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.section 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 const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1528 struct dwarf2_cu
*cu
);
1530 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1531 struct dwarf2_cu
*cu
);
1533 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1535 static struct die_info
*die_specification (struct die_info
*die
,
1536 struct dwarf2_cu
**);
1538 static void free_line_header (struct line_header
*lh
);
1540 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1541 struct dwarf2_cu
*cu
);
1543 static void dwarf_decode_lines (struct line_header
*, const char *,
1544 struct dwarf2_cu
*, struct partial_symtab
*,
1545 CORE_ADDR
, int decode_mapping
);
1547 static void dwarf2_start_subfile (const char *, const char *);
1549 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1550 const char *, const char *,
1553 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*);
1556 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1557 struct dwarf2_cu
*, struct symbol
*);
1559 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1560 struct dwarf2_cu
*);
1562 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1565 struct obstack
*obstack
,
1566 struct dwarf2_cu
*cu
, LONGEST
*value
,
1567 const gdb_byte
**bytes
,
1568 struct dwarf2_locexpr_baton
**baton
);
1570 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1572 static int need_gnat_info (struct dwarf2_cu
*);
1574 static struct type
*die_descriptive_type (struct die_info
*,
1575 struct dwarf2_cu
*);
1577 static void set_descriptive_type (struct type
*, struct die_info
*,
1578 struct dwarf2_cu
*);
1580 static struct type
*die_containing_type (struct die_info
*,
1581 struct dwarf2_cu
*);
1583 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1584 struct dwarf2_cu
*);
1586 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1588 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1590 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1592 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1593 const char *suffix
, int physname
,
1594 struct dwarf2_cu
*cu
);
1596 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1598 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1600 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1602 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1604 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1606 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1607 struct dwarf2_cu
*, struct partial_symtab
*);
1609 static int dwarf2_get_pc_bounds (struct die_info
*,
1610 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1611 struct partial_symtab
*);
1613 static void get_scope_pc_bounds (struct die_info
*,
1614 CORE_ADDR
*, CORE_ADDR
*,
1615 struct dwarf2_cu
*);
1617 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1618 CORE_ADDR
, struct dwarf2_cu
*);
1620 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1621 struct dwarf2_cu
*);
1623 static void dwarf2_attach_fields_to_type (struct field_info
*,
1624 struct type
*, struct dwarf2_cu
*);
1626 static void dwarf2_add_member_fn (struct field_info
*,
1627 struct die_info
*, struct type
*,
1628 struct dwarf2_cu
*);
1630 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1632 struct dwarf2_cu
*);
1634 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1636 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1638 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1640 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1642 static struct using_direct
**using_directives (enum language
);
1644 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1646 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1648 static struct type
*read_module_type (struct die_info
*die
,
1649 struct dwarf2_cu
*cu
);
1651 static const char *namespace_name (struct die_info
*die
,
1652 int *is_anonymous
, struct dwarf2_cu
*);
1654 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1656 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1658 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1659 struct dwarf2_cu
*);
1661 static struct die_info
*read_die_and_siblings_1
1662 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1665 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1666 const gdb_byte
*info_ptr
,
1667 const gdb_byte
**new_info_ptr
,
1668 struct die_info
*parent
);
1670 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1671 struct die_info
**, const gdb_byte
*,
1674 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1675 struct die_info
**, const gdb_byte
*,
1678 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1680 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1683 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1685 static const char *dwarf2_full_name (const char *name
,
1686 struct die_info
*die
,
1687 struct dwarf2_cu
*cu
);
1689 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1690 struct dwarf2_cu
*cu
);
1692 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1693 struct dwarf2_cu
**);
1695 static const char *dwarf_tag_name (unsigned int);
1697 static const char *dwarf_attr_name (unsigned int);
1699 static const char *dwarf_form_name (unsigned int);
1701 static char *dwarf_bool_name (unsigned int);
1703 static const char *dwarf_type_encoding_name (unsigned int);
1705 static struct die_info
*sibling_die (struct die_info
*);
1707 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1709 static void dump_die_for_error (struct die_info
*);
1711 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1714 /*static*/ void dump_die (struct die_info
*, int max_level
);
1716 static void store_in_ref_table (struct die_info
*,
1717 struct dwarf2_cu
*);
1719 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1721 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1723 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1724 const struct attribute
*,
1725 struct dwarf2_cu
**);
1727 static struct die_info
*follow_die_ref (struct die_info
*,
1728 const struct attribute
*,
1729 struct dwarf2_cu
**);
1731 static struct die_info
*follow_die_sig (struct die_info
*,
1732 const struct attribute
*,
1733 struct dwarf2_cu
**);
1735 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1736 struct dwarf2_cu
*);
1738 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1739 const struct attribute
*,
1740 struct dwarf2_cu
*);
1742 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1744 static void read_signatured_type (struct signatured_type
*);
1746 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1747 struct die_info
*die
, struct dwarf2_cu
*cu
,
1748 struct dynamic_prop
*prop
);
1750 /* memory allocation interface */
1752 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1754 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1756 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1758 static int attr_form_is_block (const struct attribute
*);
1760 static int attr_form_is_section_offset (const struct attribute
*);
1762 static int attr_form_is_constant (const struct attribute
*);
1764 static int attr_form_is_ref (const struct attribute
*);
1766 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1767 struct dwarf2_loclist_baton
*baton
,
1768 const struct attribute
*attr
);
1770 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1772 struct dwarf2_cu
*cu
,
1775 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1776 const gdb_byte
*info_ptr
,
1777 struct abbrev_info
*abbrev
);
1779 static void free_stack_comp_unit (void *);
1781 static hashval_t
partial_die_hash (const void *item
);
1783 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1785 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1786 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1788 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1789 struct dwarf2_per_cu_data
*per_cu
);
1791 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1792 struct die_info
*comp_unit_die
,
1793 enum language pretend_language
);
1795 static void free_heap_comp_unit (void *);
1797 static void free_cached_comp_units (void *);
1799 static void age_cached_comp_units (void);
1801 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1803 static struct type
*set_die_type (struct die_info
*, struct type
*,
1804 struct dwarf2_cu
*);
1806 static void create_all_comp_units (struct objfile
*);
1808 static int create_all_type_units (struct objfile
*);
1810 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1813 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1816 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1819 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1820 struct dwarf2_per_cu_data
*);
1822 static void dwarf2_mark (struct dwarf2_cu
*);
1824 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1826 static struct type
*get_die_type_at_offset (sect_offset
,
1827 struct dwarf2_per_cu_data
*);
1829 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1831 static void dwarf2_release_queue (void *dummy
);
1833 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1834 enum language pretend_language
);
1836 static void process_queue (void);
1838 static void find_file_and_directory (struct die_info
*die
,
1839 struct dwarf2_cu
*cu
,
1840 const char **name
, const char **comp_dir
);
1842 static char *file_full_name (int file
, struct line_header
*lh
,
1843 const char *comp_dir
);
1845 static const gdb_byte
*read_and_check_comp_unit_head
1846 (struct comp_unit_head
*header
,
1847 struct dwarf2_section_info
*section
,
1848 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1849 int is_debug_types_section
);
1851 static void init_cutu_and_read_dies
1852 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1853 int use_existing_cu
, int keep
,
1854 die_reader_func_ftype
*die_reader_func
, void *data
);
1856 static void init_cutu_and_read_dies_simple
1857 (struct dwarf2_per_cu_data
*this_cu
,
1858 die_reader_func_ftype
*die_reader_func
, void *data
);
1860 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1862 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1864 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1865 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1866 ULONGEST signature
, int is_debug_types
);
1868 static struct dwp_file
*get_dwp_file (void);
1870 static struct dwo_unit
*lookup_dwo_comp_unit
1871 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1873 static struct dwo_unit
*lookup_dwo_type_unit
1874 (struct signatured_type
*, const char *, const char *);
1876 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1878 static void free_dwo_file_cleanup (void *);
1880 static void process_cu_includes (void);
1882 static void check_producer (struct dwarf2_cu
*cu
);
1884 static void free_line_header_voidp (void *arg
);
1886 /* Various complaints about symbol reading that don't abort the process. */
1889 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1891 complaint (&symfile_complaints
,
1892 _("statement list doesn't fit in .debug_line section"));
1896 dwarf2_debug_line_missing_file_complaint (void)
1898 complaint (&symfile_complaints
,
1899 _(".debug_line section has line data without a file"));
1903 dwarf2_debug_line_missing_end_sequence_complaint (void)
1905 complaint (&symfile_complaints
,
1906 _(".debug_line section has line "
1907 "program sequence without an end"));
1911 dwarf2_complex_location_expr_complaint (void)
1913 complaint (&symfile_complaints
, _("location expression too complex"));
1917 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1920 complaint (&symfile_complaints
,
1921 _("const value length mismatch for '%s', got %d, expected %d"),
1926 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1928 complaint (&symfile_complaints
,
1929 _("debug info runs off end of %s section"
1931 get_section_name (section
),
1932 get_section_file_name (section
));
1936 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1938 complaint (&symfile_complaints
,
1939 _("macro debug info contains a "
1940 "malformed macro definition:\n`%s'"),
1945 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1947 complaint (&symfile_complaints
,
1948 _("invalid attribute class or form for '%s' in '%s'"),
1952 /* Hash function for line_header_hash. */
1955 line_header_hash (const struct line_header
*ofs
)
1957 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1960 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1963 line_header_hash_voidp (const void *item
)
1965 const struct line_header
*ofs
= (const struct line_header
*) item
;
1967 return line_header_hash (ofs
);
1970 /* Equality function for line_header_hash. */
1973 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1975 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1976 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1978 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1979 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1985 /* Convert VALUE between big- and little-endian. */
1987 byte_swap (offset_type value
)
1991 result
= (value
& 0xff) << 24;
1992 result
|= (value
& 0xff00) << 8;
1993 result
|= (value
& 0xff0000) >> 8;
1994 result
|= (value
& 0xff000000) >> 24;
1998 #define MAYBE_SWAP(V) byte_swap (V)
2001 #define MAYBE_SWAP(V) (V)
2002 #endif /* WORDS_BIGENDIAN */
2004 /* Read the given attribute value as an address, taking the attribute's
2005 form into account. */
2008 attr_value_as_address (struct attribute
*attr
)
2012 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2014 /* Aside from a few clearly defined exceptions, attributes that
2015 contain an address must always be in DW_FORM_addr form.
2016 Unfortunately, some compilers happen to be violating this
2017 requirement by encoding addresses using other forms, such
2018 as DW_FORM_data4 for example. For those broken compilers,
2019 we try to do our best, without any guarantee of success,
2020 to interpret the address correctly. It would also be nice
2021 to generate a complaint, but that would require us to maintain
2022 a list of legitimate cases where a non-address form is allowed,
2023 as well as update callers to pass in at least the CU's DWARF
2024 version. This is more overhead than what we're willing to
2025 expand for a pretty rare case. */
2026 addr
= DW_UNSND (attr
);
2029 addr
= DW_ADDR (attr
);
2034 /* The suffix for an index file. */
2035 #define INDEX_SUFFIX ".gdb-index"
2037 /* Try to locate the sections we need for DWARF 2 debugging
2038 information and return true if we have enough to do something.
2039 NAMES points to the dwarf2 section names, or is NULL if the standard
2040 ELF names are used. */
2043 dwarf2_has_info (struct objfile
*objfile
,
2044 const struct dwarf2_debug_sections
*names
)
2046 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2047 objfile_data (objfile
, dwarf2_objfile_data_key
));
2048 if (!dwarf2_per_objfile
)
2050 /* Initialize per-objfile state. */
2051 struct dwarf2_per_objfile
*data
2052 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2054 memset (data
, 0, sizeof (*data
));
2055 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2056 dwarf2_per_objfile
= data
;
2058 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2060 dwarf2_per_objfile
->objfile
= objfile
;
2062 return (!dwarf2_per_objfile
->info
.is_virtual
2063 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2064 && !dwarf2_per_objfile
->abbrev
.is_virtual
2065 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2068 /* Return the containing section of virtual section SECTION. */
2070 static struct dwarf2_section_info
*
2071 get_containing_section (const struct dwarf2_section_info
*section
)
2073 gdb_assert (section
->is_virtual
);
2074 return section
->s
.containing_section
;
2077 /* Return the bfd owner of SECTION. */
2080 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2082 if (section
->is_virtual
)
2084 section
= get_containing_section (section
);
2085 gdb_assert (!section
->is_virtual
);
2087 return section
->s
.section
->owner
;
2090 /* Return the bfd section of SECTION.
2091 Returns NULL if the section is not present. */
2094 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2096 if (section
->is_virtual
)
2098 section
= get_containing_section (section
);
2099 gdb_assert (!section
->is_virtual
);
2101 return section
->s
.section
;
2104 /* Return the name of SECTION. */
2107 get_section_name (const struct dwarf2_section_info
*section
)
2109 asection
*sectp
= get_section_bfd_section (section
);
2111 gdb_assert (sectp
!= NULL
);
2112 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2115 /* Return the name of the file SECTION is in. */
2118 get_section_file_name (const struct dwarf2_section_info
*section
)
2120 bfd
*abfd
= get_section_bfd_owner (section
);
2122 return bfd_get_filename (abfd
);
2125 /* Return the id of SECTION.
2126 Returns 0 if SECTION doesn't exist. */
2129 get_section_id (const struct dwarf2_section_info
*section
)
2131 asection
*sectp
= get_section_bfd_section (section
);
2138 /* Return the flags of SECTION.
2139 SECTION (or containing section if this is a virtual section) must exist. */
2142 get_section_flags (const struct dwarf2_section_info
*section
)
2144 asection
*sectp
= get_section_bfd_section (section
);
2146 gdb_assert (sectp
!= NULL
);
2147 return bfd_get_section_flags (sectp
->owner
, sectp
);
2150 /* When loading sections, we look either for uncompressed section or for
2151 compressed section names. */
2154 section_is_p (const char *section_name
,
2155 const struct dwarf2_section_names
*names
)
2157 if (names
->normal
!= NULL
2158 && strcmp (section_name
, names
->normal
) == 0)
2160 if (names
->compressed
!= NULL
2161 && strcmp (section_name
, names
->compressed
) == 0)
2166 /* This function is mapped across the sections and remembers the
2167 offset and size of each of the debugging sections we are interested
2171 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2173 const struct dwarf2_debug_sections
*names
;
2174 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2177 names
= &dwarf2_elf_names
;
2179 names
= (const struct dwarf2_debug_sections
*) vnames
;
2181 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2184 else if (section_is_p (sectp
->name
, &names
->info
))
2186 dwarf2_per_objfile
->info
.s
.section
= sectp
;
2187 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2189 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2191 dwarf2_per_objfile
->abbrev
.s
.section
= sectp
;
2192 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2194 else if (section_is_p (sectp
->name
, &names
->line
))
2196 dwarf2_per_objfile
->line
.s
.section
= sectp
;
2197 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2199 else if (section_is_p (sectp
->name
, &names
->loc
))
2201 dwarf2_per_objfile
->loc
.s
.section
= sectp
;
2202 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2204 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2206 dwarf2_per_objfile
->macinfo
.s
.section
= sectp
;
2207 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2209 else if (section_is_p (sectp
->name
, &names
->macro
))
2211 dwarf2_per_objfile
->macro
.s
.section
= sectp
;
2212 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2214 else if (section_is_p (sectp
->name
, &names
->str
))
2216 dwarf2_per_objfile
->str
.s
.section
= sectp
;
2217 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2219 else if (section_is_p (sectp
->name
, &names
->addr
))
2221 dwarf2_per_objfile
->addr
.s
.section
= sectp
;
2222 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2224 else if (section_is_p (sectp
->name
, &names
->frame
))
2226 dwarf2_per_objfile
->frame
.s
.section
= sectp
;
2227 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2229 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2231 dwarf2_per_objfile
->eh_frame
.s
.section
= sectp
;
2232 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2234 else if (section_is_p (sectp
->name
, &names
->ranges
))
2236 dwarf2_per_objfile
->ranges
.s
.section
= sectp
;
2237 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2239 else if (section_is_p (sectp
->name
, &names
->types
))
2241 struct dwarf2_section_info type_section
;
2243 memset (&type_section
, 0, sizeof (type_section
));
2244 type_section
.s
.section
= sectp
;
2245 type_section
.size
= bfd_get_section_size (sectp
);
2247 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2250 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2252 dwarf2_per_objfile
->gdb_index
.s
.section
= sectp
;
2253 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2256 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2257 && bfd_section_vma (abfd
, sectp
) == 0)
2258 dwarf2_per_objfile
->has_section_at_zero
= 1;
2261 /* A helper function that decides whether a section is empty,
2265 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2267 if (section
->is_virtual
)
2268 return section
->size
== 0;
2269 return section
->s
.section
== NULL
|| section
->size
== 0;
2272 /* Read the contents of the section INFO.
2273 OBJFILE is the main object file, but not necessarily the file where
2274 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2276 If the section is compressed, uncompress it before returning. */
2279 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2283 gdb_byte
*buf
, *retbuf
;
2287 info
->buffer
= NULL
;
2290 if (dwarf2_section_empty_p (info
))
2293 sectp
= get_section_bfd_section (info
);
2295 /* If this is a virtual section we need to read in the real one first. */
2296 if (info
->is_virtual
)
2298 struct dwarf2_section_info
*containing_section
=
2299 get_containing_section (info
);
2301 gdb_assert (sectp
!= NULL
);
2302 if ((sectp
->flags
& SEC_RELOC
) != 0)
2304 error (_("Dwarf Error: DWP format V2 with relocations is not"
2305 " supported in section %s [in module %s]"),
2306 get_section_name (info
), get_section_file_name (info
));
2308 dwarf2_read_section (objfile
, containing_section
);
2309 /* Other code should have already caught virtual sections that don't
2311 gdb_assert (info
->virtual_offset
+ info
->size
2312 <= containing_section
->size
);
2313 /* If the real section is empty or there was a problem reading the
2314 section we shouldn't get here. */
2315 gdb_assert (containing_section
->buffer
!= NULL
);
2316 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2320 /* If the section has relocations, we must read it ourselves.
2321 Otherwise we attach it to the BFD. */
2322 if ((sectp
->flags
& SEC_RELOC
) == 0)
2324 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2328 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2331 /* When debugging .o files, we may need to apply relocations; see
2332 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2333 We never compress sections in .o files, so we only need to
2334 try this when the section is not compressed. */
2335 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2338 info
->buffer
= retbuf
;
2342 abfd
= get_section_bfd_owner (info
);
2343 gdb_assert (abfd
!= NULL
);
2345 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2346 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2348 error (_("Dwarf Error: Can't read DWARF data"
2349 " in section %s [in module %s]"),
2350 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2354 /* A helper function that returns the size of a section in a safe way.
2355 If you are positive that the section has been read before using the
2356 size, then it is safe to refer to the dwarf2_section_info object's
2357 "size" field directly. In other cases, you must call this
2358 function, because for compressed sections the size field is not set
2359 correctly until the section has been read. */
2361 static bfd_size_type
2362 dwarf2_section_size (struct objfile
*objfile
,
2363 struct dwarf2_section_info
*info
)
2366 dwarf2_read_section (objfile
, info
);
2370 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2374 dwarf2_get_section_info (struct objfile
*objfile
,
2375 enum dwarf2_section_enum sect
,
2376 asection
**sectp
, const gdb_byte
**bufp
,
2377 bfd_size_type
*sizep
)
2379 struct dwarf2_per_objfile
*data
2380 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2381 dwarf2_objfile_data_key
);
2382 struct dwarf2_section_info
*info
;
2384 /* We may see an objfile without any DWARF, in which case we just
2395 case DWARF2_DEBUG_FRAME
:
2396 info
= &data
->frame
;
2398 case DWARF2_EH_FRAME
:
2399 info
= &data
->eh_frame
;
2402 gdb_assert_not_reached ("unexpected section");
2405 dwarf2_read_section (objfile
, info
);
2407 *sectp
= get_section_bfd_section (info
);
2408 *bufp
= info
->buffer
;
2409 *sizep
= info
->size
;
2412 /* A helper function to find the sections for a .dwz file. */
2415 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2417 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2419 /* Note that we only support the standard ELF names, because .dwz
2420 is ELF-only (at the time of writing). */
2421 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2423 dwz_file
->abbrev
.s
.section
= sectp
;
2424 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2426 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2428 dwz_file
->info
.s
.section
= sectp
;
2429 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2431 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2433 dwz_file
->str
.s
.section
= sectp
;
2434 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2436 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2438 dwz_file
->line
.s
.section
= sectp
;
2439 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2441 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2443 dwz_file
->macro
.s
.section
= sectp
;
2444 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2446 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2448 dwz_file
->gdb_index
.s
.section
= sectp
;
2449 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2453 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2454 there is no .gnu_debugaltlink section in the file. Error if there
2455 is such a section but the file cannot be found. */
2457 static struct dwz_file
*
2458 dwarf2_get_dwz_file (void)
2462 struct cleanup
*cleanup
;
2463 const char *filename
;
2464 struct dwz_file
*result
;
2465 bfd_size_type buildid_len_arg
;
2469 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2470 return dwarf2_per_objfile
->dwz_file
;
2472 bfd_set_error (bfd_error_no_error
);
2473 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2474 &buildid_len_arg
, &buildid
);
2477 if (bfd_get_error () == bfd_error_no_error
)
2479 error (_("could not read '.gnu_debugaltlink' section: %s"),
2480 bfd_errmsg (bfd_get_error ()));
2482 cleanup
= make_cleanup (xfree
, data
);
2483 make_cleanup (xfree
, buildid
);
2485 buildid_len
= (size_t) buildid_len_arg
;
2487 filename
= (const char *) data
;
2488 if (!IS_ABSOLUTE_PATH (filename
))
2490 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2493 make_cleanup (xfree
, abs
);
2494 abs
= ldirname (abs
);
2495 make_cleanup (xfree
, abs
);
2497 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2498 make_cleanup (xfree
, rel
);
2502 /* First try the file name given in the section. If that doesn't
2503 work, try to use the build-id instead. */
2504 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2505 if (dwz_bfd
!= NULL
)
2507 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2509 gdb_bfd_unref (dwz_bfd
);
2514 if (dwz_bfd
== NULL
)
2515 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2517 if (dwz_bfd
== NULL
)
2518 error (_("could not find '.gnu_debugaltlink' file for %s"),
2519 objfile_name (dwarf2_per_objfile
->objfile
));
2521 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2523 result
->dwz_bfd
= dwz_bfd
;
2525 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2527 do_cleanups (cleanup
);
2529 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2530 dwarf2_per_objfile
->dwz_file
= result
;
2534 /* DWARF quick_symbols_functions support. */
2536 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2537 unique line tables, so we maintain a separate table of all .debug_line
2538 derived entries to support the sharing.
2539 All the quick functions need is the list of file names. We discard the
2540 line_header when we're done and don't need to record it here. */
2541 struct quick_file_names
2543 /* The data used to construct the hash key. */
2544 struct stmt_list_hash hash
;
2546 /* The number of entries in file_names, real_names. */
2547 unsigned int num_file_names
;
2549 /* The file names from the line table, after being run through
2551 const char **file_names
;
2553 /* The file names from the line table after being run through
2554 gdb_realpath. These are computed lazily. */
2555 const char **real_names
;
2558 /* When using the index (and thus not using psymtabs), each CU has an
2559 object of this type. This is used to hold information needed by
2560 the various "quick" methods. */
2561 struct dwarf2_per_cu_quick_data
2563 /* The file table. This can be NULL if there was no file table
2564 or it's currently not read in.
2565 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2566 struct quick_file_names
*file_names
;
2568 /* The corresponding symbol table. This is NULL if symbols for this
2569 CU have not yet been read. */
2570 struct compunit_symtab
*compunit_symtab
;
2572 /* A temporary mark bit used when iterating over all CUs in
2573 expand_symtabs_matching. */
2574 unsigned int mark
: 1;
2576 /* True if we've tried to read the file table and found there isn't one.
2577 There will be no point in trying to read it again next time. */
2578 unsigned int no_file_data
: 1;
2581 /* Utility hash function for a stmt_list_hash. */
2584 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2588 if (stmt_list_hash
->dwo_unit
!= NULL
)
2589 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2590 v
+= stmt_list_hash
->line_offset
.sect_off
;
2594 /* Utility equality function for a stmt_list_hash. */
2597 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2598 const struct stmt_list_hash
*rhs
)
2600 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2602 if (lhs
->dwo_unit
!= NULL
2603 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2606 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2609 /* Hash function for a quick_file_names. */
2612 hash_file_name_entry (const void *e
)
2614 const struct quick_file_names
*file_data
2615 = (const struct quick_file_names
*) e
;
2617 return hash_stmt_list_entry (&file_data
->hash
);
2620 /* Equality function for a quick_file_names. */
2623 eq_file_name_entry (const void *a
, const void *b
)
2625 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2626 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2628 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2631 /* Delete function for a quick_file_names. */
2634 delete_file_name_entry (void *e
)
2636 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2639 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2641 xfree ((void*) file_data
->file_names
[i
]);
2642 if (file_data
->real_names
)
2643 xfree ((void*) file_data
->real_names
[i
]);
2646 /* The space for the struct itself lives on objfile_obstack,
2647 so we don't free it here. */
2650 /* Create a quick_file_names hash table. */
2653 create_quick_file_names_table (unsigned int nr_initial_entries
)
2655 return htab_create_alloc (nr_initial_entries
,
2656 hash_file_name_entry
, eq_file_name_entry
,
2657 delete_file_name_entry
, xcalloc
, xfree
);
2660 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2661 have to be created afterwards. You should call age_cached_comp_units after
2662 processing PER_CU->CU. dw2_setup must have been already called. */
2665 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2667 if (per_cu
->is_debug_types
)
2668 load_full_type_unit (per_cu
);
2670 load_full_comp_unit (per_cu
, language_minimal
);
2672 if (per_cu
->cu
== NULL
)
2673 return; /* Dummy CU. */
2675 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2678 /* Read in the symbols for PER_CU. */
2681 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2683 struct cleanup
*back_to
;
2685 /* Skip type_unit_groups, reading the type units they contain
2686 is handled elsewhere. */
2687 if (IS_TYPE_UNIT_GROUP (per_cu
))
2690 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2692 if (dwarf2_per_objfile
->using_index
2693 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2694 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2696 queue_comp_unit (per_cu
, language_minimal
);
2699 /* If we just loaded a CU from a DWO, and we're working with an index
2700 that may badly handle TUs, load all the TUs in that DWO as well.
2701 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2702 if (!per_cu
->is_debug_types
2703 && per_cu
->cu
!= NULL
2704 && per_cu
->cu
->dwo_unit
!= NULL
2705 && dwarf2_per_objfile
->index_table
!= NULL
2706 && dwarf2_per_objfile
->index_table
->version
<= 7
2707 /* DWP files aren't supported yet. */
2708 && get_dwp_file () == NULL
)
2709 queue_and_load_all_dwo_tus (per_cu
);
2714 /* Age the cache, releasing compilation units that have not
2715 been used recently. */
2716 age_cached_comp_units ();
2718 do_cleanups (back_to
);
2721 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2722 the objfile from which this CU came. Returns the resulting symbol
2725 static struct compunit_symtab
*
2726 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2728 gdb_assert (dwarf2_per_objfile
->using_index
);
2729 if (!per_cu
->v
.quick
->compunit_symtab
)
2731 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2732 increment_reading_symtab ();
2733 dw2_do_instantiate_symtab (per_cu
);
2734 process_cu_includes ();
2735 do_cleanups (back_to
);
2738 return per_cu
->v
.quick
->compunit_symtab
;
2741 /* Return the CU/TU given its index.
2743 This is intended for loops like:
2745 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2746 + dwarf2_per_objfile->n_type_units); ++i)
2748 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2754 static struct dwarf2_per_cu_data
*
2755 dw2_get_cutu (int index
)
2757 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2759 index
-= dwarf2_per_objfile
->n_comp_units
;
2760 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2761 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2764 return dwarf2_per_objfile
->all_comp_units
[index
];
2767 /* Return the CU given its index.
2768 This differs from dw2_get_cutu in that it's for when you know INDEX
2771 static struct dwarf2_per_cu_data
*
2772 dw2_get_cu (int index
)
2774 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2776 return dwarf2_per_objfile
->all_comp_units
[index
];
2779 /* A helper for create_cus_from_index that handles a given list of
2783 create_cus_from_index_list (struct objfile
*objfile
,
2784 const gdb_byte
*cu_list
, offset_type n_elements
,
2785 struct dwarf2_section_info
*section
,
2791 for (i
= 0; i
< n_elements
; i
+= 2)
2793 struct dwarf2_per_cu_data
*the_cu
;
2794 ULONGEST offset
, length
;
2796 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2797 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2798 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2801 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2802 struct dwarf2_per_cu_data
);
2803 the_cu
->offset
.sect_off
= offset
;
2804 the_cu
->length
= length
;
2805 the_cu
->objfile
= objfile
;
2806 the_cu
->section
= section
;
2807 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2808 struct dwarf2_per_cu_quick_data
);
2809 the_cu
->is_dwz
= is_dwz
;
2810 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2814 /* Read the CU list from the mapped index, and use it to create all
2815 the CU objects for this objfile. */
2818 create_cus_from_index (struct objfile
*objfile
,
2819 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2820 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2822 struct dwz_file
*dwz
;
2824 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2825 dwarf2_per_objfile
->all_comp_units
=
2826 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
2827 dwarf2_per_objfile
->n_comp_units
);
2829 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2830 &dwarf2_per_objfile
->info
, 0, 0);
2832 if (dwz_elements
== 0)
2835 dwz
= dwarf2_get_dwz_file ();
2836 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2837 cu_list_elements
/ 2);
2840 /* Create the signatured type hash table from the index. */
2843 create_signatured_type_table_from_index (struct objfile
*objfile
,
2844 struct dwarf2_section_info
*section
,
2845 const gdb_byte
*bytes
,
2846 offset_type elements
)
2849 htab_t sig_types_hash
;
2851 dwarf2_per_objfile
->n_type_units
2852 = dwarf2_per_objfile
->n_allocated_type_units
2854 dwarf2_per_objfile
->all_type_units
=
2855 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
2857 sig_types_hash
= allocate_signatured_type_table (objfile
);
2859 for (i
= 0; i
< elements
; i
+= 3)
2861 struct signatured_type
*sig_type
;
2862 ULONGEST offset
, type_offset_in_tu
, signature
;
2865 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2866 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2867 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2869 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2872 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2873 struct signatured_type
);
2874 sig_type
->signature
= signature
;
2875 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2876 sig_type
->per_cu
.is_debug_types
= 1;
2877 sig_type
->per_cu
.section
= section
;
2878 sig_type
->per_cu
.offset
.sect_off
= offset
;
2879 sig_type
->per_cu
.objfile
= objfile
;
2880 sig_type
->per_cu
.v
.quick
2881 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2882 struct dwarf2_per_cu_quick_data
);
2884 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2887 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2890 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2893 /* Read the address map data from the mapped index, and use it to
2894 populate the objfile's psymtabs_addrmap. */
2897 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2899 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2900 const gdb_byte
*iter
, *end
;
2901 struct obstack temp_obstack
;
2902 struct addrmap
*mutable_map
;
2903 struct cleanup
*cleanup
;
2906 obstack_init (&temp_obstack
);
2907 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2908 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2910 iter
= index
->address_table
;
2911 end
= iter
+ index
->address_table_size
;
2913 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2917 ULONGEST hi
, lo
, cu_index
;
2918 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2920 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2922 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2927 complaint (&symfile_complaints
,
2928 _(".gdb_index address table has invalid range (%s - %s)"),
2929 hex_string (lo
), hex_string (hi
));
2933 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2935 complaint (&symfile_complaints
,
2936 _(".gdb_index address table has invalid CU number %u"),
2937 (unsigned) cu_index
);
2941 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2942 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2943 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2946 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2947 &objfile
->objfile_obstack
);
2948 do_cleanups (cleanup
);
2951 /* The hash function for strings in the mapped index. This is the same as
2952 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2953 implementation. This is necessary because the hash function is tied to the
2954 format of the mapped index file. The hash values do not have to match with
2957 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2960 mapped_index_string_hash (int index_version
, const void *p
)
2962 const unsigned char *str
= (const unsigned char *) p
;
2966 while ((c
= *str
++) != 0)
2968 if (index_version
>= 5)
2970 r
= r
* 67 + c
- 113;
2976 /* Find a slot in the mapped index INDEX for the object named NAME.
2977 If NAME is found, set *VEC_OUT to point to the CU vector in the
2978 constant pool and return 1. If NAME cannot be found, return 0. */
2981 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2982 offset_type
**vec_out
)
2984 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2986 offset_type slot
, step
;
2987 int (*cmp
) (const char *, const char *);
2989 if (current_language
->la_language
== language_cplus
2990 || current_language
->la_language
== language_java
2991 || current_language
->la_language
== language_fortran
2992 || current_language
->la_language
== language_d
)
2994 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2997 if (strchr (name
, '(') != NULL
)
2999 char *without_params
= cp_remove_params (name
);
3001 if (without_params
!= NULL
)
3003 make_cleanup (xfree
, without_params
);
3004 name
= without_params
;
3009 /* Index version 4 did not support case insensitive searches. But the
3010 indices for case insensitive languages are built in lowercase, therefore
3011 simulate our NAME being searched is also lowercased. */
3012 hash
= mapped_index_string_hash ((index
->version
== 4
3013 && case_sensitivity
== case_sensitive_off
3014 ? 5 : index
->version
),
3017 slot
= hash
& (index
->symbol_table_slots
- 1);
3018 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3019 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3023 /* Convert a slot number to an offset into the table. */
3024 offset_type i
= 2 * slot
;
3026 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3028 do_cleanups (back_to
);
3032 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3033 if (!cmp (name
, str
))
3035 *vec_out
= (offset_type
*) (index
->constant_pool
3036 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3037 do_cleanups (back_to
);
3041 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3045 /* A helper function that reads the .gdb_index from SECTION and fills
3046 in MAP. FILENAME is the name of the file containing the section;
3047 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3048 ok to use deprecated sections.
3050 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3051 out parameters that are filled in with information about the CU and
3052 TU lists in the section.
3054 Returns 1 if all went well, 0 otherwise. */
3057 read_index_from_section (struct objfile
*objfile
,
3058 const char *filename
,
3060 struct dwarf2_section_info
*section
,
3061 struct mapped_index
*map
,
3062 const gdb_byte
**cu_list
,
3063 offset_type
*cu_list_elements
,
3064 const gdb_byte
**types_list
,
3065 offset_type
*types_list_elements
)
3067 const gdb_byte
*addr
;
3068 offset_type version
;
3069 offset_type
*metadata
;
3072 if (dwarf2_section_empty_p (section
))
3075 /* Older elfutils strip versions could keep the section in the main
3076 executable while splitting it for the separate debug info file. */
3077 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3080 dwarf2_read_section (objfile
, section
);
3082 addr
= section
->buffer
;
3083 /* Version check. */
3084 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3085 /* Versions earlier than 3 emitted every copy of a psymbol. This
3086 causes the index to behave very poorly for certain requests. Version 3
3087 contained incomplete addrmap. So, it seems better to just ignore such
3091 static int warning_printed
= 0;
3092 if (!warning_printed
)
3094 warning (_("Skipping obsolete .gdb_index section in %s."),
3096 warning_printed
= 1;
3100 /* Index version 4 uses a different hash function than index version
3103 Versions earlier than 6 did not emit psymbols for inlined
3104 functions. Using these files will cause GDB not to be able to
3105 set breakpoints on inlined functions by name, so we ignore these
3106 indices unless the user has done
3107 "set use-deprecated-index-sections on". */
3108 if (version
< 6 && !deprecated_ok
)
3110 static int warning_printed
= 0;
3111 if (!warning_printed
)
3114 Skipping deprecated .gdb_index section in %s.\n\
3115 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3116 to use the section anyway."),
3118 warning_printed
= 1;
3122 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3123 of the TU (for symbols coming from TUs),
3124 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3125 Plus gold-generated indices can have duplicate entries for global symbols,
3126 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3127 These are just performance bugs, and we can't distinguish gdb-generated
3128 indices from gold-generated ones, so issue no warning here. */
3130 /* Indexes with higher version than the one supported by GDB may be no
3131 longer backward compatible. */
3135 map
->version
= version
;
3136 map
->total_size
= section
->size
;
3138 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3141 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3142 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3146 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3147 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3148 - MAYBE_SWAP (metadata
[i
]))
3152 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3153 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3154 - MAYBE_SWAP (metadata
[i
]));
3157 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3158 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3159 - MAYBE_SWAP (metadata
[i
]))
3160 / (2 * sizeof (offset_type
)));
3163 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3169 /* Read the index file. If everything went ok, initialize the "quick"
3170 elements of all the CUs and return 1. Otherwise, return 0. */
3173 dwarf2_read_index (struct objfile
*objfile
)
3175 struct mapped_index local_map
, *map
;
3176 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3177 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3178 struct dwz_file
*dwz
;
3180 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3181 use_deprecated_index_sections
,
3182 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3183 &cu_list
, &cu_list_elements
,
3184 &types_list
, &types_list_elements
))
3187 /* Don't use the index if it's empty. */
3188 if (local_map
.symbol_table_slots
== 0)
3191 /* If there is a .dwz file, read it so we can get its CU list as
3193 dwz
= dwarf2_get_dwz_file ();
3196 struct mapped_index dwz_map
;
3197 const gdb_byte
*dwz_types_ignore
;
3198 offset_type dwz_types_elements_ignore
;
3200 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3202 &dwz
->gdb_index
, &dwz_map
,
3203 &dwz_list
, &dwz_list_elements
,
3205 &dwz_types_elements_ignore
))
3207 warning (_("could not read '.gdb_index' section from %s; skipping"),
3208 bfd_get_filename (dwz
->dwz_bfd
));
3213 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3216 if (types_list_elements
)
3218 struct dwarf2_section_info
*section
;
3220 /* We can only handle a single .debug_types when we have an
3222 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3225 section
= VEC_index (dwarf2_section_info_def
,
3226 dwarf2_per_objfile
->types
, 0);
3228 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3229 types_list_elements
);
3232 create_addrmap_from_index (objfile
, &local_map
);
3234 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3237 dwarf2_per_objfile
->index_table
= map
;
3238 dwarf2_per_objfile
->using_index
= 1;
3239 dwarf2_per_objfile
->quick_file_names_table
=
3240 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3245 /* A helper for the "quick" functions which sets the global
3246 dwarf2_per_objfile according to OBJFILE. */
3249 dw2_setup (struct objfile
*objfile
)
3251 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3252 objfile_data (objfile
, dwarf2_objfile_data_key
));
3253 gdb_assert (dwarf2_per_objfile
);
3256 /* die_reader_func for dw2_get_file_names. */
3259 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3260 const gdb_byte
*info_ptr
,
3261 struct die_info
*comp_unit_die
,
3265 struct dwarf2_cu
*cu
= reader
->cu
;
3266 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3267 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3268 struct dwarf2_per_cu_data
*lh_cu
;
3269 struct line_header
*lh
;
3270 struct attribute
*attr
;
3272 const char *name
, *comp_dir
;
3274 struct quick_file_names
*qfn
;
3275 unsigned int line_offset
;
3277 gdb_assert (! this_cu
->is_debug_types
);
3279 /* Our callers never want to match partial units -- instead they
3280 will match the enclosing full CU. */
3281 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3283 this_cu
->v
.quick
->no_file_data
= 1;
3292 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3295 struct quick_file_names find_entry
;
3297 line_offset
= DW_UNSND (attr
);
3299 /* We may have already read in this line header (TU line header sharing).
3300 If we have we're done. */
3301 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3302 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3303 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3304 &find_entry
, INSERT
);
3307 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3311 lh
= dwarf_decode_line_header (line_offset
, cu
);
3315 lh_cu
->v
.quick
->no_file_data
= 1;
3319 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3320 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3321 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3322 gdb_assert (slot
!= NULL
);
3325 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3327 qfn
->num_file_names
= lh
->num_file_names
;
3329 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->num_file_names
);
3330 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3331 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3332 qfn
->real_names
= NULL
;
3334 free_line_header (lh
);
3336 lh_cu
->v
.quick
->file_names
= qfn
;
3339 /* A helper for the "quick" functions which attempts to read the line
3340 table for THIS_CU. */
3342 static struct quick_file_names
*
3343 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3345 /* This should never be called for TUs. */
3346 gdb_assert (! this_cu
->is_debug_types
);
3347 /* Nor type unit groups. */
3348 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3350 if (this_cu
->v
.quick
->file_names
!= NULL
)
3351 return this_cu
->v
.quick
->file_names
;
3352 /* If we know there is no line data, no point in looking again. */
3353 if (this_cu
->v
.quick
->no_file_data
)
3356 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3358 if (this_cu
->v
.quick
->no_file_data
)
3360 return this_cu
->v
.quick
->file_names
;
3363 /* A helper for the "quick" functions which computes and caches the
3364 real path for a given file name from the line table. */
3367 dw2_get_real_path (struct objfile
*objfile
,
3368 struct quick_file_names
*qfn
, int index
)
3370 if (qfn
->real_names
== NULL
)
3371 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3372 qfn
->num_file_names
, const char *);
3374 if (qfn
->real_names
[index
] == NULL
)
3375 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3377 return qfn
->real_names
[index
];
3380 static struct symtab
*
3381 dw2_find_last_source_symtab (struct objfile
*objfile
)
3383 struct compunit_symtab
*cust
;
3386 dw2_setup (objfile
);
3387 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3388 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3391 return compunit_primary_filetab (cust
);
3394 /* Traversal function for dw2_forget_cached_source_info. */
3397 dw2_free_cached_file_names (void **slot
, void *info
)
3399 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3401 if (file_data
->real_names
)
3405 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3407 xfree ((void*) file_data
->real_names
[i
]);
3408 file_data
->real_names
[i
] = NULL
;
3416 dw2_forget_cached_source_info (struct objfile
*objfile
)
3418 dw2_setup (objfile
);
3420 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3421 dw2_free_cached_file_names
, NULL
);
3424 /* Helper function for dw2_map_symtabs_matching_filename that expands
3425 the symtabs and calls the iterator. */
3428 dw2_map_expand_apply (struct objfile
*objfile
,
3429 struct dwarf2_per_cu_data
*per_cu
,
3430 const char *name
, const char *real_path
,
3431 int (*callback
) (struct symtab
*, void *),
3434 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3436 /* Don't visit already-expanded CUs. */
3437 if (per_cu
->v
.quick
->compunit_symtab
)
3440 /* This may expand more than one symtab, and we want to iterate over
3442 dw2_instantiate_symtab (per_cu
);
3444 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3445 objfile
->compunit_symtabs
, last_made
);
3448 /* Implementation of the map_symtabs_matching_filename method. */
3451 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3452 const char *real_path
,
3453 int (*callback
) (struct symtab
*, void *),
3457 const char *name_basename
= lbasename (name
);
3459 dw2_setup (objfile
);
3461 /* The rule is CUs specify all the files, including those used by
3462 any TU, so there's no need to scan TUs here. */
3464 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3467 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3468 struct quick_file_names
*file_data
;
3470 /* We only need to look at symtabs not already expanded. */
3471 if (per_cu
->v
.quick
->compunit_symtab
)
3474 file_data
= dw2_get_file_names (per_cu
);
3475 if (file_data
== NULL
)
3478 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3480 const char *this_name
= file_data
->file_names
[j
];
3481 const char *this_real_name
;
3483 if (compare_filenames_for_search (this_name
, name
))
3485 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3491 /* Before we invoke realpath, which can get expensive when many
3492 files are involved, do a quick comparison of the basenames. */
3493 if (! basenames_may_differ
3494 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3497 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3498 if (compare_filenames_for_search (this_real_name
, name
))
3500 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3506 if (real_path
!= NULL
)
3508 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3509 gdb_assert (IS_ABSOLUTE_PATH (name
));
3510 if (this_real_name
!= NULL
3511 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3513 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3525 /* Struct used to manage iterating over all CUs looking for a symbol. */
3527 struct dw2_symtab_iterator
3529 /* The internalized form of .gdb_index. */
3530 struct mapped_index
*index
;
3531 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3532 int want_specific_block
;
3533 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3534 Unused if !WANT_SPECIFIC_BLOCK. */
3536 /* The kind of symbol we're looking for. */
3538 /* The list of CUs from the index entry of the symbol,
3539 or NULL if not found. */
3541 /* The next element in VEC to look at. */
3543 /* The number of elements in VEC, or zero if there is no match. */
3545 /* Have we seen a global version of the symbol?
3546 If so we can ignore all further global instances.
3547 This is to work around gold/15646, inefficient gold-generated
3552 /* Initialize the index symtab iterator ITER.
3553 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3554 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3557 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3558 struct mapped_index
*index
,
3559 int want_specific_block
,
3564 iter
->index
= index
;
3565 iter
->want_specific_block
= want_specific_block
;
3566 iter
->block_index
= block_index
;
3567 iter
->domain
= domain
;
3569 iter
->global_seen
= 0;
3571 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3572 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3580 /* Return the next matching CU or NULL if there are no more. */
3582 static struct dwarf2_per_cu_data
*
3583 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3585 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3587 offset_type cu_index_and_attrs
=
3588 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3589 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3590 struct dwarf2_per_cu_data
*per_cu
;
3591 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3592 /* This value is only valid for index versions >= 7. */
3593 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3594 gdb_index_symbol_kind symbol_kind
=
3595 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3596 /* Only check the symbol attributes if they're present.
3597 Indices prior to version 7 don't record them,
3598 and indices >= 7 may elide them for certain symbols
3599 (gold does this). */
3601 (iter
->index
->version
>= 7
3602 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3604 /* Don't crash on bad data. */
3605 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3606 + dwarf2_per_objfile
->n_type_units
))
3608 complaint (&symfile_complaints
,
3609 _(".gdb_index entry has bad CU index"
3611 objfile_name (dwarf2_per_objfile
->objfile
));
3615 per_cu
= dw2_get_cutu (cu_index
);
3617 /* Skip if already read in. */
3618 if (per_cu
->v
.quick
->compunit_symtab
)
3621 /* Check static vs global. */
3624 if (iter
->want_specific_block
3625 && want_static
!= is_static
)
3627 /* Work around gold/15646. */
3628 if (!is_static
&& iter
->global_seen
)
3631 iter
->global_seen
= 1;
3634 /* Only check the symbol's kind if it has one. */
3637 switch (iter
->domain
)
3640 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3641 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3642 /* Some types are also in VAR_DOMAIN. */
3643 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3647 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3651 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3666 static struct compunit_symtab
*
3667 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3668 const char *name
, domain_enum domain
)
3670 struct compunit_symtab
*stab_best
= NULL
;
3671 struct mapped_index
*index
;
3673 dw2_setup (objfile
);
3675 index
= dwarf2_per_objfile
->index_table
;
3677 /* index is NULL if OBJF_READNOW. */
3680 struct dw2_symtab_iterator iter
;
3681 struct dwarf2_per_cu_data
*per_cu
;
3683 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3685 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3687 struct symbol
*sym
, *with_opaque
= NULL
;
3688 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3689 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3690 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3692 sym
= block_find_symbol (block
, name
, domain
,
3693 block_find_non_opaque_type_preferred
,
3696 /* Some caution must be observed with overloaded functions
3697 and methods, since the index will not contain any overload
3698 information (but NAME might contain it). */
3701 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3703 if (with_opaque
!= NULL
3704 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3707 /* Keep looking through other CUs. */
3715 dw2_print_stats (struct objfile
*objfile
)
3717 int i
, total
, count
;
3719 dw2_setup (objfile
);
3720 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3722 for (i
= 0; i
< total
; ++i
)
3724 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3726 if (!per_cu
->v
.quick
->compunit_symtab
)
3729 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3730 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3733 /* This dumps minimal information about the index.
3734 It is called via "mt print objfiles".
3735 One use is to verify .gdb_index has been loaded by the
3736 gdb.dwarf2/gdb-index.exp testcase. */
3739 dw2_dump (struct objfile
*objfile
)
3741 dw2_setup (objfile
);
3742 gdb_assert (dwarf2_per_objfile
->using_index
);
3743 printf_filtered (".gdb_index:");
3744 if (dwarf2_per_objfile
->index_table
!= NULL
)
3746 printf_filtered (" version %d\n",
3747 dwarf2_per_objfile
->index_table
->version
);
3750 printf_filtered (" faked for \"readnow\"\n");
3751 printf_filtered ("\n");
3755 dw2_relocate (struct objfile
*objfile
,
3756 const struct section_offsets
*new_offsets
,
3757 const struct section_offsets
*delta
)
3759 /* There's nothing to relocate here. */
3763 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3764 const char *func_name
)
3766 struct mapped_index
*index
;
3768 dw2_setup (objfile
);
3770 index
= dwarf2_per_objfile
->index_table
;
3772 /* index is NULL if OBJF_READNOW. */
3775 struct dw2_symtab_iterator iter
;
3776 struct dwarf2_per_cu_data
*per_cu
;
3778 /* Note: It doesn't matter what we pass for block_index here. */
3779 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3782 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3783 dw2_instantiate_symtab (per_cu
);
3788 dw2_expand_all_symtabs (struct objfile
*objfile
)
3792 dw2_setup (objfile
);
3794 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3795 + dwarf2_per_objfile
->n_type_units
); ++i
)
3797 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3799 dw2_instantiate_symtab (per_cu
);
3804 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3805 const char *fullname
)
3809 dw2_setup (objfile
);
3811 /* We don't need to consider type units here.
3812 This is only called for examining code, e.g. expand_line_sal.
3813 There can be an order of magnitude (or more) more type units
3814 than comp units, and we avoid them if we can. */
3816 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3819 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3820 struct quick_file_names
*file_data
;
3822 /* We only need to look at symtabs not already expanded. */
3823 if (per_cu
->v
.quick
->compunit_symtab
)
3826 file_data
= dw2_get_file_names (per_cu
);
3827 if (file_data
== NULL
)
3830 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3832 const char *this_fullname
= file_data
->file_names
[j
];
3834 if (filename_cmp (this_fullname
, fullname
) == 0)
3836 dw2_instantiate_symtab (per_cu
);
3844 dw2_map_matching_symbols (struct objfile
*objfile
,
3845 const char * name
, domain_enum domain
,
3847 int (*callback
) (struct block
*,
3848 struct symbol
*, void *),
3849 void *data
, symbol_compare_ftype
*match
,
3850 symbol_compare_ftype
*ordered_compare
)
3852 /* Currently unimplemented; used for Ada. The function can be called if the
3853 current language is Ada for a non-Ada objfile using GNU index. As Ada
3854 does not look for non-Ada symbols this function should just return. */
3858 dw2_expand_symtabs_matching
3859 (struct objfile
*objfile
,
3860 expand_symtabs_file_matcher_ftype
*file_matcher
,
3861 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3862 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3863 enum search_domain kind
,
3868 struct mapped_index
*index
;
3870 dw2_setup (objfile
);
3872 /* index_table is NULL if OBJF_READNOW. */
3873 if (!dwarf2_per_objfile
->index_table
)
3875 index
= dwarf2_per_objfile
->index_table
;
3877 if (file_matcher
!= NULL
)
3879 struct cleanup
*cleanup
;
3880 htab_t visited_found
, visited_not_found
;
3882 visited_found
= htab_create_alloc (10,
3883 htab_hash_pointer
, htab_eq_pointer
,
3884 NULL
, xcalloc
, xfree
);
3885 cleanup
= make_cleanup_htab_delete (visited_found
);
3886 visited_not_found
= htab_create_alloc (10,
3887 htab_hash_pointer
, htab_eq_pointer
,
3888 NULL
, xcalloc
, xfree
);
3889 make_cleanup_htab_delete (visited_not_found
);
3891 /* The rule is CUs specify all the files, including those used by
3892 any TU, so there's no need to scan TUs here. */
3894 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3897 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3898 struct quick_file_names
*file_data
;
3903 per_cu
->v
.quick
->mark
= 0;
3905 /* We only need to look at symtabs not already expanded. */
3906 if (per_cu
->v
.quick
->compunit_symtab
)
3909 file_data
= dw2_get_file_names (per_cu
);
3910 if (file_data
== NULL
)
3913 if (htab_find (visited_not_found
, file_data
) != NULL
)
3915 else if (htab_find (visited_found
, file_data
) != NULL
)
3917 per_cu
->v
.quick
->mark
= 1;
3921 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3923 const char *this_real_name
;
3925 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3927 per_cu
->v
.quick
->mark
= 1;
3931 /* Before we invoke realpath, which can get expensive when many
3932 files are involved, do a quick comparison of the basenames. */
3933 if (!basenames_may_differ
3934 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3938 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3939 if (file_matcher (this_real_name
, data
, 0))
3941 per_cu
->v
.quick
->mark
= 1;
3946 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3948 : visited_not_found
,
3953 do_cleanups (cleanup
);
3956 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3958 offset_type idx
= 2 * iter
;
3960 offset_type
*vec
, vec_len
, vec_idx
;
3961 int global_seen
= 0;
3965 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3968 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3970 if (! (*symbol_matcher
) (name
, data
))
3973 /* The name was matched, now expand corresponding CUs that were
3975 vec
= (offset_type
*) (index
->constant_pool
3976 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3977 vec_len
= MAYBE_SWAP (vec
[0]);
3978 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3980 struct dwarf2_per_cu_data
*per_cu
;
3981 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3982 /* This value is only valid for index versions >= 7. */
3983 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3984 gdb_index_symbol_kind symbol_kind
=
3985 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3986 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3987 /* Only check the symbol attributes if they're present.
3988 Indices prior to version 7 don't record them,
3989 and indices >= 7 may elide them for certain symbols
3990 (gold does this). */
3992 (index
->version
>= 7
3993 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3995 /* Work around gold/15646. */
3998 if (!is_static
&& global_seen
)
4004 /* Only check the symbol's kind if it has one. */
4009 case VARIABLES_DOMAIN
:
4010 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4013 case FUNCTIONS_DOMAIN
:
4014 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4018 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4026 /* Don't crash on bad data. */
4027 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4028 + dwarf2_per_objfile
->n_type_units
))
4030 complaint (&symfile_complaints
,
4031 _(".gdb_index entry has bad CU index"
4032 " [in module %s]"), objfile_name (objfile
));
4036 per_cu
= dw2_get_cutu (cu_index
);
4037 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4039 int symtab_was_null
=
4040 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4042 dw2_instantiate_symtab (per_cu
);
4044 if (expansion_notify
!= NULL
4046 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4048 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4056 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4059 static struct compunit_symtab
*
4060 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4065 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4066 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4069 if (cust
->includes
== NULL
)
4072 for (i
= 0; cust
->includes
[i
]; ++i
)
4074 struct compunit_symtab
*s
= cust
->includes
[i
];
4076 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4084 static struct compunit_symtab
*
4085 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4086 struct bound_minimal_symbol msymbol
,
4088 struct obj_section
*section
,
4091 struct dwarf2_per_cu_data
*data
;
4092 struct compunit_symtab
*result
;
4094 dw2_setup (objfile
);
4096 if (!objfile
->psymtabs_addrmap
)
4099 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4104 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4105 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4106 paddress (get_objfile_arch (objfile
), pc
));
4109 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4111 gdb_assert (result
!= NULL
);
4116 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4117 void *data
, int need_fullname
)
4120 struct cleanup
*cleanup
;
4121 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4122 NULL
, xcalloc
, xfree
);
4124 cleanup
= make_cleanup_htab_delete (visited
);
4125 dw2_setup (objfile
);
4127 /* The rule is CUs specify all the files, including those used by
4128 any TU, so there's no need to scan TUs here.
4129 We can ignore file names coming from already-expanded CUs. */
4131 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4133 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4135 if (per_cu
->v
.quick
->compunit_symtab
)
4137 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4140 *slot
= per_cu
->v
.quick
->file_names
;
4144 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4147 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4148 struct quick_file_names
*file_data
;
4151 /* We only need to look at symtabs not already expanded. */
4152 if (per_cu
->v
.quick
->compunit_symtab
)
4155 file_data
= dw2_get_file_names (per_cu
);
4156 if (file_data
== NULL
)
4159 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4162 /* Already visited. */
4167 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4169 const char *this_real_name
;
4172 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4174 this_real_name
= NULL
;
4175 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4179 do_cleanups (cleanup
);
4183 dw2_has_symbols (struct objfile
*objfile
)
4188 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4191 dw2_find_last_source_symtab
,
4192 dw2_forget_cached_source_info
,
4193 dw2_map_symtabs_matching_filename
,
4198 dw2_expand_symtabs_for_function
,
4199 dw2_expand_all_symtabs
,
4200 dw2_expand_symtabs_with_fullname
,
4201 dw2_map_matching_symbols
,
4202 dw2_expand_symtabs_matching
,
4203 dw2_find_pc_sect_compunit_symtab
,
4204 dw2_map_symbol_filenames
4207 /* Initialize for reading DWARF for this objfile. Return 0 if this
4208 file will use psymtabs, or 1 if using the GNU index. */
4211 dwarf2_initialize_objfile (struct objfile
*objfile
)
4213 /* If we're about to read full symbols, don't bother with the
4214 indices. In this case we also don't care if some other debug
4215 format is making psymtabs, because they are all about to be
4217 if ((objfile
->flags
& OBJF_READNOW
))
4221 dwarf2_per_objfile
->using_index
= 1;
4222 create_all_comp_units (objfile
);
4223 create_all_type_units (objfile
);
4224 dwarf2_per_objfile
->quick_file_names_table
=
4225 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4227 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4228 + dwarf2_per_objfile
->n_type_units
); ++i
)
4230 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4232 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4233 struct dwarf2_per_cu_quick_data
);
4236 /* Return 1 so that gdb sees the "quick" functions. However,
4237 these functions will be no-ops because we will have expanded
4242 if (dwarf2_read_index (objfile
))
4250 /* Build a partial symbol table. */
4253 dwarf2_build_psymtabs (struct objfile
*objfile
)
4256 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4258 init_psymbol_list (objfile
, 1024);
4263 /* This isn't really ideal: all the data we allocate on the
4264 objfile's obstack is still uselessly kept around. However,
4265 freeing it seems unsafe. */
4266 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4268 dwarf2_build_psymtabs_hard (objfile
);
4269 discard_cleanups (cleanups
);
4271 CATCH (except
, RETURN_MASK_ERROR
)
4273 exception_print (gdb_stderr
, except
);
4278 /* Return the total length of the CU described by HEADER. */
4281 get_cu_length (const struct comp_unit_head
*header
)
4283 return header
->initial_length_size
+ header
->length
;
4286 /* Return TRUE if OFFSET is within CU_HEADER. */
4289 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4291 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4292 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4294 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4297 /* Find the base address of the compilation unit for range lists and
4298 location lists. It will normally be specified by DW_AT_low_pc.
4299 In DWARF-3 draft 4, the base address could be overridden by
4300 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4301 compilation units with discontinuous ranges. */
4304 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4306 struct attribute
*attr
;
4309 cu
->base_address
= 0;
4311 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4314 cu
->base_address
= attr_value_as_address (attr
);
4319 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4322 cu
->base_address
= attr_value_as_address (attr
);
4328 /* Read in the comp unit header information from the debug_info at info_ptr.
4329 NOTE: This leaves members offset, first_die_offset to be filled in
4332 static const gdb_byte
*
4333 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4334 const gdb_byte
*info_ptr
, bfd
*abfd
)
4337 unsigned int bytes_read
;
4339 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4340 cu_header
->initial_length_size
= bytes_read
;
4341 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4342 info_ptr
+= bytes_read
;
4343 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4345 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4347 info_ptr
+= bytes_read
;
4348 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4350 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4351 if (signed_addr
< 0)
4352 internal_error (__FILE__
, __LINE__
,
4353 _("read_comp_unit_head: dwarf from non elf file"));
4354 cu_header
->signed_addr_p
= signed_addr
;
4359 /* Helper function that returns the proper abbrev section for
4362 static struct dwarf2_section_info
*
4363 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4365 struct dwarf2_section_info
*abbrev
;
4367 if (this_cu
->is_dwz
)
4368 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4370 abbrev
= &dwarf2_per_objfile
->abbrev
;
4375 /* Subroutine of read_and_check_comp_unit_head and
4376 read_and_check_type_unit_head to simplify them.
4377 Perform various error checking on the header. */
4380 error_check_comp_unit_head (struct comp_unit_head
*header
,
4381 struct dwarf2_section_info
*section
,
4382 struct dwarf2_section_info
*abbrev_section
)
4384 bfd
*abfd
= get_section_bfd_owner (section
);
4385 const char *filename
= get_section_file_name (section
);
4387 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4388 error (_("Dwarf Error: wrong version in compilation unit header "
4389 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4392 if (header
->abbrev_offset
.sect_off
4393 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4394 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4395 "(offset 0x%lx + 6) [in module %s]"),
4396 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4399 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4400 avoid potential 32-bit overflow. */
4401 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4403 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4404 "(offset 0x%lx + 0) [in module %s]"),
4405 (long) header
->length
, (long) header
->offset
.sect_off
,
4409 /* Read in a CU/TU header and perform some basic error checking.
4410 The contents of the header are stored in HEADER.
4411 The result is a pointer to the start of the first DIE. */
4413 static const gdb_byte
*
4414 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4415 struct dwarf2_section_info
*section
,
4416 struct dwarf2_section_info
*abbrev_section
,
4417 const gdb_byte
*info_ptr
,
4418 int is_debug_types_section
)
4420 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4421 bfd
*abfd
= get_section_bfd_owner (section
);
4423 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4425 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4427 /* If we're reading a type unit, skip over the signature and
4428 type_offset fields. */
4429 if (is_debug_types_section
)
4430 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4432 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4434 error_check_comp_unit_head (header
, section
, abbrev_section
);
4439 /* Read in the types comp unit header information from .debug_types entry at
4440 types_ptr. The result is a pointer to one past the end of the header. */
4442 static const gdb_byte
*
4443 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4444 struct dwarf2_section_info
*section
,
4445 struct dwarf2_section_info
*abbrev_section
,
4446 const gdb_byte
*info_ptr
,
4447 ULONGEST
*signature
,
4448 cu_offset
*type_offset_in_tu
)
4450 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4451 bfd
*abfd
= get_section_bfd_owner (section
);
4453 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4455 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4457 /* If we're reading a type unit, skip over the signature and
4458 type_offset fields. */
4459 if (signature
!= NULL
)
4460 *signature
= read_8_bytes (abfd
, info_ptr
);
4462 if (type_offset_in_tu
!= NULL
)
4463 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4464 header
->offset_size
);
4465 info_ptr
+= header
->offset_size
;
4467 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4469 error_check_comp_unit_head (header
, section
, abbrev_section
);
4474 /* Fetch the abbreviation table offset from a comp or type unit header. */
4477 read_abbrev_offset (struct dwarf2_section_info
*section
,
4480 bfd
*abfd
= get_section_bfd_owner (section
);
4481 const gdb_byte
*info_ptr
;
4482 unsigned int length
, initial_length_size
, offset_size
;
4483 sect_offset abbrev_offset
;
4485 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4486 info_ptr
= section
->buffer
+ offset
.sect_off
;
4487 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4488 offset_size
= initial_length_size
== 4 ? 4 : 8;
4489 info_ptr
+= initial_length_size
+ 2 /*version*/;
4490 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4491 return abbrev_offset
;
4494 /* Allocate a new partial symtab for file named NAME and mark this new
4495 partial symtab as being an include of PST. */
4498 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4499 struct objfile
*objfile
)
4501 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4503 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4505 /* It shares objfile->objfile_obstack. */
4506 subpst
->dirname
= pst
->dirname
;
4509 subpst
->textlow
= 0;
4510 subpst
->texthigh
= 0;
4512 subpst
->dependencies
4513 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4514 subpst
->dependencies
[0] = pst
;
4515 subpst
->number_of_dependencies
= 1;
4517 subpst
->globals_offset
= 0;
4518 subpst
->n_global_syms
= 0;
4519 subpst
->statics_offset
= 0;
4520 subpst
->n_static_syms
= 0;
4521 subpst
->compunit_symtab
= NULL
;
4522 subpst
->read_symtab
= pst
->read_symtab
;
4525 /* No private part is necessary for include psymtabs. This property
4526 can be used to differentiate between such include psymtabs and
4527 the regular ones. */
4528 subpst
->read_symtab_private
= NULL
;
4531 /* Read the Line Number Program data and extract the list of files
4532 included by the source file represented by PST. Build an include
4533 partial symtab for each of these included files. */
4536 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4537 struct die_info
*die
,
4538 struct partial_symtab
*pst
)
4540 struct line_header
*lh
= NULL
;
4541 struct attribute
*attr
;
4543 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4545 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4547 return; /* No linetable, so no includes. */
4549 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4550 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4552 free_line_header (lh
);
4556 hash_signatured_type (const void *item
)
4558 const struct signatured_type
*sig_type
4559 = (const struct signatured_type
*) item
;
4561 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4562 return sig_type
->signature
;
4566 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4568 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4569 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4571 return lhs
->signature
== rhs
->signature
;
4574 /* Allocate a hash table for signatured types. */
4577 allocate_signatured_type_table (struct objfile
*objfile
)
4579 return htab_create_alloc_ex (41,
4580 hash_signatured_type
,
4583 &objfile
->objfile_obstack
,
4584 hashtab_obstack_allocate
,
4585 dummy_obstack_deallocate
);
4588 /* A helper function to add a signatured type CU to a table. */
4591 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4593 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4594 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4602 /* Create the hash table of all entries in the .debug_types
4603 (or .debug_types.dwo) section(s).
