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 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 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, 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
,
6986 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6987 cu
->language
, objfile
);
6990 case DW_TAG_typedef
:
6991 case DW_TAG_base_type
:
6992 case DW_TAG_subrange_type
:
6993 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6994 built_actual_name
!= NULL
,
6995 VAR_DOMAIN
, LOC_TYPEDEF
,
6996 &objfile
->static_psymbols
,
6997 0, cu
->language
, objfile
);
6999 case DW_TAG_imported_declaration
:
7000 case DW_TAG_namespace
:
7001 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7002 built_actual_name
!= NULL
,
7003 VAR_DOMAIN
, LOC_TYPEDEF
,
7004 &objfile
->global_psymbols
,
7005 0, cu
->language
, objfile
);
7008 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7009 built_actual_name
!= NULL
,
7010 MODULE_DOMAIN
, LOC_TYPEDEF
,
7011 &objfile
->global_psymbols
,
7012 0, cu
->language
, objfile
);
7014 case DW_TAG_class_type
:
7015 case DW_TAG_interface_type
:
7016 case DW_TAG_structure_type
:
7017 case DW_TAG_union_type
:
7018 case DW_TAG_enumeration_type
:
7019 /* Skip external references. The DWARF standard says in the section
7020 about "Structure, Union, and Class Type Entries": "An incomplete
7021 structure, union or class type is represented by a structure,
7022 union or class entry that does not have a byte size attribute
7023 and that has a DW_AT_declaration attribute." */
7024 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7026 xfree (built_actual_name
);
7030 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7031 static vs. global. */
7032 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7033 built_actual_name
!= NULL
,
7034 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7035 (cu
->language
== language_cplus
7036 || cu
->language
== language_java
)
7037 ? &objfile
->global_psymbols
7038 : &objfile
->static_psymbols
,
7039 0, cu
->language
, objfile
);
7042 case DW_TAG_enumerator
:
7043 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7044 built_actual_name
!= NULL
,
7045 VAR_DOMAIN
, LOC_CONST
,
7046 (cu
->language
== language_cplus
7047 || cu
->language
== language_java
)
7048 ? &objfile
->global_psymbols
7049 : &objfile
->static_psymbols
,
7050 0, cu
->language
, objfile
);
7056 xfree (built_actual_name
);
7059 /* Read a partial die corresponding to a namespace; also, add a symbol
7060 corresponding to that namespace to the symbol table. NAMESPACE is
7061 the name of the enclosing namespace. */
7064 add_partial_namespace (struct partial_die_info
*pdi
,
7065 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7066 int set_addrmap
, struct dwarf2_cu
*cu
)
7068 /* Add a symbol for the namespace. */
7070 add_partial_symbol (pdi
, cu
);
7072 /* Now scan partial symbols in that namespace. */
7074 if (pdi
->has_children
)
7075 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7078 /* Read a partial die corresponding to a Fortran module. */
7081 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7082 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7084 /* Add a symbol for the namespace. */
7086 add_partial_symbol (pdi
, cu
);
7088 /* Now scan partial symbols in that module. */
7090 if (pdi
->has_children
)
7091 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7094 /* Read a partial die corresponding to a subprogram and create a partial
7095 symbol for that subprogram. When the CU language allows it, this
7096 routine also defines a partial symbol for each nested subprogram
7097 that this subprogram contains. If SET_ADDRMAP is true, record the
7098 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7099 and highest PC values found in PDI.
7101 PDI may also be a lexical block, in which case we simply search
7102 recursively for subprograms defined inside that lexical block.
7103 Again, this is only performed when the CU language allows this
7104 type of definitions. */
7107 add_partial_subprogram (struct partial_die_info
*pdi
,
7108 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7109 int set_addrmap
, struct dwarf2_cu
*cu
)
7111 if (pdi
->tag
== DW_TAG_subprogram
)
7113 if (pdi
->has_pc_info
)
7115 if (pdi
->lowpc
< *lowpc
)
7116 *lowpc
= pdi
->lowpc
;
7117 if (pdi
->highpc
> *highpc
)
7118 *highpc
= pdi
->highpc
;
7121 struct objfile
*objfile
= cu
->objfile
;
7122 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7127 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7128 SECT_OFF_TEXT (objfile
));
7129 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7130 pdi
->lowpc
+ baseaddr
);
7131 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7132 pdi
->highpc
+ baseaddr
);
7133 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7134 cu
->per_cu
->v
.psymtab
);
7138 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7140 if (!pdi
->is_declaration
)
7141 /* Ignore subprogram DIEs that do not have a name, they are
7142 illegal. Do not emit a complaint at this point, we will
7143 do so when we convert this psymtab into a symtab. */
7145 add_partial_symbol (pdi
, cu
);
7149 if (! pdi
->has_children
)
7152 if (cu
->language
== language_ada
)
7154 pdi
= pdi
->die_child
;
7157 fixup_partial_die (pdi
, cu
);
7158 if (pdi
->tag
== DW_TAG_subprogram
7159 || pdi
->tag
== DW_TAG_lexical_block
)
7160 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7161 pdi
= pdi
->die_sibling
;
7166 /* Read a partial die corresponding to an enumeration type. */
7169 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7170 struct dwarf2_cu
*cu
)
7172 struct partial_die_info
*pdi
;
7174 if (enum_pdi
->name
!= NULL
)
7175 add_partial_symbol (enum_pdi
, cu
);
7177 pdi
= enum_pdi
->die_child
;
7180 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7181 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7183 add_partial_symbol (pdi
, cu
);
7184 pdi
= pdi
->die_sibling
;
7188 /* Return the initial uleb128 in the die at INFO_PTR. */
7191 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7193 unsigned int bytes_read
;
7195 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7198 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7199 Return the corresponding abbrev, or NULL if the number is zero (indicating
7200 an empty DIE). In either case *BYTES_READ will be set to the length of
7201 the initial number. */
7203 static struct abbrev_info
*
7204 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7205 struct dwarf2_cu
*cu
)
7207 bfd
*abfd
= cu
->objfile
->obfd
;
7208 unsigned int abbrev_number
;
7209 struct abbrev_info
*abbrev
;
7211 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7213 if (abbrev_number
== 0)
7216 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7219 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7220 " at offset 0x%x [in module %s]"),
7221 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7222 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7228 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7229 Returns a pointer to the end of a series of DIEs, terminated by an empty
7230 DIE. Any children of the skipped DIEs will also be skipped. */
7232 static const gdb_byte
*
7233 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7235 struct dwarf2_cu
*cu
= reader
->cu
;
7236 struct abbrev_info
*abbrev
;
7237 unsigned int bytes_read
;
7241 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7243 return info_ptr
+ bytes_read
;
7245 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7249 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7250 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7251 abbrev corresponding to that skipped uleb128 should be passed in
7252 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7255 static const gdb_byte
*
7256 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7257 struct abbrev_info
*abbrev
)
7259 unsigned int bytes_read
;
7260 struct attribute attr
;
7261 bfd
*abfd
= reader
->abfd
;
7262 struct dwarf2_cu
*cu
= reader
->cu
;
7263 const gdb_byte
*buffer
= reader
->buffer
;
7264 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7265 const gdb_byte
*start_info_ptr
= info_ptr
;
7266 unsigned int form
, i
;
7268 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7270 /* The only abbrev we care about is DW_AT_sibling. */
7271 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7273 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7274 if (attr
.form
== DW_FORM_ref_addr
)
7275 complaint (&symfile_complaints
,
7276 _("ignoring absolute DW_AT_sibling"));
7279 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7280 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7282 if (sibling_ptr
< info_ptr
)
7283 complaint (&symfile_complaints
,
7284 _("DW_AT_sibling points backwards"));
7285 else if (sibling_ptr
> reader
->buffer_end
)
7286 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7292 /* If it isn't DW_AT_sibling, skip this attribute. */
7293 form
= abbrev
->attrs
[i
].form
;
7297 case DW_FORM_ref_addr
:
7298 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7299 and later it is offset sized. */
7300 if (cu
->header
.version
== 2)
7301 info_ptr
+= cu
->header
.addr_size
;
7303 info_ptr
+= cu
->header
.offset_size
;
7305 case DW_FORM_GNU_ref_alt
:
7306 info_ptr
+= cu
->header
.offset_size
;
7309 info_ptr
+= cu
->header
.addr_size
;
7316 case DW_FORM_flag_present
:
7328 case DW_FORM_ref_sig8
:
7331 case DW_FORM_string
:
7332 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7333 info_ptr
+= bytes_read
;
7335 case DW_FORM_sec_offset
:
7337 case DW_FORM_GNU_strp_alt
:
7338 info_ptr
+= cu
->header
.offset_size
;
7340 case DW_FORM_exprloc
:
7342 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7343 info_ptr
+= bytes_read
;
7345 case DW_FORM_block1
:
7346 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7348 case DW_FORM_block2
:
7349 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7351 case DW_FORM_block4
:
7352 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7356 case DW_FORM_ref_udata
:
7357 case DW_FORM_GNU_addr_index
:
7358 case DW_FORM_GNU_str_index
:
7359 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7361 case DW_FORM_indirect
:
7362 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7363 info_ptr
+= bytes_read
;
7364 /* We need to continue parsing from here, so just go back to
7366 goto skip_attribute
;
7369 error (_("Dwarf Error: Cannot handle %s "
7370 "in DWARF reader [in module %s]"),
7371 dwarf_form_name (form
),
7372 bfd_get_filename (abfd
));
7376 if (abbrev
->has_children
)
7377 return skip_children (reader
, info_ptr
);
7382 /* Locate ORIG_PDI's sibling.
7383 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7385 static const gdb_byte
*
7386 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7387 struct partial_die_info
*orig_pdi
,
7388 const gdb_byte
*info_ptr
)
7390 /* Do we know the sibling already? */
7392 if (orig_pdi
->sibling
)
7393 return orig_pdi
->sibling
;
7395 /* Are there any children to deal with? */
7397 if (!orig_pdi
->has_children
)
7400 /* Skip the children the long way. */
7402 return skip_children (reader
, info_ptr
);
7405 /* Expand this partial symbol table into a full symbol table. SELF is
7409 dwarf2_read_symtab (struct partial_symtab
*self
,
7410 struct objfile
*objfile
)
7414 warning (_("bug: psymtab for %s is already read in."),
7421 printf_filtered (_("Reading in symbols for %s..."),
7423 gdb_flush (gdb_stdout
);
7426 /* Restore our global data. */
7427 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7429 /* If this psymtab is constructed from a debug-only objfile, the
7430 has_section_at_zero flag will not necessarily be correct. We
7431 can get the correct value for this flag by looking at the data
7432 associated with the (presumably stripped) associated objfile. */
7433 if (objfile
->separate_debug_objfile_backlink
)
7435 struct dwarf2_per_objfile
*dpo_backlink
7436 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7437 dwarf2_objfile_data_key
);
7439 dwarf2_per_objfile
->has_section_at_zero
7440 = dpo_backlink
->has_section_at_zero
;
7443 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7445 psymtab_to_symtab_1 (self
);
7447 /* Finish up the debug error message. */
7449 printf_filtered (_("done.\n"));
7452 process_cu_includes ();
7455 /* Reading in full CUs. */
7457 /* Add PER_CU to the queue. */
7460 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7461 enum language pretend_language
)
7463 struct dwarf2_queue_item
*item
;
7466 item
= xmalloc (sizeof (*item
));
7467 item
->per_cu
= per_cu
;
7468 item
->pretend_language
= pretend_language
;
7471 if (dwarf2_queue
== NULL
)
7472 dwarf2_queue
= item
;
7474 dwarf2_queue_tail
->next
= item
;
7476 dwarf2_queue_tail
= item
;
7479 /* If PER_CU is not yet queued, add it to the queue.
7480 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7482 The result is non-zero if PER_CU was queued, otherwise the result is zero
7483 meaning either PER_CU is already queued or it is already loaded.
7485 N.B. There is an invariant here that if a CU is queued then it is loaded.
7486 The caller is required to load PER_CU if we return non-zero. */
7489 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7490 struct dwarf2_per_cu_data
*per_cu
,
7491 enum language pretend_language
)
7493 /* We may arrive here during partial symbol reading, if we need full
7494 DIEs to process an unusual case (e.g. template arguments). Do
7495 not queue PER_CU, just tell our caller to load its DIEs. */
7496 if (dwarf2_per_objfile
->reading_partial_symbols
)
7498 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7503 /* Mark the dependence relation so that we don't flush PER_CU
7505 if (dependent_cu
!= NULL
)
7506 dwarf2_add_dependence (dependent_cu
, per_cu
);
7508 /* If it's already on the queue, we have nothing to do. */
7512 /* If the compilation unit is already loaded, just mark it as
7514 if (per_cu
->cu
!= NULL
)
7516 per_cu
->cu
->last_used
= 0;
7520 /* Add it to the queue. */
7521 queue_comp_unit (per_cu
, pretend_language
);
7526 /* Process the queue. */
7529 process_queue (void)
7531 struct dwarf2_queue_item
*item
, *next_item
;
7533 if (dwarf_read_debug
)
7535 fprintf_unfiltered (gdb_stdlog
,
7536 "Expanding one or more symtabs of objfile %s ...\n",
7537 objfile_name (dwarf2_per_objfile
->objfile
));
7540 /* The queue starts out with one item, but following a DIE reference
7541 may load a new CU, adding it to the end of the queue. */
7542 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7544 if ((dwarf2_per_objfile
->using_index
7545 ? !item
->per_cu
->v
.quick
->compunit_symtab
7546 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7547 /* Skip dummy CUs. */
7548 && item
->per_cu
->cu
!= NULL
)
7550 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7551 unsigned int debug_print_threshold
;
7554 if (per_cu
->is_debug_types
)
7556 struct signatured_type
*sig_type
=
7557 (struct signatured_type
*) per_cu
;
7559 sprintf (buf
, "TU %s at offset 0x%x",
7560 hex_string (sig_type
->signature
),
7561 per_cu
->offset
.sect_off
);
7562 /* There can be 100s of TUs.
7563 Only print them in verbose mode. */
7564 debug_print_threshold
= 2;
7568 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7569 debug_print_threshold
= 1;
7572 if (dwarf_read_debug
>= debug_print_threshold
)
7573 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7575 if (per_cu
->is_debug_types
)
7576 process_full_type_unit (per_cu
, item
->pretend_language
);
7578 process_full_comp_unit (per_cu
, item
->pretend_language
);
7580 if (dwarf_read_debug
>= debug_print_threshold
)
7581 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7584 item
->per_cu
->queued
= 0;
7585 next_item
= item
->next
;
7589 dwarf2_queue_tail
= NULL
;
7591 if (dwarf_read_debug
)
7593 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7594 objfile_name (dwarf2_per_objfile
->objfile
));
7598 /* Free all allocated queue entries. This function only releases anything if
7599 an error was thrown; if the queue was processed then it would have been
7600 freed as we went along. */
7603 dwarf2_release_queue (void *dummy
)
7605 struct dwarf2_queue_item
*item
, *last
;
7607 item
= dwarf2_queue
;
7610 /* Anything still marked queued is likely to be in an
7611 inconsistent state, so discard it. */
7612 if (item
->per_cu
->queued
)
7614 if (item
->per_cu
->cu
!= NULL
)
7615 free_one_cached_comp_unit (item
->per_cu
);
7616 item
->per_cu
->queued
= 0;
7624 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7627 /* Read in full symbols for PST, and anything it depends on. */
7630 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7632 struct dwarf2_per_cu_data
*per_cu
;
7638 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7639 if (!pst
->dependencies
[i
]->readin
7640 && pst
->dependencies
[i
]->user
== NULL
)
7642 /* Inform about additional files that need to be read in. */
7645 /* FIXME: i18n: Need to make this a single string. */
7646 fputs_filtered (" ", gdb_stdout
);
7648 fputs_filtered ("and ", gdb_stdout
);
7650 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7651 wrap_here (""); /* Flush output. */
7652 gdb_flush (gdb_stdout
);
7654 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7657 per_cu
= pst
->read_symtab_private
;
7661 /* It's an include file, no symbols to read for it.
7662 Everything is in the parent symtab. */
7667 dw2_do_instantiate_symtab (per_cu
);
7670 /* Trivial hash function for die_info: the hash value of a DIE
7671 is its offset in .debug_info for this objfile. */
7674 die_hash (const void *item
)
7676 const struct die_info
*die
= item
;
7678 return die
->offset
.sect_off
;
7681 /* Trivial comparison function for die_info structures: two DIEs
7682 are equal if they have the same offset. */
7685 die_eq (const void *item_lhs
, const void *item_rhs
)
7687 const struct die_info
*die_lhs
= item_lhs
;
7688 const struct die_info
*die_rhs
= item_rhs
;
7690 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7693 /* die_reader_func for load_full_comp_unit.
7694 This is identical to read_signatured_type_reader,
7695 but is kept separate for now. */
7698 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7699 const gdb_byte
*info_ptr
,
7700 struct die_info
*comp_unit_die
,
7704 struct dwarf2_cu
*cu
= reader
->cu
;
7705 enum language
*language_ptr
= data
;
7707 gdb_assert (cu
->die_hash
== NULL
);
7709 htab_create_alloc_ex (cu
->header
.length
/ 12,
7713 &cu
->comp_unit_obstack
,
7714 hashtab_obstack_allocate
,
7715 dummy_obstack_deallocate
);
7718 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7719 &info_ptr
, comp_unit_die
);
7720 cu
->dies
= comp_unit_die
;
7721 /* comp_unit_die is not stored in die_hash, no need. */
7723 /* We try not to read any attributes in this function, because not
7724 all CUs needed for references have been loaded yet, and symbol
7725 table processing isn't initialized. But we have to set the CU language,
7726 or we won't be able to build types correctly.
7727 Similarly, if we do not read the producer, we can not apply
7728 producer-specific interpretation. */
7729 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7732 /* Load the DIEs associated with PER_CU into memory. */
7735 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7736 enum language pretend_language
)
7738 gdb_assert (! this_cu
->is_debug_types
);
7740 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7741 load_full_comp_unit_reader
, &pretend_language
);
7744 /* Add a DIE to the delayed physname list. */
7747 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7748 const char *name
, struct die_info
*die
,
7749 struct dwarf2_cu
*cu
)
7751 struct delayed_method_info mi
;
7753 mi
.fnfield_index
= fnfield_index
;
7757 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7760 /* A cleanup for freeing the delayed method list. */
7763 free_delayed_list (void *ptr
)
7765 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7766 if (cu
->method_list
!= NULL
)
7768 VEC_free (delayed_method_info
, cu
->method_list
);
7769 cu
->method_list
= NULL
;
7773 /* Compute the physnames of any methods on the CU's method list.
7775 The computation of method physnames is delayed in order to avoid the
7776 (bad) condition that one of the method's formal parameters is of an as yet
7780 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7783 struct delayed_method_info
*mi
;
7784 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7786 const char *physname
;
7787 struct fn_fieldlist
*fn_flp
7788 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7789 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7790 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7791 = physname
? physname
: "";
7795 /* Go objects should be embedded in a DW_TAG_module DIE,
7796 and it's not clear if/how imported objects will appear.
7797 To keep Go support simple until that's worked out,
7798 go back through what we've read and create something usable.
7799 We could do this while processing each DIE, and feels kinda cleaner,
7800 but that way is more invasive.
7801 This is to, for example, allow the user to type "p var" or "b main"
7802 without having to specify the package name, and allow lookups
7803 of module.object to work in contexts that use the expression
7807 fixup_go_packaging (struct dwarf2_cu
*cu
)
7809 char *package_name
= NULL
;
7810 struct pending
*list
;
7813 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7815 for (i
= 0; i
< list
->nsyms
; ++i
)
7817 struct symbol
*sym
= list
->symbol
[i
];
7819 if (SYMBOL_LANGUAGE (sym
) == language_go
7820 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7822 char *this_package_name
= go_symbol_package_name (sym
);
7824 if (this_package_name
== NULL
)
7826 if (package_name
== NULL
)
7827 package_name
= this_package_name
;
7830 if (strcmp (package_name
, this_package_name
) != 0)
7831 complaint (&symfile_complaints
,
7832 _("Symtab %s has objects from two different Go packages: %s and %s"),
7833 (symbol_symtab (sym
) != NULL
7834 ? symtab_to_filename_for_display
7835 (symbol_symtab (sym
))
7836 : objfile_name (cu
->objfile
)),
7837 this_package_name
, package_name
);
7838 xfree (this_package_name
);
7844 if (package_name
!= NULL
)
7846 struct objfile
*objfile
= cu
->objfile
;
7847 const char *saved_package_name
7848 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7850 strlen (package_name
));
7851 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7852 saved_package_name
, objfile
);
7855 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7857 sym
= allocate_symbol (objfile
);
7858 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7859 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7860 strlen (saved_package_name
), 0, objfile
);
7861 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7862 e.g., "main" finds the "main" module and not C's main(). */
7863 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7864 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7865 SYMBOL_TYPE (sym
) = type
;
7867 add_symbol_to_list (sym
, &global_symbols
);
7869 xfree (package_name
);
7873 /* Return the symtab for PER_CU. This works properly regardless of
7874 whether we're using the index or psymtabs. */
7876 static struct compunit_symtab
*
7877 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7879 return (dwarf2_per_objfile
->using_index
7880 ? per_cu
->v
.quick
->compunit_symtab
7881 : per_cu
->v
.psymtab
->compunit_symtab
);
7884 /* A helper function for computing the list of all symbol tables
7885 included by PER_CU. */
7888 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7889 htab_t all_children
, htab_t all_type_symtabs
,
7890 struct dwarf2_per_cu_data
*per_cu
,
7891 struct compunit_symtab
*immediate_parent
)
7895 struct compunit_symtab
*cust
;
7896 struct dwarf2_per_cu_data
*iter
;
7898 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7901 /* This inclusion and its children have been processed. */
7906 /* Only add a CU if it has a symbol table. */
7907 cust
= get_compunit_symtab (per_cu
);
7910 /* If this is a type unit only add its symbol table if we haven't
7911 seen it yet (type unit per_cu's can share symtabs). */
7912 if (per_cu
->is_debug_types
)
7914 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7918 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7919 if (cust
->user
== NULL
)
7920 cust
->user
= immediate_parent
;
7925 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7926 if (cust
->user
== NULL
)
7927 cust
->user
= immediate_parent
;
7932 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7935 recursively_compute_inclusions (result
, all_children
,
7936 all_type_symtabs
, iter
, cust
);
7940 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7944 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7946 gdb_assert (! per_cu
->is_debug_types
);
7948 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7951 struct dwarf2_per_cu_data
*per_cu_iter
;
7952 struct compunit_symtab
*compunit_symtab_iter
;
7953 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7954 htab_t all_children
, all_type_symtabs
;
7955 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7957 /* If we don't have a symtab, we can just skip this case. */
7961 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7962 NULL
, xcalloc
, xfree
);
7963 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7964 NULL
, xcalloc
, xfree
);
7967 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7971 recursively_compute_inclusions (&result_symtabs
, all_children
,
7972 all_type_symtabs
, per_cu_iter
,
7976 /* Now we have a transitive closure of all the included symtabs. */
7977 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7979 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7980 (len
+ 1) * sizeof (struct compunit_symtab
*));
7982 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7983 compunit_symtab_iter
);
7985 cust
->includes
[ix
] = compunit_symtab_iter
;
7986 cust
->includes
[len
] = NULL
;
7988 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7989 htab_delete (all_children
);
7990 htab_delete (all_type_symtabs
);
7994 /* Compute the 'includes' field for the symtabs of all the CUs we just
7998 process_cu_includes (void)
8001 struct dwarf2_per_cu_data
*iter
;
8004 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8008 if (! iter
->is_debug_types
)
8009 compute_compunit_symtab_includes (iter
);
8012 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8015 /* Generate full symbol information for PER_CU, whose DIEs have
8016 already been loaded into memory. */
8019 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8020 enum language pretend_language
)
8022 struct dwarf2_cu
*cu
= per_cu
->cu
;
8023 struct objfile
*objfile
= per_cu
->objfile
;
8024 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8025 CORE_ADDR lowpc
, highpc
;
8026 struct compunit_symtab
*cust
;
8027 struct cleanup
*back_to
, *delayed_list_cleanup
;
8029 struct block
*static_block
;
8032 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8035 back_to
= make_cleanup (really_free_pendings
, NULL
);
8036 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8038 cu
->list_in_scope
= &file_symbols
;
8040 cu
->language
= pretend_language
;
8041 cu
->language_defn
= language_def (cu
->language
);
8043 /* Do line number decoding in read_file_scope () */
8044 process_die (cu
->dies
, cu
);
8046 /* For now fudge the Go package. */
8047 if (cu
->language
== language_go
)
8048 fixup_go_packaging (cu
);
8050 /* Now that we have processed all the DIEs in the CU, all the types
8051 should be complete, and it should now be safe to compute all of the
8053 compute_delayed_physnames (cu
);
8054 do_cleanups (delayed_list_cleanup
);
8056 /* Some compilers don't define a DW_AT_high_pc attribute for the
8057 compilation unit. If the DW_AT_high_pc is missing, synthesize
8058 it, by scanning the DIE's below the compilation unit. */
8059 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8061 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8062 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8064 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8065 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8066 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8067 addrmap to help ensure it has an accurate map of pc values belonging to
8069 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8071 cust
= end_symtab_from_static_block (static_block
,
8072 SECT_OFF_TEXT (objfile
), 0);
8076 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8078 /* Set symtab language to language from DW_AT_language. If the
8079 compilation is from a C file generated by language preprocessors, do
8080 not set the language if it was already deduced by start_subfile. */
8081 if (!(cu
->language
== language_c
8082 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8083 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8085 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8086 produce DW_AT_location with location lists but it can be possibly
8087 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8088 there were bugs in prologue debug info, fixed later in GCC-4.5
8089 by "unwind info for epilogues" patch (which is not directly related).
8091 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8092 needed, it would be wrong due to missing DW_AT_producer there.
8094 Still one can confuse GDB by using non-standard GCC compilation
8095 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8097 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8098 cust
->locations_valid
= 1;
8100 if (gcc_4_minor
>= 5)
8101 cust
->epilogue_unwind_valid
= 1;
8103 cust
->call_site_htab
= cu
->call_site_htab
;
8106 if (dwarf2_per_objfile
->using_index
)
8107 per_cu
->v
.quick
->compunit_symtab
= cust
;
8110 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8111 pst
->compunit_symtab
= cust
;
8115 /* Push it for inclusion processing later. */
8116 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8118 do_cleanups (back_to
);
8121 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8122 already been loaded into memory. */
8125 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8126 enum language pretend_language
)
8128 struct dwarf2_cu
*cu
= per_cu
->cu
;
8129 struct objfile
*objfile
= per_cu
->objfile
;
8130 struct compunit_symtab
*cust
;
8131 struct cleanup
*back_to
, *delayed_list_cleanup
;
8132 struct signatured_type
*sig_type
;
8134 gdb_assert (per_cu
->is_debug_types
);
8135 sig_type
= (struct signatured_type
*) per_cu
;
8138 back_to
= make_cleanup (really_free_pendings
, NULL
);
8139 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8141 cu
->list_in_scope
= &file_symbols
;
8143 cu
->language
= pretend_language
;
8144 cu
->language_defn
= language_def (cu
->language
);
8146 /* The symbol tables are set up in read_type_unit_scope. */
8147 process_die (cu
->dies
, cu
);
8149 /* For now fudge the Go package. */
8150 if (cu
->language
== language_go
)
8151 fixup_go_packaging (cu
);
8153 /* Now that we have processed all the DIEs in the CU, all the types
8154 should be complete, and it should now be safe to compute all of the
8156 compute_delayed_physnames (cu
);
8157 do_cleanups (delayed_list_cleanup
);
8159 /* TUs share symbol tables.
8160 If this is the first TU to use this symtab, complete the construction
8161 of it with end_expandable_symtab. Otherwise, complete the addition of
8162 this TU's symbols to the existing symtab. */
8163 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8165 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8166 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8170 /* Set symtab language to language from DW_AT_language. If the
8171 compilation is from a C file generated by language preprocessors,
8172 do not set the language if it was already deduced by
8174 if (!(cu
->language
== language_c
8175 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8176 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8181 augment_type_symtab ();
8182 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8185 if (dwarf2_per_objfile
->using_index
)
8186 per_cu
->v
.quick
->compunit_symtab
= cust
;
8189 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8190 pst
->compunit_symtab
= cust
;
8194 do_cleanups (back_to
);
8197 /* Process an imported unit DIE. */
8200 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8202 struct attribute
*attr
;
8204 /* For now we don't handle imported units in type units. */
8205 if (cu
->per_cu
->is_debug_types
)
8207 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8208 " supported in type units [in module %s]"),
8209 objfile_name (cu
->objfile
));
8212 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8215 struct dwarf2_per_cu_data
*per_cu
;
8216 struct symtab
*imported_symtab
;
8220 offset
= dwarf2_get_ref_die_offset (attr
);
8221 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8222 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8224 /* If necessary, add it to the queue and load its DIEs. */
8225 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8226 load_full_comp_unit (per_cu
, cu
->language
);
8228 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8233 /* Reset the in_process bit of a die. */
8236 reset_die_in_process (void *arg
)
8238 struct die_info
*die
= arg
;
8240 die
->in_process
= 0;
8243 /* Process a die and its children. */
8246 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8248 struct cleanup
*in_process
;
8250 /* We should only be processing those not already in process. */
8251 gdb_assert (!die
->in_process
);
8253 die
->in_process
= 1;
8254 in_process
= make_cleanup (reset_die_in_process
,die
);
8258 case DW_TAG_padding
:
8260 case DW_TAG_compile_unit
:
8261 case DW_TAG_partial_unit
:
8262 read_file_scope (die
, cu
);
8264 case DW_TAG_type_unit
:
8265 read_type_unit_scope (die
, cu
);
8267 case DW_TAG_subprogram
:
8268 case DW_TAG_inlined_subroutine
:
8269 read_func_scope (die
, cu
);
8271 case DW_TAG_lexical_block
:
8272 case DW_TAG_try_block
:
8273 case DW_TAG_catch_block
:
8274 read_lexical_block_scope (die
, cu
);
8276 case DW_TAG_GNU_call_site
:
8277 read_call_site_scope (die
, cu
);
8279 case DW_TAG_class_type
:
8280 case DW_TAG_interface_type
:
8281 case DW_TAG_structure_type
:
8282 case DW_TAG_union_type
:
8283 process_structure_scope (die
, cu
);
8285 case DW_TAG_enumeration_type
:
8286 process_enumeration_scope (die
, cu
);
8289 /* These dies have a type, but processing them does not create
8290 a symbol or recurse to process the children. Therefore we can
8291 read them on-demand through read_type_die. */
8292 case DW_TAG_subroutine_type
:
8293 case DW_TAG_set_type
:
8294 case DW_TAG_array_type
:
8295 case DW_TAG_pointer_type
:
8296 case DW_TAG_ptr_to_member_type
:
8297 case DW_TAG_reference_type
:
8298 case DW_TAG_string_type
:
8301 case DW_TAG_base_type
:
8302 case DW_TAG_subrange_type
:
8303 case DW_TAG_typedef
:
8304 /* Add a typedef symbol for the type definition, if it has a
8306 new_symbol (die
, read_type_die (die
, cu
), cu
);
8308 case DW_TAG_common_block
:
8309 read_common_block (die
, cu
);
8311 case DW_TAG_common_inclusion
:
8313 case DW_TAG_namespace
:
8314 cu
->processing_has_namespace_info
= 1;
8315 read_namespace (die
, cu
);
8318 cu
->processing_has_namespace_info
= 1;
8319 read_module (die
, cu
);
8321 case DW_TAG_imported_declaration
:
8322 cu
->processing_has_namespace_info
= 1;
8323 if (read_namespace_alias (die
, cu
))
8325 /* The declaration is not a global namespace alias: fall through. */
8326 case DW_TAG_imported_module
:
8327 cu
->processing_has_namespace_info
= 1;
8328 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8329 || cu
->language
!= language_fortran
))
8330 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8331 dwarf_tag_name (die
->tag
));
8332 read_import_statement (die
, cu
);
8335 case DW_TAG_imported_unit
:
8336 process_imported_unit_die (die
, cu
);
8340 new_symbol (die
, NULL
, cu
);
8344 do_cleanups (in_process
);
8347 /* DWARF name computation. */
8349 /* A helper function for dwarf2_compute_name which determines whether DIE
8350 needs to have the name of the scope prepended to the name listed in the
8354 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8356 struct attribute
*attr
;
8360 case DW_TAG_namespace
:
8361 case DW_TAG_typedef
:
8362 case DW_TAG_class_type
:
8363 case DW_TAG_interface_type
:
8364 case DW_TAG_structure_type
:
8365 case DW_TAG_union_type
:
8366 case DW_TAG_enumeration_type
:
8367 case DW_TAG_enumerator
:
8368 case DW_TAG_subprogram
:
8369 case DW_TAG_inlined_subroutine
:
8371 case DW_TAG_imported_declaration
:
8374 case DW_TAG_variable
:
8375 case DW_TAG_constant
:
8376 /* We only need to prefix "globally" visible variables. These include
8377 any variable marked with DW_AT_external or any variable that
8378 lives in a namespace. [Variables in anonymous namespaces
8379 require prefixing, but they are not DW_AT_external.] */
8381 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8383 struct dwarf2_cu
*spec_cu
= cu
;
8385 return die_needs_namespace (die_specification (die
, &spec_cu
),
8389 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8390 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8391 && die
->parent
->tag
!= DW_TAG_module
)
8393 /* A variable in a lexical block of some kind does not need a
8394 namespace, even though in C++ such variables may be external
8395 and have a mangled name. */
8396 if (die
->parent
->tag
== DW_TAG_lexical_block
8397 || die
->parent
->tag
== DW_TAG_try_block
8398 || die
->parent
->tag
== DW_TAG_catch_block
8399 || die
->parent
->tag
== DW_TAG_subprogram
)
8408 /* Retrieve the last character from a mem_file. */
8411 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8413 char *last_char_p
= (char *) object
;
8416 *last_char_p
= buffer
[length
- 1];
8419 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8420 compute the physname for the object, which include a method's:
8421 - formal parameters (C++/Java),
8422 - receiver type (Go),
8423 - return type (Java).
8425 The term "physname" is a bit confusing.
8426 For C++, for example, it is the demangled name.
8427 For Go, for example, it's the mangled name.
8429 For Ada, return the DIE's linkage name rather than the fully qualified
8430 name. PHYSNAME is ignored..
8432 The result is allocated on the objfile_obstack and canonicalized. */
8435 dwarf2_compute_name (const char *name
,
8436 struct die_info
*die
, struct dwarf2_cu
*cu
,
8439 struct objfile
*objfile
= cu
->objfile
;
8442 name
= dwarf2_name (die
, cu
);
8444 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8445 compute it by typename_concat inside GDB. */
8446 if (cu
->language
== language_ada
8447 || (cu
->language
== language_fortran
&& physname
))
8449 /* For Ada unit, we prefer the linkage name over the name, as
8450 the former contains the exported name, which the user expects
8451 to be able to reference. Ideally, we want the user to be able
8452 to reference this entity using either natural or linkage name,
8453 but we haven't started looking at this enhancement yet. */
8454 struct attribute
*attr
;
8456 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8458 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8459 if (attr
&& DW_STRING (attr
))
8460 return DW_STRING (attr
);
8463 /* These are the only languages we know how to qualify names in. */
8465 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8466 || cu
->language
== language_fortran
|| cu
->language
== language_d
))
8468 if (die_needs_namespace (die
, cu
))
8472 struct ui_file
*buf
;
8473 char *intermediate_name
;
8474 const char *canonical_name
= NULL
;
8476 prefix
= determine_prefix (die
, cu
);
8477 buf
= mem_fileopen ();
8478 if (*prefix
!= '\0')
8480 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8483 fputs_unfiltered (prefixed_name
, buf
);
8484 xfree (prefixed_name
);
8487 fputs_unfiltered (name
, buf
);
8489 /* Template parameters may be specified in the DIE's DW_AT_name, or
8490 as children with DW_TAG_template_type_param or
8491 DW_TAG_value_type_param. If the latter, add them to the name
8492 here. If the name already has template parameters, then
8493 skip this step; some versions of GCC emit both, and
8494 it is more efficient to use the pre-computed name.
8496 Something to keep in mind about this process: it is very
8497 unlikely, or in some cases downright impossible, to produce
8498 something that will match the mangled name of a function.
8499 If the definition of the function has the same debug info,
8500 we should be able to match up with it anyway. But fallbacks
8501 using the minimal symbol, for instance to find a method
8502 implemented in a stripped copy of libstdc++, will not work.
8503 If we do not have debug info for the definition, we will have to
8504 match them up some other way.
8506 When we do name matching there is a related problem with function
8507 templates; two instantiated function templates are allowed to
8508 differ only by their return types, which we do not add here. */
8510 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8512 struct attribute
*attr
;
8513 struct die_info
*child
;
8516 die
->building_fullname
= 1;
8518 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8522 const gdb_byte
*bytes
;
8523 struct dwarf2_locexpr_baton
*baton
;
8526 if (child
->tag
!= DW_TAG_template_type_param
8527 && child
->tag
!= DW_TAG_template_value_param
)
8532 fputs_unfiltered ("<", buf
);
8536 fputs_unfiltered (", ", buf
);
8538 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8541 complaint (&symfile_complaints
,
8542 _("template parameter missing DW_AT_type"));
8543 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8546 type
= die_type (child
, cu
);
8548 if (child
->tag
== DW_TAG_template_type_param
)
8550 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8554 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8557 complaint (&symfile_complaints
,
8558 _("template parameter missing "
8559 "DW_AT_const_value"));
8560 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8564 dwarf2_const_value_attr (attr
, type
, name
,
8565 &cu
->comp_unit_obstack
, cu
,
8566 &value
, &bytes
, &baton
);
8568 if (TYPE_NOSIGN (type
))
8569 /* GDB prints characters as NUMBER 'CHAR'. If that's
8570 changed, this can use value_print instead. */
8571 c_printchar (value
, type
, buf
);
8574 struct value_print_options opts
;
8577 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8581 else if (bytes
!= NULL
)
8583 v
= allocate_value (type
);
8584 memcpy (value_contents_writeable (v
), bytes
,
8585 TYPE_LENGTH (type
));
8588 v
= value_from_longest (type
, value
);
8590 /* Specify decimal so that we do not depend on
8592 get_formatted_print_options (&opts
, 'd');
8594 value_print (v
, buf
, &opts
);
8600 die
->building_fullname
= 0;
8604 /* Close the argument list, with a space if necessary
8605 (nested templates). */
8606 char last_char
= '\0';
8607 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8608 if (last_char
== '>')
8609 fputs_unfiltered (" >", buf
);
8611 fputs_unfiltered (">", buf
);
8615 /* For Java and C++ methods, append formal parameter type
8616 information, if PHYSNAME. */
8618 if (physname
&& die
->tag
== DW_TAG_subprogram
8619 && (cu
->language
== language_cplus
8620 || cu
->language
== language_java
))
8622 struct type
*type
= read_type_die (die
, cu
);
8624 c_type_print_args (type
, buf
, 1, cu
->language
,
8625 &type_print_raw_options
);
8627 if (cu
->language
== language_java
)
8629 /* For java, we must append the return type to method
8631 if (die
->tag
== DW_TAG_subprogram
)
8632 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8633 0, 0, &type_print_raw_options
);
8635 else if (cu
->language
== language_cplus
)
8637 /* Assume that an artificial first parameter is
8638 "this", but do not crash if it is not. RealView
8639 marks unnamed (and thus unused) parameters as
8640 artificial; there is no way to differentiate
8642 if (TYPE_NFIELDS (type
) > 0
8643 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8644 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8645 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8647 fputs_unfiltered (" const", buf
);
8651 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8652 ui_file_delete (buf
);
8654 if (cu
->language
== language_cplus
)
8656 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8657 &objfile
->per_bfd
->storage_obstack
);
8659 /* If we only computed INTERMEDIATE_NAME, or if
8660 INTERMEDIATE_NAME is already canonical, then we need to
8661 copy it to the appropriate obstack. */
8662 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8663 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8665 strlen (intermediate_name
));
8667 name
= canonical_name
;
8669 xfree (intermediate_name
);
8676 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8677 If scope qualifiers are appropriate they will be added. The result
8678 will be allocated on the storage_obstack, or NULL if the DIE does
8679 not have a name. NAME may either be from a previous call to
8680 dwarf2_name or NULL.
8682 The output string will be canonicalized (if C++/Java). */
8685 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8687 return dwarf2_compute_name (name
, die
, cu
, 0);
8690 /* Construct a physname for the given DIE in CU. NAME may either be
8691 from a previous call to dwarf2_name or NULL. The result will be
8692 allocated on the objfile_objstack or NULL if the DIE does not have a
8695 The output string will be canonicalized (if C++/Java). */
8698 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8700 struct objfile
*objfile
= cu
->objfile
;
8701 struct attribute
*attr
;
8702 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8703 struct cleanup
*back_to
;
8706 /* In this case dwarf2_compute_name is just a shortcut not building anything
8708 if (!die_needs_namespace (die
, cu
))
8709 return dwarf2_compute_name (name
, die
, cu
, 1);
8711 back_to
= make_cleanup (null_cleanup
, NULL
);
8713 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8715 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8717 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8719 if (attr
&& DW_STRING (attr
))
8723 mangled
= DW_STRING (attr
);
8725 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8726 type. It is easier for GDB users to search for such functions as
8727 `name(params)' than `long name(params)'. In such case the minimal
8728 symbol names do not match the full symbol names but for template
8729 functions there is never a need to look up their definition from their
8730 declaration so the only disadvantage remains the minimal symbol
8731 variant `long name(params)' does not have the proper inferior type.
8734 if (cu
->language
== language_go
)
8736 /* This is a lie, but we already lie to the caller new_symbol_full.
8737 new_symbol_full assumes we return the mangled name.
8738 This just undoes that lie until things are cleaned up. */
8743 demangled
= gdb_demangle (mangled
,
8744 (DMGL_PARAMS
| DMGL_ANSI
8745 | (cu
->language
== language_java
8746 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8751 make_cleanup (xfree
, demangled
);
8761 if (canon
== NULL
|| check_physname
)
8763 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8765 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8767 /* It may not mean a bug in GDB. The compiler could also
8768 compute DW_AT_linkage_name incorrectly. But in such case
8769 GDB would need to be bug-to-bug compatible. */
8771 complaint (&symfile_complaints
,
8772 _("Computed physname <%s> does not match demangled <%s> "
8773 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8774 physname
, canon
, mangled
, die
->offset
.sect_off
,
8775 objfile_name (objfile
));
8777 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8778 is available here - over computed PHYSNAME. It is safer
8779 against both buggy GDB and buggy compilers. */
8793 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8794 retval
, strlen (retval
));
8796 do_cleanups (back_to
);
8800 /* Inspect DIE in CU for a namespace alias. If one exists, record
8801 a new symbol for it.
8803 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8806 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8808 struct attribute
*attr
;
8810 /* If the die does not have a name, this is not a namespace
8812 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8816 struct die_info
*d
= die
;
8817 struct dwarf2_cu
*imported_cu
= cu
;
8819 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8820 keep inspecting DIEs until we hit the underlying import. */
8821 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8822 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8824 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8828 d
= follow_die_ref (d
, attr
, &imported_cu
);
8829 if (d
->tag
!= DW_TAG_imported_declaration
)
8833 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8835 complaint (&symfile_complaints
,
8836 _("DIE at 0x%x has too many recursively imported "
8837 "declarations"), d
->offset
.sect_off
);
8844 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8846 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8847 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8849 /* This declaration is a global namespace alias. Add
8850 a symbol for it whose type is the aliased namespace. */
8851 new_symbol (die
, type
, cu
);
8860 /* Return the using directives repository (global or local?) to use in the
8861 current context for LANGUAGE.
8863 For Ada, imported declarations can materialize renamings, which *may* be
8864 global. However it is impossible (for now?) in DWARF to distinguish
8865 "external" imported declarations and "static" ones. As all imported
8866 declarations seem to be static in all other languages, make them all CU-wide
8867 global only in Ada. */
8869 static struct using_direct
**
8870 using_directives (enum language language
)
8872 if (language
== language_ada
&& context_stack_depth
== 0)
8873 return &global_using_directives
;
8875 return &local_using_directives
;
8878 /* Read the import statement specified by the given die and record it. */
8881 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8883 struct objfile
*objfile
= cu
->objfile
;
8884 struct attribute
*import_attr
;
8885 struct die_info
*imported_die
, *child_die
;
8886 struct dwarf2_cu
*imported_cu
;
8887 const char *imported_name
;
8888 const char *imported_name_prefix
;
8889 const char *canonical_name
;
8890 const char *import_alias
;
8891 const char *imported_declaration
= NULL
;
8892 const char *import_prefix
;
8893 VEC (const_char_ptr
) *excludes
= NULL
;
8894 struct cleanup
*cleanups
;
8896 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8897 if (import_attr
== NULL
)
8899 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8900 dwarf_tag_name (die
->tag
));
8905 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8906 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8907 if (imported_name
== NULL
)
8909 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8911 The import in the following code:
8925 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8926 <52> DW_AT_decl_file : 1
8927 <53> DW_AT_decl_line : 6
8928 <54> DW_AT_import : <0x75>
8929 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8931 <5b> DW_AT_decl_file : 1
8932 <5c> DW_AT_decl_line : 2
8933 <5d> DW_AT_type : <0x6e>
8935 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8936 <76> DW_AT_byte_size : 4
8937 <77> DW_AT_encoding : 5 (signed)
8939 imports the wrong die ( 0x75 instead of 0x58 ).
8940 This case will be ignored until the gcc bug is fixed. */
8944 /* Figure out the local name after import. */
8945 import_alias
= dwarf2_name (die
, cu
);
8947 /* Figure out where the statement is being imported to. */
8948 import_prefix
= determine_prefix (die
, cu
);
8950 /* Figure out what the scope of the imported die is and prepend it
8951 to the name of the imported die. */
8952 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8954 if (imported_die
->tag
!= DW_TAG_namespace
8955 && imported_die
->tag
!= DW_TAG_module
)
8957 imported_declaration
= imported_name
;
8958 canonical_name
= imported_name_prefix
;
8960 else if (strlen (imported_name_prefix
) > 0)
8961 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8962 imported_name_prefix
,
8963 (cu
->language
== language_d
? "." : "::"),
8964 imported_name
, (char *) NULL
);
8966 canonical_name
= imported_name
;
8968 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8970 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8971 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8972 child_die
= sibling_die (child_die
))
8974 /* DWARF-4: A Fortran use statement with a “rename list” may be
8975 represented by an imported module entry with an import attribute
8976 referring to the module and owned entries corresponding to those
8977 entities that are renamed as part of being imported. */
8979 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8981 complaint (&symfile_complaints
,
8982 _("child DW_TAG_imported_declaration expected "
8983 "- DIE at 0x%x [in module %s]"),
8984 child_die
->offset
.sect_off
, objfile_name (objfile
));
8988 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8989 if (import_attr
== NULL
)
8991 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8992 dwarf_tag_name (child_die
->tag
));
8997 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8999 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9000 if (imported_name
== NULL
)
9002 complaint (&symfile_complaints
,
9003 _("child DW_TAG_imported_declaration has unknown "
9004 "imported name - DIE at 0x%x [in module %s]"),
9005 child_die
->offset
.sect_off
, objfile_name (objfile
));
9009 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9011 process_die (child_die
, cu
);
9014 add_using_directive (using_directives (cu
->language
),
9018 imported_declaration
,
9021 &objfile
->objfile_obstack
);
9023 do_cleanups (cleanups
);
9026 /* Cleanup function for handle_DW_AT_stmt_list. */
9029 free_cu_line_header (void *arg
)
9031 struct dwarf2_cu
*cu
= arg
;
9033 free_line_header (cu
->line_header
);
9034 cu
->line_header
= NULL
;
9037 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9038 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9039 this, it was first present in GCC release 4.3.0. */
9042 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9044 if (!cu
->checked_producer
)
9045 check_producer (cu
);
9047 return cu
->producer_is_gcc_lt_4_3
;
9051 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9052 const char **name
, const char **comp_dir
)
9054 struct attribute
*attr
;
9059 /* Find the filename. Do not use dwarf2_name here, since the filename
9060 is not a source language identifier. */
9061 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9064 *name
= DW_STRING (attr
);
9067 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9069 *comp_dir
= DW_STRING (attr
);
9070 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9071 && IS_ABSOLUTE_PATH (*name
))
9073 char *d
= ldirname (*name
);
9077 make_cleanup (xfree
, d
);
9079 if (*comp_dir
!= NULL
)
9081 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9082 directory, get rid of it. */
9083 char *cp
= strchr (*comp_dir
, ':');
9085 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9090 *name
= "<unknown>";
9093 /* Handle DW_AT_stmt_list for a compilation unit.
9094 DIE is the DW_TAG_compile_unit die for CU.
9095 COMP_DIR is the compilation directory. LOWPC is passed to
9096 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9099 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9100 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9102 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9103 struct attribute
*attr
;
9104 unsigned int line_offset
;
9105 struct line_header line_header_local
;
9106 hashval_t line_header_local_hash
;
9111 gdb_assert (! cu
->per_cu
->is_debug_types
);
9113 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9117 line_offset
= DW_UNSND (attr
);
9119 /* The line header hash table is only created if needed (it exists to
9120 prevent redundant reading of the line table for partial_units).
