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
)
4224 volatile struct gdb_exception except
;
4226 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4228 init_psymbol_list (objfile
, 1024);
4231 TRY_CATCH (except
, RETURN_MASK_ERROR
)
4233 /* This isn't really ideal: all the data we allocate on the
4234 objfile's obstack is still uselessly kept around. However,
4235 freeing it seems unsafe. */
4236 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4238 dwarf2_build_psymtabs_hard (objfile
);
4239 discard_cleanups (cleanups
);
4241 if (except
.reason
< 0)
4242 exception_print (gdb_stderr
, except
);
4245 /* Return the total length of the CU described by HEADER. */
4248 get_cu_length (const struct comp_unit_head
*header
)
4250 return header
->initial_length_size
+ header
->length
;
4253 /* Return TRUE if OFFSET is within CU_HEADER. */
4256 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4258 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4259 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4261 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4264 /* Find the base address of the compilation unit for range lists and
4265 location lists. It will normally be specified by DW_AT_low_pc.
4266 In DWARF-3 draft 4, the base address could be overridden by
4267 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4268 compilation units with discontinuous ranges. */
4271 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4273 struct attribute
*attr
;
4276 cu
->base_address
= 0;
4278 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4281 cu
->base_address
= attr_value_as_address (attr
);
4286 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4289 cu
->base_address
= attr_value_as_address (attr
);
4295 /* Read in the comp unit header information from the debug_info at info_ptr.
4296 NOTE: This leaves members offset, first_die_offset to be filled in
4299 static const gdb_byte
*
4300 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4301 const gdb_byte
*info_ptr
, bfd
*abfd
)
4304 unsigned int bytes_read
;
4306 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4307 cu_header
->initial_length_size
= bytes_read
;
4308 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4309 info_ptr
+= bytes_read
;
4310 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4312 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4314 info_ptr
+= bytes_read
;
4315 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4317 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4318 if (signed_addr
< 0)
4319 internal_error (__FILE__
, __LINE__
,
4320 _("read_comp_unit_head: dwarf from non elf file"));
4321 cu_header
->signed_addr_p
= signed_addr
;
4326 /* Helper function that returns the proper abbrev section for
4329 static struct dwarf2_section_info
*
4330 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4332 struct dwarf2_section_info
*abbrev
;
4334 if (this_cu
->is_dwz
)
4335 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4337 abbrev
= &dwarf2_per_objfile
->abbrev
;
4342 /* Subroutine of read_and_check_comp_unit_head and
4343 read_and_check_type_unit_head to simplify them.
4344 Perform various error checking on the header. */
4347 error_check_comp_unit_head (struct comp_unit_head
*header
,
4348 struct dwarf2_section_info
*section
,
4349 struct dwarf2_section_info
*abbrev_section
)
4351 bfd
*abfd
= get_section_bfd_owner (section
);
4352 const char *filename
= get_section_file_name (section
);
4354 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4355 error (_("Dwarf Error: wrong version in compilation unit header "
4356 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4359 if (header
->abbrev_offset
.sect_off
4360 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4361 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4362 "(offset 0x%lx + 6) [in module %s]"),
4363 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4366 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4367 avoid potential 32-bit overflow. */
4368 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4370 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4371 "(offset 0x%lx + 0) [in module %s]"),
4372 (long) header
->length
, (long) header
->offset
.sect_off
,
4376 /* Read in a CU/TU header and perform some basic error checking.
4377 The contents of the header are stored in HEADER.
4378 The result is a pointer to the start of the first DIE. */
4380 static const gdb_byte
*
4381 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4382 struct dwarf2_section_info
*section
,
4383 struct dwarf2_section_info
*abbrev_section
,
4384 const gdb_byte
*info_ptr
,
4385 int is_debug_types_section
)
4387 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4388 bfd
*abfd
= get_section_bfd_owner (section
);
4390 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4392 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4394 /* If we're reading a type unit, skip over the signature and
4395 type_offset fields. */
4396 if (is_debug_types_section
)
4397 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4399 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4401 error_check_comp_unit_head (header
, section
, abbrev_section
);
4406 /* Read in the types comp unit header information from .debug_types entry at
4407 types_ptr. The result is a pointer to one past the end of the header. */
4409 static const gdb_byte
*
4410 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4411 struct dwarf2_section_info
*section
,
4412 struct dwarf2_section_info
*abbrev_section
,
4413 const gdb_byte
*info_ptr
,
4414 ULONGEST
*signature
,
4415 cu_offset
*type_offset_in_tu
)
4417 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4418 bfd
*abfd
= get_section_bfd_owner (section
);
4420 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4422 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4424 /* If we're reading a type unit, skip over the signature and
4425 type_offset fields. */
4426 if (signature
!= NULL
)
4427 *signature
= read_8_bytes (abfd
, info_ptr
);
4429 if (type_offset_in_tu
!= NULL
)
4430 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4431 header
->offset_size
);
4432 info_ptr
+= header
->offset_size
;
4434 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4436 error_check_comp_unit_head (header
, section
, abbrev_section
);
4441 /* Fetch the abbreviation table offset from a comp or type unit header. */
4444 read_abbrev_offset (struct dwarf2_section_info
*section
,
4447 bfd
*abfd
= get_section_bfd_owner (section
);
4448 const gdb_byte
*info_ptr
;
4449 unsigned int length
, initial_length_size
, offset_size
;
4450 sect_offset abbrev_offset
;
4452 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4453 info_ptr
= section
->buffer
+ offset
.sect_off
;
4454 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4455 offset_size
= initial_length_size
== 4 ? 4 : 8;
4456 info_ptr
+= initial_length_size
+ 2 /*version*/;
4457 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4458 return abbrev_offset
;
4461 /* Allocate a new partial symtab for file named NAME and mark this new
4462 partial symtab as being an include of PST. */
4465 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4466 struct objfile
*objfile
)
4468 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4470 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4472 /* It shares objfile->objfile_obstack. */
4473 subpst
->dirname
= pst
->dirname
;
4476 subpst
->section_offsets
= pst
->section_offsets
;
4477 subpst
->textlow
= 0;
4478 subpst
->texthigh
= 0;
4480 subpst
->dependencies
= (struct partial_symtab
**)
4481 obstack_alloc (&objfile
->objfile_obstack
,
4482 sizeof (struct partial_symtab
*));
4483 subpst
->dependencies
[0] = pst
;
4484 subpst
->number_of_dependencies
= 1;
4486 subpst
->globals_offset
= 0;
4487 subpst
->n_global_syms
= 0;
4488 subpst
->statics_offset
= 0;
4489 subpst
->n_static_syms
= 0;
4490 subpst
->compunit_symtab
= NULL
;
4491 subpst
->read_symtab
= pst
->read_symtab
;
4494 /* No private part is necessary for include psymtabs. This property
4495 can be used to differentiate between such include psymtabs and
4496 the regular ones. */
4497 subpst
->read_symtab_private
= NULL
;
4500 /* Read the Line Number Program data and extract the list of files
4501 included by the source file represented by PST. Build an include
4502 partial symtab for each of these included files. */
4505 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4506 struct die_info
*die
,
4507 struct partial_symtab
*pst
)
4509 struct line_header
*lh
= NULL
;
4510 struct attribute
*attr
;
4512 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4514 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4516 return; /* No linetable, so no includes. */
4518 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4519 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4521 free_line_header (lh
);
4525 hash_signatured_type (const void *item
)
4527 const struct signatured_type
*sig_type
= item
;
4529 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4530 return sig_type
->signature
;
4534 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4536 const struct signatured_type
*lhs
= item_lhs
;
4537 const struct signatured_type
*rhs
= item_rhs
;
4539 return lhs
->signature
== rhs
->signature
;
4542 /* Allocate a hash table for signatured types. */
4545 allocate_signatured_type_table (struct objfile
*objfile
)
4547 return htab_create_alloc_ex (41,
4548 hash_signatured_type
,
4551 &objfile
->objfile_obstack
,
4552 hashtab_obstack_allocate
,
4553 dummy_obstack_deallocate
);
4556 /* A helper function to add a signatured type CU to a table. */
4559 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4561 struct signatured_type
*sigt
= *slot
;
4562 struct signatured_type
***datap
= datum
;
4570 /* Create the hash table of all entries in the .debug_types
4571 (or .debug_types.dwo) section(s).
4572 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4573 otherwise it is NULL.
4575 The result is a pointer to the hash table or NULL if there are no types.
4577 Note: This function processes DWO files only, not DWP files. */
4580 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4581 VEC (dwarf2_section_info_def
) *types
)
4583 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4584 htab_t types_htab
= NULL
;
4586 struct dwarf2_section_info
*section
;
4587 struct dwarf2_section_info
*abbrev_section
;
4589 if (VEC_empty (dwarf2_section_info_def
, types
))
4592 abbrev_section
= (dwo_file
!= NULL
4593 ? &dwo_file
->sections
.abbrev
4594 : &dwarf2_per_objfile
->abbrev
);
4596 if (dwarf2_read_debug
)
4597 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4598 dwo_file
? ".dwo" : "",
4599 get_section_file_name (abbrev_section
));
4602 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4606 const gdb_byte
*info_ptr
, *end_ptr
;
4608 dwarf2_read_section (objfile
, section
);
4609 info_ptr
= section
->buffer
;
4611 if (info_ptr
== NULL
)
4614 /* We can't set abfd until now because the section may be empty or
4615 not present, in which case the bfd is unknown. */
4616 abfd
= get_section_bfd_owner (section
);
4618 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4619 because we don't need to read any dies: the signature is in the
4622 end_ptr
= info_ptr
+ section
->size
;
4623 while (info_ptr
< end_ptr
)
4626 cu_offset type_offset_in_tu
;
4628 struct signatured_type
*sig_type
;
4629 struct dwo_unit
*dwo_tu
;
4631 const gdb_byte
*ptr
= info_ptr
;
4632 struct comp_unit_head header
;
4633 unsigned int length
;
4635 offset
.sect_off
= ptr
- section
->buffer
;
4637 /* We need to read the type's signature in order to build the hash
4638 table, but we don't need anything else just yet. */
4640 ptr
= read_and_check_type_unit_head (&header
, section
,
4641 abbrev_section
, ptr
,
4642 &signature
, &type_offset_in_tu
);
4644 length
= get_cu_length (&header
);
4646 /* Skip dummy type units. */
4647 if (ptr
>= info_ptr
+ length
4648 || peek_abbrev_code (abfd
, ptr
) == 0)
4654 if (types_htab
== NULL
)
4657 types_htab
= allocate_dwo_unit_table (objfile
);
4659 types_htab
= allocate_signatured_type_table (objfile
);
4665 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4667 dwo_tu
->dwo_file
= dwo_file
;
4668 dwo_tu
->signature
= signature
;
4669 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4670 dwo_tu
->section
= section
;
4671 dwo_tu
->offset
= offset
;
4672 dwo_tu
->length
= length
;
4676 /* N.B.: type_offset is not usable if this type uses a DWO file.
4677 The real type_offset is in the DWO file. */
4679 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4680 struct signatured_type
);
4681 sig_type
->signature
= signature
;
4682 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4683 sig_type
->per_cu
.objfile
= objfile
;
4684 sig_type
->per_cu
.is_debug_types
= 1;
4685 sig_type
->per_cu
.section
= section
;
4686 sig_type
->per_cu
.offset
= offset
;
4687 sig_type
->per_cu
.length
= length
;
4690 slot
= htab_find_slot (types_htab
,
4691 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4693 gdb_assert (slot
!= NULL
);
4696 sect_offset dup_offset
;
4700 const struct dwo_unit
*dup_tu
= *slot
;
4702 dup_offset
= dup_tu
->offset
;
4706 const struct signatured_type
*dup_tu
= *slot
;
4708 dup_offset
= dup_tu
->per_cu
.offset
;
4711 complaint (&symfile_complaints
,
4712 _("debug type entry at offset 0x%x is duplicate to"
4713 " the entry at offset 0x%x, signature %s"),
4714 offset
.sect_off
, dup_offset
.sect_off
,
4715 hex_string (signature
));
4717 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4719 if (dwarf2_read_debug
> 1)
4720 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4722 hex_string (signature
));
4731 /* Create the hash table of all entries in the .debug_types section,
4732 and initialize all_type_units.
4733 The result is zero if there is an error (e.g. missing .debug_types section),
4734 otherwise non-zero. */
4737 create_all_type_units (struct objfile
*objfile
)
4740 struct signatured_type
**iter
;
4742 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4743 if (types_htab
== NULL
)
4745 dwarf2_per_objfile
->signatured_types
= NULL
;
4749 dwarf2_per_objfile
->signatured_types
= types_htab
;
4751 dwarf2_per_objfile
->n_type_units
4752 = dwarf2_per_objfile
->n_allocated_type_units
4753 = htab_elements (types_htab
);
4754 dwarf2_per_objfile
->all_type_units
4755 = xmalloc (dwarf2_per_objfile
->n_type_units
4756 * sizeof (struct signatured_type
*));
4757 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4758 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4759 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4760 == dwarf2_per_objfile
->n_type_units
);
4765 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4766 If SLOT is non-NULL, it is the entry to use in the hash table.
4767 Otherwise we find one. */
4769 static struct signatured_type
*
4770 add_type_unit (ULONGEST sig
, void **slot
)
4772 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4773 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4774 struct signatured_type
*sig_type
;
4776 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4778 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4780 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4781 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4782 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4783 dwarf2_per_objfile
->all_type_units
4784 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4785 dwarf2_per_objfile
->n_allocated_type_units
4786 * sizeof (struct signatured_type
*));
4787 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4789 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4791 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4792 struct signatured_type
);
4793 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4794 sig_type
->signature
= sig
;
4795 sig_type
->per_cu
.is_debug_types
= 1;
4796 if (dwarf2_per_objfile
->using_index
)
4798 sig_type
->per_cu
.v
.quick
=
4799 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4800 struct dwarf2_per_cu_quick_data
);
4805 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4808 gdb_assert (*slot
== NULL
);
4810 /* The rest of sig_type must be filled in by the caller. */
4814 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4815 Fill in SIG_ENTRY with DWO_ENTRY. */
4818 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4819 struct signatured_type
*sig_entry
,
4820 struct dwo_unit
*dwo_entry
)
4822 /* Make sure we're not clobbering something we don't expect to. */
4823 gdb_assert (! sig_entry
->per_cu
.queued
);
4824 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4825 if (dwarf2_per_objfile
->using_index
)
4827 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4828 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4831 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4832 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4833 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4834 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4835 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4837 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4838 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4839 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4840 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4841 sig_entry
->per_cu
.objfile
= objfile
;
4842 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4843 sig_entry
->dwo_unit
= dwo_entry
;
4846 /* Subroutine of lookup_signatured_type.
4847 If we haven't read the TU yet, create the signatured_type data structure
4848 for a TU to be read in directly from a DWO file, bypassing the stub.
4849 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4850 using .gdb_index, then when reading a CU we want to stay in the DWO file
4851 containing that CU. Otherwise we could end up reading several other DWO
4852 files (due to comdat folding) to process the transitive closure of all the
4853 mentioned TUs, and that can be slow. The current DWO file will have every
4854 type signature that it needs.
4855 We only do this for .gdb_index because in the psymtab case we already have
4856 to read all the DWOs to build the type unit groups. */
4858 static struct signatured_type
*
4859 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4861 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4862 struct dwo_file
*dwo_file
;
4863 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4864 struct signatured_type find_sig_entry
, *sig_entry
;
4867 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4869 /* If TU skeletons have been removed then we may not have read in any
4871 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4873 dwarf2_per_objfile
->signatured_types
4874 = allocate_signatured_type_table (objfile
);
4877 /* We only ever need to read in one copy of a signatured type.
4878 Use the global signatured_types array to do our own comdat-folding
4879 of types. If this is the first time we're reading this TU, and
4880 the TU has an entry in .gdb_index, replace the recorded data from
4881 .gdb_index with this TU. */
4883 find_sig_entry
.signature
= sig
;
4884 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4885 &find_sig_entry
, INSERT
);
4888 /* We can get here with the TU already read, *or* in the process of being
4889 read. Don't reassign the global entry to point to this DWO if that's
4890 the case. Also note that if the TU is already being read, it may not
4891 have come from a DWO, the program may be a mix of Fission-compiled
4892 code and non-Fission-compiled code. */
4894 /* Have we already tried to read this TU?
4895 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4896 needn't exist in the global table yet). */
4897 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4900 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4901 dwo_unit of the TU itself. */
4902 dwo_file
= cu
->dwo_unit
->dwo_file
;
4904 /* Ok, this is the first time we're reading this TU. */
4905 if (dwo_file
->tus
== NULL
)
4907 find_dwo_entry
.signature
= sig
;
4908 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4909 if (dwo_entry
== NULL
)
4912 /* If the global table doesn't have an entry for this TU, add one. */
4913 if (sig_entry
== NULL
)
4914 sig_entry
= add_type_unit (sig
, slot
);
4916 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4917 sig_entry
->per_cu
.tu_read
= 1;
4921 /* Subroutine of lookup_signatured_type.
4922 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4923 then try the DWP file. If the TU stub (skeleton) has been removed then
4924 it won't be in .gdb_index. */
4926 static struct signatured_type
*
4927 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4929 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4930 struct dwp_file
*dwp_file
= get_dwp_file ();
4931 struct dwo_unit
*dwo_entry
;
4932 struct signatured_type find_sig_entry
, *sig_entry
;
4935 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4936 gdb_assert (dwp_file
!= NULL
);
4938 /* If TU skeletons have been removed then we may not have read in any
4940 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4942 dwarf2_per_objfile
->signatured_types
4943 = allocate_signatured_type_table (objfile
);
4946 find_sig_entry
.signature
= sig
;
4947 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4948 &find_sig_entry
, INSERT
);
4951 /* Have we already tried to read this TU?
4952 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4953 needn't exist in the global table yet). */
4954 if (sig_entry
!= NULL
)
4957 if (dwp_file
->tus
== NULL
)
4959 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4960 sig
, 1 /* is_debug_types */);
4961 if (dwo_entry
== NULL
)
4964 sig_entry
= add_type_unit (sig
, slot
);
4965 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4970 /* Lookup a signature based type for DW_FORM_ref_sig8.
4971 Returns NULL if signature SIG is not present in the table.
4972 It is up to the caller to complain about this. */
4974 static struct signatured_type
*
4975 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4978 && dwarf2_per_objfile
->using_index
)
4980 /* We're in a DWO/DWP file, and we're using .gdb_index.
4981 These cases require special processing. */
4982 if (get_dwp_file () == NULL
)
4983 return lookup_dwo_signatured_type (cu
, sig
);
4985 return lookup_dwp_signatured_type (cu
, sig
);
4989 struct signatured_type find_entry
, *entry
;
4991 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4993 find_entry
.signature
= sig
;
4994 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4999 /* Low level DIE reading support. */
5001 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5004 init_cu_die_reader (struct die_reader_specs
*reader
,
5005 struct dwarf2_cu
*cu
,
5006 struct dwarf2_section_info
*section
,
5007 struct dwo_file
*dwo_file
)
5009 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5010 reader
->abfd
= get_section_bfd_owner (section
);
5012 reader
->dwo_file
= dwo_file
;
5013 reader
->die_section
= section
;
5014 reader
->buffer
= section
->buffer
;
5015 reader
->buffer_end
= section
->buffer
+ section
->size
;
5016 reader
->comp_dir
= NULL
;
5019 /* Subroutine of init_cutu_and_read_dies to simplify it.
5020 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5021 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5024 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5025 from it to the DIE in the DWO. If NULL we are skipping the stub.
5026 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5027 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5028 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5029 STUB_COMP_DIR may be non-NULL.
5030 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5031 are filled in with the info of the DIE from the DWO file.
5032 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5033 provided an abbrev table to use.
5034 The result is non-zero if a valid (non-dummy) DIE was found. */
5037 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5038 struct dwo_unit
*dwo_unit
,
5039 int abbrev_table_provided
,
5040 struct die_info
*stub_comp_unit_die
,
5041 const char *stub_comp_dir
,
5042 struct die_reader_specs
*result_reader
,
5043 const gdb_byte
**result_info_ptr
,
5044 struct die_info
**result_comp_unit_die
,
5045 int *result_has_children
)
5047 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5048 struct dwarf2_cu
*cu
= this_cu
->cu
;
5049 struct dwarf2_section_info
*section
;
5051 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5052 ULONGEST signature
; /* Or dwo_id. */
5053 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5054 int i
,num_extra_attrs
;
5055 struct dwarf2_section_info
*dwo_abbrev_section
;
5056 struct attribute
*attr
;
5057 struct die_info
*comp_unit_die
;
5059 /* At most one of these may be provided. */
5060 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5062 /* These attributes aren't processed until later:
5063 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5064 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5065 referenced later. However, these attributes are found in the stub
5066 which we won't have later. In order to not impose this complication
5067 on the rest of the code, we read them here and copy them to the
5076 if (stub_comp_unit_die
!= NULL
)
5078 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5080 if (! this_cu
->is_debug_types
)
5081 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5082 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5083 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5084 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5085 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5087 /* There should be a DW_AT_addr_base attribute here (if needed).
5088 We need the value before we can process DW_FORM_GNU_addr_index. */
5090 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5092 cu
->addr_base
= DW_UNSND (attr
);
5094 /* There should be a DW_AT_ranges_base attribute here (if needed).
5095 We need the value before we can process DW_AT_ranges. */
5096 cu
->ranges_base
= 0;
5097 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5099 cu
->ranges_base
= DW_UNSND (attr
);
5101 else if (stub_comp_dir
!= NULL
)
5103 /* Reconstruct the comp_dir attribute to simplify the code below. */
5104 comp_dir
= (struct attribute
*)
5105 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5106 comp_dir
->name
= DW_AT_comp_dir
;
5107 comp_dir
->form
= DW_FORM_string
;
5108 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5109 DW_STRING (comp_dir
) = stub_comp_dir
;
5112 /* Set up for reading the DWO CU/TU. */
5113 cu
->dwo_unit
= dwo_unit
;
5114 section
= dwo_unit
->section
;
5115 dwarf2_read_section (objfile
, section
);
5116 abfd
= get_section_bfd_owner (section
);
5117 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5118 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5119 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5121 if (this_cu
->is_debug_types
)
5123 ULONGEST header_signature
;
5124 cu_offset type_offset_in_tu
;
5125 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5127 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5131 &type_offset_in_tu
);
5132 /* This is not an assert because it can be caused by bad debug info. */
5133 if (sig_type
->signature
!= header_signature
)
5135 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5136 " TU at offset 0x%x [in module %s]"),
5137 hex_string (sig_type
->signature
),
5138 hex_string (header_signature
),
5139 dwo_unit
->offset
.sect_off
,
5140 bfd_get_filename (abfd
));
5142 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5143 /* For DWOs coming from DWP files, we don't know the CU length
5144 nor the type's offset in the TU until now. */
5145 dwo_unit
->length
= get_cu_length (&cu
->header
);
5146 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5148 /* Establish the type offset that can be used to lookup the type.
5149 For DWO files, we don't know it until now. */
5150 sig_type
->type_offset_in_section
.sect_off
=
5151 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5155 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5158 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5159 /* For DWOs coming from DWP files, we don't know the CU length
5161 dwo_unit
->length
= get_cu_length (&cu
->header
);
5164 /* Replace the CU's original abbrev table with the DWO's.
5165 Reminder: We can't read the abbrev table until we've read the header. */
5166 if (abbrev_table_provided
)
5168 /* Don't free the provided abbrev table, the caller of
5169 init_cutu_and_read_dies owns it. */
5170 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5171 /* Ensure the DWO abbrev table gets freed. */
5172 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5176 dwarf2_free_abbrev_table (cu
);
5177 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5178 /* Leave any existing abbrev table cleanup as is. */
5181 /* Read in the die, but leave space to copy over the attributes
5182 from the stub. This has the benefit of simplifying the rest of
5183 the code - all the work to maintain the illusion of a single
5184 DW_TAG_{compile,type}_unit DIE is done here. */
5185 num_extra_attrs
= ((stmt_list
!= NULL
)
5189 + (comp_dir
!= NULL
));
5190 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5191 result_has_children
, num_extra_attrs
);
5193 /* Copy over the attributes from the stub to the DIE we just read in. */
5194 comp_unit_die
= *result_comp_unit_die
;
5195 i
= comp_unit_die
->num_attrs
;
5196 if (stmt_list
!= NULL
)
5197 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5199 comp_unit_die
->attrs
[i
++] = *low_pc
;
5200 if (high_pc
!= NULL
)
5201 comp_unit_die
->attrs
[i
++] = *high_pc
;
5203 comp_unit_die
->attrs
[i
++] = *ranges
;
5204 if (comp_dir
!= NULL
)
5205 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5206 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5208 if (dwarf2_die_debug
)
5210 fprintf_unfiltered (gdb_stdlog
,
5211 "Read die from %s@0x%x of %s:\n",
5212 get_section_name (section
),
5213 (unsigned) (begin_info_ptr
- section
->buffer
),
5214 bfd_get_filename (abfd
));
5215 dump_die (comp_unit_die
, dwarf2_die_debug
);
5218 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5219 TUs by skipping the stub and going directly to the entry in the DWO file.
5220 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5221 to get it via circuitous means. Blech. */
5222 if (comp_dir
!= NULL
)
5223 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5225 /* Skip dummy compilation units. */
5226 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5227 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5230 *result_info_ptr
= info_ptr
;
5234 /* Subroutine of init_cutu_and_read_dies to simplify it.
5235 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5236 Returns NULL if the specified DWO unit cannot be found. */
5238 static struct dwo_unit
*
5239 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5240 struct die_info
*comp_unit_die
)
5242 struct dwarf2_cu
*cu
= this_cu
->cu
;
5243 struct attribute
*attr
;
5245 struct dwo_unit
*dwo_unit
;
5246 const char *comp_dir
, *dwo_name
;
5248 gdb_assert (cu
!= NULL
);
5250 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5251 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5252 gdb_assert (attr
!= NULL
);
5253 dwo_name
= DW_STRING (attr
);
5255 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5257 comp_dir
= DW_STRING (attr
);
5259 if (this_cu
->is_debug_types
)
5261 struct signatured_type
*sig_type
;
5263 /* Since this_cu is the first member of struct signatured_type,
5264 we can go from a pointer to one to a pointer to the other. */
5265 sig_type
= (struct signatured_type
*) this_cu
;
5266 signature
= sig_type
->signature
;
5267 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5271 struct attribute
*attr
;
5273 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5275 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5277 dwo_name
, objfile_name (this_cu
->objfile
));
5278 signature
= DW_UNSND (attr
);
5279 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5286 /* Subroutine of init_cutu_and_read_dies to simplify it.
5287 See it for a description of the parameters.
5288 Read a TU directly from a DWO file, bypassing the stub.
5290 Note: This function could be a little bit simpler if we shared cleanups
5291 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5292 to do, so we keep this function self-contained. Or we could move this
5293 into our caller, but it's complex enough already. */
5296 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5297 int use_existing_cu
, int keep
,
5298 die_reader_func_ftype
*die_reader_func
,
5301 struct dwarf2_cu
*cu
;
5302 struct signatured_type
*sig_type
;
5303 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5304 struct die_reader_specs reader
;
5305 const gdb_byte
*info_ptr
;
5306 struct die_info
*comp_unit_die
;
5309 /* Verify we can do the following downcast, and that we have the
5311 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5312 sig_type
= (struct signatured_type
*) this_cu
;
5313 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5315 cleanups
= make_cleanup (null_cleanup
, NULL
);
5317 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5319 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5321 /* There's no need to do the rereading_dwo_cu handling that
5322 init_cutu_and_read_dies does since we don't read the stub. */
5326 /* If !use_existing_cu, this_cu->cu must be NULL. */
5327 gdb_assert (this_cu
->cu
== NULL
);
5328 cu
= xmalloc (sizeof (*cu
));
5329 init_one_comp_unit (cu
, this_cu
);
5330 /* If an error occurs while loading, release our storage. */
5331 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5334 /* A future optimization, if needed, would be to use an existing
5335 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5336 could share abbrev tables. */
5338 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5339 0 /* abbrev_table_provided */,
5340 NULL
/* stub_comp_unit_die */,
5341 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5343 &comp_unit_die
, &has_children
) == 0)
5346 do_cleanups (cleanups
);
5350 /* All the "real" work is done here. */
5351 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5353 /* This duplicates the code in init_cutu_and_read_dies,
5354 but the alternative is making the latter more complex.
5355 This function is only for the special case of using DWO files directly:
5356 no point in overly complicating the general case just to handle this. */
5357 if (free_cu_cleanup
!= NULL
)
5361 /* We've successfully allocated this compilation unit. Let our
5362 caller clean it up when finished with it. */
5363 discard_cleanups (free_cu_cleanup
);
5365 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5366 So we have to manually free the abbrev table. */
5367 dwarf2_free_abbrev_table (cu
);
5369 /* Link this CU into read_in_chain. */
5370 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5371 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5374 do_cleanups (free_cu_cleanup
);
5377 do_cleanups (cleanups
);
5380 /* Initialize a CU (or TU) and read its DIEs.
5381 If the CU defers to a DWO file, read the DWO file as well.
5383 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5384 Otherwise the table specified in the comp unit header is read in and used.
5385 This is an optimization for when we already have the abbrev table.
5387 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5388 Otherwise, a new CU is allocated with xmalloc.
5390 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5391 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5393 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5394 linker) then DIE_READER_FUNC will not get called. */
5397 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5398 struct abbrev_table
*abbrev_table
,
5399 int use_existing_cu
, int keep
,
5400 die_reader_func_ftype
*die_reader_func
,
5403 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5404 struct dwarf2_section_info
*section
= this_cu
->section
;
5405 bfd
*abfd
= get_section_bfd_owner (section
);
5406 struct dwarf2_cu
*cu
;
5407 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5408 struct die_reader_specs reader
;
5409 struct die_info
*comp_unit_die
;
5411 struct attribute
*attr
;
5412 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5413 struct signatured_type
*sig_type
= NULL
;
5414 struct dwarf2_section_info
*abbrev_section
;
5415 /* Non-zero if CU currently points to a DWO file and we need to
5416 reread it. When this happens we need to reread the skeleton die
5417 before we can reread the DWO file (this only applies to CUs, not TUs). */
5418 int rereading_dwo_cu
= 0;
5420 if (dwarf2_die_debug
)
5421 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5422 this_cu
->is_debug_types
? "type" : "comp",
5423 this_cu
->offset
.sect_off
);
5425 if (use_existing_cu
)
5428 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5429 file (instead of going through the stub), short-circuit all of this. */
5430 if (this_cu
->reading_dwo_directly
)
5432 /* Narrow down the scope of possibilities to have to understand. */
5433 gdb_assert (this_cu
->is_debug_types
);
5434 gdb_assert (abbrev_table
== NULL
);
5435 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5436 die_reader_func
, data
);
5440 cleanups
= make_cleanup (null_cleanup
, NULL
);
5442 /* This is cheap if the section is already read in. */
5443 dwarf2_read_section (objfile
, section
);
5445 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5447 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5449 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5452 /* If this CU is from a DWO file we need to start over, we need to
5453 refetch the attributes from the skeleton CU.
5454 This could be optimized by retrieving those attributes from when we
5455 were here the first time: the previous comp_unit_die was stored in
5456 comp_unit_obstack. But there's no data yet that we need this
5458 if (cu
->dwo_unit
!= NULL
)
5459 rereading_dwo_cu
= 1;
5463 /* If !use_existing_cu, this_cu->cu must be NULL. */
5464 gdb_assert (this_cu
->cu
== NULL
);
5465 cu
= xmalloc (sizeof (*cu
));
5466 init_one_comp_unit (cu
, this_cu
);
5467 /* If an error occurs while loading, release our storage. */
5468 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5471 /* Get the header. */
5472 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5474 /* We already have the header, there's no need to read it in again. */
5475 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5479 if (this_cu
->is_debug_types
)
5482 cu_offset type_offset_in_tu
;
5484 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5485 abbrev_section
, info_ptr
,
5487 &type_offset_in_tu
);
5489 /* Since per_cu is the first member of struct signatured_type,
5490 we can go from a pointer to one to a pointer to the other. */
5491 sig_type
= (struct signatured_type
*) this_cu
;
5492 gdb_assert (sig_type
->signature
== signature
);
5493 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5494 == type_offset_in_tu
.cu_off
);
5495 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5497 /* LENGTH has not been set yet for type units if we're
5498 using .gdb_index. */
5499 this_cu
->length
= get_cu_length (&cu
->header
);
5501 /* Establish the type offset that can be used to lookup the type. */
5502 sig_type
->type_offset_in_section
.sect_off
=
5503 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5507 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5511 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5512 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5516 /* Skip dummy compilation units. */
5517 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5518 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5520 do_cleanups (cleanups
);
5524 /* If we don't have them yet, read the abbrevs for this compilation unit.
5525 And if we need to read them now, make sure they're freed when we're
5526 done. Note that it's important that if the CU had an abbrev table
5527 on entry we don't free it when we're done: Somewhere up the call stack
5528 it may be in use. */
5529 if (abbrev_table
!= NULL
)
5531 gdb_assert (cu
->abbrev_table
== NULL
);
5532 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5533 == abbrev_table
->offset
.sect_off
);
5534 cu
->abbrev_table
= abbrev_table
;
5536 else if (cu
->abbrev_table
== NULL
)
5538 dwarf2_read_abbrevs (cu
, abbrev_section
);
5539 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5541 else if (rereading_dwo_cu
)
5543 dwarf2_free_abbrev_table (cu
);
5544 dwarf2_read_abbrevs (cu
, abbrev_section
);
5547 /* Read the top level CU/TU die. */
5548 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5549 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5551 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5553 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5554 DWO CU, that this test will fail (the attribute will not be present). */
5555 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5558 struct dwo_unit
*dwo_unit
;
5559 struct die_info
*dwo_comp_unit_die
;
5563 complaint (&symfile_complaints
,
5564 _("compilation unit with DW_AT_GNU_dwo_name"
5565 " has children (offset 0x%x) [in module %s]"),
5566 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5568 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5569 if (dwo_unit
!= NULL
)
5571 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5572 abbrev_table
!= NULL
,
5573 comp_unit_die
, NULL
,
5575 &dwo_comp_unit_die
, &has_children
) == 0)
5578 do_cleanups (cleanups
);
5581 comp_unit_die
= dwo_comp_unit_die
;
5585 /* Yikes, we couldn't find the rest of the DIE, we only have
5586 the stub. A complaint has already been logged. There's
5587 not much more we can do except pass on the stub DIE to
5588 die_reader_func. We don't want to throw an error on bad
5593 /* All of the above is setup for this call. Yikes. */
5594 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5596 /* Done, clean up. */
5597 if (free_cu_cleanup
!= NULL
)
5601 /* We've successfully allocated this compilation unit. Let our
5602 caller clean it up when finished with it. */
5603 discard_cleanups (free_cu_cleanup
);
5605 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5606 So we have to manually free the abbrev table. */
5607 dwarf2_free_abbrev_table (cu
);
5609 /* Link this CU into read_in_chain. */
5610 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5611 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5614 do_cleanups (free_cu_cleanup
);
5617 do_cleanups (cleanups
);
5620 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5621 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5622 to have already done the lookup to find the DWO file).
5624 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5625 THIS_CU->is_debug_types, but nothing else.
5627 We fill in THIS_CU->length.
5629 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5630 linker) then DIE_READER_FUNC will not get called.
5632 THIS_CU->cu is always freed when done.
5633 This is done in order to not leave THIS_CU->cu in a state where we have
5634 to care whether it refers to the "main" CU or the DWO CU. */
5637 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5638 struct dwo_file
*dwo_file
,
5639 die_reader_func_ftype
*die_reader_func
,
5642 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5643 struct dwarf2_section_info
*section
= this_cu
->section
;
5644 bfd
*abfd
= get_section_bfd_owner (section
);
5645 struct dwarf2_section_info
*abbrev_section
;
5646 struct dwarf2_cu cu
;
5647 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5648 struct die_reader_specs reader
;
5649 struct cleanup
*cleanups
;
5650 struct die_info
*comp_unit_die
;
5653 if (dwarf2_die_debug
)
5654 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5655 this_cu
->is_debug_types
? "type" : "comp",
5656 this_cu
->offset
.sect_off
);
5658 gdb_assert (this_cu
->cu
== NULL
);
5660 abbrev_section
= (dwo_file
!= NULL
5661 ? &dwo_file
->sections
.abbrev
5662 : get_abbrev_section_for_cu (this_cu
));
5664 /* This is cheap if the section is already read in. */
5665 dwarf2_read_section (objfile
, section
);
5667 init_one_comp_unit (&cu
, this_cu
);
5669 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5671 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5672 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5673 abbrev_section
, info_ptr
,
5674 this_cu
->is_debug_types
);
5676 this_cu
->length
= get_cu_length (&cu
.header
);
5678 /* Skip dummy compilation units. */
5679 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5680 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5682 do_cleanups (cleanups
);
5686 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5687 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5689 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5690 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5692 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5694 do_cleanups (cleanups
);
5697 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5698 does not lookup the specified DWO file.
5699 This cannot be used to read DWO files.
5701 THIS_CU->cu is always freed when done.
5702 This is done in order to not leave THIS_CU->cu in a state where we have
5703 to care whether it refers to the "main" CU or the DWO CU.
5704 We can revisit this if the data shows there's a performance issue. */
5707 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5708 die_reader_func_ftype
*die_reader_func
,
5711 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5714 /* Type Unit Groups.
5716 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5717 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5718 so that all types coming from the same compilation (.o file) are grouped
5719 together. A future step could be to put the types in the same symtab as
5720 the CU the types ultimately came from. */
5723 hash_type_unit_group (const void *item
)
5725 const struct type_unit_group
*tu_group
= item
;
5727 return hash_stmt_list_entry (&tu_group
->hash
);
5731 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5733 const struct type_unit_group
*lhs
= item_lhs
;
5734 const struct type_unit_group
*rhs
= item_rhs
;
5736 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5739 /* Allocate a hash table for type unit groups. */
5742 allocate_type_unit_groups_table (void)
5744 return htab_create_alloc_ex (3,
5745 hash_type_unit_group
,
5748 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5749 hashtab_obstack_allocate
,
5750 dummy_obstack_deallocate
);
5753 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5754 partial symtabs. We combine several TUs per psymtab to not let the size
5755 of any one psymtab grow too big. */
5756 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5757 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5759 /* Helper routine for get_type_unit_group.
5760 Create the type_unit_group object used to hold one or more TUs. */
5762 static struct type_unit_group
*
5763 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5765 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5766 struct dwarf2_per_cu_data
*per_cu
;
5767 struct type_unit_group
*tu_group
;
5769 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5770 struct type_unit_group
);
5771 per_cu
= &tu_group
->per_cu
;
5772 per_cu
->objfile
= objfile
;
5774 if (dwarf2_per_objfile
->using_index
)
5776 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5777 struct dwarf2_per_cu_quick_data
);
5781 unsigned int line_offset
= line_offset_struct
.sect_off
;
5782 struct partial_symtab
*pst
;
5785 /* Give the symtab a useful name for debug purposes. */
5786 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5787 name
= xstrprintf ("<type_units_%d>",
5788 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5790 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5792 pst
= create_partial_symtab (per_cu
, name
);
5798 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5799 tu_group
->hash
.line_offset
= line_offset_struct
;
5804 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5805 STMT_LIST is a DW_AT_stmt_list attribute. */
5807 static struct type_unit_group
*
5808 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5810 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5811 struct type_unit_group
*tu_group
;
5813 unsigned int line_offset
;
5814 struct type_unit_group type_unit_group_for_lookup
;
5816 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5818 dwarf2_per_objfile
->type_unit_groups
=
5819 allocate_type_unit_groups_table ();
5822 /* Do we need to create a new group, or can we use an existing one? */
5826 line_offset
= DW_UNSND (stmt_list
);
5827 ++tu_stats
->nr_symtab_sharers
;
5831 /* Ugh, no stmt_list. Rare, but we have to handle it.
5832 We can do various things here like create one group per TU or
5833 spread them over multiple groups to split up the expansion work.
5834 To avoid worst case scenarios (too many groups or too large groups)
5835 we, umm, group them in bunches. */
5836 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5837 | (tu_stats
->nr_stmt_less_type_units
5838 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5839 ++tu_stats
->nr_stmt_less_type_units
;
5842 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5843 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5844 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5845 &type_unit_group_for_lookup
, INSERT
);
5849 gdb_assert (tu_group
!= NULL
);
5853 sect_offset line_offset_struct
;
5855 line_offset_struct
.sect_off
= line_offset
;
5856 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5858 ++tu_stats
->nr_symtabs
;
5864 /* Partial symbol tables. */
5866 /* Create a psymtab named NAME and assign it to PER_CU.
5868 The caller must fill in the following details:
5869 dirname, textlow, texthigh. */
5871 static struct partial_symtab
*
5872 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5874 struct objfile
*objfile
= per_cu
->objfile
;
5875 struct partial_symtab
*pst
;
5877 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5879 objfile
->global_psymbols
.next
,
5880 objfile
->static_psymbols
.next
);
5882 pst
->psymtabs_addrmap_supported
= 1;
5884 /* This is the glue that links PST into GDB's symbol API. */
5885 pst
->read_symtab_private
= per_cu
;
5886 pst
->read_symtab
= dwarf2_read_symtab
;
5887 per_cu
->v
.psymtab
= pst
;
5892 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5895 struct process_psymtab_comp_unit_data
5897 /* True if we are reading a DW_TAG_partial_unit. */
5899 int want_partial_unit
;
5901 /* The "pretend" language that is used if the CU doesn't declare a
5904 enum language pretend_language
;
5907 /* die_reader_func for process_psymtab_comp_unit. */
5910 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5911 const gdb_byte
*info_ptr
,
5912 struct die_info
*comp_unit_die
,
5916 struct dwarf2_cu
*cu
= reader
->cu
;
5917 struct objfile
*objfile
= cu
->objfile
;
5918 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5919 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5920 struct attribute
*attr
;
5922 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5923 struct partial_symtab
*pst
;
5925 const char *filename
;
5926 struct process_psymtab_comp_unit_data
*info
= data
;
5928 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5931 gdb_assert (! per_cu
->is_debug_types
);
5933 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5935 cu
->list_in_scope
= &file_symbols
;
5937 /* Allocate a new partial symbol table structure. */
5938 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5939 if (attr
== NULL
|| !DW_STRING (attr
))
5942 filename
= DW_STRING (attr
);
5944 pst
= create_partial_symtab (per_cu
, filename
);
5946 /* This must be done before calling dwarf2_build_include_psymtabs. */
5947 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5949 pst
->dirname
= DW_STRING (attr
);
5951 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5953 dwarf2_find_base_address (comp_unit_die
, cu
);
5955 /* Possibly set the default values of LOWPC and HIGHPC from
5957 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5958 &best_highpc
, cu
, pst
);
5959 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5960 /* Store the contiguous range if it is not empty; it can be empty for
5961 CUs with no code. */
5962 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5963 gdbarch_adjust_dwarf2_addr (gdbarch
,
5964 best_lowpc
+ baseaddr
),
5965 gdbarch_adjust_dwarf2_addr (gdbarch
,
5966 best_highpc
+ baseaddr
) - 1,
5969 /* Check if comp unit has_children.
5970 If so, read the rest of the partial symbols from this comp unit.
5971 If not, there's no more debug_info for this comp unit. */
5974 struct partial_die_info
*first_die
;
5975 CORE_ADDR lowpc
, highpc
;
5977 lowpc
= ((CORE_ADDR
) -1);
5978 highpc
= ((CORE_ADDR
) 0);
5980 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5982 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5985 /* If we didn't find a lowpc, set it to highpc to avoid
5986 complaints from `maint check'. */
5987 if (lowpc
== ((CORE_ADDR
) -1))
5990 /* If the compilation unit didn't have an explicit address range,
5991 then use the information extracted from its child dies. */
5995 best_highpc
= highpc
;
5998 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
5999 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6001 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6002 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6003 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6004 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6005 sort_pst_symbols (objfile
, pst
);
6007 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6010 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6011 struct dwarf2_per_cu_data
*iter
;
6013 /* Fill in 'dependencies' here; we fill in 'users' in a
6015 pst
->number_of_dependencies
= len
;
6016 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6017 len
* sizeof (struct symtab
*));
6019 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6022 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6024 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6027 /* Get the list of files included in the current compilation unit,
6028 and build a psymtab for each of them. */
6029 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6031 if (dwarf2_read_debug
)
6033 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6035 fprintf_unfiltered (gdb_stdlog
,
6036 "Psymtab for %s unit @0x%x: %s - %s"
6037 ", %d global, %d static syms\n",
6038 per_cu
->is_debug_types
? "type" : "comp",
6039 per_cu
->offset
.sect_off
,
6040 paddress (gdbarch
, pst
->textlow
),
6041 paddress (gdbarch
, pst
->texthigh
),
6042 pst
->n_global_syms
, pst
->n_static_syms
);
6046 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6047 Process compilation unit THIS_CU for a psymtab. */
6050 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6051 int want_partial_unit
,
6052 enum language pretend_language
)
6054 struct process_psymtab_comp_unit_data info
;
6056 /* If this compilation unit was already read in, free the
6057 cached copy in order to read it in again. This is
6058 necessary because we skipped some symbols when we first
6059 read in the compilation unit (see load_partial_dies).
6060 This problem could be avoided, but the benefit is unclear. */
6061 if (this_cu
->cu
!= NULL
)
6062 free_one_cached_comp_unit (this_cu
);
6064 gdb_assert (! this_cu
->is_debug_types
);
6065 info
.want_partial_unit
= want_partial_unit
;
6066 info
.pretend_language
= pretend_language
;
6067 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6068 process_psymtab_comp_unit_reader
,
6071 /* Age out any secondary CUs. */
6072 age_cached_comp_units ();
6075 /* Reader function for build_type_psymtabs. */
6078 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6079 const gdb_byte
*info_ptr
,
6080 struct die_info
*type_unit_die
,
6084 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6085 struct dwarf2_cu
*cu
= reader
->cu
;
6086 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6087 struct signatured_type
*sig_type
;
6088 struct type_unit_group
*tu_group
;
6089 struct attribute
*attr
;
6090 struct partial_die_info
*first_die
;
6091 CORE_ADDR lowpc
, highpc
;
6092 struct partial_symtab
*pst
;
6094 gdb_assert (data
== NULL
);
6095 gdb_assert (per_cu
->is_debug_types
);
6096 sig_type
= (struct signatured_type
*) per_cu
;
6101 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6102 tu_group
= get_type_unit_group (cu
, attr
);
6104 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6106 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6107 cu
->list_in_scope
= &file_symbols
;
6108 pst
= create_partial_symtab (per_cu
, "");
6111 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6113 lowpc
= (CORE_ADDR
) -1;
6114 highpc
= (CORE_ADDR
) 0;
6115 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6117 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6118 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6119 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6120 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6121 sort_pst_symbols (objfile
, pst
);
6124 /* Struct used to sort TUs by their abbreviation table offset. */
6126 struct tu_abbrev_offset
6128 struct signatured_type
*sig_type
;
6129 sect_offset abbrev_offset
;
6132 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6135 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6137 const struct tu_abbrev_offset
* const *a
= ap
;
6138 const struct tu_abbrev_offset
* const *b
= bp
;
6139 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6140 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6142 return (aoff
> boff
) - (aoff
< boff
);
6145 /* Efficiently read all the type units.
6146 This does the bulk of the work for build_type_psymtabs.
6148 The efficiency is because we sort TUs by the abbrev table they use and
6149 only read each abbrev table once. In one program there are 200K TUs
6150 sharing 8K abbrev tables.
6152 The main purpose of this function is to support building the
6153 dwarf2_per_objfile->type_unit_groups table.
6154 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6155 can collapse the search space by grouping them by stmt_list.
6156 The savings can be significant, in the same program from above the 200K TUs
6157 share 8K stmt_list tables.
6159 FUNC is expected to call get_type_unit_group, which will create the
6160 struct type_unit_group if necessary and add it to
6161 dwarf2_per_objfile->type_unit_groups. */
6164 build_type_psymtabs_1 (void)
6166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6167 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6168 struct cleanup
*cleanups
;
6169 struct abbrev_table
*abbrev_table
;
6170 sect_offset abbrev_offset
;
6171 struct tu_abbrev_offset
*sorted_by_abbrev
;
6172 struct type_unit_group
**iter
;
6175 /* It's up to the caller to not call us multiple times. */
6176 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6178 if (dwarf2_per_objfile
->n_type_units
== 0)
6181 /* TUs typically share abbrev tables, and there can be way more TUs than
6182 abbrev tables. Sort by abbrev table to reduce the number of times we
6183 read each abbrev table in.
6184 Alternatives are to punt or to maintain a cache of abbrev tables.
6185 This is simpler and efficient enough for now.
6187 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6188 symtab to use). Typically TUs with the same abbrev offset have the same
6189 stmt_list value too so in practice this should work well.
6191 The basic algorithm here is:
6193 sort TUs by abbrev table
6194 for each TU with same abbrev table:
6195 read abbrev table if first user
6196 read TU top level DIE
6197 [IWBN if DWO skeletons had DW_AT_stmt_list]
6200 if (dwarf2_read_debug
)
6201 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6203 /* Sort in a separate table to maintain the order of all_type_units
6204 for .gdb_index: TU indices directly index all_type_units. */
6205 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6206 dwarf2_per_objfile
->n_type_units
);
6207 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6209 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6211 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6212 sorted_by_abbrev
[i
].abbrev_offset
=
6213 read_abbrev_offset (sig_type
->per_cu
.section
,
6214 sig_type
->per_cu
.offset
);
6216 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6217 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6218 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6220 abbrev_offset
.sect_off
= ~(unsigned) 0;
6221 abbrev_table
= NULL
;
6222 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6224 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6226 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6228 /* Switch to the next abbrev table if necessary. */
6229 if (abbrev_table
== NULL
6230 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6232 if (abbrev_table
!= NULL
)
6234 abbrev_table_free (abbrev_table
);
6235 /* Reset to NULL in case abbrev_table_read_table throws
6236 an error: abbrev_table_free_cleanup will get called. */
6237 abbrev_table
= NULL
;
6239 abbrev_offset
= tu
->abbrev_offset
;
6241 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6243 ++tu_stats
->nr_uniq_abbrev_tables
;
6246 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6247 build_type_psymtabs_reader
, NULL
);
6250 do_cleanups (cleanups
);
6253 /* Print collected type unit statistics. */
6256 print_tu_stats (void)
6258 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6260 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6261 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6262 dwarf2_per_objfile
->n_type_units
);
6263 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6264 tu_stats
->nr_uniq_abbrev_tables
);
6265 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6266 tu_stats
->nr_symtabs
);
6267 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6268 tu_stats
->nr_symtab_sharers
);
6269 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6270 tu_stats
->nr_stmt_less_type_units
);
6271 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6272 tu_stats
->nr_all_type_units_reallocs
);
6275 /* Traversal function for build_type_psymtabs. */
6278 build_type_psymtab_dependencies (void **slot
, void *info
)
6280 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6281 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6282 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6283 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6284 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6285 struct signatured_type
*iter
;
6288 gdb_assert (len
> 0);
6289 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6291 pst
->number_of_dependencies
= len
;
6292 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6293 len
* sizeof (struct psymtab
*));
6295 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6298 gdb_assert (iter
->per_cu
.is_debug_types
);
6299 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6300 iter
->type_unit_group
= tu_group
;
6303 VEC_free (sig_type_ptr
, tu_group
->tus
);
6308 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6309 Build partial symbol tables for the .debug_types comp-units. */
6312 build_type_psymtabs (struct objfile
*objfile
)
6314 if (! create_all_type_units (objfile
))
6317 build_type_psymtabs_1 ();
6320 /* Traversal function for process_skeletonless_type_unit.
6321 Read a TU in a DWO file and build partial symbols for it. */
6324 process_skeletonless_type_unit (void **slot
, void *info
)
6326 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6327 struct objfile
*objfile
= info
;
6328 struct signatured_type find_entry
, *entry
;
6330 /* If this TU doesn't exist in the global table, add it and read it in. */
6332 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6334 dwarf2_per_objfile
->signatured_types
6335 = allocate_signatured_type_table (objfile
);
6338 find_entry
.signature
= dwo_unit
->signature
;
6339 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6341 /* If we've already seen this type there's nothing to do. What's happening
6342 is we're doing our own version of comdat-folding here. */
6346 /* This does the job that create_all_type_units would have done for
6348 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6349 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6352 /* This does the job that build_type_psymtabs_1 would have done. */
6353 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6354 build_type_psymtabs_reader
, NULL
);
6359 /* Traversal function for process_skeletonless_type_units. */
6362 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6364 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6366 if (dwo_file
->tus
!= NULL
)
6368 htab_traverse_noresize (dwo_file
->tus
,
6369 process_skeletonless_type_unit
, info
);
6375 /* Scan all TUs of DWO files, verifying we've processed them.
6376 This is needed in case a TU was emitted without its skeleton.
6377 Note: This can't be done until we know what all the DWO files are. */
6380 process_skeletonless_type_units (struct objfile
*objfile
)
6382 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6383 if (get_dwp_file () == NULL
6384 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6386 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6387 process_dwo_file_for_skeletonless_type_units
,
6392 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6395 psymtabs_addrmap_cleanup (void *o
)
6397 struct objfile
*objfile
= o
;
6399 objfile
->psymtabs_addrmap
= NULL
;
6402 /* Compute the 'user' field for each psymtab in OBJFILE. */
6405 set_partial_user (struct objfile
*objfile
)
6409 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6411 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6412 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6418 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6420 /* Set the 'user' field only if it is not already set. */
6421 if (pst
->dependencies
[j
]->user
== NULL
)
6422 pst
->dependencies
[j
]->user
= pst
;
6427 /* Build the partial symbol table by doing a quick pass through the
6428 .debug_info and .debug_abbrev sections. */
6431 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6433 struct cleanup
*back_to
, *addrmap_cleanup
;
6434 struct obstack temp_obstack
;
6437 if (dwarf2_read_debug
)
6439 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6440 objfile_name (objfile
));
6443 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6445 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6447 /* Any cached compilation units will be linked by the per-objfile
6448 read_in_chain. Make sure to free them when we're done. */
6449 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6451 build_type_psymtabs (objfile
);
6453 create_all_comp_units (objfile
);
6455 /* Create a temporary address map on a temporary obstack. We later
6456 copy this to the final obstack. */
6457 obstack_init (&temp_obstack
);
6458 make_cleanup_obstack_free (&temp_obstack
);
6459 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6460 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6462 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6464 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6466 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6469 /* This has to wait until we read the CUs, we need the list of DWOs. */
6470 process_skeletonless_type_units (objfile
);
6472 /* Now that all TUs have been processed we can fill in the dependencies. */
6473 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6475 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6476 build_type_psymtab_dependencies
, NULL
);
6479 if (dwarf2_read_debug
)
6482 set_partial_user (objfile
);
6484 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6485 &objfile
->objfile_obstack
);
6486 discard_cleanups (addrmap_cleanup
);
6488 do_cleanups (back_to
);
6490 if (dwarf2_read_debug
)
6491 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6492 objfile_name (objfile
));
6495 /* die_reader_func for load_partial_comp_unit. */
6498 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6499 const gdb_byte
*info_ptr
,
6500 struct die_info
*comp_unit_die
,
6504 struct dwarf2_cu
*cu
= reader
->cu
;
6506 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6508 /* Check if comp unit has_children.
6509 If so, read the rest of the partial symbols from this comp unit.
6510 If not, there's no more debug_info for this comp unit. */
6512 load_partial_dies (reader
, info_ptr
, 0);
6515 /* Load the partial DIEs for a secondary CU into memory.
6516 This is also used when rereading a primary CU with load_all_dies. */
6519 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6521 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6522 load_partial_comp_unit_reader
, NULL
);
6526 read_comp_units_from_section (struct objfile
*objfile
,
6527 struct dwarf2_section_info
*section
,
6528 unsigned int is_dwz
,
6531 struct dwarf2_per_cu_data
***all_comp_units
)
6533 const gdb_byte
*info_ptr
;
6534 bfd
*abfd
= get_section_bfd_owner (section
);
6536 if (dwarf2_read_debug
)
6537 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6538 get_section_name (section
),
6539 get_section_file_name (section
));
6541 dwarf2_read_section (objfile
, section
);
6543 info_ptr
= section
->buffer
;
6545 while (info_ptr
< section
->buffer
+ section
->size
)
6547 unsigned int length
, initial_length_size
;
6548 struct dwarf2_per_cu_data
*this_cu
;
6551 offset
.sect_off
= info_ptr
- section
->buffer
;
6553 /* Read just enough information to find out where the next
6554 compilation unit is. */
6555 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6557 /* Save the compilation unit for later lookup. */
6558 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6559 sizeof (struct dwarf2_per_cu_data
));
6560 memset (this_cu
, 0, sizeof (*this_cu
));
6561 this_cu
->offset
= offset
;
6562 this_cu
->length
= length
+ initial_length_size
;
6563 this_cu
->is_dwz
= is_dwz
;
6564 this_cu
->objfile
= objfile
;
6565 this_cu
->section
= section
;
6567 if (*n_comp_units
== *n_allocated
)
6570 *all_comp_units
= xrealloc (*all_comp_units
,
6572 * sizeof (struct dwarf2_per_cu_data
*));
6574 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6577 info_ptr
= info_ptr
+ this_cu
->length
;
6581 /* Create a list of all compilation units in OBJFILE.
