in module %s]"),
11703 die
->offset
.sect_off
, objfile_name (objfile
));
11705 call_site
->per_cu
= cu
->per_cu
;
11707 for (child_die
= die
->child
;
11708 child_die
&& child_die
->tag
;
11709 child_die
= sibling_die (child_die
))
11711 struct call_site_parameter
*parameter
;
11712 struct attribute
*loc
, *origin
;
11714 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11716 /* Already printed the complaint above. */
11720 gdb_assert (call_site
->parameter_count
< nparams
);
11721 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11723 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11724 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11725 register is contained in DW_AT_GNU_call_site_value. */
11727 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11728 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11729 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11731 sect_offset offset
;
11733 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11734 offset
= dwarf2_get_ref_die_offset (origin
);
11735 if (!offset_in_cu_p (&cu
->header
, offset
))
11737 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11738 binding can be done only inside one CU. Such referenced DIE
11739 therefore cannot be even moved to DW_TAG_partial_unit. */
11740 complaint (&symfile_complaints
,
11741 _("DW_AT_abstract_origin offset is not in CU for "
11742 "DW_TAG_GNU_call_site child DIE 0x%x "
11744 child_die
->offset
.sect_off
, objfile_name (objfile
));
11747 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11748 - cu
->header
.offset
.sect_off
);
11750 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11752 complaint (&symfile_complaints
,
11753 _("No DW_FORM_block* DW_AT_location for "
11754 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11755 child_die
->offset
.sect_off
, objfile_name (objfile
));
11760 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11761 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11762 if (parameter
->u
.dwarf_reg
!= -1)
11763 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11764 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11765 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11766 ¶meter
->u
.fb_offset
))
11767 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11770 complaint (&symfile_complaints
,
11771 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11772 "for DW_FORM_block* DW_AT_location is supported for "
11773 "DW_TAG_GNU_call_site child DIE 0x%x "
11775 child_die
->offset
.sect_off
, objfile_name (objfile
));
11780 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11781 if (!attr_form_is_block (attr
))
11783 complaint (&symfile_complaints
,
11784 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11785 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11786 child_die
->offset
.sect_off
, objfile_name (objfile
));
11789 parameter
->value
= DW_BLOCK (attr
)->data
;
11790 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11792 /* Parameters are not pre-cleared by memset above. */
11793 parameter
->data_value
= NULL
;
11794 parameter
->data_value_size
= 0;
11795 call_site
->parameter_count
++;
11797 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11800 if (!attr_form_is_block (attr
))
11801 complaint (&symfile_complaints
,
11802 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11803 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11804 child_die
->offset
.sect_off
, objfile_name (objfile
));
11807 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11808 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11814 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11815 Return 1 if the attributes are present and valid, otherwise, return 0.
11816 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11819 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11820 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11821 struct partial_symtab
*ranges_pst
)
11823 struct objfile
*objfile
= cu
->objfile
;
11824 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11825 struct comp_unit_head
*cu_header
= &cu
->header
;
11826 bfd
*obfd
= objfile
->obfd
;
11827 unsigned int addr_size
= cu_header
->addr_size
;
11828 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11829 /* Base address selection entry. */
11832 unsigned int dummy
;
11833 const gdb_byte
*buffer
;
11837 CORE_ADDR high
= 0;
11838 CORE_ADDR baseaddr
;
11840 found_base
= cu
->base_known
;
11841 base
= cu
->base_address
;
11843 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11844 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11846 complaint (&symfile_complaints
,
11847 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11851 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11853 /* Read in the largest possible address. */
11854 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11855 if ((marker
& mask
) == mask
)
11857 /* If we found the largest possible address, then
11858 read the base address. */
11859 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11860 buffer
+= 2 * addr_size
;
11861 offset
+= 2 * addr_size
;
11867 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11871 CORE_ADDR range_beginning
, range_end
;
11873 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11874 buffer
+= addr_size
;
11875 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11876 buffer
+= addr_size
;
11877 offset
+= 2 * addr_size
;
11879 /* An end of list marker is a pair of zero addresses. */
11880 if (range_beginning
== 0 && range_end
== 0)
11881 /* Found the end of list entry. */
11884 /* Each base address selection entry is a pair of 2 values.
11885 The first is the largest possible address, the second is
11886 the base address. Check for a base address here. */
11887 if ((range_beginning
& mask
) == mask
)
11889 /* If we found the largest possible address, then
11890 read the base address. */
11891 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11898 /* We have no valid base address for the ranges
11900 complaint (&symfile_complaints
,
11901 _("Invalid .debug_ranges data (no base address)"));
11905 if (range_beginning
> range_end
)
11907 /* Inverted range entries are invalid. */
11908 complaint (&symfile_complaints
,
11909 _("Invalid .debug_ranges data (inverted range)"));
11913 /* Empty range entries have no effect. */
11914 if (range_beginning
== range_end
)
11917 range_beginning
+= base
;
11920 /* A not-uncommon case of bad debug info.
11921 Don't pollute the addrmap with bad data. */
11922 if (range_beginning
+ baseaddr
== 0
11923 && !dwarf2_per_objfile
->has_section_at_zero
)
11925 complaint (&symfile_complaints
,
11926 _(".debug_ranges entry has start address of zero"
11927 " [in module %s]"), objfile_name (objfile
));
11931 if (ranges_pst
!= NULL
)
11936 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11937 range_beginning
+ baseaddr
);
11938 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11939 range_end
+ baseaddr
);
11940 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11944 /* FIXME: This is recording everything as a low-high
11945 segment of consecutive addresses. We should have a
11946 data structure for discontiguous block ranges
11950 low
= range_beginning
;
11956 if (range_beginning
< low
)
11957 low
= range_beginning
;
11958 if (range_end
> high
)
11964 /* If the first entry is an end-of-list marker, the range
11965 describes an empty scope, i.e. no instructions. */
11971 *high_return
= high
;
11975 /* Get low and high pc attributes from a die. Return 1 if the attributes
11976 are present and valid, otherwise, return 0. Return -1 if the range is
11977 discontinuous, i.e. derived from DW_AT_ranges information. */
11980 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
11981 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
11982 struct partial_symtab
*pst
)
11984 struct attribute
*attr
;
11985 struct attribute
*attr_high
;
11987 CORE_ADDR high
= 0;
11990 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11993 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11996 low
= attr_value_as_address (attr
);
11997 high
= attr_value_as_address (attr_high
);
11998 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12002 /* Found high w/o low attribute. */
12005 /* Found consecutive range of addresses. */
12010 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12013 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12014 We take advantage of the fact that DW_AT_ranges does not appear
12015 in DW_TAG_compile_unit of DWO files. */
12016 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12017 unsigned int ranges_offset
= (DW_UNSND (attr
)
12018 + (need_ranges_base
12022 /* Value of the DW_AT_ranges attribute is the offset in the
12023 .debug_ranges section. */
12024 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12026 /* Found discontinuous range of addresses. */
12031 /* read_partial_die has also the strict LOW < HIGH requirement. */
12035 /* When using the GNU linker, .gnu.linkonce. sections are used to
12036 eliminate duplicate copies of functions and vtables and such.
12037 The linker will arbitrarily choose one and discard the others.
12038 The AT_*_pc values for such functions refer to local labels in
12039 these sections. If the section from that file was discarded, the
12040 labels are not in the output, so the relocs get a value of 0.
12041 If this is a discarded function, mark the pc bounds as invalid,
12042 so that GDB will ignore it. */
12043 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12052 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12053 its low and high PC addresses. Do nothing if these addresses could not
12054 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12055 and HIGHPC to the high address if greater than HIGHPC. */
12058 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12059 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12060 struct dwarf2_cu
*cu
)
12062 CORE_ADDR low
, high
;
12063 struct die_info
*child
= die
->child
;
12065 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12067 *lowpc
= min (*lowpc
, low
);
12068 *highpc
= max (*highpc
, high
);
12071 /* If the language does not allow nested subprograms (either inside
12072 subprograms or lexical blocks), we're done. */
12073 if (cu
->language
!= language_ada
)
12076 /* Check all the children of the given DIE. If it contains nested
12077 subprograms, then check their pc bounds. Likewise, we need to
12078 check lexical blocks as well, as they may also contain subprogram
12080 while (child
&& child
->tag
)
12082 if (child
->tag
== DW_TAG_subprogram
12083 || child
->tag
== DW_TAG_lexical_block
)
12084 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12085 child
= sibling_die (child
);
12089 /* Get the low and high pc's represented by the scope DIE, and store
12090 them in *LOWPC and *HIGHPC. If the correct values can't be
12091 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12094 get_scope_pc_bounds (struct die_info
*die
,
12095 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12096 struct dwarf2_cu
*cu
)
12098 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12099 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12100 CORE_ADDR current_low
, current_high
;
12102 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12104 best_low
= current_low
;
12105 best_high
= current_high
;
12109 struct die_info
*child
= die
->child
;
12111 while (child
&& child
->tag
)
12113 switch (child
->tag
) {
12114 case DW_TAG_subprogram
:
12115 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12117 case DW_TAG_namespace
:
12118 case DW_TAG_module
:
12119 /* FIXME: carlton/2004-01-16: Should we do this for
12120 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12121 that current GCC's always emit the DIEs corresponding
12122 to definitions of methods of classes as children of a
12123 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12124 the DIEs giving the declarations, which could be
12125 anywhere). But I don't see any reason why the
12126 standards says that they have to be there. */
12127 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12129 if (current_low
!= ((CORE_ADDR
) -1))
12131 best_low
= min (best_low
, current_low
);
12132 best_high
= max (best_high
, current_high
);
12140 child
= sibling_die (child
);
12145 *highpc
= best_high
;
12148 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12152 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12153 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12155 struct objfile
*objfile
= cu
->objfile
;
12156 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12157 struct attribute
*attr
;
12158 struct attribute
*attr_high
;
12160 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12163 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12166 CORE_ADDR low
= attr_value_as_address (attr
);
12167 CORE_ADDR high
= attr_value_as_address (attr_high
);
12169 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12172 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12173 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12174 record_block_range (block
, low
, high
- 1);
12178 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12181 bfd
*obfd
= objfile
->obfd
;
12182 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12183 We take advantage of the fact that DW_AT_ranges does not appear
12184 in DW_TAG_compile_unit of DWO files. */
12185 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12187 /* The value of the DW_AT_ranges attribute is the offset of the
12188 address range list in the .debug_ranges section. */
12189 unsigned long offset
= (DW_UNSND (attr
)
12190 + (need_ranges_base
? cu
->ranges_base
: 0));
12191 const gdb_byte
*buffer
;
12193 /* For some target architectures, but not others, the
12194 read_address function sign-extends the addresses it returns.
12195 To recognize base address selection entries, we need a
12197 unsigned int addr_size
= cu
->header
.addr_size
;
12198 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12200 /* The base address, to which the next pair is relative. Note
12201 that this 'base' is a DWARF concept: most entries in a range
12202 list are relative, to reduce the number of relocs against the
12203 debugging information. This is separate from this function's
12204 'baseaddr' argument, which GDB uses to relocate debugging
12205 information from a shared library based on the address at
12206 which the library was loaded. */
12207 CORE_ADDR base
= cu
->base_address
;
12208 int base_known
= cu
->base_known
;
12210 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12211 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12213 complaint (&symfile_complaints
,
12214 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12218 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12222 unsigned int bytes_read
;
12223 CORE_ADDR start
, end
;
12225 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12226 buffer
+= bytes_read
;
12227 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12228 buffer
+= bytes_read
;
12230 /* Did we find the end of the range list? */
12231 if (start
== 0 && end
== 0)
12234 /* Did we find a base address selection entry? */
12235 else if ((start
& base_select_mask
) == base_select_mask
)
12241 /* We found an ordinary address range. */
12246 complaint (&symfile_complaints
,
12247 _("Invalid .debug_ranges data "
12248 "(no base address)"));
12254 /* Inverted range entries are invalid. */
12255 complaint (&symfile_complaints
,
12256 _("Invalid .debug_ranges data "
12257 "(inverted range)"));
12261 /* Empty range entries have no effect. */
12265 start
+= base
+ baseaddr
;
12266 end
+= base
+ baseaddr
;
12268 /* A not-uncommon case of bad debug info.
12269 Don't pollute the addrmap with bad data. */
12270 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12272 complaint (&symfile_complaints
,
12273 _(".debug_ranges entry has start address of zero"
12274 " [in module %s]"), objfile_name (objfile
));
12278 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12279 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12280 record_block_range (block
, start
, end
- 1);
12286 /* Check whether the producer field indicates either of GCC < 4.6, or the
12287 Intel C/C++ compiler, and cache the result in CU. */
12290 check_producer (struct dwarf2_cu
*cu
)
12295 if (cu
->producer
== NULL
)
12297 /* For unknown compilers expect their behavior is DWARF version
12300 GCC started to support .debug_types sections by -gdwarf-4 since
12301 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12302 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12303 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12304 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12306 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12308 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12309 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12311 else if (startswith (cu
->producer
, "Intel(R) C"))
12312 cu
->producer_is_icc
= 1;
12315 /* For other non-GCC compilers, expect their behavior is DWARF version
12319 cu
->checked_producer
= 1;
12322 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12323 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12324 during 4.6.0 experimental. */
12327 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12329 if (!cu
->checked_producer
)
12330 check_producer (cu
);
12332 return cu
->producer_is_gxx_lt_4_6
;
12335 /* Return the default accessibility type if it is not overriden by
12336 DW_AT_accessibility. */
12338 static enum dwarf_access_attribute
12339 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12341 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12343 /* The default DWARF 2 accessibility for members is public, the default
12344 accessibility for inheritance is private. */
12346 if (die
->tag
!= DW_TAG_inheritance
)
12347 return DW_ACCESS_public
;
12349 return DW_ACCESS_private
;
12353 /* DWARF 3+ defines the default accessibility a different way. The same
12354 rules apply now for DW_TAG_inheritance as for the members and it only
12355 depends on the container kind. */
12357 if (die
->parent
->tag
== DW_TAG_class_type
)
12358 return DW_ACCESS_private
;
12360 return DW_ACCESS_public
;
12364 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12365 offset. If the attribute was not found return 0, otherwise return
12366 1. If it was found but could not properly be handled, set *OFFSET
12370 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12373 struct attribute
*attr
;
12375 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12380 /* Note that we do not check for a section offset first here.
12381 This is because DW_AT_data_member_location is new in DWARF 4,
12382 so if we see it, we can assume that a constant form is really
12383 a constant and not a section offset. */
12384 if (attr_form_is_constant (attr
))
12385 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12386 else if (attr_form_is_section_offset (attr
))
12387 dwarf2_complex_location_expr_complaint ();
12388 else if (attr_form_is_block (attr
))
12389 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12391 dwarf2_complex_location_expr_complaint ();
12399 /* Add an aggregate field to the field list. */
12402 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12403 struct dwarf2_cu
*cu
)
12405 struct objfile
*objfile
= cu
->objfile
;
12406 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12407 struct nextfield
*new_field
;
12408 struct attribute
*attr
;
12410 const char *fieldname
= "";
12412 /* Allocate a new field list entry and link it in. */
12413 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12414 make_cleanup (xfree
, new_field
);
12415 memset (new_field
, 0, sizeof (struct nextfield
));
12417 if (die
->tag
== DW_TAG_inheritance
)
12419 new_field
->next
= fip
->baseclasses
;
12420 fip
->baseclasses
= new_field
;
12424 new_field
->next
= fip
->fields
;
12425 fip
->fields
= new_field
;
12429 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12431 new_field
->accessibility
= DW_UNSND (attr
);
12433 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12434 if (new_field
->accessibility
!= DW_ACCESS_public
)
12435 fip
->non_public_fields
= 1;
12437 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12439 new_field
->virtuality
= DW_UNSND (attr
);
12441 new_field
->virtuality
= DW_VIRTUALITY_none
;
12443 fp
= &new_field
->field
;
12445 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12449 /* Data member other than a C++ static data member. */
12451 /* Get type of field. */
12452 fp
->type
= die_type (die
, cu
);
12454 SET_FIELD_BITPOS (*fp
, 0);
12456 /* Get bit size of field (zero if none). */
12457 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12460 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12464 FIELD_BITSIZE (*fp
) = 0;
12467 /* Get bit offset of field. */
12468 if (handle_data_member_location (die
, cu
, &offset
))
12469 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12470 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12473 if (gdbarch_bits_big_endian (gdbarch
))
12475 /* For big endian bits, the DW_AT_bit_offset gives the
12476 additional bit offset from the MSB of the containing
12477 anonymous object to the MSB of the field. We don't
12478 have to do anything special since we don't need to
12479 know the size of the anonymous object. */
12480 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12484 /* For little endian bits, compute the bit offset to the
12485 MSB of the anonymous object, subtract off the number of
12486 bits from the MSB of the field to the MSB of the
12487 object, and then subtract off the number of bits of
12488 the field itself. The result is the bit offset of
12489 the LSB of the field. */
12490 int anonymous_size
;
12491 int bit_offset
= DW_UNSND (attr
);
12493 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12496 /* The size of the anonymous object containing
12497 the bit field is explicit, so use the
12498 indicated size (in bytes). */
12499 anonymous_size
= DW_UNSND (attr
);
12503 /* The size of the anonymous object containing
12504 the bit field must be inferred from the type
12505 attribute of the data member containing the
12507 anonymous_size
= TYPE_LENGTH (fp
->type
);
12509 SET_FIELD_BITPOS (*fp
,
12510 (FIELD_BITPOS (*fp
)
12511 + anonymous_size
* bits_per_byte
12512 - bit_offset
- FIELD_BITSIZE (*fp
)));
12516 /* Get name of field. */
12517 fieldname
= dwarf2_name (die
, cu
);
12518 if (fieldname
== NULL
)
12521 /* The name is already allocated along with this objfile, so we don't
12522 need to duplicate it for the type. */
12523 fp
->name
= fieldname
;
12525 /* Change accessibility for artificial fields (e.g. virtual table
12526 pointer or virtual base class pointer) to private. */
12527 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12529 FIELD_ARTIFICIAL (*fp
) = 1;
12530 new_field
->accessibility
= DW_ACCESS_private
;
12531 fip
->non_public_fields
= 1;
12534 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12536 /* C++ static member. */
12538 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12539 is a declaration, but all versions of G++ as of this writing
12540 (so through at least 3.2.1) incorrectly generate
12541 DW_TAG_variable tags. */
12543 const char *physname
;
12545 /* Get name of field. */
12546 fieldname
= dwarf2_name (die
, cu
);
12547 if (fieldname
== NULL
)
12550 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12552 /* Only create a symbol if this is an external value.
12553 new_symbol checks this and puts the value in the global symbol
12554 table, which we want. If it is not external, new_symbol
12555 will try to put the value in cu->list_in_scope which is wrong. */
12556 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12558 /* A static const member, not much different than an enum as far as
12559 we're concerned, except that we can support more types. */
12560 new_symbol (die
, NULL
, cu
);
12563 /* Get physical name. */
12564 physname
= dwarf2_physname (fieldname
, die
, cu
);
12566 /* The name is already allocated along with this objfile, so we don't
12567 need to duplicate it for the type. */
12568 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12569 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12570 FIELD_NAME (*fp
) = fieldname
;
12572 else if (die
->tag
== DW_TAG_inheritance
)
12576 /* C++ base class field. */
12577 if (handle_data_member_location (die
, cu
, &offset
))
12578 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12579 FIELD_BITSIZE (*fp
) = 0;
12580 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12581 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12582 fip
->nbaseclasses
++;
12586 /* Add a typedef defined in the scope of the FIP's class. */
12589 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12590 struct dwarf2_cu
*cu
)
12592 struct objfile
*objfile
= cu
->objfile
;
12593 struct typedef_field_list
*new_field
;
12594 struct attribute
*attr
;
12595 struct typedef_field
*fp
;
12596 char *fieldname
= "";
12598 /* Allocate a new field list entry and link it in. */
12599 new_field
= xzalloc (sizeof (*new_field
));
12600 make_cleanup (xfree
, new_field
);
12602 gdb_assert (die
->tag
== DW_TAG_typedef
);
12604 fp
= &new_field
->field
;
12606 /* Get name of field. */
12607 fp
->name
= dwarf2_name (die
, cu
);
12608 if (fp
->name
== NULL
)
12611 fp
->type
= read_type_die (die
, cu
);
12613 new_field
->next
= fip
->typedef_field_list
;
12614 fip
->typedef_field_list
= new_field
;
12615 fip
->typedef_field_list_count
++;
12618 /* Create the vector of fields, and attach it to the type. */
12621 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12622 struct dwarf2_cu
*cu
)
12624 int nfields
= fip
->nfields
;
12626 /* Record the field count, allocate space for the array of fields,
12627 and create blank accessibility bitfields if necessary. */
12628 TYPE_NFIELDS (type
) = nfields
;
12629 TYPE_FIELDS (type
) = (struct field
*)
12630 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12631 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12633 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12635 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12637 TYPE_FIELD_PRIVATE_BITS (type
) =
12638 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12639 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12641 TYPE_FIELD_PROTECTED_BITS (type
) =
12642 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12643 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12645 TYPE_FIELD_IGNORE_BITS (type
) =
12646 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12647 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12650 /* If the type has baseclasses, allocate and clear a bit vector for
12651 TYPE_FIELD_VIRTUAL_BITS. */
12652 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12654 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12655 unsigned char *pointer
;
12657 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12658 pointer
= TYPE_ALLOC (type
, num_bytes
);
12659 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12660 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12661 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12664 /* Copy the saved-up fields into the field vector. Start from the head of
12665 the list, adding to the tail of the field array, so that they end up in
12666 the same order in the array in which they were added to the list. */
12667 while (nfields
-- > 0)
12669 struct nextfield
*fieldp
;
12673 fieldp
= fip
->fields
;
12674 fip
->fields
= fieldp
->next
;
12678 fieldp
= fip
->baseclasses
;
12679 fip
->baseclasses
= fieldp
->next
;
12682 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12683 switch (fieldp
->accessibility
)
12685 case DW_ACCESS_private
:
12686 if (cu
->language
!= language_ada
)
12687 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12690 case DW_ACCESS_protected
:
12691 if (cu
->language
!= language_ada
)
12692 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12695 case DW_ACCESS_public
:
12699 /* Unknown accessibility. Complain and treat it as public. */
12701 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12702 fieldp
->accessibility
);
12706 if (nfields
< fip
->nbaseclasses
)
12708 switch (fieldp
->virtuality
)
12710 case DW_VIRTUALITY_virtual
:
12711 case DW_VIRTUALITY_pure_virtual
:
12712 if (cu
->language
== language_ada
)
12713 error (_("unexpected virtuality in component of Ada type"));
12714 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12721 /* Return true if this member function is a constructor, false
12725 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12727 const char *fieldname
;
12728 const char *type_name
;
12731 if (die
->parent
== NULL
)
12734 if (die
->parent
->tag
!= DW_TAG_structure_type
12735 && die
->parent
->tag
!= DW_TAG_union_type
12736 && die
->parent
->tag
!= DW_TAG_class_type
)
12739 fieldname
= dwarf2_name (die
, cu
);
12740 type_name
= dwarf2_name (die
->parent
, cu
);
12741 if (fieldname
== NULL
|| type_name
== NULL
)
12744 len
= strlen (fieldname
);
12745 return (strncmp (fieldname
, type_name
, len
) == 0
12746 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12749 /* Add a member function to the proper fieldlist. */
12752 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12753 struct type
*type
, struct dwarf2_cu
*cu
)
12755 struct objfile
*objfile
= cu
->objfile
;
12756 struct attribute
*attr
;
12757 struct fnfieldlist
*flp
;
12759 struct fn_field
*fnp
;
12760 const char *fieldname
;
12761 struct nextfnfield
*new_fnfield
;
12762 struct type
*this_type
;
12763 enum dwarf_access_attribute accessibility
;
12765 if (cu
->language
== language_ada
)
12766 error (_("unexpected member function in Ada type"));
12768 /* Get name of member function. */
12769 fieldname
= dwarf2_name (die
, cu
);
12770 if (fieldname
== NULL
)
12773 /* Look up member function name in fieldlist. */
12774 for (i
= 0; i
< fip
->nfnfields
; i
++)
12776 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12780 /* Create new list element if necessary. */
12781 if (i
< fip
->nfnfields
)
12782 flp
= &fip
->fnfieldlists
[i
];
12785 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12787 fip
->fnfieldlists
= (struct fnfieldlist
*)
12788 xrealloc (fip
->fnfieldlists
,
12789 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12790 * sizeof (struct fnfieldlist
));
12791 if (fip
->nfnfields
== 0)
12792 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12794 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12795 flp
->name
= fieldname
;
12798 i
= fip
->nfnfields
++;
12801 /* Create a new member function field and chain it to the field list
12803 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12804 make_cleanup (xfree
, new_fnfield
);
12805 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12806 new_fnfield
->next
= flp
->head
;
12807 flp
->head
= new_fnfield
;
12810 /* Fill in the member function field info. */
12811 fnp
= &new_fnfield
->fnfield
;
12813 /* Delay processing of the physname until later. */
12814 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12816 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12821 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12822 fnp
->physname
= physname
? physname
: "";
12825 fnp
->type
= alloc_type (objfile
);
12826 this_type
= read_type_die (die
, cu
);
12827 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12829 int nparams
= TYPE_NFIELDS (this_type
);
12831 /* TYPE is the domain of this method, and THIS_TYPE is the type
12832 of the method itself (TYPE_CODE_METHOD). */
12833 smash_to_method_type (fnp
->type
, type
,
12834 TYPE_TARGET_TYPE (this_type
),
12835 TYPE_FIELDS (this_type
),
12836 TYPE_NFIELDS (this_type
),
12837 TYPE_VARARGS (this_type
));
12839 /* Handle static member functions.
12840 Dwarf2 has no clean way to discern C++ static and non-static
12841 member functions. G++ helps GDB by marking the first
12842 parameter for non-static member functions (which is the this
12843 pointer) as artificial. We obtain this information from
12844 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12845 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12846 fnp
->voffset
= VOFFSET_STATIC
;
12849 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12850 dwarf2_full_name (fieldname
, die
, cu
));
12852 /* Get fcontext from DW_AT_containing_type if present. */
12853 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12854 fnp
->fcontext
= die_containing_type (die
, cu
);
12856 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12857 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12859 /* Get accessibility. */
12860 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12862 accessibility
= DW_UNSND (attr
);
12864 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12865 switch (accessibility
)
12867 case DW_ACCESS_private
:
12868 fnp
->is_private
= 1;
12870 case DW_ACCESS_protected
:
12871 fnp
->is_protected
= 1;
12875 /* Check for artificial methods. */
12876 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12877 if (attr
&& DW_UNSND (attr
) != 0)
12878 fnp
->is_artificial
= 1;
12880 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12882 /* Get index in virtual function table if it is a virtual member
12883 function. For older versions of GCC, this is an offset in the
12884 appropriate virtual table, as specified by DW_AT_containing_type.
12885 For everyone else, it is an expression to be evaluated relative
12886 to the object address. */
12888 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12891 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12893 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12895 /* Old-style GCC. */
12896 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12898 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12899 || (DW_BLOCK (attr
)->size
> 1
12900 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12901 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12903 struct dwarf_block blk
;
12906 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12908 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12909 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12910 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12911 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12912 dwarf2_complex_location_expr_complaint ();
12914 fnp
->voffset
/= cu
->header
.addr_size
;
12918 dwarf2_complex_location_expr_complaint ();
12920 if (!fnp
->fcontext
)
12921 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12923 else if (attr_form_is_section_offset (attr
))
12925 dwarf2_complex_location_expr_complaint ();
12929 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12935 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12936 if (attr
&& DW_UNSND (attr
))
12938 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12939 complaint (&symfile_complaints
,
12940 _("Member function \"%s\" (offset %d) is virtual "
12941 "but the vtable offset is not specified"),
12942 fieldname
, die
->offset
.sect_off
);
12943 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12944 TYPE_CPLUS_DYNAMIC (type
) = 1;
12949 /* Create the vector of member function fields, and attach it to the type. */
12952 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12953 struct dwarf2_cu
*cu
)
12955 struct fnfieldlist
*flp
;
12958 if (cu
->language
== language_ada
)
12959 error (_("unexpected member functions in Ada type"));
12961 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12962 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12963 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12965 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12967 struct nextfnfield
*nfp
= flp
->head
;
12968 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12971 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12972 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12973 fn_flp
->fn_fields
= (struct fn_field
*)
12974 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12975 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12976 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12979 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
12982 /* Returns non-zero if NAME is the name of a vtable member in CU's
12983 language, zero otherwise. */
12985 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
12987 static const char vptr
[] = "_vptr";
12988 static const char vtable
[] = "vtable";
12990 /* Look for the C++ and Java forms of the vtable. */
12991 if ((cu
->language
== language_java
12992 && startswith (name
, vtable
))
12993 || (startswith (name
, vptr
)
12994 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13000 /* GCC outputs unnamed structures that are really pointers to member
13001 functions, with the ABI-specified layout. If TYPE describes
13002 such a structure, smash it into a member function type.
13004 GCC shouldn't do this; it should just output pointer to member DIEs.
13005 This is GCC PR debug/28767. */
13008 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13010 struct type
*pfn_type
, *self_type
, *new_type
;
13012 /* Check for a structure with no name and two children. */
13013 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13016 /* Check for __pfn and __delta members. */
13017 if (TYPE_FIELD_NAME (type
, 0) == NULL
13018 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13019 || TYPE_FIELD_NAME (type
, 1) == NULL
13020 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13023 /* Find the type of the method. */
13024 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13025 if (pfn_type
== NULL
13026 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13027 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13030 /* Look for the "this" argument. */
13031 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13032 if (TYPE_NFIELDS (pfn_type
) == 0
13033 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13034 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13037 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13038 new_type
= alloc_type (objfile
);
13039 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13040 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13041 TYPE_VARARGS (pfn_type
));
13042 smash_to_methodptr_type (type
, new_type
);
13045 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13049 producer_is_icc (struct dwarf2_cu
*cu
)
13051 if (!cu
->checked_producer
)
13052 check_producer (cu
);
13054 return cu
->producer_is_icc
;
13057 /* Called when we find the DIE that starts a structure or union scope
13058 (definition) to create a type for the structure or union. Fill in
13059 the type's name and general properties; the members will not be
13060 processed until process_structure_scope. A symbol table entry for
13061 the type will also not be done until process_structure_scope (assuming
13062 the type has a name).
13064 NOTE: we need to call these functions regardless of whether or not the
13065 DIE has a DW_AT_name attribute, since it might be an anonymous
13066 structure or union. This gets the type entered into our set of
13067 user defined types. */
13069 static struct type
*
13070 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13072 struct objfile
*objfile
= cu
->objfile
;
13074 struct attribute
*attr
;
13077 /* If the definition of this type lives in .debug_types, read that type.
13078 Don't follow DW_AT_specification though, that will take us back up
13079 the chain and we want to go down. */
13080 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13083 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13085 /* The type's CU may not be the same as CU.
