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"
72 #include "namespace.h"
75 #include <sys/types.h>
77 typedef struct symbol
*symbolp
;
80 /* When == 1, print basic high level tracing messages.
81 When > 1, be more verbose.
82 This is in contrast to the low level DIE reading of dwarf_die_debug. */
83 static unsigned int dwarf_read_debug
= 0;
85 /* When non-zero, dump DIEs after they are read in. */
86 static unsigned int dwarf_die_debug
= 0;
88 /* When non-zero, dump line number entries as they are read in. */
89 static unsigned int dwarf_line_debug
= 0;
91 /* When non-zero, cross-check physname against demangler. */
92 static int check_physname
= 0;
94 /* When non-zero, do not reject deprecated .gdb_index sections. */
95 static int use_deprecated_index_sections
= 0;
97 static const struct objfile_data
*dwarf2_objfile_data_key
;
99 /* The "aclass" indices for various kinds of computed DWARF symbols. */
101 static int dwarf2_locexpr_index
;
102 static int dwarf2_loclist_index
;
103 static int dwarf2_locexpr_block_index
;
104 static int dwarf2_loclist_block_index
;
106 /* A descriptor for dwarf sections.
108 S.ASECTION, SIZE are typically initialized when the objfile is first
109 scanned. BUFFER, READIN are filled in later when the section is read.
110 If the section contained compressed data then SIZE is updated to record
111 the uncompressed size of the section.
113 DWP file format V2 introduces a wrinkle that is easiest to handle by
114 creating the concept of virtual sections contained within a real section.
115 In DWP V2 the sections of the input DWO files are concatenated together
116 into one section, but section offsets are kept relative to the original
118 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
119 the real section this "virtual" section is contained in, and BUFFER,SIZE
120 describe the virtual section. */
122 struct dwarf2_section_info
126 /* If this is a real section, the bfd section. */
128 /* If this is a virtual section, pointer to the containing ("real")
130 struct dwarf2_section_info
*containing_section
;
132 /* Pointer to section data, only valid if readin. */
133 const gdb_byte
*buffer
;
134 /* The size of the section, real or virtual. */
136 /* If this is a virtual section, the offset in the real section.
137 Only valid if is_virtual. */
138 bfd_size_type virtual_offset
;
139 /* True if we have tried to read this section. */
141 /* True if this is a virtual section, False otherwise.
142 This specifies which of s.asection and s.containing_section to use. */
146 typedef struct dwarf2_section_info dwarf2_section_info_def
;
147 DEF_VEC_O (dwarf2_section_info_def
);
149 /* All offsets in the index are of this type. It must be
150 architecture-independent. */
151 typedef uint32_t offset_type
;
153 DEF_VEC_I (offset_type
);
155 /* Ensure only legit values are used. */
156 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
158 gdb_assert ((unsigned int) (value) <= 1); \
159 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
162 /* Ensure only legit values are used. */
163 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
165 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
166 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
167 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
170 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
171 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
173 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
174 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
177 /* A description of the mapped index. The file format is described in
178 a comment by the code that writes the index. */
181 /* Index data format version. */
184 /* The total length of the buffer. */
187 /* A pointer to the address table data. */
188 const gdb_byte
*address_table
;
190 /* Size of the address table data in bytes. */
191 offset_type address_table_size
;
193 /* The symbol table, implemented as a hash table. */
194 const offset_type
*symbol_table
;
196 /* Size in slots, each slot is 2 offset_types. */
197 offset_type symbol_table_slots
;
199 /* A pointer to the constant pool. */
200 const char *constant_pool
;
203 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
204 DEF_VEC_P (dwarf2_per_cu_ptr
);
208 int nr_uniq_abbrev_tables
;
210 int nr_symtab_sharers
;
211 int nr_stmt_less_type_units
;
212 int nr_all_type_units_reallocs
;
215 /* Collection of data recorded per objfile.
216 This hangs off of dwarf2_objfile_data_key. */
218 struct dwarf2_per_objfile
220 struct dwarf2_section_info info
;
221 struct dwarf2_section_info abbrev
;
222 struct dwarf2_section_info line
;
223 struct dwarf2_section_info loc
;
224 struct dwarf2_section_info macinfo
;
225 struct dwarf2_section_info macro
;
226 struct dwarf2_section_info str
;
227 struct dwarf2_section_info ranges
;
228 struct dwarf2_section_info addr
;
229 struct dwarf2_section_info frame
;
230 struct dwarf2_section_info eh_frame
;
231 struct dwarf2_section_info gdb_index
;
233 VEC (dwarf2_section_info_def
) *types
;
236 struct objfile
*objfile
;
238 /* Table of all the compilation units. This is used to locate
239 the target compilation unit of a particular reference. */
240 struct dwarf2_per_cu_data
**all_comp_units
;
242 /* The number of compilation units in ALL_COMP_UNITS. */
245 /* The number of .debug_types-related CUs. */
248 /* The number of elements allocated in all_type_units.
249 If there are skeleton-less TUs, we add them to all_type_units lazily. */
250 int n_allocated_type_units
;
252 /* The .debug_types-related CUs (TUs).
253 This is stored in malloc space because we may realloc it. */
254 struct signatured_type
**all_type_units
;
256 /* Table of struct type_unit_group objects.
257 The hash key is the DW_AT_stmt_list value. */
258 htab_t type_unit_groups
;
260 /* A table mapping .debug_types signatures to its signatured_type entry.
261 This is NULL if the .debug_types section hasn't been read in yet. */
262 htab_t signatured_types
;
264 /* Type unit statistics, to see how well the scaling improvements
266 struct tu_stats tu_stats
;
268 /* A chain of compilation units that are currently read in, so that
269 they can be freed later. */
270 struct dwarf2_per_cu_data
*read_in_chain
;
272 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
273 This is NULL if the table hasn't been allocated yet. */
276 /* Non-zero if we've check for whether there is a DWP file. */
279 /* The DWP file if there is one, or NULL. */
280 struct dwp_file
*dwp_file
;
282 /* The shared '.dwz' file, if one exists. This is used when the
283 original data was compressed using 'dwz -m'. */
284 struct dwz_file
*dwz_file
;
286 /* A flag indicating wether this objfile has a section loaded at a
288 int has_section_at_zero
;
290 /* True if we are using the mapped index,
291 or we are faking it for OBJF_READNOW's sake. */
292 unsigned char using_index
;
294 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
295 struct mapped_index
*index_table
;
297 /* When using index_table, this keeps track of all quick_file_names entries.
298 TUs typically share line table entries with a CU, so we maintain a
299 separate table of all line table entries to support the sharing.
300 Note that while there can be way more TUs than CUs, we've already
301 sorted all the TUs into "type unit groups", grouped by their
302 DW_AT_stmt_list value. Therefore the only sharing done here is with a
303 CU and its associated TU group if there is one. */
304 htab_t quick_file_names_table
;
306 /* Set during partial symbol reading, to prevent queueing of full
308 int reading_partial_symbols
;
310 /* Table mapping type DIEs to their struct type *.
311 This is NULL if not allocated yet.
312 The mapping is done via (CU/TU + DIE offset) -> type. */
313 htab_t die_type_hash
;
315 /* The CUs we recently read. */
316 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
318 /* Table containing line_header indexed by offset and offset_in_dwz. */
319 htab_t line_header_hash
;
322 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
324 /* Default names of the debugging sections. */
326 /* Note that if the debugging section has been compressed, it might
327 have a name like .zdebug_info. */
329 static const struct dwarf2_debug_sections dwarf2_elf_names
=
331 { ".debug_info", ".zdebug_info" },
332 { ".debug_abbrev", ".zdebug_abbrev" },
333 { ".debug_line", ".zdebug_line" },
334 { ".debug_loc", ".zdebug_loc" },
335 { ".debug_macinfo", ".zdebug_macinfo" },
336 { ".debug_macro", ".zdebug_macro" },
337 { ".debug_str", ".zdebug_str" },
338 { ".debug_ranges", ".zdebug_ranges" },
339 { ".debug_types", ".zdebug_types" },
340 { ".debug_addr", ".zdebug_addr" },
341 { ".debug_frame", ".zdebug_frame" },
342 { ".eh_frame", NULL
},
343 { ".gdb_index", ".zgdb_index" },
347 /* List of DWO/DWP sections. */
349 static const struct dwop_section_names
351 struct dwarf2_section_names abbrev_dwo
;
352 struct dwarf2_section_names info_dwo
;
353 struct dwarf2_section_names line_dwo
;
354 struct dwarf2_section_names loc_dwo
;
355 struct dwarf2_section_names macinfo_dwo
;
356 struct dwarf2_section_names macro_dwo
;
357 struct dwarf2_section_names str_dwo
;
358 struct dwarf2_section_names str_offsets_dwo
;
359 struct dwarf2_section_names types_dwo
;
360 struct dwarf2_section_names cu_index
;
361 struct dwarf2_section_names tu_index
;
365 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
366 { ".debug_info.dwo", ".zdebug_info.dwo" },
367 { ".debug_line.dwo", ".zdebug_line.dwo" },
368 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
369 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
370 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
371 { ".debug_str.dwo", ".zdebug_str.dwo" },
372 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
373 { ".debug_types.dwo", ".zdebug_types.dwo" },
374 { ".debug_cu_index", ".zdebug_cu_index" },
375 { ".debug_tu_index", ".zdebug_tu_index" },
378 /* local data types */
380 /* The data in a compilation unit header, after target2host
381 translation, looks like this. */
382 struct comp_unit_head
386 unsigned char addr_size
;
387 unsigned char signed_addr_p
;
388 sect_offset abbrev_offset
;
390 /* Size of file offsets; either 4 or 8. */
391 unsigned int offset_size
;
393 /* Size of the length field; either 4 or 12. */
394 unsigned int initial_length_size
;
396 /* Offset to the first byte of this compilation unit header in the
397 .debug_info section, for resolving relative reference dies. */
400 /* Offset to first die in this cu from the start of the cu.
401 This will be the first byte following the compilation unit header. */
402 cu_offset first_die_offset
;
405 /* Type used for delaying computation of method physnames.
406 See comments for compute_delayed_physnames. */
407 struct delayed_method_info
409 /* The type to which the method is attached, i.e., its parent class. */
412 /* The index of the method in the type's function fieldlists. */
415 /* The index of the method in the fieldlist. */
418 /* The name of the DIE. */
421 /* The DIE associated with this method. */
422 struct die_info
*die
;
425 typedef struct delayed_method_info delayed_method_info
;
426 DEF_VEC_O (delayed_method_info
);
428 /* Internal state when decoding a particular compilation unit. */
431 /* The objfile containing this compilation unit. */
432 struct objfile
*objfile
;
434 /* The header of the compilation unit. */
435 struct comp_unit_head header
;
437 /* Base address of this compilation unit. */
438 CORE_ADDR base_address
;
440 /* Non-zero if base_address has been set. */
443 /* The language we are debugging. */
444 enum language language
;
445 const struct language_defn
*language_defn
;
447 const char *producer
;
449 /* The generic symbol table building routines have separate lists for
450 file scope symbols and all all other scopes (local scopes). So
451 we need to select the right one to pass to add_symbol_to_list().
452 We do it by keeping a pointer to the correct list in list_in_scope.
454 FIXME: The original dwarf code just treated the file scope as the
455 first local scope, and all other local scopes as nested local
456 scopes, and worked fine. Check to see if we really need to
457 distinguish these in buildsym.c. */
458 struct pending
**list_in_scope
;
460 /* The abbrev table for this CU.
461 Normally this points to the abbrev table in the objfile.
462 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
463 struct abbrev_table
*abbrev_table
;
465 /* Hash table holding all the loaded partial DIEs
466 with partial_die->offset.SECT_OFF as hash. */
469 /* Storage for things with the same lifetime as this read-in compilation
470 unit, including partial DIEs. */
471 struct obstack comp_unit_obstack
;
473 /* When multiple dwarf2_cu structures are living in memory, this field
474 chains them all together, so that they can be released efficiently.
475 We will probably also want a generation counter so that most-recently-used
476 compilation units are cached... */
477 struct dwarf2_per_cu_data
*read_in_chain
;
479 /* Backlink to our per_cu entry. */
480 struct dwarf2_per_cu_data
*per_cu
;
482 /* How many compilation units ago was this CU last referenced? */
485 /* A hash table of DIE cu_offset for following references with
486 die_info->offset.sect_off as hash. */
489 /* Full DIEs if read in. */
490 struct die_info
*dies
;
492 /* A set of pointers to dwarf2_per_cu_data objects for compilation
493 units referenced by this one. Only set during full symbol processing;
494 partial symbol tables do not have dependencies. */
497 /* Header data from the line table, during full symbol processing. */
498 struct line_header
*line_header
;
500 /* A list of methods which need to have physnames computed
501 after all type information has been read. */
502 VEC (delayed_method_info
) *method_list
;
504 /* To be copied to symtab->call_site_htab. */
505 htab_t call_site_htab
;
507 /* Non-NULL if this CU came from a DWO file.
508 There is an invariant here that is important to remember:
509 Except for attributes copied from the top level DIE in the "main"
510 (or "stub") file in preparation for reading the DWO file
511 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
512 Either there isn't a DWO file (in which case this is NULL and the point
513 is moot), or there is and either we're not going to read it (in which
514 case this is NULL) or there is and we are reading it (in which case this
516 struct dwo_unit
*dwo_unit
;
518 /* The DW_AT_addr_base attribute if present, zero otherwise
519 (zero is a valid value though).
520 Note this value comes from the Fission stub CU/TU's DIE. */
523 /* The DW_AT_ranges_base attribute if present, zero otherwise
524 (zero is a valid value though).
525 Note this value comes from the Fission stub CU/TU's DIE.
526 Also note that the value is zero in the non-DWO case so this value can
527 be used without needing to know whether DWO files are in use or not.
528 N.B. This does not apply to DW_AT_ranges appearing in
529 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
530 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
531 DW_AT_ranges_base *would* have to be applied, and we'd have to care
532 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
533 ULONGEST ranges_base
;
535 /* Mark used when releasing cached dies. */
536 unsigned int mark
: 1;
538 /* This CU references .debug_loc. See the symtab->locations_valid field.
539 This test is imperfect as there may exist optimized debug code not using
540 any location list and still facing inlining issues if handled as
541 unoptimized code. For a future better test see GCC PR other/32998. */
542 unsigned int has_loclist
: 1;
544 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
545 if all the producer_is_* fields are valid. This information is cached
546 because profiling CU expansion showed excessive time spent in
547 producer_is_gxx_lt_4_6. */
548 unsigned int checked_producer
: 1;
549 unsigned int producer_is_gxx_lt_4_6
: 1;
550 unsigned int producer_is_gcc_lt_4_3
: 1;
551 unsigned int producer_is_icc
: 1;
553 /* When set, the file that we're processing is known to have
554 debugging info for C++ namespaces. GCC 3.3.x did not produce
555 this information, but later versions do. */
557 unsigned int processing_has_namespace_info
: 1;
560 /* Persistent data held for a compilation unit, even when not
561 processing it. We put a pointer to this structure in the
562 read_symtab_private field of the psymtab. */
564 struct dwarf2_per_cu_data
566 /* The start offset and length of this compilation unit.
567 NOTE: Unlike comp_unit_head.length, this length includes
569 If the DIE refers to a DWO file, this is always of the original die,
574 /* Flag indicating this compilation unit will be read in before
575 any of the current compilation units are processed. */
576 unsigned int queued
: 1;
578 /* This flag will be set when reading partial DIEs if we need to load
579 absolutely all DIEs for this compilation unit, instead of just the ones
580 we think are interesting. It gets set if we look for a DIE in the
581 hash table and don't find it. */
582 unsigned int load_all_dies
: 1;
584 /* Non-zero if this CU is from .debug_types.
585 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
587 unsigned int is_debug_types
: 1;
589 /* Non-zero if this CU is from the .dwz file. */
590 unsigned int is_dwz
: 1;
592 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
593 This flag is only valid if is_debug_types is true.
594 We can't read a CU directly from a DWO file: There are required
595 attributes in the stub. */
596 unsigned int reading_dwo_directly
: 1;
598 /* Non-zero if the TU has been read.
599 This is used to assist the "Stay in DWO Optimization" for Fission:
600 When reading a DWO, it's faster to read TUs from the DWO instead of
601 fetching them from random other DWOs (due to comdat folding).
602 If the TU has already been read, the optimization is unnecessary
603 (and unwise - we don't want to change where gdb thinks the TU lives
605 This flag is only valid if is_debug_types is true. */
606 unsigned int tu_read
: 1;
608 /* The section this CU/TU lives in.
609 If the DIE refers to a DWO file, this is always the original die,
611 struct dwarf2_section_info
*section
;
613 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
614 of the CU cache it gets reset to NULL again. This is left as NULL for
615 dummy CUs (a CU header, but nothing else). */
616 struct dwarf2_cu
*cu
;
618 /* The corresponding objfile.
619 Normally we can get the objfile from dwarf2_per_objfile.
620 However we can enter this file with just a "per_cu" handle. */
621 struct objfile
*objfile
;
623 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
624 is active. Otherwise, the 'psymtab' field is active. */
627 /* The partial symbol table associated with this compilation unit,
628 or NULL for unread partial units. */
629 struct partial_symtab
*psymtab
;
631 /* Data needed by the "quick" functions. */
632 struct dwarf2_per_cu_quick_data
*quick
;
635 /* The CUs we import using DW_TAG_imported_unit. This is filled in
636 while reading psymtabs, used to compute the psymtab dependencies,
637 and then cleared. Then it is filled in again while reading full
638 symbols, and only deleted when the objfile is destroyed.
640 This is also used to work around a difference between the way gold
641 generates .gdb_index version <=7 and the way gdb does. Arguably this
642 is a gold bug. For symbols coming from TUs, gold records in the index
643 the CU that includes the TU instead of the TU itself. This breaks
644 dw2_lookup_symbol: It assumes that if the index says symbol X lives
645 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
646 will find X. Alas TUs live in their own symtab, so after expanding CU Y
647 we need to look in TU Z to find X. Fortunately, this is akin to
648 DW_TAG_imported_unit, so we just use the same mechanism: For
649 .gdb_index version <=7 this also records the TUs that the CU referred
650 to. Concurrently with this change gdb was modified to emit version 8
651 indices so we only pay a price for gold generated indices.
652 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
653 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
656 /* Entry in the signatured_types hash table. */
658 struct signatured_type
660 /* The "per_cu" object of this type.
661 This struct is used iff per_cu.is_debug_types.
662 N.B.: This is the first member so that it's easy to convert pointers
664 struct dwarf2_per_cu_data per_cu
;
666 /* The type's signature. */
669 /* Offset in the TU of the type's DIE, as read from the TU header.
670 If this TU is a DWO stub and the definition lives in a DWO file
671 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
672 cu_offset type_offset_in_tu
;
674 /* Offset in the section of the type's DIE.
675 If the definition lives in a DWO file, this is the offset in the
676 .debug_types.dwo section.
677 The value is zero until the actual value is known.
678 Zero is otherwise not a valid section offset. */
679 sect_offset type_offset_in_section
;
681 /* Type units are grouped by their DW_AT_stmt_list entry so that they
682 can share them. This points to the containing symtab. */
683 struct type_unit_group
*type_unit_group
;
686 The first time we encounter this type we fully read it in and install it
687 in the symbol tables. Subsequent times we only need the type. */
690 /* Containing DWO unit.
691 This field is valid iff per_cu.reading_dwo_directly. */
692 struct dwo_unit
*dwo_unit
;
695 typedef struct signatured_type
*sig_type_ptr
;
696 DEF_VEC_P (sig_type_ptr
);
698 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
699 This includes type_unit_group and quick_file_names. */
701 struct stmt_list_hash
703 /* The DWO unit this table is from or NULL if there is none. */
704 struct dwo_unit
*dwo_unit
;
706 /* Offset in .debug_line or .debug_line.dwo. */
707 sect_offset line_offset
;
710 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
711 an object of this type. */
713 struct type_unit_group
715 /* dwarf2read.c's main "handle" on a TU symtab.
716 To simplify things we create an artificial CU that "includes" all the
717 type units using this stmt_list so that the rest of the code still has
718 a "per_cu" handle on the symtab.
719 This PER_CU is recognized by having no section. */
720 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
721 struct dwarf2_per_cu_data per_cu
;
723 /* The TUs that share this DW_AT_stmt_list entry.
724 This is added to while parsing type units to build partial symtabs,
725 and is deleted afterwards and not used again. */
726 VEC (sig_type_ptr
) *tus
;
728 /* The compunit symtab.
729 Type units in a group needn't all be defined in the same source file,
730 so we create an essentially anonymous symtab as the compunit symtab. */
731 struct compunit_symtab
*compunit_symtab
;
733 /* The data used to construct the hash key. */
734 struct stmt_list_hash hash
;
736 /* The number of symtabs from the line header.
737 The value here must match line_header.num_file_names. */
738 unsigned int num_symtabs
;
740 /* The symbol tables for this TU (obtained from the files listed in
742 WARNING: The order of entries here must match the order of entries
743 in the line header. After the first TU using this type_unit_group, the
744 line header for the subsequent TUs is recreated from this. This is done
745 because we need to use the same symtabs for each TU using the same
746 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
747 there's no guarantee the line header doesn't have duplicate entries. */
748 struct symtab
**symtabs
;
751 /* These sections are what may appear in a (real or virtual) DWO file. */
755 struct dwarf2_section_info abbrev
;
756 struct dwarf2_section_info line
;
757 struct dwarf2_section_info loc
;
758 struct dwarf2_section_info macinfo
;
759 struct dwarf2_section_info macro
;
760 struct dwarf2_section_info str
;
761 struct dwarf2_section_info str_offsets
;
762 /* In the case of a virtual DWO file, these two are unused. */
763 struct dwarf2_section_info info
;
764 VEC (dwarf2_section_info_def
) *types
;
767 /* CUs/TUs in DWP/DWO files. */
771 /* Backlink to the containing struct dwo_file. */
772 struct dwo_file
*dwo_file
;
774 /* The "id" that distinguishes this CU/TU.
775 .debug_info calls this "dwo_id", .debug_types calls this "signature".
776 Since signatures came first, we stick with it for consistency. */
779 /* The section this CU/TU lives in, in the DWO file. */
780 struct dwarf2_section_info
*section
;
782 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
786 /* For types, offset in the type's DIE of the type defined by this TU. */
787 cu_offset type_offset_in_tu
;
790 /* include/dwarf2.h defines the DWP section codes.
791 It defines a max value but it doesn't define a min value, which we
792 use for error checking, so provide one. */
794 enum dwp_v2_section_ids
799 /* Data for one DWO file.
801 This includes virtual DWO files (a virtual DWO file is a DWO file as it
802 appears in a DWP file). DWP files don't really have DWO files per se -
803 comdat folding of types "loses" the DWO file they came from, and from
804 a high level view DWP files appear to contain a mass of random types.
805 However, to maintain consistency with the non-DWP case we pretend DWP
806 files contain virtual DWO files, and we assign each TU with one virtual
807 DWO file (generally based on the line and abbrev section offsets -
808 a heuristic that seems to work in practice). */
812 /* The DW_AT_GNU_dwo_name attribute.
813 For virtual DWO files the name is constructed from the section offsets
814 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
815 from related CU+TUs. */
816 const char *dwo_name
;
818 /* The DW_AT_comp_dir attribute. */
819 const char *comp_dir
;
821 /* The bfd, when the file is open. Otherwise this is NULL.
822 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
825 /* The sections that make up this DWO file.
826 Remember that for virtual DWO files in DWP V2, these are virtual
827 sections (for lack of a better name). */
828 struct dwo_sections sections
;
830 /* The CU in the file.
831 We only support one because having more than one requires hacking the
832 dwo_name of each to match, which is highly unlikely to happen.
833 Doing this means all TUs can share comp_dir: We also assume that
834 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
837 /* Table of TUs in the file.
838 Each element is a struct dwo_unit. */
842 /* These sections are what may appear in a DWP file. */
846 /* These are used by both DWP version 1 and 2. */
847 struct dwarf2_section_info str
;
848 struct dwarf2_section_info cu_index
;
849 struct dwarf2_section_info tu_index
;
851 /* These are only used by DWP version 2 files.
852 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
853 sections are referenced by section number, and are not recorded here.
854 In DWP version 2 there is at most one copy of all these sections, each
855 section being (effectively) comprised of the concatenation of all of the
856 individual sections that exist in the version 1 format.
857 To keep the code simple we treat each of these concatenated pieces as a
858 section itself (a virtual section?). */
859 struct dwarf2_section_info abbrev
;
860 struct dwarf2_section_info info
;
861 struct dwarf2_section_info line
;
862 struct dwarf2_section_info loc
;
863 struct dwarf2_section_info macinfo
;
864 struct dwarf2_section_info macro
;
865 struct dwarf2_section_info str_offsets
;
866 struct dwarf2_section_info types
;
869 /* These sections are what may appear in a virtual DWO file in DWP version 1.
870 A virtual DWO file is a DWO file as it appears in a DWP file. */
872 struct virtual_v1_dwo_sections
874 struct dwarf2_section_info abbrev
;
875 struct dwarf2_section_info line
;
876 struct dwarf2_section_info loc
;
877 struct dwarf2_section_info macinfo
;
878 struct dwarf2_section_info macro
;
879 struct dwarf2_section_info str_offsets
;
880 /* Each DWP hash table entry records one CU or one TU.
881 That is recorded here, and copied to dwo_unit.section. */
882 struct dwarf2_section_info info_or_types
;
885 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
886 In version 2, the sections of the DWO files are concatenated together
887 and stored in one section of that name. Thus each ELF section contains
888 several "virtual" sections. */
890 struct virtual_v2_dwo_sections
892 bfd_size_type abbrev_offset
;
893 bfd_size_type abbrev_size
;
895 bfd_size_type line_offset
;
896 bfd_size_type line_size
;
898 bfd_size_type loc_offset
;
899 bfd_size_type loc_size
;
901 bfd_size_type macinfo_offset
;
902 bfd_size_type macinfo_size
;
904 bfd_size_type macro_offset
;
905 bfd_size_type macro_size
;
907 bfd_size_type str_offsets_offset
;
908 bfd_size_type str_offsets_size
;
910 /* Each DWP hash table entry records one CU or one TU.
911 That is recorded here, and copied to dwo_unit.section. */
912 bfd_size_type info_or_types_offset
;
913 bfd_size_type info_or_types_size
;
916 /* Contents of DWP hash tables. */
918 struct dwp_hash_table
920 uint32_t version
, nr_columns
;
921 uint32_t nr_units
, nr_slots
;
922 const gdb_byte
*hash_table
, *unit_table
;
927 const gdb_byte
*indices
;
931 /* This is indexed by column number and gives the id of the section
933 #define MAX_NR_V2_DWO_SECTIONS \
934 (1 /* .debug_info or .debug_types */ \
935 + 1 /* .debug_abbrev */ \
936 + 1 /* .debug_line */ \
937 + 1 /* .debug_loc */ \
938 + 1 /* .debug_str_offsets */ \
939 + 1 /* .debug_macro or .debug_macinfo */)
940 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
941 const gdb_byte
*offsets
;
942 const gdb_byte
*sizes
;
947 /* Data for one DWP file. */
951 /* Name of the file. */
954 /* File format version. */
960 /* Section info for this file. */
961 struct dwp_sections sections
;
963 /* Table of CUs in the file. */
964 const struct dwp_hash_table
*cus
;
966 /* Table of TUs in the file. */
967 const struct dwp_hash_table
*tus
;
969 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
973 /* Table to map ELF section numbers to their sections.
974 This is only needed for the DWP V1 file format. */
975 unsigned int num_sections
;
976 asection
**elf_sections
;
979 /* This represents a '.dwz' file. */
983 /* A dwz file can only contain a few sections. */
984 struct dwarf2_section_info abbrev
;
985 struct dwarf2_section_info info
;
986 struct dwarf2_section_info str
;
987 struct dwarf2_section_info line
;
988 struct dwarf2_section_info macro
;
989 struct dwarf2_section_info gdb_index
;
995 /* Struct used to pass misc. parameters to read_die_and_children, et
996 al. which are used for both .debug_info and .debug_types dies.
997 All parameters here are unchanging for the life of the call. This
998 struct exists to abstract away the constant parameters of die reading. */
1000 struct die_reader_specs
1002 /* The bfd of die_section. */
1005 /* The CU of the DIE we are parsing. */
1006 struct dwarf2_cu
*cu
;
1008 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1009 struct dwo_file
*dwo_file
;
1011 /* The section the die comes from.
1012 This is either .debug_info or .debug_types, or the .dwo variants. */
1013 struct dwarf2_section_info
*die_section
;
1015 /* die_section->buffer. */
1016 const gdb_byte
*buffer
;
1018 /* The end of the buffer. */
1019 const gdb_byte
*buffer_end
;
1021 /* The value of the DW_AT_comp_dir attribute. */
1022 const char *comp_dir
;
1025 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1026 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1027 const gdb_byte
*info_ptr
,
1028 struct die_info
*comp_unit_die
,
1035 unsigned int dir_index
;
1036 unsigned int mod_time
;
1037 unsigned int length
;
1038 /* Non-zero if referenced by the Line Number Program. */
1040 /* The associated symbol table, if any. */
1041 struct symtab
*symtab
;
1044 /* The line number information for a compilation unit (found in the
1045 .debug_line section) begins with a "statement program header",
1046 which contains the following information. */
1049 /* Offset of line number information in .debug_line section. */
1052 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1053 unsigned offset_in_dwz
: 1;
1055 unsigned int total_length
;
1056 unsigned short version
;
1057 unsigned int header_length
;
1058 unsigned char minimum_instruction_length
;
1059 unsigned char maximum_ops_per_instruction
;
1060 unsigned char default_is_stmt
;
1062 unsigned char line_range
;
1063 unsigned char opcode_base
;
1065 /* standard_opcode_lengths[i] is the number of operands for the
1066 standard opcode whose value is i. This means that
1067 standard_opcode_lengths[0] is unused, and the last meaningful
1068 element is standard_opcode_lengths[opcode_base - 1]. */
1069 unsigned char *standard_opcode_lengths
;
1071 /* The include_directories table. NOTE! These strings are not
1072 allocated with xmalloc; instead, they are pointers into
1073 debug_line_buffer. If you try to free them, `free' will get
1075 unsigned int num_include_dirs
, include_dirs_size
;
1076 const char **include_dirs
;
1078 /* The file_names table. NOTE! These strings are not allocated
1079 with xmalloc; instead, they are pointers into debug_line_buffer.
1080 Don't try to free them directly. */
1081 unsigned int num_file_names
, file_names_size
;
1082 struct file_entry
*file_names
;
1084 /* The start and end of the statement program following this
1085 header. These point into dwarf2_per_objfile->line_buffer. */
1086 const gdb_byte
*statement_program_start
, *statement_program_end
;
1089 /* When we construct a partial symbol table entry we only
1090 need this much information. */
1091 struct partial_die_info
1093 /* Offset of this DIE. */
1096 /* DWARF-2 tag for this DIE. */
1097 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1099 /* Assorted flags describing the data found in this DIE. */
1100 unsigned int has_children
: 1;
1101 unsigned int is_external
: 1;
1102 unsigned int is_declaration
: 1;
1103 unsigned int has_type
: 1;
1104 unsigned int has_specification
: 1;
1105 unsigned int has_pc_info
: 1;
1106 unsigned int may_be_inlined
: 1;
1108 /* Flag set if the SCOPE field of this structure has been
1110 unsigned int scope_set
: 1;
1112 /* Flag set if the DIE has a byte_size attribute. */
1113 unsigned int has_byte_size
: 1;
1115 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1116 unsigned int has_const_value
: 1;
1118 /* Flag set if any of the DIE's children are template arguments. */
1119 unsigned int has_template_arguments
: 1;
1121 /* Flag set if fixup_partial_die has been called on this die. */
1122 unsigned int fixup_called
: 1;
1124 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1125 unsigned int is_dwz
: 1;
1127 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1128 unsigned int spec_is_dwz
: 1;
1130 /* The name of this DIE. Normally the value of DW_AT_name, but
1131 sometimes a default name for unnamed DIEs. */
1134 /* The linkage name, if present. */
1135 const char *linkage_name
;
1137 /* The scope to prepend to our children. This is generally
1138 allocated on the comp_unit_obstack, so will disappear
1139 when this compilation unit leaves the cache. */
1142 /* Some data associated with the partial DIE. The tag determines
1143 which field is live. */
1146 /* The location description associated with this DIE, if any. */
1147 struct dwarf_block
*locdesc
;
1148 /* The offset of an import, for DW_TAG_imported_unit. */
1152 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1156 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1157 DW_AT_sibling, if any. */
1158 /* NOTE: This member isn't strictly necessary, read_partial_die could
1159 return DW_AT_sibling values to its caller load_partial_dies. */
1160 const gdb_byte
*sibling
;
1162 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1163 DW_AT_specification (or DW_AT_abstract_origin or
1164 DW_AT_extension). */
1165 sect_offset spec_offset
;
1167 /* Pointers to this DIE's parent, first child, and next sibling,
1169 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1172 /* This data structure holds the information of an abbrev. */
1175 unsigned int number
; /* number identifying abbrev */
1176 enum dwarf_tag tag
; /* dwarf tag */
1177 unsigned short has_children
; /* boolean */
1178 unsigned short num_attrs
; /* number of attributes */
1179 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1180 struct abbrev_info
*next
; /* next in chain */
1185 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1186 ENUM_BITFIELD(dwarf_form
) form
: 16;
1189 /* Size of abbrev_table.abbrev_hash_table. */
1190 #define ABBREV_HASH_SIZE 121
1192 /* Top level data structure to contain an abbreviation table. */
1196 /* Where the abbrev table came from.
1197 This is used as a sanity check when the table is used. */
1200 /* Storage for the abbrev table. */
1201 struct obstack abbrev_obstack
;
1203 /* Hash table of abbrevs.
1204 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1205 It could be statically allocated, but the previous code didn't so we
1207 struct abbrev_info
**abbrevs
;
1210 /* Attributes have a name and a value. */
1213 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1214 ENUM_BITFIELD(dwarf_form
) form
: 15;
1216 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1217 field should be in u.str (existing only for DW_STRING) but it is kept
1218 here for better struct attribute alignment. */
1219 unsigned int string_is_canonical
: 1;
1224 struct dwarf_block
*blk
;
1233 /* This data structure holds a complete die structure. */
1236 /* DWARF-2 tag for this DIE. */
1237 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1239 /* Number of attributes */
1240 unsigned char num_attrs
;
1242 /* True if we're presently building the full type name for the
1243 type derived from this DIE. */
1244 unsigned char building_fullname
: 1;
1246 /* True if this die is in process. PR 16581. */
1247 unsigned char in_process
: 1;
1250 unsigned int abbrev
;
1252 /* Offset in .debug_info or .debug_types section. */
1255 /* The dies in a compilation unit form an n-ary tree. PARENT
1256 points to this die's parent; CHILD points to the first child of
1257 this node; and all the children of a given node are chained
1258 together via their SIBLING fields. */
1259 struct die_info
*child
; /* Its first child, if any. */
1260 struct die_info
*sibling
; /* Its next sibling, if any. */
1261 struct die_info
*parent
; /* Its parent, if any. */
1263 /* An array of attributes, with NUM_ATTRS elements. There may be
1264 zero, but it's not common and zero-sized arrays are not
1265 sufficiently portable C. */
1266 struct attribute attrs
[1];
1269 /* Get at parts of an attribute structure. */
1271 #define DW_STRING(attr) ((attr)->u.str)
1272 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1273 #define DW_UNSND(attr) ((attr)->u.unsnd)
1274 #define DW_BLOCK(attr) ((attr)->u.blk)
1275 #define DW_SND(attr) ((attr)->u.snd)
1276 #define DW_ADDR(attr) ((attr)->u.addr)
1277 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1279 /* Blocks are a bunch of untyped bytes. */
1284 /* Valid only if SIZE is not zero. */
1285 const gdb_byte
*data
;
1288 #ifndef ATTR_ALLOC_CHUNK
1289 #define ATTR_ALLOC_CHUNK 4
1292 /* Allocate fields for structs, unions and enums in this size. */
1293 #ifndef DW_FIELD_ALLOC_CHUNK
1294 #define DW_FIELD_ALLOC_CHUNK 4
1297 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1298 but this would require a corresponding change in unpack_field_as_long
1300 static int bits_per_byte
= 8;
1304 struct nextfield
*next
;
1312 struct nextfnfield
*next
;
1313 struct fn_field fnfield
;
1320 struct nextfnfield
*head
;
1323 struct typedef_field_list
1325 struct typedef_field field
;
1326 struct typedef_field_list
*next
;
1329 /* The routines that read and process dies for a C struct or C++ class
1330 pass lists of data member fields and lists of member function fields
1331 in an instance of a field_info structure, as defined below. */
1334 /* List of data member and baseclasses fields. */
1335 struct nextfield
*fields
, *baseclasses
;
1337 /* Number of fields (including baseclasses). */
1340 /* Number of baseclasses. */
1343 /* Set if the accesibility of one of the fields is not public. */
1344 int non_public_fields
;
1346 /* Member function fields array, entries are allocated in the order they
1347 are encountered in the object file. */
1348 struct nextfnfield
*fnfields
;
1350 /* Member function fieldlist array, contains name of possibly overloaded
1351 member function, number of overloaded member functions and a pointer
1352 to the head of the member function field chain. */
1353 struct fnfieldlist
*fnfieldlists
;
1355 /* Number of entries in the fnfieldlists array. */
1358 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1359 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1360 struct typedef_field_list
*typedef_field_list
;
1361 unsigned typedef_field_list_count
;
1364 /* One item on the queue of compilation units to read in full symbols
1366 struct dwarf2_queue_item
1368 struct dwarf2_per_cu_data
*per_cu
;
1369 enum language pretend_language
;
1370 struct dwarf2_queue_item
*next
;
1373 /* The current queue. */
1374 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1376 /* Loaded secondary compilation units are kept in memory until they
1377 have not been referenced for the processing of this many
1378 compilation units. Set this to zero to disable caching. Cache
1379 sizes of up to at least twenty will improve startup time for
1380 typical inter-CU-reference binaries, at an obvious memory cost. */
1381 static int dwarf_max_cache_age
= 5;
1383 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1384 struct cmd_list_element
*c
, const char *value
)
1386 fprintf_filtered (file
, _("The upper bound on the age of cached "
1387 "DWARF compilation units is %s.\n"),
1391 /* local function prototypes */
1393 static const char *get_section_name (const struct dwarf2_section_info
*);
1395 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1397 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1399 static void dwarf2_find_base_address (struct die_info
*die
,
1400 struct dwarf2_cu
*cu
);
1402 static struct partial_symtab
*create_partial_symtab
1403 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1405 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1407 static void scan_partial_symbols (struct partial_die_info
*,
1408 CORE_ADDR
*, CORE_ADDR
*,
1409 int, struct dwarf2_cu
*);
1411 static void add_partial_symbol (struct partial_die_info
*,
1412 struct dwarf2_cu
*);
1414 static void add_partial_namespace (struct partial_die_info
*pdi
,
1415 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1416 int set_addrmap
, struct dwarf2_cu
*cu
);
1418 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1419 CORE_ADDR
*highpc
, int set_addrmap
,
1420 struct dwarf2_cu
*cu
);
1422 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1423 struct dwarf2_cu
*cu
);
1425 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1426 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1427 int need_pc
, struct dwarf2_cu
*cu
);
1429 static void dwarf2_read_symtab (struct partial_symtab
*,
1432 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1434 static struct abbrev_info
*abbrev_table_lookup_abbrev
1435 (const struct abbrev_table
*, unsigned int);
1437 static struct abbrev_table
*abbrev_table_read_table
1438 (struct dwarf2_section_info
*, sect_offset
);
1440 static void abbrev_table_free (struct abbrev_table
*);
1442 static void abbrev_table_free_cleanup (void *);
1444 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1445 struct dwarf2_section_info
*);
1447 static void dwarf2_free_abbrev_table (void *);
1449 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1451 static struct partial_die_info
*load_partial_dies
1452 (const struct die_reader_specs
*, const gdb_byte
*, int);
1454 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1455 struct partial_die_info
*,
1456 struct abbrev_info
*,
1460 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1461 struct dwarf2_cu
*);
1463 static void fixup_partial_die (struct partial_die_info
*,
1464 struct dwarf2_cu
*);
1466 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1467 struct attribute
*, struct attr_abbrev
*,
1470 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1472 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1474 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1476 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1478 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1480 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1483 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1485 static LONGEST read_checked_initial_length_and_offset
1486 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1487 unsigned int *, unsigned int *);
1489 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1490 const struct comp_unit_head
*,
1493 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1495 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1498 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1500 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1502 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1503 const struct comp_unit_head
*,
1506 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1508 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1510 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1512 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1516 static const char *read_str_index (const struct die_reader_specs
*reader
,
1517 ULONGEST str_index
);
1519 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1521 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1522 struct dwarf2_cu
*);
1524 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1527 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1528 struct dwarf2_cu
*cu
);
1530 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1532 static struct die_info
*die_specification (struct die_info
*die
,
1533 struct dwarf2_cu
**);
1535 static void free_line_header (struct line_header
*lh
);
1537 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1538 struct dwarf2_cu
*cu
);
1540 static void dwarf_decode_lines (struct line_header
*, const char *,
1541 struct dwarf2_cu
*, struct partial_symtab
*,
1542 CORE_ADDR
, int decode_mapping
);
1544 static void dwarf2_start_subfile (const char *, const char *);
1546 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1547 const char *, const char *,
1550 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1551 struct dwarf2_cu
*);
1553 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*, struct symbol
*);
1556 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1557 struct dwarf2_cu
*);
1559 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1562 struct obstack
*obstack
,
1563 struct dwarf2_cu
*cu
, LONGEST
*value
,
1564 const gdb_byte
**bytes
,
1565 struct dwarf2_locexpr_baton
**baton
);
1567 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1569 static int need_gnat_info (struct dwarf2_cu
*);
1571 static struct type
*die_descriptive_type (struct die_info
*,
1572 struct dwarf2_cu
*);
1574 static void set_descriptive_type (struct type
*, struct die_info
*,
1575 struct dwarf2_cu
*);
1577 static struct type
*die_containing_type (struct die_info
*,
1578 struct dwarf2_cu
*);
1580 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1581 struct dwarf2_cu
*);
1583 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1585 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1587 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1589 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1590 const char *suffix
, int physname
,
1591 struct dwarf2_cu
*cu
);
1593 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1595 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1597 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1599 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1601 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1603 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1604 struct dwarf2_cu
*, struct partial_symtab
*);
1606 static int dwarf2_get_pc_bounds (struct die_info
*,
1607 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1608 struct partial_symtab
*);
1610 static void get_scope_pc_bounds (struct die_info
*,
1611 CORE_ADDR
*, CORE_ADDR
*,
1612 struct dwarf2_cu
*);
1614 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1615 CORE_ADDR
, struct dwarf2_cu
*);
1617 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1618 struct dwarf2_cu
*);
1620 static void dwarf2_attach_fields_to_type (struct field_info
*,
1621 struct type
*, struct dwarf2_cu
*);
1623 static void dwarf2_add_member_fn (struct field_info
*,
1624 struct die_info
*, struct type
*,
1625 struct dwarf2_cu
*);
1627 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1629 struct dwarf2_cu
*);
1631 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1633 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1635 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1637 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1639 static struct using_direct
**using_directives (enum language
);
1641 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1643 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1645 static struct type
*read_module_type (struct die_info
*die
,
1646 struct dwarf2_cu
*cu
);
1648 static const char *namespace_name (struct die_info
*die
,
1649 int *is_anonymous
, struct dwarf2_cu
*);
1651 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1653 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1655 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1656 struct dwarf2_cu
*);
1658 static struct die_info
*read_die_and_siblings_1
1659 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1662 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1663 const gdb_byte
*info_ptr
,
1664 const gdb_byte
**new_info_ptr
,
1665 struct die_info
*parent
);
1667 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1668 struct die_info
**, const gdb_byte
*,
1671 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1672 struct die_info
**, const gdb_byte
*,
1675 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1677 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1680 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1682 static const char *dwarf2_full_name (const char *name
,
1683 struct die_info
*die
,
1684 struct dwarf2_cu
*cu
);
1686 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1687 struct dwarf2_cu
*cu
);
1689 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1690 struct dwarf2_cu
**);
1692 static const char *dwarf_tag_name (unsigned int);
1694 static const char *dwarf_attr_name (unsigned int);
1696 static const char *dwarf_form_name (unsigned int);
1698 static char *dwarf_bool_name (unsigned int);
1700 static const char *dwarf_type_encoding_name (unsigned int);
1702 static struct die_info
*sibling_die (struct die_info
*);
1704 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1706 static void dump_die_for_error (struct die_info
*);
1708 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1711 /*static*/ void dump_die (struct die_info
*, int max_level
);
1713 static void store_in_ref_table (struct die_info
*,
1714 struct dwarf2_cu
*);
1716 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1718 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1720 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1721 const struct attribute
*,
1722 struct dwarf2_cu
**);
1724 static struct die_info
*follow_die_ref (struct die_info
*,
1725 const struct attribute
*,
1726 struct dwarf2_cu
**);
1728 static struct die_info
*follow_die_sig (struct die_info
*,
1729 const struct attribute
*,
1730 struct dwarf2_cu
**);
1732 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1733 struct dwarf2_cu
*);
1735 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1736 const struct attribute
*,
1737 struct dwarf2_cu
*);
1739 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1741 static void read_signatured_type (struct signatured_type
*);
1743 /* memory allocation interface */
1745 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1747 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1749 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1751 static int attr_form_is_block (const struct attribute
*);
1753 static int attr_form_is_section_offset (const struct attribute
*);
1755 static int attr_form_is_constant (const struct attribute
*);
1757 static int attr_form_is_ref (const struct attribute
*);
1759 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1760 struct dwarf2_loclist_baton
*baton
,
1761 const struct attribute
*attr
);
1763 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1765 struct dwarf2_cu
*cu
,
1768 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1769 const gdb_byte
*info_ptr
,
1770 struct abbrev_info
*abbrev
);
1772 static void free_stack_comp_unit (void *);
1774 static hashval_t
partial_die_hash (const void *item
);
1776 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1778 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1779 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1781 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1782 struct dwarf2_per_cu_data
*per_cu
);
1784 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1785 struct die_info
*comp_unit_die
,
1786 enum language pretend_language
);
1788 static void free_heap_comp_unit (void *);
1790 static void free_cached_comp_units (void *);
1792 static void age_cached_comp_units (void);
1794 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1796 static struct type
*set_die_type (struct die_info
*, struct type
*,
1797 struct dwarf2_cu
*);
1799 static void create_all_comp_units (struct objfile
*);
1801 static int create_all_type_units (struct objfile
*);
1803 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1806 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1809 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1812 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1813 struct dwarf2_per_cu_data
*);
1815 static void dwarf2_mark (struct dwarf2_cu
*);
1817 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1819 static struct type
*get_die_type_at_offset (sect_offset
,
1820 struct dwarf2_per_cu_data
*);
1822 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1824 static void dwarf2_release_queue (void *dummy
);
1826 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1827 enum language pretend_language
);
1829 static void process_queue (void);
1831 static void find_file_and_directory (struct die_info
*die
,
1832 struct dwarf2_cu
*cu
,
1833 const char **name
, const char **comp_dir
);
1835 static char *file_full_name (int file
, struct line_header
*lh
,
1836 const char *comp_dir
);
1838 static const gdb_byte
*read_and_check_comp_unit_head
1839 (struct comp_unit_head
*header
,
1840 struct dwarf2_section_info
*section
,
1841 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1842 int is_debug_types_section
);
1844 static void init_cutu_and_read_dies
1845 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1846 int use_existing_cu
, int keep
,
1847 die_reader_func_ftype
*die_reader_func
, void *data
);
1849 static void init_cutu_and_read_dies_simple
1850 (struct dwarf2_per_cu_data
*this_cu
,
1851 die_reader_func_ftype
*die_reader_func
, void *data
);
1853 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1855 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1857 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1858 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1859 ULONGEST signature
, int is_debug_types
);
1861 static struct dwp_file
*get_dwp_file (void);
1863 static struct dwo_unit
*lookup_dwo_comp_unit
1864 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1866 static struct dwo_unit
*lookup_dwo_type_unit
1867 (struct signatured_type
*, const char *, const char *);
1869 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1871 static void free_dwo_file_cleanup (void *);
1873 static void process_cu_includes (void);
1875 static void check_producer (struct dwarf2_cu
*cu
);
1877 static void free_line_header_voidp (void *arg
);
1879 /* Various complaints about symbol reading that don't abort the process. */
1882 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1884 complaint (&symfile_complaints
,
1885 _("statement list doesn't fit in .debug_line section"));
1889 dwarf2_debug_line_missing_file_complaint (void)
1891 complaint (&symfile_complaints
,
1892 _(".debug_line section has line data without a file"));
1896 dwarf2_debug_line_missing_end_sequence_complaint (void)
1898 complaint (&symfile_complaints
,
1899 _(".debug_line section has line "
1900 "program sequence without an end"));
1904 dwarf2_complex_location_expr_complaint (void)
1906 complaint (&symfile_complaints
, _("location expression too complex"));
1910 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1913 complaint (&symfile_complaints
,
1914 _("const value length mismatch for '%s', got %d, expected %d"),
1919 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1921 complaint (&symfile_complaints
,
1922 _("debug info runs off end of %s section"
1924 get_section_name (section
),
1925 get_section_file_name (section
));
1929 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1931 complaint (&symfile_complaints
,
1932 _("macro debug info contains a "
1933 "malformed macro definition:\n`%s'"),
1938 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1940 complaint (&symfile_complaints
,
1941 _("invalid attribute class or form for '%s' in '%s'"),
1945 /* Hash function for line_header_hash. */
1948 line_header_hash (const struct line_header
*ofs
)
1950 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1953 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1956 line_header_hash_voidp (const void *item
)
1958 const struct line_header
*ofs
= item
;
1960 return line_header_hash (ofs
);
1963 /* Equality function for line_header_hash. */
1966 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1968 const struct line_header
*ofs_lhs
= item_lhs
;
1969 const struct line_header
*ofs_rhs
= item_rhs
;
1971 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1972 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1978 /* Convert VALUE between big- and little-endian. */
1980 byte_swap (offset_type value
)
1984 result
= (value
& 0xff) << 24;
1985 result
|= (value
& 0xff00) << 8;
1986 result
|= (value
& 0xff0000) >> 8;
1987 result
|= (value
& 0xff000000) >> 24;
1991 #define MAYBE_SWAP(V) byte_swap (V)
1994 #define MAYBE_SWAP(V) (V)
1995 #endif /* WORDS_BIGENDIAN */
1997 /* Read the given attribute value as an address, taking the attribute's
1998 form into account. */
2001 attr_value_as_address (struct attribute
*attr
)
2005 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2007 /* Aside from a few clearly defined exceptions, attributes that
2008 contain an address must always be in DW_FORM_addr form.
2009 Unfortunately, some compilers happen to be violating this
2010 requirement by encoding addresses using other forms, such
2011 as DW_FORM_data4 for example. For those broken compilers,
2012 we try to do our best, without any guarantee of success,
2013 to interpret the address correctly. It would also be nice
2014 to generate a complaint, but that would require us to maintain
2015 a list of legitimate cases where a non-address form is allowed,
2016 as well as update callers to pass in at least the CU's DWARF
2017 version. This is more overhead than what we're willing to
2018 expand for a pretty rare case. */
2019 addr
= DW_UNSND (attr
);
2022 addr
= DW_ADDR (attr
);
2027 /* The suffix for an index file. */
2028 #define INDEX_SUFFIX ".gdb-index"
2030 /* Try to locate the sections we need for DWARF 2 debugging
2031 information and return true if we have enough to do something.
2032 NAMES points to the dwarf2 section names, or is NULL if the standard
2033 ELF names are used. */
2036 dwarf2_has_info (struct objfile
*objfile
,
2037 const struct dwarf2_debug_sections
*names
)
2039 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2040 if (!dwarf2_per_objfile
)
2042 /* Initialize per-objfile state. */
2043 struct dwarf2_per_objfile
*data
2044 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
2046 memset (data
, 0, sizeof (*data
));
2047 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2048 dwarf2_per_objfile
= data
;
2050 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2052 dwarf2_per_objfile
->objfile
= objfile
;
2054 return (!dwarf2_per_objfile
->info
.is_virtual
2055 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
2056 && !dwarf2_per_objfile
->abbrev
.is_virtual
2057 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
2060 /* Return the containing section of virtual section SECTION. */
2062 static struct dwarf2_section_info
*
2063 get_containing_section (const struct dwarf2_section_info
*section
)
2065 gdb_assert (section
->is_virtual
);
2066 return section
->s
.containing_section
;
2069 /* Return the bfd owner of SECTION. */
2072 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2074 if (section
->is_virtual
)
2076 section
= get_containing_section (section
);
2077 gdb_assert (!section
->is_virtual
);
2079 return section
->s
.asection
->owner
;
2082 /* Return the bfd section of SECTION.
2083 Returns NULL if the section is not present. */
2086 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2088 if (section
->is_virtual
)
2090 section
= get_containing_section (section
);
2091 gdb_assert (!section
->is_virtual
);
2093 return section
->s
.asection
;
2096 /* Return the name of SECTION. */
2099 get_section_name (const struct dwarf2_section_info
*section
)
2101 asection
*sectp
= get_section_bfd_section (section
);
2103 gdb_assert (sectp
!= NULL
);
2104 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2107 /* Return the name of the file SECTION is in. */
2110 get_section_file_name (const struct dwarf2_section_info
*section
)
2112 bfd
*abfd
= get_section_bfd_owner (section
);
2114 return bfd_get_filename (abfd
);
2117 /* Return the id of SECTION.
2118 Returns 0 if SECTION doesn't exist. */
2121 get_section_id (const struct dwarf2_section_info
*section
)
2123 asection
*sectp
= get_section_bfd_section (section
);
2130 /* Return the flags of SECTION.
2131 SECTION (or containing section if this is a virtual section) must exist. */
2134 get_section_flags (const struct dwarf2_section_info
*section
)
2136 asection
*sectp
= get_section_bfd_section (section
);
2138 gdb_assert (sectp
!= NULL
);
2139 return bfd_get_section_flags (sectp
->owner
, sectp
);
2142 /* When loading sections, we look either for uncompressed section or for
2143 compressed section names. */
2146 section_is_p (const char *section_name
,
2147 const struct dwarf2_section_names
*names
)
2149 if (names
->normal
!= NULL
2150 && strcmp (section_name
, names
->normal
) == 0)
2152 if (names
->compressed
!= NULL
2153 && strcmp (section_name
, names
->compressed
) == 0)
2158 /* This function is mapped across the sections and remembers the
2159 offset and size of each of the debugging sections we are interested
2163 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2165 const struct dwarf2_debug_sections
*names
;
2166 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2169 names
= &dwarf2_elf_names
;
2171 names
= (const struct dwarf2_debug_sections
*) vnames
;
2173 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2176 else if (section_is_p (sectp
->name
, &names
->info
))
2178 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2179 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2181 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2183 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2184 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2186 else if (section_is_p (sectp
->name
, &names
->line
))
2188 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2189 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2191 else if (section_is_p (sectp
->name
, &names
->loc
))
2193 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2194 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2196 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2198 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2199 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2201 else if (section_is_p (sectp
->name
, &names
->macro
))
2203 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2204 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2206 else if (section_is_p (sectp
->name
, &names
->str
))
2208 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2209 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2211 else if (section_is_p (sectp
->name
, &names
->addr
))
2213 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2214 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2216 else if (section_is_p (sectp
->name
, &names
->frame
))
2218 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2219 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2221 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2223 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2224 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2226 else if (section_is_p (sectp
->name
, &names
->ranges
))
2228 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2229 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2231 else if (section_is_p (sectp
->name
, &names
->types
))
2233 struct dwarf2_section_info type_section
;
2235 memset (&type_section
, 0, sizeof (type_section
));
2236 type_section
.s
.asection
= sectp
;
2237 type_section
.size
= bfd_get_section_size (sectp
);
2239 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2242 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2244 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2245 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2248 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2249 && bfd_section_vma (abfd
, sectp
) == 0)
2250 dwarf2_per_objfile
->has_section_at_zero
= 1;
2253 /* A helper function that decides whether a section is empty,
2257 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2259 if (section
->is_virtual
)
2260 return section
->size
== 0;
2261 return section
->s
.asection
== NULL
|| section
->size
== 0;
2264 /* Read the contents of the section INFO.
2265 OBJFILE is the main object file, but not necessarily the file where
2266 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2268 If the section is compressed, uncompress it before returning. */
2271 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2275 gdb_byte
*buf
, *retbuf
;
2279 info
->buffer
= NULL
;
2282 if (dwarf2_section_empty_p (info
))
2285 sectp
= get_section_bfd_section (info
);
2287 /* If this is a virtual section we need to read in the real one first. */
2288 if (info
->is_virtual
)
2290 struct dwarf2_section_info
*containing_section
=
2291 get_containing_section (info
);
2293 gdb_assert (sectp
!= NULL
);
2294 if ((sectp
->flags
& SEC_RELOC
) != 0)
2296 error (_("Dwarf Error: DWP format V2 with relocations is not"
2297 " supported in section %s [in module %s]"),
2298 get_section_name (info
), get_section_file_name (info
));
2300 dwarf2_read_section (objfile
, containing_section
);
2301 /* Other code should have already caught virtual sections that don't
2303 gdb_assert (info
->virtual_offset
+ info
->size
2304 <= containing_section
->size
);
2305 /* If the real section is empty or there was a problem reading the
2306 section we shouldn't get here. */
2307 gdb_assert (containing_section
->buffer
!= NULL
);
2308 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2312 /* If the section has relocations, we must read it ourselves.
2313 Otherwise we attach it to the BFD. */
2314 if ((sectp
->flags
& SEC_RELOC
) == 0)
2316 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2320 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2323 /* When debugging .o files, we may need to apply relocations; see
2324 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2325 We never compress sections in .o files, so we only need to
2326 try this when the section is not compressed. */
2327 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2330 info
->buffer
= retbuf
;
2334 abfd
= get_section_bfd_owner (info
);
2335 gdb_assert (abfd
!= NULL
);
2337 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2338 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2340 error (_("Dwarf Error: Can't read DWARF data"
2341 " in section %s [in module %s]"),
2342 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2346 /* A helper function that returns the size of a section in a safe way.
2347 If you are positive that the section has been read before using the
2348 size, then it is safe to refer to the dwarf2_section_info object's
2349 "size" field directly. In other cases, you must call this
2350 function, because for compressed sections the size field is not set
2351 correctly until the section has been read. */
2353 static bfd_size_type
2354 dwarf2_section_size (struct objfile
*objfile
,
2355 struct dwarf2_section_info
*info
)
2358 dwarf2_read_section (objfile
, info
);
2362 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2366 dwarf2_get_section_info (struct objfile
*objfile
,
2367 enum dwarf2_section_enum sect
,
2368 asection
**sectp
, const gdb_byte
**bufp
,
2369 bfd_size_type
*sizep
)
2371 struct dwarf2_per_objfile
*data
2372 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2373 struct dwarf2_section_info
*info
;
2375 /* We may see an objfile without any DWARF, in which case we just
2386 case DWARF2_DEBUG_FRAME
:
2387 info
= &data
->frame
;
2389 case DWARF2_EH_FRAME
:
2390 info
= &data
->eh_frame
;
2393 gdb_assert_not_reached ("unexpected section");
2396 dwarf2_read_section (objfile
, info
);
2398 *sectp
= get_section_bfd_section (info
);
2399 *bufp
= info
->buffer
;
2400 *sizep
= info
->size
;
2403 /* A helper function to find the sections for a .dwz file. */
2406 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2408 struct dwz_file
*dwz_file
= arg
;
2410 /* Note that we only support the standard ELF names, because .dwz
2411 is ELF-only (at the time of writing). */
2412 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2414 dwz_file
->abbrev
.s
.asection
= sectp
;
2415 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2417 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2419 dwz_file
->info
.s
.asection
= sectp
;
2420 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2422 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2424 dwz_file
->str
.s
.asection
= sectp
;
2425 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2427 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2429 dwz_file
->line
.s
.asection
= sectp
;
2430 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2432 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2434 dwz_file
->macro
.s
.asection
= sectp
;
2435 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2437 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2439 dwz_file
->gdb_index
.s
.asection
= sectp
;
2440 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2444 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2445 there is no .gnu_debugaltlink section in the file. Error if there
2446 is such a section but the file cannot be found. */
2448 static struct dwz_file
*
2449 dwarf2_get_dwz_file (void)
2453 struct cleanup
*cleanup
;
2454 const char *filename
;
2455 struct dwz_file
*result
;
2456 bfd_size_type buildid_len_arg
;
2460 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2461 return dwarf2_per_objfile
->dwz_file
;
2463 bfd_set_error (bfd_error_no_error
);
2464 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2465 &buildid_len_arg
, &buildid
);
2468 if (bfd_get_error () == bfd_error_no_error
)
2470 error (_("could not read '.gnu_debugaltlink' section: %s"),
2471 bfd_errmsg (bfd_get_error ()));
2473 cleanup
= make_cleanup (xfree
, data
);
2474 make_cleanup (xfree
, buildid
);
2476 buildid_len
= (size_t) buildid_len_arg
;
2478 filename
= (const char *) data
;
2479 if (!IS_ABSOLUTE_PATH (filename
))
2481 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2484 make_cleanup (xfree
, abs
);
2485 abs
= ldirname (abs
);
2486 make_cleanup (xfree
, abs
);
2488 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2489 make_cleanup (xfree
, rel
);
2493 /* First try the file name given in the section. If that doesn't
2494 work, try to use the build-id instead. */
2495 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2496 if (dwz_bfd
!= NULL
)
2498 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2500 gdb_bfd_unref (dwz_bfd
);
2505 if (dwz_bfd
== NULL
)
2506 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2508 if (dwz_bfd
== NULL
)
2509 error (_("could not find '.gnu_debugaltlink' file for %s"),
2510 objfile_name (dwarf2_per_objfile
->objfile
));
2512 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2514 result
->dwz_bfd
= dwz_bfd
;
2516 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2518 do_cleanups (cleanup
);
2520 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2521 dwarf2_per_objfile
->dwz_file
= result
;
2525 /* DWARF quick_symbols_functions support. */
2527 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2528 unique line tables, so we maintain a separate table of all .debug_line
2529 derived entries to support the sharing.
2530 All the quick functions need is the list of file names. We discard the
2531 line_header when we're done and don't need to record it here. */
2532 struct quick_file_names
2534 /* The data used to construct the hash key. */
2535 struct stmt_list_hash hash
;
2537 /* The number of entries in file_names, real_names. */
2538 unsigned int num_file_names
;
2540 /* The file names from the line table, after being run through
2542 const char **file_names
;
2544 /* The file names from the line table after being run through
2545 gdb_realpath. These are computed lazily. */
2546 const char **real_names
;
2549 /* When using the index (and thus not using psymtabs), each CU has an
2550 object of this type. This is used to hold information needed by
2551 the various "quick" methods. */
2552 struct dwarf2_per_cu_quick_data
2554 /* The file table. This can be NULL if there was no file table
2555 or it's currently not read in.
2556 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2557 struct quick_file_names
*file_names
;
2559 /* The corresponding symbol table. This is NULL if symbols for this
2560 CU have not yet been read. */
2561 struct compunit_symtab
*compunit_symtab
;
2563 /* A temporary mark bit used when iterating over all CUs in
2564 expand_symtabs_matching. */
2565 unsigned int mark
: 1;
2567 /* True if we've tried to read the file table and found there isn't one.
2568 There will be no point in trying to read it again next time. */
2569 unsigned int no_file_data
: 1;
2572 /* Utility hash function for a stmt_list_hash. */
2575 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2579 if (stmt_list_hash
->dwo_unit
!= NULL
)
2580 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2581 v
+= stmt_list_hash
->line_offset
.sect_off
;
2585 /* Utility equality function for a stmt_list_hash. */
2588 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2589 const struct stmt_list_hash
*rhs
)
2591 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2593 if (lhs
->dwo_unit
!= NULL
2594 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2597 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2600 /* Hash function for a quick_file_names. */
2603 hash_file_name_entry (const void *e
)
2605 const struct quick_file_names
*file_data
= e
;
2607 return hash_stmt_list_entry (&file_data
->hash
);
2610 /* Equality function for a quick_file_names. */
2613 eq_file_name_entry (const void *a
, const void *b
)
2615 const struct quick_file_names
*ea
= a
;
2616 const struct quick_file_names
*eb
= b
;
2618 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2621 /* Delete function for a quick_file_names. */
2624 delete_file_name_entry (void *e
)
2626 struct quick_file_names
*file_data
= e
;
2629 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2631 xfree ((void*) file_data
->file_names
[i
]);
2632 if (file_data
->real_names
)
2633 xfree ((void*) file_data
->real_names
[i
]);
2636 /* The space for the struct itself lives on objfile_obstack,
2637 so we don't free it here. */
2640 /* Create a quick_file_names hash table. */
2643 create_quick_file_names_table (unsigned int nr_initial_entries
)
2645 return htab_create_alloc (nr_initial_entries
,
2646 hash_file_name_entry
, eq_file_name_entry
,
2647 delete_file_name_entry
, xcalloc
, xfree
);
2650 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2651 have to be created afterwards. You should call age_cached_comp_units after
2652 processing PER_CU->CU. dw2_setup must have been already called. */
2655 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2657 if (per_cu
->is_debug_types
)
2658 load_full_type_unit (per_cu
);
2660 load_full_comp_unit (per_cu
, language_minimal
);
2662 if (per_cu
->cu
== NULL
)
2663 return; /* Dummy CU. */
2665 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2668 /* Read in the symbols for PER_CU. */
2671 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2673 struct cleanup
*back_to
;
2675 /* Skip type_unit_groups, reading the type units they contain
2676 is handled elsewhere. */
2677 if (IS_TYPE_UNIT_GROUP (per_cu
))
2680 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2682 if (dwarf2_per_objfile
->using_index
2683 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2684 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2686 queue_comp_unit (per_cu
, language_minimal
);
2689 /* If we just loaded a CU from a DWO, and we're working with an index
2690 that may badly handle TUs, load all the TUs in that DWO as well.
2691 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2692 if (!per_cu
->is_debug_types
2693 && per_cu
->cu
!= NULL
2694 && per_cu
->cu
->dwo_unit
!= NULL
2695 && dwarf2_per_objfile
->index_table
!= NULL
2696 && dwarf2_per_objfile
->index_table
->version
<= 7
2697 /* DWP files aren't supported yet. */
2698 && get_dwp_file () == NULL
)
2699 queue_and_load_all_dwo_tus (per_cu
);
2704 /* Age the cache, releasing compilation units that have not
2705 been used recently. */
2706 age_cached_comp_units ();
2708 do_cleanups (back_to
);
2711 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2712 the objfile from which this CU came. Returns the resulting symbol
2715 static struct compunit_symtab
*
2716 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2718 gdb_assert (dwarf2_per_objfile
->using_index
);
2719 if (!per_cu
->v
.quick
->compunit_symtab
)
2721 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2722 increment_reading_symtab ();
2723 dw2_do_instantiate_symtab (per_cu
);
2724 process_cu_includes ();
2725 do_cleanups (back_to
);
2728 return per_cu
->v
.quick
->compunit_symtab
;
2731 /* Return the CU/TU given its index.
2733 This is intended for loops like:
2735 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2736 + dwarf2_per_objfile->n_type_units); ++i)
2738 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2744 static struct dwarf2_per_cu_data
*
2745 dw2_get_cutu (int index
)
2747 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2749 index
-= dwarf2_per_objfile
->n_comp_units
;
2750 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2751 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2754 return dwarf2_per_objfile
->all_comp_units
[index
];
2757 /* Return the CU given its index.