6582 This is only done for -readnow and building partial symtabs. */
6585 create_all_comp_units (struct objfile
*objfile
)
6589 struct dwarf2_per_cu_data
**all_comp_units
;
6590 struct dwz_file
*dwz
;
6594 all_comp_units
= xmalloc (n_allocated
6595 * sizeof (struct dwarf2_per_cu_data
*));
6597 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6598 &n_allocated
, &n_comp_units
, &all_comp_units
);
6600 dwz
= dwarf2_get_dwz_file ();
6602 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6603 &n_allocated
, &n_comp_units
,
6606 dwarf2_per_objfile
->all_comp_units
6607 = obstack_alloc (&objfile
->objfile_obstack
,
6608 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6609 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6610 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6611 xfree (all_comp_units
);
6612 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6615 /* Process all loaded DIEs for compilation unit CU, starting at
6616 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6617 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6618 DW_AT_ranges). See the comments of add_partial_subprogram on how
6619 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6622 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6623 CORE_ADDR
*highpc
, int set_addrmap
,
6624 struct dwarf2_cu
*cu
)
6626 struct partial_die_info
*pdi
;
6628 /* Now, march along the PDI's, descending into ones which have
6629 interesting children but skipping the children of the other ones,
6630 until we reach the end of the compilation unit. */
6636 fixup_partial_die (pdi
, cu
);
6638 /* Anonymous namespaces or modules have no name but have interesting
6639 children, so we need to look at them. Ditto for anonymous
6642 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6643 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6644 || pdi
->tag
== DW_TAG_imported_unit
)
6648 case DW_TAG_subprogram
:
6649 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6651 case DW_TAG_constant
:
6652 case DW_TAG_variable
:
6653 case DW_TAG_typedef
:
6654 case DW_TAG_union_type
:
6655 if (!pdi
->is_declaration
)
6657 add_partial_symbol (pdi
, cu
);
6660 case DW_TAG_class_type
:
6661 case DW_TAG_interface_type
:
6662 case DW_TAG_structure_type
:
6663 if (!pdi
->is_declaration
)
6665 add_partial_symbol (pdi
, cu
);
6668 case DW_TAG_enumeration_type
:
6669 if (!pdi
->is_declaration
)
6670 add_partial_enumeration (pdi
, cu
);
6672 case DW_TAG_base_type
:
6673 case DW_TAG_subrange_type
:
6674 /* File scope base type definitions are added to the partial
6676 add_partial_symbol (pdi
, cu
);
6678 case DW_TAG_namespace
:
6679 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6682 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6684 case DW_TAG_imported_unit
:
6686 struct dwarf2_per_cu_data
*per_cu
;
6688 /* For now we don't handle imported units in type units. */
6689 if (cu
->per_cu
->is_debug_types
)
6691 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6692 " supported in type units [in module %s]"),
6693 objfile_name (cu
->objfile
));
6696 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6700 /* Go read the partial unit, if needed. */
6701 if (per_cu
->v
.psymtab
== NULL
)
6702 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6704 VEC_safe_push (dwarf2_per_cu_ptr
,
6705 cu
->per_cu
->imported_symtabs
, per_cu
);
6708 case DW_TAG_imported_declaration
:
6709 add_partial_symbol (pdi
, cu
);
6716 /* If the die has a sibling, skip to the sibling. */
6718 pdi
= pdi
->die_sibling
;
6722 /* Functions used to compute the fully scoped name of a partial DIE.
6724 Normally, this is simple. For C++, the parent DIE's fully scoped
6725 name is concatenated with "::" and the partial DIE's name. For
6726 Java, the same thing occurs except that "." is used instead of "::".
6727 Enumerators are an exception; they use the scope of their parent
6728 enumeration type, i.e. the name of the enumeration type is not
6729 prepended to the enumerator.
6731 There are two complexities. One is DW_AT_specification; in this
6732 case "parent" means the parent of the target of the specification,
6733 instead of the direct parent of the DIE. The other is compilers
6734 which do not emit DW_TAG_namespace; in this case we try to guess
6735 the fully qualified name of structure types from their members'
6736 linkage names. This must be done using the DIE's children rather
6737 than the children of any DW_AT_specification target. We only need
6738 to do this for structures at the top level, i.e. if the target of
6739 any DW_AT_specification (if any; otherwise the DIE itself) does not
6742 /* Compute the scope prefix associated with PDI's parent, in
6743 compilation unit CU. The result will be allocated on CU's
6744 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6745 field. NULL is returned if no prefix is necessary. */
6747 partial_die_parent_scope (struct partial_die_info
*pdi
,
6748 struct dwarf2_cu
*cu
)
6750 const char *grandparent_scope
;
6751 struct partial_die_info
*parent
, *real_pdi
;
6753 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6754 then this means the parent of the specification DIE. */
6757 while (real_pdi
->has_specification
)
6758 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6759 real_pdi
->spec_is_dwz
, cu
);
6761 parent
= real_pdi
->die_parent
;
6765 if (parent
->scope_set
)
6766 return parent
->scope
;
6768 fixup_partial_die (parent
, cu
);
6770 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6772 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6773 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6774 Work around this problem here. */
6775 if (cu
->language
== language_cplus
6776 && parent
->tag
== DW_TAG_namespace
6777 && strcmp (parent
->name
, "::") == 0
6778 && grandparent_scope
== NULL
)
6780 parent
->scope
= NULL
;
6781 parent
->scope_set
= 1;
6785 if (pdi
->tag
== DW_TAG_enumerator
)
6786 /* Enumerators should not get the name of the enumeration as a prefix. */
6787 parent
->scope
= grandparent_scope
;
6788 else if (parent
->tag
== DW_TAG_namespace
6789 || parent
->tag
== DW_TAG_module
6790 || parent
->tag
== DW_TAG_structure_type
6791 || parent
->tag
== DW_TAG_class_type
6792 || parent
->tag
== DW_TAG_interface_type
6793 || parent
->tag
== DW_TAG_union_type
6794 || parent
->tag
== DW_TAG_enumeration_type
)
6796 if (grandparent_scope
== NULL
)
6797 parent
->scope
= parent
->name
;
6799 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6801 parent
->name
, 0, cu
);
6805 /* FIXME drow/2004-04-01: What should we be doing with
6806 function-local names? For partial symbols, we should probably be
6808 complaint (&symfile_complaints
,
6809 _("unhandled containing DIE tag %d for DIE at %d"),
6810 parent
->tag
, pdi
->offset
.sect_off
);
6811 parent
->scope
= grandparent_scope
;
6814 parent
->scope_set
= 1;
6815 return parent
->scope
;
6818 /* Return the fully scoped name associated with PDI, from compilation unit
6819 CU. The result will be allocated with malloc. */
6822 partial_die_full_name (struct partial_die_info
*pdi
,
6823 struct dwarf2_cu
*cu
)
6825 const char *parent_scope
;
6827 /* If this is a template instantiation, we can not work out the
6828 template arguments from partial DIEs. So, unfortunately, we have
6829 to go through the full DIEs. At least any work we do building
6830 types here will be reused if full symbols are loaded later. */
6831 if (pdi
->has_template_arguments
)
6833 fixup_partial_die (pdi
, cu
);
6835 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6837 struct die_info
*die
;
6838 struct attribute attr
;
6839 struct dwarf2_cu
*ref_cu
= cu
;
6841 /* DW_FORM_ref_addr is using section offset. */
6843 attr
.form
= DW_FORM_ref_addr
;
6844 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6845 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6847 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6851 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6852 if (parent_scope
== NULL
)
6855 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6859 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6861 struct objfile
*objfile
= cu
->objfile
;
6862 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6864 const char *actual_name
= NULL
;
6866 char *built_actual_name
;
6868 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6870 built_actual_name
= partial_die_full_name (pdi
, cu
);
6871 if (built_actual_name
!= NULL
)
6872 actual_name
= built_actual_name
;
6874 if (actual_name
== NULL
)
6875 actual_name
= pdi
->name
;
6879 case DW_TAG_subprogram
:
6880 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6881 if (pdi
->is_external
|| cu
->language
== language_ada
)
6883 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6884 of the global scope. But in Ada, we want to be able to access
6885 nested procedures globally. So all Ada subprograms are stored
6886 in the global scope. */
6887 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6889 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6890 built_actual_name
!= NULL
,
6891 VAR_DOMAIN
, LOC_BLOCK
,
6892 &objfile
->global_psymbols
,
6893 0, addr
, cu
->language
, objfile
);
6897 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6899 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6900 built_actual_name
!= NULL
,
6901 VAR_DOMAIN
, LOC_BLOCK
,
6902 &objfile
->static_psymbols
,
6903 0, addr
, cu
->language
, objfile
);
6906 case DW_TAG_constant
:
6908 struct psymbol_allocation_list
*list
;
6910 if (pdi
->is_external
)
6911 list
= &objfile
->global_psymbols
;
6913 list
= &objfile
->static_psymbols
;
6914 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6915 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6916 list
, 0, 0, cu
->language
, objfile
);
6919 case DW_TAG_variable
:
6921 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6925 && !dwarf2_per_objfile
->has_section_at_zero
)
6927 /* A global or static variable may also have been stripped
6928 out by the linker if unused, in which case its address
6929 will be nullified; do not add such variables into partial
6930 symbol table then. */
6932 else if (pdi
->is_external
)
6935 Don't enter into the minimal symbol tables as there is
6936 a minimal symbol table entry from the ELF symbols already.
6937 Enter into partial symbol table if it has a location
6938 descriptor or a type.
6939 If the location descriptor is missing, new_symbol will create
6940 a LOC_UNRESOLVED symbol, the address of the variable will then
6941 be determined from the minimal symbol table whenever the variable
6943 The address for the partial symbol table entry is not
6944 used by GDB, but it comes in handy for debugging partial symbol
6947 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6948 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6949 built_actual_name
!= NULL
,
6950 VAR_DOMAIN
, LOC_STATIC
,
6951 &objfile
->global_psymbols
,
6953 cu
->language
, objfile
);
6957 /* Static Variable. Skip symbols without location descriptors. */
6958 if (pdi
->d
.locdesc
== NULL
)
6960 xfree (built_actual_name
);
6963 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6964 mst_file_data, objfile); */
6965 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6966 built_actual_name
!= NULL
,
6967 VAR_DOMAIN
, LOC_STATIC
,
6968 &objfile
->static_psymbols
,
6970 cu
->language
, objfile
);
6973 case DW_TAG_typedef
:
6974 case DW_TAG_base_type
:
6975 case DW_TAG_subrange_type
:
6976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6977 built_actual_name
!= NULL
,
6978 VAR_DOMAIN
, LOC_TYPEDEF
,
6979 &objfile
->static_psymbols
,
6980 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6982 case DW_TAG_imported_declaration
:
6983 case DW_TAG_namespace
:
6984 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6985 built_actual_name
!= NULL
,
6986 VAR_DOMAIN
, LOC_TYPEDEF
,
6987 &objfile
->global_psymbols
,
6988 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6991 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6992 built_actual_name
!= NULL
,
6993 MODULE_DOMAIN
, LOC_TYPEDEF
,
6994 &objfile
->global_psymbols
,
6995 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6997 case DW_TAG_class_type
:
6998 case DW_TAG_interface_type
:
6999 case DW_TAG_structure_type
:
7000 case DW_TAG_union_type
:
7001 case DW_TAG_enumeration_type
:
7002 /* Skip external references. The DWARF standard says in the section
7003 about "Structure, Union, and Class Type Entries": "An incomplete
7004 structure, union or class type is represented by a structure,
7005 union or class entry that does not have a byte size attribute
7006 and that has a DW_AT_declaration attribute." */
7007 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7009 xfree (built_actual_name
);
7013 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7014 static vs. global. */
7015 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7016 built_actual_name
!= NULL
,
7017 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7018 (cu
->language
== language_cplus
7019 || cu
->language
== language_java
)
7020 ? &objfile
->global_psymbols
7021 : &objfile
->static_psymbols
,
7022 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7025 case DW_TAG_enumerator
:
7026 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7027 built_actual_name
!= NULL
,
7028 VAR_DOMAIN
, LOC_CONST
,
7029 (cu
->language
== language_cplus
7030 || cu
->language
== language_java
)
7031 ? &objfile
->global_psymbols
7032 : &objfile
->static_psymbols
,
7033 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7039 xfree (built_actual_name
);
7042 /* Read a partial die corresponding to a namespace; also, add a symbol
7043 corresponding to that namespace to the symbol table. NAMESPACE is
7044 the name of the enclosing namespace. */
7047 add_partial_namespace (struct partial_die_info
*pdi
,
7048 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7049 int set_addrmap
, struct dwarf2_cu
*cu
)
7051 /* Add a symbol for the namespace. */
7053 add_partial_symbol (pdi
, cu
);
7055 /* Now scan partial symbols in that namespace. */
7057 if (pdi
->has_children
)
7058 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7061 /* Read a partial die corresponding to a Fortran module. */
7064 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7065 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7067 /* Add a symbol for the namespace. */
7069 add_partial_symbol (pdi
, cu
);
7071 /* Now scan partial symbols in that module. */
7073 if (pdi
->has_children
)
7074 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7077 /* Read a partial die corresponding to a subprogram and create a partial
7078 symbol for that subprogram. When the CU language allows it, this
7079 routine also defines a partial symbol for each nested subprogram
7080 that this subprogram contains. If SET_ADDRMAP is true, record the
7081 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7082 and highest PC values found in PDI.
7084 PDI may also be a lexical block, in which case we simply search
7085 recursively for subprograms defined inside that lexical block.
7086 Again, this is only performed when the CU language allows this
7087 type of definitions. */
7090 add_partial_subprogram (struct partial_die_info
*pdi
,
7091 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7092 int set_addrmap
, struct dwarf2_cu
*cu
)
7094 if (pdi
->tag
== DW_TAG_subprogram
)
7096 if (pdi
->has_pc_info
)
7098 if (pdi
->lowpc
< *lowpc
)
7099 *lowpc
= pdi
->lowpc
;
7100 if (pdi
->highpc
> *highpc
)
7101 *highpc
= pdi
->highpc
;
7104 struct objfile
*objfile
= cu
->objfile
;
7105 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7110 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7111 SECT_OFF_TEXT (objfile
));
7112 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7113 pdi
->lowpc
+ baseaddr
);
7114 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7115 pdi
->highpc
+ baseaddr
);
7116 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7117 cu
->per_cu
->v
.psymtab
);
7121 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7123 if (!pdi
->is_declaration
)
7124 /* Ignore subprogram DIEs that do not have a name, they are
7125 illegal. Do not emit a complaint at this point, we will
7126 do so when we convert this psymtab into a symtab. */
7128 add_partial_symbol (pdi
, cu
);
7132 if (! pdi
->has_children
)
7135 if (cu
->language
== language_ada
)
7137 pdi
= pdi
->die_child
;
7140 fixup_partial_die (pdi
, cu
);
7141 if (pdi
->tag
== DW_TAG_subprogram
7142 || pdi
->tag
== DW_TAG_lexical_block
)
7143 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7144 pdi
= pdi
->die_sibling
;
7149 /* Read a partial die corresponding to an enumeration type. */
7152 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7153 struct dwarf2_cu
*cu
)
7155 struct partial_die_info
*pdi
;
7157 if (enum_pdi
->name
!= NULL
)
7158 add_partial_symbol (enum_pdi
, cu
);
7160 pdi
= enum_pdi
->die_child
;
7163 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7164 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7166 add_partial_symbol (pdi
, cu
);
7167 pdi
= pdi
->die_sibling
;
7171 /* Return the initial uleb128 in the die at INFO_PTR. */
7174 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7176 unsigned int bytes_read
;
7178 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7181 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7182 Return the corresponding abbrev, or NULL if the number is zero (indicating
7183 an empty DIE). In either case *BYTES_READ will be set to the length of
7184 the initial number. */
7186 static struct abbrev_info
*
7187 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7188 struct dwarf2_cu
*cu
)
7190 bfd
*abfd
= cu
->objfile
->obfd
;
7191 unsigned int abbrev_number
;
7192 struct abbrev_info
*abbrev
;
7194 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7196 if (abbrev_number
== 0)
7199 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7202 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7203 " at offset 0x%x [in module %s]"),
7204 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7205 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7211 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7212 Returns a pointer to the end of a series of DIEs, terminated by an empty
7213 DIE. Any children of the skipped DIEs will also be skipped. */
7215 static const gdb_byte
*
7216 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7218 struct dwarf2_cu
*cu
= reader
->cu
;
7219 struct abbrev_info
*abbrev
;
7220 unsigned int bytes_read
;
7224 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7226 return info_ptr
+ bytes_read
;
7228 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7232 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7233 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7234 abbrev corresponding to that skipped uleb128 should be passed in
7235 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7238 static const gdb_byte
*
7239 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7240 struct abbrev_info
*abbrev
)
7242 unsigned int bytes_read
;
7243 struct attribute attr
;
7244 bfd
*abfd
= reader
->abfd
;
7245 struct dwarf2_cu
*cu
= reader
->cu
;
7246 const gdb_byte
*buffer
= reader
->buffer
;
7247 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7248 const gdb_byte
*start_info_ptr
= info_ptr
;
7249 unsigned int form
, i
;
7251 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7253 /* The only abbrev we care about is DW_AT_sibling. */
7254 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7256 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7257 if (attr
.form
== DW_FORM_ref_addr
)
7258 complaint (&symfile_complaints
,
7259 _("ignoring absolute DW_AT_sibling"));
7262 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7263 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7265 if (sibling_ptr
< info_ptr
)
7266 complaint (&symfile_complaints
,
7267 _("DW_AT_sibling points backwards"));
7268 else if (sibling_ptr
> reader
->buffer_end
)
7269 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7275 /* If it isn't DW_AT_sibling, skip this attribute. */
7276 form
= abbrev
->attrs
[i
].form
;
7280 case DW_FORM_ref_addr
:
7281 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7282 and later it is offset sized. */
7283 if (cu
->header
.version
== 2)
7284 info_ptr
+= cu
->header
.addr_size
;
7286 info_ptr
+= cu
->header
.offset_size
;
7288 case DW_FORM_GNU_ref_alt
:
7289 info_ptr
+= cu
->header
.offset_size
;
7292 info_ptr
+= cu
->header
.addr_size
;
7299 case DW_FORM_flag_present
:
7311 case DW_FORM_ref_sig8
:
7314 case DW_FORM_string
:
7315 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7316 info_ptr
+= bytes_read
;
7318 case DW_FORM_sec_offset
:
7320 case DW_FORM_GNU_strp_alt
:
7321 info_ptr
+= cu
->header
.offset_size
;
7323 case DW_FORM_exprloc
:
7325 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7326 info_ptr
+= bytes_read
;
7328 case DW_FORM_block1
:
7329 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7331 case DW_FORM_block2
:
7332 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7334 case DW_FORM_block4
:
7335 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7339 case DW_FORM_ref_udata
:
7340 case DW_FORM_GNU_addr_index
:
7341 case DW_FORM_GNU_str_index
:
7342 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7344 case DW_FORM_indirect
:
7345 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7346 info_ptr
+= bytes_read
;
7347 /* We need to continue parsing from here, so just go back to
7349 goto skip_attribute
;
7352 error (_("Dwarf Error: Cannot handle %s "
7353 "in DWARF reader [in module %s]"),
7354 dwarf_form_name (form
),
7355 bfd_get_filename (abfd
));
7359 if (abbrev
->has_children
)
7360 return skip_children (reader
, info_ptr
);
7365 /* Locate ORIG_PDI's sibling.
7366 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7368 static const gdb_byte
*
7369 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7370 struct partial_die_info
*orig_pdi
,
7371 const gdb_byte
*info_ptr
)
7373 /* Do we know the sibling already? */
7375 if (orig_pdi
->sibling
)
7376 return orig_pdi
->sibling
;
7378 /* Are there any children to deal with? */
7380 if (!orig_pdi
->has_children
)
7383 /* Skip the children the long way. */
7385 return skip_children (reader
, info_ptr
);
7388 /* Expand this partial symbol table into a full symbol table. SELF is
7392 dwarf2_read_symtab (struct partial_symtab
*self
,
7393 struct objfile
*objfile
)
7397 warning (_("bug: psymtab for %s is already read in."),
7404 printf_filtered (_("Reading in symbols for %s..."),
7406 gdb_flush (gdb_stdout
);
7409 /* Restore our global data. */
7410 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7412 /* If this psymtab is constructed from a debug-only objfile, the
7413 has_section_at_zero flag will not necessarily be correct. We
7414 can get the correct value for this flag by looking at the data
7415 associated with the (presumably stripped) associated objfile. */
7416 if (objfile
->separate_debug_objfile_backlink
)
7418 struct dwarf2_per_objfile
*dpo_backlink
7419 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7420 dwarf2_objfile_data_key
);
7422 dwarf2_per_objfile
->has_section_at_zero
7423 = dpo_backlink
->has_section_at_zero
;
7426 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7428 psymtab_to_symtab_1 (self
);
7430 /* Finish up the debug error message. */
7432 printf_filtered (_("done.\n"));
7435 process_cu_includes ();
7438 /* Reading in full CUs. */
7440 /* Add PER_CU to the queue. */
7443 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7444 enum language pretend_language
)
7446 struct dwarf2_queue_item
*item
;
7449 item
= xmalloc (sizeof (*item
));
7450 item
->per_cu
= per_cu
;
7451 item
->pretend_language
= pretend_language
;
7454 if (dwarf2_queue
== NULL
)
7455 dwarf2_queue
= item
;
7457 dwarf2_queue_tail
->next
= item
;
7459 dwarf2_queue_tail
= item
;
7462 /* If PER_CU is not yet queued, add it to the queue.
7463 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7465 The result is non-zero if PER_CU was queued, otherwise the result is zero
7466 meaning either PER_CU is already queued or it is already loaded.
7468 N.B. There is an invariant here that if a CU is queued then it is loaded.
7469 The caller is required to load PER_CU if we return non-zero. */
7472 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7473 struct dwarf2_per_cu_data
*per_cu
,
7474 enum language pretend_language
)
7476 /* We may arrive here during partial symbol reading, if we need full
7477 DIEs to process an unusual case (e.g. template arguments). Do
7478 not queue PER_CU, just tell our caller to load its DIEs. */
7479 if (dwarf2_per_objfile
->reading_partial_symbols
)
7481 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7486 /* Mark the dependence relation so that we don't flush PER_CU
7488 if (dependent_cu
!= NULL
)
7489 dwarf2_add_dependence (dependent_cu
, per_cu
);
7491 /* If it's already on the queue, we have nothing to do. */
7495 /* If the compilation unit is already loaded, just mark it as
7497 if (per_cu
->cu
!= NULL
)
7499 per_cu
->cu
->last_used
= 0;
7503 /* Add it to the queue. */
7504 queue_comp_unit (per_cu
, pretend_language
);
7509 /* Process the queue. */
7512 process_queue (void)
7514 struct dwarf2_queue_item
*item
, *next_item
;
7516 if (dwarf2_read_debug
)
7518 fprintf_unfiltered (gdb_stdlog
,
7519 "Expanding one or more symtabs of objfile %s ...\n",
7520 objfile_name (dwarf2_per_objfile
->objfile
));
7523 /* The queue starts out with one item, but following a DIE reference
7524 may load a new CU, adding it to the end of the queue. */
7525 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7527 if (dwarf2_per_objfile
->using_index
7528 ? !item
->per_cu
->v
.quick
->compunit_symtab
7529 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7531 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7532 unsigned int debug_print_threshold
;
7535 if (per_cu
->is_debug_types
)
7537 struct signatured_type
*sig_type
=
7538 (struct signatured_type
*) per_cu
;
7540 sprintf (buf
, "TU %s at offset 0x%x",
7541 hex_string (sig_type
->signature
),
7542 per_cu
->offset
.sect_off
);
7543 /* There can be 100s of TUs.
7544 Only print them in verbose mode. */
7545 debug_print_threshold
= 2;
7549 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7550 debug_print_threshold
= 1;
7553 if (dwarf2_read_debug
>= debug_print_threshold
)
7554 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7556 if (per_cu
->is_debug_types
)
7557 process_full_type_unit (per_cu
, item
->pretend_language
);
7559 process_full_comp_unit (per_cu
, item
->pretend_language
);
7561 if (dwarf2_read_debug
>= debug_print_threshold
)
7562 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7565 item
->per_cu
->queued
= 0;
7566 next_item
= item
->next
;
7570 dwarf2_queue_tail
= NULL
;
7572 if (dwarf2_read_debug
)
7574 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7575 objfile_name (dwarf2_per_objfile
->objfile
));
7579 /* Free all allocated queue entries. This function only releases anything if
7580 an error was thrown; if the queue was processed then it would have been
7581 freed as we went along. */
7584 dwarf2_release_queue (void *dummy
)
7586 struct dwarf2_queue_item
*item
, *last
;
7588 item
= dwarf2_queue
;
7591 /* Anything still marked queued is likely to be in an
7592 inconsistent state, so discard it. */
7593 if (item
->per_cu
->queued
)
7595 if (item
->per_cu
->cu
!= NULL
)
7596 free_one_cached_comp_unit (item
->per_cu
);
7597 item
->per_cu
->queued
= 0;
7605 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7608 /* Read in full symbols for PST, and anything it depends on. */
7611 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7613 struct dwarf2_per_cu_data
*per_cu
;
7619 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7620 if (!pst
->dependencies
[i
]->readin
7621 && pst
->dependencies
[i
]->user
== NULL
)
7623 /* Inform about additional files that need to be read in. */
7626 /* FIXME: i18n: Need to make this a single string. */
7627 fputs_filtered (" ", gdb_stdout
);
7629 fputs_filtered ("and ", gdb_stdout
);
7631 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7632 wrap_here (""); /* Flush output. */
7633 gdb_flush (gdb_stdout
);
7635 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7638 per_cu
= pst
->read_symtab_private
;
7642 /* It's an include file, no symbols to read for it.
7643 Everything is in the parent symtab. */
7648 dw2_do_instantiate_symtab (per_cu
);
7651 /* Trivial hash function for die_info: the hash value of a DIE
7652 is its offset in .debug_info for this objfile. */
7655 die_hash (const void *item
)
7657 const struct die_info
*die
= item
;
7659 return die
->offset
.sect_off
;
7662 /* Trivial comparison function for die_info structures: two DIEs
7663 are equal if they have the same offset. */
7666 die_eq (const void *item_lhs
, const void *item_rhs
)
7668 const struct die_info
*die_lhs
= item_lhs
;
7669 const struct die_info
*die_rhs
= item_rhs
;
7671 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7674 /* die_reader_func for load_full_comp_unit.
7675 This is identical to read_signatured_type_reader,
7676 but is kept separate for now. */
7679 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7680 const gdb_byte
*info_ptr
,
7681 struct die_info
*comp_unit_die
,
7685 struct dwarf2_cu
*cu
= reader
->cu
;
7686 enum language
*language_ptr
= data
;
7688 gdb_assert (cu
->die_hash
== NULL
);
7690 htab_create_alloc_ex (cu
->header
.length
/ 12,
7694 &cu
->comp_unit_obstack
,
7695 hashtab_obstack_allocate
,
7696 dummy_obstack_deallocate
);
7699 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7700 &info_ptr
, comp_unit_die
);
7701 cu
->dies
= comp_unit_die
;
7702 /* comp_unit_die is not stored in die_hash, no need. */
7704 /* We try not to read any attributes in this function, because not
7705 all CUs needed for references have been loaded yet, and symbol
7706 table processing isn't initialized. But we have to set the CU language,
7707 or we won't be able to build types correctly.
7708 Similarly, if we do not read the producer, we can not apply
7709 producer-specific interpretation. */
7710 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7713 /* Load the DIEs associated with PER_CU into memory. */
7716 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7717 enum language pretend_language
)
7719 gdb_assert (! this_cu
->is_debug_types
);
7721 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7722 load_full_comp_unit_reader
, &pretend_language
);
7725 /* Add a DIE to the delayed physname list. */
7728 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7729 const char *name
, struct die_info
*die
,
7730 struct dwarf2_cu
*cu
)
7732 struct delayed_method_info mi
;
7734 mi
.fnfield_index
= fnfield_index
;
7738 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7741 /* A cleanup for freeing the delayed method list. */
7744 free_delayed_list (void *ptr
)
7746 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7747 if (cu
->method_list
!= NULL
)
7749 VEC_free (delayed_method_info
, cu
->method_list
);
7750 cu
->method_list
= NULL
;
7754 /* Compute the physnames of any methods on the CU's method list.
7756 The computation of method physnames is delayed in order to avoid the
7757 (bad) condition that one of the method's formal parameters is of an as yet
7761 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7764 struct delayed_method_info
*mi
;
7765 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7767 const char *physname
;
7768 struct fn_fieldlist
*fn_flp
7769 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7770 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7771 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7772 = physname
? physname
: "";
7776 /* Go objects should be embedded in a DW_TAG_module DIE,
7777 and it's not clear if/how imported objects will appear.
7778 To keep Go support simple until that's worked out,
7779 go back through what we've read and create something usable.
7780 We could do this while processing each DIE, and feels kinda cleaner,
7781 but that way is more invasive.
7782 This is to, for example, allow the user to type "p var" or "b main"
7783 without having to specify the package name, and allow lookups
7784 of module.object to work in contexts that use the expression
7788 fixup_go_packaging (struct dwarf2_cu
*cu
)
7790 char *package_name
= NULL
;
7791 struct pending
*list
;
7794 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7796 for (i
= 0; i
< list
->nsyms
; ++i
)
7798 struct symbol
*sym
= list
->symbol
[i
];
7800 if (SYMBOL_LANGUAGE (sym
) == language_go
7801 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7803 char *this_package_name
= go_symbol_package_name (sym
);
7805 if (this_package_name
== NULL
)
7807 if (package_name
== NULL
)
7808 package_name
= this_package_name
;
7811 if (strcmp (package_name
, this_package_name
) != 0)
7812 complaint (&symfile_complaints
,
7813 _("Symtab %s has objects from two different Go packages: %s and %s"),
7814 (symbol_symtab (sym
) != NULL
7815 ? symtab_to_filename_for_display
7816 (symbol_symtab (sym
))
7817 : objfile_name (cu
->objfile
)),
7818 this_package_name
, package_name
);
7819 xfree (this_package_name
);
7825 if (package_name
!= NULL
)
7827 struct objfile
*objfile
= cu
->objfile
;
7828 const char *saved_package_name
7829 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7831 strlen (package_name
));
7832 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7833 saved_package_name
, objfile
);
7836 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7838 sym
= allocate_symbol (objfile
);
7839 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7840 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7841 strlen (saved_package_name
), 0, objfile
);
7842 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7843 e.g., "main" finds the "main" module and not C's main(). */
7844 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7845 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7846 SYMBOL_TYPE (sym
) = type
;
7848 add_symbol_to_list (sym
, &global_symbols
);
7850 xfree (package_name
);
7854 /* Return the symtab for PER_CU. This works properly regardless of
7855 whether we're using the index or psymtabs. */
7857 static struct compunit_symtab
*
7858 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7860 return (dwarf2_per_objfile
->using_index
7861 ? per_cu
->v
.quick
->compunit_symtab
7862 : per_cu
->v
.psymtab
->compunit_symtab
);
7865 /* A helper function for computing the list of all symbol tables
7866 included by PER_CU. */
7869 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7870 htab_t all_children
, htab_t all_type_symtabs
,
7871 struct dwarf2_per_cu_data
*per_cu
,
7872 struct compunit_symtab
*immediate_parent
)
7876 struct compunit_symtab
*cust
;
7877 struct dwarf2_per_cu_data
*iter
;
7879 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7882 /* This inclusion and its children have been processed. */
7887 /* Only add a CU if it has a symbol table. */
7888 cust
= get_compunit_symtab (per_cu
);
7891 /* If this is a type unit only add its symbol table if we haven't
7892 seen it yet (type unit per_cu's can share symtabs). */
7893 if (per_cu
->is_debug_types
)
7895 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7899 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7900 if (cust
->user
== NULL
)
7901 cust
->user
= immediate_parent
;
7906 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7907 if (cust
->user
== NULL
)
7908 cust
->user
= immediate_parent
;
7913 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7916 recursively_compute_inclusions (result
, all_children
,
7917 all_type_symtabs
, iter
, cust
);
7921 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7925 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7927 gdb_assert (! per_cu
->is_debug_types
);
7929 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7932 struct dwarf2_per_cu_data
*per_cu_iter
;
7933 struct compunit_symtab
*compunit_symtab_iter
;
7934 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7935 htab_t all_children
, all_type_symtabs
;
7936 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7938 /* If we don't have a symtab, we can just skip this case. */
7942 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7943 NULL
, xcalloc
, xfree
);
7944 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7945 NULL
, xcalloc
, xfree
);
7948 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7952 recursively_compute_inclusions (&result_symtabs
, all_children
,
7953 all_type_symtabs
, per_cu_iter
,
7957 /* Now we have a transitive closure of all the included symtabs. */
7958 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7960 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7961 (len
+ 1) * sizeof (struct symtab
*));
7963 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7964 compunit_symtab_iter
);
7966 cust
->includes
[ix
] = compunit_symtab_iter
;
7967 cust
->includes
[len
] = NULL
;
7969 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7970 htab_delete (all_children
);
7971 htab_delete (all_type_symtabs
);
7975 /* Compute the 'includes' field for the symtabs of all the CUs we just
7979 process_cu_includes (void)
7982 struct dwarf2_per_cu_data
*iter
;
7985 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7989 if (! iter
->is_debug_types
)
7990 compute_compunit_symtab_includes (iter
);
7993 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7996 /* Generate full symbol information for PER_CU, whose DIEs have
7997 already been loaded into memory. */
8000 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8001 enum language pretend_language
)
8003 struct dwarf2_cu
*cu
= per_cu
->cu
;
8004 struct objfile
*objfile
= per_cu
->objfile
;
8005 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8006 CORE_ADDR lowpc
, highpc
;
8007 struct compunit_symtab
*cust
;
8008 struct cleanup
*back_to
, *delayed_list_cleanup
;
8010 struct block
*static_block
;
8013 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8016 back_to
= make_cleanup (really_free_pendings
, NULL
);
8017 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8019 cu
->list_in_scope
= &file_symbols
;
8021 cu
->language
= pretend_language
;
8022 cu
->language_defn
= language_def (cu
->language
);
8024 /* Do line number decoding in read_file_scope () */
8025 process_die (cu
->dies
, cu
);
8027 /* For now fudge the Go package. */
8028 if (cu
->language
== language_go
)
8029 fixup_go_packaging (cu
);
8031 /* Now that we have processed all the DIEs in the CU, all the types
8032 should be complete, and it should now be safe to compute all of the
8034 compute_delayed_physnames (cu
);
8035 do_cleanups (delayed_list_cleanup
);
8037 /* Some compilers don't define a DW_AT_high_pc attribute for the
8038 compilation unit. If the DW_AT_high_pc is missing, synthesize
8039 it, by scanning the DIE's below the compilation unit. */
8040 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8042 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8043 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8045 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8046 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8047 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8048 addrmap to help ensure it has an accurate map of pc values belonging to
8050 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8052 cust
= end_symtab_from_static_block (static_block
,
8053 SECT_OFF_TEXT (objfile
), 0);
8057 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8059 /* Set symtab language to language from DW_AT_language. If the
8060 compilation is from a C file generated by language preprocessors, do
8061 not set the language if it was already deduced by start_subfile. */
8062 if (!(cu
->language
== language_c
8063 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8064 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8066 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8067 produce DW_AT_location with location lists but it can be possibly
8068 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8069 there were bugs in prologue debug info, fixed later in GCC-4.5
8070 by "unwind info for epilogues" patch (which is not directly related).
8072 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8073 needed, it would be wrong due to missing DW_AT_producer there.
8075 Still one can confuse GDB by using non-standard GCC compilation
8076 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8078 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8079 cust
->locations_valid
= 1;
8081 if (gcc_4_minor
>= 5)
8082 cust
->epilogue_unwind_valid
= 1;
8084 cust
->call_site_htab
= cu
->call_site_htab
;
8087 if (dwarf2_per_objfile
->using_index
)
8088 per_cu
->v
.quick
->compunit_symtab
= cust
;
8091 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8092 pst
->compunit_symtab
= cust
;
8096 /* Push it for inclusion processing later. */
8097 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8099 do_cleanups (back_to
);
8102 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8103 already been loaded into memory. */
8106 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8107 enum language pretend_language
)
8109 struct dwarf2_cu
*cu
= per_cu
->cu
;
8110 struct objfile
*objfile
= per_cu
->objfile
;
8111 struct compunit_symtab
*cust
;
8112 struct cleanup
*back_to
, *delayed_list_cleanup
;
8113 struct signatured_type
*sig_type
;
8115 gdb_assert (per_cu
->is_debug_types
);
8116 sig_type
= (struct signatured_type
*) per_cu
;
8119 back_to
= make_cleanup (really_free_pendings
, NULL
);
8120 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8122 cu
->list_in_scope
= &file_symbols
;
8124 cu
->language
= pretend_language
;
8125 cu
->language_defn
= language_def (cu
->language
);
8127 /* The symbol tables are set up in read_type_unit_scope. */
8128 process_die (cu
->dies
, cu
);
8130 /* For now fudge the Go package. */
8131 if (cu
->language
== language_go
)
8132 fixup_go_packaging (cu
);
8134 /* Now that we have processed all the DIEs in the CU, all the types
8135 should be complete, and it should now be safe to compute all of the
8137 compute_delayed_physnames (cu
);
8138 do_cleanups (delayed_list_cleanup
);
8140 /* TUs share symbol tables.
8141 If this is the first TU to use this symtab, complete the construction
8142 of it with end_expandable_symtab. Otherwise, complete the addition of
8143 this TU's symbols to the existing symtab. */
8144 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8146 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8147 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8151 /* Set symtab language to language from DW_AT_language. If the
8152 compilation is from a C file generated by language preprocessors,
8153 do not set the language if it was already deduced by
8155 if (!(cu
->language
== language_c
8156 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8157 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8162 augment_type_symtab ();
8163 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8166 if (dwarf2_per_objfile
->using_index
)
8167 per_cu
->v
.quick
->compunit_symtab
= cust
;
8170 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8171 pst
->compunit_symtab
= cust
;
8175 do_cleanups (back_to
);
8178 /* Process an imported unit DIE. */
8181 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8183 struct attribute
*attr
;
8185 /* For now we don't handle imported units in type units. */
8186 if (cu
->per_cu
->is_debug_types
)
8188 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8189 " supported in type units [in module %s]"),
8190 objfile_name (cu
->objfile
));
8193 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8196 struct dwarf2_per_cu_data
*per_cu
;
8197 struct symtab
*imported_symtab
;
8201 offset
= dwarf2_get_ref_die_offset (attr
);
8202 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8203 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8205 /* If necessary, add it to the queue and load its DIEs. */
8206 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8207 load_full_comp_unit (per_cu
, cu
->language
);
8209 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8214 /* Reset the in_process bit of a die. */
8217 reset_die_in_process (void *arg
)
8219 struct die_info
*die
= arg
;
8221 die
->in_process
= 0;
8224 /* Process a die and its children. */
8227 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8229 struct cleanup
*in_process
;
8231 /* We should only be processing those not already in process. */
8232 gdb_assert (!die
->in_process
);
8234 die
->in_process
= 1;
8235 in_process
= make_cleanup (reset_die_in_process
,die
);
8239 case DW_TAG_padding
:
8241 case DW_TAG_compile_unit
:
8242 case DW_TAG_partial_unit
:
8243 read_file_scope (die
, cu
);
8245 case DW_TAG_type_unit
:
8246 read_type_unit_scope (die
, cu
);
8248 case DW_TAG_subprogram
:
8249 case DW_TAG_inlined_subroutine
:
8250 read_func_scope (die
, cu
);
8252 case DW_TAG_lexical_block
:
8253 case DW_TAG_try_block
:
8254 case DW_TAG_catch_block
:
8255 read_lexical_block_scope (die
, cu
);
8257 case DW_TAG_GNU_call_site
:
8258 read_call_site_scope (die
, cu
);
8260 case DW_TAG_class_type
:
8261 case DW_TAG_interface_type
:
8262 case DW_TAG_structure_type
:
8263 case DW_TAG_union_type
:
8264 process_structure_scope (die
, cu
);
8266 case DW_TAG_enumeration_type
:
8267 process_enumeration_scope (die
, cu
);
8270 /* These dies have a type, but processing them does not create
8271 a symbol or recurse to process the children. Therefore we can
8272 read them on-demand through read_type_die. */
8273 case DW_TAG_subroutine_type
:
8274 case DW_TAG_set_type
:
8275 case DW_TAG_array_type
:
8276 case DW_TAG_pointer_type
:
8277 case DW_TAG_ptr_to_member_type
:
8278 case DW_TAG_reference_type
:
8279 case DW_TAG_string_type
:
8282 case DW_TAG_base_type
:
8283 case DW_TAG_subrange_type
:
8284 case DW_TAG_typedef
:
8285 /* Add a typedef symbol for the type definition, if it has a
8287 new_symbol (die
, read_type_die (die
, cu
), cu
);
8289 case DW_TAG_common_block
:
8290 read_common_block (die
, cu
);
8292 case DW_TAG_common_inclusion
:
8294 case DW_TAG_namespace
:
8295 cu
->processing_has_namespace_info
= 1;
8296 read_namespace (die
, cu
);
8299 cu
->processing_has_namespace_info
= 1;
8300 read_module (die
, cu
);
8302 case DW_TAG_imported_declaration
:
8303 cu
->processing_has_namespace_info
= 1;
8304 if (read_namespace_alias (die
, cu
))
8306 /* The declaration is not a global namespace alias: fall through. */
8307 case DW_TAG_imported_module
:
8308 cu
->processing_has_namespace_info
= 1;
8309 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8310 || cu
->language
!= language_fortran
))
8311 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8312 dwarf_tag_name (die
->tag
));
8313 read_import_statement (die
, cu
);
8316 case DW_TAG_imported_unit
:
8317 process_imported_unit_die (die
, cu
);
8321 new_symbol (die
, NULL
, cu
);
8325 do_cleanups (in_process
);
8328 /* DWARF name computation. */
8330 /* A helper function for dwarf2_compute_name which determines whether DIE
8331 needs to have the name of the scope prepended to the name listed in the
8335 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8337 struct attribute
*attr
;
8341 case DW_TAG_namespace
:
8342 case DW_TAG_typedef
:
8343 case DW_TAG_class_type
:
8344 case DW_TAG_interface_type
:
8345 case DW_TAG_structure_type
:
8346 case DW_TAG_union_type
:
8347 case DW_TAG_enumeration_type
:
8348 case DW_TAG_enumerator
:
8349 case DW_TAG_subprogram
:
8351 case DW_TAG_imported_declaration
:
8354 case DW_TAG_variable
:
8355 case DW_TAG_constant
:
8356 /* We only need to prefix "globally" visible variables. These include
8357 any variable marked with DW_AT_external or any variable that
8358 lives in a namespace. [Variables in anonymous namespaces
8359 require prefixing, but they are not DW_AT_external.] */
8361 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8363 struct dwarf2_cu
*spec_cu
= cu
;
8365 return die_needs_namespace (die_specification (die
, &spec_cu
),
8369 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8370 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8371 && die
->parent
->tag
!= DW_TAG_module
)
8373 /* A variable in a lexical block of some kind does not need a
8374 namespace, even though in C++ such variables may be external
8375 and have a mangled name. */
8376 if (die
->parent
->tag
== DW_TAG_lexical_block
8377 || die
->parent
->tag
== DW_TAG_try_block
8378 || die
->parent
->tag
== DW_TAG_catch_block
8379 || die
->parent
->tag
== DW_TAG_subprogram
)
8388 /* Retrieve the last character from a mem_file. */
8391 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8393 char *last_char_p
= (char *) object
;
8396 *last_char_p
= buffer
[length
- 1];
8399 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8400 compute the physname for the object, which include a method's:
8401 - formal parameters (C++/Java),
8402 - receiver type (Go),
8403 - return type (Java).
8405 The term "physname" is a bit confusing.
8406 For C++, for example, it is the demangled name.
8407 For Go, for example, it's the mangled name.
8409 For Ada, return the DIE's linkage name rather than the fully qualified
8410 name. PHYSNAME is ignored..
8412 The result is allocated on the objfile_obstack and canonicalized. */
8415 dwarf2_compute_name (const char *name
,
8416 struct die_info
*die
, struct dwarf2_cu
*cu
,
8419 struct objfile
*objfile
= cu
->objfile
;
8422 name
= dwarf2_name (die
, cu
);
8424 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8425 compute it by typename_concat inside GDB. */
8426 if (cu
->language
== language_ada
8427 || (cu
->language
== language_fortran
&& physname
))
8429 /* For Ada unit, we prefer the linkage name over the name, as
8430 the former contains the exported name, which the user expects
8431 to be able to reference. Ideally, we want the user to be able
8432 to reference this entity using either natural or linkage name,
8433 but we haven't started looking at this enhancement yet. */
8434 struct attribute
*attr
;
8436 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8438 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8439 if (attr
&& DW_STRING (attr
))
8440 return DW_STRING (attr
);
8443 /* These are the only languages we know how to qualify names in. */
8445 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8446 || cu
->language
== language_fortran
))
8448 if (die_needs_namespace (die
, cu
))
8452 struct ui_file
*buf
;
8453 char *intermediate_name
;
8454 const char *canonical_name
= NULL
;
8456 prefix
= determine_prefix (die
, cu
);
8457 buf
= mem_fileopen ();
8458 if (*prefix
!= '\0')
8460 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8463 fputs_unfiltered (prefixed_name
, buf
);
8464 xfree (prefixed_name
);
8467 fputs_unfiltered (name
, buf
);
8469 /* Template parameters may be specified in the DIE's DW_AT_name, or
8470 as children with DW_TAG_template_type_param or
8471 DW_TAG_value_type_param. If the latter, add them to the name
8472 here. If the name already has template parameters, then
8473 skip this step; some versions of GCC emit both, and
8474 it is more efficient to use the pre-computed name.
8476 Something to keep in mind about this process: it is very
8477 unlikely, or in some cases downright impossible, to produce
8478 something that will match the mangled name of a function.
8479 If the definition of the function has the same debug info,
8480 we should be able to match up with it anyway. But fallbacks
8481 using the minimal symbol, for instance to find a method
8482 implemented in a stripped copy of libstdc++, will not work.
8483 If we do not have debug info for the definition, we will have to
8484 match them up some other way.
8486 When we do name matching there is a related problem with function
8487 templates; two instantiated function templates are allowed to
8488 differ only by their return types, which we do not add here. */
8490 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8492 struct attribute
*attr
;
8493 struct die_info
*child
;
8496 die
->building_fullname
= 1;
8498 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8502 const gdb_byte
*bytes
;
8503 struct dwarf2_locexpr_baton
*baton
;
8506 if (child
->tag
!= DW_TAG_template_type_param
8507 && child
->tag
!= DW_TAG_template_value_param
)
8512 fputs_unfiltered ("<", buf
);
8516 fputs_unfiltered (", ", buf
);
8518 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8521 complaint (&symfile_complaints
,
8522 _("template parameter missing DW_AT_type"));
8523 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8526 type
= die_type (child
, cu
);
8528 if (child
->tag
== DW_TAG_template_type_param
)
8530 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8534 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8537 complaint (&symfile_complaints
,
8538 _("template parameter missing "
8539 "DW_AT_const_value"));
8540 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8544 dwarf2_const_value_attr (attr
, type
, name
,
8545 &cu
->comp_unit_obstack
, cu
,
8546 &value
, &bytes
, &baton
);
8548 if (TYPE_NOSIGN (type
))
8549 /* GDB prints characters as NUMBER 'CHAR'. If that's
8550 changed, this can use value_print instead. */
8551 c_printchar (value
, type
, buf
);
8554 struct value_print_options opts
;
8557 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8561 else if (bytes
!= NULL
)
8563 v
= allocate_value (type
);
8564 memcpy (value_contents_writeable (v
), bytes
,
8565 TYPE_LENGTH (type
));
8568 v
= value_from_longest (type
, value
);
8570 /* Specify decimal so that we do not depend on
8572 get_formatted_print_options (&opts
, 'd');
8574 value_print (v
, buf
, &opts
);
8580 die
->building_fullname
= 0;
8584 /* Close the argument list, with a space if necessary
8585 (nested templates). */
8586 char last_char
= '\0';
8587 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8588 if (last_char
== '>')
8589 fputs_unfiltered (" >", buf
);
8591 fputs_unfiltered (">", buf
);
8595 /* For Java and C++ methods, append formal parameter type
8596 information, if PHYSNAME. */
8598 if (physname
&& die
->tag
== DW_TAG_subprogram
8599 && (cu
->language
== language_cplus
8600 || cu
->language
== language_java
))
8602 struct type
*type
= read_type_die (die
, cu
);
8604 c_type_print_args (type
, buf
, 1, cu
->language
,
8605 &type_print_raw_options
);
8607 if (cu
->language
== language_java
)
8609 /* For java, we must append the return type to method
8611 if (die
->tag
== DW_TAG_subprogram
)
8612 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8613 0, 0, &type_print_raw_options
);
8615 else if (cu
->language
== language_cplus
)
8617 /* Assume that an artificial first parameter is
8618 "this", but do not crash if it is not. RealView
8619 marks unnamed (and thus unused) parameters as
8620 artificial; there is no way to differentiate
8622 if (TYPE_NFIELDS (type
) > 0
8623 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8624 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8625 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8627 fputs_unfiltered (" const", buf
);
8631 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8632 ui_file_delete (buf
);
8634 if (cu
->language
== language_cplus
)
8636 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8637 &objfile
->per_bfd
->storage_obstack
);
8639 /* If we only computed INTERMEDIATE_NAME, or if
8640 INTERMEDIATE_NAME is already canonical, then we need to
8641 copy it to the appropriate obstack. */
8642 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8643 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8645 strlen (intermediate_name
));
8647 name
= canonical_name
;
8649 xfree (intermediate_name
);
8656 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8657 If scope qualifiers are appropriate they will be added. The result
8658 will be allocated on the storage_obstack, or NULL if the DIE does
8659 not have a name. NAME may either be from a previous call to
8660 dwarf2_name or NULL.
8662 The output string will be canonicalized (if C++/Java). */
8665 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8667 return dwarf2_compute_name (name
, die
, cu
, 0);
8670 /* Construct a physname for the given DIE in CU. NAME may either be
8671 from a previous call to dwarf2_name or NULL. The result will be
8672 allocated on the objfile_objstack or NULL if the DIE does not have a
8675 The output string will be canonicalized (if C++/Java). */
8678 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8680 struct objfile
*objfile
= cu
->objfile
;
8681 struct attribute
*attr
;
8682 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8683 struct cleanup
*back_to
;
8686 /* In this case dwarf2_compute_name is just a shortcut not building anything
8688 if (!die_needs_namespace (die
, cu
))
8689 return dwarf2_compute_name (name
, die
, cu
, 1);
8691 back_to
= make_cleanup (null_cleanup
, NULL
);
8693 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8695 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8697 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8699 if (attr
&& DW_STRING (attr
))
8703 mangled
= DW_STRING (attr
);
8705 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8706 type. It is easier for GDB users to search for such functions as
8707 `name(params)' than `long name(params)'. In such case the minimal
8708 symbol names do not match the full symbol names but for template
8709 functions there is never a need to look up their definition from their
8710 declaration so the only disadvantage remains the minimal symbol
8711 variant `long name(params)' does not have the proper inferior type.
8714 if (cu
->language
== language_go
)
8716 /* This is a lie, but we already lie to the caller new_symbol_full.
8717 new_symbol_full assumes we return the mangled name.
8718 This just undoes that lie until things are cleaned up. */
8723 demangled
= gdb_demangle (mangled
,
8724 (DMGL_PARAMS
| DMGL_ANSI
8725 | (cu
->language
== language_java
8726 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8731 make_cleanup (xfree
, demangled
);
8741 if (canon
== NULL
|| check_physname
)
8743 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8745 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8747 /* It may not mean a bug in GDB. The compiler could also
8748 compute DW_AT_linkage_name incorrectly. But in such case
8749 GDB would need to be bug-to-bug compatible. */
8751 complaint (&symfile_complaints
,
8752 _("Computed physname <%s> does not match demangled <%s> "
8753 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8754 physname
, canon
, mangled
, die
->offset
.sect_off
,
8755 objfile_name (objfile
));
8757 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8758 is available here - over computed PHYSNAME. It is safer
8759 against both buggy GDB and buggy compilers. */
8773 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8774 retval
, strlen (retval
));
8776 do_cleanups (back_to
);
8780 /* Inspect DIE in CU for a namespace alias. If one exists, record
8781 a new symbol for it.
8783 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8786 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8788 struct attribute
*attr
;
8790 /* If the die does not have a name, this is not a namespace
8792 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8796 struct die_info
*d
= die
;
8797 struct dwarf2_cu
*imported_cu
= cu
;
8799 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8800 keep inspecting DIEs until we hit the underlying import. */
8801 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8802 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8804 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8808 d
= follow_die_ref (d
, attr
, &imported_cu
);
8809 if (d
->tag
!= DW_TAG_imported_declaration
)
8813 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8815 complaint (&symfile_complaints
,
8816 _("DIE at 0x%x has too many recursively imported "
8817 "declarations"), d
->offset
.sect_off
);
8824 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8826 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8827 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8829 /* This declaration is a global namespace alias. Add
8830 a symbol for it whose type is the aliased namespace. */
8831 new_symbol (die
, type
, cu
);
8840 /* Read the import statement specified by the given die and record it. */
8843 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8845 struct objfile
*objfile
= cu
->objfile
;
8846 struct attribute
*import_attr
;
8847 struct die_info
*imported_die
, *child_die
;
8848 struct dwarf2_cu
*imported_cu
;
8849 const char *imported_name
;
8850 const char *imported_name_prefix
;
8851 const char *canonical_name
;
8852 const char *import_alias
;
8853 const char *imported_declaration
= NULL
;
8854 const char *import_prefix
;
8855 VEC (const_char_ptr
) *excludes
= NULL
;
8856 struct cleanup
*cleanups
;
8858 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8859 if (import_attr
== NULL
)
8861 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8862 dwarf_tag_name (die
->tag
));
8867 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8868 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8869 if (imported_name
== NULL
)
8871 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8873 The import in the following code:
8887 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8888 <52> DW_AT_decl_file : 1
8889 <53> DW_AT_decl_line : 6
8890 <54> DW_AT_import : <0x75>
8891 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8893 <5b> DW_AT_decl_file : 1
8894 <5c> DW_AT_decl_line : 2
8895 <5d> DW_AT_type : <0x6e>
8897 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8898 <76> DW_AT_byte_size : 4
8899 <77> DW_AT_encoding : 5 (signed)
8901 imports the wrong die ( 0x75 instead of 0x58 ).