4604 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4605 otherwise it is NULL.
4607 The result is a pointer to the hash table or NULL if there are no types.
4609 Note: This function processes DWO files only, not DWP files. */
4612 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4613 VEC (dwarf2_section_info_def
) *types
)
4615 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4616 htab_t types_htab
= NULL
;
4618 struct dwarf2_section_info
*section
;
4619 struct dwarf2_section_info
*abbrev_section
;
4621 if (VEC_empty (dwarf2_section_info_def
, types
))
4624 abbrev_section
= (dwo_file
!= NULL
4625 ? &dwo_file
->sections
.abbrev
4626 : &dwarf2_per_objfile
->abbrev
);
4628 if (dwarf_read_debug
)
4629 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4630 dwo_file
? ".dwo" : "",
4631 get_section_file_name (abbrev_section
));
4634 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4638 const gdb_byte
*info_ptr
, *end_ptr
;
4640 dwarf2_read_section (objfile
, section
);
4641 info_ptr
= section
->buffer
;
4643 if (info_ptr
== NULL
)
4646 /* We can't set abfd until now because the section may be empty or
4647 not present, in which case the bfd is unknown. */
4648 abfd
= get_section_bfd_owner (section
);
4650 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4651 because we don't need to read any dies: the signature is in the
4654 end_ptr
= info_ptr
+ section
->size
;
4655 while (info_ptr
< end_ptr
)
4658 cu_offset type_offset_in_tu
;
4660 struct signatured_type
*sig_type
;
4661 struct dwo_unit
*dwo_tu
;
4663 const gdb_byte
*ptr
= info_ptr
;
4664 struct comp_unit_head header
;
4665 unsigned int length
;
4667 offset
.sect_off
= ptr
- section
->buffer
;
4669 /* We need to read the type's signature in order to build the hash
4670 table, but we don't need anything else just yet. */
4672 ptr
= read_and_check_type_unit_head (&header
, section
,
4673 abbrev_section
, ptr
,
4674 &signature
, &type_offset_in_tu
);
4676 length
= get_cu_length (&header
);
4678 /* Skip dummy type units. */
4679 if (ptr
>= info_ptr
+ length
4680 || peek_abbrev_code (abfd
, ptr
) == 0)
4686 if (types_htab
== NULL
)
4689 types_htab
= allocate_dwo_unit_table (objfile
);
4691 types_htab
= allocate_signatured_type_table (objfile
);
4697 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4699 dwo_tu
->dwo_file
= dwo_file
;
4700 dwo_tu
->signature
= signature
;
4701 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4702 dwo_tu
->section
= section
;
4703 dwo_tu
->offset
= offset
;
4704 dwo_tu
->length
= length
;
4708 /* N.B.: type_offset is not usable if this type uses a DWO file.
4709 The real type_offset is in the DWO file. */
4711 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4712 struct signatured_type
);
4713 sig_type
->signature
= signature
;
4714 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4715 sig_type
->per_cu
.objfile
= objfile
;
4716 sig_type
->per_cu
.is_debug_types
= 1;
4717 sig_type
->per_cu
.section
= section
;
4718 sig_type
->per_cu
.offset
= offset
;
4719 sig_type
->per_cu
.length
= length
;
4722 slot
= htab_find_slot (types_htab
,
4723 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4725 gdb_assert (slot
!= NULL
);
4728 sect_offset dup_offset
;
4732 const struct dwo_unit
*dup_tu
4733 = (const struct dwo_unit
*) *slot
;
4735 dup_offset
= dup_tu
->offset
;
4739 const struct signatured_type
*dup_tu
4740 = (const struct signatured_type
*) *slot
;
4742 dup_offset
= dup_tu
->per_cu
.offset
;
4745 complaint (&symfile_complaints
,
4746 _("debug type entry at offset 0x%x is duplicate to"
4747 " the entry at offset 0x%x, signature %s"),
4748 offset
.sect_off
, dup_offset
.sect_off
,
4749 hex_string (signature
));
4751 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4753 if (dwarf_read_debug
> 1)
4754 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4756 hex_string (signature
));
4765 /* Create the hash table of all entries in the .debug_types section,
4766 and initialize all_type_units.
4767 The result is zero if there is an error (e.g. missing .debug_types section),
4768 otherwise non-zero. */
4771 create_all_type_units (struct objfile
*objfile
)
4774 struct signatured_type
**iter
;
4776 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4777 if (types_htab
== NULL
)
4779 dwarf2_per_objfile
->signatured_types
= NULL
;
4783 dwarf2_per_objfile
->signatured_types
= types_htab
;
4785 dwarf2_per_objfile
->n_type_units
4786 = dwarf2_per_objfile
->n_allocated_type_units
4787 = htab_elements (types_htab
);
4788 dwarf2_per_objfile
->all_type_units
=
4789 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4790 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4791 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4792 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4793 == dwarf2_per_objfile
->n_type_units
);
4798 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4799 If SLOT is non-NULL, it is the entry to use in the hash table.
4800 Otherwise we find one. */
4802 static struct signatured_type
*
4803 add_type_unit (ULONGEST sig
, void **slot
)
4805 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4806 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4807 struct signatured_type
*sig_type
;
4809 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4811 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4813 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4814 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4815 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4816 dwarf2_per_objfile
->all_type_units
4817 = XRESIZEVEC (struct signatured_type
*,
4818 dwarf2_per_objfile
->all_type_units
,
4819 dwarf2_per_objfile
->n_allocated_type_units
);
4820 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4822 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4824 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4825 struct signatured_type
);
4826 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4827 sig_type
->signature
= sig
;
4828 sig_type
->per_cu
.is_debug_types
= 1;
4829 if (dwarf2_per_objfile
->using_index
)
4831 sig_type
->per_cu
.v
.quick
=
4832 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4833 struct dwarf2_per_cu_quick_data
);
4838 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4841 gdb_assert (*slot
== NULL
);
4843 /* The rest of sig_type must be filled in by the caller. */
4847 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4848 Fill in SIG_ENTRY with DWO_ENTRY. */
4851 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4852 struct signatured_type
*sig_entry
,
4853 struct dwo_unit
*dwo_entry
)
4855 /* Make sure we're not clobbering something we don't expect to. */
4856 gdb_assert (! sig_entry
->per_cu
.queued
);
4857 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4858 if (dwarf2_per_objfile
->using_index
)
4860 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4861 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4864 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4865 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4866 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4867 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4868 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4870 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4871 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4872 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4873 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4874 sig_entry
->per_cu
.objfile
= objfile
;
4875 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4876 sig_entry
->dwo_unit
= dwo_entry
;
4879 /* Subroutine of lookup_signatured_type.
4880 If we haven't read the TU yet, create the signatured_type data structure
4881 for a TU to be read in directly from a DWO file, bypassing the stub.
4882 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4883 using .gdb_index, then when reading a CU we want to stay in the DWO file
4884 containing that CU. Otherwise we could end up reading several other DWO
4885 files (due to comdat folding) to process the transitive closure of all the
4886 mentioned TUs, and that can be slow. The current DWO file will have every
4887 type signature that it needs.
4888 We only do this for .gdb_index because in the psymtab case we already have
4889 to read all the DWOs to build the type unit groups. */
4891 static struct signatured_type
*
4892 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4894 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4895 struct dwo_file
*dwo_file
;
4896 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4897 struct signatured_type find_sig_entry
, *sig_entry
;
4900 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4902 /* If TU skeletons have been removed then we may not have read in any
4904 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4906 dwarf2_per_objfile
->signatured_types
4907 = allocate_signatured_type_table (objfile
);
4910 /* We only ever need to read in one copy of a signatured type.
4911 Use the global signatured_types array to do our own comdat-folding
4912 of types. If this is the first time we're reading this TU, and
4913 the TU has an entry in .gdb_index, replace the recorded data from
4914 .gdb_index with this TU. */
4916 find_sig_entry
.signature
= sig
;
4917 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4918 &find_sig_entry
, INSERT
);
4919 sig_entry
= (struct signatured_type
*) *slot
;
4921 /* We can get here with the TU already read, *or* in the process of being
4922 read. Don't reassign the global entry to point to this DWO if that's
4923 the case. Also note that if the TU is already being read, it may not
4924 have come from a DWO, the program may be a mix of Fission-compiled
4925 code and non-Fission-compiled code. */
4927 /* Have we already tried to read this TU?
4928 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4929 needn't exist in the global table yet). */
4930 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4933 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4934 dwo_unit of the TU itself. */
4935 dwo_file
= cu
->dwo_unit
->dwo_file
;
4937 /* Ok, this is the first time we're reading this TU. */
4938 if (dwo_file
->tus
== NULL
)
4940 find_dwo_entry
.signature
= sig
;
4941 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4942 if (dwo_entry
== NULL
)
4945 /* If the global table doesn't have an entry for this TU, add one. */
4946 if (sig_entry
== NULL
)
4947 sig_entry
= add_type_unit (sig
, slot
);
4949 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4950 sig_entry
->per_cu
.tu_read
= 1;
4954 /* Subroutine of lookup_signatured_type.
4955 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4956 then try the DWP file. If the TU stub (skeleton) has been removed then
4957 it won't be in .gdb_index. */
4959 static struct signatured_type
*
4960 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4962 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4963 struct dwp_file
*dwp_file
= get_dwp_file ();
4964 struct dwo_unit
*dwo_entry
;
4965 struct signatured_type find_sig_entry
, *sig_entry
;
4968 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4969 gdb_assert (dwp_file
!= NULL
);
4971 /* If TU skeletons have been removed then we may not have read in any
4973 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4975 dwarf2_per_objfile
->signatured_types
4976 = allocate_signatured_type_table (objfile
);
4979 find_sig_entry
.signature
= sig
;
4980 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4981 &find_sig_entry
, INSERT
);
4982 sig_entry
= (struct signatured_type
*) *slot
;
4984 /* Have we already tried to read this TU?
4985 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4986 needn't exist in the global table yet). */
4987 if (sig_entry
!= NULL
)
4990 if (dwp_file
->tus
== NULL
)
4992 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4993 sig
, 1 /* is_debug_types */);
4994 if (dwo_entry
== NULL
)
4997 sig_entry
= add_type_unit (sig
, slot
);
4998 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5003 /* Lookup a signature based type for DW_FORM_ref_sig8.
5004 Returns NULL if signature SIG is not present in the table.
5005 It is up to the caller to complain about this. */
5007 static struct signatured_type
*
5008 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5011 && dwarf2_per_objfile
->using_index
)
5013 /* We're in a DWO/DWP file, and we're using .gdb_index.
5014 These cases require special processing. */
5015 if (get_dwp_file () == NULL
)
5016 return lookup_dwo_signatured_type (cu
, sig
);
5018 return lookup_dwp_signatured_type (cu
, sig
);
5022 struct signatured_type find_entry
, *entry
;
5024 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5026 find_entry
.signature
= sig
;
5027 entry
= ((struct signatured_type
*)
5028 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5033 /* Low level DIE reading support. */
5035 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5038 init_cu_die_reader (struct die_reader_specs
*reader
,
5039 struct dwarf2_cu
*cu
,
5040 struct dwarf2_section_info
*section
,
5041 struct dwo_file
*dwo_file
)
5043 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5044 reader
->abfd
= get_section_bfd_owner (section
);
5046 reader
->dwo_file
= dwo_file
;
5047 reader
->die_section
= section
;
5048 reader
->buffer
= section
->buffer
;
5049 reader
->buffer_end
= section
->buffer
+ section
->size
;
5050 reader
->comp_dir
= NULL
;
5053 /* Subroutine of init_cutu_and_read_dies to simplify it.
5054 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5055 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5058 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5059 from it to the DIE in the DWO. If NULL we are skipping the stub.
5060 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5061 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5062 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5063 STUB_COMP_DIR may be non-NULL.
5064 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5065 are filled in with the info of the DIE from the DWO file.
5066 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5067 provided an abbrev table to use.
5068 The result is non-zero if a valid (non-dummy) DIE was found. */
5071 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5072 struct dwo_unit
*dwo_unit
,
5073 int abbrev_table_provided
,
5074 struct die_info
*stub_comp_unit_die
,
5075 const char *stub_comp_dir
,
5076 struct die_reader_specs
*result_reader
,
5077 const gdb_byte
**result_info_ptr
,
5078 struct die_info
**result_comp_unit_die
,
5079 int *result_has_children
)
5081 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5082 struct dwarf2_cu
*cu
= this_cu
->cu
;
5083 struct dwarf2_section_info
*section
;
5085 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5086 ULONGEST signature
; /* Or dwo_id. */
5087 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5088 int i
,num_extra_attrs
;
5089 struct dwarf2_section_info
*dwo_abbrev_section
;
5090 struct attribute
*attr
;
5091 struct die_info
*comp_unit_die
;
5093 /* At most one of these may be provided. */
5094 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5096 /* These attributes aren't processed until later:
5097 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5098 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5099 referenced later. However, these attributes are found in the stub
5100 which we won't have later. In order to not impose this complication
5101 on the rest of the code, we read them here and copy them to the
5110 if (stub_comp_unit_die
!= NULL
)
5112 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5114 if (! this_cu
->is_debug_types
)
5115 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5116 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5117 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5118 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5119 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5121 /* There should be a DW_AT_addr_base attribute here (if needed).
5122 We need the value before we can process DW_FORM_GNU_addr_index. */
5124 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5126 cu
->addr_base
= DW_UNSND (attr
);
5128 /* There should be a DW_AT_ranges_base attribute here (if needed).
5129 We need the value before we can process DW_AT_ranges. */
5130 cu
->ranges_base
= 0;
5131 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5133 cu
->ranges_base
= DW_UNSND (attr
);
5135 else if (stub_comp_dir
!= NULL
)
5137 /* Reconstruct the comp_dir attribute to simplify the code below. */
5138 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5139 comp_dir
->name
= DW_AT_comp_dir
;
5140 comp_dir
->form
= DW_FORM_string
;
5141 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5142 DW_STRING (comp_dir
) = stub_comp_dir
;
5145 /* Set up for reading the DWO CU/TU. */
5146 cu
->dwo_unit
= dwo_unit
;
5147 section
= dwo_unit
->section
;
5148 dwarf2_read_section (objfile
, section
);
5149 abfd
= get_section_bfd_owner (section
);
5150 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5151 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5152 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5154 if (this_cu
->is_debug_types
)
5156 ULONGEST header_signature
;
5157 cu_offset type_offset_in_tu
;
5158 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5160 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5164 &type_offset_in_tu
);
5165 /* This is not an assert because it can be caused by bad debug info. */
5166 if (sig_type
->signature
!= header_signature
)
5168 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5169 " TU at offset 0x%x [in module %s]"),
5170 hex_string (sig_type
->signature
),
5171 hex_string (header_signature
),
5172 dwo_unit
->offset
.sect_off
,
5173 bfd_get_filename (abfd
));
5175 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5176 /* For DWOs coming from DWP files, we don't know the CU length
5177 nor the type's offset in the TU until now. */
5178 dwo_unit
->length
= get_cu_length (&cu
->header
);
5179 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5181 /* Establish the type offset that can be used to lookup the type.
5182 For DWO files, we don't know it until now. */
5183 sig_type
->type_offset_in_section
.sect_off
=
5184 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5188 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5191 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5192 /* For DWOs coming from DWP files, we don't know the CU length
5194 dwo_unit
->length
= get_cu_length (&cu
->header
);
5197 /* Replace the CU's original abbrev table with the DWO's.
5198 Reminder: We can't read the abbrev table until we've read the header. */
5199 if (abbrev_table_provided
)
5201 /* Don't free the provided abbrev table, the caller of
5202 init_cutu_and_read_dies owns it. */
5203 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5204 /* Ensure the DWO abbrev table gets freed. */
5205 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5209 dwarf2_free_abbrev_table (cu
);
5210 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5211 /* Leave any existing abbrev table cleanup as is. */
5214 /* Read in the die, but leave space to copy over the attributes
5215 from the stub. This has the benefit of simplifying the rest of
5216 the code - all the work to maintain the illusion of a single
5217 DW_TAG_{compile,type}_unit DIE is done here. */
5218 num_extra_attrs
= ((stmt_list
!= NULL
)
5222 + (comp_dir
!= NULL
));
5223 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5224 result_has_children
, num_extra_attrs
);
5226 /* Copy over the attributes from the stub to the DIE we just read in. */
5227 comp_unit_die
= *result_comp_unit_die
;
5228 i
= comp_unit_die
->num_attrs
;
5229 if (stmt_list
!= NULL
)
5230 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5232 comp_unit_die
->attrs
[i
++] = *low_pc
;
5233 if (high_pc
!= NULL
)
5234 comp_unit_die
->attrs
[i
++] = *high_pc
;
5236 comp_unit_die
->attrs
[i
++] = *ranges
;
5237 if (comp_dir
!= NULL
)
5238 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5239 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5241 if (dwarf_die_debug
)
5243 fprintf_unfiltered (gdb_stdlog
,
5244 "Read die from %s@0x%x of %s:\n",
5245 get_section_name (section
),
5246 (unsigned) (begin_info_ptr
- section
->buffer
),
5247 bfd_get_filename (abfd
));
5248 dump_die (comp_unit_die
, dwarf_die_debug
);
5251 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5252 TUs by skipping the stub and going directly to the entry in the DWO file.
5253 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5254 to get it via circuitous means. Blech. */
5255 if (comp_dir
!= NULL
)
5256 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5258 /* Skip dummy compilation units. */
5259 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5260 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5263 *result_info_ptr
= info_ptr
;
5267 /* Subroutine of init_cutu_and_read_dies to simplify it.
5268 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5269 Returns NULL if the specified DWO unit cannot be found. */
5271 static struct dwo_unit
*
5272 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5273 struct die_info
*comp_unit_die
)
5275 struct dwarf2_cu
*cu
= this_cu
->cu
;
5276 struct attribute
*attr
;
5278 struct dwo_unit
*dwo_unit
;
5279 const char *comp_dir
, *dwo_name
;
5281 gdb_assert (cu
!= NULL
);
5283 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5284 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5285 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5287 if (this_cu
->is_debug_types
)
5289 struct signatured_type
*sig_type
;
5291 /* Since this_cu is the first member of struct signatured_type,
5292 we can go from a pointer to one to a pointer to the other. */
5293 sig_type
= (struct signatured_type
*) this_cu
;
5294 signature
= sig_type
->signature
;
5295 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5299 struct attribute
*attr
;
5301 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5303 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5305 dwo_name
, objfile_name (this_cu
->objfile
));
5306 signature
= DW_UNSND (attr
);
5307 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5314 /* Subroutine of init_cutu_and_read_dies to simplify it.
5315 See it for a description of the parameters.
5316 Read a TU directly from a DWO file, bypassing the stub.
5318 Note: This function could be a little bit simpler if we shared cleanups
5319 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5320 to do, so we keep this function self-contained. Or we could move this
5321 into our caller, but it's complex enough already. */
5324 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5325 int use_existing_cu
, int keep
,
5326 die_reader_func_ftype
*die_reader_func
,
5329 struct dwarf2_cu
*cu
;
5330 struct signatured_type
*sig_type
;
5331 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5332 struct die_reader_specs reader
;
5333 const gdb_byte
*info_ptr
;
5334 struct die_info
*comp_unit_die
;
5337 /* Verify we can do the following downcast, and that we have the
5339 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5340 sig_type
= (struct signatured_type
*) this_cu
;
5341 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5343 cleanups
= make_cleanup (null_cleanup
, NULL
);
5345 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5347 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5349 /* There's no need to do the rereading_dwo_cu handling that
5350 init_cutu_and_read_dies does since we don't read the stub. */
5354 /* If !use_existing_cu, this_cu->cu must be NULL. */
5355 gdb_assert (this_cu
->cu
== NULL
);
5356 cu
= XNEW (struct dwarf2_cu
);
5357 init_one_comp_unit (cu
, this_cu
);
5358 /* If an error occurs while loading, release our storage. */
5359 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5362 /* A future optimization, if needed, would be to use an existing
5363 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5364 could share abbrev tables. */
5366 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5367 0 /* abbrev_table_provided */,
5368 NULL
/* stub_comp_unit_die */,
5369 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5371 &comp_unit_die
, &has_children
) == 0)
5374 do_cleanups (cleanups
);
5378 /* All the "real" work is done here. */
5379 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5381 /* This duplicates the code in init_cutu_and_read_dies,
5382 but the alternative is making the latter more complex.
5383 This function is only for the special case of using DWO files directly:
5384 no point in overly complicating the general case just to handle this. */
5385 if (free_cu_cleanup
!= NULL
)
5389 /* We've successfully allocated this compilation unit. Let our
5390 caller clean it up when finished with it. */
5391 discard_cleanups (free_cu_cleanup
);
5393 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5394 So we have to manually free the abbrev table. */
5395 dwarf2_free_abbrev_table (cu
);
5397 /* Link this CU into read_in_chain. */
5398 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5399 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5402 do_cleanups (free_cu_cleanup
);
5405 do_cleanups (cleanups
);
5408 /* Initialize a CU (or TU) and read its DIEs.
5409 If the CU defers to a DWO file, read the DWO file as well.
5411 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5412 Otherwise the table specified in the comp unit header is read in and used.
5413 This is an optimization for when we already have the abbrev table.
5415 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5416 Otherwise, a new CU is allocated with xmalloc.
5418 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5419 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5421 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5422 linker) then DIE_READER_FUNC will not get called. */
5425 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5426 struct abbrev_table
*abbrev_table
,
5427 int use_existing_cu
, int keep
,
5428 die_reader_func_ftype
*die_reader_func
,
5431 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5432 struct dwarf2_section_info
*section
= this_cu
->section
;
5433 bfd
*abfd
= get_section_bfd_owner (section
);
5434 struct dwarf2_cu
*cu
;
5435 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5436 struct die_reader_specs reader
;
5437 struct die_info
*comp_unit_die
;
5439 struct attribute
*attr
;
5440 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5441 struct signatured_type
*sig_type
= NULL
;
5442 struct dwarf2_section_info
*abbrev_section
;
5443 /* Non-zero if CU currently points to a DWO file and we need to
5444 reread it. When this happens we need to reread the skeleton die
5445 before we can reread the DWO file (this only applies to CUs, not TUs). */
5446 int rereading_dwo_cu
= 0;
5448 if (dwarf_die_debug
)
5449 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5450 this_cu
->is_debug_types
? "type" : "comp",
5451 this_cu
->offset
.sect_off
);
5453 if (use_existing_cu
)
5456 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5457 file (instead of going through the stub), short-circuit all of this. */
5458 if (this_cu
->reading_dwo_directly
)
5460 /* Narrow down the scope of possibilities to have to understand. */
5461 gdb_assert (this_cu
->is_debug_types
);
5462 gdb_assert (abbrev_table
== NULL
);
5463 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5464 die_reader_func
, data
);
5468 cleanups
= make_cleanup (null_cleanup
, NULL
);
5470 /* This is cheap if the section is already read in. */
5471 dwarf2_read_section (objfile
, section
);
5473 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5475 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5477 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5480 /* If this CU is from a DWO file we need to start over, we need to
5481 refetch the attributes from the skeleton CU.
5482 This could be optimized by retrieving those attributes from when we
5483 were here the first time: the previous comp_unit_die was stored in
5484 comp_unit_obstack. But there's no data yet that we need this
5486 if (cu
->dwo_unit
!= NULL
)
5487 rereading_dwo_cu
= 1;
5491 /* If !use_existing_cu, this_cu->cu must be NULL. */
5492 gdb_assert (this_cu
->cu
== NULL
);
5493 cu
= XNEW (struct dwarf2_cu
);
5494 init_one_comp_unit (cu
, this_cu
);
5495 /* If an error occurs while loading, release our storage. */
5496 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5499 /* Get the header. */
5500 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5502 /* We already have the header, there's no need to read it in again. */
5503 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5507 if (this_cu
->is_debug_types
)
5510 cu_offset type_offset_in_tu
;
5512 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5513 abbrev_section
, info_ptr
,
5515 &type_offset_in_tu
);
5517 /* Since per_cu is the first member of struct signatured_type,
5518 we can go from a pointer to one to a pointer to the other. */
5519 sig_type
= (struct signatured_type
*) this_cu
;
5520 gdb_assert (sig_type
->signature
== signature
);
5521 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5522 == type_offset_in_tu
.cu_off
);
5523 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5525 /* LENGTH has not been set yet for type units if we're
5526 using .gdb_index. */
5527 this_cu
->length
= get_cu_length (&cu
->header
);
5529 /* Establish the type offset that can be used to lookup the type. */
5530 sig_type
->type_offset_in_section
.sect_off
=
5531 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5535 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5539 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5540 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5544 /* Skip dummy compilation units. */
5545 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5546 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5548 do_cleanups (cleanups
);
5552 /* If we don't have them yet, read the abbrevs for this compilation unit.
5553 And if we need to read them now, make sure they're freed when we're
5554 done. Note that it's important that if the CU had an abbrev table
5555 on entry we don't free it when we're done: Somewhere up the call stack
5556 it may be in use. */
5557 if (abbrev_table
!= NULL
)
5559 gdb_assert (cu
->abbrev_table
== NULL
);
5560 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5561 == abbrev_table
->offset
.sect_off
);
5562 cu
->abbrev_table
= abbrev_table
;
5564 else if (cu
->abbrev_table
== NULL
)
5566 dwarf2_read_abbrevs (cu
, abbrev_section
);
5567 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5569 else if (rereading_dwo_cu
)
5571 dwarf2_free_abbrev_table (cu
);
5572 dwarf2_read_abbrevs (cu
, abbrev_section
);
5575 /* Read the top level CU/TU die. */
5576 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5577 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5579 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5581 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5582 DWO CU, that this test will fail (the attribute will not be present). */
5583 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5586 struct dwo_unit
*dwo_unit
;
5587 struct die_info
*dwo_comp_unit_die
;
5591 complaint (&symfile_complaints
,
5592 _("compilation unit with DW_AT_GNU_dwo_name"
5593 " has children (offset 0x%x) [in module %s]"),
5594 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5596 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5597 if (dwo_unit
!= NULL
)
5599 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5600 abbrev_table
!= NULL
,
5601 comp_unit_die
, NULL
,
5603 &dwo_comp_unit_die
, &has_children
) == 0)
5606 do_cleanups (cleanups
);
5609 comp_unit_die
= dwo_comp_unit_die
;
5613 /* Yikes, we couldn't find the rest of the DIE, we only have
5614 the stub. A complaint has already been logged. There's
5615 not much more we can do except pass on the stub DIE to
5616 die_reader_func. We don't want to throw an error on bad
5621 /* All of the above is setup for this call. Yikes. */
5622 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5624 /* Done, clean up. */
5625 if (free_cu_cleanup
!= NULL
)
5629 /* We've successfully allocated this compilation unit. Let our
5630 caller clean it up when finished with it. */
5631 discard_cleanups (free_cu_cleanup
);
5633 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5634 So we have to manually free the abbrev table. */
5635 dwarf2_free_abbrev_table (cu
);
5637 /* Link this CU into read_in_chain. */
5638 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5639 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5642 do_cleanups (free_cu_cleanup
);
5645 do_cleanups (cleanups
);
5648 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5649 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5650 to have already done the lookup to find the DWO file).
5652 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5653 THIS_CU->is_debug_types, but nothing else.
5655 We fill in THIS_CU->length.
5657 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5658 linker) then DIE_READER_FUNC will not get called.
5660 THIS_CU->cu is always freed when done.
5661 This is done in order to not leave THIS_CU->cu in a state where we have
5662 to care whether it refers to the "main" CU or the DWO CU. */
5665 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5666 struct dwo_file
*dwo_file
,
5667 die_reader_func_ftype
*die_reader_func
,
5670 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5671 struct dwarf2_section_info
*section
= this_cu
->section
;
5672 bfd
*abfd
= get_section_bfd_owner (section
);
5673 struct dwarf2_section_info
*abbrev_section
;
5674 struct dwarf2_cu cu
;
5675 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5676 struct die_reader_specs reader
;
5677 struct cleanup
*cleanups
;
5678 struct die_info
*comp_unit_die
;
5681 if (dwarf_die_debug
)
5682 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5683 this_cu
->is_debug_types
? "type" : "comp",
5684 this_cu
->offset
.sect_off
);
5686 gdb_assert (this_cu
->cu
== NULL
);
5688 abbrev_section
= (dwo_file
!= NULL
5689 ? &dwo_file
->sections
.abbrev
5690 : get_abbrev_section_for_cu (this_cu
));
5692 /* This is cheap if the section is already read in. */
5693 dwarf2_read_section (objfile
, section
);
5695 init_one_comp_unit (&cu
, this_cu
);
5697 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5699 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5700 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5701 abbrev_section
, info_ptr
,
5702 this_cu
->is_debug_types
);
5704 this_cu
->length
= get_cu_length (&cu
.header
);
5706 /* Skip dummy compilation units. */
5707 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5708 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5710 do_cleanups (cleanups
);
5714 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5715 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5717 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5718 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5720 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5722 do_cleanups (cleanups
);
5725 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5726 does not lookup the specified DWO file.
5727 This cannot be used to read DWO files.
5729 THIS_CU->cu is always freed when done.
5730 This is done in order to not leave THIS_CU->cu in a state where we have
5731 to care whether it refers to the "main" CU or the DWO CU.
5732 We can revisit this if the data shows there's a performance issue. */
5735 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5736 die_reader_func_ftype
*die_reader_func
,
5739 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5742 /* Type Unit Groups.
5744 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5745 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5746 so that all types coming from the same compilation (.o file) are grouped
5747 together. A future step could be to put the types in the same symtab as
5748 the CU the types ultimately came from. */
5751 hash_type_unit_group (const void *item
)
5753 const struct type_unit_group
*tu_group
5754 = (const struct type_unit_group
*) item
;
5756 return hash_stmt_list_entry (&tu_group
->hash
);
5760 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5762 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5763 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5765 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5768 /* Allocate a hash table for type unit groups. */
5771 allocate_type_unit_groups_table (void)
5773 return htab_create_alloc_ex (3,
5774 hash_type_unit_group
,
5777 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5778 hashtab_obstack_allocate
,
5779 dummy_obstack_deallocate
);
5782 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5783 partial symtabs. We combine several TUs per psymtab to not let the size
5784 of any one psymtab grow too big. */
5785 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5786 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5788 /* Helper routine for get_type_unit_group.
5789 Create the type_unit_group object used to hold one or more TUs. */
5791 static struct type_unit_group
*
5792 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5794 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5795 struct dwarf2_per_cu_data
*per_cu
;
5796 struct type_unit_group
*tu_group
;
5798 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5799 struct type_unit_group
);
5800 per_cu
= &tu_group
->per_cu
;
5801 per_cu
->objfile
= objfile
;
5803 if (dwarf2_per_objfile
->using_index
)
5805 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5806 struct dwarf2_per_cu_quick_data
);
5810 unsigned int line_offset
= line_offset_struct
.sect_off
;
5811 struct partial_symtab
*pst
;
5814 /* Give the symtab a useful name for debug purposes. */
5815 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5816 name
= xstrprintf ("<type_units_%d>",
5817 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5819 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5821 pst
= create_partial_symtab (per_cu
, name
);
5827 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5828 tu_group
->hash
.line_offset
= line_offset_struct
;
5833 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5834 STMT_LIST is a DW_AT_stmt_list attribute. */
5836 static struct type_unit_group
*
5837 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5839 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5840 struct type_unit_group
*tu_group
;
5842 unsigned int line_offset
;
5843 struct type_unit_group type_unit_group_for_lookup
;
5845 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5847 dwarf2_per_objfile
->type_unit_groups
=
5848 allocate_type_unit_groups_table ();
5851 /* Do we need to create a new group, or can we use an existing one? */
5855 line_offset
= DW_UNSND (stmt_list
);
5856 ++tu_stats
->nr_symtab_sharers
;
5860 /* Ugh, no stmt_list. Rare, but we have to handle it.
5861 We can do various things here like create one group per TU or
5862 spread them over multiple groups to split up the expansion work.
5863 To avoid worst case scenarios (too many groups or too large groups)
5864 we, umm, group them in bunches. */
5865 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5866 | (tu_stats
->nr_stmt_less_type_units
5867 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5868 ++tu_stats
->nr_stmt_less_type_units
;
5871 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5872 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5873 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5874 &type_unit_group_for_lookup
, INSERT
);
5877 tu_group
= (struct type_unit_group
*) *slot
;
5878 gdb_assert (tu_group
!= NULL
);
5882 sect_offset line_offset_struct
;
5884 line_offset_struct
.sect_off
= line_offset
;
5885 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5887 ++tu_stats
->nr_symtabs
;
5893 /* Partial symbol tables. */
5895 /* Create a psymtab named NAME and assign it to PER_CU.
5897 The caller must fill in the following details:
5898 dirname, textlow, texthigh. */
5900 static struct partial_symtab
*
5901 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5903 struct objfile
*objfile
= per_cu
->objfile
;
5904 struct partial_symtab
*pst
;
5906 pst
= start_psymtab_common (objfile
, name
, 0,
5907 objfile
->global_psymbols
.next
,
5908 objfile
->static_psymbols
.next
);
5910 pst
->psymtabs_addrmap_supported
= 1;
5912 /* This is the glue that links PST into GDB's symbol API. */
5913 pst
->read_symtab_private
= per_cu
;
5914 pst
->read_symtab
= dwarf2_read_symtab
;
5915 per_cu
->v
.psymtab
= pst
;
5920 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5923 struct process_psymtab_comp_unit_data
5925 /* True if we are reading a DW_TAG_partial_unit. */
5927 int want_partial_unit
;
5929 /* The "pretend" language that is used if the CU doesn't declare a
5932 enum language pretend_language
;
5935 /* die_reader_func for process_psymtab_comp_unit. */
5938 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5939 const gdb_byte
*info_ptr
,
5940 struct die_info
*comp_unit_die
,
5944 struct dwarf2_cu
*cu
= reader
->cu
;
5945 struct objfile
*objfile
= cu
->objfile
;
5946 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5947 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5949 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5950 struct partial_symtab
*pst
;
5952 const char *filename
;
5953 struct process_psymtab_comp_unit_data
*info
5954 = (struct process_psymtab_comp_unit_data
*) data
;
5956 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5959 gdb_assert (! per_cu
->is_debug_types
);
5961 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5963 cu
->list_in_scope
= &file_symbols
;
5965 /* Allocate a new partial symbol table structure. */
5966 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5967 if (filename
== NULL
)
5970 pst
= create_partial_symtab (per_cu
, filename
);
5972 /* This must be done before calling dwarf2_build_include_psymtabs. */
5973 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5975 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5977 dwarf2_find_base_address (comp_unit_die
, cu
);
5979 /* Possibly set the default values of LOWPC and HIGHPC from
5981 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5982 &best_highpc
, cu
, pst
);
5983 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5984 /* Store the contiguous range if it is not empty; it can be empty for
5985 CUs with no code. */
5986 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5987 gdbarch_adjust_dwarf2_addr (gdbarch
,
5988 best_lowpc
+ baseaddr
),
5989 gdbarch_adjust_dwarf2_addr (gdbarch
,
5990 best_highpc
+ baseaddr
) - 1,
5993 /* Check if comp unit has_children.
5994 If so, read the rest of the partial symbols from this comp unit.
5995 If not, there's no more debug_info for this comp unit. */
5998 struct partial_die_info
*first_die
;
5999 CORE_ADDR lowpc
, highpc
;
6001 lowpc
= ((CORE_ADDR
) -1);
6002 highpc
= ((CORE_ADDR
) 0);
6004 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6006 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6009 /* If we didn't find a lowpc, set it to highpc to avoid
6010 complaints from `maint check'. */
6011 if (lowpc
== ((CORE_ADDR
) -1))
6014 /* If the compilation unit didn't have an explicit address range,
6015 then use the information extracted from its child dies. */
6019 best_highpc
= highpc
;
6022 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6023 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6025 end_psymtab_common (objfile
, pst
);
6027 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6030 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6031 struct dwarf2_per_cu_data
*iter
;
6033 /* Fill in 'dependencies' here; we fill in 'users' in a
6035 pst
->number_of_dependencies
= len
;
6037 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6039 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6042 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6044 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6047 /* Get the list of files included in the current compilation unit,
6048 and build a psymtab for each of them. */
6049 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6051 if (dwarf_read_debug
)
6053 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6055 fprintf_unfiltered (gdb_stdlog
,
6056 "Psymtab for %s unit @0x%x: %s - %s"
6057 ", %d global, %d static syms\n",
6058 per_cu
->is_debug_types
? "type" : "comp",
6059 per_cu
->offset
.sect_off
,
6060 paddress (gdbarch
, pst
->textlow
),
6061 paddress (gdbarch
, pst
->texthigh
),
6062 pst
->n_global_syms
, pst
->n_static_syms
);
6066 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6067 Process compilation unit THIS_CU for a psymtab. */
6070 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6071 int want_partial_unit
,
6072 enum language pretend_language
)
6074 struct process_psymtab_comp_unit_data info
;
6076 /* If this compilation unit was already read in, free the
6077 cached copy in order to read it in again. This is
6078 necessary because we skipped some symbols when we first
6079 read in the compilation unit (see load_partial_dies).
6080 This problem could be avoided, but the benefit is unclear. */
6081 if (this_cu
->cu
!= NULL
)
6082 free_one_cached_comp_unit (this_cu
);
6084 gdb_assert (! this_cu
->is_debug_types
);
6085 info
.want_partial_unit
= want_partial_unit
;
6086 info
.pretend_language
= pretend_language
;
6087 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6088 process_psymtab_comp_unit_reader
,
6091 /* Age out any secondary CUs. */
6092 age_cached_comp_units ();
6095 /* Reader function for build_type_psymtabs. */
6098 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6099 const gdb_byte
*info_ptr
,
6100 struct die_info
*type_unit_die
,
6104 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6105 struct dwarf2_cu
*cu
= reader
->cu
;
6106 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6107 struct signatured_type
*sig_type
;
6108 struct type_unit_group
*tu_group
;
6109 struct attribute
*attr
;
6110 struct partial_die_info
*first_die
;
6111 CORE_ADDR lowpc
, highpc
;
6112 struct partial_symtab
*pst
;
6114 gdb_assert (data
== NULL
);
6115 gdb_assert (per_cu
->is_debug_types
);
6116 sig_type
= (struct signatured_type
*) per_cu
;
6121 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6122 tu_group
= get_type_unit_group (cu
, attr
);
6124 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6126 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6127 cu
->list_in_scope
= &file_symbols
;
6128 pst
= create_partial_symtab (per_cu
, "");
6131 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6133 lowpc
= (CORE_ADDR
) -1;
6134 highpc
= (CORE_ADDR
) 0;
6135 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6137 end_psymtab_common (objfile
, pst
);
6140 /* Struct used to sort TUs by their abbreviation table offset. */
6142 struct tu_abbrev_offset
6144 struct signatured_type
*sig_type
;
6145 sect_offset abbrev_offset
;
6148 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6151 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6153 const struct tu_abbrev_offset
* const *a
6154 = (const struct tu_abbrev_offset
* const*) ap
;
6155 const struct tu_abbrev_offset
* const *b
6156 = (const struct tu_abbrev_offset
* const*) bp
;
6157 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6158 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6160 return (aoff
> boff
) - (aoff
< boff
);
6163 /* Efficiently read all the type units.
6164 This does the bulk of the work for build_type_psymtabs.
6166 The efficiency is because we sort TUs by the abbrev table they use and
6167 only read each abbrev table once. In one program there are 200K TUs
6168 sharing 8K abbrev tables.
6170 The main purpose of this function is to support building the
6171 dwarf2_per_objfile->type_unit_groups table.
6172 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6173 can collapse the search space by grouping them by stmt_list.
6174 The savings can be significant, in the same program from above the 200K TUs
6175 share 8K stmt_list tables.
6177 FUNC is expected to call get_type_unit_group, which will create the
6178 struct type_unit_group if necessary and add it to
6179 dwarf2_per_objfile->type_unit_groups. */
6182 build_type_psymtabs_1 (void)
6184 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6185 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6186 struct cleanup
*cleanups
;
6187 struct abbrev_table
*abbrev_table
;
6188 sect_offset abbrev_offset
;
6189 struct tu_abbrev_offset
*sorted_by_abbrev
;
6190 struct type_unit_group
**iter
;
6193 /* It's up to the caller to not call us multiple times. */
6194 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6196 if (dwarf2_per_objfile
->n_type_units
== 0)
6199 /* TUs typically share abbrev tables, and there can be way more TUs than
6200 abbrev tables. Sort by abbrev table to reduce the number of times we
6201 read each abbrev table in.
6202 Alternatives are to punt or to maintain a cache of abbrev tables.
6203 This is simpler and efficient enough for now.
6205 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6206 symtab to use). Typically TUs with the same abbrev offset have the same
6207 stmt_list value too so in practice this should work well.
6209 The basic algorithm here is:
6211 sort TUs by abbrev table
6212 for each TU with same abbrev table:
6213 read abbrev table if first user
6214 read TU top level DIE
6215 [IWBN if DWO skeletons had DW_AT_stmt_list]
6218 if (dwarf_read_debug
)
6219 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6221 /* Sort in a separate table to maintain the order of all_type_units
6222 for .gdb_index: TU indices directly index all_type_units. */
6223 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6224 dwarf2_per_objfile
->n_type_units
);
6225 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6227 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6229 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6230 sorted_by_abbrev
[i
].abbrev_offset
=
6231 read_abbrev_offset (sig_type
->per_cu
.section
,
6232 sig_type
->per_cu
.offset
);
6234 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6235 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6236 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6238 abbrev_offset
.sect_off
= ~(unsigned) 0;
6239 abbrev_table
= NULL
;
6240 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6242 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6244 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6246 /* Switch to the next abbrev table if necessary. */
6247 if (abbrev_table
== NULL
6248 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6250 if (abbrev_table
!= NULL
)
6252 abbrev_table_free (abbrev_table
);
6253 /* Reset to NULL in case abbrev_table_read_table throws
6254 an error: abbrev_table_free_cleanup will get called. */
6255 abbrev_table
= NULL
;
6257 abbrev_offset
= tu
->abbrev_offset
;
6259 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6261 ++tu_stats
->nr_uniq_abbrev_tables
;
6264 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6265 build_type_psymtabs_reader
, NULL
);
6268 do_cleanups (cleanups
);
6271 /* Print collected type unit statistics. */
6274 print_tu_stats (void)
6276 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6278 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6279 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6280 dwarf2_per_objfile
->n_type_units
);
6281 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6282 tu_stats
->nr_uniq_abbrev_tables
);
6283 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6284 tu_stats
->nr_symtabs
);
6285 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6286 tu_stats
->nr_symtab_sharers
);
6287 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6288 tu_stats
->nr_stmt_less_type_units
);
6289 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6290 tu_stats
->nr_all_type_units_reallocs
);
6293 /* Traversal function for build_type_psymtabs. */
6296 build_type_psymtab_dependencies (void **slot
, void *info
)
6298 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6299 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6300 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6301 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6302 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6303 struct signatured_type
*iter
;
6306 gdb_assert (len
> 0);
6307 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6309 pst
->number_of_dependencies
= len
;
6311 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6313 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6316 gdb_assert (iter
->per_cu
.is_debug_types
);
6317 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6318 iter
->type_unit_group
= tu_group
;
6321 VEC_free (sig_type_ptr
, tu_group
->tus
);
6326 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6327 Build partial symbol tables for the .debug_types comp-units. */
6330 build_type_psymtabs (struct objfile
*objfile
)
6332 if (! create_all_type_units (objfile
))
6335 build_type_psymtabs_1 ();
6338 /* Traversal function for process_skeletonless_type_unit.
6339 Read a TU in a DWO file and build partial symbols for it. */
6342 process_skeletonless_type_unit (void **slot
, void *info
)
6344 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6345 struct objfile
*objfile
= (struct objfile
*) info
;
6346 struct signatured_type find_entry
, *entry
;
6348 /* If this TU doesn't exist in the global table, add it and read it in. */
6350 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6352 dwarf2_per_objfile
->signatured_types
6353 = allocate_signatured_type_table (objfile
);
6356 find_entry
.signature
= dwo_unit
->signature
;
6357 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6359 /* If we've already seen this type there's nothing to do. What's happening
6360 is we're doing our own version of comdat-folding here. */
6364 /* This does the job that create_all_type_units would have done for
6366 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6367 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6370 /* This does the job that build_type_psymtabs_1 would have done. */
6371 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6372 build_type_psymtabs_reader
, NULL
);
6377 /* Traversal function for process_skeletonless_type_units. */
6380 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6382 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6384 if (dwo_file
->tus
!= NULL
)
6386 htab_traverse_noresize (dwo_file
->tus
,
6387 process_skeletonless_type_unit
, info
);
6393 /* Scan all TUs of DWO files, verifying we've processed them.
6394 This is needed in case a TU was emitted without its skeleton.
6395 Note: This can't be done until we know what all the DWO files are. */
6398 process_skeletonless_type_units (struct objfile
*objfile
)
6400 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6401 if (get_dwp_file () == NULL
6402 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6404 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6405 process_dwo_file_for_skeletonless_type_units
,
6410 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6413 psymtabs_addrmap_cleanup (void *o
)
6415 struct objfile
*objfile
= (struct objfile
*) o
;
6417 objfile
->psymtabs_addrmap
= NULL
;
6420 /* Compute the 'user' field for each psymtab in OBJFILE. */
6423 set_partial_user (struct objfile
*objfile
)
6427 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6429 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6430 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6436 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6438 /* Set the 'user' field only if it is not already set. */
6439 if (pst
->dependencies
[j
]->user
== NULL
)
6440 pst
->dependencies
[j
]->user
= pst
;
6445 /* Build the partial symbol table by doing a quick pass through the
6446 .debug_info and .debug_abbrev sections. */
6449 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6451 struct cleanup
*back_to
, *addrmap_cleanup
;
6452 struct obstack temp_obstack
;
6455 if (dwarf_read_debug
)
6457 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6458 objfile_name (objfile
));
6461 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6463 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6465 /* Any cached compilation units will be linked by the per-objfile
6466 read_in_chain. Make sure to free them when we're done. */
6467 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6469 build_type_psymtabs (objfile
);
6471 create_all_comp_units (objfile
);
6473 /* Create a temporary address map on a temporary obstack. We later
6474 copy this to the final obstack. */
6475 obstack_init (&temp_obstack
);
6476 make_cleanup_obstack_free (&temp_obstack
);
6477 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6478 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6480 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6482 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6484 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6487 /* This has to wait until we read the CUs, we need the list of DWOs. */
6488 process_skeletonless_type_units (objfile
);
6490 /* Now that all TUs have been processed we can fill in the dependencies. */
6491 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6493 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6494 build_type_psymtab_dependencies
, NULL
);
6497 if (dwarf_read_debug
)
6500 set_partial_user (objfile
);
6502 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6503 &objfile
->objfile_obstack
);
6504 discard_cleanups (addrmap_cleanup
);
6506 do_cleanups (back_to
);
6508 if (dwarf_read_debug
)
6509 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6510 objfile_name (objfile
));
6513 /* die_reader_func for load_partial_comp_unit. */
6516 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6517 const gdb_byte
*info_ptr
,
6518 struct die_info
*comp_unit_die
,
6522 struct dwarf2_cu
*cu
= reader
->cu
;
6524 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6526 /* Check if comp unit has_children.
6527 If so, read the rest of the partial symbols from this comp unit.
6528 If not, there's no more debug_info for this comp unit. */
6530 load_partial_dies (reader
, info_ptr
, 0);
6533 /* Load the partial DIEs for a secondary CU into memory.
6534 This is also used when rereading a primary CU with load_all_dies. */
6537 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6539 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6540 load_partial_comp_unit_reader
, NULL
);
6544 read_comp_units_from_section (struct objfile
*objfile
,
6545 struct dwarf2_section_info
*section
,
6546 unsigned int is_dwz
,
6549 struct dwarf2_per_cu_data
***all_comp_units
)
6551 const gdb_byte
*info_ptr
;
6552 bfd
*abfd
= get_section_bfd_owner (section
);
6554 if (dwarf_read_debug
)
6555 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6556 get_section_name (section
),
6557 get_section_file_name (section
));
6559 dwarf2_read_section (objfile
, section
);
6561 info_ptr
= section
->buffer
;
6563 while (info_ptr
< section
->buffer
+ section
->size
)
6565 unsigned int length
, initial_length_size
;
6566 struct dwarf2_per_cu_data
*this_cu
;
6569 offset
.sect_off
= info_ptr
- section
->buffer
;
6571 /* Read just enough information to find out where the next
6572 compilation unit is. */
6573 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6575 /* Save the compilation unit for later lookup. */
6576 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6577 memset (this_cu
, 0, sizeof (*this_cu
));
6578 this_cu
->offset
= offset
;
6579 this_cu
->length
= length
+ initial_length_size
;
6580 this_cu
->is_dwz
= is_dwz
;
6581 this_cu
->objfile
= objfile
;
6582 this_cu
->section
= section
;
6584 if (*n_comp_units
== *n_allocated
)
6587 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6588 *all_comp_units
, *n_allocated
);
6590 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6593 info_ptr
= info_ptr
+ this_cu
->length
;
6597 /* Create a list of all compilation units in OBJFILE.
6598 This is only done for -readnow and building partial symtabs. */
6601 create_all_comp_units (struct objfile
*objfile
)
6605 struct dwarf2_per_cu_data
**all_comp_units
;
6606 struct dwz_file
*dwz
;
6610 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6612 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6613 &n_allocated
, &n_comp_units
, &all_comp_units
);
6615 dwz
= dwarf2_get_dwz_file ();
6617 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6618 &n_allocated
, &n_comp_units
,
6621 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6622 struct dwarf2_per_cu_data
*,
6624 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6625 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6626 xfree (all_comp_units
);
6627 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6630 /* Process all loaded DIEs for compilation unit CU, starting at
6631 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6632 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6633 DW_AT_ranges). See the comments of add_partial_subprogram on how
6634 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6637 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6638 CORE_ADDR
*highpc
, int set_addrmap
,
6639 struct dwarf2_cu
*cu
)
6641 struct partial_die_info
*pdi
;
6643 /* Now, march along the PDI's, descending into ones which have
6644 interesting children but skipping the children of the other ones,
6645 until we reach the end of the compilation unit. */
6651 fixup_partial_die (pdi
, cu
);
6653 /* Anonymous namespaces or modules have no name but have interesting
6654 children, so we need to look at them. Ditto for anonymous
6657 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6658 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6659 || pdi
->tag
== DW_TAG_imported_unit
)
6663 case DW_TAG_subprogram
:
6664 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6666 case DW_TAG_constant
:
6667 case DW_TAG_variable
:
6668 case DW_TAG_typedef
:
6669 case DW_TAG_union_type
:
6670 if (!pdi
->is_declaration
)
6672 add_partial_symbol (pdi
, cu
);
6675 case DW_TAG_class_type
:
6676 case DW_TAG_interface_type
:
6677 case DW_TAG_structure_type
:
6678 if (!pdi
->is_declaration
)
6680 add_partial_symbol (pdi
, cu
);
6683 case DW_TAG_enumeration_type
:
6684 if (!pdi
->is_declaration
)
6685 add_partial_enumeration (pdi
, cu
);
6687 case DW_TAG_base_type
:
6688 case DW_TAG_subrange_type
:
6689 /* File scope base type definitions are added to the partial
6691 add_partial_symbol (pdi
, cu
);
6693 case DW_TAG_namespace
:
6694 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6697 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6699 case DW_TAG_imported_unit
:
6701 struct dwarf2_per_cu_data
*per_cu
;
6703 /* For now we don't handle imported units in type units. */
6704 if (cu
->per_cu
->is_debug_types
)
6706 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6707 " supported in type units [in module %s]"),
6708 objfile_name (cu
->objfile
));
6711 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6715 /* Go read the partial unit, if needed. */
6716 if (per_cu
->v
.psymtab
== NULL
)
6717 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6719 VEC_safe_push (dwarf2_per_cu_ptr
,
6720 cu
->per_cu
->imported_symtabs
, per_cu
);
6723 case DW_TAG_imported_declaration
:
6724 add_partial_symbol (pdi
, cu
);
6731 /* If the die has a sibling, skip to the sibling. */
6733 pdi
= pdi
->die_sibling
;
6737 /* Functions used to compute the fully scoped name of a partial DIE.
6739 Normally, this is simple. For C++, the parent DIE's fully scoped
6740 name is concatenated with "::" and the partial DIE's name. For
6741 Java, the same thing occurs except that "." is used instead of "::".
6742 Enumerators are an exception; they use the scope of their parent
6743 enumeration type, i.e. the name of the enumeration type is not
6744 prepended to the enumerator.
6746 There are two complexities. One is DW_AT_specification; in this
6747 case "parent" means the parent of the target of the specification,
6748 instead of the direct parent of the DIE. The other is compilers
6749 which do not emit DW_TAG_namespace; in this case we try to guess
6750 the fully qualified name of structure types from their members'
6751 linkage names. This must be done using the DIE's children rather
6752 than the children of any DW_AT_specification target. We only need
6753 to do this for structures at the top level, i.e. if the target of
6754 any DW_AT_specification (if any; otherwise the DIE itself) does not
6757 /* Compute the scope prefix associated with PDI's parent, in
6758 compilation unit CU. The result will be allocated on CU's
6759 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6760 field. NULL is returned if no prefix is necessary. */
6762 partial_die_parent_scope (struct partial_die_info
*pdi
,
6763 struct dwarf2_cu
*cu
)
6765 const char *grandparent_scope
;
6766 struct partial_die_info
*parent
, *real_pdi
;
6768 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6769 then this means the parent of the specification DIE. */
6772 while (real_pdi
->has_specification
)
6773 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6774 real_pdi
->spec_is_dwz
, cu
);
6776 parent
= real_pdi
->die_parent
;
6780 if (parent
->scope_set
)
6781 return parent
->scope
;
6783 fixup_partial_die (parent
, cu
);
6785 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6787 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6788 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6789 Work around this problem here. */
6790 if (cu
->language
== language_cplus
6791 && parent
->tag
== DW_TAG_namespace
6792 && strcmp (parent
->name
, "::") == 0
6793 && grandparent_scope
== NULL
)
6795 parent
->scope
= NULL
;
6796 parent
->scope_set
= 1;
6800 if (pdi
->tag
== DW_TAG_enumerator
)
6801 /* Enumerators should not get the name of the enumeration as a prefix. */
6802 parent
->scope
= grandparent_scope
;
6803 else if (parent
->tag
== DW_TAG_namespace
6804 || parent
->tag
== DW_TAG_module
6805 || parent
->tag
== DW_TAG_structure_type
6806 || parent
->tag
== DW_TAG_class_type
6807 || parent
->tag
== DW_TAG_interface_type
6808 || parent
->tag
== DW_TAG_union_type
6809 || parent
->tag
== DW_TAG_enumeration_type
)
6811 if (grandparent_scope
== NULL
)
6812 parent
->scope
= parent
->name
;
6814 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6816 parent
->name
, 0, cu
);
6820 /* FIXME drow/2004-04-01: What should we be doing with
6821 function-local names? For partial symbols, we should probably be
6823 complaint (&symfile_complaints
,
6824 _("unhandled containing DIE tag %d for DIE at %d"),
6825 parent
->tag
, pdi
->offset
.sect_off
);
6826 parent
->scope
= grandparent_scope
;
6829 parent
->scope_set
= 1;
6830 return parent
->scope
;
6833 /* Return the fully scoped name associated with PDI, from compilation unit
6834 CU. The result will be allocated with malloc. */
6837 partial_die_full_name (struct partial_die_info
*pdi
,
6838 struct dwarf2_cu
*cu
)
6840 const char *parent_scope
;
6842 /* If this is a template instantiation, we can not work out the
6843 template arguments from partial DIEs. So, unfortunately, we have
6844 to go through the full DIEs. At least any work we do building
6845 types here will be reused if full symbols are loaded later. */
6846 if (pdi
->has_template_arguments
)
6848 fixup_partial_die (pdi
, cu
);
6850 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6852 struct die_info
*die
;
6853 struct attribute attr
;
6854 struct dwarf2_cu
*ref_cu
= cu
;
6856 /* DW_FORM_ref_addr is using section offset. */
6858 attr
.form
= DW_FORM_ref_addr
;
6859 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6860 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6862 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6866 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6867 if (parent_scope
== NULL
)
6870 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6874 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6876 struct objfile
*objfile
= cu
->objfile
;
6877 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6879 const char *actual_name
= NULL
;
6881 char *built_actual_name
;
6883 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6885 built_actual_name
= partial_die_full_name (pdi
, cu
);
6886 if (built_actual_name
!= NULL
)
6887 actual_name
= built_actual_name
;
6889 if (actual_name
== NULL
)
6890 actual_name
= pdi
->name
;
6894 case DW_TAG_subprogram
:
6895 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6896 if (pdi
->is_external
|| cu
->language
== language_ada
)
6898 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6899 of the global scope. But in Ada, we want to be able to access
6900 nested procedures globally. So all Ada subprograms are stored
6901 in the global scope. */
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 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6911 built_actual_name
!= NULL
,
6912 VAR_DOMAIN
, LOC_BLOCK
,
6913 &objfile
->static_psymbols
,
6914 addr
, cu
->language
, objfile
);
6917 case DW_TAG_constant
:
6919 struct psymbol_allocation_list
*list
;
6921 if (pdi
->is_external
)
6922 list
= &objfile
->global_psymbols
;
6924 list
= &objfile
->static_psymbols
;
6925 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6926 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6927 list
, 0, cu
->language
, objfile
);
6930 case DW_TAG_variable
:
6932 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6936 && !dwarf2_per_objfile
->has_section_at_zero
)
6938 /* A global or static variable may also have been stripped
6939 out by the linker if unused, in which case its address
6940 will be nullified; do not add such variables into partial
6941 symbol table then. */
6943 else if (pdi
->is_external
)
6946 Don't enter into the minimal symbol tables as there is
6947 a minimal symbol table entry from the ELF symbols already.
6948 Enter into partial symbol table if it has a location
6949 descriptor or a type.
6950 If the location descriptor is missing, new_symbol will create
6951 a LOC_UNRESOLVED symbol, the address of the variable will then
6952 be determined from the minimal symbol table whenever the variable
6954 The address for the partial symbol table entry is not
6955 used by GDB, but it comes in handy for debugging partial symbol
6958 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6959 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6960 built_actual_name
!= NULL
,
6961 VAR_DOMAIN
, LOC_STATIC
,
6962 &objfile
->global_psymbols
,
6964 cu
->language
, objfile
);
6968 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6970 /* Static Variable. Skip symbols whose value we cannot know (those
6971 without location descriptors or constant values). */
6972 if (!has_loc
&& !pdi
->has_const_value
)
6974 xfree (built_actual_name
);
6978 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6979 built_actual_name
!= NULL
,
6980 VAR_DOMAIN
, LOC_STATIC
,
6981 &objfile
->static_psymbols
,
6982 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6983 cu
->language
, objfile
);
6986 case DW_TAG_typedef
:
6987 case DW_TAG_base_type
:
6988 case DW_TAG_subrange_type
:
6989 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6990 built_actual_name
!= NULL
,
6991 VAR_DOMAIN
, LOC_TYPEDEF
,
6992 &objfile
->static_psymbols
,
6993 0, cu
->language
, objfile
);
6995 case DW_TAG_imported_declaration
:
6996 case DW_TAG_namespace
:
6997 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6998 built_actual_name
!= NULL
,
6999 VAR_DOMAIN
, LOC_TYPEDEF
,
7000 &objfile
->global_psymbols
,
7001 0, cu
->language
, objfile
);
7004 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7005 built_actual_name
!= NULL
,
7006 MODULE_DOMAIN
, LOC_TYPEDEF
,
7007 &objfile
->global_psymbols
,
7008 0, cu
->language
, objfile
);
7010 case DW_TAG_class_type
:
7011 case DW_TAG_interface_type
:
7012 case DW_TAG_structure_type
:
7013 case DW_TAG_union_type
:
7014 case DW_TAG_enumeration_type
:
7015 /* Skip external references. The DWARF standard says in the section
7016 about "Structure, Union, and Class Type Entries": "An incomplete
7017 structure, union or class type is represented by a structure,
7018 union or class entry that does not have a byte size attribute
7019 and that has a DW_AT_declaration attribute." */
7020 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7022 xfree (built_actual_name
);
7026 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7027 static vs. global. */
7028 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7029 built_actual_name
!= NULL
,
7030 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7031 (cu
->language
== language_cplus
7032 || cu
->language
== language_java
)
7033 ? &objfile
->global_psymbols
7034 : &objfile
->static_psymbols
,
7035 0, cu
->language
, objfile
);
7038 case DW_TAG_enumerator
:
7039 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7040 built_actual_name
!= NULL
,
7041 VAR_DOMAIN
, LOC_CONST
,
7042 (cu
->language
== language_cplus
7043 || cu
->language
== language_java
)
7044 ? &objfile
->global_psymbols
7045 : &objfile
->static_psymbols
,
7046 0, cu
->language
, objfile
);
7052 xfree (built_actual_name
);
7055 /* Read a partial die corresponding to a namespace; also, add a symbol
7056 corresponding to that namespace to the symbol table. NAMESPACE is
7057 the name of the enclosing namespace. */
7060 add_partial_namespace (struct partial_die_info
*pdi
,
7061 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7062 int set_addrmap
, struct dwarf2_cu
*cu
)
7064 /* Add a symbol for the namespace. */
7066 add_partial_symbol (pdi
, cu
);
7068 /* Now scan partial symbols in that namespace. */
7070 if (pdi
->has_children
)
7071 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7074 /* Read a partial die corresponding to a Fortran module. */
7077 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7078 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7080 /* Add a symbol for the namespace. */
7082 add_partial_symbol (pdi
, cu
);
7084 /* Now scan partial symbols in that module. */
7086 if (pdi
->has_children
)
7087 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7090 /* Read a partial die corresponding to a subprogram and create a partial
7091 symbol for that subprogram. When the CU language allows it, this
7092 routine also defines a partial symbol for each nested subprogram
7093 that this subprogram contains. If SET_ADDRMAP is true, record the
7094 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7095 and highest PC values found in PDI.
7097 PDI may also be a lexical block, in which case we simply search
7098 recursively for subprograms defined inside that lexical block.