2758 This differs from dw2_get_cutu in that it's for when you know INDEX
2761 static struct dwarf2_per_cu_data
*
2762 dw2_get_cu (int index
)
2764 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2766 return dwarf2_per_objfile
->all_comp_units
[index
];
2769 /* A helper for create_cus_from_index that handles a given list of
2773 create_cus_from_index_list (struct objfile
*objfile
,
2774 const gdb_byte
*cu_list
, offset_type n_elements
,
2775 struct dwarf2_section_info
*section
,
2781 for (i
= 0; i
< n_elements
; i
+= 2)
2783 struct dwarf2_per_cu_data
*the_cu
;
2784 ULONGEST offset
, length
;
2786 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2787 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2788 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2791 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2792 struct dwarf2_per_cu_data
);
2793 the_cu
->offset
.sect_off
= offset
;
2794 the_cu
->length
= length
;
2795 the_cu
->objfile
= objfile
;
2796 the_cu
->section
= section
;
2797 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2798 struct dwarf2_per_cu_quick_data
);
2799 the_cu
->is_dwz
= is_dwz
;
2800 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2804 /* Read the CU list from the mapped index, and use it to create all
2805 the CU objects for this objfile. */
2808 create_cus_from_index (struct objfile
*objfile
,
2809 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2810 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2812 struct dwz_file
*dwz
;
2814 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2815 dwarf2_per_objfile
->all_comp_units
2816 = obstack_alloc (&objfile
->objfile_obstack
,
2817 dwarf2_per_objfile
->n_comp_units
2818 * sizeof (struct dwarf2_per_cu_data
*));
2820 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2821 &dwarf2_per_objfile
->info
, 0, 0);
2823 if (dwz_elements
== 0)
2826 dwz
= dwarf2_get_dwz_file ();
2827 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2828 cu_list_elements
/ 2);
2831 /* Create the signatured type hash table from the index. */
2834 create_signatured_type_table_from_index (struct objfile
*objfile
,
2835 struct dwarf2_section_info
*section
,
2836 const gdb_byte
*bytes
,
2837 offset_type elements
)
2840 htab_t sig_types_hash
;
2842 dwarf2_per_objfile
->n_type_units
2843 = dwarf2_per_objfile
->n_allocated_type_units
2845 dwarf2_per_objfile
->all_type_units
2846 = xmalloc (dwarf2_per_objfile
->n_type_units
2847 * sizeof (struct signatured_type
*));
2849 sig_types_hash
= allocate_signatured_type_table (objfile
);
2851 for (i
= 0; i
< elements
; i
+= 3)
2853 struct signatured_type
*sig_type
;
2854 ULONGEST offset
, type_offset_in_tu
, signature
;
2857 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2858 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2859 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2861 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2864 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2865 struct signatured_type
);
2866 sig_type
->signature
= signature
;
2867 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2868 sig_type
->per_cu
.is_debug_types
= 1;
2869 sig_type
->per_cu
.section
= section
;
2870 sig_type
->per_cu
.offset
.sect_off
= offset
;
2871 sig_type
->per_cu
.objfile
= objfile
;
2872 sig_type
->per_cu
.v
.quick
2873 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2874 struct dwarf2_per_cu_quick_data
);
2876 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2879 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2882 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2885 /* Read the address map data from the mapped index, and use it to
2886 populate the objfile's psymtabs_addrmap. */
2889 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2891 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2892 const gdb_byte
*iter
, *end
;
2893 struct obstack temp_obstack
;
2894 struct addrmap
*mutable_map
;
2895 struct cleanup
*cleanup
;
2898 obstack_init (&temp_obstack
);
2899 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2900 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2902 iter
= index
->address_table
;
2903 end
= iter
+ index
->address_table_size
;
2905 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2909 ULONGEST hi
, lo
, cu_index
;
2910 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2912 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2914 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2919 complaint (&symfile_complaints
,
2920 _(".gdb_index address table has invalid range (%s - %s)"),
2921 hex_string (lo
), hex_string (hi
));
2925 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2927 complaint (&symfile_complaints
,
2928 _(".gdb_index address table has invalid CU number %u"),
2929 (unsigned) cu_index
);
2933 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2934 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2935 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2938 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2939 &objfile
->objfile_obstack
);
2940 do_cleanups (cleanup
);
2943 /* The hash function for strings in the mapped index. This is the same as
2944 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2945 implementation. This is necessary because the hash function is tied to the
2946 format of the mapped index file. The hash values do not have to match with
2949 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2952 mapped_index_string_hash (int index_version
, const void *p
)
2954 const unsigned char *str
= (const unsigned char *) p
;
2958 while ((c
= *str
++) != 0)
2960 if (index_version
>= 5)
2962 r
= r
* 67 + c
- 113;
2968 /* Find a slot in the mapped index INDEX for the object named NAME.
2969 If NAME is found, set *VEC_OUT to point to the CU vector in the
2970 constant pool and return 1. If NAME cannot be found, return 0. */
2973 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2974 offset_type
**vec_out
)
2976 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2978 offset_type slot
, step
;
2979 int (*cmp
) (const char *, const char *);
2981 if (current_language
->la_language
== language_cplus
2982 || current_language
->la_language
== language_java
2983 || current_language
->la_language
== language_fortran
2984 || current_language
->la_language
== language_d
)
2986 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2989 if (strchr (name
, '(') != NULL
)
2991 char *without_params
= cp_remove_params (name
);
2993 if (without_params
!= NULL
)
2995 make_cleanup (xfree
, without_params
);
2996 name
= without_params
;
3001 /* Index version 4 did not support case insensitive searches. But the
3002 indices for case insensitive languages are built in lowercase, therefore
3003 simulate our NAME being searched is also lowercased. */
3004 hash
= mapped_index_string_hash ((index
->version
== 4
3005 && case_sensitivity
== case_sensitive_off
3006 ? 5 : index
->version
),
3009 slot
= hash
& (index
->symbol_table_slots
- 1);
3010 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3011 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3015 /* Convert a slot number to an offset into the table. */
3016 offset_type i
= 2 * slot
;
3018 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3020 do_cleanups (back_to
);
3024 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3025 if (!cmp (name
, str
))
3027 *vec_out
= (offset_type
*) (index
->constant_pool
3028 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3029 do_cleanups (back_to
);
3033 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3037 /* A helper function that reads the .gdb_index from SECTION and fills
3038 in MAP. FILENAME is the name of the file containing the section;
3039 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3040 ok to use deprecated sections.
3042 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3043 out parameters that are filled in with information about the CU and
3044 TU lists in the section.
3046 Returns 1 if all went well, 0 otherwise. */
3049 read_index_from_section (struct objfile
*objfile
,
3050 const char *filename
,
3052 struct dwarf2_section_info
*section
,
3053 struct mapped_index
*map
,
3054 const gdb_byte
**cu_list
,
3055 offset_type
*cu_list_elements
,
3056 const gdb_byte
**types_list
,
3057 offset_type
*types_list_elements
)
3059 const gdb_byte
*addr
;
3060 offset_type version
;
3061 offset_type
*metadata
;
3064 if (dwarf2_section_empty_p (section
))
3067 /* Older elfutils strip versions could keep the section in the main
3068 executable while splitting it for the separate debug info file. */
3069 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3072 dwarf2_read_section (objfile
, section
);
3074 addr
= section
->buffer
;
3075 /* Version check. */
3076 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3077 /* Versions earlier than 3 emitted every copy of a psymbol. This
3078 causes the index to behave very poorly for certain requests. Version 3
3079 contained incomplete addrmap. So, it seems better to just ignore such
3083 static int warning_printed
= 0;
3084 if (!warning_printed
)
3086 warning (_("Skipping obsolete .gdb_index section in %s."),
3088 warning_printed
= 1;
3092 /* Index version 4 uses a different hash function than index version
3095 Versions earlier than 6 did not emit psymbols for inlined
3096 functions. Using these files will cause GDB not to be able to
3097 set breakpoints on inlined functions by name, so we ignore these
3098 indices unless the user has done
3099 "set use-deprecated-index-sections on". */
3100 if (version
< 6 && !deprecated_ok
)
3102 static int warning_printed
= 0;
3103 if (!warning_printed
)
3106 Skipping deprecated .gdb_index section in %s.\n\
3107 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3108 to use the section anyway."),
3110 warning_printed
= 1;
3114 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3115 of the TU (for symbols coming from TUs),
3116 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3117 Plus gold-generated indices can have duplicate entries for global symbols,
3118 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3119 These are just performance bugs, and we can't distinguish gdb-generated
3120 indices from gold-generated ones, so issue no warning here. */
3122 /* Indexes with higher version than the one supported by GDB may be no
3123 longer backward compatible. */
3127 map
->version
= version
;
3128 map
->total_size
= section
->size
;
3130 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3133 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3134 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3138 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3139 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3140 - MAYBE_SWAP (metadata
[i
]))
3144 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3145 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3146 - MAYBE_SWAP (metadata
[i
]));
3149 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3150 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3151 - MAYBE_SWAP (metadata
[i
]))
3152 / (2 * sizeof (offset_type
)));
3155 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3161 /* Read the index file. If everything went ok, initialize the "quick"
3162 elements of all the CUs and return 1. Otherwise, return 0. */
3165 dwarf2_read_index (struct objfile
*objfile
)
3167 struct mapped_index local_map
, *map
;
3168 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3169 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3170 struct dwz_file
*dwz
;
3172 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3173 use_deprecated_index_sections
,
3174 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3175 &cu_list
, &cu_list_elements
,
3176 &types_list
, &types_list_elements
))
3179 /* Don't use the index if it's empty. */
3180 if (local_map
.symbol_table_slots
== 0)
3183 /* If there is a .dwz file, read it so we can get its CU list as
3185 dwz
= dwarf2_get_dwz_file ();
3188 struct mapped_index dwz_map
;
3189 const gdb_byte
*dwz_types_ignore
;
3190 offset_type dwz_types_elements_ignore
;
3192 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3194 &dwz
->gdb_index
, &dwz_map
,
3195 &dwz_list
, &dwz_list_elements
,
3197 &dwz_types_elements_ignore
))
3199 warning (_("could not read '.gdb_index' section from %s; skipping"),
3200 bfd_get_filename (dwz
->dwz_bfd
));
3205 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3208 if (types_list_elements
)
3210 struct dwarf2_section_info
*section
;
3212 /* We can only handle a single .debug_types when we have an
3214 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3217 section
= VEC_index (dwarf2_section_info_def
,
3218 dwarf2_per_objfile
->types
, 0);
3220 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3221 types_list_elements
);
3224 create_addrmap_from_index (objfile
, &local_map
);
3226 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3229 dwarf2_per_objfile
->index_table
= map
;
3230 dwarf2_per_objfile
->using_index
= 1;
3231 dwarf2_per_objfile
->quick_file_names_table
=
3232 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3237 /* A helper for the "quick" functions which sets the global
3238 dwarf2_per_objfile according to OBJFILE. */
3241 dw2_setup (struct objfile
*objfile
)
3243 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3244 gdb_assert (dwarf2_per_objfile
);
3247 /* die_reader_func for dw2_get_file_names. */
3250 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3251 const gdb_byte
*info_ptr
,
3252 struct die_info
*comp_unit_die
,
3256 struct dwarf2_cu
*cu
= reader
->cu
;
3257 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3258 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3259 struct dwarf2_per_cu_data
*lh_cu
;
3260 struct line_header
*lh
;
3261 struct attribute
*attr
;
3263 const char *name
, *comp_dir
;
3265 struct quick_file_names
*qfn
;
3266 unsigned int line_offset
;
3268 gdb_assert (! this_cu
->is_debug_types
);
3270 /* Our callers never want to match partial units -- instead they
3271 will match the enclosing full CU. */
3272 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3274 this_cu
->v
.quick
->no_file_data
= 1;
3283 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3286 struct quick_file_names find_entry
;
3288 line_offset
= DW_UNSND (attr
);
3290 /* We may have already read in this line header (TU line header sharing).
3291 If we have we're done. */
3292 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3293 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3294 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3295 &find_entry
, INSERT
);
3298 lh_cu
->v
.quick
->file_names
= *slot
;
3302 lh
= dwarf_decode_line_header (line_offset
, cu
);
3306 lh_cu
->v
.quick
->no_file_data
= 1;
3310 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3311 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3312 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3313 gdb_assert (slot
!= NULL
);
3316 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3318 qfn
->num_file_names
= lh
->num_file_names
;
3319 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3320 lh
->num_file_names
* sizeof (char *));
3321 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3322 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3323 qfn
->real_names
= NULL
;
3325 free_line_header (lh
);
3327 lh_cu
->v
.quick
->file_names
= qfn
;
3330 /* A helper for the "quick" functions which attempts to read the line
3331 table for THIS_CU. */
3333 static struct quick_file_names
*
3334 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3336 /* This should never be called for TUs. */
3337 gdb_assert (! this_cu
->is_debug_types
);
3338 /* Nor type unit groups. */
3339 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3341 if (this_cu
->v
.quick
->file_names
!= NULL
)
3342 return this_cu
->v
.quick
->file_names
;
3343 /* If we know there is no line data, no point in looking again. */
3344 if (this_cu
->v
.quick
->no_file_data
)
3347 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3349 if (this_cu
->v
.quick
->no_file_data
)
3351 return this_cu
->v
.quick
->file_names
;
3354 /* A helper for the "quick" functions which computes and caches the
3355 real path for a given file name from the line table. */
3358 dw2_get_real_path (struct objfile
*objfile
,
3359 struct quick_file_names
*qfn
, int index
)
3361 if (qfn
->real_names
== NULL
)
3362 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3363 qfn
->num_file_names
, const char *);
3365 if (qfn
->real_names
[index
] == NULL
)
3366 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3368 return qfn
->real_names
[index
];
3371 static struct symtab
*
3372 dw2_find_last_source_symtab (struct objfile
*objfile
)
3374 struct compunit_symtab
*cust
;
3377 dw2_setup (objfile
);
3378 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3379 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3382 return compunit_primary_filetab (cust
);
3385 /* Traversal function for dw2_forget_cached_source_info. */
3388 dw2_free_cached_file_names (void **slot
, void *info
)
3390 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3392 if (file_data
->real_names
)
3396 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3398 xfree ((void*) file_data
->real_names
[i
]);
3399 file_data
->real_names
[i
] = NULL
;
3407 dw2_forget_cached_source_info (struct objfile
*objfile
)
3409 dw2_setup (objfile
);
3411 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3412 dw2_free_cached_file_names
, NULL
);
3415 /* Helper function for dw2_map_symtabs_matching_filename that expands
3416 the symtabs and calls the iterator. */
3419 dw2_map_expand_apply (struct objfile
*objfile
,
3420 struct dwarf2_per_cu_data
*per_cu
,
3421 const char *name
, const char *real_path
,
3422 int (*callback
) (struct symtab
*, void *),
3425 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3427 /* Don't visit already-expanded CUs. */
3428 if (per_cu
->v
.quick
->compunit_symtab
)
3431 /* This may expand more than one symtab, and we want to iterate over
3433 dw2_instantiate_symtab (per_cu
);
3435 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3436 objfile
->compunit_symtabs
, last_made
);
3439 /* Implementation of the map_symtabs_matching_filename method. */
3442 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3443 const char *real_path
,
3444 int (*callback
) (struct symtab
*, void *),
3448 const char *name_basename
= lbasename (name
);
3450 dw2_setup (objfile
);
3452 /* The rule is CUs specify all the files, including those used by
3453 any TU, so there's no need to scan TUs here. */
3455 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3458 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3459 struct quick_file_names
*file_data
;
3461 /* We only need to look at symtabs not already expanded. */
3462 if (per_cu
->v
.quick
->compunit_symtab
)
3465 file_data
= dw2_get_file_names (per_cu
);
3466 if (file_data
== NULL
)
3469 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3471 const char *this_name
= file_data
->file_names
[j
];
3472 const char *this_real_name
;
3474 if (compare_filenames_for_search (this_name
, name
))
3476 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3482 /* Before we invoke realpath, which can get expensive when many
3483 files are involved, do a quick comparison of the basenames. */
3484 if (! basenames_may_differ
3485 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3488 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3489 if (compare_filenames_for_search (this_real_name
, name
))
3491 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3497 if (real_path
!= NULL
)
3499 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3500 gdb_assert (IS_ABSOLUTE_PATH (name
));
3501 if (this_real_name
!= NULL
3502 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3504 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3516 /* Struct used to manage iterating over all CUs looking for a symbol. */
3518 struct dw2_symtab_iterator
3520 /* The internalized form of .gdb_index. */
3521 struct mapped_index
*index
;
3522 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3523 int want_specific_block
;
3524 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3525 Unused if !WANT_SPECIFIC_BLOCK. */
3527 /* The kind of symbol we're looking for. */
3529 /* The list of CUs from the index entry of the symbol,
3530 or NULL if not found. */
3532 /* The next element in VEC to look at. */
3534 /* The number of elements in VEC, or zero if there is no match. */
3536 /* Have we seen a global version of the symbol?
3537 If so we can ignore all further global instances.
3538 This is to work around gold/15646, inefficient gold-generated
3543 /* Initialize the index symtab iterator ITER.
3544 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3545 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3548 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3549 struct mapped_index
*index
,
3550 int want_specific_block
,
3555 iter
->index
= index
;
3556 iter
->want_specific_block
= want_specific_block
;
3557 iter
->block_index
= block_index
;
3558 iter
->domain
= domain
;
3560 iter
->global_seen
= 0;
3562 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3563 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3571 /* Return the next matching CU or NULL if there are no more. */
3573 static struct dwarf2_per_cu_data
*
3574 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3576 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3578 offset_type cu_index_and_attrs
=
3579 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3580 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3581 struct dwarf2_per_cu_data
*per_cu
;
3582 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3583 /* This value is only valid for index versions >= 7. */
3584 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3585 gdb_index_symbol_kind symbol_kind
=
3586 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3587 /* Only check the symbol attributes if they're present.
3588 Indices prior to version 7 don't record them,
3589 and indices >= 7 may elide them for certain symbols
3590 (gold does this). */
3592 (iter
->index
->version
>= 7
3593 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3595 /* Don't crash on bad data. */
3596 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3597 + dwarf2_per_objfile
->n_type_units
))
3599 complaint (&symfile_complaints
,
3600 _(".gdb_index entry has bad CU index"
3602 objfile_name (dwarf2_per_objfile
->objfile
));
3606 per_cu
= dw2_get_cutu (cu_index
);
3608 /* Skip if already read in. */
3609 if (per_cu
->v
.quick
->compunit_symtab
)
3612 /* Check static vs global. */
3615 if (iter
->want_specific_block
3616 && want_static
!= is_static
)
3618 /* Work around gold/15646. */
3619 if (!is_static
&& iter
->global_seen
)
3622 iter
->global_seen
= 1;
3625 /* Only check the symbol's kind if it has one. */
3628 switch (iter
->domain
)
3631 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3632 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3633 /* Some types are also in VAR_DOMAIN. */
3634 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3638 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3642 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3657 static struct compunit_symtab
*
3658 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3659 const char *name
, domain_enum domain
)
3661 struct compunit_symtab
*stab_best
= NULL
;
3662 struct mapped_index
*index
;
3664 dw2_setup (objfile
);
3666 index
= dwarf2_per_objfile
->index_table
;
3668 /* index is NULL if OBJF_READNOW. */
3671 struct dw2_symtab_iterator iter
;
3672 struct dwarf2_per_cu_data
*per_cu
;
3674 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3676 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3678 struct symbol
*sym
, *with_opaque
= NULL
;
3679 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3680 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3681 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3683 sym
= block_find_symbol (block
, name
, domain
,
3684 block_find_non_opaque_type_preferred
,
3687 /* Some caution must be observed with overloaded functions
3688 and methods, since the index will not contain any overload
3689 information (but NAME might contain it). */
3692 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3694 if (with_opaque
!= NULL
3695 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3698 /* Keep looking through other CUs. */
3706 dw2_print_stats (struct objfile
*objfile
)
3708 int i
, total
, count
;
3710 dw2_setup (objfile
);
3711 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3713 for (i
= 0; i
< total
; ++i
)
3715 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3717 if (!per_cu
->v
.quick
->compunit_symtab
)
3720 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3721 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3724 /* This dumps minimal information about the index.
3725 It is called via "mt print objfiles".
3726 One use is to verify .gdb_index has been loaded by the
3727 gdb.dwarf2/gdb-index.exp testcase. */
3730 dw2_dump (struct objfile
*objfile
)
3732 dw2_setup (objfile
);
3733 gdb_assert (dwarf2_per_objfile
->using_index
);
3734 printf_filtered (".gdb_index:");
3735 if (dwarf2_per_objfile
->index_table
!= NULL
)
3737 printf_filtered (" version %d\n",
3738 dwarf2_per_objfile
->index_table
->version
);
3741 printf_filtered (" faked for \"readnow\"\n");
3742 printf_filtered ("\n");
3746 dw2_relocate (struct objfile
*objfile
,
3747 const struct section_offsets
*new_offsets
,
3748 const struct section_offsets
*delta
)
3750 /* There's nothing to relocate here. */
3754 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3755 const char *func_name
)
3757 struct mapped_index
*index
;
3759 dw2_setup (objfile
);
3761 index
= dwarf2_per_objfile
->index_table
;
3763 /* index is NULL if OBJF_READNOW. */
3766 struct dw2_symtab_iterator iter
;
3767 struct dwarf2_per_cu_data
*per_cu
;
3769 /* Note: It doesn't matter what we pass for block_index here. */
3770 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3773 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3774 dw2_instantiate_symtab (per_cu
);
3779 dw2_expand_all_symtabs (struct objfile
*objfile
)
3783 dw2_setup (objfile
);
3785 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3786 + dwarf2_per_objfile
->n_type_units
); ++i
)
3788 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3790 dw2_instantiate_symtab (per_cu
);
3795 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3796 const char *fullname
)
3800 dw2_setup (objfile
);
3802 /* We don't need to consider type units here.
3803 This is only called for examining code, e.g. expand_line_sal.
3804 There can be an order of magnitude (or more) more type units
3805 than comp units, and we avoid them if we can. */
3807 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3810 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3811 struct quick_file_names
*file_data
;
3813 /* We only need to look at symtabs not already expanded. */
3814 if (per_cu
->v
.quick
->compunit_symtab
)
3817 file_data
= dw2_get_file_names (per_cu
);
3818 if (file_data
== NULL
)
3821 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3823 const char *this_fullname
= file_data
->file_names
[j
];
3825 if (filename_cmp (this_fullname
, fullname
) == 0)
3827 dw2_instantiate_symtab (per_cu
);
3835 dw2_map_matching_symbols (struct objfile
*objfile
,
3836 const char * name
, domain_enum domain
,
3838 int (*callback
) (struct block
*,
3839 struct symbol
*, void *),
3840 void *data
, symbol_compare_ftype
*match
,
3841 symbol_compare_ftype
*ordered_compare
)
3843 /* Currently unimplemented; used for Ada. The function can be called if the
3844 current language is Ada for a non-Ada objfile using GNU index. As Ada
3845 does not look for non-Ada symbols this function should just return. */
3849 dw2_expand_symtabs_matching
3850 (struct objfile
*objfile
,
3851 expand_symtabs_file_matcher_ftype
*file_matcher
,
3852 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3853 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3854 enum search_domain kind
,
3859 struct mapped_index
*index
;
3861 dw2_setup (objfile
);
3863 /* index_table is NULL if OBJF_READNOW. */
3864 if (!dwarf2_per_objfile
->index_table
)
3866 index
= dwarf2_per_objfile
->index_table
;
3868 if (file_matcher
!= NULL
)
3870 struct cleanup
*cleanup
;
3871 htab_t visited_found
, visited_not_found
;
3873 visited_found
= htab_create_alloc (10,
3874 htab_hash_pointer
, htab_eq_pointer
,
3875 NULL
, xcalloc
, xfree
);
3876 cleanup
= make_cleanup_htab_delete (visited_found
);
3877 visited_not_found
= htab_create_alloc (10,
3878 htab_hash_pointer
, htab_eq_pointer
,
3879 NULL
, xcalloc
, xfree
);
3880 make_cleanup_htab_delete (visited_not_found
);
3882 /* The rule is CUs specify all the files, including those used by
3883 any TU, so there's no need to scan TUs here. */
3885 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3888 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3889 struct quick_file_names
*file_data
;
3894 per_cu
->v
.quick
->mark
= 0;
3896 /* We only need to look at symtabs not already expanded. */
3897 if (per_cu
->v
.quick
->compunit_symtab
)
3900 file_data
= dw2_get_file_names (per_cu
);
3901 if (file_data
== NULL
)
3904 if (htab_find (visited_not_found
, file_data
) != NULL
)
3906 else if (htab_find (visited_found
, file_data
) != NULL
)
3908 per_cu
->v
.quick
->mark
= 1;
3912 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3914 const char *this_real_name
;
3916 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3918 per_cu
->v
.quick
->mark
= 1;
3922 /* Before we invoke realpath, which can get expensive when many
3923 files are involved, do a quick comparison of the basenames. */
3924 if (!basenames_may_differ
3925 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3929 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3930 if (file_matcher (this_real_name
, data
, 0))
3932 per_cu
->v
.quick
->mark
= 1;
3937 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3939 : visited_not_found
,
3944 do_cleanups (cleanup
);
3947 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3949 offset_type idx
= 2 * iter
;
3951 offset_type
*vec
, vec_len
, vec_idx
;
3952 int global_seen
= 0;
3956 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3959 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3961 if (! (*symbol_matcher
) (name
, data
))
3964 /* The name was matched, now expand corresponding CUs that were
3966 vec
= (offset_type
*) (index
->constant_pool
3967 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3968 vec_len
= MAYBE_SWAP (vec
[0]);
3969 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3971 struct dwarf2_per_cu_data
*per_cu
;
3972 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3973 /* This value is only valid for index versions >= 7. */
3974 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3975 gdb_index_symbol_kind symbol_kind
=
3976 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3977 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3978 /* Only check the symbol attributes if they're present.
3979 Indices prior to version 7 don't record them,
3980 and indices >= 7 may elide them for certain symbols
3981 (gold does this). */
3983 (index
->version
>= 7
3984 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3986 /* Work around gold/15646. */
3989 if (!is_static
&& global_seen
)
3995 /* Only check the symbol's kind if it has one. */
4000 case VARIABLES_DOMAIN
:
4001 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4004 case FUNCTIONS_DOMAIN
:
4005 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4009 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4017 /* Don't crash on bad data. */
4018 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4019 + dwarf2_per_objfile
->n_type_units
))
4021 complaint (&symfile_complaints
,
4022 _(".gdb_index entry has bad CU index"
4023 " [in module %s]"), objfile_name (objfile
));
4027 per_cu
= dw2_get_cutu (cu_index
);
4028 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4030 int symtab_was_null
=
4031 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4033 dw2_instantiate_symtab (per_cu
);
4035 if (expansion_notify
!= NULL
4037 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4039 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4047 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4050 static struct compunit_symtab
*
4051 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4056 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4057 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4060 if (cust
->includes
== NULL
)
4063 for (i
= 0; cust
->includes
[i
]; ++i
)
4065 struct compunit_symtab
*s
= cust
->includes
[i
];
4067 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4075 static struct compunit_symtab
*
4076 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4077 struct bound_minimal_symbol msymbol
,
4079 struct obj_section
*section
,
4082 struct dwarf2_per_cu_data
*data
;
4083 struct compunit_symtab
*result
;
4085 dw2_setup (objfile
);
4087 if (!objfile
->psymtabs_addrmap
)
4090 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4094 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4095 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4096 paddress (get_objfile_arch (objfile
), pc
));
4099 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4101 gdb_assert (result
!= NULL
);
4106 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4107 void *data
, int need_fullname
)
4110 struct cleanup
*cleanup
;
4111 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4112 NULL
, xcalloc
, xfree
);
4114 cleanup
= make_cleanup_htab_delete (visited
);
4115 dw2_setup (objfile
);
4117 /* The rule is CUs specify all the files, including those used by
4118 any TU, so there's no need to scan TUs here.
4119 We can ignore file names coming from already-expanded CUs. */
4121 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4123 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4125 if (per_cu
->v
.quick
->compunit_symtab
)
4127 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4130 *slot
= per_cu
->v
.quick
->file_names
;
4134 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4137 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4138 struct quick_file_names
*file_data
;
4141 /* We only need to look at symtabs not already expanded. */
4142 if (per_cu
->v
.quick
->compunit_symtab
)
4145 file_data
= dw2_get_file_names (per_cu
);
4146 if (file_data
== NULL
)
4149 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4152 /* Already visited. */
4157 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4159 const char *this_real_name
;
4162 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4164 this_real_name
= NULL
;
4165 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4169 do_cleanups (cleanup
);
4173 dw2_has_symbols (struct objfile
*objfile
)
4178 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4181 dw2_find_last_source_symtab
,
4182 dw2_forget_cached_source_info
,
4183 dw2_map_symtabs_matching_filename
,
4188 dw2_expand_symtabs_for_function
,
4189 dw2_expand_all_symtabs
,
4190 dw2_expand_symtabs_with_fullname
,
4191 dw2_map_matching_symbols
,
4192 dw2_expand_symtabs_matching
,
4193 dw2_find_pc_sect_compunit_symtab
,
4194 dw2_map_symbol_filenames
4197 /* Initialize for reading DWARF for this objfile. Return 0 if this
4198 file will use psymtabs, or 1 if using the GNU index. */
4201 dwarf2_initialize_objfile (struct objfile
*objfile
)
4203 /* If we're about to read full symbols, don't bother with the
4204 indices. In this case we also don't care if some other debug
4205 format is making psymtabs, because they are all about to be
4207 if ((objfile
->flags
& OBJF_READNOW
))
4211 dwarf2_per_objfile
->using_index
= 1;
4212 create_all_comp_units (objfile
);
4213 create_all_type_units (objfile
);
4214 dwarf2_per_objfile
->quick_file_names_table
=
4215 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4217 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4218 + dwarf2_per_objfile
->n_type_units
); ++i
)
4220 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4222 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4223 struct dwarf2_per_cu_quick_data
);
4226 /* Return 1 so that gdb sees the "quick" functions. However,
4227 these functions will be no-ops because we will have expanded
4232 if (dwarf2_read_index (objfile
))
4240 /* Build a partial symbol table. */
4243 dwarf2_build_psymtabs (struct objfile
*objfile
)
4246 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4248 init_psymbol_list (objfile
, 1024);
4253 /* This isn't really ideal: all the data we allocate on the
4254 objfile's obstack is still uselessly kept around. However,
4255 freeing it seems unsafe. */
4256 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4258 dwarf2_build_psymtabs_hard (objfile
);
4259 discard_cleanups (cleanups
);
4261 CATCH (except
, RETURN_MASK_ERROR
)
4263 exception_print (gdb_stderr
, except
);
4268 /* Return the total length of the CU described by HEADER. */
4271 get_cu_length (const struct comp_unit_head
*header
)
4273 return header
->initial_length_size
+ header
->length
;
4276 /* Return TRUE if OFFSET is within CU_HEADER. */
4279 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4281 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4282 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4284 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4287 /* Find the base address of the compilation unit for range lists and
4288 location lists. It will normally be specified by DW_AT_low_pc.
4289 In DWARF-3 draft 4, the base address could be overridden by
4290 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4291 compilation units with discontinuous ranges. */
4294 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4296 struct attribute
*attr
;
4299 cu
->base_address
= 0;
4301 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4304 cu
->base_address
= attr_value_as_address (attr
);
4309 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4312 cu
->base_address
= attr_value_as_address (attr
);
4318 /* Read in the comp unit header information from the debug_info at info_ptr.
4319 NOTE: This leaves members offset, first_die_offset to be filled in
4322 static const gdb_byte
*
4323 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4324 const gdb_byte
*info_ptr
, bfd
*abfd
)
4327 unsigned int bytes_read
;
4329 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4330 cu_header
->initial_length_size
= bytes_read
;
4331 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4332 info_ptr
+= bytes_read
;
4333 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4335 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4337 info_ptr
+= bytes_read
;
4338 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4340 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4341 if (signed_addr
< 0)
4342 internal_error (__FILE__
, __LINE__
,
4343 _("read_comp_unit_head: dwarf from non elf file"));
4344 cu_header
->signed_addr_p
= signed_addr
;
4349 /* Helper function that returns the proper abbrev section for
4352 static struct dwarf2_section_info
*
4353 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4355 struct dwarf2_section_info
*abbrev
;
4357 if (this_cu
->is_dwz
)
4358 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4360 abbrev
= &dwarf2_per_objfile
->abbrev
;
4365 /* Subroutine of read_and_check_comp_unit_head and
4366 read_and_check_type_unit_head to simplify them.
4367 Perform various error checking on the header. */
4370 error_check_comp_unit_head (struct comp_unit_head
*header
,
4371 struct dwarf2_section_info
*section
,
4372 struct dwarf2_section_info
*abbrev_section
)
4374 bfd
*abfd
= get_section_bfd_owner (section
);
4375 const char *filename
= get_section_file_name (section
);
4377 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4378 error (_("Dwarf Error: wrong version in compilation unit header "
4379 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4382 if (header
->abbrev_offset
.sect_off
4383 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4384 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4385 "(offset 0x%lx + 6) [in module %s]"),
4386 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4389 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4390 avoid potential 32-bit overflow. */
4391 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4393 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4394 "(offset 0x%lx + 0) [in module %s]"),
4395 (long) header
->length
, (long) header
->offset
.sect_off
,
4399 /* Read in a CU/TU header and perform some basic error checking.
4400 The contents of the header are stored in HEADER.
4401 The result is a pointer to the start of the first DIE. */
4403 static const gdb_byte
*
4404 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4405 struct dwarf2_section_info
*section
,
4406 struct dwarf2_section_info
*abbrev_section
,
4407 const gdb_byte
*info_ptr
,
4408 int is_debug_types_section
)
4410 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4411 bfd
*abfd
= get_section_bfd_owner (section
);
4413 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4415 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4417 /* If we're reading a type unit, skip over the signature and
4418 type_offset fields. */
4419 if (is_debug_types_section
)
4420 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4422 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4424 error_check_comp_unit_head (header
, section
, abbrev_section
);
4429 /* Read in the types comp unit header information from .debug_types entry at
4430 types_ptr. The result is a pointer to one past the end of the header. */
4432 static const gdb_byte
*
4433 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4434 struct dwarf2_section_info
*section
,
4435 struct dwarf2_section_info
*abbrev_section
,
4436 const gdb_byte
*info_ptr
,
4437 ULONGEST
*signature
,
4438 cu_offset
*type_offset_in_tu
)
4440 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4441 bfd
*abfd
= get_section_bfd_owner (section
);
4443 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4445 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4447 /* If we're reading a type unit, skip over the signature and
4448 type_offset fields. */
4449 if (signature
!= NULL
)
4450 *signature
= read_8_bytes (abfd
, info_ptr
);
4452 if (type_offset_in_tu
!= NULL
)
4453 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4454 header
->offset_size
);
4455 info_ptr
+= header
->offset_size
;
4457 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4459 error_check_comp_unit_head (header
, section
, abbrev_section
);
4464 /* Fetch the abbreviation table offset from a comp or type unit header. */
4467 read_abbrev_offset (struct dwarf2_section_info
*section
,
4470 bfd
*abfd
= get_section_bfd_owner (section
);
4471 const gdb_byte
*info_ptr
;
4472 unsigned int length
, initial_length_size
, offset_size
;
4473 sect_offset abbrev_offset
;
4475 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4476 info_ptr
= section
->buffer
+ offset
.sect_off
;
4477 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4478 offset_size
= initial_length_size
== 4 ? 4 : 8;
4479 info_ptr
+= initial_length_size
+ 2 /*version*/;
4480 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4481 return abbrev_offset
;
4484 /* Allocate a new partial symtab for file named NAME and mark this new
4485 partial symtab as being an include of PST. */
4488 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4489 struct objfile
*objfile
)
4491 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4493 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4495 /* It shares objfile->objfile_obstack. */
4496 subpst
->dirname
= pst
->dirname
;
4499 subpst
->textlow
= 0;
4500 subpst
->texthigh
= 0;
4502 subpst
->dependencies
= (struct partial_symtab
**)
4503 obstack_alloc (&objfile
->objfile_obstack
,
4504 sizeof (struct partial_symtab
*));
4505 subpst
->dependencies
[0] = pst
;
4506 subpst
->number_of_dependencies
= 1;
4508 subpst
->globals_offset
= 0;
4509 subpst
->n_global_syms
= 0;
4510 subpst
->statics_offset
= 0;
4511 subpst
->n_static_syms
= 0;
4512 subpst
->compunit_symtab
= NULL
;
4513 subpst
->read_symtab
= pst
->read_symtab
;
4516 /* No private part is necessary for include psymtabs. This property
4517 can be used to differentiate between such include psymtabs and
4518 the regular ones. */
4519 subpst
->read_symtab_private
= NULL
;
4522 /* Read the Line Number Program data and extract the list of files
4523 included by the source file represented by PST. Build an include
4524 partial symtab for each of these included files. */
4527 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4528 struct die_info
*die
,
4529 struct partial_symtab
*pst
)
4531 struct line_header
*lh
= NULL
;
4532 struct attribute
*attr
;
4534 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4536 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4538 return; /* No linetable, so no includes. */
4540 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4541 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4543 free_line_header (lh
);
4547 hash_signatured_type (const void *item
)
4549 const struct signatured_type
*sig_type
= item
;
4551 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4552 return sig_type
->signature
;
4556 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4558 const struct signatured_type
*lhs
= item_lhs
;
4559 const struct signatured_type
*rhs
= item_rhs
;
4561 return lhs
->signature
== rhs
->signature
;
4564 /* Allocate a hash table for signatured types. */
4567 allocate_signatured_type_table (struct objfile
*objfile
)
4569 return htab_create_alloc_ex (41,
4570 hash_signatured_type
,
4573 &objfile
->objfile_obstack
,
4574 hashtab_obstack_allocate
,
4575 dummy_obstack_deallocate
);
4578 /* A helper function to add a signatured type CU to a table. */
4581 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4583 struct signatured_type
*sigt
= *slot
;
4584 struct signatured_type
***datap
= datum
;
4592 /* Create the hash table of all entries in the .debug_types
4593 (or .debug_types.dwo) section(s).
4594 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4595 otherwise it is NULL.
4597 The result is a pointer to the hash table or NULL if there are no types.
4599 Note: This function processes DWO files only, not DWP files. */
4602 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4603 VEC (dwarf2_section_info_def
) *types
)
4605 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4606 htab_t types_htab
= NULL
;
4608 struct dwarf2_section_info
*section
;
4609 struct dwarf2_section_info
*abbrev_section
;
4611 if (VEC_empty (dwarf2_section_info_def
, types
))
4614 abbrev_section
= (dwo_file
!= NULL
4615 ? &dwo_file
->sections
.abbrev
4616 : &dwarf2_per_objfile
->abbrev
);
4618 if (dwarf_read_debug
)
4619 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4620 dwo_file
? ".dwo" : "",
4621 get_section_file_name (abbrev_section
));
4624 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4628 const gdb_byte
*info_ptr
, *end_ptr
;
4630 dwarf2_read_section (objfile
, section
);
4631 info_ptr
= section
->buffer
;
4633 if (info_ptr
== NULL
)
4636 /* We can't set abfd until now because the section may be empty or
4637 not present, in which case the bfd is unknown. */
4638 abfd
= get_section_bfd_owner (section
);
4640 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4641 because we don't need to read any dies: the signature is in the
4644 end_ptr
= info_ptr
+ section
->size
;
4645 while (info_ptr
< end_ptr
)
4648 cu_offset type_offset_in_tu
;
4650 struct signatured_type
*sig_type
;
4651 struct dwo_unit
*dwo_tu
;
4653 const gdb_byte
*ptr
= info_ptr
;
4654 struct comp_unit_head header
;
4655 unsigned int length
;
4657 offset
.sect_off
= ptr
- section
->buffer
;
4659 /* We need to read the type's signature in order to build the hash
4660 table, but we don't need anything else just yet. */
4662 ptr
= read_and_check_type_unit_head (&header
, section
,
4663 abbrev_section
, ptr
,
4664 &signature
, &type_offset_in_tu
);
4666 length
= get_cu_length (&header
);
4668 /* Skip dummy type units. */
4669 if (ptr
>= info_ptr
+ length
4670 || peek_abbrev_code (abfd
, ptr
) == 0)
4676 if (types_htab
== NULL
)
4679 types_htab
= allocate_dwo_unit_table (objfile
);
4681 types_htab
= allocate_signatured_type_table (objfile
);
4687 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4689 dwo_tu
->dwo_file
= dwo_file
;
4690 dwo_tu
->signature
= signature
;
4691 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4692 dwo_tu
->section
= section
;
4693 dwo_tu
->offset
= offset
;
4694 dwo_tu
->length
= length
;
4698 /* N.B.: type_offset is not usable if this type uses a DWO file.
4699 The real type_offset is in the DWO file. */
4701 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4702 struct signatured_type
);
4703 sig_type
->signature
= signature
;
4704 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4705 sig_type
->per_cu
.objfile
= objfile
;
4706 sig_type
->per_cu
.is_debug_types
= 1;
4707 sig_type
->per_cu
.section
= section
;
4708 sig_type
->per_cu
.offset
= offset
;
4709 sig_type
->per_cu
.length
= length
;
4712 slot
= htab_find_slot (types_htab
,
4713 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4715 gdb_assert (slot
!= NULL
);
4718 sect_offset dup_offset
;
4722 const struct dwo_unit
*dup_tu
= *slot
;
4724 dup_offset
= dup_tu
->offset
;
4728 const struct signatured_type
*dup_tu
= *slot
;
4730 dup_offset
= dup_tu
->per_cu
.offset
;
4733 complaint (&symfile_complaints
,
4734 _("debug type entry at offset 0x%x is duplicate to"
4735 " the entry at offset 0x%x, signature %s"),
4736 offset
.sect_off
, dup_offset
.sect_off
,
4737 hex_string (signature
));
4739 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4741 if (dwarf_read_debug
> 1)
4742 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4744 hex_string (signature
));
4753 /* Create the hash table of all entries in the .debug_types section,
4754 and initialize all_type_units.
4755 The result is zero if there is an error (e.g. missing .debug_types section),
4756 otherwise non-zero. */
4759 create_all_type_units (struct objfile
*objfile
)
4762 struct signatured_type
**iter
;
4764 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4765 if (types_htab
== NULL
)
4767 dwarf2_per_objfile
->signatured_types
= NULL
;
4771 dwarf2_per_objfile
->signatured_types
= types_htab
;
4773 dwarf2_per_objfile
->n_type_units
4774 = dwarf2_per_objfile
->n_allocated_type_units
4775 = htab_elements (types_htab
);
4776 dwarf2_per_objfile
->all_type_units
4777 = xmalloc (dwarf2_per_objfile
->n_type_units
4778 * sizeof (struct signatured_type
*));
4779 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4780 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4781 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4782 == dwarf2_per_objfile
->n_type_units
);
4787 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4788 If SLOT is non-NULL, it is the entry to use in the hash table.
4789 Otherwise we find one. */
4791 static struct signatured_type
*
4792 add_type_unit (ULONGEST sig
, void **slot
)
4794 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4795 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4796 struct signatured_type
*sig_type
;
4798 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4800 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4802 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4803 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4804 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4805 dwarf2_per_objfile
->all_type_units
4806 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4807 dwarf2_per_objfile
->n_allocated_type_units
4808 * sizeof (struct signatured_type
*));
4809 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4811 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4813 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4814 struct signatured_type
);
4815 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4816 sig_type
->signature
= sig
;
4817 sig_type
->per_cu
.is_debug_types
= 1;
4818 if (dwarf2_per_objfile
->using_index
)
4820 sig_type
->per_cu
.v
.quick
=
4821 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4822 struct dwarf2_per_cu_quick_data
);
4827 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4830 gdb_assert (*slot
== NULL
);
4832 /* The rest of sig_type must be filled in by the caller. */
4836 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4837 Fill in SIG_ENTRY with DWO_ENTRY. */
4840 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4841 struct signatured_type
*sig_entry
,
4842 struct dwo_unit
*dwo_entry
)
4844 /* Make sure we're not clobbering something we don't expect to. */
4845 gdb_assert (! sig_entry
->per_cu
.queued
);
4846 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4847 if (dwarf2_per_objfile
->using_index
)
4849 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4850 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4853 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4854 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4855 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4856 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4857 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4859 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4860 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4861 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4862 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4863 sig_entry
->per_cu
.objfile
= objfile
;
4864 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4865 sig_entry
->dwo_unit
= dwo_entry
;
4868 /* Subroutine of lookup_signatured_type.
4869 If we haven't read the TU yet, create the signatured_type data structure
4870 for a TU to be read in directly from a DWO file, bypassing the stub.
4871 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4872 using .gdb_index, then when reading a CU we want to stay in the DWO file
4873 containing that CU. Otherwise we could end up reading several other DWO
4874 files (due to comdat folding) to process the transitive closure of all the
4875 mentioned TUs, and that can be slow. The current DWO file will have every
4876 type signature that it needs.
4877 We only do this for .gdb_index because in the psymtab case we already have
4878 to read all the DWOs to build the type unit groups. */
4880 static struct signatured_type
*
4881 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4883 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4884 struct dwo_file
*dwo_file
;
4885 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4886 struct signatured_type find_sig_entry
, *sig_entry
;
4889 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4891 /* If TU skeletons have been removed then we may not have read in any
4893 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4895 dwarf2_per_objfile
->signatured_types
4896 = allocate_signatured_type_table (objfile
);
4899 /* We only ever need to read in one copy of a signatured type.
4900 Use the global signatured_types array to do our own comdat-folding
4901 of types. If this is the first time we're reading this TU, and
4902 the TU has an entry in .gdb_index, replace the recorded data from
4903 .gdb_index with this TU. */
4905 find_sig_entry
.signature
= sig
;
4906 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4907 &find_sig_entry
, INSERT
);
4910 /* We can get here with the TU already read, *or* in the process of being
4911 read. Don't reassign the global entry to point to this DWO if that's
4912 the case. Also note that if the TU is already being read, it may not
4913 have come from a DWO, the program may be a mix of Fission-compiled
4914 code and non-Fission-compiled code. */
4916 /* Have we already tried to read this TU?
4917 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4918 needn't exist in the global table yet). */
4919 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4922 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4923 dwo_unit of the TU itself. */
4924 dwo_file
= cu
->dwo_unit
->dwo_file
;
4926 /* Ok, this is the first time we're reading this TU. */
4927 if (dwo_file
->tus
== NULL
)
4929 find_dwo_entry
.signature
= sig
;
4930 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4931 if (dwo_entry
== NULL
)
4934 /* If the global table doesn't have an entry for this TU, add one. */
4935 if (sig_entry
== NULL
)
4936 sig_entry
= add_type_unit (sig
, slot
);
4938 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4939 sig_entry
->per_cu
.tu_read
= 1;
4943 /* Subroutine of lookup_signatured_type.
4944 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4945 then try the DWP file. If the TU stub (skeleton) has been removed then
4946 it won't be in .gdb_index. */
4948 static struct signatured_type
*
4949 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4951 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4952 struct dwp_file
*dwp_file
= get_dwp_file ();
4953 struct dwo_unit
*dwo_entry
;
4954 struct signatured_type find_sig_entry
, *sig_entry
;
4957 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4958 gdb_assert (dwp_file
!= NULL
);
4960 /* If TU skeletons have been removed then we may not have read in any
4962 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4964 dwarf2_per_objfile
->signatured_types
4965 = allocate_signatured_type_table (objfile
);
4968 find_sig_entry
.signature
= sig
;
4969 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4970 &find_sig_entry
, INSERT
);
4973 /* Have we already tried to read this TU?
4974 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4975 needn't exist in the global table yet). */
4976 if (sig_entry
!= NULL
)
4979 if (dwp_file
->tus
== NULL
)
4981 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4982 sig
, 1 /* is_debug_types */);
4983 if (dwo_entry
== NULL
)
4986 sig_entry
= add_type_unit (sig
, slot
);
4987 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4992 /* Lookup a signature based type for DW_FORM_ref_sig8.
4993 Returns NULL if signature SIG is not present in the table.
4994 It is up to the caller to complain about this. */
4996 static struct signatured_type
*
4997 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5000 && dwarf2_per_objfile
->using_index
)
5002 /* We're in a DWO/DWP file, and we're using .gdb_index.
5003 These cases require special processing. */
5004 if (get_dwp_file () == NULL
)
5005 return lookup_dwo_signatured_type (cu
, sig
);
5007 return lookup_dwp_signatured_type (cu
, sig
);
5011 struct signatured_type find_entry
, *entry
;
5013 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5015 find_entry
.signature
= sig
;
5016 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
5021 /* Low level DIE reading support. */
5023 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5026 init_cu_die_reader (struct die_reader_specs
*reader
,
5027 struct dwarf2_cu
*cu
,
5028 struct dwarf2_section_info
*section
,
5029 struct dwo_file
*dwo_file
)
5031 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5032 reader
->abfd
= get_section_bfd_owner (section
);
5034 reader
->dwo_file
= dwo_file
;
5035 reader
->die_section
= section
;
5036 reader
->buffer
= section
->buffer
;
5037 reader
->buffer_end
= section
->buffer
+ section
->size
;
5038 reader
->comp_dir
= NULL
;
5041 /* Subroutine of init_cutu_and_read_dies to simplify it.
5042 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5043 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5046 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5047 from it to the DIE in the DWO. If NULL we are skipping the stub.
5048 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5049 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5050 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5051 STUB_COMP_DIR may be non-NULL.
5052 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5053 are filled in with the info of the DIE from the DWO file.
5054 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5055 provided an abbrev table to use.
5056 The result is non-zero if a valid (non-dummy) DIE was found. */
5059 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5060 struct dwo_unit
*dwo_unit
,
5061 int abbrev_table_provided
,
5062 struct die_info
*stub_comp_unit_die
,
5063 const char *stub_comp_dir
,
5064 struct die_reader_specs
*result_reader
,
5065 const gdb_byte
**result_info_ptr
,
5066 struct die_info
**result_comp_unit_die
,
5067 int *result_has_children
)
5069 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5070 struct dwarf2_cu
*cu
= this_cu
->cu
;
5071 struct dwarf2_section_info
*section
;
5073 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5074 ULONGEST signature
; /* Or dwo_id. */
5075 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5076 int i
,num_extra_attrs
;
5077 struct dwarf2_section_info
*dwo_abbrev_section
;
5078 struct attribute
*attr
;
5079 struct die_info
*comp_unit_die
;
5081 /* At most one of these may be provided. */
5082 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5084 /* These attributes aren't processed until later:
5085 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5086 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5087 referenced later. However, these attributes are found in the stub
5088 which we won't have later. In order to not impose this complication
5089 on the rest of the code, we read them here and copy them to the
5098 if (stub_comp_unit_die
!= NULL
)
5100 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5102 if (! this_cu
->is_debug_types
)
5103 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5104 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5105 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5106 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5107 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5109 /* There should be a DW_AT_addr_base attribute here (if needed).
5110 We need the value before we can process DW_FORM_GNU_addr_index. */
5112 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5114 cu
->addr_base
= DW_UNSND (attr
);
5116 /* There should be a DW_AT_ranges_base attribute here (if needed).
5117 We need the value before we can process DW_AT_ranges. */
5118 cu
->ranges_base
= 0;
5119 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5121 cu
->ranges_base
= DW_UNSND (attr
);
5123 else if (stub_comp_dir
!= NULL
)
5125 /* Reconstruct the comp_dir attribute to simplify the code below. */
5126 comp_dir
= (struct attribute
*)
5127 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5128 comp_dir
->name
= DW_AT_comp_dir
;
5129 comp_dir
->form
= DW_FORM_string
;
5130 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5131 DW_STRING (comp_dir
) = stub_comp_dir
;
5134 /* Set up for reading the DWO CU/TU. */
5135 cu
->dwo_unit
= dwo_unit
;
5136 section
= dwo_unit
->section
;
5137 dwarf2_read_section (objfile
, section
);
5138 abfd
= get_section_bfd_owner (section
);
5139 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5140 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5141 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5143 if (this_cu
->is_debug_types
)
5145 ULONGEST header_signature
;
5146 cu_offset type_offset_in_tu
;
5147 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5149 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5153 &type_offset_in_tu
);
5154 /* This is not an assert because it can be caused by bad debug info. */
5155 if (sig_type
->signature
!= header_signature
)
5157 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5158 " TU at offset 0x%x [in module %s]"),
5159 hex_string (sig_type
->signature
),
5160 hex_string (header_signature
),
5161 dwo_unit
->offset
.sect_off
,
5162 bfd_get_filename (abfd
));
5164 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5165 /* For DWOs coming from DWP files, we don't know the CU length
5166 nor the type's offset in the TU until now. */
5167 dwo_unit
->length
= get_cu_length (&cu
->header
);
5168 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5170 /* Establish the type offset that can be used to lookup the type.
5171 For DWO files, we don't know it until now. */
5172 sig_type
->type_offset_in_section
.sect_off
=
5173 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5177 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5180 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5181 /* For DWOs coming from DWP files, we don't know the CU length
5183 dwo_unit
->length
= get_cu_length (&cu
->header
);
5186 /* Replace the CU's original abbrev table with the DWO's.
5187 Reminder: We can't read the abbrev table until we've read the header. */
5188 if (abbrev_table_provided
)
5190 /* Don't free the provided abbrev table, the caller of
5191 init_cutu_and_read_dies owns it. */
5192 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5193 /* Ensure the DWO abbrev table gets freed. */
5194 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5198 dwarf2_free_abbrev_table (cu
);
5199 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5200 /* Leave any existing abbrev table cleanup as is. */
5203 /* Read in the die, but leave space to copy over the attributes
5204 from the stub. This has the benefit of simplifying the rest of
5205 the code - all the work to maintain the illusion of a single
5206 DW_TAG_{compile,type}_unit DIE is done here. */
5207 num_extra_attrs
= ((stmt_list
!= NULL
)
5211 + (comp_dir
!= NULL
));
5212 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5213 result_has_children
, num_extra_attrs
);
5215 /* Copy over the attributes from the stub to the DIE we just read in. */
5216 comp_unit_die
= *result_comp_unit_die
;
5217 i
= comp_unit_die
->num_attrs
;
5218 if (stmt_list
!= NULL
)
5219 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5221 comp_unit_die
->attrs
[i
++] = *low_pc
;
5222 if (high_pc
!= NULL
)
5223 comp_unit_die
->attrs
[i
++] = *high_pc
;
5225 comp_unit_die
->attrs
[i
++] = *ranges
;
5226 if (comp_dir
!= NULL
)
5227 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5228 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5230 if (dwarf_die_debug
)
5232 fprintf_unfiltered (gdb_stdlog
,
5233 "Read die from %s@0x%x of %s:\n",
5234 get_section_name (section
),
5235 (unsigned) (begin_info_ptr
- section
->buffer
),
5236 bfd_get_filename (abfd
));
5237 dump_die (comp_unit_die
, dwarf_die_debug
);
5240 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5241 TUs by skipping the stub and going directly to the entry in the DWO file.
5242 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5243 to get it via circuitous means. Blech. */
5244 if (comp_dir
!= NULL
)
5245 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5247 /* Skip dummy compilation units. */
5248 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5249 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5252 *result_info_ptr
= info_ptr
;
5256 /* Subroutine of init_cutu_and_read_dies to simplify it.
5257 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5258 Returns NULL if the specified DWO unit cannot be found. */
5260 static struct dwo_unit
*
5261 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5262 struct die_info
*comp_unit_die
)
5264 struct dwarf2_cu
*cu
= this_cu
->cu
;
5265 struct attribute
*attr
;
5267 struct dwo_unit
*dwo_unit
;
5268 const char *comp_dir
, *dwo_name
;
5270 gdb_assert (cu
!= NULL
);
5272 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5273 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5274 gdb_assert (attr
!= NULL
);
5275 dwo_name
= DW_STRING (attr
);
5277 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5279 comp_dir
= DW_STRING (attr
);
5281 if (this_cu
->is_debug_types
)
5283 struct signatured_type
*sig_type
;
5285 /* Since this_cu is the first member of struct signatured_type,
5286 we can go from a pointer to one to a pointer to the other. */
5287 sig_type
= (struct signatured_type
*) this_cu
;
5288 signature
= sig_type
->signature
;
5289 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5293 struct attribute
*attr
;
5295 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5297 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5299 dwo_name
, objfile_name (this_cu
->objfile
));
5300 signature
= DW_UNSND (attr
);
5301 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5308 /* Subroutine of init_cutu_and_read_dies to simplify it.
5309 See it for a description of the parameters.
5310 Read a TU directly from a DWO file, bypassing the stub.
5312 Note: This function could be a little bit simpler if we shared cleanups
5313 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5314 to do, so we keep this function self-contained. Or we could move this
5315 into our caller, but it's complex enough already. */
5318 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5319 int use_existing_cu
, int keep
,
5320 die_reader_func_ftype
*die_reader_func
,
5323 struct dwarf2_cu
*cu
;
5324 struct signatured_type
*sig_type
;
5325 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5326 struct die_reader_specs reader
;
5327 const gdb_byte
*info_ptr
;
5328 struct die_info
*comp_unit_die
;
5331 /* Verify we can do the following downcast, and that we have the
5333 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5334 sig_type
= (struct signatured_type
*) this_cu
;
5335 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5337 cleanups
= make_cleanup (null_cleanup
, NULL
);
5339 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5341 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5343 /* There's no need to do the rereading_dwo_cu handling that
5344 init_cutu_and_read_dies does since we don't read the stub. */
5348 /* If !use_existing_cu, this_cu->cu must be NULL. */
5349 gdb_assert (this_cu
->cu
== NULL
);
5350 cu
= xmalloc (sizeof (*cu
));
5351 init_one_comp_unit (cu
, this_cu
);
5352 /* If an error occurs while loading, release our storage. */
5353 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5356 /* A future optimization, if needed, would be to use an existing
5357 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5358 could share abbrev tables. */
5360 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5361 0 /* abbrev_table_provided */,
5362 NULL
/* stub_comp_unit_die */,
5363 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5365 &comp_unit_die
, &has_children
) == 0)
5368 do_cleanups (cleanups
);
5372 /* All the "real" work is done here. */
5373 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5375 /* This duplicates the code in init_cutu_and_read_dies,
5376 but the alternative is making the latter more complex.
5377 This function is only for the special case of using DWO files directly:
5378 no point in overly complicating the general case just to handle this. */
5379 if (free_cu_cleanup
!= NULL
)
5383 /* We've successfully allocated this compilation unit. Let our
5384 caller clean it up when finished with it. */
5385 discard_cleanups (free_cu_cleanup
);
5387 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5388 So we have to manually free the abbrev table. */
5389 dwarf2_free_abbrev_table (cu
);
5391 /* Link this CU into read_in_chain. */
5392 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5393 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5396 do_cleanups (free_cu_cleanup
);
5399 do_cleanups (cleanups
);
5402 /* Initialize a CU (or TU) and read its DIEs.
5403 If the CU defers to a DWO file, read the DWO file as well.
5405 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5406 Otherwise the table specified in the comp unit header is read in and used.
5407 This is an optimization for when we already have the abbrev table.
5409 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5410 Otherwise, a new CU is allocated with xmalloc.
5412 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5413 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5415 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5416 linker) then DIE_READER_FUNC will not get called. */
5419 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5420 struct abbrev_table
*abbrev_table
,
5421 int use_existing_cu
, int keep
,
5422 die_reader_func_ftype
*die_reader_func
,
5425 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5426 struct dwarf2_section_info
*section
= this_cu
->section
;
5427 bfd
*abfd
= get_section_bfd_owner (section
);
5428 struct dwarf2_cu
*cu
;
5429 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5430 struct die_reader_specs reader
;
5431 struct die_info
*comp_unit_die
;
5433 struct attribute
*attr
;
5434 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5435 struct signatured_type
*sig_type
= NULL
;
5436 struct dwarf2_section_info
*abbrev_section
;
5437 /* Non-zero if CU currently points to a DWO file and we need to
5438 reread it. When this happens we need to reread the skeleton die
5439 before we can reread the DWO file (this only applies to CUs, not TUs). */
5440 int rereading_dwo_cu
= 0;
5442 if (dwarf_die_debug
)
5443 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5444 this_cu
->is_debug_types
? "type" : "comp",
5445 this_cu
->offset
.sect_off
);
5447 if (use_existing_cu
)
5450 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5451 file (instead of going through the stub), short-circuit all of this. */
5452 if (this_cu
->reading_dwo_directly
)
5454 /* Narrow down the scope of possibilities to have to understand. */
5455 gdb_assert (this_cu
->is_debug_types
);
5456 gdb_assert (abbrev_table
== NULL
);
5457 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5458 die_reader_func
, data
);
5462 cleanups
= make_cleanup (null_cleanup
, NULL
);
5464 /* This is cheap if the section is already read in. */
5465 dwarf2_read_section (objfile
, section
);
5467 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5469 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5471 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5474 /* If this CU is from a DWO file we need to start over, we need to
5475 refetch the attributes from the skeleton CU.
5476 This could be optimized by retrieving those attributes from when we
5477 were here the first time: the previous comp_unit_die was stored in
5478 comp_unit_obstack. But there's no data yet that we need this
5480 if (cu
->dwo_unit
!= NULL
)
5481 rereading_dwo_cu
= 1;
5485 /* If !use_existing_cu, this_cu->cu must be NULL. */
5486 gdb_assert (this_cu
->cu
== NULL
);
5487 cu
= xmalloc (sizeof (*cu
));
5488 init_one_comp_unit (cu
, this_cu
);
5489 /* If an error occurs while loading, release our storage. */
5490 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5493 /* Get the header. */
5494 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5496 /* We already have the header, there's no need to read it in again. */
5497 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5501 if (this_cu
->is_debug_types
)
5504 cu_offset type_offset_in_tu
;
5506 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5507 abbrev_section
, info_ptr
,
5509 &type_offset_in_tu
);
5511 /* Since per_cu is the first member of struct signatured_type,
5512 we can go from a pointer to one to a pointer to the other. */
5513 sig_type
= (struct signatured_type
*) this_cu
;
5514 gdb_assert (sig_type
->signature
== signature
);
5515 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5516 == type_offset_in_tu
.cu_off
);
5517 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5519 /* LENGTH has not been set yet for type units if we're
5520 using .gdb_index. */
5521 this_cu
->length
= get_cu_length (&cu
->header
);
5523 /* Establish the type offset that can be used to lookup the type. */
5524 sig_type
->type_offset_in_section
.sect_off
=
5525 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5529 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5533 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5534 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5538 /* Skip dummy compilation units. */
5539 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5540 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5542 do_cleanups (cleanups
);
5546 /* If we don't have them yet, read the abbrevs for this compilation unit.
5547 And if we need to read them now, make sure they're freed when we're
5548 done. Note that it's important that if the CU had an abbrev table
5549 on entry we don't free it when we're done: Somewhere up the call stack
5550 it may be in use. */
5551 if (abbrev_table
!= NULL
)
5553 gdb_assert (cu
->abbrev_table
== NULL
);
5554 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5555 == abbrev_table
->offset
.sect_off
);
5556 cu
->abbrev_table
= abbrev_table
;
5558 else if (cu
->abbrev_table
== NULL
)
5560 dwarf2_read_abbrevs (cu
, abbrev_section
);
5561 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5563 else if (rereading_dwo_cu
)
5565 dwarf2_free_abbrev_table (cu
);
5566 dwarf2_read_abbrevs (cu
, abbrev_section
);
5569 /* Read the top level CU/TU die. */
5570 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5571 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5573 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5575 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5576 DWO CU, that this test will fail (the attribute will not be present). */
5577 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5580 struct dwo_unit
*dwo_unit
;
5581 struct die_info
*dwo_comp_unit_die
;
5585 complaint (&symfile_complaints
,
5586 _("compilation unit with DW_AT_GNU_dwo_name"
5587 " has children (offset 0x%x) [in module %s]"),
5588 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5590 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5591 if (dwo_unit
!= NULL
)
5593 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5594 abbrev_table
!= NULL
,
5595 comp_unit_die
, NULL
,
5597 &dwo_comp_unit_die
, &has_children
) == 0)
5600 do_cleanups (cleanups
);
5603 comp_unit_die
= dwo_comp_unit_die
;
5607 /* Yikes, we couldn't find the rest of the DIE, we only have
5608 the stub. A complaint has already been logged. There's
5609 not much more we can do except pass on the stub DIE to
5610 die_reader_func. We don't want to throw an error on bad
5615 /* All of the above is setup for this call. Yikes. */
5616 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5618 /* Done, clean up. */
5619 if (free_cu_cleanup
!= NULL
)
5623 /* We've successfully allocated this compilation unit. Let our
5624 caller clean it up when finished with it. */
5625 discard_cleanups (free_cu_cleanup
);
5627 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5628 So we have to manually free the abbrev table. */
5629 dwarf2_free_abbrev_table (cu
);
5631 /* Link this CU into read_in_chain. */
5632 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5633 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5636 do_cleanups (free_cu_cleanup
);
5639 do_cleanups (cleanups
);
5642 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5643 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5644 to have already done the lookup to find the DWO file).
5646 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5647 THIS_CU->is_debug_types, but nothing else.
5649 We fill in THIS_CU->length.
5651 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5652 linker) then DIE_READER_FUNC will not get called.
5654 THIS_CU->cu is always freed when done.
5655 This is done in order to not leave THIS_CU->cu in a state where we have
5656 to care whether it refers to the "main" CU or the DWO CU. */
5659 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5660 struct dwo_file
*dwo_file
,
5661 die_reader_func_ftype
*die_reader_func
,
5664 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5665 struct dwarf2_section_info
*section
= this_cu
->section
;
5666 bfd
*abfd
= get_section_bfd_owner (section
);
5667 struct dwarf2_section_info
*abbrev_section
;
5668 struct dwarf2_cu cu
;
5669 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5670 struct die_reader_specs reader
;
5671 struct cleanup
*cleanups
;
5672 struct die_info
*comp_unit_die
;
5675 if (dwarf_die_debug
)
5676 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5677 this_cu
->is_debug_types
? "type" : "comp",
5678 this_cu
->offset
.sect_off
);
5680 gdb_assert (this_cu
->cu
== NULL
);
5682 abbrev_section
= (dwo_file
!= NULL
5683 ? &dwo_file
->sections
.abbrev
5684 : get_abbrev_section_for_cu (this_cu
));
5686 /* This is cheap if the section is already read in. */
5687 dwarf2_read_section (objfile
, section
);
5689 init_one_comp_unit (&cu
, this_cu
);
5691 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5693 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5694 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5695 abbrev_section
, info_ptr
,
5696 this_cu
->is_debug_types
);
5698 this_cu
->length
= get_cu_length (&cu
.header
);
5700 /* Skip dummy compilation units. */
5701 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5702 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5704 do_cleanups (cleanups
);
5708 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5709 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5711 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5712 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5714 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5716 do_cleanups (cleanups
);
5719 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5720 does not lookup the specified DWO file.
5721 This cannot be used to read DWO files.
5723 THIS_CU->cu is always freed when done.
5724 This is done in order to not leave THIS_CU->cu in a state where we have
5725 to care whether it refers to the "main" CU or the DWO CU.
5726 We can revisit this if the data shows there's a performance issue. */
5729 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5730 die_reader_func_ftype
*die_reader_func
,
5733 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5736 /* Type Unit Groups.
5738 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5739 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5740 so that all types coming from the same compilation (.o file) are grouped
5741 together. A future step could be to put the types in the same symtab as
5742 the CU the types ultimately came from. */
5745 hash_type_unit_group (const void *item
)
5747 const struct type_unit_group
*tu_group
= item
;
5749 return hash_stmt_list_entry (&tu_group
->hash
);
5753 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5755 const struct type_unit_group
*lhs
= item_lhs
;
5756 const struct type_unit_group
*rhs
= item_rhs
;
5758 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5761 /* Allocate a hash table for type unit groups. */
5764 allocate_type_unit_groups_table (void)
5766 return htab_create_alloc_ex (3,
5767 hash_type_unit_group
,
5770 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5771 hashtab_obstack_allocate
,
5772 dummy_obstack_deallocate
);
5775 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5776 partial symtabs. We combine several TUs per psymtab to not let the size
5777 of any one psymtab grow too big. */
5778 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5779 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5781 /* Helper routine for get_type_unit_group.
5782 Create the type_unit_group object used to hold one or more TUs. */
5784 static struct type_unit_group
*
5785 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5787 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5788 struct dwarf2_per_cu_data
*per_cu
;
5789 struct type_unit_group
*tu_group
;
5791 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5792 struct type_unit_group
);
5793 per_cu
= &tu_group
->per_cu
;
5794 per_cu
->objfile
= objfile
;
5796 if (dwarf2_per_objfile
->using_index
)
5798 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5799 struct dwarf2_per_cu_quick_data
);
5803 unsigned int line_offset
= line_offset_struct
.sect_off
;
5804 struct partial_symtab
*pst
;
5807 /* Give the symtab a useful name for debug purposes. */
5808 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5809 name
= xstrprintf ("<type_units_%d>",
5810 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5812 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5814 pst
= create_partial_symtab (per_cu
, name
);
5820 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5821 tu_group
->hash
.line_offset
= line_offset_struct
;
5826 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5827 STMT_LIST is a DW_AT_stmt_list attribute. */
5829 static struct type_unit_group
*
5830 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5832 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5833 struct type_unit_group
*tu_group
;
5835 unsigned int line_offset
;
5836 struct type_unit_group type_unit_group_for_lookup
;
5838 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5840 dwarf2_per_objfile
->type_unit_groups
=
5841 allocate_type_unit_groups_table ();
5844 /* Do we need to create a new group, or can we use an existing one? */
5848 line_offset
= DW_UNSND (stmt_list
);
5849 ++tu_stats
->nr_symtab_sharers
;
5853 /* Ugh, no stmt_list. Rare, but we have to handle it.
5854 We can do various things here like create one group per TU or
5855 spread them over multiple groups to split up the expansion work.
5856 To avoid worst case scenarios (too many groups or too large groups)
5857 we, umm, group them in bunches. */
5858 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5859 | (tu_stats
->nr_stmt_less_type_units
5860 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5861 ++tu_stats
->nr_stmt_less_type_units
;
5864 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5865 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5866 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5867 &type_unit_group_for_lookup
, INSERT
);
5871 gdb_assert (tu_group
!= NULL
);
5875 sect_offset line_offset_struct
;
5877 line_offset_struct
.sect_off
= line_offset
;
5878 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5880 ++tu_stats
->nr_symtabs
;
5886 /* Partial symbol tables. */
5888 /* Create a psymtab named NAME and assign it to PER_CU.