13086 Ensure TYPE is recorded with CU in die_type_hash. */
13087 return set_die_type (die
, type
, cu
);
13090 type
= alloc_type (objfile
);
13091 INIT_CPLUS_SPECIFIC (type
);
13093 name
= dwarf2_name (die
, cu
);
13096 if (cu
->language
== language_cplus
13097 || cu
->language
== language_java
)
13099 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13101 /* dwarf2_full_name might have already finished building the DIE's
13102 type. If so, there is no need to continue. */
13103 if (get_die_type (die
, cu
) != NULL
)
13104 return get_die_type (die
, cu
);
13106 TYPE_TAG_NAME (type
) = full_name
;
13107 if (die
->tag
== DW_TAG_structure_type
13108 || die
->tag
== DW_TAG_class_type
)
13109 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13113 /* The name is already allocated along with this objfile, so
13114 we don't need to duplicate it for the type. */
13115 TYPE_TAG_NAME (type
) = name
;
13116 if (die
->tag
== DW_TAG_class_type
)
13117 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13121 if (die
->tag
== DW_TAG_structure_type
)
13123 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13125 else if (die
->tag
== DW_TAG_union_type
)
13127 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13131 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13134 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13135 TYPE_DECLARED_CLASS (type
) = 1;
13137 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13140 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13144 TYPE_LENGTH (type
) = 0;
13147 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13149 /* ICC does not output the required DW_AT_declaration
13150 on incomplete types, but gives them a size of zero. */
13151 TYPE_STUB (type
) = 1;
13154 TYPE_STUB_SUPPORTED (type
) = 1;
13156 if (die_is_declaration (die
, cu
))
13157 TYPE_STUB (type
) = 1;
13158 else if (attr
== NULL
&& die
->child
== NULL
13159 && producer_is_realview (cu
->producer
))
13160 /* RealView does not output the required DW_AT_declaration
13161 on incomplete types. */
13162 TYPE_STUB (type
) = 1;
13164 /* We need to add the type field to the die immediately so we don't
13165 infinitely recurse when dealing with pointers to the structure
13166 type within the structure itself. */
13167 set_die_type (die
, type
, cu
);
13169 /* set_die_type should be already done. */
13170 set_descriptive_type (type
, die
, cu
);
13175 /* Finish creating a structure or union type, including filling in
13176 its members and creating a symbol for it. */
13179 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13181 struct objfile
*objfile
= cu
->objfile
;
13182 struct die_info
*child_die
;
13185 type
= get_die_type (die
, cu
);
13187 type
= read_structure_type (die
, cu
);
13189 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13191 struct field_info fi
;
13192 VEC (symbolp
) *template_args
= NULL
;
13193 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13195 memset (&fi
, 0, sizeof (struct field_info
));
13197 child_die
= die
->child
;
13199 while (child_die
&& child_die
->tag
)
13201 if (child_die
->tag
== DW_TAG_member
13202 || child_die
->tag
== DW_TAG_variable
)
13204 /* NOTE: carlton/2002-11-05: A C++ static data member
13205 should be a DW_TAG_member that is a declaration, but
13206 all versions of G++ as of this writing (so through at
13207 least 3.2.1) incorrectly generate DW_TAG_variable
13208 tags for them instead. */
13209 dwarf2_add_field (&fi
, child_die
, cu
);
13211 else if (child_die
->tag
== DW_TAG_subprogram
)
13213 /* C++ member function. */
13214 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13216 else if (child_die
->tag
== DW_TAG_inheritance
)
13218 /* C++ base class field. */
13219 dwarf2_add_field (&fi
, child_die
, cu
);
13221 else if (child_die
->tag
== DW_TAG_typedef
)
13222 dwarf2_add_typedef (&fi
, child_die
, cu
);
13223 else if (child_die
->tag
== DW_TAG_template_type_param
13224 || child_die
->tag
== DW_TAG_template_value_param
)
13226 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13229 VEC_safe_push (symbolp
, template_args
, arg
);
13232 child_die
= sibling_die (child_die
);
13235 /* Attach template arguments to type. */
13236 if (! VEC_empty (symbolp
, template_args
))
13238 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13239 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13240 = VEC_length (symbolp
, template_args
);
13241 TYPE_TEMPLATE_ARGUMENTS (type
)
13242 = obstack_alloc (&objfile
->objfile_obstack
,
13243 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13244 * sizeof (struct symbol
*)));
13245 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13246 VEC_address (symbolp
, template_args
),
13247 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13248 * sizeof (struct symbol
*)));
13249 VEC_free (symbolp
, template_args
);
13252 /* Attach fields and member functions to the type. */
13254 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13257 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13259 /* Get the type which refers to the base class (possibly this
13260 class itself) which contains the vtable pointer for the current
13261 class from the DW_AT_containing_type attribute. This use of
13262 DW_AT_containing_type is a GNU extension. */
13264 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13266 struct type
*t
= die_containing_type (die
, cu
);
13268 set_type_vptr_basetype (type
, t
);
13273 /* Our own class provides vtbl ptr. */
13274 for (i
= TYPE_NFIELDS (t
) - 1;
13275 i
>= TYPE_N_BASECLASSES (t
);
13278 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13280 if (is_vtable_name (fieldname
, cu
))
13282 set_type_vptr_fieldno (type
, i
);
13287 /* Complain if virtual function table field not found. */
13288 if (i
< TYPE_N_BASECLASSES (t
))
13289 complaint (&symfile_complaints
,
13290 _("virtual function table pointer "
13291 "not found when defining class '%s'"),
13292 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13297 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13300 else if (cu
->producer
13301 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13303 /* The IBM XLC compiler does not provide direct indication
13304 of the containing type, but the vtable pointer is
13305 always named __vfp. */
13309 for (i
= TYPE_NFIELDS (type
) - 1;
13310 i
>= TYPE_N_BASECLASSES (type
);
13313 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13315 set_type_vptr_fieldno (type
, i
);
13316 set_type_vptr_basetype (type
, type
);
13323 /* Copy fi.typedef_field_list linked list elements content into the
13324 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13325 if (fi
.typedef_field_list
)
13327 int i
= fi
.typedef_field_list_count
;
13329 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13330 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13331 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13332 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13334 /* Reverse the list order to keep the debug info elements order. */
13337 struct typedef_field
*dest
, *src
;
13339 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13340 src
= &fi
.typedef_field_list
->field
;
13341 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13346 do_cleanups (back_to
);
13348 if (HAVE_CPLUS_STRUCT (type
))
13349 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13352 quirk_gcc_member_function_pointer (type
, objfile
);
13354 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13355 snapshots) has been known to create a die giving a declaration
13356 for a class that has, as a child, a die giving a definition for a
13357 nested class. So we have to process our children even if the
13358 current die is a declaration. Normally, of course, a declaration
13359 won't have any children at all. */
13361 child_die
= die
->child
;
13363 while (child_die
!= NULL
&& child_die
->tag
)
13365 if (child_die
->tag
== DW_TAG_member
13366 || child_die
->tag
== DW_TAG_variable
13367 || child_die
->tag
== DW_TAG_inheritance
13368 || child_die
->tag
== DW_TAG_template_value_param
13369 || child_die
->tag
== DW_TAG_template_type_param
)
13374 process_die (child_die
, cu
);
13376 child_die
= sibling_die (child_die
);
13379 /* Do not consider external references. According to the DWARF standard,
13380 these DIEs are identified by the fact that they have no byte_size
13381 attribute, and a declaration attribute. */
13382 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13383 || !die_is_declaration (die
, cu
))
13384 new_symbol (die
, type
, cu
);
13387 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13388 update TYPE using some information only available in DIE's children. */
13391 update_enumeration_type_from_children (struct die_info
*die
,
13393 struct dwarf2_cu
*cu
)
13395 struct obstack obstack
;
13396 struct die_info
*child_die
;
13397 int unsigned_enum
= 1;
13400 struct cleanup
*old_chain
;
13402 obstack_init (&obstack
);
13403 old_chain
= make_cleanup_obstack_free (&obstack
);
13405 for (child_die
= die
->child
;
13406 child_die
!= NULL
&& child_die
->tag
;
13407 child_die
= sibling_die (child_die
))
13409 struct attribute
*attr
;
13411 const gdb_byte
*bytes
;
13412 struct dwarf2_locexpr_baton
*baton
;
13415 if (child_die
->tag
!= DW_TAG_enumerator
)
13418 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13422 name
= dwarf2_name (child_die
, cu
);
13424 name
= "<anonymous enumerator>";
13426 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13427 &value
, &bytes
, &baton
);
13433 else if ((mask
& value
) != 0)
13438 /* If we already know that the enum type is neither unsigned, nor
13439 a flag type, no need to look at the rest of the enumerates. */
13440 if (!unsigned_enum
&& !flag_enum
)
13445 TYPE_UNSIGNED (type
) = 1;
13447 TYPE_FLAG_ENUM (type
) = 1;
13449 do_cleanups (old_chain
);
13452 /* Given a DW_AT_enumeration_type die, set its type. We do not
13453 complete the type's fields yet, or create any symbols. */
13455 static struct type
*
13456 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13458 struct objfile
*objfile
= cu
->objfile
;
13460 struct attribute
*attr
;
13463 /* If the definition of this type lives in .debug_types, read that type.
13464 Don't follow DW_AT_specification though, that will take us back up
13465 the chain and we want to go down. */
13466 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13469 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13471 /* The type's CU may not be the same as CU.
13472 Ensure TYPE is recorded with CU in die_type_hash. */
13473 return set_die_type (die
, type
, cu
);
13476 type
= alloc_type (objfile
);
13478 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13479 name
= dwarf2_full_name (NULL
, die
, cu
);
13481 TYPE_TAG_NAME (type
) = name
;
13483 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13486 struct type
*underlying_type
= die_type (die
, cu
);
13488 TYPE_TARGET_TYPE (type
) = underlying_type
;
13491 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13494 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13498 TYPE_LENGTH (type
) = 0;
13501 /* The enumeration DIE can be incomplete. In Ada, any type can be
13502 declared as private in the package spec, and then defined only
13503 inside the package body. Such types are known as Taft Amendment
13504 Types. When another package uses such a type, an incomplete DIE
13505 may be generated by the compiler. */
13506 if (die_is_declaration (die
, cu
))
13507 TYPE_STUB (type
) = 1;
13509 /* Finish the creation of this type by using the enum's children.
13510 We must call this even when the underlying type has been provided
13511 so that we can determine if we're looking at a "flag" enum. */
13512 update_enumeration_type_from_children (die
, type
, cu
);
13514 /* If this type has an underlying type that is not a stub, then we
13515 may use its attributes. We always use the "unsigned" attribute
13516 in this situation, because ordinarily we guess whether the type
13517 is unsigned -- but the guess can be wrong and the underlying type
13518 can tell us the reality. However, we defer to a local size
13519 attribute if one exists, because this lets the compiler override
13520 the underlying type if needed. */
13521 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13523 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13524 if (TYPE_LENGTH (type
) == 0)
13525 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13528 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13530 return set_die_type (die
, type
, cu
);
13533 /* Given a pointer to a die which begins an enumeration, process all
13534 the dies that define the members of the enumeration, and create the
13535 symbol for the enumeration type.
13537 NOTE: We reverse the order of the element list. */
13540 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13542 struct type
*this_type
;
13544 this_type
= get_die_type (die
, cu
);
13545 if (this_type
== NULL
)
13546 this_type
= read_enumeration_type (die
, cu
);
13548 if (die
->child
!= NULL
)
13550 struct die_info
*child_die
;
13551 struct symbol
*sym
;
13552 struct field
*fields
= NULL
;
13553 int num_fields
= 0;
13556 child_die
= die
->child
;
13557 while (child_die
&& child_die
->tag
)
13559 if (child_die
->tag
!= DW_TAG_enumerator
)
13561 process_die (child_die
, cu
);
13565 name
= dwarf2_name (child_die
, cu
);
13568 sym
= new_symbol (child_die
, this_type
, cu
);
13570 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13572 fields
= (struct field
*)
13574 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13575 * sizeof (struct field
));
13578 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13579 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13580 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13581 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13587 child_die
= sibling_die (child_die
);
13592 TYPE_NFIELDS (this_type
) = num_fields
;
13593 TYPE_FIELDS (this_type
) = (struct field
*)
13594 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13595 memcpy (TYPE_FIELDS (this_type
), fields
,
13596 sizeof (struct field
) * num_fields
);
13601 /* If we are reading an enum from a .debug_types unit, and the enum
13602 is a declaration, and the enum is not the signatured type in the
13603 unit, then we do not want to add a symbol for it. Adding a
13604 symbol would in some cases obscure the true definition of the
13605 enum, giving users an incomplete type when the definition is
13606 actually available. Note that we do not want to do this for all
13607 enums which are just declarations, because C++0x allows forward
13608 enum declarations. */
13609 if (cu
->per_cu
->is_debug_types
13610 && die_is_declaration (die
, cu
))
13612 struct signatured_type
*sig_type
;
13614 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13615 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13616 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13620 new_symbol (die
, this_type
, cu
);
13623 /* Extract all information from a DW_TAG_array_type DIE and put it in
13624 the DIE's type field. For now, this only handles one dimensional
13627 static struct type
*
13628 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13630 struct objfile
*objfile
= cu
->objfile
;
13631 struct die_info
*child_die
;
13633 struct type
*element_type
, *range_type
, *index_type
;
13634 struct type
**range_types
= NULL
;
13635 struct attribute
*attr
;
13637 struct cleanup
*back_to
;
13639 unsigned int bit_stride
= 0;
13641 element_type
= die_type (die
, cu
);
13643 /* The die_type call above may have already set the type for this DIE. */
13644 type
= get_die_type (die
, cu
);
13648 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13650 bit_stride
= DW_UNSND (attr
) * 8;
13652 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13654 bit_stride
= DW_UNSND (attr
);
13656 /* Irix 6.2 native cc creates array types without children for
13657 arrays with unspecified length. */
13658 if (die
->child
== NULL
)
13660 index_type
= objfile_type (objfile
)->builtin_int
;
13661 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13662 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13664 return set_die_type (die
, type
, cu
);
13667 back_to
= make_cleanup (null_cleanup
, NULL
);
13668 child_die
= die
->child
;
13669 while (child_die
&& child_die
->tag
)
13671 if (child_die
->tag
== DW_TAG_subrange_type
)
13673 struct type
*child_type
= read_type_die (child_die
, cu
);
13675 if (child_type
!= NULL
)
13677 /* The range type was succesfully read. Save it for the
13678 array type creation. */
13679 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13681 range_types
= (struct type
**)
13682 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13683 * sizeof (struct type
*));
13685 make_cleanup (free_current_contents
, &range_types
);
13687 range_types
[ndim
++] = child_type
;
13690 child_die
= sibling_die (child_die
);
13693 /* Dwarf2 dimensions are output from left to right, create the
13694 necessary array types in backwards order. */
13696 type
= element_type
;
13698 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13703 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13709 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13713 /* Understand Dwarf2 support for vector types (like they occur on
13714 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13715 array type. This is not part of the Dwarf2/3 standard yet, but a
13716 custom vendor extension. The main difference between a regular
13717 array and the vector variant is that vectors are passed by value
13719 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13721 make_vector_type (type
);
13723 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13724 implementation may choose to implement triple vectors using this
13726 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13729 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13730 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13732 complaint (&symfile_complaints
,
13733 _("DW_AT_byte_size for array type smaller "
13734 "than the total size of elements"));
13737 name
= dwarf2_name (die
, cu
);
13739 TYPE_NAME (type
) = name
;
13741 /* Install the type in the die. */
13742 set_die_type (die
, type
, cu
);
13744 /* set_die_type should be already done. */
13745 set_descriptive_type (type
, die
, cu
);
13747 do_cleanups (back_to
);
13752 static enum dwarf_array_dim_ordering
13753 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13755 struct attribute
*attr
;
13757 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13759 if (attr
) return DW_SND (attr
);
13761 /* GNU F77 is a special case, as at 08/2004 array type info is the
13762 opposite order to the dwarf2 specification, but data is still
13763 laid out as per normal fortran.
13765 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13766 version checking. */
13768 if (cu
->language
== language_fortran
13769 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13771 return DW_ORD_row_major
;
13774 switch (cu
->language_defn
->la_array_ordering
)
13776 case array_column_major
:
13777 return DW_ORD_col_major
;
13778 case array_row_major
:
13780 return DW_ORD_row_major
;
13784 /* Extract all information from a DW_TAG_set_type DIE and put it in
13785 the DIE's type field. */
13787 static struct type
*
13788 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13790 struct type
*domain_type
, *set_type
;
13791 struct attribute
*attr
;
13793 domain_type
= die_type (die
, cu
);
13795 /* The die_type call above may have already set the type for this DIE. */
13796 set_type
= get_die_type (die
, cu
);
13800 set_type
= create_set_type (NULL
, domain_type
);
13802 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13804 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13806 return set_die_type (die
, set_type
, cu
);
13809 /* A helper for read_common_block that creates a locexpr baton.
13810 SYM is the symbol which we are marking as computed.
13811 COMMON_DIE is the DIE for the common block.
13812 COMMON_LOC is the location expression attribute for the common
13814 MEMBER_LOC is the location expression attribute for the particular
13815 member of the common block that we are processing.
13816 CU is the CU from which the above come. */
13819 mark_common_block_symbol_computed (struct symbol
*sym
,
13820 struct die_info
*common_die
,
13821 struct attribute
*common_loc
,
13822 struct attribute
*member_loc
,
13823 struct dwarf2_cu
*cu
)
13825 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13826 struct dwarf2_locexpr_baton
*baton
;
13828 unsigned int cu_off
;
13829 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13830 LONGEST offset
= 0;
13832 gdb_assert (common_loc
&& member_loc
);
13833 gdb_assert (attr_form_is_block (common_loc
));
13834 gdb_assert (attr_form_is_block (member_loc
)
13835 || attr_form_is_constant (member_loc
));
13837 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13838 sizeof (struct dwarf2_locexpr_baton
));
13839 baton
->per_cu
= cu
->per_cu
;
13840 gdb_assert (baton
->per_cu
);
13842 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13844 if (attr_form_is_constant (member_loc
))
13846 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13847 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13850 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13852 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13855 *ptr
++ = DW_OP_call4
;
13856 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13857 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13860 if (attr_form_is_constant (member_loc
))
13862 *ptr
++ = DW_OP_addr
;
13863 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13864 ptr
+= cu
->header
.addr_size
;
13868 /* We have to copy the data here, because DW_OP_call4 will only
13869 use a DW_AT_location attribute. */
13870 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13871 ptr
+= DW_BLOCK (member_loc
)->size
;
13874 *ptr
++ = DW_OP_plus
;
13875 gdb_assert (ptr
- baton
->data
== baton
->size
);
13877 SYMBOL_LOCATION_BATON (sym
) = baton
;
13878 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13881 /* Create appropriate locally-scoped variables for all the
13882 DW_TAG_common_block entries. Also create a struct common_block
13883 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13884 is used to sepate the common blocks name namespace from regular
13888 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13890 struct attribute
*attr
;
13892 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13895 /* Support the .debug_loc offsets. */
13896 if (attr_form_is_block (attr
))
13900 else if (attr_form_is_section_offset (attr
))
13902 dwarf2_complex_location_expr_complaint ();
13907 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13908 "common block member");
13913 if (die
->child
!= NULL
)
13915 struct objfile
*objfile
= cu
->objfile
;
13916 struct die_info
*child_die
;
13917 size_t n_entries
= 0, size
;
13918 struct common_block
*common_block
;
13919 struct symbol
*sym
;
13921 for (child_die
= die
->child
;
13922 child_die
&& child_die
->tag
;
13923 child_die
= sibling_die (child_die
))
13926 size
= (sizeof (struct common_block
)
13927 + (n_entries
- 1) * sizeof (struct symbol
*));
13928 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13929 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13930 common_block
->n_entries
= 0;
13932 for (child_die
= die
->child
;
13933 child_die
&& child_die
->tag
;
13934 child_die
= sibling_die (child_die
))
13936 /* Create the symbol in the DW_TAG_common_block block in the current
13938 sym
= new_symbol (child_die
, NULL
, cu
);
13941 struct attribute
*member_loc
;
13943 common_block
->contents
[common_block
->n_entries
++] = sym
;
13945 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13949 /* GDB has handled this for a long time, but it is
13950 not specified by DWARF. It seems to have been
13951 emitted by gfortran at least as recently as:
13952 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13953 complaint (&symfile_complaints
,
13954 _("Variable in common block has "
13955 "DW_AT_data_member_location "
13956 "- DIE at 0x%x [in module %s]"),
13957 child_die
->offset
.sect_off
,
13958 objfile_name (cu
->objfile
));
13960 if (attr_form_is_section_offset (member_loc
))
13961 dwarf2_complex_location_expr_complaint ();
13962 else if (attr_form_is_constant (member_loc
)
13963 || attr_form_is_block (member_loc
))
13966 mark_common_block_symbol_computed (sym
, die
, attr
,
13970 dwarf2_complex_location_expr_complaint ();
13975 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
13976 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
13980 /* Create a type for a C++ namespace. */
13982 static struct type
*
13983 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13985 struct objfile
*objfile
= cu
->objfile
;
13986 const char *previous_prefix
, *name
;
13990 /* For extensions, reuse the type of the original namespace. */
13991 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
13993 struct die_info
*ext_die
;
13994 struct dwarf2_cu
*ext_cu
= cu
;
13996 ext_die
= dwarf2_extension (die
, &ext_cu
);
13997 type
= read_type_die (ext_die
, ext_cu
);
13999 /* EXT_CU may not be the same as CU.
14000 Ensure TYPE is recorded with CU in die_type_hash. */
14001 return set_die_type (die
, type
, cu
);
14004 name
= namespace_name (die
, &is_anonymous
, cu
);
14006 /* Now build the name of the current namespace. */
14008 previous_prefix
= determine_prefix (die
, cu
);
14009 if (previous_prefix
[0] != '\0')
14010 name
= typename_concat (&objfile
->objfile_obstack
,
14011 previous_prefix
, name
, 0, cu
);
14013 /* Create the type. */
14014 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14016 TYPE_NAME (type
) = name
;
14017 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14019 return set_die_type (die
, type
, cu
);
14022 /* Read a C++ namespace. */
14025 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14027 struct objfile
*objfile
= cu
->objfile
;
14030 /* Add a symbol associated to this if we haven't seen the namespace
14031 before. Also, add a using directive if it's an anonymous
14034 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14038 type
= read_type_die (die
, cu
);
14039 new_symbol (die
, type
, cu
);
14041 namespace_name (die
, &is_anonymous
, cu
);
14044 const char *previous_prefix
= determine_prefix (die
, cu
);
14046 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
14047 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14051 if (die
->child
!= NULL
)
14053 struct die_info
*child_die
= die
->child
;
14055 while (child_die
&& child_die
->tag
)
14057 process_die (child_die
, cu
);
14058 child_die
= sibling_die (child_die
);
14063 /* Read a Fortran module as type. This DIE can be only a declaration used for
14064 imported module. Still we need that type as local Fortran "use ... only"
14065 declaration imports depend on the created type in determine_prefix. */
14067 static struct type
*
14068 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14070 struct objfile
*objfile
= cu
->objfile
;
14071 const char *module_name
;
14074 module_name
= dwarf2_name (die
, cu
);
14076 complaint (&symfile_complaints
,
14077 _("DW_TAG_module has no name, offset 0x%x"),
14078 die
->offset
.sect_off
);
14079 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14081 /* determine_prefix uses TYPE_TAG_NAME. */
14082 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14084 return set_die_type (die
, type
, cu
);
14087 /* Read a Fortran module. */
14090 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14092 struct die_info
*child_die
= die
->child
;
14095 type
= read_type_die (die
, cu
);
14096 new_symbol (die
, type
, cu
);
14098 while (child_die
&& child_die
->tag
)
14100 process_die (child_die
, cu
);
14101 child_die
= sibling_die (child_die
);
14105 /* Return the name of the namespace represented by DIE. Set
14106 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14109 static const char *
14110 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14112 struct die_info
*current_die
;
14113 const char *name
= NULL
;
14115 /* Loop through the extensions until we find a name. */
14117 for (current_die
= die
;
14118 current_die
!= NULL
;
14119 current_die
= dwarf2_extension (die
, &cu
))
14121 /* We don't use dwarf2_name here so that we can detect the absence
14122 of a name -> anonymous namespace. */
14123 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14126 name
= DW_STRING (attr
);
14131 /* Is it an anonymous namespace? */
14133 *is_anonymous
= (name
== NULL
);
14135 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14140 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14141 the user defined type vector. */
14143 static struct type
*
14144 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14146 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14147 struct comp_unit_head
*cu_header
= &cu
->header
;
14149 struct attribute
*attr_byte_size
;
14150 struct attribute
*attr_address_class
;
14151 int byte_size
, addr_class
;
14152 struct type
*target_type
;
14154 target_type
= die_type (die
, cu
);
14156 /* The die_type call above may have already set the type for this DIE. */
14157 type
= get_die_type (die
, cu
);
14161 type
= lookup_pointer_type (target_type
);
14163 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14164 if (attr_byte_size
)
14165 byte_size
= DW_UNSND (attr_byte_size
);
14167 byte_size
= cu_header
->addr_size
;
14169 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14170 if (attr_address_class
)
14171 addr_class
= DW_UNSND (attr_address_class
);
14173 addr_class
= DW_ADDR_none
;
14175 /* If the pointer size or address class is different than the
14176 default, create a type variant marked as such and set the
14177 length accordingly. */
14178 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14180 if (gdbarch_address_class_type_flags_p (gdbarch
))
14184 type_flags
= gdbarch_address_class_type_flags
14185 (gdbarch
, byte_size
, addr_class
);
14186 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14188 type
= make_type_with_address_space (type
, type_flags
);
14190 else if (TYPE_LENGTH (type
) != byte_size
)
14192 complaint (&symfile_complaints
,
14193 _("invalid pointer size %d"), byte_size
);
14197 /* Should we also complain about unhandled address classes? */
14201 TYPE_LENGTH (type
) = byte_size
;
14202 return set_die_type (die
, type
, cu
);
14205 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14206 the user defined type vector. */
14208 static struct type
*
14209 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14212 struct type
*to_type
;
14213 struct type
*domain
;
14215 to_type
= die_type (die
, cu
);
14216 domain
= die_containing_type (die
, cu
);
14218 /* The calls above may have already set the type for this DIE. */
14219 type
= get_die_type (die
, cu
);
14223 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14224 type
= lookup_methodptr_type (to_type
);
14225 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14227 struct type
*new_type
= alloc_type (cu
->objfile
);
14229 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14230 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14231 TYPE_VARARGS (to_type
));
14232 type
= lookup_methodptr_type (new_type
);
14235 type
= lookup_memberptr_type (to_type
, domain
);
14237 return set_die_type (die
, type
, cu
);
14240 /* Extract all information from a DW_TAG_reference_type DIE and add to
14241 the user defined type vector. */
14243 static struct type
*
14244 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14246 struct comp_unit_head
*cu_header
= &cu
->header
;
14247 struct type
*type
, *target_type
;
14248 struct attribute
*attr
;
14250 target_type
= die_type (die
, cu
);
14252 /* The die_type call above may have already set the type for this DIE. */
14253 type
= get_die_type (die
, cu
);
14257 type
= lookup_reference_type (target_type
);
14258 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14261 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14265 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14267 return set_die_type (die
, type
, cu
);
14270 /* Add the given cv-qualifiers to the element type of the array. GCC
14271 outputs DWARF type qualifiers that apply to an array, not the
14272 element type. But GDB relies on the array element type to carry
14273 the cv-qualifiers. This mimics section 6.7.3 of the C99
14276 static struct type
*
14277 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14278 struct type
*base_type
, int cnst
, int voltl
)
14280 struct type
*el_type
, *inner_array
;
14282 base_type
= copy_type (base_type
);
14283 inner_array
= base_type
;
14285 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14287 TYPE_TARGET_TYPE (inner_array
) =
14288 copy_type (TYPE_TARGET_TYPE (inner_array
));
14289 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14292 el_type
= TYPE_TARGET_TYPE (inner_array
);
14293 cnst
|= TYPE_CONST (el_type
);
14294 voltl
|= TYPE_VOLATILE (el_type
);
14295 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14297 return set_die_type (die
, base_type
, cu
);
14300 static struct type
*
14301 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14303 struct type
*base_type
, *cv_type
;
14305 base_type
= die_type (die
, cu
);
14307 /* The die_type call above may have already set the type for this DIE. */
14308 cv_type
= get_die_type (die
, cu
);
14312 /* In case the const qualifier is applied to an array type, the element type
14313 is so qualified, not the array type (section 6.7.3 of C99). */
14314 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14315 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14317 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14318 return set_die_type (die
, cv_type
, cu
);
14321 static struct type
*
14322 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14324 struct type
*base_type
, *cv_type
;
14326 base_type
= die_type (die
, cu
);
14328 /* The die_type call above may have already set the type for this DIE. */
14329 cv_type
= get_die_type (die
, cu
);
14333 /* In case the volatile qualifier is applied to an array type, the
14334 element type is so qualified, not the array type (section 6.7.3
14336 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14337 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14339 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14340 return set_die_type (die
, cv_type
, cu
);
14343 /* Handle DW_TAG_restrict_type. */
14345 static struct type
*
14346 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14348 struct type
*base_type
, *cv_type
;
14350 base_type
= die_type (die
, cu
);
14352 /* The die_type call above may have already set the type for this DIE. */
14353 cv_type
= get_die_type (die
, cu
);
14357 cv_type
= make_restrict_type (base_type
);
14358 return set_die_type (die
, cv_type
, cu
);
14361 /* Handle DW_TAG_atomic_type. */
14363 static struct type
*
14364 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14366 struct type
*base_type
, *cv_type
;
14368 base_type
= die_type (die
, cu
);
14370 /* The die_type call above may have already set the type for this DIE. */
14371 cv_type
= get_die_type (die
, cu
);
14375 cv_type
= make_atomic_type (base_type
);
14376 return set_die_type (die
, cv_type
, cu
);
14379 /* Extract all information from a DW_TAG_string_type DIE and add to
14380 the user defined type vector. It isn't really a user defined type,
14381 but it behaves like one, with other DIE's using an AT_user_def_type
14382 attribute to reference it. */
14384 static struct type
*
14385 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14387 struct objfile
*objfile
= cu
->objfile
;
14388 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14389 struct type
*type
, *range_type
, *index_type
, *char_type
;
14390 struct attribute
*attr
;
14391 unsigned int length
;
14393 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14396 length
= DW_UNSND (attr
);
14400 /* Check for the DW_AT_byte_size attribute. */
14401 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14404 length
= DW_UNSND (attr
);
14412 index_type
= objfile_type (objfile
)->builtin_int
;
14413 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14414 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14415 type
= create_string_type (NULL
, char_type
, range_type
);
14417 return set_die_type (die
, type
, cu
);
14420 /* Assuming that DIE corresponds to a function, returns nonzero
14421 if the function is prototyped. */
14424 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14426 struct attribute
*attr
;
14428 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14429 if (attr
&& (DW_UNSND (attr
) != 0))
14432 /* The DWARF standard implies that the DW_AT_prototyped attribute
14433 is only meaninful for C, but the concept also extends to other
14434 languages that allow unprototyped functions (Eg: Objective C).
14435 For all other languages, assume that functions are always
14437 if (cu
->language
!= language_c
14438 && cu
->language
!= language_objc
14439 && cu
->language
!= language_opencl
)
14442 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14443 prototyped and unprototyped functions; default to prototyped,
14444 since that is more common in modern code (and RealView warns
14445 about unprototyped functions). */
14446 if (producer_is_realview (cu
->producer
))
14452 /* Handle DIES due to C code like:
14456 int (*funcp)(int a, long l);
14460 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14462 static struct type
*
14463 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14465 struct objfile
*objfile
= cu
->objfile
;
14466 struct type
*type
; /* Type that this function returns. */
14467 struct type
*ftype
; /* Function that returns above type. */
14468 struct attribute
*attr
;
14470 type
= die_type (die
, cu
);
14472 /* The die_type call above may have already set the type for this DIE. */
14473 ftype
= get_die_type (die
, cu
);
14477 ftype
= lookup_function_type (type
);
14479 if (prototyped_function_p (die
, cu
))
14480 TYPE_PROTOTYPED (ftype
) = 1;
14482 /* Store the calling convention in the type if it's available in
14483 the subroutine die. Otherwise set the calling convention to
14484 the default value DW_CC_normal. */
14485 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14487 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14488 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14489 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14491 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14493 /* Record whether the function returns normally to its caller or not
14494 if the DWARF producer set that information. */
14495 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14496 if (attr
&& (DW_UNSND (attr
) != 0))
14497 TYPE_NO_RETURN (ftype
) = 1;
14499 /* We need to add the subroutine type to the die immediately so
14500 we don't infinitely recurse when dealing with parameters
14501 declared as the same subroutine type. */
14502 set_die_type (die
, ftype
, cu
);
14504 if (die
->child
!= NULL
)
14506 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14507 struct die_info
*child_die
;
14508 int nparams
, iparams
;
14510 /* Count the number of parameters.
14511 FIXME: GDB currently ignores vararg functions, but knows about
14512 vararg member functions. */
14514 child_die
= die
->child
;
14515 while (child_die
&& child_die
->tag
)
14517 if (child_die
->tag
== DW_TAG_formal_parameter
)
14519 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14520 TYPE_VARARGS (ftype
) = 1;
14521 child_die
= sibling_die (child_die
);
14524 /* Allocate storage for parameters and fill them in. */
14525 TYPE_NFIELDS (ftype
) = nparams
;
14526 TYPE_FIELDS (ftype
) = (struct field
*)
14527 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14529 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14530 even if we error out during the parameters reading below. */
14531 for (iparams
= 0; iparams
< nparams
; iparams
++)
14532 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14535 child_die
= die
->child
;
14536 while (child_die
&& child_die
->tag
)
14538 if (child_die
->tag
== DW_TAG_formal_parameter
)
14540 struct type
*arg_type
;
14542 /* DWARF version 2 has no clean way to discern C++
14543 static and non-static member functions. G++ helps
14544 GDB by marking the first parameter for non-static
14545 member functions (which is the this pointer) as
14546 artificial. We pass this information to
14547 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14549 DWARF version 3 added DW_AT_object_pointer, which GCC
14550 4.5 does not yet generate. */
14551 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14553 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14556 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14558 /* GCC/43521: In java, the formal parameter
14559 "this" is sometimes not marked with DW_AT_artificial. */
14560 if (cu
->language
== language_java
)
14562 const char *name
= dwarf2_name (child_die
, cu
);
14564 if (name
&& !strcmp (name
, "this"))
14565 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14568 arg_type
= die_type (child_die
, cu
);
14570 /* RealView does not mark THIS as const, which the testsuite
14571 expects. GCC marks THIS as const in method definitions,
14572 but not in the class specifications (GCC PR 43053). */
14573 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14574 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14577 struct dwarf2_cu
*arg_cu
= cu
;
14578 const char *name
= dwarf2_name (child_die
, cu
);
14580 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14583 /* If the compiler emits this, use it. */
14584 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14587 else if (name
&& strcmp (name
, "this") == 0)
14588 /* Function definitions will have the argument names. */
14590 else if (name
== NULL
&& iparams
== 0)
14591 /* Declarations may not have the names, so like
14592 elsewhere in GDB, assume an artificial first
14593 argument is "this". */
14597 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14601 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14604 child_die
= sibling_die (child_die
);
14611 static struct type
*
14612 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14614 struct objfile
*objfile
= cu
->objfile
;
14615 const char *name
= NULL
;
14616 struct type
*this_type
, *target_type
;
14618 name
= dwarf2_full_name (NULL
, die
, cu
);
14619 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14620 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14621 TYPE_NAME (this_type
) = name
;
14622 set_die_type (die
, this_type
, cu
);
14623 target_type
= die_type (die
, cu
);
14624 if (target_type
!= this_type
)
14625 TYPE_TARGET_TYPE (this_type
) = target_type
;
14628 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14629 spec and cause infinite loops in GDB. */
14630 complaint (&symfile_complaints
,
14631 _("Self-referential DW_TAG_typedef "
14632 "- DIE at 0x%x [in module %s]"),
14633 die
->offset
.sect_off
, objfile_name (objfile
));
14634 TYPE_TARGET_TYPE (this_type
) = NULL
;
14639 /* Find a representation of a given base type and install
14640 it in the TYPE field of the die. */
14642 static struct type
*
14643 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14645 struct objfile
*objfile
= cu
->objfile
;
14647 struct attribute
*attr
;
14648 int encoding
= 0, size
= 0;
14650 enum type_code code
= TYPE_CODE_INT
;
14651 int type_flags
= 0;
14652 struct type
*target_type
= NULL
;
14654 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14657 encoding
= DW_UNSND (attr
);
14659 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14662 size
= DW_UNSND (attr
);
14664 name
= dwarf2_name (die
, cu
);
14667 complaint (&symfile_complaints
,
14668 _("DW_AT_name missing from DW_TAG_base_type"));
14673 case DW_ATE_address
:
14674 /* Turn DW_ATE_address into a void * pointer. */
14675 code
= TYPE_CODE_PTR
;
14676 type_flags
|= TYPE_FLAG_UNSIGNED
;
14677 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14679 case DW_ATE_boolean
:
14680 code
= TYPE_CODE_BOOL
;
14681 type_flags
|= TYPE_FLAG_UNSIGNED
;
14683 case DW_ATE_complex_float
:
14684 code
= TYPE_CODE_COMPLEX
;
14685 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14687 case DW_ATE_decimal_float
:
14688 code
= TYPE_CODE_DECFLOAT
;
14691 code
= TYPE_CODE_FLT
;
14693 case DW_ATE_signed
:
14695 case DW_ATE_unsigned
:
14696 type_flags
|= TYPE_FLAG_UNSIGNED
;
14697 if (cu
->language
== language_fortran
14699 && startswith (name
, "character("))
14700 code
= TYPE_CODE_CHAR
;
14702 case DW_ATE_signed_char
:
14703 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14704 || cu
->language
== language_pascal
14705 || cu
->language
== language_fortran
)
14706 code
= TYPE_CODE_CHAR
;
14708 case DW_ATE_unsigned_char
:
14709 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14710 || cu
->language
== language_pascal
14711 || cu
->language
== language_fortran
)
14712 code
= TYPE_CODE_CHAR
;
14713 type_flags
|= TYPE_FLAG_UNSIGNED
;
14716 /* We just treat this as an integer and then recognize the
14717 type by name elsewhere. */
14721 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14722 dwarf_type_encoding_name (encoding
));
14726 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14727 TYPE_NAME (type
) = name
;
14728 TYPE_TARGET_TYPE (type
) = target_type
;
14730 if (name
&& strcmp (name
, "char") == 0)
14731 TYPE_NOSIGN (type
) = 1;
14733 return set_die_type (die
, type
, cu
);
14736 /* Parse dwarf attribute if it's a block, reference or constant and put the
14737 resulting value of the attribute into struct bound_prop.