7099 Again, this is only performed when the CU language allows this
7100 type of definitions. */
7103 add_partial_subprogram (struct partial_die_info
*pdi
,
7104 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7105 int set_addrmap
, struct dwarf2_cu
*cu
)
7107 if (pdi
->tag
== DW_TAG_subprogram
)
7109 if (pdi
->has_pc_info
)
7111 if (pdi
->lowpc
< *lowpc
)
7112 *lowpc
= pdi
->lowpc
;
7113 if (pdi
->highpc
> *highpc
)
7114 *highpc
= pdi
->highpc
;
7117 struct objfile
*objfile
= cu
->objfile
;
7118 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7123 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7124 SECT_OFF_TEXT (objfile
));
7125 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7126 pdi
->lowpc
+ baseaddr
);
7127 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7128 pdi
->highpc
+ baseaddr
);
7129 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7130 cu
->per_cu
->v
.psymtab
);
7134 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7136 if (!pdi
->is_declaration
)
7137 /* Ignore subprogram DIEs that do not have a name, they are
7138 illegal. Do not emit a complaint at this point, we will
7139 do so when we convert this psymtab into a symtab. */
7141 add_partial_symbol (pdi
, cu
);
7145 if (! pdi
->has_children
)
7148 if (cu
->language
== language_ada
)
7150 pdi
= pdi
->die_child
;
7153 fixup_partial_die (pdi
, cu
);
7154 if (pdi
->tag
== DW_TAG_subprogram
7155 || pdi
->tag
== DW_TAG_lexical_block
)
7156 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7157 pdi
= pdi
->die_sibling
;
7162 /* Read a partial die corresponding to an enumeration type. */
7165 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7166 struct dwarf2_cu
*cu
)
7168 struct partial_die_info
*pdi
;
7170 if (enum_pdi
->name
!= NULL
)
7171 add_partial_symbol (enum_pdi
, cu
);
7173 pdi
= enum_pdi
->die_child
;
7176 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7177 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7179 add_partial_symbol (pdi
, cu
);
7180 pdi
= pdi
->die_sibling
;
7184 /* Return the initial uleb128 in the die at INFO_PTR. */
7187 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7189 unsigned int bytes_read
;
7191 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7194 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7195 Return the corresponding abbrev, or NULL if the number is zero (indicating
7196 an empty DIE). In either case *BYTES_READ will be set to the length of
7197 the initial number. */
7199 static struct abbrev_info
*
7200 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7201 struct dwarf2_cu
*cu
)
7203 bfd
*abfd
= cu
->objfile
->obfd
;
7204 unsigned int abbrev_number
;
7205 struct abbrev_info
*abbrev
;
7207 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7209 if (abbrev_number
== 0)
7212 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7215 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7216 " at offset 0x%x [in module %s]"),
7217 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7218 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7224 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7225 Returns a pointer to the end of a series of DIEs, terminated by an empty
7226 DIE. Any children of the skipped DIEs will also be skipped. */
7228 static const gdb_byte
*
7229 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7231 struct dwarf2_cu
*cu
= reader
->cu
;
7232 struct abbrev_info
*abbrev
;
7233 unsigned int bytes_read
;
7237 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7239 return info_ptr
+ bytes_read
;
7241 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7245 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7246 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7247 abbrev corresponding to that skipped uleb128 should be passed in
7248 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7251 static const gdb_byte
*
7252 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7253 struct abbrev_info
*abbrev
)
7255 unsigned int bytes_read
;
7256 struct attribute attr
;
7257 bfd
*abfd
= reader
->abfd
;
7258 struct dwarf2_cu
*cu
= reader
->cu
;
7259 const gdb_byte
*buffer
= reader
->buffer
;
7260 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7261 const gdb_byte
*start_info_ptr
= info_ptr
;
7262 unsigned int form
, i
;
7264 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7266 /* The only abbrev we care about is DW_AT_sibling. */
7267 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7269 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7270 if (attr
.form
== DW_FORM_ref_addr
)
7271 complaint (&symfile_complaints
,
7272 _("ignoring absolute DW_AT_sibling"));
7275 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7276 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7278 if (sibling_ptr
< info_ptr
)
7279 complaint (&symfile_complaints
,
7280 _("DW_AT_sibling points backwards"));
7281 else if (sibling_ptr
> reader
->buffer_end
)
7282 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7288 /* If it isn't DW_AT_sibling, skip this attribute. */
7289 form
= abbrev
->attrs
[i
].form
;
7293 case DW_FORM_ref_addr
:
7294 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7295 and later it is offset sized. */
7296 if (cu
->header
.version
== 2)
7297 info_ptr
+= cu
->header
.addr_size
;
7299 info_ptr
+= cu
->header
.offset_size
;
7301 case DW_FORM_GNU_ref_alt
:
7302 info_ptr
+= cu
->header
.offset_size
;
7305 info_ptr
+= cu
->header
.addr_size
;
7312 case DW_FORM_flag_present
:
7324 case DW_FORM_ref_sig8
:
7327 case DW_FORM_string
:
7328 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7329 info_ptr
+= bytes_read
;
7331 case DW_FORM_sec_offset
:
7333 case DW_FORM_GNU_strp_alt
:
7334 info_ptr
+= cu
->header
.offset_size
;
7336 case DW_FORM_exprloc
:
7338 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7339 info_ptr
+= bytes_read
;
7341 case DW_FORM_block1
:
7342 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7344 case DW_FORM_block2
:
7345 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7347 case DW_FORM_block4
:
7348 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7352 case DW_FORM_ref_udata
:
7353 case DW_FORM_GNU_addr_index
:
7354 case DW_FORM_GNU_str_index
:
7355 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7357 case DW_FORM_indirect
:
7358 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7359 info_ptr
+= bytes_read
;
7360 /* We need to continue parsing from here, so just go back to
7362 goto skip_attribute
;
7365 error (_("Dwarf Error: Cannot handle %s "
7366 "in DWARF reader [in module %s]"),
7367 dwarf_form_name (form
),
7368 bfd_get_filename (abfd
));
7372 if (abbrev
->has_children
)
7373 return skip_children (reader
, info_ptr
);
7378 /* Locate ORIG_PDI's sibling.
7379 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7381 static const gdb_byte
*
7382 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7383 struct partial_die_info
*orig_pdi
,
7384 const gdb_byte
*info_ptr
)
7386 /* Do we know the sibling already? */
7388 if (orig_pdi
->sibling
)
7389 return orig_pdi
->sibling
;
7391 /* Are there any children to deal with? */
7393 if (!orig_pdi
->has_children
)
7396 /* Skip the children the long way. */
7398 return skip_children (reader
, info_ptr
);
7401 /* Expand this partial symbol table into a full symbol table. SELF is
7405 dwarf2_read_symtab (struct partial_symtab
*self
,
7406 struct objfile
*objfile
)
7410 warning (_("bug: psymtab for %s is already read in."),
7417 printf_filtered (_("Reading in symbols for %s..."),
7419 gdb_flush (gdb_stdout
);
7422 /* Restore our global data. */
7424 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7425 dwarf2_objfile_data_key
);
7427 /* If this psymtab is constructed from a debug-only objfile, the
7428 has_section_at_zero flag will not necessarily be correct. We
7429 can get the correct value for this flag by looking at the data
7430 associated with the (presumably stripped) associated objfile. */
7431 if (objfile
->separate_debug_objfile_backlink
)
7433 struct dwarf2_per_objfile
*dpo_backlink
7434 = ((struct dwarf2_per_objfile
*)
7435 objfile_data (objfile
->separate_debug_objfile_backlink
,
7436 dwarf2_objfile_data_key
));
7438 dwarf2_per_objfile
->has_section_at_zero
7439 = dpo_backlink
->has_section_at_zero
;
7442 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7444 psymtab_to_symtab_1 (self
);
7446 /* Finish up the debug error message. */
7448 printf_filtered (_("done.\n"));
7451 process_cu_includes ();
7454 /* Reading in full CUs. */
7456 /* Add PER_CU to the queue. */
7459 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7460 enum language pretend_language
)
7462 struct dwarf2_queue_item
*item
;
7465 item
= XNEW (struct dwarf2_queue_item
);
7466 item
->per_cu
= per_cu
;
7467 item
->pretend_language
= pretend_language
;
7470 if (dwarf2_queue
== NULL
)
7471 dwarf2_queue
= item
;
7473 dwarf2_queue_tail
->next
= item
;
7475 dwarf2_queue_tail
= item
;
7478 /* If PER_CU is not yet queued, add it to the queue.
7479 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7481 The result is non-zero if PER_CU was queued, otherwise the result is zero
7482 meaning either PER_CU is already queued or it is already loaded.
7484 N.B. There is an invariant here that if a CU is queued then it is loaded.
7485 The caller is required to load PER_CU if we return non-zero. */
7488 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7489 struct dwarf2_per_cu_data
*per_cu
,
7490 enum language pretend_language
)
7492 /* We may arrive here during partial symbol reading, if we need full
7493 DIEs to process an unusual case (e.g. template arguments). Do
7494 not queue PER_CU, just tell our caller to load its DIEs. */
7495 if (dwarf2_per_objfile
->reading_partial_symbols
)
7497 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7502 /* Mark the dependence relation so that we don't flush PER_CU
7504 if (dependent_cu
!= NULL
)
7505 dwarf2_add_dependence (dependent_cu
, per_cu
);
7507 /* If it's already on the queue, we have nothing to do. */
7511 /* If the compilation unit is already loaded, just mark it as
7513 if (per_cu
->cu
!= NULL
)
7515 per_cu
->cu
->last_used
= 0;
7519 /* Add it to the queue. */
7520 queue_comp_unit (per_cu
, pretend_language
);
7525 /* Process the queue. */
7528 process_queue (void)
7530 struct dwarf2_queue_item
*item
, *next_item
;
7532 if (dwarf_read_debug
)
7534 fprintf_unfiltered (gdb_stdlog
,
7535 "Expanding one or more symtabs of objfile %s ...\n",
7536 objfile_name (dwarf2_per_objfile
->objfile
));
7539 /* The queue starts out with one item, but following a DIE reference
7540 may load a new CU, adding it to the end of the queue. */
7541 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7543 if ((dwarf2_per_objfile
->using_index
7544 ? !item
->per_cu
->v
.quick
->compunit_symtab
7545 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7546 /* Skip dummy CUs. */
7547 && item
->per_cu
->cu
!= NULL
)
7549 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7550 unsigned int debug_print_threshold
;
7553 if (per_cu
->is_debug_types
)
7555 struct signatured_type
*sig_type
=
7556 (struct signatured_type
*) per_cu
;
7558 sprintf (buf
, "TU %s at offset 0x%x",
7559 hex_string (sig_type
->signature
),
7560 per_cu
->offset
.sect_off
);
7561 /* There can be 100s of TUs.
7562 Only print them in verbose mode. */
7563 debug_print_threshold
= 2;
7567 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7568 debug_print_threshold
= 1;
7571 if (dwarf_read_debug
>= debug_print_threshold
)
7572 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7574 if (per_cu
->is_debug_types
)
7575 process_full_type_unit (per_cu
, item
->pretend_language
);
7577 process_full_comp_unit (per_cu
, item
->pretend_language
);
7579 if (dwarf_read_debug
>= debug_print_threshold
)
7580 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7583 item
->per_cu
->queued
= 0;
7584 next_item
= item
->next
;
7588 dwarf2_queue_tail
= NULL
;
7590 if (dwarf_read_debug
)
7592 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7593 objfile_name (dwarf2_per_objfile
->objfile
));
7597 /* Free all allocated queue entries. This function only releases anything if
7598 an error was thrown; if the queue was processed then it would have been
7599 freed as we went along. */
7602 dwarf2_release_queue (void *dummy
)
7604 struct dwarf2_queue_item
*item
, *last
;
7606 item
= dwarf2_queue
;
7609 /* Anything still marked queued is likely to be in an
7610 inconsistent state, so discard it. */
7611 if (item
->per_cu
->queued
)
7613 if (item
->per_cu
->cu
!= NULL
)
7614 free_one_cached_comp_unit (item
->per_cu
);
7615 item
->per_cu
->queued
= 0;
7623 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7626 /* Read in full symbols for PST, and anything it depends on. */
7629 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7631 struct dwarf2_per_cu_data
*per_cu
;
7637 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7638 if (!pst
->dependencies
[i
]->readin
7639 && pst
->dependencies
[i
]->user
== NULL
)
7641 /* Inform about additional files that need to be read in. */
7644 /* FIXME: i18n: Need to make this a single string. */
7645 fputs_filtered (" ", gdb_stdout
);
7647 fputs_filtered ("and ", gdb_stdout
);
7649 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7650 wrap_here (""); /* Flush output. */
7651 gdb_flush (gdb_stdout
);
7653 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7656 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7660 /* It's an include file, no symbols to read for it.
7661 Everything is in the parent symtab. */
7666 dw2_do_instantiate_symtab (per_cu
);
7669 /* Trivial hash function for die_info: the hash value of a DIE
7670 is its offset in .debug_info for this objfile. */
7673 die_hash (const void *item
)
7675 const struct die_info
*die
= (const struct die_info
*) item
;
7677 return die
->offset
.sect_off
;
7680 /* Trivial comparison function for die_info structures: two DIEs
7681 are equal if they have the same offset. */
7684 die_eq (const void *item_lhs
, const void *item_rhs
)
7686 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7687 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7689 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7692 /* die_reader_func for load_full_comp_unit.
7693 This is identical to read_signatured_type_reader,
7694 but is kept separate for now. */
7697 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7698 const gdb_byte
*info_ptr
,
7699 struct die_info
*comp_unit_die
,
7703 struct dwarf2_cu
*cu
= reader
->cu
;
7704 enum language
*language_ptr
= (enum language
*) data
;
7706 gdb_assert (cu
->die_hash
== NULL
);
7708 htab_create_alloc_ex (cu
->header
.length
/ 12,
7712 &cu
->comp_unit_obstack
,
7713 hashtab_obstack_allocate
,
7714 dummy_obstack_deallocate
);
7717 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7718 &info_ptr
, comp_unit_die
);
7719 cu
->dies
= comp_unit_die
;
7720 /* comp_unit_die is not stored in die_hash, no need. */
7722 /* We try not to read any attributes in this function, because not
7723 all CUs needed for references have been loaded yet, and symbol
7724 table processing isn't initialized. But we have to set the CU language,
7725 or we won't be able to build types correctly.
7726 Similarly, if we do not read the producer, we can not apply
7727 producer-specific interpretation. */
7728 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7731 /* Load the DIEs associated with PER_CU into memory. */
7734 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7735 enum language pretend_language
)
7737 gdb_assert (! this_cu
->is_debug_types
);
7739 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7740 load_full_comp_unit_reader
, &pretend_language
);
7743 /* Add a DIE to the delayed physname list. */
7746 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7747 const char *name
, struct die_info
*die
,
7748 struct dwarf2_cu
*cu
)
7750 struct delayed_method_info mi
;
7752 mi
.fnfield_index
= fnfield_index
;
7756 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7759 /* A cleanup for freeing the delayed method list. */
7762 free_delayed_list (void *ptr
)
7764 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7765 if (cu
->method_list
!= NULL
)
7767 VEC_free (delayed_method_info
, cu
->method_list
);
7768 cu
->method_list
= NULL
;
7772 /* Compute the physnames of any methods on the CU's method list.
7774 The computation of method physnames is delayed in order to avoid the
7775 (bad) condition that one of the method's formal parameters is of an as yet
7779 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7782 struct delayed_method_info
*mi
;
7783 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7785 const char *physname
;
7786 struct fn_fieldlist
*fn_flp
7787 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7788 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7789 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7790 = physname
? physname
: "";
7794 /* Go objects should be embedded in a DW_TAG_module DIE,
7795 and it's not clear if/how imported objects will appear.
7796 To keep Go support simple until that's worked out,
7797 go back through what we've read and create something usable.
7798 We could do this while processing each DIE, and feels kinda cleaner,
7799 but that way is more invasive.
7800 This is to, for example, allow the user to type "p var" or "b main"
7801 without having to specify the package name, and allow lookups
7802 of module.object to work in contexts that use the expression
7806 fixup_go_packaging (struct dwarf2_cu
*cu
)
7808 char *package_name
= NULL
;
7809 struct pending
*list
;
7812 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7814 for (i
= 0; i
< list
->nsyms
; ++i
)
7816 struct symbol
*sym
= list
->symbol
[i
];
7818 if (SYMBOL_LANGUAGE (sym
) == language_go
7819 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7821 char *this_package_name
= go_symbol_package_name (sym
);
7823 if (this_package_name
== NULL
)
7825 if (package_name
== NULL
)
7826 package_name
= this_package_name
;
7829 if (strcmp (package_name
, this_package_name
) != 0)
7830 complaint (&symfile_complaints
,
7831 _("Symtab %s has objects from two different Go packages: %s and %s"),
7832 (symbol_symtab (sym
) != NULL
7833 ? symtab_to_filename_for_display
7834 (symbol_symtab (sym
))
7835 : objfile_name (cu
->objfile
)),
7836 this_package_name
, package_name
);
7837 xfree (this_package_name
);
7843 if (package_name
!= NULL
)
7845 struct objfile
*objfile
= cu
->objfile
;
7846 const char *saved_package_name
7847 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7849 strlen (package_name
));
7850 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7851 saved_package_name
, objfile
);
7854 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7856 sym
= allocate_symbol (objfile
);
7857 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7858 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7859 strlen (saved_package_name
), 0, objfile
);
7860 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7861 e.g., "main" finds the "main" module and not C's main(). */
7862 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7863 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7864 SYMBOL_TYPE (sym
) = type
;
7866 add_symbol_to_list (sym
, &global_symbols
);
7868 xfree (package_name
);
7872 /* Return the symtab for PER_CU. This works properly regardless of
7873 whether we're using the index or psymtabs. */
7875 static struct compunit_symtab
*
7876 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7878 return (dwarf2_per_objfile
->using_index
7879 ? per_cu
->v
.quick
->compunit_symtab
7880 : per_cu
->v
.psymtab
->compunit_symtab
);
7883 /* A helper function for computing the list of all symbol tables
7884 included by PER_CU. */
7887 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7888 htab_t all_children
, htab_t all_type_symtabs
,
7889 struct dwarf2_per_cu_data
*per_cu
,
7890 struct compunit_symtab
*immediate_parent
)
7894 struct compunit_symtab
*cust
;
7895 struct dwarf2_per_cu_data
*iter
;
7897 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7900 /* This inclusion and its children have been processed. */
7905 /* Only add a CU if it has a symbol table. */
7906 cust
= get_compunit_symtab (per_cu
);
7909 /* If this is a type unit only add its symbol table if we haven't
7910 seen it yet (type unit per_cu's can share symtabs). */
7911 if (per_cu
->is_debug_types
)
7913 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7917 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7918 if (cust
->user
== NULL
)
7919 cust
->user
= immediate_parent
;
7924 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7925 if (cust
->user
== NULL
)
7926 cust
->user
= immediate_parent
;
7931 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7934 recursively_compute_inclusions (result
, all_children
,
7935 all_type_symtabs
, iter
, cust
);
7939 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7943 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7945 gdb_assert (! per_cu
->is_debug_types
);
7947 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7950 struct dwarf2_per_cu_data
*per_cu_iter
;
7951 struct compunit_symtab
*compunit_symtab_iter
;
7952 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7953 htab_t all_children
, all_type_symtabs
;
7954 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7956 /* If we don't have a symtab, we can just skip this case. */
7960 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7961 NULL
, xcalloc
, xfree
);
7962 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7963 NULL
, xcalloc
, xfree
);
7966 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7970 recursively_compute_inclusions (&result_symtabs
, all_children
,
7971 all_type_symtabs
, per_cu_iter
,
7975 /* Now we have a transitive closure of all the included symtabs. */
7976 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7978 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7979 struct compunit_symtab
*, len
+ 1);
7981 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7982 compunit_symtab_iter
);
7984 cust
->includes
[ix
] = compunit_symtab_iter
;
7985 cust
->includes
[len
] = NULL
;
7987 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7988 htab_delete (all_children
);
7989 htab_delete (all_type_symtabs
);
7993 /* Compute the 'includes' field for the symtabs of all the CUs we just
7997 process_cu_includes (void)
8000 struct dwarf2_per_cu_data
*iter
;
8003 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8007 if (! iter
->is_debug_types
)
8008 compute_compunit_symtab_includes (iter
);
8011 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8014 /* Generate full symbol information for PER_CU, whose DIEs have
8015 already been loaded into memory. */
8018 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8019 enum language pretend_language
)
8021 struct dwarf2_cu
*cu
= per_cu
->cu
;
8022 struct objfile
*objfile
= per_cu
->objfile
;
8023 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8024 CORE_ADDR lowpc
, highpc
;
8025 struct compunit_symtab
*cust
;
8026 struct cleanup
*back_to
, *delayed_list_cleanup
;
8028 struct block
*static_block
;
8031 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8034 back_to
= make_cleanup (really_free_pendings
, NULL
);
8035 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8037 cu
->list_in_scope
= &file_symbols
;
8039 cu
->language
= pretend_language
;
8040 cu
->language_defn
= language_def (cu
->language
);
8042 /* Do line number decoding in read_file_scope () */
8043 process_die (cu
->dies
, cu
);
8045 /* For now fudge the Go package. */
8046 if (cu
->language
== language_go
)
8047 fixup_go_packaging (cu
);
8049 /* Now that we have processed all the DIEs in the CU, all the types
8050 should be complete, and it should now be safe to compute all of the
8052 compute_delayed_physnames (cu
);
8053 do_cleanups (delayed_list_cleanup
);
8055 /* Some compilers don't define a DW_AT_high_pc attribute for the
8056 compilation unit. If the DW_AT_high_pc is missing, synthesize
8057 it, by scanning the DIE's below the compilation unit. */
8058 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8060 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8061 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8063 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8064 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8065 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8066 addrmap to help ensure it has an accurate map of pc values belonging to
8068 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8070 cust
= end_symtab_from_static_block (static_block
,
8071 SECT_OFF_TEXT (objfile
), 0);
8075 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8077 /* Set symtab language to language from DW_AT_language. If the
8078 compilation is from a C file generated by language preprocessors, do
8079 not set the language if it was already deduced by start_subfile. */
8080 if (!(cu
->language
== language_c
8081 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8082 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8084 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8085 produce DW_AT_location with location lists but it can be possibly
8086 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8087 there were bugs in prologue debug info, fixed later in GCC-4.5
8088 by "unwind info for epilogues" patch (which is not directly related).
8090 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8091 needed, it would be wrong due to missing DW_AT_producer there.
8093 Still one can confuse GDB by using non-standard GCC compilation
8094 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8096 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8097 cust
->locations_valid
= 1;
8099 if (gcc_4_minor
>= 5)
8100 cust
->epilogue_unwind_valid
= 1;
8102 cust
->call_site_htab
= cu
->call_site_htab
;
8105 if (dwarf2_per_objfile
->using_index
)
8106 per_cu
->v
.quick
->compunit_symtab
= cust
;
8109 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8110 pst
->compunit_symtab
= cust
;
8114 /* Push it for inclusion processing later. */
8115 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8117 do_cleanups (back_to
);
8120 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8121 already been loaded into memory. */
8124 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8125 enum language pretend_language
)
8127 struct dwarf2_cu
*cu
= per_cu
->cu
;
8128 struct objfile
*objfile
= per_cu
->objfile
;
8129 struct compunit_symtab
*cust
;
8130 struct cleanup
*back_to
, *delayed_list_cleanup
;
8131 struct signatured_type
*sig_type
;
8133 gdb_assert (per_cu
->is_debug_types
);
8134 sig_type
= (struct signatured_type
*) per_cu
;
8137 back_to
= make_cleanup (really_free_pendings
, NULL
);
8138 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8140 cu
->list_in_scope
= &file_symbols
;
8142 cu
->language
= pretend_language
;
8143 cu
->language_defn
= language_def (cu
->language
);
8145 /* The symbol tables are set up in read_type_unit_scope. */
8146 process_die (cu
->dies
, cu
);
8148 /* For now fudge the Go package. */
8149 if (cu
->language
== language_go
)
8150 fixup_go_packaging (cu
);
8152 /* Now that we have processed all the DIEs in the CU, all the types
8153 should be complete, and it should now be safe to compute all of the
8155 compute_delayed_physnames (cu
);
8156 do_cleanups (delayed_list_cleanup
);
8158 /* TUs share symbol tables.
8159 If this is the first TU to use this symtab, complete the construction
8160 of it with end_expandable_symtab. Otherwise, complete the addition of
8161 this TU's symbols to the existing symtab. */
8162 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8164 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8165 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8169 /* Set symtab language to language from DW_AT_language. If the
8170 compilation is from a C file generated by language preprocessors,
8171 do not set the language if it was already deduced by
8173 if (!(cu
->language
== language_c
8174 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8175 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8180 augment_type_symtab ();
8181 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8184 if (dwarf2_per_objfile
->using_index
)
8185 per_cu
->v
.quick
->compunit_symtab
= cust
;
8188 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8189 pst
->compunit_symtab
= cust
;
8193 do_cleanups (back_to
);
8196 /* Process an imported unit DIE. */
8199 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8201 struct attribute
*attr
;
8203 /* For now we don't handle imported units in type units. */
8204 if (cu
->per_cu
->is_debug_types
)
8206 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8207 " supported in type units [in module %s]"),
8208 objfile_name (cu
->objfile
));
8211 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8214 struct dwarf2_per_cu_data
*per_cu
;
8215 struct symtab
*imported_symtab
;
8219 offset
= dwarf2_get_ref_die_offset (attr
);
8220 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8221 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8223 /* If necessary, add it to the queue and load its DIEs. */
8224 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8225 load_full_comp_unit (per_cu
, cu
->language
);
8227 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8232 /* Reset the in_process bit of a die. */
8235 reset_die_in_process (void *arg
)
8237 struct die_info
*die
= (struct die_info
*) arg
;
8239 die
->in_process
= 0;
8242 /* Process a die and its children. */
8245 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8247 struct cleanup
*in_process
;
8249 /* We should only be processing those not already in process. */
8250 gdb_assert (!die
->in_process
);
8252 die
->in_process
= 1;
8253 in_process
= make_cleanup (reset_die_in_process
,die
);
8257 case DW_TAG_padding
:
8259 case DW_TAG_compile_unit
:
8260 case DW_TAG_partial_unit
:
8261 read_file_scope (die
, cu
);
8263 case DW_TAG_type_unit
:
8264 read_type_unit_scope (die
, cu
);
8266 case DW_TAG_subprogram
:
8267 case DW_TAG_inlined_subroutine
:
8268 read_func_scope (die
, cu
);
8270 case DW_TAG_lexical_block
:
8271 case DW_TAG_try_block
:
8272 case DW_TAG_catch_block
:
8273 read_lexical_block_scope (die
, cu
);
8275 case DW_TAG_GNU_call_site
:
8276 read_call_site_scope (die
, cu
);
8278 case DW_TAG_class_type
:
8279 case DW_TAG_interface_type
:
8280 case DW_TAG_structure_type
:
8281 case DW_TAG_union_type
:
8282 process_structure_scope (die
, cu
);
8284 case DW_TAG_enumeration_type
:
8285 process_enumeration_scope (die
, cu
);
8288 /* These dies have a type, but processing them does not create
8289 a symbol or recurse to process the children. Therefore we can
8290 read them on-demand through read_type_die. */
8291 case DW_TAG_subroutine_type
:
8292 case DW_TAG_set_type
:
8293 case DW_TAG_array_type
:
8294 case DW_TAG_pointer_type
:
8295 case DW_TAG_ptr_to_member_type
:
8296 case DW_TAG_reference_type
:
8297 case DW_TAG_string_type
:
8300 case DW_TAG_base_type
:
8301 case DW_TAG_subrange_type
:
8302 case DW_TAG_typedef
:
8303 /* Add a typedef symbol for the type definition, if it has a
8305 new_symbol (die
, read_type_die (die
, cu
), cu
);
8307 case DW_TAG_common_block
:
8308 read_common_block (die
, cu
);
8310 case DW_TAG_common_inclusion
:
8312 case DW_TAG_namespace
:
8313 cu
->processing_has_namespace_info
= 1;
8314 read_namespace (die
, cu
);
8317 cu
->processing_has_namespace_info
= 1;
8318 read_module (die
, cu
);
8320 case DW_TAG_imported_declaration
:
8321 cu
->processing_has_namespace_info
= 1;
8322 if (read_namespace_alias (die
, cu
))
8324 /* The declaration is not a global namespace alias: fall through. */
8325 case DW_TAG_imported_module
:
8326 cu
->processing_has_namespace_info
= 1;
8327 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8328 || cu
->language
!= language_fortran
))
8329 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8330 dwarf_tag_name (die
->tag
));
8331 read_import_statement (die
, cu
);
8334 case DW_TAG_imported_unit
:
8335 process_imported_unit_die (die
, cu
);
8339 new_symbol (die
, NULL
, cu
);
8343 do_cleanups (in_process
);
8346 /* DWARF name computation. */
8348 /* A helper function for dwarf2_compute_name which determines whether DIE
8349 needs to have the name of the scope prepended to the name listed in the
8353 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8355 struct attribute
*attr
;
8359 case DW_TAG_namespace
:
8360 case DW_TAG_typedef
:
8361 case DW_TAG_class_type
:
8362 case DW_TAG_interface_type
:
8363 case DW_TAG_structure_type
:
8364 case DW_TAG_union_type
:
8365 case DW_TAG_enumeration_type
:
8366 case DW_TAG_enumerator
:
8367 case DW_TAG_subprogram
:
8368 case DW_TAG_inlined_subroutine
:
8370 case DW_TAG_imported_declaration
:
8373 case DW_TAG_variable
:
8374 case DW_TAG_constant
:
8375 /* We only need to prefix "globally" visible variables. These include
8376 any variable marked with DW_AT_external or any variable that
8377 lives in a namespace. [Variables in anonymous namespaces
8378 require prefixing, but they are not DW_AT_external.] */
8380 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8382 struct dwarf2_cu
*spec_cu
= cu
;
8384 return die_needs_namespace (die_specification (die
, &spec_cu
),
8388 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8389 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8390 && die
->parent
->tag
!= DW_TAG_module
)
8392 /* A variable in a lexical block of some kind does not need a
8393 namespace, even though in C++ such variables may be external
8394 and have a mangled name. */
8395 if (die
->parent
->tag
== DW_TAG_lexical_block
8396 || die
->parent
->tag
== DW_TAG_try_block
8397 || die
->parent
->tag
== DW_TAG_catch_block
8398 || die
->parent
->tag
== DW_TAG_subprogram
)
8407 /* Retrieve the last character from a mem_file. */
8410 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8412 char *last_char_p
= (char *) object
;
8415 *last_char_p
= buffer
[length
- 1];
8418 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8419 compute the physname for the object, which include a method's:
8420 - formal parameters (C++/Java),
8421 - receiver type (Go),
8422 - return type (Java).
8424 The term "physname" is a bit confusing.
8425 For C++, for example, it is the demangled name.
8426 For Go, for example, it's the mangled name.
8428 For Ada, return the DIE's linkage name rather than the fully qualified
8429 name. PHYSNAME is ignored..
8431 The result is allocated on the objfile_obstack and canonicalized. */
8434 dwarf2_compute_name (const char *name
,
8435 struct die_info
*die
, struct dwarf2_cu
*cu
,
8438 struct objfile
*objfile
= cu
->objfile
;
8441 name
= dwarf2_name (die
, cu
);
8443 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8444 but otherwise compute it by typename_concat inside GDB.
8445 FIXME: Actually this is not really true, or at least not always true.
8446 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8447 Fortran names because there is no mangling standard. So new_symbol_full
8448 will set the demangled name to the result of dwarf2_full_name, and it is
8449 the demangled name that GDB uses if it exists. */
8450 if (cu
->language
== language_ada
8451 || (cu
->language
== language_fortran
&& physname
))
8453 /* For Ada unit, we prefer the linkage name over the name, as
8454 the former contains the exported name, which the user expects
8455 to be able to reference. Ideally, we want the user to be able
8456 to reference this entity using either natural or linkage name,
8457 but we haven't started looking at this enhancement yet. */
8458 const char *linkage_name
;
8460 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8461 if (linkage_name
== NULL
)
8462 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8463 if (linkage_name
!= NULL
)
8464 return linkage_name
;
8467 /* These are the only languages we know how to qualify names in. */
8469 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8470 || cu
->language
== language_fortran
|| cu
->language
== language_d
))
8472 if (die_needs_namespace (die
, cu
))
8476 struct ui_file
*buf
;
8477 char *intermediate_name
;
8478 const char *canonical_name
= NULL
;
8480 prefix
= determine_prefix (die
, cu
);
8481 buf
= mem_fileopen ();
8482 if (*prefix
!= '\0')
8484 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8487 fputs_unfiltered (prefixed_name
, buf
);
8488 xfree (prefixed_name
);
8491 fputs_unfiltered (name
, buf
);
8493 /* Template parameters may be specified in the DIE's DW_AT_name, or
8494 as children with DW_TAG_template_type_param or
8495 DW_TAG_value_type_param. If the latter, add them to the name
8496 here. If the name already has template parameters, then
8497 skip this step; some versions of GCC emit both, and
8498 it is more efficient to use the pre-computed name.
8500 Something to keep in mind about this process: it is very
8501 unlikely, or in some cases downright impossible, to produce
8502 something that will match the mangled name of a function.
8503 If the definition of the function has the same debug info,
8504 we should be able to match up with it anyway. But fallbacks
8505 using the minimal symbol, for instance to find a method
8506 implemented in a stripped copy of libstdc++, will not work.
8507 If we do not have debug info for the definition, we will have to
8508 match them up some other way.
8510 When we do name matching there is a related problem with function
8511 templates; two instantiated function templates are allowed to
8512 differ only by their return types, which we do not add here. */
8514 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8516 struct attribute
*attr
;
8517 struct die_info
*child
;
8520 die
->building_fullname
= 1;
8522 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8526 const gdb_byte
*bytes
;
8527 struct dwarf2_locexpr_baton
*baton
;
8530 if (child
->tag
!= DW_TAG_template_type_param
8531 && child
->tag
!= DW_TAG_template_value_param
)
8536 fputs_unfiltered ("<", buf
);
8540 fputs_unfiltered (", ", buf
);
8542 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8545 complaint (&symfile_complaints
,
8546 _("template parameter missing DW_AT_type"));
8547 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8550 type
= die_type (child
, cu
);
8552 if (child
->tag
== DW_TAG_template_type_param
)
8554 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8558 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8561 complaint (&symfile_complaints
,
8562 _("template parameter missing "
8563 "DW_AT_const_value"));
8564 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8568 dwarf2_const_value_attr (attr
, type
, name
,
8569 &cu
->comp_unit_obstack
, cu
,
8570 &value
, &bytes
, &baton
);
8572 if (TYPE_NOSIGN (type
))
8573 /* GDB prints characters as NUMBER 'CHAR'. If that's
8574 changed, this can use value_print instead. */
8575 c_printchar (value
, type
, buf
);
8578 struct value_print_options opts
;
8581 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8585 else if (bytes
!= NULL
)
8587 v
= allocate_value (type
);
8588 memcpy (value_contents_writeable (v
), bytes
,
8589 TYPE_LENGTH (type
));
8592 v
= value_from_longest (type
, value
);
8594 /* Specify decimal so that we do not depend on
8596 get_formatted_print_options (&opts
, 'd');
8598 value_print (v
, buf
, &opts
);
8604 die
->building_fullname
= 0;
8608 /* Close the argument list, with a space if necessary
8609 (nested templates). */
8610 char last_char
= '\0';
8611 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8612 if (last_char
== '>')
8613 fputs_unfiltered (" >", buf
);
8615 fputs_unfiltered (">", buf
);
8619 /* For Java and C++ methods, append formal parameter type
8620 information, if PHYSNAME. */
8622 if (physname
&& die
->tag
== DW_TAG_subprogram
8623 && (cu
->language
== language_cplus
8624 || cu
->language
== language_java
))
8626 struct type
*type
= read_type_die (die
, cu
);
8628 c_type_print_args (type
, buf
, 1, cu
->language
,
8629 &type_print_raw_options
);
8631 if (cu
->language
== language_java
)
8633 /* For java, we must append the return type to method
8635 if (die
->tag
== DW_TAG_subprogram
)
8636 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8637 0, 0, &type_print_raw_options
);
8639 else if (cu
->language
== language_cplus
)
8641 /* Assume that an artificial first parameter is
8642 "this", but do not crash if it is not. RealView
8643 marks unnamed (and thus unused) parameters as
8644 artificial; there is no way to differentiate
8646 if (TYPE_NFIELDS (type
) > 0
8647 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8648 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8649 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8651 fputs_unfiltered (" const", buf
);
8655 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8656 ui_file_delete (buf
);
8658 if (cu
->language
== language_cplus
)
8660 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8661 &objfile
->per_bfd
->storage_obstack
);
8663 /* If we only computed INTERMEDIATE_NAME, or if
8664 INTERMEDIATE_NAME is already canonical, then we need to
8665 copy it to the appropriate obstack. */
8666 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8667 name
= ((const char *)
8668 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8670 strlen (intermediate_name
)));
8672 name
= canonical_name
;
8674 xfree (intermediate_name
);
8681 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8682 If scope qualifiers are appropriate they will be added. The result
8683 will be allocated on the storage_obstack, or NULL if the DIE does
8684 not have a name. NAME may either be from a previous call to
8685 dwarf2_name or NULL.
8687 The output string will be canonicalized (if C++/Java). */
8690 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8692 return dwarf2_compute_name (name
, die
, cu
, 0);
8695 /* Construct a physname for the given DIE in CU. NAME may either be
8696 from a previous call to dwarf2_name or NULL. The result will be
8697 allocated on the objfile_objstack or NULL if the DIE does not have a
8700 The output string will be canonicalized (if C++/Java). */
8703 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8705 struct objfile
*objfile
= cu
->objfile
;
8706 struct attribute
*attr
;
8707 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8708 struct cleanup
*back_to
;
8711 /* In this case dwarf2_compute_name is just a shortcut not building anything
8713 if (!die_needs_namespace (die
, cu
))
8714 return dwarf2_compute_name (name
, die
, cu
, 1);
8716 back_to
= make_cleanup (null_cleanup
, NULL
);
8718 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8719 if (mangled
== NULL
)
8720 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8722 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8724 if (mangled
!= NULL
)
8728 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8729 type. It is easier for GDB users to search for such functions as
8730 `name(params)' than `long name(params)'. In such case the minimal
8731 symbol names do not match the full symbol names but for template
8732 functions there is never a need to look up their definition from their
8733 declaration so the only disadvantage remains the minimal symbol
8734 variant `long name(params)' does not have the proper inferior type.
8737 if (cu
->language
== language_go
)
8739 /* This is a lie, but we already lie to the caller new_symbol_full.
8740 new_symbol_full assumes we return the mangled name.
8741 This just undoes that lie until things are cleaned up. */
8746 demangled
= gdb_demangle (mangled
,
8747 (DMGL_PARAMS
| DMGL_ANSI
8748 | (cu
->language
== language_java
8749 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8754 make_cleanup (xfree
, demangled
);
8764 if (canon
== NULL
|| check_physname
)
8766 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8768 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8770 /* It may not mean a bug in GDB. The compiler could also
8771 compute DW_AT_linkage_name incorrectly. But in such case
8772 GDB would need to be bug-to-bug compatible. */
8774 complaint (&symfile_complaints
,
8775 _("Computed physname <%s> does not match demangled <%s> "
8776 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8777 physname
, canon
, mangled
, die
->offset
.sect_off
,
8778 objfile_name (objfile
));
8780 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8781 is available here - over computed PHYSNAME. It is safer
8782 against both buggy GDB and buggy compilers. */
8796 retval
= ((const char *)
8797 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8798 retval
, strlen (retval
)));
8800 do_cleanups (back_to
);
8804 /* Inspect DIE in CU for a namespace alias. If one exists, record
8805 a new symbol for it.
8807 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8810 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8812 struct attribute
*attr
;
8814 /* If the die does not have a name, this is not a namespace
8816 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8820 struct die_info
*d
= die
;
8821 struct dwarf2_cu
*imported_cu
= cu
;
8823 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8824 keep inspecting DIEs until we hit the underlying import. */
8825 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8826 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8828 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8832 d
= follow_die_ref (d
, attr
, &imported_cu
);
8833 if (d
->tag
!= DW_TAG_imported_declaration
)
8837 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8839 complaint (&symfile_complaints
,
8840 _("DIE at 0x%x has too many recursively imported "
8841 "declarations"), d
->offset
.sect_off
);
8848 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8850 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8851 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8853 /* This declaration is a global namespace alias. Add
8854 a symbol for it whose type is the aliased namespace. */
8855 new_symbol (die
, type
, cu
);
8864 /* Return the using directives repository (global or local?) to use in the
8865 current context for LANGUAGE.
8867 For Ada, imported declarations can materialize renamings, which *may* be
8868 global. However it is impossible (for now?) in DWARF to distinguish
8869 "external" imported declarations and "static" ones. As all imported
8870 declarations seem to be static in all other languages, make them all CU-wide
8871 global only in Ada. */
8873 static struct using_direct
**
8874 using_directives (enum language language
)
8876 if (language
== language_ada
&& context_stack_depth
== 0)
8877 return &global_using_directives
;
8879 return &local_using_directives
;
8882 /* Read the import statement specified by the given die and record it. */
8885 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8887 struct objfile
*objfile
= cu
->objfile
;
8888 struct attribute
*import_attr
;
8889 struct die_info
*imported_die
, *child_die
;
8890 struct dwarf2_cu
*imported_cu
;
8891 const char *imported_name
;
8892 const char *imported_name_prefix
;
8893 const char *canonical_name
;
8894 const char *import_alias
;
8895 const char *imported_declaration
= NULL
;
8896 const char *import_prefix
;
8897 VEC (const_char_ptr
) *excludes
= NULL
;
8898 struct cleanup
*cleanups
;
8900 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8901 if (import_attr
== NULL
)
8903 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8904 dwarf_tag_name (die
->tag
));
8909 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8910 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8911 if (imported_name
== NULL
)
8913 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8915 The import in the following code:
8929 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8930 <52> DW_AT_decl_file : 1
8931 <53> DW_AT_decl_line : 6
8932 <54> DW_AT_import : <0x75>
8933 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8935 <5b> DW_AT_decl_file : 1
8936 <5c> DW_AT_decl_line : 2
8937 <5d> DW_AT_type : <0x6e>
8939 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8940 <76> DW_AT_byte_size : 4
8941 <77> DW_AT_encoding : 5 (signed)
8943 imports the wrong die ( 0x75 instead of 0x58 ).
8944 This case will be ignored until the gcc bug is fixed. */
8948 /* Figure out the local name after import. */
8949 import_alias
= dwarf2_name (die
, cu
);
8951 /* Figure out where the statement is being imported to. */
8952 import_prefix
= determine_prefix (die
, cu
);
8954 /* Figure out what the scope of the imported die is and prepend it
8955 to the name of the imported die. */
8956 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8958 if (imported_die
->tag
!= DW_TAG_namespace
8959 && imported_die
->tag
!= DW_TAG_module
)
8961 imported_declaration
= imported_name
;
8962 canonical_name
= imported_name_prefix
;
8964 else if (strlen (imported_name_prefix
) > 0)
8965 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8966 imported_name_prefix
,
8967 (cu
->language
== language_d
? "." : "::"),
8968 imported_name
, (char *) NULL
);
8970 canonical_name
= imported_name
;
8972 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8974 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8975 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8976 child_die
= sibling_die (child_die
))
8978 /* DWARF-4: A Fortran use statement with a “rename list” may be
8979 represented by an imported module entry with an import attribute
8980 referring to the module and owned entries corresponding to those
8981 entities that are renamed as part of being imported. */
8983 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8985 complaint (&symfile_complaints
,
8986 _("child DW_TAG_imported_declaration expected "
8987 "- DIE at 0x%x [in module %s]"),
8988 child_die
->offset
.sect_off
, objfile_name (objfile
));
8992 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8993 if (import_attr
== NULL
)
8995 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8996 dwarf_tag_name (child_die
->tag
));
9001 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9003 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9004 if (imported_name
== NULL
)
9006 complaint (&symfile_complaints
,
9007 _("child DW_TAG_imported_declaration has unknown "
9008 "imported name - DIE at 0x%x [in module %s]"),
9009 child_die
->offset
.sect_off
, objfile_name (objfile
));
9013 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9015 process_die (child_die
, cu
);
9018 add_using_directive (using_directives (cu
->language
),
9022 imported_declaration
,
9025 &objfile
->objfile_obstack
);
9027 do_cleanups (cleanups
);
9030 /* Cleanup function for handle_DW_AT_stmt_list. */
9033 free_cu_line_header (void *arg
)
9035 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9037 free_line_header (cu
->line_header
);
9038 cu
->line_header
= NULL
;
9041 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9042 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9043 this, it was first present in GCC release 4.3.0. */
9046 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9048 if (!cu
->checked_producer
)
9049 check_producer (cu
);
9051 return cu
->producer_is_gcc_lt_4_3
;
9055 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9056 const char **name
, const char **comp_dir
)
9058 /* Find the filename. Do not use dwarf2_name here, since the filename
9059 is not a source language identifier. */
9060 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9061 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9063 if (*comp_dir
== NULL
9064 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9065 && IS_ABSOLUTE_PATH (*name
))
9067 char *d
= ldirname (*name
);
9071 make_cleanup (xfree
, d
);
9073 if (*comp_dir
!= NULL
)
9075 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9076 directory, get rid of it. */
9077 char *cp
= strchr (*comp_dir
, ':');
9079 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9084 *name
= "<unknown>";
9087 /* Handle DW_AT_stmt_list for a compilation unit.
9088 DIE is the DW_TAG_compile_unit die for CU.
9089 COMP_DIR is the compilation directory. LOWPC is passed to
9090 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9093 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9094 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9096 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9097 struct attribute
*attr
;
9098 unsigned int line_offset
;
9099 struct line_header line_header_local
;
9100 hashval_t line_header_local_hash
;
9105 gdb_assert (! cu
->per_cu
->is_debug_types
);
9107 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9111 line_offset
= DW_UNSND (attr
);
9113 /* The line header hash table is only created if needed (it exists to
9114 prevent redundant reading of the line table for partial_units).
9115 If we're given a partial_unit, we'll need it. If we're given a
9116 compile_unit, then use the line header hash table if it's already
9117 created, but don't create one just yet. */
9119 if (dwarf2_per_objfile
->line_header_hash
== NULL
9120 && die
->tag
== DW_TAG_partial_unit
)
9122 dwarf2_per_objfile
->line_header_hash
9123 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9124 line_header_eq_voidp
,
9125 free_line_header_voidp
,
9126 &objfile
->objfile_obstack
,
9127 hashtab_obstack_allocate
,
9128 dummy_obstack_deallocate
);
9131 line_header_local
.offset
.sect_off
= line_offset
;
9132 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9133 line_header_local_hash
= line_header_hash (&line_header_local
);
9134 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9136 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9138 line_header_local_hash
, NO_INSERT
);
9140 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9141 is not present in *SLOT (since if there is something in *SLOT then
9142 it will be for a partial_unit). */
9143 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9145 gdb_assert (*slot
!= NULL
);
9146 cu
->line_header
= (struct line_header
*) *slot
;
9151 /* dwarf_decode_line_header does not yet provide sufficient information.
9152 We always have to call also dwarf_decode_lines for it. */
9153 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9154 if (cu
->line_header
== NULL
)
9157 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9161 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9163 line_header_local_hash
, INSERT
);
9164 gdb_assert (slot
!= NULL
);
9166 if (slot
!= NULL
&& *slot
== NULL
)
9168 /* This newly decoded line number information unit will be owned
9169 by line_header_hash hash table. */
9170 *slot
= cu
->line_header
;
9174 /* We cannot free any current entry in (*slot) as that struct line_header
9175 may be already used by multiple CUs. Create only temporary decoded
9176 line_header for this CU - it may happen at most once for each line
9177 number information unit. And if we're not using line_header_hash
9178 then this is what we want as well. */
9179 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9180 make_cleanup (free_cu_line_header
, cu
);
9182 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9183 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9187 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9190 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9192 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9193 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9194 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9195 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9196 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9197 struct attribute
*attr
;
9198 const char *name
= NULL
;
9199 const char *comp_dir
= NULL
;
9200 struct die_info
*child_die
;
9201 bfd
*abfd
= objfile
->obfd
;
9204 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9206 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9208 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9209 from finish_block. */
9210 if (lowpc
== ((CORE_ADDR
) -1))
9212 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9214 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9216 prepare_one_comp_unit (cu
, die
, cu
->language
);
9218 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9219 standardised yet. As a workaround for the language detection we fall
9220 back to the DW_AT_producer string. */
9221 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9222 cu
->language
= language_opencl
;
9224 /* Similar hack for Go. */
9225 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9226 set_cu_language (DW_LANG_Go
, cu
);
9228 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9230 /* Decode line number information if present. We do this before
9231 processing child DIEs, so that the line header table is available
9232 for DW_AT_decl_file. */
9233 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9235 /* Process all dies in compilation unit. */
9236 if (die
->child
!= NULL
)
9238 child_die
= die
->child
;
9239 while (child_die
&& child_die
->tag
)
9241 process_die (child_die
, cu
);
9242 child_die
= sibling_die (child_die
);
9246 /* Decode macro information, if present. Dwarf 2 macro information
9247 refers to information in the line number info statement program
9248 header, so we can only read it if we've read the header
9250 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9251 if (attr
&& cu
->line_header
)
9253 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9254 complaint (&symfile_complaints
,
9255 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9257 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9261 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9262 if (attr
&& cu
->line_header
)
9264 unsigned int macro_offset
= DW_UNSND (attr
);
9266 dwarf_decode_macros (cu
, macro_offset
, 0);
9270 do_cleanups (back_to
);
9273 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9274 Create the set of symtabs used by this TU, or if this TU is sharing
9275 symtabs with another TU and the symtabs have already been created
9276 then restore those symtabs in the line header.
9277 We don't need the pc/line-number mapping for type units. */
9280 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9282 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9283 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9284 struct type_unit_group
*tu_group
;
9286 struct line_header
*lh
;
9287 struct attribute
*attr
;
9288 unsigned int i
, line_offset
;
9289 struct signatured_type
*sig_type
;
9291 gdb_assert (per_cu
->is_debug_types
);
9292 sig_type
= (struct signatured_type
*) per_cu
;
9294 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9296 /* If we're using .gdb_index (includes -readnow) then
9297 per_cu->type_unit_group may not have been set up yet. */
9298 if (sig_type
->type_unit_group
== NULL
)
9299 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9300 tu_group
= sig_type
->type_unit_group
;
9302 /* If we've already processed this stmt_list there's no real need to
9303 do it again, we could fake it and just recreate the part we need
9304 (file name,index -> symtab mapping). If data shows this optimization
9305 is useful we can do it then. */
9306 first_time
= tu_group
->compunit_symtab
== NULL
;
9308 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9313 line_offset
= DW_UNSND (attr
);
9314 lh
= dwarf_decode_line_header (line_offset
, cu
);
9319 dwarf2_start_symtab (cu
, "", NULL
, 0);
9322 gdb_assert (tu_group
->symtabs
== NULL
);
9323 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9328 cu
->line_header
= lh
;
9329 make_cleanup (free_cu_line_header
, cu
);
9333 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9335 tu_group
->num_symtabs
= lh
->num_file_names
;
9336 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9338 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9340 const char *dir
= NULL
;
9341 struct file_entry
*fe
= &lh
->file_names
[i
];
9343 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9344 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9345 dwarf2_start_subfile (fe
->name
, dir
);
9347 if (current_subfile
->symtab
== NULL
)
9349 /* NOTE: start_subfile will recognize when it's been passed
9350 a file it has already seen. So we can't assume there's a
9351 simple mapping from lh->file_names to subfiles, plus
9352 lh->file_names may contain dups. */
9353 current_subfile
->symtab
9354 = allocate_symtab (cust
, current_subfile
->name
);
9357 fe
->symtab
= current_subfile
->symtab
;
9358 tu_group
->symtabs
[i
] = fe
->symtab
;
9363 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9365 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9367 struct file_entry
*fe
= &lh
->file_names
[i
];
9369 fe
->symtab
= tu_group
->symtabs
[i
];
9373 /* The main symtab is allocated last. Type units don't have DW_AT_name
9374 so they don't have a "real" (so to speak) symtab anyway.
9375 There is later code that will assign the main symtab to all symbols
9376 that don't have one. We need to handle the case of a symbol with a
9377 missing symtab (DW_AT_decl_file) anyway. */
9380 /* Process DW_TAG_type_unit.
9381 For TUs we want to skip the first top level sibling if it's not the
9382 actual type being defined by this TU. In this case the first top
9383 level sibling is there to provide context only. */
9386 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9388 struct die_info
*child_die
;
9390 prepare_one_comp_unit (cu
, die
, language_minimal
);
9392 /* Initialize (or reinitialize) the machinery for building symtabs.
9393 We do this before processing child DIEs, so that the line header table
9394 is available for DW_AT_decl_file. */
9395 setup_type_unit_groups (die
, cu
);
9397 if (die
->child
!= NULL
)
9399 child_die
= die
->child
;
9400 while (child_die
&& child_die
->tag
)
9402 process_die (child_die
, cu
);
9403 child_die
= sibling_die (child_die
);
9410 http://gcc.gnu.org/wiki/DebugFission
9411 http://gcc.gnu.org/wiki/DebugFissionDWP
9413 To simplify handling of both DWO files ("object" files with the DWARF info)
9414 and DWP files (a file with the DWOs packaged up into one file), we treat
9415 DWP files as having a collection of virtual DWO files. */
9418 hash_dwo_file (const void *item
)
9420 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9423 hash
= htab_hash_string (dwo_file
->dwo_name
);
9424 if (dwo_file
->comp_dir
!= NULL
)
9425 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9430 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9432 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9433 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9435 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9437 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9438 return lhs
->comp_dir
== rhs
->comp_dir
;
9439 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9442 /* Allocate a hash table for DWO files. */
9445 allocate_dwo_file_hash_table (void)
9447 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9449 return htab_create_alloc_ex (41,
9453 &objfile
->objfile_obstack
,
9454 hashtab_obstack_allocate
,
9455 dummy_obstack_deallocate
);
9458 /* Lookup DWO file DWO_NAME. */
9461 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9463 struct dwo_file find_entry
;
9466 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9467 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9469 memset (&find_entry
, 0, sizeof (find_entry
));
9470 find_entry
.dwo_name
= dwo_name
;
9471 find_entry
.comp_dir
= comp_dir
;
9472 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9478 hash_dwo_unit (const void *item
)
9480 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9482 /* This drops the top 32 bits of the id, but is ok for a hash. */
9483 return dwo_unit
->signature
;
9487 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9489 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9490 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9492 /* The signature is assumed to be unique within the DWO file.
9493 So while object file CU dwo_id's always have the value zero,
9494 that's OK, assuming each object file DWO file has only one CU,
9495 and that's the rule for now. */
9496 return lhs
->signature
== rhs
->signature
;
9499 /* Allocate a hash table for DWO CUs,TUs.
9500 There is one of these tables for each of CUs,TUs for each DWO file. */
9503 allocate_dwo_unit_table (struct objfile
*objfile
)
9505 /* Start out with a pretty small number.
9506 Generally DWO files contain only one CU and maybe some TUs. */
9507 return htab_create_alloc_ex (3,
9511 &objfile
->objfile_obstack
,
9512 hashtab_obstack_allocate
,
9513 dummy_obstack_deallocate
);
9516 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9518 struct create_dwo_cu_data
9520 struct dwo_file
*dwo_file
;
9521 struct dwo_unit dwo_unit
;
9524 /* die_reader_func for create_dwo_cu. */
9527 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9528 const gdb_byte
*info_ptr
,
9529 struct die_info
*comp_unit_die
,
9533 struct dwarf2_cu
*cu
= reader
->cu
;
9534 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9535 sect_offset offset
= cu
->per_cu
->offset
;
9536 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9537 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9538 struct dwo_file
*dwo_file
= data
->dwo_file
;
9539 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9540 struct attribute
*attr
;
9542 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9545 complaint (&symfile_complaints
,
9546 _("Dwarf Error: debug entry at offset 0x%x is missing"
9547 " its dwo_id [in module %s]"),
9548 offset
.sect_off
, dwo_file
->dwo_name
);
9552 dwo_unit
->dwo_file
= dwo_file
;
9553 dwo_unit
->signature
= DW_UNSND (attr
);
9554 dwo_unit
->section
= section
;
9555 dwo_unit
->offset
= offset
;
9556 dwo_unit
->length
= cu
->per_cu
->length
;
9558 if (dwarf_read_debug
)
9559 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9560 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9563 /* Create the dwo_unit for the lone CU in DWO_FILE.
9564 Note: This function processes DWO files only, not DWP files. */
9566 static struct dwo_unit
*
9567 create_dwo_cu (struct dwo_file
*dwo_file
)
9569 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9570 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9573 const gdb_byte
*info_ptr
, *end_ptr
;
9574 struct create_dwo_cu_data create_dwo_cu_data
;
9575 struct dwo_unit
*dwo_unit
;
9577 dwarf2_read_section (objfile
, section
);
9578 info_ptr
= section
->buffer
;
9580 if (info_ptr
== NULL
)
9583 /* We can't set abfd until now because the section may be empty or
9584 not present, in which case section->asection will be NULL. */
9585 abfd
= get_section_bfd_owner (section
);
9587 if (dwarf_read_debug
)
9589 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9590 get_section_name (section
),
9591 get_section_file_name (section
));
9594 create_dwo_cu_data
.dwo_file
= dwo_file
;
9597 end_ptr
= info_ptr
+ section
->size
;
9598 while (info_ptr
< end_ptr
)
9600 struct dwarf2_per_cu_data per_cu
;
9602 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9603 sizeof (create_dwo_cu_data
.dwo_unit
));
9604 memset (&per_cu
, 0, sizeof (per_cu
));
9605 per_cu
.objfile
= objfile
;
9606 per_cu
.is_debug_types
= 0;
9607 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9608 per_cu
.section
= section
;
9610 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9611 create_dwo_cu_reader
,
9612 &create_dwo_cu_data
);
9614 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9616 /* If we've already found one, complain. We only support one
9617 because having more than one requires hacking the dwo_name of
9618 each to match, which is highly unlikely to happen. */
9619 if (dwo_unit
!= NULL
)
9621 complaint (&symfile_complaints
,
9622 _("Multiple CUs in DWO file %s [in module %s]"),
9623 dwo_file
->dwo_name
, objfile_name (objfile
));
9627 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9628 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9631 info_ptr
+= per_cu
.length
;
9637 /* DWP file .debug_{cu,tu}_index section format:
9638 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9642 Both index sections have the same format, and serve to map a 64-bit
9643 signature to a set of section numbers. Each section begins with a header,
9644 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9645 indexes, and a pool of 32-bit section numbers. The index sections will be
9646 aligned at 8-byte boundaries in the file.
9648 The index section header consists of:
9650 V, 32 bit version number
9652 N, 32 bit number of compilation units or type units in the index
9653 M, 32 bit number of slots in the hash table
9655 Numbers are recorded using the byte order of the application binary.
9657 The hash table begins at offset 16 in the section, and consists of an array
9658 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9659 order of the application binary). Unused slots in the hash table are 0.
9660 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9662 The parallel table begins immediately after the hash table
9663 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9664 array of 32-bit indexes (using the byte order of the application binary),
9665 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9666 table contains a 32-bit index into the pool of section numbers. For unused
9667 hash table slots, the corresponding entry in the parallel table will be 0.
9669 The pool of section numbers begins immediately following the hash table
9670 (at offset 16 + 12 * M from the beginning of the section). The pool of
9671 section numbers consists of an array of 32-bit words (using the byte order
9672 of the application binary). Each item in the array is indexed starting
9673 from 0. The hash table entry provides the index of the first section
9674 number in the set. Additional section numbers in the set follow, and the
9675 set is terminated by a 0 entry (section number 0 is not used in ELF).
9677 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9678 section must be the first entry in the set, and the .debug_abbrev.dwo must
9679 be the second entry. Other members of the set may follow in any order.
9685 DWP Version 2 combines all the .debug_info, etc. sections into one,
9686 and the entries in the index tables are now offsets into these sections.
9687 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9690 Index Section Contents:
9692 Hash Table of Signatures dwp_hash_table.hash_table
9693 Parallel Table of Indices dwp_hash_table.unit_table
9694 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9695 Table of Section Sizes dwp_hash_table.v2.sizes
9697 The index section header consists of:
9699 V, 32 bit version number
9700 L, 32 bit number of columns in the table of section offsets
9701 N, 32 bit number of compilation units or type units in the index
9702 M, 32 bit number of slots in the hash table
9704 Numbers are recorded using the byte order of the application binary.
9706 The hash table has the same format as version 1.
9707 The parallel table of indices has the same format as version 1,
9708 except that the entries are origin-1 indices into the table of sections
9709 offsets and the table of section sizes.
9711 The table of offsets begins immediately following the parallel table
9712 (at offset 16 + 12 * M from the beginning of the section). The table is
9713 a two-dimensional array of 32-bit words (using the byte order of the
9714 application binary), with L columns and N+1 rows, in row-major order.
9715 Each row in the array is indexed starting from 0. The first row provides
9716 a key to the remaining rows: each column in this row provides an identifier
9717 for a debug section, and the offsets in the same column of subsequent rows
9718 refer to that section. The section identifiers are:
9720 DW_SECT_INFO 1 .debug_info.dwo
9721 DW_SECT_TYPES 2 .debug_types.dwo
9722 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9723 DW_SECT_LINE 4 .debug_line.dwo
9724 DW_SECT_LOC 5 .debug_loc.dwo
9725 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9726 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9727 DW_SECT_MACRO 8 .debug_macro.dwo
9729 The offsets provided by the CU and TU index sections are the base offsets
9730 for the contributions made by each CU or TU to the corresponding section
9731 in the package file. Each CU and TU header contains an abbrev_offset
9732 field, used to find the abbreviations table for that CU or TU within the
9733 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9734 be interpreted as relative to the base offset given in the index section.
9735 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9736 should be interpreted as relative to the base offset for .debug_line.dwo,
9737 and offsets into other debug sections obtained from DWARF attributes should
9738 also be interpreted as relative to the corresponding base offset.
9740 The table of sizes begins immediately following the table of offsets.
9741 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9742 with L columns and N rows, in row-major order. Each row in the array is
9743 indexed starting from 1 (row 0 is shared by the two tables).
9747 Hash table lookup is handled the same in version 1 and 2:
9749 We assume that N and M will not exceed 2^32 - 1.
9750 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9752 Given a 64-bit compilation unit signature or a type signature S, an entry
9753 in the hash table is located as follows:
9755 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9756 the low-order k bits all set to 1.
9758 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9760 3) If the hash table entry at index H matches the signature, use that
9761 entry. If the hash table entry at index H is unused (all zeroes),
9762 terminate the search: the signature is not present in the table.
9764 4) Let H = (H + H') modulo M. Repeat at Step 3.
9766 Because M > N and H' and M are relatively prime, the search is guaranteed
9767 to stop at an unused slot or find the match. */
9769 /* Create a hash table to map DWO IDs to their CU/TU entry in
9770 .debug_{info,types}.dwo in DWP_FILE.
9771 Returns NULL if there isn't one.
9772 Note: This function processes DWP files only, not DWO files. */
9774 static struct dwp_hash_table
*
9775 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9777 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9778 bfd
*dbfd
= dwp_file
->dbfd
;
9779 const gdb_byte
*index_ptr
, *index_end
;
9780 struct dwarf2_section_info
*index
;
9781 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9782 struct dwp_hash_table
*htab
;
9785 index
= &dwp_file
->sections
.tu_index
;
9787 index
= &dwp_file
->sections
.cu_index
;
9789 if (dwarf2_section_empty_p (index
))
9791 dwarf2_read_section (objfile
, index
);
9793 index_ptr
= index
->buffer
;
9794 index_end
= index_ptr
+ index
->size
;
9796 version
= read_4_bytes (dbfd
, index_ptr
);
9799 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9803 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9805 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9808 if (version
!= 1 && version
!= 2)
9810 error (_("Dwarf Error: unsupported DWP file version (%s)"
9812 pulongest (version
), dwp_file
->name
);
9814 if (nr_slots
!= (nr_slots
& -nr_slots
))
9816 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9817 " is not power of 2 [in module %s]"),
9818 pulongest (nr_slots
), dwp_file
->name
);
9821 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9822 htab
->version
= version
;
9823 htab
->nr_columns
= nr_columns
;
9824 htab
->nr_units
= nr_units
;
9825 htab
->nr_slots
= nr_slots
;
9826 htab
->hash_table
= index_ptr
;
9827 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9829 /* Exit early if the table is empty. */
9830 if (nr_slots
== 0 || nr_units
== 0
9831 || (version
== 2 && nr_columns
== 0))
9833 /* All must be zero. */
9834 if (nr_slots
!= 0 || nr_units
!= 0
9835 || (version
== 2 && nr_columns
!= 0))
9837 complaint (&symfile_complaints
,
9838 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9839 " all zero [in modules %s]"),
9847 htab
->section_pool
.v1
.indices
=
9848 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9849 /* It's harder to decide whether the section is too small in v1.
9850 V1 is deprecated anyway so we punt. */
9854 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9855 int *ids
= htab
->section_pool
.v2
.section_ids
;
9856 /* Reverse map for error checking. */
9857 int ids_seen
[DW_SECT_MAX
+ 1];
9862 error (_("Dwarf Error: bad DWP hash table, too few columns"
9863 " in section table [in module %s]"),
9866 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9868 error (_("Dwarf Error: bad DWP hash table, too many columns"
9869 " in section table [in module %s]"),
9872 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9873 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9874 for (i
= 0; i
< nr_columns
; ++i
)
9876 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9878 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9880 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9881 " in section table [in module %s]"),
9882 id
, dwp_file
->name
);
9884 if (ids_seen
[id
] != -1)
9886 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9887 " id %d in section table [in module %s]"),
9888 id
, dwp_file
->name
);
9893 /* Must have exactly one info or types section. */
9894 if (((ids_seen
[DW_SECT_INFO
] != -1)
9895 + (ids_seen
[DW_SECT_TYPES
] != -1))
9898 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9899 " DWO info/types section [in module %s]"),
9902 /* Must have an abbrev section. */
9903 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9905 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9906 " section [in module %s]"),
9909 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9910 htab
->section_pool
.v2
.sizes
=
9911 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9912 * nr_units
* nr_columns
);
9913 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9914 * nr_units
* nr_columns
))
9917 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9926 /* Update SECTIONS with the data from SECTP.