8902 This case will be ignored until the gcc bug is fixed. */
8906 /* Figure out the local name after import. */
8907 import_alias
= dwarf2_name (die
, cu
);
8909 /* Figure out where the statement is being imported to. */
8910 import_prefix
= determine_prefix (die
, cu
);
8912 /* Figure out what the scope of the imported die is and prepend it
8913 to the name of the imported die. */
8914 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8916 if (imported_die
->tag
!= DW_TAG_namespace
8917 && imported_die
->tag
!= DW_TAG_module
)
8919 imported_declaration
= imported_name
;
8920 canonical_name
= imported_name_prefix
;
8922 else if (strlen (imported_name_prefix
) > 0)
8923 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8924 imported_name_prefix
, "::", imported_name
,
8927 canonical_name
= imported_name
;
8929 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8931 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8932 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8933 child_die
= sibling_die (child_die
))
8935 /* DWARF-4: A Fortran use statement with a “rename list” may be
8936 represented by an imported module entry with an import attribute
8937 referring to the module and owned entries corresponding to those
8938 entities that are renamed as part of being imported. */
8940 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8942 complaint (&symfile_complaints
,
8943 _("child DW_TAG_imported_declaration expected "
8944 "- DIE at 0x%x [in module %s]"),
8945 child_die
->offset
.sect_off
, objfile_name (objfile
));
8949 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8950 if (import_attr
== NULL
)
8952 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8953 dwarf_tag_name (child_die
->tag
));
8958 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8960 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8961 if (imported_name
== NULL
)
8963 complaint (&symfile_complaints
,
8964 _("child DW_TAG_imported_declaration has unknown "
8965 "imported name - DIE at 0x%x [in module %s]"),
8966 child_die
->offset
.sect_off
, objfile_name (objfile
));
8970 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8972 process_die (child_die
, cu
);
8975 cp_add_using_directive (import_prefix
,
8978 imported_declaration
,
8981 &objfile
->objfile_obstack
);
8983 do_cleanups (cleanups
);
8986 /* Cleanup function for handle_DW_AT_stmt_list. */
8989 free_cu_line_header (void *arg
)
8991 struct dwarf2_cu
*cu
= arg
;
8993 free_line_header (cu
->line_header
);
8994 cu
->line_header
= NULL
;
8997 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8998 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8999 this, it was first present in GCC release 4.3.0. */
9002 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9004 if (!cu
->checked_producer
)
9005 check_producer (cu
);
9007 return cu
->producer_is_gcc_lt_4_3
;
9011 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9012 const char **name
, const char **comp_dir
)
9014 struct attribute
*attr
;
9019 /* Find the filename. Do not use dwarf2_name here, since the filename
9020 is not a source language identifier. */
9021 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9024 *name
= DW_STRING (attr
);
9027 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9029 *comp_dir
= DW_STRING (attr
);
9030 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9031 && IS_ABSOLUTE_PATH (*name
))
9033 char *d
= ldirname (*name
);
9037 make_cleanup (xfree
, d
);
9039 if (*comp_dir
!= NULL
)
9041 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9042 directory, get rid of it. */
9043 char *cp
= strchr (*comp_dir
, ':');
9045 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9050 *name
= "<unknown>";
9053 /* Handle DW_AT_stmt_list for a compilation unit.
9054 DIE is the DW_TAG_compile_unit die for CU.
9055 COMP_DIR is the compilation directory. LOWPC is passed to
9056 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9059 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9060 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9062 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9063 struct attribute
*attr
;
9064 unsigned int line_offset
;
9065 struct line_header line_header_local
;
9066 hashval_t line_header_local_hash
;
9071 gdb_assert (! cu
->per_cu
->is_debug_types
);
9073 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9077 line_offset
= DW_UNSND (attr
);
9079 /* The line header hash table is only created if needed (it exists to
9080 prevent redundant reading of the line table for partial_units).
9081 If we're given a partial_unit, we'll need it. If we're given a
9082 compile_unit, then use the line header hash table if it's already
9083 created, but don't create one just yet. */
9085 if (dwarf2_per_objfile
->line_header_hash
== NULL
9086 && die
->tag
== DW_TAG_partial_unit
)
9088 dwarf2_per_objfile
->line_header_hash
9089 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9090 line_header_eq_voidp
,
9091 free_line_header_voidp
,
9092 &objfile
->objfile_obstack
,
9093 hashtab_obstack_allocate
,
9094 dummy_obstack_deallocate
);
9097 line_header_local
.offset
.sect_off
= line_offset
;
9098 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9099 line_header_local_hash
= line_header_hash (&line_header_local
);
9100 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9102 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9104 line_header_local_hash
, NO_INSERT
);
9106 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9107 is not present in *SLOT (since if there is something in *SLOT then
9108 it will be for a partial_unit). */
9109 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9111 gdb_assert (*slot
!= NULL
);
9112 cu
->line_header
= *slot
;
9117 /* dwarf_decode_line_header does not yet provide sufficient information.
9118 We always have to call also dwarf_decode_lines for it. */
9119 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9120 if (cu
->line_header
== NULL
)
9123 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9127 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9129 line_header_local_hash
, INSERT
);
9130 gdb_assert (slot
!= NULL
);
9132 if (slot
!= NULL
&& *slot
== NULL
)
9134 /* This newly decoded line number information unit will be owned
9135 by line_header_hash hash table. */
9136 *slot
= cu
->line_header
;
9140 /* We cannot free any current entry in (*slot) as that struct line_header
9141 may be already used by multiple CUs. Create only temporary decoded
9142 line_header for this CU - it may happen at most once for each line
9143 number information unit. And if we're not using line_header_hash
9144 then this is what we want as well. */
9145 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9146 make_cleanup (free_cu_line_header
, cu
);
9148 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9149 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9153 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9156 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9158 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9159 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9160 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9161 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9162 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9163 struct attribute
*attr
;
9164 const char *name
= NULL
;
9165 const char *comp_dir
= NULL
;
9166 struct die_info
*child_die
;
9167 bfd
*abfd
= objfile
->obfd
;
9170 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9172 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9174 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9175 from finish_block. */
9176 if (lowpc
== ((CORE_ADDR
) -1))
9178 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9180 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9182 prepare_one_comp_unit (cu
, die
, cu
->language
);
9184 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9185 standardised yet. As a workaround for the language detection we fall
9186 back to the DW_AT_producer string. */
9187 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9188 cu
->language
= language_opencl
;
9190 /* Similar hack for Go. */
9191 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9192 set_cu_language (DW_LANG_Go
, cu
);
9194 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9196 /* Decode line number information if present. We do this before
9197 processing child DIEs, so that the line header table is available
9198 for DW_AT_decl_file. */
9199 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9201 /* Process all dies in compilation unit. */
9202 if (die
->child
!= NULL
)
9204 child_die
= die
->child
;
9205 while (child_die
&& child_die
->tag
)
9207 process_die (child_die
, cu
);
9208 child_die
= sibling_die (child_die
);
9212 /* Decode macro information, if present. Dwarf 2 macro information
9213 refers to information in the line number info statement program
9214 header, so we can only read it if we've read the header
9216 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9217 if (attr
&& cu
->line_header
)
9219 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9220 complaint (&symfile_complaints
,
9221 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9223 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9227 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9228 if (attr
&& cu
->line_header
)
9230 unsigned int macro_offset
= DW_UNSND (attr
);
9232 dwarf_decode_macros (cu
, macro_offset
, 0);
9236 do_cleanups (back_to
);
9239 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9240 Create the set of symtabs used by this TU, or if this TU is sharing
9241 symtabs with another TU and the symtabs have already been created
9242 then restore those symtabs in the line header.
9243 We don't need the pc/line-number mapping for type units. */
9246 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9248 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9249 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9250 struct type_unit_group
*tu_group
;
9252 struct line_header
*lh
;
9253 struct attribute
*attr
;
9254 unsigned int i
, line_offset
;
9255 struct signatured_type
*sig_type
;
9257 gdb_assert (per_cu
->is_debug_types
);
9258 sig_type
= (struct signatured_type
*) per_cu
;
9260 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9262 /* If we're using .gdb_index (includes -readnow) then
9263 per_cu->type_unit_group may not have been set up yet. */
9264 if (sig_type
->type_unit_group
== NULL
)
9265 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9266 tu_group
= sig_type
->type_unit_group
;
9268 /* If we've already processed this stmt_list there's no real need to
9269 do it again, we could fake it and just recreate the part we need
9270 (file name,index -> symtab mapping). If data shows this optimization
9271 is useful we can do it then. */
9272 first_time
= tu_group
->compunit_symtab
== NULL
;
9274 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9279 line_offset
= DW_UNSND (attr
);
9280 lh
= dwarf_decode_line_header (line_offset
, cu
);
9285 dwarf2_start_symtab (cu
, "", NULL
, 0);
9288 gdb_assert (tu_group
->symtabs
== NULL
);
9289 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9294 cu
->line_header
= lh
;
9295 make_cleanup (free_cu_line_header
, cu
);
9299 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9301 tu_group
->num_symtabs
= lh
->num_file_names
;
9302 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9304 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9306 const char *dir
= NULL
;
9307 struct file_entry
*fe
= &lh
->file_names
[i
];
9310 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9311 dwarf2_start_subfile (fe
->name
, dir
);
9313 if (current_subfile
->symtab
== NULL
)
9315 /* NOTE: start_subfile will recognize when it's been passed
9316 a file it has already seen. So we can't assume there's a
9317 simple mapping from lh->file_names to subfiles, plus
9318 lh->file_names may contain dups. */
9319 current_subfile
->symtab
9320 = allocate_symtab (cust
, current_subfile
->name
);
9323 fe
->symtab
= current_subfile
->symtab
;
9324 tu_group
->symtabs
[i
] = fe
->symtab
;
9329 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9331 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9333 struct file_entry
*fe
= &lh
->file_names
[i
];
9335 fe
->symtab
= tu_group
->symtabs
[i
];
9339 /* The main symtab is allocated last. Type units don't have DW_AT_name
9340 so they don't have a "real" (so to speak) symtab anyway.
9341 There is later code that will assign the main symtab to all symbols
9342 that don't have one. We need to handle the case of a symbol with a
9343 missing symtab (DW_AT_decl_file) anyway. */
9346 /* Process DW_TAG_type_unit.
9347 For TUs we want to skip the first top level sibling if it's not the
9348 actual type being defined by this TU. In this case the first top
9349 level sibling is there to provide context only. */
9352 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9354 struct die_info
*child_die
;
9356 prepare_one_comp_unit (cu
, die
, language_minimal
);
9358 /* Initialize (or reinitialize) the machinery for building symtabs.
9359 We do this before processing child DIEs, so that the line header table
9360 is available for DW_AT_decl_file. */
9361 setup_type_unit_groups (die
, cu
);
9363 if (die
->child
!= NULL
)
9365 child_die
= die
->child
;
9366 while (child_die
&& child_die
->tag
)
9368 process_die (child_die
, cu
);
9369 child_die
= sibling_die (child_die
);
9376 http://gcc.gnu.org/wiki/DebugFission
9377 http://gcc.gnu.org/wiki/DebugFissionDWP
9379 To simplify handling of both DWO files ("object" files with the DWARF info)
9380 and DWP files (a file with the DWOs packaged up into one file), we treat
9381 DWP files as having a collection of virtual DWO files. */
9384 hash_dwo_file (const void *item
)
9386 const struct dwo_file
*dwo_file
= item
;
9389 hash
= htab_hash_string (dwo_file
->dwo_name
);
9390 if (dwo_file
->comp_dir
!= NULL
)
9391 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9396 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9398 const struct dwo_file
*lhs
= item_lhs
;
9399 const struct dwo_file
*rhs
= item_rhs
;
9401 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9403 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9404 return lhs
->comp_dir
== rhs
->comp_dir
;
9405 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9408 /* Allocate a hash table for DWO files. */
9411 allocate_dwo_file_hash_table (void)
9413 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9415 return htab_create_alloc_ex (41,
9419 &objfile
->objfile_obstack
,
9420 hashtab_obstack_allocate
,
9421 dummy_obstack_deallocate
);
9424 /* Lookup DWO file DWO_NAME. */
9427 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9429 struct dwo_file find_entry
;
9432 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9433 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9435 memset (&find_entry
, 0, sizeof (find_entry
));
9436 find_entry
.dwo_name
= dwo_name
;
9437 find_entry
.comp_dir
= comp_dir
;
9438 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9444 hash_dwo_unit (const void *item
)
9446 const struct dwo_unit
*dwo_unit
= item
;
9448 /* This drops the top 32 bits of the id, but is ok for a hash. */
9449 return dwo_unit
->signature
;
9453 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9455 const struct dwo_unit
*lhs
= item_lhs
;
9456 const struct dwo_unit
*rhs
= item_rhs
;
9458 /* The signature is assumed to be unique within the DWO file.
9459 So while object file CU dwo_id's always have the value zero,
9460 that's OK, assuming each object file DWO file has only one CU,
9461 and that's the rule for now. */
9462 return lhs
->signature
== rhs
->signature
;
9465 /* Allocate a hash table for DWO CUs,TUs.
9466 There is one of these tables for each of CUs,TUs for each DWO file. */
9469 allocate_dwo_unit_table (struct objfile
*objfile
)
9471 /* Start out with a pretty small number.
9472 Generally DWO files contain only one CU and maybe some TUs. */
9473 return htab_create_alloc_ex (3,
9477 &objfile
->objfile_obstack
,
9478 hashtab_obstack_allocate
,
9479 dummy_obstack_deallocate
);
9482 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9484 struct create_dwo_cu_data
9486 struct dwo_file
*dwo_file
;
9487 struct dwo_unit dwo_unit
;
9490 /* die_reader_func for create_dwo_cu. */
9493 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9494 const gdb_byte
*info_ptr
,
9495 struct die_info
*comp_unit_die
,
9499 struct dwarf2_cu
*cu
= reader
->cu
;
9500 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9501 sect_offset offset
= cu
->per_cu
->offset
;
9502 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9503 struct create_dwo_cu_data
*data
= datap
;
9504 struct dwo_file
*dwo_file
= data
->dwo_file
;
9505 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9506 struct attribute
*attr
;
9508 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9511 complaint (&symfile_complaints
,
9512 _("Dwarf Error: debug entry at offset 0x%x is missing"
9513 " its dwo_id [in module %s]"),
9514 offset
.sect_off
, dwo_file
->dwo_name
);
9518 dwo_unit
->dwo_file
= dwo_file
;
9519 dwo_unit
->signature
= DW_UNSND (attr
);
9520 dwo_unit
->section
= section
;
9521 dwo_unit
->offset
= offset
;
9522 dwo_unit
->length
= cu
->per_cu
->length
;
9524 if (dwarf2_read_debug
)
9525 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9526 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9529 /* Create the dwo_unit for the lone CU in DWO_FILE.
9530 Note: This function processes DWO files only, not DWP files. */
9532 static struct dwo_unit
*
9533 create_dwo_cu (struct dwo_file
*dwo_file
)
9535 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9536 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9539 const gdb_byte
*info_ptr
, *end_ptr
;
9540 struct create_dwo_cu_data create_dwo_cu_data
;
9541 struct dwo_unit
*dwo_unit
;
9543 dwarf2_read_section (objfile
, section
);
9544 info_ptr
= section
->buffer
;
9546 if (info_ptr
== NULL
)
9549 /* We can't set abfd until now because the section may be empty or
9550 not present, in which case section->asection will be NULL. */
9551 abfd
= get_section_bfd_owner (section
);
9553 if (dwarf2_read_debug
)
9555 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9556 get_section_name (section
),
9557 get_section_file_name (section
));
9560 create_dwo_cu_data
.dwo_file
= dwo_file
;
9563 end_ptr
= info_ptr
+ section
->size
;
9564 while (info_ptr
< end_ptr
)
9566 struct dwarf2_per_cu_data per_cu
;
9568 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9569 sizeof (create_dwo_cu_data
.dwo_unit
));
9570 memset (&per_cu
, 0, sizeof (per_cu
));
9571 per_cu
.objfile
= objfile
;
9572 per_cu
.is_debug_types
= 0;
9573 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9574 per_cu
.section
= section
;
9576 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9577 create_dwo_cu_reader
,
9578 &create_dwo_cu_data
);
9580 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9582 /* If we've already found one, complain. We only support one
9583 because having more than one requires hacking the dwo_name of
9584 each to match, which is highly unlikely to happen. */
9585 if (dwo_unit
!= NULL
)
9587 complaint (&symfile_complaints
,
9588 _("Multiple CUs in DWO file %s [in module %s]"),
9589 dwo_file
->dwo_name
, objfile_name (objfile
));
9593 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9594 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9597 info_ptr
+= per_cu
.length
;
9603 /* DWP file .debug_{cu,tu}_index section format:
9604 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9608 Both index sections have the same format, and serve to map a 64-bit
9609 signature to a set of section numbers. Each section begins with a header,
9610 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9611 indexes, and a pool of 32-bit section numbers. The index sections will be
9612 aligned at 8-byte boundaries in the file.
9614 The index section header consists of:
9616 V, 32 bit version number
9618 N, 32 bit number of compilation units or type units in the index
9619 M, 32 bit number of slots in the hash table
9621 Numbers are recorded using the byte order of the application binary.
9623 The hash table begins at offset 16 in the section, and consists of an array
9624 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9625 order of the application binary). Unused slots in the hash table are 0.
9626 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9628 The parallel table begins immediately after the hash table
9629 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9630 array of 32-bit indexes (using the byte order of the application binary),
9631 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9632 table contains a 32-bit index into the pool of section numbers. For unused
9633 hash table slots, the corresponding entry in the parallel table will be 0.
9635 The pool of section numbers begins immediately following the hash table
9636 (at offset 16 + 12 * M from the beginning of the section). The pool of
9637 section numbers consists of an array of 32-bit words (using the byte order
9638 of the application binary). Each item in the array is indexed starting
9639 from 0. The hash table entry provides the index of the first section
9640 number in the set. Additional section numbers in the set follow, and the
9641 set is terminated by a 0 entry (section number 0 is not used in ELF).
9643 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9644 section must be the first entry in the set, and the .debug_abbrev.dwo must
9645 be the second entry. Other members of the set may follow in any order.
9651 DWP Version 2 combines all the .debug_info, etc. sections into one,
9652 and the entries in the index tables are now offsets into these sections.
9653 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9656 Index Section Contents:
9658 Hash Table of Signatures dwp_hash_table.hash_table
9659 Parallel Table of Indices dwp_hash_table.unit_table
9660 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9661 Table of Section Sizes dwp_hash_table.v2.sizes
9663 The index section header consists of:
9665 V, 32 bit version number
9666 L, 32 bit number of columns in the table of section offsets
9667 N, 32 bit number of compilation units or type units in the index
9668 M, 32 bit number of slots in the hash table
9670 Numbers are recorded using the byte order of the application binary.
9672 The hash table has the same format as version 1.
9673 The parallel table of indices has the same format as version 1,
9674 except that the entries are origin-1 indices into the table of sections
9675 offsets and the table of section sizes.
9677 The table of offsets begins immediately following the parallel table
9678 (at offset 16 + 12 * M from the beginning of the section). The table is
9679 a two-dimensional array of 32-bit words (using the byte order of the
9680 application binary), with L columns and N+1 rows, in row-major order.
9681 Each row in the array is indexed starting from 0. The first row provides
9682 a key to the remaining rows: each column in this row provides an identifier
9683 for a debug section, and the offsets in the same column of subsequent rows
9684 refer to that section. The section identifiers are:
9686 DW_SECT_INFO 1 .debug_info.dwo
9687 DW_SECT_TYPES 2 .debug_types.dwo
9688 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9689 DW_SECT_LINE 4 .debug_line.dwo
9690 DW_SECT_LOC 5 .debug_loc.dwo
9691 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9692 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9693 DW_SECT_MACRO 8 .debug_macro.dwo
9695 The offsets provided by the CU and TU index sections are the base offsets
9696 for the contributions made by each CU or TU to the corresponding section
9697 in the package file. Each CU and TU header contains an abbrev_offset
9698 field, used to find the abbreviations table for that CU or TU within the
9699 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9700 be interpreted as relative to the base offset given in the index section.
9701 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9702 should be interpreted as relative to the base offset for .debug_line.dwo,
9703 and offsets into other debug sections obtained from DWARF attributes should
9704 also be interpreted as relative to the corresponding base offset.
9706 The table of sizes begins immediately following the table of offsets.
9707 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9708 with L columns and N rows, in row-major order. Each row in the array is
9709 indexed starting from 1 (row 0 is shared by the two tables).
9713 Hash table lookup is handled the same in version 1 and 2:
9715 We assume that N and M will not exceed 2^32 - 1.
9716 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9718 Given a 64-bit compilation unit signature or a type signature S, an entry
9719 in the hash table is located as follows:
9721 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9722 the low-order k bits all set to 1.
9724 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9726 3) If the hash table entry at index H matches the signature, use that
9727 entry. If the hash table entry at index H is unused (all zeroes),
9728 terminate the search: the signature is not present in the table.
9730 4) Let H = (H + H') modulo M. Repeat at Step 3.
9732 Because M > N and H' and M are relatively prime, the search is guaranteed
9733 to stop at an unused slot or find the match. */
9735 /* Create a hash table to map DWO IDs to their CU/TU entry in
9736 .debug_{info,types}.dwo in DWP_FILE.
9737 Returns NULL if there isn't one.
9738 Note: This function processes DWP files only, not DWO files. */
9740 static struct dwp_hash_table
*
9741 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9743 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9744 bfd
*dbfd
= dwp_file
->dbfd
;
9745 const gdb_byte
*index_ptr
, *index_end
;
9746 struct dwarf2_section_info
*index
;
9747 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9748 struct dwp_hash_table
*htab
;
9751 index
= &dwp_file
->sections
.tu_index
;
9753 index
= &dwp_file
->sections
.cu_index
;
9755 if (dwarf2_section_empty_p (index
))
9757 dwarf2_read_section (objfile
, index
);
9759 index_ptr
= index
->buffer
;
9760 index_end
= index_ptr
+ index
->size
;
9762 version
= read_4_bytes (dbfd
, index_ptr
);
9765 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9769 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9771 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9774 if (version
!= 1 && version
!= 2)
9776 error (_("Dwarf Error: unsupported DWP file version (%s)"
9778 pulongest (version
), dwp_file
->name
);
9780 if (nr_slots
!= (nr_slots
& -nr_slots
))
9782 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9783 " is not power of 2 [in module %s]"),
9784 pulongest (nr_slots
), dwp_file
->name
);
9787 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9788 htab
->version
= version
;
9789 htab
->nr_columns
= nr_columns
;
9790 htab
->nr_units
= nr_units
;
9791 htab
->nr_slots
= nr_slots
;
9792 htab
->hash_table
= index_ptr
;
9793 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9795 /* Exit early if the table is empty. */
9796 if (nr_slots
== 0 || nr_units
== 0
9797 || (version
== 2 && nr_columns
== 0))
9799 /* All must be zero. */
9800 if (nr_slots
!= 0 || nr_units
!= 0
9801 || (version
== 2 && nr_columns
!= 0))
9803 complaint (&symfile_complaints
,
9804 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9805 " all zero [in modules %s]"),
9813 htab
->section_pool
.v1
.indices
=
9814 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9815 /* It's harder to decide whether the section is too small in v1.
9816 V1 is deprecated anyway so we punt. */
9820 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9821 int *ids
= htab
->section_pool
.v2
.section_ids
;
9822 /* Reverse map for error checking. */
9823 int ids_seen
[DW_SECT_MAX
+ 1];
9828 error (_("Dwarf Error: bad DWP hash table, too few columns"
9829 " in section table [in module %s]"),
9832 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9834 error (_("Dwarf Error: bad DWP hash table, too many columns"
9835 " in section table [in module %s]"),
9838 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9839 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9840 for (i
= 0; i
< nr_columns
; ++i
)
9842 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9844 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9846 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9847 " in section table [in module %s]"),
9848 id
, dwp_file
->name
);
9850 if (ids_seen
[id
] != -1)
9852 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9853 " id %d in section table [in module %s]"),
9854 id
, dwp_file
->name
);
9859 /* Must have exactly one info or types section. */
9860 if (((ids_seen
[DW_SECT_INFO
] != -1)
9861 + (ids_seen
[DW_SECT_TYPES
] != -1))
9864 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9865 " DWO info/types section [in module %s]"),
9868 /* Must have an abbrev section. */
9869 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9871 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9872 " section [in module %s]"),
9875 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9876 htab
->section_pool
.v2
.sizes
=
9877 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9878 * nr_units
* nr_columns
);
9879 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9880 * nr_units
* nr_columns
))
9883 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9892 /* Update SECTIONS with the data from SECTP.
9894 This function is like the other "locate" section routines that are
9895 passed to bfd_map_over_sections, but in this context the sections to
9896 read comes from the DWP V1 hash table, not the full ELF section table.
9898 The result is non-zero for success, or zero if an error was found. */
9901 locate_v1_virtual_dwo_sections (asection
*sectp
,
9902 struct virtual_v1_dwo_sections
*sections
)
9904 const struct dwop_section_names
*names
= &dwop_section_names
;
9906 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9908 /* There can be only one. */
9909 if (sections
->abbrev
.s
.asection
!= NULL
)
9911 sections
->abbrev
.s
.asection
= sectp
;
9912 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9914 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9915 || section_is_p (sectp
->name
, &names
->types_dwo
))
9917 /* There can be only one. */
9918 if (sections
->info_or_types
.s
.asection
!= NULL
)
9920 sections
->info_or_types
.s
.asection
= sectp
;
9921 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9923 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9925 /* There can be only one. */
9926 if (sections
->line
.s
.asection
!= NULL
)
9928 sections
->line
.s
.asection
= sectp
;
9929 sections
->line
.size
= bfd_get_section_size (sectp
);
9931 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9933 /* There can be only one. */
9934 if (sections
->loc
.s
.asection
!= NULL
)
9936 sections
->loc
.s
.asection
= sectp
;
9937 sections
->loc
.size
= bfd_get_section_size (sectp
);
9939 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9941 /* There can be only one. */
9942 if (sections
->macinfo
.s
.asection
!= NULL
)
9944 sections
->macinfo
.s
.asection
= sectp
;
9945 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9947 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9949 /* There can be only one. */
9950 if (sections
->macro
.s
.asection
!= NULL
)
9952 sections
->macro
.s
.asection
= sectp
;
9953 sections
->macro
.size
= bfd_get_section_size (sectp
);
9955 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9957 /* There can be only one. */
9958 if (sections
->str_offsets
.s
.asection
!= NULL
)
9960 sections
->str_offsets
.s
.asection
= sectp
;
9961 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9965 /* No other kind of section is valid. */
9972 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9973 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9974 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9975 This is for DWP version 1 files. */
9977 static struct dwo_unit
*
9978 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9979 uint32_t unit_index
,
9980 const char *comp_dir
,
9981 ULONGEST signature
, int is_debug_types
)
9983 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9984 const struct dwp_hash_table
*dwp_htab
=
9985 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9986 bfd
*dbfd
= dwp_file
->dbfd
;
9987 const char *kind
= is_debug_types
? "TU" : "CU";
9988 struct dwo_file
*dwo_file
;
9989 struct dwo_unit
*dwo_unit
;
9990 struct virtual_v1_dwo_sections sections
;
9991 void **dwo_file_slot
;
9992 char *virtual_dwo_name
;
9993 struct dwarf2_section_info
*cutu
;
9994 struct cleanup
*cleanups
;
9997 gdb_assert (dwp_file
->version
== 1);
9999 if (dwarf2_read_debug
)
10001 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10003 pulongest (unit_index
), hex_string (signature
),
10007 /* Fetch the sections of this DWO unit.
10008 Put a limit on the number of sections we look for so that bad data
10009 doesn't cause us to loop forever. */
10011 #define MAX_NR_V1_DWO_SECTIONS \
10012 (1 /* .debug_info or .debug_types */ \
10013 + 1 /* .debug_abbrev */ \
10014 + 1 /* .debug_line */ \
10015 + 1 /* .debug_loc */ \
10016 + 1 /* .debug_str_offsets */ \
10017 + 1 /* .debug_macro or .debug_macinfo */ \
10018 + 1 /* trailing zero */)
10020 memset (§ions
, 0, sizeof (sections
));
10021 cleanups
= make_cleanup (null_cleanup
, 0);
10023 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10026 uint32_t section_nr
=
10027 read_4_bytes (dbfd
,
10028 dwp_htab
->section_pool
.v1
.indices
10029 + (unit_index
+ i
) * sizeof (uint32_t));
10031 if (section_nr
== 0)
10033 if (section_nr
>= dwp_file
->num_sections
)
10035 error (_("Dwarf Error: bad DWP hash table, section number too large"
10036 " [in module %s]"),
10040 sectp
= dwp_file
->elf_sections
[section_nr
];
10041 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10043 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10044 " [in module %s]"),
10050 || dwarf2_section_empty_p (§ions
.info_or_types
)
10051 || dwarf2_section_empty_p (§ions
.abbrev
))
10053 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10054 " [in module %s]"),
10057 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10059 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10060 " [in module %s]"),
10064 /* It's easier for the rest of the code if we fake a struct dwo_file and
10065 have dwo_unit "live" in that. At least for now.
10067 The DWP file can be made up of a random collection of CUs and TUs.
10068 However, for each CU + set of TUs that came from the same original DWO
10069 file, we can combine them back into a virtual DWO file to save space
10070 (fewer struct dwo_file objects to allocate). Remember that for really
10071 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10074 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10075 get_section_id (§ions
.abbrev
),
10076 get_section_id (§ions
.line
),
10077 get_section_id (§ions
.loc
),
10078 get_section_id (§ions
.str_offsets
));
10079 make_cleanup (xfree
, virtual_dwo_name
);
10080 /* Can we use an existing virtual DWO file? */
10081 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10082 /* Create one if necessary. */
10083 if (*dwo_file_slot
== NULL
)
10085 if (dwarf2_read_debug
)
10087 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10090 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10091 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10093 strlen (virtual_dwo_name
));
10094 dwo_file
->comp_dir
= comp_dir
;
10095 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10096 dwo_file
->sections
.line
= sections
.line
;
10097 dwo_file
->sections
.loc
= sections
.loc
;
10098 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10099 dwo_file
->sections
.macro
= sections
.macro
;
10100 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10101 /* The "str" section is global to the entire DWP file. */
10102 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10103 /* The info or types section is assigned below to dwo_unit,
10104 there's no need to record it in dwo_file.
10105 Also, we can't simply record type sections in dwo_file because
10106 we record a pointer into the vector in dwo_unit. As we collect more
10107 types we'll grow the vector and eventually have to reallocate space
10108 for it, invalidating all copies of pointers into the previous
10110 *dwo_file_slot
= dwo_file
;
10114 if (dwarf2_read_debug
)
10116 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10119 dwo_file
= *dwo_file_slot
;
10121 do_cleanups (cleanups
);
10123 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10124 dwo_unit
->dwo_file
= dwo_file
;
10125 dwo_unit
->signature
= signature
;
10126 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10127 sizeof (struct dwarf2_section_info
));
10128 *dwo_unit
->section
= sections
.info_or_types
;
10129 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10134 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10135 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10136 piece within that section used by a TU/CU, return a virtual section
10137 of just that piece. */
10139 static struct dwarf2_section_info
10140 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10141 bfd_size_type offset
, bfd_size_type size
)
10143 struct dwarf2_section_info result
;
10146 gdb_assert (section
!= NULL
);
10147 gdb_assert (!section
->is_virtual
);
10149 memset (&result
, 0, sizeof (result
));
10150 result
.s
.containing_section
= section
;
10151 result
.is_virtual
= 1;
10156 sectp
= get_section_bfd_section (section
);
10158 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10159 bounds of the real section. This is a pretty-rare event, so just
10160 flag an error (easier) instead of a warning and trying to cope. */
10162 || offset
+ size
> bfd_get_section_size (sectp
))
10164 bfd
*abfd
= sectp
->owner
;
10166 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10167 " in section %s [in module %s]"),
10168 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10169 objfile_name (dwarf2_per_objfile
->objfile
));
10172 result
.virtual_offset
= offset
;
10173 result
.size
= size
;
10177 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10178 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10179 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10180 This is for DWP version 2 files. */
10182 static struct dwo_unit
*
10183 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10184 uint32_t unit_index
,
10185 const char *comp_dir
,
10186 ULONGEST signature
, int is_debug_types
)
10188 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10189 const struct dwp_hash_table
*dwp_htab
=
10190 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10191 bfd
*dbfd
= dwp_file
->dbfd
;
10192 const char *kind
= is_debug_types
? "TU" : "CU";
10193 struct dwo_file
*dwo_file
;
10194 struct dwo_unit
*dwo_unit
;
10195 struct virtual_v2_dwo_sections sections
;
10196 void **dwo_file_slot
;
10197 char *virtual_dwo_name
;
10198 struct dwarf2_section_info
*cutu
;
10199 struct cleanup
*cleanups
;
10202 gdb_assert (dwp_file
->version
== 2);
10204 if (dwarf2_read_debug
)
10206 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10208 pulongest (unit_index
), hex_string (signature
),
10212 /* Fetch the section offsets of this DWO unit. */
10214 memset (§ions
, 0, sizeof (sections
));
10215 cleanups
= make_cleanup (null_cleanup
, 0);
10217 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10219 uint32_t offset
= read_4_bytes (dbfd
,
10220 dwp_htab
->section_pool
.v2
.offsets
10221 + (((unit_index
- 1) * dwp_htab
->nr_columns
10223 * sizeof (uint32_t)));
10224 uint32_t size
= read_4_bytes (dbfd
,
10225 dwp_htab
->section_pool
.v2
.sizes
10226 + (((unit_index
- 1) * dwp_htab
->nr_columns
10228 * sizeof (uint32_t)));
10230 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10233 case DW_SECT_TYPES
:
10234 sections
.info_or_types_offset
= offset
;
10235 sections
.info_or_types_size
= size
;
10237 case DW_SECT_ABBREV
:
10238 sections
.abbrev_offset
= offset
;
10239 sections
.abbrev_size
= size
;
10242 sections
.line_offset
= offset
;
10243 sections
.line_size
= size
;
10246 sections
.loc_offset
= offset
;
10247 sections
.loc_size
= size
;
10249 case DW_SECT_STR_OFFSETS
:
10250 sections
.str_offsets_offset
= offset
;
10251 sections
.str_offsets_size
= size
;
10253 case DW_SECT_MACINFO
:
10254 sections
.macinfo_offset
= offset
;
10255 sections
.macinfo_size
= size
;
10257 case DW_SECT_MACRO
:
10258 sections
.macro_offset
= offset
;
10259 sections
.macro_size
= size
;
10264 /* It's easier for the rest of the code if we fake a struct dwo_file and
10265 have dwo_unit "live" in that. At least for now.
10267 The DWP file can be made up of a random collection of CUs and TUs.
10268 However, for each CU + set of TUs that came from the same original DWO
10269 file, we can combine them back into a virtual DWO file to save space
10270 (fewer struct dwo_file objects to allocate). Remember that for really
10271 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10274 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10275 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10276 (long) (sections
.line_size
? sections
.line_offset
: 0),
10277 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10278 (long) (sections
.str_offsets_size
10279 ? sections
.str_offsets_offset
: 0));
10280 make_cleanup (xfree
, virtual_dwo_name
);
10281 /* Can we use an existing virtual DWO file? */
10282 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10283 /* Create one if necessary. */
10284 if (*dwo_file_slot
== NULL
)
10286 if (dwarf2_read_debug
)
10288 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10291 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10292 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10294 strlen (virtual_dwo_name
));
10295 dwo_file
->comp_dir
= comp_dir
;
10296 dwo_file
->sections
.abbrev
=
10297 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10298 sections
.abbrev_offset
, sections
.abbrev_size
);
10299 dwo_file
->sections
.line
=
10300 create_dwp_v2_section (&dwp_file
->sections
.line
,
10301 sections
.line_offset
, sections
.line_size
);
10302 dwo_file
->sections
.loc
=
10303 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10304 sections
.loc_offset
, sections
.loc_size
);
10305 dwo_file
->sections
.macinfo
=
10306 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10307 sections
.macinfo_offset
, sections
.macinfo_size
);
10308 dwo_file
->sections
.macro
=
10309 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10310 sections
.macro_offset
, sections
.macro_size
);
10311 dwo_file
->sections
.str_offsets
=
10312 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10313 sections
.str_offsets_offset
,
10314 sections
.str_offsets_size
);
10315 /* The "str" section is global to the entire DWP file. */
10316 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10317 /* The info or types section is assigned below to dwo_unit,
10318 there's no need to record it in dwo_file.
10319 Also, we can't simply record type sections in dwo_file because
10320 we record a pointer into the vector in dwo_unit. As we collect more
10321 types we'll grow the vector and eventually have to reallocate space
10322 for it, invalidating all copies of pointers into the previous
10324 *dwo_file_slot
= dwo_file
;
10328 if (dwarf2_read_debug
)
10330 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10333 dwo_file
= *dwo_file_slot
;
10335 do_cleanups (cleanups
);
10337 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10338 dwo_unit
->dwo_file
= dwo_file
;
10339 dwo_unit
->signature
= signature
;
10340 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10341 sizeof (struct dwarf2_section_info
));
10342 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10343 ? &dwp_file
->sections
.types
10344 : &dwp_file
->sections
.info
,
10345 sections
.info_or_types_offset
,
10346 sections
.info_or_types_size
);
10347 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10352 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10353 Returns NULL if the signature isn't found. */
10355 static struct dwo_unit
*
10356 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10357 ULONGEST signature
, int is_debug_types
)
10359 const struct dwp_hash_table
*dwp_htab
=
10360 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10361 bfd
*dbfd
= dwp_file
->dbfd
;
10362 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10363 uint32_t hash
= signature
& mask
;
10364 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10367 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10369 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10370 find_dwo_cu
.signature
= signature
;
10371 slot
= htab_find_slot (is_debug_types
10372 ? dwp_file
->loaded_tus
10373 : dwp_file
->loaded_cus
,
10374 &find_dwo_cu
, INSERT
);
10379 /* Use a for loop so that we don't loop forever on bad debug info. */
10380 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10382 ULONGEST signature_in_table
;
10384 signature_in_table
=
10385 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10386 if (signature_in_table
== signature
)
10388 uint32_t unit_index
=
10389 read_4_bytes (dbfd
,
10390 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10392 if (dwp_file
->version
== 1)
10394 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10395 comp_dir
, signature
,
10400 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10401 comp_dir
, signature
,
10406 if (signature_in_table
== 0)
10408 hash
= (hash
+ hash2
) & mask
;
10411 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10412 " [in module %s]"),
10416 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10417 Open the file specified by FILE_NAME and hand it off to BFD for
10418 preliminary analysis. Return a newly initialized bfd *, which
10419 includes a canonicalized copy of FILE_NAME.
10420 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10421 SEARCH_CWD is true if the current directory is to be searched.
10422 It will be searched before debug-file-directory.
10423 If successful, the file is added to the bfd include table of the
10424 objfile's bfd (see gdb_bfd_record_inclusion).
10425 If unable to find/open the file, return NULL.
10426 NOTE: This function is derived from symfile_bfd_open. */
10429 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10433 char *absolute_name
;
10434 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10435 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10436 to debug_file_directory. */
10438 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10442 if (*debug_file_directory
!= '\0')
10443 search_path
= concat (".", dirname_separator_string
,
10444 debug_file_directory
, NULL
);
10446 search_path
= xstrdup (".");
10449 search_path
= xstrdup (debug_file_directory
);
10451 flags
= OPF_RETURN_REALPATH
;
10453 flags
|= OPF_SEARCH_IN_PATH
;
10454 desc
= openp (search_path
, flags
, file_name
,
10455 O_RDONLY
| O_BINARY
, &absolute_name
);
10456 xfree (search_path
);
10460 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10461 xfree (absolute_name
);
10462 if (sym_bfd
== NULL
)
10464 bfd_set_cacheable (sym_bfd
, 1);
10466 if (!bfd_check_format (sym_bfd
, bfd_object
))
10468 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10472 /* Success. Record the bfd as having been included by the objfile's bfd.
10473 This is important because things like demangled_names_hash lives in the
10474 objfile's per_bfd space and may have references to things like symbol
10475 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10476 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10481 /* Try to open DWO file FILE_NAME.
10482 COMP_DIR is the DW_AT_comp_dir attribute.
10483 The result is the bfd handle of the file.
10484 If there is a problem finding or opening the file, return NULL.
10485 Upon success, the canonicalized path of the file is stored in the bfd,
10486 same as symfile_bfd_open. */
10489 open_dwo_file (const char *file_name
, const char *comp_dir
)
10493 if (IS_ABSOLUTE_PATH (file_name
))
10494 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10496 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10498 if (comp_dir
!= NULL
)
10500 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10502 /* NOTE: If comp_dir is a relative path, this will also try the
10503 search path, which seems useful. */
10504 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10505 xfree (path_to_try
);
10510 /* That didn't work, try debug-file-directory, which, despite its name,
10511 is a list of paths. */
10513 if (*debug_file_directory
== '\0')
10516 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10519 /* This function is mapped across the sections and remembers the offset and
10520 size of each of the DWO debugging sections we are interested in. */
10523 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10525 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10526 const struct dwop_section_names
*names
= &dwop_section_names
;
10528 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10530 dwo_sections
->abbrev
.s
.asection
= sectp
;
10531 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10533 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10535 dwo_sections
->info
.s
.asection
= sectp
;
10536 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10538 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10540 dwo_sections
->line
.s
.asection
= sectp
;
10541 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10543 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10545 dwo_sections
->loc
.s
.asection
= sectp
;
10546 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10548 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10550 dwo_sections
->macinfo
.s
.asection
= sectp
;
10551 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10553 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10555 dwo_sections
->macro
.s
.asection
= sectp
;
10556 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10558 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10560 dwo_sections
->str
.s
.asection
= sectp
;
10561 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10563 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10565 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10566 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10568 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10570 struct dwarf2_section_info type_section
;
10572 memset (&type_section
, 0, sizeof (type_section
));
10573 type_section
.s
.asection
= sectp
;
10574 type_section
.size
= bfd_get_section_size (sectp
);
10575 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10580 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10581 by PER_CU. This is for the non-DWP case.
10582 The result is NULL if DWO_NAME can't be found. */
10584 static struct dwo_file
*
10585 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10586 const char *dwo_name
, const char *comp_dir
)
10588 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10589 struct dwo_file
*dwo_file
;
10591 struct cleanup
*cleanups
;
10593 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10596 if (dwarf2_read_debug
)
10597 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10600 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10601 dwo_file
->dwo_name
= dwo_name
;
10602 dwo_file
->comp_dir
= comp_dir
;
10603 dwo_file
->dbfd
= dbfd
;
10605 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10607 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10609 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10611 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10612 dwo_file
->sections
.types
);
10614 discard_cleanups (cleanups
);
10616 if (dwarf2_read_debug
)
10617 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10622 /* This function is mapped across the sections and remembers the offset and
10623 size of each of the DWP debugging sections common to version 1 and 2 that
10624 we are interested in. */
10627 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10628 void *dwp_file_ptr
)
10630 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10631 const struct dwop_section_names
*names
= &dwop_section_names
;
10632 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10634 /* Record the ELF section number for later lookup: this is what the
10635 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10636 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10637 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10639 /* Look for specific sections that we need. */
10640 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10642 dwp_file
->sections
.str
.s
.asection
= sectp
;
10643 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10645 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10647 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10648 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10650 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10652 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10653 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10657 /* This function is mapped across the sections and remembers the offset and
10658 size of each of the DWP version 2 debugging sections that we are interested
10659 in. This is split into a separate function because we don't know if we
10660 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10663 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10665 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10666 const struct dwop_section_names
*names
= &dwop_section_names
;
10667 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10669 /* Record the ELF section number for later lookup: this is what the
10670 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10671 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10672 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10674 /* Look for specific sections that we need. */
10675 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10677 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10678 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10680 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10682 dwp_file
->sections
.info
.s
.asection
= sectp
;
10683 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10685 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10687 dwp_file
->sections
.line
.s
.asection
= sectp
;
10688 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10690 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10692 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10693 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10695 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10697 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10698 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10700 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10702 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10703 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10705 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10707 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10708 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10710 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10712 dwp_file
->sections
.types
.s
.asection
= sectp
;
10713 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10717 /* Hash function for dwp_file loaded CUs/TUs. */
10720 hash_dwp_loaded_cutus (const void *item
)
10722 const struct dwo_unit
*dwo_unit
= item
;
10724 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10725 return dwo_unit
->signature
;
10728 /* Equality function for dwp_file loaded CUs/TUs. */
10731 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10733 const struct dwo_unit
*dua
= a
;
10734 const struct dwo_unit
*dub
= b
;
10736 return dua
->signature
== dub
->signature
;
10739 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10742 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10744 return htab_create_alloc_ex (3,
10745 hash_dwp_loaded_cutus
,
10746 eq_dwp_loaded_cutus
,
10748 &objfile
->objfile_obstack
,
10749 hashtab_obstack_allocate
,
10750 dummy_obstack_deallocate
);
10753 /* Try to open DWP file FILE_NAME.
10754 The result is the bfd handle of the file.
10755 If there is a problem finding or opening the file, return NULL.
10756 Upon success, the canonicalized path of the file is stored in the bfd,
10757 same as symfile_bfd_open. */
10760 open_dwp_file (const char *file_name
)
10764 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10768 /* Work around upstream bug 15652.
10769 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10770 [Whether that's a "bug" is debatable, but it is getting in our way.]
10771 We have no real idea where the dwp file is, because gdb's realpath-ing
10772 of the executable's path may have discarded the needed info.
10773 [IWBN if the dwp file name was recorded in the executable, akin to
10774 .gnu_debuglink, but that doesn't exist yet.]
10775 Strip the directory from FILE_NAME and search again. */
10776 if (*debug_file_directory
!= '\0')
10778 /* Don't implicitly search the current directory here.
10779 If the user wants to search "." to handle this case,
10780 it must be added to debug-file-directory. */
10781 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10788 /* Initialize the use of the DWP file for the current objfile.
10789 By convention the name of the DWP file is ${objfile}.dwp.
10790 The result is NULL if it can't be found. */
10792 static struct dwp_file
*
10793 open_and_init_dwp_file (void)
10795 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10796 struct dwp_file
*dwp_file
;
10799 struct cleanup
*cleanups
;
10801 /* Try to find first .dwp for the binary file before any symbolic links
10803 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10804 cleanups
= make_cleanup (xfree
, dwp_name
);
10806 dbfd
= open_dwp_file (dwp_name
);
10808 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10810 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10811 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10812 make_cleanup (xfree
, dwp_name
);
10813 dbfd
= open_dwp_file (dwp_name
);
10818 if (dwarf2_read_debug
)
10819 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10820 do_cleanups (cleanups
);
10823 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10824 dwp_file
->name
= bfd_get_filename (dbfd
);
10825 dwp_file
->dbfd
= dbfd
;
10826 do_cleanups (cleanups
);
10828 /* +1: section 0 is unused */
10829 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10830 dwp_file
->elf_sections
=
10831 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10832 dwp_file
->num_sections
, asection
*);
10834 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10836 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10838 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10840 /* The DWP file version is stored in the hash table. Oh well. */
10841 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10843 /* Technically speaking, we should try to limp along, but this is
10844 pretty bizarre. We use pulongest here because that's the established
10845 portability solution (e.g, we cannot use %u for uint32_t). */
10846 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10847 " TU version %s [in DWP file %s]"),
10848 pulongest (dwp_file
->cus
->version
),
10849 pulongest (dwp_file
->tus
->version
), dwp_name
);
10851 dwp_file
->version
= dwp_file
->cus
->version
;
10853 if (dwp_file
->version
== 2)
10854 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10856 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10857 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10859 if (dwarf2_read_debug
)
10861 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10862 fprintf_unfiltered (gdb_stdlog
,
10863 " %s CUs, %s TUs\n",
10864 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10865 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10871 /* Wrapper around open_and_init_dwp_file, only open it once. */
10873 static struct dwp_file
*
10874 get_dwp_file (void)
10876 if (! dwarf2_per_objfile
->dwp_checked
)
10878 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10879 dwarf2_per_objfile
->dwp_checked
= 1;
10881 return dwarf2_per_objfile
->dwp_file
;
10884 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10885 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10886 or in the DWP file for the objfile, referenced by THIS_UNIT.
10887 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10888 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10890 This is called, for example, when wanting to read a variable with a
10891 complex location. Therefore we don't want to do file i/o for every call.
10892 Therefore we don't want to look for a DWO file on every call.
10893 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10894 then we check if we've already seen DWO_NAME, and only THEN do we check
10897 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10898 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10900 static struct dwo_unit
*
10901 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10902 const char *dwo_name
, const char *comp_dir
,
10903 ULONGEST signature
, int is_debug_types
)
10905 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10906 const char *kind
= is_debug_types
? "TU" : "CU";
10907 void **dwo_file_slot
;
10908 struct dwo_file
*dwo_file
;
10909 struct dwp_file
*dwp_file
;
10911 /* First see if there's a DWP file.
10912 If we have a DWP file but didn't find the DWO inside it, don't
10913 look for the original DWO file. It makes gdb behave differently
10914 depending on whether one is debugging in the build tree. */
10916 dwp_file
= get_dwp_file ();
10917 if (dwp_file
!= NULL
)
10919 const struct dwp_hash_table
*dwp_htab
=
10920 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10922 if (dwp_htab
!= NULL
)
10924 struct dwo_unit
*dwo_cutu
=
10925 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10926 signature
, is_debug_types
);
10928 if (dwo_cutu
!= NULL
)
10930 if (dwarf2_read_debug
)
10932 fprintf_unfiltered (gdb_stdlog
,
10933 "Virtual DWO %s %s found: @%s\n",
10934 kind
, hex_string (signature
),
10935 host_address_to_string (dwo_cutu
));
10943 /* No DWP file, look for the DWO file. */
10945 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10946 if (*dwo_file_slot
== NULL
)
10948 /* Read in the file and build a table of the CUs/TUs it contains. */
10949 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10951 /* NOTE: This will be NULL if unable to open the file. */
10952 dwo_file
= *dwo_file_slot
;
10954 if (dwo_file
!= NULL
)
10956 struct dwo_unit
*dwo_cutu
= NULL
;
10958 if (is_debug_types
&& dwo_file
->tus
)
10960 struct dwo_unit find_dwo_cutu
;
10962 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10963 find_dwo_cutu
.signature
= signature
;
10964 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10966 else if (!is_debug_types
&& dwo_file
->cu
)
10968 if (signature
== dwo_file
->cu
->signature
)
10969 dwo_cutu
= dwo_file
->cu
;
10972 if (dwo_cutu
!= NULL
)
10974 if (dwarf2_read_debug
)
10976 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10977 kind
, dwo_name
, hex_string (signature
),
10978 host_address_to_string (dwo_cutu
));
10985 /* We didn't find it. This could mean a dwo_id mismatch, or
10986 someone deleted the DWO/DWP file, or the search path isn't set up
10987 correctly to find the file. */
10989 if (dwarf2_read_debug
)
10991 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
10992 kind
, dwo_name
, hex_string (signature
));
10995 /* This is a warning and not a complaint because it can be caused by
10996 pilot error (e.g., user accidentally deleting the DWO). */
10998 /* Print the name of the DWP file if we looked there, helps the user
10999 better diagnose the problem. */
11000 char *dwp_text
= NULL
;
11001 struct cleanup
*cleanups
;
11003 if (dwp_file
!= NULL
)
11004 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11005 cleanups
= make_cleanup (xfree
, dwp_text
);
11007 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11008 " [in module %s]"),
11009 kind
, dwo_name
, hex_string (signature
),
11010 dwp_text
!= NULL
? dwp_text
: "",
11011 this_unit
->is_debug_types
? "TU" : "CU",
11012 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11014 do_cleanups (cleanups
);
11019 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11020 See lookup_dwo_cutu_unit for details. */
11022 static struct dwo_unit
*
11023 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11024 const char *dwo_name
, const char *comp_dir
,
11025 ULONGEST signature
)
11027 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11030 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11031 See lookup_dwo_cutu_unit for details. */
11033 static struct dwo_unit
*
11034 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11035 const char *dwo_name
, const char *comp_dir
)
11037 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11040 /* Traversal function for queue_and_load_all_dwo_tus. */
11043 queue_and_load_dwo_tu (void **slot
, void *info
)
11045 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11046 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11047 ULONGEST signature
= dwo_unit
->signature
;
11048 struct signatured_type
*sig_type
=
11049 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11051 if (sig_type
!= NULL
)
11053 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11055 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11056 a real dependency of PER_CU on SIG_TYPE. That is detected later
11057 while processing PER_CU. */
11058 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11059 load_full_type_unit (sig_cu
);
11060 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11066 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11067 The DWO may have the only definition of the type, though it may not be
11068 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11069 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11072 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11074 struct dwo_unit
*dwo_unit
;
11075 struct dwo_file
*dwo_file
;
11077 gdb_assert (!per_cu
->is_debug_types
);
11078 gdb_assert (get_dwp_file () == NULL
);
11079 gdb_assert (per_cu
->cu
!= NULL
);
11081 dwo_unit
= per_cu
->cu
->dwo_unit
;
11082 gdb_assert (dwo_unit
!= NULL
);
11084 dwo_file
= dwo_unit
->dwo_file
;
11085 if (dwo_file
->tus
!= NULL
)
11086 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11089 /* Free all resources associated with DWO_FILE.
11090 Close the DWO file and munmap the sections.
11091 All memory should be on the objfile obstack. */
11094 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11097 struct dwarf2_section_info
*section
;
11099 /* Note: dbfd is NULL for virtual DWO files. */
11100 gdb_bfd_unref (dwo_file
->dbfd
);
11102 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11105 /* Wrapper for free_dwo_file for use in cleanups. */
11108 free_dwo_file_cleanup (void *arg
)
11110 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11111 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11113 free_dwo_file (dwo_file
, objfile
);
11116 /* Traversal function for free_dwo_files. */
11119 free_dwo_file_from_slot (void **slot
, void *info
)
11121 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11122 struct objfile
*objfile
= (struct objfile
*) info
;
11124 free_dwo_file (dwo_file
, objfile
);
11129 /* Free all resources associated with DWO_FILES. */
11132 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11134 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11137 /* Read in various DIEs. */
11139 /* qsort helper for inherit_abstract_dies. */
11142 unsigned_int_compar (const void *ap
, const void *bp
)
11144 unsigned int a
= *(unsigned int *) ap
;
11145 unsigned int b
= *(unsigned int *) bp
;
11147 return (a
> b
) - (b
> a
);
11150 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11151 Inherit only the children of the DW_AT_abstract_origin DIE not being
11152 already referenced by DW_AT_abstract_origin from the children of the
11156 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11158 struct die_info
*child_die
;
11159 unsigned die_children_count
;
11160 /* CU offsets which were referenced by children of the current DIE. */
11161 sect_offset
*offsets
;
11162 sect_offset
*offsets_end
, *offsetp
;
11163 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11164 struct die_info
*origin_die
;
11165 /* Iterator of the ORIGIN_DIE children. */
11166 struct die_info
*origin_child_die
;
11167 struct cleanup
*cleanups
;
11168 struct attribute
*attr
;
11169 struct dwarf2_cu
*origin_cu
;
11170 struct pending
**origin_previous_list_in_scope
;
11172 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11176 /* Note that following die references may follow to a die in a
11180 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11182 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11184 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11185 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11187 if (die
->tag
!= origin_die
->tag
11188 && !(die
->tag
== DW_TAG_inlined_subroutine
11189 && origin_die
->tag
== DW_TAG_subprogram
))
11190 complaint (&symfile_complaints
,
11191 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11192 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11194 child_die
= die
->child
;
11195 die_children_count
= 0;
11196 while (child_die
&& child_die
->tag
)
11198 child_die
= sibling_die (child_die
);
11199 die_children_count
++;
11201 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11202 cleanups
= make_cleanup (xfree
, offsets
);
11204 offsets_end
= offsets
;
11205 child_die
= die
->child
;
11206 while (child_die
&& child_die
->tag
)
11208 /* For each CHILD_DIE, find the corresponding child of
11209 ORIGIN_DIE. If there is more than one layer of
11210 DW_AT_abstract_origin, follow them all; there shouldn't be,
11211 but GCC versions at least through 4.4 generate this (GCC PR
11213 struct die_info
*child_origin_die
= child_die
;
11214 struct dwarf2_cu
*child_origin_cu
= cu
;
11218 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11222 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11226 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11227 counterpart may exist. */
11228 if (child_origin_die
!= child_die
)
11230 if (child_die
->tag
!= child_origin_die
->tag
11231 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11232 && child_origin_die
->tag
== DW_TAG_subprogram
))
11233 complaint (&symfile_complaints
,
11234 _("Child DIE 0x%x and its abstract origin 0x%x have "
11235 "different tags"), child_die
->offset
.sect_off
,
11236 child_origin_die
->offset
.sect_off
);
11237 if (child_origin_die
->parent
!= origin_die
)
11238 complaint (&symfile_complaints
,
11239 _("Child DIE 0x%x and its abstract origin 0x%x have "
11240 "different parents"), child_die
->offset
.sect_off
,
11241 child_origin_die
->offset
.sect_off
);
11243 *offsets_end
++ = child_origin_die
->offset
;
11245 child_die
= sibling_die (child_die
);
11247 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11248 unsigned_int_compar
);
11249 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11250 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11251 complaint (&symfile_complaints
,
11252 _("Multiple children of DIE 0x%x refer "
11253 "to DIE 0x%x as their abstract origin"),
11254 die
->offset
.sect_off
, offsetp
->sect_off
);
11257 origin_child_die
= origin_die
->child
;
11258 while (origin_child_die
&& origin_child_die
->tag
)
11260 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11261 while (offsetp
< offsets_end
11262 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11264 if (offsetp
>= offsets_end
11265 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11267 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11268 Check whether we're already processing ORIGIN_CHILD_DIE.