14738 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14741 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14742 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14744 struct dwarf2_property_baton
*baton
;
14745 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14747 if (attr
== NULL
|| prop
== NULL
)
14750 if (attr_form_is_block (attr
))
14752 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14753 baton
->referenced_type
= NULL
;
14754 baton
->locexpr
.per_cu
= cu
->per_cu
;
14755 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14756 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14757 prop
->data
.baton
= baton
;
14758 prop
->kind
= PROP_LOCEXPR
;
14759 gdb_assert (prop
->data
.baton
!= NULL
);
14761 else if (attr_form_is_ref (attr
))
14763 struct dwarf2_cu
*target_cu
= cu
;
14764 struct die_info
*target_die
;
14765 struct attribute
*target_attr
;
14767 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14768 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14769 if (target_attr
== NULL
)
14770 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14772 if (target_attr
== NULL
)
14775 switch (target_attr
->name
)
14777 case DW_AT_location
:
14778 if (attr_form_is_section_offset (target_attr
))
14780 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14781 baton
->referenced_type
= die_type (target_die
, target_cu
);
14782 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14783 prop
->data
.baton
= baton
;
14784 prop
->kind
= PROP_LOCLIST
;
14785 gdb_assert (prop
->data
.baton
!= NULL
);
14787 else if (attr_form_is_block (target_attr
))
14789 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14790 baton
->referenced_type
= die_type (target_die
, target_cu
);
14791 baton
->locexpr
.per_cu
= cu
->per_cu
;
14792 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14793 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14794 prop
->data
.baton
= baton
;
14795 prop
->kind
= PROP_LOCEXPR
;
14796 gdb_assert (prop
->data
.baton
!= NULL
);
14800 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14801 "dynamic property");
14805 case DW_AT_data_member_location
:
14809 if (!handle_data_member_location (target_die
, target_cu
,
14813 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14814 baton
->referenced_type
= get_die_type (target_die
->parent
,
14816 baton
->offset_info
.offset
= offset
;
14817 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14818 prop
->data
.baton
= baton
;
14819 prop
->kind
= PROP_ADDR_OFFSET
;
14824 else if (attr_form_is_constant (attr
))
14826 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14827 prop
->kind
= PROP_CONST
;
14831 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14832 dwarf2_name (die
, cu
));
14839 /* Read the given DW_AT_subrange DIE. */
14841 static struct type
*
14842 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14844 struct type
*base_type
, *orig_base_type
;
14845 struct type
*range_type
;
14846 struct attribute
*attr
;
14847 struct dynamic_prop low
, high
;
14848 int low_default_is_valid
;
14849 int high_bound_is_count
= 0;
14851 LONGEST negative_mask
;
14853 orig_base_type
= die_type (die
, cu
);
14854 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14855 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14856 creating the range type, but we use the result of check_typedef
14857 when examining properties of the type. */
14858 base_type
= check_typedef (orig_base_type
);
14860 /* The die_type call above may have already set the type for this DIE. */
14861 range_type
= get_die_type (die
, cu
);
14865 low
.kind
= PROP_CONST
;
14866 high
.kind
= PROP_CONST
;
14867 high
.data
.const_val
= 0;
14869 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14870 omitting DW_AT_lower_bound. */
14871 switch (cu
->language
)
14874 case language_cplus
:
14875 low
.data
.const_val
= 0;
14876 low_default_is_valid
= 1;
14878 case language_fortran
:
14879 low
.data
.const_val
= 1;
14880 low_default_is_valid
= 1;
14883 case language_java
:
14884 case language_objc
:
14885 low
.data
.const_val
= 0;
14886 low_default_is_valid
= (cu
->header
.version
>= 4);
14890 case language_pascal
:
14891 low
.data
.const_val
= 1;
14892 low_default_is_valid
= (cu
->header
.version
>= 4);
14895 low
.data
.const_val
= 0;
14896 low_default_is_valid
= 0;
14900 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14902 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14903 else if (!low_default_is_valid
)
14904 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14905 "- DIE at 0x%x [in module %s]"),
14906 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14908 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14909 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14911 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14912 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14914 /* If bounds are constant do the final calculation here. */
14915 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14916 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14918 high_bound_is_count
= 1;
14922 /* Dwarf-2 specifications explicitly allows to create subrange types
14923 without specifying a base type.
14924 In that case, the base type must be set to the type of
14925 the lower bound, upper bound or count, in that order, if any of these
14926 three attributes references an object that has a type.
14927 If no base type is found, the Dwarf-2 specifications say that
14928 a signed integer type of size equal to the size of an address should
14930 For the following C code: `extern char gdb_int [];'
14931 GCC produces an empty range DIE.
14932 FIXME: muller/2010-05-28: Possible references to object for low bound,
14933 high bound or count are not yet handled by this code. */
14934 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14936 struct objfile
*objfile
= cu
->objfile
;
14937 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14938 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14939 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14941 /* Test "int", "long int", and "long long int" objfile types,
14942 and select the first one having a size above or equal to the
14943 architecture address size. */
14944 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14945 base_type
= int_type
;
14948 int_type
= objfile_type (objfile
)->builtin_long
;
14949 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14950 base_type
= int_type
;
14953 int_type
= objfile_type (objfile
)->builtin_long_long
;
14954 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14955 base_type
= int_type
;
14960 /* Normally, the DWARF producers are expected to use a signed
14961 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14962 But this is unfortunately not always the case, as witnessed
14963 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14964 is used instead. To work around that ambiguity, we treat
14965 the bounds as signed, and thus sign-extend their values, when
14966 the base type is signed. */
14968 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
14969 if (low
.kind
== PROP_CONST
14970 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
14971 low
.data
.const_val
|= negative_mask
;
14972 if (high
.kind
== PROP_CONST
14973 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
14974 high
.data
.const_val
|= negative_mask
;
14976 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
14978 if (high_bound_is_count
)
14979 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
14981 /* Ada expects an empty array on no boundary attributes. */
14982 if (attr
== NULL
&& cu
->language
!= language_ada
)
14983 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
14985 name
= dwarf2_name (die
, cu
);
14987 TYPE_NAME (range_type
) = name
;
14989 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14991 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
14993 set_die_type (die
, range_type
, cu
);
14995 /* set_die_type should be already done. */
14996 set_descriptive_type (range_type
, die
, cu
);
15001 static struct type
*
15002 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15006 /* For now, we only support the C meaning of an unspecified type: void. */
15008 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15009 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15011 return set_die_type (die
, type
, cu
);
15014 /* Read a single die and all its descendents. Set the die's sibling
15015 field to NULL; set other fields in the die correctly, and set all
15016 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15017 location of the info_ptr after reading all of those dies. PARENT
15018 is the parent of the die in question. */
15020 static struct die_info
*
15021 read_die_and_children (const struct die_reader_specs
*reader
,
15022 const gdb_byte
*info_ptr
,
15023 const gdb_byte
**new_info_ptr
,
15024 struct die_info
*parent
)
15026 struct die_info
*die
;
15027 const gdb_byte
*cur_ptr
;
15030 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15033 *new_info_ptr
= cur_ptr
;
15036 store_in_ref_table (die
, reader
->cu
);
15039 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15043 *new_info_ptr
= cur_ptr
;
15046 die
->sibling
= NULL
;
15047 die
->parent
= parent
;
15051 /* Read a die, all of its descendents, and all of its siblings; set
15052 all of the fields of all of the dies correctly. Arguments are as
15053 in read_die_and_children. */
15055 static struct die_info
*
15056 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15057 const gdb_byte
*info_ptr
,
15058 const gdb_byte
**new_info_ptr
,
15059 struct die_info
*parent
)
15061 struct die_info
*first_die
, *last_sibling
;
15062 const gdb_byte
*cur_ptr
;
15064 cur_ptr
= info_ptr
;
15065 first_die
= last_sibling
= NULL
;
15069 struct die_info
*die
15070 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15074 *new_info_ptr
= cur_ptr
;
15081 last_sibling
->sibling
= die
;
15083 last_sibling
= die
;
15087 /* Read a die, all of its descendents, and all of its siblings; set
15088 all of the fields of all of the dies correctly. Arguments are as
15089 in read_die_and_children.
15090 This the main entry point for reading a DIE and all its children. */
15092 static struct die_info
*
15093 read_die_and_siblings (const struct die_reader_specs
*reader
,
15094 const gdb_byte
*info_ptr
,
15095 const gdb_byte
**new_info_ptr
,
15096 struct die_info
*parent
)
15098 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15099 new_info_ptr
, parent
);
15101 if (dwarf2_die_debug
)
15103 fprintf_unfiltered (gdb_stdlog
,
15104 "Read die from %s@0x%x of %s:\n",
15105 get_section_name (reader
->die_section
),
15106 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15107 bfd_get_filename (reader
->abfd
));
15108 dump_die (die
, dwarf2_die_debug
);
15114 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15116 The caller is responsible for filling in the extra attributes
15117 and updating (*DIEP)->num_attrs.
15118 Set DIEP to point to a newly allocated die with its information,
15119 except for its child, sibling, and parent fields.
15120 Set HAS_CHILDREN to tell whether the die has children or not. */
15122 static const gdb_byte
*
15123 read_full_die_1 (const struct die_reader_specs
*reader
,
15124 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15125 int *has_children
, int num_extra_attrs
)
15127 unsigned int abbrev_number
, bytes_read
, i
;
15128 sect_offset offset
;
15129 struct abbrev_info
*abbrev
;
15130 struct die_info
*die
;
15131 struct dwarf2_cu
*cu
= reader
->cu
;
15132 bfd
*abfd
= reader
->abfd
;
15134 offset
.sect_off
= info_ptr
- reader
->buffer
;
15135 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15136 info_ptr
+= bytes_read
;
15137 if (!abbrev_number
)
15144 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15146 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15148 bfd_get_filename (abfd
));
15150 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15151 die
->offset
= offset
;
15152 die
->tag
= abbrev
->tag
;
15153 die
->abbrev
= abbrev_number
;
15155 /* Make the result usable.
15156 The caller needs to update num_attrs after adding the extra
15158 die
->num_attrs
= abbrev
->num_attrs
;
15160 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15161 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15165 *has_children
= abbrev
->has_children
;
15169 /* Read a die and all its attributes.
15170 Set DIEP to point to a newly allocated die with its information,
15171 except for its child, sibling, and parent fields.
15172 Set HAS_CHILDREN to tell whether the die has children or not. */
15174 static const gdb_byte
*
15175 read_full_die (const struct die_reader_specs
*reader
,
15176 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15179 const gdb_byte
*result
;
15181 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15183 if (dwarf2_die_debug
)
15185 fprintf_unfiltered (gdb_stdlog
,
15186 "Read die from %s@0x%x of %s:\n",
15187 get_section_name (reader
->die_section
),
15188 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15189 bfd_get_filename (reader
->abfd
));
15190 dump_die (*diep
, dwarf2_die_debug
);
15196 /* Abbreviation tables.
15198 In DWARF version 2, the description of the debugging information is
15199 stored in a separate .debug_abbrev section. Before we read any
15200 dies from a section we read in all abbreviations and install them
15201 in a hash table. */
15203 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15205 static struct abbrev_info
*
15206 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15208 struct abbrev_info
*abbrev
;
15210 abbrev
= (struct abbrev_info
*)
15211 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15212 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15216 /* Add an abbreviation to the table. */
15219 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15220 unsigned int abbrev_number
,
15221 struct abbrev_info
*abbrev
)
15223 unsigned int hash_number
;
15225 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15226 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15227 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15230 /* Look up an abbrev in the table.
15231 Returns NULL if the abbrev is not found. */
15233 static struct abbrev_info
*
15234 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15235 unsigned int abbrev_number
)
15237 unsigned int hash_number
;
15238 struct abbrev_info
*abbrev
;
15240 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15241 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15245 if (abbrev
->number
== abbrev_number
)
15247 abbrev
= abbrev
->next
;
15252 /* Read in an abbrev table. */
15254 static struct abbrev_table
*
15255 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15256 sect_offset offset
)
15258 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15259 bfd
*abfd
= get_section_bfd_owner (section
);
15260 struct abbrev_table
*abbrev_table
;
15261 const gdb_byte
*abbrev_ptr
;
15262 struct abbrev_info
*cur_abbrev
;
15263 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15264 unsigned int abbrev_form
;
15265 struct attr_abbrev
*cur_attrs
;
15266 unsigned int allocated_attrs
;
15268 abbrev_table
= XNEW (struct abbrev_table
);
15269 abbrev_table
->offset
= offset
;
15270 obstack_init (&abbrev_table
->abbrev_obstack
);
15271 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15273 * sizeof (struct abbrev_info
*)));
15274 memset (abbrev_table
->abbrevs
, 0,
15275 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15277 dwarf2_read_section (objfile
, section
);
15278 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15279 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15280 abbrev_ptr
+= bytes_read
;
15282 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15283 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15285 /* Loop until we reach an abbrev number of 0. */
15286 while (abbrev_number
)
15288 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15290 /* read in abbrev header */
15291 cur_abbrev
->number
= abbrev_number
;
15292 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15293 abbrev_ptr
+= bytes_read
;
15294 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15297 /* now read in declarations */
15298 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15299 abbrev_ptr
+= bytes_read
;
15300 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15301 abbrev_ptr
+= bytes_read
;
15302 while (abbrev_name
)
15304 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15306 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15308 = xrealloc (cur_attrs
, (allocated_attrs
15309 * sizeof (struct attr_abbrev
)));
15312 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
15313 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
15314 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15315 abbrev_ptr
+= bytes_read
;
15316 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15317 abbrev_ptr
+= bytes_read
;
15320 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15321 (cur_abbrev
->num_attrs
15322 * sizeof (struct attr_abbrev
)));
15323 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15324 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15326 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15328 /* Get next abbreviation.
15329 Under Irix6 the abbreviations for a compilation unit are not
15330 always properly terminated with an abbrev number of 0.
15331 Exit loop if we encounter an abbreviation which we have
15332 already read (which means we are about to read the abbreviations
15333 for the next compile unit) or if the end of the abbreviation
15334 table is reached. */
15335 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15337 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15338 abbrev_ptr
+= bytes_read
;
15339 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15344 return abbrev_table
;
15347 /* Free the resources held by ABBREV_TABLE. */
15350 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15352 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15353 xfree (abbrev_table
);
15356 /* Same as abbrev_table_free but as a cleanup.
15357 We pass in a pointer to the pointer to the table so that we can
15358 set the pointer to NULL when we're done. It also simplifies
15359 build_type_psymtabs_1. */
15362 abbrev_table_free_cleanup (void *table_ptr
)
15364 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15366 if (*abbrev_table_ptr
!= NULL
)
15367 abbrev_table_free (*abbrev_table_ptr
);
15368 *abbrev_table_ptr
= NULL
;
15371 /* Read the abbrev table for CU from ABBREV_SECTION. */
15374 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15375 struct dwarf2_section_info
*abbrev_section
)
15378 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15381 /* Release the memory used by the abbrev table for a compilation unit. */
15384 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15386 struct dwarf2_cu
*cu
= ptr_to_cu
;
15388 if (cu
->abbrev_table
!= NULL
)
15389 abbrev_table_free (cu
->abbrev_table
);
15390 /* Set this to NULL so that we SEGV if we try to read it later,
15391 and also because free_comp_unit verifies this is NULL. */
15392 cu
->abbrev_table
= NULL
;
15395 /* Returns nonzero if TAG represents a type that we might generate a partial
15399 is_type_tag_for_partial (int tag
)
15404 /* Some types that would be reasonable to generate partial symbols for,
15405 that we don't at present. */
15406 case DW_TAG_array_type
:
15407 case DW_TAG_file_type
:
15408 case DW_TAG_ptr_to_member_type
:
15409 case DW_TAG_set_type
:
15410 case DW_TAG_string_type
:
15411 case DW_TAG_subroutine_type
:
15413 case DW_TAG_base_type
:
15414 case DW_TAG_class_type
:
15415 case DW_TAG_interface_type
:
15416 case DW_TAG_enumeration_type
:
15417 case DW_TAG_structure_type
:
15418 case DW_TAG_subrange_type
:
15419 case DW_TAG_typedef
:
15420 case DW_TAG_union_type
:
15427 /* Load all DIEs that are interesting for partial symbols into memory. */
15429 static struct partial_die_info
*
15430 load_partial_dies (const struct die_reader_specs
*reader
,
15431 const gdb_byte
*info_ptr
, int building_psymtab
)
15433 struct dwarf2_cu
*cu
= reader
->cu
;
15434 struct objfile
*objfile
= cu
->objfile
;
15435 struct partial_die_info
*part_die
;
15436 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15437 struct abbrev_info
*abbrev
;
15438 unsigned int bytes_read
;
15439 unsigned int load_all
= 0;
15440 int nesting_level
= 1;
15445 gdb_assert (cu
->per_cu
!= NULL
);
15446 if (cu
->per_cu
->load_all_dies
)
15450 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15454 &cu
->comp_unit_obstack
,
15455 hashtab_obstack_allocate
,
15456 dummy_obstack_deallocate
);
15458 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15459 sizeof (struct partial_die_info
));
15463 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15465 /* A NULL abbrev means the end of a series of children. */
15466 if (abbrev
== NULL
)
15468 if (--nesting_level
== 0)
15470 /* PART_DIE was probably the last thing allocated on the
15471 comp_unit_obstack, so we could call obstack_free
15472 here. We don't do that because the waste is small,
15473 and will be cleaned up when we're done with this
15474 compilation unit. This way, we're also more robust
15475 against other users of the comp_unit_obstack. */
15478 info_ptr
+= bytes_read
;
15479 last_die
= parent_die
;
15480 parent_die
= parent_die
->die_parent
;
15484 /* Check for template arguments. We never save these; if
15485 they're seen, we just mark the parent, and go on our way. */
15486 if (parent_die
!= NULL
15487 && cu
->language
== language_cplus
15488 && (abbrev
->tag
== DW_TAG_template_type_param
15489 || abbrev
->tag
== DW_TAG_template_value_param
))
15491 parent_die
->has_template_arguments
= 1;
15495 /* We don't need a partial DIE for the template argument. */
15496 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15501 /* We only recurse into c++ subprograms looking for template arguments.
15502 Skip their other children. */
15504 && cu
->language
== language_cplus
15505 && parent_die
!= NULL
15506 && parent_die
->tag
== DW_TAG_subprogram
)
15508 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15512 /* Check whether this DIE is interesting enough to save. Normally
15513 we would not be interested in members here, but there may be
15514 later variables referencing them via DW_AT_specification (for
15515 static members). */
15517 && !is_type_tag_for_partial (abbrev
->tag
)
15518 && abbrev
->tag
!= DW_TAG_constant
15519 && abbrev
->tag
!= DW_TAG_enumerator
15520 && abbrev
->tag
!= DW_TAG_subprogram
15521 && abbrev
->tag
!= DW_TAG_lexical_block
15522 && abbrev
->tag
!= DW_TAG_variable
15523 && abbrev
->tag
!= DW_TAG_namespace
15524 && abbrev
->tag
!= DW_TAG_module
15525 && abbrev
->tag
!= DW_TAG_member
15526 && abbrev
->tag
!= DW_TAG_imported_unit
15527 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15529 /* Otherwise we skip to the next sibling, if any. */
15530 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15534 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15537 /* This two-pass algorithm for processing partial symbols has a
15538 high cost in cache pressure. Thus, handle some simple cases
15539 here which cover the majority of C partial symbols. DIEs
15540 which neither have specification tags in them, nor could have
15541 specification tags elsewhere pointing at them, can simply be
15542 processed and discarded.
15544 This segment is also optional; scan_partial_symbols and
15545 add_partial_symbol will handle these DIEs if we chain
15546 them in normally. When compilers which do not emit large
15547 quantities of duplicate debug information are more common,
15548 this code can probably be removed. */
15550 /* Any complete simple types at the top level (pretty much all
15551 of them, for a language without namespaces), can be processed
15553 if (parent_die
== NULL
15554 && part_die
->has_specification
== 0
15555 && part_die
->is_declaration
== 0
15556 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15557 || part_die
->tag
== DW_TAG_base_type
15558 || part_die
->tag
== DW_TAG_subrange_type
))
15560 if (building_psymtab
&& part_die
->name
!= NULL
)
15561 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15562 VAR_DOMAIN
, LOC_TYPEDEF
,
15563 &objfile
->static_psymbols
,
15564 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15565 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15569 /* The exception for DW_TAG_typedef with has_children above is
15570 a workaround of GCC PR debug/47510. In the case of this complaint
15571 type_name_no_tag_or_error will error on such types later.
15573 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15574 it could not find the child DIEs referenced later, this is checked
15575 above. In correct DWARF DW_TAG_typedef should have no children. */
15577 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15578 complaint (&symfile_complaints
,
15579 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15580 "- DIE at 0x%x [in module %s]"),
15581 part_die
->offset
.sect_off
, objfile_name (objfile
));
15583 /* If we're at the second level, and we're an enumerator, and
15584 our parent has no specification (meaning possibly lives in a
15585 namespace elsewhere), then we can add the partial symbol now
15586 instead of queueing it. */
15587 if (part_die
->tag
== DW_TAG_enumerator
15588 && parent_die
!= NULL
15589 && parent_die
->die_parent
== NULL
15590 && parent_die
->tag
== DW_TAG_enumeration_type
15591 && parent_die
->has_specification
== 0)
15593 if (part_die
->name
== NULL
)
15594 complaint (&symfile_complaints
,
15595 _("malformed enumerator DIE ignored"));
15596 else if (building_psymtab
)
15597 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15598 VAR_DOMAIN
, LOC_CONST
,
15599 (cu
->language
== language_cplus
15600 || cu
->language
== language_java
)
15601 ? &objfile
->global_psymbols
15602 : &objfile
->static_psymbols
,
15603 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15605 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15609 /* We'll save this DIE so link it in. */
15610 part_die
->die_parent
= parent_die
;
15611 part_die
->die_sibling
= NULL
;
15612 part_die
->die_child
= NULL
;
15614 if (last_die
&& last_die
== parent_die
)
15615 last_die
->die_child
= part_die
;
15617 last_die
->die_sibling
= part_die
;
15619 last_die
= part_die
;
15621 if (first_die
== NULL
)
15622 first_die
= part_die
;
15624 /* Maybe add the DIE to the hash table. Not all DIEs that we
15625 find interesting need to be in the hash table, because we
15626 also have the parent/sibling/child chains; only those that we
15627 might refer to by offset later during partial symbol reading.
15629 For now this means things that might have be the target of a
15630 DW_AT_specification, DW_AT_abstract_origin, or
15631 DW_AT_extension. DW_AT_extension will refer only to
15632 namespaces; DW_AT_abstract_origin refers to functions (and
15633 many things under the function DIE, but we do not recurse
15634 into function DIEs during partial symbol reading) and
15635 possibly variables as well; DW_AT_specification refers to
15636 declarations. Declarations ought to have the DW_AT_declaration
15637 flag. It happens that GCC forgets to put it in sometimes, but
15638 only for functions, not for types.
15640 Adding more things than necessary to the hash table is harmless
15641 except for the performance cost. Adding too few will result in
15642 wasted time in find_partial_die, when we reread the compilation
15643 unit with load_all_dies set. */
15646 || abbrev
->tag
== DW_TAG_constant
15647 || abbrev
->tag
== DW_TAG_subprogram
15648 || abbrev
->tag
== DW_TAG_variable
15649 || abbrev
->tag
== DW_TAG_namespace
15650 || part_die
->is_declaration
)
15654 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15655 part_die
->offset
.sect_off
, INSERT
);
15659 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15660 sizeof (struct partial_die_info
));
15662 /* For some DIEs we want to follow their children (if any). For C
15663 we have no reason to follow the children of structures; for other
15664 languages we have to, so that we can get at method physnames
15665 to infer fully qualified class names, for DW_AT_specification,
15666 and for C++ template arguments. For C++, we also look one level
15667 inside functions to find template arguments (if the name of the
15668 function does not already contain the template arguments).
15670 For Ada, we need to scan the children of subprograms and lexical
15671 blocks as well because Ada allows the definition of nested
15672 entities that could be interesting for the debugger, such as
15673 nested subprograms for instance. */
15674 if (last_die
->has_children
15676 || last_die
->tag
== DW_TAG_namespace
15677 || last_die
->tag
== DW_TAG_module
15678 || last_die
->tag
== DW_TAG_enumeration_type
15679 || (cu
->language
== language_cplus
15680 && last_die
->tag
== DW_TAG_subprogram
15681 && (last_die
->name
== NULL
15682 || strchr (last_die
->name
, '<') == NULL
))
15683 || (cu
->language
!= language_c
15684 && (last_die
->tag
== DW_TAG_class_type
15685 || last_die
->tag
== DW_TAG_interface_type
15686 || last_die
->tag
== DW_TAG_structure_type
15687 || last_die
->tag
== DW_TAG_union_type
))
15688 || (cu
->language
== language_ada
15689 && (last_die
->tag
== DW_TAG_subprogram
15690 || last_die
->tag
== DW_TAG_lexical_block
))))
15693 parent_die
= last_die
;
15697 /* Otherwise we skip to the next sibling, if any. */
15698 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15700 /* Back to the top, do it again. */
15704 /* Read a minimal amount of information into the minimal die structure. */
15706 static const gdb_byte
*
15707 read_partial_die (const struct die_reader_specs
*reader
,
15708 struct partial_die_info
*part_die
,
15709 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15710 const gdb_byte
*info_ptr
)
15712 struct dwarf2_cu
*cu
= reader
->cu
;
15713 struct objfile
*objfile
= cu
->objfile
;
15714 const gdb_byte
*buffer
= reader
->buffer
;
15716 struct attribute attr
;
15717 int has_low_pc_attr
= 0;
15718 int has_high_pc_attr
= 0;
15719 int high_pc_relative
= 0;
15721 memset (part_die
, 0, sizeof (struct partial_die_info
));
15723 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15725 info_ptr
+= abbrev_len
;
15727 if (abbrev
== NULL
)
15730 part_die
->tag
= abbrev
->tag
;
15731 part_die
->has_children
= abbrev
->has_children
;
15733 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15735 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15737 /* Store the data if it is of an attribute we want to keep in a
15738 partial symbol table. */
15742 switch (part_die
->tag
)
15744 case DW_TAG_compile_unit
:
15745 case DW_TAG_partial_unit
:
15746 case DW_TAG_type_unit
:
15747 /* Compilation units have a DW_AT_name that is a filename, not
15748 a source language identifier. */
15749 case DW_TAG_enumeration_type
:
15750 case DW_TAG_enumerator
:
15751 /* These tags always have simple identifiers already; no need
15752 to canonicalize them. */
15753 part_die
->name
= DW_STRING (&attr
);
15757 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15758 &objfile
->per_bfd
->storage_obstack
);
15762 case DW_AT_linkage_name
:
15763 case DW_AT_MIPS_linkage_name
:
15764 /* Note that both forms of linkage name might appear. We
15765 assume they will be the same, and we only store the last
15767 if (cu
->language
== language_ada
)
15768 part_die
->name
= DW_STRING (&attr
);
15769 part_die
->linkage_name
= DW_STRING (&attr
);
15772 has_low_pc_attr
= 1;
15773 part_die
->lowpc
= attr_value_as_address (&attr
);
15775 case DW_AT_high_pc
:
15776 has_high_pc_attr
= 1;
15777 part_die
->highpc
= attr_value_as_address (&attr
);
15778 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15779 high_pc_relative
= 1;
15781 case DW_AT_location
:
15782 /* Support the .debug_loc offsets. */
15783 if (attr_form_is_block (&attr
))
15785 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15787 else if (attr_form_is_section_offset (&attr
))
15789 dwarf2_complex_location_expr_complaint ();
15793 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15794 "partial symbol information");
15797 case DW_AT_external
:
15798 part_die
->is_external
= DW_UNSND (&attr
);
15800 case DW_AT_declaration
:
15801 part_die
->is_declaration
= DW_UNSND (&attr
);
15804 part_die
->has_type
= 1;
15806 case DW_AT_abstract_origin
:
15807 case DW_AT_specification
:
15808 case DW_AT_extension
:
15809 part_die
->has_specification
= 1;
15810 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15811 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15812 || cu
->per_cu
->is_dwz
);
15814 case DW_AT_sibling
:
15815 /* Ignore absolute siblings, they might point outside of
15816 the current compile unit. */
15817 if (attr
.form
== DW_FORM_ref_addr
)
15818 complaint (&symfile_complaints
,
15819 _("ignoring absolute DW_AT_sibling"));
15822 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15823 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15825 if (sibling_ptr
< info_ptr
)
15826 complaint (&symfile_complaints
,
15827 _("DW_AT_sibling points backwards"));
15828 else if (sibling_ptr
> reader
->buffer_end
)
15829 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15831 part_die
->sibling
= sibling_ptr
;
15834 case DW_AT_byte_size
:
15835 part_die
->has_byte_size
= 1;
15837 case DW_AT_calling_convention
:
15838 /* DWARF doesn't provide a way to identify a program's source-level
15839 entry point. DW_AT_calling_convention attributes are only meant
15840 to describe functions' calling conventions.
15842 However, because it's a necessary piece of information in
15843 Fortran, and because DW_CC_program is the only piece of debugging
15844 information whose definition refers to a 'main program' at all,
15845 several compilers have begun marking Fortran main programs with
15846 DW_CC_program --- even when those functions use the standard
15847 calling conventions.
15849 So until DWARF specifies a way to provide this information and
15850 compilers pick up the new representation, we'll support this
15852 if (DW_UNSND (&attr
) == DW_CC_program
15853 && cu
->language
== language_fortran
)
15854 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15857 if (DW_UNSND (&attr
) == DW_INL_inlined
15858 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15859 part_die
->may_be_inlined
= 1;
15863 if (part_die
->tag
== DW_TAG_imported_unit
)
15865 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15866 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15867 || cu
->per_cu
->is_dwz
);
15876 if (high_pc_relative
)
15877 part_die
->highpc
+= part_die
->lowpc
;
15879 if (has_low_pc_attr
&& has_high_pc_attr
)
15881 /* When using the GNU linker, .gnu.linkonce. sections are used to
15882 eliminate duplicate copies of functions and vtables and such.
15883 The linker will arbitrarily choose one and discard the others.
15884 The AT_*_pc values for such functions refer to local labels in
15885 these sections. If the section from that file was discarded, the
15886 labels are not in the output, so the relocs get a value of 0.
15887 If this is a discarded function, mark the pc bounds as invalid,
15888 so that GDB will ignore it. */
15889 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15891 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15893 complaint (&symfile_complaints
,
15894 _("DW_AT_low_pc %s is zero "
15895 "for DIE at 0x%x [in module %s]"),
15896 paddress (gdbarch
, part_die
->lowpc
),
15897 part_die
->offset
.sect_off
, objfile_name (objfile
));
15899 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15900 else if (part_die
->lowpc
>= part_die
->highpc
)
15902 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15904 complaint (&symfile_complaints
,
15905 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15906 "for DIE at 0x%x [in module %s]"),
15907 paddress (gdbarch
, part_die
->lowpc
),
15908 paddress (gdbarch
, part_die
->highpc
),
15909 part_die
->offset
.sect_off
, objfile_name (objfile
));
15912 part_die
->has_pc_info
= 1;
15918 /* Find a cached partial DIE at OFFSET in CU. */
15920 static struct partial_die_info
*
15921 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15923 struct partial_die_info
*lookup_die
= NULL
;
15924 struct partial_die_info part_die
;
15926 part_die
.offset
= offset
;
15927 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15933 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15934 except in the case of .debug_types DIEs which do not reference
15935 outside their CU (they do however referencing other types via
15936 DW_FORM_ref_sig8). */
15938 static struct partial_die_info
*
15939 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15941 struct objfile
*objfile
= cu
->objfile
;
15942 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15943 struct partial_die_info
*pd
= NULL
;
15945 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15946 && offset_in_cu_p (&cu
->header
, offset
))
15948 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15951 /* We missed recording what we needed.