9928 This function is like the other "locate" section routines that are
9929 passed to bfd_map_over_sections, but in this context the sections to
9930 read comes from the DWP V1 hash table, not the full ELF section table.
9932 The result is non-zero for success, or zero if an error was found. */
9935 locate_v1_virtual_dwo_sections (asection
*sectp
,
9936 struct virtual_v1_dwo_sections
*sections
)
9938 const struct dwop_section_names
*names
= &dwop_section_names
;
9940 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9942 /* There can be only one. */
9943 if (sections
->abbrev
.s
.section
!= NULL
)
9945 sections
->abbrev
.s
.section
= sectp
;
9946 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9948 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9949 || section_is_p (sectp
->name
, &names
->types_dwo
))
9951 /* There can be only one. */
9952 if (sections
->info_or_types
.s
.section
!= NULL
)
9954 sections
->info_or_types
.s
.section
= sectp
;
9955 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9957 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9959 /* There can be only one. */
9960 if (sections
->line
.s
.section
!= NULL
)
9962 sections
->line
.s
.section
= sectp
;
9963 sections
->line
.size
= bfd_get_section_size (sectp
);
9965 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9967 /* There can be only one. */
9968 if (sections
->loc
.s
.section
!= NULL
)
9970 sections
->loc
.s
.section
= sectp
;
9971 sections
->loc
.size
= bfd_get_section_size (sectp
);
9973 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9975 /* There can be only one. */
9976 if (sections
->macinfo
.s
.section
!= NULL
)
9978 sections
->macinfo
.s
.section
= sectp
;
9979 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9981 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9983 /* There can be only one. */
9984 if (sections
->macro
.s
.section
!= NULL
)
9986 sections
->macro
.s
.section
= sectp
;
9987 sections
->macro
.size
= bfd_get_section_size (sectp
);
9989 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9991 /* There can be only one. */
9992 if (sections
->str_offsets
.s
.section
!= NULL
)
9994 sections
->str_offsets
.s
.section
= sectp
;
9995 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9999 /* No other kind of section is valid. */
10006 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10007 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10008 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10009 This is for DWP version 1 files. */
10011 static struct dwo_unit
*
10012 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10013 uint32_t unit_index
,
10014 const char *comp_dir
,
10015 ULONGEST signature
, int is_debug_types
)
10017 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10018 const struct dwp_hash_table
*dwp_htab
=
10019 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10020 bfd
*dbfd
= dwp_file
->dbfd
;
10021 const char *kind
= is_debug_types
? "TU" : "CU";
10022 struct dwo_file
*dwo_file
;
10023 struct dwo_unit
*dwo_unit
;
10024 struct virtual_v1_dwo_sections sections
;
10025 void **dwo_file_slot
;
10026 char *virtual_dwo_name
;
10027 struct dwarf2_section_info
*cutu
;
10028 struct cleanup
*cleanups
;
10031 gdb_assert (dwp_file
->version
== 1);
10033 if (dwarf_read_debug
)
10035 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10037 pulongest (unit_index
), hex_string (signature
),
10041 /* Fetch the sections of this DWO unit.
10042 Put a limit on the number of sections we look for so that bad data
10043 doesn't cause us to loop forever. */
10045 #define MAX_NR_V1_DWO_SECTIONS \
10046 (1 /* .debug_info or .debug_types */ \
10047 + 1 /* .debug_abbrev */ \
10048 + 1 /* .debug_line */ \
10049 + 1 /* .debug_loc */ \
10050 + 1 /* .debug_str_offsets */ \
10051 + 1 /* .debug_macro or .debug_macinfo */ \
10052 + 1 /* trailing zero */)
10054 memset (§ions
, 0, sizeof (sections
));
10055 cleanups
= make_cleanup (null_cleanup
, 0);
10057 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10060 uint32_t section_nr
=
10061 read_4_bytes (dbfd
,
10062 dwp_htab
->section_pool
.v1
.indices
10063 + (unit_index
+ i
) * sizeof (uint32_t));
10065 if (section_nr
== 0)
10067 if (section_nr
>= dwp_file
->num_sections
)
10069 error (_("Dwarf Error: bad DWP hash table, section number too large"
10070 " [in module %s]"),
10074 sectp
= dwp_file
->elf_sections
[section_nr
];
10075 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10077 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10078 " [in module %s]"),
10084 || dwarf2_section_empty_p (§ions
.info_or_types
)
10085 || dwarf2_section_empty_p (§ions
.abbrev
))
10087 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10088 " [in module %s]"),
10091 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10093 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10094 " [in module %s]"),
10098 /* It's easier for the rest of the code if we fake a struct dwo_file and
10099 have dwo_unit "live" in that. At least for now.
10101 The DWP file can be made up of a random collection of CUs and TUs.
10102 However, for each CU + set of TUs that came from the same original DWO
10103 file, we can combine them back into a virtual DWO file to save space
10104 (fewer struct dwo_file objects to allocate). Remember that for really
10105 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10108 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10109 get_section_id (§ions
.abbrev
),
10110 get_section_id (§ions
.line
),
10111 get_section_id (§ions
.loc
),
10112 get_section_id (§ions
.str_offsets
));
10113 make_cleanup (xfree
, virtual_dwo_name
);
10114 /* Can we use an existing virtual DWO file? */
10115 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10116 /* Create one if necessary. */
10117 if (*dwo_file_slot
== NULL
)
10119 if (dwarf_read_debug
)
10121 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10124 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10126 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10128 strlen (virtual_dwo_name
));
10129 dwo_file
->comp_dir
= comp_dir
;
10130 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10131 dwo_file
->sections
.line
= sections
.line
;
10132 dwo_file
->sections
.loc
= sections
.loc
;
10133 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10134 dwo_file
->sections
.macro
= sections
.macro
;
10135 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10136 /* The "str" section is global to the entire DWP file. */
10137 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10138 /* The info or types section is assigned below to dwo_unit,
10139 there's no need to record it in dwo_file.
10140 Also, we can't simply record type sections in dwo_file because
10141 we record a pointer into the vector in dwo_unit. As we collect more
10142 types we'll grow the vector and eventually have to reallocate space
10143 for it, invalidating all copies of pointers into the previous
10145 *dwo_file_slot
= dwo_file
;
10149 if (dwarf_read_debug
)
10151 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10154 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10156 do_cleanups (cleanups
);
10158 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10159 dwo_unit
->dwo_file
= dwo_file
;
10160 dwo_unit
->signature
= signature
;
10161 dwo_unit
->section
=
10162 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10163 *dwo_unit
->section
= sections
.info_or_types
;
10164 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10169 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10170 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10171 piece within that section used by a TU/CU, return a virtual section
10172 of just that piece. */
10174 static struct dwarf2_section_info
10175 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10176 bfd_size_type offset
, bfd_size_type size
)
10178 struct dwarf2_section_info result
;
10181 gdb_assert (section
!= NULL
);
10182 gdb_assert (!section
->is_virtual
);
10184 memset (&result
, 0, sizeof (result
));
10185 result
.s
.containing_section
= section
;
10186 result
.is_virtual
= 1;
10191 sectp
= get_section_bfd_section (section
);
10193 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10194 bounds of the real section. This is a pretty-rare event, so just
10195 flag an error (easier) instead of a warning and trying to cope. */
10197 || offset
+ size
> bfd_get_section_size (sectp
))
10199 bfd
*abfd
= sectp
->owner
;
10201 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10202 " in section %s [in module %s]"),
10203 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10204 objfile_name (dwarf2_per_objfile
->objfile
));
10207 result
.virtual_offset
= offset
;
10208 result
.size
= size
;
10212 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10213 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10214 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10215 This is for DWP version 2 files. */
10217 static struct dwo_unit
*
10218 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10219 uint32_t unit_index
,
10220 const char *comp_dir
,
10221 ULONGEST signature
, int is_debug_types
)
10223 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10224 const struct dwp_hash_table
*dwp_htab
=
10225 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10226 bfd
*dbfd
= dwp_file
->dbfd
;
10227 const char *kind
= is_debug_types
? "TU" : "CU";
10228 struct dwo_file
*dwo_file
;
10229 struct dwo_unit
*dwo_unit
;
10230 struct virtual_v2_dwo_sections sections
;
10231 void **dwo_file_slot
;
10232 char *virtual_dwo_name
;
10233 struct dwarf2_section_info
*cutu
;
10234 struct cleanup
*cleanups
;
10237 gdb_assert (dwp_file
->version
== 2);
10239 if (dwarf_read_debug
)
10241 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10243 pulongest (unit_index
), hex_string (signature
),
10247 /* Fetch the section offsets of this DWO unit. */
10249 memset (§ions
, 0, sizeof (sections
));
10250 cleanups
= make_cleanup (null_cleanup
, 0);
10252 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10254 uint32_t offset
= read_4_bytes (dbfd
,
10255 dwp_htab
->section_pool
.v2
.offsets
10256 + (((unit_index
- 1) * dwp_htab
->nr_columns
10258 * sizeof (uint32_t)));
10259 uint32_t size
= read_4_bytes (dbfd
,
10260 dwp_htab
->section_pool
.v2
.sizes
10261 + (((unit_index
- 1) * dwp_htab
->nr_columns
10263 * sizeof (uint32_t)));
10265 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10268 case DW_SECT_TYPES
:
10269 sections
.info_or_types_offset
= offset
;
10270 sections
.info_or_types_size
= size
;
10272 case DW_SECT_ABBREV
:
10273 sections
.abbrev_offset
= offset
;
10274 sections
.abbrev_size
= size
;
10277 sections
.line_offset
= offset
;
10278 sections
.line_size
= size
;
10281 sections
.loc_offset
= offset
;
10282 sections
.loc_size
= size
;
10284 case DW_SECT_STR_OFFSETS
:
10285 sections
.str_offsets_offset
= offset
;
10286 sections
.str_offsets_size
= size
;
10288 case DW_SECT_MACINFO
:
10289 sections
.macinfo_offset
= offset
;
10290 sections
.macinfo_size
= size
;
10292 case DW_SECT_MACRO
:
10293 sections
.macro_offset
= offset
;
10294 sections
.macro_size
= size
;
10299 /* It's easier for the rest of the code if we fake a struct dwo_file and
10300 have dwo_unit "live" in that. At least for now.
10302 The DWP file can be made up of a random collection of CUs and TUs.
10303 However, for each CU + set of TUs that came from the same original DWO
10304 file, we can combine them back into a virtual DWO file to save space
10305 (fewer struct dwo_file objects to allocate). Remember that for really
10306 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10309 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10310 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10311 (long) (sections
.line_size
? sections
.line_offset
: 0),
10312 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10313 (long) (sections
.str_offsets_size
10314 ? sections
.str_offsets_offset
: 0));
10315 make_cleanup (xfree
, virtual_dwo_name
);
10316 /* Can we use an existing virtual DWO file? */
10317 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10318 /* Create one if necessary. */
10319 if (*dwo_file_slot
== NULL
)
10321 if (dwarf_read_debug
)
10323 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10326 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10328 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10330 strlen (virtual_dwo_name
));
10331 dwo_file
->comp_dir
= comp_dir
;
10332 dwo_file
->sections
.abbrev
=
10333 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10334 sections
.abbrev_offset
, sections
.abbrev_size
);
10335 dwo_file
->sections
.line
=
10336 create_dwp_v2_section (&dwp_file
->sections
.line
,
10337 sections
.line_offset
, sections
.line_size
);
10338 dwo_file
->sections
.loc
=
10339 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10340 sections
.loc_offset
, sections
.loc_size
);
10341 dwo_file
->sections
.macinfo
=
10342 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10343 sections
.macinfo_offset
, sections
.macinfo_size
);
10344 dwo_file
->sections
.macro
=
10345 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10346 sections
.macro_offset
, sections
.macro_size
);
10347 dwo_file
->sections
.str_offsets
=
10348 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10349 sections
.str_offsets_offset
,
10350 sections
.str_offsets_size
);
10351 /* The "str" section is global to the entire DWP file. */
10352 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10353 /* The info or types section is assigned below to dwo_unit,
10354 there's no need to record it in dwo_file.
10355 Also, we can't simply record type sections in dwo_file because
10356 we record a pointer into the vector in dwo_unit. As we collect more
10357 types we'll grow the vector and eventually have to reallocate space
10358 for it, invalidating all copies of pointers into the previous
10360 *dwo_file_slot
= dwo_file
;
10364 if (dwarf_read_debug
)
10366 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10369 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10371 do_cleanups (cleanups
);
10373 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10374 dwo_unit
->dwo_file
= dwo_file
;
10375 dwo_unit
->signature
= signature
;
10376 dwo_unit
->section
=
10377 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10378 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10379 ? &dwp_file
->sections
.types
10380 : &dwp_file
->sections
.info
,
10381 sections
.info_or_types_offset
,
10382 sections
.info_or_types_size
);
10383 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10388 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10389 Returns NULL if the signature isn't found. */
10391 static struct dwo_unit
*
10392 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10393 ULONGEST signature
, int is_debug_types
)
10395 const struct dwp_hash_table
*dwp_htab
=
10396 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10397 bfd
*dbfd
= dwp_file
->dbfd
;
10398 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10399 uint32_t hash
= signature
& mask
;
10400 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10403 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10405 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10406 find_dwo_cu
.signature
= signature
;
10407 slot
= htab_find_slot (is_debug_types
10408 ? dwp_file
->loaded_tus
10409 : dwp_file
->loaded_cus
,
10410 &find_dwo_cu
, INSERT
);
10413 return (struct dwo_unit
*) *slot
;
10415 /* Use a for loop so that we don't loop forever on bad debug info. */
10416 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10418 ULONGEST signature_in_table
;
10420 signature_in_table
=
10421 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10422 if (signature_in_table
== signature
)
10424 uint32_t unit_index
=
10425 read_4_bytes (dbfd
,
10426 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10428 if (dwp_file
->version
== 1)
10430 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10431 comp_dir
, signature
,
10436 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10437 comp_dir
, signature
,
10440 return (struct dwo_unit
*) *slot
;
10442 if (signature_in_table
== 0)
10444 hash
= (hash
+ hash2
) & mask
;
10447 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10448 " [in module %s]"),
10452 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10453 Open the file specified by FILE_NAME and hand it off to BFD for
10454 preliminary analysis. Return a newly initialized bfd *, which
10455 includes a canonicalized copy of FILE_NAME.
10456 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10457 SEARCH_CWD is true if the current directory is to be searched.
10458 It will be searched before debug-file-directory.
10459 If successful, the file is added to the bfd include table of the
10460 objfile's bfd (see gdb_bfd_record_inclusion).
10461 If unable to find/open the file, return NULL.
10462 NOTE: This function is derived from symfile_bfd_open. */
10465 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10469 char *absolute_name
;
10470 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10471 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10472 to debug_file_directory. */
10474 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10478 if (*debug_file_directory
!= '\0')
10479 search_path
= concat (".", dirname_separator_string
,
10480 debug_file_directory
, NULL
);
10482 search_path
= xstrdup (".");
10485 search_path
= xstrdup (debug_file_directory
);
10487 flags
= OPF_RETURN_REALPATH
;
10489 flags
|= OPF_SEARCH_IN_PATH
;
10490 desc
= openp (search_path
, flags
, file_name
,
10491 O_RDONLY
| O_BINARY
, &absolute_name
);
10492 xfree (search_path
);
10496 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10497 xfree (absolute_name
);
10498 if (sym_bfd
== NULL
)
10500 bfd_set_cacheable (sym_bfd
, 1);
10502 if (!bfd_check_format (sym_bfd
, bfd_object
))
10504 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10508 /* Success. Record the bfd as having been included by the objfile's bfd.
10509 This is important because things like demangled_names_hash lives in the
10510 objfile's per_bfd space and may have references to things like symbol
10511 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10512 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10517 /* Try to open DWO file FILE_NAME.
10518 COMP_DIR is the DW_AT_comp_dir attribute.
10519 The result is the bfd handle of the file.
10520 If there is a problem finding or opening the file, return NULL.
10521 Upon success, the canonicalized path of the file is stored in the bfd,
10522 same as symfile_bfd_open. */
10525 open_dwo_file (const char *file_name
, const char *comp_dir
)
10529 if (IS_ABSOLUTE_PATH (file_name
))
10530 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10532 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10534 if (comp_dir
!= NULL
)
10536 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10538 /* NOTE: If comp_dir is a relative path, this will also try the
10539 search path, which seems useful. */
10540 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10541 xfree (path_to_try
);
10546 /* That didn't work, try debug-file-directory, which, despite its name,
10547 is a list of paths. */
10549 if (*debug_file_directory
== '\0')
10552 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10555 /* This function is mapped across the sections and remembers the offset and
10556 size of each of the DWO debugging sections we are interested in. */
10559 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10561 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10562 const struct dwop_section_names
*names
= &dwop_section_names
;
10564 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10566 dwo_sections
->abbrev
.s
.section
= sectp
;
10567 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10569 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10571 dwo_sections
->info
.s
.section
= sectp
;
10572 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10574 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10576 dwo_sections
->line
.s
.section
= sectp
;
10577 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10579 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10581 dwo_sections
->loc
.s
.section
= sectp
;
10582 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10584 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10586 dwo_sections
->macinfo
.s
.section
= sectp
;
10587 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10589 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10591 dwo_sections
->macro
.s
.section
= sectp
;
10592 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10594 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10596 dwo_sections
->str
.s
.section
= sectp
;
10597 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10599 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10601 dwo_sections
->str_offsets
.s
.section
= sectp
;
10602 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10604 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10606 struct dwarf2_section_info type_section
;
10608 memset (&type_section
, 0, sizeof (type_section
));
10609 type_section
.s
.section
= sectp
;
10610 type_section
.size
= bfd_get_section_size (sectp
);
10611 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10616 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10617 by PER_CU. This is for the non-DWP case.
10618 The result is NULL if DWO_NAME can't be found. */
10620 static struct dwo_file
*
10621 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10622 const char *dwo_name
, const char *comp_dir
)
10624 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10625 struct dwo_file
*dwo_file
;
10627 struct cleanup
*cleanups
;
10629 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10632 if (dwarf_read_debug
)
10633 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10636 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10637 dwo_file
->dwo_name
= dwo_name
;
10638 dwo_file
->comp_dir
= comp_dir
;
10639 dwo_file
->dbfd
= dbfd
;
10641 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10643 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10645 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10647 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10648 dwo_file
->sections
.types
);
10650 discard_cleanups (cleanups
);
10652 if (dwarf_read_debug
)
10653 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10658 /* This function is mapped across the sections and remembers the offset and
10659 size of each of the DWP debugging sections common to version 1 and 2 that
10660 we are interested in. */
10663 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10664 void *dwp_file_ptr
)
10666 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10667 const struct dwop_section_names
*names
= &dwop_section_names
;
10668 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10670 /* Record the ELF section number for later lookup: this is what the
10671 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10672 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10673 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10675 /* Look for specific sections that we need. */
10676 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10678 dwp_file
->sections
.str
.s
.section
= sectp
;
10679 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10681 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10683 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10684 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10686 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10688 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10689 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10693 /* This function is mapped across the sections and remembers the offset and
10694 size of each of the DWP version 2 debugging sections that we are interested
10695 in. This is split into a separate function because we don't know if we
10696 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10699 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10701 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10702 const struct dwop_section_names
*names
= &dwop_section_names
;
10703 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10705 /* Record the ELF section number for later lookup: this is what the
10706 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10707 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10708 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10710 /* Look for specific sections that we need. */
10711 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10713 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10714 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10716 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10718 dwp_file
->sections
.info
.s
.section
= sectp
;
10719 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10721 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10723 dwp_file
->sections
.line
.s
.section
= sectp
;
10724 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10726 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10728 dwp_file
->sections
.loc
.s
.section
= sectp
;
10729 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10731 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10733 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10734 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10736 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10738 dwp_file
->sections
.macro
.s
.section
= sectp
;
10739 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10741 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10743 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10744 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10746 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10748 dwp_file
->sections
.types
.s
.section
= sectp
;
10749 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10753 /* Hash function for dwp_file loaded CUs/TUs. */
10756 hash_dwp_loaded_cutus (const void *item
)
10758 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10760 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10761 return dwo_unit
->signature
;
10764 /* Equality function for dwp_file loaded CUs/TUs. */
10767 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10769 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10770 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10772 return dua
->signature
== dub
->signature
;
10775 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10778 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10780 return htab_create_alloc_ex (3,
10781 hash_dwp_loaded_cutus
,
10782 eq_dwp_loaded_cutus
,
10784 &objfile
->objfile_obstack
,
10785 hashtab_obstack_allocate
,
10786 dummy_obstack_deallocate
);
10789 /* Try to open DWP file FILE_NAME.
10790 The result is the bfd handle of the file.
10791 If there is a problem finding or opening the file, return NULL.
10792 Upon success, the canonicalized path of the file is stored in the bfd,
10793 same as symfile_bfd_open. */
10796 open_dwp_file (const char *file_name
)
10800 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10804 /* Work around upstream bug 15652.
10805 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10806 [Whether that's a "bug" is debatable, but it is getting in our way.]
10807 We have no real idea where the dwp file is, because gdb's realpath-ing
10808 of the executable's path may have discarded the needed info.
10809 [IWBN if the dwp file name was recorded in the executable, akin to
10810 .gnu_debuglink, but that doesn't exist yet.]
10811 Strip the directory from FILE_NAME and search again. */
10812 if (*debug_file_directory
!= '\0')
10814 /* Don't implicitly search the current directory here.
10815 If the user wants to search "." to handle this case,
10816 it must be added to debug-file-directory. */
10817 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10824 /* Initialize the use of the DWP file for the current objfile.
10825 By convention the name of the DWP file is ${objfile}.dwp.
10826 The result is NULL if it can't be found. */
10828 static struct dwp_file
*
10829 open_and_init_dwp_file (void)
10831 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10832 struct dwp_file
*dwp_file
;
10835 struct cleanup
*cleanups
;
10837 /* Try to find first .dwp for the binary file before any symbolic links
10839 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10840 cleanups
= make_cleanup (xfree
, dwp_name
);
10842 dbfd
= open_dwp_file (dwp_name
);
10844 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10846 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10847 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10848 make_cleanup (xfree
, dwp_name
);
10849 dbfd
= open_dwp_file (dwp_name
);
10854 if (dwarf_read_debug
)
10855 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10856 do_cleanups (cleanups
);
10859 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10860 dwp_file
->name
= bfd_get_filename (dbfd
);
10861 dwp_file
->dbfd
= dbfd
;
10862 do_cleanups (cleanups
);
10864 /* +1: section 0 is unused */
10865 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10866 dwp_file
->elf_sections
=
10867 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10868 dwp_file
->num_sections
, asection
*);
10870 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10872 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10874 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10876 /* The DWP file version is stored in the hash table. Oh well. */
10877 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10879 /* Technically speaking, we should try to limp along, but this is
10880 pretty bizarre. We use pulongest here because that's the established
10881 portability solution (e.g, we cannot use %u for uint32_t). */
10882 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10883 " TU version %s [in DWP file %s]"),
10884 pulongest (dwp_file
->cus
->version
),
10885 pulongest (dwp_file
->tus
->version
), dwp_name
);
10887 dwp_file
->version
= dwp_file
->cus
->version
;
10889 if (dwp_file
->version
== 2)
10890 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10892 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10893 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10895 if (dwarf_read_debug
)
10897 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10898 fprintf_unfiltered (gdb_stdlog
,
10899 " %s CUs, %s TUs\n",
10900 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10901 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10907 /* Wrapper around open_and_init_dwp_file, only open it once. */
10909 static struct dwp_file
*
10910 get_dwp_file (void)
10912 if (! dwarf2_per_objfile
->dwp_checked
)
10914 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10915 dwarf2_per_objfile
->dwp_checked
= 1;
10917 return dwarf2_per_objfile
->dwp_file
;
10920 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10921 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10922 or in the DWP file for the objfile, referenced by THIS_UNIT.
10923 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10924 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10926 This is called, for example, when wanting to read a variable with a
10927 complex location. Therefore we don't want to do file i/o for every call.
10928 Therefore we don't want to look for a DWO file on every call.
10929 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10930 then we check if we've already seen DWO_NAME, and only THEN do we check
10933 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10934 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10936 static struct dwo_unit
*
10937 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10938 const char *dwo_name
, const char *comp_dir
,
10939 ULONGEST signature
, int is_debug_types
)
10941 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10942 const char *kind
= is_debug_types
? "TU" : "CU";
10943 void **dwo_file_slot
;
10944 struct dwo_file
*dwo_file
;
10945 struct dwp_file
*dwp_file
;
10947 /* First see if there's a DWP file.
10948 If we have a DWP file but didn't find the DWO inside it, don't
10949 look for the original DWO file. It makes gdb behave differently
10950 depending on whether one is debugging in the build tree. */
10952 dwp_file
= get_dwp_file ();
10953 if (dwp_file
!= NULL
)
10955 const struct dwp_hash_table
*dwp_htab
=
10956 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10958 if (dwp_htab
!= NULL
)
10960 struct dwo_unit
*dwo_cutu
=
10961 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10962 signature
, is_debug_types
);
10964 if (dwo_cutu
!= NULL
)
10966 if (dwarf_read_debug
)
10968 fprintf_unfiltered (gdb_stdlog
,
10969 "Virtual DWO %s %s found: @%s\n",
10970 kind
, hex_string (signature
),
10971 host_address_to_string (dwo_cutu
));
10979 /* No DWP file, look for the DWO file. */
10981 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10982 if (*dwo_file_slot
== NULL
)
10984 /* Read in the file and build a table of the CUs/TUs it contains. */
10985 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10987 /* NOTE: This will be NULL if unable to open the file. */
10988 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10990 if (dwo_file
!= NULL
)
10992 struct dwo_unit
*dwo_cutu
= NULL
;
10994 if (is_debug_types
&& dwo_file
->tus
)
10996 struct dwo_unit find_dwo_cutu
;
10998 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10999 find_dwo_cutu
.signature
= signature
;
11001 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11003 else if (!is_debug_types
&& dwo_file
->cu
)
11005 if (signature
== dwo_file
->cu
->signature
)
11006 dwo_cutu
= dwo_file
->cu
;
11009 if (dwo_cutu
!= NULL
)
11011 if (dwarf_read_debug
)
11013 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11014 kind
, dwo_name
, hex_string (signature
),
11015 host_address_to_string (dwo_cutu
));
11022 /* We didn't find it. This could mean a dwo_id mismatch, or
11023 someone deleted the DWO/DWP file, or the search path isn't set up
11024 correctly to find the file. */
11026 if (dwarf_read_debug
)
11028 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11029 kind
, dwo_name
, hex_string (signature
));
11032 /* This is a warning and not a complaint because it can be caused by
11033 pilot error (e.g., user accidentally deleting the DWO). */
11035 /* Print the name of the DWP file if we looked there, helps the user
11036 better diagnose the problem. */
11037 char *dwp_text
= NULL
;
11038 struct cleanup
*cleanups
;
11040 if (dwp_file
!= NULL
)
11041 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11042 cleanups
= make_cleanup (xfree
, dwp_text
);
11044 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11045 " [in module %s]"),
11046 kind
, dwo_name
, hex_string (signature
),
11047 dwp_text
!= NULL
? dwp_text
: "",
11048 this_unit
->is_debug_types
? "TU" : "CU",
11049 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11051 do_cleanups (cleanups
);
11056 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11057 See lookup_dwo_cutu_unit for details. */
11059 static struct dwo_unit
*
11060 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11061 const char *dwo_name
, const char *comp_dir
,
11062 ULONGEST signature
)
11064 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11067 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11068 See lookup_dwo_cutu_unit for details. */
11070 static struct dwo_unit
*
11071 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11072 const char *dwo_name
, const char *comp_dir
)
11074 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11077 /* Traversal function for queue_and_load_all_dwo_tus. */
11080 queue_and_load_dwo_tu (void **slot
, void *info
)
11082 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11083 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11084 ULONGEST signature
= dwo_unit
->signature
;
11085 struct signatured_type
*sig_type
=
11086 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11088 if (sig_type
!= NULL
)
11090 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11092 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11093 a real dependency of PER_CU on SIG_TYPE. That is detected later
11094 while processing PER_CU. */
11095 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11096 load_full_type_unit (sig_cu
);
11097 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11103 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11104 The DWO may have the only definition of the type, though it may not be
11105 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11106 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11109 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11111 struct dwo_unit
*dwo_unit
;
11112 struct dwo_file
*dwo_file
;
11114 gdb_assert (!per_cu
->is_debug_types
);
11115 gdb_assert (get_dwp_file () == NULL
);
11116 gdb_assert (per_cu
->cu
!= NULL
);
11118 dwo_unit
= per_cu
->cu
->dwo_unit
;
11119 gdb_assert (dwo_unit
!= NULL
);
11121 dwo_file
= dwo_unit
->dwo_file
;
11122 if (dwo_file
->tus
!= NULL
)
11123 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11126 /* Free all resources associated with DWO_FILE.
11127 Close the DWO file and munmap the sections.
11128 All memory should be on the objfile obstack. */
11131 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11134 struct dwarf2_section_info
*section
;
11136 /* Note: dbfd is NULL for virtual DWO files. */
11137 gdb_bfd_unref (dwo_file
->dbfd
);
11139 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11142 /* Wrapper for free_dwo_file for use in cleanups. */
11145 free_dwo_file_cleanup (void *arg
)
11147 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11148 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11150 free_dwo_file (dwo_file
, objfile
);
11153 /* Traversal function for free_dwo_files. */
11156 free_dwo_file_from_slot (void **slot
, void *info
)
11158 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11159 struct objfile
*objfile
= (struct objfile
*) info
;
11161 free_dwo_file (dwo_file
, objfile
);
11166 /* Free all resources associated with DWO_FILES. */
11169 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11171 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11174 /* Read in various DIEs. */
11176 /* qsort helper for inherit_abstract_dies. */
11179 unsigned_int_compar (const void *ap
, const void *bp
)
11181 unsigned int a
= *(unsigned int *) ap
;
11182 unsigned int b
= *(unsigned int *) bp
;
11184 return (a
> b
) - (b
> a
);
11187 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11188 Inherit only the children of the DW_AT_abstract_origin DIE not being
11189 already referenced by DW_AT_abstract_origin from the children of the
11193 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11195 struct die_info
*child_die
;
11196 unsigned die_children_count
;
11197 /* CU offsets which were referenced by children of the current DIE. */
11198 sect_offset
*offsets
;
11199 sect_offset
*offsets_end
, *offsetp
;
11200 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11201 struct die_info
*origin_die
;
11202 /* Iterator of the ORIGIN_DIE children. */
11203 struct die_info
*origin_child_die
;
11204 struct cleanup
*cleanups
;
11205 struct attribute
*attr
;
11206 struct dwarf2_cu
*origin_cu
;
11207 struct pending
**origin_previous_list_in_scope
;
11209 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11213 /* Note that following die references may follow to a die in a
11217 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11219 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11221 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11222 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11224 if (die
->tag
!= origin_die
->tag
11225 && !(die
->tag
== DW_TAG_inlined_subroutine
11226 && origin_die
->tag
== DW_TAG_subprogram
))
11227 complaint (&symfile_complaints
,
11228 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11229 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11231 child_die
= die
->child
;
11232 die_children_count
= 0;
11233 while (child_die
&& child_die
->tag
)
11235 child_die
= sibling_die (child_die
);
11236 die_children_count
++;
11238 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11239 cleanups
= make_cleanup (xfree
, offsets
);
11241 offsets_end
= offsets
;
11242 for (child_die
= die
->child
;
11243 child_die
&& child_die
->tag
;
11244 child_die
= sibling_die (child_die
))
11246 struct die_info
*child_origin_die
;
11247 struct dwarf2_cu
*child_origin_cu
;
11249 /* We are trying to process concrete instance entries:
11250 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11251 it's not relevant to our analysis here. i.e. detecting DIEs that are
11252 present in the abstract instance but not referenced in the concrete
11254 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11257 /* For each CHILD_DIE, find the corresponding child of
11258 ORIGIN_DIE. If there is more than one layer of
11259 DW_AT_abstract_origin, follow them all; there shouldn't be,
11260 but GCC versions at least through 4.4 generate this (GCC PR
11262 child_origin_die
= child_die
;
11263 child_origin_cu
= cu
;
11266 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11270 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11274 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11275 counterpart may exist. */
11276 if (child_origin_die
!= child_die
)
11278 if (child_die
->tag
!= child_origin_die
->tag
11279 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11280 && child_origin_die
->tag
== DW_TAG_subprogram
))
11281 complaint (&symfile_complaints
,
11282 _("Child DIE 0x%x and its abstract origin 0x%x have "
11283 "different tags"), child_die
->offset
.sect_off
,
11284 child_origin_die
->offset
.sect_off
);
11285 if (child_origin_die
->parent
!= origin_die
)
11286 complaint (&symfile_complaints
,
11287 _("Child DIE 0x%x and its abstract origin 0x%x have "
11288 "different parents"), child_die
->offset
.sect_off
,
11289 child_origin_die
->offset
.sect_off
);
11291 *offsets_end
++ = child_origin_die
->offset
;
11294 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11295 unsigned_int_compar
);
11296 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11297 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11298 complaint (&symfile_complaints
,
11299 _("Multiple children of DIE 0x%x refer "
11300 "to DIE 0x%x as their abstract origin"),
11301 die
->offset
.sect_off
, offsetp
->sect_off
);
11304 origin_child_die
= origin_die
->child
;
11305 while (origin_child_die
&& origin_child_die
->tag
)
11307 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11308 while (offsetp
< offsets_end
11309 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11311 if (offsetp
>= offsets_end
11312 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11314 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11315 Check whether we're already processing ORIGIN_CHILD_DIE.
11316 This can happen with mutually referenced abstract_origins.
11318 if (!origin_child_die
->in_process
)
11319 process_die (origin_child_die
, origin_cu
);
11321 origin_child_die
= sibling_die (origin_child_die
);
11323 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11325 do_cleanups (cleanups
);
11329 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11331 struct objfile
*objfile
= cu
->objfile
;
11332 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11333 struct context_stack
*newobj
;
11336 struct die_info
*child_die
;
11337 struct attribute
*attr
, *call_line
, *call_file
;
11339 CORE_ADDR baseaddr
;
11340 struct block
*block
;
11341 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11342 VEC (symbolp
) *template_args
= NULL
;
11343 struct template_symbol
*templ_func
= NULL
;
11347 /* If we do not have call site information, we can't show the
11348 caller of this inlined function. That's too confusing, so
11349 only use the scope for local variables. */
11350 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11351 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11352 if (call_line
== NULL
|| call_file
== NULL
)
11354 read_lexical_block_scope (die
, cu
);
11359 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11361 name
= dwarf2_name (die
, cu
);
11363 /* Ignore functions with missing or empty names. These are actually
11364 illegal according to the DWARF standard. */
11367 complaint (&symfile_complaints
,
11368 _("missing name for subprogram DIE at %d"),
11369 die
->offset
.sect_off
);
11373 /* Ignore functions with missing or invalid low and high pc attributes. */
11374 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11376 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11377 if (!attr
|| !DW_UNSND (attr
))
11378 complaint (&symfile_complaints
,
11379 _("cannot get low and high bounds "
11380 "for subprogram DIE at %d"),
11381 die
->offset
.sect_off
);
11385 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11386 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11388 /* If we have any template arguments, then we must allocate a
11389 different sort of symbol. */
11390 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11392 if (child_die
->tag
== DW_TAG_template_type_param
11393 || child_die
->tag
== DW_TAG_template_value_param
)
11395 templ_func
= allocate_template_symbol (objfile
);
11396 templ_func
->base
.is_cplus_template_function
= 1;
11401 newobj
= push_context (0, lowpc
);
11402 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11403 (struct symbol
*) templ_func
);
11405 /* If there is a location expression for DW_AT_frame_base, record
11407 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11409 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11411 /* If there is a location for the static link, record it. */
11412 newobj
->static_link
= NULL
;
11413 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11416 newobj
->static_link
11417 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11418 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11421 cu
->list_in_scope
= &local_symbols
;
11423 if (die
->child
!= NULL
)
11425 child_die
= die
->child
;
11426 while (child_die
&& child_die
->tag
)
11428 if (child_die
->tag
== DW_TAG_template_type_param
11429 || child_die
->tag
== DW_TAG_template_value_param
)
11431 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11434 VEC_safe_push (symbolp
, template_args
, arg
);
11437 process_die (child_die
, cu
);
11438 child_die
= sibling_die (child_die
);
11442 inherit_abstract_dies (die
, cu
);
11444 /* If we have a DW_AT_specification, we might need to import using
11445 directives from the context of the specification DIE. See the
11446 comment in determine_prefix. */
11447 if (cu
->language
== language_cplus
11448 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11450 struct dwarf2_cu
*spec_cu
= cu
;
11451 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11455 child_die
= spec_die
->child
;
11456 while (child_die
&& child_die
->tag
)
11458 if (child_die
->tag
== DW_TAG_imported_module
)
11459 process_die (child_die
, spec_cu
);
11460 child_die
= sibling_die (child_die
);
11463 /* In some cases, GCC generates specification DIEs that
11464 themselves contain DW_AT_specification attributes. */
11465 spec_die
= die_specification (spec_die
, &spec_cu
);
11469 newobj
= pop_context ();
11470 /* Make a block for the local symbols within. */
11471 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11472 newobj
->static_link
, lowpc
, highpc
);
11474 /* For C++, set the block's scope. */
11475 if ((cu
->language
== language_cplus
11476 || cu
->language
== language_fortran
11477 || cu
->language
== language_d
)
11478 && cu
->processing_has_namespace_info
)
11479 block_set_scope (block
, determine_prefix (die
, cu
),
11480 &objfile
->objfile_obstack
);
11482 /* If we have address ranges, record them. */
11483 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11485 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11487 /* Attach template arguments to function. */
11488 if (! VEC_empty (symbolp
, template_args
))
11490 gdb_assert (templ_func
!= NULL
);
11492 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11493 templ_func
->template_arguments
11494 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11495 templ_func
->n_template_arguments
);
11496 memcpy (templ_func
->template_arguments
,
11497 VEC_address (symbolp
, template_args
),
11498 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11499 VEC_free (symbolp
, template_args
);
11502 /* In C++, we can have functions nested inside functions (e.g., when
11503 a function declares a class that has methods). This means that
11504 when we finish processing a function scope, we may need to go
11505 back to building a containing block's symbol lists. */
11506 local_symbols
= newobj
->locals
;
11507 local_using_directives
= newobj
->local_using_directives
;
11509 /* If we've finished processing a top-level function, subsequent
11510 symbols go in the file symbol list. */
11511 if (outermost_context_p ())
11512 cu
->list_in_scope
= &file_symbols
;
11515 /* Process all the DIES contained within a lexical block scope. Start
11516 a new scope, process the dies, and then close the scope. */
11519 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11521 struct objfile
*objfile
= cu
->objfile
;
11522 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11523 struct context_stack
*newobj
;
11524 CORE_ADDR lowpc
, highpc
;
11525 struct die_info
*child_die
;
11526 CORE_ADDR baseaddr
;
11528 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11530 /* Ignore blocks with missing or invalid low and high pc attributes. */
11531 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11532 as multiple lexical blocks? Handling children in a sane way would
11533 be nasty. Might be easier to properly extend generic blocks to
11534 describe ranges. */
11535 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11537 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11538 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11540 push_context (0, lowpc
);
11541 if (die
->child
!= NULL
)
11543 child_die
= die
->child
;
11544 while (child_die
&& child_die
->tag
)
11546 process_die (child_die
, cu
);
11547 child_die
= sibling_die (child_die
);
11550 inherit_abstract_dies (die
, cu
);
11551 newobj
= pop_context ();
11553 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11555 struct block
*block
11556 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11557 newobj
->start_addr
, highpc
);
11559 /* Note that recording ranges after traversing children, as we
11560 do here, means that recording a parent's ranges entails
11561 walking across all its children's ranges as they appear in
11562 the address map, which is quadratic behavior.
11564 It would be nicer to record the parent's ranges before
11565 traversing its children, simply overriding whatever you find
11566 there. But since we don't even decide whether to create a
11567 block until after we've traversed its children, that's hard
11569 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11571 local_symbols
= newobj
->locals
;
11572 local_using_directives
= newobj
->local_using_directives
;
11575 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11578 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11580 struct objfile
*objfile
= cu
->objfile
;
11581 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11582 CORE_ADDR pc
, baseaddr
;
11583 struct attribute
*attr
;
11584 struct call_site
*call_site
, call_site_local
;
11587 struct die_info
*child_die
;
11589 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11591 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11594 complaint (&symfile_complaints
,
11595 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11596 "DIE 0x%x [in module %s]"),
11597 die
->offset
.sect_off
, objfile_name (objfile
));
11600 pc
= attr_value_as_address (attr
) + baseaddr
;
11601 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11603 if (cu
->call_site_htab
== NULL
)
11604 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11605 NULL
, &objfile
->objfile_obstack
,
11606 hashtab_obstack_allocate
, NULL
);
11607 call_site_local
.pc
= pc
;
11608 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11611 complaint (&symfile_complaints
,
11612 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11613 "DIE 0x%x [in module %s]"),
11614 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11615 objfile_name (objfile
));
11619 /* Count parameters at the caller. */
11622 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11623 child_die
= sibling_die (child_die
))
11625 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11627 complaint (&symfile_complaints
,
11628 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11629 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11630 child_die
->tag
, child_die
->offset
.sect_off
,
11631 objfile_name (objfile
));
11639 = ((struct call_site
*)
11640 obstack_alloc (&objfile
->objfile_obstack
,
11641 sizeof (*call_site
)
11642 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11644 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11645 call_site
->pc
= pc
;
11647 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11649 struct die_info
*func_die
;
11651 /* Skip also over DW_TAG_inlined_subroutine. */
11652 for (func_die
= die
->parent
;
11653 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11654 && func_die
->tag
!= DW_TAG_subroutine_type
;
11655 func_die
= func_die
->parent
);
11657 /* DW_AT_GNU_all_call_sites is a superset
11658 of DW_AT_GNU_all_tail_call_sites. */
11660 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11661 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11663 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11664 not complete. But keep CALL_SITE for look ups via call_site_htab,
11665 both the initial caller containing the real return address PC and
11666 the final callee containing the current PC of a chain of tail
11667 calls do not need to have the tail call list complete. But any
11668 function candidate for a virtual tail call frame searched via
11669 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11670 determined unambiguously. */
11674 struct type
*func_type
= NULL
;
11677 func_type
= get_die_type (func_die
, cu
);
11678 if (func_type
!= NULL
)
11680 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11682 /* Enlist this call site to the function. */
11683 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11684 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11687 complaint (&symfile_complaints
,
11688 _("Cannot find function owning DW_TAG_GNU_call_site "
11689 "DIE 0x%x [in module %s]"),
11690 die
->offset
.sect_off
, objfile_name (objfile
));
11694 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11696 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11697 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11698 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11699 /* Keep NULL DWARF_BLOCK. */;
11700 else if (attr_form_is_block (attr
))
11702 struct dwarf2_locexpr_baton
*dlbaton
;
11704 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11705 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11706 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11707 dlbaton
->per_cu
= cu
->per_cu
;
11709 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11711 else if (attr_form_is_ref (attr
))
11713 struct dwarf2_cu
*target_cu
= cu
;
11714 struct die_info
*target_die
;
11716 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11717 gdb_assert (target_cu
->objfile
== objfile
);
11718 if (die_is_declaration (target_die
, target_cu
))
11720 const char *target_physname
;
11722 /* Prefer the mangled name; otherwise compute the demangled one. */
11723 target_physname
= dwarf2_string_attr (target_die
,
11724 DW_AT_linkage_name
,
11726 if (target_physname
== NULL
)
11727 target_physname
= dwarf2_string_attr (target_die
,
11728 DW_AT_MIPS_linkage_name
,
11730 if (target_physname
== NULL
)
11731 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11732 if (target_physname
== NULL
)
11733 complaint (&symfile_complaints
,
11734 _("DW_AT_GNU_call_site_target target DIE has invalid "
11735 "physname, for referencing DIE 0x%x [in module %s]"),
11736 die
->offset
.sect_off
, objfile_name (objfile
));
11738 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11744 /* DW_AT_entry_pc should be preferred. */
11745 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11746 complaint (&symfile_complaints
,
11747 _("DW_AT_GNU_call_site_target target DIE has invalid "
11748 "low pc, for referencing DIE 0x%x [in module %s]"),
11749 die
->offset
.sect_off
, objfile_name (objfile
));
11752 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11753 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11758 complaint (&symfile_complaints
,
11759 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11760 "block nor reference, for DIE 0x%x [in module %s]"),
11761 die
->offset
.sect_off
, objfile_name (objfile
));
11763 call_site
->per_cu
= cu
->per_cu
;
11765 for (child_die
= die
->child
;
11766 child_die
&& child_die
->tag
;
11767 child_die
= sibling_die (child_die
))
11769 struct call_site_parameter
*parameter
;
11770 struct attribute
*loc
, *origin
;
11772 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11774 /* Already printed the complaint above. */
11778 gdb_assert (call_site
->parameter_count
< nparams
);
11779 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11781 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11782 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11783 register is contained in DW_AT_GNU_call_site_value. */
11785 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11786 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11787 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11789 sect_offset offset
;
11791 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11792 offset
= dwarf2_get_ref_die_offset (origin
);
11793 if (!offset_in_cu_p (&cu
->header
, offset
))
11795 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11796 binding can be done only inside one CU. Such referenced DIE
11797 therefore cannot be even moved to DW_TAG_partial_unit. */
11798 complaint (&symfile_complaints
,
11799 _("DW_AT_abstract_origin offset is not in CU for "
11800 "DW_TAG_GNU_call_site child DIE 0x%x "
11802 child_die
->offset
.sect_off
, objfile_name (objfile
));
11805 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11806 - cu
->header
.offset
.sect_off
);
11808 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11810 complaint (&symfile_complaints
,
11811 _("No DW_FORM_block* DW_AT_location for "
11812 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11813 child_die
->offset
.sect_off
, objfile_name (objfile
));
11818 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11819 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11820 if (parameter
->u
.dwarf_reg
!= -1)
11821 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11822 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11823 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11824 ¶meter
->u
.fb_offset
))
11825 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11828 complaint (&symfile_complaints
,
11829 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11830 "for DW_FORM_block* DW_AT_location is supported for "
11831 "DW_TAG_GNU_call_site child DIE 0x%x "
11833 child_die
->offset
.sect_off
, objfile_name (objfile
));
11838 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11839 if (!attr_form_is_block (attr
))
11841 complaint (&symfile_complaints
,
11842 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11843 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11844 child_die
->offset
.sect_off
, objfile_name (objfile
));
11847 parameter
->value
= DW_BLOCK (attr
)->data
;
11848 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11850 /* Parameters are not pre-cleared by memset above. */
11851 parameter
->data_value
= NULL
;
11852 parameter
->data_value_size
= 0;
11853 call_site
->parameter_count
++;
11855 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11858 if (!attr_form_is_block (attr
))
11859 complaint (&symfile_complaints
,
11860 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11861 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11862 child_die
->offset
.sect_off
, objfile_name (objfile
));
11865 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11866 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11872 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11873 Return 1 if the attributes are present and valid, otherwise, return 0.
11874 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11877 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11878 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11879 struct partial_symtab
*ranges_pst
)
11881 struct objfile
*objfile
= cu
->objfile
;
11882 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11883 struct comp_unit_head
*cu_header
= &cu
->header
;
11884 bfd
*obfd
= objfile
->obfd
;
11885 unsigned int addr_size
= cu_header
->addr_size
;
11886 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11887 /* Base address selection entry. */
11890 unsigned int dummy
;
11891 const gdb_byte
*buffer
;
11895 CORE_ADDR high
= 0;
11896 CORE_ADDR baseaddr
;
11898 found_base
= cu
->base_known
;
11899 base
= cu
->base_address
;
11901 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11902 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11904 complaint (&symfile_complaints
,
11905 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11909 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11911 /* Read in the largest possible address. */
11912 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11913 if ((marker
& mask
) == mask
)
11915 /* If we found the largest possible address, then
11916 read the base address. */
11917 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11918 buffer
+= 2 * addr_size
;
11919 offset
+= 2 * addr_size
;
11925 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11929 CORE_ADDR range_beginning
, range_end
;
11931 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11932 buffer
+= addr_size
;
11933 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11934 buffer
+= addr_size
;
11935 offset
+= 2 * addr_size
;
11937 /* An end of list marker is a pair of zero addresses. */
11938 if (range_beginning
== 0 && range_end
== 0)
11939 /* Found the end of list entry. */
11942 /* Each base address selection entry is a pair of 2 values.
11943 The first is the largest possible address, the second is
11944 the base address. Check for a base address here. */
11945 if ((range_beginning
& mask
) == mask
)
11947 /* If we found the largest possible address, then
11948 read the base address. */
11949 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11956 /* We have no valid base address for the ranges
11958 complaint (&symfile_complaints
,
11959 _("Invalid .debug_ranges data (no base address)"));
11963 if (range_beginning
> range_end
)
11965 /* Inverted range entries are invalid. */
11966 complaint (&symfile_complaints
,
11967 _("Invalid .debug_ranges data (inverted range)"));
11971 /* Empty range entries have no effect. */
11972 if (range_beginning
== range_end
)
11975 range_beginning
+= base
;
11978 /* A not-uncommon case of bad debug info.
11979 Don't pollute the addrmap with bad data. */
11980 if (range_beginning
+ baseaddr
== 0
11981 && !dwarf2_per_objfile
->has_section_at_zero
)
11983 complaint (&symfile_complaints
,
11984 _(".debug_ranges entry has start address of zero"
11985 " [in module %s]"), objfile_name (objfile
));
11989 if (ranges_pst
!= NULL
)
11994 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11995 range_beginning
+ baseaddr
);
11996 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11997 range_end
+ baseaddr
);
11998 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12002 /* FIXME: This is recording everything as a low-high
12003 segment of consecutive addresses. We should have a
12004 data structure for discontiguous block ranges
12008 low
= range_beginning
;
12014 if (range_beginning
< low
)
12015 low
= range_beginning
;
12016 if (range_end
> high
)
12022 /* If the first entry is an end-of-list marker, the range
12023 describes an empty scope, i.e. no instructions. */
12029 *high_return
= high
;
12033 /* Get low and high pc attributes from a die. Return 1 if the attributes
12034 are present and valid, otherwise, return 0. Return -1 if the range is
12035 discontinuous, i.e. derived from DW_AT_ranges information. */
12038 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12039 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12040 struct partial_symtab
*pst
)
12042 struct attribute
*attr
;
12043 struct attribute
*attr_high
;
12045 CORE_ADDR high
= 0;
12048 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12051 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12054 low
= attr_value_as_address (attr
);
12055 high
= attr_value_as_address (attr_high
);
12056 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12060 /* Found high w/o low attribute. */
12063 /* Found consecutive range of addresses. */
12068 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12071 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12072 We take advantage of the fact that DW_AT_ranges does not appear
12073 in DW_TAG_compile_unit of DWO files. */
12074 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12075 unsigned int ranges_offset
= (DW_UNSND (attr
)
12076 + (need_ranges_base
12080 /* Value of the DW_AT_ranges attribute is the offset in the
12081 .debug_ranges section. */
12082 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12084 /* Found discontinuous range of addresses. */
12089 /* read_partial_die has also the strict LOW < HIGH requirement. */
12093 /* When using the GNU linker, .gnu.linkonce. sections are used to
12094 eliminate duplicate copies of functions and vtables and such.
12095 The linker will arbitrarily choose one and discard the others.
12096 The AT_*_pc values for such functions refer to local labels in
12097 these sections. If the section from that file was discarded, the
12098 labels are not in the output, so the relocs get a value of 0.
12099 If this is a discarded function, mark the pc bounds as invalid,
12100 so that GDB will ignore it. */
12101 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12110 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12111 its low and high PC addresses. Do nothing if these addresses could not
12112 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12113 and HIGHPC to the high address if greater than HIGHPC. */
12116 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12117 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12118 struct dwarf2_cu
*cu
)
12120 CORE_ADDR low
, high
;
12121 struct die_info
*child
= die
->child
;
12123 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12125 *lowpc
= min (*lowpc
, low
);
12126 *highpc
= max (*highpc
, high
);
12129 /* If the language does not allow nested subprograms (either inside
12130 subprograms or lexical blocks), we're done. */
12131 if (cu
->language
!= language_ada
)
12134 /* Check all the children of the given DIE. If it contains nested
12135 subprograms, then check their pc bounds. Likewise, we need to
12136 check lexical blocks as well, as they may also contain subprogram
12138 while (child
&& child
->tag
)
12140 if (child
->tag
== DW_TAG_subprogram
12141 || child
->tag
== DW_TAG_lexical_block
)
12142 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12143 child
= sibling_die (child
);
12147 /* Get the low and high pc's represented by the scope DIE, and store
12148 them in *LOWPC and *HIGHPC. If the correct values can't be
12149 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12152 get_scope_pc_bounds (struct die_info
*die
,
12153 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12154 struct dwarf2_cu
*cu
)
12156 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12157 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12158 CORE_ADDR current_low
, current_high
;
12160 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12162 best_low
= current_low
;
12163 best_high
= current_high
;
12167 struct die_info
*child
= die
->child
;
12169 while (child
&& child
->tag
)
12171 switch (child
->tag
) {
12172 case DW_TAG_subprogram
:
12173 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12175 case DW_TAG_namespace
:
12176 case DW_TAG_module
:
12177 /* FIXME: carlton/2004-01-16: Should we do this for
12178 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12179 that current GCC's always emit the DIEs corresponding
12180 to definitions of methods of classes as children of a
12181 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12182 the DIEs giving the declarations, which could be
12183 anywhere). But I don't see any reason why the
12184 standards says that they have to be there. */
12185 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12187 if (current_low
!= ((CORE_ADDR
) -1))
12189 best_low
= min (best_low
, current_low
);
12190 best_high
= max (best_high
, current_high
);
12198 child
= sibling_die (child
);
12203 *highpc
= best_high
;
12206 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12210 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12211 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12213 struct objfile
*objfile
= cu
->objfile
;
12214 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12215 struct attribute
*attr
;
12216 struct attribute
*attr_high
;
12218 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12221 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12224 CORE_ADDR low
= attr_value_as_address (attr
);
12225 CORE_ADDR high
= attr_value_as_address (attr_high
);
12227 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12230 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12231 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12232 record_block_range (block
, low
, high
- 1);
12236 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12239 bfd
*obfd
= objfile
->obfd
;
12240 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12241 We take advantage of the fact that DW_AT_ranges does not appear
12242 in DW_TAG_compile_unit of DWO files. */
12243 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12245 /* The value of the DW_AT_ranges attribute is the offset of the
12246 address range list in the .debug_ranges section. */
12247 unsigned long offset
= (DW_UNSND (attr
)
12248 + (need_ranges_base
? cu
->ranges_base
: 0));
12249 const gdb_byte
*buffer
;
12251 /* For some target architectures, but not others, the
12252 read_address function sign-extends the addresses it returns.
12253 To recognize base address selection entries, we need a
12255 unsigned int addr_size
= cu
->header
.addr_size
;
12256 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12258 /* The base address, to which the next pair is relative. Note
12259 that this 'base' is a DWARF concept: most entries in a range
12260 list are relative, to reduce the number of relocs against the
12261 debugging information. This is separate from this function's
12262 'baseaddr' argument, which GDB uses to relocate debugging
12263 information from a shared library based on the address at
12264 which the library was loaded. */
12265 CORE_ADDR base
= cu
->base_address
;
12266 int base_known
= cu
->base_known
;
12268 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12269 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12271 complaint (&symfile_complaints
,
12272 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12276 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12280 unsigned int bytes_read
;
12281 CORE_ADDR start
, end
;
12283 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12284 buffer
+= bytes_read
;
12285 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12286 buffer
+= bytes_read
;
12288 /* Did we find the end of the range list? */
12289 if (start
== 0 && end
== 0)
12292 /* Did we find a base address selection entry? */
12293 else if ((start
& base_select_mask
) == base_select_mask
)
12299 /* We found an ordinary address range. */
12304 complaint (&symfile_complaints
,
12305 _("Invalid .debug_ranges data "
12306 "(no base address)"));
12312 /* Inverted range entries are invalid. */
12313 complaint (&symfile_complaints
,
12314 _("Invalid .debug_ranges data "
12315 "(inverted range)"));
12319 /* Empty range entries have no effect. */
12323 start
+= base
+ baseaddr
;
12324 end
+= base
+ baseaddr
;
12326 /* A not-uncommon case of bad debug info.
12327 Don't pollute the addrmap with bad data. */
12328 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12330 complaint (&symfile_complaints
,
12331 _(".debug_ranges entry has start address of zero"
12332 " [in module %s]"), objfile_name (objfile
));
12336 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12337 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12338 record_block_range (block
, start
, end
- 1);
12344 /* Check whether the producer field indicates either of GCC < 4.6, or the
12345 Intel C/C++ compiler, and cache the result in CU. */
12348 check_producer (struct dwarf2_cu
*cu
)
12353 if (cu
->producer
== NULL
)
12355 /* For unknown compilers expect their behavior is DWARF version
12358 GCC started to support .debug_types sections by -gdwarf-4 since
12359 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12360 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12361 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12362 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12364 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12366 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12367 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12369 else if (startswith (cu
->producer
, "Intel(R) C"))
12370 cu
->producer_is_icc
= 1;
12373 /* For other non-GCC compilers, expect their behavior is DWARF version
12377 cu
->checked_producer
= 1;
12380 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12381 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12382 during 4.6.0 experimental. */
12385 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12387 if (!cu
->checked_producer
)
12388 check_producer (cu
);
12390 return cu
->producer_is_gxx_lt_4_6
;
12393 /* Return the default accessibility type if it is not overriden by
12394 DW_AT_accessibility. */
12396 static enum dwarf_access_attribute
12397 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12399 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12401 /* The default DWARF 2 accessibility for members is public, the default
12402 accessibility for inheritance is private. */
12404 if (die
->tag
!= DW_TAG_inheritance
)
12405 return DW_ACCESS_public
;
12407 return DW_ACCESS_private
;
12411 /* DWARF 3+ defines the default accessibility a different way. The same
12412 rules apply now for DW_TAG_inheritance as for the members and it only
12413 depends on the container kind. */
12415 if (die
->parent
->tag
== DW_TAG_class_type
)
12416 return DW_ACCESS_private
;
12418 return DW_ACCESS_public
;
12422 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12423 offset. If the attribute was not found return 0, otherwise return
12424 1. If it was found but could not properly be handled, set *OFFSET
12428 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12431 struct attribute
*attr
;
12433 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12438 /* Note that we do not check for a section offset first here.
12439 This is because DW_AT_data_member_location is new in DWARF 4,
12440 so if we see it, we can assume that a constant form is really
12441 a constant and not a section offset. */
12442 if (attr_form_is_constant (attr
))
12443 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12444 else if (attr_form_is_section_offset (attr
))
12445 dwarf2_complex_location_expr_complaint ();
12446 else if (attr_form_is_block (attr
))
12447 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12449 dwarf2_complex_location_expr_complaint ();
12457 /* Add an aggregate field to the field list. */
12460 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12461 struct dwarf2_cu
*cu
)
12463 struct objfile
*objfile
= cu
->objfile
;
12464 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12465 struct nextfield
*new_field
;
12466 struct attribute
*attr
;
12468 const char *fieldname
= "";
12470 /* Allocate a new field list entry and link it in. */
12471 new_field
= XNEW (struct nextfield
);
12472 make_cleanup (xfree
, new_field
);
12473 memset (new_field
, 0, sizeof (struct nextfield
));
12475 if (die
->tag
== DW_TAG_inheritance
)
12477 new_field
->next
= fip
->baseclasses
;
12478 fip
->baseclasses
= new_field
;
12482 new_field
->next
= fip
->fields
;
12483 fip
->fields
= new_field
;
12487 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12489 new_field
->accessibility
= DW_UNSND (attr
);
12491 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12492 if (new_field
->accessibility
!= DW_ACCESS_public
)
12493 fip
->non_public_fields
= 1;
12495 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12497 new_field
->virtuality
= DW_UNSND (attr
);
12499 new_field
->virtuality
= DW_VIRTUALITY_none
;
12501 fp
= &new_field
->field
;
12503 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12507 /* Data member other than a C++ static data member. */
12509 /* Get type of field. */
12510 fp
->type
= die_type (die
, cu
);
12512 SET_FIELD_BITPOS (*fp
, 0);
12514 /* Get bit size of field (zero if none). */
12515 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12518 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12522 FIELD_BITSIZE (*fp
) = 0;
12525 /* Get bit offset of field. */
12526 if (handle_data_member_location (die
, cu
, &offset
))
12527 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12528 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12531 if (gdbarch_bits_big_endian (gdbarch
))
12533 /* For big endian bits, the DW_AT_bit_offset gives the
12534 additional bit offset from the MSB of the containing
12535 anonymous object to the MSB of the field. We don't
12536 have to do anything special since we don't need to
12537 know the size of the anonymous object. */
12538 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12542 /* For little endian bits, compute the bit offset to the
12543 MSB of the anonymous object, subtract off the number of
12544 bits from the MSB of the field to the MSB of the
12545 object, and then subtract off the number of bits of
12546 the field itself. The result is the bit offset of
12547 the LSB of the field. */
12548 int anonymous_size
;
12549 int bit_offset
= DW_UNSND (attr
);
12551 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12554 /* The size of the anonymous object containing
12555 the bit field is explicit, so use the
12556 indicated size (in bytes). */
12557 anonymous_size
= DW_UNSND (attr
);
12561 /* The size of the anonymous object containing
12562 the bit field must be inferred from the type
12563 attribute of the data member containing the
12565 anonymous_size
= TYPE_LENGTH (fp
->type
);
12567 SET_FIELD_BITPOS (*fp
,
12568 (FIELD_BITPOS (*fp
)
12569 + anonymous_size
* bits_per_byte
12570 - bit_offset
- FIELD_BITSIZE (*fp
)));
12574 /* Get name of field. */
12575 fieldname
= dwarf2_name (die
, cu
);
12576 if (fieldname
== NULL
)
12579 /* The name is already allocated along with this objfile, so we don't
12580 need to duplicate it for the type. */
12581 fp
->name
= fieldname
;
12583 /* Change accessibility for artificial fields (e.g. virtual table
12584 pointer or virtual base class pointer) to private. */
12585 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12587 FIELD_ARTIFICIAL (*fp
) = 1;
12588 new_field
->accessibility
= DW_ACCESS_private
;
12589 fip
->non_public_fields
= 1;
12592 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12594 /* C++ static member. */
12596 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12597 is a declaration, but all versions of G++ as of this writing
12598 (so through at least 3.2.1) incorrectly generate
12599 DW_TAG_variable tags. */
12601 const char *physname
;
12603 /* Get name of field. */
12604 fieldname
= dwarf2_name (die
, cu
);
12605 if (fieldname
== NULL
)
12608 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12610 /* Only create a symbol if this is an external value.