9121 If we're given a partial_unit, we'll need it. If we're given a
9122 compile_unit, then use the line header hash table if it's already
9123 created, but don't create one just yet. */
9125 if (dwarf2_per_objfile
->line_header_hash
== NULL
9126 && die
->tag
== DW_TAG_partial_unit
)
9128 dwarf2_per_objfile
->line_header_hash
9129 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9130 line_header_eq_voidp
,
9131 free_line_header_voidp
,
9132 &objfile
->objfile_obstack
,
9133 hashtab_obstack_allocate
,
9134 dummy_obstack_deallocate
);
9137 line_header_local
.offset
.sect_off
= line_offset
;
9138 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9139 line_header_local_hash
= line_header_hash (&line_header_local
);
9140 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9142 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9144 line_header_local_hash
, NO_INSERT
);
9146 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9147 is not present in *SLOT (since if there is something in *SLOT then
9148 it will be for a partial_unit). */
9149 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9151 gdb_assert (*slot
!= NULL
);
9152 cu
->line_header
= *slot
;
9157 /* dwarf_decode_line_header does not yet provide sufficient information.
9158 We always have to call also dwarf_decode_lines for it. */
9159 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9160 if (cu
->line_header
== NULL
)
9163 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9167 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9169 line_header_local_hash
, INSERT
);
9170 gdb_assert (slot
!= NULL
);
9172 if (slot
!= NULL
&& *slot
== NULL
)
9174 /* This newly decoded line number information unit will be owned
9175 by line_header_hash hash table. */
9176 *slot
= cu
->line_header
;
9180 /* We cannot free any current entry in (*slot) as that struct line_header
9181 may be already used by multiple CUs. Create only temporary decoded
9182 line_header for this CU - it may happen at most once for each line
9183 number information unit. And if we're not using line_header_hash
9184 then this is what we want as well. */
9185 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9186 make_cleanup (free_cu_line_header
, cu
);
9188 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9189 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9193 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9196 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9198 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9199 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9200 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9201 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9202 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9203 struct attribute
*attr
;
9204 const char *name
= NULL
;
9205 const char *comp_dir
= NULL
;
9206 struct die_info
*child_die
;
9207 bfd
*abfd
= objfile
->obfd
;
9210 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9212 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9214 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9215 from finish_block. */
9216 if (lowpc
== ((CORE_ADDR
) -1))
9218 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9220 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9222 prepare_one_comp_unit (cu
, die
, cu
->language
);
9224 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9225 standardised yet. As a workaround for the language detection we fall
9226 back to the DW_AT_producer string. */
9227 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9228 cu
->language
= language_opencl
;
9230 /* Similar hack for Go. */
9231 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9232 set_cu_language (DW_LANG_Go
, cu
);
9234 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9236 /* Decode line number information if present. We do this before
9237 processing child DIEs, so that the line header table is available
9238 for DW_AT_decl_file. */
9239 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9241 /* Process all dies in compilation unit. */
9242 if (die
->child
!= NULL
)
9244 child_die
= die
->child
;
9245 while (child_die
&& child_die
->tag
)
9247 process_die (child_die
, cu
);
9248 child_die
= sibling_die (child_die
);
9252 /* Decode macro information, if present. Dwarf 2 macro information
9253 refers to information in the line number info statement program
9254 header, so we can only read it if we've read the header
9256 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9257 if (attr
&& cu
->line_header
)
9259 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9260 complaint (&symfile_complaints
,
9261 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9263 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9267 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9268 if (attr
&& cu
->line_header
)
9270 unsigned int macro_offset
= DW_UNSND (attr
);
9272 dwarf_decode_macros (cu
, macro_offset
, 0);
9276 do_cleanups (back_to
);
9279 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9280 Create the set of symtabs used by this TU, or if this TU is sharing
9281 symtabs with another TU and the symtabs have already been created
9282 then restore those symtabs in the line header.
9283 We don't need the pc/line-number mapping for type units. */
9286 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9288 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9289 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9290 struct type_unit_group
*tu_group
;
9292 struct line_header
*lh
;
9293 struct attribute
*attr
;
9294 unsigned int i
, line_offset
;
9295 struct signatured_type
*sig_type
;
9297 gdb_assert (per_cu
->is_debug_types
);
9298 sig_type
= (struct signatured_type
*) per_cu
;
9300 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9302 /* If we're using .gdb_index (includes -readnow) then
9303 per_cu->type_unit_group may not have been set up yet. */
9304 if (sig_type
->type_unit_group
== NULL
)
9305 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9306 tu_group
= sig_type
->type_unit_group
;
9308 /* If we've already processed this stmt_list there's no real need to
9309 do it again, we could fake it and just recreate the part we need
9310 (file name,index -> symtab mapping). If data shows this optimization
9311 is useful we can do it then. */
9312 first_time
= tu_group
->compunit_symtab
== NULL
;
9314 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9319 line_offset
= DW_UNSND (attr
);
9320 lh
= dwarf_decode_line_header (line_offset
, cu
);
9325 dwarf2_start_symtab (cu
, "", NULL
, 0);
9328 gdb_assert (tu_group
->symtabs
== NULL
);
9329 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9334 cu
->line_header
= lh
;
9335 make_cleanup (free_cu_line_header
, cu
);
9339 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9341 tu_group
->num_symtabs
= lh
->num_file_names
;
9342 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9344 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9346 const char *dir
= NULL
;
9347 struct file_entry
*fe
= &lh
->file_names
[i
];
9349 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9350 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9351 dwarf2_start_subfile (fe
->name
, dir
);
9353 if (current_subfile
->symtab
== NULL
)
9355 /* NOTE: start_subfile will recognize when it's been passed
9356 a file it has already seen. So we can't assume there's a
9357 simple mapping from lh->file_names to subfiles, plus
9358 lh->file_names may contain dups. */
9359 current_subfile
->symtab
9360 = allocate_symtab (cust
, current_subfile
->name
);
9363 fe
->symtab
= current_subfile
->symtab
;
9364 tu_group
->symtabs
[i
] = fe
->symtab
;
9369 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9371 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9373 struct file_entry
*fe
= &lh
->file_names
[i
];
9375 fe
->symtab
= tu_group
->symtabs
[i
];
9379 /* The main symtab is allocated last. Type units don't have DW_AT_name
9380 so they don't have a "real" (so to speak) symtab anyway.
9381 There is later code that will assign the main symtab to all symbols
9382 that don't have one. We need to handle the case of a symbol with a
9383 missing symtab (DW_AT_decl_file) anyway. */
9386 /* Process DW_TAG_type_unit.
9387 For TUs we want to skip the first top level sibling if it's not the
9388 actual type being defined by this TU. In this case the first top
9389 level sibling is there to provide context only. */
9392 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9394 struct die_info
*child_die
;
9396 prepare_one_comp_unit (cu
, die
, language_minimal
);
9398 /* Initialize (or reinitialize) the machinery for building symtabs.
9399 We do this before processing child DIEs, so that the line header table
9400 is available for DW_AT_decl_file. */
9401 setup_type_unit_groups (die
, cu
);
9403 if (die
->child
!= NULL
)
9405 child_die
= die
->child
;
9406 while (child_die
&& child_die
->tag
)
9408 process_die (child_die
, cu
);
9409 child_die
= sibling_die (child_die
);
9416 http://gcc.gnu.org/wiki/DebugFission
9417 http://gcc.gnu.org/wiki/DebugFissionDWP
9419 To simplify handling of both DWO files ("object" files with the DWARF info)
9420 and DWP files (a file with the DWOs packaged up into one file), we treat
9421 DWP files as having a collection of virtual DWO files. */
9424 hash_dwo_file (const void *item
)
9426 const struct dwo_file
*dwo_file
= item
;
9429 hash
= htab_hash_string (dwo_file
->dwo_name
);
9430 if (dwo_file
->comp_dir
!= NULL
)
9431 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9436 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9438 const struct dwo_file
*lhs
= item_lhs
;
9439 const struct dwo_file
*rhs
= item_rhs
;
9441 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9443 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9444 return lhs
->comp_dir
== rhs
->comp_dir
;
9445 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9448 /* Allocate a hash table for DWO files. */
9451 allocate_dwo_file_hash_table (void)
9453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9455 return htab_create_alloc_ex (41,
9459 &objfile
->objfile_obstack
,
9460 hashtab_obstack_allocate
,
9461 dummy_obstack_deallocate
);
9464 /* Lookup DWO file DWO_NAME. */
9467 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9469 struct dwo_file find_entry
;
9472 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9473 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9475 memset (&find_entry
, 0, sizeof (find_entry
));
9476 find_entry
.dwo_name
= dwo_name
;
9477 find_entry
.comp_dir
= comp_dir
;
9478 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9484 hash_dwo_unit (const void *item
)
9486 const struct dwo_unit
*dwo_unit
= item
;
9488 /* This drops the top 32 bits of the id, but is ok for a hash. */
9489 return dwo_unit
->signature
;
9493 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9495 const struct dwo_unit
*lhs
= item_lhs
;
9496 const struct dwo_unit
*rhs
= item_rhs
;
9498 /* The signature is assumed to be unique within the DWO file.
9499 So while object file CU dwo_id's always have the value zero,
9500 that's OK, assuming each object file DWO file has only one CU,
9501 and that's the rule for now. */
9502 return lhs
->signature
== rhs
->signature
;
9505 /* Allocate a hash table for DWO CUs,TUs.
9506 There is one of these tables for each of CUs,TUs for each DWO file. */
9509 allocate_dwo_unit_table (struct objfile
*objfile
)
9511 /* Start out with a pretty small number.
9512 Generally DWO files contain only one CU and maybe some TUs. */
9513 return htab_create_alloc_ex (3,
9517 &objfile
->objfile_obstack
,
9518 hashtab_obstack_allocate
,
9519 dummy_obstack_deallocate
);
9522 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9524 struct create_dwo_cu_data
9526 struct dwo_file
*dwo_file
;
9527 struct dwo_unit dwo_unit
;
9530 /* die_reader_func for create_dwo_cu. */
9533 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9534 const gdb_byte
*info_ptr
,
9535 struct die_info
*comp_unit_die
,
9539 struct dwarf2_cu
*cu
= reader
->cu
;
9540 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9541 sect_offset offset
= cu
->per_cu
->offset
;
9542 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9543 struct create_dwo_cu_data
*data
= datap
;
9544 struct dwo_file
*dwo_file
= data
->dwo_file
;
9545 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9546 struct attribute
*attr
;
9548 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9551 complaint (&symfile_complaints
,
9552 _("Dwarf Error: debug entry at offset 0x%x is missing"
9553 " its dwo_id [in module %s]"),
9554 offset
.sect_off
, dwo_file
->dwo_name
);
9558 dwo_unit
->dwo_file
= dwo_file
;
9559 dwo_unit
->signature
= DW_UNSND (attr
);
9560 dwo_unit
->section
= section
;
9561 dwo_unit
->offset
= offset
;
9562 dwo_unit
->length
= cu
->per_cu
->length
;
9564 if (dwarf_read_debug
)
9565 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9566 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9569 /* Create the dwo_unit for the lone CU in DWO_FILE.
9570 Note: This function processes DWO files only, not DWP files. */
9572 static struct dwo_unit
*
9573 create_dwo_cu (struct dwo_file
*dwo_file
)
9575 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9576 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9579 const gdb_byte
*info_ptr
, *end_ptr
;
9580 struct create_dwo_cu_data create_dwo_cu_data
;
9581 struct dwo_unit
*dwo_unit
;
9583 dwarf2_read_section (objfile
, section
);
9584 info_ptr
= section
->buffer
;
9586 if (info_ptr
== NULL
)
9589 /* We can't set abfd until now because the section may be empty or
9590 not present, in which case section->asection will be NULL. */
9591 abfd
= get_section_bfd_owner (section
);
9593 if (dwarf_read_debug
)
9595 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9596 get_section_name (section
),
9597 get_section_file_name (section
));
9600 create_dwo_cu_data
.dwo_file
= dwo_file
;
9603 end_ptr
= info_ptr
+ section
->size
;
9604 while (info_ptr
< end_ptr
)
9606 struct dwarf2_per_cu_data per_cu
;
9608 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9609 sizeof (create_dwo_cu_data
.dwo_unit
));
9610 memset (&per_cu
, 0, sizeof (per_cu
));
9611 per_cu
.objfile
= objfile
;
9612 per_cu
.is_debug_types
= 0;
9613 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9614 per_cu
.section
= section
;
9616 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9617 create_dwo_cu_reader
,
9618 &create_dwo_cu_data
);
9620 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9622 /* If we've already found one, complain. We only support one
9623 because having more than one requires hacking the dwo_name of
9624 each to match, which is highly unlikely to happen. */
9625 if (dwo_unit
!= NULL
)
9627 complaint (&symfile_complaints
,
9628 _("Multiple CUs in DWO file %s [in module %s]"),
9629 dwo_file
->dwo_name
, objfile_name (objfile
));
9633 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9634 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9637 info_ptr
+= per_cu
.length
;
9643 /* DWP file .debug_{cu,tu}_index section format:
9644 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9648 Both index sections have the same format, and serve to map a 64-bit
9649 signature to a set of section numbers. Each section begins with a header,
9650 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9651 indexes, and a pool of 32-bit section numbers. The index sections will be
9652 aligned at 8-byte boundaries in the file.
9654 The index section header consists of:
9656 V, 32 bit version number
9658 N, 32 bit number of compilation units or type units in the index
9659 M, 32 bit number of slots in the hash table
9661 Numbers are recorded using the byte order of the application binary.
9663 The hash table begins at offset 16 in the section, and consists of an array
9664 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9665 order of the application binary). Unused slots in the hash table are 0.
9666 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9668 The parallel table begins immediately after the hash table
9669 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9670 array of 32-bit indexes (using the byte order of the application binary),
9671 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9672 table contains a 32-bit index into the pool of section numbers. For unused
9673 hash table slots, the corresponding entry in the parallel table will be 0.
9675 The pool of section numbers begins immediately following the hash table
9676 (at offset 16 + 12 * M from the beginning of the section). The pool of
9677 section numbers consists of an array of 32-bit words (using the byte order
9678 of the application binary). Each item in the array is indexed starting
9679 from 0. The hash table entry provides the index of the first section
9680 number in the set. Additional section numbers in the set follow, and the
9681 set is terminated by a 0 entry (section number 0 is not used in ELF).
9683 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9684 section must be the first entry in the set, and the .debug_abbrev.dwo must
9685 be the second entry. Other members of the set may follow in any order.
9691 DWP Version 2 combines all the .debug_info, etc. sections into one,
9692 and the entries in the index tables are now offsets into these sections.
9693 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9696 Index Section Contents:
9698 Hash Table of Signatures dwp_hash_table.hash_table
9699 Parallel Table of Indices dwp_hash_table.unit_table
9700 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9701 Table of Section Sizes dwp_hash_table.v2.sizes
9703 The index section header consists of:
9705 V, 32 bit version number
9706 L, 32 bit number of columns in the table of section offsets
9707 N, 32 bit number of compilation units or type units in the index
9708 M, 32 bit number of slots in the hash table
9710 Numbers are recorded using the byte order of the application binary.
9712 The hash table has the same format as version 1.
9713 The parallel table of indices has the same format as version 1,
9714 except that the entries are origin-1 indices into the table of sections
9715 offsets and the table of section sizes.
9717 The table of offsets begins immediately following the parallel table
9718 (at offset 16 + 12 * M from the beginning of the section). The table is
9719 a two-dimensional array of 32-bit words (using the byte order of the
9720 application binary), with L columns and N+1 rows, in row-major order.
9721 Each row in the array is indexed starting from 0. The first row provides
9722 a key to the remaining rows: each column in this row provides an identifier
9723 for a debug section, and the offsets in the same column of subsequent rows
9724 refer to that section. The section identifiers are:
9726 DW_SECT_INFO 1 .debug_info.dwo
9727 DW_SECT_TYPES 2 .debug_types.dwo
9728 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9729 DW_SECT_LINE 4 .debug_line.dwo
9730 DW_SECT_LOC 5 .debug_loc.dwo
9731 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9732 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9733 DW_SECT_MACRO 8 .debug_macro.dwo
9735 The offsets provided by the CU and TU index sections are the base offsets
9736 for the contributions made by each CU or TU to the corresponding section
9737 in the package file. Each CU and TU header contains an abbrev_offset
9738 field, used to find the abbreviations table for that CU or TU within the
9739 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9740 be interpreted as relative to the base offset given in the index section.
9741 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9742 should be interpreted as relative to the base offset for .debug_line.dwo,
9743 and offsets into other debug sections obtained from DWARF attributes should
9744 also be interpreted as relative to the corresponding base offset.
9746 The table of sizes begins immediately following the table of offsets.
9747 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9748 with L columns and N rows, in row-major order. Each row in the array is
9749 indexed starting from 1 (row 0 is shared by the two tables).
9753 Hash table lookup is handled the same in version 1 and 2:
9755 We assume that N and M will not exceed 2^32 - 1.
9756 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9758 Given a 64-bit compilation unit signature or a type signature S, an entry
9759 in the hash table is located as follows:
9761 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9762 the low-order k bits all set to 1.
9764 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9766 3) If the hash table entry at index H matches the signature, use that
9767 entry. If the hash table entry at index H is unused (all zeroes),
9768 terminate the search: the signature is not present in the table.
9770 4) Let H = (H + H') modulo M. Repeat at Step 3.
9772 Because M > N and H' and M are relatively prime, the search is guaranteed
9773 to stop at an unused slot or find the match. */
9775 /* Create a hash table to map DWO IDs to their CU/TU entry in
9776 .debug_{info,types}.dwo in DWP_FILE.
9777 Returns NULL if there isn't one.
9778 Note: This function processes DWP files only, not DWO files. */
9780 static struct dwp_hash_table
*
9781 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9783 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9784 bfd
*dbfd
= dwp_file
->dbfd
;
9785 const gdb_byte
*index_ptr
, *index_end
;
9786 struct dwarf2_section_info
*index
;
9787 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9788 struct dwp_hash_table
*htab
;
9791 index
= &dwp_file
->sections
.tu_index
;
9793 index
= &dwp_file
->sections
.cu_index
;
9795 if (dwarf2_section_empty_p (index
))
9797 dwarf2_read_section (objfile
, index
);
9799 index_ptr
= index
->buffer
;
9800 index_end
= index_ptr
+ index
->size
;
9802 version
= read_4_bytes (dbfd
, index_ptr
);
9805 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9809 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9811 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9814 if (version
!= 1 && version
!= 2)
9816 error (_("Dwarf Error: unsupported DWP file version (%s)"
9818 pulongest (version
), dwp_file
->name
);
9820 if (nr_slots
!= (nr_slots
& -nr_slots
))
9822 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9823 " is not power of 2 [in module %s]"),
9824 pulongest (nr_slots
), dwp_file
->name
);
9827 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9828 htab
->version
= version
;
9829 htab
->nr_columns
= nr_columns
;
9830 htab
->nr_units
= nr_units
;
9831 htab
->nr_slots
= nr_slots
;
9832 htab
->hash_table
= index_ptr
;
9833 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9835 /* Exit early if the table is empty. */
9836 if (nr_slots
== 0 || nr_units
== 0
9837 || (version
== 2 && nr_columns
== 0))
9839 /* All must be zero. */
9840 if (nr_slots
!= 0 || nr_units
!= 0
9841 || (version
== 2 && nr_columns
!= 0))
9843 complaint (&symfile_complaints
,
9844 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9845 " all zero [in modules %s]"),
9853 htab
->section_pool
.v1
.indices
=
9854 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9855 /* It's harder to decide whether the section is too small in v1.
9856 V1 is deprecated anyway so we punt. */
9860 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9861 int *ids
= htab
->section_pool
.v2
.section_ids
;
9862 /* Reverse map for error checking. */
9863 int ids_seen
[DW_SECT_MAX
+ 1];
9868 error (_("Dwarf Error: bad DWP hash table, too few columns"
9869 " in section table [in module %s]"),
9872 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9874 error (_("Dwarf Error: bad DWP hash table, too many columns"
9875 " in section table [in module %s]"),
9878 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9879 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9880 for (i
= 0; i
< nr_columns
; ++i
)
9882 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9884 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9886 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9887 " in section table [in module %s]"),
9888 id
, dwp_file
->name
);
9890 if (ids_seen
[id
] != -1)
9892 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9893 " id %d in section table [in module %s]"),
9894 id
, dwp_file
->name
);
9899 /* Must have exactly one info or types section. */
9900 if (((ids_seen
[DW_SECT_INFO
] != -1)
9901 + (ids_seen
[DW_SECT_TYPES
] != -1))
9904 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9905 " DWO info/types section [in module %s]"),
9908 /* Must have an abbrev section. */
9909 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9911 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9912 " section [in module %s]"),
9915 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9916 htab
->section_pool
.v2
.sizes
=
9917 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9918 * nr_units
* nr_columns
);
9919 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9920 * nr_units
* nr_columns
))
9923 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9932 /* Update SECTIONS with the data from SECTP.
9934 This function is like the other "locate" section routines that are
9935 passed to bfd_map_over_sections, but in this context the sections to
9936 read comes from the DWP V1 hash table, not the full ELF section table.
9938 The result is non-zero for success, or zero if an error was found. */
9941 locate_v1_virtual_dwo_sections (asection
*sectp
,
9942 struct virtual_v1_dwo_sections
*sections
)
9944 const struct dwop_section_names
*names
= &dwop_section_names
;
9946 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9948 /* There can be only one. */
9949 if (sections
->abbrev
.s
.asection
!= NULL
)
9951 sections
->abbrev
.s
.asection
= sectp
;
9952 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9954 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9955 || section_is_p (sectp
->name
, &names
->types_dwo
))
9957 /* There can be only one. */
9958 if (sections
->info_or_types
.s
.asection
!= NULL
)
9960 sections
->info_or_types
.s
.asection
= sectp
;
9961 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9963 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9965 /* There can be only one. */
9966 if (sections
->line
.s
.asection
!= NULL
)
9968 sections
->line
.s
.asection
= sectp
;
9969 sections
->line
.size
= bfd_get_section_size (sectp
);
9971 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9973 /* There can be only one. */
9974 if (sections
->loc
.s
.asection
!= NULL
)
9976 sections
->loc
.s
.asection
= sectp
;
9977 sections
->loc
.size
= bfd_get_section_size (sectp
);
9979 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9981 /* There can be only one. */
9982 if (sections
->macinfo
.s
.asection
!= NULL
)
9984 sections
->macinfo
.s
.asection
= sectp
;
9985 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9987 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9989 /* There can be only one. */
9990 if (sections
->macro
.s
.asection
!= NULL
)
9992 sections
->macro
.s
.asection
= sectp
;
9993 sections
->macro
.size
= bfd_get_section_size (sectp
);
9995 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9997 /* There can be only one. */
9998 if (sections
->str_offsets
.s
.asection
!= NULL
)
10000 sections
->str_offsets
.s
.asection
= sectp
;
10001 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10005 /* No other kind of section is valid. */
10012 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10013 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10014 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10015 This is for DWP version 1 files. */
10017 static struct dwo_unit
*
10018 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10019 uint32_t unit_index
,
10020 const char *comp_dir
,
10021 ULONGEST signature
, int is_debug_types
)
10023 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10024 const struct dwp_hash_table
*dwp_htab
=
10025 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10026 bfd
*dbfd
= dwp_file
->dbfd
;
10027 const char *kind
= is_debug_types
? "TU" : "CU";
10028 struct dwo_file
*dwo_file
;
10029 struct dwo_unit
*dwo_unit
;
10030 struct virtual_v1_dwo_sections sections
;
10031 void **dwo_file_slot
;
10032 char *virtual_dwo_name
;
10033 struct dwarf2_section_info
*cutu
;
10034 struct cleanup
*cleanups
;
10037 gdb_assert (dwp_file
->version
== 1);
10039 if (dwarf_read_debug
)
10041 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10043 pulongest (unit_index
), hex_string (signature
),
10047 /* Fetch the sections of this DWO unit.
10048 Put a limit on the number of sections we look for so that bad data
10049 doesn't cause us to loop forever. */
10051 #define MAX_NR_V1_DWO_SECTIONS \
10052 (1 /* .debug_info or .debug_types */ \
10053 + 1 /* .debug_abbrev */ \
10054 + 1 /* .debug_line */ \
10055 + 1 /* .debug_loc */ \
10056 + 1 /* .debug_str_offsets */ \
10057 + 1 /* .debug_macro or .debug_macinfo */ \
10058 + 1 /* trailing zero */)
10060 memset (§ions
, 0, sizeof (sections
));
10061 cleanups
= make_cleanup (null_cleanup
, 0);
10063 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10066 uint32_t section_nr
=
10067 read_4_bytes (dbfd
,
10068 dwp_htab
->section_pool
.v1
.indices
10069 + (unit_index
+ i
) * sizeof (uint32_t));
10071 if (section_nr
== 0)
10073 if (section_nr
>= dwp_file
->num_sections
)
10075 error (_("Dwarf Error: bad DWP hash table, section number too large"
10076 " [in module %s]"),
10080 sectp
= dwp_file
->elf_sections
[section_nr
];
10081 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10083 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10084 " [in module %s]"),
10090 || dwarf2_section_empty_p (§ions
.info_or_types
)
10091 || dwarf2_section_empty_p (§ions
.abbrev
))
10093 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10094 " [in module %s]"),
10097 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10099 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10100 " [in module %s]"),
10104 /* It's easier for the rest of the code if we fake a struct dwo_file and
10105 have dwo_unit "live" in that. At least for now.
10107 The DWP file can be made up of a random collection of CUs and TUs.
10108 However, for each CU + set of TUs that came from the same original DWO
10109 file, we can combine them back into a virtual DWO file to save space
10110 (fewer struct dwo_file objects to allocate). Remember that for really
10111 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10114 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10115 get_section_id (§ions
.abbrev
),
10116 get_section_id (§ions
.line
),
10117 get_section_id (§ions
.loc
),
10118 get_section_id (§ions
.str_offsets
));
10119 make_cleanup (xfree
, virtual_dwo_name
);
10120 /* Can we use an existing virtual DWO file? */
10121 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10122 /* Create one if necessary. */
10123 if (*dwo_file_slot
== NULL
)
10125 if (dwarf_read_debug
)
10127 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10130 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10131 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10133 strlen (virtual_dwo_name
));
10134 dwo_file
->comp_dir
= comp_dir
;
10135 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10136 dwo_file
->sections
.line
= sections
.line
;
10137 dwo_file
->sections
.loc
= sections
.loc
;
10138 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10139 dwo_file
->sections
.macro
= sections
.macro
;
10140 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10141 /* The "str" section is global to the entire DWP file. */
10142 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10143 /* The info or types section is assigned below to dwo_unit,
10144 there's no need to record it in dwo_file.
10145 Also, we can't simply record type sections in dwo_file because
10146 we record a pointer into the vector in dwo_unit. As we collect more
10147 types we'll grow the vector and eventually have to reallocate space
10148 for it, invalidating all copies of pointers into the previous
10150 *dwo_file_slot
= dwo_file
;
10154 if (dwarf_read_debug
)
10156 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10159 dwo_file
= *dwo_file_slot
;
10161 do_cleanups (cleanups
);
10163 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10164 dwo_unit
->dwo_file
= dwo_file
;
10165 dwo_unit
->signature
= signature
;
10166 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10167 sizeof (struct dwarf2_section_info
));
10168 *dwo_unit
->section
= sections
.info_or_types
;
10169 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10174 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10175 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10176 piece within that section used by a TU/CU, return a virtual section
10177 of just that piece. */
10179 static struct dwarf2_section_info
10180 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10181 bfd_size_type offset
, bfd_size_type size
)
10183 struct dwarf2_section_info result
;
10186 gdb_assert (section
!= NULL
);
10187 gdb_assert (!section
->is_virtual
);
10189 memset (&result
, 0, sizeof (result
));
10190 result
.s
.containing_section
= section
;
10191 result
.is_virtual
= 1;
10196 sectp
= get_section_bfd_section (section
);
10198 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10199 bounds of the real section. This is a pretty-rare event, so just
10200 flag an error (easier) instead of a warning and trying to cope. */
10202 || offset
+ size
> bfd_get_section_size (sectp
))
10204 bfd
*abfd
= sectp
->owner
;
10206 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10207 " in section %s [in module %s]"),
10208 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10209 objfile_name (dwarf2_per_objfile
->objfile
));
10212 result
.virtual_offset
= offset
;
10213 result
.size
= size
;
10217 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10218 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10219 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10220 This is for DWP version 2 files. */
10222 static struct dwo_unit
*
10223 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10224 uint32_t unit_index
,
10225 const char *comp_dir
,
10226 ULONGEST signature
, int is_debug_types
)
10228 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10229 const struct dwp_hash_table
*dwp_htab
=
10230 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10231 bfd
*dbfd
= dwp_file
->dbfd
;
10232 const char *kind
= is_debug_types
? "TU" : "CU";
10233 struct dwo_file
*dwo_file
;
10234 struct dwo_unit
*dwo_unit
;
10235 struct virtual_v2_dwo_sections sections
;
10236 void **dwo_file_slot
;
10237 char *virtual_dwo_name
;
10238 struct dwarf2_section_info
*cutu
;
10239 struct cleanup
*cleanups
;
10242 gdb_assert (dwp_file
->version
== 2);
10244 if (dwarf_read_debug
)
10246 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10248 pulongest (unit_index
), hex_string (signature
),
10252 /* Fetch the section offsets of this DWO unit. */
10254 memset (§ions
, 0, sizeof (sections
));
10255 cleanups
= make_cleanup (null_cleanup
, 0);
10257 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10259 uint32_t offset
= read_4_bytes (dbfd
,
10260 dwp_htab
->section_pool
.v2
.offsets
10261 + (((unit_index
- 1) * dwp_htab
->nr_columns
10263 * sizeof (uint32_t)));
10264 uint32_t size
= read_4_bytes (dbfd
,
10265 dwp_htab
->section_pool
.v2
.sizes
10266 + (((unit_index
- 1) * dwp_htab
->nr_columns
10268 * sizeof (uint32_t)));
10270 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10273 case DW_SECT_TYPES
:
10274 sections
.info_or_types_offset
= offset
;
10275 sections
.info_or_types_size
= size
;
10277 case DW_SECT_ABBREV
:
10278 sections
.abbrev_offset
= offset
;
10279 sections
.abbrev_size
= size
;
10282 sections
.line_offset
= offset
;
10283 sections
.line_size
= size
;
10286 sections
.loc_offset
= offset
;
10287 sections
.loc_size
= size
;
10289 case DW_SECT_STR_OFFSETS
:
10290 sections
.str_offsets_offset
= offset
;
10291 sections
.str_offsets_size
= size
;
10293 case DW_SECT_MACINFO
:
10294 sections
.macinfo_offset
= offset
;
10295 sections
.macinfo_size
= size
;
10297 case DW_SECT_MACRO
:
10298 sections
.macro_offset
= offset
;
10299 sections
.macro_size
= size
;
10304 /* It's easier for the rest of the code if we fake a struct dwo_file and
10305 have dwo_unit "live" in that. At least for now.
10307 The DWP file can be made up of a random collection of CUs and TUs.
10308 However, for each CU + set of TUs that came from the same original DWO
10309 file, we can combine them back into a virtual DWO file to save space
10310 (fewer struct dwo_file objects to allocate). Remember that for really
10311 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10314 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10315 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10316 (long) (sections
.line_size
? sections
.line_offset
: 0),
10317 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10318 (long) (sections
.str_offsets_size
10319 ? sections
.str_offsets_offset
: 0));
10320 make_cleanup (xfree
, virtual_dwo_name
);
10321 /* Can we use an existing virtual DWO file? */
10322 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10323 /* Create one if necessary. */
10324 if (*dwo_file_slot
== NULL
)
10326 if (dwarf_read_debug
)
10328 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10331 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10332 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10334 strlen (virtual_dwo_name
));
10335 dwo_file
->comp_dir
= comp_dir
;
10336 dwo_file
->sections
.abbrev
=
10337 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10338 sections
.abbrev_offset
, sections
.abbrev_size
);
10339 dwo_file
->sections
.line
=
10340 create_dwp_v2_section (&dwp_file
->sections
.line
,
10341 sections
.line_offset
, sections
.line_size
);
10342 dwo_file
->sections
.loc
=
10343 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10344 sections
.loc_offset
, sections
.loc_size
);
10345 dwo_file
->sections
.macinfo
=
10346 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10347 sections
.macinfo_offset
, sections
.macinfo_size
);
10348 dwo_file
->sections
.macro
=
10349 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10350 sections
.macro_offset
, sections
.macro_size
);
10351 dwo_file
->sections
.str_offsets
=
10352 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10353 sections
.str_offsets_offset
,
10354 sections
.str_offsets_size
);
10355 /* The "str" section is global to the entire DWP file. */
10356 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10357 /* The info or types section is assigned below to dwo_unit,
10358 there's no need to record it in dwo_file.
10359 Also, we can't simply record type sections in dwo_file because
10360 we record a pointer into the vector in dwo_unit. As we collect more
10361 types we'll grow the vector and eventually have to reallocate space
10362 for it, invalidating all copies of pointers into the previous
10364 *dwo_file_slot
= dwo_file
;
10368 if (dwarf_read_debug
)
10370 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10373 dwo_file
= *dwo_file_slot
;
10375 do_cleanups (cleanups
);
10377 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10378 dwo_unit
->dwo_file
= dwo_file
;
10379 dwo_unit
->signature
= signature
;
10380 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10381 sizeof (struct dwarf2_section_info
));
10382 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10383 ? &dwp_file
->sections
.types
10384 : &dwp_file
->sections
.info
,
10385 sections
.info_or_types_offset
,
10386 sections
.info_or_types_size
);
10387 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10392 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10393 Returns NULL if the signature isn't found. */
10395 static struct dwo_unit
*
10396 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10397 ULONGEST signature
, int is_debug_types
)
10399 const struct dwp_hash_table
*dwp_htab
=
10400 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10401 bfd
*dbfd
= dwp_file
->dbfd
;
10402 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10403 uint32_t hash
= signature
& mask
;
10404 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10407 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10409 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10410 find_dwo_cu
.signature
= signature
;
10411 slot
= htab_find_slot (is_debug_types
10412 ? dwp_file
->loaded_tus
10413 : dwp_file
->loaded_cus
,
10414 &find_dwo_cu
, INSERT
);
10419 /* Use a for loop so that we don't loop forever on bad debug info. */
10420 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10422 ULONGEST signature_in_table
;
10424 signature_in_table
=
10425 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10426 if (signature_in_table
== signature
)
10428 uint32_t unit_index
=
10429 read_4_bytes (dbfd
,
10430 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10432 if (dwp_file
->version
== 1)
10434 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10435 comp_dir
, signature
,
10440 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10441 comp_dir
, signature
,
10446 if (signature_in_table
== 0)
10448 hash
= (hash
+ hash2
) & mask
;
10451 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10452 " [in module %s]"),
10456 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10457 Open the file specified by FILE_NAME and hand it off to BFD for
10458 preliminary analysis. Return a newly initialized bfd *, which
10459 includes a canonicalized copy of FILE_NAME.
10460 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10461 SEARCH_CWD is true if the current directory is to be searched.
10462 It will be searched before debug-file-directory.
10463 If successful, the file is added to the bfd include table of the
10464 objfile's bfd (see gdb_bfd_record_inclusion).
10465 If unable to find/open the file, return NULL.
10466 NOTE: This function is derived from symfile_bfd_open. */
10469 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10473 char *absolute_name
;
10474 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10475 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10476 to debug_file_directory. */
10478 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10482 if (*debug_file_directory
!= '\0')
10483 search_path
= concat (".", dirname_separator_string
,
10484 debug_file_directory
, NULL
);
10486 search_path
= xstrdup (".");
10489 search_path
= xstrdup (debug_file_directory
);
10491 flags
= OPF_RETURN_REALPATH
;
10493 flags
|= OPF_SEARCH_IN_PATH
;
10494 desc
= openp (search_path
, flags
, file_name
,
10495 O_RDONLY
| O_BINARY
, &absolute_name
);
10496 xfree (search_path
);
10500 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10501 xfree (absolute_name
);
10502 if (sym_bfd
== NULL
)
10504 bfd_set_cacheable (sym_bfd
, 1);
10506 if (!bfd_check_format (sym_bfd
, bfd_object
))
10508 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10512 /* Success. Record the bfd as having been included by the objfile's bfd.
10513 This is important because things like demangled_names_hash lives in the
10514 objfile's per_bfd space and may have references to things like symbol
10515 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10516 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10521 /* Try to open DWO file FILE_NAME.
10522 COMP_DIR is the DW_AT_comp_dir attribute.
10523 The result is the bfd handle of the file.
10524 If there is a problem finding or opening the file, return NULL.
10525 Upon success, the canonicalized path of the file is stored in the bfd,
10526 same as symfile_bfd_open. */
10529 open_dwo_file (const char *file_name
, const char *comp_dir
)
10533 if (IS_ABSOLUTE_PATH (file_name
))
10534 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10536 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10538 if (comp_dir
!= NULL
)
10540 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10542 /* NOTE: If comp_dir is a relative path, this will also try the
10543 search path, which seems useful. */
10544 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10545 xfree (path_to_try
);
10550 /* That didn't work, try debug-file-directory, which, despite its name,
10551 is a list of paths. */
10553 if (*debug_file_directory
== '\0')
10556 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10559 /* This function is mapped across the sections and remembers the offset and
10560 size of each of the DWO debugging sections we are interested in. */
10563 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10565 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10566 const struct dwop_section_names
*names
= &dwop_section_names
;
10568 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10570 dwo_sections
->abbrev
.s
.asection
= sectp
;
10571 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10573 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10575 dwo_sections
->info
.s
.asection
= sectp
;
10576 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10578 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10580 dwo_sections
->line
.s
.asection
= sectp
;
10581 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10583 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10585 dwo_sections
->loc
.s
.asection
= sectp
;
10586 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10588 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10590 dwo_sections
->macinfo
.s
.asection
= sectp
;
10591 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10593 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10595 dwo_sections
->macro
.s
.asection
= sectp
;
10596 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10598 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10600 dwo_sections
->str
.s
.asection
= sectp
;
10601 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10603 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10605 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10606 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10608 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10610 struct dwarf2_section_info type_section
;
10612 memset (&type_section
, 0, sizeof (type_section
));
10613 type_section
.s
.asection
= sectp
;
10614 type_section
.size
= bfd_get_section_size (sectp
);
10615 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10620 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10621 by PER_CU. This is for the non-DWP case.
10622 The result is NULL if DWO_NAME can't be found. */
10624 static struct dwo_file
*
10625 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10626 const char *dwo_name
, const char *comp_dir
)
10628 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10629 struct dwo_file
*dwo_file
;
10631 struct cleanup
*cleanups
;
10633 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10636 if (dwarf_read_debug
)
10637 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10640 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10641 dwo_file
->dwo_name
= dwo_name
;
10642 dwo_file
->comp_dir
= comp_dir
;
10643 dwo_file
->dbfd
= dbfd
;
10645 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10647 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10649 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10651 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10652 dwo_file
->sections
.types
);
10654 discard_cleanups (cleanups
);
10656 if (dwarf_read_debug
)
10657 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10662 /* This function is mapped across the sections and remembers the offset and
10663 size of each of the DWP debugging sections common to version 1 and 2 that
10664 we are interested in. */
10667 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10668 void *dwp_file_ptr
)
10670 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10671 const struct dwop_section_names
*names
= &dwop_section_names
;
10672 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10674 /* Record the ELF section number for later lookup: this is what the
10675 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10676 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10677 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10679 /* Look for specific sections that we need. */
10680 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10682 dwp_file
->sections
.str
.s
.asection
= sectp
;
10683 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10685 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10687 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10688 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10690 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10692 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10693 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10697 /* This function is mapped across the sections and remembers the offset and
10698 size of each of the DWP version 2 debugging sections that we are interested
10699 in. This is split into a separate function because we don't know if we
10700 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10703 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10705 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10706 const struct dwop_section_names
*names
= &dwop_section_names
;
10707 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10709 /* Record the ELF section number for later lookup: this is what the
10710 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10711 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10712 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10714 /* Look for specific sections that we need. */
10715 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10717 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10718 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10720 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10722 dwp_file
->sections
.info
.s
.asection
= sectp
;
10723 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10725 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10727 dwp_file
->sections
.line
.s
.asection
= sectp
;
10728 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10730 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10732 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10733 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10735 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10737 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10738 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10740 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10742 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10743 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10745 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10747 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10748 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10750 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10752 dwp_file
->sections
.types
.s
.asection
= sectp
;
10753 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10757 /* Hash function for dwp_file loaded CUs/TUs. */
10760 hash_dwp_loaded_cutus (const void *item
)
10762 const struct dwo_unit
*dwo_unit
= item
;
10764 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10765 return dwo_unit
->signature
;
10768 /* Equality function for dwp_file loaded CUs/TUs. */
10771 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10773 const struct dwo_unit
*dua
= a
;
10774 const struct dwo_unit
*dub
= b
;
10776 return dua
->signature
== dub
->signature
;
10779 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10782 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10784 return htab_create_alloc_ex (3,
10785 hash_dwp_loaded_cutus
,
10786 eq_dwp_loaded_cutus
,
10788 &objfile
->objfile_obstack
,
10789 hashtab_obstack_allocate
,
10790 dummy_obstack_deallocate
);
10793 /* Try to open DWP file FILE_NAME.
10794 The result is the bfd handle of the file.
10795 If there is a problem finding or opening the file, return NULL.
10796 Upon success, the canonicalized path of the file is stored in the bfd,
10797 same as symfile_bfd_open. */
10800 open_dwp_file (const char *file_name
)
10804 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10808 /* Work around upstream bug 15652.
10809 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10810 [Whether that's a "bug" is debatable, but it is getting in our way.]
10811 We have no real idea where the dwp file is, because gdb's realpath-ing
10812 of the executable's path may have discarded the needed info.
10813 [IWBN if the dwp file name was recorded in the executable, akin to
10814 .gnu_debuglink, but that doesn't exist yet.]
10815 Strip the directory from FILE_NAME and search again. */
10816 if (*debug_file_directory
!= '\0')
10818 /* Don't implicitly search the current directory here.
10819 If the user wants to search "." to handle this case,
10820 it must be added to debug-file-directory. */
10821 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10828 /* Initialize the use of the DWP file for the current objfile.
10829 By convention the name of the DWP file is ${objfile}.dwp.
10830 The result is NULL if it can't be found. */
10832 static struct dwp_file
*
10833 open_and_init_dwp_file (void)
10835 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10836 struct dwp_file
*dwp_file
;
10839 struct cleanup
*cleanups
;
10841 /* Try to find first .dwp for the binary file before any symbolic links
10843 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10844 cleanups
= make_cleanup (xfree
, dwp_name
);
10846 dbfd
= open_dwp_file (dwp_name
);
10848 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10850 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10851 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10852 make_cleanup (xfree
, dwp_name
);
10853 dbfd
= open_dwp_file (dwp_name
);
10858 if (dwarf_read_debug
)
10859 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10860 do_cleanups (cleanups
);
10863 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10864 dwp_file
->name
= bfd_get_filename (dbfd
);
10865 dwp_file
->dbfd
= dbfd
;
10866 do_cleanups (cleanups
);
10868 /* +1: section 0 is unused */
10869 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10870 dwp_file
->elf_sections
=
10871 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10872 dwp_file
->num_sections
, asection
*);
10874 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10876 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10878 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10880 /* The DWP file version is stored in the hash table. Oh well. */
10881 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10883 /* Technically speaking, we should try to limp along, but this is
10884 pretty bizarre. We use pulongest here because that's the established
10885 portability solution (e.g, we cannot use %u for uint32_t). */
10886 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10887 " TU version %s [in DWP file %s]"),
10888 pulongest (dwp_file
->cus
->version
),
10889 pulongest (dwp_file
->tus
->version
), dwp_name
);
10891 dwp_file
->version
= dwp_file
->cus
->version
;
10893 if (dwp_file
->version
== 2)
10894 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10896 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10897 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10899 if (dwarf_read_debug
)
10901 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10902 fprintf_unfiltered (gdb_stdlog
,
10903 " %s CUs, %s TUs\n",
10904 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10905 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10911 /* Wrapper around open_and_init_dwp_file, only open it once. */
10913 static struct dwp_file
*
10914 get_dwp_file (void)
10916 if (! dwarf2_per_objfile
->dwp_checked
)
10918 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10919 dwarf2_per_objfile
->dwp_checked
= 1;
10921 return dwarf2_per_objfile
->dwp_file
;
10924 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10925 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10926 or in the DWP file for the objfile, referenced by THIS_UNIT.
10927 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10928 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10930 This is called, for example, when wanting to read a variable with a
10931 complex location. Therefore we don't want to do file i/o for every call.
10932 Therefore we don't want to look for a DWO file on every call.
10933 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10934 then we check if we've already seen DWO_NAME, and only THEN do we check
10937 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10938 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10940 static struct dwo_unit
*
10941 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10942 const char *dwo_name
, const char *comp_dir
,
10943 ULONGEST signature
, int is_debug_types
)
10945 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10946 const char *kind
= is_debug_types
? "TU" : "CU";
10947 void **dwo_file_slot
;
10948 struct dwo_file
*dwo_file
;
10949 struct dwp_file
*dwp_file
;
10951 /* First see if there's a DWP file.
10952 If we have a DWP file but didn't find the DWO inside it, don't
10953 look for the original DWO file. It makes gdb behave differently
10954 depending on whether one is debugging in the build tree. */
10956 dwp_file
= get_dwp_file ();
10957 if (dwp_file
!= NULL
)
10959 const struct dwp_hash_table
*dwp_htab
=
10960 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10962 if (dwp_htab
!= NULL
)
10964 struct dwo_unit
*dwo_cutu
=
10965 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10966 signature
, is_debug_types
);
10968 if (dwo_cutu
!= NULL
)
10970 if (dwarf_read_debug
)
10972 fprintf_unfiltered (gdb_stdlog
,
10973 "Virtual DWO %s %s found: @%s\n",
10974 kind
, hex_string (signature
),
10975 host_address_to_string (dwo_cutu
));
10983 /* No DWP file, look for the DWO file. */
10985 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10986 if (*dwo_file_slot
== NULL
)
10988 /* Read in the file and build a table of the CUs/TUs it contains. */
10989 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10991 /* NOTE: This will be NULL if unable to open the file. */
10992 dwo_file
= *dwo_file_slot
;
10994 if (dwo_file
!= NULL
)
10996 struct dwo_unit
*dwo_cutu
= NULL
;
10998 if (is_debug_types
&& dwo_file
->tus
)
11000 struct dwo_unit find_dwo_cutu
;
11002 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11003 find_dwo_cutu
.signature
= signature
;
11004 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11006 else if (!is_debug_types
&& dwo_file
->cu
)
11008 if (signature
== dwo_file
->cu
->signature
)
11009 dwo_cutu
= dwo_file
->cu
;
11012 if (dwo_cutu
!= NULL
)
11014 if (dwarf_read_debug
)
11016 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11017 kind
, dwo_name
, hex_string (signature
),
11018 host_address_to_string (dwo_cutu
));
11025 /* We didn't find it. This could mean a dwo_id mismatch, or
11026 someone deleted the DWO/DWP file, or the search path isn't set up
11027 correctly to find the file. */
11029 if (dwarf_read_debug
)
11031 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11032 kind
, dwo_name
, hex_string (signature
));
11035 /* This is a warning and not a complaint because it can be caused by
11036 pilot error (e.g., user accidentally deleting the DWO). */
11038 /* Print the name of the DWP file if we looked there, helps the user
11039 better diagnose the problem. */
11040 char *dwp_text
= NULL
;
11041 struct cleanup
*cleanups
;
11043 if (dwp_file
!= NULL
)
11044 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11045 cleanups
= make_cleanup (xfree
, dwp_text
);
11047 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11048 " [in module %s]"),
11049 kind
, dwo_name
, hex_string (signature
),
11050 dwp_text
!= NULL
? dwp_text
: "",
11051 this_unit
->is_debug_types
? "TU" : "CU",
11052 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11054 do_cleanups (cleanups
);
11059 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11060 See lookup_dwo_cutu_unit for details. */
11062 static struct dwo_unit
*
11063 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11064 const char *dwo_name
, const char *comp_dir
,
11065 ULONGEST signature
)
11067 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11070 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11071 See lookup_dwo_cutu_unit for details. */
11073 static struct dwo_unit
*
11074 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11075 const char *dwo_name
, const char *comp_dir
)
11077 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11080 /* Traversal function for queue_and_load_all_dwo_tus. */
11083 queue_and_load_dwo_tu (void **slot
, void *info
)
11085 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11086 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11087 ULONGEST signature
= dwo_unit
->signature
;
11088 struct signatured_type
*sig_type
=
11089 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11091 if (sig_type
!= NULL
)
11093 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11095 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11096 a real dependency of PER_CU on SIG_TYPE. That is detected later
11097 while processing PER_CU. */
11098 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11099 load_full_type_unit (sig_cu
);
11100 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11106 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11107 The DWO may have the only definition of the type, though it may not be
11108 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11109 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11112 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11114 struct dwo_unit
*dwo_unit
;
11115 struct dwo_file
*dwo_file
;
11117 gdb_assert (!per_cu
->is_debug_types
);
11118 gdb_assert (get_dwp_file () == NULL
);
11119 gdb_assert (per_cu
->cu
!= NULL
);
11121 dwo_unit
= per_cu
->cu
->dwo_unit
;
11122 gdb_assert (dwo_unit
!= NULL
);
11124 dwo_file
= dwo_unit
->dwo_file
;
11125 if (dwo_file
->tus
!= NULL
)
11126 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11129 /* Free all resources associated with DWO_FILE.