15952 Load all dies and try again. */
15953 per_cu
= cu
->per_cu
;
15957 /* TUs don't reference other CUs/TUs (except via type signatures). */
15958 if (cu
->per_cu
->is_debug_types
)
15960 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15961 " external reference to offset 0x%lx [in module %s].\n"),
15962 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
15963 bfd_get_filename (objfile
->obfd
));
15965 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
15968 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
15969 load_partial_comp_unit (per_cu
);
15971 per_cu
->cu
->last_used
= 0;
15972 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15975 /* If we didn't find it, and not all dies have been loaded,
15976 load them all and try again. */
15978 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
15980 per_cu
->load_all_dies
= 1;
15982 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15983 THIS_CU->cu may already be in use. So we can't just free it and
15984 replace its DIEs with the ones we read in. Instead, we leave those
15985 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15986 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15988 load_partial_comp_unit (per_cu
);
15990 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15994 internal_error (__FILE__
, __LINE__
,
15995 _("could not find partial DIE 0x%x "
15996 "in cache [from module %s]\n"),
15997 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16001 /* See if we can figure out if the class lives in a namespace. We do
16002 this by looking for a member function; its demangled name will
16003 contain namespace info, if there is any. */
16006 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16007 struct dwarf2_cu
*cu
)
16009 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16010 what template types look like, because the demangler
16011 frequently doesn't give the same name as the debug info. We
16012 could fix this by only using the demangled name to get the
16013 prefix (but see comment in read_structure_type). */
16015 struct partial_die_info
*real_pdi
;
16016 struct partial_die_info
*child_pdi
;
16018 /* If this DIE (this DIE's specification, if any) has a parent, then
16019 we should not do this. We'll prepend the parent's fully qualified
16020 name when we create the partial symbol. */
16022 real_pdi
= struct_pdi
;
16023 while (real_pdi
->has_specification
)
16024 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16025 real_pdi
->spec_is_dwz
, cu
);
16027 if (real_pdi
->die_parent
!= NULL
)
16030 for (child_pdi
= struct_pdi
->die_child
;
16032 child_pdi
= child_pdi
->die_sibling
)
16034 if (child_pdi
->tag
== DW_TAG_subprogram
16035 && child_pdi
->linkage_name
!= NULL
)
16037 char *actual_class_name
16038 = language_class_name_from_physname (cu
->language_defn
,
16039 child_pdi
->linkage_name
);
16040 if (actual_class_name
!= NULL
)
16043 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16045 strlen (actual_class_name
));
16046 xfree (actual_class_name
);
16053 /* Adjust PART_DIE before generating a symbol for it. This function
16054 may set the is_external flag or change the DIE's name. */
16057 fixup_partial_die (struct partial_die_info
*part_die
,
16058 struct dwarf2_cu
*cu
)
16060 /* Once we've fixed up a die, there's no point in doing so again.
16061 This also avoids a memory leak if we were to call
16062 guess_partial_die_structure_name multiple times. */
16063 if (part_die
->fixup_called
)
16066 /* If we found a reference attribute and the DIE has no name, try
16067 to find a name in the referred to DIE. */
16069 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16071 struct partial_die_info
*spec_die
;
16073 spec_die
= find_partial_die (part_die
->spec_offset
,
16074 part_die
->spec_is_dwz
, cu
);
16076 fixup_partial_die (spec_die
, cu
);
16078 if (spec_die
->name
)
16080 part_die
->name
= spec_die
->name
;
16082 /* Copy DW_AT_external attribute if it is set. */
16083 if (spec_die
->is_external
)
16084 part_die
->is_external
= spec_die
->is_external
;
16088 /* Set default names for some unnamed DIEs. */
16090 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16091 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16093 /* If there is no parent die to provide a namespace, and there are
16094 children, see if we can determine the namespace from their linkage
16096 if (cu
->language
== language_cplus
16097 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16098 && part_die
->die_parent
== NULL
16099 && part_die
->has_children
16100 && (part_die
->tag
== DW_TAG_class_type
16101 || part_die
->tag
== DW_TAG_structure_type
16102 || part_die
->tag
== DW_TAG_union_type
))
16103 guess_partial_die_structure_name (part_die
, cu
);
16105 /* GCC might emit a nameless struct or union that has a linkage
16106 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16107 if (part_die
->name
== NULL
16108 && (part_die
->tag
== DW_TAG_class_type
16109 || part_die
->tag
== DW_TAG_interface_type
16110 || part_die
->tag
== DW_TAG_structure_type
16111 || part_die
->tag
== DW_TAG_union_type
)
16112 && part_die
->linkage_name
!= NULL
)
16116 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16121 /* Strip any leading namespaces/classes, keep only the base name.
16122 DW_AT_name for named DIEs does not contain the prefixes. */
16123 base
= strrchr (demangled
, ':');
16124 if (base
&& base
> demangled
&& base
[-1] == ':')
16130 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16131 base
, strlen (base
));
16136 part_die
->fixup_called
= 1;
16139 /* Read an attribute value described by an attribute form. */
16141 static const gdb_byte
*
16142 read_attribute_value (const struct die_reader_specs
*reader
,
16143 struct attribute
*attr
, unsigned form
,
16144 const gdb_byte
*info_ptr
)
16146 struct dwarf2_cu
*cu
= reader
->cu
;
16147 struct objfile
*objfile
= cu
->objfile
;
16148 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16149 bfd
*abfd
= reader
->abfd
;
16150 struct comp_unit_head
*cu_header
= &cu
->header
;
16151 unsigned int bytes_read
;
16152 struct dwarf_block
*blk
;
16157 case DW_FORM_ref_addr
:
16158 if (cu
->header
.version
== 2)
16159 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16161 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16162 &cu
->header
, &bytes_read
);
16163 info_ptr
+= bytes_read
;
16165 case DW_FORM_GNU_ref_alt
:
16166 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16167 info_ptr
+= bytes_read
;
16170 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16171 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16172 info_ptr
+= bytes_read
;
16174 case DW_FORM_block2
:
16175 blk
= dwarf_alloc_block (cu
);
16176 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16178 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16179 info_ptr
+= blk
->size
;
16180 DW_BLOCK (attr
) = blk
;
16182 case DW_FORM_block4
:
16183 blk
= dwarf_alloc_block (cu
);
16184 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16186 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16187 info_ptr
+= blk
->size
;
16188 DW_BLOCK (attr
) = blk
;
16190 case DW_FORM_data2
:
16191 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16194 case DW_FORM_data4
:
16195 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16198 case DW_FORM_data8
:
16199 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16202 case DW_FORM_sec_offset
:
16203 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16204 info_ptr
+= bytes_read
;
16206 case DW_FORM_string
:
16207 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16208 DW_STRING_IS_CANONICAL (attr
) = 0;
16209 info_ptr
+= bytes_read
;
16212 if (!cu
->per_cu
->is_dwz
)
16214 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16216 DW_STRING_IS_CANONICAL (attr
) = 0;
16217 info_ptr
+= bytes_read
;
16221 case DW_FORM_GNU_strp_alt
:
16223 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16224 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16227 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16228 DW_STRING_IS_CANONICAL (attr
) = 0;
16229 info_ptr
+= bytes_read
;
16232 case DW_FORM_exprloc
:
16233 case DW_FORM_block
:
16234 blk
= dwarf_alloc_block (cu
);
16235 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16236 info_ptr
+= bytes_read
;
16237 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16238 info_ptr
+= blk
->size
;
16239 DW_BLOCK (attr
) = blk
;
16241 case DW_FORM_block1
:
16242 blk
= dwarf_alloc_block (cu
);
16243 blk
->size
= read_1_byte (abfd
, info_ptr
);
16245 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16246 info_ptr
+= blk
->size
;
16247 DW_BLOCK (attr
) = blk
;
16249 case DW_FORM_data1
:
16250 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16254 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16257 case DW_FORM_flag_present
:
16258 DW_UNSND (attr
) = 1;
16260 case DW_FORM_sdata
:
16261 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16262 info_ptr
+= bytes_read
;
16264 case DW_FORM_udata
:
16265 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16266 info_ptr
+= bytes_read
;
16269 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16270 + read_1_byte (abfd
, info_ptr
));
16274 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16275 + read_2_bytes (abfd
, info_ptr
));
16279 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16280 + read_4_bytes (abfd
, info_ptr
));
16284 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16285 + read_8_bytes (abfd
, info_ptr
));
16288 case DW_FORM_ref_sig8
:
16289 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16292 case DW_FORM_ref_udata
:
16293 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16294 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16295 info_ptr
+= bytes_read
;
16297 case DW_FORM_indirect
:
16298 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16299 info_ptr
+= bytes_read
;
16300 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16302 case DW_FORM_GNU_addr_index
:
16303 if (reader
->dwo_file
== NULL
)
16305 /* For now flag a hard error.
16306 Later we can turn this into a complaint. */
16307 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16308 dwarf_form_name (form
),
16309 bfd_get_filename (abfd
));
16311 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16312 info_ptr
+= bytes_read
;
16314 case DW_FORM_GNU_str_index
:
16315 if (reader
->dwo_file
== NULL
)
16317 /* For now flag a hard error.
16318 Later we can turn this into a complaint if warranted. */
16319 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16320 dwarf_form_name (form
),
16321 bfd_get_filename (abfd
));
16324 ULONGEST str_index
=
16325 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16327 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16328 DW_STRING_IS_CANONICAL (attr
) = 0;
16329 info_ptr
+= bytes_read
;
16333 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16334 dwarf_form_name (form
),
16335 bfd_get_filename (abfd
));
16339 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16340 attr
->form
= DW_FORM_GNU_ref_alt
;
16342 /* We have seen instances where the compiler tried to emit a byte
16343 size attribute of -1 which ended up being encoded as an unsigned
16344 0xffffffff. Although 0xffffffff is technically a valid size value,
16345 an object of this size seems pretty unlikely so we can relatively
16346 safely treat these cases as if the size attribute was invalid and
16347 treat them as zero by default. */
16348 if (attr
->name
== DW_AT_byte_size
16349 && form
== DW_FORM_data4
16350 && DW_UNSND (attr
) >= 0xffffffff)
16353 (&symfile_complaints
,
16354 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16355 hex_string (DW_UNSND (attr
)));
16356 DW_UNSND (attr
) = 0;
16362 /* Read an attribute described by an abbreviated attribute. */
16364 static const gdb_byte
*
16365 read_attribute (const struct die_reader_specs
*reader
,
16366 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16367 const gdb_byte
*info_ptr
)
16369 attr
->name
= abbrev
->name
;
16370 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16373 /* Read dwarf information from a buffer. */
16375 static unsigned int
16376 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16378 return bfd_get_8 (abfd
, buf
);
16382 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16384 return bfd_get_signed_8 (abfd
, buf
);
16387 static unsigned int
16388 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16390 return bfd_get_16 (abfd
, buf
);
16394 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16396 return bfd_get_signed_16 (abfd
, buf
);
16399 static unsigned int
16400 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16402 return bfd_get_32 (abfd
, buf
);
16406 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16408 return bfd_get_signed_32 (abfd
, buf
);
16412 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16414 return bfd_get_64 (abfd
, buf
);
16418 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16419 unsigned int *bytes_read
)
16421 struct comp_unit_head
*cu_header
= &cu
->header
;
16422 CORE_ADDR retval
= 0;
16424 if (cu_header
->signed_addr_p
)
16426 switch (cu_header
->addr_size
)
16429 retval
= bfd_get_signed_16 (abfd
, buf
);
16432 retval
= bfd_get_signed_32 (abfd
, buf
);
16435 retval
= bfd_get_signed_64 (abfd
, buf
);
16438 internal_error (__FILE__
, __LINE__
,
16439 _("read_address: bad switch, signed [in module %s]"),
16440 bfd_get_filename (abfd
));
16445 switch (cu_header
->addr_size
)
16448 retval
= bfd_get_16 (abfd
, buf
);
16451 retval
= bfd_get_32 (abfd
, buf
);
16454 retval
= bfd_get_64 (abfd
, buf
);
16457 internal_error (__FILE__
, __LINE__
,
16458 _("read_address: bad switch, "
16459 "unsigned [in module %s]"),
16460 bfd_get_filename (abfd
));
16464 *bytes_read
= cu_header
->addr_size
;
16468 /* Read the initial length from a section. The (draft) DWARF 3
16469 specification allows the initial length to take up either 4 bytes
16470 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16471 bytes describe the length and all offsets will be 8 bytes in length
16474 An older, non-standard 64-bit format is also handled by this
16475 function. The older format in question stores the initial length
16476 as an 8-byte quantity without an escape value. Lengths greater
16477 than 2^32 aren't very common which means that the initial 4 bytes
16478 is almost always zero. Since a length value of zero doesn't make
16479 sense for the 32-bit format, this initial zero can be considered to
16480 be an escape value which indicates the presence of the older 64-bit
16481 format. As written, the code can't detect (old format) lengths
16482 greater than 4GB. If it becomes necessary to handle lengths
16483 somewhat larger than 4GB, we could allow other small values (such
16484 as the non-sensical values of 1, 2, and 3) to also be used as
16485 escape values indicating the presence of the old format.
16487 The value returned via bytes_read should be used to increment the
16488 relevant pointer after calling read_initial_length().
16490 [ Note: read_initial_length() and read_offset() are based on the
16491 document entitled "DWARF Debugging Information Format", revision
16492 3, draft 8, dated November 19, 2001. This document was obtained
16495 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16497 This document is only a draft and is subject to change. (So beware.)
16499 Details regarding the older, non-standard 64-bit format were
16500 determined empirically by examining 64-bit ELF files produced by
16501 the SGI toolchain on an IRIX 6.5 machine.
16503 - Kevin, July 16, 2002
16507 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16509 LONGEST length
= bfd_get_32 (abfd
, buf
);
16511 if (length
== 0xffffffff)
16513 length
= bfd_get_64 (abfd
, buf
+ 4);
16516 else if (length
== 0)
16518 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16519 length
= bfd_get_64 (abfd
, buf
);
16530 /* Cover function for read_initial_length.
16531 Returns the length of the object at BUF, and stores the size of the
16532 initial length in *BYTES_READ and stores the size that offsets will be in
16534 If the initial length size is not equivalent to that specified in
16535 CU_HEADER then issue a complaint.
16536 This is useful when reading non-comp-unit headers. */
16539 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16540 const struct comp_unit_head
*cu_header
,
16541 unsigned int *bytes_read
,
16542 unsigned int *offset_size
)
16544 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16546 gdb_assert (cu_header
->initial_length_size
== 4
16547 || cu_header
->initial_length_size
== 8
16548 || cu_header
->initial_length_size
== 12);
16550 if (cu_header
->initial_length_size
!= *bytes_read
)
16551 complaint (&symfile_complaints
,
16552 _("intermixed 32-bit and 64-bit DWARF sections"));
16554 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16558 /* Read an offset from the data stream. The size of the offset is
16559 given by cu_header->offset_size. */
16562 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16563 const struct comp_unit_head
*cu_header
,
16564 unsigned int *bytes_read
)
16566 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16568 *bytes_read
= cu_header
->offset_size
;
16572 /* Read an offset from the data stream. */
16575 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16577 LONGEST retval
= 0;
16579 switch (offset_size
)
16582 retval
= bfd_get_32 (abfd
, buf
);
16585 retval
= bfd_get_64 (abfd
, buf
);
16588 internal_error (__FILE__
, __LINE__
,
16589 _("read_offset_1: bad switch [in module %s]"),
16590 bfd_get_filename (abfd
));
16596 static const gdb_byte
*
16597 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16599 /* If the size of a host char is 8 bits, we can return a pointer
16600 to the buffer, otherwise we have to copy the data to a buffer
16601 allocated on the temporary obstack. */
16602 gdb_assert (HOST_CHAR_BIT
== 8);
16606 static const char *
16607 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16608 unsigned int *bytes_read_ptr
)
16610 /* If the size of a host char is 8 bits, we can return a pointer
16611 to the string, otherwise we have to copy the string to a buffer
16612 allocated on the temporary obstack. */
16613 gdb_assert (HOST_CHAR_BIT
== 8);
16616 *bytes_read_ptr
= 1;
16619 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16620 return (const char *) buf
;
16623 static const char *
16624 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16626 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16627 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16628 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16629 bfd_get_filename (abfd
));
16630 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16631 error (_("DW_FORM_strp pointing outside of "
16632 ".debug_str section [in module %s]"),
16633 bfd_get_filename (abfd
));
16634 gdb_assert (HOST_CHAR_BIT
== 8);
16635 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16637 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16640 /* Read a string at offset STR_OFFSET in the .debug_str section from
16641 the .dwz file DWZ. Throw an error if the offset is too large. If
16642 the string consists of a single NUL byte, return NULL; otherwise
16643 return a pointer to the string. */
16645 static const char *
16646 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16648 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16650 if (dwz
->str
.buffer
== NULL
)
16651 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16652 "section [in module %s]"),
16653 bfd_get_filename (dwz
->dwz_bfd
));
16654 if (str_offset
>= dwz
->str
.size
)
16655 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16656 ".debug_str section [in module %s]"),
16657 bfd_get_filename (dwz
->dwz_bfd
));
16658 gdb_assert (HOST_CHAR_BIT
== 8);
16659 if (dwz
->str
.buffer
[str_offset
] == '\0')
16661 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16664 static const char *
16665 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16666 const struct comp_unit_head
*cu_header
,
16667 unsigned int *bytes_read_ptr
)
16669 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16671 return read_indirect_string_at_offset (abfd
, str_offset
);
16675 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16676 unsigned int *bytes_read_ptr
)
16679 unsigned int num_read
;
16681 unsigned char byte
;
16689 byte
= bfd_get_8 (abfd
, buf
);
16692 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16693 if ((byte
& 128) == 0)
16699 *bytes_read_ptr
= num_read
;
16704 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16705 unsigned int *bytes_read_ptr
)
16708 int i
, shift
, num_read
;
16709 unsigned char byte
;
16717 byte
= bfd_get_8 (abfd
, buf
);
16720 result
|= ((LONGEST
) (byte
& 127) << shift
);
16722 if ((byte
& 128) == 0)
16727 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16728 result
|= -(((LONGEST
) 1) << shift
);
16729 *bytes_read_ptr
= num_read
;
16733 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16734 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16735 ADDR_SIZE is the size of addresses from the CU header. */
16738 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16740 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16741 bfd
*abfd
= objfile
->obfd
;
16742 const gdb_byte
*info_ptr
;
16744 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16745 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16746 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16747 objfile_name (objfile
));
16748 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16749 error (_("DW_FORM_addr_index pointing outside of "
16750 ".debug_addr section [in module %s]"),
16751 objfile_name (objfile
));
16752 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16753 + addr_base
+ addr_index
* addr_size
);
16754 if (addr_size
== 4)
16755 return bfd_get_32 (abfd
, info_ptr
);
16757 return bfd_get_64 (abfd
, info_ptr
);
16760 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16763 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16765 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16768 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16771 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16772 unsigned int *bytes_read
)
16774 bfd
*abfd
= cu
->objfile
->obfd
;
16775 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16777 return read_addr_index (cu
, addr_index
);
16780 /* Data structure to pass results from dwarf2_read_addr_index_reader
16781 back to dwarf2_read_addr_index. */
16783 struct dwarf2_read_addr_index_data
16785 ULONGEST addr_base
;
16789 /* die_reader_func for dwarf2_read_addr_index. */
16792 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16793 const gdb_byte
*info_ptr
,
16794 struct die_info
*comp_unit_die
,
16798 struct dwarf2_cu
*cu
= reader
->cu
;
16799 struct dwarf2_read_addr_index_data
*aidata
=
16800 (struct dwarf2_read_addr_index_data
*) data
;
16802 aidata
->addr_base
= cu
->addr_base
;
16803 aidata
->addr_size
= cu
->header
.addr_size
;
16806 /* Given an index in .debug_addr, fetch the value.
16807 NOTE: This can be called during dwarf expression evaluation,
16808 long after the debug information has been read, and thus per_cu->cu
16809 may no longer exist. */
16812 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16813 unsigned int addr_index
)
16815 struct objfile
*objfile
= per_cu
->objfile
;
16816 struct dwarf2_cu
*cu
= per_cu
->cu
;
16817 ULONGEST addr_base
;
16820 /* This is intended to be called from outside this file. */
16821 dw2_setup (objfile
);
16823 /* We need addr_base and addr_size.
16824 If we don't have PER_CU->cu, we have to get it.
16825 Nasty, but the alternative is storing the needed info in PER_CU,
16826 which at this point doesn't seem justified: it's not clear how frequently
16827 it would get used and it would increase the size of every PER_CU.
16828 Entry points like dwarf2_per_cu_addr_size do a similar thing
16829 so we're not in uncharted territory here.
16830 Alas we need to be a bit more complicated as addr_base is contained
16833 We don't need to read the entire CU(/TU).
16834 We just need the header and top level die.
16836 IWBN to use the aging mechanism to let us lazily later discard the CU.
16837 For now we skip this optimization. */
16841 addr_base
= cu
->addr_base
;
16842 addr_size
= cu
->header
.addr_size
;
16846 struct dwarf2_read_addr_index_data aidata
;
16848 /* Note: We can't use init_cutu_and_read_dies_simple here,
16849 we need addr_base. */
16850 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16851 dwarf2_read_addr_index_reader
, &aidata
);
16852 addr_base
= aidata
.addr_base
;
16853 addr_size
= aidata
.addr_size
;
16856 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16859 /* Given a DW_FORM_GNU_str_index, fetch the string.
16860 This is only used by the Fission support. */
16862 static const char *
16863 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16865 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16866 const char *objf_name
= objfile_name (objfile
);
16867 bfd
*abfd
= objfile
->obfd
;
16868 struct dwarf2_cu
*cu
= reader
->cu
;
16869 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16870 struct dwarf2_section_info
*str_offsets_section
=
16871 &reader
->dwo_file
->sections
.str_offsets
;
16872 const gdb_byte
*info_ptr
;
16873 ULONGEST str_offset
;
16874 static const char form_name
[] = "DW_FORM_GNU_str_index";
16876 dwarf2_read_section (objfile
, str_section
);
16877 dwarf2_read_section (objfile
, str_offsets_section
);
16878 if (str_section
->buffer
== NULL
)
16879 error (_("%s used without .debug_str.dwo section"
16880 " in CU at offset 0x%lx [in module %s]"),
16881 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16882 if (str_offsets_section
->buffer
== NULL
)
16883 error (_("%s used without .debug_str_offsets.dwo section"
16884 " in CU at offset 0x%lx [in module %s]"),
16885 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16886 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16887 error (_("%s pointing outside of .debug_str_offsets.dwo"
16888 " section in CU at offset 0x%lx [in module %s]"),
16889 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16890 info_ptr
= (str_offsets_section
->buffer
16891 + str_index
* cu
->header
.offset_size
);
16892 if (cu
->header
.offset_size
== 4)
16893 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16895 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16896 if (str_offset
>= str_section
->size
)
16897 error (_("Offset from %s pointing outside of"
16898 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16899 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16900 return (const char *) (str_section
->buffer
+ str_offset
);
16903 /* Return the length of an LEB128 number in BUF. */
16906 leb128_size (const gdb_byte
*buf
)
16908 const gdb_byte
*begin
= buf
;
16914 if ((byte
& 128) == 0)
16915 return buf
- begin
;
16920 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16929 cu
->language
= language_c
;
16931 case DW_LANG_C_plus_plus
:
16932 case DW_LANG_C_plus_plus_11
:
16933 case DW_LANG_C_plus_plus_14
:
16934 cu
->language
= language_cplus
;
16937 cu
->language
= language_d
;
16939 case DW_LANG_Fortran77
:
16940 case DW_LANG_Fortran90
:
16941 case DW_LANG_Fortran95
:
16942 case DW_LANG_Fortran03
:
16943 case DW_LANG_Fortran08
:
16944 cu
->language
= language_fortran
;
16947 cu
->language
= language_go
;
16949 case DW_LANG_Mips_Assembler
:
16950 cu
->language
= language_asm
;
16953 cu
->language
= language_java
;
16955 case DW_LANG_Ada83
:
16956 case DW_LANG_Ada95
:
16957 cu
->language
= language_ada
;
16959 case DW_LANG_Modula2
:
16960 cu
->language
= language_m2
;
16962 case DW_LANG_Pascal83
:
16963 cu
->language
= language_pascal
;
16966 cu
->language
= language_objc
;
16968 case DW_LANG_Cobol74
:
16969 case DW_LANG_Cobol85
:
16971 cu
->language
= language_minimal
;
16974 cu
->language_defn
= language_def (cu
->language
);
16977 /* Return the named attribute or NULL if not there. */
16979 static struct attribute
*
16980 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
16985 struct attribute
*spec
= NULL
;
16987 for (i
= 0; i
< die
->num_attrs
; ++i
)
16989 if (die
->attrs
[i
].name
== name
)
16990 return &die
->attrs
[i
];
16991 if (die
->attrs
[i
].name
== DW_AT_specification
16992 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
16993 spec
= &die
->attrs
[i
];
16999 die
= follow_die_ref (die
, spec
, &cu
);
17005 /* Return the named attribute or NULL if not there,
17006 but do not follow DW_AT_specification, etc.
17007 This is for use in contexts where we're reading .debug_types dies.
17008 Following DW_AT_specification, DW_AT_abstract_origin will take us
17009 back up the chain, and we want to go down. */
17011 static struct attribute
*
17012 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17016 for (i
= 0; i
< die
->num_attrs
; ++i
)
17017 if (die
->attrs
[i
].name
== name
)
17018 return &die
->attrs
[i
];
17023 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17024 and holds a non-zero value. This function should only be used for
17025 DW_FORM_flag or DW_FORM_flag_present attributes. */
17028 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17030 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17032 return (attr
&& DW_UNSND (attr
));
17036 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17038 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17039 which value is non-zero. However, we have to be careful with
17040 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17041 (via dwarf2_flag_true_p) follows this attribute. So we may
17042 end up accidently finding a declaration attribute that belongs
17043 to a different DIE referenced by the specification attribute,
17044 even though the given DIE does not have a declaration attribute. */
17045 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17046 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17049 /* Return the die giving the specification for DIE, if there is
17050 one. *SPEC_CU is the CU containing DIE on input, and the CU
17051 containing the return value on output. If there is no
17052 specification, but there is an abstract origin, that is
17055 static struct die_info
*
17056 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17058 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17061 if (spec_attr
== NULL
)
17062 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17064 if (spec_attr
== NULL
)
17067 return follow_die_ref (die
, spec_attr
, spec_cu
);
17070 /* Free the line_header structure *LH, and any arrays and strings it
17072 NOTE: This is also used as a "cleanup" function. */
17075 free_line_header (struct line_header
*lh
)
17077 if (lh
->standard_opcode_lengths
)
17078 xfree (lh
->standard_opcode_lengths
);
17080 /* Remember that all the lh->file_names[i].name pointers are
17081 pointers into debug_line_buffer, and don't need to be freed. */
17082 if (lh
->file_names
)
17083 xfree (lh
->file_names
);
17085 /* Similarly for the include directory names. */
17086 if (lh
->include_dirs
)
17087 xfree (lh
->include_dirs
);
17092 /* Stub for free_line_header to match void * callback types. */
17095 free_line_header_voidp (void *arg
)
17097 struct line_header
*lh
= arg
;
17099 free_line_header (lh
);
17102 /* Add an entry to LH's include directory table. */
17105 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17107 /* Grow the array if necessary. */
17108 if (lh
->include_dirs_size
== 0)
17110 lh
->include_dirs_size
= 1; /* for testing */
17111 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17112 * sizeof (*lh
->include_dirs
));
17114 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17116 lh
->include_dirs_size
*= 2;
17117 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17118 (lh
->include_dirs_size
17119 * sizeof (*lh
->include_dirs
)));
17122 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17125 /* Add an entry to LH's file name table. */
17128 add_file_name (struct line_header
*lh
,
17130 unsigned int dir_index
,
17131 unsigned int mod_time
,
17132 unsigned int length
)
17134 struct file_entry
*fe
;
17136 /* Grow the array if necessary. */
17137 if (lh
->file_names_size
== 0)
17139 lh
->file_names_size
= 1; /* for testing */
17140 lh
->file_names
= xmalloc (lh
->file_names_size
17141 * sizeof (*lh
->file_names
));
17143 else if (lh
->num_file_names
>= lh
->file_names_size
)
17145 lh
->file_names_size
*= 2;
17146 lh
->file_names
= xrealloc (lh
->file_names
,
17147 (lh
->file_names_size
17148 * sizeof (*lh
->file_names
)));
17151 fe
= &lh
->file_names
[lh
->num_file_names
++];
17153 fe
->dir_index
= dir_index
;
17154 fe
->mod_time
= mod_time
;
17155 fe
->length
= length
;
17156 fe
->included_p
= 0;
17160 /* A convenience function to find the proper .debug_line section for a
17163 static struct dwarf2_section_info
*
17164 get_debug_line_section (struct dwarf2_cu
*cu
)
17166 struct dwarf2_section_info
*section
;
17168 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17170 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17171 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17172 else if (cu
->per_cu
->is_dwz
)
17174 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17176 section
= &dwz
->line
;
17179 section
= &dwarf2_per_objfile
->line
;
17184 /* Read the statement program header starting at OFFSET in
17185 .debug_line, or .debug_line.dwo. Return a pointer
17186 to a struct line_header, allocated using xmalloc.
17187 Returns NULL if there is a problem reading the header, e.g., if it
17188 has a version we don't understand.
17190 NOTE: the strings in the include directory and file name tables of
17191 the returned object point into the dwarf line section buffer,
17192 and must not be freed. */
17194 static struct line_header
*
17195 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17197 struct cleanup
*back_to
;
17198 struct line_header
*lh
;
17199 const gdb_byte
*line_ptr
;
17200 unsigned int bytes_read
, offset_size
;
17202 const char *cur_dir
, *cur_file
;
17203 struct dwarf2_section_info
*section
;
17206 section
= get_debug_line_section (cu
);
17207 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17208 if (section
->buffer
== NULL
)
17210 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17211 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17213 complaint (&symfile_complaints
, _("missing .debug_line section"));
17217 /* We can't do this until we know the section is non-empty.
17218 Only then do we know we have such a section. */
17219 abfd
= get_section_bfd_owner (section
);
17221 /* Make sure that at least there's room for the total_length field.
17222 That could be 12 bytes long, but we're just going to fudge that. */
17223 if (offset
+ 4 >= section
->size
)
17225 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17229 lh
= xmalloc (sizeof (*lh
));
17230 memset (lh
, 0, sizeof (*lh
));
17231 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17234 lh
->offset
.sect_off
= offset
;
17235 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17237 line_ptr
= section
->buffer
+ offset
;
17239 /* Read in the header. */
17241 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17242 &bytes_read
, &offset_size
);
17243 line_ptr
+= bytes_read
;
17244 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17246 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17247 do_cleanups (back_to
);
17250 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17251 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17253 if (lh
->version
> 4)
17255 /* This is a version we don't understand. The format could have
17256 changed in ways we don't handle properly so just punt. */
17257 complaint (&symfile_complaints
,
17258 _("unsupported version in .debug_line section"));
17261 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17262 line_ptr
+= offset_size
;
17263 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17265 if (lh
->version
>= 4)
17267 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17271 lh
->maximum_ops_per_instruction
= 1;
17273 if (lh
->maximum_ops_per_instruction
== 0)
17275 lh
->maximum_ops_per_instruction
= 1;
17276 complaint (&symfile_complaints
,
17277 _("invalid maximum_ops_per_instruction "
17278 "in `.debug_line' section"));
17281 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17283 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17285 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17287 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17289 lh
->standard_opcode_lengths
17290 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17292 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17293 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17295 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17299 /* Read directory table. */
17300 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17302 line_ptr
+= bytes_read
;
17303 add_include_dir (lh
, cur_dir
);
17305 line_ptr
+= bytes_read
;
17307 /* Read file name table. */
17308 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17310 unsigned int dir_index
, mod_time
, length
;
17312 line_ptr
+= bytes_read
;
17313 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17314 line_ptr
+= bytes_read
;
17315 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17316 line_ptr
+= bytes_read
;
17317 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17318 line_ptr
+= bytes_read
;
17320 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17322 line_ptr
+= bytes_read
;
17323 lh
->statement_program_start
= line_ptr
;
17325 if (line_ptr
> (section
->buffer
+ section
->size
))
17326 complaint (&symfile_complaints
,
17327 _("line number info header doesn't "
17328 "fit in `.debug_line' section"));
17330 discard_cleanups (back_to
);
17334 /* Subroutine of dwarf_decode_lines to simplify it.
17335 Return the file name of the psymtab for included file FILE_INDEX
17336 in line header LH of PST.
17337 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17338 If space for the result is malloc'd, it will be freed by a cleanup.
17339 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17341 The function creates dangling cleanup registration. */
17343 static const char *
17344 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17345 const struct partial_symtab
*pst
,
17346 const char *comp_dir
)
17348 const struct file_entry fe
= lh
->file_names
[file_index
];
17349 const char *include_name
= fe
.name
;
17350 const char *include_name_to_compare
= include_name
;
17351 const char *dir_name
= NULL
;
17352 const char *pst_filename
;
17353 char *copied_name
= NULL
;
17357 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17359 if (!IS_ABSOLUTE_PATH (include_name
)
17360 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17362 /* Avoid creating a duplicate psymtab for PST.
17363 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17364 Before we do the comparison, however, we need to account
17365 for DIR_NAME and COMP_DIR.
17366 First prepend dir_name (if non-NULL). If we still don't
17367 have an absolute path prepend comp_dir (if non-NULL).
17368 However, the directory we record in the include-file's
17369 psymtab does not contain COMP_DIR (to match the
17370 corresponding symtab(s)).
17375 bash$ gcc -g ./hello.c
17376 include_name = "hello.c"
17378 DW_AT_comp_dir = comp_dir = "/tmp"
17379 DW_AT_name = "./hello.c"
17383 if (dir_name
!= NULL
)
17385 char *tem
= concat (dir_name
, SLASH_STRING
,
17386 include_name
, (char *)NULL
);
17388 make_cleanup (xfree
, tem
);
17389 include_name
= tem
;
17390 include_name_to_compare
= include_name
;
17392 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17394 char *tem
= concat (comp_dir
, SLASH_STRING
,
17395 include_name
, (char *)NULL
);
17397 make_cleanup (xfree
, tem
);
17398 include_name_to_compare
= tem
;
17402 pst_filename
= pst
->filename
;
17403 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17405 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17406 pst_filename
, (char *)NULL
);
17407 pst_filename
= copied_name
;
17410 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17412 if (copied_name
!= NULL
)
17413 xfree (copied_name
);
17417 return include_name
;
17420 /* Ignore this record_line request. */
17423 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17428 /* Return non-zero if we should add LINE to the line number table.
17429 LINE is the line to add, LAST_LINE is the last line that was added,
17430 LAST_SUBFILE is the subfile for LAST_LINE.
17431 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17432 had a non-zero discriminator.
17434 We have to be careful in the presence of discriminators.
17435 E.g., for this line:
17437 for (i = 0; i < 100000; i++);
17439 clang can emit four line number entries for that one line,
17440 each with a different discriminator.
17441 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17443 However, we want gdb to coalesce all four entries into one.
17444 Otherwise the user could stepi into the middle of the line and
17445 gdb would get confused about whether the pc really was in the
17446 middle of the line.
17448 Things are further complicated by the fact that two consecutive
17449 line number entries for the same line is a heuristic used by gcc
17450 to denote the end of the prologue. So we can't just discard duplicate
17451 entries, we have to be selective about it. The heuristic we use is
17452 that we only collapse consecutive entries for the same line if at least
17453 one of those entries has a non-zero discriminator. PR 17276.