12611 new_symbol checks this and puts the value in the global symbol
12612 table, which we want. If it is not external, new_symbol
12613 will try to put the value in cu->list_in_scope which is wrong. */
12614 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12616 /* A static const member, not much different than an enum as far as
12617 we're concerned, except that we can support more types. */
12618 new_symbol (die
, NULL
, cu
);
12621 /* Get physical name. */
12622 physname
= dwarf2_physname (fieldname
, die
, cu
);
12624 /* The name is already allocated along with this objfile, so we don't
12625 need to duplicate it for the type. */
12626 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12627 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12628 FIELD_NAME (*fp
) = fieldname
;
12630 else if (die
->tag
== DW_TAG_inheritance
)
12634 /* C++ base class field. */
12635 if (handle_data_member_location (die
, cu
, &offset
))
12636 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12637 FIELD_BITSIZE (*fp
) = 0;
12638 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12639 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12640 fip
->nbaseclasses
++;
12644 /* Add a typedef defined in the scope of the FIP's class. */
12647 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12648 struct dwarf2_cu
*cu
)
12650 struct objfile
*objfile
= cu
->objfile
;
12651 struct typedef_field_list
*new_field
;
12652 struct attribute
*attr
;
12653 struct typedef_field
*fp
;
12654 char *fieldname
= "";
12656 /* Allocate a new field list entry and link it in. */
12657 new_field
= XCNEW (struct typedef_field_list
);
12658 make_cleanup (xfree
, new_field
);
12660 gdb_assert (die
->tag
== DW_TAG_typedef
);
12662 fp
= &new_field
->field
;
12664 /* Get name of field. */
12665 fp
->name
= dwarf2_name (die
, cu
);
12666 if (fp
->name
== NULL
)
12669 fp
->type
= read_type_die (die
, cu
);
12671 new_field
->next
= fip
->typedef_field_list
;
12672 fip
->typedef_field_list
= new_field
;
12673 fip
->typedef_field_list_count
++;
12676 /* Create the vector of fields, and attach it to the type. */
12679 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12680 struct dwarf2_cu
*cu
)
12682 int nfields
= fip
->nfields
;
12684 /* Record the field count, allocate space for the array of fields,
12685 and create blank accessibility bitfields if necessary. */
12686 TYPE_NFIELDS (type
) = nfields
;
12687 TYPE_FIELDS (type
) = (struct field
*)
12688 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12689 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12691 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12693 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12695 TYPE_FIELD_PRIVATE_BITS (type
) =
12696 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12697 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12699 TYPE_FIELD_PROTECTED_BITS (type
) =
12700 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12701 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12703 TYPE_FIELD_IGNORE_BITS (type
) =
12704 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12705 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12708 /* If the type has baseclasses, allocate and clear a bit vector for
12709 TYPE_FIELD_VIRTUAL_BITS. */
12710 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12712 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12713 unsigned char *pointer
;
12715 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12716 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12717 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12718 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12719 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12722 /* Copy the saved-up fields into the field vector. Start from the head of
12723 the list, adding to the tail of the field array, so that they end up in
12724 the same order in the array in which they were added to the list. */
12725 while (nfields
-- > 0)
12727 struct nextfield
*fieldp
;
12731 fieldp
= fip
->fields
;
12732 fip
->fields
= fieldp
->next
;
12736 fieldp
= fip
->baseclasses
;
12737 fip
->baseclasses
= fieldp
->next
;
12740 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12741 switch (fieldp
->accessibility
)
12743 case DW_ACCESS_private
:
12744 if (cu
->language
!= language_ada
)
12745 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12748 case DW_ACCESS_protected
:
12749 if (cu
->language
!= language_ada
)
12750 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12753 case DW_ACCESS_public
:
12757 /* Unknown accessibility. Complain and treat it as public. */
12759 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12760 fieldp
->accessibility
);
12764 if (nfields
< fip
->nbaseclasses
)
12766 switch (fieldp
->virtuality
)
12768 case DW_VIRTUALITY_virtual
:
12769 case DW_VIRTUALITY_pure_virtual
:
12770 if (cu
->language
== language_ada
)
12771 error (_("unexpected virtuality in component of Ada type"));
12772 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12779 /* Return true if this member function is a constructor, false
12783 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12785 const char *fieldname
;
12786 const char *type_name
;
12789 if (die
->parent
== NULL
)
12792 if (die
->parent
->tag
!= DW_TAG_structure_type
12793 && die
->parent
->tag
!= DW_TAG_union_type
12794 && die
->parent
->tag
!= DW_TAG_class_type
)
12797 fieldname
= dwarf2_name (die
, cu
);
12798 type_name
= dwarf2_name (die
->parent
, cu
);
12799 if (fieldname
== NULL
|| type_name
== NULL
)
12802 len
= strlen (fieldname
);
12803 return (strncmp (fieldname
, type_name
, len
) == 0
12804 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12807 /* Add a member function to the proper fieldlist. */
12810 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12811 struct type
*type
, struct dwarf2_cu
*cu
)
12813 struct objfile
*objfile
= cu
->objfile
;
12814 struct attribute
*attr
;
12815 struct fnfieldlist
*flp
;
12817 struct fn_field
*fnp
;
12818 const char *fieldname
;
12819 struct nextfnfield
*new_fnfield
;
12820 struct type
*this_type
;
12821 enum dwarf_access_attribute accessibility
;
12823 if (cu
->language
== language_ada
)
12824 error (_("unexpected member function in Ada type"));
12826 /* Get name of member function. */
12827 fieldname
= dwarf2_name (die
, cu
);
12828 if (fieldname
== NULL
)
12831 /* Look up member function name in fieldlist. */
12832 for (i
= 0; i
< fip
->nfnfields
; i
++)
12834 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12838 /* Create new list element if necessary. */
12839 if (i
< fip
->nfnfields
)
12840 flp
= &fip
->fnfieldlists
[i
];
12843 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12845 fip
->fnfieldlists
= (struct fnfieldlist
*)
12846 xrealloc (fip
->fnfieldlists
,
12847 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12848 * sizeof (struct fnfieldlist
));
12849 if (fip
->nfnfields
== 0)
12850 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12852 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12853 flp
->name
= fieldname
;
12856 i
= fip
->nfnfields
++;
12859 /* Create a new member function field and chain it to the field list
12861 new_fnfield
= XNEW (struct nextfnfield
);
12862 make_cleanup (xfree
, new_fnfield
);
12863 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12864 new_fnfield
->next
= flp
->head
;
12865 flp
->head
= new_fnfield
;
12868 /* Fill in the member function field info. */
12869 fnp
= &new_fnfield
->fnfield
;
12871 /* Delay processing of the physname until later. */
12872 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12874 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12879 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12880 fnp
->physname
= physname
? physname
: "";
12883 fnp
->type
= alloc_type (objfile
);
12884 this_type
= read_type_die (die
, cu
);
12885 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12887 int nparams
= TYPE_NFIELDS (this_type
);
12889 /* TYPE is the domain of this method, and THIS_TYPE is the type
12890 of the method itself (TYPE_CODE_METHOD). */
12891 smash_to_method_type (fnp
->type
, type
,
12892 TYPE_TARGET_TYPE (this_type
),
12893 TYPE_FIELDS (this_type
),
12894 TYPE_NFIELDS (this_type
),
12895 TYPE_VARARGS (this_type
));
12897 /* Handle static member functions.
12898 Dwarf2 has no clean way to discern C++ static and non-static
12899 member functions. G++ helps GDB by marking the first
12900 parameter for non-static member functions (which is the this
12901 pointer) as artificial. We obtain this information from
12902 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12903 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12904 fnp
->voffset
= VOFFSET_STATIC
;
12907 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12908 dwarf2_full_name (fieldname
, die
, cu
));
12910 /* Get fcontext from DW_AT_containing_type if present. */
12911 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12912 fnp
->fcontext
= die_containing_type (die
, cu
);
12914 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12915 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12917 /* Get accessibility. */
12918 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12920 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12922 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12923 switch (accessibility
)
12925 case DW_ACCESS_private
:
12926 fnp
->is_private
= 1;
12928 case DW_ACCESS_protected
:
12929 fnp
->is_protected
= 1;
12933 /* Check for artificial methods. */
12934 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12935 if (attr
&& DW_UNSND (attr
) != 0)
12936 fnp
->is_artificial
= 1;
12938 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12940 /* Get index in virtual function table if it is a virtual member
12941 function. For older versions of GCC, this is an offset in the
12942 appropriate virtual table, as specified by DW_AT_containing_type.
12943 For everyone else, it is an expression to be evaluated relative
12944 to the object address. */
12946 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12949 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12951 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12953 /* Old-style GCC. */
12954 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12956 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12957 || (DW_BLOCK (attr
)->size
> 1
12958 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12959 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12961 struct dwarf_block blk
;
12964 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12966 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12967 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12968 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12969 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12970 dwarf2_complex_location_expr_complaint ();
12972 fnp
->voffset
/= cu
->header
.addr_size
;
12976 dwarf2_complex_location_expr_complaint ();
12978 if (!fnp
->fcontext
)
12980 /* If there is no `this' field and no DW_AT_containing_type,
12981 we cannot actually find a base class context for the
12983 if (TYPE_NFIELDS (this_type
) == 0
12984 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12986 complaint (&symfile_complaints
,
12987 _("cannot determine context for virtual member "
12988 "function \"%s\" (offset %d)"),
12989 fieldname
, die
->offset
.sect_off
);
12994 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12998 else if (attr_form_is_section_offset (attr
))
13000 dwarf2_complex_location_expr_complaint ();
13004 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13010 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13011 if (attr
&& DW_UNSND (attr
))
13013 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13014 complaint (&symfile_complaints
,
13015 _("Member function \"%s\" (offset %d) is virtual "
13016 "but the vtable offset is not specified"),
13017 fieldname
, die
->offset
.sect_off
);
13018 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13019 TYPE_CPLUS_DYNAMIC (type
) = 1;
13024 /* Create the vector of member function fields, and attach it to the type. */
13027 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13028 struct dwarf2_cu
*cu
)
13030 struct fnfieldlist
*flp
;
13033 if (cu
->language
== language_ada
)
13034 error (_("unexpected member functions in Ada type"));
13036 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13037 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13038 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13040 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13042 struct nextfnfield
*nfp
= flp
->head
;
13043 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13046 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13047 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13048 fn_flp
->fn_fields
= (struct fn_field
*)
13049 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13050 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13051 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13054 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13057 /* Returns non-zero if NAME is the name of a vtable member in CU's
13058 language, zero otherwise. */
13060 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13062 static const char vptr
[] = "_vptr";
13063 static const char vtable
[] = "vtable";
13065 /* Look for the C++ and Java forms of the vtable. */
13066 if ((cu
->language
== language_java
13067 && startswith (name
, vtable
))
13068 || (startswith (name
, vptr
)
13069 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13075 /* GCC outputs unnamed structures that are really pointers to member
13076 functions, with the ABI-specified layout. If TYPE describes
13077 such a structure, smash it into a member function type.
13079 GCC shouldn't do this; it should just output pointer to member DIEs.
13080 This is GCC PR debug/28767. */
13083 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13085 struct type
*pfn_type
, *self_type
, *new_type
;
13087 /* Check for a structure with no name and two children. */
13088 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13091 /* Check for __pfn and __delta members. */
13092 if (TYPE_FIELD_NAME (type
, 0) == NULL
13093 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13094 || TYPE_FIELD_NAME (type
, 1) == NULL
13095 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13098 /* Find the type of the method. */
13099 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13100 if (pfn_type
== NULL
13101 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13102 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13105 /* Look for the "this" argument. */
13106 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13107 if (TYPE_NFIELDS (pfn_type
) == 0
13108 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13109 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13112 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13113 new_type
= alloc_type (objfile
);
13114 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13115 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13116 TYPE_VARARGS (pfn_type
));
13117 smash_to_methodptr_type (type
, new_type
);
13120 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13124 producer_is_icc (struct dwarf2_cu
*cu
)
13126 if (!cu
->checked_producer
)
13127 check_producer (cu
);
13129 return cu
->producer_is_icc
;
13132 /* Called when we find the DIE that starts a structure or union scope
13133 (definition) to create a type for the structure or union. Fill in
13134 the type's name and general properties; the members will not be
13135 processed until process_structure_scope. A symbol table entry for
13136 the type will also not be done until process_structure_scope (assuming
13137 the type has a name).
13139 NOTE: we need to call these functions regardless of whether or not the
13140 DIE has a DW_AT_name attribute, since it might be an anonymous
13141 structure or union. This gets the type entered into our set of
13142 user defined types. */
13144 static struct type
*
13145 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13147 struct objfile
*objfile
= cu
->objfile
;
13149 struct attribute
*attr
;
13152 /* If the definition of this type lives in .debug_types, read that type.
13153 Don't follow DW_AT_specification though, that will take us back up
13154 the chain and we want to go down. */
13155 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13158 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13160 /* The type's CU may not be the same as CU.
13161 Ensure TYPE is recorded with CU in die_type_hash. */
13162 return set_die_type (die
, type
, cu
);
13165 type
= alloc_type (objfile
);
13166 INIT_CPLUS_SPECIFIC (type
);
13168 name
= dwarf2_name (die
, cu
);
13171 if (cu
->language
== language_cplus
13172 || cu
->language
== language_java
13173 || cu
->language
== language_d
)
13175 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13177 /* dwarf2_full_name might have already finished building the DIE's
13178 type. If so, there is no need to continue. */
13179 if (get_die_type (die
, cu
) != NULL
)
13180 return get_die_type (die
, cu
);
13182 TYPE_TAG_NAME (type
) = full_name
;
13183 if (die
->tag
== DW_TAG_structure_type
13184 || die
->tag
== DW_TAG_class_type
)
13185 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13189 /* The name is already allocated along with this objfile, so
13190 we don't need to duplicate it for the type. */
13191 TYPE_TAG_NAME (type
) = name
;
13192 if (die
->tag
== DW_TAG_class_type
)
13193 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13197 if (die
->tag
== DW_TAG_structure_type
)
13199 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13201 else if (die
->tag
== DW_TAG_union_type
)
13203 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13207 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13210 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13211 TYPE_DECLARED_CLASS (type
) = 1;
13213 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13216 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13220 TYPE_LENGTH (type
) = 0;
13223 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13225 /* ICC does not output the required DW_AT_declaration
13226 on incomplete types, but gives them a size of zero. */
13227 TYPE_STUB (type
) = 1;
13230 TYPE_STUB_SUPPORTED (type
) = 1;
13232 if (die_is_declaration (die
, cu
))
13233 TYPE_STUB (type
) = 1;
13234 else if (attr
== NULL
&& die
->child
== NULL
13235 && producer_is_realview (cu
->producer
))
13236 /* RealView does not output the required DW_AT_declaration
13237 on incomplete types. */
13238 TYPE_STUB (type
) = 1;
13240 /* We need to add the type field to the die immediately so we don't
13241 infinitely recurse when dealing with pointers to the structure
13242 type within the structure itself. */
13243 set_die_type (die
, type
, cu
);
13245 /* set_die_type should be already done. */
13246 set_descriptive_type (type
, die
, cu
);
13251 /* Finish creating a structure or union type, including filling in
13252 its members and creating a symbol for it. */
13255 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13257 struct objfile
*objfile
= cu
->objfile
;
13258 struct die_info
*child_die
;
13261 type
= get_die_type (die
, cu
);
13263 type
= read_structure_type (die
, cu
);
13265 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13267 struct field_info fi
;
13268 VEC (symbolp
) *template_args
= NULL
;
13269 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13271 memset (&fi
, 0, sizeof (struct field_info
));
13273 child_die
= die
->child
;
13275 while (child_die
&& child_die
->tag
)
13277 if (child_die
->tag
== DW_TAG_member
13278 || child_die
->tag
== DW_TAG_variable
)
13280 /* NOTE: carlton/2002-11-05: A C++ static data member
13281 should be a DW_TAG_member that is a declaration, but
13282 all versions of G++ as of this writing (so through at
13283 least 3.2.1) incorrectly generate DW_TAG_variable
13284 tags for them instead. */
13285 dwarf2_add_field (&fi
, child_die
, cu
);
13287 else if (child_die
->tag
== DW_TAG_subprogram
)
13289 /* C++ member function. */
13290 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13292 else if (child_die
->tag
== DW_TAG_inheritance
)
13294 /* C++ base class field. */
13295 dwarf2_add_field (&fi
, child_die
, cu
);
13297 else if (child_die
->tag
== DW_TAG_typedef
)
13298 dwarf2_add_typedef (&fi
, child_die
, cu
);
13299 else if (child_die
->tag
== DW_TAG_template_type_param
13300 || child_die
->tag
== DW_TAG_template_value_param
)
13302 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13305 VEC_safe_push (symbolp
, template_args
, arg
);
13308 child_die
= sibling_die (child_die
);
13311 /* Attach template arguments to type. */
13312 if (! VEC_empty (symbolp
, template_args
))
13314 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13315 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13316 = VEC_length (symbolp
, template_args
);
13317 TYPE_TEMPLATE_ARGUMENTS (type
)
13318 = XOBNEWVEC (&objfile
->objfile_obstack
,
13320 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13321 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13322 VEC_address (symbolp
, template_args
),
13323 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13324 * sizeof (struct symbol
*)));
13325 VEC_free (symbolp
, template_args
);
13328 /* Attach fields and member functions to the type. */
13330 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13333 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13335 /* Get the type which refers to the base class (possibly this
13336 class itself) which contains the vtable pointer for the current
13337 class from the DW_AT_containing_type attribute. This use of
13338 DW_AT_containing_type is a GNU extension. */
13340 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13342 struct type
*t
= die_containing_type (die
, cu
);
13344 set_type_vptr_basetype (type
, t
);
13349 /* Our own class provides vtbl ptr. */
13350 for (i
= TYPE_NFIELDS (t
) - 1;
13351 i
>= TYPE_N_BASECLASSES (t
);
13354 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13356 if (is_vtable_name (fieldname
, cu
))
13358 set_type_vptr_fieldno (type
, i
);
13363 /* Complain if virtual function table field not found. */
13364 if (i
< TYPE_N_BASECLASSES (t
))
13365 complaint (&symfile_complaints
,
13366 _("virtual function table pointer "
13367 "not found when defining class '%s'"),
13368 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13373 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13376 else if (cu
->producer
13377 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13379 /* The IBM XLC compiler does not provide direct indication
13380 of the containing type, but the vtable pointer is
13381 always named __vfp. */
13385 for (i
= TYPE_NFIELDS (type
) - 1;
13386 i
>= TYPE_N_BASECLASSES (type
);
13389 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13391 set_type_vptr_fieldno (type
, i
);
13392 set_type_vptr_basetype (type
, type
);
13399 /* Copy fi.typedef_field_list linked list elements content into the
13400 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13401 if (fi
.typedef_field_list
)
13403 int i
= fi
.typedef_field_list_count
;
13405 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13406 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13407 = ((struct typedef_field
*)
13408 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13409 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13411 /* Reverse the list order to keep the debug info elements order. */
13414 struct typedef_field
*dest
, *src
;
13416 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13417 src
= &fi
.typedef_field_list
->field
;
13418 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13423 do_cleanups (back_to
);
13425 if (HAVE_CPLUS_STRUCT (type
))
13426 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13429 quirk_gcc_member_function_pointer (type
, objfile
);
13431 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13432 snapshots) has been known to create a die giving a declaration
13433 for a class that has, as a child, a die giving a definition for a
13434 nested class. So we have to process our children even if the
13435 current die is a declaration. Normally, of course, a declaration
13436 won't have any children at all. */
13438 child_die
= die
->child
;
13440 while (child_die
!= NULL
&& child_die
->tag
)
13442 if (child_die
->tag
== DW_TAG_member
13443 || child_die
->tag
== DW_TAG_variable
13444 || child_die
->tag
== DW_TAG_inheritance
13445 || child_die
->tag
== DW_TAG_template_value_param
13446 || child_die
->tag
== DW_TAG_template_type_param
)
13451 process_die (child_die
, cu
);
13453 child_die
= sibling_die (child_die
);
13456 /* Do not consider external references. According to the DWARF standard,
13457 these DIEs are identified by the fact that they have no byte_size
13458 attribute, and a declaration attribute. */
13459 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13460 || !die_is_declaration (die
, cu
))
13461 new_symbol (die
, type
, cu
);
13464 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13465 update TYPE using some information only available in DIE's children. */
13468 update_enumeration_type_from_children (struct die_info
*die
,
13470 struct dwarf2_cu
*cu
)
13472 struct obstack obstack
;
13473 struct die_info
*child_die
;
13474 int unsigned_enum
= 1;
13477 struct cleanup
*old_chain
;
13479 obstack_init (&obstack
);
13480 old_chain
= make_cleanup_obstack_free (&obstack
);
13482 for (child_die
= die
->child
;
13483 child_die
!= NULL
&& child_die
->tag
;
13484 child_die
= sibling_die (child_die
))
13486 struct attribute
*attr
;
13488 const gdb_byte
*bytes
;
13489 struct dwarf2_locexpr_baton
*baton
;
13492 if (child_die
->tag
!= DW_TAG_enumerator
)
13495 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13499 name
= dwarf2_name (child_die
, cu
);
13501 name
= "<anonymous enumerator>";
13503 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13504 &value
, &bytes
, &baton
);
13510 else if ((mask
& value
) != 0)
13515 /* If we already know that the enum type is neither unsigned, nor
13516 a flag type, no need to look at the rest of the enumerates. */
13517 if (!unsigned_enum
&& !flag_enum
)
13522 TYPE_UNSIGNED (type
) = 1;
13524 TYPE_FLAG_ENUM (type
) = 1;
13526 do_cleanups (old_chain
);
13529 /* Given a DW_AT_enumeration_type die, set its type. We do not
13530 complete the type's fields yet, or create any symbols. */
13532 static struct type
*
13533 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13535 struct objfile
*objfile
= cu
->objfile
;
13537 struct attribute
*attr
;
13540 /* If the definition of this type lives in .debug_types, read that type.
13541 Don't follow DW_AT_specification though, that will take us back up
13542 the chain and we want to go down. */
13543 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13546 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13548 /* The type's CU may not be the same as CU.
13549 Ensure TYPE is recorded with CU in die_type_hash. */
13550 return set_die_type (die
, type
, cu
);
13553 type
= alloc_type (objfile
);
13555 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13556 name
= dwarf2_full_name (NULL
, die
, cu
);
13558 TYPE_TAG_NAME (type
) = name
;
13560 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13563 struct type
*underlying_type
= die_type (die
, cu
);
13565 TYPE_TARGET_TYPE (type
) = underlying_type
;
13568 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13571 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13575 TYPE_LENGTH (type
) = 0;
13578 /* The enumeration DIE can be incomplete. In Ada, any type can be
13579 declared as private in the package spec, and then defined only
13580 inside the package body. Such types are known as Taft Amendment
13581 Types. When another package uses such a type, an incomplete DIE
13582 may be generated by the compiler. */
13583 if (die_is_declaration (die
, cu
))
13584 TYPE_STUB (type
) = 1;
13586 /* Finish the creation of this type by using the enum's children.
13587 We must call this even when the underlying type has been provided
13588 so that we can determine if we're looking at a "flag" enum. */
13589 update_enumeration_type_from_children (die
, type
, cu
);
13591 /* If this type has an underlying type that is not a stub, then we
13592 may use its attributes. We always use the "unsigned" attribute
13593 in this situation, because ordinarily we guess whether the type
13594 is unsigned -- but the guess can be wrong and the underlying type
13595 can tell us the reality. However, we defer to a local size
13596 attribute if one exists, because this lets the compiler override
13597 the underlying type if needed. */
13598 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13600 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13601 if (TYPE_LENGTH (type
) == 0)
13602 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13605 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13607 return set_die_type (die
, type
, cu
);
13610 /* Given a pointer to a die which begins an enumeration, process all
13611 the dies that define the members of the enumeration, and create the
13612 symbol for the enumeration type.
13614 NOTE: We reverse the order of the element list. */
13617 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13619 struct type
*this_type
;
13621 this_type
= get_die_type (die
, cu
);
13622 if (this_type
== NULL
)
13623 this_type
= read_enumeration_type (die
, cu
);
13625 if (die
->child
!= NULL
)
13627 struct die_info
*child_die
;
13628 struct symbol
*sym
;
13629 struct field
*fields
= NULL
;
13630 int num_fields
= 0;
13633 child_die
= die
->child
;
13634 while (child_die
&& child_die
->tag
)
13636 if (child_die
->tag
!= DW_TAG_enumerator
)
13638 process_die (child_die
, cu
);
13642 name
= dwarf2_name (child_die
, cu
);
13645 sym
= new_symbol (child_die
, this_type
, cu
);
13647 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13649 fields
= (struct field
*)
13651 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13652 * sizeof (struct field
));
13655 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13656 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13657 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13658 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13664 child_die
= sibling_die (child_die
);
13669 TYPE_NFIELDS (this_type
) = num_fields
;
13670 TYPE_FIELDS (this_type
) = (struct field
*)
13671 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13672 memcpy (TYPE_FIELDS (this_type
), fields
,
13673 sizeof (struct field
) * num_fields
);
13678 /* If we are reading an enum from a .debug_types unit, and the enum
13679 is a declaration, and the enum is not the signatured type in the
13680 unit, then we do not want to add a symbol for it. Adding a
13681 symbol would in some cases obscure the true definition of the
13682 enum, giving users an incomplete type when the definition is
13683 actually available. Note that we do not want to do this for all
13684 enums which are just declarations, because C++0x allows forward
13685 enum declarations. */
13686 if (cu
->per_cu
->is_debug_types
13687 && die_is_declaration (die
, cu
))
13689 struct signatured_type
*sig_type
;
13691 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13692 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13693 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13697 new_symbol (die
, this_type
, cu
);
13700 /* Extract all information from a DW_TAG_array_type DIE and put it in
13701 the DIE's type field. For now, this only handles one dimensional
13704 static struct type
*
13705 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13707 struct objfile
*objfile
= cu
->objfile
;
13708 struct die_info
*child_die
;
13710 struct type
*element_type
, *range_type
, *index_type
;
13711 struct type
**range_types
= NULL
;
13712 struct attribute
*attr
;
13714 struct cleanup
*back_to
;
13716 unsigned int bit_stride
= 0;
13718 element_type
= die_type (die
, cu
);
13720 /* The die_type call above may have already set the type for this DIE. */
13721 type
= get_die_type (die
, cu
);
13725 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13727 bit_stride
= DW_UNSND (attr
) * 8;
13729 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13731 bit_stride
= DW_UNSND (attr
);
13733 /* Irix 6.2 native cc creates array types without children for
13734 arrays with unspecified length. */
13735 if (die
->child
== NULL
)
13737 index_type
= objfile_type (objfile
)->builtin_int
;
13738 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13739 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13741 return set_die_type (die
, type
, cu
);
13744 back_to
= make_cleanup (null_cleanup
, NULL
);
13745 child_die
= die
->child
;
13746 while (child_die
&& child_die
->tag
)
13748 if (child_die
->tag
== DW_TAG_subrange_type
)
13750 struct type
*child_type
= read_type_die (child_die
, cu
);
13752 if (child_type
!= NULL
)
13754 /* The range type was succesfully read. Save it for the
13755 array type creation. */
13756 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13758 range_types
= (struct type
**)
13759 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13760 * sizeof (struct type
*));
13762 make_cleanup (free_current_contents
, &range_types
);
13764 range_types
[ndim
++] = child_type
;
13767 child_die
= sibling_die (child_die
);
13770 /* Dwarf2 dimensions are output from left to right, create the
13771 necessary array types in backwards order. */
13773 type
= element_type
;
13775 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13780 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13786 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13790 /* Understand Dwarf2 support for vector types (like they occur on
13791 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13792 array type. This is not part of the Dwarf2/3 standard yet, but a
13793 custom vendor extension. The main difference between a regular
13794 array and the vector variant is that vectors are passed by value
13796 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13798 make_vector_type (type
);
13800 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13801 implementation may choose to implement triple vectors using this
13803 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13806 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13807 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13809 complaint (&symfile_complaints
,
13810 _("DW_AT_byte_size for array type smaller "
13811 "than the total size of elements"));
13814 name
= dwarf2_name (die
, cu
);
13816 TYPE_NAME (type
) = name
;
13818 /* Install the type in the die. */
13819 set_die_type (die
, type
, cu
);
13821 /* set_die_type should be already done. */
13822 set_descriptive_type (type
, die
, cu
);
13824 do_cleanups (back_to
);
13829 static enum dwarf_array_dim_ordering
13830 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13832 struct attribute
*attr
;
13834 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13837 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13839 /* GNU F77 is a special case, as at 08/2004 array type info is the
13840 opposite order to the dwarf2 specification, but data is still
13841 laid out as per normal fortran.
13843 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13844 version checking. */
13846 if (cu
->language
== language_fortran
13847 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13849 return DW_ORD_row_major
;
13852 switch (cu
->language_defn
->la_array_ordering
)
13854 case array_column_major
:
13855 return DW_ORD_col_major
;
13856 case array_row_major
:
13858 return DW_ORD_row_major
;
13862 /* Extract all information from a DW_TAG_set_type DIE and put it in
13863 the DIE's type field. */
13865 static struct type
*
13866 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13868 struct type
*domain_type
, *set_type
;
13869 struct attribute
*attr
;
13871 domain_type
= die_type (die
, cu
);
13873 /* The die_type call above may have already set the type for this DIE. */
13874 set_type
= get_die_type (die
, cu
);
13878 set_type
= create_set_type (NULL
, domain_type
);
13880 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13882 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13884 return set_die_type (die
, set_type
, cu
);
13887 /* A helper for read_common_block that creates a locexpr baton.
13888 SYM is the symbol which we are marking as computed.
13889 COMMON_DIE is the DIE for the common block.
13890 COMMON_LOC is the location expression attribute for the common
13892 MEMBER_LOC is the location expression attribute for the particular
13893 member of the common block that we are processing.
13894 CU is the CU from which the above come. */
13897 mark_common_block_symbol_computed (struct symbol
*sym
,
13898 struct die_info
*common_die
,
13899 struct attribute
*common_loc
,
13900 struct attribute
*member_loc
,
13901 struct dwarf2_cu
*cu
)
13903 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13904 struct dwarf2_locexpr_baton
*baton
;
13906 unsigned int cu_off
;
13907 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13908 LONGEST offset
= 0;
13910 gdb_assert (common_loc
&& member_loc
);
13911 gdb_assert (attr_form_is_block (common_loc
));
13912 gdb_assert (attr_form_is_block (member_loc
)
13913 || attr_form_is_constant (member_loc
));
13915 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13916 baton
->per_cu
= cu
->per_cu
;
13917 gdb_assert (baton
->per_cu
);
13919 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13921 if (attr_form_is_constant (member_loc
))
13923 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13924 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13927 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13929 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13932 *ptr
++ = DW_OP_call4
;
13933 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13934 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13937 if (attr_form_is_constant (member_loc
))
13939 *ptr
++ = DW_OP_addr
;
13940 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13941 ptr
+= cu
->header
.addr_size
;
13945 /* We have to copy the data here, because DW_OP_call4 will only
13946 use a DW_AT_location attribute. */
13947 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13948 ptr
+= DW_BLOCK (member_loc
)->size
;
13951 *ptr
++ = DW_OP_plus
;
13952 gdb_assert (ptr
- baton
->data
== baton
->size
);
13954 SYMBOL_LOCATION_BATON (sym
) = baton
;
13955 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13958 /* Create appropriate locally-scoped variables for all the
13959 DW_TAG_common_block entries. Also create a struct common_block
13960 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13961 is used to sepate the common blocks name namespace from regular
13965 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13967 struct attribute
*attr
;
13969 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13972 /* Support the .debug_loc offsets. */
13973 if (attr_form_is_block (attr
))
13977 else if (attr_form_is_section_offset (attr
))
13979 dwarf2_complex_location_expr_complaint ();
13984 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13985 "common block member");
13990 if (die
->child
!= NULL
)
13992 struct objfile
*objfile
= cu
->objfile
;
13993 struct die_info
*child_die
;
13994 size_t n_entries
= 0, size
;
13995 struct common_block
*common_block
;
13996 struct symbol
*sym
;
13998 for (child_die
= die
->child
;
13999 child_die
&& child_die
->tag
;
14000 child_die
= sibling_die (child_die
))
14003 size
= (sizeof (struct common_block
)
14004 + (n_entries
- 1) * sizeof (struct symbol
*));
14006 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14008 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14009 common_block
->n_entries
= 0;
14011 for (child_die
= die
->child
;
14012 child_die
&& child_die
->tag
;
14013 child_die
= sibling_die (child_die
))
14015 /* Create the symbol in the DW_TAG_common_block block in the current
14017 sym
= new_symbol (child_die
, NULL
, cu
);
14020 struct attribute
*member_loc
;
14022 common_block
->contents
[common_block
->n_entries
++] = sym
;
14024 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14028 /* GDB has handled this for a long time, but it is
14029 not specified by DWARF. It seems to have been
14030 emitted by gfortran at least as recently as:
14031 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14032 complaint (&symfile_complaints
,
14033 _("Variable in common block has "
14034 "DW_AT_data_member_location "
14035 "- DIE at 0x%x [in module %s]"),
14036 child_die
->offset
.sect_off
,
14037 objfile_name (cu
->objfile
));
14039 if (attr_form_is_section_offset (member_loc
))
14040 dwarf2_complex_location_expr_complaint ();
14041 else if (attr_form_is_constant (member_loc
)
14042 || attr_form_is_block (member_loc
))
14045 mark_common_block_symbol_computed (sym
, die
, attr
,
14049 dwarf2_complex_location_expr_complaint ();
14054 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14055 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14059 /* Create a type for a C++ namespace. */
14061 static struct type
*
14062 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14064 struct objfile
*objfile
= cu
->objfile
;
14065 const char *previous_prefix
, *name
;
14069 /* For extensions, reuse the type of the original namespace. */
14070 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14072 struct die_info
*ext_die
;
14073 struct dwarf2_cu
*ext_cu
= cu
;
14075 ext_die
= dwarf2_extension (die
, &ext_cu
);
14076 type
= read_type_die (ext_die
, ext_cu
);
14078 /* EXT_CU may not be the same as CU.
14079 Ensure TYPE is recorded with CU in die_type_hash. */
14080 return set_die_type (die
, type
, cu
);
14083 name
= namespace_name (die
, &is_anonymous
, cu
);
14085 /* Now build the name of the current namespace. */
14087 previous_prefix
= determine_prefix (die
, cu
);
14088 if (previous_prefix
[0] != '\0')
14089 name
= typename_concat (&objfile
->objfile_obstack
,
14090 previous_prefix
, name
, 0, cu
);
14092 /* Create the type. */
14093 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14095 TYPE_NAME (type
) = name
;
14096 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14098 return set_die_type (die
, type
, cu
);
14101 /* Read a namespace scope. */
14104 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14106 struct objfile
*objfile
= cu
->objfile
;
14109 /* Add a symbol associated to this if we haven't seen the namespace
14110 before. Also, add a using directive if it's an anonymous
14113 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14117 type
= read_type_die (die
, cu
);
14118 new_symbol (die
, type
, cu
);
14120 namespace_name (die
, &is_anonymous
, cu
);
14123 const char *previous_prefix
= determine_prefix (die
, cu
);
14125 add_using_directive (using_directives (cu
->language
),
14126 previous_prefix
, TYPE_NAME (type
), NULL
,
14127 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14131 if (die
->child
!= NULL
)
14133 struct die_info
*child_die
= die
->child
;
14135 while (child_die
&& child_die
->tag
)
14137 process_die (child_die
, cu
);
14138 child_die
= sibling_die (child_die
);
14143 /* Read a Fortran module as type. This DIE can be only a declaration used for
14144 imported module. Still we need that type as local Fortran "use ... only"
14145 declaration imports depend on the created type in determine_prefix. */
14147 static struct type
*
14148 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14150 struct objfile
*objfile
= cu
->objfile
;
14151 const char *module_name
;
14154 module_name
= dwarf2_name (die
, cu
);
14156 complaint (&symfile_complaints
,
14157 _("DW_TAG_module has no name, offset 0x%x"),
14158 die
->offset
.sect_off
);
14159 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14161 /* determine_prefix uses TYPE_TAG_NAME. */
14162 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14164 return set_die_type (die
, type
, cu
);
14167 /* Read a Fortran module. */
14170 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14172 struct die_info
*child_die
= die
->child
;
14175 type
= read_type_die (die
, cu
);
14176 new_symbol (die
, type
, cu
);
14178 while (child_die
&& child_die
->tag
)
14180 process_die (child_die
, cu
);
14181 child_die
= sibling_die (child_die
);
14185 /* Return the name of the namespace represented by DIE. Set
14186 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14189 static const char *
14190 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14192 struct die_info
*current_die
;
14193 const char *name
= NULL
;
14195 /* Loop through the extensions until we find a name. */
14197 for (current_die
= die
;
14198 current_die
!= NULL
;
14199 current_die
= dwarf2_extension (die
, &cu
))
14201 /* We don't use dwarf2_name here so that we can detect the absence
14202 of a name -> anonymous namespace. */
14203 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14209 /* Is it an anonymous namespace? */
14211 *is_anonymous
= (name
== NULL
);
14213 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14218 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14219 the user defined type vector. */
14221 static struct type
*
14222 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14224 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14225 struct comp_unit_head
*cu_header
= &cu
->header
;
14227 struct attribute
*attr_byte_size
;
14228 struct attribute
*attr_address_class
;
14229 int byte_size
, addr_class
;
14230 struct type
*target_type
;
14232 target_type
= die_type (die
, cu
);
14234 /* The die_type call above may have already set the type for this DIE. */
14235 type
= get_die_type (die
, cu
);
14239 type
= lookup_pointer_type (target_type
);
14241 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14242 if (attr_byte_size
)
14243 byte_size
= DW_UNSND (attr_byte_size
);
14245 byte_size
= cu_header
->addr_size
;
14247 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14248 if (attr_address_class
)
14249 addr_class
= DW_UNSND (attr_address_class
);
14251 addr_class
= DW_ADDR_none
;
14253 /* If the pointer size or address class is different than the
14254 default, create a type variant marked as such and set the
14255 length accordingly. */
14256 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14258 if (gdbarch_address_class_type_flags_p (gdbarch
))
14262 type_flags
= gdbarch_address_class_type_flags
14263 (gdbarch
, byte_size
, addr_class
);
14264 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14266 type
= make_type_with_address_space (type
, type_flags
);
14268 else if (TYPE_LENGTH (type
) != byte_size
)
14270 complaint (&symfile_complaints
,
14271 _("invalid pointer size %d"), byte_size
);
14275 /* Should we also complain about unhandled address classes? */
14279 TYPE_LENGTH (type
) = byte_size
;
14280 return set_die_type (die
, type
, cu
);
14283 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14284 the user defined type vector. */
14286 static struct type
*
14287 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14290 struct type
*to_type
;
14291 struct type
*domain
;
14293 to_type
= die_type (die
, cu
);
14294 domain
= die_containing_type (die
, cu
);
14296 /* The calls above may have already set the type for this DIE. */
14297 type
= get_die_type (die
, cu
);
14301 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14302 type
= lookup_methodptr_type (to_type
);
14303 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14305 struct type
*new_type
= alloc_type (cu
->objfile
);
14307 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14308 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14309 TYPE_VARARGS (to_type
));
14310 type
= lookup_methodptr_type (new_type
);
14313 type
= lookup_memberptr_type (to_type
, domain
);
14315 return set_die_type (die
, type
, cu
);
14318 /* Extract all information from a DW_TAG_reference_type DIE and add to
14319 the user defined type vector. */
14321 static struct type
*
14322 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14324 struct comp_unit_head
*cu_header
= &cu
->header
;
14325 struct type
*type
, *target_type
;
14326 struct attribute
*attr
;
14328 target_type
= die_type (die
, cu
);
14330 /* The die_type call above may have already set the type for this DIE. */
14331 type
= get_die_type (die
, cu
);
14335 type
= lookup_reference_type (target_type
);
14336 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14339 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14343 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14345 return set_die_type (die
, type
, cu
);
14348 /* Add the given cv-qualifiers to the element type of the array. GCC
14349 outputs DWARF type qualifiers that apply to an array, not the
14350 element type. But GDB relies on the array element type to carry
14351 the cv-qualifiers. This mimics section 6.7.3 of the C99
14354 static struct type
*
14355 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14356 struct type
*base_type
, int cnst
, int voltl
)
14358 struct type
*el_type
, *inner_array
;
14360 base_type
= copy_type (base_type
);
14361 inner_array
= base_type
;
14363 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14365 TYPE_TARGET_TYPE (inner_array
) =
14366 copy_type (TYPE_TARGET_TYPE (inner_array
));
14367 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14370 el_type
= TYPE_TARGET_TYPE (inner_array
);
14371 cnst
|= TYPE_CONST (el_type
);
14372 voltl
|= TYPE_VOLATILE (el_type
);
14373 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14375 return set_die_type (die
, base_type
, cu
);
14378 static struct type
*
14379 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14381 struct type
*base_type
, *cv_type
;
14383 base_type
= die_type (die
, cu
);
14385 /* The die_type call above may have already set the type for this DIE. */
14386 cv_type
= get_die_type (die
, cu
);
14390 /* In case the const qualifier is applied to an array type, the element type
14391 is so qualified, not the array type (section 6.7.3 of C99). */
14392 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14393 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14395 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14396 return set_die_type (die
, cv_type
, cu
);
14399 static struct type
*
14400 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14402 struct type
*base_type
, *cv_type
;
14404 base_type
= die_type (die
, cu
);
14406 /* The die_type call above may have already set the type for this DIE. */
14407 cv_type
= get_die_type (die
, cu
);
14411 /* In case the volatile qualifier is applied to an array type, the
14412 element type is so qualified, not the array type (section 6.7.3
14414 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14415 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14417 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14418 return set_die_type (die
, cv_type
, cu
);
14421 /* Handle DW_TAG_restrict_type. */
14423 static struct type
*
14424 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14426 struct type
*base_type
, *cv_type
;
14428 base_type
= die_type (die
, cu
);
14430 /* The die_type call above may have already set the type for this DIE. */
14431 cv_type
= get_die_type (die
, cu
);
14435 cv_type
= make_restrict_type (base_type
);
14436 return set_die_type (die
, cv_type
, cu
);
14439 /* Handle DW_TAG_atomic_type. */
14441 static struct type
*
14442 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14444 struct type
*base_type
, *cv_type
;
14446 base_type
= die_type (die
, cu
);
14448 /* The die_type call above may have already set the type for this DIE. */
14449 cv_type
= get_die_type (die
, cu
);
14453 cv_type
= make_atomic_type (base_type
);
14454 return set_die_type (die
, cv_type
, cu
);
14457 /* Extract all information from a DW_TAG_string_type DIE and add to
14458 the user defined type vector. It isn't really a user defined type,
14459 but it behaves like one, with other DIE's using an AT_user_def_type
14460 attribute to reference it. */
14462 static struct type
*
14463 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14465 struct objfile
*objfile
= cu
->objfile
;
14466 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14467 struct type
*type
, *range_type
, *index_type
, *char_type
;
14468 struct attribute
*attr
;
14469 unsigned int length
;
14471 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14474 length
= DW_UNSND (attr
);
14478 /* Check for the DW_AT_byte_size attribute. */
14479 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14482 length
= DW_UNSND (attr
);
14490 index_type
= objfile_type (objfile
)->builtin_int
;
14491 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14492 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14493 type
= create_string_type (NULL
, char_type
, range_type
);
14495 return set_die_type (die
, type
, cu
);
14498 /* Assuming that DIE corresponds to a function, returns nonzero
14499 if the function is prototyped. */
14502 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14504 struct attribute
*attr
;
14506 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14507 if (attr
&& (DW_UNSND (attr
) != 0))
14510 /* The DWARF standard implies that the DW_AT_prototyped attribute
14511 is only meaninful for C, but the concept also extends to other
14512 languages that allow unprototyped functions (Eg: Objective C).
14513 For all other languages, assume that functions are always
14515 if (cu
->language
!= language_c
14516 && cu
->language
!= language_objc
14517 && cu
->language
!= language_opencl
)
14520 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14521 prototyped and unprototyped functions; default to prototyped,
14522 since that is more common in modern code (and RealView warns
14523 about unprototyped functions). */
14524 if (producer_is_realview (cu
->producer
))
14530 /* Handle DIES due to C code like:
14534 int (*funcp)(int a, long l);
14538 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14540 static struct type
*
14541 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14543 struct objfile
*objfile
= cu
->objfile
;
14544 struct type
*type
; /* Type that this function returns. */
14545 struct type
*ftype
; /* Function that returns above type. */
14546 struct attribute
*attr
;
14548 type
= die_type (die
, cu
);
14550 /* The die_type call above may have already set the type for this DIE. */
14551 ftype
= get_die_type (die
, cu
);
14555 ftype
= lookup_function_type (type
);
14557 if (prototyped_function_p (die
, cu
))
14558 TYPE_PROTOTYPED (ftype
) = 1;
14560 /* Store the calling convention in the type if it's available in
14561 the subroutine die. Otherwise set the calling convention to
14562 the default value DW_CC_normal. */
14563 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14565 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14566 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14567 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14569 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14571 /* Record whether the function returns normally to its caller or not
14572 if the DWARF producer set that information. */
14573 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14574 if (attr
&& (DW_UNSND (attr
) != 0))
14575 TYPE_NO_RETURN (ftype
) = 1;
14577 /* We need to add the subroutine type to the die immediately so
14578 we don't infinitely recurse when dealing with parameters
14579 declared as the same subroutine type. */
14580 set_die_type (die
, ftype
, cu
);
14582 if (die
->child
!= NULL
)
14584 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14585 struct die_info
*child_die
;
14586 int nparams
, iparams
;
14588 /* Count the number of parameters.
14589 FIXME: GDB currently ignores vararg functions, but knows about
14590 vararg member functions. */
14592 child_die
= die
->child
;
14593 while (child_die
&& child_die
->tag
)
14595 if (child_die
->tag
== DW_TAG_formal_parameter
)
14597 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14598 TYPE_VARARGS (ftype
) = 1;
14599 child_die
= sibling_die (child_die
);
14602 /* Allocate storage for parameters and fill them in. */
14603 TYPE_NFIELDS (ftype
) = nparams
;
14604 TYPE_FIELDS (ftype
) = (struct field
*)
14605 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14607 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14608 even if we error out during the parameters reading below. */
14609 for (iparams
= 0; iparams
< nparams
; iparams
++)
14610 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14613 child_die
= die
->child
;
14614 while (child_die
&& child_die
->tag
)
14616 if (child_die
->tag
== DW_TAG_formal_parameter
)
14618 struct type
*arg_type
;
14620 /* DWARF version 2 has no clean way to discern C++
14621 static and non-static member functions. G++ helps
14622 GDB by marking the first parameter for non-static
14623 member functions (which is the this pointer) as
14624 artificial. We pass this information to
14625 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14627 DWARF version 3 added DW_AT_object_pointer, which GCC
14628 4.5 does not yet generate. */
14629 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14631 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14634 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14636 /* GCC/43521: In java, the formal parameter
14637 "this" is sometimes not marked with DW_AT_artificial. */
14638 if (cu
->language
== language_java
)
14640 const char *name
= dwarf2_name (child_die
, cu
);
14642 if (name
&& !strcmp (name
, "this"))
14643 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14646 arg_type
= die_type (child_die
, cu
);
14648 /* RealView does not mark THIS as const, which the testsuite
14649 expects. GCC marks THIS as const in method definitions,
14650 but not in the class specifications (GCC PR 43053). */
14651 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14652 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14655 struct dwarf2_cu
*arg_cu
= cu
;
14656 const char *name
= dwarf2_name (child_die
, cu
);
14658 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14661 /* If the compiler emits this, use it. */
14662 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14665 else if (name
&& strcmp (name
, "this") == 0)
14666 /* Function definitions will have the argument names. */
14668 else if (name
== NULL
&& iparams
== 0)
14669 /* Declarations may not have the names, so like
14670 elsewhere in GDB, assume an artificial first
14671 argument is "this". */
14675 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14679 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14682 child_die
= sibling_die (child_die
);
14689 static struct type
*
14690 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14692 struct objfile
*objfile
= cu
->objfile
;
14693 const char *name
= NULL
;
14694 struct type
*this_type
, *target_type
;
14696 name
= dwarf2_full_name (NULL
, die
, cu
);
14697 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14698 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14699 TYPE_NAME (this_type
) = name
;
14700 set_die_type (die
, this_type
, cu
);
14701 target_type
= die_type (die
, cu
);
14702 if (target_type
!= this_type
)
14703 TYPE_TARGET_TYPE (this_type
) = target_type
;
14706 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14707 spec and cause infinite loops in GDB. */
14708 complaint (&symfile_complaints
,
14709 _("Self-referential DW_TAG_typedef "
14710 "- DIE at 0x%x [in module %s]"),
14711 die
->offset
.sect_off
, objfile_name (objfile
));
14712 TYPE_TARGET_TYPE (this_type
) = NULL
;
14717 /* Find a representation of a given base type and install
14718 it in the TYPE field of the die. */
14720 static struct type
*
14721 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14723 struct objfile
*objfile
= cu
->objfile
;
14725 struct attribute
*attr
;
14726 int encoding
= 0, size
= 0;
14728 enum type_code code
= TYPE_CODE_INT
;
14729 int type_flags
= 0;
14730 struct type
*target_type
= NULL
;
14732 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14735 encoding
= DW_UNSND (attr
);
14737 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14740 size
= DW_UNSND (attr
);
14742 name
= dwarf2_name (die
, cu
);
14745 complaint (&symfile_complaints
,
14746 _("DW_AT_name missing from DW_TAG_base_type"));
14751 case DW_ATE_address
:
14752 /* Turn DW_ATE_address into a void * pointer. */
14753 code
= TYPE_CODE_PTR
;
14754 type_flags
|= TYPE_FLAG_UNSIGNED
;
14755 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14757 case DW_ATE_boolean
:
14758 code
= TYPE_CODE_BOOL
;
14759 type_flags
|= TYPE_FLAG_UNSIGNED
;
14761 case DW_ATE_complex_float
:
14762 code
= TYPE_CODE_COMPLEX
;
14763 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14765 case DW_ATE_decimal_float
:
14766 code
= TYPE_CODE_DECFLOAT
;
14769 code
= TYPE_CODE_FLT
;
14771 case DW_ATE_signed
:
14773 case DW_ATE_unsigned
:
14774 type_flags
|= TYPE_FLAG_UNSIGNED
;
14775 if (cu
->language
== language_fortran
14777 && startswith (name
, "character("))
14778 code
= TYPE_CODE_CHAR
;
14780 case DW_ATE_signed_char
:
14781 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14782 || cu
->language
== language_pascal
14783 || cu
->language
== language_fortran
)
14784 code
= TYPE_CODE_CHAR
;
14786 case DW_ATE_unsigned_char
:
14787 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14788 || cu
->language
== language_pascal
14789 || cu
->language
== language_fortran
)
14790 code
= TYPE_CODE_CHAR
;
14791 type_flags
|= TYPE_FLAG_UNSIGNED
;
14794 /* We just treat this as an integer and then recognize the
14795 type by name elsewhere. */
14799 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14800 dwarf_type_encoding_name (encoding
));
14804 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14805 TYPE_NAME (type
) = name
;
14806 TYPE_TARGET_TYPE (type
) = target_type
;
14808 if (name
&& strcmp (name
, "char") == 0)
14809 TYPE_NOSIGN (type
) = 1;
14811 return set_die_type (die
, type
, cu
);
14814 /* Parse dwarf attribute if it's a block, reference or constant and put the
14815 resulting value of the attribute into struct bound_prop.
14816 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14819 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14820 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14822 struct dwarf2_property_baton
*baton
;
14823 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14825 if (attr
== NULL
|| prop
== NULL
)
14828 if (attr_form_is_block (attr
))
14830 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14831 baton
->referenced_type
= NULL
;
14832 baton
->locexpr
.per_cu
= cu
->per_cu
;
14833 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14834 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14835 prop
->data
.baton
= baton
;
14836 prop
->kind
= PROP_LOCEXPR
;
14837 gdb_assert (prop
->data
.baton
!= NULL
);
14839 else if (attr_form_is_ref (attr
))
14841 struct dwarf2_cu
*target_cu
= cu
;
14842 struct die_info
*target_die
;
14843 struct attribute
*target_attr
;
14845 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14846 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14847 if (target_attr
== NULL
)
14848 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14850 if (target_attr
== NULL
)
14853 switch (target_attr
->name
)
14855 case DW_AT_location
:
14856 if (attr_form_is_section_offset (target_attr
))
14858 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14859 baton
->referenced_type
= die_type (target_die
, target_cu
);
14860 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14861 prop
->data
.baton
= baton
;
14862 prop
->kind
= PROP_LOCLIST
;
14863 gdb_assert (prop
->data
.baton
!= NULL
);
14865 else if (attr_form_is_block (target_attr
))
14867 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14868 baton
->referenced_type
= die_type (target_die
, target_cu
);
14869 baton
->locexpr
.per_cu
= cu
->per_cu
;
14870 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14871 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14872 prop
->data
.baton
= baton
;
14873 prop
->kind
= PROP_LOCEXPR
;
14874 gdb_assert (prop
->data
.baton
!= NULL
);
14878 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14879 "dynamic property");
14883 case DW_AT_data_member_location
:
14887 if (!handle_data_member_location (target_die
, target_cu
,
14891 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14892 baton
->referenced_type
= read_type_die (target_die
->parent
,
14894 baton
->offset_info
.offset
= offset
;
14895 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14896 prop
->data
.baton
= baton
;
14897 prop
->kind
= PROP_ADDR_OFFSET
;
14902 else if (attr_form_is_constant (attr
))
14904 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14905 prop
->kind
= PROP_CONST
;
14909 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14910 dwarf2_name (die
, cu
));
14917 /* Read the given DW_AT_subrange DIE. */
14919 static struct type
*
14920 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14922 struct type
*base_type
, *orig_base_type
;
14923 struct type
*range_type
;
14924 struct attribute
*attr
;
14925 struct dynamic_prop low
, high
;
14926 int low_default_is_valid
;
14927 int high_bound_is_count
= 0;
14929 LONGEST negative_mask
;
14931 orig_base_type
= die_type (die
, cu
);
14932 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14933 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14934 creating the range type, but we use the result of check_typedef
14935 when examining properties of the type. */
14936 base_type
= check_typedef (orig_base_type
);
14938 /* The die_type call above may have already set the type for this DIE. */
14939 range_type
= get_die_type (die
, cu
);
14943 low
.kind
= PROP_CONST
;
14944 high
.kind
= PROP_CONST
;
14945 high
.data
.const_val
= 0;
14947 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14948 omitting DW_AT_lower_bound. */
14949 switch (cu
->language
)
14952 case language_cplus
:
14953 low
.data
.const_val
= 0;
14954 low_default_is_valid
= 1;
14956 case language_fortran
:
14957 low
.data
.const_val
= 1;
14958 low_default_is_valid
= 1;
14961 case language_java
:
14962 case language_objc
:
14963 low
.data
.const_val
= 0;
14964 low_default_is_valid
= (cu
->header
.version
>= 4);
14968 case language_pascal
:
14969 low
.data
.const_val
= 1;
14970 low_default_is_valid
= (cu
->header
.version
>= 4);
14973 low
.data
.const_val
= 0;
14974 low_default_is_valid
= 0;
14978 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14980 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14981 else if (!low_default_is_valid
)
14982 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14983 "- DIE at 0x%x [in module %s]"),
14984 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14986 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14987 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14989 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14990 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14992 /* If bounds are constant do the final calculation here. */
14993 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14994 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14996 high_bound_is_count
= 1;
15000 /* Dwarf-2 specifications explicitly allows to create subrange types
15001 without specifying a base type.
15002 In that case, the base type must be set to the type of
15003 the lower bound, upper bound or count, in that order, if any of these
15004 three attributes references an object that has a type.
15005 If no base type is found, the Dwarf-2 specifications say that
15006 a signed integer type of size equal to the size of an address should
15008 For the following C code: `extern char gdb_int [];'
15009 GCC produces an empty range DIE.
15010 FIXME: muller/2010-05-28: Possible references to object for low bound,
15011 high bound or count are not yet handled by this code. */
15012 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15014 struct objfile
*objfile
= cu
->objfile
;
15015 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15016 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15017 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15019 /* Test "int", "long int", and "long long int" objfile types,
15020 and select the first one having a size above or equal to the
15021 architecture address size. */
15022 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15023 base_type
= int_type
;
15026 int_type
= objfile_type (objfile
)->builtin_long
;
15027 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15028 base_type
= int_type
;
15031 int_type
= objfile_type (objfile
)->builtin_long_long
;
15032 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15033 base_type
= int_type
;
15038 /* Normally, the DWARF producers are expected to use a signed
15039 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15040 But this is unfortunately not always the case, as witnessed
15041 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15042 is used instead. To work around that ambiguity, we treat
15043 the bounds as signed, and thus sign-extend their values, when
15044 the base type is signed. */
15046 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
15047 if (low
.kind
== PROP_CONST
15048 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15049 low
.data
.const_val
|= negative_mask
;
15050 if (high
.kind
== PROP_CONST
15051 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15052 high
.data
.const_val
|= negative_mask
;
15054 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15056 if (high_bound_is_count
)
15057 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15059 /* Ada expects an empty array on no boundary attributes. */
15060 if (attr
== NULL
&& cu
->language
!= language_ada
)
15061 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15063 name
= dwarf2_name (die
, cu
);
15065 TYPE_NAME (range_type
) = name
;
15067 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15069 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15071 set_die_type (die
, range_type
, cu
);
15073 /* set_die_type should be already done. */
15074 set_descriptive_type (range_type
, die
, cu
);
15079 static struct type
*
15080 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15084 /* For now, we only support the C meaning of an unspecified type: void. */
15086 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15087 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15089 return set_die_type (die
, type
, cu
);
15092 /* Read a single die and all its descendents. Set the die's sibling
15093 field to NULL; set other fields in the die correctly, and set all
15094 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15095 location of the info_ptr after reading all of those dies. PARENT
15096 is the parent of the die in question. */
15098 static struct die_info
*
15099 read_die_and_children (const struct die_reader_specs
*reader
,
15100 const gdb_byte
*info_ptr
,
15101 const gdb_byte
**new_info_ptr
,
15102 struct die_info
*parent
)
15104 struct die_info
*die
;
15105 const gdb_byte
*cur_ptr
;
15108 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15111 *new_info_ptr
= cur_ptr
;
15114 store_in_ref_table (die
, reader
->cu
);
15117 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15121 *new_info_ptr
= cur_ptr
;
15124 die
->sibling
= NULL
;
15125 die
->parent
= parent
;
15129 /* Read a die, all of its descendents, and all of its siblings; set
15130 all of the fields of all of the dies correctly. Arguments are as
15131 in read_die_and_children. */
15133 static struct die_info
*
15134 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15135 const gdb_byte
*info_ptr
,
15136 const gdb_byte
**new_info_ptr
,
15137 struct die_info
*parent
)
15139 struct die_info
*first_die
, *last_sibling
;
15140 const gdb_byte
*cur_ptr
;
15142 cur_ptr
= info_ptr
;
15143 first_die
= last_sibling
= NULL
;
15147 struct die_info
*die
15148 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15152 *new_info_ptr
= cur_ptr
;
15159 last_sibling
->sibling
= die
;
15161 last_sibling
= die
;
15165 /* Read a die, all of its descendents, and all of its siblings; set
15166 all of the fields of all of the dies correctly. Arguments are as
15167 in read_die_and_children.
15168 This the main entry point for reading a DIE and all its children. */
15170 static struct die_info
*
15171 read_die_and_siblings (const struct die_reader_specs
*reader
,
15172 const gdb_byte
*info_ptr
,
15173 const gdb_byte
**new_info_ptr
,
15174 struct die_info
*parent
)
15176 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15177 new_info_ptr
, parent
);
15179 if (dwarf_die_debug
)
15181 fprintf_unfiltered (gdb_stdlog
,
15182 "Read die from %s@0x%x of %s:\n",
15183 get_section_name (reader
->die_section
),
15184 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15185 bfd_get_filename (reader
->abfd
));
15186 dump_die (die
, dwarf_die_debug
);
15192 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15194 The caller is responsible for filling in the extra attributes
15195 and updating (*DIEP)->num_attrs.
15196 Set DIEP to point to a newly allocated die with its information,
15197 except for its child, sibling, and parent fields.
15198 Set HAS_CHILDREN to tell whether the die has children or not. */
15200 static const gdb_byte
*
15201 read_full_die_1 (const struct die_reader_specs
*reader
,
15202 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15203 int *has_children
, int num_extra_attrs
)
15205 unsigned int abbrev_number
, bytes_read
, i
;
15206 sect_offset offset
;
15207 struct abbrev_info
*abbrev
;
15208 struct die_info
*die
;
15209 struct dwarf2_cu
*cu
= reader
->cu
;
15210 bfd
*abfd
= reader
->abfd
;
15212 offset
.sect_off
= info_ptr
- reader
->buffer
;
15213 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15214 info_ptr
+= bytes_read
;
15215 if (!abbrev_number
)
15222 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15224 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15226 bfd_get_filename (abfd
));
15228 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15229 die
->offset
= offset
;
15230 die
->tag
= abbrev
->tag
;
15231 die
->abbrev
= abbrev_number
;
15233 /* Make the result usable.
15234 The caller needs to update num_attrs after adding the extra
15236 die
->num_attrs
= abbrev
->num_attrs
;
15238 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15239 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15243 *has_children
= abbrev
->has_children
;
15247 /* Read a die and all its attributes.
15248 Set DIEP to point to a newly allocated die with its information,
15249 except for its child, sibling, and parent fields.
15250 Set HAS_CHILDREN to tell whether the die has children or not. */
15252 static const gdb_byte
*
15253 read_full_die (const struct die_reader_specs
*reader
,
15254 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15257 const gdb_byte
*result
;
15259 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15261 if (dwarf_die_debug
)
15263 fprintf_unfiltered (gdb_stdlog
,
15264 "Read die from %s@0x%x of %s:\n",
15265 get_section_name (reader
->die_section
),
15266 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15267 bfd_get_filename (reader
->abfd
));
15268 dump_die (*diep
, dwarf_die_debug
);
15274 /* Abbreviation tables.
15276 In DWARF version 2, the description of the debugging information is
15277 stored in a separate .debug_abbrev section. Before we read any
15278 dies from a section we read in all abbreviations and install them
15279 in a hash table. */
15281 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15283 static struct abbrev_info
*
15284 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15286 struct abbrev_info
*abbrev
;
15288 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15289 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15294 /* Add an abbreviation to the table. */
15297 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15298 unsigned int abbrev_number
,
15299 struct abbrev_info
*abbrev
)
15301 unsigned int hash_number
;
15303 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15304 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15305 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15308 /* Look up an abbrev in the table.
15309 Returns NULL if the abbrev is not found. */
15311 static struct abbrev_info
*
15312 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15313 unsigned int abbrev_number
)
15315 unsigned int hash_number
;
15316 struct abbrev_info
*abbrev
;
15318 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15319 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15323 if (abbrev
->number
== abbrev_number
)
15325 abbrev
= abbrev
->next
;
15330 /* Read in an abbrev table. */
15332 static struct abbrev_table
*
15333 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15334 sect_offset offset
)
15336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15337 bfd
*abfd
= get_section_bfd_owner (section
);
15338 struct abbrev_table
*abbrev_table
;
15339 const gdb_byte
*abbrev_ptr
;
15340 struct abbrev_info
*cur_abbrev
;
15341 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15342 unsigned int abbrev_form
;
15343 struct attr_abbrev
*cur_attrs
;
15344 unsigned int allocated_attrs
;
15346 abbrev_table
= XNEW (struct abbrev_table
);
15347 abbrev_table
->offset
= offset
;
15348 obstack_init (&abbrev_table
->abbrev_obstack
);
15349 abbrev_table
->abbrevs
=
15350 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15352 memset (abbrev_table
->abbrevs
, 0,
15353 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15355 dwarf2_read_section (objfile
, section
);
15356 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15357 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15358 abbrev_ptr
+= bytes_read
;
15360 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15361 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15363 /* Loop until we reach an abbrev number of 0. */
15364 while (abbrev_number
)
15366 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15368 /* read in abbrev header */
15369 cur_abbrev
->number
= abbrev_number
;
15371 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15372 abbrev_ptr
+= bytes_read
;
15373 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15376 /* now read in declarations */
15377 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15378 abbrev_ptr
+= bytes_read
;
15379 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15380 abbrev_ptr
+= bytes_read
;
15381 while (abbrev_name
)
15383 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15385 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15387 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15390 cur_attrs
[cur_abbrev
->num_attrs
].name
15391 = (enum dwarf_attribute
) abbrev_name
;
15392 cur_attrs
[cur_abbrev
->num_attrs
++].form
15393 = (enum dwarf_form
) abbrev_form
;
15394 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15395 abbrev_ptr
+= bytes_read
;
15396 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15397 abbrev_ptr
+= bytes_read
;
15400 cur_abbrev
->attrs
=
15401 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15402 cur_abbrev
->num_attrs
);
15403 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15404 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15406 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15408 /* Get next abbreviation.
15409 Under Irix6 the abbreviations for a compilation unit are not
15410 always properly terminated with an abbrev number of 0.
15411 Exit loop if we encounter an abbreviation which we have
15412 already read (which means we are about to read the abbreviations
15413 for the next compile unit) or if the end of the abbreviation
15414 table is reached. */
15415 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15417 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15418 abbrev_ptr
+= bytes_read
;
15419 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15424 return abbrev_table
;
15427 /* Free the resources held by ABBREV_TABLE. */
15430 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15432 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15433 xfree (abbrev_table
);
15436 /* Same as abbrev_table_free but as a cleanup.