11269 This can happen with mutually referenced abstract_origins.
11271 if (!origin_child_die
->in_process
)
11272 process_die (origin_child_die
, origin_cu
);
11274 origin_child_die
= sibling_die (origin_child_die
);
11276 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11278 do_cleanups (cleanups
);
11282 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11284 struct objfile
*objfile
= cu
->objfile
;
11285 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11286 struct context_stack
*newobj
;
11289 struct die_info
*child_die
;
11290 struct attribute
*attr
, *call_line
, *call_file
;
11292 CORE_ADDR baseaddr
;
11293 struct block
*block
;
11294 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11295 VEC (symbolp
) *template_args
= NULL
;
11296 struct template_symbol
*templ_func
= NULL
;
11300 /* If we do not have call site information, we can't show the
11301 caller of this inlined function. That's too confusing, so
11302 only use the scope for local variables. */
11303 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11304 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11305 if (call_line
== NULL
|| call_file
== NULL
)
11307 read_lexical_block_scope (die
, cu
);
11312 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11314 name
= dwarf2_name (die
, cu
);
11316 /* Ignore functions with missing or empty names. These are actually
11317 illegal according to the DWARF standard. */
11320 complaint (&symfile_complaints
,
11321 _("missing name for subprogram DIE at %d"),
11322 die
->offset
.sect_off
);
11326 /* Ignore functions with missing or invalid low and high pc attributes. */
11327 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11329 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11330 if (!attr
|| !DW_UNSND (attr
))
11331 complaint (&symfile_complaints
,
11332 _("cannot get low and high bounds "
11333 "for subprogram DIE at %d"),
11334 die
->offset
.sect_off
);
11338 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11339 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11341 /* If we have any template arguments, then we must allocate a
11342 different sort of symbol. */
11343 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11345 if (child_die
->tag
== DW_TAG_template_type_param
11346 || child_die
->tag
== DW_TAG_template_value_param
)
11348 templ_func
= allocate_template_symbol (objfile
);
11349 templ_func
->base
.is_cplus_template_function
= 1;
11354 newobj
= push_context (0, lowpc
);
11355 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11356 (struct symbol
*) templ_func
);
11358 /* If there is a location expression for DW_AT_frame_base, record
11360 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11362 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11364 cu
->list_in_scope
= &local_symbols
;
11366 if (die
->child
!= NULL
)
11368 child_die
= die
->child
;
11369 while (child_die
&& child_die
->tag
)
11371 if (child_die
->tag
== DW_TAG_template_type_param
11372 || child_die
->tag
== DW_TAG_template_value_param
)
11374 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11377 VEC_safe_push (symbolp
, template_args
, arg
);
11380 process_die (child_die
, cu
);
11381 child_die
= sibling_die (child_die
);
11385 inherit_abstract_dies (die
, cu
);
11387 /* If we have a DW_AT_specification, we might need to import using
11388 directives from the context of the specification DIE. See the
11389 comment in determine_prefix. */
11390 if (cu
->language
== language_cplus
11391 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11393 struct dwarf2_cu
*spec_cu
= cu
;
11394 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11398 child_die
= spec_die
->child
;
11399 while (child_die
&& child_die
->tag
)
11401 if (child_die
->tag
== DW_TAG_imported_module
)
11402 process_die (child_die
, spec_cu
);
11403 child_die
= sibling_die (child_die
);
11406 /* In some cases, GCC generates specification DIEs that
11407 themselves contain DW_AT_specification attributes. */
11408 spec_die
= die_specification (spec_die
, &spec_cu
);
11412 newobj
= pop_context ();
11413 /* Make a block for the local symbols within. */
11414 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11417 /* For C++, set the block's scope. */
11418 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11419 && cu
->processing_has_namespace_info
)
11420 block_set_scope (block
, determine_prefix (die
, cu
),
11421 &objfile
->objfile_obstack
);
11423 /* If we have address ranges, record them. */
11424 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11426 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11428 /* Attach template arguments to function. */
11429 if (! VEC_empty (symbolp
, template_args
))
11431 gdb_assert (templ_func
!= NULL
);
11433 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11434 templ_func
->template_arguments
11435 = obstack_alloc (&objfile
->objfile_obstack
,
11436 (templ_func
->n_template_arguments
11437 * sizeof (struct symbol
*)));
11438 memcpy (templ_func
->template_arguments
,
11439 VEC_address (symbolp
, template_args
),
11440 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11441 VEC_free (symbolp
, template_args
);
11444 /* In C++, we can have functions nested inside functions (e.g., when
11445 a function declares a class that has methods). This means that
11446 when we finish processing a function scope, we may need to go
11447 back to building a containing block's symbol lists. */
11448 local_symbols
= newobj
->locals
;
11449 using_directives
= newobj
->using_directives
;
11451 /* If we've finished processing a top-level function, subsequent
11452 symbols go in the file symbol list. */
11453 if (outermost_context_p ())
11454 cu
->list_in_scope
= &file_symbols
;
11457 /* Process all the DIES contained within a lexical block scope. Start
11458 a new scope, process the dies, and then close the scope. */
11461 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11463 struct objfile
*objfile
= cu
->objfile
;
11464 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11465 struct context_stack
*newobj
;
11466 CORE_ADDR lowpc
, highpc
;
11467 struct die_info
*child_die
;
11468 CORE_ADDR baseaddr
;
11470 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11472 /* Ignore blocks with missing or invalid low and high pc attributes. */
11473 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11474 as multiple lexical blocks? Handling children in a sane way would
11475 be nasty. Might be easier to properly extend generic blocks to
11476 describe ranges. */
11477 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11479 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11480 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11482 push_context (0, lowpc
);
11483 if (die
->child
!= NULL
)
11485 child_die
= die
->child
;
11486 while (child_die
&& child_die
->tag
)
11488 process_die (child_die
, cu
);
11489 child_die
= sibling_die (child_die
);
11492 newobj
= pop_context ();
11494 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11496 struct block
*block
11497 = finish_block (0, &local_symbols
, newobj
->old_blocks
,
11498 newobj
->start_addr
, highpc
);
11500 /* Note that recording ranges after traversing children, as we
11501 do here, means that recording a parent's ranges entails
11502 walking across all its children's ranges as they appear in
11503 the address map, which is quadratic behavior.
11505 It would be nicer to record the parent's ranges before
11506 traversing its children, simply overriding whatever you find
11507 there. But since we don't even decide whether to create a
11508 block until after we've traversed its children, that's hard
11510 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11512 local_symbols
= newobj
->locals
;
11513 using_directives
= newobj
->using_directives
;
11516 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11519 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11521 struct objfile
*objfile
= cu
->objfile
;
11522 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11523 CORE_ADDR pc
, baseaddr
;
11524 struct attribute
*attr
;
11525 struct call_site
*call_site
, call_site_local
;
11528 struct die_info
*child_die
;
11530 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11532 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11535 complaint (&symfile_complaints
,
11536 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11537 "DIE 0x%x [in module %s]"),
11538 die
->offset
.sect_off
, objfile_name (objfile
));
11541 pc
= attr_value_as_address (attr
) + baseaddr
;
11542 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11544 if (cu
->call_site_htab
== NULL
)
11545 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11546 NULL
, &objfile
->objfile_obstack
,
11547 hashtab_obstack_allocate
, NULL
);
11548 call_site_local
.pc
= pc
;
11549 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11552 complaint (&symfile_complaints
,
11553 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11554 "DIE 0x%x [in module %s]"),
11555 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11556 objfile_name (objfile
));
11560 /* Count parameters at the caller. */
11563 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11564 child_die
= sibling_die (child_die
))
11566 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11568 complaint (&symfile_complaints
,
11569 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11570 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11571 child_die
->tag
, child_die
->offset
.sect_off
,
11572 objfile_name (objfile
));
11579 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11580 (sizeof (*call_site
)
11581 + (sizeof (*call_site
->parameter
)
11582 * (nparams
- 1))));
11584 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11585 call_site
->pc
= pc
;
11587 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11589 struct die_info
*func_die
;
11591 /* Skip also over DW_TAG_inlined_subroutine. */
11592 for (func_die
= die
->parent
;
11593 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11594 && func_die
->tag
!= DW_TAG_subroutine_type
;
11595 func_die
= func_die
->parent
);
11597 /* DW_AT_GNU_all_call_sites is a superset
11598 of DW_AT_GNU_all_tail_call_sites. */
11600 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11601 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11603 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11604 not complete. But keep CALL_SITE for look ups via call_site_htab,
11605 both the initial caller containing the real return address PC and
11606 the final callee containing the current PC of a chain of tail
11607 calls do not need to have the tail call list complete. But any
11608 function candidate for a virtual tail call frame searched via
11609 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11610 determined unambiguously. */
11614 struct type
*func_type
= NULL
;
11617 func_type
= get_die_type (func_die
, cu
);
11618 if (func_type
!= NULL
)
11620 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11622 /* Enlist this call site to the function. */
11623 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11624 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11627 complaint (&symfile_complaints
,
11628 _("Cannot find function owning DW_TAG_GNU_call_site "
11629 "DIE 0x%x [in module %s]"),
11630 die
->offset
.sect_off
, objfile_name (objfile
));
11634 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11636 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11637 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11638 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11639 /* Keep NULL DWARF_BLOCK. */;
11640 else if (attr_form_is_block (attr
))
11642 struct dwarf2_locexpr_baton
*dlbaton
;
11644 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11645 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11646 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11647 dlbaton
->per_cu
= cu
->per_cu
;
11649 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11651 else if (attr_form_is_ref (attr
))
11653 struct dwarf2_cu
*target_cu
= cu
;
11654 struct die_info
*target_die
;
11656 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11657 gdb_assert (target_cu
->objfile
== objfile
);
11658 if (die_is_declaration (target_die
, target_cu
))
11660 const char *target_physname
= NULL
;
11661 struct attribute
*target_attr
;
11663 /* Prefer the mangled name; otherwise compute the demangled one. */
11664 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11665 if (target_attr
== NULL
)
11666 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11668 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11669 target_physname
= DW_STRING (target_attr
);
11671 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11672 if (target_physname
== NULL
)
11673 complaint (&symfile_complaints
,
11674 _("DW_AT_GNU_call_site_target target DIE has invalid "
11675 "physname, for referencing DIE 0x%x [in module %s]"),
11676 die
->offset
.sect_off
, objfile_name (objfile
));
11678 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11684 /* DW_AT_entry_pc should be preferred. */
11685 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11686 complaint (&symfile_complaints
,
11687 _("DW_AT_GNU_call_site_target target DIE has invalid "
11688 "low pc, for referencing DIE 0x%x [in module %s]"),
11689 die
->offset
.sect_off
, objfile_name (objfile
));
11692 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11693 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11698 complaint (&symfile_complaints
,
11699 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11700 "block nor reference, for DIE 0x%x [in module %s]"),
11701 die
->offset
.sect_off
, objfile_name (objfile
));
11703 call_site
->per_cu
= cu
->per_cu
;
11705 for (child_die
= die
->child
;
11706 child_die
&& child_die
->tag
;
11707 child_die
= sibling_die (child_die
))
11709 struct call_site_parameter
*parameter
;
11710 struct attribute
*loc
, *origin
;
11712 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11714 /* Already printed the complaint above. */
11718 gdb_assert (call_site
->parameter_count
< nparams
);
11719 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11721 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11722 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11723 register is contained in DW_AT_GNU_call_site_value. */
11725 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11726 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11727 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11729 sect_offset offset
;
11731 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11732 offset
= dwarf2_get_ref_die_offset (origin
);
11733 if (!offset_in_cu_p (&cu
->header
, offset
))
11735 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11736 binding can be done only inside one CU. Such referenced DIE
11737 therefore cannot be even moved to DW_TAG_partial_unit. */
11738 complaint (&symfile_complaints
,
11739 _("DW_AT_abstract_origin offset is not in CU for "
11740 "DW_TAG_GNU_call_site child DIE 0x%x "
11742 child_die
->offset
.sect_off
, objfile_name (objfile
));
11745 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11746 - cu
->header
.offset
.sect_off
);
11748 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11750 complaint (&symfile_complaints
,
11751 _("No DW_FORM_block* DW_AT_location for "
11752 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11753 child_die
->offset
.sect_off
, objfile_name (objfile
));
11758 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11759 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11760 if (parameter
->u
.dwarf_reg
!= -1)
11761 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11762 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11763 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11764 ¶meter
->u
.fb_offset
))
11765 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11768 complaint (&symfile_complaints
,
11769 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11770 "for DW_FORM_block* DW_AT_location is supported for "
11771 "DW_TAG_GNU_call_site child DIE 0x%x "
11773 child_die
->offset
.sect_off
, objfile_name (objfile
));
11778 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11779 if (!attr_form_is_block (attr
))
11781 complaint (&symfile_complaints
,
11782 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11783 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11784 child_die
->offset
.sect_off
, objfile_name (objfile
));
11787 parameter
->value
= DW_BLOCK (attr
)->data
;
11788 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11790 /* Parameters are not pre-cleared by memset above. */
11791 parameter
->data_value
= NULL
;
11792 parameter
->data_value_size
= 0;
11793 call_site
->parameter_count
++;
11795 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11798 if (!attr_form_is_block (attr
))
11799 complaint (&symfile_complaints
,
11800 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11801 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11802 child_die
->offset
.sect_off
, objfile_name (objfile
));
11805 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11806 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11812 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11813 Return 1 if the attributes are present and valid, otherwise, return 0.
11814 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11817 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11818 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11819 struct partial_symtab
*ranges_pst
)
11821 struct objfile
*objfile
= cu
->objfile
;
11822 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11823 struct comp_unit_head
*cu_header
= &cu
->header
;
11824 bfd
*obfd
= objfile
->obfd
;
11825 unsigned int addr_size
= cu_header
->addr_size
;
11826 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11827 /* Base address selection entry. */
11830 unsigned int dummy
;
11831 const gdb_byte
*buffer
;
11835 CORE_ADDR high
= 0;
11836 CORE_ADDR baseaddr
;
11838 found_base
= cu
->base_known
;
11839 base
= cu
->base_address
;
11841 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11842 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11844 complaint (&symfile_complaints
,
11845 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11849 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11851 /* Read in the largest possible address. */
11852 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11853 if ((marker
& mask
) == mask
)
11855 /* If we found the largest possible address, then
11856 read the base address. */
11857 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11858 buffer
+= 2 * addr_size
;
11859 offset
+= 2 * addr_size
;
11865 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11869 CORE_ADDR range_beginning
, range_end
;
11871 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11872 buffer
+= addr_size
;
11873 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11874 buffer
+= addr_size
;
11875 offset
+= 2 * addr_size
;
11877 /* An end of list marker is a pair of zero addresses. */
11878 if (range_beginning
== 0 && range_end
== 0)
11879 /* Found the end of list entry. */
11882 /* Each base address selection entry is a pair of 2 values.
11883 The first is the largest possible address, the second is
11884 the base address. Check for a base address here. */
11885 if ((range_beginning
& mask
) == mask
)
11887 /* If we found the largest possible address, then
11888 read the base address. */
11889 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11896 /* We have no valid base address for the ranges
11898 complaint (&symfile_complaints
,
11899 _("Invalid .debug_ranges data (no base address)"));
11903 if (range_beginning
> range_end
)
11905 /* Inverted range entries are invalid. */
11906 complaint (&symfile_complaints
,
11907 _("Invalid .debug_ranges data (inverted range)"));
11911 /* Empty range entries have no effect. */
11912 if (range_beginning
== range_end
)
11915 range_beginning
+= base
;
11918 /* A not-uncommon case of bad debug info.
11919 Don't pollute the addrmap with bad data. */
11920 if (range_beginning
+ baseaddr
== 0
11921 && !dwarf2_per_objfile
->has_section_at_zero
)
11923 complaint (&symfile_complaints
,
11924 _(".debug_ranges entry has start address of zero"
11925 " [in module %s]"), objfile_name (objfile
));
11929 if (ranges_pst
!= NULL
)
11934 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11935 range_beginning
+ baseaddr
);
11936 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11937 range_end
+ baseaddr
);
11938 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11942 /* FIXME: This is recording everything as a low-high
11943 segment of consecutive addresses. We should have a
11944 data structure for discontiguous block ranges
11948 low
= range_beginning
;
11954 if (range_beginning
< low
)
11955 low
= range_beginning
;
11956 if (range_end
> high
)
11962 /* If the first entry is an end-of-list marker, the range
11963 describes an empty scope, i.e. no instructions. */
11969 *high_return
= high
;
11973 /* Get low and high pc attributes from a die. Return 1 if the attributes
11974 are present and valid, otherwise, return 0. Return -1 if the range is
11975 discontinuous, i.e. derived from DW_AT_ranges information. */
11978 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
11979 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
11980 struct partial_symtab
*pst
)
11982 struct attribute
*attr
;
11983 struct attribute
*attr_high
;
11985 CORE_ADDR high
= 0;
11988 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11991 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11994 low
= attr_value_as_address (attr
);
11995 high
= attr_value_as_address (attr_high
);
11996 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12000 /* Found high w/o low attribute. */
12003 /* Found consecutive range of addresses. */
12008 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12011 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12012 We take advantage of the fact that DW_AT_ranges does not appear
12013 in DW_TAG_compile_unit of DWO files. */
12014 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12015 unsigned int ranges_offset
= (DW_UNSND (attr
)
12016 + (need_ranges_base
12020 /* Value of the DW_AT_ranges attribute is the offset in the
12021 .debug_ranges section. */
12022 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12024 /* Found discontinuous range of addresses. */
12029 /* read_partial_die has also the strict LOW < HIGH requirement. */
12033 /* When using the GNU linker, .gnu.linkonce. sections are used to
12034 eliminate duplicate copies of functions and vtables and such.
12035 The linker will arbitrarily choose one and discard the others.
12036 The AT_*_pc values for such functions refer to local labels in
12037 these sections. If the section from that file was discarded, the
12038 labels are not in the output, so the relocs get a value of 0.
12039 If this is a discarded function, mark the pc bounds as invalid,
12040 so that GDB will ignore it. */
12041 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12050 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12051 its low and high PC addresses. Do nothing if these addresses could not
12052 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12053 and HIGHPC to the high address if greater than HIGHPC. */
12056 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12057 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12058 struct dwarf2_cu
*cu
)
12060 CORE_ADDR low
, high
;
12061 struct die_info
*child
= die
->child
;
12063 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12065 *lowpc
= min (*lowpc
, low
);
12066 *highpc
= max (*highpc
, high
);
12069 /* If the language does not allow nested subprograms (either inside
12070 subprograms or lexical blocks), we're done. */
12071 if (cu
->language
!= language_ada
)
12074 /* Check all the children of the given DIE. If it contains nested
12075 subprograms, then check their pc bounds. Likewise, we need to
12076 check lexical blocks as well, as they may also contain subprogram
12078 while (child
&& child
->tag
)
12080 if (child
->tag
== DW_TAG_subprogram
12081 || child
->tag
== DW_TAG_lexical_block
)
12082 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12083 child
= sibling_die (child
);
12087 /* Get the low and high pc's represented by the scope DIE, and store
12088 them in *LOWPC and *HIGHPC. If the correct values can't be
12089 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12092 get_scope_pc_bounds (struct die_info
*die
,
12093 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12094 struct dwarf2_cu
*cu
)
12096 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12097 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12098 CORE_ADDR current_low
, current_high
;
12100 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12102 best_low
= current_low
;
12103 best_high
= current_high
;
12107 struct die_info
*child
= die
->child
;
12109 while (child
&& child
->tag
)
12111 switch (child
->tag
) {
12112 case DW_TAG_subprogram
:
12113 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12115 case DW_TAG_namespace
:
12116 case DW_TAG_module
:
12117 /* FIXME: carlton/2004-01-16: Should we do this for
12118 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12119 that current GCC's always emit the DIEs corresponding
12120 to definitions of methods of classes as children of a
12121 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12122 the DIEs giving the declarations, which could be
12123 anywhere). But I don't see any reason why the
12124 standards says that they have to be there. */
12125 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12127 if (current_low
!= ((CORE_ADDR
) -1))
12129 best_low
= min (best_low
, current_low
);
12130 best_high
= max (best_high
, current_high
);
12138 child
= sibling_die (child
);
12143 *highpc
= best_high
;
12146 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12150 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12151 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12153 struct objfile
*objfile
= cu
->objfile
;
12154 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12155 struct attribute
*attr
;
12156 struct attribute
*attr_high
;
12158 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12161 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12164 CORE_ADDR low
= attr_value_as_address (attr
);
12165 CORE_ADDR high
= attr_value_as_address (attr_high
);
12167 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12170 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12171 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12172 record_block_range (block
, low
, high
- 1);
12176 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12179 bfd
*obfd
= objfile
->obfd
;
12180 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12181 We take advantage of the fact that DW_AT_ranges does not appear
12182 in DW_TAG_compile_unit of DWO files. */
12183 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12185 /* The value of the DW_AT_ranges attribute is the offset of the
12186 address range list in the .debug_ranges section. */
12187 unsigned long offset
= (DW_UNSND (attr
)
12188 + (need_ranges_base
? cu
->ranges_base
: 0));
12189 const gdb_byte
*buffer
;
12191 /* For some target architectures, but not others, the
12192 read_address function sign-extends the addresses it returns.
12193 To recognize base address selection entries, we need a
12195 unsigned int addr_size
= cu
->header
.addr_size
;
12196 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12198 /* The base address, to which the next pair is relative. Note
12199 that this 'base' is a DWARF concept: most entries in a range
12200 list are relative, to reduce the number of relocs against the
12201 debugging information. This is separate from this function's
12202 'baseaddr' argument, which GDB uses to relocate debugging
12203 information from a shared library based on the address at
12204 which the library was loaded. */
12205 CORE_ADDR base
= cu
->base_address
;
12206 int base_known
= cu
->base_known
;
12208 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12209 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12211 complaint (&symfile_complaints
,
12212 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12216 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12220 unsigned int bytes_read
;
12221 CORE_ADDR start
, end
;
12223 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12224 buffer
+= bytes_read
;
12225 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12226 buffer
+= bytes_read
;
12228 /* Did we find the end of the range list? */
12229 if (start
== 0 && end
== 0)
12232 /* Did we find a base address selection entry? */
12233 else if ((start
& base_select_mask
) == base_select_mask
)
12239 /* We found an ordinary address range. */
12244 complaint (&symfile_complaints
,
12245 _("Invalid .debug_ranges data "
12246 "(no base address)"));
12252 /* Inverted range entries are invalid. */
12253 complaint (&symfile_complaints
,
12254 _("Invalid .debug_ranges data "
12255 "(inverted range)"));
12259 /* Empty range entries have no effect. */
12263 start
+= base
+ baseaddr
;
12264 end
+= base
+ baseaddr
;
12266 /* A not-uncommon case of bad debug info.
12267 Don't pollute the addrmap with bad data. */
12268 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12270 complaint (&symfile_complaints
,
12271 _(".debug_ranges entry has start address of zero"
12272 " [in module %s]"), objfile_name (objfile
));
12276 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12277 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12278 record_block_range (block
, start
, end
- 1);
12284 /* Check whether the producer field indicates either of GCC < 4.6, or the
12285 Intel C/C++ compiler, and cache the result in CU. */
12288 check_producer (struct dwarf2_cu
*cu
)
12293 if (cu
->producer
== NULL
)
12295 /* For unknown compilers expect their behavior is DWARF version
12298 GCC started to support .debug_types sections by -gdwarf-4 since
12299 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12300 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12301 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12302 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12304 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12306 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12307 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12309 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
12310 cu
->producer_is_icc
= 1;
12313 /* For other non-GCC compilers, expect their behavior is DWARF version
12317 cu
->checked_producer
= 1;
12320 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12321 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12322 during 4.6.0 experimental. */
12325 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12327 if (!cu
->checked_producer
)
12328 check_producer (cu
);
12330 return cu
->producer_is_gxx_lt_4_6
;
12333 /* Return the default accessibility type if it is not overriden by
12334 DW_AT_accessibility. */
12336 static enum dwarf_access_attribute
12337 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12339 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12341 /* The default DWARF 2 accessibility for members is public, the default
12342 accessibility for inheritance is private. */
12344 if (die
->tag
!= DW_TAG_inheritance
)
12345 return DW_ACCESS_public
;
12347 return DW_ACCESS_private
;
12351 /* DWARF 3+ defines the default accessibility a different way. The same
12352 rules apply now for DW_TAG_inheritance as for the members and it only
12353 depends on the container kind. */
12355 if (die
->parent
->tag
== DW_TAG_class_type
)
12356 return DW_ACCESS_private
;
12358 return DW_ACCESS_public
;
12362 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12363 offset. If the attribute was not found return 0, otherwise return
12364 1. If it was found but could not properly be handled, set *OFFSET
12368 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12371 struct attribute
*attr
;
12373 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12378 /* Note that we do not check for a section offset first here.
12379 This is because DW_AT_data_member_location is new in DWARF 4,
12380 so if we see it, we can assume that a constant form is really
12381 a constant and not a section offset. */
12382 if (attr_form_is_constant (attr
))
12383 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12384 else if (attr_form_is_section_offset (attr
))
12385 dwarf2_complex_location_expr_complaint ();
12386 else if (attr_form_is_block (attr
))
12387 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12389 dwarf2_complex_location_expr_complaint ();
12397 /* Add an aggregate field to the field list. */
12400 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12401 struct dwarf2_cu
*cu
)
12403 struct objfile
*objfile
= cu
->objfile
;
12404 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12405 struct nextfield
*new_field
;
12406 struct attribute
*attr
;
12408 const char *fieldname
= "";
12410 /* Allocate a new field list entry and link it in. */
12411 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12412 make_cleanup (xfree
, new_field
);
12413 memset (new_field
, 0, sizeof (struct nextfield
));
12415 if (die
->tag
== DW_TAG_inheritance
)
12417 new_field
->next
= fip
->baseclasses
;
12418 fip
->baseclasses
= new_field
;
12422 new_field
->next
= fip
->fields
;
12423 fip
->fields
= new_field
;
12427 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12429 new_field
->accessibility
= DW_UNSND (attr
);
12431 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12432 if (new_field
->accessibility
!= DW_ACCESS_public
)
12433 fip
->non_public_fields
= 1;
12435 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12437 new_field
->virtuality
= DW_UNSND (attr
);
12439 new_field
->virtuality
= DW_VIRTUALITY_none
;
12441 fp
= &new_field
->field
;
12443 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12447 /* Data member other than a C++ static data member. */
12449 /* Get type of field. */
12450 fp
->type
= die_type (die
, cu
);
12452 SET_FIELD_BITPOS (*fp
, 0);
12454 /* Get bit size of field (zero if none). */
12455 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12458 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12462 FIELD_BITSIZE (*fp
) = 0;
12465 /* Get bit offset of field. */
12466 if (handle_data_member_location (die
, cu
, &offset
))
12467 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12468 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12471 if (gdbarch_bits_big_endian (gdbarch
))
12473 /* For big endian bits, the DW_AT_bit_offset gives the
12474 additional bit offset from the MSB of the containing
12475 anonymous object to the MSB of the field. We don't
12476 have to do anything special since we don't need to
12477 know the size of the anonymous object. */
12478 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12482 /* For little endian bits, compute the bit offset to the
12483 MSB of the anonymous object, subtract off the number of
12484 bits from the MSB of the field to the MSB of the
12485 object, and then subtract off the number of bits of
12486 the field itself. The result is the bit offset of
12487 the LSB of the field. */
12488 int anonymous_size
;
12489 int bit_offset
= DW_UNSND (attr
);
12491 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12494 /* The size of the anonymous object containing
12495 the bit field is explicit, so use the
12496 indicated size (in bytes). */
12497 anonymous_size
= DW_UNSND (attr
);
12501 /* The size of the anonymous object containing
12502 the bit field must be inferred from the type
12503 attribute of the data member containing the
12505 anonymous_size
= TYPE_LENGTH (fp
->type
);
12507 SET_FIELD_BITPOS (*fp
,
12508 (FIELD_BITPOS (*fp
)
12509 + anonymous_size
* bits_per_byte
12510 - bit_offset
- FIELD_BITSIZE (*fp
)));
12514 /* Get name of field. */
12515 fieldname
= dwarf2_name (die
, cu
);
12516 if (fieldname
== NULL
)
12519 /* The name is already allocated along with this objfile, so we don't
12520 need to duplicate it for the type. */
12521 fp
->name
= fieldname
;
12523 /* Change accessibility for artificial fields (e.g. virtual table
12524 pointer or virtual base class pointer) to private. */
12525 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12527 FIELD_ARTIFICIAL (*fp
) = 1;
12528 new_field
->accessibility
= DW_ACCESS_private
;
12529 fip
->non_public_fields
= 1;
12532 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12534 /* C++ static member. */
12536 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12537 is a declaration, but all versions of G++ as of this writing
12538 (so through at least 3.2.1) incorrectly generate
12539 DW_TAG_variable tags. */
12541 const char *physname
;
12543 /* Get name of field. */
12544 fieldname
= dwarf2_name (die
, cu
);
12545 if (fieldname
== NULL
)
12548 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12550 /* Only create a symbol if this is an external value.
12551 new_symbol checks this and puts the value in the global symbol
12552 table, which we want. If it is not external, new_symbol
12553 will try to put the value in cu->list_in_scope which is wrong. */
12554 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12556 /* A static const member, not much different than an enum as far as
12557 we're concerned, except that we can support more types. */
12558 new_symbol (die
, NULL
, cu
);
12561 /* Get physical name. */
12562 physname
= dwarf2_physname (fieldname
, die
, cu
);
12564 /* The name is already allocated along with this objfile, so we don't
12565 need to duplicate it for the type. */
12566 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12567 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12568 FIELD_NAME (*fp
) = fieldname
;
12570 else if (die
->tag
== DW_TAG_inheritance
)
12574 /* C++ base class field. */
12575 if (handle_data_member_location (die
, cu
, &offset
))
12576 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12577 FIELD_BITSIZE (*fp
) = 0;
12578 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12579 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12580 fip
->nbaseclasses
++;
12584 /* Add a typedef defined in the scope of the FIP's class. */
12587 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12588 struct dwarf2_cu
*cu
)
12590 struct objfile
*objfile
= cu
->objfile
;
12591 struct typedef_field_list
*new_field
;
12592 struct attribute
*attr
;
12593 struct typedef_field
*fp
;
12594 char *fieldname
= "";
12596 /* Allocate a new field list entry and link it in. */
12597 new_field
= xzalloc (sizeof (*new_field
));
12598 make_cleanup (xfree
, new_field
);
12600 gdb_assert (die
->tag
== DW_TAG_typedef
);
12602 fp
= &new_field
->field
;
12604 /* Get name of field. */
12605 fp
->name
= dwarf2_name (die
, cu
);
12606 if (fp
->name
== NULL
)
12609 fp
->type
= read_type_die (die
, cu
);
12611 new_field
->next
= fip
->typedef_field_list
;
12612 fip
->typedef_field_list
= new_field
;
12613 fip
->typedef_field_list_count
++;
12616 /* Create the vector of fields, and attach it to the type. */
12619 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12620 struct dwarf2_cu
*cu
)
12622 int nfields
= fip
->nfields
;
12624 /* Record the field count, allocate space for the array of fields,
12625 and create blank accessibility bitfields if necessary. */
12626 TYPE_NFIELDS (type
) = nfields
;
12627 TYPE_FIELDS (type
) = (struct field
*)
12628 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12629 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12631 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12633 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12635 TYPE_FIELD_PRIVATE_BITS (type
) =
12636 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12637 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12639 TYPE_FIELD_PROTECTED_BITS (type
) =
12640 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12641 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12643 TYPE_FIELD_IGNORE_BITS (type
) =
12644 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12645 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12648 /* If the type has baseclasses, allocate and clear a bit vector for
12649 TYPE_FIELD_VIRTUAL_BITS. */
12650 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12652 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12653 unsigned char *pointer
;
12655 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12656 pointer
= TYPE_ALLOC (type
, num_bytes
);
12657 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12658 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12659 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12662 /* Copy the saved-up fields into the field vector. Start from the head of
12663 the list, adding to the tail of the field array, so that they end up in
12664 the same order in the array in which they were added to the list. */
12665 while (nfields
-- > 0)
12667 struct nextfield
*fieldp
;
12671 fieldp
= fip
->fields
;
12672 fip
->fields
= fieldp
->next
;
12676 fieldp
= fip
->baseclasses
;
12677 fip
->baseclasses
= fieldp
->next
;
12680 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12681 switch (fieldp
->accessibility
)
12683 case DW_ACCESS_private
:
12684 if (cu
->language
!= language_ada
)
12685 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12688 case DW_ACCESS_protected
:
12689 if (cu
->language
!= language_ada
)
12690 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12693 case DW_ACCESS_public
:
12697 /* Unknown accessibility. Complain and treat it as public. */
12699 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12700 fieldp
->accessibility
);
12704 if (nfields
< fip
->nbaseclasses
)
12706 switch (fieldp
->virtuality
)
12708 case DW_VIRTUALITY_virtual
:
12709 case DW_VIRTUALITY_pure_virtual
:
12710 if (cu
->language
== language_ada
)
12711 error (_("unexpected virtuality in component of Ada type"));
12712 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12719 /* Return true if this member function is a constructor, false
12723 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12725 const char *fieldname
;
12726 const char *type_name
;
12729 if (die
->parent
== NULL
)
12732 if (die
->parent
->tag
!= DW_TAG_structure_type
12733 && die
->parent
->tag
!= DW_TAG_union_type
12734 && die
->parent
->tag
!= DW_TAG_class_type
)
12737 fieldname
= dwarf2_name (die
, cu
);
12738 type_name
= dwarf2_name (die
->parent
, cu
);
12739 if (fieldname
== NULL
|| type_name
== NULL
)
12742 len
= strlen (fieldname
);
12743 return (strncmp (fieldname
, type_name
, len
) == 0
12744 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12747 /* Add a member function to the proper fieldlist. */
12750 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12751 struct type
*type
, struct dwarf2_cu
*cu
)
12753 struct objfile
*objfile
= cu
->objfile
;
12754 struct attribute
*attr
;
12755 struct fnfieldlist
*flp
;
12757 struct fn_field
*fnp
;
12758 const char *fieldname
;
12759 struct nextfnfield
*new_fnfield
;
12760 struct type
*this_type
;
12761 enum dwarf_access_attribute accessibility
;
12763 if (cu
->language
== language_ada
)
12764 error (_("unexpected member function in Ada type"));
12766 /* Get name of member function. */
12767 fieldname
= dwarf2_name (die
, cu
);
12768 if (fieldname
== NULL
)
12771 /* Look up member function name in fieldlist. */
12772 for (i
= 0; i
< fip
->nfnfields
; i
++)
12774 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12778 /* Create new list element if necessary. */
12779 if (i
< fip
->nfnfields
)
12780 flp
= &fip
->fnfieldlists
[i
];
12783 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12785 fip
->fnfieldlists
= (struct fnfieldlist
*)
12786 xrealloc (fip
->fnfieldlists
,
12787 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12788 * sizeof (struct fnfieldlist
));
12789 if (fip
->nfnfields
== 0)
12790 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12792 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12793 flp
->name
= fieldname
;
12796 i
= fip
->nfnfields
++;
12799 /* Create a new member function field and chain it to the field list
12801 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12802 make_cleanup (xfree
, new_fnfield
);
12803 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12804 new_fnfield
->next
= flp
->head
;
12805 flp
->head
= new_fnfield
;
12808 /* Fill in the member function field info. */
12809 fnp
= &new_fnfield
->fnfield
;
12811 /* Delay processing of the physname until later. */
12812 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12814 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12819 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12820 fnp
->physname
= physname
? physname
: "";
12823 fnp
->type
= alloc_type (objfile
);
12824 this_type
= read_type_die (die
, cu
);
12825 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12827 int nparams
= TYPE_NFIELDS (this_type
);
12829 /* TYPE is the domain of this method, and THIS_TYPE is the type
12830 of the method itself (TYPE_CODE_METHOD). */
12831 smash_to_method_type (fnp
->type
, type
,
12832 TYPE_TARGET_TYPE (this_type
),
12833 TYPE_FIELDS (this_type
),
12834 TYPE_NFIELDS (this_type
),
12835 TYPE_VARARGS (this_type
));
12837 /* Handle static member functions.
12838 Dwarf2 has no clean way to discern C++ static and non-static
12839 member functions. G++ helps GDB by marking the first
12840 parameter for non-static member functions (which is the this
12841 pointer) as artificial. We obtain this information from
12842 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12843 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12844 fnp
->voffset
= VOFFSET_STATIC
;
12847 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12848 dwarf2_full_name (fieldname
, die
, cu
));
12850 /* Get fcontext from DW_AT_containing_type if present. */
12851 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12852 fnp
->fcontext
= die_containing_type (die
, cu
);
12854 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12855 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12857 /* Get accessibility. */
12858 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12860 accessibility
= DW_UNSND (attr
);
12862 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12863 switch (accessibility
)
12865 case DW_ACCESS_private
:
12866 fnp
->is_private
= 1;
12868 case DW_ACCESS_protected
:
12869 fnp
->is_protected
= 1;
12873 /* Check for artificial methods. */
12874 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12875 if (attr
&& DW_UNSND (attr
) != 0)
12876 fnp
->is_artificial
= 1;
12878 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12880 /* Get index in virtual function table if it is a virtual member
12881 function. For older versions of GCC, this is an offset in the
12882 appropriate virtual table, as specified by DW_AT_containing_type.
12883 For everyone else, it is an expression to be evaluated relative
12884 to the object address. */
12886 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12889 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12891 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12893 /* Old-style GCC. */
12894 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12896 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12897 || (DW_BLOCK (attr
)->size
> 1
12898 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12899 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12901 struct dwarf_block blk
;
12904 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12906 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12907 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12908 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12909 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12910 dwarf2_complex_location_expr_complaint ();
12912 fnp
->voffset
/= cu
->header
.addr_size
;
12916 dwarf2_complex_location_expr_complaint ();
12918 if (!fnp
->fcontext
)
12919 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12921 else if (attr_form_is_section_offset (attr
))
12923 dwarf2_complex_location_expr_complaint ();
12927 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12933 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12934 if (attr
&& DW_UNSND (attr
))
12936 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12937 complaint (&symfile_complaints
,
12938 _("Member function \"%s\" (offset %d) is virtual "
12939 "but the vtable offset is not specified"),
12940 fieldname
, die
->offset
.sect_off
);
12941 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12942 TYPE_CPLUS_DYNAMIC (type
) = 1;
12947 /* Create the vector of member function fields, and attach it to the type. */
12950 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12951 struct dwarf2_cu
*cu
)
12953 struct fnfieldlist
*flp
;
12956 if (cu
->language
== language_ada
)
12957 error (_("unexpected member functions in Ada type"));
12959 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12960 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12961 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12963 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12965 struct nextfnfield
*nfp
= flp
->head
;
12966 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12969 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12970 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12971 fn_flp
->fn_fields
= (struct fn_field
*)
12972 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12973 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12974 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12977 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
12980 /* Returns non-zero if NAME is the name of a vtable member in CU's
12981 language, zero otherwise. */
12983 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
12985 static const char vptr
[] = "_vptr";
12986 static const char vtable
[] = "vtable";
12988 /* Look for the C++ and Java forms of the vtable. */
12989 if ((cu
->language
== language_java
12990 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
12991 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
12992 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
12998 /* GCC outputs unnamed structures that are really pointers to member
12999 functions, with the ABI-specified layout. If TYPE describes
13000 such a structure, smash it into a member function type.
13002 GCC shouldn't do this; it should just output pointer to member DIEs.
13003 This is GCC PR debug/28767. */
13006 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13008 struct type
*pfn_type
, *self_type
, *new_type
;
13010 /* Check for a structure with no name and two children. */
13011 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13014 /* Check for __pfn and __delta members. */
13015 if (TYPE_FIELD_NAME (type
, 0) == NULL
13016 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13017 || TYPE_FIELD_NAME (type
, 1) == NULL
13018 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13021 /* Find the type of the method. */
13022 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13023 if (pfn_type
== NULL
13024 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13025 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13028 /* Look for the "this" argument. */
13029 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13030 if (TYPE_NFIELDS (pfn_type
) == 0
13031 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13032 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13035 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13036 new_type
= alloc_type (objfile
);
13037 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13038 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13039 TYPE_VARARGS (pfn_type
));
13040 smash_to_methodptr_type (type
, new_type
);
13043 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13047 producer_is_icc (struct dwarf2_cu
*cu
)
13049 if (!cu
->checked_producer
)
13050 check_producer (cu
);
13052 return cu
->producer_is_icc
;
13055 /* Called when we find the DIE that starts a structure or union scope
13056 (definition) to create a type for the structure or union. Fill in
13057 the type's name and general properties; the members will not be
13058 processed until process_structure_scope. A symbol table entry for
13059 the type will also not be done until process_structure_scope (assuming
13060 the type has a name).
13062 NOTE: we need to call these functions regardless of whether or not the
13063 DIE has a DW_AT_name attribute, since it might be an anonymous
13064 structure or union. This gets the type entered into our set of
13065 user defined types. */
13067 static struct type
*
13068 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13070 struct objfile
*objfile
= cu
->objfile
;
13072 struct attribute
*attr
;
13075 /* If the definition of this type lives in .debug_types, read that type.
13076 Don't follow DW_AT_specification though, that will take us back up
13077 the chain and we want to go down. */
13078 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13081 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13083 /* The type's CU may not be the same as CU.
13084 Ensure TYPE is recorded with CU in die_type_hash. */
13085 return set_die_type (die
, type
, cu
);
13088 type
= alloc_type (objfile
);
13089 INIT_CPLUS_SPECIFIC (type
);
13091 name
= dwarf2_name (die
, cu
);
13094 if (cu
->language
== language_cplus
13095 || cu
->language
== language_java
)
13097 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13099 /* dwarf2_full_name might have already finished building the DIE's
13100 type. If so, there is no need to continue. */
13101 if (get_die_type (die
, cu
) != NULL
)
13102 return get_die_type (die
, cu
);
13104 TYPE_TAG_NAME (type
) = full_name
;
13105 if (die
->tag
== DW_TAG_structure_type
13106 || die
->tag
== DW_TAG_class_type
)
13107 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13111 /* The name is already allocated along with this objfile, so
13112 we don't need to duplicate it for the type. */
13113 TYPE_TAG_NAME (type
) = name
;
13114 if (die
->tag
== DW_TAG_class_type
)
13115 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13119 if (die
->tag
== DW_TAG_structure_type
)
13121 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13123 else if (die
->tag
== DW_TAG_union_type
)
13125 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13129 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13132 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13133 TYPE_DECLARED_CLASS (type
) = 1;
13135 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13138 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13142 TYPE_LENGTH (type
) = 0;
13145 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13147 /* ICC does not output the required DW_AT_declaration
13148 on incomplete types, but gives them a size of zero. */
13149 TYPE_STUB (type
) = 1;
13152 TYPE_STUB_SUPPORTED (type
) = 1;
13154 if (die_is_declaration (die
, cu
))
13155 TYPE_STUB (type
) = 1;
13156 else if (attr
== NULL
&& die
->child
== NULL
13157 && producer_is_realview (cu
->producer
))
13158 /* RealView does not output the required DW_AT_declaration
13159 on incomplete types. */
13160 TYPE_STUB (type
) = 1;
13162 /* We need to add the type field to the die immediately so we don't
13163 infinitely recurse when dealing with pointers to the structure
13164 type within the structure itself. */
13165 set_die_type (die
, type
, cu
);
13167 /* set_die_type should be already done. */
13168 set_descriptive_type (type
, die
, cu
);
13173 /* Finish creating a structure or union type, including filling in
13174 its members and creating a symbol for it. */
13177 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13179 struct objfile
*objfile
= cu
->objfile
;
13180 struct die_info
*child_die
;
13183 type
= get_die_type (die
, cu
);
13185 type
= read_structure_type (die
, cu
);
13187 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13189 struct field_info fi
;
13190 VEC (symbolp
) *template_args
= NULL
;
13191 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13193 memset (&fi
, 0, sizeof (struct field_info
));
13195 child_die
= die
->child
;
13197 while (child_die
&& child_die
->tag
)
13199 if (child_die
->tag
== DW_TAG_member
13200 || child_die
->tag
== DW_TAG_variable
)
13202 /* NOTE: carlton/2002-11-05: A C++ static data member
13203 should be a DW_TAG_member that is a declaration, but
13204 all versions of G++ as of this writing (so through at
13205 least 3.2.1) incorrectly generate DW_TAG_variable
13206 tags for them instead. */
13207 dwarf2_add_field (&fi
, child_die
, cu
);
13209 else if (child_die
->tag
== DW_TAG_subprogram
)
13211 /* C++ member function. */
13212 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13214 else if (child_die
->tag
== DW_TAG_inheritance
)
13216 /* C++ base class field. */
13217 dwarf2_add_field (&fi
, child_die
, cu
);
13219 else if (child_die
->tag
== DW_TAG_typedef
)
13220 dwarf2_add_typedef (&fi
, child_die
, cu
);
13221 else if (child_die
->tag
== DW_TAG_template_type_param
13222 || child_die
->tag
== DW_TAG_template_value_param
)
13224 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13227 VEC_safe_push (symbolp
, template_args
, arg
);
13230 child_die
= sibling_die (child_die
);
13233 /* Attach template arguments to type. */
13234 if (! VEC_empty (symbolp
, template_args
))
13236 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13237 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13238 = VEC_length (symbolp
, template_args
);
13239 TYPE_TEMPLATE_ARGUMENTS (type
)
13240 = obstack_alloc (&objfile
->objfile_obstack
,
13241 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13242 * sizeof (struct symbol
*)));
13243 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13244 VEC_address (symbolp
, template_args
),
13245 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13246 * sizeof (struct symbol
*)));
13247 VEC_free (symbolp
, template_args
);
13250 /* Attach fields and member functions to the type. */
13252 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13255 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13257 /* Get the type which refers to the base class (possibly this
13258 class itself) which contains the vtable pointer for the current
13259 class from the DW_AT_containing_type attribute. This use of
13260 DW_AT_containing_type is a GNU extension. */
13262 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13264 struct type
*t
= die_containing_type (die
, cu
);
13266 set_type_vptr_basetype (type
, t
);
13271 /* Our own class provides vtbl ptr. */
13272 for (i
= TYPE_NFIELDS (t
) - 1;
13273 i
>= TYPE_N_BASECLASSES (t
);
13276 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13278 if (is_vtable_name (fieldname
, cu
))
13280 set_type_vptr_fieldno (type
, i
);
13285 /* Complain if virtual function table field not found. */
13286 if (i
< TYPE_N_BASECLASSES (t
))
13287 complaint (&symfile_complaints
,
13288 _("virtual function table pointer "
13289 "not found when defining class '%s'"),
13290 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13295 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13298 else if (cu
->producer
13299 && strncmp (cu
->producer
,
13300 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
13302 /* The IBM XLC compiler does not provide direct indication
13303 of the containing type, but the vtable pointer is
13304 always named __vfp. */
13308 for (i
= TYPE_NFIELDS (type
) - 1;
13309 i
>= TYPE_N_BASECLASSES (type
);
13312 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13314 set_type_vptr_fieldno (type
, i
);
13315 set_type_vptr_basetype (type
, type
);
13322 /* Copy fi.typedef_field_list linked list elements content into the
13323 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13324 if (fi
.typedef_field_list
)
13326 int i
= fi
.typedef_field_list_count
;
13328 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13329 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13330 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13331 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13333 /* Reverse the list order to keep the debug info elements order. */
13336 struct typedef_field
*dest
, *src
;
13338 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13339 src
= &fi
.typedef_field_list
->field
;
13340 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13345 do_cleanups (back_to
);
13347 if (HAVE_CPLUS_STRUCT (type
))
13348 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13351 quirk_gcc_member_function_pointer (type
, objfile
);
13353 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13354 snapshots) has been known to create a die giving a declaration
13355 for a class that has, as a child, a die giving a definition for a
13356 nested class. So we have to process our children even if the
13357 current die is a declaration. Normally, of course, a declaration
13358 won't have any children at all. */
13360 child_die
= die
->child
;
13362 while (child_die
!= NULL
&& child_die
->tag
)
13364 if (child_die
->tag
== DW_TAG_member
13365 || child_die
->tag
== DW_TAG_variable
13366 || child_die
->tag
== DW_TAG_inheritance
13367 || child_die
->tag
== DW_TAG_template_value_param
13368 || child_die
->tag
== DW_TAG_template_type_param
)
13373 process_die (child_die
, cu
);
13375 child_die
= sibling_die (child_die
);
13378 /* Do not consider external references. According to the DWARF standard,
13379 these DIEs are identified by the fact that they have no byte_size
13380 attribute, and a declaration attribute. */
13381 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13382 || !die_is_declaration (die
, cu
))
13383 new_symbol (die
, type
, cu
);
13386 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13387 update TYPE using some information only available in DIE's children. */
13390 update_enumeration_type_from_children (struct die_info
*die
,
13392 struct dwarf2_cu
*cu
)
13394 struct obstack obstack
;
13395 struct die_info
*child_die
;
13396 int unsigned_enum
= 1;
13399 struct cleanup
*old_chain
;
13401 obstack_init (&obstack
);
13402 old_chain
= make_cleanup_obstack_free (&obstack
);
13404 for (child_die
= die
->child
;
13405 child_die
!= NULL
&& child_die
->tag
;
13406 child_die
= sibling_die (child_die
))
13408 struct attribute
*attr
;
13410 const gdb_byte
*bytes
;
13411 struct dwarf2_locexpr_baton
*baton
;
13414 if (child_die
->tag
!= DW_TAG_enumerator
)
13417 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13421 name
= dwarf2_name (child_die
, cu
);
13423 name
= "<anonymous enumerator>";
13425 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13426 &value
, &bytes
, &baton
);
13432 else if ((mask
& value
) != 0)
13437 /* If we already know that the enum type is neither unsigned, nor
13438 a flag type, no need to look at the rest of the enumerates. */
13439 if (!unsigned_enum
&& !flag_enum
)
13444 TYPE_UNSIGNED (type
) = 1;
13446 TYPE_FLAG_ENUM (type
) = 1;
13448 do_cleanups (old_chain
);
13451 /* Given a DW_AT_enumeration_type die, set its type. We do not
13452 complete the type's fields yet, or create any symbols. */
13454 static struct type
*
13455 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13457 struct objfile
*objfile
= cu
->objfile
;
13459 struct attribute
*attr
;
13462 /* If the definition of this type lives in .debug_types, read that type.
13463 Don't follow DW_AT_specification though, that will take us back up
13464 the chain and we want to go down. */
13465 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13468 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13470 /* The type's CU may not be the same as CU.
13471 Ensure TYPE is recorded with CU in die_type_hash. */
13472 return set_die_type (die
, type
, cu
);
13475 type
= alloc_type (objfile
);
13477 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13478 name
= dwarf2_full_name (NULL
, die
, cu
);
13480 TYPE_TAG_NAME (type
) = name
;
13482 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13485 struct type
*underlying_type
= die_type (die
, cu
);
13487 TYPE_TARGET_TYPE (type
) = underlying_type
;
13490 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13493 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13497 TYPE_LENGTH (type
) = 0;
13500 /* The enumeration DIE can be incomplete. In Ada, any type can be
13501 declared as private in the package spec, and then defined only
13502 inside the package body. Such types are known as Taft Amendment
13503 Types. When another package uses such a type, an incomplete DIE
13504 may be generated by the compiler. */
13505 if (die_is_declaration (die
, cu
))
13506 TYPE_STUB (type
) = 1;
13508 /* Finish the creation of this type by using the enum's children.
13509 We must call this even when the underlying type has been provided
13510 so that we can determine if we're looking at a "flag" enum. */
13511 update_enumeration_type_from_children (die
, type
, cu
);
13513 /* If this type has an underlying type that is not a stub, then we
13514 may use its attributes. We always use the "unsigned" attribute
13515 in this situation, because ordinarily we guess whether the type
13516 is unsigned -- but the guess can be wrong and the underlying type
13517 can tell us the reality. However, we defer to a local size
13518 attribute if one exists, because this lets the compiler override
13519 the underlying type if needed. */
13520 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13522 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13523 if (TYPE_LENGTH (type
) == 0)
13524 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13527 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13529 return set_die_type (die
, type
, cu
);
13532 /* Given a pointer to a die which begins an enumeration, process all
13533 the dies that define the members of the enumeration, and create the
13534 symbol for the enumeration type.
13536 NOTE: We reverse the order of the element list. */
13539 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13541 struct type
*this_type
;
13543 this_type
= get_die_type (die
, cu
);
13544 if (this_type
== NULL
)
13545 this_type
= read_enumeration_type (die
, cu
);
13547 if (die
->child
!= NULL
)
13549 struct die_info
*child_die
;
13550 struct symbol
*sym
;
13551 struct field
*fields
= NULL
;
13552 int num_fields
= 0;
13555 child_die
= die
->child
;
13556 while (child_die
&& child_die
->tag
)
13558 if (child_die
->tag
!= DW_TAG_enumerator
)
13560 process_die (child_die
, cu
);
13564 name
= dwarf2_name (child_die
, cu
);
13567 sym
= new_symbol (child_die
, this_type
, cu
);
13569 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13571 fields
= (struct field
*)
13573 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13574 * sizeof (struct field
));
13577 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13578 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13579 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13580 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13586 child_die
= sibling_die (child_die
);
13591 TYPE_NFIELDS (this_type
) = num_fields
;
13592 TYPE_FIELDS (this_type
) = (struct field
*)
13593 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13594 memcpy (TYPE_FIELDS (this_type
), fields
,
13595 sizeof (struct field
) * num_fields
);
13600 /* If we are reading an enum from a .debug_types unit, and the enum
13601 is a declaration, and the enum is not the signatured type in the
13602 unit, then we do not want to add a symbol for it. Adding a
13603 symbol would in some cases obscure the true definition of the
13604 enum, giving users an incomplete type when the definition is
13605 actually available. Note that we do not want to do this for all
13606 enums which are just declarations, because C++0x allows forward
13607 enum declarations. */
13608 if (cu
->per_cu
->is_debug_types
13609 && die_is_declaration (die
, cu
))
13611 struct signatured_type
*sig_type
;
13613 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13614 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13615 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13619 new_symbol (die
, this_type
, cu
);
13622 /* Extract all information from a DW_TAG_array_type DIE and put it in
13623 the DIE's type field. For now, this only handles one dimensional
13626 static struct type
*
13627 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13629 struct objfile
*objfile
= cu
->objfile
;
13630 struct die_info
*child_die
;
13632 struct type
*element_type
, *range_type
, *index_type
;
13633 struct type
**range_types
= NULL
;
13634 struct attribute
*attr
;
13636 struct cleanup
*back_to
;
13638 unsigned int bit_stride
= 0;
13640 element_type
= die_type (die
, cu
);
13642 /* The die_type call above may have already set the type for this DIE. */
13643 type
= get_die_type (die
, cu
);
13647 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13649 bit_stride
= DW_UNSND (attr
) * 8;
13651 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13653 bit_stride
= DW_UNSND (attr
);
13655 /* Irix 6.2 native cc creates array types without children for
13656 arrays with unspecified length. */
13657 if (die
->child
== NULL
)
13659 index_type
= objfile_type (objfile
)->builtin_int
;
13660 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13661 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13663 return set_die_type (die
, type
, cu
);
13666 back_to
= make_cleanup (null_cleanup
, NULL
);
13667 child_die
= die
->child
;
13668 while (child_die
&& child_die
->tag
)
13670 if (child_die
->tag
== DW_TAG_subrange_type
)
13672 struct type
*child_type
= read_type_die (child_die
, cu
);
13674 if (child_type
!= NULL
)
13676 /* The range type was succesfully read. Save it for the
13677 array type creation. */
13678 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13680 range_types
= (struct type
**)
13681 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13682 * sizeof (struct type
*));
13684 make_cleanup (free_current_contents
, &range_types
);
13686 range_types
[ndim
++] = child_type
;
13689 child_die
= sibling_die (child_die
);
13692 /* Dwarf2 dimensions are output from left to right, create the
13693 necessary array types in backwards order. */
13695 type
= element_type
;
13697 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13702 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13708 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13712 /* Understand Dwarf2 support for vector types (like they occur on
13713 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13714 array type. This is not part of the Dwarf2/3 standard yet, but a
13715 custom vendor extension. The main difference between a regular
13716 array and the vector variant is that vectors are passed by value
13718 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13720 make_vector_type (type
);
13722 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13723 implementation may choose to implement triple vectors using this
13725 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13728 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13729 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13731 complaint (&symfile_complaints
,
13732 _("DW_AT_byte_size for array type smaller "
13733 "than the total size of elements"));
13736 name
= dwarf2_name (die
, cu
);
13738 TYPE_NAME (type
) = name
;
13740 /* Install the type in the die. */
13741 set_die_type (die
, type
, cu
);
13743 /* set_die_type should be already done. */
13744 set_descriptive_type (type
, die
, cu
);
13746 do_cleanups (back_to
);
13751 static enum dwarf_array_dim_ordering
13752 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13754 struct attribute
*attr
;
13756 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13758 if (attr
) return DW_SND (attr
);
13760 /* GNU F77 is a special case, as at 08/2004 array type info is the
13761 opposite order to the dwarf2 specification, but data is still
13762 laid out as per normal fortran.