11130 Close the DWO file and munmap the sections.
11131 All memory should be on the objfile obstack. */
11134 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11137 struct dwarf2_section_info
*section
;
11139 /* Note: dbfd is NULL for virtual DWO files. */
11140 gdb_bfd_unref (dwo_file
->dbfd
);
11142 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11145 /* Wrapper for free_dwo_file for use in cleanups. */
11148 free_dwo_file_cleanup (void *arg
)
11150 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11151 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11153 free_dwo_file (dwo_file
, objfile
);
11156 /* Traversal function for free_dwo_files. */
11159 free_dwo_file_from_slot (void **slot
, void *info
)
11161 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11162 struct objfile
*objfile
= (struct objfile
*) info
;
11164 free_dwo_file (dwo_file
, objfile
);
11169 /* Free all resources associated with DWO_FILES. */
11172 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11174 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11177 /* Read in various DIEs. */
11179 /* qsort helper for inherit_abstract_dies. */
11182 unsigned_int_compar (const void *ap
, const void *bp
)
11184 unsigned int a
= *(unsigned int *) ap
;
11185 unsigned int b
= *(unsigned int *) bp
;
11187 return (a
> b
) - (b
> a
);
11190 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11191 Inherit only the children of the DW_AT_abstract_origin DIE not being
11192 already referenced by DW_AT_abstract_origin from the children of the
11196 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11198 struct die_info
*child_die
;
11199 unsigned die_children_count
;
11200 /* CU offsets which were referenced by children of the current DIE. */
11201 sect_offset
*offsets
;
11202 sect_offset
*offsets_end
, *offsetp
;
11203 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11204 struct die_info
*origin_die
;
11205 /* Iterator of the ORIGIN_DIE children. */
11206 struct die_info
*origin_child_die
;
11207 struct cleanup
*cleanups
;
11208 struct attribute
*attr
;
11209 struct dwarf2_cu
*origin_cu
;
11210 struct pending
**origin_previous_list_in_scope
;
11212 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11216 /* Note that following die references may follow to a die in a
11220 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11222 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11224 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11225 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11227 if (die
->tag
!= origin_die
->tag
11228 && !(die
->tag
== DW_TAG_inlined_subroutine
11229 && origin_die
->tag
== DW_TAG_subprogram
))
11230 complaint (&symfile_complaints
,
11231 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11232 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11234 child_die
= die
->child
;
11235 die_children_count
= 0;
11236 while (child_die
&& child_die
->tag
)
11238 child_die
= sibling_die (child_die
);
11239 die_children_count
++;
11241 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11242 cleanups
= make_cleanup (xfree
, offsets
);
11244 offsets_end
= offsets
;
11245 for (child_die
= die
->child
;
11246 child_die
&& child_die
->tag
;
11247 child_die
= sibling_die (child_die
))
11249 struct die_info
*child_origin_die
;
11250 struct dwarf2_cu
*child_origin_cu
;
11252 /* We are trying to process concrete instance entries:
11253 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11254 it's not relevant to our analysis here. i.e. detecting DIEs that are
11255 present in the abstract instance but not referenced in the concrete
11257 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11260 /* For each CHILD_DIE, find the corresponding child of
11261 ORIGIN_DIE. If there is more than one layer of
11262 DW_AT_abstract_origin, follow them all; there shouldn't be,
11263 but GCC versions at least through 4.4 generate this (GCC PR
11265 child_origin_die
= child_die
;
11266 child_origin_cu
= cu
;
11269 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11273 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11277 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11278 counterpart may exist. */
11279 if (child_origin_die
!= child_die
)
11281 if (child_die
->tag
!= child_origin_die
->tag
11282 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11283 && child_origin_die
->tag
== DW_TAG_subprogram
))
11284 complaint (&symfile_complaints
,
11285 _("Child DIE 0x%x and its abstract origin 0x%x have "
11286 "different tags"), child_die
->offset
.sect_off
,
11287 child_origin_die
->offset
.sect_off
);
11288 if (child_origin_die
->parent
!= origin_die
)
11289 complaint (&symfile_complaints
,
11290 _("Child DIE 0x%x and its abstract origin 0x%x have "
11291 "different parents"), child_die
->offset
.sect_off
,
11292 child_origin_die
->offset
.sect_off
);
11294 *offsets_end
++ = child_origin_die
->offset
;
11297 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11298 unsigned_int_compar
);
11299 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11300 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11301 complaint (&symfile_complaints
,
11302 _("Multiple children of DIE 0x%x refer "
11303 "to DIE 0x%x as their abstract origin"),
11304 die
->offset
.sect_off
, offsetp
->sect_off
);
11307 origin_child_die
= origin_die
->child
;
11308 while (origin_child_die
&& origin_child_die
->tag
)
11310 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11311 while (offsetp
< offsets_end
11312 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11314 if (offsetp
>= offsets_end
11315 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11317 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11318 Check whether we're already processing ORIGIN_CHILD_DIE.
11319 This can happen with mutually referenced abstract_origins.
11321 if (!origin_child_die
->in_process
)
11322 process_die (origin_child_die
, origin_cu
);
11324 origin_child_die
= sibling_die (origin_child_die
);
11326 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11328 do_cleanups (cleanups
);
11332 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11334 struct objfile
*objfile
= cu
->objfile
;
11335 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11336 struct context_stack
*newobj
;
11339 struct die_info
*child_die
;
11340 struct attribute
*attr
, *call_line
, *call_file
;
11342 CORE_ADDR baseaddr
;
11343 struct block
*block
;
11344 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11345 VEC (symbolp
) *template_args
= NULL
;
11346 struct template_symbol
*templ_func
= NULL
;
11350 /* If we do not have call site information, we can't show the
11351 caller of this inlined function. That's too confusing, so
11352 only use the scope for local variables. */
11353 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11354 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11355 if (call_line
== NULL
|| call_file
== NULL
)
11357 read_lexical_block_scope (die
, cu
);
11362 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11364 name
= dwarf2_name (die
, cu
);
11366 /* Ignore functions with missing or empty names. These are actually
11367 illegal according to the DWARF standard. */
11370 complaint (&symfile_complaints
,
11371 _("missing name for subprogram DIE at %d"),
11372 die
->offset
.sect_off
);
11376 /* Ignore functions with missing or invalid low and high pc attributes. */
11377 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11379 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11380 if (!attr
|| !DW_UNSND (attr
))
11381 complaint (&symfile_complaints
,
11382 _("cannot get low and high bounds "
11383 "for subprogram DIE at %d"),
11384 die
->offset
.sect_off
);
11388 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11389 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11391 /* If we have any template arguments, then we must allocate a
11392 different sort of symbol. */
11393 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11395 if (child_die
->tag
== DW_TAG_template_type_param
11396 || child_die
->tag
== DW_TAG_template_value_param
)
11398 templ_func
= allocate_template_symbol (objfile
);
11399 templ_func
->base
.is_cplus_template_function
= 1;
11404 newobj
= push_context (0, lowpc
);
11405 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11406 (struct symbol
*) templ_func
);
11408 /* If there is a location expression for DW_AT_frame_base, record
11410 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11412 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11414 cu
->list_in_scope
= &local_symbols
;
11416 if (die
->child
!= NULL
)
11418 child_die
= die
->child
;
11419 while (child_die
&& child_die
->tag
)
11421 if (child_die
->tag
== DW_TAG_template_type_param
11422 || child_die
->tag
== DW_TAG_template_value_param
)
11424 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11427 VEC_safe_push (symbolp
, template_args
, arg
);
11430 process_die (child_die
, cu
);
11431 child_die
= sibling_die (child_die
);
11435 inherit_abstract_dies (die
, cu
);
11437 /* If we have a DW_AT_specification, we might need to import using
11438 directives from the context of the specification DIE. See the
11439 comment in determine_prefix. */
11440 if (cu
->language
== language_cplus
11441 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11443 struct dwarf2_cu
*spec_cu
= cu
;
11444 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11448 child_die
= spec_die
->child
;
11449 while (child_die
&& child_die
->tag
)
11451 if (child_die
->tag
== DW_TAG_imported_module
)
11452 process_die (child_die
, spec_cu
);
11453 child_die
= sibling_die (child_die
);
11456 /* In some cases, GCC generates specification DIEs that
11457 themselves contain DW_AT_specification attributes. */
11458 spec_die
= die_specification (spec_die
, &spec_cu
);
11462 newobj
= pop_context ();
11463 /* Make a block for the local symbols within. */
11464 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11467 /* For C++, set the block's scope. */
11468 if ((cu
->language
== language_cplus
11469 || cu
->language
== language_fortran
11470 || cu
->language
== language_d
)
11471 && cu
->processing_has_namespace_info
)
11472 block_set_scope (block
, determine_prefix (die
, cu
),
11473 &objfile
->objfile_obstack
);
11475 /* If we have address ranges, record them. */
11476 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11478 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11480 /* Attach template arguments to function. */
11481 if (! VEC_empty (symbolp
, template_args
))
11483 gdb_assert (templ_func
!= NULL
);
11485 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11486 templ_func
->template_arguments
11487 = obstack_alloc (&objfile
->objfile_obstack
,
11488 (templ_func
->n_template_arguments
11489 * sizeof (struct symbol
*)));
11490 memcpy (templ_func
->template_arguments
,
11491 VEC_address (symbolp
, template_args
),
11492 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11493 VEC_free (symbolp
, template_args
);
11496 /* In C++, we can have functions nested inside functions (e.g., when
11497 a function declares a class that has methods). This means that
11498 when we finish processing a function scope, we may need to go
11499 back to building a containing block's symbol lists. */
11500 local_symbols
= newobj
->locals
;
11501 local_using_directives
= newobj
->local_using_directives
;
11503 /* If we've finished processing a top-level function, subsequent
11504 symbols go in the file symbol list. */
11505 if (outermost_context_p ())
11506 cu
->list_in_scope
= &file_symbols
;
11509 /* Process all the DIES contained within a lexical block scope. Start
11510 a new scope, process the dies, and then close the scope. */
11513 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11515 struct objfile
*objfile
= cu
->objfile
;
11516 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11517 struct context_stack
*newobj
;
11518 CORE_ADDR lowpc
, highpc
;
11519 struct die_info
*child_die
;
11520 CORE_ADDR baseaddr
;
11522 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11524 /* Ignore blocks with missing or invalid low and high pc attributes. */
11525 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11526 as multiple lexical blocks? Handling children in a sane way would
11527 be nasty. Might be easier to properly extend generic blocks to
11528 describe ranges. */
11529 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11531 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11532 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11534 push_context (0, lowpc
);
11535 if (die
->child
!= NULL
)
11537 child_die
= die
->child
;
11538 while (child_die
&& child_die
->tag
)
11540 process_die (child_die
, cu
);
11541 child_die
= sibling_die (child_die
);
11544 inherit_abstract_dies (die
, cu
);
11545 newobj
= pop_context ();
11547 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11549 struct block
*block
11550 = finish_block (0, &local_symbols
, newobj
->old_blocks
,
11551 newobj
->start_addr
, highpc
);
11553 /* Note that recording ranges after traversing children, as we
11554 do here, means that recording a parent's ranges entails
11555 walking across all its children's ranges as they appear in
11556 the address map, which is quadratic behavior.
11558 It would be nicer to record the parent's ranges before
11559 traversing its children, simply overriding whatever you find
11560 there. But since we don't even decide whether to create a
11561 block until after we've traversed its children, that's hard
11563 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11565 local_symbols
= newobj
->locals
;
11566 local_using_directives
= newobj
->local_using_directives
;
11569 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11572 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11574 struct objfile
*objfile
= cu
->objfile
;
11575 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11576 CORE_ADDR pc
, baseaddr
;
11577 struct attribute
*attr
;
11578 struct call_site
*call_site
, call_site_local
;
11581 struct die_info
*child_die
;
11583 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11585 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11588 complaint (&symfile_complaints
,
11589 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11590 "DIE 0x%x [in module %s]"),
11591 die
->offset
.sect_off
, objfile_name (objfile
));
11594 pc
= attr_value_as_address (attr
) + baseaddr
;
11595 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11597 if (cu
->call_site_htab
== NULL
)
11598 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11599 NULL
, &objfile
->objfile_obstack
,
11600 hashtab_obstack_allocate
, NULL
);
11601 call_site_local
.pc
= pc
;
11602 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11605 complaint (&symfile_complaints
,
11606 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11607 "DIE 0x%x [in module %s]"),
11608 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11609 objfile_name (objfile
));
11613 /* Count parameters at the caller. */
11616 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11617 child_die
= sibling_die (child_die
))
11619 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11621 complaint (&symfile_complaints
,
11622 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11623 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11624 child_die
->tag
, child_die
->offset
.sect_off
,
11625 objfile_name (objfile
));
11632 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11633 (sizeof (*call_site
)
11634 + (sizeof (*call_site
->parameter
)
11635 * (nparams
- 1))));
11637 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11638 call_site
->pc
= pc
;
11640 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11642 struct die_info
*func_die
;
11644 /* Skip also over DW_TAG_inlined_subroutine. */
11645 for (func_die
= die
->parent
;
11646 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11647 && func_die
->tag
!= DW_TAG_subroutine_type
;
11648 func_die
= func_die
->parent
);
11650 /* DW_AT_GNU_all_call_sites is a superset
11651 of DW_AT_GNU_all_tail_call_sites. */
11653 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11654 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11656 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11657 not complete. But keep CALL_SITE for look ups via call_site_htab,
11658 both the initial caller containing the real return address PC and
11659 the final callee containing the current PC of a chain of tail
11660 calls do not need to have the tail call list complete. But any
11661 function candidate for a virtual tail call frame searched via
11662 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11663 determined unambiguously. */
11667 struct type
*func_type
= NULL
;
11670 func_type
= get_die_type (func_die
, cu
);
11671 if (func_type
!= NULL
)
11673 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11675 /* Enlist this call site to the function. */
11676 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11677 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11680 complaint (&symfile_complaints
,
11681 _("Cannot find function owning DW_TAG_GNU_call_site "
11682 "DIE 0x%x [in module %s]"),
11683 die
->offset
.sect_off
, objfile_name (objfile
));
11687 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11689 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11690 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11691 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11692 /* Keep NULL DWARF_BLOCK. */;
11693 else if (attr_form_is_block (attr
))
11695 struct dwarf2_locexpr_baton
*dlbaton
;
11697 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11698 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11699 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11700 dlbaton
->per_cu
= cu
->per_cu
;
11702 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11704 else if (attr_form_is_ref (attr
))
11706 struct dwarf2_cu
*target_cu
= cu
;
11707 struct die_info
*target_die
;
11709 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11710 gdb_assert (target_cu
->objfile
== objfile
);
11711 if (die_is_declaration (target_die
, target_cu
))
11713 const char *target_physname
= NULL
;
11714 struct attribute
*target_attr
;
11716 /* Prefer the mangled name; otherwise compute the demangled one. */
11717 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11718 if (target_attr
== NULL
)
11719 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11721 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11722 target_physname
= DW_STRING (target_attr
);
11724 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11725 if (target_physname
== NULL
)
11726 complaint (&symfile_complaints
,
11727 _("DW_AT_GNU_call_site_target target DIE has invalid "
11728 "physname, for referencing DIE 0x%x [in module %s]"),
11729 die
->offset
.sect_off
, objfile_name (objfile
));
11731 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11737 /* DW_AT_entry_pc should be preferred. */
11738 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11739 complaint (&symfile_complaints
,
11740 _("DW_AT_GNU_call_site_target target DIE has invalid "
11741 "low pc, for referencing DIE 0x%x [in module %s]"),
11742 die
->offset
.sect_off
, objfile_name (objfile
));
11745 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11746 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11751 complaint (&symfile_complaints
,
11752 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11753 "block nor reference, for DIE 0x%x [in module %s]"),
11754 die
->offset
.sect_off
, objfile_name (objfile
));
11756 call_site
->per_cu
= cu
->per_cu
;
11758 for (child_die
= die
->child
;
11759 child_die
&& child_die
->tag
;
11760 child_die
= sibling_die (child_die
))
11762 struct call_site_parameter
*parameter
;
11763 struct attribute
*loc
, *origin
;
11765 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11767 /* Already printed the complaint above. */
11771 gdb_assert (call_site
->parameter_count
< nparams
);
11772 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11774 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11775 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11776 register is contained in DW_AT_GNU_call_site_value. */
11778 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11779 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11780 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11782 sect_offset offset
;
11784 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11785 offset
= dwarf2_get_ref_die_offset (origin
);
11786 if (!offset_in_cu_p (&cu
->header
, offset
))
11788 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11789 binding can be done only inside one CU. Such referenced DIE
11790 therefore cannot be even moved to DW_TAG_partial_unit. */
11791 complaint (&symfile_complaints
,
11792 _("DW_AT_abstract_origin offset is not in CU for "
11793 "DW_TAG_GNU_call_site child DIE 0x%x "
11795 child_die
->offset
.sect_off
, objfile_name (objfile
));
11798 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11799 - cu
->header
.offset
.sect_off
);
11801 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11803 complaint (&symfile_complaints
,
11804 _("No DW_FORM_block* DW_AT_location for "
11805 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11806 child_die
->offset
.sect_off
, objfile_name (objfile
));
11811 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11812 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11813 if (parameter
->u
.dwarf_reg
!= -1)
11814 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11815 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11816 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11817 ¶meter
->u
.fb_offset
))
11818 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11821 complaint (&symfile_complaints
,
11822 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11823 "for DW_FORM_block* DW_AT_location is supported for "
11824 "DW_TAG_GNU_call_site child DIE 0x%x "
11826 child_die
->offset
.sect_off
, objfile_name (objfile
));
11831 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11832 if (!attr_form_is_block (attr
))
11834 complaint (&symfile_complaints
,
11835 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11836 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11837 child_die
->offset
.sect_off
, objfile_name (objfile
));
11840 parameter
->value
= DW_BLOCK (attr
)->data
;
11841 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11843 /* Parameters are not pre-cleared by memset above. */
11844 parameter
->data_value
= NULL
;
11845 parameter
->data_value_size
= 0;
11846 call_site
->parameter_count
++;
11848 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11851 if (!attr_form_is_block (attr
))
11852 complaint (&symfile_complaints
,
11853 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11854 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11855 child_die
->offset
.sect_off
, objfile_name (objfile
));
11858 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11859 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11865 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11866 Return 1 if the attributes are present and valid, otherwise, return 0.
11867 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11870 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11871 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11872 struct partial_symtab
*ranges_pst
)
11874 struct objfile
*objfile
= cu
->objfile
;
11875 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11876 struct comp_unit_head
*cu_header
= &cu
->header
;
11877 bfd
*obfd
= objfile
->obfd
;
11878 unsigned int addr_size
= cu_header
->addr_size
;
11879 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11880 /* Base address selection entry. */
11883 unsigned int dummy
;
11884 const gdb_byte
*buffer
;
11888 CORE_ADDR high
= 0;
11889 CORE_ADDR baseaddr
;
11891 found_base
= cu
->base_known
;
11892 base
= cu
->base_address
;
11894 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11895 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11897 complaint (&symfile_complaints
,
11898 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11902 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11904 /* Read in the largest possible address. */
11905 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11906 if ((marker
& mask
) == mask
)
11908 /* If we found the largest possible address, then
11909 read the base address. */
11910 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11911 buffer
+= 2 * addr_size
;
11912 offset
+= 2 * addr_size
;
11918 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11922 CORE_ADDR range_beginning
, range_end
;
11924 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11925 buffer
+= addr_size
;
11926 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11927 buffer
+= addr_size
;
11928 offset
+= 2 * addr_size
;
11930 /* An end of list marker is a pair of zero addresses. */
11931 if (range_beginning
== 0 && range_end
== 0)
11932 /* Found the end of list entry. */
11935 /* Each base address selection entry is a pair of 2 values.
11936 The first is the largest possible address, the second is
11937 the base address. Check for a base address here. */
11938 if ((range_beginning
& mask
) == mask
)
11940 /* If we found the largest possible address, then
11941 read the base address. */
11942 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11949 /* We have no valid base address for the ranges
11951 complaint (&symfile_complaints
,
11952 _("Invalid .debug_ranges data (no base address)"));
11956 if (range_beginning
> range_end
)
11958 /* Inverted range entries are invalid. */
11959 complaint (&symfile_complaints
,
11960 _("Invalid .debug_ranges data (inverted range)"));
11964 /* Empty range entries have no effect. */
11965 if (range_beginning
== range_end
)
11968 range_beginning
+= base
;
11971 /* A not-uncommon case of bad debug info.
11972 Don't pollute the addrmap with bad data. */
11973 if (range_beginning
+ baseaddr
== 0
11974 && !dwarf2_per_objfile
->has_section_at_zero
)
11976 complaint (&symfile_complaints
,
11977 _(".debug_ranges entry has start address of zero"
11978 " [in module %s]"), objfile_name (objfile
));
11982 if (ranges_pst
!= NULL
)
11987 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11988 range_beginning
+ baseaddr
);
11989 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11990 range_end
+ baseaddr
);
11991 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11995 /* FIXME: This is recording everything as a low-high
11996 segment of consecutive addresses. We should have a
11997 data structure for discontiguous block ranges
12001 low
= range_beginning
;
12007 if (range_beginning
< low
)
12008 low
= range_beginning
;
12009 if (range_end
> high
)
12015 /* If the first entry is an end-of-list marker, the range
12016 describes an empty scope, i.e. no instructions. */
12022 *high_return
= high
;
12026 /* Get low and high pc attributes from a die. Return 1 if the attributes
12027 are present and valid, otherwise, return 0. Return -1 if the range is
12028 discontinuous, i.e. derived from DW_AT_ranges information. */
12031 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12032 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12033 struct partial_symtab
*pst
)
12035 struct attribute
*attr
;
12036 struct attribute
*attr_high
;
12038 CORE_ADDR high
= 0;
12041 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12044 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12047 low
= attr_value_as_address (attr
);
12048 high
= attr_value_as_address (attr_high
);
12049 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12053 /* Found high w/o low attribute. */
12056 /* Found consecutive range of addresses. */
12061 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12064 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12065 We take advantage of the fact that DW_AT_ranges does not appear
12066 in DW_TAG_compile_unit of DWO files. */
12067 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12068 unsigned int ranges_offset
= (DW_UNSND (attr
)
12069 + (need_ranges_base
12073 /* Value of the DW_AT_ranges attribute is the offset in the
12074 .debug_ranges section. */
12075 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12077 /* Found discontinuous range of addresses. */
12082 /* read_partial_die has also the strict LOW < HIGH requirement. */
12086 /* When using the GNU linker, .gnu.linkonce. sections are used to
12087 eliminate duplicate copies of functions and vtables and such.
12088 The linker will arbitrarily choose one and discard the others.
12089 The AT_*_pc values for such functions refer to local labels in
12090 these sections. If the section from that file was discarded, the
12091 labels are not in the output, so the relocs get a value of 0.
12092 If this is a discarded function, mark the pc bounds as invalid,
12093 so that GDB will ignore it. */
12094 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12103 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12104 its low and high PC addresses. Do nothing if these addresses could not
12105 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12106 and HIGHPC to the high address if greater than HIGHPC. */
12109 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12110 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12111 struct dwarf2_cu
*cu
)
12113 CORE_ADDR low
, high
;
12114 struct die_info
*child
= die
->child
;
12116 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12118 *lowpc
= min (*lowpc
, low
);
12119 *highpc
= max (*highpc
, high
);
12122 /* If the language does not allow nested subprograms (either inside
12123 subprograms or lexical blocks), we're done. */
12124 if (cu
->language
!= language_ada
)
12127 /* Check all the children of the given DIE. If it contains nested
12128 subprograms, then check their pc bounds. Likewise, we need to
12129 check lexical blocks as well, as they may also contain subprogram
12131 while (child
&& child
->tag
)
12133 if (child
->tag
== DW_TAG_subprogram
12134 || child
->tag
== DW_TAG_lexical_block
)
12135 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12136 child
= sibling_die (child
);
12140 /* Get the low and high pc's represented by the scope DIE, and store
12141 them in *LOWPC and *HIGHPC. If the correct values can't be
12142 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12145 get_scope_pc_bounds (struct die_info
*die
,
12146 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12147 struct dwarf2_cu
*cu
)
12149 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12150 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12151 CORE_ADDR current_low
, current_high
;
12153 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12155 best_low
= current_low
;
12156 best_high
= current_high
;
12160 struct die_info
*child
= die
->child
;
12162 while (child
&& child
->tag
)
12164 switch (child
->tag
) {
12165 case DW_TAG_subprogram
:
12166 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12168 case DW_TAG_namespace
:
12169 case DW_TAG_module
:
12170 /* FIXME: carlton/2004-01-16: Should we do this for
12171 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12172 that current GCC's always emit the DIEs corresponding
12173 to definitions of methods of classes as children of a
12174 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12175 the DIEs giving the declarations, which could be
12176 anywhere). But I don't see any reason why the
12177 standards says that they have to be there. */
12178 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12180 if (current_low
!= ((CORE_ADDR
) -1))
12182 best_low
= min (best_low
, current_low
);
12183 best_high
= max (best_high
, current_high
);
12191 child
= sibling_die (child
);
12196 *highpc
= best_high
;
12199 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12203 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12204 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12206 struct objfile
*objfile
= cu
->objfile
;
12207 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12208 struct attribute
*attr
;
12209 struct attribute
*attr_high
;
12211 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12214 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12217 CORE_ADDR low
= attr_value_as_address (attr
);
12218 CORE_ADDR high
= attr_value_as_address (attr_high
);
12220 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12223 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12224 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12225 record_block_range (block
, low
, high
- 1);
12229 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12232 bfd
*obfd
= objfile
->obfd
;
12233 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12234 We take advantage of the fact that DW_AT_ranges does not appear
12235 in DW_TAG_compile_unit of DWO files. */
12236 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12238 /* The value of the DW_AT_ranges attribute is the offset of the
12239 address range list in the .debug_ranges section. */
12240 unsigned long offset
= (DW_UNSND (attr
)
12241 + (need_ranges_base
? cu
->ranges_base
: 0));
12242 const gdb_byte
*buffer
;
12244 /* For some target architectures, but not others, the
12245 read_address function sign-extends the addresses it returns.
12246 To recognize base address selection entries, we need a
12248 unsigned int addr_size
= cu
->header
.addr_size
;
12249 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12251 /* The base address, to which the next pair is relative. Note
12252 that this 'base' is a DWARF concept: most entries in a range
12253 list are relative, to reduce the number of relocs against the
12254 debugging information. This is separate from this function's
12255 'baseaddr' argument, which GDB uses to relocate debugging
12256 information from a shared library based on the address at
12257 which the library was loaded. */
12258 CORE_ADDR base
= cu
->base_address
;
12259 int base_known
= cu
->base_known
;
12261 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12262 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12264 complaint (&symfile_complaints
,
12265 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12269 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12273 unsigned int bytes_read
;
12274 CORE_ADDR start
, end
;
12276 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12277 buffer
+= bytes_read
;
12278 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12279 buffer
+= bytes_read
;
12281 /* Did we find the end of the range list? */
12282 if (start
== 0 && end
== 0)
12285 /* Did we find a base address selection entry? */
12286 else if ((start
& base_select_mask
) == base_select_mask
)
12292 /* We found an ordinary address range. */
12297 complaint (&symfile_complaints
,
12298 _("Invalid .debug_ranges data "
12299 "(no base address)"));
12305 /* Inverted range entries are invalid. */
12306 complaint (&symfile_complaints
,
12307 _("Invalid .debug_ranges data "
12308 "(inverted range)"));
12312 /* Empty range entries have no effect. */
12316 start
+= base
+ baseaddr
;
12317 end
+= base
+ baseaddr
;
12319 /* A not-uncommon case of bad debug info.
12320 Don't pollute the addrmap with bad data. */
12321 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12323 complaint (&symfile_complaints
,
12324 _(".debug_ranges entry has start address of zero"
12325 " [in module %s]"), objfile_name (objfile
));
12329 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12330 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12331 record_block_range (block
, start
, end
- 1);
12337 /* Check whether the producer field indicates either of GCC < 4.6, or the
12338 Intel C/C++ compiler, and cache the result in CU. */
12341 check_producer (struct dwarf2_cu
*cu
)
12346 if (cu
->producer
== NULL
)
12348 /* For unknown compilers expect their behavior is DWARF version
12351 GCC started to support .debug_types sections by -gdwarf-4 since
12352 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12353 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12354 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12355 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12357 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12359 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12360 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12362 else if (startswith (cu
->producer
, "Intel(R) C"))
12363 cu
->producer_is_icc
= 1;
12366 /* For other non-GCC compilers, expect their behavior is DWARF version
12370 cu
->checked_producer
= 1;
12373 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12374 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12375 during 4.6.0 experimental. */
12378 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12380 if (!cu
->checked_producer
)
12381 check_producer (cu
);
12383 return cu
->producer_is_gxx_lt_4_6
;
12386 /* Return the default accessibility type if it is not overriden by
12387 DW_AT_accessibility. */
12389 static enum dwarf_access_attribute
12390 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12392 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12394 /* The default DWARF 2 accessibility for members is public, the default
12395 accessibility for inheritance is private. */
12397 if (die
->tag
!= DW_TAG_inheritance
)
12398 return DW_ACCESS_public
;
12400 return DW_ACCESS_private
;
12404 /* DWARF 3+ defines the default accessibility a different way. The same
12405 rules apply now for DW_TAG_inheritance as for the members and it only
12406 depends on the container kind. */
12408 if (die
->parent
->tag
== DW_TAG_class_type
)
12409 return DW_ACCESS_private
;
12411 return DW_ACCESS_public
;
12415 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12416 offset. If the attribute was not found return 0, otherwise return
12417 1. If it was found but could not properly be handled, set *OFFSET
12421 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12424 struct attribute
*attr
;
12426 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12431 /* Note that we do not check for a section offset first here.
12432 This is because DW_AT_data_member_location is new in DWARF 4,
12433 so if we see it, we can assume that a constant form is really
12434 a constant and not a section offset. */
12435 if (attr_form_is_constant (attr
))
12436 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12437 else if (attr_form_is_section_offset (attr
))
12438 dwarf2_complex_location_expr_complaint ();
12439 else if (attr_form_is_block (attr
))
12440 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12442 dwarf2_complex_location_expr_complaint ();
12450 /* Add an aggregate field to the field list. */
12453 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12454 struct dwarf2_cu
*cu
)
12456 struct objfile
*objfile
= cu
->objfile
;
12457 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12458 struct nextfield
*new_field
;
12459 struct attribute
*attr
;
12461 const char *fieldname
= "";
12463 /* Allocate a new field list entry and link it in. */
12464 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12465 make_cleanup (xfree
, new_field
);
12466 memset (new_field
, 0, sizeof (struct nextfield
));
12468 if (die
->tag
== DW_TAG_inheritance
)
12470 new_field
->next
= fip
->baseclasses
;
12471 fip
->baseclasses
= new_field
;
12475 new_field
->next
= fip
->fields
;
12476 fip
->fields
= new_field
;
12480 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12482 new_field
->accessibility
= DW_UNSND (attr
);
12484 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12485 if (new_field
->accessibility
!= DW_ACCESS_public
)
12486 fip
->non_public_fields
= 1;
12488 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12490 new_field
->virtuality
= DW_UNSND (attr
);
12492 new_field
->virtuality
= DW_VIRTUALITY_none
;
12494 fp
= &new_field
->field
;
12496 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12500 /* Data member other than a C++ static data member. */
12502 /* Get type of field. */
12503 fp
->type
= die_type (die
, cu
);
12505 SET_FIELD_BITPOS (*fp
, 0);
12507 /* Get bit size of field (zero if none). */
12508 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12511 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12515 FIELD_BITSIZE (*fp
) = 0;
12518 /* Get bit offset of field. */
12519 if (handle_data_member_location (die
, cu
, &offset
))
12520 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12521 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12524 if (gdbarch_bits_big_endian (gdbarch
))
12526 /* For big endian bits, the DW_AT_bit_offset gives the
12527 additional bit offset from the MSB of the containing
12528 anonymous object to the MSB of the field. We don't
12529 have to do anything special since we don't need to
12530 know the size of the anonymous object. */
12531 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12535 /* For little endian bits, compute the bit offset to the
12536 MSB of the anonymous object, subtract off the number of
12537 bits from the MSB of the field to the MSB of the
12538 object, and then subtract off the number of bits of
12539 the field itself. The result is the bit offset of
12540 the LSB of the field. */
12541 int anonymous_size
;
12542 int bit_offset
= DW_UNSND (attr
);
12544 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12547 /* The size of the anonymous object containing
12548 the bit field is explicit, so use the
12549 indicated size (in bytes). */
12550 anonymous_size
= DW_UNSND (attr
);
12554 /* The size of the anonymous object containing
12555 the bit field must be inferred from the type
12556 attribute of the data member containing the
12558 anonymous_size
= TYPE_LENGTH (fp
->type
);
12560 SET_FIELD_BITPOS (*fp
,
12561 (FIELD_BITPOS (*fp
)
12562 + anonymous_size
* bits_per_byte
12563 - bit_offset
- FIELD_BITSIZE (*fp
)));
12567 /* Get name of field. */
12568 fieldname
= dwarf2_name (die
, cu
);
12569 if (fieldname
== NULL
)
12572 /* The name is already allocated along with this objfile, so we don't
12573 need to duplicate it for the type. */
12574 fp
->name
= fieldname
;
12576 /* Change accessibility for artificial fields (e.g. virtual table
12577 pointer or virtual base class pointer) to private. */
12578 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12580 FIELD_ARTIFICIAL (*fp
) = 1;
12581 new_field
->accessibility
= DW_ACCESS_private
;
12582 fip
->non_public_fields
= 1;
12585 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12587 /* C++ static member. */
12589 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12590 is a declaration, but all versions of G++ as of this writing
12591 (so through at least 3.2.1) incorrectly generate
12592 DW_TAG_variable tags. */
12594 const char *physname
;
12596 /* Get name of field. */
12597 fieldname
= dwarf2_name (die
, cu
);
12598 if (fieldname
== NULL
)
12601 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12603 /* Only create a symbol if this is an external value.
12604 new_symbol checks this and puts the value in the global symbol
12605 table, which we want. If it is not external, new_symbol
12606 will try to put the value in cu->list_in_scope which is wrong. */
12607 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12609 /* A static const member, not much different than an enum as far as
12610 we're concerned, except that we can support more types. */
12611 new_symbol (die
, NULL
, cu
);
12614 /* Get physical name. */
12615 physname
= dwarf2_physname (fieldname
, die
, cu
);
12617 /* The name is already allocated along with this objfile, so we don't
12618 need to duplicate it for the type. */
12619 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12620 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12621 FIELD_NAME (*fp
) = fieldname
;
12623 else if (die
->tag
== DW_TAG_inheritance
)
12627 /* C++ base class field. */
12628 if (handle_data_member_location (die
, cu
, &offset
))
12629 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12630 FIELD_BITSIZE (*fp
) = 0;
12631 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12632 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12633 fip
->nbaseclasses
++;
12637 /* Add a typedef defined in the scope of the FIP's class. */
12640 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12641 struct dwarf2_cu
*cu
)
12643 struct objfile
*objfile
= cu
->objfile
;
12644 struct typedef_field_list
*new_field
;
12645 struct attribute
*attr
;
12646 struct typedef_field
*fp
;
12647 char *fieldname
= "";
12649 /* Allocate a new field list entry and link it in. */
12650 new_field
= xzalloc (sizeof (*new_field
));
12651 make_cleanup (xfree
, new_field
);
12653 gdb_assert (die
->tag
== DW_TAG_typedef
);
12655 fp
= &new_field
->field
;
12657 /* Get name of field. */
12658 fp
->name
= dwarf2_name (die
, cu
);
12659 if (fp
->name
== NULL
)
12662 fp
->type
= read_type_die (die
, cu
);
12664 new_field
->next
= fip
->typedef_field_list
;
12665 fip
->typedef_field_list
= new_field
;
12666 fip
->typedef_field_list_count
++;
12669 /* Create the vector of fields, and attach it to the type. */
12672 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12673 struct dwarf2_cu
*cu
)
12675 int nfields
= fip
->nfields
;
12677 /* Record the field count, allocate space for the array of fields,
12678 and create blank accessibility bitfields if necessary. */
12679 TYPE_NFIELDS (type
) = nfields
;
12680 TYPE_FIELDS (type
) = (struct field
*)
12681 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12682 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12684 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12686 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12688 TYPE_FIELD_PRIVATE_BITS (type
) =
12689 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12690 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12692 TYPE_FIELD_PROTECTED_BITS (type
) =
12693 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12694 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12696 TYPE_FIELD_IGNORE_BITS (type
) =
12697 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12698 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12701 /* If the type has baseclasses, allocate and clear a bit vector for
12702 TYPE_FIELD_VIRTUAL_BITS. */
12703 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12705 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12706 unsigned char *pointer
;
12708 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12709 pointer
= TYPE_ALLOC (type
, num_bytes
);
12710 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12711 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12712 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12715 /* Copy the saved-up fields into the field vector. Start from the head of
12716 the list, adding to the tail of the field array, so that they end up in
12717 the same order in the array in which they were added to the list. */
12718 while (nfields
-- > 0)
12720 struct nextfield
*fieldp
;
12724 fieldp
= fip
->fields
;
12725 fip
->fields
= fieldp
->next
;
12729 fieldp
= fip
->baseclasses
;
12730 fip
->baseclasses
= fieldp
->next
;
12733 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12734 switch (fieldp
->accessibility
)
12736 case DW_ACCESS_private
:
12737 if (cu
->language
!= language_ada
)
12738 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12741 case DW_ACCESS_protected
:
12742 if (cu
->language
!= language_ada
)
12743 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12746 case DW_ACCESS_public
:
12750 /* Unknown accessibility. Complain and treat it as public. */
12752 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12753 fieldp
->accessibility
);
12757 if (nfields
< fip
->nbaseclasses
)
12759 switch (fieldp
->virtuality
)
12761 case DW_VIRTUALITY_virtual
:
12762 case DW_VIRTUALITY_pure_virtual
:
12763 if (cu
->language
== language_ada
)
12764 error (_("unexpected virtuality in component of Ada type"));
12765 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12772 /* Return true if this member function is a constructor, false
12776 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12778 const char *fieldname
;
12779 const char *type_name
;
12782 if (die
->parent
== NULL
)
12785 if (die
->parent
->tag
!= DW_TAG_structure_type
12786 && die
->parent
->tag
!= DW_TAG_union_type
12787 && die
->parent
->tag
!= DW_TAG_class_type
)
12790 fieldname
= dwarf2_name (die
, cu
);
12791 type_name
= dwarf2_name (die
->parent
, cu
);
12792 if (fieldname
== NULL
|| type_name
== NULL
)
12795 len
= strlen (fieldname
);
12796 return (strncmp (fieldname
, type_name
, len
) == 0
12797 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12800 /* Add a member function to the proper fieldlist. */
12803 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12804 struct type
*type
, struct dwarf2_cu
*cu
)
12806 struct objfile
*objfile
= cu
->objfile
;
12807 struct attribute
*attr
;
12808 struct fnfieldlist
*flp
;
12810 struct fn_field
*fnp
;
12811 const char *fieldname
;
12812 struct nextfnfield
*new_fnfield
;
12813 struct type
*this_type
;
12814 enum dwarf_access_attribute accessibility
;
12816 if (cu
->language
== language_ada
)
12817 error (_("unexpected member function in Ada type"));
12819 /* Get name of member function. */
12820 fieldname
= dwarf2_name (die
, cu
);
12821 if (fieldname
== NULL
)
12824 /* Look up member function name in fieldlist. */
12825 for (i
= 0; i
< fip
->nfnfields
; i
++)
12827 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12831 /* Create new list element if necessary. */
12832 if (i
< fip
->nfnfields
)
12833 flp
= &fip
->fnfieldlists
[i
];
12836 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12838 fip
->fnfieldlists
= (struct fnfieldlist
*)
12839 xrealloc (fip
->fnfieldlists
,
12840 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12841 * sizeof (struct fnfieldlist
));
12842 if (fip
->nfnfields
== 0)
12843 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12845 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12846 flp
->name
= fieldname
;
12849 i
= fip
->nfnfields
++;
12852 /* Create a new member function field and chain it to the field list
12854 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12855 make_cleanup (xfree
, new_fnfield
);
12856 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12857 new_fnfield
->next
= flp
->head
;
12858 flp
->head
= new_fnfield
;
12861 /* Fill in the member function field info. */
12862 fnp
= &new_fnfield
->fnfield
;
12864 /* Delay processing of the physname until later. */
12865 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12867 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12872 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12873 fnp
->physname
= physname
? physname
: "";
12876 fnp
->type
= alloc_type (objfile
);
12877 this_type
= read_type_die (die
, cu
);
12878 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12880 int nparams
= TYPE_NFIELDS (this_type
);
12882 /* TYPE is the domain of this method, and THIS_TYPE is the type
12883 of the method itself (TYPE_CODE_METHOD). */
12884 smash_to_method_type (fnp
->type
, type
,
12885 TYPE_TARGET_TYPE (this_type
),
12886 TYPE_FIELDS (this_type
),
12887 TYPE_NFIELDS (this_type
),
12888 TYPE_VARARGS (this_type
));
12890 /* Handle static member functions.
12891 Dwarf2 has no clean way to discern C++ static and non-static
12892 member functions. G++ helps GDB by marking the first
12893 parameter for non-static member functions (which is the this
12894 pointer) as artificial. We obtain this information from
12895 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12896 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12897 fnp
->voffset
= VOFFSET_STATIC
;
12900 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12901 dwarf2_full_name (fieldname
, die
, cu
));
12903 /* Get fcontext from DW_AT_containing_type if present. */
12904 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12905 fnp
->fcontext
= die_containing_type (die
, cu
);
12907 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12908 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12910 /* Get accessibility. */
12911 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12913 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12915 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12916 switch (accessibility
)
12918 case DW_ACCESS_private
:
12919 fnp
->is_private
= 1;
12921 case DW_ACCESS_protected
:
12922 fnp
->is_protected
= 1;
12926 /* Check for artificial methods. */
12927 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12928 if (attr
&& DW_UNSND (attr
) != 0)
12929 fnp
->is_artificial
= 1;
12931 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12933 /* Get index in virtual function table if it is a virtual member
12934 function. For older versions of GCC, this is an offset in the
12935 appropriate virtual table, as specified by DW_AT_containing_type.
12936 For everyone else, it is an expression to be evaluated relative
12937 to the object address. */
12939 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12942 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12944 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12946 /* Old-style GCC. */
12947 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12949 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12950 || (DW_BLOCK (attr
)->size
> 1
12951 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12952 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12954 struct dwarf_block blk
;
12957 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12959 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12960 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12961 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12962 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12963 dwarf2_complex_location_expr_complaint ();
12965 fnp
->voffset
/= cu
->header
.addr_size
;
12969 dwarf2_complex_location_expr_complaint ();
12971 if (!fnp
->fcontext
)
12973 /* If there is no `this' field and no DW_AT_containing_type,
12974 we cannot actually find a base class context for the
12976 if (TYPE_NFIELDS (this_type
) == 0
12977 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12979 complaint (&symfile_complaints
,
12980 _("cannot determine context for virtual member "
12981 "function \"%s\" (offset %d)"),
12982 fieldname
, die
->offset
.sect_off
);
12987 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12991 else if (attr_form_is_section_offset (attr
))
12993 dwarf2_complex_location_expr_complaint ();
12997 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13003 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13004 if (attr
&& DW_UNSND (attr
))
13006 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13007 complaint (&symfile_complaints
,
13008 _("Member function \"%s\" (offset %d) is virtual "
13009 "but the vtable offset is not specified"),
13010 fieldname
, die
->offset
.sect_off
);
13011 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13012 TYPE_CPLUS_DYNAMIC (type
) = 1;
13017 /* Create the vector of member function fields, and attach it to the type. */
13020 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13021 struct dwarf2_cu
*cu
)
13023 struct fnfieldlist
*flp
;
13026 if (cu
->language
== language_ada
)
13027 error (_("unexpected member functions in Ada type"));
13029 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13030 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13031 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13033 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13035 struct nextfnfield
*nfp
= flp
->head
;
13036 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13039 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13040 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13041 fn_flp
->fn_fields
= (struct fn_field
*)
13042 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13043 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13044 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13047 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13050 /* Returns non-zero if NAME is the name of a vtable member in CU's
13051 language, zero otherwise. */
13053 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13055 static const char vptr
[] = "_vptr";
13056 static const char vtable
[] = "vtable";
13058 /* Look for the C++ and Java forms of the vtable. */
13059 if ((cu
->language
== language_java
13060 && startswith (name
, vtable
))
13061 || (startswith (name
, vptr
)
13062 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13068 /* GCC outputs unnamed structures that are really pointers to member
13069 functions, with the ABI-specified layout. If TYPE describes
13070 such a structure, smash it into a member function type.
13072 GCC shouldn't do this; it should just output pointer to member DIEs.
13073 This is GCC PR debug/28767. */
13076 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13078 struct type
*pfn_type
, *self_type
, *new_type
;
13080 /* Check for a structure with no name and two children. */
13081 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13084 /* Check for __pfn and __delta members. */
13085 if (TYPE_FIELD_NAME (type
, 0) == NULL
13086 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13087 || TYPE_FIELD_NAME (type
, 1) == NULL
13088 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13091 /* Find the type of the method. */
13092 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13093 if (pfn_type
== NULL
13094 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13095 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13098 /* Look for the "this" argument. */
13099 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13100 if (TYPE_NFIELDS (pfn_type
) == 0
13101 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13102 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13105 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13106 new_type
= alloc_type (objfile
);
13107 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13108 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13109 TYPE_VARARGS (pfn_type
));
13110 smash_to_methodptr_type (type
, new_type
);
13113 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13117 producer_is_icc (struct dwarf2_cu
*cu
)
13119 if (!cu
->checked_producer
)
13120 check_producer (cu
);
13122 return cu
->producer_is_icc
;
13125 /* Called when we find the DIE that starts a structure or union scope
13126 (definition) to create a type for the structure or union. Fill in
13127 the type's name and general properties; the members will not be
13128 processed until process_structure_scope. A symbol table entry for
13129 the type will also not be done until process_structure_scope (assuming
13130 the type has a name).
13132 NOTE: we need to call these functions regardless of whether or not the
13133 DIE has a DW_AT_name attribute, since it might be an anonymous
13134 structure or union. This gets the type entered into our set of
13135 user defined types. */
13137 static struct type
*
13138 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13140 struct objfile
*objfile
= cu
->objfile
;
13142 struct attribute
*attr
;
13145 /* If the definition of this type lives in .debug_types, read that type.
13146 Don't follow DW_AT_specification though, that will take us back up
13147 the chain and we want to go down. */
13148 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13151 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13153 /* The type's CU may not be the same as CU.