5890 The caller must fill in the following details:
5891 dirname, textlow, texthigh. */
5893 static struct partial_symtab
*
5894 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5896 struct objfile
*objfile
= per_cu
->objfile
;
5897 struct partial_symtab
*pst
;
5899 pst
= start_psymtab_common (objfile
, name
, 0,
5900 objfile
->global_psymbols
.next
,
5901 objfile
->static_psymbols
.next
);
5903 pst
->psymtabs_addrmap_supported
= 1;
5905 /* This is the glue that links PST into GDB's symbol API. */
5906 pst
->read_symtab_private
= per_cu
;
5907 pst
->read_symtab
= dwarf2_read_symtab
;
5908 per_cu
->v
.psymtab
= pst
;
5913 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5916 struct process_psymtab_comp_unit_data
5918 /* True if we are reading a DW_TAG_partial_unit. */
5920 int want_partial_unit
;
5922 /* The "pretend" language that is used if the CU doesn't declare a
5925 enum language pretend_language
;
5928 /* die_reader_func for process_psymtab_comp_unit. */
5931 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5932 const gdb_byte
*info_ptr
,
5933 struct die_info
*comp_unit_die
,
5937 struct dwarf2_cu
*cu
= reader
->cu
;
5938 struct objfile
*objfile
= cu
->objfile
;
5939 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5940 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5941 struct attribute
*attr
;
5943 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5944 struct partial_symtab
*pst
;
5946 const char *filename
;
5947 struct process_psymtab_comp_unit_data
*info
= data
;
5949 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5952 gdb_assert (! per_cu
->is_debug_types
);
5954 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5956 cu
->list_in_scope
= &file_symbols
;
5958 /* Allocate a new partial symbol table structure. */
5959 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5960 if (attr
== NULL
|| !DW_STRING (attr
))
5963 filename
= DW_STRING (attr
);
5965 pst
= create_partial_symtab (per_cu
, filename
);
5967 /* This must be done before calling dwarf2_build_include_psymtabs. */
5968 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5970 pst
->dirname
= DW_STRING (attr
);
5972 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5974 dwarf2_find_base_address (comp_unit_die
, cu
);
5976 /* Possibly set the default values of LOWPC and HIGHPC from
5978 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5979 &best_highpc
, cu
, pst
);
5980 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5981 /* Store the contiguous range if it is not empty; it can be empty for
5982 CUs with no code. */
5983 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5984 gdbarch_adjust_dwarf2_addr (gdbarch
,
5985 best_lowpc
+ baseaddr
),
5986 gdbarch_adjust_dwarf2_addr (gdbarch
,
5987 best_highpc
+ baseaddr
) - 1,
5990 /* Check if comp unit has_children.
5991 If so, read the rest of the partial symbols from this comp unit.
5992 If not, there's no more debug_info for this comp unit. */
5995 struct partial_die_info
*first_die
;
5996 CORE_ADDR lowpc
, highpc
;
5998 lowpc
= ((CORE_ADDR
) -1);
5999 highpc
= ((CORE_ADDR
) 0);
6001 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6003 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6006 /* If we didn't find a lowpc, set it to highpc to avoid
6007 complaints from `maint check'. */
6008 if (lowpc
== ((CORE_ADDR
) -1))
6011 /* If the compilation unit didn't have an explicit address range,
6012 then use the information extracted from its child dies. */
6016 best_highpc
= highpc
;
6019 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6020 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6022 end_psymtab_common (objfile
, pst
);
6024 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6027 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6028 struct dwarf2_per_cu_data
*iter
;
6030 /* Fill in 'dependencies' here; we fill in 'users' in a
6032 pst
->number_of_dependencies
= len
;
6033 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6034 len
* sizeof (struct symtab
*));
6036 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6039 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6041 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6044 /* Get the list of files included in the current compilation unit,
6045 and build a psymtab for each of them. */
6046 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6048 if (dwarf_read_debug
)
6050 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6052 fprintf_unfiltered (gdb_stdlog
,
6053 "Psymtab for %s unit @0x%x: %s - %s"
6054 ", %d global, %d static syms\n",
6055 per_cu
->is_debug_types
? "type" : "comp",
6056 per_cu
->offset
.sect_off
,
6057 paddress (gdbarch
, pst
->textlow
),
6058 paddress (gdbarch
, pst
->texthigh
),
6059 pst
->n_global_syms
, pst
->n_static_syms
);
6063 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6064 Process compilation unit THIS_CU for a psymtab. */
6067 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6068 int want_partial_unit
,
6069 enum language pretend_language
)
6071 struct process_psymtab_comp_unit_data info
;
6073 /* If this compilation unit was already read in, free the
6074 cached copy in order to read it in again. This is
6075 necessary because we skipped some symbols when we first
6076 read in the compilation unit (see load_partial_dies).
6077 This problem could be avoided, but the benefit is unclear. */
6078 if (this_cu
->cu
!= NULL
)
6079 free_one_cached_comp_unit (this_cu
);
6081 gdb_assert (! this_cu
->is_debug_types
);
6082 info
.want_partial_unit
= want_partial_unit
;
6083 info
.pretend_language
= pretend_language
;
6084 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6085 process_psymtab_comp_unit_reader
,
6088 /* Age out any secondary CUs. */
6089 age_cached_comp_units ();
6092 /* Reader function for build_type_psymtabs. */
6095 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6096 const gdb_byte
*info_ptr
,
6097 struct die_info
*type_unit_die
,
6101 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6102 struct dwarf2_cu
*cu
= reader
->cu
;
6103 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6104 struct signatured_type
*sig_type
;
6105 struct type_unit_group
*tu_group
;
6106 struct attribute
*attr
;
6107 struct partial_die_info
*first_die
;
6108 CORE_ADDR lowpc
, highpc
;
6109 struct partial_symtab
*pst
;
6111 gdb_assert (data
== NULL
);
6112 gdb_assert (per_cu
->is_debug_types
);
6113 sig_type
= (struct signatured_type
*) per_cu
;
6118 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6119 tu_group
= get_type_unit_group (cu
, attr
);
6121 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6123 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6124 cu
->list_in_scope
= &file_symbols
;
6125 pst
= create_partial_symtab (per_cu
, "");
6128 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6130 lowpc
= (CORE_ADDR
) -1;
6131 highpc
= (CORE_ADDR
) 0;
6132 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6134 end_psymtab_common (objfile
, pst
);
6137 /* Struct used to sort TUs by their abbreviation table offset. */
6139 struct tu_abbrev_offset
6141 struct signatured_type
*sig_type
;
6142 sect_offset abbrev_offset
;
6145 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6148 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6150 const struct tu_abbrev_offset
* const *a
= ap
;
6151 const struct tu_abbrev_offset
* const *b
= bp
;
6152 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6153 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6155 return (aoff
> boff
) - (aoff
< boff
);
6158 /* Efficiently read all the type units.
6159 This does the bulk of the work for build_type_psymtabs.
6161 The efficiency is because we sort TUs by the abbrev table they use and
6162 only read each abbrev table once. In one program there are 200K TUs
6163 sharing 8K abbrev tables.
6165 The main purpose of this function is to support building the
6166 dwarf2_per_objfile->type_unit_groups table.
6167 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6168 can collapse the search space by grouping them by stmt_list.
6169 The savings can be significant, in the same program from above the 200K TUs
6170 share 8K stmt_list tables.
6172 FUNC is expected to call get_type_unit_group, which will create the
6173 struct type_unit_group if necessary and add it to
6174 dwarf2_per_objfile->type_unit_groups. */
6177 build_type_psymtabs_1 (void)
6179 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6180 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6181 struct cleanup
*cleanups
;
6182 struct abbrev_table
*abbrev_table
;
6183 sect_offset abbrev_offset
;
6184 struct tu_abbrev_offset
*sorted_by_abbrev
;
6185 struct type_unit_group
**iter
;
6188 /* It's up to the caller to not call us multiple times. */
6189 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6191 if (dwarf2_per_objfile
->n_type_units
== 0)
6194 /* TUs typically share abbrev tables, and there can be way more TUs than
6195 abbrev tables. Sort by abbrev table to reduce the number of times we
6196 read each abbrev table in.
6197 Alternatives are to punt or to maintain a cache of abbrev tables.
6198 This is simpler and efficient enough for now.
6200 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6201 symtab to use). Typically TUs with the same abbrev offset have the same
6202 stmt_list value too so in practice this should work well.
6204 The basic algorithm here is:
6206 sort TUs by abbrev table
6207 for each TU with same abbrev table:
6208 read abbrev table if first user
6209 read TU top level DIE
6210 [IWBN if DWO skeletons had DW_AT_stmt_list]
6213 if (dwarf_read_debug
)
6214 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6216 /* Sort in a separate table to maintain the order of all_type_units
6217 for .gdb_index: TU indices directly index all_type_units. */
6218 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6219 dwarf2_per_objfile
->n_type_units
);
6220 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6222 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6224 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6225 sorted_by_abbrev
[i
].abbrev_offset
=
6226 read_abbrev_offset (sig_type
->per_cu
.section
,
6227 sig_type
->per_cu
.offset
);
6229 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6230 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6231 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6233 abbrev_offset
.sect_off
= ~(unsigned) 0;
6234 abbrev_table
= NULL
;
6235 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6237 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6239 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6241 /* Switch to the next abbrev table if necessary. */
6242 if (abbrev_table
== NULL
6243 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6245 if (abbrev_table
!= NULL
)
6247 abbrev_table_free (abbrev_table
);
6248 /* Reset to NULL in case abbrev_table_read_table throws
6249 an error: abbrev_table_free_cleanup will get called. */
6250 abbrev_table
= NULL
;
6252 abbrev_offset
= tu
->abbrev_offset
;
6254 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6256 ++tu_stats
->nr_uniq_abbrev_tables
;
6259 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6260 build_type_psymtabs_reader
, NULL
);
6263 do_cleanups (cleanups
);
6266 /* Print collected type unit statistics. */
6269 print_tu_stats (void)
6271 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6273 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6274 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6275 dwarf2_per_objfile
->n_type_units
);
6276 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6277 tu_stats
->nr_uniq_abbrev_tables
);
6278 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6279 tu_stats
->nr_symtabs
);
6280 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6281 tu_stats
->nr_symtab_sharers
);
6282 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6283 tu_stats
->nr_stmt_less_type_units
);
6284 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6285 tu_stats
->nr_all_type_units_reallocs
);
6288 /* Traversal function for build_type_psymtabs. */
6291 build_type_psymtab_dependencies (void **slot
, void *info
)
6293 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6294 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6295 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6296 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6297 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6298 struct signatured_type
*iter
;
6301 gdb_assert (len
> 0);
6302 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6304 pst
->number_of_dependencies
= len
;
6305 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6306 len
* sizeof (struct psymtab
*));
6308 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6311 gdb_assert (iter
->per_cu
.is_debug_types
);
6312 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6313 iter
->type_unit_group
= tu_group
;
6316 VEC_free (sig_type_ptr
, tu_group
->tus
);
6321 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6322 Build partial symbol tables for the .debug_types comp-units. */
6325 build_type_psymtabs (struct objfile
*objfile
)
6327 if (! create_all_type_units (objfile
))
6330 build_type_psymtabs_1 ();
6333 /* Traversal function for process_skeletonless_type_unit.
6334 Read a TU in a DWO file and build partial symbols for it. */
6337 process_skeletonless_type_unit (void **slot
, void *info
)
6339 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6340 struct objfile
*objfile
= info
;
6341 struct signatured_type find_entry
, *entry
;
6343 /* If this TU doesn't exist in the global table, add it and read it in. */
6345 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6347 dwarf2_per_objfile
->signatured_types
6348 = allocate_signatured_type_table (objfile
);
6351 find_entry
.signature
= dwo_unit
->signature
;
6352 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6354 /* If we've already seen this type there's nothing to do. What's happening
6355 is we're doing our own version of comdat-folding here. */
6359 /* This does the job that create_all_type_units would have done for
6361 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6362 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6365 /* This does the job that build_type_psymtabs_1 would have done. */
6366 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6367 build_type_psymtabs_reader
, NULL
);
6372 /* Traversal function for process_skeletonless_type_units. */
6375 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6377 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6379 if (dwo_file
->tus
!= NULL
)
6381 htab_traverse_noresize (dwo_file
->tus
,
6382 process_skeletonless_type_unit
, info
);
6388 /* Scan all TUs of DWO files, verifying we've processed them.
6389 This is needed in case a TU was emitted without its skeleton.
6390 Note: This can't be done until we know what all the DWO files are. */
6393 process_skeletonless_type_units (struct objfile
*objfile
)
6395 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6396 if (get_dwp_file () == NULL
6397 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6399 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6400 process_dwo_file_for_skeletonless_type_units
,
6405 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6408 psymtabs_addrmap_cleanup (void *o
)
6410 struct objfile
*objfile
= o
;
6412 objfile
->psymtabs_addrmap
= NULL
;
6415 /* Compute the 'user' field for each psymtab in OBJFILE. */
6418 set_partial_user (struct objfile
*objfile
)
6422 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6424 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6425 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6431 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6433 /* Set the 'user' field only if it is not already set. */
6434 if (pst
->dependencies
[j
]->user
== NULL
)
6435 pst
->dependencies
[j
]->user
= pst
;
6440 /* Build the partial symbol table by doing a quick pass through the
6441 .debug_info and .debug_abbrev sections. */
6444 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6446 struct cleanup
*back_to
, *addrmap_cleanup
;
6447 struct obstack temp_obstack
;
6450 if (dwarf_read_debug
)
6452 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6453 objfile_name (objfile
));
6456 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6458 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6460 /* Any cached compilation units will be linked by the per-objfile
6461 read_in_chain. Make sure to free them when we're done. */
6462 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6464 build_type_psymtabs (objfile
);
6466 create_all_comp_units (objfile
);
6468 /* Create a temporary address map on a temporary obstack. We later
6469 copy this to the final obstack. */
6470 obstack_init (&temp_obstack
);
6471 make_cleanup_obstack_free (&temp_obstack
);
6472 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6473 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6475 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6477 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6479 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6482 /* This has to wait until we read the CUs, we need the list of DWOs. */
6483 process_skeletonless_type_units (objfile
);
6485 /* Now that all TUs have been processed we can fill in the dependencies. */
6486 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6488 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6489 build_type_psymtab_dependencies
, NULL
);
6492 if (dwarf_read_debug
)
6495 set_partial_user (objfile
);
6497 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6498 &objfile
->objfile_obstack
);
6499 discard_cleanups (addrmap_cleanup
);
6501 do_cleanups (back_to
);
6503 if (dwarf_read_debug
)
6504 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6505 objfile_name (objfile
));
6508 /* die_reader_func for load_partial_comp_unit. */
6511 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6512 const gdb_byte
*info_ptr
,
6513 struct die_info
*comp_unit_die
,
6517 struct dwarf2_cu
*cu
= reader
->cu
;
6519 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6521 /* Check if comp unit has_children.
6522 If so, read the rest of the partial symbols from this comp unit.
6523 If not, there's no more debug_info for this comp unit. */
6525 load_partial_dies (reader
, info_ptr
, 0);
6528 /* Load the partial DIEs for a secondary CU into memory.
6529 This is also used when rereading a primary CU with load_all_dies. */
6532 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6534 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6535 load_partial_comp_unit_reader
, NULL
);
6539 read_comp_units_from_section (struct objfile
*objfile
,
6540 struct dwarf2_section_info
*section
,
6541 unsigned int is_dwz
,
6544 struct dwarf2_per_cu_data
***all_comp_units
)
6546 const gdb_byte
*info_ptr
;
6547 bfd
*abfd
= get_section_bfd_owner (section
);
6549 if (dwarf_read_debug
)
6550 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6551 get_section_name (section
),
6552 get_section_file_name (section
));
6554 dwarf2_read_section (objfile
, section
);
6556 info_ptr
= section
->buffer
;
6558 while (info_ptr
< section
->buffer
+ section
->size
)
6560 unsigned int length
, initial_length_size
;
6561 struct dwarf2_per_cu_data
*this_cu
;
6564 offset
.sect_off
= info_ptr
- section
->buffer
;
6566 /* Read just enough information to find out where the next
6567 compilation unit is. */
6568 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6570 /* Save the compilation unit for later lookup. */
6571 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6572 sizeof (struct dwarf2_per_cu_data
));
6573 memset (this_cu
, 0, sizeof (*this_cu
));
6574 this_cu
->offset
= offset
;
6575 this_cu
->length
= length
+ initial_length_size
;
6576 this_cu
->is_dwz
= is_dwz
;
6577 this_cu
->objfile
= objfile
;
6578 this_cu
->section
= section
;
6580 if (*n_comp_units
== *n_allocated
)
6583 *all_comp_units
= xrealloc (*all_comp_units
,
6585 * sizeof (struct dwarf2_per_cu_data
*));
6587 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6590 info_ptr
= info_ptr
+ this_cu
->length
;
6594 /* Create a list of all compilation units in OBJFILE.
6595 This is only done for -readnow and building partial symtabs. */
6598 create_all_comp_units (struct objfile
*objfile
)
6602 struct dwarf2_per_cu_data
**all_comp_units
;
6603 struct dwz_file
*dwz
;
6607 all_comp_units
= xmalloc (n_allocated
6608 * sizeof (struct dwarf2_per_cu_data
*));
6610 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6611 &n_allocated
, &n_comp_units
, &all_comp_units
);
6613 dwz
= dwarf2_get_dwz_file ();
6615 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6616 &n_allocated
, &n_comp_units
,
6619 dwarf2_per_objfile
->all_comp_units
6620 = obstack_alloc (&objfile
->objfile_obstack
,
6621 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6622 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6623 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6624 xfree (all_comp_units
);
6625 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6628 /* Process all loaded DIEs for compilation unit CU, starting at
6629 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6630 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6631 DW_AT_ranges). See the comments of add_partial_subprogram on how
6632 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6635 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6636 CORE_ADDR
*highpc
, int set_addrmap
,
6637 struct dwarf2_cu
*cu
)
6639 struct partial_die_info
*pdi
;
6641 /* Now, march along the PDI's, descending into ones which have
6642 interesting children but skipping the children of the other ones,
6643 until we reach the end of the compilation unit. */
6649 fixup_partial_die (pdi
, cu
);
6651 /* Anonymous namespaces or modules have no name but have interesting
6652 children, so we need to look at them. Ditto for anonymous
6655 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6656 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6657 || pdi
->tag
== DW_TAG_imported_unit
)
6661 case DW_TAG_subprogram
:
6662 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6664 case DW_TAG_constant
:
6665 case DW_TAG_variable
:
6666 case DW_TAG_typedef
:
6667 case DW_TAG_union_type
:
6668 if (!pdi
->is_declaration
)
6670 add_partial_symbol (pdi
, cu
);
6673 case DW_TAG_class_type
:
6674 case DW_TAG_interface_type
:
6675 case DW_TAG_structure_type
:
6676 if (!pdi
->is_declaration
)
6678 add_partial_symbol (pdi
, cu
);
6681 case DW_TAG_enumeration_type
:
6682 if (!pdi
->is_declaration
)
6683 add_partial_enumeration (pdi
, cu
);
6685 case DW_TAG_base_type
:
6686 case DW_TAG_subrange_type
:
6687 /* File scope base type definitions are added to the partial
6689 add_partial_symbol (pdi
, cu
);
6691 case DW_TAG_namespace
:
6692 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6695 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6697 case DW_TAG_imported_unit
:
6699 struct dwarf2_per_cu_data
*per_cu
;
6701 /* For now we don't handle imported units in type units. */
6702 if (cu
->per_cu
->is_debug_types
)
6704 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6705 " supported in type units [in module %s]"),
6706 objfile_name (cu
->objfile
));
6709 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6713 /* Go read the partial unit, if needed. */
6714 if (per_cu
->v
.psymtab
== NULL
)
6715 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6717 VEC_safe_push (dwarf2_per_cu_ptr
,
6718 cu
->per_cu
->imported_symtabs
, per_cu
);
6721 case DW_TAG_imported_declaration
:
6722 add_partial_symbol (pdi
, cu
);
6729 /* If the die has a sibling, skip to the sibling. */
6731 pdi
= pdi
->die_sibling
;
6735 /* Functions used to compute the fully scoped name of a partial DIE.
6737 Normally, this is simple. For C++, the parent DIE's fully scoped
6738 name is concatenated with "::" and the partial DIE's name. For
6739 Java, the same thing occurs except that "." is used instead of "::".
6740 Enumerators are an exception; they use the scope of their parent
6741 enumeration type, i.e. the name of the enumeration type is not
6742 prepended to the enumerator.
6744 There are two complexities. One is DW_AT_specification; in this
6745 case "parent" means the parent of the target of the specification,
6746 instead of the direct parent of the DIE. The other is compilers
6747 which do not emit DW_TAG_namespace; in this case we try to guess
6748 the fully qualified name of structure types from their members'
6749 linkage names. This must be done using the DIE's children rather
6750 than the children of any DW_AT_specification target. We only need
6751 to do this for structures at the top level, i.e. if the target of
6752 any DW_AT_specification (if any; otherwise the DIE itself) does not
6755 /* Compute the scope prefix associated with PDI's parent, in
6756 compilation unit CU. The result will be allocated on CU's
6757 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6758 field. NULL is returned if no prefix is necessary. */
6760 partial_die_parent_scope (struct partial_die_info
*pdi
,
6761 struct dwarf2_cu
*cu
)
6763 const char *grandparent_scope
;
6764 struct partial_die_info
*parent
, *real_pdi
;
6766 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6767 then this means the parent of the specification DIE. */
6770 while (real_pdi
->has_specification
)
6771 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6772 real_pdi
->spec_is_dwz
, cu
);
6774 parent
= real_pdi
->die_parent
;
6778 if (parent
->scope_set
)
6779 return parent
->scope
;
6781 fixup_partial_die (parent
, cu
);
6783 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6785 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6786 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6787 Work around this problem here. */
6788 if (cu
->language
== language_cplus
6789 && parent
->tag
== DW_TAG_namespace
6790 && strcmp (parent
->name
, "::") == 0
6791 && grandparent_scope
== NULL
)
6793 parent
->scope
= NULL
;
6794 parent
->scope_set
= 1;
6798 if (pdi
->tag
== DW_TAG_enumerator
)
6799 /* Enumerators should not get the name of the enumeration as a prefix. */
6800 parent
->scope
= grandparent_scope
;
6801 else if (parent
->tag
== DW_TAG_namespace
6802 || parent
->tag
== DW_TAG_module
6803 || parent
->tag
== DW_TAG_structure_type
6804 || parent
->tag
== DW_TAG_class_type
6805 || parent
->tag
== DW_TAG_interface_type
6806 || parent
->tag
== DW_TAG_union_type
6807 || parent
->tag
== DW_TAG_enumeration_type
)
6809 if (grandparent_scope
== NULL
)
6810 parent
->scope
= parent
->name
;
6812 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6814 parent
->name
, 0, cu
);
6818 /* FIXME drow/2004-04-01: What should we be doing with
6819 function-local names? For partial symbols, we should probably be
6821 complaint (&symfile_complaints
,
6822 _("unhandled containing DIE tag %d for DIE at %d"),
6823 parent
->tag
, pdi
->offset
.sect_off
);
6824 parent
->scope
= grandparent_scope
;
6827 parent
->scope_set
= 1;
6828 return parent
->scope
;
6831 /* Return the fully scoped name associated with PDI, from compilation unit
6832 CU. The result will be allocated with malloc. */
6835 partial_die_full_name (struct partial_die_info
*pdi
,
6836 struct dwarf2_cu
*cu
)
6838 const char *parent_scope
;
6840 /* If this is a template instantiation, we can not work out the
6841 template arguments from partial DIEs. So, unfortunately, we have
6842 to go through the full DIEs. At least any work we do building
6843 types here will be reused if full symbols are loaded later. */
6844 if (pdi
->has_template_arguments
)
6846 fixup_partial_die (pdi
, cu
);
6848 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6850 struct die_info
*die
;
6851 struct attribute attr
;
6852 struct dwarf2_cu
*ref_cu
= cu
;
6854 /* DW_FORM_ref_addr is using section offset. */
6856 attr
.form
= DW_FORM_ref_addr
;
6857 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6858 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6860 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6864 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6865 if (parent_scope
== NULL
)
6868 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6872 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6874 struct objfile
*objfile
= cu
->objfile
;
6875 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6877 const char *actual_name
= NULL
;
6879 char *built_actual_name
;
6881 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6883 built_actual_name
= partial_die_full_name (pdi
, cu
);
6884 if (built_actual_name
!= NULL
)
6885 actual_name
= built_actual_name
;
6887 if (actual_name
== NULL
)
6888 actual_name
= pdi
->name
;
6892 case DW_TAG_subprogram
:
6893 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6894 if (pdi
->is_external
|| cu
->language
== language_ada
)
6896 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6897 of the global scope. But in Ada, we want to be able to access
6898 nested procedures globally. So all Ada subprograms are stored
6899 in the global scope. */
6900 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6902 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6903 built_actual_name
!= NULL
,
6904 VAR_DOMAIN
, LOC_BLOCK
,
6905 &objfile
->global_psymbols
,
6906 0, addr
, cu
->language
, objfile
);
6910 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6912 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6913 built_actual_name
!= NULL
,
6914 VAR_DOMAIN
, LOC_BLOCK
,
6915 &objfile
->static_psymbols
,
6916 0, addr
, cu
->language
, objfile
);
6919 case DW_TAG_constant
:
6921 struct psymbol_allocation_list
*list
;
6923 if (pdi
->is_external
)
6924 list
= &objfile
->global_psymbols
;
6926 list
= &objfile
->static_psymbols
;
6927 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6928 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6929 list
, 0, 0, cu
->language
, objfile
);
6932 case DW_TAG_variable
:
6934 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6938 && !dwarf2_per_objfile
->has_section_at_zero
)
6940 /* A global or static variable may also have been stripped
6941 out by the linker if unused, in which case its address
6942 will be nullified; do not add such variables into partial
6943 symbol table then. */
6945 else if (pdi
->is_external
)
6948 Don't enter into the minimal symbol tables as there is
6949 a minimal symbol table entry from the ELF symbols already.
6950 Enter into partial symbol table if it has a location
6951 descriptor or a type.
6952 If the location descriptor is missing, new_symbol will create
6953 a LOC_UNRESOLVED symbol, the address of the variable will then
6954 be determined from the minimal symbol table whenever the variable
6956 The address for the partial symbol table entry is not
6957 used by GDB, but it comes in handy for debugging partial symbol
6960 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6961 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6962 built_actual_name
!= NULL
,
6963 VAR_DOMAIN
, LOC_STATIC
,
6964 &objfile
->global_psymbols
,
6966 cu
->language
, objfile
);
6970 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6972 /* Static Variable. Skip symbols whose value we cannot know (those
6973 without location descriptors or constant values). */
6974 if (!has_loc
&& !pdi
->has_const_value
)
6976 xfree (built_actual_name
);
6980 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6981 mst_file_data, objfile); */
6982 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6983 built_actual_name
!= NULL
,
6984 VAR_DOMAIN
, LOC_STATIC
,
6985 &objfile
->static_psymbols
,
6987 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6988 cu
->language
, objfile
);
6991 case DW_TAG_typedef
:
6992 case DW_TAG_base_type
:
6993 case DW_TAG_subrange_type
:
6994 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6995 built_actual_name
!= NULL
,
6996 VAR_DOMAIN
, LOC_TYPEDEF
,
6997 &objfile
->static_psymbols
,
6998 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7000 case DW_TAG_imported_declaration
:
7001 case DW_TAG_namespace
:
7002 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7003 built_actual_name
!= NULL
,
7004 VAR_DOMAIN
, LOC_TYPEDEF
,
7005 &objfile
->global_psymbols
,
7006 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7009 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7010 built_actual_name
!= NULL
,
7011 MODULE_DOMAIN
, LOC_TYPEDEF
,
7012 &objfile
->global_psymbols
,
7013 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7015 case DW_TAG_class_type
:
7016 case DW_TAG_interface_type
:
7017 case DW_TAG_structure_type
:
7018 case DW_TAG_union_type
:
7019 case DW_TAG_enumeration_type
:
7020 /* Skip external references. The DWARF standard says in the section
7021 about "Structure, Union, and Class Type Entries": "An incomplete
7022 structure, union or class type is represented by a structure,
7023 union or class entry that does not have a byte size attribute
7024 and that has a DW_AT_declaration attribute." */
7025 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7027 xfree (built_actual_name
);
7031 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7032 static vs. global. */
7033 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7034 built_actual_name
!= NULL
,
7035 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7036 (cu
->language
== language_cplus
7037 || cu
->language
== language_java
)
7038 ? &objfile
->global_psymbols
7039 : &objfile
->static_psymbols
,
7040 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7043 case DW_TAG_enumerator
:
7044 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7045 built_actual_name
!= NULL
,
7046 VAR_DOMAIN
, LOC_CONST
,
7047 (cu
->language
== language_cplus
7048 || cu
->language
== language_java
)
7049 ? &objfile
->global_psymbols
7050 : &objfile
->static_psymbols
,
7051 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7057 xfree (built_actual_name
);
7060 /* Read a partial die corresponding to a namespace; also, add a symbol
7061 corresponding to that namespace to the symbol table. NAMESPACE is
7062 the name of the enclosing namespace. */
7065 add_partial_namespace (struct partial_die_info
*pdi
,
7066 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7067 int set_addrmap
, struct dwarf2_cu
*cu
)
7069 /* Add a symbol for the namespace. */
7071 add_partial_symbol (pdi
, cu
);
7073 /* Now scan partial symbols in that namespace. */
7075 if (pdi
->has_children
)
7076 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7079 /* Read a partial die corresponding to a Fortran module. */
7082 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7083 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7085 /* Add a symbol for the namespace. */
7087 add_partial_symbol (pdi
, cu
);
7089 /* Now scan partial symbols in that module. */
7091 if (pdi
->has_children
)
7092 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7095 /* Read a partial die corresponding to a subprogram and create a partial
7096 symbol for that subprogram. When the CU language allows it, this
7097 routine also defines a partial symbol for each nested subprogram
7098 that this subprogram contains. If SET_ADDRMAP is true, record the
7099 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7100 and highest PC values found in PDI.
7102 PDI may also be a lexical block, in which case we simply search
7103 recursively for subprograms defined inside that lexical block.
7104 Again, this is only performed when the CU language allows this
7105 type of definitions. */
7108 add_partial_subprogram (struct partial_die_info
*pdi
,
7109 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7110 int set_addrmap
, struct dwarf2_cu
*cu
)
7112 if (pdi
->tag
== DW_TAG_subprogram
)
7114 if (pdi
->has_pc_info
)
7116 if (pdi
->lowpc
< *lowpc
)
7117 *lowpc
= pdi
->lowpc
;
7118 if (pdi
->highpc
> *highpc
)
7119 *highpc
= pdi
->highpc
;
7122 struct objfile
*objfile
= cu
->objfile
;
7123 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7128 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7129 SECT_OFF_TEXT (objfile
));
7130 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7131 pdi
->lowpc
+ baseaddr
);
7132 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7133 pdi
->highpc
+ baseaddr
);
7134 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7135 cu
->per_cu
->v
.psymtab
);
7139 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7141 if (!pdi
->is_declaration
)
7142 /* Ignore subprogram DIEs that do not have a name, they are
7143 illegal. Do not emit a complaint at this point, we will
7144 do so when we convert this psymtab into a symtab. */
7146 add_partial_symbol (pdi
, cu
);
7150 if (! pdi
->has_children
)
7153 if (cu
->language
== language_ada
)
7155 pdi
= pdi
->die_child
;
7158 fixup_partial_die (pdi
, cu
);
7159 if (pdi
->tag
== DW_TAG_subprogram
7160 || pdi
->tag
== DW_TAG_lexical_block
)
7161 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7162 pdi
= pdi
->die_sibling
;
7167 /* Read a partial die corresponding to an enumeration type. */
7170 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7171 struct dwarf2_cu
*cu
)
7173 struct partial_die_info
*pdi
;
7175 if (enum_pdi
->name
!= NULL
)
7176 add_partial_symbol (enum_pdi
, cu
);
7178 pdi
= enum_pdi
->die_child
;
7181 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7182 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7184 add_partial_symbol (pdi
, cu
);
7185 pdi
= pdi
->die_sibling
;
7189 /* Return the initial uleb128 in the die at INFO_PTR. */
7192 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7194 unsigned int bytes_read
;
7196 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7199 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7200 Return the corresponding abbrev, or NULL if the number is zero (indicating
7201 an empty DIE). In either case *BYTES_READ will be set to the length of
7202 the initial number. */
7204 static struct abbrev_info
*
7205 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7206 struct dwarf2_cu
*cu
)
7208 bfd
*abfd
= cu
->objfile
->obfd
;
7209 unsigned int abbrev_number
;
7210 struct abbrev_info
*abbrev
;
7212 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7214 if (abbrev_number
== 0)
7217 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7220 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7221 " at offset 0x%x [in module %s]"),
7222 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7223 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7229 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7230 Returns a pointer to the end of a series of DIEs, terminated by an empty
7231 DIE. Any children of the skipped DIEs will also be skipped. */
7233 static const gdb_byte
*
7234 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7236 struct dwarf2_cu
*cu
= reader
->cu
;
7237 struct abbrev_info
*abbrev
;
7238 unsigned int bytes_read
;
7242 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7244 return info_ptr
+ bytes_read
;
7246 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7250 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7251 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7252 abbrev corresponding to that skipped uleb128 should be passed in
7253 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7256 static const gdb_byte
*
7257 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7258 struct abbrev_info
*abbrev
)
7260 unsigned int bytes_read
;
7261 struct attribute attr
;
7262 bfd
*abfd
= reader
->abfd
;
7263 struct dwarf2_cu
*cu
= reader
->cu
;
7264 const gdb_byte
*buffer
= reader
->buffer
;
7265 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7266 const gdb_byte
*start_info_ptr
= info_ptr
;
7267 unsigned int form
, i
;
7269 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7271 /* The only abbrev we care about is DW_AT_sibling. */
7272 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7274 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7275 if (attr
.form
== DW_FORM_ref_addr
)
7276 complaint (&symfile_complaints
,
7277 _("ignoring absolute DW_AT_sibling"));
7280 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7281 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7283 if (sibling_ptr
< info_ptr
)
7284 complaint (&symfile_complaints
,
7285 _("DW_AT_sibling points backwards"));
7286 else if (sibling_ptr
> reader
->buffer_end
)
7287 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7293 /* If it isn't DW_AT_sibling, skip this attribute. */
7294 form
= abbrev
->attrs
[i
].form
;
7298 case DW_FORM_ref_addr
:
7299 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7300 and later it is offset sized. */
7301 if (cu
->header
.version
== 2)
7302 info_ptr
+= cu
->header
.addr_size
;
7304 info_ptr
+= cu
->header
.offset_size
;
7306 case DW_FORM_GNU_ref_alt
:
7307 info_ptr
+= cu
->header
.offset_size
;
7310 info_ptr
+= cu
->header
.addr_size
;
7317 case DW_FORM_flag_present
:
7329 case DW_FORM_ref_sig8
:
7332 case DW_FORM_string
:
7333 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7334 info_ptr
+= bytes_read
;
7336 case DW_FORM_sec_offset
:
7338 case DW_FORM_GNU_strp_alt
:
7339 info_ptr
+= cu
->header
.offset_size
;
7341 case DW_FORM_exprloc
:
7343 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7344 info_ptr
+= bytes_read
;
7346 case DW_FORM_block1
:
7347 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7349 case DW_FORM_block2
:
7350 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7352 case DW_FORM_block4
:
7353 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7357 case DW_FORM_ref_udata
:
7358 case DW_FORM_GNU_addr_index
:
7359 case DW_FORM_GNU_str_index
:
7360 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7362 case DW_FORM_indirect
:
7363 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7364 info_ptr
+= bytes_read
;
7365 /* We need to continue parsing from here, so just go back to
7367 goto skip_attribute
;
7370 error (_("Dwarf Error: Cannot handle %s "
7371 "in DWARF reader [in module %s]"),
7372 dwarf_form_name (form
),
7373 bfd_get_filename (abfd
));
7377 if (abbrev
->has_children
)
7378 return skip_children (reader
, info_ptr
);
7383 /* Locate ORIG_PDI's sibling.
7384 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7386 static const gdb_byte
*
7387 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7388 struct partial_die_info
*orig_pdi
,
7389 const gdb_byte
*info_ptr
)
7391 /* Do we know the sibling already? */
7393 if (orig_pdi
->sibling
)
7394 return orig_pdi
->sibling
;
7396 /* Are there any children to deal with? */
7398 if (!orig_pdi
->has_children
)
7401 /* Skip the children the long way. */
7403 return skip_children (reader
, info_ptr
);
7406 /* Expand this partial symbol table into a full symbol table. SELF is
7410 dwarf2_read_symtab (struct partial_symtab
*self
,
7411 struct objfile
*objfile
)
7415 warning (_("bug: psymtab for %s is already read in."),
7422 printf_filtered (_("Reading in symbols for %s..."),
7424 gdb_flush (gdb_stdout
);
7427 /* Restore our global data. */
7428 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7430 /* If this psymtab is constructed from a debug-only objfile, the
7431 has_section_at_zero flag will not necessarily be correct. We
7432 can get the correct value for this flag by looking at the data
7433 associated with the (presumably stripped) associated objfile. */
7434 if (objfile
->separate_debug_objfile_backlink
)
7436 struct dwarf2_per_objfile
*dpo_backlink
7437 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7438 dwarf2_objfile_data_key
);
7440 dwarf2_per_objfile
->has_section_at_zero
7441 = dpo_backlink
->has_section_at_zero
;
7444 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7446 psymtab_to_symtab_1 (self
);
7448 /* Finish up the debug error message. */
7450 printf_filtered (_("done.\n"));
7453 process_cu_includes ();
7456 /* Reading in full CUs. */
7458 /* Add PER_CU to the queue. */
7461 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7462 enum language pretend_language
)
7464 struct dwarf2_queue_item
*item
;
7467 item
= xmalloc (sizeof (*item
));
7468 item
->per_cu
= per_cu
;
7469 item
->pretend_language
= pretend_language
;
7472 if (dwarf2_queue
== NULL
)
7473 dwarf2_queue
= item
;
7475 dwarf2_queue_tail
->next
= item
;
7477 dwarf2_queue_tail
= item
;
7480 /* If PER_CU is not yet queued, add it to the queue.
7481 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7483 The result is non-zero if PER_CU was queued, otherwise the result is zero
7484 meaning either PER_CU is already queued or it is already loaded.
7486 N.B. There is an invariant here that if a CU is queued then it is loaded.
7487 The caller is required to load PER_CU if we return non-zero. */
7490 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7491 struct dwarf2_per_cu_data
*per_cu
,
7492 enum language pretend_language
)
7494 /* We may arrive here during partial symbol reading, if we need full
7495 DIEs to process an unusual case (e.g. template arguments). Do
7496 not queue PER_CU, just tell our caller to load its DIEs. */
7497 if (dwarf2_per_objfile
->reading_partial_symbols
)
7499 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7504 /* Mark the dependence relation so that we don't flush PER_CU
7506 if (dependent_cu
!= NULL
)
7507 dwarf2_add_dependence (dependent_cu
, per_cu
);
7509 /* If it's already on the queue, we have nothing to do. */
7513 /* If the compilation unit is already loaded, just mark it as
7515 if (per_cu
->cu
!= NULL
)
7517 per_cu
->cu
->last_used
= 0;
7521 /* Add it to the queue. */
7522 queue_comp_unit (per_cu
, pretend_language
);
7527 /* Process the queue. */
7530 process_queue (void)
7532 struct dwarf2_queue_item
*item
, *next_item
;
7534 if (dwarf_read_debug
)
7536 fprintf_unfiltered (gdb_stdlog
,
7537 "Expanding one or more symtabs of objfile %s ...\n",
7538 objfile_name (dwarf2_per_objfile
->objfile
));
7541 /* The queue starts out with one item, but following a DIE reference
7542 may load a new CU, adding it to the end of the queue. */
7543 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7545 if ((dwarf2_per_objfile
->using_index
7546 ? !item
->per_cu
->v
.quick
->compunit_symtab
7547 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7548 /* Skip dummy CUs. */
7549 && item
->per_cu
->cu
!= NULL
)
7551 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7552 unsigned int debug_print_threshold
;
7555 if (per_cu
->is_debug_types
)
7557 struct signatured_type
*sig_type
=
7558 (struct signatured_type
*) per_cu
;
7560 sprintf (buf
, "TU %s at offset 0x%x",
7561 hex_string (sig_type
->signature
),
7562 per_cu
->offset
.sect_off
);
7563 /* There can be 100s of TUs.
7564 Only print them in verbose mode. */
7565 debug_print_threshold
= 2;
7569 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7570 debug_print_threshold
= 1;
7573 if (dwarf_read_debug
>= debug_print_threshold
)
7574 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7576 if (per_cu
->is_debug_types
)
7577 process_full_type_unit (per_cu
, item
->pretend_language
);
7579 process_full_comp_unit (per_cu
, item
->pretend_language
);
7581 if (dwarf_read_debug
>= debug_print_threshold
)
7582 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7585 item
->per_cu
->queued
= 0;
7586 next_item
= item
->next
;
7590 dwarf2_queue_tail
= NULL
;
7592 if (dwarf_read_debug
)
7594 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7595 objfile_name (dwarf2_per_objfile
->objfile
));
7599 /* Free all allocated queue entries. This function only releases anything if
7600 an error was thrown; if the queue was processed then it would have been
7601 freed as we went along. */
7604 dwarf2_release_queue (void *dummy
)
7606 struct dwarf2_queue_item
*item
, *last
;
7608 item
= dwarf2_queue
;
7611 /* Anything still marked queued is likely to be in an
7612 inconsistent state, so discard it. */
7613 if (item
->per_cu
->queued
)
7615 if (item
->per_cu
->cu
!= NULL
)
7616 free_one_cached_comp_unit (item
->per_cu
);
7617 item
->per_cu
->queued
= 0;
7625 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7628 /* Read in full symbols for PST, and anything it depends on. */
7631 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7633 struct dwarf2_per_cu_data
*per_cu
;
7639 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7640 if (!pst
->dependencies
[i
]->readin
7641 && pst
->dependencies
[i
]->user
== NULL
)
7643 /* Inform about additional files that need to be read in. */
7646 /* FIXME: i18n: Need to make this a single string. */
7647 fputs_filtered (" ", gdb_stdout
);
7649 fputs_filtered ("and ", gdb_stdout
);
7651 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7652 wrap_here (""); /* Flush output. */
7653 gdb_flush (gdb_stdout
);
7655 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7658 per_cu
= pst
->read_symtab_private
;
7662 /* It's an include file, no symbols to read for it.
7663 Everything is in the parent symtab. */
7668 dw2_do_instantiate_symtab (per_cu
);
7671 /* Trivial hash function for die_info: the hash value of a DIE
7672 is its offset in .debug_info for this objfile. */
7675 die_hash (const void *item
)
7677 const struct die_info
*die
= item
;
7679 return die
->offset
.sect_off
;
7682 /* Trivial comparison function for die_info structures: two DIEs
7683 are equal if they have the same offset. */
7686 die_eq (const void *item_lhs
, const void *item_rhs
)
7688 const struct die_info
*die_lhs
= item_lhs
;
7689 const struct die_info
*die_rhs
= item_rhs
;
7691 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7694 /* die_reader_func for load_full_comp_unit.
7695 This is identical to read_signatured_type_reader,
7696 but is kept separate for now. */
7699 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7700 const gdb_byte
*info_ptr
,
7701 struct die_info
*comp_unit_die
,
7705 struct dwarf2_cu
*cu
= reader
->cu
;
7706 enum language
*language_ptr
= data
;
7708 gdb_assert (cu
->die_hash
== NULL
);
7710 htab_create_alloc_ex (cu
->header
.length
/ 12,
7714 &cu
->comp_unit_obstack
,
7715 hashtab_obstack_allocate
,
7716 dummy_obstack_deallocate
);
7719 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7720 &info_ptr
, comp_unit_die
);
7721 cu
->dies
= comp_unit_die
;
7722 /* comp_unit_die is not stored in die_hash, no need. */
7724 /* We try not to read any attributes in this function, because not
7725 all CUs needed for references have been loaded yet, and symbol
7726 table processing isn't initialized. But we have to set the CU language,
7727 or we won't be able to build types correctly.
7728 Similarly, if we do not read the producer, we can not apply
7729 producer-specific interpretation. */
7730 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7733 /* Load the DIEs associated with PER_CU into memory. */
7736 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7737 enum language pretend_language
)
7739 gdb_assert (! this_cu
->is_debug_types
);
7741 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7742 load_full_comp_unit_reader
, &pretend_language
);
7745 /* Add a DIE to the delayed physname list. */
7748 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7749 const char *name
, struct die_info
*die
,
7750 struct dwarf2_cu
*cu
)
7752 struct delayed_method_info mi
;
7754 mi
.fnfield_index
= fnfield_index
;
7758 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7761 /* A cleanup for freeing the delayed method list. */
7764 free_delayed_list (void *ptr
)
7766 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7767 if (cu
->method_list
!= NULL
)
7769 VEC_free (delayed_method_info
, cu
->method_list
);
7770 cu
->method_list
= NULL
;
7774 /* Compute the physnames of any methods on the CU's method list.
7776 The computation of method physnames is delayed in order to avoid the
7777 (bad) condition that one of the method's formal parameters is of an as yet
7781 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7784 struct delayed_method_info
*mi
;
7785 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7787 const char *physname
;
7788 struct fn_fieldlist
*fn_flp
7789 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7790 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7791 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7792 = physname
? physname
: "";
7796 /* Go objects should be embedded in a DW_TAG_module DIE,
7797 and it's not clear if/how imported objects will appear.
7798 To keep Go support simple until that's worked out,
7799 go back through what we've read and create something usable.
7800 We could do this while processing each DIE, and feels kinda cleaner,
7801 but that way is more invasive.
7802 This is to, for example, allow the user to type "p var" or "b main"
7803 without having to specify the package name, and allow lookups
7804 of module.object to work in contexts that use the expression
7808 fixup_go_packaging (struct dwarf2_cu
*cu
)
7810 char *package_name
= NULL
;
7811 struct pending
*list
;
7814 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7816 for (i
= 0; i
< list
->nsyms
; ++i
)
7818 struct symbol
*sym
= list
->symbol
[i
];
7820 if (SYMBOL_LANGUAGE (sym
) == language_go
7821 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7823 char *this_package_name
= go_symbol_package_name (sym
);
7825 if (this_package_name
== NULL
)
7827 if (package_name
== NULL
)
7828 package_name
= this_package_name
;
7831 if (strcmp (package_name
, this_package_name
) != 0)
7832 complaint (&symfile_complaints
,
7833 _("Symtab %s has objects from two different Go packages: %s and %s"),
7834 (symbol_symtab (sym
) != NULL
7835 ? symtab_to_filename_for_display
7836 (symbol_symtab (sym
))
7837 : objfile_name (cu
->objfile
)),
7838 this_package_name
, package_name
);
7839 xfree (this_package_name
);
7845 if (package_name
!= NULL
)
7847 struct objfile
*objfile
= cu
->objfile
;
7848 const char *saved_package_name
7849 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7851 strlen (package_name
));
7852 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7853 saved_package_name
, objfile
);
7856 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7858 sym
= allocate_symbol (objfile
);
7859 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7860 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7861 strlen (saved_package_name
), 0, objfile
);
7862 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7863 e.g., "main" finds the "main" module and not C's main(). */
7864 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7865 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7866 SYMBOL_TYPE (sym
) = type
;
7868 add_symbol_to_list (sym
, &global_symbols
);
7870 xfree (package_name
);
7874 /* Return the symtab for PER_CU. This works properly regardless of
7875 whether we're using the index or psymtabs. */
7877 static struct compunit_symtab
*
7878 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7880 return (dwarf2_per_objfile
->using_index
7881 ? per_cu
->v
.quick
->compunit_symtab
7882 : per_cu
->v
.psymtab
->compunit_symtab
);
7885 /* A helper function for computing the list of all symbol tables
7886 included by PER_CU. */
7889 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7890 htab_t all_children
, htab_t all_type_symtabs
,
7891 struct dwarf2_per_cu_data
*per_cu
,
7892 struct compunit_symtab
*immediate_parent
)
7896 struct compunit_symtab
*cust
;
7897 struct dwarf2_per_cu_data
*iter
;
7899 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7902 /* This inclusion and its children have been processed. */
7907 /* Only add a CU if it has a symbol table. */
7908 cust
= get_compunit_symtab (per_cu
);
7911 /* If this is a type unit only add its symbol table if we haven't
7912 seen it yet (type unit per_cu's can share symtabs). */
7913 if (per_cu
->is_debug_types
)
7915 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7919 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7920 if (cust
->user
== NULL
)
7921 cust
->user
= immediate_parent
;
7926 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7927 if (cust
->user
== NULL
)
7928 cust
->user
= immediate_parent
;
7933 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7936 recursively_compute_inclusions (result
, all_children
,
7937 all_type_symtabs
, iter
, cust
);
7941 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7945 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7947 gdb_assert (! per_cu
->is_debug_types
);
7949 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7952 struct dwarf2_per_cu_data
*per_cu_iter
;
7953 struct compunit_symtab
*compunit_symtab_iter
;
7954 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7955 htab_t all_children
, all_type_symtabs
;
7956 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7958 /* If we don't have a symtab, we can just skip this case. */
7962 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7963 NULL
, xcalloc
, xfree
);
7964 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7965 NULL
, xcalloc
, xfree
);
7968 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7972 recursively_compute_inclusions (&result_symtabs
, all_children
,
7973 all_type_symtabs
, per_cu_iter
,
7977 /* Now we have a transitive closure of all the included symtabs. */
7978 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7980 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7981 (len
+ 1) * sizeof (struct compunit_symtab
*));
7983 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7984 compunit_symtab_iter
);
7986 cust
->includes
[ix
] = compunit_symtab_iter
;
7987 cust
->includes
[len
] = NULL
;
7989 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7990 htab_delete (all_children
);
7991 htab_delete (all_type_symtabs
);
7995 /* Compute the 'includes' field for the symtabs of all the CUs we just
7999 process_cu_includes (void)
8002 struct dwarf2_per_cu_data
*iter
;
8005 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8009 if (! iter
->is_debug_types
)
8010 compute_compunit_symtab_includes (iter
);
8013 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8016 /* Generate full symbol information for PER_CU, whose DIEs have
8017 already been loaded into memory. */
8020 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8021 enum language pretend_language
)
8023 struct dwarf2_cu
*cu
= per_cu
->cu
;
8024 struct objfile
*objfile
= per_cu
->objfile
;
8025 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8026 CORE_ADDR lowpc
, highpc
;
8027 struct compunit_symtab
*cust
;
8028 struct cleanup
*back_to
, *delayed_list_cleanup
;
8030 struct block
*static_block
;
8033 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8036 back_to
= make_cleanup (really_free_pendings
, NULL
);
8037 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8039 cu
->list_in_scope
= &file_symbols
;
8041 cu
->language
= pretend_language
;
8042 cu
->language_defn
= language_def (cu
->language
);
8044 /* Do line number decoding in read_file_scope () */
8045 process_die (cu
->dies
, cu
);
8047 /* For now fudge the Go package. */
8048 if (cu
->language
== language_go
)
8049 fixup_go_packaging (cu
);
8051 /* Now that we have processed all the DIEs in the CU, all the types
8052 should be complete, and it should now be safe to compute all of the
8054 compute_delayed_physnames (cu
);
8055 do_cleanups (delayed_list_cleanup
);
8057 /* Some compilers don't define a DW_AT_high_pc attribute for the
8058 compilation unit. If the DW_AT_high_pc is missing, synthesize
8059 it, by scanning the DIE's below the compilation unit. */
8060 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8062 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8063 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8065 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8066 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8067 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8068 addrmap to help ensure it has an accurate map of pc values belonging to
8070 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8072 cust
= end_symtab_from_static_block (static_block
,
8073 SECT_OFF_TEXT (objfile
), 0);
8077 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8079 /* Set symtab language to language from DW_AT_language. If the
8080 compilation is from a C file generated by language preprocessors, do
8081 not set the language if it was already deduced by start_subfile. */
8082 if (!(cu
->language
== language_c
8083 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8084 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8086 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8087 produce DW_AT_location with location lists but it can be possibly
8088 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8089 there were bugs in prologue debug info, fixed later in GCC-4.5
8090 by "unwind info for epilogues" patch (which is not directly related).
8092 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8093 needed, it would be wrong due to missing DW_AT_producer there.
8095 Still one can confuse GDB by using non-standard GCC compilation
8096 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8098 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8099 cust
->locations_valid
= 1;
8101 if (gcc_4_minor
>= 5)
8102 cust
->epilogue_unwind_valid
= 1;
8104 cust
->call_site_htab
= cu
->call_site_htab
;
8107 if (dwarf2_per_objfile
->using_index
)
8108 per_cu
->v
.quick
->compunit_symtab
= cust
;
8111 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8112 pst
->compunit_symtab
= cust
;
8116 /* Push it for inclusion processing later. */
8117 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8119 do_cleanups (back_to
);
8122 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8123 already been loaded into memory. */
8126 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8127 enum language pretend_language
)
8129 struct dwarf2_cu
*cu
= per_cu
->cu
;
8130 struct objfile
*objfile
= per_cu
->objfile
;
8131 struct compunit_symtab
*cust
;
8132 struct cleanup
*back_to
, *delayed_list_cleanup
;
8133 struct signatured_type
*sig_type
;
8135 gdb_assert (per_cu
->is_debug_types
);
8136 sig_type
= (struct signatured_type
*) per_cu
;
8139 back_to
= make_cleanup (really_free_pendings
, NULL
);
8140 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8142 cu
->list_in_scope
= &file_symbols
;
8144 cu
->language
= pretend_language
;
8145 cu
->language_defn
= language_def (cu
->language
);
8147 /* The symbol tables are set up in read_type_unit_scope. */
8148 process_die (cu
->dies
, cu
);
8150 /* For now fudge the Go package. */
8151 if (cu
->language
== language_go
)
8152 fixup_go_packaging (cu
);
8154 /* Now that we have processed all the DIEs in the CU, all the types
8155 should be complete, and it should now be safe to compute all of the
8157 compute_delayed_physnames (cu
);
8158 do_cleanups (delayed_list_cleanup
);
8160 /* TUs share symbol tables.
8161 If this is the first TU to use this symtab, complete the construction
8162 of it with end_expandable_symtab. Otherwise, complete the addition of
8163 this TU's symbols to the existing symtab. */
8164 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8166 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8167 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8171 /* Set symtab language to language from DW_AT_language. If the
8172 compilation is from a C file generated by language preprocessors,
8173 do not set the language if it was already deduced by
8175 if (!(cu
->language
== language_c
8176 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8177 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8182 augment_type_symtab ();
8183 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8186 if (dwarf2_per_objfile
->using_index
)
8187 per_cu
->v
.quick
->compunit_symtab
= cust
;
8190 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8191 pst
->compunit_symtab
= cust
;
8195 do_cleanups (back_to
);
8198 /* Process an imported unit DIE. */
8201 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8203 struct attribute
*attr
;
8205 /* For now we don't handle imported units in type units. */
8206 if (cu
->per_cu
->is_debug_types
)
8208 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8209 " supported in type units [in module %s]"),
8210 objfile_name (cu
->objfile
));
8213 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8216 struct dwarf2_per_cu_data
*per_cu
;
8217 struct symtab
*imported_symtab
;
8221 offset
= dwarf2_get_ref_die_offset (attr
);
8222 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8223 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8225 /* If necessary, add it to the queue and load its DIEs. */
8226 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8227 load_full_comp_unit (per_cu
, cu
->language
);
8229 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8234 /* Reset the in_process bit of a die. */
8237 reset_die_in_process (void *arg
)
8239 struct die_info
*die
= arg
;
8241 die
->in_process
= 0;
8244 /* Process a die and its children. */
8247 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8249 struct cleanup
*in_process
;
8251 /* We should only be processing those not already in process. */
8252 gdb_assert (!die
->in_process
);
8254 die
->in_process
= 1;
8255 in_process
= make_cleanup (reset_die_in_process
,die
);
8259 case DW_TAG_padding
:
8261 case DW_TAG_compile_unit
:
8262 case DW_TAG_partial_unit
:
8263 read_file_scope (die
, cu
);
8265 case DW_TAG_type_unit
:
8266 read_type_unit_scope (die
, cu
);
8268 case DW_TAG_subprogram
:
8269 case DW_TAG_inlined_subroutine
:
8270 read_func_scope (die
, cu
);
8272 case DW_TAG_lexical_block
:
8273 case DW_TAG_try_block
:
8274 case DW_TAG_catch_block
:
8275 read_lexical_block_scope (die
, cu
);
8277 case DW_TAG_GNU_call_site
:
8278 read_call_site_scope (die
, cu
);
8280 case DW_TAG_class_type
:
8281 case DW_TAG_interface_type
:
8282 case DW_TAG_structure_type
:
8283 case DW_TAG_union_type
:
8284 process_structure_scope (die
, cu
);
8286 case DW_TAG_enumeration_type
:
8287 process_enumeration_scope (die
, cu
);
8290 /* These dies have a type, but processing them does not create
8291 a symbol or recurse to process the children. Therefore we can
8292 read them on-demand through read_type_die. */
8293 case DW_TAG_subroutine_type
:
8294 case DW_TAG_set_type
:
8295 case DW_TAG_array_type
:
8296 case DW_TAG_pointer_type
:
8297 case DW_TAG_ptr_to_member_type
:
8298 case DW_TAG_reference_type
:
8299 case DW_TAG_string_type
:
8302 case DW_TAG_base_type
:
8303 case DW_TAG_subrange_type
:
8304 case DW_TAG_typedef
:
8305 /* Add a typedef symbol for the type definition, if it has a
8307 new_symbol (die
, read_type_die (die
, cu
), cu
);
8309 case DW_TAG_common_block
:
8310 read_common_block (die
, cu
);
8312 case DW_TAG_common_inclusion
:
8314 case DW_TAG_namespace
:
8315 cu
->processing_has_namespace_info
= 1;
8316 read_namespace (die
, cu
);
8319 cu
->processing_has_namespace_info
= 1;
8320 read_module (die
, cu
);
8322 case DW_TAG_imported_declaration
:
8323 cu
->processing_has_namespace_info
= 1;
8324 if (read_namespace_alias (die
, cu
))
8326 /* The declaration is not a global namespace alias: fall through. */
8327 case DW_TAG_imported_module
:
8328 cu
->processing_has_namespace_info
= 1;
8329 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8330 || cu
->language
!= language_fortran
))
8331 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8332 dwarf_tag_name (die
->tag
));
8333 read_import_statement (die
, cu
);
8336 case DW_TAG_imported_unit
:
8337 process_imported_unit_die (die
, cu
);
8341 new_symbol (die
, NULL
, cu
);
8345 do_cleanups (in_process
);
8348 /* DWARF name computation. */
8350 /* A helper function for dwarf2_compute_name which determines whether DIE
8351 needs to have the name of the scope prepended to the name listed in the
8355 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8357 struct attribute
*attr
;
8361 case DW_TAG_namespace
:
8362 case DW_TAG_typedef
:
8363 case DW_TAG_class_type
:
8364 case DW_TAG_interface_type
:
8365 case DW_TAG_structure_type
:
8366 case DW_TAG_union_type
:
8367 case DW_TAG_enumeration_type
:
8368 case DW_TAG_enumerator
:
8369 case DW_TAG_subprogram
:
8370 case DW_TAG_inlined_subroutine
:
8372 case DW_TAG_imported_declaration
:
8375 case DW_TAG_variable
:
8376 case DW_TAG_constant
:
8377 /* We only need to prefix "globally" visible variables. These include
8378 any variable marked with DW_AT_external or any variable that
8379 lives in a namespace. [Variables in anonymous namespaces
8380 require prefixing, but they are not DW_AT_external.] */
8382 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8384 struct dwarf2_cu
*spec_cu
= cu
;
8386 return die_needs_namespace (die_specification (die
, &spec_cu
),
8390 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8391 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8392 && die
->parent
->tag
!= DW_TAG_module
)
8394 /* A variable in a lexical block of some kind does not need a
8395 namespace, even though in C++ such variables may be external
8396 and have a mangled name. */
8397 if (die
->parent
->tag
== DW_TAG_lexical_block
8398 || die
->parent
->tag
== DW_TAG_try_block
8399 || die
->parent
->tag
== DW_TAG_catch_block
8400 || die
->parent
->tag
== DW_TAG_subprogram
)
8409 /* Retrieve the last character from a mem_file. */
8412 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8414 char *last_char_p
= (char *) object
;
8417 *last_char_p
= buffer
[length
- 1];
8420 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8421 compute the physname for the object, which include a method's:
8422 - formal parameters (C++/Java),
8423 - receiver type (Go),
8424 - return type (Java).
8426 The term "physname" is a bit confusing.
8427 For C++, for example, it is the demangled name.
8428 For Go, for example, it's the mangled name.
8430 For Ada, return the DIE's linkage name rather than the fully qualified
8431 name. PHYSNAME is ignored..
8433 The result is allocated on the objfile_obstack and canonicalized. */
8436 dwarf2_compute_name (const char *name
,
8437 struct die_info
*die
, struct dwarf2_cu
*cu
,
8440 struct objfile
*objfile
= cu
->objfile
;
8443 name
= dwarf2_name (die
, cu
);
8445 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8446 compute it by typename_concat inside GDB. */
8447 if (cu
->language
== language_ada
8448 || (cu
->language
== language_fortran
&& physname
))
8450 /* For Ada unit, we prefer the linkage name over the name, as
8451 the former contains the exported name, which the user expects
8452 to be able to reference. Ideally, we want the user to be able
8453 to reference this entity using either natural or linkage name,
8454 but we haven't started looking at this enhancement yet. */
8455 struct attribute
*attr
;
8457 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8459 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8460 if (attr
&& DW_STRING (attr
))
8461 return DW_STRING (attr
);
8464 /* These are the only languages we know how to qualify names in. */
8466 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8467 || cu
->language
== language_fortran
|| cu
->language
== language_d
))
8469 if (die_needs_namespace (die
, cu
))
8473 struct ui_file
*buf
;
8474 char *intermediate_name
;
8475 const char *canonical_name
= NULL
;
8477 prefix
= determine_prefix (die
, cu
);
8478 buf
= mem_fileopen ();
8479 if (*prefix
!= '\0')
8481 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8484 fputs_unfiltered (prefixed_name
, buf
);
8485 xfree (prefixed_name
);
8488 fputs_unfiltered (name
, buf
);
8490 /* Template parameters may be specified in the DIE's DW_AT_name, or
8491 as children with DW_TAG_template_type_param or
8492 DW_TAG_value_type_param. If the latter, add them to the name
8493 here. If the name already has template parameters, then
8494 skip this step; some versions of GCC emit both, and
8495 it is more efficient to use the pre-computed name.
8497 Something to keep in mind about this process: it is very
8498 unlikely, or in some cases downright impossible, to produce
8499 something that will match the mangled name of a function.
8500 If the definition of the function has the same debug info,
8501 we should be able to match up with it anyway. But fallbacks
8502 using the minimal symbol, for instance to find a method
8503 implemented in a stripped copy of libstdc++, will not work.
8504 If we do not have debug info for the definition, we will have to
8505 match them up some other way.
8507 When we do name matching there is a related problem with function
8508 templates; two instantiated function templates are allowed to
8509 differ only by their return types, which we do not add here. */
8511 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8513 struct attribute
*attr
;
8514 struct die_info
*child
;
8517 die
->building_fullname
= 1;
8519 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8523 const gdb_byte
*bytes
;
8524 struct dwarf2_locexpr_baton
*baton
;
8527 if (child
->tag
!= DW_TAG_template_type_param
8528 && child
->tag
!= DW_TAG_template_value_param
)
8533 fputs_unfiltered ("<", buf
);
8537 fputs_unfiltered (", ", buf
);
8539 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8542 complaint (&symfile_complaints
,
8543 _("template parameter missing DW_AT_type"));
8544 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8547 type
= die_type (child
, cu
);
8549 if (child
->tag
== DW_TAG_template_type_param
)
8551 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8555 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8558 complaint (&symfile_complaints
,
8559 _("template parameter missing "
8560 "DW_AT_const_value"));
8561 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8565 dwarf2_const_value_attr (attr
, type
, name
,
8566 &cu
->comp_unit_obstack
, cu
,
8567 &value
, &bytes
, &baton
);
8569 if (TYPE_NOSIGN (type
))
8570 /* GDB prints characters as NUMBER 'CHAR'. If that's
8571 changed, this can use value_print instead. */
8572 c_printchar (value
, type
, buf
);
8575 struct value_print_options opts
;
8578 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8582 else if (bytes
!= NULL
)
8584 v
= allocate_value (type
);
8585 memcpy (value_contents_writeable (v
), bytes
,
8586 TYPE_LENGTH (type
));
8589 v
= value_from_longest (type
, value
);
8591 /* Specify decimal so that we do not depend on
8593 get_formatted_print_options (&opts
, 'd');
8595 value_print (v
, buf
, &opts
);
8601 die
->building_fullname
= 0;
8605 /* Close the argument list, with a space if necessary
8606 (nested templates). */
8607 char last_char
= '\0';
8608 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8609 if (last_char
== '>')
8610 fputs_unfiltered (" >", buf
);
8612 fputs_unfiltered (">", buf
);
8616 /* For Java and C++ methods, append formal parameter type
8617 information, if PHYSNAME. */
8619 if (physname
&& die
->tag
== DW_TAG_subprogram
8620 && (cu
->language
== language_cplus
8621 || cu
->language
== language_java
))
8623 struct type
*type
= read_type_die (die
, cu
);
8625 c_type_print_args (type
, buf
, 1, cu
->language
,
8626 &type_print_raw_options
);
8628 if (cu
->language
== language_java
)
8630 /* For java, we must append the return type to method
8632 if (die
->tag
== DW_TAG_subprogram
)
8633 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8634 0, 0, &type_print_raw_options
);
8636 else if (cu
->language
== language_cplus
)
8638 /* Assume that an artificial first parameter is
8639 "this", but do not crash if it is not. RealView
8640 marks unnamed (and thus unused) parameters as
8641 artificial; there is no way to differentiate
8643 if (TYPE_NFIELDS (type
) > 0
8644 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8645 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8646 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8648 fputs_unfiltered (" const", buf
);
8652 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8653 ui_file_delete (buf
);
8655 if (cu
->language
== language_cplus
)
8657 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8658 &objfile
->per_bfd
->storage_obstack
);
8660 /* If we only computed INTERMEDIATE_NAME, or if
8661 INTERMEDIATE_NAME is already canonical, then we need to
8662 copy it to the appropriate obstack. */
8663 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8664 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8666 strlen (intermediate_name
));
8668 name
= canonical_name
;
8670 xfree (intermediate_name
);
8677 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8678 If scope qualifiers are appropriate they will be added. The result
8679 will be allocated on the storage_obstack, or NULL if the DIE does
8680 not have a name. NAME may either be from a previous call to
8681 dwarf2_name or NULL.
8683 The output string will be canonicalized (if C++/Java). */
8686 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8688 return dwarf2_compute_name (name
, die
, cu
, 0);
8691 /* Construct a physname for the given DIE in CU. NAME may either be
8692 from a previous call to dwarf2_name or NULL. The result will be
8693 allocated on the objfile_objstack or NULL if the DIE does not have a
8696 The output string will be canonicalized (if C++/Java). */
8699 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8701 struct objfile
*objfile
= cu
->objfile
;
8702 struct attribute
*attr
;
8703 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8704 struct cleanup
*back_to
;
8707 /* In this case dwarf2_compute_name is just a shortcut not building anything
8709 if (!die_needs_namespace (die
, cu
))
8710 return dwarf2_compute_name (name
, die
, cu
, 1);
8712 back_to
= make_cleanup (null_cleanup
, NULL
);
8714 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8716 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8718 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8720 if (attr
&& DW_STRING (attr
))
8724 mangled
= DW_STRING (attr
);
8726 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8727 type. It is easier for GDB users to search for such functions as
8728 `name(params)' than `long name(params)'. In such case the minimal
8729 symbol names do not match the full symbol names but for template
8730 functions there is never a need to look up their definition from their
8731 declaration so the only disadvantage remains the minimal symbol
8732 variant `long name(params)' does not have the proper inferior type.
8735 if (cu
->language
== language_go
)
8737 /* This is a lie, but we already lie to the caller new_symbol_full.
8738 new_symbol_full assumes we return the mangled name.
8739 This just undoes that lie until things are cleaned up. */
8744 demangled
= gdb_demangle (mangled
,
8745 (DMGL_PARAMS
| DMGL_ANSI
8746 | (cu
->language
== language_java
8747 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8752 make_cleanup (xfree
, demangled
);
8762 if (canon
== NULL
|| check_physname
)
8764 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8766 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8768 /* It may not mean a bug in GDB. The compiler could also
8769 compute DW_AT_linkage_name incorrectly. But in such case
8770 GDB would need to be bug-to-bug compatible. */
8772 complaint (&symfile_complaints
,
8773 _("Computed physname <%s> does not match demangled <%s> "
8774 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8775 physname
, canon
, mangled
, die
->offset
.sect_off
,
8776 objfile_name (objfile
));
8778 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8779 is available here - over computed PHYSNAME. It is safer
8780 against both buggy GDB and buggy compilers. */
8794 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8795 retval
, strlen (retval
));
8797 do_cleanups (back_to
);
8801 /* Inspect DIE in CU for a namespace alias. If one exists, record
8802 a new symbol for it.
8804 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8807 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8809 struct attribute
*attr
;
8811 /* If the die does not have a name, this is not a namespace
8813 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8817 struct die_info
*d
= die
;
8818 struct dwarf2_cu
*imported_cu
= cu
;
8820 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8821 keep inspecting DIEs until we hit the underlying import. */
8822 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8823 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8825 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8829 d
= follow_die_ref (d
, attr
, &imported_cu
);
8830 if (d
->tag
!= DW_TAG_imported_declaration
)
8834 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8836 complaint (&symfile_complaints
,
8837 _("DIE at 0x%x has too many recursively imported "
8838 "declarations"), d
->offset
.sect_off
);
8845 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8847 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8848 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8850 /* This declaration is a global namespace alias. Add
8851 a symbol for it whose type is the aliased namespace. */
8852 new_symbol (die
, type
, cu
);
8861 /* Return the using directives repository (global or local?) to use in the
8862 current context for LANGUAGE.