13764 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13765 version checking. */
13767 if (cu
->language
== language_fortran
13768 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13770 return DW_ORD_row_major
;
13773 switch (cu
->language_defn
->la_array_ordering
)
13775 case array_column_major
:
13776 return DW_ORD_col_major
;
13777 case array_row_major
:
13779 return DW_ORD_row_major
;
13783 /* Extract all information from a DW_TAG_set_type DIE and put it in
13784 the DIE's type field. */
13786 static struct type
*
13787 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13789 struct type
*domain_type
, *set_type
;
13790 struct attribute
*attr
;
13792 domain_type
= die_type (die
, cu
);
13794 /* The die_type call above may have already set the type for this DIE. */
13795 set_type
= get_die_type (die
, cu
);
13799 set_type
= create_set_type (NULL
, domain_type
);
13801 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13803 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13805 return set_die_type (die
, set_type
, cu
);
13808 /* A helper for read_common_block that creates a locexpr baton.
13809 SYM is the symbol which we are marking as computed.
13810 COMMON_DIE is the DIE for the common block.
13811 COMMON_LOC is the location expression attribute for the common
13813 MEMBER_LOC is the location expression attribute for the particular
13814 member of the common block that we are processing.
13815 CU is the CU from which the above come. */
13818 mark_common_block_symbol_computed (struct symbol
*sym
,
13819 struct die_info
*common_die
,
13820 struct attribute
*common_loc
,
13821 struct attribute
*member_loc
,
13822 struct dwarf2_cu
*cu
)
13824 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13825 struct dwarf2_locexpr_baton
*baton
;
13827 unsigned int cu_off
;
13828 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13829 LONGEST offset
= 0;
13831 gdb_assert (common_loc
&& member_loc
);
13832 gdb_assert (attr_form_is_block (common_loc
));
13833 gdb_assert (attr_form_is_block (member_loc
)
13834 || attr_form_is_constant (member_loc
));
13836 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13837 sizeof (struct dwarf2_locexpr_baton
));
13838 baton
->per_cu
= cu
->per_cu
;
13839 gdb_assert (baton
->per_cu
);
13841 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13843 if (attr_form_is_constant (member_loc
))
13845 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13846 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13849 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13851 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13854 *ptr
++ = DW_OP_call4
;
13855 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13856 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13859 if (attr_form_is_constant (member_loc
))
13861 *ptr
++ = DW_OP_addr
;
13862 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13863 ptr
+= cu
->header
.addr_size
;
13867 /* We have to copy the data here, because DW_OP_call4 will only
13868 use a DW_AT_location attribute. */
13869 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13870 ptr
+= DW_BLOCK (member_loc
)->size
;
13873 *ptr
++ = DW_OP_plus
;
13874 gdb_assert (ptr
- baton
->data
== baton
->size
);
13876 SYMBOL_LOCATION_BATON (sym
) = baton
;
13877 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13880 /* Create appropriate locally-scoped variables for all the
13881 DW_TAG_common_block entries. Also create a struct common_block
13882 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13883 is used to sepate the common blocks name namespace from regular
13887 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13889 struct attribute
*attr
;
13891 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13894 /* Support the .debug_loc offsets. */
13895 if (attr_form_is_block (attr
))
13899 else if (attr_form_is_section_offset (attr
))
13901 dwarf2_complex_location_expr_complaint ();
13906 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13907 "common block member");
13912 if (die
->child
!= NULL
)
13914 struct objfile
*objfile
= cu
->objfile
;
13915 struct die_info
*child_die
;
13916 size_t n_entries
= 0, size
;
13917 struct common_block
*common_block
;
13918 struct symbol
*sym
;
13920 for (child_die
= die
->child
;
13921 child_die
&& child_die
->tag
;
13922 child_die
= sibling_die (child_die
))
13925 size
= (sizeof (struct common_block
)
13926 + (n_entries
- 1) * sizeof (struct symbol
*));
13927 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13928 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13929 common_block
->n_entries
= 0;
13931 for (child_die
= die
->child
;
13932 child_die
&& child_die
->tag
;
13933 child_die
= sibling_die (child_die
))
13935 /* Create the symbol in the DW_TAG_common_block block in the current
13937 sym
= new_symbol (child_die
, NULL
, cu
);
13940 struct attribute
*member_loc
;
13942 common_block
->contents
[common_block
->n_entries
++] = sym
;
13944 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13948 /* GDB has handled this for a long time, but it is
13949 not specified by DWARF. It seems to have been
13950 emitted by gfortran at least as recently as:
13951 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13952 complaint (&symfile_complaints
,
13953 _("Variable in common block has "
13954 "DW_AT_data_member_location "
13955 "- DIE at 0x%x [in module %s]"),
13956 child_die
->offset
.sect_off
,
13957 objfile_name (cu
->objfile
));
13959 if (attr_form_is_section_offset (member_loc
))
13960 dwarf2_complex_location_expr_complaint ();
13961 else if (attr_form_is_constant (member_loc
)
13962 || attr_form_is_block (member_loc
))
13965 mark_common_block_symbol_computed (sym
, die
, attr
,
13969 dwarf2_complex_location_expr_complaint ();
13974 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
13975 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
13979 /* Create a type for a C++ namespace. */
13981 static struct type
*
13982 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13984 struct objfile
*objfile
= cu
->objfile
;
13985 const char *previous_prefix
, *name
;
13989 /* For extensions, reuse the type of the original namespace. */
13990 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
13992 struct die_info
*ext_die
;
13993 struct dwarf2_cu
*ext_cu
= cu
;
13995 ext_die
= dwarf2_extension (die
, &ext_cu
);
13996 type
= read_type_die (ext_die
, ext_cu
);
13998 /* EXT_CU may not be the same as CU.
13999 Ensure TYPE is recorded with CU in die_type_hash. */
14000 return set_die_type (die
, type
, cu
);
14003 name
= namespace_name (die
, &is_anonymous
, cu
);
14005 /* Now build the name of the current namespace. */
14007 previous_prefix
= determine_prefix (die
, cu
);
14008 if (previous_prefix
[0] != '\0')
14009 name
= typename_concat (&objfile
->objfile_obstack
,
14010 previous_prefix
, name
, 0, cu
);
14012 /* Create the type. */
14013 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14015 TYPE_NAME (type
) = name
;
14016 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14018 return set_die_type (die
, type
, cu
);
14021 /* Read a C++ namespace. */
14024 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14026 struct objfile
*objfile
= cu
->objfile
;
14029 /* Add a symbol associated to this if we haven't seen the namespace
14030 before. Also, add a using directive if it's an anonymous
14033 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14037 type
= read_type_die (die
, cu
);
14038 new_symbol (die
, type
, cu
);
14040 namespace_name (die
, &is_anonymous
, cu
);
14043 const char *previous_prefix
= determine_prefix (die
, cu
);
14045 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
14046 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14050 if (die
->child
!= NULL
)
14052 struct die_info
*child_die
= die
->child
;
14054 while (child_die
&& child_die
->tag
)
14056 process_die (child_die
, cu
);
14057 child_die
= sibling_die (child_die
);
14062 /* Read a Fortran module as type. This DIE can be only a declaration used for
14063 imported module. Still we need that type as local Fortran "use ... only"
14064 declaration imports depend on the created type in determine_prefix. */
14066 static struct type
*
14067 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14069 struct objfile
*objfile
= cu
->objfile
;
14070 const char *module_name
;
14073 module_name
= dwarf2_name (die
, cu
);
14075 complaint (&symfile_complaints
,
14076 _("DW_TAG_module has no name, offset 0x%x"),
14077 die
->offset
.sect_off
);
14078 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14080 /* determine_prefix uses TYPE_TAG_NAME. */
14081 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14083 return set_die_type (die
, type
, cu
);
14086 /* Read a Fortran module. */
14089 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14091 struct die_info
*child_die
= die
->child
;
14094 type
= read_type_die (die
, cu
);
14095 new_symbol (die
, type
, cu
);
14097 while (child_die
&& child_die
->tag
)
14099 process_die (child_die
, cu
);
14100 child_die
= sibling_die (child_die
);
14104 /* Return the name of the namespace represented by DIE. Set
14105 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14108 static const char *
14109 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14111 struct die_info
*current_die
;
14112 const char *name
= NULL
;
14114 /* Loop through the extensions until we find a name. */
14116 for (current_die
= die
;
14117 current_die
!= NULL
;
14118 current_die
= dwarf2_extension (die
, &cu
))
14120 /* We don't use dwarf2_name here so that we can detect the absence
14121 of a name -> anonymous namespace. */
14122 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14125 name
= DW_STRING (attr
);
14130 /* Is it an anonymous namespace? */
14132 *is_anonymous
= (name
== NULL
);
14134 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14139 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14140 the user defined type vector. */
14142 static struct type
*
14143 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14145 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14146 struct comp_unit_head
*cu_header
= &cu
->header
;
14148 struct attribute
*attr_byte_size
;
14149 struct attribute
*attr_address_class
;
14150 int byte_size
, addr_class
;
14151 struct type
*target_type
;
14153 target_type
= die_type (die
, cu
);
14155 /* The die_type call above may have already set the type for this DIE. */
14156 type
= get_die_type (die
, cu
);
14160 type
= lookup_pointer_type (target_type
);
14162 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14163 if (attr_byte_size
)
14164 byte_size
= DW_UNSND (attr_byte_size
);
14166 byte_size
= cu_header
->addr_size
;
14168 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14169 if (attr_address_class
)
14170 addr_class
= DW_UNSND (attr_address_class
);
14172 addr_class
= DW_ADDR_none
;
14174 /* If the pointer size or address class is different than the
14175 default, create a type variant marked as such and set the
14176 length accordingly. */
14177 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14179 if (gdbarch_address_class_type_flags_p (gdbarch
))
14183 type_flags
= gdbarch_address_class_type_flags
14184 (gdbarch
, byte_size
, addr_class
);
14185 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14187 type
= make_type_with_address_space (type
, type_flags
);
14189 else if (TYPE_LENGTH (type
) != byte_size
)
14191 complaint (&symfile_complaints
,
14192 _("invalid pointer size %d"), byte_size
);
14196 /* Should we also complain about unhandled address classes? */
14200 TYPE_LENGTH (type
) = byte_size
;
14201 return set_die_type (die
, type
, cu
);
14204 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14205 the user defined type vector. */
14207 static struct type
*
14208 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14211 struct type
*to_type
;
14212 struct type
*domain
;
14214 to_type
= die_type (die
, cu
);
14215 domain
= die_containing_type (die
, cu
);
14217 /* The calls above may have already set the type for this DIE. */
14218 type
= get_die_type (die
, cu
);
14222 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14223 type
= lookup_methodptr_type (to_type
);
14224 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14226 struct type
*new_type
= alloc_type (cu
->objfile
);
14228 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14229 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14230 TYPE_VARARGS (to_type
));
14231 type
= lookup_methodptr_type (new_type
);
14234 type
= lookup_memberptr_type (to_type
, domain
);
14236 return set_die_type (die
, type
, cu
);
14239 /* Extract all information from a DW_TAG_reference_type DIE and add to
14240 the user defined type vector. */
14242 static struct type
*
14243 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14245 struct comp_unit_head
*cu_header
= &cu
->header
;
14246 struct type
*type
, *target_type
;
14247 struct attribute
*attr
;
14249 target_type
= die_type (die
, cu
);
14251 /* The die_type call above may have already set the type for this DIE. */
14252 type
= get_die_type (die
, cu
);
14256 type
= lookup_reference_type (target_type
);
14257 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14260 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14264 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14266 return set_die_type (die
, type
, cu
);
14269 /* Add the given cv-qualifiers to the element type of the array. GCC
14270 outputs DWARF type qualifiers that apply to an array, not the
14271 element type. But GDB relies on the array element type to carry
14272 the cv-qualifiers. This mimics section 6.7.3 of the C99
14275 static struct type
*
14276 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14277 struct type
*base_type
, int cnst
, int voltl
)
14279 struct type
*el_type
, *inner_array
;
14281 base_type
= copy_type (base_type
);
14282 inner_array
= base_type
;
14284 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14286 TYPE_TARGET_TYPE (inner_array
) =
14287 copy_type (TYPE_TARGET_TYPE (inner_array
));
14288 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14291 el_type
= TYPE_TARGET_TYPE (inner_array
);
14292 cnst
|= TYPE_CONST (el_type
);
14293 voltl
|= TYPE_VOLATILE (el_type
);
14294 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14296 return set_die_type (die
, base_type
, cu
);
14299 static struct type
*
14300 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14302 struct type
*base_type
, *cv_type
;
14304 base_type
= die_type (die
, cu
);
14306 /* The die_type call above may have already set the type for this DIE. */
14307 cv_type
= get_die_type (die
, cu
);
14311 /* In case the const qualifier is applied to an array type, the element type
14312 is so qualified, not the array type (section 6.7.3 of C99). */
14313 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14314 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14316 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14317 return set_die_type (die
, cv_type
, cu
);
14320 static struct type
*
14321 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14323 struct type
*base_type
, *cv_type
;
14325 base_type
= die_type (die
, cu
);
14327 /* The die_type call above may have already set the type for this DIE. */
14328 cv_type
= get_die_type (die
, cu
);
14332 /* In case the volatile qualifier is applied to an array type, the
14333 element type is so qualified, not the array type (section 6.7.3
14335 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14336 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14338 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14339 return set_die_type (die
, cv_type
, cu
);
14342 /* Handle DW_TAG_restrict_type. */
14344 static struct type
*
14345 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14347 struct type
*base_type
, *cv_type
;
14349 base_type
= die_type (die
, cu
);
14351 /* The die_type call above may have already set the type for this DIE. */
14352 cv_type
= get_die_type (die
, cu
);
14356 cv_type
= make_restrict_type (base_type
);
14357 return set_die_type (die
, cv_type
, cu
);
14360 /* Handle DW_TAG_atomic_type. */
14362 static struct type
*
14363 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14365 struct type
*base_type
, *cv_type
;
14367 base_type
= die_type (die
, cu
);
14369 /* The die_type call above may have already set the type for this DIE. */
14370 cv_type
= get_die_type (die
, cu
);
14374 cv_type
= make_atomic_type (base_type
);
14375 return set_die_type (die
, cv_type
, cu
);
14378 /* Extract all information from a DW_TAG_string_type DIE and add to
14379 the user defined type vector. It isn't really a user defined type,
14380 but it behaves like one, with other DIE's using an AT_user_def_type
14381 attribute to reference it. */
14383 static struct type
*
14384 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14386 struct objfile
*objfile
= cu
->objfile
;
14387 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14388 struct type
*type
, *range_type
, *index_type
, *char_type
;
14389 struct attribute
*attr
;
14390 unsigned int length
;
14392 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14395 length
= DW_UNSND (attr
);
14399 /* Check for the DW_AT_byte_size attribute. */
14400 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14403 length
= DW_UNSND (attr
);
14411 index_type
= objfile_type (objfile
)->builtin_int
;
14412 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14413 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14414 type
= create_string_type (NULL
, char_type
, range_type
);
14416 return set_die_type (die
, type
, cu
);
14419 /* Assuming that DIE corresponds to a function, returns nonzero
14420 if the function is prototyped. */
14423 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14425 struct attribute
*attr
;
14427 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14428 if (attr
&& (DW_UNSND (attr
) != 0))
14431 /* The DWARF standard implies that the DW_AT_prototyped attribute
14432 is only meaninful for C, but the concept also extends to other
14433 languages that allow unprototyped functions (Eg: Objective C).
14434 For all other languages, assume that functions are always
14436 if (cu
->language
!= language_c
14437 && cu
->language
!= language_objc
14438 && cu
->language
!= language_opencl
)
14441 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14442 prototyped and unprototyped functions; default to prototyped,
14443 since that is more common in modern code (and RealView warns
14444 about unprototyped functions). */
14445 if (producer_is_realview (cu
->producer
))
14451 /* Handle DIES due to C code like:
14455 int (*funcp)(int a, long l);
14459 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14461 static struct type
*
14462 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14464 struct objfile
*objfile
= cu
->objfile
;
14465 struct type
*type
; /* Type that this function returns. */
14466 struct type
*ftype
; /* Function that returns above type. */
14467 struct attribute
*attr
;
14469 type
= die_type (die
, cu
);
14471 /* The die_type call above may have already set the type for this DIE. */
14472 ftype
= get_die_type (die
, cu
);
14476 ftype
= lookup_function_type (type
);
14478 if (prototyped_function_p (die
, cu
))
14479 TYPE_PROTOTYPED (ftype
) = 1;
14481 /* Store the calling convention in the type if it's available in
14482 the subroutine die. Otherwise set the calling convention to
14483 the default value DW_CC_normal. */
14484 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14486 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14487 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14488 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14490 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14492 /* Record whether the function returns normally to its caller or not
14493 if the DWARF producer set that information. */
14494 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14495 if (attr
&& (DW_UNSND (attr
) != 0))
14496 TYPE_NO_RETURN (ftype
) = 1;
14498 /* We need to add the subroutine type to the die immediately so
14499 we don't infinitely recurse when dealing with parameters
14500 declared as the same subroutine type. */
14501 set_die_type (die
, ftype
, cu
);
14503 if (die
->child
!= NULL
)
14505 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14506 struct die_info
*child_die
;
14507 int nparams
, iparams
;
14509 /* Count the number of parameters.
14510 FIXME: GDB currently ignores vararg functions, but knows about
14511 vararg member functions. */
14513 child_die
= die
->child
;
14514 while (child_die
&& child_die
->tag
)
14516 if (child_die
->tag
== DW_TAG_formal_parameter
)
14518 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14519 TYPE_VARARGS (ftype
) = 1;
14520 child_die
= sibling_die (child_die
);
14523 /* Allocate storage for parameters and fill them in. */
14524 TYPE_NFIELDS (ftype
) = nparams
;
14525 TYPE_FIELDS (ftype
) = (struct field
*)
14526 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14528 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14529 even if we error out during the parameters reading below. */
14530 for (iparams
= 0; iparams
< nparams
; iparams
++)
14531 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14534 child_die
= die
->child
;
14535 while (child_die
&& child_die
->tag
)
14537 if (child_die
->tag
== DW_TAG_formal_parameter
)
14539 struct type
*arg_type
;
14541 /* DWARF version 2 has no clean way to discern C++
14542 static and non-static member functions. G++ helps
14543 GDB by marking the first parameter for non-static
14544 member functions (which is the this pointer) as
14545 artificial. We pass this information to
14546 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14548 DWARF version 3 added DW_AT_object_pointer, which GCC
14549 4.5 does not yet generate. */
14550 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14552 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14555 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14557 /* GCC/43521: In java, the formal parameter
14558 "this" is sometimes not marked with DW_AT_artificial. */
14559 if (cu
->language
== language_java
)
14561 const char *name
= dwarf2_name (child_die
, cu
);
14563 if (name
&& !strcmp (name
, "this"))
14564 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14567 arg_type
= die_type (child_die
, cu
);
14569 /* RealView does not mark THIS as const, which the testsuite
14570 expects. GCC marks THIS as const in method definitions,
14571 but not in the class specifications (GCC PR 43053). */
14572 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14573 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14576 struct dwarf2_cu
*arg_cu
= cu
;
14577 const char *name
= dwarf2_name (child_die
, cu
);
14579 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14582 /* If the compiler emits this, use it. */
14583 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14586 else if (name
&& strcmp (name
, "this") == 0)
14587 /* Function definitions will have the argument names. */
14589 else if (name
== NULL
&& iparams
== 0)
14590 /* Declarations may not have the names, so like
14591 elsewhere in GDB, assume an artificial first
14592 argument is "this". */
14596 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14600 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14603 child_die
= sibling_die (child_die
);
14610 static struct type
*
14611 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14613 struct objfile
*objfile
= cu
->objfile
;
14614 const char *name
= NULL
;
14615 struct type
*this_type
, *target_type
;
14617 name
= dwarf2_full_name (NULL
, die
, cu
);
14618 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14619 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14620 TYPE_NAME (this_type
) = name
;
14621 set_die_type (die
, this_type
, cu
);
14622 target_type
= die_type (die
, cu
);
14623 if (target_type
!= this_type
)
14624 TYPE_TARGET_TYPE (this_type
) = target_type
;
14627 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14628 spec and cause infinite loops in GDB. */
14629 complaint (&symfile_complaints
,
14630 _("Self-referential DW_TAG_typedef "
14631 "- DIE at 0x%x [in module %s]"),
14632 die
->offset
.sect_off
, objfile_name (objfile
));
14633 TYPE_TARGET_TYPE (this_type
) = NULL
;
14638 /* Find a representation of a given base type and install
14639 it in the TYPE field of the die. */
14641 static struct type
*
14642 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14644 struct objfile
*objfile
= cu
->objfile
;
14646 struct attribute
*attr
;
14647 int encoding
= 0, size
= 0;
14649 enum type_code code
= TYPE_CODE_INT
;
14650 int type_flags
= 0;
14651 struct type
*target_type
= NULL
;
14653 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14656 encoding
= DW_UNSND (attr
);
14658 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14661 size
= DW_UNSND (attr
);
14663 name
= dwarf2_name (die
, cu
);
14666 complaint (&symfile_complaints
,
14667 _("DW_AT_name missing from DW_TAG_base_type"));
14672 case DW_ATE_address
:
14673 /* Turn DW_ATE_address into a void * pointer. */
14674 code
= TYPE_CODE_PTR
;
14675 type_flags
|= TYPE_FLAG_UNSIGNED
;
14676 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14678 case DW_ATE_boolean
:
14679 code
= TYPE_CODE_BOOL
;
14680 type_flags
|= TYPE_FLAG_UNSIGNED
;
14682 case DW_ATE_complex_float
:
14683 code
= TYPE_CODE_COMPLEX
;
14684 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14686 case DW_ATE_decimal_float
:
14687 code
= TYPE_CODE_DECFLOAT
;
14690 code
= TYPE_CODE_FLT
;
14692 case DW_ATE_signed
:
14694 case DW_ATE_unsigned
:
14695 type_flags
|= TYPE_FLAG_UNSIGNED
;
14696 if (cu
->language
== language_fortran
14698 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
14699 code
= TYPE_CODE_CHAR
;
14701 case DW_ATE_signed_char
:
14702 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14703 || cu
->language
== language_pascal
14704 || cu
->language
== language_fortran
)
14705 code
= TYPE_CODE_CHAR
;
14707 case DW_ATE_unsigned_char
:
14708 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14709 || cu
->language
== language_pascal
14710 || cu
->language
== language_fortran
)
14711 code
= TYPE_CODE_CHAR
;
14712 type_flags
|= TYPE_FLAG_UNSIGNED
;
14715 /* We just treat this as an integer and then recognize the
14716 type by name elsewhere. */
14720 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14721 dwarf_type_encoding_name (encoding
));
14725 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14726 TYPE_NAME (type
) = name
;
14727 TYPE_TARGET_TYPE (type
) = target_type
;
14729 if (name
&& strcmp (name
, "char") == 0)
14730 TYPE_NOSIGN (type
) = 1;
14732 return set_die_type (die
, type
, cu
);
14735 /* Parse dwarf attribute if it's a block, reference or constant and put the
14736 resulting value of the attribute into struct bound_prop.
14737 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14740 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14741 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14743 struct dwarf2_property_baton
*baton
;
14744 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14746 if (attr
== NULL
|| prop
== NULL
)
14749 if (attr_form_is_block (attr
))
14751 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14752 baton
->referenced_type
= NULL
;
14753 baton
->locexpr
.per_cu
= cu
->per_cu
;
14754 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14755 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14756 prop
->data
.baton
= baton
;
14757 prop
->kind
= PROP_LOCEXPR
;
14758 gdb_assert (prop
->data
.baton
!= NULL
);
14760 else if (attr_form_is_ref (attr
))
14762 struct dwarf2_cu
*target_cu
= cu
;
14763 struct die_info
*target_die
;
14764 struct attribute
*target_attr
;
14766 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14767 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14768 if (target_attr
== NULL
)
14769 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14771 if (target_attr
== NULL
)
14774 switch (target_attr
->name
)
14776 case DW_AT_location
:
14777 if (attr_form_is_section_offset (target_attr
))
14779 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14780 baton
->referenced_type
= die_type (target_die
, target_cu
);
14781 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14782 prop
->data
.baton
= baton
;
14783 prop
->kind
= PROP_LOCLIST
;
14784 gdb_assert (prop
->data
.baton
!= NULL
);
14786 else if (attr_form_is_block (target_attr
))
14788 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14789 baton
->referenced_type
= die_type (target_die
, target_cu
);
14790 baton
->locexpr
.per_cu
= cu
->per_cu
;
14791 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14792 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14793 prop
->data
.baton
= baton
;
14794 prop
->kind
= PROP_LOCEXPR
;
14795 gdb_assert (prop
->data
.baton
!= NULL
);
14799 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14800 "dynamic property");
14804 case DW_AT_data_member_location
:
14808 if (!handle_data_member_location (target_die
, target_cu
,
14812 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14813 baton
->referenced_type
= get_die_type (target_die
->parent
,
14815 baton
->offset_info
.offset
= offset
;
14816 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14817 prop
->data
.baton
= baton
;
14818 prop
->kind
= PROP_ADDR_OFFSET
;
14823 else if (attr_form_is_constant (attr
))
14825 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14826 prop
->kind
= PROP_CONST
;
14830 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14831 dwarf2_name (die
, cu
));
14838 /* Read the given DW_AT_subrange DIE. */
14840 static struct type
*
14841 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14843 struct type
*base_type
, *orig_base_type
;
14844 struct type
*range_type
;
14845 struct attribute
*attr
;
14846 struct dynamic_prop low
, high
;
14847 int low_default_is_valid
;
14848 int high_bound_is_count
= 0;
14850 LONGEST negative_mask
;
14852 orig_base_type
= die_type (die
, cu
);
14853 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14854 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14855 creating the range type, but we use the result of check_typedef
14856 when examining properties of the type. */
14857 base_type
= check_typedef (orig_base_type
);
14859 /* The die_type call above may have already set the type for this DIE. */
14860 range_type
= get_die_type (die
, cu
);
14864 low
.kind
= PROP_CONST
;
14865 high
.kind
= PROP_CONST
;
14866 high
.data
.const_val
= 0;
14868 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14869 omitting DW_AT_lower_bound. */
14870 switch (cu
->language
)
14873 case language_cplus
:
14874 low
.data
.const_val
= 0;
14875 low_default_is_valid
= 1;
14877 case language_fortran
:
14878 low
.data
.const_val
= 1;
14879 low_default_is_valid
= 1;
14882 case language_java
:
14883 case language_objc
:
14884 low
.data
.const_val
= 0;
14885 low_default_is_valid
= (cu
->header
.version
>= 4);
14889 case language_pascal
:
14890 low
.data
.const_val
= 1;
14891 low_default_is_valid
= (cu
->header
.version
>= 4);
14894 low
.data
.const_val
= 0;
14895 low_default_is_valid
= 0;
14899 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14901 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14902 else if (!low_default_is_valid
)
14903 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14904 "- DIE at 0x%x [in module %s]"),
14905 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14907 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14908 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14910 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14911 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14913 /* If bounds are constant do the final calculation here. */
14914 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14915 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14917 high_bound_is_count
= 1;
14921 /* Dwarf-2 specifications explicitly allows to create subrange types
14922 without specifying a base type.
14923 In that case, the base type must be set to the type of
14924 the lower bound, upper bound or count, in that order, if any of these
14925 three attributes references an object that has a type.
14926 If no base type is found, the Dwarf-2 specifications say that
14927 a signed integer type of size equal to the size of an address should
14929 For the following C code: `extern char gdb_int [];'
14930 GCC produces an empty range DIE.
14931 FIXME: muller/2010-05-28: Possible references to object for low bound,
14932 high bound or count are not yet handled by this code. */
14933 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14935 struct objfile
*objfile
= cu
->objfile
;
14936 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14937 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14938 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14940 /* Test "int", "long int", and "long long int" objfile types,
14941 and select the first one having a size above or equal to the
14942 architecture address size. */
14943 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14944 base_type
= int_type
;
14947 int_type
= objfile_type (objfile
)->builtin_long
;
14948 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14949 base_type
= int_type
;
14952 int_type
= objfile_type (objfile
)->builtin_long_long
;
14953 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14954 base_type
= int_type
;
14959 /* Normally, the DWARF producers are expected to use a signed
14960 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14961 But this is unfortunately not always the case, as witnessed
14962 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14963 is used instead. To work around that ambiguity, we treat
14964 the bounds as signed, and thus sign-extend their values, when
14965 the base type is signed. */
14967 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
14968 if (low
.kind
== PROP_CONST
14969 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
14970 low
.data
.const_val
|= negative_mask
;
14971 if (high
.kind
== PROP_CONST
14972 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
14973 high
.data
.const_val
|= negative_mask
;
14975 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
14977 if (high_bound_is_count
)
14978 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
14980 /* Ada expects an empty array on no boundary attributes. */
14981 if (attr
== NULL
&& cu
->language
!= language_ada
)
14982 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
14984 name
= dwarf2_name (die
, cu
);
14986 TYPE_NAME (range_type
) = name
;
14988 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14990 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
14992 set_die_type (die
, range_type
, cu
);
14994 /* set_die_type should be already done. */
14995 set_descriptive_type (range_type
, die
, cu
);
15000 static struct type
*
15001 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15005 /* For now, we only support the C meaning of an unspecified type: void. */
15007 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15008 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15010 return set_die_type (die
, type
, cu
);
15013 /* Read a single die and all its descendents. Set the die's sibling
15014 field to NULL; set other fields in the die correctly, and set all
15015 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15016 location of the info_ptr after reading all of those dies. PARENT
15017 is the parent of the die in question. */
15019 static struct die_info
*
15020 read_die_and_children (const struct die_reader_specs
*reader
,
15021 const gdb_byte
*info_ptr
,
15022 const gdb_byte
**new_info_ptr
,
15023 struct die_info
*parent
)
15025 struct die_info
*die
;
15026 const gdb_byte
*cur_ptr
;
15029 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15032 *new_info_ptr
= cur_ptr
;
15035 store_in_ref_table (die
, reader
->cu
);
15038 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15042 *new_info_ptr
= cur_ptr
;
15045 die
->sibling
= NULL
;
15046 die
->parent
= parent
;
15050 /* Read a die, all of its descendents, and all of its siblings; set
15051 all of the fields of all of the dies correctly. Arguments are as
15052 in read_die_and_children. */
15054 static struct die_info
*
15055 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15056 const gdb_byte
*info_ptr
,
15057 const gdb_byte
**new_info_ptr
,
15058 struct die_info
*parent
)
15060 struct die_info
*first_die
, *last_sibling
;
15061 const gdb_byte
*cur_ptr
;
15063 cur_ptr
= info_ptr
;
15064 first_die
= last_sibling
= NULL
;
15068 struct die_info
*die
15069 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15073 *new_info_ptr
= cur_ptr
;
15080 last_sibling
->sibling
= die
;
15082 last_sibling
= die
;
15086 /* Read a die, all of its descendents, and all of its siblings; set
15087 all of the fields of all of the dies correctly. Arguments are as
15088 in read_die_and_children.
15089 This the main entry point for reading a DIE and all its children. */
15091 static struct die_info
*
15092 read_die_and_siblings (const struct die_reader_specs
*reader
,
15093 const gdb_byte
*info_ptr
,
15094 const gdb_byte
**new_info_ptr
,
15095 struct die_info
*parent
)
15097 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15098 new_info_ptr
, parent
);
15100 if (dwarf2_die_debug
)
15102 fprintf_unfiltered (gdb_stdlog
,
15103 "Read die from %s@0x%x of %s:\n",
15104 get_section_name (reader
->die_section
),
15105 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15106 bfd_get_filename (reader
->abfd
));
15107 dump_die (die
, dwarf2_die_debug
);
15113 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15115 The caller is responsible for filling in the extra attributes
15116 and updating (*DIEP)->num_attrs.
15117 Set DIEP to point to a newly allocated die with its information,
15118 except for its child, sibling, and parent fields.
15119 Set HAS_CHILDREN to tell whether the die has children or not. */
15121 static const gdb_byte
*
15122 read_full_die_1 (const struct die_reader_specs
*reader
,
15123 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15124 int *has_children
, int num_extra_attrs
)
15126 unsigned int abbrev_number
, bytes_read
, i
;
15127 sect_offset offset
;
15128 struct abbrev_info
*abbrev
;
15129 struct die_info
*die
;
15130 struct dwarf2_cu
*cu
= reader
->cu
;
15131 bfd
*abfd
= reader
->abfd
;
15133 offset
.sect_off
= info_ptr
- reader
->buffer
;
15134 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15135 info_ptr
+= bytes_read
;
15136 if (!abbrev_number
)
15143 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15145 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15147 bfd_get_filename (abfd
));
15149 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15150 die
->offset
= offset
;
15151 die
->tag
= abbrev
->tag
;
15152 die
->abbrev
= abbrev_number
;
15154 /* Make the result usable.
15155 The caller needs to update num_attrs after adding the extra
15157 die
->num_attrs
= abbrev
->num_attrs
;
15159 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15160 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15164 *has_children
= abbrev
->has_children
;
15168 /* Read a die and all its attributes.
15169 Set DIEP to point to a newly allocated die with its information,
15170 except for its child, sibling, and parent fields.
15171 Set HAS_CHILDREN to tell whether the die has children or not. */
15173 static const gdb_byte
*
15174 read_full_die (const struct die_reader_specs
*reader
,
15175 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15178 const gdb_byte
*result
;
15180 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15182 if (dwarf2_die_debug
)
15184 fprintf_unfiltered (gdb_stdlog
,
15185 "Read die from %s@0x%x of %s:\n",
15186 get_section_name (reader
->die_section
),
15187 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15188 bfd_get_filename (reader
->abfd
));
15189 dump_die (*diep
, dwarf2_die_debug
);
15195 /* Abbreviation tables.
15197 In DWARF version 2, the description of the debugging information is
15198 stored in a separate .debug_abbrev section. Before we read any
15199 dies from a section we read in all abbreviations and install them
15200 in a hash table. */
15202 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15204 static struct abbrev_info
*
15205 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15207 struct abbrev_info
*abbrev
;
15209 abbrev
= (struct abbrev_info
*)
15210 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15211 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15215 /* Add an abbreviation to the table. */
15218 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15219 unsigned int abbrev_number
,
15220 struct abbrev_info
*abbrev
)
15222 unsigned int hash_number
;
15224 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15225 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15226 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15229 /* Look up an abbrev in the table.
15230 Returns NULL if the abbrev is not found. */
15232 static struct abbrev_info
*
15233 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15234 unsigned int abbrev_number
)
15236 unsigned int hash_number
;
15237 struct abbrev_info
*abbrev
;
15239 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15240 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15244 if (abbrev
->number
== abbrev_number
)
15246 abbrev
= abbrev
->next
;
15251 /* Read in an abbrev table. */
15253 static struct abbrev_table
*
15254 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15255 sect_offset offset
)
15257 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15258 bfd
*abfd
= get_section_bfd_owner (section
);
15259 struct abbrev_table
*abbrev_table
;
15260 const gdb_byte
*abbrev_ptr
;
15261 struct abbrev_info
*cur_abbrev
;
15262 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15263 unsigned int abbrev_form
;
15264 struct attr_abbrev
*cur_attrs
;
15265 unsigned int allocated_attrs
;
15267 abbrev_table
= XNEW (struct abbrev_table
);
15268 abbrev_table
->offset
= offset
;
15269 obstack_init (&abbrev_table
->abbrev_obstack
);
15270 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15272 * sizeof (struct abbrev_info
*)));
15273 memset (abbrev_table
->abbrevs
, 0,
15274 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15276 dwarf2_read_section (objfile
, section
);
15277 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15278 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15279 abbrev_ptr
+= bytes_read
;
15281 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15282 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15284 /* Loop until we reach an abbrev number of 0. */
15285 while (abbrev_number
)
15287 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15289 /* read in abbrev header */
15290 cur_abbrev
->number
= abbrev_number
;
15291 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15292 abbrev_ptr
+= bytes_read
;
15293 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15296 /* now read in declarations */
15297 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15298 abbrev_ptr
+= bytes_read
;
15299 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15300 abbrev_ptr
+= bytes_read
;
15301 while (abbrev_name
)
15303 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15305 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15307 = xrealloc (cur_attrs
, (allocated_attrs
15308 * sizeof (struct attr_abbrev
)));
15311 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
15312 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
15313 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15314 abbrev_ptr
+= bytes_read
;
15315 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15316 abbrev_ptr
+= bytes_read
;
15319 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15320 (cur_abbrev
->num_attrs
15321 * sizeof (struct attr_abbrev
)));
15322 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15323 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15325 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15327 /* Get next abbreviation.
15328 Under Irix6 the abbreviations for a compilation unit are not
15329 always properly terminated with an abbrev number of 0.
15330 Exit loop if we encounter an abbreviation which we have
15331 already read (which means we are about to read the abbreviations
15332 for the next compile unit) or if the end of the abbreviation
15333 table is reached. */
15334 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15336 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15337 abbrev_ptr
+= bytes_read
;
15338 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15343 return abbrev_table
;
15346 /* Free the resources held by ABBREV_TABLE. */
15349 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15351 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15352 xfree (abbrev_table
);
15355 /* Same as abbrev_table_free but as a cleanup.
15356 We pass in a pointer to the pointer to the table so that we can
15357 set the pointer to NULL when we're done. It also simplifies
15358 build_type_psymtabs_1. */
15361 abbrev_table_free_cleanup (void *table_ptr
)
15363 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15365 if (*abbrev_table_ptr
!= NULL
)
15366 abbrev_table_free (*abbrev_table_ptr
);
15367 *abbrev_table_ptr
= NULL
;
15370 /* Read the abbrev table for CU from ABBREV_SECTION. */
15373 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15374 struct dwarf2_section_info
*abbrev_section
)
15377 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15380 /* Release the memory used by the abbrev table for a compilation unit. */
15383 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15385 struct dwarf2_cu
*cu
= ptr_to_cu
;
15387 if (cu
->abbrev_table
!= NULL
)
15388 abbrev_table_free (cu
->abbrev_table
);
15389 /* Set this to NULL so that we SEGV if we try to read it later,
15390 and also because free_comp_unit verifies this is NULL. */
15391 cu
->abbrev_table
= NULL
;
15394 /* Returns nonzero if TAG represents a type that we might generate a partial
15398 is_type_tag_for_partial (int tag
)
15403 /* Some types that would be reasonable to generate partial symbols for,
15404 that we don't at present. */
15405 case DW_TAG_array_type
:
15406 case DW_TAG_file_type
:
15407 case DW_TAG_ptr_to_member_type
:
15408 case DW_TAG_set_type
:
15409 case DW_TAG_string_type
:
15410 case DW_TAG_subroutine_type
:
15412 case DW_TAG_base_type
:
15413 case DW_TAG_class_type
:
15414 case DW_TAG_interface_type
:
15415 case DW_TAG_enumeration_type
:
15416 case DW_TAG_structure_type
:
15417 case DW_TAG_subrange_type
:
15418 case DW_TAG_typedef
:
15419 case DW_TAG_union_type
:
15426 /* Load all DIEs that are interesting for partial symbols into memory. */
15428 static struct partial_die_info
*
15429 load_partial_dies (const struct die_reader_specs
*reader
,
15430 const gdb_byte
*info_ptr
, int building_psymtab
)
15432 struct dwarf2_cu
*cu
= reader
->cu
;
15433 struct objfile
*objfile
= cu
->objfile
;
15434 struct partial_die_info
*part_die
;
15435 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15436 struct abbrev_info
*abbrev
;
15437 unsigned int bytes_read
;
15438 unsigned int load_all
= 0;
15439 int nesting_level
= 1;
15444 gdb_assert (cu
->per_cu
!= NULL
);
15445 if (cu
->per_cu
->load_all_dies
)
15449 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15453 &cu
->comp_unit_obstack
,
15454 hashtab_obstack_allocate
,
15455 dummy_obstack_deallocate
);
15457 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15458 sizeof (struct partial_die_info
));
15462 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15464 /* A NULL abbrev means the end of a series of children. */
15465 if (abbrev
== NULL
)
15467 if (--nesting_level
== 0)
15469 /* PART_DIE was probably the last thing allocated on the
15470 comp_unit_obstack, so we could call obstack_free
15471 here. We don't do that because the waste is small,
15472 and will be cleaned up when we're done with this
15473 compilation unit. This way, we're also more robust
15474 against other users of the comp_unit_obstack. */
15477 info_ptr
+= bytes_read
;
15478 last_die
= parent_die
;
15479 parent_die
= parent_die
->die_parent
;
15483 /* Check for template arguments. We never save these; if
15484 they're seen, we just mark the parent, and go on our way. */
15485 if (parent_die
!= NULL
15486 && cu
->language
== language_cplus
15487 && (abbrev
->tag
== DW_TAG_template_type_param
15488 || abbrev
->tag
== DW_TAG_template_value_param
))
15490 parent_die
->has_template_arguments
= 1;
15494 /* We don't need a partial DIE for the template argument. */
15495 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15500 /* We only recurse into c++ subprograms looking for template arguments.
15501 Skip their other children. */
15503 && cu
->language
== language_cplus
15504 && parent_die
!= NULL
15505 && parent_die
->tag
== DW_TAG_subprogram
)
15507 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15511 /* Check whether this DIE is interesting enough to save. Normally
15512 we would not be interested in members here, but there may be
15513 later variables referencing them via DW_AT_specification (for
15514 static members). */
15516 && !is_type_tag_for_partial (abbrev
->tag
)
15517 && abbrev
->tag
!= DW_TAG_constant
15518 && abbrev
->tag
!= DW_TAG_enumerator
15519 && abbrev
->tag
!= DW_TAG_subprogram
15520 && abbrev
->tag
!= DW_TAG_lexical_block
15521 && abbrev
->tag
!= DW_TAG_variable
15522 && abbrev
->tag
!= DW_TAG_namespace
15523 && abbrev
->tag
!= DW_TAG_module
15524 && abbrev
->tag
!= DW_TAG_member
15525 && abbrev
->tag
!= DW_TAG_imported_unit
15526 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15528 /* Otherwise we skip to the next sibling, if any. */
15529 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15533 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15536 /* This two-pass algorithm for processing partial symbols has a
15537 high cost in cache pressure. Thus, handle some simple cases
15538 here which cover the majority of C partial symbols. DIEs
15539 which neither have specification tags in them, nor could have
15540 specification tags elsewhere pointing at them, can simply be
15541 processed and discarded.
15543 This segment is also optional; scan_partial_symbols and
15544 add_partial_symbol will handle these DIEs if we chain
15545 them in normally. When compilers which do not emit large
15546 quantities of duplicate debug information are more common,
15547 this code can probably be removed. */
15549 /* Any complete simple types at the top level (pretty much all
15550 of them, for a language without namespaces), can be processed
15552 if (parent_die
== NULL
15553 && part_die
->has_specification
== 0
15554 && part_die
->is_declaration
== 0
15555 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15556 || part_die
->tag
== DW_TAG_base_type
15557 || part_die
->tag
== DW_TAG_subrange_type
))
15559 if (building_psymtab
&& part_die
->name
!= NULL
)
15560 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15561 VAR_DOMAIN
, LOC_TYPEDEF
,
15562 &objfile
->static_psymbols
,
15563 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15564 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15568 /* The exception for DW_TAG_typedef with has_children above is
15569 a workaround of GCC PR debug/47510. In the case of this complaint
15570 type_name_no_tag_or_error will error on such types later.
15572 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15573 it could not find the child DIEs referenced later, this is checked
15574 above. In correct DWARF DW_TAG_typedef should have no children. */
15576 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15577 complaint (&symfile_complaints
,
15578 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15579 "- DIE at 0x%x [in module %s]"),
15580 part_die
->offset
.sect_off
, objfile_name (objfile
));
15582 /* If we're at the second level, and we're an enumerator, and
15583 our parent has no specification (meaning possibly lives in a
15584 namespace elsewhere), then we can add the partial symbol now
15585 instead of queueing it. */
15586 if (part_die
->tag
== DW_TAG_enumerator
15587 && parent_die
!= NULL
15588 && parent_die
->die_parent
== NULL
15589 && parent_die
->tag
== DW_TAG_enumeration_type
15590 && parent_die
->has_specification
== 0)
15592 if (part_die
->name
== NULL
)
15593 complaint (&symfile_complaints
,
15594 _("malformed enumerator DIE ignored"));
15595 else if (building_psymtab
)
15596 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15597 VAR_DOMAIN
, LOC_CONST
,
15598 (cu
->language
== language_cplus
15599 || cu
->language
== language_java
)
15600 ? &objfile
->global_psymbols
15601 : &objfile
->static_psymbols
,
15602 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15604 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15608 /* We'll save this DIE so link it in. */
15609 part_die
->die_parent
= parent_die
;
15610 part_die
->die_sibling
= NULL
;
15611 part_die
->die_child
= NULL
;
15613 if (last_die
&& last_die
== parent_die
)
15614 last_die
->die_child
= part_die
;
15616 last_die
->die_sibling
= part_die
;
15618 last_die
= part_die
;
15620 if (first_die
== NULL
)
15621 first_die
= part_die
;
15623 /* Maybe add the DIE to the hash table. Not all DIEs that we
15624 find interesting need to be in the hash table, because we
15625 also have the parent/sibling/child chains; only those that we
15626 might refer to by offset later during partial symbol reading.
15628 For now this means things that might have be the target of a
15629 DW_AT_specification, DW_AT_abstract_origin, or
15630 DW_AT_extension. DW_AT_extension will refer only to
15631 namespaces; DW_AT_abstract_origin refers to functions (and
15632 many things under the function DIE, but we do not recurse
15633 into function DIEs during partial symbol reading) and
15634 possibly variables as well; DW_AT_specification refers to
15635 declarations. Declarations ought to have the DW_AT_declaration
15636 flag. It happens that GCC forgets to put it in sometimes, but
15637 only for functions, not for types.
15639 Adding more things than necessary to the hash table is harmless
15640 except for the performance cost. Adding too few will result in
15641 wasted time in find_partial_die, when we reread the compilation
15642 unit with load_all_dies set. */
15645 || abbrev
->tag
== DW_TAG_constant
15646 || abbrev
->tag
== DW_TAG_subprogram
15647 || abbrev
->tag
== DW_TAG_variable
15648 || abbrev
->tag
== DW_TAG_namespace
15649 || part_die
->is_declaration
)
15653 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15654 part_die
->offset
.sect_off
, INSERT
);
15658 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15659 sizeof (struct partial_die_info
));
15661 /* For some DIEs we want to follow their children (if any). For C
15662 we have no reason to follow the children of structures; for other
15663 languages we have to, so that we can get at method physnames
15664 to infer fully qualified class names, for DW_AT_specification,
15665 and for C++ template arguments. For C++, we also look one level
15666 inside functions to find template arguments (if the name of the
15667 function does not already contain the template arguments).
15669 For Ada, we need to scan the children of subprograms and lexical
15670 blocks as well because Ada allows the definition of nested
15671 entities that could be interesting for the debugger, such as
15672 nested subprograms for instance. */
15673 if (last_die
->has_children
15675 || last_die
->tag
== DW_TAG_namespace
15676 || last_die
->tag
== DW_TAG_module
15677 || last_die
->tag
== DW_TAG_enumeration_type
15678 || (cu
->language
== language_cplus
15679 && last_die
->tag
== DW_TAG_subprogram
15680 && (last_die
->name
== NULL
15681 || strchr (last_die
->name
, '<') == NULL
))
15682 || (cu
->language
!= language_c
15683 && (last_die
->tag
== DW_TAG_class_type
15684 || last_die
->tag
== DW_TAG_interface_type
15685 || last_die
->tag
== DW_TAG_structure_type
15686 || last_die
->tag
== DW_TAG_union_type
))
15687 || (cu
->language
== language_ada
15688 && (last_die
->tag
== DW_TAG_subprogram
15689 || last_die
->tag
== DW_TAG_lexical_block
))))
15692 parent_die
= last_die
;
15696 /* Otherwise we skip to the next sibling, if any. */
15697 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15699 /* Back to the top, do it again. */
15703 /* Read a minimal amount of information into the minimal die structure. */
15705 static const gdb_byte
*
15706 read_partial_die (const struct die_reader_specs
*reader
,
15707 struct partial_die_info
*part_die
,
15708 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15709 const gdb_byte
*info_ptr
)
15711 struct dwarf2_cu
*cu
= reader
->cu
;
15712 struct objfile
*objfile
= cu
->objfile
;
15713 const gdb_byte
*buffer
= reader
->buffer
;
15715 struct attribute attr
;
15716 int has_low_pc_attr
= 0;
15717 int has_high_pc_attr
= 0;
15718 int high_pc_relative
= 0;
15720 memset (part_die
, 0, sizeof (struct partial_die_info
));
15722 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15724 info_ptr
+= abbrev_len
;
15726 if (abbrev
== NULL
)
15729 part_die
->tag
= abbrev
->tag
;
15730 part_die
->has_children
= abbrev
->has_children
;
15732 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15734 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15736 /* Store the data if it is of an attribute we want to keep in a
15737 partial symbol table. */
15741 switch (part_die
->tag
)
15743 case DW_TAG_compile_unit
:
15744 case DW_TAG_partial_unit
:
15745 case DW_TAG_type_unit
:
15746 /* Compilation units have a DW_AT_name that is a filename, not
15747 a source language identifier. */
15748 case DW_TAG_enumeration_type
:
15749 case DW_TAG_enumerator
:
15750 /* These tags always have simple identifiers already; no need
15751 to canonicalize them. */
15752 part_die
->name
= DW_STRING (&attr
);
15756 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15757 &objfile
->per_bfd
->storage_obstack
);
15761 case DW_AT_linkage_name
:
15762 case DW_AT_MIPS_linkage_name
:
15763 /* Note that both forms of linkage name might appear. We
15764 assume they will be the same, and we only store the last
15766 if (cu
->language
== language_ada
)
15767 part_die
->name
= DW_STRING (&attr
);
15768 part_die
->linkage_name
= DW_STRING (&attr
);
15771 has_low_pc_attr
= 1;
15772 part_die
->lowpc
= attr_value_as_address (&attr
);
15774 case DW_AT_high_pc
:
15775 has_high_pc_attr
= 1;
15776 part_die
->highpc
= attr_value_as_address (&attr
);
15777 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15778 high_pc_relative
= 1;
15780 case DW_AT_location
:
15781 /* Support the .debug_loc offsets. */
15782 if (attr_form_is_block (&attr
))
15784 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15786 else if (attr_form_is_section_offset (&attr
))
15788 dwarf2_complex_location_expr_complaint ();
15792 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15793 "partial symbol information");
15796 case DW_AT_external
:
15797 part_die
->is_external
= DW_UNSND (&attr
);
15799 case DW_AT_declaration
:
15800 part_die
->is_declaration
= DW_UNSND (&attr
);
15803 part_die
->has_type
= 1;
15805 case DW_AT_abstract_origin
:
15806 case DW_AT_specification
:
15807 case DW_AT_extension
:
15808 part_die
->has_specification
= 1;
15809 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15810 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15811 || cu
->per_cu
->is_dwz
);
15813 case DW_AT_sibling
:
15814 /* Ignore absolute siblings, they might point outside of
15815 the current compile unit. */
15816 if (attr
.form
== DW_FORM_ref_addr
)
15817 complaint (&symfile_complaints
,
15818 _("ignoring absolute DW_AT_sibling"));
15821 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15822 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15824 if (sibling_ptr
< info_ptr
)
15825 complaint (&symfile_complaints
,
15826 _("DW_AT_sibling points backwards"));
15827 else if (sibling_ptr
> reader
->buffer_end
)
15828 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15830 part_die
->sibling
= sibling_ptr
;
15833 case DW_AT_byte_size
:
15834 part_die
->has_byte_size
= 1;
15836 case DW_AT_calling_convention
:
15837 /* DWARF doesn't provide a way to identify a program's source-level
15838 entry point. DW_AT_calling_convention attributes are only meant
15839 to describe functions' calling conventions.
15841 However, because it's a necessary piece of information in
15842 Fortran, and because DW_CC_program is the only piece of debugging
15843 information whose definition refers to a 'main program' at all,
15844 several compilers have begun marking Fortran main programs with
15845 DW_CC_program --- even when those functions use the standard
15846 calling conventions.
15848 So until DWARF specifies a way to provide this information and
15849 compilers pick up the new representation, we'll support this
15851 if (DW_UNSND (&attr
) == DW_CC_program
15852 && cu
->language
== language_fortran
)
15853 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15856 if (DW_UNSND (&attr
) == DW_INL_inlined
15857 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15858 part_die
->may_be_inlined
= 1;
15862 if (part_die
->tag
== DW_TAG_imported_unit
)
15864 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15865 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15866 || cu
->per_cu
->is_dwz
);
15875 if (high_pc_relative
)
15876 part_die
->highpc
+= part_die
->lowpc
;
15878 if (has_low_pc_attr
&& has_high_pc_attr
)
15880 /* When using the GNU linker, .gnu.linkonce. sections are used to
15881 eliminate duplicate copies of functions and vtables and such.
15882 The linker will arbitrarily choose one and discard the others.
15883 The AT_*_pc values for such functions refer to local labels in
15884 these sections. If the section from that file was discarded, the
15885 labels are not in the output, so the relocs get a value of 0.
15886 If this is a discarded function, mark the pc bounds as invalid,
15887 so that GDB will ignore it. */
15888 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15890 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15892 complaint (&symfile_complaints
,
15893 _("DW_AT_low_pc %s is zero "
15894 "for DIE at 0x%x [in module %s]"),
15895 paddress (gdbarch
, part_die
->lowpc
),
15896 part_die
->offset
.sect_off
, objfile_name (objfile
));
15898 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15899 else if (part_die
->lowpc
>= part_die
->highpc
)
15901 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15903 complaint (&symfile_complaints
,
15904 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15905 "for DIE at 0x%x [in module %s]"),
15906 paddress (gdbarch
, part_die
->lowpc
),
15907 paddress (gdbarch
, part_die
->highpc
),
15908 part_die
->offset
.sect_off
, objfile_name (objfile
));
15911 part_die
->has_pc_info
= 1;
15917 /* Find a cached partial DIE at OFFSET in CU. */
15919 static struct partial_die_info
*
15920 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15922 struct partial_die_info
*lookup_die
= NULL
;
15923 struct partial_die_info part_die
;
15925 part_die
.offset
= offset
;
15926 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15932 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15933 except in the case of .debug_types DIEs which do not reference
15934 outside their CU (they do however referencing other types via
15935 DW_FORM_ref_sig8). */
15937 static struct partial_die_info
*
15938 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15940 struct objfile
*objfile
= cu
->objfile
;
15941 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15942 struct partial_die_info
*pd
= NULL
;
15944 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15945 && offset_in_cu_p (&cu
->header
, offset
))
15947 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15950 /* We missed recording what we needed.
15951 Load all dies and try again. */
15952 per_cu
= cu
->per_cu
;
15956 /* TUs don't reference other CUs/TUs (except via type signatures). */
15957 if (cu
->per_cu
->is_debug_types
)
15959 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15960 " external reference to offset 0x%lx [in module %s].\n"),
15961 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
15962 bfd_get_filename (objfile
->obfd
));
15964 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
15967 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
15968 load_partial_comp_unit (per_cu
);
15970 per_cu
->cu
->last_used
= 0;
15971 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15974 /* If we didn't find it, and not all dies have been loaded,
15975 load them all and try again. */
15977 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
15979 per_cu
->load_all_dies
= 1;
15981 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15982 THIS_CU->cu may already be in use. So we can't just free it and
15983 replace its DIEs with the ones we read in. Instead, we leave those
15984 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15985 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15987 load_partial_comp_unit (per_cu
);
15989 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15993 internal_error (__FILE__
, __LINE__
,
15994 _("could not find partial DIE 0x%x "
15995 "in cache [from module %s]\n"),
15996 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16000 /* See if we can figure out if the class lives in a namespace. We do
16001 this by looking for a member function; its demangled name will
16002 contain namespace info, if there is any. */
16005 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16006 struct dwarf2_cu
*cu
)
16008 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16009 what template types look like, because the demangler
16010 frequently doesn't give the same name as the debug info. We
16011 could fix this by only using the demangled name to get the
16012 prefix (but see comment in read_structure_type). */
16014 struct partial_die_info
*real_pdi
;
16015 struct partial_die_info
*child_pdi
;
16017 /* If this DIE (this DIE's specification, if any) has a parent, then
16018 we should not do this. We'll prepend the parent's fully qualified
16019 name when we create the partial symbol. */
16021 real_pdi
= struct_pdi
;
16022 while (real_pdi
->has_specification
)
16023 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16024 real_pdi
->spec_is_dwz
, cu
);
16026 if (real_pdi
->die_parent
!= NULL
)
16029 for (child_pdi
= struct_pdi
->die_child
;
16031 child_pdi
= child_pdi
->die_sibling
)
16033 if (child_pdi
->tag
== DW_TAG_subprogram
16034 && child_pdi
->linkage_name
!= NULL
)
16036 char *actual_class_name
16037 = language_class_name_from_physname (cu
->language_defn
,
16038 child_pdi
->linkage_name
);
16039 if (actual_class_name
!= NULL
)
16042 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16044 strlen (actual_class_name
));
16045 xfree (actual_class_name
);
16052 /* Adjust PART_DIE before generating a symbol for it. This function
16053 may set the is_external flag or change the DIE's name. */
16056 fixup_partial_die (struct partial_die_info
*part_die
,
16057 struct dwarf2_cu
*cu
)
16059 /* Once we've fixed up a die, there's no point in doing so again.