17455 Note: Addresses in the line number state machine can never go backwards
17456 within one sequence, thus this coalescing is ok. */
17459 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17460 int line_has_non_zero_discriminator
,
17461 struct subfile
*last_subfile
)
17463 if (current_subfile
!= last_subfile
)
17465 if (line
!= last_line
)
17467 /* Same line for the same file that we've seen already.
17468 As a last check, for pr 17276, only record the line if the line
17469 has never had a non-zero discriminator. */
17470 if (!line_has_non_zero_discriminator
)
17475 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17476 in the line table of subfile SUBFILE. */
17479 dwarf_record_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17480 unsigned int line
, CORE_ADDR address
,
17481 record_line_ftype p_record_line
)
17483 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17485 (*p_record_line
) (subfile
, line
, addr
);
17488 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17489 Mark the end of a set of line number records.
17490 The arguments are the same as for dwarf_record_line.
17491 If SUBFILE is NULL the request is ignored. */
17494 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17495 CORE_ADDR address
, record_line_ftype p_record_line
)
17497 if (subfile
!= NULL
)
17498 dwarf_record_line (gdbarch
, subfile
, 0, address
, p_record_line
);
17501 /* Subroutine of dwarf_decode_lines to simplify it.
17502 Process the line number information in LH. */
17505 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17506 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17508 const gdb_byte
*line_ptr
, *extended_end
;
17509 const gdb_byte
*line_end
;
17510 unsigned int bytes_read
, extended_len
;
17511 unsigned char op_code
, extended_op
;
17512 CORE_ADDR baseaddr
;
17513 struct objfile
*objfile
= cu
->objfile
;
17514 bfd
*abfd
= objfile
->obfd
;
17515 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17516 struct subfile
*last_subfile
= NULL
;
17517 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17520 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17522 line_ptr
= lh
->statement_program_start
;
17523 line_end
= lh
->statement_program_end
;
17525 /* Read the statement sequences until there's nothing left. */
17526 while (line_ptr
< line_end
)
17528 /* State machine registers. Call `gdbarch_adjust_dwarf2_line'
17529 on the initial 0 address as if there was a line entry for it
17530 so that the backend has a chance to adjust it and also record
17531 it in case it needs it. This is currently used by MIPS code,
17532 cf. `mips_adjust_dwarf2_line'. */
17533 CORE_ADDR address
= gdbarch_adjust_dwarf2_line (gdbarch
, 0, 0);
17534 unsigned int file
= 1;
17535 unsigned int line
= 1;
17536 int is_stmt
= lh
->default_is_stmt
;
17537 int end_sequence
= 0;
17538 unsigned char op_index
= 0;
17539 unsigned int discriminator
= 0;
17540 /* The last line number that was recorded, used to coalesce
17541 consecutive entries for the same line. This can happen, for
17542 example, when discriminators are present. PR 17276. */
17543 unsigned int last_line
= 0;
17544 int line_has_non_zero_discriminator
= 0;
17546 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17548 /* Start a subfile for the current file of the state machine. */
17549 /* lh->include_dirs and lh->file_names are 0-based, but the
17550 directory and file name numbers in the statement program
17552 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17553 const char *dir
= NULL
;
17556 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17558 dwarf2_start_subfile (fe
->name
, dir
);
17561 /* Decode the table. */
17562 while (!end_sequence
)
17564 op_code
= read_1_byte (abfd
, line_ptr
);
17566 if (line_ptr
> line_end
)
17568 dwarf2_debug_line_missing_end_sequence_complaint ();
17572 if (op_code
>= lh
->opcode_base
)
17574 /* Special opcode. */
17575 unsigned char adj_opcode
;
17576 CORE_ADDR addr_adj
;
17579 adj_opcode
= op_code
- lh
->opcode_base
;
17580 addr_adj
= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17581 / lh
->maximum_ops_per_instruction
)
17582 * lh
->minimum_instruction_length
);
17583 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17584 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17585 % lh
->maximum_ops_per_instruction
);
17586 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17587 line
+= line_delta
;
17588 if (line_delta
!= 0)
17589 line_has_non_zero_discriminator
= discriminator
!= 0;
17590 if (lh
->num_file_names
< file
|| file
== 0)
17591 dwarf2_debug_line_missing_file_complaint ();
17592 /* For now we ignore lines not starting on an
17593 instruction boundary. */
17594 else if (op_index
== 0)
17596 lh
->file_names
[file
- 1].included_p
= 1;
17597 if (!decode_for_pst_p
&& is_stmt
)
17599 if (last_subfile
!= current_subfile
)
17601 dwarf_finish_line (gdbarch
, last_subfile
,
17602 address
, p_record_line
);
17604 if (dwarf_record_line_p (line
, last_line
,
17605 line_has_non_zero_discriminator
,
17608 dwarf_record_line (gdbarch
, current_subfile
,
17609 line
, address
, p_record_line
);
17611 last_subfile
= current_subfile
;
17617 else switch (op_code
)
17619 case DW_LNS_extended_op
:
17620 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17622 line_ptr
+= bytes_read
;
17623 extended_end
= line_ptr
+ extended_len
;
17624 extended_op
= read_1_byte (abfd
, line_ptr
);
17626 switch (extended_op
)
17628 case DW_LNE_end_sequence
:
17629 p_record_line
= record_line
;
17632 case DW_LNE_set_address
:
17633 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17635 /* If address < lowpc then it's not a usable value, it's
17636 outside the pc range of the CU. However, we restrict
17637 the test to only address values of zero to preserve
17638 GDB's previous behaviour which is to handle the specific
17639 case of a function being GC'd by the linker. */
17640 if (address
== 0 && address
< lowpc
)
17642 /* This line table is for a function which has been
17643 GCd by the linker. Ignore it. PR gdb/12528 */
17646 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17648 complaint (&symfile_complaints
,
17649 _(".debug_line address at offset 0x%lx is 0 "
17651 line_offset
, objfile_name (objfile
));
17652 p_record_line
= noop_record_line
;
17653 /* Note: p_record_line is left as noop_record_line
17654 until we see DW_LNE_end_sequence. */
17658 line_ptr
+= bytes_read
;
17659 address
+= baseaddr
;
17660 address
= gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17662 case DW_LNE_define_file
:
17664 const char *cur_file
;
17665 unsigned int dir_index
, mod_time
, length
;
17667 cur_file
= read_direct_string (abfd
, line_ptr
,
17669 line_ptr
+= bytes_read
;
17671 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17672 line_ptr
+= bytes_read
;
17674 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17675 line_ptr
+= bytes_read
;
17677 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17678 line_ptr
+= bytes_read
;
17679 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17682 case DW_LNE_set_discriminator
:
17683 /* The discriminator is not interesting to the debugger;
17684 just ignore it. We still need to check its value though:
17685 if there are consecutive entries for the same
17686 (non-prologue) line we want to coalesce them.
17688 discriminator
= read_unsigned_leb128 (abfd
, line_ptr
,
17690 line_has_non_zero_discriminator
|= discriminator
!= 0;
17691 line_ptr
+= bytes_read
;
17694 complaint (&symfile_complaints
,
17695 _("mangled .debug_line section"));
17698 /* Make sure that we parsed the extended op correctly. If e.g.
17699 we expected a different address size than the producer used,
17700 we may have read the wrong number of bytes. */
17701 if (line_ptr
!= extended_end
)
17703 complaint (&symfile_complaints
,
17704 _("mangled .debug_line section"));
17709 if (lh
->num_file_names
< file
|| file
== 0)
17710 dwarf2_debug_line_missing_file_complaint ();
17713 lh
->file_names
[file
- 1].included_p
= 1;
17714 if (!decode_for_pst_p
&& is_stmt
)
17716 if (last_subfile
!= current_subfile
)
17718 dwarf_finish_line (gdbarch
, last_subfile
,
17719 address
, p_record_line
);
17721 if (dwarf_record_line_p (line
, last_line
,
17722 line_has_non_zero_discriminator
,
17725 dwarf_record_line (gdbarch
, current_subfile
,
17726 line
, address
, p_record_line
);
17728 last_subfile
= current_subfile
;
17734 case DW_LNS_advance_pc
:
17737 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17738 CORE_ADDR addr_adj
;
17740 addr_adj
= (((op_index
+ adjust
)
17741 / lh
->maximum_ops_per_instruction
)
17742 * lh
->minimum_instruction_length
);
17743 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17744 op_index
= ((op_index
+ adjust
)
17745 % lh
->maximum_ops_per_instruction
);
17746 line_ptr
+= bytes_read
;
17749 case DW_LNS_advance_line
:
17752 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17754 line
+= line_delta
;
17755 if (line_delta
!= 0)
17756 line_has_non_zero_discriminator
= discriminator
!= 0;
17757 line_ptr
+= bytes_read
;
17760 case DW_LNS_set_file
:
17762 /* The arrays lh->include_dirs and lh->file_names are
17763 0-based, but the directory and file name numbers in
17764 the statement program are 1-based. */
17765 struct file_entry
*fe
;
17766 const char *dir
= NULL
;
17768 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17769 line_ptr
+= bytes_read
;
17770 if (lh
->num_file_names
< file
|| file
== 0)
17771 dwarf2_debug_line_missing_file_complaint ();
17774 fe
= &lh
->file_names
[file
- 1];
17776 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17777 if (!decode_for_pst_p
)
17779 last_subfile
= current_subfile
;
17780 line_has_non_zero_discriminator
= discriminator
!= 0;
17781 dwarf2_start_subfile (fe
->name
, dir
);
17786 case DW_LNS_set_column
:
17787 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17788 line_ptr
+= bytes_read
;
17790 case DW_LNS_negate_stmt
:
17791 is_stmt
= (!is_stmt
);
17793 case DW_LNS_set_basic_block
:
17795 /* Add to the address register of the state machine the
17796 address increment value corresponding to special opcode
17797 255. I.e., this value is scaled by the minimum
17798 instruction length since special opcode 255 would have
17799 scaled the increment. */
17800 case DW_LNS_const_add_pc
:
17802 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17803 CORE_ADDR addr_adj
;
17805 addr_adj
= (((op_index
+ adjust
)
17806 / lh
->maximum_ops_per_instruction
)
17807 * lh
->minimum_instruction_length
);
17808 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17809 op_index
= ((op_index
+ adjust
)
17810 % lh
->maximum_ops_per_instruction
);
17813 case DW_LNS_fixed_advance_pc
:
17815 CORE_ADDR addr_adj
;
17817 addr_adj
= read_2_bytes (abfd
, line_ptr
);
17818 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17825 /* Unknown standard opcode, ignore it. */
17828 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17830 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17831 line_ptr
+= bytes_read
;
17836 if (lh
->num_file_names
< file
|| file
== 0)
17837 dwarf2_debug_line_missing_file_complaint ();
17840 lh
->file_names
[file
- 1].included_p
= 1;
17841 if (!decode_for_pst_p
)
17843 dwarf_finish_line (gdbarch
, current_subfile
, address
,
17850 /* Decode the Line Number Program (LNP) for the given line_header
17851 structure and CU. The actual information extracted and the type
17852 of structures created from the LNP depends on the value of PST.
17854 1. If PST is NULL, then this procedure uses the data from the program
17855 to create all necessary symbol tables, and their linetables.
17857 2. If PST is not NULL, this procedure reads the program to determine
17858 the list of files included by the unit represented by PST, and
17859 builds all the associated partial symbol tables.
17861 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17862 It is used for relative paths in the line table.
17863 NOTE: When processing partial symtabs (pst != NULL),
17864 comp_dir == pst->dirname.
17866 NOTE: It is important that psymtabs have the same file name (via strcmp)
17867 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17868 symtab we don't use it in the name of the psymtabs we create.
17869 E.g. expand_line_sal requires this when finding psymtabs to expand.
17870 A good testcase for this is mb-inline.exp.
17872 LOWPC is the lowest address in CU (or 0 if not known).
17874 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
17875 for its PC<->lines mapping information. Otherwise only the filename
17876 table is read in. */
17879 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17880 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17881 CORE_ADDR lowpc
, int decode_mapping
)
17883 struct objfile
*objfile
= cu
->objfile
;
17884 const int decode_for_pst_p
= (pst
!= NULL
);
17886 if (decode_mapping
)
17887 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
17889 if (decode_for_pst_p
)
17893 /* Now that we're done scanning the Line Header Program, we can
17894 create the psymtab of each included file. */
17895 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17896 if (lh
->file_names
[file_index
].included_p
== 1)
17898 const char *include_name
=
17899 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17900 if (include_name
!= NULL
)
17901 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17906 /* Make sure a symtab is created for every file, even files
17907 which contain only variables (i.e. no code with associated
17909 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
17912 for (i
= 0; i
< lh
->num_file_names
; i
++)
17914 const char *dir
= NULL
;
17915 struct file_entry
*fe
;
17917 fe
= &lh
->file_names
[i
];
17919 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17920 dwarf2_start_subfile (fe
->name
, dir
);
17922 if (current_subfile
->symtab
== NULL
)
17924 current_subfile
->symtab
17925 = allocate_symtab (cust
, current_subfile
->name
);
17927 fe
->symtab
= current_subfile
->symtab
;
17932 /* Start a subfile for DWARF. FILENAME is the name of the file and
17933 DIRNAME the name of the source directory which contains FILENAME
17934 or NULL if not known.
17935 This routine tries to keep line numbers from identical absolute and
17936 relative file names in a common subfile.
17938 Using the `list' example from the GDB testsuite, which resides in
17939 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17940 of /srcdir/list0.c yields the following debugging information for list0.c:
17942 DW_AT_name: /srcdir/list0.c
17943 DW_AT_comp_dir: /compdir
17944 files.files[0].name: list0.h
17945 files.files[0].dir: /srcdir
17946 files.files[1].name: list0.c
17947 files.files[1].dir: /srcdir
17949 The line number information for list0.c has to end up in a single
17950 subfile, so that `break /srcdir/list0.c:1' works as expected.
17951 start_subfile will ensure that this happens provided that we pass the
17952 concatenation of files.files[1].dir and files.files[1].name as the
17956 dwarf2_start_subfile (const char *filename
, const char *dirname
)
17960 /* In order not to lose the line information directory,
17961 we concatenate it to the filename when it makes sense.
17962 Note that the Dwarf3 standard says (speaking of filenames in line
17963 information): ``The directory index is ignored for file names
17964 that represent full path names''. Thus ignoring dirname in the
17965 `else' branch below isn't an issue. */
17967 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
17969 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
17973 start_subfile (filename
);
17979 /* Start a symtab for DWARF.
17980 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17982 static struct compunit_symtab
*
17983 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
17984 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
17986 struct compunit_symtab
*cust
17987 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
17989 record_debugformat ("DWARF 2");
17990 record_producer (cu
->producer
);
17992 /* We assume that we're processing GCC output. */
17993 processing_gcc_compilation
= 2;
17995 cu
->processing_has_namespace_info
= 0;
18001 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18002 struct dwarf2_cu
*cu
)
18004 struct objfile
*objfile
= cu
->objfile
;
18005 struct comp_unit_head
*cu_header
= &cu
->header
;
18007 /* NOTE drow/2003-01-30: There used to be a comment and some special
18008 code here to turn a symbol with DW_AT_external and a
18009 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18010 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18011 with some versions of binutils) where shared libraries could have
18012 relocations against symbols in their debug information - the
18013 minimal symbol would have the right address, but the debug info
18014 would not. It's no longer necessary, because we will explicitly
18015 apply relocations when we read in the debug information now. */
18017 /* A DW_AT_location attribute with no contents indicates that a
18018 variable has been optimized away. */
18019 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18021 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18025 /* Handle one degenerate form of location expression specially, to
18026 preserve GDB's previous behavior when section offsets are
18027 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18028 then mark this symbol as LOC_STATIC. */
18030 if (attr_form_is_block (attr
)
18031 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18032 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18033 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18034 && (DW_BLOCK (attr
)->size
18035 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18037 unsigned int dummy
;
18039 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18040 SYMBOL_VALUE_ADDRESS (sym
) =
18041 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18043 SYMBOL_VALUE_ADDRESS (sym
) =
18044 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18045 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18046 fixup_symbol_section (sym
, objfile
);
18047 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18048 SYMBOL_SECTION (sym
));
18052 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18053 expression evaluator, and use LOC_COMPUTED only when necessary
18054 (i.e. when the value of a register or memory location is
18055 referenced, or a thread-local block, etc.). Then again, it might
18056 not be worthwhile. I'm assuming that it isn't unless performance
18057 or memory numbers show me otherwise. */
18059 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18061 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18062 cu
->has_loclist
= 1;
18065 /* Given a pointer to a DWARF information entry, figure out if we need
18066 to make a symbol table entry for it, and if so, create a new entry
18067 and return a pointer to it.
18068 If TYPE is NULL, determine symbol type from the die, otherwise
18069 used the passed type.
18070 If SPACE is not NULL, use it to hold the new symbol. If it is
18071 NULL, allocate a new symbol on the objfile's obstack. */
18073 static struct symbol
*
18074 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18075 struct symbol
*space
)
18077 struct objfile
*objfile
= cu
->objfile
;
18078 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18079 struct symbol
*sym
= NULL
;
18081 struct attribute
*attr
= NULL
;
18082 struct attribute
*attr2
= NULL
;
18083 CORE_ADDR baseaddr
;
18084 struct pending
**list_to_add
= NULL
;
18086 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18088 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18090 name
= dwarf2_name (die
, cu
);
18093 const char *linkagename
;
18094 int suppress_add
= 0;
18099 sym
= allocate_symbol (objfile
);
18100 OBJSTAT (objfile
, n_syms
++);
18102 /* Cache this symbol's name and the name's demangled form (if any). */
18103 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18104 linkagename
= dwarf2_physname (name
, die
, cu
);
18105 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18107 /* Fortran does not have mangling standard and the mangling does differ
18108 between gfortran, iFort etc. */
18109 if (cu
->language
== language_fortran
18110 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18111 symbol_set_demangled_name (&(sym
->ginfo
),
18112 dwarf2_full_name (name
, die
, cu
),
18115 /* Default assumptions.
18116 Use the passed type or decode it from the die. */
18117 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18118 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18120 SYMBOL_TYPE (sym
) = type
;
18122 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18123 attr
= dwarf2_attr (die
,
18124 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18128 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18131 attr
= dwarf2_attr (die
,
18132 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18136 int file_index
= DW_UNSND (attr
);
18138 if (cu
->line_header
== NULL
18139 || file_index
> cu
->line_header
->num_file_names
)
18140 complaint (&symfile_complaints
,
18141 _("file index out of range"));
18142 else if (file_index
> 0)
18144 struct file_entry
*fe
;
18146 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18147 symbol_set_symtab (sym
, fe
->symtab
);
18154 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18159 addr
= attr_value_as_address (attr
);
18160 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18161 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18163 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18164 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18165 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18166 add_symbol_to_list (sym
, cu
->list_in_scope
);
18168 case DW_TAG_subprogram
:
18169 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18171 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18172 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18173 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18174 || cu
->language
== language_ada
)
18176 /* Subprograms marked external are stored as a global symbol.
18177 Ada subprograms, whether marked external or not, are always
18178 stored as a global symbol, because we want to be able to
18179 access them globally. For instance, we want to be able
18180 to break on a nested subprogram without having to
18181 specify the context. */
18182 list_to_add
= &global_symbols
;
18186 list_to_add
= cu
->list_in_scope
;
18189 case DW_TAG_inlined_subroutine
:
18190 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18192 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18193 SYMBOL_INLINED (sym
) = 1;
18194 list_to_add
= cu
->list_in_scope
;
18196 case DW_TAG_template_value_param
:
18198 /* Fall through. */
18199 case DW_TAG_constant
:
18200 case DW_TAG_variable
:
18201 case DW_TAG_member
:
18202 /* Compilation with minimal debug info may result in
18203 variables with missing type entries. Change the
18204 misleading `void' type to something sensible. */
18205 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18207 = objfile_type (objfile
)->nodebug_data_symbol
;
18209 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18210 /* In the case of DW_TAG_member, we should only be called for
18211 static const members. */
18212 if (die
->tag
== DW_TAG_member
)
18214 /* dwarf2_add_field uses die_is_declaration,
18215 so we do the same. */
18216 gdb_assert (die_is_declaration (die
, cu
));
18221 dwarf2_const_value (attr
, sym
, cu
);
18222 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18225 if (attr2
&& (DW_UNSND (attr2
) != 0))
18226 list_to_add
= &global_symbols
;
18228 list_to_add
= cu
->list_in_scope
;
18232 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18235 var_decode_location (attr
, sym
, cu
);
18236 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18238 /* Fortran explicitly imports any global symbols to the local
18239 scope by DW_TAG_common_block. */
18240 if (cu
->language
== language_fortran
&& die
->parent
18241 && die
->parent
->tag
== DW_TAG_common_block
)
18244 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18245 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18246 && !dwarf2_per_objfile
->has_section_at_zero
)
18248 /* When a static variable is eliminated by the linker,
18249 the corresponding debug information is not stripped
18250 out, but the variable address is set to null;
18251 do not add such variables into symbol table. */
18253 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18255 /* Workaround gfortran PR debug/40040 - it uses
18256 DW_AT_location for variables in -fPIC libraries which may
18257 get overriden by other libraries/executable and get
18258 a different address. Resolve it by the minimal symbol
18259 which may come from inferior's executable using copy
18260 relocation. Make this workaround only for gfortran as for
18261 other compilers GDB cannot guess the minimal symbol
18262 Fortran mangling kind. */
18263 if (cu
->language
== language_fortran
&& die
->parent
18264 && die
->parent
->tag
== DW_TAG_module
18266 && startswith (cu
->producer
, "GNU Fortran "))
18267 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18269 /* A variable with DW_AT_external is never static,
18270 but it may be block-scoped. */
18271 list_to_add
= (cu
->list_in_scope
== &file_symbols
18272 ? &global_symbols
: cu
->list_in_scope
);
18275 list_to_add
= cu
->list_in_scope
;
18279 /* We do not know the address of this symbol.
18280 If it is an external symbol and we have type information
18281 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18282 The address of the variable will then be determined from
18283 the minimal symbol table whenever the variable is
18285 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18287 /* Fortran explicitly imports any global symbols to the local
18288 scope by DW_TAG_common_block. */
18289 if (cu
->language
== language_fortran
&& die
->parent
18290 && die
->parent
->tag
== DW_TAG_common_block
)
18292 /* SYMBOL_CLASS doesn't matter here because
18293 read_common_block is going to reset it. */
18295 list_to_add
= cu
->list_in_scope
;
18297 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18298 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18300 /* A variable with DW_AT_external is never static, but it
18301 may be block-scoped. */
18302 list_to_add
= (cu
->list_in_scope
== &file_symbols
18303 ? &global_symbols
: cu
->list_in_scope
);
18305 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18307 else if (!die_is_declaration (die
, cu
))
18309 /* Use the default LOC_OPTIMIZED_OUT class. */
18310 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18312 list_to_add
= cu
->list_in_scope
;
18316 case DW_TAG_formal_parameter
:
18317 /* If we are inside a function, mark this as an argument. If
18318 not, we might be looking at an argument to an inlined function
18319 when we do not have enough information to show inlined frames;
18320 pretend it's a local variable in that case so that the user can
18322 if (context_stack_depth
> 0
18323 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18324 SYMBOL_IS_ARGUMENT (sym
) = 1;
18325 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18328 var_decode_location (attr
, sym
, cu
);
18330 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18333 dwarf2_const_value (attr
, sym
, cu
);
18336 list_to_add
= cu
->list_in_scope
;
18338 case DW_TAG_unspecified_parameters
:
18339 /* From varargs functions; gdb doesn't seem to have any
18340 interest in this information, so just ignore it for now.
18343 case DW_TAG_template_type_param
:
18345 /* Fall through. */
18346 case DW_TAG_class_type
:
18347 case DW_TAG_interface_type
:
18348 case DW_TAG_structure_type
:
18349 case DW_TAG_union_type
:
18350 case DW_TAG_set_type
:
18351 case DW_TAG_enumeration_type
:
18352 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18353 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18356 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18357 really ever be static objects: otherwise, if you try
18358 to, say, break of a class's method and you're in a file
18359 which doesn't mention that class, it won't work unless
18360 the check for all static symbols in lookup_symbol_aux
18361 saves you. See the OtherFileClass tests in
18362 gdb.c++/namespace.exp. */
18366 list_to_add
= (cu
->list_in_scope
== &file_symbols
18367 && (cu
->language
== language_cplus
18368 || cu
->language
== language_java
)
18369 ? &global_symbols
: cu
->list_in_scope
);
18371 /* The semantics of C++ state that "struct foo {
18372 ... }" also defines a typedef for "foo". A Java
18373 class declaration also defines a typedef for the
18375 if (cu
->language
== language_cplus
18376 || cu
->language
== language_java
18377 || cu
->language
== language_ada
)
18379 /* The symbol's name is already allocated along
18380 with this objfile, so we don't need to
18381 duplicate it for the type. */
18382 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18383 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18388 case DW_TAG_typedef
:
18389 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18390 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18391 list_to_add
= cu
->list_in_scope
;
18393 case DW_TAG_base_type
:
18394 case DW_TAG_subrange_type
:
18395 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18396 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18397 list_to_add
= cu
->list_in_scope
;
18399 case DW_TAG_enumerator
:
18400 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18403 dwarf2_const_value (attr
, sym
, cu
);
18406 /* NOTE: carlton/2003-11-10: See comment above in the
18407 DW_TAG_class_type, etc. block. */
18409 list_to_add
= (cu
->list_in_scope
== &file_symbols
18410 && (cu
->language
== language_cplus
18411 || cu
->language
== language_java
)
18412 ? &global_symbols
: cu
->list_in_scope
);
18415 case DW_TAG_imported_declaration
:
18416 case DW_TAG_namespace
:
18417 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18418 list_to_add
= &global_symbols
;
18420 case DW_TAG_module
:
18421 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18422 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18423 list_to_add
= &global_symbols
;
18425 case DW_TAG_common_block
:
18426 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18427 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18428 add_symbol_to_list (sym
, cu
->list_in_scope
);
18431 /* Not a tag we recognize. Hopefully we aren't processing
18432 trash data, but since we must specifically ignore things
18433 we don't recognize, there is nothing else we should do at
18435 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18436 dwarf_tag_name (die
->tag
));
18442 sym
->hash_next
= objfile
->template_symbols
;
18443 objfile
->template_symbols
= sym
;
18444 list_to_add
= NULL
;
18447 if (list_to_add
!= NULL
)
18448 add_symbol_to_list (sym
, list_to_add
);
18450 /* For the benefit of old versions of GCC, check for anonymous
18451 namespaces based on the demangled name. */
18452 if (!cu
->processing_has_namespace_info
18453 && cu
->language
== language_cplus
)
18454 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18459 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18461 static struct symbol
*
18462 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18464 return new_symbol_full (die
, type
, cu
, NULL
);
18467 /* Given an attr with a DW_FORM_dataN value in host byte order,
18468 zero-extend it as appropriate for the symbol's type. The DWARF
18469 standard (v4) is not entirely clear about the meaning of using
18470 DW_FORM_dataN for a constant with a signed type, where the type is
18471 wider than the data. The conclusion of a discussion on the DWARF
18472 list was that this is unspecified. We choose to always zero-extend
18473 because that is the interpretation long in use by GCC. */
18476 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18477 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18479 struct objfile
*objfile
= cu
->objfile
;
18480 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18481 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18482 LONGEST l
= DW_UNSND (attr
);
18484 if (bits
< sizeof (*value
) * 8)
18486 l
&= ((LONGEST
) 1 << bits
) - 1;
18489 else if (bits
== sizeof (*value
) * 8)
18493 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18494 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18501 /* Read a constant value from an attribute. Either set *VALUE, or if
18502 the value does not fit in *VALUE, set *BYTES - either already
18503 allocated on the objfile obstack, or newly allocated on OBSTACK,
18504 or, set *BATON, if we translated the constant to a location
18508 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18509 const char *name
, struct obstack
*obstack
,
18510 struct dwarf2_cu
*cu
,
18511 LONGEST
*value
, const gdb_byte
**bytes
,
18512 struct dwarf2_locexpr_baton
**baton
)
18514 struct objfile
*objfile
= cu
->objfile
;
18515 struct comp_unit_head
*cu_header
= &cu
->header
;
18516 struct dwarf_block
*blk
;
18517 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18518 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18524 switch (attr
->form
)
18527 case DW_FORM_GNU_addr_index
:
18531 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18532 dwarf2_const_value_length_mismatch_complaint (name
,
18533 cu_header
->addr_size
,
18534 TYPE_LENGTH (type
));
18535 /* Symbols of this form are reasonably rare, so we just
18536 piggyback on the existing location code rather than writing
18537 a new implementation of symbol_computed_ops. */
18538 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18539 (*baton
)->per_cu
= cu
->per_cu
;
18540 gdb_assert ((*baton
)->per_cu
);
18542 (*baton
)->size
= 2 + cu_header
->addr_size
;
18543 data
= obstack_alloc (obstack
, (*baton
)->size
);
18544 (*baton
)->data
= data
;
18546 data
[0] = DW_OP_addr
;
18547 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18548 byte_order
, DW_ADDR (attr
));
18549 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18552 case DW_FORM_string
:
18554 case DW_FORM_GNU_str_index
:
18555 case DW_FORM_GNU_strp_alt
:
18556 /* DW_STRING is already allocated on the objfile obstack, point
18558 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18560 case DW_FORM_block1
:
18561 case DW_FORM_block2
:
18562 case DW_FORM_block4
:
18563 case DW_FORM_block
:
18564 case DW_FORM_exprloc
:
18565 blk
= DW_BLOCK (attr
);
18566 if (TYPE_LENGTH (type
) != blk
->size
)
18567 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18568 TYPE_LENGTH (type
));
18569 *bytes
= blk
->data
;
18572 /* The DW_AT_const_value attributes are supposed to carry the
18573 symbol's value "represented as it would be on the target
18574 architecture." By the time we get here, it's already been
18575 converted to host endianness, so we just need to sign- or
18576 zero-extend it as appropriate. */
18577 case DW_FORM_data1
:
18578 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18580 case DW_FORM_data2
:
18581 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18583 case DW_FORM_data4
:
18584 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18586 case DW_FORM_data8
:
18587 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18590 case DW_FORM_sdata
:
18591 *value
= DW_SND (attr
);
18594 case DW_FORM_udata
:
18595 *value
= DW_UNSND (attr
);
18599 complaint (&symfile_complaints
,
18600 _("unsupported const value attribute form: '%s'"),
18601 dwarf_form_name (attr
->form
));
18608 /* Copy constant value from an attribute to a symbol. */
18611 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18612 struct dwarf2_cu
*cu
)
18614 struct objfile
*objfile
= cu
->objfile
;
18615 struct comp_unit_head
*cu_header
= &cu
->header
;
18617 const gdb_byte
*bytes
;
18618 struct dwarf2_locexpr_baton
*baton
;
18620 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18621 SYMBOL_PRINT_NAME (sym
),
18622 &objfile
->objfile_obstack
, cu
,
18623 &value
, &bytes
, &baton
);
18627 SYMBOL_LOCATION_BATON (sym
) = baton
;
18628 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18630 else if (bytes
!= NULL
)
18632 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18633 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18637 SYMBOL_VALUE (sym
) = value
;
18638 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18642 /* Return the type of the die in question using its DW_AT_type attribute. */
18644 static struct type
*
18645 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18647 struct attribute
*type_attr
;
18649 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18652 /* A missing DW_AT_type represents a void type. */
18653 return objfile_type (cu
->objfile
)->builtin_void
;
18656 return lookup_die_type (die
, type_attr
, cu
);
18659 /* True iff CU's producer generates GNAT Ada auxiliary information
18660 that allows to find parallel types through that information instead
18661 of having to do expensive parallel lookups by type name. */
18664 need_gnat_info (struct dwarf2_cu
*cu
)
18666 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18667 of GNAT produces this auxiliary information, without any indication
18668 that it is produced. Part of enhancing the FSF version of GNAT
18669 to produce that information will be to put in place an indicator
18670 that we can use in order to determine whether the descriptive type
18671 info is available or not. One suggestion that has been made is
18672 to use a new attribute, attached to the CU die. For now, assume
18673 that the descriptive type info is not available. */
18677 /* Return the auxiliary type of the die in question using its
18678 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18679 attribute is not present. */
18681 static struct type
*
18682 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18684 struct attribute
*type_attr
;
18686 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18690 return lookup_die_type (die
, type_attr
, cu
);
18693 /* If DIE has a descriptive_type attribute, then set the TYPE's
18694 descriptive type accordingly. */
18697 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18698 struct dwarf2_cu
*cu
)
18700 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18702 if (descriptive_type
)
18704 ALLOCATE_GNAT_AUX_TYPE (type
);
18705 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18709 /* Return the containing type of the die in question using its
18710 DW_AT_containing_type attribute. */
18712 static struct type
*
18713 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18715 struct attribute
*type_attr
;
18717 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18719 error (_("Dwarf Error: Problem turning containing type into gdb type "
18720 "[in module %s]"), objfile_name (cu
->objfile
));
18722 return lookup_die_type (die
, type_attr
, cu
);
18725 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18727 static struct type
*
18728 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18730 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18731 char *message
, *saved
;
18733 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18734 objfile_name (objfile
),
18735 cu
->header
.offset
.sect_off
,
18736 die
->offset
.sect_off
);
18737 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18738 message
, strlen (message
));
18741 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18744 /* Look up the type of DIE in CU using its type attribute ATTR.
18745 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18746 DW_AT_containing_type.