8864 For Ada, imported declarations can materialize renamings, which *may* be
8865 global. However it is impossible (for now?) in DWARF to distinguish
8866 "external" imported declarations and "static" ones. As all imported
8867 declarations seem to be static in all other languages, make them all CU-wide
8868 global only in Ada. */
8870 static struct using_direct
**
8871 using_directives (enum language language
)
8873 if (language
== language_ada
&& context_stack_depth
== 0)
8874 return &global_using_directives
;
8876 return &local_using_directives
;
8879 /* Read the import statement specified by the given die and record it. */
8882 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8884 struct objfile
*objfile
= cu
->objfile
;
8885 struct attribute
*import_attr
;
8886 struct die_info
*imported_die
, *child_die
;
8887 struct dwarf2_cu
*imported_cu
;
8888 const char *imported_name
;
8889 const char *imported_name_prefix
;
8890 const char *canonical_name
;
8891 const char *import_alias
;
8892 const char *imported_declaration
= NULL
;
8893 const char *import_prefix
;
8894 VEC (const_char_ptr
) *excludes
= NULL
;
8895 struct cleanup
*cleanups
;
8897 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8898 if (import_attr
== NULL
)
8900 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8901 dwarf_tag_name (die
->tag
));
8906 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8907 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8908 if (imported_name
== NULL
)
8910 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8912 The import in the following code:
8926 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8927 <52> DW_AT_decl_file : 1
8928 <53> DW_AT_decl_line : 6
8929 <54> DW_AT_import : <0x75>
8930 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8932 <5b> DW_AT_decl_file : 1
8933 <5c> DW_AT_decl_line : 2
8934 <5d> DW_AT_type : <0x6e>
8936 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8937 <76> DW_AT_byte_size : 4
8938 <77> DW_AT_encoding : 5 (signed)
8940 imports the wrong die ( 0x75 instead of 0x58 ).
8941 This case will be ignored until the gcc bug is fixed. */
8945 /* Figure out the local name after import. */
8946 import_alias
= dwarf2_name (die
, cu
);
8948 /* Figure out where the statement is being imported to. */
8949 import_prefix
= determine_prefix (die
, cu
);
8951 /* Figure out what the scope of the imported die is and prepend it
8952 to the name of the imported die. */
8953 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8955 if (imported_die
->tag
!= DW_TAG_namespace
8956 && imported_die
->tag
!= DW_TAG_module
)
8958 imported_declaration
= imported_name
;
8959 canonical_name
= imported_name_prefix
;
8961 else if (strlen (imported_name_prefix
) > 0)
8962 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8963 imported_name_prefix
,
8964 (cu
->language
== language_d
? "." : "::"),
8965 imported_name
, (char *) NULL
);
8967 canonical_name
= imported_name
;
8969 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8971 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8972 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8973 child_die
= sibling_die (child_die
))
8975 /* DWARF-4: A Fortran use statement with a “rename list” may be
8976 represented by an imported module entry with an import attribute
8977 referring to the module and owned entries corresponding to those
8978 entities that are renamed as part of being imported. */
8980 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8982 complaint (&symfile_complaints
,
8983 _("child DW_TAG_imported_declaration expected "
8984 "- DIE at 0x%x [in module %s]"),
8985 child_die
->offset
.sect_off
, objfile_name (objfile
));
8989 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8990 if (import_attr
== NULL
)
8992 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8993 dwarf_tag_name (child_die
->tag
));
8998 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9000 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9001 if (imported_name
== NULL
)
9003 complaint (&symfile_complaints
,
9004 _("child DW_TAG_imported_declaration has unknown "
9005 "imported name - DIE at 0x%x [in module %s]"),
9006 child_die
->offset
.sect_off
, objfile_name (objfile
));
9010 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9012 process_die (child_die
, cu
);
9015 add_using_directive (using_directives (cu
->language
),
9019 imported_declaration
,
9022 &objfile
->objfile_obstack
);
9024 do_cleanups (cleanups
);
9027 /* Cleanup function for handle_DW_AT_stmt_list. */
9030 free_cu_line_header (void *arg
)
9032 struct dwarf2_cu
*cu
= arg
;
9034 free_line_header (cu
->line_header
);
9035 cu
->line_header
= NULL
;
9038 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9039 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9040 this, it was first present in GCC release 4.3.0. */
9043 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9045 if (!cu
->checked_producer
)
9046 check_producer (cu
);
9048 return cu
->producer_is_gcc_lt_4_3
;
9052 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9053 const char **name
, const char **comp_dir
)
9055 struct attribute
*attr
;
9060 /* Find the filename. Do not use dwarf2_name here, since the filename
9061 is not a source language identifier. */
9062 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9065 *name
= DW_STRING (attr
);
9068 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9070 *comp_dir
= DW_STRING (attr
);
9071 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9072 && IS_ABSOLUTE_PATH (*name
))
9074 char *d
= ldirname (*name
);
9078 make_cleanup (xfree
, d
);
9080 if (*comp_dir
!= NULL
)
9082 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9083 directory, get rid of it. */
9084 char *cp
= strchr (*comp_dir
, ':');
9086 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9091 *name
= "<unknown>";
9094 /* Handle DW_AT_stmt_list for a compilation unit.
9095 DIE is the DW_TAG_compile_unit die for CU.
9096 COMP_DIR is the compilation directory. LOWPC is passed to
9097 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9100 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9101 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9104 struct attribute
*attr
;
9105 unsigned int line_offset
;
9106 struct line_header line_header_local
;
9107 hashval_t line_header_local_hash
;
9112 gdb_assert (! cu
->per_cu
->is_debug_types
);
9114 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9118 line_offset
= DW_UNSND (attr
);
9120 /* The line header hash table is only created if needed (it exists to
9121 prevent redundant reading of the line table for partial_units).
9122 If we're given a partial_unit, we'll need it. If we're given a
9123 compile_unit, then use the line header hash table if it's already
9124 created, but don't create one just yet. */
9126 if (dwarf2_per_objfile
->line_header_hash
== NULL
9127 && die
->tag
== DW_TAG_partial_unit
)
9129 dwarf2_per_objfile
->line_header_hash
9130 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9131 line_header_eq_voidp
,
9132 free_line_header_voidp
,
9133 &objfile
->objfile_obstack
,
9134 hashtab_obstack_allocate
,
9135 dummy_obstack_deallocate
);
9138 line_header_local
.offset
.sect_off
= line_offset
;
9139 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9140 line_header_local_hash
= line_header_hash (&line_header_local
);
9141 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9143 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9145 line_header_local_hash
, NO_INSERT
);
9147 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9148 is not present in *SLOT (since if there is something in *SLOT then
9149 it will be for a partial_unit). */
9150 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9152 gdb_assert (*slot
!= NULL
);
9153 cu
->line_header
= *slot
;
9158 /* dwarf_decode_line_header does not yet provide sufficient information.
9159 We always have to call also dwarf_decode_lines for it. */
9160 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9161 if (cu
->line_header
== NULL
)
9164 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9168 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9170 line_header_local_hash
, INSERT
);
9171 gdb_assert (slot
!= NULL
);
9173 if (slot
!= NULL
&& *slot
== NULL
)
9175 /* This newly decoded line number information unit will be owned
9176 by line_header_hash hash table. */
9177 *slot
= cu
->line_header
;
9181 /* We cannot free any current entry in (*slot) as that struct line_header
9182 may be already used by multiple CUs. Create only temporary decoded
9183 line_header for this CU - it may happen at most once for each line
9184 number information unit. And if we're not using line_header_hash
9185 then this is what we want as well. */
9186 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9187 make_cleanup (free_cu_line_header
, cu
);
9189 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9190 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9194 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9197 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9199 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9201 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9202 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9203 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9204 struct attribute
*attr
;
9205 const char *name
= NULL
;
9206 const char *comp_dir
= NULL
;
9207 struct die_info
*child_die
;
9208 bfd
*abfd
= objfile
->obfd
;
9211 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9213 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9215 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9216 from finish_block. */
9217 if (lowpc
== ((CORE_ADDR
) -1))
9219 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9221 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9223 prepare_one_comp_unit (cu
, die
, cu
->language
);
9225 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9226 standardised yet. As a workaround for the language detection we fall
9227 back to the DW_AT_producer string. */
9228 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9229 cu
->language
= language_opencl
;
9231 /* Similar hack for Go. */
9232 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9233 set_cu_language (DW_LANG_Go
, cu
);
9235 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9237 /* Decode line number information if present. We do this before
9238 processing child DIEs, so that the line header table is available
9239 for DW_AT_decl_file. */
9240 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9242 /* Process all dies in compilation unit. */
9243 if (die
->child
!= NULL
)
9245 child_die
= die
->child
;
9246 while (child_die
&& child_die
->tag
)
9248 process_die (child_die
, cu
);
9249 child_die
= sibling_die (child_die
);
9253 /* Decode macro information, if present. Dwarf 2 macro information
9254 refers to information in the line number info statement program
9255 header, so we can only read it if we've read the header
9257 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9258 if (attr
&& cu
->line_header
)
9260 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9261 complaint (&symfile_complaints
,
9262 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9264 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9268 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9269 if (attr
&& cu
->line_header
)
9271 unsigned int macro_offset
= DW_UNSND (attr
);
9273 dwarf_decode_macros (cu
, macro_offset
, 0);
9277 do_cleanups (back_to
);
9280 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9281 Create the set of symtabs used by this TU, or if this TU is sharing
9282 symtabs with another TU and the symtabs have already been created
9283 then restore those symtabs in the line header.
9284 We don't need the pc/line-number mapping for type units. */
9287 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9289 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9290 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9291 struct type_unit_group
*tu_group
;
9293 struct line_header
*lh
;
9294 struct attribute
*attr
;
9295 unsigned int i
, line_offset
;
9296 struct signatured_type
*sig_type
;
9298 gdb_assert (per_cu
->is_debug_types
);
9299 sig_type
= (struct signatured_type
*) per_cu
;
9301 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9303 /* If we're using .gdb_index (includes -readnow) then
9304 per_cu->type_unit_group may not have been set up yet. */
9305 if (sig_type
->type_unit_group
== NULL
)
9306 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9307 tu_group
= sig_type
->type_unit_group
;
9309 /* If we've already processed this stmt_list there's no real need to
9310 do it again, we could fake it and just recreate the part we need
9311 (file name,index -> symtab mapping). If data shows this optimization
9312 is useful we can do it then. */
9313 first_time
= tu_group
->compunit_symtab
== NULL
;
9315 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9320 line_offset
= DW_UNSND (attr
);
9321 lh
= dwarf_decode_line_header (line_offset
, cu
);
9326 dwarf2_start_symtab (cu
, "", NULL
, 0);
9329 gdb_assert (tu_group
->symtabs
== NULL
);
9330 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9335 cu
->line_header
= lh
;
9336 make_cleanup (free_cu_line_header
, cu
);
9340 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9342 tu_group
->num_symtabs
= lh
->num_file_names
;
9343 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9345 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9347 const char *dir
= NULL
;
9348 struct file_entry
*fe
= &lh
->file_names
[i
];
9350 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9351 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9352 dwarf2_start_subfile (fe
->name
, dir
);
9354 if (current_subfile
->symtab
== NULL
)
9356 /* NOTE: start_subfile will recognize when it's been passed
9357 a file it has already seen. So we can't assume there's a
9358 simple mapping from lh->file_names to subfiles, plus
9359 lh->file_names may contain dups. */
9360 current_subfile
->symtab
9361 = allocate_symtab (cust
, current_subfile
->name
);
9364 fe
->symtab
= current_subfile
->symtab
;
9365 tu_group
->symtabs
[i
] = fe
->symtab
;
9370 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9372 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9374 struct file_entry
*fe
= &lh
->file_names
[i
];
9376 fe
->symtab
= tu_group
->symtabs
[i
];
9380 /* The main symtab is allocated last. Type units don't have DW_AT_name
9381 so they don't have a "real" (so to speak) symtab anyway.
9382 There is later code that will assign the main symtab to all symbols
9383 that don't have one. We need to handle the case of a symbol with a
9384 missing symtab (DW_AT_decl_file) anyway. */
9387 /* Process DW_TAG_type_unit.
9388 For TUs we want to skip the first top level sibling if it's not the
9389 actual type being defined by this TU. In this case the first top
9390 level sibling is there to provide context only. */
9393 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9395 struct die_info
*child_die
;
9397 prepare_one_comp_unit (cu
, die
, language_minimal
);
9399 /* Initialize (or reinitialize) the machinery for building symtabs.
9400 We do this before processing child DIEs, so that the line header table
9401 is available for DW_AT_decl_file. */
9402 setup_type_unit_groups (die
, cu
);
9404 if (die
->child
!= NULL
)
9406 child_die
= die
->child
;
9407 while (child_die
&& child_die
->tag
)
9409 process_die (child_die
, cu
);
9410 child_die
= sibling_die (child_die
);
9417 http://gcc.gnu.org/wiki/DebugFission
9418 http://gcc.gnu.org/wiki/DebugFissionDWP
9420 To simplify handling of both DWO files ("object" files with the DWARF info)
9421 and DWP files (a file with the DWOs packaged up into one file), we treat
9422 DWP files as having a collection of virtual DWO files. */
9425 hash_dwo_file (const void *item
)
9427 const struct dwo_file
*dwo_file
= item
;
9430 hash
= htab_hash_string (dwo_file
->dwo_name
);
9431 if (dwo_file
->comp_dir
!= NULL
)
9432 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9437 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9439 const struct dwo_file
*lhs
= item_lhs
;
9440 const struct dwo_file
*rhs
= item_rhs
;
9442 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9444 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9445 return lhs
->comp_dir
== rhs
->comp_dir
;
9446 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9449 /* Allocate a hash table for DWO files. */
9452 allocate_dwo_file_hash_table (void)
9454 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9456 return htab_create_alloc_ex (41,
9460 &objfile
->objfile_obstack
,
9461 hashtab_obstack_allocate
,
9462 dummy_obstack_deallocate
);
9465 /* Lookup DWO file DWO_NAME. */
9468 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9470 struct dwo_file find_entry
;
9473 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9474 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9476 memset (&find_entry
, 0, sizeof (find_entry
));
9477 find_entry
.dwo_name
= dwo_name
;
9478 find_entry
.comp_dir
= comp_dir
;
9479 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9485 hash_dwo_unit (const void *item
)
9487 const struct dwo_unit
*dwo_unit
= item
;
9489 /* This drops the top 32 bits of the id, but is ok for a hash. */
9490 return dwo_unit
->signature
;
9494 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9496 const struct dwo_unit
*lhs
= item_lhs
;
9497 const struct dwo_unit
*rhs
= item_rhs
;
9499 /* The signature is assumed to be unique within the DWO file.
9500 So while object file CU dwo_id's always have the value zero,
9501 that's OK, assuming each object file DWO file has only one CU,
9502 and that's the rule for now. */
9503 return lhs
->signature
== rhs
->signature
;
9506 /* Allocate a hash table for DWO CUs,TUs.
9507 There is one of these tables for each of CUs,TUs for each DWO file. */
9510 allocate_dwo_unit_table (struct objfile
*objfile
)
9512 /* Start out with a pretty small number.
9513 Generally DWO files contain only one CU and maybe some TUs. */
9514 return htab_create_alloc_ex (3,
9518 &objfile
->objfile_obstack
,
9519 hashtab_obstack_allocate
,
9520 dummy_obstack_deallocate
);
9523 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9525 struct create_dwo_cu_data
9527 struct dwo_file
*dwo_file
;
9528 struct dwo_unit dwo_unit
;
9531 /* die_reader_func for create_dwo_cu. */
9534 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9535 const gdb_byte
*info_ptr
,
9536 struct die_info
*comp_unit_die
,
9540 struct dwarf2_cu
*cu
= reader
->cu
;
9541 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9542 sect_offset offset
= cu
->per_cu
->offset
;
9543 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9544 struct create_dwo_cu_data
*data
= datap
;
9545 struct dwo_file
*dwo_file
= data
->dwo_file
;
9546 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9547 struct attribute
*attr
;
9549 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9552 complaint (&symfile_complaints
,
9553 _("Dwarf Error: debug entry at offset 0x%x is missing"
9554 " its dwo_id [in module %s]"),
9555 offset
.sect_off
, dwo_file
->dwo_name
);
9559 dwo_unit
->dwo_file
= dwo_file
;
9560 dwo_unit
->signature
= DW_UNSND (attr
);
9561 dwo_unit
->section
= section
;
9562 dwo_unit
->offset
= offset
;
9563 dwo_unit
->length
= cu
->per_cu
->length
;
9565 if (dwarf_read_debug
)
9566 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9567 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9570 /* Create the dwo_unit for the lone CU in DWO_FILE.
9571 Note: This function processes DWO files only, not DWP files. */
9573 static struct dwo_unit
*
9574 create_dwo_cu (struct dwo_file
*dwo_file
)
9576 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9577 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9580 const gdb_byte
*info_ptr
, *end_ptr
;
9581 struct create_dwo_cu_data create_dwo_cu_data
;
9582 struct dwo_unit
*dwo_unit
;
9584 dwarf2_read_section (objfile
, section
);
9585 info_ptr
= section
->buffer
;
9587 if (info_ptr
== NULL
)
9590 /* We can't set abfd until now because the section may be empty or
9591 not present, in which case section->asection will be NULL. */
9592 abfd
= get_section_bfd_owner (section
);
9594 if (dwarf_read_debug
)
9596 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9597 get_section_name (section
),
9598 get_section_file_name (section
));
9601 create_dwo_cu_data
.dwo_file
= dwo_file
;
9604 end_ptr
= info_ptr
+ section
->size
;
9605 while (info_ptr
< end_ptr
)
9607 struct dwarf2_per_cu_data per_cu
;
9609 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9610 sizeof (create_dwo_cu_data
.dwo_unit
));
9611 memset (&per_cu
, 0, sizeof (per_cu
));
9612 per_cu
.objfile
= objfile
;
9613 per_cu
.is_debug_types
= 0;
9614 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9615 per_cu
.section
= section
;
9617 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9618 create_dwo_cu_reader
,
9619 &create_dwo_cu_data
);
9621 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9623 /* If we've already found one, complain. We only support one
9624 because having more than one requires hacking the dwo_name of
9625 each to match, which is highly unlikely to happen. */
9626 if (dwo_unit
!= NULL
)
9628 complaint (&symfile_complaints
,
9629 _("Multiple CUs in DWO file %s [in module %s]"),
9630 dwo_file
->dwo_name
, objfile_name (objfile
));
9634 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9635 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9638 info_ptr
+= per_cu
.length
;
9644 /* DWP file .debug_{cu,tu}_index section format:
9645 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9649 Both index sections have the same format, and serve to map a 64-bit
9650 signature to a set of section numbers. Each section begins with a header,
9651 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9652 indexes, and a pool of 32-bit section numbers. The index sections will be
9653 aligned at 8-byte boundaries in the file.
9655 The index section header consists of:
9657 V, 32 bit version number
9659 N, 32 bit number of compilation units or type units in the index
9660 M, 32 bit number of slots in the hash table
9662 Numbers are recorded using the byte order of the application binary.
9664 The hash table begins at offset 16 in the section, and consists of an array
9665 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9666 order of the application binary). Unused slots in the hash table are 0.
9667 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9669 The parallel table begins immediately after the hash table
9670 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9671 array of 32-bit indexes (using the byte order of the application binary),
9672 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9673 table contains a 32-bit index into the pool of section numbers. For unused
9674 hash table slots, the corresponding entry in the parallel table will be 0.
9676 The pool of section numbers begins immediately following the hash table
9677 (at offset 16 + 12 * M from the beginning of the section). The pool of
9678 section numbers consists of an array of 32-bit words (using the byte order
9679 of the application binary). Each item in the array is indexed starting
9680 from 0. The hash table entry provides the index of the first section
9681 number in the set. Additional section numbers in the set follow, and the
9682 set is terminated by a 0 entry (section number 0 is not used in ELF).
9684 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9685 section must be the first entry in the set, and the .debug_abbrev.dwo must
9686 be the second entry. Other members of the set may follow in any order.
9692 DWP Version 2 combines all the .debug_info, etc. sections into one,
9693 and the entries in the index tables are now offsets into these sections.
9694 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9697 Index Section Contents:
9699 Hash Table of Signatures dwp_hash_table.hash_table
9700 Parallel Table of Indices dwp_hash_table.unit_table
9701 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9702 Table of Section Sizes dwp_hash_table.v2.sizes
9704 The index section header consists of:
9706 V, 32 bit version number
9707 L, 32 bit number of columns in the table of section offsets
9708 N, 32 bit number of compilation units or type units in the index
9709 M, 32 bit number of slots in the hash table
9711 Numbers are recorded using the byte order of the application binary.
9713 The hash table has the same format as version 1.
9714 The parallel table of indices has the same format as version 1,
9715 except that the entries are origin-1 indices into the table of sections
9716 offsets and the table of section sizes.
9718 The table of offsets begins immediately following the parallel table
9719 (at offset 16 + 12 * M from the beginning of the section). The table is
9720 a two-dimensional array of 32-bit words (using the byte order of the
9721 application binary), with L columns and N+1 rows, in row-major order.
9722 Each row in the array is indexed starting from 0. The first row provides
9723 a key to the remaining rows: each column in this row provides an identifier
9724 for a debug section, and the offsets in the same column of subsequent rows
9725 refer to that section. The section identifiers are:
9727 DW_SECT_INFO 1 .debug_info.dwo
9728 DW_SECT_TYPES 2 .debug_types.dwo
9729 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9730 DW_SECT_LINE 4 .debug_line.dwo
9731 DW_SECT_LOC 5 .debug_loc.dwo
9732 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9733 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9734 DW_SECT_MACRO 8 .debug_macro.dwo
9736 The offsets provided by the CU and TU index sections are the base offsets
9737 for the contributions made by each CU or TU to the corresponding section
9738 in the package file. Each CU and TU header contains an abbrev_offset
9739 field, used to find the abbreviations table for that CU or TU within the
9740 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9741 be interpreted as relative to the base offset given in the index section.
9742 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9743 should be interpreted as relative to the base offset for .debug_line.dwo,
9744 and offsets into other debug sections obtained from DWARF attributes should
9745 also be interpreted as relative to the corresponding base offset.
9747 The table of sizes begins immediately following the table of offsets.
9748 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9749 with L columns and N rows, in row-major order. Each row in the array is
9750 indexed starting from 1 (row 0 is shared by the two tables).
9754 Hash table lookup is handled the same in version 1 and 2:
9756 We assume that N and M will not exceed 2^32 - 1.
9757 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9759 Given a 64-bit compilation unit signature or a type signature S, an entry
9760 in the hash table is located as follows:
9762 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9763 the low-order k bits all set to 1.
9765 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9767 3) If the hash table entry at index H matches the signature, use that
9768 entry. If the hash table entry at index H is unused (all zeroes),
9769 terminate the search: the signature is not present in the table.
9771 4) Let H = (H + H') modulo M. Repeat at Step 3.
9773 Because M > N and H' and M are relatively prime, the search is guaranteed
9774 to stop at an unused slot or find the match. */
9776 /* Create a hash table to map DWO IDs to their CU/TU entry in
9777 .debug_{info,types}.dwo in DWP_FILE.
9778 Returns NULL if there isn't one.
9779 Note: This function processes DWP files only, not DWO files. */
9781 static struct dwp_hash_table
*
9782 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9785 bfd
*dbfd
= dwp_file
->dbfd
;
9786 const gdb_byte
*index_ptr
, *index_end
;
9787 struct dwarf2_section_info
*index
;
9788 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9789 struct dwp_hash_table
*htab
;
9792 index
= &dwp_file
->sections
.tu_index
;
9794 index
= &dwp_file
->sections
.cu_index
;
9796 if (dwarf2_section_empty_p (index
))
9798 dwarf2_read_section (objfile
, index
);
9800 index_ptr
= index
->buffer
;
9801 index_end
= index_ptr
+ index
->size
;
9803 version
= read_4_bytes (dbfd
, index_ptr
);
9806 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9810 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9812 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9815 if (version
!= 1 && version
!= 2)
9817 error (_("Dwarf Error: unsupported DWP file version (%s)"
9819 pulongest (version
), dwp_file
->name
);
9821 if (nr_slots
!= (nr_slots
& -nr_slots
))
9823 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9824 " is not power of 2 [in module %s]"),
9825 pulongest (nr_slots
), dwp_file
->name
);
9828 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9829 htab
->version
= version
;
9830 htab
->nr_columns
= nr_columns
;
9831 htab
->nr_units
= nr_units
;
9832 htab
->nr_slots
= nr_slots
;
9833 htab
->hash_table
= index_ptr
;
9834 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9836 /* Exit early if the table is empty. */
9837 if (nr_slots
== 0 || nr_units
== 0
9838 || (version
== 2 && nr_columns
== 0))
9840 /* All must be zero. */
9841 if (nr_slots
!= 0 || nr_units
!= 0
9842 || (version
== 2 && nr_columns
!= 0))
9844 complaint (&symfile_complaints
,
9845 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9846 " all zero [in modules %s]"),
9854 htab
->section_pool
.v1
.indices
=
9855 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9856 /* It's harder to decide whether the section is too small in v1.
9857 V1 is deprecated anyway so we punt. */
9861 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9862 int *ids
= htab
->section_pool
.v2
.section_ids
;
9863 /* Reverse map for error checking. */
9864 int ids_seen
[DW_SECT_MAX
+ 1];
9869 error (_("Dwarf Error: bad DWP hash table, too few columns"
9870 " in section table [in module %s]"),
9873 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9875 error (_("Dwarf Error: bad DWP hash table, too many columns"
9876 " in section table [in module %s]"),
9879 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9880 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9881 for (i
= 0; i
< nr_columns
; ++i
)
9883 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9885 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9887 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9888 " in section table [in module %s]"),
9889 id
, dwp_file
->name
);
9891 if (ids_seen
[id
] != -1)
9893 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9894 " id %d in section table [in module %s]"),
9895 id
, dwp_file
->name
);
9900 /* Must have exactly one info or types section. */
9901 if (((ids_seen
[DW_SECT_INFO
] != -1)
9902 + (ids_seen
[DW_SECT_TYPES
] != -1))
9905 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9906 " DWO info/types section [in module %s]"),
9909 /* Must have an abbrev section. */
9910 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9912 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9913 " section [in module %s]"),
9916 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9917 htab
->section_pool
.v2
.sizes
=
9918 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9919 * nr_units
* nr_columns
);
9920 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9921 * nr_units
* nr_columns
))
9924 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9933 /* Update SECTIONS with the data from SECTP.
9935 This function is like the other "locate" section routines that are
9936 passed to bfd_map_over_sections, but in this context the sections to
9937 read comes from the DWP V1 hash table, not the full ELF section table.
9939 The result is non-zero for success, or zero if an error was found. */
9942 locate_v1_virtual_dwo_sections (asection
*sectp
,
9943 struct virtual_v1_dwo_sections
*sections
)
9945 const struct dwop_section_names
*names
= &dwop_section_names
;
9947 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9949 /* There can be only one. */
9950 if (sections
->abbrev
.s
.asection
!= NULL
)
9952 sections
->abbrev
.s
.asection
= sectp
;
9953 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9955 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9956 || section_is_p (sectp
->name
, &names
->types_dwo
))
9958 /* There can be only one. */
9959 if (sections
->info_or_types
.s
.asection
!= NULL
)
9961 sections
->info_or_types
.s
.asection
= sectp
;
9962 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9964 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9966 /* There can be only one. */
9967 if (sections
->line
.s
.asection
!= NULL
)
9969 sections
->line
.s
.asection
= sectp
;
9970 sections
->line
.size
= bfd_get_section_size (sectp
);
9972 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9974 /* There can be only one. */
9975 if (sections
->loc
.s
.asection
!= NULL
)
9977 sections
->loc
.s
.asection
= sectp
;
9978 sections
->loc
.size
= bfd_get_section_size (sectp
);
9980 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9982 /* There can be only one. */
9983 if (sections
->macinfo
.s
.asection
!= NULL
)
9985 sections
->macinfo
.s
.asection
= sectp
;
9986 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9988 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9990 /* There can be only one. */
9991 if (sections
->macro
.s
.asection
!= NULL
)
9993 sections
->macro
.s
.asection
= sectp
;
9994 sections
->macro
.size
= bfd_get_section_size (sectp
);
9996 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9998 /* There can be only one. */
9999 if (sections
->str_offsets
.s
.asection
!= NULL
)
10001 sections
->str_offsets
.s
.asection
= sectp
;
10002 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10006 /* No other kind of section is valid. */
10013 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10014 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10015 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10016 This is for DWP version 1 files. */
10018 static struct dwo_unit
*
10019 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10020 uint32_t unit_index
,
10021 const char *comp_dir
,
10022 ULONGEST signature
, int is_debug_types
)
10024 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10025 const struct dwp_hash_table
*dwp_htab
=
10026 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10027 bfd
*dbfd
= dwp_file
->dbfd
;
10028 const char *kind
= is_debug_types
? "TU" : "CU";
10029 struct dwo_file
*dwo_file
;
10030 struct dwo_unit
*dwo_unit
;
10031 struct virtual_v1_dwo_sections sections
;
10032 void **dwo_file_slot
;
10033 char *virtual_dwo_name
;
10034 struct dwarf2_section_info
*cutu
;
10035 struct cleanup
*cleanups
;
10038 gdb_assert (dwp_file
->version
== 1);
10040 if (dwarf_read_debug
)
10042 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10044 pulongest (unit_index
), hex_string (signature
),
10048 /* Fetch the sections of this DWO unit.
10049 Put a limit on the number of sections we look for so that bad data
10050 doesn't cause us to loop forever. */
10052 #define MAX_NR_V1_DWO_SECTIONS \
10053 (1 /* .debug_info or .debug_types */ \
10054 + 1 /* .debug_abbrev */ \
10055 + 1 /* .debug_line */ \
10056 + 1 /* .debug_loc */ \
10057 + 1 /* .debug_str_offsets */ \
10058 + 1 /* .debug_macro or .debug_macinfo */ \
10059 + 1 /* trailing zero */)
10061 memset (§ions
, 0, sizeof (sections
));
10062 cleanups
= make_cleanup (null_cleanup
, 0);
10064 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10067 uint32_t section_nr
=
10068 read_4_bytes (dbfd
,
10069 dwp_htab
->section_pool
.v1
.indices
10070 + (unit_index
+ i
) * sizeof (uint32_t));
10072 if (section_nr
== 0)
10074 if (section_nr
>= dwp_file
->num_sections
)
10076 error (_("Dwarf Error: bad DWP hash table, section number too large"
10077 " [in module %s]"),
10081 sectp
= dwp_file
->elf_sections
[section_nr
];
10082 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10084 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10085 " [in module %s]"),
10091 || dwarf2_section_empty_p (§ions
.info_or_types
)
10092 || dwarf2_section_empty_p (§ions
.abbrev
))
10094 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10095 " [in module %s]"),
10098 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10100 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10101 " [in module %s]"),
10105 /* It's easier for the rest of the code if we fake a struct dwo_file and
10106 have dwo_unit "live" in that. At least for now.
10108 The DWP file can be made up of a random collection of CUs and TUs.
10109 However, for each CU + set of TUs that came from the same original DWO
10110 file, we can combine them back into a virtual DWO file to save space
10111 (fewer struct dwo_file objects to allocate). Remember that for really
10112 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10115 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10116 get_section_id (§ions
.abbrev
),
10117 get_section_id (§ions
.line
),
10118 get_section_id (§ions
.loc
),
10119 get_section_id (§ions
.str_offsets
));
10120 make_cleanup (xfree
, virtual_dwo_name
);
10121 /* Can we use an existing virtual DWO file? */
10122 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10123 /* Create one if necessary. */
10124 if (*dwo_file_slot
== NULL
)
10126 if (dwarf_read_debug
)
10128 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10131 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10132 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10134 strlen (virtual_dwo_name
));
10135 dwo_file
->comp_dir
= comp_dir
;
10136 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10137 dwo_file
->sections
.line
= sections
.line
;
10138 dwo_file
->sections
.loc
= sections
.loc
;
10139 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10140 dwo_file
->sections
.macro
= sections
.macro
;
10141 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10142 /* The "str" section is global to the entire DWP file. */
10143 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10144 /* The info or types section is assigned below to dwo_unit,
10145 there's no need to record it in dwo_file.
10146 Also, we can't simply record type sections in dwo_file because
10147 we record a pointer into the vector in dwo_unit. As we collect more
10148 types we'll grow the vector and eventually have to reallocate space
10149 for it, invalidating all copies of pointers into the previous
10151 *dwo_file_slot
= dwo_file
;
10155 if (dwarf_read_debug
)
10157 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10160 dwo_file
= *dwo_file_slot
;
10162 do_cleanups (cleanups
);
10164 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10165 dwo_unit
->dwo_file
= dwo_file
;
10166 dwo_unit
->signature
= signature
;
10167 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10168 sizeof (struct dwarf2_section_info
));
10169 *dwo_unit
->section
= sections
.info_or_types
;
10170 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10175 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10176 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10177 piece within that section used by a TU/CU, return a virtual section
10178 of just that piece. */
10180 static struct dwarf2_section_info
10181 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10182 bfd_size_type offset
, bfd_size_type size
)
10184 struct dwarf2_section_info result
;
10187 gdb_assert (section
!= NULL
);
10188 gdb_assert (!section
->is_virtual
);
10190 memset (&result
, 0, sizeof (result
));
10191 result
.s
.containing_section
= section
;
10192 result
.is_virtual
= 1;
10197 sectp
= get_section_bfd_section (section
);
10199 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10200 bounds of the real section. This is a pretty-rare event, so just
10201 flag an error (easier) instead of a warning and trying to cope. */
10203 || offset
+ size
> bfd_get_section_size (sectp
))
10205 bfd
*abfd
= sectp
->owner
;
10207 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10208 " in section %s [in module %s]"),
10209 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10210 objfile_name (dwarf2_per_objfile
->objfile
));
10213 result
.virtual_offset
= offset
;
10214 result
.size
= size
;
10218 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10219 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10220 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10221 This is for DWP version 2 files. */
10223 static struct dwo_unit
*
10224 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10225 uint32_t unit_index
,
10226 const char *comp_dir
,
10227 ULONGEST signature
, int is_debug_types
)
10229 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10230 const struct dwp_hash_table
*dwp_htab
=
10231 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10232 bfd
*dbfd
= dwp_file
->dbfd
;
10233 const char *kind
= is_debug_types
? "TU" : "CU";
10234 struct dwo_file
*dwo_file
;
10235 struct dwo_unit
*dwo_unit
;
10236 struct virtual_v2_dwo_sections sections
;
10237 void **dwo_file_slot
;
10238 char *virtual_dwo_name
;
10239 struct dwarf2_section_info
*cutu
;
10240 struct cleanup
*cleanups
;
10243 gdb_assert (dwp_file
->version
== 2);
10245 if (dwarf_read_debug
)
10247 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10249 pulongest (unit_index
), hex_string (signature
),
10253 /* Fetch the section offsets of this DWO unit. */
10255 memset (§ions
, 0, sizeof (sections
));
10256 cleanups
= make_cleanup (null_cleanup
, 0);
10258 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10260 uint32_t offset
= read_4_bytes (dbfd
,
10261 dwp_htab
->section_pool
.v2
.offsets
10262 + (((unit_index
- 1) * dwp_htab
->nr_columns
10264 * sizeof (uint32_t)));
10265 uint32_t size
= read_4_bytes (dbfd
,
10266 dwp_htab
->section_pool
.v2
.sizes
10267 + (((unit_index
- 1) * dwp_htab
->nr_columns
10269 * sizeof (uint32_t)));
10271 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10274 case DW_SECT_TYPES
:
10275 sections
.info_or_types_offset
= offset
;
10276 sections
.info_or_types_size
= size
;
10278 case DW_SECT_ABBREV
:
10279 sections
.abbrev_offset
= offset
;
10280 sections
.abbrev_size
= size
;
10283 sections
.line_offset
= offset
;
10284 sections
.line_size
= size
;
10287 sections
.loc_offset
= offset
;
10288 sections
.loc_size
= size
;
10290 case DW_SECT_STR_OFFSETS
:
10291 sections
.str_offsets_offset
= offset
;
10292 sections
.str_offsets_size
= size
;
10294 case DW_SECT_MACINFO
:
10295 sections
.macinfo_offset
= offset
;
10296 sections
.macinfo_size
= size
;
10298 case DW_SECT_MACRO
:
10299 sections
.macro_offset
= offset
;
10300 sections
.macro_size
= size
;
10305 /* It's easier for the rest of the code if we fake a struct dwo_file and
10306 have dwo_unit "live" in that. At least for now.
10308 The DWP file can be made up of a random collection of CUs and TUs.
10309 However, for each CU + set of TUs that came from the same original DWO
10310 file, we can combine them back into a virtual DWO file to save space
10311 (fewer struct dwo_file objects to allocate). Remember that for really
10312 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10315 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10316 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10317 (long) (sections
.line_size
? sections
.line_offset
: 0),
10318 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10319 (long) (sections
.str_offsets_size
10320 ? sections
.str_offsets_offset
: 0));
10321 make_cleanup (xfree
, virtual_dwo_name
);
10322 /* Can we use an existing virtual DWO file? */
10323 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10324 /* Create one if necessary. */
10325 if (*dwo_file_slot
== NULL
)
10327 if (dwarf_read_debug
)
10329 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10332 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10333 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10335 strlen (virtual_dwo_name
));
10336 dwo_file
->comp_dir
= comp_dir
;
10337 dwo_file
->sections
.abbrev
=
10338 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10339 sections
.abbrev_offset
, sections
.abbrev_size
);
10340 dwo_file
->sections
.line
=
10341 create_dwp_v2_section (&dwp_file
->sections
.line
,
10342 sections
.line_offset
, sections
.line_size
);
10343 dwo_file
->sections
.loc
=
10344 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10345 sections
.loc_offset
, sections
.loc_size
);
10346 dwo_file
->sections
.macinfo
=
10347 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10348 sections
.macinfo_offset
, sections
.macinfo_size
);
10349 dwo_file
->sections
.macro
=
10350 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10351 sections
.macro_offset
, sections
.macro_size
);
10352 dwo_file
->sections
.str_offsets
=
10353 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10354 sections
.str_offsets_offset
,
10355 sections
.str_offsets_size
);
10356 /* The "str" section is global to the entire DWP file. */
10357 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10358 /* The info or types section is assigned below to dwo_unit,
10359 there's no need to record it in dwo_file.
10360 Also, we can't simply record type sections in dwo_file because
10361 we record a pointer into the vector in dwo_unit. As we collect more
10362 types we'll grow the vector and eventually have to reallocate space
10363 for it, invalidating all copies of pointers into the previous
10365 *dwo_file_slot
= dwo_file
;
10369 if (dwarf_read_debug
)
10371 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10374 dwo_file
= *dwo_file_slot
;
10376 do_cleanups (cleanups
);
10378 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10379 dwo_unit
->dwo_file
= dwo_file
;
10380 dwo_unit
->signature
= signature
;
10381 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10382 sizeof (struct dwarf2_section_info
));
10383 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10384 ? &dwp_file
->sections
.types
10385 : &dwp_file
->sections
.info
,
10386 sections
.info_or_types_offset
,
10387 sections
.info_or_types_size
);
10388 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10393 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10394 Returns NULL if the signature isn't found. */
10396 static struct dwo_unit
*
10397 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10398 ULONGEST signature
, int is_debug_types
)
10400 const struct dwp_hash_table
*dwp_htab
=
10401 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10402 bfd
*dbfd
= dwp_file
->dbfd
;
10403 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10404 uint32_t hash
= signature
& mask
;
10405 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10408 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10410 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10411 find_dwo_cu
.signature
= signature
;
10412 slot
= htab_find_slot (is_debug_types
10413 ? dwp_file
->loaded_tus
10414 : dwp_file
->loaded_cus
,
10415 &find_dwo_cu
, INSERT
);
10420 /* Use a for loop so that we don't loop forever on bad debug info. */
10421 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10423 ULONGEST signature_in_table
;
10425 signature_in_table
=
10426 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10427 if (signature_in_table
== signature
)
10429 uint32_t unit_index
=
10430 read_4_bytes (dbfd
,
10431 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10433 if (dwp_file
->version
== 1)
10435 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10436 comp_dir
, signature
,
10441 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10442 comp_dir
, signature
,
10447 if (signature_in_table
== 0)
10449 hash
= (hash
+ hash2
) & mask
;
10452 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10453 " [in module %s]"),
10457 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10458 Open the file specified by FILE_NAME and hand it off to BFD for
10459 preliminary analysis. Return a newly initialized bfd *, which
10460 includes a canonicalized copy of FILE_NAME.
10461 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10462 SEARCH_CWD is true if the current directory is to be searched.
10463 It will be searched before debug-file-directory.
10464 If successful, the file is added to the bfd include table of the
10465 objfile's bfd (see gdb_bfd_record_inclusion).
10466 If unable to find/open the file, return NULL.
10467 NOTE: This function is derived from symfile_bfd_open. */
10470 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10474 char *absolute_name
;
10475 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10476 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10477 to debug_file_directory. */
10479 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10483 if (*debug_file_directory
!= '\0')
10484 search_path
= concat (".", dirname_separator_string
,
10485 debug_file_directory
, NULL
);
10487 search_path
= xstrdup (".");
10490 search_path
= xstrdup (debug_file_directory
);
10492 flags
= OPF_RETURN_REALPATH
;
10494 flags
|= OPF_SEARCH_IN_PATH
;
10495 desc
= openp (search_path
, flags
, file_name
,
10496 O_RDONLY
| O_BINARY
, &absolute_name
);
10497 xfree (search_path
);
10501 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10502 xfree (absolute_name
);
10503 if (sym_bfd
== NULL
)
10505 bfd_set_cacheable (sym_bfd
, 1);
10507 if (!bfd_check_format (sym_bfd
, bfd_object
))
10509 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10513 /* Success. Record the bfd as having been included by the objfile's bfd.
10514 This is important because things like demangled_names_hash lives in the
10515 objfile's per_bfd space and may have references to things like symbol
10516 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10517 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10522 /* Try to open DWO file FILE_NAME.
10523 COMP_DIR is the DW_AT_comp_dir attribute.
10524 The result is the bfd handle of the file.
10525 If there is a problem finding or opening the file, return NULL.
10526 Upon success, the canonicalized path of the file is stored in the bfd,
10527 same as symfile_bfd_open. */
10530 open_dwo_file (const char *file_name
, const char *comp_dir
)
10534 if (IS_ABSOLUTE_PATH (file_name
))
10535 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10537 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10539 if (comp_dir
!= NULL
)
10541 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10543 /* NOTE: If comp_dir is a relative path, this will also try the
10544 search path, which seems useful. */
10545 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10546 xfree (path_to_try
);
10551 /* That didn't work, try debug-file-directory, which, despite its name,
10552 is a list of paths. */
10554 if (*debug_file_directory
== '\0')
10557 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10560 /* This function is mapped across the sections and remembers the offset and
10561 size of each of the DWO debugging sections we are interested in. */
10564 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10566 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10567 const struct dwop_section_names
*names
= &dwop_section_names
;
10569 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10571 dwo_sections
->abbrev
.s
.asection
= sectp
;
10572 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10574 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10576 dwo_sections
->info
.s
.asection
= sectp
;
10577 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10579 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10581 dwo_sections
->line
.s
.asection
= sectp
;
10582 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10584 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10586 dwo_sections
->loc
.s
.asection
= sectp
;
10587 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10589 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10591 dwo_sections
->macinfo
.s
.asection
= sectp
;
10592 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10594 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10596 dwo_sections
->macro
.s
.asection
= sectp
;
10597 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10599 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10601 dwo_sections
->str
.s
.asection
= sectp
;
10602 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10604 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10606 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10607 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10609 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10611 struct dwarf2_section_info type_section
;
10613 memset (&type_section
, 0, sizeof (type_section
));
10614 type_section
.s
.asection
= sectp
;
10615 type_section
.size
= bfd_get_section_size (sectp
);
10616 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10621 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10622 by PER_CU. This is for the non-DWP case.
10623 The result is NULL if DWO_NAME can't be found. */
10625 static struct dwo_file
*
10626 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10627 const char *dwo_name
, const char *comp_dir
)
10629 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10630 struct dwo_file
*dwo_file
;
10632 struct cleanup
*cleanups
;
10634 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10637 if (dwarf_read_debug
)
10638 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10641 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10642 dwo_file
->dwo_name
= dwo_name
;
10643 dwo_file
->comp_dir
= comp_dir
;
10644 dwo_file
->dbfd
= dbfd
;
10646 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10648 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10650 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10652 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10653 dwo_file
->sections
.types
);
10655 discard_cleanups (cleanups
);
10657 if (dwarf_read_debug
)
10658 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10663 /* This function is mapped across the sections and remembers the offset and
10664 size of each of the DWP debugging sections common to version 1 and 2 that
10665 we are interested in. */
10668 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10669 void *dwp_file_ptr
)
10671 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10672 const struct dwop_section_names
*names
= &dwop_section_names
;
10673 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10675 /* Record the ELF section number for later lookup: this is what the
10676 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10677 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10678 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10680 /* Look for specific sections that we need. */
10681 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10683 dwp_file
->sections
.str
.s
.asection
= sectp
;
10684 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10686 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10688 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10689 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10691 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10693 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10694 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10698 /* This function is mapped across the sections and remembers the offset and
10699 size of each of the DWP version 2 debugging sections that we are interested
10700 in. This is split into a separate function because we don't know if we
10701 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10704 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10706 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10707 const struct dwop_section_names
*names
= &dwop_section_names
;
10708 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10710 /* Record the ELF section number for later lookup: this is what the
10711 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10712 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10713 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10715 /* Look for specific sections that we need. */
10716 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10718 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10719 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10721 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10723 dwp_file
->sections
.info
.s
.asection
= sectp
;
10724 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10726 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10728 dwp_file
->sections
.line
.s
.asection
= sectp
;
10729 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10731 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10733 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10734 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10736 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10738 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10739 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10741 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10743 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10744 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10746 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10748 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10749 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10751 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10753 dwp_file
->sections
.types
.s
.asection
= sectp
;
10754 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10758 /* Hash function for dwp_file loaded CUs/TUs. */
10761 hash_dwp_loaded_cutus (const void *item
)
10763 const struct dwo_unit
*dwo_unit
= item
;
10765 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10766 return dwo_unit
->signature
;
10769 /* Equality function for dwp_file loaded CUs/TUs. */
10772 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10774 const struct dwo_unit
*dua
= a
;
10775 const struct dwo_unit
*dub
= b
;
10777 return dua
->signature
== dub
->signature
;
10780 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10783 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10785 return htab_create_alloc_ex (3,
10786 hash_dwp_loaded_cutus
,
10787 eq_dwp_loaded_cutus
,
10789 &objfile
->objfile_obstack
,
10790 hashtab_obstack_allocate
,
10791 dummy_obstack_deallocate
);
10794 /* Try to open DWP file FILE_NAME.
10795 The result is the bfd handle of the file.
10796 If there is a problem finding or opening the file, return NULL.
10797 Upon success, the canonicalized path of the file is stored in the bfd,
10798 same as symfile_bfd_open. */
10801 open_dwp_file (const char *file_name
)
10805 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10809 /* Work around upstream bug 15652.
10810 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10811 [Whether that's a "bug" is debatable, but it is getting in our way.]
10812 We have no real idea where the dwp file is, because gdb's realpath-ing
10813 of the executable's path may have discarded the needed info.
10814 [IWBN if the dwp file name was recorded in the executable, akin to
10815 .gnu_debuglink, but that doesn't exist yet.]
10816 Strip the directory from FILE_NAME and search again. */
10817 if (*debug_file_directory
!= '\0')
10819 /* Don't implicitly search the current directory here.
10820 If the user wants to search "." to handle this case,
10821 it must be added to debug-file-directory. */
10822 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10829 /* Initialize the use of the DWP file for the current objfile.
10830 By convention the name of the DWP file is ${objfile}.dwp.
10831 The result is NULL if it can't be found. */
10833 static struct dwp_file
*
10834 open_and_init_dwp_file (void)
10836 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10837 struct dwp_file
*dwp_file
;
10840 struct cleanup
*cleanups
;
10842 /* Try to find first .dwp for the binary file before any symbolic links
10844 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10845 cleanups
= make_cleanup (xfree
, dwp_name
);
10847 dbfd
= open_dwp_file (dwp_name
);
10849 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10851 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10852 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10853 make_cleanup (xfree
, dwp_name
);
10854 dbfd
= open_dwp_file (dwp_name
);
10859 if (dwarf_read_debug
)
10860 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10861 do_cleanups (cleanups
);
10864 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10865 dwp_file
->name
= bfd_get_filename (dbfd
);
10866 dwp_file
->dbfd
= dbfd
;
10867 do_cleanups (cleanups
);
10869 /* +1: section 0 is unused */
10870 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10871 dwp_file
->elf_sections
=
10872 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10873 dwp_file
->num_sections
, asection
*);
10875 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10877 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10879 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10881 /* The DWP file version is stored in the hash table. Oh well. */
10882 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10884 /* Technically speaking, we should try to limp along, but this is
10885 pretty bizarre. We use pulongest here because that's the established
10886 portability solution (e.g, we cannot use %u for uint32_t). */
10887 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10888 " TU version %s [in DWP file %s]"),
10889 pulongest (dwp_file
->cus
->version
),
10890 pulongest (dwp_file
->tus
->version
), dwp_name
);
10892 dwp_file
->version
= dwp_file
->cus
->version
;
10894 if (dwp_file
->version
== 2)
10895 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10897 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10898 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10900 if (dwarf_read_debug
)
10902 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10903 fprintf_unfiltered (gdb_stdlog
,
10904 " %s CUs, %s TUs\n",
10905 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10906 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10912 /* Wrapper around open_and_init_dwp_file, only open it once. */
10914 static struct dwp_file
*
10915 get_dwp_file (void)
10917 if (! dwarf2_per_objfile
->dwp_checked
)
10919 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10920 dwarf2_per_objfile
->dwp_checked
= 1;
10922 return dwarf2_per_objfile
->dwp_file
;
10925 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10926 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10927 or in the DWP file for the objfile, referenced by THIS_UNIT.
10928 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10929 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10931 This is called, for example, when wanting to read a variable with a
10932 complex location. Therefore we don't want to do file i/o for every call.
10933 Therefore we don't want to look for a DWO file on every call.
10934 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10935 then we check if we've already seen DWO_NAME, and only THEN do we check
10938 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10939 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10941 static struct dwo_unit
*
10942 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10943 const char *dwo_name
, const char *comp_dir
,
10944 ULONGEST signature
, int is_debug_types
)
10946 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10947 const char *kind
= is_debug_types
? "TU" : "CU";
10948 void **dwo_file_slot
;
10949 struct dwo_file
*dwo_file
;
10950 struct dwp_file
*dwp_file
;
10952 /* First see if there's a DWP file.
10953 If we have a DWP file but didn't find the DWO inside it, don't
10954 look for the original DWO file. It makes gdb behave differently
10955 depending on whether one is debugging in the build tree. */
10957 dwp_file
= get_dwp_file ();
10958 if (dwp_file
!= NULL
)
10960 const struct dwp_hash_table
*dwp_htab
=
10961 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10963 if (dwp_htab
!= NULL
)
10965 struct dwo_unit
*dwo_cutu
=
10966 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10967 signature
, is_debug_types
);
10969 if (dwo_cutu
!= NULL
)
10971 if (dwarf_read_debug
)
10973 fprintf_unfiltered (gdb_stdlog
,
10974 "Virtual DWO %s %s found: @%s\n",
10975 kind
, hex_string (signature
),
10976 host_address_to_string (dwo_cutu
));
10984 /* No DWP file, look for the DWO file. */
10986 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10987 if (*dwo_file_slot
== NULL
)
10989 /* Read in the file and build a table of the CUs/TUs it contains. */
10990 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10992 /* NOTE: This will be NULL if unable to open the file. */
10993 dwo_file
= *dwo_file_slot
;
10995 if (dwo_file
!= NULL
)
10997 struct dwo_unit
*dwo_cutu
= NULL
;
10999 if (is_debug_types
&& dwo_file
->tus
)
11001 struct dwo_unit find_dwo_cutu
;
11003 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11004 find_dwo_cutu
.signature
= signature
;
11005 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11007 else if (!is_debug_types
&& dwo_file
->cu
)
11009 if (signature
== dwo_file
->cu
->signature
)
11010 dwo_cutu
= dwo_file
->cu
;
11013 if (dwo_cutu
!= NULL
)
11015 if (dwarf_read_debug
)
11017 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11018 kind
, dwo_name
, hex_string (signature
),
11019 host_address_to_string (dwo_cutu
));
11026 /* We didn't find it. This could mean a dwo_id mismatch, or
11027 someone deleted the DWO/DWP file, or the search path isn't set up
11028 correctly to find the file. */
11030 if (dwarf_read_debug
)
11032 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11033 kind
, dwo_name
, hex_string (signature
));
11036 /* This is a warning and not a complaint because it can be caused by
11037 pilot error (e.g., user accidentally deleting the DWO). */
11039 /* Print the name of the DWP file if we looked there, helps the user
11040 better diagnose the problem. */
11041 char *dwp_text
= NULL
;
11042 struct cleanup
*cleanups
;
11044 if (dwp_file
!= NULL
)
11045 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11046 cleanups
= make_cleanup (xfree
, dwp_text
);
11048 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11049 " [in module %s]"),
11050 kind
, dwo_name
, hex_string (signature
),
11051 dwp_text
!= NULL
? dwp_text
: "",
11052 this_unit
->is_debug_types
? "TU" : "CU",
11053 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11055 do_cleanups (cleanups
);
11060 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11061 See lookup_dwo_cutu_unit for details. */
11063 static struct dwo_unit
*
11064 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11065 const char *dwo_name
, const char *comp_dir
,
11066 ULONGEST signature
)
11068 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11071 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11072 See lookup_dwo_cutu_unit for details. */
11074 static struct dwo_unit
*
11075 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11076 const char *dwo_name
, const char *comp_dir
)
11078 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11081 /* Traversal function for queue_and_load_all_dwo_tus. */
11084 queue_and_load_dwo_tu (void **slot
, void *info
)
11086 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11087 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11088 ULONGEST signature
= dwo_unit
->signature
;
11089 struct signatured_type
*sig_type
=
11090 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11092 if (sig_type
!= NULL
)
11094 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11096 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11097 a real dependency of PER_CU on SIG_TYPE. That is detected later
11098 while processing PER_CU. */
11099 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11100 load_full_type_unit (sig_cu
);
11101 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11107 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11108 The DWO may have the only definition of the type, though it may not be
11109 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11110 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11113 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11115 struct dwo_unit
*dwo_unit
;
11116 struct dwo_file
*dwo_file
;
11118 gdb_assert (!per_cu
->is_debug_types
);
11119 gdb_assert (get_dwp_file () == NULL
);
11120 gdb_assert (per_cu
->cu
!= NULL
);
11122 dwo_unit
= per_cu
->cu
->dwo_unit
;
11123 gdb_assert (dwo_unit
!= NULL
);
11125 dwo_file
= dwo_unit
->dwo_file
;
11126 if (dwo_file
->tus
!= NULL
)
11127 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11130 /* Free all resources associated with DWO_FILE.
11131 Close the DWO file and munmap the sections.
11132 All memory should be on the objfile obstack. */
11135 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11138 struct dwarf2_section_info
*section
;
11140 /* Note: dbfd is NULL for virtual DWO files. */
11141 gdb_bfd_unref (dwo_file
->dbfd
);
11143 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11146 /* Wrapper for free_dwo_file for use in cleanups. */
11149 free_dwo_file_cleanup (void *arg
)
11151 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11152 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11154 free_dwo_file (dwo_file
, objfile
);
11157 /* Traversal function for free_dwo_files. */
11160 free_dwo_file_from_slot (void **slot
, void *info
)
11162 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11163 struct objfile
*objfile
= (struct objfile
*) info
;
11165 free_dwo_file (dwo_file
, objfile
);
11170 /* Free all resources associated with DWO_FILES. */
11173 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11175 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11178 /* Read in various DIEs. */
11180 /* qsort helper for inherit_abstract_dies. */
11183 unsigned_int_compar (const void *ap
, const void *bp
)
11185 unsigned int a
= *(unsigned int *) ap
;
11186 unsigned int b
= *(unsigned int *) bp
;
11188 return (a
> b
) - (b
> a
);
11191 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11192 Inherit only the children of the DW_AT_abstract_origin DIE not being
11193 already referenced by DW_AT_abstract_origin from the children of the
11197 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11199 struct die_info
*child_die
;
11200 unsigned die_children_count
;
11201 /* CU offsets which were referenced by children of the current DIE. */
11202 sect_offset
*offsets
;
11203 sect_offset
*offsets_end
, *offsetp
;
11204 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11205 struct die_info
*origin_die
;
11206 /* Iterator of the ORIGIN_DIE children. */
11207 struct die_info
*origin_child_die
;
11208 struct cleanup
*cleanups
;
11209 struct attribute
*attr
;
11210 struct dwarf2_cu
*origin_cu
;
11211 struct pending
**origin_previous_list_in_scope
;
11213 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11217 /* Note that following die references may follow to a die in a
11221 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11223 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11225 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11226 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11228 if (die
->tag
!= origin_die
->tag
11229 && !(die
->tag
== DW_TAG_inlined_subroutine
11230 && origin_die
->tag
== DW_TAG_subprogram
))
11231 complaint (&symfile_complaints
,
11232 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11233 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11235 child_die
= die
->child
;
11236 die_children_count
= 0;
11237 while (child_die
&& child_die
->tag
)
11239 child_die
= sibling_die (child_die
);
11240 die_children_count
++;
11242 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11243 cleanups
= make_cleanup (xfree
, offsets
);
11245 offsets_end
= offsets
;
11246 for (child_die
= die
->child
;
11247 child_die
&& child_die
->tag
;
11248 child_die
= sibling_die (child_die
))
11250 struct die_info
*child_origin_die
;
11251 struct dwarf2_cu
*child_origin_cu
;
11253 /* We are trying to process concrete instance entries:
11254 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11255 it's not relevant to our analysis here. i.e. detecting DIEs that are
11256 present in the abstract instance but not referenced in the concrete
11258 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11261 /* For each CHILD_DIE, find the corresponding child of
11262 ORIGIN_DIE. If there is more than one layer of
11263 DW_AT_abstract_origin, follow them all; there shouldn't be,
11264 but GCC versions at least through 4.4 generate this (GCC PR
11266 child_origin_die
= child_die
;
11267 child_origin_cu
= cu
;
11270 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11274 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11278 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11279 counterpart may exist. */
11280 if (child_origin_die
!= child_die
)
11282 if (child_die
->tag
!= child_origin_die
->tag
11283 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11284 && child_origin_die
->tag
== DW_TAG_subprogram
))
11285 complaint (&symfile_complaints
,
11286 _("Child DIE 0x%x and its abstract origin 0x%x have "
11287 "different tags"), child_die
->offset
.sect_off
,
11288 child_origin_die
->offset
.sect_off
);
11289 if (child_origin_die
->parent
!= origin_die
)
11290 complaint (&symfile_complaints
,
11291 _("Child DIE 0x%x and its abstract origin 0x%x have "
11292 "different parents"), child_die
->offset
.sect_off
,
11293 child_origin_die
->offset
.sect_off
);
11295 *offsets_end
++ = child_origin_die
->offset
;
11298 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11299 unsigned_int_compar
);
11300 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11301 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11302 complaint (&symfile_complaints
,
11303 _("Multiple children of DIE 0x%x refer "
11304 "to DIE 0x%x as their abstract origin"),
11305 die
->offset
.sect_off
, offsetp
->sect_off
);
11308 origin_child_die
= origin_die
->child
;
11309 while (origin_child_die
&& origin_child_die
->tag
)
11311 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11312 while (offsetp
< offsets_end
11313 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11315 if (offsetp
>= offsets_end
11316 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11318 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11319 Check whether we're already processing ORIGIN_CHILD_DIE.
11320 This can happen with mutually referenced abstract_origins.
11322 if (!origin_child_die
->in_process
)
11323 process_die (origin_child_die
, origin_cu
);
11325 origin_child_die
= sibling_die (origin_child_die
);
11327 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11329 do_cleanups (cleanups
);
11333 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11335 struct objfile
*objfile
= cu
->objfile
;
11336 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11337 struct context_stack
*newobj
;
11340 struct die_info
*child_die
;
11341 struct attribute
*attr
, *call_line
, *call_file
;
11343 CORE_ADDR baseaddr
;
11344 struct block
*block
;
11345 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11346 VEC (symbolp
) *template_args
= NULL
;
11347 struct template_symbol
*templ_func
= NULL
;
11351 /* If we do not have call site information, we can't show the
11352 caller of this inlined function. That's too confusing, so
11353 only use the scope for local variables. */
11354 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11355 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11356 if (call_line
== NULL
|| call_file
== NULL
)
11358 read_lexical_block_scope (die
, cu
);
11363 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11365 name
= dwarf2_name (die
, cu
);
11367 /* Ignore functions with missing or empty names. These are actually
11368 illegal according to the DWARF standard. */
11371 complaint (&symfile_complaints
,
11372 _("missing name for subprogram DIE at %d"),
11373 die
->offset
.sect_off
);
11377 /* Ignore functions with missing or invalid low and high pc attributes. */
11378 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11380 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11381 if (!attr
|| !DW_UNSND (attr
))
11382 complaint (&symfile_complaints
,
11383 _("cannot get low and high bounds "
11384 "for subprogram DIE at %d"),
11385 die
->offset
.sect_off
);
11389 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11390 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11392 /* If we have any template arguments, then we must allocate a
11393 different sort of symbol. */
11394 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11396 if (child_die
->tag
== DW_TAG_template_type_param
11397 || child_die
->tag
== DW_TAG_template_value_param
)
11399 templ_func
= allocate_template_symbol (objfile
);
11400 templ_func
->base
.is_cplus_template_function
= 1;
11405 newobj
= push_context (0, lowpc
);
11406 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11407 (struct symbol
*) templ_func
);
11409 /* If there is a location expression for DW_AT_frame_base, record
11411 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11413 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11415 cu
->list_in_scope
= &local_symbols
;
11417 if (die
->child
!= NULL
)
11419 child_die
= die
->child
;
11420 while (child_die
&& child_die
->tag
)
11422 if (child_die
->tag
== DW_TAG_template_type_param
11423 || child_die
->tag
== DW_TAG_template_value_param
)
11425 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11428 VEC_safe_push (symbolp
, template_args
, arg
);
11431 process_die (child_die
, cu
);
11432 child_die
= sibling_die (child_die
);
11436 inherit_abstract_dies (die
, cu
);
11438 /* If we have a DW_AT_specification, we might need to import using
11439 directives from the context of the specification DIE. See the
11440 comment in determine_prefix. */
11441 if (cu
->language
== language_cplus
11442 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11444 struct dwarf2_cu
*spec_cu
= cu
;
11445 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11449 child_die
= spec_die
->child
;
11450 while (child_die
&& child_die
->tag
)
11452 if (child_die
->tag
== DW_TAG_imported_module
)
11453 process_die (child_die
, spec_cu
);
11454 child_die
= sibling_die (child_die
);
11457 /* In some cases, GCC generates specification DIEs that
11458 themselves contain DW_AT_specification attributes. */
11459 spec_die
= die_specification (spec_die
, &spec_cu
);
11463 newobj
= pop_context ();
11464 /* Make a block for the local symbols within. */
11465 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11468 /* For C++, set the block's scope. */
11469 if ((cu
->language
== language_cplus
11470 || cu
->language
== language_fortran
11471 || cu
->language
== language_d
)
11472 && cu
->processing_has_namespace_info
)
11473 block_set_scope (block
, determine_prefix (die
, cu
),
11474 &objfile
->objfile_obstack
);
11476 /* If we have address ranges, record them. */
11477 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11479 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11481 /* Attach template arguments to function. */
11482 if (! VEC_empty (symbolp
, template_args
))
11484 gdb_assert (templ_func
!= NULL
);
11486 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11487 templ_func
->template_arguments
11488 = obstack_alloc (&objfile
->objfile_obstack
,
11489 (templ_func
->n_template_arguments
11490 * sizeof (struct symbol
*)));
11491 memcpy (templ_func
->template_arguments
,
11492 VEC_address (symbolp
, template_args
),
11493 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11494 VEC_free (symbolp
, template_args
);
11497 /* In C++, we can have functions nested inside functions (e.g., when
11498 a function declares a class that has methods). This means that
11499 when we finish processing a function scope, we may need to go
11500 back to building a containing block's symbol lists. */
11501 local_symbols
= newobj
->locals
;
11502 local_using_directives
= newobj
->local_using_directives
;
11504 /* If we've finished processing a top-level function, subsequent
11505 symbols go in the file symbol list. */
11506 if (outermost_context_p ())
11507 cu
->list_in_scope
= &file_symbols
;
11510 /* Process all the DIES contained within a lexical block scope. Start
11511 a new scope, process the dies, and then close the scope. */
11514 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11516 struct objfile
*objfile
= cu
->objfile
;
11517 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11518 struct context_stack
*newobj
;
11519 CORE_ADDR lowpc
, highpc
;
11520 struct die_info
*child_die
;
11521 CORE_ADDR baseaddr
;
11523 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11525 /* Ignore blocks with missing or invalid low and high pc attributes. */
11526 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11527 as multiple lexical blocks? Handling children in a sane way would
11528 be nasty. Might be easier to properly extend generic blocks to
11529 describe ranges. */
11530 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11532 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11533 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11535 push_context (0, lowpc
);
11536 if (die
->child
!= NULL
)
11538 child_die
= die
->child
;
11539 while (child_die
&& child_die
->tag
)
11541 process_die (child_die
, cu
);
11542 child_die
= sibling_die (child_die
);
11545 inherit_abstract_dies (die
, cu
);
11546 newobj
= pop_context ();
11548 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11550 struct block
*block
11551 = finish_block (0, &local_symbols
, newobj
->old_blocks
,
11552 newobj
->start_addr
, highpc
);
11554 /* Note that recording ranges after traversing children, as we
11555 do here, means that recording a parent's ranges entails
11556 walking across all its children's ranges as they appear in
11557 the address map, which is quadratic behavior.
11559 It would be nicer to record the parent's ranges before
11560 traversing its children, simply overriding whatever you find
11561 there. But since we don't even decide whether to create a
11562 block until after we've traversed its children, that's hard
11564 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11566 local_symbols
= newobj
->locals
;
11567 local_using_directives
= newobj
->local_using_directives
;
11570 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11573 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11575 struct objfile
*objfile
= cu
->objfile
;
11576 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11577 CORE_ADDR pc
, baseaddr
;
11578 struct attribute
*attr
;
11579 struct call_site
*call_site
, call_site_local
;
11582 struct die_info
*child_die
;
11584 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11586 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11589 complaint (&symfile_complaints
,
11590 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11591 "DIE 0x%x [in module %s]"),
11592 die
->offset
.sect_off
, objfile_name (objfile
));
11595 pc
= attr_value_as_address (attr
) + baseaddr
;
11596 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11598 if (cu
->call_site_htab
== NULL
)
11599 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11600 NULL
, &objfile
->objfile_obstack
,
11601 hashtab_obstack_allocate
, NULL
);
11602 call_site_local
.pc
= pc
;
11603 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11606 complaint (&symfile_complaints
,
11607 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11608 "DIE 0x%x [in module %s]"),
11609 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11610 objfile_name (objfile
));
11614 /* Count parameters at the caller. */
11617 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11618 child_die
= sibling_die (child_die
))
11620 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11622 complaint (&symfile_complaints
,
11623 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11624 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11625 child_die
->tag
, child_die
->offset
.sect_off
,
11626 objfile_name (objfile
));
11633 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11634 (sizeof (*call_site
)
11635 + (sizeof (*call_site
->parameter
)
11636 * (nparams
- 1))));
11638 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11639 call_site
->pc
= pc
;
11641 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11643 struct die_info
*func_die
;
11645 /* Skip also over DW_TAG_inlined_subroutine. */
11646 for (func_die
= die
->parent
;
11647 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11648 && func_die
->tag
!= DW_TAG_subroutine_type
;
11649 func_die
= func_die
->parent
);
11651 /* DW_AT_GNU_all_call_sites is a superset
11652 of DW_AT_GNU_all_tail_call_sites. */
11654 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11655 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11657 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11658 not complete. But keep CALL_SITE for look ups via call_site_htab,
11659 both the initial caller containing the real return address PC and
11660 the final callee containing the current PC of a chain of tail
11661 calls do not need to have the tail call list complete. But any
11662 function candidate for a virtual tail call frame searched via
11663 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11664 determined unambiguously. */
11668 struct type
*func_type
= NULL
;
11671 func_type
= get_die_type (func_die
, cu
);
11672 if (func_type
!= NULL
)
11674 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11676 /* Enlist this call site to the function. */
11677 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11678 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11681 complaint (&symfile_complaints
,
11682 _("Cannot find function owning DW_TAG_GNU_call_site "
11683 "DIE 0x%x [in module %s]"),
11684 die
->offset
.sect_off
, objfile_name (objfile
));
11688 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11690 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11691 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11692 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11693 /* Keep NULL DWARF_BLOCK. */;
11694 else if (attr_form_is_block (attr
))
11696 struct dwarf2_locexpr_baton
*dlbaton
;
11698 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11699 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11700 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11701 dlbaton
->per_cu
= cu
->per_cu
;
11703 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11705 else if (attr_form_is_ref (attr
))
11707 struct dwarf2_cu
*target_cu
= cu
;
11708 struct die_info
*target_die
;
11710 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11711 gdb_assert (target_cu
->objfile
== objfile
);
11712 if (die_is_declaration (target_die
, target_cu
))
11714 const char *target_physname
= NULL
;
11715 struct attribute
*target_attr
;
11717 /* Prefer the mangled name; otherwise compute the demangled one. */
11718 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11719 if (target_attr
== NULL
)
11720 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11722 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11723 target_physname
= DW_STRING (target_attr
);
11725 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11726 if (target_physname
== NULL
)
11727 complaint (&symfile_complaints
,
11728 _("DW_AT_GNU_call_site_target target DIE has invalid "
11729 "physname, for referencing DIE 0x%x [in module %s]"),
11730 die
->offset
.sect_off
, objfile_name (objfile
));
11732 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11738 /* DW_AT_entry_pc should be preferred. */
11739 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11740 complaint (&symfile_complaints
,
11741 _("DW_AT_GNU_call_site_target target DIE has invalid "
11742 "low pc, for referencing DIE 0x%x [in module %s]"),
11743 die
->offset
.sect_off
, objfile_name (objfile
));
11746 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11747 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11752 complaint (&symfile_complaints
,
11753 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11754 "block nor reference, for DIE 0x%x [in module %s]"),
11755 die
->offset
.sect_off
, objfile_name (objfile
));
11757 call_site
->per_cu
= cu
->per_cu
;
11759 for (child_die
= die
->child
;
11760 child_die
&& child_die
->tag
;
11761 child_die
= sibling_die (child_die
))
11763 struct call_site_parameter
*parameter
;
11764 struct attribute
*loc
, *origin
;
11766 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11768 /* Already printed the complaint above. */
11772 gdb_assert (call_site
->parameter_count
< nparams
);
11773 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11775 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11776 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11777 register is contained in DW_AT_GNU_call_site_value. */
11779 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11780 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11781 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11783 sect_offset offset
;
11785 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11786 offset
= dwarf2_get_ref_die_offset (origin
);
11787 if (!offset_in_cu_p (&cu
->header
, offset
))
11789 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11790 binding can be done only inside one CU. Such referenced DIE
11791 therefore cannot be even moved to DW_TAG_partial_unit. */
11792 complaint (&symfile_complaints
,
11793 _("DW_AT_abstract_origin offset is not in CU for "
11794 "DW_TAG_GNU_call_site child DIE 0x%x "
11796 child_die
->offset
.sect_off
, objfile_name (objfile
));
11799 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11800 - cu
->header
.offset
.sect_off
);
11802 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11804 complaint (&symfile_complaints
,
11805 _("No DW_FORM_block* DW_AT_location for "
11806 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11807 child_die
->offset
.sect_off
, objfile_name (objfile
));
11812 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11813 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11814 if (parameter
->u
.dwarf_reg
!= -1)
11815 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11816 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11817 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11818 ¶meter
->u
.fb_offset
))
11819 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11822 complaint (&symfile_complaints
,
11823 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11824 "for DW_FORM_block* DW_AT_location is supported for "
11825 "DW_TAG_GNU_call_site child DIE 0x%x "
11827 child_die
->offset
.sect_off
, objfile_name (objfile
));
11832 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11833 if (!attr_form_is_block (attr
))
11835 complaint (&symfile_complaints
,
11836 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11837 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11838 child_die
->offset
.sect_off
, objfile_name (objfile
));
11841 parameter
->value
= DW_BLOCK (attr
)->data
;
11842 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11844 /* Parameters are not pre-cleared by memset above. */
11845 parameter
->data_value
= NULL
;
11846 parameter
->data_value_size
= 0;
11847 call_site
->parameter_count
++;
11849 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11852 if (!attr_form_is_block (attr
))
11853 complaint (&symfile_complaints
,
11854 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11855 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11856 child_die
->offset
.sect_off
, objfile_name (objfile
));
11859 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11860 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11866 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11867 Return 1 if the attributes are present and valid, otherwise, return 0.