16060 This also avoids a memory leak if we were to call
16061 guess_partial_die_structure_name multiple times. */
16062 if (part_die
->fixup_called
)
16065 /* If we found a reference attribute and the DIE has no name, try
16066 to find a name in the referred to DIE. */
16068 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16070 struct partial_die_info
*spec_die
;
16072 spec_die
= find_partial_die (part_die
->spec_offset
,
16073 part_die
->spec_is_dwz
, cu
);
16075 fixup_partial_die (spec_die
, cu
);
16077 if (spec_die
->name
)
16079 part_die
->name
= spec_die
->name
;
16081 /* Copy DW_AT_external attribute if it is set. */
16082 if (spec_die
->is_external
)
16083 part_die
->is_external
= spec_die
->is_external
;
16087 /* Set default names for some unnamed DIEs. */
16089 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16090 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16092 /* If there is no parent die to provide a namespace, and there are
16093 children, see if we can determine the namespace from their linkage
16095 if (cu
->language
== language_cplus
16096 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16097 && part_die
->die_parent
== NULL
16098 && part_die
->has_children
16099 && (part_die
->tag
== DW_TAG_class_type
16100 || part_die
->tag
== DW_TAG_structure_type
16101 || part_die
->tag
== DW_TAG_union_type
))
16102 guess_partial_die_structure_name (part_die
, cu
);
16104 /* GCC might emit a nameless struct or union that has a linkage
16105 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16106 if (part_die
->name
== NULL
16107 && (part_die
->tag
== DW_TAG_class_type
16108 || part_die
->tag
== DW_TAG_interface_type
16109 || part_die
->tag
== DW_TAG_structure_type
16110 || part_die
->tag
== DW_TAG_union_type
)
16111 && part_die
->linkage_name
!= NULL
)
16115 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16120 /* Strip any leading namespaces/classes, keep only the base name.
16121 DW_AT_name for named DIEs does not contain the prefixes. */
16122 base
= strrchr (demangled
, ':');
16123 if (base
&& base
> demangled
&& base
[-1] == ':')
16129 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16130 base
, strlen (base
));
16135 part_die
->fixup_called
= 1;
16138 /* Read an attribute value described by an attribute form. */
16140 static const gdb_byte
*
16141 read_attribute_value (const struct die_reader_specs
*reader
,
16142 struct attribute
*attr
, unsigned form
,
16143 const gdb_byte
*info_ptr
)
16145 struct dwarf2_cu
*cu
= reader
->cu
;
16146 struct objfile
*objfile
= cu
->objfile
;
16147 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16148 bfd
*abfd
= reader
->abfd
;
16149 struct comp_unit_head
*cu_header
= &cu
->header
;
16150 unsigned int bytes_read
;
16151 struct dwarf_block
*blk
;
16156 case DW_FORM_ref_addr
:
16157 if (cu
->header
.version
== 2)
16158 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16160 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16161 &cu
->header
, &bytes_read
);
16162 info_ptr
+= bytes_read
;
16164 case DW_FORM_GNU_ref_alt
:
16165 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16166 info_ptr
+= bytes_read
;
16169 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16170 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16171 info_ptr
+= bytes_read
;
16173 case DW_FORM_block2
:
16174 blk
= dwarf_alloc_block (cu
);
16175 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16177 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16178 info_ptr
+= blk
->size
;
16179 DW_BLOCK (attr
) = blk
;
16181 case DW_FORM_block4
:
16182 blk
= dwarf_alloc_block (cu
);
16183 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16185 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16186 info_ptr
+= blk
->size
;
16187 DW_BLOCK (attr
) = blk
;
16189 case DW_FORM_data2
:
16190 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16193 case DW_FORM_data4
:
16194 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16197 case DW_FORM_data8
:
16198 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16201 case DW_FORM_sec_offset
:
16202 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16203 info_ptr
+= bytes_read
;
16205 case DW_FORM_string
:
16206 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16207 DW_STRING_IS_CANONICAL (attr
) = 0;
16208 info_ptr
+= bytes_read
;
16211 if (!cu
->per_cu
->is_dwz
)
16213 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16215 DW_STRING_IS_CANONICAL (attr
) = 0;
16216 info_ptr
+= bytes_read
;
16220 case DW_FORM_GNU_strp_alt
:
16222 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16223 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16226 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16227 DW_STRING_IS_CANONICAL (attr
) = 0;
16228 info_ptr
+= bytes_read
;
16231 case DW_FORM_exprloc
:
16232 case DW_FORM_block
:
16233 blk
= dwarf_alloc_block (cu
);
16234 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16235 info_ptr
+= bytes_read
;
16236 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16237 info_ptr
+= blk
->size
;
16238 DW_BLOCK (attr
) = blk
;
16240 case DW_FORM_block1
:
16241 blk
= dwarf_alloc_block (cu
);
16242 blk
->size
= read_1_byte (abfd
, info_ptr
);
16244 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16245 info_ptr
+= blk
->size
;
16246 DW_BLOCK (attr
) = blk
;
16248 case DW_FORM_data1
:
16249 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16253 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16256 case DW_FORM_flag_present
:
16257 DW_UNSND (attr
) = 1;
16259 case DW_FORM_sdata
:
16260 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16261 info_ptr
+= bytes_read
;
16263 case DW_FORM_udata
:
16264 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16265 info_ptr
+= bytes_read
;
16268 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16269 + read_1_byte (abfd
, info_ptr
));
16273 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16274 + read_2_bytes (abfd
, info_ptr
));
16278 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16279 + read_4_bytes (abfd
, info_ptr
));
16283 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16284 + read_8_bytes (abfd
, info_ptr
));
16287 case DW_FORM_ref_sig8
:
16288 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16291 case DW_FORM_ref_udata
:
16292 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16293 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16294 info_ptr
+= bytes_read
;
16296 case DW_FORM_indirect
:
16297 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16298 info_ptr
+= bytes_read
;
16299 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16301 case DW_FORM_GNU_addr_index
:
16302 if (reader
->dwo_file
== NULL
)
16304 /* For now flag a hard error.
16305 Later we can turn this into a complaint. */
16306 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16307 dwarf_form_name (form
),
16308 bfd_get_filename (abfd
));
16310 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16311 info_ptr
+= bytes_read
;
16313 case DW_FORM_GNU_str_index
:
16314 if (reader
->dwo_file
== NULL
)
16316 /* For now flag a hard error.
16317 Later we can turn this into a complaint if warranted. */
16318 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16319 dwarf_form_name (form
),
16320 bfd_get_filename (abfd
));
16323 ULONGEST str_index
=
16324 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16326 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16327 DW_STRING_IS_CANONICAL (attr
) = 0;
16328 info_ptr
+= bytes_read
;
16332 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16333 dwarf_form_name (form
),
16334 bfd_get_filename (abfd
));
16338 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16339 attr
->form
= DW_FORM_GNU_ref_alt
;
16341 /* We have seen instances where the compiler tried to emit a byte
16342 size attribute of -1 which ended up being encoded as an unsigned
16343 0xffffffff. Although 0xffffffff is technically a valid size value,
16344 an object of this size seems pretty unlikely so we can relatively
16345 safely treat these cases as if the size attribute was invalid and
16346 treat them as zero by default. */
16347 if (attr
->name
== DW_AT_byte_size
16348 && form
== DW_FORM_data4
16349 && DW_UNSND (attr
) >= 0xffffffff)
16352 (&symfile_complaints
,
16353 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16354 hex_string (DW_UNSND (attr
)));
16355 DW_UNSND (attr
) = 0;
16361 /* Read an attribute described by an abbreviated attribute. */
16363 static const gdb_byte
*
16364 read_attribute (const struct die_reader_specs
*reader
,
16365 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16366 const gdb_byte
*info_ptr
)
16368 attr
->name
= abbrev
->name
;
16369 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16372 /* Read dwarf information from a buffer. */
16374 static unsigned int
16375 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16377 return bfd_get_8 (abfd
, buf
);
16381 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16383 return bfd_get_signed_8 (abfd
, buf
);
16386 static unsigned int
16387 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16389 return bfd_get_16 (abfd
, buf
);
16393 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16395 return bfd_get_signed_16 (abfd
, buf
);
16398 static unsigned int
16399 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16401 return bfd_get_32 (abfd
, buf
);
16405 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16407 return bfd_get_signed_32 (abfd
, buf
);
16411 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16413 return bfd_get_64 (abfd
, buf
);
16417 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16418 unsigned int *bytes_read
)
16420 struct comp_unit_head
*cu_header
= &cu
->header
;
16421 CORE_ADDR retval
= 0;
16423 if (cu_header
->signed_addr_p
)
16425 switch (cu_header
->addr_size
)
16428 retval
= bfd_get_signed_16 (abfd
, buf
);
16431 retval
= bfd_get_signed_32 (abfd
, buf
);
16434 retval
= bfd_get_signed_64 (abfd
, buf
);
16437 internal_error (__FILE__
, __LINE__
,
16438 _("read_address: bad switch, signed [in module %s]"),
16439 bfd_get_filename (abfd
));
16444 switch (cu_header
->addr_size
)
16447 retval
= bfd_get_16 (abfd
, buf
);
16450 retval
= bfd_get_32 (abfd
, buf
);
16453 retval
= bfd_get_64 (abfd
, buf
);
16456 internal_error (__FILE__
, __LINE__
,
16457 _("read_address: bad switch, "
16458 "unsigned [in module %s]"),
16459 bfd_get_filename (abfd
));
16463 *bytes_read
= cu_header
->addr_size
;
16467 /* Read the initial length from a section. The (draft) DWARF 3
16468 specification allows the initial length to take up either 4 bytes
16469 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16470 bytes describe the length and all offsets will be 8 bytes in length
16473 An older, non-standard 64-bit format is also handled by this
16474 function. The older format in question stores the initial length
16475 as an 8-byte quantity without an escape value. Lengths greater
16476 than 2^32 aren't very common which means that the initial 4 bytes
16477 is almost always zero. Since a length value of zero doesn't make
16478 sense for the 32-bit format, this initial zero can be considered to
16479 be an escape value which indicates the presence of the older 64-bit
16480 format. As written, the code can't detect (old format) lengths
16481 greater than 4GB. If it becomes necessary to handle lengths
16482 somewhat larger than 4GB, we could allow other small values (such
16483 as the non-sensical values of 1, 2, and 3) to also be used as
16484 escape values indicating the presence of the old format.
16486 The value returned via bytes_read should be used to increment the
16487 relevant pointer after calling read_initial_length().
16489 [ Note: read_initial_length() and read_offset() are based on the
16490 document entitled "DWARF Debugging Information Format", revision
16491 3, draft 8, dated November 19, 2001. This document was obtained
16494 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16496 This document is only a draft and is subject to change. (So beware.)
16498 Details regarding the older, non-standard 64-bit format were
16499 determined empirically by examining 64-bit ELF files produced by
16500 the SGI toolchain on an IRIX 6.5 machine.
16502 - Kevin, July 16, 2002
16506 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16508 LONGEST length
= bfd_get_32 (abfd
, buf
);
16510 if (length
== 0xffffffff)
16512 length
= bfd_get_64 (abfd
, buf
+ 4);
16515 else if (length
== 0)
16517 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16518 length
= bfd_get_64 (abfd
, buf
);
16529 /* Cover function for read_initial_length.
16530 Returns the length of the object at BUF, and stores the size of the
16531 initial length in *BYTES_READ and stores the size that offsets will be in
16533 If the initial length size is not equivalent to that specified in
16534 CU_HEADER then issue a complaint.
16535 This is useful when reading non-comp-unit headers. */
16538 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16539 const struct comp_unit_head
*cu_header
,
16540 unsigned int *bytes_read
,
16541 unsigned int *offset_size
)
16543 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16545 gdb_assert (cu_header
->initial_length_size
== 4
16546 || cu_header
->initial_length_size
== 8
16547 || cu_header
->initial_length_size
== 12);
16549 if (cu_header
->initial_length_size
!= *bytes_read
)
16550 complaint (&symfile_complaints
,
16551 _("intermixed 32-bit and 64-bit DWARF sections"));
16553 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16557 /* Read an offset from the data stream. The size of the offset is
16558 given by cu_header->offset_size. */
16561 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16562 const struct comp_unit_head
*cu_header
,
16563 unsigned int *bytes_read
)
16565 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16567 *bytes_read
= cu_header
->offset_size
;
16571 /* Read an offset from the data stream. */
16574 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16576 LONGEST retval
= 0;
16578 switch (offset_size
)
16581 retval
= bfd_get_32 (abfd
, buf
);
16584 retval
= bfd_get_64 (abfd
, buf
);
16587 internal_error (__FILE__
, __LINE__
,
16588 _("read_offset_1: bad switch [in module %s]"),
16589 bfd_get_filename (abfd
));
16595 static const gdb_byte
*
16596 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16598 /* If the size of a host char is 8 bits, we can return a pointer
16599 to the buffer, otherwise we have to copy the data to a buffer
16600 allocated on the temporary obstack. */
16601 gdb_assert (HOST_CHAR_BIT
== 8);
16605 static const char *
16606 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16607 unsigned int *bytes_read_ptr
)
16609 /* If the size of a host char is 8 bits, we can return a pointer
16610 to the string, otherwise we have to copy the string to a buffer
16611 allocated on the temporary obstack. */
16612 gdb_assert (HOST_CHAR_BIT
== 8);
16615 *bytes_read_ptr
= 1;
16618 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16619 return (const char *) buf
;
16622 static const char *
16623 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16625 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16626 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16627 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16628 bfd_get_filename (abfd
));
16629 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16630 error (_("DW_FORM_strp pointing outside of "
16631 ".debug_str section [in module %s]"),
16632 bfd_get_filename (abfd
));
16633 gdb_assert (HOST_CHAR_BIT
== 8);
16634 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16636 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16639 /* Read a string at offset STR_OFFSET in the .debug_str section from
16640 the .dwz file DWZ. Throw an error if the offset is too large. If
16641 the string consists of a single NUL byte, return NULL; otherwise
16642 return a pointer to the string. */
16644 static const char *
16645 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16647 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16649 if (dwz
->str
.buffer
== NULL
)
16650 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16651 "section [in module %s]"),
16652 bfd_get_filename (dwz
->dwz_bfd
));
16653 if (str_offset
>= dwz
->str
.size
)
16654 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16655 ".debug_str section [in module %s]"),
16656 bfd_get_filename (dwz
->dwz_bfd
));
16657 gdb_assert (HOST_CHAR_BIT
== 8);
16658 if (dwz
->str
.buffer
[str_offset
] == '\0')
16660 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16663 static const char *
16664 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16665 const struct comp_unit_head
*cu_header
,
16666 unsigned int *bytes_read_ptr
)
16668 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16670 return read_indirect_string_at_offset (abfd
, str_offset
);
16674 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16675 unsigned int *bytes_read_ptr
)
16678 unsigned int num_read
;
16680 unsigned char byte
;
16688 byte
= bfd_get_8 (abfd
, buf
);
16691 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16692 if ((byte
& 128) == 0)
16698 *bytes_read_ptr
= num_read
;
16703 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16704 unsigned int *bytes_read_ptr
)
16707 int i
, shift
, num_read
;
16708 unsigned char byte
;
16716 byte
= bfd_get_8 (abfd
, buf
);
16719 result
|= ((LONGEST
) (byte
& 127) << shift
);
16721 if ((byte
& 128) == 0)
16726 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16727 result
|= -(((LONGEST
) 1) << shift
);
16728 *bytes_read_ptr
= num_read
;
16732 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16733 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16734 ADDR_SIZE is the size of addresses from the CU header. */
16737 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16739 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16740 bfd
*abfd
= objfile
->obfd
;
16741 const gdb_byte
*info_ptr
;
16743 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16744 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16745 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16746 objfile_name (objfile
));
16747 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16748 error (_("DW_FORM_addr_index pointing outside of "
16749 ".debug_addr section [in module %s]"),
16750 objfile_name (objfile
));
16751 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16752 + addr_base
+ addr_index
* addr_size
);
16753 if (addr_size
== 4)
16754 return bfd_get_32 (abfd
, info_ptr
);
16756 return bfd_get_64 (abfd
, info_ptr
);
16759 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16762 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16764 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16767 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16770 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16771 unsigned int *bytes_read
)
16773 bfd
*abfd
= cu
->objfile
->obfd
;
16774 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16776 return read_addr_index (cu
, addr_index
);
16779 /* Data structure to pass results from dwarf2_read_addr_index_reader
16780 back to dwarf2_read_addr_index. */
16782 struct dwarf2_read_addr_index_data
16784 ULONGEST addr_base
;
16788 /* die_reader_func for dwarf2_read_addr_index. */
16791 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16792 const gdb_byte
*info_ptr
,
16793 struct die_info
*comp_unit_die
,
16797 struct dwarf2_cu
*cu
= reader
->cu
;
16798 struct dwarf2_read_addr_index_data
*aidata
=
16799 (struct dwarf2_read_addr_index_data
*) data
;
16801 aidata
->addr_base
= cu
->addr_base
;
16802 aidata
->addr_size
= cu
->header
.addr_size
;
16805 /* Given an index in .debug_addr, fetch the value.
16806 NOTE: This can be called during dwarf expression evaluation,
16807 long after the debug information has been read, and thus per_cu->cu
16808 may no longer exist. */
16811 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16812 unsigned int addr_index
)
16814 struct objfile
*objfile
= per_cu
->objfile
;
16815 struct dwarf2_cu
*cu
= per_cu
->cu
;
16816 ULONGEST addr_base
;
16819 /* This is intended to be called from outside this file. */
16820 dw2_setup (objfile
);
16822 /* We need addr_base and addr_size.
16823 If we don't have PER_CU->cu, we have to get it.
16824 Nasty, but the alternative is storing the needed info in PER_CU,
16825 which at this point doesn't seem justified: it's not clear how frequently
16826 it would get used and it would increase the size of every PER_CU.
16827 Entry points like dwarf2_per_cu_addr_size do a similar thing
16828 so we're not in uncharted territory here.
16829 Alas we need to be a bit more complicated as addr_base is contained
16832 We don't need to read the entire CU(/TU).
16833 We just need the header and top level die.
16835 IWBN to use the aging mechanism to let us lazily later discard the CU.
16836 For now we skip this optimization. */
16840 addr_base
= cu
->addr_base
;
16841 addr_size
= cu
->header
.addr_size
;
16845 struct dwarf2_read_addr_index_data aidata
;
16847 /* Note: We can't use init_cutu_and_read_dies_simple here,
16848 we need addr_base. */
16849 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16850 dwarf2_read_addr_index_reader
, &aidata
);
16851 addr_base
= aidata
.addr_base
;
16852 addr_size
= aidata
.addr_size
;
16855 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16858 /* Given a DW_FORM_GNU_str_index, fetch the string.
16859 This is only used by the Fission support. */
16861 static const char *
16862 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16864 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16865 const char *objf_name
= objfile_name (objfile
);
16866 bfd
*abfd
= objfile
->obfd
;
16867 struct dwarf2_cu
*cu
= reader
->cu
;
16868 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16869 struct dwarf2_section_info
*str_offsets_section
=
16870 &reader
->dwo_file
->sections
.str_offsets
;
16871 const gdb_byte
*info_ptr
;
16872 ULONGEST str_offset
;
16873 static const char form_name
[] = "DW_FORM_GNU_str_index";
16875 dwarf2_read_section (objfile
, str_section
);
16876 dwarf2_read_section (objfile
, str_offsets_section
);
16877 if (str_section
->buffer
== NULL
)
16878 error (_("%s used without .debug_str.dwo section"
16879 " in CU at offset 0x%lx [in module %s]"),
16880 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16881 if (str_offsets_section
->buffer
== NULL
)
16882 error (_("%s used without .debug_str_offsets.dwo section"
16883 " in CU at offset 0x%lx [in module %s]"),
16884 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16885 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16886 error (_("%s pointing outside of .debug_str_offsets.dwo"
16887 " section in CU at offset 0x%lx [in module %s]"),
16888 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16889 info_ptr
= (str_offsets_section
->buffer
16890 + str_index
* cu
->header
.offset_size
);
16891 if (cu
->header
.offset_size
== 4)
16892 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16894 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16895 if (str_offset
>= str_section
->size
)
16896 error (_("Offset from %s pointing outside of"
16897 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16898 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16899 return (const char *) (str_section
->buffer
+ str_offset
);
16902 /* Return the length of an LEB128 number in BUF. */
16905 leb128_size (const gdb_byte
*buf
)
16907 const gdb_byte
*begin
= buf
;
16913 if ((byte
& 128) == 0)
16914 return buf
- begin
;
16919 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16928 cu
->language
= language_c
;
16930 case DW_LANG_C_plus_plus
:
16931 case DW_LANG_C_plus_plus_11
:
16932 case DW_LANG_C_plus_plus_14
:
16933 cu
->language
= language_cplus
;
16936 cu
->language
= language_d
;
16938 case DW_LANG_Fortran77
:
16939 case DW_LANG_Fortran90
:
16940 case DW_LANG_Fortran95
:
16941 case DW_LANG_Fortran03
:
16942 case DW_LANG_Fortran08
:
16943 cu
->language
= language_fortran
;
16946 cu
->language
= language_go
;
16948 case DW_LANG_Mips_Assembler
:
16949 cu
->language
= language_asm
;
16952 cu
->language
= language_java
;
16954 case DW_LANG_Ada83
:
16955 case DW_LANG_Ada95
:
16956 cu
->language
= language_ada
;
16958 case DW_LANG_Modula2
:
16959 cu
->language
= language_m2
;
16961 case DW_LANG_Pascal83
:
16962 cu
->language
= language_pascal
;
16965 cu
->language
= language_objc
;
16967 case DW_LANG_Cobol74
:
16968 case DW_LANG_Cobol85
:
16970 cu
->language
= language_minimal
;
16973 cu
->language_defn
= language_def (cu
->language
);
16976 /* Return the named attribute or NULL if not there. */
16978 static struct attribute
*
16979 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
16984 struct attribute
*spec
= NULL
;
16986 for (i
= 0; i
< die
->num_attrs
; ++i
)
16988 if (die
->attrs
[i
].name
== name
)
16989 return &die
->attrs
[i
];
16990 if (die
->attrs
[i
].name
== DW_AT_specification
16991 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
16992 spec
= &die
->attrs
[i
];
16998 die
= follow_die_ref (die
, spec
, &cu
);
17004 /* Return the named attribute or NULL if not there,
17005 but do not follow DW_AT_specification, etc.
17006 This is for use in contexts where we're reading .debug_types dies.
17007 Following DW_AT_specification, DW_AT_abstract_origin will take us
17008 back up the chain, and we want to go down. */
17010 static struct attribute
*
17011 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17015 for (i
= 0; i
< die
->num_attrs
; ++i
)
17016 if (die
->attrs
[i
].name
== name
)
17017 return &die
->attrs
[i
];
17022 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17023 and holds a non-zero value. This function should only be used for
17024 DW_FORM_flag or DW_FORM_flag_present attributes. */
17027 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17029 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17031 return (attr
&& DW_UNSND (attr
));
17035 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17037 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17038 which value is non-zero. However, we have to be careful with
17039 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17040 (via dwarf2_flag_true_p) follows this attribute. So we may
17041 end up accidently finding a declaration attribute that belongs
17042 to a different DIE referenced by the specification attribute,
17043 even though the given DIE does not have a declaration attribute. */
17044 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17045 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17048 /* Return the die giving the specification for DIE, if there is
17049 one. *SPEC_CU is the CU containing DIE on input, and the CU
17050 containing the return value on output. If there is no
17051 specification, but there is an abstract origin, that is
17054 static struct die_info
*
17055 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17057 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17060 if (spec_attr
== NULL
)
17061 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17063 if (spec_attr
== NULL
)
17066 return follow_die_ref (die
, spec_attr
, spec_cu
);
17069 /* Free the line_header structure *LH, and any arrays and strings it
17071 NOTE: This is also used as a "cleanup" function. */
17074 free_line_header (struct line_header
*lh
)
17076 if (lh
->standard_opcode_lengths
)
17077 xfree (lh
->standard_opcode_lengths
);
17079 /* Remember that all the lh->file_names[i].name pointers are
17080 pointers into debug_line_buffer, and don't need to be freed. */
17081 if (lh
->file_names
)
17082 xfree (lh
->file_names
);
17084 /* Similarly for the include directory names. */
17085 if (lh
->include_dirs
)
17086 xfree (lh
->include_dirs
);
17091 /* Stub for free_line_header to match void * callback types. */
17094 free_line_header_voidp (void *arg
)
17096 struct line_header
*lh
= arg
;
17098 free_line_header (lh
);
17101 /* Add an entry to LH's include directory table. */
17104 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17106 /* Grow the array if necessary. */
17107 if (lh
->include_dirs_size
== 0)
17109 lh
->include_dirs_size
= 1; /* for testing */
17110 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17111 * sizeof (*lh
->include_dirs
));
17113 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17115 lh
->include_dirs_size
*= 2;
17116 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17117 (lh
->include_dirs_size
17118 * sizeof (*lh
->include_dirs
)));
17121 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17124 /* Add an entry to LH's file name table. */
17127 add_file_name (struct line_header
*lh
,
17129 unsigned int dir_index
,
17130 unsigned int mod_time
,
17131 unsigned int length
)
17133 struct file_entry
*fe
;
17135 /* Grow the array if necessary. */
17136 if (lh
->file_names_size
== 0)
17138 lh
->file_names_size
= 1; /* for testing */
17139 lh
->file_names
= xmalloc (lh
->file_names_size
17140 * sizeof (*lh
->file_names
));
17142 else if (lh
->num_file_names
>= lh
->file_names_size
)
17144 lh
->file_names_size
*= 2;
17145 lh
->file_names
= xrealloc (lh
->file_names
,
17146 (lh
->file_names_size
17147 * sizeof (*lh
->file_names
)));
17150 fe
= &lh
->file_names
[lh
->num_file_names
++];
17152 fe
->dir_index
= dir_index
;
17153 fe
->mod_time
= mod_time
;
17154 fe
->length
= length
;
17155 fe
->included_p
= 0;
17159 /* A convenience function to find the proper .debug_line section for a
17162 static struct dwarf2_section_info
*
17163 get_debug_line_section (struct dwarf2_cu
*cu
)
17165 struct dwarf2_section_info
*section
;
17167 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17169 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17170 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17171 else if (cu
->per_cu
->is_dwz
)
17173 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17175 section
= &dwz
->line
;
17178 section
= &dwarf2_per_objfile
->line
;
17183 /* Read the statement program header starting at OFFSET in
17184 .debug_line, or .debug_line.dwo. Return a pointer
17185 to a struct line_header, allocated using xmalloc.
17186 Returns NULL if there is a problem reading the header, e.g., if it
17187 has a version we don't understand.
17189 NOTE: the strings in the include directory and file name tables of
17190 the returned object point into the dwarf line section buffer,
17191 and must not be freed. */
17193 static struct line_header
*
17194 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17196 struct cleanup
*back_to
;
17197 struct line_header
*lh
;
17198 const gdb_byte
*line_ptr
;
17199 unsigned int bytes_read
, offset_size
;
17201 const char *cur_dir
, *cur_file
;
17202 struct dwarf2_section_info
*section
;
17205 section
= get_debug_line_section (cu
);
17206 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17207 if (section
->buffer
== NULL
)
17209 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17210 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17212 complaint (&symfile_complaints
, _("missing .debug_line section"));
17216 /* We can't do this until we know the section is non-empty.
17217 Only then do we know we have such a section. */
17218 abfd
= get_section_bfd_owner (section
);
17220 /* Make sure that at least there's room for the total_length field.
17221 That could be 12 bytes long, but we're just going to fudge that. */
17222 if (offset
+ 4 >= section
->size
)
17224 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17228 lh
= xmalloc (sizeof (*lh
));
17229 memset (lh
, 0, sizeof (*lh
));
17230 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17233 lh
->offset
.sect_off
= offset
;
17234 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17236 line_ptr
= section
->buffer
+ offset
;
17238 /* Read in the header. */
17240 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17241 &bytes_read
, &offset_size
);
17242 line_ptr
+= bytes_read
;
17243 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17245 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17246 do_cleanups (back_to
);
17249 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17250 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17252 if (lh
->version
> 4)
17254 /* This is a version we don't understand. The format could have
17255 changed in ways we don't handle properly so just punt. */
17256 complaint (&symfile_complaints
,
17257 _("unsupported version in .debug_line section"));
17260 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17261 line_ptr
+= offset_size
;
17262 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17264 if (lh
->version
>= 4)
17266 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17270 lh
->maximum_ops_per_instruction
= 1;
17272 if (lh
->maximum_ops_per_instruction
== 0)
17274 lh
->maximum_ops_per_instruction
= 1;
17275 complaint (&symfile_complaints
,
17276 _("invalid maximum_ops_per_instruction "
17277 "in `.debug_line' section"));
17280 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17282 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17284 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17286 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17288 lh
->standard_opcode_lengths
17289 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17291 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17292 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17294 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17298 /* Read directory table. */
17299 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17301 line_ptr
+= bytes_read
;
17302 add_include_dir (lh
, cur_dir
);
17304 line_ptr
+= bytes_read
;
17306 /* Read file name table. */
17307 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17309 unsigned int dir_index
, mod_time
, length
;
17311 line_ptr
+= bytes_read
;
17312 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17313 line_ptr
+= bytes_read
;
17314 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17315 line_ptr
+= bytes_read
;
17316 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17317 line_ptr
+= bytes_read
;
17319 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17321 line_ptr
+= bytes_read
;
17322 lh
->statement_program_start
= line_ptr
;
17324 if (line_ptr
> (section
->buffer
+ section
->size
))
17325 complaint (&symfile_complaints
,
17326 _("line number info header doesn't "
17327 "fit in `.debug_line' section"));
17329 discard_cleanups (back_to
);
17333 /* Subroutine of dwarf_decode_lines to simplify it.
17334 Return the file name of the psymtab for included file FILE_INDEX
17335 in line header LH of PST.
17336 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17337 If space for the result is malloc'd, it will be freed by a cleanup.
17338 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17340 The function creates dangling cleanup registration. */
17342 static const char *
17343 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17344 const struct partial_symtab
*pst
,
17345 const char *comp_dir
)
17347 const struct file_entry fe
= lh
->file_names
[file_index
];
17348 const char *include_name
= fe
.name
;
17349 const char *include_name_to_compare
= include_name
;
17350 const char *dir_name
= NULL
;
17351 const char *pst_filename
;
17352 char *copied_name
= NULL
;
17356 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17358 if (!IS_ABSOLUTE_PATH (include_name
)
17359 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17361 /* Avoid creating a duplicate psymtab for PST.
17362 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17363 Before we do the comparison, however, we need to account
17364 for DIR_NAME and COMP_DIR.
17365 First prepend dir_name (if non-NULL). If we still don't
17366 have an absolute path prepend comp_dir (if non-NULL).
17367 However, the directory we record in the include-file's
17368 psymtab does not contain COMP_DIR (to match the
17369 corresponding symtab(s)).
17374 bash$ gcc -g ./hello.c
17375 include_name = "hello.c"
17377 DW_AT_comp_dir = comp_dir = "/tmp"
17378 DW_AT_name = "./hello.c"
17382 if (dir_name
!= NULL
)
17384 char *tem
= concat (dir_name
, SLASH_STRING
,
17385 include_name
, (char *)NULL
);
17387 make_cleanup (xfree
, tem
);
17388 include_name
= tem
;
17389 include_name_to_compare
= include_name
;
17391 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17393 char *tem
= concat (comp_dir
, SLASH_STRING
,
17394 include_name
, (char *)NULL
);
17396 make_cleanup (xfree
, tem
);
17397 include_name_to_compare
= tem
;
17401 pst_filename
= pst
->filename
;
17402 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17404 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17405 pst_filename
, (char *)NULL
);
17406 pst_filename
= copied_name
;
17409 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17411 if (copied_name
!= NULL
)
17412 xfree (copied_name
);
17416 return include_name
;
17419 /* Ignore this record_line request. */
17422 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17427 /* Return non-zero if we should add LINE to the line number table.
17428 LINE is the line to add, LAST_LINE is the last line that was added,
17429 LAST_SUBFILE is the subfile for LAST_LINE.
17430 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17431 had a non-zero discriminator.
17433 We have to be careful in the presence of discriminators.
17434 E.g., for this line:
17436 for (i = 0; i < 100000; i++);
17438 clang can emit four line number entries for that one line,
17439 each with a different discriminator.
17440 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17442 However, we want gdb to coalesce all four entries into one.
17443 Otherwise the user could stepi into the middle of the line and
17444 gdb would get confused about whether the pc really was in the
17445 middle of the line.
17447 Things are further complicated by the fact that two consecutive
17448 line number entries for the same line is a heuristic used by gcc
17449 to denote the end of the prologue. So we can't just discard duplicate
17450 entries, we have to be selective about it. The heuristic we use is
17451 that we only collapse consecutive entries for the same line if at least
17452 one of those entries has a non-zero discriminator. PR 17276.
17454 Note: Addresses in the line number state machine can never go backwards
17455 within one sequence, thus this coalescing is ok. */
17458 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17459 int line_has_non_zero_discriminator
,
17460 struct subfile
*last_subfile
)
17462 if (current_subfile
!= last_subfile
)
17464 if (line
!= last_line
)
17466 /* Same line for the same file that we've seen already.
17467 As a last check, for pr 17276, only record the line if the line
17468 has never had a non-zero discriminator. */
17469 if (!line_has_non_zero_discriminator
)
17474 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17475 in the line table of subfile SUBFILE. */
17478 dwarf_record_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17479 unsigned int line
, CORE_ADDR address
,
17480 record_line_ftype p_record_line
)
17482 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17484 (*p_record_line
) (subfile
, line
, addr
);
17487 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17488 Mark the end of a set of line number records.
17489 The arguments are the same as for dwarf_record_line.
17490 If SUBFILE is NULL the request is ignored. */
17493 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17494 CORE_ADDR address
, record_line_ftype p_record_line
)
17496 if (subfile
!= NULL
)
17497 dwarf_record_line (gdbarch
, subfile
, 0, address
, p_record_line
);
17500 /* Subroutine of dwarf_decode_lines to simplify it.
17501 Process the line number information in LH. */
17504 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17505 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17507 const gdb_byte
*line_ptr
, *extended_end
;
17508 const gdb_byte
*line_end
;
17509 unsigned int bytes_read
, extended_len
;
17510 unsigned char op_code
, extended_op
;
17511 CORE_ADDR baseaddr
;
17512 struct objfile
*objfile
= cu
->objfile
;
17513 bfd
*abfd
= objfile
->obfd
;
17514 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17515 struct subfile
*last_subfile
= NULL
;
17516 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17519 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17521 line_ptr
= lh
->statement_program_start
;
17522 line_end
= lh
->statement_program_end
;
17524 /* Read the statement sequences until there's nothing left. */
17525 while (line_ptr
< line_end
)
17527 /* State machine registers. Call `gdbarch_adjust_dwarf2_line'
17528 on the initial 0 address as if there was a line entry for it
17529 so that the backend has a chance to adjust it and also record
17530 it in case it needs it. This is currently used by MIPS code,
17531 cf. `mips_adjust_dwarf2_line'. */
17532 CORE_ADDR address
= gdbarch_adjust_dwarf2_line (gdbarch
, 0, 0);
17533 unsigned int file
= 1;
17534 unsigned int line
= 1;
17535 int is_stmt
= lh
->default_is_stmt
;
17536 int end_sequence
= 0;
17537 unsigned char op_index
= 0;
17538 unsigned int discriminator
= 0;
17539 /* The last line number that was recorded, used to coalesce
17540 consecutive entries for the same line. This can happen, for
17541 example, when discriminators are present. PR 17276. */
17542 unsigned int last_line
= 0;
17543 int line_has_non_zero_discriminator
= 0;
17545 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17547 /* Start a subfile for the current file of the state machine. */
17548 /* lh->include_dirs and lh->file_names are 0-based, but the
17549 directory and file name numbers in the statement program
17551 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17552 const char *dir
= NULL
;
17555 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17557 dwarf2_start_subfile (fe
->name
, dir
);
17560 /* Decode the table. */
17561 while (!end_sequence
)
17563 op_code
= read_1_byte (abfd
, line_ptr
);
17565 if (line_ptr
> line_end
)
17567 dwarf2_debug_line_missing_end_sequence_complaint ();
17571 if (op_code
>= lh
->opcode_base
)
17573 /* Special opcode. */
17574 unsigned char adj_opcode
;
17575 CORE_ADDR addr_adj
;
17578 adj_opcode
= op_code
- lh
->opcode_base
;
17579 addr_adj
= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17580 / lh
->maximum_ops_per_instruction
)
17581 * lh
->minimum_instruction_length
);
17582 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17583 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17584 % lh
->maximum_ops_per_instruction
);
17585 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17586 line
+= line_delta
;
17587 if (line_delta
!= 0)
17588 line_has_non_zero_discriminator
= discriminator
!= 0;
17589 if (lh
->num_file_names
< file
|| file
== 0)
17590 dwarf2_debug_line_missing_file_complaint ();
17591 /* For now we ignore lines not starting on an
17592 instruction boundary. */
17593 else if (op_index
== 0)
17595 lh
->file_names
[file
- 1].included_p
= 1;
17596 if (!decode_for_pst_p
&& is_stmt
)
17598 if (last_subfile
!= current_subfile
)
17600 dwarf_finish_line (gdbarch
, last_subfile
,
17601 address
, p_record_line
);
17603 if (dwarf_record_line_p (line
, last_line
,
17604 line_has_non_zero_discriminator
,
17607 dwarf_record_line (gdbarch
, current_subfile
,
17608 line
, address
, p_record_line
);
17610 last_subfile
= current_subfile
;
17616 else switch (op_code
)
17618 case DW_LNS_extended_op
:
17619 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17621 line_ptr
+= bytes_read
;
17622 extended_end
= line_ptr
+ extended_len
;
17623 extended_op
= read_1_byte (abfd
, line_ptr
);
17625 switch (extended_op
)
17627 case DW_LNE_end_sequence
:
17628 p_record_line
= record_line
;
17631 case DW_LNE_set_address
:
17632 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17634 /* If address < lowpc then it's not a usable value, it's
17635 outside the pc range of the CU. However, we restrict
17636 the test to only address values of zero to preserve
17637 GDB's previous behaviour which is to handle the specific
17638 case of a function being GC'd by the linker. */
17639 if (address
== 0 && address
< lowpc
)
17641 /* This line table is for a function which has been
17642 GCd by the linker. Ignore it. PR gdb/12528 */
17645 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17647 complaint (&symfile_complaints
,
17648 _(".debug_line address at offset 0x%lx is 0 "
17650 line_offset
, objfile_name (objfile
));
17651 p_record_line
= noop_record_line
;
17652 /* Note: p_record_line is left as noop_record_line
17653 until we see DW_LNE_end_sequence. */
17657 line_ptr
+= bytes_read
;
17658 address
+= baseaddr
;
17659 address
= gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17661 case DW_LNE_define_file
:
17663 const char *cur_file
;
17664 unsigned int dir_index
, mod_time
, length
;
17666 cur_file
= read_direct_string (abfd
, line_ptr
,
17668 line_ptr
+= bytes_read
;
17670 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17671 line_ptr
+= bytes_read
;
17673 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17674 line_ptr
+= bytes_read
;
17676 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17677 line_ptr
+= bytes_read
;
17678 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17681 case DW_LNE_set_discriminator
:
17682 /* The discriminator is not interesting to the debugger;
17683 just ignore it. We still need to check its value though:
17684 if there are consecutive entries for the same
17685 (non-prologue) line we want to coalesce them.
17687 discriminator
= read_unsigned_leb128 (abfd
, line_ptr
,
17689 line_has_non_zero_discriminator
|= discriminator
!= 0;
17690 line_ptr
+= bytes_read
;
17693 complaint (&symfile_complaints
,
17694 _("mangled .debug_line section"));
17697 /* Make sure that we parsed the extended op correctly. If e.g.
17698 we expected a different address size than the producer used,
17699 we may have read the wrong number of bytes. */
17700 if (line_ptr
!= extended_end
)
17702 complaint (&symfile_complaints
,
17703 _("mangled .debug_line section"));
17708 if (lh
->num_file_names
< file
|| file
== 0)
17709 dwarf2_debug_line_missing_file_complaint ();
17712 lh
->file_names
[file
- 1].included_p
= 1;
17713 if (!decode_for_pst_p
&& is_stmt
)
17715 if (last_subfile
!= current_subfile
)
17717 dwarf_finish_line (gdbarch
, last_subfile
,
17718 address
, p_record_line
);
17720 if (dwarf_record_line_p (line
, last_line
,
17721 line_has_non_zero_discriminator
,
17724 dwarf_record_line (gdbarch
, current_subfile
,
17725 line
, address
, p_record_line
);
17727 last_subfile
= current_subfile
;
17733 case DW_LNS_advance_pc
:
17736 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17737 CORE_ADDR addr_adj
;
17739 addr_adj
= (((op_index
+ adjust
)
17740 / lh
->maximum_ops_per_instruction
)
17741 * lh
->minimum_instruction_length
);
17742 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17743 op_index
= ((op_index
+ adjust
)
17744 % lh
->maximum_ops_per_instruction
);
17745 line_ptr
+= bytes_read
;
17748 case DW_LNS_advance_line
:
17751 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17753 line
+= line_delta
;
17754 if (line_delta
!= 0)
17755 line_has_non_zero_discriminator
= discriminator
!= 0;
17756 line_ptr
+= bytes_read
;
17759 case DW_LNS_set_file
:
17761 /* The arrays lh->include_dirs and lh->file_names are
17762 0-based, but the directory and file name numbers in
17763 the statement program are 1-based. */
17764 struct file_entry
*fe
;
17765 const char *dir
= NULL
;
17767 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17768 line_ptr
+= bytes_read
;
17769 if (lh
->num_file_names
< file
|| file
== 0)
17770 dwarf2_debug_line_missing_file_complaint ();
17773 fe
= &lh
->file_names
[file
- 1];
17775 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17776 if (!decode_for_pst_p
)
17778 last_subfile
= current_subfile
;
17779 line_has_non_zero_discriminator
= discriminator
!= 0;
17780 dwarf2_start_subfile (fe
->name
, dir
);
17785 case DW_LNS_set_column
:
17786 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17787 line_ptr
+= bytes_read
;
17789 case DW_LNS_negate_stmt
:
17790 is_stmt
= (!is_stmt
);
17792 case DW_LNS_set_basic_block
:
17794 /* Add to the address register of the state machine the
17795 address increment value corresponding to special opcode
17796 255. I.e., this value is scaled by the minimum
17797 instruction length since special opcode 255 would have
17798 scaled the increment. */
17799 case DW_LNS_const_add_pc
:
17801 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17802 CORE_ADDR addr_adj
;
17804 addr_adj
= (((op_index
+ adjust
)
17805 / lh
->maximum_ops_per_instruction
)
17806 * lh
->minimum_instruction_length
);
17807 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17808 op_index
= ((op_index
+ adjust
)
17809 % lh
->maximum_ops_per_instruction
);
17812 case DW_LNS_fixed_advance_pc
:
17814 CORE_ADDR addr_adj
;
17816 addr_adj
= read_2_bytes (abfd
, line_ptr
);
17817 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17824 /* Unknown standard opcode, ignore it. */
17827 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17829 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17830 line_ptr
+= bytes_read
;
17835 if (lh
->num_file_names
< file
|| file
== 0)
17836 dwarf2_debug_line_missing_file_complaint ();
17839 lh
->file_names
[file
- 1].included_p
= 1;
17840 if (!decode_for_pst_p
)
17842 dwarf_finish_line (gdbarch
, current_subfile
, address
,
17849 /* Decode the Line Number Program (LNP) for the given line_header
17850 structure and CU. The actual information extracted and the type
17851 of structures created from the LNP depends on the value of PST.
17853 1. If PST is NULL, then this procedure uses the data from the program
17854 to create all necessary symbol tables, and their linetables.
17856 2. If PST is not NULL, this procedure reads the program to determine
17857 the list of files included by the unit represented by PST, and
17858 builds all the associated partial symbol tables.
17860 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17861 It is used for relative paths in the line table.
17862 NOTE: When processing partial symtabs (pst != NULL),
17863 comp_dir == pst->dirname.
17865 NOTE: It is important that psymtabs have the same file name (via strcmp)
17866 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17867 symtab we don't use it in the name of the psymtabs we create.
17868 E.g. expand_line_sal requires this when finding psymtabs to expand.
17869 A good testcase for this is mb-inline.exp.
17871 LOWPC is the lowest address in CU (or 0 if not known).
17873 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
17874 for its PC<->lines mapping information. Otherwise only the filename
17875 table is read in. */
17878 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17879 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17880 CORE_ADDR lowpc
, int decode_mapping
)
17882 struct objfile
*objfile
= cu
->objfile
;
17883 const int decode_for_pst_p
= (pst
!= NULL
);
17885 if (decode_mapping
)
17886 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
17888 if (decode_for_pst_p
)
17892 /* Now that we're done scanning the Line Header Program, we can
17893 create the psymtab of each included file. */
17894 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17895 if (lh
->file_names
[file_index
].included_p
== 1)
17897 const char *include_name
=
17898 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17899 if (include_name
!= NULL
)
17900 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17905 /* Make sure a symtab is created for every file, even files
17906 which contain only variables (i.e. no code with associated
17908 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
17911 for (i
= 0; i
< lh
->num_file_names
; i
++)
17913 const char *dir
= NULL
;
17914 struct file_entry
*fe
;
17916 fe
= &lh
->file_names
[i
];
17918 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17919 dwarf2_start_subfile (fe
->name
, dir
);
17921 if (current_subfile
->symtab
== NULL
)
17923 current_subfile
->symtab
17924 = allocate_symtab (cust
, current_subfile
->name
);
17926 fe
->symtab
= current_subfile
->symtab
;
17931 /* Start a subfile for DWARF. FILENAME is the name of the file and
17932 DIRNAME the name of the source directory which contains FILENAME
17933 or NULL if not known.
17934 This routine tries to keep line numbers from identical absolute and
17935 relative file names in a common subfile.
17937 Using the `list' example from the GDB testsuite, which resides in
17938 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17939 of /srcdir/list0.c yields the following debugging information for list0.c:
17941 DW_AT_name: /srcdir/list0.c
17942 DW_AT_comp_dir: /compdir
17943 files.files[0].name: list0.h
17944 files.files[0].dir: /srcdir
17945 files.files[1].name: list0.c
17946 files.files[1].dir: /srcdir
17948 The line number information for list0.c has to end up in a single
17949 subfile, so that `break /srcdir/list0.c:1' works as expected.
17950 start_subfile will ensure that this happens provided that we pass the
17951 concatenation of files.files[1].dir and files.files[1].name as the
17955 dwarf2_start_subfile (const char *filename
, const char *dirname
)
17959 /* In order not to lose the line information directory,
17960 we concatenate it to the filename when it makes sense.
17961 Note that the Dwarf3 standard says (speaking of filenames in line
17962 information): ``The directory index is ignored for file names
17963 that represent full path names''. Thus ignoring dirname in the
17964 `else' branch below isn't an issue. */
17966 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
17968 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
17972 start_subfile (filename
);
17978 /* Start a symtab for DWARF.
17979 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17981 static struct compunit_symtab
*
17982 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
17983 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
17985 struct compunit_symtab
*cust
17986 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
17988 record_debugformat ("DWARF 2");
17989 record_producer (cu
->producer
);
17991 /* We assume that we're processing GCC output. */
17992 processing_gcc_compilation
= 2;
17994 cu
->processing_has_namespace_info
= 0;
18000 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18001 struct dwarf2_cu
*cu
)
18003 struct objfile
*objfile
= cu
->objfile
;
18004 struct comp_unit_head
*cu_header
= &cu
->header
;
18006 /* NOTE drow/2003-01-30: There used to be a comment and some special
18007 code here to turn a symbol with DW_AT_external and a
18008 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18009 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18010 with some versions of binutils) where shared libraries could have
18011 relocations against symbols in their debug information - the
18012 minimal symbol would have the right address, but the debug info
18013 would not. It's no longer necessary, because we will explicitly
18014 apply relocations when we read in the debug information now. */
18016 /* A DW_AT_location attribute with no contents indicates that a
18017 variable has been optimized away. */
18018 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18020 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18024 /* Handle one degenerate form of location expression specially, to
18025 preserve GDB's previous behavior when section offsets are
18026 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18027 then mark this symbol as LOC_STATIC. */
18029 if (attr_form_is_block (attr
)
18030 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18031 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18032 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18033 && (DW_BLOCK (attr
)->size
18034 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18036 unsigned int dummy
;
18038 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18039 SYMBOL_VALUE_ADDRESS (sym
) =
18040 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18042 SYMBOL_VALUE_ADDRESS (sym
) =
18043 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18044 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18045 fixup_symbol_section (sym
, objfile
);
18046 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18047 SYMBOL_SECTION (sym
));
18051 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18052 expression evaluator, and use LOC_COMPUTED only when necessary
18053 (i.e. when the value of a register or memory location is
18054 referenced, or a thread-local block, etc.). Then again, it might
18055 not be worthwhile. I'm assuming that it isn't unless performance
18056 or memory numbers show me otherwise. */
18058 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18060 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18061 cu
->has_loclist
= 1;
18064 /* Given a pointer to a DWARF information entry, figure out if we need
18065 to make a symbol table entry for it, and if so, create a new entry
18066 and return a pointer to it.
18067 If TYPE is NULL, determine symbol type from the die, otherwise
18068 used the passed type.
18069 If SPACE is not NULL, use it to hold the new symbol. If it is
18070 NULL, allocate a new symbol on the objfile's obstack. */
18072 static struct symbol
*
18073 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18074 struct symbol
*space
)
18076 struct objfile
*objfile
= cu
->objfile
;
18077 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18078 struct symbol
*sym
= NULL
;
18080 struct attribute
*attr
= NULL
;
18081 struct attribute
*attr2
= NULL
;
18082 CORE_ADDR baseaddr
;
18083 struct pending
**list_to_add
= NULL
;
18085 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18087 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18089 name
= dwarf2_name (die
, cu
);
18092 const char *linkagename
;
18093 int suppress_add
= 0;
18098 sym
= allocate_symbol (objfile
);
18099 OBJSTAT (objfile
, n_syms
++);
18101 /* Cache this symbol's name and the name's demangled form (if any). */
18102 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18103 linkagename
= dwarf2_physname (name
, die
, cu
);
18104 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18106 /* Fortran does not have mangling standard and the mangling does differ
18107 between gfortran, iFort etc. */
18108 if (cu
->language
== language_fortran
18109 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18110 symbol_set_demangled_name (&(sym
->ginfo
),
18111 dwarf2_full_name (name
, die
, cu
),
18114 /* Default assumptions.
18115 Use the passed type or decode it from the die. */
18116 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18117 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18119 SYMBOL_TYPE (sym
) = type
;
18121 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18122 attr
= dwarf2_attr (die
,
18123 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18127 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18130 attr
= dwarf2_attr (die
,
18131 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18135 int file_index
= DW_UNSND (attr
);
18137 if (cu
->line_header
== NULL
18138 || file_index
> cu
->line_header
->num_file_names
)
18139 complaint (&symfile_complaints
,
18140 _("file index out of range"));
18141 else if (file_index
> 0)
18143 struct file_entry
*fe
;
18145 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18146 symbol_set_symtab (sym
, fe
->symtab
);
18153 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18158 addr
= attr_value_as_address (attr
);
18159 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18160 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18162 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18163 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18164 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18165 add_symbol_to_list (sym
, cu
->list_in_scope
);
18167 case DW_TAG_subprogram
:
18168 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18170 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18171 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18172 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18173 || cu
->language
== language_ada
)
18175 /* Subprograms marked external are stored as a global symbol.
18176 Ada subprograms, whether marked external or not, are always
18177 stored as a global symbol, because we want to be able to
18178 access them globally. For instance, we want to be able
18179 to break on a nested subprogram without having to
18180 specify the context. */
18181 list_to_add
= &global_symbols
;
18185 list_to_add
= cu
->list_in_scope
;
18188 case DW_TAG_inlined_subroutine
:
18189 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18191 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18192 SYMBOL_INLINED (sym
) = 1;
18193 list_to_add
= cu
->list_in_scope
;
18195 case DW_TAG_template_value_param
:
18197 /* Fall through. */
18198 case DW_TAG_constant
:
18199 case DW_TAG_variable
:
18200 case DW_TAG_member
:
18201 /* Compilation with minimal debug info may result in
18202 variables with missing type entries. Change the
18203 misleading `void' type to something sensible. */
18204 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18206 = objfile_type (objfile
)->nodebug_data_symbol
;
18208 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18209 /* In the case of DW_TAG_member, we should only be called for
18210 static const members. */
18211 if (die
->tag
== DW_TAG_member
)
18213 /* dwarf2_add_field uses die_is_declaration,
18214 so we do the same. */
18215 gdb_assert (die_is_declaration (die
, cu
));
18220 dwarf2_const_value (attr
, sym
, cu
);
18221 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18224 if (attr2
&& (DW_UNSND (attr2
) != 0))
18225 list_to_add
= &global_symbols
;
18227 list_to_add
= cu
->list_in_scope
;
18231 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18234 var_decode_location (attr
, sym
, cu
);
18235 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18237 /* Fortran explicitly imports any global symbols to the local
18238 scope by DW_TAG_common_block. */
18239 if (cu
->language
== language_fortran
&& die
->parent
18240 && die
->parent
->tag
== DW_TAG_common_block
)
18243 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18244 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18245 && !dwarf2_per_objfile
->has_section_at_zero
)
18247 /* When a static variable is eliminated by the linker,
18248 the corresponding debug information is not stripped
18249 out, but the variable address is set to null;
18250 do not add such variables into symbol table. */
18252 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18254 /* Workaround gfortran PR debug/40040 - it uses
18255 DW_AT_location for variables in -fPIC libraries which may
18256 get overriden by other libraries/executable and get
18257 a different address. Resolve it by the minimal symbol
18258 which may come from inferior's executable using copy
18259 relocation. Make this workaround only for gfortran as for
18260 other compilers GDB cannot guess the minimal symbol
18261 Fortran mangling kind. */
18262 if (cu
->language
== language_fortran
&& die
->parent
18263 && die
->parent
->tag
== DW_TAG_module
18265 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
18266 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18268 /* A variable with DW_AT_external is never static,
18269 but it may be block-scoped. */
18270 list_to_add
= (cu
->list_in_scope
== &file_symbols
18271 ? &global_symbols
: cu
->list_in_scope
);
18274 list_to_add
= cu
->list_in_scope
;
18278 /* We do not know the address of this symbol.
18279 If it is an external symbol and we have type information
18280 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18281 The address of the variable will then be determined from
18282 the minimal symbol table whenever the variable is
18284 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18286 /* Fortran explicitly imports any global symbols to the local
18287 scope by DW_TAG_common_block. */
18288 if (cu
->language
== language_fortran
&& die
->parent
18289 && die
->parent
->tag
== DW_TAG_common_block
)
18291 /* SYMBOL_CLASS doesn't matter here because
18292 read_common_block is going to reset it. */
18294 list_to_add
= cu
->list_in_scope
;
18296 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18297 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18299 /* A variable with DW_AT_external is never static, but it
18300 may be block-scoped. */
18301 list_to_add
= (cu
->list_in_scope
== &file_symbols
18302 ? &global_symbols
: cu
->list_in_scope
);
18304 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18306 else if (!die_is_declaration (die
, cu
))
18308 /* Use the default LOC_OPTIMIZED_OUT class. */
18309 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18311 list_to_add
= cu
->list_in_scope
;
18315 case DW_TAG_formal_parameter
:
18316 /* If we are inside a function, mark this as an argument. If
18317 not, we might be looking at an argument to an inlined function
18318 when we do not have enough information to show inlined frames;
18319 pretend it's a local variable in that case so that the user can
18321 if (context_stack_depth
> 0
18322 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18323 SYMBOL_IS_ARGUMENT (sym
) = 1;
18324 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18327 var_decode_location (attr
, sym
, cu
);
18329 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18332 dwarf2_const_value (attr
, sym
, cu
);
18335 list_to_add
= cu
->list_in_scope
;
18337 case DW_TAG_unspecified_parameters
:
18338 /* From varargs functions; gdb doesn't seem to have any
18339 interest in this information, so just ignore it for now.