18747 If there is no type substitute an error marker. */
18749 static struct type
*
18750 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18751 struct dwarf2_cu
*cu
)
18753 struct objfile
*objfile
= cu
->objfile
;
18754 struct type
*this_type
;
18756 gdb_assert (attr
->name
== DW_AT_type
18757 || attr
->name
== DW_AT_GNAT_descriptive_type
18758 || attr
->name
== DW_AT_containing_type
);
18760 /* First see if we have it cached. */
18762 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18764 struct dwarf2_per_cu_data
*per_cu
;
18765 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18767 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18768 this_type
= get_die_type_at_offset (offset
, per_cu
);
18770 else if (attr_form_is_ref (attr
))
18772 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18774 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18776 else if (attr
->form
== DW_FORM_ref_sig8
)
18778 ULONGEST signature
= DW_SIGNATURE (attr
);
18780 return get_signatured_type (die
, signature
, cu
);
18784 complaint (&symfile_complaints
,
18785 _("Dwarf Error: Bad type attribute %s in DIE"
18786 " at 0x%x [in module %s]"),
18787 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18788 objfile_name (objfile
));
18789 return build_error_marker_type (cu
, die
);
18792 /* If not cached we need to read it in. */
18794 if (this_type
== NULL
)
18796 struct die_info
*type_die
= NULL
;
18797 struct dwarf2_cu
*type_cu
= cu
;
18799 if (attr_form_is_ref (attr
))
18800 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18801 if (type_die
== NULL
)
18802 return build_error_marker_type (cu
, die
);
18803 /* If we find the type now, it's probably because the type came
18804 from an inter-CU reference and the type's CU got expanded before
18806 this_type
= read_type_die (type_die
, type_cu
);
18809 /* If we still don't have a type use an error marker. */
18811 if (this_type
== NULL
)
18812 return build_error_marker_type (cu
, die
);
18817 /* Return the type in DIE, CU.
18818 Returns NULL for invalid types.
18820 This first does a lookup in die_type_hash,
18821 and only reads the die in if necessary.
18823 NOTE: This can be called when reading in partial or full symbols. */
18825 static struct type
*
18826 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18828 struct type
*this_type
;
18830 this_type
= get_die_type (die
, cu
);
18834 return read_type_die_1 (die
, cu
);
18837 /* Read the type in DIE, CU.
18838 Returns NULL for invalid types. */
18840 static struct type
*
18841 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18843 struct type
*this_type
= NULL
;
18847 case DW_TAG_class_type
:
18848 case DW_TAG_interface_type
:
18849 case DW_TAG_structure_type
:
18850 case DW_TAG_union_type
:
18851 this_type
= read_structure_type (die
, cu
);
18853 case DW_TAG_enumeration_type
:
18854 this_type
= read_enumeration_type (die
, cu
);
18856 case DW_TAG_subprogram
:
18857 case DW_TAG_subroutine_type
:
18858 case DW_TAG_inlined_subroutine
:
18859 this_type
= read_subroutine_type (die
, cu
);
18861 case DW_TAG_array_type
:
18862 this_type
= read_array_type (die
, cu
);
18864 case DW_TAG_set_type
:
18865 this_type
= read_set_type (die
, cu
);
18867 case DW_TAG_pointer_type
:
18868 this_type
= read_tag_pointer_type (die
, cu
);
18870 case DW_TAG_ptr_to_member_type
:
18871 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18873 case DW_TAG_reference_type
:
18874 this_type
= read_tag_reference_type (die
, cu
);
18876 case DW_TAG_const_type
:
18877 this_type
= read_tag_const_type (die
, cu
);
18879 case DW_TAG_volatile_type
:
18880 this_type
= read_tag_volatile_type (die
, cu
);
18882 case DW_TAG_restrict_type
:
18883 this_type
= read_tag_restrict_type (die
, cu
);
18885 case DW_TAG_string_type
:
18886 this_type
= read_tag_string_type (die
, cu
);
18888 case DW_TAG_typedef
:
18889 this_type
= read_typedef (die
, cu
);
18891 case DW_TAG_subrange_type
:
18892 this_type
= read_subrange_type (die
, cu
);
18894 case DW_TAG_base_type
:
18895 this_type
= read_base_type (die
, cu
);
18897 case DW_TAG_unspecified_type
:
18898 this_type
= read_unspecified_type (die
, cu
);
18900 case DW_TAG_namespace
:
18901 this_type
= read_namespace_type (die
, cu
);
18903 case DW_TAG_module
:
18904 this_type
= read_module_type (die
, cu
);
18906 case DW_TAG_atomic_type
:
18907 this_type
= read_tag_atomic_type (die
, cu
);
18910 complaint (&symfile_complaints
,
18911 _("unexpected tag in read_type_die: '%s'"),
18912 dwarf_tag_name (die
->tag
));
18919 /* See if we can figure out if the class lives in a namespace. We do
18920 this by looking for a member function; its demangled name will
18921 contain namespace info, if there is any.
18922 Return the computed name or NULL.
18923 Space for the result is allocated on the objfile's obstack.
18924 This is the full-die version of guess_partial_die_structure_name.
18925 In this case we know DIE has no useful parent. */
18928 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18930 struct die_info
*spec_die
;
18931 struct dwarf2_cu
*spec_cu
;
18932 struct die_info
*child
;
18935 spec_die
= die_specification (die
, &spec_cu
);
18936 if (spec_die
!= NULL
)
18942 for (child
= die
->child
;
18944 child
= child
->sibling
)
18946 if (child
->tag
== DW_TAG_subprogram
)
18948 struct attribute
*attr
;
18950 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18952 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
18956 = language_class_name_from_physname (cu
->language_defn
,
18960 if (actual_name
!= NULL
)
18962 const char *die_name
= dwarf2_name (die
, cu
);
18964 if (die_name
!= NULL
18965 && strcmp (die_name
, actual_name
) != 0)
18967 /* Strip off the class name from the full name.
18968 We want the prefix. */
18969 int die_name_len
= strlen (die_name
);
18970 int actual_name_len
= strlen (actual_name
);
18972 /* Test for '::' as a sanity check. */
18973 if (actual_name_len
> die_name_len
+ 2
18974 && actual_name
[actual_name_len
18975 - die_name_len
- 1] == ':')
18977 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
18979 actual_name_len
- die_name_len
- 2);
18982 xfree (actual_name
);
18991 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18992 prefix part in such case. See
18993 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18996 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18998 struct attribute
*attr
;
19001 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19002 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19005 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19006 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19009 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19011 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19012 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19015 /* dwarf2_name had to be already called. */
19016 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19018 /* Strip the base name, keep any leading namespaces/classes. */
19019 base
= strrchr (DW_STRING (attr
), ':');
19020 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19023 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19024 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
19027 /* Return the name of the namespace/class that DIE is defined within,
19028 or "" if we can't tell. The caller should not xfree the result.
19030 For example, if we're within the method foo() in the following
19040 then determine_prefix on foo's die will return "N::C". */
19042 static const char *
19043 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19045 struct die_info
*parent
, *spec_die
;
19046 struct dwarf2_cu
*spec_cu
;
19047 struct type
*parent_type
;
19050 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19051 && cu
->language
!= language_fortran
)
19054 retval
= anonymous_struct_prefix (die
, cu
);
19058 /* We have to be careful in the presence of DW_AT_specification.
19059 For example, with GCC 3.4, given the code
19063 // Definition of N::foo.
19067 then we'll have a tree of DIEs like this:
19069 1: DW_TAG_compile_unit
19070 2: DW_TAG_namespace // N
19071 3: DW_TAG_subprogram // declaration of N::foo
19072 4: DW_TAG_subprogram // definition of N::foo
19073 DW_AT_specification // refers to die #3
19075 Thus, when processing die #4, we have to pretend that we're in
19076 the context of its DW_AT_specification, namely the contex of die
19079 spec_die
= die_specification (die
, &spec_cu
);
19080 if (spec_die
== NULL
)
19081 parent
= die
->parent
;
19084 parent
= spec_die
->parent
;
19088 if (parent
== NULL
)
19090 else if (parent
->building_fullname
)
19093 const char *parent_name
;
19095 /* It has been seen on RealView 2.2 built binaries,
19096 DW_TAG_template_type_param types actually _defined_ as
19097 children of the parent class:
19100 template class <class Enum> Class{};
19101 Class<enum E> class_e;
19103 1: DW_TAG_class_type (Class)
19104 2: DW_TAG_enumeration_type (E)
19105 3: DW_TAG_enumerator (enum1:0)
19106 3: DW_TAG_enumerator (enum2:1)
19108 2: DW_TAG_template_type_param
19109 DW_AT_type DW_FORM_ref_udata (E)
19111 Besides being broken debug info, it can put GDB into an
19112 infinite loop. Consider:
19114 When we're building the full name for Class<E>, we'll start
19115 at Class, and go look over its template type parameters,
19116 finding E. We'll then try to build the full name of E, and
19117 reach here. We're now trying to build the full name of E,
19118 and look over the parent DIE for containing scope. In the
19119 broken case, if we followed the parent DIE of E, we'd again
19120 find Class, and once again go look at its template type
19121 arguments, etc., etc. Simply don't consider such parent die
19122 as source-level parent of this die (it can't be, the language
19123 doesn't allow it), and break the loop here. */
19124 name
= dwarf2_name (die
, cu
);
19125 parent_name
= dwarf2_name (parent
, cu
);
19126 complaint (&symfile_complaints
,
19127 _("template param type '%s' defined within parent '%s'"),
19128 name
? name
: "<unknown>",
19129 parent_name
? parent_name
: "<unknown>");
19133 switch (parent
->tag
)
19135 case DW_TAG_namespace
:
19136 parent_type
= read_type_die (parent
, cu
);
19137 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19138 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19139 Work around this problem here. */
19140 if (cu
->language
== language_cplus
19141 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19143 /* We give a name to even anonymous namespaces. */
19144 return TYPE_TAG_NAME (parent_type
);
19145 case DW_TAG_class_type
:
19146 case DW_TAG_interface_type
:
19147 case DW_TAG_structure_type
:
19148 case DW_TAG_union_type
:
19149 case DW_TAG_module
:
19150 parent_type
= read_type_die (parent
, cu
);
19151 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19152 return TYPE_TAG_NAME (parent_type
);
19154 /* An anonymous structure is only allowed non-static data
19155 members; no typedefs, no member functions, et cetera.
19156 So it does not need a prefix. */
19158 case DW_TAG_compile_unit
:
19159 case DW_TAG_partial_unit
:
19160 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19161 if (cu
->language
== language_cplus
19162 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19163 && die
->child
!= NULL
19164 && (die
->tag
== DW_TAG_class_type
19165 || die
->tag
== DW_TAG_structure_type
19166 || die
->tag
== DW_TAG_union_type
))
19168 char *name
= guess_full_die_structure_name (die
, cu
);
19173 case DW_TAG_enumeration_type
:
19174 parent_type
= read_type_die (parent
, cu
);
19175 if (TYPE_DECLARED_CLASS (parent_type
))
19177 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19178 return TYPE_TAG_NAME (parent_type
);
19181 /* Fall through. */
19183 return determine_prefix (parent
, cu
);
19187 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19188 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19189 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19190 an obconcat, otherwise allocate storage for the result. The CU argument is
19191 used to determine the language and hence, the appropriate separator. */
19193 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19196 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19197 int physname
, struct dwarf2_cu
*cu
)
19199 const char *lead
= "";
19202 if (suffix
== NULL
|| suffix
[0] == '\0'
19203 || prefix
== NULL
|| prefix
[0] == '\0')
19205 else if (cu
->language
== language_java
)
19207 else if (cu
->language
== language_fortran
&& physname
)
19209 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19210 DW_AT_MIPS_linkage_name is preferred and used instead. */
19218 if (prefix
== NULL
)
19220 if (suffix
== NULL
)
19226 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19228 strcpy (retval
, lead
);
19229 strcat (retval
, prefix
);
19230 strcat (retval
, sep
);
19231 strcat (retval
, suffix
);
19236 /* We have an obstack. */
19237 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19241 /* Return sibling of die, NULL if no sibling. */
19243 static struct die_info
*
19244 sibling_die (struct die_info
*die
)
19246 return die
->sibling
;
19249 /* Get name of a die, return NULL if not found. */
19251 static const char *
19252 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19253 struct obstack
*obstack
)
19255 if (name
&& cu
->language
== language_cplus
)
19257 char *canon_name
= cp_canonicalize_string (name
);
19259 if (canon_name
!= NULL
)
19261 if (strcmp (canon_name
, name
) != 0)
19262 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19263 xfree (canon_name
);
19270 /* Get name of a die, return NULL if not found.
19271 Anonymous namespaces are converted to their magic string. */
19273 static const char *
19274 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19276 struct attribute
*attr
;
19278 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19279 if ((!attr
|| !DW_STRING (attr
))
19280 && die
->tag
!= DW_TAG_namespace
19281 && die
->tag
!= DW_TAG_class_type
19282 && die
->tag
!= DW_TAG_interface_type
19283 && die
->tag
!= DW_TAG_structure_type
19284 && die
->tag
!= DW_TAG_union_type
)
19289 case DW_TAG_compile_unit
:
19290 case DW_TAG_partial_unit
:
19291 /* Compilation units have a DW_AT_name that is a filename, not
19292 a source language identifier. */
19293 case DW_TAG_enumeration_type
:
19294 case DW_TAG_enumerator
:
19295 /* These tags always have simple identifiers already; no need
19296 to canonicalize them. */
19297 return DW_STRING (attr
);
19299 case DW_TAG_namespace
:
19300 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19301 return DW_STRING (attr
);
19302 return CP_ANONYMOUS_NAMESPACE_STR
;
19304 case DW_TAG_subprogram
:
19305 /* Java constructors will all be named "<init>", so return
19306 the class name when we see this special case. */
19307 if (cu
->language
== language_java
19308 && DW_STRING (attr
) != NULL
19309 && strcmp (DW_STRING (attr
), "<init>") == 0)
19311 struct dwarf2_cu
*spec_cu
= cu
;
19312 struct die_info
*spec_die
;
19314 /* GCJ will output '<init>' for Java constructor names.
19315 For this special case, return the name of the parent class. */
19317 /* GCJ may output subprogram DIEs with AT_specification set.
19318 If so, use the name of the specified DIE. */
19319 spec_die
= die_specification (die
, &spec_cu
);
19320 if (spec_die
!= NULL
)
19321 return dwarf2_name (spec_die
, spec_cu
);
19326 if (die
->tag
== DW_TAG_class_type
)
19327 return dwarf2_name (die
, cu
);
19329 while (die
->tag
!= DW_TAG_compile_unit
19330 && die
->tag
!= DW_TAG_partial_unit
);
19334 case DW_TAG_class_type
:
19335 case DW_TAG_interface_type
:
19336 case DW_TAG_structure_type
:
19337 case DW_TAG_union_type
:
19338 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19339 structures or unions. These were of the form "._%d" in GCC 4.1,
19340 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19341 and GCC 4.4. We work around this problem by ignoring these. */
19342 if (attr
&& DW_STRING (attr
)
19343 && (startswith (DW_STRING (attr
), "._")
19344 || startswith (DW_STRING (attr
), "<anonymous")))
19347 /* GCC might emit a nameless typedef that has a linkage name. See
19348 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19349 if (!attr
|| DW_STRING (attr
) == NULL
)
19351 char *demangled
= NULL
;
19353 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19355 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19357 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19360 /* Avoid demangling DW_STRING (attr) the second time on a second
19361 call for the same DIE. */
19362 if (!DW_STRING_IS_CANONICAL (attr
))
19363 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19369 /* FIXME: we already did this for the partial symbol... */
19371 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19372 demangled
, strlen (demangled
));
19373 DW_STRING_IS_CANONICAL (attr
) = 1;
19376 /* Strip any leading namespaces/classes, keep only the base name.
19377 DW_AT_name for named DIEs does not contain the prefixes. */
19378 base
= strrchr (DW_STRING (attr
), ':');
19379 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19382 return DW_STRING (attr
);
19391 if (!DW_STRING_IS_CANONICAL (attr
))
19394 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19395 &cu
->objfile
->per_bfd
->storage_obstack
);
19396 DW_STRING_IS_CANONICAL (attr
) = 1;
19398 return DW_STRING (attr
);
19401 /* Return the die that this die in an extension of, or NULL if there
19402 is none. *EXT_CU is the CU containing DIE on input, and the CU
19403 containing the return value on output. */
19405 static struct die_info
*
19406 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19408 struct attribute
*attr
;
19410 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19414 return follow_die_ref (die
, attr
, ext_cu
);
19417 /* Convert a DIE tag into its string name. */
19419 static const char *
19420 dwarf_tag_name (unsigned tag
)
19422 const char *name
= get_DW_TAG_name (tag
);
19425 return "DW_TAG_<unknown>";
19430 /* Convert a DWARF attribute code into its string name. */
19432 static const char *
19433 dwarf_attr_name (unsigned attr
)
19437 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19438 if (attr
== DW_AT_MIPS_fde
)
19439 return "DW_AT_MIPS_fde";
19441 if (attr
== DW_AT_HP_block_index
)
19442 return "DW_AT_HP_block_index";
19445 name
= get_DW_AT_name (attr
);
19448 return "DW_AT_<unknown>";
19453 /* Convert a DWARF value form code into its string name. */
19455 static const char *
19456 dwarf_form_name (unsigned form
)
19458 const char *name
= get_DW_FORM_name (form
);
19461 return "DW_FORM_<unknown>";
19467 dwarf_bool_name (unsigned mybool
)
19475 /* Convert a DWARF type code into its string name. */
19477 static const char *
19478 dwarf_type_encoding_name (unsigned enc
)
19480 const char *name
= get_DW_ATE_name (enc
);
19483 return "DW_ATE_<unknown>";
19489 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19493 print_spaces (indent
, f
);
19494 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19495 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19497 if (die
->parent
!= NULL
)
19499 print_spaces (indent
, f
);
19500 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19501 die
->parent
->offset
.sect_off
);
19504 print_spaces (indent
, f
);
19505 fprintf_unfiltered (f
, " has children: %s\n",
19506 dwarf_bool_name (die
->child
!= NULL
));
19508 print_spaces (indent
, f
);
19509 fprintf_unfiltered (f
, " attributes:\n");
19511 for (i
= 0; i
< die
->num_attrs
; ++i
)
19513 print_spaces (indent
, f
);
19514 fprintf_unfiltered (f
, " %s (%s) ",
19515 dwarf_attr_name (die
->attrs
[i
].name
),
19516 dwarf_form_name (die
->attrs
[i
].form
));
19518 switch (die
->attrs
[i
].form
)
19521 case DW_FORM_GNU_addr_index
:
19522 fprintf_unfiltered (f
, "address: ");
19523 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19525 case DW_FORM_block2
:
19526 case DW_FORM_block4
:
19527 case DW_FORM_block
:
19528 case DW_FORM_block1
:
19529 fprintf_unfiltered (f
, "block: size %s",
19530 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19532 case DW_FORM_exprloc
:
19533 fprintf_unfiltered (f
, "expression: size %s",
19534 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19536 case DW_FORM_ref_addr
:
19537 fprintf_unfiltered (f
, "ref address: ");
19538 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19540 case DW_FORM_GNU_ref_alt
:
19541 fprintf_unfiltered (f
, "alt ref address: ");
19542 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19548 case DW_FORM_ref_udata
:
19549 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19550 (long) (DW_UNSND (&die
->attrs
[i
])));
19552 case DW_FORM_data1
:
19553 case DW_FORM_data2
:
19554 case DW_FORM_data4
:
19555 case DW_FORM_data8
:
19556 case DW_FORM_udata
:
19557 case DW_FORM_sdata
:
19558 fprintf_unfiltered (f
, "constant: %s",
19559 pulongest (DW_UNSND (&die
->attrs
[i
])));
19561 case DW_FORM_sec_offset
:
19562 fprintf_unfiltered (f
, "section offset: %s",
19563 pulongest (DW_UNSND (&die
->attrs
[i
])));
19565 case DW_FORM_ref_sig8
:
19566 fprintf_unfiltered (f
, "signature: %s",
19567 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19569 case DW_FORM_string
:
19571 case DW_FORM_GNU_str_index
:
19572 case DW_FORM_GNU_strp_alt
:
19573 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19574 DW_STRING (&die
->attrs
[i
])
19575 ? DW_STRING (&die
->attrs
[i
]) : "",
19576 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19579 if (DW_UNSND (&die
->attrs
[i
]))
19580 fprintf_unfiltered (f
, "flag: TRUE");
19582 fprintf_unfiltered (f
, "flag: FALSE");
19584 case DW_FORM_flag_present
:
19585 fprintf_unfiltered (f
, "flag: TRUE");
19587 case DW_FORM_indirect
:
19588 /* The reader will have reduced the indirect form to
19589 the "base form" so this form should not occur. */
19590 fprintf_unfiltered (f
,
19591 "unexpected attribute form: DW_FORM_indirect");
19594 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19595 die
->attrs
[i
].form
);
19598 fprintf_unfiltered (f
, "\n");
19603 dump_die_for_error (struct die_info
*die
)
19605 dump_die_shallow (gdb_stderr
, 0, die
);
19609 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19611 int indent
= level
* 4;
19613 gdb_assert (die
!= NULL
);
19615 if (level
>= max_level
)
19618 dump_die_shallow (f
, indent
, die
);
19620 if (die
->child
!= NULL
)
19622 print_spaces (indent
, f
);
19623 fprintf_unfiltered (f
, " Children:");
19624 if (level
+ 1 < max_level
)
19626 fprintf_unfiltered (f
, "\n");
19627 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19631 fprintf_unfiltered (f
,
19632 " [not printed, max nesting level reached]\n");
19636 if (die
->sibling
!= NULL
&& level
> 0)
19638 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19642 /* This is called from the pdie macro in gdbinit.in.
19643 It's not static so gcc will keep a copy callable from gdb. */
19646 dump_die (struct die_info
*die
, int max_level
)
19648 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19652 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19656 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19662 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19666 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19668 sect_offset retval
= { DW_UNSND (attr
) };
19670 if (attr_form_is_ref (attr
))
19673 retval
.sect_off
= 0;
19674 complaint (&symfile_complaints
,
19675 _("unsupported die ref attribute form: '%s'"),
19676 dwarf_form_name (attr
->form
));
19680 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19681 * the value held by the attribute is not constant. */
19684 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19686 if (attr
->form
== DW_FORM_sdata
)
19687 return DW_SND (attr
);
19688 else if (attr
->form
== DW_FORM_udata
19689 || attr
->form
== DW_FORM_data1
19690 || attr
->form
== DW_FORM_data2
19691 || attr
->form
== DW_FORM_data4
19692 || attr
->form
== DW_FORM_data8
)
19693 return DW_UNSND (attr
);
19696 complaint (&symfile_complaints
,
19697 _("Attribute value is not a constant (%s)"),
19698 dwarf_form_name (attr
->form
));
19699 return default_value
;
19703 /* Follow reference or signature attribute ATTR of SRC_DIE.
19704 On entry *REF_CU is the CU of SRC_DIE.
19705 On exit *REF_CU is the CU of the result. */
19707 static struct die_info
*
19708 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19709 struct dwarf2_cu
**ref_cu
)
19711 struct die_info
*die
;
19713 if (attr_form_is_ref (attr
))
19714 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19715 else if (attr
->form
== DW_FORM_ref_sig8
)
19716 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19719 dump_die_for_error (src_die
);
19720 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19721 objfile_name ((*ref_cu
)->objfile
));
19727 /* Follow reference OFFSET.
19728 On entry *REF_CU is the CU of the source die referencing OFFSET.
19729 On exit *REF_CU is the CU of the result.
19730 Returns NULL if OFFSET is invalid. */
19732 static struct die_info
*
19733 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19734 struct dwarf2_cu
**ref_cu
)
19736 struct die_info temp_die
;
19737 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19739 gdb_assert (cu
->per_cu
!= NULL
);
19743 if (cu
->per_cu
->is_debug_types
)
19745 /* .debug_types CUs cannot reference anything outside their CU.
19746 If they need to, they have to reference a signatured type via
19747 DW_FORM_ref_sig8. */
19748 if (! offset_in_cu_p (&cu
->header
, offset
))
19751 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19752 || ! offset_in_cu_p (&cu
->header
, offset
))
19754 struct dwarf2_per_cu_data
*per_cu
;
19756 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19759 /* If necessary, add it to the queue and load its DIEs. */
19760 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19761 load_full_comp_unit (per_cu
, cu
->language
);
19763 target_cu
= per_cu
->cu
;
19765 else if (cu
->dies
== NULL
)
19767 /* We're loading full DIEs during partial symbol reading. */
19768 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19769 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19772 *ref_cu
= target_cu
;
19773 temp_die
.offset
= offset
;
19774 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19777 /* Follow reference attribute ATTR of SRC_DIE.
19778 On entry *REF_CU is the CU of SRC_DIE.
19779 On exit *REF_CU is the CU of the result. */
19781 static struct die_info
*
19782 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19783 struct dwarf2_cu
**ref_cu
)
19785 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19786 struct dwarf2_cu
*cu
= *ref_cu
;
19787 struct die_info
*die
;
19789 die
= follow_die_offset (offset
,
19790 (attr
->form
== DW_FORM_GNU_ref_alt
19791 || cu
->per_cu
->is_dwz
),
19794 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19795 "at 0x%x [in module %s]"),
19796 offset
.sect_off
, src_die
->offset
.sect_off
,
19797 objfile_name (cu
->objfile
));
19802 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19803 Returned value is intended for DW_OP_call*. Returned
19804 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19806 struct dwarf2_locexpr_baton
19807 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19808 struct dwarf2_per_cu_data
*per_cu
,
19809 CORE_ADDR (*get_frame_pc
) (void *baton
),
19812 struct dwarf2_cu
*cu
;
19813 struct die_info
*die
;
19814 struct attribute
*attr
;
19815 struct dwarf2_locexpr_baton retval
;
19817 dw2_setup (per_cu
->objfile
);
19819 if (per_cu
->cu
== NULL
)
19823 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19825 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19826 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19828 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19831 /* DWARF: "If there is no such attribute, then there is no effect.".
19832 DATA is ignored if SIZE is 0. */
19834 retval
.data
= NULL
;
19837 else if (attr_form_is_section_offset (attr
))
19839 struct dwarf2_loclist_baton loclist_baton
;
19840 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19843 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19845 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19847 retval
.size
= size
;
19851 if (!attr_form_is_block (attr
))
19852 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19853 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19854 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19856 retval
.data
= DW_BLOCK (attr
)->data
;
19857 retval
.size
= DW_BLOCK (attr
)->size
;
19859 retval
.per_cu
= cu
->per_cu
;
19861 age_cached_comp_units ();
19866 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19869 struct dwarf2_locexpr_baton
19870 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19871 struct dwarf2_per_cu_data
*per_cu
,
19872 CORE_ADDR (*get_frame_pc
) (void *baton
),
19875 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19877 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19880 /* Write a constant of a given type as target-ordered bytes into
19883 static const gdb_byte
*
19884 write_constant_as_bytes (struct obstack
*obstack
,
19885 enum bfd_endian byte_order
,
19892 *len
= TYPE_LENGTH (type
);
19893 result
= obstack_alloc (obstack
, *len
);
19894 store_unsigned_integer (result
, *len
, byte_order
, value
);
19899 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19900 pointer to the constant bytes and set LEN to the length of the
19901 data. If memory is needed, allocate it on OBSTACK. If the DIE
19902 does not have a DW_AT_const_value, return NULL. */
19905 dwarf2_fetch_constant_bytes (sect_offset offset
,
19906 struct dwarf2_per_cu_data
*per_cu
,
19907 struct obstack
*obstack
,
19910 struct dwarf2_cu
*cu
;
19911 struct die_info
*die
;
19912 struct attribute
*attr
;
19913 const gdb_byte
*result
= NULL
;
19916 enum bfd_endian byte_order
;
19918 dw2_setup (per_cu
->objfile
);
19920 if (per_cu
->cu
== NULL
)
19924 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19926 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19927 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19930 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19934 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19935 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19937 switch (attr
->form
)
19940 case DW_FORM_GNU_addr_index
:
19944 *len
= cu
->header
.addr_size
;
19945 tem
= obstack_alloc (obstack
, *len
);
19946 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19950 case DW_FORM_string
:
19952 case DW_FORM_GNU_str_index
:
19953 case DW_FORM_GNU_strp_alt
:
19954 /* DW_STRING is already allocated on the objfile obstack, point
19956 result
= (const gdb_byte
*) DW_STRING (attr
);
19957 *len
= strlen (DW_STRING (attr
));
19959 case DW_FORM_block1
:
19960 case DW_FORM_block2
:
19961 case DW_FORM_block4
:
19962 case DW_FORM_block
:
19963 case DW_FORM_exprloc
:
19964 result
= DW_BLOCK (attr
)->data
;
19965 *len
= DW_BLOCK (attr
)->size
;
19968 /* The DW_AT_const_value attributes are supposed to carry the
19969 symbol's value "represented as it would be on the target
19970 architecture." By the time we get here, it's already been
19971 converted to host endianness, so we just need to sign- or
19972 zero-extend it as appropriate. */
19973 case DW_FORM_data1
:
19974 type
= die_type (die
, cu
);
19975 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
19976 if (result
== NULL
)
19977 result
= write_constant_as_bytes (obstack
, byte_order
,
19980 case DW_FORM_data2
:
19981 type
= die_type (die
, cu
);
19982 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
19983 if (result
== NULL
)
19984 result
= write_constant_as_bytes (obstack
, byte_order
,
19987 case DW_FORM_data4
:
19988 type
= die_type (die
, cu
);
19989 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
19990 if (result
== NULL
)
19991 result
= write_constant_as_bytes (obstack
, byte_order
,
19994 case DW_FORM_data8
:
19995 type
= die_type (die
, cu
);
19996 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
19997 if (result
== NULL
)
19998 result
= write_constant_as_bytes (obstack
, byte_order
,
20002 case DW_FORM_sdata
:
20003 type
= die_type (die
, cu
);
20004 result
= write_constant_as_bytes (obstack
, byte_order
,
20005 type
, DW_SND (attr
), len
);
20008 case DW_FORM_udata
:
20009 type
= die_type (die
, cu
);
20010 result
= write_constant_as_bytes (obstack
, byte_order
,
20011 type
, DW_UNSND (attr
), len
);
20015 complaint (&symfile_complaints
,
20016 _("unsupported const value attribute form: '%s'"),
20017 dwarf_form_name (attr
->form
));
20024 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20028 dwarf2_get_die_type (cu_offset die_offset
,
20029 struct dwarf2_per_cu_data
*per_cu
)
20031 sect_offset die_offset_sect
;
20033 dw2_setup (per_cu
->objfile
);
20035 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20036 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20039 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20040 On entry *REF_CU is the CU of SRC_DIE.
20041 On exit *REF_CU is the CU of the result.
20042 Returns NULL if the referenced DIE isn't found. */
20044 static struct die_info
*
20045 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20046 struct dwarf2_cu
**ref_cu
)
20048 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20049 struct die_info temp_die
;
20050 struct dwarf2_cu
*sig_cu
;
20051 struct die_info
*die
;
20053 /* While it might be nice to assert sig_type->type == NULL here,
20054 we can get here for DW_AT_imported_declaration where we need
20055 the DIE not the type. */
20057 /* If necessary, add it to the queue and load its DIEs. */
20059 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20060 read_signatured_type (sig_type
);
20062 sig_cu
= sig_type
->per_cu
.cu
;
20063 gdb_assert (sig_cu
!= NULL
);
20064 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20065 temp_die
.offset
= sig_type
->type_offset_in_section
;
20066 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20067 temp_die
.offset
.sect_off
);
20070 /* For .gdb_index version 7 keep track of included TUs.
20071 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20072 if (dwarf2_per_objfile
->index_table
!= NULL
20073 && dwarf2_per_objfile
->index_table
->version
<= 7)
20075 VEC_safe_push (dwarf2_per_cu_ptr
,
20076 (*ref_cu
)->per_cu
->imported_symtabs
,
20087 /* Follow signatured type referenced by ATTR in SRC_DIE.
20088 On entry *REF_CU is the CU of SRC_DIE.
20089 On exit *REF_CU is the CU of the result.
20090 The result is the DIE of the type.
20091 If the referenced type cannot be found an error is thrown. */
20093 static struct die_info
*
20094 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20095 struct dwarf2_cu
**ref_cu
)
20097 ULONGEST signature
= DW_SIGNATURE (attr
);
20098 struct signatured_type
*sig_type
;
20099 struct die_info
*die
;
20101 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20103 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20104 /* sig_type will be NULL if the signatured type is missing from
20106 if (sig_type
== NULL
)
20108 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20109 " from DIE at 0x%x [in module %s]"),
20110 hex_string (signature
), src_die
->offset
.sect_off
,
20111 objfile_name ((*ref_cu
)->objfile
));
20114 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20117 dump_die_for_error (src_die
);
20118 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20119 " from DIE at 0x%x [in module %s]"),
20120 hex_string (signature
), src_die
->offset
.sect_off
,
20121 objfile_name ((*ref_cu
)->objfile
));
20127 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20128 reading in and processing the type unit if necessary. */
20130 static struct type
*
20131 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20132 struct dwarf2_cu
*cu
)
20134 struct signatured_type
*sig_type
;
20135 struct dwarf2_cu
*type_cu
;
20136 struct die_info
*type_die
;
20139 sig_type
= lookup_signatured_type (cu
, signature
);
20140 /* sig_type will be NULL if the signatured type is missing from
20142 if (sig_type
== NULL
)
20144 complaint (&symfile_complaints
,
20145 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20146 " from DIE at 0x%x [in module %s]"),
20147 hex_string (signature
), die
->offset
.sect_off
,
20148 objfile_name (dwarf2_per_objfile
->objfile
));
20149 return build_error_marker_type (cu
, die
);
20152 /* If we already know the type we're done. */
20153 if (sig_type
->type
!= NULL
)
20154 return sig_type
->type
;
20157 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20158 if (type_die
!= NULL
)
20160 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20161 is created. This is important, for example, because for c++ classes
20162 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20163 type
= read_type_die (type_die
, type_cu
);
20166 complaint (&symfile_complaints
,
20167 _("Dwarf Error: Cannot build signatured type %s"
20168 " referenced from DIE at 0x%x [in module %s]"),
20169 hex_string (signature
), die
->offset
.sect_off
,
20170 objfile_name (dwarf2_per_objfile
->objfile
));
20171 type
= build_error_marker_type (cu
, die
);
20176 complaint (&symfile_complaints
,
20177 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20178 " from DIE at 0x%x [in module %s]"),
20179 hex_string (signature
), die
->offset
.sect_off
,
20180 objfile_name (dwarf2_per_objfile
->objfile
));
20181 type
= build_error_marker_type (cu
, die
);
20183 sig_type
->type
= type
;
20188 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20189 reading in and processing the type unit if necessary. */
20191 static struct type
*
20192 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20193 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20195 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20196 if (attr_form_is_ref (attr
))
20198 struct dwarf2_cu
*type_cu
= cu
;
20199 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20201 return read_type_die (type_die
, type_cu
);
20203 else if (attr
->form
== DW_FORM_ref_sig8
)
20205 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20209 complaint (&symfile_complaints
,
20210 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20211 " at 0x%x [in module %s]"),
20212 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20213 objfile_name (dwarf2_per_objfile
->objfile
));
20214 return build_error_marker_type (cu
, die
);
20218 /* Load the DIEs associated with type unit PER_CU into memory. */
20221 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20223 struct signatured_type
*sig_type
;
20225 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20226 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20228 /* We have the per_cu, but we need the signatured_type.