11868 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11871 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11872 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11873 struct partial_symtab
*ranges_pst
)
11875 struct objfile
*objfile
= cu
->objfile
;
11876 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11877 struct comp_unit_head
*cu_header
= &cu
->header
;
11878 bfd
*obfd
= objfile
->obfd
;
11879 unsigned int addr_size
= cu_header
->addr_size
;
11880 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11881 /* Base address selection entry. */
11884 unsigned int dummy
;
11885 const gdb_byte
*buffer
;
11889 CORE_ADDR high
= 0;
11890 CORE_ADDR baseaddr
;
11892 found_base
= cu
->base_known
;
11893 base
= cu
->base_address
;
11895 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11896 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11898 complaint (&symfile_complaints
,
11899 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11903 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11905 /* Read in the largest possible address. */
11906 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11907 if ((marker
& mask
) == mask
)
11909 /* If we found the largest possible address, then
11910 read the base address. */
11911 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11912 buffer
+= 2 * addr_size
;
11913 offset
+= 2 * addr_size
;
11919 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11923 CORE_ADDR range_beginning
, range_end
;
11925 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11926 buffer
+= addr_size
;
11927 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11928 buffer
+= addr_size
;
11929 offset
+= 2 * addr_size
;
11931 /* An end of list marker is a pair of zero addresses. */
11932 if (range_beginning
== 0 && range_end
== 0)
11933 /* Found the end of list entry. */
11936 /* Each base address selection entry is a pair of 2 values.
11937 The first is the largest possible address, the second is
11938 the base address. Check for a base address here. */
11939 if ((range_beginning
& mask
) == mask
)
11941 /* If we found the largest possible address, then
11942 read the base address. */
11943 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11950 /* We have no valid base address for the ranges
11952 complaint (&symfile_complaints
,
11953 _("Invalid .debug_ranges data (no base address)"));
11957 if (range_beginning
> range_end
)
11959 /* Inverted range entries are invalid. */
11960 complaint (&symfile_complaints
,
11961 _("Invalid .debug_ranges data (inverted range)"));
11965 /* Empty range entries have no effect. */
11966 if (range_beginning
== range_end
)
11969 range_beginning
+= base
;
11972 /* A not-uncommon case of bad debug info.
11973 Don't pollute the addrmap with bad data. */
11974 if (range_beginning
+ baseaddr
== 0
11975 && !dwarf2_per_objfile
->has_section_at_zero
)
11977 complaint (&symfile_complaints
,
11978 _(".debug_ranges entry has start address of zero"
11979 " [in module %s]"), objfile_name (objfile
));
11983 if (ranges_pst
!= NULL
)
11988 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11989 range_beginning
+ baseaddr
);
11990 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11991 range_end
+ baseaddr
);
11992 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11996 /* FIXME: This is recording everything as a low-high
11997 segment of consecutive addresses. We should have a
11998 data structure for discontiguous block ranges
12002 low
= range_beginning
;
12008 if (range_beginning
< low
)
12009 low
= range_beginning
;
12010 if (range_end
> high
)
12016 /* If the first entry is an end-of-list marker, the range
12017 describes an empty scope, i.e. no instructions. */
12023 *high_return
= high
;
12027 /* Get low and high pc attributes from a die. Return 1 if the attributes
12028 are present and valid, otherwise, return 0. Return -1 if the range is
12029 discontinuous, i.e. derived from DW_AT_ranges information. */
12032 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12033 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12034 struct partial_symtab
*pst
)
12036 struct attribute
*attr
;
12037 struct attribute
*attr_high
;
12039 CORE_ADDR high
= 0;
12042 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12045 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12048 low
= attr_value_as_address (attr
);
12049 high
= attr_value_as_address (attr_high
);
12050 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12054 /* Found high w/o low attribute. */
12057 /* Found consecutive range of addresses. */
12062 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12065 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12066 We take advantage of the fact that DW_AT_ranges does not appear
12067 in DW_TAG_compile_unit of DWO files. */
12068 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12069 unsigned int ranges_offset
= (DW_UNSND (attr
)
12070 + (need_ranges_base
12074 /* Value of the DW_AT_ranges attribute is the offset in the
12075 .debug_ranges section. */
12076 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12078 /* Found discontinuous range of addresses. */
12083 /* read_partial_die has also the strict LOW < HIGH requirement. */
12087 /* When using the GNU linker, .gnu.linkonce. sections are used to
12088 eliminate duplicate copies of functions and vtables and such.
12089 The linker will arbitrarily choose one and discard the others.
12090 The AT_*_pc values for such functions refer to local labels in
12091 these sections. If the section from that file was discarded, the
12092 labels are not in the output, so the relocs get a value of 0.
12093 If this is a discarded function, mark the pc bounds as invalid,
12094 so that GDB will ignore it. */
12095 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12104 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12105 its low and high PC addresses. Do nothing if these addresses could not
12106 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12107 and HIGHPC to the high address if greater than HIGHPC. */
12110 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12111 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12112 struct dwarf2_cu
*cu
)
12114 CORE_ADDR low
, high
;
12115 struct die_info
*child
= die
->child
;
12117 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12119 *lowpc
= min (*lowpc
, low
);
12120 *highpc
= max (*highpc
, high
);
12123 /* If the language does not allow nested subprograms (either inside
12124 subprograms or lexical blocks), we're done. */
12125 if (cu
->language
!= language_ada
)
12128 /* Check all the children of the given DIE. If it contains nested
12129 subprograms, then check their pc bounds. Likewise, we need to
12130 check lexical blocks as well, as they may also contain subprogram
12132 while (child
&& child
->tag
)
12134 if (child
->tag
== DW_TAG_subprogram
12135 || child
->tag
== DW_TAG_lexical_block
)
12136 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12137 child
= sibling_die (child
);
12141 /* Get the low and high pc's represented by the scope DIE, and store
12142 them in *LOWPC and *HIGHPC. If the correct values can't be
12143 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12146 get_scope_pc_bounds (struct die_info
*die
,
12147 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12148 struct dwarf2_cu
*cu
)
12150 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12151 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12152 CORE_ADDR current_low
, current_high
;
12154 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12156 best_low
= current_low
;
12157 best_high
= current_high
;
12161 struct die_info
*child
= die
->child
;
12163 while (child
&& child
->tag
)
12165 switch (child
->tag
) {
12166 case DW_TAG_subprogram
:
12167 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12169 case DW_TAG_namespace
:
12170 case DW_TAG_module
:
12171 /* FIXME: carlton/2004-01-16: Should we do this for
12172 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12173 that current GCC's always emit the DIEs corresponding
12174 to definitions of methods of classes as children of a
12175 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12176 the DIEs giving the declarations, which could be
12177 anywhere). But I don't see any reason why the
12178 standards says that they have to be there. */
12179 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12181 if (current_low
!= ((CORE_ADDR
) -1))
12183 best_low
= min (best_low
, current_low
);
12184 best_high
= max (best_high
, current_high
);
12192 child
= sibling_die (child
);
12197 *highpc
= best_high
;
12200 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12204 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12205 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12207 struct objfile
*objfile
= cu
->objfile
;
12208 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12209 struct attribute
*attr
;
12210 struct attribute
*attr_high
;
12212 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12215 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12218 CORE_ADDR low
= attr_value_as_address (attr
);
12219 CORE_ADDR high
= attr_value_as_address (attr_high
);
12221 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12224 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12225 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12226 record_block_range (block
, low
, high
- 1);
12230 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12233 bfd
*obfd
= objfile
->obfd
;
12234 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12235 We take advantage of the fact that DW_AT_ranges does not appear
12236 in DW_TAG_compile_unit of DWO files. */
12237 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12239 /* The value of the DW_AT_ranges attribute is the offset of the
12240 address range list in the .debug_ranges section. */
12241 unsigned long offset
= (DW_UNSND (attr
)
12242 + (need_ranges_base
? cu
->ranges_base
: 0));
12243 const gdb_byte
*buffer
;
12245 /* For some target architectures, but not others, the
12246 read_address function sign-extends the addresses it returns.
12247 To recognize base address selection entries, we need a
12249 unsigned int addr_size
= cu
->header
.addr_size
;
12250 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12252 /* The base address, to which the next pair is relative. Note
12253 that this 'base' is a DWARF concept: most entries in a range
12254 list are relative, to reduce the number of relocs against the
12255 debugging information. This is separate from this function's
12256 'baseaddr' argument, which GDB uses to relocate debugging
12257 information from a shared library based on the address at
12258 which the library was loaded. */
12259 CORE_ADDR base
= cu
->base_address
;
12260 int base_known
= cu
->base_known
;
12262 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12263 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12265 complaint (&symfile_complaints
,
12266 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12270 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12274 unsigned int bytes_read
;
12275 CORE_ADDR start
, end
;
12277 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12278 buffer
+= bytes_read
;
12279 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12280 buffer
+= bytes_read
;
12282 /* Did we find the end of the range list? */
12283 if (start
== 0 && end
== 0)
12286 /* Did we find a base address selection entry? */
12287 else if ((start
& base_select_mask
) == base_select_mask
)
12293 /* We found an ordinary address range. */
12298 complaint (&symfile_complaints
,
12299 _("Invalid .debug_ranges data "
12300 "(no base address)"));
12306 /* Inverted range entries are invalid. */
12307 complaint (&symfile_complaints
,
12308 _("Invalid .debug_ranges data "
12309 "(inverted range)"));
12313 /* Empty range entries have no effect. */
12317 start
+= base
+ baseaddr
;
12318 end
+= base
+ baseaddr
;
12320 /* A not-uncommon case of bad debug info.
12321 Don't pollute the addrmap with bad data. */
12322 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12324 complaint (&symfile_complaints
,
12325 _(".debug_ranges entry has start address of zero"
12326 " [in module %s]"), objfile_name (objfile
));
12330 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12331 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12332 record_block_range (block
, start
, end
- 1);
12338 /* Check whether the producer field indicates either of GCC < 4.6, or the
12339 Intel C/C++ compiler, and cache the result in CU. */
12342 check_producer (struct dwarf2_cu
*cu
)
12347 if (cu
->producer
== NULL
)
12349 /* For unknown compilers expect their behavior is DWARF version
12352 GCC started to support .debug_types sections by -gdwarf-4 since
12353 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12354 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12355 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12356 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12358 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12360 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12361 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12363 else if (startswith (cu
->producer
, "Intel(R) C"))
12364 cu
->producer_is_icc
= 1;
12367 /* For other non-GCC compilers, expect their behavior is DWARF version
12371 cu
->checked_producer
= 1;
12374 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12375 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12376 during 4.6.0 experimental. */
12379 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12381 if (!cu
->checked_producer
)
12382 check_producer (cu
);
12384 return cu
->producer_is_gxx_lt_4_6
;
12387 /* Return the default accessibility type if it is not overriden by
12388 DW_AT_accessibility. */
12390 static enum dwarf_access_attribute
12391 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12393 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12395 /* The default DWARF 2 accessibility for members is public, the default
12396 accessibility for inheritance is private. */
12398 if (die
->tag
!= DW_TAG_inheritance
)
12399 return DW_ACCESS_public
;
12401 return DW_ACCESS_private
;
12405 /* DWARF 3+ defines the default accessibility a different way. The same
12406 rules apply now for DW_TAG_inheritance as for the members and it only
12407 depends on the container kind. */
12409 if (die
->parent
->tag
== DW_TAG_class_type
)
12410 return DW_ACCESS_private
;
12412 return DW_ACCESS_public
;
12416 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12417 offset. If the attribute was not found return 0, otherwise return
12418 1. If it was found but could not properly be handled, set *OFFSET
12422 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12425 struct attribute
*attr
;
12427 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12432 /* Note that we do not check for a section offset first here.
12433 This is because DW_AT_data_member_location is new in DWARF 4,
12434 so if we see it, we can assume that a constant form is really
12435 a constant and not a section offset. */
12436 if (attr_form_is_constant (attr
))
12437 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12438 else if (attr_form_is_section_offset (attr
))
12439 dwarf2_complex_location_expr_complaint ();
12440 else if (attr_form_is_block (attr
))
12441 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12443 dwarf2_complex_location_expr_complaint ();
12451 /* Add an aggregate field to the field list. */
12454 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12455 struct dwarf2_cu
*cu
)
12457 struct objfile
*objfile
= cu
->objfile
;
12458 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12459 struct nextfield
*new_field
;
12460 struct attribute
*attr
;
12462 const char *fieldname
= "";
12464 /* Allocate a new field list entry and link it in. */
12465 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12466 make_cleanup (xfree
, new_field
);
12467 memset (new_field
, 0, sizeof (struct nextfield
));
12469 if (die
->tag
== DW_TAG_inheritance
)
12471 new_field
->next
= fip
->baseclasses
;
12472 fip
->baseclasses
= new_field
;
12476 new_field
->next
= fip
->fields
;
12477 fip
->fields
= new_field
;
12481 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12483 new_field
->accessibility
= DW_UNSND (attr
);
12485 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12486 if (new_field
->accessibility
!= DW_ACCESS_public
)
12487 fip
->non_public_fields
= 1;
12489 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12491 new_field
->virtuality
= DW_UNSND (attr
);
12493 new_field
->virtuality
= DW_VIRTUALITY_none
;
12495 fp
= &new_field
->field
;
12497 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12501 /* Data member other than a C++ static data member. */
12503 /* Get type of field. */
12504 fp
->type
= die_type (die
, cu
);
12506 SET_FIELD_BITPOS (*fp
, 0);
12508 /* Get bit size of field (zero if none). */
12509 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12512 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12516 FIELD_BITSIZE (*fp
) = 0;
12519 /* Get bit offset of field. */
12520 if (handle_data_member_location (die
, cu
, &offset
))
12521 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12522 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12525 if (gdbarch_bits_big_endian (gdbarch
))
12527 /* For big endian bits, the DW_AT_bit_offset gives the
12528 additional bit offset from the MSB of the containing
12529 anonymous object to the MSB of the field. We don't
12530 have to do anything special since we don't need to
12531 know the size of the anonymous object. */
12532 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12536 /* For little endian bits, compute the bit offset to the
12537 MSB of the anonymous object, subtract off the number of
12538 bits from the MSB of the field to the MSB of the
12539 object, and then subtract off the number of bits of
12540 the field itself. The result is the bit offset of
12541 the LSB of the field. */
12542 int anonymous_size
;
12543 int bit_offset
= DW_UNSND (attr
);
12545 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12548 /* The size of the anonymous object containing
12549 the bit field is explicit, so use the
12550 indicated size (in bytes). */
12551 anonymous_size
= DW_UNSND (attr
);
12555 /* The size of the anonymous object containing
12556 the bit field must be inferred from the type
12557 attribute of the data member containing the
12559 anonymous_size
= TYPE_LENGTH (fp
->type
);
12561 SET_FIELD_BITPOS (*fp
,
12562 (FIELD_BITPOS (*fp
)
12563 + anonymous_size
* bits_per_byte
12564 - bit_offset
- FIELD_BITSIZE (*fp
)));
12568 /* Get name of field. */
12569 fieldname
= dwarf2_name (die
, cu
);
12570 if (fieldname
== NULL
)
12573 /* The name is already allocated along with this objfile, so we don't
12574 need to duplicate it for the type. */
12575 fp
->name
= fieldname
;
12577 /* Change accessibility for artificial fields (e.g. virtual table
12578 pointer or virtual base class pointer) to private. */
12579 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12581 FIELD_ARTIFICIAL (*fp
) = 1;
12582 new_field
->accessibility
= DW_ACCESS_private
;
12583 fip
->non_public_fields
= 1;
12586 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12588 /* C++ static member. */
12590 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12591 is a declaration, but all versions of G++ as of this writing
12592 (so through at least 3.2.1) incorrectly generate
12593 DW_TAG_variable tags. */
12595 const char *physname
;
12597 /* Get name of field. */
12598 fieldname
= dwarf2_name (die
, cu
);
12599 if (fieldname
== NULL
)
12602 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12604 /* Only create a symbol if this is an external value.
12605 new_symbol checks this and puts the value in the global symbol
12606 table, which we want. If it is not external, new_symbol
12607 will try to put the value in cu->list_in_scope which is wrong. */
12608 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12610 /* A static const member, not much different than an enum as far as
12611 we're concerned, except that we can support more types. */
12612 new_symbol (die
, NULL
, cu
);
12615 /* Get physical name. */
12616 physname
= dwarf2_physname (fieldname
, die
, cu
);
12618 /* The name is already allocated along with this objfile, so we don't
12619 need to duplicate it for the type. */
12620 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12621 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12622 FIELD_NAME (*fp
) = fieldname
;
12624 else if (die
->tag
== DW_TAG_inheritance
)
12628 /* C++ base class field. */
12629 if (handle_data_member_location (die
, cu
, &offset
))
12630 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12631 FIELD_BITSIZE (*fp
) = 0;
12632 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12633 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12634 fip
->nbaseclasses
++;
12638 /* Add a typedef defined in the scope of the FIP's class. */
12641 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12642 struct dwarf2_cu
*cu
)
12644 struct objfile
*objfile
= cu
->objfile
;
12645 struct typedef_field_list
*new_field
;
12646 struct attribute
*attr
;
12647 struct typedef_field
*fp
;
12648 char *fieldname
= "";
12650 /* Allocate a new field list entry and link it in. */
12651 new_field
= xzalloc (sizeof (*new_field
));
12652 make_cleanup (xfree
, new_field
);
12654 gdb_assert (die
->tag
== DW_TAG_typedef
);
12656 fp
= &new_field
->field
;
12658 /* Get name of field. */
12659 fp
->name
= dwarf2_name (die
, cu
);
12660 if (fp
->name
== NULL
)
12663 fp
->type
= read_type_die (die
, cu
);
12665 new_field
->next
= fip
->typedef_field_list
;
12666 fip
->typedef_field_list
= new_field
;
12667 fip
->typedef_field_list_count
++;
12670 /* Create the vector of fields, and attach it to the type. */
12673 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12674 struct dwarf2_cu
*cu
)
12676 int nfields
= fip
->nfields
;
12678 /* Record the field count, allocate space for the array of fields,
12679 and create blank accessibility bitfields if necessary. */
12680 TYPE_NFIELDS (type
) = nfields
;
12681 TYPE_FIELDS (type
) = (struct field
*)
12682 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12683 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12685 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12687 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12689 TYPE_FIELD_PRIVATE_BITS (type
) =
12690 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12691 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12693 TYPE_FIELD_PROTECTED_BITS (type
) =
12694 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12695 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12697 TYPE_FIELD_IGNORE_BITS (type
) =
12698 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12699 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12702 /* If the type has baseclasses, allocate and clear a bit vector for
12703 TYPE_FIELD_VIRTUAL_BITS. */
12704 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12706 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12707 unsigned char *pointer
;
12709 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12710 pointer
= TYPE_ALLOC (type
, num_bytes
);
12711 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12712 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12713 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12716 /* Copy the saved-up fields into the field vector. Start from the head of
12717 the list, adding to the tail of the field array, so that they end up in
12718 the same order in the array in which they were added to the list. */
12719 while (nfields
-- > 0)
12721 struct nextfield
*fieldp
;
12725 fieldp
= fip
->fields
;
12726 fip
->fields
= fieldp
->next
;
12730 fieldp
= fip
->baseclasses
;
12731 fip
->baseclasses
= fieldp
->next
;
12734 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12735 switch (fieldp
->accessibility
)
12737 case DW_ACCESS_private
:
12738 if (cu
->language
!= language_ada
)
12739 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12742 case DW_ACCESS_protected
:
12743 if (cu
->language
!= language_ada
)
12744 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12747 case DW_ACCESS_public
:
12751 /* Unknown accessibility. Complain and treat it as public. */
12753 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12754 fieldp
->accessibility
);
12758 if (nfields
< fip
->nbaseclasses
)
12760 switch (fieldp
->virtuality
)
12762 case DW_VIRTUALITY_virtual
:
12763 case DW_VIRTUALITY_pure_virtual
:
12764 if (cu
->language
== language_ada
)
12765 error (_("unexpected virtuality in component of Ada type"));
12766 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12773 /* Return true if this member function is a constructor, false
12777 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12779 const char *fieldname
;
12780 const char *type_name
;
12783 if (die
->parent
== NULL
)
12786 if (die
->parent
->tag
!= DW_TAG_structure_type
12787 && die
->parent
->tag
!= DW_TAG_union_type
12788 && die
->parent
->tag
!= DW_TAG_class_type
)
12791 fieldname
= dwarf2_name (die
, cu
);
12792 type_name
= dwarf2_name (die
->parent
, cu
);
12793 if (fieldname
== NULL
|| type_name
== NULL
)
12796 len
= strlen (fieldname
);
12797 return (strncmp (fieldname
, type_name
, len
) == 0
12798 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12801 /* Add a member function to the proper fieldlist. */
12804 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12805 struct type
*type
, struct dwarf2_cu
*cu
)
12807 struct objfile
*objfile
= cu
->objfile
;
12808 struct attribute
*attr
;
12809 struct fnfieldlist
*flp
;
12811 struct fn_field
*fnp
;
12812 const char *fieldname
;
12813 struct nextfnfield
*new_fnfield
;
12814 struct type
*this_type
;
12815 enum dwarf_access_attribute accessibility
;
12817 if (cu
->language
== language_ada
)
12818 error (_("unexpected member function in Ada type"));
12820 /* Get name of member function. */
12821 fieldname
= dwarf2_name (die
, cu
);
12822 if (fieldname
== NULL
)
12825 /* Look up member function name in fieldlist. */
12826 for (i
= 0; i
< fip
->nfnfields
; i
++)
12828 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12832 /* Create new list element if necessary. */
12833 if (i
< fip
->nfnfields
)
12834 flp
= &fip
->fnfieldlists
[i
];
12837 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12839 fip
->fnfieldlists
= (struct fnfieldlist
*)
12840 xrealloc (fip
->fnfieldlists
,
12841 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12842 * sizeof (struct fnfieldlist
));
12843 if (fip
->nfnfields
== 0)
12844 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12846 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12847 flp
->name
= fieldname
;
12850 i
= fip
->nfnfields
++;
12853 /* Create a new member function field and chain it to the field list
12855 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12856 make_cleanup (xfree
, new_fnfield
);
12857 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12858 new_fnfield
->next
= flp
->head
;
12859 flp
->head
= new_fnfield
;
12862 /* Fill in the member function field info. */
12863 fnp
= &new_fnfield
->fnfield
;
12865 /* Delay processing of the physname until later. */
12866 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12868 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12873 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12874 fnp
->physname
= physname
? physname
: "";
12877 fnp
->type
= alloc_type (objfile
);
12878 this_type
= read_type_die (die
, cu
);
12879 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12881 int nparams
= TYPE_NFIELDS (this_type
);
12883 /* TYPE is the domain of this method, and THIS_TYPE is the type
12884 of the method itself (TYPE_CODE_METHOD). */
12885 smash_to_method_type (fnp
->type
, type
,
12886 TYPE_TARGET_TYPE (this_type
),
12887 TYPE_FIELDS (this_type
),
12888 TYPE_NFIELDS (this_type
),
12889 TYPE_VARARGS (this_type
));
12891 /* Handle static member functions.
12892 Dwarf2 has no clean way to discern C++ static and non-static
12893 member functions. G++ helps GDB by marking the first
12894 parameter for non-static member functions (which is the this
12895 pointer) as artificial. We obtain this information from
12896 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12897 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12898 fnp
->voffset
= VOFFSET_STATIC
;
12901 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12902 dwarf2_full_name (fieldname
, die
, cu
));
12904 /* Get fcontext from DW_AT_containing_type if present. */
12905 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12906 fnp
->fcontext
= die_containing_type (die
, cu
);
12908 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12909 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12911 /* Get accessibility. */
12912 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12914 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12916 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12917 switch (accessibility
)
12919 case DW_ACCESS_private
:
12920 fnp
->is_private
= 1;
12922 case DW_ACCESS_protected
:
12923 fnp
->is_protected
= 1;
12927 /* Check for artificial methods. */
12928 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12929 if (attr
&& DW_UNSND (attr
) != 0)
12930 fnp
->is_artificial
= 1;
12932 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12934 /* Get index in virtual function table if it is a virtual member
12935 function. For older versions of GCC, this is an offset in the
12936 appropriate virtual table, as specified by DW_AT_containing_type.
12937 For everyone else, it is an expression to be evaluated relative
12938 to the object address. */
12940 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12943 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12945 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12947 /* Old-style GCC. */
12948 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12950 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12951 || (DW_BLOCK (attr
)->size
> 1
12952 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12953 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12955 struct dwarf_block blk
;
12958 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12960 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12961 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12962 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12963 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12964 dwarf2_complex_location_expr_complaint ();
12966 fnp
->voffset
/= cu
->header
.addr_size
;
12970 dwarf2_complex_location_expr_complaint ();
12972 if (!fnp
->fcontext
)
12974 /* If there is no `this' field and no DW_AT_containing_type,
12975 we cannot actually find a base class context for the
12977 if (TYPE_NFIELDS (this_type
) == 0
12978 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12980 complaint (&symfile_complaints
,
12981 _("cannot determine context for virtual member "
12982 "function \"%s\" (offset %d)"),
12983 fieldname
, die
->offset
.sect_off
);
12988 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12992 else if (attr_form_is_section_offset (attr
))
12994 dwarf2_complex_location_expr_complaint ();
12998 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13004 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13005 if (attr
&& DW_UNSND (attr
))
13007 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13008 complaint (&symfile_complaints
,
13009 _("Member function \"%s\" (offset %d) is virtual "
13010 "but the vtable offset is not specified"),
13011 fieldname
, die
->offset
.sect_off
);
13012 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13013 TYPE_CPLUS_DYNAMIC (type
) = 1;
13018 /* Create the vector of member function fields, and attach it to the type. */
13021 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13022 struct dwarf2_cu
*cu
)
13024 struct fnfieldlist
*flp
;
13027 if (cu
->language
== language_ada
)
13028 error (_("unexpected member functions in Ada type"));
13030 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13031 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13032 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13034 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13036 struct nextfnfield
*nfp
= flp
->head
;
13037 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13040 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13041 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13042 fn_flp
->fn_fields
= (struct fn_field
*)
13043 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13044 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13045 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13048 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13051 /* Returns non-zero if NAME is the name of a vtable member in CU's
13052 language, zero otherwise. */
13054 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13056 static const char vptr
[] = "_vptr";
13057 static const char vtable
[] = "vtable";
13059 /* Look for the C++ and Java forms of the vtable. */
13060 if ((cu
->language
== language_java
13061 && startswith (name
, vtable
))
13062 || (startswith (name
, vptr
)
13063 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13069 /* GCC outputs unnamed structures that are really pointers to member
13070 functions, with the ABI-specified layout. If TYPE describes
13071 such a structure, smash it into a member function type.
13073 GCC shouldn't do this; it should just output pointer to member DIEs.
13074 This is GCC PR debug/28767. */
13077 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13079 struct type
*pfn_type
, *self_type
, *new_type
;
13081 /* Check for a structure with no name and two children. */
13082 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13085 /* Check for __pfn and __delta members. */
13086 if (TYPE_FIELD_NAME (type
, 0) == NULL
13087 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13088 || TYPE_FIELD_NAME (type
, 1) == NULL
13089 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13092 /* Find the type of the method. */
13093 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13094 if (pfn_type
== NULL
13095 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13096 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13099 /* Look for the "this" argument. */
13100 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13101 if (TYPE_NFIELDS (pfn_type
) == 0
13102 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13103 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13106 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13107 new_type
= alloc_type (objfile
);
13108 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13109 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13110 TYPE_VARARGS (pfn_type
));
13111 smash_to_methodptr_type (type
, new_type
);
13114 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13118 producer_is_icc (struct dwarf2_cu
*cu
)
13120 if (!cu
->checked_producer
)
13121 check_producer (cu
);
13123 return cu
->producer_is_icc
;
13126 /* Called when we find the DIE that starts a structure or union scope
13127 (definition) to create a type for the structure or union. Fill in
13128 the type's name and general properties; the members will not be
13129 processed until process_structure_scope. A symbol table entry for
13130 the type will also not be done until process_structure_scope (assuming
13131 the type has a name).
13133 NOTE: we need to call these functions regardless of whether or not the
13134 DIE has a DW_AT_name attribute, since it might be an anonymous
13135 structure or union. This gets the type entered into our set of
13136 user defined types. */
13138 static struct type
*
13139 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13141 struct objfile
*objfile
= cu
->objfile
;
13143 struct attribute
*attr
;
13146 /* If the definition of this type lives in .debug_types, read that type.
13147 Don't follow DW_AT_specification though, that will take us back up
13148 the chain and we want to go down. */
13149 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13152 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13154 /* The type's CU may not be the same as CU.
13155 Ensure TYPE is recorded with CU in die_type_hash. */
13156 return set_die_type (die
, type
, cu
);
13159 type
= alloc_type (objfile
);
13160 INIT_CPLUS_SPECIFIC (type
);
13162 name
= dwarf2_name (die
, cu
);
13165 if (cu
->language
== language_cplus
13166 || cu
->language
== language_java
13167 || cu
->language
== language_d
)
13169 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13171 /* dwarf2_full_name might have already finished building the DIE's
13172 type. If so, there is no need to continue. */
13173 if (get_die_type (die
, cu
) != NULL
)
13174 return get_die_type (die
, cu
);
13176 TYPE_TAG_NAME (type
) = full_name
;
13177 if (die
->tag
== DW_TAG_structure_type
13178 || die
->tag
== DW_TAG_class_type
)
13179 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13183 /* The name is already allocated along with this objfile, so
13184 we don't need to duplicate it for the type. */
13185 TYPE_TAG_NAME (type
) = name
;
13186 if (die
->tag
== DW_TAG_class_type
)
13187 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13191 if (die
->tag
== DW_TAG_structure_type
)
13193 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13195 else if (die
->tag
== DW_TAG_union_type
)
13197 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13201 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13204 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13205 TYPE_DECLARED_CLASS (type
) = 1;
13207 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13210 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13214 TYPE_LENGTH (type
) = 0;
13217 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13219 /* ICC does not output the required DW_AT_declaration
13220 on incomplete types, but gives them a size of zero. */
13221 TYPE_STUB (type
) = 1;
13224 TYPE_STUB_SUPPORTED (type
) = 1;
13226 if (die_is_declaration (die
, cu
))
13227 TYPE_STUB (type
) = 1;
13228 else if (attr
== NULL
&& die
->child
== NULL
13229 && producer_is_realview (cu
->producer
))
13230 /* RealView does not output the required DW_AT_declaration
13231 on incomplete types. */
13232 TYPE_STUB (type
) = 1;
13234 /* We need to add the type field to the die immediately so we don't
13235 infinitely recurse when dealing with pointers to the structure
13236 type within the structure itself. */
13237 set_die_type (die
, type
, cu
);
13239 /* set_die_type should be already done. */
13240 set_descriptive_type (type
, die
, cu
);
13245 /* Finish creating a structure or union type, including filling in
13246 its members and creating a symbol for it. */
13249 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13251 struct objfile
*objfile
= cu
->objfile
;
13252 struct die_info
*child_die
;
13255 type
= get_die_type (die
, cu
);
13257 type
= read_structure_type (die
, cu
);
13259 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13261 struct field_info fi
;
13262 VEC (symbolp
) *template_args
= NULL
;
13263 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13265 memset (&fi
, 0, sizeof (struct field_info
));
13267 child_die
= die
->child
;
13269 while (child_die
&& child_die
->tag
)
13271 if (child_die
->tag
== DW_TAG_member
13272 || child_die
->tag
== DW_TAG_variable
)
13274 /* NOTE: carlton/2002-11-05: A C++ static data member
13275 should be a DW_TAG_member that is a declaration, but
13276 all versions of G++ as of this writing (so through at
13277 least 3.2.1) incorrectly generate DW_TAG_variable
13278 tags for them instead. */
13279 dwarf2_add_field (&fi
, child_die
, cu
);
13281 else if (child_die
->tag
== DW_TAG_subprogram
)
13283 /* C++ member function. */
13284 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13286 else if (child_die
->tag
== DW_TAG_inheritance
)
13288 /* C++ base class field. */
13289 dwarf2_add_field (&fi
, child_die
, cu
);
13291 else if (child_die
->tag
== DW_TAG_typedef
)
13292 dwarf2_add_typedef (&fi
, child_die
, cu
);
13293 else if (child_die
->tag
== DW_TAG_template_type_param
13294 || child_die
->tag
== DW_TAG_template_value_param
)
13296 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13299 VEC_safe_push (symbolp
, template_args
, arg
);
13302 child_die
= sibling_die (child_die
);
13305 /* Attach template arguments to type. */
13306 if (! VEC_empty (symbolp
, template_args
))
13308 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13309 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13310 = VEC_length (symbolp
, template_args
);
13311 TYPE_TEMPLATE_ARGUMENTS (type
)
13312 = obstack_alloc (&objfile
->objfile_obstack
,
13313 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13314 * sizeof (struct symbol
*)));
13315 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13316 VEC_address (symbolp
, template_args
),
13317 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13318 * sizeof (struct symbol
*)));
13319 VEC_free (symbolp
, template_args
);
13322 /* Attach fields and member functions to the type. */
13324 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13327 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13329 /* Get the type which refers to the base class (possibly this
13330 class itself) which contains the vtable pointer for the current
13331 class from the DW_AT_containing_type attribute. This use of
13332 DW_AT_containing_type is a GNU extension. */
13334 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13336 struct type
*t
= die_containing_type (die
, cu
);
13338 set_type_vptr_basetype (type
, t
);
13343 /* Our own class provides vtbl ptr. */
13344 for (i
= TYPE_NFIELDS (t
) - 1;
13345 i
>= TYPE_N_BASECLASSES (t
);
13348 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13350 if (is_vtable_name (fieldname
, cu
))
13352 set_type_vptr_fieldno (type
, i
);
13357 /* Complain if virtual function table field not found. */
13358 if (i
< TYPE_N_BASECLASSES (t
))
13359 complaint (&symfile_complaints
,
13360 _("virtual function table pointer "
13361 "not found when defining class '%s'"),
13362 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13367 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13370 else if (cu
->producer
13371 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13373 /* The IBM XLC compiler does not provide direct indication
13374 of the containing type, but the vtable pointer is
13375 always named __vfp. */
13379 for (i
= TYPE_NFIELDS (type
) - 1;
13380 i
>= TYPE_N_BASECLASSES (type
);
13383 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13385 set_type_vptr_fieldno (type
, i
);
13386 set_type_vptr_basetype (type
, type
);
13393 /* Copy fi.typedef_field_list linked list elements content into the
13394 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13395 if (fi
.typedef_field_list
)
13397 int i
= fi
.typedef_field_list_count
;
13399 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13400 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13401 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13402 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13404 /* Reverse the list order to keep the debug info elements order. */
13407 struct typedef_field
*dest
, *src
;
13409 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13410 src
= &fi
.typedef_field_list
->field
;
13411 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13416 do_cleanups (back_to
);
13418 if (HAVE_CPLUS_STRUCT (type
))
13419 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13422 quirk_gcc_member_function_pointer (type
, objfile
);
13424 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13425 snapshots) has been known to create a die giving a declaration
13426 for a class that has, as a child, a die giving a definition for a
13427 nested class. So we have to process our children even if the
13428 current die is a declaration. Normally, of course, a declaration
13429 won't have any children at all. */
13431 child_die
= die
->child
;
13433 while (child_die
!= NULL
&& child_die
->tag
)
13435 if (child_die
->tag
== DW_TAG_member
13436 || child_die
->tag
== DW_TAG_variable
13437 || child_die
->tag
== DW_TAG_inheritance
13438 || child_die
->tag
== DW_TAG_template_value_param
13439 || child_die
->tag
== DW_TAG_template_type_param
)
13444 process_die (child_die
, cu
);
13446 child_die
= sibling_die (child_die
);
13449 /* Do not consider external references. According to the DWARF standard,
13450 these DIEs are identified by the fact that they have no byte_size
13451 attribute, and a declaration attribute. */
13452 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13453 || !die_is_declaration (die
, cu
))
13454 new_symbol (die
, type
, cu
);
13457 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13458 update TYPE using some information only available in DIE's children. */
13461 update_enumeration_type_from_children (struct die_info
*die
,
13463 struct dwarf2_cu
*cu
)
13465 struct obstack obstack
;
13466 struct die_info
*child_die
;
13467 int unsigned_enum
= 1;
13470 struct cleanup
*old_chain
;
13472 obstack_init (&obstack
);
13473 old_chain
= make_cleanup_obstack_free (&obstack
);
13475 for (child_die
= die
->child
;
13476 child_die
!= NULL
&& child_die
->tag
;
13477 child_die
= sibling_die (child_die
))
13479 struct attribute
*attr
;
13481 const gdb_byte
*bytes
;
13482 struct dwarf2_locexpr_baton
*baton
;
13485 if (child_die
->tag
!= DW_TAG_enumerator
)
13488 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13492 name
= dwarf2_name (child_die
, cu
);
13494 name
= "<anonymous enumerator>";
13496 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13497 &value
, &bytes
, &baton
);
13503 else if ((mask
& value
) != 0)
13508 /* If we already know that the enum type is neither unsigned, nor
13509 a flag type, no need to look at the rest of the enumerates. */
13510 if (!unsigned_enum
&& !flag_enum
)
13515 TYPE_UNSIGNED (type
) = 1;
13517 TYPE_FLAG_ENUM (type
) = 1;
13519 do_cleanups (old_chain
);
13522 /* Given a DW_AT_enumeration_type die, set its type. We do not
13523 complete the type's fields yet, or create any symbols. */
13525 static struct type
*
13526 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13528 struct objfile
*objfile
= cu
->objfile
;
13530 struct attribute
*attr
;
13533 /* If the definition of this type lives in .debug_types, read that type.
13534 Don't follow DW_AT_specification though, that will take us back up
13535 the chain and we want to go down. */
13536 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13539 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13541 /* The type's CU may not be the same as CU.
13542 Ensure TYPE is recorded with CU in die_type_hash. */
13543 return set_die_type (die
, type
, cu
);
13546 type
= alloc_type (objfile
);
13548 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13549 name
= dwarf2_full_name (NULL
, die
, cu
);
13551 TYPE_TAG_NAME (type
) = name
;
13553 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13556 struct type
*underlying_type
= die_type (die
, cu
);
13558 TYPE_TARGET_TYPE (type
) = underlying_type
;
13561 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13564 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13568 TYPE_LENGTH (type
) = 0;
13571 /* The enumeration DIE can be incomplete. In Ada, any type can be
13572 declared as private in the package spec, and then defined only
13573 inside the package body. Such types are known as Taft Amendment
13574 Types. When another package uses such a type, an incomplete DIE
13575 may be generated by the compiler. */
13576 if (die_is_declaration (die
, cu
))
13577 TYPE_STUB (type
) = 1;
13579 /* Finish the creation of this type by using the enum's children.
13580 We must call this even when the underlying type has been provided
13581 so that we can determine if we're looking at a "flag" enum. */
13582 update_enumeration_type_from_children (die
, type
, cu
);
13584 /* If this type has an underlying type that is not a stub, then we
13585 may use its attributes. We always use the "unsigned" attribute
13586 in this situation, because ordinarily we guess whether the type
13587 is unsigned -- but the guess can be wrong and the underlying type
13588 can tell us the reality. However, we defer to a local size
13589 attribute if one exists, because this lets the compiler override
13590 the underlying type if needed. */
13591 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13593 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13594 if (TYPE_LENGTH (type
) == 0)
13595 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13598 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13600 return set_die_type (die
, type
, cu
);
13603 /* Given a pointer to a die which begins an enumeration, process all
13604 the dies that define the members of the enumeration, and create the
13605 symbol for the enumeration type.
13607 NOTE: We reverse the order of the element list. */
13610 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13612 struct type
*this_type
;
13614 this_type
= get_die_type (die
, cu
);
13615 if (this_type
== NULL
)
13616 this_type
= read_enumeration_type (die
, cu
);
13618 if (die
->child
!= NULL
)
13620 struct die_info
*child_die
;
13621 struct symbol
*sym
;
13622 struct field
*fields
= NULL
;
13623 int num_fields
= 0;
13626 child_die
= die
->child
;
13627 while (child_die
&& child_die
->tag
)
13629 if (child_die
->tag
!= DW_TAG_enumerator
)
13631 process_die (child_die
, cu
);
13635 name
= dwarf2_name (child_die
, cu
);
13638 sym
= new_symbol (child_die
, this_type
, cu
);
13640 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13642 fields
= (struct field
*)
13644 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13645 * sizeof (struct field
));
13648 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13649 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13650 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13651 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13657 child_die
= sibling_die (child_die
);
13662 TYPE_NFIELDS (this_type
) = num_fields
;
13663 TYPE_FIELDS (this_type
) = (struct field
*)
13664 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13665 memcpy (TYPE_FIELDS (this_type
), fields
,
13666 sizeof (struct field
) * num_fields
);
13671 /* If we are reading an enum from a .debug_types unit, and the enum
13672 is a declaration, and the enum is not the signatured type in the
13673 unit, then we do not want to add a symbol for it. Adding a
13674 symbol would in some cases obscure the true definition of the
13675 enum, giving users an incomplete type when the definition is
13676 actually available. Note that we do not want to do this for all
13677 enums which are just declarations, because C++0x allows forward
13678 enum declarations. */
13679 if (cu
->per_cu
->is_debug_types
13680 && die_is_declaration (die
, cu
))
13682 struct signatured_type
*sig_type
;
13684 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13685 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13686 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13690 new_symbol (die
, this_type
, cu
);
13693 /* Extract all information from a DW_TAG_array_type DIE and put it in
13694 the DIE's type field. For now, this only handles one dimensional
13697 static struct type
*
13698 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13700 struct objfile
*objfile
= cu
->objfile
;
13701 struct die_info
*child_die
;
13703 struct type
*element_type
, *range_type
, *index_type
;
13704 struct type
**range_types
= NULL
;
13705 struct attribute
*attr
;
13707 struct cleanup
*back_to
;
13709 unsigned int bit_stride
= 0;
13711 element_type
= die_type (die
, cu
);
13713 /* The die_type call above may have already set the type for this DIE. */
13714 type
= get_die_type (die
, cu
);
13718 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13720 bit_stride
= DW_UNSND (attr
) * 8;
13722 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13724 bit_stride
= DW_UNSND (attr
);
13726 /* Irix 6.2 native cc creates array types without children for
13727 arrays with unspecified length. */
13728 if (die
->child
== NULL
)
13730 index_type
= objfile_type (objfile
)->builtin_int
;
13731 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13732 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13734 return set_die_type (die
, type
, cu
);
13737 back_to
= make_cleanup (null_cleanup
, NULL
);
13738 child_die
= die
->child
;
13739 while (child_die
&& child_die
->tag
)
13741 if (child_die
->tag
== DW_TAG_subrange_type
)
13743 struct type
*child_type
= read_type_die (child_die
, cu
);
13745 if (child_type
!= NULL
)
13747 /* The range type was succesfully read. Save it for the
13748 array type creation. */
13749 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13751 range_types
= (struct type
**)
13752 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13753 * sizeof (struct type
*));
13755 make_cleanup (free_current_contents
, &range_types
);
13757 range_types
[ndim
++] = child_type
;
13760 child_die
= sibling_die (child_die
);
13763 /* Dwarf2 dimensions are output from left to right, create the
13764 necessary array types in backwards order. */
13766 type
= element_type
;
13768 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13773 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13779 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13783 /* Understand Dwarf2 support for vector types (like they occur on
13784 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13785 array type. This is not part of the Dwarf2/3 standard yet, but a
13786 custom vendor extension. The main difference between a regular
13787 array and the vector variant is that vectors are passed by value
13789 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13791 make_vector_type (type
);
13793 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13794 implementation may choose to implement triple vectors using this
13796 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13799 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13800 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13802 complaint (&symfile_complaints
,
13803 _("DW_AT_byte_size for array type smaller "
13804 "than the total size of elements"));
13807 name
= dwarf2_name (die
, cu
);
13809 TYPE_NAME (type
) = name
;
13811 /* Install the type in the die. */
13812 set_die_type (die
, type
, cu
);
13814 /* set_die_type should be already done. */
13815 set_descriptive_type (type
, die
, cu
);
13817 do_cleanups (back_to
);
13822 static enum dwarf_array_dim_ordering
13823 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13825 struct attribute
*attr
;
13827 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13830 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13832 /* GNU F77 is a special case, as at 08/2004 array type info is the
13833 opposite order to the dwarf2 specification, but data is still
13834 laid out as per normal fortran.
13836 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13837 version checking. */
13839 if (cu
->language
== language_fortran
13840 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13842 return DW_ORD_row_major
;
13845 switch (cu
->language_defn
->la_array_ordering
)
13847 case array_column_major
:
13848 return DW_ORD_col_major
;
13849 case array_row_major
:
13851 return DW_ORD_row_major
;
13855 /* Extract all information from a DW_TAG_set_type DIE and put it in
13856 the DIE's type field. */
13858 static struct type
*
13859 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13861 struct type
*domain_type
, *set_type
;
13862 struct attribute
*attr
;
13864 domain_type
= die_type (die
, cu
);
13866 /* The die_type call above may have already set the type for this DIE. */
13867 set_type
= get_die_type (die
, cu
);
13871 set_type
= create_set_type (NULL
, domain_type
);
13873 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13875 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13877 return set_die_type (die
, set_type
, cu
);
13880 /* A helper for read_common_block that creates a locexpr baton.
13881 SYM is the symbol which we are marking as computed.
13882 COMMON_DIE is the DIE for the common block.
13883 COMMON_LOC is the location expression attribute for the common
13885 MEMBER_LOC is the location expression attribute for the particular
13886 member of the common block that we are processing.
13887 CU is the CU from which the above come. */
13890 mark_common_block_symbol_computed (struct symbol
*sym
,
13891 struct die_info
*common_die
,
13892 struct attribute
*common_loc
,
13893 struct attribute
*member_loc
,
13894 struct dwarf2_cu
*cu
)
13896 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13897 struct dwarf2_locexpr_baton
*baton
;
13899 unsigned int cu_off
;
13900 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13901 LONGEST offset
= 0;
13903 gdb_assert (common_loc
&& member_loc
);
13904 gdb_assert (attr_form_is_block (common_loc
));
13905 gdb_assert (attr_form_is_block (member_loc
)
13906 || attr_form_is_constant (member_loc
));
13908 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13909 sizeof (struct dwarf2_locexpr_baton
));
13910 baton
->per_cu
= cu
->per_cu
;
13911 gdb_assert (baton
->per_cu
);
13913 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13915 if (attr_form_is_constant (member_loc
))
13917 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13918 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13921 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13923 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13926 *ptr
++ = DW_OP_call4
;
13927 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13928 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13931 if (attr_form_is_constant (member_loc
))
13933 *ptr
++ = DW_OP_addr
;
13934 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13935 ptr
+= cu
->header
.addr_size
;
13939 /* We have to copy the data here, because DW_OP_call4 will only
13940 use a DW_AT_location attribute. */
13941 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13942 ptr
+= DW_BLOCK (member_loc
)->size
;
13945 *ptr
++ = DW_OP_plus
;
13946 gdb_assert (ptr
- baton
->data
== baton
->size
);
13948 SYMBOL_LOCATION_BATON (sym
) = baton
;
13949 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13952 /* Create appropriate locally-scoped variables for all the
13953 DW_TAG_common_block entries. Also create a struct common_block
13954 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13955 is used to sepate the common blocks name namespace from regular
13959 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13961 struct attribute
*attr
;
13963 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13966 /* Support the .debug_loc offsets. */
13967 if (attr_form_is_block (attr
))
13971 else if (attr_form_is_section_offset (attr
))
13973 dwarf2_complex_location_expr_complaint ();
13978 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13979 "common block member");
13984 if (die
->child
!= NULL
)
13986 struct objfile
*objfile
= cu
->objfile
;
13987 struct die_info
*child_die
;
13988 size_t n_entries
= 0, size
;
13989 struct common_block
*common_block
;
13990 struct symbol
*sym
;
13992 for (child_die
= die
->child
;
13993 child_die
&& child_die
->tag
;
13994 child_die
= sibling_die (child_die
))
13997 size
= (sizeof (struct common_block
)
13998 + (n_entries
- 1) * sizeof (struct symbol
*));
13999 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
14000 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14001 common_block
->n_entries
= 0;
14003 for (child_die
= die
->child
;
14004 child_die
&& child_die
->tag
;
14005 child_die
= sibling_die (child_die
))
14007 /* Create the symbol in the DW_TAG_common_block block in the current
14009 sym
= new_symbol (child_die
, NULL
, cu
);
14012 struct attribute
*member_loc
;
14014 common_block
->contents
[common_block
->n_entries
++] = sym
;
14016 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14020 /* GDB has handled this for a long time, but it is
14021 not specified by DWARF. It seems to have been
14022 emitted by gfortran at least as recently as:
14023 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14024 complaint (&symfile_complaints
,
14025 _("Variable in common block has "
14026 "DW_AT_data_member_location "
14027 "- DIE at 0x%x [in module %s]"),
14028 child_die
->offset
.sect_off
,
14029 objfile_name (cu
->objfile
));
14031 if (attr_form_is_section_offset (member_loc
))
14032 dwarf2_complex_location_expr_complaint ();
14033 else if (attr_form_is_constant (member_loc
)
14034 || attr_form_is_block (member_loc
))
14037 mark_common_block_symbol_computed (sym
, die
, attr
,
14041 dwarf2_complex_location_expr_complaint ();
14046 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14047 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14051 /* Create a type for a C++ namespace. */
14053 static struct type
*
14054 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14056 struct objfile
*objfile
= cu
->objfile
;
14057 const char *previous_prefix
, *name
;
14061 /* For extensions, reuse the type of the original namespace. */
14062 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14064 struct die_info
*ext_die
;
14065 struct dwarf2_cu
*ext_cu
= cu
;
14067 ext_die
= dwarf2_extension (die
, &ext_cu
);
14068 type
= read_type_die (ext_die
, ext_cu
);
14070 /* EXT_CU may not be the same as CU.
14071 Ensure TYPE is recorded with CU in die_type_hash. */
14072 return set_die_type (die
, type
, cu
);
14075 name
= namespace_name (die
, &is_anonymous
, cu
);
14077 /* Now build the name of the current namespace. */
14079 previous_prefix
= determine_prefix (die
, cu
);
14080 if (previous_prefix
[0] != '\0')
14081 name
= typename_concat (&objfile
->objfile_obstack
,
14082 previous_prefix
, name
, 0, cu
);
14084 /* Create the type. */
14085 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14087 TYPE_NAME (type
) = name
;
14088 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14090 return set_die_type (die
, type
, cu
);
14093 /* Read a namespace scope. */
14096 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14098 struct objfile
*objfile
= cu
->objfile
;
14101 /* Add a symbol associated to this if we haven't seen the namespace
14102 before. Also, add a using directive if it's an anonymous
14105 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14109 type
= read_type_die (die
, cu
);
14110 new_symbol (die
, type
, cu
);
14112 namespace_name (die
, &is_anonymous
, cu
);
14115 const char *previous_prefix
= determine_prefix (die
, cu
);
14117 add_using_directive (using_directives (cu
->language
),
14118 previous_prefix
, TYPE_NAME (type
), NULL
,
14119 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14123 if (die
->child
!= NULL
)
14125 struct die_info
*child_die
= die
->child
;
14127 while (child_die
&& child_die
->tag
)
14129 process_die (child_die
, cu
);
14130 child_die
= sibling_die (child_die
);
14135 /* Read a Fortran module as type. This DIE can be only a declaration used for
14136 imported module. Still we need that type as local Fortran "use ... only"
14137 declaration imports depend on the created type in determine_prefix. */
14139 static struct type
*
14140 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14142 struct objfile
*objfile
= cu
->objfile
;
14143 const char *module_name
;
14146 module_name
= dwarf2_name (die
, cu
);
14148 complaint (&symfile_complaints
,
14149 _("DW_TAG_module has no name, offset 0x%x"),
14150 die
->offset
.sect_off
);
14151 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14153 /* determine_prefix uses TYPE_TAG_NAME. */
14154 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14156 return set_die_type (die
, type
, cu
);
14159 /* Read a Fortran module. */
14162 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14164 struct die_info
*child_die
= die
->child
;
14167 type
= read_type_die (die
, cu
);
14168 new_symbol (die
, type
, cu
);
14170 while (child_die
&& child_die
->tag
)
14172 process_die (child_die
, cu
);
14173 child_die
= sibling_die (child_die
);
14177 /* Return the name of the namespace represented by DIE. Set
14178 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14181 static const char *
14182 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14184 struct die_info
*current_die
;
14185 const char *name
= NULL
;
14187 /* Loop through the extensions until we find a name. */
14189 for (current_die
= die
;
14190 current_die
!= NULL
;
14191 current_die
= dwarf2_extension (die
, &cu
))
14193 /* We don't use dwarf2_name here so that we can detect the absence
14194 of a name -> anonymous namespace. */
14195 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14198 name
= DW_STRING (attr
);
14203 /* Is it an anonymous namespace? */
14205 *is_anonymous
= (name
== NULL
);
14207 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14212 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14213 the user defined type vector. */
14215 static struct type
*
14216 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14218 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14219 struct comp_unit_head
*cu_header
= &cu
->header
;
14221 struct attribute
*attr_byte_size
;
14222 struct attribute
*attr_address_class
;
14223 int byte_size
, addr_class
;
14224 struct type
*target_type
;
14226 target_type
= die_type (die
, cu
);
14228 /* The die_type call above may have already set the type for this DIE. */
14229 type
= get_die_type (die
, cu
);
14233 type
= lookup_pointer_type (target_type
);
14235 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14236 if (attr_byte_size
)
14237 byte_size
= DW_UNSND (attr_byte_size
);
14239 byte_size
= cu_header
->addr_size
;
14241 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14242 if (attr_address_class
)
14243 addr_class
= DW_UNSND (attr_address_class
);
14245 addr_class
= DW_ADDR_none
;
14247 /* If the pointer size or address class is different than the
14248 default, create a type variant marked as such and set the
14249 length accordingly. */
14250 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14252 if (gdbarch_address_class_type_flags_p (gdbarch
))
14256 type_flags
= gdbarch_address_class_type_flags
14257 (gdbarch
, byte_size
, addr_class
);
14258 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14260 type
= make_type_with_address_space (type
, type_flags
);
14262 else if (TYPE_LENGTH (type
) != byte_size
)
14264 complaint (&symfile_complaints
,
14265 _("invalid pointer size %d"), byte_size
);
14269 /* Should we also complain about unhandled address classes? */
14273 TYPE_LENGTH (type
) = byte_size
;
14274 return set_die_type (die
, type
, cu
);
14277 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14278 the user defined type vector. */
14280 static struct type
*
14281 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14284 struct type
*to_type
;
14285 struct type
*domain
;
14287 to_type
= die_type (die
, cu
);
14288 domain
= die_containing_type (die
, cu
);
14290 /* The calls above may have already set the type for this DIE. */
14291 type
= get_die_type (die
, cu
);
14295 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14296 type
= lookup_methodptr_type (to_type
);
14297 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14299 struct type
*new_type
= alloc_type (cu
->objfile
);
14301 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14302 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14303 TYPE_VARARGS (to_type
));
14304 type
= lookup_methodptr_type (new_type
);
14307 type
= lookup_memberptr_type (to_type
, domain
);
14309 return set_die_type (die
, type
, cu
);
14312 /* Extract all information from a DW_TAG_reference_type DIE and add to
14313 the user defined type vector. */
14315 static struct type
*
14316 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14318 struct comp_unit_head
*cu_header
= &cu
->header
;
14319 struct type
*type
, *target_type
;
14320 struct attribute
*attr
;
14322 target_type
= die_type (die
, cu
);
14324 /* The die_type call above may have already set the type for this DIE. */
14325 type
= get_die_type (die
, cu
);
14329 type
= lookup_reference_type (target_type
);
14330 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14333 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14337 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14339 return set_die_type (die
, type
, cu
);
14342 /* Add the given cv-qualifiers to the element type of the array. GCC
14343 outputs DWARF type qualifiers that apply to an array, not the
14344 element type. But GDB relies on the array element type to carry
14345 the cv-qualifiers. This mimics section 6.7.3 of the C99
14348 static struct type
*
14349 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14350 struct type
*base_type
, int cnst
, int voltl
)
14352 struct type
*el_type
, *inner_array
;
14354 base_type
= copy_type (base_type
);
14355 inner_array
= base_type
;
14357 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14359 TYPE_TARGET_TYPE (inner_array
) =
14360 copy_type (TYPE_TARGET_TYPE (inner_array
));
14361 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14364 el_type
= TYPE_TARGET_TYPE (inner_array
);
14365 cnst
|= TYPE_CONST (el_type
);
14366 voltl
|= TYPE_VOLATILE (el_type
);
14367 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14369 return set_die_type (die
, base_type
, cu
);
14372 static struct type
*
14373 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14375 struct type
*base_type
, *cv_type
;
14377 base_type
= die_type (die
, cu
);
14379 /* The die_type call above may have already set the type for this DIE. */
14380 cv_type
= get_die_type (die
, cu
);
14384 /* In case the const qualifier is applied to an array type, the element type
14385 is so qualified, not the array type (section 6.7.3 of C99). */
14386 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14387 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14389 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14390 return set_die_type (die
, cv_type
, cu
);
14393 static struct type
*
14394 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14396 struct type
*base_type
, *cv_type
;
14398 base_type
= die_type (die
, cu
);
14400 /* The die_type call above may have already set the type for this DIE. */
14401 cv_type
= get_die_type (die
, cu
);
14405 /* In case the volatile qualifier is applied to an array type, the
14406 element type is so qualified, not the array type (section 6.7.3
14408 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14409 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14411 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14412 return set_die_type (die
, cv_type
, cu
);
14415 /* Handle DW_TAG_restrict_type. */
14417 static struct type
*
14418 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14420 struct type
*base_type
, *cv_type
;
14422 base_type
= die_type (die
, cu
);
14424 /* The die_type call above may have already set the type for this DIE. */
14425 cv_type
= get_die_type (die
, cu
);
14429 cv_type
= make_restrict_type (base_type
);
14430 return set_die_type (die
, cv_type
, cu
);
14433 /* Handle DW_TAG_atomic_type. */
14435 static struct type
*
14436 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14438 struct type
*base_type
, *cv_type
;
14440 base_type
= die_type (die
, cu
);
14442 /* The die_type call above may have already set the type for this DIE. */
14443 cv_type
= get_die_type (die
, cu
);
14447 cv_type
= make_atomic_type (base_type
);
14448 return set_die_type (die
, cv_type
, cu
);
14451 /* Extract all information from a DW_TAG_string_type DIE and add to
14452 the user defined type vector. It isn't really a user defined type,
14453 but it behaves like one, with other DIE's using an AT_user_def_type
14454 attribute to reference it. */
14456 static struct type
*
14457 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14459 struct objfile
*objfile
= cu
->objfile
;
14460 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14461 struct type
*type
, *range_type
, *index_type
, *char_type
;
14462 struct attribute
*attr
;
14463 unsigned int length
;
14465 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14468 length
= DW_UNSND (attr
);
14472 /* Check for the DW_AT_byte_size attribute. */
14473 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14476 length
= DW_UNSND (attr
);
14484 index_type
= objfile_type (objfile
)->builtin_int
;
14485 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14486 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14487 type
= create_string_type (NULL
, char_type
, range_type
);
14489 return set_die_type (die
, type
, cu
);
14492 /* Assuming that DIE corresponds to a function, returns nonzero
14493 if the function is prototyped. */
14496 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14498 struct attribute
*attr
;
14500 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14501 if (attr
&& (DW_UNSND (attr
) != 0))
14504 /* The DWARF standard implies that the DW_AT_prototyped attribute
14505 is only meaninful for C, but the concept also extends to other
14506 languages that allow unprototyped functions (Eg: Objective C).
14507 For all other languages, assume that functions are always
14509 if (cu
->language
!= language_c
14510 && cu
->language
!= language_objc
14511 && cu
->language
!= language_opencl
)
14514 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14515 prototyped and unprototyped functions; default to prototyped,
14516 since that is more common in modern code (and RealView warns
14517 about unprototyped functions). */
14518 if (producer_is_realview (cu
->producer
))
14524 /* Handle DIES due to C code like:
14528 int (*funcp)(int a, long l);
14532 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14534 static struct type
*
14535 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14537 struct objfile
*objfile
= cu
->objfile
;
14538 struct type
*type
; /* Type that this function returns. */
14539 struct type
*ftype
; /* Function that returns above type. */
14540 struct attribute
*attr
;
14542 type
= die_type (die
, cu
);
14544 /* The die_type call above may have already set the type for this DIE. */
14545 ftype
= get_die_type (die
, cu
);
14549 ftype
= lookup_function_type (type
);
14551 if (prototyped_function_p (die
, cu
))
14552 TYPE_PROTOTYPED (ftype
) = 1;
14554 /* Store the calling convention in the type if it's available in
14555 the subroutine die. Otherwise set the calling convention to
14556 the default value DW_CC_normal. */
14557 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14559 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14560 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14561 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14563 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14565 /* Record whether the function returns normally to its caller or not
14566 if the DWARF producer set that information. */
14567 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14568 if (attr
&& (DW_UNSND (attr
) != 0))
14569 TYPE_NO_RETURN (ftype
) = 1;
14571 /* We need to add the subroutine type to the die immediately so
14572 we don't infinitely recurse when dealing with parameters
14573 declared as the same subroutine type. */
14574 set_die_type (die
, ftype
, cu
);
14576 if (die
->child
!= NULL
)
14578 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14579 struct die_info
*child_die
;
14580 int nparams
, iparams
;
14582 /* Count the number of parameters.
14583 FIXME: GDB currently ignores vararg functions, but knows about
14584 vararg member functions. */
14586 child_die
= die
->child
;
14587 while (child_die
&& child_die
->tag
)
14589 if (child_die
->tag
== DW_TAG_formal_parameter
)
14591 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14592 TYPE_VARARGS (ftype
) = 1;
14593 child_die
= sibling_die (child_die
);
14596 /* Allocate storage for parameters and fill them in. */
14597 TYPE_NFIELDS (ftype
) = nparams
;
14598 TYPE_FIELDS (ftype
) = (struct field
*)
14599 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14601 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14602 even if we error out during the parameters reading below. */
14603 for (iparams
= 0; iparams
< nparams
; iparams
++)
14604 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14607 child_die
= die
->child
;
14608 while (child_die
&& child_die
->tag
)
14610 if (child_die
->tag
== DW_TAG_formal_parameter
)
14612 struct type
*arg_type
;
14614 /* DWARF version 2 has no clean way to discern C++
14615 static and non-static member functions. G++ helps
14616 GDB by marking the first parameter for non-static
14617 member functions (which is the this pointer) as
14618 artificial. We pass this information to
14619 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14621 DWARF version 3 added DW_AT_object_pointer, which GCC
14622 4.5 does not yet generate. */
14623 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14625 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14628 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14630 /* GCC/43521: In java, the formal parameter
14631 "this" is sometimes not marked with DW_AT_artificial. */
14632 if (cu
->language
== language_java
)
14634 const char *name
= dwarf2_name (child_die
, cu
);
14636 if (name
&& !strcmp (name
, "this"))
14637 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14640 arg_type
= die_type (child_die
, cu
);
14642 /* RealView does not mark THIS as const, which the testsuite
14643 expects. GCC marks THIS as const in method definitions,
14644 but not in the class specifications (GCC PR 43053). */
14645 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14646 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14649 struct dwarf2_cu
*arg_cu
= cu
;
14650 const char *name
= dwarf2_name (child_die
, cu
);
14652 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14655 /* If the compiler emits this, use it. */
14656 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14659 else if (name
&& strcmp (name
, "this") == 0)
14660 /* Function definitions will have the argument names. */
14662 else if (name
== NULL
&& iparams
== 0)
14663 /* Declarations may not have the names, so like
14664 elsewhere in GDB, assume an artificial first
14665 argument is "this". */
14669 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14673 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14676 child_die
= sibling_die (child_die
);
14683 static struct type
*
14684 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14686 struct objfile
*objfile
= cu
->objfile
;
14687 const char *name
= NULL
;
14688 struct type
*this_type
, *target_type
;
14690 name
= dwarf2_full_name (NULL
, die
, cu
);
14691 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14692 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14693 TYPE_NAME (this_type
) = name
;
14694 set_die_type (die
, this_type
, cu
);
14695 target_type
= die_type (die
, cu
);
14696 if (target_type
!= this_type
)
14697 TYPE_TARGET_TYPE (this_type
) = target_type
;
14700 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14701 spec and cause infinite loops in GDB. */
14702 complaint (&symfile_complaints
,
14703 _("Self-referential DW_TAG_typedef "
14704 "- DIE at 0x%x [in module %s]"),
14705 die
->offset
.sect_off
, objfile_name (objfile
));
14706 TYPE_TARGET_TYPE (this_type
) = NULL
;
14711 /* Find a representation of a given base type and install
14712 it in the TYPE field of the die. */
14714 static struct type
*
14715 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14717 struct objfile
*objfile
= cu
->objfile
;
14719 struct attribute
*attr
;
14720 int encoding
= 0, size
= 0;
14722 enum type_code code
= TYPE_CODE_INT
;
14723 int type_flags
= 0;
14724 struct type
*target_type
= NULL
;
14726 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14729 encoding
= DW_UNSND (attr
);
14731 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14734 size
= DW_UNSND (attr
);
14736 name
= dwarf2_name (die
, cu
);
14739 complaint (&symfile_complaints
,
14740 _("DW_AT_name missing from DW_TAG_base_type"));
14745 case DW_ATE_address
:
14746 /* Turn DW_ATE_address into a void * pointer. */
14747 code
= TYPE_CODE_PTR
;
14748 type_flags
|= TYPE_FLAG_UNSIGNED
;
14749 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14751 case DW_ATE_boolean
:
14752 code
= TYPE_CODE_BOOL
;
14753 type_flags
|= TYPE_FLAG_UNSIGNED
;
14755 case DW_ATE_complex_float
:
14756 code
= TYPE_CODE_COMPLEX
;
14757 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14759 case DW_ATE_decimal_float
:
14760 code
= TYPE_CODE_DECFLOAT
;
14763 code
= TYPE_CODE_FLT
;
14765 case DW_ATE_signed
:
14767 case DW_ATE_unsigned
:
14768 type_flags
|= TYPE_FLAG_UNSIGNED
;
14769 if (cu
->language
== language_fortran
14771 && startswith (name
, "character("))
14772 code
= TYPE_CODE_CHAR
;
14774 case DW_ATE_signed_char
:
14775 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14776 || cu
->language
== language_pascal
14777 || cu
->language
== language_fortran
)
14778 code
= TYPE_CODE_CHAR
;
14780 case DW_ATE_unsigned_char
:
14781 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14782 || cu
->language
== language_pascal
14783 || cu
->language
== language_fortran
)
14784 code
= TYPE_CODE_CHAR
;
14785 type_flags
|= TYPE_FLAG_UNSIGNED
;
14788 /* We just treat this as an integer and then recognize the
14789 type by name elsewhere. */
14793 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14794 dwarf_type_encoding_name (encoding
));
14798 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14799 TYPE_NAME (type
) = name
;
14800 TYPE_TARGET_TYPE (type
) = target_type
;
14802 if (name
&& strcmp (name
, "char") == 0)
14803 TYPE_NOSIGN (type
) = 1;
14805 return set_die_type (die
, type
, cu
);
14808 /* Parse dwarf attribute if it's a block, reference or constant and put the
14809 resulting value of the attribute into struct bound_prop.