18342 case DW_TAG_template_type_param
:
18344 /* Fall through. */
18345 case DW_TAG_class_type
:
18346 case DW_TAG_interface_type
:
18347 case DW_TAG_structure_type
:
18348 case DW_TAG_union_type
:
18349 case DW_TAG_set_type
:
18350 case DW_TAG_enumeration_type
:
18351 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18352 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18355 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18356 really ever be static objects: otherwise, if you try
18357 to, say, break of a class's method and you're in a file
18358 which doesn't mention that class, it won't work unless
18359 the check for all static symbols in lookup_symbol_aux
18360 saves you. See the OtherFileClass tests in
18361 gdb.c++/namespace.exp. */
18365 list_to_add
= (cu
->list_in_scope
== &file_symbols
18366 && (cu
->language
== language_cplus
18367 || cu
->language
== language_java
)
18368 ? &global_symbols
: cu
->list_in_scope
);
18370 /* The semantics of C++ state that "struct foo {
18371 ... }" also defines a typedef for "foo". A Java
18372 class declaration also defines a typedef for the
18374 if (cu
->language
== language_cplus
18375 || cu
->language
== language_java
18376 || cu
->language
== language_ada
)
18378 /* The symbol's name is already allocated along
18379 with this objfile, so we don't need to
18380 duplicate it for the type. */
18381 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18382 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18387 case DW_TAG_typedef
:
18388 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18389 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18390 list_to_add
= cu
->list_in_scope
;
18392 case DW_TAG_base_type
:
18393 case DW_TAG_subrange_type
:
18394 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18395 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18396 list_to_add
= cu
->list_in_scope
;
18398 case DW_TAG_enumerator
:
18399 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18402 dwarf2_const_value (attr
, sym
, cu
);
18405 /* NOTE: carlton/2003-11-10: See comment above in the
18406 DW_TAG_class_type, etc. block. */
18408 list_to_add
= (cu
->list_in_scope
== &file_symbols
18409 && (cu
->language
== language_cplus
18410 || cu
->language
== language_java
)
18411 ? &global_symbols
: cu
->list_in_scope
);
18414 case DW_TAG_imported_declaration
:
18415 case DW_TAG_namespace
:
18416 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18417 list_to_add
= &global_symbols
;
18419 case DW_TAG_module
:
18420 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18421 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18422 list_to_add
= &global_symbols
;
18424 case DW_TAG_common_block
:
18425 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18426 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18427 add_symbol_to_list (sym
, cu
->list_in_scope
);
18430 /* Not a tag we recognize. Hopefully we aren't processing
18431 trash data, but since we must specifically ignore things
18432 we don't recognize, there is nothing else we should do at
18434 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18435 dwarf_tag_name (die
->tag
));
18441 sym
->hash_next
= objfile
->template_symbols
;
18442 objfile
->template_symbols
= sym
;
18443 list_to_add
= NULL
;
18446 if (list_to_add
!= NULL
)
18447 add_symbol_to_list (sym
, list_to_add
);
18449 /* For the benefit of old versions of GCC, check for anonymous
18450 namespaces based on the demangled name. */
18451 if (!cu
->processing_has_namespace_info
18452 && cu
->language
== language_cplus
)
18453 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18458 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18460 static struct symbol
*
18461 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18463 return new_symbol_full (die
, type
, cu
, NULL
);
18466 /* Given an attr with a DW_FORM_dataN value in host byte order,
18467 zero-extend it as appropriate for the symbol's type. The DWARF
18468 standard (v4) is not entirely clear about the meaning of using
18469 DW_FORM_dataN for a constant with a signed type, where the type is
18470 wider than the data. The conclusion of a discussion on the DWARF
18471 list was that this is unspecified. We choose to always zero-extend
18472 because that is the interpretation long in use by GCC. */
18475 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18476 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18478 struct objfile
*objfile
= cu
->objfile
;
18479 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18480 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18481 LONGEST l
= DW_UNSND (attr
);
18483 if (bits
< sizeof (*value
) * 8)
18485 l
&= ((LONGEST
) 1 << bits
) - 1;
18488 else if (bits
== sizeof (*value
) * 8)
18492 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18493 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18500 /* Read a constant value from an attribute. Either set *VALUE, or if
18501 the value does not fit in *VALUE, set *BYTES - either already
18502 allocated on the objfile obstack, or newly allocated on OBSTACK,
18503 or, set *BATON, if we translated the constant to a location
18507 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18508 const char *name
, struct obstack
*obstack
,
18509 struct dwarf2_cu
*cu
,
18510 LONGEST
*value
, const gdb_byte
**bytes
,
18511 struct dwarf2_locexpr_baton
**baton
)
18513 struct objfile
*objfile
= cu
->objfile
;
18514 struct comp_unit_head
*cu_header
= &cu
->header
;
18515 struct dwarf_block
*blk
;
18516 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18517 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18523 switch (attr
->form
)
18526 case DW_FORM_GNU_addr_index
:
18530 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18531 dwarf2_const_value_length_mismatch_complaint (name
,
18532 cu_header
->addr_size
,
18533 TYPE_LENGTH (type
));
18534 /* Symbols of this form are reasonably rare, so we just
18535 piggyback on the existing location code rather than writing
18536 a new implementation of symbol_computed_ops. */
18537 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18538 (*baton
)->per_cu
= cu
->per_cu
;
18539 gdb_assert ((*baton
)->per_cu
);
18541 (*baton
)->size
= 2 + cu_header
->addr_size
;
18542 data
= obstack_alloc (obstack
, (*baton
)->size
);
18543 (*baton
)->data
= data
;
18545 data
[0] = DW_OP_addr
;
18546 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18547 byte_order
, DW_ADDR (attr
));
18548 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18551 case DW_FORM_string
:
18553 case DW_FORM_GNU_str_index
:
18554 case DW_FORM_GNU_strp_alt
:
18555 /* DW_STRING is already allocated on the objfile obstack, point
18557 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18559 case DW_FORM_block1
:
18560 case DW_FORM_block2
:
18561 case DW_FORM_block4
:
18562 case DW_FORM_block
:
18563 case DW_FORM_exprloc
:
18564 blk
= DW_BLOCK (attr
);
18565 if (TYPE_LENGTH (type
) != blk
->size
)
18566 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18567 TYPE_LENGTH (type
));
18568 *bytes
= blk
->data
;
18571 /* The DW_AT_const_value attributes are supposed to carry the
18572 symbol's value "represented as it would be on the target
18573 architecture." By the time we get here, it's already been
18574 converted to host endianness, so we just need to sign- or
18575 zero-extend it as appropriate. */
18576 case DW_FORM_data1
:
18577 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18579 case DW_FORM_data2
:
18580 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18582 case DW_FORM_data4
:
18583 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18585 case DW_FORM_data8
:
18586 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18589 case DW_FORM_sdata
:
18590 *value
= DW_SND (attr
);
18593 case DW_FORM_udata
:
18594 *value
= DW_UNSND (attr
);
18598 complaint (&symfile_complaints
,
18599 _("unsupported const value attribute form: '%s'"),
18600 dwarf_form_name (attr
->form
));
18607 /* Copy constant value from an attribute to a symbol. */
18610 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18611 struct dwarf2_cu
*cu
)
18613 struct objfile
*objfile
= cu
->objfile
;
18614 struct comp_unit_head
*cu_header
= &cu
->header
;
18616 const gdb_byte
*bytes
;
18617 struct dwarf2_locexpr_baton
*baton
;
18619 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18620 SYMBOL_PRINT_NAME (sym
),
18621 &objfile
->objfile_obstack
, cu
,
18622 &value
, &bytes
, &baton
);
18626 SYMBOL_LOCATION_BATON (sym
) = baton
;
18627 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18629 else if (bytes
!= NULL
)
18631 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18632 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18636 SYMBOL_VALUE (sym
) = value
;
18637 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18641 /* Return the type of the die in question using its DW_AT_type attribute. */
18643 static struct type
*
18644 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18646 struct attribute
*type_attr
;
18648 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18651 /* A missing DW_AT_type represents a void type. */
18652 return objfile_type (cu
->objfile
)->builtin_void
;
18655 return lookup_die_type (die
, type_attr
, cu
);
18658 /* True iff CU's producer generates GNAT Ada auxiliary information
18659 that allows to find parallel types through that information instead
18660 of having to do expensive parallel lookups by type name. */
18663 need_gnat_info (struct dwarf2_cu
*cu
)
18665 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18666 of GNAT produces this auxiliary information, without any indication
18667 that it is produced. Part of enhancing the FSF version of GNAT
18668 to produce that information will be to put in place an indicator
18669 that we can use in order to determine whether the descriptive type
18670 info is available or not. One suggestion that has been made is
18671 to use a new attribute, attached to the CU die. For now, assume
18672 that the descriptive type info is not available. */
18676 /* Return the auxiliary type of the die in question using its
18677 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18678 attribute is not present. */
18680 static struct type
*
18681 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18683 struct attribute
*type_attr
;
18685 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18689 return lookup_die_type (die
, type_attr
, cu
);
18692 /* If DIE has a descriptive_type attribute, then set the TYPE's
18693 descriptive type accordingly. */
18696 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18697 struct dwarf2_cu
*cu
)
18699 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18701 if (descriptive_type
)
18703 ALLOCATE_GNAT_AUX_TYPE (type
);
18704 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18708 /* Return the containing type of the die in question using its
18709 DW_AT_containing_type attribute. */
18711 static struct type
*
18712 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18714 struct attribute
*type_attr
;
18716 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18718 error (_("Dwarf Error: Problem turning containing type into gdb type "
18719 "[in module %s]"), objfile_name (cu
->objfile
));
18721 return lookup_die_type (die
, type_attr
, cu
);
18724 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18726 static struct type
*
18727 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18729 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18730 char *message
, *saved
;
18732 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18733 objfile_name (objfile
),
18734 cu
->header
.offset
.sect_off
,
18735 die
->offset
.sect_off
);
18736 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18737 message
, strlen (message
));
18740 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18743 /* Look up the type of DIE in CU using its type attribute ATTR.
18744 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18745 DW_AT_containing_type.
18746 If there is no type substitute an error marker. */
18748 static struct type
*
18749 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18750 struct dwarf2_cu
*cu
)
18752 struct objfile
*objfile
= cu
->objfile
;
18753 struct type
*this_type
;
18755 gdb_assert (attr
->name
== DW_AT_type
18756 || attr
->name
== DW_AT_GNAT_descriptive_type
18757 || attr
->name
== DW_AT_containing_type
);
18759 /* First see if we have it cached. */
18761 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18763 struct dwarf2_per_cu_data
*per_cu
;
18764 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18766 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18767 this_type
= get_die_type_at_offset (offset
, per_cu
);
18769 else if (attr_form_is_ref (attr
))
18771 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18773 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18775 else if (attr
->form
== DW_FORM_ref_sig8
)
18777 ULONGEST signature
= DW_SIGNATURE (attr
);
18779 return get_signatured_type (die
, signature
, cu
);
18783 complaint (&symfile_complaints
,
18784 _("Dwarf Error: Bad type attribute %s in DIE"
18785 " at 0x%x [in module %s]"),
18786 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18787 objfile_name (objfile
));
18788 return build_error_marker_type (cu
, die
);
18791 /* If not cached we need to read it in. */
18793 if (this_type
== NULL
)
18795 struct die_info
*type_die
= NULL
;
18796 struct dwarf2_cu
*type_cu
= cu
;
18798 if (attr_form_is_ref (attr
))
18799 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18800 if (type_die
== NULL
)
18801 return build_error_marker_type (cu
, die
);
18802 /* If we find the type now, it's probably because the type came
18803 from an inter-CU reference and the type's CU got expanded before
18805 this_type
= read_type_die (type_die
, type_cu
);
18808 /* If we still don't have a type use an error marker. */
18810 if (this_type
== NULL
)
18811 return build_error_marker_type (cu
, die
);
18816 /* Return the type in DIE, CU.
18817 Returns NULL for invalid types.
18819 This first does a lookup in die_type_hash,
18820 and only reads the die in if necessary.
18822 NOTE: This can be called when reading in partial or full symbols. */
18824 static struct type
*
18825 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18827 struct type
*this_type
;
18829 this_type
= get_die_type (die
, cu
);
18833 return read_type_die_1 (die
, cu
);
18836 /* Read the type in DIE, CU.
18837 Returns NULL for invalid types. */
18839 static struct type
*
18840 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18842 struct type
*this_type
= NULL
;
18846 case DW_TAG_class_type
:
18847 case DW_TAG_interface_type
:
18848 case DW_TAG_structure_type
:
18849 case DW_TAG_union_type
:
18850 this_type
= read_structure_type (die
, cu
);
18852 case DW_TAG_enumeration_type
:
18853 this_type
= read_enumeration_type (die
, cu
);
18855 case DW_TAG_subprogram
:
18856 case DW_TAG_subroutine_type
:
18857 case DW_TAG_inlined_subroutine
:
18858 this_type
= read_subroutine_type (die
, cu
);
18860 case DW_TAG_array_type
:
18861 this_type
= read_array_type (die
, cu
);
18863 case DW_TAG_set_type
:
18864 this_type
= read_set_type (die
, cu
);
18866 case DW_TAG_pointer_type
:
18867 this_type
= read_tag_pointer_type (die
, cu
);
18869 case DW_TAG_ptr_to_member_type
:
18870 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18872 case DW_TAG_reference_type
:
18873 this_type
= read_tag_reference_type (die
, cu
);
18875 case DW_TAG_const_type
:
18876 this_type
= read_tag_const_type (die
, cu
);
18878 case DW_TAG_volatile_type
:
18879 this_type
= read_tag_volatile_type (die
, cu
);
18881 case DW_TAG_restrict_type
:
18882 this_type
= read_tag_restrict_type (die
, cu
);
18884 case DW_TAG_string_type
:
18885 this_type
= read_tag_string_type (die
, cu
);
18887 case DW_TAG_typedef
:
18888 this_type
= read_typedef (die
, cu
);
18890 case DW_TAG_subrange_type
:
18891 this_type
= read_subrange_type (die
, cu
);
18893 case DW_TAG_base_type
:
18894 this_type
= read_base_type (die
, cu
);
18896 case DW_TAG_unspecified_type
:
18897 this_type
= read_unspecified_type (die
, cu
);
18899 case DW_TAG_namespace
:
18900 this_type
= read_namespace_type (die
, cu
);
18902 case DW_TAG_module
:
18903 this_type
= read_module_type (die
, cu
);
18905 case DW_TAG_atomic_type
:
18906 this_type
= read_tag_atomic_type (die
, cu
);
18909 complaint (&symfile_complaints
,
18910 _("unexpected tag in read_type_die: '%s'"),
18911 dwarf_tag_name (die
->tag
));
18918 /* See if we can figure out if the class lives in a namespace. We do
18919 this by looking for a member function; its demangled name will
18920 contain namespace info, if there is any.
18921 Return the computed name or NULL.
18922 Space for the result is allocated on the objfile's obstack.
18923 This is the full-die version of guess_partial_die_structure_name.
18924 In this case we know DIE has no useful parent. */
18927 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18929 struct die_info
*spec_die
;
18930 struct dwarf2_cu
*spec_cu
;
18931 struct die_info
*child
;
18934 spec_die
= die_specification (die
, &spec_cu
);
18935 if (spec_die
!= NULL
)
18941 for (child
= die
->child
;
18943 child
= child
->sibling
)
18945 if (child
->tag
== DW_TAG_subprogram
)
18947 struct attribute
*attr
;
18949 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18951 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
18955 = language_class_name_from_physname (cu
->language_defn
,
18959 if (actual_name
!= NULL
)
18961 const char *die_name
= dwarf2_name (die
, cu
);
18963 if (die_name
!= NULL
18964 && strcmp (die_name
, actual_name
) != 0)
18966 /* Strip off the class name from the full name.
18967 We want the prefix. */
18968 int die_name_len
= strlen (die_name
);
18969 int actual_name_len
= strlen (actual_name
);
18971 /* Test for '::' as a sanity check. */
18972 if (actual_name_len
> die_name_len
+ 2
18973 && actual_name
[actual_name_len
18974 - die_name_len
- 1] == ':')
18976 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
18978 actual_name_len
- die_name_len
- 2);
18981 xfree (actual_name
);
18990 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18991 prefix part in such case. See
18992 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18995 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18997 struct attribute
*attr
;
19000 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19001 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19004 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19005 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19008 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19010 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19011 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19014 /* dwarf2_name had to be already called. */
19015 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19017 /* Strip the base name, keep any leading namespaces/classes. */
19018 base
= strrchr (DW_STRING (attr
), ':');
19019 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19022 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19023 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
19026 /* Return the name of the namespace/class that DIE is defined within,
19027 or "" if we can't tell. The caller should not xfree the result.
19029 For example, if we're within the method foo() in the following
19039 then determine_prefix on foo's die will return "N::C". */
19041 static const char *
19042 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19044 struct die_info
*parent
, *spec_die
;
19045 struct dwarf2_cu
*spec_cu
;
19046 struct type
*parent_type
;
19049 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19050 && cu
->language
!= language_fortran
)
19053 retval
= anonymous_struct_prefix (die
, cu
);
19057 /* We have to be careful in the presence of DW_AT_specification.
19058 For example, with GCC 3.4, given the code
19062 // Definition of N::foo.
19066 then we'll have a tree of DIEs like this:
19068 1: DW_TAG_compile_unit
19069 2: DW_TAG_namespace // N
19070 3: DW_TAG_subprogram // declaration of N::foo
19071 4: DW_TAG_subprogram // definition of N::foo
19072 DW_AT_specification // refers to die #3
19074 Thus, when processing die #4, we have to pretend that we're in
19075 the context of its DW_AT_specification, namely the contex of die
19078 spec_die
= die_specification (die
, &spec_cu
);
19079 if (spec_die
== NULL
)
19080 parent
= die
->parent
;
19083 parent
= spec_die
->parent
;
19087 if (parent
== NULL
)
19089 else if (parent
->building_fullname
)
19092 const char *parent_name
;
19094 /* It has been seen on RealView 2.2 built binaries,
19095 DW_TAG_template_type_param types actually _defined_ as
19096 children of the parent class:
19099 template class <class Enum> Class{};
19100 Class<enum E> class_e;
19102 1: DW_TAG_class_type (Class)
19103 2: DW_TAG_enumeration_type (E)
19104 3: DW_TAG_enumerator (enum1:0)
19105 3: DW_TAG_enumerator (enum2:1)
19107 2: DW_TAG_template_type_param
19108 DW_AT_type DW_FORM_ref_udata (E)
19110 Besides being broken debug info, it can put GDB into an
19111 infinite loop. Consider:
19113 When we're building the full name for Class<E>, we'll start
19114 at Class, and go look over its template type parameters,
19115 finding E. We'll then try to build the full name of E, and
19116 reach here. We're now trying to build the full name of E,
19117 and look over the parent DIE for containing scope. In the
19118 broken case, if we followed the parent DIE of E, we'd again
19119 find Class, and once again go look at its template type
19120 arguments, etc., etc. Simply don't consider such parent die
19121 as source-level parent of this die (it can't be, the language
19122 doesn't allow it), and break the loop here. */
19123 name
= dwarf2_name (die
, cu
);
19124 parent_name
= dwarf2_name (parent
, cu
);
19125 complaint (&symfile_complaints
,
19126 _("template param type '%s' defined within parent '%s'"),
19127 name
? name
: "<unknown>",
19128 parent_name
? parent_name
: "<unknown>");
19132 switch (parent
->tag
)
19134 case DW_TAG_namespace
:
19135 parent_type
= read_type_die (parent
, cu
);
19136 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19137 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19138 Work around this problem here. */
19139 if (cu
->language
== language_cplus
19140 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19142 /* We give a name to even anonymous namespaces. */
19143 return TYPE_TAG_NAME (parent_type
);
19144 case DW_TAG_class_type
:
19145 case DW_TAG_interface_type
:
19146 case DW_TAG_structure_type
:
19147 case DW_TAG_union_type
:
19148 case DW_TAG_module
:
19149 parent_type
= read_type_die (parent
, cu
);
19150 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19151 return TYPE_TAG_NAME (parent_type
);
19153 /* An anonymous structure is only allowed non-static data
19154 members; no typedefs, no member functions, et cetera.
19155 So it does not need a prefix. */
19157 case DW_TAG_compile_unit
:
19158 case DW_TAG_partial_unit
:
19159 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19160 if (cu
->language
== language_cplus
19161 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19162 && die
->child
!= NULL
19163 && (die
->tag
== DW_TAG_class_type
19164 || die
->tag
== DW_TAG_structure_type
19165 || die
->tag
== DW_TAG_union_type
))
19167 char *name
= guess_full_die_structure_name (die
, cu
);
19172 case DW_TAG_enumeration_type
:
19173 parent_type
= read_type_die (parent
, cu
);
19174 if (TYPE_DECLARED_CLASS (parent_type
))
19176 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19177 return TYPE_TAG_NAME (parent_type
);
19180 /* Fall through. */
19182 return determine_prefix (parent
, cu
);
19186 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19187 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19188 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19189 an obconcat, otherwise allocate storage for the result. The CU argument is
19190 used to determine the language and hence, the appropriate separator. */
19192 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19195 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19196 int physname
, struct dwarf2_cu
*cu
)
19198 const char *lead
= "";
19201 if (suffix
== NULL
|| suffix
[0] == '\0'
19202 || prefix
== NULL
|| prefix
[0] == '\0')
19204 else if (cu
->language
== language_java
)
19206 else if (cu
->language
== language_fortran
&& physname
)
19208 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19209 DW_AT_MIPS_linkage_name is preferred and used instead. */
19217 if (prefix
== NULL
)
19219 if (suffix
== NULL
)
19225 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19227 strcpy (retval
, lead
);
19228 strcat (retval
, prefix
);
19229 strcat (retval
, sep
);
19230 strcat (retval
, suffix
);
19235 /* We have an obstack. */
19236 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19240 /* Return sibling of die, NULL if no sibling. */
19242 static struct die_info
*
19243 sibling_die (struct die_info
*die
)
19245 return die
->sibling
;
19248 /* Get name of a die, return NULL if not found. */
19250 static const char *
19251 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19252 struct obstack
*obstack
)
19254 if (name
&& cu
->language
== language_cplus
)
19256 char *canon_name
= cp_canonicalize_string (name
);
19258 if (canon_name
!= NULL
)
19260 if (strcmp (canon_name
, name
) != 0)
19261 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19262 xfree (canon_name
);
19269 /* Get name of a die, return NULL if not found.
19270 Anonymous namespaces are converted to their magic string. */
19272 static const char *
19273 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19275 struct attribute
*attr
;
19277 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19278 if ((!attr
|| !DW_STRING (attr
))
19279 && die
->tag
!= DW_TAG_namespace
19280 && die
->tag
!= DW_TAG_class_type
19281 && die
->tag
!= DW_TAG_interface_type
19282 && die
->tag
!= DW_TAG_structure_type
19283 && die
->tag
!= DW_TAG_union_type
)
19288 case DW_TAG_compile_unit
:
19289 case DW_TAG_partial_unit
:
19290 /* Compilation units have a DW_AT_name that is a filename, not
19291 a source language identifier. */
19292 case DW_TAG_enumeration_type
:
19293 case DW_TAG_enumerator
:
19294 /* These tags always have simple identifiers already; no need
19295 to canonicalize them. */
19296 return DW_STRING (attr
);
19298 case DW_TAG_namespace
:
19299 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19300 return DW_STRING (attr
);
19301 return CP_ANONYMOUS_NAMESPACE_STR
;
19303 case DW_TAG_subprogram
:
19304 /* Java constructors will all be named "<init>", so return
19305 the class name when we see this special case. */
19306 if (cu
->language
== language_java
19307 && DW_STRING (attr
) != NULL
19308 && strcmp (DW_STRING (attr
), "<init>") == 0)
19310 struct dwarf2_cu
*spec_cu
= cu
;
19311 struct die_info
*spec_die
;
19313 /* GCJ will output '<init>' for Java constructor names.
19314 For this special case, return the name of the parent class. */
19316 /* GCJ may output subprogram DIEs with AT_specification set.
19317 If so, use the name of the specified DIE. */
19318 spec_die
= die_specification (die
, &spec_cu
);
19319 if (spec_die
!= NULL
)
19320 return dwarf2_name (spec_die
, spec_cu
);
19325 if (die
->tag
== DW_TAG_class_type
)
19326 return dwarf2_name (die
, cu
);
19328 while (die
->tag
!= DW_TAG_compile_unit
19329 && die
->tag
!= DW_TAG_partial_unit
);
19333 case DW_TAG_class_type
:
19334 case DW_TAG_interface_type
:
19335 case DW_TAG_structure_type
:
19336 case DW_TAG_union_type
:
19337 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19338 structures or unions. These were of the form "._%d" in GCC 4.1,
19339 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19340 and GCC 4.4. We work around this problem by ignoring these. */
19341 if (attr
&& DW_STRING (attr
)
19342 && (strncmp (DW_STRING (attr
), "._", 2) == 0
19343 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
19346 /* GCC might emit a nameless typedef that has a linkage name. See
19347 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19348 if (!attr
|| DW_STRING (attr
) == NULL
)
19350 char *demangled
= NULL
;
19352 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19354 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19356 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19359 /* Avoid demangling DW_STRING (attr) the second time on a second
19360 call for the same DIE. */
19361 if (!DW_STRING_IS_CANONICAL (attr
))
19362 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19368 /* FIXME: we already did this for the partial symbol... */
19370 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19371 demangled
, strlen (demangled
));
19372 DW_STRING_IS_CANONICAL (attr
) = 1;
19375 /* Strip any leading namespaces/classes, keep only the base name.
19376 DW_AT_name for named DIEs does not contain the prefixes. */
19377 base
= strrchr (DW_STRING (attr
), ':');
19378 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19381 return DW_STRING (attr
);
19390 if (!DW_STRING_IS_CANONICAL (attr
))
19393 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19394 &cu
->objfile
->per_bfd
->storage_obstack
);
19395 DW_STRING_IS_CANONICAL (attr
) = 1;
19397 return DW_STRING (attr
);
19400 /* Return the die that this die in an extension of, or NULL if there
19401 is none. *EXT_CU is the CU containing DIE on input, and the CU
19402 containing the return value on output. */
19404 static struct die_info
*
19405 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19407 struct attribute
*attr
;
19409 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19413 return follow_die_ref (die
, attr
, ext_cu
);
19416 /* Convert a DIE tag into its string name. */
19418 static const char *
19419 dwarf_tag_name (unsigned tag
)
19421 const char *name
= get_DW_TAG_name (tag
);
19424 return "DW_TAG_<unknown>";
19429 /* Convert a DWARF attribute code into its string name. */
19431 static const char *
19432 dwarf_attr_name (unsigned attr
)
19436 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19437 if (attr
== DW_AT_MIPS_fde
)
19438 return "DW_AT_MIPS_fde";
19440 if (attr
== DW_AT_HP_block_index
)
19441 return "DW_AT_HP_block_index";
19444 name
= get_DW_AT_name (attr
);
19447 return "DW_AT_<unknown>";
19452 /* Convert a DWARF value form code into its string name. */
19454 static const char *
19455 dwarf_form_name (unsigned form
)
19457 const char *name
= get_DW_FORM_name (form
);
19460 return "DW_FORM_<unknown>";
19466 dwarf_bool_name (unsigned mybool
)
19474 /* Convert a DWARF type code into its string name. */
19476 static const char *
19477 dwarf_type_encoding_name (unsigned enc
)
19479 const char *name
= get_DW_ATE_name (enc
);
19482 return "DW_ATE_<unknown>";
19488 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19492 print_spaces (indent
, f
);
19493 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19494 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19496 if (die
->parent
!= NULL
)
19498 print_spaces (indent
, f
);
19499 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19500 die
->parent
->offset
.sect_off
);
19503 print_spaces (indent
, f
);
19504 fprintf_unfiltered (f
, " has children: %s\n",
19505 dwarf_bool_name (die
->child
!= NULL
));
19507 print_spaces (indent
, f
);
19508 fprintf_unfiltered (f
, " attributes:\n");
19510 for (i
= 0; i
< die
->num_attrs
; ++i
)
19512 print_spaces (indent
, f
);
19513 fprintf_unfiltered (f
, " %s (%s) ",
19514 dwarf_attr_name (die
->attrs
[i
].name
),
19515 dwarf_form_name (die
->attrs
[i
].form
));
19517 switch (die
->attrs
[i
].form
)
19520 case DW_FORM_GNU_addr_index
:
19521 fprintf_unfiltered (f
, "address: ");
19522 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19524 case DW_FORM_block2
:
19525 case DW_FORM_block4
:
19526 case DW_FORM_block
:
19527 case DW_FORM_block1
:
19528 fprintf_unfiltered (f
, "block: size %s",
19529 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19531 case DW_FORM_exprloc
:
19532 fprintf_unfiltered (f
, "expression: size %s",
19533 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19535 case DW_FORM_ref_addr
:
19536 fprintf_unfiltered (f
, "ref address: ");
19537 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19539 case DW_FORM_GNU_ref_alt
:
19540 fprintf_unfiltered (f
, "alt ref address: ");
19541 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19547 case DW_FORM_ref_udata
:
19548 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19549 (long) (DW_UNSND (&die
->attrs
[i
])));
19551 case DW_FORM_data1
:
19552 case DW_FORM_data2
:
19553 case DW_FORM_data4
:
19554 case DW_FORM_data8
:
19555 case DW_FORM_udata
:
19556 case DW_FORM_sdata
:
19557 fprintf_unfiltered (f
, "constant: %s",
19558 pulongest (DW_UNSND (&die
->attrs
[i
])));
19560 case DW_FORM_sec_offset
:
19561 fprintf_unfiltered (f
, "section offset: %s",
19562 pulongest (DW_UNSND (&die
->attrs
[i
])));
19564 case DW_FORM_ref_sig8
:
19565 fprintf_unfiltered (f
, "signature: %s",
19566 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19568 case DW_FORM_string
:
19570 case DW_FORM_GNU_str_index
:
19571 case DW_FORM_GNU_strp_alt
:
19572 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19573 DW_STRING (&die
->attrs
[i
])
19574 ? DW_STRING (&die
->attrs
[i
]) : "",
19575 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19578 if (DW_UNSND (&die
->attrs
[i
]))
19579 fprintf_unfiltered (f
, "flag: TRUE");
19581 fprintf_unfiltered (f
, "flag: FALSE");
19583 case DW_FORM_flag_present
:
19584 fprintf_unfiltered (f
, "flag: TRUE");
19586 case DW_FORM_indirect
:
19587 /* The reader will have reduced the indirect form to
19588 the "base form" so this form should not occur. */
19589 fprintf_unfiltered (f
,
19590 "unexpected attribute form: DW_FORM_indirect");
19593 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19594 die
->attrs
[i
].form
);
19597 fprintf_unfiltered (f
, "\n");
19602 dump_die_for_error (struct die_info
*die
)
19604 dump_die_shallow (gdb_stderr
, 0, die
);
19608 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19610 int indent
= level
* 4;
19612 gdb_assert (die
!= NULL
);
19614 if (level
>= max_level
)
19617 dump_die_shallow (f
, indent
, die
);
19619 if (die
->child
!= NULL
)
19621 print_spaces (indent
, f
);
19622 fprintf_unfiltered (f
, " Children:");
19623 if (level
+ 1 < max_level
)
19625 fprintf_unfiltered (f
, "\n");
19626 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19630 fprintf_unfiltered (f
,
19631 " [not printed, max nesting level reached]\n");
19635 if (die
->sibling
!= NULL
&& level
> 0)
19637 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19641 /* This is called from the pdie macro in gdbinit.in.
19642 It's not static so gcc will keep a copy callable from gdb. */
19645 dump_die (struct die_info
*die
, int max_level
)
19647 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19651 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19655 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19661 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19665 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19667 sect_offset retval
= { DW_UNSND (attr
) };
19669 if (attr_form_is_ref (attr
))
19672 retval
.sect_off
= 0;
19673 complaint (&symfile_complaints
,
19674 _("unsupported die ref attribute form: '%s'"),
19675 dwarf_form_name (attr
->form
));
19679 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19680 * the value held by the attribute is not constant. */
19683 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19685 if (attr
->form
== DW_FORM_sdata
)
19686 return DW_SND (attr
);
19687 else if (attr
->form
== DW_FORM_udata
19688 || attr
->form
== DW_FORM_data1
19689 || attr
->form
== DW_FORM_data2
19690 || attr
->form
== DW_FORM_data4
19691 || attr
->form
== DW_FORM_data8
)
19692 return DW_UNSND (attr
);
19695 complaint (&symfile_complaints
,
19696 _("Attribute value is not a constant (%s)"),
19697 dwarf_form_name (attr
->form
));
19698 return default_value
;
19702 /* Follow reference or signature attribute ATTR of SRC_DIE.
19703 On entry *REF_CU is the CU of SRC_DIE.
19704 On exit *REF_CU is the CU of the result. */
19706 static struct die_info
*
19707 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19708 struct dwarf2_cu
**ref_cu
)
19710 struct die_info
*die
;
19712 if (attr_form_is_ref (attr
))
19713 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19714 else if (attr
->form
== DW_FORM_ref_sig8
)
19715 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19718 dump_die_for_error (src_die
);
19719 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19720 objfile_name ((*ref_cu
)->objfile
));
19726 /* Follow reference OFFSET.
19727 On entry *REF_CU is the CU of the source die referencing OFFSET.
19728 On exit *REF_CU is the CU of the result.
19729 Returns NULL if OFFSET is invalid. */
19731 static struct die_info
*
19732 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19733 struct dwarf2_cu
**ref_cu
)
19735 struct die_info temp_die
;
19736 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19738 gdb_assert (cu
->per_cu
!= NULL
);
19742 if (cu
->per_cu
->is_debug_types
)
19744 /* .debug_types CUs cannot reference anything outside their CU.
19745 If they need to, they have to reference a signatured type via
19746 DW_FORM_ref_sig8. */
19747 if (! offset_in_cu_p (&cu
->header
, offset
))
19750 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19751 || ! offset_in_cu_p (&cu
->header
, offset
))
19753 struct dwarf2_per_cu_data
*per_cu
;
19755 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19758 /* If necessary, add it to the queue and load its DIEs. */
19759 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19760 load_full_comp_unit (per_cu
, cu
->language
);
19762 target_cu
= per_cu
->cu
;
19764 else if (cu
->dies
== NULL
)
19766 /* We're loading full DIEs during partial symbol reading. */
19767 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19768 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19771 *ref_cu
= target_cu
;
19772 temp_die
.offset
= offset
;
19773 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19776 /* Follow reference attribute ATTR of SRC_DIE.
19777 On entry *REF_CU is the CU of SRC_DIE.
19778 On exit *REF_CU is the CU of the result. */
19780 static struct die_info
*
19781 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19782 struct dwarf2_cu
**ref_cu
)
19784 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19785 struct dwarf2_cu
*cu
= *ref_cu
;
19786 struct die_info
*die
;
19788 die
= follow_die_offset (offset
,
19789 (attr
->form
== DW_FORM_GNU_ref_alt
19790 || cu
->per_cu
->is_dwz
),
19793 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19794 "at 0x%x [in module %s]"),
19795 offset
.sect_off
, src_die
->offset
.sect_off
,
19796 objfile_name (cu
->objfile
));
19801 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19802 Returned value is intended for DW_OP_call*. Returned
19803 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19805 struct dwarf2_locexpr_baton
19806 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19807 struct dwarf2_per_cu_data
*per_cu
,
19808 CORE_ADDR (*get_frame_pc
) (void *baton
),
19811 struct dwarf2_cu
*cu
;
19812 struct die_info
*die
;
19813 struct attribute
*attr
;
19814 struct dwarf2_locexpr_baton retval
;
19816 dw2_setup (per_cu
->objfile
);
19818 if (per_cu
->cu
== NULL
)
19822 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19824 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19825 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19827 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19830 /* DWARF: "If there is no such attribute, then there is no effect.".
19831 DATA is ignored if SIZE is 0. */
19833 retval
.data
= NULL
;
19836 else if (attr_form_is_section_offset (attr
))
19838 struct dwarf2_loclist_baton loclist_baton
;
19839 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19842 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19844 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19846 retval
.size
= size
;
19850 if (!attr_form_is_block (attr
))
19851 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19852 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19853 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19855 retval
.data
= DW_BLOCK (attr
)->data
;
19856 retval
.size
= DW_BLOCK (attr
)->size
;
19858 retval
.per_cu
= cu
->per_cu
;
19860 age_cached_comp_units ();
19865 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19868 struct dwarf2_locexpr_baton
19869 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19870 struct dwarf2_per_cu_data
*per_cu
,
19871 CORE_ADDR (*get_frame_pc
) (void *baton
),
19874 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19876 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19879 /* Write a constant of a given type as target-ordered bytes into
19882 static const gdb_byte
*
19883 write_constant_as_bytes (struct obstack
*obstack
,
19884 enum bfd_endian byte_order
,
19891 *len
= TYPE_LENGTH (type
);
19892 result
= obstack_alloc (obstack
, *len
);
19893 store_unsigned_integer (result
, *len
, byte_order
, value
);
19898 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19899 pointer to the constant bytes and set LEN to the length of the
19900 data. If memory is needed, allocate it on OBSTACK. If the DIE
19901 does not have a DW_AT_const_value, return NULL. */
19904 dwarf2_fetch_constant_bytes (sect_offset offset
,
19905 struct dwarf2_per_cu_data
*per_cu
,
19906 struct obstack
*obstack
,
19909 struct dwarf2_cu
*cu
;
19910 struct die_info
*die
;
19911 struct attribute
*attr
;
19912 const gdb_byte
*result
= NULL
;
19915 enum bfd_endian byte_order
;
19917 dw2_setup (per_cu
->objfile
);
19919 if (per_cu
->cu
== NULL
)
19923 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19925 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19926 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19929 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19933 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19934 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19936 switch (attr
->form
)
19939 case DW_FORM_GNU_addr_index
:
19943 *len
= cu
->header
.addr_size
;
19944 tem
= obstack_alloc (obstack
, *len
);
19945 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19949 case DW_FORM_string
:
19951 case DW_FORM_GNU_str_index
:
19952 case DW_FORM_GNU_strp_alt
:
19953 /* DW_STRING is already allocated on the objfile obstack, point
19955 result
= (const gdb_byte
*) DW_STRING (attr
);
19956 *len
= strlen (DW_STRING (attr
));
19958 case DW_FORM_block1
:
19959 case DW_FORM_block2
:
19960 case DW_FORM_block4
:
19961 case DW_FORM_block
:
19962 case DW_FORM_exprloc
:
19963 result
= DW_BLOCK (attr
)->data
;
19964 *len
= DW_BLOCK (attr
)->size
;
19967 /* The DW_AT_const_value attributes are supposed to carry the
19968 symbol's value "represented as it would be on the target
19969 architecture." By the time we get here, it's already been
19970 converted to host endianness, so we just need to sign- or
19971 zero-extend it as appropriate. */
19972 case DW_FORM_data1
:
19973 type
= die_type (die
, cu
);
19974 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
19975 if (result
== NULL
)
19976 result
= write_constant_as_bytes (obstack
, byte_order
,
19979 case DW_FORM_data2
:
19980 type
= die_type (die
, cu
);
19981 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
19982 if (result
== NULL
)
19983 result
= write_constant_as_bytes (obstack
, byte_order
,
19986 case DW_FORM_data4
:
19987 type
= die_type (die
, cu
);
19988 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
19989 if (result
== NULL
)
19990 result
= write_constant_as_bytes (obstack
, byte_order
,
19993 case DW_FORM_data8
:
19994 type
= die_type (die
, cu
);
19995 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
19996 if (result
== NULL
)
19997 result
= write_constant_as_bytes (obstack
, byte_order
,
20001 case DW_FORM_sdata
:
20002 type
= die_type (die
, cu
);
20003 result
= write_constant_as_bytes (obstack
, byte_order
,
20004 type
, DW_SND (attr
), len
);
20007 case DW_FORM_udata
:
20008 type
= die_type (die
, cu
);
20009 result
= write_constant_as_bytes (obstack
, byte_order
,
20010 type
, DW_UNSND (attr
), len
);
20014 complaint (&symfile_complaints
,
20015 _("unsupported const value attribute form: '%s'"),
20016 dwarf_form_name (attr
->form
));
20023 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20027 dwarf2_get_die_type (cu_offset die_offset
,
20028 struct dwarf2_per_cu_data
*per_cu
)
20030 sect_offset die_offset_sect
;
20032 dw2_setup (per_cu
->objfile
);
20034 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20035 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20038 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20039 On entry *REF_CU is the CU of SRC_DIE.
20040 On exit *REF_CU is the CU of the result.
20041 Returns NULL if the referenced DIE isn't found. */
20043 static struct die_info
*
20044 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20045 struct dwarf2_cu
**ref_cu
)
20047 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20048 struct die_info temp_die
;
20049 struct dwarf2_cu
*sig_cu
;
20050 struct die_info
*die
;
20052 /* While it might be nice to assert sig_type->type == NULL here,
20053 we can get here for DW_AT_imported_declaration where we need
20054 the DIE not the type. */
20056 /* If necessary, add it to the queue and load its DIEs. */
20058 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20059 read_signatured_type (sig_type
);
20061 sig_cu
= sig_type
->per_cu
.cu
;
20062 gdb_assert (sig_cu
!= NULL
);
20063 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20064 temp_die
.offset
= sig_type
->type_offset_in_section
;
20065 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20066 temp_die
.offset
.sect_off
);
20069 /* For .gdb_index version 7 keep track of included TUs.
20070 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20071 if (dwarf2_per_objfile
->index_table
!= NULL
20072 && dwarf2_per_objfile
->index_table
->version
<= 7)
20074 VEC_safe_push (dwarf2_per_cu_ptr
,
20075 (*ref_cu
)->per_cu
->imported_symtabs
,
20086 /* Follow signatured type referenced by ATTR in SRC_DIE.
20087 On entry *REF_CU is the CU of SRC_DIE.
20088 On exit *REF_CU is the CU of the result.
20089 The result is the DIE of the type.
20090 If the referenced type cannot be found an error is thrown. */
20092 static struct die_info
*
20093 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20094 struct dwarf2_cu
**ref_cu
)
20096 ULONGEST signature
= DW_SIGNATURE (attr
);
20097 struct signatured_type
*sig_type
;
20098 struct die_info
*die
;
20100 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20102 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20103 /* sig_type will be NULL if the signatured type is missing from
20105 if (sig_type
== NULL
)
20107 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20108 " from DIE at 0x%x [in module %s]"),
20109 hex_string (signature
), src_die
->offset
.sect_off
,
20110 objfile_name ((*ref_cu
)->objfile
));
20113 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20116 dump_die_for_error (src_die
);
20117 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20118 " from DIE at 0x%x [in module %s]"),
20119 hex_string (signature
), src_die
->offset
.sect_off
,
20120 objfile_name ((*ref_cu
)->objfile
));
20126 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20127 reading in and processing the type unit if necessary. */
20129 static struct type
*
20130 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20131 struct dwarf2_cu
*cu
)
20133 struct signatured_type
*sig_type
;
20134 struct dwarf2_cu
*type_cu
;
20135 struct die_info
*type_die
;
20138 sig_type
= lookup_signatured_type (cu
, signature
);
20139 /* sig_type will be NULL if the signatured type is missing from
20141 if (sig_type
== NULL
)
20143 complaint (&symfile_complaints
,
20144 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20145 " from DIE at 0x%x [in module %s]"),
20146 hex_string (signature
), die
->offset
.sect_off
,
20147 objfile_name (dwarf2_per_objfile
->objfile
));
20148 return build_error_marker_type (cu
, die
);
20151 /* If we already know the type we're done. */
20152 if (sig_type
->type
!= NULL
)
20153 return sig_type
->type
;
20156 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20157 if (type_die
!= NULL
)
20159 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20160 is created. This is important, for example, because for c++ classes
20161 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20162 type
= read_type_die (type_die
, type_cu
);
20165 complaint (&symfile_complaints
,
20166 _("Dwarf Error: Cannot build signatured type %s"
20167 " referenced from DIE at 0x%x [in module %s]"),
20168 hex_string (signature
), die
->offset
.sect_off
,
20169 objfile_name (dwarf2_per_objfile
->objfile
));
20170 type
= build_error_marker_type (cu
, die
);
20175 complaint (&symfile_complaints
,
20176 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20177 " from DIE at 0x%x [in module %s]"),
20178 hex_string (signature
), die
->offset
.sect_off
,
20179 objfile_name (dwarf2_per_objfile
->objfile
));
20180 type
= build_error_marker_type (cu
, die
);
20182 sig_type
->type
= type
;
20187 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20188 reading in and processing the type unit if necessary. */
20190 static struct type
*
20191 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20192 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20194 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20195 if (attr_form_is_ref (attr
))
20197 struct dwarf2_cu
*type_cu
= cu
;
20198 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20200 return read_type_die (type_die
, type_cu
);
20202 else if (attr
->form
== DW_FORM_ref_sig8
)
20204 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20208 complaint (&symfile_complaints
,
20209 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20210 " at 0x%x [in module %s]"),
20211 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20212 objfile_name (dwarf2_per_objfile
->objfile
));
20213 return build_error_marker_type (cu
, die
);
20217 /* Load the DIEs associated with type unit PER_CU into memory. */
20220 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20222 struct signatured_type
*sig_type
;
20224 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20225 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20227 /* We have the per_cu, but we need the signatured_type.
20228 Fortunately this is an easy translation. */
20229 gdb_assert (per_cu
->is_debug_types
);
20230 sig_type
= (struct signatured_type
*) per_cu
;
20232 gdb_assert (per_cu
->cu
== NULL
);
20234 read_signatured_type (sig_type
);
20236 gdb_assert (per_cu
->cu
!= NULL
);
20239 /* die_reader_func for read_signatured_type.
20240 This is identical to load_full_comp_unit_reader,
20241 but is kept separate for now. */
20244 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20245 const gdb_byte
*info_ptr
,
20246 struct die_info
*comp_unit_die
,
20250 struct dwarf2_cu
*cu
= reader
->cu
;
20252 gdb_assert (cu
->die_hash
== NULL
);
20254 htab_create_alloc_ex (cu
->header
.length
/ 12,
20258 &cu
->comp_unit_obstack
,
20259 hashtab_obstack_allocate
,
20260 dummy_obstack_deallocate
);
20263 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20264 &info_ptr
, comp_unit_die
);
20265 cu
->dies
= comp_unit_die
;
20266 /* comp_unit_die is not stored in die_hash, no need. */
20268 /* We try not to read any attributes in this function, because not
20269 all CUs needed for references have been loaded yet, and symbol
20270 table processing isn't initialized. But we have to set the CU language,
20271 or we won't be able to build types correctly.
20272 Similarly, if we do not read the producer, we can not apply
20273 producer-specific interpretation. */
20274 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20277 /* Read in a signatured type and build its CU and DIEs.
20278 If the type is a stub for the real type in a DWO file,
20279 read in the real type from the DWO file as well. */
20282 read_signatured_type (struct signatured_type
*sig_type
)
20284 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20286 gdb_assert (per_cu
->is_debug_types
);
20287 gdb_assert (per_cu
->cu
== NULL
);
20289 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20290 read_signatured_type_reader
, NULL
);
20291 sig_type
->per_cu
.tu_read
= 1;
20294 /* Decode simple location descriptions.
20295 Given a pointer to a dwarf block that defines a location, compute
20296 the location and return the value.
20298 NOTE drow/2003-11-18: This function is called in two situations
20299 now: for the address of static or global variables (partial symbols
20300 only) and for offsets into structures which are expected to be
20301 (more or less) constant. The partial symbol case should go away,
20302 and only the constant case should remain. That will let this
20303 function complain more accurately. A few special modes are allowed
20304 without complaint for global variables (for instance, global
20305 register values and thread-local values).
20307 A location description containing no operations indicates that the
20308 object is optimized out. The return value is 0 for that case.
20309 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20310 callers will only want a very basic result and this can become a
20313 Note that stack[0] is unused except as a default error return. */
20316 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20318 struct objfile
*objfile
= cu
->objfile
;
20320 size_t size
= blk
->size
;
20321 const gdb_byte
*data
= blk
->data
;
20322 CORE_ADDR stack
[64];
20324 unsigned int bytes_read
, unsnd
;
20330 stack
[++stacki
] = 0;
20369 stack
[++stacki
] = op
- DW_OP_lit0
;
20404 stack
[++stacki
] = op
- DW_OP_reg0
;
20406 dwarf2_complex_location_expr_complaint ();
20410 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20412 stack
[++stacki
] = unsnd
;
20414 dwarf2_complex_location_expr_complaint ();
20418 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20423 case DW_OP_const1u
:
20424 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20428 case DW_OP_const1s
:
20429 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20433 case DW_OP_const2u
:
20434 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20438 case DW_OP_const2s
:
20439 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20443 case DW_OP_const4u
:
20444 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20448 case DW_OP_const4s
:
20449 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20453 case DW_OP_const8u
:
20454 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20459 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20465 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20470 stack
[stacki
+ 1] = stack
[stacki
];
20475 stack
[stacki
- 1] += stack
[stacki
];
20479 case DW_OP_plus_uconst
:
20480 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20486 stack
[stacki
- 1] -= stack
[stacki
];
20491 /* If we're not the last op, then we definitely can't encode
20492 this using GDB's address_class enum. This is valid for partial
20493 global symbols, although the variable's address will be bogus
20496 dwarf2_complex_location_expr_complaint ();
20499 case DW_OP_GNU_push_tls_address
:
20500 /* The top of the stack has the offset from the beginning
20501 of the thread control block at which the variable is located. */
20502 /* Nothing should follow this operator, so the top of stack would
20504 /* This is valid for partial global symbols, but the variable's
20505 address will be bogus in the psymtab. Make it always at least
20506 non-zero to not look as a variable garbage collected by linker
20507 which have DW_OP_addr 0. */
20509 dwarf2_complex_location_expr_complaint ();
20513 case DW_OP_GNU_uninit
:
20516 case DW_OP_GNU_addr_index
:
20517 case DW_OP_GNU_const_index
:
20518 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20525 const char *name
= get_DW_OP_name (op
);
20528 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20531 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20535 return (stack
[stacki
]);
20538 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20539 outside of the allocated space. Also enforce minimum>0. */
20540 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20542 complaint (&symfile_complaints
,
20543 _("location description stack overflow"));
20549 complaint (&symfile_complaints
,
20550 _("location description stack underflow"));
20554 return (stack
[stacki
]);
20557 /* memory allocation interface */
20559 static struct dwarf_block
*
20560 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20562 struct dwarf_block
*blk
;
20564 blk
= (struct dwarf_block
*)
20565 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20569 static struct die_info
*
20570 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20572 struct die_info
*die
;
20573 size_t size
= sizeof (struct die_info
);
20576 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20578 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20579 memset (die
, 0, sizeof (struct die_info
));
20584 /* Macro support. */
20586 /* Return file name relative to the compilation directory of file number I in
20587 *LH's file name table. The result is allocated using xmalloc; the caller is
20588 responsible for freeing it. */
20591 file_file_name (int file
, struct line_header
*lh
)
20593 /* Is the file number a valid index into the line header's file name
20594 table? Remember that file numbers start with one, not zero. */
20595 if (1 <= file
&& file
<= lh
->num_file_names
)
20597 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20599 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
20600 return xstrdup (fe
->name
);
20601 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20606 /* The compiler produced a bogus file number. We can at least
20607 record the macro definitions made in the file, even if we
20608 won't be able to find the file by name. */
20609 char fake_name
[80];
20611 xsnprintf (fake_name
, sizeof (fake_name
),
20612 "<bad macro file number %d>", file
);
20614 complaint (&symfile_complaints
,
20615 _("bad file number in macro information (%d)"),
20618 return xstrdup (fake_name
);
20622 /* Return the full name of file number I in *LH's file name table.
20623 Use COMP_DIR as the name of the current directory of the
20624 compilation. The result is allocated using xmalloc; the caller is
20625 responsible for freeing it. */
20627 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20629 /* Is the file number a valid index into the line header's file name
20630 table? Remember that file numbers start with one, not zero. */
20631 if (1 <= file
&& file
<= lh
->num_file_names
)
20633 char *relative
= file_file_name (file
, lh
);
20635 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20637 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20640 return file_file_name (file
, lh
);
20644 static struct macro_source_file
*
20645 macro_start_file (int file
, int line
,
20646 struct macro_source_file
*current_file
,
20647 struct line_header
*lh
)
20649 /* File name relative to the compilation directory of this source file. */
20650 char *file_name
= file_file_name (file
, lh
);
20652 if (! current_file
)
20654 /* Note: We don't create a macro table for this compilation unit
20655 at all until we actually get a filename. */
20656 struct macro_table
*macro_table
= get_macro_table ();
20658 /* If we have no current file, then this must be the start_file
20659 directive for the compilation unit's main source file. */
20660 current_file
= macro_set_main (macro_table
, file_name
);
20661 macro_define_special (macro_table
);
20664 current_file
= macro_include (current_file
, line
, file_name
);
20668 return current_file
;
20672 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20673 followed by a null byte. */
20675 copy_string (const char *buf
, int len
)
20677 char *s
= xmalloc (len
+ 1);
20679 memcpy (s
, buf
, len
);
20685 static const char *
20686 consume_improper_spaces (const char *p
, const char *body
)
20690 complaint (&symfile_complaints
,
20691 _("macro definition contains spaces "
20692 "in formal argument list:\n`%s'"),
20704 parse_macro_definition (struct macro_source_file
*file
, int line
,
20709 /* The body string takes one of two forms. For object-like macro
20710 definitions, it should be:
20712 <macro name> " " <definition>
20714 For function-like macro definitions, it should be:
20716 <macro name> "() " <definition>
20718 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20720 Spaces may appear only where explicitly indicated, and in the
20723 The Dwarf 2 spec says that an object-like macro's name is always
20724 followed by a space, but versions of GCC around March 2002 omit
20725 the space when the macro's definition is the empty string.
20727 The Dwarf 2 spec says that there should be no spaces between the
20728 formal arguments in a function-like macro's formal argument list,
20729 but versions of GCC around March 2002 include spaces after the
20733 /* Find the extent of the macro name. The macro name is terminated
20734 by either a space or null character (for an object-like macro) or
20735 an opening paren (for a function-like macro). */
20736 for (p
= body
; *p
; p
++)
20737 if (*p
== ' ' || *p
== '(')
20740 if (*p
== ' ' || *p
== '\0')
20742 /* It's an object-like macro. */
20743 int name_len
= p
- body
;
20744 char *name
= copy_string (body
, name_len
);
20745 const char *replacement
;
20748 replacement
= body
+ name_len
+ 1;
20751 dwarf2_macro_malformed_definition_complaint (body
);
20752 replacement
= body
+ name_len
;
20755 macro_define_object (file
, line
, name
, replacement
);
20759 else if (*p
== '(')
20761 /* It's a function-like macro. */
20762 char *name
= copy_string (body
, p
- body
);
20765 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20769 p
= consume_improper_spaces (p
, body
);
20771 /* Parse the formal argument list. */
20772 while (*p
&& *p
!= ')')
20774 /* Find the extent of the current argument name. */
20775 const char *arg_start
= p
;
20777 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20780 if (! *p
|| p
== arg_start
)
20781 dwarf2_macro_malformed_definition_complaint (body
);
20784 /* Make sure argv has room for the new argument. */
20785 if (argc
>= argv_size
)
20788 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20791 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20794 p
= consume_improper_spaces (p
, body
);
20796 /* Consume the comma, if present. */
20801 p
= consume_improper_spaces (p
, body
);
20810 /* Perfectly formed definition, no complaints. */
20811 macro_define_function (file
, line
, name
,
20812 argc
, (const char **) argv
,
20814 else if (*p
== '\0')
20816 /* Complain, but do define it. */
20817 dwarf2_macro_malformed_definition_complaint (body
);
20818 macro_define_function (file
, line
, name
,
20819 argc
, (const char **) argv
,
20823 /* Just complain. */
20824 dwarf2_macro_malformed_definition_complaint (body
);
20827 /* Just complain. */
20828 dwarf2_macro_malformed_definition_complaint (body
);
20834 for (i
= 0; i
< argc
; i
++)
20840 dwarf2_macro_malformed_definition_complaint (body
);
20843 /* Skip some bytes from BYTES according to the form given in FORM.