13154 Ensure TYPE is recorded with CU in die_type_hash. */
13155 return set_die_type (die
, type
, cu
);
13158 type
= alloc_type (objfile
);
13159 INIT_CPLUS_SPECIFIC (type
);
13161 name
= dwarf2_name (die
, cu
);
13164 if (cu
->language
== language_cplus
13165 || cu
->language
== language_java
13166 || cu
->language
== language_d
)
13168 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13170 /* dwarf2_full_name might have already finished building the DIE's
13171 type. If so, there is no need to continue. */
13172 if (get_die_type (die
, cu
) != NULL
)
13173 return get_die_type (die
, cu
);
13175 TYPE_TAG_NAME (type
) = full_name
;
13176 if (die
->tag
== DW_TAG_structure_type
13177 || die
->tag
== DW_TAG_class_type
)
13178 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13182 /* The name is already allocated along with this objfile, so
13183 we don't need to duplicate it for the type. */
13184 TYPE_TAG_NAME (type
) = name
;
13185 if (die
->tag
== DW_TAG_class_type
)
13186 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13190 if (die
->tag
== DW_TAG_structure_type
)
13192 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13194 else if (die
->tag
== DW_TAG_union_type
)
13196 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13200 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13203 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13204 TYPE_DECLARED_CLASS (type
) = 1;
13206 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13209 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13213 TYPE_LENGTH (type
) = 0;
13216 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13218 /* ICC does not output the required DW_AT_declaration
13219 on incomplete types, but gives them a size of zero. */
13220 TYPE_STUB (type
) = 1;
13223 TYPE_STUB_SUPPORTED (type
) = 1;
13225 if (die_is_declaration (die
, cu
))
13226 TYPE_STUB (type
) = 1;
13227 else if (attr
== NULL
&& die
->child
== NULL
13228 && producer_is_realview (cu
->producer
))
13229 /* RealView does not output the required DW_AT_declaration
13230 on incomplete types. */
13231 TYPE_STUB (type
) = 1;
13233 /* We need to add the type field to the die immediately so we don't
13234 infinitely recurse when dealing with pointers to the structure
13235 type within the structure itself. */
13236 set_die_type (die
, type
, cu
);
13238 /* set_die_type should be already done. */
13239 set_descriptive_type (type
, die
, cu
);
13244 /* Finish creating a structure or union type, including filling in
13245 its members and creating a symbol for it. */
13248 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13250 struct objfile
*objfile
= cu
->objfile
;
13251 struct die_info
*child_die
;
13254 type
= get_die_type (die
, cu
);
13256 type
= read_structure_type (die
, cu
);
13258 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13260 struct field_info fi
;
13261 VEC (symbolp
) *template_args
= NULL
;
13262 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13264 memset (&fi
, 0, sizeof (struct field_info
));
13266 child_die
= die
->child
;
13268 while (child_die
&& child_die
->tag
)
13270 if (child_die
->tag
== DW_TAG_member
13271 || child_die
->tag
== DW_TAG_variable
)
13273 /* NOTE: carlton/2002-11-05: A C++ static data member
13274 should be a DW_TAG_member that is a declaration, but
13275 all versions of G++ as of this writing (so through at
13276 least 3.2.1) incorrectly generate DW_TAG_variable
13277 tags for them instead. */
13278 dwarf2_add_field (&fi
, child_die
, cu
);
13280 else if (child_die
->tag
== DW_TAG_subprogram
)
13282 /* C++ member function. */
13283 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13285 else if (child_die
->tag
== DW_TAG_inheritance
)
13287 /* C++ base class field. */
13288 dwarf2_add_field (&fi
, child_die
, cu
);
13290 else if (child_die
->tag
== DW_TAG_typedef
)
13291 dwarf2_add_typedef (&fi
, child_die
, cu
);
13292 else if (child_die
->tag
== DW_TAG_template_type_param
13293 || child_die
->tag
== DW_TAG_template_value_param
)
13295 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13298 VEC_safe_push (symbolp
, template_args
, arg
);
13301 child_die
= sibling_die (child_die
);
13304 /* Attach template arguments to type. */
13305 if (! VEC_empty (symbolp
, template_args
))
13307 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13308 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13309 = VEC_length (symbolp
, template_args
);
13310 TYPE_TEMPLATE_ARGUMENTS (type
)
13311 = obstack_alloc (&objfile
->objfile_obstack
,
13312 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13313 * sizeof (struct symbol
*)));
13314 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13315 VEC_address (symbolp
, template_args
),
13316 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13317 * sizeof (struct symbol
*)));
13318 VEC_free (symbolp
, template_args
);
13321 /* Attach fields and member functions to the type. */
13323 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13326 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13328 /* Get the type which refers to the base class (possibly this
13329 class itself) which contains the vtable pointer for the current
13330 class from the DW_AT_containing_type attribute. This use of
13331 DW_AT_containing_type is a GNU extension. */
13333 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13335 struct type
*t
= die_containing_type (die
, cu
);
13337 set_type_vptr_basetype (type
, t
);
13342 /* Our own class provides vtbl ptr. */
13343 for (i
= TYPE_NFIELDS (t
) - 1;
13344 i
>= TYPE_N_BASECLASSES (t
);
13347 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13349 if (is_vtable_name (fieldname
, cu
))
13351 set_type_vptr_fieldno (type
, i
);
13356 /* Complain if virtual function table field not found. */
13357 if (i
< TYPE_N_BASECLASSES (t
))
13358 complaint (&symfile_complaints
,
13359 _("virtual function table pointer "
13360 "not found when defining class '%s'"),
13361 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13366 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13369 else if (cu
->producer
13370 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13372 /* The IBM XLC compiler does not provide direct indication
13373 of the containing type, but the vtable pointer is
13374 always named __vfp. */
13378 for (i
= TYPE_NFIELDS (type
) - 1;
13379 i
>= TYPE_N_BASECLASSES (type
);
13382 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13384 set_type_vptr_fieldno (type
, i
);
13385 set_type_vptr_basetype (type
, type
);
13392 /* Copy fi.typedef_field_list linked list elements content into the
13393 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13394 if (fi
.typedef_field_list
)
13396 int i
= fi
.typedef_field_list_count
;
13398 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13399 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13400 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13401 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13403 /* Reverse the list order to keep the debug info elements order. */
13406 struct typedef_field
*dest
, *src
;
13408 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13409 src
= &fi
.typedef_field_list
->field
;
13410 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13415 do_cleanups (back_to
);
13417 if (HAVE_CPLUS_STRUCT (type
))
13418 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13421 quirk_gcc_member_function_pointer (type
, objfile
);
13423 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13424 snapshots) has been known to create a die giving a declaration
13425 for a class that has, as a child, a die giving a definition for a
13426 nested class. So we have to process our children even if the
13427 current die is a declaration. Normally, of course, a declaration
13428 won't have any children at all. */
13430 child_die
= die
->child
;
13432 while (child_die
!= NULL
&& child_die
->tag
)
13434 if (child_die
->tag
== DW_TAG_member
13435 || child_die
->tag
== DW_TAG_variable
13436 || child_die
->tag
== DW_TAG_inheritance
13437 || child_die
->tag
== DW_TAG_template_value_param
13438 || child_die
->tag
== DW_TAG_template_type_param
)
13443 process_die (child_die
, cu
);
13445 child_die
= sibling_die (child_die
);
13448 /* Do not consider external references. According to the DWARF standard,
13449 these DIEs are identified by the fact that they have no byte_size
13450 attribute, and a declaration attribute. */
13451 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13452 || !die_is_declaration (die
, cu
))
13453 new_symbol (die
, type
, cu
);
13456 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13457 update TYPE using some information only available in DIE's children. */
13460 update_enumeration_type_from_children (struct die_info
*die
,
13462 struct dwarf2_cu
*cu
)
13464 struct obstack obstack
;
13465 struct die_info
*child_die
;
13466 int unsigned_enum
= 1;
13469 struct cleanup
*old_chain
;
13471 obstack_init (&obstack
);
13472 old_chain
= make_cleanup_obstack_free (&obstack
);
13474 for (child_die
= die
->child
;
13475 child_die
!= NULL
&& child_die
->tag
;
13476 child_die
= sibling_die (child_die
))
13478 struct attribute
*attr
;
13480 const gdb_byte
*bytes
;
13481 struct dwarf2_locexpr_baton
*baton
;
13484 if (child_die
->tag
!= DW_TAG_enumerator
)
13487 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13491 name
= dwarf2_name (child_die
, cu
);
13493 name
= "<anonymous enumerator>";
13495 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13496 &value
, &bytes
, &baton
);
13502 else if ((mask
& value
) != 0)
13507 /* If we already know that the enum type is neither unsigned, nor
13508 a flag type, no need to look at the rest of the enumerates. */
13509 if (!unsigned_enum
&& !flag_enum
)
13514 TYPE_UNSIGNED (type
) = 1;
13516 TYPE_FLAG_ENUM (type
) = 1;
13518 do_cleanups (old_chain
);
13521 /* Given a DW_AT_enumeration_type die, set its type. We do not
13522 complete the type's fields yet, or create any symbols. */
13524 static struct type
*
13525 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13527 struct objfile
*objfile
= cu
->objfile
;
13529 struct attribute
*attr
;
13532 /* If the definition of this type lives in .debug_types, read that type.
13533 Don't follow DW_AT_specification though, that will take us back up
13534 the chain and we want to go down. */
13535 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13538 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13540 /* The type's CU may not be the same as CU.
13541 Ensure TYPE is recorded with CU in die_type_hash. */
13542 return set_die_type (die
, type
, cu
);
13545 type
= alloc_type (objfile
);
13547 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13548 name
= dwarf2_full_name (NULL
, die
, cu
);
13550 TYPE_TAG_NAME (type
) = name
;
13552 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13555 struct type
*underlying_type
= die_type (die
, cu
);
13557 TYPE_TARGET_TYPE (type
) = underlying_type
;
13560 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13563 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13567 TYPE_LENGTH (type
) = 0;
13570 /* The enumeration DIE can be incomplete. In Ada, any type can be
13571 declared as private in the package spec, and then defined only
13572 inside the package body. Such types are known as Taft Amendment
13573 Types. When another package uses such a type, an incomplete DIE
13574 may be generated by the compiler. */
13575 if (die_is_declaration (die
, cu
))
13576 TYPE_STUB (type
) = 1;
13578 /* Finish the creation of this type by using the enum's children.
13579 We must call this even when the underlying type has been provided
13580 so that we can determine if we're looking at a "flag" enum. */
13581 update_enumeration_type_from_children (die
, type
, cu
);
13583 /* If this type has an underlying type that is not a stub, then we
13584 may use its attributes. We always use the "unsigned" attribute
13585 in this situation, because ordinarily we guess whether the type
13586 is unsigned -- but the guess can be wrong and the underlying type
13587 can tell us the reality. However, we defer to a local size
13588 attribute if one exists, because this lets the compiler override
13589 the underlying type if needed. */
13590 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13592 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13593 if (TYPE_LENGTH (type
) == 0)
13594 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13597 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13599 return set_die_type (die
, type
, cu
);
13602 /* Given a pointer to a die which begins an enumeration, process all
13603 the dies that define the members of the enumeration, and create the
13604 symbol for the enumeration type.
13606 NOTE: We reverse the order of the element list. */
13609 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13611 struct type
*this_type
;
13613 this_type
= get_die_type (die
, cu
);
13614 if (this_type
== NULL
)
13615 this_type
= read_enumeration_type (die
, cu
);
13617 if (die
->child
!= NULL
)
13619 struct die_info
*child_die
;
13620 struct symbol
*sym
;
13621 struct field
*fields
= NULL
;
13622 int num_fields
= 0;
13625 child_die
= die
->child
;
13626 while (child_die
&& child_die
->tag
)
13628 if (child_die
->tag
!= DW_TAG_enumerator
)
13630 process_die (child_die
, cu
);
13634 name
= dwarf2_name (child_die
, cu
);
13637 sym
= new_symbol (child_die
, this_type
, cu
);
13639 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13641 fields
= (struct field
*)
13643 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13644 * sizeof (struct field
));
13647 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13648 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13649 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13650 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13656 child_die
= sibling_die (child_die
);
13661 TYPE_NFIELDS (this_type
) = num_fields
;
13662 TYPE_FIELDS (this_type
) = (struct field
*)
13663 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13664 memcpy (TYPE_FIELDS (this_type
), fields
,
13665 sizeof (struct field
) * num_fields
);
13670 /* If we are reading an enum from a .debug_types unit, and the enum
13671 is a declaration, and the enum is not the signatured type in the
13672 unit, then we do not want to add a symbol for it. Adding a
13673 symbol would in some cases obscure the true definition of the
13674 enum, giving users an incomplete type when the definition is
13675 actually available. Note that we do not want to do this for all
13676 enums which are just declarations, because C++0x allows forward
13677 enum declarations. */
13678 if (cu
->per_cu
->is_debug_types
13679 && die_is_declaration (die
, cu
))
13681 struct signatured_type
*sig_type
;
13683 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13684 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13685 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13689 new_symbol (die
, this_type
, cu
);
13692 /* Extract all information from a DW_TAG_array_type DIE and put it in
13693 the DIE's type field. For now, this only handles one dimensional
13696 static struct type
*
13697 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13699 struct objfile
*objfile
= cu
->objfile
;
13700 struct die_info
*child_die
;
13702 struct type
*element_type
, *range_type
, *index_type
;
13703 struct type
**range_types
= NULL
;
13704 struct attribute
*attr
;
13706 struct cleanup
*back_to
;
13708 unsigned int bit_stride
= 0;
13710 element_type
= die_type (die
, cu
);
13712 /* The die_type call above may have already set the type for this DIE. */
13713 type
= get_die_type (die
, cu
);
13717 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13719 bit_stride
= DW_UNSND (attr
) * 8;
13721 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13723 bit_stride
= DW_UNSND (attr
);
13725 /* Irix 6.2 native cc creates array types without children for
13726 arrays with unspecified length. */
13727 if (die
->child
== NULL
)
13729 index_type
= objfile_type (objfile
)->builtin_int
;
13730 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13731 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13733 return set_die_type (die
, type
, cu
);
13736 back_to
= make_cleanup (null_cleanup
, NULL
);
13737 child_die
= die
->child
;
13738 while (child_die
&& child_die
->tag
)
13740 if (child_die
->tag
== DW_TAG_subrange_type
)
13742 struct type
*child_type
= read_type_die (child_die
, cu
);
13744 if (child_type
!= NULL
)
13746 /* The range type was succesfully read. Save it for the
13747 array type creation. */
13748 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13750 range_types
= (struct type
**)
13751 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13752 * sizeof (struct type
*));
13754 make_cleanup (free_current_contents
, &range_types
);
13756 range_types
[ndim
++] = child_type
;
13759 child_die
= sibling_die (child_die
);
13762 /* Dwarf2 dimensions are output from left to right, create the
13763 necessary array types in backwards order. */
13765 type
= element_type
;
13767 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13772 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13778 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13782 /* Understand Dwarf2 support for vector types (like they occur on
13783 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13784 array type. This is not part of the Dwarf2/3 standard yet, but a
13785 custom vendor extension. The main difference between a regular
13786 array and the vector variant is that vectors are passed by value
13788 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13790 make_vector_type (type
);
13792 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13793 implementation may choose to implement triple vectors using this
13795 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13798 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13799 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13801 complaint (&symfile_complaints
,
13802 _("DW_AT_byte_size for array type smaller "
13803 "than the total size of elements"));
13806 name
= dwarf2_name (die
, cu
);
13808 TYPE_NAME (type
) = name
;
13810 /* Install the type in the die. */
13811 set_die_type (die
, type
, cu
);
13813 /* set_die_type should be already done. */
13814 set_descriptive_type (type
, die
, cu
);
13816 do_cleanups (back_to
);
13821 static enum dwarf_array_dim_ordering
13822 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13824 struct attribute
*attr
;
13826 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13829 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13831 /* GNU F77 is a special case, as at 08/2004 array type info is the
13832 opposite order to the dwarf2 specification, but data is still
13833 laid out as per normal fortran.
13835 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13836 version checking. */
13838 if (cu
->language
== language_fortran
13839 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13841 return DW_ORD_row_major
;
13844 switch (cu
->language_defn
->la_array_ordering
)
13846 case array_column_major
:
13847 return DW_ORD_col_major
;
13848 case array_row_major
:
13850 return DW_ORD_row_major
;
13854 /* Extract all information from a DW_TAG_set_type DIE and put it in
13855 the DIE's type field. */
13857 static struct type
*
13858 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13860 struct type
*domain_type
, *set_type
;
13861 struct attribute
*attr
;
13863 domain_type
= die_type (die
, cu
);
13865 /* The die_type call above may have already set the type for this DIE. */
13866 set_type
= get_die_type (die
, cu
);
13870 set_type
= create_set_type (NULL
, domain_type
);
13872 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13874 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13876 return set_die_type (die
, set_type
, cu
);
13879 /* A helper for read_common_block that creates a locexpr baton.
13880 SYM is the symbol which we are marking as computed.
13881 COMMON_DIE is the DIE for the common block.
13882 COMMON_LOC is the location expression attribute for the common
13884 MEMBER_LOC is the location expression attribute for the particular
13885 member of the common block that we are processing.
13886 CU is the CU from which the above come. */
13889 mark_common_block_symbol_computed (struct symbol
*sym
,
13890 struct die_info
*common_die
,
13891 struct attribute
*common_loc
,
13892 struct attribute
*member_loc
,
13893 struct dwarf2_cu
*cu
)
13895 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13896 struct dwarf2_locexpr_baton
*baton
;
13898 unsigned int cu_off
;
13899 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13900 LONGEST offset
= 0;
13902 gdb_assert (common_loc
&& member_loc
);
13903 gdb_assert (attr_form_is_block (common_loc
));
13904 gdb_assert (attr_form_is_block (member_loc
)
13905 || attr_form_is_constant (member_loc
));
13907 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13908 sizeof (struct dwarf2_locexpr_baton
));
13909 baton
->per_cu
= cu
->per_cu
;
13910 gdb_assert (baton
->per_cu
);
13912 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13914 if (attr_form_is_constant (member_loc
))
13916 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13917 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13920 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13922 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13925 *ptr
++ = DW_OP_call4
;
13926 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13927 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13930 if (attr_form_is_constant (member_loc
))
13932 *ptr
++ = DW_OP_addr
;
13933 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13934 ptr
+= cu
->header
.addr_size
;
13938 /* We have to copy the data here, because DW_OP_call4 will only
13939 use a DW_AT_location attribute. */
13940 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13941 ptr
+= DW_BLOCK (member_loc
)->size
;
13944 *ptr
++ = DW_OP_plus
;
13945 gdb_assert (ptr
- baton
->data
== baton
->size
);
13947 SYMBOL_LOCATION_BATON (sym
) = baton
;
13948 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13951 /* Create appropriate locally-scoped variables for all the
13952 DW_TAG_common_block entries. Also create a struct common_block
13953 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13954 is used to sepate the common blocks name namespace from regular
13958 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13960 struct attribute
*attr
;
13962 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13965 /* Support the .debug_loc offsets. */
13966 if (attr_form_is_block (attr
))
13970 else if (attr_form_is_section_offset (attr
))
13972 dwarf2_complex_location_expr_complaint ();
13977 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13978 "common block member");
13983 if (die
->child
!= NULL
)
13985 struct objfile
*objfile
= cu
->objfile
;
13986 struct die_info
*child_die
;
13987 size_t n_entries
= 0, size
;
13988 struct common_block
*common_block
;
13989 struct symbol
*sym
;
13991 for (child_die
= die
->child
;
13992 child_die
&& child_die
->tag
;
13993 child_die
= sibling_die (child_die
))
13996 size
= (sizeof (struct common_block
)
13997 + (n_entries
- 1) * sizeof (struct symbol
*));
13998 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13999 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14000 common_block
->n_entries
= 0;
14002 for (child_die
= die
->child
;
14003 child_die
&& child_die
->tag
;
14004 child_die
= sibling_die (child_die
))
14006 /* Create the symbol in the DW_TAG_common_block block in the current
14008 sym
= new_symbol (child_die
, NULL
, cu
);
14011 struct attribute
*member_loc
;
14013 common_block
->contents
[common_block
->n_entries
++] = sym
;
14015 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14019 /* GDB has handled this for a long time, but it is
14020 not specified by DWARF. It seems to have been
14021 emitted by gfortran at least as recently as:
14022 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14023 complaint (&symfile_complaints
,
14024 _("Variable in common block has "
14025 "DW_AT_data_member_location "
14026 "- DIE at 0x%x [in module %s]"),
14027 child_die
->offset
.sect_off
,
14028 objfile_name (cu
->objfile
));
14030 if (attr_form_is_section_offset (member_loc
))
14031 dwarf2_complex_location_expr_complaint ();
14032 else if (attr_form_is_constant (member_loc
)
14033 || attr_form_is_block (member_loc
))
14036 mark_common_block_symbol_computed (sym
, die
, attr
,
14040 dwarf2_complex_location_expr_complaint ();
14045 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14046 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14050 /* Create a type for a C++ namespace. */
14052 static struct type
*
14053 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14055 struct objfile
*objfile
= cu
->objfile
;
14056 const char *previous_prefix
, *name
;
14060 /* For extensions, reuse the type of the original namespace. */
14061 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14063 struct die_info
*ext_die
;
14064 struct dwarf2_cu
*ext_cu
= cu
;
14066 ext_die
= dwarf2_extension (die
, &ext_cu
);
14067 type
= read_type_die (ext_die
, ext_cu
);
14069 /* EXT_CU may not be the same as CU.
14070 Ensure TYPE is recorded with CU in die_type_hash. */
14071 return set_die_type (die
, type
, cu
);
14074 name
= namespace_name (die
, &is_anonymous
, cu
);
14076 /* Now build the name of the current namespace. */
14078 previous_prefix
= determine_prefix (die
, cu
);
14079 if (previous_prefix
[0] != '\0')
14080 name
= typename_concat (&objfile
->objfile_obstack
,
14081 previous_prefix
, name
, 0, cu
);
14083 /* Create the type. */
14084 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14086 TYPE_NAME (type
) = name
;
14087 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14089 return set_die_type (die
, type
, cu
);
14092 /* Read a namespace scope. */
14095 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14097 struct objfile
*objfile
= cu
->objfile
;
14100 /* Add a symbol associated to this if we haven't seen the namespace
14101 before. Also, add a using directive if it's an anonymous
14104 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14108 type
= read_type_die (die
, cu
);
14109 new_symbol (die
, type
, cu
);
14111 namespace_name (die
, &is_anonymous
, cu
);
14114 const char *previous_prefix
= determine_prefix (die
, cu
);
14116 add_using_directive (using_directives (cu
->language
),
14117 previous_prefix
, TYPE_NAME (type
), NULL
,
14118 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14122 if (die
->child
!= NULL
)
14124 struct die_info
*child_die
= die
->child
;
14126 while (child_die
&& child_die
->tag
)
14128 process_die (child_die
, cu
);
14129 child_die
= sibling_die (child_die
);
14134 /* Read a Fortran module as type. This DIE can be only a declaration used for
14135 imported module. Still we need that type as local Fortran "use ... only"
14136 declaration imports depend on the created type in determine_prefix. */
14138 static struct type
*
14139 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14141 struct objfile
*objfile
= cu
->objfile
;
14142 const char *module_name
;
14145 module_name
= dwarf2_name (die
, cu
);
14147 complaint (&symfile_complaints
,
14148 _("DW_TAG_module has no name, offset 0x%x"),
14149 die
->offset
.sect_off
);
14150 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14152 /* determine_prefix uses TYPE_TAG_NAME. */
14153 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14155 return set_die_type (die
, type
, cu
);
14158 /* Read a Fortran module. */
14161 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14163 struct die_info
*child_die
= die
->child
;
14166 type
= read_type_die (die
, cu
);
14167 new_symbol (die
, type
, cu
);
14169 while (child_die
&& child_die
->tag
)
14171 process_die (child_die
, cu
);
14172 child_die
= sibling_die (child_die
);
14176 /* Return the name of the namespace represented by DIE. Set
14177 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14180 static const char *
14181 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14183 struct die_info
*current_die
;
14184 const char *name
= NULL
;
14186 /* Loop through the extensions until we find a name. */
14188 for (current_die
= die
;
14189 current_die
!= NULL
;
14190 current_die
= dwarf2_extension (die
, &cu
))
14192 /* We don't use dwarf2_name here so that we can detect the absence
14193 of a name -> anonymous namespace. */
14194 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14197 name
= DW_STRING (attr
);
14202 /* Is it an anonymous namespace? */
14204 *is_anonymous
= (name
== NULL
);
14206 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14211 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14212 the user defined type vector. */
14214 static struct type
*
14215 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14217 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14218 struct comp_unit_head
*cu_header
= &cu
->header
;
14220 struct attribute
*attr_byte_size
;
14221 struct attribute
*attr_address_class
;
14222 int byte_size
, addr_class
;
14223 struct type
*target_type
;
14225 target_type
= die_type (die
, cu
);
14227 /* The die_type call above may have already set the type for this DIE. */
14228 type
= get_die_type (die
, cu
);
14232 type
= lookup_pointer_type (target_type
);
14234 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14235 if (attr_byte_size
)
14236 byte_size
= DW_UNSND (attr_byte_size
);
14238 byte_size
= cu_header
->addr_size
;
14240 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14241 if (attr_address_class
)
14242 addr_class
= DW_UNSND (attr_address_class
);
14244 addr_class
= DW_ADDR_none
;
14246 /* If the pointer size or address class is different than the
14247 default, create a type variant marked as such and set the
14248 length accordingly. */
14249 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14251 if (gdbarch_address_class_type_flags_p (gdbarch
))
14255 type_flags
= gdbarch_address_class_type_flags
14256 (gdbarch
, byte_size
, addr_class
);
14257 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14259 type
= make_type_with_address_space (type
, type_flags
);
14261 else if (TYPE_LENGTH (type
) != byte_size
)
14263 complaint (&symfile_complaints
,
14264 _("invalid pointer size %d"), byte_size
);
14268 /* Should we also complain about unhandled address classes? */
14272 TYPE_LENGTH (type
) = byte_size
;
14273 return set_die_type (die
, type
, cu
);
14276 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14277 the user defined type vector. */
14279 static struct type
*
14280 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14283 struct type
*to_type
;
14284 struct type
*domain
;
14286 to_type
= die_type (die
, cu
);
14287 domain
= die_containing_type (die
, cu
);
14289 /* The calls above may have already set the type for this DIE. */
14290 type
= get_die_type (die
, cu
);
14294 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14295 type
= lookup_methodptr_type (to_type
);
14296 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14298 struct type
*new_type
= alloc_type (cu
->objfile
);
14300 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14301 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14302 TYPE_VARARGS (to_type
));
14303 type
= lookup_methodptr_type (new_type
);
14306 type
= lookup_memberptr_type (to_type
, domain
);
14308 return set_die_type (die
, type
, cu
);
14311 /* Extract all information from a DW_TAG_reference_type DIE and add to
14312 the user defined type vector. */
14314 static struct type
*
14315 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14317 struct comp_unit_head
*cu_header
= &cu
->header
;
14318 struct type
*type
, *target_type
;
14319 struct attribute
*attr
;
14321 target_type
= die_type (die
, cu
);
14323 /* The die_type call above may have already set the type for this DIE. */
14324 type
= get_die_type (die
, cu
);
14328 type
= lookup_reference_type (target_type
);
14329 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14332 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14336 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14338 return set_die_type (die
, type
, cu
);
14341 /* Add the given cv-qualifiers to the element type of the array. GCC
14342 outputs DWARF type qualifiers that apply to an array, not the
14343 element type. But GDB relies on the array element type to carry
14344 the cv-qualifiers. This mimics section 6.7.3 of the C99
14347 static struct type
*
14348 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14349 struct type
*base_type
, int cnst
, int voltl
)
14351 struct type
*el_type
, *inner_array
;
14353 base_type
= copy_type (base_type
);
14354 inner_array
= base_type
;
14356 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14358 TYPE_TARGET_TYPE (inner_array
) =
14359 copy_type (TYPE_TARGET_TYPE (inner_array
));
14360 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14363 el_type
= TYPE_TARGET_TYPE (inner_array
);
14364 cnst
|= TYPE_CONST (el_type
);
14365 voltl
|= TYPE_VOLATILE (el_type
);
14366 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14368 return set_die_type (die
, base_type
, cu
);
14371 static struct type
*
14372 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14374 struct type
*base_type
, *cv_type
;
14376 base_type
= die_type (die
, cu
);
14378 /* The die_type call above may have already set the type for this DIE. */
14379 cv_type
= get_die_type (die
, cu
);
14383 /* In case the const qualifier is applied to an array type, the element type
14384 is so qualified, not the array type (section 6.7.3 of C99). */
14385 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14386 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14388 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14389 return set_die_type (die
, cv_type
, cu
);
14392 static struct type
*
14393 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14395 struct type
*base_type
, *cv_type
;
14397 base_type
= die_type (die
, cu
);
14399 /* The die_type call above may have already set the type for this DIE. */
14400 cv_type
= get_die_type (die
, cu
);
14404 /* In case the volatile qualifier is applied to an array type, the
14405 element type is so qualified, not the array type (section 6.7.3
14407 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14408 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14410 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14411 return set_die_type (die
, cv_type
, cu
);
14414 /* Handle DW_TAG_restrict_type. */
14416 static struct type
*
14417 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14419 struct type
*base_type
, *cv_type
;
14421 base_type
= die_type (die
, cu
);
14423 /* The die_type call above may have already set the type for this DIE. */
14424 cv_type
= get_die_type (die
, cu
);
14428 cv_type
= make_restrict_type (base_type
);
14429 return set_die_type (die
, cv_type
, cu
);
14432 /* Handle DW_TAG_atomic_type. */
14434 static struct type
*
14435 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14437 struct type
*base_type
, *cv_type
;
14439 base_type
= die_type (die
, cu
);
14441 /* The die_type call above may have already set the type for this DIE. */
14442 cv_type
= get_die_type (die
, cu
);
14446 cv_type
= make_atomic_type (base_type
);
14447 return set_die_type (die
, cv_type
, cu
);
14450 /* Extract all information from a DW_TAG_string_type DIE and add to
14451 the user defined type vector. It isn't really a user defined type,
14452 but it behaves like one, with other DIE's using an AT_user_def_type
14453 attribute to reference it. */
14455 static struct type
*
14456 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14458 struct objfile
*objfile
= cu
->objfile
;
14459 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14460 struct type
*type
, *range_type
, *index_type
, *char_type
;
14461 struct attribute
*attr
;
14462 unsigned int length
;
14464 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14467 length
= DW_UNSND (attr
);
14471 /* Check for the DW_AT_byte_size attribute. */
14472 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14475 length
= DW_UNSND (attr
);
14483 index_type
= objfile_type (objfile
)->builtin_int
;
14484 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14485 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14486 type
= create_string_type (NULL
, char_type
, range_type
);
14488 return set_die_type (die
, type
, cu
);
14491 /* Assuming that DIE corresponds to a function, returns nonzero
14492 if the function is prototyped. */
14495 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14497 struct attribute
*attr
;
14499 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14500 if (attr
&& (DW_UNSND (attr
) != 0))
14503 /* The DWARF standard implies that the DW_AT_prototyped attribute
14504 is only meaninful for C, but the concept also extends to other
14505 languages that allow unprototyped functions (Eg: Objective C).
14506 For all other languages, assume that functions are always
14508 if (cu
->language
!= language_c
14509 && cu
->language
!= language_objc
14510 && cu
->language
!= language_opencl
)
14513 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14514 prototyped and unprototyped functions; default to prototyped,
14515 since that is more common in modern code (and RealView warns
14516 about unprototyped functions). */
14517 if (producer_is_realview (cu
->producer
))
14523 /* Handle DIES due to C code like:
14527 int (*funcp)(int a, long l);
14531 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14533 static struct type
*
14534 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14536 struct objfile
*objfile
= cu
->objfile
;
14537 struct type
*type
; /* Type that this function returns. */
14538 struct type
*ftype
; /* Function that returns above type. */
14539 struct attribute
*attr
;
14541 type
= die_type (die
, cu
);
14543 /* The die_type call above may have already set the type for this DIE. */
14544 ftype
= get_die_type (die
, cu
);
14548 ftype
= lookup_function_type (type
);
14550 if (prototyped_function_p (die
, cu
))
14551 TYPE_PROTOTYPED (ftype
) = 1;
14553 /* Store the calling convention in the type if it's available in
14554 the subroutine die. Otherwise set the calling convention to
14555 the default value DW_CC_normal. */
14556 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14558 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14559 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14560 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14562 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14564 /* Record whether the function returns normally to its caller or not
14565 if the DWARF producer set that information. */
14566 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14567 if (attr
&& (DW_UNSND (attr
) != 0))
14568 TYPE_NO_RETURN (ftype
) = 1;
14570 /* We need to add the subroutine type to the die immediately so
14571 we don't infinitely recurse when dealing with parameters
14572 declared as the same subroutine type. */
14573 set_die_type (die
, ftype
, cu
);
14575 if (die
->child
!= NULL
)
14577 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14578 struct die_info
*child_die
;
14579 int nparams
, iparams
;
14581 /* Count the number of parameters.
14582 FIXME: GDB currently ignores vararg functions, but knows about
14583 vararg member functions. */
14585 child_die
= die
->child
;
14586 while (child_die
&& child_die
->tag
)
14588 if (child_die
->tag
== DW_TAG_formal_parameter
)
14590 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14591 TYPE_VARARGS (ftype
) = 1;
14592 child_die
= sibling_die (child_die
);
14595 /* Allocate storage for parameters and fill them in. */
14596 TYPE_NFIELDS (ftype
) = nparams
;
14597 TYPE_FIELDS (ftype
) = (struct field
*)
14598 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14600 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14601 even if we error out during the parameters reading below. */
14602 for (iparams
= 0; iparams
< nparams
; iparams
++)
14603 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14606 child_die
= die
->child
;
14607 while (child_die
&& child_die
->tag
)
14609 if (child_die
->tag
== DW_TAG_formal_parameter
)
14611 struct type
*arg_type
;
14613 /* DWARF version 2 has no clean way to discern C++
14614 static and non-static member functions. G++ helps
14615 GDB by marking the first parameter for non-static
14616 member functions (which is the this pointer) as
14617 artificial. We pass this information to
14618 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14620 DWARF version 3 added DW_AT_object_pointer, which GCC
14621 4.5 does not yet generate. */
14622 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14624 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14627 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14629 /* GCC/43521: In java, the formal parameter
14630 "this" is sometimes not marked with DW_AT_artificial. */
14631 if (cu
->language
== language_java
)
14633 const char *name
= dwarf2_name (child_die
, cu
);
14635 if (name
&& !strcmp (name
, "this"))
14636 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14639 arg_type
= die_type (child_die
, cu
);
14641 /* RealView does not mark THIS as const, which the testsuite
14642 expects. GCC marks THIS as const in method definitions,
14643 but not in the class specifications (GCC PR 43053). */
14644 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14645 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14648 struct dwarf2_cu
*arg_cu
= cu
;
14649 const char *name
= dwarf2_name (child_die
, cu
);
14651 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14654 /* If the compiler emits this, use it. */
14655 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14658 else if (name
&& strcmp (name
, "this") == 0)
14659 /* Function definitions will have the argument names. */
14661 else if (name
== NULL
&& iparams
== 0)
14662 /* Declarations may not have the names, so like
14663 elsewhere in GDB, assume an artificial first
14664 argument is "this". */
14668 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14672 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14675 child_die
= sibling_die (child_die
);
14682 static struct type
*
14683 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14685 struct objfile
*objfile
= cu
->objfile
;
14686 const char *name
= NULL
;
14687 struct type
*this_type
, *target_type
;
14689 name
= dwarf2_full_name (NULL
, die
, cu
);
14690 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14691 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14692 TYPE_NAME (this_type
) = name
;
14693 set_die_type (die
, this_type
, cu
);
14694 target_type
= die_type (die
, cu
);
14695 if (target_type
!= this_type
)
14696 TYPE_TARGET_TYPE (this_type
) = target_type
;
14699 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14700 spec and cause infinite loops in GDB. */
14701 complaint (&symfile_complaints
,
14702 _("Self-referential DW_TAG_typedef "
14703 "- DIE at 0x%x [in module %s]"),
14704 die
->offset
.sect_off
, objfile_name (objfile
));
14705 TYPE_TARGET_TYPE (this_type
) = NULL
;
14710 /* Find a representation of a given base type and install
14711 it in the TYPE field of the die. */
14713 static struct type
*
14714 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14716 struct objfile
*objfile
= cu
->objfile
;
14718 struct attribute
*attr
;
14719 int encoding
= 0, size
= 0;
14721 enum type_code code
= TYPE_CODE_INT
;
14722 int type_flags
= 0;
14723 struct type
*target_type
= NULL
;
14725 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14728 encoding
= DW_UNSND (attr
);
14730 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14733 size
= DW_UNSND (attr
);
14735 name
= dwarf2_name (die
, cu
);
14738 complaint (&symfile_complaints
,
14739 _("DW_AT_name missing from DW_TAG_base_type"));
14744 case DW_ATE_address
:
14745 /* Turn DW_ATE_address into a void * pointer. */
14746 code
= TYPE_CODE_PTR
;
14747 type_flags
|= TYPE_FLAG_UNSIGNED
;
14748 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14750 case DW_ATE_boolean
:
14751 code
= TYPE_CODE_BOOL
;
14752 type_flags
|= TYPE_FLAG_UNSIGNED
;
14754 case DW_ATE_complex_float
:
14755 code
= TYPE_CODE_COMPLEX
;
14756 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14758 case DW_ATE_decimal_float
:
14759 code
= TYPE_CODE_DECFLOAT
;
14762 code
= TYPE_CODE_FLT
;
14764 case DW_ATE_signed
:
14766 case DW_ATE_unsigned
:
14767 type_flags
|= TYPE_FLAG_UNSIGNED
;
14768 if (cu
->language
== language_fortran
14770 && startswith (name
, "character("))
14771 code
= TYPE_CODE_CHAR
;
14773 case DW_ATE_signed_char
:
14774 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14775 || cu
->language
== language_pascal
14776 || cu
->language
== language_fortran
)
14777 code
= TYPE_CODE_CHAR
;
14779 case DW_ATE_unsigned_char
:
14780 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14781 || cu
->language
== language_pascal
14782 || cu
->language
== language_fortran
)
14783 code
= TYPE_CODE_CHAR
;
14784 type_flags
|= TYPE_FLAG_UNSIGNED
;
14787 /* We just treat this as an integer and then recognize the
14788 type by name elsewhere. */
14792 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14793 dwarf_type_encoding_name (encoding
));
14797 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14798 TYPE_NAME (type
) = name
;
14799 TYPE_TARGET_TYPE (type
) = target_type
;
14801 if (name
&& strcmp (name
, "char") == 0)
14802 TYPE_NOSIGN (type
) = 1;
14804 return set_die_type (die
, type
, cu
);
14807 /* Parse dwarf attribute if it's a block, reference or constant and put the
14808 resulting value of the attribute into struct bound_prop.
14809 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14812 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14813 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14815 struct dwarf2_property_baton
*baton
;
14816 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14818 if (attr
== NULL
|| prop
== NULL
)
14821 if (attr_form_is_block (attr
))
14823 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14824 baton
->referenced_type
= NULL
;
14825 baton
->locexpr
.per_cu
= cu
->per_cu
;
14826 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14827 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14828 prop
->data
.baton
= baton
;
14829 prop
->kind
= PROP_LOCEXPR
;
14830 gdb_assert (prop
->data
.baton
!= NULL
);
14832 else if (attr_form_is_ref (attr
))
14834 struct dwarf2_cu
*target_cu
= cu
;
14835 struct die_info
*target_die
;
14836 struct attribute
*target_attr
;
14838 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14839 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14840 if (target_attr
== NULL
)
14841 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14843 if (target_attr
== NULL
)
14846 switch (target_attr
->name
)
14848 case DW_AT_location
:
14849 if (attr_form_is_section_offset (target_attr
))
14851 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14852 baton
->referenced_type
= die_type (target_die
, target_cu
);
14853 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14854 prop
->data
.baton
= baton
;
14855 prop
->kind
= PROP_LOCLIST
;
14856 gdb_assert (prop
->data
.baton
!= NULL
);
14858 else if (attr_form_is_block (target_attr
))
14860 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14861 baton
->referenced_type
= die_type (target_die
, target_cu
);
14862 baton
->locexpr
.per_cu
= cu
->per_cu
;
14863 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14864 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14865 prop
->data
.baton
= baton
;
14866 prop
->kind
= PROP_LOCEXPR
;
14867 gdb_assert (prop
->data
.baton
!= NULL
);
14871 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14872 "dynamic property");
14876 case DW_AT_data_member_location
:
14880 if (!handle_data_member_location (target_die
, target_cu
,
14884 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14885 baton
->referenced_type
= read_type_die (target_die
->parent
,
14887 baton
->offset_info
.offset
= offset
;
14888 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14889 prop
->data
.baton
= baton
;
14890 prop
->kind
= PROP_ADDR_OFFSET
;
14895 else if (attr_form_is_constant (attr
))
14897 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14898 prop
->kind
= PROP_CONST
;
14902 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14903 dwarf2_name (die
, cu
));
14910 /* Read the given DW_AT_subrange DIE. */
14912 static struct type
*
14913 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14915 struct type
*base_type
, *orig_base_type
;
14916 struct type
*range_type
;
14917 struct attribute
*attr
;
14918 struct dynamic_prop low
, high
;
14919 int low_default_is_valid
;
14920 int high_bound_is_count
= 0;
14922 LONGEST negative_mask
;
14924 orig_base_type
= die_type (die
, cu
);
14925 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14926 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14927 creating the range type, but we use the result of check_typedef
14928 when examining properties of the type. */
14929 base_type
= check_typedef (orig_base_type
);
14931 /* The die_type call above may have already set the type for this DIE. */
14932 range_type
= get_die_type (die
, cu
);
14936 low
.kind
= PROP_CONST
;
14937 high
.kind
= PROP_CONST
;
14938 high
.data
.const_val
= 0;
14940 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14941 omitting DW_AT_lower_bound. */
14942 switch (cu
->language
)
14945 case language_cplus
:
14946 low
.data
.const_val
= 0;
14947 low_default_is_valid
= 1;
14949 case language_fortran
:
14950 low
.data
.const_val
= 1;
14951 low_default_is_valid
= 1;
14954 case language_java
:
14955 case language_objc
:
14956 low
.data
.const_val
= 0;
14957 low_default_is_valid
= (cu
->header
.version
>= 4);
14961 case language_pascal
:
14962 low
.data
.const_val
= 1;
14963 low_default_is_valid
= (cu
->header
.version
>= 4);
14966 low
.data
.const_val
= 0;
14967 low_default_is_valid
= 0;
14971 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14973 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14974 else if (!low_default_is_valid
)
14975 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14976 "- DIE at 0x%x [in module %s]"),
14977 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14979 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14980 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14982 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14983 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14985 /* If bounds are constant do the final calculation here. */
14986 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14987 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14989 high_bound_is_count
= 1;
14993 /* Dwarf-2 specifications explicitly allows to create subrange types
14994 without specifying a base type.
14995 In that case, the base type must be set to the type of
14996 the lower bound, upper bound or count, in that order, if any of these
14997 three attributes references an object that has a type.
14998 If no base type is found, the Dwarf-2 specifications say that
14999 a signed integer type of size equal to the size of an address should
15001 For the following C code: `extern char gdb_int [];'
15002 GCC produces an empty range DIE.
15003 FIXME: muller/2010-05-28: Possible references to object for low bound,
15004 high bound or count are not yet handled by this code. */
15005 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15007 struct objfile
*objfile
= cu
->objfile
;
15008 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15009 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15010 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15012 /* Test "int", "long int", and "long long int" objfile types,
15013 and select the first one having a size above or equal to the
15014 architecture address size. */
15015 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15016 base_type
= int_type
;
15019 int_type
= objfile_type (objfile
)->builtin_long
;
15020 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15021 base_type
= int_type
;
15024 int_type
= objfile_type (objfile
)->builtin_long_long
;
15025 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15026 base_type
= int_type
;
15031 /* Normally, the DWARF producers are expected to use a signed
15032 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15033 But this is unfortunately not always the case, as witnessed
15034 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15035 is used instead. To work around that ambiguity, we treat
15036 the bounds as signed, and thus sign-extend their values, when
15037 the base type is signed. */
15039 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
15040 if (low
.kind
== PROP_CONST
15041 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15042 low
.data
.const_val
|= negative_mask
;
15043 if (high
.kind
== PROP_CONST
15044 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15045 high
.data
.const_val
|= negative_mask
;
15047 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15049 if (high_bound_is_count
)
15050 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15052 /* Ada expects an empty array on no boundary attributes. */
15053 if (attr
== NULL
&& cu
->language
!= language_ada
)
15054 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15056 name
= dwarf2_name (die
, cu
);
15058 TYPE_NAME (range_type
) = name
;
15060 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15062 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15064 set_die_type (die
, range_type
, cu
);
15066 /* set_die_type should be already done. */
15067 set_descriptive_type (range_type
, die
, cu
);
15072 static struct type
*
15073 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15077 /* For now, we only support the C meaning of an unspecified type: void. */
15079 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15080 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15082 return set_die_type (die
, type
, cu
);
15085 /* Read a single die and all its descendents. Set the die's sibling
15086 field to NULL; set other fields in the die correctly, and set all
15087 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15088 location of the info_ptr after reading all of those dies. PARENT
15089 is the parent of the die in question. */
15091 static struct die_info
*
15092 read_die_and_children (const struct die_reader_specs
*reader
,
15093 const gdb_byte
*info_ptr
,
15094 const gdb_byte
**new_info_ptr
,
15095 struct die_info
*parent
)
15097 struct die_info
*die
;
15098 const gdb_byte
*cur_ptr
;
15101 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15104 *new_info_ptr
= cur_ptr
;
15107 store_in_ref_table (die
, reader
->cu
);
15110 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15114 *new_info_ptr
= cur_ptr
;
15117 die
->sibling
= NULL
;
15118 die
->parent
= parent
;
15122 /* Read a die, all of its descendents, and all of its siblings; set
15123 all of the fields of all of the dies correctly. Arguments are as
15124 in read_die_and_children. */
15126 static struct die_info
*
15127 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15128 const gdb_byte
*info_ptr
,
15129 const gdb_byte
**new_info_ptr
,
15130 struct die_info
*parent
)
15132 struct die_info
*first_die
, *last_sibling
;
15133 const gdb_byte
*cur_ptr
;
15135 cur_ptr
= info_ptr
;
15136 first_die
= last_sibling
= NULL
;
15140 struct die_info
*die
15141 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15145 *new_info_ptr
= cur_ptr
;
15152 last_sibling
->sibling
= die
;
15154 last_sibling
= die
;
15158 /* Read a die, all of its descendents, and all of its siblings; set
15159 all of the fields of all of the dies correctly. Arguments are as
15160 in read_die_and_children.
15161 This the main entry point for reading a DIE and all its children. */
15163 static struct die_info
*
15164 read_die_and_siblings (const struct die_reader_specs
*reader
,
15165 const gdb_byte
*info_ptr
,
15166 const gdb_byte
**new_info_ptr
,
15167 struct die_info
*parent
)
15169 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15170 new_info_ptr
, parent
);
15172 if (dwarf_die_debug
)
15174 fprintf_unfiltered (gdb_stdlog
,
15175 "Read die from %s@0x%x of %s:\n",
15176 get_section_name (reader
->die_section
),
15177 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15178 bfd_get_filename (reader
->abfd
));
15179 dump_die (die
, dwarf_die_debug
);
15185 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15187 The caller is responsible for filling in the extra attributes
15188 and updating (*DIEP)->num_attrs.
15189 Set DIEP to point to a newly allocated die with its information,
15190 except for its child, sibling, and parent fields.
15191 Set HAS_CHILDREN to tell whether the die has children or not. */
15193 static const gdb_byte
*
15194 read_full_die_1 (const struct die_reader_specs
*reader
,
15195 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15196 int *has_children
, int num_extra_attrs
)
15198 unsigned int abbrev_number
, bytes_read
, i
;
15199 sect_offset offset
;
15200 struct abbrev_info
*abbrev
;
15201 struct die_info
*die
;
15202 struct dwarf2_cu
*cu
= reader
->cu
;
15203 bfd
*abfd
= reader
->abfd
;
15205 offset
.sect_off
= info_ptr
- reader
->buffer
;
15206 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15207 info_ptr
+= bytes_read
;
15208 if (!abbrev_number
)
15215 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15217 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15219 bfd_get_filename (abfd
));
15221 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15222 die
->offset
= offset
;
15223 die
->tag
= abbrev
->tag
;
15224 die
->abbrev
= abbrev_number
;
15226 /* Make the result usable.
15227 The caller needs to update num_attrs after adding the extra
15229 die
->num_attrs
= abbrev
->num_attrs
;
15231 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15232 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15236 *has_children
= abbrev
->has_children
;
15240 /* Read a die and all its attributes.
15241 Set DIEP to point to a newly allocated die with its information,
15242 except for its child, sibling, and parent fields.
15243 Set HAS_CHILDREN to tell whether the die has children or not. */
15245 static const gdb_byte
*
15246 read_full_die (const struct die_reader_specs
*reader
,
15247 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15250 const gdb_byte
*result
;
15252 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15254 if (dwarf_die_debug
)
15256 fprintf_unfiltered (gdb_stdlog
,
15257 "Read die from %s@0x%x of %s:\n",
15258 get_section_name (reader
->die_section
),
15259 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15260 bfd_get_filename (reader
->abfd
));
15261 dump_die (*diep
, dwarf_die_debug
);
15267 /* Abbreviation tables.
15269 In DWARF version 2, the description of the debugging information is
15270 stored in a separate .debug_abbrev section. Before we read any
15271 dies from a section we read in all abbreviations and install them
15272 in a hash table. */
15274 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15276 static struct abbrev_info
*
15277 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15279 struct abbrev_info
*abbrev
;
15281 abbrev
= (struct abbrev_info
*)
15282 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15283 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15287 /* Add an abbreviation to the table. */
15290 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15291 unsigned int abbrev_number
,
15292 struct abbrev_info
*abbrev
)
15294 unsigned int hash_number
;
15296 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15297 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15298 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15301 /* Look up an abbrev in the table.