14810 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14813 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14814 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14816 struct dwarf2_property_baton
*baton
;
14817 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14819 if (attr
== NULL
|| prop
== NULL
)
14822 if (attr_form_is_block (attr
))
14824 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14825 baton
->referenced_type
= NULL
;
14826 baton
->locexpr
.per_cu
= cu
->per_cu
;
14827 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14828 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14829 prop
->data
.baton
= baton
;
14830 prop
->kind
= PROP_LOCEXPR
;
14831 gdb_assert (prop
->data
.baton
!= NULL
);
14833 else if (attr_form_is_ref (attr
))
14835 struct dwarf2_cu
*target_cu
= cu
;
14836 struct die_info
*target_die
;
14837 struct attribute
*target_attr
;
14839 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14840 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14841 if (target_attr
== NULL
)
14842 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14844 if (target_attr
== NULL
)
14847 switch (target_attr
->name
)
14849 case DW_AT_location
:
14850 if (attr_form_is_section_offset (target_attr
))
14852 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14853 baton
->referenced_type
= die_type (target_die
, target_cu
);
14854 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14855 prop
->data
.baton
= baton
;
14856 prop
->kind
= PROP_LOCLIST
;
14857 gdb_assert (prop
->data
.baton
!= NULL
);
14859 else if (attr_form_is_block (target_attr
))
14861 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14862 baton
->referenced_type
= die_type (target_die
, target_cu
);
14863 baton
->locexpr
.per_cu
= cu
->per_cu
;
14864 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14865 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14866 prop
->data
.baton
= baton
;
14867 prop
->kind
= PROP_LOCEXPR
;
14868 gdb_assert (prop
->data
.baton
!= NULL
);
14872 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14873 "dynamic property");
14877 case DW_AT_data_member_location
:
14881 if (!handle_data_member_location (target_die
, target_cu
,
14885 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14886 baton
->referenced_type
= read_type_die (target_die
->parent
,
14888 baton
->offset_info
.offset
= offset
;
14889 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14890 prop
->data
.baton
= baton
;
14891 prop
->kind
= PROP_ADDR_OFFSET
;
14896 else if (attr_form_is_constant (attr
))
14898 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14899 prop
->kind
= PROP_CONST
;
14903 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14904 dwarf2_name (die
, cu
));
14911 /* Read the given DW_AT_subrange DIE. */
14913 static struct type
*
14914 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14916 struct type
*base_type
, *orig_base_type
;
14917 struct type
*range_type
;
14918 struct attribute
*attr
;
14919 struct dynamic_prop low
, high
;
14920 int low_default_is_valid
;
14921 int high_bound_is_count
= 0;
14923 LONGEST negative_mask
;
14925 orig_base_type
= die_type (die
, cu
);
14926 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14927 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14928 creating the range type, but we use the result of check_typedef
14929 when examining properties of the type. */
14930 base_type
= check_typedef (orig_base_type
);
14932 /* The die_type call above may have already set the type for this DIE. */
14933 range_type
= get_die_type (die
, cu
);
14937 low
.kind
= PROP_CONST
;
14938 high
.kind
= PROP_CONST
;
14939 high
.data
.const_val
= 0;
14941 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14942 omitting DW_AT_lower_bound. */
14943 switch (cu
->language
)
14946 case language_cplus
:
14947 low
.data
.const_val
= 0;
14948 low_default_is_valid
= 1;
14950 case language_fortran
:
14951 low
.data
.const_val
= 1;
14952 low_default_is_valid
= 1;
14955 case language_java
:
14956 case language_objc
:
14957 low
.data
.const_val
= 0;
14958 low_default_is_valid
= (cu
->header
.version
>= 4);
14962 case language_pascal
:
14963 low
.data
.const_val
= 1;
14964 low_default_is_valid
= (cu
->header
.version
>= 4);
14967 low
.data
.const_val
= 0;
14968 low_default_is_valid
= 0;
14972 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14974 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14975 else if (!low_default_is_valid
)
14976 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14977 "- DIE at 0x%x [in module %s]"),
14978 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14980 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14981 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14983 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14984 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14986 /* If bounds are constant do the final calculation here. */
14987 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14988 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14990 high_bound_is_count
= 1;
14994 /* Dwarf-2 specifications explicitly allows to create subrange types
14995 without specifying a base type.
14996 In that case, the base type must be set to the type of
14997 the lower bound, upper bound or count, in that order, if any of these
14998 three attributes references an object that has a type.
14999 If no base type is found, the Dwarf-2 specifications say that
15000 a signed integer type of size equal to the size of an address should
15002 For the following C code: `extern char gdb_int [];'
15003 GCC produces an empty range DIE.
15004 FIXME: muller/2010-05-28: Possible references to object for low bound,
15005 high bound or count are not yet handled by this code. */
15006 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15008 struct objfile
*objfile
= cu
->objfile
;
15009 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15010 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15011 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15013 /* Test "int", "long int", and "long long int" objfile types,
15014 and select the first one having a size above or equal to the
15015 architecture address size. */
15016 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15017 base_type
= int_type
;
15020 int_type
= objfile_type (objfile
)->builtin_long
;
15021 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15022 base_type
= int_type
;
15025 int_type
= objfile_type (objfile
)->builtin_long_long
;
15026 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15027 base_type
= int_type
;
15032 /* Normally, the DWARF producers are expected to use a signed
15033 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15034 But this is unfortunately not always the case, as witnessed
15035 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15036 is used instead. To work around that ambiguity, we treat
15037 the bounds as signed, and thus sign-extend their values, when
15038 the base type is signed. */
15040 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
15041 if (low
.kind
== PROP_CONST
15042 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15043 low
.data
.const_val
|= negative_mask
;
15044 if (high
.kind
== PROP_CONST
15045 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15046 high
.data
.const_val
|= negative_mask
;
15048 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15050 if (high_bound_is_count
)
15051 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15053 /* Ada expects an empty array on no boundary attributes. */
15054 if (attr
== NULL
&& cu
->language
!= language_ada
)
15055 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15057 name
= dwarf2_name (die
, cu
);
15059 TYPE_NAME (range_type
) = name
;
15061 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15063 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15065 set_die_type (die
, range_type
, cu
);
15067 /* set_die_type should be already done. */
15068 set_descriptive_type (range_type
, die
, cu
);
15073 static struct type
*
15074 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15078 /* For now, we only support the C meaning of an unspecified type: void. */
15080 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15081 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15083 return set_die_type (die
, type
, cu
);
15086 /* Read a single die and all its descendents. Set the die's sibling
15087 field to NULL; set other fields in the die correctly, and set all
15088 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15089 location of the info_ptr after reading all of those dies. PARENT
15090 is the parent of the die in question. */
15092 static struct die_info
*
15093 read_die_and_children (const struct die_reader_specs
*reader
,
15094 const gdb_byte
*info_ptr
,
15095 const gdb_byte
**new_info_ptr
,
15096 struct die_info
*parent
)
15098 struct die_info
*die
;
15099 const gdb_byte
*cur_ptr
;
15102 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15105 *new_info_ptr
= cur_ptr
;
15108 store_in_ref_table (die
, reader
->cu
);
15111 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15115 *new_info_ptr
= cur_ptr
;
15118 die
->sibling
= NULL
;
15119 die
->parent
= parent
;
15123 /* Read a die, all of its descendents, and all of its siblings; set
15124 all of the fields of all of the dies correctly. Arguments are as
15125 in read_die_and_children. */
15127 static struct die_info
*
15128 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15129 const gdb_byte
*info_ptr
,
15130 const gdb_byte
**new_info_ptr
,
15131 struct die_info
*parent
)
15133 struct die_info
*first_die
, *last_sibling
;
15134 const gdb_byte
*cur_ptr
;
15136 cur_ptr
= info_ptr
;
15137 first_die
= last_sibling
= NULL
;
15141 struct die_info
*die
15142 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15146 *new_info_ptr
= cur_ptr
;
15153 last_sibling
->sibling
= die
;
15155 last_sibling
= die
;
15159 /* Read a die, all of its descendents, and all of its siblings; set
15160 all of the fields of all of the dies correctly. Arguments are as
15161 in read_die_and_children.
15162 This the main entry point for reading a DIE and all its children. */
15164 static struct die_info
*
15165 read_die_and_siblings (const struct die_reader_specs
*reader
,
15166 const gdb_byte
*info_ptr
,
15167 const gdb_byte
**new_info_ptr
,
15168 struct die_info
*parent
)
15170 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15171 new_info_ptr
, parent
);
15173 if (dwarf_die_debug
)
15175 fprintf_unfiltered (gdb_stdlog
,
15176 "Read die from %s@0x%x of %s:\n",
15177 get_section_name (reader
->die_section
),
15178 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15179 bfd_get_filename (reader
->abfd
));
15180 dump_die (die
, dwarf_die_debug
);
15186 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15188 The caller is responsible for filling in the extra attributes
15189 and updating (*DIEP)->num_attrs.
15190 Set DIEP to point to a newly allocated die with its information,
15191 except for its child, sibling, and parent fields.
15192 Set HAS_CHILDREN to tell whether the die has children or not. */
15194 static const gdb_byte
*
15195 read_full_die_1 (const struct die_reader_specs
*reader
,
15196 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15197 int *has_children
, int num_extra_attrs
)
15199 unsigned int abbrev_number
, bytes_read
, i
;
15200 sect_offset offset
;
15201 struct abbrev_info
*abbrev
;
15202 struct die_info
*die
;
15203 struct dwarf2_cu
*cu
= reader
->cu
;
15204 bfd
*abfd
= reader
->abfd
;
15206 offset
.sect_off
= info_ptr
- reader
->buffer
;
15207 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15208 info_ptr
+= bytes_read
;
15209 if (!abbrev_number
)
15216 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15218 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15220 bfd_get_filename (abfd
));
15222 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15223 die
->offset
= offset
;
15224 die
->tag
= abbrev
->tag
;
15225 die
->abbrev
= abbrev_number
;
15227 /* Make the result usable.
15228 The caller needs to update num_attrs after adding the extra
15230 die
->num_attrs
= abbrev
->num_attrs
;
15232 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15233 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15237 *has_children
= abbrev
->has_children
;
15241 /* Read a die and all its attributes.
15242 Set DIEP to point to a newly allocated die with its information,
15243 except for its child, sibling, and parent fields.
15244 Set HAS_CHILDREN to tell whether the die has children or not. */
15246 static const gdb_byte
*
15247 read_full_die (const struct die_reader_specs
*reader
,
15248 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15251 const gdb_byte
*result
;
15253 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15255 if (dwarf_die_debug
)
15257 fprintf_unfiltered (gdb_stdlog
,
15258 "Read die from %s@0x%x of %s:\n",
15259 get_section_name (reader
->die_section
),
15260 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15261 bfd_get_filename (reader
->abfd
));
15262 dump_die (*diep
, dwarf_die_debug
);
15268 /* Abbreviation tables.
15270 In DWARF version 2, the description of the debugging information is
15271 stored in a separate .debug_abbrev section. Before we read any
15272 dies from a section we read in all abbreviations and install them
15273 in a hash table. */
15275 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15277 static struct abbrev_info
*
15278 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15280 struct abbrev_info
*abbrev
;
15282 abbrev
= (struct abbrev_info
*)
15283 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15284 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15288 /* Add an abbreviation to the table. */
15291 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15292 unsigned int abbrev_number
,
15293 struct abbrev_info
*abbrev
)
15295 unsigned int hash_number
;
15297 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15298 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15299 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15302 /* Look up an abbrev in the table.
15303 Returns NULL if the abbrev is not found. */
15305 static struct abbrev_info
*
15306 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15307 unsigned int abbrev_number
)
15309 unsigned int hash_number
;
15310 struct abbrev_info
*abbrev
;
15312 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15313 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15317 if (abbrev
->number
== abbrev_number
)
15319 abbrev
= abbrev
->next
;
15324 /* Read in an abbrev table. */
15326 static struct abbrev_table
*
15327 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15328 sect_offset offset
)
15330 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15331 bfd
*abfd
= get_section_bfd_owner (section
);
15332 struct abbrev_table
*abbrev_table
;
15333 const gdb_byte
*abbrev_ptr
;
15334 struct abbrev_info
*cur_abbrev
;
15335 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15336 unsigned int abbrev_form
;
15337 struct attr_abbrev
*cur_attrs
;
15338 unsigned int allocated_attrs
;
15340 abbrev_table
= XNEW (struct abbrev_table
);
15341 abbrev_table
->offset
= offset
;
15342 obstack_init (&abbrev_table
->abbrev_obstack
);
15343 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15345 * sizeof (struct abbrev_info
*)));
15346 memset (abbrev_table
->abbrevs
, 0,
15347 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15349 dwarf2_read_section (objfile
, section
);
15350 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15351 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15352 abbrev_ptr
+= bytes_read
;
15354 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15355 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15357 /* Loop until we reach an abbrev number of 0. */
15358 while (abbrev_number
)
15360 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15362 /* read in abbrev header */
15363 cur_abbrev
->number
= abbrev_number
;
15365 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15366 abbrev_ptr
+= bytes_read
;
15367 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15370 /* now read in declarations */
15371 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15372 abbrev_ptr
+= bytes_read
;
15373 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15374 abbrev_ptr
+= bytes_read
;
15375 while (abbrev_name
)
15377 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15379 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15381 = xrealloc (cur_attrs
, (allocated_attrs
15382 * sizeof (struct attr_abbrev
)));
15385 cur_attrs
[cur_abbrev
->num_attrs
].name
15386 = (enum dwarf_attribute
) abbrev_name
;
15387 cur_attrs
[cur_abbrev
->num_attrs
++].form
15388 = (enum dwarf_form
) abbrev_form
;
15389 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15390 abbrev_ptr
+= bytes_read
;
15391 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15392 abbrev_ptr
+= bytes_read
;
15395 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15396 (cur_abbrev
->num_attrs
15397 * sizeof (struct attr_abbrev
)));
15398 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15399 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15401 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15403 /* Get next abbreviation.
15404 Under Irix6 the abbreviations for a compilation unit are not
15405 always properly terminated with an abbrev number of 0.
15406 Exit loop if we encounter an abbreviation which we have
15407 already read (which means we are about to read the abbreviations
15408 for the next compile unit) or if the end of the abbreviation
15409 table is reached. */
15410 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15412 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15413 abbrev_ptr
+= bytes_read
;
15414 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15419 return abbrev_table
;
15422 /* Free the resources held by ABBREV_TABLE. */
15425 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15427 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15428 xfree (abbrev_table
);
15431 /* Same as abbrev_table_free but as a cleanup.
15432 We pass in a pointer to the pointer to the table so that we can
15433 set the pointer to NULL when we're done. It also simplifies
15434 build_type_psymtabs_1. */
15437 abbrev_table_free_cleanup (void *table_ptr
)
15439 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15441 if (*abbrev_table_ptr
!= NULL
)
15442 abbrev_table_free (*abbrev_table_ptr
);
15443 *abbrev_table_ptr
= NULL
;
15446 /* Read the abbrev table for CU from ABBREV_SECTION. */
15449 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15450 struct dwarf2_section_info
*abbrev_section
)
15453 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15456 /* Release the memory used by the abbrev table for a compilation unit. */
15459 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15461 struct dwarf2_cu
*cu
= ptr_to_cu
;
15463 if (cu
->abbrev_table
!= NULL
)
15464 abbrev_table_free (cu
->abbrev_table
);
15465 /* Set this to NULL so that we SEGV if we try to read it later,
15466 and also because free_comp_unit verifies this is NULL. */
15467 cu
->abbrev_table
= NULL
;
15470 /* Returns nonzero if TAG represents a type that we might generate a partial
15474 is_type_tag_for_partial (int tag
)
15479 /* Some types that would be reasonable to generate partial symbols for,
15480 that we don't at present. */
15481 case DW_TAG_array_type
:
15482 case DW_TAG_file_type
:
15483 case DW_TAG_ptr_to_member_type
:
15484 case DW_TAG_set_type
:
15485 case DW_TAG_string_type
:
15486 case DW_TAG_subroutine_type
:
15488 case DW_TAG_base_type
:
15489 case DW_TAG_class_type
:
15490 case DW_TAG_interface_type
:
15491 case DW_TAG_enumeration_type
:
15492 case DW_TAG_structure_type
:
15493 case DW_TAG_subrange_type
:
15494 case DW_TAG_typedef
:
15495 case DW_TAG_union_type
:
15502 /* Load all DIEs that are interesting for partial symbols into memory. */
15504 static struct partial_die_info
*
15505 load_partial_dies (const struct die_reader_specs
*reader
,
15506 const gdb_byte
*info_ptr
, int building_psymtab
)
15508 struct dwarf2_cu
*cu
= reader
->cu
;
15509 struct objfile
*objfile
= cu
->objfile
;
15510 struct partial_die_info
*part_die
;
15511 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15512 struct abbrev_info
*abbrev
;
15513 unsigned int bytes_read
;
15514 unsigned int load_all
= 0;
15515 int nesting_level
= 1;
15520 gdb_assert (cu
->per_cu
!= NULL
);
15521 if (cu
->per_cu
->load_all_dies
)
15525 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15529 &cu
->comp_unit_obstack
,
15530 hashtab_obstack_allocate
,
15531 dummy_obstack_deallocate
);
15533 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15534 sizeof (struct partial_die_info
));
15538 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15540 /* A NULL abbrev means the end of a series of children. */
15541 if (abbrev
== NULL
)
15543 if (--nesting_level
== 0)
15545 /* PART_DIE was probably the last thing allocated on the
15546 comp_unit_obstack, so we could call obstack_free
15547 here. We don't do that because the waste is small,
15548 and will be cleaned up when we're done with this
15549 compilation unit. This way, we're also more robust
15550 against other users of the comp_unit_obstack. */
15553 info_ptr
+= bytes_read
;
15554 last_die
= parent_die
;
15555 parent_die
= parent_die
->die_parent
;
15559 /* Check for template arguments. We never save these; if
15560 they're seen, we just mark the parent, and go on our way. */
15561 if (parent_die
!= NULL
15562 && cu
->language
== language_cplus
15563 && (abbrev
->tag
== DW_TAG_template_type_param
15564 || abbrev
->tag
== DW_TAG_template_value_param
))
15566 parent_die
->has_template_arguments
= 1;
15570 /* We don't need a partial DIE for the template argument. */
15571 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15576 /* We only recurse into c++ subprograms looking for template arguments.
15577 Skip their other children. */
15579 && cu
->language
== language_cplus
15580 && parent_die
!= NULL
15581 && parent_die
->tag
== DW_TAG_subprogram
)
15583 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15587 /* Check whether this DIE is interesting enough to save. Normally
15588 we would not be interested in members here, but there may be
15589 later variables referencing them via DW_AT_specification (for
15590 static members). */
15592 && !is_type_tag_for_partial (abbrev
->tag
)
15593 && abbrev
->tag
!= DW_TAG_constant
15594 && abbrev
->tag
!= DW_TAG_enumerator
15595 && abbrev
->tag
!= DW_TAG_subprogram
15596 && abbrev
->tag
!= DW_TAG_lexical_block
15597 && abbrev
->tag
!= DW_TAG_variable
15598 && abbrev
->tag
!= DW_TAG_namespace
15599 && abbrev
->tag
!= DW_TAG_module
15600 && abbrev
->tag
!= DW_TAG_member
15601 && abbrev
->tag
!= DW_TAG_imported_unit
15602 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15604 /* Otherwise we skip to the next sibling, if any. */
15605 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15609 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15612 /* This two-pass algorithm for processing partial symbols has a
15613 high cost in cache pressure. Thus, handle some simple cases
15614 here which cover the majority of C partial symbols. DIEs
15615 which neither have specification tags in them, nor could have
15616 specification tags elsewhere pointing at them, can simply be
15617 processed and discarded.
15619 This segment is also optional; scan_partial_symbols and
15620 add_partial_symbol will handle these DIEs if we chain
15621 them in normally. When compilers which do not emit large
15622 quantities of duplicate debug information are more common,
15623 this code can probably be removed. */
15625 /* Any complete simple types at the top level (pretty much all
15626 of them, for a language without namespaces), can be processed
15628 if (parent_die
== NULL
15629 && part_die
->has_specification
== 0
15630 && part_die
->is_declaration
== 0
15631 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15632 || part_die
->tag
== DW_TAG_base_type
15633 || part_die
->tag
== DW_TAG_subrange_type
))
15635 if (building_psymtab
&& part_die
->name
!= NULL
)
15636 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15637 VAR_DOMAIN
, LOC_TYPEDEF
,
15638 &objfile
->static_psymbols
,
15639 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15640 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15644 /* The exception for DW_TAG_typedef with has_children above is
15645 a workaround of GCC PR debug/47510. In the case of this complaint
15646 type_name_no_tag_or_error will error on such types later.
15648 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15649 it could not find the child DIEs referenced later, this is checked
15650 above. In correct DWARF DW_TAG_typedef should have no children. */
15652 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15653 complaint (&symfile_complaints
,
15654 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15655 "- DIE at 0x%x [in module %s]"),
15656 part_die
->offset
.sect_off
, objfile_name (objfile
));
15658 /* If we're at the second level, and we're an enumerator, and
15659 our parent has no specification (meaning possibly lives in a
15660 namespace elsewhere), then we can add the partial symbol now
15661 instead of queueing it. */
15662 if (part_die
->tag
== DW_TAG_enumerator
15663 && parent_die
!= NULL
15664 && parent_die
->die_parent
== NULL
15665 && parent_die
->tag
== DW_TAG_enumeration_type
15666 && parent_die
->has_specification
== 0)
15668 if (part_die
->name
== NULL
)
15669 complaint (&symfile_complaints
,
15670 _("malformed enumerator DIE ignored"));
15671 else if (building_psymtab
)
15672 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15673 VAR_DOMAIN
, LOC_CONST
,
15674 (cu
->language
== language_cplus
15675 || cu
->language
== language_java
)
15676 ? &objfile
->global_psymbols
15677 : &objfile
->static_psymbols
,
15678 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15680 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15684 /* We'll save this DIE so link it in. */
15685 part_die
->die_parent
= parent_die
;
15686 part_die
->die_sibling
= NULL
;
15687 part_die
->die_child
= NULL
;
15689 if (last_die
&& last_die
== parent_die
)
15690 last_die
->die_child
= part_die
;
15692 last_die
->die_sibling
= part_die
;
15694 last_die
= part_die
;
15696 if (first_die
== NULL
)
15697 first_die
= part_die
;
15699 /* Maybe add the DIE to the hash table. Not all DIEs that we
15700 find interesting need to be in the hash table, because we
15701 also have the parent/sibling/child chains; only those that we
15702 might refer to by offset later during partial symbol reading.
15704 For now this means things that might have be the target of a
15705 DW_AT_specification, DW_AT_abstract_origin, or
15706 DW_AT_extension. DW_AT_extension will refer only to
15707 namespaces; DW_AT_abstract_origin refers to functions (and
15708 many things under the function DIE, but we do not recurse
15709 into function DIEs during partial symbol reading) and
15710 possibly variables as well; DW_AT_specification refers to
15711 declarations. Declarations ought to have the DW_AT_declaration
15712 flag. It happens that GCC forgets to put it in sometimes, but
15713 only for functions, not for types.
15715 Adding more things than necessary to the hash table is harmless
15716 except for the performance cost. Adding too few will result in
15717 wasted time in find_partial_die, when we reread the compilation
15718 unit with load_all_dies set. */
15721 || abbrev
->tag
== DW_TAG_constant
15722 || abbrev
->tag
== DW_TAG_subprogram
15723 || abbrev
->tag
== DW_TAG_variable
15724 || abbrev
->tag
== DW_TAG_namespace
15725 || part_die
->is_declaration
)
15729 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15730 part_die
->offset
.sect_off
, INSERT
);
15734 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15735 sizeof (struct partial_die_info
));
15737 /* For some DIEs we want to follow their children (if any). For C
15738 we have no reason to follow the children of structures; for other
15739 languages we have to, so that we can get at method physnames
15740 to infer fully qualified class names, for DW_AT_specification,
15741 and for C++ template arguments. For C++, we also look one level
15742 inside functions to find template arguments (if the name of the
15743 function does not already contain the template arguments).
15745 For Ada, we need to scan the children of subprograms and lexical
15746 blocks as well because Ada allows the definition of nested
15747 entities that could be interesting for the debugger, such as
15748 nested subprograms for instance. */
15749 if (last_die
->has_children
15751 || last_die
->tag
== DW_TAG_namespace
15752 || last_die
->tag
== DW_TAG_module
15753 || last_die
->tag
== DW_TAG_enumeration_type
15754 || (cu
->language
== language_cplus
15755 && last_die
->tag
== DW_TAG_subprogram
15756 && (last_die
->name
== NULL
15757 || strchr (last_die
->name
, '<') == NULL
))
15758 || (cu
->language
!= language_c
15759 && (last_die
->tag
== DW_TAG_class_type
15760 || last_die
->tag
== DW_TAG_interface_type
15761 || last_die
->tag
== DW_TAG_structure_type
15762 || last_die
->tag
== DW_TAG_union_type
))
15763 || (cu
->language
== language_ada
15764 && (last_die
->tag
== DW_TAG_subprogram
15765 || last_die
->tag
== DW_TAG_lexical_block
))))
15768 parent_die
= last_die
;
15772 /* Otherwise we skip to the next sibling, if any. */
15773 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15775 /* Back to the top, do it again. */
15779 /* Read a minimal amount of information into the minimal die structure. */
15781 static const gdb_byte
*
15782 read_partial_die (const struct die_reader_specs
*reader
,
15783 struct partial_die_info
*part_die
,
15784 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15785 const gdb_byte
*info_ptr
)
15787 struct dwarf2_cu
*cu
= reader
->cu
;
15788 struct objfile
*objfile
= cu
->objfile
;
15789 const gdb_byte
*buffer
= reader
->buffer
;
15791 struct attribute attr
;
15792 int has_low_pc_attr
= 0;
15793 int has_high_pc_attr
= 0;
15794 int high_pc_relative
= 0;
15796 memset (part_die
, 0, sizeof (struct partial_die_info
));
15798 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15800 info_ptr
+= abbrev_len
;
15802 if (abbrev
== NULL
)
15805 part_die
->tag
= abbrev
->tag
;
15806 part_die
->has_children
= abbrev
->has_children
;
15808 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15810 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15812 /* Store the data if it is of an attribute we want to keep in a
15813 partial symbol table. */
15817 switch (part_die
->tag
)
15819 case DW_TAG_compile_unit
:
15820 case DW_TAG_partial_unit
:
15821 case DW_TAG_type_unit
:
15822 /* Compilation units have a DW_AT_name that is a filename, not
15823 a source language identifier. */
15824 case DW_TAG_enumeration_type
:
15825 case DW_TAG_enumerator
:
15826 /* These tags always have simple identifiers already; no need
15827 to canonicalize them. */
15828 part_die
->name
= DW_STRING (&attr
);
15832 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15833 &objfile
->per_bfd
->storage_obstack
);
15837 case DW_AT_linkage_name
:
15838 case DW_AT_MIPS_linkage_name
:
15839 /* Note that both forms of linkage name might appear. We
15840 assume they will be the same, and we only store the last
15842 if (cu
->language
== language_ada
)
15843 part_die
->name
= DW_STRING (&attr
);
15844 part_die
->linkage_name
= DW_STRING (&attr
);
15847 has_low_pc_attr
= 1;
15848 part_die
->lowpc
= attr_value_as_address (&attr
);
15850 case DW_AT_high_pc
:
15851 has_high_pc_attr
= 1;
15852 part_die
->highpc
= attr_value_as_address (&attr
);
15853 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15854 high_pc_relative
= 1;
15856 case DW_AT_location
:
15857 /* Support the .debug_loc offsets. */
15858 if (attr_form_is_block (&attr
))
15860 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15862 else if (attr_form_is_section_offset (&attr
))
15864 dwarf2_complex_location_expr_complaint ();
15868 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15869 "partial symbol information");
15872 case DW_AT_external
:
15873 part_die
->is_external
= DW_UNSND (&attr
);
15875 case DW_AT_declaration
:
15876 part_die
->is_declaration
= DW_UNSND (&attr
);
15879 part_die
->has_type
= 1;
15881 case DW_AT_abstract_origin
:
15882 case DW_AT_specification
:
15883 case DW_AT_extension
:
15884 part_die
->has_specification
= 1;
15885 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15886 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15887 || cu
->per_cu
->is_dwz
);
15889 case DW_AT_sibling
:
15890 /* Ignore absolute siblings, they might point outside of
15891 the current compile unit. */
15892 if (attr
.form
== DW_FORM_ref_addr
)
15893 complaint (&symfile_complaints
,
15894 _("ignoring absolute DW_AT_sibling"));
15897 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15898 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15900 if (sibling_ptr
< info_ptr
)
15901 complaint (&symfile_complaints
,
15902 _("DW_AT_sibling points backwards"));
15903 else if (sibling_ptr
> reader
->buffer_end
)
15904 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15906 part_die
->sibling
= sibling_ptr
;
15909 case DW_AT_byte_size
:
15910 part_die
->has_byte_size
= 1;
15912 case DW_AT_const_value
:
15913 part_die
->has_const_value
= 1;
15915 case DW_AT_calling_convention
:
15916 /* DWARF doesn't provide a way to identify a program's source-level
15917 entry point. DW_AT_calling_convention attributes are only meant
15918 to describe functions' calling conventions.
15920 However, because it's a necessary piece of information in
15921 Fortran, and because DW_CC_program is the only piece of debugging
15922 information whose definition refers to a 'main program' at all,
15923 several compilers have begun marking Fortran main programs with
15924 DW_CC_program --- even when those functions use the standard
15925 calling conventions.
15927 So until DWARF specifies a way to provide this information and
15928 compilers pick up the new representation, we'll support this
15930 if (DW_UNSND (&attr
) == DW_CC_program
15931 && cu
->language
== language_fortran
)
15932 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15935 if (DW_UNSND (&attr
) == DW_INL_inlined
15936 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15937 part_die
->may_be_inlined
= 1;
15941 if (part_die
->tag
== DW_TAG_imported_unit
)
15943 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15944 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15945 || cu
->per_cu
->is_dwz
);
15954 if (high_pc_relative
)
15955 part_die
->highpc
+= part_die
->lowpc
;
15957 if (has_low_pc_attr
&& has_high_pc_attr
)
15959 /* When using the GNU linker, .gnu.linkonce. sections are used to
15960 eliminate duplicate copies of functions and vtables and such.
15961 The linker will arbitrarily choose one and discard the others.
15962 The AT_*_pc values for such functions refer to local labels in
15963 these sections. If the section from that file was discarded, the
15964 labels are not in the output, so the relocs get a value of 0.
15965 If this is a discarded function, mark the pc bounds as invalid,
15966 so that GDB will ignore it. */
15967 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15969 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15971 complaint (&symfile_complaints
,
15972 _("DW_AT_low_pc %s is zero "
15973 "for DIE at 0x%x [in module %s]"),
15974 paddress (gdbarch
, part_die
->lowpc
),
15975 part_die
->offset
.sect_off
, objfile_name (objfile
));
15977 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15978 else if (part_die
->lowpc
>= part_die
->highpc
)
15980 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15982 complaint (&symfile_complaints
,
15983 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15984 "for DIE at 0x%x [in module %s]"),
15985 paddress (gdbarch
, part_die
->lowpc
),
15986 paddress (gdbarch
, part_die
->highpc
),
15987 part_die
->offset
.sect_off
, objfile_name (objfile
));
15990 part_die
->has_pc_info
= 1;
15996 /* Find a cached partial DIE at OFFSET in CU. */
15998 static struct partial_die_info
*
15999 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16001 struct partial_die_info
*lookup_die
= NULL
;
16002 struct partial_die_info part_die
;
16004 part_die
.offset
= offset
;
16005 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
16011 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16012 except in the case of .debug_types DIEs which do not reference
16013 outside their CU (they do however referencing other types via
16014 DW_FORM_ref_sig8). */
16016 static struct partial_die_info
*
16017 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16019 struct objfile
*objfile
= cu
->objfile
;
16020 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16021 struct partial_die_info
*pd
= NULL
;
16023 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16024 && offset_in_cu_p (&cu
->header
, offset
))
16026 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16029 /* We missed recording what we needed.
16030 Load all dies and try again. */
16031 per_cu
= cu
->per_cu
;
16035 /* TUs don't reference other CUs/TUs (except via type signatures). */
16036 if (cu
->per_cu
->is_debug_types
)
16038 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16039 " external reference to offset 0x%lx [in module %s].\n"),
16040 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16041 bfd_get_filename (objfile
->obfd
));
16043 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16046 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16047 load_partial_comp_unit (per_cu
);
16049 per_cu
->cu
->last_used
= 0;
16050 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16053 /* If we didn't find it, and not all dies have been loaded,
16054 load them all and try again. */
16056 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16058 per_cu
->load_all_dies
= 1;
16060 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16061 THIS_CU->cu may already be in use. So we can't just free it and
16062 replace its DIEs with the ones we read in. Instead, we leave those
16063 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16064 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16066 load_partial_comp_unit (per_cu
);
16068 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16072 internal_error (__FILE__
, __LINE__
,
16073 _("could not find partial DIE 0x%x "
16074 "in cache [from module %s]\n"),
16075 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16079 /* See if we can figure out if the class lives in a namespace. We do
16080 this by looking for a member function; its demangled name will
16081 contain namespace info, if there is any. */
16084 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16085 struct dwarf2_cu
*cu
)
16087 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16088 what template types look like, because the demangler
16089 frequently doesn't give the same name as the debug info. We
16090 could fix this by only using the demangled name to get the
16091 prefix (but see comment in read_structure_type). */
16093 struct partial_die_info
*real_pdi
;
16094 struct partial_die_info
*child_pdi
;
16096 /* If this DIE (this DIE's specification, if any) has a parent, then
16097 we should not do this. We'll prepend the parent's fully qualified
16098 name when we create the partial symbol. */
16100 real_pdi
= struct_pdi
;
16101 while (real_pdi
->has_specification
)
16102 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16103 real_pdi
->spec_is_dwz
, cu
);
16105 if (real_pdi
->die_parent
!= NULL
)
16108 for (child_pdi
= struct_pdi
->die_child
;
16110 child_pdi
= child_pdi
->die_sibling
)
16112 if (child_pdi
->tag
== DW_TAG_subprogram
16113 && child_pdi
->linkage_name
!= NULL
)
16115 char *actual_class_name
16116 = language_class_name_from_physname (cu
->language_defn
,
16117 child_pdi
->linkage_name
);
16118 if (actual_class_name
!= NULL
)
16121 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16123 strlen (actual_class_name
));
16124 xfree (actual_class_name
);
16131 /* Adjust PART_DIE before generating a symbol for it. This function
16132 may set the is_external flag or change the DIE's name. */
16135 fixup_partial_die (struct partial_die_info
*part_die
,
16136 struct dwarf2_cu
*cu
)
16138 /* Once we've fixed up a die, there's no point in doing so again.
16139 This also avoids a memory leak if we were to call
16140 guess_partial_die_structure_name multiple times. */
16141 if (part_die
->fixup_called
)
16144 /* If we found a reference attribute and the DIE has no name, try
16145 to find a name in the referred to DIE. */
16147 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16149 struct partial_die_info
*spec_die
;
16151 spec_die
= find_partial_die (part_die
->spec_offset
,
16152 part_die
->spec_is_dwz
, cu
);
16154 fixup_partial_die (spec_die
, cu
);
16156 if (spec_die
->name
)
16158 part_die
->name
= spec_die
->name
;
16160 /* Copy DW_AT_external attribute if it is set. */
16161 if (spec_die
->is_external
)
16162 part_die
->is_external
= spec_die
->is_external
;
16166 /* Set default names for some unnamed DIEs. */
16168 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16169 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16171 /* If there is no parent die to provide a namespace, and there are
16172 children, see if we can determine the namespace from their linkage
16174 if (cu
->language
== language_cplus
16175 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16176 && part_die
->die_parent
== NULL
16177 && part_die
->has_children
16178 && (part_die
->tag
== DW_TAG_class_type
16179 || part_die
->tag
== DW_TAG_structure_type
16180 || part_die
->tag
== DW_TAG_union_type
))
16181 guess_partial_die_structure_name (part_die
, cu
);
16183 /* GCC might emit a nameless struct or union that has a linkage
16184 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16185 if (part_die
->name
== NULL
16186 && (part_die
->tag
== DW_TAG_class_type
16187 || part_die
->tag
== DW_TAG_interface_type
16188 || part_die
->tag
== DW_TAG_structure_type
16189 || part_die
->tag
== DW_TAG_union_type
)
16190 && part_die
->linkage_name
!= NULL
)
16194 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16199 /* Strip any leading namespaces/classes, keep only the base name.
16200 DW_AT_name for named DIEs does not contain the prefixes. */
16201 base
= strrchr (demangled
, ':');
16202 if (base
&& base
> demangled
&& base
[-1] == ':')
16208 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16209 base
, strlen (base
));
16214 part_die
->fixup_called
= 1;
16217 /* Read an attribute value described by an attribute form. */
16219 static const gdb_byte
*
16220 read_attribute_value (const struct die_reader_specs
*reader
,
16221 struct attribute
*attr
, unsigned form
,
16222 const gdb_byte
*info_ptr
)
16224 struct dwarf2_cu
*cu
= reader
->cu
;
16225 struct objfile
*objfile
= cu
->objfile
;
16226 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16227 bfd
*abfd
= reader
->abfd
;
16228 struct comp_unit_head
*cu_header
= &cu
->header
;
16229 unsigned int bytes_read
;
16230 struct dwarf_block
*blk
;
16232 attr
->form
= (enum dwarf_form
) form
;
16235 case DW_FORM_ref_addr
:
16236 if (cu
->header
.version
== 2)
16237 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16239 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16240 &cu
->header
, &bytes_read
);
16241 info_ptr
+= bytes_read
;
16243 case DW_FORM_GNU_ref_alt
:
16244 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16245 info_ptr
+= bytes_read
;
16248 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16249 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16250 info_ptr
+= bytes_read
;
16252 case DW_FORM_block2
:
16253 blk
= dwarf_alloc_block (cu
);
16254 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16256 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16257 info_ptr
+= blk
->size
;
16258 DW_BLOCK (attr
) = blk
;
16260 case DW_FORM_block4
:
16261 blk
= dwarf_alloc_block (cu
);
16262 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16264 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16265 info_ptr
+= blk
->size
;
16266 DW_BLOCK (attr
) = blk
;
16268 case DW_FORM_data2
:
16269 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16272 case DW_FORM_data4
:
16273 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16276 case DW_FORM_data8
:
16277 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16280 case DW_FORM_sec_offset
:
16281 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16282 info_ptr
+= bytes_read
;
16284 case DW_FORM_string
:
16285 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16286 DW_STRING_IS_CANONICAL (attr
) = 0;
16287 info_ptr
+= bytes_read
;
16290 if (!cu
->per_cu
->is_dwz
)
16292 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16294 DW_STRING_IS_CANONICAL (attr
) = 0;
16295 info_ptr
+= bytes_read
;
16299 case DW_FORM_GNU_strp_alt
:
16301 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16302 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16305 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16306 DW_STRING_IS_CANONICAL (attr
) = 0;
16307 info_ptr
+= bytes_read
;
16310 case DW_FORM_exprloc
:
16311 case DW_FORM_block
:
16312 blk
= dwarf_alloc_block (cu
);
16313 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16314 info_ptr
+= bytes_read
;
16315 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16316 info_ptr
+= blk
->size
;
16317 DW_BLOCK (attr
) = blk
;
16319 case DW_FORM_block1
:
16320 blk
= dwarf_alloc_block (cu
);
16321 blk
->size
= read_1_byte (abfd
, info_ptr
);
16323 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16324 info_ptr
+= blk
->size
;
16325 DW_BLOCK (attr
) = blk
;
16327 case DW_FORM_data1
:
16328 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16332 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16335 case DW_FORM_flag_present
:
16336 DW_UNSND (attr
) = 1;
16338 case DW_FORM_sdata
:
16339 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16340 info_ptr
+= bytes_read
;
16342 case DW_FORM_udata
:
16343 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16344 info_ptr
+= bytes_read
;
16347 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16348 + read_1_byte (abfd
, info_ptr
));
16352 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16353 + read_2_bytes (abfd
, info_ptr
));
16357 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16358 + read_4_bytes (abfd
, info_ptr
));
16362 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16363 + read_8_bytes (abfd
, info_ptr
));
16366 case DW_FORM_ref_sig8
:
16367 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16370 case DW_FORM_ref_udata
:
16371 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16372 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16373 info_ptr
+= bytes_read
;
16375 case DW_FORM_indirect
:
16376 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16377 info_ptr
+= bytes_read
;
16378 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16380 case DW_FORM_GNU_addr_index
:
16381 if (reader
->dwo_file
== NULL
)
16383 /* For now flag a hard error.
16384 Later we can turn this into a complaint. */
16385 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16386 dwarf_form_name (form
),
16387 bfd_get_filename (abfd
));
16389 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16390 info_ptr
+= bytes_read
;
16392 case DW_FORM_GNU_str_index
:
16393 if (reader
->dwo_file
== NULL
)
16395 /* For now flag a hard error.
16396 Later we can turn this into a complaint if warranted. */
16397 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16398 dwarf_form_name (form
),
16399 bfd_get_filename (abfd
));
16402 ULONGEST str_index
=
16403 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16405 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16406 DW_STRING_IS_CANONICAL (attr
) = 0;
16407 info_ptr
+= bytes_read
;
16411 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16412 dwarf_form_name (form
),
16413 bfd_get_filename (abfd
));
16417 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16418 attr
->form
= DW_FORM_GNU_ref_alt
;
16420 /* We have seen instances where the compiler tried to emit a byte
16421 size attribute of -1 which ended up being encoded as an unsigned
16422 0xffffffff. Although 0xffffffff is technically a valid size value,
16423 an object of this size seems pretty unlikely so we can relatively
16424 safely treat these cases as if the size attribute was invalid and
16425 treat them as zero by default. */
16426 if (attr
->name
== DW_AT_byte_size
16427 && form
== DW_FORM_data4
16428 && DW_UNSND (attr
) >= 0xffffffff)
16431 (&symfile_complaints
,
16432 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16433 hex_string (DW_UNSND (attr
)));
16434 DW_UNSND (attr
) = 0;
16440 /* Read an attribute described by an abbreviated attribute. */
16442 static const gdb_byte
*
16443 read_attribute (const struct die_reader_specs
*reader
,
16444 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16445 const gdb_byte
*info_ptr
)
16447 attr
->name
= abbrev
->name
;
16448 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16451 /* Read dwarf information from a buffer. */
16453 static unsigned int
16454 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16456 return bfd_get_8 (abfd
, buf
);
16460 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16462 return bfd_get_signed_8 (abfd
, buf
);
16465 static unsigned int
16466 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16468 return bfd_get_16 (abfd
, buf
);
16472 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16474 return bfd_get_signed_16 (abfd
, buf
);
16477 static unsigned int
16478 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16480 return bfd_get_32 (abfd
, buf
);
16484 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16486 return bfd_get_signed_32 (abfd
, buf
);
16490 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16492 return bfd_get_64 (abfd
, buf
);
16496 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16497 unsigned int *bytes_read
)
16499 struct comp_unit_head
*cu_header
= &cu
->header
;
16500 CORE_ADDR retval
= 0;
16502 if (cu_header
->signed_addr_p
)
16504 switch (cu_header
->addr_size
)
16507 retval
= bfd_get_signed_16 (abfd
, buf
);
16510 retval
= bfd_get_signed_32 (abfd
, buf
);
16513 retval
= bfd_get_signed_64 (abfd
, buf
);
16516 internal_error (__FILE__
, __LINE__
,
16517 _("read_address: bad switch, signed [in module %s]"),
16518 bfd_get_filename (abfd
));
16523 switch (cu_header
->addr_size
)
16526 retval
= bfd_get_16 (abfd
, buf
);
16529 retval
= bfd_get_32 (abfd
, buf
);
16532 retval
= bfd_get_64 (abfd
, buf
);
16535 internal_error (__FILE__
, __LINE__
,
16536 _("read_address: bad switch, "
16537 "unsigned [in module %s]"),
16538 bfd_get_filename (abfd
));
16542 *bytes_read
= cu_header
->addr_size
;
16546 /* Read the initial length from a section. The (draft) DWARF 3
16547 specification allows the initial length to take up either 4 bytes
16548 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16549 bytes describe the length and all offsets will be 8 bytes in length
16552 An older, non-standard 64-bit format is also handled by this
16553 function. The older format in question stores the initial length
16554 as an 8-byte quantity without an escape value. Lengths greater
16555 than 2^32 aren't very common which means that the initial 4 bytes
16556 is almost always zero. Since a length value of zero doesn't make
16557 sense for the 32-bit format, this initial zero can be considered to
16558 be an escape value which indicates the presence of the older 64-bit
16559 format. As written, the code can't detect (old format) lengths
16560 greater than 4GB. If it becomes necessary to handle lengths
16561 somewhat larger than 4GB, we could allow other small values (such
16562 as the non-sensical values of 1, 2, and 3) to also be used as
16563 escape values indicating the presence of the old format.
16565 The value returned via bytes_read should be used to increment the
16566 relevant pointer after calling read_initial_length().
16568 [ Note: read_initial_length() and read_offset() are based on the
16569 document entitled "DWARF Debugging Information Format", revision
16570 3, draft 8, dated November 19, 2001. This document was obtained
16573 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16575 This document is only a draft and is subject to change. (So beware.)
16577 Details regarding the older, non-standard 64-bit format were
16578 determined empirically by examining 64-bit ELF files produced by
16579 the SGI toolchain on an IRIX 6.5 machine.
16581 - Kevin, July 16, 2002
16585 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16587 LONGEST length
= bfd_get_32 (abfd
, buf
);
16589 if (length
== 0xffffffff)
16591 length
= bfd_get_64 (abfd
, buf
+ 4);
16594 else if (length
== 0)
16596 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16597 length
= bfd_get_64 (abfd
, buf
);
16608 /* Cover function for read_initial_length.
16609 Returns the length of the object at BUF, and stores the size of the
16610 initial length in *BYTES_READ and stores the size that offsets will be in
16612 If the initial length size is not equivalent to that specified in
16613 CU_HEADER then issue a complaint.
16614 This is useful when reading non-comp-unit headers. */
16617 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16618 const struct comp_unit_head
*cu_header
,
16619 unsigned int *bytes_read
,
16620 unsigned int *offset_size
)
16622 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16624 gdb_assert (cu_header
->initial_length_size
== 4
16625 || cu_header
->initial_length_size
== 8
16626 || cu_header
->initial_length_size
== 12);
16628 if (cu_header
->initial_length_size
!= *bytes_read
)
16629 complaint (&symfile_complaints
,
16630 _("intermixed 32-bit and 64-bit DWARF sections"));
16632 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16636 /* Read an offset from the data stream. The size of the offset is
16637 given by cu_header->offset_size. */
16640 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16641 const struct comp_unit_head
*cu_header
,
16642 unsigned int *bytes_read
)
16644 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16646 *bytes_read
= cu_header
->offset_size
;
16650 /* Read an offset from the data stream. */
16653 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16655 LONGEST retval
= 0;
16657 switch (offset_size
)
16660 retval
= bfd_get_32 (abfd
, buf
);
16663 retval
= bfd_get_64 (abfd
, buf
);
16666 internal_error (__FILE__
, __LINE__
,
16667 _("read_offset_1: bad switch [in module %s]"),
16668 bfd_get_filename (abfd
));
16674 static const gdb_byte
*
16675 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16677 /* If the size of a host char is 8 bits, we can return a pointer
16678 to the buffer, otherwise we have to copy the data to a buffer
16679 allocated on the temporary obstack. */
16680 gdb_assert (HOST_CHAR_BIT
== 8);
16684 static const char *
16685 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16686 unsigned int *bytes_read_ptr
)
16688 /* If the size of a host char is 8 bits, we can return a pointer
16689 to the string, otherwise we have to copy the string to a buffer
16690 allocated on the temporary obstack. */
16691 gdb_assert (HOST_CHAR_BIT
== 8);
16694 *bytes_read_ptr
= 1;
16697 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16698 return (const char *) buf
;
16701 static const char *
16702 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16704 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16705 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16706 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16707 bfd_get_filename (abfd
));
16708 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16709 error (_("DW_FORM_strp pointing outside of "
16710 ".debug_str section [in module %s]"),
16711 bfd_get_filename (abfd
));
16712 gdb_assert (HOST_CHAR_BIT
== 8);
16713 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16715 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16718 /* Read a string at offset STR_OFFSET in the .debug_str section from
16719 the .dwz file DWZ. Throw an error if the offset is too large. If
16720 the string consists of a single NUL byte, return NULL; otherwise
16721 return a pointer to the string. */
16723 static const char *
16724 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16726 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16728 if (dwz
->str
.buffer
== NULL
)
16729 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16730 "section [in module %s]"),
16731 bfd_get_filename (dwz
->dwz_bfd
));
16732 if (str_offset
>= dwz
->str
.size
)
16733 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16734 ".debug_str section [in module %s]"),
16735 bfd_get_filename (dwz
->dwz_bfd
));
16736 gdb_assert (HOST_CHAR_BIT
== 8);
16737 if (dwz
->str
.buffer
[str_offset
] == '\0')
16739 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16742 static const char *
16743 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16744 const struct comp_unit_head
*cu_header
,
16745 unsigned int *bytes_read_ptr
)
16747 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16749 return read_indirect_string_at_offset (abfd
, str_offset
);
16753 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16754 unsigned int *bytes_read_ptr
)
16757 unsigned int num_read
;
16759 unsigned char byte
;
16767 byte
= bfd_get_8 (abfd
, buf
);
16770 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16771 if ((byte
& 128) == 0)
16777 *bytes_read_ptr
= num_read
;
16782 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16783 unsigned int *bytes_read_ptr
)
16786 int i
, shift
, num_read
;
16787 unsigned char byte
;
16795 byte
= bfd_get_8 (abfd
, buf
);
16798 result
|= ((LONGEST
) (byte
& 127) << shift
);
16800 if ((byte
& 128) == 0)
16805 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16806 result
|= -(((LONGEST
) 1) << shift
);
16807 *bytes_read_ptr
= num_read
;
16811 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16812 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16813 ADDR_SIZE is the size of addresses from the CU header. */
16816 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16818 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16819 bfd
*abfd
= objfile
->obfd
;
16820 const gdb_byte
*info_ptr
;
16822 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16823 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16824 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16825 objfile_name (objfile
));
16826 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16827 error (_("DW_FORM_addr_index pointing outside of "
16828 ".debug_addr section [in module %s]"),
16829 objfile_name (objfile
));
16830 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16831 + addr_base
+ addr_index
* addr_size
);
16832 if (addr_size
== 4)
16833 return bfd_get_32 (abfd
, info_ptr
);
16835 return bfd_get_64 (abfd
, info_ptr
);
16838 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16841 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16843 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16846 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16849 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16850 unsigned int *bytes_read
)
16852 bfd
*abfd
= cu
->objfile
->obfd
;
16853 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16855 return read_addr_index (cu
, addr_index
);
16858 /* Data structure to pass results from dwarf2_read_addr_index_reader
16859 back to dwarf2_read_addr_index. */
16861 struct dwarf2_read_addr_index_data
16863 ULONGEST addr_base
;
16867 /* die_reader_func for dwarf2_read_addr_index. */
16870 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16871 const gdb_byte
*info_ptr
,
16872 struct die_info
*comp_unit_die
,
16876 struct dwarf2_cu
*cu
= reader
->cu
;
16877 struct dwarf2_read_addr_index_data
*aidata
=
16878 (struct dwarf2_read_addr_index_data
*) data
;
16880 aidata
->addr_base
= cu
->addr_base
;
16881 aidata
->addr_size
= cu
->header
.addr_size
;
16884 /* Given an index in .debug_addr, fetch the value.
16885 NOTE: This can be called during dwarf expression evaluation,
16886 long after the debug information has been read, and thus per_cu->cu
16887 may no longer exist. */
16890 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16891 unsigned int addr_index
)
16893 struct objfile
*objfile
= per_cu
->objfile
;
16894 struct dwarf2_cu
*cu
= per_cu
->cu
;
16895 ULONGEST addr_base
;
16898 /* This is intended to be called from outside this file. */
16899 dw2_setup (objfile
);
16901 /* We need addr_base and addr_size.
16902 If we don't have PER_CU->cu, we have to get it.
16903 Nasty, but the alternative is storing the needed info in PER_CU,
16904 which at this point doesn't seem justified: it's not clear how frequently
16905 it would get used and it would increase the size of every PER_CU.
16906 Entry points like dwarf2_per_cu_addr_size do a similar thing
16907 so we're not in uncharted territory here.
16908 Alas we need to be a bit more complicated as addr_base is contained
16911 We don't need to read the entire CU(/TU).
16912 We just need the header and top level die.
16914 IWBN to use the aging mechanism to let us lazily later discard the CU.
16915 For now we skip this optimization. */
16919 addr_base
= cu
->addr_base
;
16920 addr_size
= cu
->header
.addr_size
;
16924 struct dwarf2_read_addr_index_data aidata
;
16926 /* Note: We can't use init_cutu_and_read_dies_simple here,
16927 we need addr_base. */
16928 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16929 dwarf2_read_addr_index_reader
, &aidata
);
16930 addr_base
= aidata
.addr_base
;
16931 addr_size
= aidata
.addr_size
;
16934 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16937 /* Given a DW_FORM_GNU_str_index, fetch the string.
16938 This is only used by the Fission support. */
16940 static const char *
16941 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16943 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16944 const char *objf_name
= objfile_name (objfile
);
16945 bfd
*abfd
= objfile
->obfd
;
16946 struct dwarf2_cu
*cu
= reader
->cu
;
16947 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16948 struct dwarf2_section_info
*str_offsets_section
=
16949 &reader
->dwo_file
->sections
.str_offsets
;
16950 const gdb_byte
*info_ptr
;
16951 ULONGEST str_offset
;
16952 static const char form_name
[] = "DW_FORM_GNU_str_index";
16954 dwarf2_read_section (objfile
, str_section
);
16955 dwarf2_read_section (objfile
, str_offsets_section
);
16956 if (str_section
->buffer
== NULL
)
16957 error (_("%s used without .debug_str.dwo section"
16958 " in CU at offset 0x%lx [in module %s]"),
16959 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16960 if (str_offsets_section
->buffer
== NULL
)
16961 error (_("%s used without .debug_str_offsets.dwo section"
16962 " in CU at offset 0x%lx [in module %s]"),
16963 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16964 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16965 error (_("%s pointing outside of .debug_str_offsets.dwo"
16966 " section in CU at offset 0x%lx [in module %s]"),
16967 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16968 info_ptr
= (str_offsets_section
->buffer
16969 + str_index
* cu
->header
.offset_size
);
16970 if (cu
->header
.offset_size
== 4)
16971 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16973 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16974 if (str_offset
>= str_section
->size
)
16975 error (_("Offset from %s pointing outside of"
16976 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16977 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16978 return (const char *) (str_section
->buffer
+ str_offset
);
16981 /* Return the length of an LEB128 number in BUF. */
16984 leb128_size (const gdb_byte
*buf
)
16986 const gdb_byte
*begin
= buf
;
16992 if ((byte
& 128) == 0)
16993 return buf
- begin
;
16998 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17007 cu
->language
= language_c
;
17009 case DW_LANG_C_plus_plus
:
17010 case DW_LANG_C_plus_plus_11
:
17011 case DW_LANG_C_plus_plus_14
:
17012 cu
->language
= language_cplus
;
17015 cu
->language
= language_d
;
17017 case DW_LANG_Fortran77
:
17018 case DW_LANG_Fortran90
:
17019 case DW_LANG_Fortran95
:
17020 case DW_LANG_Fortran03
:
17021 case DW_LANG_Fortran08
:
17022 cu
->language
= language_fortran
;
17025 cu
->language
= language_go
;
17027 case DW_LANG_Mips_Assembler
:
17028 cu
->language
= language_asm
;
17031 cu
->language
= language_java
;
17033 case DW_LANG_Ada83
:
17034 case DW_LANG_Ada95
:
17035 cu
->language
= language_ada
;
17037 case DW_LANG_Modula2
:
17038 cu
->language
= language_m2
;
17040 case DW_LANG_Pascal83
:
17041 cu
->language
= language_pascal
;
17044 cu
->language
= language_objc
;
17046 case DW_LANG_Cobol74
:
17047 case DW_LANG_Cobol85
:
17049 cu
->language
= language_minimal
;
17052 cu
->language_defn
= language_def (cu
->language
);
17055 /* Return the named attribute or NULL if not there. */
17057 static struct attribute
*
17058 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17063 struct attribute
*spec
= NULL
;
17065 for (i
= 0; i
< die
->num_attrs
; ++i
)
17067 if (die
->attrs
[i
].name
== name
)
17068 return &die
->attrs
[i
];
17069 if (die
->attrs
[i
].name
== DW_AT_specification
17070 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17071 spec
= &die
->attrs
[i
];
17077 die
= follow_die_ref (die
, spec
, &cu
);
17083 /* Return the named attribute or NULL if not there,
17084 but do not follow DW_AT_specification, etc.
17085 This is for use in contexts where we're reading .debug_types dies.
17086 Following DW_AT_specification, DW_AT_abstract_origin will take us
17087 back up the chain, and we want to go down. */
17089 static struct attribute
*
17090 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17094 for (i
= 0; i
< die
->num_attrs
; ++i
)
17095 if (die
->attrs
[i
].name
== name
)
17096 return &die
->attrs
[i
];
17101 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17102 and holds a non-zero value. This function should only be used for
17103 DW_FORM_flag or DW_FORM_flag_present attributes. */
17106 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17108 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17110 return (attr
&& DW_UNSND (attr
));
17114 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17116 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17117 which value is non-zero. However, we have to be careful with
17118 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17119 (via dwarf2_flag_true_p) follows this attribute. So we may
17120 end up accidently finding a declaration attribute that belongs
17121 to a different DIE referenced by the specification attribute,
17122 even though the given DIE does not have a declaration attribute. */
17123 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17124 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17127 /* Return the die giving the specification for DIE, if there is
17128 one. *SPEC_CU is the CU containing DIE on input, and the CU
17129 containing the return value on output. If there is no
17130 specification, but there is an abstract origin, that is
17133 static struct die_info
*
17134 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17136 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17139 if (spec_attr
== NULL
)
17140 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17142 if (spec_attr
== NULL
)
17145 return follow_die_ref (die
, spec_attr
, spec_cu
);
17148 /* Free the line_header structure *LH, and any arrays and strings it
17150 NOTE: This is also used as a "cleanup" function. */
17153 free_line_header (struct line_header
*lh
)
17155 if (lh
->standard_opcode_lengths
)
17156 xfree (lh
->standard_opcode_lengths
);
17158 /* Remember that all the lh->file_names[i].name pointers are
17159 pointers into debug_line_buffer, and don't need to be freed. */
17160 if (lh
->file_names
)
17161 xfree (lh
->file_names
);
17163 /* Similarly for the include directory names. */
17164 if (lh
->include_dirs
)
17165 xfree (lh
->include_dirs
);
17170 /* Stub for free_line_header to match void * callback types. */
17173 free_line_header_voidp (void *arg
)
17175 struct line_header
*lh
= arg
;
17177 free_line_header (lh
);
17180 /* Add an entry to LH's include directory table. */
17183 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17185 if (dwarf_line_debug
>= 2)
17186 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17187 lh
->num_include_dirs
+ 1, include_dir
);
17189 /* Grow the array if necessary. */
17190 if (lh
->include_dirs_size
== 0)
17192 lh
->include_dirs_size
= 1; /* for testing */
17193 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17194 * sizeof (*lh
->include_dirs
));
17196 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17198 lh
->include_dirs_size
*= 2;
17199 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17200 (lh
->include_dirs_size
17201 * sizeof (*lh
->include_dirs
)));
17204 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17207 /* Add an entry to LH's file name table. */
17210 add_file_name (struct line_header
*lh
,
17212 unsigned int dir_index
,
17213 unsigned int mod_time
,
17214 unsigned int length
)
17216 struct file_entry
*fe
;
17218 if (dwarf_line_debug
>= 2)
17219 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17220 lh
->num_file_names
+ 1, name
);
17222 /* Grow the array if necessary. */
17223 if (lh
->file_names_size
== 0)
17225 lh
->file_names_size
= 1; /* for testing */
17226 lh
->file_names
= xmalloc (lh
->file_names_size
17227 * sizeof (*lh
->file_names
));
17229 else if (lh
->num_file_names
>= lh
->file_names_size
)
17231 lh
->file_names_size
*= 2;
17232 lh
->file_names
= xrealloc (lh
->file_names
,
17233 (lh
->file_names_size
17234 * sizeof (*lh
->file_names
)));
17237 fe
= &lh
->file_names
[lh
->num_file_names
++];
17239 fe
->dir_index
= dir_index
;
17240 fe
->mod_time
= mod_time
;
17241 fe
->length
= length
;
17242 fe
->included_p
= 0;
17246 /* A convenience function to find the proper .debug_line section for a CU. */
17248 static struct dwarf2_section_info
*
17249 get_debug_line_section (struct dwarf2_cu
*cu
)
17251 struct dwarf2_section_info
*section
;
17253 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17255 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17256 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17257 else if (cu
->per_cu
->is_dwz
)
17259 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17261 section
= &dwz
->line
;
17264 section
= &dwarf2_per_objfile
->line
;
17269 /* Read the statement program header starting at OFFSET in
17270 .debug_line, or .debug_line.dwo. Return a pointer
17271 to a struct line_header, allocated using xmalloc.
17272 Returns NULL if there is a problem reading the header, e.g., if it
17273 has a version we don't understand.
17275 NOTE: the strings in the include directory and file name tables of
17276 the returned object point into the dwarf line section buffer,
17277 and must not be freed. */
17279 static struct line_header
*
17280 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17282 struct cleanup
*back_to
;
17283 struct line_header
*lh
;
17284 const gdb_byte
*line_ptr
;
17285 unsigned int bytes_read
, offset_size
;
17287 const char *cur_dir
, *cur_file
;
17288 struct dwarf2_section_info
*section
;
17291 section
= get_debug_line_section (cu
);
17292 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17293 if (section
->buffer
== NULL
)
17295 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17296 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17298 complaint (&symfile_complaints
, _("missing .debug_line section"));
17302 /* We can't do this until we know the section is non-empty.
17303 Only then do we know we have such a section. */
17304 abfd
= get_section_bfd_owner (section
);
17306 /* Make sure that at least there's room for the total_length field.
17307 That could be 12 bytes long, but we're just going to fudge that. */
17308 if (offset
+ 4 >= section
->size
)
17310 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17314 lh
= xmalloc (sizeof (*lh
));
17315 memset (lh
, 0, sizeof (*lh
));
17316 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17319 lh
->offset
.sect_off
= offset
;
17320 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17322 line_ptr
= section
->buffer
+ offset
;
17324 /* Read in the header. */
17326 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17327 &bytes_read
, &offset_size
);
17328 line_ptr
+= bytes_read
;
17329 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17331 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17332 do_cleanups (back_to
);
17335 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17336 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17338 if (lh
->version
> 4)
17340 /* This is a version we don't understand. The format could have
17341 changed in ways we don't handle properly so just punt. */
17342 complaint (&symfile_complaints
,
17343 _("unsupported version in .debug_line section"));
17346 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17347 line_ptr
+= offset_size
;
17348 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17350 if (lh
->version
>= 4)
17352 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17356 lh
->maximum_ops_per_instruction
= 1;
17358 if (lh
->maximum_ops_per_instruction
== 0)
17360 lh
->maximum_ops_per_instruction
= 1;
17361 complaint (&symfile_complaints
,
17362 _("invalid maximum_ops_per_instruction "
17363 "in `.debug_line' section"));
17366 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17368 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17370 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17372 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17374 lh
->standard_opcode_lengths
17375 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17377 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17378 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17380 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17384 /* Read directory table. */
17385 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17387 line_ptr
+= bytes_read
;
17388 add_include_dir (lh
, cur_dir
);
17390 line_ptr
+= bytes_read
;
17392 /* Read file name table. */
17393 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17395 unsigned int dir_index
, mod_time
, length
;
17397 line_ptr
+= bytes_read
;
17398 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17399 line_ptr
+= bytes_read
;
17400 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17401 line_ptr
+= bytes_read
;
17402 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17403 line_ptr
+= bytes_read
;
17405 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17407 line_ptr
+= bytes_read
;
17408 lh
->statement_program_start
= line_ptr
;
17410 if (line_ptr
> (section
->buffer
+ section
->size
))
17411 complaint (&symfile_complaints
,
17412 _("line number info header doesn't "
17413 "fit in `.debug_line' section"));
17415 discard_cleanups (back_to
);
17419 /* Subroutine of dwarf_decode_lines to simplify it.
17420 Return the file name of the psymtab for included file FILE_INDEX
17421 in line header LH of PST.
17422 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17423 If space for the result is malloc'd, it will be freed by a cleanup.
17424 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17426 The function creates dangling cleanup registration. */
17428 static const char *
17429 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17430 const struct partial_symtab
*pst
,
17431 const char *comp_dir
)
17433 const struct file_entry fe
= lh
->file_names
[file_index
];
17434 const char *include_name
= fe
.name
;
17435 const char *include_name_to_compare
= include_name
;
17436 const char *dir_name
= NULL
;
17437 const char *pst_filename
;
17438 char *copied_name
= NULL
;
17441 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17442 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17444 if (!IS_ABSOLUTE_PATH (include_name
)
17445 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17447 /* Avoid creating a duplicate psymtab for PST.
17448 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17449 Before we do the comparison, however, we need to account
17450 for DIR_NAME and COMP_DIR.
17451 First prepend dir_name (if non-NULL). If we still don't
17452 have an absolute path prepend comp_dir (if non-NULL).
17453 However, the directory we record in the include-file's
17454 psymtab does not contain COMP_DIR (to match the
17455 corresponding symtab(s)).
17460 bash$ gcc -g ./hello.c
17461 include_name = "hello.c"
17463 DW_AT_comp_dir = comp_dir = "/tmp"
17464 DW_AT_name = "./hello.c"
17468 if (dir_name
!= NULL
)
17470 char *tem
= concat (dir_name
, SLASH_STRING
,
17471 include_name
, (char *)NULL
);
17473 make_cleanup (xfree
, tem
);
17474 include_name
= tem
;
17475 include_name_to_compare
= include_name
;
17477 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17479 char *tem
= concat (comp_dir
, SLASH_STRING
,
17480 include_name
, (char *)NULL
);
17482 make_cleanup (xfree
, tem
);
17483 include_name_to_compare
= tem
;
17487 pst_filename
= pst
->filename
;
17488 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17490 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17491 pst_filename
, (char *)NULL
);
17492 pst_filename
= copied_name
;
17495 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17497 if (copied_name
!= NULL
)
17498 xfree (copied_name
);
17502 return include_name
;
17505 /* State machine to track the state of the line number program. */
17509 /* These are part of the standard DWARF line number state machine. */
17511 unsigned char op_index
;
17516 unsigned int discriminator
;
17518 /* Additional bits of state we need to track. */
17520 /* The last file that we called dwarf2_start_subfile for.
17521 This is only used for TLLs. */
17522 unsigned int last_file
;
17523 /* The last file a line number was recorded for. */
17524 struct subfile
*last_subfile
;
17526 /* The function to call to record a line. */
17527 record_line_ftype
*record_line
;
17529 /* The last line number that was recorded, used to coalesce
17530 consecutive entries for the same line. This can happen, for
17531 example, when discriminators are present. PR 17276. */
17532 unsigned int last_line
;
17533 int line_has_non_zero_discriminator
;
17534 } lnp_state_machine
;
17536 /* There's a lot of static state to pass to dwarf_record_line.
17537 This keeps it all together. */
17542 struct gdbarch
*gdbarch
;
17544 /* The line number header. */
17545 struct line_header
*line_header
;
17547 /* Non-zero if we're recording lines.
17548 Otherwise we're building partial symtabs and are just interested in
17549 finding include files mentioned by the line number program. */
17550 int record_lines_p
;
17551 } lnp_reader_state
;
17553 /* Ignore this record_line request. */
17556 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17561 /* Return non-zero if we should add LINE to the line number table.
17562 LINE is the line to add, LAST_LINE is the last line that was added,
17563 LAST_SUBFILE is the subfile for LAST_LINE.
17564 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17565 had a non-zero discriminator.
17567 We have to be careful in the presence of discriminators.
17568 E.g., for this line:
17570 for (i = 0; i < 100000; i++);
17572 clang can emit four line number entries for that one line,
17573 each with a different discriminator.
17574 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17576 However, we want gdb to coalesce all four entries into one.