20844 Returns the new pointer. */
20846 static const gdb_byte
*
20847 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20848 enum dwarf_form form
,
20849 unsigned int offset_size
,
20850 struct dwarf2_section_info
*section
)
20852 unsigned int bytes_read
;
20856 case DW_FORM_data1
:
20861 case DW_FORM_data2
:
20865 case DW_FORM_data4
:
20869 case DW_FORM_data8
:
20873 case DW_FORM_string
:
20874 read_direct_string (abfd
, bytes
, &bytes_read
);
20875 bytes
+= bytes_read
;
20878 case DW_FORM_sec_offset
:
20880 case DW_FORM_GNU_strp_alt
:
20881 bytes
+= offset_size
;
20884 case DW_FORM_block
:
20885 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20886 bytes
+= bytes_read
;
20889 case DW_FORM_block1
:
20890 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20892 case DW_FORM_block2
:
20893 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20895 case DW_FORM_block4
:
20896 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20899 case DW_FORM_sdata
:
20900 case DW_FORM_udata
:
20901 case DW_FORM_GNU_addr_index
:
20902 case DW_FORM_GNU_str_index
:
20903 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20906 dwarf2_section_buffer_overflow_complaint (section
);
20914 complaint (&symfile_complaints
,
20915 _("invalid form 0x%x in `%s'"),
20916 form
, get_section_name (section
));
20924 /* A helper for dwarf_decode_macros that handles skipping an unknown
20925 opcode. Returns an updated pointer to the macro data buffer; or,
20926 on error, issues a complaint and returns NULL. */
20928 static const gdb_byte
*
20929 skip_unknown_opcode (unsigned int opcode
,
20930 const gdb_byte
**opcode_definitions
,
20931 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20933 unsigned int offset_size
,
20934 struct dwarf2_section_info
*section
)
20936 unsigned int bytes_read
, i
;
20938 const gdb_byte
*defn
;
20940 if (opcode_definitions
[opcode
] == NULL
)
20942 complaint (&symfile_complaints
,
20943 _("unrecognized DW_MACFINO opcode 0x%x"),
20948 defn
= opcode_definitions
[opcode
];
20949 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20950 defn
+= bytes_read
;
20952 for (i
= 0; i
< arg
; ++i
)
20954 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
20956 if (mac_ptr
== NULL
)
20958 /* skip_form_bytes already issued the complaint. */
20966 /* A helper function which parses the header of a macro section.
20967 If the macro section is the extended (for now called "GNU") type,
20968 then this updates *OFFSET_SIZE. Returns a pointer to just after
20969 the header, or issues a complaint and returns NULL on error. */
20971 static const gdb_byte
*
20972 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
20974 const gdb_byte
*mac_ptr
,
20975 unsigned int *offset_size
,
20976 int section_is_gnu
)
20978 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
20980 if (section_is_gnu
)
20982 unsigned int version
, flags
;
20984 version
= read_2_bytes (abfd
, mac_ptr
);
20987 complaint (&symfile_complaints
,
20988 _("unrecognized version `%d' in .debug_macro section"),
20994 flags
= read_1_byte (abfd
, mac_ptr
);
20996 *offset_size
= (flags
& 1) ? 8 : 4;
20998 if ((flags
& 2) != 0)
20999 /* We don't need the line table offset. */
21000 mac_ptr
+= *offset_size
;
21002 /* Vendor opcode descriptions. */
21003 if ((flags
& 4) != 0)
21005 unsigned int i
, count
;
21007 count
= read_1_byte (abfd
, mac_ptr
);
21009 for (i
= 0; i
< count
; ++i
)
21011 unsigned int opcode
, bytes_read
;
21014 opcode
= read_1_byte (abfd
, mac_ptr
);
21016 opcode_definitions
[opcode
] = mac_ptr
;
21017 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21018 mac_ptr
+= bytes_read
;
21027 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21028 including DW_MACRO_GNU_transparent_include. */
21031 dwarf_decode_macro_bytes (bfd
*abfd
,
21032 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21033 struct macro_source_file
*current_file
,
21034 struct line_header
*lh
,
21035 struct dwarf2_section_info
*section
,
21036 int section_is_gnu
, int section_is_dwz
,
21037 unsigned int offset_size
,
21038 htab_t include_hash
)
21040 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21041 enum dwarf_macro_record_type macinfo_type
;
21042 int at_commandline
;
21043 const gdb_byte
*opcode_definitions
[256];
21045 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21046 &offset_size
, section_is_gnu
);
21047 if (mac_ptr
== NULL
)
21049 /* We already issued a complaint. */
21053 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21054 GDB is still reading the definitions from command line. First
21055 DW_MACINFO_start_file will need to be ignored as it was already executed
21056 to create CURRENT_FILE for the main source holding also the command line
21057 definitions. On first met DW_MACINFO_start_file this flag is reset to
21058 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21060 at_commandline
= 1;
21064 /* Do we at least have room for a macinfo type byte? */
21065 if (mac_ptr
>= mac_end
)
21067 dwarf2_section_buffer_overflow_complaint (section
);
21071 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21074 /* Note that we rely on the fact that the corresponding GNU and
21075 DWARF constants are the same. */
21076 switch (macinfo_type
)
21078 /* A zero macinfo type indicates the end of the macro
21083 case DW_MACRO_GNU_define
:
21084 case DW_MACRO_GNU_undef
:
21085 case DW_MACRO_GNU_define_indirect
:
21086 case DW_MACRO_GNU_undef_indirect
:
21087 case DW_MACRO_GNU_define_indirect_alt
:
21088 case DW_MACRO_GNU_undef_indirect_alt
:
21090 unsigned int bytes_read
;
21095 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21096 mac_ptr
+= bytes_read
;
21098 if (macinfo_type
== DW_MACRO_GNU_define
21099 || macinfo_type
== DW_MACRO_GNU_undef
)
21101 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21102 mac_ptr
+= bytes_read
;
21106 LONGEST str_offset
;
21108 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21109 mac_ptr
+= offset_size
;
21111 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21112 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21115 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21117 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21120 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21123 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21124 || macinfo_type
== DW_MACRO_GNU_define_indirect
21125 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21126 if (! current_file
)
21128 /* DWARF violation as no main source is present. */
21129 complaint (&symfile_complaints
,
21130 _("debug info with no main source gives macro %s "
21132 is_define
? _("definition") : _("undefinition"),
21136 if ((line
== 0 && !at_commandline
)
21137 || (line
!= 0 && at_commandline
))
21138 complaint (&symfile_complaints
,
21139 _("debug info gives %s macro %s with %s line %d: %s"),
21140 at_commandline
? _("command-line") : _("in-file"),
21141 is_define
? _("definition") : _("undefinition"),
21142 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21145 parse_macro_definition (current_file
, line
, body
);
21148 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21149 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21150 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21151 macro_undef (current_file
, line
, body
);
21156 case DW_MACRO_GNU_start_file
:
21158 unsigned int bytes_read
;
21161 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21162 mac_ptr
+= bytes_read
;
21163 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21164 mac_ptr
+= bytes_read
;
21166 if ((line
== 0 && !at_commandline
)
21167 || (line
!= 0 && at_commandline
))
21168 complaint (&symfile_complaints
,
21169 _("debug info gives source %d included "
21170 "from %s at %s line %d"),
21171 file
, at_commandline
? _("command-line") : _("file"),
21172 line
== 0 ? _("zero") : _("non-zero"), line
);
21174 if (at_commandline
)
21176 /* This DW_MACRO_GNU_start_file was executed in the
21178 at_commandline
= 0;
21181 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21185 case DW_MACRO_GNU_end_file
:
21186 if (! current_file
)
21187 complaint (&symfile_complaints
,
21188 _("macro debug info has an unmatched "
21189 "`close_file' directive"));
21192 current_file
= current_file
->included_by
;
21193 if (! current_file
)
21195 enum dwarf_macro_record_type next_type
;
21197 /* GCC circa March 2002 doesn't produce the zero
21198 type byte marking the end of the compilation
21199 unit. Complain if it's not there, but exit no
21202 /* Do we at least have room for a macinfo type byte? */
21203 if (mac_ptr
>= mac_end
)
21205 dwarf2_section_buffer_overflow_complaint (section
);
21209 /* We don't increment mac_ptr here, so this is just
21211 next_type
= read_1_byte (abfd
, mac_ptr
);
21212 if (next_type
!= 0)
21213 complaint (&symfile_complaints
,
21214 _("no terminating 0-type entry for "
21215 "macros in `.debug_macinfo' section"));
21222 case DW_MACRO_GNU_transparent_include
:
21223 case DW_MACRO_GNU_transparent_include_alt
:
21227 bfd
*include_bfd
= abfd
;
21228 struct dwarf2_section_info
*include_section
= section
;
21229 struct dwarf2_section_info alt_section
;
21230 const gdb_byte
*include_mac_end
= mac_end
;
21231 int is_dwz
= section_is_dwz
;
21232 const gdb_byte
*new_mac_ptr
;
21234 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21235 mac_ptr
+= offset_size
;
21237 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21239 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21241 dwarf2_read_section (objfile
, &dwz
->macro
);
21243 include_section
= &dwz
->macro
;
21244 include_bfd
= get_section_bfd_owner (include_section
);
21245 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21249 new_mac_ptr
= include_section
->buffer
+ offset
;
21250 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21254 /* This has actually happened; see
21255 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21256 complaint (&symfile_complaints
,
21257 _("recursive DW_MACRO_GNU_transparent_include in "
21258 ".debug_macro section"));
21262 *slot
= (void *) new_mac_ptr
;
21264 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21265 include_mac_end
, current_file
, lh
,
21266 section
, section_is_gnu
, is_dwz
,
21267 offset_size
, include_hash
);
21269 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21274 case DW_MACINFO_vendor_ext
:
21275 if (!section_is_gnu
)
21277 unsigned int bytes_read
;
21280 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21281 mac_ptr
+= bytes_read
;
21282 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21283 mac_ptr
+= bytes_read
;
21285 /* We don't recognize any vendor extensions. */
21291 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21292 mac_ptr
, mac_end
, abfd
, offset_size
,
21294 if (mac_ptr
== NULL
)
21298 } while (macinfo_type
!= 0);
21302 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21303 int section_is_gnu
)
21305 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21306 struct line_header
*lh
= cu
->line_header
;
21308 const gdb_byte
*mac_ptr
, *mac_end
;
21309 struct macro_source_file
*current_file
= 0;
21310 enum dwarf_macro_record_type macinfo_type
;
21311 unsigned int offset_size
= cu
->header
.offset_size
;
21312 const gdb_byte
*opcode_definitions
[256];
21313 struct cleanup
*cleanup
;
21314 htab_t include_hash
;
21316 struct dwarf2_section_info
*section
;
21317 const char *section_name
;
21319 if (cu
->dwo_unit
!= NULL
)
21321 if (section_is_gnu
)
21323 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21324 section_name
= ".debug_macro.dwo";
21328 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21329 section_name
= ".debug_macinfo.dwo";
21334 if (section_is_gnu
)
21336 section
= &dwarf2_per_objfile
->macro
;
21337 section_name
= ".debug_macro";
21341 section
= &dwarf2_per_objfile
->macinfo
;
21342 section_name
= ".debug_macinfo";
21346 dwarf2_read_section (objfile
, section
);
21347 if (section
->buffer
== NULL
)
21349 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21352 abfd
= get_section_bfd_owner (section
);
21354 /* First pass: Find the name of the base filename.
21355 This filename is needed in order to process all macros whose definition
21356 (or undefinition) comes from the command line. These macros are defined
21357 before the first DW_MACINFO_start_file entry, and yet still need to be
21358 associated to the base file.
21360 To determine the base file name, we scan the macro definitions until we
21361 reach the first DW_MACINFO_start_file entry. We then initialize
21362 CURRENT_FILE accordingly so that any macro definition found before the
21363 first DW_MACINFO_start_file can still be associated to the base file. */
21365 mac_ptr
= section
->buffer
+ offset
;
21366 mac_end
= section
->buffer
+ section
->size
;
21368 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21369 &offset_size
, section_is_gnu
);
21370 if (mac_ptr
== NULL
)
21372 /* We already issued a complaint. */
21378 /* Do we at least have room for a macinfo type byte? */
21379 if (mac_ptr
>= mac_end
)
21381 /* Complaint is printed during the second pass as GDB will probably
21382 stop the first pass earlier upon finding
21383 DW_MACINFO_start_file. */
21387 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21390 /* Note that we rely on the fact that the corresponding GNU and
21391 DWARF constants are the same. */
21392 switch (macinfo_type
)
21394 /* A zero macinfo type indicates the end of the macro
21399 case DW_MACRO_GNU_define
:
21400 case DW_MACRO_GNU_undef
:
21401 /* Only skip the data by MAC_PTR. */
21403 unsigned int bytes_read
;
21405 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21406 mac_ptr
+= bytes_read
;
21407 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21408 mac_ptr
+= bytes_read
;
21412 case DW_MACRO_GNU_start_file
:
21414 unsigned int bytes_read
;
21417 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21418 mac_ptr
+= bytes_read
;
21419 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21420 mac_ptr
+= bytes_read
;
21422 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21426 case DW_MACRO_GNU_end_file
:
21427 /* No data to skip by MAC_PTR. */
21430 case DW_MACRO_GNU_define_indirect
:
21431 case DW_MACRO_GNU_undef_indirect
:
21432 case DW_MACRO_GNU_define_indirect_alt
:
21433 case DW_MACRO_GNU_undef_indirect_alt
:
21435 unsigned int bytes_read
;
21437 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21438 mac_ptr
+= bytes_read
;
21439 mac_ptr
+= offset_size
;
21443 case DW_MACRO_GNU_transparent_include
:
21444 case DW_MACRO_GNU_transparent_include_alt
:
21445 /* Note that, according to the spec, a transparent include
21446 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21447 skip this opcode. */
21448 mac_ptr
+= offset_size
;
21451 case DW_MACINFO_vendor_ext
:
21452 /* Only skip the data by MAC_PTR. */
21453 if (!section_is_gnu
)
21455 unsigned int bytes_read
;
21457 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21458 mac_ptr
+= bytes_read
;
21459 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21460 mac_ptr
+= bytes_read
;
21465 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21466 mac_ptr
, mac_end
, abfd
, offset_size
,
21468 if (mac_ptr
== NULL
)
21472 } while (macinfo_type
!= 0 && current_file
== NULL
);
21474 /* Second pass: Process all entries.
21476 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21477 command-line macro definitions/undefinitions. This flag is unset when we
21478 reach the first DW_MACINFO_start_file entry. */
21480 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21481 NULL
, xcalloc
, xfree
);
21482 cleanup
= make_cleanup_htab_delete (include_hash
);
21483 mac_ptr
= section
->buffer
+ offset
;
21484 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21485 *slot
= (void *) mac_ptr
;
21486 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21487 current_file
, lh
, section
,
21488 section_is_gnu
, 0, offset_size
, include_hash
);
21489 do_cleanups (cleanup
);
21492 /* Check if the attribute's form is a DW_FORM_block*
21493 if so return true else false. */
21496 attr_form_is_block (const struct attribute
*attr
)
21498 return (attr
== NULL
? 0 :
21499 attr
->form
== DW_FORM_block1
21500 || attr
->form
== DW_FORM_block2
21501 || attr
->form
== DW_FORM_block4
21502 || attr
->form
== DW_FORM_block
21503 || attr
->form
== DW_FORM_exprloc
);
21506 /* Return non-zero if ATTR's value is a section offset --- classes
21507 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21508 You may use DW_UNSND (attr) to retrieve such offsets.
21510 Section 7.5.4, "Attribute Encodings", explains that no attribute
21511 may have a value that belongs to more than one of these classes; it
21512 would be ambiguous if we did, because we use the same forms for all
21516 attr_form_is_section_offset (const struct attribute
*attr
)
21518 return (attr
->form
== DW_FORM_data4
21519 || attr
->form
== DW_FORM_data8
21520 || attr
->form
== DW_FORM_sec_offset
);
21523 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21524 zero otherwise. When this function returns true, you can apply
21525 dwarf2_get_attr_constant_value to it.
21527 However, note that for some attributes you must check
21528 attr_form_is_section_offset before using this test. DW_FORM_data4
21529 and DW_FORM_data8 are members of both the constant class, and of
21530 the classes that contain offsets into other debug sections
21531 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21532 that, if an attribute's can be either a constant or one of the
21533 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21534 taken as section offsets, not constants. */
21537 attr_form_is_constant (const struct attribute
*attr
)
21539 switch (attr
->form
)
21541 case DW_FORM_sdata
:
21542 case DW_FORM_udata
:
21543 case DW_FORM_data1
:
21544 case DW_FORM_data2
:
21545 case DW_FORM_data4
:
21546 case DW_FORM_data8
:
21554 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21555 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21558 attr_form_is_ref (const struct attribute
*attr
)
21560 switch (attr
->form
)
21562 case DW_FORM_ref_addr
:
21567 case DW_FORM_ref_udata
:
21568 case DW_FORM_GNU_ref_alt
:
21575 /* Return the .debug_loc section to use for CU.
21576 For DWO files use .debug_loc.dwo. */
21578 static struct dwarf2_section_info
*
21579 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21582 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21583 return &dwarf2_per_objfile
->loc
;
21586 /* A helper function that fills in a dwarf2_loclist_baton. */
21589 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21590 struct dwarf2_loclist_baton
*baton
,
21591 const struct attribute
*attr
)
21593 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21595 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21597 baton
->per_cu
= cu
->per_cu
;
21598 gdb_assert (baton
->per_cu
);
21599 /* We don't know how long the location list is, but make sure we
21600 don't run off the edge of the section. */
21601 baton
->size
= section
->size
- DW_UNSND (attr
);
21602 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21603 baton
->base_address
= cu
->base_address
;
21604 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21608 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21609 struct dwarf2_cu
*cu
, int is_block
)
21611 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21612 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21614 if (attr_form_is_section_offset (attr
)
21615 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21616 the section. If so, fall through to the complaint in the
21618 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21620 struct dwarf2_loclist_baton
*baton
;
21622 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21623 sizeof (struct dwarf2_loclist_baton
));
21625 fill_in_loclist_baton (cu
, baton
, attr
);
21627 if (cu
->base_known
== 0)
21628 complaint (&symfile_complaints
,
21629 _("Location list used without "
21630 "specifying the CU base address."));
21632 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21633 ? dwarf2_loclist_block_index
21634 : dwarf2_loclist_index
);
21635 SYMBOL_LOCATION_BATON (sym
) = baton
;
21639 struct dwarf2_locexpr_baton
*baton
;
21641 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21642 sizeof (struct dwarf2_locexpr_baton
));
21643 baton
->per_cu
= cu
->per_cu
;
21644 gdb_assert (baton
->per_cu
);
21646 if (attr_form_is_block (attr
))
21648 /* Note that we're just copying the block's data pointer
21649 here, not the actual data. We're still pointing into the
21650 info_buffer for SYM's objfile; right now we never release
21651 that buffer, but when we do clean up properly this may
21653 baton
->size
= DW_BLOCK (attr
)->size
;
21654 baton
->data
= DW_BLOCK (attr
)->data
;
21658 dwarf2_invalid_attrib_class_complaint ("location description",
21659 SYMBOL_NATURAL_NAME (sym
));
21663 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21664 ? dwarf2_locexpr_block_index
21665 : dwarf2_locexpr_index
);
21666 SYMBOL_LOCATION_BATON (sym
) = baton
;
21670 /* Return the OBJFILE associated with the compilation unit CU. If CU
21671 came from a separate debuginfo file, then the master objfile is
21675 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21677 struct objfile
*objfile
= per_cu
->objfile
;
21679 /* Return the master objfile, so that we can report and look up the
21680 correct file containing this variable. */
21681 if (objfile
->separate_debug_objfile_backlink
)
21682 objfile
= objfile
->separate_debug_objfile_backlink
;
21687 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21688 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21689 CU_HEADERP first. */
21691 static const struct comp_unit_head
*
21692 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21693 struct dwarf2_per_cu_data
*per_cu
)
21695 const gdb_byte
*info_ptr
;
21698 return &per_cu
->cu
->header
;
21700 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21702 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21703 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21708 /* Return the address size given in the compilation unit header for CU. */
21711 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21713 struct comp_unit_head cu_header_local
;
21714 const struct comp_unit_head
*cu_headerp
;
21716 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21718 return cu_headerp
->addr_size
;
21721 /* Return the offset size given in the compilation unit header for CU. */
21724 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21726 struct comp_unit_head cu_header_local
;
21727 const struct comp_unit_head
*cu_headerp
;
21729 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21731 return cu_headerp
->offset_size
;
21734 /* See its dwarf2loc.h declaration. */
21737 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21739 struct comp_unit_head cu_header_local
;
21740 const struct comp_unit_head
*cu_headerp
;
21742 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21744 if (cu_headerp
->version
== 2)
21745 return cu_headerp
->addr_size
;
21747 return cu_headerp
->offset_size
;
21750 /* Return the text offset of the CU. The returned offset comes from
21751 this CU's objfile. If this objfile came from a separate debuginfo
21752 file, then the offset may be different from the corresponding
21753 offset in the parent objfile. */
21756 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21758 struct objfile
*objfile
= per_cu
->objfile
;
21760 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21763 /* Locate the .debug_info compilation unit from CU's objfile which contains
21764 the DIE at OFFSET. Raises an error on failure. */
21766 static struct dwarf2_per_cu_data
*
21767 dwarf2_find_containing_comp_unit (sect_offset offset
,
21768 unsigned int offset_in_dwz
,
21769 struct objfile
*objfile
)
21771 struct dwarf2_per_cu_data
*this_cu
;
21773 const sect_offset
*cu_off
;
21776 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21779 struct dwarf2_per_cu_data
*mid_cu
;
21780 int mid
= low
+ (high
- low
) / 2;
21782 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21783 cu_off
= &mid_cu
->offset
;
21784 if (mid_cu
->is_dwz
> offset_in_dwz
21785 || (mid_cu
->is_dwz
== offset_in_dwz
21786 && cu_off
->sect_off
>= offset
.sect_off
))
21791 gdb_assert (low
== high
);
21792 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21793 cu_off
= &this_cu
->offset
;
21794 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21796 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21797 error (_("Dwarf Error: could not find partial DIE containing "
21798 "offset 0x%lx [in module %s]"),
21799 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21801 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21802 <= offset
.sect_off
);
21803 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21807 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21808 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21809 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21810 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21811 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21816 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21819 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21821 memset (cu
, 0, sizeof (*cu
));
21823 cu
->per_cu
= per_cu
;
21824 cu
->objfile
= per_cu
->objfile
;
21825 obstack_init (&cu
->comp_unit_obstack
);
21828 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21831 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21832 enum language pretend_language
)
21834 struct attribute
*attr
;
21836 /* Set the language we're debugging. */
21837 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21839 set_cu_language (DW_UNSND (attr
), cu
);
21842 cu
->language
= pretend_language
;
21843 cu
->language_defn
= language_def (cu
->language
);
21846 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21848 cu
->producer
= DW_STRING (attr
);
21851 /* Release one cached compilation unit, CU. We unlink it from the tree
21852 of compilation units, but we don't remove it from the read_in_chain;
21853 the caller is responsible for that.
21854 NOTE: DATA is a void * because this function is also used as a
21855 cleanup routine. */
21858 free_heap_comp_unit (void *data
)
21860 struct dwarf2_cu
*cu
= data
;
21862 gdb_assert (cu
->per_cu
!= NULL
);
21863 cu
->per_cu
->cu
= NULL
;
21866 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21871 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21872 when we're finished with it. We can't free the pointer itself, but be
21873 sure to unlink it from the cache. Also release any associated storage. */
21876 free_stack_comp_unit (void *data
)
21878 struct dwarf2_cu
*cu
= data
;
21880 gdb_assert (cu
->per_cu
!= NULL
);
21881 cu
->per_cu
->cu
= NULL
;
21884 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21885 cu
->partial_dies
= NULL
;
21888 /* Free all cached compilation units. */
21891 free_cached_comp_units (void *data
)
21893 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21895 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21896 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21897 while (per_cu
!= NULL
)
21899 struct dwarf2_per_cu_data
*next_cu
;
21901 next_cu
= per_cu
->cu
->read_in_chain
;
21903 free_heap_comp_unit (per_cu
->cu
);
21904 *last_chain
= next_cu
;
21910 /* Increase the age counter on each cached compilation unit, and free
21911 any that are too old. */
21914 age_cached_comp_units (void)
21916 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21918 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21919 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21920 while (per_cu
!= NULL
)
21922 per_cu
->cu
->last_used
++;
21923 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21924 dwarf2_mark (per_cu
->cu
);
21925 per_cu
= per_cu
->cu
->read_in_chain
;
21928 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21929 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21930 while (per_cu
!= NULL
)
21932 struct dwarf2_per_cu_data
*next_cu
;
21934 next_cu
= per_cu
->cu
->read_in_chain
;
21936 if (!per_cu
->cu
->mark
)
21938 free_heap_comp_unit (per_cu
->cu
);
21939 *last_chain
= next_cu
;
21942 last_chain
= &per_cu
->cu
->read_in_chain
;
21948 /* Remove a single compilation unit from the cache. */
21951 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
21953 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21955 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21956 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21957 while (per_cu
!= NULL
)
21959 struct dwarf2_per_cu_data
*next_cu
;
21961 next_cu
= per_cu
->cu
->read_in_chain
;
21963 if (per_cu
== target_per_cu
)
21965 free_heap_comp_unit (per_cu
->cu
);
21967 *last_chain
= next_cu
;
21971 last_chain
= &per_cu
->cu
->read_in_chain
;
21977 /* Release all extra memory associated with OBJFILE. */
21980 dwarf2_free_objfile (struct objfile
*objfile
)
21982 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
21984 if (dwarf2_per_objfile
== NULL
)
21987 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21988 free_cached_comp_units (NULL
);
21990 if (dwarf2_per_objfile
->quick_file_names_table
)
21991 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
21993 if (dwarf2_per_objfile
->line_header_hash
)
21994 htab_delete (dwarf2_per_objfile
->line_header_hash
);
21996 /* Everything else should be on the objfile obstack. */
21999 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22000 We store these in a hash table separate from the DIEs, and preserve them
22001 when the DIEs are flushed out of cache.
22003 The CU "per_cu" pointer is needed because offset alone is not enough to
22004 uniquely identify the type. A file may have multiple .debug_types sections,
22005 or the type may come from a DWO file. Furthermore, while it's more logical
22006 to use per_cu->section+offset, with Fission the section with the data is in
22007 the DWO file but we don't know that section at the point we need it.
22008 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22009 because we can enter the lookup routine, get_die_type_at_offset, from
22010 outside this file, and thus won't necessarily have PER_CU->cu.
22011 Fortunately, PER_CU is stable for the life of the objfile. */
22013 struct dwarf2_per_cu_offset_and_type
22015 const struct dwarf2_per_cu_data
*per_cu
;
22016 sect_offset offset
;
22020 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22023 per_cu_offset_and_type_hash (const void *item
)
22025 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22027 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22030 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22033 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22035 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22036 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22038 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22039 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22042 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22043 table if necessary. For convenience, return TYPE.
22045 The DIEs reading must have careful ordering to:
22046 * Not cause infite loops trying to read in DIEs as a prerequisite for
22047 reading current DIE.
22048 * Not trying to dereference contents of still incompletely read in types
22049 while reading in other DIEs.
22050 * Enable referencing still incompletely read in types just by a pointer to
22051 the type without accessing its fields.
22053 Therefore caller should follow these rules:
22054 * Try to fetch any prerequisite types we may need to build this DIE type
22055 before building the type and calling set_die_type.
22056 * After building type call set_die_type for current DIE as soon as
22057 possible before fetching more types to complete the current type.
22058 * Make the type as complete as possible before fetching more types. */
22060 static struct type
*
22061 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22063 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22064 struct objfile
*objfile
= cu
->objfile
;
22065 struct attribute
*attr
;
22066 struct dynamic_prop prop
;
22068 /* For Ada types, make sure that the gnat-specific data is always
22069 initialized (if not already set). There are a few types where
22070 we should not be doing so, because the type-specific area is
22071 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22072 where the type-specific area is used to store the floatformat).
22073 But this is not a problem, because the gnat-specific information
22074 is actually not needed for these types. */
22075 if (need_gnat_info (cu
)
22076 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22077 && TYPE_CODE (type
) != TYPE_CODE_FLT
22078 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22079 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22080 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22081 && !HAVE_GNAT_AUX_INFO (type
))
22082 INIT_GNAT_SPECIFIC (type
);
22084 /* Read DW_AT_data_location and set in type. */
22085 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22086 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22088 TYPE_DATA_LOCATION (type
)
22089 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (prop
));
22090 *TYPE_DATA_LOCATION (type
) = prop
;
22093 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22095 dwarf2_per_objfile
->die_type_hash
=
22096 htab_create_alloc_ex (127,
22097 per_cu_offset_and_type_hash
,
22098 per_cu_offset_and_type_eq
,
22100 &objfile
->objfile_obstack
,
22101 hashtab_obstack_allocate
,
22102 dummy_obstack_deallocate
);
22105 ofs
.per_cu
= cu
->per_cu
;
22106 ofs
.offset
= die
->offset
;
22108 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22109 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22111 complaint (&symfile_complaints
,
22112 _("A problem internal to GDB: DIE 0x%x has type already set"),
22113 die
->offset
.sect_off
);
22114 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22119 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22120 or return NULL if the die does not have a saved type. */
22122 static struct type
*
22123 get_die_type_at_offset (sect_offset offset
,
22124 struct dwarf2_per_cu_data
*per_cu
)
22126 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22128 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22131 ofs
.per_cu
= per_cu
;
22132 ofs
.offset
= offset
;
22133 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22140 /* Look up the type for DIE in CU in die_type_hash,
22141 or return NULL if DIE does not have a saved type. */
22143 static struct type
*
22144 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22146 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22149 /* Add a dependence relationship from CU to REF_PER_CU. */
22152 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22153 struct dwarf2_per_cu_data
*ref_per_cu
)
22157 if (cu
->dependencies
== NULL
)
22159 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22160 NULL
, &cu
->comp_unit_obstack
,
22161 hashtab_obstack_allocate
,
22162 dummy_obstack_deallocate
);
22164 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22166 *slot
= ref_per_cu
;
22169 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22170 Set the mark field in every compilation unit in the
22171 cache that we must keep because we are keeping CU. */
22174 dwarf2_mark_helper (void **slot
, void *data
)
22176 struct dwarf2_per_cu_data
*per_cu
;
22178 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22180 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22181 reading of the chain. As such dependencies remain valid it is not much
22182 useful to track and undo them during QUIT cleanups. */
22183 if (per_cu
->cu
== NULL
)
22186 if (per_cu
->cu
->mark
)
22188 per_cu
->cu
->mark
= 1;
22190 if (per_cu
->cu
->dependencies
!= NULL
)
22191 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22196 /* Set the mark field in CU and in every other compilation unit in the
22197 cache that we must keep because we are keeping CU. */
22200 dwarf2_mark (struct dwarf2_cu
*cu
)
22205 if (cu
->dependencies
!= NULL
)
22206 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22210 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22214 per_cu
->cu
->mark
= 0;
22215 per_cu
= per_cu
->cu
->read_in_chain
;
22219 /* Trivial hash function for partial_die_info: the hash value of a DIE
22220 is its offset in .debug_info for this objfile. */
22223 partial_die_hash (const void *item
)
22225 const struct partial_die_info
*part_die
= item
;
22227 return part_die
->offset
.sect_off
;
22230 /* Trivial comparison function for partial_die_info structures: two DIEs
22231 are equal if they have the same offset. */
22234 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22236 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22237 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22239 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22242 static struct cmd_list_element
*set_dwarf2_cmdlist
;
22243 static struct cmd_list_element
*show_dwarf2_cmdlist
;
22246 set_dwarf2_cmd (char *args
, int from_tty
)
22248 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", all_commands
,
22253 show_dwarf2_cmd (char *args
, int from_tty
)
22255 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
22258 /* Free data associated with OBJFILE, if necessary. */
22261 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22263 struct dwarf2_per_objfile
*data
= d
;
22266 /* Make sure we don't accidentally use dwarf2_per_objfile while
22268 dwarf2_per_objfile
= NULL
;
22270 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22271 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22273 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22274 VEC_free (dwarf2_per_cu_ptr
,
22275 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22276 xfree (data
->all_type_units
);
22278 VEC_free (dwarf2_section_info_def
, data
->types
);
22280 if (data
->dwo_files
)
22281 free_dwo_files (data
->dwo_files
, objfile
);
22282 if (data
->dwp_file
)
22283 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22285 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22286 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22290 /* The "save gdb-index" command. */
22292 /* The contents of the hash table we create when building the string
22294 struct strtab_entry
22296 offset_type offset
;
22300 /* Hash function for a strtab_entry.
22302 Function is used only during write_hash_table so no index format backward
22303 compatibility is needed. */
22306 hash_strtab_entry (const void *e
)
22308 const struct strtab_entry
*entry
= e
;
22309 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22312 /* Equality function for a strtab_entry. */
22315 eq_strtab_entry (const void *a
, const void *b
)
22317 const struct strtab_entry
*ea
= a
;
22318 const struct strtab_entry
*eb
= b
;
22319 return !strcmp (ea
->str
, eb
->str
);
22322 /* Create a strtab_entry hash table. */
22325 create_strtab (void)
22327 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22328 xfree
, xcalloc
, xfree
);
22331 /* Add a string to the constant pool. Return the string's offset in
22335 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22338 struct strtab_entry entry
;
22339 struct strtab_entry
*result
;
22342 slot
= htab_find_slot (table
, &entry
, INSERT
);
22347 result
= XNEW (struct strtab_entry
);
22348 result
->offset
= obstack_object_size (cpool
);
22350 obstack_grow_str0 (cpool
, str
);
22353 return result
->offset
;
22356 /* An entry in the symbol table. */
22357 struct symtab_index_entry
22359 /* The name of the symbol. */
22361 /* The offset of the name in the constant pool. */
22362 offset_type index_offset
;
22363 /* A sorted vector of the indices of all the CUs that hold an object
22365 VEC (offset_type
) *cu_indices
;
22368 /* The symbol table. This is a power-of-2-sized hash table. */
22369 struct mapped_symtab
22371 offset_type n_elements
;
22373 struct symtab_index_entry
**data
;
22376 /* Hash function for a symtab_index_entry. */
22379 hash_symtab_entry (const void *e
)
22381 const struct symtab_index_entry
*entry
= e
;
22382 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22383 sizeof (offset_type
) * VEC_length (offset_type
,
22384 entry
->cu_indices
),
22388 /* Equality function for a symtab_index_entry. */
22391 eq_symtab_entry (const void *a
, const void *b
)
22393 const struct symtab_index_entry
*ea
= a
;
22394 const struct symtab_index_entry
*eb
= b
;
22395 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22396 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22398 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22399 VEC_address (offset_type
, eb
->cu_indices
),
22400 sizeof (offset_type
) * len
);
22403 /* Destroy a symtab_index_entry. */
22406 delete_symtab_entry (void *p
)
22408 struct symtab_index_entry
*entry
= p
;
22409 VEC_free (offset_type
, entry
->cu_indices
);
22413 /* Create a hash table holding symtab_index_entry objects. */
22416 create_symbol_hash_table (void)
22418 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22419 delete_symtab_entry
, xcalloc
, xfree
);
22422 /* Create a new mapped symtab object. */
22424 static struct mapped_symtab
*
22425 create_mapped_symtab (void)
22427 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22428 symtab
->n_elements
= 0;
22429 symtab
->size
= 1024;
22430 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22434 /* Destroy a mapped_symtab. */
22437 cleanup_mapped_symtab (void *p
)
22439 struct mapped_symtab
*symtab
= p
;
22440 /* The contents of the array are freed when the other hash table is
22442 xfree (symtab
->data
);
22446 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22449 Function is used only during write_hash_table so no index format backward
22450 compatibility is needed. */
22452 static struct symtab_index_entry
**
22453 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22455 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22457 index
= hash
& (symtab
->size
- 1);
22458 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22462 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22463 return &symtab
->data
[index
];
22464 index
= (index
+ step
) & (symtab
->size
- 1);
22468 /* Expand SYMTAB's hash table. */
22471 hash_expand (struct mapped_symtab
*symtab
)
22473 offset_type old_size
= symtab
->size
;
22475 struct symtab_index_entry
**old_entries
= symtab
->data
;
22478 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22480 for (i
= 0; i
< old_size
; ++i
)
22482 if (old_entries
[i
])
22484 struct symtab_index_entry
**slot
= find_slot (symtab
,
22485 old_entries
[i
]->name
);
22486 *slot
= old_entries
[i
];
22490 xfree (old_entries
);
22493 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22494 CU_INDEX is the index of the CU in which the symbol appears.
22495 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22498 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22499 int is_static
, gdb_index_symbol_kind kind
,
22500 offset_type cu_index
)
22502 struct symtab_index_entry
**slot
;
22503 offset_type cu_index_and_attrs
;
22505 ++symtab
->n_elements
;
22506 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22507 hash_expand (symtab
);
22509 slot
= find_slot (symtab
, name
);
22512 *slot
= XNEW (struct symtab_index_entry
);
22513 (*slot
)->name
= name
;
22514 /* index_offset is set later. */
22515 (*slot
)->cu_indices
= NULL
;
22518 cu_index_and_attrs
= 0;
22519 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22520 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22521 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22523 /* We don't want to record an index value twice as we want to avoid the
22525 We process all global symbols and then all static symbols
22526 (which would allow us to avoid the duplication by only having to check
22527 the last entry pushed), but a symbol could have multiple kinds in one CU.
22528 To keep things simple we don't worry about the duplication here and
22529 sort and uniqufy the list after we've processed all symbols. */
22530 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22533 /* qsort helper routine for uniquify_cu_indices. */
22536 offset_type_compare (const void *ap
, const void *bp
)
22538 offset_type a
= *(offset_type
*) ap
;
22539 offset_type b
= *(offset_type
*) bp
;
22541 return (a
> b
) - (b
> a
);
22544 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22547 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22551 for (i
= 0; i
< symtab
->size
; ++i
)
22553 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22556 && entry
->cu_indices
!= NULL
)
22558 unsigned int next_to_insert
, next_to_check
;
22559 offset_type last_value
;
22561 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22562 VEC_length (offset_type
, entry
->cu_indices
),
22563 sizeof (offset_type
), offset_type_compare
);
22565 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22566 next_to_insert
= 1;
22567 for (next_to_check
= 1;
22568 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22571 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22574 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22576 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22581 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22586 /* Add a vector of indices to the constant pool. */
22589 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22590 struct symtab_index_entry
*entry
)
22594 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22597 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22598 offset_type val
= MAYBE_SWAP (len
);
22603 entry
->index_offset
= obstack_object_size (cpool
);
22605 obstack_grow (cpool
, &val
, sizeof (val
));
22607 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22610 val
= MAYBE_SWAP (iter
);
22611 obstack_grow (cpool
, &val
, sizeof (val
));
22616 struct symtab_index_entry
*old_entry
= *slot
;
22617 entry
->index_offset
= old_entry
->index_offset
;
22620 return entry
->index_offset
;
22623 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22624 constant pool entries going into the obstack CPOOL. */
22627 write_hash_table (struct mapped_symtab
*symtab
,
22628 struct obstack
*output
, struct obstack
*cpool
)
22631 htab_t symbol_hash_table
;
22634 symbol_hash_table
= create_symbol_hash_table ();
22635 str_table
= create_strtab ();
22637 /* We add all the index vectors to the constant pool first, to
22638 ensure alignment is ok. */
22639 for (i
= 0; i
< symtab
->size
; ++i
)
22641 if (symtab
->data
[i
])
22642 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22645 /* Now write out the hash table. */
22646 for (i
= 0; i
< symtab
->size
; ++i
)
22648 offset_type str_off
, vec_off
;
22650 if (symtab
->data
[i
])
22652 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22653 vec_off
= symtab
->data
[i
]->index_offset
;
22657 /* While 0 is a valid constant pool index, it is not valid
22658 to have 0 for both offsets. */
22663 str_off
= MAYBE_SWAP (str_off
);
22664 vec_off
= MAYBE_SWAP (vec_off
);
22666 obstack_grow (output
, &str_off
, sizeof (str_off
));
22667 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22670 htab_delete (str_table
);
22671 htab_delete (symbol_hash_table
);
22674 /* Struct to map psymtab to CU index in the index file. */
22675 struct psymtab_cu_index_map
22677 struct partial_symtab
*psymtab
;
22678 unsigned int cu_index
;
22682 hash_psymtab_cu_index (const void *item
)
22684 const struct psymtab_cu_index_map
*map
= item
;
22686 return htab_hash_pointer (map
->psymtab
);
22690 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22692 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22693 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22695 return lhs
->psymtab
== rhs
->psymtab
;
22698 /* Helper struct for building the address table. */
22699 struct addrmap_index_data
22701 struct objfile
*objfile
;
22702 struct obstack
*addr_obstack
;
22703 htab_t cu_index_htab
;
22705 /* Non-zero if the previous_* fields are valid.
22706 We can't write an entry until we see the next entry (since it is only then
22707 that we know the end of the entry). */
22708 int previous_valid
;
22709 /* Index of the CU in the table of all CUs in the index file. */
22710 unsigned int previous_cu_index
;
22711 /* Start address of the CU. */
22712 CORE_ADDR previous_cu_start
;
22715 /* Write an address entry to OBSTACK. */
22718 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22719 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22721 offset_type cu_index_to_write
;
22723 CORE_ADDR baseaddr
;
22725 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22727 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22728 obstack_grow (obstack
, addr
, 8);
22729 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22730 obstack_grow (obstack
, addr
, 8);
22731 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22732 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22735 /* Worker function for traversing an addrmap to build the address table. */
22738 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22740 struct addrmap_index_data
*data
= datap
;
22741 struct partial_symtab
*pst
= obj
;
22743 if (data
->previous_valid
)
22744 add_address_entry (data
->objfile
, data
->addr_obstack
,
22745 data
->previous_cu_start
, start_addr
,
22746 data
->previous_cu_index
);
22748 data
->previous_cu_start
= start_addr
;
22751 struct psymtab_cu_index_map find_map
, *map
;
22752 find_map
.psymtab
= pst
;
22753 map
= htab_find (data
->cu_index_htab
, &find_map
);
22754 gdb_assert (map
!= NULL
);
22755 data
->previous_cu_index
= map
->cu_index
;
22756 data
->previous_valid
= 1;
22759 data
->previous_valid
= 0;
22764 /* Write OBJFILE's address map to OBSTACK.
22765 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22766 in the index file. */
22769 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22770 htab_t cu_index_htab
)
22772 struct addrmap_index_data addrmap_index_data
;
22774 /* When writing the address table, we have to cope with the fact that
22775 the addrmap iterator only provides the start of a region; we have to
22776 wait until the next invocation to get the start of the next region. */
22778 addrmap_index_data
.objfile
= objfile
;
22779 addrmap_index_data
.addr_obstack
= obstack
;
22780 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22781 addrmap_index_data
.previous_valid
= 0;
22783 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22784 &addrmap_index_data
);
22786 /* It's highly unlikely the last entry (end address = 0xff...ff)
22787 is valid, but we should still handle it.
22788 The end address is recorded as the start of the next region, but that
22789 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22791 if (addrmap_index_data
.previous_valid
)
22792 add_address_entry (objfile
, obstack
,
22793 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22794 addrmap_index_data
.previous_cu_index
);
22797 /* Return the symbol kind of PSYM. */
22799 static gdb_index_symbol_kind
22800 symbol_kind (struct partial_symbol
*psym
)
22802 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22803 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22811 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22813 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22815 case LOC_CONST_BYTES
:
22816 case LOC_OPTIMIZED_OUT
:
22818 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22820 /* Note: It's currently impossible to recognize psyms as enum values
22821 short of reading the type info. For now punt. */
22822 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22824 /* There are other LOC_FOO values that one might want to classify
22825 as variables, but dwarf2read.c doesn't currently use them. */
22826 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22828 case STRUCT_DOMAIN
:
22829 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22831 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22835 /* Add a list of partial symbols to SYMTAB. */
22838 write_psymbols (struct mapped_symtab
*symtab
,
22840 struct partial_symbol
**psymp
,
22842 offset_type cu_index
,
22845 for (; count
-- > 0; ++psymp
)
22847 struct partial_symbol
*psym
= *psymp
;
22850 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22851 error (_("Ada is not currently supported by the index"));
22853 /* Only add a given psymbol once. */
22854 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22857 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22860 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22861 is_static
, kind
, cu_index
);
22866 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22867 exception if there is an error. */
22870 write_obstack (FILE *file
, struct obstack
*obstack
)
22872 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22874 != obstack_object_size (obstack
))
22875 error (_("couldn't data write to file"));
22878 /* Unlink a file if the argument is not NULL. */
22881 unlink_if_set (void *p
)
22883 char **filename
= p
;
22885 unlink (*filename
);
22888 /* A helper struct used when iterating over debug_types. */
22889 struct signatured_type_index_data
22891 struct objfile
*objfile
;
22892 struct mapped_symtab
*symtab
;
22893 struct obstack
*types_list
;
22898 /* A helper function that writes a single signatured_type to an
22902 write_one_signatured_type (void **slot
, void *d
)
22904 struct signatured_type_index_data
*info
= d
;
22905 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22906 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22909 write_psymbols (info
->symtab
,
22911 info
->objfile
->global_psymbols
.list
22912 + psymtab
->globals_offset
,
22913 psymtab
->n_global_syms
, info
->cu_index
,
22915 write_psymbols (info
->symtab
,
22917 info
->objfile
->static_psymbols
.list
22918 + psymtab
->statics_offset
,
22919 psymtab
->n_static_syms
, info
->cu_index
,
22922 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22923 entry
->per_cu
.offset
.sect_off
);
22924 obstack_grow (info
->types_list
, val
, 8);
22925 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22926 entry
->type_offset_in_tu
.cu_off
);
22927 obstack_grow (info
->types_list
, val
, 8);
22928 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22929 obstack_grow (info
->types_list
, val
, 8);
22936 /* Recurse into all "included" dependencies and write their symbols as
22937 if they appeared in this psymtab. */
22940 recursively_write_psymbols (struct objfile
*objfile
,
22941 struct partial_symtab
*psymtab
,
22942 struct mapped_symtab
*symtab
,
22944 offset_type cu_index
)
22948 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22949 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22950 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22951 symtab
, psyms_seen
, cu_index
);
22953 write_psymbols (symtab
,
22955 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22956 psymtab
->n_global_syms
, cu_index
,
22958 write_psymbols (symtab
,
22960 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
22961 psymtab
->n_static_syms
, cu_index
,
22965 /* Create an index file for OBJFILE in the directory DIR. */
22968 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
22970 struct cleanup
*cleanup
;
22971 char *filename
, *cleanup_filename
;
22972 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
22973 struct obstack cu_list
, types_cu_list
;
22976 struct mapped_symtab
*symtab
;
22977 offset_type val
, size_of_contents
, total_len
;
22980 htab_t cu_index_htab
;
22981 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
22983 if (dwarf2_per_objfile
->using_index
)
22984 error (_("Cannot use an index to create the index"));
22986 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
22987 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22989 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
22992 if (stat (objfile_name (objfile
), &st
) < 0)
22993 perror_with_name (objfile_name (objfile
));
22995 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
22996 INDEX_SUFFIX
, (char *) NULL
);
22997 cleanup
= make_cleanup (xfree
, filename
);
22999 out_file
= gdb_fopen_cloexec (filename
, "wb");
23001 error (_("Can't open `%s' for writing"), filename
);
23003 cleanup_filename
= filename
;
23004 make_cleanup (unlink_if_set
, &cleanup_filename
);
23006 symtab
= create_mapped_symtab ();
23007 make_cleanup (cleanup_mapped_symtab
, symtab
);
23009 obstack_init (&addr_obstack
);
23010 make_cleanup_obstack_free (&addr_obstack
);
23012 obstack_init (&cu_list
);
23013 make_cleanup_obstack_free (&cu_list
);
23015 obstack_init (&types_cu_list
);
23016 make_cleanup_obstack_free (&types_cu_list
);
23018 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23019 NULL
, xcalloc
, xfree
);
23020 make_cleanup_htab_delete (psyms_seen
);
23022 /* While we're scanning CU's create a table that maps a psymtab pointer
23023 (which is what addrmap records) to its index (which is what is recorded
23024 in the index file). This will later be needed to write the address
23026 cu_index_htab
= htab_create_alloc (100,
23027 hash_psymtab_cu_index
,
23028 eq_psymtab_cu_index
,
23029 NULL
, xcalloc
, xfree
);
23030 make_cleanup_htab_delete (cu_index_htab
);
23031 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
23032 xmalloc (sizeof (struct psymtab_cu_index_map
)
23033 * dwarf2_per_objfile
->n_comp_units
);
23034 make_cleanup (xfree
, psymtab_cu_index_map
);
23036 /* The CU list is already sorted, so we don't need to do additional
23037 work here. Also, the debug_types entries do not appear in
23038 all_comp_units, but only in their own hash table. */
23039 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23041 struct dwarf2_per_cu_data
*per_cu
23042 = dwarf2_per_objfile
->all_comp_units
[i
];
23043 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23045 struct psymtab_cu_index_map
*map
;
23048 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23049 It may be referenced from a local scope but in such case it does not
23050 need to be present in .gdb_index. */
23051 if (psymtab
== NULL
)
23054 if (psymtab
->user
== NULL
)
23055 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23057 map
= &psymtab_cu_index_map
[i
];
23058 map
->psymtab
= psymtab
;
23060 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23061 gdb_assert (slot
!= NULL
);
23062 gdb_assert (*slot
== NULL
);
23065 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23066 per_cu
->offset
.sect_off
);
23067 obstack_grow (&cu_list
, val
, 8);
23068 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23069 obstack_grow (&cu_list
, val
, 8);
23072 /* Dump the address map. */
23073 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23075 /* Write out the .debug_type entries, if any. */
23076 if (dwarf2_per_objfile
->signatured_types
)
23078 struct signatured_type_index_data sig_data
;
23080 sig_data
.objfile
= objfile
;
23081 sig_data
.symtab
= symtab
;
23082 sig_data
.types_list
= &types_cu_list
;
23083 sig_data
.psyms_seen
= psyms_seen
;
23084 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23085 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23086 write_one_signatured_type
, &sig_data
);
23089 /* Now that we've processed all symbols we can shrink their cu_indices
23091 uniquify_cu_indices (symtab
);
23093 obstack_init (&constant_pool
);
23094 make_cleanup_obstack_free (&constant_pool
);
23095 obstack_init (&symtab_obstack
);
23096 make_cleanup_obstack_free (&symtab_obstack
);
23097 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23099 obstack_init (&contents
);
23100 make_cleanup_obstack_free (&contents
);
23101 size_of_contents
= 6 * sizeof (offset_type
);
23102 total_len
= size_of_contents
;
23104 /* The version number. */
23105 val
= MAYBE_SWAP (8);
23106 obstack_grow (&contents
, &val
, sizeof (val
));
23108 /* The offset of the CU list from the start of the file. */
23109 val
= MAYBE_SWAP (total_len
);
23110 obstack_grow (&contents
, &val
, sizeof (val
));
23111 total_len
+= obstack_object_size (&cu_list
);
23113 /* The offset of the types CU list from the start of the file. */
23114 val
= MAYBE_SWAP (total_len
);
23115 obstack_grow (&contents
, &val
, sizeof (val
));
23116 total_len
+= obstack_object_size (&types_cu_list
);
23118 /* The offset of the address table from the start of the file. */
23119 val
= MAYBE_SWAP (total_len
);
23120 obstack_grow (&contents
, &val
, sizeof (val
));
23121 total_len
+= obstack_object_size (&addr_obstack
);
23123 /* The offset of the symbol table from the start of the file. */
23124 val
= MAYBE_SWAP (total_len
);
23125 obstack_grow (&contents
, &val
, sizeof (val
));
23126 total_len
+= obstack_object_size (&symtab_obstack
);
23128 /* The offset of the constant pool from the start of the file. */
23129 val
= MAYBE_SWAP (total_len
);
23130 obstack_grow (&contents
, &val
, sizeof (val
));
23131 total_len
+= obstack_object_size (&constant_pool
);
23133 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23135 write_obstack (out_file
, &contents
);
23136 write_obstack (out_file
, &cu_list
);
23137 write_obstack (out_file
, &types_cu_list
);
23138 write_obstack (out_file
, &addr_obstack
);
23139 write_obstack (out_file
, &symtab_obstack
);
23140 write_obstack (out_file
, &constant_pool
);
23144 /* We want to keep the file, so we set cleanup_filename to NULL
23145 here. See unlink_if_set. */
23146 cleanup_filename
= NULL
;
23148 do_cleanups (cleanup
);
23151 /* Implementation of the `save gdb-index' command.
23153 Note that the file format used by this command is documented in the
23154 GDB manual. Any changes here must be documented there. */
23157 save_gdb_index_command (char *arg
, int from_tty
)
23159 struct objfile
*objfile
;
23162 error (_("usage: save gdb-index DIRECTORY"));
23164 ALL_OBJFILES (objfile
)
23168 /* If the objfile does not correspond to an actual file, skip it. */
23169 if (stat (objfile_name (objfile
), &st
) < 0)
23172 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23173 if (dwarf2_per_objfile
)
23175 volatile struct gdb_exception except
;
23177 TRY_CATCH (except
, RETURN_MASK_ERROR
)
23179 write_psymtabs_to_index (objfile
, arg
);
23181 if (except
.reason
< 0)
23182 exception_fprintf (gdb_stderr
, except
,
23183 _("Error while writing index for `%s': "),
23184 objfile_name (objfile
));
23191 int dwarf2_always_disassemble
;
23194 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
23195 struct cmd_list_element
*c
, const char *value
)
23197 fprintf_filtered (file
,
23198 _("Whether to always disassemble "
23199 "DWARF expressions is %s.\n"),
23204 show_check_physname (struct ui_file
*file
, int from_tty
,
23205 struct cmd_list_element
*c
, const char *value
)
23207 fprintf_filtered (file
,
23208 _("Whether to check \"physname\" is %s.\n"),
23212 void _initialize_dwarf2_read (void);
23215 _initialize_dwarf2_read (void)
23217 struct cmd_list_element
*c
;
23219 dwarf2_objfile_data_key
23220 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23222 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
23223 Set DWARF 2 specific variables.\n\
23224 Configure DWARF 2 variables such as the cache size"),
23225 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
23226 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23228 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
23229 Show DWARF 2 specific variables\n\
23230 Show DWARF 2 variables such as the cache size"),
23231 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
23232 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23234 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23235 &dwarf2_max_cache_age
, _("\
23236 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
23237 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
23238 A higher limit means that cached compilation units will be stored\n\
23239 in memory longer, and more total memory will be used. Zero disables\n\
23240 caching, which can slow down startup."),
23242 show_dwarf2_max_cache_age
,
23243 &set_dwarf2_cmdlist
,
23244 &show_dwarf2_cmdlist
);
23246 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23247 &dwarf2_always_disassemble
, _("\
23248 Set whether `info address' always disassembles DWARF expressions."), _("\
23249 Show whether `info address' always disassembles DWARF expressions."), _("\
23250 When enabled, DWARF expressions are always printed in an assembly-like\n\
23251 syntax. When disabled, expressions will be printed in a more\n\
23252 conversational style, when possible."),
23254 show_dwarf2_always_disassemble
,
23255 &set_dwarf2_cmdlist
,
23256 &show_dwarf2_cmdlist
);
23258 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
23259 Set debugging of the dwarf2 reader."), _("\
23260 Show debugging of the dwarf2 reader."), _("\
23261 When enabled (non-zero), debugging messages are printed during dwarf2\n\
23262 reading and symtab expansion. A value of 1 (one) provides basic\n\
23263 information. A value greater than 1 provides more verbose information."),
23266 &setdebuglist
, &showdebuglist
);
23268 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
23269 Set debugging of the dwarf2 DIE reader."), _("\
23270 Show debugging of the dwarf2 DIE reader."), _("\
23271 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23272 The value is the maximum depth to print."),
23275 &setdebuglist
, &showdebuglist
);
23277 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23278 Set cross-checking of \"physname\" code against demangler."), _("\
23279 Show cross-checking of \"physname\" code against demangler."), _("\
23280 When enabled, GDB's internal \"physname\" code is checked against\n\
23282 NULL
, show_check_physname
,
23283 &setdebuglist
, &showdebuglist
);
23285 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23286 no_class
, &use_deprecated_index_sections
, _("\
23287 Set whether to use deprecated gdb_index sections."), _("\
23288 Show whether to use deprecated gdb_index sections."), _("\
23289 When enabled, deprecated .gdb_index sections are used anyway.\n\
23290 Normally they are ignored either because of a missing feature or\n\
23291 performance issue.\n\
23292 Warning: This option must be enabled before gdb reads the file."),
23295 &setlist
, &showlist
);
23297 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23299 Save a gdb-index file.\n\
23300 Usage: save gdb-index DIRECTORY"),
23302 set_cmd_completer (c
, filename_completer
);
23304 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23305 &dwarf2_locexpr_funcs
);
23306 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23307 &dwarf2_loclist_funcs
);
23309 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23310 &dwarf2_block_frame_base_locexpr_funcs
);
23311 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23312 &dwarf2_block_frame_base_loclist_funcs
);