15437 We pass in a pointer to the pointer to the table so that we can
15438 set the pointer to NULL when we're done. It also simplifies
15439 build_type_psymtabs_1. */
15442 abbrev_table_free_cleanup (void *table_ptr
)
15444 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15446 if (*abbrev_table_ptr
!= NULL
)
15447 abbrev_table_free (*abbrev_table_ptr
);
15448 *abbrev_table_ptr
= NULL
;
15451 /* Read the abbrev table for CU from ABBREV_SECTION. */
15454 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15455 struct dwarf2_section_info
*abbrev_section
)
15458 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15461 /* Release the memory used by the abbrev table for a compilation unit. */
15464 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15466 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15468 if (cu
->abbrev_table
!= NULL
)
15469 abbrev_table_free (cu
->abbrev_table
);
15470 /* Set this to NULL so that we SEGV if we try to read it later,
15471 and also because free_comp_unit verifies this is NULL. */
15472 cu
->abbrev_table
= NULL
;
15475 /* Returns nonzero if TAG represents a type that we might generate a partial
15479 is_type_tag_for_partial (int tag
)
15484 /* Some types that would be reasonable to generate partial symbols for,
15485 that we don't at present. */
15486 case DW_TAG_array_type
:
15487 case DW_TAG_file_type
:
15488 case DW_TAG_ptr_to_member_type
:
15489 case DW_TAG_set_type
:
15490 case DW_TAG_string_type
:
15491 case DW_TAG_subroutine_type
:
15493 case DW_TAG_base_type
:
15494 case DW_TAG_class_type
:
15495 case DW_TAG_interface_type
:
15496 case DW_TAG_enumeration_type
:
15497 case DW_TAG_structure_type
:
15498 case DW_TAG_subrange_type
:
15499 case DW_TAG_typedef
:
15500 case DW_TAG_union_type
:
15507 /* Load all DIEs that are interesting for partial symbols into memory. */
15509 static struct partial_die_info
*
15510 load_partial_dies (const struct die_reader_specs
*reader
,
15511 const gdb_byte
*info_ptr
, int building_psymtab
)
15513 struct dwarf2_cu
*cu
= reader
->cu
;
15514 struct objfile
*objfile
= cu
->objfile
;
15515 struct partial_die_info
*part_die
;
15516 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15517 struct abbrev_info
*abbrev
;
15518 unsigned int bytes_read
;
15519 unsigned int load_all
= 0;
15520 int nesting_level
= 1;
15525 gdb_assert (cu
->per_cu
!= NULL
);
15526 if (cu
->per_cu
->load_all_dies
)
15530 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15534 &cu
->comp_unit_obstack
,
15535 hashtab_obstack_allocate
,
15536 dummy_obstack_deallocate
);
15538 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15542 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15544 /* A NULL abbrev means the end of a series of children. */
15545 if (abbrev
== NULL
)
15547 if (--nesting_level
== 0)
15549 /* PART_DIE was probably the last thing allocated on the
15550 comp_unit_obstack, so we could call obstack_free
15551 here. We don't do that because the waste is small,
15552 and will be cleaned up when we're done with this
15553 compilation unit. This way, we're also more robust
15554 against other users of the comp_unit_obstack. */
15557 info_ptr
+= bytes_read
;
15558 last_die
= parent_die
;
15559 parent_die
= parent_die
->die_parent
;
15563 /* Check for template arguments. We never save these; if
15564 they're seen, we just mark the parent, and go on our way. */
15565 if (parent_die
!= NULL
15566 && cu
->language
== language_cplus
15567 && (abbrev
->tag
== DW_TAG_template_type_param
15568 || abbrev
->tag
== DW_TAG_template_value_param
))
15570 parent_die
->has_template_arguments
= 1;
15574 /* We don't need a partial DIE for the template argument. */
15575 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15580 /* We only recurse into c++ subprograms looking for template arguments.
15581 Skip their other children. */
15583 && cu
->language
== language_cplus
15584 && parent_die
!= NULL
15585 && parent_die
->tag
== DW_TAG_subprogram
)
15587 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15591 /* Check whether this DIE is interesting enough to save. Normally
15592 we would not be interested in members here, but there may be
15593 later variables referencing them via DW_AT_specification (for
15594 static members). */
15596 && !is_type_tag_for_partial (abbrev
->tag
)
15597 && abbrev
->tag
!= DW_TAG_constant
15598 && abbrev
->tag
!= DW_TAG_enumerator
15599 && abbrev
->tag
!= DW_TAG_subprogram
15600 && abbrev
->tag
!= DW_TAG_lexical_block
15601 && abbrev
->tag
!= DW_TAG_variable
15602 && abbrev
->tag
!= DW_TAG_namespace
15603 && abbrev
->tag
!= DW_TAG_module
15604 && abbrev
->tag
!= DW_TAG_member
15605 && abbrev
->tag
!= DW_TAG_imported_unit
15606 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15608 /* Otherwise we skip to the next sibling, if any. */
15609 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15613 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15616 /* This two-pass algorithm for processing partial symbols has a
15617 high cost in cache pressure. Thus, handle some simple cases
15618 here which cover the majority of C partial symbols. DIEs
15619 which neither have specification tags in them, nor could have
15620 specification tags elsewhere pointing at them, can simply be
15621 processed and discarded.
15623 This segment is also optional; scan_partial_symbols and
15624 add_partial_symbol will handle these DIEs if we chain
15625 them in normally. When compilers which do not emit large
15626 quantities of duplicate debug information are more common,
15627 this code can probably be removed. */
15629 /* Any complete simple types at the top level (pretty much all
15630 of them, for a language without namespaces), can be processed
15632 if (parent_die
== NULL
15633 && part_die
->has_specification
== 0
15634 && part_die
->is_declaration
== 0
15635 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15636 || part_die
->tag
== DW_TAG_base_type
15637 || part_die
->tag
== DW_TAG_subrange_type
))
15639 if (building_psymtab
&& part_die
->name
!= NULL
)
15640 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15641 VAR_DOMAIN
, LOC_TYPEDEF
,
15642 &objfile
->static_psymbols
,
15643 0, cu
->language
, objfile
);
15644 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15648 /* The exception for DW_TAG_typedef with has_children above is
15649 a workaround of GCC PR debug/47510. In the case of this complaint
15650 type_name_no_tag_or_error will error on such types later.
15652 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15653 it could not find the child DIEs referenced later, this is checked
15654 above. In correct DWARF DW_TAG_typedef should have no children. */
15656 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15657 complaint (&symfile_complaints
,
15658 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15659 "- DIE at 0x%x [in module %s]"),
15660 part_die
->offset
.sect_off
, objfile_name (objfile
));
15662 /* If we're at the second level, and we're an enumerator, and
15663 our parent has no specification (meaning possibly lives in a
15664 namespace elsewhere), then we can add the partial symbol now
15665 instead of queueing it. */
15666 if (part_die
->tag
== DW_TAG_enumerator
15667 && parent_die
!= NULL
15668 && parent_die
->die_parent
== NULL
15669 && parent_die
->tag
== DW_TAG_enumeration_type
15670 && parent_die
->has_specification
== 0)
15672 if (part_die
->name
== NULL
)
15673 complaint (&symfile_complaints
,
15674 _("malformed enumerator DIE ignored"));
15675 else if (building_psymtab
)
15676 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15677 VAR_DOMAIN
, LOC_CONST
,
15678 (cu
->language
== language_cplus
15679 || cu
->language
== language_java
)
15680 ? &objfile
->global_psymbols
15681 : &objfile
->static_psymbols
,
15682 0, cu
->language
, objfile
);
15684 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15688 /* We'll save this DIE so link it in. */
15689 part_die
->die_parent
= parent_die
;
15690 part_die
->die_sibling
= NULL
;
15691 part_die
->die_child
= NULL
;
15693 if (last_die
&& last_die
== parent_die
)
15694 last_die
->die_child
= part_die
;
15696 last_die
->die_sibling
= part_die
;
15698 last_die
= part_die
;
15700 if (first_die
== NULL
)
15701 first_die
= part_die
;
15703 /* Maybe add the DIE to the hash table. Not all DIEs that we
15704 find interesting need to be in the hash table, because we
15705 also have the parent/sibling/child chains; only those that we
15706 might refer to by offset later during partial symbol reading.
15708 For now this means things that might have be the target of a
15709 DW_AT_specification, DW_AT_abstract_origin, or
15710 DW_AT_extension. DW_AT_extension will refer only to
15711 namespaces; DW_AT_abstract_origin refers to functions (and
15712 many things under the function DIE, but we do not recurse
15713 into function DIEs during partial symbol reading) and
15714 possibly variables as well; DW_AT_specification refers to
15715 declarations. Declarations ought to have the DW_AT_declaration
15716 flag. It happens that GCC forgets to put it in sometimes, but
15717 only for functions, not for types.
15719 Adding more things than necessary to the hash table is harmless
15720 except for the performance cost. Adding too few will result in
15721 wasted time in find_partial_die, when we reread the compilation
15722 unit with load_all_dies set. */
15725 || abbrev
->tag
== DW_TAG_constant
15726 || abbrev
->tag
== DW_TAG_subprogram
15727 || abbrev
->tag
== DW_TAG_variable
15728 || abbrev
->tag
== DW_TAG_namespace
15729 || part_die
->is_declaration
)
15733 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15734 part_die
->offset
.sect_off
, INSERT
);
15738 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15740 /* For some DIEs we want to follow their children (if any). For C
15741 we have no reason to follow the children of structures; for other
15742 languages we have to, so that we can get at method physnames
15743 to infer fully qualified class names, for DW_AT_specification,
15744 and for C++ template arguments. For C++, we also look one level
15745 inside functions to find template arguments (if the name of the
15746 function does not already contain the template arguments).
15748 For Ada, we need to scan the children of subprograms and lexical
15749 blocks as well because Ada allows the definition of nested
15750 entities that could be interesting for the debugger, such as
15751 nested subprograms for instance. */
15752 if (last_die
->has_children
15754 || last_die
->tag
== DW_TAG_namespace
15755 || last_die
->tag
== DW_TAG_module
15756 || last_die
->tag
== DW_TAG_enumeration_type
15757 || (cu
->language
== language_cplus
15758 && last_die
->tag
== DW_TAG_subprogram
15759 && (last_die
->name
== NULL
15760 || strchr (last_die
->name
, '<') == NULL
))
15761 || (cu
->language
!= language_c
15762 && (last_die
->tag
== DW_TAG_class_type
15763 || last_die
->tag
== DW_TAG_interface_type
15764 || last_die
->tag
== DW_TAG_structure_type
15765 || last_die
->tag
== DW_TAG_union_type
))
15766 || (cu
->language
== language_ada
15767 && (last_die
->tag
== DW_TAG_subprogram
15768 || last_die
->tag
== DW_TAG_lexical_block
))))
15771 parent_die
= last_die
;
15775 /* Otherwise we skip to the next sibling, if any. */
15776 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15778 /* Back to the top, do it again. */
15782 /* Read a minimal amount of information into the minimal die structure. */
15784 static const gdb_byte
*
15785 read_partial_die (const struct die_reader_specs
*reader
,
15786 struct partial_die_info
*part_die
,
15787 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15788 const gdb_byte
*info_ptr
)
15790 struct dwarf2_cu
*cu
= reader
->cu
;
15791 struct objfile
*objfile
= cu
->objfile
;
15792 const gdb_byte
*buffer
= reader
->buffer
;
15794 struct attribute attr
;
15795 int has_low_pc_attr
= 0;
15796 int has_high_pc_attr
= 0;
15797 int high_pc_relative
= 0;
15799 memset (part_die
, 0, sizeof (struct partial_die_info
));
15801 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15803 info_ptr
+= abbrev_len
;
15805 if (abbrev
== NULL
)
15808 part_die
->tag
= abbrev
->tag
;
15809 part_die
->has_children
= abbrev
->has_children
;
15811 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15813 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15815 /* Store the data if it is of an attribute we want to keep in a
15816 partial symbol table. */
15820 switch (part_die
->tag
)
15822 case DW_TAG_compile_unit
:
15823 case DW_TAG_partial_unit
:
15824 case DW_TAG_type_unit
:
15825 /* Compilation units have a DW_AT_name that is a filename, not
15826 a source language identifier. */
15827 case DW_TAG_enumeration_type
:
15828 case DW_TAG_enumerator
:
15829 /* These tags always have simple identifiers already; no need
15830 to canonicalize them. */
15831 part_die
->name
= DW_STRING (&attr
);
15835 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15836 &objfile
->per_bfd
->storage_obstack
);
15840 case DW_AT_linkage_name
:
15841 case DW_AT_MIPS_linkage_name
:
15842 /* Note that both forms of linkage name might appear. We
15843 assume they will be the same, and we only store the last
15845 if (cu
->language
== language_ada
)
15846 part_die
->name
= DW_STRING (&attr
);
15847 part_die
->linkage_name
= DW_STRING (&attr
);
15850 has_low_pc_attr
= 1;
15851 part_die
->lowpc
= attr_value_as_address (&attr
);
15853 case DW_AT_high_pc
:
15854 has_high_pc_attr
= 1;
15855 part_die
->highpc
= attr_value_as_address (&attr
);
15856 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15857 high_pc_relative
= 1;
15859 case DW_AT_location
:
15860 /* Support the .debug_loc offsets. */
15861 if (attr_form_is_block (&attr
))
15863 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15865 else if (attr_form_is_section_offset (&attr
))
15867 dwarf2_complex_location_expr_complaint ();
15871 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15872 "partial symbol information");
15875 case DW_AT_external
:
15876 part_die
->is_external
= DW_UNSND (&attr
);
15878 case DW_AT_declaration
:
15879 part_die
->is_declaration
= DW_UNSND (&attr
);
15882 part_die
->has_type
= 1;
15884 case DW_AT_abstract_origin
:
15885 case DW_AT_specification
:
15886 case DW_AT_extension
:
15887 part_die
->has_specification
= 1;
15888 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15889 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15890 || cu
->per_cu
->is_dwz
);
15892 case DW_AT_sibling
:
15893 /* Ignore absolute siblings, they might point outside of
15894 the current compile unit. */
15895 if (attr
.form
== DW_FORM_ref_addr
)
15896 complaint (&symfile_complaints
,
15897 _("ignoring absolute DW_AT_sibling"));
15900 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15901 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15903 if (sibling_ptr
< info_ptr
)
15904 complaint (&symfile_complaints
,
15905 _("DW_AT_sibling points backwards"));
15906 else if (sibling_ptr
> reader
->buffer_end
)
15907 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15909 part_die
->sibling
= sibling_ptr
;
15912 case DW_AT_byte_size
:
15913 part_die
->has_byte_size
= 1;
15915 case DW_AT_const_value
:
15916 part_die
->has_const_value
= 1;
15918 case DW_AT_calling_convention
:
15919 /* DWARF doesn't provide a way to identify a program's source-level
15920 entry point. DW_AT_calling_convention attributes are only meant
15921 to describe functions' calling conventions.
15923 However, because it's a necessary piece of information in
15924 Fortran, and because DW_CC_program is the only piece of debugging
15925 information whose definition refers to a 'main program' at all,
15926 several compilers have begun marking Fortran main programs with
15927 DW_CC_program --- even when those functions use the standard
15928 calling conventions.
15930 So until DWARF specifies a way to provide this information and
15931 compilers pick up the new representation, we'll support this
15933 if (DW_UNSND (&attr
) == DW_CC_program
15934 && cu
->language
== language_fortran
)
15935 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15938 if (DW_UNSND (&attr
) == DW_INL_inlined
15939 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15940 part_die
->may_be_inlined
= 1;
15944 if (part_die
->tag
== DW_TAG_imported_unit
)
15946 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15947 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15948 || cu
->per_cu
->is_dwz
);
15957 if (high_pc_relative
)
15958 part_die
->highpc
+= part_die
->lowpc
;
15960 if (has_low_pc_attr
&& has_high_pc_attr
)
15962 /* When using the GNU linker, .gnu.linkonce. sections are used to
15963 eliminate duplicate copies of functions and vtables and such.
15964 The linker will arbitrarily choose one and discard the others.
15965 The AT_*_pc values for such functions refer to local labels in
15966 these sections. If the section from that file was discarded, the
15967 labels are not in the output, so the relocs get a value of 0.
15968 If this is a discarded function, mark the pc bounds as invalid,
15969 so that GDB will ignore it. */
15970 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15972 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15974 complaint (&symfile_complaints
,
15975 _("DW_AT_low_pc %s is zero "
15976 "for DIE at 0x%x [in module %s]"),
15977 paddress (gdbarch
, part_die
->lowpc
),
15978 part_die
->offset
.sect_off
, objfile_name (objfile
));
15980 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15981 else if (part_die
->lowpc
>= part_die
->highpc
)
15983 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15985 complaint (&symfile_complaints
,
15986 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15987 "for DIE at 0x%x [in module %s]"),
15988 paddress (gdbarch
, part_die
->lowpc
),
15989 paddress (gdbarch
, part_die
->highpc
),
15990 part_die
->offset
.sect_off
, objfile_name (objfile
));
15993 part_die
->has_pc_info
= 1;
15999 /* Find a cached partial DIE at OFFSET in CU. */
16001 static struct partial_die_info
*
16002 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16004 struct partial_die_info
*lookup_die
= NULL
;
16005 struct partial_die_info part_die
;
16007 part_die
.offset
= offset
;
16008 lookup_die
= ((struct partial_die_info
*)
16009 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16015 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16016 except in the case of .debug_types DIEs which do not reference
16017 outside their CU (they do however referencing other types via
16018 DW_FORM_ref_sig8). */
16020 static struct partial_die_info
*
16021 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16023 struct objfile
*objfile
= cu
->objfile
;
16024 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16025 struct partial_die_info
*pd
= NULL
;
16027 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16028 && offset_in_cu_p (&cu
->header
, offset
))
16030 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16033 /* We missed recording what we needed.
16034 Load all dies and try again. */
16035 per_cu
= cu
->per_cu
;
16039 /* TUs don't reference other CUs/TUs (except via type signatures). */
16040 if (cu
->per_cu
->is_debug_types
)
16042 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16043 " external reference to offset 0x%lx [in module %s].\n"),
16044 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16045 bfd_get_filename (objfile
->obfd
));
16047 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16050 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16051 load_partial_comp_unit (per_cu
);
16053 per_cu
->cu
->last_used
= 0;
16054 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16057 /* If we didn't find it, and not all dies have been loaded,
16058 load them all and try again. */
16060 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16062 per_cu
->load_all_dies
= 1;
16064 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16065 THIS_CU->cu may already be in use. So we can't just free it and
16066 replace its DIEs with the ones we read in. Instead, we leave those
16067 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16068 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16070 load_partial_comp_unit (per_cu
);
16072 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16076 internal_error (__FILE__
, __LINE__
,
16077 _("could not find partial DIE 0x%x "
16078 "in cache [from module %s]\n"),
16079 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16083 /* See if we can figure out if the class lives in a namespace. We do
16084 this by looking for a member function; its demangled name will
16085 contain namespace info, if there is any. */
16088 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16089 struct dwarf2_cu
*cu
)
16091 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16092 what template types look like, because the demangler
16093 frequently doesn't give the same name as the debug info. We
16094 could fix this by only using the demangled name to get the
16095 prefix (but see comment in read_structure_type). */
16097 struct partial_die_info
*real_pdi
;
16098 struct partial_die_info
*child_pdi
;
16100 /* If this DIE (this DIE's specification, if any) has a parent, then
16101 we should not do this. We'll prepend the parent's fully qualified
16102 name when we create the partial symbol. */
16104 real_pdi
= struct_pdi
;
16105 while (real_pdi
->has_specification
)
16106 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16107 real_pdi
->spec_is_dwz
, cu
);
16109 if (real_pdi
->die_parent
!= NULL
)
16112 for (child_pdi
= struct_pdi
->die_child
;
16114 child_pdi
= child_pdi
->die_sibling
)
16116 if (child_pdi
->tag
== DW_TAG_subprogram
16117 && child_pdi
->linkage_name
!= NULL
)
16119 char *actual_class_name
16120 = language_class_name_from_physname (cu
->language_defn
,
16121 child_pdi
->linkage_name
);
16122 if (actual_class_name
!= NULL
)
16126 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16128 strlen (actual_class_name
)));
16129 xfree (actual_class_name
);
16136 /* Adjust PART_DIE before generating a symbol for it. This function
16137 may set the is_external flag or change the DIE's name. */
16140 fixup_partial_die (struct partial_die_info
*part_die
,
16141 struct dwarf2_cu
*cu
)
16143 /* Once we've fixed up a die, there's no point in doing so again.
16144 This also avoids a memory leak if we were to call
16145 guess_partial_die_structure_name multiple times. */
16146 if (part_die
->fixup_called
)
16149 /* If we found a reference attribute and the DIE has no name, try
16150 to find a name in the referred to DIE. */
16152 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16154 struct partial_die_info
*spec_die
;
16156 spec_die
= find_partial_die (part_die
->spec_offset
,
16157 part_die
->spec_is_dwz
, cu
);
16159 fixup_partial_die (spec_die
, cu
);
16161 if (spec_die
->name
)
16163 part_die
->name
= spec_die
->name
;
16165 /* Copy DW_AT_external attribute if it is set. */
16166 if (spec_die
->is_external
)
16167 part_die
->is_external
= spec_die
->is_external
;
16171 /* Set default names for some unnamed DIEs. */
16173 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16174 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16176 /* If there is no parent die to provide a namespace, and there are
16177 children, see if we can determine the namespace from their linkage
16179 if (cu
->language
== language_cplus
16180 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16181 && part_die
->die_parent
== NULL
16182 && part_die
->has_children
16183 && (part_die
->tag
== DW_TAG_class_type
16184 || part_die
->tag
== DW_TAG_structure_type
16185 || part_die
->tag
== DW_TAG_union_type
))
16186 guess_partial_die_structure_name (part_die
, cu
);
16188 /* GCC might emit a nameless struct or union that has a linkage
16189 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16190 if (part_die
->name
== NULL
16191 && (part_die
->tag
== DW_TAG_class_type
16192 || part_die
->tag
== DW_TAG_interface_type
16193 || part_die
->tag
== DW_TAG_structure_type
16194 || part_die
->tag
== DW_TAG_union_type
)
16195 && part_die
->linkage_name
!= NULL
)
16199 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16204 /* Strip any leading namespaces/classes, keep only the base name.
16205 DW_AT_name for named DIEs does not contain the prefixes. */
16206 base
= strrchr (demangled
, ':');
16207 if (base
&& base
> demangled
&& base
[-1] == ':')
16214 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16215 base
, strlen (base
)));
16220 part_die
->fixup_called
= 1;
16223 /* Read an attribute value described by an attribute form. */
16225 static const gdb_byte
*
16226 read_attribute_value (const struct die_reader_specs
*reader
,
16227 struct attribute
*attr
, unsigned form
,
16228 const gdb_byte
*info_ptr
)
16230 struct dwarf2_cu
*cu
= reader
->cu
;
16231 struct objfile
*objfile
= cu
->objfile
;
16232 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16233 bfd
*abfd
= reader
->abfd
;
16234 struct comp_unit_head
*cu_header
= &cu
->header
;
16235 unsigned int bytes_read
;
16236 struct dwarf_block
*blk
;
16238 attr
->form
= (enum dwarf_form
) form
;
16241 case DW_FORM_ref_addr
:
16242 if (cu
->header
.version
== 2)
16243 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16245 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16246 &cu
->header
, &bytes_read
);
16247 info_ptr
+= bytes_read
;
16249 case DW_FORM_GNU_ref_alt
:
16250 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16251 info_ptr
+= bytes_read
;
16254 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16255 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16256 info_ptr
+= bytes_read
;
16258 case DW_FORM_block2
:
16259 blk
= dwarf_alloc_block (cu
);
16260 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16262 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16263 info_ptr
+= blk
->size
;
16264 DW_BLOCK (attr
) = blk
;
16266 case DW_FORM_block4
:
16267 blk
= dwarf_alloc_block (cu
);
16268 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16270 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16271 info_ptr
+= blk
->size
;
16272 DW_BLOCK (attr
) = blk
;
16274 case DW_FORM_data2
:
16275 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16278 case DW_FORM_data4
:
16279 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16282 case DW_FORM_data8
:
16283 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16286 case DW_FORM_sec_offset
:
16287 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16288 info_ptr
+= bytes_read
;
16290 case DW_FORM_string
:
16291 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16292 DW_STRING_IS_CANONICAL (attr
) = 0;
16293 info_ptr
+= bytes_read
;
16296 if (!cu
->per_cu
->is_dwz
)
16298 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16300 DW_STRING_IS_CANONICAL (attr
) = 0;
16301 info_ptr
+= bytes_read
;
16305 case DW_FORM_GNU_strp_alt
:
16307 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16308 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16311 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16312 DW_STRING_IS_CANONICAL (attr
) = 0;
16313 info_ptr
+= bytes_read
;
16316 case DW_FORM_exprloc
:
16317 case DW_FORM_block
:
16318 blk
= dwarf_alloc_block (cu
);
16319 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16320 info_ptr
+= bytes_read
;
16321 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16322 info_ptr
+= blk
->size
;
16323 DW_BLOCK (attr
) = blk
;
16325 case DW_FORM_block1
:
16326 blk
= dwarf_alloc_block (cu
);
16327 blk
->size
= read_1_byte (abfd
, info_ptr
);
16329 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16330 info_ptr
+= blk
->size
;
16331 DW_BLOCK (attr
) = blk
;
16333 case DW_FORM_data1
:
16334 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16338 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16341 case DW_FORM_flag_present
:
16342 DW_UNSND (attr
) = 1;
16344 case DW_FORM_sdata
:
16345 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16346 info_ptr
+= bytes_read
;
16348 case DW_FORM_udata
:
16349 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16350 info_ptr
+= bytes_read
;
16353 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16354 + read_1_byte (abfd
, info_ptr
));
16358 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16359 + read_2_bytes (abfd
, info_ptr
));
16363 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16364 + read_4_bytes (abfd
, info_ptr
));
16368 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16369 + read_8_bytes (abfd
, info_ptr
));
16372 case DW_FORM_ref_sig8
:
16373 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16376 case DW_FORM_ref_udata
:
16377 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16378 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16379 info_ptr
+= bytes_read
;
16381 case DW_FORM_indirect
:
16382 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16383 info_ptr
+= bytes_read
;
16384 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16386 case DW_FORM_GNU_addr_index
:
16387 if (reader
->dwo_file
== NULL
)
16389 /* For now flag a hard error.
16390 Later we can turn this into a complaint. */
16391 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16392 dwarf_form_name (form
),
16393 bfd_get_filename (abfd
));
16395 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16396 info_ptr
+= bytes_read
;
16398 case DW_FORM_GNU_str_index
:
16399 if (reader
->dwo_file
== NULL
)
16401 /* For now flag a hard error.
16402 Later we can turn this into a complaint if warranted. */
16403 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16404 dwarf_form_name (form
),
16405 bfd_get_filename (abfd
));
16408 ULONGEST str_index
=
16409 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16411 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16412 DW_STRING_IS_CANONICAL (attr
) = 0;
16413 info_ptr
+= bytes_read
;
16417 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16418 dwarf_form_name (form
),
16419 bfd_get_filename (abfd
));
16423 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16424 attr
->form
= DW_FORM_GNU_ref_alt
;
16426 /* We have seen instances where the compiler tried to emit a byte
16427 size attribute of -1 which ended up being encoded as an unsigned
16428 0xffffffff. Although 0xffffffff is technically a valid size value,
16429 an object of this size seems pretty unlikely so we can relatively
16430 safely treat these cases as if the size attribute was invalid and
16431 treat them as zero by default. */
16432 if (attr
->name
== DW_AT_byte_size
16433 && form
== DW_FORM_data4
16434 && DW_UNSND (attr
) >= 0xffffffff)
16437 (&symfile_complaints
,
16438 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16439 hex_string (DW_UNSND (attr
)));
16440 DW_UNSND (attr
) = 0;
16446 /* Read an attribute described by an abbreviated attribute. */
16448 static const gdb_byte
*
16449 read_attribute (const struct die_reader_specs
*reader
,
16450 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16451 const gdb_byte
*info_ptr
)
16453 attr
->name
= abbrev
->name
;
16454 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16457 /* Read dwarf information from a buffer. */
16459 static unsigned int
16460 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16462 return bfd_get_8 (abfd
, buf
);
16466 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16468 return bfd_get_signed_8 (abfd
, buf
);
16471 static unsigned int
16472 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16474 return bfd_get_16 (abfd
, buf
);
16478 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16480 return bfd_get_signed_16 (abfd
, buf
);
16483 static unsigned int
16484 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16486 return bfd_get_32 (abfd
, buf
);
16490 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16492 return bfd_get_signed_32 (abfd
, buf
);
16496 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16498 return bfd_get_64 (abfd
, buf
);
16502 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16503 unsigned int *bytes_read
)
16505 struct comp_unit_head
*cu_header
= &cu
->header
;
16506 CORE_ADDR retval
= 0;
16508 if (cu_header
->signed_addr_p
)
16510 switch (cu_header
->addr_size
)
16513 retval
= bfd_get_signed_16 (abfd
, buf
);
16516 retval
= bfd_get_signed_32 (abfd
, buf
);
16519 retval
= bfd_get_signed_64 (abfd
, buf
);
16522 internal_error (__FILE__
, __LINE__
,
16523 _("read_address: bad switch, signed [in module %s]"),
16524 bfd_get_filename (abfd
));
16529 switch (cu_header
->addr_size
)
16532 retval
= bfd_get_16 (abfd
, buf
);
16535 retval
= bfd_get_32 (abfd
, buf
);
16538 retval
= bfd_get_64 (abfd
, buf
);
16541 internal_error (__FILE__
, __LINE__
,
16542 _("read_address: bad switch, "
16543 "unsigned [in module %s]"),
16544 bfd_get_filename (abfd
));
16548 *bytes_read
= cu_header
->addr_size
;
16552 /* Read the initial length from a section. The (draft) DWARF 3
16553 specification allows the initial length to take up either 4 bytes
16554 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16555 bytes describe the length and all offsets will be 8 bytes in length
16558 An older, non-standard 64-bit format is also handled by this
16559 function. The older format in question stores the initial length
16560 as an 8-byte quantity without an escape value. Lengths greater
16561 than 2^32 aren't very common which means that the initial 4 bytes
16562 is almost always zero. Since a length value of zero doesn't make
16563 sense for the 32-bit format, this initial zero can be considered to
16564 be an escape value which indicates the presence of the older 64-bit
16565 format. As written, the code can't detect (old format) lengths
16566 greater than 4GB. If it becomes necessary to handle lengths
16567 somewhat larger than 4GB, we could allow other small values (such
16568 as the non-sensical values of 1, 2, and 3) to also be used as
16569 escape values indicating the presence of the old format.
16571 The value returned via bytes_read should be used to increment the
16572 relevant pointer after calling read_initial_length().
16574 [ Note: read_initial_length() and read_offset() are based on the
16575 document entitled "DWARF Debugging Information Format", revision
16576 3, draft 8, dated November 19, 2001. This document was obtained
16579 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16581 This document is only a draft and is subject to change. (So beware.)
16583 Details regarding the older, non-standard 64-bit format were
16584 determined empirically by examining 64-bit ELF files produced by
16585 the SGI toolchain on an IRIX 6.5 machine.
16587 - Kevin, July 16, 2002
16591 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16593 LONGEST length
= bfd_get_32 (abfd
, buf
);
16595 if (length
== 0xffffffff)
16597 length
= bfd_get_64 (abfd
, buf
+ 4);
16600 else if (length
== 0)
16602 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16603 length
= bfd_get_64 (abfd
, buf
);
16614 /* Cover function for read_initial_length.
16615 Returns the length of the object at BUF, and stores the size of the
16616 initial length in *BYTES_READ and stores the size that offsets will be in
16618 If the initial length size is not equivalent to that specified in
16619 CU_HEADER then issue a complaint.
16620 This is useful when reading non-comp-unit headers. */
16623 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16624 const struct comp_unit_head
*cu_header
,
16625 unsigned int *bytes_read
,
16626 unsigned int *offset_size
)
16628 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16630 gdb_assert (cu_header
->initial_length_size
== 4
16631 || cu_header
->initial_length_size
== 8
16632 || cu_header
->initial_length_size
== 12);
16634 if (cu_header
->initial_length_size
!= *bytes_read
)
16635 complaint (&symfile_complaints
,
16636 _("intermixed 32-bit and 64-bit DWARF sections"));
16638 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16642 /* Read an offset from the data stream. The size of the offset is
16643 given by cu_header->offset_size. */
16646 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16647 const struct comp_unit_head
*cu_header
,
16648 unsigned int *bytes_read
)
16650 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16652 *bytes_read
= cu_header
->offset_size
;
16656 /* Read an offset from the data stream. */
16659 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16661 LONGEST retval
= 0;
16663 switch (offset_size
)
16666 retval
= bfd_get_32 (abfd
, buf
);
16669 retval
= bfd_get_64 (abfd
, buf
);
16672 internal_error (__FILE__
, __LINE__
,
16673 _("read_offset_1: bad switch [in module %s]"),
16674 bfd_get_filename (abfd
));
16680 static const gdb_byte
*
16681 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16683 /* If the size of a host char is 8 bits, we can return a pointer
16684 to the buffer, otherwise we have to copy the data to a buffer
16685 allocated on the temporary obstack. */
16686 gdb_assert (HOST_CHAR_BIT
== 8);
16690 static const char *
16691 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16692 unsigned int *bytes_read_ptr
)
16694 /* If the size of a host char is 8 bits, we can return a pointer
16695 to the string, otherwise we have to copy the string to a buffer
16696 allocated on the temporary obstack. */
16697 gdb_assert (HOST_CHAR_BIT
== 8);
16700 *bytes_read_ptr
= 1;
16703 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16704 return (const char *) buf
;
16707 static const char *
16708 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16710 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16711 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16712 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16713 bfd_get_filename (abfd
));
16714 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16715 error (_("DW_FORM_strp pointing outside of "
16716 ".debug_str section [in module %s]"),
16717 bfd_get_filename (abfd
));
16718 gdb_assert (HOST_CHAR_BIT
== 8);
16719 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16721 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16724 /* Read a string at offset STR_OFFSET in the .debug_str section from
16725 the .dwz file DWZ. Throw an error if the offset is too large. If
16726 the string consists of a single NUL byte, return NULL; otherwise
16727 return a pointer to the string. */
16729 static const char *
16730 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16732 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16734 if (dwz
->str
.buffer
== NULL
)
16735 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16736 "section [in module %s]"),
16737 bfd_get_filename (dwz
->dwz_bfd
));
16738 if (str_offset
>= dwz
->str
.size
)
16739 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16740 ".debug_str section [in module %s]"),
16741 bfd_get_filename (dwz
->dwz_bfd
));
16742 gdb_assert (HOST_CHAR_BIT
== 8);
16743 if (dwz
->str
.buffer
[str_offset
] == '\0')
16745 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16748 static const char *
16749 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16750 const struct comp_unit_head
*cu_header
,
16751 unsigned int *bytes_read_ptr
)
16753 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16755 return read_indirect_string_at_offset (abfd
, str_offset
);
16759 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16760 unsigned int *bytes_read_ptr
)
16763 unsigned int num_read
;
16765 unsigned char byte
;
16773 byte
= bfd_get_8 (abfd
, buf
);
16776 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16777 if ((byte
& 128) == 0)
16783 *bytes_read_ptr
= num_read
;
16788 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16789 unsigned int *bytes_read_ptr
)
16792 int i
, shift
, num_read
;
16793 unsigned char byte
;
16801 byte
= bfd_get_8 (abfd
, buf
);
16804 result
|= ((LONGEST
) (byte
& 127) << shift
);
16806 if ((byte
& 128) == 0)
16811 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16812 result
|= -(((LONGEST
) 1) << shift
);
16813 *bytes_read_ptr
= num_read
;
16817 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16818 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16819 ADDR_SIZE is the size of addresses from the CU header. */
16822 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16824 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16825 bfd
*abfd
= objfile
->obfd
;
16826 const gdb_byte
*info_ptr
;
16828 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16829 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16830 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16831 objfile_name (objfile
));
16832 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16833 error (_("DW_FORM_addr_index pointing outside of "
16834 ".debug_addr section [in module %s]"),
16835 objfile_name (objfile
));
16836 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16837 + addr_base
+ addr_index
* addr_size
);
16838 if (addr_size
== 4)
16839 return bfd_get_32 (abfd
, info_ptr
);
16841 return bfd_get_64 (abfd
, info_ptr
);
16844 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16847 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16849 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16852 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16855 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16856 unsigned int *bytes_read
)
16858 bfd
*abfd
= cu
->objfile
->obfd
;
16859 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16861 return read_addr_index (cu
, addr_index
);
16864 /* Data structure to pass results from dwarf2_read_addr_index_reader
16865 back to dwarf2_read_addr_index. */
16867 struct dwarf2_read_addr_index_data
16869 ULONGEST addr_base
;
16873 /* die_reader_func for dwarf2_read_addr_index. */
16876 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16877 const gdb_byte
*info_ptr
,
16878 struct die_info
*comp_unit_die
,
16882 struct dwarf2_cu
*cu
= reader
->cu
;
16883 struct dwarf2_read_addr_index_data
*aidata
=
16884 (struct dwarf2_read_addr_index_data
*) data
;
16886 aidata
->addr_base
= cu
->addr_base
;
16887 aidata
->addr_size
= cu
->header
.addr_size
;
16890 /* Given an index in .debug_addr, fetch the value.
16891 NOTE: This can be called during dwarf expression evaluation,
16892 long after the debug information has been read, and thus per_cu->cu
16893 may no longer exist. */
16896 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16897 unsigned int addr_index
)
16899 struct objfile
*objfile
= per_cu
->objfile
;
16900 struct dwarf2_cu
*cu
= per_cu
->cu
;
16901 ULONGEST addr_base
;
16904 /* This is intended to be called from outside this file. */
16905 dw2_setup (objfile
);
16907 /* We need addr_base and addr_size.
16908 If we don't have PER_CU->cu, we have to get it.
16909 Nasty, but the alternative is storing the needed info in PER_CU,
16910 which at this point doesn't seem justified: it's not clear how frequently
16911 it would get used and it would increase the size of every PER_CU.
16912 Entry points like dwarf2_per_cu_addr_size do a similar thing
16913 so we're not in uncharted territory here.
16914 Alas we need to be a bit more complicated as addr_base is contained
16917 We don't need to read the entire CU(/TU).
16918 We just need the header and top level die.
16920 IWBN to use the aging mechanism to let us lazily later discard the CU.
16921 For now we skip this optimization. */
16925 addr_base
= cu
->addr_base
;
16926 addr_size
= cu
->header
.addr_size
;
16930 struct dwarf2_read_addr_index_data aidata
;
16932 /* Note: We can't use init_cutu_and_read_dies_simple here,
16933 we need addr_base. */
16934 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16935 dwarf2_read_addr_index_reader
, &aidata
);
16936 addr_base
= aidata
.addr_base
;
16937 addr_size
= aidata
.addr_size
;
16940 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16943 /* Given a DW_FORM_GNU_str_index, fetch the string.
16944 This is only used by the Fission support. */
16946 static const char *
16947 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16949 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16950 const char *objf_name
= objfile_name (objfile
);
16951 bfd
*abfd
= objfile
->obfd
;
16952 struct dwarf2_cu
*cu
= reader
->cu
;
16953 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16954 struct dwarf2_section_info
*str_offsets_section
=
16955 &reader
->dwo_file
->sections
.str_offsets
;
16956 const gdb_byte
*info_ptr
;
16957 ULONGEST str_offset
;
16958 static const char form_name
[] = "DW_FORM_GNU_str_index";
16960 dwarf2_read_section (objfile
, str_section
);
16961 dwarf2_read_section (objfile
, str_offsets_section
);
16962 if (str_section
->buffer
== NULL
)
16963 error (_("%s used without .debug_str.dwo section"
16964 " in CU at offset 0x%lx [in module %s]"),
16965 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16966 if (str_offsets_section
->buffer
== NULL
)
16967 error (_("%s used without .debug_str_offsets.dwo section"
16968 " in CU at offset 0x%lx [in module %s]"),
16969 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16970 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16971 error (_("%s pointing outside of .debug_str_offsets.dwo"
16972 " section in CU at offset 0x%lx [in module %s]"),
16973 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16974 info_ptr
= (str_offsets_section
->buffer
16975 + str_index
* cu
->header
.offset_size
);
16976 if (cu
->header
.offset_size
== 4)
16977 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16979 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16980 if (str_offset
>= str_section
->size
)
16981 error (_("Offset from %s pointing outside of"
16982 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16983 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16984 return (const char *) (str_section
->buffer
+ str_offset
);
16987 /* Return the length of an LEB128 number in BUF. */
16990 leb128_size (const gdb_byte
*buf
)
16992 const gdb_byte
*begin
= buf
;
16998 if ((byte
& 128) == 0)
16999 return buf
- begin
;
17004 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17013 cu
->language
= language_c
;
17015 case DW_LANG_C_plus_plus
:
17016 case DW_LANG_C_plus_plus_11
:
17017 case DW_LANG_C_plus_plus_14
:
17018 cu
->language
= language_cplus
;
17021 cu
->language
= language_d
;
17023 case DW_LANG_Fortran77
:
17024 case DW_LANG_Fortran90
:
17025 case DW_LANG_Fortran95
:
17026 case DW_LANG_Fortran03
:
17027 case DW_LANG_Fortran08
:
17028 cu
->language
= language_fortran
;
17031 cu
->language
= language_go
;
17033 case DW_LANG_Mips_Assembler
:
17034 cu
->language
= language_asm
;
17037 cu
->language
= language_java
;
17039 case DW_LANG_Ada83
:
17040 case DW_LANG_Ada95
:
17041 cu
->language
= language_ada
;
17043 case DW_LANG_Modula2
:
17044 cu
->language
= language_m2
;
17046 case DW_LANG_Pascal83
:
17047 cu
->language
= language_pascal
;
17050 cu
->language
= language_objc
;
17052 case DW_LANG_Cobol74
:
17053 case DW_LANG_Cobol85
:
17055 cu
->language
= language_minimal
;
17058 cu
->language_defn
= language_def (cu
->language
);
17061 /* Return the named attribute or NULL if not there. */
17063 static struct attribute
*
17064 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17069 struct attribute
*spec
= NULL
;
17071 for (i
= 0; i
< die
->num_attrs
; ++i
)
17073 if (die
->attrs
[i
].name
== name
)
17074 return &die
->attrs
[i
];
17075 if (die
->attrs
[i
].name
== DW_AT_specification
17076 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17077 spec
= &die
->attrs
[i
];
17083 die
= follow_die_ref (die
, spec
, &cu
);
17089 /* Return the named attribute or NULL if not there,
17090 but do not follow DW_AT_specification, etc.
17091 This is for use in contexts where we're reading .debug_types dies.
17092 Following DW_AT_specification, DW_AT_abstract_origin will take us
17093 back up the chain, and we want to go down. */
17095 static struct attribute
*
17096 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17100 for (i
= 0; i
< die
->num_attrs
; ++i
)
17101 if (die
->attrs
[i
].name
== name
)
17102 return &die
->attrs
[i
];
17107 /* Return the string associated with a string-typed attribute, or NULL if it
17108 is either not found or is of an incorrect type. */
17110 static const char *
17111 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17113 struct attribute
*attr
;
17114 const char *str
= NULL
;
17116 attr
= dwarf2_attr (die
, name
, cu
);
17120 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17121 || attr
->form
== DW_FORM_GNU_strp_alt
)
17122 str
= DW_STRING (attr
);
17124 complaint (&symfile_complaints
,
17125 _("string type expected for attribute %s for "
17126 "DIE at 0x%x in module %s"),
17127 dwarf_attr_name (name
), die
->offset
.sect_off
,
17128 objfile_name (cu
->objfile
));
17134 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17135 and holds a non-zero value. This function should only be used for
17136 DW_FORM_flag or DW_FORM_flag_present attributes. */
17139 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17141 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17143 return (attr
&& DW_UNSND (attr
));
17147 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17149 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17150 which value is non-zero. However, we have to be careful with
17151 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17152 (via dwarf2_flag_true_p) follows this attribute. So we may
17153 end up accidently finding a declaration attribute that belongs
17154 to a different DIE referenced by the specification attribute,
17155 even though the given DIE does not have a declaration attribute. */
17156 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17157 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17160 /* Return the die giving the specification for DIE, if there is
17161 one. *SPEC_CU is the CU containing DIE on input, and the CU
17162 containing the return value on output. If there is no
17163 specification, but there is an abstract origin, that is
17166 static struct die_info
*
17167 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17169 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17172 if (spec_attr
== NULL
)
17173 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17175 if (spec_attr
== NULL
)
17178 return follow_die_ref (die
, spec_attr
, spec_cu
);
17181 /* Free the line_header structure *LH, and any arrays and strings it
17183 NOTE: This is also used as a "cleanup" function. */
17186 free_line_header (struct line_header
*lh
)
17188 if (lh
->standard_opcode_lengths
)
17189 xfree (lh
->standard_opcode_lengths
);
17191 /* Remember that all the lh->file_names[i].name pointers are
17192 pointers into debug_line_buffer, and don't need to be freed. */
17193 if (lh
->file_names
)
17194 xfree (lh
->file_names
);
17196 /* Similarly for the include directory names. */
17197 if (lh
->include_dirs
)
17198 xfree (lh
->include_dirs
);
17203 /* Stub for free_line_header to match void * callback types. */
17206 free_line_header_voidp (void *arg
)
17208 struct line_header
*lh
= (struct line_header
*) arg
;
17210 free_line_header (lh
);
17213 /* Add an entry to LH's include directory table. */
17216 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17218 if (dwarf_line_debug
>= 2)
17219 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17220 lh
->num_include_dirs
+ 1, include_dir
);
17222 /* Grow the array if necessary. */
17223 if (lh
->include_dirs_size
== 0)
17225 lh
->include_dirs_size
= 1; /* for testing */
17226 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17228 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17230 lh
->include_dirs_size
*= 2;
17231 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17232 lh
->include_dirs_size
);
17235 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17238 /* Add an entry to LH's file name table. */
17241 add_file_name (struct line_header
*lh
,
17243 unsigned int dir_index
,
17244 unsigned int mod_time
,
17245 unsigned int length
)
17247 struct file_entry
*fe
;
17249 if (dwarf_line_debug
>= 2)
17250 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17251 lh
->num_file_names
+ 1, name
);
17253 /* Grow the array if necessary. */
17254 if (lh
->file_names_size
== 0)
17256 lh
->file_names_size
= 1; /* for testing */
17257 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17259 else if (lh
->num_file_names
>= lh
->file_names_size
)
17261 lh
->file_names_size
*= 2;
17263 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17266 fe
= &lh
->file_names
[lh
->num_file_names
++];
17268 fe
->dir_index
= dir_index
;
17269 fe
->mod_time
= mod_time
;
17270 fe
->length
= length
;
17271 fe
->included_p
= 0;
17275 /* A convenience function to find the proper .debug_line section for a CU. */
17277 static struct dwarf2_section_info
*
17278 get_debug_line_section (struct dwarf2_cu
*cu
)
17280 struct dwarf2_section_info
*section
;
17282 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17284 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17285 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17286 else if (cu
->per_cu
->is_dwz
)
17288 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17290 section
= &dwz
->line
;
17293 section
= &dwarf2_per_objfile
->line
;
17298 /* Read the statement program header starting at OFFSET in
17299 .debug_line, or .debug_line.dwo. Return a pointer
17300 to a struct line_header, allocated using xmalloc.
17301 Returns NULL if there is a problem reading the header, e.g., if it
17302 has a version we don't understand.
17304 NOTE: the strings in the include directory and file name tables of
17305 the returned object point into the dwarf line section buffer,
17306 and must not be freed. */
17308 static struct line_header
*
17309 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17311 struct cleanup
*back_to
;
17312 struct line_header
*lh
;
17313 const gdb_byte
*line_ptr
;
17314 unsigned int bytes_read
, offset_size
;
17316 const char *cur_dir
, *cur_file
;
17317 struct dwarf2_section_info
*section
;
17320 section
= get_debug_line_section (cu
);
17321 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17322 if (section
->buffer
== NULL
)
17324 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17325 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17327 complaint (&symfile_complaints
, _("missing .debug_line section"));
17331 /* We can't do this until we know the section is non-empty.
17332 Only then do we know we have such a section. */
17333 abfd
= get_section_bfd_owner (section
);
17335 /* Make sure that at least there's room for the total_length field.
17336 That could be 12 bytes long, but we're just going to fudge that. */
17337 if (offset
+ 4 >= section
->size
)
17339 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17343 lh
= XNEW (struct line_header
);
17344 memset (lh
, 0, sizeof (*lh
));
17345 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17348 lh
->offset
.sect_off
= offset
;
17349 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17351 line_ptr
= section
->buffer
+ offset
;
17353 /* Read in the header. */
17355 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17356 &bytes_read
, &offset_size
);
17357 line_ptr
+= bytes_read
;
17358 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17360 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17361 do_cleanups (back_to
);
17364 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17365 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17367 if (lh
->version
> 4)
17369 /* This is a version we don't understand. The format could have
17370 changed in ways we don't handle properly so just punt. */
17371 complaint (&symfile_complaints
,
17372 _("unsupported version in .debug_line section"));
17375 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17376 line_ptr
+= offset_size
;
17377 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17379 if (lh
->version
>= 4)
17381 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17385 lh
->maximum_ops_per_instruction
= 1;
17387 if (lh
->maximum_ops_per_instruction
== 0)
17389 lh
->maximum_ops_per_instruction
= 1;
17390 complaint (&symfile_complaints
,
17391 _("invalid maximum_ops_per_instruction "
17392 "in `.debug_line' section"));
17395 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17397 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17399 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17401 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17403 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17405 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17406 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17408 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17412 /* Read directory table. */
17413 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17415 line_ptr
+= bytes_read
;
17416 add_include_dir (lh
, cur_dir
);
17418 line_ptr
+= bytes_read
;
17420 /* Read file name table. */
17421 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17423 unsigned int dir_index
, mod_time
, length
;
17425 line_ptr
+= bytes_read
;
17426 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17427 line_ptr
+= bytes_read
;
17428 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17429 line_ptr
+= bytes_read
;
17430 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17431 line_ptr
+= bytes_read
;
17433 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17435 line_ptr
+= bytes_read
;
17436 lh
->statement_program_start
= line_ptr
;
17438 if (line_ptr
> (section
->buffer
+ section
->size
))
17439 complaint (&symfile_complaints
,
17440 _("line number info header doesn't "
17441 "fit in `.debug_line' section"));
17443 discard_cleanups (back_to
);
17447 /* Subroutine of dwarf_decode_lines to simplify it.
17448 Return the file name of the psymtab for included file FILE_INDEX
17449 in line header LH of PST.
17450 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17451 If space for the result is malloc'd, it will be freed by a cleanup.
17452 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17454 The function creates dangling cleanup registration. */
17456 static const char *
17457 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17458 const struct partial_symtab
*pst
,
17459 const char *comp_dir
)
17461 const struct file_entry fe
= lh
->file_names
[file_index
];
17462 const char *include_name
= fe
.name
;
17463 const char *include_name_to_compare
= include_name
;
17464 const char *dir_name
= NULL
;
17465 const char *pst_filename
;
17466 char *copied_name
= NULL
;
17469 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17470 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17472 if (!IS_ABSOLUTE_PATH (include_name
)
17473 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17475 /* Avoid creating a duplicate psymtab for PST.
17476 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17477 Before we do the comparison, however, we need to account
17478 for DIR_NAME and COMP_DIR.
17479 First prepend dir_name (if non-NULL). If we still don't
17480 have an absolute path prepend comp_dir (if non-NULL).
17481 However, the directory we record in the include-file's
17482 psymtab does not contain COMP_DIR (to match the
17483 corresponding symtab(s)).
17488 bash$ gcc -g ./hello.c
17489 include_name = "hello.c"
17491 DW_AT_comp_dir = comp_dir = "/tmp"
17492 DW_AT_name = "./hello.c"
17496 if (dir_name
!= NULL
)
17498 char *tem
= concat (dir_name
, SLASH_STRING
,
17499 include_name
, (char *)NULL
);
17501 make_cleanup (xfree
, tem
);
17502 include_name
= tem
;
17503 include_name_to_compare
= include_name
;
17505 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17507 char *tem
= concat (comp_dir
, SLASH_STRING
,
17508 include_name
, (char *)NULL
);
17510 make_cleanup (xfree
, tem
);
17511 include_name_to_compare
= tem
;
17515 pst_filename
= pst
->filename
;
17516 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17518 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17519 pst_filename
, (char *)NULL
);
17520 pst_filename
= copied_name
;
17523 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17525 if (copied_name
!= NULL
)
17526 xfree (copied_name
);
17530 return include_name
;
17533 /* State machine to track the state of the line number program. */
17537 /* These are part of the standard DWARF line number state machine. */
17539 unsigned char op_index
;
17544 unsigned int discriminator
;
17546 /* Additional bits of state we need to track. */
17548 /* The last file that we called dwarf2_start_subfile for.
17549 This is only used for TLLs. */
17550 unsigned int last_file
;
17551 /* The last file a line number was recorded for. */
17552 struct subfile
*last_subfile
;
17554 /* The function to call to record a line. */
17555 record_line_ftype
*record_line
;
17557 /* The last line number that was recorded, used to coalesce
17558 consecutive entries for the same line. This can happen, for
17559 example, when discriminators are present. PR 17276. */
17560 unsigned int last_line
;
17561 int line_has_non_zero_discriminator
;
17562 } lnp_state_machine
;
17564 /* There's a lot of static state to pass to dwarf_record_line.
17565 This keeps it all together. */
17570 struct gdbarch
*gdbarch
;
17572 /* The line number header. */
17573 struct line_header
*line_header
;
17575 /* Non-zero if we're recording lines.
17576 Otherwise we're building partial symtabs and are just interested in
17577 finding include files mentioned by the line number program. */
17578 int record_lines_p
;
17579 } lnp_reader_state
;
17581 /* Ignore this record_line request. */
17584 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17589 /* Return non-zero if we should add LINE to the line number table.
17590 LINE is the line to add, LAST_LINE is the last line that was added,
17591 LAST_SUBFILE is the subfile for LAST_LINE.
17592 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17593 had a non-zero discriminator.
17595 We have to be careful in the presence of discriminators.
17596 E.g., for this line:
17598 for (i = 0; i < 100000; i++);
17600 clang can emit four line number entries for that one line,
17601 each with a different discriminator.
17602 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17604 However, we want gdb to coalesce all four entries into one.
17605 Otherwise the user could stepi into the middle of the line and
17606 gdb would get confused about whether the pc really was in the
17607 middle of the line.
17609 Things are further complicated by the fact that two consecutive
17610 line number entries for the same line is a heuristic used by gcc
17611 to denote the end of the prologue. So we can't just discard duplicate
17612 entries, we have to be selective about it. The heuristic we use is
17613 that we only collapse consecutive entries for the same line if at least
17614 one of those entries has a non-zero discriminator. PR 17276.
17616 Note: Addresses in the line number state machine can never go backwards
17617 within one sequence, thus this coalescing is ok. */
17620 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17621 int line_has_non_zero_discriminator
,
17622 struct subfile
*last_subfile
)
17624 if (current_subfile
!= last_subfile
)
17626 if (line
!= last_line
)
17628 /* Same line for the same file that we've seen already.
17629 As a last check, for pr 17276, only record the line if the line
17630 has never had a non-zero discriminator. */
17631 if (!line_has_non_zero_discriminator
)
17636 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17637 in the line table of subfile SUBFILE. */
17640 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17641 unsigned int line
, CORE_ADDR address
,
17642 record_line_ftype p_record_line
)
17644 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17646 if (dwarf_line_debug
)
17648 fprintf_unfiltered (gdb_stdlog
,
17649 "Recording line %u, file %s, address %s\n",
17650 line
, lbasename (subfile
->name
),
17651 paddress (gdbarch
, address
));
17654 (*p_record_line
) (subfile
, line
, addr
);
17657 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17658 Mark the end of a set of line number records.
17659 The arguments are the same as for dwarf_record_line_1.
17660 If SUBFILE is NULL the request is ignored. */
17663 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17664 CORE_ADDR address
, record_line_ftype p_record_line
)
17666 if (subfile
== NULL
)
17669 if (dwarf_line_debug
)
17671 fprintf_unfiltered (gdb_stdlog
,
17672 "Finishing current line, file %s, address %s\n",
17673 lbasename (subfile
->name
),
17674 paddress (gdbarch
, address
));
17677 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17680 /* Record the line in STATE.
17681 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17684 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17687 const struct line_header
*lh
= reader
->line_header
;
17688 unsigned int file
, line
, discriminator
;
17691 file
= state
->file
;
17692 line
= state
->line
;
17693 is_stmt
= state
->is_stmt
;
17694 discriminator
= state
->discriminator
;
17696 if (dwarf_line_debug
)
17698 fprintf_unfiltered (gdb_stdlog
,
17699 "Processing actual line %u: file %u,"
17700 " address %s, is_stmt %u, discrim %u\n",
17702 paddress (reader
->gdbarch
, state
->address
),
17703 is_stmt
, discriminator
);
17706 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17707 dwarf2_debug_line_missing_file_complaint ();
17708 /* For now we ignore lines not starting on an instruction boundary.
17709 But not when processing end_sequence for compatibility with the
17710 previous version of the code. */
17711 else if (state
->op_index
== 0 || end_sequence
)
17713 lh
->file_names
[file
- 1].included_p
= 1;
17714 if (reader
->record_lines_p
&& is_stmt
)
17716 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17718 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17719 state
->address
, state
->record_line
);
17724 if (dwarf_record_line_p (line
, state
->last_line
,
17725 state
->line_has_non_zero_discriminator
,
17726 state
->last_subfile
))
17728 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17729 line
, state
->address
,
17730 state
->record_line
);
17732 state
->last_subfile
= current_subfile
;
17733 state
->last_line
= line
;
17739 /* Initialize STATE for the start of a line number program. */
17742 init_lnp_state_machine (lnp_state_machine
*state
,
17743 const lnp_reader_state
*reader
)
17745 memset (state
, 0, sizeof (*state
));
17747 /* Just starting, there is no "last file". */
17748 state
->last_file
= 0;
17749 state
->last_subfile
= NULL
;
17751 state
->record_line
= record_line
;
17753 state
->last_line
= 0;
17754 state
->line_has_non_zero_discriminator
= 0;
17756 /* Initialize these according to the DWARF spec. */
17757 state
->op_index
= 0;
17760 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17761 was a line entry for it so that the backend has a chance to adjust it
17762 and also record it in case it needs it. This is currently used by MIPS
17763 code, cf. `mips_adjust_dwarf2_line'. */
17764 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17765 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17766 state
->discriminator
= 0;
17769 /* Check address and if invalid nop-out the rest of the lines in this
17773 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17774 const gdb_byte
*line_ptr
,
17775 CORE_ADDR lowpc
, CORE_ADDR address
)
17777 /* If address < lowpc then it's not a usable value, it's outside the
17778 pc range of the CU. However, we restrict the test to only address
17779 values of zero to preserve GDB's previous behaviour which is to
17780 handle the specific case of a function being GC'd by the linker. */
17782 if (address
== 0 && address
< lowpc
)
17784 /* This line table is for a function which has been
17785 GCd by the linker. Ignore it. PR gdb/12528 */
17787 struct objfile
*objfile
= cu
->objfile
;
17788 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17790 complaint (&symfile_complaints
,
17791 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17792 line_offset
, objfile_name (objfile
));
17793 state
->record_line
= noop_record_line
;
17794 /* Note: sm.record_line is left as noop_record_line
17795 until we see DW_LNE_end_sequence. */
17799 /* Subroutine of dwarf_decode_lines to simplify it.
17800 Process the line number information in LH.
17801 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17802 program in order to set included_p for every referenced header. */
17805 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17806 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17808 const gdb_byte
*line_ptr
, *extended_end
;
17809 const gdb_byte
*line_end
;
17810 unsigned int bytes_read
, extended_len
;
17811 unsigned char op_code
, extended_op
;
17812 CORE_ADDR baseaddr
;
17813 struct objfile
*objfile
= cu
->objfile
;
17814 bfd
*abfd
= objfile
->obfd
;
17815 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17816 /* Non-zero if we're recording line info (as opposed to building partial
17818 int record_lines_p
= !decode_for_pst_p
;
17819 /* A collection of things we need to pass to dwarf_record_line. */
17820 lnp_reader_state reader_state
;
17822 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17824 line_ptr
= lh
->statement_program_start
;
17825 line_end
= lh
->statement_program_end
;
17827 reader_state
.gdbarch
= gdbarch
;
17828 reader_state
.line_header
= lh
;
17829 reader_state
.record_lines_p
= record_lines_p
;
17831 /* Read the statement sequences until there's nothing left. */
17832 while (line_ptr
< line_end
)
17834 /* The DWARF line number program state machine. */
17835 lnp_state_machine state_machine
;
17836 int end_sequence
= 0;
17838 /* Reset the state machine at the start of each sequence. */
17839 init_lnp_state_machine (&state_machine
, &reader_state
);
17841 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17843 /* Start a subfile for the current file of the state machine. */
17844 /* lh->include_dirs and lh->file_names are 0-based, but the
17845 directory and file name numbers in the statement program
17847 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17848 const char *dir
= NULL
;
17850 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17851 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17853 dwarf2_start_subfile (fe
->name
, dir
);
17856 /* Decode the table. */
17857 while (line_ptr
< line_end
&& !end_sequence
)
17859 op_code
= read_1_byte (abfd
, line_ptr
);
17862 if (op_code
>= lh
->opcode_base
)
17864 /* Special opcode. */
17865 unsigned char adj_opcode
;
17866 CORE_ADDR addr_adj
;
17869 adj_opcode
= op_code
- lh
->opcode_base
;
17870 addr_adj
= (((state_machine
.op_index
17871 + (adj_opcode
/ lh
->line_range
))
17872 / lh
->maximum_ops_per_instruction
)
17873 * lh
->minimum_instruction_length
);
17874 state_machine
.address
17875 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17876 state_machine
.op_index
= ((state_machine
.op_index
17877 + (adj_opcode
/ lh
->line_range
))
17878 % lh
->maximum_ops_per_instruction
);
17879 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17880 state_machine
.line
+= line_delta
;
17881 if (line_delta
!= 0)
17882 state_machine
.line_has_non_zero_discriminator
17883 = state_machine
.discriminator
!= 0;
17885 dwarf_record_line (&reader_state
, &state_machine
, 0);
17886 state_machine
.discriminator
= 0;
17888 else switch (op_code
)
17890 case DW_LNS_extended_op
:
17891 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17893 line_ptr
+= bytes_read
;
17894 extended_end
= line_ptr
+ extended_len
;
17895 extended_op
= read_1_byte (abfd
, line_ptr
);
17897 switch (extended_op
)
17899 case DW_LNE_end_sequence
:
17900 state_machine
.record_line
= record_line
;
17903 case DW_LNE_set_address
:
17906 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17908 line_ptr
+= bytes_read
;
17909 check_line_address (cu
, &state_machine
, line_ptr
,
17911 state_machine
.op_index
= 0;
17912 address
+= baseaddr
;
17913 state_machine
.address
17914 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17917 case DW_LNE_define_file
:
17919 const char *cur_file
;
17920 unsigned int dir_index
, mod_time
, length
;
17922 cur_file
= read_direct_string (abfd
, line_ptr
,
17924 line_ptr
+= bytes_read
;
17926 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17927 line_ptr
+= bytes_read
;
17929 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17930 line_ptr
+= bytes_read
;
17932 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17933 line_ptr
+= bytes_read
;
17934 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17937 case DW_LNE_set_discriminator
:
17938 /* The discriminator is not interesting to the debugger;
17939 just ignore it. We still need to check its value though:
17940 if there are consecutive entries for the same
17941 (non-prologue) line we want to coalesce them.
17943 state_machine
.discriminator
17944 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17945 state_machine
.line_has_non_zero_discriminator
17946 |= state_machine
.discriminator
!= 0;
17947 line_ptr
+= bytes_read
;
17950 complaint (&symfile_complaints
,
17951 _("mangled .debug_line section"));
17954 /* Make sure that we parsed the extended op correctly. If e.g.