20229 Fortunately this is an easy translation. */
20230 gdb_assert (per_cu
->is_debug_types
);
20231 sig_type
= (struct signatured_type
*) per_cu
;
20233 gdb_assert (per_cu
->cu
== NULL
);
20235 read_signatured_type (sig_type
);
20237 gdb_assert (per_cu
->cu
!= NULL
);
20240 /* die_reader_func for read_signatured_type.
20241 This is identical to load_full_comp_unit_reader,
20242 but is kept separate for now. */
20245 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20246 const gdb_byte
*info_ptr
,
20247 struct die_info
*comp_unit_die
,
20251 struct dwarf2_cu
*cu
= reader
->cu
;
20253 gdb_assert (cu
->die_hash
== NULL
);
20255 htab_create_alloc_ex (cu
->header
.length
/ 12,
20259 &cu
->comp_unit_obstack
,
20260 hashtab_obstack_allocate
,
20261 dummy_obstack_deallocate
);
20264 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20265 &info_ptr
, comp_unit_die
);
20266 cu
->dies
= comp_unit_die
;
20267 /* comp_unit_die is not stored in die_hash, no need. */
20269 /* We try not to read any attributes in this function, because not
20270 all CUs needed for references have been loaded yet, and symbol
20271 table processing isn't initialized. But we have to set the CU language,
20272 or we won't be able to build types correctly.
20273 Similarly, if we do not read the producer, we can not apply
20274 producer-specific interpretation. */
20275 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20278 /* Read in a signatured type and build its CU and DIEs.
20279 If the type is a stub for the real type in a DWO file,
20280 read in the real type from the DWO file as well. */
20283 read_signatured_type (struct signatured_type
*sig_type
)
20285 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20287 gdb_assert (per_cu
->is_debug_types
);
20288 gdb_assert (per_cu
->cu
== NULL
);
20290 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20291 read_signatured_type_reader
, NULL
);
20292 sig_type
->per_cu
.tu_read
= 1;
20295 /* Decode simple location descriptions.
20296 Given a pointer to a dwarf block that defines a location, compute
20297 the location and return the value.
20299 NOTE drow/2003-11-18: This function is called in two situations
20300 now: for the address of static or global variables (partial symbols
20301 only) and for offsets into structures which are expected to be
20302 (more or less) constant. The partial symbol case should go away,
20303 and only the constant case should remain. That will let this
20304 function complain more accurately. A few special modes are allowed
20305 without complaint for global variables (for instance, global
20306 register values and thread-local values).
20308 A location description containing no operations indicates that the
20309 object is optimized out. The return value is 0 for that case.
20310 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20311 callers will only want a very basic result and this can become a
20314 Note that stack[0] is unused except as a default error return. */
20317 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20319 struct objfile
*objfile
= cu
->objfile
;
20321 size_t size
= blk
->size
;
20322 const gdb_byte
*data
= blk
->data
;
20323 CORE_ADDR stack
[64];
20325 unsigned int bytes_read
, unsnd
;
20331 stack
[++stacki
] = 0;
20370 stack
[++stacki
] = op
- DW_OP_lit0
;
20405 stack
[++stacki
] = op
- DW_OP_reg0
;
20407 dwarf2_complex_location_expr_complaint ();
20411 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20413 stack
[++stacki
] = unsnd
;
20415 dwarf2_complex_location_expr_complaint ();
20419 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20424 case DW_OP_const1u
:
20425 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20429 case DW_OP_const1s
:
20430 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20434 case DW_OP_const2u
:
20435 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20439 case DW_OP_const2s
:
20440 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20444 case DW_OP_const4u
:
20445 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20449 case DW_OP_const4s
:
20450 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20454 case DW_OP_const8u
:
20455 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20460 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20466 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20471 stack
[stacki
+ 1] = stack
[stacki
];
20476 stack
[stacki
- 1] += stack
[stacki
];
20480 case DW_OP_plus_uconst
:
20481 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20487 stack
[stacki
- 1] -= stack
[stacki
];
20492 /* If we're not the last op, then we definitely can't encode
20493 this using GDB's address_class enum. This is valid for partial
20494 global symbols, although the variable's address will be bogus
20497 dwarf2_complex_location_expr_complaint ();
20500 case DW_OP_GNU_push_tls_address
:
20501 /* The top of the stack has the offset from the beginning
20502 of the thread control block at which the variable is located. */
20503 /* Nothing should follow this operator, so the top of stack would
20505 /* This is valid for partial global symbols, but the variable's
20506 address will be bogus in the psymtab. Make it always at least
20507 non-zero to not look as a variable garbage collected by linker
20508 which have DW_OP_addr 0. */
20510 dwarf2_complex_location_expr_complaint ();
20514 case DW_OP_GNU_uninit
:
20517 case DW_OP_GNU_addr_index
:
20518 case DW_OP_GNU_const_index
:
20519 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20526 const char *name
= get_DW_OP_name (op
);
20529 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20532 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20536 return (stack
[stacki
]);
20539 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20540 outside of the allocated space. Also enforce minimum>0. */
20541 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20543 complaint (&symfile_complaints
,
20544 _("location description stack overflow"));
20550 complaint (&symfile_complaints
,
20551 _("location description stack underflow"));
20555 return (stack
[stacki
]);
20558 /* memory allocation interface */
20560 static struct dwarf_block
*
20561 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20563 struct dwarf_block
*blk
;
20565 blk
= (struct dwarf_block
*)
20566 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20570 static struct die_info
*
20571 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20573 struct die_info
*die
;
20574 size_t size
= sizeof (struct die_info
);
20577 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20579 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20580 memset (die
, 0, sizeof (struct die_info
));
20585 /* Macro support. */
20587 /* Return file name relative to the compilation directory of file number I in
20588 *LH's file name table. The result is allocated using xmalloc; the caller is
20589 responsible for freeing it. */
20592 file_file_name (int file
, struct line_header
*lh
)
20594 /* Is the file number a valid index into the line header's file name
20595 table? Remember that file numbers start with one, not zero. */
20596 if (1 <= file
&& file
<= lh
->num_file_names
)
20598 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20600 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
20601 return xstrdup (fe
->name
);
20602 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20607 /* The compiler produced a bogus file number. We can at least
20608 record the macro definitions made in the file, even if we
20609 won't be able to find the file by name. */
20610 char fake_name
[80];
20612 xsnprintf (fake_name
, sizeof (fake_name
),
20613 "<bad macro file number %d>", file
);
20615 complaint (&symfile_complaints
,
20616 _("bad file number in macro information (%d)"),
20619 return xstrdup (fake_name
);
20623 /* Return the full name of file number I in *LH's file name table.
20624 Use COMP_DIR as the name of the current directory of the
20625 compilation. The result is allocated using xmalloc; the caller is
20626 responsible for freeing it. */
20628 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20630 /* Is the file number a valid index into the line header's file name
20631 table? Remember that file numbers start with one, not zero. */
20632 if (1 <= file
&& file
<= lh
->num_file_names
)
20634 char *relative
= file_file_name (file
, lh
);
20636 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20638 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20641 return file_file_name (file
, lh
);
20645 static struct macro_source_file
*
20646 macro_start_file (int file
, int line
,
20647 struct macro_source_file
*current_file
,
20648 struct line_header
*lh
)
20650 /* File name relative to the compilation directory of this source file. */
20651 char *file_name
= file_file_name (file
, lh
);
20653 if (! current_file
)
20655 /* Note: We don't create a macro table for this compilation unit
20656 at all until we actually get a filename. */
20657 struct macro_table
*macro_table
= get_macro_table ();
20659 /* If we have no current file, then this must be the start_file
20660 directive for the compilation unit's main source file. */
20661 current_file
= macro_set_main (macro_table
, file_name
);
20662 macro_define_special (macro_table
);
20665 current_file
= macro_include (current_file
, line
, file_name
);
20669 return current_file
;
20673 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20674 followed by a null byte. */
20676 copy_string (const char *buf
, int len
)
20678 char *s
= xmalloc (len
+ 1);
20680 memcpy (s
, buf
, len
);
20686 static const char *
20687 consume_improper_spaces (const char *p
, const char *body
)
20691 complaint (&symfile_complaints
,
20692 _("macro definition contains spaces "
20693 "in formal argument list:\n`%s'"),
20705 parse_macro_definition (struct macro_source_file
*file
, int line
,
20710 /* The body string takes one of two forms. For object-like macro
20711 definitions, it should be:
20713 <macro name> " " <definition>
20715 For function-like macro definitions, it should be:
20717 <macro name> "() " <definition>
20719 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20721 Spaces may appear only where explicitly indicated, and in the
20724 The Dwarf 2 spec says that an object-like macro's name is always
20725 followed by a space, but versions of GCC around March 2002 omit
20726 the space when the macro's definition is the empty string.
20728 The Dwarf 2 spec says that there should be no spaces between the
20729 formal arguments in a function-like macro's formal argument list,
20730 but versions of GCC around March 2002 include spaces after the
20734 /* Find the extent of the macro name. The macro name is terminated
20735 by either a space or null character (for an object-like macro) or
20736 an opening paren (for a function-like macro). */
20737 for (p
= body
; *p
; p
++)
20738 if (*p
== ' ' || *p
== '(')
20741 if (*p
== ' ' || *p
== '\0')
20743 /* It's an object-like macro. */
20744 int name_len
= p
- body
;
20745 char *name
= copy_string (body
, name_len
);
20746 const char *replacement
;
20749 replacement
= body
+ name_len
+ 1;
20752 dwarf2_macro_malformed_definition_complaint (body
);
20753 replacement
= body
+ name_len
;
20756 macro_define_object (file
, line
, name
, replacement
);
20760 else if (*p
== '(')
20762 /* It's a function-like macro. */
20763 char *name
= copy_string (body
, p
- body
);
20766 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20770 p
= consume_improper_spaces (p
, body
);
20772 /* Parse the formal argument list. */
20773 while (*p
&& *p
!= ')')
20775 /* Find the extent of the current argument name. */
20776 const char *arg_start
= p
;
20778 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20781 if (! *p
|| p
== arg_start
)
20782 dwarf2_macro_malformed_definition_complaint (body
);
20785 /* Make sure argv has room for the new argument. */
20786 if (argc
>= argv_size
)
20789 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20792 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20795 p
= consume_improper_spaces (p
, body
);
20797 /* Consume the comma, if present. */
20802 p
= consume_improper_spaces (p
, body
);
20811 /* Perfectly formed definition, no complaints. */
20812 macro_define_function (file
, line
, name
,
20813 argc
, (const char **) argv
,
20815 else if (*p
== '\0')
20817 /* Complain, but do define it. */
20818 dwarf2_macro_malformed_definition_complaint (body
);
20819 macro_define_function (file
, line
, name
,
20820 argc
, (const char **) argv
,
20824 /* Just complain. */
20825 dwarf2_macro_malformed_definition_complaint (body
);
20828 /* Just complain. */
20829 dwarf2_macro_malformed_definition_complaint (body
);
20835 for (i
= 0; i
< argc
; i
++)
20841 dwarf2_macro_malformed_definition_complaint (body
);
20844 /* Skip some bytes from BYTES according to the form given in FORM.
20845 Returns the new pointer. */
20847 static const gdb_byte
*
20848 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20849 enum dwarf_form form
,
20850 unsigned int offset_size
,
20851 struct dwarf2_section_info
*section
)
20853 unsigned int bytes_read
;
20857 case DW_FORM_data1
:
20862 case DW_FORM_data2
:
20866 case DW_FORM_data4
:
20870 case DW_FORM_data8
:
20874 case DW_FORM_string
:
20875 read_direct_string (abfd
, bytes
, &bytes_read
);
20876 bytes
+= bytes_read
;
20879 case DW_FORM_sec_offset
:
20881 case DW_FORM_GNU_strp_alt
:
20882 bytes
+= offset_size
;
20885 case DW_FORM_block
:
20886 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20887 bytes
+= bytes_read
;
20890 case DW_FORM_block1
:
20891 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20893 case DW_FORM_block2
:
20894 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20896 case DW_FORM_block4
:
20897 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20900 case DW_FORM_sdata
:
20901 case DW_FORM_udata
:
20902 case DW_FORM_GNU_addr_index
:
20903 case DW_FORM_GNU_str_index
:
20904 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20907 dwarf2_section_buffer_overflow_complaint (section
);
20915 complaint (&symfile_complaints
,
20916 _("invalid form 0x%x in `%s'"),
20917 form
, get_section_name (section
));
20925 /* A helper for dwarf_decode_macros that handles skipping an unknown
20926 opcode. Returns an updated pointer to the macro data buffer; or,
20927 on error, issues a complaint and returns NULL. */
20929 static const gdb_byte
*
20930 skip_unknown_opcode (unsigned int opcode
,
20931 const gdb_byte
**opcode_definitions
,
20932 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20934 unsigned int offset_size
,
20935 struct dwarf2_section_info
*section
)
20937 unsigned int bytes_read
, i
;
20939 const gdb_byte
*defn
;
20941 if (opcode_definitions
[opcode
] == NULL
)
20943 complaint (&symfile_complaints
,
20944 _("unrecognized DW_MACFINO opcode 0x%x"),
20949 defn
= opcode_definitions
[opcode
];
20950 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20951 defn
+= bytes_read
;
20953 for (i
= 0; i
< arg
; ++i
)
20955 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
20957 if (mac_ptr
== NULL
)
20959 /* skip_form_bytes already issued the complaint. */
20967 /* A helper function which parses the header of a macro section.
20968 If the macro section is the extended (for now called "GNU") type,
20969 then this updates *OFFSET_SIZE. Returns a pointer to just after
20970 the header, or issues a complaint and returns NULL on error. */
20972 static const gdb_byte
*
20973 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
20975 const gdb_byte
*mac_ptr
,
20976 unsigned int *offset_size
,
20977 int section_is_gnu
)
20979 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
20981 if (section_is_gnu
)
20983 unsigned int version
, flags
;
20985 version
= read_2_bytes (abfd
, mac_ptr
);
20988 complaint (&symfile_complaints
,
20989 _("unrecognized version `%d' in .debug_macro section"),
20995 flags
= read_1_byte (abfd
, mac_ptr
);
20997 *offset_size
= (flags
& 1) ? 8 : 4;
20999 if ((flags
& 2) != 0)
21000 /* We don't need the line table offset. */
21001 mac_ptr
+= *offset_size
;
21003 /* Vendor opcode descriptions. */
21004 if ((flags
& 4) != 0)
21006 unsigned int i
, count
;
21008 count
= read_1_byte (abfd
, mac_ptr
);
21010 for (i
= 0; i
< count
; ++i
)
21012 unsigned int opcode
, bytes_read
;
21015 opcode
= read_1_byte (abfd
, mac_ptr
);
21017 opcode_definitions
[opcode
] = mac_ptr
;
21018 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21019 mac_ptr
+= bytes_read
;
21028 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21029 including DW_MACRO_GNU_transparent_include. */
21032 dwarf_decode_macro_bytes (bfd
*abfd
,
21033 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21034 struct macro_source_file
*current_file
,
21035 struct line_header
*lh
,
21036 struct dwarf2_section_info
*section
,
21037 int section_is_gnu
, int section_is_dwz
,
21038 unsigned int offset_size
,
21039 htab_t include_hash
)
21041 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21042 enum dwarf_macro_record_type macinfo_type
;
21043 int at_commandline
;
21044 const gdb_byte
*opcode_definitions
[256];
21046 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21047 &offset_size
, section_is_gnu
);
21048 if (mac_ptr
== NULL
)
21050 /* We already issued a complaint. */
21054 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21055 GDB is still reading the definitions from command line. First
21056 DW_MACINFO_start_file will need to be ignored as it was already executed
21057 to create CURRENT_FILE for the main source holding also the command line
21058 definitions. On first met DW_MACINFO_start_file this flag is reset to
21059 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21061 at_commandline
= 1;
21065 /* Do we at least have room for a macinfo type byte? */
21066 if (mac_ptr
>= mac_end
)
21068 dwarf2_section_buffer_overflow_complaint (section
);
21072 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21075 /* Note that we rely on the fact that the corresponding GNU and
21076 DWARF constants are the same. */
21077 switch (macinfo_type
)
21079 /* A zero macinfo type indicates the end of the macro
21084 case DW_MACRO_GNU_define
:
21085 case DW_MACRO_GNU_undef
:
21086 case DW_MACRO_GNU_define_indirect
:
21087 case DW_MACRO_GNU_undef_indirect
:
21088 case DW_MACRO_GNU_define_indirect_alt
:
21089 case DW_MACRO_GNU_undef_indirect_alt
:
21091 unsigned int bytes_read
;
21096 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21097 mac_ptr
+= bytes_read
;
21099 if (macinfo_type
== DW_MACRO_GNU_define
21100 || macinfo_type
== DW_MACRO_GNU_undef
)
21102 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21103 mac_ptr
+= bytes_read
;
21107 LONGEST str_offset
;
21109 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21110 mac_ptr
+= offset_size
;
21112 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21113 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21116 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21118 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21121 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21124 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21125 || macinfo_type
== DW_MACRO_GNU_define_indirect
21126 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21127 if (! current_file
)
21129 /* DWARF violation as no main source is present. */
21130 complaint (&symfile_complaints
,
21131 _("debug info with no main source gives macro %s "
21133 is_define
? _("definition") : _("undefinition"),
21137 if ((line
== 0 && !at_commandline
)
21138 || (line
!= 0 && at_commandline
))
21139 complaint (&symfile_complaints
,
21140 _("debug info gives %s macro %s with %s line %d: %s"),
21141 at_commandline
? _("command-line") : _("in-file"),
21142 is_define
? _("definition") : _("undefinition"),
21143 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21146 parse_macro_definition (current_file
, line
, body
);
21149 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21150 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21151 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21152 macro_undef (current_file
, line
, body
);
21157 case DW_MACRO_GNU_start_file
:
21159 unsigned int bytes_read
;
21162 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21163 mac_ptr
+= bytes_read
;
21164 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21165 mac_ptr
+= bytes_read
;
21167 if ((line
== 0 && !at_commandline
)
21168 || (line
!= 0 && at_commandline
))
21169 complaint (&symfile_complaints
,
21170 _("debug info gives source %d included "
21171 "from %s at %s line %d"),
21172 file
, at_commandline
? _("command-line") : _("file"),
21173 line
== 0 ? _("zero") : _("non-zero"), line
);
21175 if (at_commandline
)
21177 /* This DW_MACRO_GNU_start_file was executed in the
21179 at_commandline
= 0;
21182 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21186 case DW_MACRO_GNU_end_file
:
21187 if (! current_file
)
21188 complaint (&symfile_complaints
,
21189 _("macro debug info has an unmatched "
21190 "`close_file' directive"));
21193 current_file
= current_file
->included_by
;
21194 if (! current_file
)
21196 enum dwarf_macro_record_type next_type
;
21198 /* GCC circa March 2002 doesn't produce the zero
21199 type byte marking the end of the compilation
21200 unit. Complain if it's not there, but exit no
21203 /* Do we at least have room for a macinfo type byte? */
21204 if (mac_ptr
>= mac_end
)
21206 dwarf2_section_buffer_overflow_complaint (section
);
21210 /* We don't increment mac_ptr here, so this is just
21212 next_type
= read_1_byte (abfd
, mac_ptr
);
21213 if (next_type
!= 0)
21214 complaint (&symfile_complaints
,
21215 _("no terminating 0-type entry for "
21216 "macros in `.debug_macinfo' section"));
21223 case DW_MACRO_GNU_transparent_include
:
21224 case DW_MACRO_GNU_transparent_include_alt
:
21228 bfd
*include_bfd
= abfd
;
21229 struct dwarf2_section_info
*include_section
= section
;
21230 struct dwarf2_section_info alt_section
;
21231 const gdb_byte
*include_mac_end
= mac_end
;
21232 int is_dwz
= section_is_dwz
;
21233 const gdb_byte
*new_mac_ptr
;
21235 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21236 mac_ptr
+= offset_size
;
21238 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21240 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21242 dwarf2_read_section (objfile
, &dwz
->macro
);
21244 include_section
= &dwz
->macro
;
21245 include_bfd
= get_section_bfd_owner (include_section
);
21246 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21250 new_mac_ptr
= include_section
->buffer
+ offset
;
21251 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21255 /* This has actually happened; see
21256 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21257 complaint (&symfile_complaints
,
21258 _("recursive DW_MACRO_GNU_transparent_include in "
21259 ".debug_macro section"));
21263 *slot
= (void *) new_mac_ptr
;
21265 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21266 include_mac_end
, current_file
, lh
,
21267 section
, section_is_gnu
, is_dwz
,
21268 offset_size
, include_hash
);
21270 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21275 case DW_MACINFO_vendor_ext
:
21276 if (!section_is_gnu
)
21278 unsigned int bytes_read
;
21281 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21282 mac_ptr
+= bytes_read
;
21283 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21284 mac_ptr
+= bytes_read
;
21286 /* We don't recognize any vendor extensions. */
21292 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21293 mac_ptr
, mac_end
, abfd
, offset_size
,
21295 if (mac_ptr
== NULL
)
21299 } while (macinfo_type
!= 0);
21303 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21304 int section_is_gnu
)
21306 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21307 struct line_header
*lh
= cu
->line_header
;
21309 const gdb_byte
*mac_ptr
, *mac_end
;
21310 struct macro_source_file
*current_file
= 0;
21311 enum dwarf_macro_record_type macinfo_type
;
21312 unsigned int offset_size
= cu
->header
.offset_size
;
21313 const gdb_byte
*opcode_definitions
[256];
21314 struct cleanup
*cleanup
;
21315 htab_t include_hash
;
21317 struct dwarf2_section_info
*section
;
21318 const char *section_name
;
21320 if (cu
->dwo_unit
!= NULL
)
21322 if (section_is_gnu
)
21324 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21325 section_name
= ".debug_macro.dwo";
21329 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21330 section_name
= ".debug_macinfo.dwo";
21335 if (section_is_gnu
)
21337 section
= &dwarf2_per_objfile
->macro
;
21338 section_name
= ".debug_macro";
21342 section
= &dwarf2_per_objfile
->macinfo
;
21343 section_name
= ".debug_macinfo";
21347 dwarf2_read_section (objfile
, section
);
21348 if (section
->buffer
== NULL
)
21350 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21353 abfd
= get_section_bfd_owner (section
);
21355 /* First pass: Find the name of the base filename.
21356 This filename is needed in order to process all macros whose definition
21357 (or undefinition) comes from the command line. These macros are defined
21358 before the first DW_MACINFO_start_file entry, and yet still need to be
21359 associated to the base file.
21361 To determine the base file name, we scan the macro definitions until we
21362 reach the first DW_MACINFO_start_file entry. We then initialize
21363 CURRENT_FILE accordingly so that any macro definition found before the
21364 first DW_MACINFO_start_file can still be associated to the base file. */
21366 mac_ptr
= section
->buffer
+ offset
;
21367 mac_end
= section
->buffer
+ section
->size
;
21369 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21370 &offset_size
, section_is_gnu
);
21371 if (mac_ptr
== NULL
)
21373 /* We already issued a complaint. */
21379 /* Do we at least have room for a macinfo type byte? */
21380 if (mac_ptr
>= mac_end
)
21382 /* Complaint is printed during the second pass as GDB will probably
21383 stop the first pass earlier upon finding
21384 DW_MACINFO_start_file. */
21388 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21391 /* Note that we rely on the fact that the corresponding GNU and
21392 DWARF constants are the same. */
21393 switch (macinfo_type
)
21395 /* A zero macinfo type indicates the end of the macro
21400 case DW_MACRO_GNU_define
:
21401 case DW_MACRO_GNU_undef
:
21402 /* Only skip the data by MAC_PTR. */
21404 unsigned int bytes_read
;
21406 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21407 mac_ptr
+= bytes_read
;
21408 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21409 mac_ptr
+= bytes_read
;
21413 case DW_MACRO_GNU_start_file
:
21415 unsigned int bytes_read
;
21418 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21419 mac_ptr
+= bytes_read
;
21420 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21421 mac_ptr
+= bytes_read
;
21423 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21427 case DW_MACRO_GNU_end_file
:
21428 /* No data to skip by MAC_PTR. */
21431 case DW_MACRO_GNU_define_indirect
:
21432 case DW_MACRO_GNU_undef_indirect
:
21433 case DW_MACRO_GNU_define_indirect_alt
:
21434 case DW_MACRO_GNU_undef_indirect_alt
:
21436 unsigned int bytes_read
;
21438 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21439 mac_ptr
+= bytes_read
;
21440 mac_ptr
+= offset_size
;
21444 case DW_MACRO_GNU_transparent_include
:
21445 case DW_MACRO_GNU_transparent_include_alt
:
21446 /* Note that, according to the spec, a transparent include
21447 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21448 skip this opcode. */
21449 mac_ptr
+= offset_size
;
21452 case DW_MACINFO_vendor_ext
:
21453 /* Only skip the data by MAC_PTR. */
21454 if (!section_is_gnu
)
21456 unsigned int bytes_read
;
21458 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21459 mac_ptr
+= bytes_read
;
21460 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21461 mac_ptr
+= bytes_read
;
21466 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21467 mac_ptr
, mac_end
, abfd
, offset_size
,
21469 if (mac_ptr
== NULL
)
21473 } while (macinfo_type
!= 0 && current_file
== NULL
);
21475 /* Second pass: Process all entries.
21477 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21478 command-line macro definitions/undefinitions. This flag is unset when we
21479 reach the first DW_MACINFO_start_file entry. */
21481 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21482 NULL
, xcalloc
, xfree
);
21483 cleanup
= make_cleanup_htab_delete (include_hash
);
21484 mac_ptr
= section
->buffer
+ offset
;
21485 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21486 *slot
= (void *) mac_ptr
;
21487 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21488 current_file
, lh
, section
,
21489 section_is_gnu
, 0, offset_size
, include_hash
);
21490 do_cleanups (cleanup
);
21493 /* Check if the attribute's form is a DW_FORM_block*
21494 if so return true else false. */
21497 attr_form_is_block (const struct attribute
*attr
)
21499 return (attr
== NULL
? 0 :
21500 attr
->form
== DW_FORM_block1
21501 || attr
->form
== DW_FORM_block2
21502 || attr
->form
== DW_FORM_block4
21503 || attr
->form
== DW_FORM_block
21504 || attr
->form
== DW_FORM_exprloc
);
21507 /* Return non-zero if ATTR's value is a section offset --- classes
21508 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21509 You may use DW_UNSND (attr) to retrieve such offsets.
21511 Section 7.5.4, "Attribute Encodings", explains that no attribute
21512 may have a value that belongs to more than one of these classes; it
21513 would be ambiguous if we did, because we use the same forms for all
21517 attr_form_is_section_offset (const struct attribute
*attr
)
21519 return (attr
->form
== DW_FORM_data4
21520 || attr
->form
== DW_FORM_data8
21521 || attr
->form
== DW_FORM_sec_offset
);
21524 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21525 zero otherwise. When this function returns true, you can apply
21526 dwarf2_get_attr_constant_value to it.
21528 However, note that for some attributes you must check
21529 attr_form_is_section_offset before using this test. DW_FORM_data4
21530 and DW_FORM_data8 are members of both the constant class, and of
21531 the classes that contain offsets into other debug sections
21532 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21533 that, if an attribute's can be either a constant or one of the
21534 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21535 taken as section offsets, not constants. */
21538 attr_form_is_constant (const struct attribute
*attr
)
21540 switch (attr
->form
)
21542 case DW_FORM_sdata
:
21543 case DW_FORM_udata
:
21544 case DW_FORM_data1
:
21545 case DW_FORM_data2
:
21546 case DW_FORM_data4
:
21547 case DW_FORM_data8
:
21555 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21556 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21559 attr_form_is_ref (const struct attribute
*attr
)
21561 switch (attr
->form
)
21563 case DW_FORM_ref_addr
:
21568 case DW_FORM_ref_udata
:
21569 case DW_FORM_GNU_ref_alt
:
21576 /* Return the .debug_loc section to use for CU.
21577 For DWO files use .debug_loc.dwo. */
21579 static struct dwarf2_section_info
*
21580 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21583 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21584 return &dwarf2_per_objfile
->loc
;
21587 /* A helper function that fills in a dwarf2_loclist_baton. */
21590 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21591 struct dwarf2_loclist_baton
*baton
,
21592 const struct attribute
*attr
)
21594 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21596 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21598 baton
->per_cu
= cu
->per_cu
;
21599 gdb_assert (baton
->per_cu
);
21600 /* We don't know how long the location list is, but make sure we
21601 don't run off the edge of the section. */
21602 baton
->size
= section
->size
- DW_UNSND (attr
);
21603 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21604 baton
->base_address
= cu
->base_address
;
21605 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21609 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21610 struct dwarf2_cu
*cu
, int is_block
)
21612 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21613 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21615 if (attr_form_is_section_offset (attr
)
21616 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21617 the section. If so, fall through to the complaint in the
21619 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21621 struct dwarf2_loclist_baton
*baton
;
21623 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21624 sizeof (struct dwarf2_loclist_baton
));
21626 fill_in_loclist_baton (cu
, baton
, attr
);
21628 if (cu
->base_known
== 0)
21629 complaint (&symfile_complaints
,
21630 _("Location list used without "
21631 "specifying the CU base address."));
21633 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21634 ? dwarf2_loclist_block_index
21635 : dwarf2_loclist_index
);
21636 SYMBOL_LOCATION_BATON (sym
) = baton
;
21640 struct dwarf2_locexpr_baton
*baton
;
21642 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21643 sizeof (struct dwarf2_locexpr_baton
));
21644 baton
->per_cu
= cu
->per_cu
;
21645 gdb_assert (baton
->per_cu
);
21647 if (attr_form_is_block (attr
))
21649 /* Note that we're just copying the block's data pointer
21650 here, not the actual data. We're still pointing into the
21651 info_buffer for SYM's objfile; right now we never release
21652 that buffer, but when we do clean up properly this may
21654 baton
->size
= DW_BLOCK (attr
)->size
;
21655 baton
->data
= DW_BLOCK (attr
)->data
;
21659 dwarf2_invalid_attrib_class_complaint ("location description",
21660 SYMBOL_NATURAL_NAME (sym
));
21664 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21665 ? dwarf2_locexpr_block_index
21666 : dwarf2_locexpr_index
);
21667 SYMBOL_LOCATION_BATON (sym
) = baton
;
21671 /* Return the OBJFILE associated with the compilation unit CU. If CU
21672 came from a separate debuginfo file, then the master objfile is
21676 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21678 struct objfile
*objfile
= per_cu
->objfile
;
21680 /* Return the master objfile, so that we can report and look up the
21681 correct file containing this variable. */
21682 if (objfile
->separate_debug_objfile_backlink
)
21683 objfile
= objfile
->separate_debug_objfile_backlink
;
21688 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21689 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21690 CU_HEADERP first. */
21692 static const struct comp_unit_head
*
21693 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21694 struct dwarf2_per_cu_data
*per_cu
)
21696 const gdb_byte
*info_ptr
;
21699 return &per_cu
->cu
->header
;
21701 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21703 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21704 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21709 /* Return the address size given in the compilation unit header for CU. */
21712 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21714 struct comp_unit_head cu_header_local
;
21715 const struct comp_unit_head
*cu_headerp
;
21717 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21719 return cu_headerp
->addr_size
;
21722 /* Return the offset size given in the compilation unit header for CU. */
21725 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21727 struct comp_unit_head cu_header_local
;
21728 const struct comp_unit_head
*cu_headerp
;
21730 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21732 return cu_headerp
->offset_size
;
21735 /* See its dwarf2loc.h declaration. */
21738 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21740 struct comp_unit_head cu_header_local
;
21741 const struct comp_unit_head
*cu_headerp
;
21743 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21745 if (cu_headerp
->version
== 2)
21746 return cu_headerp
->addr_size
;
21748 return cu_headerp
->offset_size
;
21751 /* Return the text offset of the CU. The returned offset comes from
21752 this CU's objfile. If this objfile came from a separate debuginfo
21753 file, then the offset may be different from the corresponding
21754 offset in the parent objfile. */
21757 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21759 struct objfile
*objfile
= per_cu
->objfile
;
21761 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21764 /* Locate the .debug_info compilation unit from CU's objfile which contains
21765 the DIE at OFFSET. Raises an error on failure. */
21767 static struct dwarf2_per_cu_data
*
21768 dwarf2_find_containing_comp_unit (sect_offset offset
,
21769 unsigned int offset_in_dwz
,
21770 struct objfile
*objfile
)
21772 struct dwarf2_per_cu_data
*this_cu
;
21774 const sect_offset
*cu_off
;
21777 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21780 struct dwarf2_per_cu_data
*mid_cu
;
21781 int mid
= low
+ (high
- low
) / 2;
21783 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21784 cu_off
= &mid_cu
->offset
;
21785 if (mid_cu
->is_dwz
> offset_in_dwz
21786 || (mid_cu
->is_dwz
== offset_in_dwz
21787 && cu_off
->sect_off
>= offset
.sect_off
))
21792 gdb_assert (low
== high
);
21793 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21794 cu_off
= &this_cu
->offset
;
21795 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21797 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21798 error (_("Dwarf Error: could not find partial DIE containing "
21799 "offset 0x%lx [in module %s]"),
21800 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21802 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21803 <= offset
.sect_off
);
21804 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21808 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21809 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21810 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21811 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21812 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21817 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21820 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21822 memset (cu
, 0, sizeof (*cu
));
21824 cu
->per_cu
= per_cu
;
21825 cu
->objfile
= per_cu
->objfile
;
21826 obstack_init (&cu
->comp_unit_obstack
);
21829 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21832 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21833 enum language pretend_language
)
21835 struct attribute
*attr
;
21837 /* Set the language we're debugging. */
21838 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21840 set_cu_language (DW_UNSND (attr
), cu
);
21843 cu
->language
= pretend_language
;
21844 cu
->language_defn
= language_def (cu
->language
);
21847 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21849 cu
->producer
= DW_STRING (attr
);
21852 /* Release one cached compilation unit, CU. We unlink it from the tree
21853 of compilation units, but we don't remove it from the read_in_chain;
21854 the caller is responsible for that.