15302 Returns NULL if the abbrev is not found. */
15304 static struct abbrev_info
*
15305 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15306 unsigned int abbrev_number
)
15308 unsigned int hash_number
;
15309 struct abbrev_info
*abbrev
;
15311 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15312 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15316 if (abbrev
->number
== abbrev_number
)
15318 abbrev
= abbrev
->next
;
15323 /* Read in an abbrev table. */
15325 static struct abbrev_table
*
15326 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15327 sect_offset offset
)
15329 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15330 bfd
*abfd
= get_section_bfd_owner (section
);
15331 struct abbrev_table
*abbrev_table
;
15332 const gdb_byte
*abbrev_ptr
;
15333 struct abbrev_info
*cur_abbrev
;
15334 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15335 unsigned int abbrev_form
;
15336 struct attr_abbrev
*cur_attrs
;
15337 unsigned int allocated_attrs
;
15339 abbrev_table
= XNEW (struct abbrev_table
);
15340 abbrev_table
->offset
= offset
;
15341 obstack_init (&abbrev_table
->abbrev_obstack
);
15342 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15344 * sizeof (struct abbrev_info
*)));
15345 memset (abbrev_table
->abbrevs
, 0,
15346 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15348 dwarf2_read_section (objfile
, section
);
15349 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15350 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15351 abbrev_ptr
+= bytes_read
;
15353 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15354 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15356 /* Loop until we reach an abbrev number of 0. */
15357 while (abbrev_number
)
15359 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15361 /* read in abbrev header */
15362 cur_abbrev
->number
= abbrev_number
;
15364 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15365 abbrev_ptr
+= bytes_read
;
15366 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15369 /* now read in declarations */
15370 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15371 abbrev_ptr
+= bytes_read
;
15372 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15373 abbrev_ptr
+= bytes_read
;
15374 while (abbrev_name
)
15376 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15378 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15380 = xrealloc (cur_attrs
, (allocated_attrs
15381 * sizeof (struct attr_abbrev
)));
15384 cur_attrs
[cur_abbrev
->num_attrs
].name
15385 = (enum dwarf_attribute
) abbrev_name
;
15386 cur_attrs
[cur_abbrev
->num_attrs
++].form
15387 = (enum dwarf_form
) abbrev_form
;
15388 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15389 abbrev_ptr
+= bytes_read
;
15390 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15391 abbrev_ptr
+= bytes_read
;
15394 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15395 (cur_abbrev
->num_attrs
15396 * sizeof (struct attr_abbrev
)));
15397 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15398 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15400 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15402 /* Get next abbreviation.
15403 Under Irix6 the abbreviations for a compilation unit are not
15404 always properly terminated with an abbrev number of 0.
15405 Exit loop if we encounter an abbreviation which we have
15406 already read (which means we are about to read the abbreviations
15407 for the next compile unit) or if the end of the abbreviation
15408 table is reached. */
15409 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15411 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15412 abbrev_ptr
+= bytes_read
;
15413 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15418 return abbrev_table
;
15421 /* Free the resources held by ABBREV_TABLE. */
15424 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15426 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15427 xfree (abbrev_table
);
15430 /* Same as abbrev_table_free but as a cleanup.
15431 We pass in a pointer to the pointer to the table so that we can
15432 set the pointer to NULL when we're done. It also simplifies
15433 build_type_psymtabs_1. */
15436 abbrev_table_free_cleanup (void *table_ptr
)
15438 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15440 if (*abbrev_table_ptr
!= NULL
)
15441 abbrev_table_free (*abbrev_table_ptr
);
15442 *abbrev_table_ptr
= NULL
;
15445 /* Read the abbrev table for CU from ABBREV_SECTION. */
15448 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15449 struct dwarf2_section_info
*abbrev_section
)
15452 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15455 /* Release the memory used by the abbrev table for a compilation unit. */
15458 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15460 struct dwarf2_cu
*cu
= ptr_to_cu
;
15462 if (cu
->abbrev_table
!= NULL
)
15463 abbrev_table_free (cu
->abbrev_table
);
15464 /* Set this to NULL so that we SEGV if we try to read it later,
15465 and also because free_comp_unit verifies this is NULL. */
15466 cu
->abbrev_table
= NULL
;
15469 /* Returns nonzero if TAG represents a type that we might generate a partial
15473 is_type_tag_for_partial (int tag
)
15478 /* Some types that would be reasonable to generate partial symbols for,
15479 that we don't at present. */
15480 case DW_TAG_array_type
:
15481 case DW_TAG_file_type
:
15482 case DW_TAG_ptr_to_member_type
:
15483 case DW_TAG_set_type
:
15484 case DW_TAG_string_type
:
15485 case DW_TAG_subroutine_type
:
15487 case DW_TAG_base_type
:
15488 case DW_TAG_class_type
:
15489 case DW_TAG_interface_type
:
15490 case DW_TAG_enumeration_type
:
15491 case DW_TAG_structure_type
:
15492 case DW_TAG_subrange_type
:
15493 case DW_TAG_typedef
:
15494 case DW_TAG_union_type
:
15501 /* Load all DIEs that are interesting for partial symbols into memory. */
15503 static struct partial_die_info
*
15504 load_partial_dies (const struct die_reader_specs
*reader
,
15505 const gdb_byte
*info_ptr
, int building_psymtab
)
15507 struct dwarf2_cu
*cu
= reader
->cu
;
15508 struct objfile
*objfile
= cu
->objfile
;
15509 struct partial_die_info
*part_die
;
15510 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15511 struct abbrev_info
*abbrev
;
15512 unsigned int bytes_read
;
15513 unsigned int load_all
= 0;
15514 int nesting_level
= 1;
15519 gdb_assert (cu
->per_cu
!= NULL
);
15520 if (cu
->per_cu
->load_all_dies
)
15524 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15528 &cu
->comp_unit_obstack
,
15529 hashtab_obstack_allocate
,
15530 dummy_obstack_deallocate
);
15532 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15533 sizeof (struct partial_die_info
));
15537 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15539 /* A NULL abbrev means the end of a series of children. */
15540 if (abbrev
== NULL
)
15542 if (--nesting_level
== 0)
15544 /* PART_DIE was probably the last thing allocated on the
15545 comp_unit_obstack, so we could call obstack_free
15546 here. We don't do that because the waste is small,
15547 and will be cleaned up when we're done with this
15548 compilation unit. This way, we're also more robust
15549 against other users of the comp_unit_obstack. */
15552 info_ptr
+= bytes_read
;
15553 last_die
= parent_die
;
15554 parent_die
= parent_die
->die_parent
;
15558 /* Check for template arguments. We never save these; if
15559 they're seen, we just mark the parent, and go on our way. */
15560 if (parent_die
!= NULL
15561 && cu
->language
== language_cplus
15562 && (abbrev
->tag
== DW_TAG_template_type_param
15563 || abbrev
->tag
== DW_TAG_template_value_param
))
15565 parent_die
->has_template_arguments
= 1;
15569 /* We don't need a partial DIE for the template argument. */
15570 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15575 /* We only recurse into c++ subprograms looking for template arguments.
15576 Skip their other children. */
15578 && cu
->language
== language_cplus
15579 && parent_die
!= NULL
15580 && parent_die
->tag
== DW_TAG_subprogram
)
15582 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15586 /* Check whether this DIE is interesting enough to save. Normally
15587 we would not be interested in members here, but there may be
15588 later variables referencing them via DW_AT_specification (for
15589 static members). */
15591 && !is_type_tag_for_partial (abbrev
->tag
)
15592 && abbrev
->tag
!= DW_TAG_constant
15593 && abbrev
->tag
!= DW_TAG_enumerator
15594 && abbrev
->tag
!= DW_TAG_subprogram
15595 && abbrev
->tag
!= DW_TAG_lexical_block
15596 && abbrev
->tag
!= DW_TAG_variable
15597 && abbrev
->tag
!= DW_TAG_namespace
15598 && abbrev
->tag
!= DW_TAG_module
15599 && abbrev
->tag
!= DW_TAG_member
15600 && abbrev
->tag
!= DW_TAG_imported_unit
15601 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15603 /* Otherwise we skip to the next sibling, if any. */
15604 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15608 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15611 /* This two-pass algorithm for processing partial symbols has a
15612 high cost in cache pressure. Thus, handle some simple cases
15613 here which cover the majority of C partial symbols. DIEs
15614 which neither have specification tags in them, nor could have
15615 specification tags elsewhere pointing at them, can simply be
15616 processed and discarded.
15618 This segment is also optional; scan_partial_symbols and
15619 add_partial_symbol will handle these DIEs if we chain
15620 them in normally. When compilers which do not emit large
15621 quantities of duplicate debug information are more common,
15622 this code can probably be removed. */
15624 /* Any complete simple types at the top level (pretty much all
15625 of them, for a language without namespaces), can be processed
15627 if (parent_die
== NULL
15628 && part_die
->has_specification
== 0
15629 && part_die
->is_declaration
== 0
15630 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15631 || part_die
->tag
== DW_TAG_base_type
15632 || part_die
->tag
== DW_TAG_subrange_type
))
15634 if (building_psymtab
&& part_die
->name
!= NULL
)
15635 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15636 VAR_DOMAIN
, LOC_TYPEDEF
,
15637 &objfile
->static_psymbols
,
15638 0, cu
->language
, objfile
);
15639 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15643 /* The exception for DW_TAG_typedef with has_children above is
15644 a workaround of GCC PR debug/47510. In the case of this complaint
15645 type_name_no_tag_or_error will error on such types later.
15647 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15648 it could not find the child DIEs referenced later, this is checked
15649 above. In correct DWARF DW_TAG_typedef should have no children. */
15651 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15652 complaint (&symfile_complaints
,
15653 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15654 "- DIE at 0x%x [in module %s]"),
15655 part_die
->offset
.sect_off
, objfile_name (objfile
));
15657 /* If we're at the second level, and we're an enumerator, and
15658 our parent has no specification (meaning possibly lives in a
15659 namespace elsewhere), then we can add the partial symbol now
15660 instead of queueing it. */
15661 if (part_die
->tag
== DW_TAG_enumerator
15662 && parent_die
!= NULL
15663 && parent_die
->die_parent
== NULL
15664 && parent_die
->tag
== DW_TAG_enumeration_type
15665 && parent_die
->has_specification
== 0)
15667 if (part_die
->name
== NULL
)
15668 complaint (&symfile_complaints
,
15669 _("malformed enumerator DIE ignored"));
15670 else if (building_psymtab
)
15671 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15672 VAR_DOMAIN
, LOC_CONST
,
15673 (cu
->language
== language_cplus
15674 || cu
->language
== language_java
)
15675 ? &objfile
->global_psymbols
15676 : &objfile
->static_psymbols
,
15677 0, cu
->language
, objfile
);
15679 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15683 /* We'll save this DIE so link it in. */
15684 part_die
->die_parent
= parent_die
;
15685 part_die
->die_sibling
= NULL
;
15686 part_die
->die_child
= NULL
;
15688 if (last_die
&& last_die
== parent_die
)
15689 last_die
->die_child
= part_die
;
15691 last_die
->die_sibling
= part_die
;
15693 last_die
= part_die
;
15695 if (first_die
== NULL
)
15696 first_die
= part_die
;
15698 /* Maybe add the DIE to the hash table. Not all DIEs that we
15699 find interesting need to be in the hash table, because we
15700 also have the parent/sibling/child chains; only those that we
15701 might refer to by offset later during partial symbol reading.
15703 For now this means things that might have be the target of a
15704 DW_AT_specification, DW_AT_abstract_origin, or
15705 DW_AT_extension. DW_AT_extension will refer only to
15706 namespaces; DW_AT_abstract_origin refers to functions (and
15707 many things under the function DIE, but we do not recurse
15708 into function DIEs during partial symbol reading) and
15709 possibly variables as well; DW_AT_specification refers to
15710 declarations. Declarations ought to have the DW_AT_declaration
15711 flag. It happens that GCC forgets to put it in sometimes, but
15712 only for functions, not for types.
15714 Adding more things than necessary to the hash table is harmless
15715 except for the performance cost. Adding too few will result in
15716 wasted time in find_partial_die, when we reread the compilation
15717 unit with load_all_dies set. */
15720 || abbrev
->tag
== DW_TAG_constant
15721 || abbrev
->tag
== DW_TAG_subprogram
15722 || abbrev
->tag
== DW_TAG_variable
15723 || abbrev
->tag
== DW_TAG_namespace
15724 || part_die
->is_declaration
)
15728 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15729 part_die
->offset
.sect_off
, INSERT
);
15733 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15734 sizeof (struct partial_die_info
));
15736 /* For some DIEs we want to follow their children (if any). For C
15737 we have no reason to follow the children of structures; for other
15738 languages we have to, so that we can get at method physnames
15739 to infer fully qualified class names, for DW_AT_specification,
15740 and for C++ template arguments. For C++, we also look one level
15741 inside functions to find template arguments (if the name of the
15742 function does not already contain the template arguments).
15744 For Ada, we need to scan the children of subprograms and lexical
15745 blocks as well because Ada allows the definition of nested
15746 entities that could be interesting for the debugger, such as
15747 nested subprograms for instance. */
15748 if (last_die
->has_children
15750 || last_die
->tag
== DW_TAG_namespace
15751 || last_die
->tag
== DW_TAG_module
15752 || last_die
->tag
== DW_TAG_enumeration_type
15753 || (cu
->language
== language_cplus
15754 && last_die
->tag
== DW_TAG_subprogram
15755 && (last_die
->name
== NULL
15756 || strchr (last_die
->name
, '<') == NULL
))
15757 || (cu
->language
!= language_c
15758 && (last_die
->tag
== DW_TAG_class_type
15759 || last_die
->tag
== DW_TAG_interface_type
15760 || last_die
->tag
== DW_TAG_structure_type
15761 || last_die
->tag
== DW_TAG_union_type
))
15762 || (cu
->language
== language_ada
15763 && (last_die
->tag
== DW_TAG_subprogram
15764 || last_die
->tag
== DW_TAG_lexical_block
))))
15767 parent_die
= last_die
;
15771 /* Otherwise we skip to the next sibling, if any. */
15772 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15774 /* Back to the top, do it again. */
15778 /* Read a minimal amount of information into the minimal die structure. */
15780 static const gdb_byte
*
15781 read_partial_die (const struct die_reader_specs
*reader
,
15782 struct partial_die_info
*part_die
,
15783 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15784 const gdb_byte
*info_ptr
)
15786 struct dwarf2_cu
*cu
= reader
->cu
;
15787 struct objfile
*objfile
= cu
->objfile
;
15788 const gdb_byte
*buffer
= reader
->buffer
;
15790 struct attribute attr
;
15791 int has_low_pc_attr
= 0;
15792 int has_high_pc_attr
= 0;
15793 int high_pc_relative
= 0;
15795 memset (part_die
, 0, sizeof (struct partial_die_info
));
15797 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15799 info_ptr
+= abbrev_len
;
15801 if (abbrev
== NULL
)
15804 part_die
->tag
= abbrev
->tag
;
15805 part_die
->has_children
= abbrev
->has_children
;
15807 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15809 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15811 /* Store the data if it is of an attribute we want to keep in a
15812 partial symbol table. */
15816 switch (part_die
->tag
)
15818 case DW_TAG_compile_unit
:
15819 case DW_TAG_partial_unit
:
15820 case DW_TAG_type_unit
:
15821 /* Compilation units have a DW_AT_name that is a filename, not
15822 a source language identifier. */
15823 case DW_TAG_enumeration_type
:
15824 case DW_TAG_enumerator
:
15825 /* These tags always have simple identifiers already; no need
15826 to canonicalize them. */
15827 part_die
->name
= DW_STRING (&attr
);
15831 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15832 &objfile
->per_bfd
->storage_obstack
);
15836 case DW_AT_linkage_name
:
15837 case DW_AT_MIPS_linkage_name
:
15838 /* Note that both forms of linkage name might appear. We
15839 assume they will be the same, and we only store the last
15841 if (cu
->language
== language_ada
)
15842 part_die
->name
= DW_STRING (&attr
);
15843 part_die
->linkage_name
= DW_STRING (&attr
);
15846 has_low_pc_attr
= 1;
15847 part_die
->lowpc
= attr_value_as_address (&attr
);
15849 case DW_AT_high_pc
:
15850 has_high_pc_attr
= 1;
15851 part_die
->highpc
= attr_value_as_address (&attr
);
15852 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15853 high_pc_relative
= 1;
15855 case DW_AT_location
:
15856 /* Support the .debug_loc offsets. */
15857 if (attr_form_is_block (&attr
))
15859 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15861 else if (attr_form_is_section_offset (&attr
))
15863 dwarf2_complex_location_expr_complaint ();
15867 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15868 "partial symbol information");
15871 case DW_AT_external
:
15872 part_die
->is_external
= DW_UNSND (&attr
);
15874 case DW_AT_declaration
:
15875 part_die
->is_declaration
= DW_UNSND (&attr
);
15878 part_die
->has_type
= 1;
15880 case DW_AT_abstract_origin
:
15881 case DW_AT_specification
:
15882 case DW_AT_extension
:
15883 part_die
->has_specification
= 1;
15884 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15885 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15886 || cu
->per_cu
->is_dwz
);
15888 case DW_AT_sibling
:
15889 /* Ignore absolute siblings, they might point outside of
15890 the current compile unit. */
15891 if (attr
.form
== DW_FORM_ref_addr
)
15892 complaint (&symfile_complaints
,
15893 _("ignoring absolute DW_AT_sibling"));
15896 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15897 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15899 if (sibling_ptr
< info_ptr
)
15900 complaint (&symfile_complaints
,
15901 _("DW_AT_sibling points backwards"));
15902 else if (sibling_ptr
> reader
->buffer_end
)
15903 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15905 part_die
->sibling
= sibling_ptr
;
15908 case DW_AT_byte_size
:
15909 part_die
->has_byte_size
= 1;
15911 case DW_AT_const_value
:
15912 part_die
->has_const_value
= 1;
15914 case DW_AT_calling_convention
:
15915 /* DWARF doesn't provide a way to identify a program's source-level
15916 entry point. DW_AT_calling_convention attributes are only meant
15917 to describe functions' calling conventions.
15919 However, because it's a necessary piece of information in
15920 Fortran, and because DW_CC_program is the only piece of debugging
15921 information whose definition refers to a 'main program' at all,
15922 several compilers have begun marking Fortran main programs with
15923 DW_CC_program --- even when those functions use the standard
15924 calling conventions.
15926 So until DWARF specifies a way to provide this information and
15927 compilers pick up the new representation, we'll support this
15929 if (DW_UNSND (&attr
) == DW_CC_program
15930 && cu
->language
== language_fortran
)
15931 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15934 if (DW_UNSND (&attr
) == DW_INL_inlined
15935 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15936 part_die
->may_be_inlined
= 1;
15940 if (part_die
->tag
== DW_TAG_imported_unit
)
15942 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15943 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15944 || cu
->per_cu
->is_dwz
);
15953 if (high_pc_relative
)
15954 part_die
->highpc
+= part_die
->lowpc
;
15956 if (has_low_pc_attr
&& has_high_pc_attr
)
15958 /* When using the GNU linker, .gnu.linkonce. sections are used to
15959 eliminate duplicate copies of functions and vtables and such.
15960 The linker will arbitrarily choose one and discard the others.
15961 The AT_*_pc values for such functions refer to local labels in
15962 these sections. If the section from that file was discarded, the
15963 labels are not in the output, so the relocs get a value of 0.
15964 If this is a discarded function, mark the pc bounds as invalid,
15965 so that GDB will ignore it. */
15966 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15968 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15970 complaint (&symfile_complaints
,
15971 _("DW_AT_low_pc %s is zero "
15972 "for DIE at 0x%x [in module %s]"),
15973 paddress (gdbarch
, part_die
->lowpc
),
15974 part_die
->offset
.sect_off
, objfile_name (objfile
));
15976 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15977 else if (part_die
->lowpc
>= part_die
->highpc
)
15979 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15981 complaint (&symfile_complaints
,
15982 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15983 "for DIE at 0x%x [in module %s]"),
15984 paddress (gdbarch
, part_die
->lowpc
),
15985 paddress (gdbarch
, part_die
->highpc
),
15986 part_die
->offset
.sect_off
, objfile_name (objfile
));
15989 part_die
->has_pc_info
= 1;
15995 /* Find a cached partial DIE at OFFSET in CU. */
15997 static struct partial_die_info
*
15998 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16000 struct partial_die_info
*lookup_die
= NULL
;
16001 struct partial_die_info part_die
;
16003 part_die
.offset
= offset
;
16004 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
16010 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16011 except in the case of .debug_types DIEs which do not reference
16012 outside their CU (they do however referencing other types via
16013 DW_FORM_ref_sig8). */
16015 static struct partial_die_info
*
16016 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16018 struct objfile
*objfile
= cu
->objfile
;
16019 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16020 struct partial_die_info
*pd
= NULL
;
16022 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16023 && offset_in_cu_p (&cu
->header
, offset
))
16025 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16028 /* We missed recording what we needed.
16029 Load all dies and try again. */
16030 per_cu
= cu
->per_cu
;
16034 /* TUs don't reference other CUs/TUs (except via type signatures). */
16035 if (cu
->per_cu
->is_debug_types
)
16037 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16038 " external reference to offset 0x%lx [in module %s].\n"),
16039 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16040 bfd_get_filename (objfile
->obfd
));
16042 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16045 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16046 load_partial_comp_unit (per_cu
);
16048 per_cu
->cu
->last_used
= 0;
16049 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16052 /* If we didn't find it, and not all dies have been loaded,
16053 load them all and try again. */
16055 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16057 per_cu
->load_all_dies
= 1;
16059 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16060 THIS_CU->cu may already be in use. So we can't just free it and
16061 replace its DIEs with the ones we read in. Instead, we leave those
16062 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16063 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16065 load_partial_comp_unit (per_cu
);
16067 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16071 internal_error (__FILE__
, __LINE__
,
16072 _("could not find partial DIE 0x%x "
16073 "in cache [from module %s]\n"),
16074 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16078 /* See if we can figure out if the class lives in a namespace. We do
16079 this by looking for a member function; its demangled name will
16080 contain namespace info, if there is any. */
16083 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16084 struct dwarf2_cu
*cu
)
16086 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16087 what template types look like, because the demangler
16088 frequently doesn't give the same name as the debug info. We
16089 could fix this by only using the demangled name to get the
16090 prefix (but see comment in read_structure_type). */
16092 struct partial_die_info
*real_pdi
;
16093 struct partial_die_info
*child_pdi
;
16095 /* If this DIE (this DIE's specification, if any) has a parent, then
16096 we should not do this. We'll prepend the parent's fully qualified
16097 name when we create the partial symbol. */
16099 real_pdi
= struct_pdi
;
16100 while (real_pdi
->has_specification
)
16101 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16102 real_pdi
->spec_is_dwz
, cu
);
16104 if (real_pdi
->die_parent
!= NULL
)
16107 for (child_pdi
= struct_pdi
->die_child
;
16109 child_pdi
= child_pdi
->die_sibling
)
16111 if (child_pdi
->tag
== DW_TAG_subprogram
16112 && child_pdi
->linkage_name
!= NULL
)
16114 char *actual_class_name
16115 = language_class_name_from_physname (cu
->language_defn
,
16116 child_pdi
->linkage_name
);
16117 if (actual_class_name
!= NULL
)
16120 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16122 strlen (actual_class_name
));
16123 xfree (actual_class_name
);
16130 /* Adjust PART_DIE before generating a symbol for it. This function
16131 may set the is_external flag or change the DIE's name. */
16134 fixup_partial_die (struct partial_die_info
*part_die
,
16135 struct dwarf2_cu
*cu
)
16137 /* Once we've fixed up a die, there's no point in doing so again.
16138 This also avoids a memory leak if we were to call
16139 guess_partial_die_structure_name multiple times. */
16140 if (part_die
->fixup_called
)
16143 /* If we found a reference attribute and the DIE has no name, try
16144 to find a name in the referred to DIE. */
16146 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16148 struct partial_die_info
*spec_die
;
16150 spec_die
= find_partial_die (part_die
->spec_offset
,
16151 part_die
->spec_is_dwz
, cu
);
16153 fixup_partial_die (spec_die
, cu
);
16155 if (spec_die
->name
)
16157 part_die
->name
= spec_die
->name
;
16159 /* Copy DW_AT_external attribute if it is set. */
16160 if (spec_die
->is_external
)
16161 part_die
->is_external
= spec_die
->is_external
;
16165 /* Set default names for some unnamed DIEs. */
16167 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16168 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16170 /* If there is no parent die to provide a namespace, and there are
16171 children, see if we can determine the namespace from their linkage
16173 if (cu
->language
== language_cplus
16174 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16175 && part_die
->die_parent
== NULL
16176 && part_die
->has_children
16177 && (part_die
->tag
== DW_TAG_class_type
16178 || part_die
->tag
== DW_TAG_structure_type
16179 || part_die
->tag
== DW_TAG_union_type
))
16180 guess_partial_die_structure_name (part_die
, cu
);
16182 /* GCC might emit a nameless struct or union that has a linkage
16183 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16184 if (part_die
->name
== NULL
16185 && (part_die
->tag
== DW_TAG_class_type
16186 || part_die
->tag
== DW_TAG_interface_type
16187 || part_die
->tag
== DW_TAG_structure_type
16188 || part_die
->tag
== DW_TAG_union_type
)
16189 && part_die
->linkage_name
!= NULL
)
16193 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16198 /* Strip any leading namespaces/classes, keep only the base name.
16199 DW_AT_name for named DIEs does not contain the prefixes. */
16200 base
= strrchr (demangled
, ':');
16201 if (base
&& base
> demangled
&& base
[-1] == ':')
16207 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16208 base
, strlen (base
));
16213 part_die
->fixup_called
= 1;
16216 /* Read an attribute value described by an attribute form. */
16218 static const gdb_byte
*
16219 read_attribute_value (const struct die_reader_specs
*reader
,
16220 struct attribute
*attr
, unsigned form
,
16221 const gdb_byte
*info_ptr
)
16223 struct dwarf2_cu
*cu
= reader
->cu
;
16224 struct objfile
*objfile
= cu
->objfile
;
16225 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16226 bfd
*abfd
= reader
->abfd
;
16227 struct comp_unit_head
*cu_header
= &cu
->header
;
16228 unsigned int bytes_read
;
16229 struct dwarf_block
*blk
;
16231 attr
->form
= (enum dwarf_form
) form
;
16234 case DW_FORM_ref_addr
:
16235 if (cu
->header
.version
== 2)
16236 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16238 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16239 &cu
->header
, &bytes_read
);
16240 info_ptr
+= bytes_read
;
16242 case DW_FORM_GNU_ref_alt
:
16243 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16244 info_ptr
+= bytes_read
;
16247 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16248 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16249 info_ptr
+= bytes_read
;
16251 case DW_FORM_block2
:
16252 blk
= dwarf_alloc_block (cu
);
16253 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16255 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16256 info_ptr
+= blk
->size
;
16257 DW_BLOCK (attr
) = blk
;
16259 case DW_FORM_block4
:
16260 blk
= dwarf_alloc_block (cu
);
16261 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16263 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16264 info_ptr
+= blk
->size
;
16265 DW_BLOCK (attr
) = blk
;
16267 case DW_FORM_data2
:
16268 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16271 case DW_FORM_data4
:
16272 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16275 case DW_FORM_data8
:
16276 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16279 case DW_FORM_sec_offset
:
16280 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16281 info_ptr
+= bytes_read
;
16283 case DW_FORM_string
:
16284 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16285 DW_STRING_IS_CANONICAL (attr
) = 0;
16286 info_ptr
+= bytes_read
;
16289 if (!cu
->per_cu
->is_dwz
)
16291 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16293 DW_STRING_IS_CANONICAL (attr
) = 0;
16294 info_ptr
+= bytes_read
;
16298 case DW_FORM_GNU_strp_alt
:
16300 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16301 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16304 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16305 DW_STRING_IS_CANONICAL (attr
) = 0;
16306 info_ptr
+= bytes_read
;
16309 case DW_FORM_exprloc
:
16310 case DW_FORM_block
:
16311 blk
= dwarf_alloc_block (cu
);
16312 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16313 info_ptr
+= bytes_read
;
16314 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16315 info_ptr
+= blk
->size
;
16316 DW_BLOCK (attr
) = blk
;
16318 case DW_FORM_block1
:
16319 blk
= dwarf_alloc_block (cu
);
16320 blk
->size
= read_1_byte (abfd
, info_ptr
);
16322 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16323 info_ptr
+= blk
->size
;
16324 DW_BLOCK (attr
) = blk
;
16326 case DW_FORM_data1
:
16327 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16331 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16334 case DW_FORM_flag_present
:
16335 DW_UNSND (attr
) = 1;
16337 case DW_FORM_sdata
:
16338 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16339 info_ptr
+= bytes_read
;
16341 case DW_FORM_udata
:
16342 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16343 info_ptr
+= bytes_read
;
16346 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16347 + read_1_byte (abfd
, info_ptr
));
16351 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16352 + read_2_bytes (abfd
, info_ptr
));
16356 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16357 + read_4_bytes (abfd
, info_ptr
));
16361 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16362 + read_8_bytes (abfd
, info_ptr
));
16365 case DW_FORM_ref_sig8
:
16366 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16369 case DW_FORM_ref_udata
:
16370 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16371 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16372 info_ptr
+= bytes_read
;
16374 case DW_FORM_indirect
:
16375 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16376 info_ptr
+= bytes_read
;
16377 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16379 case DW_FORM_GNU_addr_index
:
16380 if (reader
->dwo_file
== NULL
)
16382 /* For now flag a hard error.
16383 Later we can turn this into a complaint. */
16384 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16385 dwarf_form_name (form
),
16386 bfd_get_filename (abfd
));
16388 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16389 info_ptr
+= bytes_read
;
16391 case DW_FORM_GNU_str_index
:
16392 if (reader
->dwo_file
== NULL
)
16394 /* For now flag a hard error.
16395 Later we can turn this into a complaint if warranted. */
16396 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16397 dwarf_form_name (form
),
16398 bfd_get_filename (abfd
));
16401 ULONGEST str_index
=
16402 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16404 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16405 DW_STRING_IS_CANONICAL (attr
) = 0;
16406 info_ptr
+= bytes_read
;
16410 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16411 dwarf_form_name (form
),
16412 bfd_get_filename (abfd
));
16416 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16417 attr
->form
= DW_FORM_GNU_ref_alt
;
16419 /* We have seen instances where the compiler tried to emit a byte
16420 size attribute of -1 which ended up being encoded as an unsigned
16421 0xffffffff. Although 0xffffffff is technically a valid size value,
16422 an object of this size seems pretty unlikely so we can relatively
16423 safely treat these cases as if the size attribute was invalid and
16424 treat them as zero by default. */
16425 if (attr
->name
== DW_AT_byte_size
16426 && form
== DW_FORM_data4
16427 && DW_UNSND (attr
) >= 0xffffffff)
16430 (&symfile_complaints
,
16431 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16432 hex_string (DW_UNSND (attr
)));
16433 DW_UNSND (attr
) = 0;
16439 /* Read an attribute described by an abbreviated attribute. */
16441 static const gdb_byte
*
16442 read_attribute (const struct die_reader_specs
*reader
,
16443 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16444 const gdb_byte
*info_ptr
)
16446 attr
->name
= abbrev
->name
;
16447 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16450 /* Read dwarf information from a buffer. */
16452 static unsigned int
16453 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16455 return bfd_get_8 (abfd
, buf
);
16459 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16461 return bfd_get_signed_8 (abfd
, buf
);
16464 static unsigned int
16465 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16467 return bfd_get_16 (abfd
, buf
);
16471 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16473 return bfd_get_signed_16 (abfd
, buf
);
16476 static unsigned int
16477 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16479 return bfd_get_32 (abfd
, buf
);
16483 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16485 return bfd_get_signed_32 (abfd
, buf
);
16489 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16491 return bfd_get_64 (abfd
, buf
);
16495 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16496 unsigned int *bytes_read
)
16498 struct comp_unit_head
*cu_header
= &cu
->header
;
16499 CORE_ADDR retval
= 0;
16501 if (cu_header
->signed_addr_p
)
16503 switch (cu_header
->addr_size
)
16506 retval
= bfd_get_signed_16 (abfd
, buf
);
16509 retval
= bfd_get_signed_32 (abfd
, buf
);
16512 retval
= bfd_get_signed_64 (abfd
, buf
);
16515 internal_error (__FILE__
, __LINE__
,
16516 _("read_address: bad switch, signed [in module %s]"),
16517 bfd_get_filename (abfd
));
16522 switch (cu_header
->addr_size
)
16525 retval
= bfd_get_16 (abfd
, buf
);
16528 retval
= bfd_get_32 (abfd
, buf
);
16531 retval
= bfd_get_64 (abfd
, buf
);
16534 internal_error (__FILE__
, __LINE__
,
16535 _("read_address: bad switch, "
16536 "unsigned [in module %s]"),
16537 bfd_get_filename (abfd
));
16541 *bytes_read
= cu_header
->addr_size
;
16545 /* Read the initial length from a section. The (draft) DWARF 3
16546 specification allows the initial length to take up either 4 bytes
16547 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16548 bytes describe the length and all offsets will be 8 bytes in length
16551 An older, non-standard 64-bit format is also handled by this
16552 function. The older format in question stores the initial length
16553 as an 8-byte quantity without an escape value. Lengths greater
16554 than 2^32 aren't very common which means that the initial 4 bytes
16555 is almost always zero. Since a length value of zero doesn't make
16556 sense for the 32-bit format, this initial zero can be considered to
16557 be an escape value which indicates the presence of the older 64-bit
16558 format. As written, the code can't detect (old format) lengths
16559 greater than 4GB. If it becomes necessary to handle lengths
16560 somewhat larger than 4GB, we could allow other small values (such
16561 as the non-sensical values of 1, 2, and 3) to also be used as
16562 escape values indicating the presence of the old format.
16564 The value returned via bytes_read should be used to increment the
16565 relevant pointer after calling read_initial_length().
16567 [ Note: read_initial_length() and read_offset() are based on the
16568 document entitled "DWARF Debugging Information Format", revision
16569 3, draft 8, dated November 19, 2001. This document was obtained
16572 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16574 This document is only a draft and is subject to change. (So beware.)
16576 Details regarding the older, non-standard 64-bit format were
16577 determined empirically by examining 64-bit ELF files produced by
16578 the SGI toolchain on an IRIX 6.5 machine.
16580 - Kevin, July 16, 2002
16584 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16586 LONGEST length
= bfd_get_32 (abfd
, buf
);
16588 if (length
== 0xffffffff)
16590 length
= bfd_get_64 (abfd
, buf
+ 4);
16593 else if (length
== 0)
16595 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16596 length
= bfd_get_64 (abfd
, buf
);
16607 /* Cover function for read_initial_length.
16608 Returns the length of the object at BUF, and stores the size of the
16609 initial length in *BYTES_READ and stores the size that offsets will be in
16611 If the initial length size is not equivalent to that specified in
16612 CU_HEADER then issue a complaint.
16613 This is useful when reading non-comp-unit headers. */
16616 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16617 const struct comp_unit_head
*cu_header
,
16618 unsigned int *bytes_read
,
16619 unsigned int *offset_size
)
16621 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16623 gdb_assert (cu_header
->initial_length_size
== 4
16624 || cu_header
->initial_length_size
== 8
16625 || cu_header
->initial_length_size
== 12);
16627 if (cu_header
->initial_length_size
!= *bytes_read
)
16628 complaint (&symfile_complaints
,
16629 _("intermixed 32-bit and 64-bit DWARF sections"));
16631 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16635 /* Read an offset from the data stream. The size of the offset is
16636 given by cu_header->offset_size. */
16639 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16640 const struct comp_unit_head
*cu_header
,
16641 unsigned int *bytes_read
)
16643 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16645 *bytes_read
= cu_header
->offset_size
;
16649 /* Read an offset from the data stream. */
16652 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16654 LONGEST retval
= 0;
16656 switch (offset_size
)
16659 retval
= bfd_get_32 (abfd
, buf
);
16662 retval
= bfd_get_64 (abfd
, buf
);
16665 internal_error (__FILE__
, __LINE__
,
16666 _("read_offset_1: bad switch [in module %s]"),
16667 bfd_get_filename (abfd
));
16673 static const gdb_byte
*
16674 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16676 /* If the size of a host char is 8 bits, we can return a pointer
16677 to the buffer, otherwise we have to copy the data to a buffer
16678 allocated on the temporary obstack. */
16679 gdb_assert (HOST_CHAR_BIT
== 8);
16683 static const char *
16684 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16685 unsigned int *bytes_read_ptr
)
16687 /* If the size of a host char is 8 bits, we can return a pointer
16688 to the string, otherwise we have to copy the string to a buffer
16689 allocated on the temporary obstack. */
16690 gdb_assert (HOST_CHAR_BIT
== 8);
16693 *bytes_read_ptr
= 1;
16696 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16697 return (const char *) buf
;
16700 static const char *
16701 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16703 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16704 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16705 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16706 bfd_get_filename (abfd
));
16707 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16708 error (_("DW_FORM_strp pointing outside of "
16709 ".debug_str section [in module %s]"),
16710 bfd_get_filename (abfd
));
16711 gdb_assert (HOST_CHAR_BIT
== 8);
16712 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16714 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16717 /* Read a string at offset STR_OFFSET in the .debug_str section from
16718 the .dwz file DWZ. Throw an error if the offset is too large. If
16719 the string consists of a single NUL byte, return NULL; otherwise
16720 return a pointer to the string. */
16722 static const char *
16723 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16725 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16727 if (dwz
->str
.buffer
== NULL
)
16728 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16729 "section [in module %s]"),
16730 bfd_get_filename (dwz
->dwz_bfd
));
16731 if (str_offset
>= dwz
->str
.size
)
16732 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16733 ".debug_str section [in module %s]"),
16734 bfd_get_filename (dwz
->dwz_bfd
));
16735 gdb_assert (HOST_CHAR_BIT
== 8);
16736 if (dwz
->str
.buffer
[str_offset
] == '\0')
16738 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16741 static const char *
16742 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16743 const struct comp_unit_head
*cu_header
,
16744 unsigned int *bytes_read_ptr
)
16746 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16748 return read_indirect_string_at_offset (abfd
, str_offset
);
16752 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16753 unsigned int *bytes_read_ptr
)
16756 unsigned int num_read
;
16758 unsigned char byte
;
16766 byte
= bfd_get_8 (abfd
, buf
);
16769 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16770 if ((byte
& 128) == 0)
16776 *bytes_read_ptr
= num_read
;
16781 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16782 unsigned int *bytes_read_ptr
)
16785 int i
, shift
, num_read
;
16786 unsigned char byte
;
16794 byte
= bfd_get_8 (abfd
, buf
);
16797 result
|= ((LONGEST
) (byte
& 127) << shift
);
16799 if ((byte
& 128) == 0)
16804 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16805 result
|= -(((LONGEST
) 1) << shift
);
16806 *bytes_read_ptr
= num_read
;
16810 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16811 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16812 ADDR_SIZE is the size of addresses from the CU header. */
16815 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16817 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16818 bfd
*abfd
= objfile
->obfd
;
16819 const gdb_byte
*info_ptr
;
16821 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16822 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16823 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16824 objfile_name (objfile
));
16825 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16826 error (_("DW_FORM_addr_index pointing outside of "
16827 ".debug_addr section [in module %s]"),
16828 objfile_name (objfile
));
16829 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16830 + addr_base
+ addr_index
* addr_size
);
16831 if (addr_size
== 4)
16832 return bfd_get_32 (abfd
, info_ptr
);
16834 return bfd_get_64 (abfd
, info_ptr
);
16837 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16840 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16842 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16845 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16848 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16849 unsigned int *bytes_read
)
16851 bfd
*abfd
= cu
->objfile
->obfd
;
16852 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16854 return read_addr_index (cu
, addr_index
);
16857 /* Data structure to pass results from dwarf2_read_addr_index_reader
16858 back to dwarf2_read_addr_index. */
16860 struct dwarf2_read_addr_index_data
16862 ULONGEST addr_base
;
16866 /* die_reader_func for dwarf2_read_addr_index. */
16869 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16870 const gdb_byte
*info_ptr
,
16871 struct die_info
*comp_unit_die
,
16875 struct dwarf2_cu
*cu
= reader
->cu
;
16876 struct dwarf2_read_addr_index_data
*aidata
=
16877 (struct dwarf2_read_addr_index_data
*) data
;
16879 aidata
->addr_base
= cu
->addr_base
;
16880 aidata
->addr_size
= cu
->header
.addr_size
;
16883 /* Given an index in .debug_addr, fetch the value.
16884 NOTE: This can be called during dwarf expression evaluation,
16885 long after the debug information has been read, and thus per_cu->cu
16886 may no longer exist. */
16889 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16890 unsigned int addr_index
)
16892 struct objfile
*objfile
= per_cu
->objfile
;
16893 struct dwarf2_cu
*cu
= per_cu
->cu
;
16894 ULONGEST addr_base
;
16897 /* This is intended to be called from outside this file. */
16898 dw2_setup (objfile
);
16900 /* We need addr_base and addr_size.
16901 If we don't have PER_CU->cu, we have to get it.
16902 Nasty, but the alternative is storing the needed info in PER_CU,
16903 which at this point doesn't seem justified: it's not clear how frequently
16904 it would get used and it would increase the size of every PER_CU.
16905 Entry points like dwarf2_per_cu_addr_size do a similar thing
16906 so we're not in uncharted territory here.
16907 Alas we need to be a bit more complicated as addr_base is contained
16910 We don't need to read the entire CU(/TU).
16911 We just need the header and top level die.
16913 IWBN to use the aging mechanism to let us lazily later discard the CU.
16914 For now we skip this optimization. */
16918 addr_base
= cu
->addr_base
;
16919 addr_size
= cu
->header
.addr_size
;
16923 struct dwarf2_read_addr_index_data aidata
;
16925 /* Note: We can't use init_cutu_and_read_dies_simple here,
16926 we need addr_base. */
16927 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16928 dwarf2_read_addr_index_reader
, &aidata
);
16929 addr_base
= aidata
.addr_base
;
16930 addr_size
= aidata
.addr_size
;
16933 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16936 /* Given a DW_FORM_GNU_str_index, fetch the string.
16937 This is only used by the Fission support. */
16939 static const char *
16940 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16942 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16943 const char *objf_name
= objfile_name (objfile
);
16944 bfd
*abfd
= objfile
->obfd
;
16945 struct dwarf2_cu
*cu
= reader
->cu
;
16946 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16947 struct dwarf2_section_info
*str_offsets_section
=
16948 &reader
->dwo_file
->sections
.str_offsets
;
16949 const gdb_byte
*info_ptr
;
16950 ULONGEST str_offset
;
16951 static const char form_name
[] = "DW_FORM_GNU_str_index";
16953 dwarf2_read_section (objfile
, str_section
);
16954 dwarf2_read_section (objfile
, str_offsets_section
);
16955 if (str_section
->buffer
== NULL
)
16956 error (_("%s used without .debug_str.dwo section"
16957 " in CU at offset 0x%lx [in module %s]"),
16958 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16959 if (str_offsets_section
->buffer
== NULL
)
16960 error (_("%s used without .debug_str_offsets.dwo section"
16961 " in CU at offset 0x%lx [in module %s]"),
16962 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16963 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16964 error (_("%s pointing outside of .debug_str_offsets.dwo"
16965 " section in CU at offset 0x%lx [in module %s]"),
16966 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16967 info_ptr
= (str_offsets_section
->buffer
16968 + str_index
* cu
->header
.offset_size
);
16969 if (cu
->header
.offset_size
== 4)
16970 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16972 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16973 if (str_offset
>= str_section
->size
)
16974 error (_("Offset from %s pointing outside of"
16975 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16976 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16977 return (const char *) (str_section
->buffer
+ str_offset
);
16980 /* Return the length of an LEB128 number in BUF. */
16983 leb128_size (const gdb_byte
*buf
)
16985 const gdb_byte
*begin
= buf
;
16991 if ((byte
& 128) == 0)
16992 return buf
- begin
;
16997 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17006 cu
->language
= language_c
;
17008 case DW_LANG_C_plus_plus
:
17009 case DW_LANG_C_plus_plus_11
:
17010 case DW_LANG_C_plus_plus_14
:
17011 cu
->language
= language_cplus
;
17014 cu
->language
= language_d
;
17016 case DW_LANG_Fortran77
:
17017 case DW_LANG_Fortran90
:
17018 case DW_LANG_Fortran95
:
17019 case DW_LANG_Fortran03
:
17020 case DW_LANG_Fortran08
:
17021 cu
->language
= language_fortran
;
17024 cu
->language
= language_go
;
17026 case DW_LANG_Mips_Assembler
:
17027 cu
->language
= language_asm
;
17030 cu
->language
= language_java
;
17032 case DW_LANG_Ada83
:
17033 case DW_LANG_Ada95
:
17034 cu
->language
= language_ada
;
17036 case DW_LANG_Modula2
:
17037 cu
->language
= language_m2
;
17039 case DW_LANG_Pascal83
:
17040 cu
->language
= language_pascal
;
17043 cu
->language
= language_objc
;
17045 case DW_LANG_Cobol74
:
17046 case DW_LANG_Cobol85
:
17048 cu
->language
= language_minimal
;
17051 cu
->language_defn
= language_def (cu
->language
);
17054 /* Return the named attribute or NULL if not there. */
17056 static struct attribute
*
17057 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17062 struct attribute
*spec
= NULL
;
17064 for (i
= 0; i
< die
->num_attrs
; ++i
)
17066 if (die
->attrs
[i
].name
== name
)
17067 return &die
->attrs
[i
];
17068 if (die
->attrs
[i
].name
== DW_AT_specification
17069 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17070 spec
= &die
->attrs
[i
];
17076 die
= follow_die_ref (die
, spec
, &cu
);
17082 /* Return the named attribute or NULL if not there,
17083 but do not follow DW_AT_specification, etc.
17084 This is for use in contexts where we're reading .debug_types dies.
17085 Following DW_AT_specification, DW_AT_abstract_origin will take us
17086 back up the chain, and we want to go down. */
17088 static struct attribute
*
17089 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17093 for (i
= 0; i
< die
->num_attrs
; ++i
)
17094 if (die
->attrs
[i
].name
== name
)
17095 return &die
->attrs
[i
];
17100 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17101 and holds a non-zero value. This function should only be used for
17102 DW_FORM_flag or DW_FORM_flag_present attributes. */
17105 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17107 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17109 return (attr
&& DW_UNSND (attr
));
17113 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17115 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17116 which value is non-zero. However, we have to be careful with
17117 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17118 (via dwarf2_flag_true_p) follows this attribute. So we may
17119 end up accidently finding a declaration attribute that belongs
17120 to a different DIE referenced by the specification attribute,
17121 even though the given DIE does not have a declaration attribute. */
17122 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17123 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17126 /* Return the die giving the specification for DIE, if there is
17127 one. *SPEC_CU is the CU containing DIE on input, and the CU
17128 containing the return value on output. If there is no
17129 specification, but there is an abstract origin, that is
17132 static struct die_info
*
17133 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17135 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17138 if (spec_attr
== NULL
)
17139 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17141 if (spec_attr
== NULL
)
17144 return follow_die_ref (die
, spec_attr
, spec_cu
);
17147 /* Free the line_header structure *LH, and any arrays and strings it
17149 NOTE: This is also used as a "cleanup" function. */
17152 free_line_header (struct line_header
*lh
)
17154 if (lh
->standard_opcode_lengths
)
17155 xfree (lh
->standard_opcode_lengths
);
17157 /* Remember that all the lh->file_names[i].name pointers are
17158 pointers into debug_line_buffer, and don't need to be freed. */
17159 if (lh
->file_names
)
17160 xfree (lh
->file_names
);
17162 /* Similarly for the include directory names. */
17163 if (lh
->include_dirs
)
17164 xfree (lh
->include_dirs
);
17169 /* Stub for free_line_header to match void * callback types. */
17172 free_line_header_voidp (void *arg
)
17174 struct line_header
*lh
= arg
;
17176 free_line_header (lh
);
17179 /* Add an entry to LH's include directory table. */
17182 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17184 if (dwarf_line_debug
>= 2)
17185 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17186 lh
->num_include_dirs
+ 1, include_dir
);
17188 /* Grow the array if necessary. */
17189 if (lh
->include_dirs_size
== 0)
17191 lh
->include_dirs_size
= 1; /* for testing */
17192 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17193 * sizeof (*lh
->include_dirs
));
17195 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17197 lh
->include_dirs_size
*= 2;
17198 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17199 (lh
->include_dirs_size
17200 * sizeof (*lh
->include_dirs
)));
17203 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17206 /* Add an entry to LH's file name table. */
17209 add_file_name (struct line_header
*lh
,
17211 unsigned int dir_index
,
17212 unsigned int mod_time
,
17213 unsigned int length
)
17215 struct file_entry
*fe
;
17217 if (dwarf_line_debug
>= 2)
17218 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17219 lh
->num_file_names
+ 1, name
);
17221 /* Grow the array if necessary. */
17222 if (lh
->file_names_size
== 0)
17224 lh
->file_names_size
= 1; /* for testing */
17225 lh
->file_names
= xmalloc (lh
->file_names_size
17226 * sizeof (*lh
->file_names
));
17228 else if (lh
->num_file_names
>= lh
->file_names_size
)
17230 lh
->file_names_size
*= 2;
17231 lh
->file_names
= xrealloc (lh
->file_names
,
17232 (lh
->file_names_size
17233 * sizeof (*lh
->file_names
)));
17236 fe
= &lh
->file_names
[lh
->num_file_names
++];
17238 fe
->dir_index
= dir_index
;
17239 fe
->mod_time
= mod_time
;
17240 fe
->length
= length
;
17241 fe
->included_p
= 0;
17245 /* A convenience function to find the proper .debug_line section for a CU. */
17247 static struct dwarf2_section_info
*
17248 get_debug_line_section (struct dwarf2_cu
*cu
)
17250 struct dwarf2_section_info
*section
;
17252 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17254 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17255 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17256 else if (cu
->per_cu
->is_dwz
)
17258 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17260 section
= &dwz
->line
;
17263 section
= &dwarf2_per_objfile
->line
;
17268 /* Read the statement program header starting at OFFSET in
17269 .debug_line, or .debug_line.dwo. Return a pointer
17270 to a struct line_header, allocated using xmalloc.