17577 Otherwise the user could stepi into the middle of the line and
17578 gdb would get confused about whether the pc really was in the
17579 middle of the line.
17581 Things are further complicated by the fact that two consecutive
17582 line number entries for the same line is a heuristic used by gcc
17583 to denote the end of the prologue. So we can't just discard duplicate
17584 entries, we have to be selective about it. The heuristic we use is
17585 that we only collapse consecutive entries for the same line if at least
17586 one of those entries has a non-zero discriminator. PR 17276.
17588 Note: Addresses in the line number state machine can never go backwards
17589 within one sequence, thus this coalescing is ok. */
17592 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17593 int line_has_non_zero_discriminator
,
17594 struct subfile
*last_subfile
)
17596 if (current_subfile
!= last_subfile
)
17598 if (line
!= last_line
)
17600 /* Same line for the same file that we've seen already.
17601 As a last check, for pr 17276, only record the line if the line
17602 has never had a non-zero discriminator. */
17603 if (!line_has_non_zero_discriminator
)
17608 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17609 in the line table of subfile SUBFILE. */
17612 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17613 unsigned int line
, CORE_ADDR address
,
17614 record_line_ftype p_record_line
)
17616 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17618 if (dwarf_line_debug
)
17620 fprintf_unfiltered (gdb_stdlog
,
17621 "Recording line %u, file %s, address %s\n",
17622 line
, lbasename (subfile
->name
),
17623 paddress (gdbarch
, address
));
17626 (*p_record_line
) (subfile
, line
, addr
);
17629 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17630 Mark the end of a set of line number records.
17631 The arguments are the same as for dwarf_record_line_1.
17632 If SUBFILE is NULL the request is ignored. */
17635 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17636 CORE_ADDR address
, record_line_ftype p_record_line
)
17638 if (subfile
== NULL
)
17641 if (dwarf_line_debug
)
17643 fprintf_unfiltered (gdb_stdlog
,
17644 "Finishing current line, file %s, address %s\n",
17645 lbasename (subfile
->name
),
17646 paddress (gdbarch
, address
));
17649 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17652 /* Record the line in STATE.
17653 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17656 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17659 const struct line_header
*lh
= reader
->line_header
;
17660 unsigned int file
, line
, discriminator
;
17663 file
= state
->file
;
17664 line
= state
->line
;
17665 is_stmt
= state
->is_stmt
;
17666 discriminator
= state
->discriminator
;
17668 if (dwarf_line_debug
)
17670 fprintf_unfiltered (gdb_stdlog
,
17671 "Processing actual line %u: file %u,"
17672 " address %s, is_stmt %u, discrim %u\n",
17674 paddress (reader
->gdbarch
, state
->address
),
17675 is_stmt
, discriminator
);
17678 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17679 dwarf2_debug_line_missing_file_complaint ();
17680 /* For now we ignore lines not starting on an instruction boundary.
17681 But not when processing end_sequence for compatibility with the
17682 previous version of the code. */
17683 else if (state
->op_index
== 0 || end_sequence
)
17685 lh
->file_names
[file
- 1].included_p
= 1;
17686 if (reader
->record_lines_p
&& is_stmt
)
17688 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17690 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17691 state
->address
, state
->record_line
);
17696 if (dwarf_record_line_p (line
, state
->last_line
,
17697 state
->line_has_non_zero_discriminator
,
17698 state
->last_subfile
))
17700 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17701 line
, state
->address
,
17702 state
->record_line
);
17704 state
->last_subfile
= current_subfile
;
17705 state
->last_line
= line
;
17711 /* Initialize STATE for the start of a line number program. */
17714 init_lnp_state_machine (lnp_state_machine
*state
,
17715 const lnp_reader_state
*reader
)
17717 memset (state
, 0, sizeof (*state
));
17719 /* Just starting, there is no "last file". */
17720 state
->last_file
= 0;
17721 state
->last_subfile
= NULL
;
17723 state
->record_line
= record_line
;
17725 state
->last_line
= 0;
17726 state
->line_has_non_zero_discriminator
= 0;
17728 /* Initialize these according to the DWARF spec. */
17729 state
->op_index
= 0;
17732 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17733 was a line entry for it so that the backend has a chance to adjust it
17734 and also record it in case it needs it. This is currently used by MIPS
17735 code, cf. `mips_adjust_dwarf2_line'. */
17736 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17737 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17738 state
->discriminator
= 0;
17741 /* Check address and if invalid nop-out the rest of the lines in this
17745 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17746 const gdb_byte
*line_ptr
,
17747 CORE_ADDR lowpc
, CORE_ADDR address
)
17749 /* If address < lowpc then it's not a usable value, it's outside the
17750 pc range of the CU. However, we restrict the test to only address
17751 values of zero to preserve GDB's previous behaviour which is to
17752 handle the specific case of a function being GC'd by the linker. */
17754 if (address
== 0 && address
< lowpc
)
17756 /* This line table is for a function which has been
17757 GCd by the linker. Ignore it. PR gdb/12528 */
17759 struct objfile
*objfile
= cu
->objfile
;
17760 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17762 complaint (&symfile_complaints
,
17763 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17764 line_offset
, objfile_name (objfile
));
17765 state
->record_line
= noop_record_line
;
17766 /* Note: sm.record_line is left as noop_record_line
17767 until we see DW_LNE_end_sequence. */
17771 /* Subroutine of dwarf_decode_lines to simplify it.
17772 Process the line number information in LH.
17773 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17774 program in order to set included_p for every referenced header. */
17777 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17778 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17780 const gdb_byte
*line_ptr
, *extended_end
;
17781 const gdb_byte
*line_end
;
17782 unsigned int bytes_read
, extended_len
;
17783 unsigned char op_code
, extended_op
;
17784 CORE_ADDR baseaddr
;
17785 struct objfile
*objfile
= cu
->objfile
;
17786 bfd
*abfd
= objfile
->obfd
;
17787 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17788 /* Non-zero if we're recording line info (as opposed to building partial
17790 int record_lines_p
= !decode_for_pst_p
;
17791 /* A collection of things we need to pass to dwarf_record_line. */
17792 lnp_reader_state reader_state
;
17794 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17796 line_ptr
= lh
->statement_program_start
;
17797 line_end
= lh
->statement_program_end
;
17799 reader_state
.gdbarch
= gdbarch
;
17800 reader_state
.line_header
= lh
;
17801 reader_state
.record_lines_p
= record_lines_p
;
17803 /* Read the statement sequences until there's nothing left. */
17804 while (line_ptr
< line_end
)
17806 /* The DWARF line number program state machine. */
17807 lnp_state_machine state_machine
;
17808 int end_sequence
= 0;
17810 /* Reset the state machine at the start of each sequence. */
17811 init_lnp_state_machine (&state_machine
, &reader_state
);
17813 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17815 /* Start a subfile for the current file of the state machine. */
17816 /* lh->include_dirs and lh->file_names are 0-based, but the
17817 directory and file name numbers in the statement program
17819 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17820 const char *dir
= NULL
;
17822 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17823 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17825 dwarf2_start_subfile (fe
->name
, dir
);
17828 /* Decode the table. */
17829 while (line_ptr
< line_end
&& !end_sequence
)
17831 op_code
= read_1_byte (abfd
, line_ptr
);
17834 if (op_code
>= lh
->opcode_base
)
17836 /* Special opcode. */
17837 unsigned char adj_opcode
;
17838 CORE_ADDR addr_adj
;
17841 adj_opcode
= op_code
- lh
->opcode_base
;
17842 addr_adj
= (((state_machine
.op_index
17843 + (adj_opcode
/ lh
->line_range
))
17844 / lh
->maximum_ops_per_instruction
)
17845 * lh
->minimum_instruction_length
);
17846 state_machine
.address
17847 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17848 state_machine
.op_index
= ((state_machine
.op_index
17849 + (adj_opcode
/ lh
->line_range
))
17850 % lh
->maximum_ops_per_instruction
);
17851 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17852 state_machine
.line
+= line_delta
;
17853 if (line_delta
!= 0)
17854 state_machine
.line_has_non_zero_discriminator
17855 = state_machine
.discriminator
!= 0;
17857 dwarf_record_line (&reader_state
, &state_machine
, 0);
17858 state_machine
.discriminator
= 0;
17860 else switch (op_code
)
17862 case DW_LNS_extended_op
:
17863 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17865 line_ptr
+= bytes_read
;
17866 extended_end
= line_ptr
+ extended_len
;
17867 extended_op
= read_1_byte (abfd
, line_ptr
);
17869 switch (extended_op
)
17871 case DW_LNE_end_sequence
:
17872 state_machine
.record_line
= record_line
;
17875 case DW_LNE_set_address
:
17878 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17880 line_ptr
+= bytes_read
;
17881 check_line_address (cu
, &state_machine
, line_ptr
,
17883 state_machine
.op_index
= 0;
17884 address
+= baseaddr
;
17885 state_machine
.address
17886 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17889 case DW_LNE_define_file
:
17891 const char *cur_file
;
17892 unsigned int dir_index
, mod_time
, length
;
17894 cur_file
= read_direct_string (abfd
, line_ptr
,
17896 line_ptr
+= bytes_read
;
17898 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17899 line_ptr
+= bytes_read
;
17901 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17902 line_ptr
+= bytes_read
;
17904 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17905 line_ptr
+= bytes_read
;
17906 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17909 case DW_LNE_set_discriminator
:
17910 /* The discriminator is not interesting to the debugger;
17911 just ignore it. We still need to check its value though:
17912 if there are consecutive entries for the same
17913 (non-prologue) line we want to coalesce them.
17915 state_machine
.discriminator
17916 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17917 state_machine
.line_has_non_zero_discriminator
17918 |= state_machine
.discriminator
!= 0;
17919 line_ptr
+= bytes_read
;
17922 complaint (&symfile_complaints
,
17923 _("mangled .debug_line section"));
17926 /* Make sure that we parsed the extended op correctly. If e.g.
17927 we expected a different address size than the producer used,
17928 we may have read the wrong number of bytes. */
17929 if (line_ptr
!= extended_end
)
17931 complaint (&symfile_complaints
,
17932 _("mangled .debug_line section"));
17937 dwarf_record_line (&reader_state
, &state_machine
, 0);
17938 state_machine
.discriminator
= 0;
17940 case DW_LNS_advance_pc
:
17943 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17944 CORE_ADDR addr_adj
;
17946 addr_adj
= (((state_machine
.op_index
+ adjust
)
17947 / lh
->maximum_ops_per_instruction
)
17948 * lh
->minimum_instruction_length
);
17949 state_machine
.address
17950 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17951 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17952 % lh
->maximum_ops_per_instruction
);
17953 line_ptr
+= bytes_read
;
17956 case DW_LNS_advance_line
:
17959 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17961 state_machine
.line
+= line_delta
;
17962 if (line_delta
!= 0)
17963 state_machine
.line_has_non_zero_discriminator
17964 = state_machine
.discriminator
!= 0;
17965 line_ptr
+= bytes_read
;
17968 case DW_LNS_set_file
:
17970 /* The arrays lh->include_dirs and lh->file_names are
17971 0-based, but the directory and file name numbers in
17972 the statement program are 1-based. */
17973 struct file_entry
*fe
;
17974 const char *dir
= NULL
;
17976 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
17978 line_ptr
+= bytes_read
;
17979 if (state_machine
.file
== 0
17980 || state_machine
.file
- 1 >= lh
->num_file_names
)
17981 dwarf2_debug_line_missing_file_complaint ();
17984 fe
= &lh
->file_names
[state_machine
.file
- 1];
17985 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17986 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17987 if (record_lines_p
)
17989 state_machine
.last_subfile
= current_subfile
;
17990 state_machine
.line_has_non_zero_discriminator
17991 = state_machine
.discriminator
!= 0;
17992 dwarf2_start_subfile (fe
->name
, dir
);
17997 case DW_LNS_set_column
:
17998 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17999 line_ptr
+= bytes_read
;
18001 case DW_LNS_negate_stmt
:
18002 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18004 case DW_LNS_set_basic_block
:
18006 /* Add to the address register of the state machine the
18007 address increment value corresponding to special opcode
18008 255. I.e., this value is scaled by the minimum
18009 instruction length since special opcode 255 would have
18010 scaled the increment. */
18011 case DW_LNS_const_add_pc
:
18013 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18014 CORE_ADDR addr_adj
;
18016 addr_adj
= (((state_machine
.op_index
+ adjust
)
18017 / lh
->maximum_ops_per_instruction
)
18018 * lh
->minimum_instruction_length
);
18019 state_machine
.address
18020 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18021 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18022 % lh
->maximum_ops_per_instruction
);
18025 case DW_LNS_fixed_advance_pc
:
18027 CORE_ADDR addr_adj
;
18029 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18030 state_machine
.address
18031 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18032 state_machine
.op_index
= 0;
18038 /* Unknown standard opcode, ignore it. */
18041 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18043 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18044 line_ptr
+= bytes_read
;
18051 dwarf2_debug_line_missing_end_sequence_complaint ();
18053 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18054 in which case we still finish recording the last line). */
18055 dwarf_record_line (&reader_state
, &state_machine
, 1);
18059 /* Decode the Line Number Program (LNP) for the given line_header
18060 structure and CU. The actual information extracted and the type
18061 of structures created from the LNP depends on the value of PST.
18063 1. If PST is NULL, then this procedure uses the data from the program
18064 to create all necessary symbol tables, and their linetables.
18066 2. If PST is not NULL, this procedure reads the program to determine
18067 the list of files included by the unit represented by PST, and
18068 builds all the associated partial symbol tables.
18070 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18071 It is used for relative paths in the line table.
18072 NOTE: When processing partial symtabs (pst != NULL),
18073 comp_dir == pst->dirname.
18075 NOTE: It is important that psymtabs have the same file name (via strcmp)
18076 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18077 symtab we don't use it in the name of the psymtabs we create.
18078 E.g. expand_line_sal requires this when finding psymtabs to expand.
18079 A good testcase for this is mb-inline.exp.
18081 LOWPC is the lowest address in CU (or 0 if not known).
18083 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18084 for its PC<->lines mapping information. Otherwise only the filename
18085 table is read in. */
18088 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18089 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18090 CORE_ADDR lowpc
, int decode_mapping
)
18092 struct objfile
*objfile
= cu
->objfile
;
18093 const int decode_for_pst_p
= (pst
!= NULL
);
18095 if (decode_mapping
)
18096 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18098 if (decode_for_pst_p
)
18102 /* Now that we're done scanning the Line Header Program, we can
18103 create the psymtab of each included file. */
18104 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18105 if (lh
->file_names
[file_index
].included_p
== 1)
18107 const char *include_name
=
18108 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18109 if (include_name
!= NULL
)
18110 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18115 /* Make sure a symtab is created for every file, even files
18116 which contain only variables (i.e. no code with associated
18118 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18121 for (i
= 0; i
< lh
->num_file_names
; i
++)
18123 const char *dir
= NULL
;
18124 struct file_entry
*fe
;
18126 fe
= &lh
->file_names
[i
];
18127 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18128 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18129 dwarf2_start_subfile (fe
->name
, dir
);
18131 if (current_subfile
->symtab
== NULL
)
18133 current_subfile
->symtab
18134 = allocate_symtab (cust
, current_subfile
->name
);
18136 fe
->symtab
= current_subfile
->symtab
;
18141 /* Start a subfile for DWARF. FILENAME is the name of the file and
18142 DIRNAME the name of the source directory which contains FILENAME
18143 or NULL if not known.
18144 This routine tries to keep line numbers from identical absolute and
18145 relative file names in a common subfile.
18147 Using the `list' example from the GDB testsuite, which resides in
18148 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18149 of /srcdir/list0.c yields the following debugging information for list0.c:
18151 DW_AT_name: /srcdir/list0.c
18152 DW_AT_comp_dir: /compdir
18153 files.files[0].name: list0.h
18154 files.files[0].dir: /srcdir
18155 files.files[1].name: list0.c
18156 files.files[1].dir: /srcdir
18158 The line number information for list0.c has to end up in a single
18159 subfile, so that `break /srcdir/list0.c:1' works as expected.
18160 start_subfile will ensure that this happens provided that we pass the
18161 concatenation of files.files[1].dir and files.files[1].name as the
18165 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18169 /* In order not to lose the line information directory,
18170 we concatenate it to the filename when it makes sense.
18171 Note that the Dwarf3 standard says (speaking of filenames in line
18172 information): ``The directory index is ignored for file names
18173 that represent full path names''. Thus ignoring dirname in the
18174 `else' branch below isn't an issue. */
18176 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18178 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18182 start_subfile (filename
);
18188 /* Start a symtab for DWARF.
18189 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18191 static struct compunit_symtab
*
18192 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18193 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18195 struct compunit_symtab
*cust
18196 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18198 record_debugformat ("DWARF 2");
18199 record_producer (cu
->producer
);
18201 /* We assume that we're processing GCC output. */
18202 processing_gcc_compilation
= 2;
18204 cu
->processing_has_namespace_info
= 0;
18210 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18211 struct dwarf2_cu
*cu
)
18213 struct objfile
*objfile
= cu
->objfile
;
18214 struct comp_unit_head
*cu_header
= &cu
->header
;
18216 /* NOTE drow/2003-01-30: There used to be a comment and some special
18217 code here to turn a symbol with DW_AT_external and a
18218 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18219 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18220 with some versions of binutils) where shared libraries could have
18221 relocations against symbols in their debug information - the
18222 minimal symbol would have the right address, but the debug info
18223 would not. It's no longer necessary, because we will explicitly
18224 apply relocations when we read in the debug information now. */
18226 /* A DW_AT_location attribute with no contents indicates that a
18227 variable has been optimized away. */
18228 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18230 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18234 /* Handle one degenerate form of location expression specially, to
18235 preserve GDB's previous behavior when section offsets are
18236 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18237 then mark this symbol as LOC_STATIC. */
18239 if (attr_form_is_block (attr
)
18240 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18241 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18242 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18243 && (DW_BLOCK (attr
)->size
18244 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18246 unsigned int dummy
;
18248 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18249 SYMBOL_VALUE_ADDRESS (sym
) =
18250 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18252 SYMBOL_VALUE_ADDRESS (sym
) =
18253 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18254 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18255 fixup_symbol_section (sym
, objfile
);
18256 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18257 SYMBOL_SECTION (sym
));
18261 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18262 expression evaluator, and use LOC_COMPUTED only when necessary
18263 (i.e. when the value of a register or memory location is
18264 referenced, or a thread-local block, etc.). Then again, it might
18265 not be worthwhile. I'm assuming that it isn't unless performance
18266 or memory numbers show me otherwise. */
18268 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18270 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18271 cu
->has_loclist
= 1;
18274 /* Given a pointer to a DWARF information entry, figure out if we need
18275 to make a symbol table entry for it, and if so, create a new entry
18276 and return a pointer to it.
18277 If TYPE is NULL, determine symbol type from the die, otherwise
18278 used the passed type.
18279 If SPACE is not NULL, use it to hold the new symbol. If it is
18280 NULL, allocate a new symbol on the objfile's obstack. */
18282 static struct symbol
*
18283 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18284 struct symbol
*space
)
18286 struct objfile
*objfile
= cu
->objfile
;
18287 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18288 struct symbol
*sym
= NULL
;
18290 struct attribute
*attr
= NULL
;
18291 struct attribute
*attr2
= NULL
;
18292 CORE_ADDR baseaddr
;
18293 struct pending
**list_to_add
= NULL
;
18295 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18297 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18299 name
= dwarf2_name (die
, cu
);
18302 const char *linkagename
;
18303 int suppress_add
= 0;
18308 sym
= allocate_symbol (objfile
);
18309 OBJSTAT (objfile
, n_syms
++);
18311 /* Cache this symbol's name and the name's demangled form (if any). */
18312 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18313 linkagename
= dwarf2_physname (name
, die
, cu
);
18314 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18316 /* Fortran does not have mangling standard and the mangling does differ
18317 between gfortran, iFort etc. */
18318 if (cu
->language
== language_fortran
18319 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18320 symbol_set_demangled_name (&(sym
->ginfo
),
18321 dwarf2_full_name (name
, die
, cu
),
18324 /* Default assumptions.
18325 Use the passed type or decode it from the die. */
18326 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18327 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18329 SYMBOL_TYPE (sym
) = type
;
18331 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18332 attr
= dwarf2_attr (die
,
18333 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18337 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18340 attr
= dwarf2_attr (die
,
18341 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18345 int file_index
= DW_UNSND (attr
);
18347 if (cu
->line_header
== NULL
18348 || file_index
> cu
->line_header
->num_file_names
)
18349 complaint (&symfile_complaints
,
18350 _("file index out of range"));
18351 else if (file_index
> 0)
18353 struct file_entry
*fe
;
18355 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18356 symbol_set_symtab (sym
, fe
->symtab
);
18363 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18368 addr
= attr_value_as_address (attr
);
18369 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18370 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18372 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18373 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18374 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18375 add_symbol_to_list (sym
, cu
->list_in_scope
);
18377 case DW_TAG_subprogram
:
18378 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18380 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18381 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18382 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18383 || cu
->language
== language_ada
)
18385 /* Subprograms marked external are stored as a global symbol.
18386 Ada subprograms, whether marked external or not, are always
18387 stored as a global symbol, because we want to be able to
18388 access them globally. For instance, we want to be able
18389 to break on a nested subprogram without having to
18390 specify the context. */
18391 list_to_add
= &global_symbols
;
18395 list_to_add
= cu
->list_in_scope
;
18398 case DW_TAG_inlined_subroutine
:
18399 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18401 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18402 SYMBOL_INLINED (sym
) = 1;
18403 list_to_add
= cu
->list_in_scope
;
18405 case DW_TAG_template_value_param
:
18407 /* Fall through. */
18408 case DW_TAG_constant
:
18409 case DW_TAG_variable
:
18410 case DW_TAG_member
:
18411 /* Compilation with minimal debug info may result in
18412 variables with missing type entries. Change the
18413 misleading `void' type to something sensible. */
18414 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18416 = objfile_type (objfile
)->nodebug_data_symbol
;
18418 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18419 /* In the case of DW_TAG_member, we should only be called for
18420 static const members. */
18421 if (die
->tag
== DW_TAG_member
)
18423 /* dwarf2_add_field uses die_is_declaration,
18424 so we do the same. */
18425 gdb_assert (die_is_declaration (die
, cu
));
18430 dwarf2_const_value (attr
, sym
, cu
);
18431 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18434 if (attr2
&& (DW_UNSND (attr2
) != 0))
18435 list_to_add
= &global_symbols
;
18437 list_to_add
= cu
->list_in_scope
;
18441 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18444 var_decode_location (attr
, sym
, cu
);
18445 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18447 /* Fortran explicitly imports any global symbols to the local
18448 scope by DW_TAG_common_block. */
18449 if (cu
->language
== language_fortran
&& die
->parent
18450 && die
->parent
->tag
== DW_TAG_common_block
)
18453 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18454 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18455 && !dwarf2_per_objfile
->has_section_at_zero
)
18457 /* When a static variable is eliminated by the linker,
18458 the corresponding debug information is not stripped
18459 out, but the variable address is set to null;
18460 do not add such variables into symbol table. */
18462 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18464 /* Workaround gfortran PR debug/40040 - it uses
18465 DW_AT_location for variables in -fPIC libraries which may
18466 get overriden by other libraries/executable and get
18467 a different address. Resolve it by the minimal symbol
18468 which may come from inferior's executable using copy
18469 relocation. Make this workaround only for gfortran as for
18470 other compilers GDB cannot guess the minimal symbol
18471 Fortran mangling kind. */
18472 if (cu
->language
== language_fortran
&& die
->parent
18473 && die
->parent
->tag
== DW_TAG_module
18475 && startswith (cu
->producer
, "GNU Fortran "))
18476 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18478 /* A variable with DW_AT_external is never static,
18479 but it may be block-scoped. */
18480 list_to_add
= (cu
->list_in_scope
== &file_symbols
18481 ? &global_symbols
: cu
->list_in_scope
);
18484 list_to_add
= cu
->list_in_scope
;
18488 /* We do not know the address of this symbol.
18489 If it is an external symbol and we have type information
18490 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18491 The address of the variable will then be determined from
18492 the minimal symbol table whenever the variable is
18494 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18496 /* Fortran explicitly imports any global symbols to the local
18497 scope by DW_TAG_common_block. */
18498 if (cu
->language
== language_fortran
&& die
->parent
18499 && die
->parent
->tag
== DW_TAG_common_block
)
18501 /* SYMBOL_CLASS doesn't matter here because
18502 read_common_block is going to reset it. */
18504 list_to_add
= cu
->list_in_scope
;
18506 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18507 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18509 /* A variable with DW_AT_external is never static, but it
18510 may be block-scoped. */
18511 list_to_add
= (cu
->list_in_scope
== &file_symbols
18512 ? &global_symbols
: cu
->list_in_scope
);
18514 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18516 else if (!die_is_declaration (die
, cu
))
18518 /* Use the default LOC_OPTIMIZED_OUT class. */
18519 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18521 list_to_add
= cu
->list_in_scope
;
18525 case DW_TAG_formal_parameter
:
18526 /* If we are inside a function, mark this as an argument. If
18527 not, we might be looking at an argument to an inlined function
18528 when we do not have enough information to show inlined frames;
18529 pretend it's a local variable in that case so that the user can
18531 if (context_stack_depth
> 0
18532 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18533 SYMBOL_IS_ARGUMENT (sym
) = 1;
18534 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18537 var_decode_location (attr
, sym
, cu
);
18539 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18542 dwarf2_const_value (attr
, sym
, cu
);
18545 list_to_add
= cu
->list_in_scope
;
18547 case DW_TAG_unspecified_parameters
:
18548 /* From varargs functions; gdb doesn't seem to have any
18549 interest in this information, so just ignore it for now.
18552 case DW_TAG_template_type_param
:
18554 /* Fall through. */
18555 case DW_TAG_class_type
:
18556 case DW_TAG_interface_type
:
18557 case DW_TAG_structure_type
:
18558 case DW_TAG_union_type
:
18559 case DW_TAG_set_type
:
18560 case DW_TAG_enumeration_type
:
18561 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18562 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18565 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18566 really ever be static objects: otherwise, if you try
18567 to, say, break of a class's method and you're in a file
18568 which doesn't mention that class, it won't work unless
18569 the check for all static symbols in lookup_symbol_aux
18570 saves you. See the OtherFileClass tests in
18571 gdb.c++/namespace.exp. */
18575 list_to_add
= (cu
->list_in_scope
== &file_symbols
18576 && (cu
->language
== language_cplus
18577 || cu
->language
== language_java
)
18578 ? &global_symbols
: cu
->list_in_scope
);
18580 /* The semantics of C++ state that "struct foo {
18581 ... }" also defines a typedef for "foo". A Java
18582 class declaration also defines a typedef for the
18584 if (cu
->language
== language_cplus
18585 || cu
->language
== language_java
18586 || cu
->language
== language_ada
18587 || cu
->language
== language_d
)
18589 /* The symbol's name is already allocated along
18590 with this objfile, so we don't need to
18591 duplicate it for the type. */
18592 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18593 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18598 case DW_TAG_typedef
:
18599 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18600 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18601 list_to_add
= cu
->list_in_scope
;
18603 case DW_TAG_base_type
:
18604 case DW_TAG_subrange_type
:
18605 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18606 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18607 list_to_add
= cu
->list_in_scope
;
18609 case DW_TAG_enumerator
:
18610 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18613 dwarf2_const_value (attr
, sym
, cu
);
18616 /* NOTE: carlton/2003-11-10: See comment above in the
18617 DW_TAG_class_type, etc. block. */
18619 list_to_add
= (cu
->list_in_scope
== &file_symbols
18620 && (cu
->language
== language_cplus
18621 || cu
->language
== language_java
)
18622 ? &global_symbols
: cu
->list_in_scope
);
18625 case DW_TAG_imported_declaration
:
18626 case DW_TAG_namespace
:
18627 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18628 list_to_add
= &global_symbols
;
18630 case DW_TAG_module
:
18631 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18632 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18633 list_to_add
= &global_symbols
;
18635 case DW_TAG_common_block
:
18636 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18637 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18638 add_symbol_to_list (sym
, cu
->list_in_scope
);
18641 /* Not a tag we recognize. Hopefully we aren't processing
18642 trash data, but since we must specifically ignore things
18643 we don't recognize, there is nothing else we should do at
18645 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18646 dwarf_tag_name (die
->tag
));
18652 sym
->hash_next
= objfile
->template_symbols
;
18653 objfile
->template_symbols
= sym
;
18654 list_to_add
= NULL
;
18657 if (list_to_add
!= NULL
)
18658 add_symbol_to_list (sym
, list_to_add
);
18660 /* For the benefit of old versions of GCC, check for anonymous
18661 namespaces based on the demangled name. */
18662 if (!cu
->processing_has_namespace_info
18663 && cu
->language
== language_cplus
)
18664 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18669 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18671 static struct symbol
*
18672 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18674 return new_symbol_full (die
, type
, cu
, NULL
);
18677 /* Given an attr with a DW_FORM_dataN value in host byte order,
18678 zero-extend it as appropriate for the symbol's type. The DWARF
18679 standard (v4) is not entirely clear about the meaning of using
18680 DW_FORM_dataN for a constant with a signed type, where the type is
18681 wider than the data. The conclusion of a discussion on the DWARF
18682 list was that this is unspecified. We choose to always zero-extend
18683 because that is the interpretation long in use by GCC. */
18686 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18687 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18689 struct objfile
*objfile
= cu
->objfile
;
18690 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18691 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18692 LONGEST l
= DW_UNSND (attr
);
18694 if (bits
< sizeof (*value
) * 8)
18696 l
&= ((LONGEST
) 1 << bits
) - 1;
18699 else if (bits
== sizeof (*value
) * 8)
18703 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18704 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18711 /* Read a constant value from an attribute. Either set *VALUE, or if
18712 the value does not fit in *VALUE, set *BYTES - either already
18713 allocated on the objfile obstack, or newly allocated on OBSTACK,
18714 or, set *BATON, if we translated the constant to a location
18718 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18719 const char *name
, struct obstack
*obstack
,
18720 struct dwarf2_cu
*cu
,
18721 LONGEST
*value
, const gdb_byte
**bytes
,
18722 struct dwarf2_locexpr_baton
**baton
)
18724 struct objfile
*objfile
= cu
->objfile
;
18725 struct comp_unit_head
*cu_header
= &cu
->header
;
18726 struct dwarf_block
*blk
;
18727 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18728 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18734 switch (attr
->form
)
18737 case DW_FORM_GNU_addr_index
:
18741 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18742 dwarf2_const_value_length_mismatch_complaint (name
,
18743 cu_header
->addr_size
,
18744 TYPE_LENGTH (type
));
18745 /* Symbols of this form are reasonably rare, so we just
18746 piggyback on the existing location code rather than writing
18747 a new implementation of symbol_computed_ops. */
18748 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18749 (*baton
)->per_cu
= cu
->per_cu
;
18750 gdb_assert ((*baton
)->per_cu
);
18752 (*baton
)->size
= 2 + cu_header
->addr_size
;
18753 data
= obstack_alloc (obstack
, (*baton
)->size
);
18754 (*baton
)->data
= data
;
18756 data
[0] = DW_OP_addr
;
18757 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18758 byte_order
, DW_ADDR (attr
));
18759 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18762 case DW_FORM_string
:
18764 case DW_FORM_GNU_str_index
:
18765 case DW_FORM_GNU_strp_alt
:
18766 /* DW_STRING is already allocated on the objfile obstack, point
18768 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18770 case DW_FORM_block1
:
18771 case DW_FORM_block2
:
18772 case DW_FORM_block4
:
18773 case DW_FORM_block
:
18774 case DW_FORM_exprloc
:
18775 blk
= DW_BLOCK (attr
);
18776 if (TYPE_LENGTH (type
) != blk
->size
)
18777 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18778 TYPE_LENGTH (type
));
18779 *bytes
= blk
->data
;
18782 /* The DW_AT_const_value attributes are supposed to carry the
18783 symbol's value "represented as it would be on the target
18784 architecture." By the time we get here, it's already been
18785 converted to host endianness, so we just need to sign- or
18786 zero-extend it as appropriate. */
18787 case DW_FORM_data1
:
18788 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18790 case DW_FORM_data2
:
18791 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18793 case DW_FORM_data4
:
18794 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18796 case DW_FORM_data8
:
18797 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18800 case DW_FORM_sdata
:
18801 *value
= DW_SND (attr
);
18804 case DW_FORM_udata
:
18805 *value
= DW_UNSND (attr
);
18809 complaint (&symfile_complaints
,
18810 _("unsupported const value attribute form: '%s'"),
18811 dwarf_form_name (attr
->form
));
18818 /* Copy constant value from an attribute to a symbol. */
18821 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18822 struct dwarf2_cu
*cu
)
18824 struct objfile
*objfile
= cu
->objfile
;
18825 struct comp_unit_head
*cu_header
= &cu
->header
;
18827 const gdb_byte
*bytes
;
18828 struct dwarf2_locexpr_baton
*baton
;
18830 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18831 SYMBOL_PRINT_NAME (sym
),
18832 &objfile
->objfile_obstack
, cu
,
18833 &value
, &bytes
, &baton
);
18837 SYMBOL_LOCATION_BATON (sym
) = baton
;
18838 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18840 else if (bytes
!= NULL
)
18842 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18843 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18847 SYMBOL_VALUE (sym
) = value
;
18848 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18852 /* Return the type of the die in question using its DW_AT_type attribute. */
18854 static struct type
*
18855 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18857 struct attribute
*type_attr
;
18859 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18862 /* A missing DW_AT_type represents a void type. */
18863 return objfile_type (cu
->objfile
)->builtin_void
;
18866 return lookup_die_type (die
, type_attr
, cu
);
18869 /* True iff CU's producer generates GNAT Ada auxiliary information
18870 that allows to find parallel types through that information instead
18871 of having to do expensive parallel lookups by type name. */
18874 need_gnat_info (struct dwarf2_cu
*cu
)
18876 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18877 of GNAT produces this auxiliary information, without any indication
18878 that it is produced. Part of enhancing the FSF version of GNAT
18879 to produce that information will be to put in place an indicator
18880 that we can use in order to determine whether the descriptive type
18881 info is available or not. One suggestion that has been made is
18882 to use a new attribute, attached to the CU die. For now, assume
18883 that the descriptive type info is not available. */
18887 /* Return the auxiliary type of the die in question using its
18888 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18889 attribute is not present. */
18891 static struct type
*
18892 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18894 struct attribute
*type_attr
;
18896 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18900 return lookup_die_type (die
, type_attr
, cu
);
18903 /* If DIE has a descriptive_type attribute, then set the TYPE's
18904 descriptive type accordingly. */
18907 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18908 struct dwarf2_cu
*cu
)
18910 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18912 if (descriptive_type
)
18914 ALLOCATE_GNAT_AUX_TYPE (type
);
18915 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18919 /* Return the containing type of the die in question using its
18920 DW_AT_containing_type attribute. */
18922 static struct type
*
18923 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18925 struct attribute
*type_attr
;
18927 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18929 error (_("Dwarf Error: Problem turning containing type into gdb type "
18930 "[in module %s]"), objfile_name (cu
->objfile
));
18932 return lookup_die_type (die
, type_attr
, cu
);
18935 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18937 static struct type
*
18938 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18940 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18941 char *message
, *saved
;
18943 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18944 objfile_name (objfile
),
18945 cu
->header
.offset
.sect_off
,
18946 die
->offset
.sect_off
);
18947 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18948 message
, strlen (message
));
18951 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18954 /* Look up the type of DIE in CU using its type attribute ATTR.
18955 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18956 DW_AT_containing_type.
18957 If there is no type substitute an error marker. */
18959 static struct type
*
18960 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18961 struct dwarf2_cu
*cu
)
18963 struct objfile
*objfile
= cu
->objfile
;
18964 struct type
*this_type
;
18966 gdb_assert (attr
->name
== DW_AT_type
18967 || attr
->name
== DW_AT_GNAT_descriptive_type
18968 || attr
->name
== DW_AT_containing_type
);
18970 /* First see if we have it cached. */
18972 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18974 struct dwarf2_per_cu_data
*per_cu
;
18975 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18977 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18978 this_type
= get_die_type_at_offset (offset
, per_cu
);
18980 else if (attr_form_is_ref (attr
))
18982 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18984 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18986 else if (attr
->form
== DW_FORM_ref_sig8
)
18988 ULONGEST signature
= DW_SIGNATURE (attr
);
18990 return get_signatured_type (die
, signature
, cu
);
18994 complaint (&symfile_complaints
,
18995 _("Dwarf Error: Bad type attribute %s in DIE"
18996 " at 0x%x [in module %s]"),
18997 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18998 objfile_name (objfile
));
18999 return build_error_marker_type (cu
, die
);
19002 /* If not cached we need to read it in. */
19004 if (this_type
== NULL
)
19006 struct die_info
*type_die
= NULL
;
19007 struct dwarf2_cu
*type_cu
= cu
;
19009 if (attr_form_is_ref (attr
))
19010 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19011 if (type_die
== NULL
)
19012 return build_error_marker_type (cu
, die
);
19013 /* If we find the type now, it's probably because the type came
19014 from an inter-CU reference and the type's CU got expanded before
19016 this_type
= read_type_die (type_die
, type_cu
);
19019 /* If we still don't have a type use an error marker. */
19021 if (this_type
== NULL
)
19022 return build_error_marker_type (cu
, die
);
19027 /* Return the type in DIE, CU.
19028 Returns NULL for invalid types.
19030 This first does a lookup in die_type_hash,
19031 and only reads the die in if necessary.
19033 NOTE: This can be called when reading in partial or full symbols. */
19035 static struct type
*
19036 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19038 struct type
*this_type
;
19040 this_type
= get_die_type (die
, cu
);
19044 return read_type_die_1 (die
, cu
);
19047 /* Read the type in DIE, CU.
19048 Returns NULL for invalid types. */
19050 static struct type
*
19051 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19053 struct type
*this_type
= NULL
;
19057 case DW_TAG_class_type
:
19058 case DW_TAG_interface_type
:
19059 case DW_TAG_structure_type
:
19060 case DW_TAG_union_type
:
19061 this_type
= read_structure_type (die
, cu
);
19063 case DW_TAG_enumeration_type
:
19064 this_type
= read_enumeration_type (die
, cu
);
19066 case DW_TAG_subprogram
:
19067 case DW_TAG_subroutine_type
:
19068 case DW_TAG_inlined_subroutine
:
19069 this_type
= read_subroutine_type (die
, cu
);
19071 case DW_TAG_array_type
:
19072 this_type
= read_array_type (die
, cu
);
19074 case DW_TAG_set_type
:
19075 this_type
= read_set_type (die
, cu
);
19077 case DW_TAG_pointer_type
:
19078 this_type
= read_tag_pointer_type (die
, cu
);
19080 case DW_TAG_ptr_to_member_type
:
19081 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19083 case DW_TAG_reference_type
:
19084 this_type
= read_tag_reference_type (die
, cu
);
19086 case DW_TAG_const_type
:
19087 this_type
= read_tag_const_type (die
, cu
);
19089 case DW_TAG_volatile_type
:
19090 this_type
= read_tag_volatile_type (die
, cu
);
19092 case DW_TAG_restrict_type
:
19093 this_type
= read_tag_restrict_type (die
, cu
);
19095 case DW_TAG_string_type
:
19096 this_type
= read_tag_string_type (die
, cu
);
19098 case DW_TAG_typedef
:
19099 this_type
= read_typedef (die
, cu
);
19101 case DW_TAG_subrange_type
:
19102 this_type
= read_subrange_type (die
, cu
);
19104 case DW_TAG_base_type
:
19105 this_type
= read_base_type (die
, cu
);
19107 case DW_TAG_unspecified_type
:
19108 this_type
= read_unspecified_type (die
, cu
);
19110 case DW_TAG_namespace
:
19111 this_type
= read_namespace_type (die
, cu
);
19113 case DW_TAG_module
:
19114 this_type
= read_module_type (die
, cu
);
19116 case DW_TAG_atomic_type
:
19117 this_type
= read_tag_atomic_type (die
, cu
);
19120 complaint (&symfile_complaints
,
19121 _("unexpected tag in read_type_die: '%s'"),
19122 dwarf_tag_name (die
->tag
));
19129 /* See if we can figure out if the class lives in a namespace. We do
19130 this by looking for a member function; its demangled name will
19131 contain namespace info, if there is any.
19132 Return the computed name or NULL.
19133 Space for the result is allocated on the objfile's obstack.
19134 This is the full-die version of guess_partial_die_structure_name.
19135 In this case we know DIE has no useful parent. */
19138 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19140 struct die_info
*spec_die
;
19141 struct dwarf2_cu
*spec_cu
;
19142 struct die_info
*child
;
19145 spec_die
= die_specification (die
, &spec_cu
);
19146 if (spec_die
!= NULL
)
19152 for (child
= die
->child
;
19154 child
= child
->sibling
)
19156 if (child
->tag
== DW_TAG_subprogram
)
19158 struct attribute
*attr
;
19160 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
19162 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
19166 = language_class_name_from_physname (cu
->language_defn
,
19170 if (actual_name
!= NULL
)
19172 const char *die_name
= dwarf2_name (die
, cu
);
19174 if (die_name
!= NULL
19175 && strcmp (die_name
, actual_name
) != 0)
19177 /* Strip off the class name from the full name.
19178 We want the prefix. */
19179 int die_name_len
= strlen (die_name
);
19180 int actual_name_len
= strlen (actual_name
);
19182 /* Test for '::' as a sanity check. */
19183 if (actual_name_len
> die_name_len
+ 2
19184 && actual_name
[actual_name_len
19185 - die_name_len
- 1] == ':')
19187 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19189 actual_name_len
- die_name_len
- 2);
19192 xfree (actual_name
);
19201 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19202 prefix part in such case. See
19203 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19206 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19208 struct attribute
*attr
;
19211 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19212 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19215 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19216 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19219 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19221 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19222 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19225 /* dwarf2_name had to be already called. */
19226 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19228 /* Strip the base name, keep any leading namespaces/classes. */
19229 base
= strrchr (DW_STRING (attr
), ':');
19230 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19233 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19234 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
19237 /* Return the name of the namespace/class that DIE is defined within,
19238 or "" if we can't tell. The caller should not xfree the result.
19240 For example, if we're within the method foo() in the following
19250 then determine_prefix on foo's die will return "N::C". */
19252 static const char *
19253 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19255 struct die_info
*parent
, *spec_die
;
19256 struct dwarf2_cu
*spec_cu
;
19257 struct type
*parent_type
;
19260 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19261 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
)
19264 retval
= anonymous_struct_prefix (die
, cu
);
19268 /* We have to be careful in the presence of DW_AT_specification.
19269 For example, with GCC 3.4, given the code
19273 // Definition of N::foo.
19277 then we'll have a tree of DIEs like this:
19279 1: DW_TAG_compile_unit
19280 2: DW_TAG_namespace // N
19281 3: DW_TAG_subprogram // declaration of N::foo
19282 4: DW_TAG_subprogram // definition of N::foo
19283 DW_AT_specification // refers to die #3
19285 Thus, when processing die #4, we have to pretend that we're in
19286 the context of its DW_AT_specification, namely the contex of die
19289 spec_die
= die_specification (die
, &spec_cu
);
19290 if (spec_die
== NULL
)
19291 parent
= die
->parent
;
19294 parent
= spec_die
->parent
;
19298 if (parent
== NULL
)
19300 else if (parent
->building_fullname
)
19303 const char *parent_name
;
19305 /* It has been seen on RealView 2.2 built binaries,
19306 DW_TAG_template_type_param types actually _defined_ as
19307 children of the parent class:
19310 template class <class Enum> Class{};
19311 Class<enum E> class_e;
19313 1: DW_TAG_class_type (Class)
19314 2: DW_TAG_enumeration_type (E)
19315 3: DW_TAG_enumerator (enum1:0)
19316 3: DW_TAG_enumerator (enum2:1)
19318 2: DW_TAG_template_type_param
19319 DW_AT_type DW_FORM_ref_udata (E)
19321 Besides being broken debug info, it can put GDB into an
19322 infinite loop. Consider:
19324 When we're building the full name for Class<E>, we'll start
19325 at Class, and go look over its template type parameters,
19326 finding E. We'll then try to build the full name of E, and
19327 reach here. We're now trying to build the full name of E,
19328 and look over the parent DIE for containing scope. In the
19329 broken case, if we followed the parent DIE of E, we'd again
19330 find Class, and once again go look at its template type
19331 arguments, etc., etc. Simply don't consider such parent die
19332 as source-level parent of this die (it can't be, the language
19333 doesn't allow it), and break the loop here. */
19334 name
= dwarf2_name (die
, cu
);
19335 parent_name
= dwarf2_name (parent
, cu
);
19336 complaint (&symfile_complaints
,
19337 _("template param type '%s' defined within parent '%s'"),
19338 name
? name
: "<unknown>",
19339 parent_name
? parent_name
: "<unknown>");
19343 switch (parent
->tag
)
19345 case DW_TAG_namespace
:
19346 parent_type
= read_type_die (parent
, cu
);
19347 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19348 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19349 Work around this problem here. */
19350 if (cu
->language
== language_cplus
19351 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19353 /* We give a name to even anonymous namespaces. */
19354 return TYPE_TAG_NAME (parent_type
);
19355 case DW_TAG_class_type
:
19356 case DW_TAG_interface_type
:
19357 case DW_TAG_structure_type
:
19358 case DW_TAG_union_type
:
19359 case DW_TAG_module
:
19360 parent_type
= read_type_die (parent
, cu
);
19361 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19362 return TYPE_TAG_NAME (parent_type
);
19364 /* An anonymous structure is only allowed non-static data
19365 members; no typedefs, no member functions, et cetera.
19366 So it does not need a prefix. */
19368 case DW_TAG_compile_unit
:
19369 case DW_TAG_partial_unit
:
19370 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19371 if (cu
->language
== language_cplus
19372 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19373 && die
->child
!= NULL
19374 && (die
->tag
== DW_TAG_class_type
19375 || die
->tag
== DW_TAG_structure_type
19376 || die
->tag
== DW_TAG_union_type
))
19378 char *name
= guess_full_die_structure_name (die
, cu
);
19383 case DW_TAG_enumeration_type
:
19384 parent_type
= read_type_die (parent
, cu
);
19385 if (TYPE_DECLARED_CLASS (parent_type
))
19387 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19388 return TYPE_TAG_NAME (parent_type
);
19391 /* Fall through. */
19393 return determine_prefix (parent
, cu
);
19397 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19398 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19399 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19400 an obconcat, otherwise allocate storage for the result. The CU argument is
19401 used to determine the language and hence, the appropriate separator. */
19403 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19406 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19407 int physname
, struct dwarf2_cu
*cu
)
19409 const char *lead
= "";
19412 if (suffix
== NULL
|| suffix
[0] == '\0'
19413 || prefix
== NULL
|| prefix
[0] == '\0')
19415 else if (cu
->language
== language_java
)
19417 else if (cu
->language
== language_d
)
19419 /* For D, the 'main' function could be defined in any module, but it
19420 should never be prefixed. */
19421 if (strcmp (suffix
, "D main") == 0)
19429 else if (cu
->language
== language_fortran
&& physname
)
19431 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19432 DW_AT_MIPS_linkage_name is preferred and used instead. */
19440 if (prefix
== NULL
)
19442 if (suffix
== NULL
)
19448 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19450 strcpy (retval
, lead
);
19451 strcat (retval
, prefix
);
19452 strcat (retval
, sep
);
19453 strcat (retval
, suffix
);
19458 /* We have an obstack. */
19459 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19463 /* Return sibling of die, NULL if no sibling. */
19465 static struct die_info
*
19466 sibling_die (struct die_info
*die
)
19468 return die
->sibling
;
19471 /* Get name of a die, return NULL if not found. */
19473 static const char *
19474 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19475 struct obstack
*obstack
)
19477 if (name
&& cu
->language
== language_cplus
)
19479 char *canon_name
= cp_canonicalize_string (name
);
19481 if (canon_name
!= NULL
)
19483 if (strcmp (canon_name
, name
) != 0)
19484 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19485 xfree (canon_name
);
19492 /* Get name of a die, return NULL if not found.
19493 Anonymous namespaces are converted to their magic string. */
19495 static const char *
19496 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19498 struct attribute
*attr
;
19500 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19501 if ((!attr
|| !DW_STRING (attr
))
19502 && die
->tag
!= DW_TAG_namespace
19503 && die
->tag
!= DW_TAG_class_type
19504 && die
->tag
!= DW_TAG_interface_type
19505 && die
->tag
!= DW_TAG_structure_type
19506 && die
->tag
!= DW_TAG_union_type
)
19511 case DW_TAG_compile_unit
:
19512 case DW_TAG_partial_unit
:
19513 /* Compilation units have a DW_AT_name that is a filename, not
19514 a source language identifier. */
19515 case DW_TAG_enumeration_type
:
19516 case DW_TAG_enumerator
:
19517 /* These tags always have simple identifiers already; no need
19518 to canonicalize them. */
19519 return DW_STRING (attr
);
19521 case DW_TAG_namespace
:
19522 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19523 return DW_STRING (attr
);
19524 return CP_ANONYMOUS_NAMESPACE_STR
;
19526 case DW_TAG_subprogram
:
19527 /* Java constructors will all be named "<init>", so return
19528 the class name when we see this special case. */
19529 if (cu
->language
== language_java
19530 && DW_STRING (attr
) != NULL
19531 && strcmp (DW_STRING (attr
), "<init>") == 0)
19533 struct dwarf2_cu
*spec_cu
= cu
;
19534 struct die_info
*spec_die
;
19536 /* GCJ will output '<init>' for Java constructor names.
19537 For this special case, return the name of the parent class. */
19539 /* GCJ may output subprogram DIEs with AT_specification set.
19540 If so, use the name of the specified DIE. */
19541 spec_die
= die_specification (die
, &spec_cu
);
19542 if (spec_die
!= NULL
)
19543 return dwarf2_name (spec_die
, spec_cu
);
19548 if (die
->tag
== DW_TAG_class_type
)
19549 return dwarf2_name (die
, cu
);
19551 while (die
->tag
!= DW_TAG_compile_unit
19552 && die
->tag
!= DW_TAG_partial_unit
);
19556 case DW_TAG_class_type
:
19557 case DW_TAG_interface_type
:
19558 case DW_TAG_structure_type
:
19559 case DW_TAG_union_type
:
19560 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19561 structures or unions. These were of the form "._%d" in GCC 4.1,
19562 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19563 and GCC 4.4. We work around this problem by ignoring these. */
19564 if (attr
&& DW_STRING (attr
)
19565 && (startswith (DW_STRING (attr
), "._")
19566 || startswith (DW_STRING (attr
), "<anonymous")))
19569 /* GCC might emit a nameless typedef that has a linkage name. See
19570 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19571 if (!attr
|| DW_STRING (attr
) == NULL
)
19573 char *demangled
= NULL
;
19575 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19577 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19579 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19582 /* Avoid demangling DW_STRING (attr) the second time on a second
19583 call for the same DIE. */
19584 if (!DW_STRING_IS_CANONICAL (attr
))
19585 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19591 /* FIXME: we already did this for the partial symbol... */
19593 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19594 demangled
, strlen (demangled
));
19595 DW_STRING_IS_CANONICAL (attr
) = 1;
19598 /* Strip any leading namespaces/classes, keep only the base name.
19599 DW_AT_name for named DIEs does not contain the prefixes. */
19600 base
= strrchr (DW_STRING (attr
), ':');
19601 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19604 return DW_STRING (attr
);
19613 if (!DW_STRING_IS_CANONICAL (attr
))
19616 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19617 &cu
->objfile
->per_bfd
->storage_obstack
);
19618 DW_STRING_IS_CANONICAL (attr
) = 1;
19620 return DW_STRING (attr
);
19623 /* Return the die that this die in an extension of, or NULL if there
19624 is none. *EXT_CU is the CU containing DIE on input, and the CU
19625 containing the return value on output. */
19627 static struct die_info
*
19628 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19630 struct attribute
*attr
;
19632 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19636 return follow_die_ref (die
, attr
, ext_cu
);
19639 /* Convert a DIE tag into its string name. */
19641 static const char *
19642 dwarf_tag_name (unsigned tag
)
19644 const char *name
= get_DW_TAG_name (tag
);
19647 return "DW_TAG_<unknown>";
19652 /* Convert a DWARF attribute code into its string name. */
19654 static const char *
19655 dwarf_attr_name (unsigned attr
)
19659 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19660 if (attr
== DW_AT_MIPS_fde
)
19661 return "DW_AT_MIPS_fde";
19663 if (attr
== DW_AT_HP_block_index
)
19664 return "DW_AT_HP_block_index";
19667 name
= get_DW_AT_name (attr
);
19670 return "DW_AT_<unknown>";
19675 /* Convert a DWARF value form code into its string name. */
19677 static const char *
19678 dwarf_form_name (unsigned form
)
19680 const char *name
= get_DW_FORM_name (form
);
19683 return "DW_FORM_<unknown>";
19689 dwarf_bool_name (unsigned mybool
)
19697 /* Convert a DWARF type code into its string name. */
19699 static const char *
19700 dwarf_type_encoding_name (unsigned enc
)
19702 const char *name
= get_DW_ATE_name (enc
);
19705 return "DW_ATE_<unknown>";
19711 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19715 print_spaces (indent
, f
);
19716 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19717 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19719 if (die
->parent
!= NULL
)
19721 print_spaces (indent
, f
);
19722 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19723 die
->parent
->offset
.sect_off
);
19726 print_spaces (indent
, f
);
19727 fprintf_unfiltered (f
, " has children: %s\n",
19728 dwarf_bool_name (die
->child
!= NULL
));
19730 print_spaces (indent
, f
);
19731 fprintf_unfiltered (f
, " attributes:\n");
19733 for (i
= 0; i
< die
->num_attrs
; ++i
)
19735 print_spaces (indent
, f
);
19736 fprintf_unfiltered (f
, " %s (%s) ",
19737 dwarf_attr_name (die
->attrs
[i
].name
),
19738 dwarf_form_name (die
->attrs
[i
].form
));
19740 switch (die
->attrs
[i
].form
)
19743 case DW_FORM_GNU_addr_index
:
19744 fprintf_unfiltered (f
, "address: ");
19745 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19747 case DW_FORM_block2
:
19748 case DW_FORM_block4
:
19749 case DW_FORM_block
:
19750 case DW_FORM_block1
:
19751 fprintf_unfiltered (f
, "block: size %s",
19752 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19754 case DW_FORM_exprloc
:
19755 fprintf_unfiltered (f
, "expression: size %s",
19756 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19758 case DW_FORM_ref_addr
:
19759 fprintf_unfiltered (f
, "ref address: ");
19760 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19762 case DW_FORM_GNU_ref_alt
:
19763 fprintf_unfiltered (f
, "alt ref address: ");
19764 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19770 case DW_FORM_ref_udata
:
19771 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19772 (long) (DW_UNSND (&die
->attrs
[i
])));
19774 case DW_FORM_data1
:
19775 case DW_FORM_data2
:
19776 case DW_FORM_data4
:
19777 case DW_FORM_data8
:
19778 case DW_FORM_udata
:
19779 case DW_FORM_sdata
:
19780 fprintf_unfiltered (f
, "constant: %s",
19781 pulongest (DW_UNSND (&die
->attrs
[i
])));
19783 case DW_FORM_sec_offset
:
19784 fprintf_unfiltered (f
, "section offset: %s",
19785 pulongest (DW_UNSND (&die
->attrs
[i
])));
19787 case DW_FORM_ref_sig8
:
19788 fprintf_unfiltered (f
, "signature: %s",
19789 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19791 case DW_FORM_string
:
19793 case DW_FORM_GNU_str_index
:
19794 case DW_FORM_GNU_strp_alt
:
19795 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19796 DW_STRING (&die
->attrs
[i
])
19797 ? DW_STRING (&die
->attrs
[i
]) : "",
19798 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19801 if (DW_UNSND (&die
->attrs
[i
]))
19802 fprintf_unfiltered (f
, "flag: TRUE");
19804 fprintf_unfiltered (f
, "flag: FALSE");
19806 case DW_FORM_flag_present
:
19807 fprintf_unfiltered (f
, "flag: TRUE");
19809 case DW_FORM_indirect
:
19810 /* The reader will have reduced the indirect form to
19811 the "base form" so this form should not occur. */
19812 fprintf_unfiltered (f
,
19813 "unexpected attribute form: DW_FORM_indirect");
19816 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19817 die
->attrs
[i
].form
);
19820 fprintf_unfiltered (f
, "\n");
19825 dump_die_for_error (struct die_info
*die
)
19827 dump_die_shallow (gdb_stderr
, 0, die
);
19831 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19833 int indent
= level
* 4;
19835 gdb_assert (die
!= NULL
);
19837 if (level
>= max_level
)
19840 dump_die_shallow (f
, indent
, die
);
19842 if (die
->child
!= NULL
)
19844 print_spaces (indent
, f
);
19845 fprintf_unfiltered (f
, " Children:");
19846 if (level
+ 1 < max_level
)
19848 fprintf_unfiltered (f
, "\n");
19849 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19853 fprintf_unfiltered (f
,
19854 " [not printed, max nesting level reached]\n");
19858 if (die
->sibling
!= NULL
&& level
> 0)
19860 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19864 /* This is called from the pdie macro in gdbinit.in.
19865 It's not static so gcc will keep a copy callable from gdb. */
19868 dump_die (struct die_info
*die
, int max_level
)
19870 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19874 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19878 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19884 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19888 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19890 sect_offset retval
= { DW_UNSND (attr
) };
19892 if (attr_form_is_ref (attr
))
19895 retval
.sect_off
= 0;
19896 complaint (&symfile_complaints
,
19897 _("unsupported die ref attribute form: '%s'"),
19898 dwarf_form_name (attr
->form
));
19902 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19903 * the value held by the attribute is not constant. */
19906 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19908 if (attr
->form
== DW_FORM_sdata
)
19909 return DW_SND (attr
);
19910 else if (attr
->form
== DW_FORM_udata
19911 || attr
->form
== DW_FORM_data1
19912 || attr
->form
== DW_FORM_data2
19913 || attr
->form
== DW_FORM_data4
19914 || attr
->form
== DW_FORM_data8
)
19915 return DW_UNSND (attr
);
19918 complaint (&symfile_complaints
,
19919 _("Attribute value is not a constant (%s)"),
19920 dwarf_form_name (attr
->form
));
19921 return default_value
;
19925 /* Follow reference or signature attribute ATTR of SRC_DIE.
19926 On entry *REF_CU is the CU of SRC_DIE.
19927 On exit *REF_CU is the CU of the result. */
19929 static struct die_info
*
19930 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19931 struct dwarf2_cu
**ref_cu
)
19933 struct die_info
*die
;
19935 if (attr_form_is_ref (attr
))
19936 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19937 else if (attr
->form
== DW_FORM_ref_sig8
)
19938 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19941 dump_die_for_error (src_die
);
19942 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19943 objfile_name ((*ref_cu
)->objfile
));
19949 /* Follow reference OFFSET.
19950 On entry *REF_CU is the CU of the source die referencing OFFSET.
19951 On exit *REF_CU is the CU of the result.
19952 Returns NULL if OFFSET is invalid. */
19954 static struct die_info
*
19955 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19956 struct dwarf2_cu
**ref_cu
)
19958 struct die_info temp_die
;
19959 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19961 gdb_assert (cu
->per_cu
!= NULL
);
19965 if (cu
->per_cu
->is_debug_types
)
19967 /* .debug_types CUs cannot reference anything outside their CU.
19968 If they need to, they have to reference a signatured type via
19969 DW_FORM_ref_sig8. */
19970 if (! offset_in_cu_p (&cu
->header
, offset
))
19973 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19974 || ! offset_in_cu_p (&cu
->header
, offset
))
19976 struct dwarf2_per_cu_data
*per_cu
;
19978 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19981 /* If necessary, add it to the queue and load its DIEs. */
19982 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19983 load_full_comp_unit (per_cu
, cu
->language
);
19985 target_cu
= per_cu
->cu
;
19987 else if (cu
->dies
== NULL
)
19989 /* We're loading full DIEs during partial symbol reading. */
19990 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19991 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19994 *ref_cu
= target_cu
;
19995 temp_die
.offset
= offset
;
19996 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19999 /* Follow reference attribute ATTR of SRC_DIE.
20000 On entry *REF_CU is the CU of SRC_DIE.
20001 On exit *REF_CU is the CU of the result. */
20003 static struct die_info
*
20004 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20005 struct dwarf2_cu
**ref_cu
)
20007 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20008 struct dwarf2_cu
*cu
= *ref_cu
;
20009 struct die_info
*die
;
20011 die
= follow_die_offset (offset
,
20012 (attr
->form
== DW_FORM_GNU_ref_alt
20013 || cu
->per_cu
->is_dwz
),
20016 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20017 "at 0x%x [in module %s]"),
20018 offset
.sect_off
, src_die
->offset
.sect_off
,
20019 objfile_name (cu
->objfile
));
20024 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20025 Returned value is intended for DW_OP_call*. Returned
20026 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20028 struct dwarf2_locexpr_baton
20029 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20030 struct dwarf2_per_cu_data
*per_cu
,
20031 CORE_ADDR (*get_frame_pc
) (void *baton
),
20034 struct dwarf2_cu
*cu
;
20035 struct die_info
*die
;
20036 struct attribute
*attr
;
20037 struct dwarf2_locexpr_baton retval
;
20039 dw2_setup (per_cu
->objfile
);
20041 if (per_cu
->cu
== NULL
)
20046 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20047 Instead just throw an error, not much else we can do. */
20048 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20049 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20052 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20054 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20055 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20057 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20060 /* DWARF: "If there is no such attribute, then there is no effect.".
20061 DATA is ignored if SIZE is 0. */
20063 retval
.data
= NULL
;
20066 else if (attr_form_is_section_offset (attr
))
20068 struct dwarf2_loclist_baton loclist_baton
;
20069 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20072 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20074 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20076 retval
.size
= size
;
20080 if (!attr_form_is_block (attr
))
20081 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20082 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20083 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20085 retval
.data
= DW_BLOCK (attr
)->data
;
20086 retval
.size
= DW_BLOCK (attr
)->size
;
20088 retval
.per_cu
= cu
->per_cu
;
20090 age_cached_comp_units ();
20095 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20098 struct dwarf2_locexpr_baton
20099 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20100 struct dwarf2_per_cu_data
*per_cu
,
20101 CORE_ADDR (*get_frame_pc
) (void *baton
),
20104 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20106 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20109 /* Write a constant of a given type as target-ordered bytes into
20112 static const gdb_byte
*
20113 write_constant_as_bytes (struct obstack
*obstack
,
20114 enum bfd_endian byte_order
,
20121 *len
= TYPE_LENGTH (type
);
20122 result
= obstack_alloc (obstack
, *len
);
20123 store_unsigned_integer (result
, *len
, byte_order
, value
);
20128 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20129 pointer to the constant bytes and set LEN to the length of the
20130 data. If memory is needed, allocate it on OBSTACK. If the DIE
20131 does not have a DW_AT_const_value, return NULL. */
20134 dwarf2_fetch_constant_bytes (sect_offset offset
,
20135 struct dwarf2_per_cu_data
*per_cu
,
20136 struct obstack
*obstack
,
20139 struct dwarf2_cu
*cu
;
20140 struct die_info
*die
;
20141 struct attribute
*attr
;
20142 const gdb_byte
*result
= NULL
;
20145 enum bfd_endian byte_order
;
20147 dw2_setup (per_cu
->objfile
);
20149 if (per_cu
->cu
== NULL
)
20154 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20155 Instead just throw an error, not much else we can do. */
20156 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20157 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20160 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20162 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20163 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20166 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20170 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20171 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20173 switch (attr
->form
)
20176 case DW_FORM_GNU_addr_index
:
20180 *len
= cu
->header
.addr_size
;
20181 tem
= obstack_alloc (obstack
, *len
);
20182 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20186 case DW_FORM_string
:
20188 case DW_FORM_GNU_str_index
:
20189 case DW_FORM_GNU_strp_alt
:
20190 /* DW_STRING is already allocated on the objfile obstack, point
20192 result
= (const gdb_byte
*) DW_STRING (attr
);
20193 *len
= strlen (DW_STRING (attr
));
20195 case DW_FORM_block1
:
20196 case DW_FORM_block2
:
20197 case DW_FORM_block4
:
20198 case DW_FORM_block
:
20199 case DW_FORM_exprloc
:
20200 result
= DW_BLOCK (attr
)->data
;
20201 *len
= DW_BLOCK (attr
)->size
;
20204 /* The DW_AT_const_value attributes are supposed to carry the
20205 symbol's value "represented as it would be on the target
20206 architecture." By the time we get here, it's already been
20207 converted to host endianness, so we just need to sign- or
20208 zero-extend it as appropriate. */
20209 case DW_FORM_data1
:
20210 type
= die_type (die
, cu
);
20211 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20212 if (result
== NULL
)
20213 result
= write_constant_as_bytes (obstack
, byte_order
,
20216 case DW_FORM_data2
:
20217 type
= die_type (die
, cu
);
20218 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20219 if (result
== NULL
)
20220 result
= write_constant_as_bytes (obstack
, byte_order
,
20223 case DW_FORM_data4
:
20224 type
= die_type (die
, cu
);
20225 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20226 if (result
== NULL
)
20227 result
= write_constant_as_bytes (obstack
, byte_order
,
20230 case DW_FORM_data8
:
20231 type
= die_type (die
, cu
);
20232 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20233 if (result
== NULL
)
20234 result
= write_constant_as_bytes (obstack
, byte_order
,
20238 case DW_FORM_sdata
:
20239 type
= die_type (die
, cu
);
20240 result
= write_constant_as_bytes (obstack
, byte_order
,
20241 type
, DW_SND (attr
), len
);
20244 case DW_FORM_udata
:
20245 type
= die_type (die
, cu
);
20246 result
= write_constant_as_bytes (obstack
, byte_order
,
20247 type
, DW_UNSND (attr
), len
);
20251 complaint (&symfile_complaints
,
20252 _("unsupported const value attribute form: '%s'"),
20253 dwarf_form_name (attr
->form
));
20260 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20264 dwarf2_get_die_type (cu_offset die_offset
,
20265 struct dwarf2_per_cu_data
*per_cu
)
20267 sect_offset die_offset_sect
;
20269 dw2_setup (per_cu
->objfile
);
20271 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20272 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20275 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20276 On entry *REF_CU is the CU of SRC_DIE.
20277 On exit *REF_CU is the CU of the result.
20278 Returns NULL if the referenced DIE isn't found. */
20280 static struct die_info
*
20281 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20282 struct dwarf2_cu
**ref_cu
)
20284 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20285 struct die_info temp_die
;
20286 struct dwarf2_cu
*sig_cu
;
20287 struct die_info
*die
;
20289 /* While it might be nice to assert sig_type->type == NULL here,
20290 we can get here for DW_AT_imported_declaration where we need
20291 the DIE not the type. */
20293 /* If necessary, add it to the queue and load its DIEs. */
20295 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20296 read_signatured_type (sig_type
);
20298 sig_cu
= sig_type
->per_cu
.cu
;
20299 gdb_assert (sig_cu
!= NULL
);
20300 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20301 temp_die
.offset
= sig_type
->type_offset_in_section
;
20302 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20303 temp_die
.offset
.sect_off
);
20306 /* For .gdb_index version 7 keep track of included TUs.
20307 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20308 if (dwarf2_per_objfile
->index_table
!= NULL
20309 && dwarf2_per_objfile
->index_table
->version
<= 7)
20311 VEC_safe_push (dwarf2_per_cu_ptr
,
20312 (*ref_cu
)->per_cu
->imported_symtabs
,
20323 /* Follow signatured type referenced by ATTR in SRC_DIE.
20324 On entry *REF_CU is the CU of SRC_DIE.
20325 On exit *REF_CU is the CU of the result.
20326 The result is the DIE of the type.
20327 If the referenced type cannot be found an error is thrown. */
20329 static struct die_info
*
20330 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20331 struct dwarf2_cu
**ref_cu
)
20333 ULONGEST signature
= DW_SIGNATURE (attr
);
20334 struct signatured_type
*sig_type
;
20335 struct die_info
*die
;
20337 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20339 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20340 /* sig_type will be NULL if the signatured type is missing from
20342 if (sig_type
== NULL
)
20344 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20345 " from DIE at 0x%x [in module %s]"),
20346 hex_string (signature
), src_die
->offset
.sect_off
,
20347 objfile_name ((*ref_cu
)->objfile
));
20350 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20353 dump_die_for_error (src_die
);
20354 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20355 " from DIE at 0x%x [in module %s]"),
20356 hex_string (signature
), src_die
->offset
.sect_off
,
20357 objfile_name ((*ref_cu
)->objfile
));
20363 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20364 reading in and processing the type unit if necessary. */
20366 static struct type
*
20367 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20368 struct dwarf2_cu
*cu
)
20370 struct signatured_type
*sig_type
;
20371 struct dwarf2_cu
*type_cu
;
20372 struct die_info
*type_die
;
20375 sig_type
= lookup_signatured_type (cu
, signature
);
20376 /* sig_type will be NULL if the signatured type is missing from
20378 if (sig_type
== NULL
)
20380 complaint (&symfile_complaints
,
20381 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20382 " from DIE at 0x%x [in module %s]"),
20383 hex_string (signature
), die
->offset
.sect_off
,
20384 objfile_name (dwarf2_per_objfile
->objfile
));
20385 return build_error_marker_type (cu
, die
);
20388 /* If we already know the type we're done. */
20389 if (sig_type
->type
!= NULL
)
20390 return sig_type
->type
;
20393 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20394 if (type_die
!= NULL
)
20396 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20397 is created. This is important, for example, because for c++ classes
20398 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20399 type
= read_type_die (type_die
, type_cu
);
20402 complaint (&symfile_complaints
,
20403 _("Dwarf Error: Cannot build signatured type %s"
20404 " referenced from DIE at 0x%x [in module %s]"),
20405 hex_string (signature
), die
->offset
.sect_off
,
20406 objfile_name (dwarf2_per_objfile
->objfile
));
20407 type
= build_error_marker_type (cu
, die
);
20412 complaint (&symfile_complaints
,
20413 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20414 " from DIE at 0x%x [in module %s]"),
20415 hex_string (signature
), die
->offset
.sect_off
,
20416 objfile_name (dwarf2_per_objfile
->objfile
));
20417 type
= build_error_marker_type (cu
, die
);
20419 sig_type
->type
= type
;
20424 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20425 reading in and processing the type unit if necessary. */
20427 static struct type
*
20428 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20429 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20431 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20432 if (attr_form_is_ref (attr
))
20434 struct dwarf2_cu
*type_cu
= cu
;
20435 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20437 return read_type_die (type_die
, type_cu
);
20439 else if (attr
->form
== DW_FORM_ref_sig8
)
20441 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20445 complaint (&symfile_complaints
,
20446 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20447 " at 0x%x [in module %s]"),
20448 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20449 objfile_name (dwarf2_per_objfile
->objfile
));
20450 return build_error_marker_type (cu
, die
);
20454 /* Load the DIEs associated with type unit PER_CU into memory. */
20457 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20459 struct signatured_type
*sig_type
;
20461 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20462 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20464 /* We have the per_cu, but we need the signatured_type.