17955 we expected a different address size than the producer used,
17956 we may have read the wrong number of bytes. */
17957 if (line_ptr
!= extended_end
)
17959 complaint (&symfile_complaints
,
17960 _("mangled .debug_line section"));
17965 dwarf_record_line (&reader_state
, &state_machine
, 0);
17966 state_machine
.discriminator
= 0;
17968 case DW_LNS_advance_pc
:
17971 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17972 CORE_ADDR addr_adj
;
17974 addr_adj
= (((state_machine
.op_index
+ adjust
)
17975 / lh
->maximum_ops_per_instruction
)
17976 * lh
->minimum_instruction_length
);
17977 state_machine
.address
17978 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17979 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17980 % lh
->maximum_ops_per_instruction
);
17981 line_ptr
+= bytes_read
;
17984 case DW_LNS_advance_line
:
17987 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17989 state_machine
.line
+= line_delta
;
17990 if (line_delta
!= 0)
17991 state_machine
.line_has_non_zero_discriminator
17992 = state_machine
.discriminator
!= 0;
17993 line_ptr
+= bytes_read
;
17996 case DW_LNS_set_file
:
17998 /* The arrays lh->include_dirs and lh->file_names are
17999 0-based, but the directory and file name numbers in
18000 the statement program are 1-based. */
18001 struct file_entry
*fe
;
18002 const char *dir
= NULL
;
18004 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18006 line_ptr
+= bytes_read
;
18007 if (state_machine
.file
== 0
18008 || state_machine
.file
- 1 >= lh
->num_file_names
)
18009 dwarf2_debug_line_missing_file_complaint ();
18012 fe
= &lh
->file_names
[state_machine
.file
- 1];
18013 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18014 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18015 if (record_lines_p
)
18017 state_machine
.last_subfile
= current_subfile
;
18018 state_machine
.line_has_non_zero_discriminator
18019 = state_machine
.discriminator
!= 0;
18020 dwarf2_start_subfile (fe
->name
, dir
);
18025 case DW_LNS_set_column
:
18026 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18027 line_ptr
+= bytes_read
;
18029 case DW_LNS_negate_stmt
:
18030 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18032 case DW_LNS_set_basic_block
:
18034 /* Add to the address register of the state machine the
18035 address increment value corresponding to special opcode
18036 255. I.e., this value is scaled by the minimum
18037 instruction length since special opcode 255 would have
18038 scaled the increment. */
18039 case DW_LNS_const_add_pc
:
18041 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18042 CORE_ADDR addr_adj
;
18044 addr_adj
= (((state_machine
.op_index
+ adjust
)
18045 / lh
->maximum_ops_per_instruction
)
18046 * lh
->minimum_instruction_length
);
18047 state_machine
.address
18048 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18049 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18050 % lh
->maximum_ops_per_instruction
);
18053 case DW_LNS_fixed_advance_pc
:
18055 CORE_ADDR addr_adj
;
18057 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18058 state_machine
.address
18059 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18060 state_machine
.op_index
= 0;
18066 /* Unknown standard opcode, ignore it. */
18069 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18071 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18072 line_ptr
+= bytes_read
;
18079 dwarf2_debug_line_missing_end_sequence_complaint ();
18081 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18082 in which case we still finish recording the last line). */
18083 dwarf_record_line (&reader_state
, &state_machine
, 1);
18087 /* Decode the Line Number Program (LNP) for the given line_header
18088 structure and CU. The actual information extracted and the type
18089 of structures created from the LNP depends on the value of PST.
18091 1. If PST is NULL, then this procedure uses the data from the program
18092 to create all necessary symbol tables, and their linetables.
18094 2. If PST is not NULL, this procedure reads the program to determine
18095 the list of files included by the unit represented by PST, and
18096 builds all the associated partial symbol tables.
18098 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18099 It is used for relative paths in the line table.
18100 NOTE: When processing partial symtabs (pst != NULL),
18101 comp_dir == pst->dirname.
18103 NOTE: It is important that psymtabs have the same file name (via strcmp)
18104 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18105 symtab we don't use it in the name of the psymtabs we create.
18106 E.g. expand_line_sal requires this when finding psymtabs to expand.
18107 A good testcase for this is mb-inline.exp.
18109 LOWPC is the lowest address in CU (or 0 if not known).
18111 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18112 for its PC<->lines mapping information. Otherwise only the filename
18113 table is read in. */
18116 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18117 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18118 CORE_ADDR lowpc
, int decode_mapping
)
18120 struct objfile
*objfile
= cu
->objfile
;
18121 const int decode_for_pst_p
= (pst
!= NULL
);
18123 if (decode_mapping
)
18124 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18126 if (decode_for_pst_p
)
18130 /* Now that we're done scanning the Line Header Program, we can
18131 create the psymtab of each included file. */
18132 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18133 if (lh
->file_names
[file_index
].included_p
== 1)
18135 const char *include_name
=
18136 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18137 if (include_name
!= NULL
)
18138 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18143 /* Make sure a symtab is created for every file, even files
18144 which contain only variables (i.e. no code with associated
18146 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18149 for (i
= 0; i
< lh
->num_file_names
; i
++)
18151 const char *dir
= NULL
;
18152 struct file_entry
*fe
;
18154 fe
= &lh
->file_names
[i
];
18155 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18156 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18157 dwarf2_start_subfile (fe
->name
, dir
);
18159 if (current_subfile
->symtab
== NULL
)
18161 current_subfile
->symtab
18162 = allocate_symtab (cust
, current_subfile
->name
);
18164 fe
->symtab
= current_subfile
->symtab
;
18169 /* Start a subfile for DWARF. FILENAME is the name of the file and
18170 DIRNAME the name of the source directory which contains FILENAME
18171 or NULL if not known.
18172 This routine tries to keep line numbers from identical absolute and
18173 relative file names in a common subfile.
18175 Using the `list' example from the GDB testsuite, which resides in
18176 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18177 of /srcdir/list0.c yields the following debugging information for list0.c:
18179 DW_AT_name: /srcdir/list0.c
18180 DW_AT_comp_dir: /compdir
18181 files.files[0].name: list0.h
18182 files.files[0].dir: /srcdir
18183 files.files[1].name: list0.c
18184 files.files[1].dir: /srcdir
18186 The line number information for list0.c has to end up in a single
18187 subfile, so that `break /srcdir/list0.c:1' works as expected.
18188 start_subfile will ensure that this happens provided that we pass the
18189 concatenation of files.files[1].dir and files.files[1].name as the
18193 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18197 /* In order not to lose the line information directory,
18198 we concatenate it to the filename when it makes sense.
18199 Note that the Dwarf3 standard says (speaking of filenames in line
18200 information): ``The directory index is ignored for file names
18201 that represent full path names''. Thus ignoring dirname in the
18202 `else' branch below isn't an issue. */
18204 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18206 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18210 start_subfile (filename
);
18216 /* Start a symtab for DWARF.
18217 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18219 static struct compunit_symtab
*
18220 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18221 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18223 struct compunit_symtab
*cust
18224 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18226 record_debugformat ("DWARF 2");
18227 record_producer (cu
->producer
);
18229 /* We assume that we're processing GCC output. */
18230 processing_gcc_compilation
= 2;
18232 cu
->processing_has_namespace_info
= 0;
18238 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18239 struct dwarf2_cu
*cu
)
18241 struct objfile
*objfile
= cu
->objfile
;
18242 struct comp_unit_head
*cu_header
= &cu
->header
;
18244 /* NOTE drow/2003-01-30: There used to be a comment and some special
18245 code here to turn a symbol with DW_AT_external and a
18246 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18247 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18248 with some versions of binutils) where shared libraries could have
18249 relocations against symbols in their debug information - the
18250 minimal symbol would have the right address, but the debug info
18251 would not. It's no longer necessary, because we will explicitly
18252 apply relocations when we read in the debug information now. */
18254 /* A DW_AT_location attribute with no contents indicates that a
18255 variable has been optimized away. */
18256 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18258 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18262 /* Handle one degenerate form of location expression specially, to
18263 preserve GDB's previous behavior when section offsets are
18264 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18265 then mark this symbol as LOC_STATIC. */
18267 if (attr_form_is_block (attr
)
18268 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18269 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18270 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18271 && (DW_BLOCK (attr
)->size
18272 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18274 unsigned int dummy
;
18276 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18277 SYMBOL_VALUE_ADDRESS (sym
) =
18278 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18280 SYMBOL_VALUE_ADDRESS (sym
) =
18281 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18282 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18283 fixup_symbol_section (sym
, objfile
);
18284 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18285 SYMBOL_SECTION (sym
));
18289 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18290 expression evaluator, and use LOC_COMPUTED only when necessary
18291 (i.e. when the value of a register or memory location is
18292 referenced, or a thread-local block, etc.). Then again, it might
18293 not be worthwhile. I'm assuming that it isn't unless performance
18294 or memory numbers show me otherwise. */
18296 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18298 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18299 cu
->has_loclist
= 1;
18302 /* Given a pointer to a DWARF information entry, figure out if we need
18303 to make a symbol table entry for it, and if so, create a new entry
18304 and return a pointer to it.
18305 If TYPE is NULL, determine symbol type from the die, otherwise
18306 used the passed type.
18307 If SPACE is not NULL, use it to hold the new symbol. If it is
18308 NULL, allocate a new symbol on the objfile's obstack. */
18310 static struct symbol
*
18311 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18312 struct symbol
*space
)
18314 struct objfile
*objfile
= cu
->objfile
;
18315 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18316 struct symbol
*sym
= NULL
;
18318 struct attribute
*attr
= NULL
;
18319 struct attribute
*attr2
= NULL
;
18320 CORE_ADDR baseaddr
;
18321 struct pending
**list_to_add
= NULL
;
18323 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18325 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18327 name
= dwarf2_name (die
, cu
);
18330 const char *linkagename
;
18331 int suppress_add
= 0;
18336 sym
= allocate_symbol (objfile
);
18337 OBJSTAT (objfile
, n_syms
++);
18339 /* Cache this symbol's name and the name's demangled form (if any). */
18340 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18341 linkagename
= dwarf2_physname (name
, die
, cu
);
18342 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18344 /* Fortran does not have mangling standard and the mangling does differ
18345 between gfortran, iFort etc. */
18346 if (cu
->language
== language_fortran
18347 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18348 symbol_set_demangled_name (&(sym
->ginfo
),
18349 dwarf2_full_name (name
, die
, cu
),
18352 /* Default assumptions.
18353 Use the passed type or decode it from the die. */
18354 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18355 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18357 SYMBOL_TYPE (sym
) = type
;
18359 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18360 attr
= dwarf2_attr (die
,
18361 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18365 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18368 attr
= dwarf2_attr (die
,
18369 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18373 int file_index
= DW_UNSND (attr
);
18375 if (cu
->line_header
== NULL
18376 || file_index
> cu
->line_header
->num_file_names
)
18377 complaint (&symfile_complaints
,
18378 _("file index out of range"));
18379 else if (file_index
> 0)
18381 struct file_entry
*fe
;
18383 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18384 symbol_set_symtab (sym
, fe
->symtab
);
18391 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18396 addr
= attr_value_as_address (attr
);
18397 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18398 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18400 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18401 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18402 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18403 add_symbol_to_list (sym
, cu
->list_in_scope
);
18405 case DW_TAG_subprogram
:
18406 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18408 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18409 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18410 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18411 || cu
->language
== language_ada
)
18413 /* Subprograms marked external are stored as a global symbol.
18414 Ada subprograms, whether marked external or not, are always
18415 stored as a global symbol, because we want to be able to
18416 access them globally. For instance, we want to be able
18417 to break on a nested subprogram without having to
18418 specify the context. */
18419 list_to_add
= &global_symbols
;
18423 list_to_add
= cu
->list_in_scope
;
18426 case DW_TAG_inlined_subroutine
:
18427 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18429 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18430 SYMBOL_INLINED (sym
) = 1;
18431 list_to_add
= cu
->list_in_scope
;
18433 case DW_TAG_template_value_param
:
18435 /* Fall through. */
18436 case DW_TAG_constant
:
18437 case DW_TAG_variable
:
18438 case DW_TAG_member
:
18439 /* Compilation with minimal debug info may result in
18440 variables with missing type entries. Change the
18441 misleading `void' type to something sensible. */
18442 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18444 = objfile_type (objfile
)->nodebug_data_symbol
;
18446 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18447 /* In the case of DW_TAG_member, we should only be called for
18448 static const members. */
18449 if (die
->tag
== DW_TAG_member
)
18451 /* dwarf2_add_field uses die_is_declaration,
18452 so we do the same. */
18453 gdb_assert (die_is_declaration (die
, cu
));
18458 dwarf2_const_value (attr
, sym
, cu
);
18459 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18462 if (attr2
&& (DW_UNSND (attr2
) != 0))
18463 list_to_add
= &global_symbols
;
18465 list_to_add
= cu
->list_in_scope
;
18469 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18472 var_decode_location (attr
, sym
, cu
);
18473 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18475 /* Fortran explicitly imports any global symbols to the local
18476 scope by DW_TAG_common_block. */
18477 if (cu
->language
== language_fortran
&& die
->parent
18478 && die
->parent
->tag
== DW_TAG_common_block
)
18481 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18482 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18483 && !dwarf2_per_objfile
->has_section_at_zero
)
18485 /* When a static variable is eliminated by the linker,
18486 the corresponding debug information is not stripped
18487 out, but the variable address is set to null;
18488 do not add such variables into symbol table. */
18490 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18492 /* Workaround gfortran PR debug/40040 - it uses
18493 DW_AT_location for variables in -fPIC libraries which may
18494 get overriden by other libraries/executable and get
18495 a different address. Resolve it by the minimal symbol
18496 which may come from inferior's executable using copy
18497 relocation. Make this workaround only for gfortran as for
18498 other compilers GDB cannot guess the minimal symbol
18499 Fortran mangling kind. */
18500 if (cu
->language
== language_fortran
&& die
->parent
18501 && die
->parent
->tag
== DW_TAG_module
18503 && startswith (cu
->producer
, "GNU Fortran "))
18504 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18506 /* A variable with DW_AT_external is never static,
18507 but it may be block-scoped. */
18508 list_to_add
= (cu
->list_in_scope
== &file_symbols
18509 ? &global_symbols
: cu
->list_in_scope
);
18512 list_to_add
= cu
->list_in_scope
;
18516 /* We do not know the address of this symbol.
18517 If it is an external symbol and we have type information
18518 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18519 The address of the variable will then be determined from
18520 the minimal symbol table whenever the variable is
18522 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18524 /* Fortran explicitly imports any global symbols to the local
18525 scope by DW_TAG_common_block. */
18526 if (cu
->language
== language_fortran
&& die
->parent
18527 && die
->parent
->tag
== DW_TAG_common_block
)
18529 /* SYMBOL_CLASS doesn't matter here because
18530 read_common_block is going to reset it. */
18532 list_to_add
= cu
->list_in_scope
;
18534 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18535 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18537 /* A variable with DW_AT_external is never static, but it
18538 may be block-scoped. */
18539 list_to_add
= (cu
->list_in_scope
== &file_symbols
18540 ? &global_symbols
: cu
->list_in_scope
);
18542 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18544 else if (!die_is_declaration (die
, cu
))
18546 /* Use the default LOC_OPTIMIZED_OUT class. */
18547 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18549 list_to_add
= cu
->list_in_scope
;
18553 case DW_TAG_formal_parameter
:
18554 /* If we are inside a function, mark this as an argument. If
18555 not, we might be looking at an argument to an inlined function
18556 when we do not have enough information to show inlined frames;
18557 pretend it's a local variable in that case so that the user can
18559 if (context_stack_depth
> 0
18560 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18561 SYMBOL_IS_ARGUMENT (sym
) = 1;
18562 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18565 var_decode_location (attr
, sym
, cu
);
18567 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18570 dwarf2_const_value (attr
, sym
, cu
);
18573 list_to_add
= cu
->list_in_scope
;
18575 case DW_TAG_unspecified_parameters
:
18576 /* From varargs functions; gdb doesn't seem to have any
18577 interest in this information, so just ignore it for now.
18580 case DW_TAG_template_type_param
:
18582 /* Fall through. */
18583 case DW_TAG_class_type
:
18584 case DW_TAG_interface_type
:
18585 case DW_TAG_structure_type
:
18586 case DW_TAG_union_type
:
18587 case DW_TAG_set_type
:
18588 case DW_TAG_enumeration_type
:
18589 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18590 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18593 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18594 really ever be static objects: otherwise, if you try
18595 to, say, break of a class's method and you're in a file
18596 which doesn't mention that class, it won't work unless
18597 the check for all static symbols in lookup_symbol_aux
18598 saves you. See the OtherFileClass tests in
18599 gdb.c++/namespace.exp. */
18603 list_to_add
= (cu
->list_in_scope
== &file_symbols
18604 && (cu
->language
== language_cplus
18605 || cu
->language
== language_java
)
18606 ? &global_symbols
: cu
->list_in_scope
);
18608 /* The semantics of C++ state that "struct foo {
18609 ... }" also defines a typedef for "foo". A Java
18610 class declaration also defines a typedef for the
18612 if (cu
->language
== language_cplus
18613 || cu
->language
== language_java
18614 || cu
->language
== language_ada
18615 || cu
->language
== language_d
)
18617 /* The symbol's name is already allocated along
18618 with this objfile, so we don't need to
18619 duplicate it for the type. */
18620 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18621 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18626 case DW_TAG_typedef
:
18627 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18628 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18629 list_to_add
= cu
->list_in_scope
;
18631 case DW_TAG_base_type
:
18632 case DW_TAG_subrange_type
:
18633 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18634 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18635 list_to_add
= cu
->list_in_scope
;
18637 case DW_TAG_enumerator
:
18638 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18641 dwarf2_const_value (attr
, sym
, cu
);
18644 /* NOTE: carlton/2003-11-10: See comment above in the
18645 DW_TAG_class_type, etc. block. */
18647 list_to_add
= (cu
->list_in_scope
== &file_symbols
18648 && (cu
->language
== language_cplus
18649 || cu
->language
== language_java
)
18650 ? &global_symbols
: cu
->list_in_scope
);
18653 case DW_TAG_imported_declaration
:
18654 case DW_TAG_namespace
:
18655 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18656 list_to_add
= &global_symbols
;
18658 case DW_TAG_module
:
18659 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18660 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18661 list_to_add
= &global_symbols
;
18663 case DW_TAG_common_block
:
18664 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18665 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18666 add_symbol_to_list (sym
, cu
->list_in_scope
);
18669 /* Not a tag we recognize. Hopefully we aren't processing
18670 trash data, but since we must specifically ignore things
18671 we don't recognize, there is nothing else we should do at
18673 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18674 dwarf_tag_name (die
->tag
));
18680 sym
->hash_next
= objfile
->template_symbols
;
18681 objfile
->template_symbols
= sym
;
18682 list_to_add
= NULL
;
18685 if (list_to_add
!= NULL
)
18686 add_symbol_to_list (sym
, list_to_add
);
18688 /* For the benefit of old versions of GCC, check for anonymous
18689 namespaces based on the demangled name. */
18690 if (!cu
->processing_has_namespace_info
18691 && cu
->language
== language_cplus
)
18692 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18697 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18699 static struct symbol
*
18700 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18702 return new_symbol_full (die
, type
, cu
, NULL
);
18705 /* Given an attr with a DW_FORM_dataN value in host byte order,
18706 zero-extend it as appropriate for the symbol's type. The DWARF
18707 standard (v4) is not entirely clear about the meaning of using
18708 DW_FORM_dataN for a constant with a signed type, where the type is
18709 wider than the data. The conclusion of a discussion on the DWARF
18710 list was that this is unspecified. We choose to always zero-extend
18711 because that is the interpretation long in use by GCC. */
18714 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18715 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18717 struct objfile
*objfile
= cu
->objfile
;
18718 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18719 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18720 LONGEST l
= DW_UNSND (attr
);
18722 if (bits
< sizeof (*value
) * 8)
18724 l
&= ((LONGEST
) 1 << bits
) - 1;
18727 else if (bits
== sizeof (*value
) * 8)
18731 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18732 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18739 /* Read a constant value from an attribute. Either set *VALUE, or if
18740 the value does not fit in *VALUE, set *BYTES - either already
18741 allocated on the objfile obstack, or newly allocated on OBSTACK,
18742 or, set *BATON, if we translated the constant to a location
18746 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18747 const char *name
, struct obstack
*obstack
,
18748 struct dwarf2_cu
*cu
,
18749 LONGEST
*value
, const gdb_byte
**bytes
,
18750 struct dwarf2_locexpr_baton
**baton
)
18752 struct objfile
*objfile
= cu
->objfile
;
18753 struct comp_unit_head
*cu_header
= &cu
->header
;
18754 struct dwarf_block
*blk
;
18755 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18756 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18762 switch (attr
->form
)
18765 case DW_FORM_GNU_addr_index
:
18769 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18770 dwarf2_const_value_length_mismatch_complaint (name
,
18771 cu_header
->addr_size
,
18772 TYPE_LENGTH (type
));
18773 /* Symbols of this form are reasonably rare, so we just
18774 piggyback on the existing location code rather than writing
18775 a new implementation of symbol_computed_ops. */
18776 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18777 (*baton
)->per_cu
= cu
->per_cu
;
18778 gdb_assert ((*baton
)->per_cu
);
18780 (*baton
)->size
= 2 + cu_header
->addr_size
;
18781 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18782 (*baton
)->data
= data
;
18784 data
[0] = DW_OP_addr
;
18785 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18786 byte_order
, DW_ADDR (attr
));
18787 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18790 case DW_FORM_string
:
18792 case DW_FORM_GNU_str_index
:
18793 case DW_FORM_GNU_strp_alt
:
18794 /* DW_STRING is already allocated on the objfile obstack, point
18796 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18798 case DW_FORM_block1
:
18799 case DW_FORM_block2
:
18800 case DW_FORM_block4
:
18801 case DW_FORM_block
:
18802 case DW_FORM_exprloc
:
18803 blk
= DW_BLOCK (attr
);
18804 if (TYPE_LENGTH (type
) != blk
->size
)
18805 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18806 TYPE_LENGTH (type
));
18807 *bytes
= blk
->data
;
18810 /* The DW_AT_const_value attributes are supposed to carry the
18811 symbol's value "represented as it would be on the target
18812 architecture." By the time we get here, it's already been
18813 converted to host endianness, so we just need to sign- or
18814 zero-extend it as appropriate. */
18815 case DW_FORM_data1
:
18816 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18818 case DW_FORM_data2
:
18819 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18821 case DW_FORM_data4
:
18822 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18824 case DW_FORM_data8
:
18825 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18828 case DW_FORM_sdata
:
18829 *value
= DW_SND (attr
);
18832 case DW_FORM_udata
:
18833 *value
= DW_UNSND (attr
);
18837 complaint (&symfile_complaints
,
18838 _("unsupported const value attribute form: '%s'"),
18839 dwarf_form_name (attr
->form
));
18846 /* Copy constant value from an attribute to a symbol. */
18849 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18850 struct dwarf2_cu
*cu
)
18852 struct objfile
*objfile
= cu
->objfile
;
18853 struct comp_unit_head
*cu_header
= &cu
->header
;
18855 const gdb_byte
*bytes
;
18856 struct dwarf2_locexpr_baton
*baton
;
18858 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18859 SYMBOL_PRINT_NAME (sym
),
18860 &objfile
->objfile_obstack
, cu
,
18861 &value
, &bytes
, &baton
);
18865 SYMBOL_LOCATION_BATON (sym
) = baton
;
18866 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18868 else if (bytes
!= NULL
)
18870 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18871 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18875 SYMBOL_VALUE (sym
) = value
;
18876 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18880 /* Return the type of the die in question using its DW_AT_type attribute. */
18882 static struct type
*
18883 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18885 struct attribute
*type_attr
;
18887 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18890 /* A missing DW_AT_type represents a void type. */
18891 return objfile_type (cu
->objfile
)->builtin_void
;
18894 return lookup_die_type (die
, type_attr
, cu
);
18897 /* True iff CU's producer generates GNAT Ada auxiliary information
18898 that allows to find parallel types through that information instead
18899 of having to do expensive parallel lookups by type name. */
18902 need_gnat_info (struct dwarf2_cu
*cu
)
18904 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18905 of GNAT produces this auxiliary information, without any indication
18906 that it is produced. Part of enhancing the FSF version of GNAT
18907 to produce that information will be to put in place an indicator
18908 that we can use in order to determine whether the descriptive type
18909 info is available or not. One suggestion that has been made is
18910 to use a new attribute, attached to the CU die. For now, assume
18911 that the descriptive type info is not available. */
18915 /* Return the auxiliary type of the die in question using its
18916 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18917 attribute is not present. */
18919 static struct type
*
18920 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18922 struct attribute
*type_attr
;
18924 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18928 return lookup_die_type (die
, type_attr
, cu
);
18931 /* If DIE has a descriptive_type attribute, then set the TYPE's
18932 descriptive type accordingly. */
18935 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18936 struct dwarf2_cu
*cu
)
18938 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18940 if (descriptive_type
)
18942 ALLOCATE_GNAT_AUX_TYPE (type
);
18943 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18947 /* Return the containing type of the die in question using its
18948 DW_AT_containing_type attribute. */
18950 static struct type
*
18951 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18953 struct attribute
*type_attr
;
18955 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18957 error (_("Dwarf Error: Problem turning containing type into gdb type "
18958 "[in module %s]"), objfile_name (cu
->objfile
));
18960 return lookup_die_type (die
, type_attr
, cu
);
18963 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18965 static struct type
*
18966 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18968 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18969 char *message
, *saved
;
18971 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18972 objfile_name (objfile
),
18973 cu
->header
.offset
.sect_off
,
18974 die
->offset
.sect_off
);
18975 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18976 message
, strlen (message
));
18979 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18982 /* Look up the type of DIE in CU using its type attribute ATTR.
18983 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18984 DW_AT_containing_type.
18985 If there is no type substitute an error marker. */
18987 static struct type
*
18988 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18989 struct dwarf2_cu
*cu
)
18991 struct objfile
*objfile
= cu
->objfile
;
18992 struct type
*this_type
;
18994 gdb_assert (attr
->name
== DW_AT_type
18995 || attr
->name
== DW_AT_GNAT_descriptive_type
18996 || attr
->name
== DW_AT_containing_type
);
18998 /* First see if we have it cached. */
19000 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19002 struct dwarf2_per_cu_data
*per_cu
;
19003 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19005 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19006 this_type
= get_die_type_at_offset (offset
, per_cu
);
19008 else if (attr_form_is_ref (attr
))
19010 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19012 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19014 else if (attr
->form
== DW_FORM_ref_sig8
)
19016 ULONGEST signature
= DW_SIGNATURE (attr
);
19018 return get_signatured_type (die
, signature
, cu
);
19022 complaint (&symfile_complaints
,
19023 _("Dwarf Error: Bad type attribute %s in DIE"
19024 " at 0x%x [in module %s]"),
19025 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19026 objfile_name (objfile
));
19027 return build_error_marker_type (cu
, die
);
19030 /* If not cached we need to read it in. */
19032 if (this_type
== NULL
)
19034 struct die_info
*type_die
= NULL
;
19035 struct dwarf2_cu
*type_cu
= cu
;
19037 if (attr_form_is_ref (attr
))
19038 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19039 if (type_die
== NULL
)
19040 return build_error_marker_type (cu
, die
);
19041 /* If we find the type now, it's probably because the type came
19042 from an inter-CU reference and the type's CU got expanded before
19044 this_type
= read_type_die (type_die
, type_cu
);
19047 /* If we still don't have a type use an error marker. */
19049 if (this_type
== NULL
)
19050 return build_error_marker_type (cu
, die
);
19055 /* Return the type in DIE, CU.
19056 Returns NULL for invalid types.
19058 This first does a lookup in die_type_hash,
19059 and only reads the die in if necessary.
19061 NOTE: This can be called when reading in partial or full symbols. */
19063 static struct type
*
19064 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19066 struct type
*this_type
;
19068 this_type
= get_die_type (die
, cu
);
19072 return read_type_die_1 (die
, cu
);
19075 /* Read the type in DIE, CU.
19076 Returns NULL for invalid types. */
19078 static struct type
*
19079 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19081 struct type
*this_type
= NULL
;
19085 case DW_TAG_class_type
:
19086 case DW_TAG_interface_type
:
19087 case DW_TAG_structure_type
:
19088 case DW_TAG_union_type
:
19089 this_type
= read_structure_type (die
, cu
);
19091 case DW_TAG_enumeration_type
:
19092 this_type
= read_enumeration_type (die
, cu
);
19094 case DW_TAG_subprogram
:
19095 case DW_TAG_subroutine_type
:
19096 case DW_TAG_inlined_subroutine
:
19097 this_type
= read_subroutine_type (die
, cu
);
19099 case DW_TAG_array_type
:
19100 this_type
= read_array_type (die
, cu
);
19102 case DW_TAG_set_type
:
19103 this_type
= read_set_type (die
, cu
);
19105 case DW_TAG_pointer_type
:
19106 this_type
= read_tag_pointer_type (die
, cu
);
19108 case DW_TAG_ptr_to_member_type
:
19109 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19111 case DW_TAG_reference_type
:
19112 this_type
= read_tag_reference_type (die
, cu
);
19114 case DW_TAG_const_type
:
19115 this_type
= read_tag_const_type (die
, cu
);
19117 case DW_TAG_volatile_type
:
19118 this_type
= read_tag_volatile_type (die
, cu
);
19120 case DW_TAG_restrict_type
:
19121 this_type
= read_tag_restrict_type (die
, cu
);
19123 case DW_TAG_string_type
:
19124 this_type
= read_tag_string_type (die
, cu
);
19126 case DW_TAG_typedef
:
19127 this_type
= read_typedef (die
, cu
);
19129 case DW_TAG_subrange_type
:
19130 this_type
= read_subrange_type (die
, cu
);
19132 case DW_TAG_base_type
:
19133 this_type
= read_base_type (die
, cu
);
19135 case DW_TAG_unspecified_type
:
19136 this_type
= read_unspecified_type (die
, cu
);
19138 case DW_TAG_namespace
:
19139 this_type
= read_namespace_type (die
, cu
);
19141 case DW_TAG_module
:
19142 this_type
= read_module_type (die
, cu
);
19144 case DW_TAG_atomic_type
:
19145 this_type
= read_tag_atomic_type (die
, cu
);
19148 complaint (&symfile_complaints
,
19149 _("unexpected tag in read_type_die: '%s'"),
19150 dwarf_tag_name (die
->tag
));
19157 /* See if we can figure out if the class lives in a namespace. We do
19158 this by looking for a member function; its demangled name will
19159 contain namespace info, if there is any.
19160 Return the computed name or NULL.
19161 Space for the result is allocated on the objfile's obstack.
19162 This is the full-die version of guess_partial_die_structure_name.
19163 In this case we know DIE has no useful parent. */
19166 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19168 struct die_info
*spec_die
;
19169 struct dwarf2_cu
*spec_cu
;
19170 struct die_info
*child
;
19173 spec_die
= die_specification (die
, &spec_cu
);
19174 if (spec_die
!= NULL
)
19180 for (child
= die
->child
;
19182 child
= child
->sibling
)
19184 if (child
->tag
== DW_TAG_subprogram
)
19186 const char *linkage_name
;
19188 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19189 if (linkage_name
== NULL
)
19190 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19192 if (linkage_name
!= NULL
)
19195 = language_class_name_from_physname (cu
->language_defn
,
19199 if (actual_name
!= NULL
)
19201 const char *die_name
= dwarf2_name (die
, cu
);
19203 if (die_name
!= NULL
19204 && strcmp (die_name
, actual_name
) != 0)
19206 /* Strip off the class name from the full name.
19207 We want the prefix. */
19208 int die_name_len
= strlen (die_name
);
19209 int actual_name_len
= strlen (actual_name
);
19211 /* Test for '::' as a sanity check. */
19212 if (actual_name_len
> die_name_len
+ 2
19213 && actual_name
[actual_name_len
19214 - die_name_len
- 1] == ':')
19215 name
= (char *) obstack_copy0 (
19216 &cu
->objfile
->per_bfd
->storage_obstack
,
19217 actual_name
, actual_name_len
- die_name_len
- 2);
19220 xfree (actual_name
);
19229 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19230 prefix part in such case. See
19231 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19234 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19236 struct attribute
*attr
;
19239 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19240 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19243 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19246 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19248 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19249 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19252 /* dwarf2_name had to be already called. */
19253 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19255 /* Strip the base name, keep any leading namespaces/classes. */
19256 base
= strrchr (DW_STRING (attr
), ':');
19257 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19260 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19262 &base
[-1] - DW_STRING (attr
));
19265 /* Return the name of the namespace/class that DIE is defined within,
19266 or "" if we can't tell. The caller should not xfree the result.
19268 For example, if we're within the method foo() in the following
19278 then determine_prefix on foo's die will return "N::C". */
19280 static const char *
19281 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19283 struct die_info
*parent
, *spec_die
;
19284 struct dwarf2_cu
*spec_cu
;
19285 struct type
*parent_type
;
19288 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19289 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
)
19292 retval
= anonymous_struct_prefix (die
, cu
);
19296 /* We have to be careful in the presence of DW_AT_specification.
19297 For example, with GCC 3.4, given the code
19301 // Definition of N::foo.
19305 then we'll have a tree of DIEs like this:
19307 1: DW_TAG_compile_unit
19308 2: DW_TAG_namespace // N
19309 3: DW_TAG_subprogram // declaration of N::foo
19310 4: DW_TAG_subprogram // definition of N::foo
19311 DW_AT_specification // refers to die #3
19313 Thus, when processing die #4, we have to pretend that we're in
19314 the context of its DW_AT_specification, namely the contex of die
19317 spec_die
= die_specification (die
, &spec_cu
);
19318 if (spec_die
== NULL
)
19319 parent
= die
->parent
;
19322 parent
= spec_die
->parent
;
19326 if (parent
== NULL
)
19328 else if (parent
->building_fullname
)
19331 const char *parent_name
;
19333 /* It has been seen on RealView 2.2 built binaries,
19334 DW_TAG_template_type_param types actually _defined_ as
19335 children of the parent class:
19338 template class <class Enum> Class{};
19339 Class<enum E> class_e;
19341 1: DW_TAG_class_type (Class)
19342 2: DW_TAG_enumeration_type (E)
19343 3: DW_TAG_enumerator (enum1:0)
19344 3: DW_TAG_enumerator (enum2:1)
19346 2: DW_TAG_template_type_param
19347 DW_AT_type DW_FORM_ref_udata (E)
19349 Besides being broken debug info, it can put GDB into an
19350 infinite loop. Consider:
19352 When we're building the full name for Class<E>, we'll start
19353 at Class, and go look over its template type parameters,
19354 finding E. We'll then try to build the full name of E, and
19355 reach here. We're now trying to build the full name of E,
19356 and look over the parent DIE for containing scope. In the
19357 broken case, if we followed the parent DIE of E, we'd again
19358 find Class, and once again go look at its template type
19359 arguments, etc., etc. Simply don't consider such parent die
19360 as source-level parent of this die (it can't be, the language
19361 doesn't allow it), and break the loop here. */
19362 name
= dwarf2_name (die
, cu
);
19363 parent_name
= dwarf2_name (parent
, cu
);
19364 complaint (&symfile_complaints
,
19365 _("template param type '%s' defined within parent '%s'"),
19366 name
? name
: "<unknown>",
19367 parent_name
? parent_name
: "<unknown>");
19371 switch (parent
->tag
)
19373 case DW_TAG_namespace
:
19374 parent_type
= read_type_die (parent
, cu
);
19375 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19376 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19377 Work around this problem here. */
19378 if (cu
->language
== language_cplus
19379 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19381 /* We give a name to even anonymous namespaces. */
19382 return TYPE_TAG_NAME (parent_type
);
19383 case DW_TAG_class_type
:
19384 case DW_TAG_interface_type
:
19385 case DW_TAG_structure_type
:
19386 case DW_TAG_union_type
:
19387 case DW_TAG_module
:
19388 parent_type
= read_type_die (parent
, cu
);
19389 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19390 return TYPE_TAG_NAME (parent_type
);
19392 /* An anonymous structure is only allowed non-static data
19393 members; no typedefs, no member functions, et cetera.
19394 So it does not need a prefix. */
19396 case DW_TAG_compile_unit
:
19397 case DW_TAG_partial_unit
:
19398 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19399 if (cu
->language
== language_cplus
19400 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19401 && die
->child
!= NULL
19402 && (die
->tag
== DW_TAG_class_type
19403 || die
->tag
== DW_TAG_structure_type
19404 || die
->tag
== DW_TAG_union_type
))
19406 char *name
= guess_full_die_structure_name (die
, cu
);
19411 case DW_TAG_enumeration_type
:
19412 parent_type
= read_type_die (parent
, cu
);
19413 if (TYPE_DECLARED_CLASS (parent_type
))
19415 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19416 return TYPE_TAG_NAME (parent_type
);
19419 /* Fall through. */
19421 return determine_prefix (parent
, cu
);
19425 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19426 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19427 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19428 an obconcat, otherwise allocate storage for the result. The CU argument is
19429 used to determine the language and hence, the appropriate separator. */
19431 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19434 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19435 int physname
, struct dwarf2_cu
*cu
)
19437 const char *lead
= "";
19440 if (suffix
== NULL
|| suffix
[0] == '\0'
19441 || prefix
== NULL
|| prefix
[0] == '\0')
19443 else if (cu
->language
== language_java
)
19445 else if (cu
->language
== language_d
)
19447 /* For D, the 'main' function could be defined in any module, but it
19448 should never be prefixed. */
19449 if (strcmp (suffix
, "D main") == 0)
19457 else if (cu
->language
== language_fortran
&& physname
)
19459 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19460 DW_AT_MIPS_linkage_name is preferred and used instead. */
19468 if (prefix
== NULL
)
19470 if (suffix
== NULL
)
19477 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19479 strcpy (retval
, lead
);
19480 strcat (retval
, prefix
);
19481 strcat (retval
, sep
);
19482 strcat (retval
, suffix
);
19487 /* We have an obstack. */
19488 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19492 /* Return sibling of die, NULL if no sibling. */
19494 static struct die_info
*
19495 sibling_die (struct die_info
*die
)
19497 return die
->sibling
;
19500 /* Get name of a die, return NULL if not found. */
19502 static const char *
19503 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19504 struct obstack
*obstack
)
19506 if (name
&& cu
->language
== language_cplus
)
19508 char *canon_name
= cp_canonicalize_string (name
);
19510 if (canon_name
!= NULL
)
19512 if (strcmp (canon_name
, name
) != 0)
19513 name
= (const char *) obstack_copy0 (obstack
, canon_name
,
19514 strlen (canon_name
));
19515 xfree (canon_name
);
19522 /* Get name of a die, return NULL if not found.
19523 Anonymous namespaces are converted to their magic string. */
19525 static const char *
19526 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19528 struct attribute
*attr
;
19530 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19531 if ((!attr
|| !DW_STRING (attr
))
19532 && die
->tag
!= DW_TAG_namespace
19533 && die
->tag
!= DW_TAG_class_type
19534 && die
->tag
!= DW_TAG_interface_type
19535 && die
->tag
!= DW_TAG_structure_type
19536 && die
->tag
!= DW_TAG_union_type
)
19541 case DW_TAG_compile_unit
:
19542 case DW_TAG_partial_unit
:
19543 /* Compilation units have a DW_AT_name that is a filename, not
19544 a source language identifier. */
19545 case DW_TAG_enumeration_type
:
19546 case DW_TAG_enumerator
:
19547 /* These tags always have simple identifiers already; no need
19548 to canonicalize them. */
19549 return DW_STRING (attr
);
19551 case DW_TAG_namespace
:
19552 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19553 return DW_STRING (attr
);
19554 return CP_ANONYMOUS_NAMESPACE_STR
;
19556 case DW_TAG_subprogram
:
19557 /* Java constructors will all be named "<init>", so return
19558 the class name when we see this special case. */
19559 if (cu
->language
== language_java
19560 && DW_STRING (attr
) != NULL
19561 && strcmp (DW_STRING (attr
), "<init>") == 0)
19563 struct dwarf2_cu
*spec_cu
= cu
;
19564 struct die_info
*spec_die
;
19566 /* GCJ will output '<init>' for Java constructor names.
19567 For this special case, return the name of the parent class. */
19569 /* GCJ may output subprogram DIEs with AT_specification set.
19570 If so, use the name of the specified DIE. */
19571 spec_die
= die_specification (die
, &spec_cu
);
19572 if (spec_die
!= NULL
)
19573 return dwarf2_name (spec_die
, spec_cu
);
19578 if (die
->tag
== DW_TAG_class_type
)
19579 return dwarf2_name (die
, cu
);
19581 while (die
->tag
!= DW_TAG_compile_unit
19582 && die
->tag
!= DW_TAG_partial_unit
);
19586 case DW_TAG_class_type
:
19587 case DW_TAG_interface_type
:
19588 case DW_TAG_structure_type
:
19589 case DW_TAG_union_type
:
19590 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19591 structures or unions. These were of the form "._%d" in GCC 4.1,
19592 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19593 and GCC 4.4. We work around this problem by ignoring these. */
19594 if (attr
&& DW_STRING (attr
)
19595 && (startswith (DW_STRING (attr
), "._")
19596 || startswith (DW_STRING (attr
), "<anonymous")))
19599 /* GCC might emit a nameless typedef that has a linkage name. See
19600 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19601 if (!attr
|| DW_STRING (attr
) == NULL
)
19603 char *demangled
= NULL
;
19605 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19607 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19609 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19612 /* Avoid demangling DW_STRING (attr) the second time on a second
19613 call for the same DIE. */
19614 if (!DW_STRING_IS_CANONICAL (attr
))
19615 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19621 /* FIXME: we already did this for the partial symbol... */
19624 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19625 demangled
, strlen (demangled
)));
19626 DW_STRING_IS_CANONICAL (attr
) = 1;
19629 /* Strip any leading namespaces/classes, keep only the base name.
19630 DW_AT_name for named DIEs does not contain the prefixes. */
19631 base
= strrchr (DW_STRING (attr
), ':');
19632 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19635 return DW_STRING (attr
);
19644 if (!DW_STRING_IS_CANONICAL (attr
))
19647 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19648 &cu
->objfile
->per_bfd
->storage_obstack
);
19649 DW_STRING_IS_CANONICAL (attr
) = 1;
19651 return DW_STRING (attr
);
19654 /* Return the die that this die in an extension of, or NULL if there
19655 is none. *EXT_CU is the CU containing DIE on input, and the CU
19656 containing the return value on output. */
19658 static struct die_info
*
19659 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19661 struct attribute
*attr
;
19663 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19667 return follow_die_ref (die
, attr
, ext_cu
);
19670 /* Convert a DIE tag into its string name. */
19672 static const char *
19673 dwarf_tag_name (unsigned tag
)
19675 const char *name
= get_DW_TAG_name (tag
);
19678 return "DW_TAG_<unknown>";
19683 /* Convert a DWARF attribute code into its string name. */
19685 static const char *
19686 dwarf_attr_name (unsigned attr
)
19690 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19691 if (attr
== DW_AT_MIPS_fde
)
19692 return "DW_AT_MIPS_fde";
19694 if (attr
== DW_AT_HP_block_index
)
19695 return "DW_AT_HP_block_index";
19698 name
= get_DW_AT_name (attr
);
19701 return "DW_AT_<unknown>";
19706 /* Convert a DWARF value form code into its string name. */
19708 static const char *
19709 dwarf_form_name (unsigned form
)
19711 const char *name
= get_DW_FORM_name (form
);
19714 return "DW_FORM_<unknown>";
19720 dwarf_bool_name (unsigned mybool
)
19728 /* Convert a DWARF type code into its string name. */
19730 static const char *
19731 dwarf_type_encoding_name (unsigned enc
)
19733 const char *name
= get_DW_ATE_name (enc
);
19736 return "DW_ATE_<unknown>";
19742 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19746 print_spaces (indent
, f
);
19747 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19748 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19750 if (die
->parent
!= NULL
)
19752 print_spaces (indent
, f
);
19753 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19754 die
->parent
->offset
.sect_off
);
19757 print_spaces (indent
, f
);
19758 fprintf_unfiltered (f
, " has children: %s\n",
19759 dwarf_bool_name (die
->child
!= NULL
));
19761 print_spaces (indent
, f
);
19762 fprintf_unfiltered (f
, " attributes:\n");
19764 for (i
= 0; i
< die
->num_attrs
; ++i
)
19766 print_spaces (indent
, f
);
19767 fprintf_unfiltered (f
, " %s (%s) ",
19768 dwarf_attr_name (die
->attrs
[i
].name
),
19769 dwarf_form_name (die
->attrs
[i
].form
));
19771 switch (die
->attrs
[i
].form
)
19774 case DW_FORM_GNU_addr_index
:
19775 fprintf_unfiltered (f
, "address: ");
19776 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19778 case DW_FORM_block2
:
19779 case DW_FORM_block4
:
19780 case DW_FORM_block
:
19781 case DW_FORM_block1
:
19782 fprintf_unfiltered (f
, "block: size %s",
19783 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19785 case DW_FORM_exprloc
:
19786 fprintf_unfiltered (f
, "expression: size %s",
19787 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19789 case DW_FORM_ref_addr
:
19790 fprintf_unfiltered (f
, "ref address: ");
19791 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19793 case DW_FORM_GNU_ref_alt
:
19794 fprintf_unfiltered (f
, "alt ref address: ");
19795 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19801 case DW_FORM_ref_udata
:
19802 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19803 (long) (DW_UNSND (&die
->attrs
[i
])));
19805 case DW_FORM_data1
:
19806 case DW_FORM_data2
:
19807 case DW_FORM_data4
:
19808 case DW_FORM_data8
:
19809 case DW_FORM_udata
:
19810 case DW_FORM_sdata
:
19811 fprintf_unfiltered (f
, "constant: %s",
19812 pulongest (DW_UNSND (&die
->attrs
[i
])));
19814 case DW_FORM_sec_offset
:
19815 fprintf_unfiltered (f
, "section offset: %s",
19816 pulongest (DW_UNSND (&die
->attrs
[i
])));
19818 case DW_FORM_ref_sig8
:
19819 fprintf_unfiltered (f
, "signature: %s",
19820 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19822 case DW_FORM_string
:
19824 case DW_FORM_GNU_str_index
:
19825 case DW_FORM_GNU_strp_alt
:
19826 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19827 DW_STRING (&die
->attrs
[i
])
19828 ? DW_STRING (&die
->attrs
[i
]) : "",
19829 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19832 if (DW_UNSND (&die
->attrs
[i
]))
19833 fprintf_unfiltered (f
, "flag: TRUE");
19835 fprintf_unfiltered (f
, "flag: FALSE");
19837 case DW_FORM_flag_present
:
19838 fprintf_unfiltered (f
, "flag: TRUE");
19840 case DW_FORM_indirect
:
19841 /* The reader will have reduced the indirect form to
19842 the "base form" so this form should not occur. */
19843 fprintf_unfiltered (f
,
19844 "unexpected attribute form: DW_FORM_indirect");
19847 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19848 die
->attrs
[i
].form
);
19851 fprintf_unfiltered (f
, "\n");
19856 dump_die_for_error (struct die_info
*die
)
19858 dump_die_shallow (gdb_stderr
, 0, die
);
19862 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19864 int indent
= level
* 4;
19866 gdb_assert (die
!= NULL
);
19868 if (level
>= max_level
)
19871 dump_die_shallow (f
, indent
, die
);
19873 if (die
->child
!= NULL
)
19875 print_spaces (indent
, f
);
19876 fprintf_unfiltered (f
, " Children:");
19877 if (level
+ 1 < max_level
)
19879 fprintf_unfiltered (f
, "\n");
19880 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19884 fprintf_unfiltered (f
,
19885 " [not printed, max nesting level reached]\n");
19889 if (die
->sibling
!= NULL
&& level
> 0)
19891 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19895 /* This is called from the pdie macro in gdbinit.in.
19896 It's not static so gcc will keep a copy callable from gdb. */
19899 dump_die (struct die_info
*die
, int max_level
)
19901 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19905 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19909 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19915 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19919 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19921 sect_offset retval
= { DW_UNSND (attr
) };
19923 if (attr_form_is_ref (attr
))
19926 retval
.sect_off
= 0;
19927 complaint (&symfile_complaints
,
19928 _("unsupported die ref attribute form: '%s'"),
19929 dwarf_form_name (attr
->form
));
19933 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19934 * the value held by the attribute is not constant. */
19937 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19939 if (attr
->form
== DW_FORM_sdata
)
19940 return DW_SND (attr
);
19941 else if (attr
->form
== DW_FORM_udata
19942 || attr
->form
== DW_FORM_data1
19943 || attr
->form
== DW_FORM_data2
19944 || attr
->form
== DW_FORM_data4
19945 || attr
->form
== DW_FORM_data8
)
19946 return DW_UNSND (attr
);
19949 complaint (&symfile_complaints
,
19950 _("Attribute value is not a constant (%s)"),
19951 dwarf_form_name (attr
->form
));
19952 return default_value
;
19956 /* Follow reference or signature attribute ATTR of SRC_DIE.
19957 On entry *REF_CU is the CU of SRC_DIE.
19958 On exit *REF_CU is the CU of the result. */
19960 static struct die_info
*
19961 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19962 struct dwarf2_cu
**ref_cu
)
19964 struct die_info
*die
;
19966 if (attr_form_is_ref (attr
))
19967 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19968 else if (attr
->form
== DW_FORM_ref_sig8
)
19969 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19972 dump_die_for_error (src_die
);
19973 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19974 objfile_name ((*ref_cu
)->objfile
));
19980 /* Follow reference OFFSET.
19981 On entry *REF_CU is the CU of the source die referencing OFFSET.
19982 On exit *REF_CU is the CU of the result.
19983 Returns NULL if OFFSET is invalid. */
19985 static struct die_info
*
19986 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19987 struct dwarf2_cu
**ref_cu
)
19989 struct die_info temp_die
;
19990 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19992 gdb_assert (cu
->per_cu
!= NULL
);
19996 if (cu
->per_cu
->is_debug_types
)
19998 /* .debug_types CUs cannot reference anything outside their CU.
19999 If they need to, they have to reference a signatured type via
20000 DW_FORM_ref_sig8. */
20001 if (! offset_in_cu_p (&cu
->header
, offset
))
20004 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20005 || ! offset_in_cu_p (&cu
->header
, offset
))
20007 struct dwarf2_per_cu_data
*per_cu
;
20009 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
20012 /* If necessary, add it to the queue and load its DIEs. */
20013 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20014 load_full_comp_unit (per_cu
, cu
->language
);
20016 target_cu
= per_cu
->cu
;
20018 else if (cu
->dies
== NULL
)
20020 /* We're loading full DIEs during partial symbol reading. */
20021 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20022 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20025 *ref_cu
= target_cu
;
20026 temp_die
.offset
= offset
;
20027 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20028 &temp_die
, offset
.sect_off
);
20031 /* Follow reference attribute ATTR of SRC_DIE.
20032 On entry *REF_CU is the CU of SRC_DIE.
20033 On exit *REF_CU is the CU of the result. */
20035 static struct die_info
*
20036 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20037 struct dwarf2_cu
**ref_cu
)
20039 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20040 struct dwarf2_cu
*cu
= *ref_cu
;
20041 struct die_info
*die
;
20043 die
= follow_die_offset (offset
,
20044 (attr
->form
== DW_FORM_GNU_ref_alt
20045 || cu
->per_cu
->is_dwz
),
20048 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20049 "at 0x%x [in module %s]"),
20050 offset
.sect_off
, src_die
->offset
.sect_off
,
20051 objfile_name (cu
->objfile
));
20056 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20057 Returned value is intended for DW_OP_call*. Returned
20058 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20060 struct dwarf2_locexpr_baton
20061 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20062 struct dwarf2_per_cu_data
*per_cu
,
20063 CORE_ADDR (*get_frame_pc
) (void *baton
),
20066 struct dwarf2_cu
*cu
;
20067 struct die_info
*die
;
20068 struct attribute
*attr
;
20069 struct dwarf2_locexpr_baton retval
;
20071 dw2_setup (per_cu
->objfile
);
20073 if (per_cu
->cu
== NULL
)
20078 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20079 Instead just throw an error, not much else we can do. */
20080 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20081 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20084 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20086 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20087 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20089 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20092 /* DWARF: "If there is no such attribute, then there is no effect.".
20093 DATA is ignored if SIZE is 0. */
20095 retval
.data
= NULL
;
20098 else if (attr_form_is_section_offset (attr
))
20100 struct dwarf2_loclist_baton loclist_baton
;
20101 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20104 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20106 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20108 retval
.size
= size
;
20112 if (!attr_form_is_block (attr
))
20113 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20114 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20115 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20117 retval
.data
= DW_BLOCK (attr
)->data
;
20118 retval
.size
= DW_BLOCK (attr
)->size
;
20120 retval
.per_cu
= cu
->per_cu
;
20122 age_cached_comp_units ();
20127 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20130 struct dwarf2_locexpr_baton
20131 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20132 struct dwarf2_per_cu_data
*per_cu
,
20133 CORE_ADDR (*get_frame_pc
) (void *baton
),
20136 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20138 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20141 /* Write a constant of a given type as target-ordered bytes into
20144 static const gdb_byte
*
20145 write_constant_as_bytes (struct obstack
*obstack
,
20146 enum bfd_endian byte_order
,
20153 *len
= TYPE_LENGTH (type
);
20154 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20155 store_unsigned_integer (result
, *len
, byte_order
, value
);
20160 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20161 pointer to the constant bytes and set LEN to the length of the
20162 data. If memory is needed, allocate it on OBSTACK. If the DIE
20163 does not have a DW_AT_const_value, return NULL. */
20166 dwarf2_fetch_constant_bytes (sect_offset offset
,
20167 struct dwarf2_per_cu_data
*per_cu
,
20168 struct obstack
*obstack
,
20171 struct dwarf2_cu
*cu
;
20172 struct die_info
*die
;
20173 struct attribute
*attr
;
20174 const gdb_byte
*result
= NULL
;
20177 enum bfd_endian byte_order
;
20179 dw2_setup (per_cu
->objfile
);
20181 if (per_cu
->cu
== NULL
)
20186 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20187 Instead just throw an error, not much else we can do. */
20188 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20189 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20192 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20194 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20195 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20198 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20202 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20203 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20205 switch (attr
->form
)
20208 case DW_FORM_GNU_addr_index
:
20212 *len
= cu
->header
.addr_size
;
20213 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20214 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20218 case DW_FORM_string
:
20220 case DW_FORM_GNU_str_index
:
20221 case DW_FORM_GNU_strp_alt
:
20222 /* DW_STRING is already allocated on the objfile obstack, point
20224 result
= (const gdb_byte
*) DW_STRING (attr
);
20225 *len
= strlen (DW_STRING (attr
));
20227 case DW_FORM_block1
:
20228 case DW_FORM_block2
:
20229 case DW_FORM_block4
:
20230 case DW_FORM_block
:
20231 case DW_FORM_exprloc
:
20232 result
= DW_BLOCK (attr
)->data
;
20233 *len
= DW_BLOCK (attr
)->size
;
20236 /* The DW_AT_const_value attributes are supposed to carry the
20237 symbol's value "represented as it would be on the target
20238 architecture." By the time we get here, it's already been
20239 converted to host endianness, so we just need to sign- or
20240 zero-extend it as appropriate. */
20241 case DW_FORM_data1
:
20242 type
= die_type (die
, cu
);
20243 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20244 if (result
== NULL
)
20245 result
= write_constant_as_bytes (obstack
, byte_order
,
20248 case DW_FORM_data2
:
20249 type
= die_type (die
, cu
);
20250 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20251 if (result
== NULL
)
20252 result
= write_constant_as_bytes (obstack
, byte_order
,
20255 case DW_FORM_data4
:
20256 type
= die_type (die
, cu
);
20257 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20258 if (result
== NULL
)
20259 result
= write_constant_as_bytes (obstack
, byte_order
,
20262 case DW_FORM_data8
:
20263 type
= die_type (die
, cu
);
20264 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20265 if (result
== NULL
)
20266 result
= write_constant_as_bytes (obstack
, byte_order
,
20270 case DW_FORM_sdata
:
20271 type
= die_type (die
, cu
);
20272 result
= write_constant_as_bytes (obstack
, byte_order
,
20273 type
, DW_SND (attr
), len
);
20276 case DW_FORM_udata
:
20277 type
= die_type (die
, cu
);
20278 result
= write_constant_as_bytes (obstack
, byte_order
,
20279 type
, DW_UNSND (attr
), len
);
20283 complaint (&symfile_complaints
,
20284 _("unsupported const value attribute form: '%s'"),
20285 dwarf_form_name (attr
->form
));
20292 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20296 dwarf2_get_die_type (cu_offset die_offset
,
20297 struct dwarf2_per_cu_data
*per_cu
)
20299 sect_offset die_offset_sect
;
20301 dw2_setup (per_cu
->objfile
);
20303 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20304 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20307 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20308 On entry *REF_CU is the CU of SRC_DIE.
20309 On exit *REF_CU is the CU of the result.
20310 Returns NULL if the referenced DIE isn't found. */
20312 static struct die_info
*
20313 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20314 struct dwarf2_cu
**ref_cu
)
20316 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20317 struct die_info temp_die
;
20318 struct dwarf2_cu
*sig_cu
;
20319 struct die_info
*die
;
20321 /* While it might be nice to assert sig_type->type == NULL here,
20322 we can get here for DW_AT_imported_declaration where we need
20323 the DIE not the type. */
20325 /* If necessary, add it to the queue and load its DIEs. */
20327 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20328 read_signatured_type (sig_type
);
20330 sig_cu
= sig_type
->per_cu
.cu
;
20331 gdb_assert (sig_cu
!= NULL
);
20332 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20333 temp_die
.offset
= sig_type
->type_offset_in_section
;
20334 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20335 temp_die
.offset
.sect_off
);
20338 /* For .gdb_index version 7 keep track of included TUs.
20339 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20340 if (dwarf2_per_objfile
->index_table
!= NULL
20341 && dwarf2_per_objfile
->index_table
->version
<= 7)
20343 VEC_safe_push (dwarf2_per_cu_ptr
,
20344 (*ref_cu
)->per_cu
->imported_symtabs
,
20355 /* Follow signatured type referenced by ATTR in SRC_DIE.
20356 On entry *REF_CU is the CU of SRC_DIE.
20357 On exit *REF_CU is the CU of the result.
20358 The result is the DIE of the type.
20359 If the referenced type cannot be found an error is thrown. */
20361 static struct die_info
*
20362 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20363 struct dwarf2_cu
**ref_cu
)
20365 ULONGEST signature
= DW_SIGNATURE (attr
);
20366 struct signatured_type
*sig_type
;
20367 struct die_info
*die
;
20369 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20371 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20372 /* sig_type will be NULL if the signatured type is missing from
20374 if (sig_type
== NULL
)
20376 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20377 " from DIE at 0x%x [in module %s]"),
20378 hex_string (signature
), src_die
->offset
.sect_off
,
20379 objfile_name ((*ref_cu
)->objfile
));
20382 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20385 dump_die_for_error (src_die
);
20386 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20387 " from DIE at 0x%x [in module %s]"),
20388 hex_string (signature
), src_die
->offset
.sect_off
,
20389 objfile_name ((*ref_cu
)->objfile
));
20395 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20396 reading in and processing the type unit if necessary. */
20398 static struct type
*
20399 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20400 struct dwarf2_cu
*cu
)
20402 struct signatured_type
*sig_type
;
20403 struct dwarf2_cu
*type_cu
;
20404 struct die_info
*type_die
;
20407 sig_type
= lookup_signatured_type (cu
, signature
);
20408 /* sig_type will be NULL if the signatured type is missing from
20410 if (sig_type
== NULL
)
20412 complaint (&symfile_complaints
,
20413 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20414 " from DIE at 0x%x [in module %s]"),
20415 hex_string (signature
), die
->offset
.sect_off
,
20416 objfile_name (dwarf2_per_objfile
->objfile
));
20417 return build_error_marker_type (cu
, die
);
20420 /* If we already know the type we're done. */
20421 if (sig_type
->type
!= NULL
)
20422 return sig_type
->type
;
20425 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20426 if (type_die
!= NULL
)
20428 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20429 is created. This is important, for example, because for c++ classes
20430 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20431 type
= read_type_die (type_die
, type_cu
);
20434 complaint (&symfile_complaints
,
20435 _("Dwarf Error: Cannot build signatured type %s"
20436 " referenced from DIE at 0x%x [in module %s]"),
20437 hex_string (signature
), die
->offset
.sect_off
,
20438 objfile_name (dwarf2_per_objfile
->objfile
));
20439 type
= build_error_marker_type (cu
, die
);
20444 complaint (&symfile_complaints
,
20445 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20446 " from DIE at 0x%x [in module %s]"),
20447 hex_string (signature
), die
->offset
.sect_off
,
20448 objfile_name (dwarf2_per_objfile
->objfile
));
20449 type
= build_error_marker_type (cu
, die
);
20451 sig_type
->type
= type
;
20456 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20457 reading in and processing the type unit if necessary. */
20459 static struct type
*
20460 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20461 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20463 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20464 if (attr_form_is_ref (attr
))
20466 struct dwarf2_cu
*type_cu
= cu
;
20467 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20469 return read_type_die (type_die
, type_cu
);
20471 else if (attr
->form
== DW_FORM_ref_sig8
)
20473 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20477 complaint (&symfile_complaints
,
20478 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20479 " at 0x%x [in module %s]"),
20480 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20481 objfile_name (dwarf2_per_objfile
->objfile
));
20482 return build_error_marker_type (cu
, die
);
20486 /* Load the DIEs associated with type unit PER_CU into memory. */
20489 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20491 struct signatured_type
*sig_type
;
20493 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20494 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20496 /* We have the per_cu, but we need the signatured_type.
20497 Fortunately this is an easy translation. */
20498 gdb_assert (per_cu
->is_debug_types
);
20499 sig_type
= (struct signatured_type
*) per_cu
;
20501 gdb_assert (per_cu
->cu
== NULL
);
20503 read_signatured_type (sig_type
);
20505 gdb_assert (per_cu
->cu
!= NULL
);
20508 /* die_reader_func for read_signatured_type.
20509 This is identical to load_full_comp_unit_reader,
20510 but is kept separate for now. */
20513 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20514 const gdb_byte
*info_ptr
,
20515 struct die_info
*comp_unit_die
,
20519 struct dwarf2_cu
*cu
= reader
->cu
;
20521 gdb_assert (cu
->die_hash
== NULL
);
20523 htab_create_alloc_ex (cu
->header
.length
/ 12,
20527 &cu
->comp_unit_obstack
,
20528 hashtab_obstack_allocate
,
20529 dummy_obstack_deallocate
);
20532 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20533 &info_ptr
, comp_unit_die
);
20534 cu
->dies
= comp_unit_die
;
20535 /* comp_unit_die is not stored in die_hash, no need. */
20537 /* We try not to read any attributes in this function, because not
20538 all CUs needed for references have been loaded yet, and symbol
20539 table processing isn't initialized. But we have to set the CU language,
20540 or we won't be able to build types correctly.
20541 Similarly, if we do not read the producer, we can not apply
20542 producer-specific interpretation. */
20543 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20546 /* Read in a signatured type and build its CU and DIEs.
20547 If the type is a stub for the real type in a DWO file,
20548 read in the real type from the DWO file as well. */
20551 read_signatured_type (struct signatured_type
*sig_type
)
20553 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20555 gdb_assert (per_cu
->is_debug_types
);
20556 gdb_assert (per_cu
->cu
== NULL
);
20558 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20559 read_signatured_type_reader
, NULL
);
20560 sig_type
->per_cu
.tu_read
= 1;
20563 /* Decode simple location descriptions.
20564 Given a pointer to a dwarf block that defines a location, compute
20565 the location and return the value.
20567 NOTE drow/2003-11-18: This function is called in two situations
20568 now: for the address of static or global variables (partial symbols
20569 only) and for offsets into structures which are expected to be
20570 (more or less) constant. The partial symbol case should go away,
20571 and only the constant case should remain. That will let this
20572 function complain more accurately. A few special modes are allowed
20573 without complaint for global variables (for instance, global
20574 register values and thread-local values).
20576 A location description containing no operations indicates that the
20577 object is optimized out. The return value is 0 for that case.