17271 Returns NULL if there is a problem reading the header, e.g., if it
17272 has a version we don't understand.
17274 NOTE: the strings in the include directory and file name tables of
17275 the returned object point into the dwarf line section buffer,
17276 and must not be freed. */
17278 static struct line_header
*
17279 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17281 struct cleanup
*back_to
;
17282 struct line_header
*lh
;
17283 const gdb_byte
*line_ptr
;
17284 unsigned int bytes_read
, offset_size
;
17286 const char *cur_dir
, *cur_file
;
17287 struct dwarf2_section_info
*section
;
17290 section
= get_debug_line_section (cu
);
17291 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17292 if (section
->buffer
== NULL
)
17294 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17295 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17297 complaint (&symfile_complaints
, _("missing .debug_line section"));
17301 /* We can't do this until we know the section is non-empty.
17302 Only then do we know we have such a section. */
17303 abfd
= get_section_bfd_owner (section
);
17305 /* Make sure that at least there's room for the total_length field.
17306 That could be 12 bytes long, but we're just going to fudge that. */
17307 if (offset
+ 4 >= section
->size
)
17309 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17313 lh
= xmalloc (sizeof (*lh
));
17314 memset (lh
, 0, sizeof (*lh
));
17315 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17318 lh
->offset
.sect_off
= offset
;
17319 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17321 line_ptr
= section
->buffer
+ offset
;
17323 /* Read in the header. */
17325 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17326 &bytes_read
, &offset_size
);
17327 line_ptr
+= bytes_read
;
17328 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17330 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17331 do_cleanups (back_to
);
17334 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17335 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17337 if (lh
->version
> 4)
17339 /* This is a version we don't understand. The format could have
17340 changed in ways we don't handle properly so just punt. */
17341 complaint (&symfile_complaints
,
17342 _("unsupported version in .debug_line section"));
17345 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17346 line_ptr
+= offset_size
;
17347 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17349 if (lh
->version
>= 4)
17351 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17355 lh
->maximum_ops_per_instruction
= 1;
17357 if (lh
->maximum_ops_per_instruction
== 0)
17359 lh
->maximum_ops_per_instruction
= 1;
17360 complaint (&symfile_complaints
,
17361 _("invalid maximum_ops_per_instruction "
17362 "in `.debug_line' section"));
17365 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17367 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17369 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17371 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17373 lh
->standard_opcode_lengths
17374 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17376 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17377 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17379 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17383 /* Read directory table. */
17384 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17386 line_ptr
+= bytes_read
;
17387 add_include_dir (lh
, cur_dir
);
17389 line_ptr
+= bytes_read
;
17391 /* Read file name table. */
17392 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17394 unsigned int dir_index
, mod_time
, length
;
17396 line_ptr
+= bytes_read
;
17397 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17398 line_ptr
+= bytes_read
;
17399 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17400 line_ptr
+= bytes_read
;
17401 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17402 line_ptr
+= bytes_read
;
17404 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17406 line_ptr
+= bytes_read
;
17407 lh
->statement_program_start
= line_ptr
;
17409 if (line_ptr
> (section
->buffer
+ section
->size
))
17410 complaint (&symfile_complaints
,
17411 _("line number info header doesn't "
17412 "fit in `.debug_line' section"));
17414 discard_cleanups (back_to
);
17418 /* Subroutine of dwarf_decode_lines to simplify it.
17419 Return the file name of the psymtab for included file FILE_INDEX
17420 in line header LH of PST.
17421 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17422 If space for the result is malloc'd, it will be freed by a cleanup.
17423 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17425 The function creates dangling cleanup registration. */
17427 static const char *
17428 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17429 const struct partial_symtab
*pst
,
17430 const char *comp_dir
)
17432 const struct file_entry fe
= lh
->file_names
[file_index
];
17433 const char *include_name
= fe
.name
;
17434 const char *include_name_to_compare
= include_name
;
17435 const char *dir_name
= NULL
;
17436 const char *pst_filename
;
17437 char *copied_name
= NULL
;
17440 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17441 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17443 if (!IS_ABSOLUTE_PATH (include_name
)
17444 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17446 /* Avoid creating a duplicate psymtab for PST.
17447 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17448 Before we do the comparison, however, we need to account
17449 for DIR_NAME and COMP_DIR.
17450 First prepend dir_name (if non-NULL). If we still don't
17451 have an absolute path prepend comp_dir (if non-NULL).
17452 However, the directory we record in the include-file's
17453 psymtab does not contain COMP_DIR (to match the
17454 corresponding symtab(s)).
17459 bash$ gcc -g ./hello.c
17460 include_name = "hello.c"
17462 DW_AT_comp_dir = comp_dir = "/tmp"
17463 DW_AT_name = "./hello.c"
17467 if (dir_name
!= NULL
)
17469 char *tem
= concat (dir_name
, SLASH_STRING
,
17470 include_name
, (char *)NULL
);
17472 make_cleanup (xfree
, tem
);
17473 include_name
= tem
;
17474 include_name_to_compare
= include_name
;
17476 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17478 char *tem
= concat (comp_dir
, SLASH_STRING
,
17479 include_name
, (char *)NULL
);
17481 make_cleanup (xfree
, tem
);
17482 include_name_to_compare
= tem
;
17486 pst_filename
= pst
->filename
;
17487 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17489 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17490 pst_filename
, (char *)NULL
);
17491 pst_filename
= copied_name
;
17494 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17496 if (copied_name
!= NULL
)
17497 xfree (copied_name
);
17501 return include_name
;
17504 /* State machine to track the state of the line number program. */
17508 /* These are part of the standard DWARF line number state machine. */
17510 unsigned char op_index
;
17515 unsigned int discriminator
;
17517 /* Additional bits of state we need to track. */
17519 /* The last file that we called dwarf2_start_subfile for.
17520 This is only used for TLLs. */
17521 unsigned int last_file
;
17522 /* The last file a line number was recorded for. */
17523 struct subfile
*last_subfile
;
17525 /* The function to call to record a line. */
17526 record_line_ftype
*record_line
;
17528 /* The last line number that was recorded, used to coalesce
17529 consecutive entries for the same line. This can happen, for
17530 example, when discriminators are present. PR 17276. */
17531 unsigned int last_line
;
17532 int line_has_non_zero_discriminator
;
17533 } lnp_state_machine
;
17535 /* There's a lot of static state to pass to dwarf_record_line.
17536 This keeps it all together. */
17541 struct gdbarch
*gdbarch
;
17543 /* The line number header. */
17544 struct line_header
*line_header
;
17546 /* Non-zero if we're recording lines.
17547 Otherwise we're building partial symtabs and are just interested in
17548 finding include files mentioned by the line number program. */
17549 int record_lines_p
;
17550 } lnp_reader_state
;
17552 /* Ignore this record_line request. */
17555 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17560 /* Return non-zero if we should add LINE to the line number table.
17561 LINE is the line to add, LAST_LINE is the last line that was added,
17562 LAST_SUBFILE is the subfile for LAST_LINE.
17563 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17564 had a non-zero discriminator.
17566 We have to be careful in the presence of discriminators.
17567 E.g., for this line:
17569 for (i = 0; i < 100000; i++);
17571 clang can emit four line number entries for that one line,
17572 each with a different discriminator.
17573 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17575 However, we want gdb to coalesce all four entries into one.
17576 Otherwise the user could stepi into the middle of the line and
17577 gdb would get confused about whether the pc really was in the
17578 middle of the line.
17580 Things are further complicated by the fact that two consecutive
17581 line number entries for the same line is a heuristic used by gcc
17582 to denote the end of the prologue. So we can't just discard duplicate
17583 entries, we have to be selective about it. The heuristic we use is
17584 that we only collapse consecutive entries for the same line if at least
17585 one of those entries has a non-zero discriminator. PR 17276.
17587 Note: Addresses in the line number state machine can never go backwards
17588 within one sequence, thus this coalescing is ok. */
17591 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17592 int line_has_non_zero_discriminator
,
17593 struct subfile
*last_subfile
)
17595 if (current_subfile
!= last_subfile
)
17597 if (line
!= last_line
)
17599 /* Same line for the same file that we've seen already.
17600 As a last check, for pr 17276, only record the line if the line
17601 has never had a non-zero discriminator. */
17602 if (!line_has_non_zero_discriminator
)
17607 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17608 in the line table of subfile SUBFILE. */
17611 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17612 unsigned int line
, CORE_ADDR address
,
17613 record_line_ftype p_record_line
)
17615 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17617 if (dwarf_line_debug
)
17619 fprintf_unfiltered (gdb_stdlog
,
17620 "Recording line %u, file %s, address %s\n",
17621 line
, lbasename (subfile
->name
),
17622 paddress (gdbarch
, address
));
17625 (*p_record_line
) (subfile
, line
, addr
);
17628 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17629 Mark the end of a set of line number records.
17630 The arguments are the same as for dwarf_record_line_1.
17631 If SUBFILE is NULL the request is ignored. */
17634 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17635 CORE_ADDR address
, record_line_ftype p_record_line
)
17637 if (subfile
== NULL
)
17640 if (dwarf_line_debug
)
17642 fprintf_unfiltered (gdb_stdlog
,
17643 "Finishing current line, file %s, address %s\n",
17644 lbasename (subfile
->name
),
17645 paddress (gdbarch
, address
));
17648 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17651 /* Record the line in STATE.
17652 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17655 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17658 const struct line_header
*lh
= reader
->line_header
;
17659 unsigned int file
, line
, discriminator
;
17662 file
= state
->file
;
17663 line
= state
->line
;
17664 is_stmt
= state
->is_stmt
;
17665 discriminator
= state
->discriminator
;
17667 if (dwarf_line_debug
)
17669 fprintf_unfiltered (gdb_stdlog
,
17670 "Processing actual line %u: file %u,"
17671 " address %s, is_stmt %u, discrim %u\n",
17673 paddress (reader
->gdbarch
, state
->address
),
17674 is_stmt
, discriminator
);
17677 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17678 dwarf2_debug_line_missing_file_complaint ();
17679 /* For now we ignore lines not starting on an instruction boundary.
17680 But not when processing end_sequence for compatibility with the
17681 previous version of the code. */
17682 else if (state
->op_index
== 0 || end_sequence
)
17684 lh
->file_names
[file
- 1].included_p
= 1;
17685 if (reader
->record_lines_p
&& is_stmt
)
17687 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17689 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17690 state
->address
, state
->record_line
);
17695 if (dwarf_record_line_p (line
, state
->last_line
,
17696 state
->line_has_non_zero_discriminator
,
17697 state
->last_subfile
))
17699 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17700 line
, state
->address
,
17701 state
->record_line
);
17703 state
->last_subfile
= current_subfile
;
17704 state
->last_line
= line
;
17710 /* Initialize STATE for the start of a line number program. */
17713 init_lnp_state_machine (lnp_state_machine
*state
,
17714 const lnp_reader_state
*reader
)
17716 memset (state
, 0, sizeof (*state
));
17718 /* Just starting, there is no "last file". */
17719 state
->last_file
= 0;
17720 state
->last_subfile
= NULL
;
17722 state
->record_line
= record_line
;
17724 state
->last_line
= 0;
17725 state
->line_has_non_zero_discriminator
= 0;
17727 /* Initialize these according to the DWARF spec. */
17728 state
->op_index
= 0;
17731 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17732 was a line entry for it so that the backend has a chance to adjust it
17733 and also record it in case it needs it. This is currently used by MIPS
17734 code, cf. `mips_adjust_dwarf2_line'. */
17735 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17736 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17737 state
->discriminator
= 0;
17740 /* Check address and if invalid nop-out the rest of the lines in this
17744 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17745 const gdb_byte
*line_ptr
,
17746 CORE_ADDR lowpc
, CORE_ADDR address
)
17748 /* If address < lowpc then it's not a usable value, it's outside the
17749 pc range of the CU. However, we restrict the test to only address
17750 values of zero to preserve GDB's previous behaviour which is to
17751 handle the specific case of a function being GC'd by the linker. */
17753 if (address
== 0 && address
< lowpc
)
17755 /* This line table is for a function which has been
17756 GCd by the linker. Ignore it. PR gdb/12528 */
17758 struct objfile
*objfile
= cu
->objfile
;
17759 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17761 complaint (&symfile_complaints
,
17762 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17763 line_offset
, objfile_name (objfile
));
17764 state
->record_line
= noop_record_line
;
17765 /* Note: sm.record_line is left as noop_record_line
17766 until we see DW_LNE_end_sequence. */
17770 /* Subroutine of dwarf_decode_lines to simplify it.
17771 Process the line number information in LH.
17772 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17773 program in order to set included_p for every referenced header. */
17776 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17777 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17779 const gdb_byte
*line_ptr
, *extended_end
;
17780 const gdb_byte
*line_end
;
17781 unsigned int bytes_read
, extended_len
;
17782 unsigned char op_code
, extended_op
;
17783 CORE_ADDR baseaddr
;
17784 struct objfile
*objfile
= cu
->objfile
;
17785 bfd
*abfd
= objfile
->obfd
;
17786 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17787 /* Non-zero if we're recording line info (as opposed to building partial
17789 int record_lines_p
= !decode_for_pst_p
;
17790 /* A collection of things we need to pass to dwarf_record_line. */
17791 lnp_reader_state reader_state
;
17793 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17795 line_ptr
= lh
->statement_program_start
;
17796 line_end
= lh
->statement_program_end
;
17798 reader_state
.gdbarch
= gdbarch
;
17799 reader_state
.line_header
= lh
;
17800 reader_state
.record_lines_p
= record_lines_p
;
17802 /* Read the statement sequences until there's nothing left. */
17803 while (line_ptr
< line_end
)
17805 /* The DWARF line number program state machine. */
17806 lnp_state_machine state_machine
;
17807 int end_sequence
= 0;
17809 /* Reset the state machine at the start of each sequence. */
17810 init_lnp_state_machine (&state_machine
, &reader_state
);
17812 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17814 /* Start a subfile for the current file of the state machine. */
17815 /* lh->include_dirs and lh->file_names are 0-based, but the
17816 directory and file name numbers in the statement program
17818 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17819 const char *dir
= NULL
;
17821 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17822 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17824 dwarf2_start_subfile (fe
->name
, dir
);
17827 /* Decode the table. */
17828 while (line_ptr
< line_end
&& !end_sequence
)
17830 op_code
= read_1_byte (abfd
, line_ptr
);
17833 if (op_code
>= lh
->opcode_base
)
17835 /* Special opcode. */
17836 unsigned char adj_opcode
;
17837 CORE_ADDR addr_adj
;
17840 adj_opcode
= op_code
- lh
->opcode_base
;
17841 addr_adj
= (((state_machine
.op_index
17842 + (adj_opcode
/ lh
->line_range
))
17843 / lh
->maximum_ops_per_instruction
)
17844 * lh
->minimum_instruction_length
);
17845 state_machine
.address
17846 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17847 state_machine
.op_index
= ((state_machine
.op_index
17848 + (adj_opcode
/ lh
->line_range
))
17849 % lh
->maximum_ops_per_instruction
);
17850 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17851 state_machine
.line
+= line_delta
;
17852 if (line_delta
!= 0)
17853 state_machine
.line_has_non_zero_discriminator
17854 = state_machine
.discriminator
!= 0;
17856 dwarf_record_line (&reader_state
, &state_machine
, 0);
17857 state_machine
.discriminator
= 0;
17859 else switch (op_code
)
17861 case DW_LNS_extended_op
:
17862 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17864 line_ptr
+= bytes_read
;
17865 extended_end
= line_ptr
+ extended_len
;
17866 extended_op
= read_1_byte (abfd
, line_ptr
);
17868 switch (extended_op
)
17870 case DW_LNE_end_sequence
:
17871 state_machine
.record_line
= record_line
;
17874 case DW_LNE_set_address
:
17877 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17879 line_ptr
+= bytes_read
;
17880 check_line_address (cu
, &state_machine
, line_ptr
,
17882 state_machine
.op_index
= 0;
17883 address
+= baseaddr
;
17884 state_machine
.address
17885 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17888 case DW_LNE_define_file
:
17890 const char *cur_file
;
17891 unsigned int dir_index
, mod_time
, length
;
17893 cur_file
= read_direct_string (abfd
, line_ptr
,
17895 line_ptr
+= bytes_read
;
17897 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17898 line_ptr
+= bytes_read
;
17900 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17901 line_ptr
+= bytes_read
;
17903 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17904 line_ptr
+= bytes_read
;
17905 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17908 case DW_LNE_set_discriminator
:
17909 /* The discriminator is not interesting to the debugger;
17910 just ignore it. We still need to check its value though:
17911 if there are consecutive entries for the same
17912 (non-prologue) line we want to coalesce them.
17914 state_machine
.discriminator
17915 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17916 state_machine
.line_has_non_zero_discriminator
17917 |= state_machine
.discriminator
!= 0;
17918 line_ptr
+= bytes_read
;
17921 complaint (&symfile_complaints
,
17922 _("mangled .debug_line section"));
17925 /* Make sure that we parsed the extended op correctly. If e.g.
17926 we expected a different address size than the producer used,
17927 we may have read the wrong number of bytes. */
17928 if (line_ptr
!= extended_end
)
17930 complaint (&symfile_complaints
,
17931 _("mangled .debug_line section"));
17936 dwarf_record_line (&reader_state
, &state_machine
, 0);
17937 state_machine
.discriminator
= 0;
17939 case DW_LNS_advance_pc
:
17942 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17943 CORE_ADDR addr_adj
;
17945 addr_adj
= (((state_machine
.op_index
+ adjust
)
17946 / lh
->maximum_ops_per_instruction
)
17947 * lh
->minimum_instruction_length
);
17948 state_machine
.address
17949 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17950 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17951 % lh
->maximum_ops_per_instruction
);
17952 line_ptr
+= bytes_read
;
17955 case DW_LNS_advance_line
:
17958 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17960 state_machine
.line
+= line_delta
;
17961 if (line_delta
!= 0)
17962 state_machine
.line_has_non_zero_discriminator
17963 = state_machine
.discriminator
!= 0;
17964 line_ptr
+= bytes_read
;
17967 case DW_LNS_set_file
:
17969 /* The arrays lh->include_dirs and lh->file_names are
17970 0-based, but the directory and file name numbers in
17971 the statement program are 1-based. */
17972 struct file_entry
*fe
;
17973 const char *dir
= NULL
;
17975 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
17977 line_ptr
+= bytes_read
;
17978 if (state_machine
.file
== 0
17979 || state_machine
.file
- 1 >= lh
->num_file_names
)
17980 dwarf2_debug_line_missing_file_complaint ();
17983 fe
= &lh
->file_names
[state_machine
.file
- 1];
17984 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17985 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17986 if (record_lines_p
)
17988 state_machine
.last_subfile
= current_subfile
;
17989 state_machine
.line_has_non_zero_discriminator
17990 = state_machine
.discriminator
!= 0;
17991 dwarf2_start_subfile (fe
->name
, dir
);
17996 case DW_LNS_set_column
:
17997 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17998 line_ptr
+= bytes_read
;
18000 case DW_LNS_negate_stmt
:
18001 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18003 case DW_LNS_set_basic_block
:
18005 /* Add to the address register of the state machine the
18006 address increment value corresponding to special opcode
18007 255. I.e., this value is scaled by the minimum
18008 instruction length since special opcode 255 would have
18009 scaled the increment. */
18010 case DW_LNS_const_add_pc
:
18012 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18013 CORE_ADDR addr_adj
;
18015 addr_adj
= (((state_machine
.op_index
+ adjust
)
18016 / lh
->maximum_ops_per_instruction
)
18017 * lh
->minimum_instruction_length
);
18018 state_machine
.address
18019 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18020 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18021 % lh
->maximum_ops_per_instruction
);
18024 case DW_LNS_fixed_advance_pc
:
18026 CORE_ADDR addr_adj
;
18028 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18029 state_machine
.address
18030 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18031 state_machine
.op_index
= 0;
18037 /* Unknown standard opcode, ignore it. */
18040 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18042 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18043 line_ptr
+= bytes_read
;
18050 dwarf2_debug_line_missing_end_sequence_complaint ();
18052 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18053 in which case we still finish recording the last line). */
18054 dwarf_record_line (&reader_state
, &state_machine
, 1);
18058 /* Decode the Line Number Program (LNP) for the given line_header
18059 structure and CU. The actual information extracted and the type
18060 of structures created from the LNP depends on the value of PST.
18062 1. If PST is NULL, then this procedure uses the data from the program
18063 to create all necessary symbol tables, and their linetables.
18065 2. If PST is not NULL, this procedure reads the program to determine
18066 the list of files included by the unit represented by PST, and
18067 builds all the associated partial symbol tables.
18069 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18070 It is used for relative paths in the line table.
18071 NOTE: When processing partial symtabs (pst != NULL),
18072 comp_dir == pst->dirname.
18074 NOTE: It is important that psymtabs have the same file name (via strcmp)
18075 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18076 symtab we don't use it in the name of the psymtabs we create.
18077 E.g. expand_line_sal requires this when finding psymtabs to expand.
18078 A good testcase for this is mb-inline.exp.
18080 LOWPC is the lowest address in CU (or 0 if not known).
18082 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18083 for its PC<->lines mapping information. Otherwise only the filename
18084 table is read in. */
18087 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18088 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18089 CORE_ADDR lowpc
, int decode_mapping
)
18091 struct objfile
*objfile
= cu
->objfile
;
18092 const int decode_for_pst_p
= (pst
!= NULL
);
18094 if (decode_mapping
)
18095 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18097 if (decode_for_pst_p
)
18101 /* Now that we're done scanning the Line Header Program, we can
18102 create the psymtab of each included file. */
18103 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18104 if (lh
->file_names
[file_index
].included_p
== 1)
18106 const char *include_name
=
18107 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18108 if (include_name
!= NULL
)
18109 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18114 /* Make sure a symtab is created for every file, even files
18115 which contain only variables (i.e. no code with associated
18117 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18120 for (i
= 0; i
< lh
->num_file_names
; i
++)
18122 const char *dir
= NULL
;
18123 struct file_entry
*fe
;
18125 fe
= &lh
->file_names
[i
];
18126 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18127 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18128 dwarf2_start_subfile (fe
->name
, dir
);
18130 if (current_subfile
->symtab
== NULL
)
18132 current_subfile
->symtab
18133 = allocate_symtab (cust
, current_subfile
->name
);
18135 fe
->symtab
= current_subfile
->symtab
;
18140 /* Start a subfile for DWARF. FILENAME is the name of the file and
18141 DIRNAME the name of the source directory which contains FILENAME
18142 or NULL if not known.
18143 This routine tries to keep line numbers from identical absolute and
18144 relative file names in a common subfile.
18146 Using the `list' example from the GDB testsuite, which resides in
18147 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18148 of /srcdir/list0.c yields the following debugging information for list0.c:
18150 DW_AT_name: /srcdir/list0.c
18151 DW_AT_comp_dir: /compdir
18152 files.files[0].name: list0.h
18153 files.files[0].dir: /srcdir
18154 files.files[1].name: list0.c
18155 files.files[1].dir: /srcdir
18157 The line number information for list0.c has to end up in a single
18158 subfile, so that `break /srcdir/list0.c:1' works as expected.
18159 start_subfile will ensure that this happens provided that we pass the
18160 concatenation of files.files[1].dir and files.files[1].name as the
18164 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18168 /* In order not to lose the line information directory,
18169 we concatenate it to the filename when it makes sense.
18170 Note that the Dwarf3 standard says (speaking of filenames in line
18171 information): ``The directory index is ignored for file names
18172 that represent full path names''. Thus ignoring dirname in the
18173 `else' branch below isn't an issue. */
18175 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18177 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18181 start_subfile (filename
);
18187 /* Start a symtab for DWARF.
18188 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18190 static struct compunit_symtab
*
18191 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18192 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18194 struct compunit_symtab
*cust
18195 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18197 record_debugformat ("DWARF 2");
18198 record_producer (cu
->producer
);
18200 /* We assume that we're processing GCC output. */
18201 processing_gcc_compilation
= 2;
18203 cu
->processing_has_namespace_info
= 0;
18209 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18210 struct dwarf2_cu
*cu
)
18212 struct objfile
*objfile
= cu
->objfile
;
18213 struct comp_unit_head
*cu_header
= &cu
->header
;
18215 /* NOTE drow/2003-01-30: There used to be a comment and some special
18216 code here to turn a symbol with DW_AT_external and a
18217 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18218 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18219 with some versions of binutils) where shared libraries could have
18220 relocations against symbols in their debug information - the
18221 minimal symbol would have the right address, but the debug info
18222 would not. It's no longer necessary, because we will explicitly
18223 apply relocations when we read in the debug information now. */
18225 /* A DW_AT_location attribute with no contents indicates that a
18226 variable has been optimized away. */
18227 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18229 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18233 /* Handle one degenerate form of location expression specially, to
18234 preserve GDB's previous behavior when section offsets are
18235 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18236 then mark this symbol as LOC_STATIC. */
18238 if (attr_form_is_block (attr
)
18239 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18240 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18241 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18242 && (DW_BLOCK (attr
)->size
18243 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18245 unsigned int dummy
;
18247 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18248 SYMBOL_VALUE_ADDRESS (sym
) =
18249 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18251 SYMBOL_VALUE_ADDRESS (sym
) =
18252 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18253 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18254 fixup_symbol_section (sym
, objfile
);
18255 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18256 SYMBOL_SECTION (sym
));
18260 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18261 expression evaluator, and use LOC_COMPUTED only when necessary
18262 (i.e. when the value of a register or memory location is
18263 referenced, or a thread-local block, etc.). Then again, it might
18264 not be worthwhile. I'm assuming that it isn't unless performance
18265 or memory numbers show me otherwise. */
18267 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18269 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18270 cu
->has_loclist
= 1;
18273 /* Given a pointer to a DWARF information entry, figure out if we need
18274 to make a symbol table entry for it, and if so, create a new entry
18275 and return a pointer to it.
18276 If TYPE is NULL, determine symbol type from the die, otherwise
18277 used the passed type.
18278 If SPACE is not NULL, use it to hold the new symbol. If it is
18279 NULL, allocate a new symbol on the objfile's obstack. */
18281 static struct symbol
*
18282 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18283 struct symbol
*space
)
18285 struct objfile
*objfile
= cu
->objfile
;
18286 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18287 struct symbol
*sym
= NULL
;
18289 struct attribute
*attr
= NULL
;
18290 struct attribute
*attr2
= NULL
;
18291 CORE_ADDR baseaddr
;
18292 struct pending
**list_to_add
= NULL
;
18294 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18296 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18298 name
= dwarf2_name (die
, cu
);
18301 const char *linkagename
;
18302 int suppress_add
= 0;
18307 sym
= allocate_symbol (objfile
);
18308 OBJSTAT (objfile
, n_syms
++);
18310 /* Cache this symbol's name and the name's demangled form (if any). */
18311 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18312 linkagename
= dwarf2_physname (name
, die
, cu
);
18313 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18315 /* Fortran does not have mangling standard and the mangling does differ
18316 between gfortran, iFort etc. */
18317 if (cu
->language
== language_fortran
18318 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18319 symbol_set_demangled_name (&(sym
->ginfo
),
18320 dwarf2_full_name (name
, die
, cu
),
18323 /* Default assumptions.
18324 Use the passed type or decode it from the die. */
18325 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18326 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18328 SYMBOL_TYPE (sym
) = type
;
18330 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18331 attr
= dwarf2_attr (die
,
18332 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18336 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18339 attr
= dwarf2_attr (die
,
18340 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18344 int file_index
= DW_UNSND (attr
);
18346 if (cu
->line_header
== NULL
18347 || file_index
> cu
->line_header
->num_file_names
)
18348 complaint (&symfile_complaints
,
18349 _("file index out of range"));
18350 else if (file_index
> 0)
18352 struct file_entry
*fe
;
18354 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18355 symbol_set_symtab (sym
, fe
->symtab
);
18362 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18367 addr
= attr_value_as_address (attr
);
18368 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18369 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18371 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18372 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18373 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18374 add_symbol_to_list (sym
, cu
->list_in_scope
);
18376 case DW_TAG_subprogram
:
18377 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18379 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18380 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18381 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18382 || cu
->language
== language_ada
)
18384 /* Subprograms marked external are stored as a global symbol.
18385 Ada subprograms, whether marked external or not, are always
18386 stored as a global symbol, because we want to be able to
18387 access them globally. For instance, we want to be able
18388 to break on a nested subprogram without having to
18389 specify the context. */
18390 list_to_add
= &global_symbols
;
18394 list_to_add
= cu
->list_in_scope
;
18397 case DW_TAG_inlined_subroutine
:
18398 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18400 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18401 SYMBOL_INLINED (sym
) = 1;
18402 list_to_add
= cu
->list_in_scope
;
18404 case DW_TAG_template_value_param
:
18406 /* Fall through. */
18407 case DW_TAG_constant
:
18408 case DW_TAG_variable
:
18409 case DW_TAG_member
:
18410 /* Compilation with minimal debug info may result in
18411 variables with missing type entries. Change the
18412 misleading `void' type to something sensible. */
18413 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18415 = objfile_type (objfile
)->nodebug_data_symbol
;
18417 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18418 /* In the case of DW_TAG_member, we should only be called for
18419 static const members. */
18420 if (die
->tag
== DW_TAG_member
)
18422 /* dwarf2_add_field uses die_is_declaration,
18423 so we do the same. */
18424 gdb_assert (die_is_declaration (die
, cu
));
18429 dwarf2_const_value (attr
, sym
, cu
);
18430 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18433 if (attr2
&& (DW_UNSND (attr2
) != 0))
18434 list_to_add
= &global_symbols
;
18436 list_to_add
= cu
->list_in_scope
;
18440 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18443 var_decode_location (attr
, sym
, cu
);
18444 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18446 /* Fortran explicitly imports any global symbols to the local
18447 scope by DW_TAG_common_block. */
18448 if (cu
->language
== language_fortran
&& die
->parent
18449 && die
->parent
->tag
== DW_TAG_common_block
)
18452 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18453 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18454 && !dwarf2_per_objfile
->has_section_at_zero
)
18456 /* When a static variable is eliminated by the linker,
18457 the corresponding debug information is not stripped
18458 out, but the variable address is set to null;
18459 do not add such variables into symbol table. */
18461 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18463 /* Workaround gfortran PR debug/40040 - it uses
18464 DW_AT_location for variables in -fPIC libraries which may
18465 get overriden by other libraries/executable and get
18466 a different address. Resolve it by the minimal symbol
18467 which may come from inferior's executable using copy
18468 relocation. Make this workaround only for gfortran as for
18469 other compilers GDB cannot guess the minimal symbol
18470 Fortran mangling kind. */
18471 if (cu
->language
== language_fortran
&& die
->parent
18472 && die
->parent
->tag
== DW_TAG_module
18474 && startswith (cu
->producer
, "GNU Fortran "))
18475 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18477 /* A variable with DW_AT_external is never static,
18478 but it may be block-scoped. */
18479 list_to_add
= (cu
->list_in_scope
== &file_symbols
18480 ? &global_symbols
: cu
->list_in_scope
);
18483 list_to_add
= cu
->list_in_scope
;
18487 /* We do not know the address of this symbol.
18488 If it is an external symbol and we have type information
18489 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18490 The address of the variable will then be determined from
18491 the minimal symbol table whenever the variable is
18493 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18495 /* Fortran explicitly imports any global symbols to the local
18496 scope by DW_TAG_common_block. */
18497 if (cu
->language
== language_fortran
&& die
->parent
18498 && die
->parent
->tag
== DW_TAG_common_block
)
18500 /* SYMBOL_CLASS doesn't matter here because
18501 read_common_block is going to reset it. */
18503 list_to_add
= cu
->list_in_scope
;
18505 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18506 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18508 /* A variable with DW_AT_external is never static, but it
18509 may be block-scoped. */
18510 list_to_add
= (cu
->list_in_scope
== &file_symbols
18511 ? &global_symbols
: cu
->list_in_scope
);
18513 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18515 else if (!die_is_declaration (die
, cu
))
18517 /* Use the default LOC_OPTIMIZED_OUT class. */
18518 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18520 list_to_add
= cu
->list_in_scope
;
18524 case DW_TAG_formal_parameter
:
18525 /* If we are inside a function, mark this as an argument. If
18526 not, we might be looking at an argument to an inlined function
18527 when we do not have enough information to show inlined frames;
18528 pretend it's a local variable in that case so that the user can
18530 if (context_stack_depth
> 0
18531 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18532 SYMBOL_IS_ARGUMENT (sym
) = 1;
18533 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18536 var_decode_location (attr
, sym
, cu
);
18538 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18541 dwarf2_const_value (attr
, sym
, cu
);
18544 list_to_add
= cu
->list_in_scope
;
18546 case DW_TAG_unspecified_parameters
:
18547 /* From varargs functions; gdb doesn't seem to have any
18548 interest in this information, so just ignore it for now.
18551 case DW_TAG_template_type_param
:
18553 /* Fall through. */
18554 case DW_TAG_class_type
:
18555 case DW_TAG_interface_type
:
18556 case DW_TAG_structure_type
:
18557 case DW_TAG_union_type
:
18558 case DW_TAG_set_type
:
18559 case DW_TAG_enumeration_type
:
18560 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18561 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18564 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18565 really ever be static objects: otherwise, if you try
18566 to, say, break of a class's method and you're in a file
18567 which doesn't mention that class, it won't work unless
18568 the check for all static symbols in lookup_symbol_aux
18569 saves you. See the OtherFileClass tests in
18570 gdb.c++/namespace.exp. */
18574 list_to_add
= (cu
->list_in_scope
== &file_symbols
18575 && (cu
->language
== language_cplus
18576 || cu
->language
== language_java
)
18577 ? &global_symbols
: cu
->list_in_scope
);
18579 /* The semantics of C++ state that "struct foo {
18580 ... }" also defines a typedef for "foo". A Java
18581 class declaration also defines a typedef for the
18583 if (cu
->language
== language_cplus
18584 || cu
->language
== language_java
18585 || cu
->language
== language_ada
18586 || cu
->language
== language_d
)
18588 /* The symbol's name is already allocated along
18589 with this objfile, so we don't need to
18590 duplicate it for the type. */
18591 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18592 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18597 case DW_TAG_typedef
:
18598 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18599 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18600 list_to_add
= cu
->list_in_scope
;
18602 case DW_TAG_base_type
:
18603 case DW_TAG_subrange_type
:
18604 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18605 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18606 list_to_add
= cu
->list_in_scope
;
18608 case DW_TAG_enumerator
:
18609 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18612 dwarf2_const_value (attr
, sym
, cu
);
18615 /* NOTE: carlton/2003-11-10: See comment above in the
18616 DW_TAG_class_type, etc. block. */
18618 list_to_add
= (cu
->list_in_scope
== &file_symbols
18619 && (cu
->language
== language_cplus
18620 || cu
->language
== language_java
)
18621 ? &global_symbols
: cu
->list_in_scope
);
18624 case DW_TAG_imported_declaration
:
18625 case DW_TAG_namespace
:
18626 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18627 list_to_add
= &global_symbols
;
18629 case DW_TAG_module
:
18630 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18631 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18632 list_to_add
= &global_symbols
;
18634 case DW_TAG_common_block
:
18635 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18636 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18637 add_symbol_to_list (sym
, cu
->list_in_scope
);
18640 /* Not a tag we recognize. Hopefully we aren't processing
18641 trash data, but since we must specifically ignore things
18642 we don't recognize, there is nothing else we should do at
18644 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18645 dwarf_tag_name (die
->tag
));
18651 sym
->hash_next
= objfile
->template_symbols
;
18652 objfile
->template_symbols
= sym
;
18653 list_to_add
= NULL
;
18656 if (list_to_add
!= NULL
)
18657 add_symbol_to_list (sym
, list_to_add
);
18659 /* For the benefit of old versions of GCC, check for anonymous
18660 namespaces based on the demangled name. */
18661 if (!cu
->processing_has_namespace_info
18662 && cu
->language
== language_cplus
)
18663 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18668 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18670 static struct symbol
*
18671 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18673 return new_symbol_full (die
, type
, cu
, NULL
);
18676 /* Given an attr with a DW_FORM_dataN value in host byte order,
18677 zero-extend it as appropriate for the symbol's type. The DWARF
18678 standard (v4) is not entirely clear about the meaning of using
18679 DW_FORM_dataN for a constant with a signed type, where the type is
18680 wider than the data. The conclusion of a discussion on the DWARF
18681 list was that this is unspecified. We choose to always zero-extend
18682 because that is the interpretation long in use by GCC. */
18685 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18686 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18688 struct objfile
*objfile
= cu
->objfile
;
18689 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18690 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18691 LONGEST l
= DW_UNSND (attr
);
18693 if (bits
< sizeof (*value
) * 8)
18695 l
&= ((LONGEST
) 1 << bits
) - 1;
18698 else if (bits
== sizeof (*value
) * 8)
18702 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18703 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18710 /* Read a constant value from an attribute. Either set *VALUE, or if
18711 the value does not fit in *VALUE, set *BYTES - either already
18712 allocated on the objfile obstack, or newly allocated on OBSTACK,
18713 or, set *BATON, if we translated the constant to a location
18717 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18718 const char *name
, struct obstack
*obstack
,
18719 struct dwarf2_cu
*cu
,
18720 LONGEST
*value
, const gdb_byte
**bytes
,
18721 struct dwarf2_locexpr_baton
**baton
)
18723 struct objfile
*objfile
= cu
->objfile
;
18724 struct comp_unit_head
*cu_header
= &cu
->header
;
18725 struct dwarf_block
*blk
;
18726 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18727 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18733 switch (attr
->form
)
18736 case DW_FORM_GNU_addr_index
:
18740 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18741 dwarf2_const_value_length_mismatch_complaint (name
,
18742 cu_header
->addr_size
,
18743 TYPE_LENGTH (type
));
18744 /* Symbols of this form are reasonably rare, so we just
18745 piggyback on the existing location code rather than writing
18746 a new implementation of symbol_computed_ops. */
18747 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18748 (*baton
)->per_cu
= cu
->per_cu
;
18749 gdb_assert ((*baton
)->per_cu
);
18751 (*baton
)->size
= 2 + cu_header
->addr_size
;
18752 data
= obstack_alloc (obstack
, (*baton
)->size
);
18753 (*baton
)->data
= data
;
18755 data
[0] = DW_OP_addr
;
18756 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18757 byte_order
, DW_ADDR (attr
));
18758 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18761 case DW_FORM_string
:
18763 case DW_FORM_GNU_str_index
:
18764 case DW_FORM_GNU_strp_alt
:
18765 /* DW_STRING is already allocated on the objfile obstack, point
18767 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18769 case DW_FORM_block1
:
18770 case DW_FORM_block2
:
18771 case DW_FORM_block4
:
18772 case DW_FORM_block
:
18773 case DW_FORM_exprloc
:
18774 blk
= DW_BLOCK (attr
);
18775 if (TYPE_LENGTH (type
) != blk
->size
)
18776 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18777 TYPE_LENGTH (type
));
18778 *bytes
= blk
->data
;
18781 /* The DW_AT_const_value attributes are supposed to carry the
18782 symbol's value "represented as it would be on the target
18783 architecture." By the time we get here, it's already been
18784 converted to host endianness, so we just need to sign- or
18785 zero-extend it as appropriate. */
18786 case DW_FORM_data1
:
18787 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18789 case DW_FORM_data2
:
18790 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18792 case DW_FORM_data4
:
18793 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18795 case DW_FORM_data8
:
18796 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18799 case DW_FORM_sdata
:
18800 *value
= DW_SND (attr
);
18803 case DW_FORM_udata
:
18804 *value
= DW_UNSND (attr
);
18808 complaint (&symfile_complaints
,
18809 _("unsupported const value attribute form: '%s'"),
18810 dwarf_form_name (attr
->form
));
18817 /* Copy constant value from an attribute to a symbol. */
18820 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18821 struct dwarf2_cu
*cu
)
18823 struct objfile
*objfile
= cu
->objfile
;
18824 struct comp_unit_head
*cu_header
= &cu
->header
;
18826 const gdb_byte
*bytes
;
18827 struct dwarf2_locexpr_baton
*baton
;
18829 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18830 SYMBOL_PRINT_NAME (sym
),
18831 &objfile
->objfile_obstack
, cu
,
18832 &value
, &bytes
, &baton
);
18836 SYMBOL_LOCATION_BATON (sym
) = baton
;
18837 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18839 else if (bytes
!= NULL
)
18841 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18842 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18846 SYMBOL_VALUE (sym
) = value
;
18847 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18851 /* Return the type of the die in question using its DW_AT_type attribute. */
18853 static struct type
*
18854 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18856 struct attribute
*type_attr
;
18858 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18861 /* A missing DW_AT_type represents a void type. */
18862 return objfile_type (cu
->objfile
)->builtin_void
;
18865 return lookup_die_type (die
, type_attr
, cu
);
18868 /* True iff CU's producer generates GNAT Ada auxiliary information
18869 that allows to find parallel types through that information instead
18870 of having to do expensive parallel lookups by type name. */
18873 need_gnat_info (struct dwarf2_cu
*cu
)
18875 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18876 of GNAT produces this auxiliary information, without any indication
18877 that it is produced. Part of enhancing the FSF version of GNAT
18878 to produce that information will be to put in place an indicator
18879 that we can use in order to determine whether the descriptive type
18880 info is available or not. One suggestion that has been made is
18881 to use a new attribute, attached to the CU die. For now, assume
18882 that the descriptive type info is not available. */
18886 /* Return the auxiliary type of the die in question using its
18887 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18888 attribute is not present. */
18890 static struct type
*
18891 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18893 struct attribute
*type_attr
;
18895 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18899 return lookup_die_type (die
, type_attr
, cu
);
18902 /* If DIE has a descriptive_type attribute, then set the TYPE's
18903 descriptive type accordingly. */
18906 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18907 struct dwarf2_cu
*cu
)
18909 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18911 if (descriptive_type
)
18913 ALLOCATE_GNAT_AUX_TYPE (type
);
18914 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18918 /* Return the containing type of the die in question using its
18919 DW_AT_containing_type attribute. */
18921 static struct type
*
18922 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18924 struct attribute
*type_attr
;
18926 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18928 error (_("Dwarf Error: Problem turning containing type into gdb type "
18929 "[in module %s]"), objfile_name (cu
->objfile
));
18931 return lookup_die_type (die
, type_attr
, cu
);
18934 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18936 static struct type
*
18937 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18939 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18940 char *message
, *saved
;
18942 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18943 objfile_name (objfile
),
18944 cu
->header
.offset
.sect_off
,
18945 die
->offset
.sect_off
);
18946 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18947 message
, strlen (message
));
18950 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18953 /* Look up the type of DIE in CU using its type attribute ATTR.
18954 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18955 DW_AT_containing_type.
18956 If there is no type substitute an error marker. */
18958 static struct type
*
18959 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18960 struct dwarf2_cu
*cu
)
18962 struct objfile
*objfile
= cu
->objfile
;
18963 struct type
*this_type
;
18965 gdb_assert (attr
->name
== DW_AT_type
18966 || attr
->name
== DW_AT_GNAT_descriptive_type
18967 || attr
->name
== DW_AT_containing_type
);
18969 /* First see if we have it cached. */
18971 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18973 struct dwarf2_per_cu_data
*per_cu
;
18974 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18976 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18977 this_type
= get_die_type_at_offset (offset
, per_cu
);
18979 else if (attr_form_is_ref (attr
))
18981 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18983 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18985 else if (attr
->form
== DW_FORM_ref_sig8
)
18987 ULONGEST signature
= DW_SIGNATURE (attr
);
18989 return get_signatured_type (die
, signature
, cu
);
18993 complaint (&symfile_complaints
,
18994 _("Dwarf Error: Bad type attribute %s in DIE"
18995 " at 0x%x [in module %s]"),
18996 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18997 objfile_name (objfile
));
18998 return build_error_marker_type (cu
, die
);
19001 /* If not cached we need to read it in. */
19003 if (this_type
== NULL
)
19005 struct die_info
*type_die
= NULL
;
19006 struct dwarf2_cu
*type_cu
= cu
;
19008 if (attr_form_is_ref (attr
))
19009 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19010 if (type_die
== NULL
)
19011 return build_error_marker_type (cu
, die
);
19012 /* If we find the type now, it's probably because the type came
19013 from an inter-CU reference and the type's CU got expanded before
19015 this_type
= read_type_die (type_die
, type_cu
);
19018 /* If we still don't have a type use an error marker. */
19020 if (this_type
== NULL
)
19021 return build_error_marker_type (cu
, die
);
19026 /* Return the type in DIE, CU.
19027 Returns NULL for invalid types.
19029 This first does a lookup in die_type_hash,
19030 and only reads the die in if necessary.
19032 NOTE: This can be called when reading in partial or full symbols. */
19034 static struct type
*
19035 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19037 struct type
*this_type
;
19039 this_type
= get_die_type (die
, cu
);
19043 return read_type_die_1 (die
, cu
);
19046 /* Read the type in DIE, CU.
19047 Returns NULL for invalid types. */
19049 static struct type
*
19050 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19052 struct type
*this_type
= NULL
;
19056 case DW_TAG_class_type
:
19057 case DW_TAG_interface_type
:
19058 case DW_TAG_structure_type
:
19059 case DW_TAG_union_type
:
19060 this_type
= read_structure_type (die
, cu
);
19062 case DW_TAG_enumeration_type
:
19063 this_type
= read_enumeration_type (die
, cu
);
19065 case DW_TAG_subprogram
:
19066 case DW_TAG_subroutine_type
:
19067 case DW_TAG_inlined_subroutine
:
19068 this_type
= read_subroutine_type (die
, cu
);
19070 case DW_TAG_array_type
:
19071 this_type
= read_array_type (die
, cu
);
19073 case DW_TAG_set_type
:
19074 this_type
= read_set_type (die
, cu
);
19076 case DW_TAG_pointer_type
:
19077 this_type
= read_tag_pointer_type (die
, cu
);
19079 case DW_TAG_ptr_to_member_type
:
19080 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19082 case DW_TAG_reference_type
:
19083 this_type
= read_tag_reference_type (die
, cu
);
19085 case DW_TAG_const_type
:
19086 this_type
= read_tag_const_type (die
, cu
);
19088 case DW_TAG_volatile_type
:
19089 this_type
= read_tag_volatile_type (die
, cu
);
19091 case DW_TAG_restrict_type
:
19092 this_type
= read_tag_restrict_type (die
, cu
);
19094 case DW_TAG_string_type
:
19095 this_type
= read_tag_string_type (die
, cu
);
19097 case DW_TAG_typedef
:
19098 this_type
= read_typedef (die
, cu
);
19100 case DW_TAG_subrange_type
:
19101 this_type
= read_subrange_type (die
, cu
);
19103 case DW_TAG_base_type
:
19104 this_type
= read_base_type (die
, cu
);
19106 case DW_TAG_unspecified_type
:
19107 this_type
= read_unspecified_type (die
, cu
);
19109 case DW_TAG_namespace
:
19110 this_type
= read_namespace_type (die
, cu
);
19112 case DW_TAG_module
:
19113 this_type
= read_module_type (die
, cu
);
19115 case DW_TAG_atomic_type
:
19116 this_type
= read_tag_atomic_type (die
, cu
);
19119 complaint (&symfile_complaints
,
19120 _("unexpected tag in read_type_die: '%s'"),
19121 dwarf_tag_name (die
->tag
));
19128 /* See if we can figure out if the class lives in a namespace. We do
19129 this by looking for a member function; its demangled name will
19130 contain namespace info, if there is any.
19131 Return the computed name or NULL.
19132 Space for the result is allocated on the objfile's obstack.
19133 This is the full-die version of guess_partial_die_structure_name.
19134 In this case we know DIE has no useful parent. */
19137 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19139 struct die_info
*spec_die
;
19140 struct dwarf2_cu
*spec_cu
;
19141 struct die_info
*child
;
19144 spec_die
= die_specification (die
, &spec_cu
);
19145 if (spec_die
!= NULL
)
19151 for (child
= die
->child
;
19153 child
= child
->sibling
)
19155 if (child
->tag
== DW_TAG_subprogram
)
19157 struct attribute
*attr
;
19159 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
19161 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
19165 = language_class_name_from_physname (cu
->language_defn
,
19169 if (actual_name
!= NULL
)
19171 const char *die_name
= dwarf2_name (die
, cu
);
19173 if (die_name
!= NULL
19174 && strcmp (die_name
, actual_name
) != 0)
19176 /* Strip off the class name from the full name.