20465 Fortunately this is an easy translation. */
20466 gdb_assert (per_cu
->is_debug_types
);
20467 sig_type
= (struct signatured_type
*) per_cu
;
20469 gdb_assert (per_cu
->cu
== NULL
);
20471 read_signatured_type (sig_type
);
20473 gdb_assert (per_cu
->cu
!= NULL
);
20476 /* die_reader_func for read_signatured_type.
20477 This is identical to load_full_comp_unit_reader,
20478 but is kept separate for now. */
20481 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20482 const gdb_byte
*info_ptr
,
20483 struct die_info
*comp_unit_die
,
20487 struct dwarf2_cu
*cu
= reader
->cu
;
20489 gdb_assert (cu
->die_hash
== NULL
);
20491 htab_create_alloc_ex (cu
->header
.length
/ 12,
20495 &cu
->comp_unit_obstack
,
20496 hashtab_obstack_allocate
,
20497 dummy_obstack_deallocate
);
20500 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20501 &info_ptr
, comp_unit_die
);
20502 cu
->dies
= comp_unit_die
;
20503 /* comp_unit_die is not stored in die_hash, no need. */
20505 /* We try not to read any attributes in this function, because not
20506 all CUs needed for references have been loaded yet, and symbol
20507 table processing isn't initialized. But we have to set the CU language,
20508 or we won't be able to build types correctly.
20509 Similarly, if we do not read the producer, we can not apply
20510 producer-specific interpretation. */
20511 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20514 /* Read in a signatured type and build its CU and DIEs.
20515 If the type is a stub for the real type in a DWO file,
20516 read in the real type from the DWO file as well. */
20519 read_signatured_type (struct signatured_type
*sig_type
)
20521 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20523 gdb_assert (per_cu
->is_debug_types
);
20524 gdb_assert (per_cu
->cu
== NULL
);
20526 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20527 read_signatured_type_reader
, NULL
);
20528 sig_type
->per_cu
.tu_read
= 1;
20531 /* Decode simple location descriptions.
20532 Given a pointer to a dwarf block that defines a location, compute
20533 the location and return the value.
20535 NOTE drow/2003-11-18: This function is called in two situations
20536 now: for the address of static or global variables (partial symbols
20537 only) and for offsets into structures which are expected to be
20538 (more or less) constant. The partial symbol case should go away,
20539 and only the constant case should remain. That will let this
20540 function complain more accurately. A few special modes are allowed
20541 without complaint for global variables (for instance, global
20542 register values and thread-local values).
20544 A location description containing no operations indicates that the
20545 object is optimized out. The return value is 0 for that case.
20546 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20547 callers will only want a very basic result and this can become a
20550 Note that stack[0] is unused except as a default error return. */
20553 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20555 struct objfile
*objfile
= cu
->objfile
;
20557 size_t size
= blk
->size
;
20558 const gdb_byte
*data
= blk
->data
;
20559 CORE_ADDR stack
[64];
20561 unsigned int bytes_read
, unsnd
;
20567 stack
[++stacki
] = 0;
20606 stack
[++stacki
] = op
- DW_OP_lit0
;
20641 stack
[++stacki
] = op
- DW_OP_reg0
;
20643 dwarf2_complex_location_expr_complaint ();
20647 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20649 stack
[++stacki
] = unsnd
;
20651 dwarf2_complex_location_expr_complaint ();
20655 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20660 case DW_OP_const1u
:
20661 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20665 case DW_OP_const1s
:
20666 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20670 case DW_OP_const2u
:
20671 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20675 case DW_OP_const2s
:
20676 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20680 case DW_OP_const4u
:
20681 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20685 case DW_OP_const4s
:
20686 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20690 case DW_OP_const8u
:
20691 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20696 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20702 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20707 stack
[stacki
+ 1] = stack
[stacki
];
20712 stack
[stacki
- 1] += stack
[stacki
];
20716 case DW_OP_plus_uconst
:
20717 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20723 stack
[stacki
- 1] -= stack
[stacki
];
20728 /* If we're not the last op, then we definitely can't encode
20729 this using GDB's address_class enum. This is valid for partial
20730 global symbols, although the variable's address will be bogus
20733 dwarf2_complex_location_expr_complaint ();
20736 case DW_OP_GNU_push_tls_address
:
20737 /* The top of the stack has the offset from the beginning
20738 of the thread control block at which the variable is located. */
20739 /* Nothing should follow this operator, so the top of stack would
20741 /* This is valid for partial global symbols, but the variable's
20742 address will be bogus in the psymtab. Make it always at least
20743 non-zero to not look as a variable garbage collected by linker
20744 which have DW_OP_addr 0. */
20746 dwarf2_complex_location_expr_complaint ();
20750 case DW_OP_GNU_uninit
:
20753 case DW_OP_GNU_addr_index
:
20754 case DW_OP_GNU_const_index
:
20755 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20762 const char *name
= get_DW_OP_name (op
);
20765 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20768 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20772 return (stack
[stacki
]);
20775 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20776 outside of the allocated space. Also enforce minimum>0. */
20777 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20779 complaint (&symfile_complaints
,
20780 _("location description stack overflow"));
20786 complaint (&symfile_complaints
,
20787 _("location description stack underflow"));
20791 return (stack
[stacki
]);
20794 /* memory allocation interface */
20796 static struct dwarf_block
*
20797 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20799 struct dwarf_block
*blk
;
20801 blk
= (struct dwarf_block
*)
20802 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20806 static struct die_info
*
20807 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20809 struct die_info
*die
;
20810 size_t size
= sizeof (struct die_info
);
20813 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20815 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20816 memset (die
, 0, sizeof (struct die_info
));
20821 /* Macro support. */
20823 /* Return file name relative to the compilation directory of file number I in
20824 *LH's file name table. The result is allocated using xmalloc; the caller is
20825 responsible for freeing it. */
20828 file_file_name (int file
, struct line_header
*lh
)
20830 /* Is the file number a valid index into the line header's file name
20831 table? Remember that file numbers start with one, not zero. */
20832 if (1 <= file
&& file
<= lh
->num_file_names
)
20834 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20836 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20837 || lh
->include_dirs
== NULL
)
20838 return xstrdup (fe
->name
);
20839 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20844 /* The compiler produced a bogus file number. We can at least
20845 record the macro definitions made in the file, even if we
20846 won't be able to find the file by name. */
20847 char fake_name
[80];
20849 xsnprintf (fake_name
, sizeof (fake_name
),
20850 "<bad macro file number %d>", file
);
20852 complaint (&symfile_complaints
,
20853 _("bad file number in macro information (%d)"),
20856 return xstrdup (fake_name
);
20860 /* Return the full name of file number I in *LH's file name table.
20861 Use COMP_DIR as the name of the current directory of the
20862 compilation. The result is allocated using xmalloc; the caller is
20863 responsible for freeing it. */
20865 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20867 /* Is the file number a valid index into the line header's file name
20868 table? Remember that file numbers start with one, not zero. */
20869 if (1 <= file
&& file
<= lh
->num_file_names
)
20871 char *relative
= file_file_name (file
, lh
);
20873 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20875 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20878 return file_file_name (file
, lh
);
20882 static struct macro_source_file
*
20883 macro_start_file (int file
, int line
,
20884 struct macro_source_file
*current_file
,
20885 struct line_header
*lh
)
20887 /* File name relative to the compilation directory of this source file. */
20888 char *file_name
= file_file_name (file
, lh
);
20890 if (! current_file
)
20892 /* Note: We don't create a macro table for this compilation unit
20893 at all until we actually get a filename. */
20894 struct macro_table
*macro_table
= get_macro_table ();
20896 /* If we have no current file, then this must be the start_file
20897 directive for the compilation unit's main source file. */
20898 current_file
= macro_set_main (macro_table
, file_name
);
20899 macro_define_special (macro_table
);
20902 current_file
= macro_include (current_file
, line
, file_name
);
20906 return current_file
;
20910 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20911 followed by a null byte. */
20913 copy_string (const char *buf
, int len
)
20915 char *s
= xmalloc (len
+ 1);
20917 memcpy (s
, buf
, len
);
20923 static const char *
20924 consume_improper_spaces (const char *p
, const char *body
)
20928 complaint (&symfile_complaints
,
20929 _("macro definition contains spaces "
20930 "in formal argument list:\n`%s'"),
20942 parse_macro_definition (struct macro_source_file
*file
, int line
,
20947 /* The body string takes one of two forms. For object-like macro
20948 definitions, it should be:
20950 <macro name> " " <definition>
20952 For function-like macro definitions, it should be:
20954 <macro name> "() " <definition>
20956 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20958 Spaces may appear only where explicitly indicated, and in the
20961 The Dwarf 2 spec says that an object-like macro's name is always
20962 followed by a space, but versions of GCC around March 2002 omit
20963 the space when the macro's definition is the empty string.
20965 The Dwarf 2 spec says that there should be no spaces between the
20966 formal arguments in a function-like macro's formal argument list,
20967 but versions of GCC around March 2002 include spaces after the
20971 /* Find the extent of the macro name. The macro name is terminated
20972 by either a space or null character (for an object-like macro) or
20973 an opening paren (for a function-like macro). */
20974 for (p
= body
; *p
; p
++)
20975 if (*p
== ' ' || *p
== '(')
20978 if (*p
== ' ' || *p
== '\0')
20980 /* It's an object-like macro. */
20981 int name_len
= p
- body
;
20982 char *name
= copy_string (body
, name_len
);
20983 const char *replacement
;
20986 replacement
= body
+ name_len
+ 1;
20989 dwarf2_macro_malformed_definition_complaint (body
);
20990 replacement
= body
+ name_len
;
20993 macro_define_object (file
, line
, name
, replacement
);
20997 else if (*p
== '(')
20999 /* It's a function-like macro. */
21000 char *name
= copy_string (body
, p
- body
);
21003 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
21007 p
= consume_improper_spaces (p
, body
);
21009 /* Parse the formal argument list. */
21010 while (*p
&& *p
!= ')')
21012 /* Find the extent of the current argument name. */
21013 const char *arg_start
= p
;
21015 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21018 if (! *p
|| p
== arg_start
)
21019 dwarf2_macro_malformed_definition_complaint (body
);
21022 /* Make sure argv has room for the new argument. */
21023 if (argc
>= argv_size
)
21026 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
21029 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21032 p
= consume_improper_spaces (p
, body
);
21034 /* Consume the comma, if present. */
21039 p
= consume_improper_spaces (p
, body
);
21048 /* Perfectly formed definition, no complaints. */
21049 macro_define_function (file
, line
, name
,
21050 argc
, (const char **) argv
,
21052 else if (*p
== '\0')
21054 /* Complain, but do define it. */
21055 dwarf2_macro_malformed_definition_complaint (body
);
21056 macro_define_function (file
, line
, name
,
21057 argc
, (const char **) argv
,
21061 /* Just complain. */
21062 dwarf2_macro_malformed_definition_complaint (body
);
21065 /* Just complain. */
21066 dwarf2_macro_malformed_definition_complaint (body
);
21072 for (i
= 0; i
< argc
; i
++)
21078 dwarf2_macro_malformed_definition_complaint (body
);
21081 /* Skip some bytes from BYTES according to the form given in FORM.
21082 Returns the new pointer. */
21084 static const gdb_byte
*
21085 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21086 enum dwarf_form form
,
21087 unsigned int offset_size
,
21088 struct dwarf2_section_info
*section
)
21090 unsigned int bytes_read
;
21094 case DW_FORM_data1
:
21099 case DW_FORM_data2
:
21103 case DW_FORM_data4
:
21107 case DW_FORM_data8
:
21111 case DW_FORM_string
:
21112 read_direct_string (abfd
, bytes
, &bytes_read
);
21113 bytes
+= bytes_read
;
21116 case DW_FORM_sec_offset
:
21118 case DW_FORM_GNU_strp_alt
:
21119 bytes
+= offset_size
;
21122 case DW_FORM_block
:
21123 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21124 bytes
+= bytes_read
;
21127 case DW_FORM_block1
:
21128 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21130 case DW_FORM_block2
:
21131 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21133 case DW_FORM_block4
:
21134 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21137 case DW_FORM_sdata
:
21138 case DW_FORM_udata
:
21139 case DW_FORM_GNU_addr_index
:
21140 case DW_FORM_GNU_str_index
:
21141 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21144 dwarf2_section_buffer_overflow_complaint (section
);
21152 complaint (&symfile_complaints
,
21153 _("invalid form 0x%x in `%s'"),
21154 form
, get_section_name (section
));
21162 /* A helper for dwarf_decode_macros that handles skipping an unknown
21163 opcode. Returns an updated pointer to the macro data buffer; or,
21164 on error, issues a complaint and returns NULL. */
21166 static const gdb_byte
*
21167 skip_unknown_opcode (unsigned int opcode
,
21168 const gdb_byte
**opcode_definitions
,
21169 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21171 unsigned int offset_size
,
21172 struct dwarf2_section_info
*section
)
21174 unsigned int bytes_read
, i
;
21176 const gdb_byte
*defn
;
21178 if (opcode_definitions
[opcode
] == NULL
)
21180 complaint (&symfile_complaints
,
21181 _("unrecognized DW_MACFINO opcode 0x%x"),
21186 defn
= opcode_definitions
[opcode
];
21187 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21188 defn
+= bytes_read
;
21190 for (i
= 0; i
< arg
; ++i
)
21192 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21193 (enum dwarf_form
) defn
[i
], offset_size
,
21195 if (mac_ptr
== NULL
)
21197 /* skip_form_bytes already issued the complaint. */
21205 /* A helper function which parses the header of a macro section.
21206 If the macro section is the extended (for now called "GNU") type,
21207 then this updates *OFFSET_SIZE. Returns a pointer to just after
21208 the header, or issues a complaint and returns NULL on error. */
21210 static const gdb_byte
*
21211 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21213 const gdb_byte
*mac_ptr
,
21214 unsigned int *offset_size
,
21215 int section_is_gnu
)
21217 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21219 if (section_is_gnu
)
21221 unsigned int version
, flags
;
21223 version
= read_2_bytes (abfd
, mac_ptr
);
21226 complaint (&symfile_complaints
,
21227 _("unrecognized version `%d' in .debug_macro section"),
21233 flags
= read_1_byte (abfd
, mac_ptr
);
21235 *offset_size
= (flags
& 1) ? 8 : 4;
21237 if ((flags
& 2) != 0)
21238 /* We don't need the line table offset. */
21239 mac_ptr
+= *offset_size
;
21241 /* Vendor opcode descriptions. */
21242 if ((flags
& 4) != 0)
21244 unsigned int i
, count
;
21246 count
= read_1_byte (abfd
, mac_ptr
);
21248 for (i
= 0; i
< count
; ++i
)
21250 unsigned int opcode
, bytes_read
;
21253 opcode
= read_1_byte (abfd
, mac_ptr
);
21255 opcode_definitions
[opcode
] = mac_ptr
;
21256 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21257 mac_ptr
+= bytes_read
;
21266 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21267 including DW_MACRO_GNU_transparent_include. */
21270 dwarf_decode_macro_bytes (bfd
*abfd
,
21271 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21272 struct macro_source_file
*current_file
,
21273 struct line_header
*lh
,
21274 struct dwarf2_section_info
*section
,
21275 int section_is_gnu
, int section_is_dwz
,
21276 unsigned int offset_size
,
21277 htab_t include_hash
)
21279 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21280 enum dwarf_macro_record_type macinfo_type
;
21281 int at_commandline
;
21282 const gdb_byte
*opcode_definitions
[256];
21284 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21285 &offset_size
, section_is_gnu
);
21286 if (mac_ptr
== NULL
)
21288 /* We already issued a complaint. */
21292 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21293 GDB is still reading the definitions from command line. First
21294 DW_MACINFO_start_file will need to be ignored as it was already executed
21295 to create CURRENT_FILE for the main source holding also the command line
21296 definitions. On first met DW_MACINFO_start_file this flag is reset to
21297 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21299 at_commandline
= 1;
21303 /* Do we at least have room for a macinfo type byte? */
21304 if (mac_ptr
>= mac_end
)
21306 dwarf2_section_buffer_overflow_complaint (section
);
21310 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21313 /* Note that we rely on the fact that the corresponding GNU and
21314 DWARF constants are the same. */
21315 switch (macinfo_type
)
21317 /* A zero macinfo type indicates the end of the macro
21322 case DW_MACRO_GNU_define
:
21323 case DW_MACRO_GNU_undef
:
21324 case DW_MACRO_GNU_define_indirect
:
21325 case DW_MACRO_GNU_undef_indirect
:
21326 case DW_MACRO_GNU_define_indirect_alt
:
21327 case DW_MACRO_GNU_undef_indirect_alt
:
21329 unsigned int bytes_read
;
21334 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21335 mac_ptr
+= bytes_read
;
21337 if (macinfo_type
== DW_MACRO_GNU_define
21338 || macinfo_type
== DW_MACRO_GNU_undef
)
21340 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21341 mac_ptr
+= bytes_read
;
21345 LONGEST str_offset
;
21347 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21348 mac_ptr
+= offset_size
;
21350 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21351 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21354 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21356 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21359 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21362 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21363 || macinfo_type
== DW_MACRO_GNU_define_indirect
21364 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21365 if (! current_file
)
21367 /* DWARF violation as no main source is present. */
21368 complaint (&symfile_complaints
,
21369 _("debug info with no main source gives macro %s "
21371 is_define
? _("definition") : _("undefinition"),
21375 if ((line
== 0 && !at_commandline
)
21376 || (line
!= 0 && at_commandline
))
21377 complaint (&symfile_complaints
,
21378 _("debug info gives %s macro %s with %s line %d: %s"),
21379 at_commandline
? _("command-line") : _("in-file"),
21380 is_define
? _("definition") : _("undefinition"),
21381 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21384 parse_macro_definition (current_file
, line
, body
);
21387 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21388 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21389 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21390 macro_undef (current_file
, line
, body
);
21395 case DW_MACRO_GNU_start_file
:
21397 unsigned int bytes_read
;
21400 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21401 mac_ptr
+= bytes_read
;
21402 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21403 mac_ptr
+= bytes_read
;
21405 if ((line
== 0 && !at_commandline
)
21406 || (line
!= 0 && at_commandline
))
21407 complaint (&symfile_complaints
,
21408 _("debug info gives source %d included "
21409 "from %s at %s line %d"),
21410 file
, at_commandline
? _("command-line") : _("file"),
21411 line
== 0 ? _("zero") : _("non-zero"), line
);
21413 if (at_commandline
)
21415 /* This DW_MACRO_GNU_start_file was executed in the
21417 at_commandline
= 0;
21420 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21424 case DW_MACRO_GNU_end_file
:
21425 if (! current_file
)
21426 complaint (&symfile_complaints
,
21427 _("macro debug info has an unmatched "
21428 "`close_file' directive"));
21431 current_file
= current_file
->included_by
;
21432 if (! current_file
)
21434 enum dwarf_macro_record_type next_type
;
21436 /* GCC circa March 2002 doesn't produce the zero
21437 type byte marking the end of the compilation
21438 unit. Complain if it's not there, but exit no
21441 /* Do we at least have room for a macinfo type byte? */
21442 if (mac_ptr
>= mac_end
)
21444 dwarf2_section_buffer_overflow_complaint (section
);
21448 /* We don't increment mac_ptr here, so this is just
21451 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21453 if (next_type
!= 0)
21454 complaint (&symfile_complaints
,
21455 _("no terminating 0-type entry for "
21456 "macros in `.debug_macinfo' section"));
21463 case DW_MACRO_GNU_transparent_include
:
21464 case DW_MACRO_GNU_transparent_include_alt
:
21468 bfd
*include_bfd
= abfd
;
21469 struct dwarf2_section_info
*include_section
= section
;
21470 struct dwarf2_section_info alt_section
;
21471 const gdb_byte
*include_mac_end
= mac_end
;
21472 int is_dwz
= section_is_dwz
;
21473 const gdb_byte
*new_mac_ptr
;
21475 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21476 mac_ptr
+= offset_size
;
21478 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21480 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21482 dwarf2_read_section (objfile
, &dwz
->macro
);
21484 include_section
= &dwz
->macro
;
21485 include_bfd
= get_section_bfd_owner (include_section
);
21486 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21490 new_mac_ptr
= include_section
->buffer
+ offset
;
21491 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21495 /* This has actually happened; see
21496 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21497 complaint (&symfile_complaints
,
21498 _("recursive DW_MACRO_GNU_transparent_include in "
21499 ".debug_macro section"));
21503 *slot
= (void *) new_mac_ptr
;
21505 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21506 include_mac_end
, current_file
, lh
,
21507 section
, section_is_gnu
, is_dwz
,
21508 offset_size
, include_hash
);
21510 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21515 case DW_MACINFO_vendor_ext
:
21516 if (!section_is_gnu
)
21518 unsigned int bytes_read
;
21521 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21522 mac_ptr
+= bytes_read
;
21523 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21524 mac_ptr
+= bytes_read
;
21526 /* We don't recognize any vendor extensions. */
21532 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21533 mac_ptr
, mac_end
, abfd
, offset_size
,
21535 if (mac_ptr
== NULL
)
21539 } while (macinfo_type
!= 0);
21543 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21544 int section_is_gnu
)
21546 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21547 struct line_header
*lh
= cu
->line_header
;
21549 const gdb_byte
*mac_ptr
, *mac_end
;
21550 struct macro_source_file
*current_file
= 0;
21551 enum dwarf_macro_record_type macinfo_type
;
21552 unsigned int offset_size
= cu
->header
.offset_size
;
21553 const gdb_byte
*opcode_definitions
[256];
21554 struct cleanup
*cleanup
;
21555 htab_t include_hash
;
21557 struct dwarf2_section_info
*section
;
21558 const char *section_name
;
21560 if (cu
->dwo_unit
!= NULL
)
21562 if (section_is_gnu
)
21564 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21565 section_name
= ".debug_macro.dwo";
21569 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21570 section_name
= ".debug_macinfo.dwo";
21575 if (section_is_gnu
)
21577 section
= &dwarf2_per_objfile
->macro
;
21578 section_name
= ".debug_macro";
21582 section
= &dwarf2_per_objfile
->macinfo
;
21583 section_name
= ".debug_macinfo";
21587 dwarf2_read_section (objfile
, section
);
21588 if (section
->buffer
== NULL
)
21590 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21593 abfd
= get_section_bfd_owner (section
);
21595 /* First pass: Find the name of the base filename.
21596 This filename is needed in order to process all macros whose definition
21597 (or undefinition) comes from the command line. These macros are defined
21598 before the first DW_MACINFO_start_file entry, and yet still need to be
21599 associated to the base file.
21601 To determine the base file name, we scan the macro definitions until we
21602 reach the first DW_MACINFO_start_file entry. We then initialize
21603 CURRENT_FILE accordingly so that any macro definition found before the
21604 first DW_MACINFO_start_file can still be associated to the base file. */
21606 mac_ptr
= section
->buffer
+ offset
;
21607 mac_end
= section
->buffer
+ section
->size
;
21609 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21610 &offset_size
, section_is_gnu
);
21611 if (mac_ptr
== NULL
)
21613 /* We already issued a complaint. */
21619 /* Do we at least have room for a macinfo type byte? */
21620 if (mac_ptr
>= mac_end
)
21622 /* Complaint is printed during the second pass as GDB will probably
21623 stop the first pass earlier upon finding
21624 DW_MACINFO_start_file. */
21628 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21631 /* Note that we rely on the fact that the corresponding GNU and
21632 DWARF constants are the same. */
21633 switch (macinfo_type
)
21635 /* A zero macinfo type indicates the end of the macro
21640 case DW_MACRO_GNU_define
:
21641 case DW_MACRO_GNU_undef
:
21642 /* Only skip the data by MAC_PTR. */
21644 unsigned int bytes_read
;
21646 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21647 mac_ptr
+= bytes_read
;
21648 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21649 mac_ptr
+= bytes_read
;
21653 case DW_MACRO_GNU_start_file
:
21655 unsigned int bytes_read
;
21658 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21659 mac_ptr
+= bytes_read
;
21660 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21661 mac_ptr
+= bytes_read
;
21663 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21667 case DW_MACRO_GNU_end_file
:
21668 /* No data to skip by MAC_PTR. */
21671 case DW_MACRO_GNU_define_indirect
:
21672 case DW_MACRO_GNU_undef_indirect
:
21673 case DW_MACRO_GNU_define_indirect_alt
:
21674 case DW_MACRO_GNU_undef_indirect_alt
:
21676 unsigned int bytes_read
;
21678 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21679 mac_ptr
+= bytes_read
;
21680 mac_ptr
+= offset_size
;
21684 case DW_MACRO_GNU_transparent_include
:
21685 case DW_MACRO_GNU_transparent_include_alt
:
21686 /* Note that, according to the spec, a transparent include
21687 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21688 skip this opcode. */
21689 mac_ptr
+= offset_size
;
21692 case DW_MACINFO_vendor_ext
:
21693 /* Only skip the data by MAC_PTR. */
21694 if (!section_is_gnu
)
21696 unsigned int bytes_read
;
21698 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21699 mac_ptr
+= bytes_read
;
21700 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21701 mac_ptr
+= bytes_read
;
21706 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21707 mac_ptr
, mac_end
, abfd
, offset_size
,
21709 if (mac_ptr
== NULL
)
21713 } while (macinfo_type
!= 0 && current_file
== NULL
);
21715 /* Second pass: Process all entries.
21717 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21718 command-line macro definitions/undefinitions. This flag is unset when we
21719 reach the first DW_MACINFO_start_file entry. */
21721 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21722 NULL
, xcalloc
, xfree
);
21723 cleanup
= make_cleanup_htab_delete (include_hash
);
21724 mac_ptr
= section
->buffer
+ offset
;
21725 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21726 *slot
= (void *) mac_ptr
;
21727 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21728 current_file
, lh
, section
,
21729 section_is_gnu
, 0, offset_size
, include_hash
);
21730 do_cleanups (cleanup
);
21733 /* Check if the attribute's form is a DW_FORM_block*
21734 if so return true else false. */
21737 attr_form_is_block (const struct attribute
*attr
)
21739 return (attr
== NULL
? 0 :
21740 attr
->form
== DW_FORM_block1
21741 || attr
->form
== DW_FORM_block2
21742 || attr
->form
== DW_FORM_block4
21743 || attr
->form
== DW_FORM_block
21744 || attr
->form
== DW_FORM_exprloc
);
21747 /* Return non-zero if ATTR's value is a section offset --- classes
21748 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21749 You may use DW_UNSND (attr) to retrieve such offsets.
21751 Section 7.5.4, "Attribute Encodings", explains that no attribute
21752 may have a value that belongs to more than one of these classes; it
21753 would be ambiguous if we did, because we use the same forms for all
21757 attr_form_is_section_offset (const struct attribute
*attr
)
21759 return (attr
->form
== DW_FORM_data4
21760 || attr
->form
== DW_FORM_data8
21761 || attr
->form
== DW_FORM_sec_offset
);
21764 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21765 zero otherwise. When this function returns true, you can apply
21766 dwarf2_get_attr_constant_value to it.
21768 However, note that for some attributes you must check
21769 attr_form_is_section_offset before using this test. DW_FORM_data4
21770 and DW_FORM_data8 are members of both the constant class, and of
21771 the classes that contain offsets into other debug sections
21772 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21773 that, if an attribute's can be either a constant or one of the
21774 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21775 taken as section offsets, not constants. */
21778 attr_form_is_constant (const struct attribute
*attr
)
21780 switch (attr
->form
)
21782 case DW_FORM_sdata
:
21783 case DW_FORM_udata
:
21784 case DW_FORM_data1
:
21785 case DW_FORM_data2
:
21786 case DW_FORM_data4
:
21787 case DW_FORM_data8
:
21795 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21796 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21799 attr_form_is_ref (const struct attribute
*attr
)
21801 switch (attr
->form
)
21803 case DW_FORM_ref_addr
:
21808 case DW_FORM_ref_udata
:
21809 case DW_FORM_GNU_ref_alt
:
21816 /* Return the .debug_loc section to use for CU.
21817 For DWO files use .debug_loc.dwo. */
21819 static struct dwarf2_section_info
*
21820 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21823 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21824 return &dwarf2_per_objfile
->loc
;
21827 /* A helper function that fills in a dwarf2_loclist_baton. */
21830 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21831 struct dwarf2_loclist_baton
*baton
,
21832 const struct attribute
*attr
)
21834 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21836 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21838 baton
->per_cu
= cu
->per_cu
;
21839 gdb_assert (baton
->per_cu
);
21840 /* We don't know how long the location list is, but make sure we
21841 don't run off the edge of the section. */
21842 baton
->size
= section
->size
- DW_UNSND (attr
);
21843 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21844 baton
->base_address
= cu
->base_address
;
21845 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21849 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21850 struct dwarf2_cu
*cu
, int is_block
)
21852 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21853 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21855 if (attr_form_is_section_offset (attr
)
21856 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21857 the section. If so, fall through to the complaint in the
21859 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21861 struct dwarf2_loclist_baton
*baton
;
21863 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21864 sizeof (struct dwarf2_loclist_baton
));
21866 fill_in_loclist_baton (cu
, baton
, attr
);
21868 if (cu
->base_known
== 0)
21869 complaint (&symfile_complaints
,
21870 _("Location list used without "
21871 "specifying the CU base address."));
21873 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21874 ? dwarf2_loclist_block_index
21875 : dwarf2_loclist_index
);
21876 SYMBOL_LOCATION_BATON (sym
) = baton
;
21880 struct dwarf2_locexpr_baton
*baton
;
21882 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21883 sizeof (struct dwarf2_locexpr_baton
));
21884 baton
->per_cu
= cu
->per_cu
;
21885 gdb_assert (baton
->per_cu
);
21887 if (attr_form_is_block (attr
))
21889 /* Note that we're just copying the block's data pointer
21890 here, not the actual data. We're still pointing into the
21891 info_buffer for SYM's objfile; right now we never release
21892 that buffer, but when we do clean up properly this may
21894 baton
->size
= DW_BLOCK (attr
)->size
;
21895 baton
->data
= DW_BLOCK (attr
)->data
;
21899 dwarf2_invalid_attrib_class_complaint ("location description",
21900 SYMBOL_NATURAL_NAME (sym
));
21904 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21905 ? dwarf2_locexpr_block_index
21906 : dwarf2_locexpr_index
);
21907 SYMBOL_LOCATION_BATON (sym
) = baton
;
21911 /* Return the OBJFILE associated with the compilation unit CU. If CU
21912 came from a separate debuginfo file, then the master objfile is
21916 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21918 struct objfile
*objfile
= per_cu
->objfile
;
21920 /* Return the master objfile, so that we can report and look up the
21921 correct file containing this variable. */
21922 if (objfile
->separate_debug_objfile_backlink
)
21923 objfile
= objfile
->separate_debug_objfile_backlink
;
21928 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21929 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21930 CU_HEADERP first. */
21932 static const struct comp_unit_head
*
21933 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21934 struct dwarf2_per_cu_data
*per_cu
)
21936 const gdb_byte
*info_ptr
;
21939 return &per_cu
->cu
->header
;
21941 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21943 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21944 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21949 /* Return the address size given in the compilation unit header for CU. */
21952 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21954 struct comp_unit_head cu_header_local
;
21955 const struct comp_unit_head
*cu_headerp
;
21957 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21959 return cu_headerp
->addr_size
;
21962 /* Return the offset size given in the compilation unit header for CU. */
21965 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21967 struct comp_unit_head cu_header_local
;
21968 const struct comp_unit_head
*cu_headerp
;
21970 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21972 return cu_headerp
->offset_size
;
21975 /* See its dwarf2loc.h declaration. */
21978 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21980 struct comp_unit_head cu_header_local
;
21981 const struct comp_unit_head
*cu_headerp
;
21983 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21985 if (cu_headerp
->version
== 2)
21986 return cu_headerp
->addr_size
;
21988 return cu_headerp
->offset_size
;
21991 /* Return the text offset of the CU. The returned offset comes from
21992 this CU's objfile. If this objfile came from a separate debuginfo
21993 file, then the offset may be different from the corresponding
21994 offset in the parent objfile. */
21997 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21999 struct objfile
*objfile
= per_cu
->objfile
;
22001 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22004 /* Locate the .debug_info compilation unit from CU's objfile which contains
22005 the DIE at OFFSET. Raises an error on failure. */
22007 static struct dwarf2_per_cu_data
*
22008 dwarf2_find_containing_comp_unit (sect_offset offset
,
22009 unsigned int offset_in_dwz
,
22010 struct objfile
*objfile
)
22012 struct dwarf2_per_cu_data
*this_cu
;
22014 const sect_offset
*cu_off
;
22017 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22020 struct dwarf2_per_cu_data
*mid_cu
;
22021 int mid
= low
+ (high
- low
) / 2;
22023 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22024 cu_off
= &mid_cu
->offset
;
22025 if (mid_cu
->is_dwz
> offset_in_dwz
22026 || (mid_cu
->is_dwz
== offset_in_dwz
22027 && cu_off
->sect_off
>= offset
.sect_off
))
22032 gdb_assert (low
== high
);
22033 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22034 cu_off
= &this_cu
->offset
;
22035 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22037 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22038 error (_("Dwarf Error: could not find partial DIE containing "
22039 "offset 0x%lx [in module %s]"),
22040 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22042 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22043 <= offset
.sect_off
);
22044 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22048 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22049 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22050 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22051 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22052 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22057 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22060 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22062 memset (cu
, 0, sizeof (*cu
));
22064 cu
->per_cu
= per_cu
;
22065 cu
->objfile
= per_cu
->objfile
;
22066 obstack_init (&cu
->comp_unit_obstack
);
22069 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22072 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22073 enum language pretend_language
)
22075 struct attribute
*attr
;
22077 /* Set the language we're debugging. */
22078 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22080 set_cu_language (DW_UNSND (attr
), cu
);
22083 cu
->language
= pretend_language
;
22084 cu
->language_defn
= language_def (cu
->language
);
22087 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
22089 cu
->producer
= DW_STRING (attr
);
22092 /* Release one cached compilation unit, CU. We unlink it from the tree
22093 of compilation units, but we don't remove it from the read_in_chain;
22094 the caller is responsible for that.
22095 NOTE: DATA is a void * because this function is also used as a
22096 cleanup routine. */
22099 free_heap_comp_unit (void *data
)
22101 struct dwarf2_cu
*cu
= data
;
22103 gdb_assert (cu
->per_cu
!= NULL
);
22104 cu
->per_cu
->cu
= NULL
;
22107 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22112 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22113 when we're finished with it. We can't free the pointer itself, but be
22114 sure to unlink it from the cache. Also release any associated storage. */
22117 free_stack_comp_unit (void *data
)
22119 struct dwarf2_cu
*cu
= data
;
22121 gdb_assert (cu
->per_cu
!= NULL
);
22122 cu
->per_cu
->cu
= NULL
;
22125 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22126 cu
->partial_dies
= NULL
;
22129 /* Free all cached compilation units. */
22132 free_cached_comp_units (void *data
)
22134 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22136 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22137 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22138 while (per_cu
!= NULL
)
22140 struct dwarf2_per_cu_data
*next_cu
;
22142 next_cu
= per_cu
->cu
->read_in_chain
;
22144 free_heap_comp_unit (per_cu
->cu
);
22145 *last_chain
= next_cu
;
22151 /* Increase the age counter on each cached compilation unit, and free
22152 any that are too old. */
22155 age_cached_comp_units (void)
22157 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22159 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22160 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22161 while (per_cu
!= NULL
)
22163 per_cu
->cu
->last_used
++;
22164 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22165 dwarf2_mark (per_cu
->cu
);
22166 per_cu
= per_cu
->cu
->read_in_chain
;
22169 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22170 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22171 while (per_cu
!= NULL
)
22173 struct dwarf2_per_cu_data
*next_cu
;
22175 next_cu
= per_cu
->cu
->read_in_chain
;
22177 if (!per_cu
->cu
->mark
)
22179 free_heap_comp_unit (per_cu
->cu
);
22180 *last_chain
= next_cu
;
22183 last_chain
= &per_cu
->cu
->read_in_chain
;
22189 /* Remove a single compilation unit from the cache. */
22192 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22194 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22196 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22197 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22198 while (per_cu
!= NULL
)
22200 struct dwarf2_per_cu_data
*next_cu
;
22202 next_cu
= per_cu
->cu
->read_in_chain
;
22204 if (per_cu
== target_per_cu
)
22206 free_heap_comp_unit (per_cu
->cu
);
22208 *last_chain
= next_cu
;
22212 last_chain
= &per_cu
->cu
->read_in_chain
;
22218 /* Release all extra memory associated with OBJFILE. */
22221 dwarf2_free_objfile (struct objfile
*objfile
)
22223 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22225 if (dwarf2_per_objfile
== NULL
)
22228 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22229 free_cached_comp_units (NULL
);
22231 if (dwarf2_per_objfile
->quick_file_names_table
)
22232 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22234 if (dwarf2_per_objfile
->line_header_hash
)
22235 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22237 /* Everything else should be on the objfile obstack. */
22240 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22241 We store these in a hash table separate from the DIEs, and preserve them
22242 when the DIEs are flushed out of cache.
22244 The CU "per_cu" pointer is needed because offset alone is not enough to
22245 uniquely identify the type. A file may have multiple .debug_types sections,
22246 or the type may come from a DWO file. Furthermore, while it's more logical
22247 to use per_cu->section+offset, with Fission the section with the data is in
22248 the DWO file but we don't know that section at the point we need it.
22249 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22250 because we can enter the lookup routine, get_die_type_at_offset, from
22251 outside this file, and thus won't necessarily have PER_CU->cu.
22252 Fortunately, PER_CU is stable for the life of the objfile. */
22254 struct dwarf2_per_cu_offset_and_type
22256 const struct dwarf2_per_cu_data
*per_cu
;
22257 sect_offset offset
;
22261 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22264 per_cu_offset_and_type_hash (const void *item
)
22266 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22268 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22271 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22274 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22276 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22277 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22279 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22280 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22283 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22284 table if necessary. For convenience, return TYPE.
22286 The DIEs reading must have careful ordering to:
22287 * Not cause infite loops trying to read in DIEs as a prerequisite for
22288 reading current DIE.
22289 * Not trying to dereference contents of still incompletely read in types
22290 while reading in other DIEs.
22291 * Enable referencing still incompletely read in types just by a pointer to
22292 the type without accessing its fields.
22294 Therefore caller should follow these rules:
22295 * Try to fetch any prerequisite types we may need to build this DIE type
22296 before building the type and calling set_die_type.
22297 * After building type call set_die_type for current DIE as soon as
22298 possible before fetching more types to complete the current type.
22299 * Make the type as complete as possible before fetching more types. */
22301 static struct type
*
22302 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22304 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22305 struct objfile
*objfile
= cu
->objfile
;
22306 struct attribute
*attr
;
22307 struct dynamic_prop prop
;
22309 /* For Ada types, make sure that the gnat-specific data is always
22310 initialized (if not already set). There are a few types where
22311 we should not be doing so, because the type-specific area is
22312 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22313 where the type-specific area is used to store the floatformat).
22314 But this is not a problem, because the gnat-specific information
22315 is actually not needed for these types. */
22316 if (need_gnat_info (cu
)
22317 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22318 && TYPE_CODE (type
) != TYPE_CODE_FLT
22319 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22320 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22321 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22322 && !HAVE_GNAT_AUX_INFO (type
))
22323 INIT_GNAT_SPECIFIC (type
);
22325 /* Read DW_AT_data_location and set in type. */
22326 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22327 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22328 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22330 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22332 dwarf2_per_objfile
->die_type_hash
=
22333 htab_create_alloc_ex (127,
22334 per_cu_offset_and_type_hash
,
22335 per_cu_offset_and_type_eq
,
22337 &objfile
->objfile_obstack
,
22338 hashtab_obstack_allocate
,
22339 dummy_obstack_deallocate
);
22342 ofs
.per_cu
= cu
->per_cu
;
22343 ofs
.offset
= die
->offset
;
22345 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22346 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22348 complaint (&symfile_complaints
,
22349 _("A problem internal to GDB: DIE 0x%x has type already set"),
22350 die
->offset
.sect_off
);
22351 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22356 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22357 or return NULL if the die does not have a saved type. */
22359 static struct type
*
22360 get_die_type_at_offset (sect_offset offset
,
22361 struct dwarf2_per_cu_data
*per_cu
)
22363 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22365 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22368 ofs
.per_cu
= per_cu
;
22369 ofs
.offset
= offset
;
22370 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22377 /* Look up the type for DIE in CU in die_type_hash,
22378 or return NULL if DIE does not have a saved type. */
22380 static struct type
*
22381 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22383 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22386 /* Add a dependence relationship from CU to REF_PER_CU. */
22389 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22390 struct dwarf2_per_cu_data
*ref_per_cu
)
22394 if (cu
->dependencies
== NULL
)
22396 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22397 NULL
, &cu
->comp_unit_obstack
,
22398 hashtab_obstack_allocate
,
22399 dummy_obstack_deallocate
);
22401 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22403 *slot
= ref_per_cu
;
22406 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22407 Set the mark field in every compilation unit in the
22408 cache that we must keep because we are keeping CU. */
22411 dwarf2_mark_helper (void **slot
, void *data
)
22413 struct dwarf2_per_cu_data
*per_cu
;
22415 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22417 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22418 reading of the chain. As such dependencies remain valid it is not much
22419 useful to track and undo them during QUIT cleanups. */
22420 if (per_cu
->cu
== NULL
)
22423 if (per_cu
->cu
->mark
)
22425 per_cu
->cu
->mark
= 1;
22427 if (per_cu
->cu
->dependencies
!= NULL
)
22428 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22433 /* Set the mark field in CU and in every other compilation unit in the
22434 cache that we must keep because we are keeping CU. */
22437 dwarf2_mark (struct dwarf2_cu
*cu
)
22442 if (cu
->dependencies
!= NULL
)
22443 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22447 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22451 per_cu
->cu
->mark
= 0;
22452 per_cu
= per_cu
->cu
->read_in_chain
;
22456 /* Trivial hash function for partial_die_info: the hash value of a DIE
22457 is its offset in .debug_info for this objfile. */
22460 partial_die_hash (const void *item
)
22462 const struct partial_die_info
*part_die
= item
;
22464 return part_die
->offset
.sect_off
;
22467 /* Trivial comparison function for partial_die_info structures: two DIEs
22468 are equal if they have the same offset. */
22471 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22473 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22474 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22476 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22479 static struct cmd_list_element
*set_dwarf_cmdlist
;
22480 static struct cmd_list_element
*show_dwarf_cmdlist
;
22483 set_dwarf_cmd (char *args
, int from_tty
)
22485 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22490 show_dwarf_cmd (char *args
, int from_tty
)
22492 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22495 /* Free data associated with OBJFILE, if necessary. */
22498 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22500 struct dwarf2_per_objfile
*data
= d
;
22503 /* Make sure we don't accidentally use dwarf2_per_objfile while
22505 dwarf2_per_objfile
= NULL
;
22507 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22508 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22510 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22511 VEC_free (dwarf2_per_cu_ptr
,
22512 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22513 xfree (data
->all_type_units
);
22515 VEC_free (dwarf2_section_info_def
, data
->types
);
22517 if (data
->dwo_files
)
22518 free_dwo_files (data
->dwo_files
, objfile
);
22519 if (data
->dwp_file
)
22520 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22522 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22523 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22527 /* The "save gdb-index" command. */
22529 /* The contents of the hash table we create when building the string
22531 struct strtab_entry
22533 offset_type offset
;
22537 /* Hash function for a strtab_entry.
22539 Function is used only during write_hash_table so no index format backward
22540 compatibility is needed. */
22543 hash_strtab_entry (const void *e
)
22545 const struct strtab_entry
*entry
= e
;
22546 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22549 /* Equality function for a strtab_entry. */
22552 eq_strtab_entry (const void *a
, const void *b
)
22554 const struct strtab_entry
*ea
= a
;
22555 const struct strtab_entry
*eb
= b
;
22556 return !strcmp (ea
->str
, eb
->str
);
22559 /* Create a strtab_entry hash table. */
22562 create_strtab (void)
22564 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22565 xfree
, xcalloc
, xfree
);
22568 /* Add a string to the constant pool. Return the string's offset in
22572 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22575 struct strtab_entry entry
;
22576 struct strtab_entry
*result
;
22579 slot
= htab_find_slot (table
, &entry
, INSERT
);
22584 result
= XNEW (struct strtab_entry
);
22585 result
->offset
= obstack_object_size (cpool
);
22587 obstack_grow_str0 (cpool
, str
);
22590 return result
->offset
;
22593 /* An entry in the symbol table. */
22594 struct symtab_index_entry
22596 /* The name of the symbol. */
22598 /* The offset of the name in the constant pool. */
22599 offset_type index_offset
;
22600 /* A sorted vector of the indices of all the CUs that hold an object
22602 VEC (offset_type
) *cu_indices
;
22605 /* The symbol table. This is a power-of-2-sized hash table. */
22606 struct mapped_symtab
22608 offset_type n_elements
;
22610 struct symtab_index_entry
**data
;
22613 /* Hash function for a symtab_index_entry. */
22616 hash_symtab_entry (const void *e
)
22618 const struct symtab_index_entry
*entry
= e
;
22619 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22620 sizeof (offset_type
) * VEC_length (offset_type
,
22621 entry
->cu_indices
),
22625 /* Equality function for a symtab_index_entry. */
22628 eq_symtab_entry (const void *a
, const void *b
)
22630 const struct symtab_index_entry
*ea
= a
;
22631 const struct symtab_index_entry
*eb
= b
;
22632 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22633 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22635 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22636 VEC_address (offset_type
, eb
->cu_indices
),
22637 sizeof (offset_type
) * len
);
22640 /* Destroy a symtab_index_entry. */
22643 delete_symtab_entry (void *p
)
22645 struct symtab_index_entry
*entry
= p
;
22646 VEC_free (offset_type
, entry
->cu_indices
);
22650 /* Create a hash table holding symtab_index_entry objects. */
22653 create_symbol_hash_table (void)
22655 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22656 delete_symtab_entry
, xcalloc
, xfree
);
22659 /* Create a new mapped symtab object. */
22661 static struct mapped_symtab
*
22662 create_mapped_symtab (void)
22664 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22665 symtab
->n_elements
= 0;
22666 symtab
->size
= 1024;
22667 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22671 /* Destroy a mapped_symtab. */
22674 cleanup_mapped_symtab (void *p
)
22676 struct mapped_symtab
*symtab
= p
;
22677 /* The contents of the array are freed when the other hash table is
22679 xfree (symtab
->data
);
22683 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22686 Function is used only during write_hash_table so no index format backward
22687 compatibility is needed. */
22689 static struct symtab_index_entry
**
22690 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22692 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22694 index
= hash
& (symtab
->size
- 1);
22695 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22699 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22700 return &symtab
->data
[index
];
22701 index
= (index
+ step
) & (symtab
->size
- 1);
22705 /* Expand SYMTAB's hash table. */
22708 hash_expand (struct mapped_symtab
*symtab
)
22710 offset_type old_size
= symtab
->size
;
22712 struct symtab_index_entry
**old_entries
= symtab
->data
;
22715 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22717 for (i
= 0; i
< old_size
; ++i
)
22719 if (old_entries
[i
])
22721 struct symtab_index_entry
**slot
= find_slot (symtab
,
22722 old_entries
[i
]->name
);
22723 *slot
= old_entries
[i
];
22727 xfree (old_entries
);
22730 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22731 CU_INDEX is the index of the CU in which the symbol appears.
22732 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22735 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22736 int is_static
, gdb_index_symbol_kind kind
,
22737 offset_type cu_index
)
22739 struct symtab_index_entry
**slot
;
22740 offset_type cu_index_and_attrs
;
22742 ++symtab
->n_elements
;
22743 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22744 hash_expand (symtab
);
22746 slot
= find_slot (symtab
, name
);
22749 *slot
= XNEW (struct symtab_index_entry
);
22750 (*slot
)->name
= name
;
22751 /* index_offset is set later. */
22752 (*slot
)->cu_indices
= NULL
;
22755 cu_index_and_attrs
= 0;
22756 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22757 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22758 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22760 /* We don't want to record an index value twice as we want to avoid the
22762 We process all global symbols and then all static symbols
22763 (which would allow us to avoid the duplication by only having to check
22764 the last entry pushed), but a symbol could have multiple kinds in one CU.
22765 To keep things simple we don't worry about the duplication here and
22766 sort and uniqufy the list after we've processed all symbols. */
22767 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22770 /* qsort helper routine for uniquify_cu_indices. */
22773 offset_type_compare (const void *ap
, const void *bp
)
22775 offset_type a
= *(offset_type
*) ap
;
22776 offset_type b
= *(offset_type
*) bp
;
22778 return (a
> b
) - (b
> a
);
22781 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22784 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22788 for (i
= 0; i
< symtab
->size
; ++i
)
22790 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22793 && entry
->cu_indices
!= NULL
)
22795 unsigned int next_to_insert
, next_to_check
;
22796 offset_type last_value
;
22798 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22799 VEC_length (offset_type
, entry
->cu_indices
),
22800 sizeof (offset_type
), offset_type_compare
);
22802 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22803 next_to_insert
= 1;
22804 for (next_to_check
= 1;
22805 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22808 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22811 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22813 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22818 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22823 /* Add a vector of indices to the constant pool. */
22826 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22827 struct symtab_index_entry
*entry
)
22831 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22834 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22835 offset_type val
= MAYBE_SWAP (len
);
22840 entry
->index_offset
= obstack_object_size (cpool
);
22842 obstack_grow (cpool
, &val
, sizeof (val
));
22844 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22847 val
= MAYBE_SWAP (iter
);
22848 obstack_grow (cpool
, &val
, sizeof (val
));
22853 struct symtab_index_entry
*old_entry
= *slot
;
22854 entry
->index_offset
= old_entry
->index_offset
;
22857 return entry
->index_offset
;
22860 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22861 constant pool entries going into the obstack CPOOL. */
22864 write_hash_table (struct mapped_symtab
*symtab
,
22865 struct obstack
*output
, struct obstack
*cpool
)
22868 htab_t symbol_hash_table
;
22871 symbol_hash_table
= create_symbol_hash_table ();
22872 str_table
= create_strtab ();
22874 /* We add all the index vectors to the constant pool first, to
22875 ensure alignment is ok. */
22876 for (i
= 0; i
< symtab
->size
; ++i
)
22878 if (symtab
->data
[i
])
22879 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22882 /* Now write out the hash table. */
22883 for (i
= 0; i
< symtab
->size
; ++i
)
22885 offset_type str_off
, vec_off
;
22887 if (symtab
->data
[i
])
22889 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22890 vec_off
= symtab
->data
[i
]->index_offset
;
22894 /* While 0 is a valid constant pool index, it is not valid
22895 to have 0 for both offsets. */
22900 str_off
= MAYBE_SWAP (str_off
);
22901 vec_off
= MAYBE_SWAP (vec_off
);
22903 obstack_grow (output
, &str_off
, sizeof (str_off
));
22904 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22907 htab_delete (str_table
);
22908 htab_delete (symbol_hash_table
);
22911 /* Struct to map psymtab to CU index in the index file. */
22912 struct psymtab_cu_index_map
22914 struct partial_symtab
*psymtab
;
22915 unsigned int cu_index
;
22919 hash_psymtab_cu_index (const void *item
)
22921 const struct psymtab_cu_index_map
*map
= item
;
22923 return htab_hash_pointer (map
->psymtab
);
22927 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22929 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22930 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22932 return lhs
->psymtab
== rhs
->psymtab
;
22935 /* Helper struct for building the address table. */
22936 struct addrmap_index_data
22938 struct objfile
*objfile
;
22939 struct obstack
*addr_obstack
;
22940 htab_t cu_index_htab
;
22942 /* Non-zero if the previous_* fields are valid.
22943 We can't write an entry until we see the next entry (since it is only then
22944 that we know the end of the entry). */
22945 int previous_valid
;
22946 /* Index of the CU in the table of all CUs in the index file. */
22947 unsigned int previous_cu_index
;
22948 /* Start address of the CU. */
22949 CORE_ADDR previous_cu_start
;
22952 /* Write an address entry to OBSTACK. */
22955 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22956 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22958 offset_type cu_index_to_write
;
22960 CORE_ADDR baseaddr
;
22962 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22964 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22965 obstack_grow (obstack
, addr
, 8);
22966 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22967 obstack_grow (obstack
, addr
, 8);
22968 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22969 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22972 /* Worker function for traversing an addrmap to build the address table. */
22975 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22977 struct addrmap_index_data
*data
= datap
;
22978 struct partial_symtab
*pst
= obj
;
22980 if (data
->previous_valid
)
22981 add_address_entry (data
->objfile
, data
->addr_obstack
,
22982 data
->previous_cu_start
, start_addr
,
22983 data
->previous_cu_index
);
22985 data
->previous_cu_start
= start_addr
;
22988 struct psymtab_cu_index_map find_map
, *map
;
22989 find_map
.psymtab
= pst
;
22990 map
= htab_find (data
->cu_index_htab
, &find_map
);
22991 gdb_assert (map
!= NULL
);
22992 data
->previous_cu_index
= map
->cu_index
;
22993 data
->previous_valid
= 1;
22996 data
->previous_valid
= 0;
23001 /* Write OBJFILE's address map to OBSTACK.
23002 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23003 in the index file. */
23006 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23007 htab_t cu_index_htab
)
23009 struct addrmap_index_data addrmap_index_data
;
23011 /* When writing the address table, we have to cope with the fact that
23012 the addrmap iterator only provides the start of a region; we have to
23013 wait until the next invocation to get the start of the next region. */
23015 addrmap_index_data
.objfile
= objfile
;
23016 addrmap_index_data
.addr_obstack
= obstack
;
23017 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23018 addrmap_index_data
.previous_valid
= 0;
23020 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23021 &addrmap_index_data
);
23023 /* It's highly unlikely the last entry (end address = 0xff...ff)
23024 is valid, but we should still handle it.
23025 The end address is recorded as the start of the next region, but that
23026 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23028 if (addrmap_index_data
.previous_valid
)
23029 add_address_entry (objfile
, obstack
,
23030 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23031 addrmap_index_data
.previous_cu_index
);
23034 /* Return the symbol kind of PSYM. */
23036 static gdb_index_symbol_kind
23037 symbol_kind (struct partial_symbol
*psym
)
23039 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23040 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23048 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23050 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23052 case LOC_CONST_BYTES
:
23053 case LOC_OPTIMIZED_OUT
:
23055 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23057 /* Note: It's currently impossible to recognize psyms as enum values
23058 short of reading the type info. For now punt. */
23059 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23061 /* There are other LOC_FOO values that one might want to classify
23062 as variables, but dwarf2read.c doesn't currently use them. */
23063 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23065 case STRUCT_DOMAIN
:
23066 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23068 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23072 /* Add a list of partial symbols to SYMTAB. */
23075 write_psymbols (struct mapped_symtab
*symtab
,
23077 struct partial_symbol
**psymp
,
23079 offset_type cu_index
,
23082 for (; count
-- > 0; ++psymp
)
23084 struct partial_symbol
*psym
= *psymp
;
23087 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23088 error (_("Ada is not currently supported by the index"));
23090 /* Only add a given psymbol once. */
23091 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23094 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23097 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23098 is_static
, kind
, cu_index
);
23103 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23104 exception if there is an error. */
23107 write_obstack (FILE *file
, struct obstack
*obstack
)
23109 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23111 != obstack_object_size (obstack
))
23112 error (_("couldn't data write to file"));
23115 /* Unlink a file if the argument is not NULL. */
23118 unlink_if_set (void *p
)
23120 char **filename
= p
;
23122 unlink (*filename
);
23125 /* A helper struct used when iterating over debug_types. */
23126 struct signatured_type_index_data
23128 struct objfile
*objfile
;
23129 struct mapped_symtab
*symtab
;
23130 struct obstack
*types_list
;
23135 /* A helper function that writes a single signatured_type to an
23139 write_one_signatured_type (void **slot
, void *d
)
23141 struct signatured_type_index_data
*info
= d
;
23142 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23143 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23146 write_psymbols (info
->symtab
,
23148 info
->objfile
->global_psymbols
.list
23149 + psymtab
->globals_offset
,
23150 psymtab
->n_global_syms
, info
->cu_index
,
23152 write_psymbols (info
->symtab
,
23154 info
->objfile
->static_psymbols
.list
23155 + psymtab
->statics_offset
,
23156 psymtab
->n_static_syms
, info
->cu_index
,
23159 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23160 entry
->per_cu
.offset
.sect_off
);
23161 obstack_grow (info
->types_list
, val
, 8);
23162 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23163 entry
->type_offset_in_tu
.cu_off
);
23164 obstack_grow (info
->types_list
, val
, 8);
23165 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23166 obstack_grow (info
->types_list
, val
, 8);
23173 /* Recurse into all "included" dependencies and write their symbols as
23174 if they appeared in this psymtab. */
23177 recursively_write_psymbols (struct objfile
*objfile
,
23178 struct partial_symtab
*psymtab
,
23179 struct mapped_symtab
*symtab
,
23181 offset_type cu_index
)
23185 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23186 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23187 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23188 symtab
, psyms_seen
, cu_index
);
23190 write_psymbols (symtab
,
23192 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23193 psymtab
->n_global_syms
, cu_index
,
23195 write_psymbols (symtab
,
23197 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23198 psymtab
->n_static_syms
, cu_index
,
23202 /* Create an index file for OBJFILE in the directory DIR. */
23205 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23207 struct cleanup
*cleanup
;
23208 char *filename
, *cleanup_filename
;
23209 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23210 struct obstack cu_list
, types_cu_list
;
23213 struct mapped_symtab
*symtab
;
23214 offset_type val
, size_of_contents
, total_len
;
23217 htab_t cu_index_htab
;
23218 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23220 if (dwarf2_per_objfile
->using_index
)
23221 error (_("Cannot use an index to create the index"));
23223 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23224 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23226 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23229 if (stat (objfile_name (objfile
), &st
) < 0)
23230 perror_with_name (objfile_name (objfile
));
23232 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23233 INDEX_SUFFIX
, (char *) NULL
);
23234 cleanup
= make_cleanup (xfree
, filename
);
23236 out_file
= gdb_fopen_cloexec (filename
, "wb");
23238 error (_("Can't open `%s' for writing"), filename
);
23240 cleanup_filename
= filename
;
23241 make_cleanup (unlink_if_set
, &cleanup_filename
);
23243 symtab
= create_mapped_symtab ();
23244 make_cleanup (cleanup_mapped_symtab
, symtab
);
23246 obstack_init (&addr_obstack
);
23247 make_cleanup_obstack_free (&addr_obstack
);
23249 obstack_init (&cu_list
);
23250 make_cleanup_obstack_free (&cu_list
);
23252 obstack_init (&types_cu_list
);
23253 make_cleanup_obstack_free (&types_cu_list
);
23255 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23256 NULL
, xcalloc
, xfree
);
23257 make_cleanup_htab_delete (psyms_seen
);
23259 /* While we're scanning CU's create a table that maps a psymtab pointer
23260 (which is what addrmap records) to its index (which is what is recorded
23261 in the index file). This will later be needed to write the address
23263 cu_index_htab
= htab_create_alloc (100,
23264 hash_psymtab_cu_index
,
23265 eq_psymtab_cu_index
,
23266 NULL
, xcalloc
, xfree
);
23267 make_cleanup_htab_delete (cu_index_htab
);
23268 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
23269 xmalloc (sizeof (struct psymtab_cu_index_map
)
23270 * dwarf2_per_objfile
->n_comp_units
);
23271 make_cleanup (xfree
, psymtab_cu_index_map
);
23273 /* The CU list is already sorted, so we don't need to do additional
23274 work here. Also, the debug_types entries do not appear in
23275 all_comp_units, but only in their own hash table. */
23276 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23278 struct dwarf2_per_cu_data
*per_cu
23279 = dwarf2_per_objfile
->all_comp_units
[i
];
23280 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23282 struct psymtab_cu_index_map
*map
;
23285 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23286 It may be referenced from a local scope but in such case it does not
23287 need to be present in .gdb_index. */
23288 if (psymtab
== NULL
)
23291 if (psymtab
->user
== NULL
)
23292 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23294 map
= &psymtab_cu_index_map
[i
];
23295 map
->psymtab
= psymtab
;
23297 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23298 gdb_assert (slot
!= NULL
);
23299 gdb_assert (*slot
== NULL
);
23302 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23303 per_cu
->offset
.sect_off
);
23304 obstack_grow (&cu_list
, val
, 8);
23305 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23306 obstack_grow (&cu_list
, val
, 8);
23309 /* Dump the address map. */
23310 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23312 /* Write out the .debug_type entries, if any. */
23313 if (dwarf2_per_objfile
->signatured_types
)
23315 struct signatured_type_index_data sig_data
;
23317 sig_data
.objfile
= objfile
;
23318 sig_data
.symtab
= symtab
;
23319 sig_data
.types_list
= &types_cu_list
;
23320 sig_data
.psyms_seen
= psyms_seen
;
23321 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23322 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23323 write_one_signatured_type
, &sig_data
);
23326 /* Now that we've processed all symbols we can shrink their cu_indices
23328 uniquify_cu_indices (symtab
);
23330 obstack_init (&constant_pool
);
23331 make_cleanup_obstack_free (&constant_pool
);
23332 obstack_init (&symtab_obstack
);
23333 make_cleanup_obstack_free (&symtab_obstack
);
23334 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23336 obstack_init (&contents
);
23337 make_cleanup_obstack_free (&contents
);
23338 size_of_contents
= 6 * sizeof (offset_type
);
23339 total_len
= size_of_contents
;
23341 /* The version number. */
23342 val
= MAYBE_SWAP (8);
23343 obstack_grow (&contents
, &val
, sizeof (val
));
23345 /* The offset of the CU list from the start of the file. */
23346 val
= MAYBE_SWAP (total_len
);
23347 obstack_grow (&contents
, &val
, sizeof (val
));
23348 total_len
+= obstack_object_size (&cu_list
);
23350 /* The offset of the types CU list from the start of the file. */
23351 val
= MAYBE_SWAP (total_len
);
23352 obstack_grow (&contents
, &val
, sizeof (val
));
23353 total_len
+= obstack_object_size (&types_cu_list
);
23355 /* The offset of the address table from the start of the file. */
23356 val
= MAYBE_SWAP (total_len
);
23357 obstack_grow (&contents
, &val
, sizeof (val
));
23358 total_len
+= obstack_object_size (&addr_obstack
);
23360 /* The offset of the symbol table from the start of the file. */
23361 val
= MAYBE_SWAP (total_len
);
23362 obstack_grow (&contents
, &val
, sizeof (val
));
23363 total_len
+= obstack_object_size (&symtab_obstack
);
23365 /* The offset of the constant pool from the start of the file. */
23366 val
= MAYBE_SWAP (total_len
);
23367 obstack_grow (&contents
, &val
, sizeof (val
));
23368 total_len
+= obstack_object_size (&constant_pool
);
23370 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23372 write_obstack (out_file
, &contents
);
23373 write_obstack (out_file
, &cu_list
);
23374 write_obstack (out_file
, &types_cu_list
);
23375 write_obstack (out_file
, &addr_obstack
);
23376 write_obstack (out_file
, &symtab_obstack
);
23377 write_obstack (out_file
, &constant_pool
);
23381 /* We want to keep the file, so we set cleanup_filename to NULL
23382 here. See unlink_if_set. */
23383 cleanup_filename
= NULL
;
23385 do_cleanups (cleanup
);
23388 /* Implementation of the `save gdb-index' command.
23390 Note that the file format used by this command is documented in the
23391 GDB manual. Any changes here must be documented there. */
23394 save_gdb_index_command (char *arg
, int from_tty
)
23396 struct objfile
*objfile
;
23399 error (_("usage: save gdb-index DIRECTORY"));
23401 ALL_OBJFILES (objfile
)
23405 /* If the objfile does not correspond to an actual file, skip it. */
23406 if (stat (objfile_name (objfile
), &st
) < 0)
23409 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23410 if (dwarf2_per_objfile
)
23415 write_psymtabs_to_index (objfile
, arg
);
23417 CATCH (except
, RETURN_MASK_ERROR
)
23419 exception_fprintf (gdb_stderr
, except
,
23420 _("Error while writing index for `%s': "),
23421 objfile_name (objfile
));
23430 int dwarf_always_disassemble
;
23433 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23434 struct cmd_list_element
*c
, const char *value
)
23436 fprintf_filtered (file
,
23437 _("Whether to always disassemble "
23438 "DWARF expressions is %s.\n"),
23443 show_check_physname (struct ui_file
*file
, int from_tty
,
23444 struct cmd_list_element
*c
, const char *value
)
23446 fprintf_filtered (file
,
23447 _("Whether to check \"physname\" is %s.\n"),
23451 void _initialize_dwarf2_read (void);
23454 _initialize_dwarf2_read (void)
23456 struct cmd_list_element
*c
;
23458 dwarf2_objfile_data_key
23459 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23461 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23462 Set DWARF specific variables.\n\
23463 Configure DWARF variables such as the cache size"),
23464 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23465 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23467 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23468 Show DWARF specific variables\n\
23469 Show DWARF variables such as the cache size"),
23470 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23471 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23473 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23474 &dwarf_max_cache_age
, _("\
23475 Set the upper bound on the age of cached DWARF compilation units."), _("\
23476 Show the upper bound on the age of cached DWARF compilation units."), _("\
23477 A higher limit means that cached compilation units will be stored\n\
23478 in memory longer, and more total memory will be used. Zero disables\n\
23479 caching, which can slow down startup."),
23481 show_dwarf_max_cache_age
,
23482 &set_dwarf_cmdlist
,
23483 &show_dwarf_cmdlist
);
23485 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23486 &dwarf_always_disassemble
, _("\
23487 Set whether `info address' always disassembles DWARF expressions."), _("\
23488 Show whether `info address' always disassembles DWARF expressions."), _("\
23489 When enabled, DWARF expressions are always printed in an assembly-like\n\
23490 syntax. When disabled, expressions will be printed in a more\n\
23491 conversational style, when possible."),
23493 show_dwarf_always_disassemble
,
23494 &set_dwarf_cmdlist
,
23495 &show_dwarf_cmdlist
);
23497 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23498 Set debugging of the DWARF reader."), _("\
23499 Show debugging of the DWARF reader."), _("\
23500 When enabled (non-zero), debugging messages are printed during DWARF\n\
23501 reading and symtab expansion. A value of 1 (one) provides basic\n\
23502 information. A value greater than 1 provides more verbose information."),
23505 &setdebuglist
, &showdebuglist
);
23507 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23508 Set debugging of the DWARF DIE reader."), _("\
23509 Show debugging of the DWARF DIE reader."), _("\
23510 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23511 The value is the maximum depth to print."),
23514 &setdebuglist
, &showdebuglist
);
23516 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23517 Set debugging of the dwarf line reader."), _("\
23518 Show debugging of the dwarf line reader."), _("\
23519 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23520 A value of 1 (one) provides basic information.\n\
23521 A value greater than 1 provides more verbose information."),
23524 &setdebuglist
, &showdebuglist
);
23526 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23527 Set cross-checking of \"physname\" code against demangler."), _("\
23528 Show cross-checking of \"physname\" code against demangler."), _("\
23529 When enabled, GDB's internal \"physname\" code is checked against\n\
23531 NULL
, show_check_physname
,
23532 &setdebuglist
, &showdebuglist
);
23534 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23535 no_class
, &use_deprecated_index_sections
, _("\
23536 Set whether to use deprecated gdb_index sections."), _("\
23537 Show whether to use deprecated gdb_index sections."), _("\
23538 When enabled, deprecated .gdb_index sections are used anyway.\n\
23539 Normally they are ignored either because of a missing feature or\n\
23540 performance issue.\n\
23541 Warning: This option must be enabled before gdb reads the file."),
23544 &setlist
, &showlist
);
23546 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23548 Save a gdb-index file.\n\
23549 Usage: save gdb-index DIRECTORY"),
23551 set_cmd_completer (c
, filename_completer
);
23553 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23554 &dwarf2_locexpr_funcs
);
23555 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23556 &dwarf2_loclist_funcs
);
23558 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23559 &dwarf2_block_frame_base_locexpr_funcs
);
23560 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23561 &dwarf2_block_frame_base_loclist_funcs
);