20578 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20579 callers will only want a very basic result and this can become a
20582 Note that stack[0] is unused except as a default error return. */
20585 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20587 struct objfile
*objfile
= cu
->objfile
;
20589 size_t size
= blk
->size
;
20590 const gdb_byte
*data
= blk
->data
;
20591 CORE_ADDR stack
[64];
20593 unsigned int bytes_read
, unsnd
;
20599 stack
[++stacki
] = 0;
20638 stack
[++stacki
] = op
- DW_OP_lit0
;
20673 stack
[++stacki
] = op
- DW_OP_reg0
;
20675 dwarf2_complex_location_expr_complaint ();
20679 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20681 stack
[++stacki
] = unsnd
;
20683 dwarf2_complex_location_expr_complaint ();
20687 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20692 case DW_OP_const1u
:
20693 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20697 case DW_OP_const1s
:
20698 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20702 case DW_OP_const2u
:
20703 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20707 case DW_OP_const2s
:
20708 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20712 case DW_OP_const4u
:
20713 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20717 case DW_OP_const4s
:
20718 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20722 case DW_OP_const8u
:
20723 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20728 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20734 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20739 stack
[stacki
+ 1] = stack
[stacki
];
20744 stack
[stacki
- 1] += stack
[stacki
];
20748 case DW_OP_plus_uconst
:
20749 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20755 stack
[stacki
- 1] -= stack
[stacki
];
20760 /* If we're not the last op, then we definitely can't encode
20761 this using GDB's address_class enum. This is valid for partial
20762 global symbols, although the variable's address will be bogus
20765 dwarf2_complex_location_expr_complaint ();
20768 case DW_OP_GNU_push_tls_address
:
20769 /* The top of the stack has the offset from the beginning
20770 of the thread control block at which the variable is located. */
20771 /* Nothing should follow this operator, so the top of stack would
20773 /* This is valid for partial global symbols, but the variable's
20774 address will be bogus in the psymtab. Make it always at least
20775 non-zero to not look as a variable garbage collected by linker
20776 which have DW_OP_addr 0. */
20778 dwarf2_complex_location_expr_complaint ();
20782 case DW_OP_GNU_uninit
:
20785 case DW_OP_GNU_addr_index
:
20786 case DW_OP_GNU_const_index
:
20787 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20794 const char *name
= get_DW_OP_name (op
);
20797 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20800 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20804 return (stack
[stacki
]);
20807 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20808 outside of the allocated space. Also enforce minimum>0. */
20809 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20811 complaint (&symfile_complaints
,
20812 _("location description stack overflow"));
20818 complaint (&symfile_complaints
,
20819 _("location description stack underflow"));
20823 return (stack
[stacki
]);
20826 /* memory allocation interface */
20828 static struct dwarf_block
*
20829 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20831 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20834 static struct die_info
*
20835 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20837 struct die_info
*die
;
20838 size_t size
= sizeof (struct die_info
);
20841 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20843 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20844 memset (die
, 0, sizeof (struct die_info
));
20849 /* Macro support. */
20851 /* Return file name relative to the compilation directory of file number I in
20852 *LH's file name table. The result is allocated using xmalloc; the caller is
20853 responsible for freeing it. */
20856 file_file_name (int file
, struct line_header
*lh
)
20858 /* Is the file number a valid index into the line header's file name
20859 table? Remember that file numbers start with one, not zero. */
20860 if (1 <= file
&& file
<= lh
->num_file_names
)
20862 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20864 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20865 || lh
->include_dirs
== NULL
)
20866 return xstrdup (fe
->name
);
20867 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20872 /* The compiler produced a bogus file number. We can at least
20873 record the macro definitions made in the file, even if we
20874 won't be able to find the file by name. */
20875 char fake_name
[80];
20877 xsnprintf (fake_name
, sizeof (fake_name
),
20878 "<bad macro file number %d>", file
);
20880 complaint (&symfile_complaints
,
20881 _("bad file number in macro information (%d)"),
20884 return xstrdup (fake_name
);
20888 /* Return the full name of file number I in *LH's file name table.
20889 Use COMP_DIR as the name of the current directory of the
20890 compilation. The result is allocated using xmalloc; the caller is
20891 responsible for freeing it. */
20893 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20895 /* Is the file number a valid index into the line header's file name
20896 table? Remember that file numbers start with one, not zero. */
20897 if (1 <= file
&& file
<= lh
->num_file_names
)
20899 char *relative
= file_file_name (file
, lh
);
20901 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20903 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20906 return file_file_name (file
, lh
);
20910 static struct macro_source_file
*
20911 macro_start_file (int file
, int line
,
20912 struct macro_source_file
*current_file
,
20913 struct line_header
*lh
)
20915 /* File name relative to the compilation directory of this source file. */
20916 char *file_name
= file_file_name (file
, lh
);
20918 if (! current_file
)
20920 /* Note: We don't create a macro table for this compilation unit
20921 at all until we actually get a filename. */
20922 struct macro_table
*macro_table
= get_macro_table ();
20924 /* If we have no current file, then this must be the start_file
20925 directive for the compilation unit's main source file. */
20926 current_file
= macro_set_main (macro_table
, file_name
);
20927 macro_define_special (macro_table
);
20930 current_file
= macro_include (current_file
, line
, file_name
);
20934 return current_file
;
20938 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20939 followed by a null byte. */
20941 copy_string (const char *buf
, int len
)
20943 char *s
= (char *) xmalloc (len
+ 1);
20945 memcpy (s
, buf
, len
);
20951 static const char *
20952 consume_improper_spaces (const char *p
, const char *body
)
20956 complaint (&symfile_complaints
,
20957 _("macro definition contains spaces "
20958 "in formal argument list:\n`%s'"),
20970 parse_macro_definition (struct macro_source_file
*file
, int line
,
20975 /* The body string takes one of two forms. For object-like macro
20976 definitions, it should be:
20978 <macro name> " " <definition>
20980 For function-like macro definitions, it should be:
20982 <macro name> "() " <definition>
20984 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20986 Spaces may appear only where explicitly indicated, and in the
20989 The Dwarf 2 spec says that an object-like macro's name is always
20990 followed by a space, but versions of GCC around March 2002 omit
20991 the space when the macro's definition is the empty string.
20993 The Dwarf 2 spec says that there should be no spaces between the
20994 formal arguments in a function-like macro's formal argument list,
20995 but versions of GCC around March 2002 include spaces after the
20999 /* Find the extent of the macro name. The macro name is terminated
21000 by either a space or null character (for an object-like macro) or
21001 an opening paren (for a function-like macro). */
21002 for (p
= body
; *p
; p
++)
21003 if (*p
== ' ' || *p
== '(')
21006 if (*p
== ' ' || *p
== '\0')
21008 /* It's an object-like macro. */
21009 int name_len
= p
- body
;
21010 char *name
= copy_string (body
, name_len
);
21011 const char *replacement
;
21014 replacement
= body
+ name_len
+ 1;
21017 dwarf2_macro_malformed_definition_complaint (body
);
21018 replacement
= body
+ name_len
;
21021 macro_define_object (file
, line
, name
, replacement
);
21025 else if (*p
== '(')
21027 /* It's a function-like macro. */
21028 char *name
= copy_string (body
, p
- body
);
21031 char **argv
= XNEWVEC (char *, argv_size
);
21035 p
= consume_improper_spaces (p
, body
);
21037 /* Parse the formal argument list. */
21038 while (*p
&& *p
!= ')')
21040 /* Find the extent of the current argument name. */
21041 const char *arg_start
= p
;
21043 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21046 if (! *p
|| p
== arg_start
)
21047 dwarf2_macro_malformed_definition_complaint (body
);
21050 /* Make sure argv has room for the new argument. */
21051 if (argc
>= argv_size
)
21054 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21057 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21060 p
= consume_improper_spaces (p
, body
);
21062 /* Consume the comma, if present. */
21067 p
= consume_improper_spaces (p
, body
);
21076 /* Perfectly formed definition, no complaints. */
21077 macro_define_function (file
, line
, name
,
21078 argc
, (const char **) argv
,
21080 else if (*p
== '\0')
21082 /* Complain, but do define it. */
21083 dwarf2_macro_malformed_definition_complaint (body
);
21084 macro_define_function (file
, line
, name
,
21085 argc
, (const char **) argv
,
21089 /* Just complain. */
21090 dwarf2_macro_malformed_definition_complaint (body
);
21093 /* Just complain. */
21094 dwarf2_macro_malformed_definition_complaint (body
);
21100 for (i
= 0; i
< argc
; i
++)
21106 dwarf2_macro_malformed_definition_complaint (body
);
21109 /* Skip some bytes from BYTES according to the form given in FORM.
21110 Returns the new pointer. */
21112 static const gdb_byte
*
21113 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21114 enum dwarf_form form
,
21115 unsigned int offset_size
,
21116 struct dwarf2_section_info
*section
)
21118 unsigned int bytes_read
;
21122 case DW_FORM_data1
:
21127 case DW_FORM_data2
:
21131 case DW_FORM_data4
:
21135 case DW_FORM_data8
:
21139 case DW_FORM_string
:
21140 read_direct_string (abfd
, bytes
, &bytes_read
);
21141 bytes
+= bytes_read
;
21144 case DW_FORM_sec_offset
:
21146 case DW_FORM_GNU_strp_alt
:
21147 bytes
+= offset_size
;
21150 case DW_FORM_block
:
21151 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21152 bytes
+= bytes_read
;
21155 case DW_FORM_block1
:
21156 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21158 case DW_FORM_block2
:
21159 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21161 case DW_FORM_block4
:
21162 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21165 case DW_FORM_sdata
:
21166 case DW_FORM_udata
:
21167 case DW_FORM_GNU_addr_index
:
21168 case DW_FORM_GNU_str_index
:
21169 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21172 dwarf2_section_buffer_overflow_complaint (section
);
21180 complaint (&symfile_complaints
,
21181 _("invalid form 0x%x in `%s'"),
21182 form
, get_section_name (section
));
21190 /* A helper for dwarf_decode_macros that handles skipping an unknown
21191 opcode. Returns an updated pointer to the macro data buffer; or,
21192 on error, issues a complaint and returns NULL. */
21194 static const gdb_byte
*
21195 skip_unknown_opcode (unsigned int opcode
,
21196 const gdb_byte
**opcode_definitions
,
21197 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21199 unsigned int offset_size
,
21200 struct dwarf2_section_info
*section
)
21202 unsigned int bytes_read
, i
;
21204 const gdb_byte
*defn
;
21206 if (opcode_definitions
[opcode
] == NULL
)
21208 complaint (&symfile_complaints
,
21209 _("unrecognized DW_MACFINO opcode 0x%x"),
21214 defn
= opcode_definitions
[opcode
];
21215 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21216 defn
+= bytes_read
;
21218 for (i
= 0; i
< arg
; ++i
)
21220 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21221 (enum dwarf_form
) defn
[i
], offset_size
,
21223 if (mac_ptr
== NULL
)
21225 /* skip_form_bytes already issued the complaint. */
21233 /* A helper function which parses the header of a macro section.
21234 If the macro section is the extended (for now called "GNU") type,
21235 then this updates *OFFSET_SIZE. Returns a pointer to just after
21236 the header, or issues a complaint and returns NULL on error. */
21238 static const gdb_byte
*
21239 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21241 const gdb_byte
*mac_ptr
,
21242 unsigned int *offset_size
,
21243 int section_is_gnu
)
21245 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21247 if (section_is_gnu
)
21249 unsigned int version
, flags
;
21251 version
= read_2_bytes (abfd
, mac_ptr
);
21254 complaint (&symfile_complaints
,
21255 _("unrecognized version `%d' in .debug_macro section"),
21261 flags
= read_1_byte (abfd
, mac_ptr
);
21263 *offset_size
= (flags
& 1) ? 8 : 4;
21265 if ((flags
& 2) != 0)
21266 /* We don't need the line table offset. */
21267 mac_ptr
+= *offset_size
;
21269 /* Vendor opcode descriptions. */
21270 if ((flags
& 4) != 0)
21272 unsigned int i
, count
;
21274 count
= read_1_byte (abfd
, mac_ptr
);
21276 for (i
= 0; i
< count
; ++i
)
21278 unsigned int opcode
, bytes_read
;
21281 opcode
= read_1_byte (abfd
, mac_ptr
);
21283 opcode_definitions
[opcode
] = mac_ptr
;
21284 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21285 mac_ptr
+= bytes_read
;
21294 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21295 including DW_MACRO_GNU_transparent_include. */
21298 dwarf_decode_macro_bytes (bfd
*abfd
,
21299 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21300 struct macro_source_file
*current_file
,
21301 struct line_header
*lh
,
21302 struct dwarf2_section_info
*section
,
21303 int section_is_gnu
, int section_is_dwz
,
21304 unsigned int offset_size
,
21305 htab_t include_hash
)
21307 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21308 enum dwarf_macro_record_type macinfo_type
;
21309 int at_commandline
;
21310 const gdb_byte
*opcode_definitions
[256];
21312 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21313 &offset_size
, section_is_gnu
);
21314 if (mac_ptr
== NULL
)
21316 /* We already issued a complaint. */
21320 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21321 GDB is still reading the definitions from command line. First
21322 DW_MACINFO_start_file will need to be ignored as it was already executed
21323 to create CURRENT_FILE for the main source holding also the command line
21324 definitions. On first met DW_MACINFO_start_file this flag is reset to
21325 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21327 at_commandline
= 1;
21331 /* Do we at least have room for a macinfo type byte? */
21332 if (mac_ptr
>= mac_end
)
21334 dwarf2_section_buffer_overflow_complaint (section
);
21338 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21341 /* Note that we rely on the fact that the corresponding GNU and
21342 DWARF constants are the same. */
21343 switch (macinfo_type
)
21345 /* A zero macinfo type indicates the end of the macro
21350 case DW_MACRO_GNU_define
:
21351 case DW_MACRO_GNU_undef
:
21352 case DW_MACRO_GNU_define_indirect
:
21353 case DW_MACRO_GNU_undef_indirect
:
21354 case DW_MACRO_GNU_define_indirect_alt
:
21355 case DW_MACRO_GNU_undef_indirect_alt
:
21357 unsigned int bytes_read
;
21362 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21363 mac_ptr
+= bytes_read
;
21365 if (macinfo_type
== DW_MACRO_GNU_define
21366 || macinfo_type
== DW_MACRO_GNU_undef
)
21368 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21369 mac_ptr
+= bytes_read
;
21373 LONGEST str_offset
;
21375 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21376 mac_ptr
+= offset_size
;
21378 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21379 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21382 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21384 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21387 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21390 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21391 || macinfo_type
== DW_MACRO_GNU_define_indirect
21392 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21393 if (! current_file
)
21395 /* DWARF violation as no main source is present. */
21396 complaint (&symfile_complaints
,
21397 _("debug info with no main source gives macro %s "
21399 is_define
? _("definition") : _("undefinition"),
21403 if ((line
== 0 && !at_commandline
)
21404 || (line
!= 0 && at_commandline
))
21405 complaint (&symfile_complaints
,
21406 _("debug info gives %s macro %s with %s line %d: %s"),
21407 at_commandline
? _("command-line") : _("in-file"),
21408 is_define
? _("definition") : _("undefinition"),
21409 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21412 parse_macro_definition (current_file
, line
, body
);
21415 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21416 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21417 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21418 macro_undef (current_file
, line
, body
);
21423 case DW_MACRO_GNU_start_file
:
21425 unsigned int bytes_read
;
21428 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21429 mac_ptr
+= bytes_read
;
21430 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21431 mac_ptr
+= bytes_read
;
21433 if ((line
== 0 && !at_commandline
)
21434 || (line
!= 0 && at_commandline
))
21435 complaint (&symfile_complaints
,
21436 _("debug info gives source %d included "
21437 "from %s at %s line %d"),
21438 file
, at_commandline
? _("command-line") : _("file"),
21439 line
== 0 ? _("zero") : _("non-zero"), line
);
21441 if (at_commandline
)
21443 /* This DW_MACRO_GNU_start_file was executed in the
21445 at_commandline
= 0;
21448 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21452 case DW_MACRO_GNU_end_file
:
21453 if (! current_file
)
21454 complaint (&symfile_complaints
,
21455 _("macro debug info has an unmatched "
21456 "`close_file' directive"));
21459 current_file
= current_file
->included_by
;
21460 if (! current_file
)
21462 enum dwarf_macro_record_type next_type
;
21464 /* GCC circa March 2002 doesn't produce the zero
21465 type byte marking the end of the compilation
21466 unit. Complain if it's not there, but exit no
21469 /* Do we at least have room for a macinfo type byte? */
21470 if (mac_ptr
>= mac_end
)
21472 dwarf2_section_buffer_overflow_complaint (section
);
21476 /* We don't increment mac_ptr here, so this is just
21479 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21481 if (next_type
!= 0)
21482 complaint (&symfile_complaints
,
21483 _("no terminating 0-type entry for "
21484 "macros in `.debug_macinfo' section"));
21491 case DW_MACRO_GNU_transparent_include
:
21492 case DW_MACRO_GNU_transparent_include_alt
:
21496 bfd
*include_bfd
= abfd
;
21497 struct dwarf2_section_info
*include_section
= section
;
21498 struct dwarf2_section_info alt_section
;
21499 const gdb_byte
*include_mac_end
= mac_end
;
21500 int is_dwz
= section_is_dwz
;
21501 const gdb_byte
*new_mac_ptr
;
21503 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21504 mac_ptr
+= offset_size
;
21506 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21508 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21510 dwarf2_read_section (objfile
, &dwz
->macro
);
21512 include_section
= &dwz
->macro
;
21513 include_bfd
= get_section_bfd_owner (include_section
);
21514 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21518 new_mac_ptr
= include_section
->buffer
+ offset
;
21519 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21523 /* This has actually happened; see
21524 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21525 complaint (&symfile_complaints
,
21526 _("recursive DW_MACRO_GNU_transparent_include in "
21527 ".debug_macro section"));
21531 *slot
= (void *) new_mac_ptr
;
21533 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21534 include_mac_end
, current_file
, lh
,
21535 section
, section_is_gnu
, is_dwz
,
21536 offset_size
, include_hash
);
21538 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21543 case DW_MACINFO_vendor_ext
:
21544 if (!section_is_gnu
)
21546 unsigned int bytes_read
;
21549 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21550 mac_ptr
+= bytes_read
;
21551 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21552 mac_ptr
+= bytes_read
;
21554 /* We don't recognize any vendor extensions. */
21560 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21561 mac_ptr
, mac_end
, abfd
, offset_size
,
21563 if (mac_ptr
== NULL
)
21567 } while (macinfo_type
!= 0);
21571 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21572 int section_is_gnu
)
21574 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21575 struct line_header
*lh
= cu
->line_header
;
21577 const gdb_byte
*mac_ptr
, *mac_end
;
21578 struct macro_source_file
*current_file
= 0;
21579 enum dwarf_macro_record_type macinfo_type
;
21580 unsigned int offset_size
= cu
->header
.offset_size
;
21581 const gdb_byte
*opcode_definitions
[256];
21582 struct cleanup
*cleanup
;
21583 htab_t include_hash
;
21585 struct dwarf2_section_info
*section
;
21586 const char *section_name
;
21588 if (cu
->dwo_unit
!= NULL
)
21590 if (section_is_gnu
)
21592 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21593 section_name
= ".debug_macro.dwo";
21597 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21598 section_name
= ".debug_macinfo.dwo";
21603 if (section_is_gnu
)
21605 section
= &dwarf2_per_objfile
->macro
;
21606 section_name
= ".debug_macro";
21610 section
= &dwarf2_per_objfile
->macinfo
;
21611 section_name
= ".debug_macinfo";
21615 dwarf2_read_section (objfile
, section
);
21616 if (section
->buffer
== NULL
)
21618 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21621 abfd
= get_section_bfd_owner (section
);
21623 /* First pass: Find the name of the base filename.
21624 This filename is needed in order to process all macros whose definition
21625 (or undefinition) comes from the command line. These macros are defined
21626 before the first DW_MACINFO_start_file entry, and yet still need to be
21627 associated to the base file.
21629 To determine the base file name, we scan the macro definitions until we
21630 reach the first DW_MACINFO_start_file entry. We then initialize
21631 CURRENT_FILE accordingly so that any macro definition found before the
21632 first DW_MACINFO_start_file can still be associated to the base file. */
21634 mac_ptr
= section
->buffer
+ offset
;
21635 mac_end
= section
->buffer
+ section
->size
;
21637 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21638 &offset_size
, section_is_gnu
);
21639 if (mac_ptr
== NULL
)
21641 /* We already issued a complaint. */
21647 /* Do we at least have room for a macinfo type byte? */
21648 if (mac_ptr
>= mac_end
)
21650 /* Complaint is printed during the second pass as GDB will probably
21651 stop the first pass earlier upon finding
21652 DW_MACINFO_start_file. */
21656 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21659 /* Note that we rely on the fact that the corresponding GNU and
21660 DWARF constants are the same. */
21661 switch (macinfo_type
)
21663 /* A zero macinfo type indicates the end of the macro
21668 case DW_MACRO_GNU_define
:
21669 case DW_MACRO_GNU_undef
:
21670 /* Only skip the data by MAC_PTR. */
21672 unsigned int bytes_read
;
21674 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21675 mac_ptr
+= bytes_read
;
21676 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21677 mac_ptr
+= bytes_read
;
21681 case DW_MACRO_GNU_start_file
:
21683 unsigned int bytes_read
;
21686 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21687 mac_ptr
+= bytes_read
;
21688 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21689 mac_ptr
+= bytes_read
;
21691 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21695 case DW_MACRO_GNU_end_file
:
21696 /* No data to skip by MAC_PTR. */
21699 case DW_MACRO_GNU_define_indirect
:
21700 case DW_MACRO_GNU_undef_indirect
:
21701 case DW_MACRO_GNU_define_indirect_alt
:
21702 case DW_MACRO_GNU_undef_indirect_alt
:
21704 unsigned int bytes_read
;
21706 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21707 mac_ptr
+= bytes_read
;
21708 mac_ptr
+= offset_size
;
21712 case DW_MACRO_GNU_transparent_include
:
21713 case DW_MACRO_GNU_transparent_include_alt
:
21714 /* Note that, according to the spec, a transparent include
21715 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21716 skip this opcode. */
21717 mac_ptr
+= offset_size
;
21720 case DW_MACINFO_vendor_ext
:
21721 /* Only skip the data by MAC_PTR. */
21722 if (!section_is_gnu
)
21724 unsigned int bytes_read
;
21726 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21727 mac_ptr
+= bytes_read
;
21728 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21729 mac_ptr
+= bytes_read
;
21734 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21735 mac_ptr
, mac_end
, abfd
, offset_size
,
21737 if (mac_ptr
== NULL
)
21741 } while (macinfo_type
!= 0 && current_file
== NULL
);
21743 /* Second pass: Process all entries.
21745 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21746 command-line macro definitions/undefinitions. This flag is unset when we
21747 reach the first DW_MACINFO_start_file entry. */
21749 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21750 NULL
, xcalloc
, xfree
);
21751 cleanup
= make_cleanup_htab_delete (include_hash
);
21752 mac_ptr
= section
->buffer
+ offset
;
21753 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21754 *slot
= (void *) mac_ptr
;
21755 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21756 current_file
, lh
, section
,
21757 section_is_gnu
, 0, offset_size
, include_hash
);
21758 do_cleanups (cleanup
);
21761 /* Check if the attribute's form is a DW_FORM_block*
21762 if so return true else false. */
21765 attr_form_is_block (const struct attribute
*attr
)
21767 return (attr
== NULL
? 0 :
21768 attr
->form
== DW_FORM_block1
21769 || attr
->form
== DW_FORM_block2
21770 || attr
->form
== DW_FORM_block4
21771 || attr
->form
== DW_FORM_block
21772 || attr
->form
== DW_FORM_exprloc
);
21775 /* Return non-zero if ATTR's value is a section offset --- classes
21776 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21777 You may use DW_UNSND (attr) to retrieve such offsets.
21779 Section 7.5.4, "Attribute Encodings", explains that no attribute
21780 may have a value that belongs to more than one of these classes; it
21781 would be ambiguous if we did, because we use the same forms for all
21785 attr_form_is_section_offset (const struct attribute
*attr
)
21787 return (attr
->form
== DW_FORM_data4
21788 || attr
->form
== DW_FORM_data8
21789 || attr
->form
== DW_FORM_sec_offset
);
21792 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21793 zero otherwise. When this function returns true, you can apply
21794 dwarf2_get_attr_constant_value to it.
21796 However, note that for some attributes you must check
21797 attr_form_is_section_offset before using this test. DW_FORM_data4
21798 and DW_FORM_data8 are members of both the constant class, and of
21799 the classes that contain offsets into other debug sections
21800 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21801 that, if an attribute's can be either a constant or one of the
21802 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21803 taken as section offsets, not constants. */
21806 attr_form_is_constant (const struct attribute
*attr
)
21808 switch (attr
->form
)
21810 case DW_FORM_sdata
:
21811 case DW_FORM_udata
:
21812 case DW_FORM_data1
:
21813 case DW_FORM_data2
:
21814 case DW_FORM_data4
:
21815 case DW_FORM_data8
:
21823 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21824 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21827 attr_form_is_ref (const struct attribute
*attr
)
21829 switch (attr
->form
)
21831 case DW_FORM_ref_addr
:
21836 case DW_FORM_ref_udata
:
21837 case DW_FORM_GNU_ref_alt
:
21844 /* Return the .debug_loc section to use for CU.
21845 For DWO files use .debug_loc.dwo. */
21847 static struct dwarf2_section_info
*
21848 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21851 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21852 return &dwarf2_per_objfile
->loc
;
21855 /* A helper function that fills in a dwarf2_loclist_baton. */
21858 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21859 struct dwarf2_loclist_baton
*baton
,
21860 const struct attribute
*attr
)
21862 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21864 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21866 baton
->per_cu
= cu
->per_cu
;
21867 gdb_assert (baton
->per_cu
);
21868 /* We don't know how long the location list is, but make sure we
21869 don't run off the edge of the section. */
21870 baton
->size
= section
->size
- DW_UNSND (attr
);
21871 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21872 baton
->base_address
= cu
->base_address
;
21873 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21877 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21878 struct dwarf2_cu
*cu
, int is_block
)
21880 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21881 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21883 if (attr_form_is_section_offset (attr
)
21884 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21885 the section. If so, fall through to the complaint in the
21887 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21889 struct dwarf2_loclist_baton
*baton
;
21891 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21893 fill_in_loclist_baton (cu
, baton
, attr
);
21895 if (cu
->base_known
== 0)
21896 complaint (&symfile_complaints
,
21897 _("Location list used without "
21898 "specifying the CU base address."));
21900 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21901 ? dwarf2_loclist_block_index
21902 : dwarf2_loclist_index
);
21903 SYMBOL_LOCATION_BATON (sym
) = baton
;
21907 struct dwarf2_locexpr_baton
*baton
;
21909 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21910 baton
->per_cu
= cu
->per_cu
;
21911 gdb_assert (baton
->per_cu
);
21913 if (attr_form_is_block (attr
))
21915 /* Note that we're just copying the block's data pointer
21916 here, not the actual data. We're still pointing into the
21917 info_buffer for SYM's objfile; right now we never release
21918 that buffer, but when we do clean up properly this may
21920 baton
->size
= DW_BLOCK (attr
)->size
;
21921 baton
->data
= DW_BLOCK (attr
)->data
;
21925 dwarf2_invalid_attrib_class_complaint ("location description",
21926 SYMBOL_NATURAL_NAME (sym
));
21930 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21931 ? dwarf2_locexpr_block_index
21932 : dwarf2_locexpr_index
);
21933 SYMBOL_LOCATION_BATON (sym
) = baton
;
21937 /* Return the OBJFILE associated with the compilation unit CU. If CU
21938 came from a separate debuginfo file, then the master objfile is
21942 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21944 struct objfile
*objfile
= per_cu
->objfile
;
21946 /* Return the master objfile, so that we can report and look up the
21947 correct file containing this variable. */
21948 if (objfile
->separate_debug_objfile_backlink
)
21949 objfile
= objfile
->separate_debug_objfile_backlink
;
21954 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21955 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21956 CU_HEADERP first. */
21958 static const struct comp_unit_head
*
21959 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21960 struct dwarf2_per_cu_data
*per_cu
)
21962 const gdb_byte
*info_ptr
;
21965 return &per_cu
->cu
->header
;
21967 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21969 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21970 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21975 /* Return the address size given in the compilation unit header for CU. */
21978 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21980 struct comp_unit_head cu_header_local
;
21981 const struct comp_unit_head
*cu_headerp
;
21983 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21985 return cu_headerp
->addr_size
;
21988 /* Return the offset size given in the compilation unit header for CU. */
21991 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21993 struct comp_unit_head cu_header_local
;
21994 const struct comp_unit_head
*cu_headerp
;
21996 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21998 return cu_headerp
->offset_size
;
22001 /* See its dwarf2loc.h declaration. */
22004 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22006 struct comp_unit_head cu_header_local
;
22007 const struct comp_unit_head
*cu_headerp
;
22009 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22011 if (cu_headerp
->version
== 2)
22012 return cu_headerp
->addr_size
;
22014 return cu_headerp
->offset_size
;
22017 /* Return the text offset of the CU. The returned offset comes from
22018 this CU's objfile. If this objfile came from a separate debuginfo
22019 file, then the offset may be different from the corresponding
22020 offset in the parent objfile. */
22023 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22025 struct objfile
*objfile
= per_cu
->objfile
;
22027 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22030 /* Locate the .debug_info compilation unit from CU's objfile which contains
22031 the DIE at OFFSET. Raises an error on failure. */
22033 static struct dwarf2_per_cu_data
*
22034 dwarf2_find_containing_comp_unit (sect_offset offset
,
22035 unsigned int offset_in_dwz
,
22036 struct objfile
*objfile
)
22038 struct dwarf2_per_cu_data
*this_cu
;
22040 const sect_offset
*cu_off
;
22043 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22046 struct dwarf2_per_cu_data
*mid_cu
;
22047 int mid
= low
+ (high
- low
) / 2;
22049 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22050 cu_off
= &mid_cu
->offset
;
22051 if (mid_cu
->is_dwz
> offset_in_dwz
22052 || (mid_cu
->is_dwz
== offset_in_dwz
22053 && cu_off
->sect_off
>= offset
.sect_off
))
22058 gdb_assert (low
== high
);
22059 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22060 cu_off
= &this_cu
->offset
;
22061 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22063 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22064 error (_("Dwarf Error: could not find partial DIE containing "
22065 "offset 0x%lx [in module %s]"),
22066 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22068 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22069 <= offset
.sect_off
);
22070 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22074 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22075 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22076 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22077 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22078 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22083 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22086 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22088 memset (cu
, 0, sizeof (*cu
));
22090 cu
->per_cu
= per_cu
;
22091 cu
->objfile
= per_cu
->objfile
;
22092 obstack_init (&cu
->comp_unit_obstack
);
22095 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22098 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22099 enum language pretend_language
)
22101 struct attribute
*attr
;
22103 /* Set the language we're debugging. */
22104 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22106 set_cu_language (DW_UNSND (attr
), cu
);
22109 cu
->language
= pretend_language
;
22110 cu
->language_defn
= language_def (cu
->language
);
22113 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22116 /* Release one cached compilation unit, CU. We unlink it from the tree
22117 of compilation units, but we don't remove it from the read_in_chain;
22118 the caller is responsible for that.
22119 NOTE: DATA is a void * because this function is also used as a
22120 cleanup routine. */
22123 free_heap_comp_unit (void *data
)
22125 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22127 gdb_assert (cu
->per_cu
!= NULL
);
22128 cu
->per_cu
->cu
= NULL
;
22131 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22136 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22137 when we're finished with it. We can't free the pointer itself, but be
22138 sure to unlink it from the cache. Also release any associated storage. */
22141 free_stack_comp_unit (void *data
)
22143 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22145 gdb_assert (cu
->per_cu
!= NULL
);
22146 cu
->per_cu
->cu
= NULL
;
22149 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22150 cu
->partial_dies
= NULL
;
22153 /* Free all cached compilation units. */
22156 free_cached_comp_units (void *data
)
22158 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22160 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22161 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22162 while (per_cu
!= NULL
)
22164 struct dwarf2_per_cu_data
*next_cu
;
22166 next_cu
= per_cu
->cu
->read_in_chain
;
22168 free_heap_comp_unit (per_cu
->cu
);
22169 *last_chain
= next_cu
;
22175 /* Increase the age counter on each cached compilation unit, and free
22176 any that are too old. */
22179 age_cached_comp_units (void)
22181 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22183 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22184 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22185 while (per_cu
!= NULL
)
22187 per_cu
->cu
->last_used
++;
22188 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22189 dwarf2_mark (per_cu
->cu
);
22190 per_cu
= per_cu
->cu
->read_in_chain
;
22193 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22194 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22195 while (per_cu
!= NULL
)
22197 struct dwarf2_per_cu_data
*next_cu
;
22199 next_cu
= per_cu
->cu
->read_in_chain
;
22201 if (!per_cu
->cu
->mark
)
22203 free_heap_comp_unit (per_cu
->cu
);
22204 *last_chain
= next_cu
;
22207 last_chain
= &per_cu
->cu
->read_in_chain
;
22213 /* Remove a single compilation unit from the cache. */
22216 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22218 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22220 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22221 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22222 while (per_cu
!= NULL
)
22224 struct dwarf2_per_cu_data
*next_cu
;
22226 next_cu
= per_cu
->cu
->read_in_chain
;
22228 if (per_cu
== target_per_cu
)
22230 free_heap_comp_unit (per_cu
->cu
);
22232 *last_chain
= next_cu
;
22236 last_chain
= &per_cu
->cu
->read_in_chain
;
22242 /* Release all extra memory associated with OBJFILE. */
22245 dwarf2_free_objfile (struct objfile
*objfile
)
22248 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22249 dwarf2_objfile_data_key
);
22251 if (dwarf2_per_objfile
== NULL
)
22254 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22255 free_cached_comp_units (NULL
);
22257 if (dwarf2_per_objfile
->quick_file_names_table
)
22258 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22260 if (dwarf2_per_objfile
->line_header_hash
)
22261 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22263 /* Everything else should be on the objfile obstack. */
22266 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22267 We store these in a hash table separate from the DIEs, and preserve them
22268 when the DIEs are flushed out of cache.
22270 The CU "per_cu" pointer is needed because offset alone is not enough to
22271 uniquely identify the type. A file may have multiple .debug_types sections,
22272 or the type may come from a DWO file. Furthermore, while it's more logical
22273 to use per_cu->section+offset, with Fission the section with the data is in
22274 the DWO file but we don't know that section at the point we need it.
22275 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22276 because we can enter the lookup routine, get_die_type_at_offset, from
22277 outside this file, and thus won't necessarily have PER_CU->cu.
22278 Fortunately, PER_CU is stable for the life of the objfile. */
22280 struct dwarf2_per_cu_offset_and_type
22282 const struct dwarf2_per_cu_data
*per_cu
;
22283 sect_offset offset
;
22287 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22290 per_cu_offset_and_type_hash (const void *item
)
22292 const struct dwarf2_per_cu_offset_and_type
*ofs
22293 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22295 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22298 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22301 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22303 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22304 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22305 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22306 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22308 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22309 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22312 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22313 table if necessary. For convenience, return TYPE.
22315 The DIEs reading must have careful ordering to:
22316 * Not cause infite loops trying to read in DIEs as a prerequisite for
22317 reading current DIE.
22318 * Not trying to dereference contents of still incompletely read in types
22319 while reading in other DIEs.
22320 * Enable referencing still incompletely read in types just by a pointer to
22321 the type without accessing its fields.
22323 Therefore caller should follow these rules:
22324 * Try to fetch any prerequisite types we may need to build this DIE type
22325 before building the type and calling set_die_type.
22326 * After building type call set_die_type for current DIE as soon as
22327 possible before fetching more types to complete the current type.
22328 * Make the type as complete as possible before fetching more types. */
22330 static struct type
*
22331 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22333 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22334 struct objfile
*objfile
= cu
->objfile
;
22335 struct attribute
*attr
;
22336 struct dynamic_prop prop
;
22338 /* For Ada types, make sure that the gnat-specific data is always
22339 initialized (if not already set). There are a few types where
22340 we should not be doing so, because the type-specific area is
22341 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22342 where the type-specific area is used to store the floatformat).
22343 But this is not a problem, because the gnat-specific information
22344 is actually not needed for these types. */
22345 if (need_gnat_info (cu
)
22346 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22347 && TYPE_CODE (type
) != TYPE_CODE_FLT
22348 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22349 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22350 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22351 && !HAVE_GNAT_AUX_INFO (type
))
22352 INIT_GNAT_SPECIFIC (type
);
22354 /* Read DW_AT_data_location and set in type. */
22355 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22356 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22357 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22359 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22361 dwarf2_per_objfile
->die_type_hash
=
22362 htab_create_alloc_ex (127,
22363 per_cu_offset_and_type_hash
,
22364 per_cu_offset_and_type_eq
,
22366 &objfile
->objfile_obstack
,
22367 hashtab_obstack_allocate
,
22368 dummy_obstack_deallocate
);
22371 ofs
.per_cu
= cu
->per_cu
;
22372 ofs
.offset
= die
->offset
;
22374 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22375 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22377 complaint (&symfile_complaints
,
22378 _("A problem internal to GDB: DIE 0x%x has type already set"),
22379 die
->offset
.sect_off
);
22380 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22381 struct dwarf2_per_cu_offset_and_type
);
22386 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22387 or return NULL if the die does not have a saved type. */
22389 static struct type
*
22390 get_die_type_at_offset (sect_offset offset
,
22391 struct dwarf2_per_cu_data
*per_cu
)
22393 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22395 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22398 ofs
.per_cu
= per_cu
;
22399 ofs
.offset
= offset
;
22400 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22401 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22408 /* Look up the type for DIE in CU in die_type_hash,
22409 or return NULL if DIE does not have a saved type. */
22411 static struct type
*
22412 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22414 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22417 /* Add a dependence relationship from CU to REF_PER_CU. */
22420 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22421 struct dwarf2_per_cu_data
*ref_per_cu
)
22425 if (cu
->dependencies
== NULL
)
22427 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22428 NULL
, &cu
->comp_unit_obstack
,
22429 hashtab_obstack_allocate
,
22430 dummy_obstack_deallocate
);
22432 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22434 *slot
= ref_per_cu
;
22437 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22438 Set the mark field in every compilation unit in the
22439 cache that we must keep because we are keeping CU. */
22442 dwarf2_mark_helper (void **slot
, void *data
)
22444 struct dwarf2_per_cu_data
*per_cu
;
22446 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22448 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22449 reading of the chain. As such dependencies remain valid it is not much
22450 useful to track and undo them during QUIT cleanups. */
22451 if (per_cu
->cu
== NULL
)
22454 if (per_cu
->cu
->mark
)
22456 per_cu
->cu
->mark
= 1;
22458 if (per_cu
->cu
->dependencies
!= NULL
)
22459 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22464 /* Set the mark field in CU and in every other compilation unit in the
22465 cache that we must keep because we are keeping CU. */
22468 dwarf2_mark (struct dwarf2_cu
*cu
)
22473 if (cu
->dependencies
!= NULL
)
22474 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22478 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22482 per_cu
->cu
->mark
= 0;
22483 per_cu
= per_cu
->cu
->read_in_chain
;
22487 /* Trivial hash function for partial_die_info: the hash value of a DIE
22488 is its offset in .debug_info for this objfile. */
22491 partial_die_hash (const void *item
)
22493 const struct partial_die_info
*part_die
22494 = (const struct partial_die_info
*) item
;
22496 return part_die
->offset
.sect_off
;
22499 /* Trivial comparison function for partial_die_info structures: two DIEs
22500 are equal if they have the same offset. */
22503 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22505 const struct partial_die_info
*part_die_lhs
22506 = (const struct partial_die_info
*) item_lhs
;
22507 const struct partial_die_info
*part_die_rhs
22508 = (const struct partial_die_info
*) item_rhs
;
22510 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22513 static struct cmd_list_element
*set_dwarf_cmdlist
;
22514 static struct cmd_list_element
*show_dwarf_cmdlist
;
22517 set_dwarf_cmd (char *args
, int from_tty
)
22519 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22524 show_dwarf_cmd (char *args
, int from_tty
)
22526 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22529 /* Free data associated with OBJFILE, if necessary. */
22532 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22534 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22537 /* Make sure we don't accidentally use dwarf2_per_objfile while
22539 dwarf2_per_objfile
= NULL
;
22541 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22542 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22544 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22545 VEC_free (dwarf2_per_cu_ptr
,
22546 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22547 xfree (data
->all_type_units
);
22549 VEC_free (dwarf2_section_info_def
, data
->types
);
22551 if (data
->dwo_files
)
22552 free_dwo_files (data
->dwo_files
, objfile
);
22553 if (data
->dwp_file
)
22554 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22556 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22557 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22561 /* The "save gdb-index" command. */
22563 /* The contents of the hash table we create when building the string
22565 struct strtab_entry
22567 offset_type offset
;
22571 /* Hash function for a strtab_entry.
22573 Function is used only during write_hash_table so no index format backward
22574 compatibility is needed. */
22577 hash_strtab_entry (const void *e
)
22579 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22580 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22583 /* Equality function for a strtab_entry. */
22586 eq_strtab_entry (const void *a
, const void *b
)
22588 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22589 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22590 return !strcmp (ea
->str
, eb
->str
);
22593 /* Create a strtab_entry hash table. */
22596 create_strtab (void)
22598 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22599 xfree
, xcalloc
, xfree
);
22602 /* Add a string to the constant pool. Return the string's offset in
22606 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22609 struct strtab_entry entry
;
22610 struct strtab_entry
*result
;
22613 slot
= htab_find_slot (table
, &entry
, INSERT
);
22615 result
= (struct strtab_entry
*) *slot
;
22618 result
= XNEW (struct strtab_entry
);
22619 result
->offset
= obstack_object_size (cpool
);
22621 obstack_grow_str0 (cpool
, str
);
22624 return result
->offset
;
22627 /* An entry in the symbol table. */
22628 struct symtab_index_entry
22630 /* The name of the symbol. */
22632 /* The offset of the name in the constant pool. */
22633 offset_type index_offset
;
22634 /* A sorted vector of the indices of all the CUs that hold an object
22636 VEC (offset_type
) *cu_indices
;
22639 /* The symbol table. This is a power-of-2-sized hash table. */
22640 struct mapped_symtab
22642 offset_type n_elements
;
22644 struct symtab_index_entry
**data
;
22647 /* Hash function for a symtab_index_entry. */
22650 hash_symtab_entry (const void *e
)
22652 const struct symtab_index_entry
*entry
22653 = (const struct symtab_index_entry
*) e
;
22654 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22655 sizeof (offset_type
) * VEC_length (offset_type
,
22656 entry
->cu_indices
),
22660 /* Equality function for a symtab_index_entry. */
22663 eq_symtab_entry (const void *a
, const void *b
)
22665 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22666 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22667 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22668 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22670 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22671 VEC_address (offset_type
, eb
->cu_indices
),
22672 sizeof (offset_type
) * len
);
22675 /* Destroy a symtab_index_entry. */
22678 delete_symtab_entry (void *p
)
22680 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22681 VEC_free (offset_type
, entry
->cu_indices
);
22685 /* Create a hash table holding symtab_index_entry objects. */
22688 create_symbol_hash_table (void)
22690 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22691 delete_symtab_entry
, xcalloc
, xfree
);
22694 /* Create a new mapped symtab object. */
22696 static struct mapped_symtab
*
22697 create_mapped_symtab (void)
22699 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22700 symtab
->n_elements
= 0;
22701 symtab
->size
= 1024;
22702 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22706 /* Destroy a mapped_symtab. */
22709 cleanup_mapped_symtab (void *p
)
22711 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22712 /* The contents of the array are freed when the other hash table is
22714 xfree (symtab
->data
);
22718 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22721 Function is used only during write_hash_table so no index format backward
22722 compatibility is needed. */
22724 static struct symtab_index_entry
**
22725 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22727 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22729 index
= hash
& (symtab
->size
- 1);
22730 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22734 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22735 return &symtab
->data
[index
];
22736 index
= (index
+ step
) & (symtab
->size
- 1);
22740 /* Expand SYMTAB's hash table. */
22743 hash_expand (struct mapped_symtab
*symtab
)
22745 offset_type old_size
= symtab
->size
;
22747 struct symtab_index_entry
**old_entries
= symtab
->data
;
22750 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22752 for (i
= 0; i
< old_size
; ++i
)
22754 if (old_entries
[i
])
22756 struct symtab_index_entry
**slot
= find_slot (symtab
,
22757 old_entries
[i
]->name
);
22758 *slot
= old_entries
[i
];
22762 xfree (old_entries
);
22765 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22766 CU_INDEX is the index of the CU in which the symbol appears.
22767 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22770 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22771 int is_static
, gdb_index_symbol_kind kind
,
22772 offset_type cu_index
)
22774 struct symtab_index_entry
**slot
;
22775 offset_type cu_index_and_attrs
;
22777 ++symtab
->n_elements
;
22778 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22779 hash_expand (symtab
);
22781 slot
= find_slot (symtab
, name
);
22784 *slot
= XNEW (struct symtab_index_entry
);
22785 (*slot
)->name
= name
;
22786 /* index_offset is set later. */
22787 (*slot
)->cu_indices
= NULL
;
22790 cu_index_and_attrs
= 0;
22791 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22792 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22793 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22795 /* We don't want to record an index value twice as we want to avoid the
22797 We process all global symbols and then all static symbols
22798 (which would allow us to avoid the duplication by only having to check
22799 the last entry pushed), but a symbol could have multiple kinds in one CU.
22800 To keep things simple we don't worry about the duplication here and
22801 sort and uniqufy the list after we've processed all symbols. */
22802 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22805 /* qsort helper routine for uniquify_cu_indices. */
22808 offset_type_compare (const void *ap
, const void *bp
)
22810 offset_type a
= *(offset_type
*) ap
;
22811 offset_type b
= *(offset_type
*) bp
;
22813 return (a
> b
) - (b
> a
);
22816 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22819 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22823 for (i
= 0; i
< symtab
->size
; ++i
)
22825 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22828 && entry
->cu_indices
!= NULL
)
22830 unsigned int next_to_insert
, next_to_check
;
22831 offset_type last_value
;
22833 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22834 VEC_length (offset_type
, entry
->cu_indices
),
22835 sizeof (offset_type
), offset_type_compare
);
22837 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22838 next_to_insert
= 1;
22839 for (next_to_check
= 1;
22840 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22843 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22846 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22848 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22853 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22858 /* Add a vector of indices to the constant pool. */
22861 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22862 struct symtab_index_entry
*entry
)
22866 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22869 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22870 offset_type val
= MAYBE_SWAP (len
);
22875 entry
->index_offset
= obstack_object_size (cpool
);
22877 obstack_grow (cpool
, &val
, sizeof (val
));
22879 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22882 val
= MAYBE_SWAP (iter
);
22883 obstack_grow (cpool
, &val
, sizeof (val
));
22888 struct symtab_index_entry
*old_entry
22889 = (struct symtab_index_entry
*) *slot
;
22890 entry
->index_offset
= old_entry
->index_offset
;
22893 return entry
->index_offset
;
22896 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22897 constant pool entries going into the obstack CPOOL. */
22900 write_hash_table (struct mapped_symtab
*symtab
,
22901 struct obstack
*output
, struct obstack
*cpool
)
22904 htab_t symbol_hash_table
;
22907 symbol_hash_table
= create_symbol_hash_table ();
22908 str_table
= create_strtab ();
22910 /* We add all the index vectors to the constant pool first, to
22911 ensure alignment is ok. */
22912 for (i
= 0; i
< symtab
->size
; ++i
)
22914 if (symtab
->data
[i
])
22915 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22918 /* Now write out the hash table. */
22919 for (i
= 0; i
< symtab
->size
; ++i
)
22921 offset_type str_off
, vec_off
;
22923 if (symtab
->data
[i
])
22925 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22926 vec_off
= symtab
->data
[i
]->index_offset
;
22930 /* While 0 is a valid constant pool index, it is not valid
22931 to have 0 for both offsets. */
22936 str_off
= MAYBE_SWAP (str_off
);
22937 vec_off
= MAYBE_SWAP (vec_off
);
22939 obstack_grow (output
, &str_off
, sizeof (str_off
));
22940 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22943 htab_delete (str_table
);
22944 htab_delete (symbol_hash_table
);
22947 /* Struct to map psymtab to CU index in the index file. */
22948 struct psymtab_cu_index_map
22950 struct partial_symtab
*psymtab
;
22951 unsigned int cu_index
;
22955 hash_psymtab_cu_index (const void *item
)
22957 const struct psymtab_cu_index_map
*map
22958 = (const struct psymtab_cu_index_map
*) item
;
22960 return htab_hash_pointer (map
->psymtab
);
22964 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22966 const struct psymtab_cu_index_map
*lhs
22967 = (const struct psymtab_cu_index_map
*) item_lhs
;
22968 const struct psymtab_cu_index_map
*rhs
22969 = (const struct psymtab_cu_index_map
*) item_rhs
;
22971 return lhs
->psymtab
== rhs
->psymtab
;
22974 /* Helper struct for building the address table. */
22975 struct addrmap_index_data
22977 struct objfile
*objfile
;
22978 struct obstack
*addr_obstack
;
22979 htab_t cu_index_htab
;
22981 /* Non-zero if the previous_* fields are valid.
22982 We can't write an entry until we see the next entry (since it is only then
22983 that we know the end of the entry). */
22984 int previous_valid
;
22985 /* Index of the CU in the table of all CUs in the index file. */
22986 unsigned int previous_cu_index
;
22987 /* Start address of the CU. */
22988 CORE_ADDR previous_cu_start
;
22991 /* Write an address entry to OBSTACK. */
22994 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22995 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22997 offset_type cu_index_to_write
;
22999 CORE_ADDR baseaddr
;
23001 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23003 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23004 obstack_grow (obstack
, addr
, 8);
23005 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23006 obstack_grow (obstack
, addr
, 8);
23007 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23008 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23011 /* Worker function for traversing an addrmap to build the address table. */
23014 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23016 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23017 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23019 if (data
->previous_valid
)
23020 add_address_entry (data
->objfile
, data
->addr_obstack
,
23021 data
->previous_cu_start
, start_addr
,
23022 data
->previous_cu_index
);
23024 data
->previous_cu_start
= start_addr
;
23027 struct psymtab_cu_index_map find_map
, *map
;
23028 find_map
.psymtab
= pst
;
23029 map
= ((struct psymtab_cu_index_map
*)
23030 htab_find (data
->cu_index_htab
, &find_map
));
23031 gdb_assert (map
!= NULL
);
23032 data
->previous_cu_index
= map
->cu_index
;
23033 data
->previous_valid
= 1;
23036 data
->previous_valid
= 0;
23041 /* Write OBJFILE's address map to OBSTACK.
23042 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23043 in the index file. */
23046 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23047 htab_t cu_index_htab
)
23049 struct addrmap_index_data addrmap_index_data
;
23051 /* When writing the address table, we have to cope with the fact that
23052 the addrmap iterator only provides the start of a region; we have to
23053 wait until the next invocation to get the start of the next region. */
23055 addrmap_index_data
.objfile
= objfile
;
23056 addrmap_index_data
.addr_obstack
= obstack
;
23057 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23058 addrmap_index_data
.previous_valid
= 0;
23060 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23061 &addrmap_index_data
);
23063 /* It's highly unlikely the last entry (end address = 0xff...ff)
23064 is valid, but we should still handle it.
23065 The end address is recorded as the start of the next region, but that
23066 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23068 if (addrmap_index_data
.previous_valid
)
23069 add_address_entry (objfile
, obstack
,
23070 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23071 addrmap_index_data
.previous_cu_index
);
23074 /* Return the symbol kind of PSYM. */
23076 static gdb_index_symbol_kind
23077 symbol_kind (struct partial_symbol
*psym
)
23079 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23080 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23088 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23090 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23092 case LOC_CONST_BYTES
:
23093 case LOC_OPTIMIZED_OUT
:
23095 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23097 /* Note: It's currently impossible to recognize psyms as enum values
23098 short of reading the type info. For now punt. */
23099 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23101 /* There are other LOC_FOO values that one might want to classify
23102 as variables, but dwarf2read.c doesn't currently use them. */
23103 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23105 case STRUCT_DOMAIN
:
23106 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23108 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23112 /* Add a list of partial symbols to SYMTAB. */
23115 write_psymbols (struct mapped_symtab
*symtab
,
23117 struct partial_symbol
**psymp
,
23119 offset_type cu_index
,
23122 for (; count
-- > 0; ++psymp
)
23124 struct partial_symbol
*psym
= *psymp
;
23127 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23128 error (_("Ada is not currently supported by the index"));
23130 /* Only add a given psymbol once. */
23131 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23134 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23137 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23138 is_static
, kind
, cu_index
);
23143 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23144 exception if there is an error. */
23147 write_obstack (FILE *file
, struct obstack
*obstack
)
23149 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23151 != obstack_object_size (obstack
))
23152 error (_("couldn't data write to file"));
23155 /* Unlink a file if the argument is not NULL. */
23158 unlink_if_set (void *p
)
23160 char **filename
= (char **) p
;
23162 unlink (*filename
);
23165 /* A helper struct used when iterating over debug_types. */
23166 struct signatured_type_index_data
23168 struct objfile
*objfile
;
23169 struct mapped_symtab
*symtab
;
23170 struct obstack
*types_list
;
23175 /* A helper function that writes a single signatured_type to an
23179 write_one_signatured_type (void **slot
, void *d
)
23181 struct signatured_type_index_data
*info
23182 = (struct signatured_type_index_data
*) d
;
23183 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23184 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23187 write_psymbols (info
->symtab
,
23189 info
->objfile
->global_psymbols
.list
23190 + psymtab
->globals_offset
,
23191 psymtab
->n_global_syms
, info
->cu_index
,
23193 write_psymbols (info
->symtab
,
23195 info
->objfile
->static_psymbols
.list
23196 + psymtab
->statics_offset
,
23197 psymtab
->n_static_syms
, info
->cu_index
,
23200 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23201 entry
->per_cu
.offset
.sect_off
);
23202 obstack_grow (info
->types_list
, val
, 8);
23203 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23204 entry
->type_offset_in_tu
.cu_off
);
23205 obstack_grow (info
->types_list
, val
, 8);
23206 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23207 obstack_grow (info
->types_list
, val
, 8);
23214 /* Recurse into all "included" dependencies and write their symbols as
23215 if they appeared in this psymtab. */
23218 recursively_write_psymbols (struct objfile
*objfile
,
23219 struct partial_symtab
*psymtab
,
23220 struct mapped_symtab
*symtab
,
23222 offset_type cu_index
)
23226 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23227 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23228 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23229 symtab
, psyms_seen
, cu_index
);
23231 write_psymbols (symtab
,
23233 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23234 psymtab
->n_global_syms
, cu_index
,
23236 write_psymbols (symtab
,
23238 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23239 psymtab
->n_static_syms
, cu_index
,
23243 /* Create an index file for OBJFILE in the directory DIR. */
23246 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23248 struct cleanup
*cleanup
;
23249 char *filename
, *cleanup_filename
;
23250 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23251 struct obstack cu_list
, types_cu_list
;
23254 struct mapped_symtab
*symtab
;
23255 offset_type val
, size_of_contents
, total_len
;
23258 htab_t cu_index_htab
;
23259 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23261 if (dwarf2_per_objfile
->using_index
)
23262 error (_("Cannot use an index to create the index"));
23264 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23265 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23267 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23270 if (stat (objfile_name (objfile
), &st
) < 0)
23271 perror_with_name (objfile_name (objfile
));
23273 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23274 INDEX_SUFFIX
, (char *) NULL
);
23275 cleanup
= make_cleanup (xfree
, filename
);
23277 out_file
= gdb_fopen_cloexec (filename
, "wb");
23279 error (_("Can't open `%s' for writing"), filename
);
23281 cleanup_filename
= filename
;
23282 make_cleanup (unlink_if_set
, &cleanup_filename
);
23284 symtab
= create_mapped_symtab ();
23285 make_cleanup (cleanup_mapped_symtab
, symtab
);
23287 obstack_init (&addr_obstack
);
23288 make_cleanup_obstack_free (&addr_obstack
);
23290 obstack_init (&cu_list
);
23291 make_cleanup_obstack_free (&cu_list
);
23293 obstack_init (&types_cu_list
);
23294 make_cleanup_obstack_free (&types_cu_list
);
23296 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23297 NULL
, xcalloc
, xfree
);
23298 make_cleanup_htab_delete (psyms_seen
);
23300 /* While we're scanning CU's create a table that maps a psymtab pointer
23301 (which is what addrmap records) to its index (which is what is recorded
23302 in the index file). This will later be needed to write the address
23304 cu_index_htab
= htab_create_alloc (100,
23305 hash_psymtab_cu_index
,
23306 eq_psymtab_cu_index
,
23307 NULL
, xcalloc
, xfree
);
23308 make_cleanup_htab_delete (cu_index_htab
);
23309 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23310 dwarf2_per_objfile
->n_comp_units
);
23311 make_cleanup (xfree
, psymtab_cu_index_map
);
23313 /* The CU list is already sorted, so we don't need to do additional
23314 work here. Also, the debug_types entries do not appear in
23315 all_comp_units, but only in their own hash table. */
23316 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23318 struct dwarf2_per_cu_data
*per_cu
23319 = dwarf2_per_objfile
->all_comp_units
[i
];
23320 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23322 struct psymtab_cu_index_map
*map
;
23325 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23326 It may be referenced from a local scope but in such case it does not
23327 need to be present in .gdb_index. */
23328 if (psymtab
== NULL
)
23331 if (psymtab
->user
== NULL
)
23332 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23334 map
= &psymtab_cu_index_map
[i
];
23335 map
->psymtab
= psymtab
;
23337 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23338 gdb_assert (slot
!= NULL
);
23339 gdb_assert (*slot
== NULL
);
23342 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23343 per_cu
->offset
.sect_off
);
23344 obstack_grow (&cu_list
, val
, 8);
23345 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23346 obstack_grow (&cu_list
, val
, 8);
23349 /* Dump the address map. */
23350 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23352 /* Write out the .debug_type entries, if any. */
23353 if (dwarf2_per_objfile
->signatured_types
)
23355 struct signatured_type_index_data sig_data
;
23357 sig_data
.objfile
= objfile
;
23358 sig_data
.symtab
= symtab
;
23359 sig_data
.types_list
= &types_cu_list
;
23360 sig_data
.psyms_seen
= psyms_seen
;
23361 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23362 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23363 write_one_signatured_type
, &sig_data
);
23366 /* Now that we've processed all symbols we can shrink their cu_indices
23368 uniquify_cu_indices (symtab
);
23370 obstack_init (&constant_pool
);
23371 make_cleanup_obstack_free (&constant_pool
);
23372 obstack_init (&symtab_obstack
);
23373 make_cleanup_obstack_free (&symtab_obstack
);
23374 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23376 obstack_init (&contents
);
23377 make_cleanup_obstack_free (&contents
);
23378 size_of_contents
= 6 * sizeof (offset_type
);
23379 total_len
= size_of_contents
;
23381 /* The version number. */
23382 val
= MAYBE_SWAP (8);
23383 obstack_grow (&contents
, &val
, sizeof (val
));
23385 /* The offset of the CU list from the start of the file. */
23386 val
= MAYBE_SWAP (total_len
);
23387 obstack_grow (&contents
, &val
, sizeof (val
));
23388 total_len
+= obstack_object_size (&cu_list
);
23390 /* The offset of the types CU list from the start of the file. */
23391 val
= MAYBE_SWAP (total_len
);
23392 obstack_grow (&contents
, &val
, sizeof (val
));
23393 total_len
+= obstack_object_size (&types_cu_list
);
23395 /* The offset of the address table from the start of the file. */
23396 val
= MAYBE_SWAP (total_len
);
23397 obstack_grow (&contents
, &val
, sizeof (val
));
23398 total_len
+= obstack_object_size (&addr_obstack
);
23400 /* The offset of the symbol table from the start of the file. */
23401 val
= MAYBE_SWAP (total_len
);
23402 obstack_grow (&contents
, &val
, sizeof (val
));
23403 total_len
+= obstack_object_size (&symtab_obstack
);
23405 /* The offset of the constant pool from the start of the file. */
23406 val
= MAYBE_SWAP (total_len
);
23407 obstack_grow (&contents
, &val
, sizeof (val
));
23408 total_len
+= obstack_object_size (&constant_pool
);
23410 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23412 write_obstack (out_file
, &contents
);
23413 write_obstack (out_file
, &cu_list
);
23414 write_obstack (out_file
, &types_cu_list
);
23415 write_obstack (out_file
, &addr_obstack
);
23416 write_obstack (out_file
, &symtab_obstack
);
23417 write_obstack (out_file
, &constant_pool
);
23421 /* We want to keep the file, so we set cleanup_filename to NULL
23422 here. See unlink_if_set. */
23423 cleanup_filename
= NULL
;
23425 do_cleanups (cleanup
);
23428 /* Implementation of the `save gdb-index' command.
23430 Note that the file format used by this command is documented in the
23431 GDB manual. Any changes here must be documented there. */
23434 save_gdb_index_command (char *arg
, int from_tty
)
23436 struct objfile
*objfile
;
23439 error (_("usage: save gdb-index DIRECTORY"));
23441 ALL_OBJFILES (objfile
)
23445 /* If the objfile does not correspond to an actual file, skip it. */
23446 if (stat (objfile_name (objfile
), &st
) < 0)
23450 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23451 dwarf2_objfile_data_key
);
23452 if (dwarf2_per_objfile
)
23457 write_psymtabs_to_index (objfile
, arg
);
23459 CATCH (except
, RETURN_MASK_ERROR
)
23461 exception_fprintf (gdb_stderr
, except
,
23462 _("Error while writing index for `%s': "),
23463 objfile_name (objfile
));
23472 int dwarf_always_disassemble
;
23475 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23476 struct cmd_list_element
*c
, const char *value
)
23478 fprintf_filtered (file
,
23479 _("Whether to always disassemble "
23480 "DWARF expressions is %s.\n"),
23485 show_check_physname (struct ui_file
*file
, int from_tty
,
23486 struct cmd_list_element
*c
, const char *value
)
23488 fprintf_filtered (file
,
23489 _("Whether to check \"physname\" is %s.\n"),
23493 void _initialize_dwarf2_read (void);
23496 _initialize_dwarf2_read (void)
23498 struct cmd_list_element
*c
;
23500 dwarf2_objfile_data_key
23501 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23503 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23504 Set DWARF specific variables.\n\
23505 Configure DWARF variables such as the cache size"),
23506 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23507 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23509 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23510 Show DWARF specific variables\n\
23511 Show DWARF variables such as the cache size"),
23512 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23513 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23515 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23516 &dwarf_max_cache_age
, _("\
23517 Set the upper bound on the age of cached DWARF compilation units."), _("\
23518 Show the upper bound on the age of cached DWARF compilation units."), _("\
23519 A higher limit means that cached compilation units will be stored\n\
23520 in memory longer, and more total memory will be used. Zero disables\n\
23521 caching, which can slow down startup."),
23523 show_dwarf_max_cache_age
,
23524 &set_dwarf_cmdlist
,
23525 &show_dwarf_cmdlist
);
23527 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23528 &dwarf_always_disassemble
, _("\
23529 Set whether `info address' always disassembles DWARF expressions."), _("\
23530 Show whether `info address' always disassembles DWARF expressions."), _("\
23531 When enabled, DWARF expressions are always printed in an assembly-like\n\
23532 syntax. When disabled, expressions will be printed in a more\n\
23533 conversational style, when possible."),
23535 show_dwarf_always_disassemble
,
23536 &set_dwarf_cmdlist
,
23537 &show_dwarf_cmdlist
);
23539 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23540 Set debugging of the DWARF reader."), _("\
23541 Show debugging of the DWARF reader."), _("\
23542 When enabled (non-zero), debugging messages are printed during DWARF\n\
23543 reading and symtab expansion. A value of 1 (one) provides basic\n\
23544 information. A value greater than 1 provides more verbose information."),
23547 &setdebuglist
, &showdebuglist
);
23549 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23550 Set debugging of the DWARF DIE reader."), _("\
23551 Show debugging of the DWARF DIE reader."), _("\
23552 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23553 The value is the maximum depth to print."),
23556 &setdebuglist
, &showdebuglist
);
23558 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23559 Set debugging of the dwarf line reader."), _("\
23560 Show debugging of the dwarf line reader."), _("\
23561 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23562 A value of 1 (one) provides basic information.\n\
23563 A value greater than 1 provides more verbose information."),
23566 &setdebuglist
, &showdebuglist
);
23568 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23569 Set cross-checking of \"physname\" code against demangler."), _("\
23570 Show cross-checking of \"physname\" code against demangler."), _("\
23571 When enabled, GDB's internal \"physname\" code is checked against\n\
23573 NULL
, show_check_physname
,
23574 &setdebuglist
, &showdebuglist
);
23576 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23577 no_class
, &use_deprecated_index_sections
, _("\
23578 Set whether to use deprecated gdb_index sections."), _("\
23579 Show whether to use deprecated gdb_index sections."), _("\
23580 When enabled, deprecated .gdb_index sections are used anyway.\n\
23581 Normally they are ignored either because of a missing feature or\n\
23582 performance issue.\n\
23583 Warning: This option must be enabled before gdb reads the file."),
23586 &setlist
, &showlist
);
23588 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23590 Save a gdb-index file.\n\
23591 Usage: save gdb-index DIRECTORY"),
23593 set_cmd_completer (c
, filename_completer
);
23595 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23596 &dwarf2_locexpr_funcs
);
23597 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23598 &dwarf2_loclist_funcs
);
23600 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23601 &dwarf2_block_frame_base_locexpr_funcs
);
23602 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23603 &dwarf2_block_frame_base_loclist_funcs
);