19177 We want the prefix. */
19178 int die_name_len
= strlen (die_name
);
19179 int actual_name_len
= strlen (actual_name
);
19181 /* Test for '::' as a sanity check. */
19182 if (actual_name_len
> die_name_len
+ 2
19183 && actual_name
[actual_name_len
19184 - die_name_len
- 1] == ':')
19186 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19188 actual_name_len
- die_name_len
- 2);
19191 xfree (actual_name
);
19200 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19201 prefix part in such case. See
19202 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19205 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19207 struct attribute
*attr
;
19210 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19211 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19214 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19215 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19218 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19220 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19221 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19224 /* dwarf2_name had to be already called. */
19225 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19227 /* Strip the base name, keep any leading namespaces/classes. */
19228 base
= strrchr (DW_STRING (attr
), ':');
19229 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19232 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19233 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
19236 /* Return the name of the namespace/class that DIE is defined within,
19237 or "" if we can't tell. The caller should not xfree the result.
19239 For example, if we're within the method foo() in the following
19249 then determine_prefix on foo's die will return "N::C". */
19251 static const char *
19252 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19254 struct die_info
*parent
, *spec_die
;
19255 struct dwarf2_cu
*spec_cu
;
19256 struct type
*parent_type
;
19259 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19260 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
)
19263 retval
= anonymous_struct_prefix (die
, cu
);
19267 /* We have to be careful in the presence of DW_AT_specification.
19268 For example, with GCC 3.4, given the code
19272 // Definition of N::foo.
19276 then we'll have a tree of DIEs like this:
19278 1: DW_TAG_compile_unit
19279 2: DW_TAG_namespace // N
19280 3: DW_TAG_subprogram // declaration of N::foo
19281 4: DW_TAG_subprogram // definition of N::foo
19282 DW_AT_specification // refers to die #3
19284 Thus, when processing die #4, we have to pretend that we're in
19285 the context of its DW_AT_specification, namely the contex of die
19288 spec_die
= die_specification (die
, &spec_cu
);
19289 if (spec_die
== NULL
)
19290 parent
= die
->parent
;
19293 parent
= spec_die
->parent
;
19297 if (parent
== NULL
)
19299 else if (parent
->building_fullname
)
19302 const char *parent_name
;
19304 /* It has been seen on RealView 2.2 built binaries,
19305 DW_TAG_template_type_param types actually _defined_ as
19306 children of the parent class:
19309 template class <class Enum> Class{};
19310 Class<enum E> class_e;
19312 1: DW_TAG_class_type (Class)
19313 2: DW_TAG_enumeration_type (E)
19314 3: DW_TAG_enumerator (enum1:0)
19315 3: DW_TAG_enumerator (enum2:1)
19317 2: DW_TAG_template_type_param
19318 DW_AT_type DW_FORM_ref_udata (E)
19320 Besides being broken debug info, it can put GDB into an
19321 infinite loop. Consider:
19323 When we're building the full name for Class<E>, we'll start
19324 at Class, and go look over its template type parameters,
19325 finding E. We'll then try to build the full name of E, and
19326 reach here. We're now trying to build the full name of E,
19327 and look over the parent DIE for containing scope. In the
19328 broken case, if we followed the parent DIE of E, we'd again
19329 find Class, and once again go look at its template type
19330 arguments, etc., etc. Simply don't consider such parent die
19331 as source-level parent of this die (it can't be, the language
19332 doesn't allow it), and break the loop here. */
19333 name
= dwarf2_name (die
, cu
);
19334 parent_name
= dwarf2_name (parent
, cu
);
19335 complaint (&symfile_complaints
,
19336 _("template param type '%s' defined within parent '%s'"),
19337 name
? name
: "<unknown>",
19338 parent_name
? parent_name
: "<unknown>");
19342 switch (parent
->tag
)
19344 case DW_TAG_namespace
:
19345 parent_type
= read_type_die (parent
, cu
);
19346 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19347 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19348 Work around this problem here. */
19349 if (cu
->language
== language_cplus
19350 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19352 /* We give a name to even anonymous namespaces. */
19353 return TYPE_TAG_NAME (parent_type
);
19354 case DW_TAG_class_type
:
19355 case DW_TAG_interface_type
:
19356 case DW_TAG_structure_type
:
19357 case DW_TAG_union_type
:
19358 case DW_TAG_module
:
19359 parent_type
= read_type_die (parent
, cu
);
19360 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19361 return TYPE_TAG_NAME (parent_type
);
19363 /* An anonymous structure is only allowed non-static data
19364 members; no typedefs, no member functions, et cetera.
19365 So it does not need a prefix. */
19367 case DW_TAG_compile_unit
:
19368 case DW_TAG_partial_unit
:
19369 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19370 if (cu
->language
== language_cplus
19371 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19372 && die
->child
!= NULL
19373 && (die
->tag
== DW_TAG_class_type
19374 || die
->tag
== DW_TAG_structure_type
19375 || die
->tag
== DW_TAG_union_type
))
19377 char *name
= guess_full_die_structure_name (die
, cu
);
19382 case DW_TAG_enumeration_type
:
19383 parent_type
= read_type_die (parent
, cu
);
19384 if (TYPE_DECLARED_CLASS (parent_type
))
19386 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19387 return TYPE_TAG_NAME (parent_type
);
19390 /* Fall through. */
19392 return determine_prefix (parent
, cu
);
19396 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19397 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19398 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19399 an obconcat, otherwise allocate storage for the result. The CU argument is
19400 used to determine the language and hence, the appropriate separator. */
19402 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19405 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19406 int physname
, struct dwarf2_cu
*cu
)
19408 const char *lead
= "";
19411 if (suffix
== NULL
|| suffix
[0] == '\0'
19412 || prefix
== NULL
|| prefix
[0] == '\0')
19414 else if (cu
->language
== language_java
)
19416 else if (cu
->language
== language_d
)
19418 /* For D, the 'main' function could be defined in any module, but it
19419 should never be prefixed. */
19420 if (strcmp (suffix
, "D main") == 0)
19428 else if (cu
->language
== language_fortran
&& physname
)
19430 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19431 DW_AT_MIPS_linkage_name is preferred and used instead. */
19439 if (prefix
== NULL
)
19441 if (suffix
== NULL
)
19447 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19449 strcpy (retval
, lead
);
19450 strcat (retval
, prefix
);
19451 strcat (retval
, sep
);
19452 strcat (retval
, suffix
);
19457 /* We have an obstack. */
19458 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19462 /* Return sibling of die, NULL if no sibling. */
19464 static struct die_info
*
19465 sibling_die (struct die_info
*die
)
19467 return die
->sibling
;
19470 /* Get name of a die, return NULL if not found. */
19472 static const char *
19473 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19474 struct obstack
*obstack
)
19476 if (name
&& cu
->language
== language_cplus
)
19478 char *canon_name
= cp_canonicalize_string (name
);
19480 if (canon_name
!= NULL
)
19482 if (strcmp (canon_name
, name
) != 0)
19483 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19484 xfree (canon_name
);
19491 /* Get name of a die, return NULL if not found.
19492 Anonymous namespaces are converted to their magic string. */
19494 static const char *
19495 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19497 struct attribute
*attr
;
19499 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19500 if ((!attr
|| !DW_STRING (attr
))
19501 && die
->tag
!= DW_TAG_namespace
19502 && die
->tag
!= DW_TAG_class_type
19503 && die
->tag
!= DW_TAG_interface_type
19504 && die
->tag
!= DW_TAG_structure_type
19505 && die
->tag
!= DW_TAG_union_type
)
19510 case DW_TAG_compile_unit
:
19511 case DW_TAG_partial_unit
:
19512 /* Compilation units have a DW_AT_name that is a filename, not
19513 a source language identifier. */
19514 case DW_TAG_enumeration_type
:
19515 case DW_TAG_enumerator
:
19516 /* These tags always have simple identifiers already; no need
19517 to canonicalize them. */
19518 return DW_STRING (attr
);
19520 case DW_TAG_namespace
:
19521 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19522 return DW_STRING (attr
);
19523 return CP_ANONYMOUS_NAMESPACE_STR
;
19525 case DW_TAG_subprogram
:
19526 /* Java constructors will all be named "<init>", so return
19527 the class name when we see this special case. */
19528 if (cu
->language
== language_java
19529 && DW_STRING (attr
) != NULL
19530 && strcmp (DW_STRING (attr
), "<init>") == 0)
19532 struct dwarf2_cu
*spec_cu
= cu
;
19533 struct die_info
*spec_die
;
19535 /* GCJ will output '<init>' for Java constructor names.
19536 For this special case, return the name of the parent class. */
19538 /* GCJ may output subprogram DIEs with AT_specification set.
19539 If so, use the name of the specified DIE. */
19540 spec_die
= die_specification (die
, &spec_cu
);
19541 if (spec_die
!= NULL
)
19542 return dwarf2_name (spec_die
, spec_cu
);
19547 if (die
->tag
== DW_TAG_class_type
)
19548 return dwarf2_name (die
, cu
);
19550 while (die
->tag
!= DW_TAG_compile_unit
19551 && die
->tag
!= DW_TAG_partial_unit
);
19555 case DW_TAG_class_type
:
19556 case DW_TAG_interface_type
:
19557 case DW_TAG_structure_type
:
19558 case DW_TAG_union_type
:
19559 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19560 structures or unions. These were of the form "._%d" in GCC 4.1,
19561 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19562 and GCC 4.4. We work around this problem by ignoring these. */
19563 if (attr
&& DW_STRING (attr
)
19564 && (startswith (DW_STRING (attr
), "._")
19565 || startswith (DW_STRING (attr
), "<anonymous")))
19568 /* GCC might emit a nameless typedef that has a linkage name. See
19569 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19570 if (!attr
|| DW_STRING (attr
) == NULL
)
19572 char *demangled
= NULL
;
19574 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19576 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19578 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19581 /* Avoid demangling DW_STRING (attr) the second time on a second
19582 call for the same DIE. */
19583 if (!DW_STRING_IS_CANONICAL (attr
))
19584 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19590 /* FIXME: we already did this for the partial symbol... */
19592 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19593 demangled
, strlen (demangled
));
19594 DW_STRING_IS_CANONICAL (attr
) = 1;
19597 /* Strip any leading namespaces/classes, keep only the base name.
19598 DW_AT_name for named DIEs does not contain the prefixes. */
19599 base
= strrchr (DW_STRING (attr
), ':');
19600 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19603 return DW_STRING (attr
);
19612 if (!DW_STRING_IS_CANONICAL (attr
))
19615 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19616 &cu
->objfile
->per_bfd
->storage_obstack
);
19617 DW_STRING_IS_CANONICAL (attr
) = 1;
19619 return DW_STRING (attr
);
19622 /* Return the die that this die in an extension of, or NULL if there
19623 is none. *EXT_CU is the CU containing DIE on input, and the CU
19624 containing the return value on output. */
19626 static struct die_info
*
19627 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19629 struct attribute
*attr
;
19631 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19635 return follow_die_ref (die
, attr
, ext_cu
);
19638 /* Convert a DIE tag into its string name. */
19640 static const char *
19641 dwarf_tag_name (unsigned tag
)
19643 const char *name
= get_DW_TAG_name (tag
);
19646 return "DW_TAG_<unknown>";
19651 /* Convert a DWARF attribute code into its string name. */
19653 static const char *
19654 dwarf_attr_name (unsigned attr
)
19658 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19659 if (attr
== DW_AT_MIPS_fde
)
19660 return "DW_AT_MIPS_fde";
19662 if (attr
== DW_AT_HP_block_index
)
19663 return "DW_AT_HP_block_index";
19666 name
= get_DW_AT_name (attr
);
19669 return "DW_AT_<unknown>";
19674 /* Convert a DWARF value form code into its string name. */
19676 static const char *
19677 dwarf_form_name (unsigned form
)
19679 const char *name
= get_DW_FORM_name (form
);
19682 return "DW_FORM_<unknown>";
19688 dwarf_bool_name (unsigned mybool
)
19696 /* Convert a DWARF type code into its string name. */
19698 static const char *
19699 dwarf_type_encoding_name (unsigned enc
)
19701 const char *name
= get_DW_ATE_name (enc
);
19704 return "DW_ATE_<unknown>";
19710 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19714 print_spaces (indent
, f
);
19715 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19716 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19718 if (die
->parent
!= NULL
)
19720 print_spaces (indent
, f
);
19721 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19722 die
->parent
->offset
.sect_off
);
19725 print_spaces (indent
, f
);
19726 fprintf_unfiltered (f
, " has children: %s\n",
19727 dwarf_bool_name (die
->child
!= NULL
));
19729 print_spaces (indent
, f
);
19730 fprintf_unfiltered (f
, " attributes:\n");
19732 for (i
= 0; i
< die
->num_attrs
; ++i
)
19734 print_spaces (indent
, f
);
19735 fprintf_unfiltered (f
, " %s (%s) ",
19736 dwarf_attr_name (die
->attrs
[i
].name
),
19737 dwarf_form_name (die
->attrs
[i
].form
));
19739 switch (die
->attrs
[i
].form
)
19742 case DW_FORM_GNU_addr_index
:
19743 fprintf_unfiltered (f
, "address: ");
19744 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19746 case DW_FORM_block2
:
19747 case DW_FORM_block4
:
19748 case DW_FORM_block
:
19749 case DW_FORM_block1
:
19750 fprintf_unfiltered (f
, "block: size %s",
19751 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19753 case DW_FORM_exprloc
:
19754 fprintf_unfiltered (f
, "expression: size %s",
19755 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19757 case DW_FORM_ref_addr
:
19758 fprintf_unfiltered (f
, "ref address: ");
19759 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19761 case DW_FORM_GNU_ref_alt
:
19762 fprintf_unfiltered (f
, "alt ref address: ");
19763 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19769 case DW_FORM_ref_udata
:
19770 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19771 (long) (DW_UNSND (&die
->attrs
[i
])));
19773 case DW_FORM_data1
:
19774 case DW_FORM_data2
:
19775 case DW_FORM_data4
:
19776 case DW_FORM_data8
:
19777 case DW_FORM_udata
:
19778 case DW_FORM_sdata
:
19779 fprintf_unfiltered (f
, "constant: %s",
19780 pulongest (DW_UNSND (&die
->attrs
[i
])));
19782 case DW_FORM_sec_offset
:
19783 fprintf_unfiltered (f
, "section offset: %s",
19784 pulongest (DW_UNSND (&die
->attrs
[i
])));
19786 case DW_FORM_ref_sig8
:
19787 fprintf_unfiltered (f
, "signature: %s",
19788 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19790 case DW_FORM_string
:
19792 case DW_FORM_GNU_str_index
:
19793 case DW_FORM_GNU_strp_alt
:
19794 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19795 DW_STRING (&die
->attrs
[i
])
19796 ? DW_STRING (&die
->attrs
[i
]) : "",
19797 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19800 if (DW_UNSND (&die
->attrs
[i
]))
19801 fprintf_unfiltered (f
, "flag: TRUE");
19803 fprintf_unfiltered (f
, "flag: FALSE");
19805 case DW_FORM_flag_present
:
19806 fprintf_unfiltered (f
, "flag: TRUE");
19808 case DW_FORM_indirect
:
19809 /* The reader will have reduced the indirect form to
19810 the "base form" so this form should not occur. */
19811 fprintf_unfiltered (f
,
19812 "unexpected attribute form: DW_FORM_indirect");
19815 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19816 die
->attrs
[i
].form
);
19819 fprintf_unfiltered (f
, "\n");
19824 dump_die_for_error (struct die_info
*die
)
19826 dump_die_shallow (gdb_stderr
, 0, die
);
19830 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19832 int indent
= level
* 4;
19834 gdb_assert (die
!= NULL
);
19836 if (level
>= max_level
)
19839 dump_die_shallow (f
, indent
, die
);
19841 if (die
->child
!= NULL
)
19843 print_spaces (indent
, f
);
19844 fprintf_unfiltered (f
, " Children:");
19845 if (level
+ 1 < max_level
)
19847 fprintf_unfiltered (f
, "\n");
19848 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19852 fprintf_unfiltered (f
,
19853 " [not printed, max nesting level reached]\n");
19857 if (die
->sibling
!= NULL
&& level
> 0)
19859 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19863 /* This is called from the pdie macro in gdbinit.in.
19864 It's not static so gcc will keep a copy callable from gdb. */
19867 dump_die (struct die_info
*die
, int max_level
)
19869 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19873 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19877 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19883 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19887 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19889 sect_offset retval
= { DW_UNSND (attr
) };
19891 if (attr_form_is_ref (attr
))
19894 retval
.sect_off
= 0;
19895 complaint (&symfile_complaints
,
19896 _("unsupported die ref attribute form: '%s'"),
19897 dwarf_form_name (attr
->form
));
19901 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19902 * the value held by the attribute is not constant. */
19905 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19907 if (attr
->form
== DW_FORM_sdata
)
19908 return DW_SND (attr
);
19909 else if (attr
->form
== DW_FORM_udata
19910 || attr
->form
== DW_FORM_data1
19911 || attr
->form
== DW_FORM_data2
19912 || attr
->form
== DW_FORM_data4
19913 || attr
->form
== DW_FORM_data8
)
19914 return DW_UNSND (attr
);
19917 complaint (&symfile_complaints
,
19918 _("Attribute value is not a constant (%s)"),
19919 dwarf_form_name (attr
->form
));
19920 return default_value
;
19924 /* Follow reference or signature attribute ATTR of SRC_DIE.
19925 On entry *REF_CU is the CU of SRC_DIE.
19926 On exit *REF_CU is the CU of the result. */
19928 static struct die_info
*
19929 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19930 struct dwarf2_cu
**ref_cu
)
19932 struct die_info
*die
;
19934 if (attr_form_is_ref (attr
))
19935 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19936 else if (attr
->form
== DW_FORM_ref_sig8
)
19937 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19940 dump_die_for_error (src_die
);
19941 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19942 objfile_name ((*ref_cu
)->objfile
));
19948 /* Follow reference OFFSET.
19949 On entry *REF_CU is the CU of the source die referencing OFFSET.
19950 On exit *REF_CU is the CU of the result.
19951 Returns NULL if OFFSET is invalid. */
19953 static struct die_info
*
19954 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19955 struct dwarf2_cu
**ref_cu
)
19957 struct die_info temp_die
;
19958 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19960 gdb_assert (cu
->per_cu
!= NULL
);
19964 if (cu
->per_cu
->is_debug_types
)
19966 /* .debug_types CUs cannot reference anything outside their CU.
19967 If they need to, they have to reference a signatured type via
19968 DW_FORM_ref_sig8. */
19969 if (! offset_in_cu_p (&cu
->header
, offset
))
19972 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19973 || ! offset_in_cu_p (&cu
->header
, offset
))
19975 struct dwarf2_per_cu_data
*per_cu
;
19977 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19980 /* If necessary, add it to the queue and load its DIEs. */
19981 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19982 load_full_comp_unit (per_cu
, cu
->language
);
19984 target_cu
= per_cu
->cu
;
19986 else if (cu
->dies
== NULL
)
19988 /* We're loading full DIEs during partial symbol reading. */
19989 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19990 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19993 *ref_cu
= target_cu
;
19994 temp_die
.offset
= offset
;
19995 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19998 /* Follow reference attribute ATTR of SRC_DIE.
19999 On entry *REF_CU is the CU of SRC_DIE.
20000 On exit *REF_CU is the CU of the result. */
20002 static struct die_info
*
20003 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20004 struct dwarf2_cu
**ref_cu
)
20006 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20007 struct dwarf2_cu
*cu
= *ref_cu
;
20008 struct die_info
*die
;
20010 die
= follow_die_offset (offset
,
20011 (attr
->form
== DW_FORM_GNU_ref_alt
20012 || cu
->per_cu
->is_dwz
),
20015 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20016 "at 0x%x [in module %s]"),
20017 offset
.sect_off
, src_die
->offset
.sect_off
,
20018 objfile_name (cu
->objfile
));
20023 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20024 Returned value is intended for DW_OP_call*. Returned
20025 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20027 struct dwarf2_locexpr_baton
20028 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20029 struct dwarf2_per_cu_data
*per_cu
,
20030 CORE_ADDR (*get_frame_pc
) (void *baton
),
20033 struct dwarf2_cu
*cu
;
20034 struct die_info
*die
;
20035 struct attribute
*attr
;
20036 struct dwarf2_locexpr_baton retval
;
20038 dw2_setup (per_cu
->objfile
);
20040 if (per_cu
->cu
== NULL
)
20045 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20046 Instead just throw an error, not much else we can do. */
20047 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20048 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20051 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20053 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20054 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20056 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20059 /* DWARF: "If there is no such attribute, then there is no effect.".
20060 DATA is ignored if SIZE is 0. */
20062 retval
.data
= NULL
;
20065 else if (attr_form_is_section_offset (attr
))
20067 struct dwarf2_loclist_baton loclist_baton
;
20068 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20071 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20073 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20075 retval
.size
= size
;
20079 if (!attr_form_is_block (attr
))
20080 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20081 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20082 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20084 retval
.data
= DW_BLOCK (attr
)->data
;
20085 retval
.size
= DW_BLOCK (attr
)->size
;
20087 retval
.per_cu
= cu
->per_cu
;
20089 age_cached_comp_units ();
20094 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20097 struct dwarf2_locexpr_baton
20098 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20099 struct dwarf2_per_cu_data
*per_cu
,
20100 CORE_ADDR (*get_frame_pc
) (void *baton
),
20103 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20105 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20108 /* Write a constant of a given type as target-ordered bytes into
20111 static const gdb_byte
*
20112 write_constant_as_bytes (struct obstack
*obstack
,
20113 enum bfd_endian byte_order
,
20120 *len
= TYPE_LENGTH (type
);
20121 result
= obstack_alloc (obstack
, *len
);
20122 store_unsigned_integer (result
, *len
, byte_order
, value
);
20127 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20128 pointer to the constant bytes and set LEN to the length of the
20129 data. If memory is needed, allocate it on OBSTACK. If the DIE
20130 does not have a DW_AT_const_value, return NULL. */
20133 dwarf2_fetch_constant_bytes (sect_offset offset
,
20134 struct dwarf2_per_cu_data
*per_cu
,
20135 struct obstack
*obstack
,
20138 struct dwarf2_cu
*cu
;
20139 struct die_info
*die
;
20140 struct attribute
*attr
;
20141 const gdb_byte
*result
= NULL
;
20144 enum bfd_endian byte_order
;
20146 dw2_setup (per_cu
->objfile
);
20148 if (per_cu
->cu
== NULL
)
20153 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20154 Instead just throw an error, not much else we can do. */
20155 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20156 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20159 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20161 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20162 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20165 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20169 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20170 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20172 switch (attr
->form
)
20175 case DW_FORM_GNU_addr_index
:
20179 *len
= cu
->header
.addr_size
;
20180 tem
= obstack_alloc (obstack
, *len
);
20181 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20185 case DW_FORM_string
:
20187 case DW_FORM_GNU_str_index
:
20188 case DW_FORM_GNU_strp_alt
:
20189 /* DW_STRING is already allocated on the objfile obstack, point
20191 result
= (const gdb_byte
*) DW_STRING (attr
);
20192 *len
= strlen (DW_STRING (attr
));
20194 case DW_FORM_block1
:
20195 case DW_FORM_block2
:
20196 case DW_FORM_block4
:
20197 case DW_FORM_block
:
20198 case DW_FORM_exprloc
:
20199 result
= DW_BLOCK (attr
)->data
;
20200 *len
= DW_BLOCK (attr
)->size
;
20203 /* The DW_AT_const_value attributes are supposed to carry the
20204 symbol's value "represented as it would be on the target
20205 architecture." By the time we get here, it's already been
20206 converted to host endianness, so we just need to sign- or
20207 zero-extend it as appropriate. */
20208 case DW_FORM_data1
:
20209 type
= die_type (die
, cu
);
20210 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20211 if (result
== NULL
)
20212 result
= write_constant_as_bytes (obstack
, byte_order
,
20215 case DW_FORM_data2
:
20216 type
= die_type (die
, cu
);
20217 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20218 if (result
== NULL
)
20219 result
= write_constant_as_bytes (obstack
, byte_order
,
20222 case DW_FORM_data4
:
20223 type
= die_type (die
, cu
);
20224 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20225 if (result
== NULL
)
20226 result
= write_constant_as_bytes (obstack
, byte_order
,
20229 case DW_FORM_data8
:
20230 type
= die_type (die
, cu
);
20231 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20232 if (result
== NULL
)
20233 result
= write_constant_as_bytes (obstack
, byte_order
,
20237 case DW_FORM_sdata
:
20238 type
= die_type (die
, cu
);
20239 result
= write_constant_as_bytes (obstack
, byte_order
,
20240 type
, DW_SND (attr
), len
);
20243 case DW_FORM_udata
:
20244 type
= die_type (die
, cu
);
20245 result
= write_constant_as_bytes (obstack
, byte_order
,
20246 type
, DW_UNSND (attr
), len
);
20250 complaint (&symfile_complaints
,
20251 _("unsupported const value attribute form: '%s'"),
20252 dwarf_form_name (attr
->form
));
20259 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20263 dwarf2_get_die_type (cu_offset die_offset
,
20264 struct dwarf2_per_cu_data
*per_cu
)
20266 sect_offset die_offset_sect
;
20268 dw2_setup (per_cu
->objfile
);
20270 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20271 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20274 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20275 On entry *REF_CU is the CU of SRC_DIE.
20276 On exit *REF_CU is the CU of the result.
20277 Returns NULL if the referenced DIE isn't found. */
20279 static struct die_info
*
20280 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20281 struct dwarf2_cu
**ref_cu
)
20283 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20284 struct die_info temp_die
;
20285 struct dwarf2_cu
*sig_cu
;
20286 struct die_info
*die
;
20288 /* While it might be nice to assert sig_type->type == NULL here,
20289 we can get here for DW_AT_imported_declaration where we need
20290 the DIE not the type. */
20292 /* If necessary, add it to the queue and load its DIEs. */
20294 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20295 read_signatured_type (sig_type
);
20297 sig_cu
= sig_type
->per_cu
.cu
;
20298 gdb_assert (sig_cu
!= NULL
);
20299 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20300 temp_die
.offset
= sig_type
->type_offset_in_section
;
20301 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20302 temp_die
.offset
.sect_off
);
20305 /* For .gdb_index version 7 keep track of included TUs.
20306 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20307 if (dwarf2_per_objfile
->index_table
!= NULL
20308 && dwarf2_per_objfile
->index_table
->version
<= 7)
20310 VEC_safe_push (dwarf2_per_cu_ptr
,
20311 (*ref_cu
)->per_cu
->imported_symtabs
,
20322 /* Follow signatured type referenced by ATTR in SRC_DIE.
20323 On entry *REF_CU is the CU of SRC_DIE.
20324 On exit *REF_CU is the CU of the result.
20325 The result is the DIE of the type.
20326 If the referenced type cannot be found an error is thrown. */
20328 static struct die_info
*
20329 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20330 struct dwarf2_cu
**ref_cu
)
20332 ULONGEST signature
= DW_SIGNATURE (attr
);
20333 struct signatured_type
*sig_type
;
20334 struct die_info
*die
;
20336 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20338 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20339 /* sig_type will be NULL if the signatured type is missing from
20341 if (sig_type
== NULL
)
20343 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20344 " from DIE at 0x%x [in module %s]"),
20345 hex_string (signature
), src_die
->offset
.sect_off
,
20346 objfile_name ((*ref_cu
)->objfile
));
20349 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20352 dump_die_for_error (src_die
);
20353 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20354 " from DIE at 0x%x [in module %s]"),
20355 hex_string (signature
), src_die
->offset
.sect_off
,
20356 objfile_name ((*ref_cu
)->objfile
));
20362 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20363 reading in and processing the type unit if necessary. */
20365 static struct type
*
20366 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20367 struct dwarf2_cu
*cu
)
20369 struct signatured_type
*sig_type
;
20370 struct dwarf2_cu
*type_cu
;
20371 struct die_info
*type_die
;
20374 sig_type
= lookup_signatured_type (cu
, signature
);
20375 /* sig_type will be NULL if the signatured type is missing from
20377 if (sig_type
== NULL
)
20379 complaint (&symfile_complaints
,
20380 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20381 " from DIE at 0x%x [in module %s]"),
20382 hex_string (signature
), die
->offset
.sect_off
,
20383 objfile_name (dwarf2_per_objfile
->objfile
));
20384 return build_error_marker_type (cu
, die
);
20387 /* If we already know the type we're done. */
20388 if (sig_type
->type
!= NULL
)
20389 return sig_type
->type
;
20392 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20393 if (type_die
!= NULL
)
20395 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20396 is created. This is important, for example, because for c++ classes
20397 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20398 type
= read_type_die (type_die
, type_cu
);
20401 complaint (&symfile_complaints
,
20402 _("Dwarf Error: Cannot build signatured type %s"
20403 " referenced from DIE at 0x%x [in module %s]"),
20404 hex_string (signature
), die
->offset
.sect_off
,
20405 objfile_name (dwarf2_per_objfile
->objfile
));
20406 type
= build_error_marker_type (cu
, die
);
20411 complaint (&symfile_complaints
,
20412 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20413 " from DIE at 0x%x [in module %s]"),
20414 hex_string (signature
), die
->offset
.sect_off
,
20415 objfile_name (dwarf2_per_objfile
->objfile
));
20416 type
= build_error_marker_type (cu
, die
);
20418 sig_type
->type
= type
;
20423 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20424 reading in and processing the type unit if necessary. */
20426 static struct type
*
20427 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20428 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20430 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20431 if (attr_form_is_ref (attr
))
20433 struct dwarf2_cu
*type_cu
= cu
;
20434 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20436 return read_type_die (type_die
, type_cu
);
20438 else if (attr
->form
== DW_FORM_ref_sig8
)
20440 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20444 complaint (&symfile_complaints
,
20445 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20446 " at 0x%x [in module %s]"),
20447 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20448 objfile_name (dwarf2_per_objfile
->objfile
));
20449 return build_error_marker_type (cu
, die
);
20453 /* Load the DIEs associated with type unit PER_CU into memory. */
20456 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20458 struct signatured_type
*sig_type
;
20460 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20461 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20463 /* We have the per_cu, but we need the signatured_type.
20464 Fortunately this is an easy translation. */
20465 gdb_assert (per_cu
->is_debug_types
);
20466 sig_type
= (struct signatured_type
*) per_cu
;
20468 gdb_assert (per_cu
->cu
== NULL
);
20470 read_signatured_type (sig_type
);
20472 gdb_assert (per_cu
->cu
!= NULL
);
20475 /* die_reader_func for read_signatured_type.
20476 This is identical to load_full_comp_unit_reader,
20477 but is kept separate for now. */
20480 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20481 const gdb_byte
*info_ptr
,
20482 struct die_info
*comp_unit_die
,
20486 struct dwarf2_cu
*cu
= reader
->cu
;
20488 gdb_assert (cu
->die_hash
== NULL
);
20490 htab_create_alloc_ex (cu
->header
.length
/ 12,
20494 &cu
->comp_unit_obstack
,
20495 hashtab_obstack_allocate
,
20496 dummy_obstack_deallocate
);
20499 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20500 &info_ptr
, comp_unit_die
);
20501 cu
->dies
= comp_unit_die
;
20502 /* comp_unit_die is not stored in die_hash, no need. */
20504 /* We try not to read any attributes in this function, because not
20505 all CUs needed for references have been loaded yet, and symbol
20506 table processing isn't initialized. But we have to set the CU language,
20507 or we won't be able to build types correctly.
20508 Similarly, if we do not read the producer, we can not apply
20509 producer-specific interpretation. */
20510 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20513 /* Read in a signatured type and build its CU and DIEs.
20514 If the type is a stub for the real type in a DWO file,
20515 read in the real type from the DWO file as well. */
20518 read_signatured_type (struct signatured_type
*sig_type
)
20520 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20522 gdb_assert (per_cu
->is_debug_types
);
20523 gdb_assert (per_cu
->cu
== NULL
);
20525 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20526 read_signatured_type_reader
, NULL
);
20527 sig_type
->per_cu
.tu_read
= 1;
20530 /* Decode simple location descriptions.
20531 Given a pointer to a dwarf block that defines a location, compute
20532 the location and return the value.
20534 NOTE drow/2003-11-18: This function is called in two situations
20535 now: for the address of static or global variables (partial symbols
20536 only) and for offsets into structures which are expected to be
20537 (more or less) constant. The partial symbol case should go away,
20538 and only the constant case should remain. That will let this
20539 function complain more accurately. A few special modes are allowed
20540 without complaint for global variables (for instance, global
20541 register values and thread-local values).
20543 A location description containing no operations indicates that the
20544 object is optimized out. The return value is 0 for that case.
20545 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20546 callers will only want a very basic result and this can become a
20549 Note that stack[0] is unused except as a default error return. */
20552 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20554 struct objfile
*objfile
= cu
->objfile
;
20556 size_t size
= blk
->size
;
20557 const gdb_byte
*data
= blk
->data
;
20558 CORE_ADDR stack
[64];
20560 unsigned int bytes_read
, unsnd
;
20566 stack
[++stacki
] = 0;
20605 stack
[++stacki
] = op
- DW_OP_lit0
;
20640 stack
[++stacki
] = op
- DW_OP_reg0
;
20642 dwarf2_complex_location_expr_complaint ();
20646 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20648 stack
[++stacki
] = unsnd
;
20650 dwarf2_complex_location_expr_complaint ();
20654 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20659 case DW_OP_const1u
:
20660 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20664 case DW_OP_const1s
:
20665 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20669 case DW_OP_const2u
:
20670 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20674 case DW_OP_const2s
:
20675 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20679 case DW_OP_const4u
:
20680 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20684 case DW_OP_const4s
:
20685 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20689 case DW_OP_const8u
:
20690 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20695 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20701 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20706 stack
[stacki
+ 1] = stack
[stacki
];
20711 stack
[stacki
- 1] += stack
[stacki
];
20715 case DW_OP_plus_uconst
:
20716 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20722 stack
[stacki
- 1] -= stack
[stacki
];
20727 /* If we're not the last op, then we definitely can't encode
20728 this using GDB's address_class enum. This is valid for partial
20729 global symbols, although the variable's address will be bogus
20732 dwarf2_complex_location_expr_complaint ();
20735 case DW_OP_GNU_push_tls_address
:
20736 /* The top of the stack has the offset from the beginning
20737 of the thread control block at which the variable is located. */
20738 /* Nothing should follow this operator, so the top of stack would
20740 /* This is valid for partial global symbols, but the variable's
20741 address will be bogus in the psymtab. Make it always at least
20742 non-zero to not look as a variable garbage collected by linker
20743 which have DW_OP_addr 0. */
20745 dwarf2_complex_location_expr_complaint ();
20749 case DW_OP_GNU_uninit
:
20752 case DW_OP_GNU_addr_index
:
20753 case DW_OP_GNU_const_index
:
20754 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20761 const char *name
= get_DW_OP_name (op
);
20764 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20767 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20771 return (stack
[stacki
]);
20774 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20775 outside of the allocated space. Also enforce minimum>0. */
20776 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20778 complaint (&symfile_complaints
,
20779 _("location description stack overflow"));
20785 complaint (&symfile_complaints
,
20786 _("location description stack underflow"));
20790 return (stack
[stacki
]);
20793 /* memory allocation interface */
20795 static struct dwarf_block
*
20796 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20798 struct dwarf_block
*blk
;
20800 blk
= (struct dwarf_block
*)
20801 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20805 static struct die_info
*
20806 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20808 struct die_info
*die
;
20809 size_t size
= sizeof (struct die_info
);
20812 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20814 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20815 memset (die
, 0, sizeof (struct die_info
));
20820 /* Macro support. */
20822 /* Return file name relative to the compilation directory of file number I in
20823 *LH's file name table. The result is allocated using xmalloc; the caller is
20824 responsible for freeing it. */
20827 file_file_name (int file
, struct line_header
*lh
)
20829 /* Is the file number a valid index into the line header's file name
20830 table? Remember that file numbers start with one, not zero. */
20831 if (1 <= file
&& file
<= lh
->num_file_names
)
20833 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20835 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20836 || lh
->include_dirs
== NULL
)
20837 return xstrdup (fe
->name
);
20838 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20843 /* The compiler produced a bogus file number. We can at least
20844 record the macro definitions made in the file, even if we
20845 won't be able to find the file by name. */
20846 char fake_name
[80];
20848 xsnprintf (fake_name
, sizeof (fake_name
),
20849 "<bad macro file number %d>", file
);
20851 complaint (&symfile_complaints
,
20852 _("bad file number in macro information (%d)"),
20855 return xstrdup (fake_name
);
20859 /* Return the full name of file number I in *LH's file name table.
20860 Use COMP_DIR as the name of the current directory of the
20861 compilation. The result is allocated using xmalloc; the caller is
20862 responsible for freeing it. */
20864 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20866 /* Is the file number a valid index into the line header's file name
20867 table? Remember that file numbers start with one, not zero. */
20868 if (1 <= file
&& file
<= lh
->num_file_names
)
20870 char *relative
= file_file_name (file
, lh
);
20872 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20874 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20877 return file_file_name (file
, lh
);
20881 static struct macro_source_file
*
20882 macro_start_file (int file
, int line
,
20883 struct macro_source_file
*current_file
,
20884 struct line_header
*lh
)
20886 /* File name relative to the compilation directory of this source file. */
20887 char *file_name
= file_file_name (file
, lh
);
20889 if (! current_file
)
20891 /* Note: We don't create a macro table for this compilation unit
20892 at all until we actually get a filename. */
20893 struct macro_table
*macro_table
= get_macro_table ();
20895 /* If we have no current file, then this must be the start_file
20896 directive for the compilation unit's main source file. */
20897 current_file
= macro_set_main (macro_table
, file_name
);
20898 macro_define_special (macro_table
);
20901 current_file
= macro_include (current_file
, line
, file_name
);
20905 return current_file
;
20909 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20910 followed by a null byte. */
20912 copy_string (const char *buf
, int len
)
20914 char *s
= xmalloc (len
+ 1);
20916 memcpy (s
, buf
, len
);
20922 static const char *
20923 consume_improper_spaces (const char *p
, const char *body
)
20927 complaint (&symfile_complaints
,
20928 _("macro definition contains spaces "
20929 "in formal argument list:\n`%s'"),
20941 parse_macro_definition (struct macro_source_file
*file
, int line
,
20946 /* The body string takes one of two forms. For object-like macro
20947 definitions, it should be:
20949 <macro name> " " <definition>
20951 For function-like macro definitions, it should be:
20953 <macro name> "() " <definition>
20955 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20957 Spaces may appear only where explicitly indicated, and in the
20960 The Dwarf 2 spec says that an object-like macro's name is always
20961 followed by a space, but versions of GCC around March 2002 omit
20962 the space when the macro's definition is the empty string.
20964 The Dwarf 2 spec says that there should be no spaces between the
20965 formal arguments in a function-like macro's formal argument list,
20966 but versions of GCC around March 2002 include spaces after the
20970 /* Find the extent of the macro name. The macro name is terminated
20971 by either a space or null character (for an object-like macro) or
20972 an opening paren (for a function-like macro). */
20973 for (p
= body
; *p
; p
++)
20974 if (*p
== ' ' || *p
== '(')
20977 if (*p
== ' ' || *p
== '\0')
20979 /* It's an object-like macro. */
20980 int name_len
= p
- body
;
20981 char *name
= copy_string (body
, name_len
);
20982 const char *replacement
;
20985 replacement
= body
+ name_len
+ 1;
20988 dwarf2_macro_malformed_definition_complaint (body
);
20989 replacement
= body
+ name_len
;
20992 macro_define_object (file
, line
, name
, replacement
);
20996 else if (*p
== '(')
20998 /* It's a function-like macro. */
20999 char *name
= copy_string (body
, p
- body
);
21002 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
21006 p
= consume_improper_spaces (p
, body
);
21008 /* Parse the formal argument list. */
21009 while (*p
&& *p
!= ')')
21011 /* Find the extent of the current argument name. */
21012 const char *arg_start
= p
;
21014 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21017 if (! *p
|| p
== arg_start
)
21018 dwarf2_macro_malformed_definition_complaint (body
);
21021 /* Make sure argv has room for the new argument. */
21022 if (argc
>= argv_size
)
21025 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
21028 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21031 p
= consume_improper_spaces (p
, body
);
21033 /* Consume the comma, if present. */
21038 p
= consume_improper_spaces (p
, body
);
21047 /* Perfectly formed definition, no complaints. */
21048 macro_define_function (file
, line
, name
,
21049 argc
, (const char **) argv
,
21051 else if (*p
== '\0')
21053 /* Complain, but do define it. */
21054 dwarf2_macro_malformed_definition_complaint (body
);
21055 macro_define_function (file
, line
, name
,
21056 argc
, (const char **) argv
,
21060 /* Just complain. */
21061 dwarf2_macro_malformed_definition_complaint (body
);
21064 /* Just complain. */
21065 dwarf2_macro_malformed_definition_complaint (body
);
21071 for (i
= 0; i
< argc
; i
++)
21077 dwarf2_macro_malformed_definition_complaint (body
);
21080 /* Skip some bytes from BYTES according to the form given in FORM.
21081 Returns the new pointer. */
21083 static const gdb_byte
*
21084 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21085 enum dwarf_form form
,
21086 unsigned int offset_size
,
21087 struct dwarf2_section_info
*section
)
21089 unsigned int bytes_read
;
21093 case DW_FORM_data1
:
21098 case DW_FORM_data2
:
21102 case DW_FORM_data4
:
21106 case DW_FORM_data8
:
21110 case DW_FORM_string
:
21111 read_direct_string (abfd
, bytes
, &bytes_read
);
21112 bytes
+= bytes_read
;
21115 case DW_FORM_sec_offset
:
21117 case DW_FORM_GNU_strp_alt
:
21118 bytes
+= offset_size
;
21121 case DW_FORM_block
:
21122 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21123 bytes
+= bytes_read
;
21126 case DW_FORM_block1
:
21127 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21129 case DW_FORM_block2
:
21130 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21132 case DW_FORM_block4
:
21133 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21136 case DW_FORM_sdata
:
21137 case DW_FORM_udata
:
21138 case DW_FORM_GNU_addr_index
:
21139 case DW_FORM_GNU_str_index
:
21140 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21143 dwarf2_section_buffer_overflow_complaint (section
);
21151 complaint (&symfile_complaints
,
21152 _("invalid form 0x%x in `%s'"),
21153 form
, get_section_name (section
));
21161 /* A helper for dwarf_decode_macros that handles skipping an unknown
21162 opcode. Returns an updated pointer to the macro data buffer; or,
21163 on error, issues a complaint and returns NULL. */
21165 static const gdb_byte
*
21166 skip_unknown_opcode (unsigned int opcode
,
21167 const gdb_byte
**opcode_definitions
,
21168 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21170 unsigned int offset_size
,
21171 struct dwarf2_section_info
*section
)
21173 unsigned int bytes_read
, i
;
21175 const gdb_byte
*defn
;
21177 if (opcode_definitions
[opcode
] == NULL
)
21179 complaint (&symfile_complaints
,
21180 _("unrecognized DW_MACFINO opcode 0x%x"),
21185 defn
= opcode_definitions
[opcode
];
21186 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21187 defn
+= bytes_read
;
21189 for (i
= 0; i
< arg
; ++i
)
21191 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21192 (enum dwarf_form
) defn
[i
], offset_size
,
21194 if (mac_ptr
== NULL
)
21196 /* skip_form_bytes already issued the complaint. */
21204 /* A helper function which parses the header of a macro section.
21205 If the macro section is the extended (for now called "GNU") type,
21206 then this updates *OFFSET_SIZE. Returns a pointer to just after
21207 the header, or issues a complaint and returns NULL on error. */
21209 static const gdb_byte
*
21210 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21212 const gdb_byte
*mac_ptr
,
21213 unsigned int *offset_size
,
21214 int section_is_gnu
)
21216 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21218 if (section_is_gnu
)
21220 unsigned int version
, flags
;
21222 version
= read_2_bytes (abfd
, mac_ptr
);
21225 complaint (&symfile_complaints
,
21226 _("unrecognized version `%d' in .debug_macro section"),
21232 flags
= read_1_byte (abfd
, mac_ptr
);
21234 *offset_size
= (flags
& 1) ? 8 : 4;
21236 if ((flags
& 2) != 0)
21237 /* We don't need the line table offset. */
21238 mac_ptr
+= *offset_size
;
21240 /* Vendor opcode descriptions. */
21241 if ((flags
& 4) != 0)
21243 unsigned int i
, count
;
21245 count
= read_1_byte (abfd
, mac_ptr
);
21247 for (i
= 0; i
< count
; ++i
)
21249 unsigned int opcode
, bytes_read
;
21252 opcode
= read_1_byte (abfd
, mac_ptr
);
21254 opcode_definitions
[opcode
] = mac_ptr
;
21255 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21256 mac_ptr
+= bytes_read
;
21265 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21266 including DW_MACRO_GNU_transparent_include. */
21269 dwarf_decode_macro_bytes (bfd
*abfd
,
21270 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21271 struct macro_source_file
*current_file
,
21272 struct line_header
*lh
,
21273 struct dwarf2_section_info
*section
,
21274 int section_is_gnu
, int section_is_dwz
,
21275 unsigned int offset_size
,
21276 htab_t include_hash
)
21278 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21279 enum dwarf_macro_record_type macinfo_type
;
21280 int at_commandline
;
21281 const gdb_byte
*opcode_definitions
[256];
21283 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21284 &offset_size
, section_is_gnu
);
21285 if (mac_ptr
== NULL
)
21287 /* We already issued a complaint. */
21291 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21292 GDB is still reading the definitions from command line. First
21293 DW_MACINFO_start_file will need to be ignored as it was already executed
21294 to create CURRENT_FILE for the main source holding also the command line
21295 definitions. On first met DW_MACINFO_start_file this flag is reset to
21296 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21298 at_commandline
= 1;
21302 /* Do we at least have room for a macinfo type byte? */
21303 if (mac_ptr
>= mac_end
)
21305 dwarf2_section_buffer_overflow_complaint (section
);
21309 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21312 /* Note that we rely on the fact that the corresponding GNU and
21313 DWARF constants are the same. */
21314 switch (macinfo_type
)
21316 /* A zero macinfo type indicates the end of the macro
21321 case DW_MACRO_GNU_define
:
21322 case DW_MACRO_GNU_undef
:
21323 case DW_MACRO_GNU_define_indirect
:
21324 case DW_MACRO_GNU_undef_indirect
:
21325 case DW_MACRO_GNU_define_indirect_alt
:
21326 case DW_MACRO_GNU_undef_indirect_alt
:
21328 unsigned int bytes_read
;
21333 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21334 mac_ptr
+= bytes_read
;
21336 if (macinfo_type
== DW_MACRO_GNU_define
21337 || macinfo_type
== DW_MACRO_GNU_undef
)
21339 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21340 mac_ptr
+= bytes_read
;
21344 LONGEST str_offset
;
21346 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21347 mac_ptr
+= offset_size
;
21349 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21350 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21353 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21355 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21358 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21361 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21362 || macinfo_type
== DW_MACRO_GNU_define_indirect
21363 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21364 if (! current_file
)
21366 /* DWARF violation as no main source is present. */
21367 complaint (&symfile_complaints
,
21368 _("debug info with no main source gives macro %s "
21370 is_define
? _("definition") : _("undefinition"),
21374 if ((line
== 0 && !at_commandline
)
21375 || (line
!= 0 && at_commandline
))
21376 complaint (&symfile_complaints
,
21377 _("debug info gives %s macro %s with %s line %d: %s"),
21378 at_commandline
? _("command-line") : _("in-file"),
21379 is_define
? _("definition") : _("undefinition"),
21380 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21383 parse_macro_definition (current_file
, line
, body
);
21386 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21387 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21388 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21389 macro_undef (current_file
, line
, body
);
21394 case DW_MACRO_GNU_start_file
:
21396 unsigned int bytes_read
;
21399 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21400 mac_ptr
+= bytes_read
;
21401 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21402 mac_ptr
+= bytes_read
;
21404 if ((line
== 0 && !at_commandline
)
21405 || (line
!= 0 && at_commandline
))
21406 complaint (&symfile_complaints
,
21407 _("debug info gives source %d included "
21408 "from %s at %s line %d"),
21409 file
, at_commandline
? _("command-line") : _("file"),
21410 line
== 0 ? _("zero") : _("non-zero"), line
);
21412 if (at_commandline
)
21414 /* This DW_MACRO_GNU_start_file was executed in the
21416 at_commandline
= 0;
21419 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21423 case DW_MACRO_GNU_end_file
:
21424 if (! current_file
)
21425 complaint (&symfile_complaints
,
21426 _("macro debug info has an unmatched "
21427 "`close_file' directive"));
21430 current_file
= current_file
->included_by
;
21431 if (! current_file
)
21433 enum dwarf_macro_record_type next_type
;
21435 /* GCC circa March 2002 doesn't produce the zero
21436 type byte marking the end of the compilation
21437 unit. Complain if it's not there, but exit no
21440 /* Do we at least have room for a macinfo type byte? */
21441 if (mac_ptr
>= mac_end
)
21443 dwarf2_section_buffer_overflow_complaint (section
);
21447 /* We don't increment mac_ptr here, so this is just
21450 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21452 if (next_type
!= 0)
21453 complaint (&symfile_complaints
,
21454 _("no terminating 0-type entry for "
21455 "macros in `.debug_macinfo' section"));
21462 case DW_MACRO_GNU_transparent_include
:
21463 case DW_MACRO_GNU_transparent_include_alt
:
21467 bfd
*include_bfd
= abfd
;
21468 struct dwarf2_section_info
*include_section
= section
;
21469 struct dwarf2_section_info alt_section
;
21470 const gdb_byte
*include_mac_end
= mac_end
;
21471 int is_dwz
= section_is_dwz
;
21472 const gdb_byte
*new_mac_ptr
;
21474 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21475 mac_ptr
+= offset_size
;
21477 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21479 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21481 dwarf2_read_section (objfile
, &dwz
->macro
);
21483 include_section
= &dwz
->macro
;
21484 include_bfd
= get_section_bfd_owner (include_section
);
21485 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21489 new_mac_ptr
= include_section
->buffer
+ offset
;
21490 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21494 /* This has actually happened; see
21495 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21496 complaint (&symfile_complaints
,
21497 _("recursive DW_MACRO_GNU_transparent_include in "
21498 ".debug_macro section"));
21502 *slot
= (void *) new_mac_ptr
;
21504 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21505 include_mac_end
, current_file
, lh
,
21506 section
, section_is_gnu
, is_dwz
,
21507 offset_size
, include_hash
);
21509 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21514 case DW_MACINFO_vendor_ext
:
21515 if (!section_is_gnu
)
21517 unsigned int bytes_read
;
21520 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21521 mac_ptr
+= bytes_read
;
21522 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21523 mac_ptr
+= bytes_read
;
21525 /* We don't recognize any vendor extensions. */
21531 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21532 mac_ptr
, mac_end
, abfd
, offset_size
,
21534 if (mac_ptr
== NULL
)
21538 } while (macinfo_type
!= 0);
21542 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21543 int section_is_gnu
)
21545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21546 struct line_header
*lh
= cu
->line_header
;
21548 const gdb_byte
*mac_ptr
, *mac_end
;
21549 struct macro_source_file
*current_file
= 0;
21550 enum dwarf_macro_record_type macinfo_type
;
21551 unsigned int offset_size
= cu
->header
.offset_size
;
21552 const gdb_byte
*opcode_definitions
[256];
21553 struct cleanup
*cleanup
;
21554 htab_t include_hash
;
21556 struct dwarf2_section_info
*section
;
21557 const char *section_name
;
21559 if (cu
->dwo_unit
!= NULL
)
21561 if (section_is_gnu
)
21563 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21564 section_name
= ".debug_macro.dwo";
21568 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21569 section_name
= ".debug_macinfo.dwo";
21574 if (section_is_gnu
)
21576 section
= &dwarf2_per_objfile
->macro
;
21577 section_name
= ".debug_macro";
21581 section
= &dwarf2_per_objfile
->macinfo
;
21582 section_name
= ".debug_macinfo";
21586 dwarf2_read_section (objfile
, section
);
21587 if (section
->buffer
== NULL
)
21589 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21592 abfd
= get_section_bfd_owner (section
);
21594 /* First pass: Find the name of the base filename.