21855 NOTE: DATA is a void * because this function is also used as a
21856 cleanup routine. */
21859 free_heap_comp_unit (void *data
)
21861 struct dwarf2_cu
*cu
= data
;
21863 gdb_assert (cu
->per_cu
!= NULL
);
21864 cu
->per_cu
->cu
= NULL
;
21867 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21872 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21873 when we're finished with it. We can't free the pointer itself, but be
21874 sure to unlink it from the cache. Also release any associated storage. */
21877 free_stack_comp_unit (void *data
)
21879 struct dwarf2_cu
*cu
= data
;
21881 gdb_assert (cu
->per_cu
!= NULL
);
21882 cu
->per_cu
->cu
= NULL
;
21885 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21886 cu
->partial_dies
= NULL
;
21889 /* Free all cached compilation units. */
21892 free_cached_comp_units (void *data
)
21894 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21896 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21897 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21898 while (per_cu
!= NULL
)
21900 struct dwarf2_per_cu_data
*next_cu
;
21902 next_cu
= per_cu
->cu
->read_in_chain
;
21904 free_heap_comp_unit (per_cu
->cu
);
21905 *last_chain
= next_cu
;
21911 /* Increase the age counter on each cached compilation unit, and free
21912 any that are too old. */
21915 age_cached_comp_units (void)
21917 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21919 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21920 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21921 while (per_cu
!= NULL
)
21923 per_cu
->cu
->last_used
++;
21924 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21925 dwarf2_mark (per_cu
->cu
);
21926 per_cu
= per_cu
->cu
->read_in_chain
;
21929 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21930 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21931 while (per_cu
!= NULL
)
21933 struct dwarf2_per_cu_data
*next_cu
;
21935 next_cu
= per_cu
->cu
->read_in_chain
;
21937 if (!per_cu
->cu
->mark
)
21939 free_heap_comp_unit (per_cu
->cu
);
21940 *last_chain
= next_cu
;
21943 last_chain
= &per_cu
->cu
->read_in_chain
;
21949 /* Remove a single compilation unit from the cache. */
21952 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
21954 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21956 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21957 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21958 while (per_cu
!= NULL
)
21960 struct dwarf2_per_cu_data
*next_cu
;
21962 next_cu
= per_cu
->cu
->read_in_chain
;
21964 if (per_cu
== target_per_cu
)
21966 free_heap_comp_unit (per_cu
->cu
);
21968 *last_chain
= next_cu
;
21972 last_chain
= &per_cu
->cu
->read_in_chain
;
21978 /* Release all extra memory associated with OBJFILE. */
21981 dwarf2_free_objfile (struct objfile
*objfile
)
21983 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
21985 if (dwarf2_per_objfile
== NULL
)
21988 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21989 free_cached_comp_units (NULL
);
21991 if (dwarf2_per_objfile
->quick_file_names_table
)
21992 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
21994 if (dwarf2_per_objfile
->line_header_hash
)
21995 htab_delete (dwarf2_per_objfile
->line_header_hash
);
21997 /* Everything else should be on the objfile obstack. */
22000 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22001 We store these in a hash table separate from the DIEs, and preserve them
22002 when the DIEs are flushed out of cache.
22004 The CU "per_cu" pointer is needed because offset alone is not enough to
22005 uniquely identify the type. A file may have multiple .debug_types sections,
22006 or the type may come from a DWO file. Furthermore, while it's more logical
22007 to use per_cu->section+offset, with Fission the section with the data is in
22008 the DWO file but we don't know that section at the point we need it.
22009 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22010 because we can enter the lookup routine, get_die_type_at_offset, from
22011 outside this file, and thus won't necessarily have PER_CU->cu.
22012 Fortunately, PER_CU is stable for the life of the objfile. */
22014 struct dwarf2_per_cu_offset_and_type
22016 const struct dwarf2_per_cu_data
*per_cu
;
22017 sect_offset offset
;
22021 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22024 per_cu_offset_and_type_hash (const void *item
)
22026 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22028 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22031 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22034 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22036 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22037 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22039 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22040 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22043 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22044 table if necessary. For convenience, return TYPE.
22046 The DIEs reading must have careful ordering to:
22047 * Not cause infite loops trying to read in DIEs as a prerequisite for
22048 reading current DIE.
22049 * Not trying to dereference contents of still incompletely read in types
22050 while reading in other DIEs.
22051 * Enable referencing still incompletely read in types just by a pointer to
22052 the type without accessing its fields.
22054 Therefore caller should follow these rules:
22055 * Try to fetch any prerequisite types we may need to build this DIE type
22056 before building the type and calling set_die_type.
22057 * After building type call set_die_type for current DIE as soon as
22058 possible before fetching more types to complete the current type.
22059 * Make the type as complete as possible before fetching more types. */
22061 static struct type
*
22062 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22064 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22065 struct objfile
*objfile
= cu
->objfile
;
22066 struct attribute
*attr
;
22067 struct dynamic_prop prop
;
22069 /* For Ada types, make sure that the gnat-specific data is always
22070 initialized (if not already set). There are a few types where
22071 we should not be doing so, because the type-specific area is
22072 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22073 where the type-specific area is used to store the floatformat).
22074 But this is not a problem, because the gnat-specific information
22075 is actually not needed for these types. */
22076 if (need_gnat_info (cu
)
22077 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22078 && TYPE_CODE (type
) != TYPE_CODE_FLT
22079 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22080 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22081 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22082 && !HAVE_GNAT_AUX_INFO (type
))
22083 INIT_GNAT_SPECIFIC (type
);
22085 /* Read DW_AT_data_location and set in type. */
22086 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22087 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22089 TYPE_DATA_LOCATION (type
)
22090 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (prop
));
22091 *TYPE_DATA_LOCATION (type
) = prop
;
22094 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22096 dwarf2_per_objfile
->die_type_hash
=
22097 htab_create_alloc_ex (127,
22098 per_cu_offset_and_type_hash
,
22099 per_cu_offset_and_type_eq
,
22101 &objfile
->objfile_obstack
,
22102 hashtab_obstack_allocate
,
22103 dummy_obstack_deallocate
);
22106 ofs
.per_cu
= cu
->per_cu
;
22107 ofs
.offset
= die
->offset
;
22109 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22110 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22112 complaint (&symfile_complaints
,
22113 _("A problem internal to GDB: DIE 0x%x has type already set"),
22114 die
->offset
.sect_off
);
22115 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22120 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22121 or return NULL if the die does not have a saved type. */
22123 static struct type
*
22124 get_die_type_at_offset (sect_offset offset
,
22125 struct dwarf2_per_cu_data
*per_cu
)
22127 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22129 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22132 ofs
.per_cu
= per_cu
;
22133 ofs
.offset
= offset
;
22134 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22141 /* Look up the type for DIE in CU in die_type_hash,
22142 or return NULL if DIE does not have a saved type. */
22144 static struct type
*
22145 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22147 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22150 /* Add a dependence relationship from CU to REF_PER_CU. */
22153 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22154 struct dwarf2_per_cu_data
*ref_per_cu
)
22158 if (cu
->dependencies
== NULL
)
22160 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22161 NULL
, &cu
->comp_unit_obstack
,
22162 hashtab_obstack_allocate
,
22163 dummy_obstack_deallocate
);
22165 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22167 *slot
= ref_per_cu
;
22170 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22171 Set the mark field in every compilation unit in the
22172 cache that we must keep because we are keeping CU. */
22175 dwarf2_mark_helper (void **slot
, void *data
)
22177 struct dwarf2_per_cu_data
*per_cu
;
22179 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22181 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22182 reading of the chain. As such dependencies remain valid it is not much
22183 useful to track and undo them during QUIT cleanups. */
22184 if (per_cu
->cu
== NULL
)
22187 if (per_cu
->cu
->mark
)
22189 per_cu
->cu
->mark
= 1;
22191 if (per_cu
->cu
->dependencies
!= NULL
)
22192 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22197 /* Set the mark field in CU and in every other compilation unit in the
22198 cache that we must keep because we are keeping CU. */
22201 dwarf2_mark (struct dwarf2_cu
*cu
)
22206 if (cu
->dependencies
!= NULL
)
22207 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22211 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22215 per_cu
->cu
->mark
= 0;
22216 per_cu
= per_cu
->cu
->read_in_chain
;
22220 /* Trivial hash function for partial_die_info: the hash value of a DIE
22221 is its offset in .debug_info for this objfile. */
22224 partial_die_hash (const void *item
)
22226 const struct partial_die_info
*part_die
= item
;
22228 return part_die
->offset
.sect_off
;
22231 /* Trivial comparison function for partial_die_info structures: two DIEs
22232 are equal if they have the same offset. */
22235 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22237 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22238 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22240 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22243 static struct cmd_list_element
*set_dwarf2_cmdlist
;
22244 static struct cmd_list_element
*show_dwarf2_cmdlist
;
22247 set_dwarf2_cmd (char *args
, int from_tty
)
22249 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", all_commands
,
22254 show_dwarf2_cmd (char *args
, int from_tty
)
22256 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
22259 /* Free data associated with OBJFILE, if necessary. */
22262 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22264 struct dwarf2_per_objfile
*data
= d
;
22267 /* Make sure we don't accidentally use dwarf2_per_objfile while
22269 dwarf2_per_objfile
= NULL
;
22271 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22272 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22274 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22275 VEC_free (dwarf2_per_cu_ptr
,
22276 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22277 xfree (data
->all_type_units
);
22279 VEC_free (dwarf2_section_info_def
, data
->types
);
22281 if (data
->dwo_files
)
22282 free_dwo_files (data
->dwo_files
, objfile
);
22283 if (data
->dwp_file
)
22284 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22286 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22287 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22291 /* The "save gdb-index" command. */
22293 /* The contents of the hash table we create when building the string
22295 struct strtab_entry
22297 offset_type offset
;
22301 /* Hash function for a strtab_entry.
22303 Function is used only during write_hash_table so no index format backward
22304 compatibility is needed. */
22307 hash_strtab_entry (const void *e
)
22309 const struct strtab_entry
*entry
= e
;
22310 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22313 /* Equality function for a strtab_entry. */
22316 eq_strtab_entry (const void *a
, const void *b
)
22318 const struct strtab_entry
*ea
= a
;
22319 const struct strtab_entry
*eb
= b
;
22320 return !strcmp (ea
->str
, eb
->str
);
22323 /* Create a strtab_entry hash table. */
22326 create_strtab (void)
22328 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22329 xfree
, xcalloc
, xfree
);
22332 /* Add a string to the constant pool. Return the string's offset in
22336 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22339 struct strtab_entry entry
;
22340 struct strtab_entry
*result
;
22343 slot
= htab_find_slot (table
, &entry
, INSERT
);
22348 result
= XNEW (struct strtab_entry
);
22349 result
->offset
= obstack_object_size (cpool
);
22351 obstack_grow_str0 (cpool
, str
);
22354 return result
->offset
;
22357 /* An entry in the symbol table. */
22358 struct symtab_index_entry
22360 /* The name of the symbol. */
22362 /* The offset of the name in the constant pool. */
22363 offset_type index_offset
;
22364 /* A sorted vector of the indices of all the CUs that hold an object
22366 VEC (offset_type
) *cu_indices
;
22369 /* The symbol table. This is a power-of-2-sized hash table. */
22370 struct mapped_symtab
22372 offset_type n_elements
;
22374 struct symtab_index_entry
**data
;
22377 /* Hash function for a symtab_index_entry. */
22380 hash_symtab_entry (const void *e
)
22382 const struct symtab_index_entry
*entry
= e
;
22383 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22384 sizeof (offset_type
) * VEC_length (offset_type
,
22385 entry
->cu_indices
),
22389 /* Equality function for a symtab_index_entry. */
22392 eq_symtab_entry (const void *a
, const void *b
)
22394 const struct symtab_index_entry
*ea
= a
;
22395 const struct symtab_index_entry
*eb
= b
;
22396 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22397 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22399 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22400 VEC_address (offset_type
, eb
->cu_indices
),
22401 sizeof (offset_type
) * len
);
22404 /* Destroy a symtab_index_entry. */
22407 delete_symtab_entry (void *p
)
22409 struct symtab_index_entry
*entry
= p
;
22410 VEC_free (offset_type
, entry
->cu_indices
);
22414 /* Create a hash table holding symtab_index_entry objects. */
22417 create_symbol_hash_table (void)
22419 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22420 delete_symtab_entry
, xcalloc
, xfree
);
22423 /* Create a new mapped symtab object. */
22425 static struct mapped_symtab
*
22426 create_mapped_symtab (void)
22428 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22429 symtab
->n_elements
= 0;
22430 symtab
->size
= 1024;
22431 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22435 /* Destroy a mapped_symtab. */
22438 cleanup_mapped_symtab (void *p
)
22440 struct mapped_symtab
*symtab
= p
;
22441 /* The contents of the array are freed when the other hash table is
22443 xfree (symtab
->data
);
22447 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22450 Function is used only during write_hash_table so no index format backward
22451 compatibility is needed. */
22453 static struct symtab_index_entry
**
22454 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22456 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22458 index
= hash
& (symtab
->size
- 1);
22459 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22463 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22464 return &symtab
->data
[index
];
22465 index
= (index
+ step
) & (symtab
->size
- 1);
22469 /* Expand SYMTAB's hash table. */
22472 hash_expand (struct mapped_symtab
*symtab
)
22474 offset_type old_size
= symtab
->size
;
22476 struct symtab_index_entry
**old_entries
= symtab
->data
;
22479 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22481 for (i
= 0; i
< old_size
; ++i
)
22483 if (old_entries
[i
])
22485 struct symtab_index_entry
**slot
= find_slot (symtab
,
22486 old_entries
[i
]->name
);
22487 *slot
= old_entries
[i
];
22491 xfree (old_entries
);
22494 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22495 CU_INDEX is the index of the CU in which the symbol appears.
22496 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22499 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22500 int is_static
, gdb_index_symbol_kind kind
,
22501 offset_type cu_index
)
22503 struct symtab_index_entry
**slot
;
22504 offset_type cu_index_and_attrs
;
22506 ++symtab
->n_elements
;
22507 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22508 hash_expand (symtab
);
22510 slot
= find_slot (symtab
, name
);
22513 *slot
= XNEW (struct symtab_index_entry
);
22514 (*slot
)->name
= name
;
22515 /* index_offset is set later. */
22516 (*slot
)->cu_indices
= NULL
;
22519 cu_index_and_attrs
= 0;
22520 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22521 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22522 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22524 /* We don't want to record an index value twice as we want to avoid the
22526 We process all global symbols and then all static symbols
22527 (which would allow us to avoid the duplication by only having to check
22528 the last entry pushed), but a symbol could have multiple kinds in one CU.
22529 To keep things simple we don't worry about the duplication here and
22530 sort and uniqufy the list after we've processed all symbols. */
22531 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22534 /* qsort helper routine for uniquify_cu_indices. */
22537 offset_type_compare (const void *ap
, const void *bp
)
22539 offset_type a
= *(offset_type
*) ap
;
22540 offset_type b
= *(offset_type
*) bp
;
22542 return (a
> b
) - (b
> a
);
22545 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22548 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22552 for (i
= 0; i
< symtab
->size
; ++i
)
22554 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22557 && entry
->cu_indices
!= NULL
)
22559 unsigned int next_to_insert
, next_to_check
;
22560 offset_type last_value
;
22562 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22563 VEC_length (offset_type
, entry
->cu_indices
),
22564 sizeof (offset_type
), offset_type_compare
);
22566 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22567 next_to_insert
= 1;
22568 for (next_to_check
= 1;
22569 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22572 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22575 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22577 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22582 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22587 /* Add a vector of indices to the constant pool. */
22590 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22591 struct symtab_index_entry
*entry
)
22595 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22598 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22599 offset_type val
= MAYBE_SWAP (len
);
22604 entry
->index_offset
= obstack_object_size (cpool
);
22606 obstack_grow (cpool
, &val
, sizeof (val
));
22608 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22611 val
= MAYBE_SWAP (iter
);
22612 obstack_grow (cpool
, &val
, sizeof (val
));
22617 struct symtab_index_entry
*old_entry
= *slot
;
22618 entry
->index_offset
= old_entry
->index_offset
;
22621 return entry
->index_offset
;
22624 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22625 constant pool entries going into the obstack CPOOL. */
22628 write_hash_table (struct mapped_symtab
*symtab
,
22629 struct obstack
*output
, struct obstack
*cpool
)
22632 htab_t symbol_hash_table
;
22635 symbol_hash_table
= create_symbol_hash_table ();
22636 str_table
= create_strtab ();
22638 /* We add all the index vectors to the constant pool first, to
22639 ensure alignment is ok. */
22640 for (i
= 0; i
< symtab
->size
; ++i
)
22642 if (symtab
->data
[i
])
22643 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22646 /* Now write out the hash table. */
22647 for (i
= 0; i
< symtab
->size
; ++i
)
22649 offset_type str_off
, vec_off
;
22651 if (symtab
->data
[i
])
22653 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22654 vec_off
= symtab
->data
[i
]->index_offset
;
22658 /* While 0 is a valid constant pool index, it is not valid
22659 to have 0 for both offsets. */
22664 str_off
= MAYBE_SWAP (str_off
);
22665 vec_off
= MAYBE_SWAP (vec_off
);
22667 obstack_grow (output
, &str_off
, sizeof (str_off
));
22668 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22671 htab_delete (str_table
);
22672 htab_delete (symbol_hash_table
);
22675 /* Struct to map psymtab to CU index in the index file. */
22676 struct psymtab_cu_index_map
22678 struct partial_symtab
*psymtab
;
22679 unsigned int cu_index
;
22683 hash_psymtab_cu_index (const void *item
)
22685 const struct psymtab_cu_index_map
*map
= item
;
22687 return htab_hash_pointer (map
->psymtab
);
22691 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22693 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22694 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22696 return lhs
->psymtab
== rhs
->psymtab
;
22699 /* Helper struct for building the address table. */
22700 struct addrmap_index_data
22702 struct objfile
*objfile
;
22703 struct obstack
*addr_obstack
;
22704 htab_t cu_index_htab
;
22706 /* Non-zero if the previous_* fields are valid.
22707 We can't write an entry until we see the next entry (since it is only then
22708 that we know the end of the entry). */
22709 int previous_valid
;
22710 /* Index of the CU in the table of all CUs in the index file. */
22711 unsigned int previous_cu_index
;
22712 /* Start address of the CU. */
22713 CORE_ADDR previous_cu_start
;
22716 /* Write an address entry to OBSTACK. */
22719 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22720 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22722 offset_type cu_index_to_write
;
22724 CORE_ADDR baseaddr
;
22726 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22728 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22729 obstack_grow (obstack
, addr
, 8);
22730 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22731 obstack_grow (obstack
, addr
, 8);
22732 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22733 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22736 /* Worker function for traversing an addrmap to build the address table. */
22739 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22741 struct addrmap_index_data
*data
= datap
;
22742 struct partial_symtab
*pst
= obj
;
22744 if (data
->previous_valid
)
22745 add_address_entry (data
->objfile
, data
->addr_obstack
,
22746 data
->previous_cu_start
, start_addr
,
22747 data
->previous_cu_index
);
22749 data
->previous_cu_start
= start_addr
;
22752 struct psymtab_cu_index_map find_map
, *map
;
22753 find_map
.psymtab
= pst
;
22754 map
= htab_find (data
->cu_index_htab
, &find_map
);
22755 gdb_assert (map
!= NULL
);
22756 data
->previous_cu_index
= map
->cu_index
;
22757 data
->previous_valid
= 1;
22760 data
->previous_valid
= 0;
22765 /* Write OBJFILE's address map to OBSTACK.
22766 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22767 in the index file. */
22770 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22771 htab_t cu_index_htab
)
22773 struct addrmap_index_data addrmap_index_data
;
22775 /* When writing the address table, we have to cope with the fact that
22776 the addrmap iterator only provides the start of a region; we have to
22777 wait until the next invocation to get the start of the next region. */
22779 addrmap_index_data
.objfile
= objfile
;
22780 addrmap_index_data
.addr_obstack
= obstack
;
22781 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22782 addrmap_index_data
.previous_valid
= 0;
22784 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22785 &addrmap_index_data
);
22787 /* It's highly unlikely the last entry (end address = 0xff...ff)
22788 is valid, but we should still handle it.
22789 The end address is recorded as the start of the next region, but that
22790 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22792 if (addrmap_index_data
.previous_valid
)
22793 add_address_entry (objfile
, obstack
,
22794 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22795 addrmap_index_data
.previous_cu_index
);
22798 /* Return the symbol kind of PSYM. */
22800 static gdb_index_symbol_kind
22801 symbol_kind (struct partial_symbol
*psym
)
22803 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22804 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22812 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22814 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22816 case LOC_CONST_BYTES
:
22817 case LOC_OPTIMIZED_OUT
:
22819 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22821 /* Note: It's currently impossible to recognize psyms as enum values
22822 short of reading the type info. For now punt. */
22823 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22825 /* There are other LOC_FOO values that one might want to classify
22826 as variables, but dwarf2read.c doesn't currently use them. */
22827 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22829 case STRUCT_DOMAIN
:
22830 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22832 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22836 /* Add a list of partial symbols to SYMTAB. */
22839 write_psymbols (struct mapped_symtab
*symtab
,
22841 struct partial_symbol
**psymp
,
22843 offset_type cu_index
,
22846 for (; count
-- > 0; ++psymp
)
22848 struct partial_symbol
*psym
= *psymp
;
22851 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22852 error (_("Ada is not currently supported by the index"));
22854 /* Only add a given psymbol once. */
22855 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22858 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22861 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22862 is_static
, kind
, cu_index
);
22867 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22868 exception if there is an error. */
22871 write_obstack (FILE *file
, struct obstack
*obstack
)
22873 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22875 != obstack_object_size (obstack
))
22876 error (_("couldn't data write to file"));
22879 /* Unlink a file if the argument is not NULL. */
22882 unlink_if_set (void *p
)
22884 char **filename
= p
;
22886 unlink (*filename
);
22889 /* A helper struct used when iterating over debug_types. */
22890 struct signatured_type_index_data
22892 struct objfile
*objfile
;
22893 struct mapped_symtab
*symtab
;
22894 struct obstack
*types_list
;
22899 /* A helper function that writes a single signatured_type to an
22903 write_one_signatured_type (void **slot
, void *d
)
22905 struct signatured_type_index_data
*info
= d
;
22906 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22907 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22910 write_psymbols (info
->symtab
,
22912 info
->objfile
->global_psymbols
.list
22913 + psymtab
->globals_offset
,
22914 psymtab
->n_global_syms
, info
->cu_index
,
22916 write_psymbols (info
->symtab
,
22918 info
->objfile
->static_psymbols
.list
22919 + psymtab
->statics_offset
,
22920 psymtab
->n_static_syms
, info
->cu_index
,
22923 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22924 entry
->per_cu
.offset
.sect_off
);
22925 obstack_grow (info
->types_list
, val
, 8);
22926 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22927 entry
->type_offset_in_tu
.cu_off
);
22928 obstack_grow (info
->types_list
, val
, 8);
22929 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22930 obstack_grow (info
->types_list
, val
, 8);
22937 /* Recurse into all "included" dependencies and write their symbols as
22938 if they appeared in this psymtab. */
22941 recursively_write_psymbols (struct objfile
*objfile
,
22942 struct partial_symtab
*psymtab
,
22943 struct mapped_symtab
*symtab
,
22945 offset_type cu_index
)
22949 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22950 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22951 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22952 symtab
, psyms_seen
, cu_index
);
22954 write_psymbols (symtab
,
22956 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22957 psymtab
->n_global_syms
, cu_index
,
22959 write_psymbols (symtab
,
22961 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
22962 psymtab
->n_static_syms
, cu_index
,
22966 /* Create an index file for OBJFILE in the directory DIR. */
22969 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
22971 struct cleanup
*cleanup
;
22972 char *filename
, *cleanup_filename
;
22973 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
22974 struct obstack cu_list
, types_cu_list
;
22977 struct mapped_symtab
*symtab
;
22978 offset_type val
, size_of_contents
, total_len
;
22981 htab_t cu_index_htab
;
22982 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
22984 if (dwarf2_per_objfile
->using_index
)
22985 error (_("Cannot use an index to create the index"));
22987 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
22988 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22990 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
22993 if (stat (objfile_name (objfile
), &st
) < 0)
22994 perror_with_name (objfile_name (objfile
));
22996 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
22997 INDEX_SUFFIX
, (char *) NULL
);
22998 cleanup
= make_cleanup (xfree
, filename
);
23000 out_file
= gdb_fopen_cloexec (filename
, "wb");
23002 error (_("Can't open `%s' for writing"), filename
);
23004 cleanup_filename
= filename
;
23005 make_cleanup (unlink_if_set
, &cleanup_filename
);
23007 symtab
= create_mapped_symtab ();
23008 make_cleanup (cleanup_mapped_symtab
, symtab
);
23010 obstack_init (&addr_obstack
);
23011 make_cleanup_obstack_free (&addr_obstack
);
23013 obstack_init (&cu_list
);
23014 make_cleanup_obstack_free (&cu_list
);
23016 obstack_init (&types_cu_list
);
23017 make_cleanup_obstack_free (&types_cu_list
);
23019 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23020 NULL
, xcalloc
, xfree
);
23021 make_cleanup_htab_delete (psyms_seen
);
23023 /* While we're scanning CU's create a table that maps a psymtab pointer
23024 (which is what addrmap records) to its index (which is what is recorded
23025 in the index file). This will later be needed to write the address
23027 cu_index_htab
= htab_create_alloc (100,
23028 hash_psymtab_cu_index
,
23029 eq_psymtab_cu_index
,
23030 NULL
, xcalloc
, xfree
);
23031 make_cleanup_htab_delete (cu_index_htab
);
23032 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
23033 xmalloc (sizeof (struct psymtab_cu_index_map
)
23034 * dwarf2_per_objfile
->n_comp_units
);
23035 make_cleanup (xfree
, psymtab_cu_index_map
);
23037 /* The CU list is already sorted, so we don't need to do additional
23038 work here. Also, the debug_types entries do not appear in
23039 all_comp_units, but only in their own hash table. */
23040 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23042 struct dwarf2_per_cu_data
*per_cu
23043 = dwarf2_per_objfile
->all_comp_units
[i
];
23044 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23046 struct psymtab_cu_index_map
*map
;
23049 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23050 It may be referenced from a local scope but in such case it does not
23051 need to be present in .gdb_index. */
23052 if (psymtab
== NULL
)
23055 if (psymtab
->user
== NULL
)
23056 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23058 map
= &psymtab_cu_index_map
[i
];
23059 map
->psymtab
= psymtab
;
23061 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23062 gdb_assert (slot
!= NULL
);
23063 gdb_assert (*slot
== NULL
);
23066 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23067 per_cu
->offset
.sect_off
);
23068 obstack_grow (&cu_list
, val
, 8);
23069 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23070 obstack_grow (&cu_list
, val
, 8);
23073 /* Dump the address map. */
23074 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23076 /* Write out the .debug_type entries, if any. */
23077 if (dwarf2_per_objfile
->signatured_types
)
23079 struct signatured_type_index_data sig_data
;
23081 sig_data
.objfile
= objfile
;
23082 sig_data
.symtab
= symtab
;
23083 sig_data
.types_list
= &types_cu_list
;
23084 sig_data
.psyms_seen
= psyms_seen
;
23085 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23086 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23087 write_one_signatured_type
, &sig_data
);
23090 /* Now that we've processed all symbols we can shrink their cu_indices
23092 uniquify_cu_indices (symtab
);
23094 obstack_init (&constant_pool
);
23095 make_cleanup_obstack_free (&constant_pool
);
23096 obstack_init (&symtab_obstack
);
23097 make_cleanup_obstack_free (&symtab_obstack
);
23098 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23100 obstack_init (&contents
);
23101 make_cleanup_obstack_free (&contents
);
23102 size_of_contents
= 6 * sizeof (offset_type
);
23103 total_len
= size_of_contents
;
23105 /* The version number. */
23106 val
= MAYBE_SWAP (8);
23107 obstack_grow (&contents
, &val
, sizeof (val
));
23109 /* The offset of the CU list from the start of the file. */
23110 val
= MAYBE_SWAP (total_len
);
23111 obstack_grow (&contents
, &val
, sizeof (val
));
23112 total_len
+= obstack_object_size (&cu_list
);
23114 /* The offset of the types CU list from the start of the file. */
23115 val
= MAYBE_SWAP (total_len
);
23116 obstack_grow (&contents
, &val
, sizeof (val
));
23117 total_len
+= obstack_object_size (&types_cu_list
);
23119 /* The offset of the address table from the start of the file. */
23120 val
= MAYBE_SWAP (total_len
);
23121 obstack_grow (&contents
, &val
, sizeof (val
));
23122 total_len
+= obstack_object_size (&addr_obstack
);
23124 /* The offset of the symbol table from the start of the file. */
23125 val
= MAYBE_SWAP (total_len
);
23126 obstack_grow (&contents
, &val
, sizeof (val
));
23127 total_len
+= obstack_object_size (&symtab_obstack
);
23129 /* The offset of the constant pool from the start of the file. */
23130 val
= MAYBE_SWAP (total_len
);
23131 obstack_grow (&contents
, &val
, sizeof (val
));
23132 total_len
+= obstack_object_size (&constant_pool
);
23134 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23136 write_obstack (out_file
, &contents
);
23137 write_obstack (out_file
, &cu_list
);
23138 write_obstack (out_file
, &types_cu_list
);
23139 write_obstack (out_file
, &addr_obstack
);
23140 write_obstack (out_file
, &symtab_obstack
);
23141 write_obstack (out_file
, &constant_pool
);
23145 /* We want to keep the file, so we set cleanup_filename to NULL
23146 here. See unlink_if_set. */
23147 cleanup_filename
= NULL
;
23149 do_cleanups (cleanup
);
23152 /* Implementation of the `save gdb-index' command.
23154 Note that the file format used by this command is documented in the
23155 GDB manual. Any changes here must be documented there. */
23158 save_gdb_index_command (char *arg
, int from_tty
)
23160 struct objfile
*objfile
;
23163 error (_("usage: save gdb-index DIRECTORY"));
23165 ALL_OBJFILES (objfile
)
23169 /* If the objfile does not correspond to an actual file, skip it. */
23170 if (stat (objfile_name (objfile
), &st
) < 0)
23173 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23174 if (dwarf2_per_objfile
)
23179 write_psymtabs_to_index (objfile
, arg
);
23181 CATCH (except
, RETURN_MASK_ERROR
)
23183 exception_fprintf (gdb_stderr
, except
,
23184 _("Error while writing index for `%s': "),
23185 objfile_name (objfile
));
23194 int dwarf2_always_disassemble
;
23197 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
23198 struct cmd_list_element
*c
, const char *value
)
23200 fprintf_filtered (file
,
23201 _("Whether to always disassemble "
23202 "DWARF expressions is %s.\n"),
23207 show_check_physname (struct ui_file
*file
, int from_tty
,
23208 struct cmd_list_element
*c
, const char *value
)
23210 fprintf_filtered (file
,
23211 _("Whether to check \"physname\" is %s.\n"),
23215 void _initialize_dwarf2_read (void);
23218 _initialize_dwarf2_read (void)
23220 struct cmd_list_element
*c
;
23222 dwarf2_objfile_data_key
23223 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23225 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
23226 Set DWARF 2 specific variables.\n\
23227 Configure DWARF 2 variables such as the cache size"),
23228 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
23229 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23231 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
23232 Show DWARF 2 specific variables\n\
23233 Show DWARF 2 variables such as the cache size"),
23234 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
23235 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23237 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23238 &dwarf2_max_cache_age
, _("\
23239 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
23240 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
23241 A higher limit means that cached compilation units will be stored\n\
23242 in memory longer, and more total memory will be used. Zero disables\n\
23243 caching, which can slow down startup."),
23245 show_dwarf2_max_cache_age
,
23246 &set_dwarf2_cmdlist
,
23247 &show_dwarf2_cmdlist
);
23249 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23250 &dwarf2_always_disassemble
, _("\
23251 Set whether `info address' always disassembles DWARF expressions."), _("\
23252 Show whether `info address' always disassembles DWARF expressions."), _("\
23253 When enabled, DWARF expressions are always printed in an assembly-like\n\
23254 syntax. When disabled, expressions will be printed in a more\n\
23255 conversational style, when possible."),
23257 show_dwarf2_always_disassemble
,
23258 &set_dwarf2_cmdlist
,
23259 &show_dwarf2_cmdlist
);
23261 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
23262 Set debugging of the dwarf2 reader."), _("\
23263 Show debugging of the dwarf2 reader."), _("\
23264 When enabled (non-zero), debugging messages are printed during dwarf2\n\
23265 reading and symtab expansion. A value of 1 (one) provides basic\n\
23266 information. A value greater than 1 provides more verbose information."),
23269 &setdebuglist
, &showdebuglist
);
23271 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
23272 Set debugging of the dwarf2 DIE reader."), _("\
23273 Show debugging of the dwarf2 DIE reader."), _("\
23274 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23275 The value is the maximum depth to print."),
23278 &setdebuglist
, &showdebuglist
);
23280 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23281 Set cross-checking of \"physname\" code against demangler."), _("\
23282 Show cross-checking of \"physname\" code against demangler."), _("\
23283 When enabled, GDB's internal \"physname\" code is checked against\n\
23285 NULL
, show_check_physname
,
23286 &setdebuglist
, &showdebuglist
);
23288 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23289 no_class
, &use_deprecated_index_sections
, _("\
23290 Set whether to use deprecated gdb_index sections."), _("\
23291 Show whether to use deprecated gdb_index sections."), _("\
23292 When enabled, deprecated .gdb_index sections are used anyway.\n\
23293 Normally they are ignored either because of a missing feature or\n\
23294 performance issue.\n\
23295 Warning: This option must be enabled before gdb reads the file."),
23298 &setlist
, &showlist
);
23300 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23302 Save a gdb-index file.\n\
23303 Usage: save gdb-index DIRECTORY"),
23305 set_cmd_completer (c
, filename_completer
);
23307 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23308 &dwarf2_locexpr_funcs
);
23309 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23310 &dwarf2_loclist_funcs
);
23312 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23313 &dwarf2_block_frame_base_locexpr_funcs
);
23314 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23315 &dwarf2_block_frame_base_loclist_funcs
);