21595 This filename is needed in order to process all macros whose definition
21596 (or undefinition) comes from the command line. These macros are defined
21597 before the first DW_MACINFO_start_file entry, and yet still need to be
21598 associated to the base file.
21600 To determine the base file name, we scan the macro definitions until we
21601 reach the first DW_MACINFO_start_file entry. We then initialize
21602 CURRENT_FILE accordingly so that any macro definition found before the
21603 first DW_MACINFO_start_file can still be associated to the base file. */
21605 mac_ptr
= section
->buffer
+ offset
;
21606 mac_end
= section
->buffer
+ section
->size
;
21608 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21609 &offset_size
, section_is_gnu
);
21610 if (mac_ptr
== NULL
)
21612 /* We already issued a complaint. */
21618 /* Do we at least have room for a macinfo type byte? */
21619 if (mac_ptr
>= mac_end
)
21621 /* Complaint is printed during the second pass as GDB will probably
21622 stop the first pass earlier upon finding
21623 DW_MACINFO_start_file. */
21627 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21630 /* Note that we rely on the fact that the corresponding GNU and
21631 DWARF constants are the same. */
21632 switch (macinfo_type
)
21634 /* A zero macinfo type indicates the end of the macro
21639 case DW_MACRO_GNU_define
:
21640 case DW_MACRO_GNU_undef
:
21641 /* Only skip the data by MAC_PTR. */
21643 unsigned int bytes_read
;
21645 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21646 mac_ptr
+= bytes_read
;
21647 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21648 mac_ptr
+= bytes_read
;
21652 case DW_MACRO_GNU_start_file
:
21654 unsigned int bytes_read
;
21657 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21658 mac_ptr
+= bytes_read
;
21659 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21660 mac_ptr
+= bytes_read
;
21662 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21666 case DW_MACRO_GNU_end_file
:
21667 /* No data to skip by MAC_PTR. */
21670 case DW_MACRO_GNU_define_indirect
:
21671 case DW_MACRO_GNU_undef_indirect
:
21672 case DW_MACRO_GNU_define_indirect_alt
:
21673 case DW_MACRO_GNU_undef_indirect_alt
:
21675 unsigned int bytes_read
;
21677 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21678 mac_ptr
+= bytes_read
;
21679 mac_ptr
+= offset_size
;
21683 case DW_MACRO_GNU_transparent_include
:
21684 case DW_MACRO_GNU_transparent_include_alt
:
21685 /* Note that, according to the spec, a transparent include
21686 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21687 skip this opcode. */
21688 mac_ptr
+= offset_size
;
21691 case DW_MACINFO_vendor_ext
:
21692 /* Only skip the data by MAC_PTR. */
21693 if (!section_is_gnu
)
21695 unsigned int bytes_read
;
21697 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21698 mac_ptr
+= bytes_read
;
21699 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21700 mac_ptr
+= bytes_read
;
21705 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21706 mac_ptr
, mac_end
, abfd
, offset_size
,
21708 if (mac_ptr
== NULL
)
21712 } while (macinfo_type
!= 0 && current_file
== NULL
);
21714 /* Second pass: Process all entries.
21716 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21717 command-line macro definitions/undefinitions. This flag is unset when we
21718 reach the first DW_MACINFO_start_file entry. */
21720 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21721 NULL
, xcalloc
, xfree
);
21722 cleanup
= make_cleanup_htab_delete (include_hash
);
21723 mac_ptr
= section
->buffer
+ offset
;
21724 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21725 *slot
= (void *) mac_ptr
;
21726 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21727 current_file
, lh
, section
,
21728 section_is_gnu
, 0, offset_size
, include_hash
);
21729 do_cleanups (cleanup
);
21732 /* Check if the attribute's form is a DW_FORM_block*
21733 if so return true else false. */
21736 attr_form_is_block (const struct attribute
*attr
)
21738 return (attr
== NULL
? 0 :
21739 attr
->form
== DW_FORM_block1
21740 || attr
->form
== DW_FORM_block2
21741 || attr
->form
== DW_FORM_block4
21742 || attr
->form
== DW_FORM_block
21743 || attr
->form
== DW_FORM_exprloc
);
21746 /* Return non-zero if ATTR's value is a section offset --- classes
21747 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21748 You may use DW_UNSND (attr) to retrieve such offsets.
21750 Section 7.5.4, "Attribute Encodings", explains that no attribute
21751 may have a value that belongs to more than one of these classes; it
21752 would be ambiguous if we did, because we use the same forms for all
21756 attr_form_is_section_offset (const struct attribute
*attr
)
21758 return (attr
->form
== DW_FORM_data4
21759 || attr
->form
== DW_FORM_data8
21760 || attr
->form
== DW_FORM_sec_offset
);
21763 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21764 zero otherwise. When this function returns true, you can apply
21765 dwarf2_get_attr_constant_value to it.
21767 However, note that for some attributes you must check
21768 attr_form_is_section_offset before using this test. DW_FORM_data4
21769 and DW_FORM_data8 are members of both the constant class, and of
21770 the classes that contain offsets into other debug sections
21771 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21772 that, if an attribute's can be either a constant or one of the
21773 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21774 taken as section offsets, not constants. */
21777 attr_form_is_constant (const struct attribute
*attr
)
21779 switch (attr
->form
)
21781 case DW_FORM_sdata
:
21782 case DW_FORM_udata
:
21783 case DW_FORM_data1
:
21784 case DW_FORM_data2
:
21785 case DW_FORM_data4
:
21786 case DW_FORM_data8
:
21794 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21795 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21798 attr_form_is_ref (const struct attribute
*attr
)
21800 switch (attr
->form
)
21802 case DW_FORM_ref_addr
:
21807 case DW_FORM_ref_udata
:
21808 case DW_FORM_GNU_ref_alt
:
21815 /* Return the .debug_loc section to use for CU.
21816 For DWO files use .debug_loc.dwo. */
21818 static struct dwarf2_section_info
*
21819 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21822 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21823 return &dwarf2_per_objfile
->loc
;
21826 /* A helper function that fills in a dwarf2_loclist_baton. */
21829 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21830 struct dwarf2_loclist_baton
*baton
,
21831 const struct attribute
*attr
)
21833 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21835 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21837 baton
->per_cu
= cu
->per_cu
;
21838 gdb_assert (baton
->per_cu
);
21839 /* We don't know how long the location list is, but make sure we
21840 don't run off the edge of the section. */
21841 baton
->size
= section
->size
- DW_UNSND (attr
);
21842 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21843 baton
->base_address
= cu
->base_address
;
21844 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21848 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21849 struct dwarf2_cu
*cu
, int is_block
)
21851 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21852 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21854 if (attr_form_is_section_offset (attr
)
21855 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21856 the section. If so, fall through to the complaint in the
21858 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21860 struct dwarf2_loclist_baton
*baton
;
21862 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21863 sizeof (struct dwarf2_loclist_baton
));
21865 fill_in_loclist_baton (cu
, baton
, attr
);
21867 if (cu
->base_known
== 0)
21868 complaint (&symfile_complaints
,
21869 _("Location list used without "
21870 "specifying the CU base address."));
21872 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21873 ? dwarf2_loclist_block_index
21874 : dwarf2_loclist_index
);
21875 SYMBOL_LOCATION_BATON (sym
) = baton
;
21879 struct dwarf2_locexpr_baton
*baton
;
21881 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21882 sizeof (struct dwarf2_locexpr_baton
));
21883 baton
->per_cu
= cu
->per_cu
;
21884 gdb_assert (baton
->per_cu
);
21886 if (attr_form_is_block (attr
))
21888 /* Note that we're just copying the block's data pointer
21889 here, not the actual data. We're still pointing into the
21890 info_buffer for SYM's objfile; right now we never release
21891 that buffer, but when we do clean up properly this may
21893 baton
->size
= DW_BLOCK (attr
)->size
;
21894 baton
->data
= DW_BLOCK (attr
)->data
;
21898 dwarf2_invalid_attrib_class_complaint ("location description",
21899 SYMBOL_NATURAL_NAME (sym
));
21903 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21904 ? dwarf2_locexpr_block_index
21905 : dwarf2_locexpr_index
);
21906 SYMBOL_LOCATION_BATON (sym
) = baton
;
21910 /* Return the OBJFILE associated with the compilation unit CU. If CU
21911 came from a separate debuginfo file, then the master objfile is
21915 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21917 struct objfile
*objfile
= per_cu
->objfile
;
21919 /* Return the master objfile, so that we can report and look up the
21920 correct file containing this variable. */
21921 if (objfile
->separate_debug_objfile_backlink
)
21922 objfile
= objfile
->separate_debug_objfile_backlink
;
21927 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21928 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21929 CU_HEADERP first. */
21931 static const struct comp_unit_head
*
21932 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21933 struct dwarf2_per_cu_data
*per_cu
)
21935 const gdb_byte
*info_ptr
;
21938 return &per_cu
->cu
->header
;
21940 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21942 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21943 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21948 /* Return the address size given in the compilation unit header for CU. */
21951 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21953 struct comp_unit_head cu_header_local
;
21954 const struct comp_unit_head
*cu_headerp
;
21956 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21958 return cu_headerp
->addr_size
;
21961 /* Return the offset size given in the compilation unit header for CU. */
21964 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21966 struct comp_unit_head cu_header_local
;
21967 const struct comp_unit_head
*cu_headerp
;
21969 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21971 return cu_headerp
->offset_size
;
21974 /* See its dwarf2loc.h declaration. */
21977 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21979 struct comp_unit_head cu_header_local
;
21980 const struct comp_unit_head
*cu_headerp
;
21982 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21984 if (cu_headerp
->version
== 2)
21985 return cu_headerp
->addr_size
;
21987 return cu_headerp
->offset_size
;
21990 /* Return the text offset of the CU. The returned offset comes from
21991 this CU's objfile. If this objfile came from a separate debuginfo
21992 file, then the offset may be different from the corresponding
21993 offset in the parent objfile. */
21996 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21998 struct objfile
*objfile
= per_cu
->objfile
;
22000 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22003 /* Locate the .debug_info compilation unit from CU's objfile which contains
22004 the DIE at OFFSET. Raises an error on failure. */
22006 static struct dwarf2_per_cu_data
*
22007 dwarf2_find_containing_comp_unit (sect_offset offset
,
22008 unsigned int offset_in_dwz
,
22009 struct objfile
*objfile
)
22011 struct dwarf2_per_cu_data
*this_cu
;
22013 const sect_offset
*cu_off
;
22016 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22019 struct dwarf2_per_cu_data
*mid_cu
;
22020 int mid
= low
+ (high
- low
) / 2;
22022 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22023 cu_off
= &mid_cu
->offset
;
22024 if (mid_cu
->is_dwz
> offset_in_dwz
22025 || (mid_cu
->is_dwz
== offset_in_dwz
22026 && cu_off
->sect_off
>= offset
.sect_off
))
22031 gdb_assert (low
== high
);
22032 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22033 cu_off
= &this_cu
->offset
;
22034 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22036 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22037 error (_("Dwarf Error: could not find partial DIE containing "
22038 "offset 0x%lx [in module %s]"),
22039 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22041 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22042 <= offset
.sect_off
);
22043 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22047 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22048 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22049 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22050 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22051 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22056 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22059 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22061 memset (cu
, 0, sizeof (*cu
));
22063 cu
->per_cu
= per_cu
;
22064 cu
->objfile
= per_cu
->objfile
;
22065 obstack_init (&cu
->comp_unit_obstack
);
22068 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22071 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22072 enum language pretend_language
)
22074 struct attribute
*attr
;
22076 /* Set the language we're debugging. */
22077 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22079 set_cu_language (DW_UNSND (attr
), cu
);
22082 cu
->language
= pretend_language
;
22083 cu
->language_defn
= language_def (cu
->language
);
22086 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
22088 cu
->producer
= DW_STRING (attr
);
22091 /* Release one cached compilation unit, CU. We unlink it from the tree
22092 of compilation units, but we don't remove it from the read_in_chain;
22093 the caller is responsible for that.
22094 NOTE: DATA is a void * because this function is also used as a
22095 cleanup routine. */
22098 free_heap_comp_unit (void *data
)
22100 struct dwarf2_cu
*cu
= data
;
22102 gdb_assert (cu
->per_cu
!= NULL
);
22103 cu
->per_cu
->cu
= NULL
;
22106 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22111 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22112 when we're finished with it. We can't free the pointer itself, but be
22113 sure to unlink it from the cache. Also release any associated storage. */
22116 free_stack_comp_unit (void *data
)
22118 struct dwarf2_cu
*cu
= data
;
22120 gdb_assert (cu
->per_cu
!= NULL
);
22121 cu
->per_cu
->cu
= NULL
;
22124 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22125 cu
->partial_dies
= NULL
;
22128 /* Free all cached compilation units. */
22131 free_cached_comp_units (void *data
)
22133 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22135 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22136 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22137 while (per_cu
!= NULL
)
22139 struct dwarf2_per_cu_data
*next_cu
;
22141 next_cu
= per_cu
->cu
->read_in_chain
;
22143 free_heap_comp_unit (per_cu
->cu
);
22144 *last_chain
= next_cu
;
22150 /* Increase the age counter on each cached compilation unit, and free
22151 any that are too old. */
22154 age_cached_comp_units (void)
22156 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22158 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22159 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22160 while (per_cu
!= NULL
)
22162 per_cu
->cu
->last_used
++;
22163 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22164 dwarf2_mark (per_cu
->cu
);
22165 per_cu
= per_cu
->cu
->read_in_chain
;
22168 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22169 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22170 while (per_cu
!= NULL
)
22172 struct dwarf2_per_cu_data
*next_cu
;
22174 next_cu
= per_cu
->cu
->read_in_chain
;
22176 if (!per_cu
->cu
->mark
)
22178 free_heap_comp_unit (per_cu
->cu
);
22179 *last_chain
= next_cu
;
22182 last_chain
= &per_cu
->cu
->read_in_chain
;
22188 /* Remove a single compilation unit from the cache. */
22191 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22193 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22195 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22196 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22197 while (per_cu
!= NULL
)
22199 struct dwarf2_per_cu_data
*next_cu
;
22201 next_cu
= per_cu
->cu
->read_in_chain
;
22203 if (per_cu
== target_per_cu
)
22205 free_heap_comp_unit (per_cu
->cu
);
22207 *last_chain
= next_cu
;
22211 last_chain
= &per_cu
->cu
->read_in_chain
;
22217 /* Release all extra memory associated with OBJFILE. */
22220 dwarf2_free_objfile (struct objfile
*objfile
)
22222 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22224 if (dwarf2_per_objfile
== NULL
)
22227 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22228 free_cached_comp_units (NULL
);
22230 if (dwarf2_per_objfile
->quick_file_names_table
)
22231 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22233 if (dwarf2_per_objfile
->line_header_hash
)
22234 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22236 /* Everything else should be on the objfile obstack. */
22239 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22240 We store these in a hash table separate from the DIEs, and preserve them
22241 when the DIEs are flushed out of cache.
22243 The CU "per_cu" pointer is needed because offset alone is not enough to
22244 uniquely identify the type. A file may have multiple .debug_types sections,
22245 or the type may come from a DWO file. Furthermore, while it's more logical
22246 to use per_cu->section+offset, with Fission the section with the data is in
22247 the DWO file but we don't know that section at the point we need it.
22248 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22249 because we can enter the lookup routine, get_die_type_at_offset, from
22250 outside this file, and thus won't necessarily have PER_CU->cu.
22251 Fortunately, PER_CU is stable for the life of the objfile. */
22253 struct dwarf2_per_cu_offset_and_type
22255 const struct dwarf2_per_cu_data
*per_cu
;
22256 sect_offset offset
;
22260 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22263 per_cu_offset_and_type_hash (const void *item
)
22265 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22267 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22270 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22273 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22275 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22276 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22278 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22279 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22282 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22283 table if necessary. For convenience, return TYPE.
22285 The DIEs reading must have careful ordering to:
22286 * Not cause infite loops trying to read in DIEs as a prerequisite for
22287 reading current DIE.
22288 * Not trying to dereference contents of still incompletely read in types
22289 while reading in other DIEs.
22290 * Enable referencing still incompletely read in types just by a pointer to
22291 the type without accessing its fields.
22293 Therefore caller should follow these rules:
22294 * Try to fetch any prerequisite types we may need to build this DIE type
22295 before building the type and calling set_die_type.
22296 * After building type call set_die_type for current DIE as soon as
22297 possible before fetching more types to complete the current type.
22298 * Make the type as complete as possible before fetching more types. */
22300 static struct type
*
22301 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22303 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22304 struct objfile
*objfile
= cu
->objfile
;
22305 struct attribute
*attr
;
22306 struct dynamic_prop prop
;
22308 /* For Ada types, make sure that the gnat-specific data is always
22309 initialized (if not already set). There are a few types where
22310 we should not be doing so, because the type-specific area is
22311 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22312 where the type-specific area is used to store the floatformat).
22313 But this is not a problem, because the gnat-specific information
22314 is actually not needed for these types. */
22315 if (need_gnat_info (cu
)
22316 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22317 && TYPE_CODE (type
) != TYPE_CODE_FLT
22318 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22319 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22320 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22321 && !HAVE_GNAT_AUX_INFO (type
))
22322 INIT_GNAT_SPECIFIC (type
);
22324 /* Read DW_AT_data_location and set in type. */
22325 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22326 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22327 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22329 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22331 dwarf2_per_objfile
->die_type_hash
=
22332 htab_create_alloc_ex (127,
22333 per_cu_offset_and_type_hash
,
22334 per_cu_offset_and_type_eq
,
22336 &objfile
->objfile_obstack
,
22337 hashtab_obstack_allocate
,
22338 dummy_obstack_deallocate
);
22341 ofs
.per_cu
= cu
->per_cu
;
22342 ofs
.offset
= die
->offset
;
22344 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22345 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22347 complaint (&symfile_complaints
,
22348 _("A problem internal to GDB: DIE 0x%x has type already set"),
22349 die
->offset
.sect_off
);
22350 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22355 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22356 or return NULL if the die does not have a saved type. */
22358 static struct type
*
22359 get_die_type_at_offset (sect_offset offset
,
22360 struct dwarf2_per_cu_data
*per_cu
)
22362 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22364 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22367 ofs
.per_cu
= per_cu
;
22368 ofs
.offset
= offset
;
22369 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22376 /* Look up the type for DIE in CU in die_type_hash,
22377 or return NULL if DIE does not have a saved type. */
22379 static struct type
*
22380 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22382 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22385 /* Add a dependence relationship from CU to REF_PER_CU. */
22388 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22389 struct dwarf2_per_cu_data
*ref_per_cu
)
22393 if (cu
->dependencies
== NULL
)
22395 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22396 NULL
, &cu
->comp_unit_obstack
,
22397 hashtab_obstack_allocate
,
22398 dummy_obstack_deallocate
);
22400 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22402 *slot
= ref_per_cu
;
22405 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22406 Set the mark field in every compilation unit in the
22407 cache that we must keep because we are keeping CU. */
22410 dwarf2_mark_helper (void **slot
, void *data
)
22412 struct dwarf2_per_cu_data
*per_cu
;
22414 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22416 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22417 reading of the chain. As such dependencies remain valid it is not much
22418 useful to track and undo them during QUIT cleanups. */
22419 if (per_cu
->cu
== NULL
)
22422 if (per_cu
->cu
->mark
)
22424 per_cu
->cu
->mark
= 1;
22426 if (per_cu
->cu
->dependencies
!= NULL
)
22427 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22432 /* Set the mark field in CU and in every other compilation unit in the
22433 cache that we must keep because we are keeping CU. */
22436 dwarf2_mark (struct dwarf2_cu
*cu
)
22441 if (cu
->dependencies
!= NULL
)
22442 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22446 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22450 per_cu
->cu
->mark
= 0;
22451 per_cu
= per_cu
->cu
->read_in_chain
;
22455 /* Trivial hash function for partial_die_info: the hash value of a DIE
22456 is its offset in .debug_info for this objfile. */
22459 partial_die_hash (const void *item
)
22461 const struct partial_die_info
*part_die
= item
;
22463 return part_die
->offset
.sect_off
;
22466 /* Trivial comparison function for partial_die_info structures: two DIEs
22467 are equal if they have the same offset. */
22470 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22472 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22473 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22475 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22478 static struct cmd_list_element
*set_dwarf_cmdlist
;
22479 static struct cmd_list_element
*show_dwarf_cmdlist
;
22482 set_dwarf_cmd (char *args
, int from_tty
)
22484 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22489 show_dwarf_cmd (char *args
, int from_tty
)
22491 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22494 /* Free data associated with OBJFILE, if necessary. */
22497 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22499 struct dwarf2_per_objfile
*data
= d
;
22502 /* Make sure we don't accidentally use dwarf2_per_objfile while
22504 dwarf2_per_objfile
= NULL
;
22506 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22507 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22509 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22510 VEC_free (dwarf2_per_cu_ptr
,
22511 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22512 xfree (data
->all_type_units
);
22514 VEC_free (dwarf2_section_info_def
, data
->types
);
22516 if (data
->dwo_files
)
22517 free_dwo_files (data
->dwo_files
, objfile
);
22518 if (data
->dwp_file
)
22519 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22521 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22522 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22526 /* The "save gdb-index" command. */
22528 /* The contents of the hash table we create when building the string
22530 struct strtab_entry
22532 offset_type offset
;
22536 /* Hash function for a strtab_entry.
22538 Function is used only during write_hash_table so no index format backward
22539 compatibility is needed. */
22542 hash_strtab_entry (const void *e
)
22544 const struct strtab_entry
*entry
= e
;
22545 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22548 /* Equality function for a strtab_entry. */
22551 eq_strtab_entry (const void *a
, const void *b
)
22553 const struct strtab_entry
*ea
= a
;
22554 const struct strtab_entry
*eb
= b
;
22555 return !strcmp (ea
->str
, eb
->str
);
22558 /* Create a strtab_entry hash table. */
22561 create_strtab (void)
22563 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22564 xfree
, xcalloc
, xfree
);
22567 /* Add a string to the constant pool. Return the string's offset in
22571 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22574 struct strtab_entry entry
;
22575 struct strtab_entry
*result
;
22578 slot
= htab_find_slot (table
, &entry
, INSERT
);
22583 result
= XNEW (struct strtab_entry
);
22584 result
->offset
= obstack_object_size (cpool
);
22586 obstack_grow_str0 (cpool
, str
);
22589 return result
->offset
;
22592 /* An entry in the symbol table. */
22593 struct symtab_index_entry
22595 /* The name of the symbol. */
22597 /* The offset of the name in the constant pool. */
22598 offset_type index_offset
;
22599 /* A sorted vector of the indices of all the CUs that hold an object
22601 VEC (offset_type
) *cu_indices
;
22604 /* The symbol table. This is a power-of-2-sized hash table. */
22605 struct mapped_symtab
22607 offset_type n_elements
;
22609 struct symtab_index_entry
**data
;
22612 /* Hash function for a symtab_index_entry. */
22615 hash_symtab_entry (const void *e
)
22617 const struct symtab_index_entry
*entry
= e
;
22618 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22619 sizeof (offset_type
) * VEC_length (offset_type
,
22620 entry
->cu_indices
),
22624 /* Equality function for a symtab_index_entry. */
22627 eq_symtab_entry (const void *a
, const void *b
)
22629 const struct symtab_index_entry
*ea
= a
;
22630 const struct symtab_index_entry
*eb
= b
;
22631 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22632 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22634 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22635 VEC_address (offset_type
, eb
->cu_indices
),
22636 sizeof (offset_type
) * len
);
22639 /* Destroy a symtab_index_entry. */
22642 delete_symtab_entry (void *p
)
22644 struct symtab_index_entry
*entry
= p
;
22645 VEC_free (offset_type
, entry
->cu_indices
);
22649 /* Create a hash table holding symtab_index_entry objects. */
22652 create_symbol_hash_table (void)
22654 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22655 delete_symtab_entry
, xcalloc
, xfree
);
22658 /* Create a new mapped symtab object. */
22660 static struct mapped_symtab
*
22661 create_mapped_symtab (void)
22663 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22664 symtab
->n_elements
= 0;
22665 symtab
->size
= 1024;
22666 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22670 /* Destroy a mapped_symtab. */
22673 cleanup_mapped_symtab (void *p
)
22675 struct mapped_symtab
*symtab
= p
;
22676 /* The contents of the array are freed when the other hash table is
22678 xfree (symtab
->data
);
22682 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22685 Function is used only during write_hash_table so no index format backward
22686 compatibility is needed. */
22688 static struct symtab_index_entry
**
22689 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22691 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22693 index
= hash
& (symtab
->size
- 1);
22694 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22698 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22699 return &symtab
->data
[index
];
22700 index
= (index
+ step
) & (symtab
->size
- 1);
22704 /* Expand SYMTAB's hash table. */
22707 hash_expand (struct mapped_symtab
*symtab
)
22709 offset_type old_size
= symtab
->size
;
22711 struct symtab_index_entry
**old_entries
= symtab
->data
;
22714 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22716 for (i
= 0; i
< old_size
; ++i
)
22718 if (old_entries
[i
])
22720 struct symtab_index_entry
**slot
= find_slot (symtab
,
22721 old_entries
[i
]->name
);
22722 *slot
= old_entries
[i
];
22726 xfree (old_entries
);
22729 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22730 CU_INDEX is the index of the CU in which the symbol appears.
22731 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22734 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22735 int is_static
, gdb_index_symbol_kind kind
,
22736 offset_type cu_index
)
22738 struct symtab_index_entry
**slot
;
22739 offset_type cu_index_and_attrs
;
22741 ++symtab
->n_elements
;
22742 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22743 hash_expand (symtab
);
22745 slot
= find_slot (symtab
, name
);
22748 *slot
= XNEW (struct symtab_index_entry
);
22749 (*slot
)->name
= name
;
22750 /* index_offset is set later. */
22751 (*slot
)->cu_indices
= NULL
;
22754 cu_index_and_attrs
= 0;
22755 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22756 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22757 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22759 /* We don't want to record an index value twice as we want to avoid the
22761 We process all global symbols and then all static symbols
22762 (which would allow us to avoid the duplication by only having to check
22763 the last entry pushed), but a symbol could have multiple kinds in one CU.
22764 To keep things simple we don't worry about the duplication here and
22765 sort and uniqufy the list after we've processed all symbols. */
22766 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22769 /* qsort helper routine for uniquify_cu_indices. */
22772 offset_type_compare (const void *ap
, const void *bp
)
22774 offset_type a
= *(offset_type
*) ap
;
22775 offset_type b
= *(offset_type
*) bp
;
22777 return (a
> b
) - (b
> a
);
22780 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22783 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22787 for (i
= 0; i
< symtab
->size
; ++i
)
22789 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22792 && entry
->cu_indices
!= NULL
)
22794 unsigned int next_to_insert
, next_to_check
;
22795 offset_type last_value
;
22797 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22798 VEC_length (offset_type
, entry
->cu_indices
),
22799 sizeof (offset_type
), offset_type_compare
);
22801 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22802 next_to_insert
= 1;
22803 for (next_to_check
= 1;
22804 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22807 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22810 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22812 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22817 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22822 /* Add a vector of indices to the constant pool. */
22825 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22826 struct symtab_index_entry
*entry
)
22830 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22833 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22834 offset_type val
= MAYBE_SWAP (len
);
22839 entry
->index_offset
= obstack_object_size (cpool
);
22841 obstack_grow (cpool
, &val
, sizeof (val
));
22843 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22846 val
= MAYBE_SWAP (iter
);
22847 obstack_grow (cpool
, &val
, sizeof (val
));
22852 struct symtab_index_entry
*old_entry
= *slot
;
22853 entry
->index_offset
= old_entry
->index_offset
;
22856 return entry
->index_offset
;
22859 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22860 constant pool entries going into the obstack CPOOL. */
22863 write_hash_table (struct mapped_symtab
*symtab
,
22864 struct obstack
*output
, struct obstack
*cpool
)
22867 htab_t symbol_hash_table
;
22870 symbol_hash_table
= create_symbol_hash_table ();
22871 str_table
= create_strtab ();
22873 /* We add all the index vectors to the constant pool first, to
22874 ensure alignment is ok. */
22875 for (i
= 0; i
< symtab
->size
; ++i
)
22877 if (symtab
->data
[i
])
22878 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22881 /* Now write out the hash table. */
22882 for (i
= 0; i
< symtab
->size
; ++i
)
22884 offset_type str_off
, vec_off
;
22886 if (symtab
->data
[i
])
22888 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22889 vec_off
= symtab
->data
[i
]->index_offset
;
22893 /* While 0 is a valid constant pool index, it is not valid
22894 to have 0 for both offsets. */
22899 str_off
= MAYBE_SWAP (str_off
);
22900 vec_off
= MAYBE_SWAP (vec_off
);
22902 obstack_grow (output
, &str_off
, sizeof (str_off
));
22903 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22906 htab_delete (str_table
);
22907 htab_delete (symbol_hash_table
);
22910 /* Struct to map psymtab to CU index in the index file. */
22911 struct psymtab_cu_index_map
22913 struct partial_symtab
*psymtab
;
22914 unsigned int cu_index
;
22918 hash_psymtab_cu_index (const void *item
)
22920 const struct psymtab_cu_index_map
*map
= item
;
22922 return htab_hash_pointer (map
->psymtab
);
22926 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22928 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22929 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22931 return lhs
->psymtab
== rhs
->psymtab
;
22934 /* Helper struct for building the address table. */
22935 struct addrmap_index_data
22937 struct objfile
*objfile
;
22938 struct obstack
*addr_obstack
;
22939 htab_t cu_index_htab
;
22941 /* Non-zero if the previous_* fields are valid.
22942 We can't write an entry until we see the next entry (since it is only then
22943 that we know the end of the entry). */
22944 int previous_valid
;
22945 /* Index of the CU in the table of all CUs in the index file. */
22946 unsigned int previous_cu_index
;
22947 /* Start address of the CU. */
22948 CORE_ADDR previous_cu_start
;
22951 /* Write an address entry to OBSTACK. */
22954 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22955 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22957 offset_type cu_index_to_write
;
22959 CORE_ADDR baseaddr
;
22961 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22963 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22964 obstack_grow (obstack
, addr
, 8);
22965 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22966 obstack_grow (obstack
, addr
, 8);
22967 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22968 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22971 /* Worker function for traversing an addrmap to build the address table. */
22974 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22976 struct addrmap_index_data
*data
= datap
;
22977 struct partial_symtab
*pst
= obj
;
22979 if (data
->previous_valid
)
22980 add_address_entry (data
->objfile
, data
->addr_obstack
,
22981 data
->previous_cu_start
, start_addr
,
22982 data
->previous_cu_index
);
22984 data
->previous_cu_start
= start_addr
;
22987 struct psymtab_cu_index_map find_map
, *map
;
22988 find_map
.psymtab
= pst
;
22989 map
= htab_find (data
->cu_index_htab
, &find_map
);
22990 gdb_assert (map
!= NULL
);
22991 data
->previous_cu_index
= map
->cu_index
;
22992 data
->previous_valid
= 1;
22995 data
->previous_valid
= 0;
23000 /* Write OBJFILE's address map to OBSTACK.
23001 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23002 in the index file. */
23005 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23006 htab_t cu_index_htab
)
23008 struct addrmap_index_data addrmap_index_data
;
23010 /* When writing the address table, we have to cope with the fact that
23011 the addrmap iterator only provides the start of a region; we have to
23012 wait until the next invocation to get the start of the next region. */
23014 addrmap_index_data
.objfile
= objfile
;
23015 addrmap_index_data
.addr_obstack
= obstack
;
23016 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23017 addrmap_index_data
.previous_valid
= 0;
23019 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23020 &addrmap_index_data
);
23022 /* It's highly unlikely the last entry (end address = 0xff...ff)
23023 is valid, but we should still handle it.
23024 The end address is recorded as the start of the next region, but that
23025 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23027 if (addrmap_index_data
.previous_valid
)
23028 add_address_entry (objfile
, obstack
,
23029 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23030 addrmap_index_data
.previous_cu_index
);
23033 /* Return the symbol kind of PSYM. */
23035 static gdb_index_symbol_kind
23036 symbol_kind (struct partial_symbol
*psym
)
23038 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23039 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23047 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23049 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23051 case LOC_CONST_BYTES
:
23052 case LOC_OPTIMIZED_OUT
:
23054 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23056 /* Note: It's currently impossible to recognize psyms as enum values
23057 short of reading the type info. For now punt. */
23058 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23060 /* There are other LOC_FOO values that one might want to classify
23061 as variables, but dwarf2read.c doesn't currently use them. */
23062 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23064 case STRUCT_DOMAIN
:
23065 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23067 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23071 /* Add a list of partial symbols to SYMTAB. */
23074 write_psymbols (struct mapped_symtab
*symtab
,
23076 struct partial_symbol
**psymp
,
23078 offset_type cu_index
,
23081 for (; count
-- > 0; ++psymp
)
23083 struct partial_symbol
*psym
= *psymp
;
23086 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23087 error (_("Ada is not currently supported by the index"));
23089 /* Only add a given psymbol once. */
23090 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23093 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23096 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23097 is_static
, kind
, cu_index
);
23102 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23103 exception if there is an error. */
23106 write_obstack (FILE *file
, struct obstack
*obstack
)
23108 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23110 != obstack_object_size (obstack
))
23111 error (_("couldn't data write to file"));
23114 /* Unlink a file if the argument is not NULL. */
23117 unlink_if_set (void *p
)
23119 char **filename
= p
;
23121 unlink (*filename
);
23124 /* A helper struct used when iterating over debug_types. */
23125 struct signatured_type_index_data
23127 struct objfile
*objfile
;
23128 struct mapped_symtab
*symtab
;
23129 struct obstack
*types_list
;
23134 /* A helper function that writes a single signatured_type to an
23138 write_one_signatured_type (void **slot
, void *d
)
23140 struct signatured_type_index_data
*info
= d
;
23141 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23142 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23145 write_psymbols (info
->symtab
,
23147 info
->objfile
->global_psymbols
.list
23148 + psymtab
->globals_offset
,
23149 psymtab
->n_global_syms
, info
->cu_index
,
23151 write_psymbols (info
->symtab
,
23153 info
->objfile
->static_psymbols
.list
23154 + psymtab
->statics_offset
,
23155 psymtab
->n_static_syms
, info
->cu_index
,
23158 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23159 entry
->per_cu
.offset
.sect_off
);
23160 obstack_grow (info
->types_list
, val
, 8);
23161 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23162 entry
->type_offset_in_tu
.cu_off
);
23163 obstack_grow (info
->types_list
, val
, 8);
23164 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23165 obstack_grow (info
->types_list
, val
, 8);
23172 /* Recurse into all "included" dependencies and write their symbols as
23173 if they appeared in this psymtab. */
23176 recursively_write_psymbols (struct objfile
*objfile
,
23177 struct partial_symtab
*psymtab
,
23178 struct mapped_symtab
*symtab
,
23180 offset_type cu_index
)
23184 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23185 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23186 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23187 symtab
, psyms_seen
, cu_index
);
23189 write_psymbols (symtab
,
23191 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23192 psymtab
->n_global_syms
, cu_index
,
23194 write_psymbols (symtab
,
23196 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23197 psymtab
->n_static_syms
, cu_index
,
23201 /* Create an index file for OBJFILE in the directory DIR. */
23204 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23206 struct cleanup
*cleanup
;
23207 char *filename
, *cleanup_filename
;
23208 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23209 struct obstack cu_list
, types_cu_list
;
23212 struct mapped_symtab
*symtab
;
23213 offset_type val
, size_of_contents
, total_len
;
23216 htab_t cu_index_htab
;
23217 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23219 if (dwarf2_per_objfile
->using_index
)
23220 error (_("Cannot use an index to create the index"));
23222 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23223 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23225 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23228 if (stat (objfile_name (objfile
), &st
) < 0)
23229 perror_with_name (objfile_name (objfile
));
23231 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23232 INDEX_SUFFIX
, (char *) NULL
);
23233 cleanup
= make_cleanup (xfree
, filename
);
23235 out_file
= gdb_fopen_cloexec (filename
, "wb");
23237 error (_("Can't open `%s' for writing"), filename
);
23239 cleanup_filename
= filename
;
23240 make_cleanup (unlink_if_set
, &cleanup_filename
);
23242 symtab
= create_mapped_symtab ();
23243 make_cleanup (cleanup_mapped_symtab
, symtab
);
23245 obstack_init (&addr_obstack
);
23246 make_cleanup_obstack_free (&addr_obstack
);
23248 obstack_init (&cu_list
);
23249 make_cleanup_obstack_free (&cu_list
);
23251 obstack_init (&types_cu_list
);
23252 make_cleanup_obstack_free (&types_cu_list
);
23254 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23255 NULL
, xcalloc
, xfree
);
23256 make_cleanup_htab_delete (psyms_seen
);
23258 /* While we're scanning CU's create a table that maps a psymtab pointer
23259 (which is what addrmap records) to its index (which is what is recorded
23260 in the index file). This will later be needed to write the address
23262 cu_index_htab
= htab_create_alloc (100,
23263 hash_psymtab_cu_index
,
23264 eq_psymtab_cu_index
,
23265 NULL
, xcalloc
, xfree
);
23266 make_cleanup_htab_delete (cu_index_htab
);
23267 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
23268 xmalloc (sizeof (struct psymtab_cu_index_map
)
23269 * dwarf2_per_objfile
->n_comp_units
);
23270 make_cleanup (xfree
, psymtab_cu_index_map
);
23272 /* The CU list is already sorted, so we don't need to do additional
23273 work here. Also, the debug_types entries do not appear in
23274 all_comp_units, but only in their own hash table. */
23275 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23277 struct dwarf2_per_cu_data
*per_cu
23278 = dwarf2_per_objfile
->all_comp_units
[i
];
23279 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23281 struct psymtab_cu_index_map
*map
;
23284 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23285 It may be referenced from a local scope but in such case it does not
23286 need to be present in .gdb_index. */
23287 if (psymtab
== NULL
)
23290 if (psymtab
->user
== NULL
)
23291 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23293 map
= &psymtab_cu_index_map
[i
];
23294 map
->psymtab
= psymtab
;
23296 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23297 gdb_assert (slot
!= NULL
);
23298 gdb_assert (*slot
== NULL
);
23301 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23302 per_cu
->offset
.sect_off
);
23303 obstack_grow (&cu_list
, val
, 8);
23304 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23305 obstack_grow (&cu_list
, val
, 8);
23308 /* Dump the address map. */
23309 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23311 /* Write out the .debug_type entries, if any. */
23312 if (dwarf2_per_objfile
->signatured_types
)
23314 struct signatured_type_index_data sig_data
;
23316 sig_data
.objfile
= objfile
;
23317 sig_data
.symtab
= symtab
;
23318 sig_data
.types_list
= &types_cu_list
;
23319 sig_data
.psyms_seen
= psyms_seen
;
23320 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23321 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23322 write_one_signatured_type
, &sig_data
);
23325 /* Now that we've processed all symbols we can shrink their cu_indices
23327 uniquify_cu_indices (symtab
);
23329 obstack_init (&constant_pool
);
23330 make_cleanup_obstack_free (&constant_pool
);
23331 obstack_init (&symtab_obstack
);
23332 make_cleanup_obstack_free (&symtab_obstack
);
23333 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23335 obstack_init (&contents
);
23336 make_cleanup_obstack_free (&contents
);
23337 size_of_contents
= 6 * sizeof (offset_type
);
23338 total_len
= size_of_contents
;
23340 /* The version number. */
23341 val
= MAYBE_SWAP (8);
23342 obstack_grow (&contents
, &val
, sizeof (val
));
23344 /* The offset of the CU list from the start of the file. */
23345 val
= MAYBE_SWAP (total_len
);
23346 obstack_grow (&contents
, &val
, sizeof (val
));
23347 total_len
+= obstack_object_size (&cu_list
);
23349 /* The offset of the types CU list from the start of the file. */
23350 val
= MAYBE_SWAP (total_len
);
23351 obstack_grow (&contents
, &val
, sizeof (val
));
23352 total_len
+= obstack_object_size (&types_cu_list
);
23354 /* The offset of the address table from the start of the file. */
23355 val
= MAYBE_SWAP (total_len
);
23356 obstack_grow (&contents
, &val
, sizeof (val
));
23357 total_len
+= obstack_object_size (&addr_obstack
);
23359 /* The offset of the symbol table from the start of the file. */
23360 val
= MAYBE_SWAP (total_len
);
23361 obstack_grow (&contents
, &val
, sizeof (val
));
23362 total_len
+= obstack_object_size (&symtab_obstack
);
23364 /* The offset of the constant pool from the start of the file. */
23365 val
= MAYBE_SWAP (total_len
);
23366 obstack_grow (&contents
, &val
, sizeof (val
));
23367 total_len
+= obstack_object_size (&constant_pool
);
23369 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23371 write_obstack (out_file
, &contents
);
23372 write_obstack (out_file
, &cu_list
);
23373 write_obstack (out_file
, &types_cu_list
);
23374 write_obstack (out_file
, &addr_obstack
);
23375 write_obstack (out_file
, &symtab_obstack
);
23376 write_obstack (out_file
, &constant_pool
);
23380 /* We want to keep the file, so we set cleanup_filename to NULL
23381 here. See unlink_if_set. */
23382 cleanup_filename
= NULL
;
23384 do_cleanups (cleanup
);
23387 /* Implementation of the `save gdb-index' command.
23389 Note that the file format used by this command is documented in the
23390 GDB manual. Any changes here must be documented there. */
23393 save_gdb_index_command (char *arg
, int from_tty
)
23395 struct objfile
*objfile
;
23398 error (_("usage: save gdb-index DIRECTORY"));
23400 ALL_OBJFILES (objfile
)
23404 /* If the objfile does not correspond to an actual file, skip it. */
23405 if (stat (objfile_name (objfile
), &st
) < 0)
23408 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23409 if (dwarf2_per_objfile
)
23414 write_psymtabs_to_index (objfile
, arg
);
23416 CATCH (except
, RETURN_MASK_ERROR
)
23418 exception_fprintf (gdb_stderr
, except
,
23419 _("Error while writing index for `%s': "),
23420 objfile_name (objfile
));
23429 int dwarf_always_disassemble
;
23432 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23433 struct cmd_list_element
*c
, const char *value
)
23435 fprintf_filtered (file
,
23436 _("Whether to always disassemble "
23437 "DWARF expressions is %s.\n"),
23442 show_check_physname (struct ui_file
*file
, int from_tty
,
23443 struct cmd_list_element
*c
, const char *value
)
23445 fprintf_filtered (file
,
23446 _("Whether to check \"physname\" is %s.\n"),
23450 void _initialize_dwarf2_read (void);
23453 _initialize_dwarf2_read (void)
23455 struct cmd_list_element
*c
;
23457 dwarf2_objfile_data_key
23458 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23460 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23461 Set DWARF specific variables.\n\
23462 Configure DWARF variables such as the cache size"),
23463 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23464 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23466 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23467 Show DWARF specific variables\n\
23468 Show DWARF variables such as the cache size"),
23469 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23470 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23472 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23473 &dwarf_max_cache_age
, _("\
23474 Set the upper bound on the age of cached DWARF compilation units."), _("\
23475 Show the upper bound on the age of cached DWARF compilation units."), _("\
23476 A higher limit means that cached compilation units will be stored\n\
23477 in memory longer, and more total memory will be used. Zero disables\n\
23478 caching, which can slow down startup."),
23480 show_dwarf_max_cache_age
,
23481 &set_dwarf_cmdlist
,
23482 &show_dwarf_cmdlist
);
23484 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23485 &dwarf_always_disassemble
, _("\
23486 Set whether `info address' always disassembles DWARF expressions."), _("\
23487 Show whether `info address' always disassembles DWARF expressions."), _("\
23488 When enabled, DWARF expressions are always printed in an assembly-like\n\
23489 syntax. When disabled, expressions will be printed in a more\n\
23490 conversational style, when possible."),
23492 show_dwarf_always_disassemble
,
23493 &set_dwarf_cmdlist
,
23494 &show_dwarf_cmdlist
);
23496 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23497 Set debugging of the DWARF reader."), _("\
23498 Show debugging of the DWARF reader."), _("\
23499 When enabled (non-zero), debugging messages are printed during DWARF\n\
23500 reading and symtab expansion. A value of 1 (one) provides basic\n\
23501 information. A value greater than 1 provides more verbose information."),
23504 &setdebuglist
, &showdebuglist
);
23506 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23507 Set debugging of the DWARF DIE reader."), _("\
23508 Show debugging of the DWARF DIE reader."), _("\
23509 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23510 The value is the maximum depth to print."),
23513 &setdebuglist
, &showdebuglist
);
23515 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23516 Set debugging of the dwarf line reader."), _("\
23517 Show debugging of the dwarf line reader."), _("\
23518 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23519 A value of 1 (one) provides basic information.\n\
23520 A value greater than 1 provides more verbose information."),
23523 &setdebuglist
, &showdebuglist
);
23525 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23526 Set cross-checking of \"physname\" code against demangler."), _("\
23527 Show cross-checking of \"physname\" code against demangler."), _("\
23528 When enabled, GDB's internal \"physname\" code is checked against\n\
23530 NULL
, show_check_physname
,
23531 &setdebuglist
, &showdebuglist
);
23533 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23534 no_class
, &use_deprecated_index_sections
, _("\
23535 Set whether to use deprecated gdb_index sections."), _("\
23536 Show whether to use deprecated gdb_index sections."), _("\
23537 When enabled, deprecated .gdb_index sections are used anyway.\n\
23538 Normally they are ignored either because of a missing feature or\n\
23539 performance issue.\n\
23540 Warning: This option must be enabled before gdb reads the file."),
23543 &setlist
, &showlist
);
23545 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23547 Save a gdb-index file.\n\
23548 Usage: save gdb-index DIRECTORY"),
23550 set_cmd_completer (c
, filename_completer
);
23552 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23553 &dwarf2_locexpr_funcs
);
23554 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23555 &dwarf2_loclist_funcs
);
23557 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23558 &dwarf2_block_frame_base_locexpr_funcs
);
23559 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23560 &dwarf2_block_frame_base_loclist_funcs
);